935 files changed, 42878 insertions, 22138 deletions

diff --git a/lib/asn1/doc/src/notes.xml b/lib/asn1/doc/src/notes.xml
index ae6660c143..bb15c9ff5f 100644
--- a/lib/asn1/doc/src/notes.xml
+++ b/lib/asn1/doc/src/notes.xml
@@ -32,6 +32,48 @@
   <p>This document describes the changes made to the asn1 application.</p>
 
 
+<section><title>Asn1 5.0.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Dialyzer suppression has been added for the generated
+	    ASN.1 helper function to_bitstring/1 that previously
+	    created irrelevant warnings.</p>
+          <p>
+	    Own Id: OTP-13882 Aux Id: ERIERL-144 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Asn1 5.0.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    There was a issue with BER encoding and the
+	    <c>undec_rest</c> option in generated decoders. An
+	    exception could be thrown instead of returning an error
+	    tuple.</p>
+          <p>
+	    Own Id: OTP-14786 Aux Id: ERL-518 </p>
+        </item>
+        <item>
+          <p>
+	    The asn1ct:test functions crashed on decoders generated
+	    with options <c>no_ok_wrapper</c>, <c>undec_rest</c>.</p>
+          <p>
+	    Own Id: OTP-14787 Aux Id: ERL-518 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Asn1 5.0.3</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/asn1/src/asn1ct.erl b/lib/asn1/src/asn1ct.erl
index f36d71a601..81a2735a0d 100644
--- a/lib/asn1/src/asn1ct.erl
+++ b/lib/asn1/src/asn1ct.erl
@@ -1335,25 +1335,39 @@ test_value(Module, Type, Value) ->
     in_process(fun() ->
                    case catch Module:encode(Type, Value) of
                        {ok, Bytes} ->
-                           NewBytes = prepare_bytes(Bytes),
-                           case Module:decode(Type, NewBytes) of
-                               {ok, Value} ->
-                                   {ok, {Module, Type, Value}};
-                               {ok, Res}   ->
-                                   {error, {asn1,
-                                            {encode_decode_mismatch,
-                                             {{Module, Type, Value}, Res}}}};
-                               Error       ->
-                                   {error, {asn1,
-                                            {{decode,
-                                              {Module, Type, Value}, Error}}}}
-                           end;
+                           test_value_decode(Module, Type, Value, Bytes);
+                       Bytes when is_binary(Bytes) ->
+                           test_value_decode(Module, Type, Value, Bytes);
                        Error ->
                            {error, {asn1,
                                     {encode, {{Module, Type, Value}, Error}}}}
                    end
                end).
 
+
+test_value_decode(Module, Type, Value, Bytes) ->
+    NewBytes = prepare_bytes(Bytes),
+    case Module:decode(Type, NewBytes) of
+        {ok,Value}      -> {ok, {Module,Type,Value}};
+        {ok,Value,<<>>} -> {ok, {Module,Type,Value}};
+        Value           -> {ok, {Module,Type,Value}};
+        {Value,<<>>}    -> {ok, {Module,Type,Value}};
+
+        %% Errors:
+        {ok, Res}   ->
+            {error, {asn1,
+                     {encode_decode_mismatch,
+                      {{Module, Type, Value}, Res}}}};
+        {ok, Res, Rest} ->
+            {error, {asn1,
+                     {encode_decode_mismatch,
+                      {{Module, Type, Value}, {Res,Rest}}}}};
+        Error       ->
+            {error, {asn1,
+                     {{decode,
+                       {Module, Type, Value}, Error}}}}
+    end.
+
 value(Module, Type) -> value(Module, Type, []).
 
 value(Module, Type, Includes) ->
diff --git a/lib/asn1/src/asn1ct_gen.erl b/lib/asn1/src/asn1ct_gen.erl
index 84c7f39d55..efbc6d6380 100644
--- a/lib/asn1/src/asn1ct_gen.erl
+++ b/lib/asn1/src/asn1ct_gen.erl
@@ -707,6 +707,7 @@ gen_exports([_|_]=L0, Prefix, Arity) ->
 pgen_dispatcher(Erules, []) ->
     gen_info_functions(Erules);
 pgen_dispatcher(Gen, Types) ->
+    %% MODULE HEAD
     emit(["-export([encode/2,decode/2]).",nl,nl]),
     gen_info_functions(Gen),
 
@@ -714,6 +715,7 @@ pgen_dispatcher(Gen, Types) ->
     NoFinalPadding = lists:member(no_final_padding, Options),
     NoOkWrapper = proplists:get_bool(no_ok_wrapper, Options),
 
+    %% ENCODER
     Call = case Gen of
 	       #gen{erule=per,aligned=true} ->
 		   asn1ct_func:need({per,complete,1}),
@@ -740,6 +742,7 @@ pgen_dispatcher(Gen, Types) ->
     end,
     emit([nl,nl]),
 
+    %% DECODER
     ReturnRest = proplists:get_bool(undec_rest, Gen#gen.options),
     Data = case Gen#gen.erule =:= ber andalso ReturnRest of
 	       true -> "Data0";
@@ -747,6 +750,12 @@ pgen_dispatcher(Gen, Types) ->
 	   end,
 
     emit(["decode(Type, ",Data,") ->",nl]),
+
+    case NoOkWrapper of
+        false -> emit(["try",nl]);
+        true -> ok
+    end,
+
     DecWrap =
 	case {Gen,ReturnRest} of
 	    {#gen{erule=ber},false} ->
@@ -754,32 +763,38 @@ pgen_dispatcher(Gen, Types) ->
 		"element(1, ber_decode_nif(Data))";
 	    {#gen{erule=ber},true} ->
 		asn1ct_func:need({ber,ber_decode_nif,1}),
-		emit(["{Data,Rest} = ber_decode_nif(Data0),",nl]),
+		emit(["   {Data,Rest} = ber_decode_nif(Data0),",nl]),
 		"Data";
 	    {_,_} ->
 		"Data"
 	end,
-    emit([case NoOkWrapper of
-	      false -> "try";
-	      true -> "case"
-	  end, " decode_disp(Type, ",DecWrap,") of",nl]),
-    case Gen of
-	#gen{erule=ber} ->
-	    emit(["  Result ->",nl]);
-	#gen{erule=per} ->
-	    emit(["  {Result,Rest} ->",nl])
-    end,
-    case ReturnRest of
-	false -> result_line(NoOkWrapper, ["Result"]);
-	true ->  result_line(NoOkWrapper, ["Result","Rest"])
+
+    DecodeDisp = ["decode_disp(Type, ",DecWrap,")"],
+    case {Gen,ReturnRest} of
+	{#gen{erule=ber},true} ->
+	    emit(["   Result = ",DecodeDisp,",",nl]),
+            result_line(NoOkWrapper, ["Result","Rest"]);
+	{#gen{erule=ber},false} ->
+	    emit(["   Result = ",DecodeDisp,",",nl]),
+            result_line(NoOkWrapper, ["Result"]);
+
+
+	{#gen{erule=per},true} ->
+	    emit(["   {Result,Rest} = ",DecodeDisp,",",nl]),
+            result_line(NoOkWrapper, ["Result","Rest"]);
+	{#gen{erule=per},false} ->
+	    emit(["   {Result,_Rest} = ",DecodeDisp,",",nl]),
+            result_line(NoOkWrapper, ["Result"])
     end,
+
     case NoOkWrapper of
 	false ->
 	    emit([nl,try_catch(),nl,nl]);
 	true ->
-	    emit([nl,"end.",nl,nl])
+	    emit([".",nl,nl])
     end,
 
+    %% REST of MODULE
     gen_decode_partial_incomplete(Gen),
     gen_partial_inc_dispatcher(Gen),
 
@@ -787,7 +802,7 @@ pgen_dispatcher(Gen, Types) ->
     gen_dispatcher(Types, "decode_disp", "dec_").
 
 result_line(NoOkWrapper, Items) ->
-    S = ["    "|case NoOkWrapper of
+    S = ["   "|case NoOkWrapper of
 		    false -> result_line_1(["ok"|Items]);
 		    true -> result_line_1(Items)
 		end],
diff --git a/lib/asn1/src/asn1ct_gen_per.erl b/lib/asn1/src/asn1ct_gen_per.erl
index 82e9326294..c09b0f47d1 100644
--- a/lib/asn1/src/asn1ct_gen_per.erl
+++ b/lib/asn1/src/asn1ct_gen_per.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -47,14 +47,20 @@ dialyzer_suppressions(#gen{erule=per,aligned=Aligned}) ->
               false -> uper;
               true -> per
           end,
-    case asn1ct_func:is_used({Mod,complete,1}) of
+    suppress({Mod,complete,1}),
+    suppress({per_common,to_bitstring,2}),
+    emit(["    ok.",nl]).
+
+suppress({M,F,A}=MFA) ->
+    case asn1ct_func:is_used(MFA) of
 	false ->
 	    ok;
 	true ->
-	    emit(["    _ = complete(Arg),",nl])
-    end,
-    emit(["    ok.",nl]).
-
+	    Args =
+                [lists:concat(["element(",I,", Arg)"])
+                 || I <- lists:seq(1, A)],
+	    emit(["    ",{call,M,F,Args},com,nl])
+    end.
 
 gen_encode(Erules,Type) when is_record(Type,typedef) ->
     gen_encode_user(Erules,Type).
diff --git a/lib/asn1/test/asn1_SUITE.erl b/lib/asn1/test/asn1_SUITE.erl
index b98a704e28..bfeffa969f 100644
--- a/lib/asn1/test/asn1_SUITE.erl
+++ b/lib/asn1/test/asn1_SUITE.erl
@@ -1355,8 +1355,8 @@ xref_export_all(_Config) ->
         [] ->
             ok;
         [_|_] ->
-            S = [io_lib:format("~p:~p/~p\n", [M,F,A]) || {M,F,A} <- Unused],
-            io:format("There are unused functions:\n\n~s\n", [S]),
+            Msg = [io_lib:format("~p:~p/~p\n", [M,F,A]) || {M,F,A} <- Unused],
+            io:format("There are unused functions:\n\n~s\n", [Msg]),
             ?t:fail(unused_functions)
     end.
 
diff --git a/lib/asn1/vsn.mk b/lib/asn1/vsn.mk
index ef83b9e3dc..39dfe8f4fb 100644
--- a/lib/asn1/vsn.mk
+++ b/lib/asn1/vsn.mk
@@ -1 +1 @@
-ASN1_VSN = 5.0.3
+ASN1_VSN = 5.0.5
diff --git a/lib/common_test/doc/src/Makefile b/lib/common_test/doc/src/Makefile
index b60b04c4ae..293ef591cb 100644
--- a/lib/common_test/doc/src/Makefile
+++ b/lib/common_test/doc/src/Makefile
@@ -60,6 +60,7 @@ XML_REF6_FILES = common_test_app.xml
 XML_PART_FILES = part.xml
 
 XML_CHAPTER_FILES = \
+	introduction.xml \
 	basics_chapter.xml \
 	getting_started_chapter.xml \
 	install_chapter.xml \
@@ -74,8 +75,7 @@ XML_CHAPTER_FILES = \
 	event_handler_chapter.xml \
 	ct_hooks_chapter.xml \
 	dependencies_chapter.xml \
-	notes.xml \
-	notes_history.xml
+	notes.xml
 
 BOOK_FILES = book.xml
 
diff --git a/lib/common_test/doc/src/ct.xml b/lib/common_test/doc/src/ct.xml
index 1a3cfdb0c5..afd8741cd1 100644
--- a/lib/common_test/doc/src/ct.xml
+++ b/lib/common_test/doc/src/ct.xml
@@ -1060,6 +1060,42 @@
       </desc>
     </func>
 
+     <func>
+      <name>remaining_test_procs() -&gt; {TestProcs,SharedGL,OtherGLs}</name>
+      <fsummary>>This function will return the identity of test- and group
+       leader processes that are still running at the time of this call.</fsummary>
+      <type>
+        <v>TestProcs = [{pid(),GL}]</v>
+	<v>GL = pid()</v>
+        <v>SharedGL = pid()</v>
+        <v>OtherGLs = [pid()]</v>
+      </type>
+      <desc><marker id="remaining_test_procs-0"/>
+        <p>This function will return the identity of test- and group
+	leader processes that are still running at the time of this call.
+	<c>TestProcs</c> are processes in the system that have a Common Test IO
+	process as group leader. <c>SharedGL</c> is the central Common Test
+	IO process, responsible for printing to log files for configuration
+	functions and sequentially executing test cases. <c>OtherGLs</c> are
+	Common Test IO processes that print to log files for test cases
+	in parallel test case groups.</p>
+	<p>The process information returned by this function may be
+	used to locate and terminate remaining processes after tests have
+	finished executing. The function would typically by called from
+	Common Test Hook functions.</p>
+	<p>Note that processes that execute configuration functions or
+	test cases are never included in <c>TestProcs</c>. It is therefore safe
+	to use post configuration hook functions (such as post_end_per_suite,
+	post_end_per_group, post_end_per_testcase) to terminate all processes
+	in <c>TestProcs</c> that have the current group leader process as its group
+	leader.</p>
+	<p>Note also that the shared group leader (<c>SharedGL</c>) must never be
+	terminated by the user, only by Common Test. Group leader processes
+	for parallel test case groups (<c>OtherGLs</c>) may however be terminated
+	in post_end_per_group hook functions.</p>
+      </desc>
+    </func>   
+
     <func>
       <name>remove_config(Callback, Config) -&gt; ok</name>
       <fsummary>Removes configuration variables (together with
diff --git a/lib/common_test/doc/src/notes.xml b/lib/common_test/doc/src/notes.xml
index b039023e0f..7e909b24cd 100644
--- a/lib/common_test/doc/src/notes.xml
+++ b/lib/common_test/doc/src/notes.xml
@@ -33,6 +33,49 @@
     <file>notes.xml</file>
     </header>
 
+<section><title>Common_Test 1.15.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fixed problem with 'skip_groups' in combination with 'all
+	    suites' option in test specification.</p>
+          <p>
+	    Own Id: OTP-14953</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Common_Test 1.15.3</title>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    A new function, <c>ct:remaining_test_procs/0</c>, returns
+	    the identity of test- and group leader processes that are
+	    still running at the time of the call.</p>
+          <p>
+	    Own Id: OTP-13832</p>
+        </item>
+        <item>
+          <p>
+	    A "latest test result" link is now displayed in the
+	    footer of each test index page, which performs a jump to
+	    the most recently generated test index. This is useful
+	    for making quick comparisons of results between test runs
+	    without having to traverse the log file tree.</p>
+          <p>
+	    Own Id: OTP-14281</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Common_Test 1.15.2</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/common_test/src/common_test.app.src b/lib/common_test/src/common_test.app.src
index 0aa4aacf16..9becde110b 100644
--- a/lib/common_test/src/common_test.app.src
+++ b/lib/common_test/src/common_test.app.src
@@ -92,7 +92,7 @@
     "sasl-2.4.2",
     "snmp-5.1.2",
     "ssh-4.0",
-    "stdlib-3.4",
+    "stdlib-3.5",
     "syntax_tools-1.7",
     "tools-2.8",
     "xmerl-1.3.8"
diff --git a/lib/common_test/src/ct.erl b/lib/common_test/src/ct.erl
index 875301a8b2..fd7fa07b81 100644
--- a/lib/common_test/src/ct.erl
+++ b/lib/common_test/src/ct.erl
@@ -89,6 +89,8 @@
 -export([get_target_name/1]).
 -export([parse_table/1, listenv/1]).
 
+-export([remaining_test_procs/0]).
+
 %%----------------------------------------------------------------------
 %% Exported types
 %%----------------------------------------------------------------------
@@ -870,8 +872,8 @@ fail(Reason) ->
     try
 	exit({test_case_failed,Reason})
     catch
-	Class:R ->
-	    case erlang:get_stacktrace() of
+	Class:R:S ->
+	    case S of
 		[{?MODULE,fail,1,_}|Stk] -> ok;
 		Stk -> ok
 	    end,
@@ -892,8 +894,8 @@ fail(Format, Args) ->
 	    try
 		exit({test_case_failed,lists:flatten(Str)})
 	    catch
-		Class:R ->
-		    case erlang:get_stacktrace() of
+		Class:R:S ->
+		    case S of
 			[{?MODULE,fail,2,_}|Stk] -> ok;
 			Stk -> ok
 		    end,
@@ -1474,3 +1476,36 @@ continue() ->
 %%%      in order to let the test case proceed.</p>
 continue(TestCase) -> 
     test_server:continue(TestCase).
+
+
+%%%-----------------------------------------------------------------
+%%% @spec remaining_test_procs() -> {TestProcs,SharedGL,OtherGLs}
+%%%       TestProcs = [{pid(),GL}]
+%%%       GL = SharedGL = pid()
+%%%       OtherGLs = [pid()]
+%%%
+%%% @doc <p>This function will return the identity of test- and group
+%%%      leader processes that are still running at the time of this call.
+%%%      TestProcs are processes in the system that have a Common Test IO
+%%%      process as group leader. SharedGL is the central Common Test
+%%%      IO process, responsible for printing to log files for configuration
+%%%      functions and sequentially executing test cases. OtherGLs are
+%%%      Common Test IO processes that print to log files for test cases
+%%%      in parallel test case groups.</p>
+%%%      <p>The process information returned by this function may be
+%%%      used to locate and terminate remaining processes after tests have
+%%%      finished executing. The function would typically by called from
+%%%      Common Test Hook functions.</p>
+%%%      <p>Note that processes that execute configuration functions or
+%%%      test cases are never included in TestProcs. It is therefore safe
+%%%      to use post configuration hook functions (such as post_end_per_suite,
+%%%      post_end_per_group, post_end_per_testcase) to terminate all processes
+%%%      in TestProcs that have the current group leader process as its group
+%%%      leader.</p>
+%%%      <p>Note also that the shared group leader (SharedGL) must never be
+%%%      terminated by the user, only by Common Test. Group leader processes
+%%%      for parallel test case groups (OtherGLs) may however be terminated
+%%%      in post_end_per_group hook functions.</p>
+%%%      
+remaining_test_procs() ->
+    ct_util:remaining_test_procs().
diff --git a/lib/common_test/src/ct_config.erl b/lib/common_test/src/ct_config.erl
index b9d2155d58..e33b47b0e8 100644
--- a/lib/common_test/src/ct_config.erl
+++ b/lib/common_test/src/ct_config.erl
@@ -81,6 +81,7 @@ start(Mode) ->
 
 do_start(Parent) ->
     process_flag(trap_exit,true),
+    ct_util:mark_process(),
     register(ct_config_server,self()),
     ct_util:create_table(?attr_table,bag,#ct_conf.key),
     {ok,StartDir} = file:get_cwd(),
diff --git a/lib/common_test/src/ct_default_gl.erl b/lib/common_test/src/ct_default_gl.erl
index d1b52e5f4f..9ae430c546 100644
--- a/lib/common_test/src/ct_default_gl.erl
+++ b/lib/common_test/src/ct_default_gl.erl
@@ -55,6 +55,7 @@ stop() ->
 
 init([ParentGL]) ->
     register(?MODULE, self()),
+    ct_util:mark_process(),
     {ok,#{parent_gl_pid => ParentGL,
 	  parent_gl_monitor => erlang:monitor(process,ParentGL)}}.
 
diff --git a/lib/common_test/src/ct_event.erl b/lib/common_test/src/ct_event.erl
index 1a0ee4f3cd..8b5bba7600 100644
--- a/lib/common_test/src/ct_event.erl
+++ b/lib/common_test/src/ct_event.erl
@@ -137,6 +137,7 @@ is_alive() ->
 %% this function is called to initialize the event handler.
 %%--------------------------------------------------------------------
 init(RecvPids) ->
+    ct_util:mark_process(),
     %% RecvPids = [{RecvTag,Pid}]
     {ok,#state{receivers=RecvPids}}.
 
diff --git a/lib/common_test/src/ct_gen_conn.erl b/lib/common_test/src/ct_gen_conn.erl
index badb7c52ae..456bfd8bd1 100644
--- a/lib/common_test/src/ct_gen_conn.erl
+++ b/lib/common_test/src/ct_gen_conn.erl
@@ -186,9 +186,11 @@ end_log() ->
 do_within_time(Fun,Timeout) ->
     Self = self(),
     Silent = get(silent),
-    TmpPid = spawn_link(fun() -> put(silent,Silent),
-				 R = Fun(),
-				 Self ! {self(),R}
+    TmpPid = spawn_link(fun() -> 
+                                ct_util:mark_process(),
+                                put(silent,Silent),
+                                R = Fun(),
+                                Self ! {self(),R}
 			end),
     ConnPid = get(conn_pid),
     receive
@@ -301,6 +303,7 @@ return({To,Ref},Result) ->
 
 init_gen(Parent,Opts) ->
     process_flag(trap_exit,true),
+    ct_util:mark_process(),
     put(silent,false),
     try (Opts#gen_opts.callback):init(Opts#gen_opts.name,
 				      Opts#gen_opts.address,
diff --git a/lib/common_test/src/ct_hooks.erl b/lib/common_test/src/ct_hooks.erl
index f0592a40be..bb33f0243b 100644
--- a/lib/common_test/src/ct_hooks.erl
+++ b/lib/common_test/src/ct_hooks.erl
@@ -233,8 +233,7 @@ call([{Hook, call_id, NextFun} | Rest], Config, Meta, Hooks) ->
 		     Rest ++ [{NewId, call_init}, {NewId,NextFun}]}
 	    end,
 	call(resort(NewRest,NewHooks,Meta), Config, Meta, NewHooks)
-    catch Error:Reason ->
-	    Trace = erlang:get_stacktrace(),
+    catch Error:Reason:Trace ->
 	    ct_logs:log("Suite Hook","Failed to start a CTH: ~tp:~tp",
 			[Error,{Reason,Trace}]),
 	    call([], {fail,"Failed to start CTH"
@@ -422,8 +421,7 @@ catch_apply(M,F,A, Default, Fallback) ->
 catch_apply(M,F,A) ->
     try
         erlang:apply(M,F,A)
-    catch _:Reason ->
-            Trace = erlang:get_stacktrace(),
+    catch _:Reason:Trace ->
             ct_logs:log("Suite Hook","Call to CTH failed: ~w:~tp",
                             [error,{Reason,Trace}]),
             throw({error_in_cth_call,
diff --git a/lib/common_test/src/ct_hooks_lock.erl b/lib/common_test/src/ct_hooks_lock.erl
index fea298e535..a82be288e1 100644
--- a/lib/common_test/src/ct_hooks_lock.erl
+++ b/lib/common_test/src/ct_hooks_lock.erl
@@ -78,6 +78,7 @@ release() ->
 
 %% @doc Initiates the server
 init(Id) ->
+    ct_util:mark_process(),
     {ok, #state{ id = Id }}.
 
 %% @doc Handling call messages
diff --git a/lib/common_test/src/ct_logs.erl b/lib/common_test/src/ct_logs.erl
index 028c265420..9861b1e521 100644
--- a/lib/common_test/src/ct_logs.erl
+++ b/lib/common_test/src/ct_logs.erl
@@ -666,6 +666,7 @@ log_timestamp({MS,S,US}) ->
 
 logger(Parent, Mode, Verbosity) ->
     register(?MODULE,self()),
+    ct_util:mark_process(),
     %%! Below is a temporary workaround for the limitation of
     %%! max one test run per second. 
     %%! --->
@@ -1004,6 +1005,7 @@ print_to_log(async, FromPid, Category, TCGL, Content, EscChars, State) ->
 	if FromPid /= TCGL ->
 		IoFun = create_io_fun(FromPid, CtLogFd, EscChars),
 		fun() ->
+                        ct_util:mark_process(),
 			test_server:permit_io(TCGL, self()),
 
 			%% Since asynchronous io gets can get buffered if
@@ -1035,6 +1037,7 @@ print_to_log(async, FromPid, Category, TCGL, Content, EscChars, State) ->
 		end;
 	   true ->
 		fun() ->
+                        ct_util:mark_process(),
 			unexpected_io(FromPid, Category, ?MAX_IMPORTANCE,
 				      Content, CtLogFd, EscChars)
 		end
@@ -3002,6 +3005,7 @@ simulate() ->
     S = self(),
     Pid = spawn(fun() -> 
 			register(?MODULE,self()),
+                        ct_util:mark_process(),
 			S ! {self(),started},
 			simulate_logger_loop() 
 		end),
@@ -3129,8 +3133,8 @@ locate_priv_file(FileName) ->
 			filename:join(get(ct_run_dir), FileName);
 		    _ ->			
 			%% executed on other process than ct_logs
-			{ok,RunDir} = get_log_dir(true),
-			filename:join(RunDir, FileName)
+			{ok,LogDir} = get_log_dir(true),
+			filename:join(LogDir, FileName)
 		end,
 	    case filelib:is_file(PrivResultFile) of
 		true ->
@@ -3212,6 +3216,10 @@ get_ts_html_wrapper(TestName, Logdir, PrintLabel, Cwd, TableCols, Encoding) ->
 					  ?all_runs_name), Cwd),
     TestIndex = make_relative(filename:join(filename:dirname(CtLogdir),
 					    ?index_name), Cwd),
+    LatestTest = make_relative(filename:join(filename:dirname(CtLogdir),
+                                           ?suitelog_name++".latest.html"),
+                             Cwd),
+
     case Basic of
 	true ->
 	    TileFile = filename:join(filename:join(CTPath,"priv"),"tile1.jpg"),
@@ -3238,7 +3246,9 @@ get_ts_html_wrapper(TestName, Logdir, PrintLabel, Cwd, TableCols, Encoding) ->
 	      "<a href=\"", uri(AllRuns),
 	      "\">Test run history\n</a>  |  ",
 	      "<a href=\"", uri(TestIndex),
-	      "\">Top level test index\n</a>\n</p>\n",
+	      "\">Top level test index\n</a>  |  ",
+	      "<a href=\"", uri(LatestTest),
+              "\">Latest test result</a>\n</p>\n",
 	      Copyright,"</center>\n</body>\n</html>\n"]};
 	_ ->
 	    Copyright = 
@@ -3285,7 +3295,9 @@ get_ts_html_wrapper(TestName, Logdir, PrintLabel, Cwd, TableCols, Encoding) ->
 	      "<a href=\"", uri(AllRuns),
 	      "\">Test run history\n</a>  |  ",
 	      "<a href=\"", uri(TestIndex),
-	      "\">Top level test index\n</a>\n</p>\n",
+	      "\">Top level test index\n</a>  |  ",
+	      "<a href=\"", uri(LatestTest),
+              "\">Latest test result</a>\n</p>\n",
 	      Copyright,"</center>\n</body>\n</html>\n"]}
     end.
 
diff --git a/lib/common_test/src/ct_master.erl b/lib/common_test/src/ct_master.erl
index 44d3fb8f64..e2ea525cdd 100644
--- a/lib/common_test/src/ct_master.erl
+++ b/lib/common_test/src/ct_master.erl
@@ -346,6 +346,7 @@ init_master(Parent,NodeOptsList,EvHandlers,MasterLogDir,LogDirs,
     case whereis(ct_master) of
 	undefined ->
 	    register(ct_master,self()),
+            ct_util:mark_process(),
 	    ok;
 	_Pid ->
 	    io:format("~nWarning: ct_master already running!~n"),
@@ -690,6 +691,7 @@ refresh_logs([],Refreshed) ->
 init_node_ctrl(MasterPid,Cookie,Opts) ->
     %% make sure tests proceed even if connection to master is lost
     process_flag(trap_exit, true),
+    ct_util:mark_process(),
     MasterNode = node(MasterPid),
     group_leader(whereis(user),self()),
     io:format("~n********** node_ctrl process ~w started on ~w **********~n",
diff --git a/lib/common_test/src/ct_master_event.erl b/lib/common_test/src/ct_master_event.erl
index d535d1274e..bd4d1efc92 100644
--- a/lib/common_test/src/ct_master_event.erl
+++ b/lib/common_test/src/ct_master_event.erl
@@ -116,6 +116,7 @@ sync_notify(Event) ->
 %% this function is called to initialize the event handler.
 %%--------------------------------------------------------------------
 init(_) ->
+    ct_util:mark_process(),
     ct_master_logs:log("CT Master Event Handler started","",[]),
     {ok,#state{}}.
 
diff --git a/lib/common_test/src/ct_master_logs.erl b/lib/common_test/src/ct_master_logs.erl
index fd92f73f63..1308720823 100644
--- a/lib/common_test/src/ct_master_logs.erl
+++ b/lib/common_test/src/ct_master_logs.erl
@@ -88,6 +88,7 @@ stop() ->
 
 init(Parent,LogDir,Nodes) ->
     register(?MODULE,self()),
+    ct_util:mark_process(),
     Time = calendar:local_time(),
     RunDir = make_dirname(Time),
     RunDirAbs = filename:join(LogDir,RunDir),
diff --git a/lib/common_test/src/ct_repeat.erl b/lib/common_test/src/ct_repeat.erl
index c043c9846c..177ef37d1f 100644
--- a/lib/common_test/src/ct_repeat.erl
+++ b/lib/common_test/src/ct_repeat.erl
@@ -70,6 +70,7 @@ loop_test(If,Args) when is_list(Args) ->
 				    CtrlPid = self(),
 				    spawn(
 				      fun() ->
+                                              ct_util:mark_process(),
 					      stop_after(CtrlPid,Secs,ForceStop)
 				      end)
 			    end,
@@ -134,6 +135,7 @@ spawn_tester(script,Ctrl,Args) ->
 
 spawn_tester(func,Ctrl,Opts) ->
     Tester = fun() ->
+                     ct_util:mark_process(),
 		     case catch ct_run:run_test2(Opts) of
 			 {'EXIT',Reason} ->
 			     exit(Reason);
diff --git a/lib/common_test/src/ct_run.erl b/lib/common_test/src/ct_run.erl
index 9436236719..afc5fee4f7 100644
--- a/lib/common_test/src/ct_run.erl
+++ b/lib/common_test/src/ct_run.erl
@@ -250,6 +250,8 @@ finish(Tracing, ExitStatus, Args) ->
     end.
 
 script_start1(Parent, Args) ->
+    %% tag this process
+    ct_util:mark_process(),
     %% read general start flags
     Label = get_start_opt(label, fun([Lbl]) -> Lbl end, Args),
     Profile = get_start_opt(profile, fun([Prof]) -> Prof end, Args),
@@ -440,11 +442,9 @@ script_start2(Opts = #opts{vts = undefined,
                 TestSpecData ->
 		    execute_all_specs(TestSpecData, Opts, Args, [])
             catch
-                throw:{error,Reason} ->
-		    StackTrace = erlang:get_stacktrace(),
+                throw:{error,Reason}:StackTrace ->
 		    {error,{invalid_testspec,{Reason,StackTrace}}};
-                _:Reason ->
-		    StackTrace = erlang:get_stacktrace(),
+                _:Reason:StackTrace ->
 		    {error,{invalid_testspec,{Reason,StackTrace}}}
             end;
 	[] ->
@@ -956,7 +956,10 @@ run_test(StartOpts) when is_list(StartOpts) ->
 -spec run_test1_fun(_) -> fun(() -> no_return()).
 
 run_test1_fun(StartOpts) ->
-    fun() -> run_test1(StartOpts) end.
+    fun() -> 
+            ct_util:mark_process(),
+            run_test1(StartOpts)
+    end.
 
 run_test1(StartOpts) when is_list(StartOpts) ->
     case proplists:get_value(refresh_logs, StartOpts) of
@@ -1206,11 +1209,9 @@ run_spec_file(Relaxed,
 	TestSpecData ->
 	    run_all_specs(TestSpecData, Opts, StartOpts, [])
     catch
-	throw:{error,CTReason} ->
-	    StackTrace = erlang:get_stacktrace(),
+	throw:{error,CTReason}:StackTrace ->
 	    exit({error,{invalid_testspec,{CTReason,StackTrace}}});
-	_:CTReason ->
-	    StackTrace = erlang:get_stacktrace(),
+	_:CTReason:StackTrace ->
 	    exit({error,{invalid_testspec,{CTReason,StackTrace}}})
     end.
 
@@ -1447,7 +1448,10 @@ run_testspec(TestSpec) ->
 -spec run_testspec1_fun(_) -> fun(() -> no_return()).
 
 run_testspec1_fun(TestSpec) ->
-    fun() -> run_testspec1(TestSpec) end.
+    fun() -> 
+            ct_util:mark_process(),
+            run_testspec1(TestSpec)
+    end.
 
 run_testspec1(TestSpec) ->
     {ok,Cwd} = file:get_cwd(),
@@ -1906,10 +1910,12 @@ possibly_spawn(true, Tests, Skip, Opts) ->
     CTUtilSrv = whereis(ct_util_server),
     Supervisor = 
 	fun() ->
+                ct_util:mark_process(),
 		process_flag(trap_exit, true),
 		link(CTUtilSrv),
 		TestRun =
 		    fun() ->
+                            ct_util:mark_process(),
 			    TestResult = (catch do_run_test(Tests, Skip, Opts)),
 			    case TestResult of
 				{EType,_} = Error when EType == user_error;
diff --git a/lib/common_test/src/ct_slave.erl b/lib/common_test/src/ct_slave.erl
index 61e6446df8..0c16ad5980 100644
--- a/lib/common_test/src/ct_slave.erl
+++ b/lib/common_test/src/ct_slave.erl
@@ -318,6 +318,7 @@ monitor_master(MasterNode) ->
 
 % code of the masterdeath-waiter process
 monitor_master_int(MasterNode) ->
+    ct_util:mark_process(),
     erlang:monitor_node(MasterNode, true),
     receive
         {nodedown, MasterNode}->
diff --git a/lib/common_test/src/ct_telnet_client.erl b/lib/common_test/src/ct_telnet_client.erl
index c8d217cd2a..76e4b9ea70 100644
--- a/lib/common_test/src/ct_telnet_client.erl
+++ b/lib/common_test/src/ct_telnet_client.erl
@@ -118,6 +118,7 @@ get_data(Pid) ->
 %%%-----------------------------------------------------------------
 %%% Internal functions
 init(Parent, Server, Port, Timeout, KeepAlive, NoDelay, ConnName) ->
+    ct_util:mark_process(),
     case gen_tcp:connect(Server, Port, [list,{packet,0},{nodelay,NoDelay}], Timeout) of
 	{ok,Sock} ->
 	    dbg("~tp connected to: ~tp (port: ~w, keep_alive: ~w)\n",
diff --git a/lib/common_test/src/ct_testspec.erl b/lib/common_test/src/ct_testspec.erl
index bb445bb0d2..bd3755722f 100644
--- a/lib/common_test/src/ct_testspec.erl
+++ b/lib/common_test/src/ct_testspec.erl
@@ -1425,7 +1425,12 @@ skip_groups1(Suite,Groups,Cmt,Suites0) ->
 	    GrAndCases1 = GrAndCases0 ++ SkipGroups,
 	    insert_in_order({Suite,GrAndCases1},Suites0,replace);
 	false ->
-	    insert_in_order({Suite,SkipGroups},Suites0,replace)
+	    case Suites0 of
+		[{all,_}=All|Skips]->
+		    [All|Skips++[{Suite,SkipGroups}]];
+                _ ->
+                    insert_in_order({Suite,SkipGroups},Suites0,replace)
+            end
     end.
 
 skip_cases(Node,Dir,Suite,Cases,Cmt,Tests,false) when is_list(Cases) ->
diff --git a/lib/common_test/src/ct_util.erl b/lib/common_test/src/ct_util.erl
index 3c0fead5b2..e904bb1e7c 100644
--- a/lib/common_test/src/ct_util.erl
+++ b/lib/common_test/src/ct_util.erl
@@ -65,6 +65,9 @@
 
 -export([warn_duplicates/1]).
 
+-export([mark_process/0, mark_process/1, is_marked/1, is_marked/2,
+         remaining_test_procs/0]).
+
 -export([get_profile_data/0, get_profile_data/1,
 	 get_profile_data/2, open_url/3]).
 
@@ -126,6 +129,7 @@ start(Mode, LogDir, Verbosity) ->
 do_start(Parent, Mode, LogDir, Verbosity) ->
     process_flag(trap_exit,true),
     register(ct_util_server,self()),
+    mark_process(),
     create_table(?conn_table,#conn.handle),
     create_table(?board_table,2),
     create_table(?suite_table,#suite_data.key),
@@ -205,11 +209,10 @@ do_start(Parent, Mode, LogDir, Verbosity) ->
 	    self() ! {{stop,{self(),{user_error,CTHReason}}},
 		      {Parent,make_ref()}}
     catch
-	_:CTHReason ->
+	_:CTHReason:StackTrace ->
 	    ErrorInfo = if is_atom(CTHReason) ->
 				io_lib:format("{~tp,~tp}",
-					      [CTHReason,
-					       erlang:get_stacktrace()]);
+					      [CTHReason, StackTrace]);
 			   true ->
 				CTHReason
 			end,
@@ -934,6 +937,70 @@ warn_duplicates(Suites) ->
 %%% @spec
 %%%
 %%% @doc
+mark_process() ->
+    mark_process(system).
+
+mark_process(Type) ->
+    put(ct_process_type, Type).
+
+is_marked(Pid) ->
+    is_marked(Pid, system).
+
+is_marked(Pid, Type) ->
+    case process_info(Pid, dictionary) of
+        {dictionary,List} ->
+            Type == proplists:get_value(ct_process_type, List);
+        undefined ->
+            false
+    end.
+
+remaining_test_procs() ->
+    Procs = processes(),
+    {SharedGL,OtherGLs,Procs2} =
+        lists:foldl(
+          fun(Pid, ProcTypes = {Shared,Other,Procs1}) ->
+                  case is_marked(Pid, group_leader) of
+                      true ->
+                          if not is_pid(Shared) ->
+                                  case test_server_io:get_gl(true) of
+                                      Pid ->
+                                          {Pid,Other,
+                                           lists:delete(Pid,Procs1)};
+                                      _ ->
+                                          {Shared,[Pid|Other],Procs1}
+                                  end;
+                             true ->          % SharedGL already found
+                                  {Shared,[Pid|Other],Procs1}
+                          end;
+                      false ->
+                          case is_marked(Pid) of
+                              true ->
+                                  {Shared,Other,lists:delete(Pid,Procs1)};
+                              false ->
+                                  ProcTypes
+                          end
+                  end
+          end, {undefined,[],Procs}, Procs),
+
+    AllGLs = [SharedGL | OtherGLs],
+    TestProcs =
+        lists:flatmap(fun(Pid) ->
+                              case process_info(Pid, group_leader) of
+                                  {group_leader,GL} ->
+                                      case lists:member(GL, AllGLs) of
+                                          true  -> [{Pid,GL}];
+                                          false -> []
+                                      end;
+                                  undefined ->
+                                      []
+                              end
+                      end, Procs2),
+    {TestProcs, SharedGL, OtherGLs}.
+
+%%%-----------------------------------------------------------------
+%%% @spec
+%%%
+%%% @doc
 get_profile_data() ->
     get_profile_data(all).
 
diff --git a/lib/common_test/src/ct_webtool.erl b/lib/common_test/src/ct_webtool.erl
index 9016aca899..c7174b13f5 100644
--- a/lib/common_test/src/ct_webtool.erl
+++ b/lib/common_test/src/ct_webtool.erl
@@ -343,6 +343,7 @@ code_change(_,State,_)->
 % Start the gen_server
 %----------------------------------------------------------------------
 init({Path,Config})->
+    ct_util:mark_process(),
     case filelib:is_dir(Path) of
 	true ->
 	    {ok, Table} = get_tool_files_data(),
@@ -770,7 +771,7 @@ fill_out(Nr)->
 %Controls whether the user selected a tool to start
 %----------------------------------------------------------------------
 get_tools(Input)->
-    case httpd:parse_query(Input) of
+    case uri_string:dissect_query(Input) of
 	[]->
 	    no_tools;
 	 Tools->
diff --git a/lib/common_test/src/ct_webtool_sup.erl b/lib/common_test/src/ct_webtool_sup.erl
index c02ec69d04..6c6dbde0a6 100644
--- a/lib/common_test/src/ct_webtool_sup.erl
+++ b/lib/common_test/src/ct_webtool_sup.erl
@@ -46,6 +46,7 @@ stop(Pid)->
 %%          {error, Reason}   
 %%----------------------------------------------------------------------
 init(_StartArgs) ->
+    ct_util:mark_process(),
     %%Child1 = 
     %%Child2 ={webcover_backend,{webcover_backend,start_link,[]},permanent,2000,worker,[webcover_backend]},
     %%{ok,{{simple_one_for_one,5,10},[Child1]}}.
diff --git a/lib/common_test/src/cth_log_redirect.erl b/lib/common_test/src/cth_log_redirect.erl
index 8b29d0f96d..b05f0bd28b 100644
--- a/lib/common_test/src/cth_log_redirect.erl
+++ b/lib/common_test/src/cth_log_redirect.erl
@@ -56,6 +56,7 @@ id(_Opts) ->
     ?MODULE.
 
 init(?MODULE, _Opts) ->
+    ct_util:mark_process(),
     error_logger:add_report_handler(?MODULE),
     tc_log_async.
 
@@ -121,8 +122,8 @@ handle_event({_Type,GL,_Msg}, #eh_state{handle_remote_events = false} = State)
   when node(GL) /= node() ->
     {ok, State};
 handle_event(Event, #eh_state{log_func = LogFunc} = State) ->
-    case lists:keyfind(sasl, 1, application:which_applications()) of
-	false ->
+    case whereis(sasl_sup) of
+	undefined ->
 	    sasl_not_started;
 	_Else ->
 	    {ok, ErrLogType} = application:get_env(sasl, errlog_type),
diff --git a/lib/common_test/src/test_server.erl b/lib/common_test/src/test_server.erl
index 35a73e6d2e..9469619aa9 100644
--- a/lib/common_test/src/test_server.erl
+++ b/lib/common_test/src/test_server.erl
@@ -415,6 +415,7 @@ run_test_case_apply(Mod, Func, Args, Name, RunInit, TimetrapData) ->
     St = #st{ref=Ref,pid=Pid,mf={Mod,Func},last_known_loc=unknown,
 	     status=starting,ret_val=[],comment="",timeout=infinity,
 	     config=hd(Args)},
+    ct_util:mark_process(),
     run_test_case_msgloop(St).
 
 %% Ugly bug (pre R5A):
@@ -785,6 +786,7 @@ spawn_fw_call(Mod,IPTC={init_per_testcase,Func},CurrConf,Pid,
 	      Why,Loc,SendTo) ->
     FwCall =
 	fun() ->
+                ct_util:mark_process(),
 		Skip = {skip,{failed,{Mod,init_per_testcase,Why}}},
 		%% if init_per_testcase fails, the test case
 		%% should be skipped
@@ -815,6 +817,7 @@ spawn_fw_call(Mod,EPTC={end_per_testcase,Func},EndConf,Pid,
 	      Why,_Loc,SendTo) ->
     FwCall =
 	fun() ->
+                ct_util:mark_process(),
 		{RetVal,Report} =
 		    case proplists:get_value(tc_status, EndConf) of
 			undefined ->
@@ -864,6 +867,7 @@ spawn_fw_call(Mod,EPTC={end_per_testcase,Func},EndConf,Pid,
 spawn_fw_call(FwMod,FwFunc,_,_Pid,{framework_error,FwError},_,SendTo) ->
     FwCall =
 	fun() ->
+                ct_util:mark_process(),
 		test_server_sup:framework_call(report, [framework_error,
 							{{FwMod,FwFunc},
 							 FwError}]),
@@ -880,6 +884,7 @@ spawn_fw_call(FwMod,FwFunc,_,_Pid,{framework_error,FwError},_,SendTo) ->
     spawn_link(FwCall);
 
 spawn_fw_call(Mod,Func,CurrConf,Pid,Error,Loc,SendTo) ->
+    ct_util:mark_process(),
     {Func1,EndTCFunc} = case Func of
 			    CF when CF == init_per_suite; CF == end_per_suite;
 				    CF == init_per_group; CF == end_per_group ->
@@ -918,6 +923,7 @@ start_job_proxy() ->
 
 %% The io_reply_proxy is not the most satisfying solution but it works...
 io_reply_proxy(ReplyTo) ->
+    ct_util:mark_process(),
     receive
 	IoReply when is_tuple(IoReply),
 		     element(1, IoReply) == io_reply ->
@@ -927,6 +933,7 @@ io_reply_proxy(ReplyTo) ->
     end.
 
 job_proxy_msgloop() ->
+    ct_util:mark_process(),
     receive
 
 	%%
@@ -1333,13 +1340,12 @@ do_init_per_testcase(Mod, Args) ->
 	    {skip,Reason};
 	exit:{Skip,Reason} when Skip =:= skip; Skip =:= skipped ->
 	    {skip,Reason};
-	throw:Other ->
-	    set_loc(erlang:get_stacktrace()),
+	throw:Other:Stk ->
+	    set_loc(Stk),
 	    Line = get_loc(),
 	    print_init_conf_result(Line,"thrown",Other),
 	    {skip,{failed,{Mod,init_per_testcase,Other}}};
-	_:Reason0 ->
-	    Stk = erlang:get_stacktrace(),
+	_:Reason0:Stk ->
 	    Reason = {Reason0,Stk},
 	    set_loc(Stk),
 	    Line = get_loc(),
@@ -1388,20 +1394,19 @@ do_end_per_testcase(Mod,EndFunc,Func,Conf) ->
 	_ ->
 	    ok
     catch
-	throw:Other ->
+	throw:Other:Stk ->
 	    Comment0 = case read_comment() of
 			   ""  -> "";
 			   Cmt -> Cmt ++ test_server_ctrl:xhtml("<br>",
 								"<br />")
 		       end,
-	    set_loc(erlang:get_stacktrace()),
+	    set_loc(Stk),
 	    comment(io_lib:format("~ts<font color=\"red\">"
 				  "WARNING: ~w thrown!"
 				  "</font>\n",[Comment0,EndFunc])),
 	    print_end_tc_warning(EndFunc,Other,"thrown",get_loc()),
 	    {failed,{Mod,end_per_testcase,Other}};
-	  Class:Reason ->
-	    Stk = erlang:get_stacktrace(),
+	  Class:Reason:Stk ->
 	    set_loc(Stk),
 	    Why = case Class of
 		      exit -> {'EXIT',Reason};
@@ -1543,8 +1548,7 @@ ts_tc(M, F, A) ->
 		 throw:{skipped, Reason} -> {skip, Reason};
 		 exit:{skip, Reason} -> {skip, Reason};
 		 exit:{skipped, Reason} -> {skip, Reason};
-		 Type:Reason ->
-		     Stk = erlang:get_stacktrace(),
+		 Type:Reason:Stk ->
 		     set_loc(Stk),
 		     case Type of
 			 throw ->
@@ -1733,8 +1737,8 @@ fail(Reason) ->
     try
 	exit({suite_failed,Reason})
     catch
-	Class:R ->
-	    case erlang:get_stacktrace() of
+	Class:R:Stacktrace ->
+	    case Stacktrace of
 		[{?MODULE,fail,1,_}|Stk] -> ok;
 		Stk -> ok
 	    end,
@@ -1756,8 +1760,8 @@ fail() ->
     try
 	exit(suite_failed)
     catch
-	Class:R ->
-	    case erlang:get_stacktrace() of
+	Class:R:Stacktrace ->
+	    case Stacktrace of
 		[{?MODULE,fail,0,_}|Stk] -> ok;
 		Stk -> ok
 	    end,
@@ -1804,6 +1808,7 @@ break(CBM, TestCase, Comment) ->
 spawn_break_process(Pid, PName) ->
     spawn(fun() ->
 		  register(PName, self()),
+                  ct_util:mark_process(),
 		  receive
 		      continue -> continue(Pid);
 		      cancel -> ok
@@ -2001,6 +2006,7 @@ time_ms_apply(Func, TCPid, MultAndScale) ->
 
 user_timetrap_supervisor(Func, Spawner, TCPid, GL, T0, MultAndScale) ->
     process_flag(trap_exit, true),
+    ct_util:mark_process(),
     Spawner ! {self(),infinity},
     MonRef = monitor(process, TCPid),
     UserTTSup = self(),
@@ -2034,15 +2040,15 @@ call_user_timetrap(Func, Sup) when is_function(Func) ->
     try Func() of
 	Result -> 
 	    Sup ! {self(),Result}
-    catch _:Error ->
-	    exit({Error,erlang:get_stacktrace()})
+    catch _:Error:Stk ->
+	    exit({Error,Stk})
     end;
 call_user_timetrap({M,F,A}, Sup) ->
     try apply(M,F,A) of
 	Result -> 
 	    Sup ! {self(),Result}
-    catch _:Error ->
-	    exit({Error,erlang:get_stacktrace()})
+    catch _:Error:Stk ->
+	    exit({Error,Stk})
     end.
 
 save_user_timetrap(TCPid, UserTTSup, StartTime) ->
@@ -2571,6 +2577,7 @@ run_on_shielded_node(Fun, CArgs) when is_function(Fun), is_list(CArgs) ->
 -spec start_job_proxy_fun(_, _) -> fun(() -> no_return()).
 start_job_proxy_fun(Master, Fun) ->
     fun () ->
+            ct_util:mark_process(),
             _ = start_job_proxy(),
             receive
                 Ref ->
diff --git a/lib/common_test/src/test_server_ctrl.erl b/lib/common_test/src/test_server_ctrl.erl
index c70ea4ef9d..1ae6c8c7c7 100644
--- a/lib/common_test/src/test_server_ctrl.erl
+++ b/lib/common_test/src/test_server_ctrl.erl
@@ -89,6 +89,7 @@
 -define(logdir_ext, ".logs").
 -define(data_dir_suffix, "_data/").
 -define(suitelog_name, "suite.log").
+-define(suitelog_latest_name, "suite.log.latest").
 -define(coverlog_name, "cover.html").
 -define(raw_coverlog_name, "cover.log").
 -define(cross_coverlog_name, "cross_cover.html").
@@ -1126,6 +1127,7 @@ init_tester(Mod, Func, Args, Dir, Name, {_,_,MinLev}=Levels,
 	    RejectIoReqs, CreatePrivDir, TCCallback, ExtraTools) ->
     process_flag(trap_exit, true),
     _ = test_server_io:start_link(),
+    put(app, common_test),
     put(test_server_name, Name),
     put(test_server_dir, Dir),
     put(test_server_total_time, 0),
@@ -1150,6 +1152,12 @@ init_tester(Mod, Func, Args, Dir, Name, {_,_,MinLev}=Levels,
     end,
 
     %% before first print, read and set logging options
+    FWLogDir =
+        case test_server_sup:framework_call(get_log_dir, [], []) of
+            {ok,FwDir} -> FwDir;
+            _          -> filename:dirname(Dir)
+        end,
+    put(test_server_framework_logdir, FWLogDir),
     LogOpts = test_server_sup:framework_call(get_logopts, [], []),
     put(test_server_logopts, LogOpts),
 
@@ -1712,6 +1720,12 @@ start_log_file() ->
     test_server_io:set_fd(html, Html),
     test_server_io:set_fd(unexpected_io, Unexpected),
 
+    %% we must assume the redirection file (to the latest suite index) can
+    %% be stored on the level above the log directory of the current test
+    TopDir = filename:dirname(get(test_server_framework_logdir)),
+    RedirectLink = filename:join(TopDir, ?suitelog_latest_name ++ ?html_ext),
+    make_html_link(RedirectLink, HtmlName, redirect),
+
     make_html_link(filename:absname(?last_test ++ ?html_ext),
 		   HtmlName, filename:basename(Dir)),
     LinkName = filename:join(Dir, ?last_link),
@@ -1740,11 +1754,18 @@ make_html_link(LinkName, Target, Explanation) ->
 	       false ->
 		   "file:" ++ uri_encode(Target)
 	   end,
-    H = [html_header(Explanation),
-	 "<h1>Last test</h1>\n"
-	 "<a href=\"",Href,"\">",Explanation,"</a>\n"
-	 "</body>\n</html>\n"],
+    H = if Explanation == redirect ->
+                Meta = ["<meta http-equiv=\"refresh\" "
+                        "content=\"0; url=", Href, "\" />\n"],
+                [html_header("redirect", Meta), "</html>\n"];
+           true ->
+                [html_header(Explanation),
+                 "<h1>Last test</h1>\n"
+                 "<a href=\"",Href,"\">",Explanation,"</a>\n"
+                 "</body>\n</html>\n"]
+        end,
     ok = write_html_file(LinkName, H).
+    
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% start_minor_log_file(Mod, Func, ParallelTC) -> AbsName
@@ -2280,7 +2301,7 @@ run_test_cases(TestSpec, Config, TimetrapData) ->
 %% test_server_io:print_buffered/1 to print the data. To help with this,
 %% two variables in the process dictionary are used:
 %% 'test_server_common_io_handler' and 'test_server_queued_io'. The values
-%% are set to as follwing:
+%% are set to as following:
 %%
 %%   Value	Meaning
 %%   -----     -------
@@ -3705,6 +3726,7 @@ run_test_case(Ref, Num, Mod, Func, Args, RunInit, TimetrapData, Mode) ->
 	    spawn_link(
 	      fun() ->
 		      process_flag(trap_exit, true),
+                      ct_util:mark_process(),
 		      _ = [put(Key, Val) || {Key,Val} <- Dictionary],
 		      set_io_buffering({tc,Main}),
 		      run_test_case1(Ref, Num, Mod, Func, Args, RunInit,
@@ -5145,7 +5167,7 @@ display_info([Pid|T], R, M) ->
 			   Other
 		   end,
 	    Reds  = fetch(reductions, Info),
-	    LM = length(fetch(messages, Info)),
+	    LM = fetch(message_queue_len, Info),
 	    pformat(io_lib:format("~w", [Pid]),
 		    io_lib:format("~tw", [Call]),
 		    io_lib:format("~tw", [Curr]), Reds, LM),
@@ -5658,6 +5680,13 @@ html_header(Title) ->
      "<body bgcolor=\"white\" text=\"black\" "
      "link=\"blue\" vlink=\"purple\" alink=\"red\">\n"].
 
+html_header(Title, Meta) ->
+    ["<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\">\n"
+     "<!-- autogenerated by '", atom_to_list(?MODULE), "'. -->\n"
+     "<html>\n"
+     "<head>\n"
+     "<title>", Title, "</title>\n"] ++ Meta ++ ["</head>\n"].
+
 open_html_file(File) ->
     open_utf8_file(File).
 
@@ -5710,7 +5739,7 @@ uri_encode_comp([Char|Chars],Encoding) ->
     Reserved = sets:is_element(Char, reserved()),
     case (Char>127 andalso Encoding==latin1) orelse Reserved of
 	true ->
-	    [ $% | http_util:integer_to_hexlist(Char)] ++
+	    [ $% | integer_to_list(Char, 16)] ++
 		uri_encode_comp(Chars,Encoding);
 	false ->
 	    [Char | uri_encode_comp(Chars,Encoding)]
diff --git a/lib/common_test/src/test_server_gl.erl b/lib/common_test/src/test_server_gl.erl
index ce7682d101..24dd5cd54c 100644
--- a/lib/common_test/src/test_server_gl.erl
+++ b/lib/common_test/src/test_server_gl.erl
@@ -132,6 +132,7 @@ set_props(GL, PropList) ->
 %%% Internal functions.
 
 init([TSIO]) ->
+    ct_util:mark_process(group_leader),
     EscChars = case application:get_env(test_server, esc_chars) of
 		   {ok,ECBool} -> ECBool;
 		   _           -> true
diff --git a/lib/common_test/src/test_server_io.erl b/lib/common_test/src/test_server_io.erl
index 062e3bd8ff..ef31521950 100644
--- a/lib/common_test/src/test_server_io.erl
+++ b/lib/common_test/src/test_server_io.erl
@@ -184,6 +184,7 @@ reset_state() ->
 
 init([]) ->
     process_flag(trap_exit, true),
+    ct_util:mark_process(),
     Empty = gb_trees:empty(),
     {ok,Shared} = test_server_gl:start_link(self()),
     {ok,#st{fds=Empty,shared_gl=Shared,gls=gb_sets:empty(),
@@ -262,7 +263,7 @@ handle_call(reset_state, From, #st{phase=stopping,pending_ops=Ops}=St) ->
 		 {Result,NewSt1}
 	 end,
     {noreply,St#st{pending_ops=[{From,Op}|Ops]}};
-handle_call(reset_state, _From, #st{fds=Fds,tags=Tags,gls=Gls,
+handle_call(reset_state, _From, #st{fds=Fds,tags=Tags,shared_gl=Shared0,gls=Gls,
 				    offline_buffer=OfflineBuff}) ->
     %% close open log files
     lists:foreach(fun(Tag) ->
@@ -273,6 +274,7 @@ handle_call(reset_state, _From, #st{fds=Fds,tags=Tags,gls=Gls,
 				  file:close(Fd)
 			  end
 		  end, Tags),
+    test_server_gl:stop(Shared0),
     GlList = gb_sets:to_list(Gls),
     _ = [test_server_gl:stop(GL) || GL <- GlList],
     timer:sleep(100),
@@ -320,7 +322,7 @@ handle_call(finish, From, St) ->
 
 handle_info({'EXIT',Pid,normal}, #st{gls=Gls0,stopping=From}=St) ->
     Gls = gb_sets:delete_any(Pid, Gls0),
-    case gb_sets:is_empty(Gls) andalso stopping =/= undefined of
+    case gb_sets:is_empty(Gls) andalso From =/= undefined of
 	true ->
 	    %% No more group leaders left.
 	    gen_server:reply(From, ok),
@@ -329,6 +331,9 @@ handle_info({'EXIT',Pid,normal}, #st{gls=Gls0,stopping=From}=St) ->
 	    %% Wait for more group leaders to finish.
 	    {noreply,St#st{gls=Gls,phase=stopping}}
     end;
+handle_info({'EXIT',Pid,killed}, #st{gls=Gls0}=St) ->
+    %% forced termination of group leader
+    {noreply,St#st{gls=gb_sets:delete_any(Pid, Gls0)}};
 handle_info({'EXIT',_Pid,Reason}, _St) ->
     exit(Reason);
 handle_info(stop_group_leaders, #st{gls=Gls}=St) ->
diff --git a/lib/common_test/src/test_server_node.erl b/lib/common_test/src/test_server_node.erl
index f0f9cea6e0..b2d4f199c3 100644
--- a/lib/common_test/src/test_server_node.erl
+++ b/lib/common_test/src/test_server_node.erl
@@ -749,6 +749,7 @@ unpack(Bin) ->
 id(I) -> I.
    
 print_data(Port) ->
+    ct_util:mark_process(),
     receive
 	{Port, {data, Bytes}} ->
 	    io:put_chars(Bytes),
diff --git a/lib/common_test/src/test_server_sup.erl b/lib/common_test/src/test_server_sup.erl
index 21f4be22fe..139621141d 100644
--- a/lib/common_test/src/test_server_sup.erl
+++ b/lib/common_test/src/test_server_sup.erl
@@ -56,6 +56,7 @@ timetrap(Timeout0, Scale, Pid) ->
 
 timetrap(Timeout0, ReportTVal, Scale, Pid) ->
     process_flag(priority, max),
+    ct_util:mark_process(),
     Timeout = if not Scale -> Timeout0;
 		 true -> test_server:timetrap_scale_factor() * Timeout0
 	      end,
@@ -773,14 +774,15 @@ framework_call(Callback,Func,Args,DefaultReturn) ->
 		false ->
 		    ok
 	    end,
+            ct_util:mark_process(),
 	    try apply(Mod,Func,Args) of
 		Result ->
 		    Result
 	    catch
 		exit:Why ->
 		    EH(Why);
-		error:Why ->
-		    EH({Why,erlang:get_stacktrace()});
+		error:Why:Stacktrace ->
+		    EH({Why,Stacktrace});
 		throw:Why ->
 		    EH(Why)
 	    end;
@@ -850,6 +852,7 @@ util_start() ->
 	undefined ->	
 	    spawn_link(fun() ->
 			       register(?MODULE, self()),
+                               put(app, common_test),
 			       util_loop(#util_state{starter=Starter})
 		       end),
 	    ok;
diff --git a/lib/common_test/src/vts.erl b/lib/common_test/src/vts.erl
index 99a109cfe8..2bf3e82ade 100644
--- a/lib/common_test/src/vts.erl
+++ b/lib/common_test/src/vts.erl
@@ -157,6 +157,7 @@ test_info(_VtsPid,Type,Data) ->
 init(Parent) ->
     register(?MODULE,self()),
     process_flag(trap_exit,true),
+    ct_util:mark_process(),
     Parent ! {self(),started},
     {ok,Cwd} = file:get_cwd(),
     InitState = #state{start_dir=Cwd},
@@ -284,6 +285,7 @@ run_test1(State=#state{tests=Tests,current_log_dir=LogDir,
 		       logopts=LogOpts}) ->
     Self=self(),
     RunTest = fun() ->
+                      ct_util:mark_process(),
 		      case ct_run:do_run(Tests,[],LogDir,LogOpts) of
 			  {error,_Reason} ->
 			      aborted();
@@ -917,7 +919,7 @@ get_input_data(Input,Key)->
     end.
 
 parse(Input) ->
-    httpd:parse_query(Input).
+    uri_string:dissect_query(Input).
 
 vts_integer_to_list(X) when is_atom(X) ->
     atom_to_list(X);
diff --git a/lib/common_test/test/Makefile b/lib/common_test/test/Makefile
index 0d9149f489..ecd1f727a2 100644
--- a/lib/common_test/test/Makefile
+++ b/lib/common_test/test/Makefile
@@ -73,7 +73,8 @@ MODULES= \
 	ct_log_SUITE \
         ct_SUITE \
 	ct_keep_logs_SUITE \
-	ct_unicode_SUITE
+	ct_unicode_SUITE \
+	ct_auto_clean_SUITE
 
 ERL_FILES= $(MODULES:%=%.erl)
 HRL_FILES= test_server_test_lib.hrl
diff --git a/lib/common_test/test/ct_auto_clean_SUITE.erl b/lib/common_test/test/ct_auto_clean_SUITE.erl
new file mode 100644
index 0000000000..fd81430d0d
--- /dev/null
+++ b/lib/common_test/test/ct_auto_clean_SUITE.erl
@@ -0,0 +1,262 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2009-2016. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-module(ct_auto_clean_SUITE).
+
+-compile(export_all).
+
+-include_lib("common_test/include/ct.hrl").
+-include_lib("common_test/include/ct_event.hrl").
+
+-define(eh, ct_test_support_eh).
+
+%%--------------------------------------------------------------------
+%% Function: init_per_suite(Config0) -> Config1 | {skip,Reason}
+%%
+%% Config0 = Config1 = [tuple()]
+%%   A list of key/value pairs, holding the test case configuration.
+%% Reason = term()
+%%   The reason for skipping the suite.
+%%
+%% Description: Since Common Test starts another Test Server
+%% instance, the tests need to be performed on a separate node (or
+%% there will be clashes with logging processes etc).
+%%--------------------------------------------------------------------
+init_per_suite(Config) ->
+    DataDir = ?config(data_dir, Config),
+    CTHs = filelib:wildcard(filename:join(DataDir,"cth_*.erl")),
+    ct:pal("CTHs: ~p",[CTHs]),
+    [ct:pal("Compiling ~p: ~p",
+	    [FileName,compile:file(FileName,[{outdir,DataDir},debug_info])]) ||
+	FileName <- CTHs],
+    ct_test_support:init_per_suite([{path_dirs,[DataDir]} | Config]).
+
+%%--------------------------------------------------------------------
+%% Function: end_per_suite(Config) -> void()
+%%
+%% Config = [tuple()]
+%%   A list of key/value pairs, holding the test case configuration.
+%%
+%% Description: Cleanup after the suite.
+%%--------------------------------------------------------------------
+end_per_suite(Config) ->
+    ct_test_support:end_per_suite(Config).
+
+%%--------------------------------------------------------------------
+%% Function: init_per_testcase(TestCase, Config0) -> Config1 |
+%%                                                   {skip,Reason}
+%% TestCase = atom()
+%%   Name of the test case that is about to run.
+%% Config0 = Config1 = [tuple()]
+%%   A list of key/value pairs, holding the test case configuration.
+%% Reason = term()
+%%   The reason for skipping the test case.
+%%
+%% Description: Initialization before each test case.
+%%
+%% Note: This function is free to add any key/value pairs to the Config
+%% variable, but should NOT alter/remove any existing entries.
+%%--------------------------------------------------------------------
+init_per_testcase(TestCase, Config) ->
+    ct_test_support:init_per_testcase(TestCase, Config).
+
+%%--------------------------------------------------------------------
+%% Function: end_per_testcase(TestCase, Config) -> void()
+%%
+%% TestCase = atom()
+%%   Name of the test case that is finished.
+%% Config = [tuple()]
+%%   A list of key/value pairs, holding the test case configuration.
+%%
+%% Description: Cleanup after each test case.
+%%--------------------------------------------------------------------
+end_per_testcase(TestCase, Config) ->
+    ct_test_support:end_per_testcase(TestCase, Config).
+
+%%--------------------------------------------------------------------
+%% Function: all(Clause) -> Descr | TestCases | {skip,Reason}
+%%
+%% Clause = doc | suite
+%%   Indicates expected return value.
+%% Descr = [string()] | []
+%%   String that describes the test suite.
+%% TestCases = [TestCase] 
+%% TestCase = atom()
+%%   Name of a test case.
+%% Reason = term()
+%%   The reason for skipping the test suite.
+%%
+%% Description: Returns a description of the test suite (doc) and a
+%%              list of all test cases in the suite (suite).
+%%--------------------------------------------------------------------
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [clean].
+
+groups() -> 
+    [].
+
+init_per_group(_GroupName, Config) ->
+	Config.
+
+end_per_group(_GroupName, Config) ->
+	Config.
+
+%%--------------------------------------------------------------------
+%% TEST CASES
+%%--------------------------------------------------------------------
+
+%%--------------------------------------------------------------------
+%% Function: TestCase(Arg) -> Descr | Spec | ok | exit() | {skip,Reason}
+%%
+%% Arg = doc | suite | Config
+%%   Indicates expected behaviour and return value.
+%% Config = [tuple()]
+%%   A list of key/value pairs, holding the test case configuration.
+%% Descr = [string()] | []
+%%   String that describes the test case.
+%% Spec = [tuple()] | []
+%%   A test specification.
+%% Reason = term()
+%%   The reason for skipping the test case.
+%%
+%% Description: Test case function. Returns a description of the test
+%%              case (doc), then returns a test specification (suite),
+%%              or performs the actual test (Config).
+%%--------------------------------------------------------------------
+
+%%%-----------------------------------------------------------------
+%%% 
+
+clean(Config) when is_list(Config) -> 
+    DataDir = ?config(data_dir, Config),
+
+    ACSuite = filename:join(DataDir, "ac_SUITE"),
+    Opts0 = ct_test_support:get_opts(Config),
+    Opts = eh_opts(Config) ++ Opts0 ++ [{suite,ACSuite},
+                                        {ct_hooks,[cth_auto_clean]}],
+
+    ERPid = ct_test_support:start_event_receiver(Config),
+
+    ok = ct_test_support:run(Opts, Config),
+
+    Events = ct_test_support:get_events(ERPid, Config),
+    ct_test_support:log_events(?FUNCTION_NAME, 
+			       ct_test_support:reformat(Events, ?eh),
+			       ?config(priv_dir, Config),
+			       Opts),
+    TestEvents = events_to_check(?FUNCTION_NAME),
+    ok = ct_test_support:verify_events(TestEvents, Events, Config).
+
+
+%%%-----------------------------------------------------------------
+%%% HELP FUNCTIONS
+%%%-----------------------------------------------------------------
+
+eh_opts(Config) ->        
+    Level = ?config(trace_level, Config),
+    [{event_handler,{?eh,[{cbm,ct_test_support},{trace_level,Level}]}}].
+
+events_to_check(Test) ->
+    %% 2 tests (ct:run_test + script_start) is default
+    events_to_check(Test, 2).
+
+events_to_check(_, 0) ->
+    [];
+events_to_check(Test, N) ->
+    events(Test) ++ events_to_check(Test, N-1).
+
+events(clean) ->
+    [
+     {?eh,start_logging,{'DEF','RUNDIR'}},
+     {?eh,test_start,{'DEF',{'START_TIME','LOGDIR'}}},
+     {?eh,start_info,{1,1,9}},
+
+     {?eh,tc_start,{ac_SUITE,init_per_suite}},
+     {?eh,tc_done,{ac_SUITE,init_per_suite,ok}},
+
+     {?eh,tc_start,{ac_SUITE,tc1}},
+     {?eh,tc_done,{ac_SUITE,tc1,ok}},
+
+     {?eh,test_stats,{1,0,{0,0}}},
+
+     {?eh,tc_start,{ac_SUITE,tc2}},
+     {?eh,tc_done,{ac_SUITE,tc2,ok}},
+
+     {?eh,test_stats,{2,0,{0,0}}},
+
+     [{?eh,tc_start,{ac_SUITE,{init_per_group,s1,[]}}},
+      {?eh,tc_done,{ac_SUITE,{init_per_group,s1,[]},ok}},
+
+      {?eh,tc_start,{ac_SUITE,stc1}},
+      {?eh,tc_done,{ac_SUITE,stc1,ok}},
+
+      {?eh,test_stats,{3,0,{0,0}}},
+
+      {?eh,tc_start,{ac_SUITE,stc2}},
+      {?eh,tc_done,{ac_SUITE,stc2,ok}},
+
+      {?eh,test_stats,{4,0,{0,0}}},
+
+      {?eh,tc_start,{ac_SUITE,{end_per_group,s1,[]}}},
+      {?eh,tc_done,{ac_SUITE,{end_per_group,s1,[]},ok}}],
+
+     {parallel,
+      [{?eh,tc_start,{ac_SUITE,{init_per_group,p1,[parallel]}}},
+       {?eh,tc_done,{ac_SUITE,{init_per_group,p1,[parallel]},ok}},
+
+       {?eh,tc_start,{ac_SUITE,ptc1}},
+       {?eh,tc_start,{ac_SUITE,ptc2}},
+       {?eh,tc_done,{ac_SUITE,ptc1,ok}},
+       {?eh,test_stats,{5,0,{0,0}}},
+       {?eh,tc_done,{ac_SUITE,ptc2,ok}},
+       {?eh,test_stats,{6,0,{0,0}}},
+
+       {?eh,tc_start,{ac_SUITE,{end_per_group,p1,[parallel]}}},
+       {?eh,tc_done,{ac_SUITE,{end_per_group,p1,[parallel]},ok}}]},
+
+     [{?eh,tc_start,{ac_SUITE,{init_per_group,s2,[]}}},
+      {?eh,tc_done,{ac_SUITE,{init_per_group,s2,[]},ok}},
+
+      {?eh,tc_start,{ac_SUITE,stc1}},
+      {?eh,tc_done,{ac_SUITE,stc1,ok}},
+
+      {?eh,test_stats,{7,0,{0,0}}},
+
+      {?eh,tc_start,{ac_SUITE,stc2}},
+      {?eh,tc_done,{ac_SUITE,stc2,ok}},
+
+      {?eh,test_stats,{8,0,{0,0}}},
+
+      {?eh,tc_start,{ac_SUITE,{end_per_group,s2,[]}}},
+      {?eh,tc_done,{ac_SUITE,{end_per_group,s2,[]},ok}}],
+
+     {?eh,tc_start,{ac_SUITE,tc1}},
+     {?eh,tc_done,{ac_SUITE,tc1,ok}},
+
+     {?eh,test_stats,{9,0,{0,0}}},
+
+     {?eh,tc_start,{ac_SUITE,end_per_suite}},
+     {?eh,tc_done,{ac_SUITE,end_per_suite,ok}},
+
+     {?eh,test_done,{'DEF','STOP_TIME'}},
+     {?eh,stop_logging,[]}
+    ].
diff --git a/lib/common_test/test/ct_auto_clean_SUITE_data/ac_SUITE.erl b/lib/common_test/test/ct_auto_clean_SUITE_data/ac_SUITE.erl
new file mode 100644
index 0000000000..dae7c1e22c
--- /dev/null
+++ b/lib/common_test/test/ct_auto_clean_SUITE_data/ac_SUITE.erl
@@ -0,0 +1,181 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2009-2016. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-module(ac_SUITE).
+
+-compile(export_all).
+
+-include_lib("common_test/include/ct.hrl").
+
+%%--------------------------------------------------------------------
+%% @spec suite() -> Info
+%% Info = [tuple()]
+%% @end
+%%--------------------------------------------------------------------
+suite() ->
+    [{timetrap,{seconds,30}}].
+
+%%--------------------------------------------------------------------
+%% @spec init_per_suite(Config0) ->
+%%     Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}
+%% Config0 = Config1 = [tuple()]
+%% Reason = term()
+%% @end
+%%--------------------------------------------------------------------
+init_per_suite(Config) ->
+    start_processes(),
+    Config.
+
+%%--------------------------------------------------------------------
+%% @spec end_per_suite(Config0) -> term() | {save_config,Config1}
+%% Config0 = Config1 = [tuple()]
+%% @end
+%%--------------------------------------------------------------------
+end_per_suite(_Config) ->
+    start_processes(),
+    ok.
+
+%%--------------------------------------------------------------------
+%% @spec init_per_group(GroupName, Config0) ->
+%%               Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}
+%% GroupName = atom()
+%% Config0 = Config1 = [tuple()]
+%% Reason = term()
+%% @end
+%%--------------------------------------------------------------------
+init_per_group(_GroupName, Config) ->
+    start_processes(),
+    Config.
+
+%%--------------------------------------------------------------------
+%% @spec end_per_group(GroupName, Config0) ->
+%%               term() | {save_config,Config1}
+%% GroupName = atom()
+%% Config0 = Config1 = [tuple()]
+%% @end
+%%--------------------------------------------------------------------
+end_per_group(_GroupName, _Config) ->
+    start_processes(),
+    ok.
+                    
+%%--------------------------------------------------------------------
+%% @spec init_per_testcase(TestCase, Config0) ->
+%%               Config1 | {skip,Reason} | {skip_and_save,Reason,Config1}
+%% TestCase = atom()
+%% Config0 = Config1 = [tuple()]
+%% Reason = term()
+%% @end
+%%--------------------------------------------------------------------
+init_per_testcase(_TestCase, Config) ->
+    start_processes(),
+    Config.
+
+%%--------------------------------------------------------------------
+%% @spec end_per_testcase(TestCase, Config0) ->
+%%               term() | {save_config,Config1} | {fail,Reason}
+%% TestCase = atom()
+%% Config0 = Config1 = [tuple()]
+%% Reason = term()
+%% @end
+%%--------------------------------------------------------------------
+end_per_testcase(_TestCase, _Config) ->
+    start_processes(),
+    ok.
+
+%%--------------------------------------------------------------------
+%% @spec groups() -> [Group]
+%% Group = {GroupName,Properties,GroupsAndTestCases}
+%% GroupName = atom()
+%% Properties = [parallel | sequence | Shuffle | {RepeatType,N}]
+%% GroupsAndTestCases = [Group | {group,GroupName} | TestCase]
+%% TestCase = atom()
+%% Shuffle = shuffle | {shuffle,{integer(),integer(),integer()}}
+%% RepeatType = repeat | repeat_until_all_ok | repeat_until_all_fail |
+%%              repeat_until_any_ok | repeat_until_any_fail
+%% N = integer() | forever
+%% @end
+%%--------------------------------------------------------------------
+groups() ->
+    [{s1,[],[stc1,stc2]},
+     {p1,[parallel],[ptc1,ptc2]},
+     {s2,[],[stc1,stc2]}].
+
+%%! What about nested groups??
+
+%%--------------------------------------------------------------------
+%% @spec all() -> GroupsAndTestCases | {skip,Reason}
+%% GroupsAndTestCases = [{group,GroupName} | TestCase]
+%% GroupName = atom()
+%% TestCase = atom()
+%% Reason = term()
+%% @end
+%%--------------------------------------------------------------------
+all() -> 
+    [
+     [tc1,tc2],
+     {group,s1},
+     {group,p1},
+     {group,s2},
+     tc1
+    ].
+
+tc1(_Config) ->
+    start_processes(),
+    ok.
+
+tc2(_Config) ->
+    start_processes(),
+    ok.
+
+stc1(_Config) ->
+    start_processes(),
+    ok.
+
+stc2(_Config) ->
+    start_processes(),
+    ok.
+
+ptc1(_Config) ->
+    start_processes(),
+    ok.
+
+ptc2(_Config) ->
+    start_processes(),
+    ok.
+
+
+%%%-----------------------------------------------------------------
+%%% 
+
+start_processes() ->
+    Init = fun() ->
+                   process_flag(trap_exit, true),
+                   do_spawn(fun() -> receive _ -> ok end end),
+                   receive _ ->
+                           ok
+                   end
+           end,
+    do_spawn(Init).
+
+do_spawn(Fun) ->
+    Pid = spawn(Fun),
+    ct:log("Process ~w started with group leader ~w",
+           [Pid,element(2, process_info(Pid, group_leader))]),
+    Pid.
diff --git a/lib/common_test/test/ct_auto_clean_SUITE_data/cth_auto_clean.erl b/lib/common_test/test/ct_auto_clean_SUITE_data/cth_auto_clean.erl
new file mode 100644
index 0000000000..137c81969d
--- /dev/null
+++ b/lib/common_test/test/ct_auto_clean_SUITE_data/cth_auto_clean.erl
@@ -0,0 +1,214 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2009-2016. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-module(cth_auto_clean).
+
+%% CTH Callbacks
+-export([id/1, init/2,
+	 pre_init_per_suite/3, post_init_per_suite/4,
+         pre_end_per_suite/3, post_end_per_suite/4,
+	 pre_init_per_group/4, post_init_per_group/5,
+	 pre_end_per_group/4, post_end_per_group/5,
+	 pre_init_per_testcase/4, post_init_per_testcase/5,
+	 pre_end_per_testcase/4, post_end_per_testcase/5]).
+
+id(_Opts) ->
+    ?MODULE.
+
+init(?MODULE, _Opts) ->
+    ok.
+
+pre_init_per_suite(_Suite, Config, State) ->
+    identify(?FUNCTION_NAME),
+    SharedGL = test_server_io:get_gl(true),
+    SharedGL = find_and_kill(),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    %% get status of processes at startup, to be compared with end result
+    {Config, [{all_procs,processes()} | State]}.
+
+post_init_per_suite(_Suite, _Config, Return, State) ->
+    identify(?FUNCTION_NAME),
+    SharedGL = find_and_kill(),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    {Return, State}.
+
+pre_end_per_suite(_Suite, Config, State) ->
+    identify(?FUNCTION_NAME),
+    SharedGL = find_and_kill(),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    {Config, State}.
+
+post_end_per_suite(_Suite, _Config, Return, State) ->
+    identify(?FUNCTION_NAME),
+    SharedGL = find_and_kill(),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    AllProcs = processes(),
+    Remaining = AllProcs--proplists:get_value(all_procs, State),
+    ct:pal("Final remaining processes = ~p", [Remaining]),
+    %% only the end_per_suite process shoud remain at this point!
+    Remaining = [self()],
+    {Return, State}.
+
+pre_init_per_group(_Suite, _Group, Config, State) ->
+    identify(?FUNCTION_NAME),
+    SharedGL = find_and_kill(procs_and_gls),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    {Config, State}.
+
+post_init_per_group(_Suite, _Group, _Config, Result, State) -> 
+    identify(?FUNCTION_NAME),
+    SharedGL = find_and_kill(procs_and_gls),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    {Result, State}.
+
+pre_init_per_testcase(_Suite, _TC, Config, State) ->
+    identify(?FUNCTION_NAME),
+    ThisGL = group_leader(),
+    find_and_kill(proc, ThisGL),
+    case proplists:get_value(tc_group_properties, Config) of
+        [{name,_},parallel] ->
+            timer:sleep(1000);
+        _ ->
+            do_until(fun() -> element(1,ct:remaining_test_procs()) end, [])
+    end,
+    {Config, State}.
+
+post_init_per_testcase(_Suite, _TC, Config, Return, State) ->
+    identify(?FUNCTION_NAME),
+    ThisGL = group_leader(),
+    find_and_kill(proc, ThisGL),
+    case proplists:get_value(tc_group_properties, Config) of
+        [{name,_},parallel] ->
+            timer:sleep(1000);
+        _ ->
+            do_until(fun() -> element(1,ct:remaining_test_procs()) end, [])
+    end,
+    {Return, State}.
+
+pre_end_per_testcase(_Suite, _TC, Config, State) ->
+    identify(?FUNCTION_NAME),
+    ThisGL = group_leader(),
+    find_and_kill(proc, ThisGL),
+    case proplists:get_value(tc_group_properties, Config) of
+        [{name,_},parallel] ->
+            timer:sleep(1000);
+        _ ->
+            do_until(fun() -> element(1,ct:remaining_test_procs()) end, [])
+    end,
+    {Config, State}.
+
+post_end_per_testcase(_Suite, _TC, Config, Result, State) ->
+    identify(?FUNCTION_NAME),
+    ThisGL = group_leader(),
+    find_and_kill(proc, ThisGL),
+    case proplists:get_value(tc_group_properties, Config) of
+        [{name,_},parallel] ->
+            timer:sleep(1000);
+        _ ->
+            do_until(fun() -> element(1,ct:remaining_test_procs()) end, [])
+    end,
+    {Result, State}.
+
+pre_end_per_group(_Suite, _Group, Config, State) ->
+    identify(?FUNCTION_NAME),
+    SharedGL = find_and_kill(procs_and_gls),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    {Config, State}.
+
+post_end_per_group(_Suite, _Group, _Config, Return, State) ->
+    identify(?FUNCTION_NAME),
+    SharedGL = find_and_kill(procs_and_gls),
+    do_until(fun() -> ct:remaining_test_procs() end, {[],SharedGL,[]}),
+    {Return, State}.
+
+
+%%%-----------------------------------------------------------------
+%%% HELP FUNCTIONS
+%%%-----------------------------------------------------------------
+
+identify(Func) ->
+    ct:pal("********** THIS IS ~w on ~w", [Func, self()]),
+    ok.
+
+find_and_kill() ->
+    find_and_kill(procs).
+
+find_and_kill(procs) ->
+    {Procs,SharedGL,_ParallelGLs} = ct:remaining_test_procs(),
+    ct:pal("Remaining test processes = ~p", [pi(Procs)]),
+    [pkill(P, kill) || {P,_GL} <- Procs],
+    SharedGL;
+
+find_and_kill(procs_and_gls) ->
+    {Procs,SharedGL,GLs} = ct:remaining_test_procs(),
+    ct:pal("Remaining test processes = ~p", [pi(Procs)]),
+    [pkill(P, kill) || {P,_GL} <- Procs],
+    ct:pal("Remaining group leaders = ~p", [pi(GLs)]),
+    [pkill(GL, kill) || GL <- GLs, GL /= SharedGL],
+    SharedGL.
+
+find_and_kill(proc, ProcGL) ->
+    {Procs,SharedGL,GLs} = ct:remaining_test_procs(),
+    ct:pal("Remaining test processes = ~p", [pi(Procs++GLs)]),
+    [pkill(P, kill) || {P,GL} <- Procs, GL == ProcGL],
+    SharedGL.
+
+pi([{P,_GL}|Ps]) ->
+    pi([P|Ps]);
+pi([P|Ps]) ->
+    case node() == node(P) of
+        true ->
+            {_,GL} = process_info(P,group_leader),
+            {_,CF} = process_info(P,current_function),
+            {_,IC} = process_info(P,initial_call),
+            {_,D} = process_info(P,dictionary),
+            Shared = test_server_io:get_gl(true),
+            User = whereis(user),
+            if (GL /= P) and (GL /= Shared) and (GL /= User) ->
+                    [{P,GL,CF,IC,D} | pi([GL|Ps])];
+               true ->
+                    [{P,GL,CF,IC,D} | pi(Ps)]
+            end;
+        false ->
+            pi(Ps)
+    end;
+pi([]) ->
+    [].
+
+do_until(Fun, Until) ->
+    io:format("Will do until ~p~n", [Until]),
+    do_until(Fun, Until, 1000).
+
+do_until(_, Until, 0) ->
+    io:format("Couldn't get ~p~n", [Until]),
+    exit({not_reached,Until});
+
+do_until(Fun, Until, N) ->
+    case Fun() of
+        Until ->
+            ok;
+        _Tmp ->
+            do_until(Fun, Until, N-1)
+    end.
+
+pkill(P, How) ->
+    ct:pal("KILLING ~w NOW!", [P]),
+    exit(P, How).
+
diff --git a/lib/common_test/test/ct_netconfc_SUITE_data/ns.erl b/lib/common_test/test/ct_netconfc_SUITE_data/ns.erl
index 63bf9be134..975f6cafcb 100644
--- a/lib/common_test/test/ct_netconfc_SUITE_data/ns.erl
+++ b/lib/common_test/test/ct_netconfc_SUITE_data/ns.erl
@@ -231,8 +231,7 @@ data_for_channel(CM, Ch, Data, State) ->
 		    {ok, NewState}
 	    end
     catch
-	Class:Reason ->
-	    Stacktrace = erlang:get_stacktrace(),
+	Class:Reason:Stacktrace ->
 	    error_logger:error_report([{?MODULE, data_for_channel},
 				       {request, Data},
 				       {buffer, State#session.buffer},
diff --git a/lib/common_test/test/ct_unicode_SUITE_data/unicode_atoms_SUITE.erl b/lib/common_test/test/ct_unicode_SUITE_data/unicode_atoms_SUITE.erl
index 993452500e..041c13cdbd 100644
--- a/lib/common_test/test/ct_unicode_SUITE_data/unicode_atoms_SUITE.erl
+++ b/lib/common_test/test/ct_unicode_SUITE_data/unicode_atoms_SUITE.erl
@@ -77,7 +77,7 @@ all() ->
 
 'fail_αβ_4'(_Config) ->
     ct:log("This is test case ~tw",[?FUNCTION_NAME]),
-    S = try throw(ok) catch throw:ok -> erlang:get_stacktrace() end,
+    S = try throw(ok) catch throw:ok:Stacktrace -> Stacktrace end,
     erlang:raise(error,{error,testcase,?FUNCTION_NAME},S),
     ok.
 
diff --git a/lib/common_test/test/test_server_test_lib.erl b/lib/common_test/test/test_server_test_lib.erl
index e3d987a2ea..9ee946af0b 100644
--- a/lib/common_test/test/test_server_test_lib.erl
+++ b/lib/common_test/test/test_server_test_lib.erl
@@ -121,7 +121,7 @@ parse_suite(FileName) ->
     end.
 
 fline(Fd) ->
-    case prim_file:read_line(Fd) of
+    case file:read_line(Fd) of
 	eof -> eof;
 	{ok, Line} -> Line
     end.
diff --git a/lib/common_test/test_server/ts_install_cth.erl b/lib/common_test/test_server/ts_install_cth.erl
index 5d325b1115..35a5ec916c 100644
--- a/lib/common_test/test_server/ts_install_cth.erl
+++ b/lib/common_test/test_server/ts_install_cth.erl
@@ -108,8 +108,7 @@ pre_init_per_suite(_Suite,Config,State) ->
 	{add_node_name(Config, State), State}
     catch error:{badmatch,{error,enoent}} ->
 	{add_node_name(Config, State), State};
-	  Error:Reason ->
-	    Stack = erlang:get_stacktrace(),
+	  Error:Reason:Stack ->
 	    ct:pal("~p failed! ~p:{~p,~p}",[?MODULE,Error,Reason,Stack]),
 	    {{fail,{?MODULE,{Error,Reason, Stack}}},State}
     end.
diff --git a/lib/common_test/vsn.mk b/lib/common_test/vsn.mk
index 7b959ebfe3..ea3e9871cb 100644
--- a/lib/common_test/vsn.mk
+++ b/lib/common_test/vsn.mk
@@ -1 +1 @@
-COMMON_TEST_VSN = 1.15.2
+COMMON_TEST_VSN = 1.15.4
diff --git a/lib/compiler/doc/src/Makefile b/lib/compiler/doc/src/Makefile
index 254445c111..13210de040 100644
--- a/lib/compiler/doc/src/Makefile
+++ b/lib/compiler/doc/src/Makefile
@@ -39,7 +39,7 @@ XML_APPLICATION_FILES = ref_man.xml
 XML_REF3_FILES = compile.xml
 
 XML_PART_FILES =
-XML_CHAPTER_FILES = notes.xml notes_history.xml
+XML_CHAPTER_FILES = notes.xml
 
 BOOK_FILES = book.xml
 
diff --git a/lib/compiler/doc/src/compile.xml b/lib/compiler/doc/src/compile.xml
index b398871ddf..06afc55c07 100644
--- a/lib/compiler/doc/src/compile.xml
+++ b/lib/compiler/doc/src/compile.xml
@@ -233,6 +233,15 @@ module.beam: module.erl \
   header.hrl</code>
           </item>
 
+          <tag><c>makedep_side_effect</c></tag>
+          <item>
+	    <p>The dependecies are created as a side effect to the
+	    normal compilation process. This means that the object
+	    file will also be produced. This option override the
+	    <c>makedep</c> option.
+	    </p>
+	  </item>
+
           <tag><c>{makedep_output, Output}</c></tag>
           <item>
             <p>Writes generated rules to <c>Output</c> instead of the
diff --git a/lib/compiler/doc/src/notes.xml b/lib/compiler/doc/src/notes.xml
index 433fc3b86e..bc1f68337b 100644
--- a/lib/compiler/doc/src/notes.xml
+++ b/lib/compiler/doc/src/notes.xml
@@ -32,6 +32,47 @@
   <p>This document describes the changes made to the Compiler
     application.</p>
 
+<section><title>Compiler 7.1.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p>The internal compiler pass (<c>beam_validator</c>)
+	    that validates the generated code has been
+	    strengthened.</p>
+	    <p>When compiling from BEAM assembly code, the
+	    <c>beam_type</c> optimizer pass could make the code
+	    unsafe. Corrected.</p>
+          <p>
+	    Own Id: OTP-14863</p>
+        </item>
+        <item>
+	    <p>Corrected optimizations of integers matched out from
+	    binaries and used in bit operations.</p>
+          <p>
+	    Own Id: OTP-14898</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Compiler 7.1.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p>The '<c>deterministic</c>' option was not recognized
+	    when given in a <c>-compile()</c> attribute in the source
+	    code.</p>
+          <p>
+	    Own Id: OTP-14773 Aux Id: ERL-498 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Compiler 7.1.3</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
@@ -510,6 +551,22 @@
 
 </section>
 
+
+<section><title>Compiler 6.0.3.1</title>
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p>Fail labels on guard BIFs weren't taken into account
+	    during an optimization pass, and a bug in the validation
+	    pass sometimes prevented this from being noticed when a
+	    fault occurred.</p>
+          <p>
+	    Own Id: OTP-14522 Aux Id: ERIERL-48 </p>
+        </item>
+      </list>
+    </section>
+</section>
+
 <section><title>Compiler 6.0.3</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/compiler/internal_doc/cerl-notes.md b/lib/compiler/internal_doc/cerl-notes.md
new file mode 100644
index 0000000000..705fe8f42d
--- /dev/null
+++ b/lib/compiler/internal_doc/cerl-notes.md
@@ -0,0 +1,75 @@
+Some notes on the cerl modules
+==============================
+
+Maps in cerl_clauses:match/3
+----------------------------
+
+Not much optimization is done for maps in `cerl_clauses:match/3`.
+
+The reason is that the inliner (`cerl_inline`) was not designed for
+data types that depend on variables bound in the enclosing environment
+(for example, the keys for maps).  If we attempt to extend the
+optimizations for maps similar to the optimizations for the other data
+types, the inliner will crash for certain code.  Here is an example of
+code that would crash the inliner:
+
+     t() ->
+        f(key).
+
+     f(K) ->
+        case #{K => value} of
+          #{key := V} -> V
+        end.
+
+The reason for the crash is that the inliner works in several
+passes and calls `cerl_clauses:match/3` twice.  The inliner will
+assume that the same result will be returned both times, but
+for this example different bindings will be returned.
+
+Here is the rough outline of what happens:
+
+* The first time `cerl_clauses:match/3` will be asked to match the
+pattern `#{K := V}` against `#{key => value}`. It cannot say more
+than that the pattern *may* match.
+
+* Now the inliner will add the bindings to body of the clause (which
+is simply `V`).  In this case, the bindings are still empty, so
+nothing is added.
+
+* The inliner will now do some substitutions and renaming.  The
+variable `K` will be replaced with `key`.
+
+* The next time `cerl_clauses:match/3` is called, it will be asked to
+match the pattern `#{key := V}` against `#{key => value#}`.  In this
+case, there will be a match and the bindings can be extended with
+`{V,value}`.
+
+* The inliner will see that the entire case can be removed.  Only
+the body for the clause needs to be kept.
+
+Thus, after inlining the function `t/0` will look like this:
+
+     t() ->
+        V.
+
+The problem here is that the inliner assumed that the bindings from
+the first and second call to `cer_clauses:match/3` would be the same.
+It used the empty bindings from the first call for the body.
+
+The correct way would be to add the bindings from the second call:
+
+     t() ->
+        let V = value in V.
+
+### How to fix this ###
+
+The inliner will need to call `cerl_clauses:match/3` after doing
+all substitutions and renaming.  It is not clear to me how difficult
+that would be.  I assume that the inliner is written the way it is
+for a good reason.  That means that switching the order things are
+done would lead to correctness and/or performance problems.
+
+### What must also be done to fix this ###
+
+`cerl_inline:make_template/3` must be extended to create a template
+for maps.  That is relatively straightforward.
diff --git a/lib/compiler/src/Makefile b/lib/compiler/src/Makefile
index 9b22e5197b..9e96147787 100644
--- a/lib/compiler/src/Makefile
+++ b/lib/compiler/src/Makefile
@@ -93,16 +93,14 @@ MODULES =  \
 	v3_codegen \
 	v3_core \
 	v3_kernel \
-	v3_kernel_pp \
-	v3_life
+	v3_kernel_pp
 
 BEAM_H = $(wildcard ../priv/beam_h/*.h)
 
 HRL_FILES= \
 	beam_disasm.hrl \
 	core_parse.hrl \
-	v3_kernel.hrl \
-	v3_life.hrl
+	v3_kernel.hrl
 
 YRL_FILE = core_parse.yrl
 
@@ -187,7 +185,7 @@ release_docs_spec:
 # ---------------------------------------------------- 
 
 $(EBIN)/beam_disasm.beam: $(EGEN)/beam_opcodes.hrl beam_disasm.hrl
-$(EBIN)/beam_listing.beam: v3_life.hrl
+$(EBIN)/beam_listing.beam: core_parse.hrl v3_kernel.hrl
 $(EBIN)/beam_validator.beam: beam_disasm.hrl
 $(EBIN)/cerl.beam: core_parse.hrl
 $(EBIN)/compile.beam: core_parse.hrl ../../stdlib/include/erl_compile.hrl
@@ -200,8 +198,7 @@ $(EBIN)/sys_core_dsetel.beam: core_parse.hrl
 $(EBIN)/sys_core_fold.beam: core_parse.hrl
 $(EBIN)/sys_core_fold_lists.beam: core_parse.hrl
 $(EBIN)/sys_core_inline.beam: core_parse.hrl
-$(EBIN)/v3_codegen.beam: v3_life.hrl
+$(EBIN)/v3_codegen.beam: v3_kernel.hrl
 $(EBIN)/v3_core.beam: core_parse.hrl
 $(EBIN)/v3_kernel.beam: core_parse.hrl v3_kernel.hrl
 $(EBIN)/v3_kernel_pp.beam: v3_kernel.hrl
-$(EBIN)/v3_life.beam: v3_kernel.hrl v3_life.hrl
diff --git a/lib/compiler/src/beam_a.erl b/lib/compiler/src/beam_a.erl
index cdb32d5d55..91acb19971 100644
--- a/lib/compiler/src/beam_a.erl
+++ b/lib/compiler/src/beam_a.erl
@@ -42,8 +42,7 @@ function({function,Name,Arity,CLabel,Is0}) ->
 	Is = beam_jump:remove_unused_labels(Is1),
 	{function,Name,Arity,CLabel,Is}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -59,8 +58,17 @@ rename_instrs([{call_only,A,F}|Is]) ->
 rename_instrs([{call_ext_only,A,F}|Is]) ->
     [{call_ext,A,F},return|rename_instrs(Is)];
 rename_instrs([{'%live',_}|Is]) ->
-    %% When compiling from old .S files.
+    %% Ignore old type of live annotation. Only happens when compiling
+    %% from very old .S files.
     rename_instrs(Is);
+rename_instrs([{get_list,S,D1,D2}|Is]) ->
+    %% Only happens when compiling from old .S files.
+    if
+        D1 =:= S ->
+            [{get_tl,S,D2},{get_hd,S,D1}|rename_instrs(Is)];
+        true ->
+            [{get_hd,S,D1},{get_tl,S,D2}|rename_instrs(Is)]
+    end;
 rename_instrs([I|Is]) ->
     [rename_instr(I)|rename_instrs(Is)];
 rename_instrs([]) -> [].
diff --git a/lib/compiler/src/beam_asm.erl b/lib/compiler/src/beam_asm.erl
index 9ecbb7884c..5ef340c831 100644
--- a/lib/compiler/src/beam_asm.erl
+++ b/lib/compiler/src/beam_asm.erl
@@ -24,7 +24,7 @@
 -export([module/4]).
 -export([encode/2]).
 
--export_type([fail/0,label/0,reg/0,src/0,module_code/0,function_name/0]).
+-export_type([fail/0,label/0,reg/0,reg_num/0,src/0,module_code/0,function_name/0]).
 
 -import(lists, [map/2,member/2,keymember/3,duplicate/2,splitwith/2]).
 -include("beam_opcodes.hrl").
@@ -240,9 +240,7 @@ build_form(Id, Chunks0) when byte_size(Id) =:= 4, is_list(Chunks0) ->
 
 chunk(Id, Contents) when byte_size(Id) =:= 4, is_binary(Contents) ->
     Size = byte_size(Contents),
-    [<<Id/binary,Size:32>>,Contents|pad(Size)];
-chunk(Id, Contents) when is_list(Contents) ->
-    chunk(Id, list_to_binary(Contents)).
+    [<<Id/binary,Size:32>>,Contents|pad(Size)].
 
 %% Build a correctly padded chunk (with a sub-header).
 
@@ -409,7 +407,17 @@ encode_arg({atom, Atom}, Dict0) when is_atom(Atom) ->
     {Index, Dict} = beam_dict:atom(Atom, Dict0),
     {encode(?tag_a, Index), Dict};
 encode_arg({integer, N}, Dict) ->
-    {encode(?tag_i, N), Dict};
+    %% Conservatily assume that all integers whose absolute
+    %% value is greater than 1 bsl 128 will be bignums in
+    %% the runtime system.
+    if
+        N >= 1 bsl 128 ->
+            encode_arg({literal, N}, Dict);
+        N =< -(1 bsl 128) ->
+            encode_arg({literal, N}, Dict);
+        true ->
+            {encode(?tag_i, N), Dict}
+    end;
 encode_arg(nil, Dict) ->
     {encode(?tag_a, 0), Dict};
 encode_arg({f, W}, Dict) ->
@@ -467,7 +475,7 @@ encode_alloc_list_1([{floats,Floats}|T], Dict, Acc0) ->
 encode_alloc_list_1([], Dict, Acc) ->
     {iolist_to_binary(Acc),Dict}.
 
--spec encode(non_neg_integer(), pos_integer()) -> iodata().
+-spec encode(non_neg_integer(), integer()) -> iodata().
 
 encode(Tag, N) when N < 0 ->
     encode1(Tag, negative_to_bytes(N));
diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl
index 6543e05e20..8cd271e1dc 100644
--- a/lib/compiler/src/beam_block.erl
+++ b/lib/compiler/src/beam_block.erl
@@ -23,30 +23,36 @@
 -module(beam_block).
 
 -export([module/2]).
--import(lists, [reverse/1,reverse/2,foldl/3,member/2]).
+-import(lists, [reverse/1,reverse/2,member/2]).
 
 -spec module(beam_utils:module_code(), [compile:option()]) ->
                     {'ok',beam_utils:module_code()}.
 
-module({Mod,Exp,Attr,Fs0,Lc}, _Opt) ->
-    Fs = [function(F) || F <- Fs0],
+module({Mod,Exp,Attr,Fs0,Lc}, Opts) ->
+    Blockify = not member(no_blockify, Opts),
+    Fs = [function(F, Blockify) || F <- Fs0],
     {ok,{Mod,Exp,Attr,Fs,Lc}}.
 
-function({function,Name,Arity,CLabel,Is0}) ->
+function({function,Name,Arity,CLabel,Is0}, Blockify) ->
     try
 	%% Collect basic blocks and optimize them.
-	Is1 = blockify(Is0),
-	Is2 = embed_lines(Is1),
-	Is3 = move_allocates(Is2),
-	Is4 = beam_utils:live_opt(Is3),
-	Is5 = opt_blocks(Is4),
-	Is6 = beam_utils:delete_live_annos(Is5),
-
-	%% Done.
-	{function,Name,Arity,CLabel,Is6}
+        Is1 = case Blockify of
+                  false -> Is0;
+                  true -> blockify(Is0)
+              end,
+        Is2 = embed_lines(Is1),
+        Is3 = local_cse(Is2),
+        Is4 = beam_utils:anno_defs(Is3),
+        Is5 = move_allocates(Is4),
+        Is6 = beam_utils:live_opt(Is5),
+        Is7 = opt_blocks(Is6),
+        Is8 = beam_utils:delete_annos(Is7),
+        Is = opt_allocs(Is8),
+
+        %% Done.
+        {function,Name,Arity,CLabel,Is}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -102,7 +108,8 @@ collect({put_tuple,A,D})     -> {set,[D],[],{put_tuple,A}};
 collect({put,S})             -> {set,[],[S],put};
 collect({get_tuple_element,S,I,D}) -> {set,[D],[S],{get_tuple_element,I}};
 collect({set_tuple_element,S,D,I}) -> {set,[],[S,D],{set_tuple_element,I}};
-collect({get_list,S,D1,D2})  -> {set,[D1,D2],[S],get_list};
+collect({get_hd,S,D})  ->       {set,[D],[S],get_hd};
+collect({get_tl,S,D})  ->       {set,[D],[S],get_tl};
 collect(remove_message)      -> {set,[],[],remove_message};
 collect({put_map,F,Op,S,D,R,{list,Puts}}) ->
     {set,[D],[S|Puts],{alloc,R,{put_map,Op,F}}};
@@ -130,23 +137,27 @@ embed_lines([{block,B2},{line,_}=Line,{block,B1}|T], Acc) ->
 embed_lines([{block,B1},{line,_}=Line|T], Acc) ->
     B = {block,[{set,[],[],Line}|B1]},
     embed_lines([B|T], Acc);
+embed_lines([{block,B2},{block,B1}|T], Acc) ->
+    %% This can only happen when beam_block is run for
+    %% the second time.
+    B = {block,B1++B2},
+    embed_lines([B|T], Acc);
 embed_lines([I|Is], Acc) ->
     embed_lines(Is, [I|Acc]);
 embed_lines([], Acc) -> Acc.
 
 opt_blocks([{block,Bl0}|Is]) ->
     %% The live annotation at the beginning is not useful.
-    [{'%live',_,_}|Bl] = Bl0,
+    [{'%anno',_}|Bl] = Bl0,
     [{block,opt_block(Bl)}|opt_blocks(Is)];
 opt_blocks([I|Is]) ->
     [I|opt_blocks(Is)];
 opt_blocks([]) -> [].
 
 opt_block(Is0) ->
-    Is = find_fixpoint(fun(Is) ->
-			       opt_tuple_element(opt(Is))
-		       end, Is0),
-    opt_alloc(Is).
+    find_fixpoint(fun(Is) ->
+                          opt_tuple_element(opt(Is))
+                  end, Is0).
 
 find_fixpoint(OptFun, Is0) ->
     case OptFun(Is0) of
@@ -173,7 +184,7 @@ find_fixpoint(OptFun, Is0) ->
 %%  safe to assume that if x(N) is initialized, then all lower-numbered
 %%  x registers are also initialized.
 %%
-%%  For example, in general it is not safe to transform the following
+%%  For example, we must be careful when transforming the following
 %%  instructions:
 %%
 %%     get_tuple_element x(0) Element => x(1)
@@ -185,13 +196,9 @@ find_fixpoint(OptFun, Is0) ->
 %%     get_tuple_element x(0) Element => x(1)
 %%
 %%  The transformation is safe if and only if x(1) has been
-%%  initialized previously. Unfortunately, beam_reorder may have moved
-%%  a get_tuple_element instruction so that x(1) is not always
-%%  initialized when this code is reached. To find whether or not x(1)
-%%  is initialized, we would need to analyze all code preceding these
-%%  two instructions (across branches). Since we currently don't have
-%%  any practical mechanism for doing that, we will have to
-%%  conservatively assume that the transformation is unsafe.
+%%  initialized previously.  We will use the annotations added by
+%%  beam_utils:anno_defs/1 to determine whether x(a) has been
+%%  initialized.
 
 move_allocates([{block,Bl0}|Is]) ->
     Bl = move_allocates_1(reverse(Bl0), []),
@@ -200,40 +207,77 @@ move_allocates([I|Is]) ->
     [I|move_allocates(Is)];
 move_allocates([]) -> [].
 
-move_allocates_1([I|Is], [{set,[],[],{alloc,Live0,Info}}|Acc]=Acc0) ->
-    case {alloc_may_pass(I),alloc_live_regs(I, Live0)} of
-	{false,_} ->
-	    move_allocates_1(Is, [I|Acc0]);
-	{true,not_possible} ->
-	    move_allocates_1(Is, [I|Acc0]);
-	{true,Live} when is_integer(Live) ->
-	    A = {set,[],[],{alloc,Live,Info}},
-	    move_allocates_1(Is, [A,I|Acc])
+move_allocates_1([{'%anno',_}|Is], Acc) ->
+    move_allocates_1(Is, Acc);
+move_allocates_1([I|Is], [{set,[],[],{alloc,Live0,Info0}}|Acc]=Acc0) ->
+    case alloc_may_pass(I) of
+        false ->
+            move_allocates_1(Is, [I|Acc0]);
+        true ->
+            case alloc_live_regs(I, Is, Live0) of
+                not_possible ->
+                    move_allocates_1(Is, [I|Acc0]);
+                Live when is_integer(Live) ->
+                    Info = safe_info(Info0),
+                    A = {set,[],[],{alloc,Live,Info}},
+                    move_allocates_1(Is, [A,I|Acc])
+            end
     end;
 move_allocates_1([I|Is], Acc) ->
     move_allocates_1(Is, [I|Acc]);
 move_allocates_1([], Acc) -> Acc.
 
+alloc_may_pass({set,_,[{fr,_}],fmove}) -> false;
 alloc_may_pass({set,_,_,{alloc,_,_}}) -> false;
 alloc_may_pass({set,_,_,{set_tuple_element,_}}) -> false;
 alloc_may_pass({set,_,_,put_list}) -> false;
 alloc_may_pass({set,_,_,put}) -> false;
 alloc_may_pass({set,_,_,_}) -> true.
-    
+
+safe_info({nozero,Stack,Heap,_}) ->
+    %% nozero is not safe if the allocation instruction is moved
+    %% upwards past an instruction that may throw an exception
+    %% (such as element/2).
+    {zero,Stack,Heap,[]};
+safe_info(Info) -> Info.
+
 %% opt([Instruction]) -> [Instruction]
 %%  Optimize the instruction stream inside a basic block.
 
 opt([{set,[X],[X],move}|Is]) -> opt(Is);
+opt([{set,[Dst],_,move},{set,[Dst],[Src],move}=I|Is]) when Dst =/= Src ->
+    opt([I|Is]);
+opt([{set,[{x,0}],[S1],move}=I1,{set,[D2],[{x,0}],move}|Is]) ->
+    opt([I1,{set,[D2],[S1],move}|Is]);
+opt([{set,[{x,0}],[S1],move}=I1,{set,[D2],[S2],move}|Is0]) when S1 =/= D2 ->
+    %% Place move S x0 at the end of move sequences so that
+    %% loader can merge with the following instruction
+    {Ds,Is} = opt_moves([D2], Is0),
+    [{set,Ds,[S2],move}|opt([I1|Is])];
 opt([{set,_,_,{line,_}}=Line1,
      {set,[D1],[{integer,Idx1},Reg],{bif,element,{f,0}}}=I1,
      {set,_,_,{line,_}}=Line2,
      {set,[D2],[{integer,Idx2},Reg],{bif,element,{f,0}}}=I2|Is])
   when Idx1 < Idx2, D1 =/= D2, D1 =/= Reg, D2 =/= Reg ->
     opt([Line2,I2,Line1,I1|Is]);
+opt([{set,[D1],[{integer,Idx1},Reg],{bif,element,{f,L}}}=I1,
+     {set,[D2],[{integer,Idx2},Reg],{bif,element,{f,L}}}=I2|Is])
+  when Idx1 < Idx2, D1 =/= D2, D1 =/= Reg, D2 =/= Reg ->
+    opt([I2,I1|Is]);
+opt([{set,Hd0,Cons,get_hd}=GetHd,
+     {set,Tl0,Cons,get_tl}=GetTl|Is0]) ->
+    case {opt_moves(Hd0, [GetTl|Is0]),opt_moves(Tl0, [GetHd|Is0])} of
+        {{Hd0,Is},{Tl0,_}} ->
+            [GetHd|opt(Is)];
+        {{Hd,Is},{Tl0,_}} ->
+            [{set,Hd,Cons,get_hd}|opt(Is)];
+        {{_,_},{Tl,Is}} ->
+            [{set,Tl,Cons,get_tl}|opt(Is)]
+    end;
 opt([{set,Ds0,Ss,Op}|Is0]) ->
     {Ds,Is} = opt_moves(Ds0, Is0),
     [{set,Ds,Ss,Op}|opt(Is)];
-opt([{'%live',_,_}=I|Is]) ->
+opt([{'%anno',_}=I|Is]) ->
     [I|opt(Is)];
 opt([]) -> [].
 
@@ -245,17 +289,6 @@ opt_moves([D0]=Ds, Is0) ->
     case opt_move(D0, Is0) of
 	not_possible -> {Ds,Is0};
 	{D1,Is} -> {[D1],Is}
-    end;
-opt_moves([X0,Y0], Is0) ->
-    {X,Is2} = case opt_move(X0, Is0) of
-		  not_possible -> {X0,Is0};
-		  {Y0,_} -> {X0,Is0};
-		  {_X1,_Is1} = XIs1 -> XIs1
-	      end,
-    case opt_move(Y0, Is2) of
-	not_possible -> {[X,Y0],Is2};
-	{X,_} -> {[X,Y0],Is2};
-	{Y,Is} -> {[X,Y],Is}
     end.
 
 %% opt_move(Dest, [Instruction]) -> {UpdatedDest,[Instruction]} | not_possible
@@ -269,7 +302,7 @@ opt_move(Dest, Is) ->
 opt_move_1(R, [{set,[D],[R],move}|Is0], Acc) ->
     %% Provided that the source register is killed by instructions
     %% that follow, the optimization is safe.
-    case eliminate_use_of_from_reg(Is0, R, D, []) of
+    case eliminate_use_of_from_reg(Is0, R, D) of
 	{yes,Is} -> opt_move_rev(D, Acc, Is);
 	no -> not_possible
     end;
@@ -327,13 +360,21 @@ opt_tuple_element_1([{set,_,_,{alloc,_,_}}|_], _, _, _) ->
 opt_tuple_element_1([{set,_,_,{try_catch,_,_}}|_], _, _, _) ->
     no;
 opt_tuple_element_1([{set,[D],[S],move}|Is0], I0, {_,S}, Acc) ->
-    case eliminate_use_of_from_reg(Is0, S, D, []) of
+    case eliminate_use_of_from_reg(Is0, S, D) of
 	no ->
 	    no;
-	{yes,Is} ->
+	{yes,Is1} ->
 	    {set,[S],Ss,Op} = I0,
 	    I = {set,[D],Ss,Op},
-	    {yes,reverse(Acc, [I|Is])}
+            case opt_move_rev(S, Acc, [I|Is1]) of
+                not_possible ->
+                    %% Not safe because the move of the
+                    %% get_tuple_element instruction would cause the
+                    %% result of a previous instruction to be ignored.
+                    no;
+                {_,Is} ->
+                    {yes,Is}
+            end
     end;
 opt_tuple_element_1([{set,Ds,Ss,_}=I|Is], MovedI, {S,D}=Regs, Acc) ->
     case member(S, Ds) orelse member(D, Ss) of
@@ -369,6 +410,14 @@ is_killed_or_used(R, {set,Ss,Ds,_}) ->
 %%  that FromRegister is still used and that the optimization is not
 %%  possible.
 
+eliminate_use_of_from_reg(Is, From, To) ->
+    try
+        eliminate_use_of_from_reg(Is, From, To, [])
+    catch
+        throw:not_possible ->
+            no
+    end.
+
 eliminate_use_of_from_reg([{set,_,_,{alloc,Live,_}}|_]=Is0, {x,X}, _, Acc) ->
     if
 	X < Live ->
@@ -377,21 +426,32 @@ eliminate_use_of_from_reg([{set,_,_,{alloc,Live,_}}|_]=Is0, {x,X}, _, Acc) ->
 	    {yes,reverse(Acc, Is0)}
     end;
 eliminate_use_of_from_reg([{set,Ds,Ss0,Op}=I0|Is], From, To, Acc) ->
+    ensure_safe_tuple(I0, To),
     I = case member(From, Ss0) of
-	    true ->
-		Ss = [case S of
-			  From -> To;
-			  _ -> S
-		      end || S <- Ss0],
-		{set,Ds,Ss,Op};
-	    false ->
-		I0
-	end,
+            true ->
+                Ss = [case S of
+                          From -> To;
+                          _ -> S
+                      end || S <- Ss0],
+                {set,Ds,Ss,Op};
+            false ->
+                I0
+        end,
     case member(From, Ds) of
-	true ->
-	    {yes,reverse(Acc, [I|Is])};
-	false ->
-	    eliminate_use_of_from_reg(Is, From, To, [I|Acc])
+        true ->
+            {yes,reverse(Acc, [I|Is])};
+        false ->
+            case member(To, Ds) of
+                true ->
+                    case beam_utils:is_killed_block(From, Is) of
+                        true ->
+                            {yes,reverse(Acc, [I|Is])};
+                        false ->
+                            no
+                    end;
+                false ->
+                    eliminate_use_of_from_reg(Is, From, To, [I|Acc])
+            end
     end;
 eliminate_use_of_from_reg([I]=Is, From, _To, Acc) ->
     case beam_utils:is_killed_block(From, [I]) of
@@ -401,31 +461,51 @@ eliminate_use_of_from_reg([I]=Is, From, _To, Acc) ->
 	    no
     end.
 
+ensure_safe_tuple({set,[To],[],{put_tuple,_}}, To) ->
+    throw(not_possible);
+ensure_safe_tuple(_, _) -> ok.
+
+%% opt_allocs(Instructions) -> Instructions.  Optimize allocate
+%%  instructions inside blocks. If safe, replace an allocate_zero
+%%  instruction with the slightly cheaper allocate instruction.
+
+opt_allocs(Is) ->
+    D = beam_utils:index_labels(Is),
+    opt_allocs_1(Is, D).
+
+opt_allocs_1([{block,Bl0}|Is], D) ->
+    Bl = opt_alloc(Bl0, {D,Is}),
+    [{block,Bl}|opt_allocs_1(Is, D)];
+opt_allocs_1([I|Is], D) ->
+    [I|opt_allocs_1(Is, D)];
+opt_allocs_1([], _) -> [].
+
 %% opt_alloc(Instructions) -> Instructions'
 %%  Optimises all allocate instructions.
 
 opt_alloc([{set,[],[],{alloc,Live0,Info0}},
-	   {set,[],[],{alloc,Live,Info}}|Is]) ->
+           {set,[],[],{alloc,Live,Info}}|Is], D) ->
     Live = Live0,				%Assertion.
     Alloc = combine_alloc(Info0, Info),
     I = {set,[],[],{alloc,Live,Alloc}},
-    opt_alloc([I|Is]);
-opt_alloc([{set,[],[],{alloc,R,{_,Ns,Nh,[]}}}|Is]) ->
-    [{set,[],[],opt_alloc(Is, Ns, Nh, R)}|Is];
-opt_alloc([I|Is]) -> [I|opt_alloc(Is)];
-opt_alloc([]) -> [].
+    opt_alloc([I|Is], D);
+opt_alloc([{set,[],[],{alloc,R,{_,Ns,Nh,[]}}}|Is], D) ->
+    [{set,[],[],opt_alloc(Is, D, Ns, Nh, R)}|Is];
+opt_alloc([I|Is], D) -> [I|opt_alloc(Is, D)];
+opt_alloc([], _) -> [].
 
 combine_alloc({_,Ns,Nh1,Init}, {_,nostack,Nh2,[]})  ->
     {zero,Ns,beam_utils:combine_heap_needs(Nh1, Nh2),Init}.
-	
+
 %% opt_alloc(Instructions, FrameSize, HeapNeed, LivingRegs) -> [Instr]
 %%  Generates the optimal sequence of instructions for
 %%  allocating and initalizing the stack frame and needed heap.
 
-opt_alloc(_Is, nostack, Nh, LivingRegs) ->
+opt_alloc(_Is, _D, nostack, Nh, LivingRegs) ->
     {alloc,LivingRegs,{nozero,nostack,Nh,[]}};
-opt_alloc(Is, Ns, Nh, LivingRegs) ->
-    InitRegs = init_yreg(Is, 0),
+opt_alloc(Bl, {D,OuterIs}, Ns, Nh, LivingRegs) ->
+    Is = [{block,Bl}|OuterIs],
+    InitRegs = init_yregs(Ns, Is, D),
     case count_ones(InitRegs) of
 	N when N*2 > Ns ->
 	    {alloc,LivingRegs,{nozero,Ns,Nh,gen_init(Ns, InitRegs)}};
@@ -441,19 +521,14 @@ gen_init(Fs, Regs, Y, Acc) when Regs band 1 =:= 0 ->
 gen_init(Fs, Regs, Y, Acc) ->
     gen_init(Fs, Regs bsr 1, Y+1, Acc).
 
-%% init_yreg(Instructions, RegSet) -> RegSetInitialized
-%%  Calculate the set of initialized y registers.
-
-init_yreg([{set,_,_,{bif,_,_}}|_], Reg) -> Reg;
-init_yreg([{set,_,_,{alloc,_,{gc_bif,_,_}}}|_], Reg) -> Reg;
-init_yreg([{set,_,_,{alloc,_,{put_map,_,_}}}|_], Reg) -> Reg;
-init_yreg([{set,Ds,_,_}|Is], Reg) -> init_yreg(Is, add_yregs(Ds, Reg));
-init_yreg(_Is, Reg) -> Reg.
-
-add_yregs(Ys, Reg) -> foldl(fun(Y, R0) -> add_yreg(Y, R0) end, Reg, Ys).
-    
-add_yreg({y,Y}, Reg) -> Reg bor (1 bsl Y);
-add_yreg(_, Reg)     -> Reg.
+init_yregs(Y, Is, D) when Y >= 0 ->
+    case beam_utils:is_killed({y,Y}, Is, D) of
+        true ->
+            (1 bsl Y) bor init_yregs(Y-1, Is, D);
+        false ->
+            init_yregs(Y-1, Is, D)
+    end;
+init_yregs(_, _, _) -> 0.
 
 count_ones(Bits) -> count_ones(Bits, 0).
 count_ones(0, Acc) -> Acc;
@@ -463,16 +538,34 @@ count_ones(Bits, Acc) ->
 %% Calculate the new number of live registers when we move an allocate
 %% instruction upwards, passing a 'set' instruction.
 
-alloc_live_regs({set,Ds,Ss,_}, Regs0) ->
+alloc_live_regs({set,Ds,Ss,_}, Is, Regs0) ->
     Rset = x_live(Ss, x_dead(Ds, (1 bsl Regs0)-1)),
-    live_regs(0, Rset).
+    Live = live_regs(0, Rset),
+    case ensure_contiguous(Rset, Live) of
+        not_possible ->
+            %% Liveness information (looking forward in the
+            %% instruction stream) can't prove that moving this
+            %% allocation instruction is safe. Now use the annotation
+            %% of defined registers at the beginning of the current
+            %% block to see whether moving would be safe.
+            Def0 = defined_regs(Is, 0),
+            Def = Def0 band ((1 bsl Live) - 1),
+            ensure_contiguous(Rset bor Def, Live);
+        Live ->
+            %% Safe based on liveness information.
+            Live
+    end.
 
 live_regs(N, 0) ->
     N;
-live_regs(N, Regs) when Regs band 1 =:= 1 ->
-    live_regs(N+1, Regs bsr 1);
-live_regs(_, _) ->
-    not_possible.
+live_regs(N, Regs) ->
+    live_regs(N+1, Regs bsr 1).
+
+ensure_contiguous(Regs, Live) ->
+    case (1 bsl Live) - 1 of
+        Regs -> Live;
+        _ -> not_possible
+    end.
 
 x_dead([{x,N}|Rs], Regs) -> x_dead(Rs, Regs band (bnot (1 bsl N)));
 x_dead([_|Rs], Regs) -> x_dead(Rs, Regs);
@@ -481,3 +574,120 @@ x_dead([], Regs) -> Regs.
 x_live([{x,N}|Rs], Regs) -> x_live(Rs, Regs bor (1 bsl N));
 x_live([_|Rs], Regs) -> x_live(Rs, Regs);
 x_live([], Regs) -> Regs.
+
+%% defined_regs(ReversedInstructions) -> RegBitmap.
+%%  Given a reversed instruction stream, determine the
+%%  the registers that are defined.
+
+defined_regs([{'%anno',{def,Def}}|_], Regs) ->
+    Def bor Regs;
+defined_regs([{set,Ds,_,{alloc,Live,_}}|_], Regs) ->
+    x_live(Ds, Regs bor ((1 bsl Live) - 1));
+defined_regs([{set,Ds,_,_}|Is], Regs) ->
+    defined_regs(Is, x_live(Ds, Regs)).
+
+%%%
+%%% Do local common sub expression elimination (CSE) in each block.
+%%%
+
+local_cse([{block,Bl0}|Is]) ->
+    Bl = cse_block(Bl0, orddict:new(), []),
+    [{block,Bl}|local_cse(Is)];
+local_cse([I|Is]) ->
+    [I|local_cse(Is)];
+local_cse([]) -> [].
+
+cse_block([I|Is], Es0, Acc0) ->
+    Es1 = cse_clear(I, Es0),
+    case cse_expr(I) of
+        none ->
+            %% Instruction is not suitable for CSE.
+            cse_block(Is, Es1, [I|Acc0]);
+        {ok,D,Expr} ->
+            %% Suitable instruction. First update the dictionary of
+            %% suitable expressions for the next iteration.
+            Es = cse_add(D, Expr, Es1),
+
+            %% Search for a previous identical expression.
+            case cse_find(Expr, Es0) of
+                error ->
+                    %% Nothing found
+                    cse_block(Is, Es, [I|Acc0]);
+                Src ->
+                    %% Use the previously calculated result.
+                    %% Also eliminate any line instruction.
+                    Move = {set,[D],[Src],move},
+                    case Acc0 of
+                        [{set,_,_,{line,_}}|Acc] ->
+                            cse_block(Is, Es, [Move|Acc]);
+                        [_|_] ->
+                            cse_block(Is, Es, [Move|Acc0])
+                    end
+            end
+    end;
+cse_block([], _, Acc) ->
+    reverse(Acc).
+
+%% cse_find(Expr, Expressions) -> error | Register.
+%%  Find a previously evaluated expression whose result can be reused,
+%%  or return 'error' if no such expression is found.
+
+cse_find(Expr, Es) ->
+    case orddict:find(Expr, Es) of
+        {ok,{Src,_}} -> Src;
+        error -> error
+    end.
+
+cse_expr({set,[D],Ss,{bif,N,_}}) ->
+    case D of
+        {fr,_} ->
+            %% There are too many things that can go wrong.
+            none;
+        _ ->
+            {ok,D,{{bif,N},Ss}}
+    end;
+cse_expr({set,[D],Ss,{alloc,_,{gc_bif,N,_}}}) ->
+    {ok,D,{{gc_bif,N},Ss}};
+cse_expr({set,[D],Ss,put_list}) ->
+    {ok,D,{put_list,Ss}};
+cse_expr(_) -> none.
+
+%% cse_clear(Instr, Expressions0) -> Expressions.
+%%  Remove all previous expressions that will become
+%%  invalid when this instruction is executed. Basically,
+%%  an expression is no longer safe to reuse when the
+%%  register it has been stored to has been modified, killed,
+%%  or if any of the source operands have changed.
+
+cse_clear({set,Ds,_,{alloc,Live,_}}, Es) ->
+    cse_clear_1(Es, Live, Ds);
+cse_clear({set,Ds,_,_}, Es) ->
+    cse_clear_1(Es, all, Ds).
+
+cse_clear_1(Es, Live, Ds0) ->
+    Ds = ordsets:from_list(Ds0),
+    [E || E <- Es, cse_is_safe(E, Live, Ds)].
+
+cse_is_safe({_,{Dst,Interfering}}, Live, Ds) ->
+    ordsets:is_disjoint(Interfering, Ds) andalso
+        case Dst of
+            {x,X} ->
+                X < Live;
+            _ ->
+                true
+        end.
+
+%% cse_add(Dest, Expr, Expressions0) -> Expressions.
+%%  Provided that it is safe, add a new expression to the dictionary
+%%  of already evaluated expressions.
+
+cse_add(D, {_,Ss}=Expr, Es) ->
+    case member(D, Ss) of
+        false ->
+            Interfering = ordsets:from_list([D|Ss]),
+            orddict:store(Expr, {D,Interfering}, Es);
+        true ->
+            %% Unsafe because the instruction overwrites one of
+            %% source operands.
+            Es
+    end.
diff --git a/lib/compiler/src/beam_bs.erl b/lib/compiler/src/beam_bs.erl
index beb055b23d..14cedbb582 100644
--- a/lib/compiler/src/beam_bs.erl
+++ b/lib/compiler/src/beam_bs.erl
@@ -38,8 +38,7 @@ function({function,Name,Arity,CLabel,Is0}, Lc0) ->
 	{Is,Lc} = bsm_opt(Is1, Lc0),
 	{{function,Name,Arity,CLabel,Is},Lc}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
diff --git a/lib/compiler/src/beam_bsm.erl b/lib/compiler/src/beam_bsm.erl
index 9a4e7fb133..9f3b9d788f 100644
--- a/lib/compiler/src/beam_bsm.erl
+++ b/lib/compiler/src/beam_bsm.erl
@@ -105,8 +105,7 @@ function({function,Name,Arity,Entry,Is}, FIndex) ->
 	D = #btb{f=FIndex,index=Index},
 	{function,Name,Arity,Entry,btb_opt_1(Is, D, [])}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -125,20 +124,21 @@ btb_opt_1([{test,bs_get_binary2,F,_,[Reg,{atom,all},U,Fs],Reg}=I0|Is], D, Acc0)
 		  end,
 	    btb_opt_1(Is, D, Acc)
     end;
-btb_opt_1([{test,bs_get_binary2,F,_,[Ctx,{atom,all},U,Fs],Dst}=I0|Is], D, Acc0) ->
-    case btb_reaches_match(Is, [Ctx,Dst], D) of
+btb_opt_1([{test,bs_get_binary2,F,_,[Ctx,{atom,all},U,Fs],Dst}=I0|Is0], D, Acc0) ->
+    case btb_reaches_match(Is0, [Ctx,Dst], D) of
 	{error,Reason} ->
 	    Comment = btb_comment_no_opt(Reason, Fs),
-	    btb_opt_1(Is, D, [Comment,I0|Acc0]);
+	    btb_opt_1(Is0, D, [Comment,I0|Acc0]);
 	{ok,MustSave} when U =:= 1 ->
 	    Comment = btb_comment_opt(Fs),
-	    Acc1 = btb_gen_save(MustSave, Ctx, [Comment|Acc0]),
-	    Acc = [{move,Ctx,Dst}|Acc1],
+            Acc = btb_gen_save(MustSave, Ctx, [Comment|Acc0]),
+            Is = prepend_move(Ctx, Dst, Is0),
 	    btb_opt_1(Is, D, Acc);
 	{ok,MustSave} ->
 	    Comment = btb_comment_opt(Fs),
 	    Acc1 = btb_gen_save(MustSave, Ctx, [Comment|Acc0]),
-	    Acc = [{move,Ctx,Dst},{test,bs_test_unit,F,[Ctx,U]}|Acc1],
+            Acc = [{test,bs_test_unit,F,[Ctx,U]}|Acc1],
+            Is = prepend_move(Ctx, Dst, Is0),
 	    btb_opt_1(Is, D, Acc)
     end;
 btb_opt_1([I|Is], D, Acc) ->
@@ -151,6 +151,12 @@ btb_gen_save(true, Reg, Acc) ->
     [{bs_save2,Reg,{atom,start}}|Acc];
 btb_gen_save(false, _, Acc) -> Acc.
 
+prepend_move(Ctx, Dst, [{block,Bl0}|Is]) ->
+    Bl = [{set,[Dst],[Ctx],move}|Bl0],
+    [{block,Bl}|Is];
+prepend_move(Ctx, Dst, Is) ->
+    [{move,Ctx,Dst}|Is].
+
 %% btb_reaches_match([Instruction], [Register], D) ->
 %%   {ok,MustSave}|{error,Reason}
 %%
diff --git a/lib/compiler/src/beam_clean.erl b/lib/compiler/src/beam_clean.erl
index e094c2c320..955c128699 100644
--- a/lib/compiler/src/beam_clean.erl
+++ b/lib/compiler/src/beam_clean.erl
@@ -24,7 +24,7 @@
 -export([module/2]).
 -export([bs_clean_saves/1]).
 -export([clean_labels/1]).
--import(lists, [foldl/3,reverse/1,filter/2]).
+-import(lists, [foldl/3,reverse/1]).
 
 -spec module(beam_utils:module_code(), [compile:option()]) ->
                     {'ok',beam_utils:module_code()}.
@@ -254,7 +254,7 @@ bs_restores([_|Is], Dict) ->
 bs_restores([], Dict) -> Dict.
     
 %% Pass 2.
-bs_replace([{test,bs_start_match2,F,Live,[Src,Ctx],CtxR}|T], Dict, Acc) when is_atom(Ctx) ->
+bs_replace([{test,bs_start_match2,F,Live,[Src,{context,Ctx}],CtxR}|T], Dict, Acc) ->
     Slots = case gb_trees:lookup(Ctx, Dict) of
 		{value,Slots0} -> Slots0;
 		none -> 0
@@ -303,8 +303,21 @@ maybe_remove_lines(Fs, Opts) ->
     end.
 
 remove_lines([{function,N,A,Lbl,Is0}|T]) ->
-    Is = filter(fun({line,_}) -> false;
-		   (_)  -> true
-		end, Is0),
+    Is = remove_lines_fun(Is0),
     [{function,N,A,Lbl,Is}|remove_lines(T)];
 remove_lines([]) -> [].
+
+remove_lines_fun([{line,_}|Is]) ->
+    remove_lines_fun(Is);
+remove_lines_fun([{block,Bl0}|Is]) ->
+    Bl = remove_lines_block(Bl0),
+    [{block,Bl}|remove_lines_fun(Is)];
+remove_lines_fun([I|Is]) ->
+    [I|remove_lines_fun(Is)];
+remove_lines_fun([]) -> [].
+
+remove_lines_block([{set,_,_,{line,_}}|Is]) ->
+    remove_lines_block(Is);
+remove_lines_block([I|Is]) ->
+    [I|remove_lines_block(Is)];
+remove_lines_block([]) -> [].
diff --git a/lib/compiler/src/beam_dead.erl b/lib/compiler/src/beam_dead.erl
index d379fdc4eb..dbbaae05eb 100644
--- a/lib/compiler/src/beam_dead.erl
+++ b/lib/compiler/src/beam_dead.erl
@@ -56,8 +56,7 @@ function({function,Name,Arity,CLabel,Is0}, Lc0) ->
 	Is = move_move_into_block(Is3, []),
 	{{function,Name,Arity,CLabel,Is},Lc}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -272,7 +271,8 @@ backward([{jump,{f,To0}},{move,Src,Reg}=Move|Is], D, Acc) ->
     end;
 backward([{jump,{f,To}}=J|[{bif,Op,{f,BifFail},Ops,Reg}|Is]=Is0], D, Acc) ->
     try replace_comp_op(To, Reg, Op, Ops, D) of
-	I -> backward(Is, D, I++Acc)
+	{Test,Jump} ->
+            backward([Jump,Test|Is], D, Acc)
     catch
 	throw:not_possible ->
 	    case To =:= BifFail of
@@ -294,24 +294,25 @@ backward([{jump,{f,To}}=J|[{gc_bif,_,{f,To},_,_,_Dst}|Is]], D, Acc) ->
     %% register is initialized, and it is therefore no need to test
     %% for liveness of the destination register at label To.
     backward([J|Is], D, Acc);
-backward([{test,bs_start_match2,F,Live,[R,_]=Args,Ctxt}|Is], D,
-	 [{test,bs_match_string,F,[Ctxt,Bs]},
-	  {test,bs_test_tail2,F,[Ctxt,0]}|Acc0]=Acc) ->
+backward([{test,bs_start_match2,F,Live,[Src,_]=Args,Ctxt}|Is], D, Acc0) ->
     {f,To0} = F,
-    case beam_utils:is_killed(Ctxt, Acc0, D) of
-	true ->
-	    To = shortcut_bs_context_to_binary(To0, R, D),
-	    Eq = {test,is_eq_exact,{f,To},[R,{literal,Bs}]},
-	    backward(Is, D, [Eq|Acc0]);
-	false ->
-	    To = shortcut_bs_start_match(To0, R, D),
-	    I = {test,bs_start_match2,{f,To},Live,Args,Ctxt},
-	    backward(Is, D, [I|Acc])
+    case test_bs_literal(F, Ctxt, D, Acc0) of
+        {none,Acc} ->
+            %% Ctxt killed immediately after bs_start_match2.
+            To = shortcut_bs_context_to_binary(To0, Src, D),
+            I = {test,is_bitstr,{f,To},[Src]},
+            backward(Is, D, [I|Acc]);
+        {Literal,Acc} ->
+            %% Ctxt killed after matching a literal.
+            To = shortcut_bs_context_to_binary(To0, Src, D),
+            Eq = {test,is_eq_exact,{f,To},[Src,{literal,Literal}]},
+            backward(Is, D, [Eq|Acc]);
+        not_killed ->
+            %% Ctxt not killed. Not much to do.
+            To = shortcut_bs_start_match(To0, Src, D),
+            I = {test,bs_start_match2,{f,To},Live,Args,Ctxt},
+            backward(Is, D, [I|Acc0])
     end;
-backward([{test,bs_start_match2,{f,To0},Live,[Src|_]=Info,Dst}|Is], D, Acc) ->
-    To = shortcut_bs_start_match(To0, Src, D),
-    I = {test,bs_start_match2,{f,To},Live,Info,Dst},
-    backward(Is, D, [I|Acc]);
 backward([{test,Op,{f,To0},Ops0}|Is], D, Acc) ->
     To1 = shortcut_bs_test(To0, Is, D),
     To2 = shortcut_label(To1, D),
@@ -446,7 +447,7 @@ prune_redundant([], _) -> [].
 replace_comp_op(To, Reg, Op, Ops, D) ->
     False = comp_op_find_shortcut(To, Reg, {atom,false}, D),
     True = comp_op_find_shortcut(To, Reg, {atom,true}, D),
-    [bif_to_test(Op, Ops, False),{jump,{f,True}}].
+    {bif_to_test(Op, Ops, False),{jump,{f,True}}}.
 
 comp_op_find_shortcut(To0, Reg, Val, D) ->
     case shortcut_select_label(To0, Reg, Val, D) of
@@ -483,15 +484,22 @@ not_possible() -> throw(not_possible).
 %%   F1:  is_eq_exact F2 Reg Lit2          F1: is_eq_exact F2 Reg Lit2
 %%   L2:  ....				   L2:
 %%
-combine_eqs(To, [Reg,{Type,_}=Lit1]=Ops, D, [{label,L1}|_])
-  when Type =:= atom; Type =:= integer ->
+combine_eqs(To, [Reg,{Type,_}=Lit1]=Ops, D, Acc)
+    when Type =:= atom; Type =:= integer ->
+    Next = case Acc of
+               [{label,Lbl}|_] -> Lbl;
+               [{jump,{f,Lbl}}|_] -> Lbl
+           end,
     case beam_utils:code_at(To, D) of
 	[{test,is_eq_exact,{f,F2},[Reg,{Type,_}=Lit2]},
 	 {label,L2}|_] when Lit1 =/= Lit2 ->
-	    {select,select_val,Reg,{f,F2},[Lit1,{f,L1},Lit2,{f,L2}]};
+	    {select,select_val,Reg,{f,F2},[Lit1,{f,Next},Lit2,{f,L2}]};
+	[{test,is_eq_exact,{f,F2},[Reg,{Type,_}=Lit2]},
+	 {jump,{f,L2}}|_] when Lit1 =/= Lit2 ->
+	    {select,select_val,Reg,{f,F2},[Lit1,{f,Next},Lit2,{f,L2}]};
 	[{select,select_val,Reg,{f,F2},[{Type,_}|_]=List0}|_] ->
 	    List = remove_from_list(Lit1, List0),
-	    {select,select_val,Reg,{f,F2},[Lit1,{f,L1}|List]};
+	    {select,select_val,Reg,{f,F2},[Lit1,{f,Next}|List]};
 	_Is ->
 	    {test,is_eq_exact,{f,To},Ops}
 	end;
@@ -504,6 +512,22 @@ remove_from_list(Lit, [Val,{f,_}=Fail|T]) ->
     [Val,Fail|remove_from_list(Lit, T)];
 remove_from_list(_, []) -> [].
 
+
+test_bs_literal(F, Ctxt, D,
+                [{test,bs_match_string,F,[Ctxt,Bs]},
+                 {test,bs_test_tail2,F,[Ctxt,0]}|Acc]) ->
+    test_bs_literal_1(Ctxt, Acc, D, Bs);
+test_bs_literal(F, Ctxt, D, [{test,bs_test_tail2,F,[Ctxt,0]}|Acc]) ->
+    test_bs_literal_1(Ctxt, Acc, D, <<>>);
+test_bs_literal(_, Ctxt, D, Acc) ->
+    test_bs_literal_1(Ctxt, Acc, D, none).
+
+test_bs_literal_1(Ctxt, Is, D, Literal) ->
+    case beam_utils:is_killed(Ctxt, Is, D) of
+        true -> {Literal,Is};
+        false -> not_killed
+    end.
+
 %% shortcut_bs_test(TargetLabel, ReversedInstructions, D) -> TargetLabel'
 %%  Try to shortcut the failure label for bit syntax matching.
 
diff --git a/lib/compiler/src/beam_disasm.erl b/lib/compiler/src/beam_disasm.erl
index 8fd0b36d05..a68c4b5367 100644
--- a/lib/compiler/src/beam_disasm.erl
+++ b/lib/compiler/src/beam_disasm.erl
@@ -163,8 +163,8 @@ pp_instr(I) ->
 
 file(File) ->
     try process_chunks(File)
-    catch error:Reason ->
-	    {error,?MODULE,{internal,{Reason,erlang:get_stacktrace()}}}
+    catch error:Reason:Stack ->
+            {error,?MODULE,{internal,{Reason,Stack}}}
     end.
 
 %%-----------------------------------------------------------------------
@@ -719,42 +719,6 @@ resolve_inst({wait,[Lbl]},_,_,_) ->
     {wait,Lbl};
 resolve_inst({wait_timeout,[Lbl,Int]},_,_,_) ->
     {wait_timeout,Lbl,resolve_arg(Int)};
-resolve_inst({m_plus,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'+',W,[SrcR1,SrcR2],DstR};
-resolve_inst({m_minus,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'-',W,[SrcR1,SrcR2],DstR};
-resolve_inst({m_times,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'*',W,[SrcR1,SrcR2],DstR};
-resolve_inst({m_div,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'/',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_div,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'div',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_rem,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'rem',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_band,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'band',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_bor,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'bor',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_bxor,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'bxor',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_bsl,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'bsl',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_bsr,Args},_,_,_) ->
-    [W,SrcR1,SrcR2,DstR] = resolve_args(Args),
-    {arithbif,'bsr',W,[SrcR1,SrcR2],DstR};
-resolve_inst({int_bnot,Args},_,_,_) ->
-    [W,SrcR,DstR] = resolve_args(Args),
-    {arithbif,'bnot',W,[SrcR],DstR};
 resolve_inst({is_lt=I,Args0},_,_,_) ->
     [L|Args] = resolve_args(Args0),
     {test,I,L,Args};
@@ -800,9 +764,6 @@ resolve_inst({is_nil=I,Args0},_,_,_) ->
 resolve_inst({is_binary=I,Args0},_,_,_) ->
     [L|Args] = resolve_args(Args0),
     {test,I,L,Args};
-resolve_inst({is_constant=I,Args0},_,_,_) ->
-    [L|Args] = resolve_args(Args0),
-    {test,I,L,Args};
 resolve_inst({is_list=I,Args0},_,_,_) ->
     [L|Args] = resolve_args(Args0),
     {test,I,L,Args};
@@ -840,11 +801,6 @@ resolve_inst({get_tuple_element,[Src,{u,Off},Dst]},_,_,_) ->
     {get_tuple_element,resolve_arg(Src),Off,resolve_arg(Dst)};
 resolve_inst({set_tuple_element,[Src,Dst,{u,Off}]},_,_,_) ->
     {set_tuple_element,resolve_arg(Src),resolve_arg(Dst),Off};
-resolve_inst({put_string,[{u,Len},{u,Off},Dst]},_,Strings,_) ->
-    String = if Len > 0 -> binary_to_list(Strings, Off+1, Off+Len);
-		true -> ""
-	     end,
-    {put_string,Len,{string,String},Dst};
 resolve_inst({put_list,[Src1,Src2,Dst]},_,_,_) ->
     {put_list,resolve_arg(Src1),resolve_arg(Src2),Dst};
 resolve_inst({put_tuple,[{u,Arity},Dst]},_,_,_) ->
@@ -859,9 +815,6 @@ resolve_inst({case_end,[X]},_,_,_) ->
     {case_end,resolve_arg(X)};
 resolve_inst({call_fun,[{u,N}]},_,_,_) ->
     {call_fun,N};
-resolve_inst({make_fun,Args},_,_,Lbls) ->
-    [{f,L},Magic,FreeVars] = resolve_args(Args),
-    {make_fun,lookup(L,Lbls),Magic,FreeVars};
 resolve_inst({is_function=I,Args0},_,_,_) ->
     [L|Args] = resolve_args(Args0),
     {test,I,L,Args};
@@ -870,30 +823,6 @@ resolve_inst({call_ext_only,[{u,N},{u,MFAix}]},Imports,_,_) ->
 %%
 %% Instructions for handling binaries added in R7A & R7B
 %%
-resolve_inst({bs_start_match,[F,Reg]},_,_,_) ->
-    {bs_start_match,F,Reg};
-resolve_inst({bs_get_integer=I,[Lbl,Arg2,{u,N},{u,U},Arg5]},_,_,_) ->
-    [A2,A5] = resolve_args([Arg2,Arg5]),
-    {test,I,Lbl,[A2,N,decode_field_flags(U),A5]};
-resolve_inst({bs_get_float=I,[Lbl,Arg2,{u,N},{u,U},Arg5]},_,_,_) ->
-    [A2,A5] = resolve_args([Arg2,Arg5]),
-    {test,I,Lbl,[A2,N,decode_field_flags(U),A5]};
-resolve_inst({bs_get_binary=I,[Lbl,Arg2,{u,N},{u,U},Arg5]},_,_,_) ->
-    [A2,A5] = resolve_args([Arg2,Arg5]),
-    {test,I,Lbl,[A2,N,decode_field_flags(U),A5]};
-resolve_inst({bs_skip_bits,[Lbl,Arg2,{u,N},{u,U}]},_,_,_) ->
-    A2 = resolve_arg(Arg2),
-    {test,bs_skip_bits,Lbl,[A2,N,decode_field_flags(U)]};
-resolve_inst({bs_test_tail,[F,{u,N}]},_,_,_) ->
-    {test,bs_test_tail,F,[N]};
-resolve_inst({bs_save,[{u,N}]},_,_,_) ->
-    {bs_save,N};
-resolve_inst({bs_restore,[{u,N}]},_,_,_) ->
-    {bs_restore,N};
-resolve_inst({bs_init,[{u,N},{u,U}]},_,_,_) ->
-    {bs_init,N,decode_field_flags(U)};
-resolve_inst({bs_final,[F,X]},_,_,_) ->
-    {bs_final,F,X};
 resolve_inst({bs_put_integer,[Lbl,Arg2,{u,N},{u,U},Arg5]},_,_,_) ->
     [A2,A5] = resolve_args([Arg2,Arg5]),
     {bs_put_integer,Lbl,A2,N,decode_field_flags(U),A5};
@@ -908,8 +837,6 @@ resolve_inst({bs_put_string,[{u,Len},{u,Off}]},_,Strings,_) ->
 		true -> ""
 	     end,
     {bs_put_string,Len,{string,String}};
-resolve_inst({bs_need_buf,[{u,N}]},_,_,_) ->
-    {bs_need_buf,N};
 
 %%
 %% Instructions for handling floating point numbers added in June 2001 (R8).
@@ -961,9 +888,6 @@ resolve_inst({raise,[_Reg1,_Reg2]=Regs},_,_,_) ->
 resolve_inst({bs_init2,[Lbl,Arg2,{u,W},{u,R},{u,F},Arg6]},_,_,_) ->
     [A2,A6] = resolve_args([Arg2,Arg6]),
     {bs_init2,Lbl,A2,W,R,decode_field_flags(F),A6};
-resolve_inst({bs_bits_to_bytes,[Lbl,Arg2,Arg3]},_,_,_) ->
-    [A2,A3] = resolve_args([Arg2,Arg3]),
-    {bs_bits_to_bytes,Lbl,A2,A3};
 resolve_inst({bs_add=I,[Lbl,Arg2,Arg3,Arg4,Arg5]},_,_,_) ->
     [A2,A3,A4,A5] = resolve_args([Arg2,Arg3,Arg4,Arg5]),
     {I,Lbl,[A2,A3,A4],A5};
@@ -1041,12 +965,6 @@ resolve_inst({gc_bif3,Args},Imports,_,_) ->
     {gc_bif,BifName,F,Live,[A1,A2,A3],Reg};
 
 %%
-%% New instructions for creating non-byte aligned binaries.
-%%
-resolve_inst({bs_final2,[X,Y]},_,_,_) ->
-    {bs_final2,X,Y};
-
-%%
 %% R11B-5.
 %% 
 resolve_inst({is_bitstr=I,Args0},_,_,_) ->
@@ -1165,6 +1083,19 @@ resolve_inst({get_map_elements,Args0},_,_,_) ->
     {get_map_elements,FLbl,Src,{list,List}};
 
 %%
+%% OTP 21.
+%%
+
+resolve_inst({build_stacktrace,[]},_,_,_) ->
+    build_stacktrace;
+resolve_inst({raw_raise,[]},_,_,_) ->
+    raw_raise;
+resolve_inst({get_hd,[Src,Dst]},_,_,_) ->
+    {get_hd,Src,Dst};
+resolve_inst({get_tl,[Src,Dst]},_,_,_) ->
+    {get_tl,Src,Dst};
+
+%%
 %% Catches instructions that are not yet handled.
 %%
 resolve_inst(X,_,_,_) -> ?exit({resolve_inst,X}).
diff --git a/lib/compiler/src/beam_disasm.hrl b/lib/compiler/src/beam_disasm.hrl
index d968cd9587..c3326c15a0 100644
--- a/lib/compiler/src/beam_disasm.hrl
+++ b/lib/compiler/src/beam_disasm.hrl
@@ -26,7 +26,8 @@
 %%      IT SHOULD BE MOVED TO A FILE THAT DEFINES (AND EXPORTS)
 %%      PROPER TYPES FOR THE SET OF BEAM INSTRUCTIONS.
 %%
--type beam_instr() :: 'bs_init_writable' | 'fclearerror' | 'if_end'
+-type beam_instr() :: 'bs_init_writable' | 'build_stacktrace'
+                    | 'fclearerror' | 'if_end' | 'raw_raise'
                     | 'remove_message' | 'return' | 'send' | 'timeout'
                     | tuple().  %% XXX: Very underspecified - FIX THIS
 
diff --git a/lib/compiler/src/beam_except.erl b/lib/compiler/src/beam_except.erl
index 9801c68ee2..abd39c661d 100644
--- a/lib/compiler/src/beam_except.erl
+++ b/lib/compiler/src/beam_except.erl
@@ -45,8 +45,7 @@ function({function,Name,Arity,CLabel,Is0}) ->
 	Is = function_1(Is0),
 	{function,Name,Arity,CLabel,Is}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
diff --git a/lib/compiler/src/beam_flatten.erl b/lib/compiler/src/beam_flatten.erl
index a4d45a4ca6..c60211f516 100644
--- a/lib/compiler/src/beam_flatten.erl
+++ b/lib/compiler/src/beam_flatten.erl
@@ -50,6 +50,9 @@ norm_block([{set,[],[],{alloc,R,Alloc}}|Is], Acc0) ->
 	Acc ->
 	    norm_block(Is, Acc)
     end;
+norm_block([{set,[D1],[S],get_hd},{set,[D2],[S],get_tl}|Is], Acc) ->
+    I = {get_list,S,D1,D2},
+    norm_block(Is, [I|Acc]);
 norm_block([I|Is], Acc) -> norm_block(Is, [norm(I)|Acc]);
 norm_block([], Acc) -> Acc.
     
@@ -64,12 +67,14 @@ norm({set,[D],[],{put_tuple,A}})  -> {put_tuple,A,D};
 norm({set,[],[S],put})            -> {put,S};
 norm({set,[D],[S],{get_tuple_element,I}}) -> {get_tuple_element,S,I,D};
 norm({set,[],[S,D],{set_tuple_element,I}}) -> {set_tuple_element,S,D,I};
-norm({set,[D1,D2],[S],get_list})          -> {get_list,S,D1,D2};
+norm({set,[D],[S],get_hd})        -> {get_hd,S,D};
+norm({set,[D],[S],get_tl})        -> {get_tl,S,D};
 norm({set,[D],[S|Puts],{alloc,R,{put_map,Op,F}}}) ->
     {put_map,F,Op,S,D,R,{list,Puts}};
 norm({set,[],[],remove_message})   -> remove_message;
 norm({set,[],[],fclearerror}) -> fclearerror;
-norm({set,[],[],fcheckerror}) -> {fcheckerror,{f,0}}.
+norm({set,[],[],fcheckerror}) -> {fcheckerror,{f,0}};
+norm({set,[],[],{line,_}=Line}) -> Line.
 
 norm_allocate({_Zero,nostack,Nh,[]}, Regs) ->
     [{test_heap,Nh,Regs}];
diff --git a/lib/compiler/src/beam_jump.erl b/lib/compiler/src/beam_jump.erl
index 0bcec9ce19..c33de217bd 100644
--- a/lib/compiler/src/beam_jump.erl
+++ b/lib/compiler/src/beam_jump.erl
@@ -336,17 +336,6 @@ opt([{test,_,{f,L}=Lbl,_}=I|[{label,L}|_]=Is], Acc0, St0) ->
             {Acc,St} = opt_useless_loads(Acc0, L, St0),
 	    opt(Is, Acc, St)
     end;
-opt([{test,_,{f,L}=Lbl,_}=I|[{label,L}|_]=Is], Acc0, St0) ->
-    %% Similar to the above, except we have a fall-through rather than jump
-    %%    Test Label Ops
-    %%    label Label
-    case beam_utils:is_pure_test(I) of
-	false ->
-	    opt(Is, [I|Acc0], label_used(Lbl, St0));
-	true ->
-            {Acc,St} = opt_useless_loads(Acc0, L, St0),
-	    opt(Is, Acc, St)
-    end;
 opt([{test,Test0,{f,L}=Lbl,Ops}=I|[{jump,To}|Is]=Is0], Acc, St) ->
     case is_label_defined(Is, L) of
 	false ->
diff --git a/lib/compiler/src/beam_listing.erl b/lib/compiler/src/beam_listing.erl
index 94b47cf568..73c6501fe5 100644
--- a/lib/compiler/src/beam_listing.erl
+++ b/lib/compiler/src/beam_listing.erl
@@ -23,14 +23,13 @@
 
 -include("core_parse.hrl").
 -include("v3_kernel.hrl").
--include("v3_life.hrl").
+-include("beam_disasm.hrl").
 
 -import(lists, [foreach/2]).
 
 -type code() :: cerl:c_module()
               | beam_utils:module_code()
               | #k_mdef{}
-              | {module(),_,_,_}                %v3_life
               | [_].                            %form-based format
 
 -spec module(file:io_device(), code()) -> 'ok'.
@@ -42,13 +41,9 @@ module(File, #k_mdef{}=Kern) ->
     %% This is a kernel module.
     io:put_chars(File, v3_kernel_pp:format(Kern));
     %%io:put_chars(File, io_lib:format("~p~n", [Kern]));
-module(File, {Mod,Exp,Attr,Kern}) ->
-    %% This is output from beam_life (v3).
-    io:fwrite(File, "~w.~n~p.~n~p.~n", [Mod,Exp,Attr]),
-    foreach(fun (F) -> function(File, F) end, Kern);
 module(Stream, {Mod,Exp,Attr,Code,NumLabels}) ->
-    %% This is output from beam_codegen.
-    io:format(Stream, "{module, ~p}.  %% version = ~w\n", 
+    %% This is output from v3_codegen.
+    io:format(Stream, "{module, ~p}.  %% version = ~w\n",
 	      [Mod, beam_opcodes:format_number()]),
     io:format(Stream, "\n{exports, ~p}.\n", [Exp]),
     io:format(Stream, "\n{attributes, ~p}.\n", [Attr]),
@@ -68,60 +63,3 @@ format_asm([{label,L}|Is]) ->
 format_asm([I|Is]) ->
     [io_lib:format("    ~p", [I]),".\n"|format_asm(Is)];
 format_asm([]) -> [].
-
-function(File, {function,Name,Arity,Args,Body,Vdb,_Anno}) ->
-    io:nl(File),
-    io:format(File, "function ~p/~p.\n", [Name,Arity]),
-    io:format(File, " ~p.\n", [Args]),
-    print_vdb(File, Vdb),
-    put(beam_listing_nl, false),
-    nl(File),
-    foreach(fun(F) -> format(File, F, []) end, Body),
-    nl(File),
-    erase(beam_listing_nl).
-
-format(File, #l{ke=Ke,i=I,vdb=Vdb}, Ind) ->
-    nl(File),
-    ind_format(File, Ind, "~p ", [I]),
-    print_vdb(File, Vdb),
-    nl(File),
-    format(File, Ke, Ind);
-format(File, Tuple, Ind) when is_tuple(Tuple) ->
-    ind_format(File, Ind, "{", []),
-    format_list(File, tuple_to_list(Tuple), [$\s|Ind]),
-    ind_format(File, Ind, "}", []);
-format(File, List, Ind) when is_list(List) ->
-    ind_format(File, Ind, "[", []),
-    format_list(File, List, [$\s|Ind]),
-    ind_format(File, Ind, "]", []);
-format(File, F, Ind) ->
-    ind_format(File, Ind, "~p", [F]).
-
-format_list(File, [F], Ind) ->
-    format(File, F, Ind);
-format_list(File, [F|Fs], Ind) ->
-    format(File, F, Ind),
-    ind_format(File, Ind, ",", []),
-    format_list(File, Fs, Ind);
-format_list(_, [], _) -> ok.
-
-
-print_vdb(File, [{Var,F,E}|Vs]) ->
-    io:format(File, "~p:~p..~p ", [Var,F,E]),
-    print_vdb(File, Vs);
-print_vdb(_, []) -> ok.
-
-ind_format(File, Ind, Format, Args) ->
-    case get(beam_listing_nl) of
-	true ->
-	    put(beam_listing_nl, false),
-	    io:put_chars(File, Ind);
-	false -> ok
-    end,
-    io:format(File, Format, Args).
-    
-nl(File) ->
-    case put(beam_listing_nl, true) of
-	true -> ok;
-	false -> io:nl(File)
-    end.
diff --git a/lib/compiler/src/beam_peep.erl b/lib/compiler/src/beam_peep.erl
index 9436c20b36..eb3192fe8f 100644
--- a/lib/compiler/src/beam_peep.erl
+++ b/lib/compiler/src/beam_peep.erl
@@ -41,8 +41,7 @@ function({function,Name,Arity,CLabel,Is0}) ->
 	Is = beam_jump:remove_unused_labels(Is1),
 	{function,Name,Arity,CLabel,Is}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
diff --git a/lib/compiler/src/beam_receive.erl b/lib/compiler/src/beam_receive.erl
index 468460eedf..3c8efa577c 100644
--- a/lib/compiler/src/beam_receive.erl
+++ b/lib/compiler/src/beam_receive.erl
@@ -82,8 +82,7 @@ function({function,Name,Arity,Entry,Is}) ->
 	D = beam_utils:index_labels(Is),
 	{function,Name,Arity,Entry,opt(Is, D, [])}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
diff --git a/lib/compiler/src/beam_record.erl b/lib/compiler/src/beam_record.erl
index 419089b1bc..58a6de6775 100644
--- a/lib/compiler/src/beam_record.erl
+++ b/lib/compiler/src/beam_record.erl
@@ -15,19 +15,12 @@
 %%
 %% %CopyrightEnd%
 %%
-%% File:    beam_record.erl
-%% Author:  Björn-Egil Dahlberg
-%% Created: 2014-09-03
-%%
-
--module(beam_record).
--export([module/2]).
 
 %% Rewrite the instruction stream on tagged tuple tests.
-%% Tagged tuples means a tuple of any arity with an atom as its first element.
-%% Typically records, ok-tuples and error-tuples.
-%% 
-%% from:
+%% Tagged tuples means a tuple of any arity with an atom as its
+%% first element, such as records and error tuples.
+%%
+%% From:
 %%     ...
 %%     {test,is_tuple,Fail,[Src]}.
 %%     {test,test_arity,Fail,[Src,Sz]}.
@@ -36,13 +29,16 @@
 %%     ...
 %%     {test,is_eq_exact,Fail,[Dst,Atom]}.
 %%     ...
-%% to:
+%% To:
 %%     ...
 %%     {test,is_tagged_tuple,Fail,[Src,Sz,Atom]}.
 %%     ...
+%%
 
+-module(beam_record).
+-export([module/2]).
 
--import(lists, [reverse/1]).
+-import(lists, [reverse/1,reverse/2]).
 
 -spec module(beam_utils:module_code(), [compile:option()]) ->
                     {'ok',beam_utils:module_code()}.
@@ -51,56 +47,85 @@ module({Mod,Exp,Attr,Fs0,Lc}, _Opt) ->
     Fs = [function(F) || F <- Fs0],
     {ok,{Mod,Exp,Attr,Fs,Lc}}.
 
-function({function,Name,Arity,CLabel,Is}) ->
+function({function,Name,Arity,CLabel,Is0}) ->
     try
-        Idx = beam_utils:index_labels(Is),
-        {function,Name,Arity,CLabel,rewrite(Is,Idx)}
+        Is1 = beam_utils:anno_defs(Is0),
+        Idx = beam_utils:index_labels(Is1),
+        Is = rewrite(reverse(Is1), Idx),
+        {function,Name,Arity,CLabel,Is}
     catch
-        Class:Error ->
-            Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
             io:fwrite("Function: ~w/~w\n", [Name,Arity]),
             erlang:raise(Class, Error, Stack)
     end.
 
-rewrite(Is,Idx) ->
-    rewrite(Is,Idx,[]).
+rewrite(Is, Idx) ->
+    rewrite(Is, Idx, 0, []).
 
-rewrite([{test,is_tuple,Fail,[Src]}=I1,
-         {test,test_arity,Fail,[Src,N]}=I2|Is],Idx,Acc) ->
-    case is_tagged_tuple(Is,Fail,Src,Idx) of
+rewrite([{test,test_arity,Fail,[Src,N]}=TA,
+         {test,is_tuple,Fail,[Src]}=TT|Is], Idx, Def, Acc0) ->
+    case is_tagged_tuple(Acc0, Def, Fail, Src, Idx) of
         no ->
-            rewrite(Is,Idx,[I2,I1|Acc]);
-        {Atom,[{block,[]}|Is1]} ->
-            rewrite(Is1,Idx,[{test,is_tagged_tuple,Fail,[Src,N,Atom]}|Acc]);
-        {Atom,Is1} ->
-            rewrite(Is1,Idx,[{test,is_tagged_tuple,Fail,[Src,N,Atom]}|Acc])
+            rewrite(Is, Idx, 0, [TT,TA|Acc0]);
+        {yes,Atom,Acc} ->
+            I = {test,is_tagged_tuple,Fail,[Src,N,Atom]},
+            rewrite(Is, Idx, Def, [I|Acc])
     end;
-rewrite([I|Is],Idx,Acc) ->
-    rewrite(Is,Idx,[I|Acc]);
-rewrite([],_,Acc) -> reverse(Acc).
-
-is_tagged_tuple([{block,[{set,[Dst],[Src],{get_tuple_element,0}}=B|Bs]},
-                 {test,is_eq_exact,Fail,[Dst,{atom,_}=Atom]}|Is],Fail,Src,Idx) ->
+rewrite([{block,[{'%anno',{def,Def}}|Bl]}|Is], Idx, _Def, Acc) ->
+    rewrite(Is, Idx, Def, [{block,Bl}|Acc]);
+rewrite([{label,L}=I|Is], Idx0, Def, Acc) ->
+    Idx = beam_utils:index_label(L, Acc, Idx0),
+    rewrite(Is, Idx, Def, [I|Acc]);
+rewrite([I|Is], Idx, Def, Acc) ->
+    rewrite(Is, Idx, Def, [I|Acc]);
+rewrite([], _, _, Acc) -> Acc.
 
-    %% if Dst is killed in the instruction stream and at fail label,
-    %% we can safely remove get_tuple_element.
-    %%
-    %% if Dst is not killed in the stream, we cannot remove get_tuple_element
-    %% since it is referenced.
-
-    case is_killed(Dst,Is,Fail,Idx) of
-        true  -> {Atom,[{block,Bs}|Is]};
-        false -> {Atom,[{block,[B|Bs]}|Is]}
+is_tagged_tuple([{block,Bl},
+                 {test,is_eq_exact,Fail,[Dst,{atom,_}=Atom]}|Is],
+                Def, Fail, Src, Idx) ->
+    case is_tagged_tuple_1(Bl, Is, Fail, Src, Dst, Idx, Def, []) of
+        no ->
+            no;
+        {yes,[]} ->
+            {yes,Atom,Is};
+        {yes,[_|_]=Block} ->
+            {yes,Atom,[{block,Block}|Is]}
     end;
-is_tagged_tuple([{block,[{set,_,_,_}=B|Bs]},
-                 {test,is_eq_exact,_,_}=I|Is],Fail,Src,Idx) ->
-    case is_tagged_tuple([{block,Bs},I|Is],Fail,Src,Idx) of
-        {Atom,[{block,Bsr}|Isr]} -> {Atom,[{block,[B|Bsr]}|Isr]};
-        no                       -> no
+is_tagged_tuple(_, _, _, _, _) ->
+    no.
+
+is_tagged_tuple_1([{set,[Dst],[Src],{get_tuple_element,0}}=I|Bl],
+                  Is, Fail, Src, Dst, Idx, Def, Acc) ->
+    %% Check usage of Dst to find out whether the get_tuple_element
+    %% is needed.
+    case usage(Dst, Is, Fail, Idx) of
+        killed ->
+            %% Safe to remove the get_tuple_element instruction.
+            {yes,reverse(Acc, Bl)};
+        used ->
+            %% Actively used. Must keep instruction.
+            {yes,reverse(Acc, [I|Bl])};
+        not_used ->
+            %% Not actually used (but must be initialized).
+            case is_defined(Dst, Def) of
+                false ->
+                    %% Dst must be initialized, but the
+                    %% actual value does not matter.
+                    Kill = {set,[Dst],[nil],move},
+                    {yes,reverse(Acc, [Kill|Bl])};
+                true ->
+                    %% The register is previously initialized.
+                    %% We can remove the instruction.
+                    {yes,reverse(Acc, Bl)}
+            end
     end;
-is_tagged_tuple(_Is,_Fail,_Src,_Idx) ->
+is_tagged_tuple_1([I|Bl], Is, Fail, Src, Dst, Idx, Def, Acc) ->
+    is_tagged_tuple_1(Bl, Is, Fail, Src, Dst, Idx, Def, [I|Acc]);
+is_tagged_tuple_1(_, _, _, _, _, _, _, _) ->
     no.
 
-is_killed(Dst,Is,{_,Lbl},Idx) ->
-    beam_utils:is_killed(Dst,Is,Idx) andalso
-        beam_utils:is_killed_at(Dst,Lbl,Idx).
+usage(Dst, Is, Fail, Idx) ->
+    beam_utils:usage(Dst, [{test,is_number,Fail,[nil]}|Is], Idx).
+
+is_defined({x,X}, Def) ->
+    (Def bsr X) band 1 =:= 1.
diff --git a/lib/compiler/src/beam_reorder.erl b/lib/compiler/src/beam_reorder.erl
index 910b7f6b0a..63bb57a1ac 100644
--- a/lib/compiler/src/beam_reorder.erl
+++ b/lib/compiler/src/beam_reorder.erl
@@ -35,8 +35,7 @@ function({function,Name,Arity,CLabel,Is0}) ->
 	Is = reorder(Is0),
 	{function,Name,Arity,CLabel,Is}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
diff --git a/lib/compiler/src/beam_split.erl b/lib/compiler/src/beam_split.erl
index d041f18806..52dd89b5bb 100644
--- a/lib/compiler/src/beam_split.erl
+++ b/lib/compiler/src/beam_split.erl
@@ -50,8 +50,9 @@ split_block([{set,[R],[_,_,_]=As,{bif,is_record,{f,Lbl}}}|Is], Bl, Acc) ->
     split_block(Is, [], [{bif,is_record,{f,Lbl},As,R}|make_block(Bl, Acc)]);
 split_block([{set,[R],As,{bif,N,{f,Lbl}=Fail}}|Is], Bl, Acc) when Lbl =/= 0 ->
     split_block(Is, [], [{bif,N,Fail,As,R}|make_block(Bl, Acc)]);
-split_block([{set,[R],As,{bif,raise,{f,_}=Fail}}|Is], Bl, Acc) ->
-    split_block(Is, [], [{bif,raise,Fail,As,R}|make_block(Bl, Acc)]);
+split_block([{set,[],[],{line,_}=Line},
+             {set,[R],As,{bif,raise,{f,_}=Fail}}|Is], Bl, Acc) ->
+    split_block(Is, [], [{bif,raise,Fail,As,R},Line|make_block(Bl, Acc)]);
 split_block([{set,[R],As,{alloc,Live,{gc_bif,N,{f,Lbl}=Fail}}}|Is], Bl, Acc)
   when Lbl =/= 0 ->
     split_block(Is, [], [{gc_bif,N,Fail,Live,As,R}|make_block(Bl, Acc)]);
@@ -61,8 +62,6 @@ split_block([{set,[D],[S|Puts],{alloc,R,{put_map,Op,{f,Lbl}=Fail}}}|Is],
 			 make_block(Bl, Acc)]);
 split_block([{set,[R],[],{try_catch,Op,L}}|Is], Bl, Acc) ->
     split_block(Is, [], [{Op,R,L}|make_block(Bl, Acc)]);
-split_block([{set,[],[],{line,_}=Line}|Is], Bl, Acc) ->
-    split_block(Is, [], [Line|make_block(Bl, Acc)]);
 split_block([I|Is], Bl, Acc) ->
     split_block(Is, [I|Bl], Acc);
 split_block([], Bl, Acc) -> make_block(Bl, Acc).
diff --git a/lib/compiler/src/beam_type.erl b/lib/compiler/src/beam_type.erl
index 3d842a6fd3..28f36db399 100644
--- a/lib/compiler/src/beam_type.erl
+++ b/lib/compiler/src/beam_type.erl
@@ -17,14 +17,15 @@
 %%
 %% %CopyrightEnd%
 %%
-%% Purpose : Type-based optimisations.
+%% Purpose: Type-based optimisations. See the comment for verified_type/1
+%% the very end of this file for a description of the types in the
+%% type database.
 
 -module(beam_type).
 
 -export([module/2]).
 
--import(lists, [filter/2,foldl/3,keyfind/3,member/2,
-		reverse/1,reverse/2,sort/1]).
+-import(lists, [foldl/3,member/2,reverse/1,reverse/2,sort/1]).
 
 -define(UNICODE_INT, {integer,{0,16#10FFFF}}).
 
@@ -40,11 +41,10 @@ function({function,Name,Arity,CLabel,Asm0}) ->
 	Asm1 = beam_utils:live_opt(Asm0),
 	Asm2 = opt(Asm1, [], tdb_new()),
 	Asm3 = beam_utils:live_opt(Asm2),
-	Asm = beam_utils:delete_live_annos(Asm3),
+	Asm = beam_utils:delete_annos(Asm3),
 	{function,Name,Arity,CLabel,Asm}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -81,96 +81,81 @@ simplify(Is0, TypeDb0) ->
 %%  Basic simplification, mostly tuples, no floating point optimizations.
 
 simplify_basic(Is, Ts) ->
-    simplify_basic_1(Is, Ts, []).
-    
-simplify_basic_1([{set,[D],[{integer,Index},Reg],{bif,element,_}}=I0|Is], Ts0, Acc) ->
-    I = case max_tuple_size(Reg, Ts0) of
-	    Sz when 0 < Index, Index =< Sz ->
-		{set,[D],[Reg],{get_tuple_element,Index-1}};
-	    _Other -> I0
-    end,
-    Ts = update(I, Ts0),
-    simplify_basic_1(Is, Ts, [I|Acc]);
-simplify_basic_1([{set,[D],[TupleReg],{get_tuple_element,0}}=I|Is0], Ts0, Acc) ->
-    case tdb_find(TupleReg, Ts0) of
-	{tuple,_,[Contents]} ->
-	    simplify_basic_1([{set,[D],[Contents],move}|Is0], Ts0, Acc);
-	_ ->
-	    Ts = update(I, Ts0),
-	    simplify_basic_1(Is0, Ts, [I|Acc])
+    simplify_basic(Is, Ts, []).
+
+simplify_basic([I0|Is], Ts0, Acc) ->
+    case simplify_instr(I0, Ts0) of
+        [] ->
+            simplify_basic(Is, Ts0, Acc);
+        [I] ->
+            Ts = update(I, Ts0),
+            simplify_basic(Is, Ts, [I|Acc])
+    end;
+simplify_basic([], Ts, Acc) ->
+    {reverse(Acc),Ts}.
+
+%% simplify_instr(Instruction, Ts) -> [Instruction].
+
+%%  Simplify a simple instruction using type information. Return an
+%%  empty list if the instruction should be removed, or a list with
+%%  the original or modified instruction.
+
+simplify_instr({set,[D],[{integer,Index},Reg],{bif,element,_}}=I, Ts) ->
+    case max_tuple_size(Reg, Ts) of
+        Sz when 0 < Index, Index =< Sz ->
+            [{set,[D],[Reg],{get_tuple_element,Index-1}}];
+        _ -> [I]
     end;
-simplify_basic_1([{set,_,_,{try_catch,_,_}}=I|Is], _Ts, Acc) ->
-    simplify_basic_1(Is, tdb_new(), [I|Acc]);
-simplify_basic_1([{test,is_atom,_,[R]}=I|Is], Ts, Acc) ->
+simplify_instr({test,Test,Fail,[R]}=I, Ts) ->
     case tdb_find(R, Ts) of
-	boolean -> simplify_basic_1(Is, Ts, Acc);
-	_ -> simplify_basic_1(Is, Ts, [I|Acc])
+        any ->
+            [I];
+        Type ->
+            case will_succeed(Test, Type) of
+                yes -> [];
+                no -> [{jump,Fail}];
+                maybe -> [I]
+            end
+    end;
+simplify_instr({set,[D],[TupleReg],{get_tuple_element,0}}=I, Ts) ->
+    case tdb_find(TupleReg, Ts) of
+        {tuple,_,_,[Contents]} ->
+            [{set,[D],[Contents],move}];
+        _ ->
+            [I]
     end;
-simplify_basic_1([{test,is_integer,_,[R]}=I|Is], Ts, Acc) ->
+simplify_instr({test,test_arity,_,[R,Arity]}=I, Ts) ->
     case tdb_find(R, Ts) of
-	integer -> simplify_basic_1(Is, Ts, Acc);
-	{integer,_} -> simplify_basic_1(Is, Ts, Acc);
-	_ -> simplify_basic_1(Is, Ts, [I|Acc])
+        {tuple,exact_size,Arity,_} -> [];
+        _ -> [I]
     end;
-simplify_basic_1([{test,is_tuple,_,[R]}=I|Is], Ts, Acc) ->
+simplify_instr({test,is_eq_exact,Fail,[R,{atom,A}=Atom]}=I, Ts) ->
     case tdb_find(R, Ts) of
-	{tuple,_,_} -> simplify_basic_1(Is, Ts, Acc);
-	_ -> simplify_basic_1(Is, Ts, [I|Acc])
+        {atom,_}=Atom -> [];
+        boolean when is_boolean(A) -> [I];
+        any -> [I];
+        _ -> [{jump,Fail}]
     end;
-simplify_basic_1([{test,test_arity,_,[R,Arity]}=I|Is], Ts0, Acc) ->
-    case tdb_find(R, Ts0) of
-	{tuple,Arity,_} ->
-	    simplify_basic_1(Is, Ts0, Acc);
-	_Other ->
-	    Ts = update(I, Ts0),
-	    simplify_basic_1(Is, Ts, [I|Acc])
+simplify_instr({test,is_record,_,[R,{atom,_}=Tag,{integer,Arity}]}=I, Ts) ->
+    case tdb_find(R, Ts) of
+        {tuple,exact_size,Arity,[Tag]} -> [];
+        _ -> [I]
     end;
-simplify_basic_1([{test,is_map,_,[R]}=I|Is], Ts0, Acc) ->
-    case tdb_find(R, Ts0) of
-	map -> simplify_basic_1(Is, Ts0, Acc);
-	_Other ->
-	    Ts = update(I, Ts0),
-	    simplify_basic_1(Is, Ts, [I|Acc])
+simplify_instr({select,select_val,Reg,_,_}=I, Ts) ->
+    [case tdb_find(Reg, Ts) of
+         {integer,Range} ->
+             simplify_select_val_int(I, Range);
+         boolean ->
+             simplify_select_val_bool(I);
+         _ ->
+             I
+     end];
+simplify_instr({test,bs_test_unit,_,[Src,Unit]}=I, Ts) ->
+    case tdb_find(Src, Ts) of
+        {binary,U} when U rem Unit =:= 0 -> [];
+        _ -> [I]
     end;
-simplify_basic_1([{test,is_nonempty_list,_,[R]}=I|Is], Ts0, Acc) ->
-    case tdb_find(R, Ts0) of
-	nonempty_list -> simplify_basic_1(Is, Ts0, Acc);
-	_Other ->
-	    Ts = update(I, Ts0),
-	    simplify_basic_1(Is, Ts, [I|Acc])
-    end;
-simplify_basic_1([{test,is_eq_exact,Fail,[R,{atom,_}=Atom]}=I|Is0], Ts0, Acc0) ->
-    Acc = case tdb_find(R, Ts0) of
-	      {atom,_}=Atom -> Acc0;
-	      {atom,_} -> [{jump,Fail}|Acc0];
-	      _ -> [I|Acc0]
-	  end,
-    Ts = update(I, Ts0),
-    simplify_basic_1(Is0, Ts, Acc);
-simplify_basic_1([{test,is_record,_,[R,{atom,_}=Tag,{integer,Arity}]}=I|Is], Ts0, Acc) ->
-    case tdb_find(R, Ts0) of
-	{tuple,Arity,[Tag]} ->
-	    simplify_basic_1(Is, Ts0, Acc);
-	_Other ->
-	    Ts = update(I, Ts0),
-	    simplify_basic_1(Is, Ts, [I|Acc])
-    end;
-simplify_basic_1([{select,select_val,Reg,_,_}=I0|Is], Ts, Acc) ->
-    I = case tdb_find(Reg, Ts) of
-	    {integer,Range} ->
-		simplify_select_val_int(I0, Range);
-	    boolean ->
-		simplify_select_val_bool(I0);
-	    _ ->
-		I0
-	end,
-    simplify_basic_1(Is, tdb_new(), [I|Acc]);
-simplify_basic_1([I|Is], Ts0, Acc) ->
-    Ts = update(I, Ts0),
-    simplify_basic_1(Is, Ts, [I|Acc]);
-simplify_basic_1([], Ts, Acc) ->
-    Is = reverse(Acc),
-    {Is,Ts}.
+simplify_instr(I, _) -> [I].
 
 simplify_select_val_int({select,select_val,R,_,L0}=I, {Min,Max}) ->
     Vs = sort([V || {integer,V} <- L0]),
@@ -198,6 +183,53 @@ eq_ranges([H], H, H) -> true;
 eq_ranges([H|T], H, Max) -> eq_ranges(T, H+1, Max);
 eq_ranges(_, _, _) -> false.
 
+%% will_succeed(TestOperation, Type) -> yes|no|maybe.
+%%  Test whether TestOperation applied to an argument of type Type
+%%  will succeed.  Return yes, no, or maybe.
+%%
+%%  Type is a type as described in the comment for verified_type/1 at
+%%  the very end of this file, but it will *never* be 'any'.
+
+will_succeed(is_atom, Type) ->
+    case Type of
+        {atom,_} -> yes;
+        boolean -> yes;
+        _ -> no
+    end;
+will_succeed(is_binary, Type) ->
+    case Type of
+        {binary,U} when U rem 8 =:= 0 -> yes;
+        {binary,_} -> maybe;
+        _ -> no
+    end;
+will_succeed(is_bitstr, Type) ->
+    case Type of
+        {binary,_} -> yes;
+        _ -> no
+    end;
+will_succeed(is_integer, Type) ->
+    case Type of
+        integer -> yes;
+        {integer,_} -> yes;
+        _ -> no
+    end;
+will_succeed(is_map, Type) ->
+    case Type of
+        map -> yes;
+        _ -> no
+    end;
+will_succeed(is_nonempty_list, Type) ->
+    case Type of
+        nonempty_list -> yes;
+        _ -> no
+    end;
+will_succeed(is_tuple, Type) ->
+    case Type of
+        {tuple,_,_,_} -> yes;
+        _ -> no
+    end;
+will_succeed(_, _) -> maybe.
+
 %% simplify_float([Instruction], TypeDatabase) ->
 %%                 {[Instruction],TypeDatabase'} | not_possible
 %%  Simplify floating point operations in blocks.
@@ -227,7 +259,7 @@ simplify_float_1([{set,[D0],[A0],{alloc,_,{gc_bif,'-',{f,0}}}}=I|Is]=Is0,
 	    {D,Rs} = find_dest(D0, Rs1),
 	    Areg = fetch_reg(A, Rs),
 	    Acc = [{set,[D],[Areg],{bif,fnegate,{f,0}}}|clearerror(Acc1)],
-	    Ts = tdb_update([{D0,float}], Ts0),
+	    Ts = tdb_store(D0, float, Ts0),
 	    simplify_float_1(Is, Ts, Rs, Acc);
 	_Other ->
 	    Ts = update(I, Ts0),
@@ -250,7 +282,7 @@ simplify_float_1([{set,[D0],[A0,B0],{alloc,_,{gc_bif,Op0,{f,0}}}}=I|Is]=Is0,
 	    Areg = fetch_reg(A, Rs),
 	    Breg = fetch_reg(B, Rs),
 	    Acc = [{set,[D],[Areg,Breg],{bif,Op,{f,0}}}|clearerror(Acc2)],
-	    Ts = tdb_update([{D0,float}], Ts0),
+	    Ts = tdb_store(D0, float, Ts0),
 	    simplify_float_1(Is, Ts, Rs, Acc)
     end;
 simplify_float_1([{set,_,_,{try_catch,_,_}}=I|Is]=Is0, _Ts, Rs0, Acc0) ->
@@ -301,7 +333,7 @@ clearerror([], OrigIs) -> [{set,[],[],fclearerror}|OrigIs].
 %%  Combine two blocks and eliminate any move instructions that assign
 %%  to registers that are killed later in the block.
 %%
-merge_blocks(B1, [{'%live',_,_}|B2]) ->
+merge_blocks(B1, [{'%anno',_}|B2]) ->
     merge_blocks_1(B1++[{set,[],[],stop_here}|B2]).
 
 merge_blocks_1([{set,[],_,stop_here}|Is]) -> Is;
@@ -350,27 +382,17 @@ flt_need_heap_2({set,_,_,{put_tuple,_}}, H, Fl) ->
     {[],H+1,Fl};
 flt_need_heap_2({set,_,_,put}, H, Fl) ->
     {[],H+1,Fl};
-%% Then the "neutral" instructions. We just pass them.
-flt_need_heap_2({set,[{fr,_}],_,_}, H, Fl) ->
-    {[],H,Fl};
-flt_need_heap_2({set,[],[],fclearerror}, H, Fl) ->
-    {[],H,Fl};
-flt_need_heap_2({set,[],[],fcheckerror}, H, Fl) ->
-    {[],H,Fl};
-flt_need_heap_2({set,_,_,{bif,_,_}}, H, Fl) ->
-    {[],H,Fl};
-flt_need_heap_2({set,_,_,move}, H, Fl) ->
-    {[],H,Fl};
-flt_need_heap_2({set,_,_,{get_tuple_element,_}}, H, Fl) ->
-    {[],H,Fl};
-flt_need_heap_2({set,_,_,get_list}, H, Fl) ->
-    {[],H,Fl};
-flt_need_heap_2({set,_,_,{try_catch,_,_}}, H, Fl) ->
-    {[],H,Fl};
-%% All other instructions should cause the insertion of an allocation
+%% The following instructions cause the insertion of an allocation
 %% instruction if needed.
+flt_need_heap_2({set,_,_,{alloc,_,_}}, H, Fl) ->
+    {flt_alloc(H, Fl),0,0};
+flt_need_heap_2({set,_,_,{set_tuple_element,_}}, H, Fl) ->
+    {flt_alloc(H, Fl),0,0};
+flt_need_heap_2({'%anno',_}, H, Fl) ->
+    {flt_alloc(H, Fl),0,0};
+%% All other instructions are "neutral". We just pass them.
 flt_need_heap_2(_, H, Fl) ->
-    {flt_alloc(H, Fl),0,0}.
+    {[],H,Fl}.
 
 flt_alloc(0, 0) ->
     [];
@@ -393,7 +415,7 @@ build_alloc(Words, Floats) -> {alloc,[{words,Words},{floats,Floats}]}.
 %%  is not continous at an allocation function (e.g. if {x,0} and {x,2}
 %%  are live, but not {x,1}).
 
-flt_liveness([{'%live',_Live,Regs}=LiveInstr|Is]) ->
+flt_liveness([{'%anno',{used,Regs}}=LiveInstr|Is]) ->
     flt_liveness_1(Is, Regs, [LiveInstr]).
 
 flt_liveness_1([{set,Ds,Ss,{alloc,Live0,Alloc}}|Is], Regs0, Acc) ->
@@ -405,7 +427,7 @@ flt_liveness_1([{set,Ds,Ss,{alloc,Live0,Alloc}}|Is], Regs0, Acc) ->
 flt_liveness_1([{set,Ds,_,_}=I|Is], Regs0, Acc) ->
     Regs = x_live(Ds, Regs0),
     flt_liveness_1(Is, Regs, [I|Acc]);
-flt_liveness_1([{'%live',_,_}], _Regs, Acc) ->
+flt_liveness_1([{'%anno',_}], _Regs, Acc) ->
     reverse(Acc).
 
 init_regs(Live) ->
@@ -429,103 +451,104 @@ x_live([], Regs) -> Regs.
 %%  Update the type database to account for executing an instruction.
 %%
 %%  First the cases for instructions inside basic blocks.
-update({'%live',_,_}, Ts) -> Ts;
+update({'%anno',_}, Ts) ->
+    Ts;
 update({set,[D],[S],move}, Ts) ->
     tdb_copy(S, D, Ts);
-update({set,[D],[{integer,I},Reg],{bif,element,_}}, Ts0) ->
-    tdb_update([{Reg,{tuple,I,[]}},{D,kill}], Ts0);
-update({set,[D],[_Index,Reg],{bif,element,_}}, Ts0) ->
-    tdb_update([{Reg,{tuple,0,[]}},{D,kill}], Ts0);
-update({set,[D],Args,{bif,N,_}}, Ts0) ->
+update({set,[D],[Index,Reg],{bif,element,_}}, Ts0) ->
+    MinSize = case Index of
+                  {integer,I} -> I;
+                  _ -> 0
+              end,
+    Ts = tdb_meet(Reg, {tuple,min_size,MinSize,[]}, Ts0),
+    tdb_store(D, any, Ts);
+update({set,[D],Args,{bif,N,_}}, Ts) ->
     Ar = length(Args),
     BoolOp = erl_internal:new_type_test(N, Ar) orelse
 	erl_internal:comp_op(N, Ar) orelse
 	erl_internal:bool_op(N, Ar),
-    case BoolOp of
-	true ->
-	    tdb_update([{D,boolean}], Ts0);
-	false ->
-	    tdb_update([{D,kill}], Ts0)
+    Type = case BoolOp of
+               true -> boolean;
+               false -> unary_op_type(N)
+           end,
+    tdb_store(D, Type, Ts);
+update({set,[D],[S],{get_tuple_element,0}}, Ts0) ->
+    if
+        D =:= S ->
+            tdb_store(D, any, Ts0);
+        true ->
+            Ts = tdb_store(D, {tuple_element,S,0}, Ts0),
+            tdb_store(S, {tuple,min_size,1,[]}, Ts)
     end;
-update({set,[D],[S],{get_tuple_element,0}}, Ts) ->
-    tdb_update([{D,{tuple_element,S,0}}], Ts);
 update({set,[D],[S],{alloc,_,{gc_bif,float,{f,0}}}}, Ts0) ->
     %% Make sure we reject non-numeric literal argument.
     case possibly_numeric(S) of
-	true ->  tdb_update([{D,float}], Ts0);
-	false -> Ts0
+        true ->  tdb_store(D, float, Ts0);
+        false -> Ts0
     end;
 update({set,[D],[S1,S2],{alloc,_,{gc_bif,'band',{f,0}}}}, Ts) ->
-    case keyfind(integer, 1, [S1,S2]) of
-	{integer,N} ->
-	    update_band(N, D, Ts);
-	false ->
-	    tdb_update([{D,integer}], Ts)
-    end;
-update({set,[D],[S1,S2],{alloc,_,{gc_bif,'/',{f,0}}}}, Ts0) ->
+    Type = band_type(S1, S2, Ts),
+    tdb_store(D, Type, Ts);
+update({set,[D],[S1,S2],{alloc,_,{gc_bif,'/',{f,0}}}}, Ts) ->
     %% Make sure we reject non-numeric literals.
     case possibly_numeric(S1) andalso possibly_numeric(S2) of
-	true ->  tdb_update([{D,float}], Ts0);
-	false -> Ts0
+        true -> tdb_store(D, float, Ts);
+        false -> Ts
     end;
 update({set,[D],[S1,S2],{alloc,_,{gc_bif,Op,{f,0}}}}, Ts0) ->
     case op_type(Op) of
 	integer ->
-	    tdb_update([{D,integer}], Ts0);
-	{float,_} ->
-	    case {tdb_find(S1, Ts0),tdb_find(S2, Ts0)} of
-		{float,_} -> tdb_update([{D,float}], Ts0);
-		{_,float} -> tdb_update([{D,float}], Ts0);
-		{_,_} -> tdb_update([{D,kill}], Ts0)
-	    end;
-	unknown ->
-	    tdb_update([{D,kill}], Ts0)
-    end;
-update({set,[],_Src,_Op}, Ts0) -> Ts0;
-update({set,[D],_Src,_Op}, Ts0) ->
-    tdb_update([{D,kill}], Ts0);
-update({set,[D1,D2],_Src,_Op}, Ts0) ->
-    tdb_update([{D1,kill},{D2,kill}], Ts0);
+	    tdb_store(D, integer, Ts0);
+        {float,_} ->
+            case {tdb_find(S1, Ts0),tdb_find(S2, Ts0)} of
+                {float,_} -> tdb_store(D, float, Ts0);
+                {_,float} -> tdb_store(D, float, Ts0);
+                {_,_} -> tdb_store(D, any, Ts0)
+            end;
+        Type ->
+            tdb_store(D, Type, Ts0)
+    end;
+update({set,[D],[_],{alloc,_,{gc_bif,Op,{f,0}}}}, Ts) ->
+    tdb_store(D, unary_op_type(Op), Ts);
+update({set,[],_Src,_Op}, Ts) ->
+    Ts;
+update({set,[D],_Src,_Op}, Ts) ->
+    tdb_store(D, any, Ts);
 update({kill,D}, Ts) ->
-    tdb_update([{D,kill}], Ts);
+    tdb_store(D, any, Ts);
 
 %% Instructions outside of blocks.
-update({test,is_float,_Fail,[Src]}, Ts0) ->
-    tdb_update([{Src,float}], Ts0);
-update({test,test_arity,_Fail,[Src,Arity]}, Ts0) ->
-    tdb_update([{Src,{tuple,Arity,[]}}], Ts0);
-update({test,is_map,_Fail,[Src]}, Ts0) ->
-    tdb_update([{Src,map}], Ts0);
+update({test,test_arity,_Fail,[Src,Arity]}, Ts) ->
+    tdb_meet(Src, {tuple,exact_size,Arity,[]}, Ts);
 update({get_map_elements,_,Src,{list,Elems0}}, Ts0) ->
+    Ts1 = tdb_meet(Src, map, Ts0),
     {_Ss,Ds} = beam_utils:split_even(Elems0),
-    Elems = [{Dst,kill} || Dst <- Ds],
-    tdb_update([{Src,map}|Elems], Ts0);
-update({test,is_nonempty_list,_Fail,[Src]}, Ts0) ->
-    tdb_update([{Src,nonempty_list}], Ts0);
-update({test,is_eq_exact,_,[Reg,{atom,_}=Atom]}, Ts) ->
-    case tdb_find(Reg, Ts) of
-	error ->
-	    Ts;
-	{tuple_element,TupleReg,0} ->
-	    tdb_update([{TupleReg,{tuple,1,[Atom]}}], Ts);
-	_ ->
-	    Ts
-    end;
+    foldl(fun(Dst, A) -> tdb_store(Dst, any, A) end, Ts1, Ds);
+update({test,is_eq_exact,_,[Reg,{atom,_}=Atom]}, Ts0) ->
+    Ts = case tdb_find_source_tuple(Reg, Ts0) of
+             {source_tuple,TupleReg} ->
+                 tdb_meet(TupleReg, {tuple,min_size,1,[Atom]}, Ts0);
+             none ->
+                 Ts0
+         end,
+    tdb_meet(Reg, Atom, Ts);
 update({test,is_record,_Fail,[Src,Tag,{integer,Arity}]}, Ts) ->
-    tdb_update([{Src,{tuple,Arity,[Tag]}}], Ts);
+    tdb_meet(Src, {tuple,exact_size,Arity,[Tag]}, Ts);
 
-%% Binary matching
+%% Binaries and binary matching.
 
 update({test,bs_get_integer2,_,_,Args,Dst}, Ts) ->
-    tdb_update([{Dst,get_bs_integer_type(Args)}], Ts);
+    tdb_store(Dst, get_bs_integer_type(Args), Ts);
 update({test,bs_get_utf8,_,_,_,Dst}, Ts) ->
-    tdb_update([{Dst,?UNICODE_INT}], Ts);
+    tdb_store(Dst, ?UNICODE_INT, Ts);
 update({test,bs_get_utf16,_,_,_,Dst}, Ts) ->
-    tdb_update([{Dst,?UNICODE_INT}], Ts);
+    tdb_store(Dst, ?UNICODE_INT, Ts);
 update({test,bs_get_utf32,_,_,_,Dst}, Ts) ->
-    tdb_update([{Dst,?UNICODE_INT}], Ts);
+    tdb_store(Dst, ?UNICODE_INT, Ts);
+update({bs_init,_,{bs_init2,_,_},_,_,Dst}, Ts) ->
+    tdb_store(Dst, {binary,8}, Ts);
 update({bs_init,_,_,_,_,Dst}, Ts) ->
-    tdb_update([{Dst,kill}], Ts);
+    tdb_store(Dst, {binary,1}, Ts);
 update({bs_put,_,_,_}, Ts) ->
     Ts;
 update({bs_save2,_,_}, Ts) ->
@@ -533,14 +556,31 @@ update({bs_save2,_,_}, Ts) ->
 update({bs_restore2,_,_}, Ts) ->
     Ts;
 update({bs_context_to_binary,Dst}, Ts) ->
-    tdb_update([{Dst,kill}], Ts);
-update({test,bs_start_match2,_,_,_,Dst}, Ts) ->
-    tdb_update([{Dst,kill}], Ts);
-update({test,bs_get_binary2,_,_,_,Dst}, Ts) ->
-    tdb_update([{Dst,kill}], Ts);
+    tdb_store(Dst, {binary,1}, Ts);
+update({test,bs_start_match2,_,_,[Src,_],Dst}, Ts0) ->
+    Ts = tdb_meet(Src, {binary,1}, Ts0),
+    tdb_copy(Src, Dst, Ts);
+update({test,bs_get_binary2,_,_,[_,_,Unit,_],Dst}, Ts) ->
+    true = is_integer(Unit),                    %Assertion.
+    tdb_store(Dst, {binary,Unit}, Ts);
 update({test,bs_get_float2,_,_,_,Dst}, Ts) ->
-    tdb_update([{Dst,float}], Ts);
-
+    tdb_store(Dst, float, Ts);
+update({test,bs_test_unit,_,[Src,Unit]}, Ts) ->
+    tdb_meet(Src, {binary,Unit}, Ts);
+
+%% Other test instructions
+update({test,Test,_Fail,[Src]}, Ts) ->
+    Type = case Test of
+               is_binary -> {binary,8};
+               is_bitstr -> {binary,1};
+               is_boolean -> boolean;
+               is_float -> float;
+               is_integer -> integer;
+               is_map -> map;
+               is_nonempty_list -> nonempty_list;
+               _ -> any
+           end,
+    tdb_meet(Src, Type, Ts);
 update({test,_Test,_Fail,_Other}, Ts) ->
     Ts;
 
@@ -548,13 +588,13 @@ update({test,_Test,_Fail,_Other}, Ts) ->
 
 update({call_ext,Ar,{extfunc,math,Math,Ar}}, Ts) ->
     case is_math_bif(Math, Ar) of
-	true -> tdb_update([{{x,0},float}], Ts);
+	true -> tdb_store({x,0}, float, Ts);
 	false -> tdb_kill_xregs(Ts)
     end;
 update({call_ext,3,{extfunc,erlang,setelement,3}}, Ts0) ->
     Ts = tdb_kill_xregs(Ts0),
     case tdb_find({x,1}, Ts0) of
-	{tuple,Sz,_}=T0 ->
+	{tuple,SzKind,Sz,_}=T0 ->
 	    T = case tdb_find({x,0}, Ts0) of
 		    {integer,{I,I}} when I > 1 ->
 			%% First element is not changed. The result
@@ -563,9 +603,9 @@ update({call_ext,3,{extfunc,erlang,setelement,3}}, Ts0) ->
 		    _ ->
 			%% Position is 1 or unknown. May change the
 			%% first element of the tuple.
-			{tuple,Sz,[]}
+			{tuple,SzKind,Sz,[]}
 		end,
-	    tdb_update([{{x,0},T}], Ts);
+            tdb_store({x,0}, T, Ts);
 	_ ->
 	    Ts
     end;
@@ -576,24 +616,32 @@ update({call_fun, _}, Ts) -> tdb_kill_xregs(Ts);
 update({apply, _}, Ts) -> tdb_kill_xregs(Ts);
 
 update({line,_}, Ts) -> Ts;
+update({'%',_}, Ts) -> Ts;
 
 %% The instruction is unknown.  Kill all information.
 update(_I, _Ts) -> tdb_new().
 
-update_band(N, Reg, Ts) ->
-    Type = update_band_1(N, 0),
-    tdb_update([{Reg,Type}], Ts).
+band_type({integer,Int}, Other, Ts) ->
+    band_type_1(Int, Other, Ts);
+band_type(Other, {integer,Int}, Ts) ->
+    band_type_1(Int, Other, Ts);
+band_type(_, _, _) -> integer.
 
-update_band_1(N, Bits) when Bits < 64 ->
+band_type_1(Int, OtherSrc, Ts) ->
+    Type = band_type_2(Int, 0),
+    OtherType = tdb_find(OtherSrc, Ts),
+    meet(Type, OtherType).
+
+band_type_2(N, Bits) when Bits < 64 ->
     case 1 bsl Bits of
 	P when P =:= N + 1 ->
 	    {integer,{0,N}};
 	P when P > N + 1 ->
 	    integer;
 	_ ->
-	    update_band_1(N, Bits+1)
+	    band_type_2(N, Bits+1)
     end;
-update_band_1(_, _) ->
+band_type_2(_, _) ->
     %% Negative or large positive number. Give up.
     integer.
 
@@ -647,7 +695,7 @@ possibly_numeric(_) -> false.
 
 max_tuple_size(Reg, Ts) ->
     case tdb_find(Reg, Ts) of
-	{tuple,Sz,_} -> Sz;
+	{tuple,_,Sz,_} -> Sz;
 	_Other -> 0
     end.
 
@@ -717,7 +765,15 @@ op_type('bxor') -> integer;
 op_type('bsl') -> integer;
 op_type('bsr') -> integer;
 op_type('div') -> integer;
-op_type(_) -> unknown.
+op_type(_) -> any.
+
+unary_op_type(bit_size) -> integer;
+unary_op_type(byte_size) -> integer;
+unary_op_type(length) -> integer;
+unary_op_type(map_size) -> integer;
+unary_op_type(size) -> integer;
+unary_op_type(tuple_size) -> integer;
+unary_op_type(_) -> any.
 
 flush(Rs, [{set,[_],[_,_,_],{bif,is_record,_}}|_]=Is0, Acc0) ->
     Acc = flush_all(Rs, Is0, Acc0),
@@ -800,37 +856,39 @@ checkerror_1([], OrigIs) -> OrigIs.
 checkerror_2(OrigIs) -> [{set,[],[],fcheckerror}|OrigIs].
 
 
-%%% Routines for maintaining a type database.  The type database 
+%%% Routines for maintaining a type database.  The type database
 %%% associates type information with registers.
 %%%
-%%% {tuple,Size,First} means that the corresponding register contains a
-%%% tuple with *at least* Size elements.  An tuple with unknown
-%%% size is represented as {tuple,0,[]}. First is either [] (meaning that
-%%% the tuple's first element is unknown) or [FirstElement] (the contents
-%%% of the first element).
-%%%
-%%% 'float' means that the register contains a float.
-%%%
-%%% 'integer' or {integer,{Min,Max}} that the register contains an
-%%% integer.
+%%% See the comment for verified_type/1 at the end of module for
+%%% a description of the possible types.
 
 %% tdb_new() -> EmptyDataBase
 %%  Creates a new, empty type database.
 
 tdb_new() -> [].
 
-%% tdb_find(Register, Db) -> Information|error
+%% tdb_find(Register, Db) -> Type
 %%  Returns type information or the atom error if there is no type
 %%  information available for Register.
+%%
+%%  See the comment for verified_type/1 at the end of module for
+%%  a description of the possible types.
 
-tdb_find({x,_}=K, Ts) -> tdb_find_1(K, Ts);
-tdb_find({y,_}=K, Ts) -> tdb_find_1(K, Ts);
-tdb_find(_, _) -> error.
+tdb_find(Reg, Ts) ->
+    case tdb_find_raw(Reg, Ts) of
+        {tuple_element,_,_} -> any;
+        Type -> Type
+    end.
 
-tdb_find_1(K, Ts) ->
-    case orddict:find(K, Ts) of
-	{ok,Val} -> Val;
-	error -> error
+%% tdb_find_source_tuple(Register, Ts) -> {source_tuple,Register} | 'none'.
+%%  Find the tuple whose first element was fetched to the register Register.
+
+tdb_find_source_tuple(Reg, Ts) ->
+    case tdb_find_raw(Reg, Ts) of
+        {tuple_element,Src,0} ->
+            {source_tuple,Src};
+        _ ->
+            none
     end.
 
 %% tdb_copy(Source, Dest, Db) -> Db'
@@ -838,9 +896,9 @@ tdb_find_1(K, Ts) ->
 %%  as the Source.
 
 tdb_copy({Tag,_}=S, D, Ts) when Tag =:= x; Tag =:= y ->
-    case tdb_find(S, Ts) of
-	error -> orddict:erase(D, Ts);
-	Type -> orddict:store(D, Type, Ts)
+    case tdb_find_raw(S, Ts) of
+        any -> orddict:erase(D, Ts);
+        Type -> orddict:store(D, Type, Ts)
     end;
 tdb_copy(Literal, D, Ts) ->
     Type = case Literal of
@@ -851,15 +909,90 @@ tdb_copy(Literal, D, Ts) ->
 	       {literal,#{}} -> map;
 	       {literal,Tuple} when tuple_size(Tuple) >= 1 ->
 		   Lit = tag_literal(element(1, Tuple)),
-		   {tuple,tuple_size(Tuple),[Lit]};
-	       _ -> term
+		   {tuple,exact_size,tuple_size(Tuple),[Lit]};
+	       _ -> any
 	   end,
-    if
-	Type =:= term ->
-	    orddict:erase(D, Ts);
-	true ->
-	    verify_type(Type),
-	    orddict:store(D, Type, Ts)
+    tdb_store(D, verified_type(Type), Ts).
+
+%% tdb_store(Register, Type, Ts0) -> Ts.
+%%  Store a new type for register Register. Return the update type
+%%  database. Use this function when a new value is assigned to
+%%  a register.
+%%
+%%  See the comment for verified_type/1 at the end of module for
+%%  a description of the possible types.
+
+tdb_store(Reg, any, Ts) ->
+    erase(Reg, Ts);
+tdb_store(Reg, Type, Ts) ->
+    store(Reg, verified_type(Type), Ts).
+
+store(Key, New, [{K,_}|_]=Dict) when Key < K ->
+    [{Key,New}|Dict];
+store(Key, New, [{K,Val}=E|Dict]) when Key > K ->
+    case Val of
+        {tuple_element,Key,_} -> store(Key, New, Dict);
+        _ -> [E|store(Key, New, Dict)]
+    end;
+store(Key, New, [{_K,Old}|Dict]) ->		%Key == K
+    case Old of
+        {tuple,_,_,_} ->
+            [{Key,New}|erase_tuple_element(Key, Dict)];
+        _ ->
+            [{Key,New}|Dict]
+    end;
+store(Key, New, []) -> [{Key,New}].
+
+erase(Key, [{K,_}=E|Dict]) when Key < K ->
+    [E|Dict];
+erase(Key, [{K,Val}=E|Dict]) when Key > K ->
+    case Val of
+        {tuple_element,Key,_} -> erase(Key, Dict);
+        _ -> [E|erase(Key, Dict)]
+    end;
+erase(Key, [{_K,Val}|Dict]) ->                 %Key == K
+    case Val of
+        {tuple,_,_,_} -> erase_tuple_element(Key, Dict);
+        _ -> Dict
+    end;
+erase(_, []) -> [].
+
+erase_tuple_element(Key, [{_,{tuple_element,Key,_}}|Dict]) ->
+    erase_tuple_element(Key, Dict);
+erase_tuple_element(Key, [E|Dict]) ->
+    [E|erase_tuple_element(Key, Dict)];
+erase_tuple_element(_Key, []) -> [].
+
+%% tdb_meet(Register, Type, Ts0) -> Ts.
+%%  Update information of a register that is used as the source for an
+%%  instruction. The type Type will be combined using the meet operation
+%%  with the previous type information for the register, resulting in
+%%  narrower (more specific) type.
+%%
+%%  For example, if the previous type is {tuple,min_size,2,[]} and the
+%%  the new type is {tuple,exact_size,5,[]}, the meet of the types will
+%%  be {tuple,exact_size,5,[]}.
+%%
+%%  See the comment for verified_type/1 at the end of module for
+%%  a description of the possible types.
+
+tdb_meet(Reg, NewType, Ts) ->
+    Update = fun(Type0) -> meet(Type0, NewType) end,
+    orddict:update(Reg, Update, NewType, Ts).
+
+%%%
+%%% Here follows internal helper functions for accessing and
+%%% updating the type database.
+%%%
+
+tdb_find_raw({x,_}=K, Ts) -> tdb_find_raw_1(K, Ts);
+tdb_find_raw({y,_}=K, Ts) -> tdb_find_raw_1(K, Ts);
+tdb_find_raw(_, _) -> any.
+
+tdb_find_raw_1(K, Ts) ->
+    case orddict:find(K, Ts) of
+	{ok,Val} -> Val;
+	error -> any
     end.
 
 tag_literal(A) when is_atom(A) -> {atom,A};
@@ -868,45 +1001,6 @@ tag_literal(I) when is_integer(I) -> {integer,I};
 tag_literal([]) -> nil;
 tag_literal(Lit) -> {literal,Lit}.
 
-%% tdb_update([UpdateOp], Db) -> NewDb
-%%        UpdateOp = {Register,kill}|{Register,NewInfo}
-%%  Updates a type database.  If a 'kill' operation is given, the type
-%%  information for that register will be removed from the database.
-%%  A kill operation takes precedence over other operations for the same
-%%  register (i.e. [{{x,0},kill},{{x,0},{tuple,5,[]}}] means that the
-%%  the existing type information, if any, will be discarded, and the
-%%  the '{tuple,5,[]}' information ignored.
-%%
-%%  If NewInfo information is given and there exists information about
-%%  the register, the old and new type information will be merged.
-%%  For instance, {tuple,5,_} and {tuple,10,_} will be merged to produce
-%%  {tuple,10,_}.
-
-tdb_update(Uis0, Ts0) ->
-    Uis1 = filter(fun ({{x,_},_Op}) -> true;
-		      ({{y,_},_Op}) -> true;
-		      (_) -> false
-		  end, Uis0),
-    tdb_update1(lists:sort(Uis1), Ts0).
-
-tdb_update1([{Key,kill}|Ops], [{K,_Old}|_]=Db) when Key < K ->
-    tdb_update1(remove_key(Key, Ops), Db);
-tdb_update1([{Key,Type}=New|Ops], [{K,_Old}|_]=Db) when Key < K ->
-    verify_type(Type),
-    [New|tdb_update1(Ops, Db)];
-tdb_update1([{Key,kill}|Ops], [{Key,_}|Db]) ->
-    tdb_update1(remove_key(Key, Ops), Db);
-tdb_update1([{Key,NewInfo}|Ops], [{Key,OldInfo}|Db]) ->
-    [{Key,merge_type_info(NewInfo, OldInfo)}|tdb_update1(Ops, Db)];
-tdb_update1([{_,_}|_]=Ops, [Old|Db]) ->
-    [Old|tdb_update1(Ops, Db)];
-tdb_update1([{Key,kill}|Ops], []) ->
-    tdb_update1(remove_key(Key, Ops), []);
-tdb_update1([{_,Type}=New|Ops], []) ->
-    verify_type(Type),
-    [New|tdb_update1(Ops, [])];
-tdb_update1([], Db) -> Db.
-
 %% tdb_kill_xregs(Db) -> NewDb
 %%  Kill all information about x registers. Also kill all tuple_element
 %%  dependencies from y registers to x registers.
@@ -915,37 +1009,106 @@ tdb_kill_xregs([{{x,_},_Type}|Db]) -> tdb_kill_xregs(Db);
 tdb_kill_xregs([{{y,_},{tuple_element,{x,_},_}}|Db]) -> tdb_kill_xregs(Db);
 tdb_kill_xregs([Any|Db]) -> [Any|tdb_kill_xregs(Db)];
 tdb_kill_xregs([]) -> [].
-    
-remove_key(Key, [{Key,_Op}|Ops]) -> remove_key(Key, Ops);
-remove_key(_, Ops) -> Ops.
-    
-merge_type_info(I, I) -> I;
-merge_type_info({tuple,Sz1,Same}, {tuple,Sz2,Same}=Max) when Sz1 < Sz2 ->
+
+%% meet(Type1, Type2) -> Type
+%%  Returns the "meet" of Type1 and Type2. The meet is a narrower
+%%  type than Type1 and Type2. For example:
+%%
+%%     meet(integer, {integer,{0,3}}) -> {integer,{0,3}}
+%%
+%%  The meet for two different types result in 'none', which is
+%%  the bottom element for our type lattice:
+%%
+%%     meet(integer, map) -> none
+
+meet(T, T) ->
+    T;
+meet({integer,_}=T, integer) ->
+    T;
+meet(integer, {integer,_}=T) ->
+    T;
+meet({integer,{Min1,Max1}}, {integer,{Min2,Max2}}) ->
+    {integer,{max(Min1, Min2),min(Max1, Max2)}};
+meet({tuple,min_size,Sz1,Same}, {tuple,min_size,Sz2,Same}=Max) when Sz1 < Sz2 ->
     Max;
-merge_type_info({tuple,Sz1,Same}=Max, {tuple,Sz2,Same}) when Sz1 > Sz2 ->
+meet({tuple,min_size,Sz1,Same}=Max, {tuple,min_size,Sz2,Same}) when Sz1 > Sz2 ->
     Max;
-merge_type_info({tuple,Sz1,[]}, {tuple,_Sz2,First}=Tuple2) ->
-    merge_type_info({tuple,Sz1,First}, Tuple2);
-merge_type_info({tuple,_Sz1,First}=Tuple1, {tuple,Sz2,_}) ->
-    merge_type_info(Tuple1, {tuple,Sz2,First});
-merge_type_info(integer, {integer,_}=Int) ->
-    Int;
-merge_type_info({integer,_}=Int, integer) ->
-    Int;
-merge_type_info({integer,{Min1,Max1}}, {integer,{Min2,Max2}}) ->
-    {integer,{max(Min1, Min2),min(Max1, Max2)}};
-merge_type_info(NewType, _) ->
-    verify_type(NewType),
-    NewType.
-
-verify_type({atom,_}) -> ok;
-verify_type(boolean) -> ok;
-verify_type(integer) -> ok;
-verify_type({integer,{Min,Max}})
-  when is_integer(Min), is_integer(Max) -> ok;
-verify_type(map) -> ok;
-verify_type(nonempty_list) -> ok;
-verify_type({tuple,Sz,[]}) when is_integer(Sz) -> ok;
-verify_type({tuple,Sz,[_]}) when is_integer(Sz) -> ok;
-verify_type({tuple_element,_,_}) -> ok;
-verify_type(float) -> ok.
+meet({tuple,exact_size,_,Same}=Exact, {tuple,_,_,Same}) ->
+    Exact;
+meet({tuple,_,_,Same},{tuple,exact_size,_,Same}=Exact) ->
+    Exact;
+meet({tuple,SzKind1,Sz1,[]}, {tuple,_SzKind2,_Sz2,First}=Tuple2) ->
+    meet({tuple,SzKind1,Sz1,First}, Tuple2);
+meet({tuple,_SzKind1,_Sz1,First}=Tuple1, {tuple,SzKind2,Sz2,_}) ->
+    meet(Tuple1, {tuple,SzKind2,Sz2,First});
+meet({binary,U1}, {binary,U2}) ->
+    {binary,max(U1, U2)};
+meet(T1, T2) ->
+    case is_any(T1) of
+        true ->
+            verified_type(T2);
+        false ->
+            case is_any(T2) of
+                true ->
+                    verified_type(T1);
+                false ->
+                    none                        %The bottom element.
+            end
+    end.
+
+is_any(any) -> true;
+is_any({tuple_element,_,_}) -> true;
+is_any(_) -> false.
+
+%% verified_type(Type) -> Type
+%%  Returns the passed in type if it is one of the defined types.
+%%  Crashes if there is anything wrong with the type.
+%%
+%%  Here are all possible types:
+%%
+%%  any                  Any Erlang term (top element for the type lattice).
+%%
+%%  {atom,Atom}          The specific atom Atom.
+%%  {binary,Unit}        Binary/bitstring aligned to unit Unit.
+%%  boolean              'true' | 'false'
+%%  float                Floating point number.
+%%  integer              Integer.
+%%  {integer,{Min,Max}}  Integer in the inclusive range Min through Max.
+%%  map                  Map.
+%%  nonempty_list        Nonempty list.
+%%  {tuple,_,_,_}        Tuple (see below).
+%%
+%%  none                 No type (bottom element for the type lattice).
+%%
+%%  {tuple,min_size,Size,First} means that the corresponding register
+%%  contains a tuple with *at least* Size elements (conversely,
+%%  {tuple,exact_size,Size,First} means that it contains a tuple with
+%%  *exactly* Size elements). An tuple with unknown size is
+%%  represented as {tuple,min_size,0,[]}. First is either [] (meaning
+%%  that the tuple's first element is unknown) or [FirstElement] (the
+%%  contents of the first element).
+%%
+%%  There is also a pseudo-type called {tuple_element,_,_}:
+%%
+%%    {tuple_element,SrcTuple,ElementNumber}
+%%
+%%  that does not provide any information about the type of the
+%%  register itself, but provides a link back to the source tuple that
+%%  the register got its value from.
+%%
+%%  Note that {tuple_element,_,_} will *never* be returned by tdb_find/2.
+%%  Use tdb_find_source_tuple/2 to locate the source tuple for a register.
+
+verified_type(any=T) -> T;
+verified_type({atom,_}=T) -> T;
+verified_type({binary,U}=T) when is_integer(U) -> T;
+verified_type(boolean=T) -> T;
+verified_type(integer=T) -> T;
+verified_type({integer,{Min,Max}}=T)
+  when is_integer(Min), is_integer(Max) -> T;
+verified_type(map=T) -> T;
+verified_type(nonempty_list=T) -> T;
+verified_type({tuple,_,Sz,[]}=T) when is_integer(Sz) -> T;
+verified_type({tuple,_,Sz,[_]}=T) when is_integer(Sz) -> T;
+verified_type({tuple_element,_,_}=T) -> T;
+verified_type(float=T) -> T.
diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl
index 00f396c246..047cd5a569 100644
--- a/lib/compiler/src/beam_utils.erl
+++ b/lib/compiler/src/beam_utils.erl
@@ -22,17 +22,20 @@
 
 -module(beam_utils).
 -export([is_killed_block/2,is_killed/3,is_killed_at/3,
-	 is_not_used/3,
+	 is_not_used/3,usage/3,
 	 empty_label_index/0,index_label/3,index_labels/1,replace_labels/4,
 	 code_at/2,bif_to_test/3,is_pure_test/1,
-	 live_opt/1,delete_live_annos/1,combine_heap_needs/2,
-	 split_even/1]).
+	 live_opt/1,delete_annos/1,combine_heap_needs/2,
+         anno_defs/1,
+	 split_even/1
+        ]).
 
 -export_type([code_index/0,module_code/0,instruction/0]).
 
--import(lists, [map/2,member/2,sort/1,reverse/1,splitwith/2]).
+-import(lists, [flatmap/2,map/2,member/2,sort/1,reverse/1,splitwith/2]).
 
--define(is_const(Val), (element(1, Val) =:= integer orelse
+-define(is_const(Val), (Val =:= nil orelse
+                        element(1, Val) =:= integer orelse
                         element(1, Val) =:= float orelse
                         element(1, Val) =:= atom orelse
                         element(1, Val) =:= literal)).
@@ -59,6 +62,23 @@
 	{lbl :: code_index(),            %Label to code index.
 	 res :: result_cache()}).        %Result cache for each label.
 
+%% usage(Register, [Instruction], State) -> killed|not_used|used.
+%%  Determine the usage of Register in the instruction sequence.
+%%  The return value is one of:
+%%
+%%  killed   - The register is not used in any way.
+%%  not_used - The register is referenced only by an allocating instruction
+%%             (the actual value does not matter).
+%%  used     - The register is used (its value do matter).
+
+-spec usage(beam_asm:reg(), [instruction()], code_index()) ->
+  'killed' | 'not_used' | 'used'.
+
+usage(R, Is, D) ->
+    St = #live{lbl=D,res=gb_trees:empty()},
+    {Usage,_} = check_liveness(R, Is, St),
+    Usage.
+
 
 %% is_killed_block(Register, [Instruction]) -> true|false
 %%  Determine whether a register is killed by the instruction sequence inside
@@ -75,7 +95,7 @@ is_killed_block({x,X}, [{set,_,_,{alloc,Live,_}}|_]) ->
     X >= Live;
 is_killed_block(R, [{set,Ds,Ss,_Op}|Is]) ->
     not member(R, Ss) andalso (member(R, Ds) orelse is_killed_block(R, Is));
-is_killed_block(R, [{'%live',_,Regs}|Is]) ->
+is_killed_block(R, [{'%anno',{used,Regs}}|Is]) ->
     case R of
 	{x,X} when (Regs bsr X) band 1 =:= 0 -> true;
 	_ -> is_killed_block(R, Is)
@@ -98,6 +118,7 @@ is_killed(R, Is, D) ->
     St = #live{lbl=D,res=gb_trees:empty()},
     case check_liveness(R, Is, St) of
 	{killed,_} -> true;
+	{exit_not_used,_} -> false;
 	{_,_} -> false
     end.
 
@@ -110,6 +131,7 @@ is_killed_at(R, Lbl, D) when is_integer(Lbl) ->
     St0 = #live{lbl=D,res=gb_trees:empty()},
     case check_liveness_at(R, Lbl, St0) of
 	{killed,_} -> true;
+	{exit_not_used,_} -> false;
 	{_,_} -> false
     end.
 
@@ -126,6 +148,7 @@ is_not_used(R, Is, D) ->
     St = #live{lbl=D,res=gb_trees:empty()},
     case check_liveness(R, Is, St) of
 	{used,_} -> false;
+	{exit_not_used,_} -> true;
 	{_,_} -> true
     end.
 
@@ -247,7 +270,7 @@ is_pure_test({test,Op,_,Ops}) ->
 %%  Go through the instruction sequence in reverse execution
 %%  order, keep track of liveness and remove 'move' instructions
 %%  whose destination is a register that will not be used.
-%%  Also insert {'%live',Live,Regs} annotations at the beginning
+%%  Also insert {used,Regs} annotations at the beginning
 %%  and end of each block.
 
 -spec live_opt([instruction()]) -> [instruction()].
@@ -262,35 +285,52 @@ live_opt(Is0) ->
     Bef ++ [Fi|live_opt(reverse(Is), 0, D, [])].
 
 
-%% delete_live_annos([Instruction]) -> [Instruction].
-%%  Delete all live annotations.
+%% delete_annos([Instruction]) -> [Instruction].
+%%  Delete all annotations.
 
--spec delete_live_annos([instruction()]) -> [instruction()].
+-spec delete_annos([instruction()]) -> [instruction()].
 
-delete_live_annos([{block,Bl0}|Is]) ->
-    case delete_live_annos(Bl0) of
-	[] -> delete_live_annos(Is);
-	[_|_]=Bl -> [{block,Bl}|delete_live_annos(Is)]
+delete_annos([{block,Bl0}|Is]) ->
+    case delete_annos(Bl0) of
+	[] -> delete_annos(Is);
+	[_|_]=Bl -> [{block,Bl}|delete_annos(Is)]
     end;
-delete_live_annos([{'%live',_,_}|Is]) ->
-    delete_live_annos(Is);
-delete_live_annos([I|Is]) ->
-    [I|delete_live_annos(Is)];
-delete_live_annos([]) -> [].
-    
+delete_annos([{'%anno',_}|Is]) ->
+    delete_annos(Is);
+delete_annos([I|Is]) ->
+    [I|delete_annos(Is)];
+delete_annos([]) -> [].
+
 %% combine_heap_needs(HeapNeed1, HeapNeed2) -> HeapNeed
 %%  Combine the heap need for two allocation instructions.
 
--spec combine_heap_needs(term(), term()) -> term().
+-type heap_need_tag() :: 'floats' | 'words'.
+-type heap_need() :: non_neg_integer() |
+                     {'alloc',[{heap_need_tag(),non_neg_integer()}]}.
+-spec combine_heap_needs(heap_need(), heap_need()) -> heap_need().
 
-combine_heap_needs({alloc,Alloc1}, {alloc,Alloc2}) ->
-    {alloc,combine_alloc_lists(Alloc1, Alloc2)};
-combine_heap_needs({alloc,Alloc}, Words) when is_integer(Words) ->
-    {alloc,combine_alloc_lists(Alloc, [{words,Words}])};
-combine_heap_needs(Words, {alloc,Alloc}) when is_integer(Words) ->
-    {alloc,combine_alloc_lists(Alloc, [{words,Words}])};
 combine_heap_needs(H1, H2) when is_integer(H1), is_integer(H2) ->
-    H1+H2.
+    H1 + H2;
+combine_heap_needs(H1, H2) ->
+    {alloc,combine_alloc_lists([H1,H2])}.
+
+
+%% anno_defs(Instructions) -> Instructions'
+%%  Add {def,RegisterBitmap} annotations to the beginning of
+%%  each block.  Iff bit X is set in the the bitmap, it means
+%%  that {x,X} is defined when the block is entered.
+
+-spec anno_defs([instruction()]) -> [instruction()].
+
+anno_defs(Is0) ->
+    {Bef,[Fi|Is1]} =
+	splitwith(fun({func_info,_,_,_}) -> false;
+		     (_) -> true
+		  end, Is0),
+    {func_info,_,_,Arity} = Fi,
+    Regs = init_def_regs(Arity),
+    Is = defs(Is1, Regs, #{}),
+    Bef ++ [Fi|Is].
 
 %% split_even/1
 %% [1,2,3,4,5,6] -> {[1,3,5],[2,4,6]}
@@ -299,7 +339,6 @@ combine_heap_needs(H1, H2) when is_integer(H1), is_integer(H2) ->
 
 split_even(Rs) -> split_even(Rs, [], []).
 
-
 %%%
 %%% Local functions.
 %%%
@@ -311,12 +350,19 @@ split_even(Rs) -> split_even(Rs, [], []).
 %%
 %%    killed - Reg is assigned or killed by an allocation instruction.
 %%    not_used - the value of Reg is not used, but Reg must not be garbage
+%%    exit_not_used - the value of Reg is not used, but must not be garbage
+%%                    because the stack will be scanned because an
+%%                    exit BIF will raise an exception
 %%    used - Reg is used
 
 check_liveness(R, [{block,Blk}|Is], St0) ->
     case check_liveness_block(R, Blk, St0) of
 	{transparent,St1} ->
 	    check_liveness(R, Is, St1);
+	{alloc_used,St1} ->
+            %% Used by an allocating instruction, but value not referenced.
+            %% Must check the rest of the instructions.
+	    not_used(check_liveness(R, Is, St1));
 	{Other,_}=Res when is_atom(Other) ->
 	    Res
     end;
@@ -330,6 +376,8 @@ check_liveness(R, [{test,_,{f,Fail},As}|Is], St0) ->
 	    case check_liveness_at(R, Fail, St0) of
 		{killed,St1} ->
 		    check_liveness(R, Is, St1);
+		{exit_not_used,St1} ->
+		    check_liveness(R, Is, St1);
 		{not_used,St1} ->
 		    not_used(check_liveness(R, Is, St1));
 		{used,_}=Used ->
@@ -349,6 +397,8 @@ check_liveness(R, [{jump,{f,F}}|_], St) ->
     check_liveness_at(R, F, St);
 check_liveness(R, [{case_end,Used}|_], St) -> 
     check_liveness_ret(R, Used, St);
+check_liveness(R, [{try_case_end,Used}|_], St) ->
+    check_liveness_ret(R, Used, St);
 check_liveness(R, [{badmatch,Used}|_], St) ->
     check_liveness_ret(R, Used, St);
 check_liveness(_, [if_end|_], St) ->
@@ -375,17 +425,27 @@ check_liveness(R, [{bs_init,_,_,none,Ss,Dst}|Is], St) ->
 check_liveness(R, [{bs_init,_,_,Live,Ss,Dst}|Is], St) ->
     case R of
 	{x,X} ->
-	    case X < Live orelse member(R, Ss) of
-		true -> {used,St};
-		false -> {killed,St}
+            case member(R, Ss) of
+                true ->
+                    {used,St};
+                false ->
+                    if
+                        X < Live ->
+                            not_used(check_liveness(R, Is, St));
+                        true ->
+                            {killed,St}
+                    end
 	    end;
 	{y,_} ->
 	    case member(R, Ss) of
 		true -> {used,St};
 		false ->
+                    %% If the exception is taken, the stack may
+                    %% be scanned. Therefore the register is not
+                    %% guaranteed to be killed.
 		    if
-			R =:= Dst -> {killed,St};
-			true -> check_liveness(R, Is, St)
+                        R =:= Dst -> {not_used,St};
+			true -> not_used(check_liveness(R, Is, St))
 		    end
 	    end
     end;
@@ -419,7 +479,7 @@ check_liveness(R, [{call_ext,Live,_}=I|Is], St) ->
 		    %% We must make sure we don't check beyond this
 		    %% instruction or we will fall through into random
 		    %% unrelated code and get stuck in a loop.
-		    {killed,St}
+		    {exit_not_used,St}
 	    end
     end;
 check_liveness(R, [{call_fun,Live}|Is], St) ->
@@ -467,16 +527,12 @@ check_liveness(R, [{make_fun2,_,_,_,NumFree}|Is], St) ->
 	{x,_} -> {killed,St};
 	{y,_} -> not_used(check_liveness(R, Is, St))
     end;
-check_liveness({x,_}=R, [{'catch',_,_}|Is], St) ->
-    %% All x registers will be killed if an exception occurs.
-    %% Therefore we only need to check the liveness for the
-    %% instructions following the catch instruction.
-    check_liveness(R, Is, St);
-check_liveness({x,_}=R, [{'try',_,_}|Is], St) ->
-    %% All x registers will be killed if an exception occurs.
-    %% Therefore we only need to check the liveness for the
-    %% instructions inside the 'try' block.
-    check_liveness(R, Is, St);
+check_liveness(R, [{'catch'=Op,Y,Fail}|Is], St) ->
+    Set = {set,[Y],[],{try_catch,Op,Fail}},
+    check_liveness(R, [{block,[Set]}|Is], St);
+check_liveness(R, [{'try'=Op,Y,Fail}|Is], St) ->
+    Set = {set,[Y],[],{try_catch,Op,Fail}},
+    check_liveness(R, [{block,[Set]}|Is], St);
 check_liveness(R, [{try_end,Y}|Is], St) ->
     case R of
 	Y ->
@@ -537,15 +593,34 @@ check_liveness(R, [{get_map_elements,{f,Fail},S,{list,L}}|Is], St0) ->
 check_liveness(R, [{put_map,F,Op,S,D,Live,{list,Puts}}|Is], St) ->
     Set = {set,[D],[S|Puts],{alloc,Live,{put_map,Op,F}}},
     check_liveness(R, [{block,[Set]}||Is], St);
+check_liveness(R, [{put_tuple,Ar,D}|Is], St) ->
+    Set = {set,[D],[],{put_tuple,Ar}},
+    check_liveness(R, [{block,[Set]}||Is], St);
+check_liveness(R, [{put_list,S1,S2,D}|Is], St) ->
+    Set = {set,[D],[S1,S2],put_list},
+    check_liveness(R, [{block,[Set]}||Is], St);
 check_liveness(R, [{test_heap,N,Live}|Is], St) ->
     I = {block,[{set,[],[],{alloc,Live,{nozero,nostack,N,[]}}}]},
     check_liveness(R, [I|Is], St);
 check_liveness(R, [{allocate_zero,N,Live}|Is], St) ->
     I = {block,[{set,[],[],{alloc,Live,{zero,N,0,[]}}}]},
     check_liveness(R, [I|Is], St);
-check_liveness(R, [{get_list,S,D1,D2}|Is], St) ->
-    I = {block,[{set,[D1,D2],[S],get_list}]},
+check_liveness(R, [{get_hd,S,D}|Is], St) ->
+    I = {block,[{set,[D],[S],get_hd}]},
+    check_liveness(R, [I|Is], St);
+check_liveness(R, [{get_tl,S,D}|Is], St) ->
+    I = {block,[{set,[D],[S],get_tl}]},
     check_liveness(R, [I|Is], St);
+check_liveness(R, [remove_message|Is], St) ->
+    check_liveness(R, Is, St);
+check_liveness({x,X}, [build_stacktrace|_], St) when X > 0 ->
+    {killed,St};
+check_liveness(R, [{recv_mark,_}|Is], St) ->
+    check_liveness(R, Is, St);
+check_liveness(R, [{recv_set,_}|Is], St) ->
+    check_liveness(R, Is, St);
+check_liveness(R, [{'%',_}|Is], St) ->
+    check_liveness(R, Is, St);
 check_liveness(_R, Is, St) when is_list(Is) ->
     %% Not implemented. Conservatively assume that the register is used.
     {used,St}.
@@ -580,6 +655,7 @@ check_liveness_at(R, Lbl, #live{lbl=Ll,res=ResMemorized}=St0) ->
 	    {Res,St#live{res=gb_trees:insert(Lbl, Res, St#live.res)}}
     end.
 
+not_used({exit_not_used,St}) -> {not_used,St};
 not_used({killed,St}) -> {not_used,St};
 not_used({_,_}=Res) -> Res.
 
@@ -587,7 +663,7 @@ check_liveness_ret(R, R, St) -> {used,St};
 check_liveness_ret(_, _, St) -> {killed,St}.
 
 %% check_liveness_block(Reg, [Instruction], State) ->
-%%     {killed | not_used | used | transparent,State'}
+%%     {killed | not_used | used | alloc_used | transparent,State'}
 %%  Finds out how Reg is used in the instruction sequence inside a block.
 %%  Returns one of:
 %%    killed - Reg is assigned a new value or killed by an
@@ -595,9 +671,10 @@ check_liveness_ret(_, _, St) -> {killed,St}.
 %%    not_used - The value is not used, but the register is referenced
 %%       e.g. by an allocation instruction
 %%    transparent - Reg is neither used nor killed
+%%    alloc_used - Used only in an allocate instruction
 %%    used - Reg is explicitly used by an instruction
 %%
-%%  '%live' annotations are not allowed.
+%%  Annotations are not allowed.
 %%
 %%  (Unknown instructions will cause an exception.)
 
@@ -607,13 +684,30 @@ check_liveness_block({x,X}=R, [{set,Ds,Ss,{alloc,Live,Op}}|Is], St0) ->
 	    {killed,St0};
 	true ->
 	    case check_liveness_block_1(R, Ss, Ds, Op, Is, St0) of
-		{killed,St} -> {not_used,St};
-		{transparent,St} -> {not_used,St};
-		{_,_}=Res -> Res
+                {transparent,St} -> {alloc_used,St};
+		{_,_}=Res -> not_used(Res)
 	    end
     end;
-check_liveness_block({y,_}=R, [{set,Ds,Ss,{alloc,_Live,Op}}|Is], St) ->
-    check_liveness_block_1(R, Ss, Ds, Op, Is, St);
+check_liveness_block({y,_}=R, [{set,Ds,Ss,{alloc,_Live,Op}}|Is], St0) ->
+    case check_liveness_block_1(R, Ss, Ds, Op, Is, St0) of
+        {transparent,St} -> {alloc_used,St};
+        {_,_}=Res -> not_used(Res)
+    end;
+check_liveness_block({y,_}=R, [{set,Ds,Ss,{try_catch,_,Op}}|Is], St0) ->
+    case Ds of
+        [R] ->
+            {killed,St0};
+        _ ->
+            case check_liveness_block_1(R, Ss, Ds, Op, Is, St0) of
+                {exit_not_used,St} ->
+                    {used,St};
+                {transparent,St} ->
+                    %% Conservatively assumed that it is used.
+                    {used,St};
+                {_,_}=Res ->
+                    Res
+            end
+    end;
 check_liveness_block(R, [{set,Ds,Ss,Op}|Is], St) ->
     check_liveness_block_1(R, Ss, Ds, Op, Is, St);
 check_liveness_block(_, [], St) -> {transparent,St}.
@@ -629,6 +723,11 @@ check_liveness_block_1(R, Ss, Ds, Op, Is, St0) ->
 			true -> {killed,St};
 			false -> check_liveness_block(R, Is, St)
 		    end;
+		{exit_not_used,St} ->
+		    case member(R, Ds) of
+			true -> {exit_not_used,St};
+			false -> check_liveness_block(R, Is, St)
+		    end;
 		{not_used,St} ->
 		    not_used(case member(R, Ds) of
 				 true -> {killed,St};
@@ -639,8 +738,8 @@ check_liveness_block_1(R, Ss, Ds, Op, Is, St0) ->
 	    end
     end.
 
-check_liveness_block_2(R, {gc_bif,_Op,{f,Lbl}}, _Ss, St) ->
-    check_liveness_block_3(R, Lbl, St);
+check_liveness_block_2(R, {gc_bif,Op,{f,Lbl}}, Ss, St) ->
+    check_liveness_block_3(R, Lbl, {Op,length(Ss)}, St);
 check_liveness_block_2(R, {bif,Op,{f,Lbl}}, Ss, St) ->
     Arity = length(Ss),
     case erl_internal:comp_op(Op, Arity) orelse
@@ -648,16 +747,23 @@ check_liveness_block_2(R, {bif,Op,{f,Lbl}}, Ss, St) ->
 	true ->
 	    {killed,St};
 	false ->
-	    check_liveness_block_3(R, Lbl, St)
+	    check_liveness_block_3(R, Lbl, {Op,length(Ss)}, St)
     end;
 check_liveness_block_2(R, {put_map,_Op,{f,Lbl}}, _Ss, St) ->
-    check_liveness_block_3(R, Lbl, St);
+    check_liveness_block_3(R, Lbl, {unsafe,0}, St);
 check_liveness_block_2(_, _, _, St) ->
     {killed,St}.
 
-check_liveness_block_3(_, 0, St) ->
+check_liveness_block_3({x,_}, 0, _FA, St) ->
     {killed,St};
-check_liveness_block_3(R, Lbl, St0) ->
+check_liveness_block_3({y,_}, 0, {F,A}, St) ->
+    %% If the exception is thrown, the stack may be scanned,
+    %% thus implicitly using the y register.
+    case erl_bifs:is_safe(erlang, F, A) of
+        true -> {killed,St};
+        false -> {used,St}
+    end;
+check_liveness_block_3(R, Lbl, _FA, St0) ->
     check_liveness_at(R, Lbl, St0).
 
 index_labels_1([{label,Lbl}|Is0], Acc) ->
@@ -695,6 +801,10 @@ replace_labels_1([{wait,{f,Lbl}}|Is], Acc, D, Fb) ->
     replace_labels_1(Is, [{wait,{f,label(Lbl, D, Fb)}}|Acc], D, Fb);
 replace_labels_1([{wait_timeout,{f,Lbl},To}|Is], Acc, D, Fb) ->
     replace_labels_1(Is, [{wait_timeout,{f,label(Lbl, D, Fb)},To}|Acc], D, Fb);
+replace_labels_1([{recv_mark=Op,{f,Lbl}}|Is], Acc, D, Fb) ->
+    replace_labels_1(Is, [{Op,{f,label(Lbl, D, Fb)}}|Acc], D, Fb);
+replace_labels_1([{recv_set=Op,{f,Lbl}}|Is], Acc, D, Fb) ->
+    replace_labels_1(Is, [{Op,{f,label(Lbl, D, Fb)}}|Acc], D, Fb);
 replace_labels_1([{bif,Name,{f,Lbl},As,R}|Is], Acc, D, Fb) when Lbl =/= 0 ->
     replace_labels_1(Is, [{bif,Name,{f,label(Lbl, D, Fb)},As,R}|Acc], D, Fb);
 replace_labels_1([{gc_bif,Name,{f,Lbl},Live,As,R}|Is], Acc, D, Fb) when Lbl =/= 0 ->
@@ -722,22 +832,18 @@ label(Old, D, Fb) ->
         _ -> Fb(Old)
     end.
 
-%% Help functions for combine_heap_needs.
+%% Help function for combine_heap_needs.
 
-combine_alloc_lists(Al1, Al2) ->
-    combine_alloc_lists_1(sort(Al1++Al2)).
-
-combine_alloc_lists_1([{words,W1},{words,W2}|T])
-  when is_integer(W1), is_integer(W2) ->
-    [{words,W1+W2}|combine_alloc_lists_1(T)];
-combine_alloc_lists_1([{floats,F1},{floats,F2}|T])
-  when is_integer(F1), is_integer(F2) ->
-    [{floats,F1+F2}|combine_alloc_lists_1(T)];
-combine_alloc_lists_1([{words,_}=W|T]) ->
-    [W|combine_alloc_lists_1(T)];
-combine_alloc_lists_1([{floats,_}=F|T]) ->
-    [F|combine_alloc_lists_1(T)];
-combine_alloc_lists_1([]) -> [].
+combine_alloc_lists(Al0) ->
+    Al1 = flatmap(fun(Words) when is_integer(Words) ->
+                         [{words,Words}];
+                    ({alloc,List}) ->
+                         List
+                 end, Al0),
+    Al2 = sofs:relation(Al1),
+    Al3 = sofs:relation_to_family(Al2),
+    Al4 = sofs:to_external(Al3),
+    [{Tag,lists:sum(L)} || {Tag,L} <- Al4].
 
 %% live_opt/4.
 
@@ -776,10 +882,14 @@ live_opt([{test,bs_start_match2,Fail,Live,[Src,_],_}=I|Is], _, D, Acc) ->
 
 %% Other instructions.
 live_opt([{block,Bl0}|Is], Regs0, D, Acc) ->
-    Live0 = {'%live',live_regs(Regs0),Regs0},
+    Live0 = make_anno({used,Regs0}),
     {Bl,Regs} = live_opt_block(reverse(Bl0), Regs0, D, [Live0]),
-    Live = {'%live',live_regs(Regs),Regs},
+    Live = make_anno({used,Regs}),
     live_opt(Is, Regs, D, [{block,[Live|Bl]}|Acc]);
+live_opt([build_stacktrace=I|Is], _, D, Acc) ->
+    live_opt(Is, live_call(1), D, [I|Acc]);
+live_opt([raw_raise=I|Is], _, D, Acc) ->
+    live_opt(Is, live_call(3), D, [I|Acc]);
 live_opt([{label,L}=I|Is], Regs, D0, Acc) ->
     D = gb_trees:insert(L, Regs, D0),
     live_opt(Is, Regs, D, [I|Acc]);
@@ -821,7 +931,8 @@ live_opt([{test,_,Fail,Live,Ss,_}=I|Is], _, D, Acc) ->
     Regs1 = x_live(Ss, Regs0),
     Regs = live_join_label(Fail, D, Regs1),
     live_opt(Is, Regs, D, [I|Acc]);
-live_opt([{select,_,Src,Fail,List}=I|Is], Regs0, D, Acc) ->
+live_opt([{select,_,Src,Fail,List}=I|Is], _, D, Acc) ->
+    Regs0 = 0,
     Regs1 = x_live([Src], Regs0),
     Regs = live_join_labels([Fail|List], D, Regs1),
     live_opt(Is, Regs, D, [I|Acc]);
@@ -844,6 +955,25 @@ live_opt([{get_map_elements,Fail,Src,{list,List}}=I|Is], Regs0, D, Acc) ->
     Regs1 = x_live([Src|Ss], x_dead(Ds, Regs0)),
     Regs = live_join_label(Fail, D, Regs1),
     live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{gc_bif,N,F,R,As,Dst}=I|Is], Regs0, D, Acc) ->
+    Bl = [{set,[Dst],As,{alloc,R,{gc_bif,N,F}}}],
+    {_,Regs} = live_opt_block(Bl, Regs0, D, []),
+    live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{bif,N,F,As,Dst}=I|Is], Regs0, D, Acc) ->
+    Bl = [{set,[Dst],As,{bif,N,F}}],
+    {_,Regs} = live_opt_block(Bl, Regs0, D, []),
+    live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{get_tuple_element,Src,Idx,Dst}=I|Is], Regs0, D, Acc) ->
+    Bl = [{set,[Dst],[Src],{get_tuple_element,Idx}}],
+    {_,Regs} = live_opt_block(Bl, Regs0, D, []),
+    live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{move,Src,Dst}=I|Is], Regs0, D, Acc) ->
+    Regs = x_live([Src], x_dead([Dst], Regs0)),
+    live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{put_map,F,Op,S,Dst,R,{list,Puts}}=I|Is], Regs0, D, Acc) ->
+    Bl = [{set,[Dst],[S|Puts],{alloc,R,{put_map,Op,F}}}],
+    {_,Regs} = live_opt_block(Bl, Regs0, D, []),
+    live_opt(Is, Regs, D, [I|Acc]);
 
 %% Transparent instructions - they neither use nor modify x registers.
 live_opt([{deallocate,_}=I|Is], Regs, D, Acc) ->
@@ -860,6 +990,10 @@ live_opt([{wait_timeout,_,{Tag,_}}=I|Is], Regs, D, Acc) when Tag =/= x ->
     live_opt(Is, Regs, D, [I|Acc]);
 live_opt([{line,_}=I|Is], Regs, D, Acc) ->
     live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{'catch',_,_}=I|Is], Regs, D, Acc) ->
+    live_opt(Is, Regs, D, [I|Acc]);
+live_opt([{'try',_,_}=I|Is], Regs, D, Acc) ->
+    live_opt(Is, Regs, D, [I|Acc]);
 
 %% The following instructions can occur if the "compilation" has been
 %% started from a .S file using the 'from_asm' option.
@@ -874,47 +1008,52 @@ live_opt([{recv_mark,_}=I|Is], Regs, D, Acc) ->
 
 live_opt([], _, _, Acc) -> Acc.
 
-live_opt_block([{set,Ds,Ss,Op0}|Is], Regs0, D, Acc) ->
-    Regs1 = x_live(Ss, x_dead(Ds, Regs0)),
-    {Op, Regs} = live_opt_block_op(Op0, Regs1, D),
-    I = {set, Ds, Ss, Op},
-
-    case Ds of
-        [{x,X}] ->
-            case (not is_live(X, Regs0)) andalso Op =:= move of
-                true ->
-                    live_opt_block(Is, Regs0, D, Acc);
-                false ->
-                    live_opt_block(Is, Regs, D, [I|Acc])
-            end;
-        _ ->
-            live_opt_block(Is, Regs, D, [I|Acc])
+live_opt_block([{set,[{x,X}]=Ds,Ss,move}=I|Is], Regs0, D, Acc) ->
+    Regs = x_live(Ss, x_dead(Ds, Regs0)),
+    case is_live(X, Regs0) of
+        true ->
+            live_opt_block(Is, Regs, D, [I|Acc]);
+        false ->
+            %% Useless move, will never be used.
+            live_opt_block(Is, Regs, D, Acc)
     end;
-live_opt_block([{'%live',_,_}|Is], Regs, D, Acc) ->
-    live_opt_block(Is, Regs, D, Acc);
-live_opt_block([], Regs, _, Acc) -> {Acc,Regs}.
-
-live_opt_block_op({alloc,Live0,AllocOp}, Regs0, D) ->
-    Regs =
-        case AllocOp of
-            {Kind, _N, Fail} when Kind =:= gc_bif; Kind =:= put_map ->
-                live_join_label(Fail, D, Regs0);
-            _ ->
-                Regs0
-        end,
+live_opt_block([{set,Ds,Ss,{alloc,Live0,AllocOp}}|Is], Regs0, D, Acc) ->
+    %% Calculate liveness from the point of view of the GC.
+    %% There will never be a GC if the instruction fails, so we should
+    %% ignore the failure branch.
+    GcRegs1 = x_dead(Ds, Regs0),
+    GcRegs = x_live(Ss, GcRegs1),
+    Live = live_regs(GcRegs),
 
     %% The life-time analysis used by the code generator is sometimes too
     %% conservative, so it may be possible to lower the number of live
     %% registers based on the exact liveness information. The main benefit is
     %% that more optimizations that depend on liveness information (such as the
-    %% beam_bool and beam_dead passes) may be applied.
-    Live = live_regs(Regs),
-    true = Live =< Live0,
-    {{alloc,Live,AllocOp}, live_call(Live)};
-live_opt_block_op({bif,_N,Fail} = Op, Regs, D) ->
-    {Op, live_join_label(Fail, D, Regs)};
-live_opt_block_op(Op, Regs, _D) ->
-    {Op, Regs}.
+    %% beam_dead pass) may be applied.
+    true = Live =< Live0,                       %Assertion.
+    I = {set,Ds,Ss,{alloc,Live,AllocOp}},
+
+    %% Calculate liveness from the point of view of the preceding instruction.
+    %% The liveness is the union of live registers in the GC and the live
+    %% registers at the failure label.
+    Regs1 = live_call(Live),
+    Regs = live_join_alloc(AllocOp, D, Regs1),
+    live_opt_block(Is, Regs, D, [I|Acc]);
+live_opt_block([{set,Ds,Ss,{bif,_,Fail}}=I|Is], Regs0, D, Acc) ->
+    Regs1 = x_dead(Ds, Regs0),
+    Regs2 = x_live(Ss, Regs1),
+    Regs = live_join_label(Fail, D, Regs2),
+    live_opt_block(Is, Regs, D, [I|Acc]);
+live_opt_block([{set,Ds,Ss,_}=I|Is], Regs0, D, Acc) ->
+    Regs = x_live(Ss, x_dead(Ds, Regs0)),
+    live_opt_block(Is, Regs, D, [I|Acc]);
+live_opt_block([{'%anno',_}|Is], Regs, D, Acc) ->
+    live_opt_block(Is, Regs, D, Acc);
+live_opt_block([], Regs, _, Acc) -> {Acc,Regs}.
+
+live_join_alloc({Kind,_Name,Fail}, D, Regs) when Kind =:= gc_bif; Kind =:= put_map ->
+    live_join_label(Fail, D, Regs);
+live_join_alloc(_, _, Regs) -> Regs.
 
 live_join_labels([{f,L}|T], D, Regs0) when L =/= 0 ->
     Regs = gb_trees:get(L, D) bor Regs0,
@@ -950,3 +1089,220 @@ split_even([], Ss, Ds) ->
     {reverse(Ss),reverse(Ds)};
 split_even([S,D|Rs], Ss, Ds) ->
     split_even(Rs, [S|Ss], [D|Ds]).
+
+%%%
+%%% Add annotations for defined registers.
+%%%
+%%% This analysis is done by scanning the instructions in
+%%% execution order.
+%%%
+
+defs([{apply,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, 1, D)];
+defs([{bif,_,{f,Fail},_Src,Dst}=I|Is], Regs0, D) ->
+    Regs = def_regs([Dst], Regs0),
+    [I|defs(Is, Regs, update_regs(Fail, Regs0, D))];
+defs([{block,Block0}|Is], Regs0, D0) ->
+    {Block,Regs,D} = defs_list(Block0, Regs0, D0),
+    [{block,[make_anno({def,Regs0})|Block]}|defs(Is, Regs, D)];
+defs([{bs_init,{f,L},_,_,_,Dst}=I|Is], Regs0, D) ->
+    Regs = def_regs([Dst], Regs0),
+    [I|defs(Is, Regs, update_regs(L, Regs, D))];
+defs([{bs_put,{f,L},_,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, update_regs(L, Regs, D))];
+defs([build_stacktrace=I|Is], _Regs, D) ->
+    [I|defs(Is, 1, D)];
+defs([{call,_,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, 1, D)];
+defs([{call_ext,_,{extfunc,M,F,A}}=I|Is], _Regs, D) ->
+    case erl_bifs:is_exit_bif(M, F, A) of
+        false ->
+            [I|defs(Is, 1, D)];
+        true ->
+            [I|defs_unreachable(Is, D)]
+    end;
+defs([{call_ext,_,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, 1, D)];
+defs([{call_fun,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, 1, D)];
+defs([{'catch',_,{f,L}}=I|Is], Regs, D) ->
+    RegsAtLabel = init_def_regs(1),
+    [I|defs(Is, Regs, update_regs(L, RegsAtLabel, D))];
+defs([{catch_end,_}=I|Is], _Regs, D) ->
+    Regs = init_def_regs(1),
+    [I|defs(Is, Regs, D)];
+defs([{gc_bif,_,{f,Fail},Live,_Src,Dst}=I|Is], Regs0, D) ->
+    true = all_defined(Live, Regs0),            %Assertion.
+    Regs = def_regs([Dst], init_def_regs(Live)),
+    [I|defs(Is, Regs, update_regs(Fail, Regs0, D))];
+defs([{get_map_elements,{f,L},_Src,{list,DstList}}=I|Is], Regs0, D) ->
+    {_,Ds} = beam_utils:split_even(DstList),
+    Regs = def_regs(Ds, Regs0),
+    [I|defs(Is, Regs, update_regs(L, Regs0, D))];
+defs([{get_tuple_element,_,_,Dst}=I|Is], Regs0, D) ->
+    Regs = def_regs([Dst], Regs0),
+    [I|defs(Is, Regs, D)];
+defs([{jump,{f,L}}=I|Is], Regs, D) ->
+    [I|defs_unreachable(Is, update_regs(L, Regs, D))];
+defs([{label,L}=I|Is], Regs0, D) ->
+    case D of
+        #{L:=Regs1} ->
+            Regs = Regs0 band Regs1,
+            [I|defs(Is, Regs, D)];
+        #{} ->
+            [I|defs(Is, Regs0, D)]
+    end;
+defs([{loop_rec,{f,L},{x,0}}=I|Is], _Regs, D0) ->
+    RegsAtLabel = init_def_regs(0),
+    D = update_regs(L, RegsAtLabel, D0),
+    [I|defs(Is, init_def_regs(1), D)];
+defs([{loop_rec_end,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, 0, D)];
+defs([{make_fun2,_,_,_,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, 1, D)];
+defs([{move,_,Dst}=I|Is], Regs0, D) ->
+    Regs = def_regs([Dst], Regs0),
+    [I|defs(Is, Regs, D)];
+defs([{put_map,{f,Fail},_,_,Dst,_,_}=I|Is], Regs0, D) ->
+    Regs = def_regs([Dst], Regs0),
+    [I|defs(Is, Regs, update_regs(Fail, Regs0, D))];
+defs([raw_raise=I|Is], _Regs, D) ->
+    [I|defs(Is, 1, D)];
+defs([return=I|Is], _Regs, D) ->
+    [I|defs_unreachable(Is, D)];
+defs([{select,_,_Src,Fail,List}=I|Is], Regs, D0) ->
+    D = update_list([Fail|List], Regs, D0),
+    [I|defs_unreachable(Is, D)];
+defs([{test,_,{f,L},_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, update_regs(L, Regs, D))];
+defs([{test,_,{f,L},Live,_,Dst}=I|Is], Regs0, D) ->
+    true = all_defined(Live, Regs0),             %Assertion.
+    Regs = def_regs([Dst], init_def_regs(Live)),
+    [I|defs(Is, Regs, update_regs(L, Regs0, D))];
+defs([{'try',_,{f,L}}=I|Is], Regs, D) ->
+    RegsAtLabel = init_def_regs(3),
+    [I|defs(Is, Regs, update_regs(L, RegsAtLabel, D))];
+defs([{try_case,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, init_def_regs(3), D)];
+defs([{wait,_}=I|Is], _Regs, D) ->
+    [I|defs_unreachable(Is, D)];
+defs([{wait_timeout,_,_}=I|Is], _Regs, D) ->
+    [I|defs(Is, 0, D)];
+
+%% Exceptions.
+defs([{badmatch,_}=I|Is], _Regs, D) ->
+    [I|defs_unreachable(Is, D)];
+defs([{case_end,_}=I|Is], _Regs, D) ->
+    [I|defs_unreachable(Is, D)];
+defs([if_end=I|Is], _Regs, D) ->
+    [I|defs_unreachable(Is, D)];
+defs([{try_case_end,_}=I|Is], _Regs, D) ->
+    [I|defs_unreachable(Is, D)];
+
+%% Neutral instructions
+defs([{bs_context_to_binary,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{bs_restore2,_,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{bs_save2,_,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{deallocate,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{kill,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{line,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{recv_mark,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{recv_set,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([timeout=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{trim,_,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{try_end,_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([{'%',_}=I|Is], Regs, D) ->
+    [I|defs(Is, Regs, D)];
+defs([], _, _) -> [].
+
+defs_unreachable([{label,L}=I|Is], D) ->
+    case D of
+        #{L:=Regs} ->
+            [I|defs(Is, Regs, D)];
+        #{} ->
+            defs_unreachable(Is, D)
+    end;
+defs_unreachable([_|Is], D) ->
+    defs_unreachable(Is, D);
+defs_unreachable([], _D) -> [].
+
+defs_list(Is, Regs, D) ->
+    defs_list(Is, Regs, D, []).
+
+defs_list([{set,Ds,_,{alloc,Live,Info}}=I|Is], Regs0, D0, Acc) ->
+    true = all_defined(Live, Regs0),             %Assertion.
+    D = case Info of
+            {gc_bif,_,{f,Fail}} ->
+                update_regs(Fail, Regs0, D0);
+            {put_map,_,{f,Fail}} ->
+                update_regs(Fail, Regs0, D0);
+            _ ->
+                D0
+        end,
+    Regs = def_regs(Ds, init_def_regs(Live)),
+    defs_list(Is, Regs, D, [I|Acc]);
+defs_list([{set,Ds,_,Info}=I|Is], Regs0, D0, Acc) ->
+    D = case Info of
+            {bif,_,{f,Fail}} ->
+                update_regs(Fail, Regs0, D0);
+            {try_catch,'catch',{f,Fail}} ->
+                update_regs(Fail, init_def_regs(1), D0);
+            {try_catch,'try',{f,Fail}} ->
+                update_regs(Fail, init_def_regs(3), D0);
+            _ ->
+                D0
+        end,
+    Regs = def_regs(Ds, Regs0),
+    defs_list(Is, Regs, D, [I|Acc]);
+defs_list([], Regs, D, Acc) ->
+    {reverse(Acc),Regs,D}.
+
+init_def_regs(Arity) ->
+    (1 bsl Arity) - 1.
+
+def_regs([{x,X}|T], Regs) ->
+    def_regs(T, Regs bor (1 bsl X));
+def_regs([_|T], Regs) ->
+    def_regs(T, Regs);
+def_regs([], Regs) -> Regs.
+
+update_list([{f,L}|T], Regs, D0) ->
+    D = update_regs(L, Regs, D0),
+    update_list(T, Regs, D);
+update_list([_|T], Regs, D) ->
+    update_list(T, Regs, D);
+update_list([], _Regs, D) -> D.
+
+update_regs(L, Regs0, D) ->
+    case D of
+        #{L:=Regs1} ->
+            Regs = Regs0 band Regs1,
+            D#{L:=Regs};
+        #{} ->
+            D#{L=>Regs0}
+    end.
+
+all_defined(Live, Regs) ->
+    All = (1 bsl Live) - 1,
+    Regs band All =:= All.
+
+%%%
+%%% Utilities.
+%%%
+
+%% make_anno(Anno) -> WrappedAnno.
+%%  Wrap an annotation term.
+
+make_anno(Anno) ->
+    {'%anno',Anno}.
diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl
index be8908dd6b..c30ab34ac7 100644
--- a/lib/compiler/src/beam_validator.erl
+++ b/lib/compiler/src/beam_validator.erl
@@ -85,8 +85,6 @@ format_error(Error) ->
 %%% Things currently not checked. XXX
 %%%
 %%% - Heap allocation for binaries.
-%%% - That put_tuple is followed by the correct number of
-%%%   put instructions.
 %%%
 
 %% validate(Module, [Function]) -> [] | [Error]
@@ -130,9 +128,8 @@ validate_0(Module, [{function,Name,Ar,Entry,Code}|Fs], Ft) ->
 	throw:Error ->
 	    %% Controlled error.
 	    [Error|validate_0(Module, Fs, Ft)];
-	Class:Error ->
+        Class:Error:Stack ->
 	    %% Crash.
-	    Stack = erlang:get_stacktrace(),
 	    io:fwrite("Function: ~w/~w\n", [Name,Ar]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -149,7 +146,8 @@ validate_0(Module, [{function,Name,Ar,Entry,Code}|Fs], Ft) ->
 	 hf=0,				%Available heap size for floats.
 	 fls=undefined,			%Floating point state.
 	 ct=[],				%List of hot catch/try labels
-	 setelem=false			%Previous instruction was setelement/3.
+         setelem=false,                 %Previous instruction was setelement/3.
+         puts_left=none                 %put/1 instructions left.
 	}).
 
 -type label()        :: integer().
@@ -294,6 +292,8 @@ valfun_1({bs_context_to_binary,Ctx}, #vst{current=#st{x=Xs}}=Vst) ->
     end;
 valfun_1(bs_init_writable=I, Vst) ->
     call(I, 1, Vst);
+valfun_1(build_stacktrace=I, Vst) ->
+    call(I, 1, Vst);
 valfun_1({move,{y,_}=Src,{y,_}=Dst}, Vst) ->
     %% The stack trimming optimization may generate a move from an initialized
     %% but unassigned Y register to another Y register.
@@ -339,11 +339,25 @@ valfun_1({put_list,A,B,Dst}, Vst0) ->
     Vst = eat_heap(2, Vst0),
     set_type_reg(cons, Dst, Vst);
 valfun_1({put_tuple,Sz,Dst}, Vst0) when is_integer(Sz) ->
+    Vst1 = eat_heap(1, Vst0),
+    Vst = set_type_reg(tuple_in_progress, Dst, Vst1),
+    #vst{current=St0} = Vst,
+    St = St0#st{puts_left={Sz,{Dst,{tuple,Sz}}}},
+    Vst#vst{current=St};
+valfun_1({put,Src}, Vst0) ->
+    assert_term(Src, Vst0),
     Vst = eat_heap(1, Vst0),
-    set_type_reg({tuple,Sz}, Dst, Vst);
-valfun_1({put,Src}, Vst) ->
-    assert_term(Src, Vst),
-    eat_heap(1, Vst);
+    #vst{current=St0} = Vst,
+    case St0 of
+        #st{puts_left=none} ->
+            error(not_building_a_tuple);
+        #st{puts_left={1,{Dst,Type}}} ->
+            St = St0#st{puts_left=none},
+            set_type_reg(Type, Dst, Vst#vst{current=St});
+        #st{puts_left={PutsLeft,Info}} when is_integer(PutsLeft) ->
+            St = St0#st{puts_left={PutsLeft-1,Info}},
+            Vst#vst{current=St}
+    end;
 %% Instructions for optimization of selective receives.
 valfun_1({recv_mark,{f,Fail}}, Vst) when is_integer(Fail) ->
     Vst;
@@ -523,15 +537,18 @@ valfun_4({bif,element,{f,Fail},[Pos,Tuple],Dst}, Vst0) ->
 valfun_4({bif,raise,{f,0},Src,_Dst}, Vst) ->
     validate_src(Src, Vst),
     kill_state(Vst);
+valfun_4(raw_raise=I, Vst) ->
+    call(I, 3, Vst);
 valfun_4({bif,Op,{f,Fail},Src,Dst}, Vst0) ->
     validate_src(Src, Vst0),
     Vst = branch_state(Fail, Vst0),
     Type = bif_type(Op, Src, Vst),
     set_type_reg(Type, Dst, Vst);
 valfun_4({gc_bif,Op,{f,Fail},Live,Src,Dst}, #vst{current=St0}=Vst0) ->
+    verify_live(Live, Vst0),
+    verify_y_init(Vst0),
     St = kill_heap_allocation(St0),
     Vst1 = Vst0#vst{current=St},
-    verify_live(Live, Vst1),
     Vst2 = branch_state(Fail, Vst1),
     Vst = prune_x_regs(Live, Vst2),
     validate_src(Src, Vst),
@@ -574,6 +591,12 @@ valfun_4({get_list,Src,D1,D2}, Vst0) ->
     assert_type(cons, Src, Vst0),
     Vst = set_type_reg(term, D1, Vst0),
     set_type_reg(term, D2, Vst);
+valfun_4({get_hd,Src,Dst}, Vst) ->
+    assert_type(cons, Src, Vst),
+    set_type_reg(term, Dst, Vst);
+valfun_4({get_tl,Src,Dst}, Vst) ->
+    assert_type(cons, Src, Vst),
+    set_type_reg(term, Dst, Vst);
 valfun_4({get_tuple_element,Src,I,Dst}, Vst) ->
     assert_type({tuple_element,I+1}, Src, Vst),
     set_type_reg(term, Dst, Vst);
@@ -685,6 +708,7 @@ valfun_4({bs_utf16_size,{f,Fail},A,Dst}, Vst) ->
     set_type_reg({integer,[]}, Dst, branch_state(Fail, Vst));
 valfun_4({bs_init2,{f,Fail},Sz,Heap,Live,_,Dst}, Vst0) ->
     verify_live(Live, Vst0),
+    verify_y_init(Vst0),
     if
 	is_integer(Sz) ->
 	    ok;
@@ -697,6 +721,7 @@ valfun_4({bs_init2,{f,Fail},Sz,Heap,Live,_,Dst}, Vst0) ->
     set_type_reg(binary, Dst, Vst);
 valfun_4({bs_init_bits,{f,Fail},Sz,Heap,Live,_,Dst}, Vst0) ->
     verify_live(Live, Vst0),
+    verify_y_init(Vst0),
     if
 	is_integer(Sz) ->
 	    ok;
@@ -709,6 +734,7 @@ valfun_4({bs_init_bits,{f,Fail},Sz,Heap,Live,_,Dst}, Vst0) ->
     set_type_reg(binary, Dst, Vst);
 valfun_4({bs_append,{f,Fail},Bits,Heap,Live,_Unit,Bin,_Flags,Dst}, Vst0) ->
     verify_live(Live, Vst0),
+    verify_y_init(Vst0),
     assert_term(Bits, Vst0),
     assert_term(Bin, Vst0),
     Vst1 = heap_alloc(Heap, Vst0),
@@ -944,6 +970,7 @@ deallocate(#vst{current=St}=Vst) ->
 
 test_heap(Heap, Live, Vst0) ->
     verify_live(Live, Vst0),
+    verify_y_init(Vst0),
     Vst = prune_x_regs(Live, Vst0),
     heap_alloc(Heap, Vst).
 
@@ -1126,6 +1153,7 @@ set_type_y(Type, {y,Y}=Reg, #vst{current=#st{y=Ys0}=St}=Vst)
 	     {value,_} ->
 		 gb_trees:update(Y, Type, Ys0)
 	 end,
+    check_try_catch_tags(Type, Y, Ys0),
     Vst#vst{current=St#st{y=Ys}};
 set_type_y(Type, Reg, #vst{}) -> error({invalid_store,Reg,Type}).
 
@@ -1133,6 +1161,29 @@ set_catch_end({y,Y}, #vst{current=#st{y=Ys0}=St}=Vst) ->
     Ys = gb_trees:update(Y, initialized, Ys0),
     Vst#vst{current=St#st{y=Ys}}.
 
+check_try_catch_tags(Type, LastY, Ys) ->
+    case is_try_catch_tag(Type) of
+        false ->
+            ok;
+        true ->
+            %% Every catch or try/catch must use a lower Y register
+            %% number than any enclosing catch or try/catch. That will
+            %% ensure that when the stack is scanned when an
+            %% exception occurs, the innermost try/catch tag is found
+            %% first.
+            Bad = [{{y,Y},Tag} || {Y,Tag} <- gb_trees:to_list(Ys),
+                                  Y < LastY, is_try_catch_tag(Tag)],
+            case Bad of
+                [] ->
+                    ok;
+                [_|_] ->
+                    error({bad_try_catch_nesting,{y,LastY},Bad})
+            end
+    end.
+
+is_try_catch_tag({catchtag,_}) -> true;
+is_try_catch_tag({trytag,_}) -> true;
+is_try_catch_tag(_) -> false.
 
 is_reg_defined({x,_}=Reg, Vst) -> is_type_defined_x(Reg, Vst);
 is_reg_defined({y,_}=Reg, Vst) -> is_type_defined_y(Reg, Vst);
@@ -1266,6 +1317,7 @@ get_move_term_type(Src, Vst) ->
 	initialized -> error({unassigned,Src});
 	{catchtag,_} -> error({catchtag,Src});
 	{trytag,_} -> error({trytag,Src});
+        tuple_in_progress -> error({tuple_in_progress,Src});
 	Type -> Type
     end.
 
@@ -1274,10 +1326,7 @@ get_move_term_type(Src, Vst) ->
 %%  a standard Erlang type (no catch/try tags or match contexts).
 
 get_term_type(Src, Vst) ->
-    case get_term_type_1(Src, Vst) of
-	initialized -> error({unassigned,Src});
-	{catchtag,_} -> error({catchtag,Src});
-	{trytag,_} -> error({trytag,Src});
+    case get_move_term_type(Src, Vst) of
 	#ms{} -> error({match_context,Src});
 	Type -> Type
     end.
@@ -1324,7 +1373,12 @@ branch_arities([Sz,{f,L}|T], Tuple, #vst{current=St}=Vst0)
     Vst = branch_state(L, Vst1),
     branch_arities(T, Tuple, Vst#vst{current=St}).
 
-branch_state(0, #vst{}=Vst) -> Vst;
+branch_state(0, #vst{}=Vst) ->
+    %% If the instruction fails, the stack may be scanned
+    %% looking for a catch tag. Therefore the Y registers
+    %% must be initialized at this point.
+    verify_y_init(Vst),
+    Vst;
 branch_state(L, #vst{current=St,branched=B}=Vst) ->
     Vst#vst{
       branched=case gb_trees:is_defined(L, B) of
diff --git a/lib/compiler/src/beam_z.erl b/lib/compiler/src/beam_z.erl
index 787e33c142..6c3a6995d7 100644
--- a/lib/compiler/src/beam_z.erl
+++ b/lib/compiler/src/beam_z.erl
@@ -24,22 +24,23 @@
 
 -export([module/2]).
 
--import(lists, [dropwhile/2]).
+-import(lists, [dropwhile/2,map/2]).
 
 -spec module(beam_utils:module_code(), [compile:option()]) ->
                     {'ok',beam_asm:module_code()}.
 
-module({Mod,Exp,Attr,Fs0,Lc}, _Opt) ->
-    Fs = [function(F) || F <- Fs0],
+module({Mod,Exp,Attr,Fs0,Lc}, Opts) ->
+    NoGetHdTl = proplists:get_bool(no_get_hd_tl, Opts),
+    Fs = [function(F, NoGetHdTl) || F <- Fs0],
     {ok,{Mod,Exp,Attr,Fs,Lc}}.
 
-function({function,Name,Arity,CLabel,Is0}) ->
+function({function,Name,Arity,CLabel,Is0}, NoGetHdTl) ->
     try
-	Is = undo_renames(Is0),
+	Is1 = undo_renames(Is0),
+        Is = maybe_eliminate_get_hd_tl(Is1, NoGetHdTl),
 	{function,Name,Arity,CLabel,Is}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -66,6 +67,10 @@ undo_renames([{bif,raise,_,_,_}=I|Is0]) ->
 		      (_) -> true
 		   end, Is0),
     [I|undo_renames(Is)];
+undo_renames([{get_hd,Src,Dst1},{get_tl,Src,Dst2}|Is]) ->
+    [{get_list,Src,Dst1,Dst2}|undo_renames(Is)];
+undo_renames([{get_tl,Src,Dst2},{get_hd,Src,Dst1}|Is]) ->
+    [{get_list,Src,Dst1,Dst2}|undo_renames(Is)];
 undo_renames([I|Is]) ->
     [undo_rename(I)|undo_renames(Is)];
 undo_renames([]) -> [].
@@ -108,3 +113,17 @@ undo_rename({get_map_elements,Fail,Src,{list,List}}) ->
 undo_rename({select,I,Reg,Fail,List}) ->
     {I,Reg,Fail,{list,List}};
 undo_rename(I) -> I.
+
+%%%
+%%% Eliminate get_hd/get_tl instructions if requested by
+%%% the no_get_hd_tl option.
+%%%
+
+maybe_eliminate_get_hd_tl(Is, true) ->
+    map(fun({get_hd,Cons,Hd}) ->
+                {get_list,Cons,Hd,{x,1022}};
+           ({get_tl,Cons,Tl}) ->
+                {get_list,Cons,{x,1022},Tl};
+           (I) -> I
+        end, Is);
+maybe_eliminate_get_hd_tl(Is, false) -> Is.
diff --git a/lib/compiler/src/cerl_clauses.erl b/lib/compiler/src/cerl_clauses.erl
index 7d6518c3c6..fa5104c01b 100644
--- a/lib/compiler/src/cerl_clauses.erl
+++ b/lib/compiler/src/cerl_clauses.erl
@@ -353,6 +353,8 @@ match(P, E, Bs) ->
 	map ->
 	    %% The most we can do is to say "definitely no match" if a
 	    %% map pattern is matched against non-map data.
+            %% (Note: See the document internal_doc/cerl-notes.md for
+            %% information why we don't try to do more here.)
 	    case E of
 		any ->
 		    {false, Bs};
diff --git a/lib/compiler/src/cerl_inline.erl b/lib/compiler/src/cerl_inline.erl
index f5afa75b16..caff47dbcb 100644
--- a/lib/compiler/src/cerl_inline.erl
+++ b/lib/compiler/src/cerl_inline.erl
@@ -1822,6 +1822,14 @@ new_var(Env) ->
     Name = env__new_vname(Env),
     c_var(Name).
 
+%% The way a template variable is used makes it necessary
+%% to make sure that it is unique in the entire function.
+%% Therefore, template variables are atoms with the prefix "@i".
+
+new_template_var(Env) ->
+    Name = env__new_tname(Env),
+    c_var(Name).
+
 residualize_var(R, S) ->
     S1 = count_size(weight(var), S),
     {ref_to_var(R), st__set_var_referenced(R#ref.loc, S1)}.
@@ -2183,7 +2191,7 @@ make_template(E, Vs0, Env0) ->
 	    T = make_data_skel(data_type(E), Ts),
 	    E1 = update_data(E, data_type(E),
 			     [hd(get_ann(T)) || T <- Ts]),
-	    V = new_var(Env1),
+	    V = new_template_var(Env1),
 	    Env2 = env__bind(var_name(V), E1, Env1),
 	    {set_ann(T, [V]), [V | Vs1], Env2};
 	false ->
@@ -2198,7 +2206,7 @@ make_template(E, Vs0, Env0) ->
 		    Env2 = env__bind(V, E1, Env1),
 		    {T, Vs1, Env2};
 		_ ->
-		    V = new_var(Env0),
+		    V = new_template_var(Env0),
 		    Env1 = env__bind(var_name(V), E, Env0),
 		    {set_ann(V, [V]), [V | Vs0], Env1}
 	    end
@@ -2564,6 +2572,11 @@ env__is_defined(Key, Env) ->
 env__new_vname(Env) ->
     rec_env:new_key(Env).
 
+env__new_tname(Env) ->
+    rec_env:new_key(fun(I) ->
+                            list_to_atom("@i"++integer_to_list(I))
+                    end, Env).
+
 env__new_fname(A, N, Env) ->
     rec_env:new_key(fun (X) ->
 			S = integer_to_list(X),
diff --git a/lib/compiler/src/cerl_trees.erl b/lib/compiler/src/cerl_trees.erl
index f30a0b33ac..c7a129b42c 100644
--- a/lib/compiler/src/cerl_trees.erl
+++ b/lib/compiler/src/cerl_trees.erl
@@ -22,7 +22,8 @@
 -module(cerl_trees).
 
 -export([depth/1, fold/3, free_variables/1, get_label/1, label/1, label/2, 
-	 map/2, mapfold/3, mapfold/4, size/1, variables/1]).
+	 map/2, mapfold/3, mapfold/4, next_free_variable_name/1,
+         size/1, variables/1]).
 
 -import(cerl, [alias_pat/1, alias_var/1, ann_c_alias/3, ann_c_apply/3,
 	       ann_c_binary/2, ann_c_bitstr/6, ann_c_call/4,
@@ -507,6 +508,7 @@ mapfold_pairs(_, _, S, []) ->
 %% well-formed Core Erlang syntax tree.
 %%
 %% @see free_variables/1
+%% @see next_free_variable_name/1
 
 -spec variables(cerl:cerl()) -> [cerl:var_name()].
 
@@ -519,6 +521,7 @@ variables(T) ->
 %% @doc Like <code>variables/1</code>, but only includes variables
 %% that are free in the tree.
 %%
+%% @see next_free_variable_name/1
 %% @see variables/1
 
 -spec free_variables(cerl:cerl()) -> [cerl:var_name()].
@@ -678,6 +681,110 @@ var_list_names([V | Vs], A) ->
 var_list_names([], A) ->
     A.
 
+%% ---------------------------------------------------------------------
+
+%% @spec next_free_variable_name(Tree::cerl()) -> var_name()
+%%
+%%	    var_name() = integer()
+%%
+%% @doc Returns a integer variable name higher than any other integer
+%% variable name in the syntax tree. An exception is thrown if
+%% <code>Tree</code> does not represent a well-formed Core Erlang
+%% syntax tree.
+%%
+%% @see variables/1
+%% @see free_variables/1
+
+-spec next_free_variable_name(cerl:cerl()) -> integer().
+
+next_free_variable_name(T) ->
+    1 + next_free(T, -1).
+
+next_free(T, Max) ->
+    case type(T) of
+        literal ->
+            Max;
+        var ->
+            case var_name(T) of
+                Int when is_integer(Int) ->
+                    max(Int, Max);
+                _ ->
+                    Max
+            end;
+        values ->
+            next_free_in_list(values_es(T), Max);
+        cons ->
+            next_free(cons_hd(T), next_free(cons_tl(T), Max));
+        tuple ->
+            next_free_in_list(tuple_es(T), Max);
+        map ->
+            next_free_in_list([map_arg(T)|map_es(T)], Max);
+        map_pair ->
+            next_free_in_list([map_pair_op(T),map_pair_key(T),
+                               map_pair_val(T)], Max);
+        'let' ->
+            Max1 = next_free(let_body(T), Max),
+            Max2 = next_free_in_list(let_vars(T), Max1),
+            next_free(let_arg(T), Max2);
+        seq ->
+            next_free(seq_arg(T),
+                      next_free(seq_body(T), Max));
+        apply ->
+            next_free(apply_op(T),
+                      next_free_in_list(apply_args(T), Max));
+        call ->
+            next_free(call_module(T),
+                      next_free(call_name(T),
+                                next_free_in_list(
+                                  call_args(T), Max)));
+        primop ->
+            next_free_in_list(primop_args(T), Max);
+        'case' ->
+            next_free(case_arg(T),
+                      next_free_in_list(case_clauses(T), Max));
+        clause ->
+            Max1 = next_free(clause_guard(T),
+                             next_free(clause_body(T), Max)),
+            next_free_in_list(clause_pats(T), Max1);
+        alias ->
+            next_free(alias_var(T),
+                      next_free(alias_pat(T), Max));
+        'fun' ->
+            next_free(fun_body(T),
+                      next_free_in_list(fun_vars(T), Max));
+        'receive' ->
+            Max1 = next_free_in_list(receive_clauses(T),
+                                     next_free(receive_timeout(T), Max)),
+            next_free(receive_action(T), Max1);
+        'try' ->
+            Max1 = next_free(try_body(T), Max),
+            Max2 = next_free_in_list(try_vars(T), Max1),
+            Max3 = next_free(try_handler(T), Max2),
+            Max4 = next_free_in_list(try_evars(T), Max3),
+            next_free(try_arg(T), Max4);
+        'catch' ->
+            next_free(catch_body(T), Max);
+        binary ->
+            next_free_in_list(binary_segments(T), Max);
+        bitstr ->
+            next_free(bitstr_val(T), next_free(bitstr_size(T), Max));
+        letrec ->
+            Max1 = next_free_in_defs(letrec_defs(T), Max),
+            Max2 = next_free(letrec_body(T), Max1),
+            next_free_in_list(letrec_vars(T), Max2);
+        module ->
+            next_free_in_defs(module_defs(T), Max)
+    end.
+
+next_free_in_list([H | T], Max) ->
+    next_free_in_list(T, next_free(H, Max));
+next_free_in_list([], Max) ->
+    Max.
+
+next_free_in_defs([{_, Post} | Ds], Max) ->
+    next_free_in_defs(Ds, next_free(Post, Max));
+next_free_in_defs([], Max) ->
+    Max.
 
 %% ---------------------------------------------------------------------
 
diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl
index 1b359d1e59..c6a0056a70 100644
--- a/lib/compiler/src/compile.erl
+++ b/lib/compiler/src/compile.erl
@@ -203,7 +203,12 @@ expand_opts(Opts0) ->
 	       {_,_,undefined} -> [debug_info|Opts0];
 	       {_,_,_} -> Opts0
 	   end,
-    foldr(fun expand_opt/2, [], Opts).
+    %% iff,unless processing is to complex...
+    Opts1 = case proplists:is_defined(makedep_side_effect,Opts) of
+                true -> proplists:delete(makedep,Opts);
+                false -> Opts
+            end,
+    foldr(fun expand_opt/2, [], Opts1).
 
 expand_opt(basic_validation, Os) ->
     [no_code_generation,to_pp,binary|Os];
@@ -214,13 +219,15 @@ expand_opt(report, Os) ->
 expand_opt(return, Os) ->
     [return_errors,return_warnings|Os];
 expand_opt(r16, Os) ->
-    [no_record_opt,no_utf8_atoms|Os];
+    [no_get_hd_tl,no_record_opt,no_utf8_atoms|Os];
 expand_opt(r17, Os) ->
-    [no_record_opt,no_utf8_atoms|Os];
+    [no_get_hd_tl,no_record_opt,no_utf8_atoms|Os];
 expand_opt(r18, Os) ->
-    [no_record_opt,no_utf8_atoms|Os];
+    [no_get_hd_tl,no_record_opt,no_utf8_atoms|Os];
 expand_opt(r19, Os) ->
-    [no_record_opt,no_utf8_atoms|Os];
+    [no_get_hd_tl,no_record_opt,no_utf8_atoms|Os];
+expand_opt(r20, Os) ->
+    [no_get_hd_tl,no_record_opt,no_utf8_atoms|Os];
 expand_opt({debug_info_key,_}=O, Os) ->
     [encrypt_debug_info,O|Os];
 expand_opt(no_float_opt, Os) ->
@@ -674,6 +681,7 @@ select_list_passes_1([], _, Acc) ->
 standard_passes() ->
     [?pass(transform_module),
 
+     {iff,makedep_side_effect,?pass(makedep_and_output)},
      {iff,makedep,[
 	 ?pass(makedep),
 	 {unless,binary,?pass(makedep_output)}
@@ -733,8 +741,6 @@ kernel_passes() ->
      ?pass(v3_kernel),
      {iff,dkern,{listing,"kernel"}},
      {iff,'to_kernel',{done,"kernel"}},
-     {pass,v3_life},
-     {iff,dlife,{listing,"life"}},
      {pass,v3_codegen},
      {iff,dcg,{listing,"codegen"}}
      | asm_passes()].
@@ -771,6 +777,8 @@ asm_passes() ->
 	 {iff,drecv,{listing,"recv"}},
 	 {unless,no_record_opt,{pass,beam_record}},
 	 {iff,drecord,{listing,"record"}},
+         {unless,no_blk2,?pass(block2)},
+	 {iff,dblk2,{listing,"block2"}},
 	 {unless,no_stack_trimming,{pass,beam_trim}},
 	 {iff,dtrim,{listing,"trim"}},
 	 {pass,beam_flatten}]},
@@ -789,8 +797,10 @@ asm_passes() ->
      | binary_passes()].
 
 binary_passes() ->
-    [{native_compile,fun test_native/1,fun native_compile/2},
-     {unless,binary,?pass(save_binary,not_werror)}].
+    [{iff,'to_dis',?pass(to_dis)},
+     {native_compile,fun test_native/1,fun native_compile/2},
+     {unless,binary,?pass(save_binary,not_werror)}
+    ].
 
 %%%
 %%% Compiler passes.
@@ -1128,6 +1138,16 @@ core_lint_module(Code, St) ->
 			      errors=St#compile.errors ++ Es}}
     end.
 
+%% makedep + output and continue
+makedep_and_output(Code0, St) ->
+    {ok,DepCode,St1} = makedep(Code0,St),
+    case makedep_output(DepCode, St1) of
+        {ok,_IgnoreCode,St2} ->
+            {ok,Code0,St2};
+        {error,St2} ->
+            {error,St2}
+    end.
+
 makedep(Code0, #compile{ifile=Ifile,ofile=Ofile,options=Opts}=St) ->
 
     %% Get the target of the Makefile rule.
@@ -1334,6 +1354,10 @@ v3_kernel(Code0, #compile{options=Opts,warnings=Ws0}=St) ->
 	    {ok,Code,St}
     end.
 
+block2(Code0, #compile{options=Opts}=St) ->
+    {ok,Code} = beam_block:module(Code0, [no_blockify|Opts]),
+    {ok,Code,St}.
+
 test_old_inliner(#compile{options=Opts}) ->
     %% The point of this test is to avoid loading the old inliner
     %% if we know that it will not be used.
@@ -1450,16 +1474,16 @@ beam_asm(Code0, #compile{ifile=File,extra_chunks=ExtraChunks,options=CompilerOpt
 	{ok,DebugInfo,Opts0} ->
 	    Opts1 = [O || O <- Opts0, effects_code_generation(O)],
 	    Chunks = [{<<"Dbgi">>, DebugInfo} | ExtraChunks],
-	    CompileInfo = compile_info(File, Opts1),
+	    CompileInfo = compile_info(File, CompilerOpts, Opts1),
 	    {ok,Code} = beam_asm:module(Code0, Chunks, CompileInfo, CompilerOpts),
 	    {ok,Code,St#compile{abstract_code=[]}};
 	{error,Es} ->
 	    {error,St#compile{errors=St#compile.errors ++ [{File,Es}]}}
     end.
 
-compile_info(File, Opts) ->
-    IsSlim = member(slim, Opts),
-    IsDeterministic = member(deterministic, Opts),
+compile_info(File, CompilerOpts, Opts) ->
+    IsSlim = member(slim, CompilerOpts),
+    IsDeterministic = member(deterministic, CompilerOpts),
     Info0 = proplists:get_value(compile_info, Opts, []),
     Info1 =
 	case paranoid_absname(File) of
@@ -1530,15 +1554,14 @@ native_compile_1(Code, St) ->
 		    {error,St#compile{errors=St#compile.errors ++ Es}}
 	    end
     catch
-	Class:R ->
-	    Stk = erlang:get_stacktrace(),
+	Class:R:Stack ->
 	    case IgnoreErrors of
 		true ->
 		    Ws = [{St#compile.ifile,
-			   [{none,?MODULE,{native_crash,R,Stk}}]}],
+			   [{none,?MODULE,{native_crash,R,Stack}}]}],
 		    {ok,St#compile{warnings=St#compile.warnings ++ Ws}};
 		false ->
-		    erlang:raise(Class, R, Stk)
+		    erlang:raise(Class, R, Stack)
 	    end
     end.
 
@@ -1766,6 +1789,21 @@ listing(LFun, Ext, Code, St) ->
 	    {error,St#compile{errors=St#compile.errors ++ Es}}
     end.
 
+to_dis(Code, #compile{module=Module,ofile=Outfile}=St) ->
+    Loaded = code:is_loaded(Module),
+    Sticky = code:is_sticky(Module),
+    _ = [code:unstick_mod(Module) || Sticky],
+
+    {module,Module} = code:load_binary(Module, "", Code),
+    DestDir = filename:dirname(Outfile),
+    DisFile = filename:join(DestDir, atom_to_list(Module) ++ ".dis"),
+    ok = erts_debug:dis_to_file(Module, DisFile),
+
+    %% Restore loaded module
+    _ = [{module, Module} = code:load_file(Module) || Loaded =/= false],
+    [code:stick_mod(Module) || Sticky],
+    {ok,Code,St}.
+
 output_encoding(F, #compile{encoding = none}) ->
     ok = io:setopts(F, [{encoding, epp:default_encoding()}]);
 output_encoding(F, #compile{encoding = Encoding}) ->
@@ -1947,7 +1985,6 @@ pre_load() ->
 	 sys_core_fold,
 	 v3_codegen,
 	 v3_core,
-	 v3_kernel,
-	 v3_life],
+	 v3_kernel],
     _ = code:ensure_modules_loaded(L),
     ok.
diff --git a/lib/compiler/src/compiler.app.src b/lib/compiler/src/compiler.app.src
index 703cf1d1b8..cf32fd251c 100644
--- a/lib/compiler/src/compiler.app.src
+++ b/lib/compiler/src/compiler.app.src
@@ -68,8 +68,7 @@
 	     v3_codegen,
 	     v3_core,
 	     v3_kernel,
-	     v3_kernel_pp,
-	     v3_life
+	     v3_kernel_pp
 	    ]},
   {registered, []},
   {applications, [kernel, stdlib]},
diff --git a/lib/compiler/src/core_lint.erl b/lib/compiler/src/core_lint.erl
index 7d3513c0ba..6e2114be56 100644
--- a/lib/compiler/src/core_lint.erl
+++ b/lib/compiler/src/core_lint.erl
@@ -353,12 +353,6 @@ expr(#c_case{arg=Arg,clauses=Cs}, Def, Rt, St0) ->
     Pc = case_patcount(Cs),
     St1 = body(Arg, Def, Pc, St0),
     clauses(Cs, Def, Pc, Rt, St1);
-expr(#c_receive{clauses=Cs,timeout=#c_literal{val=infinity},
-		action=#c_literal{}},
-     Def, Rt, St) ->
-    %% If the timeout is 'infinity', the after code can never
-    %% be reached. We don't care if the return count is wrong.
-    clauses(Cs, Def, 1, Rt, St);
 expr(#c_receive{clauses=Cs,timeout=T,action=A}, Def, Rt, St0) ->
     St1 = expr(T, Def, 1, St0),
     St2 = body(A, Def, Rt, St1),
diff --git a/lib/compiler/src/core_parse.yrl b/lib/compiler/src/core_parse.yrl
index 79a7cccd98..85444023c6 100644
--- a/lib/compiler/src/core_parse.yrl
+++ b/lib/compiler/src/core_parse.yrl
@@ -496,7 +496,7 @@ make_lit_bin(Acc, [#c_bitstr{val=I0,size=Sz0,unit=U0,type=Type0,flags=F0}|T]) ->
 	    throw(impossible)
     end,
     if
-	Sz =< 8, T =:= [] ->
+	0 =< Sz, Sz =< 8, T =:= [] ->
 	    <<Acc/binary,I:Sz>>;
 	Sz =:= 8 ->
 	    make_lit_bin(<<Acc/binary,I:8>>, T);
diff --git a/lib/compiler/src/genop.tab b/lib/compiler/src/genop.tab
index b5688de339..a47d4e8cf7 100755
--- a/lib/compiler/src/genop.tab
+++ b/lib/compiler/src/genop.tab
@@ -545,3 +545,32 @@ BEAM_FORMAT_NUMBER=0
 ##      Test the arity of Reg and jumps to Lbl if it is not N.
 ##      Test the first element of the tuple and jumps to Lbl if it is not Atom.
 159: is_tagged_tuple/4
+
+# OTP 21
+
+## @spec build_stacktrace
+## @doc  Given the raw stacktrace in x(0), build a cooked stacktrace suitable
+##       for human consumption. Store it in x(0). Destroys all other registers.
+##       Do a garbage collection if necessary to allocate space on the heap
+##       for the result.
+160: build_stacktrace/0
+
+## @spec raw_raise
+## @doc  This instruction works like the erlang:raise/3 BIF, except that the
+##       stacktrace in x(2) must be a raw stacktrace.
+##       x(0) is the class of the exception (error, exit, or throw),
+##       x(1) is the exception term, and x(2) is the raw stackframe.
+##       If x(0) is not a valid class, the instruction will not throw an
+##       exception, but store the atom 'badarg' in x(0) and execute the
+##       next instruction.
+161: raw_raise/0
+
+## @spec get_hd  Source Head
+## @doc  Get the head (or car) part of a list (a cons cell) from Source and
+##       put it into the register Head.
+162: get_hd/2
+
+## @spec get_tl  Source Tail
+## @doc  Get the tail (or cdr) part of a list (a cons cell) from Source and
+##       put it into the register Tail.
+163: get_tl/2
diff --git a/lib/compiler/src/sys_core_alias.erl b/lib/compiler/src/sys_core_alias.erl
index 63e2f7488e..1bce1577d1 100644
--- a/lib/compiler/src/sys_core_alias.erl
+++ b/lib/compiler/src/sys_core_alias.erl
@@ -64,8 +64,7 @@ def({#c_var{name={F,Arity}}=Name,B0}) ->
         erase(new_var_num),
         {Name,B1}
     catch
-        Class:Error ->
-            Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
             io:fwrite("Function: ~w/~w\n", [F,Arity]),
             erlang:raise(Class, Error, Stack)
     end.
diff --git a/lib/compiler/src/sys_core_bsm.erl b/lib/compiler/src/sys_core_bsm.erl
index 3e04cc33df..65580f79e3 100644
--- a/lib/compiler/src/sys_core_bsm.erl
+++ b/lib/compiler/src/sys_core_bsm.erl
@@ -24,7 +24,7 @@
 -export([module/2,format_error/1]).
 
 -include("core_parse.hrl").
--import(lists, [member/2,nth/2,reverse/1,usort/1]).
+-import(lists, [member/2,reverse/1,usort/1]).
 
 -spec module(cerl:c_module(), [compile:option()]) -> {'ok', cerl:c_module()}.
 
@@ -44,8 +44,7 @@ function([{#c_var{name={F,Arity}}=Name,B0}|Fs], FsAcc, Ws0) ->
         {B,Ws} ->
             function(Fs, [{Name,B}|FsAcc], Ws)
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [F,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end;
@@ -60,13 +59,6 @@ format_error(bin_opt_alias) ->
 format_error(bin_partition) ->
     "INFO: matching non-variables after a previous clause matching a variable "
 	"will prevent delayed sub binary optimization";
-format_error(bin_left_var_used_in_guard) ->
-    "INFO: a variable to the left of the binary pattern is used in a guard; "
-	"will prevent delayed sub binary optimization";
-format_error(bin_argument_order) ->
-    "INFO: matching anything else but a plain variable to the left of "
-	"binary pattern will prevent delayed sub binary optimization; "
-	"SUGGEST changing argument order";
 format_error(bin_var_used) ->
     "INFO: using a matched out sub binary will prevent "
 	"delayed sub binary optimization";
@@ -97,46 +89,41 @@ bsm_an(#c_case{arg=#c_values{es=Es}}=Case) ->
 bsm_an(Other) ->
     {ok,Other}.
 
-bsm_an_1(Vs, #c_case{clauses=Cs}=Case) ->
-    case bsm_leftmost(Cs) of
-	none -> {ok,Case};
-	Pos -> bsm_an_2(Vs, Cs, Case, Pos)
-    end.
-
-bsm_an_2(Vs, Cs, Case, Pos) ->
-    case bsm_nonempty(Cs, Pos) of
-	true -> bsm_an_3(Vs, Cs, Case, Pos);
-	false -> {ok,Case}
+bsm_an_1(Vs0, #c_case{clauses=Cs0}=Case) ->
+    case bsm_leftmost(Cs0) of
+	none ->
+            {ok,Case};
+        1 ->
+            bsm_an_2(Vs0, Cs0, Case);
+        Pos ->
+            Vs = move_from_col(Pos, Vs0),
+            Cs = [C#c_clause{pats=move_from_col(Pos, Ps)} ||
+                     #c_clause{pats=Ps}=C <- Cs0],
+            bsm_an_2(Vs, Cs, Case)
     end.
 
-bsm_an_3(Vs, Cs, Case, Pos) ->
+bsm_an_2(Vs, Cs, Case) ->
     try
-	bsm_ensure_no_partition(Cs, Pos),
-	{ok,bsm_do_an(Vs, Pos, Cs, Case)}
+        bsm_ensure_no_partition(Cs),
+        {ok,bsm_do_an(Vs, Cs, Case)}
     catch
-	throw:{problem,Where,What} ->
-	    {ok,Case,{Where,What}}
+        throw:{problem,Where,What} ->
+            {ok,Case,{Where,What}}
     end.
 
-bsm_do_an(Vs0, Pos, Cs0, Case) ->
-    case nth(Pos, Vs0) of
-	#c_var{name=Vname}=V0 ->
-	    Cs = bsm_do_an_var(Vname, Pos, Cs0, []),
-	    V = bsm_annotate_for_reuse(V0),
-	    Bef = lists:sublist(Vs0, Pos-1),
-	    Aft = lists:nthtail(Pos, Vs0),
-	    case Bef ++ [V|Aft] of
-		[_] ->
-		    Case#c_case{arg=V,clauses=Cs};
-		Vs ->
-		    Case#c_case{arg=#c_values{es=Vs},clauses=Cs}
-	    end;
-	_ ->
-	    Case
-    end.
+move_from_col(Pos, L) ->
+    {First,[Col|Rest]} = lists:split(Pos - 1, L),
+    [Col|First] ++ Rest.
 
-bsm_do_an_var(V, S, [#c_clause{pats=Ps,guard=G,body=B0}=C0|Cs], Acc) ->
-    case nth(S, Ps) of
+bsm_do_an([#c_var{name=Vname}=V0|Vs0], Cs0, Case) ->
+    Cs = bsm_do_an_var(Vname, Cs0),
+    V = bsm_annotate_for_reuse(V0),
+    Vs = core_lib:make_values([V|Vs0]),
+    Case#c_case{arg=Vs,clauses=Cs};
+bsm_do_an(_Vs, _Cs, Case) -> Case.
+
+bsm_do_an_var(V, [#c_clause{pats=[P|_],guard=G,body=B0}=C0|Cs]) ->
+    case P of
 	#c_var{name=VarName} ->
 	    case core_lib:is_var_used(V, G) of
 		true -> bsm_problem(C0, orig_bin_var_used_in_guard);
@@ -149,23 +136,23 @@ bsm_do_an_var(V, S, [#c_clause{pats=Ps,guard=G,body=B0}=C0|Cs], Acc) ->
 	    B1 = bsm_maybe_ctx_to_binary(VarName, B0),
 	    B = bsm_maybe_ctx_to_binary(V, B1),
 	    C = C0#c_clause{body=B},
-	    bsm_do_an_var(V, S, Cs, [C|Acc]);
-	#c_alias{}=P ->
+            [C|bsm_do_an_var(V, Cs)];
+        #c_alias{} ->
 	    case bsm_could_match_binary(P) of
 		false ->
-		    bsm_do_an_var(V, S, Cs, [C0|Acc]);
+		    [C0|bsm_do_an_var(V, Cs)];
 		true ->
 		    bsm_problem(C0, bin_opt_alias)
 	    end;
-	P ->
+        _ ->
 	    case bsm_could_match_binary(P) andalso bsm_is_var_used(V, G, B0) of
 		false ->
-		    bsm_do_an_var(V, S, Cs, [C0|Acc]);
+		    [C0|bsm_do_an_var(V, Cs)];
 		true ->
 		    bsm_problem(C0, bin_var_used)
 	    end
     end;
-bsm_do_an_var(_, _, [], Acc) -> reverse(Acc).
+bsm_do_an_var(_, []) -> [].
 
 bsm_annotate_for_reuse(#c_var{anno=Anno}=Var) ->
     Var#c_var{anno=[reuse_for_context|Anno]}.
@@ -193,131 +180,82 @@ previous_ctx_to_binary(V, Core) ->
     end.
 
 %% bsm_leftmost(Cs) -> none | ArgumentNumber
-%%  Find the leftmost argument that does binary matching. Return
-%%  the number of the argument (1-N).
+%%  Find the leftmost argument that matches a nonempty binary.
+%%  Return either 'none' or the argument number (1-N).
 
 bsm_leftmost(Cs) ->
     bsm_leftmost_1(Cs, none).
 
+bsm_leftmost_1([_|_], 1) ->
+    1;
 bsm_leftmost_1([#c_clause{pats=Ps}|Cs], Pos) ->
     bsm_leftmost_2(Ps, Cs, 1, Pos);
 bsm_leftmost_1([], Pos) -> Pos.
 
 bsm_leftmost_2(_, Cs, Pos, Pos) ->
     bsm_leftmost_1(Cs, Pos);
-bsm_leftmost_2([#c_binary{}|_], Cs, N, _) ->
+bsm_leftmost_2([#c_binary{segments=[_|_]}|_], Cs, N, _) ->
     bsm_leftmost_1(Cs, N);
 bsm_leftmost_2([_|Ps], Cs, N, Pos) ->
     bsm_leftmost_2(Ps, Cs, N+1, Pos);
 bsm_leftmost_2([], Cs, _, Pos) ->
     bsm_leftmost_1(Cs, Pos).
 
-%% bsm_nonempty(Cs, Pos) -> true|false
-%%  Check if at least one of the clauses matches a non-empty
-%%  binary in the given argument position.
+%% bsm_ensure_no_partition(Cs) -> ok     (exception if problem)
+%%  There must only be a single bs_start_match2 instruction if we
+%%  are to reuse the binary variable for the match context.
+%%
+%%  To make sure that there is only a single bs_start_match2
+%%  instruction, we will check for partitions such as:
 %%
-bsm_nonempty([#c_clause{pats=Ps}|Cs], Pos) ->
-    case nth(Pos, Ps) of
-	#c_binary{segments=[_|_]} ->
-	    true;
-	_ ->
-	    bsm_nonempty(Cs, Pos)
-    end;
-bsm_nonempty([], _ ) -> false.
-
-%% bsm_ensure_no_partition(Cs, Pos) -> ok     (exception if problem)
-%%  We must make sure that matching is not partitioned between
-%%  variables like this:
 %%             foo(<<...>>) -> ...
 %%             foo(<Variable>) when ... -> ...
-%%             foo(<Any non-variable pattern>) ->
-%%  If there is such partition, we are not allowed to reuse the binary variable
-%%  for the match context.
+%%             foo(<Non-variable pattern>) ->
 %%
-%%  Also, arguments to the left of the argument that is matched
-%%  against a binary, are only allowed to be simple variables, not
-%%  used in guards. The reason is that we must know that the binary is
-%%  only matched in one place (i.e. there must be only one bs_start_match2
-%%  instruction emitted).
+%%  If there is such partition, we reject the optimization.
 
-bsm_ensure_no_partition(Cs, Pos) ->
-    bsm_ensure_no_partition_1(Cs, Pos, before).
+bsm_ensure_no_partition(Cs) ->
+    bsm_ensure_no_partition_1(Cs, before).
 
 %% Loop through each clause.
-bsm_ensure_no_partition_1([#c_clause{pats=Ps,guard=G}|Cs], Pos, State0) ->
-    State = bsm_ensure_no_partition_2(Ps, Pos, G, simple_vars, State0),
+bsm_ensure_no_partition_1([#c_clause{pats=Ps,guard=G}|Cs], State0) ->
+    State = bsm_ensure_no_partition_2(Ps, G, State0),
     case State of
 	'after' ->
-	    bsm_ensure_no_partition_after(Cs, Pos);
+	    bsm_ensure_no_partition_after(Cs);
 	_ ->
 	    ok
     end,
-    bsm_ensure_no_partition_1(Cs, Pos, State);
-bsm_ensure_no_partition_1([], _, _) -> ok.
+    bsm_ensure_no_partition_1(Cs, State);
+bsm_ensure_no_partition_1([], _) -> ok.
 
-%% Loop through each pattern for this clause.
-bsm_ensure_no_partition_2([#c_binary{}=Where|_], 1, _, Vstate, State) ->
-    case State of
-	before when Vstate =:= simple_vars -> within;
-	before -> bsm_problem(Where, Vstate);
-	within when Vstate =:= simple_vars -> within;
-	within -> bsm_problem(Where, Vstate)
-    end;
-bsm_ensure_no_partition_2([#c_alias{}=Alias|_], 1, N, Vstate, State) ->
+bsm_ensure_no_partition_2([#c_binary{}|_], _, _State) ->
+    within;
+bsm_ensure_no_partition_2([#c_alias{}=Alias|_], N, State) ->
     %% Retrieve the real pattern that the alias refers to and check that.
     P = bsm_real_pattern(Alias),
-    bsm_ensure_no_partition_2([P], 1, N, Vstate, State);
-bsm_ensure_no_partition_2([_|_], 1, _, _Vstate, before=State) ->
+    bsm_ensure_no_partition_2([P], N, State);
+bsm_ensure_no_partition_2([_|_], _, before=State) ->
     %% No binary matching yet - therefore no partition.
     State;
-bsm_ensure_no_partition_2([P|_], 1, _, Vstate, State) ->
+bsm_ensure_no_partition_2([P|_], _, State) ->
     case bsm_could_match_binary(P) of
 	false ->
-	    %% If clauses can be freely arranged (Vstate =:= simple_vars),
-	    %% a clause that cannot match a binary will not partition the clause.
-	    %% Example:
-	    %%
-	    %% a(Var, <<>>) -> ...
-	    %% a(Var, []) -> ...
-	    %% a(Var, <<B>>) -> ...
-	    %%
-	    %% But if the clauses can't be freely rearranged, as in
-	    %%
-	    %% b(Var, <<X>>) -> ...
-	    %% b(1, 2) -> ...
-	    %%
-	    %% we do have a problem.
-	    %%
-	    case Vstate of
-		simple_vars -> State;
-		_ -> bsm_problem(P, Vstate)
-	    end;
+            State;
 	true ->
 	    %% The pattern P *may* match a binary, so we must update the state.
 	    %% (P must be a variable.)
-	    case State of
-		within -> 'after';
-		'after' -> 'after'
-	    end
-    end;
-bsm_ensure_no_partition_2([#c_var{name=V}|Ps], N, G, Vstate, S) ->
-    case core_lib:is_var_used(V, G) of
-	false ->
-	    bsm_ensure_no_partition_2(Ps, N-1, G, Vstate, S);
-	true ->
-	    bsm_ensure_no_partition_2(Ps, N-1, G, bin_left_var_used_in_guard, S)
-    end;
-bsm_ensure_no_partition_2([_|Ps], N, G, _, S) ->
-    bsm_ensure_no_partition_2(Ps, N-1, G, bin_argument_order, S).
+            'after'
+    end.
 
-bsm_ensure_no_partition_after([#c_clause{pats=Ps}=C|Cs], Pos) ->
-    case nth(Pos, Ps) of
-	#c_var{} ->
-	    bsm_ensure_no_partition_after(Cs, Pos);
-	_ ->
-	    bsm_problem(C, bin_partition)
+bsm_ensure_no_partition_after([#c_clause{pats=Ps}=C|Cs]) ->
+    case Ps of
+        [#c_var{}|_] ->
+            bsm_ensure_no_partition_after(Cs);
+        _ ->
+            bsm_problem(C, bin_partition)
     end;
-bsm_ensure_no_partition_after([], _) -> ok.
+bsm_ensure_no_partition_after([]) -> ok.
 
 bsm_could_match_binary(#c_alias{pat=P}) -> bsm_could_match_binary(P);
 bsm_could_match_binary(#c_cons{}) -> false;
diff --git a/lib/compiler/src/sys_core_dsetel.erl b/lib/compiler/src/sys_core_dsetel.erl
index bd3eeae238..9e2df69b33 100644
--- a/lib/compiler/src/sys_core_dsetel.erl
+++ b/lib/compiler/src/sys_core_dsetel.erl
@@ -81,8 +81,7 @@ visit_module_1([{Name,F0}|Fs], Env, Acc) ->
 	{F,_} ->
 	    visit_module_1(Fs, Env, [{Name,F}|Acc])
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    #c_var{name={Func,Arity}} = Name,
 	    io:fwrite("Function: ~w/~w\n", [Func,Arity]),
 	    erlang:raise(Class, Error, Stack)
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl
index df880ff784..395b6bd677 100644
--- a/lib/compiler/src/sys_core_fold.erl
+++ b/lib/compiler/src/sys_core_fold.erl
@@ -108,25 +108,36 @@
 
 module(#c_module{defs=Ds0}=Mod, Opts) ->
     put(no_inline_list_funcs, not member(inline_list_funcs, Opts)),
-    case get(new_var_num) of
-	undefined -> put(new_var_num, 0);
-	_ -> ok
-    end,
     init_warnings(),
     Ds1 = [function_1(D) || D <- Ds0],
+    erase(new_var_num),
     erase(no_inline_list_funcs),
     {ok,Mod#c_module{defs=Ds1},get_warnings()}.
 
 function_1({#c_var{name={F,Arity}}=Name,B0}) ->
+    %% Find a suitable starting value for the variable counter. Note
+    %% that this pass assumes that new_var_name/1 returns a variable
+    %% name distinct from any variable used in the entire body of
+    %% the function. We use integers as variable names to avoid
+    %% filling up the atom table when compiling huge functions.
+    Count = cerl_trees:next_free_variable_name(B0),
+    put(new_var_num, Count),
     try
+        %% Find a suitable starting value for the variable
+        %% counter. Note that this pass assumes that new_var_name/1
+        %% returns a variable name distinct from any variable used in
+        %% the entire body of the function. We use integers as
+        %% variable names to avoid filling up the atom table when
+        %% compiling huge functions.
+        Count = cerl_trees:next_free_variable_name(B0),
+        put(new_var_num, Count),
 	B = find_fixpoint(fun(Core) ->
 				  %% This must be a fun!
 				  expr(Core, value, sub_new())
 			  end, B0, 20),
 	{Name,B}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [F,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
@@ -146,14 +157,9 @@ find_fixpoint(OptFun, Core0, Max) ->
 body(Body, Sub) ->
     body(Body, value, Sub).
 
-body(#c_values{anno=A,es=Es0}, Ctxt, Sub) ->
-    Es1 = expr_list(Es0, Ctxt, Sub),
-    case Ctxt of
-	value ->
-	    #c_values{anno=A,es=Es1};
-	effect ->
-	    make_effect_seq(Es1, Sub)
-    end;
+body(#c_values{anno=A,es=Es0}, value, Sub) ->
+    Es1 = expr_list(Es0, value, Sub),
+    #c_values{anno=A,es=Es1};
 body(E, Ctxt, Sub) ->
     ?ASSERT(verify_scope(E, Sub)),
     expr(E, Ctxt, Sub).
@@ -314,9 +320,15 @@ expr(#c_seq{arg=Arg0,body=B0}=Seq0, Ctxt, Sub) ->
 	false ->
 	    %% Arg cannot be "values" here - only a single value
 	    %% make sense here.
-	    case is_safe_simple(Arg, Sub) of
-		true -> B1;
-		false -> Seq0#c_seq{arg=Arg,body=B1}
+            case {Ctxt,is_safe_simple(Arg, Sub)} of
+                {effect,true} -> B1;
+                {effect,false} ->
+                    case is_safe_simple(B1, Sub) of
+                        true -> Arg;
+                        false -> Seq0#c_seq{arg=Arg,body=B1}
+                    end;
+                {value,true} -> B1;
+                {value,false} -> Seq0#c_seq{arg=Arg,body=B1}
 	    end
     end;
 expr(#c_let{}=Let0, Ctxt, Sub) ->
@@ -380,10 +392,7 @@ expr(#c_case{}=Case0, Ctxt, Sub) ->
 	    Case = Case1#c_case{arg=Arg2,clauses=Cs2},
 	    warn_no_clause_match(Case1, Case),
 	    Expr = eval_case(Case, Sub),
-            case move_case_into_arg(Case, Sub) of
-                impossible -> Expr;
-                Other -> Other
-            end;
+            move_case_into_arg(Expr, Sub);
 	Other ->
 	    expr(Other, Ctxt, Sub)
     end;
@@ -415,6 +424,8 @@ expr(#c_call{module=M0,name=N0}=Call0, Ctxt, Sub) ->
 	no -> call(Call, M1, N1, Sub);
 	{yes,Seq} -> expr(Seq, Ctxt, Sub)
     end;
+expr(#c_primop{name=#c_literal{val=build_stacktrace}}, effect, _Sub) ->
+    void();
 expr(#c_primop{args=As0}=Prim, _, Sub) ->
     As1 = expr_list(As0, value, Sub),
     Prim#c_primop{args=As1};
@@ -2155,7 +2166,7 @@ make_var(A) ->
 make_var_name() ->
     N = get(new_var_num),
     put(new_var_num, N+1),
-    list_to_atom("@f"++integer_to_list(N)).
+    N.
 
 letify(Bs, Body) ->
     Ann = cerl:get_ann(Body),
@@ -2508,6 +2519,72 @@ are_all_failing_clauses(Cs) ->
 is_failing_clause(#c_clause{body=B}) ->
     will_fail(B).
 
+%% opt_build_stacktrace(Let) -> Core.
+%%  If the stacktrace is *only* used in a call to erlang:raise/3,
+%%  there is no need to build a cooked stackframe using build_stacktrace/1.
+
+opt_build_stacktrace(#c_let{vars=[#c_var{name=Cooked}],
+                            arg=#c_primop{name=#c_literal{val=build_stacktrace},
+                                          args=[RawStk]},
+                            body=Body}=Let) ->
+    case Body of
+        #c_call{module=#c_literal{val=erlang},
+                name=#c_literal{val=raise},
+                args=[Class,Exp,#c_var{name=Cooked}]} ->
+            %% The stacktrace is only used in a call to erlang:raise/3.
+            %% There is no need to build the stacktrace. Replace the
+            %% call to erlang:raise/3 with the the raw_raise/3 instruction,
+            %% which will use a raw stacktrace.
+            #c_primop{name=#c_literal{val=raw_raise},
+                      args=[Class,Exp,RawStk]};
+        #c_let{vars=[#c_var{name=V}],arg=Arg,body=B0} when V =/= Cooked ->
+            case core_lib:is_var_used(Cooked, Arg) of
+                false ->
+                    %% The built stacktrace is not used in the argument,
+                    %% so we can sink the building of the stacktrace into
+                    %% the body of the let.
+                    B = opt_build_stacktrace(Let#c_let{body=B0}),
+                    Body#c_let{body=B};
+                true ->
+                    Let
+            end;
+        #c_seq{arg=Arg,body=B0} ->
+            case core_lib:is_var_used(Cooked, Arg) of
+                false ->
+                    %% The built stacktrace is not used in the argument,
+                    %% so we can sink the building of the stacktrace into
+                    %% the body of the sequence.
+                    B = opt_build_stacktrace(Let#c_let{body=B0}),
+                    Body#c_seq{body=B};
+                true ->
+                    Let
+            end;
+        #c_case{arg=Arg,clauses=Cs0} ->
+            case core_lib:is_var_used(Cooked, Arg) orelse
+                is_used_in_any_guard(Cooked, Cs0) of
+                false ->
+                    %% The built stacktrace is not used in the argument,
+                    %% so we can sink the building of the stacktrace into
+                    %% each arm of the case.
+                    Cs = [begin
+                              B = opt_build_stacktrace(Let#c_let{body=B0}),
+                              C#c_clause{body=B}
+                          end || #c_clause{body=B0}=C <- Cs0],
+                    Body#c_case{clauses=Cs};
+                true ->
+                    Let
+            end;
+        _ ->
+            Let
+    end;
+opt_build_stacktrace(Expr) ->
+    Expr.
+
+is_used_in_any_guard(V, Cs) ->
+    any(fun(#c_clause{guard=G}) ->
+                core_lib:is_var_used(V, G)
+        end, Cs).
+
 %% opt_case_in_let(Let) -> Let'
 %%  Try to avoid building tuples that are immediately matched.
 %%  A common pattern is:
@@ -2622,9 +2699,13 @@ delay_build_expr_1(#c_receive{clauses=Cs0,
 			      timeout=Timeout,
 			      action=A0}=Rec, TypeSig) ->
     Cs = delay_build_cs(Cs0, TypeSig),
-    A = case Timeout of
-	    #c_literal{val=infinity} -> A0;
-	    _ -> delay_build_expr(A0, TypeSig)
+    A = case {Timeout,A0} of
+	    {#c_literal{val=infinity},#c_literal{}} ->
+                {_Type,Arity} = TypeSig,
+                Es = lists:duplicate(Arity, A0),
+                core_lib:make_values(Es);
+	    _ ->
+                delay_build_expr(A0, TypeSig)
 	end,
     Rec#c_receive{clauses=Cs,action=A};
 delay_build_expr_1(#c_seq{body=B0}=Seq, TypeSig) ->
@@ -2659,53 +2740,94 @@ opt_simple_let_1(#c_let{vars=Vs0,body=B0}=Let, Arg0, Ctxt, Sub0) ->
     %% Optimise let and add new substitutions.
     {Vs,Args,Sub1} = let_substs(Vs0, Arg0, Sub0),
     BodySub = update_let_types(Vs, Args, Sub1),
+    Sub = Sub1#sub{v=[],s=cerl_sets:new()},
     B = body(B0, Ctxt, BodySub),
     Arg = core_lib:make_values(Args),
-    opt_simple_let_2(Let, Vs, Arg, B, B0, Ctxt, Sub1).
+    opt_simple_let_2(Let, Vs, Arg, B, B0, Sub).
+
+
+%% opt_simple_let_2(Let0, Vs0, Arg0, Body, PrevBody, Ctxt, Sub) -> Core.
+%%  Do final simplifications of the let.
+%%
+%%  Note that the substitutions and scope in Sub have been cleared
+%%  and should not be used.
 
-opt_simple_let_2(Let0, Vs0, Arg0, Body, PrevBody, Ctxt, Sub) ->
+opt_simple_let_2(Let0, Vs0, Arg0, Body, PrevBody, Sub) ->
     case {Vs0,Arg0,Body} of
-	{[#c_var{name=N1}],Arg1,#c_var{name=N2}} ->
-	    case N1 =:= N2 of
-		true ->
-		    %% let <Var> = Arg in <Var>  ==>  Arg
-		    Arg1;
-		false ->
-		    %% let <Var> = Arg in <OtherVar>  ==>  seq Arg OtherVar
-		    Arg = maybe_suppress_warnings(Arg1, Vs0, PrevBody),
-		    #c_seq{arg=Arg,body=Body}
-	    end;
+	{[#c_var{name=V}],Arg1,#c_var{name=V}} ->
+            %% let <Var> = Arg in <Var>  ==>  Arg
+            Arg1;
 	{[],#c_values{es=[]},_} ->
 	    %% No variables left.
 	    Body;
-	{Vs,Arg1,#c_literal{}} ->
-	    Arg = maybe_suppress_warnings(Arg1, Vs, PrevBody),
-	    case Ctxt of
-		effect ->
-		    %% Throw away the literal body.
-		    Arg;
-		value ->
-		    %% Since the variable is not used in the body, we
-		    %% can rewrite the let to a sequence.
-		    %%  let <Var> = Arg in Literal ==> seq Arg Literal
-		    #c_seq{arg=Arg,body=Body}
-	    end;
-	{Vs,Arg1,Body} ->
-	    %% If none of the variables are used in the body, we can
-	    %% rewrite the let to a sequence:
-	    %%    let <Var> = Arg in BodyWithoutVar ==>
-	    %%        seq Arg BodyWithoutVar
-	    case is_any_var_used(Vs, Body) of
-		false ->
-		    Arg = maybe_suppress_warnings(Arg1, Vs, PrevBody),
-		    #c_seq{arg=Arg,body=Body};
-		true ->
-		    Let1 = Let0#c_let{vars=Vs,arg=Arg1,body=Body},
-		    opt_bool_case_in_let(Let1, Sub)
+	{[#c_var{name=V}=Var|Vars]=Vars0,Arg1,Body} ->
+            case core_lib:is_var_used(V, Body) of
+                false when Vars =:= [] ->
+                    %% If the variable is not used in the body, we can
+                    %% rewrite the let to a sequence:
+                    %%    let <Var> = Arg in BodyWithoutVar ==>
+                    %%        seq Arg BodyWithoutVar
+                    Arg = maybe_suppress_warnings(Arg1, Var, PrevBody),
+                    #c_seq{arg=Arg,body=Body};
+                false ->
+                    %% There are multiple values returned by the argument
+                    %% and the first value is not used (this is a 'case'
+                    %% with exported variables, but the return value is
+                    %% ignored). We can remove the first variable and the
+                    %% the first value returned from the 'let' argument.
+                    Arg2 = remove_first_value(Arg1, Sub),
+                    Let1 = Let0#c_let{vars=Vars,arg=Arg2,body=Body},
+                    post_opt_let(Let1, Sub);
+                true ->
+                    Let1 = Let0#c_let{vars=Vars0,arg=Arg1,body=Body},
+                    post_opt_let(Let1, Sub)
 	    end
     end.
 
-%% maybe_suppress_warnings(Arg, [#c_var{}], PreviousBody) -> Arg'
+%% post_opt_let(Let, Sub)
+%%  Final optimizations of the let.
+%%
+%%  Note that the substitutions and scope in Sub have been cleared
+%%  and should not be used.
+
+post_opt_let(Let0, Sub) ->
+    Let1 = opt_bool_case_in_let(Let0, Sub),
+    opt_build_stacktrace(Let1).
+
+
+%% remove_first_value(Core0, Sub) -> Core.
+%%  Core0 is an expression that returns at least two values.
+%%  Remove the first value returned from Core0.
+
+remove_first_value(#c_values{es=[V|Vs]}, Sub) ->
+    Values = core_lib:make_values(Vs),
+    case is_safe_simple(V, Sub) of
+        false ->
+            #c_seq{arg=V,body=Values};
+        true ->
+            Values
+    end;
+remove_first_value(#c_case{clauses=Cs0}=Core, Sub) ->
+    Cs = remove_first_value_cs(Cs0, Sub),
+    Core#c_case{clauses=Cs};
+remove_first_value(#c_receive{clauses=Cs0,action=Act0}=Core, Sub) ->
+    Cs = remove_first_value_cs(Cs0, Sub),
+    Act = remove_first_value(Act0, Sub),
+    Core#c_receive{clauses=Cs,action=Act};
+remove_first_value(#c_let{body=B}=Core, Sub) ->
+    Core#c_let{body=remove_first_value(B, Sub)};
+remove_first_value(#c_seq{body=B}=Core, Sub) ->
+    Core#c_seq{body=remove_first_value(B, Sub)};
+remove_first_value(#c_primop{}=Core, _Sub) ->
+    Core;
+remove_first_value(#c_call{}=Core, _Sub) ->
+    Core.
+
+remove_first_value_cs(Cs, Sub) ->
+    [C#c_clause{body=remove_first_value(B, Sub)} ||
+        #c_clause{body=B}=C <- Cs].
+
+%% maybe_suppress_warnings(Arg, #c_var{}, PreviousBody) -> Arg'
 %%  Try to suppress false warnings when a variable is not used.
 %%  For instance, we don't expect a warning for useless building in:
 %%
@@ -2716,12 +2838,12 @@ opt_simple_let_2(Let0, Vs0, Arg0, Body, PrevBody, Ctxt, Sub) ->
 %%  referenced in the original unoptimized code. If they were, we will
 %%  consider the warning false and suppress it.
 
-maybe_suppress_warnings(Arg, Vs, PrevBody) ->
+maybe_suppress_warnings(Arg, #c_var{name=V}, PrevBody) ->
     case should_suppress_warning(Arg) of
 	true ->
 	    Arg;				%Already suppressed.
 	false ->
-	    case is_any_var_used(Vs, PrevBody) of
+	    case core_lib:is_var_used(V, PrevBody) of
 		true ->
 		    suppress_warning([Arg]);
 		false ->
@@ -2810,7 +2932,7 @@ move_case_into_arg(#c_case{arg=#c_case{arg=OuterArg,
 	    Outer#c_case{arg=OuterArg,
 			 clauses=[OuterCa,OuterCb]};
         false ->
-            impossible
+            Inner0
     end;
 move_case_into_arg(#c_case{arg=#c_seq{arg=OuterArg,body=InnerArg}=Outer,
                            clauses=InnerClauses}=Inner, _Sub) ->
@@ -2826,15 +2948,8 @@ move_case_into_arg(#c_case{arg=#c_seq{arg=OuterArg,body=InnerArg}=Outer,
     %%
     Outer#c_seq{arg=OuterArg,
                 body=Inner#c_case{arg=InnerArg,clauses=InnerClauses}};
-move_case_into_arg(_, _) ->
-    impossible.
-
-is_any_var_used([#c_var{name=V}|Vs], Expr) ->
-    case core_lib:is_var_used(V, Expr) of
-	false -> is_any_var_used(Vs, Expr);
-	true -> true
-    end;
-is_any_var_used([], _) -> false.
+move_case_into_arg(Expr, _) ->
+    Expr.
 
 %%%
 %%% Retrieving information about types.
diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl
index e705aefb96..8808c0a3b7 100644
--- a/lib/compiler/src/v3_codegen.erl
+++ b/lib/compiler/src/v3_codegen.erl
@@ -19,25 +19,6 @@
 %%
 %% Purpose : Code generator for Beam.
 
-%% The following assumptions have been made:
-%%
-%% 1. Matches, i.e. things with {match,M,Ret} wrappers, only return
-%% values; no variables are exported. If the match would have returned
-%% extra variables then these have been transformed to multiple return
-%% values.
-%% 
-%% 2. All BIF's called in guards are gc-safe so there is no need to
-%% put thing on the stack in the guard.  While this would in principle
-%% work it would be difficult to keep track of the stack depth when
-%% trimming.
-%%
-%% The code generation uses variable lifetime information added by
-%% the v3_life module to save variables, allocate registers and 
-%% move registers to the stack when necessary.
-%%
-%% We try to use a consistent variable name scheme throughout.  The
-%% StackReg record is always called Bef,Int<n>,Aft.
-
 -module(v3_codegen).
 
 %% The main interface.
@@ -45,12 +26,14 @@
 
 -import(lists, [member/2,keymember/3,keysort/2,keydelete/3,
 		append/1,flatmap/2,filter/2,foldl/3,foldr/3,mapfoldl/3,
-		sort/1,reverse/1,reverse/2]).
--import(v3_life, [vdb_find/2]).
+		sort/1,reverse/1,reverse/2,map/2]).
+-import(ordsets, [add_element/2,intersection/2,union/2]).
 
-%%-compile([export_all]).
+-include("v3_kernel.hrl").
 
--include("v3_life.hrl").
+%% These are not defined in v3_kernel.hrl.
+get_kanno(Kthing) -> element(2, Kthing).
+set_kanno(Kthing, Anno) -> setelement(2, Kthing, Anno).
 
 %% Main codegen structure.
 -record(cg, {lcount=1,				%Label counter
@@ -61,38 +44,400 @@
 	     functable=#{},	                %Map of local functions: {Name,Arity}=>Label
 	     in_catch=false,			%Inside a catch or not.
 	     need_frame,			%Need a stack frame.
-	     ultimate_failure			%Label for ultimate match failure.
-	    }).			
+	     ultimate_failure,			%Label for ultimate match failure.
+             ctx                                %Match context.
+	    }).
 
 %% Stack/register state record.
 -record(sr, {reg=[],				%Register table
 	     stk=[],				%Stack table
-	     res=[]}).				%Reserved regs: [{reserved,I,V}]
+	     res=[]}).				%Registers to reserve
+
+%% Internal records.
+-record(cg_need_heap, {anno=[] :: term(),
+                       h=0 :: integer()}).
+-record(cg_block, {anno=[] :: term(),
+                   es=[] :: [term()]}).
 
--type life_module() :: {module(),_,_,[_]}.
+-type vdb_entry() :: {atom(),non_neg_integer(),non_neg_integer()}.
 
--spec module(life_module(), [compile:option()]) -> {'ok',beam_asm:module_code()}.
+-record(l, {i=0 :: non_neg_integer(),           %Op number
+	    vdb=[] :: [vdb_entry()],            %Variable database
+	    a=[] :: [term()]}).                 %Core annotation
 
-module({Mod,Exp,Attr,Forms}, _Options) ->
-    {Fs,St} = functions(Forms, {atom,Mod}),
-    {ok,{Mod,Exp,Attr,Fs,St#cg.lcount}}.
+-spec module(#k_mdef{}, [compile:option()]) -> {'ok',beam_asm:module_code()}.
+
+module(#k_mdef{name=Mod,exports=Es,attributes=Attr,body=Forms}, _Opts) ->
+    {Asm,St} = functions(Forms, {atom,Mod}),
+    {ok,{Mod,Es,Attr,Asm,St#cg.lcount}}.
 
 functions(Forms, AtomMod) ->
     mapfoldl(fun (F, St) -> function(F, AtomMod, St) end, #cg{lcount=1}, Forms).
 
-function({function,Name,Arity,Asm0,Vb,Vdb,Anno}, AtomMod, St0) ->
+function(#k_fdef{anno=#k{a=Anno},func=Name,arity=Arity,
+                 vars=As,body=Kb}, AtomMod, St0) ->
+    try
+        #k_match{} = Kb,                   %Assertion.
+
+        %% Try to suppress the stack frame unless it is
+        %% really needed.
+        Body0 = avoid_stack_frame(Kb),
+
+        %% Annotate kernel records with variable usage.
+        Vdb0 = init_vars(As),
+        {Body,_,Vdb} = body(Body0, 1, Vdb0),
+
+        %% Generate the BEAM assembly code.
+        {Asm,EntryLabel,St} = cg_fun(Body, As, Vdb, AtomMod,
+                                     {Name,Arity}, Anno, St0),
+        Func = {function,Name,Arity,EntryLabel,Asm},
+        {Func,St}
+    catch
+        Class:Error:Stack ->
+            io:fwrite("Function: ~w/~w\n", [Name,Arity]),
+            erlang:raise(Class, Error, Stack)
+    end.
+
+
+%% avoid_stack_frame(Kernel) -> Kernel'
+%%  If possible, avoid setting up a stack frame. Functions
+%%  that only do matching, calls to guard BIFs, and tail-recursive
+%%  calls don't need a stack frame.
+
+avoid_stack_frame(#k_match{body=Body}=M) ->
     try
-	{Asm,EntryLabel,St} = cg_fun(Vb, Asm0, Vdb, AtomMod,
-				     {Name,Arity}, Anno, St0),
-	Func = {function,Name,Arity,EntryLabel,Asm},
-	{Func,St}
+        M#k_match{body=avoid_stack_frame_1(Body)}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
-	    io:fwrite("Function: ~w/~w\n", [Name,Arity]),
-	    erlang:raise(Class, Error, Stack)
+        impossible ->
+            M
     end.
 
+avoid_stack_frame_1(#k_alt{first=First0,then=Then0}=Alt) ->
+    First = avoid_stack_frame_1(First0),
+    Then = avoid_stack_frame_1(Then0),
+    Alt#k_alt{first=First,then=Then};
+avoid_stack_frame_1(#k_bif{op=Op}=Bif) ->
+    case Op of
+        #k_internal{} ->
+            %% Most internal BIFs clobber the X registers.
+            throw(impossible);
+        _ ->
+            Bif
+    end;
+avoid_stack_frame_1(#k_break{anno=Anno,args=Args}) ->
+    #k_guard_break{anno=Anno,args=Args};
+avoid_stack_frame_1(#k_guard_break{}=Break) ->
+    Break;
+avoid_stack_frame_1(#k_enter{}=Enter) ->
+    %% Tail-recursive calls don't need a stack frame.
+    Enter;
+avoid_stack_frame_1(#k_guard{clauses=Cs0}=Guard) ->
+    Cs = avoid_stack_frame_list(Cs0),
+    Guard#k_guard{clauses=Cs};
+avoid_stack_frame_1(#k_guard_clause{guard=G0,body=B0}=C) ->
+    G = avoid_stack_frame_1(G0),
+    B = avoid_stack_frame_1(B0),
+    C#k_guard_clause{guard=G,body=B};
+avoid_stack_frame_1(#k_match{anno=A,vars=Vs,body=B0,ret=Ret}) ->
+    %% Use #k_guard_match{} instead to avoid saving the X registers
+    %% to the stack before matching.
+    B = avoid_stack_frame_1(B0),
+    #k_guard_match{anno=A,vars=Vs,body=B,ret=Ret};
+avoid_stack_frame_1(#k_guard_match{body=B0}=M) ->
+    B = avoid_stack_frame_1(B0),
+    M#k_guard_match{body=B};
+avoid_stack_frame_1(#k_protected{arg=Arg0}=Prot) ->
+    Arg = avoid_stack_frame_1(Arg0),
+    Prot#k_protected{arg=Arg};
+avoid_stack_frame_1(#k_put{}=Put) ->
+    Put;
+avoid_stack_frame_1(#k_return{}=Ret) ->
+    Ret;
+avoid_stack_frame_1(#k_select{var=#k_var{anno=Vanno},types=Types0}=Select) ->
+    case member(reuse_for_context, Vanno) of
+        false ->
+            Types = avoid_stack_frame_list(Types0),
+            Select#k_select{types=Types};
+        true ->
+            %% Including binary patterns that overwrite the register containing
+            %% the binary with the match context may not be safe. For example,
+            %% bs_match_SUITE:bin_tail_e/1 with inlining will be rejected by
+            %% beam_validator.
+            %%
+            %% Essentially the following code is produced:
+            %%
+            %% bs_match {x,0} => {x,0}
+            %% ...
+            %% bs_match {x,0} => {x,1}  %% ILLEGAL
+            %%
+            %% A bs_match instruction will only accept a match context as the
+            %% source operand if the source and destination registers are the
+            %% the same (as in the first bs_match instruction above).
+            %% The second bs_match instruction is therefore illegal.
+            %%
+            %% This situation is avoided if there is a stack frame:
+            %%
+            %% move {x,0} => {y,0}
+            %% bs_match {x,0} => {x,0}
+            %% ...
+            %% bs_match {y,0} => {x,1}  %% LEGAL
+            %%
+            throw(impossible)
+    end;
+avoid_stack_frame_1(#k_seq{arg=#k_call{anno=Anno,op=Op}=Call,
+                           body=#k_break{args=BrArgs0}}=Seq) ->
+    case Op of
+        #k_remote{mod=#k_atom{val=Mod},
+                  name=#k_atom{val=Name},
+                  arity=Arity} ->
+            case erl_bifs:is_exit_bif(Mod, Name, Arity) of
+                false ->
+                    %% Will clobber X registers. Must have a stack frame.
+                    throw(impossible);
+                true ->
+                    %% The call to this BIF will never return. It is safe
+                    %% to suppress the stack frame.
+                    Bif = #k_bif{anno=Anno,
+                                 op=#k_internal{name=guard_error,arity=1},
+                                 args=[Call],ret=[]},
+                    BrArgs = lists:duplicate(length(BrArgs0), #k_nil{}),
+                    GB = #k_guard_break{anno=#k{us=[],ns=[],a=[]},args=BrArgs},
+                    Seq#k_seq{arg=Bif,body=GB}
+            end;
+        _ ->
+            %% Will clobber X registers. Must have a stack frame.
+            throw(impossible)
+    end;
+avoid_stack_frame_1(#k_seq{arg=A0,body=B0}=Seq) ->
+    A = avoid_stack_frame_1(A0),
+    B = avoid_stack_frame_1(B0),
+    Seq#k_seq{arg=A,body=B};
+avoid_stack_frame_1(#k_test{}=Test) ->
+    Test;
+avoid_stack_frame_1(#k_type_clause{values=Values0}=TC) ->
+    Values = avoid_stack_frame_list(Values0),
+    TC#k_type_clause{values=Values};
+avoid_stack_frame_1(#k_val_clause{body=B0}=VC) ->
+    B = avoid_stack_frame_1(B0),
+    VC#k_val_clause{body=B};
+avoid_stack_frame_1(_Body) ->
+    throw(impossible).
+
+avoid_stack_frame_list([H|T]) ->
+    [avoid_stack_frame_1(H)|avoid_stack_frame_list(T)];
+avoid_stack_frame_list([]) -> [].
+
+
+%% This pass creates beam format annotated with variable lifetime
+%% information.  Each thing is given an index and for each variable we
+%% store the first and last index for its occurrence.  The variable
+%% database, VDB, attached to each thing is only relevant internally
+%% for that thing.
+%%
+%% For nested things like matches the numbering continues locally and
+%% the VDB for that thing refers to the variable usage within that
+%% thing.  Variables which live through a such a thing are internally
+%% given a very large last index.  Internally the indexes continue
+%% after the index of that thing.  This creates no problems as the
+%% internal variable info never escapes and externally we only see
+%% variable which are alive both before or after.
+%%
+%% This means that variables never "escape" from a thing and the only
+%% way to get values from a thing is to "return" them, with 'break' or
+%% 'return'.  Externally these values become the return values of the
+%% thing.  This is no real limitation as most nested things have
+%% multiple threads so working out a common best variable usage is
+%% difficult.
+
+%% body(Kbody, I, Vdb) -> {[Expr],MaxI,Vdb}.
+%%  Handle a body.
+
+body(#k_seq{arg=Ke,body=Kb}, I, Vdb0) ->
+    %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]),
+    A = get_kanno(Ke),
+    Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0),
+    {Es,MaxI,Vdb2} = body(Kb, I+1, Vdb1),
+    E = expr(Ke, I, Vdb2),
+    {[E|Es],MaxI,Vdb2};
+body(Ke, I, Vdb0) ->
+    %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]),
+    A = get_kanno(Ke),
+    Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0),
+    E = expr(Ke, I, Vdb1),
+    {[E],I,Vdb1}.
+
+%% expr(Kexpr, I, Vdb) -> Expr.
+
+expr(#k_test{anno=A}=Test, I, _Vdb) ->
+    Test#k_test{anno=#l{i=I,a=A#k.a}};
+expr(#k_call{anno=A}=Call, I, _Vdb) ->
+    Call#k_call{anno=#l{i=I,a=A#k.a}};
+expr(#k_enter{anno=A}=Enter, I, _Vdb) ->
+    Enter#k_enter{anno=#l{i=I,a=A#k.a}};
+expr(#k_bif{anno=A}=Bif, I, _Vdb) ->
+    Bif#k_bif{anno=#l{i=I,a=A#k.a}};
+expr(#k_match{anno=A,body=Kb,ret=Rs}, I, Vdb) ->
+    %% Work out imported variables which need to be locked.
+    Mdb = vdb_sub(I, I+1, Vdb),
+    M = match(Kb, A#k.us, I+1, Mdb),
+    L = #l{i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a},
+    #k_match{anno=L,body=M,ret=Rs};
+expr(#k_guard_match{anno=A,body=Kb,ret=Rs}, I, Vdb) ->
+    %% Work out imported variables which need to be locked.
+    Mdb = vdb_sub(I, I+1, Vdb),
+    M = match(Kb, A#k.us, I+1, Mdb),
+    L = #l{i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a},
+    #k_guard_match{anno=L,body=M,ret=Rs};
+expr(#k_protected{}=Protected, I, Vdb) ->
+    protected(Protected, I, Vdb);
+expr(#k_try{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh}=Try, I, Vdb) ->
+    %% Lock variables that are alive before the catch and used afterwards.
+    %% Don't lock variables that are only used inside the try.
+    Tdb0 = vdb_sub(I, I+1, Vdb),
+    %% This is the tricky bit. Lock variables in Arg that are used in
+    %% the body and handler. Add try tag 'variable'.
+    Ab = get_kanno(Kb),
+    Ah = get_kanno(Kh),
+    Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0),
+    Tdb2 = vdb_sub(I, I+2, Tdb1),
+    Vnames = fun (Kvar) -> Kvar#k_var.name end,	%Get the variable names
+    {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, locked, Tdb2)),
+    {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)),
+    {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)),
+    L = #l{i=I,vdb=Tdb1,a=A#k.a},
+    Try#k_try{anno=L,
+              arg=#cg_block{es=Aes,anno=#l{i=I+1,vdb=Adb,a=[]}},
+              vars=Vs,body=#cg_block{es=Bes,anno=#l{i=I+3,vdb=Bdb,a=[]}},
+              evars=Evs,handler=#cg_block{es=Hes,anno=#l{i=I+3,vdb=Hdb,a=[]}}};
+expr(#k_try_enter{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh}, I, Vdb) ->
+    %% Lock variables that are alive before the catch and used afterwards.
+    %% Don't lock variables that are only used inside the try.
+    Tdb0 = vdb_sub(I, I+1, Vdb),
+    %% This is the tricky bit. Lock variables in Arg that are used in
+    %% the body and handler. Add try tag 'variable'.
+    Ab = get_kanno(Kb),
+    Ah = get_kanno(Kh),
+    Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0),
+    Tdb2 = vdb_sub(I, I+2, Tdb1),
+    Vnames = fun (Kvar) -> Kvar#k_var.name end,	%Get the variable names
+    {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, 1000000, Tdb2)),
+    {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)),
+    {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)),
+    L = #l{i=I,vdb=Tdb1,a=A#k.a},
+    #k_try_enter{anno=L,
+                 arg=#cg_block{es=Aes,anno=#l{i=I+1,vdb=Adb,a=[]}},
+                 vars=Vs,body=#cg_block{es=Bes,anno=#l{i=I+3,vdb=Bdb,a=[]}},
+                 evars=Evs,handler=#cg_block{es=Hes,anno=#l{i=I+3,vdb=Hdb,a=[]}}};
+expr(#k_catch{anno=A,body=Kb}=Catch, I, Vdb) ->
+    %% Lock variables that are alive before the catch and used afterwards.
+    %% Don't lock variables that are only used inside the catch.
+    %% Add catch tag 'variable'.
+    Cdb0 = vdb_sub(I, I+1, Vdb),
+    {Es,_,Cdb1} = body(Kb, I+1, add_var({catch_tag,I}, I, locked, Cdb0)),
+    L = #l{i=I,vdb=Cdb1,a=A#k.a},
+    Catch#k_catch{anno=L,body=#cg_block{es=Es}};
+expr(#k_receive{anno=A,var=V,body=Kb,action=Ka}=Recv, I, Vdb) ->
+    %% Work out imported variables which need to be locked.
+    Rdb = vdb_sub(I, I+1, Vdb),
+    M = match(Kb, add_element(V#k_var.name, A#k.us), I+1,
+              new_vars([V#k_var.name], I, Rdb)),
+    {Tes,_,Adb} = body(Ka, I+1, Rdb),
+    Le = #l{i=I,vdb=use_vars(A#k.us, I+1, Vdb),a=A#k.a},
+    Recv#k_receive{anno=Le,body=M,
+                   action=#cg_block{anno=#l{i=I+1,vdb=Adb,a=[]},es=Tes}};
+expr(#k_receive_accept{anno=A}, I, _Vdb) ->
+    #k_receive_accept{anno=#l{i=I,a=A#k.a}};
+expr(#k_receive_next{anno=A}, I, _Vdb) ->
+    #k_receive_next{anno=#l{i=I,a=A#k.a}};
+expr(#k_put{anno=A}=Put, I, _Vdb) ->
+    Put#k_put{anno=#l{i=I,a=A#k.a}};
+expr(#k_break{anno=A}=Break, I, _Vdb) ->
+    Break#k_break{anno=#l{i=I,a=A#k.a}};
+expr(#k_guard_break{anno=A}=Break, I, _Vdb) ->
+    Break#k_guard_break{anno=#l{i=I,a=A#k.a}};
+expr(#k_return{anno=A}=Ret, I, _Vdb) ->
+    Ret#k_return{anno=#l{i=I,a=A#k.a}}.
+
+%% protected(Kprotected, I, Vdb) -> Protected.
+%%  Only used in guards.
+
+protected(#k_protected{anno=A,arg=Ts}=Prot, I, Vdb) ->
+    %% Lock variables that are alive before try and used afterwards.
+    %% Don't lock variables that are only used inside the protected
+    %% expression.
+    Pdb0 = vdb_sub(I, I+1, Vdb),
+    {T,MaxI,Pdb1} = body(Ts, I+1, Pdb0),
+    Pdb2 = use_vars(A#k.ns, MaxI+1, Pdb1),	%Save "return" values
+    Prot#k_protected{arg=T,anno=#l{i=I,a=A#k.a,vdb=Pdb2}}.
+
+%% match(Kexpr, [LockVar], I, Vdb) -> Expr.
+%%  Convert match tree to old format.
+
+match(#k_alt{anno=A,first=Kf,then=Kt}, Ls, I, Vdb0) ->
+    Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0),
+    F = match(Kf, Ls, I+1, Vdb1),
+    T = match(Kt, Ls, I+1, Vdb1),
+    #k_alt{anno=[],first=F,then=T};
+match(#k_select{anno=A,types=Kts}=Select, Ls, I, Vdb0) ->
+    Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0),
+    Ts = [type_clause(Tc, Ls, I+1, Vdb1) || Tc <- Kts],
+    Select#k_select{anno=[],types=Ts};
+match(#k_guard{anno=A,clauses=Kcs}, Ls, I, Vdb0) ->
+    Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0),
+    Cs = [guard_clause(G, Ls, I+1, Vdb1) || G <- Kcs],
+    #k_guard{anno=[],clauses=Cs};
+match(Other, Ls, I, Vdb0) ->
+    Vdb1 = use_vars(Ls, I, Vdb0),
+    {B,_,Vdb2} = body(Other, I+1, Vdb1),
+    Le = #l{i=I,vdb=Vdb2,a=[]},
+    #cg_block{anno=Le,es=B}.
+
+type_clause(#k_type_clause{anno=A,type=T,values=Kvs}, Ls, I, Vdb0) ->
+    %%ok = io:format("life ~w: ~p~n", [?LINE,{T,Kvs}]),
+    Vdb1 = use_vars(union(A#k.us, Ls), I+1, Vdb0),
+    Vs = [val_clause(Vc, Ls, I+1, Vdb1) || Vc <- Kvs],
+    #k_type_clause{anno=[],type=T,values=Vs}.
+
+val_clause(#k_val_clause{anno=A,val=V,body=Kb}, Ls0, I, Vdb0) ->
+    New = (get_kanno(V))#k.ns,
+    Bus = (get_kanno(Kb))#k.us,
+    %%ok = io:format("Ls0 = ~p, Used=~p\n  New=~p, Bus=~p\n", [Ls0,Used,New,Bus]),
+    Ls1 = union(intersection(New, Bus), Ls0),	%Lock for safety
+    Vdb1 = use_vars(union(A#k.us, Ls1), I+1, new_vars(New, I, Vdb0)),
+    B = match(Kb, Ls1, I+1, Vdb1),
+    Le = #l{i=I,vdb=use_vars(Bus, I+1, Vdb1),a=A#k.a},
+    #k_val_clause{anno=Le,val=V,body=B}.
+
+guard_clause(#k_guard_clause{anno=A,guard=Kg,body=Kb}, Ls, I, Vdb0) ->
+    Vdb1 = use_vars(union(A#k.us, Ls), I+2, Vdb0),
+    Gdb = vdb_sub(I+1, I+2, Vdb1),
+    G = protected(Kg, I+1, Gdb),
+    B = match(Kb, Ls, I+2, Vdb1),
+    Le = #l{i=I,vdb=use_vars((get_kanno(Kg))#k.us, I+2, Vdb1),a=A#k.a},
+    #k_guard_clause{anno=Le,guard=G,body=B}.
+
+
+%% Here follows the code generator pass.
+%%
+%% The following assumptions have been made:
+%%
+%% 1. Matches, i.e. things with {match,M,Ret} wrappers, only return
+%% values; no variables are exported. If the match would have returned
+%% extra variables then these have been transformed to multiple return
+%% values.
+%%
+%% 2. All BIF's called in guards are gc-safe so there is no need to
+%% put thing on the stack in the guard.  While this would in principle
+%% work it would be difficult to keep track of the stack depth when
+%% trimming.
+%%
+%% The code generation uses variable lifetime information added by
+%% the previous pass to save variables, allocate registers and
+%% move registers to the stack when necessary.
+%%
+%% We try to use a consistent variable name scheme throughout.  The
+%% StackReg record is always called Bef,Int<n>,Aft.
+
 %% cg_fun([Lkexpr], [HeadVar], Vdb, State) -> {[Ainstr],State}
 
 cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, Anno, St0) ->
@@ -114,18 +459,18 @@ cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, Anno, St0) ->
     %% Note that and 'if_end' instruction does not need any
     %% live x registers, so it will always be safe to jump to
     %% it. (We never ever expect the jump to be taken, and in
-    %% must functions there will never be any references to
+    %% most functions there will never be any references to
     %% the label in the first place.)
     %%
 
     {UltimateMatchFail,St3} = new_label(St2),
 
     %% Create initial stack/register state, clear unused arguments.
-    Bef = clear_dead(#sr{reg=foldl(fun ({var,V}, Reg) ->
+    Bef = clear_dead(#sr{reg=foldl(fun (#k_var{name=V}, Reg) ->
 					   put_reg(V, Reg)
 				   end, [], Hvs),
 			 stk=[]}, 0, Vdb),
-    {B,_Aft,St} = cg_list(Les, 0, Vdb, Bef,
+    {B,_Aft,St} = cg_list(Les, Vdb, Bef,
 			  St3#cg{bfail=0,
 				 ultimate_failure=UltimateMatchFail,
 				 is_top_block=true}),
@@ -136,66 +481,64 @@ cg_fun(Les, Hvs, Vdb, AtomMod, NameArity, Anno, St0) ->
 
 %% cg(Lkexpr, Vdb, StackReg, State) -> {[Ainstr],StackReg,State}.
 %%  Generate code for a kexpr.
-%%  Split function into two steps for clarity, not efficiency.
 
-cg(Le, Vdb, Bef, St) ->
-    cg(Le#l.ke, Le, Vdb, Bef, St).
-
-cg({block,Es}, Le, Vdb, Bef, St) ->
+cg(#cg_block{anno=Le,es=Es}, Vdb, Bef, St) ->
     block_cg(Es, Le, Vdb, Bef, St);
-cg({match,M,Rs}, Le, Vdb, Bef, St) ->
+cg(#k_match{anno=Le,body=M,ret=Rs}, Vdb, Bef, St) ->
     match_cg(M, Rs, Le, Vdb, Bef, St);
-cg({guard_match,M,Rs}, Le, Vdb, Bef, St) ->
+cg(#k_guard_match{anno=Le,body=M,ret=Rs}, Vdb, Bef, St) ->
     guard_match_cg(M, Rs, Le, Vdb, Bef, St);
-cg({call,Func,As,Rs}, Le, Vdb, Bef, St) ->
+cg(#k_call{anno=Le,op=Func,args=As,ret=Rs}, Vdb, Bef, St) ->
     call_cg(Func, As, Rs, Le, Vdb, Bef, St);
-cg({enter,Func,As}, Le, Vdb, Bef, St) ->
+cg(#k_enter{anno=Le,op=Func,args=As}, Vdb, Bef, St) ->
     enter_cg(Func, As, Le, Vdb, Bef, St);
-cg({bif,Bif,As,Rs}, Le, Vdb, Bef, St) ->
-    bif_cg(Bif, As, Rs, Le, Vdb, Bef, St);
-cg({gc_bif,Bif,As,Rs}, Le, Vdb, Bef, St) ->
-    gc_bif_cg(Bif, As, Rs, Le, Vdb, Bef, St);
-cg({internal,Bif,As,Rs}, Le, Vdb, Bef, St) ->
-    internal_cg(Bif, As, Rs, Le, Vdb, Bef, St);
-cg({receive_loop,Te,Rvar,Rm,Tes,Rs}, Le, Vdb, Bef, St) ->
+cg(#k_bif{anno=Le}=Bif, Vdb, Bef, St) ->
+    bif_cg(Bif, Le, Vdb, Bef, St);
+cg(#k_receive{anno=Le,timeout=Te,var=Rvar,body=Rm,action=Tes,ret=Rs},
+   Vdb, Bef, St) ->
     recv_loop_cg(Te, Rvar, Rm, Tes, Rs, Le, Vdb, Bef, St);
-cg(receive_next, Le, Vdb, Bef, St) ->
+cg(#k_receive_next{anno=Le}, Vdb, Bef, St) ->
     recv_next_cg(Le, Vdb, Bef, St);
-cg(receive_accept, _Le, _Vdb, Bef, St) -> {[remove_message],Bef,St};
-cg({'try',Ta,Vs,Tb,Evs,Th,Rs}, Le, Vdb, Bef, St) ->
+cg(#k_receive_accept{}, _Vdb, Bef, St) ->
+    {[remove_message],Bef,St};
+cg(#k_try{anno=Le,arg=Ta,vars=Vs,body=Tb,evars=Evs,handler=Th,ret=Rs},
+   Vdb, Bef, St) ->
     try_cg(Ta, Vs, Tb, Evs, Th, Rs, Le, Vdb, Bef, St);
-cg({try_enter,Ta,Vs,Tb,Evs,Th}, Le, Vdb, Bef, St) ->
+cg(#k_try_enter{anno=Le,arg=Ta,vars=Vs,body=Tb,evars=Evs,handler=Th},
+   Vdb, Bef, St) ->
     try_enter_cg(Ta, Vs, Tb, Evs, Th, Le, Vdb, Bef, St);
-cg({'catch',Cb,R}, Le, Vdb, Bef, St) ->
+cg(#k_catch{anno=Le,body=Cb,ret=[R]}, Vdb, Bef, St) ->
     catch_cg(Cb, R, Le, Vdb, Bef, St);
-cg({set,Var,Con}, Le, Vdb, Bef, St) ->
-    set_cg(Var, Con, Le, Vdb, Bef, St);
-cg({return,Rs}, Le, Vdb, Bef, St) -> return_cg(Rs, Le, Vdb, Bef, St);
-cg({break,Bs}, Le, Vdb, Bef, St) -> break_cg(Bs, Le, Vdb, Bef, St);
-cg({guard_break,Bs,N}, Le, Vdb, Bef, St) ->
-    guard_break_cg(Bs, N, Le, Vdb, Bef, St);
-cg({need_heap,H}, _Le, _Vdb, Bef, St) ->
+cg(#k_put{anno=Le,arg=Con,ret=Var},  Vdb, Bef, St) ->
+    put_cg(Var, Con, Le, Vdb, Bef, St);
+cg(#k_return{anno=Le,args=Rs}, Vdb, Bef, St) ->
+    return_cg(Rs, Le, Vdb, Bef, St);
+cg(#k_break{anno=Le,args=Bs}, Vdb, Bef, St) ->
+    break_cg(Bs, Le, Vdb, Bef, St);
+cg(#k_guard_break{anno=Le,args=Bs}, Vdb, Bef, St) ->
+    guard_break_cg(Bs, Le, Vdb, Bef, St);
+cg(#cg_need_heap{h=H}, _Vdb, Bef, St) ->
     {[{test_heap,H,max_reg(Bef#sr.reg)}],Bef,St}.
 
 %% cg_list([Kexpr], FirstI, Vdb, StackReg, St) -> {[Ainstr],StackReg,St}.
 
-cg_list(Kes, I, Vdb, Bef, St0) ->
+cg_list(Kes, Vdb, Bef, St0) ->
     {Keis,{Aft,St1}} =
 	flatmapfoldl(fun (Ke, {Inta,Sta}) ->
 			     {Keis,Intb,Stb} = cg(Ke, Vdb, Inta, Sta),
 			     {Keis,{Intb,Stb}}
-		     end, {Bef,St0}, need_heap(Kes, I)),
+		     end, {Bef,St0}, need_heap(Kes)),
     {Keis,Aft,St1}.
 
 %% need_heap([Lkexpr], I, St) -> [Lkexpr].
 %%  Insert need_heap instructions in Kexpr list.  Try to be smart and
 %%  collect them together as much as possible.
 
-need_heap(Kes0, I) ->
+need_heap(Kes0) ->
     {Kes,H} = need_heap_0(reverse(Kes0), 0, []),
 
     %% Prepend need_heap if necessary.
-    need_heap_need(I, H) ++ Kes.
+    need_heap_need(H) ++ Kes.
 
 need_heap_0([Ke|Kes], H0, Acc) ->
     {Ns,H} = need_heap_1(Ke, H0),
@@ -203,27 +546,54 @@ need_heap_0([Ke|Kes], H0, Acc) ->
 need_heap_0([], H, Acc) ->
     {Acc,H}.
 
-need_heap_1(#l{ke={set,_,{binary,_}},i=I}, H) ->
-    {need_heap_need(I, H),0};
-need_heap_1(#l{ke={set,_,{map,_,_,_}},i=I}, H) ->
-    {need_heap_need(I, H),0};
-need_heap_1(#l{ke={set,_,Val}}, H) ->
+need_heap_1(#k_put{arg=#k_binary{}}, H) ->
+    {need_heap_need(H),0};
+need_heap_1(#k_put{arg=#k_map{}}, H) ->
+    {need_heap_need(H),0};
+need_heap_1(#k_put{arg=Val}, H) ->
     %% Just pass through adding to needed heap.
     {[],H + case Val of
-		{cons,_} -> 2;
-		{tuple,Es} -> 1 + length(Es);
+		#k_cons{} -> 2;
+		#k_tuple{es=Es} -> 1 + length(Es);
 		_Other -> 0
 	    end};
-need_heap_1(#l{ke={bif,_Bif,_As,_Rs}}, H) ->
-    {[],H};
-need_heap_1(#l{i=I}, H) ->
+need_heap_1(#k_bif{}=Bif, H) ->
+    case is_gc_bif(Bif) of
+        false ->
+            {[],H};
+        true ->
+            {need_heap_need(H),0}
+    end;
+need_heap_1(_Ke, H) ->
     %% Call or call-like instruction such as set_tuple_element/3.
-    {need_heap_need(I, H),0}.
-
-need_heap_need(_I, 0) -> [];
-need_heap_need(I, H) -> [#l{ke={need_heap,H},i=I}].
-
-%% match_cg(Match, [Ret], Le, Vdb, StackReg, State) ->
+    {need_heap_need(H),0}.
+
+need_heap_need(0) -> [];
+need_heap_need(H) -> [#cg_need_heap{h=H}].
+
+%% is_gc_bif(#k_bif{}) -> true|false.
+%% is_gc_bif(Name, Arity) -> true|false.
+%%  Determines whether the BIF Name/Arity might do a GC.
+
+is_gc_bif(#k_bif{op=#k_remote{name=#k_atom{val=Name}},args=Args}) ->
+    is_gc_bif(Name, length(Args));
+is_gc_bif(#k_bif{op=#k_internal{}}) ->
+    true.
+
+is_gc_bif(hd, 1) -> false;
+is_gc_bif(tl, 1) -> false;
+is_gc_bif(self, 0) -> false;
+is_gc_bif(node, 0) -> false;
+is_gc_bif(node, 1) -> false;
+is_gc_bif(element, 2) -> false;
+is_gc_bif(get, 1) -> false;
+is_gc_bif(tuple_size, 1) -> false;
+is_gc_bif(Bif, Arity) ->
+    not (erl_internal:bool_op(Bif, Arity) orelse
+	 erl_internal:new_type_test(Bif, Arity) orelse
+	 erl_internal:comp_op(Bif, Arity)).
+
+%% match_cg(Matc, [Ret], Le, Vdb, StackReg, State) ->
 %%	{[Ainstr],StackReg,State}.
 %%  Generate code for a match.  First save all variables on the stack
 %%  that are to survive after the match.  We leave saved variables in
@@ -244,7 +614,10 @@ match_cg(M, Rs, Le, Vdb, Bef, St0) ->
 guard_match_cg(M, Rs, Le, Vdb, Bef, St0) ->
     I = Le#l.i,
     {B,St1} = new_label(St0),
-    #cg{bfail=Fail} = St1,
+    Fail = case St0 of
+               #cg{bfail=0,ultimate_failure=Fail0} -> Fail0;
+               #cg{bfail=Fail0} -> Fail0
+           end,
     {Mis,Aft,St2} = match_cg(M, Fail, Bef, St1#cg{break=B}),
     %% Update the register descriptors for the return registers.
     Reg = guard_match_regs(Aft#sr.reg, Rs),
@@ -252,7 +625,7 @@ guard_match_cg(M, Rs, Le, Vdb, Bef, St0) ->
      clear_dead(Aft#sr{reg=Reg}, I, Vdb),
      St2#cg{break=St1#cg.break}}.
 
-guard_match_regs([{I,gbreakvar}|Rs], [{var,V}|Vs]) ->
+guard_match_regs([{I,gbreakvar}|Rs], [#k_var{name=V}|Vs]) ->
     [{I,V}|guard_match_regs(Rs, Vs)];
 guard_match_regs([R|Rs], Vs) ->
     [R|guard_match_regs(Rs, Vs)];
@@ -264,17 +637,14 @@ guard_match_regs([], []) -> [].
 %%  down as each level which uses this takes its own internal Vdb not
 %%  the outer one.
 
-match_cg(Le, Fail, Bef, St) ->
-    match_cg(Le#l.ke, Le, Fail, Bef, St).
-
-match_cg({alt,F,S}, _Le, Fail, Bef, St0) ->
+match_cg(#k_alt{first=F,then=S}, Fail, Bef, St0) ->
     {Tf,St1} = new_label(St0),
     {Fis,Faft,St2} = match_cg(F, Tf, Bef, St1),
     {Sis,Saft,St3} = match_cg(S, Fail, Bef, St2),
     Aft = sr_merge(Faft, Saft),
     {Fis ++ [{label,Tf}] ++ Sis,Aft,St3};
-match_cg({select,{var,Vname}=V,Scs0}, #l{a=Anno}, Fail, Bef, St) ->
-    ReuseForContext = member(reuse_for_context, Anno) andalso
+match_cg(#k_select{var=#k_var{anno=Vanno,name=Vname}=V,types=Scs0}, Fail, Bef, St) ->
+    ReuseForContext = member(reuse_for_context, Vanno) andalso
 	find_reg(Vname, Bef#sr.reg) =/= error,
     Scs = case ReuseForContext of
 	      false -> Scs0;
@@ -283,10 +653,10 @@ match_cg({select,{var,Vname}=V,Scs0}, #l{a=Anno}, Fail, Bef, St) ->
     match_fmf(fun (S, F, Sta) ->
 		      select_cg(S, V, F, Fail, Bef, Sta) end,
 	      Fail, St, Scs);
-match_cg({guard,Gcs}, _Le, Fail, Bef, St) ->
+match_cg(#k_guard{clauses=Gcs}, Fail, Bef, St) ->
     match_fmf(fun (G, F, Sta) -> guard_clause_cg(G, F, Bef, Sta) end,
 	      Fail, St, Gcs);
-match_cg({block,Es}, Le, _Fail, Bef, St) ->
+match_cg(#cg_block{anno=Le,es=Es}, _Fail, Bef, St) ->
     %% Must clear registers and stack of dead variables.
     Int = clear_dead(Bef, Le#l.i, Le#l.vdb),
     block_cg(Es, Le, Int, St).
@@ -294,8 +664,8 @@ match_cg({block,Es}, Le, _Fail, Bef, St) ->
 %% bsm_rename_ctx([Clause], Var) -> [Clause]
 %%  We know from an annotation that the register for a binary can
 %%  be reused for the match context because the two are not truly
-%%  alive at the same time (even though the conservative life time
-%%  information calculated by v3_life says so).
+%%  alive at the same time (even though the life time information
+%%  says so).
 %%
 %%  The easiest way to have those variables share the same register is
 %%  to rename the variable with the shortest life-span (the match
@@ -306,12 +676,14 @@ match_cg({block,Es}, Le, _Fail, Bef, St) ->
 %%  We must also remove all information about the match context
 %%  variable from all life-time information databases (Vdb).
 
-bsm_rename_ctx([#l{ke={type_clause,binary,
-		       [#l{ke={val_clause,{binary,{var,Old}},Ke0}}=L2]}}=L1|Cs], New) ->
+bsm_rename_ctx([#k_type_clause{type=k_binary,values=Vcs}=TC|Cs], New) ->
+    [#k_val_clause{val=#k_binary{segs=#k_var{name=Old}}=Bin,
+                   body=Ke0}=VC0] = Vcs,
     Ke = bsm_rename_ctx(Ke0, Old, New, false),
-    [L1#l{ke={type_clause,binary,
-	      [L2#l{ke={val_clause,{binary,{var,New}},Ke}}]}}|bsm_rename_ctx(Cs, New)];
-bsm_rename_ctx([C|Cs], New) -> 
+    VC = VC0#k_val_clause{val=Bin#k_binary{segs=#k_var{name=New}},
+                          body=Ke},
+    [TC#k_type_clause{values=[VC]}|bsm_rename_ctx(Cs, New)];
+bsm_rename_ctx([C|Cs], New) ->
     [C|bsm_rename_ctx(Cs, New)];
 bsm_rename_ctx([], _) -> [].
 
@@ -321,34 +693,24 @@ bsm_rename_ctx([], _) -> [].
 %%  only complicatate things to recurse into blocks not in a protected
 %%  (the match context variable is not live inside them).
 
-bsm_rename_ctx(#l{ke={select,{var,V},Cs0}}=L, Old, New, InProt) ->
+bsm_rename_ctx(#k_select{var=#k_var{name=V},types=Cs0}=Sel,
+               Old, New, InProt) ->
     Cs = bsm_rename_ctx_list(Cs0, Old, New, InProt),
-    L#l{ke={select,{var,bsm_rename_var(V, Old, New)},Cs}};
-bsm_rename_ctx(#l{ke={type_clause,Type,Cs0}}=L, Old, New, InProt) ->
+    Sel#k_select{var=#k_var{name=bsm_rename_var(V, Old, New)},types=Cs};
+bsm_rename_ctx(#k_type_clause{values=Cs0}=TC, Old, New, InProt) ->
     Cs = bsm_rename_ctx_list(Cs0, Old, New, InProt),
-    L#l{ke={type_clause,Type,Cs}};
-bsm_rename_ctx(#l{ke={val_clause,{bin_end,V},Ke0}}=L, Old, New, InProt) ->
-    Ke = bsm_rename_ctx(Ke0, Old, New, InProt),
-    L#l{ke={val_clause,{bin_end,bsm_rename_var(V, Old, New)},Ke}};
-bsm_rename_ctx(#l{ke={val_clause,{bin_seg,V,Sz,U,Type,Fl,Vs},Ke0}}=L,
-	       Old, New, InProt) ->
-    Ke = bsm_rename_ctx(Ke0, Old, New, InProt),
-    L#l{ke={val_clause,{bin_seg,bsm_rename_var(V, Old, New),Sz,U,Type,Fl,Vs},Ke}};
-bsm_rename_ctx(#l{ke={val_clause,{bin_int,V,Sz,U,Fl,Val,Vs},Ke0}}=L,
-	       Old, New, InProt) ->
+    TC#k_type_clause{values=Cs};
+bsm_rename_ctx(#k_val_clause{body=Ke0}=VC, Old, New, InProt) ->
     Ke = bsm_rename_ctx(Ke0, Old, New, InProt),
-    L#l{ke={val_clause,{bin_int,bsm_rename_var(V, Old, New),Sz,U,Fl,Val,Vs},Ke}};
-bsm_rename_ctx(#l{ke={val_clause,Val,Ke0}}=L, Old, New, InProt) ->
-    Ke = bsm_rename_ctx(Ke0, Old, New, InProt),
-    L#l{ke={val_clause,Val,Ke}};
-bsm_rename_ctx(#l{ke={alt,F0,S0}}=L, Old, New, InProt) ->
+    VC#k_val_clause{body=Ke};
+bsm_rename_ctx(#k_alt{first=F0,then=S0}=Alt, Old, New, InProt) ->
     F = bsm_rename_ctx(F0, Old, New, InProt),
     S = bsm_rename_ctx(S0, Old, New, InProt),
-    L#l{ke={alt,F,S}};
-bsm_rename_ctx(#l{ke={guard,Gcs0}}=L, Old, New, InProt) ->
+    Alt#k_alt{first=F,then=S};
+bsm_rename_ctx(#k_guard{clauses=Gcs0}=Guard, Old, New, InProt) ->
     Gcs = bsm_rename_ctx_list(Gcs0, Old, New, InProt),
-    L#l{ke={guard,Gcs}};
-bsm_rename_ctx(#l{ke={guard_clause,G0,B0}}=L, Old, New, InProt) ->
+    Guard#k_guard{clauses=Gcs};
+bsm_rename_ctx(#k_guard_clause{guard=G0,body=B0}=GC, Old, New, InProt) ->
     G = bsm_rename_ctx(G0, Old, New, InProt),
     B = bsm_rename_ctx(B0, Old, New, InProt),
     %% A guard clause may cause unsaved variables to be saved on the stack.
@@ -356,49 +718,45 @@ bsm_rename_ctx(#l{ke={guard_clause,G0,B0}}=L, Old, New, InProt) ->
     %% same register), it is neither in the stack nor register descriptor
     %% lists and we would crash when we didn't find it unless we remove
     %% it from the database.
-    bsm_forget_var(L#l{ke={guard_clause,G,B}}, Old);
-bsm_rename_ctx(#l{ke={protected,Ts0,Rs}}=L, Old, New, _InProt) ->
+    bsm_forget_var(GC#k_guard_clause{guard=G,body=B}, Old);
+bsm_rename_ctx(#k_protected{arg=Ts0}=Prot, Old, New, _InProt) ->
     InProt = true,
     Ts = bsm_rename_ctx_list(Ts0, Old, New, InProt),
-    bsm_forget_var(L#l{ke={protected,Ts,Rs}}, Old);
-bsm_rename_ctx(#l{ke={match,Ms0,Rs}}=L, Old, New, InProt) ->
-    Ms = bsm_rename_ctx(Ms0, Old, New, InProt),
-    L#l{ke={match,Ms,Rs}};
-bsm_rename_ctx(#l{ke={guard_match,Ms0,Rs}}=L, Old, New, InProt) ->
+    bsm_forget_var(Prot#k_protected{arg=Ts}, Old);
+bsm_rename_ctx(#k_guard_match{body=Ms0}=Match, Old, New, InProt) ->
     Ms = bsm_rename_ctx(Ms0, Old, New, InProt),
-    L#l{ke={guard_match,Ms,Rs}};
-bsm_rename_ctx(#l{ke={test,_,_,_}}=L, _, _, _) -> L;
-bsm_rename_ctx(#l{ke={bif,_,_,_}}=L, _, _, _) -> L;
-bsm_rename_ctx(#l{ke={gc_bif,_,_,_}}=L, _, _, _) -> L;
-bsm_rename_ctx(#l{ke={set,_,_}}=L, _, _, _) -> L;
-bsm_rename_ctx(#l{ke={call,_,_,_}}=L, _, _, _) -> L;
-bsm_rename_ctx(#l{ke={block,_}}=L, Old, _, false) ->
+    Match#k_guard_match{body=Ms};
+bsm_rename_ctx(#k_test{}=Test, _, _, _) -> Test;
+bsm_rename_ctx(#k_bif{}=Bif, _, _, _) -> Bif;
+bsm_rename_ctx(#k_put{}=Put, _, _, _) -> Put;
+bsm_rename_ctx(#k_call{}=Call, _, _, _) -> Call;
+bsm_rename_ctx(#cg_block{}=Block, Old, _, false) ->
     %% This block is not inside a protected. The match context variable cannot
     %% possibly be live inside the block.
-    bsm_forget_var(L, Old);
-bsm_rename_ctx(#l{ke={block,Bl0}}=L, Old, New, true) ->
+    bsm_forget_var(Block, Old);
+bsm_rename_ctx(#cg_block{es=Es0}=Block, Old, New, true) ->
     %% A block in a protected. We must recursively rename the variable
     %% inside the block.
-    Bl = bsm_rename_ctx_list(Bl0, Old, New, true),
-    bsm_forget_var(L#l{ke={block,Bl}}, Old);
-bsm_rename_ctx(#l{ke={guard_break,Bs,Locked0}}=L0, Old, _New, _InProt) ->
-    Locked = Locked0 -- [Old],
-    L = L0#l{ke={guard_break,Bs,Locked}},
-    bsm_forget_var(L, Old).
+    Es = bsm_rename_ctx_list(Es0, Old, New, true),
+    bsm_forget_var(Block#cg_block{es=Es}, Old);
+bsm_rename_ctx(#k_guard_break{}=Break, Old, _New, _InProt) ->
+    bsm_forget_var(Break, Old).
 
 bsm_rename_ctx_list([C|Cs], Old, New, InProt) ->
     [bsm_rename_ctx(C, Old, New, InProt)|
      bsm_rename_ctx_list(Cs, Old, New, InProt)];
 bsm_rename_ctx_list([], _, _, _) -> [].
-    
+
 bsm_rename_var(Old, Old, New) -> New;
 bsm_rename_var(V, _, _) -> V.
 
 %% bsm_forget_var(#l{}, Variable) -> #l{}
 %%  Remove a variable from the variable life-time database.
 
-bsm_forget_var(#l{vdb=Vdb}=L, V) ->
-    L#l{vdb=keydelete(V, 1, Vdb)}.
+bsm_forget_var(Ke, V) ->
+    #l{vdb=Vdb} = L0 = get_kanno(Ke),
+    L = L0#l{vdb=keydelete(V, 1, Vdb)},
+    set_kanno(Ke, L).
 
 %% block_cg([Kexpr], Le, Vdb, StackReg, St) -> {[Ainstr],StackReg,St}.
 %% block_cg([Kexpr], Le, StackReg, St) -> {[Ainstr],StackReg,St}.
@@ -407,158 +765,227 @@ block_cg(Es, Le, _Vdb, Bef, St) ->
     block_cg(Es, Le, Bef, St).
 
 block_cg(Es, Le, Bef, #cg{is_top_block=false}=St) ->
-    cg_block(Es, Le#l.i, Le#l.vdb, Bef, St);
-block_cg(Es, Le, Bef, St0) ->
-    {Is0,Aft,St} = cg_block(Es, Le#l.i, Le#l.vdb, Bef,
-			    St0#cg{is_top_block=false,need_frame=false}),
-    Is = top_level_block(Is0, Aft, max_reg(Bef#sr.reg), St),
-    {Is,Aft,St#cg{is_top_block=true}}.
-
-cg_block([], _I, _Vdb, Bef, St0) ->
+    cg_block(Es, Le#l.vdb, Bef, St);
+block_cg(Es, Le, Bef, #cg{is_top_block=true}=St0) ->
+    %% No stack frame has been established yet. Do we need one?
+    case need_stackframe(Es) of
+        true ->
+            %% We need a stack frame. Generate the code and add the
+            %% code for creating and deallocating the stack frame.
+            {Is0,Aft,St} = cg_block(Es, Le#l.vdb, Bef,
+                                    St0#cg{is_top_block=false,need_frame=false}),
+            Is = top_level_block(Is0, Aft, max_reg(Bef#sr.reg), St),
+            {Is,Aft,St#cg{is_top_block=true}};
+        false ->
+            %% This sequence of instructions ending in a #k_match{} (a
+            %% 'case' or 'if') in the Erlang code does not need a
+            %% stack frame yet. Delay the creation (if a stack frame
+            %% is needed at all, it will be created inside the
+            %% #k_match{}).
+            cg_list(Es, Le#l.vdb, Bef, St0)
+    end.
+
+%% need_stackframe([Kexpr]) -> true|false.
+%%  Does this list of instructions need a stack frame?
+%%
+%%  A sequence of instructions that don't clobber the X registers
+%%  followed by a single #k_match{} doesn't need a stack frame.
+
+need_stackframe([H|T]) ->
+    case H of
+        #k_bif{op=#k_internal{}} -> true;
+        #k_put{arg=#k_binary{}} -> true;
+        #k_bif{} -> need_stackframe(T);
+        #k_put{} -> need_stackframe(T);
+        #k_guard_match{} -> need_stackframe(T);
+        #k_match{} when T =:= [] -> false;
+        _ -> true
+    end;
+need_stackframe([]) -> false.
+
+cg_block([], _Vdb, Bef, St0) ->
     {[],Bef,St0};
-cg_block(Kes0, I, Vdb, Bef, St0) ->
+cg_block(Kes0, Vdb, Bef, St0) ->
     {Kes2,Int1,St1} =
 	case basic_block(Kes0) of
 	    {Kes1,LastI,Args,Rest} ->
-		Ke = hd(Kes1),
-		Fb = Ke#l.i,
-		cg_basic_block(Kes1, Fb, LastI, Args, Vdb, Bef, St0);
+		cg_basic_block(Kes1, LastI, Args, Vdb, Bef, St0);
 	    {Kes1,Rest} ->
-		cg_list(Kes1, I, Vdb, Bef, St0)
+		cg_list(Kes1, Vdb, Bef, St0)
 	end,
-    {Kes3,Int2,St2} = cg_block(Rest, I, Vdb, Int1, St1),
+    {Kes3,Int2,St2} = cg_block(Rest, Vdb, Int1, St1),
     {Kes2 ++ Kes3,Int2,St2}.
 
 basic_block(Kes) -> basic_block(Kes, []).
 
-basic_block([Le|Les], Acc) ->
-    case collect_block(Le#l.ke) of
-	include -> basic_block(Les, [Le|Acc]);
+basic_block([Ke|Kes], Acc) ->
+    case collect_block(Ke) of
+	include -> basic_block(Kes, [Ke|Acc]);
 	{block_end,As} ->
 	    case Acc of
 		[] ->
-		    %% If the basic block does not contain any set instructions,
+		    %% If the basic block does not contain any #k_put{} instructions,
 		    %% it serves no useful purpose to do basic block optimizations.
-		    {[Le],Les};
+		    {[Ke],Kes};
 		_ ->
-		    {reverse(Acc, [Le]),Le#l.i,As,Les}
+                    #l{i=I} = get_kanno(Ke),
+		    {reverse(Acc, [Ke]),I,As,Kes}
 	    end;
-	no_block -> {reverse(Acc, [Le]),Les}
+	no_block -> {reverse(Acc, [Ke]),Kes}
     end.
 
-%% sets that may garbage collect are not allowed in basic blocks.
-	
-collect_block({set,_,{binary,_}})    -> no_block;
-collect_block({set,_,{map,_,_,_}})   -> no_block;
-collect_block({set,_,_})             -> include;
-collect_block({call,{var,_}=Var,As,_Rs}) -> {block_end,As++[Var]};
-collect_block({call,Func,As,_Rs})   -> {block_end,As++func_vars(Func)};
-collect_block({enter,{var,_}=Var,As})-> {block_end,As++[Var]};
-collect_block({enter,Func,As})       -> {block_end,As++func_vars(Func)};
-collect_block({return,Rs})           -> {block_end,Rs};
-collect_block({break,Bs})            -> {block_end,Bs};
-collect_block(_)                     -> no_block.
-
-func_vars({remote,M,F}) when element(1, M) =:= var;
-			     element(1, F) =:= var ->
+collect_block(#k_put{arg=Arg}) ->
+    %% #k_put{} instructions that may garbage collect are not allowed
+    %% in basic blocks.
+    case Arg of
+        #k_binary{} -> no_block;
+        #k_map{} -> no_block;
+        _ -> include
+    end;
+collect_block(#k_call{op=Func,args=As}) ->
+    {block_end,As++func_vars(Func)};
+collect_block(#k_enter{op=Func,args=As}) ->
+    {block_end,As++func_vars(Func)};
+collect_block(#k_return{args=Rs}) ->
+    {block_end,Rs};
+collect_block(#k_break{args=Bs}) ->
+    {block_end,Bs};
+collect_block(_) -> no_block.
+
+func_vars(#k_var{}=Var) ->
+    [Var];
+func_vars(#k_remote{mod=M,name=F})
+  when is_record(M, k_var); is_record(F, k_var) ->
     [M,F];
 func_vars(_) -> [].
 
-%% cg_basic_block([Kexpr], FirstI, LastI, As, Vdb, StackReg, State) ->
+%% cg_basic_block([Kexpr], FirstI, LastI, Arguments, Vdb, StackReg, State) ->
 %%      {[Ainstr],StackReg,State}.
-
-cg_basic_block(Kes, Fb, Lf, As, Vdb, Bef, St0) ->
-    Res = make_reservation(As, 0),
-    Regs0 = reserve(Res, Bef#sr.reg, Bef#sr.stk),
-    Stk = extend_stack(Bef, Lf, Lf+1, Vdb),
-    Int0 = Bef#sr{reg=Regs0,stk=Stk,res=Res},
-    X0_v0 = x0_vars(As, Fb, Lf, Vdb),
-    {Keis,{Aft,_,St1}} =
+%%
+%%  Do a specialized code generation for a basic block of #put{}
+%%  instructions (that don't do any garbage collection) followed by a
+%%  call, break, or return.
+%%
+%%  'Arguments' is a list of the variables that must be loaded into
+%%  consecutive X registers before the last instruction in the block.
+%%  The point of this specialized code generation is to try put the
+%%  all of the variables in 'Arguments' into the correct X register
+%%  to begin with, instead of putting them into the first available
+%%  X register and having to move them to the correct X register
+%%  later.
+%%
+%%  To achieve that, we attempt to reserve the X registers that the
+%%  variables in 'Arguments' will need to be in when the block ends.
+%%
+%%  To make it more likely that reservations will be successful, we
+%%  will try to save variables that need to be saved to the stack as
+%%  early as possible (if an X register needed by a variable in
+%%  Arguments is occupied by another variable, the value in the
+%%  X register can be evicted if it is saved on the stack).
+%%
+%%  We will take care not to increase the size of stack frame compared
+%%  to what the standard code generator would have done (that is, to
+%%  save all X registers at the last possible moment). We will do that
+%%  by extending the stack frame to the minimal size needed to save
+%%  all that needs to be saved using extend_stack/4, and use
+%%  save_carefully/4 during code generation to only save the variables
+%%  that can be saved without growing the stack frame.
+
+cg_basic_block(Kes, Lf, As, Vdb, Bef, St0) ->
+    Int0 = reserve_arg_regs(As, Bef),
+    Int = extend_stack(Int0, Lf, Lf+1, Vdb),
+    {Keis,{Aft,St1}} =
 	flatmapfoldl(fun(Ke, St) -> cg_basic_block(Ke, St, Lf, Vdb) end,
-		     {Int0,X0_v0,St0}, need_heap(Kes, Fb)),
+		     {Int,St0}, need_heap(Kes)),
     {Keis,Aft,St1}.
 
-cg_basic_block(#l{ke={need_heap,_}}=Ke, {Inta,X0v,Sta}, _Lf, Vdb) ->
-    {Keis,Intb,Stb} = cg(Ke, Vdb, Inta, Sta),
-    {Keis, {Intb,X0v,Stb}};
-cg_basic_block(Ke, {Inta,X0_v1,Sta}, Lf, Vdb) ->
-    {Sis,Intb} = save_carefully(Inta, Ke#l.i, Lf+1, Vdb),
-    {X0_v2,Intc} = allocate_x0(X0_v1, Ke#l.i, Intb),
-    Intd = reserve(Intc),
-    {Keis,Inte,Stb} = cg(Ke, Vdb, Intd, Sta),
-    {Sis ++ Keis, {Inte,X0_v2,Stb}}.
-
-make_reservation([], _) -> [];
-make_reservation([{var,V}|As], I) -> [{I,V}|make_reservation(As, I+1)];
-make_reservation([A|As], I) -> [{I,A}|make_reservation(As, I+1)].
-
-reserve(Sr) -> Sr#sr{reg=reserve(Sr#sr.res, Sr#sr.reg, Sr#sr.stk)}.
-
-reserve([{I,V}|Rs], [free|Regs], Stk) -> [{reserved,I,V}|reserve(Rs, Regs, Stk)];
-reserve([{I,V}|Rs], [{I,V}|Regs], Stk) -> [{I,V}|reserve(Rs, Regs, Stk)];
-reserve([{I,V}|Rs], [{I,Var}|Regs], Stk) ->
+cg_basic_block(#cg_need_heap{}=Ke, {Bef,St0}, _Lf, Vdb) ->
+    {Keis,Aft,St1} = cg(Ke, Vdb, Bef, St0),
+    {Keis,{Aft,St1}};
+cg_basic_block(Ke, {Bef,St0}, Lf, Vdb) ->
+    #l{i=I} = get_kanno(Ke),
+
+    %% Save all we can to increase the possibility that reserving
+    %% registers will succeed.
+    {Sis,Int0} = save_carefully(Bef, I, Lf+1, Vdb),
+    Int1 = reserve(Int0),
+    {Keis,Aft,St1} = cg(Ke, Vdb, Int1, St0),
+    {Sis ++ Keis,{Aft,St1}}.
+
+%% reserve_arg_regs([Argument], Bef) -> Aft.
+%%  Try to reserve the X registers for all arguments. All registers
+%%  that we wish to reserve will be saved in Bef#sr.res.
+
+reserve_arg_regs(As, Bef) ->
+    Res = reserve_arg_regs_1(As, 0),
+    reserve(Bef#sr{res=Res}).
+
+reserve_arg_regs_1([#k_var{name=V}|As], I) ->
+    [{I,V}|reserve_arg_regs_1(As, I+1)];
+reserve_arg_regs_1([A|As], I) ->
+    [{I,A}|reserve_arg_regs_1(As, I+1)];
+reserve_arg_regs_1([], _) -> [].
+
+%% reserve(Bef) -> Aft.
+%%  Try to reserve more registers. The registers we wish to reserve
+%%  are found in Bef#sr.res.
+
+reserve(#sr{reg=Regs,stk=Stk,res=Res}=Sr) ->
+    Sr#sr{reg=reserve_1(Res, Regs, Stk)}.
+
+reserve_1([{I,V}|Rs], [free|Regs], Stk) ->
+    [{reserved,I,V}|reserve_1(Rs, Regs, Stk)];
+reserve_1([{I,V}|Rs], [{I,V}|Regs], Stk) ->
+    [{I,V}|reserve_1(Rs, Regs, Stk)];
+reserve_1([{I,V}|Rs], [{I,Var}|Regs], Stk) ->
     case on_stack(Var, Stk) of
-	true -> [{reserved,I,V}|reserve(Rs, Regs, Stk)];
-	false -> [{I,Var}|reserve(Rs, Regs, Stk)]
+	true -> [{reserved,I,V}|reserve_1(Rs, Regs, Stk)];
+	false -> [{I,Var}|reserve_1(Rs, Regs, Stk)]
     end;
-reserve([{I,V}|Rs], [{reserved,I,_}|Regs], Stk) ->
-    [{reserved,I,V}|reserve(Rs, Regs, Stk)];
-%reserve([{I,V}|Rs], [Other|Regs], Stk) -> [Other|reserve(Rs, Regs, Stk)];
-reserve([{I,V}|Rs], [], Stk) -> [{reserved,I,V}|reserve(Rs, [], Stk)];
-reserve([], Regs, _) -> Regs.
-
-extend_stack(Bef, Fb, Lf, Vdb) ->
-    Stk0 = clear_dead_stk(Bef#sr.stk, Fb, Vdb),
-    Saves = [V || {V,F,L} <- Vdb,
-		  F < Fb,
-		  L >= Lf,
-		  not on_stack(V, Stk0)],
-    Stk1 = foldl(fun (V, Stk) -> put_stack(V, Stk) end, Stk0, Saves),
-    Bef#sr.stk ++ lists:duplicate(length(Stk1) - length(Bef#sr.stk), free).
-
-save_carefully(Bef, Fb, Lf, Vdb) ->
-    Stk = Bef#sr.stk,
-    %% New variables that are in use but not on stack.
-    New = [VFL || {V,F,L} = VFL <- Vdb,
-		  F < Fb,
-		  L >= Lf,
-		  not on_stack(V, Stk)],
-    Saves = [V || {V,_,_} <- keysort(2, New)],
-    save_carefully(Saves, Bef, []).
-
-save_carefully([], Bef, Acc) -> {reverse(Acc),Bef};
-save_carefully([V|Vs], Bef, Acc) ->
-    case put_stack_carefully(V, Bef#sr.stk) of
-	error -> {reverse(Acc),Bef};
+reserve_1([{I,V}|Rs], [{reserved,I,_}|Regs], Stk) ->
+    [{reserved,I,V}|reserve_1(Rs, Regs, Stk)];
+reserve_1([{I,V}|Rs], [], Stk) ->
+    [{reserved,I,V}|reserve_1(Rs, [], Stk)];
+reserve_1([], Regs, _) -> Regs.
+
+%% extend_stack(Bef, FirstBefore, LastFrom, Vdb) -> Aft.
+%%  Extend the stack enough to fit all variables alive past LastFrom
+%%  and not already on the stack.
+
+extend_stack(#sr{stk=Stk0}=Bef, Fb, Lf, Vdb) ->
+    Stk1 = clear_dead_stk(Stk0, Fb, Vdb),
+    New = new_not_on_stack(Stk1, Fb, Lf, Vdb),
+    Stk2 = foldl(fun ({V,_,_}, Stk) -> put_stack(V, Stk) end, Stk1, New),
+    Stk = Stk0 ++ lists:duplicate(length(Stk2) - length(Stk0), free),
+    Bef#sr{stk=Stk}.
+
+%% save_carefully(Bef, FirstBefore, LastFrom, Vdb) -> {[SaveVar],Aft}.
+%%  Save variables which are used past current point and which are not
+%%  already on the stack, but only if the variables can be saved without
+%%  growing the stack frame.
+
+save_carefully(#sr{stk=Stk}=Bef, Fb, Lf, Vdb) ->
+    New0 = new_not_on_stack(Stk, Fb, Lf, Vdb),
+    New = keysort(2, New0),
+    save_carefully_1(New, Bef, []).
+
+save_carefully_1([{V,_,_}|Vs], #sr{reg=Regs,stk=Stk0}=Bef, Acc) ->
+    case put_stack_carefully(V, Stk0) of
+	error ->
+            {reverse(Acc),Bef};
 	Stk1 ->
-	    SrcReg = fetch_reg(V, Bef#sr.reg),
+	    SrcReg = fetch_reg(V, Regs),
 	    Move = {move,SrcReg,fetch_stack(V, Stk1)},
 	    {x,_} = SrcReg,			%Assertion - must be X register.
-	    save_carefully(Vs, Bef#sr{stk=Stk1}, [Move|Acc])
-    end.
+	    save_carefully_1(Vs, Bef#sr{stk=Stk1}, [Move|Acc])
+    end;
+save_carefully_1([], Bef, Acc) ->
+    {reverse(Acc),Bef}.
 
-x0_vars([], _Fb, _Lf, _Vdb) -> [];
-x0_vars([{var,V}|_], Fb, _Lf, Vdb) ->
-    {V,F,_L} = VFL = vdb_find(V, Vdb),
-    x0_vars1([VFL], Fb, F, Vdb);
-x0_vars([X0|_], Fb, Lf, Vdb) ->
-    x0_vars1([{X0,Lf,Lf}], Fb, Lf, Vdb).
-
-x0_vars1(X0, Fb, Xf, Vdb) ->
-    Vs0 = [VFL || {_V,F,L}=VFL <- Vdb,
-		  F >= Fb,
-		  L < Xf],
-    Vs1 = keysort(3, Vs0),
-    keysort(2, X0++Vs1).
-
-allocate_x0([], _, Bef) -> {[],Bef#sr{res=[]}};
-allocate_x0([{_,_,L}|Vs], I, Bef) when L =< I ->
-    allocate_x0(Vs, I, Bef);
-allocate_x0([{V,_F,_L}=VFL|Vs], _, Bef) ->
-    {[VFL|Vs],Bef#sr{res=reserve_x0(V, Bef#sr.res)}}.
-
-reserve_x0(V, [_|Res]) -> [{0,V}|Res];
-reserve_x0(V, []) -> [{0,V}].
+%% top_level_block([Instruction], Bef, MaxRegs, St) -> [Instruction].
+%%  For the top-level block, allocate a stack frame a necessary,
+%%  adjust Y register numbering and instructions that return
+%%  from the function.
 
 top_level_block(Keis, #sr{stk=[]}, _MaxRegs, #cg{need_frame=false}) ->
     Keis;
@@ -640,21 +1067,27 @@ turn_yreg(Other, _MaxY) ->
 %%  wrong.  These are different as in the second case there is no need
 %%  to try the next type, it will always fail.
 
-select_cg(#l{ke={type_clause,cons,[S]}}, {var,V}, Tf, Vf, Bef, St) ->
+select_cg(#k_type_clause{type=Type,values=Vs}, Var, Tf, Vf, Bef, St) ->
+    #k_var{name=V} = Var,
+    select_cg(Type, Vs, V, Tf, Vf, Bef, St).
+
+select_cg(k_cons, [S], V, Tf, Vf, Bef, St) ->
     select_cons(S, V, Tf, Vf, Bef, St);
-select_cg(#l{ke={type_clause,nil,[S]}}, {var,V}, Tf, Vf, Bef, St) ->
+select_cg(k_nil, [S], V, Tf, Vf, Bef, St) ->
     select_nil(S, V, Tf, Vf, Bef, St);
-select_cg(#l{ke={type_clause,binary,[S]}}, {var,V}, Tf, Vf, Bef, St) ->
+select_cg(k_binary, [S], V, Tf, Vf, Bef, St) ->
     select_binary(S, V, Tf, Vf, Bef, St);
-select_cg(#l{ke={type_clause,bin_seg,S}}, {var,V}, Tf, _Vf, Bef, St) ->
+select_cg(k_bin_seg, S, V, Tf, _Vf, Bef, St) ->
     select_bin_segs(S, V, Tf, Bef, St);
-select_cg(#l{ke={type_clause,bin_int,S}}, {var,V}, Tf, _Vf, Bef, St) ->
+select_cg(k_bin_int, S, V, Tf, _Vf, Bef, St) ->
     select_bin_segs(S, V, Tf, Bef, St);
-select_cg(#l{ke={type_clause,bin_end,[S]}}, {var,V}, Tf, _Vf, Bef, St) ->
+select_cg(k_bin_end, [S], V, Tf, _Vf, Bef, St) ->
     select_bin_end(S, V, Tf, Bef, St);
-select_cg(#l{ke={type_clause,map,S}}, {var,V}, Tf, Vf, Bef, St) ->
+select_cg(k_map, S, V, Tf, Vf, Bef, St) ->
     select_map(S, V, Tf, Vf, Bef, St);
-select_cg(#l{ke={type_clause,Type,Scs}}, {var,V}, Tf, Vf, Bef, St0) ->
+select_cg(k_literal, S, V, Tf, Vf, Bef, St) ->
+    select_literal(S, V, Tf, Vf, Bef, St);
+select_cg(Type, Scs, V, Tf, Vf, Bef, St0) ->
     {Vis,{Aft,St1}} =
 	mapfoldl(fun (S, {Int,Sta}) ->
 			 {Val,Is,Inta,Stb} = select_val(S, V, Vf, Bef, Sta),
@@ -664,22 +1097,29 @@ select_cg(#l{ke={type_clause,Type,Scs}}, {var,V}, Tf, Vf, Bef, St0) ->
     {Vls,Sis,St2} = select_labels(OptVls, St1, [], []),
     {select_val_cg(Type, fetch_var(V, Bef), Vls, Tf, Vf, Sis), Aft, St2}.
 
-select_val_cg(tuple, R, [Arity,{f,Lbl}], Tf, Vf, [{label,Lbl}|Sis]) ->
+select_val_cg(k_tuple, R, [Arity,{f,Lbl}], Tf, Vf, [{label,Lbl}|Sis]) ->
     [{test,is_tuple,{f,Tf},[R]},{test,test_arity,{f,Vf},[R,Arity]}|Sis];
-select_val_cg(tuple, R, Vls, Tf, Vf, Sis) ->
+select_val_cg(k_tuple, R, Vls, Tf, Vf, Sis) ->
     [{test,is_tuple,{f,Tf},[R]},{select_tuple_arity,R,{f,Vf},{list,Vls}}|Sis];
 select_val_cg(Type, R, [Val, {f,Lbl}], Fail, Fail, [{label,Lbl}|Sis]) ->
-    [{test,is_eq_exact,{f,Fail},[R,{Type,Val}]}|Sis];
+    [{test,is_eq_exact,{f,Fail},[R,{type(Type),Val}]}|Sis];
 select_val_cg(Type, R, [Val, {f,Lbl}], Tf, Vf, [{label,Lbl}|Sis]) ->
     [{test,select_type_test(Type),{f,Tf},[R]},
-     {test,is_eq_exact,{f,Vf},[R,{Type,Val}]}|Sis];
+     {test,is_eq_exact,{f,Vf},[R,{type(Type),Val}]}|Sis];
 select_val_cg(Type, R, Vls0, Tf, Vf, Sis) ->
-    Vls1 = [case Value of {f,_Lbl} -> Value; _ -> {Type,Value} end || Value <- Vls0],
+    Vls1 = [case Value of
+                {f,_Lbl} -> Value;
+                _ -> {type(Type),Value}
+            end || Value <- Vls0],
     [{test,select_type_test(Type),{f,Tf},[R]}, {select_val,R,{f,Vf},{list,Vls1}}|Sis].
-    
-select_type_test(integer) -> is_integer;
-select_type_test(atom) -> is_atom;
-select_type_test(float) -> is_float.
+
+type(k_atom) -> atom;
+type(k_float) -> float;
+type(k_int) -> integer.
+
+select_type_test(k_int) -> is_integer;
+select_type_test(k_atom) -> is_atom;
+select_type_test(k_float) -> is_float.
 
 combine([{Is,Vs1}, {Is,Vs2}|Vis]) -> combine([{Is,Vs1 ++ Vs2}|Vis]);
 combine([V|Vis]) -> [V|combine(Vis)];
@@ -695,36 +1135,50 @@ add_vls([V|Vs], Lbl, Acc) ->
     add_vls(Vs, Lbl, [V, {f,Lbl}|Acc]);
 add_vls([], _, Acc) -> Acc.
 
-select_cons(#l{ke={val_clause,{cons,Es},B},i=I,vdb=Vdb}, V, Tf, Vf, Bef, St0) ->
+select_literal(S, V, Tf, Vf, Bef, St) ->
+    Reg = fetch_var(V, Bef),
+    F = fun(ValClause, Fail, St0) ->
+                {Val,Is,Aft,St1} = select_val(ValClause, V, Vf, Bef, St0),
+                Test = {test,is_eq_exact,{f,Fail},[Reg,{literal,Val}]},
+                {[Test|Is],Aft,St1}
+        end,
+    match_fmf(F, Tf, St, S).
+
+select_cons(#k_val_clause{val=#k_cons{hd=Hd,tl=Tl},body=B,anno=#l{i=I,vdb=Vdb}},
+            V, Tf, Vf, Bef, St0) ->
+    Es = [Hd,Tl],
     {Eis,Int,St1} = select_extract_cons(V, Es, I, Vdb, Bef, St0),
     {Bis,Aft,St2} = match_cg(B, Vf, Int, St1),
     {[{test,is_nonempty_list,{f,Tf},[fetch_var(V, Bef)]}] ++ Eis ++ Bis,Aft,St2}.
 
-select_nil(#l{ke={val_clause,nil,B}}, V, Tf, Vf, Bef, St0) ->
+select_nil(#k_val_clause{val=#k_nil{},body=B}, V, Tf, Vf, Bef, St0) ->
     {Bis,Aft,St1} = match_cg(B, Vf, Bef, St0),
     {[{test,is_nil,{f,Tf},[fetch_var(V, Bef)]}] ++ Bis,Aft,St1}.
 
-select_binary(#l{ke={val_clause,{binary,{var,V}},B},i=I,vdb=Vdb},
-	      V, Tf, Vf, Bef, St0) ->
+select_binary(#k_val_clause{val=#k_binary{segs=#k_var{name=V}},body=B,
+                            anno=#l{i=I,vdb=Vdb}}, V, Tf, Vf, Bef, St0) ->
+    #cg{ctx=OldCtx} = St0,
     Int0 = clear_dead(Bef#sr{reg=Bef#sr.reg}, I, Vdb),
-    {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0),
+    {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0#cg{ctx=V}),
     CtxReg = fetch_var(V, Int0),
     Live = max_reg(Bef#sr.reg),
-    Bis1 = [{test,bs_start_match2,{f,Tf},Live,[CtxReg,V],CtxReg},
+    Bis1 = [{test,bs_start_match2,{f,Tf},Live,[CtxReg,{context,V}],CtxReg},
 	    {bs_save2,CtxReg,{V,V}}|Bis0],
     Bis = finish_select_binary(Bis1),
-    {Bis,Aft,St1};
-select_binary(#l{ke={val_clause,{binary,{var,Ivar}},B},i=I,vdb=Vdb},
-	      V, Tf, Vf, Bef, St0) ->
+    {Bis,Aft,St1#cg{ctx=OldCtx}};
+select_binary(#k_val_clause{val=#k_binary{segs=#k_var{name=Ivar}},body=B,
+                            anno=#l{i=I,vdb=Vdb}}, V, Tf, Vf, Bef, St0) ->
+    #cg{ctx=OldCtx} = St0,
     Regs = put_reg(Ivar, Bef#sr.reg),
     Int0 = clear_dead(Bef#sr{reg=Regs}, I, Vdb),
-    {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0),
+    {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0#cg{ctx=Ivar}),
     CtxReg = fetch_var(Ivar, Int0),
     Live = max_reg(Bef#sr.reg),
-    Bis1 = [{test,bs_start_match2,{f,Tf},Live,[fetch_var(V, Bef),Ivar],CtxReg},
+    Bis1 = [{test,bs_start_match2,{f,Tf},Live,
+             [fetch_var(V, Bef),{context,Ivar}],CtxReg},
 	    {bs_save2,CtxReg,{Ivar,Ivar}}|Bis0],
     Bis = finish_select_binary(Bis1),
-    {Bis,Aft,St1}.
+    {Bis,Aft,St1#cg{ctx=OldCtx}}.
 
 finish_select_binary([{bs_save2,R,Point}=I,{bs_restore2,R,Point}|Is]) ->
     [I|finish_select_binary(Is)];
@@ -746,9 +1200,16 @@ select_bin_segs(Scs, Ivar, Tf, Bef, St) ->
 		      select_bin_seg(S, Ivar, Fail, Bef, Sta) end,
 	      Tf, St, Scs).
 
-select_bin_seg(#l{ke={val_clause,{bin_seg,Ctx,Size,U,T,Fs0,Es},B},i=I,vdb=Vdb,a=A},
-	       Ivar, Fail, Bef, St0) ->
+select_bin_seg(#k_val_clause{val=#k_bin_seg{size=Size,unit=U,type=T,
+                                            seg=Seg,flags=Fs0,next=Next},
+                             body=B,
+                             anno=#l{i=I,vdb=Vdb,a=A}}, Ivar, Fail, Bef, St0) ->
+    Ctx = St0#cg.ctx,
     Fs = [{anno,A}|Fs0],
+    Es = case Next of
+             [] -> [Seg];
+             _ -> [Seg,Next]
+         end,
     {Mis,Int,St1} = select_extract_bin(Es, Size, U, T, Fs, Fail,
 				       I, Vdb, Bef, Ctx, B, St0),
     {Bis,Aft,St2} = match_cg(B, Fail, Int, St1),
@@ -761,9 +1222,12 @@ select_bin_seg(#l{ke={val_clause,{bin_seg,Ctx,Size,U,T,Fs0,Es},B},i=I,vdb=Vdb,a=
 		 [{bs_restore2,CtxReg,{Ctx,Ivar}}|Mis++Bis]
 	 end,
     {Is,Aft,St2};
-select_bin_seg(#l{ke={val_clause,{bin_int,Ctx,Sz,U,Fs,Val,Es},B},i=I,vdb=Vdb},
-	       Ivar, Fail, Bef, St0) ->
-    {Mis,Int,St1} = select_extract_int(Es, Val, Sz, U, Fs, Fail,
+select_bin_seg(#k_val_clause{val=#k_bin_int{size=Sz,unit=U,flags=Fs,
+                                            val=Val,next=Next},
+                             body=B,
+                             anno=#l{i=I,vdb=Vdb}}, Ivar, Fail, Bef, St0) ->
+    Ctx = St0#cg.ctx,
+    {Mis,Int,St1} = select_extract_int(Next, Val, Sz, U, Fs, Fail,
 				       I, Vdb, Bef, Ctx, St0),
     {Bis,Aft,St2} = match_cg(B, Fail, Int, St1),
     CtxReg = fetch_var(Ctx, Bef),
@@ -784,7 +1248,7 @@ select_bin_seg(#l{ke={val_clause,{bin_int,Ctx,Sz,U,Fs,Val,Es},B},i=I,vdb=Vdb},
 	 end,
     {[{bs_restore2,CtxReg,{Ctx,Ivar}}|Is],Aft,St2}.
 
-select_extract_int([{var,Tl}], Val, {integer,Sz}, U, Fs, Vf,
+select_extract_int(#k_var{name=Tl}, Val, #k_int{val=Sz}, U, Fs, Vf,
 		   I, Vdb, Bef, Ctx, St) ->
     Bits = U*Sz,
     Bin = case member(big, Fs) of
@@ -805,7 +1269,7 @@ select_extract_int([{var,Tl}], Val, {integer,Sz}, U, Fs, Vf,
 	 end,
     {Is,clear_dead(Bef, I, Vdb),St}.
 
-select_extract_bin([{var,Hd},{var,Tl}], Size0, Unit, Type, Flags, Vf,
+select_extract_bin([#k_var{name=Hd},#k_var{name=Tl}], Size0, Unit, Type, Flags, Vf,
 		   I, Vdb, Bef, Ctx, _Body, St) ->
     SizeReg = get_bin_size_reg(Size0, Bef),
     {Es,Aft} =
@@ -828,11 +1292,11 @@ select_extract_bin([{var,Hd},{var,Tl}], Size0, Unit, Type, Flags, Vf,
 		  {bs_save2,CtxReg,{Ctx,Tl}}],Int1}
 	end,
     {Es,clear_dead(Aft, I, Vdb),St};
-select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf,
+select_extract_bin([#k_var{name=Hd}], Size, Unit, binary, Flags, Vf,
 		   I, Vdb, Bef, Ctx, Body, St) ->
     %% Match the last segment of a binary. We KNOW that the size
     %% must be 'all'.
-    Size = {atom,all},				%Assertion.
+    #k_atom{val=all} = Size,                    %Assertion.
     {Es,Aft} =
 	case vdb_find(Hd, Vdb) of
 	    {_,_,Lhd} when Lhd =< I ->
@@ -857,7 +1321,7 @@ select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf,
 			Name = bs_get_binary2,
 			Live = max_reg(Bef#sr.reg),
 			{[{test,Name,{f,Vf},Live,
-			   [CtxReg,Size,Unit,{field_flags,Flags}],Rhd}],
+			   [CtxReg,atomic(Size),Unit,{field_flags,Flags}],Rhd}],
 			 Int1};
 		    true ->
 			%% Since the matching context will not be used again,
@@ -872,43 +1336,42 @@ select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf,
 			Name = bs_get_binary2,
 			Live = max_reg(Int1#sr.reg),
 			{[{test,Name,{f,Vf},Live,
-			   [CtxReg,Size,Unit,{field_flags,Flags}],CtxReg}],
+			   [CtxReg,atomic(Size),Unit,{field_flags,Flags}],CtxReg}],
 			 Int1}
 		end
 	end,
     {Es,clear_dead(Aft, I, Vdb),St}.
 
 %% is_context_unused(Ke) -> true | false
-%%   Simple heurististic to determine whether the code that follows will
-%%   use the current matching context again. (The information of liveness
-%%   calculcated by v3_life is too conservative to be useful for this purpose.)
-%%   'true' means that the code that follows will definitely not use the context
-%%   again (because it is a block, not guard or matching code); 'false' that we
-%%   are not sure (there could be more matching).
-
-is_context_unused(#l{ke=Ke}) ->
-    is_context_unused(Ke);
-is_context_unused({alt,_First,Then}) ->
-    %% {alt,First,Then} can be used for different purposes. If the Then part
+%%   Simple heurististic to determine whether the code that follows
+%%   will use the current matching context again. (The liveness
+%%   information is too conservative to be useful for this purpose.)
+%%   'true' means that the code that follows will definitely not use
+%%   the context again (because it is a block, not guard or matching
+%%   code); 'false' that we are not sure (there could be more
+%%   matching).
+
+is_context_unused(#k_alt{then=Then}) ->
+    %% #k_alt{} can be used for different purposes. If the Then part
     %% is a block, it means that matching has finished and is used for a guard
     %% to choose between the matched clauses.
     is_context_unused(Then);
-is_context_unused({block,_}) ->
+is_context_unused(#cg_block{}) ->
     true;
 is_context_unused(_) ->
     false.
 
-select_bin_end(#l{ke={val_clause,{bin_end,Ctx},B}},
-	       Ivar, Tf, Bef, St0) ->
+select_bin_end(#k_val_clause{val=#k_bin_end{},body=B}, Ivar, Tf, Bef, St0) ->
+    Ctx = St0#cg.ctx,
     {Bis,Aft,St2} = match_cg(B, Tf, Bef, St0),
     CtxReg = fetch_var(Ctx, Bef),
     {[{bs_restore2,CtxReg,{Ctx,Ivar}},
       {test,bs_test_tail2,{f,Tf},[CtxReg,0]}|Bis],Aft,St2}.
 
-get_bin_size_reg({var,V}, Bef) ->
+get_bin_size_reg(#k_var{name=V}, Bef) ->
     fetch_var(V, Bef);
 get_bin_size_reg(Literal, _Bef) ->
-    Literal.
+    atomic(Literal).
 
 build_bs_instr(Type, Vf, CtxReg, Live, SizeReg, Unit, Flags, Rhd) ->
     {Format,Name} = case Type of
@@ -942,11 +1405,18 @@ build_skip_instr(Type, Vf, CtxReg, Live, SizeReg, Unit, Flags) ->
 	    {test,Name,{f,Vf},[CtxReg,Live,{field_flags,Flags}]}
     end.
 
-select_val(#l{ke={val_clause,{tuple,Es},B},i=I,vdb=Vdb}, V, Vf, Bef, St0) ->
+select_val(#k_val_clause{val=#k_tuple{es=Es},body=B,anno=#l{i=I,vdb=Vdb}},
+           V, Vf, Bef, St0) ->
     {Eis,Int,St1} = select_extract_tuple(V, Es, I, Vdb, Bef, St0),
     {Bis,Aft,St2} = match_cg(B, Vf, Int, St1),
     {length(Es),Eis ++ Bis,Aft,St2};
-select_val(#l{ke={val_clause,{_,Val},B}}, _V, Vf, Bef, St0) ->
+select_val(#k_val_clause{val=Val0,body=B}, _V, Vf, Bef, St0) ->
+    Val = case Val0 of
+              #k_atom{val=Lit} -> Lit;
+              #k_float{val=Lit} -> Lit;
+              #k_int{val=Lit} -> Lit;
+              #k_literal{val=Lit} -> Lit
+          end,
     {Bis,Aft,St1} = match_cg(B, Vf, Bef, St0),
     {Val,Bis,Aft,St1}.
 
@@ -955,7 +1425,7 @@ select_val(#l{ke={val_clause,{_,Val},B}}, _V, Vf, Bef, St0) ->
 %%  Extract tuple elements, but only if they do not immediately die.
 
 select_extract_tuple(Src, Vs, I, Vdb, Bef, St) ->
-    F = fun ({var,V}, {Int0,Elem}) ->
+    F = fun (#k_var{name=V}, {Int0,Elem}) ->
 		case vdb_find(V, Vdb) of
 		    {V,_,L} when L =< I -> {[], {Int0,Elem+1}};
 		    _Other ->
@@ -972,9 +1442,10 @@ select_extract_tuple(Src, Vs, I, Vdb, Bef, St) ->
 select_map(Scs, V, Tf, Vf, Bef, St0) ->
     Reg = fetch_var(V, Bef),
     {Is,Aft,St1} =
-	match_fmf(fun(#l{ke={val_clause,{map,exact,_,Es},B},i=I,vdb=Vdb}, Fail, St1) ->
-			  select_map_val(V, Es, B, Fail, I, Vdb, Bef, St1)
-		  end, Vf, St0, Scs),
+	match_fmf(fun(#k_val_clause{val=#k_map{op=exact,es=Es},
+                                    body=B,anno=#l{i=I,vdb=Vdb}}, Fail, St1) ->
+                          select_map_val(V, Es, B, Fail, I, Vdb, Bef, St1)
+                  end, Vf, St0, Scs),
     {[{test,is_map,{f,Tf},[Reg]}|Is],Aft,St1}.
 
 select_map_val(V, Es, B, Fail, I, Vdb, Bef, St0) ->
@@ -991,29 +1462,32 @@ select_extract_map(Src, Vs, Fail, I, Vdb, Bef, St) ->
     %% Assume keys are term-sorted
     Rsrc = fetch_var(Src, Bef),
 
-    {{HasKs,GetVs,HasVarKs,GetVarVs},Aft} = lists:foldr(fun
-	    ({map_pair,{var,K},{var,V}},{{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) ->
-		case vdb_find(V, Vdb) of
-		    {V,_,L} when L =< I ->
-			RK = fetch_var(K,Int0),
-			{{HasKsi,GetVsi,[RK|HasVarVsi],GetVarVsi},Int0};
-		    _Other ->
-			Reg1 = put_reg(V, Int0#sr.reg),
-			Int1 = Int0#sr{reg=Reg1},
-			RK = fetch_var(K,Int0),
-			RV = fetch_reg(V,Reg1),
-			{{HasKsi,GetVsi,HasVarVsi,[[RK,RV]|GetVarVsi]},Int1}
-		end;
-	    ({map_pair,Key,{var,V}},{{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) ->
-		case vdb_find(V, Vdb) of
-		    {V,_,L} when L =< I ->
-			{{[Key|HasKsi],GetVsi,HasVarVsi,GetVarVsi},Int0};
-		    _Other ->
-			Reg1 = put_reg(V, Int0#sr.reg),
-			Int1 = Int0#sr{reg=Reg1},
-			{{HasKsi,[Key,fetch_reg(V, Reg1)|GetVsi],HasVarVsi,GetVarVsi},Int1}
-		end
-	end, {{[],[],[],[]},Bef}, Vs),
+    {{HasKs,GetVs,HasVarKs,GetVarVs},Aft} =
+        foldr(fun(#k_map_pair{key=#k_var{name=K},val=#k_var{name=V}},
+                  {{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) ->
+                      case vdb_find(V, Vdb) of
+                          {V,_,L} when L =< I ->
+                              RK = fetch_var(K,Int0),
+                              {{HasKsi,GetVsi,[RK|HasVarVsi],GetVarVsi},Int0};
+                          _Other ->
+                              Reg1 = put_reg(V, Int0#sr.reg),
+                              Int1 = Int0#sr{reg=Reg1},
+                              RK = fetch_var(K,Int0),
+                              RV = fetch_reg(V,Reg1),
+                              {{HasKsi,GetVsi,HasVarVsi,[[RK,RV]|GetVarVsi]},Int1}
+                      end;
+                 (#k_map_pair{key=Key,val=#k_var{name=V}},
+                  {{HasKsi,GetVsi,HasVarVsi,GetVarVsi},Int0}) ->
+                      case vdb_find(V, Vdb) of
+                          {V,_,L} when L =< I ->
+                              {{[atomic(Key)|HasKsi],GetVsi,HasVarVsi,GetVarVsi},Int0};
+                          _Other ->
+                              Reg1 = put_reg(V, Int0#sr.reg),
+                              Int1 = Int0#sr{reg=Reg1},
+                              {{HasKsi,[atomic(Key),fetch_reg(V, Reg1)|GetVsi],
+                                HasVarVsi,GetVarVsi},Int1}
+                      end
+              end, {{[],[],[],[]},Bef}, Vs),
 
     Code = [{test,has_map_fields,{f,Fail},Rsrc,{list,HasKs}} || HasKs =/= []] ++
 	   [{test,has_map_fields,{f,Fail},Rsrc,{list,[K]}}   || K <- HasVarKs] ++
@@ -1022,30 +1496,36 @@ select_extract_map(Src, Vs, Fail, I, Vdb, Bef, St) ->
     {Code, Aft, St}.
 
 
-select_extract_cons(Src, [{var,Hd}, {var,Tl}], I, Vdb, Bef, St) ->
-    {Es,Aft} = case {vdb_find(Hd, Vdb), vdb_find(Tl, Vdb)} of
-		   {{_,_,Lhd}, {_,_,Ltl}} when Lhd =< I, Ltl =< I ->
-		       %% Both head and tail are dead.  No need to generate
-		       %% any instruction.
-		       {[], Bef};
-		   _ ->
-		       %% At least one of head and tail will be used,
-		       %% but we must always fetch both.  We will call
-		       %% clear_dead/2 to allow reuse of the register
-		       %% in case only of them is used.
-
-		       Reg0 = put_reg(Tl, put_reg(Hd, Bef#sr.reg)),
-		       Int0 = Bef#sr{reg=Reg0},
-		       Rsrc = fetch_var(Src, Int0),
-		       Rhd = fetch_reg(Hd, Reg0),
-		       Rtl = fetch_reg(Tl, Reg0),
-		       Int1 = clear_dead(Int0, I, Vdb),
-		       {[{get_list,Rsrc,Rhd,Rtl}], Int1}
-	       end,
-    {Es,Aft,St}.
-    
+select_extract_cons(Src, [#k_var{name=Hd},#k_var{name=Tl}], I, Vdb, Bef, St) ->
+    Rsrc = fetch_var(Src, Bef),
+    Int = clear_dead(Bef, I, Vdb),
+    {{_,_,Lhd},{_,_,Ltl}} = {vdb_find(Hd, Vdb),vdb_find(Tl, Vdb)},
+    case {Lhd =< I, Ltl =< I} of
+        {true,true} ->
+            %% Both dead.
+            {[],Bef,St};
+        {true,false} ->
+            %% Head dead.
+            Reg0 = put_reg(Tl, Bef#sr.reg),
+            Aft = Int#sr{reg=Reg0},
+            Rtl = fetch_reg(Tl, Reg0),
+            {[{get_tl,Rsrc,Rtl}],Aft,St};
+        {false,true} ->
+            %% Tail dead.
+            Reg0 = put_reg(Hd, Bef#sr.reg),
+            Aft = Int#sr{reg=Reg0},
+            Rhd = fetch_reg(Hd, Reg0),
+            {[{get_hd,Rsrc,Rhd}],Aft,St};
+        {false,false} ->
+            %% Both used.
+            Reg0 = put_reg(Tl, put_reg(Hd, Bef#sr.reg)),
+            Aft = Bef#sr{reg=Reg0},
+            Rhd = fetch_reg(Hd, Reg0),
+            Rtl = fetch_reg(Tl, Reg0),
+            {[{get_hd,Rsrc,Rhd},{get_tl,Rsrc,Rtl}],Aft,St}
+    end.
 
-guard_clause_cg(#l{ke={guard_clause,G,B},vdb=Vdb}, Fail, Bef, St0) ->
+guard_clause_cg(#k_guard_clause{anno=#l{vdb=Vdb},guard=G,body=B}, Fail, Bef, St0) ->
     {Gis,Int,St1} = guard_cg(G, Fail, Vdb, Bef, St0),
     {Bis,Aft,St} = match_cg(B, Fail, Int, St1),
     {Gis ++ Bis,Aft,St}.
@@ -1058,11 +1538,11 @@ guard_clause_cg(#l{ke={guard_clause,G,B},vdb=Vdb}, Fail, Bef, St0) ->
 %%  the correct exit point.  Primops and tests all go to the next
 %%  instruction on success or jump to a failure label.
 
-guard_cg(#l{ke={protected,Ts,Rs},i=I,vdb=Pdb}, Fail, _Vdb, Bef, St) ->
-    protected_cg(Ts, Rs, Fail, I, Pdb, Bef, St);
-guard_cg(#l{ke={block,Ts},i=I,vdb=Bdb}, Fail, _Vdb, Bef, St) ->
-    guard_cg_list(Ts, Fail, I, Bdb, Bef, St);
-guard_cg(#l{ke={test,Test,As,Inverted},i=I,vdb=_Tdb}, Fail, Vdb, Bef, St0) ->
+guard_cg(#k_protected{arg=Ts,ret=Rs,anno=#l{vdb=Pdb}}, Fail, _Vdb, Bef, St) ->
+    protected_cg(Ts, Rs, Fail, Pdb, Bef, St);
+guard_cg(#k_test{anno=#l{i=I},op=Test0,args=As,inverted=Inverted},
+         Fail, Vdb, Bef, St0) ->
+    #k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=Test}} = Test0,
     case Inverted of
 	false ->
 	    test_cg(Test, As, Fail, I, Vdb, Bef, St0);
@@ -1077,6 +1557,18 @@ guard_cg(G, _Fail, Vdb, Bef, St) ->
     %%ok = io:fwrite("cg ~w: ~p~n", [?LINE,{Aft}]),
     {Gis,Aft,St1}.
 
+%% guard_cg_list([Kexpr], Fail, I, Vdb, StackReg, St) ->
+%%      {[Ainstr],StackReg,St}.
+
+guard_cg_list(Kes, Fail, Vdb, Bef, St0) ->
+    {Keis,{Aft,St1}} =
+	flatmapfoldl(fun (Ke, {Inta,Sta}) ->
+			     {Keis,Intb,Stb} =
+				 guard_cg(Ke, Fail, Vdb, Inta, Sta),
+			     {Keis,{Intb,Stb}}
+		     end, {Bef,St0}, need_heap(Kes)),
+    {Keis,Aft,St1}.
+
 %% protected_cg([Kexpr], [Ret], Fail, I, Vdb, Bef, St) -> {[Ainstr],Aft,St}.
 %%  Do a protected.  Protecteds without return values are just done
 %%  for effect, the return value is not checked, success passes on to
@@ -1084,19 +1576,18 @@ guard_cg(G, _Fail, Vdb, Bef, St) ->
 %%  return values then these must be set to 'false' on failure,
 %%  control always passes to the next instruction.
 
-protected_cg(Ts, [], Fail, I, Vdb, Bef, St0) ->
+protected_cg(Ts, [], Fail, Vdb, Bef, St0) ->
     %% Protect these calls, revert when done.
-    {Tis,Aft,St1} = guard_cg_list(Ts, Fail, I, Vdb, Bef,
-				  St0#cg{bfail=Fail}),
+    {Tis,Aft,St1} = guard_cg_list(Ts, Fail, Vdb, Bef, St0#cg{bfail=Fail}),
     {Tis,Aft,St1#cg{bfail=St0#cg.bfail}};
-protected_cg(Ts, Rs, _Fail, I, Vdb, Bef, St0) ->
+protected_cg(Ts, Rs, _Fail, Vdb, Bef, St0) ->
     {Pfail,St1} = new_label(St0),
     {Psucc,St2} = new_label(St1),
-    {Tis,Aft,St3} = guard_cg_list(Ts, Pfail, I, Vdb, Bef,
+    {Tis,Aft,St3} = guard_cg_list(Ts, Pfail, Vdb, Bef,
 				  St2#cg{bfail=Pfail}),
     %%ok = io:fwrite("cg ~w: ~p~n", [?LINE,{Rs,I,Vdb,Aft}]),
     %% Set return values to false.
-    Mis = [{move,{atom,false},fetch_var(V,Aft)}||{var,V} <- Rs],
+    Mis = [{move,{atom,false},fetch_var(V,Aft)}||#k_var{name=V} <- Rs],
     {Tis ++ [{jump,{f,Psucc}},
 	     {label,Pfail}] ++ Mis ++ [{label,Psucc}],
      Aft,St3#cg{bfail=St0#cg.bfail}}.    
@@ -1121,7 +1612,7 @@ test_cg(is_map, [A], Fail, I, Vdb, Bef, St) ->
     Arg = cg_reg_arg_prefer_y(A, Bef),
     Aft = clear_dead(Bef, I, Vdb),
     {[{test,is_map,{f,Fail},[Arg]}],Aft,St};
-test_cg(is_boolean, [{atom,Val}], Fail, I, Vdb, Bef, St) ->
+test_cg(is_boolean, [#k_atom{val=Val}], Fail, I, Vdb, Bef, St) ->
     Aft = clear_dead(Bef, I, Vdb),
     Is = case is_boolean(Val) of
 	     true -> [];
@@ -1133,18 +1624,6 @@ test_cg(Test, As, Fail, I, Vdb, Bef, St) ->
     Aft = clear_dead(Bef, I, Vdb),
     {[beam_utils:bif_to_test(Test, Args, {f,Fail})],Aft,St}.
 
-%% guard_cg_list([Kexpr], Fail, I, Vdb, StackReg, St) ->
-%%      {[Ainstr],StackReg,St}.
-
-guard_cg_list(Kes, Fail, I, Vdb, Bef, St0) ->
-    {Keis,{Aft,St1}} =
-	flatmapfoldl(fun (Ke, {Inta,Sta}) ->
-			     {Keis,Intb,Stb} =
-				 guard_cg(Ke, Fail, Vdb, Inta, Sta),
-			     {Keis,{Intb,Stb}}
-		     end, {Bef,St0}, need_heap(Kes, I)),
-    {Keis,Aft,St1}.
-
 %% match_fmf(Fun, LastFail, State, [Clause]) -> {Is,Aft,State}.
 %%  This is a special flatmapfoldl for match code gen where we
 %%  generate a "failure" label for each clause. The last clause uses
@@ -1167,7 +1646,7 @@ match_fmf(F, LastFail, St0, [H|T]) ->
 %%  frame size. Finally the actual call is made.  Call then needs the
 %%  return values filled in.
 
-call_cg({var,_V} = Var, As, Rs, Le, Vdb, Bef, St0) ->
+call_cg(#k_var{}=Var, As, Rs, Le, Vdb, Bef, St0) ->
     {Sis,Int} = cg_setup_call(As++[Var], Bef, Le#l.i, Vdb),
     %% Put return values in registers.
     Reg = load_vars(Rs, clear_regs(Int#sr.reg)),
@@ -1176,9 +1655,8 @@ call_cg({var,_V} = Var, As, Rs, Le, Vdb, Bef, St0) ->
     {Frees,Aft} = free_dead(clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb)),
     {Sis ++ Frees ++ [line(Le),{call_fun,Arity}],Aft,
      need_stack_frame(St0)};
-call_cg({remote,Mod,Name}, As, Rs, Le, Vdb, Bef, St0)
-  when element(1, Mod) =:= var;
-       element(1, Name) =:= var ->
+call_cg(#k_remote{mod=Mod,name=Name}, As, Rs, Le, Vdb, Bef, St0)
+  when is_record(Mod, k_var); is_record(Name, k_var) ->
     {Sis,Int} = cg_setup_call(As++[Mod,Name], Bef, Le#l.i, Vdb),
     %% Put return values in registers.
     Reg = load_vars(Rs, clear_regs(Int#sr.reg)),
@@ -1196,8 +1674,9 @@ call_cg(Func, As, Rs, Le, Vdb, Bef, St0) ->
 	    %%
 	    %%     move {atom,ok} DestReg
 	    %%     jump FailureLabel
-	    {remote,{atom,erlang},{atom,error}} = Func,	%Assertion.
-	    [{var,DestVar}] = Rs,
+	    #k_remote{mod=#k_atom{val=erlang},
+                      name=#k_atom{val=error}} = Func, %Assertion.
+	    [#k_var{name=DestVar}] = Rs,
 	    Int0 = clear_dead(Bef, Le#l.i, Vdb),
 	    Reg = put_reg(DestVar, Int0#sr.reg),
 	    Int = Int0#sr{reg=Reg},
@@ -1216,11 +1695,11 @@ call_cg(Func, As, Rs, Le, Vdb, Bef, St0) ->
 	    {Sis ++ Frees ++ [line(Le)|Call],Aft,St1}
     end.
 
-build_call({remote,{atom,erlang},{atom,'!'}}, 2, St0) ->
+build_call(#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val='!'}}, 2, St0) ->
     {[send],need_stack_frame(St0)};
-build_call({remote,{atom,Mod},{atom,Name}}, Arity, St0) ->
+build_call(#k_remote{mod=#k_atom{val=Mod},name=#k_atom{val=Name}}, Arity, St0) ->
     {[{call_ext,Arity,{extfunc,Mod,Name,Arity}}],need_stack_frame(St0)};
-build_call(Name, Arity, St0) when is_atom(Name) ->
+build_call(#k_local{name=Name}, Arity, St0) when is_atom(Name) ->
     {Lbl,St1} = local_func_label(Name, Arity, need_stack_frame(St0)),
     {[{call,Arity,{f,Lbl}}],St1}.
 
@@ -1236,16 +1715,15 @@ free_dead([Any|Stk], Y, Instr, StkAcc) ->
     free_dead(Stk, Y+1, Instr, [Any|StkAcc]);
 free_dead([], _, Instr, StkAcc) -> {Instr,reverse(StkAcc)}.
 
-enter_cg({var,_V} = Var, As, Le, Vdb, Bef, St0) ->
+enter_cg(#k_var{} = Var, As, Le, Vdb, Bef, St0) ->
     {Sis,Int} = cg_setup_call(As++[Var], Bef, Le#l.i, Vdb),
     %% Build complete code and final stack/register state.
     Arity = length(As),
     {Sis ++ [line(Le),{call_fun,Arity},return],
      clear_dead(Int#sr{reg=clear_regs(Int#sr.reg)}, Le#l.i, Vdb),
      need_stack_frame(St0)};
-enter_cg({remote,Mod,Name}, As, Le, Vdb, Bef, St0)
-  when element(1, Mod) =:= var;
-       element(1, Name) =:= var ->
+enter_cg(#k_remote{mod=Mod,name=Name}, As, Le, Vdb, Bef, St0)
+  when is_record(Mod, k_var); is_record(Name, k_var) ->
     {Sis,Int} = cg_setup_call(As++[Mod,Name], Bef, Le#l.i, Vdb),
     %% Build complete code and final stack/register state.
     Arity = length(As),
@@ -1263,19 +1741,19 @@ enter_cg(Func, As, Le, Vdb, Bef, St0) ->
      clear_dead(Int#sr{reg=clear_regs(Int#sr.reg)}, Le#l.i, Vdb),
      St1}.
 
-build_enter({remote,{atom,erlang},{atom,'!'}}, 2, St0) ->
+build_enter(#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val='!'}}, 2, St0) ->
     {[send,return],need_stack_frame(St0)};
-build_enter({remote,{atom,Mod},{atom,Name}}, Arity, St0) ->
+build_enter(#k_remote{mod=#k_atom{val=Mod},name=#k_atom{val=Name}}, Arity, St0) ->
     St1 = case trap_bif(Mod, Name, Arity) of
 	      true -> need_stack_frame(St0);
 	      false -> St0
 	  end,
     {[{call_ext_only,Arity,{extfunc,Mod,Name,Arity}}],St1};
-build_enter(Name, Arity, St0) when is_atom(Name) ->
+build_enter(#k_local{name=Name}, Arity, St0) when is_atom(Name) ->
     {Lbl,St1} = local_func_label(Name, Arity, St0),
     {[{call_only,Arity,{f,Lbl}}],St1}.
 
-enter_line({remote,{atom,Mod},{atom,Name}}, Arity, Le) ->
+enter_line(#k_remote{mod=#k_atom{val=Mod},name=#k_atom{val=Name}}, Arity, Le) ->
     case erl_bifs:is_safe(Mod, Name, Arity) of
 	false ->
 	    %% Tail-recursive call, possibly to a BIF.
@@ -1323,17 +1801,28 @@ trap_bif(erlang, group_leader, 2) -> true;
 trap_bif(erlang, exit, 2) -> true;
 trap_bif(_, _, _) -> false.
 
+%% bif_cg(#k_bif{}, Le, Vdb, StackReg, State) ->
+%%      {[Ainstr],StackReg,State}.
+%%  Generate code a BIF.
+
+bif_cg(#k_bif{op=#k_internal{name=Name},args=As,ret=Rs}, Le, Vdb, Bef, St) ->
+    internal_cg(Name, As, Rs, Le, Vdb, Bef, St);
+bif_cg(#k_bif{op=#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=Name}},
+              args=As,ret=Rs}, Le, Vdb, Bef, St) ->
+    Ar = length(As),
+    case is_gc_bif(Name, Ar) of
+	false ->
+            bif_cg(Name, As, Rs, Le, Vdb, Bef, St);
+	true ->
+            gc_bif_cg(Name, As, Rs, Le, Vdb, Bef, St)
+    end.
+
 %% internal_cg(Bif, [Arg], [Ret], Le, Vdb, StackReg, State) ->
 %%      {[Ainstr],StackReg,State}.
 
 internal_cg(bs_context_to_binary=Instr, [Src0], [], Le, Vdb, Bef, St0) ->
     [Src] = cg_reg_args([Src0], Bef),
-    case is_register(Src) of
-	false ->
-	    {[],clear_dead(Bef, Le#l.i, Vdb), St0};
-	true ->
-	    {[{Instr,Src}],clear_dead(Bef, Le#l.i, Vdb), St0}
-    end;
+    {[{Instr,Src}],clear_dead(Bef, Le#l.i, Vdb), St0};
 internal_cg(dsetelement, [Index0,Tuple0,New0], _Rs, Le, Vdb, Bef, St0) ->
     [New,Tuple,{integer,Index1}] = cg_reg_args([New0,Tuple0,Index0], Bef),
     Index = Index1-1,
@@ -1341,8 +1830,8 @@ internal_cg(dsetelement, [Index0,Tuple0,New0], _Rs, Le, Vdb, Bef, St0) ->
      clear_dead(Bef, Le#l.i, Vdb), St0};
 internal_cg(make_fun, [Func0,Arity0|As], Rs, Le, Vdb, Bef, St0) ->
     %% This behaves more like a function call.
-    {atom,Func} = Func0,
-    {integer,Arity} = Arity0,
+    #k_atom{val=Func} = Func0,
+    #k_int{val=Arity} = Arity0,
     {Sis,Int} = cg_setup_call(As, Bef, Le#l.i, Vdb),
     Reg = load_vars(Rs, clear_regs(Int#sr.reg)),
     {FuncLbl,St1} = local_func_label(Func, Arity, St0),
@@ -1355,14 +1844,35 @@ internal_cg(bs_init_writable=I, As, Rs, Le, Vdb, Bef, St) ->
     {Sis,Int} = cg_setup_call(As, Bef, Le#l.i, Vdb),
     Reg = load_vars(Rs, clear_regs(Int#sr.reg)),
     {Sis++[I],clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb),St};
+internal_cg(build_stacktrace=I, As, Rs, Le, Vdb, Bef, St) ->
+    %% This behaves like a function call.
+    {Sis,Int} = cg_setup_call(As, Bef, Le#l.i, Vdb),
+    Reg = load_vars(Rs, clear_regs(Int#sr.reg)),
+    {Sis++[I],clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb),St};
 internal_cg(raise, As, Rs, Le, Vdb, Bef, St) ->
     %% raise can be treated like a guard BIF.
-    bif_cg(raise, As, Rs, Le, Vdb, Bef, St).
+    bif_cg(raise, As, Rs, Le, Vdb, Bef, St);
+internal_cg(guard_error, [ExitCall], _Rs, Le, Vdb, Bef, St) ->
+    %% A call an exit BIF from inside a #k_guard_match{}.
+    %% Generate a standard call, but leave the register descriptors
+    %% alone, effectively pretending that there was no call.
+    #k_call{op=#k_remote{mod=#k_atom{val=Mod},name=#k_atom{val=Name}},
+            args=As} = ExitCall,
+    Arity = length(As),
+    {Ms,_} = cg_call_args(As, Bef, Le#l.i, Vdb),
+    Call = {call_ext,Arity,{extfunc,Mod,Name,Arity}},
+    Is = Ms++[line(Le),Call],
+    {Is,Bef,St};
+internal_cg(raw_raise=I, As, Rs, Le, Vdb, Bef, St) ->
+    %% This behaves like a function call.
+    {Sis,Int} = cg_setup_call(As, Bef, Le#l.i, Vdb),
+    Reg = load_vars(Rs, clear_regs(Int#sr.reg)),
+    {Sis++[I],clear_dead(Int#sr{reg=Reg}, Le#l.i, Vdb),St}.
 
 %% bif_cg(Bif, [Arg], [Ret], Le, Vdb, StackReg, State) ->
 %%      {[Ainstr],StackReg,State}.
 
-bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) ->
+bif_cg(Bif, As, [#k_var{name=V}], Le, Vdb, Bef, St0) ->
     Ars = cg_reg_args(As, Bef),
 
     %% If we are inside a catch and in a body (not in guard) and the
@@ -1400,7 +1910,7 @@ bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) ->
 %% gc_bif_cg(Bif, [Arg], [Ret], Le, Vdb, StackReg, State) ->
 %%      {[Ainstr],StackReg,State}.
 
-gc_bif_cg(Bif, As, [{var,V}], Le, Vdb, Bef, St0) ->
+gc_bif_cg(Bif, As, [#k_var{name=V}], Le, Vdb, Bef, St0) ->
     Ars = cg_reg_args(As, Bef),
 
     %% If we are inside a catch and in a body (not in guard) and the
@@ -1446,7 +1956,7 @@ recv_loop_cg(Te, Rvar, Rm, Tes, Rs, Le, Vdb, Bef, St0) ->
 
 %% cg_recv_mesg( ) -> {[Ainstr],Aft,St}.
 
-cg_recv_mesg({var,R}, Rm, Tl, Bef, St0) ->
+cg_recv_mesg(#k_var{name=R}, Rm, Tl, Bef, St0) ->
     Int0 = Bef#sr{reg=put_reg(R, Bef#sr.reg)},
     Ret = fetch_reg(R, Int0#sr.reg),
     %% Int1 = clear_dead(Int0, I, Rm#l.vdb),
@@ -1456,22 +1966,22 @@ cg_recv_mesg({var,R}, Rm, Tl, Bef, St0) ->
 
 %% cg_recv_wait(Te, Tes, I, Vdb, Int2, St3) -> {[Ainstr],Aft,St}.
 
-cg_recv_wait({atom,infinity}, Tes, I, Bef, St0) ->
+cg_recv_wait(#k_atom{val=infinity}, #cg_block{anno=Le,es=Tes}, I, Bef, St0) ->
     %% We know that the 'after' body will never be executed.
     %% But to keep the stack and register information up to date,
     %% we will generate the code for the 'after' body, and then discard it.
-    Int1 = clear_dead(Bef, I, Tes#l.vdb),
-    {_,Int2,St1} = cg_block(Tes#l.ke, Tes#l.i, Tes#l.vdb,
-			      Int1#sr{reg=clear_regs(Int1#sr.reg)}, St0),
+    Int1 = clear_dead(Bef, I, Le#l.vdb),
+    {_,Int2,St1} = cg_block(Tes, Le#l.vdb,
+                            Int1#sr{reg=clear_regs(Int1#sr.reg)}, St0),
     {[{wait,{f,St1#cg.recv}}],Int2,St1};
-cg_recv_wait({integer,0}, Tes, _I, Bef, St0) ->
-    {Tis,Int,St1} = cg_block(Tes#l.ke, Tes#l.i, Tes#l.vdb, Bef, St0),
+cg_recv_wait(#k_int{val=0}, #cg_block{anno=Le,es=Tes}, _I, Bef, St0) ->
+    {Tis,Int,St1} = cg_block(Tes, Le#l.vdb, Bef, St0),
     {[timeout|Tis],Int,St1};
-cg_recv_wait(Te, Tes, I, Bef, St0) ->
+cg_recv_wait(Te, #cg_block{anno=Le,es=Tes}, I, Bef, St0) ->
     Reg = cg_reg_arg(Te, Bef),
     %% Must have empty registers here!  Bug if anything in registers.
-    Int0 = clear_dead(Bef, I, Tes#l.vdb),
-    {Tis,Int,St1} = cg_block(Tes#l.ke, Tes#l.i, Tes#l.vdb,
+    Int0 = clear_dead(Bef, I, Le#l.vdb),
+    {Tis,Int,St1} = cg_block(Tes, Le#l.vdb,
 			     Int0#sr{reg=clear_regs(Int0#sr.reg)}, St0),
     {[{wait_timeout,{f,St1#cg.recv},Reg},timeout] ++ Tis,Int,St1}.
 
@@ -1489,7 +1999,7 @@ try_cg(Ta, Vs, Tb, Evs, Th, Rs, Le, Vdb, Bef, St0) ->
     {B,St1} = new_label(St0),			%Body label
     {H,St2} = new_label(St1),			%Handler label
     {E,St3} = new_label(St2),			%End label
-    TryTag = Ta#l.i,
+    #l{i=TryTag} = get_kanno(Ta),
     Int1 = Bef#sr{stk=put_catch(TryTag, Bef#sr.stk)},
     TryReg = fetch_stack({catch_tag,TryTag}, Int1#sr.stk),
     {Ais,Int2,St4} = cg(Ta, Vdb, Int1, St3#cg{break=B,in_catch=true}),
@@ -1509,7 +2019,7 @@ try_cg(Ta, Vs, Tb, Evs, Th, Rs, Le, Vdb, Bef, St0) ->
 try_enter_cg(Ta, Vs, Tb, Evs, Th, Le, Vdb, Bef, St0) ->
     {B,St1} = new_label(St0),			%Body label
     {H,St2} = new_label(St1),			%Handler label
-    TryTag = Ta#l.i,
+    #l{i=TryTag} = get_kanno(Ta),
     Int1 = Bef#sr{stk=put_catch(TryTag, Bef#sr.stk)},
     TryReg = fetch_stack({catch_tag,TryTag}, Int1#sr.stk),
     {Ais,Int2,St3} = cg(Ta, Vdb, Int1, St2#cg{break=B,in_catch=true}),
@@ -1527,12 +2037,12 @@ try_enter_cg(Ta, Vs, Tb, Evs, Th, Le, Vdb, Bef, St0) ->
 
 %% catch_cg(CatchBlock, Ret, Le, Vdb, Bef, St) -> {[Ainstr],Aft,St}.
 
-catch_cg(C, {var,R}, Le, Vdb, Bef, St0) ->
+catch_cg(#cg_block{es=C}, #k_var{name=R}, Le, Vdb, Bef, St0) ->
     {B,St1} = new_label(St0),
     CatchTag = Le#l.i,
     Int1 = Bef#sr{stk=put_catch(CatchTag, Bef#sr.stk)},
     CatchReg = fetch_stack({catch_tag,CatchTag}, Int1#sr.stk),
-    {Cis,Int2,St2} = cg_block(C, Le#l.i, Le#l.vdb, Int1,
+    {Cis,Int2,St2} = cg_block(C, Le#l.vdb, Int1,
 			      St1#cg{break=B,in_catch=true}),
     [] = Int2#sr.reg,				%Assertion.
     Aft = Int2#sr{reg=[{0,R}],stk=drop_catch(CatchTag, Int2#sr.stk)},
@@ -1541,8 +2051,8 @@ catch_cg(C, {var,R}, Le, Vdb, Bef, St0) ->
      clear_dead(Aft, Le#l.i, Vdb),
      St2#cg{break=St1#cg.break,in_catch=St1#cg.in_catch}}.
 
-%% set_cg([Var], Constr, Le, Vdb, Bef, St) -> {[Ainstr],Aft,St}.
-%%  We have to be careful how a 'set' works. First the structure is
+%% put_cg([Var], Constr, Le, Vdb, Bef, St) -> {[Ainstr],Aft,St}.
+%%  We have to be careful how a 'put' works. First the structure is
 %%  built, then it is filled and finally things can be cleared. The
 %%  annotation must reflect this and make sure that the return
 %%  variable is allocated first.
@@ -1550,13 +2060,14 @@ catch_cg(C, {var,R}, Le, Vdb, Bef, St0) ->
 %%  put_list and put_map are atomic instructions, both of
 %%  which can safely resuse one of the source registers as target.
 
-set_cg([{var,R}], {cons,Es}, Le, Vdb, Bef, St) ->
-    [S1,S2] = cg_reg_args(Es, Bef),
+put_cg([#k_var{name=R}], #k_cons{hd=Hd,tl=Tl}, Le, Vdb, Bef, St) ->
+    [S1,S2] = cg_reg_args([Hd,Tl], Bef),
     Int0 = clear_dead(Bef, Le#l.i, Vdb),
     Int1 = Int0#sr{reg=put_reg(R, Int0#sr.reg)},
     Ret = fetch_reg(R, Int1#sr.reg),
     {[{put_list,S1,S2,Ret}], Int1, St};
-set_cg([{var,R}], {binary,Segs}, Le, Vdb, Bef, #cg{bfail=Bfail}=St) ->
+put_cg([#k_var{name=R}], #k_binary{segs=Segs}, Le, Vdb, Bef,
+       #cg{bfail=Bfail}=St) ->
     %% At run-time, binaries are constructed in three stages:
     %% 1) First the size of the binary is calculated.
     %% 2) Then the binary is allocated.
@@ -1584,7 +2095,9 @@ set_cg([{var,R}], {binary,Segs}, Le, Vdb, Bef, #cg{bfail=Bfail}=St) ->
     {Sis++Code,Aft,St};
 
 %% Map: single variable key.
-set_cg([{var,R}], {map,Op,Map,[{map_pair,{var,_}=K,V}]}, Le, Vdb, Bef, St0) ->
+put_cg([#k_var{name=R}], #k_map{op=Op,var=Map,
+                                es=[#k_map_pair{key=#k_var{}=K,val=V}]},
+       Le, Vdb, Bef, St0) ->
     {Sis,Int0} = maybe_adjust_stack(Bef, Le#l.i, Le#l.i+1, Vdb, St0),
 
     SrcReg = cg_reg_arg_prefer_y(Map, Int0),
@@ -1599,22 +2112,23 @@ set_cg([{var,R}], {map,Op,Map,[{map_pair,{var,_}=K,V}]}, Le, Vdb, Bef, St0) ->
     Aft = Aft0#sr{reg=put_reg(R, Aft0#sr.reg)},
     Target = fetch_reg(R, Aft#sr.reg),
 
-    {Is,St1} = set_cg_map(Line, Op, SrcReg, Target, Live, List, St0),
+    {Is,St1} = put_cg_map(Line, Op, SrcReg, Target, Live, List, St0),
     {Sis++Is,Aft,St1};
 
 %% Map: (possibly) multiple literal keys.
-set_cg([{var,R}], {map,Op,Map,Es}, Le, Vdb, Bef, St0) ->
+put_cg([#k_var{name=R}], #k_map{op=Op,var=Map,es=Es}, Le, Vdb, Bef, St0) ->
 
     %% assert key literals
-    [] = [Var||{map_pair,{var,_}=Var,_} <- Es],
+    [] = [Var || #k_map_pair{key=#k_var{}=Var} <- Es],
 
     {Sis,Int0} = maybe_adjust_stack(Bef, Le#l.i, Le#l.i+1, Vdb, St0),
     SrcReg = cg_reg_arg_prefer_y(Map, Int0),
     Line = line(Le#l.a),
 
     %% fetch registers for values to be put into the map
-    Pairs = [{K,V} || {_,K,V} <- Es],
-    List = flatmap(fun({K,V}) -> [K,cg_reg_arg(V,Int0)] end, Pairs),
+    List = flatmap(fun(#k_map_pair{key=K,val=V}) ->
+                           [atomic(K),cg_reg_arg(V, Int0)]
+                   end, Es),
 
     Live = max_reg(Bef#sr.reg),
 
@@ -1623,16 +2137,16 @@ set_cg([{var,R}], {map,Op,Map,Es}, Le, Vdb, Bef, St0) ->
     Aft = Aft0#sr{reg=put_reg(R, Aft0#sr.reg)},
     Target = fetch_reg(R, Aft#sr.reg),
 
-    {Is,St1} = set_cg_map(Line, Op, SrcReg, Target, Live, List, St0),
+    {Is,St1} = put_cg_map(Line, Op, SrcReg, Target, Live, List, St0),
     {Sis++Is,Aft,St1};
 
 %% Everything else.
-set_cg([{var,R}], Con, Le, Vdb, Bef, St) ->
+put_cg([#k_var{name=R}], Con, Le, Vdb, Bef, St) ->
     %% Find a place for the return register first.
     Int = Bef#sr{reg=put_reg(R, Bef#sr.reg)},
     Ret = fetch_reg(R, Int#sr.reg),
     Ais = case Con of
-	      {tuple,Es} ->
+	      #k_tuple{es=Es} ->
 		  [{put_tuple,length(Es),Ret}] ++ cg_build_args(Es, Bef);
 	      Other ->
 		  [{move,cg_reg_arg(Other, Int),Ret}]
@@ -1640,7 +2154,7 @@ set_cg([{var,R}], Con, Le, Vdb, Bef, St) ->
     {Ais,clear_dead(Int, Le#l.i, Vdb),St}.
 
 
-set_cg_map(Line, Op0, SrcReg, Target, Live, List, St0) ->
+put_cg_map(Line, Op0, SrcReg, Target, Live, List, St0) ->
     Bfail = St0#cg.bfail,
     Fail = {f,St0#cg.bfail},
     Op = case Op0 of
@@ -1854,7 +2368,8 @@ cg_bin_opt_1([I|Is]) ->
 cg_bin_opt_1([]) ->
     [].
 
-cg_bin_put({bin_seg,[],S0,U,T,Fs,[E0,Next]}, Fail, Bef) ->
+cg_bin_put(#k_bin_seg{size=S0,unit=U,type=T,flags=Fs,seg=E0,next=Next},
+           Fail, Bef) ->
     S1 = cg_reg_arg(S0, Bef),
     E1 = cg_reg_arg(E0, Bef),
     {Format,Op} = case T of
@@ -1871,7 +2386,7 @@ cg_bin_put({bin_seg,[],S0,U,T,Fs,[E0,Next]}, Fail, Bef) ->
 	utf ->
 	    [{Op,Fail,{field_flags,Fs},E1}|cg_bin_put(Next, Fail, Bef)]
     end;
-cg_bin_put({bin_end,[]}, _, _) -> [].
+cg_bin_put(#k_bin_end{}, _, _) -> [].
 
 cg_build_args(As, Bef) ->
     [{put,cg_reg_arg(A, Bef)} || A <- As].
@@ -1891,13 +2406,12 @@ break_cg(Bs, Le, Vdb, Bef, St) ->
     {Ms ++ [{jump,{f,St#cg.break}}],
      Int#sr{reg=clear_regs(Int#sr.reg)},St}.
 
-guard_break_cg(Bs, Locked, #l{i=I}, Vdb, #sr{reg=Reg0}=Bef, St) ->
-    RegLocked = get_locked_regs(Reg0, Locked),
-    #sr{reg=Reg1} = Int = clear_dead(Bef#sr{reg=RegLocked}, I, Vdb),
+guard_break_cg(Bs, #l{i=I}, Vdb, #sr{reg=Reg0}=Bef, St) ->
+    #sr{reg=Reg1} = Int = clear_dead(Bef, I, Vdb),
     Reg2 = trim_free(Reg1),
     NumLocked = length(Reg2),
     Moves0 = gen_moves(Bs, Bef, NumLocked, []),
-    Moves = order_moves(Moves0, find_scratch_reg(RegLocked)),
+    Moves = order_moves(Moves0, find_scratch_reg(Reg0)),
     {BreakVars,_} = mapfoldl(fun(_, RegNum) ->
 				     {{RegNum,gbreakvar},RegNum+1}
 			     end, length(Reg2), Bs),
@@ -1905,31 +2419,17 @@ guard_break_cg(Bs, Locked, #l{i=I}, Vdb, #sr{reg=Reg0}=Bef, St) ->
     Aft = Int#sr{reg=Reg},
     {Moves ++ [{jump,{f,St#cg.break}}],Aft,St}.
 
-get_locked_regs([R|Rs0], Preserve) ->
-    case {get_locked_regs(Rs0, Preserve),R} of
-	{[],{_,V}} ->
-	    case lists:member(V, Preserve) of
-		true -> [R];
-		false -> []
-	    end;
-	{[],_} ->
-	    [];
-	{Rs,_} ->
-	    [R|Rs]
-    end;
-get_locked_regs([], _) -> [].
-
 %% cg_reg_arg(Arg0, Info) -> Arg
 %% cg_reg_args([Arg0], Info) -> [Arg]
 %%  Convert argument[s] into registers. Literal values are returned unchanged.
 
 cg_reg_args(As, Bef) -> [cg_reg_arg(A, Bef) || A <- As].
 
-cg_reg_arg({var,V}, Bef) -> fetch_var(V, Bef);
-cg_reg_arg(Literal, _) -> Literal.
+cg_reg_arg(#k_var{name=V}, Bef) -> fetch_var(V, Bef);
+cg_reg_arg(Literal, _) -> atomic(Literal).
 
-cg_reg_arg_prefer_y({var,V}, Bef) -> fetch_var_prefer_y(V, Bef);
-cg_reg_arg_prefer_y(Literal, _) -> Literal.
+cg_reg_arg_prefer_y(#k_var{name=V}, Bef) -> fetch_var_prefer_y(V, Bef);
+cg_reg_arg_prefer_y(Literal, _) -> atomic(Literal).
 
 %% cg_setup_call([Arg], Bef, Cur, Vdb) -> {[Instr],Aft}.
 %%  Do the complete setup for a call/enter.
@@ -1967,9 +2467,9 @@ cg_call_args(As, Bef, I, Vdb) ->
 
 load_arg_regs(Regs, As) -> load_arg_regs(Regs, As, 0).
 
-load_arg_regs([_|Rs], [{var,V}|As], I) -> [{I,V}|load_arg_regs(Rs, As, I+1)];
+load_arg_regs([_|Rs], [#k_var{name=V}|As], I) -> [{I,V}|load_arg_regs(Rs, As, I+1)];
 load_arg_regs([_|Rs], [A|As], I) -> [{I,A}|load_arg_regs(Rs, As, I+1)];
-load_arg_regs([], [{var,V}|As], I) -> [{I,V}|load_arg_regs([], As, I+1)];
+load_arg_regs([], [#k_var{name=V}|As], I) -> [{I,V}|load_arg_regs([], As, I+1)];
 load_arg_regs([], [A|As], I) -> [{I,A}|load_arg_regs([], As, I+1)];
 load_arg_regs(Rs, [], _) -> Rs.
 
@@ -2005,12 +2505,13 @@ move_unsaved([], _, Regs, Acc) -> {Acc,Regs}.
 
 gen_moves(As, Sr) -> gen_moves(As, Sr, 0, []).
 
-gen_moves([{var,V}|As], Sr, I, Acc) ->
+gen_moves([#k_var{name=V}|As], Sr, I, Acc) ->
     case fetch_var(V, Sr) of
 	{x,I} -> gen_moves(As, Sr, I+1, Acc);
 	Reg -> gen_moves(As, Sr, I+1, [{move,Reg,{x,I}}|Acc])
     end;
-gen_moves([A|As], Sr, I, Acc) ->
+gen_moves([A0|As], Sr, I, Acc) ->
+    A = atomic(A0),
     gen_moves(As, Sr, I+1, [{move,A,{x,I}}|Acc]);
 gen_moves([], _, _, Acc) -> lists:keysort(3, Acc).
 
@@ -2058,21 +2559,21 @@ break_up_cycle1(Dst, [M|Path], LastMove) ->
 %% clear_dead(Sr, Until, Vdb) -> Aft.
 %%  Remove all variables in Sr which have died AT ALL so far.
 
-clear_dead(Sr, Until, Vdb) ->
-    Sr#sr{reg=clear_dead_reg(Sr, Until, Vdb),
-	  stk=clear_dead_stk(Sr#sr.stk, Until, Vdb)}.
+clear_dead(#sr{stk=Stk}=Sr0, Until, Vdb) ->
+    Sr = Sr0#sr{reg=clear_dead_reg(Sr0, Until, Vdb),
+                stk=clear_dead_stk(Stk, Until, Vdb)},
+    reserve(Sr).
 
 clear_dead_reg(Sr, Until, Vdb) ->
-    Reg = [case R of
-            {_I,V} = IV ->
-                case vdb_find(V, Vdb) of
-                    {V,_,L} when L > Until -> IV;
-                    _ -> free		%Remove anything else
-                end;
-            {reserved,_I,_V} = Reserved -> Reserved;
-            free -> free
-        end || R <- Sr#sr.reg],
-    reserve(Sr#sr.res, Reg, Sr#sr.stk).
+    [case R of
+         {_I,V} = IV ->
+             case vdb_find(V, Vdb) of
+                 {V,_,L} when L > Until -> IV;
+                 _ -> free                      %Remove anything else
+             end;
+         {reserved,_I,_V}=Reserved -> Reserved;
+         free -> free
+     end || R <- Sr#sr.reg].
 
 clear_dead_stk(Stk, Until, Vdb) ->
     [case S of
@@ -2144,16 +2645,25 @@ adjust_stack(Bef, Fb, Lf, Vdb) ->
 
 save_stack(Stk0, Fb, Lf, Vdb) ->
     %% New variables that are in use but not on stack.
-    New = [VFL || {V,F,L} = VFL <- Vdb,
-		  F < Fb,
-		  L >= Lf,
-		  not on_stack(V, Stk0)],
+    New = new_not_on_stack(Stk0, Fb, Lf, Vdb),
+
     %% Add new variables that are not just dropped immediately.
     %% N.B. foldr works backwards from the end!!
     Saves = [V || {V,_,_} <- keysort(3, New)],
     Stk1 = foldr(fun (V, Stk) -> put_stack(V, Stk) end, Stk0, Saves),
     {Stk1,Saves}.
 
+%% new_not_on_stack(Stack, FirstBefore, LastFrom, Vdb) ->
+%%                 [{Variable,First,Last}]
+%%  Return information about all variables that are used past current
+%%  point and that are not already on the stack.
+
+new_not_on_stack(Stk, Fb, Lf, Vdb) ->
+    [VFL || {V,F,L} = VFL <- Vdb,
+            F < Fb,
+            L >= Lf,
+            not on_stack(V, Stk)].
+
 %% saves([SaveVar], Reg, Stk) -> [{move,Reg,Stk}].
 %%  Generate move instructions to save variables onto stack.  The
 %%  stack/reg info used is that after the new stack has been made.
@@ -2179,7 +2689,7 @@ fetch_var_prefer_y(V, #sr{reg=Reg,stk=Stk}) ->
     end.
 
 load_vars(Vs, Regs) ->
-    foldl(fun ({var,V}, Rs) -> put_reg(V, Rs) end, Regs, Vs).
+    foldl(fun (#k_var{name=V}, Rs) -> put_reg(V, Rs) end, Regs, Vs).
 
 %% put_reg(Val, Regs) -> Regs.
 %% find_reg(Val, Regs) -> {ok,r{R}} | error.
@@ -2259,10 +2769,6 @@ find_stack(_, [], _) -> error.
 
 on_stack(V, Stk) -> keymember(V, 1, Stk).
 
-is_register({x,_}) -> true;
-is_register({yy,_}) -> true;
-is_register(_) -> false.
-
 %% put_catch(CatchTag, Stack) -> Stack'
 %% drop_catch(CatchTag, Stack) -> Stack'
 %%  Special interface for putting and removing catch tags, to ensure that
@@ -2280,6 +2786,16 @@ put_catch(Tag, [Other|Stk], Acc) ->
 drop_catch(Tag, [{{catch_tag,Tag}}|Stk]) -> [free|Stk];
 drop_catch(Tag, [Other|Stk]) -> [Other|drop_catch(Tag, Stk)].
 
+%% atomic(Klit) -> Lit.
+%% atomic_list([Klit]) -> [Lit].
+
+atomic(#k_literal{val=V}) -> {literal,V};
+atomic(#k_int{val=I}) -> {integer,I};
+atomic(#k_float{val=F}) -> {float,F};
+atomic(#k_atom{val=A}) -> {atom,A};
+%%atomic(#k_char{val=C}) -> {char,C};
+atomic(#k_nil{}) -> nil.
+
 %% new_label(St) -> {L,St}.
 
 new_label(#cg{lcount=Next}=St) ->
@@ -2322,3 +2838,86 @@ flatmapfoldl(F, Accu0, [Hd|Tail]) ->
     {Rs,Accu2} = flatmapfoldl(F, Accu1, Tail),
     {R++Rs,Accu2};
 flatmapfoldl(_, Accu, []) -> {[],Accu}.
+
+%% Keep track of life time for variables.
+%%
+%% init_vars([{var,VarName}]) -> Vdb.
+%% new_vars([VarName], I, Vdb) -> Vdb.
+%% use_vars([VarName], I, Vdb) -> Vdb.
+%% add_var(VarName, F, L, Vdb) -> Vdb.
+%%
+%% The list of variable names for new_vars/3 and use_vars/3
+%% must be sorted.
+
+init_vars(Vs) ->
+    vdb_new(Vs).
+
+new_vars([], _, Vdb) -> Vdb;
+new_vars([V], I, Vdb) -> vdb_store_new(V, {V,I,I}, Vdb);
+new_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I).
+
+use_vars([], _, Vdb) ->
+    Vdb;
+use_vars([V], I, Vdb) ->
+    case vdb_find(V, Vdb) of
+        {V,F,L} when I > L -> vdb_update(V, {V,F,I}, Vdb);
+        {V,_,_} -> Vdb;
+        error -> vdb_store_new(V, {V,I,I}, Vdb)
+    end;
+use_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I).
+
+add_var(V, F, L, Vdb) ->
+    vdb_store_new(V, {V,F,L}, Vdb).
+
+%% vdb
+
+vdb_new(Vs) ->
+    ordsets:from_list([{V,0,0} || #k_var{name=V} <- Vs]).
+
+-type var() :: atom().
+
+-spec vdb_find(var(), [vdb_entry()]) -> 'error' | vdb_entry().
+
+vdb_find(V, Vdb) ->
+    case lists:keyfind(V, 1, Vdb) of
+        false -> error;
+        Vd -> Vd
+    end.
+
+vdb_update(V, Update, [{V,_,_}|Vdb]) ->
+    [Update|Vdb];
+vdb_update(V, Update, [Vd|Vdb]) ->
+    [Vd|vdb_update(V, Update, Vdb)].
+
+vdb_store_new(V, New, [{V1,_,_}=Vd|Vdb]) when V > V1 ->
+    [Vd|vdb_store_new(V, New, Vdb)];
+vdb_store_new(V, New, [{V1,_,_}|_]=Vdb) when V < V1 ->
+    [New|Vdb];
+vdb_store_new(_, New, []) -> [New].
+
+vdb_update_vars([V|_]=Vs, [{V1,_,_}=Vd|Vdb], I) when V > V1 ->
+    [Vd|vdb_update_vars(Vs, Vdb, I)];
+vdb_update_vars([V|Vs], [{V1,_,_}|_]=Vdb, I) when V < V1 ->
+    %% New variable.
+    [{V,I,I}|vdb_update_vars(Vs, Vdb, I)];
+vdb_update_vars([V|Vs], [{_,F,L}=Vd|Vdb], I) ->
+    %% Existing variable.
+    if
+        I > L -> [{V,F,I}|vdb_update_vars(Vs, Vdb, I)];
+        true ->  [Vd|vdb_update_vars(Vs, Vdb, I)]
+    end;
+vdb_update_vars([V|Vs], [], I) ->
+    %% New variable.
+    [{V,I,I}|vdb_update_vars(Vs, [], I)];
+vdb_update_vars([], Vdb, _) -> Vdb.
+
+%% vdb_sub(Min, Max, Vdb) -> Vdb.
+%%  Extract variables which are used before and after Min.  Lock
+%%  variables alive after Max.
+
+vdb_sub(Min, Max, Vdb) ->
+    [ if L >= Max -> {V,F,locked};
+         true -> Vd
+      end || {V,F,L}=Vd <- Vdb,
+             F < Min,
+             L >= Min ].
diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl
index 20cb3343fb..4799105d05 100644
--- a/lib/compiler/src/v3_core.erl
+++ b/lib/compiler/src/v3_core.erl
@@ -920,8 +920,9 @@ try_exception(Ecs0, St0) ->
     %% Note that Tag is not needed for rethrow - it is already in Info.
     {Evs,St1} = new_vars(3, St0), % Tag, Value, Info
     {Ecs1,Ceps,St2} = clauses(Ecs0, St1),
+    Ecs2 = try_build_stacktrace(Ecs1, hd(Evs)),
     [_,Value,Info] = Evs,
-    LA = case Ecs1 of
+    LA = case Ecs2 of
 	     [] -> [];
 	     [C|_] -> get_lineno_anno(C)
 	 end,
@@ -930,7 +931,7 @@ try_exception(Ecs0, St0) ->
 		  body=[#iprimop{anno=#a{},       %Must have an #a{}
 				 name=#c_literal{val=raise},
 				 args=[Info,Value]}]},
-    Hs = [#icase{anno=#a{anno=LA},args=[c_tuple(Evs)],clauses=Ecs1,fc=Ec}],
+    Hs = [#icase{anno=#a{anno=LA},args=[c_tuple(Evs)],clauses=Ecs2,fc=Ec}],
     {Evs,Ceps++Hs,St2}.
 
 try_after(As, St0) ->
@@ -946,6 +947,25 @@ try_after(As, St0) ->
     Hs = [#icase{anno=#a{},args=[c_tuple(Evs)],clauses=[],fc=Ec}],
     {Evs,Hs,St1}.
 
+try_build_stacktrace([#iclause{pats=Ps0,body=B0}=C0|Cs], RawStk) ->
+    [#c_tuple{es=[Class,Exc,Stk]}=Tup] = Ps0,
+    case Stk of
+        #c_var{name='_'} ->
+            %% Stacktrace variable is not used. Nothing to do.
+            [C0|try_build_stacktrace(Cs, RawStk)];
+        _ ->
+            %% Add code to build the stacktrace.
+            Ps = [Tup#c_tuple{es=[Class,Exc,RawStk]}],
+            Call = #iprimop{anno=#a{},
+                            name=#c_literal{val=build_stacktrace},
+                            args=[RawStk]},
+            Iset = #iset{var=Stk,arg=Call},
+            B = [Iset|B0],
+            C = C0#iclause{pats=Ps,body=B},
+            [C|try_build_stacktrace(Cs, RawStk)]
+    end;
+try_build_stacktrace([], _) -> [].
+
 %% expr_bin([ArgExpr], St) -> {[Arg],[PreExpr],St}.
 %%  Flatten the arguments of a bin. Do this straight left to right!
 %%  Note that ibinary needs to have its annotation wrapped in a #a{}
@@ -1132,7 +1152,7 @@ fun_tq(Cs0, L, St0, NameInfo) ->
 %% lc_tq(Line, Exp, [Qualifier], Mc, State) -> {LetRec,[PreExp],State}.
 %%  This TQ from Simon PJ pp 127-138.  
 
-lc_tq(Line, E, [#igen{anno=GAnno,ceps=Ceps,
+lc_tq(Line, E, [#igen{anno=#a{anno=GA}=GAnno,ceps=Ceps,
 		      acc_pat=AccPat,acc_guard=AccGuard,
                       skip_pat=SkipPat,tail=Tail,tail_pat=TailPat,
                       arg={Pre,Arg}}|Qs], Mc, St0) ->
@@ -1142,7 +1162,7 @@ lc_tq(Line, E, [#igen{anno=GAnno,ceps=Ceps,
     F = #c_var{anno=LA,name={Name,1}},
     Nc = #iapply{anno=GAnno,op=F,args=[Tail]},
     {Var,St2} = new_var(St1),
-    Fc = function_clause([Var], LA, {Name,1}),
+    Fc = function_clause([Var], GA, {Name,1}),
     TailClause = #iclause{anno=LAnno,pats=[TailPat],guard=[],body=[Mc]},
     Cs0 = case {AccPat,AccGuard} of
               {SkipPat,[]} ->
@@ -1165,9 +1185,9 @@ lc_tq(Line, E, [#igen{anno=GAnno,ceps=Ceps,
                                   body=Lps ++ [Lc]}|Cs0],
                         St3}
                end,
-    Fun = #ifun{anno=LAnno,id=[],vars=[Var],clauses=Cs,fc=Fc},
-    {#iletrec{anno=LAnno#a{anno=[list_comprehension|LA]},defs=[{{Name,1},Fun}],
-              body=Pre ++ [#iapply{anno=LAnno,op=F,args=[Arg]}]},
+    Fun = #ifun{anno=GAnno,id=[],vars=[Var],clauses=Cs,fc=Fc},
+    {#iletrec{anno=GAnno#a{anno=[list_comprehension|GA]},defs=[{{Name,1},Fun}],
+              body=Pre ++ [#iapply{anno=GAnno,op=F,args=[Arg]}]},
      Ceps,St4};
 lc_tq(Line, E, [#ifilter{}=Filter|Qs], Mc, St) ->
     filter_tq(Line, E, Filter, Mc, St, Qs, fun lc_tq/5);
@@ -1985,7 +2005,7 @@ new_fun_name(Type, #core{fcount=C}=St) ->
 %% new_var_name(State) -> {VarName,State}.
 
 new_var_name(#core{vcount=C}=St) ->
-    {list_to_atom("@c" ++ integer_to_list(C)),St#core{vcount=C + 1}}.
+    {C,St#core{vcount=C + 1}}.
 
 %% new_var(State) -> {{var,Name},State}.
 %% new_var(LineAnno, State) -> {{var,Name},State}.
@@ -2462,9 +2482,11 @@ cexpr(#icase{anno=A,args=Largs,clauses=Lcs,fc=Lfc}, As, St0) ->
 cexpr(#ireceive1{anno=A,clauses=Lcs}, As, St0) ->
     Exp = intersection(A#a.ns, As),		%Exports
     {Ccs,St1} = cclauses(Lcs, Exp, St0),
+    True = #c_literal{val=true},
+    Action = core_lib:make_values(lists:duplicate(1+length(Exp), True)),
     {#c_receive{anno=A#a.anno,
 		clauses=Ccs,
-		timeout=#c_literal{val=infinity},action=#c_literal{val=true}},
+		timeout=#c_literal{val=infinity},action=Action},
      Exp,A#a.us,St1};
 cexpr(#ireceive2{anno=A,clauses=Lcs,timeout=Lto,action=Les}, As, St0) ->
     Exp = intersection(A#a.ns, As),		%Exports
diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl
index 1fc05109c5..4e3ceedbc0 100644
--- a/lib/compiler/src/v3_kernel.erl
+++ b/lib/compiler/src/v3_kernel.erl
@@ -82,7 +82,8 @@
 -export([module/2,format_error/1]).
 
 -import(lists, [map/2,foldl/3,foldr/3,mapfoldl/3,splitwith/2,member/2,
-		keymember/3,keyfind/3,partition/2,droplast/1,last/1,sort/1]).
+		keymember/3,keyfind/3,partition/2,droplast/1,last/1,sort/1,
+                reverse/1]).
 -import(ordsets, [add_element/2,del_element/2,union/2,union/1,subtract/2]).
 -import(cerl, [c_tuple/1]).
 
@@ -107,6 +108,7 @@ copy_anno(Kdst, Ksrc) ->
 -record(iclause, {anno=[],isub,osub,pats,guard,body}).
 -record(ireceive_accept, {anno=[],arg}).
 -record(ireceive_next, {anno=[],arg}).
+-record(ignored, {anno=[]}).
 
 -type warning() :: term().	% XXX: REFINE
 
@@ -155,20 +157,23 @@ include_attribute(_) -> true.
 function({#c_var{name={F,Arity}=FA},Body}, St0) ->
     %%io:format("~w/~w~n", [F,Arity]),
     try
-	St1 = St0#kern{func=FA,ff=undefined,vcount=0,fcount=0,ds=cerl_sets:new()},
+        %% Find a suitable starting value for the variable counter. Note
+        %% that this pass assumes that new_var_name/1 returns a variable
+        %% name distinct from any variable used in the entire body of
+        %% the function. We use integers as variable names to avoid
+        %% filling up the atom table when compiling huge functions.
+        Count = cerl_trees:next_free_variable_name(Body),
+	St1 = St0#kern{func=FA,ff=undefined,vcount=Count,fcount=0,ds=cerl_sets:new()},
 	{#ifun{anno=Ab,vars=Kvs,body=B0},[],St2} = expr(Body, new_sub(), St1),
 	{B1,_,St3} = ubody(B0, return, St2),
 	%%B1 = B0, St3 = St2,				%Null second pass
-	{#k_fdef{anno=#k{us=[],ns=[],a=Ab},
-		 func=F,arity=Arity,vars=Kvs,body=B1},St3}
+        {make_fdef(#k{us=[],ns=[],a=Ab}, F, Arity, Kvs, B1),St3}
     catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
+        Class:Error:Stack ->
 	    io:fwrite("Function: ~w/~w\n", [F,Arity]),
 	    erlang:raise(Class, Error, Stack)
     end.
 
-
 %% body(Cexpr, Sub, State) -> {Kexpr,[PreKepxr],State}.
 %%  Do the main sequence of a body.  A body ends in an atomic value or
 %%  values.  Must check if vector first so do expr.
@@ -489,7 +494,7 @@ make_alt(First0, Then0) ->
     Then1 = pre_seq(droplast(Then0), last(Then0)),
     First2 = make_protected(First1),
     Then2 = make_protected(Then1),
-    Body = #k_atom{val=ignored},
+    Body = #ignored{},
     First3 = #k_guard_clause{guard=First2,body=Body},
     Then3 = #k_guard_clause{guard=Then2,body=Body},
     First = #k_guard{clauses=[First3]},
@@ -1356,7 +1361,7 @@ new_fun_name(Type, #kern{func={F,Arity},fcount=C}=St) ->
 %% new_var_name(State) -> {VarName,State}.
 
 new_var_name(#kern{vcount=C}=St) ->
-    {list_to_atom("@k" ++ integer_to_list(C)),St#kern{vcount=C+1}}.
+    {C,St#kern{vcount=C+1}}.
 
 %% new_var(State) -> {#k_var{},State}.
 
@@ -1589,23 +1594,18 @@ match_var([U|Us], Cs0, Def, St) ->
 %%  according to type, the order is really irrelevant but tries to be
 %%  smart.
 
-match_con(Us, [C], Def, St) ->
-    %% There is only one clause. We can keep literal tuples and
-    %% lists, but we must convert []/integer/float/atom literals
-    %% to the proper record (#k_nil{} and so on).
-    Cs = [expand_pat_lit_clause(C, false)],
-    match_con_1(Us, Cs, Def, St);
 match_con(Us, Cs0, Def, St) ->
-    %% More than one clause. Remove literals at the top level.
-    Cs = [expand_pat_lit_clause(C, true) || C <- Cs0],
+    %% Expand literals at the top level.
+    Cs = [expand_pat_lit_clause(C) || C <- Cs0],
     match_con_1(Us, Cs, Def, St).
 
 match_con_1([U|_Us] = L, Cs, Def, St0) ->
     %% Extract clauses for different constructors (types).
     %%ok = io:format("match_con ~p~n", [Cs]),
-    Ttcs = select_types([k_binary], Cs) ++ select_bin_con(Cs) ++
-	select_types([k_cons,k_tuple,k_map,k_atom,k_float,k_int,
-		      k_nil,k_literal], Cs),
+    Ttcs0 = select_types([k_binary], Cs) ++ select_bin_con(Cs) ++
+        select_types([k_cons,k_tuple,k_map,k_atom,k_float,
+                      k_int,k_nil], Cs),
+    Ttcs = opt_single_valued(Ttcs0),
     %%ok = io:format("ttcs = ~p~n", [Ttcs]),
     {Scs,St1} =
 	mapfoldl(fun ({T,Tcs}, St) ->
@@ -1618,28 +1618,14 @@ match_con_1([U|_Us] = L, Cs, Def, St0) ->
 
 select_types(Types, Cs) ->
     [{T,Tcs} || T <- Types, begin Tcs = select(T, Cs), Tcs =/= [] end].
-    
-expand_pat_lit_clause(#iclause{pats=[#ialias{pat=#k_literal{anno=A,val=Val}}=Alias|Ps]}=C, B) ->
-    P = case B of
-	    true -> expand_pat_lit(Val, A);
-	    false -> literal(Val, A)
-	end,
+
+expand_pat_lit_clause(#iclause{pats=[#ialias{pat=#k_literal{anno=A,val=Val}}=Alias|Ps]}=C) ->
+    P = expand_pat_lit(Val, A),
     C#iclause{pats=[Alias#ialias{pat=P}|Ps]};
-expand_pat_lit_clause(#iclause{pats=[#k_literal{anno=A,val=Val}|Ps]}=C, B) ->
-    P = case B of
-	    true -> expand_pat_lit(Val, A);
-	    false -> literal(Val, A)
-	end,
+expand_pat_lit_clause(#iclause{pats=[#k_literal{anno=A,val=Val}|Ps]}=C) ->
+    P = expand_pat_lit(Val, A),
     C#iclause{pats=[P|Ps]};
-expand_pat_lit_clause(#iclause{pats=[#k_binary{anno=A,segs=#k_bin_end{}}|Ps]}=C, B) ->
-    case B of
-	true ->
-	    C;
-	false ->
-	    P = #k_literal{anno=A,val = <<>>},
-	    C#iclause{pats=[P|Ps]}
-    end;
-expand_pat_lit_clause(C, _) -> C.
+expand_pat_lit_clause(C) -> C.
 
 expand_pat_lit([H|T], A) ->
     #k_cons{anno=A,hd=literal(H, A),tl=literal(T, A)};
@@ -1659,6 +1645,107 @@ literal(Val, A) when is_atom(Val) ->
 literal(Val, A) when is_list(Val); is_tuple(Val) ->
     #k_literal{anno=A,val=Val}.
 
+%% opt_singled_valued([{Type,Clauses}]) -> [{Type,Clauses}].
+%%  If a type only has one clause and if the pattern is literal,
+%%  the matching can be done more efficiently by directly comparing
+%%  with the literal (that is especially true for binaries).
+
+opt_single_valued(Ttcs) ->
+    opt_single_valued(Ttcs, [], []).
+
+opt_single_valued([{_,[#iclause{pats=[P0|Ps]}=Tc]}=Ttc|Ttcs], TtcAcc, LitAcc) ->
+    try combine_lit_pat(P0) of
+        P ->
+            LitTtc = Tc#iclause{pats=[P|Ps]},
+            opt_single_valued(Ttcs, TtcAcc, [LitTtc|LitAcc])
+    catch
+        not_possible ->
+            opt_single_valued(Ttcs, [Ttc|TtcAcc], LitAcc)
+    end;
+opt_single_valued([Ttc|Ttcs], TtcAcc, LitAcc) ->
+    opt_single_valued(Ttcs, [Ttc|TtcAcc], LitAcc);
+opt_single_valued([], TtcAcc, []) ->
+    reverse(TtcAcc);
+opt_single_valued([], TtcAcc, LitAcc) ->
+    Literals = {k_literal,reverse(LitAcc)},
+    %% Test the literals as early as possible.
+    case reverse(TtcAcc) of
+        [{k_binary,_}=Bin|Ttcs] ->
+            %% The delayed creation of sub binaries requires
+            %% bs_start_match2 to be the first instruction in the
+            %% function.
+            [Bin,Literals|Ttcs];
+        Ttcs ->
+            [Literals|Ttcs]
+    end.
+
+combine_lit_pat(#ialias{pat=Pat0}=Alias) ->
+    Pat = combine_lit_pat(Pat0),
+    Alias#ialias{pat=Pat};
+combine_lit_pat(Pat) ->
+    case do_combine_lit_pat(Pat) of
+        #k_literal{val=Val} when is_atom(Val) ->
+            throw(not_possible);
+        #k_literal{val=Val} when is_number(Val) ->
+            throw(not_possible);
+        #k_literal{val=[]} ->
+            throw(not_possible);
+        #k_literal{}=Lit ->
+            Lit
+    end.
+
+do_combine_lit_pat(#k_atom{anno=A,val=Val}) ->
+    #k_literal{anno=A,val=Val};
+do_combine_lit_pat(#k_float{anno=A,val=Val}) ->
+    #k_literal{anno=A,val=Val};
+do_combine_lit_pat(#k_int{anno=A,val=Val}) ->
+    #k_literal{anno=A,val=Val};
+do_combine_lit_pat(#k_nil{anno=A}) ->
+    #k_literal{anno=A,val=[]};
+do_combine_lit_pat(#k_binary{anno=A,segs=Segs}) ->
+    Bin = combine_bin_segs(Segs),
+    #k_literal{anno=A,val=Bin};
+do_combine_lit_pat(#k_cons{anno=A,hd=Hd0,tl=Tl0}) ->
+    #k_literal{val=Hd} = do_combine_lit_pat(Hd0),
+    #k_literal{val=Tl} = do_combine_lit_pat(Tl0),
+    #k_literal{anno=A,val=[Hd|Tl]};
+do_combine_lit_pat(#k_literal{}=Lit) ->
+    Lit;
+do_combine_lit_pat(#k_tuple{anno=A,es=Es0}) ->
+    Es = [begin
+              #k_literal{val=Lit} = do_combine_lit_pat(El),
+              Lit
+          end || El <- Es0],
+    #k_literal{anno=A,val=list_to_tuple(Es)};
+do_combine_lit_pat(_) ->
+    throw(not_possible).
+
+combine_bin_segs(#k_bin_seg{size=Size0,unit=Unit,type=integer,
+                            flags=[unsigned,big],seg=Seg,next=Next}) ->
+    #k_literal{val=Size1} = do_combine_lit_pat(Size0),
+    #k_literal{val=Int} = do_combine_lit_pat(Seg),
+    Size = Size1 * Unit,
+    if
+        0 < Size, Size < 64 ->
+            Bin = <<Int:Size>>,
+            case Bin of
+                <<Int:Size>> ->
+                    NextBin = combine_bin_segs(Next),
+                    <<Bin/bits,NextBin/bits>>;
+                _ ->
+                    %% The integer Int does not fit in the segment,
+                    %% thus it will not match.
+                    throw(not_possible)
+            end;
+        true ->
+            %% Avoid creating huge binary literals.
+            throw(not_possible)
+    end;
+combine_bin_segs(#k_bin_end{}) ->
+    <<>>;
+combine_bin_segs(_) ->
+    throw(not_possible).
+
 %% select_bin_con([Clause]) -> [{Type,[Clause]}].
 %%  Extract clauses for the k_bin_seg constructor.  As k_bin_seg
 %%  matching can overlap, the k_bin_seg constructors cannot be
@@ -2143,7 +2230,9 @@ ubody(E, return, St0) ->
 	    {Ea,Pa,St1} = force_atomic(E, St0),
 	    ubody(pre_seq(Pa, #ivalues{args=[Ea]}), return, St1)
     end;
-ubody(E, {break,_Rs} = Break, St0) ->
+ubody(#ignored{}, {break,_} = Break, St) ->
+    ubody(#ivalues{args=[]}, Break, St);
+ubody(E, {break,[_]} = Break, St0) ->
     %%ok = io:fwrite("ubody ~w:~p~n", [?LINE,{E,Br}]),
     %% Exiting expressions need no trailing break.
     case is_exit_expr(E) of
@@ -2151,6 +2240,16 @@ ubody(E, {break,_Rs} = Break, St0) ->
 	false ->
 	    {Ea,Pa,St1} = force_atomic(E, St0),
 	    ubody(pre_seq(Pa, #ivalues{args=[Ea]}), Break, St1)
+    end;
+ubody(E, {break,Rs}=Break, St0) ->
+    case is_exit_expr(E) of
+        true ->
+            uexpr(E, return, St0);
+        false ->
+            {Vs,St1} = new_vars(length(Rs), St0),
+            Iset = #iset{vars=Vs,arg=E},
+            PreSeq = pre_seq([Iset], #ivalues{args=Vs}),
+            ubody(PreSeq, Break, St1)
     end.
 
 iletrec_funs(#iletrec{defs=Fs}, St0) ->
@@ -2179,9 +2278,8 @@ iletrec_funs_gen(Fs, FreeVs, St) ->
 		  Arity0 = length(Vs),
 		  {Fb1,_,Lst1} = ubody(Fb0, return, Lst0#kern{ff={N,Arity0}}),
 		  Arity = Arity0 + length(FreeVs),
-		  Fun = #k_fdef{anno=#k{us=[],ns=[],a=Fa},
-				func=N,arity=Arity,
-				vars=Vs ++ FreeVs,body=Fb1},
+                  Fun = make_fdef(#k{us=[],ns=[],a=Fa}, N, Arity,
+                                  Vs++FreeVs, Fb1),
 		  Lst1#kern{funs=[Fun|Lst1#kern.funs]}
 	  end, St, Fs).
 
@@ -2284,12 +2382,11 @@ uexpr(#k_try{anno=A,arg=A0,vars=Vs,body=B0,evars=Evs,handler=H0},
 	    {A1,Au,St2} = ubody(A0, {break,Avs}, St1),
 	    {B1,Bu,St3} = ubody(B0, Br, St2),
 	    {H1,Hu,St4} = ubody(H0, Br, St3),
-	    {Rs1,St5} = ensure_return_vars(Rs0, St4),
 	    Used = union([Au,subtract(Bu, lit_list_vars(Vs)),
 			  subtract(Hu, lit_list_vars(Evs))]),
-	    {#k_try{anno=#k{us=Used,ns=lit_list_vars(Rs1),a=A},
-		    arg=A1,vars=Vs,body=B1,evars=Evs,handler=H1,ret=Rs1},
-	     Used,St5}
+	    {#k_try{anno=#k{us=Used,ns=lit_list_vars(Rs0),a=A},
+		    arg=A1,vars=Vs,body=B1,evars=Evs,handler=H1,ret=Rs0},
+	     Used,St4}
     end;
 uexpr(#k_try{anno=A,arg=A0,vars=Vs,body=B0,evars=Evs,handler=H0},
       return, St0) ->
@@ -2297,13 +2394,11 @@ uexpr(#k_try{anno=A,arg=A0,vars=Vs,body=B0,evars=Evs,handler=H0},
     {A1,Au,St2} = ubody(A0, {break,Avs}, St1),	%Must break to clean up here!
     {B1,Bu,St3} = ubody(B0, return, St2),
     {H1,Hu,St4} = ubody(H0, return, St3),
-    NumNew = 1,
-    {Ns,St5} = new_vars(NumNew, St4),
     Used = union([Au,subtract(Bu, lit_list_vars(Vs)),
 		  subtract(Hu, lit_list_vars(Evs))]),
-    {#k_try_enter{anno=#k{us=Used,ns=Ns,a=A},
+    {#k_try_enter{anno=#k{us=Used,ns=[],a=A},
 		  arg=A1,vars=Vs,body=B1,evars=Evs,handler=H1},
-     Used,St5};
+     Used,St4};
 uexpr(#k_catch{anno=A,body=B0}, {break,Rs0}, St0) ->
     {Rb,St1} = new_var(St0),
     {B1,Bu,St2} = ubody(B0, {break,[Rb]}, St1),
@@ -2325,8 +2420,7 @@ uexpr(#ifun{anno=A,vars=Vs,body=B0}, {break,Rs}, St0) ->
 		%% No id annotation. Must invent a fun name.
 		new_fun_name(St1)
 	end,
-    Fun = #k_fdef{anno=#k{us=[],ns=[],a=A},func=Fname,arity=Arity,
-		  vars=Vs ++ Fvs,body=B1},
+    Fun = make_fdef(#k{us=[],ns=[],a=A}, Fname, Arity, Vs++Fvs, B1),
     {#k_bif{anno=#k{us=Free,ns=lit_list_vars(Rs),a=A},
 	    op=#k_internal{name=make_fun,arity=length(Free)+2},
 	    args=[#k_atom{val=Fname},#k_int{val=Arity}|Fvs],
@@ -2343,6 +2437,16 @@ uexpr(Lit, {break,Rs0}, St0) ->
 add_local_function(_, #kern{funs=ignore}=St) -> St;
 add_local_function(F, #kern{funs=Funs}=St) -> St#kern{funs=[F|Funs]}.
 
+%% Make a #k_fdef{}, making sure that the body is always a #k_match{}.
+make_fdef(Anno, Name, Arity, Vs, #k_match{}=Body) ->
+    #k_fdef{anno=Anno,func=Name,arity=Arity,vars=Vs,body=Body};
+make_fdef(Anno, Name, Arity, Vs, Body) ->
+    Ka = get_kanno(Body),
+    Match = #k_match{anno=#k{us=Ka#k.us,ns=[],a=Ka#k.a},
+                     vars=Vs,body=Body,ret=[]},
+    #k_fdef{anno=Anno,func=Name,arity=Arity,vars=Vs,body=Match}.
+
+
 %% handle_reuse_annos([#k_var{}], State) -> State.
 %%  In general, it is only safe to reuse a variable for a match context
 %%  if the original value of the variable will no longer be needed.
diff --git a/lib/compiler/src/v3_kernel_pp.erl b/lib/compiler/src/v3_kernel_pp.erl
index ac91039ae0..e9cbe81088 100644
--- a/lib/compiler/src/v3_kernel_pp.erl
+++ b/lib/compiler/src/v3_kernel_pp.erl
@@ -248,7 +248,7 @@ format_1(#k_put{arg=A,ret=Rs}, Ctxt) ->
     [format(A, Ctxt),
      format_ret(Rs, ctxt_bump_indent(Ctxt, 1))
     ];
-format_1(#k_try{arg=A,vars=Vs,body=B,evars=Evs,handler=H}, Ctxt) ->
+format_1(#k_try{arg=A,vars=Vs,body=B,evars=Evs,handler=H,ret=Rs}, Ctxt) ->
     Ctxt1 = ctxt_bump_indent(Ctxt, Ctxt#ctxt.body_indent),
     ["try",
      nl_indent(Ctxt1),
@@ -264,7 +264,8 @@ format_1(#k_try{arg=A,vars=Vs,body=B,evars=Evs,handler=H}, Ctxt) ->
      nl_indent(Ctxt1),
      format(H, Ctxt1),
      nl_indent(Ctxt),
-     "end"
+     "end",
+     format_ret(Rs, Ctxt)
     ];
 format_1(#k_try_enter{arg=A,vars=Vs,body=B,evars=Evs,handler=H}, Ctxt) ->
     Ctxt1 = ctxt_bump_indent(Ctxt, Ctxt#ctxt.body_indent),
diff --git a/lib/compiler/src/v3_life.erl b/lib/compiler/src/v3_life.erl
deleted file mode 100644
index be3ade47ff..0000000000
--- a/lib/compiler/src/v3_life.erl
+++ /dev/null
@@ -1,468 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 1999-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-%%
-%% Purpose : Convert annotated kernel expressions to annotated beam format.
-
-%% This module creates beam format annotated with variable lifetime
-%% information.  Each thing is given an index and for each variable we
-%% store the first and last index for its occurrence.  The variable
-%% database, VDB, attached to each thing is only relevant internally
-%% for that thing.
-%%
-%% For nested things like matches the numbering continues locally and
-%% the VDB for that thing refers to the variable usage within that
-%% thing.  Variables which live through a such a thing are internally
-%% given a very large last index.  Internally the indexes continue
-%% after the index of that thing.  This creates no problems as the
-%% internal variable info never escapes and externally we only see
-%% variable which are alive both before or after.
-%%
-%% This means that variables never "escape" from a thing and the only
-%% way to get values from a thing is to "return" them, with 'break' or
-%% 'return'.  Externally these values become the return values of the
-%% thing.  This is no real limitation as most nested things have
-%% multiple threads so working out a common best variable usage is
-%% difficult.
-
--module(v3_life).
-
--export([module/2]).
-
--export([vdb_find/2]).
-
--import(lists, [member/2,map/2,reverse/1,sort/1]).
--import(ordsets, [add_element/2,intersection/2,union/2]).
-
--include("v3_kernel.hrl").
--include("v3_life.hrl").
-
--type fa() :: {atom(),arity()}.
-
-%% These are not defined in v3_kernel.hrl.
-get_kanno(Kthing) -> element(2, Kthing).
-%%set_kanno(Kthing, Anno) -> setelement(2, Kthing, Anno).
-
--spec module(#k_mdef{}, [compile:option()]) ->
-                    {'ok',{module(),[fa()],[_],[_]}}.
-
-module(#k_mdef{name=M,exports=Es,attributes=As,body=Fs0}, _Opts) ->
-    Fs1 = functions(Fs0, []),
-    {ok,{M,Es,As,Fs1}}.
-
-functions([F|Fs], Acc) ->
-    functions(Fs, [function(F)|Acc]);
-functions([], Acc) -> reverse(Acc).
-
-%% function(Kfunc) -> Func.
-
-function(#k_fdef{anno=#k{a=Anno},func=F,arity=Ar,vars=Vs,body=Kb}) ->
-    try
-	As = var_list(Vs),
-	Vdb0 = init_vars(As),
-	%% Force a top-level match!
-	B0 = case Kb of
-		 #k_match{} -> Kb;
-		 _ ->
-		     Ka = get_kanno(Kb),
-		     #k_match{anno=#k{us=Ka#k.us,ns=[],a=Ka#k.a},
-			      vars=Vs,body=Kb,ret=[]}
-	     end,
-	{B1,_,Vdb1} = body(B0, 1, Vdb0),
-	{function,F,Ar,As,B1,Vdb1,Anno}
-    catch
-	Class:Error ->
-	    Stack = erlang:get_stacktrace(),
-	    io:fwrite("Function: ~w/~w\n", [F,Ar]),
-	    erlang:raise(Class, Error, Stack)
-    end.
-
-%% body(Kbody, I, Vdb) -> {[Expr],MaxI,Vdb}.
-%%  Handle a body.
-
-body(#k_seq{arg=Ke,body=Kb}, I, Vdb0) ->
-    %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]),
-    A = get_kanno(Ke),
-    Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0),
-    {Es,MaxI,Vdb2} = body(Kb, I+1, Vdb1),
-    E = expr(Ke, I, Vdb2),
-    {[E|Es],MaxI,Vdb2};
-body(Ke, I, Vdb0) ->
-    %%ok = io:fwrite("life ~w:~p~n", [?LINE,{Ke,I,Vdb0}]),
-    A = get_kanno(Ke),
-    Vdb1 = use_vars(union(A#k.us, A#k.ns), I, Vdb0),
-    E = expr(Ke, I, Vdb1),
-    {[E],I,Vdb1}.
-
-%% protected(Kprotected, I, Vdb) -> Protected.
-%%  Only used in guards.
-
-protected(#k_protected{anno=A,arg=Ts,ret=Rs}, I, Vdb) ->
-    %% Lock variables that are alive before try and used afterwards.
-    %% Don't lock variables that are only used inside the protected
-    %% expression.
-    Pdb0 = vdb_sub(I, I+1, Vdb),
-    {T,MaxI,Pdb1} = body(Ts, I+1, Pdb0),
-    Pdb2 = use_vars(A#k.ns, MaxI+1, Pdb1),	%Save "return" values
-    #l{ke={protected,T,var_list(Rs)},i=I,a=A#k.a,vdb=Pdb2}.
-
-%% expr(Kexpr, I, Vdb) -> Expr.
-
-expr(#k_test{anno=A,op=Op,args=As,inverted=Inverted}, I, _Vdb) ->
-    #l{ke={test,test_op(Op),atomic_list(As),Inverted},i=I,a=A#k.a};
-expr(#k_call{anno=A,op=Op,args=As,ret=Rs}, I, _Vdb) ->
-    #l{ke={call,call_op(Op),atomic_list(As),var_list(Rs)},i=I,a=A#k.a};
-expr(#k_enter{anno=A,op=Op,args=As}, I, _Vdb) ->
-    #l{ke={enter,call_op(Op),atomic_list(As)},i=I,a=A#k.a};
-expr(#k_bif{anno=A,op=Op,args=As,ret=Rs}, I, _Vdb) ->
-    Bif = k_bif(A, Op, As, Rs),
-    #l{ke=Bif,i=I,a=A#k.a};
-expr(#k_match{anno=A,body=Kb,ret=Rs}, I, Vdb) ->
-    %% Work out imported variables which need to be locked.
-    Mdb = vdb_sub(I, I+1, Vdb),
-    M = match(Kb, A#k.us, I+1, [], Mdb),
-    #l{ke={match,M,var_list(Rs)},i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a};
-expr(#k_guard_match{anno=A,body=Kb,ret=Rs}, I, Vdb) ->
-    %% Work out imported variables which need to be locked.
-    Mdb = vdb_sub(I, I+1, Vdb),
-    M = match(Kb, A#k.us, I+1, [], Mdb),
-    #l{ke={guard_match,M,var_list(Rs)},i=I,vdb=use_vars(A#k.us, I+1, Mdb),a=A#k.a};
-expr(#k_try{}=Try, I, Vdb) ->
-    body_try(Try, I, Vdb);
-expr(#k_protected{}=Protected, I, Vdb) ->
-    protected(Protected, I, Vdb);
-expr(#k_try_enter{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh}, I, Vdb) ->
-    %% Lock variables that are alive before the catch and used afterwards.
-    %% Don't lock variables that are only used inside the try.
-    Tdb0 = vdb_sub(I, I+1, Vdb),
-    %% This is the tricky bit. Lock variables in Arg that are used in
-    %% the body and handler. Add try tag 'variable'.
-    Ab = get_kanno(Kb),
-    Ah = get_kanno(Kh),
-    Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0),
-    Tdb2 = vdb_sub(I, I+2, Tdb1),
-    Vnames = fun (Kvar) -> Kvar#k_var.name end,	%Get the variable names
-    {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, 1000000, Tdb2)),
-    {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)),
-    {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)),
-    #l{ke={try_enter,#l{ke={block,Aes},i=I+1,vdb=Adb,a=[]},
-	   var_list(Vs),#l{ke={block,Bes},i=I+3,vdb=Bdb,a=[]},
-	   var_list(Evs),#l{ke={block,Hes},i=I+3,vdb=Hdb,a=[]}},
-       i=I,vdb=Tdb1,a=A#k.a};
-expr(#k_catch{anno=A,body=Kb,ret=[R]}, I, Vdb) ->
-    %% Lock variables that are alive before the catch and used afterwards.
-    %% Don't lock variables that are only used inside the catch.
-    %% Add catch tag 'variable'.
-    Cdb0 = vdb_sub(I, I+1, Vdb),
-    {Es,_,Cdb1} = body(Kb, I+1, add_var({catch_tag,I}, I, locked, Cdb0)),
-    #l{ke={'catch',Es,variable(R)},i=I,vdb=Cdb1,a=A#k.a};
-expr(#k_receive{anno=A,var=V,body=Kb,timeout=T,action=Ka,ret=Rs}, I, Vdb) ->
-    %% Work out imported variables which need to be locked.
-    Rdb = vdb_sub(I, I+1, Vdb),
-    M = match(Kb, add_element(V#k_var.name, A#k.us), I+1, [],
-	      new_vars([V#k_var.name], I, Rdb)),
-    {Tes,_,Adb} = body(Ka, I+1, Rdb),
-    #l{ke={receive_loop,atomic(T),variable(V),M,
-	   #l{ke=Tes,i=I+1,vdb=Adb,a=[]},var_list(Rs)},
-       i=I,vdb=use_vars(A#k.us, I+1, Vdb),a=A#k.a};
-expr(#k_receive_accept{anno=A}, I, _Vdb) ->
-    #l{ke=receive_accept,i=I,a=A#k.a};
-expr(#k_receive_next{anno=A}, I, _Vdb) ->
-    #l{ke=receive_next,i=I,a=A#k.a};
-expr(#k_put{anno=A,arg=Arg,ret=Rs}, I, _Vdb) ->
-    #l{ke={set,var_list(Rs),literal(Arg, [])},i=I,a=A#k.a};
-expr(#k_break{anno=A,args=As}, I, _Vdb) ->
-    #l{ke={break,atomic_list(As)},i=I,a=A#k.a};
-expr(#k_guard_break{anno=A,args=As}, I, Vdb) ->
-    Locked = [V || {V,_,_} <- Vdb],
-    #l{ke={guard_break,atomic_list(As),Locked},i=I,a=A#k.a};
-expr(#k_return{anno=A,args=As}, I, _Vdb) ->
-    #l{ke={return,atomic_list(As)},i=I,a=A#k.a}.
-
-body_try(#k_try{anno=A,arg=Ka,vars=Vs,body=Kb,evars=Evs,handler=Kh,ret=Rs},
-	 I, Vdb) ->
-    %% Lock variables that are alive before the catch and used afterwards.
-    %% Don't lock variables that are only used inside the try.
-    Tdb0 = vdb_sub(I, I+1, Vdb),
-    %% This is the tricky bit. Lock variables in Arg that are used in
-    %% the body and handler. Add try tag 'variable'.
-    Ab = get_kanno(Kb),
-    Ah = get_kanno(Kh),
-    Tdb1 = use_vars(union(Ab#k.us, Ah#k.us), I+3, Tdb0),
-    Tdb2 = vdb_sub(I, I+2, Tdb1),
-    Vnames = fun (Kvar) -> Kvar#k_var.name end,	%Get the variable names
-    {Aes,_,Adb} = body(Ka, I+2, add_var({catch_tag,I+1}, I+1, locked, Tdb2)),
-    {Bes,_,Bdb} = body(Kb, I+4, new_vars(sort(map(Vnames, Vs)), I+3, Tdb2)),
-    {Hes,_,Hdb} = body(Kh, I+4, new_vars(sort(map(Vnames, Evs)), I+3, Tdb2)),
-    #l{ke={'try',#l{ke={block,Aes},i=I+1,vdb=Adb,a=[]},
-	   var_list(Vs),#l{ke={block,Bes},i=I+3,vdb=Bdb,a=[]},
-	   var_list(Evs),#l{ke={block,Hes},i=I+3,vdb=Hdb,a=[]},
-	   var_list(Rs)},
-       i=I,vdb=Tdb1,a=A#k.a}.
-
-%% call_op(Op) -> Op.
-%% test_op(Op) -> Op.
-%%  Do any necessary name translations here to munge into beam format.
-
-call_op(#k_local{name=N}) -> N; 
-call_op(#k_remote{mod=M,name=N}) -> {remote,atomic(M),atomic(N)};
-call_op(Other) -> variable(Other).
-
-test_op(#k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=N}}) -> N.
-
-%% k_bif(Anno, Op, [Arg], [Ret], Vdb) -> Expr.
-%%  Build bifs.
-
-k_bif(_A, #k_internal{name=Name}, As, Rs) ->
-    {internal,Name,atomic_list(As),var_list(Rs)};
-k_bif(_A, #k_remote{mod=#k_atom{val=erlang},name=#k_atom{val=Name}}, As, Rs) ->
-    Ar = length(As),
-    case is_gc_bif(Name, Ar) of
-	false ->
-	    {bif,Name,atomic_list(As),var_list(Rs)};
-	true ->
-	    {gc_bif,Name,atomic_list(As),var_list(Rs)}
-    end.
-
-%% match(Kexpr, [LockVar], I, Vdb) -> Expr.
-%%  Convert match tree to old format.
-
-match(#k_alt{anno=A,first=Kf,then=Kt}, Ls, I, Ctxt, Vdb0) ->
-    Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0),
-    F = match(Kf, Ls, I+1, Ctxt, Vdb1),
-    T = match(Kt, Ls, I+1, Ctxt, Vdb1),
-    #l{ke={alt,F,T},i=I,vdb=Vdb1,a=A#k.a};
-match(#k_select{anno=A,var=V,types=Kts}, Ls0, I, Ctxt, Vdb0) ->
-    Vanno = get_kanno(V),
-    Ls1 = case member(no_usage, Vanno) of
-	      false -> add_element(V#k_var.name, Ls0);
-	      true -> Ls0
-	  end,
-    Anno = case member(reuse_for_context, Vanno) of
-	       true -> [reuse_for_context|A#k.a];
-	       false -> A#k.a
-	   end,
-    Vdb1 = use_vars(union(A#k.us, Ls1), I, Vdb0),
-    Ts = [type_clause(Tc, Ls1, I+1, Ctxt, Vdb1) || Tc <- Kts],
-    #l{ke={select,literal(V, Ctxt),Ts},i=I,vdb=Vdb1,a=Anno};
-match(#k_guard{anno=A,clauses=Kcs}, Ls, I, Ctxt, Vdb0) ->
-    Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0),
-    Cs = [guard_clause(G, Ls, I+1, Ctxt, Vdb1) || G <- Kcs],
-    #l{ke={guard,Cs},i=I,vdb=Vdb1,a=A#k.a};
-match(Other, Ls, I, _Ctxt, Vdb0) ->
-    Vdb1 = use_vars(Ls, I, Vdb0),
-    {B,_,Vdb2} = body(Other, I+1, Vdb1),
-    #l{ke={block,B},i=I,vdb=Vdb2,a=[]}.
-
-type_clause(#k_type_clause{anno=A,type=T,values=Kvs}, Ls, I, Ctxt, Vdb0) ->
-    %%ok = io:format("life ~w: ~p~n", [?LINE,{T,Kvs}]),
-    Vdb1 = use_vars(union(A#k.us, Ls), I+1, Vdb0),
-    Vs = [val_clause(Vc, Ls, I+1, Ctxt, Vdb1) || Vc <- Kvs],
-    #l{ke={type_clause,type(T),Vs},i=I,vdb=Vdb1,a=A#k.a}.
-
-val_clause(#k_val_clause{anno=A,val=V,body=Kb}, Ls0, I, Ctxt0, Vdb0) ->
-    New = (get_kanno(V))#k.ns,
-    Bus = (get_kanno(Kb))#k.us,
-    %%ok = io:format("Ls0 = ~p, Used=~p\n  New=~p, Bus=~p\n", [Ls0,Used,New,Bus]),
-    Ls1 = union(intersection(New, Bus), Ls0),	%Lock for safety
-    Vdb1 = use_vars(union(A#k.us, Ls1), I+1, new_vars(New, I, Vdb0)),
-    Ctxt = case V of
-	       #k_binary{segs=#k_var{name=C0}} -> C0;
-	       _ -> Ctxt0
-	   end,
-    B = match(Kb, Ls1, I+1, Ctxt, Vdb1),
-    #l{ke={val_clause,literal(V, Ctxt),B},i=I,vdb=use_vars(Bus, I+1, Vdb1),a=A#k.a}.
-
-guard_clause(#k_guard_clause{anno=A,guard=Kg,body=Kb}, Ls, I, Ctxt, Vdb0) ->
-    Vdb1 = use_vars(union(A#k.us, Ls), I+2, Vdb0),
-    Gdb = vdb_sub(I+1, I+2, Vdb1),
-    G = protected(Kg, I+1, Gdb),
-    B = match(Kb, Ls, I+2, Ctxt, Vdb1),
-    #l{ke={guard_clause,G,B},
-       i=I,vdb=use_vars((get_kanno(Kg))#k.us, I+2, Vdb1),
-       a=A#k.a}.
-
-%% type(Ktype) -> Type.
-
-type(k_literal) -> literal;
-type(k_int) -> integer;
-%%type(k_char) -> integer;			%Hhhmmm???
-type(k_float) -> float;
-type(k_atom) -> atom;
-type(k_nil) -> nil;
-type(k_cons) -> cons;
-type(k_tuple) -> tuple;
-type(k_binary) -> binary;
-type(k_bin_seg) -> bin_seg;
-type(k_bin_int) -> bin_int;
-type(k_bin_end) -> bin_end;
-type(k_map) -> map.
-
-%% variable(Klit) -> Lit.
-%% var_list([Klit]) -> [Lit].
-
-variable(#k_var{name=N}) -> {var,N}.
-
-var_list(Ks) -> [variable(K) || K <- Ks].
-
-%% atomic(Klit) -> Lit.
-%% atomic_list([Klit]) -> [Lit].
-
-atomic(#k_literal{val=V}) -> {literal,V};
-atomic(#k_var{name=N}) -> {var,N};
-atomic(#k_int{val=I}) -> {integer,I};
-atomic(#k_float{val=F}) -> {float,F};
-atomic(#k_atom{val=N}) -> {atom,N};
-%%atomic(#k_char{val=C}) -> {char,C};
-atomic(#k_nil{}) -> nil.
-
-atomic_list(Ks) -> [atomic(K) || K <- Ks].
-
-%% literal(Klit) -> Lit.
-%% literal_list([Klit]) -> [Lit].
-
-literal(#k_var{name=N}, _) -> {var,N};
-literal(#k_literal{val=I}, _) -> {literal,I};
-literal(#k_int{val=I}, _) -> {integer,I};
-literal(#k_float{val=F}, _) -> {float,F};
-literal(#k_atom{val=N}, _) -> {atom,N};
-%%literal(#k_char{val=C}, _) -> {char,C};
-literal(#k_nil{}, _) -> nil;
-literal(#k_cons{hd=H,tl=T}, Ctxt) ->
-    {cons,[literal(H, Ctxt),literal(T, Ctxt)]};
-literal(#k_binary{segs=V}, Ctxt) ->
-    {binary,literal(V, Ctxt)};
-literal(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=[]}, Ctxt) ->
-    %% Only occurs in patterns.
-    {bin_seg,Ctxt,literal(S, Ctxt),U,T,Fs,[literal(Seg, Ctxt)]};
-literal(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=N}, Ctxt) ->
-    {bin_seg,Ctxt,literal(S, Ctxt),U,T,Fs,
-     [literal(Seg, Ctxt),literal(N, Ctxt)]};
-literal(#k_bin_int{size=S,unit=U,flags=Fs,val=Int,next=N}, Ctxt) ->
-    %% Only occurs in patterns.
-    {bin_int,Ctxt,literal(S, Ctxt),U,Fs,Int,
-     [literal(N, Ctxt)]};
-literal(#k_bin_end{}, Ctxt) ->
-    {bin_end,Ctxt};
-literal(#k_tuple{es=Es}, Ctxt) ->
-    {tuple,literal_list(Es, Ctxt)};
-literal(#k_map{op=Op,var=Var,es=Es0}, Ctxt) ->
-    {map,Op,literal(Var, Ctxt),literal_list(Es0, Ctxt)};
-literal(#k_map_pair{key=K,val=V}, Ctxt) ->
-    {map_pair,literal(K, Ctxt),literal(V, Ctxt)}.
-
-literal_list(Ks, Ctxt) ->
-    [literal(K, Ctxt) || K <- Ks].
-
-
-%% is_gc_bif(Name, Arity) -> true|false
-%%  Determines whether the BIF Name/Arity might do a GC.
-
-is_gc_bif(hd, 1) -> false;
-is_gc_bif(tl, 1) -> false;
-is_gc_bif(self, 0) -> false;
-is_gc_bif(node, 0) -> false;
-is_gc_bif(node, 1) -> false;
-is_gc_bif(element, 2) -> false;
-is_gc_bif(get, 1) -> false;
-is_gc_bif(tuple_size, 1) -> false;
-is_gc_bif(Bif, Arity) ->
-    not (erl_internal:bool_op(Bif, Arity) orelse
-	 erl_internal:new_type_test(Bif, Arity) orelse
-	 erl_internal:comp_op(Bif, Arity)).
-
-%% Keep track of life time for variables.
-%%
-%% init_vars([{var,VarName}]) -> Vdb.
-%% new_vars([VarName], I, Vdb) -> Vdb.
-%% use_vars([VarName], I, Vdb) -> Vdb.
-%% add_var(VarName, F, L, Vdb) -> Vdb.
-%%
-%% The list of variable names for new_vars/3 and use_vars/3
-%% must be sorted.
-
-init_vars(Vs) ->
-    vdb_new(Vs).
-
-new_vars([], _, Vdb) -> Vdb;
-new_vars([V], I, Vdb) -> vdb_store_new(V, {V,I,I}, Vdb);
-new_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I).
-
-use_vars([], _, Vdb) ->
-    Vdb;
-use_vars([V], I, Vdb) ->
-    case vdb_find(V, Vdb) of
-	{V,F,L} when I > L -> vdb_update(V, {V,F,I}, Vdb);
-	{V,_,_} -> Vdb;
-	error -> vdb_store_new(V, {V,I,I}, Vdb)
-    end;
-use_vars(Vs, I, Vdb) -> vdb_update_vars(Vs, Vdb, I).
-
-add_var(V, F, L, Vdb) ->
-    vdb_store_new(V, {V,F,L}, Vdb).
-
-%% vdb
-
-vdb_new(Vs) ->
-    sort([{V,0,0} || {var,V} <- Vs]).
-
--type var() :: atom().
-
--spec vdb_find(var(), [vdb_entry()]) -> 'error' | vdb_entry().
-
-vdb_find(V, Vdb) ->
-    case lists:keyfind(V, 1, Vdb) of
-	false -> error;
-	Vd -> Vd
-    end.
-
-vdb_update(V, Update, [{V,_,_}|Vdb]) ->
-    [Update|Vdb];
-vdb_update(V, Update, [Vd|Vdb]) ->
-    [Vd|vdb_update(V, Update, Vdb)].
-
-vdb_store_new(V, New, [{V1,_,_}=Vd|Vdb]) when V > V1 ->
-    [Vd|vdb_store_new(V, New, Vdb)];
-vdb_store_new(V, New, [{V1,_,_}|_]=Vdb) when V < V1 ->
-    [New|Vdb];
-vdb_store_new(_, New, []) -> [New].
-
-vdb_update_vars([V|_]=Vs, [{V1,_,_}=Vd|Vdb], I) when V > V1 ->
-    [Vd|vdb_update_vars(Vs, Vdb, I)];
-vdb_update_vars([V|Vs], [{V1,_,_}|_]=Vdb, I) when V < V1 ->
-    %% New variable.
-    [{V,I,I}|vdb_update_vars(Vs, Vdb, I)];
-vdb_update_vars([V|Vs], [{_,F,L}=Vd|Vdb], I) ->
-    %% Existing variable.
-    if
-	I > L -> [{V,F,I}|vdb_update_vars(Vs, Vdb, I)];
-	true ->  [Vd|vdb_update_vars(Vs, Vdb, I)]
-    end;
-vdb_update_vars([V|Vs], [], I) ->
-    %% New variable.
-    [{V,I,I}|vdb_update_vars(Vs, [], I)];
-vdb_update_vars([], Vdb, _) -> Vdb.
-
-%% vdb_sub(Min, Max, Vdb) -> Vdb.
-%%  Extract variables which are used before and after Min.  Lock
-%%  variables alive after Max.
-
-vdb_sub(Min, Max, Vdb) ->
-    [ if L >= Max -> {V,F,locked};
-	 true -> Vd
-      end || {V,F,L}=Vd <- Vdb, F < Min, L >= Min ].
diff --git a/lib/compiler/test/beam_block_SUITE.erl b/lib/compiler/test/beam_block_SUITE.erl
index 55d5f2dbe8..38ead96cc8 100644
--- a/lib/compiler/test/beam_block_SUITE.erl
+++ b/lib/compiler/test/beam_block_SUITE.erl
@@ -22,7 +22,7 @@
 -export([all/0,suite/0,groups/0,init_per_suite/1,end_per_suite/1,
 	 init_per_group/2,end_per_group/2,
 	 get_map_elements/1,otp_7345/1,move_opt_across_gc_bif/1,
-	 erl_202/1,repro/1]).
+	 erl_202/1,repro/1,local_cse/1,second_block_pass/1]).
 
 %% The only test for the following functions is that
 %% the code compiles and is accepted by beam_validator.
@@ -40,7 +40,9 @@ groups() ->
        otp_7345,
        move_opt_across_gc_bif,
        erl_202,
-       repro
+       repro,
+       local_cse,
+       second_block_pass
       ]}].
 
 init_per_suite(Config) ->
@@ -237,6 +239,72 @@ find_operands(Cfg,XsiGraph,ActiveList,Count) ->
     [Count+1, length(NewActiveList), length(digraph:vertices(XsiGraph))],
     find_operands(NewCfg,XsiGraph,NewActiveList,Count+1).
 
+%% Some tests of local common subexpression elimination (CSE).
+
+local_cse(_Config) ->
+    {Self,{ok,Self}} = local_cse_1(),
+
+    local_cse_2([]),
+    local_cse_2(lists:seq(1, 512)),
+    local_cse_2(?MODULE:module_info()),
+
+    {[b],[a,b]} = local_cse_3(a, b),
+
+    {2000,Self,{Self,write_cache}} = local_cse_4(),
+
+    ok.
+
+local_cse_1() ->
+    %% Cover handling of unsafe tuple construction in
+    %% eliminate_use_of_from_reg/4. It became necessary to handle
+    %% unsafe tuples when local CSE was introduced.
+
+    {self(),{ok,self()}}.
+
+local_cse_2(Term) ->
+    case cse_make_binary(Term) of
+        <<Size:8,BinTerm:Size/binary>> ->
+            Term = binary_to_term(BinTerm);
+        <<Size:8,SizeTerm:Size/binary,BinTerm/binary>> ->
+            {'$size',TermSize} = binary_to_term(SizeTerm),
+            TermSize = byte_size(BinTerm),
+            Term = binary_to_term(BinTerm)
+    end.
+
+%% Copy of observer_backend:ttb_make_binary/1. During development of
+%% the local CSE optimization this function was incorrectly optimized.
+
+cse_make_binary(Term) ->
+    B = term_to_binary(Term),
+    SizeB = byte_size(B),
+    if SizeB > 255 ->
+            SB = term_to_binary({'$size',SizeB}),
+            <<(byte_size(SB)):8, SB/binary, B/binary>>;
+       true ->
+            <<SizeB:8, B/binary>>
+    end.
+
+local_cse_3(X, Y) ->
+    %% The following expression was incorrectly transformed to {[X,Y],[X,Y]}
+    %% during development of the local CSE optimization.
+
+    {[Y],[X,Y]}.
+
+local_cse_4() ->
+    do_local_cse_4(2000, self(), {self(), write_cache}).
+
+do_local_cse_4(X, Y, Z) ->
+    {X,Y,Z}.
+
+%% Tests previously found bugs when running beam_block the second time.
+
+second_block_pass(_Config) ->
+    [#{dts:=5.0}] = second_1([#{dts => 10.0}], 2.0),
+    ok.
+
+second_1(Fs, TS) ->
+    [F#{dts=>DTS / TS} || #{dts:=DTS} = F <- Fs].
+
 %%%
 %%% Common functions.
 %%%
diff --git a/lib/compiler/test/beam_type_SUITE.erl b/lib/compiler/test/beam_type_SUITE.erl
index 86146c614f..541075af2a 100644
--- a/lib/compiler/test/beam_type_SUITE.erl
+++ b/lib/compiler/test/beam_type_SUITE.erl
@@ -22,7 +22,8 @@
 -export([all/0,suite/0,groups/0,init_per_suite/1,end_per_suite/1,
 	 init_per_group/2,end_per_group/2,
 	 integers/1,coverage/1,booleans/1,setelement/1,cons/1,
-	 tuple/1,record_float/1,binary_float/1,float_compare/1]).
+	 tuple/1,record_float/1,binary_float/1,float_compare/1,
+	 arity_checks/1,elixir_binaries/1]).
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
@@ -40,7 +41,9 @@ groups() ->
        tuple,
        record_float,
        binary_float,
-       float_compare
+       float_compare,
+       arity_checks,
+       elixir_binaries
       ]}].
 
 init_per_suite(Config) ->
@@ -64,6 +67,15 @@ integers(_Config) ->
 
     college = do_integers_3(),
 
+    zero = do_integers_4(<<0:1>>, 0),
+    one = do_integers_4(<<1:1>>, 0),
+    other = do_integers_4(<<1:1>>, 2),
+
+    zero = do_integers_5(0, 0),
+    one = do_integers_5(0, 1),
+    two = do_integers_5(0, 2),
+    three = do_integers_5(0, 3),
+
     ok.
 
 do_integers_1(B0) ->
@@ -86,7 +98,31 @@ do_integers_3() ->
 	1 -> 0
     end.
 
-coverage(_Config) ->
+do_integers_4(<<X:1,T/bits>>, C) ->
+    %% Binary matching gives the range 0-1 for X.
+    %% The range for `X bor C` is unknown. It must not be inherited
+    %% from X. (`X bor C` will reuse the register used for X.)
+    case X bor C of
+        0 -> do_integers_4(T, C, zero);
+        1 -> do_integers_4(T, C, one);
+        _ -> do_integers_4(T, C, other)
+    end.
+
+do_integers_4(_, _, Res) ->
+    Res.
+
+do_integers_5(X0, Y0) ->
+    %% X and Y will use the same register.
+    X = X0 band 1,
+    Y = Y0 band 3,
+    case Y of
+        0 -> zero;
+        1 -> one;
+        2 -> two;
+        3 -> three
+    end.
+
+coverage(Config) ->
     {'EXIT',{badarith,_}} = (catch id(1) bsl 0.5),
     {'EXIT',{badarith,_}} = (catch id(2.0) bsl 2),
     {'EXIT',{badarith,_}} = (catch a + 0.5),
@@ -97,6 +133,29 @@ coverage(_Config) ->
     id(id(42) band 387439739874298734983787934283479243879),
     id(-1 band id(13)),
 
+    error = if
+                is_map(Config), is_integer(Config) -> ok;
+                true -> error
+            end,
+    error = if
+                is_map(Config), is_atom(Config) -> ok;
+                true -> error
+            end,
+    error = if
+                is_map(Config), is_tuple(Config) -> ok;
+                true -> error
+            end,
+    error = if
+                is_integer(Config), is_bitstring(Config) -> ok;
+                true -> error
+            end,
+
+    ok = case Config of
+             <<_>> when is_binary(Config) ->
+                 impossible;
+             [_|_] ->
+                 ok
+         end,
     ok.
 
 booleans(_Config) ->
@@ -171,6 +230,68 @@ do_float_compare(X) ->
         _T -> Y > 0
     end.
 
+arity_checks(_Config) ->
+    %% ERL-549: an unsafe optimization removed a test_arity instruction,
+    %% causing the following to return 'broken' instead of 'ok'.
+    ok = do_record_arity_check({rgb, 255, 255, 255, 1}),
+    ok = do_tuple_arity_check({255, 255, 255, 1}).
+ 
+-record(rgb, {r = 255, g = 255, b = 255}).
+
+do_record_arity_check(RGB) when
+        (element(2, RGB) >= 0), (element(2, RGB) =< 255),
+        (element(3, RGB) >= 0), (element(3, RGB) =< 255),
+        (element(4, RGB) >= 0), (element(4, RGB) =< 255) ->
+    if
+        element(1, RGB) =:= rgb, is_record(RGB, rgb) -> broken;
+        true -> ok
+    end.
+
+do_tuple_arity_check(RGB) when is_tuple(RGB),
+        (element(1, RGB) >= 0), (element(1, RGB) =< 255),
+        (element(2, RGB) >= 0), (element(2, RGB) =< 255),
+        (element(3, RGB) >= 0), (element(3, RGB) =< 255) ->
+    case RGB of
+        {255, _, _} -> broken;
+        _ -> ok
+    end.
+
+elixir_binaries(_Config) ->
+    <<"foo blitzky baz">> = elixir_binary_1(<<"blitzky">>),
+    <<"foo * baz">> = elixir_binary_2($*),
+    <<7:4,755:10>> = elixir_bitstring_3(<<755:10>>),
+    ok.
+
+elixir_binary_1(Bar) when is_binary(Bar) ->
+    <<"foo ",
+      case Bar of
+          Rewrite when is_binary(Rewrite) ->
+              Rewrite;
+          Rewrite ->
+              list_to_binary(Rewrite)
+      end/binary,
+      " baz">>.
+
+elixir_binary_2(Arg) ->
+    Bin = <<Arg>>,
+    <<"foo ",
+      case Bin of
+          Rewrite when is_binary(Rewrite) ->
+              Rewrite;
+          Rewrite ->
+              list_to_binary:to_string(Rewrite)
+      end/binary,
+      " baz">>.
+
+elixir_bitstring_3(Bar) when is_bitstring(Bar) ->
+    <<7:4,
+      case Bar of
+          Rewrite when is_bitstring(Rewrite) ->
+              Rewrite;
+          Rewrite ->
+              list_to_bitstring(Rewrite)
+      end/bitstring>>.
+
 
 id(I) ->
     I.
diff --git a/lib/compiler/test/beam_utils_SUITE.erl b/lib/compiler/test/beam_utils_SUITE.erl
index 710cb050d4..7686e69b63 100644
--- a/lib/compiler/test/beam_utils_SUITE.erl
+++ b/lib/compiler/test/beam_utils_SUITE.erl
@@ -24,7 +24,8 @@
 	 apply_fun/1,apply_mf/1,bs_init/1,bs_save/1,
 	 is_not_killed/1,is_not_used_at/1,
 	 select/1,y_catch/1,otp_8949_b/1,liveopt/1,coverage/1,
-	 y_registers/1]).
+         y_registers/1,user_predef/1,scan_f/1,cafu/1,
+         receive_label/1,read_size_file_version/1]).
 -export([id/1]).
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
@@ -46,7 +47,11 @@ groups() ->
        otp_8949_b,
        liveopt,
        coverage,
-       y_registers
+       y_registers,
+       user_predef,
+       scan_f,
+       cafu,
+       read_size_file_version
       ]}].
 
 init_per_suite(Config) ->
@@ -117,6 +122,15 @@ bs_init(_Config) ->
     {'EXIT',{badarg,_}} = (catch do_bs_init_2([0.5])),
     {'EXIT',{badarg,_}} = (catch do_bs_init_2([-1])),
     {'EXIT',{badarg,_}} = (catch do_bs_init_2([1 bsl 32])),
+
+    <<>> = do_bs_init_3({tag,0}, 0, 0),
+    <<0>> = do_bs_init_3({tag,0}, 2, 1),
+
+    <<"_build/shared">> = do_bs_init_4([], false),
+    <<"abc/shared">> = do_bs_init_4(<<"abc">>, false),
+    <<"foo/foo">> = do_bs_init_4(<<"foo">>, true),
+    error = do_bs_init_4([], not_boolean),
+
     ok.
 
 do_bs_init_1([?MODULE], Sz) ->
@@ -134,6 +148,45 @@ do_bs_init_2(SigNos) ->
 	    erlang:error(badarg)
     >>.
 
+do_bs_init_3({tag,Pos}, Offset, Len) ->
+    N0 = Offset - Pos,
+    N = if N0 > Len -> Len;
+           true -> N0
+        end,
+    <<0:N/unit:8>>.
+
+do_bs_init_4(Arg1, Arg2) ->
+    Build =
+        case id(Arg1) of
+            X when X =:= [] orelse X =:= false -> <<"_build">>;
+            X -> X
+        end,
+    case id(Arg2) of
+        true ->
+            id(<<case Build of
+                     Rewrite when is_binary(Rewrite) ->
+                         Rewrite;
+                     Rewrite ->
+                         id(Rewrite)
+                 end/binary,
+                 "/",
+                 case id(<<"foo">>) of
+                     Rewrite when is_binary(Rewrite) ->
+                         Rewrite;
+                     Rewrite ->
+                         id(Rewrite)
+                 end/binary>>);
+        false ->
+            id(<<case Build of
+                     Rewrite when is_binary(Rewrite) ->
+                         Rewrite;
+                     Rewrite ->
+                         id(Rewrite)
+                 end/binary,
+                 "/shared">>);
+        Other ->
+            error
+    end.
 
 bs_save(_Config) ->
     {a,30,<<>>} = do_bs_save(<<1:1,30:5>>),
@@ -376,5 +429,83 @@ do(A, B) -> {A,B}.
 appointment(#{"resolution" := Url}) ->
     do(receive _ -> Url end, #{true => Url}).
 
+%% From epp.erl.
+user_predef(_Config) ->
+    #{key:="value"} = user_predef({key,"value"}, #{}),
+    #{key:="value"} = user_predef({key,"value"}, #{key=>defined}),
+    error = user_predef({key,"value"}, #{key=>[defined]}),
+    ok.
+
+user_predef({M,Val}, Ms) ->
+    case Ms of
+	#{M:=Defs} when is_list(Defs) ->
+	    error;
+	_ ->
+	    Ms#{M=>Val}
+    end.
+
+%% From disk_log_1.erl.
+scan_f(_Config) ->
+    {1,<<>>,[]} = scan_f(<<1:32>>, 1, []),
+    {1,<<>>,[<<156>>]} = scan_f(<<1:32,156,1:32>>, 1, []),
+    ok.
+
+scan_f(<<Size:32,Tail/binary>>, FSz, Acc) when Size =< FSz ->
+    case Tail of
+        <<BinTerm:Size/binary,Tail2/binary>> ->
+            scan_f(Tail2, FSz, [BinTerm | Acc]);
+        _ ->
+            {Size,Tail,Acc}
+    end.
+
+%% From file_io_server.erl.
+cafu(_Config) ->
+    error = cafu(<<42:32>>, -1, 0, {utf32,big}),
+    error = cafu(<<42:32>>, 10, 0, {utf32,big}),
+    error = cafu(<<42:32>>, -1, 0, {utf32,little}),
+    ok.
+
+cafu(<<_/big-utf32,Rest/binary>>, N, Count, {utf32,big}) when N < 0 ->
+    cafu(Rest, -1, Count+1, {utf32,big});
+cafu(<<_/big-utf32,Rest/binary>>, N, Count, {utf32,big}) ->
+    cafu(Rest, N-1, Count+1, {utf32,big});
+cafu(<<_/little-utf32,Rest/binary>>, N, Count, {utf32,little}) when N < 0 ->
+    cafu(Rest, -1, Count+1, {utf32,little});
+cafu(_, _, _, _) ->
+    error.
+
+-record(rec_label, {bool}).
+
+receive_label(_Config) ->
+    Pid = spawn_link(fun() -> do_receive_label(#rec_label{bool=true}) end),
+    Msg = {a,b,c},
+    Pid ! {self(),Msg},
+    receive
+        {ok,Msg} ->
+            unlink(Pid),
+            exit(Pid, die),
+            ok
+    end.
+
+do_receive_label(Rec) ->
+    receive
+        {From,Message} when Rec#rec_label.bool ->
+            From ! {ok,Message},
+            do_receive_label(Rec)
+    end.
+
+read_size_file_version(_Config) ->
+    ok = do_read_size_file_version({ok,<<42>>}),
+    {ok,7777} = do_read_size_file_version({ok,<<7777:32>>}),
+    ok.
+
+do_read_size_file_version(E) ->
+    case E of
+	{ok,<<Version>>} when Version =:= 42 ->
+            ok;
+	{ok,<<MaxFiles:32>>} ->
+            {ok,MaxFiles}
+    end.
+
 %% The identity function.
 id(I) -> I.
diff --git a/lib/compiler/test/beam_validator_SUITE.erl b/lib/compiler/test/beam_validator_SUITE.erl
index c23514b36b..b8fff7b100 100644
--- a/lib/compiler/test/beam_validator_SUITE.erl
+++ b/lib/compiler/test/beam_validator_SUITE.erl
@@ -33,8 +33,8 @@
 	 state_after_fault_in_catch/1,no_exception_in_catch/1,
 	 undef_label/1,illegal_instruction/1,failing_gc_guard_bif/1,
 	 map_field_lists/1,cover_bin_opt/1,
-	 val_dsetel/1]).
-	 
+	 val_dsetel/1,bad_tuples/1,bad_try_catch_nesting/1]).
+
 -include_lib("common_test/include/ct.hrl").
 
 init_per_testcase(Case, Config) when is_atom(Case), is_list(Config) ->
@@ -61,7 +61,8 @@ groups() ->
        freg_state,bad_bin_match,bad_dsetel,
        state_after_fault_in_catch,no_exception_in_catch,
        undef_label,illegal_instruction,failing_gc_guard_bif,
-       map_field_lists,cover_bin_opt,val_dsetel]}].
+       map_field_lists,cover_bin_opt,val_dsetel,
+       bad_tuples,bad_try_catch_nesting]}].
 
 init_per_suite(Config) ->
     Config.
@@ -421,9 +422,9 @@ try_bin_opt(Mod) ->
     try
 	do_bin_opt(Mod)
     catch
-	Class:Error ->
+	Class:Error:Stk ->
 	    io:format("~p: ~p ~p\n~p\n",
-		      [Mod,Class,Error,erlang:get_stacktrace()]),
+		      [Mod,Class,Error,Stk]),
 	    error
     end.
 
@@ -509,6 +510,27 @@ destroy_reg({Tag,N}) ->
 	    {y,N+1}
     end.
 
+bad_tuples(Config) ->
+    Errors = do_val(bad_tuples, Config),
+    [{{bad_tuples,heap_overflow,1},
+      {{put,{x,0}},8,{heap_overflow,{left,0},{wanted,1}}}},
+     {{bad_tuples,long,2},
+      {{put,{atom,too_long}},8,not_building_a_tuple}},
+     {{bad_tuples,self_referential,1},
+      {{put,{x,1}},7,{tuple_in_progress,{x,1}}}},
+     {{bad_tuples,short,1},
+      {{move,{x,1},{x,0}},7,{tuple_in_progress,{x,1}}}}] = Errors,
+
+    ok.
+
+bad_try_catch_nesting(Config) ->
+    Errors = do_val(bad_try_catch_nesting, Config),
+    [{{bad_try_catch_nesting,main,2},
+      {{'try',{y,2},{f,3}},
+       7,
+       {bad_try_catch_nesting,{y,2},[{{y,1},{trytag,[5]}}]}}}] = Errors,
+    ok.
+
 %%%-------------------------------------------------------------------------
 
 transform_remove(Remove, Module) ->
diff --git a/lib/compiler/test/beam_validator_SUITE_data/bad_try_catch_nesting.S b/lib/compiler/test/beam_validator_SUITE_data/bad_try_catch_nesting.S
new file mode 100644
index 0000000000..9f1b21a17b
--- /dev/null
+++ b/lib/compiler/test/beam_validator_SUITE_data/bad_try_catch_nesting.S
@@ -0,0 +1,64 @@
+{module, bad_try_catch_nesting}.  %% version = 0
+
+{exports, [{main,2},{module_info,0},{module_info,1}]}.
+
+{attributes, []}.
+
+{labels, 11}.
+
+
+{function, main, 2, 2}.
+  {label,1}.
+    {line,[{location,"bad_try_catch_nesting.erl",4}]}.
+    {func_info,{atom,bad_try_catch_nesting},{atom,main},2}.
+  {label,2}.
+    {allocate_zero,3,2}.
+    {'try',{y,1},{f,5}}.
+    {move,{x,1},{y,0}}.
+    {'try',{y,2},{f,3}}.
+    {line,[{location,"bad_try_catch_nesting.erl",7}]}.
+    {call_fun,0}.
+    {try_end,{y,2}}.
+    {jump,{f,4}}.
+  {label,3}.
+    {try_case,{y,2}}.
+    {test,is_ne_exact,{f,4},[{x,0},{atom,error}]}.
+    {line,[]}.
+    {bif,raise,{f,0},[{x,2},{x,1}],{x,0}}.
+  {label,4}.
+    {move,{y,0},{x,0}}.
+    {kill,{y,0}}.
+    {line,[{location,"bad_try_catch_nesting.erl",12}]}.
+    {call_fun,0}.
+    {try_end,{y,1}}.
+    {deallocate,3}.
+    return.
+  {label,5}.
+    {try_case,{y,1}}.
+    {test,is_eq_exact,{f,6},[{x,0},{atom,throw}]}.
+    {deallocate,3}.
+    return.
+  {label,6}.
+    {line,[]}.
+    {bif,raise,{f,0},[{x,2},{x,1}],{x,0}}.
+
+
+{function, module_info, 0, 8}.
+  {label,7}.
+    {line,[]}.
+    {func_info,{atom,bad_try_catch_nesting},{atom,module_info},0}.
+  {label,8}.
+    {move,{atom,bad_try_catch_nesting},{x,0}}.
+    {line,[]}.
+    {call_ext_only,1,{extfunc,erlang,get_module_info,1}}.
+
+
+{function, module_info, 1, 10}.
+  {label,9}.
+    {line,[]}.
+    {func_info,{atom,bad_try_catch_nesting},{atom,module_info},1}.
+  {label,10}.
+    {move,{x,0},{x,1}}.
+    {move,{atom,bad_try_catch_nesting},{x,0}}.
+    {line,[]}.
+    {call_ext_only,2,{extfunc,erlang,get_module_info,2}}.
diff --git a/lib/compiler/test/beam_validator_SUITE_data/bad_tuples.S b/lib/compiler/test/beam_validator_SUITE_data/bad_tuples.S
new file mode 100644
index 0000000000..7980241c37
--- /dev/null
+++ b/lib/compiler/test/beam_validator_SUITE_data/bad_tuples.S
@@ -0,0 +1,88 @@
+{module, bad_tuples}.  %% version = 0
+
+{exports, [{heap_overflow,1},
+           {long,2},
+           {module_info,0},
+           {module_info,1},
+           {self_referential,1},
+           {short,1}]}.
+
+{attributes, []}.
+
+{labels, 13}.
+
+
+{function, short, 1, 2}.
+  {label,1}.
+    {line,[{location,"bad_tuples.erl",4}]}.
+    {func_info,{atom,bad_tuples},{atom,short},1}.
+  {label,2}.
+    {test_heap,3,1}.
+    {put_tuple,2,{x,1}}.
+    {put,{atom,ok}}.
+    {move,{x,1},{x,0}}.
+    return.
+
+
+{function, long, 2, 4}.
+  {label,3}.
+    {line,[{location,"bad_tuples.erl",7}]}.
+    {func_info,{atom,bad_tuples},{atom,long},2}.
+  {label,4}.
+    {test_heap,6,2}.
+    {put_tuple,2,{x,2}}.
+    {put,{x,0}}.
+    {put,{x,1}}.
+    {put,{atom,too_long}}.
+    {put_tuple,2,{x,0}}.
+    {put,{atom,ok}}.
+    {put,{x,2}}.
+    return.
+
+
+{function, heap_overflow, 1, 6}.
+  {label,5}.
+    {line,[{location,"bad_tuples.erl",10}]}.
+    {func_info,{atom,bad_tuples},{atom,heap_overflow},1}.
+  {label,6}.
+    {test_heap,3,1}.
+    {put_tuple,2,{x,1}}.
+    {put,{atom,ok}}.
+    {put,{x,0}}.
+    {put,{x,0}}.
+    {move,{x,1},{x,0}}.
+    return.
+
+
+{function, self_referential, 1, 8}.
+  {label,7}.
+    {line,[{location,"bad_tuples.erl",13}]}.
+    {func_info,{atom,bad_tuples},{atom,self_referential},1}.
+  {label,8}.
+    {test_heap,3,1}.
+    {put_tuple,2,{x,1}}.
+    {put,{atom,ok}}.
+    {put,{x,1}}.
+    {move,{x,1},{x,0}}.
+    return.
+
+
+{function, module_info, 0, 10}.
+  {label,9}.
+    {line,[]}.
+    {func_info,{atom,bad_tuples},{atom,module_info},0}.
+  {label,10}.
+    {move,{atom,bad_tuples},{x,0}}.
+    {line,[]}.
+    {call_ext_only,1,{extfunc,erlang,get_module_info,1}}.
+
+
+{function, module_info, 1, 12}.
+  {label,11}.
+    {line,[]}.
+    {func_info,{atom,bad_tuples},{atom,module_info},1}.
+  {label,12}.
+    {move,{x,0},{x,1}}.
+    {move,{atom,bad_tuples},{x,0}}.
+    {line,[]}.
+    {call_ext_only,2,{extfunc,erlang,get_module_info,2}}.
diff --git a/lib/compiler/test/bs_construct_SUITE.erl b/lib/compiler/test/bs_construct_SUITE.erl
index da99aba346..7c5ad97f7e 100644
--- a/lib/compiler/test/bs_construct_SUITE.erl
+++ b/lib/compiler/test/bs_construct_SUITE.erl
@@ -303,7 +303,14 @@ fail(Config) when is_list(Config) ->
     {'EXIT',{badarg,_}} = (catch <<42.0/integer>>),
     {'EXIT',{badarg,_}} = (catch <<42/binary>>),
     {'EXIT',{badarg,_}} = (catch <<an_atom/integer>>),
-    
+
+    %% Bad literal sizes
+    Bin = i(<<>>),
+    {'EXIT',{badarg,_}} = (catch <<0:(-1)>>),
+    {'EXIT',{badarg,_}} = (catch <<Bin/binary,0:(-1)>>),
+    {'EXIT',{badarg,_}} = (catch <<0:(-(1 bsl 100))>>),
+    {'EXIT',{badarg,_}} = (catch <<Bin/binary,0:(-(1 bsl 100))>>),
+
     ok.
 
 float_bin(Config) when is_list(Config) ->
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl
index ad48d4c0b7..235956a714 100644
--- a/lib/compiler/test/bs_match_SUITE.erl
+++ b/lib/compiler/test/bs_match_SUITE.erl
@@ -39,7 +39,8 @@
 	 match_string_opt/1,select_on_integer/1,
 	 map_and_binary/1,unsafe_branch_caching/1,
 	 bad_literals/1,good_literals/1,constant_propagation/1,
-	 parse_xml/1,get_payload/1,escape/1,num_slots_different/1]).
+	 parse_xml/1,get_payload/1,escape/1,num_slots_different/1,
+         beam_bsm/1,guard/1,is_ascii/1,non_opt_eq/1]).
 
 -export([coverage_id/1,coverage_external_ignore/2]).
 
@@ -71,7 +72,8 @@ groups() ->
        match_string_opt,select_on_integer,
        map_and_binary,unsafe_branch_caching,
        bad_literals,good_literals,constant_propagation,parse_xml,
-       get_payload,escape,num_slots_different]}].
+       get_payload,escape,num_slots_different,
+       beam_bsm,guard,is_ascii,non_opt_eq]}].
 
 
 init_per_suite(Config) ->
@@ -676,6 +678,10 @@ coverage(Config) when is_list(Config) ->
     <<>> = coverage_per_key(<<4:32>>),
     <<$a,$b,$c>> = coverage_per_key(<<7:32,"abc">>),
 
+    binary = coverage_bitstring(<<>>),
+    binary = coverage_bitstring(<<7>>),
+    bitstring = coverage_bitstring(<<7:4>>),
+    other = coverage_bitstring([a]),
     ok.
 
 coverage_fold(Fun, Acc, <<H,T/binary>>) ->
@@ -766,6 +772,10 @@ coverage_per_key(<<BinSize:32,Bin/binary>> = B) ->
     true = (byte_size(B) =:= BinSize),
     Bin.
 
+coverage_bitstring(Bin) when is_binary(Bin) -> binary;
+coverage_bitstring(<<_/bitstring>>) -> bitstring;
+coverage_bitstring(_) -> other.
+
 multiple_uses(Config) when is_list(Config) ->
     {344,62879,345,<<245,159,1,89>>} = multiple_uses_1(<<1,88,245,159,1,89>>),
     true = multiple_uses_2(<<0,0,197,18>>),
@@ -799,7 +809,7 @@ multiple_uses_cmp(<<_:16>>, <<_:16>>) -> false.
 first_after(Data, Offset) ->
     case byte_size(Data) > Offset of
 	false ->
-	    {First, Rest} = {ok, ok},
+	    {_First, _Rest} = {ok, ok},
 	    ok;
 	true ->
 	    <<_:Offset/binary, Rest/binary>> = Data,
@@ -1513,7 +1523,7 @@ is_next_char_whitespace(<<C/utf8,_/binary>>) ->
         {this_hdr = 17,
          ext_hdr_opts}).
 
-get_payload(Config) ->
+get_payload(_Config) ->
     <<3445:48>> = do_get_payload(#ext_header{ext_hdr_opts = <<3445:48>>}),
     {'EXIT',_} = (catch do_get_payload(#ext_header{})),
     ok.
@@ -1572,6 +1582,101 @@ lgettext(<<"de">>, <<"navigation">>, <<"Results">>) ->
 lgettext(<<"de">>, <<"navigation">>, <<"Resources">>) ->
     {ok, <<"Ressourcen">>}.
 
+%% Test more code in beam_bsm.
+beam_bsm(_Config) ->
+    true = check_bitstring_list(<<1:1,0:1,1:1,1:1>>, [1,0,1,1]),
+    false = check_bitstring_list(<<1:1,0:1,1:1,1:1>>, [0]),
+
+    true = bsm_validate_scheme(<<>>),
+    true = bsm_validate_scheme(<<5,10>>),
+    false = bsm_validate_scheme(<<5,10,11,12>>),
+    true = bsm_validate_scheme([]),
+    true = bsm_validate_scheme([5,10]),
+    false = bsm_validate_scheme([5,6,7]),
+
+    <<1,2,3>> = bsm_must_save_and_not_save(<<1,2,3>>, []),
+    D = fun(N) -> 2*N end,
+    [2,4|<<3>>] = bsm_must_save_and_not_save(<<1,2,3>>, [D,D]),
+
+    ok.
+
+check_bitstring_list(<<H:1,T1/bitstring>>, [H|T2]) ->
+    check_bitstring_list(T1, T2);
+check_bitstring_list(<<>>, []) ->
+    true;
+check_bitstring_list(_, _) ->
+    false.
+
+bsm_validate_scheme([]) -> true;
+bsm_validate_scheme([H|T]) ->
+    case bsm_is_scheme(H) of
+        true -> bsm_validate_scheme(T);
+        false -> false
+    end;
+bsm_validate_scheme(<<>>) -> true;
+bsm_validate_scheme(<<H, Rest/binary>>) ->
+    case bsm_is_scheme(H) of
+        true -> bsm_validate_scheme(Rest);
+        false -> false
+    end.
+
+bsm_is_scheme(Int) ->
+    Int rem 5 =:= 0.
+
+%% NOT OPTIMIZED: different control paths use different positions in the binary
+bsm_must_save_and_not_save(Bin, []) ->
+    Bin;
+bsm_must_save_and_not_save(<<H,T/binary>>, [F|Fs]) ->
+    [F(H)|bsm_must_save_and_not_save(T, Fs)];
+bsm_must_save_and_not_save(<<>>, []) ->
+    [].
+
+guard(_Config) ->
+    _Tuple = id({a,b}),
+    ok = guard_1(<<1,2,3>>, {1,2,3}),
+    ok = guard_2(<<42>>, #{}),
+    ok.
+
+%% Cover handling of #k_put{} in v3_codegen:bsm_rename_ctx/4.
+guard_1(<<A,B,C>>, Tuple) when Tuple =:= {A,B,C} ->
+    ok.
+
+%% Cover handling of #k_call{} in v3_codegen:bsm_rename_ctx/4.
+guard_2(<<_>>, Healing) when Healing#{[] => Healing} =:= #{[] => #{}} ->
+    ok.
+
+is_ascii(_Config) ->
+    true = do_is_ascii(<<>>),
+    true = do_is_ascii(<<"string">>),
+    false = do_is_ascii(<<1024/utf8>>),
+    {'EXIT',{function_clause,_}} = (catch do_is_ascii(<<$A,0:3>>)),
+    {'EXIT',{function_clause,_}} = (catch do_is_ascii(<<16#80,0:3>>)),
+    ok.
+
+do_is_ascii(<<>>) ->
+    true;
+do_is_ascii(<<C,_/binary>>) when C >= 16#80 ->
+    %% This clause must fail to match if the size of the argument in
+    %% bits is not divisible by 8. Beware of unsafe optimizations.
+    false;
+do_is_ascii(<<_, T/binary>>) ->
+    do_is_ascii(T).
+
+non_opt_eq(_Config) ->
+    true = non_opt_eq([], <<>>),
+    true = non_opt_eq([$a], <<$a>>),
+    false = non_opt_eq([$a], <<$b>>),
+    ok.
+
+%% An example from the Efficiency Guide. It used to be not optimized,
+%% but now it can be optimized.
+
+non_opt_eq([H|T1], <<H,T2/binary>>) ->
+    non_opt_eq(T1, T2);
+non_opt_eq([_|_], <<_,_/binary>>) ->
+    false;
+non_opt_eq([], <<>>) ->
+    true.
 
 check(F, R) ->
     R = F().
diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl
index 25983c6012..eee5bc733f 100644
--- a/lib/compiler/test/compile_SUITE.erl
+++ b/lib/compiler/test/compile_SUITE.erl
@@ -120,9 +120,19 @@ file_1(Config) when is_list(Config) ->
     true = exists(Target),
     passed = run(Target, test, []),
 
+    %% Test option 'deterministic' as a compiler attribute.
+    Det = deterministic_module,
+    {DetPath, DetTarget} = get_files(Config, Det, "det_target"),
+    {ok,Det,DetCode} = compile:file(DetPath, [binary]),
+    {module,Det} = code:load_binary(Det, "", DetCode),
+    [{version,_}] = Det:module_info(compile),
+    true = code:delete(Det),
+    false = code:purge(Det),
+
     %% Cleanup.
     ok = file:delete(Target),
     ok = file:del_dir(filename:dirname(Target)),
+    ok = file:del_dir(filename:dirname(DetTarget)),
 
     %% There should not be any messages in the messages.
     receive
@@ -375,7 +385,6 @@ do_file_listings(DataDir, PrivDir, [File|Files]) ->
     do_listing(Simple, TargetDir, dcbsm, ".core_bsm"),
     do_listing(Simple, TargetDir, dsetel, ".dsetel"),
     do_listing(Simple, TargetDir, dkern, ".kernel"),
-    do_listing(Simple, TargetDir, dlife, ".life"),
     do_listing(Simple, TargetDir, dcg, ".codegen"),
     do_listing(Simple, TargetDir, dblk, ".block"),
     do_listing(Simple, TargetDir, dexcept, ".except"),
@@ -399,6 +408,7 @@ do_file_listings(DataDir, PrivDir, [File|Files]) ->
     ok = file:delete(filename:join(Listings, File ++ ".core")),
     do_listing(Simple, TargetDir, to_core, ".core"),
     do_listing(Simple, TargetDir, to_kernel, ".kernel"),
+    do_listing(Simple, TargetDir, to_dis, ".dis"),
 
     %% Final clean up.
     lists:foreach(fun(F) -> ok = file:delete(F) end,
@@ -414,6 +424,7 @@ listings_big(Config) when is_list(Config) ->
     do_listing(Big, TargetDir, 'E'),
     do_listing(Big, TargetDir, 'P'),
     do_listing(Big, TargetDir, dkern, ".kernel"),
+    do_listing(Big, TargetDir, to_dis, ".dis"),
 
     TargetNoext = filename:rootname(Target, code:objfile_extension()),
     {ok,big} = compile:file(TargetNoext, [from_asm,{outdir,TargetDir}]),
@@ -489,9 +500,8 @@ do_kernel_listing({M,A}) ->
 	    io:format("*** compilation failure '~p' for module ~s\n",
 		      [Error,M]),
 	    error;
-	Class:Error ->
-	    io:format("~p: ~p ~p\n~p\n",
-		      [M,Class,Error,erlang:get_stacktrace()]),
+	Class:Error:Stk ->
+	    io:format("~p: ~p ~p\n~p\n", [M,Class,Error,Stk]),
 	    error
     end.
 
@@ -891,9 +901,8 @@ do_core_pp({M,A}, Outdir) ->
 	    io:format("*** compilation failure '~p' for module ~s\n",
 		      [Error,M]),
 	    error;
-	Class:Error ->
-	    io:format("~p: ~p ~p\n~p\n",
-		      [M,Class,Error,erlang:get_stacktrace()]),
+	Class:Error:Stk ->
+	    io:format("~p: ~p ~p\n~p\n", [M,Class,Error,Stk]),
 	    error
     end.
 
@@ -950,9 +959,8 @@ do_core_roundtrip(Beam, Outdir) ->
 	    io:format("*** compilation failure '~p' for file ~s\n",
 		      [Error,Beam]),
 	    error;
-	Class:Error ->
-	    io:format("~p: ~p ~p\n~p\n",
-		      [Beam,Class,Error,erlang:get_stacktrace()]),
+	Class:Error:Stk ->
+	    io:format("~p: ~p ~p\n~p\n", [Beam,Class,Error,Stk]),
 	    error
     end.
 
@@ -1137,9 +1145,8 @@ do_asm(Beam, Outdir) ->
 			  [Other,AsmFile]),
 		error
 	end
-    catch Class:Error ->
-	    io:format("~p: ~p ~p\n~p\n",
-		      [M,Class,Error,erlang:get_stacktrace()]),
+    catch Class:Error:Stk ->
+	    io:format("~p: ~p ~p\n~p\n", [M,Class,Error,Stk]),
 	    error
     end.
 
@@ -1156,9 +1163,8 @@ do_opt_guards(Beam) ->
     try
 	{ok,M,Asm} = compile:forms(A, ['S']),
 	do_opt_guards_mod(Asm)
-    catch Class:Error ->
-	    io:format("~p: ~p ~p\n~p\n",
-		      [M,Class,Error,erlang:get_stacktrace()]),
+    catch Class:Error:Stk ->
+	    io:format("~p: ~p ~p\n~p\n", [M,Class,Error,Stk]),
 	    error
     end.
 
@@ -1319,10 +1325,13 @@ do_warnings_2([], Next, F) ->
 %% pre-loads the modules that are used by a typical compilation.
 
 pre_load_check(Config) ->
-    case test_server:is_cover() of
-	true ->
+    case {test_server:is_cover(),code:module_info(native)} of
+	{true,_} ->
 	    {skip,"Cover is running"};
-	false ->
+        {false,true} ->
+            %% Tracing won't work.
+            {skip,"'code' is native-compiled"};
+	{false,false} ->
 	    try
 		do_pre_load_check(Config)
 	    after
@@ -1446,19 +1455,21 @@ env_compiler_options(_Config) ->
 bc_options(Config) ->
     DataDir = proplists:get_value(data_dir, Config),
 
-    101 = highest_opcode(DataDir, small_float, [no_line_info]),
+    101 = highest_opcode(DataDir, small_float, [no_get_hd_tl,no_line_info]),
 
     103 = highest_opcode(DataDir, big,
-                         [no_record_opt,no_line_info,no_stack_trimming]),
+                         [no_get_hd_tl,no_record_opt,
+                          no_line_info,no_stack_trimming]),
 
-    125 = highest_opcode(DataDir, small_float, [no_line_info,no_float_opt]),
+    125 = highest_opcode(DataDir, small_float,
+                         [no_get_hd_tl,no_line_info,no_float_opt]),
 
     132 = highest_opcode(DataDir, small,
-                         [no_record_opt,no_float_opt,no_line_info]),
+                         [no_get_hd_tl,no_record_opt,no_float_opt,no_line_info]),
 
-    136 = highest_opcode(DataDir, big, [no_record_opt,no_line_info]),
+    136 = highest_opcode(DataDir, big, [no_get_hd_tl,no_record_opt,no_line_info]),
 
-    153 = highest_opcode(DataDir, big, [no_record_opt]),
+    153 = highest_opcode(DataDir, big, [no_get_hd_tl,no_record_opt]),
     153 = highest_opcode(DataDir, big, [r16]),
     153 = highest_opcode(DataDir, big, [r17]),
     153 = highest_opcode(DataDir, big, [r18]),
@@ -1469,9 +1480,10 @@ bc_options(Config) ->
     158 = highest_opcode(DataDir, small_maps, [r17]),
     158 = highest_opcode(DataDir, small_maps, [r18]),
     158 = highest_opcode(DataDir, small_maps, [r19]),
+    158 = highest_opcode(DataDir, small_maps, [r20]),
     158 = highest_opcode(DataDir, small_maps, []),
 
-    159 = highest_opcode(DataDir, big, []),
+    163 = highest_opcode(DataDir, big, []),
 
     ok.
 
diff --git a/lib/compiler/test/compile_SUITE_data/big.erl b/lib/compiler/test/compile_SUITE_data/big.erl
index 2e54ee8660..1db07755a1 100644
--- a/lib/compiler/test/compile_SUITE_data/big.erl
+++ b/lib/compiler/test/compile_SUITE_data/big.erl
@@ -741,3 +741,7 @@ snmp_access(suite) ->
 debug_support(suite) ->
     [  info, schema, schema, kill, lkill ].
 
+%% Cover translation of get_hd/2 to get_list/3 when option no_get_hd_tl
+%% is given.
+cover_get_hd([Hd|_]) ->
+    Hd.
diff --git a/lib/compiler/test/compile_SUITE_data/deterministic_module.erl b/lib/compiler/test/compile_SUITE_data/deterministic_module.erl
new file mode 100644
index 0000000000..5e0e29c25e
--- /dev/null
+++ b/lib/compiler/test/compile_SUITE_data/deterministic_module.erl
@@ -0,0 +1,21 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(deterministic_module).
+-compile([deterministic]).
diff --git a/lib/compiler/test/core_fold_SUITE.erl b/lib/compiler/test/core_fold_SUITE.erl
index 262967d03d..4fd1f84569 100644
--- a/lib/compiler/test/core_fold_SUITE.erl
+++ b/lib/compiler/test/core_fold_SUITE.erl
@@ -27,7 +27,7 @@
 	 multiple_aliases/1,redundant_boolean_clauses/1,
 	 mixed_matching_clauses/1,unnecessary_building/1,
 	 no_no_file/1,configuration/1,supplies/1,
-         redundant_stack_frame/1]).
+         redundant_stack_frame/1,export_from_case/1]).
 
 -export([foo/0,foo/1,foo/2,foo/3]).
 
@@ -47,7 +47,7 @@ groups() ->
        multiple_aliases,redundant_boolean_clauses,
        mixed_matching_clauses,unnecessary_building,
        no_no_file,configuration,supplies,
-       redundant_stack_frame]}].
+       redundant_stack_frame,export_from_case]}].
 
 
 init_per_suite(Config) ->
@@ -551,4 +551,38 @@ do_redundant_stack_frame(Map) ->
         end,
     {X, Y}.
 
+%% Cover some clauses in sys_core_fold:remove_first_value/2.
+
+-record(export_from_case, {val}).
+
+export_from_case(_Config) ->
+    a = export_from_case_1(true),
+    b = export_from_case_1(false),
+
+    R = #export_from_case{val=0},
+    {ok,R} = export_from_case_2(false, R),
+    {ok,#export_from_case{val=42}} = export_from_case_2(true, R),
+
+    ok.
+
+export_from_case_1(Bool) ->
+    case Bool of
+        true ->
+            id(42),
+            Result = a;
+        false ->
+            Result = b
+    end,
+    id(Result).
+
+export_from_case_2(Bool, Rec) ->
+    case Bool of
+        false ->
+            Result = Rec;
+        true ->
+            Result = Rec#export_from_case{val=42}
+    end,
+    {ok,Result}.
+
+
 id(I) -> I.
diff --git a/lib/compiler/test/guard_SUITE.erl b/lib/compiler/test/guard_SUITE.erl
index d96cfdb7ac..0d6f8c6f98 100644
--- a/lib/compiler/test/guard_SUITE.erl
+++ b/lib/compiler/test/guard_SUITE.erl
@@ -35,7 +35,8 @@
 	 basic_andalso_orelse/1,traverse_dcd/1,
 	 check_qlc_hrl/1,andalso_semi/1,t_tuple_size/1,binary_part/1,
 	 bad_constants/1,bad_guards/1,
-	 guard_in_catch/1,beam_bool_SUITE/1]).
+         guard_in_catch/1,beam_bool_SUITE/1,
+         cover_beam_dead/1]).
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
 
@@ -54,7 +55,8 @@ groups() ->
        rel_ops,rel_op_combinations,
        literal_type_tests,basic_andalso_orelse,traverse_dcd,
        check_qlc_hrl,andalso_semi,t_tuple_size,binary_part,
-       bad_constants,bad_guards,guard_in_catch,beam_bool_SUITE]}].
+       bad_constants,bad_guards,guard_in_catch,beam_bool_SUITE,
+       cover_beam_dead]}].
 
 init_per_suite(Config) ->
     Config.
@@ -1619,7 +1621,9 @@ type_tests() ->
      is_reference,
      is_port,
      is_binary,
-     is_function].
+     is_bitstring,
+     is_function,
+     is_map].
 
 basic_andalso_orelse(Config) when is_list(Config) ->
     T = id({type,integers,23,42}),
@@ -2202,7 +2206,31 @@ maps() ->
 evidence(#{0 := Charge}) when 0; #{[] => Charge} == #{[] => 42} ->
     ok.
 
+cover_beam_dead(_Config) ->
+    Mod = ?FUNCTION_NAME,
+    Attr = [],
+    Fs = [{function,test,1,2,
+           [{label,1},
+            {line,[]},
+            {func_info,{atom,Mod},{atom,test},1},
+            {label,2},
+            %% Cover beam_dead:turn_op/1 using swapped operand order.
+            {test,is_ne_exact,{f,3},[{integer,1},{x,0}]},
+            {test,is_eq_exact,{f,1},[{atom,a},{x,0}]},
+            {label,3},
+            {move,{atom,ok},{x,0}},
+            return]}],
+    Exp = [{test,1}],
+    Asm = {Mod,Exp,Attr,Fs,3},
+    {ok,Mod,Beam} = compile:forms(Asm, [from_asm,binary,report]),
+    {module,Mod} = code:load_binary(Mod, Mod, Beam),
+    ok = Mod:test(1),
+    ok = Mod:test(a),
+    {'EXIT',_} = (catch Mod:test(other)),
+    true = code:delete(Mod),
+    _ = code:purge(Mod),
 
+    ok.
 
 %% Call this function to turn off constant propagation.
 id(I) -> I.
diff --git a/lib/compiler/test/lc_SUITE.erl b/lib/compiler/test/lc_SUITE.erl
index 9ad417b09b..699081470d 100644
--- a/lib/compiler/test/lc_SUITE.erl
+++ b/lib/compiler/test/lc_SUITE.erl
@@ -107,6 +107,31 @@ basic(Config) when is_list(Config) ->
     [] = [X || X <- L1, X+1 < 2],
     {'EXIT',_} = (catch [X || X <- L1, odd(X)]),
     fc([x], catch [E || E <- id(x)]),
+
+    %% Make sure that line numbers point out the generator.
+    case ?MODULE of
+        lc_inline_SUITE ->
+            ok;
+        _ ->
+            {'EXIT',{function_clause,
+                     [{?MODULE,_,_,
+                       [{file,"bad_lc.erl"},{line,4}]}|_]}} =
+                (catch bad_generator(a)),
+            {'EXIT',{function_clause,
+                     [{?MODULE,_,_,
+                       [{file,"bad_lc.erl"},{line,4}]}|_]}} =
+                (catch bad_generator([a|b])),
+            {'EXIT',{badarg,
+                     [{erlang,length,_,_},
+                      {?MODULE,bad_generator_bc,1,
+                       [{file,"bad_lc.erl"},{line,7}]}|_]}} =
+                (catch bad_generator_bc(a)),
+            {'EXIT',{badarg,
+                     [{erlang,length,_,_},
+                      {?MODULE,bad_generator_bc,1,
+                       [{file,"bad_lc.erl"},{line,7}]}|_]}} =
+                (catch bad_generator_bc([a|b]))
+    end,
     ok.
 
 tuple_list() ->
@@ -249,3 +274,11 @@ fc(Args, {'EXIT',{function_clause,[{?MODULE,_,Arity,_}|_]}})
 fc(Args, {'EXIT',{{case_clause,ActualArgs},_}})
   when ?MODULE =:= lc_inline_SUITE ->
     Args = tuple_to_list(ActualArgs).
+
+-file("bad_lc.erl", 1).
+bad_generator(List) ->                          %Line 2
+    [I ||                                       %Line 3
+        I <- List].                             %Line 4
+bad_generator_bc(List) ->                       %Line 5
+    << <<I:4>> ||                               %Line 6
+        I <- List>>.                            %Line 7
diff --git a/lib/compiler/test/map_SUITE.erl b/lib/compiler/test/map_SUITE.erl
index 5e90b79aa2..f15917e3cb 100644
--- a/lib/compiler/test/map_SUITE.erl
+++ b/lib/compiler/test/map_SUITE.erl
@@ -695,8 +695,28 @@ t_is_map(Config) when is_list(Config) ->
     if is_map(#{b=>1}) -> ok end,
     if not is_map([1,2,3]) -> ok end,
     if not is_map(x) -> ok end,
+
+    ok = do_t_is_map(map, #{}),
+    error = do_t_is_map(map, {a,b,c}),
+    ok = do_t_is_map(number, 42),
+    ok = do_t_is_map(number, 42.0),
+    error = do_t_is_map(number, {a,b,c}),
     ok.
 
+do_t_is_map(What, X) ->
+    B = case What of
+            map ->
+                %% Cover conversion of is_map/1 BIF to test instruction
+                %% in beam_utils:bif_to_test/3.
+                is_map(X);
+            number ->
+                is_number(X)
+        end,
+    case B of
+        true -> ok;
+        false -> error
+    end.
+
 % test map updates without matching
 t_update_literals(Config) when is_list(Config) ->
     Map = #{x=>1,y=>2,z=>3,q=>4},
diff --git a/lib/compiler/test/match_SUITE.erl b/lib/compiler/test/match_SUITE.erl
index c31695be24..4b26a8dcdc 100644
--- a/lib/compiler/test/match_SUITE.erl
+++ b/lib/compiler/test/match_SUITE.erl
@@ -24,7 +24,8 @@
 	 pmatch/1,mixed/1,aliases/1,non_matching_aliases/1,
 	 match_in_call/1,untuplify/1,shortcut_boolean/1,letify_guard/1,
 	 selectify/1,deselectify/1,underscore/1,match_map/1,map_vars_used/1,
-	 coverage/1,grab_bag/1,literal_binary/1]).
+	 coverage/1,grab_bag/1,literal_binary/1,
+         unary_op/1]).
 	 
 -include_lib("common_test/include/ct.hrl").
 
@@ -40,7 +41,7 @@ groups() ->
        match_in_call,untuplify,
        shortcut_boolean,letify_guard,selectify,deselectify,
        underscore,match_map,map_vars_used,coverage,
-       grab_bag,literal_binary]}].
+       grab_bag,literal_binary,unary_op]}].
 
 
 init_per_suite(Config) ->
@@ -617,6 +618,10 @@ grab_bag(_Config) ->
 	 {bad,16#555555555555555555555555555555555555555555555555555}],
     ok = grab_bag_remove_failure(L, unit, 0),
 
+    {42,<<43,44>>} = grab_bag_single_valued(<<42,43,44>>),
+    empty_list = grab_bag_single_valued([]),
+    empty_tuple = grab_bag_single_valued({}),
+
     ok.
 
 grab_bag_remove_failure([], _Unit, _MaxFailure) ->
@@ -634,6 +639,12 @@ grab_bag_remove_failure([{stretch,_,Mi}=Stretch | Specs], Unit, _MaxFailure) ->
 	    ok
     end.
 
+%% Cover a line v3_kernel that places binary matching first.
+grab_bag_single_valued(<<H,T/bytes>>) -> {H,T};
+grab_bag_single_valued([]) -> empty_list;
+grab_bag_single_valued({}) -> empty_tuple.
+
+
 %% Regression in 19.0, reported by Alexei Sholik
 literal_binary(_Config) ->
     3 = literal_binary_match(bar, <<"y">>),
@@ -652,5 +663,74 @@ literal_binary_match(_, <<"x">>) -> 2;
 literal_binary_match(_, <<"y">>) -> 3;
 literal_binary_match(_, _) -> fail.
 
+unary_op(Config) ->
+    %% ERL-514. This test case only verifies that the code
+    %% calculates the correct result, not that the generated
+    %% code is optimial.
+
+    {non_associative,30} = unary_op_1('&'),
+    {non_associative,300} = unary_op_1('^'),
+    {non_associative,300} = unary_op_1('not'),
+    {non_associative,300} = unary_op_1('+'),
+    {non_associative,300} = unary_op_1('-'),
+    {non_associative,300} = unary_op_1('~~~'),
+    {non_associative,300} = unary_op_1('!'),
+    {non_associative,320} = unary_op_1('@'),
+
+    error = unary_op_1(Config),
+    error = unary_op_1(abc),
+    error = unary_op_1(42),
+
+    ok.
+
+unary_op_1(Vop@1) ->
+    %% If all optimizations are working as they should, there should
+    %% be no stack frame and all '=:=' tests should be coalesced into
+    %% a single select_val instruction.
+
+    case Vop@1 =:= '&' of
+        true ->
+            {non_associative,30};
+        false ->
+            case
+                case Vop@1 =:= '^' of
+                    true ->
+                        true;
+                    false ->
+                        case Vop@1 =:= 'not' of
+                            true ->
+                                true;
+                            false ->
+                                case Vop@1 =:= '+' of
+                                    true ->
+                                        true;
+                                    false ->
+                                        case Vop@1 =:= '-' of
+                                            true ->
+                                                true;
+                                            false ->
+                                                case Vop@1 =:= '~~~' of
+                                                    true ->
+                                                        true;
+                                                    false ->
+                                                        Vop@1 =:= '!'
+                                                end
+                                        end
+                                end
+                        end
+                end
+            of
+                true ->
+                    {non_associative,300};
+                false ->
+                    case Vop@1 =:= '@' of
+                        true ->
+                            {non_associative,320};
+                        false ->
+                            error
+                    end
+            end
+    end.
+
 
 id(I) -> I.
diff --git a/lib/compiler/test/misc_SUITE.erl b/lib/compiler/test/misc_SUITE.erl
index ea4aaf40a9..4e39f4663e 100644
--- a/lib/compiler/test/misc_SUITE.erl
+++ b/lib/compiler/test/misc_SUITE.erl
@@ -171,7 +171,7 @@ silly_coverage(Config) when is_list(Config) ->
     expect_error(fun() -> sys_core_dsetel:module(BadCoreErlang, []) end),
     expect_error(fun() -> v3_kernel:module(BadCoreErlang, []) end),
 
-    %% v3_life
+    %% v3_codegen
     BadKernel = {k_mdef,[],?MODULE,
 		 [{foo,0}],
 		 [],
@@ -179,11 +179,7 @@ silly_coverage(Config) when is_list(Config) ->
 		   {k,[],[],[]},
 		   f,0,[],
 		   seriously_bad_body}]},
-    expect_error(fun() -> v3_life:module(BadKernel, []) end),
-
-    %% v3_codegen
-    CodegenInput = {?MODULE,[{foo,0}],[],[{function,foo,0,[a|b],a,b,[]}]},
-    expect_error(fun() -> v3_codegen:module(CodegenInput, []) end),
+    expect_error(fun() -> v3_codegen:module(BadKernel, []) end),
 
     %% beam_a
     BeamAInput = {?MODULE,[{foo,0}],[],
@@ -322,8 +318,7 @@ expect_error(Fun) ->
 	    io:format("~p", [Any]),
 	    ct:fail(call_was_supposed_to_fail)
     catch
-	Class:Reason ->
-	    Stk = erlang:get_stacktrace(),
+	Class:Reason:Stk ->
 	    io:format("~p:~p\n~p\n", [Class,Reason,Stk]),
 	    case {Class,Reason} of
 		{error,undef} ->
@@ -364,9 +359,7 @@ integer_encoding_1(Config) ->
     io:put_chars(Src, "t(Last) ->[\n"),
     io:put_chars(Data, "[\n"),
 
-    do_integer_encoding(-(id(1) bsl 10000), Src, Data),
-    do_integer_encoding(id(1) bsl 10000, Src, Data),
-    do_integer_encoding(1024, 0, Src, Data),
+    do_integer_encoding(137, 0, Src, Data),
     _ = [begin
 	     B = 1 bsl I,
 	     do_integer_encoding(-B-1, Src, Data),
@@ -375,7 +368,7 @@ integer_encoding_1(Config) ->
 	     do_integer_encoding(B-1, Src, Data),
 	     do_integer_encoding(B, Src, Data),
 	     do_integer_encoding(B+1, Src, Data)
-	 end || I <- lists:seq(1, 128)],
+	 end || I <- lists:seq(1, 130)],
     io:put_chars(Src, "Last].\n\n"),
     ok = file:close(Src),
     io:put_chars(Data, "0].\n\n"),
@@ -389,8 +382,6 @@ integer_encoding_1(Config) ->
     %% Compare lists.
     List = Mod:t(0),
     {ok,[List]} = file:consult(DataFile),
-    OneBsl10000 = id(1) bsl 10000,
-    [-(1 bsl 10000),OneBsl10000|_] = List,
 
     %% Cleanup.
     file:delete(SrcFile),
@@ -409,7 +400,3 @@ do_integer_encoding(I, Src, Data) ->
     Str = integer_to_list(I),
     io:put_chars(Src, [Str,",\n"]),
     io:put_chars(Data, [Str,",\n"]).
-
-    
-id(I) -> I.
-    
diff --git a/lib/compiler/test/receive_SUITE.erl b/lib/compiler/test/receive_SUITE.erl
index 8304672558..5e386790c0 100644
--- a/lib/compiler/test/receive_SUITE.erl
+++ b/lib/compiler/test/receive_SUITE.erl
@@ -222,9 +222,8 @@ do_ref_opt(Source, PrivDir) ->
 		    collect_recv_opt_instrs(Code)
 	end,
 	ok
-    catch Class:Error ->
-	    io:format("~s: ~p ~p\n~p\n",
-		      [Source,Class,Error,erlang:get_stacktrace()]),
+    catch Class:Error:Stk ->
+	    io:format("~s: ~p ~p\n~p\n", [Source,Class,Error,Stk]),
 	    error
     end.
 
@@ -265,6 +264,10 @@ export(Config) when is_list(Config) ->
     self() ! {result,Ref,42},
     42 = export_1(Ref),
     {error,timeout} = export_1(Ref),
+
+    self() ! {result,Ref},
+    {ok,Ref} = export_2(),
+
     ok.
 
 export_1(Reference) ->
@@ -281,6 +284,10 @@ export_1(Reference) ->
     id({build,self()}),
     Result.
 
+export_2() ->
+    receive {result,Result} -> ok end,
+    {ok,Result}.
+
 wait(Config) when is_list(Config) ->
     self() ! <<42>>,
     <<42>> = wait_1(r, 1, 2),
diff --git a/lib/compiler/test/trycatch_SUITE.erl b/lib/compiler/test/trycatch_SUITE.erl
index 42dbf7d5f0..d5a1dc642f 100644
--- a/lib/compiler/test/trycatch_SUITE.erl
+++ b/lib/compiler/test/trycatch_SUITE.erl
@@ -26,7 +26,8 @@
 	 nested_of/1,nested_catch/1,nested_after/1,
 	 nested_horrid/1,last_call_optimization/1,bool/1,
 	 plain_catch_coverage/1,andalso_orelse/1,get_in_try/1,
-	 hockey/1,handle_info/1,catch_in_catch/1,grab_bag/1]).
+	 hockey/1,handle_info/1,catch_in_catch/1,grab_bag/1,
+         stacktrace/1,nested_stacktrace/1,raise/1]).
 
 -include_lib("common_test/include/ct.hrl").
 
@@ -42,7 +43,8 @@ groups() ->
        after_oops,eclectic,rethrow,nested_of,nested_catch,
        nested_after,nested_horrid,last_call_optimization,
        bool,plain_catch_coverage,andalso_orelse,get_in_try,
-       hockey,handle_info,catch_in_catch,grab_bag]}].
+       hockey,handle_info,catch_in_catch,grab_bag,
+       stacktrace,nested_stacktrace,raise]}].
 
 
 init_per_suite(Config) ->
@@ -115,6 +117,16 @@ basic(Conf) when is_list(Conf) ->
 	 catch nisse -> erro
 	 end,
 
+    %% Unmatchable clauses.
+    try
+        throw(thrown)
+    catch
+        {a,b}={a,b,c} ->                        %Intentionally no match.
+            ok;
+        thrown ->
+            ok
+    end,
+
     ok.
 
 after_call() ->
@@ -1039,5 +1051,217 @@ grab_bag(_Config) ->
 
     ok.
 
+stacktrace(_Config) ->
+    V = [make_ref()|self()],
+    case ?MODULE:module_info(native) of
+        false ->
+            {value2,{caught1,badarg,[{erlang,abs,[V],_}|_]}} =
+                stacktrace_1({'abs',V}, error, {value,V}),
+            {caught2,{error,badarith},[{erlang,'+',[0,a],_},
+                                       {?MODULE,my_add,2,_}|_]} =
+                stacktrace_1({'div',{1,0}}, error, {'add',{0,a}});
+        true ->
+            {value2,{caught1,badarg,[{?MODULE,my_abs,1,_}|_]}} =
+                stacktrace_1({'abs',V}, error, {value,V}),
+            {caught2,{error,badarith},[{?MODULE,my_add,2,_}|_]} =
+                stacktrace_1({'div',{1,0}}, error, {'add',{0,a}})
+    end,
+    {caught2,{error,{try_clause,V}},[{?MODULE,stacktrace_1,3,_}|_]} =
+        stacktrace_1({value,V}, error, {value,V}),
+    {caught2,{throw,V},[{?MODULE,foo,1,_}|_]} =
+        stacktrace_1({value,V}, error, {throw,V}),
+
+    try
+        stacktrace_2()
+    catch
+        error:{badmatch,_}:Stk2 ->
+            [{?MODULE,stacktrace_2,0,_},
+             {?MODULE,stacktrace,1,_}|_] = Stk2,
+            Stk2 = erlang:get_stacktrace(),
+            ok
+    end,
+
+    try
+        stacktrace_3(a, b)
+    catch
+        error:function_clause:Stk3 ->
+            Stk3 = erlang:get_stacktrace(),
+            case lists:module_info(native) of
+                false ->
+                    [{lists,prefix,[a,b],_}|_] = Stk3;
+                true ->
+                    [{lists,prefix,2,_}|_] = Stk3
+            end
+    end,
+
+    try
+        throw(x)
+    catch
+        throw:x:IntentionallyUnused ->
+            ok
+    end.
+
+stacktrace_1(X, C1, Y) ->
+    try try foo(X) of
+            C1 -> value1
+        catch
+            C1:D1:Stk1 ->
+                Stk1 = erlang:get_stacktrace(),
+                {caught1,D1,Stk1}
+        after
+            foo(Y)
+        end of
+        V2 -> {value2,V2}
+    catch
+        C2:D2:Stk2 -> {caught2,{C2,D2},Stk2=erlang:get_stacktrace()}
+    end.
+
+stacktrace_2() ->
+    ok = erlang:process_info(self(), current_function),
+    ok.
+
+stacktrace_3(A, B) ->
+    {ok,lists:prefix(A, B)}.
+
+nested_stacktrace(_Config) ->
+    V = [{make_ref()}|[self()]],
+    value1 = nested_stacktrace_1({{value,{V,x1}},void,{V,x1}},
+                                 {void,void,void}),
+    case ?MODULE:module_info(native) of
+        false ->
+            {caught1,
+             [{erlang,'+',[V,x1],_},{?MODULE,my_add,2,_}|_],
+             value2} =
+                nested_stacktrace_1({{'add',{V,x1}},error,badarith},
+                                    {{value,{V,x2}},void,{V,x2}}),
+            {caught1,
+             [{erlang,'+',[V,x1],_},{?MODULE,my_add,2,_}|_],
+             {caught2,[{erlang,abs,[V],_}|_]}} =
+                nested_stacktrace_1({{'add',{V,x1}},error,badarith},
+                                    {{'abs',V},error,badarg});
+        true ->
+            {caught1,
+             [{?MODULE,my_add,2,_}|_],
+             value2} =
+                nested_stacktrace_1({{'add',{V,x1}},error,badarith},
+                                    {{value,{V,x2}},void,{V,x2}}),
+            {caught1,
+             [{?MODULE,my_add,2,_}|_],
+             {caught2,[{?MODULE,my_abs,1,_}|_]}} =
+                nested_stacktrace_1({{'add',{V,x1}},error,badarith},
+                                    {{'abs',V},error,badarg})
+    end,
+    ok.
+
+nested_stacktrace_1({X1,C1,V1}, {X2,C2,V2}) ->
+    try foo(X1) of
+        V1 -> value1
+    catch
+        C1:V1:S1 ->
+            S1 = erlang:get_stacktrace(),
+            T2 = try foo(X2) of
+                     V2 -> value2
+                 catch
+                     C2:V2:S2 ->
+                         S2 = erlang:get_stacktrace(),
+                         {caught2,S2}
+                 end,
+            {caught1,S1,T2}
+    end.
+
+raise(_Config) ->
+    test_raise(fun() -> exit({exit,tuple}) end),
+    test_raise(fun() -> abs(id(x)) end),
+    test_raise(fun() -> throw({was,thrown}) end),
+
+    badarg = bad_raise(fun() -> abs(id(x)) end),
+
+    ok.
+
+bad_raise(Expr) ->
+    try
+        Expr()
+    catch
+        _:E:Stk ->
+            erlang:raise(bad_class, E, Stk)
+    end.
+
+test_raise(Expr) ->
+    test_raise_1(Expr),
+    test_raise_2(Expr),
+    test_raise_3(Expr).
+
+test_raise_1(Expr) ->
+    erase(exception),
+    try
+        do_test_raise_1(Expr)
+    catch
+        C:E:Stk ->
+            {C,E,Stk} = erase(exception)
+    end.
+
+do_test_raise_1(Expr) ->
+    try
+        Expr()
+    catch
+        C:E:Stk ->
+            %% Here the stacktrace must be built.
+            put(exception, {C,E,Stk}),
+            erlang:raise(C, E, Stk)
+    end.
+
+test_raise_2(Expr) ->
+    erase(exception),
+    try
+        do_test_raise_2(Expr)
+    catch
+        C:E:Stk ->
+            {C,E} = erase(exception),
+            try
+                Expr()
+            catch
+                _:_:S ->
+                    [StkTop|_] = S,
+                    [StkTop|_] = Stk
+            end
+    end.
+
+do_test_raise_2(Expr) ->
+    try
+        Expr()
+    catch
+        C:E:Stk ->
+            %% Here it is possible to replace erlang:raise/3 with
+            %% the raw_raise/3 instruction since the stacktrace is
+            %% not actually used.
+            put(exception, {C,E}),
+            erlang:raise(C, E, Stk)
+    end.
+
+test_raise_3(Expr) ->
+    try
+        do_test_raise_3(Expr)
+    catch
+        exit:{exception,C,E}:Stk ->
+            try
+                Expr()
+            catch
+                C:E:S ->
+                    [StkTop|_] = S,
+                    [StkTop|_] = Stk
+            end
+    end.
+
+do_test_raise_3(Expr) ->
+    try
+        Expr()
+    catch
+        C:E:Stk ->
+            %% Here it is possible to replace erlang:raise/3 with
+            %% the raw_raise/3 instruction since the stacktrace is
+            %% not actually used.
+            erlang:raise(exit, {exception,C,E}, Stk)
+    end.
+
 
 id(I) -> I.
diff --git a/lib/compiler/test/z_SUITE.erl b/lib/compiler/test/z_SUITE.erl
index d864184f4c..cd95d0e733 100644
--- a/lib/compiler/test/z_SUITE.erl
+++ b/lib/compiler/test/z_SUITE.erl
@@ -54,8 +54,7 @@ do_loaded([{M,_}|Ms], E0) ->
 	    _ = M:module_info(functions),
 	    E0
 	catch
-	    C:Error ->
-		Stk = erlang:get_stacktrace(),
+	    C:Error:Stk ->
 		io:format("~p:~p\n~p\n", [C,Error,Stk]),
 		E0 + 1
 	end,
diff --git a/lib/compiler/vsn.mk b/lib/compiler/vsn.mk
index 435a57aac2..ee75ee27fd 100644
--- a/lib/compiler/vsn.mk
+++ b/lib/compiler/vsn.mk
@@ -1 +1 @@
-COMPILER_VSN = 7.1.3
+COMPILER_VSN = 7.1.5
diff --git a/lib/cosEvent/doc/src/notes.xml b/lib/cosEvent/doc/src/notes.xml
index fe94cb64d3..ba0b0d88db 100644
--- a/lib/cosEvent/doc/src/notes.xml
+++ b/lib/cosEvent/doc/src/notes.xml
@@ -33,7 +33,22 @@
     <file>notes.xml</file>
   </header>
 
-  <section><title>cosEvent 2.2.1</title>
+  <section><title>cosEvent 2.2.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>cosEvent 2.2.1</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/cosEvent/vsn.mk b/lib/cosEvent/vsn.mk
index c39bed9fe4..578950294a 100644
--- a/lib/cosEvent/vsn.mk
+++ b/lib/cosEvent/vsn.mk
@@ -1,2 +1,2 @@
-COSEVENT_VSN = 2.2.1
+COSEVENT_VSN = 2.2.2
 
diff --git a/lib/cosEventDomain/doc/src/notes.xml b/lib/cosEventDomain/doc/src/notes.xml
index 5e5bb2c33e..bd0a119ad2 100644
--- a/lib/cosEventDomain/doc/src/notes.xml
+++ b/lib/cosEventDomain/doc/src/notes.xml
@@ -32,7 +32,22 @@
     <file>notes.xml</file>
   </header>
 
-  <section><title>cosEventDomain 1.2.1</title>
+  <section><title>cosEventDomain 1.2.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>cosEventDomain 1.2.1</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/cosEventDomain/vsn.mk b/lib/cosEventDomain/vsn.mk
index 4e10d6ac60..0c063a00f9 100644
--- a/lib/cosEventDomain/vsn.mk
+++ b/lib/cosEventDomain/vsn.mk
@@ -1,2 +1,2 @@
-COSEVENTDOMAIN_VSN = 1.2.1
+COSEVENTDOMAIN_VSN = 1.2.2
 
diff --git a/lib/cosFileTransfer/doc/src/notes.xml b/lib/cosFileTransfer/doc/src/notes.xml
index 58ab087014..e0b4bdf64b 100644
--- a/lib/cosFileTransfer/doc/src/notes.xml
+++ b/lib/cosFileTransfer/doc/src/notes.xml
@@ -31,7 +31,22 @@
     <file>notes.xml</file>
   </header>
 
-  <section><title>cosFileTransfer 1.2.1</title>
+  <section><title>cosFileTransfer 1.2.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>cosFileTransfer 1.2.1</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/cosFileTransfer/vsn.mk b/lib/cosFileTransfer/vsn.mk
index e271c05242..561f11fbb2 100644
--- a/lib/cosFileTransfer/vsn.mk
+++ b/lib/cosFileTransfer/vsn.mk
@@ -1 +1 @@
-COSFILETRANSFER_VSN = 1.2.1
+COSFILETRANSFER_VSN = 1.2.2
diff --git a/lib/cosNotification/doc/src/notes.xml b/lib/cosNotification/doc/src/notes.xml
index 1237000153..bf0fc73548 100644
--- a/lib/cosNotification/doc/src/notes.xml
+++ b/lib/cosNotification/doc/src/notes.xml
@@ -32,7 +32,22 @@
     <file>notes.xml</file>
   </header>
 
-  <section><title>cosNotification 1.2.2</title>
+  <section><title>cosNotification 1.2.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>cosNotification 1.2.2</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/cosNotification/vsn.mk b/lib/cosNotification/vsn.mk
index 0d95ab4853..1677057670 100644
--- a/lib/cosNotification/vsn.mk
+++ b/lib/cosNotification/vsn.mk
@@ -1,2 +1,2 @@
-COSNOTIFICATION_VSN = 1.2.2
+COSNOTIFICATION_VSN = 1.2.3
 
diff --git a/lib/cosProperty/doc/src/notes.xml b/lib/cosProperty/doc/src/notes.xml
index e5d22982c5..4de246de67 100644
--- a/lib/cosProperty/doc/src/notes.xml
+++ b/lib/cosProperty/doc/src/notes.xml
@@ -33,7 +33,22 @@
   </header>
 
 
-  <section><title>cosProperty 1.2.2</title>
+  <section><title>cosProperty 1.2.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>cosProperty 1.2.2</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/cosProperty/vsn.mk b/lib/cosProperty/vsn.mk
index 78ba88445d..a3a952346e 100644
--- a/lib/cosProperty/vsn.mk
+++ b/lib/cosProperty/vsn.mk
@@ -1,2 +1,2 @@
-COSPROPERTY_VSN = 1.2.2
+COSPROPERTY_VSN = 1.2.3
 
diff --git a/lib/cosTime/doc/src/notes.xml b/lib/cosTime/doc/src/notes.xml
index 686d9e6add..16e02f8b1f 100644
--- a/lib/cosTime/doc/src/notes.xml
+++ b/lib/cosTime/doc/src/notes.xml
@@ -33,7 +33,22 @@
     <file>notes.xml</file>
   </header>
 
-  <section><title>cosTime 1.2.2</title>
+  <section><title>cosTime 1.2.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>cosTime 1.2.2</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/cosTime/vsn.mk b/lib/cosTime/vsn.mk
index 7c9cae2d2f..7d6fcbebcd 100644
--- a/lib/cosTime/vsn.mk
+++ b/lib/cosTime/vsn.mk
@@ -1,2 +1,2 @@
-COSTIME_VSN = 1.2.2
+COSTIME_VSN = 1.2.3
 
diff --git a/lib/cosTransactions/doc/src/notes.xml b/lib/cosTransactions/doc/src/notes.xml
index 85ace1208b..2401c04c3f 100644
--- a/lib/cosTransactions/doc/src/notes.xml
+++ b/lib/cosTransactions/doc/src/notes.xml
@@ -33,7 +33,22 @@
     <file>notes.xml</file>
   </header>
 
-  <section><title>cosTransactions 1.3.2</title>
+  <section><title>cosTransactions 1.3.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>cosTransactions 1.3.2</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/cosTransactions/vsn.mk b/lib/cosTransactions/vsn.mk
index ab163d83c2..bba2058231 100644
--- a/lib/cosTransactions/vsn.mk
+++ b/lib/cosTransactions/vsn.mk
@@ -1 +1 @@
-COSTRANSACTIONS_VSN = 1.3.2
+COSTRANSACTIONS_VSN = 1.3.3
diff --git a/lib/crypto/c_src/Makefile.in b/lib/crypto/c_src/Makefile.in
index af7c209c75..31124ba477 100644
--- a/lib/crypto/c_src/Makefile.in
+++ b/lib/crypto/c_src/Makefile.in
@@ -1,7 +1,7 @@
 #
 # %CopyrightBegin%
 #
-# Copyright Ericsson AB 1999-2016. All Rights Reserved.
+# Copyright Ericsson AB 1999-2017. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -78,12 +78,16 @@ CRYPTO_STATIC_OBJS = $(OBJDIR)/crypto_static$(TYPEMARKER).o\
 
 NIF_ARCHIVE = $(LIBDIR)/crypto$(TYPEMARKER).a
 
+TEST_ENGINE_OBJS = $(OBJDIR)/otp_test_engine$(TYPEMARKER).o
+
 ifeq ($(findstring win32,$(TARGET)), win32)
 NIF_LIB = $(LIBDIR)/crypto$(TYPEMARKER).dll
 CALLBACK_LIB = $(LIBDIR)/crypto_callback$(TYPEMARKER).dll
+TEST_ENGINE_LIB = $(LIBDIR)/otp_test_engine$(TYPEMARKER).dll
 else
 NIF_LIB = $(LIBDIR)/crypto$(TYPEMARKER).so
 CALLBACK_LIB = $(LIBDIR)/crypto_callback$(TYPEMARKER).so
+TEST_ENGINE_LIB = $(LIBDIR)/otp_test_engine$(TYPEMARKER).so
 endif
 
 ifeq ($(HOST_OS),)
@@ -129,10 +133,22 @@ ALL_STATIC_CFLAGS = $(DED_STATIC_CFLAGS) $(INCLUDES)
 
 _create_dirs := $(shell mkdir -p $(OBJDIR) $(LIBDIR))
 
-debug opt valgrind: $(NIF_LIB) $(CALLBACK_LIB)
+debug opt valgrind: $(NIF_LIB) $(CALLBACK_LIB) $(TEST_ENGINE_LIB) 
 
 static_lib: $(NIF_ARCHIVE)
 
+$(OBJDIR)/otp_test_engine$(TYPEMARKER).o: otp_test_engine.c
+	$(V_at)$(INSTALL_DIR) $(OBJDIR)
+	$(V_CC) -c -o $@ $(ALL_CFLAGS) $<
+
+$(LIBDIR)/otp_test_engine$(TYPEMARKER).so: $(TEST_ENGINE_OBJS)
+	$(V_at)$(INSTALL_DIR) $(LIBDIR)
+	$(V_LD) $(LDFLAGS) -o $@ $^ $(LDLIBS) $(CRYPTO_LINK_LIB)
+
+$(LIBDIR)/otp_test_engine$(TYPEMARKER).dll: $(TEST_ENGINE_OBJS)
+	$(V_at)$(INSTALL_DIR) $(LIBDIR)
+	$(V_LD) $(LDFLAGS) -o $@  $(SSL_DED_LD_RUNTIME_LIBRARY_PATH) -L$(SSL_LIBDIR) $(TEST_ENGINE_OBJS) -l$(SSL_CRYPTO_LIBNAME) -l$(SSL_SSL_LIBNAME)
+
 $(OBJDIR)/%$(TYPEMARKER).o: %.c
 	$(V_at)$(INSTALL_DIR) $(OBJDIR)
 	$(V_CC) -c -o $@ $(ALL_CFLAGS) $<
@@ -170,6 +186,7 @@ ifeq ($(findstring win32,$(TARGET)), win32)
 	rm -f $(LIBDIR)/crypto.debug.dll
 	rm -f $(LIBDIR)/crypto_callback.dll
 	rm -f $(LIBDIR)/crypto_callback.debug.dll
+	rm -f $(LIBDIR)/otp_test_engine.dll
 else
 	rm -f $(LIBDIR)/crypto.so
 	rm -f $(LIBDIR)/crypto.debug.so
@@ -177,6 +194,7 @@ else
 	rm -f $(LIBDIR)/crypto_callback.so
 	rm -f $(LIBDIR)/crypto_callback.debug.so
 	rm -f $(LIBDIR)/crypto_callback.valgrind.so
+	rm -f $(LIBDIR)/otp_test_engine.so
 endif
 	rm -f $(OBJDIR)/crypto.o
 	rm -f $(OBJDIR)/crypto_static.o
@@ -187,6 +205,7 @@ endif
 	rm -f $(OBJDIR)/crypto_callback.o
 	rm -f $(OBJDIR)/crypto_callback.debug.o
 	rm -f $(OBJDIR)/crypto_callback.valgrind.o
+	rm -f $(OBJDIR)/otp_test_engine.o
 	rm -f core *~
 
 docs:
@@ -206,6 +225,8 @@ ifeq ($(DYNAMIC_CRYPTO_LIB),yes)
 	$(INSTALL_PROGRAM) $(CALLBACK_OBJS) "$(RELSYSDIR)/priv/obj"
 	$(INSTALL_PROGRAM) $(CALLBACK_LIB) "$(RELSYSDIR)/priv/lib"
 endif
+	$(INSTALL_PROGRAM) $(TEST_ENGINE_OBJS) "$(RELSYSDIR)/priv/obj"
+	$(INSTALL_PROGRAM) $(TEST_ENGINE_LIB) "$(RELSYSDIR)/priv/lib"
 
 release_docs_spec:
 
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index 53fe233790..149387bcee 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * %CopyrightBegin%
  *
  * Copyright Ericsson AB 2010-2017. All Rights Reserved.
@@ -19,8 +19,8 @@
  */
 
 /*
- * Purpose:  Dynamically loadable NIF library for cryptography. 
- * Based on OpenSSL. 
+ * Purpose:  Dynamically loadable NIF library for cryptography.
+ * Based on OpenSSL.
  */
 
 #ifdef __WIN32__
@@ -60,6 +60,8 @@
 #include <openssl/rand.h>
 #include <openssl/evp.h>
 #include <openssl/hmac.h>
+#include <openssl/engine.h>
+#include <openssl/err.h>
 
 /* Helper macro to construct a OPENSSL_VERSION_NUMBER.
  * See openssl/opensslv.h
@@ -79,9 +81,9 @@
  *
  * Therefor works tests like this as intendend:
  *     OPENSSL_VERSION_NUMBER >= PACKED_OPENSSL_VERSION_PLAIN(1,0,0)
- * (The test is for example "2.4.2" >= "1.0.0" although the test 
+ * (The test is for example "2.4.2" >= "1.0.0" although the test
  *  with the cloned OpenSSL test would be "1.0.1" >= "1.0.0")
- *     
+ *
  * But tests like this gives wrong result:
  *     OPENSSL_VERSION_NUMBER < PACKED_OPENSSL_VERSION_PLAIN(1,1,0)
  * (The test is false since "2.4.2" < "1.1.0".  It should have been
@@ -119,6 +121,10 @@
 #include <openssl/modes.h>
 #endif
 
+#if OPENSSL_VERSION_NUMBER >= PACKED_OPENSSL_VERSION(0,9,8,'h')
+#define HAS_ENGINE_SUPPORT
+#endif
+
 #include "crypto_callback.h"
 
 #if OPENSSL_VERSION_NUMBER >= PACKED_OPENSSL_VERSION_PLAIN(0,9,8)	\
@@ -173,6 +179,12 @@
 # define HAVE_ECB_IVEC_BUG
 #endif
 
+#define HAVE_RSA_SSLV23_PADDING
+#if defined(HAS_LIBRESSL)                                             \
+    && LIBRESSL_VERSION_NUMBER >= PACKED_OPENSSL_VERSION_PLAIN(2,6,1)
+# undef HAVE_RSA_SSLV23_PADDING
+#endif
+
 #if defined(HAVE_CMAC)
 #include <openssl/cmac.h>
 #endif
@@ -240,7 +252,7 @@
 
 /* This shall correspond to the similar macro in crypto.erl */
 /* Current value is: erlang:system_info(context_reductions) * 10 */
-#define MAX_BYTES_TO_NIF 20000 
+#define MAX_BYTES_TO_NIF 20000
 
 #define CONSUME_REDS(NifEnv, Ibin)			\
 do {							\
@@ -277,7 +289,7 @@ static HMAC_CTX *HMAC_CTX_new()
 static void HMAC_CTX_free(HMAC_CTX *ctx)
 {
     HMAC_CTX_cleanup(ctx);
-    return CRYPTO_free(ctx);
+    CRYPTO_free(ctx);
 }
 
 #define EVP_MD_CTX_new() EVP_MD_CTX_create()
@@ -342,6 +354,10 @@ static INLINE void RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const
 
 static INLINE int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key);
 static INLINE int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g);
+static INLINE void DSA_get0_pqg(const DSA *dsa,
+			       const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
+static INLINE void DSA_get0_key(const DSA *dsa,
+			       const BIGNUM **pub_key, const BIGNUM **priv_key);
 
 static INLINE int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key)
 {
@@ -358,6 +374,23 @@ static INLINE int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g)
     return 1;
 }
 
+static INLINE void
+DSA_get0_pqg(const DSA *dsa, const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
+{
+    *p = dsa->p;
+    *q = dsa->q;
+    *g = dsa->g;
+}
+
+static INLINE void
+DSA_get0_key(const DSA *dsa, const BIGNUM **pub_key, const BIGNUM **priv_key)
+{
+    if (pub_key) *pub_key = dsa->pub_key;
+    if (priv_key) *priv_key = dsa->priv_key;
+}
+
+
+
 static INLINE int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key);
 static INLINE int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g);
 static INLINE int DH_set_length(DH *dh, long length);
@@ -387,6 +420,8 @@ static INLINE int DH_set_length(DH *dh, long length)
     return 1;
 }
 
+
+
 static INLINE void
 DH_get0_pqg(const DH *dh, const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
 {
@@ -398,8 +433,8 @@ DH_get0_pqg(const DH *dh, const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
 static INLINE void
 DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key)
 {
-    *pub_key = dh->pub_key;
-    *priv_key = dh->priv_key;
+    if (pub_key) *pub_key = dh->pub_key;
+    if (priv_key) *priv_key = dh->priv_key;
 }
 
 #else /* End of compatibility definitions. */
@@ -444,10 +479,9 @@ static ERL_NIF_TERM pkey_sign_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM a
 static ERL_NIF_TERM pkey_verify_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM rsa_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
-static ERL_NIF_TERM dh_generate_parameters_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
-static ERL_NIF_TERM dh_check(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM dh_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM dh_compute_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM privkey_to_pubkey_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM srp_value_B_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM srp_user_secret_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM srp_host_secret_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
@@ -466,6 +500,22 @@ static ERL_NIF_TERM aes_gcm_decrypt_NO_EVP(ErlNifEnv* env, int argc, const ERL_N
 static ERL_NIF_TERM chacha20_poly1305_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM chacha20_poly1305_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 
+static int get_engine_load_cmd_list(ErlNifEnv* env, const ERL_NIF_TERM term, char **cmds, int i);
+static ERL_NIF_TERM engine_by_id_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_init_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_finish_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_free_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_load_dynamic_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_ctrl_cmd_strings_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_register_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_unregister_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_add_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_remove_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_get_first_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_get_next_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_get_id_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM engine_get_all_methods_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+
 /* helpers */
 static void init_algorithms_types(ErlNifEnv*);
 static void init_digest_types(ErlNifEnv* env);
@@ -477,6 +527,10 @@ static int term2point(ErlNifEnv* env, ERL_NIF_TERM term,
 #endif
 static ERL_NIF_TERM bin_from_bn(ErlNifEnv* env, const BIGNUM *bn);
 
+#ifdef HAS_ENGINE_SUPPORT
+static int zero_terminate(ErlNifBinary bin, char **buf);
+#endif
+
 static int library_refc = 0; /* number of users of this dynamic library */
 
 static ErlNifFunc nif_funcs[] = {
@@ -512,10 +566,9 @@ static ErlNifFunc nif_funcs[] = {
     {"pkey_verify_nif", 6, pkey_verify_nif},
     {"pkey_crypt_nif", 6, pkey_crypt_nif},
     {"rsa_generate_key_nif", 2, rsa_generate_key_nif},
-    {"dh_generate_parameters_nif", 2, dh_generate_parameters_nif},
-    {"dh_check", 1, dh_check},
     {"dh_generate_key_nif", 4, dh_generate_key_nif},
     {"dh_compute_key_nif", 3, dh_compute_key_nif},
+    {"privkey_to_pubkey_nif", 2, privkey_to_pubkey_nif},
     {"srp_value_B_nif", 5, srp_value_B_nif},
     {"srp_user_secret_nif", 7, srp_user_secret_nif},
     {"srp_host_secret_nif", 5, srp_host_secret_nif},
@@ -529,12 +582,27 @@ static ErlNifFunc nif_funcs[] = {
     {"aes_gcm_decrypt", 5, aes_gcm_decrypt},
 
     {"chacha20_poly1305_encrypt", 4, chacha20_poly1305_encrypt},
-    {"chacha20_poly1305_decrypt", 5, chacha20_poly1305_decrypt}
+    {"chacha20_poly1305_decrypt", 5, chacha20_poly1305_decrypt},
+
+    {"engine_by_id_nif", 1, engine_by_id_nif},
+    {"engine_init_nif", 1, engine_init_nif},
+    {"engine_finish_nif", 1, engine_finish_nif},
+    {"engine_free_nif", 1, engine_free_nif},
+    {"engine_load_dynamic_nif", 0, engine_load_dynamic_nif},
+    {"engine_ctrl_cmd_strings_nif", 3, engine_ctrl_cmd_strings_nif},
+    {"engine_register_nif", 2, engine_register_nif},
+    {"engine_unregister_nif", 2, engine_unregister_nif},
+    {"engine_add_nif", 1, engine_add_nif},
+    {"engine_remove_nif", 1, engine_remove_nif},
+    {"engine_get_first_nif", 0, engine_get_first_nif},
+    {"engine_get_next_nif", 1, engine_get_next_nif},
+    {"engine_get_id_nif", 1, engine_get_id_nif},
+    {"engine_get_all_methods_nif", 0, engine_get_all_methods_nif}
+
 };
 
 ERL_NIF_INIT(crypto,nif_funcs,load,NULL,upgrade,unload)
 
-
 #define MD5_CTX_LEN       (sizeof(MD5_CTX))
 #define MD4_CTX_LEN       (sizeof(MD4_CTX))
 #define RIPEMD160_CTX_LEN (sizeof(RIPEMD160_CTX))
@@ -593,7 +661,9 @@ static ERL_NIF_TERM atom_rsa_oaep_md;
 static ERL_NIF_TERM atom_rsa_pad; /* backwards compatibility */
 static ERL_NIF_TERM atom_rsa_padding;
 static ERL_NIF_TERM atom_rsa_pkcs1_pss_padding;
+#ifdef HAVE_RSA_SSLV23_PADDING
 static ERL_NIF_TERM atom_rsa_sslv23_padding;
+#endif
 static ERL_NIF_TERM atom_rsa_x931_padding;
 static ERL_NIF_TERM atom_rsa_pss_saltlen;
 static ERL_NIF_TERM atom_sha224;
@@ -603,7 +673,33 @@ static ERL_NIF_TERM atom_sha512;
 static ERL_NIF_TERM atom_md5;
 static ERL_NIF_TERM atom_ripemd160;
 
-
+#ifdef HAS_ENGINE_SUPPORT
+static ERL_NIF_TERM atom_bad_engine_method;
+static ERL_NIF_TERM atom_bad_engine_id;
+static ERL_NIF_TERM atom_ctrl_cmd_failed;
+static ERL_NIF_TERM atom_engine_init_failed;
+static ERL_NIF_TERM atom_register_engine_failed;
+static ERL_NIF_TERM atom_add_engine_failed;
+static ERL_NIF_TERM atom_remove_engine_failed;
+static ERL_NIF_TERM atom_engine_method_not_supported;
+
+static ERL_NIF_TERM atom_engine_method_rsa;
+static ERL_NIF_TERM atom_engine_method_dsa;
+static ERL_NIF_TERM atom_engine_method_dh;
+static ERL_NIF_TERM atom_engine_method_rand;
+static ERL_NIF_TERM atom_engine_method_ecdh;
+static ERL_NIF_TERM atom_engine_method_ecdsa;
+static ERL_NIF_TERM atom_engine_method_ciphers;
+static ERL_NIF_TERM atom_engine_method_digests;
+static ERL_NIF_TERM atom_engine_method_store;
+static ERL_NIF_TERM atom_engine_method_pkey_meths;
+static ERL_NIF_TERM atom_engine_method_pkey_asn1_meths;
+static ERL_NIF_TERM atom_engine_method_ec;
+
+static ERL_NIF_TERM atom_engine;
+static ERL_NIF_TERM atom_key_id;
+static ERL_NIF_TERM atom_password;
+#endif
 
 static ErlNifResourceType* hmac_context_rtype;
 struct hmac_context
@@ -728,11 +824,13 @@ static struct cipher_type_t cipher_types[] =
 
 static struct cipher_type_t* get_cipher_type(ERL_NIF_TERM type, size_t key_len);
 
+
 /*
 #define PRINTF_ERR0(FMT) enif_fprintf(stderr, FMT "\n")
 #define PRINTF_ERR1(FMT, A1) enif_fprintf(stderr, FMT "\n", A1)
 #define PRINTF_ERR2(FMT, A1, A2) enif_fprintf(stderr, FMT "\n", A1, A2)
 */
+
 #define PRINTF_ERR0(FMT)
 #define PRINTF_ERR1(FMT,A1)
 #define PRINTF_ERR2(FMT,A1,A2)
@@ -758,6 +856,23 @@ static void evp_cipher_ctx_dtor(ErlNifEnv* env, struct evp_cipher_ctx* ctx) {
 }
 #endif
 
+// Engine
+#ifdef HAS_ENGINE_SUPPORT
+static ErlNifResourceType* engine_ctx_rtype;
+struct engine_ctx {
+    ENGINE *engine;
+    char *id;
+};
+static void engine_ctx_dtor(ErlNifEnv* env, struct engine_ctx* ctx) {
+    PRINTF_ERR0("engine_ctx_dtor");
+    if(ctx->id) {
+        PRINTF_ERR1("  non empty ctx->id=%s", ctx->id);
+        enif_free(ctx->id);
+    } else
+         PRINTF_ERR0("  empty ctx->id=NULL");
+}
+#endif
+
 static int verify_lib_version(void)
 {
     const unsigned long libv = SSLeay();
@@ -793,7 +908,7 @@ static char crypto_callback_name[] = "crypto_callback";
 static int change_basename(ErlNifBinary* bin, char* buf, int bufsz, const char* newfile)
 {
     int i;
-    
+
     for (i = bin->size; i > 0; i--) {
 	if (bin->data[i-1] == '/')
 	    break;
@@ -869,12 +984,23 @@ static int initialize(ErlNifEnv* env, ERL_NIF_TERM load_info)
         return __LINE__;
     }
 #endif
+#ifdef HAS_ENGINE_SUPPORT
+    engine_ctx_rtype = enif_open_resource_type(env, NULL, "ENGINE_CTX",
+                                                   (ErlNifResourceDtor*) engine_ctx_dtor,
+                                                   ERL_NIF_RT_CREATE|ERL_NIF_RT_TAKEOVER,
+                                                   NULL);
+    if (!engine_ctx_rtype) {
+        PRINTF_ERR0("CRYPTO: Could not open resource type 'ENGINE_CTX'");
+        return __LINE__;
+    }
+
     if (library_refc > 0) {
 	/* Repeated loading of this library (module upgrade).
 	 * Atoms and callbacks are already set, we are done.
 	 */
 	return 0;
     }
+#endif 
 
     atom_true  = enif_make_atom(env,"true");
     atom_false = enif_make_atom(env,"false");
@@ -942,7 +1068,9 @@ static int initialize(ErlNifEnv* env, ERL_NIF_TERM load_info)
     atom_rsa_pad = enif_make_atom(env,"rsa_pad"); /* backwards compatibility */
     atom_rsa_padding = enif_make_atom(env,"rsa_padding");
     atom_rsa_pkcs1_pss_padding = enif_make_atom(env,"rsa_pkcs1_pss_padding");
+#ifdef HAVE_RSA_SSLV23_PADDING
     atom_rsa_sslv23_padding = enif_make_atom(env,"rsa_sslv23_padding");
+#endif
     atom_rsa_x931_padding = enif_make_atom(env,"rsa_x931_padding");
     atom_rsa_pss_saltlen = enif_make_atom(env,"rsa_pss_saltlen");
     atom_sha224 = enif_make_atom(env,"sha224");
@@ -952,6 +1080,33 @@ static int initialize(ErlNifEnv* env, ERL_NIF_TERM load_info)
     atom_md5 = enif_make_atom(env,"md5");
     atom_ripemd160 = enif_make_atom(env,"ripemd160");
 
+#ifdef HAS_ENGINE_SUPPORT
+    atom_bad_engine_method = enif_make_atom(env,"bad_engine_method");
+    atom_bad_engine_id = enif_make_atom(env,"bad_engine_id");
+    atom_ctrl_cmd_failed = enif_make_atom(env,"ctrl_cmd_failed");
+    atom_engine_init_failed = enif_make_atom(env,"engine_init_failed");
+    atom_engine_method_not_supported = enif_make_atom(env,"engine_method_not_supported");
+    atom_add_engine_failed = enif_make_atom(env,"add_engine_failed");
+    atom_remove_engine_failed = enif_make_atom(env,"remove_engine_failed");
+
+    atom_engine_method_rsa = enif_make_atom(env,"engine_method_rsa");
+    atom_engine_method_dsa = enif_make_atom(env,"engine_method_dsa");
+    atom_engine_method_dh = enif_make_atom(env,"engine_method_dh");
+    atom_engine_method_rand = enif_make_atom(env,"engine_method_rand");
+    atom_engine_method_ecdh = enif_make_atom(env,"engine_method_ecdh");
+    atom_engine_method_ecdsa = enif_make_atom(env,"engine_method_ecdsa");
+    atom_engine_method_store = enif_make_atom(env,"engine_method_store");
+    atom_engine_method_ciphers = enif_make_atom(env,"engine_method_ciphers");
+    atom_engine_method_digests = enif_make_atom(env,"engine_method_digests");
+    atom_engine_method_pkey_meths = enif_make_atom(env,"engine_method_pkey_meths");
+    atom_engine_method_pkey_asn1_meths = enif_make_atom(env,"engine_method_pkey_asn1_meths");
+    atom_engine_method_ec = enif_make_atom(env,"engine_method_ec");
+
+    atom_engine = enif_make_atom(env,"engine");
+    atom_key_id = enif_make_atom(env,"key_id");
+    atom_password = enif_make_atom(env,"password");
+#endif
+
     init_digest_types(env);
     init_cipher_types(env);
     init_algorithms_types(env);
@@ -973,24 +1128,24 @@ static int initialize(ErlNifEnv* env, ERL_NIF_TERM load_info)
 #else /* !HAVE_DYNAMIC_CRYPTO_LIB */
     funcp = &get_crypto_callbacks;
 #endif
-    
+
 #ifdef OPENSSL_THREADS
     enif_system_info(&sys_info, sizeof(sys_info));
     if (sys_info.scheduler_threads > 1) {
-	nlocks = CRYPTO_num_locks(); 
+	nlocks = CRYPTO_num_locks();
     }
     /* else no need for locks */
 #endif
-    
+
     ccb = (*funcp)(nlocks);
-    
+
     if (!ccb || ccb->sizeof_me != sizeof(*ccb)) {
 	PRINTF_ERR0("Invalid 'crypto_callbacks'");
 	return __LINE__;
     }
-    
+
     CRYPTO_set_mem_functions(ccb->crypto_alloc, ccb->crypto_realloc, ccb->crypto_free);
-    
+
 #ifdef OPENSSL_THREADS
     if (nlocks > 0) {
 	CRYPTO_set_locking_callback(ccb->locking_function);
@@ -1186,11 +1341,11 @@ static ERL_NIF_TERM info_lib(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]
      * Version string is still from library though.
      */
 
-    memcpy(enif_make_new_binary(env, name_sz, &name_term), libname, name_sz);    
+    memcpy(enif_make_new_binary(env, name_sz, &name_term), libname, name_sz);
     memcpy(enif_make_new_binary(env, ver_sz, &ver_term), ver, ver_sz);
 
     return enif_make_list1(env, enif_make_tuple3(env, name_term,
-						 enif_make_int(env, ver_num),						 
+						 enif_make_int(env, ver_num),
 						 ver_term));
 }
 
@@ -1225,6 +1380,8 @@ static ERL_NIF_TERM enable_fips_mode(ErlNifEnv* env, int argc, const ERL_NIF_TER
     }
 }
 
+
+#if defined(HAVE_EC)
 static ERL_NIF_TERM make_badarg_maybe(ErlNifEnv* env)
 {
     ERL_NIF_TERM reason;
@@ -1233,6 +1390,7 @@ static ERL_NIF_TERM make_badarg_maybe(ErlNifEnv* env)
     else
 	return enif_make_badarg(env);
 }
+#endif
 
 static ERL_NIF_TERM hash_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
 {/* (Type, Data) */
@@ -1668,7 +1826,7 @@ static ERL_NIF_TERM hmac_update_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM
 {/* (Context, Data) */
     ErlNifBinary data;
     struct hmac_context* obj;
-    
+
     if (!enif_get_resource(env, argv[0], hmac_context_rtype, (void**)&obj)
 	|| !enif_inspect_iolist_as_binary(env, argv[1], &data)) {
 	return enif_make_badarg(env);
@@ -1704,13 +1862,13 @@ static ERL_NIF_TERM hmac_final_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM
 	enif_mutex_unlock(obj->mtx);
 	return enif_make_badarg(env);
     }
-    
+
     HMAC_Final(obj->ctx, mac_buf, &mac_len);
     HMAC_CTX_free(obj->ctx);
     obj->alive = 0;
     enif_mutex_unlock(obj->mtx);
 
-    if (argc == 2 && req_len < mac_len) { 
+    if (argc == 2 && req_len < mac_len) {
         /* Only truncate to req_len bytes if asked. */
         mac_len = req_len;
     }
@@ -2021,7 +2179,7 @@ static ERL_NIF_TERM aes_ctr_stream_init(ErlNifEnv* env, int argc, const ERL_NIF_
 }
 
 static ERL_NIF_TERM aes_ctr_stream_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
-{/* ({Key, IVec, ECount, Num}, Data) */    
+{/* ({Key, IVec, ECount, Num}, Data) */
     ErlNifBinary key_bin, ivec_bin, text_bin, ecount_bin;
     AES_KEY aes_key;
     unsigned int num;
@@ -2042,14 +2200,14 @@ static ERL_NIF_TERM aes_ctr_stream_encrypt(ErlNifEnv* env, int argc, const ERL_N
         return enif_make_badarg(env);
     }
 
-    ivec2_buf = enif_make_new_binary(env, ivec_bin.size, &ivec2_term); 
+    ivec2_buf = enif_make_new_binary(env, ivec_bin.size, &ivec2_term);
     ecount2_buf = enif_make_new_binary(env, ecount_bin.size, &ecount2_term);
-    
+
     memcpy(ivec2_buf, ivec_bin.data, 16);
     memcpy(ecount2_buf, ecount_bin.data, ecount_bin.size);
 
     AES_ctr128_encrypt((unsigned char *) text_bin.data,
-		       enif_make_new_binary(env, text_bin.size, &cipher_term), 
+		       enif_make_new_binary(env, text_bin.size, &cipher_term),
 		       text_bin.size, &aes_key, ivec2_buf, ecount2_buf, &num);
 
     num2_term = enif_make_uint(env, num);
@@ -2352,7 +2510,7 @@ out_err:
 }
 
 static ERL_NIF_TERM strong_rand_bytes_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
-{/* (Bytes) */     
+{/* (Bytes) */
     unsigned bytes;
     unsigned char* data;
     ERL_NIF_TERM ret;
@@ -2446,7 +2604,7 @@ static ERL_NIF_TERM rand_uniform_nif(ErlNifEnv* env, int argc, const ERL_NIF_TER
 
     bn_to = BN_new();
     BN_sub(bn_to, bn_rand, bn_from);
-    BN_pseudo_rand_range(bn_rand, bn_to);      
+    BN_pseudo_rand_range(bn_rand, bn_to);
     BN_add(bn_rand, bn_rand, bn_from);
     dlen = BN_num_bytes(bn_rand);
     data = enif_make_new_binary(env, dlen+4, &ret);
@@ -2464,7 +2622,7 @@ static ERL_NIF_TERM mod_exp_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM arg
     BIGNUM *bn_base=NULL, *bn_exponent=NULL, *bn_modulo=NULL, *bn_result;
     BN_CTX *bn_ctx;
     unsigned char* ptr;
-    unsigned dlen;      
+    unsigned dlen;
     unsigned bin_hdr; /* return type: 0=plain binary, 4: mpint */
     unsigned extra_byte;
     ERL_NIF_TERM ret;
@@ -2485,7 +2643,7 @@ static ERL_NIF_TERM mod_exp_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM arg
     dlen = BN_num_bytes(bn_result);
     extra_byte = bin_hdr && BN_is_bit_set(bn_result, dlen*8-1);
     ptr = enif_make_new_binary(env, bin_hdr+extra_byte+dlen, &ret);
-    if (bin_hdr) {	
+    if (bin_hdr) {
 	put_int32(ptr, extra_byte+dlen);
 	ptr[4] = 0; /* extra zeroed byte to ensure a positive mpint */
 	ptr += bin_hdr + extra_byte;
@@ -2545,6 +2703,7 @@ static struct cipher_type_t* get_cipher_type(ERL_NIF_TERM type, size_t key_len)
     return NULL;
 }
 
+
 static ERL_NIF_TERM do_exor(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
 {/* (Data1, Data2) */
     ErlNifBinary d1, d2;
@@ -2578,7 +2737,7 @@ static ERL_NIF_TERM rc4_set_key(ErlNifEnv* env, int argc, const ERL_NIF_TERM arg
 	return enif_make_badarg(env);
     }
     RC4_set_key((RC4_KEY*)enif_make_new_binary(env, sizeof(RC4_KEY), &ret),
-		key.size, key.data);        
+		key.size, key.data);
     return ret;
 #else
     return enif_raise_exception(env, atom_notsup);
@@ -2843,70 +3002,6 @@ static ERL_NIF_TERM rsa_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF
 			     rsa_generate_key, argc, argv);
 }
 
-static ERL_NIF_TERM dh_generate_parameters_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
-{/* (PrimeLen, Generator) */
-    int prime_len, generator;
-    DH* dh_params;
-    int p_len, g_len;
-    unsigned char *p_ptr, *g_ptr;
-    ERL_NIF_TERM ret_p, ret_g;
-    const BIGNUM *dh_p, *dh_q, *dh_g;
-
-    if (!enif_get_int(env, argv[0], &prime_len)
-	|| !enif_get_int(env, argv[1], &generator)) {
-
-	return enif_make_badarg(env);
-    }
-    dh_params = DH_generate_parameters(prime_len, generator, NULL, NULL);
-    if (dh_params == NULL) {
-	return atom_error;
-    }
-    DH_get0_pqg(dh_params, &dh_p, &dh_q, &dh_g);
-    DH_free(dh_params);
-    p_len = BN_num_bytes(dh_p);
-    g_len = BN_num_bytes(dh_g);
-    p_ptr = enif_make_new_binary(env, p_len, &ret_p);
-    g_ptr = enif_make_new_binary(env, g_len, &ret_g);
-    BN_bn2bin(dh_p, p_ptr);
-    BN_bn2bin(dh_g, g_ptr);
-    ERL_VALGRIND_MAKE_MEM_DEFINED(p_ptr, p_len);
-    ERL_VALGRIND_MAKE_MEM_DEFINED(g_ptr, g_len);
-    return enif_make_list2(env, ret_p, ret_g);    
-}
-
-static ERL_NIF_TERM dh_check(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
-{/* ([PrimeLen, Generator]) */
-    DH* dh_params;
-    int i;
-    ERL_NIF_TERM ret, head, tail;
-    BIGNUM *dh_p, *dh_g;
-
-    if (!enif_get_list_cell(env, argv[0], &head, &tail)   
-	|| !get_bn_from_bin(env, head, &dh_p)
-	|| !enif_get_list_cell(env, tail, &head, &tail)   
-	|| !get_bn_from_bin(env, head, &dh_g)
-	|| !enif_is_empty_list(env,tail)) {
-
-	return enif_make_badarg(env);
-    }
-
-    dh_params = DH_new();
-    DH_set0_pqg(dh_params, dh_p, NULL, dh_g);
-    if (DH_check(dh_params, &i)) {
-	if (i == 0) ret = atom_ok;
-	else if (i & DH_CHECK_P_NOT_PRIME) ret = atom_not_prime;
-	else if (i & DH_CHECK_P_NOT_SAFE_PRIME)	ret = atom_not_strong_prime;
-	else if (i & DH_UNABLE_TO_CHECK_GENERATOR) ret = atom_unable_to_check_generator;
-	else if (i & DH_NOT_SUITABLE_GENERATOR)	ret = atom_not_suitable_generator;
-	else ret = enif_make_tuple2(env, atom_unknown, enif_make_uint(env, i));
-    }
-    else { /* Check Failed */       
-	ret = enif_make_tuple2(env, atom_error, atom_check_failed);
-    }
-    DH_free(dh_params);
-    return ret;
-}   
-
 static ERL_NIF_TERM dh_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
 {/* (PrivKey|undefined, DHParams=[P,G], Mpint, Len|0) */
     DH* dh_params;
@@ -3007,7 +3102,7 @@ static ERL_NIF_TERM dh_compute_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_T
 	i = DH_compute_key(ret_bin.data, other_pub_key, dh_params);
 	if (i > 0) {
 	    if (i != ret_bin.size) {
-		enif_realloc_binary(&ret_bin, i); 
+		enif_realloc_binary(&ret_bin, i);
 	    }
 	    ret = enif_make_binary(env, &ret_bin);
 	}
@@ -3803,9 +3898,69 @@ static int get_pkey_sign_options(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF
 }
 
 
+#ifdef HAS_ENGINE_SUPPORT
+static int get_engine_and_key_id(ErlNifEnv *env, ERL_NIF_TERM key, char ** id, ENGINE **e)
+{
+    ERL_NIF_TERM engine_res, key_id_term;
+    struct engine_ctx *ctx;
+    ErlNifBinary key_id_bin;
+
+    if (!enif_get_map_value(env, key, atom_engine, &engine_res) ||
+        !enif_get_resource(env, engine_res, engine_ctx_rtype, (void**)&ctx) ||
+        !enif_get_map_value(env, key, atom_key_id, &key_id_term) ||
+        !enif_inspect_binary(env, key_id_term, &key_id_bin)) {
+        return 0;
+    }
+    else {
+        *e = ctx->engine;
+        return zero_terminate(key_id_bin, id);
+    }
+}
+
+
+static char *get_key_password(ErlNifEnv *env, ERL_NIF_TERM key) {
+    ERL_NIF_TERM tmp_term;
+    ErlNifBinary pwd_bin;
+    char *pwd;
+    if (enif_get_map_value(env, key, atom_password, &tmp_term) &&
+        enif_inspect_binary(env, tmp_term, &pwd_bin) &&
+        zero_terminate(pwd_bin, &pwd)
+        ) return pwd;
+
+    return NULL;
+}
+
+static int zero_terminate(ErlNifBinary bin, char **buf) {
+    *buf = enif_alloc(bin.size+1);
+    if (!*buf)
+        return 0;
+    memcpy(*buf, bin.data, bin.size);
+    *(*buf+bin.size) = 0;
+    return 1;
+}
+#endif
+
 static int get_pkey_private_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM key, EVP_PKEY **pkey)
 {
-    if (algorithm == atom_rsa) {
+    if (enif_is_map(env, key)) {
+#ifdef HAS_ENGINE_SUPPORT
+        /* Use key stored in engine */
+        ENGINE *e;
+        char *id;
+        char *password;
+
+        if (!get_engine_and_key_id(env, key, &id, &e))
+            return PKEY_BADARG;
+        password = get_key_password(env, key);
+        *pkey = ENGINE_load_private_key(e, id, NULL, password);
+        if (!*pkey)
+            return PKEY_BADARG;
+        enif_free(id);
+#else
+        return PKEY_BADARG;
+#endif
+    }
+    else if (algorithm == atom_rsa) {
 	RSA *rsa = RSA_new();
 
 	if (!get_rsa_private_key(env, key, rsa)) {
@@ -3866,7 +4021,24 @@ static int get_pkey_private_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_
 static int get_pkey_public_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM key,
 			       EVP_PKEY **pkey)
 {
-    if (algorithm == atom_rsa) {
+    if (enif_is_map(env, key)) {
+#ifdef HAS_ENGINE_SUPPORT
+        /* Use key stored in engine */
+        ENGINE *e;
+        char *id;
+        char *password;
+
+        if (!get_engine_and_key_id(env, key, &id, &e))
+            return PKEY_BADARG;
+        password = get_key_password(env, key);
+        *pkey = ENGINE_load_public_key(e, id, NULL, password);
+        if (!pkey)
+            return PKEY_BADARG;
+        enif_free(id);
+#else
+        return PKEY_BADARG;
+#endif
+    } else  if (algorithm == atom_rsa) {
 	RSA *rsa = RSA_new();
 
 	if (!get_rsa_public_key(env, key, rsa)) {
@@ -3924,7 +4096,7 @@ static int get_pkey_public_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_T
 }
 
 static ERL_NIF_TERM pkey_sign_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
-{/* (Algorithm, Type, Data|{digest,Digest}, Key, Options) */
+{/* (Algorithm, Type, Data|{digest,Digest}, Key|#{}, Options) */
     int i;
     const EVP_MD *md = NULL;
     unsigned char md_value[EVP_MAX_MD_SIZE];
@@ -3944,6 +4116,13 @@ enif_get_atom(env,argv[0],buf,1024,ERL_NIF_LATIN1); printf("algo=%s ",buf);
 enif_get_atom(env,argv[1],buf,1024,ERL_NIF_LATIN1); printf("hash=%s ",buf);
 printf("\r\n");
 */
+
+#ifndef HAS_ENGINE_SUPPORT
+    if (enif_is_map(env, argv[3])) {
+        return atom_notsup;
+    }
+#endif
+
     i = get_pkey_sign_digest(env, argv[0], argv[1], argv[2], md_value, &md, &tbs, &tbslen);
     if (i != PKEY_OK) {
 	if (i == PKEY_NOTSUP)
@@ -3965,10 +4144,9 @@ printf("\r\n");
     }
 
 #ifdef HAS_EVP_PKEY_CTX
-/* printf("EVP interface\r\n"); 
- */
     ctx = EVP_PKEY_CTX_new(pkey, NULL);
     if (!ctx) goto badarg;
+
     if (EVP_PKEY_sign_init(ctx) <= 0) goto badarg;
     if (md != NULL && EVP_PKEY_CTX_set_signature_md(ctx, md) <= 0) goto badarg;
 
@@ -4070,6 +4248,12 @@ static ERL_NIF_TERM pkey_verify_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
     unsigned char *tbs; /* data to be signed */
     size_t tbslen;
 
+#ifndef HAS_ENGINE_SUPPORT
+    if (enif_is_map(env, argv[4])) {
+        return atom_notsup;
+    }
+#endif
+
     if (!enif_inspect_binary(env, argv[3], &sig_bin)) {
 	return enif_make_badarg(env);
     }
@@ -4095,7 +4279,7 @@ static ERL_NIF_TERM pkey_verify_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
     }
 
 #ifdef HAS_EVP_PKEY_CTX
-/* printf("EVP interface\r\n"); 
+/* printf("EVP interface\r\n");
  */
     ctx = EVP_PKEY_CTX_new(pkey, NULL);
     if (!ctx) goto badarg;
@@ -4207,8 +4391,10 @@ static int get_pkey_crypt_options(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NI
 			opt->rsa_padding = RSA_PKCS1_PADDING;
 		    } else if (tpl_terms[1] == atom_rsa_pkcs1_oaep_padding) {
 			opt->rsa_padding = RSA_PKCS1_OAEP_PADDING;
+#ifdef HAVE_RSA_SSLV23_PADDING
 		    } else if (tpl_terms[1] == atom_rsa_sslv23_padding) {
 			opt->rsa_padding = RSA_SSLV23_PADDING;
+#endif
 		    } else if (tpl_terms[1] == atom_rsa_x931_padding) {
 			opt->rsa_padding = RSA_X931_PADDING;
 		    } else if (tpl_terms[1] == atom_rsa_no_padding) {
@@ -4274,13 +4460,22 @@ static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
 #endif
     PKeyCryptOptions crypt_opt;
     ErlNifBinary in_bin, out_bin, tmp_bin;
-    size_t outlen, tmplen;
+    size_t outlen;
+#ifdef HAVE_RSA_SSLV23_PADDING
+    size_t tmplen;
+#endif
     int is_private = (argv[4] == atom_true),
         is_encrypt = (argv[5] == atom_true);
     int algo_init = 0;
 
 /* char algo[1024]; */
-   
+
+#ifndef HAS_ENGINE_SUPPORT
+    if (enif_is_map(env, argv[2])) {
+        return atom_notsup;
+    }
+#endif
+
     if (!enif_inspect_binary(env, argv[1], &in_bin)) {
 	return enif_make_badarg(env);
     }
@@ -4348,6 +4543,7 @@ static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
 	if (crypt_opt.signature_md != NULL
 	    && EVP_PKEY_CTX_set_signature_md(ctx, crypt_opt.signature_md) <= 0)
 		goto badarg;
+#ifdef HAVE_RSA_SSLV23_PADDING
 	if (crypt_opt.rsa_padding == RSA_SSLV23_PADDING) {
 	    if (is_encrypt) {
 		RSA *rsa = EVP_PKEY_get1_RSA(pkey);
@@ -4359,9 +4555,11 @@ static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
 		in_bin = tmp_bin;
 	    }
 	    if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_NO_PADDING) <= 0) goto badarg;
-	} else {
+	} else
+#endif
+                {
 	    if (EVP_PKEY_CTX_set_rsa_padding(ctx, crypt_opt.rsa_padding) <= 0) goto badarg;
-	}
+        }
 #ifdef HAVE_RSA_OAEP_MD
 	if (crypt_opt.rsa_padding == RSA_PKCS1_OAEP_PADDING) {
 	    if (crypt_opt.rsa_oaep_md != NULL
@@ -4409,7 +4607,6 @@ static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
 
     enif_alloc_binary(outlen, &out_bin);
 
-    ERL_VALGRIND_ASSERT_MEM_DEFINED(out_bin.data, out_bin.size);
     if (is_private) {
 	if (is_encrypt) {
 	    /* private_encrypt */
@@ -4481,6 +4678,7 @@ static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
 #endif
 
     if ((i > 0) && argv[0] == atom_rsa && !is_encrypt) {
+#ifdef HAVE_RSA_SSLV23_PADDING
 	if (crypt_opt.rsa_padding == RSA_SSLV23_PADDING) {
 	    RSA *rsa = EVP_PKEY_get1_RSA(pkey);
 	    unsigned char *p;
@@ -4498,6 +4696,7 @@ static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
 		i = 1;
 	    }
 	}
+#endif
     }
 
     if (tmp_bin.data != NULL) {
@@ -4542,6 +4741,80 @@ static ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM
 
 
 /*--------------------------------*/
+static ERL_NIF_TERM privkey_to_pubkey_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{ /* (Algorithm, PrivKey | KeyMap) */
+    EVP_PKEY *pkey;
+    ERL_NIF_TERM alg = argv[0];
+    ERL_NIF_TERM result[8];
+    if (get_pkey_private_key(env, alg, argv[1], &pkey) != PKEY_OK) {
+	return enif_make_badarg(env);
+    }
+
+    if (alg == atom_rsa) {
+        const BIGNUM *n = NULL, *e = NULL, *d = NULL;
+        RSA *rsa = EVP_PKEY_get1_RSA(pkey);
+        if (rsa) {
+            RSA_get0_key(rsa, &n, &e, &d);
+            result[0] = bin_from_bn(env, e);  // Exponent E
+            result[1] = bin_from_bn(env, n);  // Modulus N = p*q
+            EVP_PKEY_free(pkey);
+            return enif_make_list_from_array(env, result, 2);
+        }
+
+    } else if (argv[0] == atom_dss) {
+        const BIGNUM *p = NULL, *q = NULL, *g = NULL, *pub_key = NULL;
+        DSA *dsa = EVP_PKEY_get1_DSA(pkey);
+        if (dsa) {
+            DSA_get0_pqg(dsa, &p, &q, &g);
+            DSA_get0_key(dsa, &pub_key, NULL);
+            result[0] = bin_from_bn(env, p);
+            result[1] = bin_from_bn(env, q);
+            result[2] = bin_from_bn(env, g);
+            result[3] = bin_from_bn(env, pub_key);
+            EVP_PKEY_free(pkey);
+            return enif_make_list_from_array(env, result, 4);
+        }
+
+    } else if (argv[0] == atom_ecdsa) {
+#if defined(HAVE_EC)
+        /* not yet implemented
+          EC_KEY *ec = EVP_PKEY_get1_EC_KEY(pkey);
+          if (ec) {
+          / * Example of result:
+               {
+                 Curve =  {Field, Prime, Point, Order, CoFactor} =
+                    { 
+                      Field =  {prime_field,<<255,...,255>>},
+                      Prime = {<<255,...,252>>,
+                               <<90,...,75>>,
+                               <<196,...,144>>
+                              },
+                      Point =    <<4,...,245>>,
+                      Order =    <<255,...,81>>,
+                      CoFactor = <<1>>
+                    },
+                Key = <<151,...,62>>
+                }
+              or
+              { 
+                Curve =
+                    {characteristic_two_field, 
+                     M,
+                     Basis = {tpbasis, _}
+                           | {ppbasis, k1, k2, k3}
+                    },
+                Key
+               }
+        * /
+            EVP_PKEY_free(pkey);
+            return enif_make_list_from_array(env, ..., ...);
+        */
+#endif
+    }
+    
+    if (pkey) EVP_PKEY_free(pkey);
+    return enif_make_badarg(env);
+}
 
 /*================================================================*/
 
@@ -4554,3 +4827,600 @@ static ERL_NIF_TERM rand_seed_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM a
     RAND_seed(seed_bin.data,seed_bin.size);
     return atom_ok;
 }
+
+/*================================================================*/
+/* Engine */
+/*================================================================*/
+static ERL_NIF_TERM engine_by_id_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (EngineId) */
+#ifdef HAS_ENGINE_SUPPORT
+    ERL_NIF_TERM ret;
+    ErlNifBinary engine_id_bin;
+    char *engine_id;
+    ENGINE *engine;
+    struct engine_ctx *ctx;
+
+    // Get Engine Id
+    if(!enif_inspect_binary(env, argv[0], &engine_id_bin)) {
+        PRINTF_ERR0("engine_by_id_nif Leaved: badarg");
+        return enif_make_badarg(env);
+    } else {
+        engine_id = enif_alloc(engine_id_bin.size+1);
+        (void) memcpy(engine_id, engine_id_bin.data, engine_id_bin.size);
+        engine_id[engine_id_bin.size] = '\0';
+    }
+
+    engine = ENGINE_by_id(engine_id);
+    if(!engine) {
+        enif_free(engine_id);
+        PRINTF_ERR0("engine_by_id_nif Leaved: {error, bad_engine_id}");
+        return enif_make_tuple2(env, atom_error, atom_bad_engine_id);
+    }
+
+    ctx = enif_alloc_resource(engine_ctx_rtype, sizeof(struct engine_ctx));
+    ctx->engine = engine;
+    ctx->id = engine_id;
+
+    ret = enif_make_resource(env, ctx);
+    enif_release_resource(ctx);
+
+    return enif_make_tuple2(env, atom_ok, ret);
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_init_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    ERL_NIF_TERM ret = atom_ok;
+    struct engine_ctx *ctx;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_init_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+    if (!ENGINE_init(ctx->engine)) {
+        //ERR_print_errors_fp(stderr);
+        PRINTF_ERR0("engine_init_nif Leaved: {error, engine_init_failed}");
+        return enif_make_tuple2(env, atom_error, atom_engine_init_failed);
+    }
+
+    return ret;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_free_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    struct engine_ctx *ctx;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_free_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+
+    ENGINE_free(ctx->engine);
+    return atom_ok;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_finish_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    struct engine_ctx *ctx;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_finish_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+
+    ENGINE_finish(ctx->engine);
+    return atom_ok;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_load_dynamic_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* () */
+#ifdef HAS_ENGINE_SUPPORT
+    ENGINE_load_dynamic();
+    return atom_ok;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_ctrl_cmd_strings_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine, Commands) */
+#ifdef HAS_ENGINE_SUPPORT
+    ERL_NIF_TERM ret = atom_ok;
+    unsigned int cmds_len = 0;
+    char **cmds = NULL;
+    struct engine_ctx *ctx;
+    int i, optional = 0;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_ctrl_cmd_strings_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+
+    PRINTF_ERR1("Engine Id:  %s\r\n", ENGINE_get_id(ctx->engine));
+
+    // Get Command List
+    if(!enif_get_list_length(env, argv[1], &cmds_len)) {
+        PRINTF_ERR0("engine_ctrl_cmd_strings_nif Leaved: Bad Command List");
+        return enif_make_badarg(env);
+    } else {
+        cmds_len *= 2; // Key-Value list from erlang
+        cmds = enif_alloc((cmds_len+1)*sizeof(char*));
+        if(get_engine_load_cmd_list(env, argv[1], cmds, 0)) {
+            PRINTF_ERR0("engine_ctrl_cmd_strings_nif Leaved: Couldn't read Command List");
+            ret = enif_make_badarg(env);
+            goto error;
+        }
+    }
+
+    if(!enif_get_int(env, argv[2], &optional)) {
+        PRINTF_ERR0("engine_ctrl_cmd_strings_nif Leaved: Parameter optional not an integer");
+        return enif_make_badarg(env);
+    }
+
+    for(i = 0; i < cmds_len; i+=2) {
+        PRINTF_ERR2("Cmd:  %s:%s\r\n",
+                   cmds[i] ? cmds[i] : "(NULL)",
+                   cmds[i+1] ? cmds[i+1] : "(NULL)");
+        if(!ENGINE_ctrl_cmd_string(ctx->engine, cmds[i], cmds[i+1], optional)) {
+            PRINTF_ERR2("Command failed:  %s:%s\r\n",
+                        cmds[i] ? cmds[i] : "(NULL)",
+                        cmds[i+1] ? cmds[i+1] : "(NULL)");
+            //ENGINE_free(ctx->engine);
+            ret = enif_make_tuple2(env, atom_error, atom_ctrl_cmd_failed);
+            PRINTF_ERR0("engine_ctrl_cmd_strings_nif Leaved: {error, ctrl_cmd_failed}");
+            goto error;
+        }
+    }
+
+ error:
+    for(i = 0; cmds != NULL && cmds[i] != NULL; i++)
+        enif_free(cmds[i]);    
+    enif_free(cmds);
+    return ret;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_add_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    struct engine_ctx *ctx;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_add_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+
+    if (!ENGINE_add(ctx->engine)) {
+        PRINTF_ERR0("engine_add_nif Leaved: {error, add_engine_failed}");
+        return enif_make_tuple2(env, atom_error, atom_add_engine_failed);
+    }
+    return atom_ok;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_remove_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    struct engine_ctx *ctx;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_remove_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+
+    if (!ENGINE_remove(ctx->engine)) {
+        PRINTF_ERR0("engine_remove_nif Leaved: {error, remove_engine_failed}");
+        return enif_make_tuple2(env, atom_error, atom_remove_engine_failed);
+    }
+    return atom_ok;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_register_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine, EngineMethod) */
+#ifdef HAS_ENGINE_SUPPORT
+    struct engine_ctx *ctx;
+    unsigned int method;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_register_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+    // Get Method
+    if (!enif_get_uint(env, argv[1], &method)) {
+        PRINTF_ERR0("engine_register_nif Leaved: Parameter Method not an uint");
+        return enif_make_badarg(env);
+    }
+
+    switch(method)
+    {
+#ifdef ENGINE_METHOD_RSA
+    case ENGINE_METHOD_RSA:
+        if (!ENGINE_register_RSA(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_DSA
+    case ENGINE_METHOD_DSA:
+        if (!ENGINE_register_DSA(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_DH
+    case ENGINE_METHOD_DH:
+        if (!ENGINE_register_DH(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_RAND
+    case ENGINE_METHOD_RAND:
+        if (!ENGINE_register_RAND(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_ECDH
+    case ENGINE_METHOD_ECDH:
+        if (!ENGINE_register_ECDH(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_ECDSA
+    case ENGINE_METHOD_ECDSA:
+        if (!ENGINE_register_ECDSA(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_STORE
+    case ENGINE_METHOD_STORE:
+        if (!ENGINE_register_STORE(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_CIPHERS
+    case ENGINE_METHOD_CIPHERS:
+        if (!ENGINE_register_ciphers(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_DIGESTS
+    case ENGINE_METHOD_DIGESTS:
+        if (!ENGINE_register_digests(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_PKEY_METHS
+    case ENGINE_METHOD_PKEY_METHS:
+        if (!ENGINE_register_pkey_meths(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_PKEY_ASN1_METHS
+    case ENGINE_METHOD_PKEY_ASN1_METHS:
+        if (!ENGINE_register_pkey_asn1_meths(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+#ifdef ENGINE_METHOD_EC
+    case ENGINE_METHOD_EC:
+        if (!ENGINE_register_EC(ctx->engine))
+            return enif_make_tuple2(env, atom_error, atom_register_engine_failed);
+        break;
+#endif
+    default:
+        return  enif_make_tuple2(env, atom_error, atom_engine_method_not_supported);
+        break;
+    }
+    return atom_ok;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_unregister_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine, EngineMethod) */
+#ifdef HAS_ENGINE_SUPPORT
+    struct engine_ctx *ctx;
+    unsigned int method;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_unregister_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+    // Get Method
+    if (!enif_get_uint(env, argv[1], &method)) {
+        PRINTF_ERR0("engine_unregister_nif Leaved: Parameter Method not an uint");
+        return enif_make_badarg(env);
+    }
+
+    switch(method)
+    {
+#ifdef ENGINE_METHOD_RSA
+    case ENGINE_METHOD_RSA:
+        ENGINE_unregister_RSA(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_DSA
+    case ENGINE_METHOD_DSA:
+        ENGINE_unregister_DSA(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_DH
+    case ENGINE_METHOD_DH:
+        ENGINE_unregister_DH(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_RAND
+    case ENGINE_METHOD_RAND:
+        ENGINE_unregister_RAND(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_ECDH
+    case ENGINE_METHOD_ECDH:
+        ENGINE_unregister_ECDH(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_ECDSA
+    case ENGINE_METHOD_ECDSA:
+        ENGINE_unregister_ECDSA(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_STORE
+    case ENGINE_METHOD_STORE:
+        ENGINE_unregister_STORE(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_CIPHERS
+    case ENGINE_METHOD_CIPHERS:
+        ENGINE_unregister_ciphers(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_DIGESTS
+    case ENGINE_METHOD_DIGESTS:
+        ENGINE_unregister_digests(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_PKEY_METHS
+    case ENGINE_METHOD_PKEY_METHS:
+        ENGINE_unregister_pkey_meths(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_PKEY_ASN1_METHS
+    case ENGINE_METHOD_PKEY_ASN1_METHS:
+        ENGINE_unregister_pkey_asn1_meths(ctx->engine);
+        break;
+#endif
+#ifdef ENGINE_METHOD_EC
+    case ENGINE_METHOD_EC:
+        ENGINE_unregister_EC(ctx->engine);
+        break;
+#endif
+    default:
+        break;
+    }
+    return atom_ok;
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_get_first_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    ERL_NIF_TERM ret;
+    ENGINE *engine;
+    ErlNifBinary engine_bin;
+    struct engine_ctx *ctx;
+
+    engine = ENGINE_get_first();
+    if(!engine) {
+        enif_alloc_binary(0, &engine_bin);
+        engine_bin.size = 0;
+        return enif_make_tuple2(env, atom_ok, enif_make_binary(env, &engine_bin));
+    }
+
+    ctx = enif_alloc_resource(engine_ctx_rtype, sizeof(struct engine_ctx));
+    ctx->engine = engine;
+    ctx->id = NULL;
+
+    ret = enif_make_resource(env, ctx);
+    enif_release_resource(ctx);
+
+    return enif_make_tuple2(env, atom_ok, ret);
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_get_next_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    ERL_NIF_TERM ret;
+    ENGINE *engine;
+    ErlNifBinary engine_bin;
+    struct engine_ctx *ctx, *next_ctx;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_get_next_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+    engine = ENGINE_get_next(ctx->engine);
+    if (!engine) {
+        enif_alloc_binary(0, &engine_bin);
+        engine_bin.size = 0;
+        return enif_make_tuple2(env, atom_ok, enif_make_binary(env, &engine_bin));
+    }
+
+    next_ctx = enif_alloc_resource(engine_ctx_rtype, sizeof(struct engine_ctx));
+    next_ctx->engine = engine;
+    next_ctx->id = NULL;
+
+    ret = enif_make_resource(env, next_ctx);
+    enif_release_resource(next_ctx);
+
+    return enif_make_tuple2(env, atom_ok, ret);
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_get_id_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Engine) */
+#ifdef HAS_ENGINE_SUPPORT
+    ErlNifBinary engine_id_bin;
+    const char *engine_id;
+    int size;
+    struct engine_ctx *ctx;
+
+    // Get Engine
+    if (!enif_get_resource(env, argv[0], engine_ctx_rtype, (void**)&ctx)) {
+        PRINTF_ERR0("engine_get_id_nif Leaved: Parameter not an engine resource object");
+        return enif_make_badarg(env);
+    }
+
+    engine_id = ENGINE_get_id(ctx->engine);
+    if (!engine_id) {
+        enif_alloc_binary(0, &engine_id_bin);
+        engine_id_bin.size = 0;
+        return enif_make_tuple2(env, atom_ok, enif_make_binary(env, &engine_id_bin));
+    }
+
+    size = strlen(engine_id);
+    enif_alloc_binary(size, &engine_id_bin);
+    engine_id_bin.size = size;
+    memcpy(engine_id_bin.data, engine_id, size);
+
+    return enif_make_tuple2(env, atom_ok, enif_make_binary(env, &engine_id_bin));
+#else
+    return atom_notsup;
+#endif
+}
+
+static int get_engine_load_cmd_list(ErlNifEnv* env, const ERL_NIF_TERM term, char **cmds, int i)
+{
+#ifdef HAS_ENGINE_SUPPORT
+    ERL_NIF_TERM head, tail;
+    const ERL_NIF_TERM *tmp_tuple;
+    ErlNifBinary tmpbin;
+    int arity;
+    char* tmpstr;
+
+    if(!enif_is_empty_list(env, term)) {
+        if(!enif_get_list_cell(env, term, &head, &tail)) {
+            cmds[i] = NULL;
+            return -1;
+        } else {
+            if(!enif_get_tuple(env, head, &arity, &tmp_tuple)  || arity != 2) {
+                cmds[i] = NULL;
+                return -1;
+            } else {
+                if(!enif_inspect_binary(env, tmp_tuple[0], &tmpbin)) {
+                    cmds[i] = NULL;
+                    return -1;
+                } else {
+                    tmpstr = enif_alloc(tmpbin.size+1);
+                    (void) memcpy(tmpstr, tmpbin.data, tmpbin.size);
+                    tmpstr[tmpbin.size] = '\0';
+                    cmds[i++] = tmpstr;
+                }
+                if(!enif_inspect_binary(env, tmp_tuple[1], &tmpbin)) {
+                    cmds[i] = NULL;
+                    return -1;
+                } else {
+                    if(tmpbin.size == 0)
+                        cmds[i++] = NULL;
+                    else {
+                        tmpstr = enif_alloc(tmpbin.size+1);
+                        (void) memcpy(tmpstr, tmpbin.data, tmpbin.size);
+                        tmpstr[tmpbin.size] = '\0';
+                        cmds[i++] = tmpstr;
+                    }
+                }
+                return get_engine_load_cmd_list(env, tail, cmds, i);
+            }
+        }
+    } else {
+        cmds[i] = NULL;
+        return 0;
+    }
+#else
+    return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM engine_get_all_methods_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* () */
+#ifdef HAS_ENGINE_SUPPORT
+    ERL_NIF_TERM method_array[12];
+    int i = 0;
+
+#ifdef ENGINE_METHOD_RSA
+    method_array[i++] = atom_engine_method_rsa;
+#endif
+#ifdef ENGINE_METHOD_DSA
+    method_array[i++] = atom_engine_method_dsa;
+#endif
+#ifdef ENGINE_METHOD_DH
+    method_array[i++] = atom_engine_method_dh;
+#endif
+#ifdef ENGINE_METHOD_RAND
+    method_array[i++] = atom_engine_method_rand;
+#endif
+#ifdef ENGINE_METHOD_ECDH
+    method_array[i++] = atom_engine_method_ecdh;
+#endif
+#ifdef ENGINE_METHOD_ECDSA
+    method_array[i++] = atom_engine_method_ecdsa;
+#endif
+#ifdef ENGINE_METHOD_STORE
+    method_array[i++] = atom_engine_method_store;
+#endif
+#ifdef ENGINE_METHOD_CIPHERS
+    method_array[i++] = atom_engine_method_ciphers;
+#endif
+#ifdef ENGINE_METHOD_DIGESTS
+    method_array[i++] = atom_engine_method_digests;
+#endif
+#ifdef ENGINE_METHOD_PKEY_METHS
+    method_array[i++] = atom_engine_method_pkey_meths;
+#endif
+#ifdef ENGINE_METHOD_PKEY_ASN1_METHS
+    method_array[i++] = atom_engine_method_pkey_asn1_meths;
+#endif
+#ifdef ENGINE_METHOD_EC
+    method_array[i++] = atom_engine_method_ec;
+#endif
+
+    return enif_make_list_from_array(env, method_array, i);
+#else
+    return atom_notsup;
+#endif
+}
diff --git a/lib/crypto/c_src/otp_test_engine.c b/lib/crypto/c_src/otp_test_engine.c
new file mode 100644
index 0000000000..5c6122c06a
--- /dev/null
+++ b/lib/crypto/c_src/otp_test_engine.c
@@ -0,0 +1,264 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2017-2017. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+#ifdef _WIN32
+#define OPENSSL_OPT_WINDLL
+#endif
+#include <stdio.h>
+#include <string.h>
+
+#include <openssl/engine.h>
+#include <openssl/md5.h>
+#include <openssl/rsa.h>
+#include <openssl/pem.h>
+
+#define PACKED_OPENSSL_VERSION(MAJ, MIN, FIX, P)	\
+    ((((((((MAJ << 8) | MIN) << 8 ) | FIX) << 8) | (P-'a'+1)) << 4) | 0xf)
+
+#define PACKED_OPENSSL_VERSION_PLAIN(MAJ, MIN, FIX) \
+    PACKED_OPENSSL_VERSION(MAJ,MIN,FIX,('a'-1))
+
+#if OPENSSL_VERSION_NUMBER < PACKED_OPENSSL_VERSION_PLAIN(1,1,0) \
+    || defined(LIBRESSL_VERSION_NUMBER)
+#define OLD
+#endif
+
+static const char *test_engine_id = "MD5";
+static const char *test_engine_name = "MD5 test engine";
+
+/* The callback that does the job of fetching keys on demand by the Engine */
+EVP_PKEY* test_key_load(ENGINE *er, const char *id, UI_METHOD *ui_method, void *callback_data);
+
+
+static int test_init(ENGINE *e) {
+    printf("OTP Test Engine Initializatzion!\r\n");
+    
+    /* Load all digest and cipher algorithms. Needed for password protected private keys */
+    OpenSSL_add_all_algorithms();
+
+    return 111;
+}
+
+static void add_test_data(unsigned char *md, unsigned int len)
+{
+    unsigned int i;
+
+    for (i=0; i<len; i++) {
+        md[i] = (unsigned char)(i & 0xff);
+    }
+}
+
+/* MD5 part */
+#undef data
+#ifdef OLD
+#define data(ctx) ((MD5_CTX *)ctx->md_data)
+#endif
+
+static int test_engine_md5_init(EVP_MD_CTX *ctx) {
+    fprintf(stderr, "MD5 initialized\r\n");
+#ifdef OLD
+    return MD5_Init(data(ctx));
+#else
+    return 1;
+#endif
+}
+
+static int test_engine_md5_update(EVP_MD_CTX *ctx,const void *data, size_t count)
+{
+    fprintf(stderr, "MD5 update\r\n");
+#ifdef OLD
+    return MD5_Update(data(ctx), data, (size_t)count);
+#else
+    return 1;
+#endif
+}
+
+static int test_engine_md5_final(EVP_MD_CTX *ctx,unsigned char *md) {
+#ifdef OLD
+    int ret;
+
+    fprintf(stderr, "MD5 final size of EVP_MD: %lu\r\n", sizeof(EVP_MD));
+    ret = MD5_Final(md, data(ctx));
+
+    if (ret > 0) {
+         add_test_data(md, MD5_DIGEST_LENGTH);
+    }
+    return ret;
+#else
+    fprintf(stderr, "MD5 final\r\n");
+    add_test_data(md, MD5_DIGEST_LENGTH);
+    return 1;
+#endif
+}
+
+#ifdef OLD
+static EVP_MD test_engine_md5_method=  {
+        NID_md5,                      /* The name ID for MD5 */
+        NID_undef,                    /* IGNORED: MD5 with private key encryption NID */
+        MD5_DIGEST_LENGTH,            /* Size of MD5 result, in bytes */
+        0,                            /* Flags */
+        test_engine_md5_init,         /* digest init */
+        test_engine_md5_update,       /* digest update */
+        test_engine_md5_final,        /* digest final */
+        NULL,                         /* digest copy */
+        NULL,                         /* digest cleanup */
+        EVP_PKEY_NULL_method,         /* IGNORED: pkey methods */
+        MD5_CBLOCK,                   /* Internal blocksize, see rfc1321/md5.h */
+        sizeof(EVP_MD *) + sizeof(MD5_CTX),
+        NULL,                          /* IGNORED: control function */
+};
+#endif
+
+static int test_digest_ids[] = {NID_md5};
+
+static int test_engine_digest_selector(ENGINE *e, const EVP_MD **digest,
+        const int **nids, int nid) {
+    int ok = 1;
+    if (!digest) {
+        *nids = test_digest_ids;
+        fprintf(stderr, "Digest is empty! Nid:%d\r\n", nid);
+        return 2;
+    }
+    fprintf(stderr, "Digest no %d requested\r\n",nid);
+    if (nid == NID_md5) {
+#ifdef OLD
+        *digest = &test_engine_md5_method;
+#else
+        EVP_MD *md = EVP_MD_meth_new(NID_md5, NID_undef);
+        if (!md ||
+            !EVP_MD_meth_set_result_size(md, MD5_DIGEST_LENGTH) ||
+            !EVP_MD_meth_set_flags(md, 0) ||
+            !EVP_MD_meth_set_init(md,  test_engine_md5_init) ||
+            !EVP_MD_meth_set_update(md,  test_engine_md5_update) ||
+            !EVP_MD_meth_set_final(md,  test_engine_md5_final) ||
+            !EVP_MD_meth_set_copy(md,  NULL) ||
+            !EVP_MD_meth_set_cleanup(md,  NULL) ||
+            !EVP_MD_meth_set_input_blocksize(md, MD5_CBLOCK) ||
+            !EVP_MD_meth_set_app_datasize(md, sizeof(EVP_MD *) + sizeof(MD5_CTX)) ||
+            !EVP_MD_meth_set_ctrl(md, NULL))
+            {
+                ok = 0;
+                *digest = NULL;
+            } else
+            {
+                *digest = md;
+            }
+#endif
+    }
+    else {
+        ok = 0;
+        *digest = NULL;
+    }
+    
+    return ok;
+}
+
+
+static int bind_helper(ENGINE * e, const char *id)
+{
+    if (!ENGINE_set_id(e, test_engine_id) ||
+        !ENGINE_set_name(e, test_engine_name) ||
+        !ENGINE_set_init_function(e, test_init) ||
+        !ENGINE_set_digests(e, &test_engine_digest_selector) ||
+        /* For testing of key storage in an Engine: */
+        !ENGINE_set_load_privkey_function(e, &test_key_load) ||
+        !ENGINE_set_load_pubkey_function(e, &test_key_load)
+    )
+        return 0;
+
+    return 1;
+}
+
+IMPLEMENT_DYNAMIC_CHECK_FN();
+
+IMPLEMENT_DYNAMIC_BIND_FN(bind_helper);
+
+/********************************************************
+ *
+ * Engine storage simulation
+ *
+ */
+int pem_passwd_cb_fun(char *buf, int size, int rwflag, void *password);
+
+EVP_PKEY* test_key_load(ENGINE *er, const char *id, UI_METHOD *ui_method, void *callback_data)
+{
+    EVP_PKEY *pkey = NULL;
+    FILE *f = fopen(id, "r");
+
+    if (!f) {
+            fprintf(stderr, "%s:%d fopen(%s) failed\r\n", __FILE__,__LINE__,id);
+            return NULL;
+    }
+
+    /* First try to read as a private key. If that fails, try to read as a public key: */
+    pkey = PEM_read_PrivateKey(f, NULL, pem_passwd_cb_fun, callback_data);
+    if (!pkey) {
+        /* ERR_print_errors_fp (stderr); */
+        fclose(f);
+        f = fopen(id, "r");
+        pkey = PEM_read_PUBKEY(f, NULL, NULL, NULL);
+    }
+    fclose(f);
+    
+    if (!pkey) {
+        fprintf(stderr, "%s:%d Key read from file %s failed.\r\n", __FILE__,__LINE__,id);
+        if (callback_data) 
+            fprintf(stderr, "Pwd = \"%s\".\r\n", (char *)callback_data);
+        fprintf(stderr, "Contents of file \"%s\":\r\n",id);
+        f = fopen(id, "r");
+        { /* Print the contents of the key file */
+            char c;
+            while (!feof(f)) {
+                switch (c=fgetc(f)) {
+                case '\n':
+                case '\r': putc('\r',stderr); putc('\n',stderr); break;
+                default: putc(c, stderr);
+                }
+            }
+        }
+        fprintf(stderr, "File contents printed.\r\n");
+        fclose(f);
+        return NULL;
+    }
+    
+    return pkey;
+}
+
+
+int pem_passwd_cb_fun(char *buf, int size, int rwflag, void *password) 
+{ 
+    int i;
+
+    fprintf(stderr, "In pem_passwd_cb_fun\r\n");
+    if (!password)
+        return 0;
+
+    i = strlen(password);
+    if (i < size) {
+        /* whole pwd (incl terminating 0) fits */
+        fprintf(stderr, "Got FULL pwd %d(%d) chars\r\n", i, size);
+        memcpy(buf, (char*)password, i+1);
+        return i+1;
+    } else {
+        fprintf(stderr, "Got TO LONG pwd %d(%d) chars\r\n", i, size);
+        /* meaningless with a truncated password */
+        return 0;
+    }
+}
diff --git a/lib/crypto/doc/src/Makefile b/lib/crypto/doc/src/Makefile
index 9c503b8fe0..aa987d2b39 100644
--- a/lib/crypto/doc/src/Makefile
+++ b/lib/crypto/doc/src/Makefile
@@ -9,11 +9,11 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-# 
+#
 # The Initial Developer of the Original Code is Ericsson Utvecklings AB.
 # Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
 # AB. All Rights Reserved.''
-# 
+#
 #     $Id$
 #
 include $(ERL_TOP)/make/target.mk
@@ -38,13 +38,13 @@ XML_APPLICATION_FILES = ref_man.xml
 XML_REF3_FILES = crypto.xml
 XML_REF6_FILES = crypto_app.xml
 
-XML_PART_FILES = release_notes.xml usersguide.xml
-XML_CHAPTER_FILES = notes.xml licenses.xml fips.xml
+XML_PART_FILES = usersguide.xml
+XML_CHAPTER_FILES = notes.xml licenses.xml fips.xml engine_load.xml engine_keys.xml
 
 BOOK_FILES = book.xml
 
 XML_FILES = $(BOOK_FILES) $(XML_APPLICATION_FILES) $(XML_REF3_FILES)  $(XML_REF6_FILES) \
-            $(XML_PART_FILES) $(XML_CHAPTER_FILES) 
+            $(XML_PART_FILES) $(XML_CHAPTER_FILES)
 
 GIF_FILES =
 
@@ -63,9 +63,9 @@ HTML_REF_MAN_FILE = $(HTMLDIR)/index.html
 TOP_PDF_FILE = $(PDFDIR)/$(APPLICATION)-$(VSN).pdf
 
 # ----------------------------------------------------
-# FLAGS 
+# FLAGS
 # ----------------------------------------------------
-XML_FLAGS += 
+XML_FLAGS +=
 
 # ----------------------------------------------------
 # Targets
@@ -73,7 +73,6 @@ XML_FLAGS +=
 $(HTMLDIR)/%.gif: %.gif
 	$(INSTALL_DATA) $< $@
 
-
 docs: pdf html man
 
 $(TOP_PDF_FILE): $(XML_FILES)
@@ -86,7 +85,7 @@ man: $(MAN3_FILES) $(MAN6_FILES)
 
 gifs: $(GIF_FILES:%=$(HTMLDIR)/%)
 
-debug opt valgrind: 
+debug opt valgrind:
 
 clean clean_docs clean_tex:
 	rm -rf $(HTMLDIR)/*
@@ -97,7 +96,7 @@ clean clean_docs clean_tex:
 
 # ----------------------------------------------------
 # Release Target
-# ---------------------------------------------------- 
+# ----------------------------------------------------
 include $(ERL_TOP)/make/otp_release_targets.mk
 
 release_docs_spec: docs
@@ -114,4 +113,3 @@ release_docs_spec: docs
 
 
 release_spec:
-
diff --git a/lib/crypto/doc/src/crypto.xml b/lib/crypto/doc/src/crypto.xml
index 8c30d3d50c..3a5efd0bea 100644
--- a/lib/crypto/doc/src/crypto.xml
+++ b/lib/crypto/doc/src/crypto.xml
@@ -11,7 +11,7 @@
       Licensed under the Apache License, Version 2.0 (the "License");
       you may not use this file except in compliance with the License.
       You may obtain a copy of the License at
- 
+
           http://www.apache.org/licenses/LICENSE-2.0
 
       Unless required by applicable law or agreed to in writing, software
@@ -19,7 +19,6 @@
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       See the License for the specific language governing permissions and
       limitations under the License.
-
     </legalnotice>
 
     <title>crypto</title>
@@ -68,11 +67,11 @@
 
  <section>
     <title>DATA TYPES </title>
-    
-    <code>key_value()  = integer() | binary() </code>
+
+    <code>key_value() = integer() | binary() </code>
     <p>Always <c>binary()</c> when used as return value</p>
 
-    <code>rsa_public()  = [key_value()] = [E, N]  </code>
+    <code>rsa_public() = [key_value()] = [E, N]  </code>
     <p> Where E is the public exponent and N is public modulus. </p>
 
     <code>rsa_private() = [key_value()] = [E, N, D] | [E, N, D, P1, P2, E1, E2, C] </code>
@@ -85,7 +84,7 @@
     <code>dss_public() = [key_value()] = [P, Q, G, Y] </code>
     <p>Where P, Q and G are the dss parameters and Y is the public key.</p>
 
-    <code>dss_private() =  [key_value()] = [P, Q, G, X] </code>
+    <code>dss_private() = [key_value()] = [P, Q, G, X] </code>
     <p>Where P, Q and G are the dss parameters and X is the private key.</p>
 
     <code>srp_public() = key_value() </code>
@@ -109,15 +108,16 @@
 
     <code>ecdh_private() = key_value() </code>
 
-    <code>ecdh_params() =  ec_named_curve() | ec_explicit_curve()</code>
+    <code>ecdh_params() = ec_named_curve() | ec_explicit_curve()</code>
 
     <code>ec_explicit_curve() =
-    {ec_field(), Prime :: key_value(), Point :: key_value(), Order :: integer(), CoFactor :: none | integer()} </code>
+    {ec_field(), Prime :: key_value(), Point :: key_value(), Order :: integer(),
+     CoFactor :: none | integer()} </code>
 
     <code>ec_field() = {prime_field, Prime :: integer()} |
     {characteristic_two_field, M :: integer(), Basis :: ec_basis()}</code>
 
-    <code>ec_basis() =  {tpbasis, K :: non_neg_integer()} |
+    <code>ec_basis() = {tpbasis, K :: non_neg_integer()} |
     {ppbasis, K1 :: non_neg_integer(), K2 :: non_neg_integer(), K3 :: non_neg_integer()} |
     onbasis</code>
 
@@ -136,16 +136,34 @@
     See also <seealso marker="#supports-0">crypto:supports/0</seealso>
     </p>
 
+    <marker id="engine_key_ref_type"/>
+    <code>engine_key_ref() = #{engine   := engine_ref(),
+                               key_id   := key_id(),
+                               password => password()}</code>
+
+    <code>engine_ref() = term()</code>
+    <p>The result of a call to <seealso marker="#engine_load-3">engine_load/3</seealso>.
+    </p>
+
+    <code>key_id() = string() | binary()</code>
+    <p>Identifies the key to be used. The format depends on the loaded engine. It is passed to
+    the <c>ENGINE_load_(private|public)_key</c> functions in libcrypto.
+    </p>
+
+    <code>password() = string() | binary()</code>
+    <p>The key's password
+    </p>
+
      <code>stream_cipher() = rc4 | aes_ctr </code>
 
-     <code>block_cipher() =  aes_cbc | aes_cfb8 | aes_cfb128 | aes_ige256 | blowfish_cbc |
+     <code>block_cipher() = aes_cbc | aes_cfb8 | aes_cfb128 | aes_ige256 | blowfish_cbc |
      blowfish_cfb64 | des_cbc | des_cfb | des3_cbc | des3_cfb | des_ede3 | rc2_cbc </code>
 
-     <code>aead_cipher() =  aes_gcm | chacha20_poly1305 </code>
+     <code>aead_cipher() = aes_gcm | chacha20_poly1305 </code>
 
-     <code>stream_key() =  aes_key() | rc4_key() </code>
+     <code>stream_key() = aes_key() | rc4_key() </code>
 
-     <code>block_key() =  aes_key() |  blowfish_key() | des_key()| des3_key() </code>
+     <code>block_key() = aes_key() |  blowfish_key() | des_key()| des3_key() </code>
 
      <code>aes_key() = iodata() </code> <p>Key length is 128, 192 or 256 bits</p>
 
@@ -174,13 +192,17 @@
      Note that both md4 and md5 are recommended only for compatibility with existing applications.
      </p>
      <code> cipher_algorithms() = aes_cbc | aes_cfb8 | aes_cfb128 | aes_ctr | aes_gcm |
-     aes_ige256 | blowfish_cbc | blowfish_cfb64 | chacha20_poly1305 | des_cbc | des_cfb |
-     des3_cbc | des3_cfb | des_ede3 | rc2_cbc | rc4 </code>
-     <code> mac_algorithms() =   hmac | cmac</code>
-     <code> public_key_algorithms() =   rsa |dss | ecdsa | dh | ecdh | ec_gf2m</code>
+     aes_ige256 | blowfish_cbc | blowfish_cfb64 | chacha20_poly1305 | des_cbc |
+     des_cfb | des3_cbc | des3_cfb | des_ede3 | rc2_cbc | rc4 </code>
+     <code> mac_algorithms() = hmac | cmac</code>
+     <code> public_key_algorithms() = rsa |dss | ecdsa | dh | ecdh | ec_gf2m</code>
      <p>Note that ec_gf2m is not strictly a public key algorithm, but a restriction on what curves are supported
      with ecdsa and ecdh.
      </p>
+     <code>engine_method_type() = engine_method_rsa | engine_method_dsa | engine_method_dh |
+     engine_method_rand | engine_method_ecdh | engine_method_ecdsa |
+     engine_method_ciphers | engine_method_digests | engine_method_store |
+     engine_method_pkey_meths | engine_method_pkey_asn1_meths</code>
 
  </section>
 
@@ -261,13 +283,13 @@
 	is not supported by the underlying OpenSSL implementation.</p>
       </desc>
     </func>
-    
+
      <func>
       <name>bytes_to_integer(Bin) -> Integer </name>
       <fsummary>Convert binary representation, of an integer, to an Erlang integer.</fsummary>
       <type>
 	<v>Bin = binary() - as returned by crypto functions</v>
-	
+
         <v>Integer = integer() </v>
       </type>
       <desc>
@@ -439,7 +461,7 @@
       </type>
       <desc>
         <p>Updates the HMAC represented by <c>Context</c> using the given <c>Data</c>. <c>Context</c>
-        must have been generated using an HMAC init function (such as 
+        must have been generated using an HMAC init function (such as
         <seealso marker="#hmac_init-2">hmac_init</seealso>). <c>Data</c> can be any length. <c>NewContext</c>
         must be passed into the next call to <c>hmac_update</c>
 	or to one of the functions <seealso marker="#hmac_final-1">hmac_final</seealso> and
@@ -580,7 +602,7 @@
       <type>
 	<v>Type = rsa</v>
 	<v>CipherText = binary()</v>
-	<v>PrivateKey = rsa_private()</v>
+	<v>PrivateKey = rsa_private() | engine_key_ref()</v>
 	<v>Padding = rsa_pkcs1_padding | rsa_pkcs1_oaep_padding | rsa_no_padding</v>
         <v>PlainText = binary()</v>
       </type>
@@ -594,7 +616,22 @@
 	</p>
       </desc>
     </func>
-    
+
+    <func>
+      <name>privkey_to_pubkey(Type, EnginePrivateKeyRef) -> PublicKey</name>
+      <fsummary>Fetches a public key from an Engine stored private key.</fsummary>
+      <type>
+	<v>Type = rsa | dss</v>
+	<v>EnginePrivateKeyRef = engine_key_ref()</v>
+	<v>PublicKey =  rsa_public() | dss_public()</v>
+      </type>
+      <desc>
+	<p>Fetches the corresponding public key from a private key stored in an Engine.
+	The key must be of the type indicated by the Type parameter.
+	</p>	
+      </desc>
+    </func>
+
     <func>
       <name>private_encrypt(Type, PlainText, PrivateKey, Padding) -> CipherText</name>
       <fsummary>Encrypts PlainText using the private Key.</fsummary>
@@ -605,7 +642,7 @@
 	than <c>byte_size(N)-11</c> if <c>rsa_pkcs1_padding</c> is
 	used, and <c>byte_size(N)</c> if <c>rsa_no_padding</c> is
 	used, where N is public modulus of the RSA key.</d>
-	<v>PrivateKey = rsa_private()</v>
+	<v>PrivateKey = rsa_private() | engine_key_ref()</v>
 	<v>Padding = rsa_pkcs1_padding | rsa_no_padding</v>
         <v>CipherText = binary()</v>
       </type>
@@ -624,7 +661,7 @@
       <type>
 	<v>Type = rsa</v>
 	<v>CipherText = binary()</v>
-	<v>PublicKey =  rsa_public() </v>
+	<v>PublicKey =  rsa_public() | engine_key_ref()</v>
 	<v>Padding = rsa_pkcs1_padding | rsa_no_padding</v>
         <v>PlainText = binary()</v>
       </type>
@@ -649,7 +686,7 @@
 	than <c>byte_size(N)-11</c> if <c>rsa_pkcs1_padding</c> is
 	used, and <c>byte_size(N)</c> if <c>rsa_no_padding</c> is
 	used, where N is public modulus of the RSA key.</d>
-	<v>PublicKey = rsa_public()</v>
+	<v>PublicKey = rsa_public() | engine_key_ref()</v>
 	<v>Padding = rsa_pkcs1_padding | rsa_pkcs1_oaep_padding | rsa_no_padding</v>
         <v>CipherText = binary()</v>
       </type>
@@ -702,7 +739,7 @@
 	signed or it is the hashed value of "cleartext" i.e. the
 	digest (plaintext).</d>
 	<v>DigestType = rsa_digest_type() | dss_digest_type() | ecdsa_digest_type()</v>
-	<v>Key = rsa_private() | dss_private() | [ecdh_private(),ecdh_params()]</v>
+	<v>Key = rsa_private() | dss_private() | [ecdh_private(),ecdh_params()] | engine_key_ref()</v>
 	<v>Options = sign_options()</v>
       </type>
       <desc>
@@ -1014,7 +1051,7 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
         or it is the hashed value of "cleartext" i.e. the digest (plaintext).</d>
 	<v>DigestType = rsa_digest_type() | dss_digest_type() | ecdsa_digest_type()</v>
 	<v>Signature = binary()</v>
-	<v>Key = rsa_public() | dss_public() | [ecdh_public(),ecdh_params()]</v>
+	<v>Key = rsa_public() | dss_public() | [ecdh_public(),ecdh_params()] | engine_key_ref()</v>
 	<v>Options = sign_options()</v>
       </type>
       <desc>
@@ -1026,6 +1063,175 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
       </desc>
     </func>
 
+    <!-- Engine functions -->
+    <func>
+      <name>engine_get_all_methods() -> Result</name>
+      <fsummary>Return list of all possible engine methods</fsummary>
+      <type>
+	<v>Result = [EngineMethod::atom()]</v>
+      </type>
+      <desc>
+	<p>
+	  Returns a list of all possible engine methods.
+	</p>
+	<p>	  
+	  May throw exception notsup in case there is 
+	  no engine support in the underlying OpenSSL implementation.
+	</p>
+	<p>
+	  See also the chapter <seealso marker="crypto:engine_load#engine_load">Engine Load</seealso>
+	  in the User's Guide.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name>engine_load(EngineId, PreCmds, PostCmds) -> Result</name>
+      <fsummary>Dynamical load an encryption engine</fsummary>
+      <type>
+	<v>EngineId = unicode:chardata()</v>
+	<v>PreCmds, PostCmds = [{unicode:chardata(), unicode:chardata()}]</v>
+	<v>Result = {ok, Engine::term()} | {error, Reason::term()}</v>
+      </type>
+      <desc>
+	<p>
+	  Loads the OpenSSL engine given by <c>EngineId</c> if it is available and then returns ok and
+	  an engine handle. This function is the same as calling <c>engine_load/4</c> with 
+	  <c>EngineMethods</c> set to a list of all the possible methods.  An error tuple is 
+	  returned if the engine can't be loaded.
+	</p>
+	<p>
+	  The function throws a badarg if the parameters are in wrong format.
+	  It may also throw the exception notsup in case there is 
+	  no engine support in the underlying OpenSSL implementation.
+	</p>
+	<p>
+	  See also the chapter <seealso marker="crypto:engine_load#engine_load">Engine Load</seealso>
+	  in the User's Guide.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name>engine_load(EngineId, PreCmds, PostCmds, EngineMethods) -> Result</name>
+      <fsummary>Dynamical load an encryption engine</fsummary>
+      <type>
+	<v>EngineId = unicode:chardata()</v>
+	<v>PreCmds, PostCmds = [{unicode:chardata(), unicode:chardata()}]</v>
+	<v>EngineMethods = [engine_method_type()]</v>
+	<v>Result = {ok, Engine::term()} | {error, Reason::term()}</v>
+      </type>
+      <desc>
+	<p>
+	  Loads the OpenSSL engine given by <c>EngineId</c> if it is available and then returns ok and
+	  an engine handle. An error tuple is returned if the engine can't be loaded.
+	</p>
+	<p>
+	  The function throws a badarg if the parameters are in wrong format.
+	  It may also throw the exception notsup in case there is 
+	  no engine support in the underlying OpenSSL implementation.
+	</p>
+	<p>
+	  See also the chapter <seealso marker="crypto:engine_load#engine_load">Engine Load</seealso>
+	  in the User's Guide.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name>engine_unload(Engine) -> Result</name>
+      <fsummary>Dynamical load an encryption engine</fsummary>
+      <type>
+	<v>Engine = term()</v>
+	<v>Result = ok | {error, Reason::term()}</v>
+      </type>
+      <desc>
+	<p>
+	  Unloads the OpenSSL engine given by <c>EngineId</c>.
+	  An error tuple is returned if the engine can't be unloaded.
+	</p>
+	<p>
+	  The function throws a badarg if the parameter is in wrong format.
+	  It may also throw the exception notsup in case there is 
+	  no engine support in the underlying OpenSSL implementation.
+	</p>
+	<p>
+	  See also the chapter <seealso marker="crypto:engine_load#engine_load">Engine Load</seealso>
+	  in the User's Guide.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name>engine_list() -> Result</name>
+      <fsummary>List the known engine ids</fsummary>
+      <type>
+	<v>Result = [EngineId::unicode:chardata()]</v>
+      </type>
+      <desc>
+	<p>List the id's of all engines in OpenSSL's internal list.</p>
+	<p>
+	  It may also throw the exception notsup in case there is 
+	  no engine support in the underlying OpenSSL implementation.
+	</p>
+	<p>
+	  See also the chapter <seealso marker="crypto:engine_load#engine_load">Engine Load</seealso> 
+	  in the User's Guide.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name>engine_ctrl_cmd_string(Engine, CmdName, CmdArg) -> Result</name>
+      <fsummary>Sends ctrl commands to an OpenSSL engine</fsummary>
+      <type>
+	<v>Engine = term()</v>
+	<v>CmdName = unicode:chardata()</v>
+	<v>CmdArg = unicode:chardata()</v>
+	<v>Result = ok | {error, Reason::term()}</v>
+      </type>
+      <desc>
+	<p>
+	  Sends ctrl commands to the OpenSSL engine given by <c>Engine</c>.
+	  This function is the same as calling <c>engine_ctrl_cmd_string/4</c> with 
+	  <c>Optional</c> set to <c>false</c>.
+	</p>
+	<p>
+	  The function throws a badarg if the parameters are in wrong format.
+	  It may also throw the exception notsup in case there is 
+	  no engine support in the underlying OpenSSL implementation.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name>engine_ctrl_cmd_string(Engine, CmdName, CmdArg, Optional) -> Result</name>
+      <fsummary>Sends ctrl commands to an OpenSSL engine</fsummary>
+      <type>
+	<v>Engine = term()</v>
+	<v>CmdName = unicode:chardata()</v>
+	<v>CmdArg = unicode:chardata()</v>
+	<v>Optional = boolean()</v>
+	<v>Result = ok | {error, Reason::term()}</v>
+      </type>
+      <desc>
+	<p>
+	  Sends ctrl commands to the OpenSSL engine given by <c>Engine</c>.
+	  <c>Optional</c> is a boolean argument that can relax the semantics of the function. 
+	  If set to <c>true</c> it will only return failure if the ENGINE supported the given 
+	  command name but failed while executing it, if the ENGINE doesn't support the command 
+	  name it will simply return success without doing anything. In this case we assume 
+	  the user is only supplying commands specific to the given ENGINE so we set this to
+	  <c>false</c>.
+	</p>
+	<p>
+	  The function throws a badarg if the parameters are in wrong format.
+	  It may also throw the exception notsup in case there is 
+	  no engine support in the underlying OpenSSL implementation.
+	</p>
+      </desc>
+    </func>
+
  </funcs>
 
   <!-- Maybe put this in the users guide -->
@@ -1100,4 +1306,3 @@ _FloatValue = rand:uniform().     % [0.0; 1.0[</pre>
   <!--   </p> -->
   <!-- </section> -->
 </erlref>
-
diff --git a/lib/crypto/doc/src/engine_keys.xml b/lib/crypto/doc/src/engine_keys.xml
new file mode 100644
index 0000000000..38714fed8a
--- /dev/null
+++ b/lib/crypto/doc/src/engine_keys.xml
@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE chapter SYSTEM "chapter.dtd">
+
+<chapter>
+  <header>
+    <copyright>
+      <year>2017</year><year>2017</year>
+      <holder>Ericsson AB. All Rights Reserved.</holder>
+    </copyright>
+    <legalnotice>
+      The contents of this file are subject to the Erlang Public License,
+      Version 1.1, (the "License"); you may not use this file except in
+      compliance with the License. You should have received a copy of the
+      Erlang Public License along with this software. If not, it can be
+      retrieved online at http://www.erlang.org/.
+
+      Software distributed under the License is distributed on an "AS IS"
+      basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+      the License for the specific language governing rights and limitations
+      under the License.
+    </legalnotice>
+    <title>Engine Stored Keys</title>
+    <prepared>Hans Nilsson</prepared>
+    <date>2017-11-10</date>
+    <file>engine_keys.xml</file>
+  </header>
+  <p>
+    <marker id="engine_key"></marker>
+    This chapter describes the support in the crypto application for using public and private keys stored in encryption engines.
+  </p>
+
+  <section>
+    <title>Background</title>
+    <p>
+      <url href="https://www.openssl.org/">OpenSSL</url> exposes an Engine API, which makes 
+      it possible to plug in alternative implementations for some of the cryptographic
+      operations implemented by OpenSSL.
+      See the chapter <seealso marker="crypto:engine_load#engine_load">Engine Load</seealso>
+      for details and how to load an Engine.
+    </p>
+    <p>
+      An engine could among other tasks provide a storage for
+      private or public keys. Such a storage could be made safer than the normal file system. Thoose techniques are not 
+      described in this User's Guide.  Here we concentrate on how to use private or public keys stored in
+      such an engine.
+    </p>
+    <p>
+      The storage engine must call <c>ENGINE_set_load_privkey_function</c> and <c>ENGINE_set_load_pubkey_function</c>.
+      See the OpenSSL cryptolib's <url href="https://www.openssl.org/docs/manpages.html">manpages</url>.
+    </p>
+    <p>
+      OTP/Crypto requires that the user provides two or three items of information about the key. The application used
+      by the user is usually on a higher level, for example in
+      <seealso marker="ssl:ssl#key_option_def">SSL</seealso>. If using
+      the crypto application directly, it is required that:
+    </p>
+    <list>
+      <item>an Engine is loaded, see the chapter on <seealso marker="crypto:engine_load#engine_load">Engine Load</seealso>
+      or the <seealso marker="crypto:crypto#engine_load-3">Reference Manual</seealso>
+      </item>
+      <item>a reference to a key in the Engine is available. This should be an Erlang string or binary and depends
+      on the Engine loaded
+      </item>
+      <item>an Erlang map is constructed with the Engine reference, the key reference and possibly a key passphrase if
+      needed by the Engine. See the <seealso marker="crypto:crypto#engine_key_ref_type">Reference Manual</seealso> for
+      details of the map.
+      </item>
+    </list>
+  </section>
+
+  <section>
+    <title>Use Cases</title>
+    <section>
+      <title>Sign with an engine stored private key</title>
+      <p>
+	This example shows how to construct a key reference that is used in a sign operation.
+	The actual key is stored in the engine that is loaded at prompt 1.
+      </p>
+      <code>
+1> {ok, EngineRef} = crypto:engine_load(....).
+...
+{ok,#Ref&lt;0.2399045421.3028942852.173962>}
+2> PrivKey = #{engine => EngineRef,
+               key_id => "id of the private key in Engine"}.
+...
+3> Signature = crypto:sign(rsa, sha, &lt;&lt;"The message">>, PrivKey).
+&lt;&lt;65,6,125,254,54,233,84,77,83,63,168,28,169,214,121,76,
+  207,177,124,183,156,185,160,243,36,79,125,230,231,...>>
+      </code>
+    </section>
+
+    <section>
+      <title>Verify with an engine stored public key</title>
+      <p>
+	Here the signature and message in the last example is verifyed using the public key.
+	The public key is stored in an engine, only to exemplify that it is possible. The public
+	key could of course be handled openly as usual.
+      </p>
+      <code>
+4> PublicKey = #{engine => EngineRef,
+                 key_id => "id of the public key in Engine"}.
+...
+5> crypto:verify(rsa, sha, &lt;&lt;"The message">>, Signature, PublicKey).
+true
+6> 
+      </code>
+    </section>
+
+    <section>
+      <title>Using a password protected private key</title>
+      <p>
+	The same example as the first sign example, except that a password protects the key down in the Engine.
+      </p>
+      <code>
+6> PrivKeyPwd = #{engine => EngineRef,
+                  key_id => "id of the pwd protected private key in Engine",
+		  password => "password"}.
+...
+7> crypto:sign(rsa, sha, &lt;&lt;"The message">>, PrivKeyPwd).
+&lt;&lt;140,80,168,101,234,211,146,183,231,190,160,82,85,163,
+  175,106,77,241,141,120,72,149,181,181,194,154,175,76,
+  223,...>>
+8> 
+      </code>
+
+    </section>
+
+  </section>
+</chapter>
diff --git a/lib/crypto/doc/src/engine_load.xml b/lib/crypto/doc/src/engine_load.xml
new file mode 100644
index 0000000000..e5c3f5d561
--- /dev/null
+++ b/lib/crypto/doc/src/engine_load.xml
@@ -0,0 +1,110 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE chapter SYSTEM "chapter.dtd">
+
+<chapter>
+  <header>
+    <copyright>
+      <year>2017</year><year>2017</year>
+      <holder>Ericsson AB. All Rights Reserved.</holder>
+    </copyright>
+    <legalnotice>
+      The contents of this file are subject to the Erlang Public License,
+      Version 1.1, (the "License"); you may not use this file except in
+      compliance with the License. You should have received a copy of the
+      Erlang Public License along with this software. If not, it can be
+      retrieved online at http://www.erlang.org/.
+
+      Software distributed under the License is distributed on an "AS IS"
+      basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+      the License for the specific language governing rights and limitations
+      under the License.
+    </legalnotice>
+    <title>Engine Load</title>
+    <prepared>Lars Thorsén</prepared>
+    <date>2017-08-22</date>
+    <file>engine_load.xml</file>
+  </header>
+  <p>
+    <marker id="engine_load"></marker>
+    This chapter describes the support for loading encryption engines in the crypto application.
+  </p>
+
+  <section>
+    <title>Background</title>
+    <p>
+      OpenSSL exposes an Engine API, which makes it possible to plug in alternative
+      implementations for some or all of the cryptographic operations implemented by OpenSSL.
+      When configured appropriately, OpenSSL calls the engine's implementation of these
+      operations instead of its own.
+    </p>
+    <p>
+      Typically, OpenSSL engines provide a hardware implementation of specific cryptographic
+      operations. The hardware implementation usually offers improved performance over its
+      software-based counterpart, which is known as cryptographic acceleration.
+    </p>
+  </section>
+
+  <section>
+    <title>Use Cases</title>
+    <section>
+      <title>Dynamically load an engine from default directory</title>
+      <p>
+	If the engine is located in the OpenSSL/LibreSSL installation <c>engines</c> directory.
+      </p>
+      <code>
+1> {ok, Engine} = crypto:engine_load(&lt;&lt;"otp_test_engine">>, [], []).
+ {ok, #Ref}</code>
+       <note>
+	<p>The file name requirement on the engine dynamic library can differ between SSL versions.</p>
+      </note>
+    </section>
+
+    <section>
+      <title>Load an engine with the dynamic engine</title>
+      <p>
+	Load an engine with the help of the dynamic engine by giving the path to the library.
+      </p>
+      <code>
+ 2> {ok, Engine} = crypto:engine_load(&lt;&lt;"dynamic">>,
+                                      [{&lt;&lt;"SO_PATH">>,
+                                        &lt;&lt;"/some/path/otp_test_engine.so">>},
+                                       {&lt;&lt;"ID">>, &lt;&lt;"MD5">>},
+                                       &lt;&lt;"LOAD">>],
+                                      []).
+ {ok, #Ref}</code>
+      <note>
+	<p>The dynamic engine is not supported in LibreSSL from version 2.2.1</p>
+      </note>
+    </section>
+
+    <section>
+      <title>Load an engine and replace some methods</title>
+      <p>
+	Load an engine with the help of the dynamic engine and just
+	replace some engine methods.
+      </p>
+      <code>
+ 3> Methods = crypto:engine_get_all_methods() -- [engine_method_dh,engine_method_rand,
+engine_method_ciphers,engine_method_digests, engine_method_store,
+engine_method_pkey_meths, engine_method_pkey_asn1_meths].
+[engine_method_rsa,engine_method_dsa,
+ engine_method_ecdh,engine_method_ecdsa]
+ 4> {ok, Engine} = crypto:engine_load(&lt;&lt;"dynamic">>,
+                                      [{&lt;&lt;"SO_PATH">>,
+                                        &lt;&lt;"/some/path/otp_test_engine.so">>},
+                                       {&lt;&lt;"ID">>, &lt;&lt;"MD5">>},
+                                       &lt;&lt;"LOAD">>],
+                                      [],
+		                      Methods).
+ {ok, #Ref}</code>
+    </section>
+
+    <section>
+      <title>List all engines currently loaded</title>
+      <code>
+ 5> crypto:engine_list().
+[&lt;&lt;"dynamic">>, &lt;&lt;"MD5">>]</code>
+    </section>
+
+  </section>
+</chapter>
diff --git a/lib/crypto/doc/src/notes.xml b/lib/crypto/doc/src/notes.xml
index 9376e6f649..1f788a4e35 100644
--- a/lib/crypto/doc/src/notes.xml
+++ b/lib/crypto/doc/src/notes.xml
@@ -31,6 +31,92 @@
   </header>
   <p>This document describes the changes made to the Crypto application.</p>
 
+<section><title>Crypto 4.2.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix build error caused by removed RSA padding functions
+	    in LibreSSL >= 2.6.1</p>
+          <p>
+	    Own Id: OTP-14873</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Crypto 4.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    The compatibility function <c>void HMAC_CTX_free</c> in
+	    <c>crypto.c</c> erroneously tried to return a value.</p>
+          <p>
+	    Own Id: OTP-14720</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Rewrite public and private key encode/decode with EVP
+	    api. New RSA padding options added. This is a modified
+	    half of PR-838.</p>
+          <p>
+	    Own Id: OTP-14446</p>
+        </item>
+        <item>
+          <p>
+	    The crypto API is extended to use private/public keys
+	    stored in an Engine for sign/verify or encrypt/decrypt
+	    operations.</p>
+          <p>
+	    The ssl application provides an API to use this new
+	    engine concept in TLS.</p>
+          <p>
+	    Own Id: OTP-14448</p>
+        </item>
+        <item>
+	    <p> Add support to plug in alternative implementations
+	    for some or all of the cryptographic operations supported
+	    by the OpenSSL Engine API. When configured appropriately,
+	    OpenSSL calls the engine's implementation of these
+	    operations instead of its own. </p>
+          <p>
+	    Own Id: OTP-14567</p>
+        </item>
+        <item>
+          <p>
+	    Replaced a call of the OpenSSL deprecated function
+	    <c>DH_generate_parameters</c> in <c>crypto.c</c>.</p>
+          <p>
+	    Own Id: OTP-14639</p>
+        </item>
+        <item>
+          <p>
+	    Documentation added about how to use keys stored in an
+	    Engine.</p>
+          <p>
+	    Own Id: OTP-14735 Aux Id: OTP-14448 </p>
+        </item>
+        <item>
+	    <p> Add engine_ ctrl_cmd_string/3,4 the OpenSSL Engine
+	    support in crypto. </p>
+          <p>
+	    Own Id: OTP-14801</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Crypto 4.1</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/crypto/doc/src/usersguide.xml b/lib/crypto/doc/src/usersguide.xml
index 7971aefff4..e2ba1fe160 100644
--- a/lib/crypto/doc/src/usersguide.xml
+++ b/lib/crypto/doc/src/usersguide.xml
@@ -11,7 +11,7 @@
       Licensed under the Apache License, Version 2.0 (the "License");
       you may not use this file except in compliance with the License.
       You may obtain a copy of the License at
- 
+
           http://www.apache.org/licenses/LICENSE-2.0
 
       Unless required by applicable law or agreed to in writing, software
@@ -19,7 +19,7 @@
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       See the License for the specific language governing permissions and
       limitations under the License.
-    
+
     </legalnotice>
 
     <title>Crypto User's Guide</title>
@@ -48,5 +48,6 @@
   </description>
   <xi:include href="licenses.xml"/>
   <xi:include href="fips.xml"/>
+  <xi:include href="engine_load.xml"/>
+  <xi:include href="engine_keys.xml"/>
 </part>
-
diff --git a/lib/crypto/src/Makefile b/lib/crypto/src/Makefile
index aea8a5a71c..edad0e6b61 100644
--- a/lib/crypto/src/Makefile
+++ b/lib/crypto/src/Makefile
@@ -39,8 +39,7 @@ MODULES= \
 	crypto \
 	crypto_ec_curves
 
-HRL_FILES= 
-
+HRL_FILES=
 ERL_FILES= $(MODULES:%=%.erl)
 
 TARGET_FILES= $(MODULES:%=$(EBIN)/%.$(EMULATOR))
@@ -56,16 +55,16 @@ APPUP_TARGET= $(EBIN)/$(APPUP_FILE)
 # ----------------------------------------------------
 # FLAGS
 # ----------------------------------------------------
-ERL_COMPILE_FLAGS += -DCRYPTO_VSN=\"$(VSN)\" -Werror
+ERL_COMPILE_FLAGS += -DCRYPTO_VSN=\"$(VSN)\" -Werror -I../include
 
 # ----------------------------------------------------
 # Targets
 # ----------------------------------------------------
 
-debug opt valgrind: $(TARGET_FILES) $(APP_TARGET) $(APPUP_TARGET) 
+debug opt valgrind: $(TARGET_FILES) $(APP_TARGET) $(APPUP_TARGET)
 
 clean:
-	rm -f $(TARGET_FILES) $(APP_TARGET) $(APPUP_TARGET) 
+	rm -f $(TARGET_FILES) $(APP_TARGET) $(APPUP_TARGET)
 	rm -f errs core *~
 
 $(APP_TARGET): $(APP_SRC) ../vsn.mk
@@ -78,7 +77,7 @@ docs:
 
 # ----------------------------------------------------
 # Release Target
-# ---------------------------------------------------- 
+# ----------------------------------------------------
 include $(ERL_TOP)/make/otp_release_targets.mk
 
 release_spec: opt
@@ -89,10 +88,3 @@ release_spec: opt
 		$(APPUP_TARGET) "$(RELSYSDIR)/ebin"
 
 release_docs_spec:
-
-
-
-
-
-
-
diff --git a/lib/crypto/src/crypto.erl b/lib/crypto/src/crypto.erl
index 6b4f3a256d..46775989ae 100644
--- a/lib/crypto/src/crypto.erl
+++ b/lib/crypto/src/crypto.erl
@@ -42,13 +42,28 @@
 -export([stream_init/2, stream_init/3, stream_encrypt/2, stream_decrypt/2]).
 -export([public_encrypt/4, private_decrypt/4]).
 -export([private_encrypt/4, public_decrypt/4]).
--export([dh_generate_parameters/2, dh_check/1]). %% Testing see
+-export([privkey_to_pubkey/2]).
 -export([ec_curve/1, ec_curves/0]).
 -export([rand_seed/1]).
+%% Engine
+-export([
+         engine_get_all_methods/0,
+         engine_load/3,
+         engine_load/4,
+         engine_unload/1,
+         engine_list/0,
+         engine_ctrl_cmd_string/3,
+         engine_ctrl_cmd_string/4
+        ]).
+
+-export_type([engine_ref/0,
+              key_id/0,
+              password/0
+             ]).
 
-%% Private. For tests.
--export([packed_openssl_version/4]).
 
+%% Private. For tests.
+-export([packed_openssl_version/4, engine_methods_convert_to_bitmask/2, get_test_engine/0]).
 
 -deprecated({rand_uniform, 2, next_major_release}).
 
@@ -460,13 +475,24 @@ sign(Algorithm, Type, Data, Key, Options) ->
     end.
 
 
+
+-type key_id()   :: string() | binary() .
+-type password() :: string() | binary() .
+
+-type engine_key_ref() :: #{engine :=   engine_ref(),
+                            key_id :=   key_id(),
+                            password => password(),
+                            term() => term() 
+                           }.
+
 -type pk_algs() :: rsa | ecdsa | dss .
--type pk_opt() :: list() | rsa_padding() .
+-type pk_key()  :: engine_key_ref() | [integer() | binary()] .
+-type pk_opt()  :: list() | rsa_padding() .
 
--spec public_encrypt(pk_algs(),  binary(), [binary()],             pk_opt()) -> binary().
--spec public_decrypt(pk_algs(),  binary(), [integer() | binary()], pk_opt()) -> binary().
--spec private_encrypt(pk_algs(), binary(), [integer() | binary()], pk_opt()) -> binary().
--spec private_decrypt(pk_algs(), binary(), [integer() | binary()], pk_opt()) -> binary().
+-spec public_encrypt(pk_algs(),  binary(), pk_key(), pk_opt()) -> binary().
+-spec public_decrypt(pk_algs(),  binary(), pk_key(), pk_opt()) -> binary().
+-spec private_encrypt(pk_algs(), binary(), pk_key(), pk_opt()) -> binary().
+-spec private_decrypt(pk_algs(), binary(), pk_key(), pk_opt()) -> binary().
 
 public_encrypt(Algorithm, In, Key, Options) when is_list(Options) ->
     case pkey_crypt_nif(Algorithm, In, format_pkey(Algorithm, Key), Options, false, true) of
@@ -607,10 +633,174 @@ compute_key(ecdh, Others, My, Curve) ->
 			 nif_curve_params(Curve),
 			 ensure_int_as_bin(My)).
 
+%%======================================================================
+%% Engine functions
+%%======================================================================
+%%----------------------------------------------------------------------
+%% Function: engine_get_all_methods/0
+%%----------------------------------------------------------------------
+-type engine_method_type() :: engine_method_rsa | engine_method_dsa | engine_method_dh |
+                              engine_method_rand | engine_method_ecdh | engine_method_ecdsa |
+                              engine_method_ciphers | engine_method_digests | engine_method_store |
+                              engine_method_pkey_meths | engine_method_pkey_asn1_meths | 
+                              engine_method_ec.
+
+-type engine_ref() :: term().
+
+-spec engine_get_all_methods() ->
+    [engine_method_type()].
+engine_get_all_methods() ->
+     notsup_to_error(engine_get_all_methods_nif()).
+
+%%----------------------------------------------------------------------
+%% Function: engine_load/3
+%%----------------------------------------------------------------------
+-spec engine_load(EngineId::unicode:chardata(),
+                  PreCmds::[{unicode:chardata(), unicode:chardata()}],
+                  PostCmds::[{unicode:chardata(), unicode:chardata()}]) ->
+    {ok, Engine::engine_ref()} | {error, Reason::term()}.
+engine_load(EngineId, PreCmds, PostCmds) when is_list(PreCmds), is_list(PostCmds) ->
+    engine_load(EngineId, PreCmds, PostCmds, engine_get_all_methods()).
+
+%%----------------------------------------------------------------------
+%% Function: engine_load/4
+%%----------------------------------------------------------------------
+-spec engine_load(EngineId::unicode:chardata(),
+                  PreCmds::[{unicode:chardata(), unicode:chardata()}],
+                  PostCmds::[{unicode:chardata(), unicode:chardata()}],
+                  EngineMethods::[engine_method_type()]) ->
+    {ok, Engine::term()} | {error, Reason::term()}.
+engine_load(EngineId, PreCmds, PostCmds, EngineMethods) when is_list(PreCmds),
+                                                             is_list(PostCmds) ->
+    try
+        ok = notsup_to_error(engine_load_dynamic_nif()),
+        case notsup_to_error(engine_by_id_nif(ensure_bin_chardata(EngineId))) of
+            {ok, Engine} ->
+                ok = engine_load_1(Engine, PreCmds, PostCmds, EngineMethods),
+                {ok, Engine};
+            {error, Error1} ->
+                {error, Error1}
+        end
+    catch
+       throw:Error2 ->
+          Error2
+    end.
+
+engine_load_1(Engine, PreCmds, PostCmds, EngineMethods) ->
+    try
+        ok = engine_nif_wrapper(engine_ctrl_cmd_strings_nif(Engine, ensure_bin_cmds(PreCmds), 0)),
+        ok = engine_nif_wrapper(engine_add_nif(Engine)),
+        ok = engine_nif_wrapper(engine_init_nif(Engine)),
+        engine_load_2(Engine, PostCmds, EngineMethods),
+        ok
+    catch
+       throw:Error ->
+          %% The engine couldn't initialise, release the structural reference
+          ok = engine_free_nif(Engine),
+          throw(Error)
+    end.
+
+engine_load_2(Engine, PostCmds, EngineMethods) ->
+    try
+        ok = engine_nif_wrapper(engine_ctrl_cmd_strings_nif(Engine, ensure_bin_cmds(PostCmds), 0)),
+        [ok = engine_nif_wrapper(engine_register_nif(Engine, engine_method_atom_to_int(Method))) ||
+            Method <- EngineMethods],
+        ok
+    catch
+       throw:Error ->
+          %% The engine registration failed, release the functional reference
+          ok = engine_finish_nif(Engine),
+          throw(Error)
+    end.
+
+%%----------------------------------------------------------------------
+%% Function: engine_unload/1
+%%----------------------------------------------------------------------
+-spec engine_unload(Engine::term()) ->
+    ok | {error, Reason::term()}.
+engine_unload(Engine) ->
+    engine_unload(Engine, engine_get_all_methods()).
+
+-spec engine_unload(Engine::term(), EngineMethods::[engine_method_type()]) ->
+    ok | {error, Reason::term()}.
+engine_unload(Engine, EngineMethods) ->
+    try
+        [ok = engine_nif_wrapper(engine_unregister_nif(Engine, engine_method_atom_to_int(Method))) ||
+            Method <- EngineMethods],
+        ok = engine_nif_wrapper(engine_remove_nif(Engine)),
+        %% Release the functional reference from engine_init_nif
+        ok = engine_nif_wrapper(engine_finish_nif(Engine)),
+        %% Release the structural reference from engine_by_id_nif
+        ok = engine_nif_wrapper(engine_free_nif(Engine))
+    catch
+       throw:Error ->
+          Error
+    end.
+
+%%----------------------------------------------------------------------
+%% Function: engine_list/0
+%%----------------------------------------------------------------------
+-spec engine_list() ->
+    [EngineId::binary()].
+engine_list() ->
+    case notsup_to_error(engine_get_first_nif()) of
+        {ok, <<>>} ->
+            [];
+        {ok, Engine} ->
+            case notsup_to_error(engine_get_id_nif(Engine)) of
+                {ok, <<>>} ->
+                    engine_list(Engine, []);
+                {ok, EngineId} ->
+                    engine_list(Engine, [EngineId])
+            end
+    end.
+
+engine_list(Engine0, IdList) ->
+    case notsup_to_error(engine_get_next_nif(Engine0)) of
+        {ok, <<>>} ->
+            lists:reverse(IdList);
+        {ok, Engine1} ->
+            case notsup_to_error(engine_get_id_nif(Engine1)) of
+                {ok, <<>>} ->
+                    engine_list(Engine1, IdList);
+                {ok, EngineId} ->
+                    engine_list(Engine1, [EngineId |IdList])
+            end
+    end.
+
+%%----------------------------------------------------------------------
+%% Function: engine_ctrl_cmd_string/3
+%%----------------------------------------------------------------------
+-spec engine_ctrl_cmd_string(Engine::term(),
+                      CmdName::unicode:chardata(), 
+                      CmdArg::unicode:chardata()) ->
+    ok | {error, Reason::term()}.
+engine_ctrl_cmd_string(Engine, CmdName, CmdArg) ->
+    engine_ctrl_cmd_string(Engine, CmdName, CmdArg, false).
+
+%%----------------------------------------------------------------------
+%% Function: engine_ctrl_cmd_string/4
+%%----------------------------------------------------------------------
+-spec engine_ctrl_cmd_string(Engine::term(),
+                      CmdName::unicode:chardata(), 
+                      CmdArg::unicode:chardata(),
+                      Optional::boolean()) ->
+    ok | {error, Reason::term()}.
+engine_ctrl_cmd_string(Engine, CmdName, CmdArg, Optional) ->
+    case engine_ctrl_cmd_strings_nif(Engine, 
+                                     ensure_bin_cmds([{CmdName, CmdArg}]), 
+                                     bool_to_int(Optional)) of
+        ok ->
+            ok;
+        notsup ->
+            erlang:error(notsup);
+        {error, Error} ->
+            {error, Error}
+    end.
+
 %%--------------------------------------------------------------------
 %%% On load
 %%--------------------------------------------------------------------
-
 on_load() ->
     LibBaseName = "crypto",
     PrivDir = code:priv_dir(crypto),
@@ -657,8 +847,13 @@ on_load() ->
     case Status of
 	ok -> ok;
 	{error, {E, Str}} ->
-	    error_logger:error_msg("Unable to load crypto library. Failed with error:~n\"~p, ~s\"~n"
-				   "OpenSSL might not be installed on this system.~n",[E,Str]),
+            Fmt = "Unable to load crypto library. Failed with error:~n\"~p, ~s\"~n~s",
+            Extra = case E of
+                        load_failed ->
+                            "OpenSSL might not be installed on this system.\n";
+                        _ -> ""
+                    end,
+	    error_logger:error_msg(Fmt, [E,Str,Extra]),
 	    Status
     end.
 
@@ -670,12 +865,12 @@ path2bin(Path) when is_list(Path) ->
     end.
 
 %%--------------------------------------------------------------------
-%%% Internal functions 
+%%% Internal functions
 %%--------------------------------------------------------------------
 max_bytes() ->
     ?MAX_BYTES_TO_NIF.
 
-notsup_to_error(notsup) ->
+notsup_to_error(notsup) -> 
     erlang:error(notsup);
 notsup_to_error(Other) ->
     Other.
@@ -799,7 +994,7 @@ do_stream_decrypt({rc4, State0}, Data) ->
 
 
 %%
-%% AES - in counter mode (CTR) with state maintained for multi-call streaming 
+%% AES - in counter mode (CTR) with state maintained for multi-call streaming
 %%
 -type ctr_state() :: { iodata(), binary(), binary(), integer() } | binary().
 
@@ -808,11 +1003,11 @@ do_stream_decrypt({rc4, State0}, Data) ->
 				 { ctr_state(), binary() }.
 -spec aes_ctr_stream_decrypt(ctr_state(), binary()) ->
 				 { ctr_state(), binary() }.
- 
+
 aes_ctr_stream_init(_Key, _IVec) -> ?nif_stub.
 aes_ctr_stream_encrypt(_State, _Data) -> ?nif_stub.
 aes_ctr_stream_decrypt(_State, _Cipher) -> ?nif_stub.
-     
+
 %%
 %% RC4 - symmetric stream cipher
 %%
@@ -897,28 +1092,7 @@ pkey_verify_nif(_Algorithm, _Type, _Data, _Signature, _Key, _Options) -> ?nif_st
 rsa_generate_key_nif(_Bits, _Exp) -> ?nif_stub.
 
 %% DH Diffie-Hellman functions
-%% 
-
-%% Generate (and check) Parameters is not documented because they are implemented
-%% for testing (and offline parameter generation) only.
-%% From the openssl doc: 
-%%  DH_generate_parameters() may run for several hours before finding a suitable prime.
-%% Thus dh_generate_parameters may in this implementation block 
-%% the emulator for several hours.
 %%
-%% usage: dh_generate_parameters(1024, 2 or 5) -> 
-%%    [Prime=mpint(), SharedGenerator=mpint()]
-dh_generate_parameters(PrimeLen, Generator) ->
-    case dh_generate_parameters_nif(PrimeLen, Generator) of
-	error -> erlang:error(generation_failed, [PrimeLen,Generator]);
-	Ret -> Ret
-    end.  
-
-dh_generate_parameters_nif(_PrimeLen, _Generator) -> ?nif_stub.
-
-%% Checks that the DHParameters are ok.
-%% DHParameters = [P (Prime)= mpint(), G(Generator) = mpint()]
-dh_check([_Prime,_Gen]) -> ?nif_stub.
 
 %% DHParameters = [P (Prime)= mpint(), G(Generator) = mpint()]
 %% PrivKey = mpint()
@@ -938,6 +1112,24 @@ ec_curves() ->
 ec_curve(X) ->
     crypto_ec_curves:curve(X).
 
+
+privkey_to_pubkey(Alg, EngineMap) when Alg == rsa; Alg == dss; Alg == ecdsa ->
+    try privkey_to_pubkey_nif(Alg, format_pkey(Alg,EngineMap))
+    of
+        [_|_]=L -> map_ensure_bin_as_int(L);
+        X -> X
+    catch
+        error:badarg when Alg==ecdsa ->
+            {error, notsup};
+        error:badarg ->
+            {error, not_found};
+        error:notsup ->
+            {error, notsup}
+    end.
+            
+privkey_to_pubkey_nif(_Alg, _EngineMap) -> ?nif_stub.
+
+
 %%
 %% EC
 %%
@@ -1005,6 +1197,19 @@ ensure_int_as_bin(Int) when is_integer(Int) ->
 ensure_int_as_bin(Bin) ->
     Bin.
 
+map_ensure_bin_as_int(List) when is_list(List) ->
+    lists:map(fun ensure_bin_as_int/1, List).
+
+ensure_bin_as_int(Bin) when is_binary(Bin) ->
+    bin_to_int(Bin);
+ensure_bin_as_int(E) ->
+    E.
+
+format_pkey(_Alg, #{engine:=_, key_id:=T}=M) when is_binary(T) -> format_pwd(M);
+format_pkey(_Alg, #{engine:=_, key_id:=T}=M) when is_list(T) -> format_pwd(M#{key_id:=list_to_binary(T)});
+format_pkey(_Alg, #{engine:=_           }=M) -> error({bad_key_id, M});
+format_pkey(_Alg, #{}=M) -> error({bad_engine_map, M});
+%%%
 format_pkey(rsa, Key) ->
     map_ensure_int_as_bin(Key);
 format_pkey(ecdsa, [Key, Curve]) ->
@@ -1014,6 +1219,9 @@ format_pkey(dss, Key) ->
 format_pkey(_, Key) ->
     Key.
 
+format_pwd(#{password := Pwd}=M) when is_list(Pwd) -> M#{password := list_to_binary(Pwd)};
+format_pwd(M) -> M.
+
 %%--------------------------------------------------------------------
 %%
 -type rsa_padding() :: 'rsa_pkcs1_padding' | 'rsa_pkcs1_oaep_padding' | 'rsa_no_padding'.
@@ -1024,7 +1232,7 @@ pkey_crypt_nif(_Algorithm, _In, _Key, _Options, _IsPrivate, _IsEncrypt) -> ?nif_
 %% MP representaion  (SSH2)
 mpint(X) when X < 0 -> mpint_neg(X);
 mpint(X) -> mpint_pos(X).
- 
+
 -define(UINT32(X),   X:32/unsigned-big-integer).
 
 
@@ -1032,7 +1240,7 @@ mpint_neg(X) ->
     Bin = int_to_bin_neg(X, []),
     Sz = byte_size(Bin),
     <<?UINT32(Sz), Bin/binary>>.
-    
+
 mpint_pos(X) ->
     Bin = int_to_bin_pos(X, []),
     <<MSB,_/binary>> = Bin,
@@ -1054,7 +1262,6 @@ erlint(<<MPIntSize:32/integer,MPIntValue/binary>>) ->
 %%
 mod_exp_nif(_Base,_Exp,_Mod,_bin_hdr) -> ?nif_stub.
 
-
 %%%----------------------------------------------------------------
 %% 9470495 == V(0,9,8,zh).
 %% 268435615 == V(1,0,0,i).
@@ -1065,3 +1272,95 @@ packed_openssl_version(MAJ, MIN, FIX, P0) ->
     P1 = atom_to_list(P0),
     P = lists:sum([C-$a||C<-P1]),
     ((((((((MAJ bsl 8) bor MIN) bsl 8 ) bor FIX) bsl 8) bor (P+1)) bsl 4) bor 16#f).
+
+%%--------------------------------------------------------------------
+%% Engine nifs
+engine_by_id_nif(_EngineId) -> ?nif_stub.
+engine_init_nif(_Engine) -> ?nif_stub.
+engine_finish_nif(_Engine) -> ?nif_stub.
+engine_free_nif(_Engine) -> ?nif_stub.
+engine_load_dynamic_nif() -> ?nif_stub.
+engine_ctrl_cmd_strings_nif(_Engine, _Cmds, _Optional) -> ?nif_stub.
+engine_add_nif(_Engine)  -> ?nif_stub.
+engine_remove_nif(_Engine)  -> ?nif_stub.
+engine_register_nif(_Engine, _EngineMethod) -> ?nif_stub.
+engine_unregister_nif(_Engine, _EngineMethod) -> ?nif_stub.
+engine_get_first_nif() -> ?nif_stub.
+engine_get_next_nif(_Engine) -> ?nif_stub.
+engine_get_id_nif(_Engine) -> ?nif_stub.
+engine_get_all_methods_nif() -> ?nif_stub.
+
+%%--------------------------------------------------------------------
+%% Engine internals
+engine_nif_wrapper(ok) ->
+    ok;
+engine_nif_wrapper(notsup) ->
+    erlang:error(notsup);
+engine_nif_wrapper({error, Error}) ->
+    throw({error, Error}).
+
+ensure_bin_chardata(CharData) when is_binary(CharData) ->
+    CharData;
+ensure_bin_chardata(CharData) ->
+    unicode:characters_to_binary(CharData).
+
+ensure_bin_cmds(CMDs) ->
+    ensure_bin_cmds(CMDs, []).
+
+ensure_bin_cmds([], Acc) ->
+    lists:reverse(Acc);
+ensure_bin_cmds([{Key, Value} |CMDs], Acc) ->
+    ensure_bin_cmds(CMDs, [{ensure_bin_chardata(Key), ensure_bin_chardata(Value)} | Acc]);
+ensure_bin_cmds([Key | CMDs], Acc) ->
+    ensure_bin_cmds(CMDs, [{ensure_bin_chardata(Key), <<"">>} | Acc]).
+
+engine_methods_convert_to_bitmask([], BitMask) ->
+    BitMask;
+engine_methods_convert_to_bitmask(engine_method_all, _BitMask) ->
+    16#FFFF;
+engine_methods_convert_to_bitmask(engine_method_none, _BitMask) ->
+    16#0000;
+engine_methods_convert_to_bitmask([M |Ms], BitMask) ->
+    engine_methods_convert_to_bitmask(Ms, BitMask bor engine_method_atom_to_int(M)).
+
+bool_to_int(true) -> 1;
+bool_to_int(false) -> 0.
+
+engine_method_atom_to_int(engine_method_rsa) -> 16#0001;
+engine_method_atom_to_int(engine_method_dsa) -> 16#0002;
+engine_method_atom_to_int(engine_method_dh) -> 16#0004;
+engine_method_atom_to_int(engine_method_rand) -> 16#0008;
+engine_method_atom_to_int(engine_method_ecdh) -> 16#0010;
+engine_method_atom_to_int(engine_method_ecdsa) -> 16#0020;
+engine_method_atom_to_int(engine_method_ciphers) -> 16#0040;
+engine_method_atom_to_int(engine_method_digests) -> 16#0080;
+engine_method_atom_to_int(engine_method_store) -> 16#0100;
+engine_method_atom_to_int(engine_method_pkey_meths) -> 16#0200;
+engine_method_atom_to_int(engine_method_pkey_asn1_meths) -> 16#0400;
+engine_method_atom_to_int(engine_method_ec) -> 16#0800;
+engine_method_atom_to_int(X) ->
+    erlang:error(badarg, [X]).
+
+get_test_engine() ->
+    Type = erlang:system_info(system_architecture),
+    LibDir = filename:join([code:priv_dir(crypto), "lib"]),
+    ArchDir = filename:join([LibDir, Type]),
+    case filelib:is_dir(ArchDir) of        
+	true  -> check_otp_test_engine(ArchDir);
+	false -> check_otp_test_engine(LibDir)
+    end.
+
+check_otp_test_engine(LibDir) ->
+    case filelib:wildcard("otp_test_engine*", LibDir) of
+        [] ->
+            {error, notexist};
+        [LibName] ->
+            LibPath = filename:join(LibDir,LibName),
+            case filelib:is_file(LibPath) of
+                true ->
+                    {ok, unicode:characters_to_binary(LibPath)};
+                false ->
+                    {error, notexist}
+            end
+    end.
+            
diff --git a/lib/crypto/test/Makefile b/lib/crypto/test/Makefile
index 138081d386..e046a25338 100644
--- a/lib/crypto/test/Makefile
+++ b/lib/crypto/test/Makefile
@@ -7,7 +7,8 @@ include $(ERL_TOP)/make/$(TARGET)/otp.mk
 
 MODULES = \
 	blowfish_SUITE \
-	crypto_SUITE
+	crypto_SUITE \
+	engine_SUITE
 
 ERL_FILES= $(MODULES:%=%.erl)
 
@@ -27,7 +28,7 @@ RELSYSDIR = $(RELEASE_PATH)/crypto_test
 # FLAGS
 # ----------------------------------------------------
 ERL_MAKE_FLAGS += 
-ERL_COMPILE_FLAGS +=
+ERL_COMPILE_FLAGS += +nowarn_export_all
 
 EBIN = .
 MAKE_EMAKE = $(wildcard $(ERL_TOP)/make/make_emakefile)
@@ -77,7 +78,7 @@ release_spec:
 release_tests_spec: $(TEST_TARGET)
 	$(INSTALL_DIR) "$(RELSYSDIR)"
 	$(INSTALL_DATA) crypto.spec crypto.cover $(RELTEST_FILES) "$(RELSYSDIR)"
-	@tar cfh - crypto_SUITE_data | (cd "$(RELSYSDIR)"; tar xf -)
+	@tar cfh - *_SUITE_data | (cd "$(RELSYSDIR)"; tar xf -)
 	chmod -R u+w "$(RELSYSDIR)"
 
 release_docs_spec:
diff --git a/lib/crypto/test/crypto_SUITE.erl b/lib/crypto/test/crypto_SUITE.erl
index 69f02d3da6..6dab459df6 100644
--- a/lib/crypto/test/crypto_SUITE.erl
+++ b/lib/crypto/test/crypto_SUITE.erl
@@ -198,7 +198,7 @@ init_per_suite(Config) ->
 		    %% This is NOT how you want to do seeding, it is just here
 		    %% to make the tests pass. Check your OS manual for how you
 		    %% really want to seed.
-		    {H,M,L} = erlang:now(),
+		    {H,M,L} = erlang:timestamp(),
 		    Bin = <<H:24,M:20,L:20>>,
 		    crypto:rand_seed(<< <<Bin/binary>> || _ <- lists:seq(1,16) >>),
 		    Config
diff --git a/lib/crypto/test/engine_SUITE.erl b/lib/crypto/test/engine_SUITE.erl
new file mode 100644
index 0000000000..f410542f72
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE.erl
@@ -0,0 +1,665 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+
+-module(engine_SUITE).
+
+-include_lib("common_test/include/ct.hrl").
+
+%% Note: This directive should only be used in test suites.
+-compile(export_all).
+
+%%--------------------------------------------------------------------
+%% Common Test interface functions -----------------------------------
+%%--------------------------------------------------------------------
+suite() ->
+    [{ct_hooks,[ts_install_cth]},
+     {timetrap,{seconds, 10}}
+    ].
+
+all() ->
+    [
+     get_all_possible_methods,
+     engine_load_all_methods,
+     engine_load_some_methods,
+     bad_arguments,
+     unknown_engine,
+     pre_command_fail_bad_value,
+     pre_command_fail_bad_key,
+     failed_engine_init,
+     ctrl_cmd_string,
+     ctrl_cmd_string_optional,
+     {group, engine_stored_key}
+    ].
+
+groups() ->
+    [{engine_stored_key, [],
+      [sign_verify_rsa,
+       sign_verify_dsa,
+       sign_verify_ecdsa,
+       sign_verify_rsa_pwd,
+       sign_verify_rsa_pwd_bad_pwd,
+       priv_encrypt_pub_decrypt_rsa,
+       priv_encrypt_pub_decrypt_rsa_pwd,
+       pub_encrypt_priv_decrypt_rsa,
+       pub_encrypt_priv_decrypt_rsa_pwd,
+       get_pub_from_priv_key_rsa,
+       get_pub_from_priv_key_rsa_pwd,
+       get_pub_from_priv_key_rsa_pwd_no_pwd,
+       get_pub_from_priv_key_rsa_pwd_bad_pwd,
+       get_pub_from_priv_key_dsa,
+       get_pub_from_priv_key_ecdsa
+      ]}].
+
+
+init_per_suite(Config) ->
+    try crypto:start() of
+	ok ->
+            case crypto:info_lib() of
+                [{_,_, <<"OpenSSL 1.0.1s-freebsd  1 Mar 2016">>}] ->
+                    {skip, "Problem with engine on OpenSSL 1.0.1s-freebsd"};
+                _ ->
+                    Config
+            end;
+        {error,{already_started,crypto}} ->
+            Config
+    catch _:_ ->
+	    {skip, "Crypto did not start"}
+    end.
+end_per_suite(_Config) ->
+    ok.
+
+%%--------------------------------------------------------------------
+init_per_group(engine_stored_key, Config) ->
+    case load_storage_engine(Config) of
+        {ok, E} ->
+            KeyDir = key_dir(Config),
+            [{storage_engine,E}, {storage_dir,KeyDir} | Config];
+        {error, notexist} ->
+            {skip, "OTP Test engine not found"};
+        {error, notsup} ->
+            {skip, "Engine not supported on this OpenSSL version"};
+        {error, bad_engine_id} ->
+            {skip, "Dynamic Engine not supported"};
+        Other ->
+            ct:log("Engine load failed: ~p",[Other]),
+            {fail, "Engine load failed"}
+    end;
+init_per_group(_Group, Config0) ->
+    Config0.
+
+end_per_group(engine_stored_key, Config) ->
+    case proplists:get_value(storage_engine, Config) of
+        undefined ->
+            ok;
+        E ->
+            ok = crypto:engine_unload(E)
+    end;
+end_per_group(_, _) ->
+    ok.
+
+%%--------------------------------------------------------------------
+init_per_testcase(_Case, Config) ->
+    Config.
+end_per_testcase(_Case, _Config) ->
+    ok.
+
+%%-------------------------------------------------------------------------
+%% Test cases starts here.
+%%-------------------------------------------------------------------------
+get_all_possible_methods() ->
+    [{doc, "Just fetch all possible engine methods supported."}].
+
+get_all_possible_methods(Config) when is_list(Config) ->
+    try
+        List = crypto:engine_get_all_methods(),
+        ct:log("crypto:engine_get_all_methods() -> ~p\n", [List]),
+        ok
+    catch
+        error:notsup ->
+            {skip, "Engine not supported on this OpenSSL version"}
+    end.
+
+engine_load_all_methods()->
+    [{doc, "Use a dummy md5 engine that does not implement md5"
+      "but rather returns a static binary to test that crypto:engine_load "
+      "functions works."}].
+
+engine_load_all_methods(Config) when is_list(Config) ->
+    case crypto:get_test_engine() of
+        {error, notexist} ->
+            {skip, "OTP Test engine not found"};
+        {ok, Engine} ->
+            try 
+                Md5Hash1 =  <<106,30,3,246,166,222,229,158,244,217,241,179,50,232,107,109>>,
+                Md5Hash1 = crypto:hash(md5, "Don't panic"),
+                Md5Hash2 =  <<0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15>>,
+                case crypto:engine_load(<<"dynamic">>,
+                                        [{<<"SO_PATH">>, Engine},
+                                         {<<"ID">>, <<"MD5">>},
+                                         <<"LOAD">>],
+                                        []) of
+                    {ok, E} ->
+                        case crypto:hash(md5, "Don't panic") of
+                            Md5Hash1 ->
+                                ct:fail(fail_to_load_still_original_engine);
+                            Md5Hash2 ->
+                                ok;
+                            _ ->
+                                ct:fail(fail_to_load_engine)
+                        end,
+                        ok = crypto:engine_unload(E),
+                        case crypto:hash(md5, "Don't panic") of
+                            Md5Hash2 ->
+                                ct:fail(fail_to_unload_still_test_engine);
+                            Md5Hash1 ->
+                                ok;
+                            _ ->
+                                ct:fail(fail_to_unload_engine)
+                        end;
+                    {error, bad_engine_id} ->
+                        {skip, "Dynamic Engine not supported"}
+                end
+           catch
+               error:notsup ->
+                  {skip, "Engine not supported on this OpenSSL version"}
+           end
+    end.
+
+engine_load_some_methods()->
+    [{doc, "Use a dummy md5 engine that does not implement md5"
+      "but rather returns a static binary to test that crypto:engine_load "
+      "functions works."}].
+
+engine_load_some_methods(Config) when is_list(Config) ->
+    case crypto:get_test_engine() of
+        {error, notexist} ->
+            {skip, "OTP Test engine not found"};
+        {ok, Engine} ->
+            try 
+                Md5Hash1 =  <<106,30,3,246,166,222,229,158,244,217,241,179,50,232,107,109>>,
+                Md5Hash1 = crypto:hash(md5, "Don't panic"),
+                Md5Hash2 =  <<0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15>>,
+                EngineMethods = crypto:engine_get_all_methods() --
+                    [engine_method_dh,engine_method_rand,
+                     engine_method_ciphers, engine_method_store,
+                     engine_method_pkey_meths, engine_method_pkey_asn1_meths],
+                case crypto:engine_load(<<"dynamic">>,
+                                        [{<<"SO_PATH">>, Engine},
+                                         {<<"ID">>, <<"MD5">>},
+                                         <<"LOAD">>],
+                                        [],
+                                        EngineMethods) of
+                    {ok, E} ->        
+                        case crypto:hash(md5, "Don't panic") of
+                            Md5Hash1 ->
+                                ct:fail(fail_to_load_engine_still_original);
+                            Md5Hash2 ->
+                                ok;
+                            _ ->
+                                ct:fail(fail_to_load_engine)
+                        end,
+                        ok = crypto:engine_unload(E),
+                        case crypto:hash(md5, "Don't panic") of
+                            Md5Hash2 ->
+                                ct:fail(fail_to_unload_still_test_engine);
+                            Md5Hash1 ->
+                                ok;
+                            _ ->
+                                ct:fail(fail_to_unload_engine)
+                        end;
+                    {error, bad_engine_id} ->
+                    {skip, "Dynamic Engine not supported"}
+                end
+           catch
+               error:notsup ->
+                  {skip, "Engine not supported on this OpenSSL version"}
+           end
+    end.
+
+%%-------------------------------------------------------------------------
+%% Error cases
+bad_arguments()->
+    [{doc, "Test different arguments in bad format."}].
+
+bad_arguments(Config) when is_list(Config) ->
+    case crypto:get_test_engine() of
+        {error, notexist} ->
+            {skip, "OTP Test engine not found"};
+        {ok, Engine} ->
+            try 
+                try
+                    crypto:engine_load(fail_engine, [], [])
+                catch
+                    error:badarg ->
+                       ok
+                end,
+                try
+                    crypto:engine_load(<<"dynamic">>,
+                                       [{<<"SO_PATH">>, Engine},
+                                        1,
+                                        {<<"ID">>, <<"MD5">>},
+                                        <<"LOAD">>],
+                                       [])
+                catch
+                    error:badarg ->
+                       ok
+                end,
+                try
+                    crypto:engine_load(<<"dynamic">>,
+                                       [{<<"SO_PATH">>, Engine},
+                                        {'ID', <<"MD5">>},
+                                        <<"LOAD">>],
+                                       [])
+                catch
+                    error:badarg ->
+                       ok
+                end
+          catch
+              error:notsup ->
+                 {skip, "Engine not supported on this OpenSSL version"}
+          end
+    end.
+
+unknown_engine() ->
+    [{doc, "Try to load a non existent engine."}].
+
+unknown_engine(Config) when is_list(Config) ->
+    try
+        {error, bad_engine_id} = crypto:engine_load(<<"fail_engine">>, [], []),
+        ok
+    catch
+        error:notsup ->
+           {skip, "Engine not supported on this OpenSSL version"}
+    end.
+
+pre_command_fail_bad_value() ->
+    [{doc, "Test pre command due to bad value"}].
+
+pre_command_fail_bad_value(Config) when is_list(Config) ->
+    DataDir = unicode:characters_to_binary(code:priv_dir(crypto)),
+    try
+        case crypto:engine_load(<<"dynamic">>,
+                                [{<<"SO_PATH">>,
+                                  <<DataDir/binary, <<"/libfail_engine.so">>/binary >>},
+                                 {<<"ID">>, <<"MD5">>},
+                                 <<"LOAD">>],
+                                []) of
+            {error, ctrl_cmd_failed} ->
+                ok;
+            {error, bad_engine_id} ->
+                {skip, "Dynamic Engine not supported"}
+        end
+    catch
+        error:notsup ->
+           {skip, "Engine not supported on this OpenSSL version"}
+    end.
+
+pre_command_fail_bad_key() ->
+    [{doc, "Test pre command due to bad key"}].
+
+pre_command_fail_bad_key(Config) when is_list(Config) ->
+    try
+        case crypto:get_test_engine() of
+            {error, notexist} ->
+                {skip, "OTP Test engine not found"};
+            {ok, Engine} ->
+                case crypto:engine_load(<<"dynamic">>,
+                                        [{<<"SO_WRONG_PATH">>, Engine},
+                                         {<<"ID">>, <<"MD5">>},
+                                         <<"LOAD">>],
+                                        []) of
+                    {error, ctrl_cmd_failed} ->
+                        ok;
+                    {error, bad_engine_id} ->
+                        {skip, "Dynamic Engine not supported"}
+                end
+        end
+   catch 
+       error:notsup ->
+          {skip, "Engine not supported on this OpenSSL version"}
+   end.
+
+failed_engine_init()->
+    [{doc, "Test failing engine init due to missed pre command"}].
+
+failed_engine_init(Config) when is_list(Config) ->
+    try
+        case crypto:get_test_engine() of
+            {error, notexist} ->
+                {skip, "OTP Test engine not found"};
+            {ok, Engine} ->
+                case crypto:engine_load(<<"dynamic">>,
+                                        [{<<"SO_PATH">>, Engine},
+                                         {<<"ID">>, <<"MD5">>}],
+                                        []) of
+                    {error, add_engine_failed} ->
+                        ok;
+                    {error, bad_engine_id} ->
+                        {skip, "Dynamic Engine not supported"}
+                end
+        end
+   catch 
+       error:notsup ->
+          {skip, "Engine not supported on this OpenSSL version"}
+   end.
+
+
+ctrl_cmd_string()->
+    [{doc, "Test that a not known optional ctrl comand do not fail"}].
+ctrl_cmd_string(Config) when is_list(Config) ->
+    try
+        case crypto:get_test_engine() of
+            {error, notexist} ->
+                {skip, "OTP Test engine not found"};
+            {ok, Engine} ->
+                case crypto:engine_load(<<"dynamic">>,
+                                        [{<<"SO_PATH">>, Engine},
+                                         {<<"ID">>, <<"MD5">>},
+                                         <<"LOAD">>],
+                                        []) of
+                    {ok, E} ->        
+                        case crypto:engine_ctrl_cmd_string(E, <<"TEST">>, <<"17">>) of
+                            ok ->
+                                ct:fail(fail_ctrl_cmd_should_fail);
+                            {error,ctrl_cmd_failed} -> 
+                                ok
+                        end,
+                        ok = crypto:engine_unload(E);              
+                    {error, bad_engine_id} ->
+                        {skip, "Dynamic Engine not supported"}
+                end
+        end
+   catch 
+       error:notsup ->
+          {skip, "Engine not supported on this OpenSSL version"}
+   end.        
+
+ctrl_cmd_string_optional()->
+    [{doc, "Test that a not known optional ctrl comand do not fail"}].
+ctrl_cmd_string_optional(Config) when is_list(Config) ->
+    try
+        case crypto:get_test_engine() of
+            {error, notexist} ->
+                {skip, "OTP Test engine not found"};
+            {ok, Engine} ->
+                case crypto:engine_load(<<"dynamic">>,
+                                        [{<<"SO_PATH">>, Engine},
+                                         {<<"ID">>, <<"MD5">>},
+                                         <<"LOAD">>],
+                                        []) of
+                    {ok, E} ->        
+                        case crypto:engine_ctrl_cmd_string(E, <<"TEST">>, <<"17">>, true) of
+                            ok ->
+                                ok;
+                            _ -> 
+                                ct:fail(fail_ctrl_cmd_string)
+                        end,
+                        ok = crypto:engine_unload(E);              
+                    {error, bad_engine_id} ->
+                        {skip, "Dynamic Engine not supported"}
+                end
+        end
+   catch 
+       error:notsup ->
+          {skip, "Engine not supported on this OpenSSL version"}
+   end.        
+
+%%%----------------------------------------------------------------
+%%% Pub/priv key storage tests.  Thoose are for testing the crypto.erl
+%%% support for using priv/pub keys stored in an engine.
+
+sign_verify_rsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key.pem")},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_public_key.pem")},
+    sign_verify(rsa, sha, Priv, Pub).
+
+sign_verify_dsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "dsa_private_key.pem")},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "dsa_public_key.pem")},
+    sign_verify(dss, sha, Priv, Pub).
+
+sign_verify_ecdsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "ecdsa_private_key.pem")},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "ecdsa_public_key.pem")},
+    sign_verify(ecdsa, sha, Priv, Pub).
+
+sign_verify_rsa_pwd(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key_pwd.pem"),
+             password => "password"},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_public_key_pwd.pem")},
+    sign_verify(rsa, sha, Priv, Pub).
+
+sign_verify_rsa_pwd_bad_pwd(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key_pwd.pem"),
+             password => "Bad password"},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_public_key_pwd.pem")},
+    try sign_verify(rsa, sha, Priv, Pub) of
+        _ -> {fail, "PWD prot pubkey sign succeded with no pwd!"}
+    catch
+        error:badarg -> ok
+    end.  
+
+priv_encrypt_pub_decrypt_rsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key.pem")},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_public_key.pem")},
+    priv_enc_pub_dec(rsa, Priv, Pub,  rsa_pkcs1_padding).
+
+priv_encrypt_pub_decrypt_rsa_pwd(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key_pwd.pem"),
+             password => "password"},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_public_key_pwd.pem")},
+    priv_enc_pub_dec(rsa, Priv, Pub,  rsa_pkcs1_padding).
+
+pub_encrypt_priv_decrypt_rsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key.pem")},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_public_key.pem")},
+    pub_enc_priv_dec(rsa, Pub, Priv,  rsa_pkcs1_padding).
+
+pub_encrypt_priv_decrypt_rsa_pwd(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key_pwd.pem"),
+             password => "password"},
+    Pub  = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_public_key_pwd.pem")},
+    pub_enc_priv_dec(rsa, Pub, Priv,  rsa_pkcs1_padding).
+
+get_pub_from_priv_key_rsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key.pem")},
+    case crypto:privkey_to_pubkey(rsa, Priv) of
+        {error, not_found} ->
+            {fail, "Key not found"};
+        {error, notsup} ->
+            {skip, "RSA not supported"};
+        {error, Error} ->
+            {fail, {wrong_error,Error}};
+        Pub ->
+            ct:log("rsa Pub = ~p",[Pub]),
+            sign_verify(rsa, sha, Priv, Pub)
+    end.
+
+get_pub_from_priv_key_rsa_pwd(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key_pwd.pem"),
+             password => "password"},
+    case crypto:privkey_to_pubkey(rsa, Priv) of
+        {error, not_found} ->
+            {fail, "Key not found"};
+        {error, notsup} ->
+            {skip, "RSA not supported"};
+        {error, Error} ->
+            {fail, {wrong_error,Error}};
+        Pub ->
+            ct:log("rsa Pub = ~p",[Pub]),
+            sign_verify(rsa, sha, Priv, Pub)
+    end.
+
+get_pub_from_priv_key_rsa_pwd_no_pwd(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key_pwd.pem")},
+    case crypto:privkey_to_pubkey(rsa, Priv) of
+        {error, not_found} ->
+            ok;
+        {error, notsup} ->
+            {skip, "RSA not supported"};
+        {error, Error} ->
+            {fail, {wrong_error,Error}};
+        Pub -> 
+            ct:log("rsa Pub = ~p",[Pub]),
+            {fail, "PWD prot pubkey fetch succeded although no pwd!"}
+    end.
+
+get_pub_from_priv_key_rsa_pwd_bad_pwd(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "rsa_private_key_pwd.pem"),
+             password => "Bad password"},
+    case crypto:privkey_to_pubkey(rsa, Priv) of
+        {error, not_found} ->
+            ok;
+        {error, notsup} ->
+            {skip, "RSA not supported"};
+        {error, Error} ->
+            {fail, {wrong_error,Error}};
+        Pub -> 
+            ct:log("rsa Pub = ~p",[Pub]),
+            {fail, "PWD prot pubkey fetch succeded with bad pwd!"}
+    end.
+
+get_pub_from_priv_key_dsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "dsa_private_key.pem")},
+    case crypto:privkey_to_pubkey(dss, Priv) of
+        {error, not_found} ->
+            {fail, "Key not found"};
+        {error, notsup} ->
+            {skip, "DSA not supported"};
+        {error, Error} ->
+            {fail, {wrong_error,Error}};
+        Pub ->
+            ct:log("dsa Pub = ~p",[Pub]),
+            sign_verify(dss, sha, Priv, Pub)
+    end.
+
+get_pub_from_priv_key_ecdsa(Config) ->
+    Priv = #{engine => engine_ref(Config),
+             key_id => key_id(Config, "ecdsa_private_key.pem")},
+    case crypto:privkey_to_pubkey(ecdsa, Priv) of
+        {error, not_found} ->
+            {fail, "Key not found"};
+        {error, notsup} ->
+            {skip, "ECDSA not supported"};
+        {error, Error} ->
+            {fail, {wrong_error,Error}};
+        Pub ->
+            ct:log("ecdsa Pub = ~p",[Pub]),
+            sign_verify(ecdsa, sha, Priv, Pub)
+    end.
+    
+%%%================================================================
+%%% Help for engine_stored_pub_priv_keys* test cases
+%%%
+load_storage_engine(_Config) ->
+    case crypto:get_test_engine() of
+        {ok, Engine} ->
+            try crypto:engine_load(<<"dynamic">>,
+                                   [{<<"SO_PATH">>, Engine},
+                                    <<"LOAD">>],
+                                   [])
+            catch
+                error:notsup ->
+                    {error, notsup}
+            end;
+
+        {error, Error} ->
+            {error, Error}
+    end.
+
+
+key_dir(Config) ->
+    DataDir = unicode:characters_to_binary(proplists:get_value(data_dir, Config)),
+    filename:join(DataDir, "pkcs8").
+
+
+engine_ref(Config) ->
+    proplists:get_value(storage_engine, Config).
+
+key_id(Config, File) ->
+    filename:join(proplists:get_value(storage_dir,Config), File).
+
+pubkey_alg_supported(Alg) ->
+    lists:member(Alg,
+                 proplists:get_value(public_keys, crypto:supports())).
+
+
+pub_enc_priv_dec(Alg, KeyEnc, KeyDec, Padding) ->
+    case pubkey_alg_supported(Alg) of
+        true ->
+            PlainText = <<"Hej på dig">>,
+            CryptoText = crypto:public_encrypt(Alg, PlainText, KeyEnc, Padding),
+            case crypto:private_decrypt(Alg, CryptoText, KeyDec, Padding) of
+                PlainText -> ok;
+                _ -> {fail, "Encrypt-decrypt error"}
+            end;
+        false ->
+            {skip, lists:concat([Alg," is not supported by cryptolib"])}
+    end.
+
+priv_enc_pub_dec(Alg, KeyEnc, KeyDec, Padding) ->
+    case pubkey_alg_supported(Alg) of
+        true ->
+            PlainText = <<"Hej på dig">>,
+            CryptoText = crypto:private_encrypt(Alg, PlainText, KeyEnc, Padding),
+            case crypto:public_decrypt(Alg, CryptoText, KeyDec, Padding) of
+                PlainText -> ok;
+                _ -> {fail, "Encrypt-decrypt error"}
+            end;
+        false ->
+            {skip, lists:concat([Alg," is not supported by cryptolib"])}
+    end.
+
+sign_verify(Alg, Sha, KeySign, KeyVerify) ->
+    case pubkey_alg_supported(Alg) of
+        true ->
+            PlainText = <<"Hej på dig">>,
+            Signature = crypto:sign(Alg, Sha, PlainText, KeySign),
+            case crypto:verify(Alg, Sha, PlainText, Signature, KeyVerify) of
+                true -> ok;
+                _ -> {fail, "Sign-verify error"}
+            end;
+        false ->
+            {skip, lists:concat([Alg," is not supported by cryptolib"])}
+    end.
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/dsa_private_key.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/dsa_private_key.pem
new file mode 100644
index 0000000000..778ffac675
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/dsa_private_key.pem
@@ -0,0 +1,9 @@
+-----BEGIN PRIVATE KEY-----
+MIIBSwIBADCCASwGByqGSM44BAEwggEfAoGBAMyitTMR7vPbpqyAXJpqnB0AhFwQ
+F87IE+JKFl5bD/MSkhhRV5sM73HUU1ooXY0FjhZ+cdLUCATuZR5ta4ydANqWIcAB
+gX3IwF1B4zf5SXEKTWkUYneL9dOKtiZLtoG28swrk8xMxwX+0fLHkltCEj6FiTW9
+PFrv8GmIfV6DjcI9AhUAqXWbb3RtoN9Ld28fVMhGZrj3LJUCgYEAwnxGHGBMpJaF
+2w7zAw3jHjL8PMYlV6vnufGHQlwF0ZUXJxRsvagMb/X1qACTu2VPYEVoLQGM3cfH
+EhHoQmvSXGAyTfR7Bmn3gf1n/s/DcFbdZduUCZ/rAyIrfd0eSbc1I+kZk85UCsKK
+w/IYdlqcuYa4Cgm2TapT5uEMqH4jhzEEFgIULh8swEUWmU8aJNWsrWl4eCiuUUg=
+-----END PRIVATE KEY-----
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/dsa_public_key.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/dsa_public_key.pem
new file mode 100644
index 0000000000..0fa5428828
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/dsa_public_key.pem
@@ -0,0 +1,12 @@
+-----BEGIN PUBLIC KEY-----
+MIIBtzCCASwGByqGSM44BAEwggEfAoGBAMyitTMR7vPbpqyAXJpqnB0AhFwQF87I
+E+JKFl5bD/MSkhhRV5sM73HUU1ooXY0FjhZ+cdLUCATuZR5ta4ydANqWIcABgX3I
+wF1B4zf5SXEKTWkUYneL9dOKtiZLtoG28swrk8xMxwX+0fLHkltCEj6FiTW9PFrv
+8GmIfV6DjcI9AhUAqXWbb3RtoN9Ld28fVMhGZrj3LJUCgYEAwnxGHGBMpJaF2w7z
+Aw3jHjL8PMYlV6vnufGHQlwF0ZUXJxRsvagMb/X1qACTu2VPYEVoLQGM3cfHEhHo
+QmvSXGAyTfR7Bmn3gf1n/s/DcFbdZduUCZ/rAyIrfd0eSbc1I+kZk85UCsKKw/IY
+dlqcuYa4Cgm2TapT5uEMqH4jhzEDgYQAAoGAXPygOFYdeKgfLmuIC303cESYXvic
+e2GNJomv8vaWLZmbLVVDfwA1fNsuF1hZkWw8f7aYaN9iZ3yl9u4Yk4TbJKkqfJqd
+dgVt288SUqvi+NMHODUzYi9KAOXxupXffZSvdu54gKRaDuFTZ5XNcRqIJWGYlJYg
+NVHF5FPZ4Bk2FYA=
+-----END PUBLIC KEY-----
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/ecdsa_private_key.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/ecdsa_private_key.pem
new file mode 100644
index 0000000000..a45522064f
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/ecdsa_private_key.pem
@@ -0,0 +1,8 @@
+-----BEGIN PRIVATE KEY-----
+MIHuAgEAMBAGByqGSM49AgEGBSuBBAAjBIHWMIHTAgEBBEIBparGjr0KcdNrVM2J
+G0mW5ltP1QyvxDqBMyWLWo3fruRZv6Qoohl5skd1u4O+KJoM/UrrSTOXI/MDR7NN
+i1yl7O+hgYkDgYYABAG8K2XVsK0ahG9+HIIPwCO0pJY8ulwSTXwIjkCGyB2lpglh
+8qJmRzuyGcfRTslv8wfv0sPlT9H9PKDvgrTUL7rvQQDdOODNgVPXSecUoXoPn+X+
+eqxs77bjx+A5x0t/i3m5PfkaNPh5MZ1H/bWuOOdj2ZXZw0R4rlVc0zVrgnPU8L8S
+BQ==
+-----END PRIVATE KEY-----
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/ecdsa_public_key.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/ecdsa_public_key.pem
new file mode 100644
index 0000000000..6d22fe43fe
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/ecdsa_public_key.pem
@@ -0,0 +1,6 @@
+-----BEGIN PUBLIC KEY-----
+MIGbMBAGByqGSM49AgEGBSuBBAAjA4GGAAQBvCtl1bCtGoRvfhyCD8AjtKSWPLpc
+Ek18CI5AhsgdpaYJYfKiZkc7shnH0U7Jb/MH79LD5U/R/Tyg74K01C+670EA3Tjg
+zYFT10nnFKF6D5/l/nqsbO+248fgOcdLf4t5uT35GjT4eTGdR/21rjjnY9mV2cNE
+eK5VXNM1a4Jz1PC/EgU=
+-----END PUBLIC KEY-----
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_private_key.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_private_key.pem
new file mode 100644
index 0000000000..ea0e3d3958
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_private_key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_private_key_pwd.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_private_key_pwd.pem
new file mode 100644
index 0000000000..501662fc35
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_private_key_pwd.pem
@@ -0,0 +1,30 @@
+-----BEGIN ENCRYPTED PRIVATE KEY-----
+MIIFDjBABgkqhkiG9w0BBQ0wMzAbBgkqhkiG9w0BBQwwDgQIh888Iq6gxuMCAggA
+MBQGCCqGSIb3DQMHBAic/11YZ8Nt5gSCBMjG/Jb4qiMoBS50iQvHXqcETPE+0NBr
+jhsn9w94LkdRBstMPAsoKmY98Er96Rnde/NfmqlU9CupKTkd7Ce5poBf72Y6KMED
+cPURyjbGRFsu6x9skXB2obhyKYEqAEF2oQAg4Qbe5v1qXBIgDuC/NgiJnM+w2zCZ
+LkHSZB2/NmcnvDzcgPF7TM8pTO23xCJ33m37qjfWvHsgocVqZmL9wQ4+wr/NMYjJ
+pJvX1OHW1vBsZsXh40WchalYRSB1VeO368QfsE8coRJztqbMzdce9EQdMB6Q6jlO
+cetd3moLIoMP4I7HW0/SgokbycTbRiYSvRyU1TGc2WbW6BrFZV24IckcnnVUFatf
+6HKUcaYLG68dJcRgs5QMGkcmgVvlddENHFmHZlo0eym/xSiUl/AT8/5odscm6ML8
+wW5sneax+TF4J2eYmiN7yjAUCodXVTNYNDVKo6uUhntlymbM0o4UitVIbPIfTDHl
+sxJAEZ7vpuPqeNMxUk6G6zipuEjqsVbnuFSBSZmgKiGYcifRPUmqqINa3DdS4WVx
+xaPWdHbHVRD//ze3h/FsA+1lIE5q2kUE0xXseJA1ISog++kJp14XeaaL2j/tx3Ob
+OsbcaOAD/IUw/ItDt9kn0qzfnar7sS0Wov8AmJQxHmH7Lm93jHTLM05yE0AR/eBr
+Mig2ZdC+9OqVC+GPuBkRjSs8NpltQIDroz6EV9IMwPwXm0szSYoyoPLmlHJUdnLs
+ZUef+au6hYkEJBrvuisagnq5eT/fCV3hsjD7yODebNU2CmBTo6X2PRx/xsBHRMWl
+QkoM9PBdSCnKv6HpHl4pchuoqU2NpFjN0BCaad6aHfZSTnqgzK4bEh1oO6dI8/rB
+/eh71JyFFG5J4xbpaqz5Su01V1iwU5leK5bDwqals4M4+ZGHGciou7qnXUmX2fJl
+r6DlMUa/xy+A2ZG0NuZR05yk2oB3+KVNMgp6zFty3XaxwoNtc8GTLtLnBnIh2rlP
+mE1+I65LRWwrNQalPeOAUrYuEzhyp2Df7a8Ykas5PUH7MGR/S0Ge/dLxtE2bJuK4
+znbLAsGhvo/SbNxYqIp6D4iDtd3va6yUGncy41paA/vTKFVvXZDrXcwJQYYCVOGT
+OwdzNuozU8Dc7oxsd8oakfC46kvmVaOrGvZbm56PFfprcaL/Hslska5xxEni/eZe
+WRxZbCBhAVqS1pn5zkDQVUe9uFlR/x39Qi01HIlKLBsjpSs6qQsFArMe8hgXmXLG
+xP+dyVuOE18NzSewdEjeqSRKIM7Qi8EOjZsI4HdSRBY7bh9VhmaVXDZiCSf33TTE
+3y8nimzQAeuGoYg6WqHmWWC2Qnpki2HlaIH/ayXEyQWkP/qvg61e8ovdg9Fy8JOO
+0AacXVt5zj0q00AW5bKx7usi4NIjZedi86hUm6H19aBm7r86BKjwYTEI/GOcdrbV
+9HC/8ayOimgwiAG3gq+aLioWym+Z6KnsbVd7XReVbvM/InQx54WA2y5im0A+/c67
+oQFFPV84XGX9waeqv/K4Wzkm6HW+qVAEM67482VGOf0PVrlQMno6dOotT/Y7ljoZ
+2iz0LmN9yylJnLPDrr1i6gzbs5OhhUgbF5LI2YP2wWdCZTl/DrKSIvQZWl8U+tw3
+ciA=
+-----END ENCRYPTED PRIVATE KEY-----
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_public_key.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_public_key.pem
new file mode 100644
index 0000000000..d3fb5a2cc9
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_public_key.pem
@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsMG9P3XVxl0xSuBS8V3V
+emv1iTEqDz0ueUb2SABxbIk7bzy2yfC8Q7GesElWSzdP1EOMHVp/Y37co1OfyMQV
+RvFzrSopkzL5t/2Ts1S7nhhwW6y2LHEb/aC/ObpUyh1oK2Q7tJQV+SSUyL+VEwhK
+8yUUG5GvQxtRmgYA29T5V35MwVjMH7AWZsKAu+yrwnCBgoG1v1wmNN0z9t04PHa7
+6QcjErXXT9hUOH2fdahVMz7vLoWRLKkkExZZoYBhMe3S5ZMtMb7utkbgA0U6SDaX
+FmbVgx03bLDqruudy8MKgWPJQaKQmf+AH/EEd2WJEIXp9WCxG1YXl0bsyC0gmSIi
+TQIDAQAB
+-----END PUBLIC KEY-----
diff --git a/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_public_key_pwd.pem b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_public_key_pwd.pem
new file mode 100644
index 0000000000..f74361cead
--- /dev/null
+++ b/lib/crypto/test/engine_SUITE_data/pkcs8/rsa_public_key_pwd.pem
@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxquo1Na8C+kjeW0YESGm
+vE1bgNW9xh+SQjU1fv/97ePK8mQW2zO1h/vUNz23pfZAKjQu3rlFW/VgGJQ0LgCs
+8Gr/HbMwNcCJzuFMePUrnWn/qBeR7OKUZCJ3E1pp4kwsTdGDDO7jPtNzKf0bdKlg
+G2GHfZWhUediRX8NsRg12X1odVPuRGVRsyJ952YODk9PFjK7pro7Ynf3Icx7di9d
+PXL5vEcKSRdomXvt1rgM8XVHES94RQqoz60ZhfV2JnPfa9V8qu0KaGntpEr7p4rQ
+5BSiLFPjPOArjsD5tKyo8ldKCdQjLfisEp7AetfMjLPVVPw9o/SmCjDxsYWTVRQ2
+tQIDAQAB
+-----END PUBLIC KEY-----
diff --git a/lib/crypto/vsn.mk b/lib/crypto/vsn.mk
index 1dceebb4e4..3432f00836 100644
--- a/lib/crypto/vsn.mk
+++ b/lib/crypto/vsn.mk
@@ -1 +1 @@
-CRYPTO_VSN = 4.1
+CRYPTO_VSN = 4.2.1
diff --git a/lib/debugger/doc/src/Makefile b/lib/debugger/doc/src/Makefile
index 0f724b6f17..cc0b8861d3 100644
--- a/lib/debugger/doc/src/Makefile
+++ b/lib/debugger/doc/src/Makefile
@@ -41,7 +41,7 @@ XML_APPLICATION_FILES = ref_man.xml
 XML_REF3_FILES = debugger.xml i.xml int.xml
 
 XML_PART_FILES = part.xml
-XML_CHAPTER_FILES = debugger_chapter.xml notes.xml
+XML_CHAPTER_FILES = introduction.xml debugger_chapter.xml notes.xml
 
 BOOK_FILES = book.xml
 
diff --git a/lib/debugger/doc/src/notes.xml b/lib/debugger/doc/src/notes.xml
index 21fe7d449d..e71746e30d 100644
--- a/lib/debugger/doc/src/notes.xml
+++ b/lib/debugger/doc/src/notes.xml
@@ -33,6 +33,21 @@
   <p>This document describes the changes made to the Debugger
     application.</p>
 
+<section><title>Debugger 4.2.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Do not quote variables and button names in Debugger
+	    windows. The bug was introduced in Erlang/OTP 20.1. </p>
+          <p>
+	    Own Id: OTP-14802</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Debugger 4.2.3</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/debugger/src/dbg_debugged.erl b/lib/debugger/src/dbg_debugged.erl
index e142af4ae0..8b64a60a9c 100644
--- a/lib/debugger/src/dbg_debugged.erl
+++ b/lib/debugger/src/dbg_debugged.erl
@@ -31,32 +31,25 @@
 %% Called via the error handler.
 %%--------------------------------------------------------------------
 eval(Mod, Func, Args) ->
-    SaveStacktrace = erlang:get_stacktrace(),
     Meta = dbg_ieval:eval(Mod, Func, Args),
     Mref = erlang:monitor(process, Meta),
-    msg_loop(Meta, Mref, SaveStacktrace).
+    msg_loop(Meta, Mref).
 
 %%====================================================================
 %% Internal functions
 %%====================================================================
 
-msg_loop(Meta, Mref, SaveStacktrace) ->
+msg_loop(Meta, Mref) ->
     receive
 
 	%% Evaluated function has returned a value
 	{sys, Meta, {ready, Val}} ->
 	    erlang:demonitor(Mref, [flush]),
-
-	    %% Restore original stacktrace and return the value
-	    try erlang:raise(throw, stack, SaveStacktrace)
-	    catch
-		throw:stack ->
-		    case Val of
-			{dbg_apply,M,F,A} ->
-			    apply(M, F, A);
-			_ ->
-			    Val
-		    end
+            case Val of
+                {dbg_apply,M,F,A} ->
+                    apply(M, F, A);
+                _ ->
+                    Val
 	    end;
 
 	%% Evaluated function raised an (uncaught) exception
@@ -74,32 +67,25 @@ msg_loop(Meta, Mref, SaveStacktrace) ->
 		Meta ! {self(), rec_acked},
 		ok
 	    end,
-	    msg_loop(Meta, Mref, SaveStacktrace);
+	    msg_loop(Meta, Mref);
 
 	%% Meta needs something evaluated within context of real process
 	{sys, Meta, {command,Command}} ->
 	    Reply = handle_command(Command),
 	    Meta ! {sys, self(), Reply},
-	    msg_loop(Meta, Mref, SaveStacktrace);
+	    msg_loop(Meta, Mref);
 
 	%% Meta has terminated
 	%% Must be due to int:stop() (or -heaven forbid- a debugger bug)
 	{'DOWN', Mref, _, _, Reason} ->
-
-	    %% Restore original stacktrace and return a dummy value
-	    try erlang:raise(throw, stack, SaveStacktrace)
-	    catch
-		throw:stack ->
-		    {interpreter_terminated, Reason}
-	    end
+            {interpreter_terminated, Reason}
     end.
 
 handle_command(Command) ->
     try
 	reply(Command)
-    catch Class:Reason ->
-	    Stacktrace = stacktrace_f(erlang:get_stacktrace()),
-	    {exception,{Class,Reason,Stacktrace}}
+    catch Class:Reason:Stacktrace ->
+	    {exception,{Class,Reason,stacktrace_f(Stacktrace)}}
     end.
 
 reply({apply,M,F,As}) ->
diff --git a/lib/debugger/src/dbg_ieval.erl b/lib/debugger/src/dbg_ieval.erl
index 8009d62629..9840cebc1a 100644
--- a/lib/debugger/src/dbg_ieval.erl
+++ b/lib/debugger/src/dbg_ieval.erl
@@ -924,8 +924,7 @@ expr({dbg,Line,raise,As0}, Bs0, #ieval{level=Le}=Ieval0) ->
 	trace(return, {Le,Error}),
 	{value,Error,Bs}
     catch
-	_:_ ->
-	    Stk = erlang:get_stacktrace(),	%Possibly truncated.
+	_:_:Stk ->                              %Possibly truncated.
 	    StkFun = fun(_) -> Stk end,
 	    do_exception(Class, Reason, StkFun, Bs, Ieval)
     end;
@@ -1034,7 +1033,7 @@ expr({send,Line,To0,Msg0}, Bs0, Ieval0) ->
 
 %% Binary
 expr({bin,Line,Fs}, Bs0, Ieval0) ->
-    Ieval = Ieval0#ieval{line=Line},
+    Ieval = Ieval0#ieval{line=Line,top=false},
     try
 	eval_bits:expr_grp(Fs, Bs0,
 			   fun (E, B) -> expr(E, B, Ieval) end,
diff --git a/lib/debugger/src/dbg_wx_mon.erl b/lib/debugger/src/dbg_wx_mon.erl
index a32a6894b8..00aee62a87 100644
--- a/lib/debugger/src/dbg_wx_mon.erl
+++ b/lib/debugger/src/dbg_wx_mon.erl
@@ -119,9 +119,9 @@ init(CallingPid, Mode, SFile) ->
 		init2(CallingPid, Mode, SFile, GS)
 	    catch 
 		exit:stop -> stop;
-		Error:Reason ->
+		Error:Reason:Stacktrace ->
 		    io:format("~p: Crashed {~p,~p} in~n  ~p",
-			      [?MODULE, Error, Reason, erlang:get_stacktrace()])
+			      [?MODULE, Error, Reason, Stacktrace])
 	    end
     end.
 
diff --git a/lib/debugger/src/dbg_wx_trace.erl b/lib/debugger/src/dbg_wx_trace.erl
index b1e0e03b4c..505d53005f 100644
--- a/lib/debugger/src/dbg_wx_trace.erl
+++ b/lib/debugger/src/dbg_wx_trace.erl
@@ -95,9 +95,9 @@ start(Pid, Env, Parent, TraceWin, BackTrace, Strings) ->
 	    catch 
 		_:stop ->
 		    exit(stop);
-		E:R ->
+		E:R:S ->
 		    io:format("TraceWin Crashed ~p~n",[E]),
-		    io:format(" ~p in ~p~n",[R, erlang:get_stacktrace()]),
+		    io:format(" ~p in ~p~n",[R, S]),
 		    exit(R)
 	    end;
 	error ->
diff --git a/lib/debugger/src/dbg_wx_win.erl b/lib/debugger/src/dbg_wx_win.erl
index 9f59915476..f1298154ab 100644
--- a/lib/debugger/src/dbg_wx_win.erl
+++ b/lib/debugger/src/dbg_wx_win.erl
@@ -299,7 +299,7 @@ open_help(_Parent, HelpHtmlFile) ->
 %%--------------------------------------------------------------------
     
 to_string(Atom) when is_atom(Atom) ->
-    io_lib:format("~tw", [Atom]);
+    atom_to_list(Atom);
 to_string(Integer) when is_integer(Integer) ->
     integer_to_list(Integer);
 to_string([]) -> "";
diff --git a/lib/debugger/test/guard_SUITE.erl b/lib/debugger/test/guard_SUITE.erl
index f7874f79df..e781ea932f 100644
--- a/lib/debugger/test/guard_SUITE.erl
+++ b/lib/debugger/test/guard_SUITE.erl
@@ -390,7 +390,7 @@ all_types() ->
      {atom, xxxx},
      {ref, make_ref()},
      {pid, self()},
-     {port, open_port({spawn, efile}, [])},
+     {port, make_port()},
      {function, fun(X) -> X+1, "" end},
      {binary, list_to_binary([])}].
 
@@ -435,6 +435,9 @@ type_test(binary, X) when binary(X) ->
 type_test(function, X) when function(X) ->
     function.
 
+make_port() ->
+    hd(erlang:ports()).
+
 const_guard(Config) when is_list(Config) ->
     if
 	(0 == 0) and ((0 == 0) or (0 == 0)) ->
diff --git a/lib/debugger/test/int_eval_SUITE.erl b/lib/debugger/test/int_eval_SUITE.erl
index 27ca4852b5..da1d6734f8 100644
--- a/lib/debugger/test/int_eval_SUITE.erl
+++ b/lib/debugger/test/int_eval_SUITE.erl
@@ -29,7 +29,8 @@
 	 bifs_outside_erlang/1, spawning/1, applying/1,
 	 catch_and_throw/1, external_call/1, test_module_info/1,
 	 apply_interpreted_fun/1, apply_uninterpreted_fun/1,
-	 interpreted_exit/1, otp_8310/1, stacktrace/1, maps/1]).
+	 interpreted_exit/1, otp_8310/1, stacktrace/1, maps/1,
+	 call_inside_binary/1]).
 
 %% Helpers.
 -export([applier/3]).
@@ -45,7 +46,8 @@ all() ->
     [bifs_outside_erlang, spawning, applying,
      catch_and_throw, external_call, test_module_info,
      apply_interpreted_fun, apply_uninterpreted_fun,
-     interpreted_exit, otp_8310, stacktrace, maps].
+     interpreted_exit, otp_8310, stacktrace, maps,
+     call_inside_binary].
 
 groups() -> 
     [].
@@ -275,6 +277,9 @@ maps(Config) when is_list(Config) ->
     [#{hello := 0, price := 0}] = spawn_eval(fun () -> ?IM:update_in_fun() end),
     ok.
 
+call_inside_binary(Config) when is_list(Config) ->
+    <<"1">> = ?IM:call_inside_binary(fun erlang:integer_to_binary/1),
+    ok.
 
 do_eval(Config, Mod) ->
     DataDir = proplists:get_value(data_dir, Config),
diff --git a/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl b/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl
index ca7929c10b..384d61f051 100644
--- a/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl
+++ b/lib/debugger/test/int_eval_SUITE_data/my_int_eval_module.erl
@@ -31,6 +31,7 @@
 -export([f/1, f_try/1, f_catch/1]).
 -export([otp_5837/1, otp_8310/0]).
 -export([empty_map_update/1, update_in_fun/0]).
+-export([call_inside_binary/1]).
 
 %% Internal exports.
 -export([echo/2,my_subtract/2,catch_a_ball/0,throw_a_ball/0]).
@@ -248,3 +249,6 @@ empty_map_update(Map) -> Map#{}.
 
 update_in_fun() ->
     lists:map(fun (X) -> X#{price := 0} end, [#{hello => 0, price => nil}]).
+
+call_inside_binary(Fun) ->
+    <<(Fun(1))/binary>>.
diff --git a/lib/debugger/vsn.mk b/lib/debugger/vsn.mk
index 72cedb2240..57da7e5618 100644
--- a/lib/debugger/vsn.mk
+++ b/lib/debugger/vsn.mk
@@ -1 +1 @@
-DEBUGGER_VSN = 4.2.3
+DEBUGGER_VSN = 4.2.4
diff --git a/lib/dialyzer/doc/src/notes.xml b/lib/dialyzer/doc/src/notes.xml
index 6a6e65cb94..8d11252bff 100644
--- a/lib/dialyzer/doc/src/notes.xml
+++ b/lib/dialyzer/doc/src/notes.xml
@@ -32,6 +32,55 @@
   <p>This document describes the changes made to the Dialyzer
     application.</p>
 
+<section><title>Dialyzer 3.2.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Fix bugs concerning <c>erlang:abs/1</c> and
+	    <c>erlang:bsl/2</c>. </p>
+          <p>
+	    Own Id: OTP-14858 Aux Id: ERL-551 </p>
+        </item>
+        <item>
+	    <p> Fix a bug that caused Dialyzer to crash instead of
+	    emitting a warning. </p>
+          <p>
+	    Own Id: OTP-14911</p>
+        </item>
+        <item>
+	    <p> Fix a bug concerning parameterized opaque types. </p>
+          <p>
+	    Own Id: OTP-14925 Aux Id: ERL-565 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Dialyzer 3.2.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> The error message returned from Dialyzer when, for
+	    example, a modified record field type is not a subtype of
+	    the declared type, no longer includes a call stack. The
+	    bug was introduced in Erlang/OTP 19.3. </p>
+          <p>
+	    Own Id: OTP-14742</p>
+        </item>
+        <item>
+	    <p> A bug relating to maps and never returning functions
+	    has been fixed. </p>
+          <p>
+	    Own Id: OTP-14743</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Dialyzer 3.2.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/dialyzer/src/dialyzer_analysis_callgraph.erl b/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
index a4b42c9367..9993c68fed 100644
--- a/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
+++ b/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
@@ -165,7 +165,11 @@ analysis_start(Parent, Analysis, LegalWarnings) ->
 
 remote_type_postprocessing(TmpCServer, Args) ->
   Fun = fun() ->
-            exit(remote_type_postproc(TmpCServer, Args))
+            exit(try remote_type_postproc(TmpCServer, Args) of
+                     R -> R
+                 catch
+                   throw:{error,_}=Error -> Error
+                 end)
         end,
   {Pid, Ref} = erlang:spawn_monitor(Fun),
   dialyzer_codeserver:give_away(TmpCServer, Pid),
diff --git a/lib/dialyzer/src/dialyzer_cl_parse.erl b/lib/dialyzer/src/dialyzer_cl_parse.erl
index 80c10183cf..f21eaed087 100644
--- a/lib/dialyzer/src/dialyzer_cl_parse.erl
+++ b/lib/dialyzer/src/dialyzer_cl_parse.erl
@@ -41,8 +41,8 @@ start() ->
     Ret
   catch
     throw:{dialyzer_cl_parse_error, Msg} -> {error, Msg};
-    _:R ->
-      Msg = io_lib:format("~tp\n~tp\n", [R, erlang:get_stacktrace()]),
+    _:R:S ->
+      Msg = io_lib:format("~tp\n~tp\n", [R, S]),
       {error, lists:flatten(Msg)}
   end.
 
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index e72c1aecfc..0df15e55f9 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -197,6 +197,10 @@ check_contracts(Contracts, Callgraph, FunTypes, ModOpaques) ->
 		      false ->
 			[{MFA, Contract}|NewContracts]
 		    end;
+                  {error, {extra_range, _, _}} ->
+                    %% do not treat extra range as an error in this check
+                    %% since that prevents discovering other actual errors
+                    [{MFA, Contract}|NewContracts];
 		  {error, _Error} -> NewContracts
 		end;
 	      error -> NewContracts
diff --git a/lib/dialyzer/src/dialyzer_dataflow.erl b/lib/dialyzer/src/dialyzer_dataflow.erl
index 8367432ac5..c5f93a3392 100644
--- a/lib/dialyzer/src/dialyzer_dataflow.erl
+++ b/lib/dialyzer/src/dialyzer_dataflow.erl
@@ -299,6 +299,7 @@ traverse(Tree, Map, State) ->
 	  match_fail -> t_none();
 	  raise -> t_none();
 	  bs_init_writable -> t_from_term(<<>>);
+          build_stacktrace -> erl_bif_types:type(erlang, build_stacktrace, 0);
 	  Other -> erlang:error({'Unsupported primop', Other})
 	end,
       {State, Map, Type};
@@ -1235,6 +1236,13 @@ handle_tuple(Tree, Map, State) ->
                           State2 = state__add_warning(State1, ?WARN_OPAQUE,
                                                       Tree, Msg),
                           {State2, Map1, t_none()};
+                        {error, record, ErrorPat, ErrorType, _} ->
+                          Msg = {record_match,
+                                 [format_patterns(ErrorPat),
+                                  format_type(ErrorType, State1)]},
+                          State2 = state__add_warning(State1, ?WARN_MATCHING,
+                                                      Tree, Msg),
+                          {State2, Map1, t_none()};
                         {Map2, ETypes} ->
                           {State1, Map2, t_tuple(ETypes)}
                       end
@@ -3116,7 +3124,10 @@ state__add_warning(#state{warnings = Warnings, warning_mode = true} = State,
 state__remove_added_warnings(OldState, NewState) ->
   #state{warnings = OldWarnings} = OldState,
   #state{warnings = NewWarnings} = NewState,
-  {NewWarnings -- OldWarnings, NewState#state{warnings = OldWarnings}}.
+  case NewWarnings =:= OldWarnings of
+    true -> {[], NewState};
+    false -> {NewWarnings -- OldWarnings, NewState#state{warnings = OldWarnings}}
+  end.
 
 state__add_warnings(Warns, #state{warnings = Warnings} = State) ->
   State#state{warnings = Warns ++ Warnings}.
@@ -3433,19 +3444,19 @@ state__fun_info(Fun, #state{callgraph = CG, fun_tab = FunTab, plt = PLT}) ->
   {Fun, Sig, Contract, LocalRet}.
 
 forward_args(Fun, ArgTypes, #state{work = Work, fun_tab = FunTab} = State) ->
-  {OldArgTypes, OldOut, Fixpoint} =
+  {NewArgTypes, OldOut, Fixpoint} =
     case dict:find(Fun, FunTab) of
-      {ok, {not_handled, {OldArgTypes0, OldOut0}}} ->
-	{OldArgTypes0, OldOut0, false};
+      {ok, {not_handled, {_OldArgTypesAreNone, OldOut0}}} ->
+	{ArgTypes, OldOut0, false};
       {ok, {OldArgTypes0, OldOut0}} ->
-	{OldArgTypes0, OldOut0,
-	 t_is_subtype(t_product(ArgTypes), t_product(OldArgTypes0))}
+        NewArgTypes0 = [t_sup(X, Y) ||
+                         {X, Y} <- lists:zip(ArgTypes, OldArgTypes0)],
+	{NewArgTypes0, OldOut0,
+         t_is_equal(t_product(NewArgTypes0), t_product(OldArgTypes0))}
     end,
   case Fixpoint of
     true -> State;
     false ->
-      NewArgTypes = [t_sup(X, Y) ||
-                      {X, Y} <- lists:zip(ArgTypes, OldArgTypes)],
       NewWork = add_work(Fun, Work),
       ?debug("~tw: forwarding args ~ts\n",
 	     [state__lookup_name(Fun, State),
diff --git a/lib/dialyzer/src/dialyzer_plt.erl b/lib/dialyzer/src/dialyzer_plt.erl
index 95c8b5ebce..2af4534396 100644
--- a/lib/dialyzer/src/dialyzer_plt.erl
+++ b/lib/dialyzer/src/dialyzer_plt.erl
@@ -531,17 +531,19 @@ compute_md5_from_files(Files) ->
   lists:keysort(1, [{F, compute_md5_from_file(F)} || F <- Files]).
 
 compute_md5_from_file(File) ->
-  case filelib:is_regular(File) of
-    false ->
+  case beam_lib:all_chunks(File) of
+    {ok, _, Chunks} ->
+      %% We cannot use beam_lib:md5 because it does not consider
+      %% the debug_info chunk, where typespecs are likely stored.
+      %% So we consider almost all chunks except the useless ones.
+      Filtered = [[ID, Chunk] || {ID, Chunk} <- Chunks, ID =/= "CInf", ID =/= "Docs"],
+      erlang:md5(lists:sort(Filtered));
+    {error, beam_lib, {file_error, _, enoent}} ->
       Msg = io_lib:format("Not a regular file: ~ts\n", [File]),
       throw({dialyzer_error, Msg});
-    true ->
-      case dialyzer_utils:get_core_from_beam(File) of
-	{error, Error} ->
-	  throw({dialyzer_error, Error});
-	{ok, Core} ->
-	  erlang:md5(term_to_binary(Core))
-      end
+    {error, beam_lib, _} ->
+      Msg = io_lib:format("Could not compute MD5 for .beam: ~ts\n", [File]),
+      throw({dialyzer_error, Msg})
   end.
 
 init_diff_list(RemoveFiles, AddFiles) ->
diff --git a/lib/dialyzer/src/dialyzer_typesig.erl b/lib/dialyzer/src/dialyzer_typesig.erl
index c4d8f45447..dede475f98 100644
--- a/lib/dialyzer/src/dialyzer_typesig.erl
+++ b/lib/dialyzer/src/dialyzer_typesig.erl
@@ -41,7 +41,7 @@
 	 t_is_float/1, t_is_fun/1,
 	 t_is_integer/1, t_non_neg_integer/0,
 	 t_is_list/1, t_is_nil/1, t_is_none/1, t_is_number/1,
-	 t_is_singleton/1,
+	 t_is_singleton/1, t_is_none_or_unit/1,
 
          t_limit/2, t_list/0, t_list/1,
 	 t_list_elements/1, t_nonempty_list/1, t_maybe_improper_list/0,
@@ -418,6 +418,11 @@ traverse(Tree, DefinedVars, State) ->
 	match_fail -> throw(error);
 	raise -> throw(error);
 	bs_init_writable -> {State, t_from_term(<<>>)};
+	build_stacktrace ->
+          V = mk_var(Tree),
+          Type = erl_bif_types:type(erlang, build_stacktrace, 0),
+          State1 = state__store_conj(V, sub, Type, State),
+          {State1, V};
 	Other -> erlang:error({'Unsupported primop', Other})
       end;
     'receive' ->
@@ -528,13 +533,14 @@ traverse(Tree, DefinedVars, State) ->
 		    false -> t_any();
 		    true ->
 		      MT = t_inf(lookup_type(MapVar, Map), t_map()),
-		      case t_is_none(MT) of
+		      case t_is_none_or_unit(MT) of
 			true -> t_none();
 			false ->
 			  DisjointFromKeyType =
 			    fun(ShadowKey) ->
-				t_is_none(t_inf(lookup_type(ShadowKey, Map),
-						KeyType))
+                                ST = t_inf(lookup_type(ShadowKey, Map),
+                                           KeyType),
+				t_is_none_or_unit(ST)
 			    end,
 			  case lists:all(DisjointFromKeyType, ShadowKeys) of
 			    true -> t_map_get(KeyType, MT);
@@ -567,7 +573,8 @@ traverse(Tree, DefinedVars, State) ->
 			  case cerl:is_literal(OpTree) andalso
 			    cerl:concrete(OpTree) =:= exact of
 			    true ->
-			      case t_is_none(t_inf(ShadowedKeys, KeyType)) of
+                              ST = t_inf(ShadowedKeys, KeyType),
+                              case t_is_none_or_unit(ST) of
 				true ->
 				  t_map_put({KeyType, t_any()}, AccType);
 				false ->
@@ -1893,9 +1900,8 @@ solver(Solver, SolveFun) ->
       ?debug("Solver ~w returned unexpected result:\n  ~P\n",
              [Solver, _R, 60]),
       throw(error)
-  catch E:R ->
-      io:format("Solver ~w failed: ~w:~p\n ~tp\n",
-                [Solver, E, R, erlang:get_stacktrace()]),
+  catch E:R:S ->
+      io:format("Solver ~w failed: ~w:~p\n ~tp\n", [Solver, E, R, S]),
       throw(error)
   end.
 
diff --git a/lib/dialyzer/src/typer.erl b/lib/dialyzer/src/typer.erl
index 16b9c8a94a..9d3d9ce438 100644
--- a/lib/dialyzer/src/typer.erl
+++ b/lib/dialyzer/src/typer.erl
@@ -164,9 +164,9 @@ get_type_info(#analysis{callgraph = CallGraph,
                                                      CodeServer),
     Analysis#analysis{callgraph = StrippedCallGraph, trust_plt = NewPlt}
   catch
-    error:What ->
+    error:What:Stacktrace ->
       fatal_error(io_lib:format("Analysis failed with message: ~tp",
-				[{What, erlang:get_stacktrace()}]));
+				[{What, Stacktrace}]));
     throw:{dialyzer_succ_typing_error, Msg} ->
       fatal_error(io_lib:format("Analysis failed with message: ~ts", [Msg]))
   end.
diff --git a/lib/dialyzer/test/behaviour_SUITE_data/src/proper/proper_typeserver.erl b/lib/dialyzer/test/behaviour_SUITE_data/src/proper/proper_typeserver.erl
index b16075763f..12f6532c0c 100644
--- a/lib/dialyzer/test/behaviour_SUITE_data/src/proper/proper_typeserver.erl
+++ b/lib/dialyzer/test/behaviour_SUITE_data/src/proper/proper_typeserver.erl
@@ -539,7 +539,7 @@ apply_spec_test({Mod,Fun,_Arity}=MFA, {_Domain,Range}, SpecTimeout, FalsePositiv
                      try apply(Mod, Fun, Args) of
                          X -> {ok, X}
                      catch
-                         X:Y -> {X, Y}
+                         X:Y:S -> {{X, Y}, S}
                      end,
                  case Result of
                      {ok, Z} ->
@@ -551,15 +551,15 @@ apply_spec_test({Mod,Fun,_Arity}=MFA, {_Domain,Range}, SpecTimeout, FalsePositiv
                              false ->
                                  false
                          end;
-                     Exception when is_function(FalsePositiveMFAs) ->
+                     {Exception, S2} when is_function(FalsePositiveMFAs) ->
                          case FalsePositiveMFAs(MFA, Args, Exception) of
                              true ->
                                  true;
                              false ->
-                                 error(Exception, erlang:get_stacktrace())
+                                 error(Exception, S2)
                          end;
-                     Exception ->
-                         error(Exception, erlang:get_stacktrace())
+                     {Exception, S3} ->
+                         error(Exception, S3)
                  end
              end).
 
diff --git a/lib/dialyzer/test/map_SUITE_data/results/map_anon_fun b/lib/dialyzer/test/map_SUITE_data/results/map_anon_fun
new file mode 100644
index 0000000000..cfca5b1407
--- /dev/null
+++ b/lib/dialyzer/test/map_SUITE_data/results/map_anon_fun
@@ -0,0 +1,2 @@
+
+map_anon_fun.erl:4: Function g/1 will never be called
diff --git a/lib/dialyzer/test/map_SUITE_data/src/map_anon_fun.erl b/lib/dialyzer/test/map_SUITE_data/src/map_anon_fun.erl
new file mode 100644
index 0000000000..e77016d68a
--- /dev/null
+++ b/lib/dialyzer/test/map_SUITE_data/src/map_anon_fun.erl
@@ -0,0 +1,9 @@
+-module(map_anon_fun).
+
+%% Not exported.
+g(A) ->
+    maps:map(fun F(K, {V, _C}) ->
+                    F(K, V);
+                 F(_K, _V) ->
+                    #{ system => {A} }
+            end, #{}).
diff --git a/lib/dialyzer/test/opaque_SUITE_data/src/para_bug/same.erl b/lib/dialyzer/test/opaque_SUITE_data/src/para_bug/same.erl
new file mode 100644
index 0000000000..44149f4199
--- /dev/null
+++ b/lib/dialyzer/test/opaque_SUITE_data/src/para_bug/same.erl
@@ -0,0 +1,15 @@
+-module(same).
+
+-export([baz/1]).
+
+-record(bar, {
+          a :: same_type:st(integer()),
+          b :: same_type:st(atom())
+         }).
+
+baz(Bar) ->
+    _ = wrap_find(0, Bar#bar.a),
+    wrap_find(0, Bar#bar.b).
+
+wrap_find(K, D) ->
+  same_type:t(K, D).
diff --git a/lib/dialyzer/test/opaque_SUITE_data/src/para_bug/same_type.erl b/lib/dialyzer/test/opaque_SUITE_data/src/para_bug/same_type.erl
new file mode 100644
index 0000000000..855a5d30be
--- /dev/null
+++ b/lib/dialyzer/test/opaque_SUITE_data/src/para_bug/same_type.erl
@@ -0,0 +1,13 @@
+-module(same_type).
+
+-export([t/2]).
+
+-export_type([st/1]).
+
+%% When unopaqued all specializations of st/1 are equal.
+-opaque st(_A) :: {st, tuple()}.
+
+-spec t(_, st(_)) -> _.
+
+t(K, V) ->
+    {K, V}.
diff --git a/lib/dialyzer/test/opaque_SUITE_data/src/proper/proper_typeserver.erl b/lib/dialyzer/test/opaque_SUITE_data/src/proper/proper_typeserver.erl
index 1677b4efb8..529f9fba72 100644
--- a/lib/dialyzer/test/opaque_SUITE_data/src/proper/proper_typeserver.erl
+++ b/lib/dialyzer/test/opaque_SUITE_data/src/proper/proper_typeserver.erl
@@ -533,7 +533,7 @@ apply_spec_test({Mod,Fun,_Arity}=MFA, {_Domain,Range}, SpecTimeout, FalsePositiv
                      try apply(Mod,Fun,Args) of
                          X -> {ok, X}
                      catch
-                         X:Y -> {X, Y}
+                         X:Y:S -> {{X, Y}, S}
                      end,
                  case Result of
                      {ok, Z} ->
@@ -545,15 +545,15 @@ apply_spec_test({Mod,Fun,_Arity}=MFA, {_Domain,Range}, SpecTimeout, FalsePositiv
                              false ->
                                  false
                          end;
-                     Exception when is_function(FalsePositiveMFAs) ->
+                     {Exception, S2} when is_function(FalsePositiveMFAs) ->
                          case FalsePositiveMFAs(MFA, Args, Exception) of
                              true ->
                                  true;
                              false ->
-                                 error(Exception, erlang:get_stacktrace())
+                                 error(Exception, S2)
                          end;
-                     Exception ->
-                         error(Exception, erlang:get_stacktrace())
+                     {Exception, S3} ->
+                         error(Exception, S3)
                  end
              end).
 
diff --git a/lib/dialyzer/test/options1_SUITE_data/src/compiler/beam_validator.erl b/lib/dialyzer/test/options1_SUITE_data/src/compiler/beam_validator.erl
index 8fe43163f6..ea92613781 100644
--- a/lib/dialyzer/test/options1_SUITE_data/src/compiler/beam_validator.erl
+++ b/lib/dialyzer/test/options1_SUITE_data/src/compiler/beam_validator.erl
@@ -174,7 +174,7 @@ validate_error(Error, Name, Ar) ->
 -endif.
 validate_error_1(Error, Name, Ar) ->
     {{'_',Name,Ar},
-     {internal_error,'_',{Error,erlang:get_stacktrace()}}}.
+     {internal_error,'_',{Error,[]}}}.
 
 -record(st,				%Emulation state
 	{x=init_regs(0, term),		%x register info.
diff --git a/lib/dialyzer/test/plt_SUITE.erl b/lib/dialyzer/test/plt_SUITE.erl
index ebe79b2a6d..680f5b5088 100644
--- a/lib/dialyzer/test/plt_SUITE.erl
+++ b/lib/dialyzer/test/plt_SUITE.erl
@@ -9,14 +9,14 @@
 -export([suite/0, all/0, build_plt/1, beam_tests/1, update_plt/1,
          local_fun_same_as_callback/1,
          remove_plt/1, run_plt_check/1, run_succ_typings/1,
-         bad_dialyzer_attr/1, merge_plts/1]).
+         bad_dialyzer_attr/1, merge_plts/1, bad_record_type/1]).
 
 suite() ->
   [{timetrap, ?plt_timeout}].
 
 all() -> [build_plt, beam_tests, update_plt, run_plt_check,
           remove_plt, run_succ_typings, local_fun_same_as_callback,
-          bad_dialyzer_attr, merge_plts].
+          bad_dialyzer_attr, merge_plts, bad_record_type].
 
 build_plt(Config) ->
   OutDir = ?config(priv_dir, Config),
@@ -283,8 +283,8 @@ bad_dialyzer_attr(Config) ->
     {dialyzer_error,
      "Analysis failed with error:\n" ++ Str1} =
         (catch dialyzer:run(Opts)),
-    P1 = string:str(Str1, "dial.erl:2: function undef/0 undefined"),
-    true = P1 > 0,
+    S1 = string:find(Str1, "dial.erl:2: function undef/0 undefined"),
+    true = is_list(S1),
 
     Prog2 = <<"-module(dial).
                -dialyzer({no_return, [{undef,1,2}]}).">>,
@@ -292,9 +292,9 @@ bad_dialyzer_attr(Config) ->
     {dialyzer_error,
      "Analysis failed with error:\n" ++ Str2} =
         (catch dialyzer:run(Opts)),
-    P2 = string:str(Str2, "dial.erl:2: badly formed dialyzer "
-                          "attribute: {no_return,{undef,1,2}}"),
-    true = P2 > 0,
+    S2 = string:find(Str2, "dial.erl:2: badly formed dialyzer "
+                           "attribute: {no_return,{undef,1,2}}"),
+    true = is_list(S2),
 
     ok.
 
@@ -369,6 +369,32 @@ create_plts(Mod1, Mod2, Config) ->
 
 %% End of merge_plts().
 
+bad_record_type(Config) ->
+    PrivDir = ?config(priv_dir, Config),
+    Source = lists:concat([bad_record_type, ".erl"]),
+    Filename = filename:join(PrivDir, Source),
+    PltFilename = dialyzer_common:plt_file(PrivDir),
+
+    Opts = [{files, [Filename]},
+            {check_plt, false},
+            {from, src_code},
+            {init_plt, PltFilename}],
+
+    Prog = <<"-module(bad_record_type).
+              -export([r/0]).
+              -record(r, {f = 3 :: integer()}).
+              -spec r() -> #r{f :: atom()}.
+              r() ->
+                  #r{}.">>,
+    ok = file:write_file(Filename, Prog),
+    {dialyzer_error,
+     "Analysis failed with error:\n" ++ Str} =
+        (catch dialyzer:run(Opts)),
+    P = string:str(Str,
+                    "bad_record_type.erl:4: Illegal declaration of #r{f}"),
+    true = P > 0,
+    ok.
+
 erlang_beam() ->
     case code:where_is_file("erlang.beam") of
         non_existing ->
diff --git a/lib/dialyzer/test/r9c_SUITE_data/src/mnesia/mnesia_tm.erl b/lib/dialyzer/test/r9c_SUITE_data/src/mnesia/mnesia_tm.erl
index 09e310530d..af49ceff72 100644
--- a/lib/dialyzer/test/r9c_SUITE_data/src/mnesia/mnesia_tm.erl
+++ b/lib/dialyzer/test/r9c_SUITE_data/src/mnesia/mnesia_tm.erl
@@ -2051,7 +2051,7 @@ display_pid_info(Pid) ->
 			   Other
 		   end,
 	    Reds  = fetch(reductions, Info),
-	    LM = length(fetch(messages, Info)),
+	    LM = fetch(message_queue_len, Info),
 	    pformat(io_lib:format("~p", [Pid]),
 		    io_lib:format("~p", [Call]),
 		    io_lib:format("~p", [Curr]), Reds, LM)
diff --git a/lib/dialyzer/test/small_SUITE_data/results/chars b/lib/dialyzer/test/small_SUITE_data/results/chars
index 2c1f8f8d17..72fbdb4528 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/chars
+++ b/lib/dialyzer/test/small_SUITE_data/results/chars
@@ -1,4 +1,4 @@
 
-chars.erl:29: Invalid type specification for function chars:f/1. The success typing is (#{'b':=50}) -> 'ok'
-chars.erl:32: Function t1/0 has no local return
-chars.erl:32: The call chars:f(#{'b':=50}) breaks the contract (#{'a':=49,'b'=>50,'c'=>51}) -> 'ok'
+chars.erl:37: Invalid type specification for function chars:f/1. The success typing is (#{'b':=50}) -> 'ok'
+chars.erl:40: Function t1/0 has no local return
+chars.erl:40: The call chars:f(#{'b':=50}) breaks the contract (#{'a':=49,'b'=>50,'c'=>51}) -> 'ok'
diff --git a/lib/dialyzer/test/small_SUITE_data/results/extra_range b/lib/dialyzer/test/small_SUITE_data/results/extra_range
new file mode 100644
index 0000000000..ec50c95c4e
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/results/extra_range
@@ -0,0 +1,4 @@
+
+extra_range.erl:29: The pattern 'ok' can never match the type 'error'
+extra_range.erl:43: The pattern 'no' can never match the type 'maybe' | 'yes'
+extra_range.erl:58: The pattern 'maybe' can never match the type 'no' | 'yes'
diff --git a/lib/dialyzer/test/small_SUITE_data/results/fun_arity b/lib/dialyzer/test/small_SUITE_data/results/fun_arity
index e916b2483f..8b7a538758 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/fun_arity
+++ b/lib/dialyzer/test/small_SUITE_data/results/fun_arity
@@ -1,37 +1,37 @@
 
-fun_arity.erl:100: Fun application will fail since _@c1 :: fun(() -> any()) is not a function of arity 1
+fun_arity.erl:100: Fun application will fail since _1 :: fun(() -> any()) is not a function of arity 1
 fun_arity.erl:100: Function 'Mfa_0_ko'/1 has no local return
-fun_arity.erl:104: Fun application will fail since _@c1 :: fun((_) -> any()) is not a function of arity 0
+fun_arity.erl:104: Fun application will fail since _1 :: fun((_) -> any()) is not a function of arity 0
 fun_arity.erl:104: Function 'Mfa_1_ko'/1 has no local return
-fun_arity.erl:111: Fun application will fail since _@c1 :: fun(() -> any()) is not a function of arity 1
+fun_arity.erl:111: Fun application will fail since _1 :: fun(() -> any()) is not a function of arity 1
 fun_arity.erl:111: Function mFa_0_ko/1 has no local return
-fun_arity.erl:115: Fun application will fail since _@c1 :: fun((_) -> any()) is not a function of arity 0
+fun_arity.erl:115: Fun application will fail since _1 :: fun((_) -> any()) is not a function of arity 0
 fun_arity.erl:115: Function mFa_1_ko/1 has no local return
-fun_arity.erl:122: Fun application will fail since _@c2 :: fun(() -> any()) is not a function of arity 1
+fun_arity.erl:122: Fun application will fail since _2 :: fun(() -> any()) is not a function of arity 1
 fun_arity.erl:122: Function 'MFa_0_ko'/2 has no local return
-fun_arity.erl:126: Fun application will fail since _@c2 :: fun((_) -> any()) is not a function of arity 0
+fun_arity.erl:126: Fun application will fail since _2 :: fun((_) -> any()) is not a function of arity 0
 fun_arity.erl:126: Function 'MFa_1_ko'/2 has no local return
-fun_arity.erl:35: Fun application will fail since _@c0 :: fun(() -> 'ok') is not a function of arity 1
+fun_arity.erl:35: Fun application will fail since _0 :: fun(() -> 'ok') is not a function of arity 1
 fun_arity.erl:35: Function f_0_ko/0 has no local return
-fun_arity.erl:39: Fun application will fail since _@c0 :: fun((_) -> 'ok') is not a function of arity 0
+fun_arity.erl:39: Fun application will fail since _0 :: fun((_) -> 'ok') is not a function of arity 0
 fun_arity.erl:39: Function f_1_ko/0 has no local return
-fun_arity.erl:48: Fun application will fail since _@c0 :: fun(() -> 'ok') is not a function of arity 1
+fun_arity.erl:48: Fun application will fail since _0 :: fun(() -> 'ok') is not a function of arity 1
 fun_arity.erl:48: Function fa_0_ko/0 has no local return
-fun_arity.erl:53: Fun application will fail since _@c0 :: fun((_) -> 'ok') is not a function of arity 0
+fun_arity.erl:53: Fun application will fail since _0 :: fun((_) -> 'ok') is not a function of arity 0
 fun_arity.erl:53: Function fa_1_ko/0 has no local return
-fun_arity.erl:63: Fun application will fail since _@c0 :: fun(() -> any()) is not a function of arity 1
+fun_arity.erl:63: Fun application will fail since _0 :: fun(() -> any()) is not a function of arity 1
 fun_arity.erl:63: Function mfa_0_ko/0 has no local return
-fun_arity.erl:68: Fun application will fail since _@c0 :: fun((_) -> any()) is not a function of arity 0
+fun_arity.erl:68: Fun application will fail since _0 :: fun((_) -> any()) is not a function of arity 0
 fun_arity.erl:68: Function mfa_1_ko/0 has no local return
-fun_arity.erl:76: Fun application will fail since _@c0 :: fun(() -> any()) is not a function of arity 1
+fun_arity.erl:76: Fun application will fail since _0 :: fun(() -> any()) is not a function of arity 1
 fun_arity.erl:76: Function mfa_ne_0_ko/0 has no local return
 fun_arity.erl:78: Function mf_ne/0 will never be called
-fun_arity.erl:81: Fun application will fail since _@c0 :: fun((_) -> any()) is not a function of arity 0
+fun_arity.erl:81: Fun application will fail since _0 :: fun((_) -> any()) is not a function of arity 0
 fun_arity.erl:81: Function mfa_ne_1_ko/0 has no local return
 fun_arity.erl:83: Function mf_ne/1 will never be called
-fun_arity.erl:89: Fun application will fail since _@c0 :: fun(() -> any()) is not a function of arity 1
+fun_arity.erl:89: Fun application will fail since _0 :: fun(() -> any()) is not a function of arity 1
 fun_arity.erl:89: Function mfa_nd_0_ko/0 has no local return
 fun_arity.erl:90: Call to missing or unexported function fun_arity:mf_nd/0
-fun_arity.erl:93: Fun application will fail since _@c0 :: fun((_) -> any()) is not a function of arity 0
+fun_arity.erl:93: Fun application will fail since _0 :: fun((_) -> any()) is not a function of arity 0
 fun_arity.erl:93: Function mfa_nd_1_ko/0 has no local return
 fun_arity.erl:94: Call to missing or unexported function fun_arity:mf_nd/1
diff --git a/lib/dialyzer/test/small_SUITE_data/results/maps_sum b/lib/dialyzer/test/small_SUITE_data/results/maps_sum
index bd192bdb93..b29ac77d88 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/maps_sum
+++ b/lib/dialyzer/test/small_SUITE_data/results/maps_sum
@@ -1,4 +1,4 @@
 
-maps_sum.erl:15: Invalid type specification for function maps_sum:wrong1/1. The success typing is (map()) -> any()
+maps_sum.erl:15: Invalid type specification for function maps_sum:wrong1/1. The success typing is (maps:iterator() | map()) -> any()
 maps_sum.erl:26: Function wrong2/1 has no local return
 maps_sum.erl:27: The call lists:foldl(fun((_,_,_) -> any()),0,Data::any()) will never return since it differs in the 1st argument from the success typing arguments: (fun((_,_) -> any()),any(),[any()])
diff --git a/lib/dialyzer/test/small_SUITE_data/results/record_match b/lib/dialyzer/test/small_SUITE_data/results/record_match
new file mode 100644
index 0000000000..a0dd6f560a
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/results/record_match
@@ -0,0 +1,3 @@
+
+record_match.erl:16: Function select/0 has no local return
+record_match.erl:17: Matching of pattern {'b_literal', 'undefined'} tagged with a record name violates the declared type of #b_local{} | #b_remote{}
diff --git a/lib/dialyzer/test/small_SUITE_data/results/stacktrace b/lib/dialyzer/test/small_SUITE_data/results/stacktrace
new file mode 100644
index 0000000000..fd60881953
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/results/stacktrace
@@ -0,0 +1,5 @@
+
+stacktrace.erl:11: The pattern {'a', 'b'} can never match the type [{atom(),atom(),[any()] | byte(),[{'file',string()} | {'line',pos_integer()}]}]
+stacktrace.erl:19: The pattern ['a', 'b'] can never match the type [{atom(),atom(),[any()] | byte(),[{'file',string()} | {'line',pos_integer()}]}]
+stacktrace.erl:44: The pattern {'a', 'b'} can never match the type [{atom(),atom(),[any()] | byte(),[{'file',string()} | {'line',pos_integer()}]}]
+stacktrace.erl:53: The pattern ['a', 'b'] can never match the type [{atom(),atom(),[any()] | byte(),[{'file',string()} | {'line',pos_integer()}]}]
diff --git a/lib/dialyzer/test/small_SUITE_data/src/abs.erl b/lib/dialyzer/test/small_SUITE_data/src/abs.erl
index 251e24cdfc..0e38c3dbb7 100644
--- a/lib/dialyzer/test/small_SUITE_data/src/abs.erl
+++ b/lib/dialyzer/test/small_SUITE_data/src/abs.erl
@@ -5,7 +5,7 @@
 -export([t/0]).
 
 t() ->
-    Fs = [fun i1/0, fun i2/0, fun i3/0, fun i4/0, fun f1/0],
+    Fs = [fun i1/0, fun i2/0, fun i3/0, fun i4/0, fun f1/0, fun erl_551/0],
     _ = [catch F() || F <- Fs],
     ok.
 
@@ -60,6 +60,13 @@ f1() ->
 f1(A) ->
     abs(A).
 
+erl_551() ->
+    accept(9),
+    accept(-3).
+
+accept(Number) when abs(Number) >= 8 -> first;
+accept(_Number) -> second.
+
 -spec int() -> integer().
 
 int() ->
diff --git a/lib/dialyzer/test/small_SUITE_data/src/bsL.erl b/lib/dialyzer/test/small_SUITE_data/src/bsL.erl
new file mode 100644
index 0000000000..b2fdc16324
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/bsL.erl
@@ -0,0 +1,13 @@
+-module(bsL).
+
+-export([t/0]).
+
+%% Found in lib/observer/test/crashdump_helper.erl.
+
+t() ->
+    Size = 60,
+    <<H:16/unit:8>> = erlang:md5(<<Size:32>>),
+    true = H < 20,
+    true = H > 2,
+    Data = ((H bsl (8*150)) div (H+7919)),
+    <<Data:Size/unit:8>>.
diff --git a/lib/dialyzer/test/small_SUITE_data/src/chars.erl b/lib/dialyzer/test/small_SUITE_data/src/chars.erl
index 1e9c8ab6b9..62b90cf54d 100644
--- a/lib/dialyzer/test/small_SUITE_data/src/chars.erl
+++ b/lib/dialyzer/test/small_SUITE_data/src/chars.erl
@@ -12,17 +12,25 @@
 -spec t() -> $0-$0..$9-$0| $?.
 
 t() ->
-    c(#r{f = $z - 3}),
+    r(#r{f = $z - 3}),
+    r(#r{f = 97}),
+    c($/),
     c($z - 3),
     c($B).
 
 -spec c(cs()) -> $3-$0..$9-$0.
-
-c($A + 1) -> 2;
+c($A + 1) -> $9-$0;
 c(C) ->
     case C of
-        $z - 3 -> 3;
-        #r{f = $z - 3} -> 7
+        $z - 3 -> $3-$0;
+        _ -> $7-$0
+    end.
+
+-spec r(#r{f :: $a..$z}) -> ok | error.
+r(R) ->
+    case R of
+        #r{f = $z - 3} -> error;
+        _ -> ok
     end.
 
 %% Display contract with character in warning:
diff --git a/lib/dialyzer/test/small_SUITE_data/src/erl_tar_table.erl b/lib/dialyzer/test/small_SUITE_data/src/erl_tar_table.erl
new file mode 100644
index 0000000000..2dc00d272a
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/erl_tar_table.erl
@@ -0,0 +1,14 @@
+-module(erl_tar_table).
+
+%% OTP-14860, PR 1670.
+
+-export([t/0, v/0, x/0]).
+
+t() ->
+    {ok, ["file"]} = erl_tar:table("table.tar").
+
+v() ->
+    {ok, [{_,_,_,_,_,_,_}]} = erl_tar:table("table.tar", [verbose]).
+
+x() ->
+    {ok, ["file"]} = erl_tar:table("table.tar", []).
diff --git a/lib/dialyzer/test/small_SUITE_data/src/extra_range.erl b/lib/dialyzer/test/small_SUITE_data/src/extra_range.erl
new file mode 100644
index 0000000000..9d6ba89c95
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/extra_range.erl
@@ -0,0 +1,59 @@
+%% Test that a spec containing more items than actually returned
+%% (whether by accident or by benign overspeccing) does not prevent
+%% detection of impossible matches.
+
+-module(extra_range).
+
+-export([t1/2, t2/2, t3/2, t4/2]).
+
+-dialyzer([no_return]).
+
+%% this spec matches the behaviour of the code
+-spec normal(integer()) -> ok | error.
+normal(1) -> ok;
+normal(2) -> error.
+
+t1(X, Y) when is_integer(X), is_integer(Y) ->
+    ok = normal(X),
+    error = normal(Y),
+    ok.
+
+
+%% this spec has a typo, which should cause anyone trying to match on
+%% `ok = typo(X)' to get a warning, because `ok' is not in the spec
+-spec typo(integer()) -> ook | error.
+typo(1) -> ok;
+typo(2) -> error.
+
+t2(X, Y) when is_integer(X), is_integer(Y) ->
+    ok = typo(X),  % warning expected - not allowed according to spec
+    error = typo(Y),
+    ok.
+
+
+%% this is overspecified, and should cause a warning for trying
+%% to match on `no = over(X)', because it cannot succeed and either
+%% the spec should be updated or the code should be extended
+-spec over(integer()) -> yes | no | maybe.
+over(1) -> yes;
+over(_) -> maybe.
+
+t3(X, Y) when is_integer(X), is_integer(Y) ->
+    yes = over(X),
+    no = over(Y),  % warning expected - spec or code needs fixing
+    maybe = over(X + Y),
+    ok.
+
+
+%% this is underspecified, which should cause anyone trying to match on
+%% `maybe = under(X)' to get a warning, because `maybe' is not in the spec
+-spec under(integer()) -> yes | no.
+under(1) -> yes;
+under(2) -> no;
+under(_) -> maybe.
+
+t4(X, Y) when is_integer(X), is_integer(Y) ->
+    yes = under(X),
+    no = under(Y),
+    maybe = under(X + Y), % warning expected - not in spec
+    ok.
diff --git a/lib/dialyzer/test/small_SUITE_data/src/record_match.erl b/lib/dialyzer/test/small_SUITE_data/src/record_match.erl
new file mode 100644
index 0000000000..8e9b91937f
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/record_match.erl
@@ -0,0 +1,17 @@
+-module(record_match).
+
+-export([select/0]).
+
+-record(b_literal, {val}).
+-record(b_remote, {mod,name,arity}).
+-record(b_local, {name,arity}).
+
+-type b_remote()   :: #b_remote{}.
+-type b_local()    :: #b_local{}.
+
+-type argument()   :: b_remote() | b_local().
+
+-record(b_set, {args=[] :: [argument()]}).
+
+select() ->
+    #b_set{args=[#b_remote{},#b_literal{}]}.
diff --git a/lib/dialyzer/test/small_SUITE_data/src/stacktrace.erl b/lib/dialyzer/test/small_SUITE_data/src/stacktrace.erl
new file mode 100644
index 0000000000..de79e710e9
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/stacktrace.erl
@@ -0,0 +1,73 @@
+-module(stacktrace).
+
+%% Check the stacktrace variable introduced in Erlang/OTP 21.0
+
+-export([t1/0, t2/0, t3/0, t4/0, s1/0, s2/0, s3/0, s4/0]).
+
+t1() ->
+    try foo:bar()
+    catch
+        E:P:S ->
+            {a,b} = S, % can never match
+            {E, P}
+    end.
+
+t2() ->
+    try foo:bar()
+    catch
+        E:P:S ->
+            [a,b] = S, % can never match
+            {E, P}
+    end.
+
+t3() ->
+    try foo:bar()
+    catch
+        E:P:S ->
+            [{m,f,[],[]}] = S,
+            {E, P}
+    end.
+
+t4() ->
+    try foo:bar()
+    catch
+        E:P:S ->
+            [{m,f,1,[{file,"tjo"},{line,95}]}] = S,
+            {E, P}
+    end.
+
+s1() ->
+    try foo:bar()
+    catch
+        E:P ->
+            S = erlang:get_stacktrace(),
+            {a,b} = S, % can never match
+            {E, P}
+    end.
+
+s2() ->
+    try foo:bar()
+    catch
+        E:P ->
+            S = erlang:get_stacktrace(),
+            [a,b] = S, % can never match
+            {E, P}
+    end.
+
+s3() ->
+    try foo:bar()
+    catch
+        E:P ->
+            S = erlang:get_stacktrace(),
+            [{m,f,[],[]}] = S,
+            {E, P}
+    end.
+
+s4() ->
+    try foo:bar()
+    catch
+        E:P ->
+            S = erlang:get_stacktrace(),
+            [{m,f,1,[{file,"tjo"},{line,95}]}] = S,
+            {E, P}
+    end.
diff --git a/lib/dialyzer/vsn.mk b/lib/dialyzer/vsn.mk
index d130b14fec..fa58adc2db 100644
--- a/lib/dialyzer/vsn.mk
+++ b/lib/dialyzer/vsn.mk
@@ -1 +1 @@
-DIALYZER_VSN = 3.2.2
+DIALYZER_VSN = 3.2.4
diff --git a/lib/diameter/doc/src/diameter.xml b/lib/diameter/doc/src/diameter.xml
index 6b84b22eb5..6bc7d147c0 100644
--- a/lib/diameter/doc/src/diameter.xml
+++ b/lib/diameter/doc/src/diameter.xml
@@ -1865,8 +1865,8 @@ An example return value with for a client service with Origin-Host
                                {raddr,{127,0,0,1}},
                                {rport,3868},
                                {reuseaddr,true}]}]},
-  {watchdog,{&lt;0.66.0>,{1346,171491,996448},okay}},
-  {peer,{&lt;0.67.0>,{1346,171491,999906}}},
+  {watchdog,{&lt;0.66.0>,-576460736368485571,okay}},
+  {peer,{&lt;0.67.0>,-576460736357885808}},
   {apps,[{0,common}]},
   {caps,[{origin_host,{"client.example.com","server.example.com"}},
          {origin_realm,{"example.com","example.com"}},
@@ -1946,8 +1946,8 @@ connection might look as follows.</p>
             {transport_config,[{reuseaddr,true},
                                {ip,{127,0,0,1}},
                                {port,3868}]}]},
-  {accept,[[{watchdog,{&lt;0.56.0>,{1346,171481,226895},okay}},
-            {peer,{&lt;0.58.0>,{1346,171491,999511}}},
+  {accept,[[{watchdog,{&lt;0.56.0>,-576460739249514012,okay}},
+            {peer,{&lt;0.58.0>,-576460638229179167}},
             {apps,[{0,common}]},
             {caps,[{origin_host,{"server.example.com","client.example.com"}},
                    {origin_realm,{"example.com","example.com"}},
@@ -1976,7 +1976,7 @@ connection might look as follows.</p>
                                 {send_max,148},
                                 {send_avg,87},
                                 {send_pend,0}]}]}],
-           [{watchdog,{&lt;0.72.0>,{1346,171491,998404},initial}}]]},
+           [{watchdog,{&lt;0.72.0>,-576460638229717546,initial}}]]},
   {statistics,[{{{0,280,0},recv},7},
                {{{0,280,1},send},7},
                {{{0,280,0},recv,{'Result-Code',2001}},7},
@@ -2024,8 +2024,8 @@ A return value for the server above might look as follows.</p>
             {transport_config,[{reuseaddr,true},
                                {ip,{127,0,0,1}},
                                {port,3868}]}]},
-  {watchdog,{&lt;0.56.0>,{1346,171481,226895},okay}},
-  {peer,{&lt;0.58.0>,{1346,171491,999511}}},
+  {watchdog,{&lt;0.56.0>,-576460739249514012,okay}},
+  {peer,{&lt;0.58.0>,-576460638229179167}},
   {apps,[{0,common}]},
   {caps,[{origin_host,{"server.example.com","client.example.com"}},
          {origin_realm,{"example.com","example.com"}},
diff --git a/lib/diameter/doc/src/notes.xml b/lib/diameter/doc/src/notes.xml
index 589e7d5145..fa1be39b5b 100644
--- a/lib/diameter/doc/src/notes.xml
+++ b/lib/diameter/doc/src/notes.xml
@@ -43,6 +43,65 @@ first.</p>
 
 <!-- ===================================================================== -->
 
+<section><title>diameter 2.1.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix close of diameter_tcp/sctp listening socket at
+	    diameter:remove_transport/2, that was broken in diameter
+	    2.1. A reconfigured transport could not listen on the
+	    same endpoint as a result.</p>
+          <p>
+	    Own Id: OTP-14839</p>
+        </item>
+        <item>
+          <p>
+	    Fix handling of SUSPECT connections at service
+	    termination. A connection with this watchdog state caused
+	    diameter_service:terminate/2 to fail.</p>
+          <p>
+	    Own Id: OTP-14947 Aux Id: ERIERL-124 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>diameter 2.1.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix documentation typo: peer_down/3 was written where
+	    peer_down/3 was intended.</p>
+          <p>
+	    Own Id: OTP-14805</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>diameter 2.1.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    A fault introduced in diameter 2.1 could cause decode
+	    errors to be ignored in AVPs following the header of a
+	    Grouped AVP.</p>
+          <p>
+	    Own Id: OTP-14684 Aux Id: ERIERL-85 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>diameter 2.1.1</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/diameter/doc/src/seealso.ent b/lib/diameter/doc/src/seealso.ent
index c5a53670d0..72d74c103c 100644
--- a/lib/diameter/doc/src/seealso.ent
+++ b/lib/diameter/doc/src/seealso.ent
@@ -79,7 +79,7 @@ significant.
 <!ENTITY app_handle_answer '<seealso marker="diameter_app#Mod:handle_answer-4">handle_answer/4</seealso>'>
 <!ENTITY app_handle_request '<seealso marker="diameter_app#Mod:handle_request-3">handle_request/3</seealso>'>
 <!ENTITY app_handle_error '<seealso marker="diameter_app#Mod:handle_error-4">handle_error/4</seealso>'>
-<!ENTITY app_peer_down '<seealso marker="diameter_app#Mod:peer_down-3">peer_up/3</seealso>'>
+<!ENTITY app_peer_down '<seealso marker="diameter_app#Mod:peer_down-3">peer_down/3</seealso>'>
 <!ENTITY app_peer_up '<seealso marker="diameter_app#Mod:peer_up-3">peer_up/3</seealso>'>
 <!ENTITY app_pick_peer '<seealso marker="diameter_app#Mod:pick_peer-4">pick_peer/4</seealso>'>
 <!ENTITY app_prepare_retransmit '<seealso marker="diameter_app#Mod:prepare_retransmit-3">prepare_retransmit/3</seealso>'>
diff --git a/lib/diameter/src/base/diameter_gen.erl b/lib/diameter/src/base/diameter_gen.erl
index d3b9f704fe..93ebe57685 100644
--- a/lib/diameter/src/base/diameter_gen.erl
+++ b/lib/diameter/src/base/diameter_gen.erl
@@ -320,8 +320,8 @@ decode(Bin, Code, Vid, DataLen, Pad, M, P, Name, Mod, Fmt, Strict, Opts0,
                                 index = Idx},
 
             Dec = dec(Data, Name, NameT, Mod, Fmt, Opts, Avp),
-            Acc = decode(T, Name, Mod, Fmt, Strict, Opts, Idx+1, AM),%% recurse
-            acc(Acc, Dec, I, Field, Arity, Strict, Mod, Opts);
+            Acc = decode(T, Name, Mod, Fmt, Strict, Opts0, Idx+1, AM),%% recurse
+            acc(Acc, Dec, I, Field, Arity, Strict, Mod);
         _ ->
             {NameT, _Field, _Arity, {_, AM}}
                 = incr(Name, Code, Vid, M, Mod, Strict, Opts0, AM0),
@@ -574,15 +574,17 @@ dec_AVP(Dicts, Data, Name, Mod, Fmt, Opts, #diameter_avp{code = Code,
 %% Try to decode an AVP in the first alternate dictionary that defines
 %% it.
 
-dec_AVP([Dict | Rest], Data, Name, Mod, Fmt, Opts, Code, Vid, Avp) ->
+dec_AVP([Dict | Rest], Data, Name, Mod, Fmt, Opts0, Code, Vid, Avp) ->
     case Dict:avp_name(Code, Vid) of
-        {AvpName, Type} ->
+        {AvpName, Type} = NameT ->
             A = Avp#diameter_avp{name = AvpName,
                                  type = Type},
-            #{failed_avp := Failed} = Opts,
+            #{failed_avp := Failed}
+                = Opts
+                = setopts(NameT, Name, Avp#diameter_avp.is_mandatory, Opts0),
             dec(Data, Name, AvpName, Type, Mod, Dict, Fmt, Failed, Opts, A);
         _ ->
-            dec_AVP(Rest, Data, Name, Mod, Fmt, Opts, Code, Vid, Avp)
+            dec_AVP(Rest, Data, Name, Mod, Fmt, Opts0, Code, Vid, Avp)
     end;
 
 dec_AVP([], _, _, _, _, _, _, _, Avp) ->
@@ -680,30 +682,30 @@ set_failed('Failed-AVP', #{failed_avp := false} = Opts) ->
 set_failed(_, Opts) ->
     Opts.
 
-%% acc/8
+%% acc/7
 
-acc([AM | Acc], As, I, Field, Arity, Strict, Mod, Opts) ->
-    [AM | acc1(Acc, As, I, Field, Arity, Strict, Mod, Opts)].
+acc([AM | Acc], As, I, Field, Arity, Strict, Mod) ->
+    [AM | acc1(Acc, As, I, Field, Arity, Strict, Mod)].
 
-%% acc1/8
+%% acc1/7
 
 %% Faulty AVP, not grouped.
-acc1(Acc, {_RC, Avp} = E, _, _, _, _, _, _) ->
+acc1(Acc, {_RC, Avp} = E, _, _, _, _, _) ->
     [Avps, Failed | Rec] = Acc,
     [[Avp | Avps], [E | Failed] | Rec];
 
 %% Faulty component in grouped AVP.
-acc1(Acc, {RC, As, Avp}, _, _, _, _, _, _) ->
+acc1(Acc, {RC, As, Avp}, _, _, _, _, _) ->
     [Avps, Failed | Rec] = Acc,
     [[As | Avps], [{RC, Avp} | Failed] | Rec];
 
 %% Grouped AVP ...
-acc1([Avps | Acc], [Avp|_] = As, I, Field, Arity, Strict, Mod, Opts) ->
-    [[As|Avps] | acc2(Acc, Avp, I, Field, Arity, Strict, Mod, Opts)];
+acc1([Avps | Acc], [Avp|_] = As, I, Field, Arity, Strict, Mod) ->
+    [[As|Avps] | acc2(Acc, Avp, I, Field, Arity, Strict, Mod)];
 
 %% ... or not.
-acc1([Avps | Acc], Avp, I, Field, Arity, Strict, Mod, Opts) ->
-    [[Avp|Avps] | acc2(Acc, Avp, I, Field, Arity, Strict, Mod, Opts)].
+acc1([Avps | Acc], Avp, I, Field, Arity, Strict, Mod) ->
+    [[Avp|Avps] | acc2(Acc, Avp, I, Field, Arity, Strict, Mod)].
 
 %% The component list of a Grouped AVP is discarded when packing into
 %% the record (or equivalent): the values in an 'AVP' field are
@@ -713,24 +715,24 @@ acc1([Avps | Acc], Avp, I, Field, Arity, Strict, Mod, Opts) ->
 %% retain the same structure as in diameter_packet.avps, but an 'AVP'
 %% list has always been flat.
 
-%% acc2/8
+%% acc2/7
 
 %% No errors, but nowhere to pack.
-acc2(Acc, Avp, _, 'AVP', 0, _, _, _) ->
+acc2(Acc, Avp, _, 'AVP', 0, _, _) ->
     [Failed | Rec] = Acc,
     [[{rc(Avp), Avp} | Failed] | Rec];
 
 %% Relaxed arities.
-acc2(Acc, Avp, _, Field, Arity, Strict, Mod, _)
+acc2(Acc, Avp, _, Field, Arity, Strict, Mod)
   when Strict /= decode ->
     pack(Arity, Field, Avp, Mod, Acc);
 
 %% No maximum arity.
-acc2(Acc, Avp, _, Field, {_,'*'} = Arity, _, Mod, _) ->
+acc2(Acc, Avp, _, Field, {_,'*'} = Arity, _, Mod) ->
     pack(Arity, Field, Avp, Mod, Acc);
 
 %% Or check.
-acc2(Acc, Avp, I, Field, Arity, _, Mod, _) ->
+acc2(Acc, Avp, I, Field, Arity, _, Mod) ->
     Mx = max_arity(Arity),
     if Mx =< I ->
             [Failed | Rec] = Acc,
diff --git a/lib/diameter/src/base/diameter_reg.erl b/lib/diameter/src/base/diameter_reg.erl
index 5b7cfab31a..c1762a07e3 100644
--- a/lib/diameter/src/base/diameter_reg.erl
+++ b/lib/diameter/src/base/diameter_reg.erl
@@ -246,8 +246,11 @@ handle_call({add, Uniq, Key}, {Pid, _}, S) ->
 
 handle_call({remove, Key}, {Pid, _}, S) ->
     Rec = {Key, Pid},
-    ets:delete_object(?TABLE, Rec),
-    {reply, true, notify(remove, Rec, S)};
+    {reply, true, try
+                      notify(remove, Rec, S)
+                  after
+                      ets:delete_object(?TABLE, Rec)
+                  end};
 
 handle_call({wait, Pat}, {Pid, _} = From, S) ->
     NS = add_monitor(Pid, S),
@@ -370,10 +373,12 @@ send({_,_} = From, add, Rec) ->
 
 down(Pid, #state{monitors = Ps} = S) ->
     Recs = match('_', Pid),
-    ets:match_delete(?TABLE, {'_', Pid}),
-    lists:foldl(fun(R,NS) -> notify(remove, R, NS) end,
-                flush(Pid, S#state{monitors = sets:del_element(Pid, Ps)}),
-                Recs).
+    Acc0 = flush(Pid, S#state{monitors = sets:del_element(Pid, Ps)}),
+    try
+        lists:foldl(fun(R,NS) -> notify(remove, R, NS) end, Acc0, Recs)
+    after
+        ets:match_delete(?TABLE, {'_', Pid})
+    end.
 
 %% flush/3
 
diff --git a/lib/diameter/src/base/diameter_service.erl b/lib/diameter/src/base/diameter_service.erl
index 31dd92f878..cbe66ef27a 100644
--- a/lib/diameter/src/base/diameter_service.erl
+++ b/lib/diameter/src/base/diameter_service.erl
@@ -151,7 +151,7 @@
          apps :: match([{0..16#FFFFFFFF, diameter:app_alias()}] %% {Id, Alias}
                        | [diameter:app_alias()]),               %% remote
          caps :: match(#diameter_caps{}),
-         started = diameter_lib:now(),     %% at process start or sharing
+         started = diameter_lib:now(),     %% at connection_up
          watchdog :: match(pid()           %% key into watchdogT
                            | undefined)}). %% undefined if remote
 
@@ -554,15 +554,25 @@ terminate(Reason, #state{service_name = Name, local = {PeerT, _, _}} = S) ->
     %% wait for watchdog state changes to take care of if. That this
     %% takes place after deleting the state entry ensures that the
     %% resulting failover by request processes accomplishes nothing.
-    ets:foldl(fun(#peer{pid = TPid}, _) ->
-                      diameter_traffic:peer_down(TPid)
-              end,
-              ok,
-              PeerT),
+    ets:foldl(fun peer_down/2, ok, PeerT),
 
     shutdown == Reason  %% application shutdown
         andalso shutdown(application, S).
 
+%% peer_down/1
+%%
+%% Entries with watchdog state SUSPECT are already down: ignore the
+%% expected failure. This assumes the current implementation, but
+%% double the number of lookups (in the typical case) could be the
+%% greater evil if there are many peer connections.
+
+peer_down(#peer{pid = TPid}, _) ->
+    try
+        diameter_traffic:peer_down(TPid)
+    catch
+        error: {badmatch, []} -> ok
+    end.
+
 %% ---------------------------------------------------------------------------
 %% # code_change/3
 %% ---------------------------------------------------------------------------
diff --git a/lib/diameter/src/diameter.appup.src b/lib/diameter/src/diameter.appup.src
index c2198de9ea..05a8c9378e 100644
--- a/lib/diameter/src/diameter.appup.src
+++ b/lib/diameter/src/diameter.appup.src
@@ -2,7 +2,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2010-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -54,7 +54,10 @@
   {"1.12.1",  [{restart_application, diameter}]},  %% 19.1
   {"1.12.2",  [{restart_application, diameter}]},  %% 19.3
   {"2.0",     [{restart_application, diameter}]},  %% 20.0
-  {"2.1",     [{update, diameter_reg, {advanced, "2.1"}}]} %% 20.1
+  {"2.1",     [{restart_application, diameter}]},  %% 20.1
+  {"2.1.1",   [{restart_application, diameter}]},  %% 20.1.2
+  {"2.1.2",   [{restart_application, diameter}]},  %% 20.1.3
+  {"2.1.3",   [{restart_application, diameter}]}   %% 20.2
  ],
  [
   {"0.9",     [{restart_application, diameter}]},
@@ -90,6 +93,9 @@
   {"1.12.1",  [{restart_application, diameter}]},
   {"1.12.2",  [{restart_application, diameter}]},
   {"2.0",     [{restart_application, diameter}]},
-  {"2.1",     [{restart_application, diameter}]}
+  {"2.1",     [{restart_application, diameter}]},
+  {"2.1.1",   [{restart_application, diameter}]},
+  {"2.1.2",   [{restart_application, diameter}]},
+  {"2.1.3",   [{restart_application, diameter}]}
  ]
 }.
diff --git a/lib/diameter/vsn.mk b/lib/diameter/vsn.mk
index f73f68da0b..b0fb4ada28 100644
--- a/lib/diameter/vsn.mk
+++ b/lib/diameter/vsn.mk
@@ -1,6 +1,6 @@
 # %CopyrightBegin%
 #
-# Copyright Ericsson AB 2010-2017. All Rights Reserved.
+# Copyright Ericsson AB 2010-2018. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,5 +17,5 @@
 # %CopyrightEnd%
 
 APPLICATION  = diameter
-DIAMETER_VSN = 2.1.1
+DIAMETER_VSN = 2.1.4
 APP_VSN      = $(APPLICATION)-$(DIAMETER_VSN)$(PRE_VSN)
diff --git a/lib/edoc/doc/src/notes.xml b/lib/edoc/doc/src/notes.xml
index 96d7597d83..240789e876 100644
--- a/lib/edoc/doc/src/notes.xml
+++ b/lib/edoc/doc/src/notes.xml
@@ -32,6 +32,21 @@
   <p>This document describes the changes made to the EDoc
     application.</p>
 
+<section><title>Edoc 0.9.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> The map type is correctly denoted as <c>map()</c> in
+	    function specifications and types. </p>
+          <p>
+	    Own Id: OTP-14777</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Edoc 0.9.1</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/edoc/src/edoc_specs.erl b/lib/edoc/src/edoc_specs.erl
index 26b7202462..7b451c43f8 100644
--- a/lib/edoc/src/edoc_specs.erl
+++ b/lib/edoc/src/edoc_specs.erl
@@ -372,7 +372,7 @@ d2e({type,_,binary,[Base,Unit]}, _Prec) ->
     {integer,_,U} = erl_eval:partial_eval(Unit),
     #t_binary{base_size = B, unit_size = U};
 d2e({type,_,map,any}, _Prec) ->
-    #t_map{types = []};
+    #t_type{name = #t_name{name = map}, args = []};
 d2e({type,_,map,Es}, _Prec) ->
     #t_map{types = d2e(Es) };
 d2e({type,_,map_field_assoc,[K,V]}, Prec) ->
diff --git a/lib/edoc/vsn.mk b/lib/edoc/vsn.mk
index 065944ccef..2f6d469536 100644
--- a/lib/edoc/vsn.mk
+++ b/lib/edoc/vsn.mk
@@ -1 +1 @@
-EDOC_VSN = 0.9.1
+EDOC_VSN = 0.9.2
diff --git a/lib/eldap/doc/src/Makefile b/lib/eldap/doc/src/Makefile
index ac869e446f..aff1da4a9a 100644
--- a/lib/eldap/doc/src/Makefile
+++ b/lib/eldap/doc/src/Makefile
@@ -37,7 +37,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN)
 XML_APPLICATION_FILES = ref_man.xml
 XML_REF3_FILES = eldap.xml
 
-XML_PART_FILES = release_notes.xml usersguide.xml
+XML_PART_FILES = usersguide.xml
 XML_CHAPTER_FILES = notes.xml
 
 BOOK_FILES = book.xml
diff --git a/lib/eldap/doc/src/notes.xml b/lib/eldap/doc/src/notes.xml
index 7aad745f67..8b066671ee 100644
--- a/lib/eldap/doc/src/notes.xml
+++ b/lib/eldap/doc/src/notes.xml
@@ -31,6 +31,21 @@
   </header>
   <p>This document describes the changes made to the Eldap application.</p>
 
+<section><title>Eldap 1.2.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Eldap 1.2.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/eldap/vsn.mk b/lib/eldap/vsn.mk
index 721387d97d..1636b6bb6d 100644
--- a/lib/eldap/vsn.mk
+++ b/lib/eldap/vsn.mk
@@ -1 +1 @@
-ELDAP_VSN = 1.2.2
+ELDAP_VSN = 1.2.3
diff --git a/lib/erl_docgen/doc/src/notes.xml b/lib/erl_docgen/doc/src/notes.xml
index 59c65665d4..2652b4b0c8 100644
--- a/lib/erl_docgen/doc/src/notes.xml
+++ b/lib/erl_docgen/doc/src/notes.xml
@@ -31,7 +31,26 @@
   </header>
   <p>This document describes the changes made to the <em>erl_docgen</em> application.</p>
 
-  <section><title>Erl_Docgen 0.7.1</title>
+  <section><title>Erl_Docgen 0.7.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> The style for code, warning and note tags in the pdf
+	    have been changed so they look like the html version.
+	    <br/> The spacing around code blocks have been changed
+	    for both html and pdf so it's the same regardless if the
+	    user have a newline after the start tag (or before the
+	    end tag) or not. </p>
+          <p>
+	    Own Id: OTP-14674</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Erl_Docgen 0.7.1</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/erl_docgen/priv/dtd/erlref.dtd b/lib/erl_docgen/priv/dtd/erlref.dtd
index 615b88b61a..78d6771f52 100644
--- a/lib/erl_docgen/priv/dtd/erlref.dtd
+++ b/lib/erl_docgen/priv/dtd/erlref.dtd
@@ -33,4 +33,5 @@
 <!ATTLIST name                 name CDATA #IMPLIED
                                arity CDATA #IMPLIED
 	                       clause_i CDATA #IMPLIED
+                               anchor CDATA #IMPLIED
                                n_vars CDATA #IMPLIED>
diff --git a/lib/erl_docgen/priv/xsl/db_html.xsl b/lib/erl_docgen/priv/xsl/db_html.xsl
index 75614392fb..5b7eae4f73 100644
--- a/lib/erl_docgen/priv/xsl/db_html.xsl
+++ b/lib/erl_docgen/priv/xsl/db_html.xsl
@@ -172,6 +172,7 @@
   <xsl:template name="spec_name">
     <xsl:variable name="name" select="@name"/>
     <xsl:variable name="arity" select="@arity"/>
+    <xsl:variable name="anchor" select="@anchor"/>
     <xsl:variable name="spec0">
       <xsl:call-template name="find_spec"/>
     </xsl:variable>
@@ -198,6 +199,11 @@
 	  </xsl:otherwise>
         </xsl:choose>
 
+	<!-- Insert an anchor for "anchor" attribute -->
+	<xsl:if test="string-length($anchor) > 0">
+	      <a name="{$anchor}"></a>
+	</xsl:if>
+
         <xsl:variable name="global_types" select="ancestor::erlref/datatypes"/>
 	<xsl:variable name="local_types"
 		      select="../type[string-length(@name) > 0]"/>
diff --git a/lib/erl_docgen/src/docgen_edoc_xml_cb.erl b/lib/erl_docgen/src/docgen_edoc_xml_cb.erl
index 67e6e33c93..b065c18cda 100644
--- a/lib/erl_docgen/src/docgen_edoc_xml_cb.erl
+++ b/lib/erl_docgen/src/docgen_edoc_xml_cb.erl
@@ -489,6 +489,8 @@ otp_xmlify_a_href("#"++_ = Marker, Es0) -> % <seealso marker="#what">
     {Marker, Es0};
 otp_xmlify_a_href("http:"++_ = URL, Es0) -> % external URL
     {URL, Es0};
+otp_xmlify_a_href("https:"++_ = URL, Es0) -> % external URL
+    {URL, Es0};
 otp_xmlify_a_href("OTPROOT"++AppRef, Es0) -> % <.. marker="App:FileRef
     [AppS, "doc", FileRef1] = split(AppRef, "/"),
     FileRef = AppS++":"++otp_xmlify_a_fileref(FileRef1, AppS),
diff --git a/lib/erl_docgen/vsn.mk b/lib/erl_docgen/vsn.mk
index 17a7c483f4..95b2329ac5 100644
--- a/lib/erl_docgen/vsn.mk
+++ b/lib/erl_docgen/vsn.mk
@@ -1 +1 @@
-ERL_DOCGEN_VSN = 0.7.1
+ERL_DOCGEN_VSN = 0.7.2
diff --git a/lib/erl_interface/doc/src/Makefile b/lib/erl_interface/doc/src/Makefile
index a96ef62786..8ef7e9648c 100644
--- a/lib/erl_interface/doc/src/Makefile
+++ b/lib/erl_interface/doc/src/Makefile
@@ -53,7 +53,7 @@ XML_APPLICATION_FILES = ref_man.xml
 #ref_man_ei.xml ref_man_erl_interface.xml
 XML_PART_FILES = \
 	part.xml
-XML_CHAPTER_FILES = ei_users_guide.xml notes.xml notes_history.xml
+XML_CHAPTER_FILES = ei_users_guide.xml notes.xml
 
 XML_FILES = $(XML_REF1_FILES) $(XML_REF3_FILES) $(BOOK_FILES) \
 	 $(XML_APPLICATION_FILES) $(XML_PART_FILES) $(XML_CHAPTER_FILES)
diff --git a/lib/erl_interface/doc/src/notes.xml b/lib/erl_interface/doc/src/notes.xml
index ec20f3c67f..641a3de13f 100644
--- a/lib/erl_interface/doc/src/notes.xml
+++ b/lib/erl_interface/doc/src/notes.xml
@@ -31,6 +31,21 @@
   </header>
   <p>This document describes the changes made to the Erl_interface application.</p>
 
+<section><title>Erl_Interface 3.10.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Erl_Interface 3.10</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/erl_interface/src/Makefile b/lib/erl_interface/src/Makefile
index 31f34d4bba..135522397b 100644
--- a/lib/erl_interface/src/Makefile
+++ b/lib/erl_interface/src/Makefile
@@ -29,5 +29,5 @@ include $(ERL_TOP)/make/target.mk
 debug opt shared purify quantify purecov gcov:
 	$(make_verbose)$(MAKE) -f $(TARGET)/Makefile TYPE=$@
 
-clean depend docs release release_docs tests release_tests check:
+clean depend docs release release_docs tests release_tests check xmllint:
 	$(make_verbose)$(MAKE) -f $(TARGET)/Makefile $@
diff --git a/lib/erl_interface/src/Makefile.in b/lib/erl_interface/src/Makefile.in
index 4f393e952c..69b5b6003d 100644
--- a/lib/erl_interface/src/Makefile.in
+++ b/lib/erl_interface/src/Makefile.in
@@ -854,3 +854,5 @@ endif
 release_docs:
 
 release_tests:
+
+xmllint:
diff --git a/lib/erl_interface/test/ei_accept_SUITE.erl b/lib/erl_interface/test/ei_accept_SUITE.erl
index e06ee762d7..6676e73e21 100644
--- a/lib/erl_interface/test/ei_accept_SUITE.erl
+++ b/lib/erl_interface/test/ei_accept_SUITE.erl
@@ -25,7 +25,8 @@
 -include("ei_accept_SUITE_data/ei_accept_test_cases.hrl").
 
 -export([all/0, suite/0,
-         ei_accept/1, ei_threaded_accept/1]).
+         ei_accept/1, ei_threaded_accept/1,
+         monitor_ei_process/1]).
 
 -import(runner, [get_term/1,send_term/2]).
 
@@ -34,7 +35,8 @@ suite() ->
      {timetrap, {seconds, 30}}].
 
 all() -> 
-    [ei_accept, ei_threaded_accept].
+    [ei_accept, ei_threaded_accept,
+     monitor_ei_process].
 
 ei_accept(Config) when is_list(Config) ->
     P = runner:start(?interpret),
@@ -44,33 +46,32 @@ ei_accept(Config) when is_list(Config) ->
     io:format("Myname ~p ~n",  [Myname]),
     EINode = list_to_atom("c42@"++Myname),
     io:format("EINode ~p ~n",  [EINode]),
+
+    %% We take this opportunity to also test export-funs and bit-strings
+    %% with (ugly) tuple fallbacks.
+    %% Test both toward pending connection and established connection.
+    RealTerms = [<<1:1>>,     fun lists:map/2],
+    Fallbacks = [{<<128>>,1}, {lists,map}],
+
     Self = self(),
-    TermToSend= {call, Self, "Test"},
-    F= fun() ->
-               case waitfornode("c42",20) of
-                   true ->
-                       {any, EINode} ! TermToSend,
-                       Self ! sent_ok;
-                   false ->
-                       Self ! never_published
-               end,
-               ok
-       end,
-
-    spawn(F),
+    Funny = fun() -> hello end,
+    TermToSend = {call, Self, "Test", Funny, RealTerms},
+    TermToGet  = {call, Self, "Test", Funny, Fallbacks},
     Port = 6543,
-    {ok, Fd, _Node} = ei_accept(P, Port),
-    TermReceived= ei_receive(P, Fd),
-    io:format("Sent ~p received ~p ~n", [TermToSend, TermReceived]),
-    TermToSend= TermReceived,
-    receive
-        sent_ok ->
-            ok;
-        Unknown ->
-            io:format("~p ~n", [Unknown])
-    after 1000 ->
-              io:format("timeout ~n")
-    end,
+    {ok, ListenFd} = ei_publish(P, Port),
+    {any, EINode} ! TermToSend,
+
+    {ok, Fd, _Node} = ei_accept(P, ListenFd),
+    Got1 = ei_receive(P, Fd),
+
+    %% Send again, now without auto-connect
+    {any, EINode} ! TermToSend,
+    Got2 = ei_receive(P, Fd),
+
+    io:format("Sent ~p~nExp. ~p~nGot1 ~p~nGot2 ~p~n", [TermToSend, TermToGet, Got1, Got2]),
+    TermToGet = Got1,
+    TermToGet = Got2,
+
     runner:finish(P),
     ok.
 
@@ -87,6 +88,41 @@ ei_threaded_accept(Config) when is_list(Config) ->
     [receive I -> ok end || I <- lists:seq(0, N-1) ],
     ok.
 
+
+%% Test erlang:monitor toward erl_interface "processes"
+monitor_ei_process(Config) when is_list(Config) ->
+    P = runner:start(?interpret),
+    0 = ei_connect_init(P, 42, erlang:get_cookie(), 0),
+
+    Myname = hd(tl(string:tokens(atom_to_list(node()), "@"))),
+    io:format("Myname ~p ~n",  [Myname]),
+    EINode = list_to_atom("c42@"++Myname),
+    io:format("EINode ~p ~n",  [EINode]),
+
+    Self = self(),
+    Port = 6543,
+    {ok, ListenFd} = ei_publish(P, Port),
+    MRef1 = erlang:monitor(process, {any, EINode}),
+    {any, EINode} ! hello,
+
+    {ok, Fd, _Node} = ei_accept(P, ListenFd),
+    hello = ei_receive(P, Fd),
+
+    %% Again, now on an established connection.
+    MRef2 = erlang:monitor(process, {any, EINode}),
+    {any, EINode} ! hello,
+    hello = ei_receive(P, Fd),
+
+    ok = receive M -> M after 0 -> ok end,
+
+    runner:finish(P),
+
+    [{'DOWN', MRef1, process, {any, EINode}, noconnection},
+     {'DOWN', MRef2, process, {any, EINode}, noconnection}
+    ] = lists:sort(flush(2, 1000)),
+
+    ok.
+
 waitfornode(String,0) ->
     io:format("~s never published itself.~n",[String]),
     false;
@@ -137,8 +173,15 @@ ei_connect_init(P, Num, Cookie, Creation) ->
         {term,Int} when is_integer(Int) -> Int
     end.
 
-ei_accept(P, PortNo) ->
-    send_command(P, ei_accept, [PortNo]),
+ei_publish(P, PortNo) ->
+    send_command(P, ei_publish, [PortNo]),
+    case get_term(P) of
+        {term,{ListenFd, EpmdFd, _}} when ListenFd >= 0, EpmdFd >= 0 -> {ok, ListenFd};
+        {term,{_, _, Errno}} -> {error,Errno}
+    end.
+
+ei_accept(P, ListenFd) ->
+    send_command(P, ei_accept, [ListenFd]),
     case get_term(P) of
         {term,{Fd, _, Node}} when Fd >= 0 -> {ok, Fd, Node};
         {term,{_Fd, Errno, _Node}} -> {error,Errno}
@@ -151,3 +194,12 @@ ei_receive(P, Fd) ->
 
 send_command(P, Name, Args) ->
     runner:send_term(P, {Name,list_to_tuple(Args)}).
+
+flush(0, Timeout) ->
+    flush(1, Timeout div 10);
+flush(Expected, Timeout) ->
+    receive M ->
+            [M | flush(Expected-1, Timeout)]
+    after Timeout ->
+            []
+    end.
diff --git a/lib/erl_interface/test/ei_accept_SUITE_data/ei_accept_test.c b/lib/erl_interface/test/ei_accept_SUITE_data/ei_accept_test.c
index 7b81ee5491..2b62d7c3a4 100644
--- a/lib/erl_interface/test/ei_accept_SUITE_data/ei_accept_test.c
+++ b/lib/erl_interface/test/ei_accept_SUITE_data/ei_accept_test.c
@@ -43,6 +43,7 @@
 #include "ei_runner.h"
 
 static void cmd_ei_connect_init(char* buf, int len);
+static void cmd_ei_publish(char* buf, int len);
 static void cmd_ei_accept(char* buf, int len);
 static void cmd_ei_receive(char* buf, int len);
 static void cmd_ei_unpublish(char* buf, int len);
@@ -58,6 +59,7 @@ static struct {
     void (*func)(char* buf, int len);
 } commands[] = {
     "ei_connect_init",  3, cmd_ei_connect_init,
+    "ei_publish", 	1, cmd_ei_publish,
     "ei_accept", 	1, cmd_ei_accept,
     "ei_receive",  	1, cmd_ei_receive,
     "ei_unpublish",     0, cmd_ei_unpublish
@@ -149,11 +151,10 @@ static int my_listen(int port)
     return listen_fd;
 }
 
-static void cmd_ei_accept(char* buf, int len)
+static void cmd_ei_publish(char* buf, int len)
 {
     int index = 0;
     int listen, r;
-    ErlConnect conn;
     long port;
     ei_x_buff x;
     int i;
@@ -170,6 +171,29 @@ static void cmd_ei_accept(char* buf, int len)
 #ifdef VXWORKS
     save_fd(i);
 #endif
+    /* send listen-fd, result and errno */
+    ei_x_new_with_version(&x);
+    ei_x_encode_tuple_header(&x, 3);
+    ei_x_encode_long(&x, listen);
+    ei_x_encode_long(&x, i);
+    ei_x_encode_long(&x, erl_errno);
+    send_bin_term(&x);
+    ei_x_free(&x);
+}
+
+static void cmd_ei_accept(char* buf, int len)
+{
+    int index = 0;
+    int r;
+    ErlConnect conn;
+    long listen;
+    ei_x_buff x;
+    int i;
+
+    /* get port */
+    if (ei_decode_long(buf, &index, &listen) < 0)
+	fail("expected int (listen fd)");
+
     r = ei_accept(&ec, listen, &conn);
 #ifdef VXWORKS
     save_fd(r);
@@ -200,7 +224,7 @@ static void cmd_ei_receive(char* buf, int len)
 	if (got == ERL_TICK)
 	    continue;
 	if (got == ERL_ERROR)
-	    fail("ei_xreceive_msg");
+	    fail1("ei_xreceive_msg, got==%d", got);
 	break;
     }
     index = 1;
diff --git a/lib/erl_interface/test/runner.erl b/lib/erl_interface/test/runner.erl
index 1084eec2a3..cbdeb3c8a9 100644
--- a/lib/erl_interface/test/runner.erl
+++ b/lib/erl_interface/test/runner.erl
@@ -67,7 +67,12 @@ start({Prog, Tc}) when is_list(Prog), is_integer(Tc) ->
 
 finish(Port) when is_port(Port) ->
     send_eot(Port),
-    recv_eot(Port).
+    ok = recv_eot(Port),
+    0 = receive
+            {Port,{exit_status,Status}} ->
+                Status
+        end,
+    ok.
 
 %% Sends an Erlang term to a C program.
 
diff --git a/lib/erl_interface/vsn.mk b/lib/erl_interface/vsn.mk
index 01fcee86dd..d76d110afd 100644
--- a/lib/erl_interface/vsn.mk
+++ b/lib/erl_interface/vsn.mk
@@ -1,2 +1,2 @@
-EI_VSN = 3.10
+EI_VSN = 3.10.1
 ERL_INTERFACE_VSN = $(EI_VSN)
diff --git a/lib/et/src/et_wx_contents_viewer.erl b/lib/et/src/et_wx_contents_viewer.erl
index bca517317e..7ca41da3e8 100644
--- a/lib/et/src/et_wx_contents_viewer.erl
+++ b/lib/et/src/et_wx_contents_viewer.erl
@@ -93,8 +93,8 @@ start_link(Options) ->
 		end,
 		{ok, Pid}
 	    catch
-		error:Reason ->
-		    {error, {'EXIT', Reason, erlang:get_stacktrace()}}
+		error:Reason:Stacktrace ->
+		    {error, {'EXIT', Reason, Stacktrace}}
 	    end;
 	{error, Reason} ->
 	    {error, Reason}
diff --git a/lib/eunit/doc/src/notes.xml b/lib/eunit/doc/src/notes.xml
index 7133befe37..b38cb2e70e 100644
--- a/lib/eunit/doc/src/notes.xml
+++ b/lib/eunit/doc/src/notes.xml
@@ -33,6 +33,21 @@
   </header>
   <p>This document describes the changes made to the EUnit application.</p>
 
+<section><title>Eunit 2.3.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Eunit 2.3.4</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/eunit/src/eunit_lib.erl b/lib/eunit/src/eunit_lib.erl
index d1bd160ea1..771541354c 100644
--- a/lib/eunit/src/eunit_lib.erl
+++ b/lib/eunit/src/eunit_lib.erl
@@ -202,13 +202,13 @@ format_exception_test_() ->
         "\nymmud:rorre"++_,
         lists:reverse(lists:flatten(
           format_exception(try erlang:error(dummy)
-                           catch C:R -> {C, R, erlang:get_stacktrace()}
+                           catch C:R:S -> {C, R, S}
                            end)))),
      ?_assertMatch(
         "\nymmud:rorre"++_,
         lists:reverse(lists:flatten(
           format_exception(try erlang:error(dummy, [a])
-                           catch C:R -> {C, R, erlang:get_stacktrace()}
+                           catch C:R:S -> {C, R, S}
                            end))))].
 -endif.
 
diff --git a/lib/eunit/src/eunit_listener.erl b/lib/eunit/src/eunit_listener.erl
index e652c5b2f6..75aa05c543 100644
--- a/lib/eunit/src/eunit_listener.erl
+++ b/lib/eunit/src/eunit_listener.erl
@@ -137,8 +137,7 @@ call(F, As, St) when is_atom(F) ->
     try apply(St#state.callback, F, As) of
 	Substate -> St#state{state = Substate}
     catch
-	Class:Term ->
-	    Trace = erlang:get_stacktrace(),
+	Class:Term:Trace ->
 	    if F =/= terminate ->
 		    call(terminate, [{error, {Class, Term, Trace}},
 				     St#state.state], St);
diff --git a/lib/eunit/src/eunit_proc.erl b/lib/eunit/src/eunit_proc.erl
index e075005238..96bdcf88b6 100644
--- a/lib/eunit/src/eunit_proc.erl
+++ b/lib/eunit/src/eunit_proc.erl
@@ -628,7 +628,7 @@ io_request({put_chars, M, F, As}, Buf) ->
     try apply(M, F, As) of
 	Chars -> {ok, [Chars | Buf]}
     catch
-	C:T -> {{error, {C,T,erlang:get_stacktrace()}}, Buf}
+	C:T:S -> {{error, {C,T,S}}, Buf}
     end;
 io_request({put_chars, _Enc, Chars}, Buf) ->
     io_request({put_chars, Chars}, Buf);
diff --git a/lib/eunit/src/eunit_test.erl b/lib/eunit/src/eunit_test.erl
index 6036537178..6fe85ae70a 100644
--- a/lib/eunit/src/eunit_test.erl
+++ b/lib/eunit/src/eunit_test.erl
@@ -39,11 +39,11 @@
 %% somewhat, but you can't have everything.) Note that we assume that
 %% this particular module is the boundary between eunit and user code.
 
-get_stacktrace() ->
-    get_stacktrace([]).
+get_stacktrace(Trace) ->
+    get_stacktrace(Trace, []).
 
-get_stacktrace(Ts) ->
-    eunit_lib:uniq(prune_trace(erlang:get_stacktrace(), Ts)).
+get_stacktrace(Trace, Ts) ->
+    eunit_lib:uniq(prune_trace(Trace, Ts)).
 
 -dialyzer({no_match, prune_trace/2}).
 prune_trace([{eunit_data, _, _} | Rest], Tail) ->
@@ -75,8 +75,8 @@ run_testfun(F) ->
 	{eunit_internal, Term} ->
 	    %% Internally generated: re-throw Term (lose the trace)
 	    throw(Term);
-	Class:Reason ->
-	    {error, {Class, Reason, get_stacktrace()}}
+	Class:Reason:Trace ->
+	    {error, {Class, Reason, Trace}}
     end.
 
 
@@ -272,7 +272,7 @@ mf_wrapper(M, F) ->
     fun () ->
  	    try M:F()
  	    catch
- 		error:undef ->
+ 		error:undef:Trace ->
  		    %% Check if it was M:F/0 that was undefined
  		    case erlang:module_loaded(M) of
  			false ->
@@ -282,14 +282,14 @@ mf_wrapper(M, F) ->
  				false ->
  				    fail({no_such_function, {M,F,0}});
  				true ->
- 				    rethrow(error, undef, [{M,F,0}])
+ 				    rethrow(error, undef, Trace, [{M,F,0}])
  			    end
  		    end
  	    end
     end.
 
-rethrow(Class, Reason, Trace) ->
-    erlang:raise(Class, Reason, get_stacktrace(Trace)).
+rethrow(Class, Reason, Trace, Ts) ->
+    erlang:raise(Class, Reason, get_stacktrace(Trace, Ts)).
 
 fail(Term) ->
     throw({eunit_internal, Term}).				   
@@ -332,12 +332,14 @@ enter_context(Setup, Cleanup, Instantiate, Callback) ->
 		T ->
                     case eunit_lib:is_not_test(T) of
                         true ->
-                            catch throw(error),  % generate a stack trace
+                            {_, Stacktrace} =
+                                erlang:process_info(self(),
+                                                    current_stacktrace),
                             {module,M} = erlang:fun_info(Instantiate, module),
                             {name,N} = erlang:fun_info(Instantiate, name),
                             {arity,A} = erlang:fun_info(Instantiate, arity),
                             context_error({bad_instantiator, {{M,N,A},T}},
-                                          error, badarg);
+                                          error, Stacktrace, badarg);
                         false ->
                             ok
                     end,
@@ -346,21 +348,22 @@ enter_context(Setup, Cleanup, Instantiate, Callback) ->
 			%% Always run cleanup; client may be an idiot
 			try Cleanup(R)
 			catch
-			    Class:Term ->
-				context_error(cleanup_failed, Class, Term)
+			    Class:Term:Trace ->
+				context_error(cleanup_failed,
+                                              Class, Trace, Term)
 			end
 		    end
 	    catch
-		Class:Term ->
-		    context_error(instantiation_failed, Class, Term)
+		Class:Term:Trace ->
+		    context_error(instantiation_failed, Class, Trace, Term)
 	    end
     catch
-	Class:Term ->
-	    context_error(setup_failed, Class, Term)
+	Class:Term:Trace ->
+	    context_error(setup_failed, Class, Trace, Term)
     end.
 
-context_error(Type, Class, Term) ->
-    throw({context_error, Type, {Class, Term, get_stacktrace()}}).
+context_error(Type, Class, Trace, Term) ->
+    throw({context_error, Type, {Class, Term, get_stacktrace(Trace)}}).
 
 %% This generates single setup/cleanup functions from a list of tuples
 %% on the form {Tag, Setup, Cleanup}, where the setup function always
@@ -378,8 +381,8 @@ multi_setup([{Tag, S, C} | Es], CleanupPrev) ->
 		      try C(R) of
 			  _ -> CleanupPrev(Rs)
 		      catch
-			  Class:Term ->
-			      throw({Tag, {Class, Term, get_stacktrace()}})
+			  Class:Term:Trace ->
+			      throw({Tag, {Class, Term, Trace}})
 		      end
 	      end,
     {SetupRest, CleanupAll} = multi_setup(Es, Cleanup),
@@ -388,9 +391,9 @@ multi_setup([{Tag, S, C} | Es], CleanupPrev) ->
 		 R ->
 		     SetupRest([R|Rs])
 	     catch
-		 Class:Term ->
+		 Class:Term:Trace ->
 		     CleanupPrev(Rs),
-		     throw({Tag, {Class, Term, get_stacktrace()}})
+		     throw({Tag, {Class, Term, Trace}})
 	     end
      end,
      CleanupAll};
diff --git a/lib/eunit/vsn.mk b/lib/eunit/vsn.mk
index 25bb0dec17..2ed9eaac16 100644
--- a/lib/eunit/vsn.mk
+++ b/lib/eunit/vsn.mk
@@ -1 +1 @@
-EUNIT_VSN = 2.3.4
+EUNIT_VSN = 2.3.5
diff --git a/lib/hipe/cerl/Makefile b/lib/hipe/cerl/Makefile
index 9f50d6bf91..b6116c4276 100644
--- a/lib/hipe/cerl/Makefile
+++ b/lib/hipe/cerl/Makefile
@@ -44,7 +44,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/hipe-$(VSN)
 # Target Specs
 # ----------------------------------------------------
 MODULES = cerl_cconv cerl_closurean cerl_hipeify cerl_lib \
-	  cerl_messagean cerl_pmatch cerl_prettypr cerl_to_icode \
+	  cerl_pmatch cerl_prettypr cerl_to_icode \
 	  cerl_typean erl_bif_types erl_types 
 
 HRL_FILES= cerl_hipe_primops.hrl
diff --git a/lib/hipe/cerl/cerl_messagean.erl b/lib/hipe/cerl/cerl_messagean.erl
deleted file mode 100644
index c79e045bd0..0000000000
--- a/lib/hipe/cerl/cerl_messagean.erl
+++ /dev/null
@@ -1,1095 +0,0 @@
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% @copyright 2002 Richard Carlsson
-%% @author Richard Carlsson <[email protected]>
-%% @doc Message analysis of Core Erlang programs.
-
-%% TODO: might need a "top" (`any') element for any-length value lists.
-
--module(cerl_messagean).
-
--export([annotate/1]).
-
--import(cerl, [alias_pat/1, alias_var/1, ann_c_var/2, ann_c_fun/3,
-	       apply_args/1, apply_op/1, atom_val/1, bitstr_size/1,
-	       bitstr_val/1, binary_segments/1, c_letrec/2,
-	       ann_c_tuple/2, c_nil/0, call_args/1, call_module/1,
-	       call_name/1, case_arg/1, case_clauses/1, catch_body/1,
-	       clause_body/1, clause_guard/1, clause_pats/1, cons_hd/1,
-	       cons_tl/1, fun_body/1, fun_vars/1, get_ann/1, int_val/1,
-	       is_c_atom/1, is_c_int/1, let_arg/1, let_body/1,
-	       let_vars/1, letrec_body/1, letrec_defs/1, module_defs/1,
-	       module_defs/1, module_exports/1, pat_vars/1,
-	       primop_args/1, primop_name/1, receive_action/1,
-	       receive_clauses/1, receive_timeout/1, seq_arg/1,
-	       seq_body/1, set_ann/2, try_arg/1, try_body/1, try_vars/1,
-	       try_evars/1, try_handler/1, tuple_es/1, type/1,
-	       values_es/1]).
-
--import(cerl_trees, [get_label/1]).
-
--define(DEF_LIMIT, 4).
-
-%% -export([test/1, test1/1, ttest/1]).
-
-%% ttest(F) ->
-%%     {T, _} = cerl_trees:label(user_default:read(F)),
-%%     {Time0, _} = erlang:statistics(runtime),
-%%     analyze(T),
-%%     {Time1, _} = erlang:statistics(runtime),
-%%     Time1 - Time0.
-
-%% test(F) ->
-%%     {T, _} = cerl_trees:label(user_default:read(F)),
-%%     {Time0, _} = erlang:statistics(runtime),
-%%     {Esc, _Vars} = analyze(T),
-%%     {Time1, _} = erlang:statistics(runtime),
-%%     io:fwrite("messages: ~p.\n", [Esc]),
-%%     Set = sets:from_list(Esc),
-%%     H = fun (Node, Ctxt, Cont) ->
-%% 		Doc = case get_ann(Node) of
-%% 			  [{label, L} | _] ->
-%% 			      B = sets:is_element(L, Set),
-%% 			      bf(Node, Ctxt, Cont, B);
-%% 			  _ ->
-%% 			      bf(Node, Ctxt, Cont, false)
-%% 		      end,
-%% 		case type(Node) of
-%% 		    cons -> color(Doc);
-%% 		    tuple -> color(Doc);
-%% 		    _ -> Doc
-%% 		end
-%% 	end,
-%%     {ok, FD} = file:open("out.html",[write]),
-%%     Txt = cerl_prettypr:format(T, [{hook, H},{user,false}]),
-%%     io:put_chars(FD, "<pre>\n"),
-%%     io:put_chars(FD, html(Txt)),
-%%     io:put_chars(FD, "</pre>\n"),
-%%     file:close(FD),
-%%     {ok, Time1 - Time0}.
-
-%% test1(F) ->
-%%     {T, _} = cerl_trees:label(user_default:read(F)),
-%%     {Time0, _} = erlang:statistics(runtime),
-%%     {T1, Esc, Vars} = annotate(T),
-%%     {Time1, _} = erlang:statistics(runtime),
-%%     io:fwrite("messages: ~p.\n", [Esc]),
-%% %%%     io:fwrite("vars: ~p.\n", [[X || X <- dict:to_list(Vars)]]),
-%%     T2 = hhl_transform:transform(T1, Vars),
-%%     Set = sets:from_list(Esc),
-%%     H = fun (Node, Ctxt, Cont) ->
-%% 		case get_ann(Node) of
-%% 		    [{label, L} | _] ->
-%% 			B = sets:is_element(L, Set),
-%% 			bf(Node, Ctxt, Cont, B);
-%% 		    _ ->
-%% 			bf(Node, Ctxt, Cont, false)
-%% 		end
-%%     end,
-%%     {ok, FD} = file:open("out.html",[write]),
-%%     Txt = cerl_prettypr:format(T2, [{hook, H},{user,false}]),
-%%     io:put_chars(FD, "<pre>\n"),
-%%     io:put_chars(FD, html(Txt)),
-%%     io:put_chars(FD, "</pre>\n"),
-%%     file:close(FD),
-%%     {ok, Time1 - Time0}.
-
-%% html(Cs) ->
-%%     html(Cs, []).
-
-%% html([$#, $< | Cs], As) ->
-%%     html_1(Cs, [$< | As]);
-%% html([$< | Cs], As) ->
-%%     html(Cs, ";tl&" ++ As);
-%% html([$> | Cs], As) ->
-%%     html(Cs, ";tg&" ++ As);
-%% html([$& | Cs], As) ->
-%%     html(Cs, ";pma&" ++ As);
-%% html([C | Cs], As) ->
-%%     html(Cs, [C | As]);
-%% html([], As) ->
-%%     lists:reverse(As).
-
-%% html_1([$> | Cs], As) ->
-%%     html(Cs, [$> | As]);
-%% html_1([C | Cs], As) ->
-%%     html_1(Cs, [C | As]).
-
-%% bf(Node, Ctxt, Cont, B) ->
-%%     B0 = cerl_prettypr:get_ctxt_user(Ctxt),
-%%     if B /= B0 ->
-%% 	    Ctxt1 = cerl_prettypr:set_ctxt_user(Ctxt, B),
-%% 	    Doc = Cont(Node, Ctxt1),
-%% 	    case B of
-%% 		true ->
-%% 		    Start = "<b>",
-%% 		    End = "</b>";
-%% 		false ->
-%% 		    Start = "</b>",
-%% 		    End = "<b>"
-%% 	    end,
-%% 	    markup(Doc, Start, End);
-%%        true ->
-%% 	    Cont(Node, Ctxt)
-%%     end.
-
-%% color(Doc) ->
-%% %    Doc.
-%%     markup(Doc, "<font color=blue>", "</font>").
-
-%% markup(Doc, Start, End) ->
-%%     prettypr:beside(
-%%       prettypr:null_text([$# | Start]),
-%%       prettypr:beside(Doc,
-%% 		      prettypr:null_text([$# | End]))).
-
-
-%% =====================================================================
-%% annotate(Tree) -> {Tree1, Escapes, Vars}
-%%
-%%	    Tree = cerl:cerl()
-%%
-%%	Analyzes `Tree' (see `analyze') and appends a term 'escapes', to
-%%	the annotation list of each constructor expression node and of
-%%	`Tree', corresponding to the escape information derived by the
-%%	analysis. Any previous such annotations are removed from `Tree'.
-%%	`Tree1' is the modified tree; for details on `OutList',
-%%	`Outputs' , `Dependencies', `Escapes' and `Parents', see
-%%	`analyze'.
-%%
-%%	Note: `Tree' must be annotated with labels in order to use this
-%%	function; see `analyze' for details.
-
--type label()   :: integer() | 'external' | 'top'.
--type ordset(X) :: [X].  % XXX: TAKE ME OUT
-
--spec annotate(cerl:cerl()) -> {cerl:cerl(), ordset(label()), dict:dict()}.
-
-annotate(Tree) ->
-    {Esc0, Vars} = analyze(Tree),
-    Esc = sets:from_list(Esc0),
-    F = fun (T) ->
-		case type(T) of
-		    literal -> T;
-%%% 		    var ->
-%%% 			L = get_label(T),
-%%% 			T1 = ann_escape(T, L, Esc),
-%%% 			X = dict:fetch(L, Vars),
-%%% 			set_ann(T1, append_ann({s,X}, get_ann(T1)));
-		    _ ->
-			L = get_label(T),
-			ann_escape(T, L, Esc)
-		end
-	end,
-    {cerl_trees:map(F, Tree), Esc0, Vars}.
-
-ann_escape(T, L, Esc) ->
-    case sets:is_element(L, Esc) of
-	true ->
-	    set_ann(T, append_ann(escapes, get_ann(T)));
-	false ->
-	    T
-    end.
-
-append_ann(Tag, [X | Xs]) ->
-    if tuple_size(X) >= 1, element(1, X) =:= Tag -> 
-	    append_ann(Tag, Xs);
-       true ->
-	    [X | append_ann(Tag, Xs)]
-    end;
-append_ann(Tag, []) ->
-    [Tag].
-
-
-%% =====================================================================
-%% analyze(Tree) -> Escapes
-%%
-%%	    Tree = cerl:cerl()
-%%	    Escapes = ordset(Label)
-%%	    Label = integer() | external | top
-%%
-%%	Analyzes a module or an expression represented by `Tree'.
-%%
-%%	`Escapes' is the set of labels of constructor expressions in
-%%	`Tree' such that the created values may be accessed from outside
-%%	`Tree'.
-%%
-%%	Note: `Tree' must be annotated with labels (as done by the
-%%	function `cerl_trees:label/1') in order to use this function.
-%%	The label annotation `{label, L}' (where L should be an integer)
-%%	must be the first element of the annotation list of each node in
-%%	the tree. Instances of variables bound in `Tree' which denote
-%%	the same variable must have the same label; apart from this,
-%%	labels should be unique. Constant literals do not need to be
-%%	labeled.
-
--record(state, {vars, out, dep, work, funs, k}).
-
-%% Note: We assume that all remote calls and primops return a single
-%% value.
-
-%% The analysis determines which objects (identified by the
-%% corresponding "cons-point" labels in the code) are likely to be
-%% passed in a message. (If so, we say that they "escape".) It is always
-%% safe to assume either case, because the send operation will assure
-%% that things are copied if necessary. This analysis tries to
-%% anticipate that copying will be done.
-%%
-%% Rules:
-%%   1) An object passed as message argument (or part of such an
-%%   argument) to a known send-operation, will probably be a message.
-%%   2) A received value is always a message (safe).
-%%   3) The external function can return any object (unsafe).
-%%   4) A function called from the external function can receive any
-%%   object (unsafe) as argument.
-%%   5) Unknown functions/operations can return any object (unsafe).
-
-%% We wrap the given syntax tree T in a fun-expression labeled `top',
-%% which is initially in the set of escaped labels. `top' will be
-%% visited at least once.
-%%
-%% We create a separate function labeled `external', defined as:
-%% "'external'/1 = fun () -> Any", which will represent any and all
-%% functions outside T, and which returns the 'unsafe' value.
-
-analyze(Tree) ->
-    analyze(Tree, ?DEF_LIMIT).
-
-analyze(Tree, Limit) ->
-    {_, _, Esc, Dep, _Par} = cerl_closurean:analyze(Tree),
-%%%     io:fwrite("dependencies: ~w.\n", [dict:to_list(Dep)]),
-    analyze(Tree, Limit, Dep, Esc).
-
-analyze(Tree, Limit, Dep0, Esc0) ->
-    %% Note that we use different name spaces for variable labels and
-    %% function/call site labels, so we can reuse some names here. We
-    %% assume that the labeling of Tree only uses integers, not atoms.
-    Any = ann_c_var([{label, any}], 'Any'),
-    External = ann_c_var([{label, external}], {external, 1}),
-    ExtFun = ann_c_fun([{label, external}], [], Any),
-%%%     io:fwrite("external fun:\n~s.\n",
-%%%   	      [cerl_prettypr:format(ExtFun, [noann, {paper, 80}])]),
-    Top = ann_c_var([{label, top}], {top, 0}),
-    TopFun = ann_c_fun([{label, top}], [], Tree),
-
-    %% The "start fun" just makes the initialisation easier. It is not
-    %% itself in the call graph.
-    StartFun =  ann_c_fun([{label, start}], [],
-			  c_letrec([{External, ExtFun}, {Top, TopFun}],
-				   c_nil())),
-%%%     io:fwrite("start fun:\n~s.\n",
-%%%  	      [cerl_prettypr:format(StartFun, [{paper, 80}])]),
-
-    %% Initialise the Any and Escape variables. Gather a database of all
-    %% fun-expressions in Tree and initialise their outputs and parameter
-    %% variables. All escaping functions can receive any values as
-    %% inputs. Bind all module- and letrec-defined variables to their
-    %% corresponding labels.
-    Esc = sets:from_list(Esc0),
-    Unsafe = unsafe(),
-    Empty = empty(),
-    Funs0 = dict:new(),
-    Vars0 = dict:store(escape, empty(), 
-		       dict:store(any, Unsafe, dict:new())),
-    Out0 = dict:new(),
-    F = fun (T, S = {Fs, Vs, Os}) ->
-		case type(T) of
-		    'fun' ->
-			L = get_label(T),
-			As = fun_vars(T),
-			X = case sets:is_element(L, Esc) of
-				true -> Unsafe;
-				false -> Empty
-			    end,
-			{dict:store(L, T, Fs),
-			 bind_vars_single(As, X, Vs),
-			 dict:store(L, none, Os)};
-		    letrec ->
-			{Fs, bind_defs(letrec_defs(T), Vs), Os};
-		    module ->
-			{Fs, bind_defs(module_defs(T), Vs), Os};
-		    _ ->
-			S
-		end
-	end,
-    {Funs, Vars, Out} = cerl_trees:fold(F, {Funs0, Vars0, Out0}, StartFun),
-
-    %% Add the dependency for the loop in 'external':
-    Dep = add_dep(loop, external, Dep0),
-
-    %% Enter the fixpoint iteration at the StartFun.
-    St = loop(StartFun, start, #state{vars = Vars,
-				      out = Out,
-				      dep = Dep,
-				      work = init_work(),
-				      funs = Funs,
-				      k = Limit}),
-    Ms = labels(dict:fetch(escape, St#state.vars)),
-    {Ms, St#state.vars}.
-
-loop(T, L, St0) ->
-%%%     io:fwrite("analyzing: ~w.\n",[L]),
-%%%     io:fwrite("work: ~w.\n", [St0#state.work]),
-    Xs0 = dict:fetch(L, St0#state.out),
-    {Xs1, St1} = visit(fun_body(T), L, St0),
-    Xs = limit(Xs1, St1#state.k),
-    {W, M} = case equal(Xs0, Xs) of
-		 true ->
-		     {St1#state.work, St1#state.out};
-		 false ->
-%%%       		     io:fwrite("out (~w) changed: ~w <- ~w.\n",
-%%%       			       [L, Xs, Xs0]),
-		     M1 = dict:store(L, Xs, St1#state.out),
-		     case dict:find(L, St1#state.dep) of
-			 {ok, S} ->
-			     {add_work(set__to_list(S), St1#state.work),
-			      M1};
-			 error ->
-			     {St1#state.work, M1}
-		     end
-	     end,
-    St2 = St1#state{out = M},
-    case take_work(W) of
-	{ok, L1, W1} ->
- 	    T1 = dict:fetch(L1, St2#state.funs),
- 	    loop(T1, L1, St2#state{work = W1});
-	none ->
-	    St2
-    end.
-
-visit(T, L, St) ->
-%%%     io:fwrite("visiting: ~w.\n",[type(T)]),
-    case type(T) of
-	literal ->
-	    %% This is (or should be) a constant, even if it's compound,
-	    %% so it's bugger all whether it is sent or not.
-	    case cerl:concrete(T) of
-		[] -> {[empty()], St};
-		X when is_atom(X) -> {[empty()], St};
-		X when is_integer(X) -> {[empty()], St};
-		X when is_float(X) -> {[empty()], St};
-		_ ->
-		    exit({not_literal, T})
-	    end;
-	var ->
-	    %% If a variable is not already in the store here, it must
-	    %% be free in the program.
-	    L1 = get_label(T),
-	    Vars = St#state.vars,
-	    case dict:find(L1, Vars) of
-		{ok, X} ->
-		    {[X], St};
-		error ->
-%%% 		    io:fwrite("free var: ~w.\n",[L1]),
-		    X = unsafe(),
-		    St1 = St#state{vars = dict:store(L1, X, Vars)},
-		    {[X], St1}
-	    end;
-	'fun' ->
-	    %% Must revisit the fun also, because its environment might
-	    %% have changed. (We don't keep track of such dependencies.)
-	    L1 = get_label(T),
-	    St1 = St#state{work = add_work([L1], St#state.work)},
-	    %% Currently, lambda expressions can only be locally
-	    %% allocated, and therefore we have to force copying by
-	    %% treating them as "unsafe" for now.
-	    {[unsafe()], St1};
-	    %% {[singleton(L1)], St1};
-	values ->
-	    visit_list(values_es(T), L, St);
-	cons ->
-	    {[X1, X2], St1} = visit_list([cons_hd(T), cons_tl(T)], L, St),
-	    L1 = get_label(T),
-	    X = make_cons(L1, X1, X2),
-	    %% Also store the values of the elements.
- 	    Hd = get_hd(X),
- 	    Tl = get_tl(X),
- 	    St2 = St1#state{vars = dict:store(L1, [Hd, Tl], St1#state.vars)},
-	    {[X], St2};
-	tuple ->
-	    {Xs, St1} = visit_list(tuple_es(T), L, St),
-	    L1 = get_label(T),
-	    %% Also store the values of the elements.
-	    St2 = St1#state{vars = dict:store(L1, Xs, St1#state.vars)},
-	    {[struct(L1, Xs)], St2};
-	'let' ->
-	    {Xs, St1} = visit(let_arg(T), L, St),
-	    Vars = bind_vars(let_vars(T), Xs, St1#state.vars),
-	    visit(let_body(T), L, St1#state{vars = Vars});
-	seq ->
-	    {_, St1} = visit(seq_arg(T), L, St),
-	    visit(seq_body(T), L, St1);
-	apply ->
-	    {_F, St1} = visit(apply_op(T), L, St),
-	    {As, St2} = visit_list(apply_args(T), L, St1),
-	    L1 = get_label(T),
-	    Ls = get_deps(L1, St#state.dep),
-	    Out = St2#state.out,
-	    Xs1 = join_list([dict:fetch(X, Out) || X <- Ls]),
-	    {Xs1, call_site(Ls, As, St2)};
-	call ->
-	    M = call_module(T),
-	    F = call_name(T),
-	    As = call_args(T),
-	    {_, St1} = visit(M, L, St),
-	    {_, St2} = visit(F, L, St1),
-	    {Xs, St3} = visit_list(As, L, St2),
-	    L1 = get_label(T),
-	    remote_call(M, F, Xs, As, L1, St3);
-	primop ->
- 	    As = primop_args(T),
- 	    {Xs, St1} = visit_list(As, L, St),
- 	    F = atom_val(primop_name(T)),
- 	    primop_call(F, length(Xs), Xs, As, St1);
-	'case' ->
-	    {Xs, St1} = visit(case_arg(T), L, St),
-	    visit_clauses(Xs, case_clauses(T), L, St1);
-	'receive' ->
-	    %% The received value is of course a message, so it
-	    %% is 'empty()', not 'unsafe()'.
-	    X = empty(),
-	    {Xs1, St1} = visit_clauses([X], receive_clauses(T), L, St),
-	    {_, St2} = visit(receive_timeout(T), L, St1),
-	    {Xs2, St3} = visit(receive_action(T), L, St2),
-	    {join(Xs1, Xs2), St3};
-	'try' ->
-	    {Xs1, St1} = visit(try_arg(T), L, St),
-	    X = unsafe(),
-	    Vars = bind_vars(try_vars(T), Xs1, St1#state.vars),
-	    {Xs2, St2} = visit(try_body(T), L, St1#state{vars = Vars}),
-	    EVars = bind_vars(try_evars(T), [X, X, X], St2#state.vars),
-	    {Xs3, St3} = visit(try_handler(T), L, St2#state{vars = EVars}),
-	    {join(Xs2, Xs3), St3};
-	'catch' ->
-	    %% If we catch an exception, we can get unsafe data.
-	    {Xs, St1} = visit(catch_body(T), L, St),
-	    {join([unsafe()], Xs), St1};
-	binary ->
-	    %% Binaries are heap objects, but we don't have special
-	    %% shared-heap allocation operators for them at the moment.
-	    %% They must therefore be treated as unsafe.
-	    {_, St1} = visit_list(binary_segments(T), L, St),
-	    {[unsafe()], St1};
-	bitstr ->
-	    %% The other fields are constant literals.
-	    {_, St1} = visit(bitstr_val(T), L, St),
-	    {_, St2} = visit(bitstr_size(T), L, St1),
-	    {none, St2};
-	letrec ->
-	    %% All the bound funs should be revisited, because the
-	    %% environment might have changed.
-	    Ls = [get_label(F) || {_, F} <- letrec_defs(T)],
-	    St1 = St#state{work = add_work(Ls, St#state.work)},
-	    visit(letrec_body(T), L, St1);
-	module ->
-	    %% We regard a module as a tuple of function variables in
-	    %% the body of a `letrec'.
-	    visit(c_letrec(module_defs(T),
-			   ann_c_tuple([{label, get_label(T)}],
-				       module_exports(T))),
-		  L, St)
-    end.
-
-visit_clause(T, Xs, L, St) ->
-    Vars = bind_pats(clause_pats(T), Xs, St#state.vars),
-    {_, St1} = visit(clause_guard(T), L, St#state{vars = Vars}),
-    visit(clause_body(T), L, St1).
-
-%% We assume correct value-list typing.
-
-visit_list([T | Ts], L, St) ->
-    {Xs, St1} = visit(T, L, St),
-    {Xs1, St2} = visit_list(Ts, L, St1),
-    X = case Xs of
-	    [X1] -> X1;
-	    _ -> empty()
-	end,
-    {[X | Xs1], St2};
-visit_list([], _L, St) ->
-    {[], St}.
-
-visit_clauses(Xs, [T | Ts], L, St) ->
-    {Xs1, St1} = visit_clause(T, Xs, L, St),
-    {Xs2, St2} = visit_clauses(Xs, Ts, L, St1),
-    {join(Xs1, Xs2), St2};
-visit_clauses(_, [], _L, St) ->
-    {none, St}.
-
-bind_defs([{V, F} | Ds], Vars) ->
-    bind_defs(Ds, dict:store(get_label(V), singleton(get_label(F)), Vars));
-bind_defs([], Vars) ->
-    Vars.
-
-bind_pats(Ps, none, Vars) ->
-    bind_pats_single(Ps, empty(), Vars);
-bind_pats(Ps, Xs, Vars) ->
-    if length(Xs) =:= length(Ps) ->
-	    bind_pats_list(Ps, Xs, Vars);
-       true ->
-	    bind_pats_single(Ps, empty(), Vars)
-    end.
-
-%% The lists might not be of the same length.
-
-bind_pats_list([P | Ps], [X | Xs], Vars) ->
-    bind_pats_list(Ps, Xs, bind_pat_vars(P, X, Vars));
-bind_pats_list(Ps, [], Vars) ->
-    bind_pats_single(Ps, empty(), Vars);
-bind_pats_list([], _, Vars) ->
-    Vars.
-
-bind_pats_single([P | Ps], X, Vars) ->
-    bind_pats_single(Ps, X, bind_pat_vars(P, X, Vars));
-bind_pats_single([], _X, Vars) ->
-    Vars.
-
-bind_pat_vars(P, X, Vars) ->
-    case type(P) of
-	var ->
-	    dict:store(get_label(P), X, Vars);
-	literal ->
-	    Vars;
-	cons ->
-	    bind_pats_list([cons_hd(P), cons_tl(P)],
-			   [get_hd(X), get_tl(X)], Vars);
-	tuple ->
-	    case elements(X) of
-		none ->
-		    bind_vars_single(pat_vars(P), X, Vars);
-		Xs ->
-		    bind_pats_list(tuple_es(P), Xs, Vars)
-	    end;
-	binary ->
-	    %% See the handling of binary-expressions.
-	    bind_pats_single(binary_segments(P), unsafe(), Vars);
-	bitstr ->
-	    %% See the handling of binary-expressions.
-	    bind_pats_single([bitstr_val(P), bitstr_size(P)],
-			     unsafe(), Vars);
-	alias ->
-	    P1 = alias_pat(P),
-	    Vars1 = bind_pat_vars(P1, X, Vars),
-	    dict:store(get_label(alias_var(P)), X, Vars1)
-    end.
-
-%%% %% This is the "exact" version of list representation, which simply
-%%% %% mimics the actual cons, head and tail operations.
-%%% make_cons(L, X1, X2) ->
-%%%     struct(L1, [X1, X2]).
-%%% get_hd(X) ->
-%%%     case elements(X) of
-%%% 	none -> X;
-%%% 	[X1 | _] -> X1;
-%%% 	_ -> empty()
-%%%     end.
-%%% get_tl(X) ->
-%%%     case elements(X) of
-%%%  	none -> X;
-%%%  	[_, X2 | _] -> X2;
-%%%  	_ -> empty()
-%%%     end.
-
-%% This version does not unnecessarily confuse spine labels with element
-%% labels, and is safe. However, it loses precision if cons cells are
-%% used for other things than proper lists.
-
-make_cons(L, X1, X2) ->
-    %% join subtypes and cons locations
-    join_single(struct(L, [X1]), X2).
-
-get_hd(X) ->
-    case elements(X) of
- 	none -> X;
- 	[X1 | _] -> X1;    % First element represents list subtype.
- 	_ -> empty()
-    end.
-
-get_tl(X) -> X.   % Tail of X has same type as X.
-
-bind_vars(Vs, none, Vars) ->
-    bind_vars_single(Vs, empty(), Vars);
-bind_vars(Vs, Xs, Vars) ->
-    if length(Vs) =:= length(Xs) ->
-	    bind_vars_list(Vs, Xs, Vars);
-       true ->
-	    bind_vars_single(Vs, empty(), Vars)
-    end.
-
-bind_vars_list([V | Vs], [X | Xs], Vars) ->
-    bind_vars_list(Vs, Xs, dict:store(get_label(V), X, Vars));
-bind_vars_list([], [], Vars) ->
-    Vars.
-
-bind_vars_single([V | Vs], X, Vars) ->
-    bind_vars_single(Vs, X, dict:store(get_label(V), X, Vars));
-bind_vars_single([], _X, Vars) ->
-    Vars.
-
-%% This handles a call site, updating parameter variables with respect
-%% to the actual parameters. The 'external' function is handled
-%% specially, since it can get an arbitrary number of arguments. For our
-%% purposes here, calls to the external function can be ignored.
-
-call_site(Ls, Xs, St) ->
-%%%     io:fwrite("call site: ~w -> ~w (~w).\n", [L, Ls, Xs]),
-    {W, V} = call_site(Ls, Xs, St#state.work, St#state.vars,
-		       St#state.funs, St#state.k),
-    St#state{work = W, vars = V}.
-
-call_site([external | Ls], Xs, W, V, Fs, Limit) ->
-    call_site(Ls, Xs, W, V, Fs, Limit);
-call_site([L | Ls], Xs, W, V, Fs, Limit) ->
-    Vs = fun_vars(dict:fetch(L, Fs)),
-    case bind_args(Vs, Xs, V, Limit) of
-	{V1, true} ->
-	    call_site(Ls, Xs, add_work([L], W), V1, Fs, Limit);
-	{V1, false} ->
-	    call_site(Ls, Xs, W, V1, Fs, Limit)
-    end;
-call_site([], _, W, V, _, _) ->
-    {W, V}.
-
-add_dep(Source, Target, Deps) ->
-    case dict:find(Source, Deps) of
-	{ok, X} ->
-	    case set__is_member(Target, X) of
-		true ->
-		    Deps;
-		false ->
-%%%		    io:fwrite("new dep: ~w <- ~w.\n", [Target, Source]),
-		    dict:store(Source, set__add(Target, X), Deps)
-	    end;
-	error ->
-%%%	    io:fwrite("new dep: ~w <- ~w.\n", [Target, Source]),
-	    dict:store(Source, set__singleton(Target), Deps)
-    end.
-
-%% If the arity does not match the call, nothing is done here.
-
-bind_args(Vs, Xs, Vars, Limit) ->
-    if length(Vs) =:= length(Xs) ->
-	    bind_args(Vs, Xs, Vars, Limit, false);
-       true ->
-	    {Vars, false}
-    end.
-
-bind_args([V | Vs], [X | Xs], Vars, Limit, Ch) ->
-    L = get_label(V),
-    {Vars1, Ch1} = bind_arg(L, X, Vars, Limit, Ch),
-    bind_args(Vs, Xs, Vars1, Limit, Ch1);
-bind_args([], [], Vars, _Limit, Ch) ->
-    {Vars, Ch}.
-
-%% bind_arg(L, X, Vars, Limit) ->
-%%     bind_arg(L, X, Vars, Limit, false).
-
-bind_arg(L, X, Vars, Limit, Ch) ->
-    X0 = dict:fetch(L, Vars),
-    X1 = limit_single(join_single(X, X0), Limit),
-    case equal_single(X0, X1) of
-	true ->
-	    {Vars, Ch};
-	false ->
-%%%     	    io:fwrite("arg (~w) changed: ~w <- ~w + ~w.\n",
-%%%      		      [L, X1, X0, X]),
-	    {dict:store(L, X1, Vars), true}
-    end.
-
-%% This handles escapes from things like primops and remote calls.
-
-escape(Xs, Ns, St) ->
-    escape(Xs, Ns, 1, St).
-
-escape([_ | Xs], Ns=[N1 | _], N, St) when is_integer(N1), N1 > N ->
-    escape(Xs, Ns, N + 1, St);
-escape([X | Xs], [N | Ns], N, St) ->
-    Vars = St#state.vars,
-    X0 = dict:fetch(escape, Vars),
-    X1 = join_single(X, X0),
-    case equal_single(X0, X1) of
-	true ->
-	    escape(Xs, Ns, N + 1, St);
-	false ->
-%%%    	    io:fwrite("escape changed: ~w <- ~w + ~w.\n", [X1, X0, X]),
-	    Vars1 = dict:store(escape, X1, Vars),
-	    escape(Xs, Ns, N + 1, St#state{vars = Vars1})
-    end;
-escape(Xs, [_ | Ns], N, St) ->
-    escape(Xs, Ns, N + 1, St);
-escape(_, _, _, St) ->
-    St.
-
-%% Handle primop calls: (At present, we assume that all unknown calls
-%% yield exactly one value. This might have to be changed.)
-
-primop_call(F, A, Xs, _As, St0) ->
-    %% St1 = case is_escape_op(F, A) of
-    %%	      [] -> St0;
-    %%	      Ns -> escape(Xs, Ns, St0)
-    %%	  end,
-    St1 = St0,
-    case is_imm_op(F, A) of
-	true ->
-	    {[empty()], St1};
-	false ->
-	    call_unknown(Xs, St1)
-    end.
-
-%% Handle remote-calls: (At present, we assume that all unknown calls
-%% yield exactly one value. This might have to be changed.)
-
-remote_call(M, F, Xs, As, L, St) ->
-    case is_c_atom(M) andalso is_c_atom(F) of
-	true ->
-	    remote_call_1(atom_val(M), atom_val(F), length(Xs),
-			  Xs, As, L, St);
-	false ->
-	    %% Unknown function
-	    call_unknown(Xs, St)
-    end.
-
-%% When calling an unknown function, we assume that the result does
-%% *not* contain any of the constructors in its arguments (but it could
-%% return locally allocated data that we don't know about). Note that
-%% even a "pure" function can still cons up new data.
-
-call_unknown(_Xs, St) ->
-    {[unsafe()], St}.
-
-%% We need to handle some important standard functions in order to get
-%% decent precision.
-%% TODO: foldl, map, mapfoldl
-
-remote_call_1(erlang, hd, 1, [X], _As, _L, St) ->
-    {[get_hd(X)], St};
-remote_call_1(erlang, tl, 1, [X], _As, _L, St) ->
-    {[get_tl(X)], St};
-remote_call_1(erlang, element, 2, [_,X], [N|_], _L, St) ->
-    case elements(X) of
-	none -> {[X], St};
-	Xs ->
-	    case is_c_int(N) of
-		true ->
-		    N1 = int_val(N),
-		    if is_integer(N1), 1 =< N1, N1 =< length(Xs) ->
-			    {[nth(N1, Xs)], St};
-		       true ->
-			    {none, St}
-		    end;
-		false ->
-		    %% Even if we don't know which element is selected,
-		    %% we know that the top level is never part of the
-		    %% returned value.
-		    {[join_single_list(Xs)], St}
-	    end
-    end;
-remote_call_1(erlang, setelement, 3, [_,X, Y], [N|_], L, St) ->
-    %% The constructor gets the label of the call operation.
-    case elements(X) of
-	none -> {[join_single(singleton(L), join_single(X, Y))], St};
-	Xs ->
-	    case is_c_int(N) of
-		true ->
-		    N1 = int_val(N),
-		    if is_integer(N1), 1 =< N1, N1 =< length(Xs) ->
-			    Xs1 = set_nth(N1, Y, Xs),
-			    {[struct(L, Xs1)], St};
-		       true ->
-			    {none, St}
-		    end;
-		false ->
-		    %% Even if we don't know which element is selected,
-		    %% we know that the top level is never part of the
-		    %% returned value (a new tuple is always created).
-		    Xs1 = [join_single(Y, X1) || X1 <- Xs],
-		    {[struct(L, Xs1)], St}
-	    end
-    end;
-remote_call_1(erlang, '++', 2, [X1,X2], _As, _L, St) ->
-    %% Note: this is unsafe for non-proper lists! (See make_cons/3).
-    %% No safe version is implemented.
-    {[join_single(X1, X2)], St};
-remote_call_1(erlang, '--', 2, [X1,_X2], _As, _L, St) ->
-    {[X1], St};
-remote_call_1(lists, append, 2, Xs, As, L, St) ->
-    remote_call_1(erlang, '++', 2, Xs, As, L, St);
-remote_call_1(lists, subtract, 2, Xs, As, L, St) ->
-    remote_call_1(erlang, '--', 2, Xs, As, L, St);
-remote_call_1(M, F, A, Xs, _As, _L, St0) ->
-    St1 = case is_escape_op(M, F, A) of
-	      [] -> St0;
-	      Ns -> escape(Xs, Ns, St0)
-	  end,
-    case is_imm_op(M, F, A) of
-	true ->
-	    {[empty()], St1};
-	false ->
-	    call_unknown(Xs, St1)
-    end.
-
-%% 1-based n:th-element list selector and update function.
-
-nth(1, [X | _Xs]) -> X;
-nth(N, [_X | Xs]) when N > 1 -> nth(N - 1, Xs).
-
-set_nth(1, Y, [_X | Xs]) -> [Y | Xs];
-set_nth(N, Y, [X | Xs]) when N > 1 -> [X | set_nth(N - 1, Y, Xs)].
-
-%% Domain: none | [V], where V = {S, none} | {S, [V]}, S = set(integer()).
-
-join(none, Xs2) -> Xs2;
-join(Xs1, none) -> Xs1;
-join(Xs1, Xs2) ->
-    if length(Xs1) =:= length(Xs2) ->
-	    join_1(Xs1, Xs2);
-       true ->
-	    none
-    end.
-
-join_1([X1 | Xs1], [X2 | Xs2]) ->
-    [join_single(X1, X2) | join_1(Xs1, Xs2)];
-join_1([], []) ->
-    [].
-
-join_list([Xs | Xss]) ->
-    join(Xs, join_list(Xss));
-join_list([]) ->
-    none.
-
-empty() -> {set__new(), []}.
-
-singleton(X) -> {set__singleton(X), []}.
-
-struct(X, Xs) -> {set__singleton(X), Xs}.
-
-elements({_, Xs}) -> Xs.
-
-unsafe() -> {set__singleton(unsafe), none}.
-
-equal(none, none) -> true;
-equal(none, _) -> false;
-equal(_, none) -> false;
-equal(X1, X2) -> equal_1(X1, X2).
-
-equal_1([X1 | Xs1], [X2 | Xs2]) ->
-    equal_single(X1, X2) andalso equal_1(Xs1, Xs2);
-equal_1([], []) -> true;
-equal_1(_, _) -> false.
-
-equal_single({S1, none}, {S2, none}) ->
-    set__equal(S1, S2);
-equal_single({_, none}, _) ->
-    false;
-equal_single(_, {_, none}) ->
-    false;
-equal_single({S1, Vs1}, {S2, Vs2}) ->
-    set__equal(S1, S2) andalso equal_single_lists(Vs1, Vs2).
-
-equal_single_lists([X1 | Xs1], [X2 | Xs2]) ->
-    equal_single(X1, X2) andalso equal_single_lists(Xs1, Xs2);
-equal_single_lists([], []) ->
-    true;
-equal_single_lists(_, _) ->
-    false.
-
-join_single({S, none}, V) ->
-    {set__union(S, labels(V)), none};
-join_single(V, {S, none}) ->
-    {set__union(S, labels(V)), none};
-join_single({S1, Vs1}, {S2, Vs2}) ->
-    {set__union(S1, S2), join_single_lists(Vs1, Vs2)}.
-
-join_single_list([V | Vs]) ->
-    join_single(V, join_single_list(Vs));
-join_single_list([]) ->
-    empty().
-
-%% If one list has more elements that the other, and N is the length of
-%% the longer list, then the result has N elements.
-
-join_single_lists([V1], [V2]) ->
-    [join_single(V1, V2)];
-join_single_lists([V1 | Vs1], [V2 | Vs2]) ->
-    [join_single(V1, V2) | join_single_lists(Vs1, Vs2)];
-join_single_lists([], Vs) -> Vs;
-join_single_lists(Vs, []) -> Vs.
-
-collapse(V) ->
-    {labels(V), none}.
-
-%% collapse_list([]) ->
-%%     empty();
-%% collapse_list(Vs) ->
-%%     {labels_list(Vs), none}.
-
-labels({S, none}) -> S;
-labels({S, []}) -> S;
-labels({S, Vs}) -> set__union(S, labels_list(Vs)).
-
-labels_list([V]) ->
-    labels(V);
-labels_list([V | Vs]) ->
-    set__union(labels(V), labels_list(Vs)).
-
-limit(none, _K) -> none;
-limit(X, K) -> limit_list(X, K).
-
-limit_list([X | Xs], K) ->
-    [limit_single(X, K) | limit_list(Xs, K)];
-limit_list([], _) ->
-    [].
-
-limit_single({_, none} = V, _K) ->
-    V;
-limit_single({_, []} = V, _K) ->
-    V;
-limit_single({S, Vs}, K) when K > 0 ->
-    {S, limit_list(Vs, K - 1)};
-limit_single(V, _K) ->
-    collapse(V).
-
-%% Set abstraction for label sets in the domain.
-
-%% set__is_empty([]) -> true;
-%% set__is_empty(_) -> false.
-
-set__new() -> [].
-
-set__singleton(X) -> [X].
-
-set__to_list(S) -> S.
-
-%% set__from_list(S) -> ordsets:from_list(S).
-
-set__union(X, Y) -> ordsets:union(X, Y).
-
-set__add(X, S) -> ordsets:add_element(X, S).
-
-set__is_member(X, S) -> ordsets:is_element(X, S).    
-
-%% set__subtract(X, Y) -> ordsets:subtract(X, Y).
-
-set__equal(X, Y) -> X =:= Y.
-
-%% A simple but efficient functional queue.
-
-queue__new() -> {[], []}.
-
-queue__put(X, {In, Out}) -> {[X | In], Out}.
-
-queue__get({In, [X | Out]}) -> {ok, X, {In, Out}};
-queue__get({[], _}) -> empty;
-queue__get({In, _}) ->
-    [X | In1] = lists:reverse(In),
-    {ok, X, {[], In1}}.
-
-%% The work list - a queue without repeated elements.
-
-init_work() ->
-    {queue__new(), sets:new()}.
-
-add_work(Ls, {Q, Set}) ->
-    add_work(Ls, Q, Set).
-
-%% Note that the elements are enqueued in order.
-
-add_work([L | Ls], Q, Set) ->
-    case sets:is_element(L, Set) of
-	true ->
-	    add_work(Ls, Q, Set);
-	false ->
-	    add_work(Ls, queue__put(L, Q), sets:add_element(L, Set))
-    end;
-add_work([], Q, Set) ->
-    {Q, Set}.
-
-take_work({Queue0, Set0}) ->
-    case queue__get(Queue0) of
-	{ok, L, Queue1} ->
-	    Set1 = sets:del_element(L, Set0),
-	    {ok, L, {Queue1, Set1}};
-	empty ->
-	    none
-    end.
-
-get_deps(L, Dep) ->
-    case dict:find(L, Dep) of
-	{ok, Ls} -> Ls;
-	error -> []
-    end.
-
-%% Escape operators may let their arguments escape. For this analysis,
-%% only send-operations are considered as causing escapement, and only
-%% in specific arguments.
-
-%% is_escape_op(_F, _A) -> [].
-
--spec is_escape_op(atom(), atom(), arity()) -> [arity()].
-
-is_escape_op(erlang, '!', 2) -> [2];
-is_escape_op(erlang, send, 2) -> [2];
-is_escape_op(erlang, spawn, 1) -> [1];
-is_escape_op(erlang, spawn, 3) -> [3];
-is_escape_op(erlang, spawn, 4) -> [4];
-is_escape_op(erlang, spawn_link, 3) -> [3];
-is_escape_op(erlang, spawn_link, 4) -> [4];
-is_escape_op(_M, _F, _A) -> [].
-
-%% "Immediate" operators will never return heap allocated data. This is
-%% of course true for operators that never return, like 'exit/1'. (Note
-%% that floats are always heap allocated objects, and that most integer
-%% arithmetic can return a bignum on the heap.)
-
--spec is_imm_op(atom(), arity()) -> boolean().
-
-is_imm_op(match_fail, 1) -> true; 
-is_imm_op(_, _) -> false.
-
--spec is_imm_op(atom(), atom(), arity()) -> boolean().
-
-is_imm_op(erlang, self, 0) -> true;
-is_imm_op(erlang, '=:=', 2) -> true;
-is_imm_op(erlang, '==', 2) -> true;
-is_imm_op(erlang, '=/=', 2) -> true;
-is_imm_op(erlang, '/=', 2) -> true;
-is_imm_op(erlang, '<', 2) -> true;
-is_imm_op(erlang, '=<', 2) -> true;
-is_imm_op(erlang, '>', 2) -> true;
-is_imm_op(erlang, '>=', 2) -> true;
-is_imm_op(erlang, 'and', 2) -> true;
-is_imm_op(erlang, 'or', 2) -> true;
-is_imm_op(erlang, 'xor', 2) -> true;
-is_imm_op(erlang, 'not', 1) -> true;
-is_imm_op(erlang, is_alive, 0) -> true;
-is_imm_op(erlang, is_atom, 1) -> true;
-is_imm_op(erlang, is_binary, 1) -> true;
-is_imm_op(erlang, is_builtin, 3) -> true;
-is_imm_op(erlang, is_float, 1) -> true;
-is_imm_op(erlang, is_function, 1) -> true;
-is_imm_op(erlang, is_integer, 1) -> true;
-is_imm_op(erlang, is_list, 1) -> true;
-is_imm_op(erlang, is_number, 1) -> true;
-is_imm_op(erlang, is_pid, 1) -> true;
-is_imm_op(erlang, is_port, 1) -> true;
-is_imm_op(erlang, is_process_alive, 1) -> true;
-is_imm_op(erlang, is_reference, 1) -> true;
-is_imm_op(erlang, is_tuple, 1) -> true;
-is_imm_op(erlang, length, 1) -> true;    % never a bignum
-is_imm_op(erlang, list_to_atom, 1) -> true;
-is_imm_op(erlang, node, 0) -> true;
-is_imm_op(erlang, node, 1) -> true;
-is_imm_op(erlang, throw, 1) -> true;
-is_imm_op(erlang, exit, 1) -> true;
-is_imm_op(erlang, error, 1) -> true;
-is_imm_op(erlang, error, 2) -> true;
-is_imm_op(_M, _F, _A) -> false.
diff --git a/lib/hipe/cerl/erl_bif_types.erl b/lib/hipe/cerl/erl_bif_types.erl
index a3a936322a..bfffb8db41 100644
--- a/lib/hipe/cerl/erl_bif_types.erl
+++ b/lib/hipe/cerl/erl_bif_types.erl
@@ -585,6 +585,13 @@ type(erlang, float, 1, Xs, Opaques) ->
 %% Guard bif, needs to be here.
 type(erlang, floor, 1, Xs, Opaques) ->
   strict(erlang, floor, 1, Xs, fun (_) -> t_integer() end, Opaques);
+%% Primop, needs to be somewhere.
+type(erlang, build_stacktrace, 0, _, _Opaques) ->
+  t_list(t_tuple([t_module(),
+                  t_atom(),
+                  t_sup([t_arity(),t_list()]),
+                  t_list(t_sup([t_tuple([t_atom('file'),t_string()]),
+                                t_tuple([t_atom('line'),t_pos_integer()])]))]));
 %% Guard bif, needs to be here.
 type(erlang, hd, 1, Xs, Opaques) ->
   strict(erlang, hd, 1, Xs, fun ([X]) -> t_cons_hd(X) end, Opaques);
@@ -1701,24 +1708,6 @@ type(maps, size, 1, Xs, Opaques) ->
 		 t_from_range(LowerBound, UpperBound)
 	     end
 	 end, Opaques);
-type(maps, to_list, 1, Xs, Opaques) ->
-  strict(maps, to_list, 1, Xs,
-	 fun ([Map]) ->
-	     DefK = t_map_def_key(Map, Opaques),
-	     DefV = t_map_def_val(Map, Opaques),
-	     Pairs = t_map_entries(Map, Opaques),
-	     EType = lists:foldl(
-		       fun({K,_,V},EType0) ->
-			   case t_is_none(V) of
-			     true -> t_subtract(EType0, t_tuple([K,t_any()]));
-			     false -> t_sup(EType0, t_tuple([K,V]))
-			   end
-		       end, t_tuple([DefK, DefV]), Pairs),
-	     case t_is_none(EType) of
-	       true -> t_nil();
-	       false -> t_list(EType)
-	     end
-	 end, Opaques);
 type(maps, update, 3, Xs, Opaques) ->
   strict(maps, update, 3, Xs,
 	 fun ([Key, Value, Map]) ->
@@ -1903,7 +1892,8 @@ infinity_div(Number1, Number2) when is_integer(Number1), is_integer(Number2) ->
 
 infinity_bsl(pos_inf, _) -> pos_inf;
 infinity_bsl(neg_inf, _) -> neg_inf;
-infinity_bsl(Number, pos_inf) when is_integer(Number), Number >= 0 -> pos_inf;
+infinity_bsl(0, pos_inf) -> 0;
+infinity_bsl(Number, pos_inf) when is_integer(Number), Number > 0 -> pos_inf;
 infinity_bsl(Number, pos_inf) when is_integer(Number) -> neg_inf;
 infinity_bsl(Number, neg_inf) when is_integer(Number), Number >= 0 -> 0;
 infinity_bsl(Number, neg_inf) when is_integer(Number) -> -1;
@@ -1992,9 +1982,11 @@ arith_abs(X1, Opaques) ->
         case infinity_geq(Min1, 0) of
           true -> {Min1, Max1};
           false ->
+            NegMin1 = infinity_inv(Min1),
+            NegMax1 = infinity_inv(Max1),
             case infinity_geq(Max1, 0) of
-              true  -> {0, infinity_inv(Min1)};
-              false -> {infinity_inv(Max1), infinity_inv(Min1)}
+              true  -> {0, max(NegMin1, Max1)};
+              false -> {NegMax1, NegMin1}
             end
         end,
       t_from_range(NewMin, NewMax)
@@ -2351,6 +2343,9 @@ arg_types(erlang, float, 1) ->
 %% Guard bif, needs to be here.
 arg_types(erlang, floor, 1) ->
   [t_number()];
+%% Primop, needs to be somewhere.
+arg_types(erlang, build_stacktrace, 0) ->
+  [];
 %% Guard bif, needs to be here.
 arg_types(erlang, hd, 1) ->
   [t_cons()];
@@ -2648,8 +2643,6 @@ arg_types(maps, put, 3) ->
   [t_any(), t_any(), t_map()];
 arg_types(maps, size, 1) ->
   [t_map()];
-arg_types(maps, to_list, 1) ->
-  [t_map()];
 arg_types(maps, update, 3) ->
   [t_any(), t_any(), t_map()];
 arg_types(M, F, A) when is_atom(M), is_atom(F),
diff --git a/lib/hipe/cerl/erl_types.erl b/lib/hipe/cerl/erl_types.erl
index d8d707c05e..8a609ef911 100644
--- a/lib/hipe/cerl/erl_types.erl
+++ b/lib/hipe/cerl/erl_types.erl
@@ -1877,6 +1877,7 @@ t_map_put(KV, Map, Opaques) ->
 
 %% Key and Value are *not* unopaqued, but the map is
 map_put(_, ?none, _) -> ?none;
+map_put(_, ?unit, _) -> ?none;
 map_put({Key, Value}, ?map(Pairs,DefK,DefV), Opaques) ->
   case t_is_none_or_unit(Key) orelse t_is_none_or_unit(Value) of
     true -> ?none;
@@ -1902,6 +1903,7 @@ t_map_update(KV, Map) ->
 -spec t_map_update({erl_type(), erl_type()}, erl_type(), opaques()) -> erl_type().
 
 t_map_update(_, ?none, _) -> ?none;
+t_map_update(_, ?unit, _) -> ?none;
 t_map_update(KV={Key, _}, M, Opaques) ->
   case t_is_subtype(t_atom('true'), t_map_is_key(Key, M, Opaques)) of
     false -> ?none;
@@ -1922,6 +1924,7 @@ t_map_get(Key, Map, Opaques) ->
 	    end).
 
 map_get(_, ?none) -> ?none;
+map_get(_, ?unit) -> ?none;
 map_get(Key, ?map(Pairs, DefK, DefV)) ->
   DefRes =
     case t_do_overlap(DefK, Key) of
@@ -1957,6 +1960,7 @@ t_map_is_key(Key, Map, Opaques) ->
 	    end).
 
 map_is_key(_, ?none) -> ?none;
+map_is_key(_, ?unit) -> ?none;
 map_is_key(Key, ?map(Pairs, DefK, _DefV)) ->
   case is_singleton_type(Key) of
     true ->
@@ -2347,6 +2351,8 @@ t_from_range(X, Y) ->
 
 -else.
 
+t_from_range(pos_inf, pos_inf) -> ?integer_pos;
+t_from_range(neg_inf, neg_inf) -> ?integer_neg;
 t_from_range(neg_inf, pos_inf) -> t_integer();
 t_from_range(neg_inf, Y) when is_integer(Y), Y < 0  -> ?integer_neg;
 t_from_range(neg_inf, Y) when is_integer(Y), Y >= 0 -> t_integer();
@@ -2379,6 +2385,8 @@ t_from_range(pos_inf, neg_inf) -> t_none().
 
 -spec t_from_range_unsafe(rng_elem(), rng_elem()) -> erl_type().
 
+t_from_range_unsafe(pos_inf, pos_inf) -> ?integer_pos;
+t_from_range_unsafe(neg_inf, neg_inf) -> ?integer_neg;
 t_from_range_unsafe(neg_inf, pos_inf) -> t_integer();
 t_from_range_unsafe(neg_inf, Y) -> ?int_range(neg_inf, Y);
 t_from_range_unsafe(X, pos_inf) -> ?int_range(X, pos_inf);
diff --git a/lib/hipe/doc/src/Makefile b/lib/hipe/doc/src/Makefile
index 63154abd6a..1c774d3357 100644
--- a/lib/hipe/doc/src/Makefile
+++ b/lib/hipe/doc/src/Makefile
@@ -38,7 +38,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN)
 XML_APPLICATION_FILES =  ref_man.xml
 XML_REF3_FILES =
 
-XML_PART_FILES =
+XML_PART_FILES = hipe_app.xml
 XML_CHAPTER_FILES = notes.xml
 
 BOOK_FILES = book.xml
diff --git a/lib/hipe/doc/src/hipe_app.xml b/lib/hipe/doc/src/hipe_app.xml
index e489d155c3..fc42ecd97d 100644
--- a/lib/hipe/doc/src/hipe_app.xml
+++ b/lib/hipe/doc/src/hipe_app.xml
@@ -47,6 +47,96 @@
       Details on HiPE compiler options are given by <c>hipe:help_options()</c>.</p>
   </description>  
   <section>
+    <title>Feature Limitations</title>
+    <p>
+      The HiPE compiler is in general compliant with the normal BEAM compiler,
+      with respect to semantic behavior. There are however features in the BEAM compiler
+      and the runtime system that have limited or no support for HiPE compiled modules.
+    </p>
+    <taglist>
+      <tag>Stack traces</tag>
+      <item><p>Stack traces returned from <seealso marker="erts:erlang#get_stacktrace/0">
+      <c>erlang:get_stacktrace/0</c></seealso> or as part of <c>'EXIT'</c> terms
+      can look incomplete if HiPE compiled functions are involved. Typically a stack trace
+      will contain only BEAM compiled functions or only HiPE compiled functions, depending
+      on where the exception was raised.</p>
+      <p>Source code line numbers in stack traces are also not supported by HiPE compiled functions.</p>
+      </item>
+
+      <tag>Tracing</tag>
+      <item><p>Erlang call trace is not supported by HiPE. Calling
+      <seealso marker="erts:erlang#trace_pattern/3"><c>erlang:trace_pattern({M,F,A}, ...)</c></seealso>
+      does not have any effect on HiPE compiled modules.</p>
+      </item>
+
+      <tag>NIFs</tag>
+      <item><p>Modules compiled with HiPE can not call <seealso marker="erts:erlang#load_nif-2">
+      <c>erlang:load_nif/2</c></seealso> to load NIFs.</p>
+      </item>
+
+      <tag>-on_load</tag>
+      <item><p>Modules compiled with HiPE can not use
+      <seealso marker="doc/reference_manual:code_loading#on_load"><c>-on_load()</c></seealso>
+      directives.</p>
+      </item>
+    </taglist>
+
+  </section>
+  <section>
+    <title>Performance Limitations</title>
+    <p>
+      The HiPE compiler does in general produce faster code than the
+      BEAM compiler. There are however some situation when HiPE
+      compiled code will perform worse than BEAM code.
+    </p>
+    <taglist>
+      <tag>Mode switches</tag>
+      <item><p>Every time a process changes from executing code in a
+      HiPE compiled module to a BEAM compiled module (or vice versa),
+      it will do a mode switch. This involves a certain amount of
+      CPU overhead which can have a negative net impact if the
+      process is switching back and forth without getting enough done in
+      each mode.</p>
+      </item>
+
+      <tag>Optimization for <c>receive</c> with unique references</tag>
+      <item>
+	<p>
+	  The BEAM compiler can do an optimization when a receive
+	  statement is only waiting for messages containing a reference
+	  created before the receive. All messages that existed in the
+	  queue when the reference was created will be bypassed, as they
+	  cannot possibly contain the reference. HiPE currently has an
+	  optimization similar this, but it is not guaranteed to
+	  bypass all messages. In the worst case scenario it, cannot
+	  bypass any messages at all.
+	</p>
+	<p>
+	  An example of this is when <c>gen_server:call()</c> waits for
+	  the reply message.
+	</p>
+      </item>
+
+    </taglist>
+  </section>
+  <section>
+    <title>Stability Issues</title>
+    <taglist>
+      <tag>Not yielding in <c>receive</c> statements</tag>
+      <item>
+	<p>HiPE will not yield in <c>receive</c> statements where
+	appropriate. If a process have lots of signals in its signal
+	queue and execute a HiPE compiled <c>receive</c> statement,
+	the scheduler thread performing the execution may be stuck
+	in the <c>receive</c> statement for a very long time. This
+	can in turn cause various severe issues such as for example
+	prevent the runtime system from being able to release
+	memory.
+	</p>
+      </item>
+    </taglist>
+  </section>
+  <section>
     <title>SEE ALSO</title>
     <p>
       <seealso marker="stdlib:c">c(3)</seealso>, 
diff --git a/lib/hipe/doc/src/notes.xml b/lib/hipe/doc/src/notes.xml
index eadaee50e2..c190a89260 100644
--- a/lib/hipe/doc/src/notes.xml
+++ b/lib/hipe/doc/src/notes.xml
@@ -31,6 +31,78 @@
   </header>
   <p>This document describes the changes made to HiPE.</p>
 
+<section><title>Hipe 3.17.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix HiPE bug for binary constructs like
+	    <c>&lt;&lt;X/utf8&gt;&gt;</c> which could in rare cases
+	    cause faulty results or VM crash.</p>
+          <p>
+	    This fix affects both the <c>hipe</c> compiler and
+	    <c>erts</c> runtime in an <em>incompatible</em> way. Old
+	    hipe compiled files need to be recompiled to load and run
+	    properly as native.</p>
+          <p>
+	    *** POTENTIAL INCOMPATIBILITY ***</p>
+          <p>
+	    Own Id: OTP-14850 Aux Id: PR-1664 </p>
+        </item>
+        <item>
+	    <p>The BEAM compiler chooses not to perform tailcall
+	    optimisations for some calls in tail position, for
+	    example to some built-in functions. However, when the
+	    ErLLVM HiPE backend is used, LLVM may choose to perform
+	    tailcall optimisation on these calls, breaking the
+	    expected semantics.</p>
+	    <p>To preserve the precise semantics exhibited by BEAM,
+	    the 'notail' marker, present in LLVM since version 3.8,
+	    is added to call instructions that BEAM has not turned
+	    into tail calls, which inhibits LLVM from performing
+	    tail-call optimisation in turn.</p>
+          <p>
+	    Own Id: OTP-14886</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Hipe 3.17</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix bug for hipe compiled code using
+	    <c>&lt;&lt;X/utf32&gt;&gt;</c> binary construction that
+	    could cause faulty result or even VM crash.</p>
+          <p>
+	    On architectures other than x86_64, code need to be
+	    recompiled to benefit from this fix.</p>
+          <p>
+	    Own Id: OTP-14740</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Added documentation about limitations of hipe compared to
+	    beam compiled code.</p>
+          <p>
+	    Own Id: OTP-14767</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Hipe 3.16.1</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/hipe/icode/hipe_beam_to_icode.erl b/lib/hipe/icode/hipe_beam_to_icode.erl
index 167f5c67bb..f429d40272 100644
--- a/lib/hipe/icode/hipe_beam_to_icode.erl
+++ b/lib/hipe/icode/hipe_beam_to_icode.erl
@@ -415,11 +415,13 @@ trans_fun([{wait_timeout,{_,Lbl},Reg}|Instructions], Env) ->
   SuspTmout = hipe_icode:mk_if(suspend_msg_timeout,[],
 			       map_label(Lbl),hipe_icode:label_name(DoneLbl)),
   Movs ++ [SetTmout, SuspTmout, DoneLbl | trans_fun(Instructions,Env1)];
-%%--- recv_mark/1 & recv_set/1 ---  XXX: Handle better??
+%%--- recv_mark/1 & recv_set/1 ---
 trans_fun([{recv_mark,{f,_}}|Instructions], Env) ->
-  trans_fun(Instructions,Env);
+  Mark = hipe_icode:mk_primop([],recv_mark,[]),
+  [Mark | trans_fun(Instructions,Env)];
 trans_fun([{recv_set,{f,_}}|Instructions], Env) ->
-  trans_fun(Instructions,Env);
+  Set = hipe_icode:mk_primop([],recv_set,[]),
+  [Set | trans_fun(Instructions,Env)];
 %%--------------------------------------------------------------------
 %%--- Translation of arithmetics {bif,ArithOp, ...} ---
 %%--------------------------------------------------------------------
@@ -603,6 +605,16 @@ trans_fun([{get_list,List,Head,Tail}|Instructions], Env) ->
       ?error_msg("hd and tl regs identical in get_list~n",[]),
       erlang:error(not_handled)
   end;
+%%--- get_hd ---
+trans_fun([{get_hd,List,Head}|Instructions], Env) ->
+  TransList = [trans_arg(List)],
+  I = hipe_icode:mk_primop([mk_var(Head)],unsafe_hd,TransList),
+  [I | trans_fun(Instructions,Env)];
+%%--- get_tl ---
+trans_fun([{get_tl,List,Tail}|Instructions], Env) ->
+  TransList = [trans_arg(List)],
+  I = hipe_icode:mk_primop([mk_var(Tail)],unsafe_tl,TransList),
+  [I | trans_fun(Instructions,Env)];
 %%--- get_tuple_element ---
 trans_fun([{get_tuple_element,Xreg,Index,Dst}|Instructions], Env) ->
   I = hipe_icode:mk_primop([mk_var(Dst)],
@@ -794,7 +806,7 @@ trans_fun([{bs_append,{f,Lbl},Size,W,R,U,Binary,{field_flags,F},Dst}|
   SizeArg = trans_arg(Size),
   BinArg = trans_arg(Binary),
   IcodeDst = mk_var(Dst),
-  Offset = mk_var(reg),
+  Offset = mk_var(reg_gcsafe),
   Base = mk_var(reg),
   trans_bin_call({hipe_bs_primop,{bs_append,W,R,U,F}},Lbl,[SizeArg,BinArg],
 		[IcodeDst,Base,Offset],
@@ -805,7 +817,7 @@ trans_fun([{bs_private_append,{f,Lbl},Size,U,Binary,{field_flags,F},Dst}|
   SizeArg = trans_arg(Size),
   BinArg = trans_arg(Binary),
   IcodeDst = mk_var(Dst),
-  Offset = mk_var(reg),
+  Offset = mk_var(reg_gcsafe),
   Base = mk_var(reg),
   trans_bin_call({hipe_bs_primop,{bs_private_append,U,F}},
 		 Lbl,[SizeArg,BinArg],
@@ -844,7 +856,7 @@ trans_fun([{bs_init2,{f,Lbl},Size,_Words,_LiveRegs,{field_flags,Flags0},X}|
 	   Instructions], Env) ->
   Dst = mk_var(X),
   Flags = resolve_native_endianess(Flags0),
-  Offset = mk_var(reg),
+  Offset = mk_var(reg_gcsafe),
   Base = mk_var(reg),
   {Name, Args} =
     case Size of
@@ -860,7 +872,7 @@ trans_fun([{bs_init_bits,{f,Lbl},Size,_Words,_LiveRegs,{field_flags,Flags0},X}|
 	   Instructions], Env) ->
   Dst = mk_var(X),
   Flags = resolve_native_endianess(Flags0),
-  Offset = mk_var(reg),
+  Offset = mk_var(reg_gcsafe),
   Base = mk_var(reg),
   {Name, Args} =
     case Size of
@@ -1157,6 +1169,17 @@ trans_fun([{put_map_exact,{f,Lbl},Map,Dst,_N,{list,Pairs}}|Instructions], Env) -
 	  gen_put_map_instrs(new, exact, TempMapVar, Dst, new, Pairs, Env1)
       end,
   [MapMove, TempMapMove, PutInstructions | trans_fun(Instructions, Env2)];
+%%--- build_stacktrace ---
+trans_fun([build_stacktrace|Instructions], Env) ->
+  Vars = [mk_var({x,0})], %{x,0} is implict arg and dst
+  [hipe_icode:mk_primop(Vars,build_stacktrace,Vars),
+   trans_fun(Instructions, Env)];
+%%--- raw_raise ---
+trans_fun([raw_raise|Instructions], Env) ->
+  Vars = [mk_var({x,0}),mk_var({x,1}),mk_var({x,2})],
+  Dst = [mk_var({x,0})],
+  [hipe_icode:mk_primop(Dst,raw_raise,Vars) |
+   trans_fun(Instructions, Env)];
 %%--------------------------------------------------------------------
 %%--- ERROR HANDLING ---
 %%--------------------------------------------------------------------
@@ -1505,7 +1528,10 @@ clone_dst(Dest) ->
   New = 
     case hipe_icode:is_reg(Dest) of
       true ->
-	mk_var(reg);
+	case hipe_icode:reg_is_gcsafe(Dest) of
+	  true -> mk_var(reg_gcsafe);
+	  false -> mk_var(reg)
+	end;
       false ->
 	true = hipe_icode:is_var(Dest),	      
 	mk_var(new)
@@ -2126,7 +2152,12 @@ mk_var(reg) ->
   T = hipe_gensym:new_var(icode),
   V = (5*T)+4,
   hipe_gensym:update_vrange(icode,V),
-  hipe_icode:mk_reg(V).
+  hipe_icode:mk_reg(V);
+mk_var(reg_gcsafe) ->
+  T = hipe_gensym:new_var(icode),
+  V = (5*T)+4, % same namespace as 'reg'
+  hipe_gensym:update_vrange(icode,V),
+  hipe_icode:mk_reg_gcsafe(V).
 
 %%-----------------------------------------------------------------------
 %% Make an icode label of proper type
diff --git a/lib/hipe/icode/hipe_icode.erl b/lib/hipe/icode/hipe_icode.erl
index 24b7ac4783..bc3403b0c5 100644
--- a/lib/hipe/icode/hipe_icode.erl
+++ b/lib/hipe/icode/hipe_icode.erl
@@ -515,10 +515,12 @@
 	 annotate_variable/2,  %% annotate_var_or_reg(VarOrReg, Type)
 	 unannotate_variable/1,%% unannotate_var_or_reg(VarOrReg)
 	 mk_reg/1,               %% mk_reg(Id)
+	 mk_reg_gcsafe/1,        %% mk_reg_gcsafe(Id)
 	 mk_fvar/1,              %% mk_fvar(Id)
 	 mk_new_var/0,           %% mk_new_var()
 	 mk_new_fvar/0,          %% mk_new_fvar()
 	 mk_new_reg/0,           %% mk_new_reg()
+	 mk_new_reg_gcsafe/0,    %% mk_new_reg_gcsafe()
 	 mk_phi/1,               %% mk_phi(Id)
 	 mk_phi/2                %% mk_phi(Id, ArgList)
 	]).
@@ -1260,14 +1262,22 @@ is_var(_) -> false.
 -spec mk_reg(non_neg_integer()) -> #icode_variable{kind::'reg'}.
 mk_reg(V) -> #icode_variable{name=V, kind=reg}.
 
--spec reg_name(#icode_variable{kind::'reg'}) -> non_neg_integer().
-reg_name(#icode_variable{name=Name, kind=reg}) -> Name.
+-spec mk_reg_gcsafe(non_neg_integer()) -> #icode_variable{kind::'reg_gcsafe'}.
+mk_reg_gcsafe(V) -> #icode_variable{name=V, kind=reg_gcsafe}.
 
--spec reg_is_gcsafe(#icode_variable{kind::'reg'}) -> 'false'.
-reg_is_gcsafe(#icode_variable{kind=reg}) -> false. % for now
+-spec reg_name(#icode_variable{kind::'reg'|'reg_gcsafe'})
+	      -> non_neg_integer().
+reg_name(#icode_variable{name=Name, kind=reg})        -> Name;
+reg_name(#icode_variable{name=Name, kind=reg_gcsafe}) -> Name.
+
+-spec reg_is_gcsafe(#icode_variable{kind::'reg'}) -> 'false';
+		   (#icode_variable{kind::'reg_gcsafe'}) -> 'true'.
+reg_is_gcsafe(#icode_variable{kind=reg})        -> false;
+reg_is_gcsafe(#icode_variable{kind=reg_gcsafe}) -> true.
 
 -spec is_reg(icode_argument()) -> boolean().
-is_reg(#icode_variable{kind=reg}) -> true;
+is_reg(#icode_variable{kind=reg})        -> true;
+is_reg(#icode_variable{kind=reg_gcsafe}) -> true;
 is_reg(_) -> false.
 
 -spec mk_fvar(non_neg_integer()) -> #icode_variable{kind::'fvar'}.
@@ -1676,6 +1686,16 @@ mk_new_reg() ->
   mk_reg(hipe_gensym:get_next_var(icode)).
 
 %%
+%% @doc Makes a new gcsafe register; that is, a register that is allowed to be
+%% live over calls and other operations that might cause GCs and thus move heap
+%% data around.
+%%
+
+-spec mk_new_reg_gcsafe() -> icode_reg().
+mk_new_reg_gcsafe() ->
+  mk_reg_gcsafe(hipe_gensym:get_next_var(icode)).
+
+%%
 %% @doc Makes a new label.
 %%
 
diff --git a/lib/hipe/icode/hipe_icode.hrl b/lib/hipe/icode/hipe_icode.hrl
index 380ddd8371..7ed80a9ed4 100644
--- a/lib/hipe/icode/hipe_icode.hrl
+++ b/lib/hipe/icode/hipe_icode.hrl
@@ -41,9 +41,9 @@
 
 -type variable_annotation() :: {atom(), any(), fun((any()) -> string())}.
 
--record(icode_variable, {name :: non_neg_integer(), 
-			 kind :: 'var' | 'reg' | 'fvar',
-			 annotation = [] :: [] | variable_annotation()}). 
+-record(icode_variable, {name :: non_neg_integer(),
+			 kind :: 'var' | 'reg' | 'reg_gcsafe' | 'fvar',
+			 annotation = [] :: [] | variable_annotation()}).
 
 %%---------------------------------------------------------------------
 %% Type declarations for Icode instructions
@@ -66,7 +66,7 @@
 -type icode_funcall()   :: mfa() | icode_primop().
 
 -type icode_var()	:: #icode_variable{kind::'var'}.
--type icode_reg()	:: #icode_variable{kind::'reg'}.
+-type icode_reg()	:: #icode_variable{kind::'reg'|'reg_gcsafe'}.
 -type icode_fvar()	:: #icode_variable{kind::'fvar'}.
 -type icode_argument()	:: #icode_const{} | #icode_variable{}.
 -type icode_term_arg()	:: icode_var() | #icode_const{}.
diff --git a/lib/hipe/icode/hipe_icode_inline_bifs.erl b/lib/hipe/icode/hipe_icode_inline_bifs.erl
index 7a6947f190..16a95991e7 100644
--- a/lib/hipe/icode/hipe_icode_inline_bifs.erl
+++ b/lib/hipe/icode/hipe_icode_inline_bifs.erl
@@ -24,8 +24,9 @@
 
 %% Currently inlined BIFs:
 %% and, or, xor, not, <, >, >=, =<, ==, /=, =/=, =:=
-%% is_atom, is_boolean, is_binary, is_float, is_function,
-%% is_integer, is_list, is_pid, is_port, is_reference, is_tuple
+%% is_atom, is_binary, is_bitstring, is_boolean, is_float,
+%% is_function, is_integer, is_list, is_map, is_number,
+%% is_pid, is_port, is_reference, is_tuple
 
 -module(hipe_icode_inline_bifs).
 
@@ -116,17 +117,20 @@ try_type_tests(I) -> I.
 
 is_type_test(Name) ->
   case Name of
-    is_integer -> {true, integer};
+    is_atom -> {true, atom};
+    is_binary -> {true, binary};
+    is_bitstring -> {true, bitstr};
+    is_boolean -> {true, boolean};
     is_float -> {true, float};
-    is_tuple -> {true, tuple};
-    is_binary -> {true, binary};	       
+    is_function -> {true, function};
+    is_integer -> {true, integer};
     is_list -> {true, list};
+    is_map -> {true, map};
+    is_number -> {true, number};
     is_pid -> {true, pid};
-    is_atom -> {true, atom};
-    is_boolean -> {true, boolean};
-    is_function -> {true, function};	       
-    is_reference -> {true, reference};
     is_port -> {true, port};
+    is_reference -> {true, reference};
+    is_tuple -> {true, tuple};
     _ -> false
   end.
  
diff --git a/lib/hipe/icode/hipe_icode_liveness.erl b/lib/hipe/icode/hipe_icode_liveness.erl
index 51e2855108..e61529a1bb 100644
--- a/lib/hipe/icode/hipe_icode_liveness.erl
+++ b/lib/hipe/icode/hipe_icode_liveness.erl
@@ -77,6 +77,7 @@ print_var(#icode_variable{name=V, kind=Kind, annotation=T}) ->
   case Kind of
     var -> io:format("v~p", [V]);
     reg -> io:format("r~p", [V]);
+    reg_gcsafe -> io:format("rs~p", [V]);
     fvar -> io:format("fv~p", [V])
   end,
   case T of
diff --git a/lib/hipe/icode/hipe_icode_pp.erl b/lib/hipe/icode/hipe_icode_pp.erl
index 5b017dca32..33d1e62884 100644
--- a/lib/hipe/icode/hipe_icode_pp.erl
+++ b/lib/hipe/icode/hipe_icode_pp.erl
@@ -230,7 +230,10 @@ pp_arg(Dev, Arg) ->
 	  case hipe_icode:is_reg(Arg) of
 	    true ->
 	      N = hipe_icode:reg_name(Arg),
-	      io:format(Dev, "r~p", [N]);
+	      case hipe_icode:reg_is_gcsafe(Arg) of
+		true  -> io:format(Dev, "rs~p", [N]);
+		false -> io:format(Dev, "r~p", [N])
+	      end;
 	    false ->
 	      N = hipe_icode:fvar_name(Arg),
 	      io:format(Dev, "fv~p", [N])
diff --git a/lib/hipe/icode/hipe_icode_primops.erl b/lib/hipe/icode/hipe_icode_primops.erl
index 50ece05259..a1f1128124 100644
--- a/lib/hipe/icode/hipe_icode_primops.erl
+++ b/lib/hipe/icode/hipe_icode_primops.erl
@@ -67,6 +67,8 @@ is_safe(fp_mul) -> false;
 is_safe(fp_sub) -> false;
 is_safe(mktuple) -> true;
 is_safe(next_msg) -> false;
+is_safe(recv_mark) -> false;
+is_safe(recv_set) -> false;
 is_safe(redtest) -> false;
 is_safe(select_msg) -> false;
 is_safe(self) -> true;
@@ -130,6 +132,7 @@ is_safe({hipe_bs_primop, {bs_match_string, _, _}}) -> false;
 is_safe({hipe_bs_primop, {bs_append, _, _, _, _}}) -> false;
 is_safe({hipe_bs_primop, {bs_private_append, _, _}}) -> false;
 is_safe({hipe_bs_primop, bs_init_writable}) -> true;
+is_safe(build_stacktrace) -> true;
 is_safe(#mkfun{}) -> true;
 is_safe(#unsafe_element{}) -> true;
 is_safe(#unsafe_update_element{}) -> true;
@@ -165,6 +168,8 @@ fails(fp_mul) -> false;
 fails(fp_sub) -> false;
 fails(mktuple) -> false;
 fails(next_msg) -> false;
+fails(recv_mark) -> false;
+fails(recv_set) -> false;
 fails(redtest) -> false;
 fails(select_msg) -> false;
 fails(self) -> false;
@@ -230,6 +235,8 @@ fails({hipe_bs_primop, bs_final}) -> false;
 fails({hipe_bs_primop, {bs_append, _, _, _, _}}) -> true;
 fails({hipe_bs_primop, {bs_private_append, _, _}}) -> true;
 fails({hipe_bs_primop, bs_init_writable}) -> true;
+fails(build_stacktrace) -> false;
+fails(raw_raise) -> true;
 fails(#mkfun{}) -> false;
 fails(#unsafe_element{}) -> false;
 fails(#unsafe_update_element{}) -> false;
@@ -709,6 +716,10 @@ type(Primop, Args) ->
       erl_types:t_any();
     next_msg ->
       erl_types:t_any();
+    recv_mark ->
+      erl_types:t_any();
+    recv_set ->
+      erl_types:t_any();
     select_msg ->
       erl_types:t_any();
     set_timeout ->
@@ -723,6 +734,10 @@ type(Primop, Args) ->
       erl_types:t_any();
     debug_native_called ->
       erl_types:t_any();
+    build_stacktrace ->
+      erl_types:t_list();
+    raw_raise ->
+      erl_types:t_atom();
     {M, F, A} ->
       erl_bif_types:type(M, F, A, Args)
   end.
@@ -883,6 +898,10 @@ type(Primop) ->
       erl_types:t_any();
     next_msg ->
       erl_types:t_any();
+    recv_mark ->
+      erl_types:t_any();
+    recv_set ->
+      erl_types:t_any();
     select_msg ->
       erl_types:t_any();
     set_timeout ->
@@ -891,6 +910,10 @@ type(Primop) ->
       erl_types:t_any();
 %%% -----------------------------------------------------
 %%% Other
+    build_stacktrace ->
+      erl_types:t_any();
+    raw_raise ->
+      erl_types:t_any();
     #closure_element{} ->
       erl_types:t_any();
     redtest ->
diff --git a/lib/hipe/icode/hipe_icode_range.erl b/lib/hipe/icode/hipe_icode_range.erl
index 287b1c80fe..34b18acccd 100644
--- a/lib/hipe/icode/hipe_icode_range.erl
+++ b/lib/hipe/icode/hipe_icode_range.erl
@@ -1160,6 +1160,8 @@ basic_type(#gc_test{}) -> not_analysed;
 %% Message handling
 basic_type(check_get_msg) -> not_analysed;
 basic_type(next_msg) -> not_analysed;
+basic_type(recv_mark) -> not_analysed;
+basic_type(recv_set) -> not_analysed;
 basic_type(select_msg) -> not_analysed;
 basic_type(suspend_msg) -> not_analysed;
 %% Functions
@@ -1184,7 +1186,9 @@ basic_type(unsafe_hd) -> not_analysed;
 basic_type(unsafe_tl) -> not_int;
 basic_type(#element{}) -> not_analysed;
 basic_type(#unsafe_element{}) -> not_analysed;
-basic_type(#unsafe_update_element{}) -> not_analysed.
+basic_type(#unsafe_update_element{}) -> not_analysed;
+basic_type(build_stacktrace) -> not_int;
+basic_type(raw_raise) -> not_int.
 
 -spec analyse_bs_get_integer(integer(), integer(), boolean()) -> range_tuple().
 
diff --git a/lib/hipe/llvm/hipe_llvm.erl b/lib/hipe/llvm/hipe_llvm.erl
index ccd40162cb..343ca94cb1 100644
--- a/lib/hipe/llvm/hipe_llvm.erl
+++ b/lib/hipe/llvm/hipe_llvm.erl
@@ -934,7 +934,7 @@ pp_ins(Dev, Ver, I) ->
       end,
       case call_is_tail(I) of
         true -> write(Dev, "tail ");
-        false -> ok
+        false -> write(Dev, "notail ")
       end,
       write(Dev, ["call ", call_cconv(I), " "]),
       pp_options(Dev, call_ret_attrs(I)),
diff --git a/lib/hipe/main/hipe.app.src b/lib/hipe/main/hipe.app.src
index 5b2280594f..7350e873aa 100644
--- a/lib/hipe/main/hipe.app.src
+++ b/lib/hipe/main/hipe.app.src
@@ -26,7 +26,6 @@
 	     cerl_closurean,
 	     cerl_hipeify,
 	     cerl_lib,
-	     cerl_messagean,
 	     cerl_pmatch,
 	     cerl_prettypr,
 	     cerl_to_icode,
@@ -179,6 +178,7 @@
 	     hipe_rtl_to_sparc,
 	     hipe_rtl_to_x86,
 	     hipe_rtl_varmap,
+	     hipe_rtl_verify_gcsafe,
 	     hipe_segment_trees,
 	     hipe_sdi,
 	     hipe_sparc,
@@ -236,4 +236,4 @@
   {applications, [kernel,stdlib]},
   {env, []},
   {runtime_dependencies, ["syntax_tools-1.6.14","stdlib-3.4","kernel-5.3",
-			  "erts-9.0","compiler-5.0"]}]}.
+			  "erts-9.3","compiler-5.0"]}]}.
diff --git a/lib/hipe/main/hipe.erl b/lib/hipe/main/hipe.erl
index f5f5bf5830..acb9b7b062 100644
--- a/lib/hipe/main/hipe.erl
+++ b/lib/hipe/main/hipe.erl
@@ -1414,6 +1414,7 @@ opt_keys() ->
      use_clusters,
      use_jumptable,
      verbose,
+     verify_gcsafe,
      %% verbose_spills,
      x87].
 
@@ -1510,7 +1511,8 @@ opt_negations() ->
    {no_use_callgraph, use_callgraph},
    {no_use_clusters, use_clusters},
    {no_use_inline_atom_search, use_inline_atom_search},
-   {no_use_indexing, use_indexing}].
+   {no_use_indexing, use_indexing},
+   {no_verify_gcsafe, verify_gcsafe}].
 
 %% Don't use negative forms in right-hand sides of aliases and expansions!
 %% We only expand negations once, before the other expansions are done.
diff --git a/lib/hipe/main/hipe_main.erl b/lib/hipe/main/hipe_main.erl
index dca6fddec3..6e48f0cffd 100644
--- a/lib/hipe/main/hipe_main.erl
+++ b/lib/hipe/main/hipe_main.erl
@@ -410,6 +410,11 @@ icode_to_rtl(MFA, Icode, Options, Servers) ->
         hipe_llvm_liveness:analyze(RtlCfg4)
     end,
   pp(RtlCfg5, MFA, rtl, pp_rtl, Options, Servers),
+  case proplists:get_bool(no_verify_gcsafe, Options) of
+    true -> ok;
+    false ->
+      ok = hipe_rtl_verify_gcsafe:check(RtlCfg5)
+  end,
   LinearRTL1 = hipe_rtl_cfg:linearize(RtlCfg5),
   LinearRTL2 = hipe_rtl_cleanup_const:cleanup(LinearRTL1),
   %% hipe_rtl:pp(standard_io, LinearRTL2),
diff --git a/lib/hipe/rtl/Makefile b/lib/hipe/rtl/Makefile
index 5abc9ec049..becdd0b7d8 100644
--- a/lib/hipe/rtl/Makefile
+++ b/lib/hipe/rtl/Makefile
@@ -50,7 +50,7 @@ HIPE_MODULES = hipe_rtl hipe_rtl_cfg \
 	  hipe_rtl_ssa hipe_rtl_ssa_const_prop \
 	  hipe_rtl_cleanup_const hipe_rtl_symbolic hipe_rtl_lcm \
 	  hipe_rtl_ssapre hipe_rtl_binary hipe_rtl_ssa_avail_expr \
-	  hipe_rtl_arch hipe_tagscheme
+	  hipe_rtl_arch hipe_tagscheme hipe_rtl_verify_gcsafe
 else
 HIPE_MODULES =
 endif
diff --git a/lib/hipe/rtl/hipe_rtl.erl b/lib/hipe/rtl/hipe_rtl.erl
index 04c9728d5c..33027f3259 100644
--- a/lib/hipe/rtl/hipe_rtl.erl
+++ b/lib/hipe/rtl/hipe_rtl.erl
@@ -1740,7 +1740,10 @@ pp_reg(Dev, Arg) ->
     true ->
       pp_hard_reg(Dev, reg_index(Arg));
     false ->
-      io:format(Dev, "r~w", [reg_index(Arg)])
+      case reg_is_gcsafe(Arg) of
+        true -> io:format(Dev, "rs~w", [reg_index(Arg)]);
+        false -> io:format(Dev, "r~w", [reg_index(Arg)])
+      end
   end.
 
 pp_var(Dev, Arg) ->
diff --git a/lib/hipe/rtl/hipe_rtl_binary_construct.erl b/lib/hipe/rtl/hipe_rtl_binary_construct.erl
index 52ea5db382..111dda3d82 100644
--- a/lib/hipe/rtl/hipe_rtl_binary_construct.erl
+++ b/lib/hipe/rtl/hipe_rtl_binary_construct.erl
@@ -168,9 +168,13 @@ gen_rtl(BsOP, Dst, Args, TrueLblName, FalseLblName, SystemLimitLblName, ConstTab
 
 	  bs_put_utf8 ->
 	    [_Src, _Base, _Offset] = Args,
-	    NewDsts = get_real(Dst),
-	    [hipe_rtl:mk_call(NewDsts, bs_put_utf8, Args,
-			      TrueLblName, FalseLblName, not_remote)];
+	    [NewOffs] = get_real(Dst),
+            RetLbl = hipe_rtl:mk_new_label(),
+            [hipe_rtl:mk_call([NewOffs], bs_put_utf8, Args,
+                              hipe_rtl:label_name(RetLbl), [], not_remote),
+             RetLbl,
+             hipe_rtl:mk_branch(NewOffs, ne, hipe_rtl:mk_imm(0),
+                                TrueLblName, FalseLblName, 0.99)];
 
 	  bs_utf16_size ->
 	    case Dst of
@@ -195,8 +199,13 @@ gen_rtl(BsOP, Dst, Args, TrueLblName, FalseLblName, SystemLimitLblName, ConstTab
 
 	  bs_validate_unicode ->
 	    [_Arg] = Args,
-	    [hipe_rtl:mk_call([], bs_validate_unicode, Args,
-			      TrueLblName, FalseLblName, not_remote)];
+            [IsUnicode] = create_regs(1),
+            RetLbl = hipe_rtl:mk_new_label(),
+            [hipe_rtl:mk_call([IsUnicode], is_unicode, Args,
+                              hipe_rtl:label_name(RetLbl), [], not_remote),
+             RetLbl,
+             hipe_rtl:mk_branch(IsUnicode, ne, hipe_rtl:mk_imm(0),
+                                TrueLblName, FalseLblName, 0.99)];
 
 	  bs_final ->
 	    Zero = hipe_rtl:mk_imm(0),
@@ -354,7 +363,8 @@ not_writable_code(Bin, SizeReg, Dst, Base, Offset, Unit,
 allocate_writable(Dst, Base, UsedBytes, TotBytes, TotSize) ->
   Zero = hipe_rtl:mk_imm(0),
   [NextLbl] = create_lbls(1),
-  [EndSubSize, EndSubBitSize, ProcBin] = create_regs(3),
+  [EndSubSize, EndSubBitSize] = create_regs(2),
+  [ProcBin] = create_unsafe_regs(1),
   [hipe_rtl:mk_call([Base], bs_allocate, [UsedBytes],
 		    hipe_rtl:label_name(NextLbl), [], not_remote),
    NextLbl,
@@ -581,12 +591,12 @@ const_init2(Size, Dst, Base, Offset, TrueLblName) ->
     false ->
       ByteSize = hipe_rtl:mk_new_reg(),
       [hipe_rtl:mk_gctest(?PROC_BIN_WORDSIZE+?SUB_BIN_WORDSIZE),
-       hipe_rtl:mk_move(Offset, hipe_rtl:mk_imm(0)),
        hipe_rtl:mk_move(ByteSize, hipe_rtl:mk_imm(Size)),
        hipe_rtl:mk_call([Base], bs_allocate, [ByteSize],
 			hipe_rtl:label_name(NextLbl), [], not_remote),
        NextLbl,
        hipe_tagscheme:create_refc_binary(Base, ByteSize, Dst),
+       hipe_rtl:mk_move(Offset, hipe_rtl:mk_imm(0)),
        hipe_rtl:mk_goto(TrueLblName)]
   end.
 
@@ -629,13 +639,12 @@ var_init2(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLblName
   Log2WordSize = hipe_rtl_arch:log2_word_size(),
   WordSize = hipe_rtl_arch:word_size(),
   [ContLbl, HeapLbl, REFCLbl, NextLbl] = create_lbls(4),
-  [USize, Tmp] = create_unsafe_regs(2),
+  [USize, Tmp] = create_regs(2),
   [get_word_integer(Size, USize, SystemLimitLblName, FalseLblName),
    hipe_rtl:mk_branch(USize, leu, hipe_rtl:mk_imm(?MAX_BINSIZE),
 		      hipe_rtl:label_name(ContLbl),
 		      SystemLimitLblName),
    ContLbl,
-   hipe_rtl:mk_move(Offset, hipe_rtl:mk_imm(0)),
    hipe_rtl:mk_branch(USize, leu, hipe_rtl:mk_imm(?MAX_HEAP_BIN_SIZE),
 		      hipe_rtl:label_name(HeapLbl),
 		      hipe_rtl:label_name(REFCLbl)),
@@ -645,6 +654,7 @@ var_init2(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLblName
    hipe_rtl:mk_alu(Tmp, Tmp, add, hipe_rtl:mk_imm(?SUB_BIN_WORDSIZE)),
    hipe_rtl:mk_gctest(Tmp),
    hipe_tagscheme:create_heap_binary(Base, USize, Dst),
+   hipe_rtl:mk_move(Offset, hipe_rtl:mk_imm(0)),
    hipe_rtl:mk_goto(TrueLblName),
    REFCLbl,
    hipe_rtl:mk_gctest(?PROC_BIN_WORDSIZE+?SUB_BIN_WORDSIZE),
@@ -652,6 +662,7 @@ var_init2(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLblName
 		    hipe_rtl:label_name(NextLbl), [], not_remote),
    NextLbl,
    hipe_tagscheme:create_refc_binary(Base, USize, Dst),
+   hipe_rtl:mk_move(Offset, hipe_rtl:mk_imm(0)),
    hipe_rtl:mk_goto(TrueLblName)].
 
 var_init_bits(Size, Dst, Base, Offset, TrueLblName, SystemLimitLblName, FalseLblName) ->
@@ -858,7 +869,7 @@ get_base_offset_size(Binary, SrcBase, SrcOffset, SrcSize, FLName) ->
    JoinLbl,
    hipe_tagscheme:test_heap_binary(Orig, HeapLblName, REFCLblName),
    HeapLbl,
-   hipe_rtl:mk_alu(SrcBase, Orig, add, hipe_rtl:mk_imm(?HEAP_BIN_DATA-2)),
+   hipe_tagscheme:get_field_addr_from_term({heap_bin, {data, 0}}, Orig, SrcBase),
    hipe_rtl:mk_goto(EndLblName),
    REFCLbl,
    hipe_tagscheme:get_field_from_term({proc_bin,bytes}, Orig, SrcBase),
@@ -1205,6 +1216,12 @@ is_divisible(Dividend, Divisor, SuccLbl, FailLbl) ->
       [hipe_rtl:mk_branch(Dividend, 'and', Mask, eq, SuccLbl, FailLbl, 0.99)];
     false ->
       %% We need division, fall back to a primop
-      [hipe_rtl:mk_call([], is_divisible, [Dividend, hipe_rtl:mk_imm(Divisor)],
-			SuccLbl, FailLbl, not_remote)]
+      [Tmp] = create_regs(1),
+      RetLbl = hipe_rtl:mk_new_label(),
+      [hipe_rtl:mk_call([Tmp], is_divisible,
+                        [Dividend, hipe_rtl:mk_imm(Divisor)],
+                        hipe_rtl:label_name(RetLbl), [], not_remote),
+       RetLbl,
+       hipe_rtl:mk_branch(Tmp, ne, hipe_rtl:mk_imm(0),
+                          SuccLbl, FailLbl, 0.99)]
   end.
diff --git a/lib/hipe/rtl/hipe_rtl_binary_match.erl b/lib/hipe/rtl/hipe_rtl_binary_match.erl
index 362a52f8fe..4575213838 100644
--- a/lib/hipe/rtl/hipe_rtl_binary_match.erl
+++ b/lib/hipe/rtl/hipe_rtl_binary_match.erl
@@ -730,7 +730,7 @@ get_base(Orig,Base) ->
   [hipe_tagscheme:test_heap_binary(Orig, hipe_rtl:label_name(HeapLbl),
 				   hipe_rtl:label_name(REFCLbl)),
    HeapLbl,
-   hipe_rtl:mk_alu(Base, Orig, 'add', hipe_rtl:mk_imm(?HEAP_BIN_DATA-2)),
+   hipe_tagscheme:get_field_addr_from_term({heap_bin, {data, 0}}, Orig, Base),
    hipe_rtl:mk_goto(hipe_rtl:label_name(EndLbl)),
    REFCLbl,
    get_field_from_term({proc_bin, flags}, Orig, Flags),
@@ -740,7 +740,7 @@ get_base(Orig,Base) ->
    WritableLbl,
    hipe_rtl:mk_call([], emasculate_binary, [Orig], [], [], 'not_remote'),
    NotWritableLbl,
-   hipe_rtl:mk_load(Base, Orig, hipe_rtl:mk_imm(?PROC_BIN_BYTES-2)),
+   get_field_from_term({proc_bin, bytes}, Orig, Base),
    EndLbl].
 
 extract_matchstate_var(binsize, Ms) ->
@@ -842,12 +842,12 @@ make_dyn_prep(SizeReg, CCode) ->
 %%------------------------------------------------------------------------
 
 get_unaligned_int(Dst1, Size, Base, Offset, Shiftr, Type, TrueLblName) ->
-  [Reg] = create_regs(1),
+  [Reg] = create_gcsafe_regs(1),
   [get_maybe_unaligned_int_to_reg(Reg, Size, Base, Offset, Shiftr, Type),
    do_bignum_code(Size, Type, Reg, Dst1, TrueLblName)].
 
 get_maybe_unaligned_int_to_reg(Reg, Size, Base, Offset, Shiftr, Type) ->
-  [LowBits] = create_regs(1),
+  [LowBits] = create_gcsafe_regs(1),
   [AlignedLbl, UnAlignedLbl, EndLbl] = create_lbls(3),
   [hipe_rtl:mk_alub(LowBits, Offset, 'and', hipe_rtl:mk_imm(?LOW_BITS),
 		    eq, hipe_rtl:label_name(AlignedLbl), 
@@ -1001,7 +1001,7 @@ do_bignum_code(Size, {Signedness,_}, Src, Dst1, TrueLblName)
     end.
 
 signed_bignum(Dst1, Src, TrueLblName) ->
-  Tmp1 = hipe_rtl:mk_new_reg(),
+  Tmp1 = hipe_rtl:mk_new_reg_gcsafe(),
   BignumLabel = hipe_rtl:mk_new_label(),
   [hipe_tagscheme:realtag_fixnum(Dst1, Src),
    hipe_tagscheme:realuntag_fixnum(Tmp1, Dst1),
diff --git a/lib/hipe/rtl/hipe_rtl_cleanup_const.erl b/lib/hipe/rtl/hipe_rtl_cleanup_const.erl
index bfa6b9682e..00cc2bcb37 100644
--- a/lib/hipe/rtl/hipe_rtl_cleanup_const.erl
+++ b/lib/hipe/rtl/hipe_rtl_cleanup_const.erl
@@ -69,9 +69,9 @@ cleanup_instr([Const|Left], I, Acc) ->
   case I of
     X when is_record(X, fp_unop) orelse is_record(X, fp) ->
       Fdst = hipe_rtl:mk_new_fpreg(),
-      Fconv = hipe_tagscheme:unsafe_untag_float(Fdst, Dst),		  
+      Fconv = lists:flatten(hipe_tagscheme:unsafe_untag_float(Fdst, Dst)),
       NewI = hipe_rtl:subst_uses([{Const, Fdst}], I),
-      cleanup_instr(Left, NewI, Fconv ++ [Load|Acc]);
+      cleanup_instr(Left, NewI, lists:reverse(Fconv, [Load|Acc]));
     _ ->
       NewI = hipe_rtl:subst_uses([{Const, Dst}], I),
       cleanup_instr(Left, NewI, [Load|Acc])
diff --git a/lib/hipe/rtl/hipe_rtl_lcm.erl b/lib/hipe/rtl/hipe_rtl_lcm.erl
index 9dcdd05fb1..af39c9a0a4 100644
--- a/lib/hipe/rtl/hipe_rtl_lcm.erl
+++ b/lib/hipe/rtl/hipe_rtl_lcm.erl
@@ -182,42 +182,41 @@ delete_exprs(Code, _, _, []) ->
   Code;
 delete_exprs(Code, ExprMap, IdMap, [ExprId|Exprs]) ->
   Expr = expr_id_map_get_expr(IdMap, ExprId),
-  %% Perform a foldl that goes through the code and deletes all
-  %% occurences of the expression.
-  NewCode =
-    lists:reverse
-      (lists:foldl(fun(CodeExpr, Acc) ->
-                     case is_expr(CodeExpr) of
-                       true ->
-                         case expr_clear_dst(CodeExpr) =:= Expr of
-                           true ->
-                             pp_debug("  Deleting:         ", []),
-                             pp_debug_instr(CodeExpr),
-                             %% Lookup expression entry.
-                             Defines = 
-                               case expr_map_lookup(ExprMap, Expr) of
-                                 {value, {_, _, Defs}} -> 
-				   Defs;
-                                 none -> 
-                                   exit({?MODULE, expr_map_lookup,
-                                         "expression missing"})
-                               end,
-                             MoveCode = 
-                               mk_expr_move_instr(hipe_rtl:defines(CodeExpr),
-						  Defines),
-                             pp_debug("    Replacing with: ", []),
-                             pp_debug_instr(MoveCode),
-                             [MoveCode|Acc];
-                           false ->
-                             [CodeExpr|Acc]
-                         end;
-		       false ->
-                             [CodeExpr|Acc]
-                     end
-                   end, 
-		   [], Code)),
+  %% Lookup expression entry.
+  {value, {_, _, Defines}} = expr_map_lookup(ExprMap, Expr),
+  %% Go through the code and deletes all occurences of the expression.
+  NewCode = delete_expr(Code, Expr, Defines, []),
   delete_exprs(NewCode, ExprMap, IdMap, Exprs).
 
+delete_expr([], _Expr, _Defines, Acc) -> lists:reverse(Acc);
+delete_expr([CodeExpr|Code], Expr, Defines, Acc) ->
+  case exp_kill_expr(CodeExpr, [Expr]) of
+    [] -> % Expr was killed; deleting stops here
+      pp_debug("  Stopping before:  ", []),
+      pp_debug_instr(CodeExpr),
+      lists:reverse(Acc, [CodeExpr|Code]);
+    [Expr] ->
+      NewCodeExpr =
+        case is_expr(CodeExpr) of
+          true ->
+            case expr_clear_dst(CodeExpr) =:= Expr of
+              true ->
+                pp_debug("  Deleting:         ", []),
+                pp_debug_instr(CodeExpr),
+                MoveCode = mk_expr_move_instr(hipe_rtl:defines(CodeExpr),
+                                              Defines),
+                pp_debug("    Replacing with: ", []),
+                pp_debug_instr(MoveCode),
+                MoveCode;
+              false ->
+                CodeExpr
+            end;
+          false ->
+            CodeExpr
+        end,
+      delete_expr(Code, Expr, Defines, [NewCodeExpr|Acc])
+  end.
+
 %%=============================================================================
 %% Goes through the given list of expressions and inserts them at 
 %% appropriate places in the code.
@@ -226,13 +225,12 @@ insert_exprs(CFG, _, _, _, _, BetweenMap, []) ->
 insert_exprs(CFG, Pred, Succ, ExprMap, IdMap, BetweenMap, [ExprId|Exprs]) ->
   Expr = expr_id_map_get_expr(IdMap, ExprId),
   Instr = expr_map_get_instr(ExprMap, Expr),
-  case hipe_rtl_cfg:succ(CFG, Pred) of
-    [_] ->
+  case try_insert_expr_last(CFG, Pred, Instr) of
+    {ok, NewCFG} ->
       pp_debug("  Inserted last: ", []),
       pp_debug_instr(Instr),
-      NewCFG = insert_expr_last(CFG, Pred, Instr),
       insert_exprs(NewCFG, Pred, Succ, ExprMap, IdMap, BetweenMap, Exprs);
-    _ ->
+    not_safe ->
       case hipe_rtl_cfg:pred(CFG, Succ) of
         [_] ->
 	  pp_debug("  Inserted first: ", []),
@@ -252,25 +250,31 @@ insert_exprs(CFG, Pred, Succ, ExprMap, IdMap, BetweenMap, [ExprId|Exprs]) ->
 %% Recursively goes through the code in a block and returns a new block
 %% with the new code inserted second to last (assuming the last expression
 %% is a branch operation).
-insert_expr_last(CFG0, Label, Instr) ->
-  Code0 = hipe_bb:code(hipe_rtl_cfg:bb(CFG0, Label)),
-  %% FIXME: Use hipe_bb:butlast() instead?
-  Code1 = insert_expr_last_work(Label, Instr, Code0),
-  hipe_rtl_cfg:bb_add(CFG0, Label, hipe_bb:mk_bb(Code1)).
+try_insert_expr_last(CFG0, Label, Instr) ->
+  case hipe_rtl_cfg:succ(CFG0, Label) of
+    [_] ->
+      Code0 = hipe_bb:code(hipe_rtl_cfg:bb(CFG0, Label)),
+      case insert_expr_last_work(Instr, Code0) of
+        not_safe -> not_safe;
+        Code1 ->
+          {ok, hipe_rtl_cfg:bb_add(CFG0, Label, hipe_bb:mk_bb(Code1))}
+      end;
+    _ -> not_safe
+  end.
 
 %%=============================================================================
 %% Recursively goes through the code in a block and returns a new block
 %% with the new code inserted second to last (assuming the last expression
 %% is a branch operation).
-insert_expr_last_work(_, Instr, []) ->
-  %% This case should not happen since this means that block was completely 
-  %% empty when the function was called. For compatibility we insert it last.
-  [Instr];
-insert_expr_last_work(_, Instr, [Code1]) ->
+insert_expr_last_work(_Instr, [#call{}]) ->
+  %% Call instructions clobber all expressions; we musn't insert the expression
+  %% before it
+  not_safe;
+insert_expr_last_work(Instr, [Code1]) ->
   %% We insert the code next to last.
   [Instr, Code1];
-insert_expr_last_work(Label, Instr, [Code|Codes]) ->
-  [Code|insert_expr_last_work(Label, Instr, Codes)].
+insert_expr_last_work(Instr, [Code|Codes]) ->
+  [Code|insert_expr_last_work(Instr, Codes)].
 
 %%=============================================================================
 %% Inserts expression first in the block for the given label.
@@ -305,7 +309,8 @@ insert_expr_between(CFG0, BetweenMap, Pred, Succ, Instr) ->
     {value, Label} ->
       pp_debug("    Using existing new bb for edge (~w,~w) with label ~w~n", 
 	       [Pred, Succ, Label]),
-      {insert_expr_last(CFG0, Label, Instr), BetweenMap}
+      {ok, NewCfg} = try_insert_expr_last(CFG0, Label, Instr),
+      {NewCfg, BetweenMap}
   end.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
diff --git a/lib/hipe/rtl/hipe_rtl_primops.erl b/lib/hipe/rtl/hipe_rtl_primops.erl
index 850a75f71b..ce5433379e 100644
--- a/lib/hipe/rtl/hipe_rtl_primops.erl
+++ b/lib/hipe/rtl/hipe_rtl_primops.erl
@@ -291,6 +291,10 @@ gen_primop({Op,Dst,Args,Cont,Fail}, IsGuard, ConstTab) ->
 	    gen_select_msg(Dst, Cont);
 	  clear_timeout ->
 	    gen_clear_timeout(Dst, GotoCont);
+          recv_mark ->
+            gen_recv_mark(Dst, GotoCont);
+	  recv_set ->
+            gen_recv_set(Dst, Cont);
 	  set_timeout ->
 	    %% BIF call: am_set_timeout -> nbif_set_timeout -> hipe_set_timeout
 	    [hipe_rtl:mk_call(Dst, set_timeout, Args, Cont, Fail, not_remote)];
@@ -390,6 +394,10 @@ gen_primop({Op,Dst,Args,Cont,Fail}, IsGuard, ConstTab) ->
 	    end;
 	  debug_native_called -> 
 	    [hipe_rtl:mk_call(Dst, Op, Args, Cont, Fail, not_remote)];
+          build_stacktrace ->
+	    [hipe_rtl:mk_call(Dst, Op, Args, Cont, Fail, not_remote)];
+          raw_raise ->
+	    [hipe_rtl:mk_call(Dst, Op, Args, Cont, Fail, not_remote)];
 
 	  %% Only names listed above are accepted! MFA:s are not primops!
 	  _ ->
@@ -1064,6 +1072,27 @@ gen_tuple_header(Ptr, Arity) ->
 %%%
 %%% Receives
 
+%%% recv_mark is:
+%%%	p->msg.saved_last = p->msg.last;
+gen_recv_mark([], GotoCont) ->
+  TmpLast = hipe_rtl:mk_new_reg(),
+  [load_p_field(TmpLast, ?P_MSG_LAST),
+   store_p_field(TmpLast, ?P_MSG_SAVED_LAST),
+   GotoCont].
+
+%%% recv_set is:
+%%%	if (p->msg.saved_last)
+%%%	    p->msg.save = p->msg.saved_last;
+gen_recv_set([], Cont) ->
+  TmpSave = hipe_rtl:mk_new_reg(),
+  TrueLbl = hipe_rtl:mk_new_label(),
+  [load_p_field(TmpSave, ?P_MSG_SAVED_LAST),
+   hipe_rtl:mk_branch(TmpSave, ne, hipe_rtl:mk_imm(0),
+                      hipe_rtl:label_name(TrueLbl), Cont),
+   TrueLbl,
+   store_p_field(TmpSave, ?P_MSG_SAVE),
+   hipe_rtl:mk_goto(Cont)].
+
 gen_check_get_msg(Dsts, GotoCont, Fail) ->
   gen_check_get_msg_outofline(Dsts, GotoCont, Fail).
 
diff --git a/lib/hipe/rtl/hipe_rtl_varmap.erl b/lib/hipe/rtl/hipe_rtl_varmap.erl
index 375a8f85c0..f34c66ab85 100644
--- a/lib/hipe/rtl/hipe_rtl_varmap.erl
+++ b/lib/hipe/rtl/hipe_rtl_varmap.erl
@@ -105,7 +105,7 @@ icode_var2rtl_var(Var, Map) ->
 	{reg, IsGcSafe} ->
 	  NewVar =
 	    case IsGcSafe of
-	      %% true -> hipe_rtl:mk_new_reg_gcsafe();
+              true -> hipe_rtl:mk_new_reg_gcsafe();
 	      false -> hipe_rtl:mk_new_reg()
 	    end,
 	  {NewVar, insert(Var, NewVar, Map)}
diff --git a/lib/hipe/rtl/hipe_rtl_verify_gcsafe.erl b/lib/hipe/rtl/hipe_rtl_verify_gcsafe.erl
new file mode 100644
index 0000000000..01d7e89ccd
--- /dev/null
+++ b/lib/hipe/rtl/hipe_rtl_verify_gcsafe.erl
@@ -0,0 +1,89 @@
+%% -*- mode: erlang; erlang-indent-level: 2 -*-
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+-module(hipe_rtl_verify_gcsafe).
+
+-export([check/1]).
+
+-include("../flow/cfg.hrl").              %% needed for the specs
+-include("hipe_rtl.hrl").
+
+check(CFG) ->
+  Liveness = hipe_rtl_liveness:analyze(CFG),
+  put({?MODULE, 'fun'}, CFG#cfg.info#cfg_info.'fun'),
+  lists:foreach(
+    fun(Lb) ->
+        put({?MODULE, label}, Lb),
+        Liveout = hipe_rtl_liveness:liveout(Liveness, Lb),
+        BB = hipe_rtl_cfg:bb(CFG, Lb),
+        check_instrs(lists:reverse(hipe_bb:code(BB)), Liveout)
+    end, hipe_rtl_cfg:labels(CFG)),
+  erase({?MODULE, 'fun'}),
+  erase({?MODULE, label}),
+  erase({?MODULE, instr}),
+  ok.
+
+check_instrs([], _Livein) -> ok;
+check_instrs([I|Is], LiveOut) ->
+  Def = ordsets:from_list(hipe_rtl:defines(I)),
+  Use = ordsets:from_list(hipe_rtl:uses(I)),
+  LiveOver = ordsets:subtract(LiveOut, Def),
+  LiveIn = ordsets:union(LiveOver, Use),
+  case (hipe_rtl:is_call(I)
+        andalso not safe_primop(hipe_rtl:call_fun(I)))
+    orelse is_record(I, gctest)
+  of
+    false -> ok;
+    true ->
+      put({?MODULE, instr}, I),
+      lists:foreach(fun verify_live/1, LiveOver)
+  end,
+  check_instrs(Is, LiveIn).
+
+verify_live(T) ->
+  case hipe_rtl:is_reg(T) of
+    false -> ok;
+    true ->
+      case hipe_rtl:reg_is_gcsafe(T) of
+        true -> ok;
+        false ->
+          error({gcunsafe_live_over_call,
+                 get({?MODULE, 'fun'}),
+                 {label, get({?MODULE, label})},
+                 get({?MODULE, instr}),
+                 T})
+      end
+  end.
+
+%% Primops that can't gc
+%% Note: This information is essentially duplicated from hipe_bif_list.m4
+safe_primop(is_divisible) -> true;
+safe_primop(is_unicode) -> true;
+safe_primop(cmp_2) -> true;
+safe_primop(eq_2) -> true;
+safe_primop(bs_allocate) -> true;
+safe_primop(bs_reallocate) -> true;
+safe_primop(bs_utf8_size) -> true;
+safe_primop(bs_get_utf8) -> true;
+safe_primop(bs_put_utf8) -> true;
+safe_primop(bs_utf16_size) -> true;
+safe_primop(bs_get_utf16) -> true;
+safe_primop(bs_validate_unicode_retract) -> true;
+safe_primop(bs_put_small_float) -> true;
+safe_primop(bs_put_bits) -> true;
+safe_primop(emasculate_binary) -> true;
+safe_primop(atomic_inc) -> true;
+%% Not noproc but manually verified
+safe_primop(bs_put_big_integer) -> true;
+safe_primop(_) -> false.
diff --git a/lib/hipe/rtl/hipe_tagscheme.erl b/lib/hipe/rtl/hipe_tagscheme.erl
index 68cbe75e85..737f0ec5e3 100644
--- a/lib/hipe/rtl/hipe_tagscheme.erl
+++ b/lib/hipe/rtl/hipe_tagscheme.erl
@@ -53,7 +53,8 @@
 -export([test_subbinary/3, test_heap_binary/3]).
 -export([create_heap_binary/3, create_refc_binary/3, create_refc_binary/4]).
 -export([create_matchstate/6, convert_matchstate/1, compare_matchstate/4]).
--export([get_field_from_term/3, get_field_from_pointer/3,
+-export([get_field_addr_from_term/3,
+	 get_field_from_term/3, get_field_from_pointer/3,
 	 set_field_from_term/3, set_field_from_pointer/3,
 	 extract_matchbuffer/2, extract_binary_bytes/2]).
 
@@ -76,6 +77,10 @@
 -define(TAG_PRIMARY_BOXED,  16#2).
 -define(TAG_PRIMARY_IMMED1, 16#3).
 
+%% Only when ?ERTS_USE_LITERAL_TAG =:= 1
+-define(TAG_PTR_MASK__,   16#7).
+-define(TAG_LITERAL_PTR,  16#4).
+
 -define(TAG_IMMED1_SIZE,  4).
 -define(TAG_IMMED1_MASK,  16#F).
 -define(TAG_IMMED1_PID,   ((16#0 bsl ?TAG_PRIMARY_SIZE) bor ?TAG_PRIMARY_IMMED1)).
@@ -157,6 +162,38 @@ tag_cons(Res, X) ->
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+ptr_val(Res, X) ->
+  hipe_rtl:mk_alu(Res, X, 'and', hipe_rtl:mk_imm(bnot ?TAG_PTR_MASK__)).
+
+%% Returns {Base, Offset, Untag}. To be used like, for example:
+%% {Base, Offset, Untag} = untag_ptr(X, ?TAG_PRIMARY_BOXED),
+%% ...
+%% [Untag, hipe_rtl:mk_load(Dst, Base, hipe_rtl:mk_imm(Offset))].
+%%
+%% NB: Base might either be X or a new temp. It must thus not be modified.
+untag_ptr(X, Tag) ->
+  case ?ERTS_USE_LITERAL_TAG of
+    0 ->
+      {X, -Tag, []};
+    1 ->
+      Base = hipe_rtl:mk_new_reg(),
+      Untag = ptr_val(Base, X),
+      {Base, 0, Untag}
+  end.
+
+untag_ptr_nooffset(Dst, X, Tag) ->
+  %% We could just use ptr_val in all cases, but subtraction can use LEA on x86
+  %% and can be inlined into effective address computations on several
+  %% architectures.
+  case ?ERTS_USE_LITERAL_TAG of
+    0 ->
+      hipe_rtl:mk_alu(Dst, X, 'sub', hipe_rtl:mk_imm(Tag));
+    1 ->
+      ptr_val(Dst, X)
+  end.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
 %%% Operations to test if an object has a known type T.
 
 test_nil(X, TrueLab, FalseLab, Pred) ->
@@ -171,7 +208,8 @@ test_is_boxed(X, TrueLab, FalseLab, Pred) ->
   hipe_rtl:mk_branch(X, 'and', Mask, 'eq', TrueLab, FalseLab, Pred).
 
 get_header(Res, X) ->
-  hipe_rtl:mk_load(Res, X, hipe_rtl:mk_imm(-(?TAG_PRIMARY_BOXED))).
+  {Base, Offset, Untag} = untag_ptr(X, ?TAG_PRIMARY_BOXED),
+  [Untag, hipe_rtl:mk_load(Res, Base, hipe_rtl:mk_imm(Offset))].
 
 mask_and_compare(X, Mask, Value, TrueLab, FalseLab, Pred) ->
   Tmp = hipe_rtl:mk_new_reg_gcsafe(),
@@ -617,21 +655,25 @@ test_either_immed(Arg1, Arg2, TrueLab, FalseLab) ->
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 unsafe_car(Dst, Arg) ->
-  hipe_rtl:mk_load(Dst, Arg, hipe_rtl:mk_imm(-(?TAG_PRIMARY_LIST))).
+  {Base, Offset, Untag} = untag_ptr(Arg, ?TAG_PRIMARY_LIST),
+  [Untag, hipe_rtl:mk_load(Dst, Base, hipe_rtl:mk_imm(Offset))].
 
 unsafe_cdr(Dst, Arg) ->
+  {Base, Offset, Untag} = untag_ptr(Arg, ?TAG_PRIMARY_LIST),
   WordSize = hipe_rtl_arch:word_size(),
-  hipe_rtl:mk_load(Dst, Arg, hipe_rtl:mk_imm(-(?TAG_PRIMARY_LIST)+WordSize)).
+  [Untag, hipe_rtl:mk_load(Dst, Base, hipe_rtl:mk_imm(Offset+WordSize))].
 
 unsafe_constant_element(Dst, Index, Tuple) ->	% Index is an immediate
   WordSize = hipe_rtl_arch:word_size(),
-  Offset = -(?TAG_PRIMARY_BOXED) + WordSize * hipe_rtl:imm_value(Index),
-  hipe_rtl:mk_load(Dst, Tuple, hipe_rtl:mk_imm(Offset)).
+  {Base, Offset0, Untag} = untag_ptr(Tuple, ?TAG_PRIMARY_BOXED),
+  Offset = Offset0 + WordSize * hipe_rtl:imm_value(Index),
+  [Untag, hipe_rtl:mk_load(Dst, Base, hipe_rtl:mk_imm(Offset))].
 
 unsafe_update_element(Tuple, Index, Value) ->   % Index is an immediate
   WordSize = hipe_rtl_arch:word_size(),
-  Offset = -(?TAG_PRIMARY_BOXED) + WordSize * hipe_rtl:imm_value(Index),
-  hipe_rtl:mk_store(Tuple, hipe_rtl:mk_imm(Offset), Value).
+  {Base, Offset0, Untag} = untag_ptr(Tuple, ?TAG_PRIMARY_BOXED),
+  Offset = Offset0 + WordSize * hipe_rtl:imm_value(Index),
+  [Untag, hipe_rtl:mk_store(Base, hipe_rtl:mk_imm(Offset), Value)].
 
 %%% wrong semantics
 %% unsafe_variable_element(Dst, Index, Tuple) -> % Index is an unknown fixnum
@@ -644,10 +686,12 @@ unsafe_update_element(Tuple, Index, Value) ->   % Index is an immediate
 %%     Tmp1 = hipe_rtl:mk_new_reg_gcsafe(),
 %%     Tmp2 = hipe_rtl:mk_new_reg_gcsafe(),
 %%     Shift = ?TAG_IMMED1_SIZE - 2,
-%%     OffAdj = (?TAG_IMMED1_SMALL bsr Shift) + ?TAG_PRIMARY_BOXED,
+%%     {Base, Off0, Untag} = untag_ptr(Tuple, ?TAG_PRIMARY_BOXED),
+%%     OffAdj = (?TAG_IMMED1_SMALL bsr Shift) - Off0,
 %%     [hipe_rtl:mk_alu(Tmp1, Index, 'srl', hipe_rtl:mk_imm(Shift)),
 %%      hipe_rtl:mk_alu(Tmp2, Tmp1, 'sub', hipe_rtl:mk_imm(OffAdj)),
-%%      hipe_rtl:mk_load(Dst, Tuple, Tmp2)].
+%%      Untag,
+%%      hipe_rtl:mk_load(Base, Tuple, Tmp2)].
 
 element(Dst, Index, Tuple, FailLabName, {tuple, A}, IndexInfo) ->
   FixnumOkLab = hipe_rtl:mk_new_label(),
@@ -660,7 +704,7 @@ element(Dst, Index, Tuple, FailLabName, {tuple, A}, IndexInfo) ->
       Offset = hipe_rtl:mk_new_reg_gcsafe(),
       Ptr = hipe_rtl:mk_new_reg(), % offset from Tuple
       [untag_fixnum(UIndex, Index),
-       hipe_rtl:mk_alu(Ptr, Tuple, 'sub', hipe_rtl:mk_imm(?TAG_PRIMARY_BOXED)),
+       untag_ptr_nooffset(Ptr, Tuple, ?TAG_PRIMARY_BOXED),
        hipe_rtl:mk_alu(Offset, UIndex, 'sll', 
 		       hipe_rtl:mk_imm(hipe_rtl_arch:log2_word_size())),
        hipe_rtl:mk_load(Dst, Ptr, Offset)];
@@ -769,7 +813,7 @@ gen_element_tail(Dst, Tuple, Arity, UIndex, FailLabName, IndexOkLab) ->
    hipe_rtl:mk_branch(ZeroIndex, 'geu', Arity, FailLabName,
 		      hipe_rtl:label_name(IndexOkLab), 0.01),
    IndexOkLab,
-   hipe_rtl:mk_alu(Ptr, Tuple, 'sub', hipe_rtl:mk_imm(?TAG_PRIMARY_BOXED)),
+   untag_ptr_nooffset(Ptr, Tuple, ?TAG_PRIMARY_BOXED),
    hipe_rtl:mk_alu(Offset, UIndex, 'sll',
                    hipe_rtl:mk_imm(hipe_rtl_arch:log2_word_size())),
    hipe_rtl:mk_load(Dst, Ptr, Offset)].
@@ -777,11 +821,13 @@ gen_element_tail(Dst, Tuple, Arity, UIndex, FailLabName, IndexOkLab) ->
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 unsafe_closure_element(Dst, Index, Closure) ->	% Index is an immediate
-  Offset = -(?TAG_PRIMARY_BOXED)    %% Untag
+  %% XXX: Can there even be closure literals?
+  {Base, Offset0, Untag} = untag_ptr(Closure, ?TAG_PRIMARY_BOXED),
+  Offset = Offset0                  %% Untag
     + ?EFT_ENV                      %% Field offset
                                     %% Index from 1 to N hence -1)
     + (hipe_rtl_arch:word_size() * (hipe_rtl:imm_value(Index)-1)),
-  hipe_rtl:mk_load(Dst, Closure, hipe_rtl:mk_imm(Offset)).
+  [Untag, hipe_rtl:mk_load(Dst, Base, hipe_rtl:mk_imm(Offset))].
 
 mk_fun_header() ->
   hipe_rtl:mk_imm(?HEADER_FUN).
@@ -790,7 +836,7 @@ tag_fun(Res, X) ->
   tag_boxed(Res, X).
 
 %% untag_fun(Res, X) ->
-%%   hipe_rtl:mk_alu(Res, X, 'sub', hipe_rtl:mk_imm(?TAG_PRIMARY_BOXED)).
+%%   untag_ptr_nooffset(Res, X, ?TAG_PRIMARY_BOXED).
 
 if_fun_get_arity_and_address(ArityReg, AddressReg, FunP, BadFunLab, Pred) ->
   %% EmuAddressPtrReg = hipe_rtl:mk_new_reg(),
@@ -801,15 +847,15 @@ if_fun_get_arity_and_address(ArityReg, AddressReg, FunP, BadFunLab, Pred) ->
   TrueLab0 = hipe_rtl:mk_new_label(),
   %% TrueLab1 = hipe_rtl:mk_new_label(),
   IsFunCode = test_closure(FunP, hipe_rtl:label_name(TrueLab0), BadFunLab, Pred),
+  {Base, Offset, Untag} = untag_ptr(FunP, ?TAG_PRIMARY_BOXED),
   GetArityCode =
     [TrueLab0,
      %% Funp->arity contains the arity
-     hipe_rtl:mk_load(ArityReg, FunP,
-		      hipe_rtl:mk_imm(-(?TAG_PRIMARY_BOXED)+
-				      ?EFT_ARITY)),
-     hipe_rtl:mk_load(FEPtrReg, FunP,
-		      hipe_rtl:mk_imm(-(?TAG_PRIMARY_BOXED)+
-				      ?EFT_FE)),
+     Untag,
+     hipe_rtl:mk_load(ArityReg, Base,
+		      hipe_rtl:mk_imm(Offset+?EFT_ARITY)),
+     hipe_rtl:mk_load(FEPtrReg, Base,
+		      hipe_rtl:mk_imm(Offset+?EFT_FE)),
      hipe_rtl:mk_load(AddressReg, FEPtrReg,
 		      hipe_rtl:mk_imm(?EFE_NATIVE_ADDRESS))],
   IsFunCode ++ GetArityCode.
@@ -927,20 +973,24 @@ test_subbinary(Binary, TrueLblName, FalseLblName) ->
 
 unsafe_load_float(DstLo, DstHi, Src) ->
   WordSize = hipe_rtl_arch:word_size(),
-  Offset1 = -(?TAG_PRIMARY_BOXED) + WordSize,
+  {Base, Offset0, Untag} = untag_ptr(Src, ?TAG_PRIMARY_BOXED),
+  Offset1 = Offset0 + WordSize,
   Offset2 = Offset1 + 4, %% This should really be 4 and not WordSize
   case hipe_rtl_arch:endianess() of
     little ->
-      [hipe_rtl:mk_load(DstLo, Src, hipe_rtl:mk_imm(Offset1), int32, unsigned),
-       hipe_rtl:mk_load(DstHi, Src, hipe_rtl:mk_imm(Offset2), int32, unsigned)];
+      [Untag,
+       hipe_rtl:mk_load(DstLo, Base, hipe_rtl:mk_imm(Offset1), int32, unsigned),
+       hipe_rtl:mk_load(DstHi, Base, hipe_rtl:mk_imm(Offset2), int32, unsigned)];
     big ->
-      [hipe_rtl:mk_load(DstHi, Src, hipe_rtl:mk_imm(Offset1), int32, unsigned),
-       hipe_rtl:mk_load(DstLo, Src, hipe_rtl:mk_imm(Offset2), int32, unsigned)]
+      [Untag,
+       hipe_rtl:mk_load(DstHi, Base, hipe_rtl:mk_imm(Offset1), int32, unsigned),
+       hipe_rtl:mk_load(DstLo, Base, hipe_rtl:mk_imm(Offset2), int32, unsigned)]
   end. 
 
 unsafe_untag_float(Dst, Src) ->
-  Offset = -(?TAG_PRIMARY_BOXED) + hipe_rtl_arch:word_size(),
-  [hipe_rtl:mk_fload(Dst, Src, hipe_rtl:mk_imm(Offset))].
+  {Base, Offset0, Untag} = untag_ptr(Src, ?TAG_PRIMARY_BOXED),
+  Offset = Offset0 + hipe_rtl_arch:word_size(),
+  [Untag, hipe_rtl:mk_fload(Dst, Base, hipe_rtl:mk_imm(Offset))].
 
 unsafe_tag_float(Dst, Src) ->
   {GetHPInsn, HP, PutHPInsn} = hipe_rtl_arch:heap_pointer(),
@@ -999,8 +1049,9 @@ get_one_word_pos_bignum(USize, Size, Fail) ->
 
 unsafe_get_one_word_pos_bignum(USize, Size) ->
   WordSize = hipe_rtl_arch:word_size(),
-  Imm = hipe_rtl:mk_imm(1*WordSize-?TAG_PRIMARY_BOXED),
-  [hipe_rtl:mk_load(USize, Size, Imm)].
+  {Base, Offset, Untag} = untag_ptr(Size, ?TAG_PRIMARY_BOXED),
+  Imm = hipe_rtl:mk_imm(1*WordSize+Offset),
+  [Untag, hipe_rtl:mk_load(USize, Base, Imm)].
 
 -spec bignum_sizeneed(non_neg_integer()) -> non_neg_integer().
 
@@ -1040,7 +1091,7 @@ create_matchstate(Max, BinSize, Base, Offset, Orig, Ms) ->
   SizeInWords = ((ByteSize div WordSize) - 1),
   Header = hipe_rtl:mk_imm(mk_header(SizeInWords, ?TAG_HEADER_BIN_MATCHSTATE)),
   [GetHPInsn,
-   hipe_rtl:mk_alu(Ms, HP, add, hipe_rtl:mk_imm(?TAG_PRIMARY_BOXED)),
+   tag_boxed(Ms, HP),
    set_field_from_term({matchstate,thing_word}, Ms, Header),
    set_field_from_term({matchstate,{matchbuffer,orig}}, Ms, Orig),
    set_field_from_term({matchstate,{matchbuffer,base}}, Ms, Base),
@@ -1078,7 +1129,10 @@ convert_matchstate(Ms) ->
    size_from_header(SizeInWords, Header),
    hipe_rtl:mk_alu(Hole, SizeInWords, sub, hipe_rtl:mk_imm(?SUB_BIN_WORDSIZE)),
    mk_var_header(BigIntHeader, Hole, ?TAG_HEADER_POS_BIG),
-   hipe_rtl:mk_store(Ms, hipe_rtl:mk_imm(?SUB_BIN_WORDSIZE*WordSize-?TAG_PRIMARY_BOXED),
+   %% Matchstates can't be literals; so untagging with ?TAG_PRIMARY_BOXED is
+   %% fine here
+   hipe_rtl:mk_store(Ms, hipe_rtl:mk_imm(?SUB_BIN_WORDSIZE*WordSize
+                                         -?TAG_PRIMARY_BOXED),
 		     BigIntHeader)].
 
 compare_matchstate(Max, Ms, LargeEnough, TooSmall) ->
@@ -1087,8 +1141,10 @@ compare_matchstate(Max, Ms, LargeEnough, TooSmall) ->
   SizeInWords = ((ByteSize div WordSize) - 1),
   Header = hipe_rtl:mk_imm(mk_header(SizeInWords, ?TAG_HEADER_BIN_MATCHSTATE)),
   RealHeader = hipe_rtl:mk_new_reg_gcsafe(),
-   [hipe_rtl:mk_load(RealHeader, Ms, hipe_rtl:mk_imm(-?TAG_PRIMARY_BOXED)),
-    hipe_rtl:mk_branch(RealHeader, ge, Header, LargeEnough, TooSmall)].
+  %% Matchstates can't be literals; so untagging with ?TAG_PRIMARY_BOXED is fine
+  %% here
+  [hipe_rtl:mk_load(RealHeader, Ms, hipe_rtl:mk_imm(-?TAG_PRIMARY_BOXED)),
+   hipe_rtl:mk_branch(RealHeader, ge, Header, LargeEnough, TooSmall)].
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%
@@ -1207,15 +1263,22 @@ get_field_size1({matchbuffer, base}) ->
 get_field_size1({matchbuffer, binsize}) ->  
   ?MB_SIZE_SIZE.
 
+get_field_addr_from_term(Struct, Term, Dst) ->
+  {Base, Offset0, Untag} = untag_ptr(Term, ?TAG_PRIMARY_BOXED),
+  Offset = hipe_rtl:mk_imm(get_field_offset(Struct) + Offset0),
+  [Untag, hipe_rtl:mk_alu(Dst, Base, add, Offset)].
+
 get_field_from_term(Struct, Term, Dst) ->
-  Offset = hipe_rtl:mk_imm(get_field_offset(Struct) - ?TAG_PRIMARY_BOXED),
+  {Base, Offset0, Untag} = untag_ptr(Term, ?TAG_PRIMARY_BOXED),
+  Offset = hipe_rtl:mk_imm(get_field_offset(Struct) + Offset0),
   Size = get_field_size(Struct),
-  hipe_rtl:mk_load(Dst, Term, Offset, Size, unsigned). 
+  [Untag, hipe_rtl:mk_load(Dst, Base, Offset, Size, unsigned)].
 
 set_field_from_term(Struct, Term, Value) ->
-  Offset = hipe_rtl:mk_imm(get_field_offset(Struct) - ?TAG_PRIMARY_BOXED),
+  {Base, Offset0, Untag} = untag_ptr(Term, ?TAG_PRIMARY_BOXED),
+  Offset = hipe_rtl:mk_imm(get_field_offset(Struct) + Offset0),
   Size = get_field_size(Struct),
-  hipe_rtl:mk_store(Term, Offset, Value, Size).
+  [Untag, hipe_rtl:mk_store(Base, Offset, Value, Size)].
 
 get_field_from_pointer(Struct, Term, Dst) ->
   Offset = hipe_rtl:mk_imm(get_field_offset(Struct)),
@@ -1229,6 +1292,8 @@ set_field_from_pointer(Struct, Term, Value) ->
   
 extract_matchbuffer(Mb, Ms) ->
   What = {matchstate, matchbuffer},
+  %% Matchstates can't be literals; so untagging with ?TAG_PRIMARY_BOXED is fine
+  %% here
   Offset = hipe_rtl:mk_imm(get_field_offset(What) - ?TAG_PRIMARY_BOXED),
   hipe_rtl:mk_alu(Mb, Ms, add, Offset).
 
diff --git a/lib/hipe/ssa/hipe_ssa.inc b/lib/hipe/ssa/hipe_ssa.inc
index c7c1a8e1d7..29e8b92266 100644
--- a/lib/hipe/ssa/hipe_ssa.inc
+++ b/lib/hipe/ssa/hipe_ssa.inc
@@ -463,20 +463,20 @@ updateStatementDefs([], Statement, Current, Acc) ->
 %%----------------------------------------------------------------------
 
 updateIndices(Current, Variable) ->
-  case ?CODE:is_var(Variable) of
-    true ->
-      NewVar = ?CODE:mk_new_var(),
-      {NewVar,gb_trees:enter(Variable, NewVar, Current)};
-    false ->
-      case is_fp_temp(Variable) of
-	true ->
-	  NewFVar = mk_new_fp_temp(),
-	  {NewFVar,gb_trees:enter(Variable, NewFVar, Current)};
-	false ->
-	  NewReg = ?CODE:mk_new_reg(),
-	  {NewReg,gb_trees:enter(Variable, NewReg, Current)}
-      end
-  end.
+  New =
+    case ?CODE:is_var(Variable) of
+      true -> ?CODE:mk_new_var();
+      false ->
+        case is_fp_temp(Variable) of
+          true -> mk_new_fp_temp();
+          false ->
+            case ?CODE:reg_is_gcsafe(Variable) of
+              true -> ?CODE:mk_new_reg_gcsafe();
+              false -> ?CODE:mk_new_reg()
+            end
+        end
+    end,
+  {New, gb_trees:enter(Variable, New, Current)}.
 
 %%----------------------------------------------------------------------
 %% Procedure : updateSuccPhi/4
diff --git a/lib/hipe/test/basic_SUITE_data/basic_exceptions.erl b/lib/hipe/test/basic_SUITE_data/basic_exceptions.erl
index d71b924d22..ba9c03d4ba 100644
--- a/lib/hipe/test/basic_SUITE_data/basic_exceptions.erl
+++ b/lib/hipe/test/basic_SUITE_data/basic_exceptions.erl
@@ -24,6 +24,7 @@ test() ->
   ok = test_bad_fun_call(),
   ok = test_guard_bif(),
   ok = test_eclectic(),
+  ok = test_raise(),
   ok.
 
 %%--------------------------------------------------------------------
@@ -579,3 +580,99 @@ my_add(A, B) ->
 
 my_abs(X) ->
   abs(X).
+
+test_raise() ->
+  test_raise(fun() -> exit({exit,tuple}) end),
+  test_raise(fun() -> abs(id(x)) end),
+  test_raise(fun() -> throw({was,thrown}) end),
+
+  badarg = bad_raise(fun() -> abs(id(x)) end),
+
+  ok.
+
+bad_raise(Expr) ->
+  try
+    Expr()
+  catch
+    _:E:Stk ->
+      erlang:raise(bad_class, E, Stk)
+  end.
+
+test_raise(Expr) ->
+  test_raise_1(Expr),
+  test_raise_2(Expr),
+  test_raise_3(Expr).
+
+test_raise_1(Expr) ->
+  erase(exception),
+  try
+    do_test_raise_1(Expr)
+  catch
+    C:E:Stk ->
+      {C,E,Stk} = erase(exception)
+  end.
+
+do_test_raise_1(Expr) ->
+  try
+    Expr()
+  catch
+    C:E:Stk ->
+      %% Here the stacktrace must be built.
+      put(exception, {C,E,Stk}),
+      erlang:raise(C, E, Stk)
+  end.
+
+test_raise_2(Expr) ->
+  erase(exception),
+  try
+    do_test_raise_2(Expr)
+  catch
+    C:E:Stk ->
+      {C,E} = erase(exception),
+      try
+        Expr()
+      catch
+        _:_:S ->
+          [StkTop|_] = S,
+          [StkTop|_] = Stk
+      end
+  end.
+
+do_test_raise_2(Expr) ->
+  try
+    Expr()
+  catch
+    C:E:Stk ->
+      %% Here it is possible to replace erlang:raise/3 with
+      %% the raw_raise/3 instruction since the stacktrace is
+      %% not actually used.
+      put(exception, {C,E}),
+      erlang:raise(C, E, Stk)
+  end.
+
+test_raise_3(Expr) ->
+  try
+    do_test_raise_3(Expr)
+  catch
+    exit:{exception,C,E}:Stk ->
+      try
+        Expr()
+      catch
+        C:E:S ->
+          [StkTop|_] = S,
+          [StkTop|_] = Stk
+      end
+  end.
+
+do_test_raise_3(Expr) ->
+  try
+    Expr()
+  catch
+    C:E:Stk ->
+      %% Here it is possible to replace erlang:raise/3 with
+      %% the raw_raise/3 instruction since the stacktrace is
+      %% not actually used.
+      erlang:raise(exit, {exception,C,E}, Stk)
+  end.
+
+id(I) -> I.
diff --git a/lib/hipe/test/basic_SUITE_data/basic_receive.erl b/lib/hipe/test/basic_SUITE_data/basic_receive.erl
index 5f865d7b7a..20e3f350e8 100644
--- a/lib/hipe/test/basic_SUITE_data/basic_receive.erl
+++ b/lib/hipe/test/basic_SUITE_data/basic_receive.erl
@@ -12,6 +12,7 @@ test() ->
   ok = test_wait_timeout(),
   ok = test_double_timeout(),
   ok = test_reschedule(),
+  ok = test_recv_mark(),
   ok.
 
 %%--------------------------------------------------------------------
@@ -54,3 +55,91 @@ doit(First) ->
   erts_debug:set_internal_state(hipe_test_reschedule_suspend, 1).
 
 %%--------------------------------------------------------------------
+%% Check that we cannot cause a recv_mark,recv_set pair to misbehave and
+%% deadlock the process.
+
+test_recv_mark() ->
+  ok = test_recv_mark(fun disturber_nop/0),
+  ok = test_recv_mark(fun disturber_receive/0),
+  ok = test_recv_mark(fun disturber_other/0),
+  ok = test_recv_mark(fun disturber_recurse/0),
+  ok = test_recv_mark_after(self(), fun disturber_after_recurse/0, false),
+  ok = test_recv_mark(fun disturber_other_recurse/0),
+  ok = test_recv_mark(fun disturber_other_after/0),
+  ok = test_recv_mark_nested().
+
+test_recv_mark(Disturber) ->
+  Ref = make_ref(),
+  self() ! Ref,
+  Disturber(),
+  receive Ref -> ok
+  after 0 -> error(failure)
+  end.
+
+disturber_nop() -> ok.
+
+disturber_receive() ->
+  self() ! message,
+  receive message -> ok end.
+
+disturber_other() ->
+  Ref = make_ref(),
+  self() ! Ref,
+  receive Ref -> ok end.
+
+disturber_recurse() ->
+  aborted = (catch test_recv_mark(fun() -> throw(aborted) end)),
+  ok.
+
+test_recv_mark_after(Recipient, Disturber, IsInner) ->
+  Ref = make_ref(),
+  Recipient ! Ref,
+  Disturber(),
+  receive
+      Ref -> ok
+  after 0 ->
+          case IsInner of
+              true -> expected;
+              false -> error(failure)
+          end
+  end.
+
+disturber_after_recurse() ->
+  NoOp = fun() -> ok end,
+  BlackHole = spawn(NoOp),
+  expected = test_recv_mark_after(BlackHole, NoOp, true),
+  ok.
+
+disturber_other_recurse() ->
+  aborted = (catch disturber_other_recurse(fun() -> throw(aborted) end)),
+  ok.
+
+disturber_other_recurse(InnerD) ->
+  Ref = make_ref(),
+  self() ! Ref,
+  InnerD(),
+  receive Ref -> ok
+  after 0 -> error(failure)
+  end.
+
+disturber_other_after() ->
+  BlackHole = spawn(fun() -> ok end),
+  Ref = make_ref(),
+  BlackHole ! Ref,
+  receive Ref -> error(imposible)
+  after 0 -> ok
+  end.
+
+test_recv_mark_nested() ->
+  Ref1 = make_ref(),
+  self() ! Ref1,
+  begin
+    Ref2 = make_ref(),
+    self() ! Ref2,
+    receive Ref2 -> ok end
+  end,
+  receive Ref1 -> ok
+  after 0 -> error(failure)
+  end.
+
+%%--------------------------------------------------------------------
diff --git a/lib/hipe/test/bs_SUITE_data/bs_construct.erl b/lib/hipe/test/bs_SUITE_data/bs_construct.erl
index b9e7d93570..aa85626857 100644
--- a/lib/hipe/test/bs_SUITE_data/bs_construct.erl
+++ b/lib/hipe/test/bs_SUITE_data/bs_construct.erl
@@ -279,13 +279,22 @@ bad_floats() ->
 %% (incorrectly) signed.
 
 huge_binaries() ->
-  AlmostIllegal = id(<<0:(id((1 bsl 32)-8))>>),
   case erlang:system_info(wordsize) of
-    4 -> huge_binaries_32(AlmostIllegal);
+    4 ->
+      Old = erts_debug:set_internal_state(available_internal_state, true),
+      case erts_debug:set_internal_state(binary, (1 bsl 29)-1) of
+        false ->
+          io:format("\nNot enough memory to create 512Mb binary\n",[]);
+        Bin->
+          huge_binaries_32(Bin)
+      end,
+      erts_debug:set_internal_state(available_internal_state, Old);
+
     8 -> ok
   end,
   garbage_collect(),
   id(<<0:(id((1 bsl 31)-1))>>),
+  garbage_collect(),
   id(<<0:(id((1 bsl 30)-1))>>),
   garbage_collect(),
   ok.
diff --git a/lib/hipe/test/hipe_testsuite_driver.erl b/lib/hipe/test/hipe_testsuite_driver.erl
index ee9c57a908..8813af5dfc 100644
--- a/lib/hipe/test/hipe_testsuite_driver.erl
+++ b/lib/hipe/test/hipe_testsuite_driver.erl
@@ -161,7 +161,8 @@ run(TestCase, Dir, _OutDir) ->
     %% 		  end, DataFiles),
     %% try
     ok = TestCase:test(),
-    HiPEOpts = try TestCase:hipe_options() catch error:undef -> [] end,
+    HiPEOpts0 = try TestCase:hipe_options() catch error:undef -> [] end,
+    HiPEOpts = HiPEOpts0 ++ hipe_options(),
     {ok, TestCase} = hipe:c(TestCase, HiPEOpts),
     ok = TestCase:test(),
     {ok, TestCase} = hipe:c(TestCase, [o1|HiPEOpts]),
@@ -179,3 +180,6 @@ run(TestCase, Dir, _OutDir) ->
     %% 	lists:foreach(fun (DF) -> ok end, % = file:delete(DF) end,
     %% 		      [filename:join(OutDir, D) || D <- DataFiles])
     %% end.
+
+hipe_options() ->
+    [verify_gcsafe].
diff --git a/lib/hipe/vsn.mk b/lib/hipe/vsn.mk
index f88d9147b1..0c517f9a7a 100644
--- a/lib/hipe/vsn.mk
+++ b/lib/hipe/vsn.mk
@@ -1 +1 @@
-HIPE_VSN = 3.16.1
+HIPE_VSN = 3.17.1
diff --git a/lib/hipe/x86/hipe_rtl_to_x86.erl b/lib/hipe/x86/hipe_rtl_to_x86.erl
index 31e4f6e4ac..22947da148 100644
--- a/lib/hipe/x86/hipe_rtl_to_x86.erl
+++ b/lib/hipe/x86/hipe_rtl_to_x86.erl
@@ -646,7 +646,7 @@ conv_imm(Opnd, Map) ->
 is_imm64(Value) when is_integer(Value) ->
   (Value < -(1 bsl (32 - 1))) or (Value > (1 bsl (32 - 1)) - 1);
 is_imm64({_,atom})    -> false; % Atoms are 32 bits.
-is_imm64({_,c_const}) -> false; % c_consts are 32 bits.
+is_imm64({_,c_const}) -> true;  % c_consts are 64 bits.
 is_imm64({_,_})       -> true . % Other relocs are 64 bits.
 -else.
 conv_imm(Opnd, Map) ->
@@ -777,6 +777,18 @@ conv_fconv(Dst, Src) ->
 
 %%% Finalise the conversion of a 2-address FP operation.
 
+-ifdef(HIPE_AMD64).
+conv_fp_unary(Dst, Src, 'fchs') ->
+  Tmp = new_untagged_temp(),
+  case same_opnd(Dst, Src) of
+    true ->
+      [];
+    _ ->
+      [hipe_x86:mk_fmove(Src, Dst)]
+  end ++
+    mk_load_address(c_const, hipe_x86:mk_imm({sse2_fnegate_mask, c_const}), Tmp) ++
+    [hipe_x86:mk_fp_binop('xorpd', hipe_x86:mk_mem(Tmp, hipe_x86:mk_imm(0), double), Dst)].
+-else.
 conv_fp_unary(Dst, Src, FpUnOp) ->
   case same_opnd(Dst, Src) of
     true ->
@@ -785,6 +797,7 @@ conv_fp_unary(Dst, Src, FpUnOp) ->
       [hipe_x86:mk_fmove(Src, Dst),
        hipe_x86:mk_fp_unop(FpUnOp, Dst)]
   end.
+-endif.
 
 conv_fp_unop(RtlFpUnOp) ->
   case RtlFpUnOp of
@@ -854,13 +867,8 @@ mk_jmp_switch(Index, JTabLab, Labels) ->
 %%% Finalise the translation of a load_address instruction.
 
 -ifdef(HIPE_AMD64).
-mk_load_address(Type, Src, Dst) ->
-  case Type of
-    c_const -> % 32 bits
-      [hipe_x86:mk_move(Src, Dst)];
-    _ ->
-      [hipe_x86:mk_move64(Src, Dst)]
-  end.
+mk_load_address(_Type, Src, Dst) ->
+  [hipe_x86:mk_move64(Src, Dst)].
 -else.
 mk_load_address(_Type, Src, Dst) ->
   [hipe_x86:mk_move(Src, Dst)].
diff --git a/lib/hipe/x86/hipe_x86_assemble.erl b/lib/hipe/x86/hipe_x86_assemble.erl
index 50919bdf4e..9d2586a14d 100644
--- a/lib/hipe/x86/hipe_x86_assemble.erl
+++ b/lib/hipe/x86/hipe_x86_assemble.erl
@@ -735,6 +735,7 @@ resolve_sse2_op(Op) ->
     fdiv -> divsd;
     fmul -> mulsd;
     fsub -> subsd;
+    xorpd -> xorpd;
     _ -> exit({?MODULE, unknown_sse2_operator, Op})
   end.
 
diff --git a/lib/ic/doc/src/notes.xml b/lib/ic/doc/src/notes.xml
index ea8bf758cf..fc68ec386c 100644
--- a/lib/ic/doc/src/notes.xml
+++ b/lib/ic/doc/src/notes.xml
@@ -31,7 +31,22 @@
     <file>notes.xml</file>
   </header>
 
-   <section><title>IC 4.4.2</title>
+   <section><title>IC 4.4.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>IC 4.4.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
       <list>
diff --git a/lib/ic/test/c_client_erl_server_SUITE_data/c_client.c b/lib/ic/test/c_client_erl_server_SUITE_data/c_client.c
index b3a18e03d4..446b46ad82 100644
--- a/lib/ic/test/c_client_erl_server_SUITE_data/c_client.c
+++ b/lib/ic/test/c_client_erl_server_SUITE_data/c_client.c
@@ -1365,8 +1365,8 @@ static int cmp_strRec(m_strRec *b1, m_strRec *b2)
 	    return 0;
     if (!cmp_str(b1->str6,b2->str6))
 	return 0;
-    for (i = 0; i < 2; i++)
-	for (j = 0; j < 3; j++)
+    for (i = 0; i < 3; i++)
+	for (j = 0; j < 2; j++)
 	    if (b1->str7[i][j] != b2->str7[i][j])
 		return 0;
     for (j = 0; j < 3; j++)
@@ -1579,8 +1579,8 @@ static void print_strRec(m_strRec* sr)
     fprintf(stdout, "\nboolean bb : %d\n",sr->bb);
     fprintf(stdout, "string str4 : %s\n",sr->str4);
     fprintf(stdout, "str7[2][3] :\n");
-    for (i = 0; i < 2; i++)
-	for (j = 0; j < 3; j++)
+    for (i = 0; i < 3; i++)
+	for (j = 0; j < 2; j++)
 	    fprintf(stdout, "str7[%d][%d]: %ld\n", i, j, sr->str7[i][j]);
     fprintf(stdout, "str5._length : %ld\n",sr->str5._length);
     for (j = 0; j < sr->str5._length; j++)
diff --git a/lib/ic/test/c_client_erl_server_proto_SUITE_data/c_client.c b/lib/ic/test/c_client_erl_server_proto_SUITE_data/c_client.c
index 40c7328f03..d6a78d2481 100644
--- a/lib/ic/test/c_client_erl_server_proto_SUITE_data/c_client.c
+++ b/lib/ic/test/c_client_erl_server_proto_SUITE_data/c_client.c
@@ -1369,8 +1369,8 @@ static int cmp_strRec(m_strRec *b1, m_strRec *b2)
 	    return 0;
     if (!cmp_str(b1->str6,b2->str6))
 	return 0;
-    for (i = 0; i < 2; i++)
-	for (j = 0; j < 3; j++)
+    for (i = 0; i < 3; i++)
+	for (j = 0; j < 2; j++)
 	    if (b1->str7[i][j] != b2->str7[i][j])
 		return 0;
     for (j = 0; j < 3; j++)
@@ -1583,8 +1583,8 @@ static void print_strRec(m_strRec* sr)
     fprintf(stdout, "\nboolean bb : %d\n",sr->bb);
     fprintf(stdout, "string str4 : %s\n",sr->str4);
     fprintf(stdout, "str7[2][3] :\n");
-    for (i = 0; i < 2; i++)
-	for (j = 0; j < 3; j++)
+    for (i = 0; i < 3; i++)
+	for (j = 0; j < 2; j++)
 	    fprintf(stdout, "str7[%d][%d]: %ld\n", i, j, sr->str7[i][j]);
     fprintf(stdout, "str5._length : %ld\n",sr->str5._length);
     for (j = 0; j < sr->str5._length; j++)
diff --git a/lib/ic/test/c_client_erl_server_proto_tmo_SUITE_data/c_client.c b/lib/ic/test/c_client_erl_server_proto_tmo_SUITE_data/c_client.c
index 33cfe71322..17ef21f4f4 100644
--- a/lib/ic/test/c_client_erl_server_proto_tmo_SUITE_data/c_client.c
+++ b/lib/ic/test/c_client_erl_server_proto_tmo_SUITE_data/c_client.c
@@ -1369,8 +1369,8 @@ static int cmp_strRec(m_strRec *b1, m_strRec *b2)
 	    return 0;
     if (!cmp_str(b1->str6,b2->str6))
 	return 0;
-    for (i = 0; i < 2; i++)
-	for (j = 0; j < 3; j++)
+    for (i = 0; i < 3; i++)
+	for (j = 0; j < 2; j++)
 	    if (b1->str7[i][j] != b2->str7[i][j])
 		return 0;
     for (j = 0; j < 3; j++)
@@ -1583,8 +1583,8 @@ static void print_strRec(m_strRec* sr)
     fprintf(stdout, "\nboolean bb : %d\n",sr->bb);
     fprintf(stdout, "string str4 : %s\n",sr->str4);
     fprintf(stdout, "str7[2][3] :\n");
-    for (i = 0; i < 2; i++)
-	for (j = 0; j < 3; j++)
+    for (i = 0; i < 3; i++)
+	for (j = 0; j < 2; j++)
 	    fprintf(stdout, "str7[%d][%d]: %ld\n", i, j, sr->str7[i][j]);
     fprintf(stdout, "str5._length : %ld\n",sr->str5._length);
     for (j = 0; j < sr->str5._length; j++)
diff --git a/lib/ic/vsn.mk b/lib/ic/vsn.mk
index f0e5e7c266..b9f1ef7f20 100644
--- a/lib/ic/vsn.mk
+++ b/lib/ic/vsn.mk
@@ -1 +1 @@
-IC_VSN = 4.4.2
+IC_VSN = 4.4.3
diff --git a/lib/inets/doc/src/Makefile b/lib/inets/doc/src/Makefile
index 14f12ee949..cbfa5c9e30 100644
--- a/lib/inets/doc/src/Makefile
+++ b/lib/inets/doc/src/Makefile
@@ -39,6 +39,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN)
 XML_APPLICATION_FILES = ref_man.xml
 
 XML_CHAPTER_FILES = \
+	introduction.xml \
 	inets_services.xml \
 	http_client.xml \
 	http_server.xml \
diff --git a/lib/inets/doc/src/http_client.xml b/lib/inets/doc/src/http_client.xml
index 212958f17f..15e383ec77 100644
--- a/lib/inets/doc/src/http_client.xml
+++ b/lib/inets/doc/src/http_client.xml
@@ -97,27 +97,32 @@
       7 > {ok, {{NewVersion, 200, NewReasonPhrase}, NewHeaders, NewBody}} =
       httpc:request(get, {"http://www.erlang.org", [{"connection", "close"}]},
       [], []).</code>
-
+    <p>This sends an HTTP request over a unix domain socket (experimental):</p>
+    <code type="erl">
+      8 > httpc:set_options([{ipfamily, local},
+      {unix_socket,"/tmp/unix_socket/consul_http.sock"}]).
+      9 > {ok, {{NewVersion, 200, NewReasonPhrase}, NewHeaders, NewBody}} =
+      httpc:request(put, {"http:///v1/kv/foo", [], [], "hello"}, [], []).</code>
     <p>Start an HTTP client profile:</p>
    
     <code><![CDATA[
-      8 > {ok, Pid} = inets:start(httpc, [{profile, foo}]).
+      10 > {ok, Pid} = inets:start(httpc, [{profile, foo}]).
       {ok, <0.45.0>}       
       ]]></code>
     
     <p>The new profile has no proxy settings, so the connection is refused:</p>
       <code type="erl">
-      9 > httpc:request("http://www.erlang.org", foo). 
+      11 > httpc:request("http://www.erlang.org", foo).
       {error, econnrefused}</code>
 
     <p>Stop the HTTP client profile:</p>
     <code type="erl">
-      10 > inets:stop(httpc, foo).
+      12 > inets:stop(httpc, foo).
       ok</code>
     
     <p>Alternative way to stop the HTTP client profile:</p>
     <code type="erl">
-      10 > inets:stop(httpc, Pid).
+      13 > inets:stop(httpc, Pid).
       ok</code>
     
   </section>
diff --git a/lib/inets/doc/src/http_uri.xml b/lib/inets/doc/src/http_uri.xml
index 20c042c202..f57214a7ce 100644
--- a/lib/inets/doc/src/http_uri.xml
+++ b/lib/inets/doc/src/http_uri.xml
@@ -45,7 +45,6 @@
       this module:</p>
     <p><c>boolean() = true | false</c></p>
     <p><c>string()</c> = list of ASCII characters</p>
-    <p><c>unicode_binary()</c> = binary() with characters encoded in the UTF-8 coding standard</p>
 
   </section>
   
@@ -54,22 +53,22 @@
     <p>Type definitions that are related to URI:</p>
     
 <taglist>
-       <tag><c>uri() = string() | unicode:unicode_binary()</c></tag>
+       <tag><c>uri() = string() | binary()</c></tag>
        <item><p>Syntax according to the URI definition in RFC 3986,
        for example, "http://www.erlang.org/"</p></item>
-       <tag><c>user_info() = string() | unicode:unicode_binary()</c></tag>
+       <tag><c>user_info() = string() | binary()</c></tag>
        <item><p></p></item>
        <tag><c>scheme() = atom()</c></tag>
        <item><p>Example: http, https</p></item>
-       <tag><c>host() = string() | unicode:unicode_binary()</c></tag>
+       <tag><c>host() = string() | binary()</c></tag>
        <item><p></p></item>
-       <tag><c>port() = pos_integer()</c></tag>
+       <tag><c>port() = inet:port_number()</c></tag>
        <item><p></p></item>
-       <tag><c>path() = string() | unicode:unicode_binary()</c></tag>
+       <tag><c>path() = string() | binary()</c></tag>
        <item><p>Represents a file path or directory path</p></item>
-       <tag><c>query() = string() | unicode:unicode_binary()</c></tag>
+       <tag><c>query() = string() | binary()</c></tag>
        <item><p></p></item>
-       <tag><c>fragment() = string() | unicode:unicode_binary()</c></tag>
+       <tag><c>fragment() = string() | binary()</c></tag>
        <item><p></p></item>
      </taglist>
    
@@ -84,7 +83,7 @@
       
       <fsummary>Decodes a hexadecimal encoded URI.</fsummary>
       <type>
-        <v>HexEncodedURI = string() | unicode:unicode_binary() - A possibly hexadecimal encoded URI</v>
+        <v>HexEncodedURI = string() | binary() - A possibly hexadecimal encoded URI</v>
         <v>URI = uri()</v>
       </type>
 
@@ -99,7 +98,7 @@
       <fsummary>Encodes a hexadecimal encoded URI.</fsummary>
       <type>
         <v>URI = uri()</v>
-        <v>HexEncodedURI = string() | unicode:unicode_binary() - Hexadecimal encoded URI</v>
+        <v>HexEncodedURI = string() | binary() - Hexadecimal encoded URI</v>
       </type>
 
       <desc>
@@ -119,12 +118,13 @@
         <v>Option = {ipv6_host_with_brackets, boolean()} | 
                     {scheme_defaults, scheme_defaults()} |
                     {fragment, boolean()} |
-                    {scheme_validation_fun, fun()}]</v>
+                    {scheme_validation_fun, fun()}</v>
         <v>Result = {Scheme, UserInfo, Host, Port, Path, Query} |
                     {Scheme, UserInfo, Host, Port, Path, Query, Fragment}</v>
+	<v>Scheme = scheme()</v>
 	<v>UserInfo = user_info()</v>
 	<v>Host = host()</v>
-	<v>Port = pos_integer()</v>
+	<v>Port = inet:port_number()</v>
 	<v>Path = path()</v>
 	<v>Query = query()</v>
         <v>Fragment = fragment()</v>
@@ -146,13 +146,20 @@
         <p>Scheme validation fun is to be defined as follows:</p>
 
 	<code>
-fun(SchemeStr :: string() | unicode:unicode_binary()) ->
+fun(SchemeStr :: string() | binary()) ->
 	valid |	{error, Reason :: term()}.
 	</code>
 
         <p>It is called before scheme string gets converted into scheme atom and
         thus possible atom leak could be prevented</p>
 
+        <warning>
+          <p>The scheme portion of the URI gets converted into atom,
+          meaning that atom leak may occur. Specifying a scheme
+          validation fun is recommended unless the URI is already
+          sanitized.</p>
+        </warning>
+
         <marker id="encode"></marker>
       </desc>
     </func>
@@ -162,7 +169,7 @@ fun(SchemeStr :: string() | unicode:unicode_binary()) ->
       <fsummary>A list of the scheme and their default ports.</fsummary>
       <type>
         <v>SchemeDefaults = [{scheme(), default_scheme_port_number()}] </v> 
-	<v>default_scheme_port_number() = pos_integer()</v>
+	<v>default_scheme_port_number() = inet:port_number()</v>
       </type>
       <desc>
         <p>Provides a list of the scheme and their default 
diff --git a/lib/inets/doc/src/httpc.xml b/lib/inets/doc/src/httpc.xml
index 29e4b22632..14662f257c 100644
--- a/lib/inets/doc/src/httpc.xml
+++ b/lib/inets/doc/src/httpc.xml
@@ -210,7 +210,8 @@
 			   ip | 
 			   port | 
 			   socket_opts | 
-	                   verbose</v>
+	                   verbose |
+	                   unix_socket</v>
 	<v>Profile = profile() | pid()</v>
 	<d>When started <c>stand_alone</c> only the pid can used.</d>
         <v>Values = [{option_item(), term()}]</v>
@@ -287,8 +288,7 @@
                            {autoredirect,    boolean()} | 
                            {proxy_auth, {userstring(), passwordstring()}} | 
                            {version,         http_version()} | 
-                           {relaxed,         boolean()} |
-	                   {url_encode,      boolean()}</v>
+                           {relaxed,         boolean()}</v>
         <v>timeout() = integer() >= 0 | infinity</v>
         <v>Options = options()</v>
         <v>options() = [option()]</v>
@@ -298,8 +298,8 @@
                       {full_result,             boolean()} | 
                       {headers_as_is,           boolean() |
                       {socket_opts,             socket_opts()} | 
-                      {receiver,                receiver()},
-	              {ipv6_host_with_brackets, boolean()}}</v>
+                      {receiver,                receiver()} |
+	              {ipv6_host_with_brackets, boolean()}</v>
         <v>stream_to() = none | self | {self, once} | filename()</v>
         <v>socket_opts() = [socket_opt()]</v>
         <v>receiver() = pid() | function()/1 | {Module, Function, Args}</v>
@@ -379,13 +379,6 @@
 	    from the HTTP-standard are enabled.</p>
             <p>Default is <c>false</c>.</p>
 	  </item>
-
-	  <tag><c><![CDATA[url_encode]]></c></tag>
-          <item>
-            <p>Applies Percent-encoding, also known as URL encoding on the 
-	    URL.</p>
-	    <p>Default is <c>false</c>.</p>
-	  </item>
         </taglist>
 
         <p>Option (<c>option()</c>) details:</p>
@@ -541,7 +534,8 @@
 	<v>| {ip, IpAddress}</v>
 	<v>| {port, Port}</v>
 	<v>| {socket_opts, socket_opts()}</v>
-	<v>| {verbose, VerboseMode}</v>	    
+	<v>| {verbose, VerboseMode}</v>
+	<v>| {unix_socket, UnixSocket}</v>
         <v>Proxy = {Hostname, Port}</v>
         <v>Hostname = string()</v>
         <d>Example: "localhost" or "foo.bar.se"</d>
@@ -584,7 +578,7 @@
 	If option <c>verify</c> is used, function <c>store_cookies/2</c>
 	has to be called for the cookies to be saved. 
 	Default is <c>disabled</c>.</d>
-	<v>IpFamily = inet | inet6 </v>
+	<v>IpFamily = inet | inet6 | local</v>
 	<d>Default is <c>inet</c>.</d>
 	<v>IpAddress = ip_address()</v>
 	<d>If the host has several network interfaces, this option specifies 
@@ -609,6 +603,12 @@
 	It is a debug feature.</d>
 	<v>Profile = profile() | pid()</v>
 	<d>When started <c>stand_alone</c> only the pid can be used.</d>
+	<v>UnixSocket = path()</v>
+	<d>
+	  Experimental option for sending HTTP requests over a unix domain socket. The value
+	  of <c>unix_socket</c> shall be the full path to a unix domain socket file with read/write
+	  permissions for the erlang process. Default is <c>undefined</c>.
+	</d>
       </type>
       <desc>
 	<p>Sets options to be used for subsequent requests.</p>
diff --git a/lib/inets/doc/src/notes.xml b/lib/inets/doc/src/notes.xml
index 10ef84d7cf..0417e07de8 100644
--- a/lib/inets/doc/src/notes.xml
+++ b/lib/inets/doc/src/notes.xml
@@ -33,7 +33,118 @@
     <file>notes.xml</file>
   </header>
   
-  <section><title>Inets 6.4.2</title>
+  <section><title>Inets 6.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    httpc_manager crashes when a long running request is sent
+	    on a persistent HTTP connection (keep-alive). Fixed
+	    httpc_manager to use proper timeouts on keep-alive
+	    connections.</p>
+          <p>
+	    Own Id: OTP-14908</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Add support for unix domain sockets in the http client.</p>
+          <p>
+	    Own Id: OTP-14854</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Inets 6.4.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    CGI environment variable CONTENT_LENGTH shall be a string</p>
+          <p>
+	    Own Id: OTP-14679</p>
+        </item>
+        <item>
+          <p>
+	    In relaxed mode disregard Content-Length header if there
+	    is also a Transfer-Encoding header.</p>
+          <p>
+	    Own Id: OTP-14727</p>
+        </item>
+        <item>
+          <p>
+	    Eliminated race condition, that could cause http request
+	    to sporadically fail to complete successfully, when
+	    keep-alive connections are used.</p>
+          <p>
+	    Own Id: OTP-14783</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Inets 6.4.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Correct the handling of location headers so that the
+	    status code is not hard coded. This should have been
+	    fixed by commit 2cc5ba70cbbc6b3ace81a2a0324417c3b65265bb
+	    but unfortunately was broken during a code refactoring
+	    and unnoticed due to a faulty placed test case.</p>
+          <p>
+	    Own Id: OTP-14761</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Inets 6.4.3</title>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Fix broken handling of POST requests</p>
+          <p>
+	    New chunk mechanism of body data in POST requests added
+	    in 5d01c70ca399edf28e99dc760506329689fab6ba broke
+	    handling of POST body data not using the new mechanism.</p>
+          <p>
+	    Own Id: OTP-14656</p>
+        </item>
+        <item>
+          <p>
+	    Make sure ints:stop/2 of the service httpd is synchronous</p>
+          <p>
+	    Own Id: OTP-14696</p>
+        </item>
+        <item>
+          <p>
+	    Honor status code returned by ESI script and modernize
+	    "location" header handling.</p>
+          <p>
+	    Own Id: OTP-14716</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Inets 6.4.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
       <list>
diff --git a/lib/inets/src/http_client/httpc.erl b/lib/inets/src/http_client/httpc.erl
index bf2da82603..a73503a5ce 100644
--- a/lib/inets/src/http_client/httpc.erl
+++ b/lib/inets/src/http_client/httpc.erl
@@ -171,14 +171,15 @@ request(Method,
 	HTTPOptions, Options, Profile) 
   when (Method =:= options) orelse 
        (Method =:= get) orelse 
+       (Method =:= put) orelse
        (Method =:= head) orelse 
        (Method =:= delete) orelse 
        (Method =:= trace) andalso 
        (is_atom(Profile) orelse is_pid(Profile)) ->
-    case uri_parse(Url, Options) of
-	{error, Reason} ->
+    case uri_string:parse(uri_string:normalize(Url)) of
+	{error, Reason, _} ->
 	    {error, Reason};
-	{ok, ParsedUrl} ->
+	ParsedUrl ->
 	    case header_parse(Headers) of
 		{error, Reason} ->
 		    {error, Reason};
@@ -189,10 +190,10 @@ request(Method,
     end.
 
 do_request(Method, {Url, Headers, ContentType, Body}, HTTPOptions, Options, Profile) ->
-    case uri_parse(Url, Options) of
-	{error, Reason} ->
+    case uri_string:parse(uri_string:normalize(Url)) of
+	{error, Reason, _} ->
 	    {error, Reason};
-	{ok, ParsedUrl} ->
+	ParsedUrl ->
 	    handle_request(Method, Url, 
 			   ParsedUrl, Headers, ContentType, Body, 
 			   HTTPOptions, Options, Profile)
@@ -312,23 +313,28 @@ store_cookies(SetCookieHeaders, Url) ->
 
 store_cookies(SetCookieHeaders, Url, Profile) 
   when is_atom(Profile) orelse is_pid(Profile) ->
-    try 
-	begin
+    case uri_string:parse(uri_string:normalize(Url)) of
+        {error, Bad, _} ->
+            {error, {parse_failed, Bad}};
+        URI ->
+            Scheme = scheme_to_atom(maps:get(scheme, URI, '')),
+            Host = maps:get(host, URI, ""),
+            Port = maps:get(port, URI, default_port(Scheme)),
+            Path = uri_string:recompose(#{path => maps:get(path, URI, "")}),
 	    %% Since the Address part is not actually used
 	    %% by the manager when storing cookies, we dont
 	    %% care about ipv6-host-with-brackets.
-	    {ok, {_, _, Host, Port, Path, _}} = uri_parse(Url),
 	    Address     = {Host, Port}, 
 	    ProfileName = profile_name(Profile),
 	    Cookies     = httpc_cookie:cookies(SetCookieHeaders, Path, Host),
 	    httpc_manager:store_cookies(Cookies, Address, ProfileName), 
 	    ok
-	end
-    catch 
-	error:{badmatch, Bad} ->
-	    {error, {parse_failed, Bad}}
     end.
 
+default_port(http) ->
+    80;
+default_port(https) ->
+    443.
 
 %%--------------------------------------------------------------------------
 %% cookie_header(Url) -> Header | {error, Reason}
@@ -495,7 +501,7 @@ service_info(Pid) ->
 %%% Internal functions
 %%%========================================================================
 handle_request(Method, Url, 
-	       {Scheme, UserInfo, Host, Port, Path, Query}, 
+               URI,
 	       Headers0, ContentType, Body0,
 	       HTTPOptions0, Options0, Profile) ->
 
@@ -520,37 +526,42 @@ handle_request(Method, Url,
 			throw({error, {bad_body, Body0}})
 		end,
 
-	    HTTPOptions   = http_options(HTTPOptions0),
-	    Options       = request_options(Options0), 
-	    Sync          = proplists:get_value(sync,   Options),
-	    Stream        = proplists:get_value(stream, Options),
-	    Host2         = http_request:normalize_host(Scheme, Host, Port),
-	    HeadersRecord = header_record(NewHeaders, Host2, HTTPOptions),
-	    Receiver      = proplists:get_value(receiver, Options),
-	    SocketOpts    = proplists:get_value(socket_opts, Options),
-	    BracketedHost = proplists:get_value(ipv6_host_with_brackets, 
-						Options),
-	    MaybeEscPath  = maybe_encode_uri(HTTPOptions, Path),
-	    MaybeEscQuery = maybe_encode_uri(HTTPOptions, Query),
-	    AbsUri        = maybe_encode_uri(HTTPOptions, Url),
+            HTTPOptions   = http_options(HTTPOptions0),
+            Options       = request_options(Options0),
+            Sync          = proplists:get_value(sync,   Options),
+            Stream        = proplists:get_value(stream, Options),
+            Receiver      = proplists:get_value(receiver, Options),
+            SocketOpts    = proplists:get_value(socket_opts, Options),
+	    UnixSocket    = proplists:get_value(unix_socket, Options),
+            BracketedHost = proplists:get_value(ipv6_host_with_brackets,
+                                                Options),
+
+            Scheme        = scheme_to_atom(maps:get(scheme, URI, '')),
+            Userinfo      = maps:get(userinfo, URI, ""),
+            Host          = http_util:maybe_add_brackets(maps:get(host, URI, ""), BracketedHost),
+            Port          = maps:get(port, URI, default_port(Scheme)),
+            Host2         = http_request:normalize_host(Scheme, Host, Port),
+            Path          = uri_string:recompose(#{path => maps:get(path, URI, "")}),
+            Query         = add_question_mark(maps:get(query, URI, "")),
+            HeadersRecord = header_record(NewHeaders, Host2, HTTPOptions),
 
 	    Request = #request{from          = Receiver,
-			       scheme        = Scheme, 
-			       address       = {host_address(Host, BracketedHost), Port},
-			       path          = MaybeEscPath,
-			       pquery        = MaybeEscQuery,
+			       scheme        = Scheme,
+			       address       = {Host, Port},
+			       path          = Path,
+			       pquery        = Query,
 			       method        = Method,
 			       headers       = HeadersRecord, 
 			       content       = {ContentType, Body},
 			       settings      = HTTPOptions, 
-			       abs_uri       = AbsUri,
-			       userinfo      = UserInfo, 
+			       abs_uri       = Url,
+			       userinfo      = Userinfo,
 			       stream        = Stream, 
 			       headers_as_is = headers_as_is(Headers0, Options),
 			       socket_opts   = SocketOpts, 
 			       started       = Started,
+			       unix_socket   = UnixSocket,
 			       ipv6_host_with_brackets = BracketedHost},
-
 	    case httpc_manager:request(Request, profile_name(Profile)) of
 		{ok, RequestId} ->
 		    handle_answer(RequestId, Sync, Options);
@@ -565,14 +576,31 @@ handle_request(Method, Url,
 	    Error
     end.
 
+
+add_question_mark(<<>>) ->
+    <<>>;
+add_question_mark([]) ->
+    [];
+add_question_mark(Comp) when is_binary(Comp) ->
+    <<$?, Comp/binary>>;
+add_question_mark(Comp) when is_list(Comp) ->
+    [$?|Comp].
+
+
+scheme_to_atom("http") ->
+    http;
+scheme_to_atom("https") ->
+    https;
+scheme_to_atom('') ->
+    '';
+scheme_to_atom(Scheme) ->
+    throw({error, {bad_scheme, Scheme}}).
+
+
 ensure_chunked_encoding(Hdrs) ->
     Key = "transfer-encoding",
     lists:keystore(Key, 1, Hdrs, {Key, "chunked"}).
 
-maybe_encode_uri(#http_options{url_encode = true}, URI) ->
-    http_uri:encode(URI);
-maybe_encode_uri(_, URI) ->
-    URI.
 
 mk_chunkify_fun(ProcessBody) ->
     fun(eof_body) ->
@@ -798,7 +826,7 @@ request_options_defaults() ->
 		error
 	end,
 
-    VerifyBrackets = VerifyBoolean, 
+    VerifyBrackets = VerifyBoolean,
 
     [
      {sync,                    true,      VerifySync}, 
@@ -869,11 +897,36 @@ request_options_sanity_check(Opts) ->
     end,
     ok.
 
-validate_options(Options) ->
-    (catch validate_options(Options, [])).
-
-validate_options([], ValidateOptions) ->
-    {ok, lists:reverse(ValidateOptions)};
+validate_ipfamily_unix_socket(Options0) ->
+    IpFamily = proplists:get_value(ipfamily, Options0, inet),
+    UnixSocket = proplists:get_value(unix_socket, Options0, undefined),
+    Options1 = proplists:delete(ipfamily, Options0),
+    Options2 = proplists:delete(ipfamily, Options1),
+    validate_ipfamily_unix_socket(IpFamily, UnixSocket, Options2,
+                                  [{ipfamily, IpFamily}, {unix_socket, UnixSocket}]).
+%%
+validate_ipfamily_unix_socket(local, undefined, _Options, _Acc) ->
+    bad_option(unix_socket, undefined);
+validate_ipfamily_unix_socket(IpFamily, UnixSocket, _Options, _Acc)
+  when IpFamily =/= local, UnixSocket =/= undefined ->
+    bad_option(ipfamily, IpFamily);
+validate_ipfamily_unix_socket(IpFamily, UnixSocket, Options, Acc) ->
+    validate_ipfamily(IpFamily),
+    validate_unix_socket(UnixSocket),
+    {Options, Acc}.
+
+
+validate_options(Options0) ->
+    try
+        {Options, Acc} = validate_ipfamily_unix_socket(Options0),
+        validate_options(Options, Acc)
+    catch
+        error:Reason ->
+            {error, Reason}
+    end.
+%%
+validate_options([], ValidOptions) ->
+    {ok, lists:reverse(ValidOptions)};
 
 validate_options([{proxy, Proxy} = Opt| Tail], Acc) ->
     validate_proxy(Proxy),
@@ -933,6 +986,10 @@ validate_options([{verbose, Value} = Opt| Tail], Acc) ->
     validate_verbose(Value), 
     validate_options(Tail, [Opt | Acc]);
 
+validate_options([{unix_socket, Value} = Opt| Tail], Acc) ->
+    validate_unix_socket(Value),
+    validate_options(Tail, [Opt | Acc]);
+
 validate_options([{_, _} = Opt| _], _Acc) ->
     {error, {not_an_option, Opt}}.
 
@@ -1001,7 +1058,8 @@ validate_ipv6(BadValue) ->
     bad_option(ipv6, BadValue).
 
 validate_ipfamily(Value) 
-  when (Value =:= inet) orelse (Value =:= inet6) orelse (Value =:= inet6fb4) ->
+  when (Value =:= inet) orelse (Value =:= inet6) orelse
+       (Value =:= inet6fb4) orelse (Value =:= local) ->
     Value;
 validate_ipfamily(BadValue) ->
     bad_option(ipfamily, BadValue).
@@ -1031,6 +1089,15 @@ validate_verbose(Value)
 validate_verbose(BadValue) ->
     bad_option(verbose, BadValue).
 
+validate_unix_socket(Value)
+  when (Value =:= undefined) ->
+    Value;
+validate_unix_socket(Value)
+  when is_list(Value) andalso length(Value) > 0 ->
+    Value;
+validate_unix_socket(BadValue) ->
+    bad_option(unix_socket, BadValue).
+
 bad_option(Option, BadValue) ->
     throw({error, {bad_option, Option, BadValue}}).
 
@@ -1190,17 +1257,6 @@ validate_headers(RequestHeaders, _, _) ->
 %% These functions is just simple wrappers to parse specifically HTTP URIs
 %%--------------------------------------------------------------------------
 
-scheme_defaults() ->
-    [{http, 80}, {https, 443}].
-
-uri_parse(URI) ->
-    http_uri:parse(URI, [{scheme_defaults, scheme_defaults()}]).
-
-uri_parse(URI, Opts) ->
-    http_uri:parse(URI, [{scheme_defaults, scheme_defaults()} | Opts]).
-
-
-%%--------------------------------------------------------------------------
 header_parse([]) ->
     ok;
 header_parse([{Field, Value}|T]) when is_list(Field), is_list(Value) ->    
@@ -1221,10 +1277,6 @@ child_name(Pid, [{Name, Pid} | _]) ->
 child_name(Pid, [_ | Children]) ->
     child_name(Pid, Children).
 
-host_address(Host, false) ->
-    Host;
-host_address(Host, true) ->
-    string:strip(string:strip(Host, right, $]), left, $[).
 
 check_body_gen({Fun, _}) when is_function(Fun) -> 
     ok;
diff --git a/lib/inets/src/http_client/httpc_handler.erl b/lib/inets/src/http_client/httpc_handler.erl
index bd1d2e833a..9b09832eb8 100644
--- a/lib/inets/src/http_client/httpc_handler.erl
+++ b/lib/inets/src/http_client/httpc_handler.erl
@@ -109,7 +109,7 @@ start_link(Parent, Request, Options, ProfileName) ->
 %% to be called by the httpc manager process.
 %%--------------------------------------------------------------------
 send(Request, Pid) ->
-    call(Request, Pid, 5000).
+    call(Request, Pid).
 
 
 %%--------------------------------------------------------------------
@@ -711,13 +711,17 @@ do_handle_info({'EXIT', _, _}, State = #state{request = undefined}) ->
 %% can retry requests in the pipeline.
 do_handle_info({'EXIT', _, _}, State) ->
     {noreply, State#state{status = close}}.
-    
 
 call(Msg, Pid) ->
-    call(Msg, Pid, infinity).
-
-call(Msg, Pid, Timeout) ->
-    gen_server:call(Pid, Msg, Timeout).
+    try gen_server:call(Pid, Msg, infinity)
+    catch
+ 	exit:{noproc, _} ->
+ 	    {error, closed};
+	exit:{normal, _} ->
+	    {error, closed};
+	exit:{{shutdown, _},_} ->
+	    {error, closed}
+    end.
 
 cast(Msg, Pid) ->
     gen_server:cast(Pid, Msg).
@@ -736,7 +740,7 @@ maybe_send_answer(Request, Answer, State) ->
     answer_request(Request, Answer, State).
 
 deliver_answer(#request{from = From} = Request) 
-  when is_pid(From) ->
+  when From =/= answer_sent ->
     Response = httpc_response:error(Request, socket_closed_remotely),
     httpc_response:send(From, Response);
 deliver_answer(_Request) ->
@@ -750,6 +754,7 @@ connect(SocketType, ToAddress,
         #options{ipfamily    = IpFamily,
                  ip          = FromAddress,
                  port        = FromPort,
+                 unix_socket = UnixSocket,
                  socket_opts = Opts0}, Timeout) ->
     Opts1 = 
         case FromPort of
@@ -785,6 +790,16 @@ connect(SocketType, ToAddress,
                 OK ->
                     OK
             end;
+        local ->
+            Opts3 = [IpFamily | Opts2],
+            SocketAddr = {local, UnixSocket},
+            case http_transport:connect(SocketType, {SocketAddr, 0}, Opts3, Timeout) of
+                {error, Reason} ->
+                    {error, {failed_connect, [{to_address, SocketAddr},
+                                              {IpFamily, Opts3, Reason}]}};
+                Else ->
+                    Else
+            end;
         _ ->
             Opts3 = [IpFamily | Opts2], 
             case http_transport:connect(SocketType, ToAddress, Opts3, Timeout) of
@@ -796,9 +811,23 @@ connect(SocketType, ToAddress,
             end
     end.
 
-connect_and_send_first_request(Address, Request, #state{options = Options} = State) ->
+handle_unix_socket_options(#request{unix_socket = UnixSocket}, Options)
+  when UnixSocket =:= undefined ->
+    Options;
+
+handle_unix_socket_options(#request{unix_socket = UnixSocket},
+                           Options = #options{ipfamily = IpFamily}) ->
+    case IpFamily of
+        local ->
+            Options#options{unix_socket = UnixSocket};
+        Else ->
+            error({badarg, [{ipfamily, Else}, {unix_socket, UnixSocket}]})
+    end.
+
+connect_and_send_first_request(Address, Request, #state{options = Options0} = State) ->
     SocketType  = socket_type(Request),
     ConnTimeout = (Request#request.settings)#http_options.connect_timeout,
+    Options = handle_unix_socket_options(Request, Options0),
     case connect(SocketType, Address, Options, ConnTimeout) of
         {ok, Socket} ->
             ClientClose =
@@ -837,9 +866,10 @@ connect_and_send_first_request(Address, Request, #state{options = Options} = Sta
             {ok, State#state{request = Request}}
     end.
 
-connect_and_send_upgrade_request(Address, Request, #state{options = Options} = State) ->
+connect_and_send_upgrade_request(Address, Request, #state{options = Options0} = State) ->
     ConnTimeout = (Request#request.settings)#http_options.connect_timeout,
     SocketType = ip_comm,
+    Options = handle_unix_socket_options(Request, Options0),
     case connect(SocketType, Address, Options, ConnTimeout) of
         {ok, Socket} ->
 	    SessionType = httpc_manager:session_type(Options),
@@ -1681,9 +1711,8 @@ update_session(ProfileName, #session{id = SessionId} = Session, Pos, Value) ->
 	    insert_session(Session2, ProfileName);
 	error:badarg ->
 	    {stop, normal};
-	T:E -> 
+	T:E:Stacktrace -> 
 	    %% Unexpected this must be an error!  
-            Stacktrace = erlang:get_stacktrace(),
             error_logger:error_msg("Failed updating session: "
                                    "~n   ProfileName: ~p"
                                    "~n   SessionId:   ~p"
diff --git a/lib/inets/src/http_client/httpc_internal.hrl b/lib/inets/src/http_client/httpc_internal.hrl
index 5f8c70f28d..c5fe439722 100644
--- a/lib/inets/src/http_client/httpc_internal.hrl
+++ b/lib/inets/src/http_client/httpc_internal.hrl
@@ -83,10 +83,11 @@
 	 max_sessions          = ?HTTP_MAX_TCP_SESSIONS,
 	 cookies               = disabled, % enabled | disabled | verify
 	 verbose               = false,   % boolean(),
-	 ipfamily              = inet,    % inet | inet6 | inet6fb4
+	 ipfamily              = inet,    % inet | inet6 | inet6fb4 | local
 	 ip                    = default, % specify local interface
 	 port                  = default, % specify local port
-	 socket_opts           = []       % other socket options
+	 socket_opts           = [],      % other socket options
+	 unix_socket           = undefined % Local unix socket
 	}
        ).
 -type options() :: #options{}.
@@ -115,6 +116,7 @@
 			 % request
 	  timer         :: undefined | reference(),
 	  socket_opts,   % undefined | [socket_option()]
+	  unix_socket,   % undefined | string()
 	  ipv6_host_with_brackets % boolean()
 	}
        ).
diff --git a/lib/inets/src/http_client/httpc_manager.erl b/lib/inets/src/http_client/httpc_manager.erl
index a63864493f..7b8d7875de 100644
--- a/lib/inets/src/http_client/httpc_manager.erl
+++ b/lib/inets/src/http_client/httpc_manager.erl
@@ -553,7 +553,8 @@ handle_cast({set_options, Options}, State = #state{options = OldOptions}) ->
 		 ip                    = get_ip(Options, OldOptions),
 		 port                  = get_port(Options, OldOptions),
 		 verbose               = get_verbose(Options, OldOptions),
-		 socket_opts           = get_socket_opts(Options, OldOptions)
+		 socket_opts           = get_socket_opts(Options, OldOptions),
+		 unix_socket           = get_unix_socket_opts(Options, OldOptions)
 		}, 
     case {OldOptions#options.verbose, NewOptions#options.verbose} of
 	{Same, Same} ->
@@ -849,11 +850,11 @@ pipeline_or_keep_alive(#request{id   = Id,
 				from = From} = Request, 
 		       HandlerPid, 
 		       #state{handler_db = HandlerDb} = State) ->
-    case (catch httpc_handler:send(Request, HandlerPid)) of
+    case httpc_handler:send(Request, HandlerPid) of
 	ok ->
 	    HandlerInfo = {Id, HandlerPid, From}, 
 	    ets:insert(HandlerDb, HandlerInfo);
-	_  -> % timeout pipelining failed
+	{error, closed}  -> % timeout pipelining failed
 	    start_handler(Request, State)
     end.
 
@@ -963,7 +964,10 @@ get_option(ip, #options{ip = IP}) ->
 get_option(port, #options{port = Port}) ->
     Port;
 get_option(socket_opts, #options{socket_opts = SocketOpts}) ->
-    SocketOpts.
+    SocketOpts;
+get_option(unix_socket, #options{unix_socket = UnixSocket}) ->
+    UnixSocket.
+
 
 get_proxy(Opts, #options{proxy = Default}) ->
     proplists:get_value(proxy, Opts, Default).
@@ -1016,6 +1020,8 @@ get_verbose(Opts, #options{verbose = Default}) ->
 get_socket_opts(Opts, #options{socket_opts = Default}) ->
     proplists:get_value(socket_opts, Opts, Default).
 
+get_unix_socket_opts(Opts, #options{unix_socket = Default}) ->
+    proplists:get_value(unix_socket, Opts, Default).
 
 handle_verbose(debug) ->
     dbg:p(self(), [call]),
diff --git a/lib/inets/src/http_client/httpc_response.erl b/lib/inets/src/http_client/httpc_response.erl
index b3b11b74ab..58ab9144df 100644
--- a/lib/inets/src/http_client/httpc_response.erl
+++ b/lib/inets/src/http_client/httpc_response.erl
@@ -190,7 +190,7 @@ parse_status_code(<<?CR, ?LF, Rest/binary>>, StatusCodeStr,
 		  MaxHeaderSize, Result, true) ->
     parse_headers(Rest, [], [], MaxHeaderSize,
  		  [" ", list_to_integer(lists:reverse(
-				     string:strip(StatusCodeStr))) 
+                                          string:trim(StatusCodeStr)))
 		   | Result], true); 
 
 parse_status_code(<<?SP, Rest/binary>>, StatusCodeStr, 
@@ -269,7 +269,7 @@ parse_headers(<<?LF,?LF,Body/binary>>, Header, Headers,
 		  MaxHeaderSize, Result, Relaxed);
 
 parse_headers(<<?CR,?LF,?CR,?LF,Body/binary>>, Header, Headers,
-	      MaxHeaderSize, Result, _) ->
+	      MaxHeaderSize, Result, Relaxed) ->
     HTTPHeaders = [lists:reverse(Header) | Headers],
     Length = lists:foldl(fun(H, Acc) -> length(H) + Acc end,
 			   0, HTTPHeaders),
@@ -277,8 +277,42 @@ parse_headers(<<?CR,?LF,?CR,?LF,Body/binary>>, Header, Headers,
  	true ->   
 	    ResponseHeaderRcord = 
 		http_response:headers(HTTPHeaders, #http_response_h{}),
-	    {ok, list_to_tuple(
-		   lists:reverse([Body, ResponseHeaderRcord | Result]))};
+
+            %% RFC7230, Section 3.3.3
+            %% If a message is received with both a Transfer-Encoding and a
+            %% Content-Length header field, the Transfer-Encoding overrides the
+            %% Content-Length. Such a message might indicate an attempt to
+            %% perform request smuggling (Section 9.5) or response splitting
+            %% (Section 9.4) and ought to be handled as an error. A sender MUST
+            %% remove the received Content-Length field prior to forwarding such
+            %% a message downstream.
+            case ResponseHeaderRcord#http_response_h.'transfer-encoding' of
+                undefined ->
+                    {ok, list_to_tuple(
+                           lists:reverse([Body, ResponseHeaderRcord | Result]))};
+                Value ->
+                    TransferEncoding = string:lowercase(Value),
+                    ContentLength = ResponseHeaderRcord#http_response_h.'content-length',
+                    if
+                        %% Respond without error but remove Content-Length field in relaxed mode
+                        (Relaxed =:= true)
+                        andalso (TransferEncoding =:= "chunked")
+                        andalso (ContentLength =/= "-1") ->
+                            ResponseHeaderRcordFixed =
+                                ResponseHeaderRcord#http_response_h{'content-length' = "-1"},
+                            {ok, list_to_tuple(
+                                   lists:reverse([Body, ResponseHeaderRcordFixed | Result]))};
+                        %% Respond with error in default (not relaxed) mode
+                        (Relaxed =:= false)
+                        andalso (TransferEncoding =:= "chunked")
+                        andalso (ContentLength =/= "-1") ->
+                            throw({error, {headers_conflict, {'content-length',
+                                                              'transfer-encoding'}}});
+                        true  ->
+                            {ok, list_to_tuple(
+                                   lists:reverse([Body, ResponseHeaderRcord | Result]))}
+                    end
+            end;
  	false ->
 	    throw({error, {header_too_long, MaxHeaderSize, 
 			   MaxHeaderSize-Length}})
@@ -343,58 +377,173 @@ status_server_error_50x(Response, Request) ->
     {stop, {Request#request.id, Msg}}.
 
 
-redirect(Response = {StatusLine, Headers, Body}, Request) ->
+redirect(Response = {_, Headers, _}, Request) ->
     {_, Data} =  format_response(Response),
     case Headers#http_response_h.location of
-	undefined ->
-	    transparent(Response, Request);
-	RedirUrl ->
-	    UrlParseOpts = [{ipv6_host_with_brackets, 
-			     Request#request.ipv6_host_with_brackets}], 
-	    case uri_parse(RedirUrl, UrlParseOpts) of
-		{error, no_scheme} when
-		(Request#request.settings)#http_options.relaxed ->
-		    NewLocation = fix_relative_uri(Request, RedirUrl),
-		    redirect({StatusLine, Headers#http_response_h{
-					    location = NewLocation},
-			      Body}, Request);
-		{error, Reason} ->
-		    {ok, error(Request, Reason), Data};
-		%% Automatic redirection
-		{ok, {Scheme, _, Host, Port, Path,  Query}} -> 
-		    HostPort = http_request:normalize_host(Scheme, Host, Port),
-		    NewHeaders = 
-			(Request#request.headers)#http_request_h{host = HostPort},
-		    NewRequest = 
-			Request#request{redircount = 
-					Request#request.redircount+1,
-					scheme = Scheme,
-					headers = NewHeaders,
-					address = {Host,Port},
-					path = Path,
-					pquery = Query,
-					abs_uri =
-					atom_to_list(Scheme) ++ "://" ++
-                                        Host ++ ":" ++ 
-					integer_to_list(Port) ++
-					Path ++ Query},
-		    {redirect, NewRequest, Data}
-	    end
+        undefined ->
+            transparent(Response, Request);
+        RedirUrl ->
+            Brackets = Request#request.ipv6_host_with_brackets,
+            case uri_string:parse(RedirUrl) of
+                {error, Reason, _} ->
+                    {ok, error(Request, Reason), Data};
+                %% Automatic redirection
+                URI ->
+                    {Host, Port0} = Request#request.address,
+                    Port = maybe_to_integer(Port0),
+                    Path = Request#request.path,
+                    Scheme = atom_to_list(Request#request.scheme),
+                    Query = Request#request.pquery,
+                    URIMap = resolve_uri(Scheme, Host, Port, Path, Query, URI),
+                    TScheme = list_to_atom(maps:get(scheme, URIMap)),
+                    THost = http_util:maybe_add_brackets(maps:get(host, URIMap), Brackets),
+                    TPort = maps:get(port, URIMap),
+                    TPath = maps:get(path, URIMap),
+                    TQuery = maps:get(query, URIMap, ""),
+                    NewURI = uri_string:normalize(
+                               uri_string:recompose(URIMap)),
+                    HostPort = http_request:normalize_host(TScheme, THost, TPort),
+                    NewHeaders =
+                        (Request#request.headers)#http_request_h{host = HostPort},
+                    NewRequest =
+                        Request#request{redircount =
+                                            Request#request.redircount+1,
+                                        scheme = TScheme,
+                                        headers = NewHeaders,
+                                        address = {THost,TPort},
+                                        path = TPath,
+                                        pquery = TQuery,
+                                        abs_uri = NewURI},
+                    {redirect, NewRequest, Data}
+            end
+    end.
+
+
+%% RFC3986 - 5.2.2.  Transform References
+resolve_uri(Scheme, Host, Port, Path, Query, URI) ->
+    resolve_uri(Scheme, Host, Port, Path, Query, URI, #{}).
+%%
+resolve_uri(Scheme, Host, Port, Path, Query, URI, Map0) ->
+    case maps:is_key(scheme, URI) of
+        true ->
+            Port = get_port(URI),
+            maybe_add_query(
+              Map0#{scheme => maps:get(scheme, URI),
+                   host => maps:get(host, URI),
+                   port => Port,
+                   path => maps:get(path, URI)},
+              URI);
+        false ->
+            Map = Map0#{scheme => Scheme},
+            resolve_authority(Host, Port, Path, Query, URI, Map)
+    end.
+
+
+get_port(URI) ->
+    Scheme = maps:get(scheme, URI),
+    case maps:get(port, URI, undefined) of
+        undefined ->
+            get_default_port(Scheme);
+        Port ->
+            Port
+    end.
+
+
+get_default_port("http") ->
+    80;
+get_default_port("https") ->
+    443.
+
+
+resolve_authority(Host, Port, Path, Query, RelURI, Map) ->
+    case maps:is_key(host, RelURI) of
+        true ->
+            Port = get_port(RelURI),
+            maybe_add_query(
+              Map#{host => maps:get(host, RelURI),
+                   port => Port,
+                   path => maps:get(path, RelURI)},
+              RelURI);
+        false ->
+            Map1 = Map#{host => Host,
+                    port => Port},
+            resolve_path(Path, Query, RelURI, Map1)
+    end.
+
+
+maybe_add_query(Map, RelURI) ->
+     case maps:is_key(query, RelURI) of
+         true ->
+             Map#{query => maps:get(query, RelURI)};
+         false ->
+             Map
+         end.
+
+
+resolve_path(Path, Query, RelURI, Map) ->
+    case maps:is_key(path, RelURI) of
+        true ->
+            Path1 = calculate_path(Path,  maps:get(path, RelURI)),
+            maybe_add_query(
+              Map#{path => Path1},
+              RelURI);
+        false ->
+            Map1 = Map#{path => Path},
+            resolve_query(Query, RelURI, Map1)
+    end.
+
+
+calculate_path(BaseP, RelP) ->
+    case starts_with_slash(RelP) of
+        true ->
+            RelP;
+        false ->
+            merge_paths(BaseP, RelP)
     end.
 
-maybe_to_list(Port) when is_integer(Port) ->
-    integer_to_list(Port);
-maybe_to_list(Port) when is_list(Port) ->
+
+starts_with_slash([$/|_]) ->
+    true;
+starts_with_slash(<<$/,_/binary>>) ->
+    true;
+starts_with_slash(_) ->
+    false.
+
+
+%% RFC3986 - 5.2.3.  Merge Paths
+merge_paths("", RelP) ->
+    [$/|RelP];
+merge_paths(BaseP, RelP) when is_list(BaseP) ->
+    do_merge_paths(lists:reverse(BaseP), RelP);
+merge_paths(BaseP, RelP) when is_binary(BaseP) ->
+    B = binary_to_list(BaseP),
+    R = binary_to_list(RelP),
+    Res = merge_paths(B, R),
+    list_to_binary(Res).
+
+
+do_merge_paths([$/|_] = L, RelP) ->
+    lists:reverse(L) ++ RelP;
+do_merge_paths([_|T], RelP) ->
+    do_merge_paths(T, RelP).
+
+
+resolve_query(Query, RelURI, Map) ->
+    case maps:is_key(query, RelURI) of
+        true ->
+            Map#{query => maps:get(query, RelURI)};
+        false ->
+            Map#{query => Query}
+    end.
+
+
+maybe_to_integer(Port) when is_list(Port) ->
+    {Port1, _} = string:to_integer(Port),
+    Port1;
+maybe_to_integer(Port) when is_integer(Port) ->
     Port.
 
-%%% Guessing that we received a relative URI, fix it to become an absoluteURI
-fix_relative_uri(Request, RedirUrl) ->
-    {Server, Port0} = Request#request.address,
-    Port = maybe_to_list(Port0),
-    Path = Request#request.path,
-    atom_to_list(Request#request.scheme) ++ "://" ++ Server ++ ":" ++ Port
-	++ Path ++ RedirUrl.
-    
+
 error(#request{id = Id}, Reason) ->
     {Id, {error, Reason}}.
 
@@ -444,18 +593,3 @@ format_response({StatusLine, Headers, Body}) ->
 		{Body, <<>>}
 	end,
     {{StatusLine, http_response:header_list(Headers), NewBody}, Data}.
-
-%%--------------------------------------------------------------------------
-%% These functions is just simple wrappers to parse specifically HTTP URIs
-%%--------------------------------------------------------------------------
-
-scheme_defaults() ->
-    [{http, 80}, {https, 443}].
-
-uri_parse(URI, Opts) ->
-    http_uri:parse(URI, [{scheme_defaults, scheme_defaults()} | Opts]).
-
-
-%%--------------------------------------------------------------------------
-
-
diff --git a/lib/inets/src/http_lib/http_uri.erl b/lib/inets/src/http_lib/http_uri.erl
index 7f1ca02014..bc588fd390 100644
--- a/lib/inets/src/http_lib/http_uri.erl
+++ b/lib/inets/src/http_lib/http_uri.erl
@@ -61,19 +61,35 @@
 	 scheme_defaults/0, 
 	 encode/1, decode/1]).
 
--export_type([scheme/0, default_scheme_port_number/0]).
+-export_type([uri/0,
+              user_info/0,
+              scheme/0, default_scheme_port_number/0,
+              host/0,
+              path/0,
+              query/0,
+              fragment/0]).
 
+-type uri() :: string() | binary().
+-type user_info() :: string() | binary().
+-type scheme() :: atom().
+-type host() :: string() | binary().
+-type path() :: string() | binary().
+-type query() :: string() | binary().
+-type fragment() :: string() | binary().
+-type port_number() :: inet:port_number().
+-type default_scheme_port_number() :: port_number().
+-type hex_uri() :: string() | binary(). %% Hexadecimal encoded URI.
+-type maybe_hex_uri() :: string() | binary(). %% A possibly hexadecimal encoded URI.
+
+-type scheme_defaults() :: [{scheme(), default_scheme_port_number()}].
+-type scheme_validation_fun() :: fun((SchemeStr :: string() | binary()) ->
+                                            valid | {error, Reason :: term()}).
 
 %%%=========================================================================
 %%%  API
 %%%=========================================================================
 
--type scheme() :: atom().
--type default_scheme_port_number() :: pos_integer().
-
--spec scheme_defaults() ->
-    [{scheme(), default_scheme_port_number()}].
-
+-spec scheme_defaults() -> scheme_defaults().
 scheme_defaults() ->
     [{http,  80}, 
      {https, 443}, 
@@ -82,9 +98,20 @@ scheme_defaults() ->
      {sftp,  22}, 
      {tftp,  69}].
 
+-type parse_result() ::
+        {scheme(), user_info(), host(), port_number(), path(), query()} |
+        {scheme(), user_info(), host(), port_number(), path(), query(),
+         fragment()}.
+
+-spec parse(uri()) -> {ok, parse_result()} | {error, term()}.
 parse(AbsURI) ->
     parse(AbsURI, []).
 
+-spec parse(uri(), [Option]) -> {ok, parse_result()} | {error, term()} when
+      Option :: {ipv6_host_with_brackets, boolean()} |
+                {scheme_defaults, scheme_defaults()} |
+                {fragment, boolean()} |
+                {scheme_validation_fun, scheme_validation_fun() | none}.
 parse(AbsURI, Opts) ->
     case parse_scheme(AbsURI, Opts) of
 	{error, Reason} ->
@@ -105,6 +132,7 @@ reserved() ->
             $#, $[, $], $<, $>, $\", ${, $}, $|, %"
 			       $\\, $', $^, $%, $ ]).
 
+-spec encode(uri()) -> hex_uri().
 encode(URI) when is_list(URI) ->
     Reserved = reserved(), 
     lists:append([uri_encode(Char, Reserved) || Char <- URI]);
@@ -112,6 +140,7 @@ encode(URI) when is_binary(URI) ->
     Reserved = reserved(),
     << <<(uri_encode_binary(Char, Reserved))/binary>> || <<Char>> <= URI >>.
 
+-spec decode(maybe_hex_uri()) -> uri().
 decode(String) when is_list(String) ->
     do_decode(String);
 decode(String) when is_binary(String) ->
@@ -168,7 +197,7 @@ extract_scheme(Str, Opts) ->
 	{value, {scheme_validation_fun, Fun}} when is_function(Fun) ->
 	    case Fun(Str) of
 		valid ->
-		    {ok, list_to_atom(http_util:to_lower(Str))};
+		    {ok, to_atom(http_util:to_lower(Str))};
 		{error, Error} ->
 		    {error, Error}
 	    end;
diff --git a/lib/inets/src/http_lib/http_util.erl b/lib/inets/src/http_lib/http_util.erl
index 487d04f7aa..5577b00cc8 100644
--- a/lib/inets/src/http_lib/http_util.erl
+++ b/lib/inets/src/http_lib/http_util.erl
@@ -27,7 +27,8 @@
 	 convert_month/1, 
 	 is_hostname/1,
 	 timestamp/0, timeout/2,
-	 html_encode/1
+	 html_encode/1,
+	 maybe_add_brackets/2
 	]).
 
 
@@ -194,6 +195,24 @@ html_encode(Chars) ->
     lists:append([char_to_html_entity(Char, Reserved) || Char <- Chars]).
 
 
+maybe_add_brackets(Addr, false) ->
+    Addr;
+maybe_add_brackets(Addr, true) when is_list(Addr) ->
+    case is_ipv6_address(Addr) of
+        true ->
+            [$[|Addr] ++ "]";
+        false ->
+            Addr
+    end;
+maybe_add_brackets(Addr, true) when is_binary(Addr) ->
+    case is_ipv6_address(Addr) of
+        true ->
+            <<$[,Addr/binary,$]>>;
+        false ->
+            Addr
+    end.
+
+
 %%%========================================================================
 %%% Internal functions
 %%%========================================================================
@@ -205,3 +224,14 @@ char_to_html_entity(Char, Reserved) ->
 	false ->
 	    [Char]
     end.
+
+is_ipv6_address(Addr) when is_binary(Addr) ->
+    B = binary_to_list(Addr),
+    is_ipv6_address(B);
+is_ipv6_address(Addr) when is_list(Addr) ->
+    case inet:parse_ipv6strict_address(Addr) of
+        {ok, _ } ->
+            true;
+        {error, _} ->
+            false
+    end.
diff --git a/lib/inets/src/http_server/httpd.erl b/lib/inets/src/http_server/httpd.erl
index 0b632d24e3..540e68e749 100644
--- a/lib/inets/src/http_server/httpd.erl
+++ b/lib/inets/src/http_server/httpd.erl
@@ -99,7 +99,14 @@ start_service(Conf) ->
 stop_service({Address, Port}) ->
     stop_service({Address, Port, ?DEFAULT_PROFILE});
 stop_service({Address, Port, Profile}) ->
-     httpd_sup:stop_child(Address, Port, Profile);
+    Name  = httpd_util:make_name("httpd_instance_sup", Address, Port, Profile),
+    Pid = whereis(Name),
+    MonitorRef = erlang:monitor(process, Pid),
+    Result = httpd_sup:stop_child(Address, Port, Profile),
+    receive
+        {'DOWN', MonitorRef, _, _, _} ->
+            Result
+    end;     
 stop_service(Pid) when is_pid(Pid) ->
     case service_info(Pid)  of
 	{ok, Info} ->	   
diff --git a/lib/inets/src/http_server/httpd_esi.erl b/lib/inets/src/http_server/httpd_esi.erl
index 9406b47802..f5493f6fad 100644
--- a/lib/inets/src/http_server/httpd_esi.erl
+++ b/lib/inets/src/http_server/httpd_esi.erl
@@ -66,7 +66,7 @@ handle_headers("") ->
     {ok, [], 200};
 handle_headers(Headers) ->
     NewHeaders = string:tokens(Headers, ?CRLF),
-    handle_headers(NewHeaders, [], 200).
+    handle_headers(NewHeaders, [], 200, true).
 
 %%%========================================================================
 %%% Internal functions
@@ -80,21 +80,17 @@ parse_headers([?CR, ?LF, ?CR, ?LF | Rest], Acc) ->
 parse_headers([Char | Rest], Acc) ->
     parse_headers(Rest, [Char | Acc]).
  
-handle_headers([], NewHeaders, StatusCode) ->
+handle_headers([], NewHeaders, StatusCode, _) ->
     {ok, NewHeaders, StatusCode};
 
-handle_headers([Header | Headers], NewHeaders, StatusCode) -> 
+handle_headers([Header | Headers], NewHeaders, StatusCode, NoESIStatus) -> 
     {FieldName, FieldValue} = httpd_response:split_header(Header, []),
     case FieldName of
-	"location" ->
-	    case http_request:is_absolut_uri(FieldValue) of
-		true ->
-		    handle_headers(Headers, 
-				   [{FieldName, FieldValue} | NewHeaders], 
-				   302);
-		false ->
-		    {proceed, FieldValue}
-	    end;
+	"location" when NoESIStatus == true ->
+            handle_headers(Headers, 
+                           [{FieldName, FieldValue} | NewHeaders], 
+                           302, NoESIStatus);
+	
 	"status" ->
 	    NewStatusCode = 
 		case httpd_util:split(FieldValue," ",2) of
@@ -103,8 +99,9 @@ handle_headers([Header | Headers], NewHeaders, StatusCode) ->
 		    _ ->
 			200
 		end,
-	    handle_headers(Headers, NewHeaders, NewStatusCode);
+	    handle_headers(Headers, NewHeaders, NewStatusCode, false);
 	_ -> 
 	    handle_headers(Headers, 
-			     [{FieldName, FieldValue}| NewHeaders], StatusCode)
-    end.	
+                           [{FieldName, FieldValue}| NewHeaders], StatusCode,
+                           NoESIStatus)
+    end.	 
diff --git a/lib/inets/src/http_server/httpd_example.erl b/lib/inets/src/http_server/httpd_example.erl
index 45b6deba97..47a8c48d01 100644
--- a/lib/inets/src/http_server/httpd_example.erl
+++ b/lib/inets/src/http_server/httpd_example.erl
@@ -20,7 +20,7 @@
 %%
 -module(httpd_example).
 -export([print/1]).
--export([get/2, put/2, post/2, yahoo/2, test1/2, get_bin/2, peer/2]).
+-export([get/2, put/2, post/2, yahoo/2, test1/2, get_bin/2, peer/2,new_status_and_location/2]).
 
 -export([newformat/3, post_chunked/3]).
 %% These are used by the inets test-suite
@@ -90,6 +90,9 @@ post(Env,Input) ->
 yahoo(_Env,_Input) ->
   "Location: http://www.yahoo.com\r\n\r\n".
 
+new_status_and_location(_Env,_Input) ->
+  "status:201 Created\r\n Location: http://www.yahoo.com\r\n\r\n".
+
 default(Env,Input) ->
   [header(),
    top("Default Example"),
diff --git a/lib/inets/src/http_server/httpd_request.erl b/lib/inets/src/http_server/httpd_request.erl
index 0eaf073255..007d272323 100644
--- a/lib/inets/src/http_server/httpd_request.erl
+++ b/lib/inets/src/http_server/httpd_request.erl
@@ -306,10 +306,10 @@ add_chunk([<<>>, Body, Length, MaxChunk]) ->
 add_chunk([More, Body, Length, MaxChunk]) ->
     body_chunk(<<Body/binary, More/binary>>, Length, MaxChunk).
 
-body_chunk(<<>> = Body, Length, MaxChunk) ->
-    {ok, {continue, ?MODULE, add_chunk, [Body, Length, MaxChunk]}};
 body_chunk(Body, Length, nolimit) ->
     whole_body(Body, Length); 
+body_chunk(<<>> = Body, Length, MaxChunk) ->
+    {ok, {continue, ?MODULE, add_chunk, [Body, Length, MaxChunk]}};
 
 body_chunk(Body, Length, MaxChunk) when Length > MaxChunk ->
     case size(Body) >= MaxChunk of 
diff --git a/lib/inets/src/http_server/httpd_request_handler.erl b/lib/inets/src/http_server/httpd_request_handler.erl
index bd4fdd3832..d918f10424 100644
--- a/lib/inets/src/http_server/httpd_request_handler.erl
+++ b/lib/inets/src/http_server/httpd_request_handler.erl
@@ -516,6 +516,15 @@ handle_body(#state{headers = Headers, body = Body,
 	    case ((Length =< MaxBodySize) or (MaxBodySize == nolimit)) of
 		true ->
 		    case httpd_request:body_chunk_first(Body, Length, MaxChunk) of 
+                        %% This is the case that the we need more data to complete
+                        %% the body but chunking to the mod_esi user is not enabled.
+                        {Module, add_chunk = Function,  Args} ->  
+                            http_transport:setopts(ModData#mod.socket_type, 
+						   ModData#mod.socket, 
+						   [{active, once}]),
+			    {noreply, State#state{mfa = 
+						      {Module, Function, Args}}};
+                        %% Chunking to mod_esi user is enabled
                         {ok, {continue, Module, Function, Args}} ->
                                 http_transport:setopts(ModData#mod.socket_type, 
 						   ModData#mod.socket, 
@@ -525,6 +534,8 @@ handle_body(#state{headers = Headers, body = Body,
                         {ok, {{continue, Chunk}, Module, Function, Args}} ->
                             handle_internal_chunk(State#state{chunk =  chunk_start(MaxChunk), 
                                                               body = Chunk}, Module, Function, Args);                   
+                        %% Whole body delivered, if chunking mechanism is enabled the whole
+                        %% body fits in one chunk.
                         {ok, NewBody} ->
                             handle_response(State#state{chunk = chunk_finish(ChunkState, 
                                                                              CbState, MaxChunk),
diff --git a/lib/inets/src/http_server/httpd_response.erl b/lib/inets/src/http_server/httpd_response.erl
index 6b9053fda6..57ce162922 100644
--- a/lib/inets/src/http_server/httpd_response.erl
+++ b/lib/inets/src/http_server/httpd_response.erl
@@ -84,14 +84,14 @@ traverse_modules(ModData,[Module|Rest]) ->
 	{proceed, NewData} ->
             traverse_modules(ModData#mod{data = NewData}, Rest)
     catch 
-	T:E ->
+	T:E:Stacktrace ->
 	    String = 
 		lists:flatten(
 		  io_lib:format("module traverse failed: ~p:do => "
 				"~n   Error Type:  ~p"
 				"~n   Error:       ~p"
 				"~n   Stack trace: ~p",
-				[Module, T, E, ?STACK()])),
+				[Module, T, E, Stacktrace])),
 	    httpd_util:error_log(ModData#mod.config_db, String),
 	    send_status(ModData, 500, none),
 	    done
diff --git a/lib/inets/src/http_server/mod_esi.erl b/lib/inets/src/http_server/mod_esi.erl
index 3a589ca5f0..3206d957d9 100644
--- a/lib/inets/src/http_server/mod_esi.erl
+++ b/lib/inets/src/http_server/mod_esi.erl
@@ -339,26 +339,21 @@ erl_scheme_webpage_whole(Mod, Func, Env, Input, ModData) ->
 	    {Headers, Body} = 
 		httpd_esi:parse_headers(lists:flatten(Response)),
 	    Length =  httpd_util:flatlength(Body),
-	    case httpd_esi:handle_headers(Headers) of
-		{proceed, AbsPath} ->
-		    {proceed, [{real_name, httpd_util:split_path(AbsPath)} 
-			       | ModData#mod.data]};
-		{ok, NewHeaders, StatusCode} ->
-		    send_headers(ModData, StatusCode, 
-				 [{"content-length", 
-				   integer_to_list(Length)}| NewHeaders]),
-		    case ModData#mod.method of
-			"HEAD" ->
-			    {proceed, [{response, {already_sent, 200, 0}} | 
-				       ModData#mod.data]};
-			_ ->
-			    httpd_response:send_body(ModData, 
-						     StatusCode, Body),
-			    {proceed, [{response, {already_sent, 200, 
-						  Length}} | 
-				       ModData#mod.data]}
-		    end
-	    end
+            {ok, NewHeaders, StatusCode} = httpd_esi:handle_headers(Headers), 
+            send_headers(ModData, StatusCode, 
+                         [{"content-length", 
+                           integer_to_list(Length)}| NewHeaders]),
+            case ModData#mod.method of
+                "HEAD" ->
+                    {proceed, [{response, {already_sent, 200, 0}} | 
+                               ModData#mod.data]};
+                _ ->
+                    httpd_response:send_body(ModData, 
+                                             StatusCode, Body),
+                    {proceed, [{response, {already_sent, 200, 
+                                           Length}} | 
+                               ModData#mod.data]}
+            end
     end.
 
 %% New API that allows the dynamic wepage to be sent back to the client 
@@ -398,29 +393,23 @@ deliver_webpage_chunk(#mod{config_db = Db} = ModData, Pid, Timeout) ->
         {continue, _} = Continue ->
             Continue;
 	{Headers, Body} ->
-	    case httpd_esi:handle_headers(Headers) of
-		{proceed, AbsPath} ->
-		    {proceed, [{real_name, httpd_util:split_path(AbsPath)} 
-			       | ModData#mod.data]};
-		{ok, NewHeaders, StatusCode} ->
-		    IsDisableChunkedSend = 
-			httpd_response:is_disable_chunked_send(Db),
-		    case (ModData#mod.http_version =/= "HTTP/1.1") or
-			(IsDisableChunkedSend) of
-			true ->
-			    send_headers(ModData, StatusCode, 
-					 [{"connection", "close"} | 
-					  NewHeaders]);
-			false ->
-			    send_headers(ModData, StatusCode, 
-					 [{"transfer-encoding", 
-					   "chunked"} | NewHeaders])
-		    end,    
-		    handle_body(Pid, ModData, Body, Timeout, length(Body), 
-				IsDisableChunkedSend)
-	    end;
-	timeout ->
-	    send_headers(ModData, 504, [{"connection", "close"}]),
+            {ok, NewHeaders, StatusCode} = httpd_esi:handle_headers(Headers),
+                IsDisableChunkedSend = httpd_response:is_disable_chunked_send(Db),
+            case (ModData#mod.http_version =/= "HTTP/1.1") or
+                (IsDisableChunkedSend) of
+                true ->
+                    send_headers(ModData, StatusCode, 
+                                 [{"connection", "close"} | 
+                                  NewHeaders]);
+                false ->
+                    send_headers(ModData, StatusCode, 
+                                 [{"transfer-encoding", 
+                                   "chunked"} | NewHeaders])
+            end,    
+            handle_body(Pid, ModData, Body, Timeout, length(Body), 
+                        IsDisableChunkedSend);
+        timeout ->
+            send_headers(ModData, 504, [{"connection", "close"}]),
 	    httpd_socket:close(ModData#mod.socket_type, ModData#mod.socket),
 	    {proceed,[{response, {already_sent, 200, 0}} | ModData#mod.data]}
     end.
@@ -560,15 +549,10 @@ eval(#mod{method = Method} = ModData, ESIBody, Modules)
 		{ok, Response} ->
 		    {Headers, _} = 
 			httpd_esi:parse_headers(lists:flatten(Response)),
-		    case httpd_esi:handle_headers(Headers) of
-			{ok, _, StatusCode} ->
-			    {proceed,[{response, {StatusCode, Response}} | 
-				      ModData#mod.data]};
-			{proceed, AbsPath} ->
-			    {proceed, [{real_name, AbsPath} | 
-				       ModData#mod.data]}
-		    end
-	    end;
+                    {ok, _, StatusCode} =httpd_esi:handle_headers(Headers), 
+                    {proceed,[{response, {StatusCode, Response}} | 
+                              ModData#mod.data]}
+            end;
 	false ->
 	    {proceed,[{status,
 		       {403, ModData#mod.request_uri,
diff --git a/lib/inets/src/inets_app/inets_internal.hrl b/lib/inets/src/inets_app/inets_internal.hrl
index 079b415b56..e0f59bba5f 100644
--- a/lib/inets/src/inets_app/inets_internal.hrl
+++ b/lib/inets/src/inets_app/inets_internal.hrl
@@ -22,8 +22,6 @@
 -ifndef(inets_internal_hrl).
 -define(inets_internal_hrl, true).
 
--define(STACK(), erlang:get_stacktrace()).
-
 %% Various trace macros
 
 -define(report(Severity, Label, Service, Content), 
diff --git a/lib/inets/test/Makefile b/lib/inets/test/Makefile
index ffc512050a..99a7e6a9db 100644
--- a/lib/inets/test/Makefile
+++ b/lib/inets/test/Makefile
@@ -150,6 +150,7 @@ INETS_ROOT = ../../inets
 MODULES =                 		\
 	inets_test_lib    		\
 	erl_make_certs                  \
+	make_certs                      \
 	ftp_SUITE 	  		\
 	ftp_format_SUITE  		\
 	http_format_SUITE 		\
@@ -157,10 +158,10 @@ MODULES =                 		\
 	httpc_cookie_SUITE		\
 	httpc_proxy_SUITE		\
 	httpd_SUITE       		\
-	old_httpd_SUITE       		\
+	httpd_bench_SUITE               \
+	http_test_lib    		\
 	httpd_basic_SUITE		\
 	httpd_mod 	  		\
-	httpd_block	  		\
 	httpd_load        		\
 	httpd_time_test	  		\
 	httpd_1_1         		\
@@ -189,7 +190,7 @@ SOURCE = $(ERL_FILES) $(HRL_FILES)
 
 TARGET_FILES = $(MODULES:%=$(EBIN)/%.$(EMULATOR))
 
-INETS_SPECS = inets.spec
+INETS_SPECS = inets.spec inets_bench.spec
 COVER_FILE = inets.cover
 INETS_FILES = inets.config $(INETS_SPECS)
 
@@ -200,8 +201,10 @@ INETS_FILES = inets.config $(INETS_SPECS)
 # 	inets_ftp_suite \
 # 	inets_tftp_suite
 
+
 INETS_DATADIRS = inets_SUITE_data inets_socketwrap_SUITE_data
-HTTPD_DATADIRS = httpd_test_data httpd_SUITE_data httpd_basic_SUITE_data old_httpd_SUITE_data
+HTTPD_DATADIRS = httpd_test_data httpd_SUITE_data httpd_basic_SUITE_data old_httpd_SUITE_data httpd_bench_SUITE_data
+
 HTTPC_DATADIRS = httpc_SUITE_data httpc_proxy_SUITE_data
 FTP_DATADIRS   = ftp_SUITE_data  
 
diff --git a/lib/inets/test/http_format_SUITE.erl b/lib/inets/test/http_format_SUITE.erl
index 4e10a97f58..647eff4f7c 100644
--- a/lib/inets/test/http_format_SUITE.erl
+++ b/lib/inets/test/http_format_SUITE.erl
@@ -535,8 +535,11 @@ esi_parse_headers(Config) when is_list(Config) ->
 	 {"location","http://foo.bar.se"}], 302} =
 	httpd_esi:handle_headers(Headers2),
     
-    {proceed,"/foo/bar.html"} = 
-	httpd_esi:handle_headers("location:/foo/bar.html\r\n").
+   {ok,[{"location","/foo/bar.html"}], 302} = 
+	httpd_esi:handle_headers("location:/foo/bar.html\r\n"),
+    
+    {ok,[{"location","http://foo/bar.html"}],201} =
+        httpd_esi:handle_headers("status:201 Created\r\nlocation:http://foo/bar.html\r\n").
 
 %%--------------------------------------------------------------------
 cgi_parse_headers() ->
diff --git a/lib/inets/test/http_test_lib.erl b/lib/inets/test/http_test_lib.erl
new file mode 100644
index 0000000000..4e119cce04
--- /dev/null
+++ b/lib/inets/test/http_test_lib.erl
@@ -0,0 +1,199 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2015-2018. All Rights Reserved.
+%% 
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+-module(http_test_lib).
+
+-include_lib("common_test/include/ct.hrl").
+-include("inets_test_lib.hrl").
+-include("http_internal.hrl").
+-include("httpc_internal.hrl").
+
+%% Note: This directive should only be used in test suites.
+-compile(export_all).
+
+dummy_server(SocketType, Inet, Extra) ->
+    dummy_server(self(), SocketType, Inet, Extra).
+
+dummy_server(Caller, SocketType, Inet, Extra) ->
+    Args = [Caller, SocketType, Inet, Extra],
+    Pid = spawn(?MODULE, dummy_server_init, Args),
+    receive
+	{port, Port} ->
+	    {Pid, Port}
+    end.
+
+dummy_server_init(Caller, ip_comm, Inet, Extra) ->
+    ContentCb = proplists:get_value(content_cb, Extra),
+    BaseOpts = [binary, {packet, 0}, {reuseaddr,true}, {active, false}, {nodelay, true}], 
+    Conf = proplists:get_value(conf, Extra),
+    {ok, ListenSocket} = gen_tcp:listen(0, [Inet | BaseOpts]),
+    {ok, Port} = inet:port(ListenSocket),
+    Caller ! {port, Port},
+    dummy_ipcomm_server_loop({httpd_request, parse, [[{max_uri,    ?HTTP_MAX_URI_SIZE},
+						      {max_header, ?HTTP_MAX_HEADER_SIZE},
+						      {max_version,?HTTP_MAX_VERSION_STRING}, 
+						      {max_method, ?HTTP_MAX_METHOD_STRING},
+						      {max_content_length, ?HTTP_MAX_CONTENT_LENGTH},
+						      {customize, httpd_custom}
+						     ]]},
+			     [], ContentCb, Conf, ListenSocket);
+
+dummy_server_init(Caller, unix_socket, Inet, Extra) ->
+    ContentCb = proplists:get_value(content_cb, Extra),
+    UnixSocket = proplists:get_value(unix_socket, Extra),
+    SocketAddr = {local, UnixSocket},
+    BaseOpts = [binary, {packet, 0}, {reuseaddr,true}, {active, false}, {nodelay, true},
+               {ifaddr, SocketAddr}],
+    Conf = proplists:get_value(conf, Extra),
+    {ok, ListenSocket} = gen_tcp:listen(0, [Inet | BaseOpts]),
+    {ok, Port} = inet:port(ListenSocket),
+    Caller ! {port, Port},
+    dummy_ipcomm_server_loop({httpd_request, parse, [[{max_uri,    ?HTTP_MAX_URI_SIZE},
+						      {max_header, ?HTTP_MAX_HEADER_SIZE},
+						      {max_version,?HTTP_MAX_VERSION_STRING},
+						      {max_method, ?HTTP_MAX_METHOD_STRING},
+						      {max_content_length, ?HTTP_MAX_CONTENT_LENGTH},
+						      {customize, httpd_custom}
+						     ]]},
+			     [], ContentCb, Conf, ListenSocket);
+
+dummy_server_init(Caller, ssl, Inet, Extra) ->
+    ContentCb = proplists:get_value(content_cb, Extra),
+    SSLOptions = proplists:get_value(ssl, Extra),
+    Conf = proplists:get_value(conf, Extra),
+    BaseOpts = [binary, {reuseaddr,true}, {active, false}, {nodelay, true} |
+	        SSLOptions], 
+    dummy_ssl_server_init(Caller, BaseOpts, Inet, ContentCb, Conf).
+
+dummy_ssl_server_init(Caller, BaseOpts, Inet, ContentCb, Conf) ->
+    {ok, ListenSocket} = ssl:listen(0, [Inet | BaseOpts]),
+    {ok, {_, Port}} = ssl:sockname(ListenSocket),
+    Caller ! {port, Port},
+    dummy_ssl_server_loop({httpd_request, parse, [[{max_uri,    ?HTTP_MAX_URI_SIZE},
+						   {max_method, ?HTTP_MAX_METHOD_STRING},
+						   {max_version,?HTTP_MAX_VERSION_STRING}, 
+						   {max_method, ?HTTP_MAX_METHOD_STRING},
+						   {max_content_length, ?HTTP_MAX_CONTENT_LENGTH},
+						   {customize, httpd_custom}
+						  ]]},
+			  [], ContentCb, Conf, ListenSocket).
+
+dummy_ipcomm_server_loop(MFA, Handlers, ContentCb, Conf, ListenSocket) ->
+    receive
+	stop ->
+	    lists:foreach(fun(Handler) -> Handler ! stop end, Handlers);
+	{stop, From} ->
+	    Stopper = fun(Handler) -> Handler ! stop end, 
+	    lists:foreach(Stopper, Handlers),
+	    From ! {stopped, self()}
+    after 0 ->
+	    {ok, Socket} = gen_tcp:accept(ListenSocket),
+	    HandlerPid  = dummy_request_handler(MFA, Socket, ContentCb, Conf),
+	    gen_tcp:controlling_process(Socket, HandlerPid),
+	    HandlerPid ! ipcomm_controller,
+	    dummy_ipcomm_server_loop(MFA, [HandlerPid | Handlers],
+				     ContentCb, Conf, ListenSocket)
+    end.
+
+dummy_ssl_server_loop(MFA, Handlers, ContentCb, Conf, ListenSocket) ->
+    receive
+	stop ->
+	    lists:foreach(fun(Handler) -> Handler ! stop end, Handlers);
+	{stop, From} ->
+	    Stopper = fun(Handler) -> Handler ! stop end, 
+	    lists:foreach(Stopper, Handlers),
+	    From ! {stopped, self()}
+    after 0 ->
+	    {ok, Socket} = ssl:transport_accept(ListenSocket),
+	    HandlerPid  = dummy_request_handler(MFA, Socket, ContentCb, Conf),
+	    ssl:controlling_process(Socket, HandlerPid),
+	    HandlerPid ! ssl_controller,
+	    dummy_ssl_server_loop(MFA, [HandlerPid | Handlers],
+				  ContentCb, Conf, ListenSocket)
+    end.
+
+dummy_request_handler(MFA, Socket, ContentCb, Conf) ->
+    spawn(?MODULE, dummy_request_handler_init, [MFA, Socket, ContentCb, Conf]).
+
+dummy_request_handler_init(MFA, Socket, ContentCb, Conf) ->
+    SockType = 
+	receive 
+	    ipcomm_controller ->
+		inet:setopts(Socket, [{active, true}]),
+		ip_comm;
+	    ssl_controller ->
+		ok = ssl:ssl_accept(Socket, infinity),
+		ssl:setopts(Socket, [{active, true}]),
+		ssl
+	end,
+    dummy_request_handler_loop(MFA, SockType, Socket, ContentCb, Conf).
+    
+dummy_request_handler_loop({Module, Function, Args}, SockType, Socket, ContentCb, Conf) ->
+    receive 
+	{Proto, _, Data} when (Proto =:= tcp) orelse (Proto =:= ssl) ->
+	    case handle_request(Module, Function, [Data | Args], Socket, ContentCb, Conf) of
+		stop when Proto =:= tcp ->
+		    gen_tcp:close(Socket);
+		stop when Proto =:= ssl ->
+		    ssl:close(Socket);
+		NewMFA ->
+		    dummy_request_handler_loop(NewMFA, SockType, Socket, ContentCb, Conf)
+	    end;
+	stop when SockType =:= ip_comm ->
+	    gen_tcp:close(Socket);
+	stop when SockType =:= ssl ->
+	    ssl:close(Socket)
+    end.
+
+handle_request(Module, Function, Args, Socket, ContentCb, Conf) ->
+    case Module:Function(Args) of
+	{ok, Result} ->
+	    case ContentCb:handle_http_msg(Result, Socket, Conf) of
+		stop ->
+		    stop;
+		<<>> ->
+		    {httpd_request, parse, [[{max_uri,?HTTP_MAX_URI_SIZE},
+					     {max_header, ?HTTP_MAX_HEADER_SIZE},
+					     {max_version,?HTTP_MAX_VERSION_STRING}, 
+					     {max_method, ?HTTP_MAX_METHOD_STRING},
+					     {max_content_length, ?HTTP_MAX_CONTENT_LENGTH},
+					     {customize, httpd_custom}
+					    ]]};
+		Data ->	
+		    handle_request(httpd_request, parse, 
+				   [Data, [{max_uri,    ?HTTP_MAX_URI_SIZE},
+					   {max_header, ?HTTP_MAX_HEADER_SIZE},
+					   {max_version,?HTTP_MAX_VERSION_STRING}, 
+					   {max_method, ?HTTP_MAX_METHOD_STRING},
+					   {max_content_length, ?HTTP_MAX_CONTENT_LENGTH},
+					   {customize, httpd_custom}
+					  ]], Socket, ContentCb, Conf)
+	    end;
+	NewMFA ->
+	    NewMFA
+    end.
+
+%% Perform a synchronous stop
+dummy_server_stop(Pid) ->
+    Pid ! {stop, self()},
+    receive 
+	{stopped, Pid} ->
+	    ok
+    end.
diff --git a/lib/inets/test/httpc_SUITE.erl b/lib/inets/test/httpc_SUITE.erl
index 5dfb1474e5..38705372c9 100644
--- a/lib/inets/test/httpc_SUITE.erl
+++ b/lib/inets/test/httpc_SUITE.erl
@@ -37,6 +37,10 @@
 -define(TLS_URL_START, "https://").
 -define(NOT_IN_USE_PORT, 8997).
 
+%% Using hardcoded file path to keep it below 107 charaters
+%% (maximum length supported by erlang)
+-define(UNIX_SOCKET, "/tmp/inets_httpc_SUITE.sock").
+
 -record(sslsocket, {fd = nil, pid = nil}).
 %%--------------------------------------------------------------------
 %% Common Test interface functions -----------------------------------
@@ -50,6 +54,8 @@ all() ->
     [
      {group, http},
      {group, sim_http},
+     {group, http_internal},
+     {group, http_unix_socket},
      {group, https},
      {group, sim_https},
      {group, misc}
@@ -58,7 +64,12 @@ all() ->
 groups() ->
     [
      {http, [], real_requests()},
-     {sim_http, [], only_simulated()},
+     %% process_leak_on_keepalive is depending on stream_fun_server_close
+     %% and it shall be the last test case in the suite otherwise cookie
+     %% will fail.
+     {sim_http, [], only_simulated() ++ [process_leak_on_keepalive]},
+     {http_internal, [], real_requests_esi()},
+     {http_unix_socket, [], simulated_unix_socket()},
      {https, [], real_requests()},
      {sim_https, [], only_simulated()},
      {misc, [], misc()}
@@ -68,6 +79,7 @@ real_requests()->
     [
      head,
      get,
+     get_query_string,
      post,
      delete,
      post_stream,
@@ -93,6 +105,12 @@ real_requests()->
      invalid_body
     ].
 
+real_requests_esi() ->
+    [slow_connection].
+
+simulated_unix_socket() ->
+    [unix_domain_socket].
+
 only_simulated() ->
     [
      cookie,
@@ -115,10 +133,10 @@ only_simulated() ->
      invalid_chunk_size,
      headers_dummy,
      headers_with_obs_fold,
+     headers_conflict_chunked_with_length,
      empty_response_header,
      remote_socket_close,
      remote_socket_close_async,
-     process_leak_on_keepalive,
      transfer_encoding,
      transfer_encoding_identity,
      redirect_loop,
@@ -127,10 +145,13 @@ only_simulated() ->
      redirect_found,
      redirect_see_other,
      redirect_temporary_redirect,
+     redirect_relative_uri,
      port_in_host_header,
      redirect_port_in_host_header,
      relaxed,
-     multipart_chunks
+     multipart_chunks,
+     get_space,
+     stream_fun_server_close
     ].
 
 misc() ->
@@ -175,15 +196,29 @@ init_per_group(Group, Config0) when Group =:= sim_https; Group =:= https->
         _:_ ->
             {skip, "Crypto did not start"}
     end;
-
+init_per_group(http_unix_socket = Group, Config0) ->
+    case os:type() of
+        {win32,_} ->
+            {skip, "Unix Domain Sockets are not supported on Windows"};
+        _ ->
+            file:delete(?UNIX_SOCKET),
+            start_apps(Group),
+            Config = proplists:delete(port, Config0),
+            Port = server_start(Group, server_config(Group, Config)),
+            [{port, Port} | Config]
+    end;
 init_per_group(Group, Config0) ->
     start_apps(Group),
     Config = proplists:delete(port, Config0),
     Port = server_start(Group, server_config(Group, Config)),
     [{port, Port} | Config].
 
+end_per_group(http_unix_socket,_Config) ->
+    file:delete(?UNIX_SOCKET),
+    ok;
 end_per_group(_, _Config) ->
     ok.
+
 do_init_per_group(Group, Config0) ->
     Config = proplists:delete(port, Config0),
     Port = server_start(Group, server_config(Group, Config)),
@@ -242,6 +277,25 @@ get(Config) when is_list(Config) ->
 
     {ok, {{_,200,_}, [_ | _], BinBody}} =  httpc:request(get, Request, [], [{body_format, binary}]),
     true = is_binary(BinBody).
+
+
+get_query_string() ->
+    [{doc, "Test http get request with query string against local server"}].
+get_query_string(Config) when is_list(Config) ->
+    Request  = {url(group_name(Config), "/dummy.html?foo=bar", Config), []},
+    {ok, {{_,200,_}, [_ | _], Body = [_ | _]}} = httpc:request(get, Request, [], []),
+
+    inets_test_lib:check_body(Body).
+
+%%--------------------------------------------------------------------
+get_space() ->
+    [{"Test http get request with '%20' in the path of the URL."}].
+get_space(Config) when is_list(Config) ->
+    Request  = {url(group_name(Config), "/space%20.html", Config), []},
+    {ok, {{_,200,_}, [_ | _], Body = [_ | _]}} = httpc:request(get, Request, [], []),
+
+    inets_test_lib:check_body(Body).
+
 %%--------------------------------------------------------------------
 post() ->
     [{"Test http post request against local server. We do in this case "
@@ -575,7 +629,26 @@ redirect_temporary_redirect(Config) when is_list(Config) ->
     {ok, {{_,200,_}, [_ | _], [_|_]}}
 	= httpc:request(post, {URL307, [],"text/plain", "foobar"},
 			[], []).
+%%-------------------------------------------------------------------------
+redirect_relative_uri() ->
+    [{doc, "The server SHOULD generate a Location header field in the response "
+      "containing a preferred URI reference for the new permanent URI.  The user "
+      "agent MAY use the Location field value for automatic redirection.  The server's "
+      "response payload usually contains a short hypertext note with a "
+      "hyperlink to the new URI(s)."}].
+redirect_relative_uri(Config) when is_list(Config) ->
+
+    URL301 = url(group_name(Config), "/301_rel_uri.html", Config),
 
+    {ok, {{_,200,_}, [_ | _], [_|_]}}
+	= httpc:request(get, {URL301, []}, [], []),
+
+    {ok, {{_,200,_}, [_ | _], []}}
+	= httpc:request(head, {URL301, []}, [], []),
+
+    {ok, {{_,200,_}, [_ | _], [_|_]}}
+	= httpc:request(post, {URL301, [],"text/plain", "foobar"},
+			[], []).
 %%-------------------------------------------------------------------------
 redirect_loop() ->
     [{"doc, Test redirect loop detection"}].
@@ -745,7 +818,7 @@ empty_body() ->
 empty_body(Config) when is_list(Config) ->
     URL = url(group_name(Config), "/empty.html", Config),
     {ok, {{_,200,_}, [_ | _], []}} =
-	httpc:request(get, {URL, []}, [{timeout, 500}], []).
+	httpc:request(get, {URL, []}, [], []).
 
 %%-------------------------------------------------------------------------
 
@@ -977,7 +1050,6 @@ headers_dummy(Config) when is_list(Config) ->
 		       {"If-Range", "Sat, 29 Oct 1994 19:43:31 GMT"},
 		       {"If-Match", "*"},
 		       {"Content-Type", "text/plain"},
-		       {"Content-Encoding", "chunked"},
 		       {"Content-Length", "6"},
 		       {"Content-Language", "en"},
 		       {"Content-Location", "http://www.foobar.se"},
@@ -1003,6 +1075,18 @@ headers_with_obs_fold(Config) when is_list(Config) ->
 
 %%-------------------------------------------------------------------------
 
+headers_conflict_chunked_with_length(doc) ->
+    ["Test the code for handling headers with both Transfer-Encoding"
+     "and Content-Length which must receive error in default (not relaxed) mode"
+     "and must receive successful response in relaxed mode"];
+headers_conflict_chunked_with_length(Config) when is_list(Config) ->
+    Request = {url(group_name(Config), "/headers_conflict_chunked_with_length.html", Config), []},
+    {error, {could_not_parse_as_http, _}} = httpc:request(get, Request, [{relaxed, false}], []),
+    {ok,{{_,200,_},_,_}} = httpc:request(get, Request, [{relaxed, true}], []),
+    ok.
+
+%%-------------------------------------------------------------------------
+
 invalid_headers(Config) ->
     Request  = {url(group_name(Config), "/dummy.html", Config), [{"cookie", undefined}]},
     {error, _} = httpc:request(get, Request, [], []).
@@ -1042,8 +1126,6 @@ remote_socket_close_async(Config) when is_list(Config) ->
 %%-------------------------------------------------------------------------
 
 process_leak_on_keepalive(Config) ->
-    {ok, ClosedSocket} = gen_tcp:listen(6666, [{active, false}]),
-    ok = gen_tcp:close(ClosedSocket),
     Request  = {url(group_name(Config), "/dummy.html", Config), []},
     HttpcHandlers0 = supervisor:which_children(httpc_handler_sup),
     {ok, {{_, 200, _}, _, Body}} = httpc:request(get, Request, [], []),
@@ -1055,11 +1137,10 @@ process_leak_on_keepalive(Config) ->
         ordsets:to_list(
           ordsets:subtract(ordsets:from_list(HttpcHandlers1),
                            ordsets:from_list(HttpcHandlers0))),
-    sys:replace_state(
-      Pid, fun (State) ->
-                   Session = element(3, State),
-                   setelement(3, State, Session#session{socket=ClosedSocket})
-           end),
+    State = sys:get_state(Pid),
+    #session{socket=Socket} = element(3, State),
+    gen_tcp:close(Socket),
+
     {ok, {{_, 200, _}, _, Body}} = httpc:request(get, Request, [], []),
     %% bad handler with the closed socket should get replaced by
     %% the new one, so children count should stay the same
@@ -1178,6 +1259,55 @@ wait_for_whole_response(Config) when is_list(Config) ->
      ReqSeqNumServer ! shutdown.
 
 %%--------------------------------------------------------------------
+stream_fun_server_close() ->
+    [{doc, "Test that an error msg is received when using a receiver fun as stream target"}].
+stream_fun_server_close(Config) when is_list(Config) ->
+    Request  = {url(group_name(Config), "/delay_close.html", Config), []},
+    Self = self(),
+    Fun = fun(X) -> Self ! X end,
+    {ok, RequestId} = httpc:request(get, Request, [], [{sync, false}, {receiver, Fun}]),
+    receive
+        {RequestId, {error, Reason}} ->
+            ct:pal("Close ~p", [Reason]),
+            ok
+    after 13000 ->
+            ct:fail(did_not_receive_close)
+    end. 
+
+%%--------------------------------------------------------------------
+slow_connection() ->
+    [{doc, "Test that a request on a slow keep-alive connection won't crash the httpc_manager"}].
+slow_connection(Config) when is_list(Config) ->
+    BodyFun = fun(0) -> eof;
+                 (LenLeft) -> timer:sleep(1000),
+                              {ok, lists:duplicate(10, "1"), LenLeft - 10}
+              end,
+    Request  = {url(group_name(Config), "/httpc_SUITE:esi_post", Config),
+                [{"content-length", "100"}],
+                "text/plain",
+                {BodyFun, 100}},
+    {ok, _} = httpc:request(post, Request, [], []),
+    %% Second request causes a crash if gen_server timeout is not set to infinity
+    %% in httpc_handler.
+    {ok, _} = httpc:request(post, Request, [], []).
+
+%%-------------------------------------------------------------------------
+unix_domain_socket() ->
+    [{"doc, Test HTTP requests over unix domain sockets"}].
+unix_domain_socket(Config) when is_list(Config) ->
+
+    URL = "http:///v1/kv/foo",
+
+    {ok,[{unix_socket,?UNIX_SOCKET}]} =
+        httpc:get_options([unix_socket]),
+    {ok, {{_,200,_}, [_ | _], _}}
+	= httpc:request(put, {URL, [], [], ""}, [], []),
+    {ok, {{_,200,_}, [_ | _], _}}
+        = httpc:request(get, {URL, []}, [], []).
+
+
+
+%%--------------------------------------------------------------------
 %% Internal Functions ------------------------------------------------
 %%--------------------------------------------------------------------
 stream(ReceiverPid, Receiver, Config) ->
@@ -1270,6 +1400,8 @@ url(https, End, Config) ->
     ?TLS_URL_START ++ Host ++ ":" ++ integer_to_list(Port) ++ End;
 url(sim_http, End, Config) ->
     url(http, End, Config);
+url(http_internal, End, Config) ->
+    url(http, End, Config);
 url(sim_https, End, Config) ->
     url(https, End, Config).
 url(http, UserInfo, End, Config) ->
@@ -1289,19 +1421,28 @@ group_name(Config) ->
 
 server_start(sim_http, _) ->
     Inet = inet_version(),
-    ok = httpc:set_options([{ipfamily, Inet}]),
-    {_Pid, Port} = dummy_server(Inet),
+    ok = httpc:set_options([{ipfamily, Inet},{unix_socket, undefined}]),
+    {_Pid, Port} = http_test_lib:dummy_server(ip_comm, Inet, [{content_cb, ?MODULE}]),
     Port;
 
 server_start(sim_https, SslConfig) ->
     Inet = inet_version(),
-    ok = httpc:set_options([{ipfamily, Inet}]),
-    {_Pid, Port} = dummy_server(ssl, Inet, SslConfig),
+    ok = httpc:set_options([{ipfamily, Inet},{unix_socket, undefined}]),
+    {_Pid, Port} = http_test_lib:dummy_server(ssl, Inet, [{ssl, SslConfig}, {content_cb, ?MODULE}]),
+    Port;
+
+server_start(http_unix_socket, Config) ->
+    Inet = local,
+    Socket = proplists:get_value(unix_socket, Config),
+    ok = httpc:set_options([{ipfamily, Inet},{unix_socket, Socket}]),
+    {_Pid, Port} = http_test_lib:dummy_server(unix_socket, Inet, [{content_cb, ?MODULE},
+                                                                  {unix_socket, Socket}]),
     Port;
 
 server_start(_, HttpdConfig) ->
     {ok, Pid} = inets:start(httpd, HttpdConfig),
     Serv = inets:services_info(),
+    ok = httpc:set_options([{ipfamily, inet_version()},{unix_socket, undefined}]),
     {value, {_, _, Info}} = lists:keysearch(Pid, 2, Serv),
     proplists:get_value(port, Info).
 
@@ -1316,14 +1457,31 @@ server_config(http, Config) ->
      {mime_type, "text/plain"},
      {script_alias, {"/cgi-bin/", filename:join(ServerRoot, "cgi-bin") ++ "/"}}
     ];
-
+server_config(http_internal, Config) ->
+    ServerRoot = proplists:get_value(server_root, Config),
+    [{port, 0},
+     {server_name,"httpc_test"},
+     {server_root, ServerRoot},
+     {document_root, proplists:get_value(doc_root, Config)},
+     {bind_address, any},
+     {ipfamily, inet_version()},
+     {mime_type, "text/plain"},
+     {erl_script_alias, {"", [httpc_SUITE]}}
+    ];
 server_config(https, Config) ->
     [{socket_type, {essl, ssl_config(Config)}} | server_config(http, Config)];
 server_config(sim_https, Config) ->
     ssl_config(Config);
+server_config(http_unix_socket, _Config) ->
+    Socket = ?UNIX_SOCKET,
+    [{unix_socket, Socket}];
+
 server_config(_, _) ->
     [].
 
+esi_post(Sid, _Env, _Input) ->
+    mod_esi:deliver(Sid, ["OK"]).
+
 start_apps(https) ->
     inets_test_lib:start_apps([crypto, public_key, ssl]);
 start_apps(sim_https) ->
@@ -1400,13 +1558,7 @@ receive_replys([ID|IDs]) ->
 	    ct:pal({recived_canceld_id, Other})
     end.
 
-%% Perform a synchronous stop
-dummy_server_stop(Pid) ->
-    Pid ! {stop, self()},
-    receive 
-	{stopped, Pid} ->
-	    ok
-    end.
+
 
 inet_version() ->
     inet. %% Just run inet for now
@@ -1534,7 +1686,7 @@ dummy_request_handler_loop({Module, Function, Args}, SockType, Socket) ->
 handle_request(Module, Function, Args, Socket) ->
     case Module:Function(Args) of
 	{ok, Result} ->
-	    case handle_http_msg(Result, Socket) of
+	    case handle_http_msg(Result, Socket, []) of
 		stop ->
 		    stop;
 		<<>> ->
@@ -1559,8 +1711,7 @@ handle_request(Module, Function, Args, Socket) ->
 	    NewMFA
     end.
 
-handle_http_msg({Method, RelUri, _, {_, Headers}, Body}, Socket) ->
-
+handle_http_msg({Method, RelUri, _, {_, Headers}, Body}, Socket, _) ->
     ct:print("Request: ~p ~p", [Method, RelUri]),
 
     NextRequest = 
@@ -1684,6 +1835,15 @@ content_length(["content-length:" ++ Value | _]) ->
 content_length([_Head | Tail]) ->
    content_length(Tail).
 
+handle_uri("GET","/dummy.html?foo=bar",_,_,_,_) ->
+    "HTTP/1.0 200 OK\r\n\r\nTEST";
+
+handle_uri("GET","/space%20.html",_,_,_,_) ->
+    Body = "<HTML><BODY>foobar</BODY></HTML>",
+    "HTTP/1.1 200 OK\r\n" ++
+        "Content-Length:" ++ integer_to_list(length(Body)) ++ "\r\n\r\n" ++
+        Body;
+
 handle_uri(_,"/just_close.html",_,_,_,_) ->
 		close;
 handle_uri(_,"/no_content.html",_,_,_,_) ->
@@ -1749,6 +1909,23 @@ handle_uri(_,"/301.html",Port,_,Socket,_) ->
 	"Content-Length:" ++ integer_to_list(length(Body))
 	++ "\r\n\r\n" ++ Body;
 
+
+handle_uri("HEAD","/301_rel_uri.html",_,_,_,_) ->
+    NewUri = "/dummy.html",
+    "HTTP/1.1 301 Moved Permanently\r\n" ++
+	"Location:" ++ NewUri ++  "\r\n" ++
+	"Content-Length:0\r\n\r\n";
+
+handle_uri(_,"/301_rel_uri.html",_,_,_,_) ->
+    NewUri = "/dummy.html",
+  Body = "<HTML><BODY><a href=" ++ NewUri ++
+	">New place</a></BODY></HTML>",
+    "HTTP/1.1 301 Moved Permanently\r\n" ++
+	"Location:" ++ NewUri ++  "\r\n" ++
+	"Content-Length:" ++ integer_to_list(length(Body))
+	++ "\r\n\r\n" ++ Body;
+
+
 handle_uri("HEAD","/302.html",Port,_,Socket,_) ->
     NewUri = url_start(Socket) ++
 	integer_to_list(Port) ++ "/dummy.html",
@@ -1852,7 +2029,6 @@ handle_uri(_,"/dummy_headers.html",_,_,Socket,_) ->
     %% user to evaluate. This is not a valid response
     %% it only tests that the header handling code works.
     Head = "HTTP/1.1 200 ok\r\n" ++
-	"Content-Length:32\r\n" ++
 	"Pragma:1#no-cache\r\n"  ++
 	"Via:1.0 fred, 1.1 nowhere.com (Apache/1.1)\r\n"  ++
 	"Warning:1#pseudonym foobar\r\n"  ++
@@ -1882,6 +2058,15 @@ handle_uri(_,"/obs_folded_headers.html",_,_,_,_) ->
     " b\r\n\r\n"
     "Hello";
 
+handle_uri(_,"/headers_conflict_chunked_with_length.html",_,_,Socket,_) ->
+    Head =  "HTTP/1.1 200 ok\r\n"
+        "Content-Length:32\r\n"
+	"Transfer-Encoding:Chunked\r\n\r\n",
+    send(Socket, Head),
+    send(Socket, http_chunk:encode("<HTML><BODY>fo")),
+    send(Socket, http_chunk:encode("obar</BODY></HTML>")),
+    http_chunk:encode_last();
+
 handle_uri(_,"/capital_transfer_encoding.html",_,_,Socket,_) ->
     Head =  "HTTP/1.1 200 ok\r\n" ++
 	"Transfer-Encoding:Chunked\r\n\r\n",
@@ -2029,9 +2214,25 @@ handle_uri(_,"/multipart_chunks.html",_,_,Socket,_) ->
     send(Socket, Head),
     send_multipart_chunks(Socket),
     http_chunk:encode_last();
+handle_uri(_,"/delay_close.html",_,_,Socket,_) ->
+    ct:sleep(10000),
+    close(Socket);
 handle_uri("HEAD",_,_,_,_,_) ->
     "HTTP/1.1 200 ok\r\n" ++
 	"Content-Length:0\r\n\r\n";
+handle_uri("PUT","/v1/kv/foo",_,_,_,_) ->
+    "HTTP/1.1 200 OK\r\n" ++
+        "Date: Tue, 20 Feb 2018 14:39:08 GMT\r\n" ++
+        "Content-Length: 5\r\n\r\n" ++
+        "Content-Type: application/json\r\n\r\n" ++
+        "true\n";
+handle_uri("GET","/v1/kv/foo",_,_,_,_) ->
+    "HTTP/1.1 200 OK\r\n" ++
+        "Date: Tue, 20 Feb 2018 14:39:08 GMT\r\n" ++
+        "Content-Length: 24\r\n" ++
+        "Content-Type: application/json\r\n\r\n" ++
+        "[{\"Value\": \"aGVsbG8=\"}]\n";
+
 handle_uri(_,_,_,_,_,DefaultResponse) ->
     DefaultResponse.
 
diff --git a/lib/inets/test/httpd_SUITE.erl b/lib/inets/test/httpd_SUITE.erl
index 6c8728470b..9a85c51d24 100644
--- a/lib/inets/test/httpd_SUITE.erl
+++ b/lib/inets/test/httpd_SUITE.erl
@@ -129,7 +129,7 @@ groups() ->
      {http_1_1, [],
       [host, chunked, expect, cgi, cgi_chunked_encoding_test,
        trace, range, if_modified_since, mod_esi_chunk_timeout,
-       esi_put] ++ http_head() ++ http_get() ++ load()},
+       esi_put, esi_post] ++ http_head() ++ http_get() ++ load()},
      {http_1_0, [], [host, cgi, trace] ++ http_head() ++ http_get() ++ load()},
      {http_0_9, [], http_head() ++ http_get() ++ load()}
     ].
@@ -923,8 +923,11 @@ esi(Config) when is_list(Config) ->
 		      {no_header, "cache-control"}]),
     ok = http_status("GET /cgi-bin/erl/httpd_example:peer ",
 	  	     Config, [{statuscode, 200},
-	 	      {header, "peer-cert-exist", peer(Config)}]).
-
+                              {header, "peer-cert-exist", peer(Config)}]),
+    ok = http_status("GET /cgi-bin/erl/httpd_example:new_status_and_location ",
+                     Config, [{statuscode, 201},
+                              {header, "location"}]).
+    
 %%-------------------------------------------------------------------------
 esi_put() ->
     [{doc, "Test mod_esi PUT"}].
@@ -932,7 +935,20 @@ esi_put() ->
 esi_put(Config) when is_list(Config) ->
     ok = http_status("PUT /cgi-bin/erl/httpd_example/put/123342234123 ",
 		     Config, [{statuscode, 200}]).
- 
+%%-------------------------------------------------------------------------
+esi_post() ->
+    [{doc, "Test mod_esi POST"}].
+
+esi_post(Config) when is_list(Config) ->
+    Chunk = "ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ",
+    Data = lists:duplicate(10000, Chunk),
+    Length = lists:flatlength(Data),
+    ok = http_status("POST /cgi-bin/erl/httpd_example/post ",
+                     {"Content-Length:" ++ integer_to_list(Length) ++ "\r\n",
+                      Data},
+                     [{http_version, "HTTP/1.1"} |Config], 
+                     [{statuscode, 200}]).
+
 %%-------------------------------------------------------------------------
 mod_esi_chunk_timeout(Config) when is_list(Config) -> 
     ok = httpd_1_1:mod_esi_chunk_timeout(proplists:get_value(type, Config), 
diff --git a/lib/inets/test/httpd_basic_SUITE.erl b/lib/inets/test/httpd_basic_SUITE.erl
index 931cd076cc..94d22ea76c 100644
--- a/lib/inets/test/httpd_basic_SUITE.erl
+++ b/lib/inets/test/httpd_basic_SUITE.erl
@@ -303,7 +303,10 @@ escaped_url_in_error_body(Config) when is_list(Config) ->
     %% Ask for a non-existing page(1)
     Path            = "/<b>this_is_bold<b>",
     HTMLEncodedPath = http_util:html_encode(Path),
-    URL2            = URL1 ++ Path,
+    URL2 = uri_string:recompose(#{scheme => "http",
+                                  host => "localhost",
+                                  port => Port,
+                                  path => Path}),
     {ok, {404, Body3}} = httpc:request(get, {URL2, []},
 				       [{url_encode,  true}, 
 					{version,     "HTTP/1.0"}],
diff --git a/lib/inets/test/httpd_bench_SUITE.erl b/lib/inets/test/httpd_bench_SUITE.erl
new file mode 100644
index 0000000000..9d8cbf9ae2
--- /dev/null
+++ b/lib/inets/test/httpd_bench_SUITE.erl
@@ -0,0 +1,846 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2012. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+
+%%
+-module(httpd_bench_SUITE).
+-compile(export_all).
+
+-include_lib("common_test/include/ct.hrl").
+-include_lib("common_test/include/ct_event.hrl").
+-include_lib("public_key/include/public_key.hrl").
+-include_lib("kernel/include/file.hrl").
+
+-define(remote_host, "NETMARKS_REMOTE_HOST").
+-define(LF, [10]).
+-define(CR, [13]).
+-define(CRLF, ?CR ++ ?LF).
+
+%%--------------------------------------------------------------------
+%% Common Test interface functions -----------------------------------
+%%--------------------------------------------------------------------
+suite() -> 
+    [{ct_hooks,[{ts_install_cth,[{nodenames,2}]}]}].
+
+all() -> 
+    [
+     {group, http_dummy},
+     {group, http_inets},
+     {group, http_nginx},
+     {group, https_inets},
+     {group, https_dummy},
+     {group, https_nginx},
+     {group, http_dummy_keep_alive},
+     {group, http_inets_keep_alive},
+     {group, http_nginx_keep_alive},
+     {group, https_inets_keep_alive},
+     {group, https_dummy_keep_alive},
+     {group, https_nginx_keep_alive}
+    ].
+
+groups() -> 
+    [
+     {http_dummy, [],  client_tests()},
+     {http_inets, [],   client_tests()},
+     {http_nginx, [],   client_tests()},
+     {https_dummy, [],  client_tests()}, 
+     {https_inets, [],  client_tests()},
+     {https_nginx, [],  client_tests()},
+     {http_dummy_keep_alive, [],  client_tests()},
+     {http_inets_keep_alive, [],  client_tests()},
+     {http_nginx_keep_alive, [],  client_tests()},
+     {https_dummy_keep_alive, [], client_tests()},
+     {https_inets_keep_alive, [], client_tests()},
+     {https_nginx_keep_alive, [], client_tests()}
+    ].
+
+    
+client_tests() ->
+    [wget_small,
+     erl_dummy_small,
+     httpc_small,
+     wget_big,
+     erl_dummy_big, 
+     httpc_big
+    ].
+
+init_per_suite(Config) -> 
+    try	
+	{Node, Host} = setup(Config, node()),
+	init_ssl(Config),
+	[{iter, 10}, {server_node, Node}, {server_host, Host} | Config]
+    catch _:_ ->
+	    {skipped, "Benchmark machines only"}
+    end.
+
+end_per_suite(_Config) -> 
+    [application:stop(App) || App <- [asn1, crypto, public_key, ssl, inets]].
+
+init_per_group(Group, Config) when Group == http_dummy_keep_alive; 
+				   Group == https_dummy_keep_alive;
+				   Group == http_inets_keep_alive; 
+				   Group == https_inets_keep_alive;
+				   Group == http_nginx_keep_alive;
+				   Group == https_nginx_keep_alive ->
+    Version = http_version(Group),
+    start_web_server(Group,
+		     [{keep_alive, true}, 
+		      {reuse_sessions, false},
+		      {http_version, Version},
+		      {http_opts,[{version, Version}]},
+		      {http_headers, [{"connection", "keep-alive"}]},
+		      {httpc_opts, [{keep_alive_timeout, 1500}, 
+				    {max_keep_alive_length, ?config(iter, Config)}]}
+		      | Config]);
+init_per_group(Group, Config)  when Group == http_dummy; 
+				    Group == https_dummy;
+				    Group == http_inets; 
+				    Group == https_inets;
+				    Group == http_nginx;
+				    Group == https_nginx ->
+    Version = http_version(Group),
+    start_web_server(Group, 
+		     [{keep_alive, false}, 
+		      {reuse_sessions, false},
+		      {http_version, Version},
+		      {http_headers, [{"connection", "close"}]},
+		      {http_opts,[{version, Version}]},
+		      {httpc_opts, [{keep_alive_timeout, 0}, {max_keep_alive_length, 0}]}
+		      | Config]);
+
+
+init_per_group(_, Config) ->
+    Config.
+
+end_per_group(Group, Config) ->
+    stop_web_server(Group, Config).
+
+init_per_testcase(TestCase, Config) when TestCase == httpc_small;
+					 TestCase == httpc_big
+					 -> 
+    Opts = ?config(httpc_opts, Config),
+    inets:start(httpc, [{profile, TestCase}, {socket_opts, [{nodelay, true}]}]),
+    httpc:set_options(Opts, TestCase),
+    [{profile, TestCase} | proplists:delete(profile, Config)];
+
+init_per_testcase(_, Config) -> 
+    Config.
+end_per_testcase(TestCase, _Config) when TestCase == httpc_small;
+					 TestCase == httpc_big ->	
+    ok = inets:stop(httpc, TestCase);
+end_per_testcase(_TestCase, Config) ->	
+    Config.
+%%--------------------------------------------------------------------
+%% Test Cases --------------------------------------------------------
+%%--------------------------------------------------------------------
+
+erl_dummy_small(Config) when is_list(Config) -> 
+    {ok, Result} = run_test(httpd_lib_client, "1k_file", Config),
+    notify(Result, Config, "erl_1k_file"). 
+
+erl_dummy_big(Config)  when is_list(Config) -> 
+    {ok, Result} = run_test(httpd_lib_client, "1M_file", Config),
+    notify(Result, Config, "erl_1M_file"). 
+
+wget_small(Config) when is_list(Config) -> 
+    {ok, Result} = run_test(wget_client, "1k_file", Config),
+    notify(Result, Config, "wget_1k_file"). 
+
+wget_big(Config)  when is_list(Config) -> 
+    {ok, Result} = run_test(wget_client, "1M_file", Config),
+    notify(Result, Config, "wget_1M_file"). 
+
+httpc_small(Config) when is_list(Config) -> 
+    {ok, Result} = run_test(httpc_client, "1k_file", Config),
+    notify(Result, Config, "httpc_1k_file"). 
+
+httpc_big(Config)  when is_list(Config) -> 
+    {ok, Result} = run_test(httpc_client, "1M_file", Config),
+    notify(Result, Config, "httpc_1M_file"). 
+
+%%--------------------------------------------------------------------
+%% Internal functions ------------------------------------------------
+%%--------------------------------------------------------------------
+
+%%--------------------------------------------------------------------
+%% Report benchmark results  ------------------------------------------------
+%%--------------------------------------------------------------------
+
+notify({TestPerSec, _MBps}, Config, Suffix) ->
+    Name = lists:concat([?config(protocol,Config), " ", 
+			 server_name(Config, [dummy_pid, httpd_pid, nginx_port]), 
+			 "", Suffix]),
+    ct:comment("~p tps", [TestPerSec]),
+    ct_event:notify(#event{name = benchmark_data,
+			   data=[{value, TestPerSec},
+				 {suite, ?MODULE},
+				 {name, Name}]}),
+			 ok.
+%%--------------------------------------------------------------------
+%% Setup erlang nodes  ------------------------------------------------
+%%--------------------------------------------------------------------
+
+server_name(Config, [Server | Rest]) ->
+    case proplists:get_value(Server, Config) of
+	undefined ->
+	    server_name(Config, Rest);
+	_ ->
+	    server_name(Server)
+    end.
+
+server_name(httpd_pid) ->   
+   "inets";
+server_name(nginx_port) -> 
+    "nginx";
+server_name(dummy_pid) ->
+    "erlang".
+
+setup(_Config, nonode@nohost) ->
+    exit(dist_not_enabled);
+setup(_Config, _LocalNode) ->
+    Host = case os:getenv(?remote_host) of
+	       false ->
+		   {ok, This} = inet:gethostname(),
+		   This;
+	       RemHost ->
+		   RemHost
+	   end,
+    Node = list_to_atom("inets_perf_server@" ++ Host),
+    SlaveArgs = case init:get_argument(pa) of
+	       {ok, PaPaths} ->
+		   lists:append([" -pa " ++ P || [P] <- PaPaths]);
+	       _ -> []
+	   end,
+    Prog =
+	case os:find_executable("erl") of
+	    false -> "erl";
+	    P -> P
+	end,
+    case net_adm:ping(Node) of
+	pong -> ok;
+	pang ->
+	    {ok, Node} = slave:start(Host, inets_perf_server, SlaveArgs, no_link, Prog)
+    end,
+    Path = code:get_path(),
+    true = rpc:call(Node, code, set_path, [Path]),
+    [ensure_started(Node, App) || App <- [asn1, crypto, public_key, ssl, inets]],
+    [ensure_started(node(), App) || App <- [asn1, crypto, public_key, ssl, inets]],
+    (Node =:= node()) andalso restrict_schedulers(client),
+    {Node, Host}.
+
+ensure_started(Node, App) ->
+     ok = rpc:call(Node, application, ensure_started, [App]).
+
+
+restrict_schedulers(Type) ->
+    %% We expect this to run on 8 core machine
+    Extra0 = 1,
+    Extra =  if (Type =:= server) -> -Extra0; true -> Extra0 end,
+    Scheds = erlang:system_info(schedulers),
+    erlang:system_flag(schedulers_online, (Scheds div 2) + Extra).
+
+%%--------------------------------------------------------------------
+%% Setup TLS input files  ------------------------------------------------
+%%--------------------------------------------------------------------
+
+init_ssl(Config) ->
+    DDir = ?config(data_dir, Config),
+    PDir = ?config(priv_dir, Config),
+    {ok, _} = make_certs:all(DDir,
+			     PDir).
+cert_opts(Config) ->
+    ClientCaCertFile = filename:join([?config(priv_dir, Config), 
+				      "client", "cacerts.pem"]),
+    ClientCertFile = filename:join([?config(priv_dir, Config), 
+				    "client", "cert.pem"]),
+    ServerCaCertFile = filename:join([?config(priv_dir, Config), 
+				      "server", "cacerts.pem"]),
+    ServerCertFile = filename:join([?config(priv_dir, Config), 
+				    "server", "cert.pem"]),
+    ServerKeyFile = filename:join([?config(priv_dir, Config), 
+			     "server", "key.pem"]),
+    ClientKeyFile = filename:join([?config(priv_dir, Config), 
+				   "client", "key.pem"]),
+    [{server_verification_opts, [{reuseaddr, true}, 
+				 {cacertfile, ServerCaCertFile},
+				 {ciphers, ["ECDHE-RSA-AES256-GCM-SHA384"]},
+				 {certfile, ServerCertFile}, {keyfile, ServerKeyFile}]},
+     {client_verification_opts, [
+				 %%{verify, verify_peer},
+				 {cacertfile, ClientCaCertFile}, 
+				 {certfile, ClientCertFile},  
+				 {keyfile, ClientKeyFile}]}]. 
+
+%%--------------------------------------------------------------------
+%% Run clients  ------------------------------------------------
+%%--------------------------------------------------------------------
+
+run_test(Client, File, Config) -> 
+    Parent = self(),
+    Pid = spawn(fun() ->
+			receive
+			    go -> 
+				Parent ! {self(),
+					  do_runs(Client, [{file, File} | Config])}
+			end
+		end),
+    Pid ! go,
+    receive
+	{Pid,{{tps, Tps}, {mbps, MBps}}} ->
+	    ct:pal("Tps: ~p  Bps~p", [Tps, MBps]),
+	    {ok, {Tps, MBps}}
+    end.
+
+do_runs(Client, Config) ->
+    N = ?config(iter, Config),
+    DataDir = ?config(data_dir, Config),
+    File = ?config(file, Config),
+    Name = filename:join(DataDir, File), 
+    Args = ?MODULE:Client(Config),
+    ?MODULE:Client({init, Args}),
+    Run = 
+	fun() ->
+		ok = ?MODULE:Client(Args, N)	
+	end,
+    {ok, Info} = file:read_file_info(Name, []),
+    Length = Info#file_info.size,
+    {TimeInMicro, _} = timer:tc(Run),
+    ReqPerSecond = (1000000 * N) div TimeInMicro,
+    BytesPerSecond = (1000000 * N * Length) div TimeInMicro,
+    {{tps, ReqPerSecond}, {mbps, BytesPerSecond}}.
+
+
+httpc_client({init, [_, Profile, URL, Headers, HTTPOpts]}) ->
+     %% Make sure pipelining feature will kick in when appropriate. 
+    {ok, {{_ ,200, "OK"}, _,_}} = httpc:request(get,{URL, Headers}, HTTPOpts, 
+						[{body_format, binary}, 
+						 {socket_opts, [{nodelay, true}]}], Profile),
+    ct:sleep(1000);
+httpc_client(Config) ->
+    File = ?config(file, Config),
+    Protocol = ?config(protocol, Config),
+    Profile = ?config(profile, Config),
+    URL = (?config(urlfun,Config))(File),
+    Headers =  ?config(http_headers, Config),
+    HTTPOpts = ?config(http_opts, Config),
+    [Protocol, Profile, URL, Headers, HTTPOpts].
+httpc_client(_,0) ->
+    ok;
+httpc_client([Protocol, Profile, URL, Headers, HTTPOpts], N) ->
+    {ok, {{_ ,200,"OK"}, _,_}} = httpc:request(get,{URL, Headers}, HTTPOpts, [{body_format, binary},
+									     {socket_opts, [{nodelay, true}]}], Profile),
+    httpc_client([Protocol, Profile, URL, Headers, HTTPOpts], N-1).
+
+httpd_lib_client({init, [_, Type, Version, Request, Host, Port, Opts]}) ->
+    ok = httpd_test_lib:verify_request(Type, Host, 
+     				       Port,  
+     				       Opts, node(),
+     				       Request,
+     				       [{statuscode, 200},
+     					{version, Version}], infinity),
+    ct:sleep(1000);
+httpd_lib_client(Config) ->
+    File = ?config(file, Config),
+    KeepAlive = ?config(keep_alive, Config),
+    Host = ?config(server_host, Config),
+    Port = ?config(port, Config),
+    ReuseSession = ?config(reuse_sessions, Config),
+    {Type, Opts} = 
+	case ?config(protocol, Config) of
+	    "http" ->
+		{ip_comm, [{active, true}, {mode, binary},{nodelay, true}]};
+	    "https" ->	
+		SSLOpts =  proplists:get_value(client_verification_opts, cert_opts(Config)),
+		{ssl, [{active, true}, {mode, binary}, {nodelay, true},  
+		       {reuse_sessions, ReuseSession} | SSLOpts]}
+		    
+	end,
+    Version = ?config(http_version, Config),
+    Request = case KeepAlive of
+		  true ->
+		      http_request("GET /" ++ File ++ " ", Version, Host, {"connection:keep-alive\r\n", ""});
+		  false ->
+		      http_request("GET /" ++ File ++ " ", Version, Host)
+	      end,
+    
+    Args = [KeepAlive, Type, Version, Request, Host, Port, Opts],
+    httpd_lib_client(Args, 1),
+    Args.
+
+httpd_lib_client(_, 0) ->
+    ok;
+httpd_lib_client([true, Type, Version, Request, Host, Port, Opts], N) ->
+    ok = httpd_test_lib:verify_request_N(Type, Host, 
+					 Port,  
+					 Opts, node(),
+					 Request,
+					 [{statuscode, 200},
+					  {version, Version}], infinity, N);
+httpd_lib_client([false, Type, Version, Request, Host, Port, Opts] = List, N) ->
+    ok = httpd_test_lib:verify_request(Type, Host, 
+				       Port,  
+				       Opts, node(),
+				       Request,
+				       [{statuscode, 200},
+					{version, Version}], infinity),
+    httpd_lib_client(List, N-1).
+
+wget_client({init,_}) ->
+    ok;
+wget_client(Config) ->
+    File = ?config(file, Config),
+    URL = (?config(urlfun,Config))(File),
+    KeepAlive = ?config(keep_alive, Config),
+    PrivDir = ?config(priv_dir, Config),
+    Protocol = ?config(protocol, Config),
+    Iter = ?config(iter, Config),
+    FileName = filename:join(PrivDir, "wget_req"),
+    ProtocolOpts = case Protocol of
+		    "http" ->
+			   [];
+		       "https" ->
+			   proplists:get_value(client_verification_opts, cert_opts(Config))
+		   end,
+    wget_req_file(FileName,URL,Iter),
+    [KeepAlive, FileName, URL, Protocol, ProtocolOpts, Iter].
+wget_client([KeepAlive, WgetFile, _URL, Protocol, ProtocolOpts, _], _) ->
+    process_flag(trap_exit, true),
+    Cmd = wget_N(KeepAlive, WgetFile, Protocol, ProtocolOpts),
+    %%ct:pal("Wget cmd: ~p", [Cmd]),
+    Port = open_port({spawn, Cmd}, [stderr_to_stdout]), 
+    wait_for_wget(Port).
+
+
+%%--------------------------------------------------------------------
+%% Start/stop servers  ------------------------------------------------
+%%--------------------------------------------------------------------
+start_web_server(Group, Config) when Group == http_dummy;
+				     Group == http_dummy_keep_alive ->
+    start_dummy("http", Config);
+
+start_web_server(Group, Config) when Group == https_dummy;
+				     Group == https_dummy_keep_alive ->
+    start_dummy("https", Config);
+
+start_web_server(Group, Config) when Group == http_inets;
+				     Group == http_inets_keep_alive ->
+    start_inets("http", [], Config);
+    
+start_web_server(Group, Config) when Group == https_inets;
+				     Group == https_inets_keep_alive ->
+    Opts = proplists:get_value(server_verification_opts, cert_opts(Config)),
+    ReuseSessions = ?config(reuse_sessions, Config),
+    SSLConfHttpd = [{socket_type, {essl,
+				   [{nodelay, true}, {reuse_sessions, ReuseSessions} | Opts]}}],
+    start_inets("https", SSLConfHttpd, Config);
+
+start_web_server(Group, Config)  when Group == http_nginx;
+				      Group == http_nginx_keep_alive ->
+    case os:find_executable("nginx") of
+	false ->
+	    {skip, "nginx not found"};
+	_ ->
+	    start_nginx("http",  Config)
+    end;
+
+start_web_server(Group, Config)  when Group == https_nginx;
+				      Group == https_nginx_keep_alive ->
+     case os:find_executable("nginx") of
+	false ->
+	    {skip, "nginx not found"};
+	 _ ->
+	     start_nginx("https",  cert_opts(Config) ++ Config)  
+     end.
+   
+start_inets(Protocol, ConfHttpd, Config) ->
+    PrivDir = ?config(priv_dir, Config),
+    DataDir = ?config(data_dir, Config),
+    Node = ?config(server_node, Config),
+    Host = ?config(server_host, Config),    
+    HTTPVersion = ?config(http_version, Config),    
+    Conf = [httpd, [{port,0},
+		    {http_version, HTTPVersion},
+		    {ipfamily, inet},
+		    {server_name, "inets_test"},
+		    {server_root, PrivDir}, 
+		    {document_root, DataDir},
+		    {keep_alive, ?config(keep_alive, Config)},
+		    {keep_alive_timeout, 360}
+		    | ConfHttpd]],
+    {ok, Pid} = rpc:call(Node, inets, start, Conf),
+    Port = proplists:get_value(port,  rpc:call(Node, httpd, info, [Pid])),
+    F = fun(File) -> 
+		lists:concat([Protocol,"://",Host,":",Port,"/",File]) 
+	end,
+    [{httpd_pid,Pid},{urlfun,F},{protocol,Protocol},{port,Port} | Config].
+
+start_dummy("http"= Protocol, Config) ->
+    HTTPVersion = ?config(http_version, Config),    
+    Node = ?config(server_node, Config),
+    %%DataDir= ?config(data_dir, Config),
+    Host = ?config(server_host, Config),
+    Conf = [
+	    %%{big, filename:join(DataDir, "1M_file")},
+	    %%{small, filename:join(DataDir, "1k_file")},
+	    {big, {gen,  crypto:rand_bytes(1000000)}},
+	    {small, {gen,  crypto:rand_bytes(1000)}},
+	    {http_version, HTTPVersion},
+	    {keep_alive,  ?config(keep_alive, Config)}
+	   ],
+    {Pid, Port} = rpc:call(Node, http_test_lib, dummy_server, [ip_comm, inet, [{content_cb, ?MODULE}, {conf, Conf}]]),
+    F = fun(File) -> 
+		lists:concat([Protocol,"://",Host,":",Port,"/",File]) 
+	end,
+    [{dummy_pid,Pid},{urlfun,F},{protocol, Protocol},{port,Port} | Config];
+
+start_dummy("https" = Protocol, Config) ->
+    HTTPVersion = ?config(http_version, Config),    
+    Node = ?config(server_node, Config),
+    %% DataDir= ?config(data_dir, Config),
+    Host = ?config(server_host, Config),
+    SSLOpts =  proplists:get_value(server_verification_opts, cert_opts(Config)),
+    Opts = [{active, true}, {nodelay, true}, {reuseaddr, true} | SSLOpts],
+    Conf = [%%{big, filename:join(DataDir, "1M_file")},
+	    %%{small, filename:join(DataDir, "1k_file")},
+	    {big, {gen, crypto:rand_bytes(1000000)}},
+	    {small, {gen, crypto:rand_bytes(1000)}},
+	    {http_version, HTTPVersion},
+	    {keep_alive, ?config(keep_alive, Config)}
+	   ],
+    {Pid, Port} = rpc:call(Node, http_test_lib, dummy_server,
+			   [ssl, inet, [{ssl, Opts}, {content_cb, ?MODULE}, {conf, Conf}]]),
+    F = fun(File) -> 
+		lists:concat([Protocol,"://",Host,":",Port,"/",File]) 
+	end,
+    [{dummy_pid,Pid},{urlfun,F},{protocol,Protocol},{port,Port} | Config].
+
+start_nginx(Protocol, Config) ->
+    PrivDir = ?config(priv_dir, Config),
+    DataDir = ?config(data_dir, Config),
+    Host = ?config(server_host, Config),    
+    Port = inet_port(node()),
+    
+    ConfFile = filename:join(PrivDir, "nginx.conf"),
+    nginx_conf(ConfFile, [{port, Port}, {protocol, Protocol} | Config]),
+    Cmd = "nginx -c " ++ ConfFile, 
+    NginxPort =  open_port({spawn, Cmd}, [{cd, DataDir}, stderr_to_stdout]), 
+
+    F = fun(File) -> 
+ 		lists:concat([Protocol,"://",Host,":",Port,"/",File]) 
+	end,
+    
+    wait_for_nginx_up(Host, Port),
+   
+    [{port, Port},{nginx_port, NginxPort},{urlfun,F},{protocol, Protocol} | Config ].
+
+stop_nginx(Config)->
+    PrivDir = ?config(priv_dir, Config),    
+    {ok, Bin} = file:read_file(filename:join(PrivDir, "nginx.pid")),
+    Pid = string:strip(binary_to_list(Bin), right, $\n),
+    Cmd = "kill " ++ Pid,
+    os:cmd(Cmd).
+    
+stop_web_server(Group, Config) when  Group == http_inets;
+				     Group == http_inets_keep_alive;
+				     Group == https_inets;
+				     Group == https_inets_keep_alive -> 
+    ServerNode = ?config(server_node, Config),
+    rpc:call(ServerNode, inets, stop, [httpd, ?config(httpd_pid, Config)]);
+stop_web_server(Group, Config) when  Group == http_dummy;
+				     Group == http_dummy_keep_alive;
+				     Group == https_dummy;
+				     Group == https_dummy_keep_alive -> 
+    stop_dummy_server(Config);
+stop_web_server(Group, Config) when  Group == http_nginx;
+				     Group == http_nginx_keep_alive;
+				     Group == https_nginx;
+				     Group == https_nginx_keep_alive -> 
+    stop_nginx(Config).
+
+stop_dummy_server(Config) ->    
+      case ?config(dummy_pid, Config) of
+	  Pid when is_pid(Pid) ->
+	      exit(Pid, kill);
+	  _ ->
+	      ok
+      end.
+
+%%--------------------------------------------------------------------
+%% Misc  ------------------------------------------------
+%%--------------------------------------------------------------------
+http_request(Request, "HTTP/1.1" = Version, Host, {Headers, Body}) ->
+    Request ++ Version ++ "\r\nhost:" ++ Host ++ "\r\n" ++ Headers ++ "\r\n" ++ Body;
+http_request(Request, Version, _, {Headers, Body}) ->
+    Request ++ Version ++ "\r\n" ++ Headers  ++ "\r\n" ++ Body.
+
+http_request(Request, "HTTP/1.1" = Version, Host) ->
+    Request ++ Version ++ "\r\nhost:" ++ Host  ++ "\r\n\r\n";
+http_request(Request, Version, _) ->
+    Request ++ Version ++ "\r\n\r\n".
+
+http_version(_) ->
+    "HTTP/1.1".
+
+inet_port(Node) ->
+    {Port, Socket} = do_inet_port(Node),
+     rpc:call(Node, gen_tcp, close, [Socket]),
+     Port.
+
+do_inet_port(Node) ->
+    {ok, Socket} = rpc:call(Node, gen_tcp, listen, [0, [{reuseaddr, true}]]),
+    {ok, Port} = rpc:call(Node, inet, port, [Socket]),
+    {Port, Socket}.
+ 
+%%--------------------------------------------------------------------
+%% Dummy server callbacks  ------------------------------------------------
+%%--------------------------------------------------------------------
+
+handle_request(CB, S, "/1M_file" ++ _, Opts) ->
+    Name = proplists:get_value(big, Opts),
+    KeepAlive = proplists:get_value(keep_alive, Opts),
+    do_handle_request(CB, S, Name, Opts, KeepAlive);
+handle_request(CB, S, "/1k_file" ++ _, Opts) ->
+    Name = proplists:get_value(small, Opts),
+    KeepAlive = proplists:get_value(keep_alive, Opts),
+    do_handle_request(CB, S, Name, Opts, KeepAlive).
+
+do_handle_request(CB, S, Name, Opts, KeepAlive) when is_list(Name) ->
+    Version = proplists:get_value(http_version, Opts),
+    {ok, Fdesc} = file:open(Name, [read, binary]),
+    {ok, Info} = file:read_file_info(Name, []),
+    Length = Info#file_info.size,
+    Response = response_status_line_and_headers(Version, "Content-Length:" 
+						++ integer_to_list(Length) ++ ?CRLF, keep_alive(KeepAlive)), 
+    CB:send(S, Response),
+    send_file(CB, S, Fdesc);
+do_handle_request(CB, S, {gen, Data}, Opts, KeepAlive) ->
+    Version = proplists:get_value(http_version, Opts),
+    Length = size(Data),
+    Response = response_status_line_and_headers(Version, "Content-Length:" 
+						++ integer_to_list(Length) ++ ?CRLF, keep_alive(KeepAlive)), 
+    CB:send(S, Response),
+    send_file(CB, S, {gen, Data}).
+    
+send_file(CB, S, {gen, Data})  ->
+    CB:send(S, Data);
+    %% ChunkSize = 64*1024,
+    %% case size(Data) of
+    %% 	N when N > ChunkSize ->
+    %% 	    <<Chunk:N/binary, Rest/binary>> = Data,
+    %% 	    %%{Chunk, Rest} = lists:split(N, Data),
+    %% 	    CB:send(S, Chunk),
+    %% 	    send_file(CB, S, {gen, Rest});
+    %% 	_ ->
+    %% 	    CB:send(S, Data)
+    %% end; 
+
+send_file(CB, S, FileDesc) ->
+    case file:read(FileDesc, 64*1024) of
+	{ok, Chunk} ->
+	    CB:send(S, Chunk),
+	    send_file(CB, S, FileDesc);	
+	eof ->
+	    file:close(FileDesc),
+	    ok
+    end.
+
+response_status_line_and_headers(Version, Headers,  ConnectionHeader) -> 
+    StatusLine = [Version, " ", "200 OK", ?CRLF],
+    [StatusLine, Headers, ConnectionHeader, ?CRLF].
+
+keep_alive(true)->
+    "Connection:keep-alive\r\n";
+keep_alive(false) ->
+    "Connection:close\r\n".
+
+handle_http_msg({_Method, RelUri, _, {_, _Headers}, _Body}, Socket, Conf) ->
+    handle_request(connect_cb(Socket), Socket, RelUri, Conf),
+    case proplists:get_value(keep_alive, Conf) of
+	true ->
+	    <<>>;
+	false ->
+	    stop
+    end.
+    
+connect_cb({sslsocket, _, _}) ->
+    ssl;
+connect_cb(_) ->
+    gen_tcp.
+
+%%--------------------------------------------------------------------
+%% Setup wget  ------------------------------------------------
+%%--------------------------------------------------------------------
+wget_req_file(FileName, Url, Iter) ->
+    {ok, File} = file:open(FileName, [write]),
+    write_urls(File, Url, Iter).
+
+write_urls(File, Url, 1) ->
+    file:write(File, Url), 
+    file:close(File);
+write_urls(File, Url, N) ->
+    file:write(File, Url), 
+    file:write(File, "\n"),
+    write_urls(File, Url, N-1).
+    
+wait_for_wget(Port) ->
+    receive 
+	{Port, {data, _Data}} when is_port(Port) ->
+	    wait_for_wget(Port);
+	{Port, closed} -> 
+	    ok;
+	{'EXIT', Port, _Reason} ->
+	    ok
+    end.
+
+wget_N(KeepAlive, WegetFile, "http", _ProtocolOpts) ->
+    "wget -i " ++ WegetFile ++ " " ++ wget_keep_alive(KeepAlive) ++ 
+	" --no-cache --timeout=120" ;
+wget_N(KeepAlive, WegetFile, "https", ProtocolOpts) ->
+    
+    "wget -i " ++ WegetFile ++ " " ++ wget_keep_alive(KeepAlive) 
+	++ wget_cert(ProtocolOpts) ++ wget_key(ProtocolOpts)
+	++ wget_cacert(ProtocolOpts) ++ 
+	" --no-cache --timeout=120".
+
+wget(KeepAlive, URL, "http", _ProtocolOpts) ->
+    "wget " ++ URL ++ " " ++ wget_keep_alive(KeepAlive) ++ 
+	" --no-cache --timeout=120" ;
+wget(KeepAlive, URL, "https", ProtocolOpts) ->
+    
+    "wget " ++ URL ++ " " ++ wget_keep_alive(KeepAlive) 
+	++ wget_cert(ProtocolOpts) ++ wget_key(ProtocolOpts)
+	++ wget_cacert(ProtocolOpts) ++ 
+	" --no-cache --timeout=120".
+
+wget_keep_alive(true)->
+    "";
+wget_keep_alive(false) ->
+   "--no-http-keep-alive ".
+
+wget_cacert(ProtocolOpts) ->
+    "--ca-certificate=" ++ proplists:get_value(cacertfile, ProtocolOpts) ++ " ".
+
+wget_cert(ProtocolOpts) ->
+    "--certificate=" ++ proplists:get_value(certfile, ProtocolOpts) ++ " ".
+
+wget_key(ProtocolOpts) ->
+    "--private-key=" ++ proplists:get_value(keyfile, ProtocolOpts) ++ " ".
+
+%%--------------------------------------------------------------------
+%% Setup nginx  ------------------------------------------------
+%%--------------------------------------------------------------------
+nginx_conf(ConfFile, Config)->
+    Protocol = ?config(protocol, Config),
+    file:write_file(ConfFile,
+		    [format_nginx_conf(nginx_global(Config)),
+		     format_nginx_conf(nginx_events(Config)),
+		     format_nginx_conf(nginx_http(Protocol, Config))]).
+       
+format_nginx_conf(Directives) ->
+    lists:map(fun({Key, Value}) ->
+			  io_lib:format("~s ~s;\n", [Key, Value]);
+		     (Str) ->
+			  Str    
+		  end, Directives).
+
+
+nginx_global(Config) ->
+    PrivDir = ?config(priv_dir, Config),
+    [{"pid", filename:join(PrivDir, "nginx.pid")},
+     {"error_log",  filename:join(PrivDir, "nginx.pid")},
+     {"worker_processes", "1"}].
+
+nginx_events(_Config) ->
+    ["events {\n",
+     {"worker_connections",  "1024"},
+     "\n}"
+    ].
+
+nginx_http("http", Config) ->
+    PrivDir = ?config(priv_dir, Config),
+    DataDir = ?config(data_dir, Config),
+    Port = ?config(port, Config),
+    ["http {\n" |
+     nginx_defaults(PrivDir) ++
+	 [" server {",
+	  {root,                DataDir}, 
+	  {listen,              integer_to_list(Port)},
+	  " location / {\n  try_files $uri $uri/ /index.html;\n}"
+	  "}\n", "}\n"
+	 ]
+    ];
+	
+nginx_http("https", Config) ->
+    PrivDir = ?config(priv_dir, Config),
+    DataDir = ?config(data_dir, Config),
+    Port = ?config(port, Config),
+    SSLOpts = ?config(server_verification_opts, Config),
+    Ciphers = proplists:get_value(ciphers, SSLOpts),
+    ReuseSession = ?config(reuse_sessions, Config),
+    ["http {" |
+     nginx_defaults(PrivDir) ++
+	 [" server {",
+	  {"root",                DataDir}, 
+	  {"listen",              integer_to_list(Port) ++ " ssl"},
+	  {"ssl_certificate",     ?config(certfile, SSLOpts)},
+	  {"ssl_certificate_key", ?config(keyfile, SSLOpts)},
+	  {"ssl_protocols",       "TLSv1 TLSv1.1 TLSv1.2"},
+	  {"ssl_ciphers",         Ciphers}, 
+	  {"ssl_session_cache",    nginx_reuse_session(ReuseSession)},
+	  " location / {\n  try_files $uri $uri/ /index.html;\n}"
+	  "}\n", "}\n"
+	 ]
+    ].
+	
+nginx_defaults(PrivDir) ->
+    [
+     %% Set temp and cache file options that will otherwise default to
+     %% restricted locations accessible only to root.
+     {"client_body_temp_path", filename:join(PrivDir, "client_body")},
+     {"fastcgi_temp_path",   filename:join(PrivDir, "fastcgi_temp")}, 
+     {"proxy_temp_path", filename:join(PrivDir, "proxy_temp")},
+     {"scgi_temp_path", filename:join(PrivDir, "scgi_temp")},
+     {"uwsgi_temp_path", filename:join(PrivDir, "uwsgi_temp_path")},
+     {"access_log",  filename:join(PrivDir, "access.log")},
+     {"error_log",   filename:join(PrivDir, "error.log")},
+     %% Standard options
+     {"sendfile", "on"},
+     {"tcp_nopush", "on"},
+     {"tcp_nodelay", "on"},
+     {"keepalive_timeout",  "360"},
+     {"types_hash_max_size", "2048"},
+     {"include", "/etc/nginx/mime.types"},
+     {"default_type", "application/octet-stream"}
+    ].
+
+nginx_reuse_session(true) ->
+    "on";
+nginx_reuse_session(false) ->
+    "off".
+
+wait_for_nginx_up(Host, Port) ->
+    case gen_tcp:connect(Host, Port, []) of
+	{ok, Socket} ->
+	    gen_tcp:close(Socket);
+	_  ->
+	    ct:sleep(100),
+	    wait_for_nginx_up(Host, Port)
+    end.
+		
diff --git a/lib/inets/test/httpd_bench_SUITE_data/1M_file b/lib/inets/test/httpd_bench_SUITE_data/1M_file
new file mode 100644
index 0000000000..557989144e
--- /dev/null
+++ b/lib/inets/test/httpd_bench_SUITE_data/1M_file
diff --git a/lib/inets/test/httpd_bench_SUITE_data/1k_file b/lib/inets/test/httpd_bench_SUITE_data/1k_file
new file mode 100644
index 0000000000..cade172d80
--- /dev/null
+++ b/lib/inets/test/httpd_bench_SUITE_data/1k_file
diff --git a/lib/inets/test/httpd_block.erl b/lib/inets/test/httpd_block.erl
deleted file mode 100644
index 45547e6d4e..0000000000
--- a/lib/inets/test/httpd_block.erl
+++ /dev/null
@@ -1,372 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2005-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-%%
-%%
--module(httpd_block).
-
--include_lib("common_test/include/ct.hrl").
-
-%% General testcases bodies called from httpd_SUITE
--export([block_disturbing_idle/4, block_non_disturbing_idle/4,
-	 block_503/4, block_disturbing_active/4, 
-	 block_non_disturbing_active/4, 
-	 block_disturbing_active_timeout_not_released/4, 
-	 block_disturbing_active_timeout_released/4, 
-	 block_non_disturbing_active_timeout_not_released/4,
-	 block_non_disturbing_active_timeout_released/4,
-	 disturbing_blocker_dies/4,
-	 non_disturbing_blocker_dies/4, restart_no_block/4,
-	 restart_disturbing_block/4, restart_non_disturbing_block/4
-	]).
-
-%% Help functions 
--export([httpd_block/3, httpd_block/4, httpd_unblock/2, httpd_restart/2]).
--export([do_block_server/4, do_block_nd_server/5, do_long_poll/6]).
-
--define(report(Label, Content), 
-	inets:report_event(20, Label, test_case, 
-			   [{module, ?MODULE}, {line, ?LINE} | Content])).
-
-
-%%-------------------------------------------------------------------------
-%% Test cases starts here.
-%%-------------------------------------------------------------------------
-block_disturbing_idle(_Type, Port, Host, Node) ->
-    io:format("block_disturbing_idle -> entry~n", []),
-    validate_admin_state(Node, Host, Port, unblocked),
-    block_server(Node, Host, Port),
-    validate_admin_state(Node, Host, Port, blocked),
-    unblock_server(Node, Host, Port),
-    validate_admin_state(Node, Host, Port, unblocked),
-    io:format("block_disturbing_idle -> done~n", []),
-    ok.
-
-%%--------------------------------------------------------------------
-block_non_disturbing_idle(_Type, Port, Host, Node) ->
-    unblocked = get_admin_state(Node, Host, Port),
-    block_nd_server(Node, Host, Port),
-    blocked = get_admin_state(Node, Host, Port),
-    unblock_server(Node, Host, Port),
-    unblocked = get_admin_state(Node, Host, Port),
-    ok.
-
-%%--------------------------------------------------------------------
-block_503(Type, Port, Host, Node) ->
-    Req = "GET / HTTP/1.0\r\ndummy-host.ericsson.se:\r\n\r\n",
-    unblocked = get_admin_state(Node, Host, Port),
-    ok = httpd_test_lib:verify_request(Type, Host, Port, Node, Req, 
-				  [{statuscode, 200},
-				   {version, "HTTP/1.0"}]),
-    ok = block_server(Node, Host, Port),
-    blocked = get_admin_state(Node, Host, Port),
-    ok = httpd_test_lib:verify_request(Type, Host, Port, Node, Req,  
-				  [{statuscode, 503},
-				   {version, "HTTP/1.0"}]),
-    ok = unblock_server(Node, Host, Port),
-    unblocked = get_admin_state(Node, Host, Port),
-    ok = httpd_test_lib:verify_request(Type, Host, Port, Node, Req, 
-				  [{statuscode, 200},
-				   {version, "HTTP/1.0"}]).
-
-%%--------------------------------------------------------------------
-block_disturbing_active(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Pid = long_poll(Type, Host, Port, Node, 200, 60000),
-    ct:sleep(15000),
-    block_server(Node, Host, Port),
-    await_suite_failed_process_exit(Pid, "poller", 60000,
-				    connection_closed),
-    blocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-
-%%--------------------------------------------------------------------
-block_non_disturbing_active(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Poller = long_poll(Type, Host, Port, Node, 200, 60000),
-    ct:sleep(15000),
-    ok = block_nd_server(Node, Host, Port),
-    await_normal_process_exit(Poller, "poller", 60000),
-    blocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-
-%%--------------------------------------------------------------------
-block_disturbing_active_timeout_not_released(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Poller = long_poll(Type, Host, Port, Node, 200, 60000),
-    ct:sleep(15000),
-    ok = httpd_block(undefined,  Port, disturbing, 50000),
-    await_normal_process_exit(Poller, "poller", 30000),
-    blocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-
-%%--------------------------------------------------------------------
-block_disturbing_active_timeout_released(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Poller = long_poll(Type, Host, Port, Node, 200, 40000),
-    ct:sleep(5000),
-    ok = httpd_block(undefined,  Port, disturbing, 10000),
-    await_suite_failed_process_exit(Poller, "poller", 40000, 
-					  connection_closed),
-    blocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-%%--------------------------------------------------------------------
-block_non_disturbing_active_timeout_not_released(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Poller = long_poll(Type, Host, Port, Node, 200, 60000),
-    ct:sleep(5000),
-    ok = block_nd_server(Node, Host, Port, 40000),
-    await_normal_process_exit(Poller, "poller", 60000),
-    blocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-
-%%--------------------------------------------------------------------
-block_non_disturbing_active_timeout_released(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Poller = long_poll(Type, Host, Port, Node, 200, 45000),
-    ct:sleep(5000),
-    Blocker = blocker_nd(Node, Host, Port ,10000, {error,timeout}),
-    await_normal_process_exit(Blocker, "blocker", 15000),
-    await_normal_process_exit(Poller, "poller", 50000),
-    unblocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-%%--------------------------------------------------------------------
-disturbing_blocker_dies(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Poller = long_poll(Type, Host, Port, Node, 200, 60000),
-    ct:sleep(5000),
-    Blocker = blocker(Node, Host, Port, 10000),
-    ct:sleep(5000),
-    exit(Blocker,simulate_blocker_crash),
-    await_normal_process_exit(Poller, "poller", 60000),
-    unblocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-
-%%--------------------------------------------------------------------
-non_disturbing_blocker_dies(Type, Port, Host, Node) ->
-    process_flag(trap_exit, true),
-    Poller = long_poll(Type, Host, Port, Node, 200, 60000),
-    ct:sleep(5000),  
-    Blocker = blocker_nd(Node, Host, Port, 10000, ok),
-    ct:sleep(5000),
-    exit(Blocker, simulate_blocker_crash),
-    await_normal_process_exit(Poller, "poller", 60000),
-    unblocked = get_admin_state(Node, Host, Port),
-    process_flag(trap_exit, false),
-    ok.
-%%--------------------------------------------------------------------
-restart_no_block(_, Port, Host, Node) ->
-    {error,_Reason} = restart_server(Node, Host, Port).
-
-%%--------------------------------------------------------------------
-restart_disturbing_block(_, Port, Host, Node) ->
-    ?report("restart_disturbing_block - get_admin_state (unblocked)", []),
-    unblocked = get_admin_state(Node, Host, Port),
-    ?report("restart_disturbing_block - block_server", []),
-    ok = block_server(Node, Host, Port),
-    ?report("restart_disturbing_block - restart_server", []),
-    ok = restart_server(Node, Host, Port),
-    ?report("restart_disturbing_block - unblock_server", []),
-    ok = unblock_server(Node, Host, Port),
-    ?report("restart_disturbing_block - get_admin_state (unblocked)", []),
-    unblocked = get_admin_state(Node, Host, Port).
-
-%%--------------------------------------------------------------------
-restart_non_disturbing_block(_, Port, Host, Node) ->
-    ?report("restart_non_disturbing_block - get_admin_state (unblocked)", []),
-    unblocked = get_admin_state(Node, Host, Port),
-    ?report("restart_non_disturbing_block - block_nd_server", []),
-    ok = block_nd_server(Node, Host, Port),
-    ?report("restart_non_disturbing_block - restart_server", []),
-    ok = restart_server(Node, Host, Port),
-    ?report("restart_non_disturbing_block - unblock_server", []),
-    ok = unblock_server(Node, Host, Port),
-    ?report("restart_non_disturbing_block - get_admin_state (unblocked)", []),
-    unblocked = get_admin_state(Node, Host, Port).
-
-%%--------------------------------------------------------------------
-%% Internal functions
-%%--------------------------------------------------------------------
-blocker(Node, Host, Port, Timeout) ->
-    spawn_link(?MODULE, do_block_server,[Node, Host, Port,Timeout]).
-
-do_block_server(Node, Host, Port, Timeout) ->
-    ok = block_server(Node, Host, Port, Timeout),
-    exit(normal).
-
-blocker_nd(Node, Host, Port, Timeout, Reply) ->
-    spawn_link(?MODULE, do_block_nd_server,
-	       [Node, Host, Port, Timeout, Reply]).
-
-do_block_nd_server(Node, Host, Port, Timeout, Reply) ->
-    Reply = block_nd_server(Node, Host, Port, Timeout),
-    exit(normal).
-
-restart_server(Node, _Host, Port) ->
-    Addr = undefined, 
-    rpc:call(Node, ?MODULE, httpd_restart, [Addr, Port]).
-
-
-block_server(Node, _Host,  Port) ->
-    io:format("block_server -> entry~n", []),    
-    Addr = undefined, 
-    rpc:call(Node, ?MODULE, httpd_block, [Addr, Port, disturbing]).
-
-
-block_server(Node, _Host, Port, Timeout) ->
-    Addr = undefined, 
-    rpc:call(Node, ?MODULE, httpd_block, [Addr, Port, disturbing, Timeout]).
-
-
-block_nd_server(Node, _Host, Port) ->
-    Addr = undefined, 
-    rpc:call(Node, ?MODULE, httpd_block, [Addr, Port, non_disturbing]).
-
-block_nd_server(Node, _Host, Port, Timeout) ->
-    Addr = undefined, 
-    rpc:call(Node, ?MODULE, httpd_block, [Addr, Port, non_disturbing, Timeout]).
-
-unblock_server(Node, _Host, Port) ->
-    io:format("~p:~p:block_server -> entry~n", [node(),self()]),    
-    Addr = undefined, 
-    rpc:call(Node, ?MODULE, httpd_unblock, [Addr, Port]).
-
-
-httpd_block(Addr, Port, Mode) ->
-    io:format("~p:~p:httpd_block -> entry~n", [node(),self()]), 
-    Name = make_name(Addr, Port),
-    case whereis(Name) of
-	Pid when is_pid(Pid) ->
-	    httpd_manager:block(Pid, Mode);
-	_ ->
-	    {error, not_started}
-    end.
-    
-httpd_block(Addr, Port, Mode, Timeout) ->
-    Name = make_name(Addr, Port),
-    case whereis(Name) of
-	Pid when is_pid(Pid) ->
-	    httpd_manager:block(Pid, Mode, Timeout);
-	_ ->
-	    {error, not_started}
-    end.
-    
-httpd_unblock(Addr, Port) ->
-    io:format("~p:~p:httpd_unblock -> entry~n", [node(),self()]), 
-    Name = make_name(Addr, Port),
-    case whereis(Name) of
-	Pid when is_pid(Pid) ->
-	    httpd_manager:unblock(Pid);
-	_ ->
-	    {error, not_started}
-    end.
-    
-httpd_restart(Addr, Port) ->
-    Name = make_name(Addr, Port),
-    case whereis(Name) of
-	Pid when is_pid(Pid) ->
-	    httpd_manager:reload(Pid, undefined);
-	_ ->
-	    {error, not_started}
-    end.
-    
-make_name(Addr, Port) ->
-    httpd_util:make_name("httpd", Addr, Port, default).
-
-get_admin_state(_, _Host, Port) ->
-    Name = make_name(undefined, Port),
-    {status, _, _, StatusInfo} = sys:get_status(whereis(Name)),
-    [_, _,_, _, Prop] = StatusInfo,
-    State = state(Prop),
-    element(6, State).
-
-validate_admin_state(Node, Host, Port, Expect) ->
-    io:format("try validating server admin state: ~p~n", [Expect]),
-    case get_admin_state(Node, Host, Port) of
-	Expect ->
-	    ok;
-	Unexpected ->
-	    io:format("failed validating server admin state: ~p~n", 
-		      [Unexpected]),
-	    exit({unexpected_admin_state, Unexpected, Expect})
-    end.
-
-
-await_normal_process_exit(Pid, Name, Timeout) ->
-    receive
-	{'EXIT', Pid, normal} ->
-	    ok;
-	{'EXIT', Pid, Reason} ->
-	    Err = 
-		lists:flatten(
-		  io_lib:format("expected normal exit, "
-				"unexpected exit of ~s process: ~p",
-				[Name, Reason])),
-	    ct:fail(Err)
-    after Timeout ->
-	    ct:fail("timeout while waiting for " ++ Name)
-    end.
-
-
-await_suite_failed_process_exit(Pid, Name, Timeout, Why) ->
-    receive 
-	{'EXIT', Pid, {test_failed, Why}} ->
-	    ok;
-	{'EXIT', Pid, Reason} ->
-	    Err = 
-		lists:flatten(
-		  io_lib:format("expected connection_closed, "
-				"unexpected exit of ~s process: ~p",
-				[Name, Reason])),
-	    ct:fail(Err)
-    after Timeout ->
-	    ct:fail("timeout while waiting for " ++ Name)
-    end.
-	  
-long_poll(Type, Host, Port, Node, StatusCode, Timeout) ->
-    spawn_link(?MODULE, do_long_poll, [Type, Host, Port, Node, 
-				       StatusCode, Timeout]).
-
-do_long_poll(Type, Host, Port, Node, StatusCode, Timeout) ->
-    Mod  = "httpd_example",
-    Func = "delay",
-    Req  = lists:flatten(io_lib:format("GET /eval?" ++ Mod ++ ":" ++ Func ++ 
-				       "(~p) HTTP/1.0\r\n\r\n",[30000])),
-    case httpd_test_lib:verify_request(Type, Host, Port, Node, Req, 
-			      [{statuscode, StatusCode},
-			       {version, "HTTP/1.0"}], Timeout) of
-	ok ->
-	    exit(normal);
-	Reason ->
-	    exit({test_failed, Reason})
-    end.
-
-
-state([{data,[{"State", State}]} | _]) ->
-    State;
-state([{data,[{"StateData", State}]} | _]) ->
-    State;
-state([_ | Rest]) ->
-    state(Rest).
diff --git a/lib/inets/test/httpd_mod.erl b/lib/inets/test/httpd_mod.erl
index d9118aa1a4..2035b50248 100644
--- a/lib/inets/test/httpd_mod.erl
+++ b/lib/inets/test/httpd_mod.erl
@@ -779,9 +779,14 @@ esi(Type, Port, Host, Node) ->
 				       [{statuscode, 200},
 					{no_header, "cache-control"},
 					{version, "HTTP/1.0"}]),
+    ok = httpd_test_lib:verify_request(Type, Host, Port, Node,
+				       "GET /cgi-bin/erl/httpd_example:new_status_and_location"
+				       " HTTP/1.1\r\n\r\n",
+				       [{statuscode, 201},
+                                        {header, "Location"},
+					{version, "HTTP/1.1"}]),
     ok.
 
-
 %%--------------------------------------------------------------------
 get(Type, Port, Host, Node) ->
     ok = httpd_test_lib:verify_request(Type, Host, Port, Node,
diff --git a/lib/inets/test/httpd_test_lib.erl b/lib/inets/test/httpd_test_lib.erl
index 1cecd2642c..b6525037b2 100644
--- a/lib/inets/test/httpd_test_lib.erl
+++ b/lib/inets/test/httpd_test_lib.erl
@@ -23,7 +23,8 @@
 -include("inets_test_lib.hrl").
 
 %% Poll functions
--export([verify_request/6, verify_request/7, verify_request/8, is_expect/1]).
+-export([verify_request/6, verify_request/7, verify_request/8, is_expect/1,
+	 verify_request_N/9]).
 
 -record(state, {request,        % string()
 		socket,         % socket()
@@ -109,9 +110,9 @@ verify_request(SocketType, Host, Port, TranspOpts, Node, RequestStr, Options, Ti
 		    {error, Reason};
 		NewState ->
 		    ValidateResult = 
-			validate(RequestStr, NewState, Options, Node, Port),
+		   	validate(RequestStr, NewState, Options, Node, Port),
 		    inets_test_lib:close(SocketType, Socket),
-		    ValidateResult
+		    ValidateResult 
 	    end;
 
 	ConnectError ->
@@ -126,6 +127,46 @@ verify_request(SocketType, Host, Port, TranspOpts, Node, RequestStr, Options, Ti
 		      {args,       [SocketType, Host, Port, TranspOpts]}]}) 
     end.
 
+verify_request_N(SocketType, Host, Port, TranspOpts, Node, RequestStr, Options, TimeOut, N) ->
+    State = #state{},
+     try inets_test_lib:connect_bin(SocketType, Host, Port, TranspOpts) of
+	{ok, Socket} ->
+	     request_N(SocketType, Socket, RequestStr, Options, TimeOut, Node, Port, State, N); 
+	ConnectError ->
+	    ct:fail({connect_error, ConnectError, 
+		     [SocketType, Host, Port, TranspOpts]})
+    catch
+	T:E ->
+	    ct:fail({connect_failure, 
+		     [{type,       T}, 
+		      {error,      E}, 
+		      {stacktrace, erlang:get_stacktrace()}, 
+		      {args,       [SocketType, Host, Port, TranspOpts]}]}) 
+    end.
+
+request_N(SocketType, Socket, RequestStr, Options, TimeOut, Node, Port, State, 0) ->
+    ok = inets_test_lib:send(SocketType, Socket, RequestStr),
+    case request(State#state{request = RequestStr, 
+			     socket  = Socket}, TimeOut) of
+	{error, Reason} ->
+	    {error, Reason};	
+	NewState ->
+	    ValidateResult = 
+		validate(RequestStr, NewState, Options, Node, Port),
+	    inets_test_lib:close(SocketType, Socket),
+	    ValidateResult
+    end;
+request_N(SocketType, Socket, RequestStr, Options, TimeOut, Node, Port, State, N) ->
+    ok = inets_test_lib:send(SocketType, Socket, RequestStr),
+    case request(State#state{request = RequestStr, 
+			     socket  = Socket}, TimeOut) of
+	{error, Reason} ->
+	    {error, Reason};
+	_NewState ->
+	    request_N(SocketType, Socket, RequestStr, Options, TimeOut, Node, Port, 
+		      #state{}, N-1)
+    end.
+
 request(#state{mfa = {Module, Function, Args}, 
 	       request = RequestStr, socket = Socket} = State, TimeOut) ->
             
@@ -160,13 +201,35 @@ request(#state{mfa = {Module, Function, Args},
 	{ssl_closed, Socket} ->
 	    exit({test_failed, connection_closed});
 	{ssl_error, Socket, Reason} ->
-	    ct:fail({ssl_error, Reason})
+	    ct:fail({ssl_error, Reason});
+	{Socket, {data, Data}} when is_port(Socket) ->
+	    case Module:Function([list_to_binary(Data) | Args]) of
+		{ok, Parsed} ->
+		    port_handle_http_msg(Parsed, State); 
+		{_, whole_body, _} when HeadRequest =:= "HEAD" ->
+		    State#state{body = <<>>}; 
+		NewMFA ->
+		    request(State#state{mfa = NewMFA}, TimeOut)
+	    end;
+	{Socket, closed}  when Function =:= whole_body -> 
+	    State#state{body = hd(Args)};
+	{Socket, closed} ->
+	    exit({test_failed, connection_closed})
     after TimeOut ->
 	    ct:pal("~p ~w[~w]request -> timeout"
-		   "~n", [self(), ?MODULE, ?LINE]),
+		   "~p~n", [self(), ?MODULE, ?LINE, Args]),
 	    ct:fail(connection_timed_out)    
     end.
 
+
+port_handle_http_msg({Version, StatusCode, ReasonPharse, Headers, Body}, State) ->
+    State#state{status_line = {Version, 
+			       StatusCode,
+			       ReasonPharse},
+		headers = Headers,
+		body = Body}.
+
+
 handle_http_msg({Version, StatusCode, ReasonPharse, Headers, Body}, 
 		State = #state{request = RequestStr}) ->
     case is_expect(RequestStr) of
diff --git a/lib/inets/test/inets.spec b/lib/inets/test/inets.spec
index ed102f8219..6cb3d6526c 100644
--- a/lib/inets/test/inets.spec
+++ b/lib/inets/test/inets.spec
@@ -1 +1,3 @@
-{suites,"../inets_test",all}.
+{suites,"../inets_test", all}.
+{skip_suites, "../inets_test", [httpd_bench_SUITE], 
+    "Benchmarks run separately"}.
diff --git a/lib/inets/test/inets_SUITE.erl b/lib/inets/test/inets_SUITE.erl
index 38b8229389..1abd96a228 100644
--- a/lib/inets/test/inets_SUITE.erl
+++ b/lib/inets/test/inets_SUITE.erl
@@ -213,7 +213,6 @@ start_httpd(Config) when is_list(Config) ->
     true = lists:member(Pid0, Pids0),
     [_|_] = inets:services_info(),	
     inets:stop(httpd, Pid0),
-    ct:sleep(500),
     Pids1 =  [ServicePid || {_, ServicePid} <- inets:services()],
     false = lists:member(Pid0, Pids1),
     {ok, Pid0b} =
@@ -222,7 +221,6 @@ start_httpd(Config) when is_list(Config) ->
     true = lists:member(Pid0b, Pids0b),
     [_|_] = inets:services_info(),
     inets:stop(httpd, Pid0b),
-    ct:sleep(500),
     Pids1 =  [ServicePid || {_, ServicePid} <- inets:services()], 
     false = lists:member(Pid0b, Pids1),
     {ok, Pid1} = 
diff --git a/lib/inets/test/inets_bench.spec b/lib/inets/test/inets_bench.spec
new file mode 100644
index 0000000000..19136e691b
--- /dev/null
+++ b/lib/inets/test/inets_bench.spec
@@ -0,0 +1 @@
+{suites,"../inets_test",[httpd_bench_SUITE]}.
diff --git a/lib/inets/test/inets_test_lib.erl b/lib/inets/test/inets_test_lib.erl
index f1185f7574..2529cc5f9b 100644
--- a/lib/inets/test/inets_test_lib.erl
+++ b/lib/inets/test/inets_test_lib.erl
@@ -463,8 +463,9 @@ connect_bin(essl, Host, Port, Opts0) ->
     connect(ssl, Host, Port, Opts);
 connect_bin(ip_comm, Host, Port, Opts0) ->
     Opts = [binary, {packet, 0} | Opts0],
-    connect(ip_comm, Host, Port, Opts).
-
+    connect(ip_comm, Host, Port, Opts);
+connect_bin(Type, Host, Port, Opts) ->
+    connect(Type, Host, Port, Opts).
 
 connect_byte(SockType, Host, Port) ->
     connect_byte(SockType, Host, Port, []).
@@ -477,27 +478,40 @@ connect_byte(essl, Host, Port, Opts0) ->
     connect(ssl, Host, Port, Opts);
 connect_byte(ip_comm, Host, Port, Opts0) ->
     Opts = [{packet,0} | Opts0],
-    connect(ip_comm, Host, Port, Opts).
+    connect(ip_comm, Host, Port, Opts);
+connect_byte(Type, Host, Port, Opts) ->
+    connect(Type, Host, Port, Opts).
 
 connect(ip_comm, Host, Port, Opts) ->
     gen_tcp:connect(Host, Port, Opts);
 connect(ssl, Host, Port, Opts) ->
-    ssl:connect(Host, Port, Opts).
+    ssl:connect(Host, Port, Opts);
+connect(openssl_port, Host, Port, Opts) ->
+    CaCertFile = proplists:get_value(cacertfile, Opts),
+    Cmd = "openssl s_client -quiet -port " ++ integer_to_list(Port)  ++ " -host " ++ Host 
+	++ " -CAfile " ++ CaCertFile,
+    ct:log("openssl cmd: ~p~n", [Cmd]),
+    OpensslPort =  open_port({spawn, Cmd}, [stderr_to_stdout]),
+    read_junk(OpensslPort),
+    {ok, OpensslPort}.
 
 send(ssl, Socket, Data) ->
     ssl:send(Socket, Data);
 send(essl, Socket, Data) ->
     ssl:send(Socket, Data);
 send(ip_comm,Socket,Data) ->
-    gen_tcp:send(Socket,Data).
-
-
+    gen_tcp:send(Socket,Data);
+send(openssl_port, Port, Data) ->
+    true = port_command(Port, Data),
+    ok.
 close(ssl,Socket) ->
     catch ssl:close(Socket);
 close(essl,Socket) ->
     catch ssl:close(Socket);
 close(ip_comm,Socket) ->
-    catch gen_tcp:close(Socket).
+    catch gen_tcp:close(Socket);
+close(openssl_port, Port) ->
+    exit(Port, normal).
 
 
 hours(N)   -> trunc(N * 1000 * 60 * 60).
@@ -572,3 +586,11 @@ do_inet_port(Node) ->
     {ok, Socket} = rpc:call(Node, gen_tcp, listen, [0, [{reuseaddr, true}]]),
     {ok, Port} = rpc:call(Node, inet, port, [Socket]),
     {Port, Socket}.
+
+read_junk(OpensslPort) ->
+    receive
+	{OpensslPort, _} ->
+	    read_junk(OpensslPort)
+    after 500 -> 
+	    ok    
+    end.
diff --git a/lib/inets/test/make_certs.erl b/lib/inets/test/make_certs.erl
new file mode 100644
index 0000000000..7215a59823
--- /dev/null
+++ b/lib/inets/test/make_certs.erl
@@ -0,0 +1,530 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2007-2015. All Rights Reserved.
+%% 
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%% 
+%% %CopyrightEnd%
+%%
+
+-module(make_certs).
+-compile([export_all]).
+
+%-export([all/1, all/2, rootCA/2, intermediateCA/3, endusers/3, enduser/3, revoke/3, gencrl/2, verify/3]).
+
+-record(config, {commonName, 
+	     organizationalUnitName = "Erlang OTP",
+	     organizationName = "Ericsson AB",
+	     localityName = "Stockholm",
+	     countryName = "SE",
+	     emailAddress = "[email protected]",
+	     default_bits = 2048,
+	     v2_crls = true,
+	     ecc_certs = false,
+	     issuing_distribution_point = false,
+	     crl_port = 8000,
+	     openssl_cmd = "openssl"}).
+
+
+default_config() ->
+    #config{}.
+
+make_config(Args) ->
+    make_config(Args, #config{}).
+
+make_config([], C) ->
+    C;
+make_config([{organizationalUnitName, Name}|T], C) when is_list(Name) ->
+    make_config(T, C#config{organizationalUnitName = Name});
+make_config([{organizationName, Name}|T], C) when is_list(Name) ->
+    make_config(T, C#config{organizationName = Name});
+make_config([{localityName, Name}|T], C) when is_list(Name) ->
+    make_config(T, C#config{localityName = Name});
+make_config([{countryName, Name}|T], C) when is_list(Name) ->
+    make_config(T, C#config{countryName = Name});
+make_config([{emailAddress, Name}|T], C) when is_list(Name) ->
+    make_config(T, C#config{emailAddress = Name});
+make_config([{default_bits, Bits}|T], C) when is_integer(Bits) ->
+    make_config(T, C#config{default_bits = Bits});
+make_config([{v2_crls, Bool}|T], C) when is_boolean(Bool) ->
+    make_config(T, C#config{v2_crls = Bool});
+make_config([{crl_port, Port}|T], C) when is_integer(Port) ->
+    make_config(T, C#config{crl_port = Port});
+make_config([{ecc_certs, Bool}|T], C) when is_boolean(Bool) ->
+    make_config(T, C#config{ecc_certs = Bool});
+make_config([{issuing_distribution_point, Bool}|T], C) when is_boolean(Bool) ->
+    make_config(T, C#config{issuing_distribution_point = Bool});
+make_config([{openssl_cmd, Cmd}|T], C) when is_list(Cmd) ->
+    make_config(T, C#config{openssl_cmd = Cmd}).
+
+
+all([DataDir, PrivDir]) ->
+    all(DataDir, PrivDir).
+
+all(DataDir, PrivDir) ->
+    all(DataDir, PrivDir, #config{}).
+
+all(DataDir, PrivDir, C) when is_list(C) ->
+    all(DataDir, PrivDir, make_config(C));
+all(DataDir, PrivDir, C = #config{}) ->
+    ok = filelib:ensure_dir(filename:join(PrivDir, "erlangCA")),
+    create_rnd(DataDir, PrivDir),			% For all requests
+    rootCA(PrivDir, "erlangCA", C),
+    intermediateCA(PrivDir, "otpCA", "erlangCA", C),
+    endusers(PrivDir, "otpCA", ["client", "server", "revoked", "a.server", "b.server"], C),
+    endusers(PrivDir, "erlangCA", ["localhost"], C),
+    %% Create keycert files 
+    SDir = filename:join([PrivDir, "server"]),
+    SC = filename:join([SDir, "cert.pem"]),
+    SK = filename:join([SDir, "key.pem"]),
+    SKC = filename:join([SDir, "keycert.pem"]),
+    append_files([SK, SC], SKC),
+    CDir = filename:join([PrivDir, "client"]),
+    CC = filename:join([CDir, "cert.pem"]),
+    CK = filename:join([CDir, "key.pem"]),
+    CKC = filename:join([CDir, "keycert.pem"]),
+    append_files([CK, CC], CKC),
+    RDir = filename:join([PrivDir, "revoked"]),
+    RC = filename:join([RDir, "cert.pem"]),
+    RK = filename:join([RDir, "key.pem"]),
+    RKC = filename:join([RDir, "keycert.pem"]),
+    revoke(PrivDir, "otpCA", "revoked", C),
+    append_files([RK, RC], RKC),
+    remove_rnd(PrivDir),
+    {ok, C}.
+
+append_files(FileNames, ResultFileName) ->
+    {ok, ResultFile} = file:open(ResultFileName, [write]),
+    do_append_files(FileNames, ResultFile).
+
+do_append_files([], RF) ->
+    ok = file:close(RF);
+do_append_files([F|Fs], RF) ->
+    {ok, Data} = file:read_file(F),
+    ok = file:write(RF, Data),
+    do_append_files(Fs, RF).
+
+rootCA(Root, Name, C) ->
+    create_ca_dir(Root, Name, ca_cnf(C#config{commonName = Name})),
+    create_self_signed_cert(Root, Name, req_cnf(C#config{commonName = Name}), C),
+    file:copy(filename:join([Root, Name, "cert.pem"]), filename:join([Root, Name, "cacerts.pem"])),
+    gencrl(Root, Name, C).
+
+intermediateCA(Root, CA, ParentCA, C) ->
+    create_ca_dir(Root, CA, ca_cnf(C#config{commonName = CA})),
+    CARoot = filename:join([Root, CA]),
+    CnfFile = filename:join([CARoot, "req.cnf"]),
+    file:write_file(CnfFile, req_cnf(C#config{commonName = CA})),
+    KeyFile = filename:join([CARoot, "private", "key.pem"]), 
+    ReqFile =  filename:join([CARoot, "req.pem"]), 
+    create_req(Root, CnfFile, KeyFile, ReqFile, C),
+    CertFile = filename:join([CARoot, "cert.pem"]),
+    sign_req(Root, ParentCA, "ca_cert", ReqFile, CertFile, C),
+    CACertsFile = filename:join(CARoot, "cacerts.pem"),
+    file:copy(filename:join([Root, ParentCA, "cacerts.pem"]), CACertsFile),
+    %% append this CA's cert to the cacerts file
+    {ok, Bin} = file:read_file(CertFile),
+    {ok, FD} = file:open(CACertsFile, [append]),
+    file:write(FD, ["\n", Bin]),
+    file:close(FD),
+    gencrl(Root, CA, C).
+
+endusers(Root, CA, Users, C) ->
+    [enduser(Root, CA, User, C) || User <- Users].
+
+enduser(Root, CA, User, C) ->
+    UsrRoot = filename:join([Root, User]),
+    file:make_dir(UsrRoot),
+    CnfFile = filename:join([UsrRoot, "req.cnf"]),
+    file:write_file(CnfFile, req_cnf(C#config{commonName = User})),
+    KeyFile = filename:join([UsrRoot, "key.pem"]), 
+    ReqFile =  filename:join([UsrRoot, "req.pem"]), 
+    create_req(Root, CnfFile, KeyFile, ReqFile, C),
+    %create_req(Root, CnfFile, KeyFile, ReqFile),
+    CertFileAllUsage =  filename:join([UsrRoot, "cert.pem"]),
+    sign_req(Root, CA, "user_cert", ReqFile, CertFileAllUsage, C),
+    CertFileDigitalSigOnly =  filename:join([UsrRoot, "digital_signature_only_cert.pem"]),
+    sign_req(Root, CA, "user_cert_digital_signature_only", ReqFile, CertFileDigitalSigOnly, C),
+    CACertsFile = filename:join(UsrRoot, "cacerts.pem"),
+    file:copy(filename:join([Root, CA, "cacerts.pem"]), CACertsFile),
+    ok.
+
+revoke(Root, CA, User, C) ->
+    UsrCert = filename:join([Root, User, "cert.pem"]),
+    CACnfFile = filename:join([Root, CA, "ca.cnf"]),
+    Cmd = [C#config.openssl_cmd, " ca"
+	   " -revoke ", UsrCert,
+	   [" -crl_reason keyCompromise" || C#config.v2_crls ],
+	   " -config ", CACnfFile],
+    Env = [{"ROOTDIR", filename:absname(Root)}], 
+    cmd(Cmd, Env),
+    gencrl(Root, CA, C).
+
+gencrl(Root, CA, C) ->
+    CACnfFile = filename:join([Root, CA, "ca.cnf"]),
+    CACRLFile = filename:join([Root, CA, "crl.pem"]),
+    Cmd = [C#config.openssl_cmd, " ca"
+	   " -gencrl ",
+	   " -crlhours 24",
+	   " -out ", CACRLFile,
+	   " -config ", CACnfFile],
+    Env = [{"ROOTDIR", filename:absname(Root)}], 
+    cmd(Cmd, Env).
+
+verify(Root, CA, User, C) ->
+    CAFile = filename:join([Root, User, "cacerts.pem"]),
+    CACRLFile = filename:join([Root, CA, "crl.pem"]),
+    CertFile = filename:join([Root, User, "cert.pem"]),
+    Cmd = [C#config.openssl_cmd, " verify"
+	   " -CAfile ", CAFile,
+	   " -CRLfile ", CACRLFile, %% this is undocumented, but seems to work
+	   " -crl_check ",
+	   CertFile],
+    Env = [{"ROOTDIR", filename:absname(Root)}],
+    try cmd(Cmd, Env) catch
+	   exit:{eval_cmd, _, _} ->
+		invalid
+    end.
+
+create_self_signed_cert(Root, CAName, Cnf, C = #config{ecc_certs = true}) ->
+    CARoot = filename:join([Root, CAName]),
+    CnfFile = filename:join([CARoot, "req.cnf"]),
+    file:write_file(CnfFile, Cnf),
+    KeyFile = filename:join([CARoot, "private", "key.pem"]), 
+    CertFile = filename:join([CARoot, "cert.pem"]), 
+    Cmd = [C#config.openssl_cmd, " ecparam"
+	   " -out ", KeyFile,
+	   " -name secp521r1 ",
+	   %" -name sect283k1 ",
+	   " -genkey "],
+    Env = [{"ROOTDIR", filename:absname(Root)}], 
+    cmd(Cmd, Env),
+
+    Cmd2 = [C#config.openssl_cmd, " req"
+	   " -new"
+	   " -x509"
+	   " -config ", CnfFile,
+	   " -key ", KeyFile, 
+		 " -outform PEM ",
+	   " -out ", CertFile], 
+    cmd(Cmd2, Env);
+create_self_signed_cert(Root, CAName, Cnf, C) ->
+    CARoot = filename:join([Root, CAName]),
+    CnfFile = filename:join([CARoot, "req.cnf"]),
+    file:write_file(CnfFile, Cnf),
+    KeyFile = filename:join([CARoot, "private", "key.pem"]), 
+    CertFile = filename:join([CARoot, "cert.pem"]), 
+    Cmd = [C#config.openssl_cmd, " req"
+	   " -new"
+	   " -x509"
+	   " -config ", CnfFile,
+	   " -keyout ", KeyFile,
+	   " -outform PEM",
+	   " -out ", CertFile], 
+    Env = [{"ROOTDIR", filename:absname(Root)}],  
+    cmd(Cmd, Env).
+
+
+create_ca_dir(Root, CAName, Cnf) ->
+    CARoot = filename:join([Root, CAName]),
+    ok = filelib:ensure_dir(CARoot),
+    file:make_dir(CARoot),
+    create_dirs(CARoot, ["certs", "crl", "newcerts", "private"]),
+    create_rnd(Root, filename:join([CAName, "private"])),
+    create_files(CARoot, [{"serial", "01\n"},
+			  {"crlnumber", "01"},
+			  {"index.txt", ""},
+			  {"ca.cnf", Cnf}]).
+
+create_req(Root, CnfFile, KeyFile, ReqFile, C = #config{ecc_certs = true}) ->
+    Cmd = [C#config.openssl_cmd, " ecparam"
+	   " -out ", KeyFile,
+	   " -name secp521r1 ",
+	   %" -name sect283k1 ",
+	   " -genkey "],
+    Env = [{"ROOTDIR", filename:absname(Root)}], 
+    cmd(Cmd, Env),
+    Cmd2 = [C#config.openssl_cmd, " req"
+	   " -new ",
+	   " -key ", KeyFile,
+	   " -outform PEM ",
+	   " -out ", ReqFile,
+	   " -config ", CnfFile],
+    cmd(Cmd2, Env);
+    %fix_key_file(KeyFile).
+create_req(Root, CnfFile, KeyFile, ReqFile, C) ->
+    Cmd = [C#config.openssl_cmd, " req"
+	   " -new"
+	   " -config ", CnfFile,
+	   " -outform PEM ",
+	   " -keyout ", KeyFile, 
+	   " -out ", ReqFile], 
+    Env = [{"ROOTDIR", filename:absname(Root)}], 
+    cmd(Cmd, Env).
+    %fix_key_file(KeyFile).
+
+
+sign_req(Root, CA, CertType, ReqFile, CertFile, C) ->
+    CACnfFile = filename:join([Root, CA, "ca.cnf"]),
+    Cmd = [C#config.openssl_cmd, " ca"
+	   " -batch"
+	   " -notext"
+	   " -config ", CACnfFile, 
+	   " -extensions ", CertType,
+	   " -in ", ReqFile, 
+	   " -out ", CertFile],
+    Env = [{"ROOTDIR", filename:absname(Root)}], 
+    cmd(Cmd, Env).
+    
+%%
+%%  Misc
+%%
+    
+create_dirs(Root, Dirs) ->
+    lists:foreach(fun(Dir) ->
+			  file:make_dir(filename:join([Root, Dir])) end,
+		  Dirs).
+
+create_files(Root, NameContents) ->
+    lists:foreach(
+      fun({Name, Contents}) ->
+	      file:write_file(filename:join([Root, Name]), Contents) end,
+      NameContents).
+
+create_rnd(FromDir, ToDir) ->
+     From = filename:join([FromDir, "RAND"]),
+     To = filename:join([ToDir, "RAND"]),
+     file:copy(From, To).
+
+remove_rnd(Dir) ->
+    File = filename:join([Dir, "RAND"]),
+    file:delete(File).
+
+cmd(Cmd, Env) ->
+    FCmd = lists:flatten(Cmd),
+    Port = open_port({spawn, FCmd}, [stream, eof, exit_status, stderr_to_stdout, 
+				    {env, Env}]),
+    eval_cmd(Port, FCmd).
+
+eval_cmd(Port, Cmd) ->
+    receive 
+	{Port, {data, _}} ->
+	    eval_cmd(Port, Cmd);
+	{Port, eof} ->
+	    ok
+    end,
+    receive
+	{Port, {exit_status, 0}}  ->
+	    ok;
+	{Port, {exit_status, Status}} ->
+	    exit({eval_cmd, Cmd, Status})
+    after 0 ->
+	    ok
+    end.
+
+%%
+%% Contents of configuration files 
+%%
+
+req_cnf(C) ->
+    ["# Purpose: Configuration for requests (end users and CAs)."
+     "\n"
+     "ROOTDIR	        = $ENV::ROOTDIR\n"
+     "\n"
+
+     "[req]\n"
+     "input_password	= secret\n"
+     "output_password	= secret\n"
+     "default_bits	= ", integer_to_list(C#config.default_bits), "\n"
+     "RANDFILE		= $ROOTDIR/RAND\n"
+     "encrypt_key	= no\n"
+     "default_md	= md5\n"
+     "#string_mask	= pkix\n"
+     "x509_extensions	= ca_ext\n"
+     "prompt		= no\n"
+     "distinguished_name= name\n"
+     "\n"
+
+     "[name]\n"
+     "commonName		= ", C#config.commonName, "\n"
+     "organizationalUnitName	= ", C#config.organizationalUnitName, "\n"
+     "organizationName	        = ", C#config.organizationName, "\n" 
+     "localityName		= ", C#config.localityName, "\n"
+     "countryName		= ", C#config.countryName, "\n"
+     "emailAddress		= ", C#config.emailAddress, "\n"
+     "\n"
+
+     "[ca_ext]\n"
+     "basicConstraints 	= critical, CA:true\n"
+     "keyUsage 		= cRLSign, keyCertSign\n"
+     "subjectKeyIdentifier = hash\n"
+     "subjectAltName	= email:copy\n"].
+
+ca_cnf(C = #config{issuing_distribution_point = true}) ->
+    ["# Purpose: Configuration for CAs.\n"
+     "\n"
+     "ROOTDIR	        = $ENV::ROOTDIR\n"
+     "default_ca	= ca\n"
+     "\n"
+
+     "[ca]\n"
+     "dir		= $ROOTDIR/", C#config.commonName, "\n"
+     "certs		= $dir/certs\n"
+     "crl_dir	        = $dir/crl\n"
+     "database	        = $dir/index.txt\n"
+     "new_certs_dir	= $dir/newcerts\n"
+     "certificate	= $dir/cert.pem\n"
+     "serial		= $dir/serial\n"
+     "crl		= $dir/crl.pem\n",
+     ["crlnumber		= $dir/crlnumber\n" || C#config.v2_crls],
+     "private_key	= $dir/private/key.pem\n"
+     "RANDFILE	        = $dir/private/RAND\n"
+     "\n"
+     "x509_extensions   = user_cert\n",
+     ["crl_extensions = crl_ext\n" || C#config.v2_crls],
+     "unique_subject  = no\n"
+     "default_days	= 3600\n"
+     "default_md	= md5\n"
+     "preserve	        = no\n"
+     "policy		= policy_match\n"
+     "\n"
+
+     "[policy_match]\n"
+     "commonName		= supplied\n"
+     "organizationalUnitName	= optional\n"
+     "organizationName	        = match\n"
+     "countryName		= match\n"
+     "localityName		= match\n"
+     "emailAddress		= supplied\n"
+     "\n"
+
+     "[crl_ext]\n"
+     "authorityKeyIdentifier=keyid:always,issuer:always\n",
+     ["issuingDistributionPoint=critical, @idpsec\n" || C#config.issuing_distribution_point],
+
+     "[idpsec]\n"
+     "fullname=URI:http://localhost:8000/",C#config.commonName,"/crl.pem\n"
+
+     "[user_cert]\n"
+     "basicConstraints	= CA:false\n"
+     "keyUsage 		= nonRepudiation, digitalSignature, keyEncipherment\n"
+     "subjectKeyIdentifier = hash\n"
+     "authorityKeyIdentifier = keyid,issuer:always\n"
+     "subjectAltName	= email:copy\n"
+     "issuerAltName	= issuer:copy\n"
+     "crlDistributionPoints=@crl_section\n"
+
+     "[crl_section]\n"
+     %% intentionally invalid
+     "URI.1=http://localhost/",C#config.commonName,"/crl.pem\n"
+     "URI.2=http://localhost:",integer_to_list(C#config.crl_port),"/",C#config.commonName,"/crl.pem\n"
+     "\n"
+
+     "[user_cert_digital_signature_only]\n"
+     "basicConstraints	= CA:false\n"
+     "keyUsage 		= digitalSignature\n"
+     "subjectKeyIdentifier = hash\n"
+     "authorityKeyIdentifier = keyid,issuer:always\n"
+     "subjectAltName	= email:copy\n"
+     "issuerAltName	= issuer:copy\n"
+     "\n"
+
+     "[ca_cert]\n"
+     "basicConstraints 	= critical,CA:true\n"
+     "keyUsage 		= cRLSign, keyCertSign\n"
+     "subjectKeyIdentifier = hash\n"
+     "authorityKeyIdentifier = keyid:always,issuer:always\n"
+     "subjectAltName	= email:copy\n"
+     "issuerAltName	= issuer:copy\n"
+     "crlDistributionPoints=@crl_section\n"
+    ];
+
+ca_cnf(C = #config{issuing_distribution_point = false}) ->
+    ["# Purpose: Configuration for CAs.\n"
+     "\n"
+     "ROOTDIR	        = $ENV::ROOTDIR\n"
+     "default_ca	= ca\n"
+     "\n"
+
+     "[ca]\n"
+     "dir		= $ROOTDIR/", C#config.commonName, "\n"
+     "certs		= $dir/certs\n"
+     "crl_dir	        = $dir/crl\n"
+     "database	        = $dir/index.txt\n"
+     "new_certs_dir	= $dir/newcerts\n"
+     "certificate	= $dir/cert.pem\n"
+     "serial		= $dir/serial\n"
+     "crl		= $dir/crl.pem\n",
+     ["crlnumber		= $dir/crlnumber\n" || C#config.v2_crls],
+     "private_key	= $dir/private/key.pem\n"
+     "RANDFILE	        = $dir/private/RAND\n"
+     "\n"
+     "x509_extensions   = user_cert\n",
+     ["crl_extensions = crl_ext\n" || C#config.v2_crls],
+     "unique_subject  = no\n"
+     "default_days	= 3600\n"
+     "default_md	= md5\n"
+     "preserve	        = no\n"
+     "policy		= policy_match\n"
+     "\n"
+
+     "[policy_match]\n"
+     "commonName		= supplied\n"
+     "organizationalUnitName	= optional\n"
+     "organizationName	        = match\n"
+     "countryName		= match\n"
+     "localityName		= match\n"
+     "emailAddress		= supplied\n"
+     "\n"
+
+     "[crl_ext]\n"
+     "authorityKeyIdentifier=keyid:always,issuer:always\n",
+     %["issuingDistributionPoint=critical, @idpsec\n" || C#config.issuing_distribution_point],
+
+     %"[idpsec]\n"
+     %"fullname=URI:http://localhost:8000/",C#config.commonName,"/crl.pem\n"
+
+     "[user_cert]\n"
+     "basicConstraints	= CA:false\n"
+     "keyUsage 		= nonRepudiation, digitalSignature, keyEncipherment\n"
+     "subjectKeyIdentifier = hash\n"
+     "authorityKeyIdentifier = keyid,issuer:always\n"
+     "subjectAltName	= email:copy\n"
+     "issuerAltName	= issuer:copy\n"
+     %"crlDistributionPoints=@crl_section\n"
+
+     %%"[crl_section]\n"
+     %% intentionally invalid
+     %%"URI.1=http://localhost/",C#config.commonName,"/crl.pem\n"
+     %%"URI.2=http://localhost:",integer_to_list(C#config.crl_port),"/",C#config.commonName,"/crl.pem\n"
+     %%"\n"
+
+     "[user_cert_digital_signature_only]\n"
+     "basicConstraints	= CA:false\n"
+     "keyUsage 		= digitalSignature\n"
+     "subjectKeyIdentifier = hash\n"
+     "authorityKeyIdentifier = keyid,issuer:always\n"
+     "subjectAltName	= email:copy\n"
+     "issuerAltName	= issuer:copy\n"
+     "\n"
+
+     "[ca_cert]\n"
+     "basicConstraints 	= critical,CA:true\n"
+     "keyUsage 		= cRLSign, keyCertSign\n"
+     "subjectKeyIdentifier = hash\n"
+     "authorityKeyIdentifier = keyid:always,issuer:always\n"
+     "subjectAltName	= email:copy\n"
+     "issuerAltName	= issuer:copy\n"
+     %"crlDistributionPoints=@crl_section\n"
+    ].
diff --git a/lib/inets/test/old_httpd_SUITE.erl b/lib/inets/test/old_httpd_SUITE.erl
deleted file mode 100644
index 172db53844..0000000000
--- a/lib/inets/test/old_httpd_SUITE.erl
+++ /dev/null
@@ -1,2347 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2005-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-%%
-%%
-
--module(old_httpd_SUITE).
-
--include_lib("common_test/include/ct.hrl").
--include("inets_test_lib.hrl").
-
--include_lib("kernel/include/file.hrl").
-
-%% Test server specific exports
--export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2]).
--export([init_per_testcase/2, end_per_testcase/2,
-	 init_per_suite/1, end_per_suite/1]).
-
-%% Core Server tests
--export([
-	 ip_mod_alias/1, 
-	 ip_mod_actions/1, 
-	 ip_mod_security/1, 
-	 ip_mod_auth/1,
-	 ip_mod_auth_api/1, 
-	 ip_mod_auth_mnesia_api/1, 
-	 ip_mod_htaccess/1, 
-	 ip_mod_cgi/1, 
-	 ip_mod_esi/1,
-	 ip_mod_get/1, 
-	 ip_mod_head/1, 
-	 ip_mod_all/1, 
-	 ip_load_light/1,
-	 ip_load_medium/1, 
-	 ip_load_heavy/1, 
-	 ip_dos_hostname/1, 
-	 ip_time_test/1, 
-	 ip_block_disturbing_idle/1, 
-	 ip_block_non_disturbing_idle/1, 
-	 ip_block_503/1, 
-	 ip_block_disturbing_active/1, 
-	 ip_block_non_disturbing_active/1, 
-	 ip_block_disturbing_active_timeout_not_released/1, 
-	 ip_block_disturbing_active_timeout_released/1, 
-	 ip_block_non_disturbing_active_timeout_not_released/1, 
-	 ip_block_non_disturbing_active_timeout_released/1, 
-	 ip_block_disturbing_blocker_dies/1, 
-	 ip_block_non_disturbing_blocker_dies/1, 
-	 ip_restart_no_block/1, 
-	 ip_restart_disturbing_block/1, 
-	 ip_restart_non_disturbing_block/1
-	]).
-
--export([
-	 essl_mod_alias/1, 
-	 essl_mod_actions/1, 
-	 essl_mod_security/1, 
-	 essl_mod_auth/1, 
-	 essl_mod_auth_api/1,  
-	 essl_mod_auth_mnesia_api/1, 
-	 essl_mod_htaccess/1, 
-	 essl_mod_cgi/1,
-	 essl_mod_esi/1, 
-	 essl_mod_get/1, 
-	 essl_mod_head/1, 
-	 essl_mod_all/1, 
-	 essl_load_light/1, 
-	 essl_load_medium/1, 
-	 essl_load_heavy/1, 
-	 essl_dos_hostname/1, 
-	 essl_time_test/1,
-	 essl_restart_no_block/1, 
-	 essl_restart_disturbing_block/1,
-	 essl_restart_non_disturbing_block/1, 
-	 essl_block_disturbing_idle/1, 
-	 essl_block_non_disturbing_idle/1, 
-	 essl_block_503/1, 
-	 essl_block_disturbing_active/1, 
-	 essl_block_non_disturbing_active/1, 
-	 essl_block_disturbing_active_timeout_not_released/1, 
-	 essl_block_disturbing_active_timeout_released/1, 
-	 essl_block_non_disturbing_active_timeout_not_released/1, 
-	 essl_block_non_disturbing_active_timeout_released/1, 
-	 essl_block_disturbing_blocker_dies/1, 
-	 essl_block_non_disturbing_blocker_dies/1
-	]).
-
-%%% HTTP 1.1 tests
--export([ip_host/1, ip_chunked/1, ip_expect/1, ip_range/1,
-	 ip_if_test/1, ip_http_trace/1, ip_http1_1_head/1, 
-	 ip_mod_cgi_chunked_encoding_test/1]).
-
-%%% HTTP 1.0 tests
--export([ip_head_1_0/1, ip_get_1_0/1, ip_post_1_0/1]).
-
-%%% HTTP 0.9 tests
--export([ip_get_0_9/1]).
-
-%%% Ticket tests
--export([ticket_5775/1,ticket_5865/1,ticket_5913/1,ticket_6003/1,
-	 ticket_7304/1]).
-
-%%% IPv6 tests
--export([ipv6_hostname_ipcomm/0, ipv6_hostname_ipcomm/1, 
-	 ipv6_address_ipcomm/0,  ipv6_address_ipcomm/1, 
-	 ipv6_hostname_essl/0,   ipv6_hostname_essl/1,   
-	 ipv6_address_essl/0,    ipv6_address_essl/1]).
-
-%% Help functions 
--export([cleanup_mnesia/0, setup_mnesia/0, setup_mnesia/1]).
-
--define(IP_PORT, 8898).
--define(SSL_PORT, 8899).
--define(MAX_HEADER_SIZE, 256).
--define(IPV6_LOCAL_HOST, "0:0:0:0:0:0:0:1").
-
-%% Minutes before failed auths timeout.
--define(FAIL_EXPIRE_TIME,1). 
-
-%% Seconds before successful auths timeout.
--define(AUTH_TIMEOUT,5).
-
--record(httpd_user,  {user_name, password, user_data}).
--record(httpd_group, {group_name, userlist}).
-
-
-%%--------------------------------------------------------------------
-%% all(Arg) -> [Doc] | [Case] | {skip, Comment}
-%% Arg - doc | suite
-%% Doc - string()
-%% Case - atom() 
-%%	Name of a test case function. 
-%% Comment - string()
-%% Description: Returns documentation/test cases in this test suite
-%%		or a skip tuple if the platform is not supported.  
-%%--------------------------------------------------------------------
-suite() -> [{ct_hooks,[ts_install_cth]}].
-
-all() -> 
-    [
-     {group, ip}, 
-     {group, ssl}, 
-     %%{group, http_1_1_ip},
-     %%{group, http_1_0_ip}, 
-     %%{group, http_0_9_ip},
-     %%{group, ipv6}, 
-     {group, tickets}
-    ].
-
-groups() -> 
-    [
-     {ip, [],
-      [
-       %%ip_mod_alias, 
-       ip_mod_actions, 
-       %%ip_mod_security,
-       %% ip_mod_auth, 
-       %% ip_mod_auth_api, 
-       ip_mod_auth_mnesia_api,
-       %%ip_mod_htaccess, 
-       %%ip_mod_cgi, 
-       %%ip_mod_esi, 
-       %%ip_mod_get,
-       %%ip_mod_head, 
-       %%ip_mod_all, 
-       %% ip_load_light, 
-       %% ip_load_medium,
-       %% ip_load_heavy, 
-       %%ip_dos_hostname, 
-       ip_time_test,
-       %% Only used through load_config
-       %% but we still need these tests
-       %% should be cleaned up and moved to new test suite 
-       %%ip_restart_no_block, 
-       %%ip_restart_disturbing_block,
-       %%ip_restart_non_disturbing_block,
-       %% Tested in inets_SUITE
-       %%ip_block_disturbing_idle, 
-       %%ip_block_non_disturbing_idle,
-       ip_block_503
-       %% Tested in new httpd_SUITE
-       %%ip_block_disturbing_active,
-       %%ip_block_non_disturbing_active,
-       %%ip_block_disturbing_blocker_dies,
-       %%ip_block_non_disturbing_blocker_dies
-       %% No longer relevant
-       %%ip_block_disturbing_active_timeout_not_released,
-       %%ip_block_disturbing_active_timeout_released,
-       %%ip_block_non_disturbing_active_timeout_not_released,
-       %%ip_block_non_disturbing_active_timeout_released,
-      ]},
-     {ssl, [], [{group, essl}]},
-     {essl, [],
-      [
-       %%essl_mod_alias, 
-       essl_mod_actions, 
-       %% essl_mod_security,
-       %% essl_mod_auth, 
-       %% essl_mod_auth_api,
-       essl_mod_auth_mnesia_api, 
-       %%essl_mod_htaccess,
-       %%essl_mod_cgi, 
-       %%essl_mod_esi, 
-       %%essl_mod_get, 
-       %%essl_mod_head,
-       %% essl_mod_all, 
-       %% essl_load_light, 
-       %% essl_load_medium,
-       %% essl_load_heavy, 
-       %%essl_dos_hostname, 
-       essl_time_test
-       %% Replaced by load_config
-       %% essl_restart_no_block, 
-       %% essl_restart_disturbing_block,
-       %% essl_restart_non_disturbing_block,
-       %% essl_block_disturbing_idle,
-       %% essl_block_non_disturbing_idle, essl_block_503,
-       %% essl_block_disturbing_active,
-       %% essl_block_non_disturbing_active,
-       %% essl_block_disturbing_active_timeout_not_released,
-       %% essl_block_disturbing_active_timeout_released,
-       %% essl_block_non_disturbing_active_timeout_not_released,
-       %% essl_block_non_disturbing_active_timeout_released,
-       %% essl_block_disturbing_blocker_dies,
-       %%  essl_block_non_disturbing_blocker_dies
-      ]},
-     %% {http_1_1_ip, [],
-     %%  [
-     %%   %%ip_host, ip_chunked, ip_expect, 
-     %%   %%ip_range, 
-     %%   %%ip_if_test
-     %%   %%ip_http_trace, ip_http1_1_head,
-     %%   %%ip_mod_cgi_chunked_encoding_test
-     %%  ]},
-     %%{http_1_0_ip, [],
-      %%[ip_head_1_0, ip_get_1_0, ip_post_1_0]},
-     %%{http_0_9_ip, [], [ip_get_0_9]},
-     %% {ipv6, [], [ipv6_hostname_ipcomm, ipv6_address_ipcomm, 
-     %% 		 ipv6_hostname_essl,   ipv6_address_essl]},
-     {tickets, [],
-      [%%ticket_5775, ticket_5865, 
-       ticket_5913%%, ticket_6003,
-       %%ticket_7304
-      ]}].
-
-init_per_group(ipv6 = _GroupName, Config) ->
-    case inets_test_lib:has_ipv6_support() of
-	{ok, _} ->
-	    Config;
-	_ ->
-	    {skip, "Host does not support IPv6"}
-    end;
-init_per_group(_GroupName, Config) ->
-    Config.
-
-end_per_group(_GroupName, Config) ->
-    Config.
-
-
-%%--------------------------------------------------------------------
-%% Function: init_per_suite(Config) -> Config
-%% Config - [tuple()]
-%%   A list of key/value pairs, holding the test case configuration.
-%% Description: Initiation before the whole suite
-%%
-%% Note: This function is free to add any key/value pairs to the Config
-%% variable, but should NOT alter/remove any existing entries.
-%%--------------------------------------------------------------------
-init_per_suite(Config) ->
-    io:format(user, "init_per_suite -> entry with"
-	      "~n   Config: ~p"
-	      "~n", [Config]),
-
-    PrivDir = proplists:get_value(priv_dir, Config),
-    SuiteTopDir = filename:join(PrivDir, ?MODULE),
-    case file:make_dir(SuiteTopDir) of
-        ok ->
-            ok;
-        {error, eexist} ->
-            ok;
-        Error ->
-            throw({error, {failed_creating_suite_top_dir, Error}})
-    end,
-
-    [{has_ipv6_support, inets_test_lib:has_ipv6_support()}, 
-     {suite_top_dir,    SuiteTopDir},
-     {node,             node()},
-     {host,             inets_test_lib:hostname()},
-     {address,          getaddr()} | Config].
-
-
-%%--------------------------------------------------------------------
-%% Function: end_per_suite(Config) -> _
-%% Config - [tuple()]
-%%   A list of key/value pairs, holding the test case configuration.
-%% Description: Cleanup after the whole suite
-%%--------------------------------------------------------------------
-
-end_per_suite(_Config) ->
-    %% SuiteTopDir = proplists:get_value(suite_top_dir, Config), 
-    %% inets_test_lib:del_dirs(SuiteTopDir),
-    ok.
-
-
-%%--------------------------------------------------------------------
-%% Function: init_per_testcase(Case, Config) -> Config
-%% Case - atom()
-%%   Name of the test case that is about to be run.
-%% Config - [tuple()]
-%%   A list of key/value pairs, holding the test case configuration.
-%%
-%% Description: Initiation before each test case
-%%
-%% Note: This function is free to add any key/value pairs to the Config
-%% variable, but should NOT alter/remove any existing entries.
-%%--------------------------------------------------------------------
-init_per_testcase(Case, Config) ->
-    NewConfig = init_per_testcase2(Case, Config), 
-    init_per_testcase3(Case, NewConfig).
-
-
-init_per_testcase2(Case, Config) ->
-
-    %% tsp("init_per_testcase2 -> entry with"
-    %% 	"~n   Config: ~p", [Config]),
-    
-    IpNormal    = integer_to_list(?IP_PORT)    ++ ".conf",
-    IpHtaccess  = integer_to_list(?IP_PORT)   ++ "htaccess.conf",
-    SslNormal   = integer_to_list(?SSL_PORT)  ++ ".conf",
-    SslHtaccess = integer_to_list(?SSL_PORT) ++ "htaccess.conf",
-
-    DataDir     = proplists:get_value(data_dir, Config),
-    SuiteTopDir = proplists:get_value(suite_top_dir, Config),
-
-    %% tsp("init_per_testcase2 -> "
-    %% 	"~n   SuiteDir: ~p"
-    %% 	"~n   DataDir:  ~p", [SuiteTopDir, DataDir]),
-    
-    TcTopDir = filename:join(SuiteTopDir, Case),
-    ?line ok = file:make_dir(TcTopDir),
-
-    %% tsp("init_per_testcase2 -> "
-    %% 	"~n   TcTopDir: ~p", [TcTopDir]),
-
-    DataSrc    = filename:join([DataDir, "server_root"]),
-    ServerRoot = filename:join([TcTopDir, "server_root"]),
-    
-    %% tsp("init_per_testcase2 -> "
-    %% 	"~n   DataSrc:    ~p"
-    %% 	"~n   ServerRoot: ~p", [DataSrc, ServerRoot]),
-
-    ok = file:make_dir(ServerRoot),
-    ok = file:make_dir(filename:join([TcTopDir, "logs"])),
-
-    NewConfig = [{tc_top_dir, TcTopDir}, {server_root, ServerRoot} | Config],
-
-    %% tsp("init_per_testcase2 -> copy DataSrc to ServerRoot"),
-
-    inets_test_lib:copy_dirs(DataSrc, ServerRoot),
-
-    %% tsp("init_per_testcase2 -> fix cgi"),
-    EnvCGI =  filename:join([ServerRoot, "cgi-bin", "printenv.sh"]),
-    {ok, FileInfo} = file:read_file_info(EnvCGI),
-    ok = file:write_file_info(EnvCGI, 
-			      FileInfo#file_info{mode = 8#00755}),
-    
-    EchoCGI = case test_server:os_type() of
-	      {win32, _} ->
-		  "cgi_echo.exe";
-	      _ ->
-		  "cgi_echo"
-	      end,
-    CGIDir = filename:join([ServerRoot, "cgi-bin"]),
-    inets_test_lib:copy_file(EchoCGI, DataDir,  CGIDir),
-    NewEchoCGI = filename:join([CGIDir, EchoCGI]),
-    {ok, FileInfo1} = file:read_file_info(NewEchoCGI),
-    ok = file:write_file_info(NewEchoCGI, 
-			      FileInfo1#file_info{mode = 8#00755}),
-    
-    %% To be used by IP test cases
-    %% tsp("init_per_testcase2 -> ip testcase setups"),
-    create_config([{port, ?IP_PORT}, {sock_type, ip_comm} | NewConfig], 
-		  normal_access, IpNormal), 
-    create_config([{port, ?IP_PORT}, {sock_type, ip_comm} | NewConfig], 
-    		  mod_htaccess, IpHtaccess), 
-
-    %% To be used by SSL test cases
-    %% tsp("init_per_testcase2 -> ssl testcase setups"),
-    SocketType = 
-	case atom_to_list(Case) of
-	    [X, $s, $s, $l | _] ->
-		case X of
-		    $p -> ssl;
-		    $e -> essl
-		end;
-	    _ ->
-		ssl
-	end,
-
-    create_config([{port, ?SSL_PORT}, {sock_type, SocketType} | NewConfig], 
-		  normal_access, SslNormal),
-    create_config([{port, ?SSL_PORT}, {sock_type, SocketType} | NewConfig],
-    		  mod_htaccess, SslHtaccess),  
-  
-    %% To be used by IPv6 test cases. Case-clause is so that
-    %% you can do ts:run(inets, httpd_SUITE, <test case>)
-    %% for all cases except the ipv6 cases as they depend
-    %% on  'test_host_ipv6_only' that will only be present
-    %% when you run the whole test suite due  to shortcomings
-    %% of the test server.
-
-    tsp("init_per_testcase2 -> maybe generate IPv6 config file(s)"),
-    NewConfig2 = 
-	case atom_to_list(Case) of
-	    "ipv6_" ++ _ ->
-		case (catch inets_test_lib:has_ipv6_support(NewConfig)) of
-		    {ok, IPv6Address0} ->
-			{ok, Hostname} = inet:gethostname(), 
-			IPv6Address = http_transport:ipv6_name(IPv6Address0), 
-			create_ipv6_config([{port, ?IP_PORT}, 
-					    {sock_type, ip_comm},
-					    {ipv6_host, IPv6Address} | 
-					    NewConfig],
-					   "ipv6_hostname_ipcomm.conf", 
-					   Hostname),
-			create_ipv6_config([{port, ?IP_PORT}, 
-					    {sock_type, ip_comm},
-					    {ipv6_host, IPv6Address} | 
-					    NewConfig],
-					   "ipv6_address_ipcomm.conf",  
-					   IPv6Address),
-			create_ipv6_config([{port, ?SSL_PORT}, 
-					    {sock_type, essl},
-					    {ipv6_host, IPv6Address} | 
-					    NewConfig],
-					   "ipv6_hostname_essl.conf", 
-					   Hostname),
-			create_ipv6_config([{port, ?SSL_PORT}, 
-					    {sock_type, essl},
-					    {ipv6_host, IPv6Address} | 
-					    NewConfig],
-					   "ipv6_address_essl.conf",  
-					   IPv6Address),
-			[{ipv6_host, IPv6Address} | NewConfig];
-		    _ ->
-			NewConfig
-		end;
-
-	    _ ->
-		NewConfig
-	end,
-
-    %% tsp("init_per_testcase2 -> done when"
-    %% 	"~n   NewConfig2: ~p", [NewConfig2]),
-
-    NewConfig2.
-
-
-init_per_testcase3(Case, Config) ->
-    tsp("init_per_testcase3(~w) -> entry with"
-	"~n   Config: ~p", [Case, Config]),
-
-    
-%%     %% Create a new fresh node to be used by the server in this test-case
-    
-%%     NodeName = list_to_atom(atom_to_list(Case) ++ "_httpd"), 
-%%     Node     = inets_test_lib:start_node(NodeName),
-    
-    %% Clean up (we do not want this clean up in end_per_testcase
-    %% if init_per_testcase crashes for some testcase it will
-    %% have contaminated the environment and there will be no clean up.)
-    %% This init can take a few different paths so that one crashes
-    %% does not mean that all invocations will.
-
-    application:unset_env(inets, services),
-    application:stop(inets),
-    application:stop(ssl),
-    cleanup_mnesia(),
- 
-    %% Start initialization
-    tsp("init_per_testcase3(~w) -> start init", [Case]),
- 
-    Dog = test_server:timetrap(inets_test_lib:minutes(10)),
-    NewConfig = lists:keydelete(watchdog, 1, Config),
-    TcTopDir = proplists:get_value(tc_top_dir, Config),
-      
-    CaseRest = 
-	case atom_to_list(Case) of
-	    "ip_mod_htaccess" ->
-		inets_test_lib:start_http_server(
-		  filename:join(TcTopDir,
-				integer_to_list(?IP_PORT) ++
-				"htaccess.conf")),
-		"mod_htaccess";
-	    "ip_" ++ Rest ->
-		inets_test_lib:start_http_server(
-		  filename:join(TcTopDir,
-				integer_to_list(?IP_PORT) ++ ".conf")),
-		Rest;
-	    "ticket_5913" ->
-		HttpdOptions =
-		    [{file,
-		      filename:join(TcTopDir,
-				    integer_to_list(?IP_PORT) ++ ".conf")},
-		     {accept_timeout,30000},
-		     {debug,[{exported_functions,
-			      [httpd_manager,httpd_request_handler]}]}],
-		inets_test_lib:start_http_server(HttpdOptions);
-	    "ticket_"++Rest ->
-		%% OTP-5913 use the new syntax of inets.config 
-		inets_test_lib:start_http_server([{file,
-		  filename:join(TcTopDir,
-				integer_to_list(?IP_PORT) ++ ".conf")}]),
-		Rest;
-
-	    [X, $s, $s, $l, $_, $m, $o, $d, $_, $h, $t, $a, $c, $c, $e, $s, $s] ->
-		?ENSURE_STARTED([crypto, public_key, ssl]),		
-		SslTag = 
-		    case X of
-			$p -> ssl;  % Plain
-			$e -> essl  % Erlang based ssl
-		    end,
-		case inets_test_lib:start_http_server_ssl(
-		       filename:join(TcTopDir,
-				     integer_to_list(?SSL_PORT) ++ 
-				     "htaccess.conf"), SslTag) of
-		    ok ->
-			"mod_htaccess";
-		    Other ->
-			error_logger:info_msg("Other: ~p~n", [Other]),
-			{skip, "SSL does not seem to be supported"}
-		end;
-	    [X, $s, $s, $l, $_ | Rest] ->
-		?ENSURE_STARTED([crypto, public_key, ssl]),		
-		SslTag = 
-		    case X of
-			$p -> ssl;
-			$e -> essl
-		    end,
-		case inets_test_lib:start_http_server_ssl(
-		       filename:join(TcTopDir,
-				     integer_to_list(?SSL_PORT) ++ 
-				     ".conf"), SslTag) of
-		    ok ->
-			Rest;
-		    Other ->
-			error_logger:info_msg("Other: ~p~n", [Other]),
-			{skip, "SSL does not seem to be supported"}
-		end;
-	    "ipv6_" ++ _  = TestCaseStr ->
-		case inets_test_lib:has_ipv6_support() of
-		    {ok, _} ->
-			inets_test_lib:start_http_server(
-			  filename:join(TcTopDir,
-					TestCaseStr ++ ".conf"));
-		    
-		    _ ->
-			{skip, "Host does not support IPv6"}
-		end
-	end,
-
-    InitRes = 
-	case CaseRest of
-	    {skip, _} = Skip ->
-		Skip;
-	    "mod_auth_" ++ _ ->
-		start_mnesia(proplists:get_value(node, Config)),
-		[{watchdog, Dog} | NewConfig];
-	    "mod_htaccess" ->
-		ServerRoot = proplists:get_value(server_root, Config), 
-		Path = filename:join([ServerRoot, "htdocs"]),
-		catch remove_htaccess(Path),
-		create_htaccess_data(Path, proplists:get_value(address, Config)),
-		[{watchdog, Dog} | NewConfig];
-	    "range" ->
-		ServerRoot = proplists:get_value(server_root, Config), 
-		Path = filename:join([ServerRoot, "htdocs"]),
-		create_range_data(Path),
-		[{watchdog, Dog} | NewConfig];
-	    _ ->
-		[{watchdog, Dog} | NewConfig]
-	end,
-    
-    tsp("init_per_testcase3(~w) -> done when"
-	"~n   InitRes: ~p", [Case, InitRes]),
-
-    InitRes.
-
-
-%%--------------------------------------------------------------------
-%% Function: end_per_testcase(Case, Config) -> _
-%% Case - atom()
-%%   Name of the test case that is about to be run.
-%% Config - [tuple()]
-%%   A list of key/value pairs, holding the test case configuration.
-%% Description: Cleanup after each test case
-%%--------------------------------------------------------------------
-end_per_testcase(Case, Config) ->
-    Dog = proplists:get_value(watchdog, Config),
-    test_server:timetrap_cancel(Dog),
-    end_per_testcase2(Case, lists:keydelete(watchdog, 1, Config)),
-    ok.
-
-end_per_testcase2(Case, Config) ->
-    tsp("end_per_testcase2(~w) -> entry with"
-	"~n   Config: ~p", [Case, Config]),
-    application:unset_env(inets, services),
-    application:stop(inets),
-    application:stop(ssl),     
-    application:stop(crypto), % used by the new ssl (essl test cases)  
-    cleanup_mnesia(),
-    tsp("end_per_testcase2(~w) -> done", [Case]),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-%% Test cases starts here.
-%%-------------------------------------------------------------------------
-
-%%-------------------------------------------------------------------------
-ip_mod_alias(doc) -> 
-    ["Module test: mod_alias"];
-ip_mod_alias(suite) -> 
-    [];
-ip_mod_alias(Config) when is_list(Config) ->
-    httpd_mod:alias(ip_comm, ?IP_PORT, 
-		    proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_mod_actions(doc) -> 
-    ["Module test: mod_actions"];
-ip_mod_actions(suite) -> 
-    [];
-ip_mod_actions(Config) when is_list(Config) ->
-    httpd_mod:actions(ip_comm, ?IP_PORT, 
-		      proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_mod_security(doc) -> 
-    ["Module test: mod_security"];
-ip_mod_security(suite) -> 
-    [];
-ip_mod_security(Config) when is_list(Config) ->
-    ServerRoot = proplists:get_value(server_root, Config), 
-    httpd_mod:security(ServerRoot, ip_comm, ?IP_PORT, 
-		       proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_mod_auth(doc) -> 
-    ["Module test: mod_auth"];
-ip_mod_auth(suite) -> 
-    [];
-ip_mod_auth(Config) when is_list(Config) ->
-    httpd_mod:auth(ip_comm, ?IP_PORT, 
-		   proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_mod_auth_api(doc) -> 
-    ["Module test: mod_auth_api"];
-ip_mod_auth_api(suite) -> 
-    [];
-ip_mod_auth_api(Config) when is_list(Config) ->
-    ServerRoot = proplists:get_value(server_root, Config), 
-    Host =  proplists:get_value(host, Config),
-    Node = proplists:get_value(node, Config),
-    httpd_mod:auth_api(ServerRoot, "", ip_comm, ?IP_PORT, Host, Node),
-    httpd_mod:auth_api(ServerRoot, "dets_", ip_comm, ?IP_PORT, Host, Node),
-    httpd_mod:auth_api(ServerRoot, "mnesia_", ip_comm, ?IP_PORT, Host, Node),
-    ok. 
-%%-------------------------------------------------------------------------
-ip_mod_auth_mnesia_api(doc) -> 
-    ["Module test: mod_auth_mnesia_api"];
-ip_mod_auth_mnesia_api(suite) -> 
-    [];
-ip_mod_auth_mnesia_api(Config) when is_list(Config) ->
-    httpd_mod:auth_mnesia_api(ip_comm, ?IP_PORT, 
-		   proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_mod_htaccess(doc) -> 
-    ["Module test: mod_htaccess"];
-ip_mod_htaccess(suite) -> 
-    [];
-ip_mod_htaccess(Config) when is_list(Config) ->
-    httpd_mod:htaccess(ip_comm, ?IP_PORT, 
-		       proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_mod_cgi(doc) ->
-    ["Module test: mod_cgi"];
-ip_mod_cgi(suite) ->
-    [];
-ip_mod_cgi(Config) when is_list(Config) ->
-    httpd_mod:cgi(ip_comm, ?IP_PORT, 
-	proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_mod_esi(doc) ->
-    ["Module test: mod_esi"];
-ip_mod_esi(suite) ->
-    [];
-ip_mod_esi(Config) when is_list(Config) ->
-    httpd_mod:esi(ip_comm, ?IP_PORT, 
-		  proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_mod_get(doc) ->
-    ["Module test: mod_get"];
-ip_mod_get(suite) ->
-    [];
-ip_mod_get(Config) when is_list(Config) ->
-    httpd_mod:get(ip_comm, ?IP_PORT, 
-		  proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_mod_head(doc) ->
-    ["Module test: mod_head"];
-ip_mod_head(suite) ->
-    [];
-ip_mod_head(Config) when is_list(Config) ->
-    httpd_mod:head(ip_comm, ?IP_PORT, 
-		   proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_mod_all(doc) ->
-    ["All modules test"];
-ip_mod_all(suite) ->
-    [];
-ip_mod_all(Config) when is_list(Config) ->
-    httpd_mod:all(ip_comm, ?IP_PORT, 
-		  proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_load_light(doc) ->
-    ["Test light load"];
-ip_load_light(suite) ->
-    [];
-ip_load_light(Config) when is_list(Config) ->
-    httpd_load:load_test(ip_comm, ?IP_PORT, proplists:get_value(host, Config), 
-			 proplists:get_value(node, Config),
-			 get_nof_clients(ip_comm, light)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_load_medium(doc) ->
-    ["Test  medium load"];
-ip_load_medium(suite) ->
-    [];
-ip_load_medium(Config) when is_list(Config) ->
-      httpd_load:load_test(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-			   proplists:get_value(node, Config),
-			   get_nof_clients(ip_comm, medium)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_load_heavy(doc) ->
-    ["Test heavy load"];
-ip_load_heavy(suite) ->
-    [];
-ip_load_heavy(Config) when is_list(Config) ->
-     httpd_load:load_test(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-			  proplists:get_value(node, Config),
-			  get_nof_clients(ip_comm, heavy)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-ip_dos_hostname(doc) ->
-    ["Denial Of Service (DOS) attack test case"];
-ip_dos_hostname(suite) ->
-    [];
-ip_dos_hostname(Config) when is_list(Config) ->
-    dos_hostname(ip_comm, ?IP_PORT, proplists:get_value(host, Config), 
-		 proplists:get_value(node, Config), ?MAX_HEADER_SIZE),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-ip_time_test(doc) ->
-    [""];
-ip_time_test(suite) ->
-    [];
-ip_time_test(Config) when is_list(Config) ->
-    httpd_time_test:t(ip_comm, proplists:get_value(host, Config), ?IP_PORT),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_block_503(doc) ->
-    ["Check that you will receive status code 503 when the server"
-     " is blocked and 200 when its not blocked."];
-ip_block_503(suite) ->
-    [];
-ip_block_503(Config) when is_list(Config) ->
-    httpd_block:block_503(ip_comm, ?IP_PORT, proplists:get_value(host, Config), 
-				 proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_disturbing_idle(doc) ->
-    ["Check that you can block/unblock an idle server. The strategy " 
-     "distribing does not really make a difference in this case."];
-ip_block_disturbing_idle(suite) ->
-    [];
-ip_block_disturbing_idle(Config) when is_list(Config) ->
-    httpd_block:block_disturbing_idle(ip_comm, ?IP_PORT, 
-				      proplists:get_value(host, Config), 
-				      proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_non_disturbing_idle(doc) ->
-    ["Check that you can block/unblock an idle server. The strategy " 
-     "non distribing does not really make a difference in this case."];
-ip_block_non_disturbing_idle(suite) ->
-    [];
-ip_block_non_disturbing_idle(Config) when is_list(Config) ->
-    httpd_block:block_non_disturbing_idle(ip_comm, ?IP_PORT, 
-					  proplists:get_value(host, Config), 
-					  proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_disturbing_active(doc) ->
-    ["Check that you can block/unblock an active server. The strategy " 
-     "distribing means ongoing requests should be terminated."];
-ip_block_disturbing_active(suite) ->
-    [];
-ip_block_disturbing_active(Config) when is_list(Config) ->
-    httpd_block:block_disturbing_active(ip_comm, ?IP_PORT, 
-					proplists:get_value(host, Config), 
-					proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_non_disturbing_active(doc) ->
-    ["Check that you can block/unblock an idle server. The strategy " 
-     "non distribing means the ongoing requests should be compleated."];
-ip_block_non_disturbing_active(suite) ->
-    [];
-ip_block_non_disturbing_active(Config) when is_list(Config) ->
-    httpd_block:block_non_disturbing_idle(ip_comm, ?IP_PORT, 
-					  proplists:get_value(host, Config), 
-					  proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_block_disturbing_active_timeout_not_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "distribing means ongoing requests should be compleated"
-     "if the timeout does not occur."];
-ip_block_disturbing_active_timeout_not_released(suite) ->
-    [];
-ip_block_disturbing_active_timeout_not_released(Config) 
-  when is_list(Config) ->
-    httpd_block:block_disturbing_active_timeout_not_released(ip_comm, 
-							     ?IP_PORT, 
-							     proplists:get_value(host,
-								     Config), 
-							     proplists:get_value(node, 
-								     Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_disturbing_active_timeout_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "distribing means ongoing requests should be terminated when"
-     "the timeout occurs."];
-ip_block_disturbing_active_timeout_released(suite) ->
-    [];
-ip_block_disturbing_active_timeout_released(Config) 
-  when is_list(Config) ->
-    httpd_block:block_disturbing_active_timeout_released(ip_comm, 
-							 ?IP_PORT, 
-							 proplists:get_value(host,
-								 Config), 
-							 proplists:get_value(node, 
-								 Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_block_non_disturbing_active_timeout_not_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "non non distribing means ongoing requests should be completed."];
-ip_block_non_disturbing_active_timeout_not_released(suite) ->
-    [];
-ip_block_non_disturbing_active_timeout_not_released(Config)
-  when is_list(Config) ->
-    httpd_block:
-	block_non_disturbing_active_timeout_not_released(ip_comm,
-							 ?IP_PORT, 
-							 proplists:get_value(host, 
-								 Config), 
-							 proplists:get_value(node, 
-								 Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_non_disturbing_active_timeout_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "non non distribing means ongoing requests should be completed. "
-     "When the timeout occurs the block operation sohould be canceled." ];
-ip_block_non_disturbing_active_timeout_released(suite) ->
-    [];
-ip_block_non_disturbing_active_timeout_released(Config)
-  when is_list(Config) ->
-    httpd_block:
-	block_non_disturbing_active_timeout_released(ip_comm,
-						     ?IP_PORT, 
-						     proplists:get_value(host, 
-							     Config), 
-						     proplists:get_value(node, 
-							     Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_disturbing_blocker_dies(doc) ->
-    [];
-ip_block_disturbing_blocker_dies(suite) ->
-    [];
-ip_block_disturbing_blocker_dies(Config) when is_list(Config) ->
-    httpd_block:disturbing_blocker_dies(ip_comm, ?IP_PORT, 
-					proplists:get_value(host, Config), 
-					proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_block_non_disturbing_blocker_dies(doc) ->
-    [];
-ip_block_non_disturbing_blocker_dies(suite) ->
-    [];
-ip_block_non_disturbing_blocker_dies(Config) when is_list(Config) ->
-    httpd_block:non_disturbing_blocker_dies(ip_comm, ?IP_PORT, 
-					    proplists:get_value(host, Config), 
-					    proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_restart_no_block(doc) ->
-    [""];
-ip_restart_no_block(suite) ->
-    [];
-ip_restart_no_block(Config) when is_list(Config) ->
-    httpd_block:restart_no_block(ip_comm, ?IP_PORT, proplists:get_value(host, Config), 
-				 proplists:get_value(node, Config)),
-    ok.
-%%-------------------------------------------------------------------------
-ip_restart_disturbing_block(doc) ->
-    [""];
-ip_restart_disturbing_block(suite) ->
-    [];
-ip_restart_disturbing_block(Config) when is_list(Config) ->
-    httpd_block:restart_disturbing_block(ip_comm, ?IP_PORT, 
-					 proplists:get_value(host, Config),
-					 proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-ip_restart_non_disturbing_block(doc) ->
-    [""];
-ip_restart_non_disturbing_block(suite) ->
-    [];
-ip_restart_non_disturbing_block(Config) when is_list(Config) ->
-    httpd_block:restart_non_disturbing_block(ip_comm, ?IP_PORT,
-					    proplists:get_value(host, Config), 
-					    proplists:get_value(node, Config)),
-    ok.
-
-%%-------------------------------------------------------------------------
-
-essl_mod_alias(doc) -> 
-    ["Module test: mod_alias - using new of configure new SSL"];
-essl_mod_alias(suite) -> 
-    [];
-essl_mod_alias(Config) when is_list(Config) ->
-    ssl_mod_alias(essl, Config).
-
-
-ssl_mod_alias(Tag, Config) ->
-    httpd_mod:alias(Tag, ?SSL_PORT, 
-		    proplists:get_value(host, Config), proplists:get_value(node, Config)),
-    ok. 
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_actions(doc) -> 
-    ["Module test: mod_actions - using new of configure new SSL"];
-essl_mod_actions(suite) -> 
-    [];
-essl_mod_actions(Config) when is_list(Config) ->
-    ssl_mod_actions(essl, Config).
-
-
-ssl_mod_actions(Tag, Config) ->
-    httpd_mod:actions(Tag, 
-		      ?SSL_PORT, 
-		      proplists:get_value(host, Config), 
-		      proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_security(doc) -> 
-    ["Module test: mod_security - using new of configure new SSL"];
-essl_mod_security(suite) -> 
-    [];
-essl_mod_security(Config) when is_list(Config) ->
-    ssl_mod_security(essl, Config).
-
-ssl_mod_security(Tag, Config) ->
-    ServerRoot = proplists:get_value(server_root, Config), 
-    httpd_mod:security(ServerRoot, 
-		       Tag, 
-		       ?SSL_PORT, 
-		       proplists:get_value(host, Config), 
-		       proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_auth(doc) -> 
-    ["Module test: mod_auth - using new of configure new SSL"];
-essl_mod_auth(suite) -> 
-    [];
-essl_mod_auth(Config) when is_list(Config) ->
-    ssl_mod_auth(essl, Config).
-
-ssl_mod_auth(Tag, Config) ->
-    httpd_mod:auth(Tag, 
-		   ?SSL_PORT, 
-		   proplists:get_value(host, Config), 
-		   proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_mod_auth_api(doc) -> 
-    ["Module test: mod_auth - using new of configure new SSL"];
-essl_mod_auth_api(suite) -> 
-    [];
-essl_mod_auth_api(Config) when is_list(Config) ->
-    ssl_mod_auth_api(essl, Config).
-
-ssl_mod_auth_api(Tag, Config) ->
-    ServerRoot = proplists:get_value(server_root, Config), 
-    Host       =  proplists:get_value(host, Config),
-    Node       = proplists:get_value(node, Config),
-    httpd_mod:auth_api(ServerRoot, "",        Tag, ?SSL_PORT, Host, Node),
-    httpd_mod:auth_api(ServerRoot, "dets_",   Tag, ?SSL_PORT, Host, Node),
-    httpd_mod:auth_api(ServerRoot, "mnesia_", Tag, ?SSL_PORT, Host, Node),
-    ok. 
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_mod_auth_mnesia_api(doc) -> 
-    ["Module test: mod_auth_mnesia_api - using new of configure new SSL"];
-essl_mod_auth_mnesia_api(suite) -> 
-    [];
-essl_mod_auth_mnesia_api(Config) when is_list(Config) ->
-    ssl_mod_auth_mnesia_api(essl, Config).
-
-ssl_mod_auth_mnesia_api(Tag, Config) ->
-    httpd_mod:auth_mnesia_api(Tag, 
-			      ?SSL_PORT, 
-			      proplists:get_value(host, Config), 
-			      proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_htaccess(doc) -> 
-    ["Module test: mod_htaccess - using new of configure new SSL"];
-essl_mod_htaccess(suite) -> 
-    [];
-essl_mod_htaccess(Config) when is_list(Config) ->
-    ssl_mod_htaccess(essl, Config).
-
-ssl_mod_htaccess(Tag, Config) ->
-    httpd_mod:htaccess(Tag, 
-		       ?SSL_PORT, 
-		       proplists:get_value(host, Config), 
-		       proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_cgi(doc) ->
-    ["Module test: mod_cgi - using new of configure new SSL"];
-essl_mod_cgi(suite) ->
-    [];
-essl_mod_cgi(Config) when is_list(Config) ->
-    ssl_mod_cgi(essl, Config).
-
-ssl_mod_cgi(Tag, Config) ->
-    httpd_mod:cgi(Tag, 
-	?SSL_PORT, 
-	proplists:get_value(host, Config), 
-	proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_esi(doc) ->
-    ["Module test: mod_esi - using new of configure new SSL"];
-essl_mod_esi(suite) ->
-    [];
-essl_mod_esi(Config) when is_list(Config) ->
-    ssl_mod_esi(essl, Config).
-
-ssl_mod_esi(Tag, Config) ->
-    httpd_mod:esi(Tag, 
-		  ?SSL_PORT, 
-		  proplists:get_value(host, Config), 
-		  proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_get(doc) ->
-    ["Module test: mod_get - using new of configure new SSL"];
-essl_mod_get(suite) ->
-    [];
-essl_mod_get(Config) when is_list(Config) ->
-    ssl_mod_get(essl, Config).
-
-ssl_mod_get(Tag, Config) ->
-    httpd_mod:get(Tag, 
-		  ?SSL_PORT, 
-		  proplists:get_value(host, Config), 
-		  proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_head(doc) ->
-    ["Module test: mod_head - using new of configure new SSL"];
-essl_mod_head(suite) ->
-    [];
-essl_mod_head(Config) when is_list(Config) ->
-    ssl_mod_head(essl, Config).
-
-ssl_mod_head(Tag, Config) ->
-    httpd_mod:head(Tag, 
-		   ?SSL_PORT, 
-		   proplists:get_value(host, Config), 
-		   proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_mod_all(doc) ->
-    ["All modules test - using new of configure new SSL"];
-essl_mod_all(suite) ->
-    [];
-essl_mod_all(Config) when is_list(Config) ->
-    ssl_mod_all(essl, Config).
-
-ssl_mod_all(Tag, Config) ->
-    httpd_mod:all(Tag, 
-		  ?SSL_PORT, 
-		  proplists:get_value(host, Config), 
-		  proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_load_light(doc) ->
-    ["Test light load - using new of configure new SSL"];
-essl_load_light(suite) ->
-    [];
-essl_load_light(Config) when is_list(Config) ->
-    ssl_load_light(essl, Config).
-
-ssl_load_light(Tag, Config) ->
-    httpd_load:load_test(Tag, 
-			 ?SSL_PORT, 
-			 proplists:get_value(host, Config), 
-			 proplists:get_value(node, Config),
-			 get_nof_clients(ssl, light)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_load_medium(doc) ->
-    ["Test medium load - using new of configure new SSL"];
-essl_load_medium(suite) ->
-    [];
-essl_load_medium(Config) when is_list(Config) ->
-    ssl_load_medium(essl, Config).
-
-ssl_load_medium(Tag, Config) ->
-    httpd_load:load_test(Tag, 
-			 ?SSL_PORT, 
-			 proplists:get_value(host, Config), 
-			 proplists:get_value(node, Config),
-			 get_nof_clients(ssl, medium)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_load_heavy(doc) ->
-    ["Test heavy load - using new of configure new SSL"];
-essl_load_heavy(suite) ->
-    [];
-essl_load_heavy(Config) when is_list(Config) ->
-    ssl_load_heavy(essl, Config).
-
-ssl_load_heavy(Tag, Config) ->
-    httpd_load:load_test(Tag, 
-			 ?SSL_PORT, 
-			 proplists:get_value(host, Config), 
-			 proplists:get_value(node, Config),
-			 get_nof_clients(ssl, heavy)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_dos_hostname(doc) ->
-    ["Denial Of Service (DOS) attack test case - using new of configure new SSL"];
-essl_dos_hostname(suite) ->
-    [];
-essl_dos_hostname(Config) when is_list(Config) ->
-    ssl_dos_hostname(essl, Config).
-
-ssl_dos_hostname(Tag, Config) ->
-    dos_hostname(Tag, 
-		 ?SSL_PORT, 
-		 proplists:get_value(host, Config), 
-		 proplists:get_value(node, Config), 
-		 ?MAX_HEADER_SIZE),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_time_test(doc) ->
-    ["using new of configure new SSL"];
-essl_time_test(suite) ->
-    [];
-essl_time_test(Config) when is_list(Config) ->
-    ssl_time_test(essl, Config).
-
-ssl_time_test(Tag, Config) when is_list(Config) ->
-    httpd_time_test:t(Tag, 
-		      proplists:get_value(host, Config), 
-		      ?SSL_PORT),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_block_503(doc) ->
-    ["Check that you will receive status code 503 when the server"
-     " is blocked and 200 when its not blocked - using new of configure new SSL."];
-essl_block_503(suite) ->
-    [];
-essl_block_503(Config) when is_list(Config) ->
-    ssl_block_503(essl, Config).
-
-ssl_block_503(Tag, Config) ->
-    httpd_block:block_503(Tag, 
-			  ?SSL_PORT, 
-			  proplists:get_value(host, Config), 
-			  proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_disturbing_idle(doc) ->
-    ["Check that you can block/unblock an idle server. The strategy " 
-     "distribing does not really make a difference in this case." 
-     "Using new of configure new SSL"];
-essl_block_disturbing_idle(suite) ->
-    [];
-essl_block_disturbing_idle(Config) when is_list(Config) ->
-    ssl_block_disturbing_idle(essl, Config).
-
-ssl_block_disturbing_idle(Tag, Config) ->
-    httpd_block:block_disturbing_idle(Tag, 
-				      ?SSL_PORT, 
-				      proplists:get_value(host, Config), 
-				      proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_non_disturbing_idle(doc) ->
-    ["Check that you can block/unblock an idle server. The strategy " 
-     "non distribing does not really make a difference in this case." 
-     "Using new of configure new SSL"];
-essl_block_non_disturbing_idle(suite) ->
-    [];
-essl_block_non_disturbing_idle(Config) when is_list(Config) ->
-    ssl_block_non_disturbing_idle(essl, Config).
-
-ssl_block_non_disturbing_idle(Tag, Config) ->
-    httpd_block:block_non_disturbing_idle(Tag, 
-					  ?SSL_PORT, 
-					  proplists:get_value(host, Config), 
-					  proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_disturbing_active(doc) ->
-    ["Check that you can block/unblock an active server. The strategy " 
-     "distribing means ongoing requests should be terminated." 
-     "Using new of configure new SSL"];
-essl_block_disturbing_active(suite) ->
-    [];
-essl_block_disturbing_active(Config) when is_list(Config) ->
-    ssl_block_disturbing_active(essl, Config).
-
-ssl_block_disturbing_active(Tag, Config) ->
-    httpd_block:block_disturbing_active(Tag, 
-					?SSL_PORT, 
-					proplists:get_value(host, Config), 
-					proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_non_disturbing_active(doc) ->
-    ["Check that you can block/unblock an idle server. The strategy " 
-     "non distribing means the ongoing requests should be compleated." 
-     "Using new of configure new SSL"];
-essl_block_non_disturbing_active(suite) ->
-    [];
-essl_block_non_disturbing_active(Config) when is_list(Config) ->
-    ssl_block_non_disturbing_active(essl, Config).
-
-ssl_block_non_disturbing_active(Tag, Config) ->
-    httpd_block:block_non_disturbing_idle(Tag, 
-					  ?SSL_PORT, 
-					  proplists:get_value(host, Config), 
-					  proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_disturbing_active_timeout_not_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "distribing means ongoing requests should be compleated"
-     "if the timeout does not occur." 
-    "Using new of configure new SSL"];
-essl_block_disturbing_active_timeout_not_released(suite) ->
-    [];
-essl_block_disturbing_active_timeout_not_released(Config) 
-  when is_list(Config) ->
-    ssl_block_disturbing_active_timeout_not_released(essl, Config).
-
-ssl_block_disturbing_active_timeout_not_released(Tag, Config) ->
-    Port = ?SSL_PORT, 
-    Host = proplists:get_value(host, Config), 
-    Node = proplists:get_value(node, Config), 
-    httpd_block:block_disturbing_active_timeout_not_released(Tag, 
-							     Port, Host, Node),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_disturbing_active_timeout_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "distribing means ongoing requests should be terminated when"
-     "the timeout occurs." 
-    "Using new of configure new SSL"];
-essl_block_disturbing_active_timeout_released(suite) ->
-    [];
-essl_block_disturbing_active_timeout_released(Config) 
-  when is_list(Config) ->
-    ssl_block_disturbing_active_timeout_released(essl, Config).
-
-ssl_block_disturbing_active_timeout_released(Tag, Config) ->
-    Port = ?SSL_PORT, 
-    Host = proplists:get_value(host, Config), 
-    Node = proplists:get_value(node, Config),     
-    httpd_block:block_disturbing_active_timeout_released(Tag, 
-							 Port, 
-							 Host, 
-							 Node), 
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_non_disturbing_active_timeout_not_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "non non distribing means ongoing requests should be completed." 
-    "Using new of configure new SSL"];
-essl_block_non_disturbing_active_timeout_not_released(suite) ->
-    [];
-essl_block_non_disturbing_active_timeout_not_released(Config)
-  when is_list(Config) ->
-    ssl_block_non_disturbing_active_timeout_not_released(essl, Config).
-
-ssl_block_non_disturbing_active_timeout_not_released(Tag, Config) ->
-    Port = ?SSL_PORT, 
-    Host = proplists:get_value(host, Config), 
-    Node = proplists:get_value(node, Config), 
-    httpd_block:block_non_disturbing_active_timeout_not_released(Tag,
-								 Port, 
-								 Host, 
-								 Node),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_block_non_disturbing_active_timeout_released(doc) ->
-    ["Check that you can block an active server. The strategy " 
-     "non distribing means ongoing requests should be completed. "
-     "When the timeout occurs the block operation sohould be canceled." 
-     "Using new of configure new SSL"];
-essl_block_non_disturbing_active_timeout_released(suite) ->
-    [];
-essl_block_non_disturbing_active_timeout_released(Config)
-  when is_list(Config) ->
-    ssl_block_non_disturbing_active_timeout_released(essl, Config).
-
-ssl_block_non_disturbing_active_timeout_released(Tag, Config)
-  when is_list(Config) ->
-    Port = ?SSL_PORT, 
-    Host = proplists:get_value(host, Config), 
-    Node = proplists:get_value(node, Config), 
-    httpd_block:block_non_disturbing_active_timeout_released(Tag, 
-							     Port, 
-							     Host, 
-							     Node), 
-
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_block_disturbing_blocker_dies(doc) ->
-    ["using new of configure new SSL"];
-essl_block_disturbing_blocker_dies(suite) ->
-    [];
-essl_block_disturbing_blocker_dies(Config) when is_list(Config) ->
-    ssl_block_disturbing_blocker_dies(essl, Config).
-
-ssl_block_disturbing_blocker_dies(Tag, Config) ->
-    httpd_block:disturbing_blocker_dies(Tag, 
-					?SSL_PORT, 
-					proplists:get_value(host, Config), 
-					proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-essl_block_non_disturbing_blocker_dies(doc) ->
-    ["using new of configure new SSL"];
-essl_block_non_disturbing_blocker_dies(suite) ->
-    [];
-essl_block_non_disturbing_blocker_dies(Config) when is_list(Config) ->
-    ssl_block_non_disturbing_blocker_dies(essl, Config).
-
-ssl_block_non_disturbing_blocker_dies(Tag, Config) ->
-    httpd_block:non_disturbing_blocker_dies(Tag, 
-					    ?SSL_PORT, 
-					    proplists:get_value(host, Config), 
-					    proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_restart_no_block(doc) ->
-    ["using new of configure new SSL"];
-essl_restart_no_block(suite) ->
-    [];
-essl_restart_no_block(Config) when is_list(Config) ->
-    ssl_restart_no_block(essl, Config).
-
-ssl_restart_no_block(Tag, Config) ->
-    httpd_block:restart_no_block(Tag, 
-				 ?SSL_PORT, 
-				 proplists:get_value(host, Config), 
-				 proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_restart_disturbing_block(doc) ->
-    ["using new of configure new SSL"];
-essl_restart_disturbing_block(suite) ->
-    [];
-essl_restart_disturbing_block(Config) when is_list(Config) ->
-    ssl_restart_disturbing_block(essl, Config).
-
-ssl_restart_disturbing_block(Tag, Config) ->
-    httpd_block:restart_disturbing_block(Tag, ?SSL_PORT, 
-					 proplists:get_value(host, Config), 
-					 proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-
-
-essl_restart_non_disturbing_block(doc) ->
-    ["using new of configure new SSL"];
-essl_restart_non_disturbing_block(suite) ->
-    [];
-essl_restart_non_disturbing_block(Config) when is_list(Config) ->
-    ssl_restart_non_disturbing_block(essl, Config).
-
-ssl_restart_non_disturbing_block(Tag, Config) ->
-    httpd_block:restart_non_disturbing_block(Tag, 
-					     ?SSL_PORT, 
-					     proplists:get_value(host, Config), 
-					     proplists:get_value(node, Config)),
-    ok.
-
-
-%%-------------------------------------------------------------------------
-ip_host(doc) ->   
-    ["Control that the server accepts/rejects requests with/ without host"];
-ip_host(suite)->
-    [];
-ip_host(Config) when is_list(Config) ->
-    httpd_1_1:host(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-		   proplists:get_value(node, Config)),
-    ok.
-%%------------------------------------------------------------------------- 
-ip_chunked(doc) ->   
-    ["Control that the server accepts chunked requests"];
-ip_chunked(suite) ->
-    [];
-ip_chunked(Config) when is_list(Config) ->
-    httpd_1_1:chunked(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-		      proplists:get_value(node, Config)),
-    ok.
-%%------------------------------------------------------------------------- 
-ip_expect(doc) ->   
-    ["Control that the server handles request with the expect header "
-     "field appropiate"];
-ip_expect(suite)->
-    [];
-ip_expect(Config) when is_list(Config) ->
-    httpd_1_1:expect(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-		     proplists:get_value(node, Config)),
-    ok.
-%%------------------------------------------------------------------------- 
-ip_range(doc) ->   
-    ["Control that the server can handle range requests to plain files"];
-ip_range(suite)->
-    [];
-ip_range(Config) when is_list(Config) ->
-    httpd_1_1:range(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-		    proplists:get_value(node, Config)),
-    ok.
-%%------------------------------------------------------------------------- 
-ip_if_test(doc) ->   
-    ["Test that the if - request header fields is handled correclty"];
-ip_if_test(suite) ->
-    [];
-ip_if_test(Config) when is_list(Config) ->
-    ServerRoot = proplists:get_value(server_root, Config), 
-    DocRoot = filename:join([ServerRoot, "htdocs"]),
-    httpd_1_1:if_test(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-		      proplists:get_value(node, Config), DocRoot),
-    ok.
-%%------------------------------------------------------------------------- 
-ip_http_trace(doc) ->   
-    ["Test the trace module "];
-ip_http_trace(suite) -> 
-    [];
-ip_http_trace(Config) when is_list(Config) ->
-    httpd_1_1:http_trace(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-			 proplists:get_value(node, Config)),
-    ok.
-%%------------------------------------------------------------------------- 
-ip_http1_1_head(doc) ->  
-    ["Test the trace module "];
-ip_http1_1_head(suite)->
-    [];
-ip_http1_1_head(Config) when is_list(Config) ->
-    httpd_1_1:head(ip_comm, ?IP_PORT, proplists:get_value(host, Config),
-			   proplists:get_value(node, Config)),
-    ok.
-
-%%------------------------------------------------------------------------- 
-ip_get_0_9(doc) ->  
-    ["Test simple HTTP/0.9 GET"];
-ip_get_0_9(suite)->
-    [];
-ip_get_0_9(Config) when is_list(Config) ->
-    Host =  proplists:get_value(host, Config),
-    Node =  proplists:get_value(node, Config),
-    ok = httpd_test_lib:verify_request(ip_comm, Host, ?IP_PORT, Node, 
-				       "GET / \r\n\r\n", 
-				       [{statuscode, 200},
-					{version, "HTTP/0.9"} ]),
-    %% Without space after uri
-    ok = httpd_test_lib:verify_request(ip_comm, Host, ?IP_PORT, Node, 
-				       "GET /\r\n\r\n", 
-				       [{statuscode, 200},
-					{version, "HTTP/0.9"} ]),
-    ok = httpd_test_lib:verify_request(ip_comm, Host, ?IP_PORT, Node, 
-				       "GET / HTTP/0.9\r\n\r\n", 
-				       [{statuscode, 200},
-					{version, "HTTP/0.9"}]),
-    
-    ok.
-%%------------------------------------------------------------------------- 
-ip_head_1_0(doc) ->  
-    ["Test HTTP/1.0 HEAD"];
-ip_head_1_0(suite)->
-    [];
-ip_head_1_0(Config) when is_list(Config) ->
-    Host =  proplists:get_value(host, Config),
-    Node =  proplists:get_value(node, Config),
-    ok = httpd_test_lib:verify_request(ip_comm, Host, ?IP_PORT, Node, 
-			 "HEAD / HTTP/1.0\r\n\r\n", [{statuscode, 200},
-						    {version, "HTTP/1.0"}]),
-    
-    ok.
-%%------------------------------------------------------------------------- 
-ip_get_1_0(doc) ->  
-    ["Test HTTP/1.0 GET"];
-ip_get_1_0(suite)->
-    [];
-ip_get_1_0(Config) when is_list(Config) ->
-    Host =  proplists:get_value(host, Config),
-    Node =  proplists:get_value(node, Config),
-    ok = httpd_test_lib:verify_request(ip_comm, Host, ?IP_PORT, Node, 
-			 "GET / HTTP/1.0\r\n\r\n", [{statuscode, 200},
-						    {version, "HTTP/1.0"}]),
-    
-    ok.
-%%------------------------------------------------------------------------- 
-ip_post_1_0(doc) ->  
-    ["Test HTTP/1.0 POST"];
-ip_post_1_0(suite)->
-    [];
-ip_post_1_0(Config) when is_list(Config) ->
-    Host =  proplists:get_value(host, Config),
-    Node =  proplists:get_value(node, Config),
-    %% Test the post message formatin 1.0! Real post are testes elsewhere
-    ok = httpd_test_lib:verify_request(ip_comm, Host, ?IP_PORT, Node, 
-			 "POST / HTTP/1.0\r\n\r\n "  
-			 "Content-Length:6 \r\n\r\nfoobar", 
-			 [{statuscode, 500}, {version, "HTTP/1.0"}]),
-    
-    ok.
-%%------------------------------------------------------------------------- 
-ip_mod_cgi_chunked_encoding_test(doc) ->  
-    ["Test the trace module "];
-ip_mod_cgi_chunked_encoding_test(suite)->
-    [];
-ip_mod_cgi_chunked_encoding_test(Config) when is_list(Config) ->
-    Host = proplists:get_value(host, Config),
-    Script =
-	case test_server:os_type() of
-	    {win32, _} ->
-		"/cgi-bin/printenv.bat";
-	    _ ->
-		"/cgi-bin/printenv.sh"
-	end,
-    Requests = 
-	["GET " ++ Script ++ " HTTP/1.1\r\nHost:"++ Host ++"\r\n\r\n",
-	 "GET /cgi-bin/erl/httpd_example/newformat  HTTP/1.1\r\nHost:"
-	 ++ Host ++"\r\n\r\n"],
-    httpd_1_1:mod_cgi_chunked_encoding_test(ip_comm, ?IP_PORT,
-					    Host,
-					    proplists:get_value(node, Config),
-					    Requests),
-    ok.
-
-%------------------------------------------------------------------------- 
-
-ipv6_hostname_ipcomm() ->
-    [{require, ipv6_hosts}].
-ipv6_hostname_ipcomm(X) -> 
-    SocketType = ip_comm,
-    Port       = ?IP_PORT, 
-    ipv6_hostname(SocketType, Port, X).
-
-ipv6_hostname_essl() ->
-    [{require, ipv6_hosts}].
-ipv6_hostname_essl(X) -> 
-    SocketType = essl, 
-    Port       = ?SSL_PORT, 
-    ipv6_hostname(SocketType, Port, X).
-
-ipv6_hostname(_SocketType, _Port, doc) ->  
-    ["Test standard ipv6 address"];
-ipv6_hostname(_SocketType, _Port, suite)->
-    [];
-ipv6_hostname(SocketType, Port, Config) when is_list(Config) -> 
-    tsp("ipv6_hostname -> entry with"
-	"~n   SocketType: ~p"
-	"~n   Port:       ~p"
-	"~n   Config:     ~p", [SocketType, Port, Config]),
-    Host = proplists:get_value(host, Config),
-    URI  = "GET HTTP://" ++ 
-	Host ++ ":" ++ integer_to_list(Port) ++ "/ HTTP/1.1\r\n\r\n", 
-    tsp("ipv6_hostname -> Host: ~p", [Host]),
-    httpd_test_lib:verify_request(SocketType, Host, Port, [inet6], 
-				  node(), 
-				  URI, 
-				  [{statuscode, 200}, {version, "HTTP/1.1"}]),
-    ok.
-
-%%------------------------------------------------------------------------- 
-
-ipv6_address_ipcomm() ->
-    [{require, ipv6_hosts}].
-ipv6_address_ipcomm(X) ->
-    SocketType = ip_comm,
-    Port       = ?IP_PORT, 
-    ipv6_address(SocketType, Port, X).
-
-ipv6_address_essl() ->
-    [{require, ipv6_hosts}].
-ipv6_address_essl(X) ->
-    SocketType = essl,
-    Port       = ?SSL_PORT, 
-    ipv6_address(SocketType, Port, X).
-
-ipv6_address(_SocketType, _Port, doc) ->
-    ["Test standard ipv6 address"];
-ipv6_address(_SocketType, _Port, suite)->
-    [];
-ipv6_address(SocketType, Port, Config) when is_list(Config) ->   
-    tsp("ipv6_address -> entry with"
-	"~n   SocketType: ~p"
-	"~n   Port:       ~p"
-	"~n   Config:     ~p", [SocketType, Port, Config]),
-    Host = proplists:get_value(host, Config),
-    tsp("ipv6_address -> Host: ~p", [Host]),
-    URI = "GET HTTP://" ++ 
-	Host ++ ":" ++ integer_to_list(Port) ++ "/ HTTP/1.1\r\n\r\n", 
-    httpd_test_lib:verify_request(SocketType, Host, Port, [inet6], 
-				  node(), 
-				  URI, 
-				  [{statuscode, 200}, {version, "HTTP/1.1"}]),
-    ok.
-
-
-%%--------------------------------------------------------------------
-ticket_5775(doc) ->
-    ["Tests that content-length is correct"];
-ticket_5775(suite) ->
-    [];
-ticket_5775(Config) ->
-    ok=httpd_test_lib:verify_request(ip_comm, proplists:get_value(host, Config),
-				     ?IP_PORT, proplists:get_value(node, Config),
-				       "GET /cgi-bin/erl/httpd_example:get_bin "
-				       "HTTP/1.0\r\n\r\n", 
-				       [{statuscode, 200},
-				       {version, "HTTP/1.0"}]),
-    ok.
-ticket_5865(doc) ->
-    ["Tests that a header without last-modified is handled"];
-ticket_5865(suite) ->
-    [];
-ticket_5865(Config) ->
-    ct:skip(as_of_r15_behaviour_of_calendar_has_changed),
-    Host = proplists:get_value(host,Config),
-    ServerRoot = proplists:get_value(server_root, Config), 
-    DocRoot = filename:join([ServerRoot, "htdocs"]),
-    File = filename:join([DocRoot,"last_modified.html"]),
-
-    Bad_mtime = case test_server:os_type() of
-		    {win32, _} ->
-			{{1600,12,31},{23,59,59}};
-		    {unix, _} ->
-			{{1969,12,31},{23,59,59}}
-		end,
-    
-    {ok,FI}=file:read_file_info(File),
-    
-    case file:write_file_info(File,FI#file_info{mtime=Bad_mtime}) of
-	ok ->
-	    ok = httpd_test_lib:verify_request(ip_comm, Host,
-					       ?IP_PORT, proplists:get_value(node, Config),
-					       "GET /last_modified.html"
-					       " HTTP/1.1\r\nHost:"
-					       ++Host++"\r\n\r\n", 
-					       [{statuscode, 200},
-						{no_header,
-						 "last-modified"}]),
-	    ok;
-	{error, Reason} ->
-	    Fault = 
-		io_lib:format("Attempt to change the file info to set the"
-			      " preconditions of the test case failed ~p~n",
-			      [Reason]),
-	    {skip, Fault}
-    end.
-
-ticket_5913(doc) ->
-    ["Tests that a header without last-modified is handled"];
-ticket_5913(suite) -> [];
-ticket_5913(Config) ->
-    ok = httpd_test_lib:verify_request(ip_comm, proplists:get_value(host, Config),
-				       ?IP_PORT, proplists:get_value(node, Config),
-				       "GET /cgi-bin/erl/httpd_example:get_bin "
-				       "HTTP/1.0\r\n\r\n", 
-				       [{statuscode, 200},
-					{version, "HTTP/1.0"}]),
-    ok.
-
-ticket_6003(doc) ->
-    ["Tests that a URI with a bad hexadecimal code is handled"];
-ticket_6003(suite) -> [];
-ticket_6003(Config) ->
-    ok = httpd_test_lib:verify_request(ip_comm, proplists:get_value(host, Config),
-				       ?IP_PORT, proplists:get_value(node, Config),
-				       "GET http://www.erlang.org/%skalle "
-				       "HTTP/1.0\r\n\r\n",
-				       [{statuscode, 400},
-					{version, "HTTP/1.0"}]),
-    ok.
-
-ticket_7304(doc) ->
-     ["Tests missing CR in delimiter"];
-ticket_7304(suite) -> 
-    [];
-ticket_7304(Config) ->
-    ok = httpd_test_lib:verify_request(ip_comm, proplists:get_value(host, Config),
-				       ?IP_PORT, proplists:get_value(node, Config),
-				       "GET / HTTP/1.0\r\n\n",
-				       [{statuscode, 200},
-					{version, "HTTP/1.0"}]),
-    ok.
-
-%%--------------------------------------------------------------------
-%% Internal functions
-%%--------------------------------------------------------------------
-dos_hostname(Type, Port, Host, Node, Max) ->
-    H1 = {"", 200},
-    H2 = {"dummy-host.ericsson.se", 200},
-    TooLongHeader = lists:append(lists:duplicate(Max + 1, "a")),
-    H3 = {TooLongHeader, 403},
-    Hosts = [H1,H2,H3],
-    dos_hostname_poll(Type, Host, Port, Node, Hosts).
-
-%% make_ipv6(T) when is_tuple(T) andalso (size(T) =:= 8) ->
-%%     make_ipv6(tuple_to_list(T));
-
-%% make_ipv6([_, _, _, _, _, _, _, _] = IPV6) ->
-%%     lists:flatten(io_lib:format("~s:~s:~s:~s:~s:~s:~s:~s", IPV6)).
-
-
-%%--------------------------------------------------------------------
-%% Other help functions
-create_config(Config, Access, FileName) ->
-    ServerRoot = proplists:get_value(server_root, Config),
-    TcTopDir   = proplists:get_value(tc_top_dir,  Config),
-    Port       = proplists:get_value(port,        Config),
-    Type       = proplists:get_value(sock_type,   Config),
-    Host       = proplists:get_value(host,        Config),
-    Mods       = io_lib:format("~p", [httpd_mod]),
-    Funcs      = io_lib:format("~p", [ssl_password_cb]),
-    MaxHdrSz   = io_lib:format("~p", [256]),
-    MaxHdrAct  = io_lib:format("~p", [close]),
-
-    io:format(user, 
-	      "create_config -> "
-	      "~n   ServerRoot: ~p"
-	      "~n   TcTopDir:   ~p"
-	      "~n   Type:       ~p"
-	      "~n   Port:       ~p"
-	      "~n   Host:       ~p"
-	      "~n", [ServerRoot, TcTopDir, Type, Port, Host]),
-
-    SSL =
-	if
-	    (Type =:= ssl)  orelse 
-	    (Type =:= essl) ->
-		[cline(["SSLCertificateFile ", 
-			filename:join(ServerRoot, "ssl/ssl_server.pem")]),
-		 cline(["SSLCertificateKeyFile ",
-			filename:join(ServerRoot, "ssl/ssl_server.pem")]),
-		 cline(["SSLCACertificateFile ",
-			filename:join(ServerRoot, "ssl/ssl_server.pem")]),
-		 cline(["SSLPasswordCallbackModule ", Mods]),
-		 cline(["SSLPasswordCallbackFunction ", Funcs]),
-		 cline(["SSLVerifyClient 0"]),
-		 cline(["SSLVerifyDepth 1"])];
-	    true ->
-		[]
-	end,
-    ModOrder = 
-	case Access of
-	    mod_htaccess ->
-		"Modules mod_alias mod_htaccess mod_auth "
-		    "mod_security "
-		    "mod_responsecontrol mod_trace mod_esi "
-		    "mod_actions mod_cgi mod_dir "
-		    "mod_range mod_get "
-		    "mod_head mod_log mod_disk_log";
-	    _ ->
-		"Modules mod_alias mod_auth mod_security "
-		    "mod_responsecontrol mod_trace mod_esi "
-		    "mod_actions mod_cgi mod_dir "
-			   "mod_range mod_get "
-		    "mod_head mod_log mod_disk_log"
-	end,
-    
-    %% The test suite currently does not handle an explicit BindAddress.
-    %% They assume any has been used, that is Addr is always set to undefined!
-
-    %%     {ok, Hostname} = inet:gethostname(), 
-    %%     {ok, Addr} = inet:getaddr(Hostname, inet6),
-    %%     AddrStr = make_ipv6(Addr), 
-    %%     BindAddress = lists:flatten(io_lib:format("~s|inet6", [AddrStr])),
-
-    BindAddress = "*|inet", 
-    %% BindAddress = "*", 
-
-    HttpConfig = [
-		  cline(["Port ", integer_to_list(Port)]),
-		  cline(["ServerName ", Host]),
-		  cline(["SocketType ", atom_to_list(Type)]),
-		  cline([ModOrder]),
-		  %% cline(["LogFormat ", "erlang"]),
-		  cline(["ServerAdmin [email protected]"]),
-		  cline(["BindAddress ", BindAddress]),
-		  cline(["ServerRoot ", ServerRoot]),
-		  cline(["ErrorLog ", TcTopDir, 
-		     "/logs/error_log_", integer_to_list(Port)]),
-		  cline(["TransferLog ", TcTopDir, 
-			 "/logs/access_log_", integer_to_list(Port)]),
-		  cline(["SecurityLog ", TcTopDir, 
-			 "/logs/security_log_", integer_to_list(Port)]),
-		  cline(["ErrorDiskLog ", TcTopDir, 
-			 "/logs/error_disk_log_", integer_to_list(Port)]),
-		  cline(["ErrorDiskLogSize ", "190000 ", "11"]),
-		  cline(["TransferDiskLog ", TcTopDir, 
-			 "/logs/access_disk_log_", integer_to_list(Port)]),
-		  cline(["TransferDiskLogSize ", "200000 ", "10"]),
-		  cline(["SecurityDiskLog ", TcTopDir, 
-			 "/logs/security_disk_log_", integer_to_list(Port)]),
-		  cline(["SecurityDiskLogSize ", "210000 ", "9"]),
-		  cline(["MaxClients 10"]),
-		  cline(["MaxHeaderSize ", MaxHdrSz]),
-		  cline(["MaxHeaderAction ", MaxHdrAct]),
-		  cline(["DocumentRoot ", 
-			 filename:join(ServerRoot, "htdocs")]),
-		  cline(["DirectoryIndex ", "index.html ", "welcome.html"]),
-		  cline(["DefaultType ", "text/plain"]),
-		  SSL,
-		  mod_alias_config(ServerRoot),
-		  
-		  config_directory(filename:join([ServerRoot,"htdocs",
-						  "open"]),
-				   "Open Area", 
-				   filename:join(ServerRoot, "auth/passwd"),
-				   filename:join(ServerRoot, "auth/group"),
-				   plain,
-				   "user one Aladdin",
-				   filename:join(ServerRoot, "security_data")),
-		  config_directory(filename:join([ServerRoot,"htdocs", 
-						  "secret"]),
-				   "Secret Area", 
-				   filename:join(ServerRoot, "auth/passwd"),
-				   filename:join(ServerRoot, "auth/group"),
-				   plain,
-				   "group group1 group2",
-				   filename:join(ServerRoot, "security_data")),
-		  config_directory(filename:join([ServerRoot,"htdocs", 
-						  "secret", 
-						  "top_secret"]),
-				   "Top Secret Area", 
-				   filename:join(ServerRoot, "auth/passwd"),
-				   filename:join(ServerRoot, "auth/group"),
-				   plain,
-				   "group group3",
-				   filename:join(ServerRoot, "security_data")),
-		  
-		  config_directory(filename:join([ServerRoot,"htdocs", 
-						  "dets_open"]),
-				   "Dets Open Area", 
-				   filename:join(ServerRoot, "passwd"),
-				   filename:join(ServerRoot, "group"),
-				   dets,
-				   "user one Aladdin",
-				   filename:join(ServerRoot, "security_data")),
-		  config_directory(filename:join([ServerRoot,"htdocs", 
-						  "dets_secret"]),
-			       "Dets Secret Area", 
-				   filename:join(ServerRoot, "passwd"),
-				   filename:join(ServerRoot, "group"),
-				   dets,
-				   "group group1 group2",
-				   filename:join(ServerRoot, "security_data")),
-		  config_directory(filename:join([ServerRoot,"htdocs", 
-						  "dets_secret", 
-						  "top_secret"]),
-				   "Dets Top Secret Area", 
-				   filename:join(ServerRoot, "passwd"),
-				   filename:join(ServerRoot, "group"),
-				   dets,
-				   "group group3",
-				   filename:join(ServerRoot, "security_data")),
-		  
-		  config_directory(filename:join([ServerRoot,"htdocs", 
-						  "mnesia_open"]),
-				   "Mnesia Open Area", 
-				   false,
-				   false,
-				   mnesia,
-				   "user one Aladdin",
-			       filename:join(ServerRoot, "security_data")),
-		  config_directory(filename:join([ServerRoot,"htdocs", 
-						  "mnesia_secret"]),
-				   "Mnesia Secret Area", 
-				   false,
-				   false,
-				   mnesia,
-				   "group group1 group2",
-				   filename:join(ServerRoot, "security_data")),
-		  config_directory(filename:join(
-				     [ServerRoot, "htdocs", "mnesia_secret",
-				      "top_secret"]),
-				   "Mnesia Top Secret Area", 
-				   false,
-				   false,
-				   mnesia,
-				   "group group3",
-				   filename:join(ServerRoot, "security_data"))
-		 ],
-    ConfigFile = filename:join([TcTopDir, FileName]),
-    {ok, Fd} = file:open(ConfigFile, [write]),
-    ok = file:write(Fd, lists:flatten(HttpConfig)),
-    ok = file:close(Fd).
-
-config_directory(Dir, AuthName, AuthUserFile, AuthGroupFile, AuthDBType, 
-		 Require, SF) ->
-    file:delete(SF),
-    [
-     cline(["<Directory ", Dir, ">"]),
-     cline(["SecurityDataFile ", SF]),
-     cline(["SecurityMaxRetries 3"]),
-     cline(["SecurityFailExpireTime ", integer_to_list(?FAIL_EXPIRE_TIME)]),
-     cline(["SecurityBlockTime 1"]),
-     cline(["SecurityAuthTimeout ", integer_to_list(?AUTH_TIMEOUT)]),
-     cline(["SecurityCallbackModule ", "httpd_mod"]),
-     cline_if_set("AuthUserFile", AuthUserFile),
-     cline_if_set("AuthGroupFile", AuthGroupFile),
-     cline_if_set("AuthName", AuthName),
-     cline_if_set("AuthDBType", AuthDBType),
-     cline(["require ", Require]),
-     cline(["</Directory>\r\n"])
-    ].
-
-mod_alias_config(Root) ->
-    [
-     cline(["Alias /icons/ ", filename:join(Root,"icons"), "/"]),
-     cline(["Alias /pics/ ", filename:join(Root, "icons"), "/"]),
-     cline(["ScriptAlias /cgi-bin/ ", filename:join(Root, "cgi-bin"), "/"]),
-     cline(["ScriptAlias /htbin/ ", filename:join(Root, "cgi-bin"), "/"]),
-     cline(["ErlScriptAlias /cgi-bin/erl httpd_example io"]),
-     cline(["EvalScriptAlias /eval httpd_example io"])
-    ].
-
-cline(List) ->
-    lists:flatten([List, "\r\n"]).
-
-cline_if_set(_, false) ->
-    [];
-cline_if_set(Name, Var) when is_list(Var) ->
-    cline([Name, " ", Var]);
-cline_if_set(Name, Var) when is_atom(Var) ->
-    cline([Name, " ", atom_to_list(Var)]).
-
-getaddr() ->
-    {ok,HostName} = inet:gethostname(),
-    {ok,{A1,A2,A3,A4}} = inet:getaddr(HostName,inet),
-    lists:flatten(io_lib:format("~p.~p.~p.~p",[A1,A2,A3,A4])).
-
-start_mnesia(Node) ->
-    case rpc:call(Node, ?MODULE, cleanup_mnesia, []) of
-	ok ->
-	    ok;
-	Other ->
-	    tsf({failed_to_cleanup_mnesia, Other})
-    end,
-    case rpc:call(Node, ?MODULE, setup_mnesia, []) of
-	{atomic, ok} ->
-	    ok;
-	Other2 ->
-	    tsf({failed_to_setup_mnesia, Other2})
-    end,
-    ok.
-
-setup_mnesia() ->
-    setup_mnesia([node()]).
-
-setup_mnesia(Nodes) ->
-    ok = mnesia:create_schema(Nodes),
-    ok = mnesia:start(),
-    {atomic, ok} = mnesia:create_table(httpd_user,
-				       [{attributes, 
-					 record_info(fields, httpd_user)}, 
-					{disc_copies,Nodes}, {type, set}]),
-    {atomic, ok} = mnesia:create_table(httpd_group,
-				       [{attributes, 
-					 record_info(fields,
-						     httpd_group)}, 
-					{disc_copies,Nodes}, {type,bag}]).
-
-cleanup_mnesia() ->
-    mnesia:start(),
-    mnesia:delete_table(httpd_user),
-    mnesia:delete_table(httpd_group),
-    stopped = mnesia:stop(),
-    mnesia:delete_schema([node()]),
-    ok.
-
-create_htaccess_data(Path, IpAddress)->
-    create_htaccess_dirs(Path),
-    
-    create_html_file(filename:join([Path,"ht/open/dummy.html"])),
-    create_html_file(filename:join([Path,"ht/blocknet/dummy.html"])),
-    create_html_file(filename:join([Path,"ht/secret/dummy.html"])),
-    create_html_file(filename:join([Path,"ht/secret/top_secret/dummy.html"])),
-    
-    create_htaccess_file(filename:join([Path,"ht/open/.htaccess"]),
-			 Path, "user one Aladdin"),
-    create_htaccess_file(filename:join([Path,"ht/secret/.htaccess"]),
-			 Path, "group group1 group2"),
-    create_htaccess_file(filename:join([Path,
-				       "ht/secret/top_secret/.htaccess"]),
-			Path, "user four"),
-    create_htaccess_file(filename:join([Path,"ht/blocknet/.htaccess"]),
-			Path, nouser, IpAddress),
-   
-    create_user_group_file(filename:join([Path,"ht","users.file"]),
-			   "one:OnePassword\ntwo:TwoPassword\nthree:"
-			   "ThreePassword\nfour:FourPassword\nAladdin:"
-			   "AladdinPassword"),
-    create_user_group_file(filename:join([Path,"ht","groups.file"]),
-			   "group1: two one\ngroup2: two three").
-
-create_html_file(PathAndFileName)->
-    file:write_file(PathAndFileName,list_to_binary(
-	 "<html><head><title>test</title></head>
-         <body>testar</body></html>")).
-
-create_htaccess_file(PathAndFileName, BaseDir, RequireData)->
-    file:write_file(PathAndFileName,
-		    list_to_binary(
-		      "AuthUserFile "++ BaseDir ++
-		      "/ht/users.file\nAuthGroupFile "++ BaseDir
-		      ++ "/ht/groups.file\nAuthName Test\nAuthType"
-		      " Basic\n<Limit>\nrequire " ++ RequireData ++
-		      "\n</Limit>")).
-
-create_htaccess_file(PathAndFileName, BaseDir, nouser, IpAddress)->
-    file:write_file(PathAndFileName,list_to_binary(
-				      "AuthUserFile "++ BaseDir ++
-				      "/ht/users.file\nAuthGroupFile " ++ 
-				      BaseDir ++ "/ht/groups.file\nAuthName"
-				      " Test\nAuthType"
-				      " Basic\n<Limit GET>\n\tallow from " ++ 
-				      format_ip(IpAddress,
-						string:rchr(IpAddress,$.)) ++ 
-				      "\n</Limit>")).
-
-create_user_group_file(PathAndFileName, Data)->
-    file:write_file(PathAndFileName, list_to_binary(Data)).
-
-create_htaccess_dirs(Path)->
-    ok = file:make_dir(filename:join([Path,"ht"])),
-    ok = file:make_dir(filename:join([Path,"ht/open"])),
-    ok = file:make_dir(filename:join([Path,"ht/blocknet"])),
-    ok = file:make_dir(filename:join([Path,"ht/secret"])),
-    ok = file:make_dir(filename:join([Path,"ht/secret/top_secret"])).
-
-remove_htaccess_dirs(Path)->
-    file:del_dir(filename:join([Path,"ht/secret/top_secret"])),
-    file:del_dir(filename:join([Path,"ht/secret"])),
-    file:del_dir(filename:join([Path,"ht/blocknet"])),
-    file:del_dir(filename:join([Path,"ht/open"])),
-    file:del_dir(filename:join([Path,"ht"])).
-
-format_ip(IpAddress,Pos)when Pos > 0->
-    case lists:nth(Pos,IpAddress) of
-	$.->
-	    case lists:nth(Pos-2,IpAddress) of
-		$.->
-		   format_ip(IpAddress,Pos-3);
-		_->
-		    lists:sublist(IpAddress,Pos-2) ++ "."
-	    end;
-	_ ->
-	    format_ip(IpAddress,Pos-1)
-    end;
-
-format_ip(IpAddress, _Pos)->
-    "1" ++ IpAddress.
-
-remove_htaccess(Path)->
-    file:delete(filename:join([Path,"ht/open/dummy.html"])),
-    file:delete(filename:join([Path,"ht/secret/dummy.html"])),
-    file:delete(filename:join([Path,"ht/secret/top_secret/dummy.html"])),
-    file:delete(filename:join([Path,"ht/blocknet/dummy.html"])),
-    file:delete(filename:join([Path,"ht/blocknet/.htaccess"])),
-    file:delete(filename:join([Path,"ht/open/.htaccess"])),
-    file:delete(filename:join([Path,"ht/secret/.htaccess"])),
-    file:delete(filename:join([Path,"ht/secret/top_secret/.htaccess"])),
-    file:delete(filename:join([Path,"ht","users.file"])),
-    file:delete(filename:join([Path,"ht","groups.file"])),
-    remove_htaccess_dirs(Path).
-
-
-dos_hostname_poll(Type, Host, Port, Node, Hosts) ->
-    [dos_hostname_poll1(Type, Host, Port, Node, Host1, Code)
-     || {Host1,Code} <- Hosts].
-
-dos_hostname_poll1(Type, Host, Port, Node, Host1, Code) ->
-    ok = httpd_test_lib:verify_request(Type, Host, Port, Node, 
-				       dos_hostname_request(Host1),
-				       [{statuscode, Code},
-					{version, "HTTP/1.0"}]).
-        
-dos_hostname_request(Host) ->
-    "GET / HTTP/1.0\r\n" ++ Host ++ "\r\n\r\n".
-
-get_nof_clients(Mode, Load) ->
-    get_nof_clients(test_server:os_type(), Mode, Load).
-
-get_nof_clients(_,       ip_comm, light)  -> 5;
-get_nof_clients(_,       ssl,     light)  -> 2;
-get_nof_clients(_,       ip_comm, medium) -> 10;
-get_nof_clients(_,       ssl,     medium) -> 4;
-get_nof_clients(_,       ip_comm, heavy)  -> 20;
-get_nof_clients(_,       ssl,     heavy)  -> 6.
-
-%% Make a file 100 bytes long containing 012...9*10
-create_range_data(Path) ->
-    PathAndFileName=filename:join([Path,"range.txt"]),
-    file:write_file(PathAndFileName,list_to_binary(["12345678901234567890",
-						   "12345678901234567890",
-						   "12345678901234567890",
-						   "12345678901234567890",
-						   "12345678901234567890"])).
-
-create_ipv6_config(Config, FileName, Ipv6Address) ->
-    ServerRoot = proplists:get_value(server_root, Config),
-    TcTopDir   = proplists:get_value(tc_top_dir,  Config),
-    Port       = proplists:get_value(port,        Config),
-    SockType   = proplists:get_value(sock_type,   Config),
-    Mods       = io_lib:format("~p",  [httpd_mod]),
-    Funcs      = io_lib:format("~p",  [ssl_password_cb]),
-    Host       = proplists:get_value(ipv6_host,   Config),
-
-    MaxHdrSz     = io_lib:format("~p", [256]),
-    MaxHdrAct    = io_lib:format("~p", [close]),
-  
-    Mod_order = "Modules mod_alias mod_auth mod_esi mod_actions mod_cgi" 
-	" mod_dir mod_get mod_head" 
-	" mod_log mod_disk_log mod_trace",
-	    
-    SSL =
-	if
-	    (SockType =:= ssl)  orelse 
-	    (SockType =:= essl) ->
-		[cline(["SSLCertificateFile ", 
-			filename:join(ServerRoot, "ssl/ssl_server.pem")]),
-		 cline(["SSLCertificateKeyFile ",
-			filename:join(ServerRoot, "ssl/ssl_server.pem")]),
-		 cline(["SSLCACertificateFile ",
-			filename:join(ServerRoot, "ssl/ssl_server.pem")]),
-		 cline(["SSLPasswordCallbackModule ", Mods]),
-		 cline(["SSLPasswordCallbackFunction ", Funcs]),
-		 cline(["SSLVerifyClient 0"]),
-		 cline(["SSLVerifyDepth 1"])];
-	    true ->
-		[]
-	end,
-
-    BindAddress = "[" ++ Ipv6Address ++"]|inet6", 
-
-    HttpConfig = 
-	[cline(["BindAddress ", BindAddress]),
-	 cline(["Port ", integer_to_list(Port)]),
-	 cline(["ServerName ", Host]),
-	 cline(["SocketType ", atom_to_list(SockType)]),
-	 cline([Mod_order]),
-	 cline(["ServerRoot ", ServerRoot]),
-	 cline(["DocumentRoot ", filename:join(ServerRoot, "htdocs")]),
-	 cline(["MaxHeaderSize ",MaxHdrSz]),
-	 cline(["MaxHeaderAction ",MaxHdrAct]),
-	 cline(["DirectoryIndex ", "index.html "]),
-	 cline(["DefaultType ", "text/plain"]), 
-	 SSL],
-    ConfigFile = filename:join([TcTopDir,FileName]),
-    {ok, Fd} = file:open(ConfigFile, [write]),
-    ok = file:write(Fd, lists:flatten(HttpConfig)),
-    ok = file:close(Fd).
-
-
-tsp(F) ->
-    inets_test_lib:tsp("[~w]" ++ F, [?MODULE]).
-tsp(F, A) ->
-    inets_test_lib:tsp("[~w]" ++ F, [?MODULE|A]).
-
-tsf(Reason) ->
-    inets_test_lib:tsf(Reason).
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/Makefile.src b/lib/inets/test/old_httpd_SUITE_data/Makefile.src
deleted file mode 100644
index b0fdb43d8d..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/Makefile.src
+++ /dev/null
@@ -1,14 +0,0 @@
-CC = @CC@
-LD = @LD@
-CFLAGS = @CFLAGS@ -I@erl_include@ @DEFS@
-CROSSLDFLAGS = @CROSSLDFLAGS@
-
-PROGS = cgi_echo@exe@
-
-all: $(PROGS)
-
-cgi_echo@exe@: cgi_echo@obj@
-	$(LD) $(CROSSLDFLAGS) -o cgi_echo cgi_echo@obj@ @LIBS@
-
-cgi_echo@obj@: cgi_echo.c
-	$(CC) -c -o cgi_echo@obj@ $(CFLAGS) cgi_echo.c
diff --git a/lib/inets/test/old_httpd_SUITE_data/cgi_echo.c b/lib/inets/test/old_httpd_SUITE_data/cgi_echo.c
deleted file mode 100644
index 580f860e96..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/cgi_echo.c
+++ /dev/null
@@ -1,97 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-
-#if defined __WIN32__
-#include <windows.h> 
-#include <fcntl.h>
-#endif
-
-static int read_exact(char *buffer, int len);
-static int write_exact(char *buffer, int len);
-
-int main(void)
-{
-    char msg[100];
-    int msg_len;
-#ifdef __WIN32__
-    _setmode(_fileno( stdin),  _O_BINARY);
-    _setmode(_fileno( stdout), _O_BINARY);
-#endif    
-    msg_len = read_exact(msg, 100);
-
-    write_exact("Content-type: text/plain\r\n\r\n", 28);
-    write_exact(msg, msg_len);
-    exit(EXIT_SUCCESS);
-}
-  
-
-/* read from stdin */ 
-#ifdef __WIN32__
-static int read_exact(char *buffer, int len)
-{
-    HANDLE standard_input = GetStdHandle(STD_INPUT_HANDLE);
-    
-    unsigned read_result;
-    unsigned sofar = 0;
-    
-    if (!len) { /* Happens for "empty packages */
-	return 0;
-    }
-    for (;;) {
-	if (!ReadFile(standard_input, buffer + sofar,
-		      len - sofar, &read_result, NULL)) {
-	    return -1; /* EOF */
-	}
-	if (!read_result) {
-	    return -2; /* Interrupted while reading? */
-	}
-	sofar += read_result;
-	if (sofar == len) {
-	    return len;
-	}
-    }
-} 
-#else
-static int read_exact(char *buffer, int len) {
-    int i, got = 0;
-    
-    do {
-	if ((i = read(0, buffer + got, len - got)) <= 0)
-	    return(i);
-	got += i;
-    } while (got < len);
-    return len;
-   
-}
-#endif
-
-/* write to stdout */
-#ifdef __WIN32__
- static int write_exact(char *buffer, int len)
-   {
-     HANDLE standard_output = GetStdHandle(STD_OUTPUT_HANDLE);
-     unsigned written;
-
-     if (!WriteFile(standard_output, buffer, len, &written, NULL)) {
-       return -1; /* Broken Pipe */
-     }
-     if (written < ((unsigned) len)) {
-       /* This should not happen, standard output is not blocking? */
-       return -2;
-     }
-
-    return (int) written;
-}
-
-#else 
- static int write_exact(char *buffer, int len) {
-   int i, wrote = 0;
-
-   do {
-     if ((i = write(1, buffer + wrote, len - wrote)) <= 0)
-       return i;
-     wrote += i;
-   } while (wrote < len);
-   return len;
- }
-#endif
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/Makefile b/lib/inets/test/old_httpd_SUITE_data/server_root/Makefile
deleted file mode 100644
index ed4d63a3bb..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/Makefile
+++ /dev/null
@@ -1,210 +0,0 @@
-#
-# %CopyrightBegin%
-#
-# Copyright Ericsson AB 1997-2016. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-# %CopyrightEnd%
-#
-#
-include $(ERL_TOP)/make/target.mk
-include $(ERL_TOP)/make/$(TARGET)/otp.mk
-
-# ----------------------------------------------------
-# Application version
-# ----------------------------------------------------
-include ../../vsn.mk
-VSN=$(INETS_VSN)
-
-# ----------------------------------------------------
-# Release directory specification
-# ----------------------------------------------------
-RELSYSDIR = $(RELEASE_PATH)/lib/inets-$(VSN)
-
-# ----------------------------------------------------
-# Target Specs
-# ----------------------------------------------------
-MODULE= 
-
-AUTH_FILES = auth/group \
-	auth/passwd 
-CGI_FILES = cgi-bin/printenv.sh 
-CONF_FILES = conf/8080.conf \
-	conf/8888.conf \
-	conf/httpd.conf \
-	conf/ssl.conf \
-	conf/mime.types 
-OPEN_FILES = htdocs/open/dummy.html 
-MNESIA_OPEN_FILES = htdocs/mnesia_open/dummy.html 
-MISC_FILES = htdocs/misc/friedrich.html \
-	htdocs/misc/oech.html
-SECRET_FILES = htdocs/secret/dummy.html 
-MNESIA_SECRET_FILES = htdocs/mnesia_secret/dummy.html 
-HTDOCS_FILES = htdocs/index.html \
-	htdocs/config.shtml \
-	htdocs/echo.shtml \
-	htdocs/exec.shtml \
-	htdocs/flastmod.shtml \
-	htdocs/fsize.shtml \
-	htdocs/include.shtml
-ICON_FILES = icons/README \
-	icons/a.gif \
-	icons/alert.black.gif \
-	icons/alert.red.gif \
-	icons/apache_pb.gif \
-	icons/back.gif \
-	icons/ball.gray.gif \
-	icons/ball.red.gif \
-	icons/binary.gif \
-	icons/binhex.gif \
-	icons/blank.gif \
-	icons/bomb.gif \
-	icons/box1.gif \
-	icons/box2.gif \
-	icons/broken.gif \
-	icons/burst.gif \
-	icons/button1.gif \
-	icons/button10.gif \
-	icons/button2.gif \
-	icons/button3.gif \
-	icons/button4.gif \
-	icons/button5.gif \
-	icons/button6.gif \
-	icons/button7.gif \
-	icons/button8.gif \
-	icons/button9.gif \
-	icons/buttonl.gif \
-	icons/buttonr.gif \
-	icons/c.gif \
-	icons/comp.blue.gif \
-	icons/comp.gray.gif \
-	icons/compressed.gif \
-	icons/continued.gif \
-	icons/dir.gif \
-	icons/down.gif \
-	icons/dvi.gif \
-	icons/f.gif \
-	icons/folder.gif \
-	icons/folder.open.gif \
-	icons/folder.sec.gif \
-	icons/forward.gif \
-	icons/generic.gif \
-	icons/generic.red.gif \
-	icons/generic.sec.gif \
-	icons/hand.right.gif \
-	icons/hand.up.gif \
-	icons/htdig.gif \
-	icons/icon.sheet.gif \
-	icons/image1.gif \
-	icons/image2.gif \
-	icons/image3.gif \
-	icons/index.gif \
-	icons/layout.gif \
-	icons/left.gif \
-	icons/link.gif \
-	icons/movie.gif \
-	icons/p.gif \
-	icons/patch.gif \
-	icons/pdf.gif \
-	icons/pie0.gif \
-	icons/pie1.gif \
-	icons/pie2.gif \
-	icons/pie3.gif \
-	icons/pie4.gif \
-	icons/pie5.gif \
-	icons/pie6.gif \
-	icons/pie7.gif \
-	icons/pie8.gif \
-	icons/portal.gif \
-	icons/poweredby.gif \
-	icons/ps.gif \
-	icons/quill.gif \
-	icons/right.gif \
-	icons/screw1.gif \
-	icons/screw2.gif \
-	icons/script.gif \
-	icons/sound1.gif \
-	icons/sound2.gif \
-	icons/sphere1.gif \
-	icons/sphere2.gif \
-	icons/star.gif \
-	icons/star_blank.gif \
-	icons/tar.gif \
-	icons/tex.gif \
-	icons/text.gif \
-	icons/transfer.gif \
-	icons/unknown.gif \
-	icons/up.gif \
-	icons/uu.gif \
-	icons/uuencoded.gif \
-	icons/world1.gif \
-	icons/world2.gif
-
-SSL_FILES = ssl/ssl_client.pem \
-	ssl/ssl_server.pem
-
-# ----------------------------------------------------
-# FLAGS
-# ----------------------------------------------------
-ERL_COMPILE_FLAGS +=
-
-# ----------------------------------------------------
-# Targets
-# ----------------------------------------------------
-
-debug opt: 
-
-clean:
-
-docs:
-
-# ----------------------------------------------------
-# Release Target
-# ---------------------------------------------------- 
-include $(ERL_TOP)/make/otp_release_targets.mk
-
-release_spec: opt
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/auth
-	$(INSTALL_DATA) $(AUTH_FILES) $(RELSYSDIR)/examples/server_root/auth
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/cgi-bin
-	$(INSTALL_SCRIPT) $(CGI_FILES) $(RELSYSDIR)/examples/server_root/cgi-bin
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/conf
-	$(INSTALL_DATA) $(CONF_FILES) $(RELSYSDIR)/examples/server_root/conf
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/htdocs/open
-	$(INSTALL_DATA) $(OPEN_FILES) \
-		$(RELSYSDIR)/examples/server_root/htdocs/open
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/htdocs/mnesia_open
-	$(INSTALL_DATA) $(MNESIA_OPEN_FILES) \
-		$(RELSYSDIR)/examples/server_root/htdocs/mnesia_open
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/htdocs/misc
-	$(INSTALL_DATA) $(MISC_FILES) \
-		$(RELSYSDIR)/examples/server_root/htdocs/misc
-	$(INSTALL_DIR)  \
-		$(RELSYSDIR)/examples/server_root/htdocs/secret/top_secret
-	$(INSTALL_DIR)  \
-		$(RELSYSDIR)/examples/server_root/htdocs/mnesia_secret/top_secret
-	$(INSTALL_DATA) $(SECRET_FILES)  \
-		$(RELSYSDIR)/examples/server_root/htdocs/secret
-	$(INSTALL_DATA) $(MNESIA_SECRET_FILES)  \
-		$(RELSYSDIR)/examples/server_root/htdocs/mnesia_secret
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/htdocs
-	$(INSTALL_DATA) $(HTDOCS_FILES) $(RELSYSDIR)/examples/server_root/htdocs
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/icons
-	$(INSTALL_DATA) $(ICON_FILES) $(RELSYSDIR)/examples/server_root/icons
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/ssl
-	$(INSTALL_DATA) $(SSL_FILES) $(RELSYSDIR)/examples/server_root/ssl
-	$(INSTALL_DIR) $(RELSYSDIR)/examples/server_root/logs
-
-release_docs_spec:
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/auth/group b/lib/inets/test/old_httpd_SUITE_data/server_root/auth/group
deleted file mode 100644
index b3da0ccbd3..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/auth/group
+++ /dev/null
@@ -1,3 +0,0 @@
-group1: one two
-group2: two three
-group3: three Aladdin
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/auth/passwd b/lib/inets/test/old_httpd_SUITE_data/server_root/auth/passwd
deleted file mode 100644
index 8c980ff547..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/auth/passwd
+++ /dev/null
@@ -1,4 +0,0 @@
-one:onePassword
-two:twoPassword
-three:threePassword
-Aladdin:AladdinPassword
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/cgi-bin/printenv.bat b/lib/inets/test/old_httpd_SUITE_data/server_root/cgi-bin/printenv.bat
deleted file mode 100644
index 25a49a1536..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/cgi-bin/printenv.bat
+++ /dev/null
@@ -1,9 +0,0 @@
-@echo off
-echo tomrad > c:\cygwin\tmp\hej
-echo Content-type: text/html
-echo.
-echo ^<HTML^> ^<HEAD^> ^<TITLE^>OS Environment^</TITLE^> ^</HEAD^> ^<BODY^>^<PRE^>
-set
-echo ^</PRE^>^</BODY^>^</HTML^>
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/cgi-bin/printenv.sh b/lib/inets/test/old_httpd_SUITE_data/server_root/cgi-bin/printenv.sh
deleted file mode 100755
index de81de9bde..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/cgi-bin/printenv.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/sh
-echo "Content-type: text/html"
-echo ""
-echo "<HTML> <HEAD> <TITLE>OS Environment</TITLE> </HEAD> <BODY><PRE>"
-env
-echo "</PRE></BODY></HTML>"
\ No newline at end of file
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/8080.conf b/lib/inets/test/old_httpd_SUITE_data/server_root/conf/8080.conf
deleted file mode 100644
index 7b1b4a15b2..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/8080.conf
+++ /dev/null
@@ -1,79 +0,0 @@
-Port 8080
-#ServerName your.server.net
-SocketType ip_comm
-Modules mod_alias mod_auth mod_esi mod_actions mod_cgi mod_dir mod_get mod_head mod_log mod_disk_log
-ServerAdmin [email protected]
-ServerRoot /var/tmp/server_root
-ErrorLog logs/error_log_8080
-TransferLog logs/access_log_8080
-SecurityLog logs/security_log_8080
-ErrorDiskLog logs/error_disk_log_8080
-ErrorDiskLogSize 200000 10
-TransferDiskLog logs/access_disk_log_8080
-TransferDiskLogSize 200000 10
-SecurityDiskLog logs/security_disk_log
-SecurityDiskLogSize 200000 10
-MaxClients 50
-#KeepAlive 5
-#KeepAliveTimeout 10
-DocumentRoot /var/tmp/server_root/htdocs
-DirectoryIndex index.html welcome.html
-DefaultType text/plain
-Alias /icons/ /var/tmp/server_root/icons/
-Alias /pics/ /var/tmp/server_root/icons/
-ScriptAlias /cgi-bin/ /var/tmp/server_root/cgi-bin/
-ScriptAlias /htbin/ /var/tmp/server_root/cgi-bin/
-ErlScriptAlias /cgi-bin/erl httpd_example io
-EvalScriptAlias /eval httpd_example io
-#Script HEAD /cgi-bin/printenv.sh
-#Action image/gif /cgi-bin/printenv.sh
-
-<Directory /var/tmp/server_root/htdocs/open>
-AuthDBType plain
-AuthName Open Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret>
-AuthDBType plain
-AuthName Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret/top_secret>
-AuthDBType plain
-AuthName Top Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group3
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_open>
-AuthDBType mnesia
-AuthName Open Area
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret>
-AuthDBType mnesia
-AuthName Secret Area
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret/top_secret>
-AuthDBType mnesia
-AuthName Top Secret Area
-require group group3
-allow from 130.100.34 130.100.35
-deny from 100.234.22.12 194.100.34.1 130.100.34.25
-SecurityDataFile logs/security_data
-SecurityMaxRetries 3
-SecurityBlockTime 10
-SecurityFailExpireTime 1
-SecurityAuthTimeout 1
-SecurityCallbackModule security_callback
-</Directory>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/8888.conf b/lib/inets/test/old_httpd_SUITE_data/server_root/conf/8888.conf
deleted file mode 100644
index 042779fcd0..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/8888.conf
+++ /dev/null
@@ -1,63 +0,0 @@
-Port 8888
-#ServerName your.server.net
-SocketType ip_comm
-Modules mod_alias mod_auth mod_esi mod_actions mod_cgi mod_dir mod_get mod_head mod_log mod_disk_log
-ServerAdmin [email protected]
-ServerRoot /var/tmp/server_root
-ErrorLog logs/error_log_8888
-TransferLog logs/access_log_8888
-ErrorDiskLog logs/error_disk_log_8888
-ErrorDiskLogSize 200000 10
-TransferDiskLog logs/access_disk_log_8888
-TransferDiskLogSize 200000 10
-MaxClients 150
-DocumentRoot /var/tmp/server_root/htdocs
-DirectoryIndex index.html welcome.html
-DefaultType text/plain
-Alias /icons/ /var/tmp/server_root/icons/
-Alias /pics/ /var/tmp/server_root/icons/
-ScriptAlias /cgi-bin/ /var/tmp/server_root/cgi-bin/
-ScriptAlias /htbin/ /var/tmp/server_root/cgi-bin/
-ErlScriptAlias /cgi-bin/erl httpd_example io
-EvalScriptAlias /eval httpd_example io
-#Script HEAD /cgi-bin/printenv.sh
-#Action image/gif /cgi-bin/printenv.sh
-
-<Directory /var/tmp/server_root/htdocs/open>
-AuthName Open Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret>
-AuthName Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret/top_secret>
-AuthName Top Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group3
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_open>
-AuthName Open Area
-AuthMnesiaDB On
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret>
-AuthName Secret Area
-AuthMnesiaDB On
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret/top_secret>
-AuthName Top Secret Area
-AuthMnesiaDB On
-require group group3
-</Directory>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/httpd.conf b/lib/inets/test/old_httpd_SUITE_data/server_root/conf/httpd.conf
deleted file mode 100644
index 3add93cd73..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/httpd.conf
+++ /dev/null
@@ -1,269 +0,0 @@
-#
-# %CopyrightBegin%
-# 
-# Copyright Ericsson AB 1997-2017. All Rights Reserved.
-# 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# 
-# %CopyrightEnd%
-#
-#
-
-# Port: The port the standalone listens to. For ports < 1023, you will
-# need httpd to be run as root initially.
-
-Port 8888
-
-# BindAddress: This directive is used to tell the server which IP address
-# to listen to. It can either contain "*", an IP address, or a fully
-# qualified Internet domain name.
-# 
-# It is also possible to specify the ip-family with the directive.
-# There ar three possible value: inet, inet6 and inet6fb4
-# inet:     Use IpFamily inet when retreiving the address and
-#           fail if that does not work.
-# inet6:    Use IpFamily inet6 when retreiving the address and
-#           fail if that does not work.
-# inet6fb4: First IpFamily inet6 is tried and if that does not work, 
-#           inet is used as fallback. 
-# Default value for ip-family is inet6fb4
-# 
-# The syntax is: <address>[|<ip-family>]
-#
-#BindAddress *
-#BindAddress *|inet
-
-
-# ServerName allows you to set a host name which is sent back to clients for
-# your server if it's different than the one the program would get (i.e. use
-# "www" instead of the host's real name).
-#
-# Note: You cannot just invent host names and hope they work. The name you 
-# define here must be a valid DNS name for your host. If you don't understand
-# this, ask your network administrator.
-
-#ServerName your.server.net
-
-# SocketType is either ip_comm, sockets or ssl.
-
-SocketType ip_comm
-
-# Modules: Server run-time plug-in modules written using the Erlang
-# Web Server API (EWSAPI). The server API make it easy to add functionality
-# to the server. Read more about EWSAPI in the Reference Manual.
-# WARNING! Do not tamper with this directive unless you are familiar with
-# EWSAPI.
-
-Modules mod_alias mod_auth mod_esi mod_actions mod_cgi mod_responsecontrol mod_trace mod_range mod_head mod_dir mod_get mod_log mod_disk_log
-
-# ServerAdmin: Your address, where problems with the server should be
-# e-mailed.
-
-ServerAdmin [email protected]
-
-# ServerRoot: The directory the server's config, error, and log files
-# are kept in
-
-ServerRoot /var/tmp/server_root
-
-# ErrorLog: The location of the error log file. If this does not start
-# with /, ServerRoot is prepended to it.
-
-ErrorLog logs/error_log
-
-# TransferLog: The location of the transfer log file. If this does not
-# start with /, ServerRoot is prepended to it.
-
-TransferLog logs/access_log
-
-# SecurityLog: The location of the security log file (mod_security required)
-#
-SecurityLog logs/security_log
-
-# ErrorDiskLog: The location of the error log file. If this does not
-# start with /, ServerRoot is prepended to it. This log file is managed
-# with the disk_log module [See disk_log(3)]. The ErrorDiskLogSize directive
-# takes two argument, i.e. MaxBytes and MaxFiles. The wrap log writes at most
-# MaxBytes bytes on each file, and it uses MaxFiles files before it wraps, and
-# truncates the first file.
-
-ErrorDiskLog logs/error_disk_log
-ErrorDiskLogSize 200000 10
-
-# TransferDiskLog: The location of the transfer log file. If this does not
-# start with /, ServerRoot is prepended to it. This log file is managed
-# with the disk_log module [See disk_log(3)]. The TransferDiskLogSize directive
-# takes two argument, i.e. MaxBytes and MaxFiles. The wrap log writes at most
-# MaxBytes bytes on each file, and it uses MaxFiles files before it wraps, and
-# truncates the first file.
-
-TransferDiskLog logs/access_disk_log
-TransferDiskLogSize 200000 10
-
-# SecurityDiskLog: The location of the security log file. If this does not
-# start with /, ServerRoot is prepended to it. This log file is managed
-# with the disk_log module [See disk_log(3)]. The SecurityDiskLogSize directive
-# takes two argument, i.e. MaxBytes and MaxFiles. The wrap log writes at most
-# MaxBytes bytes on each file, and it uses MaxFiles files before it wraps, and
-# truncates the first file.
-
-SecurityDiskLog logs/security_disk_log
-SecurityDiskLogSize 200000 10
-
-# Limit on total number of servers running, i.e., limit on the number
-# of clients who can simultaneously connect --- if this limit is ever
-# reached, clients will be LOCKED OUT, so it should NOT BE SET TOO LOW.
-# It is intended mainly as a brake to keep a runaway server from taking
-# the server with it as it spirals down...
-
-MaxClients 50
-
-# KeepAlive set the flag for persistent connections. For persistent connections
-# set KeepAlive to on. To use One request per connection set the flag to off
-# Note: The value has changed since previous version of INETS.
-KeepAlive on
-
-# KeepAliveTimeout sets the number of seconds before a persistent connection
-# times out and closes.
-KeepAliveTimeout 10
-
-# MaxKeepAliveRequests sets the number of seconds before a persistent connection
-# times out and closes.
-MaxKeepAliveRequests 10
-
-
-
-# DocumentRoot: The directory out of which you will serve your
-# documents. By default, all requests are taken from this directory, but
-# symbolic links and aliases may be used to point to other locations.
-
-DocumentRoot /var/tmp/server_root/htdocs
-
-# DirectoryIndex: Name of the file or files to use as a pre-written HTML
-# directory index.  Separate multiple entries with spaces.
-
-DirectoryIndex index.html welcome.html
-
-# DefaultType is the default MIME type for documents which the server
-# cannot find the type of from filename extensions.
-
-DefaultType text/plain
-
-# Aliases: Add here as many aliases as you need (with no limit). The format is 
-# Alias fakename realname
-
-Alias /icons/ /var/tmp/server_root/icons/
-Alias /pics/ /var/tmp/server_root/icons/
-
-# ScriptAlias: This controls which directories contain server scripts.
-# Format: ScriptAlias fakename realname
-
-ScriptAlias /cgi-bin/ /var/tmp/server_root/cgi-bin/
-ScriptAlias /htbin/ /var/tmp/server_root/cgi-bin/
-
-# This directive adds an action, which will activate cgi-script when a
-# file is requested using the method of method, which can be one of
-# GET, POST and HEAD. It sends the URL and file path of the requested
-# document using the standard CGI PATH_INFO and PATH_TRANSLATED
-# environment variables.
-
-#Script HEAD /cgi-bin/printenv.sh
-
-# This directive adds an action, which will activate cgi-script when a
-# file of content type mime-type is requested. It sends the URL and
-# file path of the requested document using the standard CGI PATH_INFO
-# and PATH_TRANSLATED environment variables.
-
-#Action image/gif /cgi-bin/printenv.sh
-
-# ErlScriptAlias: This specifies how "Erl" server scripts are called.
-# Format: ErlScriptAlias fakename realname allowed_modules
-
-ErlScriptAlias /down/erl httpd_example io
-
-# EvalScriptAlias: This specifies how "Eval" server scripts are called.
-# Format: EvalScriptAlias fakename realname allowed_modules
-
-EvalScriptAlias /eval httpd_example io
-
-# Point SSLCertificateFile at a PEM encoded certificate.
-
-SSLCertificateFile /var/tmp/server_root/ssl/ssl_server.pem
-
-# If the key is not combined with the certificate, use this directive to
-# point at the key file.
-
-SSLCertificateKeyFile /var/tmp/server_root/ssl/ssl_server.pem
-
-# Set SSLVerifyClient to:
-# 0 if no certicate is required
-# 1 if the client may present a valid certificate
-# 2 if the client must present a valid certificate
-# 3 if the client may present a valid certificate but it is not required to
-#   have a valid CA
-
-SSLVerifyClient 0
-
-# Each directory to which INETS has access, can be configured with respect
-# to which services and features are allowed and/or disabled in that
-# directory (and its subdirectories). 
-
-<Directory /var/tmp/server_root/htdocs/open>
-AuthDBType plain
-AuthName Open Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret>
-AuthDBType plain
-AuthName Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret/top_secret>
-AuthDBType plain
-AuthName Top Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group3
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_open>
-AuthDBType mnesia
-AuthName Open Area
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret>
-AuthDBType mnesia
-AuthName Secret Area
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret/top_secret>
-AuthDBType mnesia
-AuthName Top Secret Area
-require group group3
-allow from 130.100.34 130.100.35
-deny from 100.234.22.12 194.100.34.1 130.100.34.25
-SecurityDataFile logs/security_data
-SecurityMaxRetries 3
-SecurityBlockTime 10
-SecurityFailExpireTime 1
-SecurityAuthTimeout 1
-SecurityCallbackModule security_callback
-</Directory>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/mime.types b/lib/inets/test/old_httpd_SUITE_data/server_root/conf/mime.types
deleted file mode 100644
index d2f81e4e5e..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/mime.types
+++ /dev/null
@@ -1,465 +0,0 @@
-# This is a comment. I love comments.
-
-# MIME type			Extension
-application/EDI-Consent
-application/EDI-X12
-application/EDIFACT
-application/activemessage
-application/andrew-inset	ez
-application/applefile
-application/atomicmail
-application/batch-SMTP
-application/beep+xml
-application/cals-1840
-application/commonground
-application/cybercash
-application/dca-rft
-application/dec-dx
-application/dvcs
-application/eshop
-application/http
-application/hyperstudio
-application/iges
-application/index
-application/index.cmd
-application/index.obj
-application/index.response
-application/index.vnd
-application/iotp
-application/ipp
-application/isup
-application/font-tdpfr
-application/mac-binhex40	hqx
-application/mac-compactpro	cpt
-application/macwriteii
-application/marc
-application/mathematica
-application/mathematica-old
-application/msword		doc
-application/news-message-id
-application/news-transmission
-application/ocsp-request
-application/ocsp-response
-application/octet-stream	bin dms lha lzh exe class so dll
-application/oda			oda
-application/parityfec
-application/pdf			pdf
-application/pgp-encrypted
-application/pgp-keys
-application/pgp-signature
-application/pkcs10
-application/pkcs7-mime
-application/pkcs7-signature
-application/pkix-cert
-application/pkix-crl
-application/pkixcmp
-application/postscript		ai eps ps
-application/prs.alvestrand.titrax-sheet
-application/prs.cww
-application/prs.nprend
-application/qsig
-application/remote-printing
-application/riscos
-application/rtf
-application/sdp
-application/set-payment
-application/set-payment-initiation
-application/set-registration
-application/set-registration-initiation
-application/sgml
-application/sgml-open-catalog
-application/sieve
-application/slate
-application/smil		smi smil
-application/timestamp-query
-application/timestamp-reply
-application/vemmi
-application/vnd.3M.Post-it-Notes
-application/vnd.FloGraphIt
-application/vnd.accpac.simply.aso
-application/vnd.accpac.simply.imp
-application/vnd.acucobol
-application/vnd.aether.imp
-application/vnd.anser-web-certificate-issue-initiation
-application/vnd.anser-web-funds-transfer-initiation
-application/vnd.audiograph
-application/vnd.businessobjects
-application/vnd.bmi
-application/vnd.canon-cpdl
-application/vnd.canon-lips
-application/vnd.claymore
-application/vnd.commerce-battelle
-application/vnd.commonspace
-application/vnd.comsocaller
-application/vnd.contact.cmsg
-application/vnd.cosmocaller
-application/vnd.cups-postscript
-application/vnd.cups-raster
-application/vnd.cups-raw
-application/vnd.ctc-posml
-application/vnd.cybank
-application/vnd.dna
-application/vnd.dpgraph
-application/vnd.dxr
-application/vnd.ecdis-update
-application/vnd.ecowin.chart
-application/vnd.ecowin.filerequest
-application/vnd.ecowin.fileupdate
-application/vnd.ecowin.series
-application/vnd.ecowin.seriesrequest
-application/vnd.ecowin.seriesupdate
-application/vnd.enliven
-application/vnd.epson.esf
-application/vnd.epson.msf
-application/vnd.epson.quickanime
-application/vnd.epson.salt
-application/vnd.epson.ssf
-application/vnd.ericsson.quickcall
-application/vnd.eudora.data
-application/vnd.fdf
-application/vnd.ffsns
-application/vnd.framemaker
-application/vnd.fsc.weblaunch
-application/vnd.fujitsu.oasys
-application/vnd.fujitsu.oasys2
-application/vnd.fujitsu.oasys3
-application/vnd.fujitsu.oasysgp
-application/vnd.fujitsu.oasysprs
-application/vnd.fujixerox.ddd
-application/vnd.fujixerox.docuworks
-application/vnd.fujixerox.docuworks.binder
-application/vnd.fut-misnet
-application/vnd.grafeq
-application/vnd.groove-account
-application/vnd.groove-identity-message
-application/vnd.groove-injector
-application/vnd.groove-tool-message
-application/vnd.groove-tool-template
-application/vnd.groove-vcard
-application/vnd.hhe.lesson-player
-application/vnd.hp-HPGL
-application/vnd.hp-PCL
-application/vnd.hp-PCLXL
-application/vnd.hp-hpid
-application/vnd.hp-hps
-application/vnd.httphone
-application/vnd.hzn-3d-crossword
-application/vnd.ibm.afplinedata
-application/vnd.ibm.MiniPay
-application/vnd.ibm.modcap
-application/vnd.informix-visionary
-application/vnd.intercon.formnet
-application/vnd.intertrust.digibox
-application/vnd.intertrust.nncp
-application/vnd.intu.qbo
-application/vnd.intu.qfx
-application/vnd.irepository.package+xml
-application/vnd.is-xpr
-application/vnd.japannet-directory-service
-application/vnd.japannet-jpnstore-wakeup
-application/vnd.japannet-payment-wakeup
-application/vnd.japannet-registration
-application/vnd.japannet-registration-wakeup
-application/vnd.japannet-setstore-wakeup
-application/vnd.japannet-verification
-application/vnd.japannet-verification-wakeup
-application/vnd.koan
-application/vnd.lotus-1-2-3
-application/vnd.lotus-approach
-application/vnd.lotus-freelance
-application/vnd.lotus-notes
-application/vnd.lotus-organizer
-application/vnd.lotus-screencam
-application/vnd.lotus-wordpro
-application/vnd.mcd
-application/vnd.mediastation.cdkey
-application/vnd.meridian-slingshot
-application/vnd.mif		mif
-application/vnd.minisoft-hp3000-save
-application/vnd.mitsubishi.misty-guard.trustweb
-application/vnd.mobius.daf
-application/vnd.mobius.dis
-application/vnd.mobius.msl
-application/vnd.mobius.plc
-application/vnd.mobius.txf
-application/vnd.motorola.flexsuite
-application/vnd.motorola.flexsuite.adsi
-application/vnd.motorola.flexsuite.fis
-application/vnd.motorola.flexsuite.gotap
-application/vnd.motorola.flexsuite.kmr
-application/vnd.motorola.flexsuite.ttc
-application/vnd.motorola.flexsuite.wem
-application/vnd.mozilla.xul+xml
-application/vnd.ms-artgalry
-application/vnd.ms-asf
-application/vnd.ms-excel	xls
-application/vnd.ms-lrm
-application/vnd.ms-powerpoint	ppt
-application/vnd.ms-project
-application/vnd.ms-tnef
-application/vnd.ms-works
-application/vnd.mseq
-application/vnd.msign
-application/vnd.music-niff
-application/vnd.musician
-application/vnd.netfpx
-application/vnd.noblenet-directory
-application/vnd.noblenet-sealer
-application/vnd.noblenet-web
-application/vnd.novadigm.EDM
-application/vnd.novadigm.EDX
-application/vnd.novadigm.EXT
-application/vnd.osa.netdeploy
-application/vnd.palm
-application/vnd.pg.format
-application/vnd.pg.osasli
-application/vnd.powerbuilder6
-application/vnd.powerbuilder6-s
-application/vnd.powerbuilder7
-application/vnd.powerbuilder7-s
-application/vnd.powerbuilder75
-application/vnd.powerbuilder75-s
-application/vnd.previewsystems.box
-application/vnd.publishare-delta-tree
-application/vnd.pvi.ptid1
-application/vnd.pwg-xhtml-print+xml
-application/vnd.rapid
-application/vnd.s3sms
-application/vnd.seemail
-application/vnd.shana.informed.formdata
-application/vnd.shana.informed.formtemplate
-application/vnd.shana.informed.interchange
-application/vnd.shana.informed.package
-application/vnd.sss-cod
-application/vnd.sss-dtf
-application/vnd.sss-ntf
-application/vnd.street-stream
-application/vnd.svd
-application/vnd.swiftview-ics
-application/vnd.triscape.mxs
-application/vnd.trueapp
-application/vnd.truedoc
-application/vnd.tve-trigger
-application/vnd.ufdl
-application/vnd.uplanet.alert
-application/vnd.uplanet.alert-wbxml
-application/vnd.uplanet.bearer-choice-wbxml
-application/vnd.uplanet.bearer-choice
-application/vnd.uplanet.cacheop
-application/vnd.uplanet.cacheop-wbxml
-application/vnd.uplanet.channel
-application/vnd.uplanet.channel-wbxml
-application/vnd.uplanet.list
-application/vnd.uplanet.list-wbxml
-application/vnd.uplanet.listcmd
-application/vnd.uplanet.listcmd-wbxml
-application/vnd.uplanet.signal
-application/vnd.vcx
-application/vnd.vectorworks
-application/vnd.vidsoft.vidconference
-application/vnd.visio
-application/vnd.vividence.scriptfile
-application/vnd.wap.sic
-application/vnd.wap.slc
-application/vnd.wap.wbxml	wbxml
-application/vnd.wap.wmlc	wmlc
-application/vnd.wap.wmlscriptc	wmlsc
-application/vnd.webturbo
-application/vnd.wrq-hp3000-labelled
-application/vnd.wt.stf
-application/vnd.xara
-application/vnd.xfdl
-application/vnd.yellowriver-custom-menu
-application/whoispp-query
-application/whoispp-response
-application/wita
-application/wordperfect5.1
-application/x-bcpio		bcpio
-application/x-cdlink		vcd
-application/x-chess-pgn		pgn
-application/x-compress
-application/x-cpio		cpio
-application/x-csh		csh
-application/x-director		dcr dir dxr
-application/x-dvi		dvi
-application/x-futuresplash	spl
-application/x-gtar		gtar
-application/x-gzip
-application/x-hdf		hdf
-application/x-javascript	js
-application/x-koan		skp skd skt skm
-application/x-latex		latex
-application/x-netcdf		nc cdf
-application/x-sh		sh
-application/x-shar		shar
-application/x-shockwave-flash	swf
-application/x-stuffit		sit
-application/x-sv4cpio		sv4cpio
-application/x-sv4crc		sv4crc
-application/x-tar		tar
-application/x-tcl		tcl
-application/x-tex		tex
-application/x-texinfo		texinfo texi
-application/x-troff		t tr roff
-application/x-troff-man		man
-application/x-troff-me		me
-application/x-troff-ms		ms
-application/x-ustar		ustar
-application/x-wais-source	src
-application/x400-bp
-application/xml
-application/xml-dtd
-application/xml-external-parsed-entity
-application/zip			zip
-audio/32kadpcm
-audio/basic			au snd
-audio/g.722.1
-audio/l16
-audio/midi			mid midi kar
-audio/mp4a-latm
-audio/mpa-robust
-audio/mpeg			mpga mp2 mp3
-audio/parityfec
-audio/prs.sid
-audio/telephone-event
-audio/tone
-audio/vnd.cisco.nse
-audio/vnd.cns.anp1
-audio/vnd.cns.inf1
-audio/vnd.digital-winds
-audio/vnd.everad.plj
-audio/vnd.lucent.voice
-audio/vnd.nortel.vbk
-audio/vnd.nuera.ecelp4800
-audio/vnd.nuera.ecelp7470
-audio/vnd.nuera.ecelp9600
-audio/vnd.octel.sbc
-audio/vnd.qcelp
-audio/vnd.rhetorex.32kadpcm
-audio/vnd.vmx.cvsd
-audio/x-aiff			aif aiff aifc
-audio/x-mpegurl			m3u
-audio/x-pn-realaudio		ram rm
-audio/x-pn-realaudio-plugin	rpm
-audio/x-realaudio		ra
-audio/x-wav			wav
-chemical/x-pdb			pdb
-chemical/x-xyz			xyz
-image/bmp			bmp
-image/cgm
-image/g3fax
-image/gif			gif
-image/ief			ief
-image/jpeg			jpeg jpg jpe
-image/naplps
-image/png			png
-image/prs.btif
-image/prs.pti
-image/tiff			tiff tif
-image/vnd.cns.inf2
-image/vnd.dwg
-image/vnd.dxf
-image/vnd.fastbidsheet
-image/vnd.fpx
-image/vnd.fst
-image/vnd.fujixerox.edmics-mmr
-image/vnd.fujixerox.edmics-rlc
-image/vnd.mix
-image/vnd.net-fpx
-image/vnd.svf
-image/vnd.wap.wbmp		wbmp
-image/vnd.xiff
-image/x-cmu-raster		ras
-image/x-portable-anymap		pnm
-image/x-portable-bitmap		pbm
-image/x-portable-graymap	pgm
-image/x-portable-pixmap		ppm
-image/x-rgb			rgb
-image/x-xbitmap			xbm
-image/x-xpixmap			xpm
-image/x-xwindowdump		xwd
-message/delivery-status
-message/disposition-notification
-message/external-body
-message/http
-message/news
-message/partial
-message/rfc822
-message/s-http
-model/iges			igs iges
-model/mesh			msh mesh silo
-model/vnd.dwf
-model/vnd.flatland.3dml
-model/vnd.gdl
-model/vnd.gs-gdl
-model/vnd.gtw
-model/vnd.mts
-model/vnd.vtu
-model/vrml			wrl vrml
-multipart/alternative
-multipart/appledouble
-multipart/byteranges
-multipart/digest
-multipart/encrypted
-multipart/form-data
-multipart/header-set
-multipart/mixed
-multipart/parallel
-multipart/related
-multipart/report
-multipart/signed
-multipart/voice-message
-text/calendar
-text/css			css
-text/directory
-text/enriched
-text/html			html htm
-text/parityfec
-text/plain			asc txt
-text/prs.lines.tag
-text/rfc822-headers
-text/richtext			rtx
-text/rtf			rtf
-text/sgml			sgml sgm
-text/tab-separated-values	tsv
-text/t140
-text/uri-list
-text/vnd.DMClientScript
-text/vnd.IPTC.NITF
-text/vnd.IPTC.NewsML
-text/vnd.abc
-text/vnd.curl
-text/vnd.flatland.3dml
-text/vnd.fly
-text/vnd.fmi.flexstor
-text/vnd.in3d.3dml
-text/vnd.in3d.spot
-text/vnd.latex-z
-text/vnd.motorola.reflex
-text/vnd.ms-mediapackage
-text/vnd.wap.si
-text/vnd.wap.sl
-text/vnd.wap.wml		wml
-text/vnd.wap.wmlscript		wmls
-text/x-setext			etx
-text/x-server-parsed-html       shtml
-text/xml			xml xsl
-text/xml-external-parsed-entity
-video/mp4v-es
-video/mpeg			mpeg mpg mpe
-video/parityfec
-video/pointer
-video/quicktime			qt mov
-video/vnd.fvt
-video/vnd.motorola.video
-video/vnd.motorola.videop
-video/vnd.mpegurl		mxu
-video/vnd.mts
-video/vnd.nokia.interleaved-multimedia
-video/vnd.vivo
-video/x-msvideo			avi
-video/x-sgi-movie		movie
-x-conference/x-cooltalk		ice
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/ssl.conf b/lib/inets/test/old_httpd_SUITE_data/server_root/conf/ssl.conf
deleted file mode 100644
index de49ceafd0..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/conf/ssl.conf
+++ /dev/null
@@ -1,66 +0,0 @@
-Port 8088
-#ServerName your.server.net
-SocketType ssl
-Modules mod_alias mod_auth mod_esi mod_actions mod_cgi mod_dir mod_get mod_head mod_log mod_disk_log
-ServerAdmin [email protected]
-ServerRoot /var/tmp/server_root
-ErrorLog logs/error_log_8088
-TransferLog logs/access_log_8088
-ErrorDiskLog logs/error_disk_log_8088
-ErrorDiskLogSize 200000 10
-TransferDiskLog logs/access_disk_log_8088
-TransferDiskLogSize 200000 10
-MaxClients 150
-DocumentRoot /var/tmp/server_root/htdocs
-DirectoryIndex index.html welcome.html
-DefaultType text/plain
-Alias /icons/ /var/tmp/server_root/icons/
-Alias /pics/ /var/tmp/server_root/icons/
-ScriptAlias /cgi-bin/ /var/tmp/server_root/cgi-bin/
-ScriptAlias /htbin/ /var/tmp/server_root/cgi-bin/
-ErlScriptAlias /cgi-bin/erl httpd_example io
-EvalScriptAlias /eval httpd_example io
-SSLCertificateFile /var/tmp/server_root/ssl/ssl_server.pem
-SSLCertificateKeyFile /var/tmp/server_root/ssl/ssl_server.pem
-SSLVerifyClient 0
-#Script HEAD /cgi-bin/printenv.sh
-#Action image/gif /cgi-bin/printenv.sh
-
-<Directory /var/tmp/server_root/htdocs/open>
-AuthName Open Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret>
-AuthName Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/secret/top_secret>
-AuthName Top Secret Area
-AuthUserFile /var/tmp/server_root/auth/passwd
-AuthGroupFile /var/tmp/server_root/auth/group
-require group group3
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_open>
-AuthName Open Area
-AuthMnesiaDB On
-require user one Aladdin
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret>
-AuthName Secret Area
-AuthMnesiaDB On
-require group group1 group2
-</Directory>
-
-<Directory /var/tmp/server_root/htdocs/mnesia_secret/top_secret>
-AuthName Top Secret Area
-AuthMnesiaDB On
-require group group3
-</Directory>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/config.shtml b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/config.shtml
deleted file mode 100644
index 107e3ff610..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/config.shtml
+++ /dev/null
@@ -1,70 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/ssi.html (17-Apr-1997)</TITLE>
-</HEAD>
-<BODY>
-<H1>/ssi.html</H1>
-
-<!-- ************* CONFIG ************* -->
-
-<!--#config timefmt="%a %b %e %T %Z %Y" sizefmt="abbrev"-->
-<!--#config errmsg="[an especially ugly error occurred while processing this directive]"-->
-
-<!-- ************* INCLUDE ************* -->
-
-<P>Include /misc/friedrich.html:
-<!--#include virtual="/misc/friedrich.html"-->
-<P>Include /misc/not_defined.html: <!--#include virtual="/misc/not_defined.html"-->
-<P>Include misc/friedrich.html:
-<!--#include file="misc/friedrich.html"-->
-<P>Include not_defined.html: <!--#include file="not_defined.html"-->
-
-<P><HR>
-
-<!-- ************* ECHO ************* -->
-
-<P>DOCUMENT_NAME: <!--#echo var="DOCUMENT_NAME"-->
-<P>DOCUMENT_URI: <!--#echo var="DOCUMENT_URI"-->
-<P>QUERY_STRING_UNESCAPED: <!--#echo var="QUERY_STRING_UNESCAPED"-->
-<P>DATE_LOCAL: <!--#echo var="DATE_LOCAL"-->
-<P>DATE_GMT: <!--#echo var="DATE_GMT"-->
-<P>LAST_MODIFIED: <!--#echo var="LAST_MODIFIED"-->
-<P>NOT_DEFINED: <!--#echo var="NOT_DEFINED"-->
-
-<P><HR>
-
-<!-- ************* FSIZE ************* -->
-
-<P>Size of index.html: <!--#fsize file="index.html"-->
-<P>Size of not_defined.html: <!--#fsize file="not_defined.html"-->
-<!--#config sizefmt="bytes"-->
-<P>Size of /misc/friedrich.html: <!--#fsize virtual="/misc/friedrich.html"-->
-<P>Size of /misc/not_defined.html: <!--#fsize virtual="/misc/not_defined.html"-->
-
-<P><HR>
-
-<!-- ************* FLASTMOD ************* -->
-
-<P>Last modification of index.html: <!--#flastmod file="index.html"-->
-<P>Last modification of not_defined.html: <!--#flastmod file="not_defined.html"-->
-<P>Last modification of /misc/friedrich.html: <!--#flastmod virtual="/misc/friedrich.html"-->
-<P>Last modification of /misc/not_defined.html: <!--#flastmod virtual="/misc/not_defined.html"-->
-
-<!--#exec cmd="ls"-->
-<!--#exec cmd="printenv"-->
-<!--#exec cmd="sunemaja"-->
-
-<!--#exec cgi="/cgi-bin/printenv.sh"-->
-
-</BODY>
-</HTML>
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_open/dummy.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_open/dummy.html
deleted file mode 100644
index a6e8a35a04..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_open/dummy.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/open/dummy.html (17-Apr-1997)</TITLE>
-<!-- Created by: Joakim Greben�, 17-Apr-1997 -->
-<!-- Changed by: Joakim Greben�, 17-Apr-1997 -->
-</HEAD>
-<BODY>
-<H1>/open/dummy.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_secret/dummy.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_secret/dummy.html
deleted file mode 100644
index 016b04e540..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_secret/dummy.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/secret/dummy.html (17-Apr-1997)</TITLE>
-<!-- Created by: Joakim Greben�, 17-Apr-1997 -->
-<!-- Changed by: Joakim Greben�, 17-Apr-1997 -->
-</HEAD>
-<BODY>
-<H1>/secret/dummy.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_secret/top_secret/index.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_secret/top_secret/index.html
deleted file mode 100644
index 34db3d5d1a..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/dets_secret/top_secret/index.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/secret/top_secret/index.html (04-Feb-1998)</TITLE>
-<!-- Created by: Mattias Nilsson, 04-Feb-1998 -->
-</HEAD>
-<BODY>
-<H1>/secret/top_secret/index.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/echo.shtml b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/echo.shtml
deleted file mode 100644
index 141db5be59..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/echo.shtml
+++ /dev/null
@@ -1,35 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/echo.shtml</TITLE>
-</HEAD>
-<BODY>
-<H1>/echo.shtml</H1>
-
-<P>DOCUMENT_NAME: <!--#echo var="DOCUMENT_NAME"-->
-
-<P>DOCUMENT_URI: <!--#echo var="DOCUMENT_URI"-->
-
-<P>QUERY_STRING_UNESCAPED: <!--#echo var="QUERY_STRING_UNESCAPED"-->
-
-<P>DATE_LOCAL: <!--#echo var="DATE_LOCAL"-->
-
-<P>DATE_GMT: <!--#echo var="DATE_GMT"-->
-
-<P>LAST_MODIFIED: <!--#echo var="LAST_MODIFIED"-->
-
-<P>NOT_DEFINED: <!--#echo var="NOT_DEFINED"-->
-
-<P>[<A HREF="ssi.html">Back</A>]
-
-</BODY>
-</HTML>
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/exec.shtml b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/exec.shtml
deleted file mode 100644
index 97333da898..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/exec.shtml
+++ /dev/null
@@ -1,30 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/exec.shtml</TITLE>
-</HEAD>
-<BODY>
-<H1>/exec.shtml</H1>
-<PRE>
-<!--#exec cmd="ls"-->
-<HR>
-<!--#exec cmd="printenv"-->
-<HR>
-<!--#exec cmd="sunemaja"-->
-<HR>
-<!--#exec cgi="/cgi-bin/printenv.sh"-->
-</PRE>
-
-<P>[<A HREF="ssi.html">Back</A>]
-
-</BODY>
-</HTML>
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/flastmod.shtml b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/flastmod.shtml
deleted file mode 100644
index d54c36fe50..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/flastmod.shtml
+++ /dev/null
@@ -1,29 +0,0 @@
-<HTML>
-<HEAD>	
-<TITLE>/flastmod.shtml</TITLE>
-</HEAD>
-<BODY>
-<H1>/flastmod.shtml</H1>
-
-<P>Last modification of index.html: <!--#flastmod file="index.html"-->
-
-<P>Last modification of not_defined.html: <!--#flastmod file="not_defined.html"-->
-
-<P>Last modification of /misc/friedrich.html: <!--#flastmod virtual="/misc/friedrich.html"-->
-
-<P>Last modification of /misc/not_defined.html: <!--#flastmod virtual="/misc/not_defined.html"-->
-
-<P>[<A HREF="ssi.html">Back</A>]
-
-</BODY>
-</HTML>
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/fsize.shtml b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/fsize.shtml
deleted file mode 100644
index 570ee9cf6d..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/fsize.shtml
+++ /dev/null
@@ -1,29 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/fsize.shtml</TITLE>
-</HEAD>
-<BODY>
-<H1>/fsize.shtml</H1>
-
-<P>Size of index.html: <!--#fsize file="index.html"-->
-
-<P>Size of not_defined.html: <!--#fsize file="not_defined.html"-->
-
-<P>Size of /misc/friedrich.html: <!--#fsize virtual="/misc/friedrich.html"-->
-
-<P>Size of /misc/not_defined.html: <!--#fsize virtual="/misc/not_defined.html"-->
-
-<P>[<A HREF="ssi.html">Back</A>]
-
-</BODY>
-</HTML>
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/include.shtml b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/include.shtml
deleted file mode 100644
index 529aad0437..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/include.shtml
+++ /dev/null
@@ -1,33 +0,0 @@
-<HTML>
-<HEAD>	
-<TITLE>/include.shtml</TITLE>
-</HEAD>
-<BODY>
-<H1>/include.shtml</H1>
-
-<P>Include /misc/friedrich.html:
-<!--#include virtual="/misc/friedrich.html"-->
-
-<P>Include /misc/not_defined.html:
-<!--#include virtual="/misc/not_defined.html"-->
-
-<P>Include misc/friedrich.html:
-<!--#include file="misc/friedrich.html"-->
-
-<P>Include not_defined.html:
-<!--#include file="not_defined.html"-->
-
-<P>[<A HREF="ssi.html">Back</A>]
-
-</BODY>
-</HTML>
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/index.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/index.html
deleted file mode 100644
index cfdc9f9ab7..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/index.html
+++ /dev/null
@@ -1,25 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/index.html</TITLE>
-</HEAD>
-<BODY>
-<H1>/index.html</H1>
-
-<STRONG>Server-Side Include (SSI) commands:</STRONG><BR>
-<A HREF="config.shtml">config</A><BR>
-<A HREF="echo.shtml">echo</A><BR>
-<A HREF="exec.shtml">exec</A><BR>
-<A HREF="flastmod.shtml">flastmod</A><BR>
-<A HREF="fsize.shtml">fsize</A><BR>
-<A HREF="include.shtml">include</A><BR>
-
-<BR>
-<BR>
-
-<STRONG>ESI callback:</STRING><BR>
-<A HREF="cgi-bin/erl/httpd_example/get">cgi-bin/erl/httpd_example/get</A><BR>
-<A HREF="cgi-bin/erl/httpd_example/yahoo">cgi-bin/erl/httpd_example/yahoo</A><BR>
-<A HREF="cgi-bin/erl/httpd_example/test1">cgi-bin/erl/httpd_example/test1</A><BR>
-
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/last_modified.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/last_modified.html
deleted file mode 100644
index 65c1790813..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/last_modified.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/last_modified.html</TITLE>
-</HEAD>
-<BODY>
-<H1>/last_modified.html</H1>
-
-<P>This document is only used for test of illegal last-modified date.</P>
-
-
-</BODY>
-</HTML>
-
-
-
-
-
-
-
-
-
-
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/friedrich.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/friedrich.html
deleted file mode 100644
index d7953d5df4..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/friedrich.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<P><CITE>
-Talking much about oneself can also be a means to conceal oneself.<BR>
--- Friedrich Nietzsche
-</CITE>
-
-<P>Nested Include:
-<!--#include file="misc/oech.html"-->
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/oech.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/oech.html
deleted file mode 100644
index 506064bf04..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/oech.html
+++ /dev/null
@@ -1,4 +0,0 @@
-<P><CITE>
-What excuses stand in your way?  How can you eliminate them?<BR>
--- Roger von Oech
-</CITE>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/welcome.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/welcome.html
deleted file mode 100644
index 8c17451f91..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/misc/welcome.html
+++ /dev/null
@@ -1 +0,0 @@
-<HTML></HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_open/dummy.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_open/dummy.html
deleted file mode 100644
index a6e8a35a04..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_open/dummy.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/open/dummy.html (17-Apr-1997)</TITLE>
-<!-- Created by: Joakim Greben�, 17-Apr-1997 -->
-<!-- Changed by: Joakim Greben�, 17-Apr-1997 -->
-</HEAD>
-<BODY>
-<H1>/open/dummy.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_secret/dummy.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_secret/dummy.html
deleted file mode 100644
index 016b04e540..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_secret/dummy.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/secret/dummy.html (17-Apr-1997)</TITLE>
-<!-- Created by: Joakim Greben�, 17-Apr-1997 -->
-<!-- Changed by: Joakim Greben�, 17-Apr-1997 -->
-</HEAD>
-<BODY>
-<H1>/secret/dummy.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_secret/top_secret/index.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_secret/top_secret/index.html
deleted file mode 100644
index 2d17e8b596..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/mnesia_secret/top_secret/index.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/mnesia_secret/top_secret/index.html (04-Feb-1998)</TITLE>
-<!-- Created by: Mattias Nilsson, 04-Feb-1998 -->
-</HEAD>
-<BODY>
-<H1>/mnesia_secret/top_secret/index.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/open/dummy.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/open/dummy.html
deleted file mode 100644
index a6e8a35a04..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/open/dummy.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/open/dummy.html (17-Apr-1997)</TITLE>
-<!-- Created by: Joakim Greben�, 17-Apr-1997 -->
-<!-- Changed by: Joakim Greben�, 17-Apr-1997 -->
-</HEAD>
-<BODY>
-<H1>/open/dummy.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/secret/dummy.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/secret/dummy.html
deleted file mode 100644
index 016b04e540..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/secret/dummy.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/secret/dummy.html (17-Apr-1997)</TITLE>
-<!-- Created by: Joakim Greben�, 17-Apr-1997 -->
-<!-- Changed by: Joakim Greben�, 17-Apr-1997 -->
-</HEAD>
-<BODY>
-<H1>/secret/dummy.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/secret/top_secret/index.html b/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/secret/top_secret/index.html
deleted file mode 100644
index 34db3d5d1a..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/htdocs/secret/top_secret/index.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<HTML>
-<HEAD>
-<TITLE>/secret/top_secret/index.html (04-Feb-1998)</TITLE>
-<!-- Created by: Mattias Nilsson, 04-Feb-1998 -->
-</HEAD>
-<BODY>
-<H1>/secret/top_secret/index.html</H1>
-</BODY>
-</HTML>
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/README b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/README
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@@ -1,161 +0,0 @@
-Public Domain Icons
-
-     These icons were originally made for Mosaic for X and have been
-     included in the NCSA httpd and Apache server distributions in the
-     past. They are in the public domain and may be freely included in any
-     application. The originals were done by Kevin Hughes ([email protected]).
-
-     Many thanks to Andy Polyakov for tuning the icon colors and adding a
-     few new images. If you'd like to contribute additions or ideas to
-     this set, please let me know.
-
-     The distribution site for these icons is at:
-
-          http://www.eit.com/goodies/www.icons/
-
-     Kevin Hughes
-     September 11, 1995
-
-
-Suggested Uses
-
-The following are a few suggestions, to serve as a starting point for ideas.
-Please feel free to tweak and rename the icons as you like.
-
-     a.gif
-          This might be used to represent PostScript or text layout
-          languages.
-
-     alert.black.gif, alert.red.gif
-          These can be used to highlight any important items, such as a
-          README file in a directory.
-
-     back.gif, forward.gif
-          These can be used as links to go to previous and next areas.
-
-     ball.gray.gif, ball.red.gif
-          These might be used as bullets.
-
-     binary.gif
-          This can be used to represent binary files.
-
-     binhex.gif
-          This can represent BinHex-encoded data.
-
-     blank.gif
-          This can be used as a placeholder or a spacing element.
-
-     bomb.gif
-          This can be used to repreesnt core files.
-
-     box1.gif, box2.gif
-          These icons can be used to represent generic 3D applications and
-          related files.
-
-     broken.gif
-          This can represent corrupted data.
-
-     burst.gif
-          This can call attention to new and important items.
-
-     c.gif
-          This might represent C source code.
-
-     comp.blue.gif, comp.red.gif
-          These little computer icons can stand for telnet or FTP
-          sessions.
-
-     compressed.gif
-          This may represent compressed data.
-
-     continued.gif
-          This can be a link to a continued listing of a directory.
-
-     down.gif, up.gif, left.gif, right.gif
-          These can be used to scroll up, down, left and right in a
-          listing or may be used to denote items in an outline.
-
-     dvi.gif
-          This can represent DVI files.
-
-     f.gif
-          This might represent FORTRAN or Forth source code.
-
-     folder.gif, folder.open.gif, folder.sec.gif
-          The folder can represent directories. There is also a version
-          that can represent secure directories or directories that cannot
-          be viewed.
-
-     generic.gif, generic.sec.gif, generic.red.gif
-          These can represent generic files, secure files, and important
-          files, respectively.
-
-     hand.right.gif, hand.up.gif
-          These can point out important items (pun intended).
-
-     image1.gif, image2.gif, image3.gif
-          These can represent image formats of various types.
-
-     index.gif
-          This might represent a WAIS index or search facility.
-
-     layout.gif
-          This might represent files and formats that contain graphics as
-          well as text layout, such as HTML and PDF files.
-
-     link.gif
-          This might represent files that are symbolic links.
-
-     movie.gif
-          This can represent various movie formats.
-
-     p.gif
-          This may stand for Perl or Python source code.
-
-     pie0.gif ... pie8.gif
-          These icons can be used in applications where a list of
-          documents is returned from a search. The little pie chart images
-          can denote how relevant the documents may be to your search
-          query.
-
-     patch.gif
-          This may stand for patches and diff files.
-
-     portal.gif
-          This might be a link to an online service or a 3D world.
-
-     ps.gif, quill.gif
-          These may represent PostScript files.
-
-     screw1.gif, screw2.gif
-          These may represent CAD or engineering data and formats.
-
-     script.gif
-          This can represent any of various interpreted languages, such as
-          Perl, python, TCL, and shell scripts, as well as server
-          configuration files.
-
-     sound1.gif, sound2.gif
-          These can represent sound files.
-
-     sphere1.gif, sphere2.gif
-          These can represent 3D worlds or rendering applications and
-          formats.
-
-     tex.gif
-          This can represent TeX files.
-
-     text.gif
-          This can represent generic (plain) text files.
-
-     transfer.gif
-          This can represent FTP transfers or uploads/downloads.
-
-     unknown.gif
-          This may represent a file of an unknown type.
-
-     uuencoded.gif
-          This can stand for uuencoded data.
-
-     world1.gif, world2.gif
-          These can represent 3D worlds or other 3D formats.
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/a.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/a.gif
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--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/left.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/link.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/link.gif
deleted file mode 100644
index c5b6889a76..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/link.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/movie.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/movie.gif
deleted file mode 100644
index 0035183774..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/movie.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/p.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/p.gif
deleted file mode 100644
index 7b917b4e91..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/p.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/patch.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/patch.gif
deleted file mode 100644
index 39bc90e795..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/patch.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pdf.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pdf.gif
deleted file mode 100644
index c88fd777c4..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pdf.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie0.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie0.gif
deleted file mode 100644
index 6f7a0ae7a7..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie0.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie1.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie1.gif
deleted file mode 100644
index 03aa6be71e..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie1.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie2.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie2.gif
deleted file mode 100644
index b04c5e0908..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie2.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie3.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie3.gif
deleted file mode 100644
index 4db9d023ed..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie3.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie4.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie4.gif
deleted file mode 100644
index 93471fdd88..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie4.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie5.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie5.gif
deleted file mode 100644
index 57aee93f07..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie5.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie6.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie6.gif
deleted file mode 100644
index 0dc327b569..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie6.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie7.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie7.gif
deleted file mode 100644
index 8661337f06..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie7.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie8.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie8.gif
deleted file mode 100644
index 59ddb34ce0..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/pie8.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/portal.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/portal.gif
deleted file mode 100644
index 0e6e506e00..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/portal.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/poweredby.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/poweredby.gif
deleted file mode 100644
index d324ab80ea..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/poweredby.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/ps.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/ps.gif
deleted file mode 100644
index 0f565bc1db..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/ps.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/quill.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/quill.gif
deleted file mode 100644
index 818a5cdc7e..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/quill.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/right.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/right.gif
deleted file mode 100644
index b256e5f75f..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/right.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/screw1.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/screw1.gif
deleted file mode 100644
index af6ba2b097..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/screw1.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/screw2.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/screw2.gif
deleted file mode 100644
index 06dccb3e44..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/screw2.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/script.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/script.gif
deleted file mode 100644
index d8a853bc58..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/script.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sound1.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sound1.gif
deleted file mode 100644
index 8efb49f55d..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sound1.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sound2.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sound2.gif
deleted file mode 100644
index 48e6a7fb2f..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sound2.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sphere1.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sphere1.gif
deleted file mode 100644
index 7067070da2..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sphere1.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sphere2.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sphere2.gif
deleted file mode 100644
index a9e462a377..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/sphere2.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/star.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/star.gif
deleted file mode 100644
index 4cfe0a5e0f..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/star.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/star_blank.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/star_blank.gif
deleted file mode 100644
index a0c83cb85b..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/star_blank.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/tar.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/tar.gif
deleted file mode 100644
index 617e779efa..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/tar.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/tex.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/tex.gif
deleted file mode 100644
index 45e43233b8..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/tex.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/text.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/text.gif
deleted file mode 100644
index 4c623909fb..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/text.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/transfer.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/transfer.gif
deleted file mode 100644
index 33697dbb66..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/transfer.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/unknown.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/unknown.gif
deleted file mode 100644
index 32b1ea23fb..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/unknown.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/up.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/up.gif
deleted file mode 100644
index 6d6d6d1ebf..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/up.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/uu.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/uu.gif
deleted file mode 100644
index 4387d529f6..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/uu.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/uuencoded.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/uuencoded.gif
deleted file mode 100644
index 4387d529f6..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/uuencoded.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/world1.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/world1.gif
deleted file mode 100644
index 05b4ec2058..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/world1.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/world2.gif b/lib/inets/test/old_httpd_SUITE_data/server_root/icons/world2.gif
deleted file mode 100644
index e3203f7a88..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/icons/world2.gif
+++ /dev/null
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/logs/Dummy_File_Needed_By_WinZip b/lib/inets/test/old_httpd_SUITE_data/server_root/logs/Dummy_File_Needed_By_WinZip
deleted file mode 100644
index 8d1c8b69c3..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/logs/Dummy_File_Needed_By_WinZip
+++ /dev/null
@@ -1 +0,0 @@
- 
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/ssl/ssl_client.pem b/lib/inets/test/old_httpd_SUITE_data/server_root/ssl/ssl_client.pem
deleted file mode 100644
index 427447958d..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/ssl/ssl_client.pem
+++ /dev/null
@@ -1,31 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIICXQIBAAKBgQCTFBPkOO98fDY3j6MIxIGKp+rampfIay50Lx4+EnCnRSSVwC+n
-0VVmP7V5SGFJpuXJzN0hvqPUWOOjiMTNlNRaGy0pqu2oMXWAPLOxHWL1wT53h2Zr
-3FUNU/N0Rvnkttse1KZJ9uYCLKUiuXXsv2rR62nH3OhRIiBHSAcSv0NRWwIDAQAB
-AoGACdIVYe/LTeydUihtInC8lZ2QuPgJmoBNocRjqJFipEihoL4scHAx25n1bBvB
-I0HZphffzBkGp28oBAtl2LRPWXqu527unc/RWRfLMqSK1xNSq1DxD1a30zkrZPna
-QiV65vEJuNSJTtlDy/Zqc/BVZXCpxWlzYQedZgkmf0Qse8ECQQCmaz02Yur8zC9f
-eSQKU5OSzGw3bSIumEzziCfHdTheK6MEoccf5TCAyLXhZwA7QlKja4tFXfeyVxws
-/LlnUJN9AkEA4j+xnOeYUyGKXL5i+BAbnqpI4MzPiq+IoCYkaRlD/wAws24r5HNI
-ZQmEHWqD/NNzOf/A2XuyLtMiTGJPW/DftwJBAKKpJP6Ytuh6xz8BUCnLwO12Y7vV
-LtjuQiCzD3aUa5EYA9HOMqxJPxxRkf0LyR0i2VUkE8+sZiPpov+R0cJa7p0CQQCj
-40GUiArGRSiF7/+e84QeVfl+pb29F1QftiFv5DZmFEwy3Z572KpbTh5edJbxYHY6
-UDHxGHJFCvnwXNJhpkVXAkBJqfEfiMJ3Q/E5Gpf3sQizacouW92iiN8ojlF1oB80
-t34RysJH7SgI3gdMhTribCo2UUaV0StjR6yodPN+TB2J
------END RSA PRIVATE KEY-----
------BEGIN CERTIFICATE-----
-MIIChzCCAfCgAwIBAgIGAIsapa8BMA0GCSqGSIb3DQEBBQUAMHoxDjAMBgNVBAMT
-BW90cENBMSAwHgYJKoZIhvcNAQkBFhF0ZXN0ZXJAZXJsYW5nLm9yZzESMBAGA1UE
-BxMJU3RvY2tob2xtMQswCQYDVQQGEwJTRTEPMA0GA1UEChMGZXJsYW5nMRQwEgYD
-VQQLEwt0ZXN0aW5nIGRlcDAiGA8yMDEwMDkwMTAwMDAwMFoYDzIwMjUwODI4MDAw
-MDAwWjB7MQ8wDQYDVQQDEwZjbGllbnQxIDAeBgkqhkiG9w0BCQEWEXRlc3RlckBl
-cmxhbmcub3JnMRIwEAYDVQQHEwlTdG9ja2hvbG0xCzAJBgNVBAYTAlNFMQ8wDQYD
-VQQKEwZlcmxhbmcxFDASBgNVBAsTC3Rlc3RpbmcgZGVwMIGfMA0GCSqGSIb3DQEB
-AQUAA4GNADCBiQKBgQCTFBPkOO98fDY3j6MIxIGKp+rampfIay50Lx4+EnCnRSSV
-wC+n0VVmP7V5SGFJpuXJzN0hvqPUWOOjiMTNlNRaGy0pqu2oMXWAPLOxHWL1wT53
-h2Zr3FUNU/N0Rvnkttse1KZJ9uYCLKUiuXXsv2rR62nH3OhRIiBHSAcSv0NRWwID
-AQABoxMwETAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBBQUAA4GBAG8t6f1A
-PF7xayGxtUpG2r6W5ETylC3ZIKPS2kfJk9aYi7AZNTp7/xTU6SgqvFBN8aBPzxCD
-4jHrSNC8DSb4X1x9uimarb6qdZDHEdij+DRAd2eygJHZxEf7+8B4Fx34thQeU9hZ
-S1Izke5AlsyFMkvB7h0anE4k9BfuU70vl6v5
------END CERTIFICATE-----
diff --git a/lib/inets/test/old_httpd_SUITE_data/server_root/ssl/ssl_server.pem b/lib/inets/test/old_httpd_SUITE_data/server_root/ssl/ssl_server.pem
deleted file mode 100644
index 4aac86db49..0000000000
--- a/lib/inets/test/old_httpd_SUITE_data/server_root/ssl/ssl_server.pem
+++ /dev/null
@@ -1,31 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIICXQIBAAKBgQCf4Htxr99lLs5W8QQw7jdakqyAkIjOW4aqH8sr4va4SvZ9Adq6
-7k8jMHefCVZo+F8x4cwsBgB4aWzFIGBnvFTi6YsH27XW7f9O9IPCej8fdhRZ4UAt
-NHa253buOWpDGla2JmIdkmfFvXFJycMIKbG5tYilVXoWKBMKmCwWaXz0nQIDAQAB
-AoGAQIlma0r6W6bcRj4+Wd4fXCFvHuq5Psu1fYEeC5Yvz8761xVjjSfbrDHJZ9pm
-FjOEgedK+s5lbDXqYVyjbdyZSugStBRocSmbG8SQHcAsxR2ZIkNzX2hYzB+lslWo
-T3YJojDyB134O7XJznCu+ZFXP86jyJ1JT6k6a+OIHcwnJ+ECQQDYn57dY4Px3mEd
-VBLStN3YkRF5oFyT+xk7IaKeLLB6n4gCnoVbBoHut7PFbPYPzoNzEwPk3MQKDIHb
-Kig3S5CpAkEAvPA1VmoJWAlN6kUi+F2L8HXEArzE8x7vwdsslrwMKUe4dFS+ZC/7
-5iDOaxcZ7TYkCgwzBt341++DCgP6j3fY1QJBALB6AcOcwi52m6l4B8mu3ZkEPjdX
-BHTuONTqhv/TqoaLlxODL2NDvvDKqeMp7KBd/srt79swW2lQXS4+fvrlTdkCQQCm
-zxj4O1QWkthkfje6ubSkTwUIOatUzrp1F9GNH2dJRtX2dx9FCwxGCC7WY6XzRXqa
-GF0wsedSllbGD+82nWQlAkAicMGqCqRq4hKR/cVmFatOqKVWCVkx6OFF2FhuiI5Z
-h5eIOPGCt8dVRs1P9DNSld/D98Sfm65m85z8BtXovvYV
------END RSA PRIVATE KEY-----
------BEGIN CERTIFICATE-----
-MIIChzCCAfCgAwIBAgIGANUxXM9BMA0GCSqGSIb3DQEBBQUAMHoxDjAMBgNVBAMT
-BW90cENBMSAwHgYJKoZIhvcNAQkBFhF0ZXN0ZXJAZXJsYW5nLm9yZzESMBAGA1UE
-BxMJU3RvY2tob2xtMQswCQYDVQQGEwJTRTEPMA0GA1UEChMGZXJsYW5nMRQwEgYD
-VQQLEwt0ZXN0aW5nIGRlcDAiGA8yMDEwMDkwMTAwMDAwMFoYDzIwMjUwODI4MDAw
-MDAwWjB7MQ8wDQYDVQQDEwZzZXJ2ZXIxIDAeBgkqhkiG9w0BCQEWEXRlc3RlckBl
-cmxhbmcub3JnMRIwEAYDVQQHEwlTdG9ja2hvbG0xCzAJBgNVBAYTAlNFMQ8wDQYD
-VQQKEwZlcmxhbmcxFDASBgNVBAsTC3Rlc3RpbmcgZGVwMIGfMA0GCSqGSIb3DQEB
-AQUAA4GNADCBiQKBgQCf4Htxr99lLs5W8QQw7jdakqyAkIjOW4aqH8sr4va4SvZ9
-Adq67k8jMHefCVZo+F8x4cwsBgB4aWzFIGBnvFTi6YsH27XW7f9O9IPCej8fdhRZ
-4UAtNHa253buOWpDGla2JmIdkmfFvXFJycMIKbG5tYilVXoWKBMKmCwWaXz0nQID
-AQABoxMwETAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBBQUAA4GBAGF5Pfwk
-QDdwJup/mVITPxbBls4Yl7anDooUQsq8066lA1g54H/PRfXscGkyCFGh1ifXvf1L
-psMRoBAdDHL/wSJplk3rRavkC94eBgnTFZmfKL6844g1j53yameiYL8IEVExYMBg
-/XGyc0qwq57WT8B/K4aElrvlBlQ0wF3wN54M
------END CERTIFICATE-----
diff --git a/lib/inets/test/uri_SUITE.erl b/lib/inets/test/uri_SUITE.erl
index f973296af6..8e00e6f565 100644
--- a/lib/inets/test/uri_SUITE.erl
+++ b/lib/inets/test/uri_SUITE.erl
@@ -52,6 +52,7 @@ all() ->
      escaped,
      hexed_query,
      scheme_validation,
+     scheme_validation_bin,
      encode_decode
     ].
 
@@ -273,6 +274,26 @@ scheme_validation(Config) when is_list(Config) ->
 	http_uri:parse("https://localhost#fragment",
 		       [{scheme_validation_fun, none}]).
 
+scheme_validation_bin(Config) when is_list(Config) ->
+    {ok, {http,<<>>,<<"localhost">>,80,<<"/">>,<<>>}} =
+        http_uri:parse(<<"http://localhost#fragment">>),
+
+    ValidationFun =
+        fun(<<"http">>) -> valid;
+           (_) -> {error, bad_scheme}
+        end,
+
+    {ok, {http,<<>>,<<"localhost">>,80,<<"/">>,<<>>}} =
+        http_uri:parse(<<"http://localhost#fragment">>,
+                       [{scheme_validation_fun, ValidationFun}]),
+    {error, bad_scheme} =
+        http_uri:parse(<<"https://localhost#fragment">>,
+                       [{scheme_validation_fun, ValidationFun}]),
+    %% non-fun scheme_validation_fun works as no option passed
+    {ok, {https,<<>>,<<"localhost">>,443,<<"/">>,<<>>}} =
+        http_uri:parse(<<"https://localhost#fragment">>,
+                       [{scheme_validation_fun, none}]).
+
 encode_decode(Config) when is_list(Config) ->
     ?assertEqual("foo%20bar", http_uri:encode("foo bar")),
     ?assertEqual(<<"foo%20bar">>, http_uri:encode(<<"foo bar">>)),
diff --git a/lib/inets/vsn.mk b/lib/inets/vsn.mk
index 34b6902747..1fad9afe33 100644
--- a/lib/inets/vsn.mk
+++ b/lib/inets/vsn.mk
@@ -19,6 +19,6 @@
 # %CopyrightEnd%
 
 APPLICATION = inets
-INETS_VSN   = 6.4.2
+INETS_VSN   = 6.5
 PRE_VSN     =
 APP_VSN     = "$(APPLICATION)-$(INETS_VSN)$(PRE_VSN)"
diff --git a/lib/jinterface/doc/src/Makefile b/lib/jinterface/doc/src/Makefile
index 7eb0e20b4d..37de0a35c5 100644
--- a/lib/jinterface/doc/src/Makefile
+++ b/lib/jinterface/doc/src/Makefile
@@ -46,12 +46,11 @@ XML_PART_FILES = \
 	part.xml
 XML_CHAPTER_FILES = \
 	notes.xml \
-	notes_history.xml \
 	jinterface_users_guide.xml
 
 BOOK_FILES = book.xml
 
-XML_FILES = $(BOOK_FILES) $(XML_APPLICATION_FILES) $(XML_REF3_FILES) \
+XML_FILES = $(BOOK_FILES) $(XML_APP_FILES) $(XML_REF3_FILES) \
             $(XML_PART_FILES) $(XML_CHAPTER_FILES)
 
 GIF_FILES =
diff --git a/lib/jinterface/doc/src/notes.xml b/lib/jinterface/doc/src/notes.xml
index b44a04d7cd..346d467c2d 100644
--- a/lib/jinterface/doc/src/notes.xml
+++ b/lib/jinterface/doc/src/notes.xml
@@ -31,6 +31,21 @@
   </header>
   <p>This document describes the changes made to the Jinterface application.</p>
 
+<section><title>Jinterface 1.8.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Jinterface 1.8</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/jinterface/java_src/com/ericsson/otp/erlang/Makefile b/lib/jinterface/java_src/com/ericsson/otp/erlang/Makefile
index e55cfa62ea..001acfdd2e 100644
--- a/lib/jinterface/java_src/com/ericsson/otp/erlang/Makefile
+++ b/lib/jinterface/java_src/com/ericsson/otp/erlang/Makefile
@@ -130,7 +130,6 @@ release_spec: opt
 
 release_docs_spec:
 
-
-
+xmllint:
 
 # ----------------------------------------------------
diff --git a/lib/jinterface/java_src/pom.xml.src b/lib/jinterface/java_src/pom.xml.src
index 98232db78c..584bd81076 100644
--- a/lib/jinterface/java_src/pom.xml.src
+++ b/lib/jinterface/java_src/pom.xml.src
@@ -76,6 +76,17 @@
 			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-jar-plugin</artifactId>
+				<configuration>
+					<archive>
+						<manifestEntries>
+							<Automatic-Module-Name>com.ericsson.otp.erlang</Automatic-Module-Name>
+						</manifestEntries>
+					</archive>
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-javadoc-plugin</artifactId>
 				<version>2.10.3</version>
 				<executions>
diff --git a/lib/jinterface/test/nc_SUITE.erl b/lib/jinterface/test/nc_SUITE.erl
index 81944f71d4..daa17195ee 100644
--- a/lib/jinterface/test/nc_SUITE.erl
+++ b/lib/jinterface/test/nc_SUITE.erl
@@ -651,11 +651,10 @@ do_echo(DataList, Config, OutTrans, InTrans, ExtraArgs)
 echo_loop([D|Ds], Echoer, OutTrans, InTrans, TermAcc) ->
     OutMsg = OutTrans(D),
     Echoer ! OutMsg,
-    io:format("echo_server ~p: ~p ! ~P~n", [self(),Echoer,OutMsg,10]),
+    %%io:format("echo_server ~p: ~p ! ~P~n", [self(),Echoer,OutMsg,10]),
     receive
 	Reply ->
-	    io:format("echo_server ~p: receive ~P~n",
-		      [self(),Reply,10]),
+	    %%io:format("echo_server ~p: receive ~P~n", [self(),Reply,10]),
 	    InTrans(Echoer, D, Reply)
     end,
     Term = case OutMsg of
@@ -670,11 +669,10 @@ echo_loop(Cont, Echoer, OutTrans, InTrans, TermAcc)
   when is_function(Cont, 0) ->
     check_terms(Echoer, TermAcc),
     OutMsg = Echoer ! {self(),undefined,hash_clear},
-    io:format("echo_server ~p: ~p ! ~P~n", [self(),Echoer,OutMsg,10]),
+    %%io:format("echo_server ~p: ~p ! ~P~n", [self(),Echoer,OutMsg,10]),
     receive
 	{Echoer,hash_cleared,hash_clear}=Reply ->
-	    io:format("echo_server ~p: receive ~P~n",
-		      [self(),Reply,10]),
+	    %%io:format("echo_server ~p: receive ~P~n", [self(),Reply,10]),
 	    ok;
 	Other ->
 	    io:format("echo_server_terms unexpected ~p: receive ~P~n",
@@ -686,11 +684,10 @@ echo_loop(Cont, Echoer, OutTrans, InTrans, TermAcc)
 check_terms(Echoer, [Term | Rest]) ->
     OutMsg = {self(),Term,hash_lookup},
     Echoer ! OutMsg,
-    io:format("check_terms ~p: ~p ! ~P~n", [self(),Echoer,OutMsg,10]),
+    %%io:format("check_terms ~p: ~p ! ~P~n", [self(),Echoer,OutMsg,10]),
     receive
 	{Echoer,true,hash_lookup} = ReplyMsg ->
-	    io:format("check_terms ~p: receive ~P~n",
-		      [self(),ReplyMsg,10]),
+	    %%io:format("check_terms ~p: receive ~P~n", [self(),ReplyMsg,10]),
 	    check_terms(Echoer, Rest);
 	Other ->
 	    io:format("check_terms unexpected ~p: receive ~P~n",
diff --git a/lib/jinterface/vsn.mk b/lib/jinterface/vsn.mk
index 373e2dab22..0a8a1190ec 100644
--- a/lib/jinterface/vsn.mk
+++ b/lib/jinterface/vsn.mk
@@ -1 +1 @@
-JINTERFACE_VSN = 1.8
+JINTERFACE_VSN = 1.8.1
diff --git a/lib/kernel/doc/src/Makefile b/lib/kernel/doc/src/Makefile
index c9d23ac4c4..0759f362d4 100644
--- a/lib/kernel/doc/src/Makefile
+++ b/lib/kernel/doc/src/Makefile
@@ -71,7 +71,7 @@ XML_REF4_FILES = app.xml config.xml
 XML_REF6_FILES = kernel_app.xml
 
 XML_PART_FILES =
-XML_CHAPTER_FILES = notes.xml notes_history.xml
+XML_CHAPTER_FILES = notes.xml
 
 BOOK_FILES = book.xml
 
diff --git a/lib/kernel/doc/src/code.xml b/lib/kernel/doc/src/code.xml
index c94f612c01..bd95819636 100644
--- a/lib/kernel/doc/src/code.xml
+++ b/lib/kernel/doc/src/code.xml
@@ -34,26 +34,28 @@
     <p>This module contains the interface to the Erlang
       <em>code server</em>, which deals with the loading of compiled
       code into a running Erlang runtime system.</p>
-    <p>The runtime system can be started in <em>embedded</em> or
-      <em>interactive</em> mode. Which one is decided by command-line
+    <p>The runtime system can be started in <em>interactive</em> or
+      <em>embedded</em> mode. Which one is decided by the command-line
       flag <c>-mode</c>:</p>
     <pre>
 % <input>erl -mode interactive</input></pre>
     <p>The modes are as follows:</p>
     <list type="bulleted">
       <item>
-        <p>In embedded mode, all code is loaded during system startup
-          according to the boot script. (Code can also be loaded later
-          by explicitly ordering the code server to do so).</p>
-      </item>
-      <item>
         <p>In interactive mode, which is default, only some code is loaded
-	  during system startup, basically the modules needed by the runtime
+          during system startup, basically the modules needed by the runtime
           system. Other code is dynamically loaded when first
           referenced. When a call to a function in a certain module is
           made, and the module is not loaded, the code server searches
           for and tries to load the module.</p>
       </item>
+      <item>
+        <p>In embedded mode, modules are not auto loaded. Trying to use
+        a module that has not been loaded results in an error. This mode is
+        recommended when the boot script loads all modules, as it is
+        typically done in OTP releases. (Code can still be loaded later
+        by explicitly ordering the code server to do so).</p>
+      </item>
     </list>
     <p>To prevent accidentally reloading of modules affecting the Erlang
       runtime system, directories <c>kernel</c>, <c>stdlib</c>,
diff --git a/lib/kernel/doc/src/file.xml b/lib/kernel/doc/src/file.xml
index 2ab35b9b05..1b72769ce3 100644
--- a/lib/kernel/doc/src/file.xml
+++ b/lib/kernel/doc/src/file.xml
@@ -33,11 +33,14 @@
   <description>
     <p>This module provides an interface to the file system.</p>
 
-    <p>On operating systems with thread support,
-      file operations can be performed in threads of their own, allowing
-      other Erlang processes to continue executing in parallel with
-      the file operations. See command-line flag
-      <c>+A</c> in <seealso marker="erts:erl"><c>erl(1)</c></seealso>.</p>
+    <warning>
+       <p>File operations are only guaranteed to appear atomic when going
+          through the same file server. A NIF or other OS process may observe
+          intermediate steps on certain operations on some operating systems,
+          eg. renaming an existing file on Windows, or
+          <seealso marker="#write_file_info/2"><c>write_file_info/2</c>
+          </seealso> on any OS at the time of writing.</p>
+    </warning>
 
     <p>Regarding filename encoding, the Erlang VM can operate in
     two modes. The current mode can be queried using function
@@ -90,13 +93,6 @@
       are now <em>rejected</em> and will cause primitive
       file operations fail.
     </p></note>
-    <warning><p>
-      Currently null characters at the end of the filename
-      will be accepted by primitive file operations. Such
-      filenames are however still documented as invalid. The
-      implementation will also change in the future and
-      reject such filenames.
-    </p></warning>
 
   </description>
 
@@ -985,8 +981,7 @@ f.txt:  {person, "kalle", 25}.
           </item>
           <tag><c>eisdir</c></tag>
           <item>
-            <p>The named file is not a regular file. It can be a
-              directory, a FIFO, or a device.</p>
+            <p>The named file is a directory.</p>
           </item>
           <tag><c>enotdir</c></tag>
           <item>
@@ -1438,8 +1433,12 @@ f.txt:  {person, "kalle", 25}.
 	    which is 1970-01-01 00:00 UTC.</p></item>
 	  </taglist>
 	<p>Default is <c>{time, local}</c>.</p>
-        <p>If the option <c>raw</c> is set, the file server is not called
-          and only information about local files is returned.</p>
+        <p>If the option <c>raw</c> is set, the file server is not called and
+           only information about local files is returned. Note that this will
+           break this module's atomicity guarantees as it can race with a
+           concurrent call to
+           <seealso marker="#write_file_info/2"><c>write_file_info/1,2</c>
+           </seealso></p>
 	  <note>
           <p>As file times are stored in POSIX time on most OS, it is faster to
 	  query file information with option <c>posix</c>.</p>
@@ -1687,8 +1686,12 @@ f.txt:  {person, "kalle", 25}.
 	except that if <c><anno>Name</anno></c> is a symbolic link, information
 	about the link is returned in the <c>file_info</c> record and
           the <c>type</c> field of the record is set to <c>symlink</c>.</p>
-      <p>If the option <c>raw</c> is set, the file server is not called
-        and only information about local files is returned.</p>
+        <p>If the option <c>raw</c> is set, the file server is not called and
+           only information about local files is returned. Note that this will
+           break this module's atomicity guarantees as it can race with a
+           concurrent call to
+           <seealso marker="#write_file_info/2"><c>write_file_info/1,2</c>
+           </seealso></p>
         <p>If <c><anno>Name</anno></c> is not a symbolic link, this function returns
           the same result as <c>read_file_info/1</c>.
           On platforms that do not support symbolic links, this function
@@ -1826,24 +1829,16 @@ f.txt:  {person, "kalle", 25}.
 	<p>The file used must be opened using the <c>raw</c> flag, and the process
 	calling <c>sendfile</c> must be the controlling process of the socket.
 	See <seealso marker="gen_tcp#controlling_process-2"><c>gen_tcp:controlling_process/2</c></seealso>.</p>
-	<p>If the OS used does not support <c>sendfile</c>, an Erlang fallback
-	using
-	<seealso marker="#read/2"><c>read/2</c></seealso> and
-	<seealso marker="gen_tcp#send/2"><c>gen_tcp:send/2</c></seealso> is used.</p>
+	<p>If the OS used does not support non-blocking <c>sendfile</c>, an
+	Erlang fallback using <seealso marker="#read/2"><c>read/2</c></seealso>
+	and <seealso marker="gen_tcp#send/2"><c>gen_tcp:send/2</c></seealso> is
+        used.</p>
 	<p>The option list can contain the following options:</p>
 	<taglist>
           <tag><c>chunk_size</c></tag>
           <item><p>The chunk size used by the Erlang fallback to send
 	  data. If using the fallback, set this to a value
 	  that comfortably fits in the systems memory. Default is 20 MB.</p></item>
-	  <tag><c>use_threads</c></tag>
-          <item><p>Instructs the emulator to use the <c>async</c> thread pool for the
-	  <c>sendfile</c> system call. This can be useful if the OS you are running
-	  on does not properly support non-blocking <c>sendfile</c> calls. Notice that
-	  using <c>async</c> threads potentially makes your system vulnerable to slow
-	  client attacks. If set to <c>true</c> and no <c>async</c> threads are available,
-	  the <c>sendfile</c> call returns <c>{error,einval}</c>.
-	  Introduced in Erlang/OTP 17.0. Default is <c>false</c>.</p></item>
 	</taglist>
       </desc>
     </func>
@@ -2148,144 +2143,77 @@ f.txt:  {person, "kalle", 25}.
 
   <section>
     <title>Performance</title>
-    <p>Some operating system file operations, for example, a
-      <c>sync/1</c> or <c>close/1</c> on a huge file, can block their
-      calling thread for seconds. If this affects the emulator main
-      thread, the response time is no longer in the order of
-      milliseconds, depending on the definition of "soft" in soft
-      real-time system.</p>
-    <p>If the device driver thread pool is active, file operations are
-      done through those threads instead, so the emulator can go on
-      executing Erlang processes. Unfortunately, the time for serving a
-      file operation increases because of the extra scheduling required
-      from the operating system.</p>
-    <p>If the device driver thread pool is disabled or of size 0, large
-      file reads and writes are segmented into many smaller, which
-      enable the emulator to serve other processes during the file
-      operation. This has the same effect as when using the thread
-      pool, but with larger overhead. Other file operations, for
-      example, <c>sync/1</c> or <c>close/1</c> on a huge file, still are
-      a problem.</p>
-    <p>For increased performance, raw files are recommended. Raw files
-      use the file system of the host machine of the node.</p>
+    <p>For increased performance, raw files are recommended.</p>
+    <p>A normal file is really a process so it can be used as an I/O
+       device (see <seealso marker="stdlib:io"><c>io</c></seealso>).
+       Therefore, when data is written to a normal file, the sending of the
+       data to the file process, copies all data that are not binaries. Opening
+       the file in binary mode and writing binaries is therefore recommended.
+       If the file is opened on another node, or if the file server runs as
+       slave to the file server of another node, also binaries are copied.</p>
     <note>
-      <p>
-	For normal files (non-raw), the file server is used to find the files,
-	and if the node is running its file server as slave to the file server
-	of another node, and the other node runs on some other host machine,
-	they can have different file systems.
-        However, this is seldom a problem.</p>
+      <p>Raw files use the file system of the host machine of the node.
+         For normal files (non-raw), the file server is used to find the files,
+         and if the node is running its file server as slave to the file server
+         of another node, and the other node runs on some other host machine,
+         they can have different file systems.
+         However, this is seldom a problem.</p>
     </note>
-    <p>A normal file is really a process so it can be used as an I/O
-      device (see
-      <seealso marker="stdlib:io"><c>io</c></seealso>).
-      Therefore, when data is written to a
-      normal file, the sending of the data to the file process, copies 
-      all data that are not binaries. Opening the file in binary mode
-      and writing binaries is therefore recommended. If the file is
-      opened on another node, or if the file server runs as slave to
-      the file server of another node, also binaries are copied.</p>
-    <p>Caching data to reduce the number of file operations, or rather
-      the number of calls to the file driver, generally increases
-      performance. The following function writes 4 MBytes in 23
-      seconds when tested:</p>
+    <p><seealso marker="#open/2"><c>open/2</c></seealso> can be given the
+       options <c>delayed_write</c> and <c>read_ahead</c> to turn on caching,
+       which will reduce the number of operating system calls and greatly
+       improve performance for small reads and writes. However, the overhead
+       won't disappear completely and it's best to keep the number of file
+       operations to a minimum. As a contrived example, the following function
+       writes 4MB in 2.5 seconds when tested:</p>
+
     <code type="none"><![CDATA[
-create_file_slow(Name, N) when integer(N), N >= 0 ->
-    {ok, FD} = file:open(Name, [raw, write, delayed_write, binary]),
-    ok = create_file_slow(FD, 0, N),
-    ok = ?FILE_MODULE:close(FD),
-    ok.
-      
-create_file_slow(FD, M, M) ->
+create_file_slow(Name) ->
+    {ok, Fd} = file:open(Name, [raw, write, delayed_write, binary]),
+    create_file_slow_1(Fd, 4 bsl 20),
+    file:close(Fd).
+
+create_file_slow_1(_Fd, 0) ->
     ok;
-create_file_slow(FD, M, N) ->
-    ok = file:write(FD, <<M:32/unsigned>>),
-    create_file_slow(FD, M+1, N).]]></code>
+create_file_slow_1(Fd, M) ->
+    ok = file:write(Fd, <<0>>),
+    create_file_slow_1(Fd, M - 1).]]></code>
+
+    <p>The following functionally equivalent code writes 128 bytes per call
+       to <seealso marker="#write/2"><c>write/2</c></seealso> and so does the
+       same work in 0.08 seconds, which is roughly 30 times faster:</p>
 
-    <p>The following, functionally equivalent, function collects 1024
-      entries into a list of 128 32-byte binaries before each call to
-      <seealso marker="#write/2"><c>write/2</c></seealso> and so
-      does the same work in 0.52 seconds,
-      which is 44 times faster:</p>
     <code type="none"><![CDATA[
-create_file(Name, N) when integer(N), N >= 0 ->
-    {ok, FD} = file:open(Name, [raw, write, delayed_write, binary]),
-    ok = create_file(FD, 0, N),
-    ok = ?FILE_MODULE:close(FD),
+create_file(Name) ->
+    {ok, Fd} = file:open(Name, [raw, write, delayed_write, binary]),
+    create_file_1(Fd, 4 bsl 20),
+    file:close(Fd),
     ok.
-      
-create_file(FD, M, M) ->
+
+create_file_1(_Fd, 0) ->
     ok;
-create_file(FD, M, N) when M + 1024 =&lt; N ->
-    create_file(FD, M, M + 1024, []),
-    create_file(FD, M + 1024, N);
-create_file(FD, M, N) ->
-    create_file(FD, M, N, []).
-      
-create_file(FD, M, M, R) ->
-    ok = file:write(FD, R);
-create_file(FD, M, N0, R) when M + 8 =&lt; N0 ->
-    N1  = N0-1,  N2  = N0-2,  N3  = N0-3,  N4  = N0-4, 
-    N5  = N0-5,  N6  = N0-6,  N7  = N0-7,  N8  = N0-8, 
-    create_file(FD, M, N8, 
-                [<<N8:32/unsigned,  N7:32/unsigned, 
-                   N6:32/unsigned,  N5:32/unsigned, 
-                   N4:32/unsigned,  N3:32/unsigned, 
-                   N2:32/unsigned,  N1:32/unsigned>> | R]);
-create_file(FD, M, N0, R) ->
-    N1 = N0-1,
-    create_file(FD, M, N1, [<<N1:32/unsigned>> | R]).]]></code>
+create_file_1(Fd, M) when M >= 128 ->
+    ok = file:write(Fd, <<0:(128)/unit:8>>),
+    create_file_1(Fd, M - 128);
+create_file_1(Fd, M) ->
+    ok = file:write(Fd, <<0:(M)/unit:8>>),
+    create_file_1(Fd, M - 1).]]></code>
 
-    <note>
-      <p>Trust only your own benchmarks. If the list length in 
-        <c>create_file/2</c> above is increased, it runs slightly
-        faster, but consumes more memory and causes more memory
-        fragmentation. How much this affects your application is
-        something that this simple benchmark cannot predict.</p>
-      <p>If the size of each binary is increased to 64 bytes, it
-        also runs slightly faster, but the code is then twice as clumsy.
-        In the current implementation, binaries larger than 64 bytes are
-        stored in memory common to all processes and not copied when
-        sent between processes, while these smaller binaries are stored
-        on the process heap and copied when sent like any other term.</p>
-      <p>So, with a binary size of 68 bytes, <c>create_file/2</c> runs
-        30 percent slower than with 64 bytes, and causes much more
-        memory fragmentation. Notice that if the binaries were to be sent
-        between processes (for example, a non-raw file), the results
-        would probably be completely different.</p>
-    </note>
-    <p>A raw file is really a port. When writing data to a port, it is
-      efficient to write a list of binaries. It is not needed to
-      flatten a deep list before writing. On Unix hosts, scatter output,
-      which writes a set of buffers in one operation, is used when
-      possible. In this way <c>write(FD, [Bin1, Bin2 | Bin3])</c>
-      writes the contents of the binaries without copying the data
-      at all, except for perhaps deep down in the operating system
-      kernel.</p>
-    <p>For raw files, <c>pwrite/2</c> and <c>pread/2</c> are
-      efficiently implemented. The file driver is called only once for
-      the whole operation, and the list iteration is done in the file
-      driver.</p>
-    <p>The options <c>delayed_write</c> and <c>read_ahead</c> to 
-      <seealso marker="#open/2"><c>open/2</c></seealso>
-      make the file driver cache data to reduce
-      the number of operating system calls. The function
-      <c>create_file/2</c> in the recent example takes 60 seconds
-      without option <c>delayed_write</c>, which is 2.6
-      times slower.</p>
-    <p>As a bad example, <c>create_file_slow/2</c>
-      without options <c>raw</c>, <c>binary</c>, and <c>delayed_write</c>,
-      meaning it calls <c>open(Name, [write])</c>, needs
-      1 min 20 seconds for the job, which is 3.5 times slower than
-      the first example, and 150 times slower than the optimized
-      <c>create_file/2</c>.</p>
-      <warning>
-	<p>If an error occurs when accessing an open file with module
-      <seealso marker="stdlib:io"><c>io</c></seealso>,
-      the process handling the file exits. The dead
-      file process can hang if a process tries to access it later.
-      This will be fixed in a future release.</p>
-      </warning>
+    <p>When writing data it's generally more efficient to write a list of
+       binaries rather than a list of integers. It is not needed to
+       flatten a deep list before writing. On Unix hosts, scatter output,
+       which writes a set of buffers in one operation, is used when
+       possible. In this way <c>write(FD, [Bin1, Bin2 | Bin3])</c>
+       writes the contents of the binaries without copying the data
+       at all, except for perhaps deep down in the operating system
+       kernel.</p>
+    <warning>
+        <p>If an error occurs when accessing an open file with module
+           <seealso marker="stdlib:io"><c>io</c></seealso>, the process
+           handling the file exits. The dead file process can hang if a process
+           tries to access it later. This will be fixed in a future release.
+           </p>
+    </warning>
   </section>
 
   <section>
diff --git a/lib/kernel/doc/src/gen_tcp.xml b/lib/kernel/doc/src/gen_tcp.xml
index 070782e1f3..e6104b0c76 100644
--- a/lib/kernel/doc/src/gen_tcp.xml
+++ b/lib/kernel/doc/src/gen_tcp.xml
@@ -51,6 +51,7 @@ server() ->
     {ok, Sock} = gen_tcp:accept(LSock),
     {ok, Bin} = do_recv(Sock, []),
     ok = gen_tcp:close(Sock),
+    ok = gen_tcp:close(LSock),
     Bin.
 
 do_recv(Sock, Bs) ->
@@ -309,9 +310,9 @@ do_recv(Sock, Bs) ->
             <seealso marker="inet#setopts/2"><c>inet:setopts/2</c></seealso>.
             </p></item>
         </taglist>
-        <p>The returned socket <c><anno>ListenSocket</anno></c> can only be
-          used in calls to
-          <seealso marker="#accept/1"><c>accept/1,2</c></seealso>.</p>
+        <p>The returned socket <c><anno>ListenSocket</anno></c> should be used
+          in calls to <seealso marker="#accept/1"><c>accept/1,2</c></seealso> to
+          accept incoming connection requests.</p>
         <note>
           <p>The default values for options specified to <c>listen</c> can
             be affected by the Kernel configuration parameter
diff --git a/lib/kernel/doc/src/inet.xml b/lib/kernel/doc/src/inet.xml
index 169a76463b..9552332948 100644
--- a/lib/kernel/doc/src/inet.xml
+++ b/lib/kernel/doc/src/inet.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>1997</year><year>2017</year>
+      <year>1997</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -197,6 +197,9 @@ fe80::204:acff:fe17:bf38
     <datatype>
       <name name="address_family"/>
     </datatype>
+    <datatype>
+      <name name="socket_protocol"/>
+    </datatype>
   </datatypes>
 
   <funcs>
@@ -274,9 +277,7 @@ fe80::204:acff:fe17:bf38
         <p>Returns a <c>hostent</c> record for the host with the specified
           hostname.</p>
         <p>If resolver option <c>inet6</c> is <c>true</c>,
-          an IPv6 address is looked up. If that fails,
-          the IPv4 address is looked up and returned on
-          IPv6-mapped IPv4 format.</p>
+          an IPv6 address is looked up.</p>
       </desc>
     </func>
 
@@ -461,6 +462,61 @@ get_tcpi_sacked(Sock) ->
     </func>
 
     <func>
+      <name name="i" arity="0" />
+      <name name="i" arity="1" />
+      <name name="i" arity="2" />
+      <fsummary>Displays information and statistics about sockets on the terminal</fsummary>
+      <desc>
+        <p>
+          Lists all TCP, UDP and SCTP sockets, including those that the Erlang runtime system uses as well as
+          those created by the application.
+        </p>
+        <p>
+          The following options are available:
+        </p>
+
+        <taglist>
+          <tag><c>port</c></tag>
+          <item>
+            <p>The internal index of the port.</p>
+          </item>
+          <tag><c>module</c></tag>
+          <item>
+            <p>The callback module of the socket.</p>
+          </item>
+          <tag><c>recv</c></tag>
+          <item>
+            <p>Number of bytes received by the socket.</p>
+          </item>
+          <tag><c>sent</c></tag>
+          <item>
+            <p>Number of bytes sent from the socket.</p>
+          </item>
+          <tag><c>owner</c></tag>
+          <item>
+            <p>The socket owner process.</p>
+          </item>
+          <tag><c>local_address</c></tag>
+          <item>
+            <p>The local address of the socket.</p>
+          </item>
+          <tag><c>foreign_address</c></tag>
+          <item>
+            <p>The address and port of the other end of the connection.</p>
+          </item>
+          <tag><c>state</c></tag>
+          <item>
+            <p>The connection state.</p>
+          </item>
+          <tag><c>type</c></tag>
+          <item>
+            <p>STREAM or DGRAM or SEQPACKET.</p>
+          </item>
+        </taglist>
+      </desc>
+    </func>
+
+    <func>
       <name name="ntoa" arity="1" />
       <fsummary>Convert IPv6/IPV4 address to ASCII.</fsummary>
       <desc>
@@ -524,6 +580,19 @@ get_tcpi_sacked(Sock) ->
     </func>
 
     <func>
+      <name name="ipv4_mapped_ipv6_address" arity="1" />
+      <fsummary>Convert to and from IPv4-mapped IPv6 address.</fsummary>
+      <desc>
+	<p>
+	  Convert an IPv4 address to an IPv4-mapped IPv6 address
+	  or the reverse.  When converting from an IPv6 address
+	  all but the 2 low words are ignored so this function also
+	  works on some other types of addresses than IPv4-mapped.
+	</p>
+      </desc>
+    </func>
+
+    <func>
       <name name="parse_strict_address" arity="1" />
       <fsummary>Parse an IPv4 or IPv6 address strict.</fsummary>
       <desc>
@@ -1214,7 +1283,7 @@ inet:setopts(Sock,[{raw,6,8,<<30:32/native>>}]),]]></code>
 	  For one-to-many style sockets, the special value <c>0</c>
 	  is defined to mean that the returned addresses must be
 	  without any particular association.
-	  How different SCTP implementations interprets this varies somewhat.
+	  How different SCTP implementations interpret this varies somewhat.
         </p>
       </desc>
     </func>
diff --git a/lib/kernel/doc/src/inet_res.xml b/lib/kernel/doc/src/inet_res.xml
index 3454e3c6f9..351d86a93a 100644
--- a/lib/kernel/doc/src/inet_res.xml
+++ b/lib/kernel/doc/src/inet_res.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>2009</year><year>2015</year>
+      <year>2009</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -230,9 +230,7 @@ inet_dns:record_type(_) -> undefined.</pre>
           <seealso marker="#getbyname/2"><c>getbyname/2,3</c></seealso>.
         </p>
         <p>If resolver option <c>inet6</c> is <c>true</c>,
-          an IPv6 address is looked up. If that fails,
-          the IPv4 address is looked up and returned on
-          IPv6-mapped IPv4 format.</p>
+          an IPv6 address is looked up.</p>
       </desc>
     </func>
 
diff --git a/lib/kernel/doc/src/kernel_app.xml b/lib/kernel/doc/src/kernel_app.xml
index e5ac031539..0762cebc94 100644
--- a/lib/kernel/doc/src/kernel_app.xml
+++ b/lib/kernel/doc/src/kernel_app.xml
@@ -4,7 +4,7 @@
 <appref>
   <header>
     <copyright>
-      <year>1996</year><year>2017</year>
+      <year>1996</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -469,8 +469,12 @@ MaxT = TickTime + TickTime / 4</code>
           <item><c>ObjSuffix = string()</c></item>
           <item><c>SrcSuffix = string()</c></item>
         </list>
-        <p>Specifies a list of rules for use by <c>filelib:find_file/2</c> and
-          <c>filelib:find_source/2</c>. If this is set to some other value
+        <p>Specifies a list of rules for use by
+	  <seealso marker="stdlib:filelib#find_file/2">
+	  <c>filelib:find_file/2</c></seealso>
+	  <seealso marker="stdlib:filelib#find_source/2">
+	  <c>filelib:find_source/2</c></seealso>
+          If this is set to some other value
           than the empty list, it replaces the default rules. Rules can be
           simple pairs of directory suffixes, such as <c>{"ebin",
           "src"}</c>, which are used by <c>filelib:find_file/2</c>, or
@@ -478,6 +482,16 @@ MaxT = TickTime + TickTime / 4</code>
           file name extensions, for example <c>[{".beam", ".erl", [{"ebin",
           "src"}]}</c>, which are used by <c>filelib:find_source/2</c>. Both
           kinds of rules can be mixed in the list.</p>
+	  <p>The interpretation of <c>ObjDirSuffix</c> and <c>SrcDirSuffix</c>
+	  is as follows: if the end of the directory name where an
+	  object is located matches <c>ObjDirSuffix</c>, then the
+	  name created by replacing <c>ObjDirSuffix</c> with
+	  <c>SrcDirSuffix</c> is expanded by calling
+	  <seealso marker="stdlib:filelib#wildcard/1">
+	  <c>filelib:wildcard/1</c></seealso>, and the first regular
+	  file found among the matches is the source file.
+	</p>
+
       </item>
     </taglist>
   </section>
diff --git a/lib/kernel/doc/src/net_kernel.xml b/lib/kernel/doc/src/net_kernel.xml
index 0b94fc0fa6..a30d28d55a 100644
--- a/lib/kernel/doc/src/net_kernel.xml
+++ b/lib/kernel/doc/src/net_kernel.xml
@@ -56,7 +56,7 @@ $ <input>erl -sname foobar</input></pre>
     <p>Normally, connections are established automatically when
       another node is referenced. This functionality can be disabled
       by setting Kernel configuration parameter
-      <c>dist_auto_connect</c> to <c>false</c>, see
+      <c>dist_auto_connect</c> to <c>never</c>, see
       <seealso marker="kernel_app"><c>kernel(6)</c></seealso>. In this case,
       connections must be established explicitly by calling
       <seealso marker="#connect_node/1"><c>connect_node/1</c></seealso>.</p>
@@ -230,7 +230,12 @@ $ <input>erl -sname foobar</input></pre>
           <item>
             <p>The tuple <c>{nodedown_reason, Reason}</c> is included in
               <c>InfoList</c> in <c>nodedown</c> messages.</p>
-            <p><c>Reason</c> can be any of the following:</p>
+            <p>
+	      <c>Reason</c> can, depending on which
+	      distribution module or process that is used be any term,
+	      but for the standard TCP distribution module it is
+	      any of the following:
+	    </p>
             <taglist>
               <tag><c>connection_setup_failed</c></tag>
               <item><p>The connection setup failed (after <c>nodeup</c>
diff --git a/lib/kernel/doc/src/notes.xml b/lib/kernel/doc/src/notes.xml
index a5316dd476..09844f1502 100644
--- a/lib/kernel/doc/src/notes.xml
+++ b/lib/kernel/doc/src/notes.xml
@@ -31,6 +31,69 @@
   </header>
   <p>This document describes the changes made to the Kernel application.</p>
 
+<section><title>Kernel 5.4.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Correct a few contracts. </p>
+          <p>
+	    Own Id: OTP-14889</p>
+        </item>
+        <item>
+          <p>
+	    Reject loading modules with names containing directory
+	    separators ('/' or '\' on Windows).</p>
+          <p>
+	    Own Id: OTP-14933 Aux Id: ERL-564, PR-1716 </p>
+        </item>
+        <item>
+          <p>
+	    Fix bug in handling of os:cmd/2 option max_size on
+	    windows.</p>
+          <p>
+	    Own Id: OTP-14940</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Kernel 5.4.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Add <c>os:cmd/2</c> that takes an options map as the
+	    second argument.</p>
+          <p>
+	    Add <c>max_size</c> as an option to <c>os:cmd/2</c> that
+	    control the maximum size of the result that
+	    <c>os:cmd/2</c> will return.</p>
+          <p>
+	    Own Id: OTP-14823</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Kernel 5.4.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Refactored an internal API.</p>
+          <p>
+	    Own Id: OTP-14784</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Kernel 5.4</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/kernel/doc/src/os.xml b/lib/kernel/doc/src/os.xml
index 0a08e2c78a..ef416ed233 100644
--- a/lib/kernel/doc/src/os.xml
+++ b/lib/kernel/doc/src/os.xml
@@ -58,17 +58,6 @@
 	operations to fail.
       </p>
     </note>
-    <warning>
-      <p>
-	Currently null characters at the end of filenames,
-	environment variable names and values will be accepted
-	by the primitive operations. Such filenames, environment
-	variable names and values are however still documented as
-	invalid. The implementation will also change in the
-	future and reject such filenames, environment variable
-	names and values.
-      </p>
-    </warning>
   </description>
 
   <datatypes>
@@ -114,7 +103,7 @@
       </desc>
     </datatype>
     <datatype>
-      <name name="command_input"/>
+      <name name="os_command"/>
       <desc>
         <p>All characters needs to be valid characters on the
 	specific OS using
@@ -127,28 +116,36 @@
 	</p>
       </desc>
     </datatype>
+    <datatype>
+      <name name="os_command_opts"/>
+      <desc>
+        <p>Options for <seealso marker="#cmd/2"><c>os:cmd/2</c></seealso></p>
+        <taglist>
+          <tag><c>max_size</c></tag>
+          <item>
+            <p>The maximum size of the data returned by the <c>os:cmd</c> call.
+            See the <seealso marker="#cmd/2"><c>os:cmd/2</c></seealso>
+            documentation for more details.</p>
+          </item>
+        </taglist>
+      </desc>
+    </datatype>
   </datatypes>
- 
+
   <funcs>
     <func>
       <name name="cmd" arity="1"/>
+      <name name="cmd" arity="2"/>
       <fsummary>Execute a command in a shell of the target OS.</fsummary>
       <desc>
         <p>Executes <c><anno>Command</anno></c> in a command shell of the
-          target OS,
-          captures the standard output of the command, and returns this
-          result as a string. This function is a replacement of
-          the previous function <c>unix:cmd/1</c>; they are equivalent on a
-          Unix platform.</p>
+	  target OS, captures the standard output of the command,
+          and returns this result as a string.</p>
 	  <warning><p>Previous implementation used to allow all characters
 	  as long as they were integer values greater than or equal to zero.
 	  This sometimes lead to unwanted results since null characters
-	  (integer value zero) often are interpreted as string termination.
-	  Current implementation still accepts null characters at the end
-	  of <c><anno>Command</anno></c> even though the documentation
-	  states that no null characters are allowed. This will however
-	  be changed in the future so that no null characters at all will
-	  be accepted.</p></warning>
+	  (integer value zero) often are interpreted as string termination. The
+	  current implementation rejects these.</p></warning>
         <p><em>Examples:</em></p>
         <code type="none">
 LsOut = os:cmd("ls"), % on unix platform
@@ -157,6 +154,21 @@ DirOut = os:cmd("dir"), % on Win32 platform</code>
           called from another program (for example, <c>os:cmd/1</c>)
           can differ, compared with the standard output of the command
           when called directly from an OS command shell.</p>
+        <p><c>os:cmd/2</c> was added in kernel-5.5 (OTP-20.2.1). It makes it
+          possible to pass an options map as the second argument in order to
+          control the behaviour of <c>os:cmd</c>. The possible options are:
+        </p>
+        <taglist>
+          <tag><c>max_size</c></tag>
+          <item>
+            <p>The maximum size of the data returned by the <c>os:cmd</c> call.
+              This option is a safety feature that should be used when the command
+              executed can return a very large, possibly infinite, result.</p>
+            <code type="none">
+> os:cmd("cat /dev/zero", #{ max_size => 20 }).
+[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]</code>
+          </item>
+        </taglist>
       </desc>
     </func>
 
diff --git a/lib/kernel/doc/src/rpc.xml b/lib/kernel/doc/src/rpc.xml
index adec2d9520..fab616e630 100644
--- a/lib/kernel/doc/src/rpc.xml
+++ b/lib/kernel/doc/src/rpc.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>1996</year><year>2016</year>
+      <year>1996</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -217,7 +217,7 @@
         <list type="bulleted">
           <item>A list of the nodes that do not exist</item>
           <item>A list of the nodes where the server does not exist</item>
-          <item>A list of the nodes where the server terminatd before sending
+          <item>A list of the nodes where the server terminated before sending
           any reply.</item>
         </list>
       </desc>
@@ -268,8 +268,9 @@
           on the specified nodes and collects the answers. It returns
           <c>{<anno>ResL</anno>, <anno>BadNodes</anno>}</c>, where
           <c><anno>BadNodes</anno></c> is a list
-          of the nodes that terminated or timed out during computation,
-          and <c><anno>ResL</anno></c> is a list of the return values.
+          of the nodes that do not exist,
+          and <c><anno>ResL</anno></c> is a list of the return values,
+	  or <c>{badrpc, <anno>Reason</anno>}</c> for failing calls.
           <c><anno>Timeout</anno></c> is a time (integer) in milliseconds, or
           <c>infinity</c>.</p>
         <p>The following example is useful when new object code is to
@@ -347,7 +348,7 @@
 
     <func>
       <name name="pmap" arity="3"/>
-      <fsummary>Parallell evaluation of mapping a function over a
+      <fsummary>Parallel evaluation of mapping a function over a
         list.</fsummary>
       <desc>
         <p>Evaluates <c>apply(<anno>Module</anno>, <anno>Function</anno>,
diff --git a/lib/kernel/doc/src/seq_trace.xml b/lib/kernel/doc/src/seq_trace.xml
index 197851021f..69eb12a8a0 100644
--- a/lib/kernel/doc/src/seq_trace.xml
+++ b/lib/kernel/doc/src/seq_trace.xml
@@ -80,13 +80,18 @@ seq_trace:set_token(OldToken), % activate the trace token again
         <p>Sets the individual <c><anno>Component</anno></c> of the trace token to
           <c><anno>Val</anno></c>. Returns the previous value of the component.</p>
         <taglist>
-          <tag><c>set_token(label, <anno>Integer</anno>)</c></tag>
+          <tag><c>set_token(label, <anno>Label</anno>)</c></tag>
           <item>
-            <p>The <c>label</c> component is an integer which
+            <p>The <c>label</c> component is a term which
               identifies all events belonging to the same sequential
               trace. If several sequential traces can be active
               simultaneously, <c>label</c> is used to identify
               the separate traces. Default is 0.</p>
+            <warning>
+              <p>Labels were restricted to small signed integers (28 bits)
+                prior to OTP 21. The trace token will be silenty dropped if it
+                crosses over to a node that does not support the label.</p>
+            </warning>
           </item>
           <tag><c>set_token(serial, SerialValue)</c></tag>
           <item>
diff --git a/lib/kernel/include/dist.hrl b/lib/kernel/include/dist.hrl
index db4a5eaebc..6baaa35d72 100644
--- a/lib/kernel/include/dist.hrl
+++ b/lib/kernel/include/dist.hrl
@@ -41,32 +41,7 @@
 -define(DFLAG_MAP_TAG, 16#20000).
 -define(DFLAG_BIG_CREATION, 16#40000).
 -define(DFLAG_SEND_SENDER, 16#80000).
-
-%% DFLAGs that require strict ordering or:ed together...
--define(DFLAGS_STRICT_ORDER_DELIVERY,
-        ?DFLAG_DIST_HDR_ATOM_CACHE).
-
+-define(DFLAG_BIG_SEQTRACE_LABELS, 16#100000).
 
 %% Also update dflag2str() in ../src/dist_util.erl
 %% when adding flags...
-
--define(DFLAGS_ALL,
-        (?DFLAG_PUBLISHED
-             bor ?DFLAG_ATOM_CACHE
-             bor ?DFLAG_EXTENDED_REFERENCES
-             bor ?DFLAG_DIST_MONITOR
-             bor ?DFLAG_FUN_TAGS
-             bor ?DFLAG_DIST_MONITOR_NAME
-             bor ?DFLAG_HIDDEN_ATOM_CACHE
-             bor ?DFLAG_NEW_FUN_TAGS
-             bor ?DFLAG_EXTENDED_PIDS_PORTS
-             bor ?DFLAG_EXPORT_PTR_TAG
-             bor ?DFLAG_BIT_BINARIES
-             bor ?DFLAG_NEW_FLOATS
-             bor ?DFLAG_UNICODE_IO
-             bor ?DFLAG_DIST_HDR_ATOM_CACHE
-             bor ?DFLAG_SMALL_ATOM_TAGS
-             bor ?DFLAG_UTF8_ATOMS
-             bor ?DFLAG_MAP_TAG
-             bor ?DFLAG_BIG_CREATION
-             bor ?DFLAG_SEND_SENDER)).
diff --git a/lib/kernel/src/Makefile b/lib/kernel/src/Makefile
index 5946620f0f..0bc9f121a0 100644
--- a/lib/kernel/src/Makefile
+++ b/lib/kernel/src/Makefile
@@ -106,6 +106,7 @@ MODULES = \
 	inet_sctp \
 	kernel \
 	kernel_config \
+	kernel_refc \
 	local_udp \
 	local_tcp \
 	net \
@@ -120,6 +121,13 @@ MODULES = \
 	user \
 	user_drv \
 	user_sup \
+	raw_file_io \
+	raw_file_io_compressed \
+	raw_file_io_inflate \
+	raw_file_io_deflate \
+	raw_file_io_delayed \
+	raw_file_io_list \
+	raw_file_io_raw \
 	wrap_log_reader
 
 HRL_FILES= ../include/file.hrl ../include/inet.hrl ../include/inet_sctp.hrl \
@@ -226,7 +234,8 @@ $(EBIN)/disk_log_server.beam: disk_log.hrl
 $(EBIN)/dist_util.beam: ../include/dist_util.hrl ../include/dist.hrl
 $(EBIN)/erl_boot_server.beam: inet_boot.hrl
 $(EBIN)/erl_epmd.beam: inet_int.hrl erl_epmd.hrl
-$(EBIN)/file.beam: ../include/file.hrl
+$(EBIN)/file.beam: ../include/file.hrl file_int.hrl
+$(EBIN)/file_io_server.beam: ../include/file.hrl file_int.hrl
 $(EBIN)/gen_tcp.beam: inet_int.hrl
 $(EBIN)/gen_udp.beam: inet_int.hrl
 $(EBIN)/gen_sctp.beam: ../include/inet_sctp.hrl
@@ -254,3 +263,10 @@ $(EBIN)/net_kernel.beam: ../include/net_address.hrl
 $(EBIN)/os.beam: ../include/file.hrl
 $(EBIN)/ram_file.beam: ../include/file.hrl
 $(EBIN)/wrap_log_reader.beam: disk_log.hrl ../include/file.hrl
+$(EBIN)/raw_file_io.beam: ../include/file.hrl file_int.hrl
+$(EBIN)/raw_file_io_compressed.beam: ../include/file.hrl file_int.hrl
+$(EBIN)/raw_file_io_inflate.beam: ../include/file.hrl file_int.hrl
+$(EBIN)/raw_file_io_deflate.beam: ../include/file.hrl file_int.hrl
+$(EBIN)/raw_file_io_delayed.beam: ../include/file.hrl file_int.hrl
+$(EBIN)/raw_file_io_list.beam: ../include/file.hrl file_int.hrl
+$(EBIN)/raw_file_io_raw.beam: ../include/file.hrl file_int.hrl
diff --git a/lib/kernel/src/code.erl b/lib/kernel/src/code.erl
index 9969021a6c..f143a49d2f 100644
--- a/lib/kernel/src/code.erl
+++ b/lib/kernel/src/code.erl
@@ -149,8 +149,11 @@ load_file(Mod) when is_atom(Mod) ->
 -spec ensure_loaded(Module) -> {module, Module} | {error, What} when
       Module :: module(),
       What :: embedded | badfile | nofile | on_load_failure.
-ensure_loaded(Mod) when is_atom(Mod) -> 
-    call({ensure_loaded,Mod}).
+ensure_loaded(Mod) when is_atom(Mod) ->
+    case erlang:module_loaded(Mod) of
+        true -> {module, Mod};
+        false -> call({ensure_loaded,Mod})
+    end.
 
 %% XXX File as an atom is allowed only for backwards compatibility.
 -spec load_abs(Filename) -> load_ret() when
diff --git a/lib/kernel/src/code_server.erl b/lib/kernel/src/code_server.erl
index 418b0c50e1..f5a890cb95 100644
--- a/lib/kernel/src/code_server.erl
+++ b/lib/kernel/src/code_server.erl
@@ -340,8 +340,7 @@ handle_call(all_loaded, _From, S) ->
     {reply,all_loaded(Db),S};
 
 handle_call({get_object_code,Mod}, _From, St) when is_atom(Mod) ->
-    Path = St#state.path,
-    case mod_to_bin(Path, Mod) of
+    case get_object_code(St, Mod) of
 	{_,Bin,FName} -> {reply,{Mod,Bin,FName},St};
 	Error -> {reply,Error,St}
     end;
@@ -1182,19 +1181,28 @@ load_file(Mod, From, St0) ->
 	     end,
     handle_pending_on_load(Action, Mod, From, St0).
 
-load_file_1(Mod, From, #state{path=Path}=St) ->
-    case mod_to_bin(Path, Mod) of
+load_file_1(Mod, From, St) ->
+    case get_object_code(St, Mod) of
 	error ->
 	    {reply,{error,nofile},St};
 	{Mod,Binary,File} ->
 	    try_load_module_1(File, Mod, Binary, From, St)
     end.
 
-mod_to_bin([Dir|Tail], Mod) ->
-    File = filename:append(Dir, atom_to_list(Mod) ++ objfile_extension()),
+get_object_code(#state{path=Path}, Mod) when is_atom(Mod) ->
+    ModStr = atom_to_list(Mod),
+    case erl_prim_loader:is_basename(ModStr) of
+        true ->
+            mod_to_bin(Path, Mod, ModStr ++ objfile_extension());
+        false ->
+            error
+    end.
+
+mod_to_bin([Dir|Tail], Mod, ModFile) ->
+    File = filename:append(Dir, ModFile),
     case erl_prim_loader:get_file(File) of
 	error -> 
-	    mod_to_bin(Tail, Mod);
+	    mod_to_bin(Tail, Mod, ModFile);
 	{ok,Bin,_} ->
 	    case filename:pathtype(File) of
 		absolute ->
@@ -1203,10 +1211,9 @@ mod_to_bin([Dir|Tail], Mod) ->
 		    {Mod,Bin,absname(File)}
 	    end
     end;
-mod_to_bin([], Mod) ->
+mod_to_bin([], Mod, ModFile) ->
     %% At last, try also erl_prim_loader's own method
-    File = to_list(Mod) ++ objfile_extension(),
-    case erl_prim_loader:get_file(File) of
+    case erl_prim_loader:get_file(ModFile) of
 	error -> 
 	    error;     % No more alternatives !
 	{ok,Bin,FName} ->
diff --git a/lib/kernel/src/disk_log.erl b/lib/kernel/src/disk_log.erl
index 70cbf1c87c..99ea8dc384 100644
--- a/lib/kernel/src/disk_log.erl
+++ b/lib/kernel/src/disk_log.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -266,7 +266,7 @@ inc_wrap_file(Log) ->
       Size :: dlog_size(),
       Reason :: no_such_log | nonode | {read_only_mode, Log}
               | {blocked_log, Log}
-              | {new_size_too_small, CurrentSize :: pos_integer()}
+              | {new_size_too_small, Log, CurrentSize :: pos_integer()}
               | {badarg, size}
               | {file_error, file:filename(), file_error()}.
 change_size(Log, NewSize) -> 
diff --git a/lib/kernel/src/disk_log_1.erl b/lib/kernel/src/disk_log_1.erl
index 93856aa7b3..b456b53d20 100644
--- a/lib/kernel/src/disk_log_1.erl
+++ b/lib/kernel/src/disk_log_1.erl
@@ -630,7 +630,7 @@ is_head(Bin) when is_binary(Bin) ->
 %%          Writes MaxB bytes on each file.  
 %%          Creates a file called Name.idx in the Dir.  This
 %%          file contains the last written FileName as one byte, and
-%%          follwing that, the sizes of each file (size 0 number of items).
+%%          following that, the sizes of each file (size 0 number of items).
 %%          On startup, this file is read, and the next available
 %%          filename is used as first log file.
 %%          Reports can be browsed with Report Browser Tool (rb), or
diff --git a/lib/kernel/src/dist_util.erl b/lib/kernel/src/dist_util.erl
index 08bd5946cd..781397e1ee 100644
--- a/lib/kernel/src/dist_util.erl
+++ b/lib/kernel/src/dist_util.erl
@@ -27,6 +27,7 @@
 
 %%-compile(export_all).
 -export([handshake_we_started/1, handshake_other_started/1,
+         strict_order_flags/0,
 	 start_timer/1, setup_timer/2, 
 	 reset_timer/1, cancel_timer/1,
 	 shutdown/3, shutdown/4]).
@@ -112,26 +113,14 @@ dflag2str(?DFLAG_BIG_CREATION) ->
     "BIG_CREATION";
 dflag2str(?DFLAG_SEND_SENDER) ->
     "SEND_SENDER";
+dflag2str(?DFLAG_BIG_SEQTRACE_LABELS) ->
+    "BIG_SEQTRACE_LABELS";
 dflag2str(_) ->
     "UNKNOWN".
 
 
-remove_flag(Flag, Flags) ->
-    case Flags band Flag of
-	0 ->
-	    Flags;
-	_ ->
-	    Flags - Flag
-    end.
-
-adjust_flags(ThisFlags, OtherFlags, RejectFlags) ->
-    case (?DFLAG_PUBLISHED band ThisFlags) band OtherFlags of
-	0 ->
-	    {remove_flag(?DFLAG_PUBLISHED, ThisFlags),
-	     remove_flag(?DFLAG_PUBLISHED, OtherFlags)};
-	_ ->
-	    {ThisFlags, OtherFlags band (bnot RejectFlags)}
-    end.
+adjust_flags(ThisFlags, OtherFlags) ->
+    ThisFlags band OtherFlags.
 
 publish_flag(hidden, _) ->
     0;
@@ -143,50 +132,35 @@ publish_flag(_, OtherNode) ->
 	    0
     end.
 
--define(DFLAGS_REMOVABLE,
-        (?DFLAG_DIST_HDR_ATOM_CACHE
-             bor ?DFLAG_HIDDEN_ATOM_CACHE
-             bor ?DFLAG_ATOM_CACHE)).
-
--define(DFLAGS_ADDABLE,
-        (?DFLAGS_ALL
-             band (bnot (?DFLAG_PUBLISHED
-                             bor ?DFLAG_HIDDEN_ATOM_CACHE
-                             bor ?DFLAG_ATOM_CACHE)))).
-
--define(DFLAGS_THIS_DEFAULT,
-        (?DFLAG_EXPORT_PTR_TAG
-             bor ?DFLAG_EXTENDED_PIDS_PORTS
-             bor ?DFLAG_EXTENDED_REFERENCES
-             bor ?DFLAG_DIST_MONITOR
-             bor ?DFLAG_FUN_TAGS
-             bor ?DFLAG_DIST_MONITOR_NAME
-             bor ?DFLAG_NEW_FUN_TAGS
-             bor ?DFLAG_BIT_BINARIES
-             bor ?DFLAG_NEW_FLOATS
-             bor ?DFLAG_UNICODE_IO
-             bor ?DFLAG_DIST_HDR_ATOM_CACHE
-             bor ?DFLAG_SMALL_ATOM_TAGS
-             bor ?DFLAG_UTF8_ATOMS
-             bor ?DFLAG_MAP_TAG
-             bor ?DFLAG_BIG_CREATION
-             bor ?DFLAG_SEND_SENDER)).
-
-make_this_flags(RequestType, AddFlags, RemoveFlags, OtherNode) ->
-    case RemoveFlags band (bnot ?DFLAGS_REMOVABLE) of
+
+%% Sync with dist.c
+-record(erts_dflags, {
+          default,      % flags erts prefers
+          mandatory,    % flags erts needs
+          addable,      % flags local dist implementation is allowed to add
+          rejectable,   % flags local dist implementation is allowed to reject
+          strict_order  % flags for features needing strict order delivery
+}).
+
+-spec strict_order_flags() -> integer().
+strict_order_flags() ->
+    EDF = erts_internal:get_dflags(),
+    EDF#erts_dflags.strict_order.
+
+make_this_flags(RequestType, AddFlags, RejectFlags, OtherNode,
+                #erts_dflags{}=EDF) ->
+    case RejectFlags band (bnot EDF#erts_dflags.rejectable) of
         0 -> ok;
         Rerror -> exit({"Rejecting non rejectable flags", Rerror})
     end,
-    case AddFlags band (bnot ?DFLAGS_ADDABLE) of
+    case AddFlags band (bnot EDF#erts_dflags.addable) of
         0 -> ok;
         Aerror -> exit({"Adding non addable flags", Aerror})
     end,
-    Flgs0 = ?DFLAGS_THIS_DEFAULT,
+    Flgs0 = EDF#erts_dflags.default,
     Flgs1 = Flgs0 bor publish_flag(RequestType, OtherNode),
     Flgs2 = Flgs1 bor AddFlags,
-    Flgs3 = Flgs2 band (bnot (?DFLAG_HIDDEN_ATOM_CACHE
-                                  bor ?DFLAG_ATOM_CACHE)),
-    Flgs3 band (bnot RemoveFlags).
+    Flgs2 band (bnot RejectFlags).
 
 handshake_other_started(#hs_data{request_type=ReqType,
                                  add_flags=AddFlgs0,
@@ -196,19 +170,18 @@ handshake_other_started(#hs_data{request_type=ReqType,
     RejFlgs = convert_flags(RejFlgs0),
     ReqFlgs = convert_flags(ReqFlgs0),
     {PreOtherFlags,Node,Version} = recv_name(HSData0),
-    PreThisFlags = make_this_flags(ReqType, AddFlgs, RejFlgs, Node),
-    {ThisFlags, OtherFlags} = adjust_flags(PreThisFlags,
-					   PreOtherFlags,
-                                           RejFlgs),
-    HSData = HSData0#hs_data{this_flags=ThisFlags,
-			     other_flags=OtherFlags,
+    EDF = erts_internal:get_dflags(),
+    PreThisFlags = make_this_flags(ReqType, AddFlgs, RejFlgs, Node, EDF),
+    ChosenFlags = adjust_flags(PreThisFlags, PreOtherFlags),
+    HSData = HSData0#hs_data{this_flags=ChosenFlags,
+			     other_flags=ChosenFlags,
 			     other_version=Version,
 			     other_node=Node,
 			     other_started=true,
                              add_flags=AddFlgs,
                              reject_flags=RejFlgs,
                              require_flags=ReqFlgs},
-    check_dflags(HSData),
+    check_dflags(HSData, EDF),
     is_allowed(HSData),
     ?debug({"MD5 connection from ~p (V~p)~n",
 	    [Node, HSData#hs_data.other_version]}),
@@ -247,13 +220,11 @@ is_allowed(#hs_data{other_node = Node,
 check_dflags(#hs_data{other_node = Node,
                       other_flags = OtherFlags,
                       other_started = OtherStarted,
-                      require_flags = RequiredFlags} = HSData) ->
-    Mandatory = ((?DFLAG_EXTENDED_REFERENCES
-                      bor ?DFLAG_EXTENDED_PIDS_PORTS
-                      bor ?DFLAG_UTF8_ATOMS)
-                     bor RequiredFlags),
-    Missing = check_mandatory(0, ?DFLAGS_ALL, Mandatory,
-                              OtherFlags, []),
+                      require_flags = RequiredFlags} = HSData,
+             #erts_dflags{}=EDF) ->
+
+    Mandatory = (EDF#erts_dflags.mandatory bor RequiredFlags),
+    Missing = check_mandatory(Mandatory, OtherFlags, []),
     case Missing of
         [] ->
             ok;
@@ -273,21 +244,20 @@ check_dflags(#hs_data{other_node = Node,
 	    ?shutdown2(Node, {check_dflags_failed, Missing})
     end.
 
-check_mandatory(_Bit, 0, _Mandatory, _OtherFlags, Missing) ->
+check_mandatory(0, _OtherFlags, Missing) ->
     Missing;
-check_mandatory(Bit, Left, Mandatory, OtherFlags, Missing) ->
-    DFlag = (1 bsl Bit),
-    NewLeft = Left band (bnot DFlag),
-    NewMissing = case {DFlag band Mandatory,
-                       DFlag band OtherFlags} of
-                     {DFlag, 0} ->
+check_mandatory(Mandatory, OtherFlags, Missing) ->
+    Left = Mandatory band (Mandatory - 1),   % clear lowest set bit
+    DFlag = Mandatory bxor Left,             % only lowest set bit
+    NewMissing = case DFlag band OtherFlags of
+                     0 ->
                          %% Mandatory and missing...
                          [dflag2str(DFlag) | Missing];
                      _ ->
-                         %% Not mandatory or present...
+                         %% Mandatory and present...
                          Missing
                  end,
-    check_mandatory(Bit+1, NewLeft, Mandatory, OtherFlags, NewMissing).
+    check_mandatory(Left, OtherFlags, NewMissing).
                     
 
 %% No nodedown will be sent if we fail before this process has
@@ -409,7 +379,8 @@ handshake_we_started(#hs_data{request_type=ReqType,
     AddFlgs = convert_flags(AddFlgs0),
     RejFlgs = convert_flags(RejFlgs0),
     ReqFlgs = convert_flags(ReqFlgs0),
-    PreThisFlags = make_this_flags(ReqType, AddFlgs, RejFlgs, Node),
+    EDF = erts_internal:get_dflags(),
+    PreThisFlags = make_this_flags(ReqType, AddFlgs, RejFlgs, Node, EDF),
     HSData = PreHSData#hs_data{this_flags = PreThisFlags,
                                add_flags = AddFlgs,
                                reject_flags = RejFlgs,
@@ -417,13 +388,11 @@ handshake_we_started(#hs_data{request_type=ReqType,
     send_name(HSData),
     recv_status(HSData),
     {PreOtherFlags,ChallengeA} = recv_challenge(HSData),
-    {ThisFlags,OtherFlags} = adjust_flags(PreThisFlags,
-                                          PreOtherFlags,
-                                          RejFlgs),
-    NewHSData = HSData#hs_data{this_flags = ThisFlags,
-			       other_flags = OtherFlags, 
+    ChosenFlags = adjust_flags(PreThisFlags, PreOtherFlags),
+    NewHSData = HSData#hs_data{this_flags = ChosenFlags,
+			       other_flags = ChosenFlags,
 			       other_started = false}, 
-    check_dflags(NewHSData),
+    check_dflags(NewHSData, EDF),
     MyChallenge = gen_challenge(),
     {MyCookie,HisCookie} = get_cookies(Node),
     send_challenge_reply(NewHSData,MyChallenge,
@@ -538,8 +507,8 @@ do_setnode(#hs_data{other_node = Node, socket = Socket,
 			      "no table space left for node ~w ** ~n",
 			      [Node]),
 		    ?shutdown(Node);
-                error:Other ->
-                    exit({Other, erlang:get_stacktrace()})
+                error:Other:Stacktrace ->
+                    exit({Other, Stacktrace})
 	    end;
 	_ ->
 	    error_msg("** Distribution connection error, "
@@ -587,7 +556,7 @@ con_loop({Kernel, Node, Socket, Type, DHandle, MFTick, MFGetstat,
 	{Kernel, aux_tick} ->
 	    case getstat(DHandle, Socket, MFGetstat) of
 		{ok, _, _, PendWrite} ->
-		    send_tick(Socket, PendWrite, MFTick);
+		    send_aux_tick(Type, Socket, PendWrite, MFTick);
 		_ ->
 		    ignore_it
 	    end,
@@ -840,49 +809,56 @@ send_status(#hs_data{socket = Socket, other_node = Node,
 
 %% The detection time interval is thus, by default, 45s < DT < 75s 
 
-%% A HIDDEN node is always (if not a pending write) ticked if 
-%% we haven't read anything as a hidden node only ticks when it receives 
-%% a TICK !! 
+%% A HIDDEN node is always ticked if we haven't read anything
+%% as a (primitive) hidden node only ticks when it receives a TICK !!
 	
 send_tick(DHandle, Socket, Tick, Type, MFTick, MFGetstat) ->
     #tick{tick = T0,
 	  read = Read,
 	  write = Write,
-	  ticked = Ticked} = Tick,
+	  ticked = Ticked0} = Tick,
     T = T0 + 1,
     T1 = T rem 4,
     case getstat(DHandle, Socket, MFGetstat) of
-	{ok, Read, _, _} when  Ticked =:= T ->
+	{ok, Read, _, _} when Ticked0 =:= T ->
 	    {error, not_responding};
-	{ok, Read, W, Pend} when Type =:= hidden ->
-	    send_tick(Socket, Pend, MFTick),
-	    {ok, Tick#tick{write = W + 1,
-			   tick = T1}};
-	{ok, Read, Write, Pend} ->
-	    send_tick(Socket, Pend, MFTick),
-	    {ok, Tick#tick{write = Write + 1,
-			   tick = T1}};
-	{ok, R, Write, Pend} ->
-	    send_tick(Socket, Pend, MFTick),
-	    {ok, Tick#tick{write = Write + 1,
-			   read = R,
-			   tick = T1,
-			   ticked = T}};
-	{ok, Read, W, _} ->
-	    {ok, Tick#tick{write = W,
-			   tick = T1}};
-	{ok, R, W, _} ->
-	    {ok, Tick#tick{write = W,
-			   read = R,
-			   tick = T1,
-			   ticked = T}};
+
+        {ok, R, W1, Pend} ->
+            RDiff = R - Read,
+            W2 = case need_to_tick(Type, RDiff, W1-Write, Pend) of
+                     true ->
+                         MFTick(Socket),
+                         W1 + 1;
+                     false ->
+                         W1
+                 end,
+
+            Ticked1 = case RDiff of
+                          0 -> Ticked0;
+                          _ -> T
+                      end,
+
+            {ok, Tick#tick{write = W2,
+                           tick = T1,
+                           read = R,
+                           ticked = Ticked1}};
+
 	Error ->
 	    Error
     end.
 
-send_tick(_, Pend, _) when Pend /= false, Pend /= 0 ->
+need_to_tick(_, _, 0, 0) ->       % nothing written and empty send queue
+    true;
+need_to_tick(_, _, 0, false) ->   % nothing written and empty send queue
+    true;
+need_to_tick(hidden, 0, _, _) ->  % nothing read from hidden
+    true;
+need_to_tick(_, _, _, _) ->
+    false.
+
+send_aux_tick(normal, _, Pend, _) when Pend /= false, Pend /= 0 ->
     ok; %% Dont send tick if pending write.
-send_tick(Socket, _Pend, MFTick) ->
+send_aux_tick(_Type, Socket, _Pend, MFTick) ->
     MFTick(Socket).
 
 %% ------------------------------------------------------------
diff --git a/lib/kernel/src/erl_boot_server.erl b/lib/kernel/src/erl_boot_server.erl
index 2a38266579..4ac945ce01 100644
--- a/lib/kernel/src/erl_boot_server.erl
+++ b/lib/kernel/src/erl_boot_server.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -58,13 +58,11 @@
 
 -define(single_addr_mask, {255, 255, 255, 255}).
 
--type ip4_address() :: {0..255,0..255,0..255,0..255}.
-
--spec start(Slaves) -> {'ok', Pid} | {'error', What} when
+-spec start(Slaves) -> {'ok', Pid} | {'error', Reason} when
       Slaves :: [Host],
-      Host :: atom(),
+      Host :: inet:ip_address() | inet:hostname(),
       Pid :: pid(),
-      What :: any().
+      Reason :: {'badarg', Slaves}.
 
 start(Slaves) ->
     case check_arg(Slaves) of
@@ -74,11 +72,11 @@ start(Slaves) ->
 	    {error, {badarg, Slaves}}
     end.
 
--spec start_link(Slaves) -> {'ok', Pid} | {'error', What} when
+-spec start_link(Slaves) -> {'ok', Pid} | {'error', Reason} when
       Slaves :: [Host],
-      Host :: atom(),
+      Host :: inet:ip_address() | inet:hostname(),
       Pid :: pid(),
-      What :: any().
+      Reason :: {'badarg', Slaves}.
 
 start_link(Slaves) ->
     case check_arg(Slaves) of
@@ -104,10 +102,10 @@ check_arg([], Result) ->
 check_arg(_, _Result) ->
     error.
 
--spec add_slave(Slave) -> 'ok' | {'error', What} when
+-spec add_slave(Slave) -> 'ok' | {'error', Reason} when
       Slave :: Host,
-      Host :: atom(),
-      What :: any().
+      Host :: inet:ip_address() | inet:hostname(),
+      Reason :: {'badarg', Slave}.
 
 add_slave(Slave) ->
     case inet:getaddr(Slave, inet) of
@@ -117,10 +115,10 @@ add_slave(Slave) ->
 	    {error, {badarg, Slave}}
     end.
 
--spec delete_slave(Slave) -> 'ok' | {'error', What} when
+-spec delete_slave(Slave) -> 'ok' | {'error', Reason} when
       Slave :: Host,
-      Host :: atom(),
-      What :: any().
+      Host :: inet:ip_address() | inet:hostname(),
+      Reason :: {'badarg', Slave}.
 
 delete_slave(Slave) ->
     case inet:getaddr(Slave, inet) of
@@ -130,7 +128,7 @@ delete_slave(Slave) ->
 	    {error, {badarg, Slave}}
     end.
 
--spec add_subnet(Mask :: ip4_address(), Addr :: ip4_address()) ->
+-spec add_subnet(Netmask :: inet:ip_address(), Addr :: inet:ip_address()) ->
 	'ok' | {'error', any()}.
 
 add_subnet(Mask, Addr) when is_tuple(Mask), is_tuple(Addr) ->
@@ -141,14 +139,15 @@ add_subnet(Mask, Addr) when is_tuple(Mask), is_tuple(Addr) ->
 	    {error, empty_subnet}
     end.
 
--spec delete_subnet(Mask :: ip4_address(), Addr :: ip4_address()) -> 'ok'.
+-spec delete_subnet(Netmask :: inet:ip_address(),
+                    Addr :: inet:ip_address()) -> 'ok'.
 
 delete_subnet(Mask, Addr) when is_tuple(Mask), is_tuple(Addr) ->
     gen_server:call(boot_server, {delete, {Mask, Addr}}).
 
 -spec which_slaves() -> Slaves when
-      Slaves :: [Host],
-      Host :: atom().
+      Slaves :: [Slave],
+      Slave :: {Netmask :: inet:ip_address(), Address :: inet:ip_address()}.
 
 which_slaves() ->
     gen_server:call(boot_server, which).
diff --git a/lib/kernel/src/error_handler.erl b/lib/kernel/src/error_handler.erl
index 59ca8e690d..a9582c6225 100644
--- a/lib/kernel/src/error_handler.erl
+++ b/lib/kernel/src/error_handler.erl
@@ -106,8 +106,8 @@ crash(M, F, A) ->
 crash(Tuple) ->
     try erlang:error(undef)
     catch
-	error:undef ->
-	    Stk = [Tuple|tl(erlang:get_stacktrace())],
+	error:undef:Stacktrace ->
+	    Stk = [Tuple|tl(Stacktrace)],
 	    erlang:raise(error, undef, Stk)
     end.
 
diff --git a/lib/kernel/src/erts_debug.erl b/lib/kernel/src/erts_debug.erl
index 2887014c1c..6f248626ca 100644
--- a/lib/kernel/src/erts_debug.erl
+++ b/lib/kernel/src/erts_debug.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@
 
 %% Low-level debugging support. EXPERIMENTAL!
 
--export([size/1,df/1,df/2,df/3,ic/1]).
+-export([size/1,df/1,df/2,df/3,dis_to_file/2,ic/1]).
 
 %% This module contains the following *experimental* BIFs:
 %%   disassemble/1
@@ -32,8 +32,7 @@
 %%% BIFs
 
 -export([breakpoint/2, disassemble/1, display/1, dist_ext_to_term/2,
-         dump_monitors/1, dump_links/1, flat_size/1,
-         get_internal_state/1, instructions/0,
+         flat_size/1, get_internal_state/1, instructions/0,
          map_info/1, same/2, set_internal_state/2,
          size_shared/1, copy_shared/1, dirty_cpu/2, dirty_io/2, dirty/3,
          lcnt_control/1, lcnt_control/2, lcnt_collect/0, lcnt_clear/0]).
@@ -70,18 +69,6 @@ display(_) ->
 dist_ext_to_term(_, _) ->
     erlang:nif_error(undef).
 
--spec dump_monitors(Id) -> true when
-      Id :: pid() | atom().
-
-dump_monitors(_) ->
-    erlang:nif_error(undef).
-
--spec dump_links(Id) -> true when
-      Id :: pid() | port() | atom().
-
-dump_links(_) ->
-    erlang:nif_error(undef).
-
 -spec flat_size(Term) -> non_neg_integer() when
       Term :: term().
 
@@ -378,6 +365,16 @@ df(Mod, Func, Arity) when is_atom(Mod), is_atom(Func) ->
     catch _:_ -> {undef,Mod}
     end.
 
+-spec dis_to_file(module(), file:filename()) -> df_ret().
+
+dis_to_file(Mod, Name) when is_atom(Mod) ->
+    try Mod:module_info(functions) of
+	Fs0 when is_list(Fs0) ->
+	    Fs = [{Mod,Func,Arity} || {Func,Arity} <- Fs0],
+	    dff(Name, Fs)
+    catch _:_ -> {undef,Mod}
+    end.
+
 dff(Name, Fs) ->
     case file:open(Name, [write,raw,delayed_write]) of
 	{ok,F} ->
diff --git a/lib/kernel/src/file.erl b/lib/kernel/src/file.erl
index 933f2d5f65..57d8fc7a15 100644
--- a/lib/kernel/src/file.erl
+++ b/lib/kernel/src/file.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -72,7 +72,7 @@
               io_device/0, name/0, name_all/0, posix/0]).
 
 %%% Includes and defines
--include("file.hrl").
+-include("file_int.hrl").
 
 -define(FILE_IO_SERVER_TABLE, file_io_servers).
 
@@ -101,14 +101,25 @@
 -type deep_list() :: [char() | atom() | deep_list()].
 -type name()      :: string() | atom() | deep_list().
 -type name_all()  :: string() | atom() | deep_list() | (RawFilename :: binary()).
--type posix()     :: 'eacces'  | 'eagain'  | 'ebadf'   | 'ebusy'  | 'edquot'
-		   | 'eexist'  | 'efault'  | 'efbig'   | 'eintr'  | 'einval'
-		   | 'eio'     | 'eisdir'  | 'eloop'   | 'emfile' | 'emlink'
-		   | 'enametoolong'
-		   | 'enfile'  | 'enodev'  | 'enoent'  | 'enomem' | 'enospc'
-		   | 'enotblk' | 'enotdir' | 'enotsup' | 'enxio'  | 'eperm'
-		   | 'epipe'   | 'erofs'   | 'espipe'  | 'esrch'  | 'estale'
-		   | 'exdev'.
+-type posix() ::
+        'eacces' | 'eagain' |
+        'ebadf' | 'ebadmsg' | 'ebusy' |
+        'edeadlk' | 'edeadlock' | 'edquot' |
+        'eexist' |
+        'efault' | 'efbig' | 'eftype' |
+        'eintr' | 'einval' | 'eio' | 'eisdir' |
+        'eloop' |
+        'emfile' | 'emlink' | 'emultihop' |
+        'enametoolong' | 'enfile' |
+        'enobufs' | 'enodev' | 'enolck' | 'enolink' | 'enoent' |
+        'enomem' | 'enospc' | 'enosr' | 'enostr' | 'enosys' |
+        'enotblk' | 'enotdir' | 'enotsup' | 'enxio' |
+        'eopnotsupp' | 'eoverflow' |
+        'eperm' | 'epipe' |
+        'erange' | 'erofs' |
+        'espipe'  | 'esrch'  | 'estale' |
+        'etxtbsy' |
+        'exdev'.
 -type date_time() :: calendar:datetime().
 -type posix_file_advise() :: 'normal' | 'sequential' | 'random'
                            | 'no_reuse' | 'will_need' | 'dont_need'.
@@ -454,41 +465,23 @@ raw_write_file_info(Name, #file_info{} = Info) ->
       Reason :: posix() | badarg | system_limit.
 
 open(Item, ModeList) when is_list(ModeList) ->
-    case lists:member(raw, ModeList) of
-	%% Raw file, use ?PRIM_FILE to handle this file
-	true ->
+    case {lists:member(raw, ModeList), lists:member(ram, ModeList)} of
+        {false, false} ->
+            %% File server file
             Args = [file_name(Item) | ModeList],
             case check_args(Args) of
                 ok ->
                     [FileName | _] = Args,
-                    %% We rely on the returned Handle (in {ok, Handle})
-                    %% being a pid() or a #file_descriptor{}
-                    ?PRIM_FILE:open(FileName, ModeList);
+                    call(open, [FileName, ModeList]);
                 Error ->
                     Error
-	    end;
-	false ->
-	    case lists:member(ram, ModeList) of
-		%% RAM file, use ?RAM_FILE to handle this file
-		true ->
-		    case check_args(ModeList) of
-			ok ->
-			    ?RAM_FILE:open(Item, ModeList);
-			Error ->
-			    Error
-		    end;
-		%% File server file
-		false ->
-		    Args = [file_name(Item) | ModeList],
-		    case check_args(Args) of 
-			ok ->
-			    [FileName | _] = Args,
-			    call(open, [FileName, ModeList]);
-			Error ->
-			    Error
-		    end
-	    end
+            end;
+        {true, _Either} ->
+            raw_file_io:open(file_name(Item), ModeList);
+        {false, true} ->
+            ram_file:open(Item, ModeList)
     end;
+
 %% Old obsolete mode specification in atom or 2-tuple format
 open(Item, Mode) ->
     open(Item, mode_list(Mode)).
@@ -1254,15 +1247,18 @@ sendfile(File, _Sock, _Offet, _Bytes, _Opts) when is_pid(File) ->
 sendfile(File, Sock, Offset, Bytes, []) ->
     sendfile(File, Sock, Offset, Bytes, ?MAX_CHUNK_SIZE, [], [], []);
 sendfile(File, Sock, Offset, Bytes, Opts) ->
-    ChunkSize0 = proplists:get_value(chunk_size, Opts, ?MAX_CHUNK_SIZE),
-    ChunkSize = if ChunkSize0 > ?MAX_CHUNK_SIZE ->
-			?MAX_CHUNK_SIZE;
-		   true -> ChunkSize0
-		end,
-    %% Support for headers, trailers and options has been removed because the
-    %% Darwin and BSD API for using it does not play nice with
-    %% non-blocking sockets. See unix_efile.c for more info.
-    sendfile(File, Sock, Offset, Bytes, ChunkSize, [], [], Opts).
+    try proplists:get_value(chunk_size, Opts, ?MAX_CHUNK_SIZE) of
+        ChunkSize0 when is_integer(ChunkSize0) ->
+            ChunkSize = erlang:min(ChunkSize0, ?MAX_CHUNK_SIZE),
+            %% Support for headers, trailers and options has been removed
+            %% because the Darwin and BSD API for using it does not play nice
+            %% with non-blocking sockets. See unix_efile.c for more info.
+            sendfile(File, Sock, Offset, Bytes, ChunkSize, [], [], Opts);
+        _Other ->
+            {error, badarg}
+    catch
+        error:_ -> {error, badarg}
+    end.
 
 %% sendfile/2
 -spec sendfile(Filename, Socket) ->
@@ -1397,8 +1393,8 @@ eval_stream2({ok,Form,EndLine}, Fd, H, Last, E, Bs0) ->
     try erl_eval:exprs(Form, Bs0) of
 	{value,V,Bs} ->
 	    eval_stream(Fd, H, EndLine, {V}, E, Bs)
-    catch Class:Reason ->
-            Error = {EndLine,?MODULE,{Class,Reason,erlang:get_stacktrace()}},
+    catch Class:Reason:StackTrace ->
+            Error = {EndLine,?MODULE,{Class,Reason,StackTrace}},
 	    eval_stream(Fd, H, EndLine, Last, [Error|E], Bs0)
     end;
 eval_stream2({error,What,EndLine}, Fd, H, Last, E, Bs) ->
diff --git a/lib/compiler/src/v3_life.hrl b/lib/kernel/src/file_int.hrl
index 5c76312067..bafc330c04 100644
--- a/lib/compiler/src/v3_life.hrl
+++ b/lib/kernel/src/file_int.hrl
@@ -1,8 +1,8 @@
 %%
 %% %CopyrightBegin%
-%% 
-%% Copyright Ericsson AB 1999-2016. All Rights Reserved.
-%% 
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
 %% You may obtain a copy of the License at
@@ -14,16 +14,20 @@
 %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 %% See the License for the specific language governing permissions and
 %% limitations under the License.
-%% 
+%%
 %% %CopyrightEnd%
 %%
-%% This record contains variable life-time annotation for a
-%% kernel expression.  Added by v3_life, used by v3_codegen.
 
--type vdb_entry() :: {atom(),non_neg_integer(),non_neg_integer()}.
+%%
+%% Internal definitions for the 'file' module and friends.
+%%
+
+-ifndef(FILE_INTERNAL_HRL_).
+-define(FILE_INTERNAL_HRL_, 1).
+
+-include("file.hrl").
 
--record(l, {ke,					%Kernel expression
-	    i=0 :: non_neg_integer(),           %Op number
-	    vdb=[] :: [vdb_entry()],            %Variable database
-	    a=[] :: [term()]}).                 %Core annotation
+-define(CALL_FD(Fd, Method, Args),
+    apply(Fd#file_descriptor.module, Method, [Fd | Args])).
 
+-endif.
diff --git a/lib/kernel/src/file_io_server.erl b/lib/kernel/src/file_io_server.erl
index deb7b315b1..34d5497a4a 100644
--- a/lib/kernel/src/file_io_server.erl
+++ b/lib/kernel/src/file_io_server.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2000-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -28,7 +28,8 @@
 
 -record(state, {handle,owner,mref,buf,read_mode,unic}).
 
--define(PRIM_FILE, prim_file).
+-include("file_int.hrl").
+
 -define(READ_SIZE_LIST, 128).
 -define(READ_SIZE_BINARY, (8*1024)).
 
@@ -67,8 +68,9 @@ do_start(Spawn, Owner, FileName, ModeList) ->
 		  erlang:dt_restore_tag(Utag),
 		  %% process_flag(trap_exit, true),
 		  case parse_options(ModeList) of
-		      {ReadMode, UnicodeMode, Opts} ->
-			  case ?PRIM_FILE:open(FileName, Opts) of
+                      {ReadMode, UnicodeMode, Opts0} ->
+                          Opts = maybe_add_read_ahead(ReadMode, Opts0),
+			  case raw_file_io:open(FileName, [raw | Opts]) of
 			      {error, Reason} = Error ->
 				  Self ! {Ref, Error},
 				  exit(Reason);
@@ -157,6 +159,24 @@ valid_enc({utf32,little}) ->
 valid_enc(_Other) ->
     {error,badarg}.
 
+%% Add a small read_ahead buffer if the file is opened for reading
+%% only in list mode and no read_ahead is already given.
+maybe_add_read_ahead(binary, Opts) ->
+    Opts;
+maybe_add_read_ahead(list, Opts) ->
+    P = fun(read_ahead) -> true;
+           ({read_ahead,_}) -> true;
+           (append) -> true;
+           (exclusive) -> true;
+           (write) -> true;
+           (_) -> false
+        end,
+    case lists:any(P, Opts) of
+        false ->
+            [{read_ahead, 4096}|Opts];
+        true ->
+            Opts
+    end.
 
 server_loop(#state{mref = Mref} = State) ->
     receive
@@ -205,7 +225,7 @@ io_reply(From, ReplyAs, Reply) ->
 
 file_request({advise,Offset,Length,Advise},
          #state{handle=Handle}=State) ->
-    case ?PRIM_FILE:advise(Handle, Offset, Length, Advise) of
+    case ?CALL_FD(Handle, advise, [Offset, Length, Advise]) of
     {error,Reason}=Reply ->
         {stop,Reason,Reply,State};
     Reply ->
@@ -213,7 +233,7 @@ file_request({advise,Offset,Length,Advise},
     end;
 file_request({allocate, Offset, Length},
          #state{handle = Handle} = State) ->
-    Reply = ?PRIM_FILE:allocate(Handle, Offset, Length),
+    Reply = ?CALL_FD(Handle, allocate, [Offset, Length]),
     {reply, Reply, State};
 file_request({pread,At,Sz}, State)
   when At =:= cur;
@@ -256,7 +276,7 @@ file_request({pwrite,At,Data},
     end;
 file_request(datasync,
 	     #state{handle=Handle}=State) ->
-    case ?PRIM_FILE:datasync(Handle) of
+    case ?CALL_FD(Handle, datasync, []) of
 	{error,Reason}=Reply ->
 	    {stop,Reason,Reply,State};
 	Reply ->
@@ -264,7 +284,7 @@ file_request(datasync,
     end;
 file_request(sync, 
 	     #state{handle=Handle}=State) ->
-    case ?PRIM_FILE:sync(Handle) of
+    case ?CALL_FD(Handle, sync, []) of
 	{error,Reason}=Reply ->
 	    {stop,Reason,Reply,State};
 	Reply ->
@@ -272,7 +292,7 @@ file_request(sync,
     end;
 file_request(close, 
 	     #state{handle=Handle}=State) ->
-    case ?PRIM_FILE:close(Handle) of
+    case ?CALL_FD(Handle, close, []) of
 	{error,Reason}=Reply ->
 	    {stop,Reason,Reply,State#state{buf= <<>>}};
 	Reply ->
@@ -288,7 +308,7 @@ file_request({position,At},
     end;
 file_request(truncate, 
 	     #state{handle=Handle}=State) ->
-    case ?PRIM_FILE:truncate(Handle) of
+    case ?CALL_FD(Handle, truncate, []) of
 	{error,Reason}=Reply ->
 	    {stop,Reason,Reply,State#state{buf= <<>>}};
 	Reply ->
@@ -398,7 +418,7 @@ io_request_loop([Request|Tail],
 %%
 put_chars(Chars, latin1, #state{handle=Handle, unic=latin1}=State) ->
     NewState = State#state{buf = <<>>},
-    case ?PRIM_FILE:write(Handle, Chars) of
+    case ?CALL_FD(Handle, write, [Chars]) of
 	{error,Reason}=Reply ->
 	    {stop,Reason,Reply,NewState};
 	Reply ->
@@ -408,7 +428,7 @@ put_chars(Chars, InEncoding, #state{handle=Handle, unic=OutEncoding}=State) ->
     NewState = State#state{buf = <<>>},
     case unicode:characters_to_binary(Chars,InEncoding,OutEncoding) of
 	Bin when is_binary(Bin) ->
-	    case ?PRIM_FILE:write(Handle, Bin) of
+	    case ?CALL_FD(Handle, write, [Bin]) of
 		{error,Reason}=Reply ->
 		    {stop,Reason,Reply,NewState};
 		Reply ->
@@ -422,7 +442,7 @@ put_chars(Chars, InEncoding, #state{handle=Handle, unic=OutEncoding}=State) ->
 
 get_line(S, {<<>>, Cont}, OutEnc,
 	 #state{handle=Handle, read_mode=Mode, unic=InEnc}=State) ->
-    case ?PRIM_FILE:read(Handle, read_size(Mode)) of
+    case ?CALL_FD(Handle, read, [read_size(Mode)]) of
 	{ok,Bin} ->
 	    get_line(S, convert_enc([Cont, Bin], InEnc, OutEnc), OutEnc, State);
 	eof ->
@@ -472,7 +492,7 @@ get_chars(N, OutEnc,#state{handle=Handle,buf=Buf,read_mode=ReadMode,unic=latin1}
     BufSize = byte_size(Buf),
     NeedSize = N-BufSize,
     Size = erlang:max(NeedSize, ?READ_SIZE_BINARY),
-    case ?PRIM_FILE:read(Handle, Size) of
+    case ?CALL_FD(Handle, read, [Size]) of
 	{ok, B} ->
 	    if BufSize+byte_size(B) < N ->
 		    std_reply(cat(Buf, B, ReadMode,latin1,OutEnc), State);
@@ -504,7 +524,7 @@ get_chars(N, OutEnc,#state{handle=Handle,buf=Buf,read_mode=ReadMode,unic=InEncod
 		%% Need more, Try to read 4*needed in bytes...
 		NeedSize = (N - BufCount) * 4,
 		Size = erlang:max(NeedSize, ?READ_SIZE_BINARY),
-		case ?PRIM_FILE:read(Handle, Size) of
+		case ?CALL_FD(Handle, read, [Size]) of
 		    {ok, B} ->
 			NewBuf = list_to_binary([Buf,B]),
 			{NewCount,NewSplit} = count_and_find(NewBuf,N,InEncoding),
@@ -544,7 +564,7 @@ get_chars(Mod, Func, XtraArg, OutEnc, #state{buf=Buf}=State) ->
 
 get_chars_empty(Mod, Func, XtraArg, S, latin1,
 		#state{handle=Handle,read_mode=ReadMode, unic=latin1}=State) ->
-    case ?PRIM_FILE:read(Handle, read_size(ReadMode)) of
+    case ?CALL_FD(Handle, read, [read_size(ReadMode)]) of
 	{ok,Bin} ->
 	    get_chars_apply(Mod, Func, XtraArg, S, latin1, State, Bin);
 	eof ->
@@ -554,7 +574,7 @@ get_chars_empty(Mod, Func, XtraArg, S, latin1,
     end;
 get_chars_empty(Mod, Func, XtraArg, S, OutEnc,
 		#state{handle=Handle,read_mode=ReadMode}=State) ->
-    case ?PRIM_FILE:read(Handle, read_size(ReadMode)) of
+    case ?CALL_FD(Handle, read, [read_size(ReadMode)]) of
 	{ok,Bin} ->
 	    get_chars_apply(Mod, Func, XtraArg, S, OutEnc, State, Bin);
 	eof ->
@@ -564,7 +584,7 @@ get_chars_empty(Mod, Func, XtraArg, S, OutEnc,
     end.
 get_chars_notempty(Mod, Func, XtraArg, S, OutEnc,
 		   #state{handle=Handle,read_mode=ReadMode,buf = B}=State) ->
-    case ?PRIM_FILE:read(Handle, read_size(ReadMode)) of
+    case ?CALL_FD(Handle, read, [read_size(ReadMode)]) of
 	{ok,Bin} ->
 	    get_chars_apply(Mod, Func, XtraArg, S, OutEnc, State, list_to_binary([B,Bin]));
 	eof ->
@@ -918,13 +938,10 @@ cbv({utf32,little},_) ->
 %% Compensates ?PRIM_FILE:position/2 for the number of bytes 
 %% we have buffered
 position(Handle, At, Buf) ->
-    ?PRIM_FILE:position(
-       Handle,
-       case At of
-	   cur ->
-	       {cur, -byte_size(Buf)};
-	   {cur, Offs} ->
-	       {cur, Offs-byte_size(Buf)};
-	   _ ->
-	       At
-       end).
+    SeekTo =
+        case At of
+            {cur, Offs} -> {cur, Offs-byte_size(Buf)};
+            cur -> {cur, -byte_size(Buf)};
+            _ -> At
+        end,
+    ?CALL_FD(Handle, position, [SeekTo]).
diff --git a/lib/kernel/src/file_server.erl b/lib/kernel/src/file_server.erl
index 6e8f64d932..ecc1ffbdd6 100644
--- a/lib/kernel/src/file_server.erl
+++ b/lib/kernel/src/file_server.erl
@@ -63,7 +63,7 @@ stop() ->
 %%% Callback functions from gen_server
 %%%----------------------------------------------------------------------
 
--type state() :: port().	% Internal type
+-type state() :: term().	% Internal type
 
 %%----------------------------------------------------------------------
 %% Func: init/1
@@ -77,14 +77,8 @@ stop() ->
 
 init([]) ->
     process_flag(trap_exit, true),
-    case ?PRIM_FILE:start() of
-	{ok, Handle} ->
-	    ?FILE_IO_SERVER_TABLE =
-                ets:new(?FILE_IO_SERVER_TABLE, [named_table]),
-	    {ok, Handle};
-	{error, Reason} ->
-	    {stop, Reason}
-    end.
+    ?FILE_IO_SERVER_TABLE =  ets:new(?FILE_IO_SERVER_TABLE, [named_table]),
+    {ok, undefined}.
 
 %%----------------------------------------------------------------------
 %% Func: handle_call/3
@@ -101,7 +95,7 @@ init([]) ->
 	{'reply', 'eof' | 'ok' | {'error', term()} | {'ok', term()}, state()} |
 	{'stop', 'normal', 'stopped', state()}.
 
-handle_call({open, Name, ModeList}, {Pid, _Tag} = _From, Handle)
+handle_call({open, Name, ModeList}, {Pid, _Tag} = _From, State)
   when is_list(ModeList) ->
     Child = ?FILE_IO_SERVER:start_link(Pid, Name, ModeList),
     case Child of
@@ -110,78 +104,78 @@ handle_call({open, Name, ModeList}, {Pid, _Tag} = _From, Handle)
 	_ ->
 	    ok
     end,
-    {reply, Child, Handle};
+    {reply, Child, State};
 
-handle_call({open, _Name, _Mode}, _From, Handle) ->
-    {reply, {error, einval}, Handle};
+handle_call({open, _Name, _Mode}, _From, State) ->
+    {reply, {error, einval}, State};
 
-handle_call({read_file, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:read_file(Name), Handle};
+handle_call({read_file, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:read_file(Name), State};
 
-handle_call({write_file, Name, Bin}, _From, Handle) ->
-    {reply, ?PRIM_FILE:write_file(Name, Bin), Handle};
+handle_call({write_file, Name, Bin}, _From, State) ->
+    {reply, ?PRIM_FILE:write_file(Name, Bin), State};
 
-handle_call({set_cwd, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:set_cwd(Handle, Name), Handle};
+handle_call({set_cwd, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:set_cwd(Name), State};
 
-handle_call({delete, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:delete(Handle, Name), Handle};
+handle_call({delete, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:delete(Name), State};
 
-handle_call({rename, Fr, To}, _From, Handle) ->
-    {reply, ?PRIM_FILE:rename(Handle, Fr, To), Handle};
+handle_call({rename, Fr, To}, _From, State) ->
+    {reply, ?PRIM_FILE:rename(Fr, To), State};
 
-handle_call({make_dir, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:make_dir(Handle, Name), Handle};
+handle_call({make_dir, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:make_dir(Name), State};
 
-handle_call({del_dir, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:del_dir(Handle, Name), Handle};
+handle_call({del_dir, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:del_dir(Name), State};
 
-handle_call({list_dir, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:list_dir(Handle, Name), Handle};
-handle_call({list_dir_all, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:list_dir_all(Handle, Name), Handle};
+handle_call({list_dir, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:list_dir(Name), State};
+handle_call({list_dir_all, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:list_dir_all(Name), State};
 
-handle_call(get_cwd, _From, Handle) ->
-    {reply, ?PRIM_FILE:get_cwd(Handle), Handle};
-handle_call({get_cwd}, _From, Handle) ->
-    {reply, ?PRIM_FILE:get_cwd(Handle), Handle};
-handle_call({get_cwd, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:get_cwd(Handle, Name), Handle};
+handle_call(get_cwd, _From, State) ->
+    {reply, ?PRIM_FILE:get_cwd(), State};
+handle_call({get_cwd}, _From, State) ->
+    {reply, ?PRIM_FILE:get_cwd(), State};
+handle_call({get_cwd, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:get_cwd(Name), State};
 
-handle_call({read_file_info, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:read_file_info(Handle, Name), Handle};
+handle_call({read_file_info, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:read_file_info(Name), State};
 
-handle_call({read_file_info, Name, Opts}, _From, Handle) ->
-    {reply, ?PRIM_FILE:read_file_info(Handle, Name, Opts), Handle};
+handle_call({read_file_info, Name, Opts}, _From, State) ->
+    {reply, ?PRIM_FILE:read_file_info(Name, Opts), State};
 
-handle_call({altname, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:altname(Handle, Name), Handle};
+handle_call({altname, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:altname(Name), State};
 
-handle_call({write_file_info, Name, Info}, _From, Handle) ->
-    {reply, ?PRIM_FILE:write_file_info(Handle, Name, Info), Handle};
+handle_call({write_file_info, Name, Info}, _From, State) ->
+    {reply, ?PRIM_FILE:write_file_info(Name, Info), State};
 
-handle_call({write_file_info, Name, Info, Opts}, _From, Handle) ->
-    {reply, ?PRIM_FILE:write_file_info(Handle, Name, Info, Opts), Handle};
+handle_call({write_file_info, Name, Info, Opts}, _From, State) ->
+    {reply, ?PRIM_FILE:write_file_info(Name, Info, Opts), State};
 
-handle_call({read_link_info, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:read_link_info(Handle, Name), Handle};
+handle_call({read_link_info, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:read_link_info(Name), State};
 
-handle_call({read_link_info, Name, Opts}, _From, Handle) ->
-    {reply, ?PRIM_FILE:read_link_info(Handle, Name, Opts), Handle};
+handle_call({read_link_info, Name, Opts}, _From, State) ->
+    {reply, ?PRIM_FILE:read_link_info(Name, Opts), State};
 
-handle_call({read_link, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:read_link(Handle, Name), Handle};
-handle_call({read_link_all, Name}, _From, Handle) ->
-    {reply, ?PRIM_FILE:read_link_all(Handle, Name), Handle};
+handle_call({read_link, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:read_link(Name), State};
+handle_call({read_link_all, Name}, _From, State) ->
+    {reply, ?PRIM_FILE:read_link_all(Name), State};
 
-handle_call({make_link, Old, New}, _From, Handle) ->
-    {reply, ?PRIM_FILE:make_link(Handle, Old, New), Handle};
+handle_call({make_link, Old, New}, _From, State) ->
+    {reply, ?PRIM_FILE:make_link(Old, New), State};
 
-handle_call({make_symlink, Old, New}, _From, Handle) ->
-    {reply, ?PRIM_FILE:make_symlink(Handle, Old, New), Handle};
+handle_call({make_symlink, Old, New}, _From, State) ->
+    {reply, ?PRIM_FILE:make_symlink(Old, New), State};
 
 handle_call({copy, SourceName, SourceOpts, DestName, DestOpts, Length},
-	    _From, Handle) ->
+	    _From, State) ->
     Reply = 
 	case ?PRIM_FILE:open(SourceName, [read, binary | SourceOpts]) of
 	    {ok, Source} ->
@@ -201,14 +195,14 @@ handle_call({copy, SourceName, SourceOpts, DestName, DestOpts, Length},
 	    {error, _} = Error ->
 		Error
 	end,
-    {reply, Reply, Handle};
+    {reply, Reply, State};
 
-handle_call(stop, _From, Handle) ->
-    {stop, normal, stopped, Handle};
+handle_call(stop, _From, State) ->
+    {stop, normal, stopped, State};
 
-handle_call(Request, From, Handle) ->
+handle_call(Request, From, State) ->
     error_logger:error_msg("handle_call(~tp, ~tp, _)", [Request, From]),
-    {noreply, Handle}.
+    {noreply, State}.
 
 %%----------------------------------------------------------------------
 %% Func: handle_cast/2
@@ -233,14 +227,9 @@ handle_cast(Msg, State) ->
 -spec handle_info(term(), state()) ->
         {'noreply', state()} | {'stop', 'normal', state()}.
 
-handle_info({'EXIT', Pid, _Reason}, Handle) when is_pid(Pid) ->
+handle_info({'EXIT', Pid, _Reason}, State) when is_pid(Pid) ->
     ets:delete(?FILE_IO_SERVER_TABLE, Pid),
-    {noreply, Handle};
-
-handle_info({'EXIT', Handle, _Reason}, Handle) ->
-    error_logger:error_msg("Port controlling ~w terminated in ~w",
-			   [?FILE_SERVER, ?MODULE]),
-    {stop, normal, Handle};
+    {noreply, State};
 
 handle_info(Info, State) ->
     error_logger:error_msg("handle_Info(~tp, _)", [Info]),
@@ -254,8 +243,8 @@ handle_info(Info, State) ->
 
 -spec terminate(term(), state()) -> 'ok'.
 
-terminate(_Reason, Handle) ->
-    ?PRIM_FILE:stop(Handle).
+terminate(_Reason, _State) ->
+    ok.
 
 %%----------------------------------------------------------------------
 %% Func: code_change/3
diff --git a/lib/kernel/src/group.erl b/lib/kernel/src/group.erl
index e1198d2587..2c0518ccad 100644
--- a/lib/kernel/src/group.erl
+++ b/lib/kernel/src/group.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -114,7 +114,7 @@ server_loop(Drv, Shell, Buf0) ->
 	{io_request,From,ReplyAs,Req} when is_pid(From) ->
             %% This io_request may cause a transition to a couple of
             %% selective receive loops elsewhere in this module.
-            Buf = io_request(Req, From, ReplyAs, Drv, Buf0),
+            Buf = io_request(Req, From, ReplyAs, Drv, Shell, Buf0),
             server_loop(Drv, Shell, Buf);
         {reply,{{From,ReplyAs},Reply}} ->
             io_reply(From, ReplyAs, Reply),
@@ -135,7 +135,7 @@ server_loop(Drv, Shell, Buf0) ->
 	    exit(R);
 	%% We want to throw away any term that we don't handle (standard
 	%% practice in receive loops), but not any {Drv,_} tuples which are
-	%% handled in io_request/5.
+	%% handled in io_request/6.
 	NotDrvTuple when (not is_tuple(NotDrvTuple)) orelse
 			 (tuple_size(NotDrvTuple) =/= 2) orelse
 			 (element(1, NotDrvTuple) =/= Drv) ->
@@ -177,8 +177,8 @@ set_unicode_state(Drv,Bool) ->
     end.
 			   
 
-io_request(Req, From, ReplyAs, Drv, Buf0) ->
-    case io_request(Req, Drv, {From,ReplyAs}, Buf0) of
+io_request(Req, From, ReplyAs, Drv, Shell, Buf0) ->
+    case io_request(Req, Drv, Shell, {From,ReplyAs}, Buf0) of
 	{ok,Reply,Buf} ->
 	    io_reply(From, ReplyAs, Reply),
 	    Buf;
@@ -208,7 +208,7 @@ io_request(Req, From, ReplyAs, Drv, Buf0) ->
 %%
 %% These put requests have to be synchronous to the driver as otherwise
 %% there is no guarantee that the data has actually been printed.
-io_request({put_chars,unicode,Chars}, Drv, From, Buf) ->
+io_request({put_chars,unicode,Chars}, Drv, _Shell, From, Buf) ->
     case catch unicode:characters_to_binary(Chars,utf8) of
 	Binary when is_binary(Binary) ->
 	    send_drv(Drv, {put_chars_sync, unicode, Binary, {From,ok}}),
@@ -216,7 +216,7 @@ io_request({put_chars,unicode,Chars}, Drv, From, Buf) ->
 	_ ->
 	    {error,{error,{put_chars, unicode,Chars}},Buf}
     end;
-io_request({put_chars,unicode,M,F,As}, Drv, From, Buf) ->
+io_request({put_chars,unicode,M,F,As}, Drv, _Shell, From, Buf) ->
     case catch apply(M, F, As) of
 	Binary when is_binary(Binary) ->
 	    send_drv(Drv, {put_chars_sync, unicode, Binary, {From,ok}}),
@@ -230,12 +230,12 @@ io_request({put_chars,unicode,M,F,As}, Drv, From, Buf) ->
 		    {error,{error,F},Buf}
 	    end
     end;
-io_request({put_chars,latin1,Binary}, Drv, From, Buf) when is_binary(Binary) -> 
+io_request({put_chars,latin1,Binary}, Drv, _Shell, From, Buf) when is_binary(Binary) ->
     send_drv(Drv, {put_chars_sync, unicode,
                    unicode:characters_to_binary(Binary,latin1),
                    {From,ok}}),
     {noreply,Buf};
-io_request({put_chars,latin1,Chars}, Drv, From, Buf) ->
+io_request({put_chars,latin1,Chars}, Drv, _Shell, From, Buf) ->
     case catch unicode:characters_to_binary(Chars,latin1) of
 	Binary when is_binary(Binary) ->
 	    send_drv(Drv, {put_chars_sync, unicode, Binary, {From,ok}}),
@@ -243,7 +243,7 @@ io_request({put_chars,latin1,Chars}, Drv, From, Buf) ->
 	_ ->
 	    {error,{error,{put_chars,latin1,Chars}},Buf}
     end;
-io_request({put_chars,latin1,M,F,As}, Drv, From, Buf) ->
+io_request({put_chars,latin1,M,F,As}, Drv, _Shell, From, Buf) ->
     case catch apply(M, F, As) of
 	Binary when is_binary(Binary) ->
 	    send_drv(Drv, {put_chars_sync, unicode,
@@ -260,30 +260,30 @@ io_request({put_chars,latin1,M,F,As}, Drv, From, Buf) ->
 	    end
     end;
 
-io_request({get_chars,Encoding,Prompt,N}, Drv, _From, Buf) ->
-    get_chars_n(Prompt, io_lib, collect_chars, N, Drv, Buf, Encoding);
-io_request({get_line,Encoding,Prompt}, Drv, _From, Buf) ->
-    get_chars_line(Prompt, io_lib, collect_line, [], Drv, Buf, Encoding);
-io_request({get_until,Encoding, Prompt,M,F,As}, Drv, _From, Buf) ->
-    get_chars_line(Prompt, io_lib, get_until, {M,F,As}, Drv, Buf, Encoding);
-io_request({get_password,_Encoding},Drv,_From,Buf) ->
-    get_password_chars(Drv, Buf);
-io_request({setopts,Opts}, Drv, _From, Buf) when is_list(Opts) ->
+io_request({get_chars,Encoding,Prompt,N}, Drv, Shell, _From, Buf) ->
+    get_chars_n(Prompt, io_lib, collect_chars, N, Drv, Shell, Buf, Encoding);
+io_request({get_line,Encoding,Prompt}, Drv, Shell, _From, Buf) ->
+    get_chars_line(Prompt, io_lib, collect_line, [], Drv, Shell, Buf, Encoding);
+io_request({get_until,Encoding, Prompt,M,F,As}, Drv, Shell, _From, Buf) ->
+    get_chars_line(Prompt, io_lib, get_until, {M,F,As}, Drv, Shell, Buf, Encoding);
+io_request({get_password,_Encoding},Drv,Shell,_From,Buf) ->
+    get_password_chars(Drv, Shell, Buf);
+io_request({setopts,Opts}, Drv, _Shell, _From, Buf) when is_list(Opts) ->
     setopts(Opts, Drv, Buf);
-io_request(getopts, Drv, _From, Buf) ->
+io_request(getopts, Drv, _Shell, _From, Buf) ->
     getopts(Drv, Buf);
-io_request({requests,Reqs}, Drv, From, Buf) ->
-    io_requests(Reqs, {ok,ok,Buf}, From, Drv);
+io_request({requests,Reqs}, Drv, Shell, From, Buf) ->
+    io_requests(Reqs, {ok,ok,Buf}, From, Drv, Shell);
 
 %% New in R12
-io_request({get_geometry,columns},Drv,_From,Buf) ->
+io_request({get_geometry,columns},Drv,_Shell,_From,Buf) ->
     case get_tty_geometry(Drv) of
 	{W,_H} ->
 	    {ok,W,Buf};
 	_ ->
 	    {error,{error,enotsup},Buf}
     end;
-io_request({get_geometry,rows},Drv,_From,Buf) ->
+io_request({get_geometry,rows},Drv,_Shell,_From,Buf) ->
     case get_tty_geometry(Drv) of
 	{_W,H} ->
 	    {ok,H,Buf};
@@ -292,40 +292,40 @@ io_request({get_geometry,rows},Drv,_From,Buf) ->
     end;
 
 %% BC with pre-R13
-io_request({put_chars,Chars}, Drv, From, Buf) ->
-    io_request({put_chars,latin1,Chars}, Drv, From, Buf);
-io_request({put_chars,M,F,As}, Drv, From, Buf) ->
-    io_request({put_chars,latin1,M,F,As}, Drv, From, Buf);
-io_request({get_chars,Prompt,N}, Drv, From, Buf) ->
-    io_request({get_chars,latin1,Prompt,N}, Drv, From, Buf);
-io_request({get_line,Prompt}, Drv, From, Buf) ->
-    io_request({get_line,latin1,Prompt}, Drv, From, Buf);
-io_request({get_until, Prompt,M,F,As}, Drv, From, Buf) ->
-    io_request({get_until,latin1, Prompt,M,F,As}, Drv, From, Buf);
-io_request(get_password,Drv,From,Buf) ->
-    io_request({get_password,latin1},Drv,From,Buf);
-
-
-
-io_request(_, _Drv, _From, Buf) ->
+io_request({put_chars,Chars}, Drv, Shell, From, Buf) ->
+    io_request({put_chars,latin1,Chars}, Drv, Shell, From, Buf);
+io_request({put_chars,M,F,As}, Drv, Shell, From, Buf) ->
+    io_request({put_chars,latin1,M,F,As}, Drv, Shell, From, Buf);
+io_request({get_chars,Prompt,N}, Drv, Shell, From, Buf) ->
+    io_request({get_chars,latin1,Prompt,N}, Drv, Shell, From, Buf);
+io_request({get_line,Prompt}, Drv, Shell, From, Buf) ->
+    io_request({get_line,latin1,Prompt}, Drv, Shell, From, Buf);
+io_request({get_until, Prompt,M,F,As}, Drv, Shell, From, Buf) ->
+    io_request({get_until,latin1, Prompt,M,F,As}, Drv, Shell, From, Buf);
+io_request(get_password,Drv,Shell,From,Buf) ->
+    io_request({get_password,latin1},Drv,Shell,From,Buf);
+
+
+
+io_request(_, _Drv, _Shell, _From, Buf) ->
     {error,{error,request},Buf}.
 
-%% Status = io_requests(RequestList, PrevStat, From, Drv)
+%% Status = io_requests(RequestList, PrevStat, From, Drv, Shell)
 %%  Process a list of output requests as long as
 %%  the previous status is 'ok' or noreply.
 %%
 %%  We use undefined as the From for all but the last request
 %%  in order to discards acknowledgements from those requests.
 %%
-io_requests([R|Rs], {noreply,Buf}, From, Drv) ->
+io_requests([R|Rs], {noreply,Buf}, From, Drv, Shell) ->
     ReqFrom = if Rs =:= [] -> From; true -> undefined end,
-    io_requests(Rs, io_request(R, Drv, ReqFrom, Buf), From, Drv);
-io_requests([R|Rs], {ok,ok,Buf}, From, Drv) ->
+    io_requests(Rs, io_request(R, Drv, Shell, ReqFrom, Buf), From, Drv, Shell);
+io_requests([R|Rs], {ok,ok,Buf}, From, Drv, Shell) ->
     ReqFrom = if Rs =:= [] -> From; true -> undefined end,
-    io_requests(Rs, io_request(R, Drv, ReqFrom, Buf), From, Drv);
-io_requests([_|_], Error, _From, _Drv) ->
+    io_requests(Rs, io_request(R, Drv, Shell, ReqFrom, Buf), From, Drv, Shell);
+io_requests([_|_], Error, _From, _Drv, _Shell) ->
     Error;
-io_requests([], Stat, _From, _) ->
+io_requests([], Stat, _From, _, _Shell) ->
     Stat.
 
 %% io_reply(From, ReplyAs, Reply)
@@ -333,7 +333,7 @@ io_requests([], Stat, _From, _) ->
 %%  The ACK contains the return value.
 
 io_reply(undefined, _ReplyAs, _Reply) ->
-    %% Ignore these replies as they are generated from io_requests/4.
+    %% Ignore these replies as they are generated from io_requests/5.
     ok;
 io_reply(From, ReplyAs, Reply) ->
     From ! {io_reply,ReplyAs,Reply},
@@ -442,8 +442,8 @@ getopts(Drv,Buf) ->
 %%	{Result,NewSaveBuffer}
 %%	{error,What,NewSaveBuffer}
 
-get_password_chars(Drv,Buf) ->
-    case get_password_line(Buf, Drv) of
+get_password_chars(Drv,Shell,Buf) ->
+    case get_password_line(Buf, Drv, Shell) of
 	{done, Line, Buf1} ->
 	    {ok, Line, Buf1};
 	interrupted ->
@@ -452,59 +452,59 @@ get_password_chars(Drv,Buf) ->
 	    {exit, terminated}
     end.
 
-get_chars_n(Prompt, M, F, Xa, Drv, Buf, Encoding) ->
+get_chars_n(Prompt, M, F, Xa, Drv, Shell, Buf, Encoding) ->
     Pbs = prompt_bytes(Prompt, Encoding),
     case get(echo) of
         true ->
-            get_chars_loop(Pbs, M, F, Xa, Drv, Buf, start, Encoding);
+            get_chars_loop(Pbs, M, F, Xa, Drv, Shell, Buf, start, Encoding);
         false ->
-            get_chars_n_loop(Pbs, M, F, Xa, Drv, Buf, start, Encoding)
+            get_chars_n_loop(Pbs, M, F, Xa, Drv, Shell, Buf, start, Encoding)
     end.
 
-get_chars_line(Prompt, M, F, Xa, Drv, Buf, Encoding) ->
+get_chars_line(Prompt, M, F, Xa, Drv, Shell, Buf, Encoding) ->
     Pbs = prompt_bytes(Prompt, Encoding),
-    get_chars_loop(Pbs, M, F, Xa, Drv, Buf, start, Encoding).
+    get_chars_loop(Pbs, M, F, Xa, Drv, Shell, Buf, start, Encoding).
 
-get_chars_loop(Pbs, M, F, Xa, Drv, Buf0, State, Encoding) ->
+get_chars_loop(Pbs, M, F, Xa, Drv, Shell, Buf0, State, Encoding) ->
     Result = case get(echo) of
 		 true ->
-		     get_line(Buf0, Pbs, Drv, Encoding);
+		     get_line(Buf0, Pbs, Drv, Shell, Encoding);
 		 false ->
 		     % get_line_echo_off only deals with lists
 		     % and does not need encoding...
-		     get_line_echo_off(Buf0, Pbs, Drv)
+		     get_line_echo_off(Buf0, Pbs, Drv, Shell)
 	     end,
     case Result of
 	{done,Line,Buf} ->
-            get_chars_apply(Pbs, M, F, Xa, Drv, Buf, State, Line, Encoding);
+            get_chars_apply(Pbs, M, F, Xa, Drv, Shell, Buf, State, Line, Encoding);
 	interrupted ->
 	    {error,{error,interrupted},[]};
 	terminated ->
 	    {exit,terminated}
     end.
 
-get_chars_apply(Pbs, M, F, Xa, Drv, Buf, State0, Line, Encoding) ->
+get_chars_apply(Pbs, M, F, Xa, Drv, Shell, Buf, State0, Line, Encoding) ->
     case catch M:F(State0, cast(Line,get(read_mode), Encoding), Encoding, Xa) of
         {stop,Result,Rest} ->
             {ok,Result,append(Rest, Buf, Encoding)};
         {'EXIT',_} ->
             {error,{error,err_func(M, F, Xa)},[]};
         State1 ->
-            get_chars_loop(Pbs, M, F, Xa, Drv, Buf, State1, Encoding)
+            get_chars_loop(Pbs, M, F, Xa, Drv, Shell, Buf, State1, Encoding)
     end.
 
-get_chars_n_loop(Pbs, M, F, Xa, Drv, Buf0, State, Encoding) ->
+get_chars_n_loop(Pbs, M, F, Xa, Drv, Shell, Buf0, State, Encoding) ->
     try M:F(State, cast(Buf0, get(read_mode), Encoding), Encoding, Xa) of
         {stop,Result,Rest} ->
             {ok, Result, Rest};
         State1 ->
-            case get_chars_echo_off(Pbs, Drv) of
+            case get_chars_echo_off(Pbs, Drv, Shell) of
                 interrupted ->
                     {error,{error,interrupted},[]};
                 terminated ->
                     {exit,terminated};
                 Buf ->
-                    get_chars_n_loop(Pbs, M, F, Xa, Drv, Buf, State1, Encoding)
+                    get_chars_n_loop(Pbs, M, F, Xa, Drv, Shell, Buf, State1, Encoding)
             end
     catch _:_ ->
             {error,{error,err_func(M, F, Xa)},[]}
@@ -523,24 +523,24 @@ err_func(_, F, _) ->
 %%	{done,LineChars,RestChars}
 %%	interrupted
 
-get_line(Chars, Pbs, Drv, Encoding) ->
+get_line(Chars, Pbs, Drv, Shell, Encoding) ->
     {more_chars,Cont,Rs} = edlin:start(Pbs),
     send_drv_reqs(Drv, Rs),
-    get_line1(edlin:edit_line(Chars, Cont), Drv, new_stack(get(line_buffer)), 
+    get_line1(edlin:edit_line(Chars, Cont), Drv, Shell, new_stack(get(line_buffer)),
 	      Encoding).
 
-get_line1({done,Line,Rest,Rs}, Drv, Ls, _Encoding) ->
+get_line1({done,Line,Rest,Rs}, Drv, _Shell, Ls, _Encoding) ->
     send_drv_reqs(Drv, Rs),
     save_line_buffer(Line, get_lines(Ls)),
     {done,Line,Rest};
-get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Ls0, Encoding) 
+get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Shell, Ls0, Encoding)
   when ((Mode =:= none) and (Char =:= $\^P))
        or ((Mode =:= meta_left_sq_bracket) and (Char =:= $A)) ->
     send_drv_reqs(Drv, Rs),
     case up_stack(save_line(Ls0, edlin:current_line(Cont))) of
 	{none,_Ls} ->
 	    send_drv(Drv, beep),
-	    get_line1(edlin:edit_line(Cs, Cont), Drv, Ls0, Encoding);
+	    get_line1(edlin:edit_line(Cs, Cont), Drv, Shell, Ls0, Encoding);
 	{Lcs,Ls} ->
 	    send_drv_reqs(Drv, edlin:erase_line(Cont)),
 	    {more_chars,Ncont,Nrs} = edlin:start(edlin:prompt(Cont)),
@@ -548,16 +548,17 @@ get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Ls0, Encoding)
 	    get_line1(edlin:edit_line1(lists:sublist(Lcs, 1, length(Lcs)-1),
 				      Ncont),
 		      Drv,
+		      Shell,
 		      Ls, Encoding)
     end;
-get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Ls0, Encoding)
+get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Shell, Ls0, Encoding)
   when ((Mode =:= none) and (Char =:= $\^N))
        or ((Mode =:= meta_left_sq_bracket) and (Char =:= $B)) ->
     send_drv_reqs(Drv, Rs),
     case down_stack(save_line(Ls0, edlin:current_line(Cont))) of
 	{none,_Ls} ->
 	    send_drv(Drv, beep),
-	    get_line1(edlin:edit_line(Cs, Cont), Drv, Ls0, Encoding);
+	    get_line1(edlin:edit_line(Cs, Cont), Drv, Shell, Ls0, Encoding);
 	{Lcs,Ls} ->
 	    send_drv_reqs(Drv, edlin:erase_line(Cont)),
 	    {more_chars,Ncont,Nrs} = edlin:start(edlin:prompt(Cont)),
@@ -565,6 +566,7 @@ get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Ls0, Encoding)
 	    get_line1(edlin:edit_line1(lists:sublist(Lcs, 1, length(Lcs)-1),
 				      Ncont),
 		      Drv,
+		      Shell,
 		      Ls, Encoding)
     end;
 %% ^R = backward search, ^S = forward search.
@@ -577,7 +579,7 @@ get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Ls0, Encoding)
 %% new modes: search, search_quit, search_found. These are added to
 %% the regular ones (none, meta_left_sq_bracket) and handle special
 %% cases of history search.
-get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Ls, Encoding)
+get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Shell, Ls, Encoding)
   when ((Mode =:= none) and (Char =:= $\^R)) ->
     send_drv_reqs(Drv, Rs),
     %% drop current line, move to search mode. We store the current
@@ -587,8 +589,8 @@ get_line1({undefined,{_A,Mode,Char},Cs,Cont,Rs}, Drv, Ls, Encoding)
     Pbs = prompt_bytes("(search)`': ", Encoding),
     {more_chars,Ncont,Nrs} = edlin:start(Pbs, search),
     send_drv_reqs(Drv, Nrs),
-    get_line1(edlin:edit_line1(Cs, Ncont), Drv, Ls, Encoding);
-get_line1({expand, Before, Cs0, Cont,Rs}, Drv, Ls0, Encoding) ->
+    get_line1(edlin:edit_line1(Cs, Ncont), Drv, Shell, Ls, Encoding);
+get_line1({expand, Before, Cs0, Cont,Rs}, Drv, Shell, Ls0, Encoding) ->
     send_drv_reqs(Drv, Rs),
     ExpandFun = get(expand_fun),
     {Found, Add, Matches} = ExpandFun(Before),
@@ -603,37 +605,37 @@ get_line1({expand, Before, Cs0, Cont,Rs}, Drv, Ls0, Encoding) ->
 		  send_drv(Drv, {put_chars, unicode, unicode:characters_to_binary(MatchStr,unicode)}),
 		  [$\^L | Cs1]
 	 end,
-    get_line1(edlin:edit_line(Cs, Cont), Drv, Ls0, Encoding);
-get_line1({undefined,_Char,Cs,Cont,Rs}, Drv, Ls, Encoding) ->
+    get_line1(edlin:edit_line(Cs, Cont), Drv, Shell, Ls0, Encoding);
+get_line1({undefined,_Char,Cs,Cont,Rs}, Drv, Shell, Ls, Encoding) ->
     send_drv_reqs(Drv, Rs),
     send_drv(Drv, beep),
-    get_line1(edlin:edit_line(Cs, Cont), Drv, Ls, Encoding);
+    get_line1(edlin:edit_line(Cs, Cont), Drv, Shell, Ls, Encoding);
 %% The search item was found and accepted (new line entered on the exact
 %% result found)
-get_line1({_What,Cont={line,_Prompt,_Chars,search_found},Rs}, Drv, Ls0, Encoding) ->
+get_line1({_What,Cont={line,_Prompt,_Chars,search_found},Rs}, Drv, Shell, Ls0, Encoding) ->
     Line = edlin:current_line(Cont),
     %% this may create duplicate entries.
     Ls = save_line(new_stack(get_lines(Ls0)), Line),
-    get_line1({done, Line, "", Rs}, Drv, Ls, Encoding);
+    get_line1({done, Line, "", Rs}, Drv, Shell, Ls, Encoding);
 %% The search mode has been exited, but the user wants to remain in line
 %% editing mode wherever that was, but editing the search result.
-get_line1({What,Cont={line,_Prompt,_Chars,search_quit},Rs}, Drv, Ls, Encoding) ->
+get_line1({What,Cont={line,_Prompt,_Chars,search_quit},Rs}, Drv, Shell, Ls, Encoding) ->
     Line = edlin:current_chars(Cont),
     %% Load back the old prompt with the correct line number.
     case get(search_quit_prompt) of
 	undefined -> % should not happen. Fallback.
 	    LsFallback = save_line(new_stack(get_lines(Ls)), Line),
-	    get_line1({done, "\n", Line, Rs}, Drv, LsFallback, Encoding);
+	    get_line1({done, "\n", Line, Rs}, Drv, Shell, LsFallback, Encoding);
 	Prompt -> % redraw the line and keep going with the same stack position
 	    NCont = {line,Prompt,{lists:reverse(Line),[]},none},
 	    send_drv_reqs(Drv, Rs),
 	    send_drv_reqs(Drv, edlin:erase_line(Cont)),
 	    send_drv_reqs(Drv, edlin:redraw_line(NCont)),
-	    get_line1({What, NCont ,[]}, Drv, pad_stack(Ls), Encoding)
+	    get_line1({What, NCont ,[]}, Drv, Shell, pad_stack(Ls), Encoding)
     end;
 %% Search mode is entered.
 get_line1({What,{line,Prompt,{RevCmd0,_Aft},search},Rs},
-       Drv, Ls0, Encoding) ->
+       Drv, Shell, Ls0, Encoding) ->
     send_drv_reqs(Drv, Rs),
     %% Figure out search direction. ^S and ^R are returned through edlin
     %% whenever we received a search while being already in search mode.
@@ -655,82 +657,88 @@ get_line1({What,{line,Prompt,{RevCmd0,_Aft},search},Rs},
 	    {Ls2, {RevCmd, "': "++Line}}
     end,
     Cont = {line,Prompt,NewStack,search},
-    more_data(What, Cont, Drv, Ls, Encoding);
-get_line1({What,Cont0,Rs}, Drv, Ls, Encoding) ->
+    more_data(What, Cont, Drv, Shell, Ls, Encoding);
+get_line1({What,Cont0,Rs}, Drv, Shell, Ls, Encoding) ->
     send_drv_reqs(Drv, Rs),
-    more_data(What, Cont0, Drv, Ls, Encoding).
+    more_data(What, Cont0, Drv, Shell, Ls, Encoding).
 
-more_data(What, Cont0, Drv, Ls, Encoding) ->
+more_data(What, Cont0, Drv, Shell, Ls, Encoding) ->
     receive
 	{Drv,{data,Cs}} ->
-	    get_line1(edlin:edit_line(Cs, Cont0), Drv, Ls, Encoding);
+	    get_line1(edlin:edit_line(Cs, Cont0), Drv, Shell, Ls, Encoding);
 	{Drv,eof} ->
-	    get_line1(edlin:edit_line(eof, Cont0), Drv, Ls, Encoding);
+	    get_line1(edlin:edit_line(eof, Cont0), Drv, Shell, Ls, Encoding);
 	{io_request,From,ReplyAs,Req} when is_pid(From) ->
 	    {more_chars,Cont,_More} = edlin:edit_line([], Cont0),
 	    send_drv_reqs(Drv, edlin:erase_line(Cont)),
-	    io_request(Req, From, ReplyAs, Drv, []), %WRONG!!!
+	    io_request(Req, From, ReplyAs, Drv, Shell, []), %WRONG!!!
 	    send_drv_reqs(Drv, edlin:redraw_line(Cont)),
-	    get_line1({more_chars,Cont,[]}, Drv, Ls, Encoding);
+	    get_line1({more_chars,Cont,[]}, Drv, Shell, Ls, Encoding);
         {reply,{{From,ReplyAs},Reply}} ->
             %% We take care of replies from puts here as well
             io_reply(From, ReplyAs, Reply),
-            more_data(What, Cont0, Drv, Ls, Encoding);
+            more_data(What, Cont0, Drv, Shell, Ls, Encoding);
 	{'EXIT',Drv,interrupt} ->
 	    interrupted;
 	{'EXIT',Drv,_} ->
-	    terminated
+	    terminated;
+	{'EXIT',Shell,R} ->
+	    exit(R)
     after
 	get_line_timeout(What)->
-	    get_line1(edlin:edit_line([], Cont0), Drv, Ls, Encoding)
+	    get_line1(edlin:edit_line([], Cont0), Drv, Shell, Ls, Encoding)
     end.
 
-get_line_echo_off(Chars, Pbs, Drv) ->
+get_line_echo_off(Chars, Pbs, Drv, Shell) ->
     send_drv_reqs(Drv, [{put_chars, unicode,Pbs}]),
-    get_line_echo_off1(edit_line(Chars,[]), Drv).
+    get_line_echo_off1(edit_line(Chars,[]), Drv, Shell).
 
-get_line_echo_off1({Chars,[]}, Drv) ->
+get_line_echo_off1({Chars,[]}, Drv, Shell) ->
     receive
 	{Drv,{data,Cs}} ->
-	    get_line_echo_off1(edit_line(Cs, Chars), Drv);
+	    get_line_echo_off1(edit_line(Cs, Chars), Drv, Shell);
 	{Drv,eof} ->
-	    get_line_echo_off1(edit_line(eof, Chars), Drv);
+	    get_line_echo_off1(edit_line(eof, Chars), Drv, Shell);
 	{io_request,From,ReplyAs,Req} when is_pid(From) ->
-	    io_request(Req, From, ReplyAs, Drv, []),
-	    get_line_echo_off1({Chars,[]}, Drv);
+	    io_request(Req, From, ReplyAs, Drv, Shell, []),
+	    get_line_echo_off1({Chars,[]}, Drv, Shell);
         {reply,{{From,ReplyAs},Reply}} when From =/= undefined ->
             %% We take care of replies from puts here as well
             io_reply(From, ReplyAs, Reply),
-            get_line_echo_off1({Chars,[]},Drv);
+            get_line_echo_off1({Chars,[]},Drv, Shell);
 	{'EXIT',Drv,interrupt} ->
 	    interrupted;
 	{'EXIT',Drv,_} ->
-	    terminated
+	    terminated;
+	{'EXIT',Shell,R} ->
+	    exit(R)
     end;
-get_line_echo_off1({Chars,Rest}, _Drv) ->
+get_line_echo_off1({Chars,Rest}, _Drv, _Shell) ->
     {done,lists:reverse(Chars),case Rest of done -> []; _ -> Rest end}.
 
-get_chars_echo_off(Pbs, Drv) ->
+get_chars_echo_off(Pbs, Drv, Shell) ->
     send_drv_reqs(Drv, [{put_chars, unicode,Pbs}]),
-    get_chars_echo_off1(Drv).
+    get_chars_echo_off1(Drv, Shell).
 
-get_chars_echo_off1(Drv) ->
+get_chars_echo_off1(Drv, Shell) ->
     receive
         {Drv, {data, Cs}} ->
             Cs;
 	{Drv, eof} ->
             eof;
 	{io_request,From,ReplyAs,Req} when is_pid(From) ->
-	    io_request(Req, From, ReplyAs, Drv, []),
-	    get_chars_echo_off1(Drv);
+	    io_request(Req, From, ReplyAs, Drv, Shell, []),
+	    get_chars_echo_off1(Drv, Shell);
         {reply,{{From,ReplyAs},Reply}} when From =/= undefined ->
             %% We take care of replies from puts here as well
             io_reply(From, ReplyAs, Reply),
-            get_chars_echo_off1(Drv);
+            get_chars_echo_off1(Drv, Shell);
 	{'EXIT',Drv,interrupt} ->
 	    interrupted;
 	{'EXIT',Drv,_} ->
-	    terminated
+	    terminated;
+	{'EXIT',Shell,R} ->
+	    exit(R)
     end.
 
 %% We support line editing for the ICANON mode except the following
@@ -861,30 +869,32 @@ search_down_stack(Stack, Substr) ->
 
 %% This is get_line without line editing (except for backspace) and
 %% without echo.
-get_password_line(Chars, Drv) ->
-    get_password1(edit_password(Chars,[]),Drv).
+get_password_line(Chars, Drv, Shell) ->
+    get_password1(edit_password(Chars,[]),Drv,Shell).
 
-get_password1({Chars,[]}, Drv) ->
+get_password1({Chars,[]}, Drv, Shell) ->
     receive
 	{Drv,{data,Cs}} ->
-	    get_password1(edit_password(Cs,Chars),Drv);
+	    get_password1(edit_password(Cs,Chars),Drv,Shell);
 	{io_request,From,ReplyAs,Req} when is_pid(From) ->
 	    %send_drv_reqs(Drv, [{delete_chars, -length(Pbs)}]),
-	    io_request(Req, From, ReplyAs, Drv, []), %WRONG!!!
+	    io_request(Req, From, ReplyAs, Drv, Shell, []), %WRONG!!!
 	    %% I guess the reason the above line is wrong is that Buf is
 	    %% set to []. But do we expect anything but plain output?
 
-	    get_password1({Chars, []}, Drv);
+	    get_password1({Chars, []}, Drv, Shell);
         {reply,{{From,ReplyAs},Reply}} ->
             %% We take care of replies from puts here as well
             io_reply(From, ReplyAs, Reply),
-            get_password1({Chars, []},Drv);
+            get_password1({Chars, []},Drv, Shell);
 	{'EXIT',Drv,interrupt} ->
 	    interrupted;
 	{'EXIT',Drv,_} ->
-	    terminated
+	    terminated;
+	{'EXIT',Shell,R} ->
+	    exit(R)
     end;
-get_password1({Chars,Rest},Drv) ->
+get_password1({Chars,Rest},Drv,_Shell) ->
     send_drv_reqs(Drv,[{put_chars, unicode, "\n"}]),
     {done,lists:reverse(Chars),case Rest of done -> []; _ -> Rest end}.
 
diff --git a/lib/kernel/src/group_history.erl b/lib/kernel/src/group_history.erl
index 91f3663cc5..9745848992 100644
--- a/lib/kernel/src/group_history.erl
+++ b/lib/kernel/src/group_history.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2017. All Rights Reserved.
+%% Copyright Ericsson AB 2017-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -260,7 +260,7 @@ resize_log(Name, _OldSize, NewSize) ->
         ok ->
             show('$#erlang-history-resize-result',
                  "ok~n", []);
-        {error, {new_size_too_small, _}} ->
+        {error, {new_size_too_small, _, _}} ->
             show('$#erlang-history-resize-result',
                  "failed (new size is too small)~n", []),
             disable_history();
diff --git a/lib/kernel/src/hipe_unified_loader.erl b/lib/kernel/src/hipe_unified_loader.erl
index f4c7c277ed..fd06f0f7d8 100644
--- a/lib/kernel/src/hipe_unified_loader.erl
+++ b/lib/kernel/src/hipe_unified_loader.erl
@@ -236,9 +236,10 @@ load_common(Mod, Bin, Beam, Architecture) ->
 	  lists:foreach(fun({FE, DestAddress}) ->
 			    hipe_bifs:set_native_address_in_fe(FE, DestAddress)
 			end, erase(closures_to_patch)),
-          ok = hipe_bifs:commit_patch_load(LoaderState),
 	  set_beam_call_traps(FunDefs),
-	  ok;
+	  export_funs(FunDefs),
+          ok = hipe_bifs:commit_patch_load(LoaderState),
+          ok;
 	BeamBinary when is_binary(BeamBinary) ->
 	  %% Find all closures in the code.
 	  [] = erase(closures_to_patch),	%Clean up, assertion.
@@ -274,6 +275,7 @@ needs_trampolines(Architecture) ->
     arm -> true;
     powerpc -> true;
     ppc64 -> true;
+    amd64 -> true;
     _ -> false
   end.
 
diff --git a/lib/kernel/src/inet.erl b/lib/kernel/src/inet.erl
index dc20c21c77..73c53b9011 100644
--- a/lib/kernel/src/inet.erl
+++ b/lib/kernel/src/inet.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -34,7 +34,8 @@
 	 ip/1, stats/0, options/0, 
 	 pushf/3, popf/1, close/1, gethostname/0, gethostname/1, 
 	 parse_ipv4_address/1, parse_ipv6_address/1, parse_ipv4strict_address/1,
-	 parse_ipv6strict_address/1, parse_address/1, parse_strict_address/1, ntoa/1]).
+	 parse_ipv6strict_address/1, parse_address/1, parse_strict_address/1,
+         ntoa/1, ipv4_mapped_ipv6_address/1]).
 
 -export([connect_options/2, listen_options/2, udp_options/2, sctp_options/2]).
 -export([udp_module/1, tcp_module/1, tcp_module/2, sctp_module/1]).
@@ -72,7 +73,7 @@
 %% timer interface
 -export([start_timer/1, timeout/1, timeout/2, stop_timer/1]).
 
--export_type([address_family/0, hostent/0, hostname/0, ip4_address/0,
+-export_type([address_family/0, socket_protocol/0, hostent/0, hostname/0, ip4_address/0,
               ip6_address/0, ip_address/0, port_number/0,
 	      local_address/0, socket_address/0, returned_non_ip_address/0,
 	      socket_setopt/0, socket_getopt/0,
@@ -104,7 +105,20 @@
 	{local, binary()} |
 	{unspec, <<>>} |
 	{undefined, any()}.
--type posix() :: exbadport | exbadseq | file:posix().
+-type posix() ::
+        'eaddrinuse' | 'eaddrnotavail' | 'eafnosupport' | 'ealready' |
+        'econnaborted' | 'econnrefused' | 'econnreset' |
+        'edestaddrreq' |
+        'ehostdown' | 'ehostunreach' |
+        'einprogress' | 'eisconn' |
+        'emsgsize' |
+        'enetdown' | 'enetunreach' |
+        'enopkg' | 'enoprotoopt' | 'enotconn' | 'enotty' | 'enotsock' |
+        'eproto' | 'eprotonosupport' | 'eprototype' |
+        'esocktnosupport' |
+        'etimedout' |
+        'ewouldblock' |
+        'exbadport' | 'exbadseq' | file:posix().
 -type socket() :: port().
 
 -type socket_setopt() ::
@@ -675,6 +689,14 @@ parse_address(Addr) ->
 parse_strict_address(Addr) ->
     inet_parse:strict_address(Addr).
 
+-spec ipv4_mapped_ipv6_address(ip_address()) -> ip_address().
+ipv4_mapped_ipv6_address({D1,D2,D3,D4})
+  when (D1 bor D2 bor D3 bor D4) < 256 ->
+    {0,0,0,0,0,16#ffff,(D1 bsl 8) bor D2,(D3 bsl 8) bor D4};
+ipv4_mapped_ipv6_address({D1,D2,D3,D4,D5,D6,D7,D8})
+  when (D1 bor D2 bor D3 bor D4 bor D5 bor D6 bor D7 bor D8) < 65536 ->
+    {D7 bsr 8,D7 band 255,D8 bsr 8,D8 band 255}.
+
 %% Return a list of available options
 options() ->
     [
@@ -1244,9 +1266,7 @@ gethostbyname_string(Name, Type)
 	    inet ->
 		inet_parse:ipv4_address(Name);
 	    inet6 ->
-		%% XXX should we really translate IPv4 addresses here
-		%% even if we do not know if this host can do IPv6?
-		inet_parse:ipv6_address(Name)
+		inet_parse:ipv6strict_address(Name)
 	end of
 	{ok,IP} ->
 	    {ok,make_hostent(Name, [IP], [], Type)};
@@ -1452,11 +1472,14 @@ fdopen(Fd, Addr, Port, Opts, Protocol, Family, Type, Module) ->
 %%  socket stat
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+-spec i() -> ok.
 i() -> i(tcp), i(udp), i(sctp).
 
+-spec i(socket_protocol()) -> ok.
 i(Proto) -> i(Proto, [port, module, recv, sent, owner,
 		      local_address, foreign_address, state, type]).
 
+-spec i(socket_protocol(), [atom()]) -> ok.
 i(tcp, Fs) ->
     ii(tcp_sockets(), Fs, tcp);
 i(udp, Fs) ->
diff --git a/lib/kernel/src/inet_hosts.erl b/lib/kernel/src/inet_hosts.erl
index 0bdf00ac30..fc653bf0d3 100644
--- a/lib/kernel/src/inet_hosts.erl
+++ b/lib/kernel/src/inet_hosts.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -72,9 +72,6 @@ gethostbyname(Name, Type, Byname, Byaddr) ->
 
 gethostbyaddr({A,B,C,D}=IP) when ?ip(A,B,C,D) ->
     gethostbyaddr(IP, inet);
-%% ipv4  only ipv6 address
-gethostbyaddr({0,0,0,0,0,16#ffff=F,G,H}) when ?ip6(0,0,0,0,0,F,G,H) ->
-    gethostbyaddr({G bsr 8, G band 255, H bsr 8, H band 255});
 gethostbyaddr({A,B,C,D,E,F,G,H}=IP) when ?ip6(A,B,C,D,E,F,G,H) ->
     gethostbyaddr(IP, inet6);
 gethostbyaddr(Addr) when is_list(Addr) ->
diff --git a/lib/kernel/src/inet_int.hrl b/lib/kernel/src/inet_int.hrl
index bc5b67f7bf..357e27826c 100644
--- a/lib/kernel/src/inet_int.hrl
+++ b/lib/kernel/src/inet_int.hrl
@@ -100,6 +100,8 @@
 -define(TCP_REQ_RECV,           42).
 -define(TCP_REQ_UNRECV,         43).
 -define(TCP_REQ_SHUTDOWN,       44).
+-define(TCP_REQ_SENDFILE,       45).
+
 %% UDP and SCTP requests
 -define(PACKET_REQ_RECV,        60).
 %%-define(SCTP_REQ_LISTEN,        61). MERGED
@@ -319,6 +321,12 @@
 	[((X) bsr 24) band 16#ff, ((X) bsr 16) band 16#ff,
 	 ((X) bsr 8) band 16#ff, (X) band 16#ff]).
 
+-define(int64(X),
+	[((X) bsr 56) band 16#ff, ((X) bsr 48) band 16#ff,
+	 ((X) bsr 40) band 16#ff, ((X) bsr 32) band 16#ff,
+	 ((X) bsr 24) band 16#ff, ((X) bsr 16) band 16#ff,
+	 ((X) bsr 8) band 16#ff, (X) band 16#ff]).
+
 -define(intAID(X), % For SCTP AssocID
         ?int32(X)).
 
diff --git a/lib/kernel/src/inet_res.erl b/lib/kernel/src/inet_res.erl
index 49aa5f8bda..6454802b04 100644
--- a/lib/kernel/src/inet_res.erl
+++ b/lib/kernel/src/inet_res.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -349,9 +349,6 @@ gethostbyaddr_tm({A,B,C,D} = IP, Timer) when ?ip(A,B,C,D) ->
 	{ok, HEnt} -> {ok, HEnt};
 	_ -> res_gethostbyaddr(dn_in_addr_arpa(A,B,C,D), IP, Timer)
     end;
-%% ipv4  only ipv6 address
-gethostbyaddr_tm({0,0,0,0,0,16#ffff,G,H},Timer) when is_integer(G+H) ->
-    gethostbyaddr_tm({G div 256, G rem 256, H div 256, H rem 256},Timer);
 gethostbyaddr_tm({A,B,C,D,E,F,G,H} = IP, Timer) when ?ip6(A,B,C,D,E,F,G,H) ->
     inet_db:res_update_conf(),
     case inet_db:gethostbyaddr(IP) of
@@ -431,28 +428,7 @@ gethostbyname(Name,Family,Timeout) ->
 gethostbyname_tm(Name,inet,Timer) ->
     getbyname_tm(Name,?S_A,Timer);
 gethostbyname_tm(Name,inet6,Timer) ->
-    case getbyname_tm(Name,?S_AAAA,Timer) of
-	{ok,HEnt} -> {ok,HEnt};
-	{error,nxdomain} ->
-	    case getbyname_tm(Name, ?S_A,Timer) of
-		{ok, HEnt} ->
-		    %% rewrite to a ipv4 only ipv6 address
-		    {ok,
-		     HEnt#hostent {
-		       h_addrtype = inet6,
-		       h_length = 16,
-		       h_addr_list = 
-		       lists:map(
-			 fun({A,B,C,D}) ->
-				 {0,0,0,0,0,16#ffff,A*256+B,C*256+D}
-			 end, HEnt#hostent.h_addr_list)
-		      }};
-		Error ->
-		    Error
-	    end;
-	Error ->
-	    Error
-    end;
+    getbyname_tm(Name,?S_AAAA,Timer);
 gethostbyname_tm(_Name, _Family, _Timer) ->
     {error, einval}.
 	    
diff --git a/lib/kernel/src/kernel.app.src b/lib/kernel/src/kernel.app.src
index 080b11fc4d..82a3571da9 100644
--- a/lib/kernel/src/kernel.app.src
+++ b/lib/kernel/src/kernel.app.src
@@ -57,6 +57,7 @@
 	     inet_tcp_dist,
 	     kernel,
 	     kernel_config,
+	     kernel_refc,
 	     local_tcp,
 	     local_udp,
 	     net,
@@ -88,6 +89,13 @@
              inet_udp,
 	     inet_sctp,
              pg2,
+             raw_file_io,
+             raw_file_io_compressed,
+             raw_file_io_deflate,
+             raw_file_io_delayed,
+             raw_file_io_inflate,
+             raw_file_io_list,
+             raw_file_io_raw,
 	     seq_trace,
 	     standard_error,
 	     wrap_log_reader]},
@@ -107,6 +115,7 @@
 		heart,
 		init,
 		kernel_config,
+		kernel_refc,
 		kernel_sup,
 		net_kernel,
 		net_sup,
diff --git a/lib/kernel/src/kernel.appup.src b/lib/kernel/src/kernel.appup.src
index fc5417597f..4ee497bbbd 100644
--- a/lib/kernel/src/kernel.appup.src
+++ b/lib/kernel/src/kernel.appup.src
@@ -18,7 +18,9 @@
 %% %CopyrightEnd%
 {"%VSN%",
  %% Up from - max one major revision back
- [{<<"5\\.3(\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-20.*
+ [{<<"5\\.[0-3](\\.[0-9]+)*">>,[restart_new_emulator]}, % OTP-19.*, OTP-20.0
+  {<<"5\\.4(\\.[0-9]+)*">>,[restart_new_emulator]}],    % OTP-20.1+
  %% Down to - max one major revision back
- [{<<"5\\.3(\\.[0-9]+)*">>,[restart_new_emulator]}]  % OTP-20.*
+ [{<<"5\\.[0-3](\\.[0-9]+)*">>,[restart_new_emulator]}, % OTP-19.*, OTP-20.0
+  {<<"5\\.4(\\.[0-9]+)*">>,[restart_new_emulator]}]     % OTP-20.1+
 }.
diff --git a/lib/kernel/src/kernel.erl b/lib/kernel/src/kernel.erl
index cba57088ec..0382764b39 100644
--- a/lib/kernel/src/kernel.erl
+++ b/lib/kernel/src/kernel.erl
@@ -111,6 +111,13 @@ init([]) ->
                type => worker,
                modules => [kernel_config]},
 
+    RefC = #{id => kernel_refc,
+             start => {kernel_refc, start_link, []},
+             restart => permanent,
+             shutdown => 2000,
+             type => worker,
+             modules => [kernel_refc]},
+
     Code = #{id => code_server,
              start => {code, start_link, []},
              restart => permanent,
@@ -148,7 +155,7 @@ init([]) ->
 
     case init:get_argument(mode) of
         {ok, [["minimal"]]} ->
-            {ok, {SupFlags, [Code, File, StdError, User, Config, SafeSup]}};
+            {ok, {SupFlags, [Code, File, StdError, User, Config, RefC, SafeSup]}};
         _ ->
             Rpc = #{id => rex,
                     start => {rpc, start_link, []},
@@ -199,7 +206,7 @@ init([]) ->
             {ok, {SupFlags,
                   [Code, Rpc, Global, InetDb | DistAC] ++
                   [NetSup, GlGroup, File, SigSrv,
-                   StdError, User, Config, SafeSup] ++ Timer}}
+                   StdError, User, Config, RefC, SafeSup] ++ Timer}}
     end;
 init(safe) ->
     SupFlags = #{strategy => one_for_one,
diff --git a/lib/kernel/src/kernel_refc.erl b/lib/kernel/src/kernel_refc.erl
new file mode 100644
index 0000000000..05076dc885
--- /dev/null
+++ b/lib/kernel/src/kernel_refc.erl
@@ -0,0 +1,139 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(kernel_refc).
+
+-behaviour(gen_server).
+
+%% External exports
+-export([start_link/0, scheduler_wall_time/1]).
+%% Internal exports
+-export([init/1, handle_info/2, terminate/2]).
+-export([handle_call/3, handle_cast/2, code_change/3]).
+
+%%%-----------------------------------------------------------------
+%%% This module implements a process that handles reference counters for
+%%% various erts or other kernel resources which needs reference counting.
+%%%
+%%% Should not be documented nor used directly by user applications.
+%%%-----------------------------------------------------------------
+start_link() ->
+    gen_server:start_link({local,kernel_refc}, kernel_refc, [], []).
+
+-spec scheduler_wall_time(boolean()) -> boolean().
+scheduler_wall_time(Bool) ->
+    gen_server:call(kernel_refc, {scheduler_wall_time, self(), Bool}, infinity).
+
+%%-----------------------------------------------------------------
+%% Callback functions from gen_server
+%%-----------------------------------------------------------------
+
+-spec init([]) -> {'ok', map()} | {'stop', term()}.
+
+init([]) ->
+    resource(scheduler_wall_time, false),
+    {ok, #{scheduler_wall_time=>#{}}}.
+
+-spec handle_call(term(), term(), State) -> {'reply', term(), State}.
+handle_call({What, Who, false}, _From, State) ->
+    {Reply, Cnt} = do_stop(What, maps:get(What, State), Who),
+    {reply, Reply, State#{What:=Cnt}};
+handle_call({What, Who, true}, _From, State) ->
+    {Reply, Cnt} = do_start(What, maps:get(What, State), Who),
+    {reply, Reply, State#{What:=Cnt}};
+handle_call(_, _From, State) ->
+    {reply, badarg, State}.
+
+-spec handle_cast(term(), State) -> {'noreply', State}.
+handle_cast(_, State) ->
+    {noreply, State}.
+
+-spec handle_info(term(), State) -> {'noreply', State}.
+handle_info({'DOWN', _Ref, process, Pid, _}, State) ->
+    Cleanup = fun(Resource, Cnts) ->
+                      cleanup(Resource, Cnts, Pid)
+              end,
+    {noreply, maps:map(Cleanup, State)};
+handle_info(_, State) ->
+    {noreply, State}.
+
+-spec terminate(term(), term()) -> 'ok'.
+terminate(_Reason, _State) ->
+    ok.
+
+-spec code_change(term(), State, term()) -> {'ok', State}.
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+%%-----------------------------------------------------------------
+%% Internal functions
+%%-----------------------------------------------------------------
+
+do_start(Resource, Cnt, Pid) ->
+    case maps:get(Pid, Cnt, undefined) of
+        undefined ->
+            Ref = erlang:monitor(process, Pid),
+            case any(Cnt) of
+                true ->
+                    {true, Cnt#{Pid=>{1, Ref}}};
+                false ->
+                    resource(Resource, true),
+                    {false, Cnt#{Pid=>{1, Ref}}}
+            end;
+        {N, Ref} ->
+            {true, Cnt#{Pid=>{N+1, Ref}}}
+    end.
+
+do_stop(Resource, Cnt0, Pid) ->
+    case maps:get(Pid, Cnt0, undefined) of
+        undefined ->
+            {any(Cnt0), Cnt0};
+        {1, Ref} ->
+            erlang:demonitor(Ref, [flush]),
+            Cnt = maps:remove(Pid, Cnt0),
+            case any(Cnt) of
+                true ->
+                    {true, Cnt};
+                false ->
+                    resource(Resource, false),
+                    {true, Cnt}
+            end;
+        {N, Ref} ->
+            {true, Cnt0#{Pid=>{N-1, Ref}}}
+    end.
+
+cleanup(Resource, Cnt0, Pid) ->
+    case maps:is_key(Pid, Cnt0) of
+        true ->
+            Cnt = maps:remove(Pid, Cnt0),
+            case any(Cnt) of
+                true ->
+                    Cnt;
+                false ->
+                    resource(Resource, false),
+                    Cnt
+            end;
+        false ->
+            Cnt0
+    end.
+
+any(Cnt) -> maps:size(Cnt) > 0.
+
+resource(scheduler_wall_time, Enable) ->
+    _ = erts_internal:scheduler_wall_time(Enable).
diff --git a/lib/kernel/src/net_kernel.erl b/lib/kernel/src/net_kernel.erl
index f36b4f1e6a..669adefdf8 100644
--- a/lib/kernel/src/net_kernel.erl
+++ b/lib/kernel/src/net_kernel.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -70,8 +70,8 @@
 	 protocol_childspecs/0,
 	 epmd_module/0]).
 
--export([connect/1, disconnect/1, hidden_connect/1, passive_cnct/1]).
--export([hidden_connect_node/1]). %% explicit connect
+-export([disconnect/1, passive_cnct/1]).
+-export([hidden_connect_node/1]).
 -export([set_net_ticktime/1, set_net_ticktime/2, get_net_ticktime/0]).
 
 -export([node_info/1, node_info/2, nodes_info/0,
@@ -122,6 +122,7 @@
 
 -record(connection, {
 		     node,          %% remote node name
+                     conn_id,       %% Connection identity
 		     state,         %% pending | up | up_pending
 		     owner,         %% owner pid
 	             pending_owner, %% possible new owner
@@ -221,8 +222,7 @@ get_net_ticktime() ->
       Error :: error | {error, term()}.
 monitor_nodes(Flag) ->
     case catch process_flag(monitor_nodes, Flag) of
-	true -> ok;
-	false -> ok;
+	N when is_integer(N) -> ok;
 	_ -> mk_monitor_nodes_error(Flag, [])
     end.
 
@@ -235,8 +235,7 @@ monitor_nodes(Flag) ->
       Error :: error | {error, term()}.
 monitor_nodes(Flag, Opts) ->
     case catch process_flag({monitor_nodes, Opts}, Flag) of
-	true -> ok;
-	false -> ok;
+	N when is_integer(N) -> ok;
 	_ -> mk_monitor_nodes_error(Flag, Opts)
     end.
 
@@ -247,14 +246,15 @@ ticktime_res(A)      when is_atom(A)             -> A.
 
 %% Called though BIF's
 
-connect(Node) ->               do_connect(Node, normal, false).
 %%% Long timeout if blocked (== barred), only affects nodes with
 %%% {dist_auto_connect, once} set.
-passive_cnct(Node) ->              do_connect(Node, normal, true).
-disconnect(Node) ->            request({disconnect, Node}).
+passive_cnct(Node) ->
+    case request({passive_cnct, Node}) of
+        ignored -> false;
+        Other -> Other
+    end.
 
-%% connect but not seen
-hidden_connect(Node) ->        do_connect(Node, hidden, false).
+disconnect(Node) ->            request({disconnect, Node}).
 
 %% Should this node publish itself on Node?
 publish_on_node(Node) when is_atom(Node) ->
@@ -272,67 +272,30 @@ connect_node(Node) when is_atom(Node) ->
 hidden_connect_node(Node) when is_atom(Node) ->
     request({connect, hidden, Node}).
 
-do_connect(Node, Type, WaitForBarred) -> %% Type = normal | hidden
-    case catch ets:lookup(sys_dist, Node) of
-	{'EXIT', _} ->
-	    ?connect_failure(Node,{table_missing, sys_dist}),
-	    false;
-	[#barred_connection{}] ->
-	    case WaitForBarred of
-		false ->
-		    false;
-		true ->
-		    Pid = spawn(?MODULE,passive_connect_monitor,[self(),Node]),
-		    receive
-			{Pid, true} ->
-			    %%io:format("Net Kernel: barred connection (~p) "
-			    %%          "connected from other end.~n",[Node]),
-			    true;
-			{Pid, false} ->
-			    ?connect_failure(Node,{barred_connection,
-						   ets:lookup(sys_dist, Node)}),
-			    %%io:format("Net Kernel: barred connection (~p) "
-			    %%      "- failure.~n",[Node]),
-			    false
-		    end
-	    end;
-	Else ->
-	    case application:get_env(kernel, dist_auto_connect) of
-		{ok, never} ->
-		    ?connect_failure(Node,{dist_auto_connect,never}),
-		    false;
-		% This might happen due to connection close
-		% not beeing propagated to user space yet.
-		% Save the day by just not connecting...
-		{ok, once} when Else =/= [],
-				(hd(Else))#connection.state =:= up ->
-		    ?connect_failure(Node,{barred_connection,
-				ets:lookup(sys_dist, Node)}),
-		    false;
-		_ ->
-		    request({connect, Type, Node})
-	    end
-    end.
 
-passive_connect_monitor(Parent, Node) ->
+passive_connect_monitor(From, Node) ->
     ok = monitor_nodes(true,[{node_type,all}]),
-    case lists:member(Node,nodes([connected])) of
-	true ->
-	    ok = monitor_nodes(false,[{node_type,all}]),
-	    Parent ! {self(),true};
-	_ ->
-	    Ref = make_ref(),
-	    Tref = erlang:send_after(connecttime(),self(),Ref),
-	    receive
-		Ref ->
-		    ok = monitor_nodes(false,[{node_type,all}]),
-		    Parent ! {self(), false};
-		{nodeup,Node,_} ->
-		    ok = monitor_nodes(false,[{node_type,all}]),
-		    _ = erlang:cancel_timer(Tref),
-		    Parent ! {self(),true}
-	    end
-    end.
+    Reply = case lists:member(Node,nodes([connected])) of
+                true ->
+                    io:format("~p: passive_connect_monitor ~p\n", [self(), ?LINE]),
+                    true;
+                _ ->
+                    receive
+                        {nodeup,Node,_} ->
+                            io:format("~p: passive_connect_monitor ~p\n", [self(), ?LINE]),
+                            true
+                    after connecttime() ->
+                            io:format("~p: passive_connect_monitor ~p\n", [self(), ?LINE]),
+                            false
+                    end
+            end,
+    ok = monitor_nodes(false,[{node_type,all}]),
+    io:format("~p: passive_connect_monitor ~p\n", [self(), ?LINE]),
+    {Pid, Tag} = From,
+    io:format("~p: passive_connect_monitor ~p\n", [self(), ?LINE]),
+    erlang:send(Pid, {Tag, Reply}),
+    io:format("~p: passive_connect_monitor ~p\n", [self(), ?LINE]).
+
 
 %% If the net_kernel isn't running we ignore all requests to the
 %% kernel, thus basically accepting them :-)
@@ -394,40 +357,135 @@ init({Name, LongOrShortNames, TickT, CleanHalt}) ->
     end.
 
 
+do_auto_connect(Type, Node, ConnId, WaitForBarred, From, State) ->
+    ConnLookup = ets:lookup(sys_dist, Node),
+
+    case ConnLookup of
+        [#barred_connection{}] ->
+            case WaitForBarred of
+                false ->
+                    {reply, false, State};
+                true ->
+                    spawn(?MODULE,passive_connect_monitor,[From,Node]),
+                    {noreply, State}
+            end;
+
+        [#connection{conn_id=ConnId, state = up}] ->
+            {reply, true, State};
+        [#connection{conn_id=ConnId, waiting=Waiting}=Conn] ->
+            case From of
+                noreply -> ok;
+                _ -> ets:insert(sys_dist, Conn#connection{waiting = [From|Waiting]})
+            end,
+            {noreply, State};
+
+        _ ->
+            case application:get_env(kernel, dist_auto_connect) of
+                {ok, never} ->
+                    ?connect_failure(Node,{dist_auto_connect,never}),
+                    {reply, false, State};
+
+                %% This might happen due to connection close
+                %% not beeing propagated to user space yet.
+                %% Save the day by just not connecting...
+                {ok, once} when ConnLookup =/= [],
+                                (hd(ConnLookup))#connection.state =:= up ->
+                    ?connect_failure(Node,{barred_connection,
+                                           ets:lookup(sys_dist, Node)}),
+                    {reply, false, State};
+                _ ->
+                    case setup(ConnLookup, Node,ConnId,Type,From,State) of
+                        {ok, SetupPid} ->
+                            Owners = [{SetupPid, Node} | State#state.conn_owners],
+                            {noreply,State#state{conn_owners=Owners}};
+                        _Error  ->
+                            ?connect_failure(Node, {setup_call, failed, _Error}),
+                            {reply, false, State}
+                    end
+            end
+    end.
+
+
+do_explicit_connect([#connection{conn_id = ConnId, state = up}], _, _, ConnId, _From, State) ->
+    {reply, true, State};
+do_explicit_connect([#connection{conn_id = ConnId}=Conn], _, _, ConnId, From, State)
+  when Conn#connection.state =:= pending;
+       Conn#connection.state =:= up_pending ->
+    Waiting = Conn#connection.waiting,
+    ets:insert(sys_dist, Conn#connection{waiting = [From|Waiting]}),    
+    {noreply, State};
+do_explicit_connect([#barred_connection{}], Type, Node, ConnId, From , State) ->
+    %% Barred connection only affects auto_connect, ignore it.
+    do_explicit_connect([], Type, Node, ConnId, From , State);
+do_explicit_connect(ConnLookup, Type, Node, ConnId, From , State) ->
+    case setup(ConnLookup, Node,ConnId,Type,From,State) of
+        {ok, SetupPid} ->
+            Owners = [{SetupPid, Node} | State#state.conn_owners],
+            {noreply,State#state{conn_owners=Owners}};
+        _Error ->
+            ?connect_failure(Node, {setup_call, failed, _Error}),
+            {reply, false, State}
+    end.
+
+-define(ERTS_DIST_CON_ID_MASK, 16#ffffff).  % also in external.h
+
+verify_new_conn_id([], {Nr,_DHandle})
+  when (Nr band (bnot ?ERTS_DIST_CON_ID_MASK)) =:= 0 ->
+    true;
+verify_new_conn_id([#connection{conn_id = {Old,_}}], {New,_})
+  when New =:= ((Old+1) band ?ERTS_DIST_CON_ID_MASK) ->
+    true;
+verify_new_conn_id(_, _) ->
+    false.
+                                                              
+
+
 %% ------------------------------------------------------------
 %% handle_call.
 %% ------------------------------------------------------------
 
 %%
-%% Set up a connection to Node.
-%% The response is delayed until the connection is up and
-%% running.
+%% Passive auto-connect to Node.
+%% The response is delayed until the connection is up and running.
 %%
-handle_call({connect, _, Node}, From, State) when Node =:= node() ->
+handle_call({passive_cnct, Node}, From, State) when Node =:= node() ->
+    async_reply({reply, true, State}, From);
+handle_call({passive_cnct, Node}, From, State) ->
+    verbose({passive_cnct, Node}, 1, State),
+    Type = normal,
+    WaitForBarred = true,
+    R = case (catch erts_internal:new_connection(Node)) of
+            {Nr,_DHandle}=ConnId when is_integer(Nr) ->
+                do_auto_connect(Type, Node, ConnId, WaitForBarred, From, State);
+
+            _Error ->
+                error_logger:error_msg("~n** Cannot get connection id for node ~w~n",
+                                       [Node]),
+                {reply, false, State}
+        end,
+
+    return_call(R, From);
+
+%%
+%% Explicit connect
+%% The response is delayed until the connection is up and running.
+%%
+handle_call({connect, _, Node, _, _}, From, State) when Node =:= node() ->
     async_reply({reply, true, State}, From);
 handle_call({connect, Type, Node}, From, State) ->
     verbose({connect, Type, Node}, 1, State),
-    case ets:lookup(sys_dist, Node) of
-	[Conn] when Conn#connection.state =:= up ->
-	    async_reply({reply, true, State}, From);
-	[Conn] when Conn#connection.state =:= pending ->
-	    Waiting = Conn#connection.waiting,
-	    ets:insert(sys_dist, Conn#connection{waiting = [From|Waiting]}),
-	    {noreply, State};
-	[Conn] when Conn#connection.state =:= up_pending ->
-	    Waiting = Conn#connection.waiting,
-	    ets:insert(sys_dist, Conn#connection{waiting = [From|Waiting]}),
-	    {noreply, State};
-	_ ->
-	    case setup(Node,Type,From,State) of
-		{ok, SetupPid} ->
-		    Owners = [{SetupPid, Node} | State#state.conn_owners],
-		    {noreply,State#state{conn_owners=Owners}};
-		_Error  ->
-		    ?connect_failure(Node, {setup_call, failed, _Error}),
-		    async_reply({reply, false, State}, From)
-	    end
-    end;
+    ConnLookup = ets:lookup(sys_dist, Node),
+    R = case (catch erts_internal:new_connection(Node)) of
+            {Nr,_DHandle}=ConnId when is_integer(Nr) ->
+                do_explicit_connect(ConnLookup, Type, Node, ConnId, From, State);
+                    
+            _Error ->
+                error_logger:error_msg("~n** Cannot get connection id for node ~w~n",
+                                       [Node]),
+                {reply, false, State}                    
+        end,
+    return_call(R, From);
+            
 
 %%
 %% Close the connection to Node.
@@ -634,6 +692,26 @@ terminate(_Reason, State) ->
 %% ------------------------------------------------------------
 
 %%
+%% Asynchronous auto connect request
+%%
+handle_info({auto_connect,Node, Nr, DHandle}, State) ->
+    verbose({auto_connect, Node, Nr, DHandle}, 1, State),
+    ConnId = {Nr, DHandle},
+    NewState =
+        case do_auto_connect(normal, Node, ConnId, false, noreply, State) of
+            {noreply, S} ->           %% Pending connection
+                S;
+
+            {reply, true, S} ->  %% Already connected
+                S;
+
+            {reply, false, S} -> %% Connection refused
+                erts_internal:abort_connection(Node, ConnId),
+                S
+        end,
+    {noreply, NewState};
+
+%%
 %% accept a new connection.
 %%
 handle_info({accept,AcceptPid,Socket,Family,Proto}, State) ->
@@ -713,14 +791,23 @@ handle_info({AcceptPid, {accept_pending,MyNode,Node,Address,Type}}, State) ->
 	    AcceptPid ! {self(), {accept_pending, already_pending}},
 	    {noreply, State};
 	_ ->
-	    ets:insert(sys_dist, #connection{node = Node,
-					     state = pending,
-					     owner = AcceptPid,
-					     address = Address,
-					     type = Type}),
-	    AcceptPid ! {self(),{accept_pending,ok}},
-	    Owners = [{AcceptPid,Node} | State#state.conn_owners],
-	    {noreply, State#state{conn_owners = Owners}}
+            case (catch erts_internal:new_connection(Node)) of
+                {Nr,_DHandle}=ConnId when is_integer(Nr) ->
+                    ets:insert(sys_dist, #connection{node = Node,
+                                                     conn_id = ConnId,
+                                                     state = pending,
+                                                     owner = AcceptPid,
+                                                     address = Address,
+                                                     type = Type}),
+                    AcceptPid ! {self(),{accept_pending,ok}},
+                    Owners = [{AcceptPid,Node} | State#state.conn_owners],
+                    {noreply, State#state{conn_owners = Owners}};
+
+                _ ->
+                    error_logger:error_msg("~n** Cannot get connection id for node ~w~n",
+                                           [Node]),
+                    AcceptPid ! {self(),{accept_pending,nok_pending}}
+            end
     end;
 
 handle_info({SetupPid, {is_pending, Node}}, State) ->
@@ -906,6 +993,7 @@ pending_nodedown(Conn, Node, Type, State) ->
     % Don't bar connections that have never been alive
     %mark_sys_dist_nodedown(Node),
     % - instead just delete the node:
+    erts_internal:abort_connection(Node, Conn#connection.conn_id),
     ets:delete(sys_dist, Node),
     reply_waiting(Node,Conn#connection.waiting, false),
     case Type of
@@ -920,7 +1008,9 @@ up_pending_nodedown(Conn, Node, _Reason, _Type, State) ->
     AcceptPid = Conn#connection.pending_owner,
     Owners = State#state.conn_owners,
     Pend = lists:keydelete(AcceptPid, 1, State#state.pend_owners),
+    erts_internal:abort_connection(Node, Conn#connection.conn_id),
     Conn1 = Conn#connection { owner = AcceptPid,
+                              conn_id = erts_internal:new_connection(Node),
 			      pending_owner = undefined,
 			      state = pending },
     ets:insert(sys_dist, Conn1),
@@ -928,15 +1018,16 @@ up_pending_nodedown(Conn, Node, _Reason, _Type, State) ->
     State#state{conn_owners = [{AcceptPid,Node}|Owners], pend_owners = Pend}.
 
 
-up_nodedown(_Conn, Node, _Reason, Type, State) ->
-    mark_sys_dist_nodedown(Node),
+up_nodedown(Conn, Node, _Reason, Type, State) ->
+    mark_sys_dist_nodedown(Conn, Node),
     case Type of
 	normal -> ?nodedown(Node, State);
 	_ -> ok
     end,
     State.
 
-mark_sys_dist_nodedown(Node) ->
+mark_sys_dist_nodedown(Conn, Node) ->
+    erts_internal:abort_connection(Node, Conn#connection.conn_id),
     case application:get_env(kernel, dist_auto_connect) of
 	{ok, once} ->
 	    ets:insert(sys_dist, #barred_connection{node = Node});
@@ -1179,15 +1270,8 @@ spawn_func(_,{From,Tag},M,F,A,Gleader) ->
 %% Set up connection to a new node.
 %% -----------------------------------------------------------
 
-setup(Node,Type,From,State) ->
-    Allowed = State#state.allowed,
-    case lists:member(Node, Allowed) of
-	false when Allowed =/= [] ->
-	    error_msg("** Connection attempt with "
-		      "disallowed node ~w ** ~n", [Node]),
-	    {error, bad_node};
-	_ ->
-	    case select_mod(Node, State#state.listen) of
+setup(ConnLookup, Node,ConnId,Type,From,State) ->
+    case setup_check(ConnLookup, Node, ConnId, State) of
 		{ok, L} ->
 		    Mod = L#listen.module,
 		    LAddr = L#listen.address,
@@ -1200,18 +1284,45 @@ setup(Node,Type,From,State) ->
 		    Addr = LAddr#net_address {
 					      address = undefined,
 					      host = undefined },
+                    Waiting = case From of
+                                  noreply -> [];
+                                  _ -> [From]
+                              end,
 		    ets:insert(sys_dist, #connection{node = Node,
+                                                     conn_id = ConnId,
 						     state = pending,
 						     owner = Pid,
-						     waiting = [From],
+						     waiting = Waiting,
 						     address = Addr,
 						     type = normal}),
 		    {ok, Pid};
 		Error ->
 		    Error
-	    end
     end.
 
+setup_check(ConnLookup, Node, ConnId, State) ->
+    Allowed = State#state.allowed,    
+    case lists:member(Node, Allowed) of
+	false when Allowed =/= [] ->
+	    error_msg("** Connection attempt with "
+		      "disallowed node ~w ** ~n", [Node]),
+	    {error, bad_node};
+       _ ->
+            case verify_new_conn_id(ConnLookup, ConnId) of
+                false ->
+                    error_msg("** Connection attempt to ~w with "
+                              "bad connection id ~w ** ~n", [Node, ConnId]),
+                    {error, bad_conn_id};
+                true ->
+                    case select_mod(Node, State#state.listen) of
+                        {ok, _L}=OK -> OK;
+                        Error -> Error
+                    end
+            end
+    end.                    
+
+    
+
 %%
 %% Find a module that is willing to handle connection setup to Node
 %%
@@ -1652,6 +1763,11 @@ verbose(_, _, _) ->
 getnode(P) when is_pid(P) -> node(P);
 getnode(P) -> P.
 
+return_call({noreply, _State}=R, _From) ->
+    R;
+return_call(R, From) ->
+    async_reply(R, From).
+
 async_reply({reply, Msg, State}, From) ->
     async_gen_server_reply(From, Msg),
     {noreply, State}.
@@ -1659,16 +1775,16 @@ async_reply({reply, Msg, State}, From) ->
 async_gen_server_reply(From, Msg) ->
     {Pid, Tag} = From,
     M = {Tag, Msg},
-    case catch erlang:send(Pid, M, [nosuspend, noconnect]) of
+    try erlang:send(Pid, M, [nosuspend, noconnect]) of
         ok ->
             ok;
         nosuspend ->
             _ = spawn(fun() -> catch erlang:send(Pid, M, [noconnect]) end),
 	    ok;
         noconnect ->
-            ok; % The gen module takes care of this case.
-        {'EXIT', _} ->
-            ok
+            ok % The gen module takes care of this case.
+    catch
+        _:_ -> ok
     end.
 
 call_owner(Owner, Msg) ->
diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl
index b5f19d4b99..77c883f57f 100644
--- a/lib/kernel/src/os.erl
+++ b/lib/kernel/src/os.erl
@@ -21,18 +21,24 @@
 
 %% Provides a common operating system interface.
 
--export([type/0, version/0, cmd/1, find_executable/1, find_executable/2]).
+-export([type/0, version/0, cmd/1, cmd/2, find_executable/1, find_executable/2]).
 
 -include("file.hrl").
 
--export_type([env_var_name/0, env_var_value/0, env_var_name_value/0, command_input/0]).
+-export_type([env_var_name/0, env_var_value/0, env_var_name_value/0]).
+
+-export([getenv/0, getenv/1, getenv/2, putenv/2, unsetenv/1]).
 
 %%% BIFs
 
--export([getenv/0, getenv/1, getenv/2, getpid/0,
-         perf_counter/0, perf_counter/1,
-         putenv/2, set_signal/2, system_time/0, system_time/1,
-	 timestamp/0, unsetenv/1]).
+-export([get_env_var/1, getpid/0, list_env_vars/0, perf_counter/0,
+         perf_counter/1, set_env_var/2, set_signal/2, system_time/0,
+         system_time/1, timestamp/0, unset_env_var/1]).
+
+-type os_command() :: atom() | io_lib:chars().
+-type os_command_opts() :: #{ max_size => non_neg_integer() | infinity }.
+
+-export_type([os_command/0, os_command_opts/0]).
 
 -type env_var_name() :: nonempty_string().
 
@@ -40,31 +46,15 @@
 
 -type env_var_name_value() :: nonempty_string().
 
--type command_input() :: atom() | io_lib:chars().
-
--spec getenv() -> [env_var_name_value()].
-
-getenv() -> erlang:nif_error(undef).
-
--spec getenv(VarName) -> Value | false when
-      VarName :: env_var_name(),
-      Value :: env_var_value().
-
-getenv(_) ->
+-spec list_env_vars() -> [{env_var_name(), env_var_value()}].
+list_env_vars() ->
     erlang:nif_error(undef).
 
--spec getenv(VarName, DefaultValue) -> Value when
+-spec get_env_var(VarName) -> Value | false when
       VarName :: env_var_name(),
-      DefaultValue :: env_var_value(),
       Value :: env_var_value().
-
-getenv(VarName, DefaultValue) ->
-    case os:getenv(VarName) of
-        false ->
-           DefaultValue;
-        Value ->
-            Value
-    end.
+get_env_var(_VarName) ->
+    erlang:nif_error(undef).
 
 -spec getpid() -> Value when
       Value :: string().
@@ -84,11 +74,10 @@ perf_counter() ->
 perf_counter(Unit) ->
       erlang:convert_time_unit(os:perf_counter(), perf_counter, Unit).
 
--spec putenv(VarName, Value) -> true when
+-spec set_env_var(VarName, Value) -> true when
       VarName :: env_var_name(),
       Value :: env_var_value().
-
-putenv(_, _) ->
+set_env_var(_, _) ->
     erlang:nif_error(undef).
 
 -spec system_time() -> integer().
@@ -108,10 +97,9 @@ system_time(_Unit) ->
 timestamp() ->
     erlang:nif_error(undef).
 
--spec unsetenv(VarName) -> true when
+-spec unset_env_var(VarName) -> true when
       VarName :: env_var_name().
-
-unsetenv(_) ->
+unset_env_var(_) ->
     erlang:nif_error(undef).
 
 -spec set_signal(Signal, Option) -> 'ok' when
@@ -125,6 +113,39 @@ set_signal(_Signal, _Option) ->
 
 %%% End of BIFs
 
+-spec getenv() -> [env_var_name_value()].
+getenv() ->
+    [lists:flatten([Key, $=, Value]) || {Key, Value} <- os:list_env_vars() ].
+
+-spec getenv(VarName) -> Value | false when
+      VarName :: env_var_name(),
+      Value :: env_var_value().
+getenv(VarName) ->
+    os:get_env_var(VarName).
+
+-spec getenv(VarName, DefaultValue) -> Value when
+      VarName :: env_var_name(),
+      DefaultValue :: env_var_value(),
+      Value :: env_var_value().
+getenv(VarName, DefaultValue) ->
+    case os:getenv(VarName) of
+        false ->
+           DefaultValue;
+        Value ->
+            Value
+    end.
+
+-spec putenv(VarName, Value) -> true when
+      VarName :: env_var_name(),
+      Value :: env_var_value().
+putenv(VarName, Value) ->
+    os:set_env_var(VarName, Value).
+
+-spec unsetenv(VarName) -> true when
+      VarName :: env_var_name().
+unsetenv(VarName) ->
+    os:unset_env_var(VarName).
+
 -spec type() -> {Osfamily, Osname} when
       Osfamily :: unix | win32,
       Osname :: atom().
@@ -242,14 +263,20 @@ extensions() ->
 
 %% Executes the given command in the default shell for the operating system.
 -spec cmd(Command) -> string() when
-      Command :: os:command_input().
+      Command :: os_command().
 cmd(Cmd) ->
+    cmd(Cmd, #{ }).
+
+-spec cmd(Command, Options) -> string() when
+      Command :: os_command(),
+      Options :: os_command_opts().
+cmd(Cmd, Opts) ->
     {SpawnCmd, SpawnOpts, SpawnInput, Eot} = mk_cmd(os:type(), validate(Cmd)),
     Port = open_port({spawn, SpawnCmd}, [binary, stderr_to_stdout,
                                          stream, in, hide | SpawnOpts]),
     MonRef = erlang:monitor(port, Port),
     true = port_command(Port, SpawnInput),
-    Bytes = get_data(Port, MonRef, Eot, []),
+    Bytes = get_data(Port, MonRef, Eot, [], 0, maps:get(max_size, Opts, infinity)),
     demonitor(MonRef, [flush]),
     String = unicode:characters_to_list(Bytes),
     if  %% Convert to unicode list if possible otherwise return bytes
@@ -314,12 +341,13 @@ validate2([List|Rest]) when is_list(List) ->
     validate2(List),
     validate2(Rest).
 
-get_data(Port, MonRef, Eot, Sofar) ->
+get_data(Port, MonRef, Eot, Sofar, Size, Max) ->
     receive
 	{Port, {data, Bytes}} ->
-            case eot(Bytes, Eot) of
+            case eot(Bytes, Eot, Size, Max) of
                 more ->
-                    get_data(Port, MonRef, Eot, [Sofar,Bytes]);
+                    get_data(Port, MonRef, Eot, [Sofar, Bytes],
+                             Size + byte_size(Bytes), Max);
                 Last ->
                     catch port_close(Port),
                     flush_until_down(Port, MonRef),
@@ -330,13 +358,16 @@ get_data(Port, MonRef, Eot, Sofar) ->
 	    iolist_to_binary(Sofar)
     end.
 
-eot(_Bs, <<>>) ->
+eot(Bs, <<>>, Size, Max) when Size + byte_size(Bs) < Max ->
     more;
-eot(Bs, Eot) ->
+eot(Bs, <<>>, Size, Max) ->
+    binary:part(Bs, {0, Max - Size});
+eot(Bs, Eot, Size, Max) ->
     case binary:match(Bs, Eot) of
-        nomatch -> more;
-        {Pos, _} ->
-            binary:part(Bs,{0, Pos})
+        {Pos, _} when Size + Pos < Max ->
+            binary:part(Bs,{0, Pos});
+        _ ->
+            eot(Bs, <<>>, Size, Max)
     end.
 
 %% When port_close returns we know that all the
diff --git a/lib/kernel/src/raw_file_io.erl b/lib/kernel/src/raw_file_io.erl
new file mode 100644
index 0000000000..e3c07c8f78
--- /dev/null
+++ b/lib/kernel/src/raw_file_io.erl
@@ -0,0 +1,75 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(raw_file_io).
+
+-export([open/2]).
+
+open(Filename, Modes) ->
+    %% Layers are applied in this order, and the listed modules will call this
+    %% function again as necessary. eg. a raw compressed delayed file in list
+    %% mode will walk through [_list -> _compressed -> _delayed -> _raw].
+    ModuleOrder = [{raw_file_io_list, fun match_list/1},
+                   {raw_file_io_compressed, fun match_compressed/1},
+                   {raw_file_io_delayed, fun match_delayed/1},
+                   {raw_file_io_raw, fun match_raw/1}],
+    open_1(ModuleOrder, Filename, add_implicit_modes(Modes)).
+open_1([], _Filename, _Modes) ->
+    error(badarg);
+open_1([{Module, Match} | Rest], Filename, Modes) ->
+    case lists:any(Match, Modes) of
+        true ->
+            {Options, ChildModes} =
+                lists:partition(fun(Mode) -> Match(Mode) end, Modes),
+            Module:open_layer(Filename, ChildModes, Options);
+        false ->
+            open_1(Rest, Filename, Modes)
+    end.
+
+%% 'read' and 'list' mode are enabled unless disabled by another option, so
+%% we'll explicitly add them to avoid duplicating this logic in child layers.
+add_implicit_modes(Modes0) ->
+    Modes1 = add_unless_matched(Modes0, fun match_writable/1, read),
+    add_unless_matched(Modes1, fun match_binary/1, list).
+add_unless_matched(Modes, Match, Default) ->
+    case lists:any(Match, Modes) of
+        false -> [Default | Modes];
+        true -> Modes
+    end.
+
+match_list(list) -> true;
+match_list(_Other) -> false.
+
+match_compressed(compressed) -> true;
+match_compressed(_Other) -> false.
+
+match_delayed({delayed_write, _Size, _Timeout}) -> true;
+match_delayed(delayed_write) -> true;
+match_delayed(_Other) -> false.
+
+match_raw(raw) -> true;
+match_raw(_Other) -> false.
+
+match_writable(write) -> true;
+match_writable(append) -> true;
+match_writable(exclusive) -> true;
+match_writable(_Other) -> false.
+
+match_binary(binary) -> true;
+match_binary(_Other) -> false.
diff --git a/lib/kernel/src/raw_file_io_compressed.erl b/lib/kernel/src/raw_file_io_compressed.erl
new file mode 100644
index 0000000000..d5ab042d25
--- /dev/null
+++ b/lib/kernel/src/raw_file_io_compressed.erl
@@ -0,0 +1,134 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(raw_file_io_compressed).
+
+-export([close/1, sync/1, datasync/1, truncate/1, advise/4, allocate/3,
+         position/2, write/2, pwrite/2, pwrite/3,
+         read_line/1, read/2, pread/2, pread/3]).
+
+%% OTP internal.
+-export([ipread_s32bu_p32bu/3, sendfile/8]).
+
+-export([open_layer/3]).
+
+-include("file_int.hrl").
+
+open_layer(Filename, Modes, Options) ->
+    IsAppend = lists:member(append, Modes),
+    IsDeflate = lists:member(write, Modes),
+    IsInflate = lists:member(read, Modes),
+    if
+        IsDeflate, IsInflate; IsAppend ->
+            {error, einval};
+        IsDeflate, not IsInflate ->
+            start_server_module(raw_file_io_deflate, Filename, Modes, Options);
+        IsInflate ->
+            start_server_module(raw_file_io_inflate, Filename, Modes, Options)
+    end.
+
+start_server_module(Module, Filename, Modes, Options) ->
+    Secret = make_ref(),
+    case gen_statem:start(Module, {self(), Secret, Options}, []) of
+        {ok, Pid} -> open_next_layer(Pid, Secret, Filename, Modes);
+        Other -> Other
+    end.
+
+open_next_layer(Pid, Secret, Filename, Modes) ->
+    case gen_statem:call(Pid, {'$open', Secret, Filename, Modes}, infinity) of
+        ok ->
+            PublicFd = #file_descriptor{
+                module = raw_file_io_compressed, data = {self(), Pid} },
+            {ok, PublicFd};
+        Other -> Other
+    end.
+
+close(Fd) ->
+    wrap_call(Fd, [close]).
+
+sync(Fd) ->
+    wrap_call(Fd, [sync]).
+datasync(Fd) ->
+    wrap_call(Fd, [datasync]).
+
+truncate(Fd) ->
+    wrap_call(Fd, [truncate]).
+
+advise(Fd, Offset, Length, Advise) ->
+    wrap_call(Fd, [advise, Offset, Length, Advise]).
+allocate(Fd, Offset, Length) ->
+    wrap_call(Fd, [allocate, Offset, Length]).
+
+position(Fd, Mark) ->
+    wrap_call(Fd, [position, Mark]).
+
+write(Fd, IOData) ->
+    try
+        CompactedData = erlang:iolist_to_iovec(IOData),
+        wrap_call(Fd, [write, CompactedData])
+    catch
+        error:badarg -> {error, badarg}
+    end.
+
+pwrite(Fd, Offset, IOData) ->
+    try
+        CompactedData = erlang:iolist_to_iovec(IOData),
+        wrap_call(Fd, [pwrite, Offset, CompactedData])
+    catch
+        error:badarg -> {error, badarg}
+    end.
+pwrite(Fd, LocBytes) ->
+    try
+        CompactedLocBytes =
+            [ {Offset, erlang:iolist_to_iovec(IOData)} ||
+              {Offset, IOData} <- LocBytes ],
+        wrap_call(Fd, [pwrite, CompactedLocBytes])
+    catch
+        error:badarg -> {error, badarg}
+    end.
+
+read_line(Fd) ->
+    wrap_call(Fd, [read_line]).
+read(Fd, Size) ->
+    wrap_call(Fd, [read, Size]).
+pread(Fd, Offset, Size) ->
+    wrap_call(Fd, [pread, Offset, Size]).
+pread(Fd, LocNums) ->
+    wrap_call(Fd, [pread, LocNums]).
+
+ipread_s32bu_p32bu(Fd, Offset, MaxSize) ->
+    wrap_call(Fd, [ipread_s32bu_p32bu, Offset, MaxSize]).
+
+sendfile(_,_,_,_,_,_,_,_) ->
+    {error, enotsup}.
+
+wrap_call(Fd, Command) ->
+    {_Owner, Pid} = get_fd_data(Fd),
+    try gen_statem:call(Pid, Command, infinity) of
+        Result -> Result
+    catch
+        exit:{noproc, _StackTrace} -> {error, einval}
+    end.
+
+get_fd_data(#file_descriptor{ data = Data }) ->
+    {Owner, _ServerPid} = Data,
+    case self() of
+        Owner -> Data;
+        _ -> error(not_on_controlling_process)
+    end.
diff --git a/lib/kernel/src/raw_file_io_deflate.erl b/lib/kernel/src/raw_file_io_deflate.erl
new file mode 100644
index 0000000000..acfc546743
--- /dev/null
+++ b/lib/kernel/src/raw_file_io_deflate.erl
@@ -0,0 +1,159 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(raw_file_io_deflate).
+
+-behavior(gen_statem).
+
+-export([init/1, callback_mode/0, terminate/3]).
+-export([opening/3, opened/3]).
+
+-include("file_int.hrl").
+
+-define(GZIP_WBITS, 16 + 15).
+
+callback_mode() -> state_functions.
+
+init({Owner, Secret, [compressed]}) ->
+    Monitor = monitor(process, Owner),
+    Z = zlib:open(),
+    ok = zlib:deflateInit(Z, default, deflated, ?GZIP_WBITS, 8, default),
+    Data =
+        #{ owner => Owner,
+           monitor => Monitor,
+           secret => Secret,
+           position => 0,
+           zlib => Z },
+    {ok, opening, Data}.
+
+opening({call, From}, {'$open', Secret, Filename, Modes}, #{ secret := Secret } = Data) ->
+    case raw_file_io:open(Filename, Modes) of
+        {ok, PrivateFd} ->
+            NewData = Data#{ handle => PrivateFd },
+            {next_state, opened, NewData, [{reply, From, ok}]};
+        Other ->
+            {stop_and_reply, normal, [{reply, From, Other}]}
+    end;
+opening(_Event, _Contents, _Data) ->
+    {keep_state_and_data, [postpone]}.
+
+%%
+
+opened(info, {'DOWN', Monitor, process, _Owner, Reason}, #{ monitor := Monitor } = Data) ->
+    if
+        Reason =/= kill -> flush_deflate_state(Data);
+        Reason =:= kill -> ignored
+    end,
+    {stop, shutdown};
+
+opened(info, _Message, _Data) ->
+    keep_state_and_data;
+
+opened({call, {Owner, _Tag} = From}, [close], #{ owner := Owner } = Data) ->
+    #{ handle := PrivateFd } = Data,
+    Response =
+        case flush_deflate_state(Data) of
+            ok -> ?CALL_FD(PrivateFd, close, []);
+            Other -> Other
+        end,
+    {stop_and_reply, normal, [{reply, From, Response}]};
+
+opened({call, {Owner, _Tag} = From}, [position, Mark], #{ owner := Owner } = Data) ->
+    case position(Data, Mark) of
+        {ok, NewData, Result} ->
+            Response = {ok, Result},
+            {keep_state, NewData, [{reply, From, Response}]};
+        Other ->
+            {keep_state_and_data, [{reply, From, Other}]}
+    end;
+
+opened({call, {Owner, _Tag} = From}, [write, IOVec], #{ owner := Owner } = Data) ->
+    case write(Data, IOVec) of
+        {ok, NewData} -> {keep_state, NewData, [{reply, From, ok}]};
+        Other -> {keep_state_and_data, [{reply, From, Other}]}
+    end;
+
+opened({call, {Owner, _Tag} = From}, [read, _Size], #{ owner := Owner }) ->
+    Response = {error, ebadf},
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened({call, {Owner, _Tag} = From}, [read_line], #{ owner := Owner }) ->
+    Response = {error, ebadf},
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened({call, {Owner, _Tag} = From}, _Command, #{ owner := Owner }) ->
+    Response = {error, enotsup},
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened({call, _From}, _Command, _Data) ->
+    %% The client functions filter this out, so we'll crash if the user does
+    %% anything stupid on purpose.
+    {shutdown, protocol_violation};
+
+opened(_Event, _Request, _Data) ->
+    keep_state_and_data.
+
+write(Data, IOVec) ->
+    #{ handle := PrivateFd, position := Position, zlib := Z } = Data,
+    UncompressedSize = iolist_size(IOVec),
+    case ?CALL_FD(PrivateFd, write, [zlib:deflate(Z, IOVec)]) of
+        ok -> {ok, Data#{ position := (Position + UncompressedSize) }};
+        Other -> Other
+    end.
+
+%%
+%% We support "seeking" forward as long as it isn't relative to EOF.
+%%
+%% Seeking is a bit of a misnomer as it's really just compressing zeroes until
+%% we reach the desired point, but it has always behaved like this.
+%%
+
+position(Data, Mark) when is_atom(Mark) ->
+    position(Data, {Mark, 0});
+position(Data, Offset) when is_integer(Offset) ->
+    position(Data, {bof, Offset});
+position(Data, {bof, Offset}) when is_integer(Offset) ->
+    position_1(Data, Offset);
+position(Data, {cur, Offset}) when is_integer(Offset) ->
+    #{ position := Position } = Data,
+    position_1(Data, Position + Offset);
+position(_Data, {eof, Offset}) when is_integer(Offset) ->
+    {error, einval};
+position(_Data, _Any) ->
+    {error, badarg}.
+
+position_1(#{ position := Desired } = Data, Desired) ->
+    {ok, Data, Desired};
+position_1(#{ position := Current } = Data, Desired) when Current < Desired ->
+    BytesToWrite = min(Desired - Current, 4 bsl 20),
+    case write(Data, <<0:(BytesToWrite)/unit:8>>) of
+        {ok, NewData} -> position_1(NewData, Desired);
+        Other -> Other
+    end;
+position_1(#{ position := Current }, Desired) when Current > Desired ->
+    {error, einval}.
+
+flush_deflate_state(#{ handle := PrivateFd, zlib := Z }) ->
+    case ?CALL_FD(PrivateFd, write, [zlib:deflate(Z, [], finish)]) of
+        ok -> ok;
+        Other -> Other
+    end.
+
+terminate(_Reason, _State, _Data) ->
+    ok.
diff --git a/lib/kernel/src/raw_file_io_delayed.erl b/lib/kernel/src/raw_file_io_delayed.erl
new file mode 100644
index 0000000000..d2ad7550a1
--- /dev/null
+++ b/lib/kernel/src/raw_file_io_delayed.erl
@@ -0,0 +1,320 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(raw_file_io_delayed).
+
+-behavior(gen_statem).
+
+-export([close/1, sync/1, datasync/1, truncate/1, advise/4, allocate/3,
+         position/2, write/2, pwrite/2, pwrite/3,
+         read_line/1, read/2, pread/2, pread/3]).
+
+%% OTP internal.
+-export([ipread_s32bu_p32bu/3, sendfile/8]).
+
+-export([open_layer/3]).
+
+-export([init/1, callback_mode/0, terminate/3]).
+-export([opening/3, opened/3]).
+
+-include("file_int.hrl").
+
+open_layer(Filename, Modes, Options) ->
+    Secret = make_ref(),
+    case gen_statem:start(?MODULE, {self(), Secret, Options}, []) of
+        {ok, Pid} ->
+            gen_statem:call(Pid, {'$open', Secret, Filename, Modes}, infinity);
+        Other ->
+            Other
+    end.
+
+callback_mode() -> state_functions.
+
+init({Owner, Secret, Options}) ->
+    Monitor = monitor(process, Owner),
+    Defaults =
+        #{ owner => Owner,
+           monitor => Monitor,
+           secret => Secret,
+           timer => none,
+           pid => self(),
+           buffer => prim_buffer:new(),
+           delay_size => 64 bsl 10,
+           delay_time => 2000 },
+    Data = fill_delay_values(Defaults, Options),
+    {ok, opening, Data}.
+
+fill_delay_values(Data, []) ->
+    Data;
+fill_delay_values(Data, [{delayed_write, Size, Time} | Options]) ->
+    fill_delay_values(Data#{ delay_size => Size, delay_time => Time }, Options);
+fill_delay_values(Data, [_ | Options]) ->
+    fill_delay_values(Data, Options).
+
+opening({call, From}, {'$open', Secret, Filename, Modes}, #{ secret := Secret } = Data) ->
+    case raw_file_io:open(Filename, Modes) of
+        {ok, PrivateFd} ->
+            PublicData = maps:with([owner, buffer, delay_size, pid], Data),
+            PublicFd = #file_descriptor{ module = ?MODULE, data = PublicData },
+
+            NewData = Data#{ handle => PrivateFd },
+            Response = {ok, PublicFd},
+            {next_state, opened, NewData, [{reply, From, Response}]};
+        Other ->
+            {stop_and_reply, normal, [{reply, From, Other}]}
+    end;
+opening(_Event, _Contents, _Data) ->
+    {keep_state_and_data, [postpone]}.
+
+%%
+
+opened(info, {'$timed_out', Secret}, #{ secret := Secret } = Data) ->
+    %% If the user writes something at this exact moment, the flush will fail
+    %% and the timer won't reset on the next write since the buffer won't be
+    %% empty (Unless we collided on a flush). We therefore reset the timeout to
+    %% ensure that data won't sit idle for extended periods of time.
+    case try_flush_write_buffer(Data) of
+        busy -> gen_statem:cast(self(), '$reset_timeout');
+        ok -> ok
+    end,
+    {keep_state, Data#{ timer => none }, []};
+
+opened(info, {'DOWN', Monitor, process, _Owner, Reason}, #{ monitor := Monitor } = Data) ->
+    if
+        Reason =/= kill -> try_flush_write_buffer(Data);
+        Reason =:= kill -> ignored
+    end,
+    {stop, shutdown};
+
+opened(info, _Message, _Data) ->
+    keep_state_and_data;
+
+opened({call, {Owner, _Tag} = From}, [close], #{ owner := Owner } = Data) ->
+    case flush_write_buffer(Data) of
+        ok ->
+            #{ handle := PrivateFd } = Data,
+            Response = ?CALL_FD(PrivateFd, close, []),
+            {stop_and_reply, normal, [{reply, From, Response}]};
+        Other ->
+            {stop_and_reply, normal, [{reply, From, Other}]}
+    end;
+
+opened({call, {Owner, _Tag} = From}, '$wait', #{ owner := Owner }) ->
+    %% Used in write/2 to synchronize writes on lock conflicts.
+    {keep_state_and_data, [{reply, From, ok}]};
+
+opened({call, {Owner, _Tag} = From}, '$synchronous_flush', #{ owner := Owner } = Data) ->
+    cancel_flush_timeout(Data),
+    Response = flush_write_buffer(Data),
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened({call, {Owner, _Tag} = From}, Command, #{ owner := Owner } = Data) ->
+    Response =
+        case flush_write_buffer(Data) of
+            ok -> dispatch_command(Data, Command);
+            Other -> Other
+        end,
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened({call, _From}, _Command, _Data) ->
+    %% The client functions filter this out, so we'll crash if the user does
+    %% anything stupid on purpose.
+    {shutdown, protocol_violation};
+
+opened(cast, '$reset_timeout', #{ delay_time := Timeout, secret := Secret } = Data) ->
+    cancel_flush_timeout(Data),
+    Timer = erlang:send_after(Timeout, self(), {'$timed_out', Secret}),
+    {keep_state, Data#{ timer => Timer }, []};
+
+opened(cast, _Message, _Data) ->
+    {keep_state_and_data, []}.
+
+dispatch_command(Data, [Function | Args]) ->
+    #{ handle := Handle } = Data,
+    Module = Handle#file_descriptor.module,
+    apply(Module, Function, [Handle | Args]).
+
+cancel_flush_timeout(#{ timer := none }) ->
+    ok;
+cancel_flush_timeout(#{ timer := Timer }) ->
+    _ = erlang:cancel_timer(Timer, [{async, true}]),
+    ok.
+
+try_flush_write_buffer(#{ buffer := Buffer, handle := PrivateFd }) ->
+    case prim_buffer:try_lock(Buffer) of
+        acquired ->
+            flush_write_buffer_1(Buffer, PrivateFd),
+            prim_buffer:unlock(Buffer),
+            ok;
+        busy ->
+            busy
+    end.
+
+%% This is only safe to use when there is no chance of conflict with the owner
+%% process, or in other words, "during synchronous calls outside of the locked
+%% section of write/2"
+flush_write_buffer(#{ buffer := Buffer, handle := PrivateFd }) ->
+    acquired = prim_buffer:try_lock(Buffer),
+    Result = flush_write_buffer_1(Buffer, PrivateFd),
+    prim_buffer:unlock(Buffer),
+    Result.
+
+flush_write_buffer_1(Buffer, PrivateFd) ->
+    case prim_buffer:size(Buffer) of
+        Size when Size > 0 ->
+            ?CALL_FD(PrivateFd, write, [prim_buffer:read_iovec(Buffer, Size)]);
+        0 ->
+            ok
+    end.
+
+terminate(_Reason, _State, _Data) ->
+    ok.
+
+%% Client functions
+
+write(Fd, IOData) ->
+    try
+        enqueue_write(Fd, erlang:iolist_to_iovec(IOData))
+    catch
+        error:badarg -> {error, badarg}
+    end.
+enqueue_write(_Fd, []) ->
+    ok;
+enqueue_write(Fd, IOVec) ->
+    %% get_fd_data will reject everyone except the process that opened the Fd,
+    %% so we can't race with anyone except the wrapper process.
+    #{ delay_size := DelaySize,
+       buffer := Buffer,
+       pid := Pid } = get_fd_data(Fd),
+    case prim_buffer:try_lock(Buffer) of
+        acquired ->
+            %% (The wrapper process will exit without flushing if we're killed
+            %% while holding the lock).
+            enqueue_write_locked(Pid, Buffer, DelaySize, IOVec);
+        busy ->
+            %% This can only happen while we're processing a timeout in the
+            %% wrapper process, so we perform a bogus call to get a completion
+            %% notification before trying again.
+            gen_statem:call(Pid, '$wait'),
+            enqueue_write(Fd, IOVec)
+    end.
+enqueue_write_locked(Pid, Buffer, DelaySize, IOVec) ->
+    %% The synchronous operations (write, forced flush) are safe since we're
+    %% running on the only process that can fill the buffer; a timeout being
+    %% processed just before $synchronous_flush will cause the flush to nop,
+    %% and a timeout sneaking in just before a synchronous write won't do
+    %% anything since the buffer is guaranteed to be empty at that point.
+    BufSize = prim_buffer:size(Buffer),
+    case is_iovec_smaller_than(IOVec, DelaySize - BufSize) of
+        true when BufSize > 0 ->
+            prim_buffer:write(Buffer, IOVec),
+            prim_buffer:unlock(Buffer);
+        true ->
+            prim_buffer:write(Buffer, IOVec),
+            prim_buffer:unlock(Buffer),
+            gen_statem:cast(Pid, '$reset_timeout');
+        false when BufSize > 0 ->
+            prim_buffer:write(Buffer, IOVec),
+            prim_buffer:unlock(Buffer),
+            gen_statem:call(Pid, '$synchronous_flush');
+        false ->
+            prim_buffer:unlock(Buffer),
+            gen_statem:call(Pid, [write, IOVec])
+    end.
+
+%% iolist_size/1 will always look through the entire list to get a precise
+%% amount, which is pretty inefficient since we only need to know whether we've
+%% hit the buffer threshold or not.
+%%
+%% We only handle the binary case since write/2 forcibly translates input to
+%% erlang:iovec().
+is_iovec_smaller_than(IOVec, Max) ->
+    is_iovec_smaller_than_1(IOVec, Max, 0).
+is_iovec_smaller_than_1(_IOVec, Max, Acc) when Acc >= Max ->
+    false;
+is_iovec_smaller_than_1([], _Max, _Acc) ->
+    true;
+is_iovec_smaller_than_1([Binary | Rest], Max, Acc) when is_binary(Binary) ->
+    is_iovec_smaller_than_1(Rest, Max, Acc + byte_size(Binary)).
+
+close(Fd) ->
+    wrap_call(Fd, [close]).
+
+sync(Fd) ->
+    wrap_call(Fd, [sync]).
+datasync(Fd) ->
+    wrap_call(Fd, [datasync]).
+
+truncate(Fd) ->
+    wrap_call(Fd, [truncate]).
+
+advise(Fd, Offset, Length, Advise) ->
+    wrap_call(Fd, [advise, Offset, Length, Advise]).
+allocate(Fd, Offset, Length) ->
+    wrap_call(Fd, [allocate, Offset, Length]).
+
+position(Fd, Mark) ->
+    wrap_call(Fd, [position, Mark]).
+
+pwrite(Fd, Offset, IOData) ->
+    try
+        CompactedData = erlang:iolist_to_iovec(IOData),
+        wrap_call(Fd, [pwrite, Offset, CompactedData])
+    catch
+        error:badarg -> {error, badarg}
+    end.
+pwrite(Fd, LocBytes) ->
+    try
+        CompactedLocBytes =
+            [ {Offset, erlang:iolist_to_iovec(IOData)} ||
+              {Offset, IOData} <- LocBytes ],
+        wrap_call(Fd, [pwrite, CompactedLocBytes])
+    catch
+        error:badarg -> {error, badarg}
+    end.
+
+read_line(Fd) ->
+    wrap_call(Fd, [read_line]).
+read(Fd, Size) ->
+    wrap_call(Fd, [read, Size]).
+pread(Fd, Offset, Size) ->
+    wrap_call(Fd, [pread, Offset, Size]).
+pread(Fd, LocNums) ->
+    wrap_call(Fd, [pread, LocNums]).
+
+ipread_s32bu_p32bu(Fd, Offset, MaxSize) ->
+    wrap_call(Fd, [ipread_s32bu_p32bu, Offset, MaxSize]).
+
+sendfile(_,_,_,_,_,_,_,_) ->
+    {error, enotsup}.
+
+wrap_call(Fd, Command) ->
+    #{ pid := Pid } = get_fd_data(Fd),
+    try gen_statem:call(Pid, Command, infinity) of
+        Result -> Result
+    catch
+        exit:{noproc, _StackTrace} -> {error, einval}
+    end.
+
+get_fd_data(#file_descriptor{ data = Data }) ->
+    #{ owner := Owner } = Data,
+    case self() of
+        Owner -> Data;
+        _ -> error(not_on_controlling_process)
+    end.
diff --git a/lib/kernel/src/raw_file_io_inflate.erl b/lib/kernel/src/raw_file_io_inflate.erl
new file mode 100644
index 0000000000..7e9780310c
--- /dev/null
+++ b/lib/kernel/src/raw_file_io_inflate.erl
@@ -0,0 +1,261 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(raw_file_io_inflate).
+
+-behavior(gen_statem).
+
+-export([init/1, callback_mode/0, terminate/3]).
+-export([opening/3, opened_gzip/3, opened_passthrough/3]).
+
+-include("file_int.hrl").
+
+-define(INFLATE_CHUNK_SIZE, (1 bsl 10)).
+-define(GZIP_WBITS, (16 + 15)).
+
+callback_mode() -> state_functions.
+
+init({Owner, Secret, [compressed]}) ->
+    Monitor = monitor(process, Owner),
+    %% We're using the undocumented inflateInit/3 to open the stream in
+    %% 'reset mode', which resets the inflate state at the end of every stream,
+    %% allowing us to read concatenated gzip files.
+    Z = zlib:open(),
+    ok = zlib:inflateInit(Z, ?GZIP_WBITS, reset),
+    Data =
+        #{ owner => Owner,
+           monitor => Monitor,
+           secret => Secret,
+           position => 0,
+           buffer => prim_buffer:new(),
+           zlib => Z },
+    {ok, opening, Data}.
+
+%% The old driver fell back to plain reads if the file didn't start with the
+%% magic gzip bytes.
+choose_decompression_state(PrivateFd) ->
+    State =
+        case ?CALL_FD(PrivateFd, read, [2]) of
+            {ok, <<16#1F, 16#8B>>} -> opened_gzip;
+            _Other -> opened_passthrough
+        end,
+    {ok, 0} = ?CALL_FD(PrivateFd, position, [0]),
+    State.
+
+opening({call, From}, {'$open', Secret, Filename, Modes}, #{ secret := Secret } = Data) ->
+    case raw_file_io:open(Filename, Modes) of
+        {ok, PrivateFd} ->
+            NextState = choose_decompression_state(PrivateFd),
+            NewData = Data#{ handle => PrivateFd },
+            {next_state, NextState, NewData, [{reply, From, ok}]};
+        Other ->
+            {stop_and_reply, normal, [{reply, From, Other}]}
+    end;
+opening(_Event, _Contents, _Data) ->
+    {keep_state_and_data, [postpone]}.
+
+internal_close(From, Data) ->
+    #{ handle := PrivateFd } = Data,
+    Response = ?CALL_FD(PrivateFd, close, []),
+    {stop_and_reply, normal, [{reply, From, Response}]}.
+
+opened_passthrough(info, {'DOWN', Monitor, process, _Owner, _Reason}, #{ monitor := Monitor }) ->
+    {stop, shutdown};
+
+opened_passthrough(info, _Message, _Data) ->
+    keep_state_and_data;
+
+opened_passthrough({call, {Owner, _Tag} = From}, [close], #{ owner := Owner } = Data) ->
+    internal_close(From, Data);
+
+opened_passthrough({call, {Owner, _Tag} = From}, [Method | Args], #{ owner := Owner } = Data) ->
+    #{ handle := PrivateFd } = Data,
+    Response = ?CALL_FD(PrivateFd, Method, Args),
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened_passthrough({call, _From}, _Command, _Data) ->
+    %% The client functions filter this out, so we'll crash if the user does
+    %% anything stupid on purpose.
+    {shutdown, protocol_violation};
+
+opened_passthrough(_Event, _Request, _Data) ->
+    keep_state_and_data.
+
+%%
+
+opened_gzip(info, {'DOWN', Monitor, process, _Owner, _Reason}, #{ monitor := Monitor }) ->
+    {stop, shutdown};
+
+opened_gzip(info, _Message, _Data) ->
+    keep_state_and_data;
+
+opened_gzip({call, {Owner, _Tag} = From}, [close], #{ owner := Owner } = Data) ->
+    internal_close(From, Data);
+
+opened_gzip({call, {Owner, _Tag} = From}, [position, Mark], #{ owner := Owner } = Data) ->
+    case position(Data, Mark) of
+        {ok, NewData, Result} ->
+            Response = {ok, Result},
+            {keep_state, NewData, [{reply, From, Response}]};
+        Other ->
+            {keep_state_and_data, [{reply, From, Other}]}
+    end;
+
+opened_gzip({call, {Owner, _Tag} = From}, [read, Size], #{ owner := Owner } = Data) ->
+    case read(Data, Size) of
+        {ok, NewData, Result} ->
+            Response = {ok, Result},
+            {keep_state, NewData, [{reply, From, Response}]};
+        Other ->
+            {keep_state_and_data, [{reply, From, Other}]}
+    end;
+
+opened_gzip({call, {Owner, _Tag} = From}, [read_line], #{ owner := Owner } = Data) ->
+    case read_line(Data) of
+        {ok, NewData, Result} ->
+            Response = {ok, Result},
+            {keep_state, NewData, [{reply, From, Response}]};
+        Other ->
+            {keep_state_and_data, [{reply, From, Other}]}
+    end;
+
+opened_gzip({call, {Owner, _Tag} = From}, [write, _IOData], #{ owner := Owner }) ->
+    Response = {error, ebadf},
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened_gzip({call, {Owner, _Tag} = From}, _Request, #{ owner := Owner }) ->
+    Response = {error, enotsup},
+    {keep_state_and_data, [{reply, From, Response}]};
+
+opened_gzip({call, _From}, _Request, _Data) ->
+    %% The client functions filter this out, so we'll crash if the user does
+    %% anything stupid on purpose.
+    {shutdown, protocol_violation};
+
+opened_gzip(_Event, _Request, _Data) ->
+    keep_state_and_data.
+
+%%
+
+read(#{ buffer := Buffer } = Data, Size) ->
+    try read_1(Data, Buffer, prim_buffer:size(Buffer), Size) of
+        Result -> Result
+    catch
+        error:badarg -> {error, badarg};
+        error:_ -> {error, eio}
+    end.
+read_1(Data, Buffer, BufferSize, ReadSize) when BufferSize >= ReadSize ->
+    #{ position := Position } = Data,
+    Decompressed = prim_buffer:read(Buffer, ReadSize),
+    {ok, Data#{ position => (Position + ReadSize) }, Decompressed};
+read_1(Data, Buffer, BufferSize, ReadSize) when BufferSize < ReadSize ->
+    #{ handle := PrivateFd } = Data,
+    case ?CALL_FD(PrivateFd, read, [?INFLATE_CHUNK_SIZE]) of
+        {ok, Compressed} ->
+            #{ zlib := Z } = Data,
+            Uncompressed = erlang:iolist_to_iovec(zlib:inflate(Z, Compressed)),
+            prim_buffer:write(Buffer, Uncompressed),
+            read_1(Data, Buffer, prim_buffer:size(Buffer), ReadSize);
+        eof when BufferSize > 0 ->
+            read_1(Data, Buffer, BufferSize, BufferSize);
+        Other ->
+            Other
+    end.
+
+read_line(#{ buffer := Buffer } = Data) ->
+    try read_line_1(Data, Buffer, prim_buffer:find_byte_index(Buffer, $\n)) of
+        {ok, NewData, Decompressed} -> {ok, NewData, Decompressed};
+        Other -> Other
+    catch
+        error:badarg -> {error, badarg};
+        error:_ -> {error, eio}
+    end.
+
+read_line_1(Data, Buffer, not_found) ->
+    #{ handle := PrivateFd, zlib := Z } = Data,
+    case ?CALL_FD(PrivateFd, read, [?INFLATE_CHUNK_SIZE]) of
+        {ok, Compressed} ->
+            Uncompressed = erlang:iolist_to_iovec(zlib:inflate(Z, Compressed)),
+            prim_buffer:write(Buffer, Uncompressed),
+            read_line_1(Data, Buffer, prim_buffer:find_byte_index(Buffer, $\n));
+        eof ->
+            case prim_buffer:size(Buffer) of
+                Size when Size > 0 -> {ok, prim_buffer:read(Buffer, Size)};
+                Size when Size =:= 0 -> eof
+            end;
+        Error ->
+            Error
+    end;
+read_line_1(Data, Buffer, {ok, LFIndex}) ->
+    %% Translate CRLF into just LF, completely ignoring which encoding is used,
+    %% but treat the file position as including CR.
+    #{ position := Position } = Data,
+    NewData = Data#{ position => (Position + LFIndex + 1) },
+    CRIndex = (LFIndex - 1),
+    TranslatedLine =
+        case prim_buffer:read(Buffer, LFIndex + 1) of
+            <<Line:CRIndex/binary, "\r\n">> -> <<Line/binary, "\n">>;
+            Line -> Line
+        end,
+    {ok, NewData, TranslatedLine}.
+
+%%
+%% We support seeking in both directions as long as it isn't relative to EOF.
+%%
+%% Seeking backwards is extremely inefficient since we have to seek to the very
+%% beginning and then decompress up to the desired point.
+%%
+
+position(Data, Mark) when is_atom(Mark) ->
+    position(Data, {Mark, 0});
+position(Data, Offset) when is_integer(Offset) ->
+    position(Data, {bof, Offset});
+position(Data, {bof, Offset}) when is_integer(Offset) ->
+    position_1(Data, Offset);
+position(Data, {cur, Offset}) when is_integer(Offset) ->
+    #{ position := Position } = Data,
+    position_1(Data, Position + Offset);
+position(_Data, {eof, Offset}) when is_integer(Offset) ->
+    {error, einval};
+position(_Data, _Other) ->
+    {error, badarg}.
+
+position_1(_Data, Desired) when Desired < 0 ->
+    {error, einval};
+position_1(#{ position := Desired } = Data, Desired) ->
+    {ok, Data, Desired};
+position_1(#{ position := Current } = Data, Desired) when Current < Desired ->
+    case read(Data, min(Desired - Current, ?INFLATE_CHUNK_SIZE)) of
+        {ok, NewData, _Data} -> position_1(NewData, Desired);
+        eof -> {ok, Data, Current};
+        Other -> Other
+    end;
+position_1(#{ position := Current } = Data, Desired) when Current > Desired ->
+    #{ handle := PrivateFd, buffer := Buffer, zlib := Z } = Data,
+    case ?CALL_FD(PrivateFd, position, [bof]) of
+        {ok, 0} ->
+            ok = zlib:inflateReset(Z),
+            prim_buffer:wipe(Buffer),
+            position_1(Data#{ position => 0 }, Desired);
+        Other ->
+            Other
+    end.
+
+terminate(_Reason, _State, _Data) ->
+    ok.
diff --git a/lib/kernel/src/raw_file_io_list.erl b/lib/kernel/src/raw_file_io_list.erl
new file mode 100644
index 0000000000..2e16e63f0e
--- /dev/null
+++ b/lib/kernel/src/raw_file_io_list.erl
@@ -0,0 +1,128 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(raw_file_io_list).
+
+-export([close/1, sync/1, datasync/1, truncate/1, advise/4, allocate/3,
+         position/2, write/2, pwrite/2, pwrite/3,
+         read_line/1, read/2, pread/2, pread/3]).
+
+%% OTP internal.
+-export([ipread_s32bu_p32bu/3, sendfile/8]).
+
+-export([open_layer/3]).
+
+-include("file_int.hrl").
+
+open_layer(Filename, Modes, [list]) ->
+    case raw_file_io:open(Filename, [binary | Modes]) of
+        {ok, PrivateFd} -> {ok, make_public_fd(PrivateFd, Modes)};
+        Other -> Other
+    end.
+
+%% We can skip wrapping the file if it's write-only since only read operations
+%% are affected by list mode. Since raw_file_io fills in all implicit options
+%% for us, all we need to do is check whether 'read' is among them.
+make_public_fd(PrivateFd, Modes) ->
+    case lists:member(read, Modes) of
+        true -> #file_descriptor{ module = ?MODULE, data = PrivateFd };
+        false -> PrivateFd
+    end.
+
+close(Fd) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, close, []).
+
+sync(Fd) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, sync, []).
+datasync(Fd) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, datasync, []).
+
+truncate(Fd) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, truncate, []).
+
+advise(Fd, Offset, Length, Advise) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, advise, [Offset, Length, Advise]).
+allocate(Fd, Offset, Length) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, allocate, [Offset, Length]).
+
+position(Fd, Mark) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, position, [Mark]).
+
+write(Fd, IOData) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, write, [IOData]).
+
+pwrite(Fd, Offset, IOData) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, pwrite, [Offset, IOData]).
+pwrite(Fd, LocBytes) ->
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, pwrite, [LocBytes]).
+
+read_line(Fd) ->
+    PrivateFd = Fd#file_descriptor.data,
+    case ?CALL_FD(PrivateFd, read_line, []) of
+        {ok, Binary} -> {ok, binary_to_list(Binary)};
+        Other -> Other
+    end.
+read(Fd, Size) ->
+    PrivateFd = Fd#file_descriptor.data,
+    case ?CALL_FD(PrivateFd, read, [Size]) of
+        {ok, Binary} -> {ok, binary_to_list(Binary)};
+        Other -> Other
+    end.
+pread(Fd, Offset, Size) ->
+    PrivateFd = Fd#file_descriptor.data,
+    case ?CALL_FD(PrivateFd, pread, [Offset, Size]) of
+        {ok, Binary} -> {ok, binary_to_list(Binary)};
+        Other -> Other
+    end.
+pread(Fd, LocNums) ->
+    PrivateFd = Fd#file_descriptor.data,
+    case ?CALL_FD(PrivateFd, pread, [LocNums]) of
+        {ok, LocResults} ->
+            TranslatedResults =
+                [ case Result of
+                      Result when is_binary(Result) -> binary_to_list(Result);
+                      eof -> eof
+                  end || Result <- LocResults ],
+            {ok, TranslatedResults};
+        Other -> Other
+    end.
+
+ipread_s32bu_p32bu(Fd, Offset, MaxSize) ->
+    PrivateFd = Fd#file_descriptor.data,
+    case ?CALL_FD(PrivateFd, ipread_s32bu_p32bu, [Offset, MaxSize]) of
+        {ok, {Size, Pointer, Binary}} when is_binary(Binary) ->
+            {ok, {Size, Pointer, binary_to_list(Binary)}};
+        Other ->
+            Other
+    end.
+
+sendfile(Fd, Dest, Offset, Bytes, ChunkSize, Headers, Trailers, Flags) ->
+    Args = [Dest, Offset, Bytes, ChunkSize, Headers, Trailers, Flags],
+    PrivateFd = Fd#file_descriptor.data,
+    ?CALL_FD(PrivateFd, sendfile, Args).
diff --git a/lib/kernel/src/raw_file_io_raw.erl b/lib/kernel/src/raw_file_io_raw.erl
new file mode 100644
index 0000000000..9a9fe78eb1
--- /dev/null
+++ b/lib/kernel/src/raw_file_io_raw.erl
@@ -0,0 +1,25 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(raw_file_io_raw).
+
+-export([open_layer/3]).
+
+open_layer(Filename, Modes, [raw]) ->
+    prim_file:open(Filename, [raw | Modes]).
diff --git a/lib/kernel/src/rpc.erl b/lib/kernel/src/rpc.erl
index 0e0b7dffa3..d197de942f 100644
--- a/lib/kernel/src/rpc.erl
+++ b/lib/kernel/src/rpc.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -418,10 +418,7 @@ abcast(Name, Mess) ->
 
 abcast([Node|Tail], Name, Mess) ->
     Dest = {Name,Node},
-    case catch erlang:send(Dest, Mess, [noconnect]) of
-	noconnect -> spawn(erlang, send, [Dest,Mess]), ok;
-	_ -> ok
-    end,
+    try erlang:send(Dest, Mess) catch error:_ -> ok end,
     abcast(Tail, Name, Mess);
 abcast([], _,_) -> abcast.
 
@@ -498,7 +495,7 @@ start_monitor(Node, Name) ->
       Module :: module(),
       Function :: atom(),
       Args :: [term()],
-      ResL :: [term()],
+      ResL :: [Res :: term() | {'badrpc', Reason :: term()}],
       BadNodes :: [node()].
 
 multicall(M, F, A) -> 
@@ -509,14 +506,14 @@ multicall(M, F, A) ->
                   Module :: module(),
                   Function :: atom(),
                   Args :: [term()],
-                  ResL :: [term()],
+                  ResL :: [Res :: term() | {'badrpc', Reason :: term()}],
                   BadNodes :: [node()];
                (Module, Function, Args, Timeout) -> {ResL, BadNodes} when
                   Module :: module(),
                   Function :: atom(),
                   Args :: [term()],
                   Timeout :: timeout(),
-                  ResL :: [term()],
+                  ResL :: [Res :: term() | {'badrpc', Reason :: term()}],
                   BadNodes :: [node()].
 
 multicall(Nodes, M, F, A) when is_list(Nodes) ->
@@ -531,7 +528,7 @@ multicall(M, F, A, Timeout) ->
       Function :: atom(),
       Args :: [term()],
       Timeout :: timeout(),
-      ResL :: [term()],
+      ResL :: [Res :: term() | {'badrpc', Reason :: term()}],
       BadNodes :: [node()].
 
 multicall(Nodes, M, F, A, infinity)
diff --git a/lib/kernel/src/seq_trace.erl b/lib/kernel/src/seq_trace.erl
index cc0c10909b..8d7aba0f27 100644
--- a/lib/kernel/src/seq_trace.erl
+++ b/lib/kernel/src/seq_trace.erl
@@ -41,7 +41,7 @@
 
 -type flag()       :: 'send' | 'receive' | 'print' | 'timestamp' | 'monotonic_timestamp' | 'strict_monotonic_timestamp'.
 -type component()  :: 'label' | 'serial' | flag().
--type value()      :: (Integer :: non_neg_integer())
+-type value()      :: (Label :: term())
                     | {Previous :: non_neg_integer(),
                        Current :: non_neg_integer()}
                     | (Bool :: boolean()).
@@ -59,10 +59,6 @@ set_token({Flags,Label,Serial,_From,Lastcnt}) ->
     F = decode_flags(Flags),
     set_token2([{label,Label},{serial,{Lastcnt, Serial}} | F]).
 
-%% We limit the label type to always be a small integer because erl_interface
-%% expects that, the BIF can however "unofficially" handle atoms as well, and
-%% atoms can be used if only Erlang nodes are involved
-
 -spec set_token(Component, Val) -> {Component, OldVal} when
       Component :: component(),
       Val :: value(),
diff --git a/lib/kernel/src/user.erl b/lib/kernel/src/user.erl
index a5cc7b0ec1..872e63ab53 100644
--- a/lib/kernel/src/user.erl
+++ b/lib/kernel/src/user.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -398,7 +398,7 @@ get_line(Prompt, Port, Q, Acc, Enc) ->
 		    get_line_bytes(Prompt, Port, Q, Acc, Bytes, Enc);
 		{Port, eof} ->
 		    put(eof, true),
-		    {ok, eof, []};
+		    {ok, eof, queue:new()};
                 {io_request,From,ReplyAs,{get_geometry,_}=Req} when is_pid(From) ->
                     do_io_request(Req, From, ReplyAs, Port, 
                                   queue:new()), 
@@ -615,7 +615,7 @@ get_chars(Prompt, M, F, Xa, Port, Q, State, Enc) ->
 		    get_chars_bytes(State, M, F, Xa, Port, Q, Bytes, Enc);
 		{Port, eof} ->
 		    put(eof, true),
-		    {ok, eof, []};
+		    {ok, eof, queue:new()};
 		%%{io_request,From,ReplyAs,Request} when is_pid(From) ->
 		%%    get_chars_req(Prompt, M, F, Xa, Port, queue:new(), State,
 		%%		  Request, From, ReplyAs);
diff --git a/lib/kernel/test/code_SUITE.erl b/lib/kernel/test/code_SUITE.erl
index 569753155f..902196def2 100644
--- a/lib/kernel/test/code_SUITE.erl
+++ b/lib/kernel/test/code_SUITE.erl
@@ -931,37 +931,34 @@ purge_stacktrace(Config) when is_list(Config) ->
     code:purge(code_b_test),
     try code_b_test:call(fun(b) -> ok end, a)
     catch
-	error:function_clause ->
+	error:function_clause:Stacktrace ->
 	    code:load_file(code_b_test),
-	    case erlang:get_stacktrace() of
+	    case Stacktrace of
 		      [{?MODULE,_,[a],_},
 		       {code_b_test,call,2,_},
 		       {?MODULE,purge_stacktrace,1,_}|_] ->
-			  false = code:purge(code_b_test),
-			  [] = erlang:get_stacktrace()
+			  false = code:purge(code_b_test)
 		  end
     end,
     try code_b_test:call(nofun, 2)
     catch
-	error:function_clause ->
+	error:function_clause:Stacktrace2 ->
 	    code:load_file(code_b_test),
-	    case erlang:get_stacktrace() of
+	    case Stacktrace2 of
 		      [{code_b_test,call,[nofun,2],_},
 		       {?MODULE,purge_stacktrace,1,_}|_] ->
-			  false = code:purge(code_b_test),
-			  [] = erlang:get_stacktrace()
+			  false = code:purge(code_b_test)
 		  end
     end,
     Args = [erlang,error,[badarg]],
     try code_b_test:call(erlang, error, [badarg,Args])
     catch
-	error:badarg ->
+	error:badarg:Stacktrace3 ->
 	    code:load_file(code_b_test),
-	    case erlang:get_stacktrace() of
+	    case Stacktrace3 of
 		      [{code_b_test,call,Args,_},
 		       {?MODULE,purge_stacktrace,1,_}|_] ->
-			  false = code:purge(code_b_test),
-			  [] = erlang:get_stacktrace()
+			  false = code:purge(code_b_test)
 		  end
     end,
     ok.
diff --git a/lib/kernel/test/disk_log_SUITE.erl b/lib/kernel/test/disk_log_SUITE.erl
index fe2fc778f2..0709a6e766 100644
--- a/lib/kernel/test/disk_log_SUITE.erl
+++ b/lib/kernel/test/disk_log_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -89,8 +89,6 @@
 	 dist_terminate/1, dist_accessible/1, dist_deadlock/1,
          dist_open2/1, other_groups/1,
 
-         evil/1,
-
          otp_6278/1, otp_10131/1]).
 
 -export([head_fun/1, hf/0, lserv/1, 
@@ -123,7 +121,7 @@
 	[halt_int, wrap_int, halt_ext, wrap_ext, read_mode, head,
 	 notif, new_idx_vsn, reopen, block, unblock, open, close,
 	 error, chunk, truncate, many_users, info, change_size,
-	 change_attribute, distribution, evil, otp_6278, otp_10131]).
+	 change_attribute, distribution, otp_6278, otp_10131]).
 
 %% These test cases should be skipped if the VxWorks card is 
 %% configured without NFS cache.
@@ -149,7 +147,7 @@ all() ->
      {group, open}, {group, close}, {group, error}, chunk,
      truncate, many_users, {group, info},
      {group, change_size}, change_attribute,
-     {group, distribution}, evil, otp_6278, otp_10131].
+     {group, distribution}, otp_6278, otp_10131].
 
 groups() -> 
     [{halt_int, [], [halt_int_inf, {group, halt_int_sz}]},
@@ -4676,119 +4674,6 @@ other_groups(Conf) when is_list(Conf) ->
 
     ok.
 
--define(MAX, ?MAX_FWRITE_CACHE). % as in disk_log_1.erl
-%% Evil cases such as closed file descriptor port.
-evil(Conf) when is_list(Conf) ->
-    Dir = ?privdir(Conf),
-    File = filename:join(Dir, "n.LOG"),
-    Log = n,
-
-    %% Not a very thorough test.
-
-    ok = setup_evil_filled_cache_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:log(Log, apa),
-    ok = disk_log:close(Log),
-
-    ok = setup_evil_filled_cache_halt(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:truncate(Log, apa),
-    ok = stop_evil(Log),
-
-    %% White box test. 
-    file:delete(File),
-    Ports0 = erlang:ports(),
-    {ok, Log} = disk_log:open([{name,Log},{file,File},{type,halt},
-                                     {size,?MAX+50},{format,external}]),
-    [Fd] = erlang:ports() -- Ports0,
-    {B,_} = x_mk_bytes(30),
-    ok = disk_log:blog(Log, <<0:(?MAX-1)/unit:8>>),
-    exit(Fd, kill),
-    {error, {file_error,_,einval}} = disk_log:blog_terms(Log, [B,B]),
-    ok= disk_log:close(Log),
-    file:delete(File),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:close(Log),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:log(Log, apa),
-    ok = stop_evil(Log),
-
-    ok = setup_evil_halt(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:log(Log, apa),
-    ok = stop_evil(Log),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:reopen(Log, apa),
-    {error, {file_error,_,einval}} = disk_log:reopen(Log, apa),
-    ok = stop_evil(Log),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:reopen(Log, apa),
-    ok = stop_evil(Log),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:inc_wrap_file(Log),
-    ok = stop_evil(Log),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:chunk(Log, start),
-    ok = stop_evil(Log),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:truncate(Log),
-    ok = stop_evil(Log),
-
-    ok = setup_evil_wrap(Log, Dir),
-    {error, {file_error,_,einval}} = disk_log:chunk_step(Log, start, 1),
-    ok = stop_evil(Log),
-
-    io:format("messages: ~p~n", [erlang:process_info(self(), messages)]),
-    del(File, 2),
-    file:delete(File),
-    ok.
-
-setup_evil_wrap(Log, Dir) ->
-    setup_evil(Log, [{type,wrap},{size,{100,2}}], Dir).
-
-setup_evil_halt(Log, Dir) ->
-    setup_evil(Log, [{type,halt},{size,10000}], Dir).
-
-setup_evil(Log, Args, Dir) ->
-    File = filename:join(Dir, lists:concat([Log, ".LOG"])),
-    file:delete(File),
-    del(File, 2),
-    ok = disk_log:start(),
-    Ports0 = erlang:ports(),
-    {ok, Log} = disk_log:open([{name,Log},{file,File} | Args]),
-    [Fd] = erlang:ports() -- Ports0,
-    exit(Fd, kill),
-    ok = disk_log:log_terms(n, [<<0:10/unit:8>>]),
-    timer:sleep(2500), % TIMEOUT in disk_log_1.erl is 2000
-    ok.
-
-stop_evil(Log) ->
-    {error, _} = disk_log:close(Log),
-    ok.
-
-setup_evil_filled_cache_wrap(Log, Dir) ->
-    setup_evil_filled_cache(Log, [{type,wrap},{size,{?MAX,2}}], Dir).
-
-setup_evil_filled_cache_halt(Log, Dir) ->
-    setup_evil_filled_cache(Log, [{type,halt},{size,infinity}], Dir).
-
-%% The cache is filled, and the file descriptor port gone.
-setup_evil_filled_cache(Log, Args, Dir) ->
-    File = filename:join(Dir, lists:concat([Log, ".LOG"])),
-    file:delete(File),
-    del(File, 2),
-    ok = disk_log:start(),
-    Ports0 = erlang:ports(),
-    {ok, Log} = disk_log:open([{name,Log},{file,File} | Args]),
-    [Fd] = erlang:ports() -- Ports0,
-    ok = disk_log:log_terms(n, [<<0:?MAX/unit:8>>]),
-    exit(Fd, kill),
-    ok.
-
 %% OTP-6278. open/1 creates no status or crash report.
 otp_6278(Conf) when is_list(Conf) ->
     Dir = ?privdir(Conf),
diff --git a/lib/kernel/test/erl_distribution_SUITE.erl b/lib/kernel/test/erl_distribution_SUITE.erl
index bbfaa9d147..0470f09f29 100644
--- a/lib/kernel/test/erl_distribution_SUITE.erl
+++ b/lib/kernel/test/erl_distribution_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -95,7 +95,11 @@ init_per_group(_GroupName, Config) ->
 end_per_group(_GroupName, Config) ->
     Config.
 
-
+init_per_testcase(TC, Config) when TC == hostnames;
+                                   TC == nodenames ->
+    file:make_dir("hostnames_nodedir"),
+    file:write_file("hostnames_nodedir/ignore_core_files",""),
+    Config;
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Config.
 
@@ -251,7 +255,7 @@ test_node(Name, Illigal) ->
         end,
     net_kernel:monitor_nodes(true),
     BinCommand = unicode:characters_to_binary(Command, utf8),
-    Prt = open_port({spawn, BinCommand}, [stream]),
+    Prt = open_port({spawn, BinCommand}, [stream,{cd,"hostnames_nodedir"}]),
     Node = list_to_atom(Name),
     receive
         {nodeup, Node} ->
@@ -459,9 +463,9 @@ run_remote_test([FuncStr, TestNodeStr | Args]) ->
 		1
 	end
     catch
-	C:E ->
+	C:E:S ->
 	    io:format("Node ~p got EXCEPTION ~p:~p\nat ~p\n",
-		      [node(), C, E, erlang:get_stacktrace()]),
+		      [node(), C, E, S]),
 	    2
     end,
     io:format("Node ~p doing halt(~p).\n",[node(), Status]),
@@ -1140,17 +1144,16 @@ monitor_nodes_otp_6481_test(Config, TestType) when is_list(Config) ->
     TestMonNodeState = monitor_node_state(),
     %% io:format("~p~n", [TestMonNodeState]),
     TestMonNodeState =
-	MonNodeState
+	case TestType of
+	    nodedown -> [];
+	    nodeup -> [{self(), []}]
+	end
+	++ lists:map(fun (_) -> {MN, []} end, Seq)
 	++ case TestType of
 	       nodedown -> [{self(), []}];
 	       nodeup -> []
 	   end
-	++ lists:map(fun (_) -> {MN, []} end, Seq)
-	++ case TestType of
-	       nodedown -> [];
-	       nodeup -> [{self(), []}]
-	   end,
-
+	++ MonNodeState,
 
     {ok, Node} = start_node(Name, "", this),
     receive {nodeup, Node} -> ok end,
diff --git a/lib/kernel/test/erl_distribution_wb_SUITE.erl b/lib/kernel/test/erl_distribution_wb_SUITE.erl
index 03aaee56b7..8256444bdc 100644
--- a/lib/kernel/test/erl_distribution_wb_SUITE.erl
+++ b/lib/kernel/test/erl_distribution_wb_SUITE.erl
@@ -61,10 +61,13 @@
 %% From R9 and forward extended references is compulsory
 %% From R10 and forward extended pids and ports are compulsory
 %% From R20 and forward UTF8 atoms are compulsory
+%% From R21 and forward NEW_FUN_TAGS is compulsory (no more tuple fallback {fun, ...})
 -define(COMPULSORY_DFLAGS, (?DFLAG_EXTENDED_REFERENCES bor
                             ?DFLAG_EXTENDED_PIDS_PORTS bor
-                            ?DFLAG_UTF8_ATOMS)).
+                            ?DFLAG_UTF8_ATOMS bor
+                            ?DFLAG_NEW_FUN_TAGS)).
 
+-define(PASS_THROUGH, $p).
 
 -define(shutdown(X), exit(X)).
 -define(int16(X), [((X) bsr 8) band 16#ff, (X) band 16#ff]).
@@ -674,15 +677,16 @@ build_rex_message(Cookie,OurName) ->
 %% Receive a distribution message    
 recv_message(Socket) ->
     case gen_tcp:recv(Socket, 0) of
+        {ok,[]} ->
+            recv_message(Socket);  %% a tick, ignore
 	{ok,Data} ->
 	    B0 = list_to_binary(Data),
-	    {_,B1} = erlang:split_binary(B0,1),
-	    Header = binary_to_term(B1),
-	    Siz = byte_size(term_to_binary(Header)),
-	    {_,B2} = erlang:split_binary(B1,Siz),
+	    <<?PASS_THROUGH, B1/binary>> = B0,
+	    {Header,Siz} = binary_to_term(B1,[used]),
+	    <<_:Siz/binary,B2/binary>> = B1,
 	    Message = case (catch binary_to_term(B2)) of
 			  {'EXIT', _} ->
-			      could_not_digest_message;
+			      {could_not_digest_message,B2};
 			  Other ->
 			      Other
 		      end,
diff --git a/lib/kernel/test/erl_prim_loader_SUITE.erl b/lib/kernel/test/erl_prim_loader_SUITE.erl
index b6417210b9..3502a4ad08 100644
--- a/lib/kernel/test/erl_prim_loader_SUITE.erl
+++ b/lib/kernel/test/erl_prim_loader_SUITE.erl
@@ -33,6 +33,7 @@
 	 primary_archive/1, virtual_dir_in_archive/1,
 	 get_modules/1]).
 
+-define(PRIM_FILE, prim_file).
 
 %%-----------------------------------------------------------------
 %% Test suite for erl_prim_loader. (Most code is run during system start/stop.)
@@ -461,7 +462,7 @@ primary_archive(Config) when is_list(Config) ->
     %% Set primary archive 
     ExpectedEbins = [Archive, DictDir ++ "/ebin", DummyDir ++ "/ebin"],
     io:format("ExpectedEbins: ~p\n", [ExpectedEbins]),
-    {ok, FileInfo} = prim_file:read_file_info(Archive),
+    {ok, FileInfo} = ?PRIM_FILE:read_file_info(Archive),
     {ok, Ebins} = rpc:call(Node, erl_prim_loader, set_primary_archive,
 			   [Archive, ArchiveBin, FileInfo,
 			    fun escript:parse_file/1]),
diff --git a/lib/kernel/test/file_SUITE.erl b/lib/kernel/test/file_SUITE.erl
index 119e1f24bb..ff93f25e25 100644
--- a/lib/kernel/test/file_SUITE.erl
+++ b/lib/kernel/test/file_SUITE.erl
@@ -39,6 +39,8 @@
 -define(FILE_FIN_PER_TESTCASE(Config), Config).
 -endif.
 
+-define(PRIM_FILE, prim_file).
+
 -module(?FILE_SUITE).
 
 -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
@@ -54,7 +56,8 @@
 	  open1/1,
 	  old_modes/1, new_modes/1, path_open/1, open_errors/1]).
 -export([ file_info_basic_file/1, file_info_basic_directory/1,
-	  file_info_bad/1, file_info_times/1, file_write_file_info/1]).
+	  file_info_bad/1, file_info_times/1, file_write_file_info/1,
+          file_wfi_helpers/1]).
 -export([rename/1, access/1, truncate/1, datasync/1, sync/1,
 	 read_write/1, pread_write/1, append/1, exclusive/1]).
 -export([ e_delete/1, e_rename/1, e_make_dir/1, e_del_dir/1]).
@@ -97,6 +100,12 @@
 
 -export([unicode_mode/1]).
 
+-export([volume_relative_paths/1]).
+
+-export([tiny_writes/1, tiny_writes_delayed/1,
+         large_writes/1, large_writes_delayed/1,
+         tiny_reads/1, tiny_reads_ahead/1]).
+
 %% Debug exports
 -export([create_file_slow/2, create_file/2, create_bin/2]).
 -export([verify_file/2, verify_bin/3]).
@@ -107,6 +116,8 @@
 -export([disc_free/1, memsize/0]).
 
 -include_lib("common_test/include/ct.hrl").
+-include_lib("common_test/include/ct_event.hrl").
+
 -include_lib("kernel/include/file.hrl").
 
 -define(THROW_ERROR(RES), throw({fail, ?LINE, RES})).
@@ -118,13 +129,13 @@ suite() ->
 
 all() -> 
     [unicode, altname, read_write_file, {group, dirs},
-     {group, files}, delete, rename, names, {group, errors},
-     {group, compression}, {group, links}, copy,
+     {group, files}, delete, rename, names, volume_relative_paths,
+     {group, errors}, {group, compression}, {group, links}, copy,
      delayed_write, read_ahead, segment_read, segment_write,
      ipread, pid2name, interleaved_read_write, otp_5814, otp_10852,
      large_file, large_write, read_line_1, read_line_2, read_line_3,
      read_line_4, standard_io, old_io_protocol,
-     unicode_mode
+     unicode_mode, {group, bench}
     ].
 
 groups() -> 
@@ -142,7 +153,8 @@ groups() ->
      {pos, [], [pos1, pos2, pos3]},
      {file_info, [],
       [file_info_basic_file, file_info_basic_directory,
-       file_info_bad, file_info_times, file_write_file_info]},
+       file_info_bad, file_info_times, file_write_file_info,
+       file_wfi_helpers]},
      {consult, [], [consult1, path_consult]},
      {eval, [], [eval1, path_eval]},
      {script, [], [script1, path_script]},
@@ -154,11 +166,19 @@ groups() ->
        write_compressed, compress_errors, catenated_gzips,
        compress_async_crash]},
      {links, [],
-      [make_link, read_link_info_for_non_link, symlinks]}].
+      [make_link, read_link_info_for_non_link, symlinks]},
+     {bench, [],
+      [tiny_writes, tiny_writes_delayed,
+       large_writes, large_writes_delayed,
+       tiny_reads, tiny_reads_ahead]}].
 
 init_per_group(_GroupName, Config) ->
     Config.
 
+end_per_group(bench, Config) ->
+    ScratchDir = proplists:get_value(priv_dir, Config),
+    file:delete(filename:join(ScratchDir, "benchmark_scratch_file")),
+    Config;
 end_per_group(_GroupName, Config) ->
     Config.
 
@@ -381,11 +401,11 @@ read_write_0(Str, {Func, ReadFun}, Options) ->
 	    io:format("~p:~p: ~p ERROR: ~ts vs~n             ~w~n  - ~p~n",
 		      [?MODULE, Line, Func, Str, ReadBytes, Options]),
 	    exit({error, ?LINE});
-	  error:What ->
+	  error:What:Stacktrace ->
 	    io:format("~p:??: ~p ERROR: ~p from~n  ~w~n  ~p~n",
 		      [?MODULE, Func, What, Str, Options]),
 
-	    io:format("\t~p~n", [erlang:get_stacktrace()]),
+	    io:format("\t~p~n", [Stacktrace]),
 	    exit({error, ?LINE})
     end.
 
@@ -473,7 +493,7 @@ um_check_unicode(_Utf8Bin, {ok, _ListOrBin}, _, _UTF8_) ->
 um_filename(Bin, Dir, Options) when is_binary(Bin) ->
     um_filename(binary_to_list(Bin), Dir, Options);
 um_filename(Str = [_|_], Dir, Options) ->
-    Name = hd(string:tokens(Str, ":")),
+    Name = hd(string:lexemes(Str, ":")),
     Enc = atom_to_list(proplists:get_value(encoding, Options, latin1)),
     File = case lists:member(binary, Options) of
 	       true ->
@@ -638,6 +658,10 @@ cur_dir_0(Config) when is_list(Config) ->
 	    {ok,NewDirFiles} = ?FILE_MODULE:list_dir("."),
 	    true = lists:member(UncommonName,NewDirFiles),
 
+	    %% Ensure that we get the same result with a trailing slash; the
+	    %% APIs used on Windows will choke on them if passed directly.
+	    {ok,NewDirFiles} = ?FILE_MODULE:list_dir("./"),
+
 	    %% Delete the directory and return to the old current directory
 	    %% and check that the created file isn't there (too!)
 	    expect({error, einval}, {error, eacces}, 
@@ -690,10 +714,15 @@ win_cur_dir_1(_Config) ->
     %% Get the drive letter from the current directory,
     %% and try to get current directory for that drive.
 
-    [Drive,$:|_] = BaseDir,
-    {ok,BaseDir} = ?FILE_MODULE:get_cwd([Drive,$:]),
+    [CurDrive,$:|_] = BaseDir,
+    {ok,BaseDir} = ?FILE_MODULE:get_cwd([CurDrive,$:]),
     io:format("BaseDir = ~s\n", [BaseDir]),
 
+    %% We should error out on non-existent drives. Any reasonable system will
+    %% have at least one.
+    CurDirs = [?FILE_MODULE:get_cwd([Drive,$:]) || Drive <- lists:seq($A, $Z)],
+    lists:member({error,eaccess}, CurDirs),
+
     %% Unfortunately, there is no way to move away from the
     %% current drive as we can't use the "subst" command from
     %% a SSH connection. We can't test any more.
@@ -831,7 +860,7 @@ no_untranslatable_names() ->
     end.
 
 start_node(Name, Args) ->
-    [_,Host] = string:tokens(atom_to_list(node()), "@"),
+    [_,Host] = string:lexemes(atom_to_list(node()), "@"),
     ct:log("Trying to start ~w@~s~n", [Name,Host]),
     case test_server:start_node(Name, peer, [{args,Args}]) of
 	{error,Reason} ->
@@ -1019,6 +1048,23 @@ close(Config) when is_list(Config) ->
     Val = ?FILE_MODULE:close(Fd1),
     io:format("Second close gave: ~p",[Val]),
 
+    %% All operations on a closed raw file should EINVAL, even if they're not
+    %% supported on the current platform.
+    {ok,Fd2} = ?FILE_MODULE:open(Name, [read, write, raw]),
+    ok = ?FILE_MODULE:close(Fd2),
+
+    {error, einval} = ?FILE_MODULE:advise(Fd2, 5, 5, normal),
+    {error, einval} = ?FILE_MODULE:allocate(Fd2, 5, 5),
+    {error, einval} = ?FILE_MODULE:close(Fd2),
+    {error, einval} = ?FILE_MODULE:datasync(Fd2),
+    {error, einval} = ?FILE_MODULE:position(Fd2, 5),
+    {error, einval} = ?FILE_MODULE:pread(Fd2, 5, 1),
+    {error, einval} = ?FILE_MODULE:pwrite(Fd2, 5, "einval please"),
+    {error, einval} = ?FILE_MODULE:read(Fd2, 1),
+    {error, einval} = ?FILE_MODULE:sync(Fd2),
+    {error, einval} = ?FILE_MODULE:truncate(Fd2),
+    {error, einval} = ?FILE_MODULE:write(Fd2, "einval please"),
+
     [] = flush(),
     ok.
 
@@ -1132,8 +1178,8 @@ pread_write_test(File, Data) ->
 	   end,
     I = Size + 17,
     ok = ?FILE_MODULE:pwrite(File, 0, Data),
-    Res = ?FILE_MODULE:pread(File, 0, I),
-    {ok, Data} = Res,
+    {ok, Data} = ?FILE_MODULE:pread(File, 0, I),
+    {ok, [Data]} = ?FILE_MODULE:pread(File, [{0, I}]),
     eof = ?FILE_MODULE:pread(File, I, 1),
     ok = ?FILE_MODULE:pwrite(File, [{0, Data}, {I, Data}]),
     {ok, [Data, eof, Data]} =
@@ -1564,6 +1610,39 @@ file_write_file_info(Config) when is_list(Config) ->
     [] = flush(),
     ok.
 
+file_wfi_helpers(Config) when is_list(Config) ->
+    RootDir = get_good_directory(Config),
+    io:format("RootDir = ~p", [RootDir]),
+
+    Name = filename:join(RootDir,
+                         atom_to_list(?MODULE) ++ "_wfi_helpers"),
+
+    ok = ?FILE_MODULE:write_file(Name, "hello again"),
+    NewTime = {{1997, 02, 15}, {13, 18, 20}},
+    ok = ?FILE_MODULE:change_time(Name, NewTime, NewTime),
+
+    {ok, #file_info{atime=NewActAtime, mtime=NewTime}} =
+        ?FILE_MODULE:read_file_info(Name),
+
+    NewFilteredAtime = filter_atime(NewTime, Config),
+    NewFilteredAtime = filter_atime(NewActAtime, Config),
+
+    %% Make the file unwritable
+    ok = ?FILE_MODULE:change_mode(Name, 8#400),
+    {error, eacces} = ?FILE_MODULE:write_file(Name, "hello again"),
+
+    %% ... and writable again
+    ok = ?FILE_MODULE:change_mode(Name, 8#600),
+    ok = ?FILE_MODULE:write_file(Name, "hello again"),
+
+    %% We have no idea which users will work, so all we can do is to check
+    %% that it returns enoent instead of crashing.
+    {error, enoent} = ?FILE_MODULE:change_group("bogus file name", 0),
+    {error, enoent} = ?FILE_MODULE:change_owner("bogus file name", 0),
+
+    [] = flush(),
+    ok.
+
 %% Returns a directory on a file system that has correct file times.
 
 get_good_directory(Config) ->
@@ -2044,13 +2123,22 @@ names(Config) when is_list(Config) ->
     ok = ?FILE_MODULE:close(Fd2),
     {ok,Fd3} = ?FILE_MODULE:open(Name3,read),
     ok = ?FILE_MODULE:close(Fd3),
+
+    %% Now try the same on raw files.
+    {ok,Fd4} = ?FILE_MODULE:open(Name2, [read, raw]),
+    ok = ?FILE_MODULE:close(Fd4),
+    {ok,Fd4f} = ?FILE_MODULE:open(lists:flatten(Name2), [read, raw]),
+    ok = ?FILE_MODULE:close(Fd4f),
+    {ok,Fd5} = ?FILE_MODULE:open(Name3, [read, raw]),
+    ok = ?FILE_MODULE:close(Fd5),
+
     case length(Name1) > 255 of
 	true ->
 	    io:format("Path too long for an atom:\n\n~p\n", [Name1]);
 	false ->
 	    Name4 = list_to_atom(Name1),
-	    {ok,Fd4} = ?FILE_MODULE:open(Name4,read),
-	    ok = ?FILE_MODULE:close(Fd4)
+	    {ok,Fd6} = ?FILE_MODULE:open(Name4,read),
+	    ok = ?FILE_MODULE:close(Fd6)
     end,
 
     %% Try some path names
@@ -2074,6 +2162,22 @@ names(Config) when is_list(Config) ->
     [] = flush(),
     ok.
 
+volume_relative_paths(Config) when is_list(Config) ->
+    case os:type() of
+        {win32, _} ->
+            {ok, [Drive, $: | _]} = file:get_cwd(),
+            %% Relative to current device root.
+            {ok, RootInfo} = file:read_file_info([Drive, $:, $/]),
+            {ok, RootInfo} = file:read_file_info("/"),
+            %% Relative to current device directory.
+            {ok, DirContents} = file:list_dir([Drive, $:]),
+            {ok, DirContents} = file:list_dir("."),
+            [] = flush(),
+            ok;
+        _ ->
+            {skip, "This test is Windows-specific."}
+    end.
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 
@@ -2108,7 +2212,7 @@ e_delete(Config) when is_list(Config) ->
 	       Base, #file_info {mode=0}),
 	    {error, eacces} = ?FILE_MODULE:delete(Afile),
 	    ?FILE_MODULE:write_file_info(
-	       Base, #file_info {mode=8#600})
+	       Base, #file_info {mode=8#700})
     end,
 
     [] = flush(),
@@ -2239,7 +2343,7 @@ e_make_dir(Config) when is_list(Config) ->
 	    ?FILE_MODULE:write_file_info(Base, #file_info {mode=0}),
 	    {error, eacces} = ?FILE_MODULE:make_dir(filename:join(Base, "xxxx")),
 	    ?FILE_MODULE:write_file_info(
-	       Base, #file_info {mode=8#600})
+	       Base, #file_info {mode=8#700})
     end,
     ok.
 
@@ -2285,7 +2389,7 @@ e_del_dir(Config) when is_list(Config) ->
 	    ok = ?FILE_MODULE:make_dir(ADirectory),
 	    ?FILE_MODULE:write_file_info( Base, #file_info {mode=0}),
 	    {error, eacces} = ?FILE_MODULE:del_dir(ADirectory),
-	    ?FILE_MODULE:write_file_info( Base, #file_info {mode=8#600})
+	    ?FILE_MODULE:write_file_info( Base, #file_info {mode=8#700})
     end,
     [] = flush(),
     ok.
@@ -2641,8 +2745,8 @@ altname(Config) when is_list(Config) ->
 		{skipped, "Altname not supported on this platform"};
 	    {ok, "LONGAL~1"} -> 
 		{ok, "A_FILE~1"} = ?FILE_MODULE:altname(Name),
-		{ok, "C:/"} = ?FILE_MODULE:altname("C:/"),
-		{ok, "C:\\"} = ?FILE_MODULE:altname("C:\\"),
+		{ok, "c:/"} = ?FILE_MODULE:altname("C:/"),
+		{ok, "c:/"} = ?FILE_MODULE:altname("C:\\"),
 		{error,enoent} = ?FILE_MODULE:altname(NonexName),
 		{ok, "short"} = ?FILE_MODULE:altname(ShortName),
 		ok
@@ -2923,20 +3027,22 @@ delayed_write(Config) when is_list(Config) ->
     %%
     %% Test caching and normal close of non-raw file
     {ok, Fd1} = 
-	?FILE_MODULE:open(File, [write, {delayed_write, Size+1, 2000}]),
+	?FILE_MODULE:open(File, [write, {delayed_write, Size+1, 400}]),
     ok = ?FILE_MODULE:write(Fd1, Data1),
-    timer:sleep(1000), % Just in case the file system is slow
+    %% Wait for a reasonable amount of time to check whether the write was
+    %% practically instantaneous or actually delayed.
+    timer:sleep(100),
     {ok, Fd2} = ?FILE_MODULE:open(File, [read]),
     eof = ?FILE_MODULE:read(Fd2, 1),
     ok = ?FILE_MODULE:write(Fd1, Data1), % Data flush on size
-    timer:sleep(1000), % Just in case the file system is slow
+    timer:sleep(100),
     {ok, Data1Data1} = ?FILE_MODULE:pread(Fd2, bof, 2*Size+1),
     ok = ?FILE_MODULE:write(Fd1, Data1),
-    timer:sleep(3000), % Wait until data flush on timeout
+    timer:sleep(500), % Wait until data flush on timeout
     {ok, Data1Data1Data1} = ?FILE_MODULE:pread(Fd2, bof, 3*Size+1),
     ok = ?FILE_MODULE:write(Fd1, Data1),
     ok = ?FILE_MODULE:close(Fd1), % Data flush on close
-    timer:sleep(1000), % Just in case the file system is slow
+    timer:sleep(100),
     {ok, Data1Data1Data1Data1} = ?FILE_MODULE:pread(Fd2, bof, 4*Size+1),
     ok = ?FILE_MODULE:close(Fd2),
     %%
@@ -2970,7 +3076,7 @@ delayed_write(Config) when is_list(Config) ->
         {'DOWN', Mref1, _, _, _} = Down1a ->
             ct:fail(Down1a)
     end,
-    timer:sleep(1000), % Just in case the file system is slow
+    timer:sleep(100), % Just in case the file system is slow
     {ok, Fd3} = ?FILE_MODULE:open(File, [read]),
     eof = ?FILE_MODULE:read(Fd3, 1),
     Child1 ! {Parent, continue, normal},
@@ -2980,7 +3086,7 @@ delayed_write(Config) when is_list(Config) ->
         {'DOWN', Mref1, _, _, _} = Down1b ->
             ct:fail(Down1b)
     end,
-    timer:sleep(1000), % Just in case the file system is slow
+    timer:sleep(100), % Just in case the file system is slow
     {ok, Data1} = ?FILE_MODULE:pread(Fd3, bof, Size+1),
     ok = ?FILE_MODULE:close(Fd3),
     %%
@@ -2993,7 +3099,7 @@ delayed_write(Config) when is_list(Config) ->
         {'DOWN', Mref2, _, _, _} = Down2a ->
             ct:fail(Down2a)
     end,
-    timer:sleep(1000), % Just in case the file system is slow
+    timer:sleep(100), % Just in case the file system is slow
     {ok, Fd4} = ?FILE_MODULE:open(File, [read]),
     eof = ?FILE_MODULE:read(Fd4, 1),
     Child2 ! {Parent, continue, kill},
@@ -3003,7 +3109,7 @@ delayed_write(Config) when is_list(Config) ->
         {'DOWN', Mref2, _, _, _} = Down2b ->
             ct:fail(Down2b)
     end,
-    timer:sleep(1000), % Just in case the file system is slow
+    timer:sleep(100), % Just in case the file system is slow
     eof = ?FILE_MODULE:pread(Fd4, bof, 1),
     ok  = ?FILE_MODULE:close(Fd4),
     %%
@@ -3095,6 +3201,16 @@ read_ahead(Config) when is_list(Config) ->
     Data1Data2Data3 = Data1++Data2++Data3,
     {ok, Data1Data2Data3} = ?FILE_MODULE:read(Fd5, 3*Size+1),
     ok = ?FILE_MODULE:close(Fd5),
+
+    %% Ensure that a read that draws from both the buffer and the file won't
+    %% return anything wonky.
+    SplitData = << <<(I rem 256)>> || I <- lists:seq(1, 1024) >>,
+    file:write_file(File, SplitData),
+    {ok, Fd6} = ?FILE_MODULE:open(File, [raw, read, binary, {read_ahead, 256}]),
+    {ok, <<1>>} = file:read(Fd6, 1),
+    <<1, Shifted:512/binary, _Rest/binary>> = SplitData,
+    {ok, Shifted} = file:read(Fd6, 512),
+
     %%
     [] = flush(),
     ok.
@@ -3699,6 +3815,83 @@ do_large_write(Name) ->
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+%% Benchmarks
+%%
+%% Note that we only measure the time it takes to run the isolated file
+%% operations and that the actual test runtime can differ significantly,
+%% especially on the write side as the files need to be truncated before
+%% writing.
+
+large_writes(Config) when is_list(Config) ->
+    Modes = [raw, binary],
+    OpCount = 4096,
+    Data = <<0:(64 bsl 10)/unit:8>>,
+    run_write_benchmark(Config, Modes, OpCount, Data).
+
+large_writes_delayed(Config) when is_list(Config) ->
+    %% Each write is exactly as large as the delay buffer, causing the writes
+    %% to pass through each time, giving us a decent idea of how much overhead
+    %% delayed_write adds.
+    Modes = [raw, binary, {delayed_write, 64 bsl 10, 2000}],
+    OpCount = 4096,
+    Data = <<0:(64 bsl 10)/unit:8>>,
+    run_write_benchmark(Config, Modes, OpCount, Data).
+
+tiny_writes(Config) when is_list(Config) ->
+    Modes = [raw, binary],
+    OpCount = 512 bsl 10,
+    Data = <<0>>,
+    run_write_benchmark(Config, Modes, OpCount, Data).
+
+tiny_writes_delayed(Config) when is_list(Config) ->
+    Modes = [raw, binary, {delayed_write, 512 bsl 10, 2000}],
+    OpCount = 512 bsl 10,
+    Data = <<0>>,
+    run_write_benchmark(Config, Modes, OpCount, Data).
+
+%% The read benchmarks assume that "benchmark_scratch_file" has been filled by
+%% the write benchmarks.
+
+tiny_reads(Config) when is_list(Config) ->
+    Modes = [raw, binary],
+    OpCount = 512 bsl 10,
+    run_read_benchmark(Config, Modes, OpCount, 1).
+
+tiny_reads_ahead(Config) when is_list(Config) ->
+    Modes = [raw, binary, {read_ahead, 512 bsl 10}],
+    OpCount = 512 bsl 10,
+    run_read_benchmark(Config, Modes, OpCount, 1).
+
+run_write_benchmark(Config, Modes, OpCount, Data) ->
+    run_benchmark(Config, [write | Modes], OpCount, fun file:write/2, Data).
+
+run_read_benchmark(Config, Modes, OpCount, OpSize) ->
+    run_benchmark(Config, [read | Modes], OpCount, fun file:read/2, OpSize).
+
+run_benchmark(Config, Modes, OpCount, Fun, Arg) ->
+    ScratchDir = proplists:get_value(priv_dir, Config),
+    Path = filename:join(ScratchDir, "benchmark_scratch_file"),
+    {ok, Fd} = file:open(Path, Modes),
+    submit_throughput_results(Fun, [Fd, Arg], OpCount).
+
+submit_throughput_results(Fun, Args, Times) ->
+    MSecs = measure_repeated_file_op(Fun, Args, Times, millisecond),
+    IOPS = trunc(Times * (1000 / MSecs)),
+    ct_event:notify(#event{ name = benchmark_data, data = [{value,IOPS}] }),
+    {comment, io_lib:format("~p IOPS, ~p ms", [IOPS, trunc(MSecs)])}.
+
+measure_repeated_file_op(Fun, Args, Times, Unit) ->
+    Start = os:perf_counter(Unit),
+    repeated_apply(Fun, Args, Times),
+    os:perf_counter(Unit) - Start.
+
+repeated_apply(_F, _Args, Times) when Times =< 0 ->
+    ok;
+repeated_apply(F, Args, Times) ->
+    erlang:apply(F, Args),
+    repeated_apply(F, Args, Times - 1).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 
 response_analysis(Module, Function, Arguments) ->
@@ -3934,7 +4127,7 @@ read_line_create_files(TestData) ->
 read_line_remove_files(TestData) ->
     [ file:delete(File) || {_Function,File,_,_} <- TestData ].
 
-%% read_line with prim_file.
+%% read_line with ?PRIM_FILE.
 read_line_1(Config) when is_list(Config) ->
     PrivDir = proplists:get_value(priv_dir, Config),
     All = read_line_testdata(PrivDir),
@@ -4103,9 +4296,9 @@ read_line_create7(Filename) ->
     file:close(F).
 
 read_line_all(Filename) ->
-    {ok,F} = prim_file:open(Filename,[read,binary]),
+    {ok,F} = ?PRIM_FILE:open(Filename,[read,binary]),
     X=read_rl_lines(F),
-    prim_file:close(F),
+    ?PRIM_FILE:close(F),
     Bin = list_to_binary([B || {ok,B} <- X]),
     Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
 		     "\r\n","\n",[global,{return,binary}]),
@@ -4138,7 +4331,7 @@ read_line_all4(Filename) ->
     {length(X),Bin}.
 
 read_rl_lines(F) ->
-    case prim_file:read_line(F) of
+    case ?PRIM_FILE:read_line(F) of
 	eof ->
 	    [];
 	{error,X} ->
@@ -4158,9 +4351,9 @@ read_rl_lines2(F) ->
     end.
 
 read_line_all_alternating(Filename) ->
-    {ok,F} = prim_file:open(Filename,[read,binary]),
+    {ok,F} = ?PRIM_FILE:open(Filename,[read,binary]),
     X=read_rl_lines(F,true),
-    prim_file:close(F),
+    ?PRIM_FILE:close(F),
     Bin = list_to_binary([B || {ok,B} <- X]),
     Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
 		     "\r\n","\n",[global,{return,binary}]),
@@ -4194,8 +4387,8 @@ read_line_all_alternating4(Filename) ->
 read_rl_lines(F,Alternate) ->
     case begin
 	     case Alternate of
-		 true -> prim_file:read(F,1);
-		 false -> prim_file:read_line(F)
+		 true -> ?PRIM_FILE:read(F,1);
+		 false -> ?PRIM_FILE:read_line(F)
 	     end 
 	 end of
 	eof ->
diff --git a/lib/kernel/test/file_name_SUITE.erl b/lib/kernel/test/file_name_SUITE.erl
index f23529fec9..3afc647081 100644
--- a/lib/kernel/test/file_name_SUITE.erl
+++ b/lib/kernel/test/file_name_SUITE.erl
@@ -77,6 +77,7 @@
 	 init_per_testcase/2, end_per_testcase/2]).
 -export([normal/1,icky/1,very_icky/1,normalize/1,home_dir/1]).
 
+-define(PRIM_FILE, prim_file).
 
 init_per_testcase(_Func, Config) ->
     Config.
@@ -131,7 +132,7 @@ home_dir(Config) when is_list(Config) ->
 					     os:putenv("HOME",NewHome),
 					     {"HOME",Save};
 					 _ ->
-					     rm_rf(prim_file,NewHome),
+					     rm_rf(?PRIM_FILE,NewHome),
 					     throw(unsupported_os)
 				     end,
 	try
@@ -145,7 +146,7 @@ home_dir(Config) when is_list(Config) ->
 		_ ->
 		    os:putenv(SaveOldName,SaveOldValue)
 	    end,
-	    rm_rf(prim_file,NewHome)
+	    rm_rf(?PRIM_FILE,NewHome)
 	end
     catch
 	throw:need_unicode_mode ->
@@ -190,7 +191,7 @@ normal(Config) when is_list(Config) ->
     try
 	Priv = proplists:get_value(priv_dir, Config),
 	file:set_cwd(Priv),
-	ok = check_normal(prim_file),
+	ok = check_normal(?PRIM_FILE),
 	ok = check_normal(file),
 	%% If all is good, delete dir again (avoid hanging dir on windows)
 	rm_rf(file,"normal_dir"),
@@ -210,7 +211,7 @@ icky(Config) when is_list(Config) ->
 	    try
 		Priv = proplists:get_value(priv_dir, Config),
 		file:set_cwd(Priv),
-		ok = check_icky(prim_file),
+		ok = check_icky(?PRIM_FILE),
 		ok = check_icky(file),
 		%% If all is good, delete dir again (avoid hanging dir on windows)
 		rm_rf(file,"icky_dir"),
@@ -229,7 +230,7 @@ very_icky(Config) when is_list(Config) ->
 	    try
 		Priv = proplists:get_value(priv_dir, Config),
 		file:set_cwd(Priv),
-		case check_very_icky(prim_file) of
+		case check_very_icky(?PRIM_FILE) of
 		    need_unicode_mode ->
 			{skipped,"VM needs to be started in Unicode filename mode"};
 		    ok ->
@@ -292,11 +293,6 @@ check_normal(Mod) ->
 		ok
 	end,
 	[ begin
-	      {ok, FD} = Mod:open(Name,[read]),
-	      {ok, Content} = Mod:read(FD,1024),
-	      ok = file:close(FD)
-	  end || {regular,Name,Content} <- NormalDir ],
-	[ begin
 	      {ok, FD} = Mod:open(Name,[read,binary]),
 	      BC = list_to_binary(Content),
 	      {ok, BC} = Mod:read(FD,1024),
@@ -412,11 +408,6 @@ check_icky(Mod) ->
 		ok
 	end,
 	[ begin
-	      {ok, FD} = Mod:open(Name,[read]),
-	      {ok, Content} = Mod:read(FD,1024),
-	      ok = file:close(FD)
-	  end || {regular,Name,Content} <- IckyDir ],
-	[ begin
 	      {ok, FD} = Mod:open(Name,[read,binary]),
 	      BC = list_to_binary([Content]),
 	      {ok, BC} = Mod:read(FD,1024),
@@ -521,11 +512,6 @@ check_very_icky(Mod) ->
 		ok
 	end,
 	[ begin
-	      {ok, FD} = Mod:open(Name,[read]),
-	      {ok, Content} = Mod:read(FD,1024),
-	      ok = file:close(FD)
-	  end || {regular,Name,Content} <- VeryIckyDir ],
-	[ begin
 	      {ok, FD} = Mod:open(Name,[read,binary]),
 	      BC = list_to_binary([Content]),
 	      {ok, BC} = Mod:read(FD,1024),
diff --git a/lib/kernel/test/gen_sctp_SUITE.erl b/lib/kernel/test/gen_sctp_SUITE.erl
index 620ab235a0..9dde00652c 100644
--- a/lib/kernel/test/gen_sctp_SUITE.erl
+++ b/lib/kernel/test/gen_sctp_SUITE.erl
@@ -1038,8 +1038,7 @@ do_from_other_process(Fun) ->
 			  Result ->
 			      Parent ! {Ref,Result}
 		      catch
-			  Class:Reason ->
-			      Stacktrace = erlang:get_stacktrace(),
+			  Class:Reason:Stacktrace ->
 			      Parent ! {Ref,Class,Reason,Stacktrace}
 		      end
 	      end),
@@ -1617,8 +1616,7 @@ s_start(Socket, Timeout, Parent) ->
     try
 	s_loop(Socket, Timeout, Parent, Handler, gb_trees:empty())
     catch
-	Class:Reason ->
-	    Stacktrace = erlang:get_stacktrace(),
+	Class:Reason:Stacktrace ->
 	    io:format(?MODULE_STRING":socket exception ~w:~w at~n"
 		      "~p.~n", [Class,Reason,Stacktrace]),
 	    erlang:raise(Class, Reason, Stacktrace)
diff --git a/lib/kernel/test/gen_tcp_api_SUITE.erl b/lib/kernel/test/gen_tcp_api_SUITE.erl
index 12d22519ce..0fe44e8a88 100644
--- a/lib/kernel/test/gen_tcp_api_SUITE.erl
+++ b/lib/kernel/test/gen_tcp_api_SUITE.erl
@@ -605,9 +605,9 @@ ok({ok,V}) -> V;
 ok(NotOk) ->
     try throw(not_ok)
     catch
-	Thrown ->
+	throw:Thrown:Stacktrace ->
 	    erlang:raise(
-	      error, {Thrown, NotOk}, tl(erlang:get_stacktrace()))
+	      error, {Thrown, NotOk}, tl(Stacktrace))
     end.
 
 get_localaddr() ->
diff --git a/lib/kernel/test/gen_tcp_misc_SUITE.erl b/lib/kernel/test/gen_tcp_misc_SUITE.erl
index 331864b5de..e47023d201 100644
--- a/lib/kernel/test/gen_tcp_misc_SUITE.erl
+++ b/lib/kernel/test/gen_tcp_misc_SUITE.erl
@@ -1572,52 +1572,56 @@ fill_sendq(Config) when is_list(Config) ->
     Master = self(),
     Server =
 	spawn_link(fun () ->
-			   {ok,L} = gen_tcp:listen
-				      (0, [{active,false},binary,
-					   {reuseaddr,true},{packet,0}]),
+			   {ok,L} = gen_tcp:listen(0, [{active,false},binary,
+                                                       {reuseaddr,true},{packet,0}]),
 			   {ok,Port} = inet:port(L),
 			   Master ! {self(),client,
 				     fill_sendq_client(Port, Master)},
 			   fill_sendq_srv(L, Master)
 		   end),
     io:format("~p Server~n", [Server]),
-    receive {Server,client,Client} ->
-		  io:format("~p Client~n", [Client]),
-		  receive {Server,reader,Reader} ->
-				io:format("~p Reader~n", [Reader]),
-				fill_sendq_loop(Server, Client, Reader)
+    receive
+        {Server,client,Client} ->
+            io:format("~p Client~n", [Client]),
+            receive
+                {Server,reader,Reader} ->
+                    io:format("~p Reader~n", [Reader]),
+                    fill_sendq_loop(Server, Client, Reader)
 	    end
     end.
 
 fill_sendq_loop(Server, Client, Reader) ->
     %% Master
     %%
-    receive {Server,send} ->
+    receive
+        {Server,send} ->
 	    fill_sendq_loop(Server, Client, Reader)
     after 2000 ->
 	    %% Send queue full, sender blocked -> close client.
 	    io:format("Send timeout, closing Client...~n", []),
 	    Client ! {self(),close},
-	    receive {Server,[{error,closed}]} ->
-			  io:format("Got server closed.~n"),
-			  receive {Reader,[{error,closed}]} ->
-					io:format
-						("Got reader closed.~n"),
-					ok
-				after 3000 ->
-					ct:fail({timeout,{closed,reader}})
-				end;
-			  {Reader,[{error,closed}]} ->
-			  io:format("Got reader closed.~n"),
-			  receive {Server,[{error,closed}]} ->
-					io:format("Got server closed~n"),
-					ok
-				after 3000 ->
-					ct:fail({timeout,{closed,server}})
-				end
-		  after 3000 ->
-			  ct:fail({timeout,{closed,[server,reader]}})
-		  end
+	    receive
+                {Server,[{error,closed}]} ->
+                    io:format("Got server closed.~n"),
+                    receive
+                        {Reader,[{error,closed}]} ->
+                            io:format("Got reader closed.~n"),
+                            ok
+                    after 3000 ->
+                            ct:fail({timeout,{closed,reader}})
+                    end;
+                {Reader,[{error,closed}]} ->
+                    io:format("Got reader closed.~n"),
+                    receive
+                        {Server,[{error,closed}]} ->
+                            io:format("Got server closed~n"),
+                            ok
+                    after 3000 ->
+                            ct:fail({timeout,{closed,server}})
+                    end
+            after 3000 ->
+                    ct:fail({timeout,{closed,[server,reader]}})
+            end
     end.
 
 fill_sendq_srv(L, Master) ->
diff --git a/lib/kernel/test/gen_udp_SUITE.erl b/lib/kernel/test/gen_udp_SUITE.erl
index 96e495505a..6a50239c2a 100644
--- a/lib/kernel/test/gen_udp_SUITE.erl
+++ b/lib/kernel/test/gen_udp_SUITE.erl
@@ -755,9 +755,9 @@ ok({ok,V}) -> V;
 ok(NotOk) ->
     try throw(not_ok)
     catch
-	Thrown ->
+	throw:Thrown:Stacktrace ->
 	    erlang:raise(
-	      error, {Thrown, NotOk}, tl(erlang:get_stacktrace()))
+	      error, {Thrown, NotOk}, tl(Stacktrace))
     end.
 
 
diff --git a/lib/kernel/test/global_SUITE.erl b/lib/kernel/test/global_SUITE.erl
index 0a7f73c344..0e7b7adc47 100644
--- a/lib/kernel/test/global_SUITE.erl
+++ b/lib/kernel/test/global_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -3470,8 +3470,8 @@ start_procs(Parent, N1, N2, N3, Config) ->
     Pid6 = rpc:call(N3, ?MODULE, start_proc3, [test4]),
     assert_pid(Pid6),
     yes = global:register_name(test1, Pid3),
-    yes = global:register_name(test2, Pid4, {global, notify_all_name}),
-    yes = global:register_name(test3, Pid5, {global, random_notify_name}),
+    yes = global:register_name(test2, Pid4, fun global:notify_all_name/3),
+    yes = global:register_name(test3, Pid5, fun global:random_notify_name/3),
     Resolve = fun(Name, Pid1, Pid2) ->
 		      Parent ! {resolve_called, Name, node()},
 		      {Min, Max} = minmax(Pid1, Pid2),
@@ -3546,7 +3546,7 @@ start_proc_basic(Name) ->
     end.
 
 init_proc_basic(Parent, Name) ->
-    X = global:register_name(Name, self(), {?MODULE, fix_basic_name}),
+    X = global:register_name(Name, self(), fun ?MODULE:fix_basic_name/3),
     Parent ! {self(),X},
     loop().
 
@@ -3791,15 +3791,6 @@ stop() ->
 			  test_server:stop_node(Node)
 		  end, nodes()).
 
-dbg_logs(Name) -> dbg_logs(Name, ?NODES).
-
-dbg_logs(Name, Nodes) ->
-    lists:foreach(fun(N) ->
-			  F = lists:concat([Name, ".log.", N, ".txt"]),
-			  ok = sys:log_to_file({global_name_server, N}, F)
-		  end, Nodes).
-
-
 %% Tests that locally loaded nodes do not loose contact with other nodes.
 global_lost_nodes(Config) when is_list(Config) ->
     Timeout = 60,
diff --git a/lib/kernel/test/inet_SUITE.erl b/lib/kernel/test/inet_SUITE.erl
index 3b502be8b8..2e5f8c7d2c 100644
--- a/lib/kernel/test/inet_SUITE.erl
+++ b/lib/kernel/test/inet_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -40,7 +40,8 @@
 	 lookup_bad_search_option/1,
 	 getif/1,
 	 getif_ifr_name_overflow/1,getservbyname_overflow/1, getifaddrs/1,
-	 parse_strict_address/1, simple_netns/1, simple_netns_open/1,
+	 parse_strict_address/1, ipv4_mapped_ipv6_address/1,
+         simple_netns/1, simple_netns_open/1,
          simple_bind_to_device/1, simple_bind_to_device_open/1]).
 
 -export([get_hosts/1, get_ipv6_hosts/1, parse_hosts/1, parse_address/1,
@@ -667,6 +668,26 @@ parse_strict_address(Config) when is_list(Config) ->
     {ok, {3089,3106,23603,50240,0,0,119,136}} =
 	inet:parse_strict_address("c11:0c22:5c33:c440::077:0088").
 
+ipv4_mapped_ipv6_address(Config) when is_list(Config) ->
+    {D1,D2,D3,D4} = IPv4Address =
+        {rand:uniform(256) - 1,
+         rand:uniform(256) - 1,
+         rand:uniform(256) - 1,
+         rand:uniform(256) - 1},
+    E7 = (D1 bsl 8) bor D2,
+    E8 = (D3 bsl 8) bor D4,
+    io:format("IPv4Address: ~p.~n", [IPv4Address]),
+    {0,0,0,0,0,65535,E7,E8} = inet:ipv4_mapped_ipv6_address(IPv4Address),
+    IPv6Address =
+        {rand:uniform(65536) - 1,
+         rand:uniform(65536) - 1,
+         rand:uniform(65536) - 1,
+         rand:uniform(65536) - 1,
+         rand:uniform(65536) - 1,
+         rand:uniform(65536) - 1, E7, E8},
+    IPv4Address = inet:ipv4_mapped_ipv6_address(IPv6Address),
+    ok.
+
 t_gethostnative(Config) when is_list(Config) ->
     %% this will result in 26 bytes sent which causes problem in Windows
     %% if the port-program has not assured stdin to be read in BINARY mode
@@ -1083,11 +1104,9 @@ ifaddrs([{If,Opts}|IOs]) ->
     #ifopts{flags=F} = Ifopts = check_ifopts(Opts, #ifopts{name=If}),
     case F of
 	{flags,Flags} ->
-	    case lists:member(up, Flags) of
-		true ->
-		  Ifopts#ifopts.addrs;
-		false ->
-		    []
+	    case lists:member(running, Flags) of
+		true -> Ifopts#ifopts.addrs;
+		false -> []
 	    end ++ ifaddrs(IOs);
 	undefined ->
 	    ifaddrs(IOs)
diff --git a/lib/kernel/test/inet_res_SUITE.erl b/lib/kernel/test/inet_res_SUITE.erl
index 6691ad9c06..2a5b8d0044 100644
--- a/lib/kernel/test/inet_res_SUITE.erl
+++ b/lib/kernel/test/inet_res_SUITE.erl
@@ -217,10 +217,10 @@ proxy_start(TC, {NS,P}) ->
 	spawn_link(
 	  fun () ->
 		  try proxy_start(TC, NS, P, Parent, Tag)
-		  catch C:X ->
+		  catch C:X:Stacktrace ->
 			  io:format(
 			    "~w: ~w:~p ~p~n",
-			    [self(),C,X,erlang:get_stacktrace()])
+			    [self(),C,X,Stacktrace])
 		  end
 	  end),
     receive {started,Tag,Port} ->
diff --git a/lib/kernel/test/init_SUITE.erl b/lib/kernel/test/init_SUITE.erl
index 2b59eb2bfe..c8415b34e5 100644
--- a/lib/kernel/test/init_SUITE.erl
+++ b/lib/kernel/test/init_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -365,7 +365,9 @@ restart(Config) when is_list(Config) ->
     %% Ok, the node is up, now the real test test begins.
     erlang:monitor_node(Node, true),
     SysProcs0 = rpc:call(Node, ?MODULE, find_system_processes, []),
-    [InitPid, PurgerPid, LitCollectorPid, DirtyCodePid] = SysProcs0,
+    io:format("SysProcs0=~p~n", [SysProcs0]),
+    [InitPid, PurgerPid, LitCollectorPid,
+     DirtySigNPid, DirtySigHPid, DirtySigMPid] = SysProcs0,
     InitPid = rpc:call(Node, erlang, whereis, [init]),
     PurgerPid = rpc:call(Node, erlang, whereis, [erts_code_purger]),
     Procs = rpc:call(Node, erlang, processes, []),
@@ -381,7 +383,9 @@ restart(Config) when is_list(Config) ->
     ok = wait_restart(30, Node),
 
     SysProcs1 = rpc:call(Node, ?MODULE, find_system_processes, []),
-    [InitPid1, PurgerPid1, LitCollectorPid1, DirtyCodePid1] = SysProcs1,
+    io:format("SysProcs1=~p~n", [SysProcs1]),
+    [InitPid1, PurgerPid1, LitCollectorPid1,
+     DirtySigNPid1, DirtySigHPid1, DirtySigMPid1] = SysProcs1,
 
     %% Still the same init process!
     InitPid1 = rpc:call(Node, erlang, whereis, [init]),
@@ -394,20 +398,18 @@ restart(Config) when is_list(Config) ->
     PurgerP = pid_to_list(PurgerPid1),
 
     %% and same literal area collector process!
-    case LitCollectorPid of
-	undefined -> undefined = LitCollectorPid1;
-	_ ->
-	    LitCollectorP = pid_to_list(LitCollectorPid),
-	    LitCollectorP = pid_to_list(LitCollectorPid1)
-    end,
-
-    %% and same dirty process code checker process!
-    case DirtyCodePid of
-	undefined -> undefined = DirtyCodePid1;
-	_ ->
-	    DirtyCodeP = pid_to_list(DirtyCodePid),
-	    DirtyCodeP = pid_to_list(DirtyCodePid1)
-    end,
+    LitCollectorP = pid_to_list(LitCollectorPid),
+    LitCollectorP = pid_to_list(LitCollectorPid1),
+
+    %% and same normal dirty signal handler process!
+    DirtySigNP = pid_to_list(DirtySigNPid),
+    DirtySigNP = pid_to_list(DirtySigNPid1),
+    %% and same high dirty signal handler process!
+    DirtySigHP = pid_to_list(DirtySigHPid),
+    DirtySigHP = pid_to_list(DirtySigHPid1),
+    %% and same max dirty signal handler process!
+    DirtySigMP = pid_to_list(DirtySigMPid),
+    DirtySigMP = pid_to_list(DirtySigMPid1),
 
     NewProcs0 = rpc:call(Node, erlang, processes, []),
     NewProcs = NewProcs0 -- SysProcs1,
@@ -433,7 +435,9 @@ restart(Config) when is_list(Config) ->
 -record(sys_procs, {init,
 		    code_purger,
 		    literal_collector,
-		    dirty_proc_checker}).
+		    dirty_sig_handler_normal,
+		    dirty_sig_handler_high,
+		    dirty_sig_handler_max}).
 
 find_system_processes() ->
     find_system_procs(processes(), #sys_procs{}).
@@ -442,21 +446,32 @@ find_system_procs([], SysProcs) ->
     [SysProcs#sys_procs.init,
      SysProcs#sys_procs.code_purger,
      SysProcs#sys_procs.literal_collector,
-     SysProcs#sys_procs.dirty_proc_checker];
+     SysProcs#sys_procs.dirty_sig_handler_normal,
+     SysProcs#sys_procs.dirty_sig_handler_high,
+     SysProcs#sys_procs.dirty_sig_handler_max];
 find_system_procs([P|Ps], SysProcs) ->
-    case process_info(P, initial_call) of
-	{initial_call,{otp_ring0,start,2}} ->
+    case process_info(P, [initial_call, priority]) of
+	[{initial_call,{otp_ring0,start,2}},_] ->
 	    undefined = SysProcs#sys_procs.init,
 	    find_system_procs(Ps, SysProcs#sys_procs{init = P});
-	{initial_call,{erts_code_purger,start,0}} ->
+	[{initial_call,{erts_code_purger,start,0}},_] ->
 	    undefined = SysProcs#sys_procs.code_purger,
 	    find_system_procs(Ps, SysProcs#sys_procs{code_purger = P});
-	{initial_call,{erts_literal_area_collector,start,0}} ->
+	[{initial_call,{erts_literal_area_collector,start,0}},_] ->
 	    undefined = SysProcs#sys_procs.literal_collector,
 	    find_system_procs(Ps, SysProcs#sys_procs{literal_collector = P});
-	{initial_call,{erts_dirty_process_code_checker,start,0}} ->
-	    undefined = SysProcs#sys_procs.dirty_proc_checker,
-	    find_system_procs(Ps, SysProcs#sys_procs{dirty_proc_checker = P});
+	[{initial_call,{erts_dirty_process_signal_handler,start,0}},
+         {priority,normal}] ->
+	    undefined = SysProcs#sys_procs.dirty_sig_handler_normal,
+	    find_system_procs(Ps, SysProcs#sys_procs{dirty_sig_handler_normal = P});
+	[{initial_call,{erts_dirty_process_signal_handler,start,0}},
+                       {priority,high}] ->
+	    undefined = SysProcs#sys_procs.dirty_sig_handler_high,
+	    find_system_procs(Ps, SysProcs#sys_procs{dirty_sig_handler_high = P});
+	[{initial_call,{erts_dirty_process_signal_handler,start,0}},
+         {priority,max}] ->
+	    undefined = SysProcs#sys_procs.dirty_sig_handler_max,
+	    find_system_procs(Ps, SysProcs#sys_procs{dirty_sig_handler_max = P});
 	_ ->
 	    find_system_procs(Ps, SysProcs)
     end.
diff --git a/lib/kernel/test/kernel_SUITE.erl b/lib/kernel/test/kernel_SUITE.erl
index da56359294..7898988dbe 100644
--- a/lib/kernel/test/kernel_SUITE.erl
+++ b/lib/kernel/test/kernel_SUITE.erl
@@ -30,14 +30,14 @@
 -export([init_per_testcase/2, end_per_testcase/2]).
 
 %% Test cases must be exported.
--export([app_test/1, appup_test/1]).
+-export([app_test/1, appup_test/1, refc/1]).
 
 suite() ->
     [{ct_hooks,[ts_install_cth]},
      {timetrap,{minutes,2}}].
 
 all() -> 
-    [app_test, appup_test].
+    [app_test, appup_test, refc].
 
 groups() -> 
     [].
@@ -163,3 +163,68 @@ check_appup([Vsn|Vsns],Instrs,Expected) ->
     end;
 check_appup([],_,_) ->
     ok.
+
+%%% Check that refc module handles the counters as expected
+refc(_Config) ->
+    Enable = fun(Enable) -> erlang:system_flag(scheduler_wall_time, Enable) end,
+    IsOn = fun() -> undefined /= erlang:statistics(scheduler_wall_time) end,
+    Tester = self(),
+    Loop = fun Loop() ->
+                   receive
+                       die -> normal;
+                       {apply, Bool} ->
+                           Res = Enable(Bool),
+                           Tester ! {self(), Res},
+                           Loop()
+                   end
+           end,
+
+    %% Counter should be 0
+    false = Enable(false),
+
+    false = Enable(true),
+    true  = Enable(true),
+    true  = Enable(false),
+    true  = Enable(false),
+
+    %% Counter should be 0
+    false = IsOn(),
+
+    P1 = spawn_link(Loop),
+    P1 ! {apply, true},
+    receive {P1, R1} -> false = R1 end,
+
+    %% P1 has turned it on counter should be one
+    true = IsOn(),
+    true = Enable(true),
+    true = Enable(false),
+    true = IsOn(),
+
+    P1 ! {apply, false},
+    receive {P1, R2} -> true = R2 end,
+    false = IsOn(),
+
+    P1 ! {apply, true},
+    receive {P1, R3} -> false = R3 end,
+    true = IsOn(),
+    true = Enable(false),
+
+
+    P1 ! die,
+    timer:sleep(100),
+    false = IsOn(),
+    false = Enable(false),
+
+    P2 = spawn_link(Loop),
+    P2 ! {apply, true},
+    receive {P2, R4} -> false = R4 end,
+    true = IsOn(),
+    P2 ! {apply, true},
+    receive {P2, R5} -> true = R5 end,
+    true = IsOn(),
+
+    P2 ! die,
+    timer:sleep(100),
+    false = IsOn(),
+
+    ok.
diff --git a/lib/kernel/test/kernel_bench.spec b/lib/kernel/test/kernel_bench.spec
index 8de60dae31..4de133f21b 100644
--- a/lib/kernel/test/kernel_bench.spec
+++ b/lib/kernel/test/kernel_bench.spec
@@ -1 +1,2 @@
 {groups,"../kernel_test",zlib_SUITE,[bench]}.
+{groups,"../kernel_test",file_SUITE,[bench]}.
diff --git a/lib/kernel/test/os_SUITE.erl b/lib/kernel/test/os_SUITE.erl
index 8056321448..591fbb2125 100644
--- a/lib/kernel/test/os_SUITE.erl
+++ b/lib/kernel/test/os_SUITE.erl
@@ -26,7 +26,8 @@
          null_in_command/1, space_in_name/1, bad_command/1,
 	 find_executable/1, unix_comment_in_command/1, deep_list_command/1,
          large_output_command/1, background_command/0, background_command/1,
-         message_leak/1, close_stdin/0, close_stdin/1, perf_counter_api/1]).
+         message_leak/1, close_stdin/0, close_stdin/1, max_size_command/1,
+         perf_counter_api/1]).
 
 -include_lib("common_test/include/ct.hrl").
 
@@ -39,7 +40,7 @@ all() ->
      space_in_name, bad_command,
      find_executable, unix_comment_in_command, deep_list_command,
      large_output_command, background_command, message_leak,
-     close_stdin, perf_counter_api].
+     close_stdin, max_size_command, perf_counter_api].
 
 groups() ->
     [].
@@ -322,6 +323,19 @@ close_stdin(Config) ->
 
     "-1" = os:cmd(Fds).
 
+max_size_command(_Config) ->
+
+    Res20 = os:cmd("cat /dev/zero", #{ max_size => 20 }),
+    20 = length(Res20),
+
+    Res0 = os:cmd("cat /dev/zero", #{ max_size => 0 }),
+    0 = length(Res0),
+
+    Res32768 = os:cmd("cat /dev/zero", #{ max_size => 32768 }),
+    32768 = length(Res32768),
+
+    ResHello = string:trim(os:cmd("echo hello", #{ max_size => 20 })),
+    5 = length(ResHello).
 
 %% Test that the os:perf_counter api works as expected
 perf_counter_api(_Config) ->
diff --git a/lib/kernel/test/pdict_SUITE.erl b/lib/kernel/test/pdict_SUITE.erl
index d105952df9..a891451c82 100644
--- a/lib/kernel/test/pdict_SUITE.erl
+++ b/lib/kernel/test/pdict_SUITE.erl
@@ -33,6 +33,7 @@
 	 init_per_group/2,end_per_group/2,
 	 mixed/1,
          literals/1,
+         destructive/1,
 	 simple/1, complicated/1, heavy/1, simple_all_keys/1, info/1]).
 -export([init_per_testcase/2, end_per_testcase/2]).
 -export([other_process/2]).
@@ -52,6 +53,7 @@ suite() ->
 all() -> 
     [simple, complicated, heavy, simple_all_keys, info,
      literals,
+     destructive,
      mixed].
 
 groups() -> 
@@ -367,6 +369,36 @@ match_keys(All) ->
     ok.
 
 
+%% Test destructive put optimization of immed values
+%% does not affect get/0 or process_info.
+destructive(_Config) ->
+    Keys = lists:seq(1,100),
+    [put(Key, 17) || Key <- Keys],
+    Get1 = get(),
+    {dictionary,PI1} = process_info(self(), dictionary),
+
+    [begin
+         {Key, 17} = lists:keyfind(Key, 1, Get1),
+         {Key, 17} = lists:keyfind(Key, 1, PI1)
+     end
+     || Key <- Keys],
+
+    [17 = put(Key, 42) || Key <- Keys],   % Mutate
+
+    Get2 = get(),
+    {dictionary,PI2} = process_info(self(), dictionary),
+
+    [begin
+         {Key, 17} = lists:keyfind(Key, 1, Get1),
+         {Key, 17} = lists:keyfind(Key, 1, PI1),
+         {Key, 42} = lists:keyfind(Key, 1, Get2),
+         {Key, 42} = lists:keyfind(Key, 1, PI2)
+
+     end
+     || Key <- Keys],
+
+    ok.
+
 %% Do random mixed put/erase to test grow/shrink
 %% Written for a temporary bug in gc during shrink
 mixed(_Config) ->
diff --git a/lib/kernel/test/prim_file_SUITE.erl b/lib/kernel/test/prim_file_SUITE.erl
index 2f4330c217..5bb230d1c4 100644
--- a/lib/kernel/test/prim_file_SUITE.erl
+++ b/lib/kernel/test/prim_file_SUITE.erl
@@ -21,38 +21,23 @@
 -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
 	 init_per_group/2,end_per_group/2, init_per_testcase/2, end_per_testcase/2,
 	 read_write_file/1, free_memory/0]).
--export([cur_dir_0a/1, cur_dir_0b/1, 
-	 cur_dir_1a/1, cur_dir_1b/1, 
-	 make_del_dir_a/1, make_del_dir_b/1,
-	 pos1/1, pos2/1]).
--export([close/1, 
-	 delete_a/1, delete_b/1]).
--export([ open1/1, modes/1]).
--export([ 
-	  file_info_basic_file_a/1, file_info_basic_file_b/1,
-	  file_info_basic_directory_a/1, file_info_basic_directory_b/1,
-	  file_info_bad_a/1, file_info_bad_b/1, 
-	  file_info_times_a/1, file_info_times_b/1, 
-	  file_write_file_info_a/1, file_write_file_info_b/1,
-	  file_read_file_info_opts/1, file_write_file_info_opts/1,
-	  file_write_read_file_info_opts/1
-	]).
--export([rename_a/1, rename_b/1, 
-	 access/1, truncate/1, datasync/1, sync/1,
+-export([cur_dir_0/1, cur_dir_1/1,
+	 make_del_dir/1, pos1/1, pos2/1]).
+-export([close/1, delete/1]).
+-export([open1/1, modes/1]).
+-export([file_info_basic_file/1, file_info_basic_directory/1, file_info_bad/1,
+	 file_info_times/1, file_write_file_info/1,
+         file_read_file_info_opts/1, file_write_file_info_opts/1,
+	 file_write_read_file_info_opts/1]).
+-export([rename/1, access/1, truncate/1, datasync/1, sync/1,
 	 read_write/1, pread_write/1, append/1, exclusive/1]).
--export([ e_delete/1, e_rename/1, e_make_dir/1, e_del_dir/1]).
+-export([e_delete/1, e_rename/1, e_make_dir/1, e_del_dir/1]).
 
--export([ read_not_really_compressed/1,
-	  read_compressed/1, write_compressed/1,
-	  compress_errors/1]).
-
--export([ 
-	  make_link_a/1, make_link_b/1,
-	  read_link_info_for_non_link/1, 
-	  symlinks_a/1, symlinks_b/1,
-	  list_dir_limit/1,
-	  list_dir_error/1,
-	  list_dir/1]).
+-export([make_link/1, read_link_info_for_non_link/1,
+	 symlinks/1,
+	 list_dir_limit/1,
+	 list_dir_error/1,
+	 list_dir/1]).
 
 -export([advise/1]).
 -export([large_write/1]).
@@ -67,29 +52,16 @@
 
 -define(PRIM_FILE, prim_file).
 
-%% Calls ?PRIM_FILE:F with arguments A and an optional handle H 
-%% as first argument, unless the handle is [], i.e no handle.
-%% This is a macro to give the compiler and thereby 
-%% the cross reference tool the possibility to interprete
-%% the call, since M, F, A (or [H | A]) can all be known at 
-%% compile time.
--define(PRIM_FILE_call(F, H, A), 
-	case H of
-	    [] -> apply(?PRIM_FILE, F, A);
-	    _ ->  apply(?PRIM_FILE, F, [H | A])
-	end).
-
 suite() -> [].
 
 all() -> 
     [read_write_file, {group, dirs}, {group, files},
-     delete_a, delete_b, rename_a, rename_b, {group, errors},
-     {group, compression}, {group, links}, list_dir_limit, list_dir].
+     delete, rename, {group, errors}, {group, links},
+     list_dir_limit, list_dir].
 
 groups() -> 
     [{dirs, [],
-      [make_del_dir_a, make_del_dir_b, cur_dir_0a, cur_dir_0b,
-       cur_dir_1a, cur_dir_1b]},
+      [make_del_dir, cur_dir_0, cur_dir_1]},
      {files, [],
       [{group, open}, {group, pos}, {group, file_info},
        truncate, sync, datasync, advise, large_write, allocate]},
@@ -98,22 +70,14 @@ groups() ->
        append, exclusive]},
      {pos, [], [pos1, pos2]},
      {file_info, [],
-      [file_info_basic_file_a, file_info_basic_file_b,
-       file_info_basic_directory_a,
-       file_info_basic_directory_b, file_info_bad_a,
-       file_info_bad_b, file_info_times_a, file_info_times_b,
-       file_write_file_info_a, file_write_file_info_b,
-       file_read_file_info_opts, file_write_file_info_opts,
-       file_write_read_file_info_opts
+      [file_info_basic_file,file_info_basic_directory, file_info_bad,
+       file_info_times, file_write_file_info, file_read_file_info_opts,
+       file_write_file_info_opts, file_write_read_file_info_opts
       ]},
      {errors, [],
       [e_delete, e_rename, e_make_dir, e_del_dir]},
-     {compression, [],
-      [read_compressed, read_not_really_compressed,
-       write_compressed, compress_errors]},
      {links, [],
-      [make_link_a, make_link_b, read_link_info_for_non_link,
-       symlinks_a, symlinks_b, list_dir_error]}].
+      [make_link, read_link_info_for_non_link, symlinks, list_dir_error]}].
 
 init_per_testcase(large_write, Config) ->
     {ok, Started} = application:ensure_all_started(os_mon),
@@ -246,39 +210,27 @@ read_write_file(Config) when is_list(Config) ->
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-
-make_del_dir_a(Config) when is_list(Config) ->
-    make_del_dir(Config, [], "_a").
-
-make_del_dir_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = make_del_dir(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    %% Just to make sure the state of the server makes a difference
-    {error, einval} = ?PRIM_FILE_call(get_cwd, Handle, []),
-    Result.
-
-make_del_dir(Config, Handle, Suffix) ->
+make_del_dir(Config) when is_list(Config) ->
     RootDir = proplists:get_value(priv_dir,Config),
     NewDir = filename:join(RootDir,
 			   atom_to_list(?MODULE)
-			   ++"_mk-dir"++Suffix),
-    ok = ?PRIM_FILE_call(make_dir, Handle, [NewDir]),
-    {error, eexist} = ?PRIM_FILE_call(make_dir, Handle, [NewDir]),
-    ok = ?PRIM_FILE_call(del_dir, Handle, [NewDir]),
-    {error, enoent} = ?PRIM_FILE_call(del_dir, Handle, [NewDir]),
+			   ++"_mk-dir"),
+    ok = ?PRIM_FILE:make_dir(NewDir),
+    {error, eexist} = ?PRIM_FILE:make_dir(NewDir),
+    ok = ?PRIM_FILE:del_dir(NewDir),
+    {error, enoent} = ?PRIM_FILE:del_dir(NewDir),
 
     %% Make sure we are not in a directory directly under test_server
     %% as that would result in eacces errors when trying to delete '..',
     %% because there are processes having that directory as current.
-    ok = ?PRIM_FILE_call(make_dir, Handle, [NewDir]),
-    {ok, CurrentDir} = ?PRIM_FILE_call(get_cwd, Handle, []),
+    ok = ?PRIM_FILE:make_dir(NewDir),
+    {ok, CurrentDir} = ?PRIM_FILE:get_cwd(),
     case {os:type(), length(NewDir) >= 260 } of
 	{{win32,_}, true} ->
 	    io:format("Skip set_cwd for windows path longer than 260 (MAX_PATH)\n", []),
 	    io:format("\nNewDir = ~p\n", [NewDir]);
 	_ ->
-	    ok = ?PRIM_FILE_call(set_cwd, Handle, [NewDir])
+	    ok = ?PRIM_FILE:set_cwd(NewDir)
     end,
     try
 	%% Check that we get an error when trying to create...
@@ -286,14 +238,14 @@ make_del_dir(Config, Handle, Suffix) ->
 	NewDir2 = filename:join(RootDir,
 				atom_to_list(?MODULE)
 				++"_mk-dir-noexist/foo"),
-	{error, enoent} = ?PRIM_FILE_call(make_dir, Handle, [NewDir2]),
+	{error, enoent} = ?PRIM_FILE:make_dir(NewDir2),
 	%% a nameless directory
-	{error, enoent} = ?PRIM_FILE_call(make_dir, Handle, [""]),
+	{error, enoent} = ?PRIM_FILE:make_dir(""),
 	%% a directory with illegal name
-	{error, badarg} = ?PRIM_FILE_call(make_dir, Handle, ['mk-dir']),
+	{error, badarg} = ?PRIM_FILE:make_dir('mk-dir'),
 
 	%% a directory with illegal name, even if it's a (bad) list
-	{error, badarg} = ?PRIM_FILE_call(make_dir, Handle, [[1,2,3,{}]]),
+	{error, badarg} = ?PRIM_FILE:make_dir([1,2,3,{}]),
 
 	%% Maybe this isn't an error, exactly, but worth mentioning anyway:
 	%% ok = ?PRIM_FILE:make_dir([$f,$o,$o,0,$b,$a,$r])),
@@ -306,125 +258,101 @@ make_del_dir(Config, Handle, Suffix) ->
 	%% Try deleting some bad directories
 	%% Deleting the parent directory to the current, sounds dangerous, huh?
 	%% Don't worry ;-) the parent directory should never be empty, right?
-	case ?PRIM_FILE_call(del_dir, Handle, [".."]) of
+	case ?PRIM_FILE:del_dir("..") of
 	    {error, eexist} -> ok;
 	    {error, eacces} -> ok;	%OpenBSD
 	    {error, einval} -> ok		%FreeBSD
 	end,
-	{error, enoent} = ?PRIM_FILE_call(del_dir, Handle, [""]),
-	{error, badarg} = ?PRIM_FILE_call(del_dir, Handle, [[3,2,1,{}]])
+	{error, enoent} = ?PRIM_FILE:del_dir(""),
+	{error, badarg} = ?PRIM_FILE:del_dir([3,2,1,{}])
     after
-	ok = ?PRIM_FILE_call(set_cwd, Handle, [CurrentDir])
+	ok = ?PRIM_FILE:set_cwd(CurrentDir)
     end,
     ok.
 
-cur_dir_0a(Config) when is_list(Config) ->
-    cur_dir_0(Config, []).
-
-cur_dir_0b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = cur_dir_0(Config, Handle),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-cur_dir_0(Config, Handle) ->
+cur_dir_0(Config) when is_list(Config) ->
     %% Find out the current dir, and cd to it ;-)
-    {ok,BaseDir} = ?PRIM_FILE_call(get_cwd, Handle, []),
+    {ok,BaseDir} = ?PRIM_FILE:get_cwd(),
     Dir1 = BaseDir ++ "", %% Check that it's a string
-    ok = ?PRIM_FILE_call(set_cwd, Handle, [Dir1]),
-    DirName = atom_to_list(?MODULE) ++
-	case Handle of
-	    [] ->
-		"_curdir";
-	    _ ->
-		"_curdir_h"
-	end,
+    ok = ?PRIM_FILE:set_cwd(Dir1),
+    DirName = atom_to_list(?MODULE) ++ "_curdir",
 
     %% Make a new dir, and cd to that
     RootDir = proplists:get_value(priv_dir,Config),
     NewDir = filename:join(RootDir, DirName),
-    ok = ?PRIM_FILE_call(make_dir, Handle, [NewDir]),
+    ok = ?PRIM_FILE:make_dir(NewDir),
     case {os:type(), length(NewDir) >= 260} of
 	{{win32,_}, true} ->
 	    io:format("Skip set_cwd for windows path longer than 260 (MAX_PATH):\n"),
 	    io:format("\nNewDir = ~p\n", [NewDir]);
 	_ ->
 	    io:format("cd to ~s",[NewDir]),
-	    ok = ?PRIM_FILE_call(set_cwd, Handle, [NewDir]),
+	    ok = ?PRIM_FILE:set_cwd(NewDir),
 
 	    %% Create a file in the new current directory, and check that it
 	    %% really is created there
 	    UncommonName = "uncommon.fil",
 	    {ok,Fd} = ?PRIM_FILE:open(UncommonName, [read, write]),
 	    ok = ?PRIM_FILE:close(Fd),
-	    {ok,NewDirFiles} = ?PRIM_FILE_call(list_dir, Handle, ["."]),
+	    {ok,NewDirFiles} = ?PRIM_FILE:list_dir("."),
 	    true = lists:member(UncommonName,NewDirFiles),
 
 	    %% Delete the directory and return to the old current directory
 	    %% and check that the created file isn't there (too!)
 	    expect({error, einval}, {error, eacces}, {error, eexist},
-		   ?PRIM_FILE_call(del_dir, Handle, [NewDir])),
-	    ?PRIM_FILE_call(delete, Handle, [UncommonName]),
-	    {ok,[]} = ?PRIM_FILE_call(list_dir, Handle, ["."]),
-	    ok = ?PRIM_FILE_call(set_cwd, Handle, [Dir1]),
+		   ?PRIM_FILE:del_dir(NewDir)),
+	    ?PRIM_FILE:delete(UncommonName),
+	    {ok,[]} = ?PRIM_FILE:list_dir("."),
+	    ok = ?PRIM_FILE:set_cwd(Dir1),
 	    io:format("cd back to ~s",[Dir1]),
-	    ok = ?PRIM_FILE_call(del_dir, Handle, [NewDir]),
-	    {error, enoent} = ?PRIM_FILE_call(set_cwd, Handle, [NewDir]),
-	    ok = ?PRIM_FILE_call(set_cwd, Handle, [Dir1]),
+	    ok = ?PRIM_FILE:del_dir(NewDir),
+	    {error, enoent} = ?PRIM_FILE:set_cwd(NewDir),
+	    ok = ?PRIM_FILE:set_cwd(Dir1),
 	    io:format("cd back to ~s",[Dir1]),
-	    {ok,OldDirFiles} = ?PRIM_FILE_call(list_dir, Handle, ["."]),
+	    {ok,OldDirFiles} = ?PRIM_FILE:list_dir("."),
 	    false = lists:member(UncommonName,OldDirFiles)
     end,
 
     %% Try doing some bad things
     {error, badarg} =
-	?PRIM_FILE_call(set_cwd, Handle, [{foo,bar}]),
+	?PRIM_FILE:set_cwd({foo,bar}),
     {error, enoent} =
-	?PRIM_FILE_call(set_cwd, Handle, [""]),
+	?PRIM_FILE:set_cwd(""),
     {error, enoent} =
-	?PRIM_FILE_call(set_cwd, Handle, [".......a......"]),
+	?PRIM_FILE:set_cwd(".......a......"),
     {ok,BaseDir} =
-	?PRIM_FILE_call(get_cwd, Handle, []), %% Still there?
+	?PRIM_FILE:get_cwd(), %% Still there?
 
     %% On Windows, there should only be slashes, no backslashes,
     %% in the return value of get_cwd().
     %% (The test is harmless on Unix, because filenames usually
     %% don't contain backslashes.)
 
-    {ok, BaseDir} = ?PRIM_FILE_call(get_cwd, Handle, []),
+    {ok, BaseDir} = ?PRIM_FILE:get_cwd(),
     false = lists:member($\\, BaseDir),
 
     ok.
 
 %% Tests ?PRIM_FILE:get_cwd/1.
 
-cur_dir_1a(Config) when is_list(Config) ->
-    cur_dir_1(Config, []).
-
-cur_dir_1b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = cur_dir_1(Config, Handle),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-cur_dir_1(Config, Handle) ->
+cur_dir_1(Config) when is_list(Config) ->
     case os:type() of
 	{win32, _} ->
-	    win_cur_dir_1(Config, Handle);
+	    win_cur_dir_1(Config);
 	_ ->
 	    {error, enotsup} =
-		?PRIM_FILE_call(get_cwd, Handle, ["d:"])
+		?PRIM_FILE:get_cwd("d:")
     end,
     ok.
 
-win_cur_dir_1(_Config, Handle) ->
-    {ok, BaseDir} = ?PRIM_FILE_call(get_cwd, Handle, []),
+win_cur_dir_1(_Config) ->
+    {ok, BaseDir} = ?PRIM_FILE:get_cwd(),
 
     %% Get the drive letter from the current directory,
     %% and try to get current directory for that drive.
 
     [Drive, $:|_] = BaseDir,
-    {ok, BaseDir} = ?PRIM_FILE_call(get_cwd, Handle, [[Drive, $:]]),
+    {ok, BaseDir} = ?PRIM_FILE:get_cwd([Drive, $:]),
     io:format("BaseDir = ~s\n", [BaseDir]),
 
     %% Unfortunately, there is no way to move away from the
@@ -446,12 +374,12 @@ open1(Config) when is_list(Config) ->
     Name = filename:join(NewDir, "foo1.fil"),
     {ok,Fd1} = ?PRIM_FILE:open(Name, [read, write]),
     {ok,Fd2} = ?PRIM_FILE:open(Name, [read]),
-    Str = "{a,tuple}.\n",
-    Length = length(Str),
-    ?PRIM_FILE:write(Fd1,Str),
+    Bin = list_to_binary("{a,tuple}.\n"),
+    Length = byte_size(Bin),
+    ?PRIM_FILE:write(Fd1,Bin),
     {ok,0} = ?PRIM_FILE:position(Fd1,bof),
-    {ok, Str} = ?PRIM_FILE:read(Fd1,Length),
-    {ok, Str} = ?PRIM_FILE:read(Fd2,Length),
+    {ok, Bin} = ?PRIM_FILE:read(Fd1,Length),
+    {ok, Bin} = ?PRIM_FILE:read(Fd2,Length),
     ok = ?PRIM_FILE:close(Fd2),
     {ok,0} = ?PRIM_FILE:position(Fd1,bof),
     ok = ?PRIM_FILE:truncate(Fd1),
@@ -471,13 +399,13 @@ modes(Config) when is_list(Config) ->
 			   ++"_open_modes"),
     ok = ?PRIM_FILE:make_dir(NewDir),
     Name1 = filename:join(NewDir, "foo1.fil"),
-    Marker = "hello, world",
-    Length = length(Marker),
+    Marker = <<"hello, world">>,
+    Length = byte_size(Marker),
 
     %% write
     {ok, Fd1} = ?PRIM_FILE:open(Name1, [write]),
     ok = ?PRIM_FILE:write(Fd1, Marker),
-    ok = ?PRIM_FILE:write(Fd1, ".\n"),
+    ok = ?PRIM_FILE:write(Fd1, <<".\n">>),
     ok = ?PRIM_FILE:close(Fd1),
 
     %% read
@@ -496,12 +424,6 @@ modes(Config) when is_list(Config) ->
     {ok, Marker} = ?PRIM_FILE:read(Fd4, Length),
     ok = ?PRIM_FILE:close(Fd4),
 
-    %% read and binary
-    BinaryMarker = list_to_binary(Marker),
-    {ok, Fd5} = ?PRIM_FILE:open(Name1, [read, binary]),
-    {ok, BinaryMarker} = ?PRIM_FILE:read(Fd5, Length),
-    ok = ?PRIM_FILE:close(Fd5),
-
     ok.
 
 close(Config) when is_list(Config) ->
@@ -528,9 +450,9 @@ access(Config) when is_list(Config) ->
     Name = filename:join(RootDir,
 			 atom_to_list(?MODULE)
 			 ++"_access.fil"),
-    Str = "ABCDEFGH",
+    Bin = <<"ABCDEFGH">>,
     {ok,Fd1} = ?PRIM_FILE:open(Name, [write]),
-    ?PRIM_FILE:write(Fd1,Str),
+    ?PRIM_FILE:write(Fd1,Bin),
     ok = ?PRIM_FILE:close(Fd1),
     %% Check that we can't write when in read only mode
     {ok,Fd2} = ?PRIM_FILE:open(Name, [read]),
@@ -542,7 +464,7 @@ access(Config) when is_list(Config) ->
     end,
     ok = ?PRIM_FILE:close(Fd2),
     {ok, Fd3} = ?PRIM_FILE:open(Name, [read]),
-    {ok, Str} = ?PRIM_FILE:read(Fd3,length(Str)),
+    {ok, Bin} = ?PRIM_FILE:read(Fd3,byte_size(Bin)),
     ok = ?PRIM_FILE:close(Fd3),
 
     ok.
@@ -564,7 +486,7 @@ read_write(Config) when is_list(Config) ->
     ok.
 
 read_write_test(File) ->
-    Marker = "hello, world",
+    Marker = <<"hello, world">>,
     ok = ?PRIM_FILE:write(File, Marker),
     {ok, 0} = ?PRIM_FILE:position(File, 0),
     {ok, Marker} = ?PRIM_FILE:read(File, 100),
@@ -590,15 +512,15 @@ pread_write(Config) when is_list(Config) ->
     ok.
 
 pread_write_test(File) ->
-    Marker = "hello, world",
-    Len = length(Marker),
+    Marker = <<"hello, world">>,
+    Len = byte_size(Marker),
     ok = ?PRIM_FILE:write(File, Marker),
     {ok, Marker} = ?PRIM_FILE:pread(File, 0, 100),
     eof = ?PRIM_FILE:pread(File, 100, 1),
     ok = ?PRIM_FILE:pwrite(File, Len, Marker),
     {ok, Marker} = ?PRIM_FILE:pread(File, Len, 100),
     eof = ?PRIM_FILE:pread(File, 100, 1),
-    MM = Marker ++ Marker,
+    MM = <<Marker/binary,Marker/binary>>,
     {ok, MM} = ?PRIM_FILE:pread(File, 0, 100),
     ok = ?PRIM_FILE:close(File),
     ok.
@@ -655,24 +577,24 @@ pos1(Config) when is_list(Config) ->
 			 atom_to_list(?MODULE)
 			 ++"_pos1.fil"),
     {ok, Fd1} = ?PRIM_FILE:open(Name, [write]),
-    ?PRIM_FILE:write(Fd1,"ABCDEFGH"),
+    ?PRIM_FILE:write(Fd1,<<"ABCDEFGH">>),
     ok        = ?PRIM_FILE:close(Fd1),
     {ok, Fd2} = ?PRIM_FILE:open(Name, [read]),
 
     %% Start pos is first char
     io:format("Relative positions"),
-    {ok, "A"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"A">>} = ?PRIM_FILE:read(Fd2,1),
     {ok, 2}   = ?PRIM_FILE:position(Fd2,{cur,1}),
-    {ok, "C"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"C">>} = ?PRIM_FILE:read(Fd2,1),
     {ok, 0}   = ?PRIM_FILE:position(Fd2,{cur,-3}),
-    {ok, "A"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"A">>} = ?PRIM_FILE:read(Fd2,1),
     %% Backwards from first char should be an error
     {ok,0}    = ?PRIM_FILE:position(Fd2,{cur,-1}),
     {error, einval} = ?PRIM_FILE:position(Fd2,{cur,-1}),
     %% Reset position and move again
     {ok, 0}   = ?PRIM_FILE:position(Fd2,0),
     {ok, 2}   = ?PRIM_FILE:position(Fd2,{cur,2}),
-    {ok, "C"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"C">>} = ?PRIM_FILE:read(Fd2,1),
     %% Go a lot forwards
     {ok, 13}  = ?PRIM_FILE:position(Fd2,{cur,10}),
     eof       = ?PRIM_FILE:read(Fd2,1),
@@ -684,27 +606,27 @@ pos1(Config) when is_list(Config) ->
     {ok, 8}   = ?PRIM_FILE:position(Fd2,cur),
     eof = ?PRIM_FILE:read(Fd2,1),
     {ok, 7}   = ?PRIM_FILE:position(Fd2,7),
-    {ok, "H"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"H">>} = ?PRIM_FILE:read(Fd2,1),
     {ok, 0}   = ?PRIM_FILE:position(Fd2,0),
-    {ok, "A"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"A">>} = ?PRIM_FILE:read(Fd2,1),
     {ok, 3}   = ?PRIM_FILE:position(Fd2,3),
-    {ok, "D"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"D">>} = ?PRIM_FILE:read(Fd2,1),
     {ok, 12}  = ?PRIM_FILE:position(Fd2,12),
     eof       = ?PRIM_FILE:read(Fd2,1),
     {ok, 3}   = ?PRIM_FILE:position(Fd2,3),
-    {ok, "D"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"D">>} = ?PRIM_FILE:read(Fd2,1),
     %% Try the {bof,X} notation
     {ok, 3}   = ?PRIM_FILE:position(Fd2,{bof,3}),
-    {ok, "D"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"D">>} = ?PRIM_FILE:read(Fd2,1),
 
     %% Try eof positions
     io:format("EOF positions"),
     {ok, 8}   = ?PRIM_FILE:position(Fd2,{eof,0}),
     eof       = ?PRIM_FILE:read(Fd2,1),
     {ok, 7}   = ?PRIM_FILE:position(Fd2,{eof,-1}),
-    {ok, "H"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"H">>} = ?PRIM_FILE:read(Fd2,1),
     {ok, 0}   = ?PRIM_FILE:position(Fd2,{eof,-8}),
-    {ok, "A"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"A">>} = ?PRIM_FILE:read(Fd2,1),
     {error, einval} = ?PRIM_FILE:position(Fd2,{eof,-9}),
     ok.
 
@@ -714,7 +636,7 @@ pos2(Config) when is_list(Config) ->
 			 atom_to_list(?MODULE)
 			 ++"_pos2.fil"),
     {ok,Fd1} = ?PRIM_FILE:open(Name, [write]),
-    ?PRIM_FILE:write(Fd1,"ABCDEFGH"),
+    ?PRIM_FILE:write(Fd1,<<"ABCDEFGH">>),
     ok = ?PRIM_FILE:close(Fd1),
     {ok, Fd2} = ?PRIM_FILE:open(Name, [read]),
     {error, einval} = ?PRIM_FILE:position(Fd2,-1),
@@ -722,35 +644,25 @@ pos2(Config) when is_list(Config) ->
     %% Make sure that we still can search after an error.
     {ok, 0}   = ?PRIM_FILE:position(Fd2, 0),
     {ok, 3}   = ?PRIM_FILE:position(Fd2, {bof,3}),
-    {ok, "D"} = ?PRIM_FILE:read(Fd2,1),
+    {ok, <<"D">>} = ?PRIM_FILE:read(Fd2,1),
 
     io:format("DONE"),
     ok.
 
-
-file_info_basic_file_a(Config) when is_list(Config) ->
-    file_info_basic_file(Config, [], "_a").
-
-file_info_basic_file_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = file_info_basic_file(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-file_info_basic_file(Config, Handle, Suffix) ->
+file_info_basic_file(Config) when is_list(Config) ->
     RootDir = proplists:get_value(priv_dir, Config),
 
     %% Create a short file.
     Name = filename:join(RootDir,
 			 atom_to_list(?MODULE)
-			 ++"_basic_test"++Suffix++".fil"),
+			 ++"_basic_test"".fil"),
     {ok,Fd1} = ?PRIM_FILE:open(Name, [write]),
     ?PRIM_FILE:write(Fd1, "foo bar"),
     ok = ?PRIM_FILE:close(Fd1),
 
     %% Test that the file has the expected attributes.
     %% The times are tricky, so we will save them to a separate test case.
-    {ok, FileInfo} = ?PRIM_FILE_call(read_file_info, Handle, [Name]),
+    {ok, FileInfo} = ?PRIM_FILE:read_file_info(Name),
     #file_info{size = Size, type = Type, access = Access,
 	       atime = AccessTime, mtime = ModifyTime} =
 	FileInfo,
@@ -768,39 +680,30 @@ file_info_basic_file(Config, Handle, Suffix) ->
 
     ok.
 
-file_info_basic_directory_a(Config) when is_list(Config) ->
-    file_info_basic_directory(Config, []).
-
-file_info_basic_directory_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = file_info_basic_directory(Config, Handle),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-file_info_basic_directory(Config, Handle) ->
+file_info_basic_directory(Config) when is_list(Config) ->
     %% Note: filename:join/1 removes any trailing slash,
     %% which is essential for ?PRIM_FILE:read_file_info/1 to work on
     %% platforms such as Windows95.
     RootDir = filename:join([proplists:get_value(priv_dir, Config)]),
 
     %% Test that the RootDir directory has the expected attributes.
-    test_directory(RootDir, read_write, Handle),
+    test_directory(RootDir, read_write),
 
     %% Note that on Windows file systems, "/" or "c:/" are *NOT* directories.
     %% Therefore, test that ?PRIM_FILE:read_file_info/1 behaves 
     %% as if they were directories.
     case os:type() of
 	{win32, _} ->
-	    test_directory("/", read_write, Handle),
-	    test_directory("c:/", read_write, Handle),
-	    test_directory("c:\\", read_write, Handle);
+	    test_directory("/", read_write),
+	    test_directory("c:/", read_write),
+	    test_directory("c:\\", read_write);
 	_ ->
-	    test_directory("/", read, Handle)
+	    test_directory("/", read)
     end,
     ok.
 
-test_directory(Name, ExpectedAccess, Handle) ->
-    {ok, FileInfo} = ?PRIM_FILE_call(read_file_info, Handle, [Name]),
+test_directory(Name, ExpectedAccess) ->
+    {ok, FileInfo} = ?PRIM_FILE:read_file_info(Name),
     #file_info{size = Size, type = Type, access = Access,
 	       atime = AccessTime, mtime = ModifyTime} =
 	FileInfo,
@@ -824,45 +727,24 @@ all_integers([]) ->
 
 %% Try something nonexistent.
 
-file_info_bad_a(Config) when is_list(Config) ->
-    file_info_bad(Config, []).
-
-file_info_bad_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = file_info_bad(Config, Handle),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-file_info_bad(Config, Handle) ->
+file_info_bad(Config) when is_list(Config) ->
     RootDir = filename:join([proplists:get_value(priv_dir, Config)]),
-    {error, enoent} =
-	?PRIM_FILE_call(
-	   read_file_info, Handle, 
-	   [filename:join(RootDir,
-			  atom_to_list(?MODULE)++"_nonexistent")]),
+    NonExistent = filename:join(RootDir, atom_to_list(?MODULE)++"_nonexistent"),
+    {error, enoent} = ?PRIM_FILE:read_file_info(NonExistent),
     ok.
 
 %% Test that the file times behave as they should.
 
-file_info_times_a(Config) when is_list(Config) ->
-    file_info_times(Config, [], "_a").
-
-file_info_times_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = file_info_times(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-file_info_times(Config, Handle, Suffix) ->
+file_info_times(Config) when is_list(Config) ->
     %% We have to try this twice, since if the test runs across the change
     %% of a month the time diff calculations will fail. But it won't happen
     %% if you run it twice in succession.
     test_server:m_out_of_n(
       1,2,
-      fun() -> file_info_int(Config, Handle, Suffix) end),
+      fun() -> file_info_int(Config) end),
     ok.
 
-file_info_int(Config, Handle, Suffix) ->
+file_info_int(Config) ->
     %% Note: filename:join/1 removes any trailing slash,
     %% which is essential for ?PRIM_FILE:read_file_info/1 to work on
     %% platforms such as Windows95.
@@ -872,14 +754,14 @@ file_info_int(Config, Handle, Suffix) ->
 
     Name = filename:join(RootDir,
 			 atom_to_list(?MODULE)
-			 ++"_file_info"++Suffix++".fil"),
+			 ++"_file_info.fil"),
     {ok,Fd1} = ?PRIM_FILE:open(Name, [write]),
     ?PRIM_FILE:write(Fd1,"foo"),
 
     %% check that the file got a modify date max a few seconds away from now
     {ok, #file_info{type = regular,
 		    atime = AccTime1, mtime = ModTime1}} =
-	?PRIM_FILE_call(read_file_info, Handle, [Name]),
+	?PRIM_FILE:read_file_info(Name),
     Now = erlang:localtime(),
     io:format("Now ~p",[Now]),
     io:format("Open file Acc ~p Mod ~p",[AccTime1,ModTime1]),
@@ -897,7 +779,7 @@ file_info_int(Config, Handle, Suffix) ->
     ok = ?PRIM_FILE:close(Fd1),
     {ok, #file_info{size = Size, type = regular, access = Access,
 		    atime = AccTime2, mtime = ModTime2}} =
-	?PRIM_FILE_call(read_file_info, Handle, [Name]),
+	?PRIM_FILE:read_file_info(Name),
     io:format("Closed file Acc ~p Mod ~p",[AccTime2,ModTime2]),
     true = time_dist(ModTime1, ModTime2) >= 0,
 
@@ -909,7 +791,7 @@ file_info_int(Config, Handle, Suffix) ->
     {ok, #file_info{size = DSize, type = directory,
 		    access = DAccess,
 		    atime = AccTime3, mtime = ModTime3}} =
-	?PRIM_FILE_call(read_file_info, Handle, [RootDir]),
+	?PRIM_FILE:read_file_info(RootDir),
     %% this dir was modified only a few secs ago
     io:format("Dir Acc ~p; Mod ~p; Now ~p",
 	      [AccTime3, ModTime3, Now]),
@@ -936,16 +818,7 @@ filter_atime(Atime, Config) ->
 
 %% Test the write_file_info/2 function.
 
-file_write_file_info_a(Config) when is_list(Config) ->
-    file_write_file_info(Config, [], "_a").
-
-file_write_file_info_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = file_write_file_info(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-file_write_file_info(Config, Handle, Suffix) ->
+file_write_file_info(Config) when is_list(Config) ->
     RootDir = get_good_directory(Config),
     io:format("RootDir = ~p", [RootDir]),
 
@@ -955,16 +828,16 @@ file_write_file_info(Config, Handle, Suffix) ->
 
     Name = filename:join(RootDir,
 			 atom_to_list(?MODULE)
-			 ++"_write_file_info_ro"++Suffix),
+			 ++"_write_file_info_ro"),
     ok = ?PRIM_FILE:write_file(Name, "hello"),
     Time = {{1997, 01, 02}, {12, 35, 42}},
     Info = #file_info{mode=8#400, atime=Time, mtime=Time, ctime=Time},
-    ok = ?PRIM_FILE_call(write_file_info, Handle, [Name, Info]),
+    ok = ?PRIM_FILE:write_file_info(Name, Info),
 
     %% Read back the times.
 
     {ok, ActualInfo} =
-	?PRIM_FILE_call(read_file_info, Handle, [Name]),
+	?PRIM_FILE:read_file_info(Name),
     #file_info{mode=_Mode, atime=ActAtime, mtime=Time,
 	       ctime=ActCtime} = ActualInfo,
     FilteredAtime = filter_atime(Time, Config),
@@ -980,14 +853,11 @@ file_write_file_info(Config, Handle, Suffix) ->
     {error, eacces} = ?PRIM_FILE:write_file(Name, "hello again"),
 
     %% Make the file writable again.
-
-    ?PRIM_FILE_call(write_file_info, Handle,
-		    [Name, #file_info{mode=8#600}]),
+    ?PRIM_FILE:write_file_info(Name, #file_info{mode=8#600}),
     ok = ?PRIM_FILE:write_file(Name, "hello again"),
 
     %% And unwritable.
-    ?PRIM_FILE_call(write_file_info, Handle,
-		    [Name, #file_info{mode=8#400}]),
+    ?PRIM_FILE:write_file_info(Name, #file_info{mode=8#400}),
     {error, eacces} = ?PRIM_FILE:write_file(Name, "hello again"),
 
     %% Write the times again.
@@ -995,9 +865,9 @@ file_write_file_info(Config, Handle, Suffix) ->
 
     NewTime = {{1997, 02, 15}, {13, 18, 20}},
     NewInfo = #file_info{atime=NewTime, mtime=NewTime, ctime=NewTime},
-    ok = ?PRIM_FILE_call(write_file_info, Handle, [Name, NewInfo]),
+    ok = ?PRIM_FILE:write_file_info(Name, NewInfo),
     {ok, ActualInfo2} =
-	?PRIM_FILE_call(read_file_info, Handle, [Name]),
+	?PRIM_FILE:read_file_info(Name),
     #file_info{atime=NewActAtime, mtime=NewTime,
 	       ctime=NewActCtime} = ActualInfo2,
     NewFilteredAtime = filter_atime(NewTime, Config),
@@ -1012,14 +882,12 @@ file_write_file_info(Config, Handle, Suffix) ->
 
     %% Make the file writeable again, so that we can remove the
     %% test suites ... :-)
-    ?PRIM_FILE_call(write_file_info, Handle,
-		    [Name, #file_info{mode=8#600}]),
+    ?PRIM_FILE:write_file_info(Name, #file_info{mode=8#600}),
     ok.
 
 %% Test the write_file_info/3 function.
 
 file_write_file_info_opts(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
     RootDir = get_good_directory(Config),
     io:format("RootDir = ~p", [RootDir]),
 
@@ -1028,7 +896,7 @@ file_write_file_info_opts(Config) when is_list(Config) ->
 
     lists:foreach(fun
 		      ({FI, Opts}) ->
-			 ok = ?PRIM_FILE_call(write_file_info, Handle, [Name, FI, Opts])
+			 ok = ?PRIM_FILE:write_file_info(Name, FI, Opts)
 		 end, [
 			{#file_info{ mode=8#600, atime = Time, mtime = Time, ctime = Time}, Opts} ||
 			  Opts <- [[{time, posix}]],
@@ -1038,7 +906,7 @@ file_write_file_info_opts(Config) when is_list(Config) ->
     %% REM: determine date range dependent on time_t = Uint32 | Sint32 | Sint64 | Uint64
     %% Determine time_t on os:type()?
     lists:foreach(fun ({FI, Opts}) ->
-			 ok = ?PRIM_FILE_call(write_file_info, Handle, [Name, FI, Opts])
+			 ok = ?PRIM_FILE:write_file_info(Name, FI, Opts)
 		 end, [ {#file_info{ mode=8#400, atime = Time, mtime = Time, ctime = Time}, Opts} ||
 			  Opts <- [[{time, universal}],[{time, local}]],
 			  Time <- [
@@ -1050,11 +918,9 @@ file_write_file_info_opts(Config) when is_list(Config) ->
 				   {{2037,2,3},{23,59,59}},
 				   erlang:localtime()
 				  ]]),
-    ok   = ?PRIM_FILE:stop(Handle),
     ok.
 
 file_read_file_info_opts(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
     RootDir = get_good_directory(Config),
     io:format("RootDir = ~p", [RootDir]),
 
@@ -1063,41 +929,38 @@ file_read_file_info_opts(Config) when is_list(Config) ->
 
     lists:foreach(fun
 		      (Opts) ->
-			 {ok,_} = ?PRIM_FILE_call(read_file_info, Handle, [Name, Opts])
+			 {ok,_} = ?PRIM_FILE:read_file_info(Name, Opts)
 		 end, [[{time, Type}] || Type <- [local, universal, posix]]),
-    ok   = ?PRIM_FILE:stop(Handle),
     ok.
 
 %% Test the write and read back *_file_info/3 functions.
 
 file_write_read_file_info_opts(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
     RootDir = get_good_directory(Config),
     io:format("RootDir = ~p", [RootDir]),
 
     Name = filename:join(RootDir, atom_to_list(?MODULE) ++"_read_write_file_info_opts"),
     ok   = ?PRIM_FILE:write_file(Name, "hello_opts2"),
 
-    ok = file_write_read_file_info_opts(Handle, Name, {{1989, 04, 28}, {19,30,22}}, [{time, local}]),
-    ok = file_write_read_file_info_opts(Handle, Name, {{1989, 04, 28}, {19,30,22}}, [{time, universal}]),
+    ok = file_write_read_file_info_opts(Name, {{1989, 04, 28}, {19,30,22}}, [{time, local}]),
+    ok = file_write_read_file_info_opts(Name, {{1989, 04, 28}, {19,30,22}}, [{time, universal}]),
     %% will not work on platforms with unsigned time_t
-    %ok = file_write_read_file_info_opts(Handle, Name, {{1930, 04, 28}, {19,30,22}}, [{time, local}]),
-    %ok = file_write_read_file_info_opts(Handle, Name, {{1930, 04, 28}, {19,30,22}}, [{time, universal}]),
-    ok = file_write_read_file_info_opts(Handle, Name, 1, [{time, posix}]),
+    %ok = file_write_read_file_info_opts(Name, {{1930, 04, 28}, {19,30,22}}, [{time, local}]),
+    %ok = file_write_read_file_info_opts(Name, {{1930, 04, 28}, {19,30,22}}, [{time, universal}]),
+    ok = file_write_read_file_info_opts(Name, 1, [{time, posix}]),
     %% will not work on platforms with unsigned time_t
-    %ok = file_write_read_file_info_opts(Handle, Name, -1, [{time, posix}]),
-    %ok = file_write_read_file_info_opts(Handle, Name, -300000, [{time, posix}]),
-    ok = file_write_read_file_info_opts(Handle, Name, 300000, [{time, posix}]),
-    ok = file_write_read_file_info_opts(Handle, Name, 0, [{time, posix}]),
+    %ok = file_write_read_file_info_opts(Name, -1, [{time, posix}]),
+    %ok = file_write_read_file_info_opts(Name, -300000, [{time, posix}]),
+    ok = file_write_read_file_info_opts(Name, 300000, [{time, posix}]),
+    ok = file_write_read_file_info_opts(Name, 0, [{time, posix}]),
 
-    ok = ?PRIM_FILE:stop(Handle),
     ok.
 
-file_write_read_file_info_opts(Handle, Name, Mtime, Opts) ->
-    {ok, FI} = ?PRIM_FILE_call(read_file_info, Handle, [Name, Opts]),
+file_write_read_file_info_opts(Name, Mtime, Opts) ->
+    {ok, FI} = ?PRIM_FILE:read_file_info(Name, Opts),
     FI2 = FI#file_info{ mtime = Mtime },
-    ok = ?PRIM_FILE_call(write_file_info, Handle, [Name, FI2, Opts]),
-    {ok, FI3} = ?PRIM_FILE_call(read_file_info, Handle, [Name, Opts]),
+    ok = ?PRIM_FILE:write_file_info(Name, FI2, Opts),
+    {ok, FI3} = ?PRIM_FILE:read_file_info(Name, Opts),
     io:format("Expecting mtime = ~p, got ~p~n", [FI2#file_info.mtime, FI3#file_info.mtime]),
     FI2 = FI3,
     ok.
@@ -1175,8 +1038,8 @@ advise(Config) when is_list(Config) ->
 			   atom_to_list(?MODULE)
 			   ++"_advise.fil"),
 
-    Line1 = "Hello\n",
-    Line2 = "World!\n",
+    Line1 = <<"Hello\n">>,
+    Line2 = <<"World!\n">>,
 
     {ok, Fd} = ?PRIM_FILE:open(Advise, [write]),
     ok = ?PRIM_FILE:advise(Fd, 0, 0, normal),
@@ -1226,7 +1089,7 @@ advise(Config) when is_list(Config) ->
     {ok, Fd9} = ?PRIM_FILE:open(Advise, [read]),
     Offset = 0,
     %% same as a 0 length in some implementations
-    Length = length(Line1) + length(Line2),
+    Length = byte_size(Line1) + byte_size(Line2),
     ok = ?PRIM_FILE:advise(Fd9, Offset, Length, sequential),
     {ok, Line1} = ?PRIM_FILE:read_line(Fd9),
     {ok, Line2} = ?PRIM_FILE:read_line(Fd9),
@@ -1250,23 +1113,18 @@ do_large_write(Name) ->
     Chunk = <<0:ChunkSize/unit:8>>,
     Data = zip_data(lists:duplicate(Chunks, Chunk), Interleave),
     Size = Chunks * ChunkSize + Chunks,	% 4 G + 32
-    Wordsize = erlang:system_info(wordsize),
-    case prim_file:write_file(Name, Data) of
-	ok when Wordsize =:= 8 ->
-	    {ok,#file_info{size=Size}} = file:read_file_info(Name),
-	    {ok,Fd} = prim_file:open(Name, [read]),
-	    check_large_write(Fd, ChunkSize, 0, Interleave);
-	{error,einval} when Wordsize =:= 4 ->
-	    ok
-    end.
+    ok = ?PRIM_FILE:write_file(Name, Data),
+    {ok,#file_info{size=Size}} = file:read_file_info(Name),
+    {ok,Fd} = ?PRIM_FILE:open(Name, [read]),
+    check_large_write(Fd, ChunkSize, 0, Interleave).
 
 check_large_write(Fd, ChunkSize, Pos, [X|Interleave]) ->
     Pos1 = Pos + ChunkSize,
-    {ok,Pos1} = prim_file:position(Fd, {cur,ChunkSize}),
-    {ok,[X]} = prim_file:read(Fd, 1),
+    {ok,Pos1} = ?PRIM_FILE:position(Fd, {cur,ChunkSize}),
+    {ok,<<X>>} = ?PRIM_FILE:read(Fd, 1),
     check_large_write(Fd, ChunkSize, Pos1+1, Interleave);
 check_large_write(Fd, _, _, []) ->
-    eof = prim_file:read(Fd, 1),
+    eof = ?PRIM_FILE:read(Fd, 1),
     ok.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -1338,71 +1196,53 @@ allocate_and_assert(Fd, Offset, Length) ->
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-delete_a(Config) when is_list(Config) ->
-    delete(Config, [], "_a").
-
-delete_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = delete(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-delete(Config, Handle, Suffix) ->
+delete(Config) when is_list(Config) ->
     RootDir = proplists:get_value(priv_dir,Config),
     Name = filename:join(RootDir,
 			 atom_to_list(?MODULE)
-			 ++"_delete"++Suffix++".fil"),
+			 ++"_delete.fil"),
     {ok, Fd1} = ?PRIM_FILE:open(Name, [write]),
     ?PRIM_FILE:write(Fd1,"ok.\n"),
     ok = ?PRIM_FILE:close(Fd1),
     %% Check that the file is readable
     {ok, Fd2} = ?PRIM_FILE:open(Name, [read]),
     ok = ?PRIM_FILE:close(Fd2),
-    ok = ?PRIM_FILE_call(delete, Handle, [Name]),
+    ok = ?PRIM_FILE:delete(Name),
     %% Check that the file is not readable anymore
     {error, _} = ?PRIM_FILE:open(Name, [read]),
     %% Try deleting a nonexistent file
-    {error, enoent} = ?PRIM_FILE_call(delete, Handle, [Name]),
+    {error, enoent} = ?PRIM_FILE:delete(Name),
     ok.
 
-rename_a(Config) when is_list(Config) ->
-    rename(Config, [], "_a").
-
-rename_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = rename(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-rename(Config, Handle, Suffix) ->
+rename(Config) when is_list(Config) ->
     RootDir = proplists:get_value(priv_dir,Config),
-    FileName1 = atom_to_list(?MODULE)++"_rename"++Suffix++".fil",
-    FileName2 = atom_to_list(?MODULE)++"_rename"++Suffix++".ful",
+    FileName1 = atom_to_list(?MODULE)++"_rename.fil",
+    FileName2 = atom_to_list(?MODULE)++"_rename.ful",
     Name1 = filename:join(RootDir, FileName1),
     Name2 = filename:join(RootDir, FileName2),
     {ok,Fd1} = ?PRIM_FILE:open(Name1, [write]),
     ok = ?PRIM_FILE:close(Fd1),
     %% Rename, and check that it really changed name
-    ok = ?PRIM_FILE_call(rename, Handle, [Name1, Name2]),
+    ok = ?PRIM_FILE:rename(Name1, Name2),
     {error, _} = ?PRIM_FILE:open(Name1, [read]),
     {ok, Fd2} = ?PRIM_FILE:open(Name2, [read]),
     ok = ?PRIM_FILE:close(Fd2),
     %% Try renaming something to itself
-    ok = ?PRIM_FILE_call(rename, Handle, [Name2, Name2]),
+    ok = ?PRIM_FILE:rename(Name2, Name2),
     %% Try renaming something that doesn't exist
     {error, enoent} =
-	?PRIM_FILE_call(rename, Handle, [Name1, Name2]),
+	?PRIM_FILE:rename(Name1, Name2),
     %% Try renaming to something else than a string
     {error, badarg} =
-	?PRIM_FILE_call(rename, Handle, [Name1, foobar]),
+	?PRIM_FILE:rename(Name1, foobar),
 
     %% Move between directories
     DirName1 = filename:join(RootDir,
 			     atom_to_list(?MODULE)
-			     ++"_rename_dir"++Suffix),
+			     ++"_rename_dir"),
     DirName2 = filename:join(RootDir,
 			     atom_to_list(?MODULE)
-			     ++"_second_rename_dir"++Suffix),
+			     ++"_second_rename_dir"),
     Name1foo = filename:join(DirName1, "foo.fil"),
     Name2foo = filename:join(DirName2, "foo.fil"),
     Name2bar = filename:join(DirName2, "bar.dir"),
@@ -1410,21 +1250,21 @@ rename(Config, Handle, Suffix) ->
     %% The name has to include the full file name, path is not enough
     expect(
       {error, eexist}, {error, eisdir},
-      ?PRIM_FILE_call(rename, Handle, [Name2, DirName1])),
+      ?PRIM_FILE:rename(Name2, DirName1)),
     ok =
-	?PRIM_FILE_call(rename, Handle, [Name2, Name1foo]),
+	?PRIM_FILE:rename(Name2, Name1foo),
     %% Now rename the directory
-    ok = ?PRIM_FILE_call(rename, Handle, [DirName1, DirName2]),
+    ok = ?PRIM_FILE:rename(DirName1, DirName2),
     %% And check that the file is there now
     {ok,Fd3} = ?PRIM_FILE:open(Name2foo, [read]),
     ok = ?PRIM_FILE:close(Fd3),
     %% Try some dirty things now: move the directory into itself
     {error, Msg1} =
-	?PRIM_FILE_call(rename, Handle, [DirName2, Name2bar]),
+	?PRIM_FILE:rename(DirName2, Name2bar),
     io:format("Errmsg1: ~p",[Msg1]),
     %% move dir into a file in itself
     {error, Msg2} =
-	?PRIM_FILE_call(rename, Handle, [DirName2, Name2foo]),
+	?PRIM_FILE:rename(DirName2, Name2foo),
     io:format("Errmsg2: ~p",[Msg2]),
 
     ok.
@@ -1466,7 +1306,7 @@ e_delete(Config) when is_list(Config) ->
 	       Base, #file_info {mode=0}),
 	    {error, eacces} = ?PRIM_FILE:delete(Afile),
 	    ?PRIM_FILE:write_file_info(
-	       Base, #file_info {mode=8#600})
+	       Base, #file_info {mode=8#700})
     end,
 
     ok.
@@ -1602,7 +1442,7 @@ e_make_dir(Config) when is_list(Config) ->
 	    ?PRIM_FILE:write_file_info(Base, #file_info {mode=0}),
 	    {error, eacces} =
 		?PRIM_FILE:make_dir(filename:join(Base, "xxxx")),
-	    ?PRIM_FILE:write_file_info(Base, #file_info {mode=8#600})
+	    ?PRIM_FILE:write_file_info(Base, #file_info {mode=8#700})
     end,
     ok.
 
@@ -1652,170 +1492,24 @@ e_del_dir(Config) when is_list(Config) ->
 	    ?PRIM_FILE:write_file_info(Base, #file_info {mode=0}),
 	    {error, eacces} = ?PRIM_FILE:del_dir(ADirectory),
 	    ?PRIM_FILE:write_file_info(
-	       Base, #file_info {mode=8#600})
-    end,
-    ok.
-
-
-%% Trying reading and positioning from a compressed file.
-
-read_compressed(Config) when is_list(Config) ->
-    Data = proplists:get_value(data_dir, Config),
-    Real = filename:join(Data, "realmen.html.gz"),
-    {ok, Fd} = ?PRIM_FILE:open(Real, [read, compressed]),
-    try_read_file(Fd).
-
-%% Trying reading and positioning from an uncompressed file,
-%% but with the compressed flag given.
-
-read_not_really_compressed(Config) when is_list(Config) ->
-    Data = proplists:get_value(data_dir, Config),
-    Priv = proplists:get_value(priv_dir, Config),
-
-    %% The file realmen.html might have got CRs added (by WinZip).
-    %% Remove them, or the file positions will not be correct.
-
-    Real = filename:join(Data, "realmen.html"),
-    RealPriv = filename:join(Priv,
-			     atom_to_list(?MODULE)++"_realmen.html"),
-    {ok, RealDataBin} = ?PRIM_FILE:read_file(Real),
-    RealData = remove_crs(binary_to_list(RealDataBin), []),
-    ok = ?PRIM_FILE:write_file(RealPriv, RealData),
-    {ok, Fd} = ?PRIM_FILE:open(RealPriv, [read, compressed]),
-    try_read_file(Fd).
-
-remove_crs([$\r|Rest], Result) ->
-    remove_crs(Rest, Result);
-remove_crs([C|Rest], Result) ->
-    remove_crs(Rest, [C|Result]);
-remove_crs([], Result) ->
-    lists:reverse(Result).
-
-try_read_file(Fd) ->
-    %% Seek to the current position (nothing should happen).
-
-    {ok, 0} = ?PRIM_FILE:position(Fd, 0),
-    {ok, 0} = ?PRIM_FILE:position(Fd, {cur, 0}),
-
-    %% Read a few lines from a compressed file.
-
-    ShouldBe = "<TITLE>Real Programmers Don't Use PASCAL</TITLE>\n",
-    {ok, ShouldBe} = ?PRIM_FILE:read(Fd, length(ShouldBe)),
-
-    %% Now seek forward.
-
-    {ok, 381} = ?PRIM_FILE:position(Fd, 381),
-    Back = "Back in the good old days -- the \"Golden Era\" " ++
-	"of computers, it was\n",
-    {ok, Back} = ?PRIM_FILE:read(Fd, length(Back)),
-
-    %% Try to search forward relative to the current position.
-
-    {ok, CurPos} = ?PRIM_FILE:position(Fd, {cur, 0}),
-    RealPos = 4273,
-    {ok, RealPos} = ?PRIM_FILE:position(Fd, {cur, RealPos-CurPos}),
-    RealProg = "<LI> Real Programmers aren't afraid to use GOTOs.\n",
-    {ok, RealProg} = ?PRIM_FILE:read(Fd, length(RealProg)),
-
-    %% Seek backward.
-
-    AfterTitle = length("<TITLE>"),
-    {ok, AfterTitle} = ?PRIM_FILE:position(Fd, AfterTitle),
-    Title = "Real Programmers Don't Use PASCAL</TITLE>\n",
-    {ok, Title} = ?PRIM_FILE:read(Fd, length(Title)),
-
-    %% Done.
-
-    ?PRIM_FILE:close(Fd),
-    ok.
-
-write_compressed(Config) when is_list(Config) ->
-    Priv = proplists:get_value(priv_dir, Config),
-    MyFile = filename:join(Priv,
-			   atom_to_list(?MODULE)++"_test.gz"),
-
-    %% Write a file.
-
-    {ok, Fd} = ?PRIM_FILE:open(MyFile, [write, compressed]),
-    {ok, 0} = ?PRIM_FILE:position(Fd, 0),
-    Prefix = "hello\n",
-    End = "end\n",
-    ok = ?PRIM_FILE:write(Fd, Prefix),
-    {ok, 143} = ?PRIM_FILE:position(Fd, 143),
-    ok = ?PRIM_FILE:write(Fd, End),
-    ok = ?PRIM_FILE:close(Fd),
-
-    %% Read the file and verify the contents.
-
-    {ok, Fd1} = ?PRIM_FILE:open(MyFile, [read, compressed]),
-    {ok, Prefix} = ?PRIM_FILE:read(Fd1, length(Prefix)),
-    Second = lists:duplicate(143-length(Prefix), 0) ++ End,
-    {ok, Second} = ?PRIM_FILE:read(Fd1, length(Second)),
-    ok = ?PRIM_FILE:close(Fd1),
-
-    %% Ensure that the file is compressed.
-
-    TotalSize = 143 + length(End),
-    case ?PRIM_FILE:read_file_info(MyFile) of
-	{ok, #file_info{size=Size}} when Size < TotalSize ->
-	    ok;
-	{ok, #file_info{size=Size}} when Size == TotalSize ->
-	    ct:fail(file_not_compressed)
+	       Base, #file_info {mode=8#700})
     end,
-
-    %% Write again to ensure that the file is truncated.
-
-    {ok, Fd2} = ?PRIM_FILE:open(MyFile, [write, compressed]),
-    NewString = "aaaaaaaaaaa",
-    ok = ?PRIM_FILE:write(Fd2, NewString),
-    ok = ?PRIM_FILE:close(Fd2),
-    {ok, Fd3} = ?PRIM_FILE:open(MyFile, [read, compressed]),
-    {ok, NewString} = ?PRIM_FILE:read(Fd3, 1024),
-    ok = ?PRIM_FILE:close(Fd3),
-
-    ok.
-
-compress_errors(Config) when is_list(Config) ->
-    Data = proplists:get_value(data_dir, Config),
-    {error, enoent} = ?PRIM_FILE:open("non_existing__",
-				      [compressed, read]),
-    {error, einval} = ?PRIM_FILE:open("non_existing__",
-				      [compressed, read, write]),
-
-    %% Read a corrupted .gz file.
-
-    Corrupted = filename:join(Data, "corrupted.gz"),
-    {ok, Fd} = ?PRIM_FILE:open(Corrupted, [read, compressed]),
-    {error, eio} = ?PRIM_FILE:read(Fd, 100),
-    ?PRIM_FILE:close(Fd),
-
     ok.
 
 
-%% Test creating a hard link.
-make_link_a(Config) when is_list(Config) ->
-    make_link(Config, [], "_a").
-
-%% Test creating a hard link.
-make_link_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = make_link(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-make_link(Config, Handle, Suffix) ->
+make_link(Config) when is_list(Config) ->
     RootDir = proplists:get_value(priv_dir, Config),
     NewDir = filename:join(RootDir,
 			   atom_to_list(?MODULE)
-			   ++"_make_link"++Suffix),
-    ok = ?PRIM_FILE_call(make_dir, Handle, [NewDir]),
+			   ++"_make_link"),
+    ok = ?PRIM_FILE:make_dir(NewDir),
 
     Name = filename:join(NewDir, "a_file"),
     ok = ?PRIM_FILE:write_file(Name, "some contents\n"),
 
     Alias = filename:join(NewDir, "an_alias"),
     Result =
-	case ?PRIM_FILE_call(make_link, Handle, [Name, Alias]) of
+	case ?PRIM_FILE:make_link(Name, Alias) of
 	    {error, enotsup} ->
 		{skipped, "Links not supported on this platform"};
 	    ok ->
@@ -1826,12 +1520,12 @@ make_link(Config, Handle, Suffix) ->
 		%% since they are not used on symbolic links.
 
 		{ok, Info} =
-		    ?PRIM_FILE_call(read_link_info, Handle, [Name]),
+		    ?PRIM_FILE:read_link_info(Name),
 		{ok, Info} =
-		    ?PRIM_FILE_call(read_link_info, Handle, [Alias]),
+		    ?PRIM_FILE:read_link_info(Alias),
 		#file_info{links = 2, type = regular} = Info,
 		{error, eexist} =
-		    ?PRIM_FILE_call(make_link, Handle, [Name, Alias]),
+		    ?PRIM_FILE:make_link(Name, Alias),
 		ok
 	end,
 
@@ -1843,30 +1537,19 @@ read_link_info_for_non_link(Config) when is_list(Config) ->
     {ok, #file_info{type=directory}} = ?PRIM_FILE:read_link_info("."),
     ok.
 
-%% Test operations on symbolic links (for Unix).
-symlinks_a(Config) when is_list(Config) ->
-    symlinks(Config, [], "_a").
-
-%% Test operations on symbolic links (for Unix).
-symlinks_b(Config) when is_list(Config) ->
-    {ok, Handle} = ?PRIM_FILE:start(),
-    Result = symlinks(Config, Handle, "_b"),
-    ok = ?PRIM_FILE:stop(Handle),
-    Result.
-
-symlinks(Config, Handle, Suffix) ->
+symlinks(Config) when is_list(Config)  ->
     RootDir = proplists:get_value(priv_dir, Config),
     NewDir = filename:join(RootDir,
 			   atom_to_list(?MODULE)
-			   ++"_make_symlink"++Suffix),
-    ok = ?PRIM_FILE_call(make_dir, Handle, [NewDir]),
+			   ++"_make_symlink"),
+    ok = ?PRIM_FILE:make_dir(NewDir),
 
     Name = filename:join(NewDir, "a_plain_file"),
     ok = ?PRIM_FILE:write_file(Name, "some stupid content\n"),
 
     Alias = filename:join(NewDir, "a_symlink_alias"),
     Result =
-	case ?PRIM_FILE_call(make_symlink, Handle, [Name, Alias]) of
+	case ?PRIM_FILE:make_symlink(Name, Alias) of
 	    {error, enotsup} ->
 		{skipped, "Links not supported on this platform"};
 	    {error, eperm} ->
@@ -1874,20 +1557,20 @@ symlinks(Config, Handle, Suffix) ->
 		{skipped, "Windows user not privileged to create links"};
 	    ok ->
 		{ok, Info1} =
-		    ?PRIM_FILE_call(read_file_info, Handle, [Name]),
+		    ?PRIM_FILE:read_file_info(Name),
 		{ok, Info1} =
-		    ?PRIM_FILE_call(read_file_info, Handle, [Alias]),
+		    ?PRIM_FILE:read_file_info(Alias),
 		{ok, Info1} =
-		    ?PRIM_FILE_call(read_link_info, Handle, [Name]),
+		    ?PRIM_FILE:read_link_info(Name),
 		#file_info{links = 1, type = regular} = Info1,
 
 		{ok, Info2} =
-		    ?PRIM_FILE_call(read_link_info, Handle, [Alias]),
+		    ?PRIM_FILE:read_link_info(Alias),
 		#file_info{links=1, type=symlink} = Info2,
 		{ok, Name} =
-		    ?PRIM_FILE_call(read_link, Handle, [Alias]),
+		    ?PRIM_FILE:read_link(Alias),
 		{ok, Name} =
-		    ?PRIM_FILE_call(read_link_all, Handle, [Alias]),
+		    ?PRIM_FILE:read_link_all(Alias),
 		%% If all is good, delete dir again (avoid hanging dir on windows)
 		rm_rf(?PRIM_FILE,NewDir),
 		ok
@@ -1907,10 +1590,9 @@ list_dir_limit(Config) when is_list(Config) ->
     RootDir = proplists:get_value(priv_dir, Config),
     NewDir = filename:join(RootDir,
 			   atom_to_list(?MODULE)++"_list_dir_limit"),
-    {ok, Handle1} = ?PRIM_FILE:start(),
-    ok = ?PRIM_FILE_call(make_dir, Handle1, [NewDir]),
+    ok = ?PRIM_FILE:make_dir(NewDir),
     Ref = erlang:start_timer(MaxTime*1000, self(), []),
-    Result = list_dir_limit_loop(NewDir, Handle1, Ref, MaxNumber, 0),
+    Result = list_dir_limit_loop(NewDir, Ref, MaxNumber, 0),
     Time = case erlang:cancel_timer(Ref) of
 	       false -> MaxTime;
 	       T -> MaxTime - (T div 1000)
@@ -1920,21 +1602,18 @@ list_dir_limit(Config) when is_list(Config) ->
 		 {error, _Reason, N} -> N;
 		 _ -> 0
 	     end,
-    {ok, Handle2} = ?PRIM_FILE:start(),
-    list_dir_limit_cleanup(NewDir, Handle2, Number, 0),
-    ok = ?PRIM_FILE:stop(Handle1),
-    ok = ?PRIM_FILE:stop(Handle2),
+    list_dir_limit_cleanup(NewDir, Number, 0),
     {ok, Number} = Result,
     {comment, 
      "Created " ++ integer_to_list(Number) ++ " files in " 
      ++ integer_to_list(Time) ++ " seconds."}.
 
-list_dir_limit_loop(Dir, Handle, _Ref, N, Cnt) when Cnt >= N ->
-    list_dir_check(Dir, Handle, Cnt);
-list_dir_limit_loop(Dir, Handle, Ref, N, Cnt) ->
+list_dir_limit_loop(Dir, _Ref, N, Cnt) when Cnt >= N ->
+    list_dir_check(Dir, Cnt);
+list_dir_limit_loop(Dir, Ref, N, Cnt) ->
     receive 
 	{timeout, Ref, []} -> 
-	    list_dir_check(Dir, Handle, Cnt)
+	    list_dir_check(Dir, Cnt)
     after 0 ->
 	    Name = integer_to_list(Cnt),
 	    case ?PRIM_FILE:write_file(filename:join(Dir, Name), Name) of
@@ -1942,23 +1621,23 @@ list_dir_limit_loop(Dir, Handle, Ref, N, Cnt) ->
 		    Next = Cnt + 1,
 		    case Cnt rem 100 of
 			0 ->
-			    case list_dir_check(Dir, Handle, Next) of
+			    case list_dir_check(Dir, Next) of
 				{ok, Next} ->
 				    list_dir_limit_loop(
-				      Dir, Handle, Ref, N, Next);
+				      Dir, Ref, N, Next);
 				Other ->
 				    Other
 			    end;
 			_ ->
-			    list_dir_limit_loop(Dir, Handle, Ref, N, Next)
+			    list_dir_limit_loop(Dir, Ref, N, Next)
 		    end;
 		{error, Reason} ->
 		    {error, Reason, Cnt}
 	    end
     end.
 
-list_dir_check(Dir, Handle, Cnt) ->
-    case ?PRIM_FILE:list_dir(Handle, Dir) of
+list_dir_check(Dir, Cnt) ->
+    case ?PRIM_FILE:list_dir(Dir) of
 	{ok, ListDir} ->
 	    case length(ListDir) of
 		Cnt ->
@@ -1975,18 +1654,18 @@ list_dir_check(Dir, Handle, Cnt) ->
 %% Deletes N files while ignoring errors, then continues deleting
 %% as long as they exist.
 
-list_dir_limit_cleanup(Dir, Handle, N, Cnt) when Cnt >= N ->
+list_dir_limit_cleanup(Dir, N, Cnt) when Cnt >= N ->
     Name = integer_to_list(Cnt),
-    case ?PRIM_FILE:delete(Handle, filename:join(Dir, Name)) of
+    case ?PRIM_FILE:delete(filename:join(Dir, Name)) of
 	ok ->
-	    list_dir_limit_cleanup(Dir, Handle, N, Cnt+1);
+	    list_dir_limit_cleanup(Dir, N, Cnt+1);
 	_ ->
 	    ok
     end;
-list_dir_limit_cleanup(Dir, Handle, N, Cnt) ->
+list_dir_limit_cleanup(Dir, N, Cnt) ->
     Name = integer_to_list(Cnt),
-    ?PRIM_FILE:delete(Handle, filename:join(Dir, Name)),
-    list_dir_limit_cleanup(Dir, Handle, N, Cnt+1).
+    ?PRIM_FILE:delete(filename:join(Dir, Name)),
+    list_dir_limit_cleanup(Dir, N, Cnt+1).
 
 %%%
 %%% Test list_dir() on a non-existing pathname.
@@ -1995,7 +1674,7 @@ list_dir_limit_cleanup(Dir, Handle, N, Cnt) ->
 list_dir_error(Config) ->
     Priv = proplists:get_value(priv_dir, Config),
     NonExisting = filename:join(Priv, "non-existing-dir"),
-    {error,enoent} = prim_file:list_dir(NonExisting),
+    {error,enoent} = ?PRIM_FILE:list_dir(NonExisting),
     ok.
 
 %%%
@@ -2063,7 +1742,7 @@ do_run_large_file_test(Config, Run, Name0) ->
 		      {'DOWN',Mref,_,_,_} -> ok;
 		      {Tester,done} -> ok
 		  end,
-		  prim_file:delete(Name)
+		  ?PRIM_FILE:delete(Name)
 	  end),
 
     %% Run the test case.
@@ -2108,12 +1787,25 @@ free_memory() ->
 		       {value, {buffered_memory, Buffed}} -> Buffed;
 		       false -> 0
 		   end),
-	TotFree div (1024*1024)
+	usable_mem(TotFree) div (1024*1024)
     catch
 	error : undef ->
 	    ct:fail({"os_mon not built"})
     end.
 
+usable_mem(Memory) ->
+    case test_server:is_valgrind() of
+        true ->
+            %% Valgrind uses extra memory for the V- and A-bits.
+            %% http://valgrind.org/docs/manual/mc-manual.html#mc-manual.value
+            %% Docs says it uses "compression to represent the V bits compactly"
+            %% but let's be conservative and cut usable memory in half.
+            Memory div 2;
+        false ->
+            Memory
+    end.
+
+
 %%%-----------------------------------------------------------------
 %%% Utilities
 rm_rf(Mod,Dir) ->
diff --git a/lib/kernel/test/sendfile_SUITE.erl b/lib/kernel/test/sendfile_SUITE.erl
index bfa564c32c..0c0b1cbcb6 100644
--- a/lib/kernel/test/sendfile_SUITE.erl
+++ b/lib/kernel/test/sendfile_SUITE.erl
@@ -23,30 +23,41 @@
 -include_lib("common_test/include/ct.hrl").
 -include_lib("kernel/include/file.hrl").
 
--compile(export_all).
-
-all() -> [{group,async_threads},
-	  {group,no_async_threads}].
-
-groups() ->
-    [{async_threads,[],tcs()},
-     {no_async_threads,[],tcs()}].
-
-tcs() ->
-    [t_sendfile_small
-     ,t_sendfile_big_all
-     ,t_sendfile_big_size
-     ,t_sendfile_many_small
-     ,t_sendfile_partial
-     ,t_sendfile_offset
-     ,t_sendfile_sendafter
-     ,t_sendfile_recvafter
-     ,t_sendfile_recvafter_remoteclose
-     ,t_sendfile_sendduring
-     ,t_sendfile_recvduring
-     ,t_sendfile_closeduring
-     ,t_sendfile_crashduring
-    ].
+-export([all/0, init_per_suite/1, end_per_suite/1, init_per_testcase/2]).
+
+-export([sendfile_server/2, sendfile_do_recv/2, init/1, handle_event/2]).
+
+-export(
+    [t_sendfile_small/1,
+     t_sendfile_big_all/1,
+     t_sendfile_big_size/1,
+     t_sendfile_many_small/1,
+     t_sendfile_partial/1,
+     t_sendfile_offset/1,
+     t_sendfile_sendafter/1,
+     t_sendfile_recvafter/1,
+     t_sendfile_recvafter_remoteclose/1,
+     t_sendfile_sendduring/1,
+     t_sendfile_recvduring/1,
+     t_sendfile_closeduring/1,
+     t_sendfile_crashduring/1,
+     t_sendfile_arguments/1]).
+
+all() ->
+    [t_sendfile_small,
+     t_sendfile_big_all,
+     t_sendfile_big_size,
+     t_sendfile_many_small,
+     t_sendfile_partial,
+     t_sendfile_offset,
+     t_sendfile_sendafter,
+     t_sendfile_recvafter,
+     t_sendfile_recvafter_remoteclose,
+     t_sendfile_sendduring,
+     t_sendfile_recvduring,
+     t_sendfile_closeduring,
+     t_sendfile_crashduring,
+     t_sendfile_arguments].
 
 init_per_suite(Config) ->
     case {os:type(),os:version()} of
@@ -72,28 +83,18 @@ init_per_suite(Config) ->
 end_per_suite(Config) ->
     file:delete(proplists:get_value(big_file, Config)).
 
-init_per_group(async_threads,Config) ->
-    case erlang:system_info(thread_pool_size) of
-	0 ->
-	    {skip,"No async threads"};
-	_ ->
-	    [{sendfile_opts,[{use_threads,true}]}|Config]
-    end;
-init_per_group(no_async_threads,Config) ->
-    [{sendfile_opts,[{use_threads,false}]}|Config].
-
-end_per_group(_,_Config) ->
-    ok.
-
 init_per_testcase(TC,Config) when TC == t_sendfile_recvduring;
 				  TC == t_sendfile_sendduring ->
     Filename = proplists:get_value(small_file, Config),
 
     Send = fun(Sock) ->
 		   {_Size, Data} = sendfile_file_info(Filename),
-		   {ok,D} = file:open(Filename, [raw,binary,read]),
-		   prim_file:sendfile(D, Sock, 0, 0, 0,
-				      [],[],[]),
+		   {ok,Fd} = file:open(Filename, [raw,binary,read]),
+                   %% Determine whether the driver has native support by
+                   %% hitting the raw module directly; file:sendfile/5 will
+                   %% land in the fallback if it doesn't.
+                   RawModule = Fd#file_descriptor.module,
+                   {ok, _Ignored} = RawModule:sendfile(Fd,Sock,0,0,0,[],[],[]),
 		   Data
 	   end,
 
@@ -105,9 +106,8 @@ init_per_testcase(TC,Config) when TC == t_sendfile_recvduring;
 	    ct:log("Error: ~p",[Error]),
 	    {skip,"Not supported"}
     end;
-init_per_testcase(_Tc,Config) ->
-    Config ++ [{sendfile_opts,[{use_threads,false}]}].
-
+init_per_testcase(_TC,Config) ->
+    Config.
 
 t_sendfile_small(Config) when is_list(Config) ->
     Filename = proplists:get_value(small_file, Config),
@@ -124,7 +124,7 @@ t_sendfile_small(Config) when is_list(Config) ->
 t_sendfile_many_small(Config) when is_list(Config) ->
     Filename = proplists:get_value(small_file, Config),
     FileOpts = proplists:get_value(file_opts, Config, []),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     error_logger:add_report_handler(?MODULE,[self()]),
 
@@ -151,7 +151,7 @@ t_sendfile_many_small(Config) when is_list(Config) ->
 
 t_sendfile_big_all(Config) when is_list(Config) ->
     Filename = proplists:get_value(big_file, Config),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     Send = fun(Sock) ->
 		   {ok, #file_info{size = Size}} =
@@ -165,7 +165,7 @@ t_sendfile_big_all(Config) when is_list(Config) ->
 t_sendfile_big_size(Config) ->
     Filename = proplists:get_value(big_file, Config),
     FileOpts = proplists:get_value(file_opts, Config, []),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     SendAll = fun(Sock) ->
 		      {ok, #file_info{size = Size}} =
@@ -180,7 +180,7 @@ t_sendfile_big_size(Config) ->
 t_sendfile_partial(Config) ->
     Filename = proplists:get_value(small_file, Config),
     FileOpts = proplists:get_value(file_opts, Config, []),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     SendSingle = fun(Sock) ->
 			 {_Size, <<Data:5/binary,_/binary>>} =
@@ -217,7 +217,7 @@ t_sendfile_partial(Config) ->
 t_sendfile_offset(Config) ->
     Filename = proplists:get_value(small_file, Config),
     FileOpts = proplists:get_value(file_opts, Config, []),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     Send = fun(Sock) ->
 		   {_Size, <<_:5/binary,Data:3/binary,_/binary>> = AllData} =
@@ -233,7 +233,7 @@ t_sendfile_offset(Config) ->
 
 t_sendfile_sendafter(Config) ->
     Filename = proplists:get_value(small_file, Config),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     Send = fun(Sock) ->
 		   {Size, Data} = sendfile_file_info(Filename),
@@ -246,7 +246,7 @@ t_sendfile_sendafter(Config) ->
 
 t_sendfile_recvafter(Config) ->
     Filename = proplists:get_value(small_file, Config),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     Send = fun(Sock) ->
 		   {Size, Data} = sendfile_file_info(Filename),
@@ -279,7 +279,7 @@ t_sendfile_recvafter_remoteclose(Config) ->
 
 t_sendfile_sendduring(Config) ->
     Filename = proplists:get_value(big_file, Config),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     Send = fun(Sock) ->
 		   {ok, #file_info{size = Size}} =
@@ -296,7 +296,7 @@ t_sendfile_sendduring(Config) ->
 
 t_sendfile_recvduring(Config) ->
     Filename = proplists:get_value(big_file, Config),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     Send = fun(Sock) ->
 		   {ok, #file_info{size = Size}} =
@@ -315,7 +315,7 @@ t_sendfile_recvduring(Config) ->
 
 t_sendfile_closeduring(Config) ->
     Filename = proplists:get_value(big_file, Config),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     Send = fun(Sock,SFServPid) ->
 		   spawn_link(fun() ->
@@ -345,7 +345,7 @@ t_sendfile_closeduring(Config) ->
 
 t_sendfile_crashduring(Config) ->
     Filename = proplists:get_value(big_file, Config),
-    SendfileOpts = proplists:get_value(sendfile_opts, Config),
+    SendfileOpts = proplists:get_value(sendfile_opts, Config, []),
 
     error_logger:add_report_handler(?MODULE,[self()]),
 
@@ -373,6 +373,36 @@ t_sendfile_crashduring(Config) ->
 		end
 	end.
 
+t_sendfile_arguments(Config) ->
+    Filename = proplists:get_value(small_file, Config),
+
+    {ok, Listener} = gen_tcp:listen(0,
+        [{packet, 0}, {active, false}, {reuseaddr, true}]),
+    {ok, Port} = inet:port(Listener),
+
+    ErrorCheck =
+        fun(Reason, Offset, Length, Opts) ->
+            {ok, Sender} = gen_tcp:connect({127, 0, 0, 1}, Port,
+                [{packet, 0}, {active, false}]),
+            {ok, Receiver} = gen_tcp:accept(Listener),
+            {ok, Fd} = file:open(Filename, [read, raw]),
+            {error, Reason} = file:sendfile(Fd, Sender, Offset, Length, Opts),
+            gen_tcp:close(Receiver),
+            gen_tcp:close(Sender),
+            file:close(Fd)
+        end,
+
+    ErrorCheck(einval, -1, 0, []),
+    ErrorCheck(einval, 0, -1, []),
+    ErrorCheck(badarg, gurka, 0, []),
+    ErrorCheck(badarg, 0, gurka, []),
+    ErrorCheck(badarg, 0, 0, gurka),
+    ErrorCheck(badarg, 0, 0, [{chunk_size, gurka}]),
+
+    gen_tcp:close(Listener),
+
+    ok.
+
 %% Generic sendfile server code
 sendfile_send(Send) ->
     sendfile_send({127,0,0,1},Send).
diff --git a/lib/kernel/test/seq_trace_SUITE.erl b/lib/kernel/test/seq_trace_SUITE.erl
index be23a1933f..aae8a83304 100644
--- a/lib/kernel/test/seq_trace_SUITE.erl
+++ b/lib/kernel/test/seq_trace_SUITE.erl
@@ -25,7 +25,7 @@
 -export([token_set_get/1, tracer_set_get/1, print/1,
 	 send/1, distributed_send/1, recv/1, distributed_recv/1,
 	 trace_exit/1, distributed_exit/1, call/1, port/1,
-	 match_set_seq_token/1, gc_seq_token/1]).
+	 match_set_seq_token/1, gc_seq_token/1, label_capability_mismatch/1]).
 
 %% internal exports
 -export([simple_tracer/2, one_time_receiver/0, one_time_receiver/1,
@@ -47,7 +47,7 @@ all() ->
     [token_set_get, tracer_set_get, print, send,
      distributed_send, recv, distributed_recv, trace_exit,
      distributed_exit, call, port, match_set_seq_token,
-     gc_seq_token].
+     gc_seq_token, label_capability_mismatch].
 
 groups() -> 
     [].
@@ -90,8 +90,8 @@ do_token_set_get(TsType) ->
     %% Test that initial seq_trace is disabled
     [] = seq_trace:get_token(),
     %% Test setting and reading the different fields
-    0 = seq_trace:set_token(label,17),
-    {label,17} = seq_trace:get_token(label),
+    0 = seq_trace:set_token(label,{my_label,1}),
+    {label,{my_label,1}} = seq_trace:get_token(label),
     false = seq_trace:set_token(print,true),
     {print,true} = seq_trace:get_token(print),
     false = seq_trace:set_token(send,true),
@@ -101,12 +101,12 @@ do_token_set_get(TsType) ->
     false = seq_trace:set_token(TsType,true),
     {TsType,true} = seq_trace:get_token(TsType),
     %% Check the whole token
-    {Flags,17,0,Self,0} = seq_trace:get_token(), % all flags are set
+    {Flags,{my_label,1},0,Self,0} = seq_trace:get_token(), % all flags are set
     %% Test setting and reading the 'serial' field
     {0,0} = seq_trace:set_token(serial,{3,5}),
     {serial,{3,5}} = seq_trace:get_token(serial),
     %% Check the whole token, test that a whole token can be set and get
-    {Flags,17,5,Self,3} = seq_trace:get_token(),
+    {Flags,{my_label,1},5,Self,3} = seq_trace:get_token(),
     seq_trace:set_token({Flags,19,7,Self,5}),
     {Flags,19,7,Self,5} = seq_trace:get_token(),
     %% Check that receive timeout does not reset token
@@ -166,11 +166,13 @@ do_send(TsType) ->
     seq_trace:reset_trace(),
     start_tracer(),
     Receiver = spawn(?MODULE,one_time_receiver,[]),
+    Label = make_ref(),
+    seq_trace:set_token(label,Label),
     set_token_flags([send, TsType]),
     Receiver ! send,
     Self = self(),
     seq_trace:reset_trace(),
-    [{0,{send,_,Self,Receiver,send}, Ts}] = stop_tracer(1),
+    [{Label,{send,_,Self,Receiver,send}, Ts}] = stop_tracer(1),
     check_ts(TsType, Ts).
 
 distributed_send(Config) when is_list(Config) ->
@@ -184,14 +186,19 @@ do_distributed_send(TsType) ->
     seq_trace:reset_trace(),
     start_tracer(),
     Receiver = spawn(Node,?MODULE,one_time_receiver,[]),
+
+    %% Make sure complex labels survive the trip.
+    Label = make_ref(),
+    seq_trace:set_token(label,Label),
     set_token_flags([send,TsType]),
+
     Receiver ! send,
     Self = self(),
     seq_trace:reset_trace(),
     stop_node(Node),
-    [{0,{send,_,Self,Receiver,send}, Ts}] = stop_tracer(1),
+    [{Label,{send,_,Self,Receiver,send}, Ts}] = stop_tracer(1),
     check_ts(TsType, Ts).
-    
+
 
 recv(Config) when is_list(Config) ->
     lists:foreach(fun do_recv/1, ?TIMESTAMP_MODES).
@@ -220,7 +227,12 @@ do_distributed_recv(TsType) ->
     seq_trace:reset_trace(),
     rpc:call(Node,?MODULE,start_tracer,[]),
     Receiver = spawn(Node,?MODULE,one_time_receiver,[]),
+
+    %% Make sure complex labels survive the trip.
+    Label = make_ref(),
+    seq_trace:set_token(label,Label),
     set_token_flags(['receive',TsType]),
+
     Receiver ! 'receive',
     %% let the other process receive the message:
     receive after 1 -> ok end,
@@ -229,7 +241,7 @@ do_distributed_recv(TsType) ->
     Result = rpc:call(Node,?MODULE,stop_tracer,[1]),
     stop_node(Node),
     ok = io:format("~p~n",[Result]),
-    [{0,{'receive',_,Self,Receiver,'receive'}, Ts}] = Result,
+    [{Label,{'receive',_,Self,Receiver,'receive'}, Ts}] = Result,
     check_ts(TsType, Ts).
 
 trace_exit(Config) when is_list(Config) ->
@@ -240,7 +252,12 @@ do_trace_exit(TsType) ->
     start_tracer(),
     Receiver = spawn_link(?MODULE, one_time_receiver, [exit]),
     process_flag(trap_exit, true),
+
+    %% Make sure complex labels survive the trip.
+    Label = make_ref(),
+    seq_trace:set_token(label,Label),
     set_token_flags([send, TsType]),
+
     Receiver ! {before, exit},
     %% let the other process receive the message:
     receive
@@ -254,8 +271,8 @@ do_trace_exit(TsType) ->
     Result = stop_tracer(2),
     seq_trace:reset_trace(),
     ok = io:format("~p~n", [Result]),
-    [{0, {send, {0,1}, Self, Receiver, {before, exit}}, Ts0},
-	   {0, {send, {1,2}, Receiver, Self,
+    [{Label, {send, {0,1}, Self, Receiver, {before, exit}}, Ts0},
+	   {Label, {send, {1,2}, Receiver, Self,
 	       {'EXIT', Receiver, {exit, {before, exit}}}}, Ts1}] = Result,
     check_ts(TsType, Ts0),
     check_ts(TsType, Ts1).
@@ -291,6 +308,74 @@ do_distributed_exit(TsType) ->
 		{'EXIT', Receiver, {exit, {before, exit}}}}, Ts}] = Result,
     check_ts(TsType, Ts).
 
+label_capability_mismatch(Config) when is_list(Config) ->
+    Releases = ["20_latest"],
+    Available = [Rel || Rel <- Releases, test_server:is_release_available(Rel)],
+    case Available of
+        [] -> {skipped, "No incompatible releases available"};
+        _ ->
+            lists:foreach(fun do_incompatible_labels/1, Available),
+            lists:foreach(fun do_compatible_labels/1, Available),
+            ok
+    end.
+
+do_incompatible_labels(Rel) ->
+    Cookie = atom_to_list(erlang:get_cookie()),
+    {ok, Node} = test_server:start_node(
+        list_to_atom(atom_to_list(?MODULE)++"_"++Rel), peer,
+        [{args, " -setcookie "++Cookie}, {erl, [{release, Rel}]}]),
+
+    {_,Dir} = code:is_loaded(?MODULE),
+    Mdir = filename:dirname(Dir),
+    true = rpc:call(Node,code,add_patha,[Mdir]),
+    seq_trace:reset_trace(),
+    rpc:call(Node,?MODULE,start_tracer,[]),
+    Receiver = spawn(Node,?MODULE,one_time_receiver,[]),
+
+    %% This node does not support arbitrary labels, so it must fail with a
+    %% timeout as the token is dropped silently.
+    seq_trace:set_token(label,make_ref()),
+    seq_trace:set_token('receive',true),
+
+    Receiver ! 'receive',
+    %% let the other process receive the message:
+    receive after 10 -> ok end,
+    seq_trace:reset_trace(),
+
+    {error,timeout} = rpc:call(Node,?MODULE,stop_tracer,[1]),
+    stop_node(Node),
+    ok.
+
+do_compatible_labels(Rel) ->
+    Cookie = atom_to_list(erlang:get_cookie()),
+    {ok, Node} = test_server:start_node(
+        list_to_atom(atom_to_list(?MODULE)++"_"++Rel), peer,
+        [{args, " -setcookie "++Cookie}, {erl, [{release, Rel}]}]),
+
+    {_,Dir} = code:is_loaded(?MODULE),
+    Mdir = filename:dirname(Dir),
+    true = rpc:call(Node,code,add_patha,[Mdir]),
+    seq_trace:reset_trace(),
+    rpc:call(Node,?MODULE,start_tracer,[]),
+    Receiver = spawn(Node,?MODULE,one_time_receiver,[]),
+
+    %% This node does not support arbitrary labels, but small integers should
+    %% still work.
+    Label = 1234,
+    seq_trace:set_token(label,Label),
+    seq_trace:set_token('receive',true),
+
+    Receiver ! 'receive',
+    %% let the other process receive the message:
+    receive after 10 -> ok end,
+    Self = self(),
+    seq_trace:reset_trace(),
+    Result = rpc:call(Node,?MODULE,stop_tracer,[1]),
+    stop_node(Node),
+    ok = io:format("~p~n",[Result]),
+    [{Label,{'receive',_,Self,Receiver,'receive'}, _}] = Result,
+    ok.
+
 call(doc) -> 
     "Tests special forms {is_seq_trace} and {get_seq_token} "
 	"in trace match specs.";
diff --git a/lib/kernel/test/zlib_SUITE.erl b/lib/kernel/test/zlib_SUITE.erl
index 131a0685cd..f203ef878f 100644
--- a/lib/kernel/test/zlib_SUITE.erl
+++ b/lib/kernel/test/zlib_SUITE.erl
@@ -166,7 +166,7 @@ api_deflateInit(Config) when is_list(Config) ->
 			  ?m(ok, zlib:deflateInit(Z12,default,deflated,-Wbits,8,default)),
 			  ?m(ok,zlib:close(Z11)),
 			  ?m(ok,zlib:close(Z12))
-		  end, lists:seq(8, 15)),
+		  end, lists:seq(9, 15)),
 
     lists:foreach(fun(MemLevel) ->
 			  Z = zlib:open(),
@@ -213,12 +213,46 @@ api_deflateReset(Config) when is_list(Config) ->
 
 %% Test deflateParams.
 api_deflateParams(Config) when is_list(Config) ->
+    Levels = [none, default, best_speed, best_compression] ++ lists:seq(0, 9),
+    Strategies = [filtered, huffman_only, rle, default],
+
     Z1 = zlib:open(),
     ?m(ok, zlib:deflateInit(Z1, default)),
-    ?m(L when is_list(L), zlib:deflate(Z1, <<1,1,1,1,1,1,1,1,1>>, none)),
-    ?m(ok, zlib:deflateParams(Z1, best_compression, huffman_only)),
-    ?m(L when is_list(L), zlib:deflate(Z1, <<1,1,1,1,1,1,1,1,1>>, sync)),
-    ?m(ok, zlib:close(Z1)).
+
+    ApiTest =
+        fun(Level, Strategy) ->
+            ?m(ok, zlib:deflateParams(Z1, Level, Strategy)),
+            ?m(ok, zlib:deflateReset(Z1))
+        end,
+
+    [ ApiTest(Level, Strategy) || Level <- Levels, Strategy <- Strategies ],
+
+    ?m(ok, zlib:close(Z1)),
+
+    FlushTest =
+        fun FlushTest(Size, Level, Strategy) ->
+            Z = zlib:open(),
+            ok = zlib:deflateInit(Z, default),
+            Data = gen_determ_rand_bytes(Size),
+            case zlib:deflate(Z, Data, none) of
+                [<<120, 156>>] ->
+                    %% All data is present in the internal zlib state, and will
+                    %% be flushed on deflateParams.
+
+                    ok = zlib:deflateParams(Z, Level, Strategy),
+                    Compressed = [<<120, 156>>, zlib:deflate(Z, <<>>, finish)],
+                    Data = zlib:uncompress(Compressed),
+                    zlib:close(Z),
+
+                    FlushTest(Size + (1 bsl 10), Level, Strategy);
+                _Other ->
+                    ok
+            end
+        end,
+
+    [ FlushTest(1, Level, Strategy) || Level <- Levels, Strategy <- Strategies ],
+
+    ok.
 
 %% Test deflate.
 api_deflate(Config) when is_list(Config) ->
@@ -652,6 +686,11 @@ api_g_un_zip(Config) when is_list(Config) ->
     Concatenated = <<Bin/binary, Bin/binary>>,
     ?m(Concatenated, zlib:gunzip([Comp, Comp])),
 
+    %% Don't explode if the uncompressed size is a perfect multiple of the
+    %% internal inflate chunk size.
+    ChunkSizedData = <<0:16384/unit:8>>,
+    ?m(ChunkSizedData, zlib:gunzip(zlib:gzip(ChunkSizedData))),
+
     %% Bad CRC; bad length.
     BadCrc = bad_crc_data(),
     ?m(?EXIT(data_error),(catch zlib:gunzip(BadCrc))),
@@ -762,13 +801,13 @@ zip_usage({run,ZIP,ORIG}) ->
 
     ?m(ok, zlib:deflateInit(Z, default, deflated, -15, 8, default)),
     C2 = zlib:deflate(Z, ORIG, finish),
-    ?m(true, C1 == list_to_binary(C2)),
+    ?m(ORIG, zlib:unzip(C2)),
     ?m(ok, zlib:deflateEnd(Z)),
 
     ?m(ok, zlib:deflateInit(Z, none, deflated, -15, 8, filtered)),
     ?m(ok, zlib:deflateParams(Z, default, default)),
     C3 = zlib:deflate(Z, ORIG, finish),
-    ?m(true, C1 == list_to_binary(C3)),
+    ?m(ORIG, zlib:unzip(C3)),
     ?m(ok, zlib:deflateEnd(Z)),
 
     ok = zlib:close(Z),
@@ -978,23 +1017,37 @@ split_bin(Last,Acc) ->
 
 only_allow_owner(Config) when is_list(Config) ->
     Z = zlib:open(),
+    Owner = self(),
 
     ?m(ok, zlib:inflateInit(Z)),
     ?m(ok, zlib:inflateReset(Z)),
 
     {Pid, Ref} = spawn_monitor(
         fun() ->
-            ?m(?EXIT(not_on_controlling_process), zlib:inflateReset(Z))
+            ?m(?EXIT(not_on_controlling_process), zlib:inflateReset(Z)),
+            Owner ! '$transfer_ownership',
+            receive
+                '$ownership_transferred' ->
+                    ?m(ok, zlib:inflateReset(Z))
+            after 200 ->
+                ct:fail("Never received transfer signal.")
+            end
         end),
+    ownership_transfer_check(Z, Pid, Ref).
 
+ownership_transfer_check(Z, WorkerPid, Ref) ->
     receive
-        {'DOWN', Ref, process, Pid, _Reason} ->
-            ok
+        '$transfer_ownership' ->
+            zlib:set_controlling_process(Z, WorkerPid),
+            WorkerPid ! '$ownership_transferred',
+            ownership_transfer_check(Z, WorkerPid, Ref);
+        {'DOWN', Ref, process, WorkerPid, normal} ->
+            ok;
+        {'DOWN', Ref, process, WorkerPid, Reason} ->
+            ct:fail("Spawned worker crashed with reason ~p.", [Reason])
     after 200 ->
         ct:fail("Spawned worker timed out.")
-    end,
-
-    ?m(ok, zlib:inflateReset(Z)).
+    end.
 
 sub_heap_binaries(Config) when is_list(Config) ->
     Compressed = zlib:compress(<<"gurka">>),
diff --git a/lib/kernel/vsn.mk b/lib/kernel/vsn.mk
index cef54dd41a..60a1b0bff8 100644
--- a/lib/kernel/vsn.mk
+++ b/lib/kernel/vsn.mk
@@ -1 +1 @@
-KERNEL_VSN = 5.4
+KERNEL_VSN = 5.4.3
diff --git a/lib/megaco/doc/src/notes.xml b/lib/megaco/doc/src/notes.xml
index deb2bfcff3..54e048a172 100644
--- a/lib/megaco/doc/src/notes.xml
+++ b/lib/megaco/doc/src/notes.xml
@@ -37,7 +37,22 @@
   section is the version number of Megaco.</p>
 
 
-  <section><title>Megaco 3.18.2</title>
+  <section><title>Megaco 3.18.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Megaco 3.18.2</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/megaco/vsn.mk b/lib/megaco/vsn.mk
index 9c6ba5bba0..a4f7de7f07 100644
--- a/lib/megaco/vsn.mk
+++ b/lib/megaco/vsn.mk
@@ -19,6 +19,6 @@
 # %CopyrightEnd%
 
 APPLICATION = megaco
-MEGACO_VSN  = 3.18.2
+MEGACO_VSN  = 3.18.3
 PRE_VSN     =
 APP_VSN     = "$(APPLICATION)-$(MEGACO_VSN)$(PRE_VSN)"
diff --git a/lib/mnesia/doc/src/Makefile b/lib/mnesia/doc/src/Makefile
index da7a9e9516..82fcf66256 100644
--- a/lib/mnesia/doc/src/Makefile
+++ b/lib/mnesia/doc/src/Makefile
@@ -48,6 +48,7 @@ XML_PART_FILES = \
 
 XML_CHAPTER_FILES = \
 	Mnesia_chap1.xml \
+	Mnesia_overview.xml \
 	Mnesia_chap2.xml \
 	Mnesia_chap3.xml \
 	Mnesia_chap4.xml \
diff --git a/lib/mnesia/doc/src/notes.xml b/lib/mnesia/doc/src/notes.xml
index 026c6a89d7..ba94e913f5 100644
--- a/lib/mnesia/doc/src/notes.xml
+++ b/lib/mnesia/doc/src/notes.xml
@@ -39,7 +39,49 @@
     thus constitutes one section in this document. The title of each
     section is the version number of Mnesia.</p>
 
-  <section><title>Mnesia 4.15.1</title>
+  <section><title>Mnesia 4.15.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Removed a quadratic behavior in startup. This change
+	    implies that backend plugins (if used) must be set when
+	    the schema is created or via configuration parameters
+	    before mnesia is started.</p>
+          <p>
+	    Own Id: OTP-14829 Aux Id: ERIERL-84 </p>
+        </item>
+        <item>
+          <p>
+	    Bad timing could crash mnesia after a checkpoint was
+	    deactivated and reactivated with the same checkpoint name
+	    on different tables.</p>
+          <p>
+	    Own Id: OTP-14841 Aux Id: ERIERL-113 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Mnesia 4.15.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix backup error handling, the real failure reason was
+	    not returned.</p>
+          <p>
+	    Own Id: OTP-14776 Aux Id: ERIERL-103 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Mnesia 4.15.1</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/mnesia/src/mnesia.erl b/lib/mnesia/src/mnesia.erl
index b68b2de028..6d87544bd2 100644
--- a/lib/mnesia/src/mnesia.erl
+++ b/lib/mnesia/src/mnesia.erl
@@ -151,7 +151,8 @@
         {'snmp', SnmpStruct::term()} |
         {'storage_properties', [{Backend::module(), [BackendProp::_]}]} |
         {'type', 'set' | 'ordered_set' | 'bag'} |
-        {'local_content', boolean()}.
+        {'local_content', boolean()} |
+        {'user_properties', proplists:proplist()}.
 
 -type t_result(Res) :: {'atomic', Res} | {'aborted', Reason::term()}.
 -type activity() :: 'ets' | 'async_dirty' | 'sync_dirty' | 'transaction' | 'sync_transaction' |
@@ -176,8 +177,8 @@
 
 %% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
 	Value -> Value
     end.
 
@@ -2681,7 +2682,7 @@ del_table_index(Tab, Ix) ->
 
 -spec transform_table(Tab::table(), Fun, [Attr]) -> t_result(ok) when
       Attr :: atom(),
-      Fun:: fun((Record::tuple()) -> Transformed::tuple()).
+      Fun:: fun((Record::tuple()) -> Transformed::tuple()) | ignore.
 transform_table(Tab, Fun, NewA) ->
     try val({Tab, record_name}) of
 	OldRN -> mnesia_schema:transform_table(Tab, Fun, NewA, OldRN)
@@ -2692,7 +2693,7 @@ transform_table(Tab, Fun, NewA) ->
 -spec transform_table(Tab::table(), Fun, [Attr], RecName) -> t_result(ok) when
       RecName :: atom(),
       Attr :: atom(),
-      Fun:: fun((Record::tuple()) -> Transformed::tuple()).
+      Fun:: fun((Record::tuple()) -> Transformed::tuple()) | ignore.
 transform_table(Tab, Fun, NewA, NewRN) ->
     mnesia_schema:transform_table(Tab, Fun, NewA, NewRN).
 
diff --git a/lib/mnesia/src/mnesia.hrl b/lib/mnesia/src/mnesia.hrl
index da7e662288..e36222d098 100644
--- a/lib/mnesia/src/mnesia.hrl
+++ b/lib/mnesia/src/mnesia.hrl
@@ -47,6 +47,10 @@
 -define(catch_val(Var), (try ?ets_lookup_element(mnesia_gvar, Var, 2)
 			 catch error:_ -> {'EXIT', {badarg, []}} end)).
 
+-define(catch_val_and_stack(Var),
+        (try ?ets_lookup_element(mnesia_gvar, Var, 2)
+         catch error:_:_Stacktrace -> {'EXIT', _Stacktrace} end)).
+
 %% It's important that counter is first, since we compare tid's
 
 -record(tid,
diff --git a/lib/mnesia/src/mnesia_bup.erl b/lib/mnesia/src/mnesia_bup.erl
index 34f16f178b..9dda340333 100644
--- a/lib/mnesia/src/mnesia_bup.erl
+++ b/lib/mnesia/src/mnesia_bup.erl
@@ -90,9 +90,9 @@ iterate(Mod, Fun, Opaque, Acc) ->
 	    catch throw:Err ->
 		    close_read(R2),
 		    Err;
-		  _:Reason ->
+		  _:Reason:Stacktrace ->
 		    close_read(R2),
-		    {error, {Reason, erlang:get_stacktrace()}}
+		    {error, {Reason, Stacktrace}}
 	    end
     catch throw:{error,_} = Err ->
 	    Err
@@ -198,9 +198,9 @@ do_read_schema_section(R) ->
     try
 	{R3, RawSchema} = safe_apply(R2, read, [R2#restore.bup_data]),
 	do_read_schema_section(R3, verify_header(RawSchema), [])
-    catch T:E ->
+    catch T:E:S ->
 	    close_read(R2),
-	    erlang:raise(T,E,erlang:get_stacktrace())
+	    erlang:raise(T,E,S)
     end.
 
 do_read_schema_section(R, {ok, B, C, []}, Acc) ->
diff --git a/lib/mnesia/src/mnesia_checkpoint.erl b/lib/mnesia/src/mnesia_checkpoint.erl
index 2ff77326a9..8290237908 100644
--- a/lib/mnesia/src/mnesia_checkpoint.erl
+++ b/lib/mnesia/src/mnesia_checkpoint.erl
@@ -857,9 +857,9 @@ retainer_loop(Cp = #checkpoint_args{is_activated=false, name=Name}) ->
 retainer_loop(Cp = #checkpoint_args{name=Name}) ->
     receive
 	{_From, {retain, Tid, Tab, Key, OldRecs}} ->
-	    R = val({Tab, {retainer, Name}}),
+	    R = ?catch_val({Tab, {retainer, Name}}),
 	    PendingTab = Cp#checkpoint_args.pending_tab,
-	    case R#retainer.really_retain of
+            case is_record(R, retainer) andalso R#retainer.really_retain of
 		true ->
 		    Store = R#retainer.store,
 		    try true = ets:member(PendingTab, Tid),
@@ -1269,9 +1269,9 @@ system_code_change(Cp, _Module, _OldVsn, _Extra) ->
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
-	_VaLuE_ -> _VaLuE_
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
+	Value -> Value
     end.
-
diff --git a/lib/mnesia/src/mnesia_controller.erl b/lib/mnesia/src/mnesia_controller.erl
index 77013489b3..77e67a59db 100644
--- a/lib/mnesia/src/mnesia_controller.erl
+++ b/lib/mnesia/src/mnesia_controller.erl
@@ -185,9 +185,10 @@ max_loaders() ->
 		      worker_res
 		     }).
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
 	Value -> Value
     end.
 
diff --git a/lib/mnesia/src/mnesia_dumper.erl b/lib/mnesia/src/mnesia_dumper.erl
index f0ed7aef4a..31bcc1451f 100644
--- a/lib/mnesia/src/mnesia_dumper.erl
+++ b/lib/mnesia/src/mnesia_dumper.erl
@@ -191,8 +191,7 @@ do_perform_dump(Cont, InPlace, InitBy, Regulator, OldVersion) ->
 	    try insert_recs(Recs, InPlace, InitBy, Regulator, OldVersion) of
 		Version ->
 		    do_perform_dump(C2, InPlace, InitBy, Regulator, Version)
-	    catch _:R when R =/= fatal ->
-		    ST = erlang:get_stacktrace(),
+	    catch _:R:ST when R =/= fatal ->
 		    Reason = {"Transaction log dump error: ~tp~n", [{R, ST}]},
 		    close_files(InPlace, {error, Reason}, InitBy),
 		    exit(Reason)
@@ -325,8 +324,7 @@ perform_update(Tid, SchemaOps, _DumperMode, _UseDir) ->
 	 ?eval_debug_fun({?MODULE, post_dump}, [InitBy]),
 	 close_files(InPlace, ok, InitBy),
 	 ok
-    catch _:Reason when Reason =/= fatal ->
-	    ST = erlang:get_stacktrace(),
+    catch _:Reason:ST when Reason =/= fatal ->
 	    Error = {error, {"Schema update error", {Reason, ST}}},
 	    close_files(InPlace, Error, InitBy),
             fatal("Schema update error ~tp ~tp", [{Reason,ST}, SchemaOps])
@@ -1471,8 +1469,9 @@ regulate(RegulatorPid) ->
 	{regulated, RegulatorPid} -> ok
     end.
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
 	Value -> Value
     end.
diff --git a/lib/mnesia/src/mnesia_frag.erl b/lib/mnesia/src/mnesia_frag.erl
index c39f30e140..63fb4981fe 100644
--- a/lib/mnesia/src/mnesia_frag.erl
+++ b/lib/mnesia/src/mnesia_frag.erl
@@ -1157,9 +1157,10 @@ remove_node(Node, Cs) ->
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% Helpers
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
 	Value -> Value
     end.
 
diff --git a/lib/mnesia/src/mnesia_lib.erl b/lib/mnesia/src/mnesia_lib.erl
index 53fdd76de8..56f6926df0 100644
--- a/lib/mnesia/src/mnesia_lib.erl
+++ b/lib/mnesia/src/mnesia_lib.erl
@@ -116,7 +116,7 @@
 	 lock_table/1,
 	 mkcore/1,
 	 not_active_here/1,
-         other_val/1,
+         other_val/2,
          overload_read/0,
          overload_read/1,
          overload_set/2,
@@ -435,8 +435,8 @@ validate_record(Tab, Obj) ->
 %%
 
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> other_val(Var, Stacktrace);
 	_VaLuE_ -> _VaLuE_
     end.
 
@@ -446,9 +446,9 @@ set(Var, Val) ->
 unset(Var) ->
     ?ets_delete(mnesia_gvar, Var).
 
-other_val(Var) ->
+other_val(Var, Stacktrace) ->
     case other_val_1(Var) of
-        error -> pr_other(Var);
+        error -> pr_other(Var, Stacktrace);
         Val -> Val
     end.
 
@@ -460,8 +460,8 @@ other_val_1(Var) ->
 	_ -> error
     end.
 
--spec pr_other(_) -> no_return().
-pr_other(Var) ->
+-spec pr_other(_, _) -> no_return().
+pr_other(Var, Stacktrace) ->
     Why =
 	case is_running() of
 	    no -> {node_not_running, node()};
@@ -469,7 +469,7 @@ pr_other(Var) ->
 	end,
     verbose("~p (~tp) val(mnesia_gvar, ~tw) -> ~p ~tp ~n",
 	    [self(), process_info(self(), registered_name),
-	     Var, Why, erlang:get_stacktrace()]),
+	     Var, Why, Stacktrace]),
     mnesia:abort(Why).
 
 %% Some functions for list valued variables
diff --git a/lib/mnesia/src/mnesia_loader.erl b/lib/mnesia/src/mnesia_loader.erl
index 4c6336cb73..bbceb9ba66 100644
--- a/lib/mnesia/src/mnesia_loader.erl
+++ b/lib/mnesia/src/mnesia_loader.erl
@@ -34,9 +34,10 @@
 
 -include("mnesia.hrl").
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
 	Value -> Value
     end.
 
@@ -535,7 +536,7 @@ init_table(Tab, _, Fun, _DetsInfo,_) ->
     try
 	true = ets:init_table(Tab, Fun),
 	ok
-    catch _:Else -> {Else, erlang:get_stacktrace()}
+    catch _:Else:Stacktrace -> {Else, Stacktrace}
     end.
 
 
@@ -777,9 +778,9 @@ do_send_table(Pid, Tab, Storage, RemoteS) ->
         throw:receiver_died ->
             cleanup_tab_copier(Pid, Storage, Tab),
             ok;
-        error:Reason -> %% Prepare failed
+        error:Reason:Stacktrace -> %% Prepare failed
             cleanup_tab_copier(Pid, Storage, Tab),
-            {error, {tab_copier, Tab, {Reason, erlang:get_stacktrace()}}}
+            {error, {tab_copier, Tab, {Reason, Stacktrace}}}
     after
         unlink(whereis(mnesia_tm))
     end.
diff --git a/lib/mnesia/src/mnesia_locker.erl b/lib/mnesia/src/mnesia_locker.erl
index 073b48abc0..710bf38cb5 100644
--- a/lib/mnesia/src/mnesia_locker.erl
+++ b/lib/mnesia/src/mnesia_locker.erl
@@ -97,10 +97,11 @@ init(Parent) ->
     end,
     loop(#state{supervisor = Parent}).
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
-	_VaLuE_ -> _VaLuE_
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
+	Value -> Value
     end.
 
 reply(From, R) ->
diff --git a/lib/mnesia/src/mnesia_log.erl b/lib/mnesia/src/mnesia_log.erl
index 55b1d6e419..a2de23a2a3 100644
--- a/lib/mnesia/src/mnesia_log.erl
+++ b/lib/mnesia/src/mnesia_log.erl
@@ -752,8 +752,8 @@ abort_write(B, What, Args, Reason) ->
     Opaque = B#backup_args.opaque,
     dbg_out("Failed to perform backup. M=~p:F=~tp:A=~tp -> ~tp~n",
 	    [Mod, What, Args, Reason]),
-    try apply(Mod, abort_write, [Opaque]) of
-	{ok, _Res} -> throw({error, Reason})
+    try {ok, _Res} = apply(Mod, abort_write, [Opaque]) of
+        _ -> throw({error, Reason})
     catch _:Other ->
 	    error("Failed to abort backup. ~p:~tp~tp -> ~tp~n",
 		  [Mod, abort_write, [Opaque], Other]),
diff --git a/lib/mnesia/src/mnesia_recover.erl b/lib/mnesia/src/mnesia_recover.erl
index d792070332..475bf3c327 100644
--- a/lib/mnesia/src/mnesia_recover.erl
+++ b/lib/mnesia/src/mnesia_recover.erl
@@ -177,10 +177,10 @@ disconnect(Node) ->
 log_decision(D) ->
     cast({log_decision, D}).
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _Reason} ->
-	    mnesia_lib:other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
 	Value -> Value
     end.
 
diff --git a/lib/mnesia/src/mnesia_schema.erl b/lib/mnesia/src/mnesia_schema.erl
index 83cc19c678..de6c3fb4ee 100644
--- a/lib/mnesia/src/mnesia_schema.erl
+++ b/lib/mnesia/src/mnesia_schema.erl
@@ -181,9 +181,10 @@ exit_on_error({error, Reason}) ->
 exit_on_error(GoodRes) ->
     GoodRes.
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
 	Value -> Value
     end.
 
@@ -952,19 +953,9 @@ get_index_plugins() ->
     get_schema_user_property(mnesia_index_plugins).
 
 get_schema_user_property(Key) ->
-    Tab = schema,
-    %% Must work reliably both within transactions and outside of transactions
-    Res = case get(mnesia_activity_state) of
-	      undefined ->
-		  dirty_read_table_property(Tab, Key);
-	      _ ->
-		  do_read_table_property(Tab, Key)
-	  end,
-    case Res of
-	undefined ->
-	    [];
-	{_, Types} ->
-	    Types
+    case dirty_read_table_property(schema, Key) of
+	undefined ->  [];
+	{_, Types} -> Types
     end.
 
 get_ext_types_disc() ->
@@ -2705,10 +2696,10 @@ prepare_op(_Tid, {op, transform, Fun, TabDef}, _WaitFor) ->
                 Objs ->
 		    mnesia_lib:db_fixtable(Storage, Tab, false),
                     {true, Objs, mandatory}
-	    catch _:Reason ->
+	    catch _:Reason:Stacktrace ->
 		    mnesia_lib:db_fixtable(Storage, Tab, false),
 		    mnesia_lib:important("Transform function failed: '~tp' in '~tp'",
-					 [Reason, erlang:get_stacktrace()]),
+					 [Reason, Stacktrace]),
                     exit({"Bad transform function", Tab, Fun, node(), Reason})
             end
     end;
diff --git a/lib/mnesia/src/mnesia_tm.erl b/lib/mnesia/src/mnesia_tm.erl
index ebf580d09e..3f6f6c98d8 100644
--- a/lib/mnesia/src/mnesia_tm.erl
+++ b/lib/mnesia/src/mnesia_tm.erl
@@ -121,10 +121,11 @@ init(Parent) ->
     proc_lib:init_ack(Parent, {ok, self()}),
     doit_loop(#state{supervisor = Parent}).
 
+%% Local function in order to avoid external function call
 val(Var) ->
-    case ?catch_val(Var) of
-	{'EXIT', _} -> mnesia_lib:other_val(Var);
-	_VaLuE_ -> _VaLuE_
+    case ?catch_val_and_stack(Var) of
+	{'EXIT', Stacktrace} -> mnesia_lib:other_val(Var, Stacktrace);
+	Value -> Value
     end.
 
 reply({From,Ref}, R) ->
@@ -597,9 +598,9 @@ recover_coordinator(Tid, Etabs) ->
 		false ->  %% When killed before store havn't been copied to
 		    ok    %% to the new nested trans store.
 	    end
-    catch _:Reason ->
+    catch _:Reason:Stacktrace ->
 	    dbg_out("Recovery of coordinator ~p failed: ~tp~n",
-		    [Tid, {Reason, erlang:get_stacktrace()}]),
+		    [Tid, {Reason, Stacktrace}]),
 	    Protocol = asym_trans,
 	    tell_outcome(Tid, Protocol, node(), CheckNodes, TellNodes)
     end,
@@ -825,8 +826,7 @@ execute_transaction(Fun, Args, Factor, Retries, Type) ->
     catch throw:Value ->  %% User called throw
 	    Reason = {aborted, {throw, Value}},
 	    return_abort(Fun, Args, Reason);
-	  error:Reason ->
-	    ST = erlang:get_stacktrace(),
+	  error:Reason:ST ->
 	    check_exit(Fun, Args, Factor, Retries, {Reason,ST}, Type);
 	  _:Reason ->
 	    check_exit(Fun, Args, Factor, Retries, Reason, Type)
@@ -1796,14 +1796,13 @@ do_update(Tid, Storage, [Op | Ops], OldRes) ->
     try do_update_op(Tid, Storage, Op) of
 	ok ->     do_update(Tid, Storage, Ops, OldRes);
 	NewRes -> do_update(Tid, Storage, Ops, NewRes)
-    catch _:Reason ->
+    catch _:Reason:ST ->
 	    %% This may only happen when we recently have
 	    %% deleted our local replica, changed storage_type
 	    %% or transformed table
 	    %% BUGBUG: Updates may be lost if storage_type is changed.
 	    %%         Determine actual storage type and try again.
 	    %% BUGBUG: Updates may be lost if table is transformed.
-	    ST = erlang:get_stacktrace(),
 	    verbose("do_update in ~w failed: ~tp -> {'EXIT', ~tp}~n",
 		    [Tid, Op, {Reason, ST}]),
 	    do_update(Tid, Storage, Ops, OldRes)
@@ -1914,11 +1913,10 @@ commit_clear([H|R], Tid, Storage, Tab, K, Obj)
 do_snmp(_, []) ->   ok;
 do_snmp(Tid, [Head|Tail]) ->
     try mnesia_snmp_hook:update(Head)
-    catch _:Reason ->
+    catch _:Reason:ST ->
 	    %% This should only happen when we recently have
 	    %% deleted our local replica or recently deattached
 	    %% the snmp table
-	    ST = erlang:get_stacktrace(),
 	    verbose("do_snmp in ~w failed: ~tp -> {'EXIT', ~tp}~n",
 		    [Tid, Head, {Reason, ST}])
     end,
@@ -2212,7 +2210,7 @@ display_pid_info(Pid) ->
 			   Other
 		   end,
 	    Reds  = fetch(reductions, Info),
-	    LM = length(fetch(messages, Info)),
+	    LM = fetch(message_queue_len, Info),
 	    pformat(io_lib:format("~p", [Pid]),
 		    io_lib:format("~tp", [Call]),
 		    io_lib:format("~tp", [Curr]), Reds, LM)
diff --git a/lib/mnesia/test/mnesia_test_lib.erl b/lib/mnesia/test/mnesia_test_lib.erl
index 78dbe7ffde..db0e7beac6 100644
--- a/lib/mnesia/test/mnesia_test_lib.erl
+++ b/lib/mnesia/test/mnesia_test_lib.erl
@@ -470,9 +470,9 @@ get_suite(Mod, {group, Suite}) ->
 	{_, _, TCList} = lists:keyfind(Suite, 1, Groups),
 	TCList
     catch
-	_:Reason ->
+	_:Reason:Stacktrace ->
 	    io:format("Not implemented ~p ~p (~p ~p)~n",
-		      [Mod,Suite,Reason, erlang:get_stacktrace()]),
+		      [Mod,Suite,Reason,Stacktrace]),
 	    'NYI'
     end;
 get_suite(Mod, all) ->
diff --git a/lib/mnesia/test/mnesia_test_lib.hrl b/lib/mnesia/test/mnesia_test_lib.hrl
index ba7eb10ea2..90a3c686b0 100644
--- a/lib/mnesia/test/mnesia_test_lib.hrl
+++ b/lib/mnesia/test/mnesia_test_lib.hrl
@@ -55,25 +55,25 @@
 			?error("Not Matching Actual result was:~n ~p~n",[_AR_0]),
 			{fail,_AR_0}
 		catch
-		    exit:{aborted, _ER_1} when
+		    exit:{aborted, _ER_1}:Stacktrace when
 			  element(1, _ER_1) =:= node_not_running;
 			  element(1, _ER_1) =:= bad_commit;
 			  element(1, _ER_1) =:= cyclic ->
 			%% Need to re-raise these to restart transaction
-			erlang:raise(exit, {aborted, _ER_1}, erlang:get_stacktrace());
-		    exit:_AR_1 ->
+			erlang:raise(exit, {aborted, _ER_1}, Stacktrace);
+		    exit:_AR_1:Stacktrace ->
 			case fun(_AR_EXIT_) -> {'EXIT', _AR_EXIT_} end(_AR_1) of
 			    _AR_2 = ExpectedRes ->
 				?verbose("ok, ~n Result as expected:~p~n",[_AR_2]),
 				{success,_AR_2};
 			    _AR_2 ->
 				?error("Not Matching Actual result was:~n ~p~n ~p~n",
-				       [_AR_2, erlang:get_stacktrace()]),
+				       [_AR_2, Stacktrace]),
 				{fail,_AR_2}
 			end;
-		    _T1_:_AR_1 ->
+		    _T1_:_AR_1:Stacktrace ->
 			?error("Not Matching Actual result was:~n ~p~n  ~p~n",
-			       [{_T1_,_AR_1}, erlang:get_stacktrace()]),
+			       [{_T1_,_AR_1}, Stacktrace]),
 			{fail,{_T1_,_AR_1}}
 		end
 	end()).
diff --git a/lib/mnesia/vsn.mk b/lib/mnesia/vsn.mk
index a95f468ba2..45f811846d 100644
--- a/lib/mnesia/vsn.mk
+++ b/lib/mnesia/vsn.mk
@@ -1 +1 @@
-MNESIA_VSN = 4.15.1
+MNESIA_VSN = 4.15.3
diff --git a/lib/observer/doc/src/Makefile b/lib/observer/doc/src/Makefile
index a3b0663041..11bfee1bdb 100644
--- a/lib/observer/doc/src/Makefile
+++ b/lib/observer/doc/src/Makefile
@@ -48,12 +48,12 @@ XML_PART_FILES = \
 	part.xml
 
 XML_CHAPTER_FILES = \
+	introduction_ug.xml \
 	crashdump_ug.xml \
 	etop_ug.xml \
 	observer_ug.xml \
 	ttb_ug.xml \
-	notes.xml \
-	notes_history.xml
+	notes.xml
 
 BOOK_FILES = book.xml
 
diff --git a/lib/observer/doc/src/notes.xml b/lib/observer/doc/src/notes.xml
index 05ea550964..c0b8309af6 100644
--- a/lib/observer/doc/src/notes.xml
+++ b/lib/observer/doc/src/notes.xml
@@ -32,6 +32,131 @@
   <p>This document describes the changes made to the Observer
     application.</p>
 
+<section><title>Observer 2.7</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    etop.hrl used a relative path to include
+	    observer_backend.hrl, this is now changed to use
+	    include_lib instead. runtime_tools/include is added to
+	    the tertiary bootstrap.</p>
+          <p>
+	    Own Id: OTP-14842 Aux Id: ERL-534 </p>
+        </item>
+        <item>
+          <p>
+	    If a crashdump was truncated in the attributes section
+	    for a module, crashdump_viewer would crash when a module
+	    view was opened from the GUI. This bug was introduced in
+	    OTP-20.2 and is now corrected.</p>
+          <p>
+	    Own Id: OTP-14846 Aux Id: ERL-537 </p>
+        </item>
+        <item>
+          <p>
+	    Optimized ets and mnesia table view tab in observer gui,
+	    listing 10000 tables was previously very slow.</p>
+          <p>
+	    Own Id: OTP-14856 Aux Id: ERIERL-117 </p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    When a process has many links and/or monitors, it could
+	    earlier take very long time to display the process
+	    information window. This is now improved by only showing
+	    a few links and monitors, and then an link named
+	    "more..." to expand the rest.</p>
+          <p>
+	    Own Id: OTP-14725</p>
+        </item>
+        <item>
+          <p>
+	    More crash dump info such as: process binary virtual heap
+	    stats, full info for process causing out-of-mem during
+	    GC, more port related info, and dirty scheduler info.</p>
+          <p>
+	    Own Id: OTP-14820</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Observer 2.6</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    A bug introduced in OTP-20 would make Crashdump Viewer
+	    crash when trying to expand an empty binary. This is now
+	    corrected.</p>
+          <p>
+	    Own Id: OTP-14642</p>
+        </item>
+        <item>
+          <p>
+	    If a match spec in the config file contained more than
+	    one clause, observer would earlier crash when trying to
+	    display it in the GUI. This is now corrected.</p>
+          <p>
+	    Own Id: OTP-14643 Aux Id: ERL-489 </p>
+        </item>
+        <item>
+	    <p>Writing of crash dumps is significantly faster.</p>
+	    <p>Maps are now included in crash dumps.</p>
+	    <p>Constants terms would only be shown in one process,
+	    while other processes referencing the same constant term
+	    would show a marker for incomplete heap. </p>
+          <p>
+	    Own Id: OTP-14685 Aux Id: OTP-14611, OTP-14603, OTP-14595 </p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+	    <p>Binaries and some other data in crash dumps are now
+	    encoded in base64 (instead of in hex), which will reduce
+	    the size of crash dumps.</p>
+	    <p>A few bugs in the handling of sub binaries in
+	    <c>crashdump_viewer</c> have been fixed.</p>
+          <p>
+	    Own Id: OTP-14686</p>
+        </item>
+        <item>
+          <p>
+	    In order to allow future improvements, Crashdump Viewer
+	    now checks the version tag of the crashdump to see that
+	    it is a known format. If the crashdump version is newer
+	    than Crashdump Viewer is prepared to read, then an
+	    information dialog is displayed before Crashdump Viewer
+	    terminates.</p>
+          <p>
+	    If an incomplete process heap is discovered in a
+	    crashdump, Crashdump Viewer will now display a warning
+	    for this, similar to the warning displayed when a
+	    crashdump is truncated. Incomplete heaps can occur if for
+	    instance the literals are not included, which is the case
+	    for all dumps prior to OTP-20.2.</p>
+          <p>
+	    Own Id: OTP-14755</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Observer 2.5</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/observer/include/etop.hrl b/lib/observer/include/etop.hrl
index 002937e522..f8d370450b 100644
--- a/lib/observer/include/etop.hrl
+++ b/lib/observer/include/etop.hrl
@@ -18,4 +18,4 @@
 %% %CopyrightEnd%
 %%
 
--include("../../runtime_tools/include/observer_backend.hrl").
+-include_lib("runtime_tools/include/observer_backend.hrl").
diff --git a/lib/observer/src/cdv_bin_cb.erl b/lib/observer/src/cdv_bin_cb.erl
index 5502869973..a4a542297c 100644
--- a/lib/observer/src/cdv_bin_cb.erl
+++ b/lib/observer/src/cdv_bin_cb.erl
@@ -71,6 +71,8 @@ hex_binary_fun(Bin) ->
 	    plain_html(io_lib:format("~s",[S]))
     end.
 
+format_hex(<<>>,_) ->
+    [];
 format_hex(<<B1:4,B2:4>>,_) ->
     [integer_to_list(B1,16),integer_to_list(B2,16)];
 format_hex(<<B1:4,B2:4,Bin/binary>>,0) ->
diff --git a/lib/observer/src/cdv_detail_wx.erl b/lib/observer/src/cdv_detail_wx.erl
index f6d282638a..6c4739042b 100644
--- a/lib/observer/src/cdv_detail_wx.erl
+++ b/lib/observer/src/cdv_detail_wx.erl
@@ -48,6 +48,7 @@ init([Id, Data, ParentFrame, Callback, App, Parent]) ->
     display_progress(ParentFrame,App),
     case Callback:get_details(Id, Data) of
 	{ok,Details} ->
+            display_progress_pulse(Callback,Id),
 	    init(Id,ParentFrame,Callback,App,Parent,Details);
 	{yes_no, Info, Fun} ->
             destroy_progress(App),
@@ -69,8 +70,16 @@ display_progress(ParentFrame,cdv) ->
                                          "Reading data");
 display_progress(_,_) ->
     ok.
+
+%% Display pulse while creating process detail page with much data
+display_progress_pulse(cdv_proc_cb,Pid) ->
+    observer_lib:report_progress({ok,"Displaying data for "++Pid}),
+    observer_lib:report_progress({ok,start_pulse});
+display_progress_pulse(_,_) ->
+    ok.
+
 destroy_progress(cdv) ->
-    observer_lib:destroy_progress_dialog();
+    observer_lib:sync_destroy_progress_dialog();
 destroy_progress(_) ->
     ok.
 
diff --git a/lib/observer/src/cdv_html_wx.erl b/lib/observer/src/cdv_html_wx.erl
index 4b43b6a840..77a9d3207b 100644
--- a/lib/observer/src/cdv_html_wx.erl
+++ b/lib/observer/src/cdv_html_wx.erl
@@ -94,21 +94,21 @@ handle_event(#wx{event=#wxHtmlLink{type=command_html_link_clicked,
 	case Target of
 	    "#Binary?" ++ BinSpec ->
 		[{"offset",Off},{"size",Size},{"pos",Pos}] =
-		    httpd:parse_query(BinSpec),
+		    uri_string:dissect_query(BinSpec),
 		Id = {cdv, {list_to_integer(Off),
 			    list_to_integer(Size),
 			    list_to_integer(Pos)}},
 		expand(Id,cdv_bin_cb,State);
 	    "#OBSBinary?" ++ BinSpec ->
 		[{"key1",Preview},{"key2",Size},{"key3",Hash}] =
-		    httpd:parse_query(BinSpec),
+		    uri_string:dissect_query(BinSpec),
 		Id = {obs, {Tab, {list_to_integer(Preview),
 				  list_to_integer(Size),
 				  list_to_integer(Hash)}}},
 		expand(Id,cdv_bin_cb,State);
 	    "#Term?" ++ TermKeys ->
 		[{"key1",Key1},{"key2",Key2},{"key3",Key3}] =
-		    httpd:parse_query(TermKeys),
+		    uri_string:dissect_query(TermKeys),
 		Id = {cdv, {Tab,{list_to_integer(Key1),
 				 list_to_integer(Key2),
 				 list_to_integer(Key3)}}},
diff --git a/lib/observer/src/cdv_info_wx.erl b/lib/observer/src/cdv_info_wx.erl
index 7e416dd11a..07c28610e2 100644
--- a/lib/observer/src/cdv_info_wx.erl
+++ b/lib/observer/src/cdv_info_wx.erl
@@ -95,6 +95,10 @@ handle_cast(Msg, State) ->
     io:format("~p~p: Unhandled cast ~tp~n",[?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
+handle_event(#wx{obj=MoreEntry,event=#wxMouse{type=left_down},userData={more,More}}, State) ->
+    observer_lib:add_scroll_entries(MoreEntry,More),
+    {noreply, State};
+
 handle_event(#wx{event=#wxMouse{type=left_down},userData=Target}, State) ->
     cdv_virtual_list_wx:start_detail_win(Target),
     {noreply, State};
diff --git a/lib/observer/src/cdv_port_cb.erl b/lib/observer/src/cdv_port_cb.erl
index b5cbe8132d..6bb8f07a74 100644
--- a/lib/observer/src/cdv_port_cb.erl
+++ b/lib/observer/src/cdv_port_cb.erl
@@ -34,7 +34,8 @@
 -define(COL_CONN, ?COL_ID+1).
 -define(COL_NAME, ?COL_CONN+1).
 -define(COL_CTRL, ?COL_NAME+1).
--define(COL_SLOT, ?COL_CTRL+1).
+-define(COL_QUEUE, ?COL_CTRL+1).
+-define(COL_SLOT, ?COL_QUEUE+1).
 
 
 
@@ -44,6 +45,7 @@ col_to_elem(?COL_ID)  -> #port.id;
 col_to_elem(?COL_CONN) -> #port.connected;
 col_to_elem(?COL_NAME)  -> #port.name;
 col_to_elem(?COL_CTRL) -> #port.controls;
+col_to_elem(?COL_QUEUE) -> #port.queue;
 col_to_elem(?COL_SLOT) -> #port.slot.
 
 col_spec() ->
@@ -51,6 +53,7 @@ col_spec() ->
      {"Connected", ?wxLIST_FORMAT_LEFT, 120},
      {"Name", ?wxLIST_FORMAT_LEFT, 150},
      {"Controls", ?wxLIST_FORMAT_LEFT, 200},
+     {"Queue", ?wxLIST_FORMAT_RIGHT, 100},
      {"Slot", ?wxLIST_FORMAT_RIGHT, 50}].
 
 get_info(_) ->
@@ -96,9 +99,17 @@ format(D) ->
 info_fields() ->
     [{"Overview",
       [{"Name",             name},
+       {"State",            state},
+       {"Task Flags",       task_flags},
        {"Connected",        {click,connected}},
        {"Slot",             slot},
-       {"Controls",         controls}]},
+       {"Controls",         controls},
+       {"Input bytes",      input},
+       {"Output bytes",     output},
+       {"Queue bytes",      queue},
+       {"Port data",        port_data}]},
     {scroll_boxes,
      [{"Links",1,{click,links}},
-       {"Monitors",1,{click,monitors}}]}].
+      {"Monitors",1,{click,monitors}},
+      {"Suspended",1,{click,suspended}}
+     ]}].
diff --git a/lib/observer/src/cdv_proc_cb.erl b/lib/observer/src/cdv_proc_cb.erl
index f10650bbb7..0ea23dd7cb 100644
--- a/lib/observer/src/cdv_proc_cb.erl
+++ b/lib/observer/src/cdv_proc_cb.erl
@@ -149,6 +149,10 @@ info_fields() ->
        {"Old Heap",         old_heap},
        {"Heap Unused",      heap_unused},
        {"Old Heap Unused",  old_heap_unused},
+       {"Binary vheap",     bin_vheap},
+       {"Old Binary vheap", old_bin_vheap},
+       {"Binary vheap unused",  bin_vheap_unused},
+       {"Old Binary vheap unused", old_bin_vheap_unused},
        {"Number of Heap Fragements", num_heap_frag},
        {"Heap Fragment Data",heap_frag_data},
        {"New Heap Start",   new_heap_start},
diff --git a/lib/observer/src/cdv_sched_cb.erl b/lib/observer/src/cdv_sched_cb.erl
index 192aaf31a7..d2696a276f 100644
--- a/lib/observer/src/cdv_sched_cb.erl
+++ b/lib/observer/src/cdv_sched_cb.erl
@@ -31,7 +31,8 @@
 
 %% Columns
 -define(COL_ID,  0).
--define(COL_PROC,  ?COL_ID+1).
+-define(COL_TYPE,  ?COL_ID+1).
+-define(COL_PROC,  ?COL_TYPE+1).
 -define(COL_PORT,  ?COL_PROC+1).
 -define(COL_RQL,   ?COL_PORT+1).
 -define(COL_PQL,   ?COL_RQL+1).
@@ -39,6 +40,7 @@
 %% Callbacks for cdv_virtual_list_wx
 col_to_elem(id) -> col_to_elem(?COL_ID);
 col_to_elem(?COL_ID)  -> #sched.name;
+col_to_elem(?COL_TYPE)  -> #sched.type;
 col_to_elem(?COL_PROC)  -> #sched.process;
 col_to_elem(?COL_PORT)  -> #sched.port;
 col_to_elem(?COL_RQL)   -> #sched.run_q;
@@ -46,6 +48,7 @@ col_to_elem(?COL_PQL)   -> #sched.port_q.
 
 col_spec() ->
     [{"Id",                ?wxLIST_FORMAT_RIGHT,   50},
+     {"Type",              ?wxLIST_FORMAT_CENTER, 100},
      {"Current Process",   ?wxLIST_FORMAT_CENTER, 130},
      {"Current Port",      ?wxLIST_FORMAT_CENTER, 130},
      {"Run Queue Length",  ?wxLIST_FORMAT_RIGHT,  180},
@@ -73,7 +76,8 @@ detail_pages() ->
     [{"Scheduler Information", fun init_gen_page/2}].
 
 init_gen_page(Parent, Info0) ->
-    Fields = info_fields(),
+    Type = proplists:get_value(type, Info0),
+    Fields = info_fields(Type),
     Details = proplists:get_value(details, Info0),
     Info = if is_map(Details) -> Info0 ++ maps:to_list(Details);
 	      true -> Info0
@@ -81,15 +85,16 @@ init_gen_page(Parent, Info0) ->
     cdv_info_wx:start_link(Parent,{Fields,Info,[]}).
 
 %%% Internal
-info_fields() ->
+info_fields(Type) ->
     [{"Scheduler Overview",
       [{"Id",             id},
+       {"Type",           type},
        {"Current Process",process},
        {"Current Port",   port},
        {"Sleep Info Flags", sleep_info},
        {"Sleep Aux Work",   sleep_aux}
       ]},
-     {"Run Queues",
+     {run_queues_header(Type),
       [{"Flags",                   runq_flags},
        {"Priority Max Length",     runq_max},
        {"Priority High Length",    runq_high},
@@ -116,3 +121,8 @@ info_fields() ->
        {"     ",           {currp_stack, 11}}
       ]}
     ].
+
+run_queues_header(normal) ->
+    "Run Queues";
+run_queues_header(DirtyX) ->
+    "Run Queues (common for all '" ++ atom_to_list(DirtyX) ++ "' schedulers)".
diff --git a/lib/observer/src/crashdump_viewer.erl b/lib/observer/src/crashdump_viewer.erl
index 51ff69fd69..d0c14db486 100644
--- a/lib/observer/src/crashdump_viewer.erl
+++ b/lib/observer/src/crashdump_viewer.erl
@@ -26,10 +26,25 @@
 %% Tables
 %% ------
 %% cdv_dump_index_table: This table holds all tags read from the
-%% crashdump.  Each tag indicates where the information about a
-%% specific item starts.  The table entry for a tag includes the start
-%% position for this item-information. In a crash dump file, all tags
-%% start with a "=" at the beginning of a line.
+%% crashdump, except the 'binary' tag.  Each tag indicates where the
+%% information about a specific item starts.  The table entry for a
+%% tag includes the start position for this item-information. In a
+%% crash dump file, all tags start with a "=" at the beginning of a
+%% line.
+%%
+%% cdv_binary_index_table: This table holds all 'binary' tags. The hex
+%% address for each binary is converted to its integer value before
+%% storing Address -> Start Position in this table. The hex value of
+%% the address is never used for lookup.
+%%
+%% cdv_reg_proc_table: This table holds mappings between pid and
+%% registered name. This is used for timers and monitors.
+%%
+%% cdv_heap_file_chars: For each 'proc_heap' and 'literals' tag, this
+%% table contains the number of characters to read from the crash dump
+%% file. This is used for giving an indication in percent of the
+%% progress when parsing this data.
+%%
 %%
 %% Process state
 %% -------------
@@ -73,6 +88,9 @@
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2, 
 	 terminate/2, code_change/3]).
 
+%% Test support
+-export([get_dump_versions/0]).
+
 %% Debug support
 -export([debug/1,stop_debug/0]).
 
@@ -87,7 +105,10 @@
 			    % line_head/1 function can return
 -define(not_available,"N/A").
 -define(binary_size_progress_limit,10000).
+-define(max_dump_version,[0,5]).
 
+%% The value of the next define must be divisible by 4.
+-define(base64_chunk_size, (4*256)).
 
 %% All possible tags - use macros in order to avoid misspelling in the code
 -define(abort,abort).
@@ -95,6 +116,10 @@
 -define(allocator,allocator).
 -define(atoms,atoms).
 -define(binary,binary).
+-define(dirty_cpu_scheduler,dirty_cpu_scheduler).
+-define(dirty_cpu_run_queue,dirty_cpu_run_queue).
+-define(dirty_io_scheduler,dirty_io_scheduler).
+-define(dirty_io_run_queue,dirty_io_run_queue).
 -define(ende,ende).
 -define(erl_crash_dump,erl_crash_dump).
 -define(ets,ets).
@@ -104,6 +129,7 @@
 -define(index_table,index_table).
 -define(instr_data,instr_data).
 -define(internal_ets,internal_ets).
+-define(literals,literals).
 -define(loaded_modules,loaded_modules).
 -define(memory,memory).
 -define(memory_map,memory_map).
@@ -125,6 +151,7 @@
 
 
 -record(state,{file,dump_vsn,wordsize=4,num_atoms="unknown"}).
+-record(dec_opts, {bin_addr_adj=0,base64=true}).
 
 %%%-----------------------------------------------------------------
 %%% Debugging
@@ -293,6 +320,11 @@ port(Id) ->
 expand_binary(Pos) ->
     call({expand_binary,Pos}).
 
+%%%-----------------------------------------------------------------
+%%% For testing only - called from crashdump_viewer_SUITE
+get_dump_versions() ->
+    call(get_dump_versions).
+
 %%====================================================================
 %% Server functions
 %%====================================================================
@@ -342,10 +374,12 @@ handle_call(general_info,_From,State=#state{file=File}) ->
     ets:insert(cdv_reg_proc_table,
 	       {cdv_dump_node_name,GenInfo#general_info.node_name}),
     {reply,{ok,GenInfo,TW},State#state{wordsize=WS, num_atoms=NumAtoms}};
-handle_call({expand_binary,{Offset,Size,Pos}},_From,State=#state{file=File}) ->
+handle_call({expand_binary,{Offset,Size,Pos}},_From,
+            #state{file=File,dump_vsn=DumpVsn}=State) ->
     Fd = open(File),
     pos_bof(Fd,Pos),
-    {Bin,_Line} = get_binary(Offset,Size,bytes(Fd)),
+    DecodeOpts = get_decode_opts(DumpVsn),
+    {Bin,_Line} = get_binary(Offset,Size,bytes(Fd),DecodeOpts),
     close(Fd),
     {reply,{ok,Bin},State};
 handle_call(procs_summary,_From,State=#state{file=File,wordsize=WS}) ->
@@ -418,9 +452,11 @@ handle_call(loaded_mods,_From,State=#state{file=File}) ->
     TW = truncated_warning([?mod]),
     {_CC,_OC,Mods} = loaded_mods(File),
     {reply,{ok,Mods,TW},State};
-handle_call({loaded_mod_details,Mod},_From,State=#state{file=File}) ->
+handle_call({loaded_mod_details,Mod},_From,
+            #state{dump_vsn=DumpVsn,file=File}=State) ->
     TW = truncated_warning([{?mod,Mod}]),
-    ModInfo = get_loaded_mod_details(File,Mod),
+    DecodeOpts = get_decode_opts(DumpVsn),
+    ModInfo = get_loaded_mod_details(File,Mod,DecodeOpts),
     {reply,{ok,ModInfo,TW},State};
 handle_call(funs,_From,State=#state{file=File}) ->
     TW = truncated_warning([?fu]),
@@ -454,8 +490,9 @@ handle_call(index_tables,_From,State=#state{file=File}) ->
 handle_call(schedulers,_From,State=#state{file=File}) ->
     Schedulers=schedulers(File),
     TW = truncated_warning([?scheduler]),
-    {reply,{ok,Schedulers,TW},State}.
-
+    {reply,{ok,Schedulers,TW},State};
+handle_call(get_dump_versions,_From,State=#state{dump_vsn=DumpVsn}) ->
+    {reply,{ok,{?max_dump_version,DumpVsn}},State}.
 
 
 %%--------------------------------------------------------------------
@@ -780,11 +817,12 @@ parse_vsn_str(Str,WS) ->
 
 
 %%%-----------------------------------------------------------------
-%%% Traverse crash dump and insert index in table for each heading
-%%%
-%%% Progress is reported during the time and MUST be checked with
-%%% crashdump_viewer:get_progress/0 until it returns {ok,done}.
+%%% Traverse crash dump and insert index in table for each heading.
+%%% Progress is reported during the time.
 do_read_file(File) ->
+    erase(?literals),                           %Clear literal cache.
+    put(truncated,false),                       %Not truncated (yet).
+    erase(truncated_reason),                    %Not truncated (yet).
     case file:read_file_info(File) of
 	{ok,#file_info{type=regular,
 		       access=FileA,
@@ -796,17 +834,21 @@ do_read_file(File) ->
 		    {Tag,Id,Rest,N1} = tag(Fd,TagAndRest,1),
 		    case Tag of
 			?erl_crash_dump ->
-			    reset_tables(),
-			    insert_index(Tag,Id,N1+1),
-			    put_last_tag(Tag,""),
-                            DumpVsn = [list_to_integer(L) ||
-                                          L<-string:lexemes(Id,".")],
-                            AddrAdj = get_bin_addr_adj(DumpVsn),
-                            indexify(Fd,AddrAdj,Rest,N1),
-			    end_progress(),
-			    check_if_truncated(),
-			    close(Fd),
-                            {ok,DumpVsn};
+                            case check_dump_version(Id) of
+                                {ok,DumpVsn} ->
+                                    reset_tables(),
+                                    insert_index(Tag,Id,N1+1),
+                                    put_last_tag(Tag,""),
+                                    DecodeOpts = get_decode_opts(DumpVsn),
+                                    indexify(Fd,DecodeOpts,Rest,N1),
+                                    end_progress(),
+                                    check_if_truncated(),
+                                    close(Fd),
+                                    {ok,DumpVsn};
+                                Error ->
+                                    close(Fd),
+                                    Error
+                            end;
 			_Other ->
 			    R = io_lib:format(
 				  "~ts is not an Erlang crash dump~n",
@@ -834,7 +876,19 @@ do_read_file(File) ->
 	    {error,R}
     end.
 
-indexify(Fd,AddrAdj,Bin,N) ->
+check_dump_version(Vsn) ->
+    DumpVsn = [list_to_integer(L) || L<-string:lexemes(Vsn,".")],
+    if DumpVsn > ?max_dump_version ->
+            Info =
+                "This Crashdump Viewer is too old for the given "
+                "Erlang crash dump. Please use a newer version of "
+                "Crashdump Viewer.",
+            {error,Info};
+       true ->
+            {ok,DumpVsn}
+    end.
+
+indexify(Fd,DecodeOpts,Bin,N) ->
     case binary:match(Bin,<<"\n=">>) of
 	{Start,Len} ->
 	    Pos = Start+Len,
@@ -847,7 +901,7 @@ indexify(Fd,AddrAdj,Bin,N) ->
                     %% order to minimize lookup time. Key is the
                     %% translated address.
                     {HexAddr,_} = get_hex(Id),
-                    Addr = HexAddr bor AddrAdj,
+                    Addr = HexAddr bor DecodeOpts#dec_opts.bin_addr_adj,
                     insert_binary_index(Addr,NewPos);
                 _ ->
                     insert_index(Tag,Id,NewPos)
@@ -856,9 +910,22 @@ indexify(Fd,AddrAdj,Bin,N) ->
                 {?proc_heap,LastId} ->
                     [{_,LastPos}] = lookup_index(?proc_heap,LastId),
                     ets:insert(cdv_heap_file_chars,{LastId,N+Start+1-LastPos});
+                {?literals,[]} ->
+                    case get(truncated_reason) of
+                        undefined ->
+                            [{_,LastPos}] = lookup_index(?literals,[]),
+                            ets:insert(cdv_heap_file_chars,
+                                       {literals,N+Start+1-LastPos});
+                        _ ->
+                            %% Literals are truncated. Make sure we never
+                            %% attempt to read in the literals. (Heaps that
+                            %% references literals will show markers for
+                            %% incomplete heaps, but will otherwise work.)
+                            delete_index(?literals, [])
+                    end;
                 _ -> ok
             end,
-	    indexify(Fd,AddrAdj,Rest,N1);
+	    indexify(Fd,DecodeOpts,Rest,N1);
 	nomatch ->
 	    case progress_read(Fd) of
 		{ok,Chunk0} when is_binary(Chunk0) ->
@@ -869,7 +936,7 @@ indexify(Fd,AddrAdj,Bin,N) ->
 			    _ ->
 				{Chunk0,N+byte_size(Bin)}
 			end,
-		    indexify(Fd,AddrAdj,Chunk,N1);
+		    indexify(Fd,DecodeOpts,Chunk,N1);
 		eof ->
 		    eof
 	    end
@@ -908,6 +975,7 @@ check_if_truncated() ->
 find_truncated_proc({Tag,_Id}) when Tag==?atoms;
                                     Tag==?binary;
                                     Tag==?instr_data;
+                                    Tag==?literals;
                                     Tag==?memory_status;
                                     Tag==?memory_map ->
     put(truncated_proc,false);
@@ -1065,7 +1133,7 @@ get_proc_details(File,Pid,WS,DumpVsn) ->
 	    {{Stack,MsgQ,Dict},TW} =
 		case truncated_warning([{?proc,Pid}]) of
 		    [] ->
-			{expand_memory(Fd,Pid,DumpVsn),[]};
+                        expand_memory(Fd,Pid,DumpVsn);
 		    TW0 ->
 			{{[],[],[]},TW0}
 		end,
@@ -1158,6 +1226,18 @@ all_procinfo(Fd,Fun,Proc,WS,LineHead) ->
 	"OldHeap unused" ->
 	    Bytes = list_to_integer(bytes(Fd))*WS,
 	    get_procinfo(Fd,Fun,Proc#proc{old_heap_unused=Bytes},WS);
+	"BinVHeap" ->
+	    Bytes = list_to_integer(bytes(Fd))*WS,
+	    get_procinfo(Fd,Fun,Proc#proc{bin_vheap=Bytes},WS);
+	"OldBinVHeap" ->
+	    Bytes = list_to_integer(bytes(Fd))*WS,
+	    get_procinfo(Fd,Fun,Proc#proc{old_bin_vheap=Bytes},WS);
+	"BinVHeap unused" ->
+	    Bytes = list_to_integer(bytes(Fd))*WS,
+	    get_procinfo(Fd,Fun,Proc#proc{bin_vheap_unused=Bytes},WS);
+	"OldBinVHeap unused" ->
+	    Bytes = list_to_integer(bytes(Fd))*WS,
+	    get_procinfo(Fd,Fun,Proc#proc{old_bin_vheap_unused=Bytes},WS);
 	"New heap start" ->
 	    get_procinfo(Fd,Fun,Proc#proc{new_heap_start=bytes(Fd)},WS);
 	"New heap top" ->
@@ -1176,7 +1256,7 @@ all_procinfo(Fd,Fun,Proc,WS,LineHead) ->
 	"Last calls" ->
 	    get_procinfo(Fd,Fun,Proc#proc{last_calls=get_last_calls(Fd)},WS);
 	"Link list" ->
-	    {Links,Monitors,MonitoredBy} = parse_link_list(bytes(Fd),[],[],[]),
+	    {Links,Monitors,MonitoredBy} = get_link_list(Fd),
 	    get_procinfo(Fd,Fun,Proc#proc{links=Links,
 					  monitors=Monitors,
 					  mon_by=MonitoredBy},WS);
@@ -1258,86 +1338,64 @@ get_last_calls(Fd,<<>>,Acc,Lines) ->
 	    lists:reverse(Lines,[byte_list_to_string(lists:reverse(Acc))])
     end.
 
-parse_link_list([SB|Str],Links,Monitors,MonitoredBy) when SB==$[; SB==$] ->
-    parse_link_list(Str,Links,Monitors,MonitoredBy);
-parse_link_list("#Port"++_=Str,Links,Monitors,MonitoredBy) ->
-    {Link,Rest} = parse_port(Str),
-    parse_link_list(Rest,[Link|Links],Monitors,MonitoredBy);
-parse_link_list("<"++_=Str,Links,Monitors,MonitoredBy) ->
-    {Link,Rest} = parse_pid(Str),
-    parse_link_list(Rest,[Link|Links],Monitors,MonitoredBy);
-parse_link_list("{to,"++Str,Links,Monitors,MonitoredBy) ->
-    {Mon,Rest} = parse_monitor(Str),
-    parse_link_list(Rest,Links,[Mon|Monitors],MonitoredBy);
-parse_link_list("{from,"++Str,Links,Monitors,MonitoredBy) ->
-    {Mon,Rest} = parse_monitor(Str),
-    parse_link_list(Rest,Links,Monitors,[Mon|MonitoredBy]);
-parse_link_list(", "++Rest,Links,Monitors,MonitoredBy) ->
-    parse_link_list(Rest,Links,Monitors,MonitoredBy);
-parse_link_list([],Links,Monitors,MonitoredBy) ->
-    {lists:reverse(Links),lists:reverse(Monitors),lists:reverse(MonitoredBy)};
-parse_link_list(Unexpected,Links,Monitors,MonitoredBy) ->
-    io:format("WARNING: found unexpected data in link list:~n~ts~n",[Unexpected]),
-    parse_link_list([],Links,Monitors,MonitoredBy).
-
-
-parse_port(Str) ->
-    {Port,Rest} = parse_link(Str,[]),
-    {{Port,Port},Rest}.
-
-parse_pid(Str) ->
-    {Pid,Rest} = parse_link(Str,[]),
-    {{Pid,Pid},Rest}.
-
-parse_monitor("{"++Str) ->
-    %% Named process
-    {Name,Node,Rest1} = parse_name_node(Str,[]),
-    Pid = get_pid_from_name(Name,Node),
-    case parse_link(string:trim(Rest1,leading,","),[]) of
-	{Ref,"}"++Rest2} ->
-	    %% Bug in break.c - prints an extra "}" for remote
-	    %% nodes... thus the strip
-	    {{Pid,"{"++Name++","++Node++"} ("++Ref++")"},
-	     string:trim(Rest2,leading,"}")};
-	{Ref,[]} ->
-	    {{Pid,"{"++Name++","++Node++"} ("++Ref++")"},[]}
-    end;
-parse_monitor(Str) ->
-    case parse_link(Str,[]) of
-	{Pid,","++Rest1} ->
-	    case parse_link(Rest1,[]) of
-		{Ref,"}"++Rest2} ->
-		    {{Pid,Pid++" ("++Ref++")"},Rest2};
-		{Ref,[]} ->
-		    {{Pid,Pid++" ("++Ref++")"},[]}
-	    end;
-	{Pid,[]} ->
-	    {{Pid,Pid++" (unknown_ref)"},[]}
+get_link_list(Fd) ->
+    case get_chunk(Fd) of
+	{ok,<<"[",Bin/binary>>} ->
+            #{links:=Links,
+              mons:=Monitors,
+              mon_by:=MonitoredBy} =
+                get_link_list(Fd,Bin,#{links=>[],mons=>[],mon_by=>[]}),
+            {lists:reverse(Links),
+             lists:reverse(Monitors),
+             lists:reverse(MonitoredBy)};
+        eof ->
+            {[],[],[]}
+    end.
+
+get_link_list(Fd,<<NL:8,_/binary>>=Bin,Acc) when NL=:=$\r; NL=:=$\n->
+    skip(Fd,Bin),
+    Acc;
+get_link_list(Fd,Bin,Acc) ->
+    case binary:split(Bin,[<<", ">>,<<"]">>]) of
+        [Link,Rest] ->
+            get_link_list(Fd,Rest,get_link(Link,Acc));
+        [Incomplete] ->
+            case get_chunk(Fd) of
+                {ok,More} ->
+                    get_link_list(Fd,<<Incomplete/binary,More/binary>>,Acc);
+                eof ->
+                    Acc
+            end
     end.
 
-parse_link(">"++Rest,Acc) ->
-    {lists:reverse(Acc,">"),Rest};
-parse_link([H|T],Acc) ->
-    parse_link(T,[H|Acc]);
-parse_link([],Acc) ->
-    %% truncated
-    {lists:reverse(Acc),[]}.
-
-parse_name_node(","++Rest,Name) ->
-    parse_name_node(Rest,Name,[]);
-parse_name_node([H|T],Name) ->
-    parse_name_node(T,[H|Name]);
-parse_name_node([],Name) ->
-    %% truncated
-    {lists:reverse(Name),[],[]}.
-
-parse_name_node("}"++Rest,Name,Node) ->
-    {lists:reverse(Name),lists:reverse(Node),Rest};
-parse_name_node([H|T],Name,Node) ->
-    parse_name_node(T,Name,[H|Node]);
-parse_name_node([],Name,Node) ->
-    %% truncated
-    {lists:reverse(Name),lists:reverse(Node),[]}.
+get_link(<<"#Port",_/binary>>=PortBin,#{links:=Links}=Acc) ->
+    PortStr = binary_to_list(PortBin),
+    Acc#{links=>[{PortStr,PortStr}|Links]};
+get_link(<<"<",_/binary>>=PidBin,#{links:=Links}=Acc) ->
+    PidStr = binary_to_list(PidBin),
+    Acc#{links=>[{PidStr,PidStr}|Links]};
+get_link(<<"{to,",Bin/binary>>,#{mons:=Monitors}=Acc) ->
+    Acc#{mons=>[parse_monitor(Bin)|Monitors]};
+get_link(<<"{from,",Bin/binary>>,#{mon_by:=MonitoredBy}=Acc) ->
+    Acc#{mon_by=>[parse_monitor(Bin)|MonitoredBy]};
+get_link(Unexpected,Acc) ->
+    io:format("WARNING: found unexpected data in link list:~n~ts~n",[Unexpected]),
+    Acc.
+
+parse_monitor(MonBin) ->
+    case binary:split(MonBin,[<<",">>,<<"{">>,<<"}">>],[global]) of
+        [PidBin,RefBin,<<>>] ->
+            PidStr = binary_to_list(PidBin),
+            RefStr = binary_to_list(RefBin),
+            {PidStr,PidStr++" ("++RefStr++")"};
+        [<<>>,NameBin,NodeBin,<<>>,RefBin,<<>>] ->
+            %% Named process
+            NameStr = binary_to_list(NameBin),
+            NodeStr = binary_to_list(NodeBin),
+            PidStr = get_pid_from_name(NameStr,NodeStr),
+            RefStr = binary_to_list(RefBin),
+            {PidStr,"{"++NameStr++","++NodeStr++"} ("++RefStr++")"}
+    end.
 
 get_pid_from_name(Name,Node) ->
     case ets:lookup(cdv_reg_proc_table,cdv_dump_node_name) of
@@ -1384,50 +1442,85 @@ maybe_other_node2(Channel) ->
 
 
 expand_memory(Fd,Pid,DumpVsn) ->
-    BinAddrAdj = get_bin_addr_adj(DumpVsn),
+    DecodeOpts = get_decode_opts(DumpVsn),
     put(fd,Fd),
-    Dict = read_heap(Fd,Pid,BinAddrAdj,gb_trees:empty()),
-    Expanded = {read_stack_dump(Fd,Pid,BinAddrAdj,Dict),
-		read_messages(Fd,Pid,BinAddrAdj,Dict),
-		read_dictionary(Fd,Pid,BinAddrAdj,Dict)},
+    Dict0 = case get(?literals) of
+                undefined ->
+                    Literals = read_literals(Fd,DecodeOpts),
+                    put(?literals,Literals),
+                    put(fd,Fd),
+                    Literals;
+                Literals ->
+                    Literals
+            end,
+    Dict = read_heap(Fd,Pid,DecodeOpts,Dict0),
+    Expanded = {read_stack_dump(Fd,Pid,DecodeOpts,Dict),
+		read_messages(Fd,Pid,DecodeOpts,Dict),
+		read_dictionary(Fd,Pid,DecodeOpts,Dict)},
     erase(fd),
-    Expanded.
-
-%%%-----------------------------------------------------------------
-%%% This is a workaround for a bug in dump versions prior to 0.3:
-%%% Addresses were truncated to 32 bits. This could cause binaries to
-%%% get the same address as heap terms in the dump. To work around it
-%%% we always store binaries on very high addresses in the gb_tree.
-get_bin_addr_adj(DumpVsn) when DumpVsn < [0,3] ->
-    16#f bsl 64;
-get_bin_addr_adj(_) ->
-    0.
+    IncompleteWarning =
+        case erase(incomplete_heap) of
+            undefined ->
+                [];
+            true ->
+                ["WARNING: This process has an incomplete heap. "
+                 "Some information might be missing."]
+        end,
+    {Expanded,IncompleteWarning}.
+
+read_literals(Fd,DecodeOpts) ->
+    case lookup_index(?literals,[]) of
+	[{_,Start}] ->
+            [{_,Chars}] = ets:lookup(cdv_heap_file_chars,literals),
+            init_progress("Reading literals",Chars),
+	    pos_bof(Fd,Start),
+	    read_heap(DecodeOpts,gb_trees:empty());
+        [] ->
+            gb_trees:empty()
+    end.
+
+get_decode_opts(DumpVsn) ->
+    BinAddrAdj = if
+                     DumpVsn < [0,3] ->
+                         %% This is a workaround for a bug in dump
+                         %% versions prior to 0.3: Addresses were
+                         %% truncated to 32 bits. This could cause
+                         %% binaries to get the same address as heap
+                         %% terms in the dump. To work around it we
+                         %% always store binaries on very high
+                         %% addresses in the gb_tree.
+                         16#f bsl 64;
+                     true ->
+                         0
+                 end,
+    Base64 = DumpVsn >= [0,5],
+    #dec_opts{bin_addr_adj=BinAddrAdj,base64=Base64}.
 
 %%%
 %%% Read top level section.
 %%%
 
-read_stack_dump(Fd,Pid,BinAddrAdj,Dict) ->
+read_stack_dump(Fd,Pid,DecodeOpts,Dict) ->
     case lookup_index(?proc_stack,Pid) of
 	[{_,Start}] ->
 	    pos_bof(Fd,Start),
-	    read_stack_dump1(Fd,BinAddrAdj,Dict,[]);
+	    read_stack_dump1(Fd,DecodeOpts,Dict,[]);
 	[] ->
 	    []
     end.
-read_stack_dump1(Fd,BinAddrAdj,Dict,Acc) ->
+read_stack_dump1(Fd,DecodeOpts,Dict,Acc) ->
     %% This function is never called if the dump is truncated in {?proc_heap,Pid}
     case bytes(Fd) of
 	"=" ++ _next_tag ->
 	    lists:reverse(Acc);
 	Line ->
-	    Stack = parse_top(Line,BinAddrAdj,Dict),
-	    read_stack_dump1(Fd,BinAddrAdj,Dict,[Stack|Acc])
+	    Stack = parse_top(Line,DecodeOpts,Dict),
+	    read_stack_dump1(Fd,DecodeOpts,Dict,[Stack|Acc])
     end.
 
-parse_top(Line0, BinAddrAdj, D) ->
+parse_top(Line0, DecodeOpts, D) ->
     {Label,Line1} = get_label(Line0),
-    {Term,Line,D} = parse_term(Line1, BinAddrAdj, D),
+    {Term,Line,D} = parse_term(Line1, DecodeOpts, D),
     [] = skip_blanks(Line),
     {Label,Term}.
 
@@ -1435,27 +1528,27 @@ parse_top(Line0, BinAddrAdj, D) ->
 %%% Read message queue.
 %%%
 
-read_messages(Fd,Pid,BinAddrAdj,Dict) ->
+read_messages(Fd,Pid,DecodeOpts,Dict) ->
     case lookup_index(?proc_messages,Pid) of
 	[{_,Start}] ->
 	    pos_bof(Fd,Start),
-	    read_messages1(Fd,BinAddrAdj,Dict,[]);
+	    read_messages1(Fd,DecodeOpts,Dict,[]);
 	[] ->
 	    []
     end.
-read_messages1(Fd,BinAddrAdj,Dict,Acc) ->
+read_messages1(Fd,DecodeOpts,Dict,Acc) ->
     %% This function is never called if the dump is truncated in {?proc_heap,Pid}
     case bytes(Fd) of
 	"=" ++ _next_tag ->
 	    lists:reverse(Acc);
 	Line ->
-	    Msg = parse_message(Line,BinAddrAdj,Dict),
-	    read_messages1(Fd,BinAddrAdj,Dict,[Msg|Acc])
+	    Msg = parse_message(Line,DecodeOpts,Dict),
+	    read_messages1(Fd,DecodeOpts,Dict,[Msg|Acc])
     end.
     
-parse_message(Line0, BinAddrAdj, D) ->
-    {Msg,":"++Line1,_} = parse_term(Line0, BinAddrAdj, D),
-    {Token,Line,_} = parse_term(Line1, BinAddrAdj, D),
+parse_message(Line0, DecodeOpts, D) ->
+    {Msg,":"++Line1,_} = parse_term(Line0, DecodeOpts, D),
+    {Token,Line,_} = parse_term(Line1, DecodeOpts, D),
     [] = skip_blanks(Line),
     {Msg,Token}.
     
@@ -1463,26 +1556,26 @@ parse_message(Line0, BinAddrAdj, D) ->
 %%% Read process dictionary
 %%%
 
-read_dictionary(Fd,Pid,BinAddrAdj,Dict) ->
+read_dictionary(Fd,Pid,DecodeOpts,Dict) ->
     case lookup_index(?proc_dictionary,Pid) of
 	[{_,Start}] ->
 	    pos_bof(Fd,Start),
-	    read_dictionary1(Fd,BinAddrAdj,Dict,[]);
+	    read_dictionary1(Fd,DecodeOpts,Dict,[]);
 	[] ->
 	    []
     end.
-read_dictionary1(Fd,BinAddrAdj,Dict,Acc) ->
+read_dictionary1(Fd,DecodeOpts,Dict,Acc) ->
     %% This function is never called if the dump is truncated in {?proc_heap,Pid}
     case bytes(Fd) of
 	"=" ++ _next_tag ->
 	    lists:reverse(Acc);
 	Line ->
-	    Msg = parse_dictionary(Line,BinAddrAdj,Dict),
-	    read_dictionary1(Fd,BinAddrAdj,Dict,[Msg|Acc])
+	    Msg = parse_dictionary(Line,DecodeOpts,Dict),
+	    read_dictionary1(Fd,DecodeOpts,Dict,[Msg|Acc])
     end.
     
-parse_dictionary(Line0, BinAddrAdj, D) ->
-    {Entry,Line,_} = parse_term(Line0, BinAddrAdj, D),
+parse_dictionary(Line0, DecodeOpts, D) ->
+    {Entry,Line,_} = parse_term(Line0, DecodeOpts, D),
     [] = skip_blanks(Line),
     Entry.
     
@@ -1490,18 +1583,18 @@ parse_dictionary(Line0, BinAddrAdj, D) ->
 %%% Read heap data.
 %%%
 
-read_heap(Fd,Pid,BinAddrAdj,Dict0) ->
+read_heap(Fd,Pid,DecodeOpts,Dict0) ->
     case lookup_index(?proc_heap,Pid) of
 	[{_,Pos}] ->
             [{_,Chars}] = ets:lookup(cdv_heap_file_chars,Pid),
             init_progress("Reading process heap",Chars),
 	    pos_bof(Fd,Pos),
-	    read_heap(BinAddrAdj,Dict0);
+	    read_heap(DecodeOpts,Dict0);
 	[] ->
 	    Dict0
     end.
 
-read_heap(BinAddrAdj,Dict0) ->
+read_heap(DecodeOpts,Dict0) ->
     %% This function is never called if the dump is truncated in {?proc_heap,Pid}
     case get(fd) of
 	end_of_heap ->
@@ -1515,14 +1608,14 @@ read_heap(BinAddrAdj,Dict0) ->
 		    Dict0;
 		Line ->
                     update_progress(length(Line)+1),
-		    Dict = parse(Line,BinAddrAdj,Dict0),
-		    read_heap(BinAddrAdj,Dict)
+		    Dict = parse(Line,DecodeOpts,Dict0),
+		    read_heap(DecodeOpts,Dict)
 	    end
     end.
 
-parse(Line0, BinAddrAdj, Dict0) ->
+parse(Line0, DecodeOpts, Dict0) ->
     {Addr,":"++Line1} = get_hex(Line0),
-    {_Term,Line,Dict} = parse_heap_term(Line1, Addr, BinAddrAdj, Dict0),
+    {_Term,Line,Dict} = parse_heap_term(Line1, Addr, DecodeOpts, Dict0),
     [] = skip_blanks(Line),
     Dict.
 
@@ -1555,6 +1648,10 @@ port_to_tuple("#Port<"++Port) ->
 
 get_portinfo(Fd,Port) ->
     case line_head(Fd) of
+        "State" ->
+	    get_portinfo(Fd,Port#port{state=bytes(Fd)});
+        "Task Flags" ->
+	    get_portinfo(Fd,Port#port{task_flags=bytes(Fd)});
 	"Slot" ->
 	    %% stored as integer so we can sort on it
 	    get_portinfo(Fd,Port#port{slot=list_to_integer(bytes(Fd))});
@@ -1579,6 +1676,10 @@ get_portinfo(Fd,Port) ->
 			    {Pid,Pid++" ("++Ref++")"}
 			end || Mon <- Monitors0],
 	    get_portinfo(Fd,Port#port{monitors=Monitors});
+        "Suspended" ->
+	    Pids = split_pid_list_no_space(bytes(Fd)),
+	    Suspended = [{Pid,Pid} || Pid <- Pids],
+	    get_portinfo(Fd,Port#port{suspended=Suspended});
 	"Port controls linked-in driver" ->
 	    Str = lists:flatten(["Linked in driver: " | string(Fd)]),
 	    get_portinfo(Fd,Port#port{controls=Str});
@@ -1594,6 +1695,15 @@ get_portinfo(Fd,Port) ->
 	"Port is UNIX fd not opened by emulator" ->
 	    Str = lists:flatten(["UNIX fd not opened by emulator: "| string(Fd)]),
 	    get_portinfo(Fd,Port#port{controls=Str});
+        "Input" ->
+	    get_portinfo(Fd,Port#port{input=list_to_integer(bytes(Fd))});
+        "Output" ->
+	    get_portinfo(Fd,Port#port{output=list_to_integer(bytes(Fd))});
+        "Queue" ->
+	    get_portinfo(Fd,Port#port{queue=list_to_integer(bytes(Fd))});
+        "Port Data" ->
+	    get_portinfo(Fd,Port#port{port_data=string(Fd)});
+
 	"=" ++ _next_tag ->
 	    Port;
 	Other ->
@@ -1844,12 +1954,15 @@ get_nodeinfo(Fd,Nod) ->
 
 %%-----------------------------------------------------------------
 %% Page with details about one loaded modules
-get_loaded_mod_details(File,Mod) ->
+get_loaded_mod_details(File,Mod,DecodeOpts) ->
     [{_,Start}] = lookup_index(?mod,Mod),
     Fd = open(File),
     pos_bof(Fd,Start),
     InitLM = #loaded_mod{mod=Mod,old_size="No old code exists"},
-    ModInfo = get_loaded_mod_info(Fd,InitLM,fun all_modinfo/3),
+    Fun = fun(F, LM, LineHead) ->
+                  all_modinfo(F, LM, LineHead, DecodeOpts)
+          end,
+    ModInfo = get_loaded_mod_info(Fd,InitLM,Fun),
     close(Fd),
     ModInfo.
 
@@ -1907,59 +2020,48 @@ get_loaded_mod_info(Fd,LM,Fun) ->
 
 main_modinfo(_Fd,LM,_LineHead) ->
     LM.
-all_modinfo(Fd,LM,LineHead) ->
+all_modinfo(Fd,LM,LineHead,DecodeOpts) ->
     case LineHead of
 	"Current attributes" ->
-	    Str = hex_to_str(bytes(Fd,"")),
+            Str = get_attribute(Fd, DecodeOpts),
 	    LM#loaded_mod{current_attrib=Str};
 	"Current compilation info" ->
-	    Str = hex_to_str(bytes(Fd,"")),
+            Str = get_attribute(Fd, DecodeOpts),
 	    LM#loaded_mod{current_comp_info=Str};
 	"Old attributes" ->
-	    Str = hex_to_str(bytes(Fd,"")),
+            Str = get_attribute(Fd, DecodeOpts),
 	    LM#loaded_mod{old_attrib=Str};
 	"Old compilation info" ->
-	    Str = hex_to_str(bytes(Fd,"")),
+            Str = get_attribute(Fd, DecodeOpts),
 	    LM#loaded_mod{old_comp_info=Str};
 	Other ->
 	    unexpected(Fd,Other,"loaded modules info"),
 	    LM
     end.
-    
 
-hex_to_str(Hex) ->
-    Term = hex_to_term(Hex,[]),
+get_attribute(Fd, DecodeOpts) ->
+    Term = do_get_attribute(Fd, DecodeOpts),
     io_lib:format("~tp~n",[Term]).
 
-hex_to_term([X,Y|Hex],Acc) ->
-    MS = hex_to_dec([X]),
-    LS = hex_to_dec([Y]),
-    Z = 16*MS+LS,
-    hex_to_term(Hex,[Z|Acc]);
-hex_to_term([],Acc) ->
-    Bin = list_to_binary(lists:reverse(Acc)),
-    case catch binary_to_term(Bin) of
-	{'EXIT',_Reason} ->
-	    {"WARNING: The term is probably truncated!",
-	     "I can not do binary_to_term.",
-	     Bin};
-	Term ->
-	    Term
-    end;
-hex_to_term(Rest,Acc) ->
-    {"WARNING: The term is probably truncated!",
-     "I can not convert hex to term.",
-     Rest,list_to_binary(lists:reverse(Acc))}.
-
-
-hex_to_dec("F") -> 15;
-hex_to_dec("E") -> 14;
-hex_to_dec("D") -> 13;
-hex_to_dec("C") -> 12;
-hex_to_dec("B") -> 11;
-hex_to_dec("A") -> 10;
-hex_to_dec(N) -> list_to_integer(N).
-    
+do_get_attribute(Fd, DecodeOpts) ->
+    Bytes = bytes(Fd, ""),
+    try get_binary(Bytes, DecodeOpts) of
+        {Bin,_} ->
+            try binary_to_term(Bin) of
+                Term ->
+                    Term
+            catch
+                _:_ ->
+                    {"WARNING: The term is probably truncated!",
+                     "I cannot do binary_to_term/1.",
+                     Bin}
+            end
+    catch
+        _:_ ->
+            {"WARNING: The term is probably truncated!",
+             "I cannot convert to binary.",
+             Bytes}
+    end.
 
 %%-----------------------------------------------------------------
 %% Page with list of all funs
@@ -2434,73 +2536,142 @@ get_indextableinfo1(Fd,IndexTable) ->
 %%-----------------------------------------------------------------
 %% Page with scheduler table information
 schedulers(File) ->
-    case lookup_index(?scheduler) of
-	[] ->
-	    [];
-	Schedulers ->
-	    Fd = open(File),
-	    R = lists:map(fun({Name,Start}) ->
-				  get_schedulerinfo(Fd,Name,Start)
-			  end,
-			  Schedulers),
-	    close(Fd),
-	    R
-    end.
+    Fd = open(File),
+
+    Schds0 = case lookup_index(?scheduler) of
+                 [] ->
+                     [];
+                 Normals ->
+                     [{Normals, #sched{type=normal}}]
+             end,
+    Schds1 = case lookup_index(?dirty_cpu_scheduler) of
+                 [] ->
+                     Schds0;
+                 DirtyCpus ->
+                     [{DirtyCpus, get_dirty_runqueue(Fd, ?dirty_cpu_run_queue)}
+                      | Schds0]
+             end,
+    Schds2 = case lookup_index(?dirty_io_scheduler) of
+                 [] ->
+                     Schds1;
+                 DirtyIos ->
+                     [{DirtyIos, get_dirty_runqueue(Fd, ?dirty_io_run_queue)}
+                      | Schds1]
+             end,
+
+    R = schedulers1(Fd, Schds2, []),
+    close(Fd),
+    R.
 
-get_schedulerinfo(Fd,Name,Start) ->
+schedulers1(_Fd, [], Acc) ->
+    Acc;
+schedulers1(Fd, [{Scheds,Sched0} | Tail], Acc0) ->
+    Acc1 = lists:foldl(fun({Name,Start}, AccIn) ->
+                               [get_schedulerinfo(Fd,Name,Start,Sched0) | AccIn]
+                       end,
+                       Acc0,
+                       Scheds),
+    schedulers1(Fd, Tail, Acc1).
+
+get_schedulerinfo(Fd,Name,Start,Sched0) ->
     pos_bof(Fd,Start),
-    get_schedulerinfo1(Fd,#sched{name=Name}).
+    get_schedulerinfo1(Fd,Sched0#sched{name=list_to_integer(Name)}).
 
-get_schedulerinfo1(Fd,Sched=#sched{details=Ds}) ->
+sched_type(?dirty_cpu_run_queue) -> dirty_cpu;
+sched_type(?dirty_io_run_queue) ->  dirty_io.
+
+get_schedulerinfo1(Fd, Sched) ->
+    case get_schedulerinfo2(Fd, Sched) of
+        {more, Sched2} ->
+            get_schedulerinfo1(Fd, Sched2);
+        {done, Sched2} ->
+            Sched2
+    end.
+
+get_schedulerinfo2(Fd, Sched=#sched{details=Ds}) ->
     case line_head(Fd) of
 	"Current Process" ->
-	    get_schedulerinfo1(Fd,Sched#sched{process=bytes(Fd, "None")});
+	    {more, Sched#sched{process=bytes(Fd, "None")}};
 	"Current Port" ->
-	    get_schedulerinfo1(Fd,Sched#sched{port=bytes(Fd, "None")});
+	    {more, Sched#sched{port=bytes(Fd, "None")}};
+
+	"Scheduler Sleep Info Flags" ->
+	    {more, Sched#sched{details=Ds#{sleep_info=>bytes(Fd, "None")}}};
+	"Scheduler Sleep Info Aux Work" ->
+	    {more, Sched#sched{details=Ds#{sleep_aux=>bytes(Fd, "None")}}};
+
+	"Current Process State" ->
+	    {more, Sched#sched{details=Ds#{currp_state=>bytes(Fd)}}};
+	"Current Process Internal State" ->
+	    {more, Sched#sched{details=Ds#{currp_int_state=>bytes(Fd)}}};
+	"Current Process Program counter" ->
+	    {more, Sched#sched{details=Ds#{currp_prg_cnt=>string(Fd)}}};
+	"Current Process CP" ->
+	    {more, Sched#sched{details=Ds#{currp_cp=>string(Fd)}}};
+	"Current Process Limited Stack Trace" ->
+	    %% If there shall be last in scheduler information block
+	    {done, Sched#sched{details=get_limited_stack(Fd, 0, Ds)}};
+
+	"=" ++ _next_tag ->
+            {done, Sched};
+
+	Other ->
+            case Sched#sched.type of
+                normal ->
+                    get_runqueue_info2(Fd, Other, Sched);
+                _ ->
+                    unexpected(Fd,Other,"dirty scheduler information"),
+                    {done, Sched}
+            end
+    end.
+
+get_dirty_runqueue(Fd, Tag) ->
+    case lookup_index(Tag) of
+        [{_, Start}] ->
+            pos_bof(Fd,Start),
+            get_runqueue_info1(Fd,#sched{type=sched_type(Tag)});
+        [] ->
+            #sched{}
+    end.
+
+get_runqueue_info1(Fd, Sched) ->
+    case get_runqueue_info2(Fd, line_head(Fd), Sched) of
+        {more, Sched2} ->
+            get_runqueue_info1(Fd, Sched2);
+        {done, Sched2} ->
+            Sched2
+    end.
+
+get_runqueue_info2(Fd, LineHead, Sched=#sched{details=Ds}) ->
+    case LineHead of
 	"Run Queue Max Length" ->
 	    RQMax = list_to_integer(bytes(Fd)),
 	    RQ = RQMax + Sched#sched.run_q,
-	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_max=>RQMax}});
+	    {more, Sched#sched{run_q=RQ, details=Ds#{runq_max=>RQMax}}};
 	"Run Queue High Length" ->
 	    RQHigh = list_to_integer(bytes(Fd)),
 	    RQ = RQHigh + Sched#sched.run_q,
-	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_high=>RQHigh}});
+	    {more, Sched#sched{run_q=RQ, details=Ds#{runq_high=>RQHigh}}};
 	"Run Queue Normal Length" ->
 	    RQNorm = list_to_integer(bytes(Fd)),
 	    RQ = RQNorm + Sched#sched.run_q,
-	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_norm=>RQNorm}});
+	    {more, Sched#sched{run_q=RQ, details=Ds#{runq_norm=>RQNorm}}};
 	"Run Queue Low Length" ->
 	    RQLow = list_to_integer(bytes(Fd)),
 	    RQ = RQLow + Sched#sched.run_q,
-	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_low=>RQLow}});
+	    {more, Sched#sched{run_q=RQ, details=Ds#{runq_low=>RQLow}}};
 	"Run Queue Port Length" ->
 	    RQ = list_to_integer(bytes(Fd)),
-	    get_schedulerinfo1(Fd,Sched#sched{port_q=RQ});
-
-	"Scheduler Sleep Info Flags" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{sleep_info=>bytes(Fd, "None")}});
-	"Scheduler Sleep Info Aux Work" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{sleep_aux=>bytes(Fd, "None")}});
+	    {more, Sched#sched{port_q=RQ}};
 
 	"Run Queue Flags" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{runq_flags=>bytes(Fd, "None")}});
+	    {more, Sched#sched{details=Ds#{runq_flags=>bytes(Fd, "None")}}};
 
-	"Current Process State" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_state=>bytes(Fd)}});
-	"Current Process Internal State" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_int_state=>bytes(Fd)}});
-	"Current Process Program counter" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_prg_cnt=>string(Fd)}});
-	"Current Process CP" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_cp=>string(Fd)}});
-	"Current Process Limited Stack Trace" ->
-	    %% If there shall be last in scheduler information block
-	    Sched#sched{details=get_limited_stack(Fd, 0, Ds)};
 	"=" ++ _next_tag ->
-	    Sched;
+            {done, Sched};
 	Other ->
 	    unexpected(Fd,Other,"scheduler information"),
-	    Sched
+	    {done, Sched}
     end.
 
 get_limited_stack(Fd, N, Ds) ->
@@ -2516,99 +2687,134 @@ get_limited_stack(Fd, N, Ds) ->
 %%%-----------------------------------------------------------------
 %%% Parse memory in crashdump version 0.1 and newer
 %%%
-parse_heap_term([$l|Line0], Addr, BinAddrAdj, D0) ->	%Cons cell.
-    {H,"|"++Line1,D1} = parse_term(Line0, BinAddrAdj, D0),
-    {T,Line,D2} = parse_term(Line1, BinAddrAdj, D1),
+parse_heap_term([$l|Line0], Addr, DecodeOpts, D0) ->	%Cons cell.
+    {H,"|"++Line1,D1} = parse_term(Line0, DecodeOpts, D0),
+    {T,Line,D2} = parse_term(Line1, DecodeOpts, D1),
     Term = [H|T],
     D = gb_trees:insert(Addr, Term, D2),
     {Term,Line,D};
-parse_heap_term([$t|Line0], Addr, BinAddrAdj, D) ->	%Tuple
+parse_heap_term([$t|Line0], Addr, DecodeOpts, D) ->	%Tuple
     {N,":"++Line} = get_hex(Line0),
-    parse_tuple(N, Line, Addr, BinAddrAdj, D, []);
-parse_heap_term([$F|Line0], Addr, _BinAddrAdj, D0) ->	%Float
+    parse_tuple(N, Line, Addr, DecodeOpts, D, []);
+parse_heap_term([$F|Line0], Addr, _DecodeOpts, D0) ->	%Float
     {N,":"++Line1} = get_hex(Line0),
     {Chars,Line} = get_chars(N, Line1),
     Term = list_to_float(Chars),
     D = gb_trees:insert(Addr, Term, D0),
     {Term,Line,D};
-parse_heap_term("B16#"++Line0, Addr, _BinAddrAdj, D0) -> %Positive big number.
+parse_heap_term("B16#"++Line0, Addr, _DecodeOpts, D0) -> %Positive big number.
     {Term,Line} = get_hex(Line0),
     D = gb_trees:insert(Addr, Term, D0),
     {Term,Line,D};
-parse_heap_term("B-16#"++Line0, Addr, _BinAddrAdj, D0) -> %Negative big number
+parse_heap_term("B-16#"++Line0, Addr, _DecodeOpts, D0) -> %Negative big number
     {Term0,Line} = get_hex(Line0),
     Term = -Term0,
     D = gb_trees:insert(Addr, Term, D0),
     {Term,Line,D};
-parse_heap_term("B"++Line0, Addr, _BinAddrAdj, D0) ->	%Decimal big num
+parse_heap_term("B"++Line0, Addr, _DecodeOpts, D0) ->	%Decimal big num
     case string:to_integer(Line0) of
 	{Int,Line} when is_integer(Int) ->
 	    D = gb_trees:insert(Addr, Int, D0),
 	    {Int,Line,D}
     end;
-parse_heap_term([$P|Line0], Addr, _BinAddrAdj, D0) ->	% External Pid.
+parse_heap_term([$P|Line0], Addr, _DecodeOpts, D0) ->	% External Pid.
     {Pid0,Line} = get_id(Line0),
     Pid = ['#CDVPid'|Pid0],
     D = gb_trees:insert(Addr, Pid, D0),
     {Pid,Line,D};
-parse_heap_term([$p|Line0], Addr, _BinAddrAdj, D0) ->   % External Port.
+parse_heap_term([$p|Line0], Addr, _DecodeOpts, D0) ->   % External Port.
     {Port0,Line} = get_id(Line0),
     Port = ['#CDVPort'|Port0],
     D = gb_trees:insert(Addr, Port, D0),
     {Port,Line,D};
-parse_heap_term("E"++Line0, Addr, _BinAddrAdj, D0) ->	%Term encoded in external format.
-    {Bin,Line} = get_binary(Line0),
+parse_heap_term("E"++Line0, Addr, DecodeOpts, D0) ->	%Term encoded in external format.
+    {Bin,Line} = get_binary(Line0, DecodeOpts),
     Term = binary_to_term(Bin),
     D = gb_trees:insert(Addr, Term, D0),
     {Term,Line,D};
-parse_heap_term("Yh"++Line0, Addr, _BinAddrAdj, D0) ->	%Heap binary.
-    {Term,Line} = get_binary(Line0),
+parse_heap_term("Yh"++Line0, Addr, DecodeOpts, D0) ->	%Heap binary.
+    {Term,Line} = get_binary(Line0, DecodeOpts),
     D = gb_trees:insert(Addr, Term, D0),
     {Term,Line,D};
-parse_heap_term("Yc"++Line0, Addr, BinAddrAdj, D0) ->	%Reference-counted binary.
+parse_heap_term("Yc"++Line0, Addr, DecodeOpts, D0) ->	%Reference-counted binary.
     {Binp0,":"++Line1} = get_hex(Line0),
     {Offset,":"++Line2} = get_hex(Line1),
     {Sz,Line} = get_hex(Line2),
-    Binp = Binp0 bor BinAddrAdj,
-    Term = case lookup_binary_index(Binp) of
-               [{_,Start}] -> cdvbin(Offset,Sz,{'#CDVBin',Start});
-	       [] -> '#CDVNonexistingBinary'
-	   end,
-    D = gb_trees:insert(Addr, Term, D0),
-    {Term,Line,D};
-parse_heap_term("Ys"++Line0, Addr, BinAddrAdj, D0) ->	%Sub binary.
+    Binp = Binp0 bor DecodeOpts#dec_opts.bin_addr_adj,
+    case lookup_binary_index(Binp) of
+        [{_,Start}] ->
+            SymbolicBin = {'#CDVBin',Start},
+            Term = cdvbin(Offset, Sz, SymbolicBin),
+            D1 = gb_trees:insert(Addr, Term, D0),
+            D = gb_trees:insert(Binp, SymbolicBin, D1),
+            {Term,Line,D};
+        [] ->
+            Term = '#CDVNonexistingBinary',
+            D1 = gb_trees:insert(Addr, Term, D0),
+            D = gb_trees:insert(Binp, Term, D1),
+            {Term,Line,D}
+    end;
+parse_heap_term("Ys"++Line0, Addr, DecodeOpts, D0) ->	%Sub binary.
     {Binp0,":"++Line1} = get_hex(Line0),
     {Offset,":"++Line2} = get_hex(Line1),
-    {Sz,Line} = get_hex(Line2),
-    Binp = Binp0 bor BinAddrAdj,
-    Term = case lookup_binary_index(Binp) of
-               [{_,Start}] -> cdvbin(Offset,Sz,{'#CDVBin',Start});
-	       [] ->
-		   %% Might it be on the heap?
-		   case gb_trees:lookup(Binp, D0) of
-		       {value,Bin} -> cdvbin(Offset,Sz,Bin);
-		       none -> '#CDVNonexistingBinary'
-		   end
-	   end,
-    D = gb_trees:insert(Addr, Term, D0),
-    {Term,Line,D}.
-
+    {Sz,Line3} = get_hex(Line2),
+    {Term,Line,D1} = deref_bin(Binp0, Offset, Sz, Line3, DecodeOpts, D0),
+    D = gb_trees:insert(Addr, Term, D1),
+    {Term,Line,D};
+parse_heap_term("Mf"++Line0, Addr, DecodeOpts, D0) -> %Flatmap.
+    {Size,":"++Line1} = get_hex(Line0),
+    {Keys,":"++Line2,D1} = parse_term(Line1, DecodeOpts, D0),
+    {Values,Line,D2} = parse_tuple(Size, Line2, Addr,DecodeOpts, D1, []),
+    Pairs = zip_tuples(tuple_size(Keys), Keys, Values, []),
+    Map = maps:from_list(Pairs),
+    D = gb_trees:update(Addr, Map, D2),
+    {Map,Line,D};
+parse_heap_term("Mh"++Line0, Addr, DecodeOpts, D0) -> %Head node in a hashmap.
+    {MapSize,":"++Line1} = get_hex(Line0),
+    {N,":"++Line2} = get_hex(Line1),
+    {Nodes,Line,D1} = parse_tuple(N, Line2, Addr, DecodeOpts, D0, []),
+    Map = maps:from_list(flatten_hashmap_nodes(Nodes)),
+    MapSize = maps:size(Map),                   %Assertion.
+    D = gb_trees:update(Addr, Map, D1),
+    {Map,Line,D};
+parse_heap_term("Mn"++Line0, Addr, DecodeOpts, D) -> %Interior node in a hashmap.
+    {N,":"++Line} = get_hex(Line0),
+    parse_tuple(N, Line, Addr, DecodeOpts, D, []).
 
 parse_tuple(0, Line, Addr, _, D0, Acc) ->
     Tuple = list_to_tuple(lists:reverse(Acc)),
     D = gb_trees:insert(Addr, Tuple, D0),
     {Tuple,Line,D};
-parse_tuple(N, Line0, Addr, BinAddrAdj, D0, Acc) ->
-    case parse_term(Line0, BinAddrAdj, D0) of
+parse_tuple(N, Line0, Addr, DecodeOpts, D0, Acc) ->
+    case parse_term(Line0, DecodeOpts, D0) of
 	{Term,[$,|Line],D} when N > 1 ->
-	    parse_tuple(N-1, Line, Addr, BinAddrAdj, D, [Term|Acc]);
+	    parse_tuple(N-1, Line, Addr, DecodeOpts, D, [Term|Acc]);
 	{Term,Line,D}->
-	    parse_tuple(N-1, Line, Addr, BinAddrAdj, D, [Term|Acc])
+	    parse_tuple(N-1, Line, Addr, DecodeOpts, D, [Term|Acc])
     end.
 
-parse_term([$H|Line0], BinAddrAdj, D) ->        %Pointer to heap term.
+zip_tuples(0, _T1, _T2, Acc) ->
+    Acc;
+zip_tuples(N, T1, T2, Acc) when N =< tuple_size(T1) ->
+    zip_tuples(N-1, T1, T2, [{element(N, T1),element(N, T2)}|Acc]).
+
+flatten_hashmap_nodes(Tuple) ->
+    flatten_hashmap_nodes_1(tuple_size(Tuple), Tuple, []).
+
+flatten_hashmap_nodes_1(0, _Tuple, Acc) ->
+    Acc;
+flatten_hashmap_nodes_1(N, Tuple0, Acc0) ->
+    case element(N, Tuple0) of
+        [K|V] ->
+            flatten_hashmap_nodes_1(N-1, Tuple0, [{K,V}|Acc0]);
+        Tuple when is_tuple(Tuple) ->
+            Acc = flatten_hashmap_nodes_1(N-1, Tuple0, Acc0),
+            flatten_hashmap_nodes_1(tuple_size(Tuple), Tuple, Acc)
+    end.
+
+parse_term([$H|Line0], DecodeOpts, D) ->        %Pointer to heap term.
     {Ptr,Line} = get_hex(Line0),
-    deref_ptr(Ptr, Line, BinAddrAdj, D);
+    deref_ptr(Ptr, Line, DecodeOpts, D);
 parse_term([$N|Line], _, D) ->			%[] (nil).
     {[],Line,D};
 parse_term([$I|Line0], _, D) ->			%Small.
@@ -2625,11 +2831,11 @@ parse_term([$p|Line0], _, D) ->			%Port.
 parse_term([$S|Str0], _, D) ->			%Information string.
     Str = lists:reverse(skip_blanks(lists:reverse(Str0))),
     {Str,[],D};
-parse_term([$D|Line0], _, D) ->                 %DistExternal
+parse_term([$D|Line0], DecodeOpts, D) ->                 %DistExternal
     try
 	{AttabSize,":"++Line1} = get_hex(Line0),
 	{Attab, "E"++Line2} = parse_atom_translation_table(AttabSize, Line1, []),
-	{Bin,Line3} = get_binary(Line2),
+	{Bin,Line3} = get_binary(Line2, DecodeOpts),
 	{try
 	     erts_debug:dist_ext_to_term(Attab, Bin)
 	 catch
@@ -2662,26 +2868,55 @@ parse_atom_translation_table(0, Line0, As) ->
 parse_atom_translation_table(N, Line0, As) ->
     {A, Line1, _} = parse_atom(Line0, []),
     parse_atom_translation_table(N-1, Line1, [A|As]).
-    
-    
 
-deref_ptr(Ptr, Line, BinAddrAdj, D0) ->
-    case gb_trees:lookup(Ptr, D0) of
+
+deref_ptr(Ptr, Line, DecodeOpts, D) ->
+    Lookup = fun(D0) ->
+                     gb_trees:lookup(Ptr, D0)
+             end,
+    do_deref_ptr(Lookup, Line, DecodeOpts, D).
+
+deref_bin(Binp0, Offset, Sz, Line, DecodeOpts, D) ->
+    Binp = Binp0 bor DecodeOpts#dec_opts.bin_addr_adj,
+    Lookup = fun(D0) ->
+                     lookup_binary(Binp, Offset, Sz, D0)
+             end,
+    do_deref_ptr(Lookup, Line, DecodeOpts, D).
+
+lookup_binary(Binp, Offset, Sz, D) ->
+    case lookup_binary_index(Binp) of
+        [{_,Start}] ->
+            Term = cdvbin(Offset, Sz, {'#CDVBin',Start}),
+            {value,Term};
+        [] ->
+            case gb_trees:lookup(Binp, D) of
+                {value,<<_:Offset/bytes,Sub:Sz/bytes,_/bytes>>} ->
+                    {value,Sub};
+                {value,SymbolicBin} ->
+                    {value,cdvbin(Offset, Sz, SymbolicBin)};
+                none ->
+                    none
+            end
+    end.
+
+do_deref_ptr(Lookup, Line, DecodeOpts, D0) ->
+    case Lookup(D0) of
 	{value,Term} ->
 	    {Term,Line,D0};
 	none ->
 	    case get(fd) of
 		end_of_heap ->
+                    put(incomplete_heap,true),
 		    {['#CDVIncompleteHeap'],Line,D0};
 		Fd ->
 		    case bytes(Fd) of
 			"="++_ ->
 			    put(fd, end_of_heap),
-			    deref_ptr(Ptr, Line, BinAddrAdj, D0);
+			    do_deref_ptr(Lookup, Line, DecodeOpts, D0);
 			L ->
                             update_progress(length(L)+1),
-			    D = parse(L, BinAddrAdj, D0),
-			    deref_ptr(Ptr, Line, BinAddrAdj, D)
+			    D = parse(L, DecodeOpts, D0),
+			    do_deref_ptr(Lookup, Line, DecodeOpts, D)
 		    end
 	    end
     end.
@@ -2744,36 +2979,80 @@ get_label([$:|Line], Acc) ->
 get_label([H|T], Acc) ->
     get_label(T, [H|Acc]).
 
-get_binary(Line0) ->
+get_binary(Line0,DecodeOpts) ->
     case get_hex(Line0) of
         {N,":"++Line} ->
-            do_get_binary(N, Line, [], false);
+            get_binary_1(N, Line, DecodeOpts);
         _  ->
            {'#CDVTruncatedBinary',[]}
     end.
 
-get_binary(Offset,Size,Line0) ->
+get_binary_1(N,Line,#dec_opts{base64=false}) ->
+    get_binary_hex(N, Line, [], false);
+get_binary_1(N,Line0,#dec_opts{base64=true}) ->
+    NumBytes = ((N+2) div 3) * 4,
+    {Base64,Line} = lists:split(NumBytes, Line0),
+    Bin = get_binary_base64(list_to_binary(Base64), <<>>, false),
+    {Bin,Line}.
+
+get_binary(Offset,Size,Line0,DecodeOpts) ->
     case get_hex(Line0) of
         {_N,":"++Line} ->
-            Progress = Size>?binary_size_progress_limit,
-            Progress andalso init_progress("Reading binary",Size),
-            do_get_binary(Size, lists:sublist(Line,(Offset*2)+1,Size*2), [],
-                          Progress);
-        _  ->
-           {'#CDVTruncatedBinary',[]}
-    end.
-
-do_get_binary(0, Line, Acc, Progress) ->
+            get_binary_1(Offset,Size,Line,DecodeOpts);
+        _ ->
+            {'#CDVTruncatedBinary',[]}
+    end.
+
+get_binary_1(Offset,Size,Line,#dec_opts{base64=false}) ->
+    Progress = Size > ?binary_size_progress_limit,
+    Progress andalso init_progress("Reading binary",Size),
+    get_binary_hex(Size, lists:sublist(Line,(Offset*2)+1,Size*2), [],
+                  Progress);
+get_binary_1(StartOffset,Size,Line,#dec_opts{base64=true}) ->
+    Progress = Size > ?binary_size_progress_limit,
+    Progress andalso init_progress("Reading binary",Size),
+    EndOffset = StartOffset + Size,
+    StartByte = (StartOffset div 3) * 4,
+    EndByte = ((EndOffset + 2) div 3) * 4,
+    NumBytes = EndByte - StartByte,
+    case list_to_binary(Line) of
+        <<_:StartByte/bytes,Base64:NumBytes/bytes,_/bytes>> ->
+            Bin0 = get_binary_base64(Base64, <<>>, Progress),
+            Skip = StartOffset - (StartOffset div 3) * 3,
+            <<_:Skip/bytes,Bin:Size/bytes,_/bytes>> = Bin0,
+            {Bin,[]};
+        _ ->
+            {'#CDVTruncatedBinary',[]}
+    end.
+
+get_binary_hex(0, Line, Acc, Progress) ->
     Progress andalso end_progress(),
     {list_to_binary(lists:reverse(Acc)),Line};
-do_get_binary(N, [A,B|Line], Acc, Progress) ->
+get_binary_hex(N, [A,B|Line], Acc, Progress) ->
     Byte = (get_hex_digit(A) bsl 4) bor get_hex_digit(B),
     Progress andalso update_progress(),
-    do_get_binary(N-1, Line, [Byte|Acc], Progress);
-do_get_binary(_N, [], _Acc, Progress) ->
+    get_binary_hex(N-1, Line, [Byte|Acc], Progress);
+get_binary_hex(_N, [], _Acc, Progress) ->
     Progress andalso end_progress(),
     {'#CDVTruncatedBinary',[]}.
 
+get_binary_base64(<<Chunk0:?base64_chunk_size/bytes,T/bytes>>,
+                  Acc0, Progress) ->
+    Chunk = base64:decode(Chunk0),
+    Acc = <<Acc0/binary,Chunk/binary>>,
+    Progress andalso update_progress(?base64_chunk_size * 3 div 4),
+    get_binary_base64(T, Acc, Progress);
+get_binary_base64(Chunk0, Acc, Progress) ->
+    case Progress of
+        true ->
+            update_progress(?base64_chunk_size * 3 div 4),
+            end_progress();
+        false ->
+            ok
+    end,
+    Chunk = base64:decode(Chunk0),
+    <<Acc/binary,Chunk/binary>>.
+
 cdvbin(Offset,Size,{'#CDVBin',Pos}) ->
     ['#CDVBin',Offset,Size,Pos];
 cdvbin(Offset,Size,['#CDVBin',_,_,Pos]) ->
@@ -2794,6 +3073,10 @@ reset_tables() ->
 insert_index(Tag,Id,Pos) ->
     ets:insert(cdv_dump_index_table,{{Tag,Pos},Id}).
 
+delete_index(Tag,Id) ->
+    Ms = [{{{Tag,'$1'},Id},[],[true]}],
+    ets:select_delete(cdv_dump_index_table, Ms).
+
 lookup_index({Tag,Id}) ->
     lookup_index(Tag,Id);
 lookup_index(Tag) ->
@@ -2810,6 +3093,7 @@ insert_binary_index(Addr,Pos) ->
 lookup_binary_index(Addr) ->
     ets:lookup(cdv_binary_index_table,Addr).
 
+
 %%-----------------------------------------------------------------
 %% Convert tags read from crashdump to atoms used as first part of key
 %% in cdv_dump_index_table
@@ -2818,6 +3102,10 @@ tag_to_atom("allocated_areas") -> ?allocated_areas;
 tag_to_atom("allocator") -> ?allocator;
 tag_to_atom("atoms") -> ?atoms;
 tag_to_atom("binary") -> ?binary;
+tag_to_atom("dirty_cpu_scheduler") -> ?dirty_cpu_scheduler;
+tag_to_atom("dirty_cpu_run_queue") -> ?dirty_cpu_run_queue;
+tag_to_atom("dirty_io_scheduler") -> ?dirty_io_scheduler;
+tag_to_atom("dirty_io_run_queue") -> ?dirty_io_run_queue;
 tag_to_atom("end") -> ?ende;
 tag_to_atom("erl_crash_dump") -> ?erl_crash_dump;
 tag_to_atom("ets") -> ?ets;
@@ -2827,6 +3115,7 @@ tag_to_atom("hidden_node") -> ?hidden_node;
 tag_to_atom("index_table") -> ?index_table;
 tag_to_atom("instr_data") -> ?instr_data;
 tag_to_atom("internal_ets") -> ?internal_ets;
+tag_to_atom("literals") -> ?literals;
 tag_to_atom("loaded_modules") -> ?loaded_modules;
 tag_to_atom("memory") -> ?memory;
 tag_to_atom("mod") -> ?mod;
@@ -2850,8 +3139,10 @@ tag_to_atom(UnknownTag) ->
 %%%-----------------------------------------------------------------
 %%% Store last tag for use when truncated, and reason if aborted
 put_last_tag(?abort,Reason) ->
-    %% Don't overwrite the real last tag
-    put(truncated_reason,Reason);
+    %% Don't overwrite the real last tag, and make sure to return
+    %% the previous last tag.
+    put(truncated_reason,Reason),
+    get(last_tag);
 put_last_tag(Tag,Id) ->
     put(last_tag,{Tag,Id}).
 
diff --git a/lib/observer/src/crashdump_viewer.hrl b/lib/observer/src/crashdump_viewer.hrl
index 6a93a089fd..252e19379d 100644
--- a/lib/observer/src/crashdump_viewer.hrl
+++ b/lib/observer/src/crashdump_viewer.hrl
@@ -80,6 +80,10 @@
 	 old_heap,
 	 heap_unused,
 	 old_heap_unused,
+         bin_vheap,
+         old_bin_vheap,
+         bin_vheap_unused,
+         old_bin_vheap_unused,
 	 new_heap_start,
 	 new_heap_top,
 	 stack_top,
@@ -95,19 +99,27 @@
 
 -record(port,
 	{id,
+         state,
+         task_flags=0,
 	 slot,
 	 connected,
 	 links,
 	 name,
 	 monitors,
-	 controls}).
+         suspended,
+	 controls,
+         input,
+         output,
+         queue,
+         port_data}).
 
 -record(sched,
 	{name,
+         type,
 	 process,
 	 port,
 	 run_q=0,
-	 port_q=0,
+	 port_q,
 	 details=#{}
 	}).
 
diff --git a/lib/observer/src/observer.app.src b/lib/observer/src/observer.app.src
index f682e3dc7b..cd4aa2e299 100644
--- a/lib/observer/src/observer.app.src
+++ b/lib/observer/src/observer.app.src
@@ -65,8 +65,7 @@
     {registered, []},
     {applications, [kernel, stdlib]},
     {env, []},
-    {runtime_dependencies, ["wx-1.2","stdlib-3.4","runtime_tools-1.8.14",
-			    "kernel-3.0","inets-5.10","et-1.5",
-			    "erts-7.0"]}]}.
+    {runtime_dependencies, ["wx-1.2","stdlib-3.5","runtime_tools-1.8.14",
+			    "kernel-3.0","et-1.5","erts-7.0"]}]}.
 
 
diff --git a/lib/observer/src/observer_alloc_wx.erl b/lib/observer/src/observer_alloc_wx.erl
index 7f4b3dd484..e0f319b6cc 100644
--- a/lib/observer/src/observer_alloc_wx.erl
+++ b/lib/observer/src/observer_alloc_wx.erl
@@ -79,8 +79,8 @@ init([Notebook, Parent, Config]) ->
                       max   = #{}
 		     }
 	}
-    catch _:Err ->
-	    io:format("~p crashed ~tp: ~tp~n",[?MODULE, Err, erlang:get_stacktrace()]),
+    catch _:Err:Stacktrace ->
+	    io:format("~p crashed ~tp: ~tp~n",[?MODULE, Err, Stacktrace]),
 	    {stop, Err}
     end.
 
diff --git a/lib/observer/src/observer_html_lib.erl b/lib/observer/src/observer_html_lib.erl
index 68381bcc7b..8202f91030 100644
--- a/lib/observer/src/observer_html_lib.erl
+++ b/lib/observer/src/observer_html_lib.erl
@@ -355,11 +355,11 @@ href_proc_bin(From, T, Acc, LTB) ->
                                 PreviewStr
                         end
                 end;
-	    [PreviewIntStr,SizeStr,Md5] when From =:= obs ->
+	    [PreviewIntStr,PreviewBitSizeStr,SizeStr,Md5] when From =:= obs ->
 		Size = list_to_integer(SizeStr),
                 PreviewInt = list_to_integer(PreviewIntStr),
-		PrevSize = (trunc(math:log2(PreviewInt)/8)+1)*8,
-		PreviewStr = preview_string(Size,<<PreviewInt:PrevSize>>),
+                PreviewBitSize = list_to_integer(PreviewBitSizeStr),
+		PreviewStr = preview_string(Size,<<PreviewInt:PreviewBitSize>>),
 		if LTB ->
 			href("TARGET=\"expanded\"",
 			     ["#OBSBinary?key1="++PreviewIntStr++
diff --git a/lib/observer/src/observer_lib.erl b/lib/observer/src/observer_lib.erl
index e5ffe61d25..0678b64134 100644
--- a/lib/observer/src/observer_lib.erl
+++ b/lib/observer/src/observer_lib.erl
@@ -21,7 +21,8 @@
 
 -export([get_wx_parent/1,
 	 display_info_dialog/2, display_yes_no_dialog/1,
-	 display_progress_dialog/3, destroy_progress_dialog/0,
+	 display_progress_dialog/3,
+         destroy_progress_dialog/0, sync_destroy_progress_dialog/0,
 	 wait_for_progress/0, report_progress/1,
 	 user_term/3, user_term_multiline/3,
 	 interval_dialog/4, start_timer/1, start_timer/2, stop_timer/1, timer_config/1,
@@ -31,7 +32,8 @@
 	 set_listctrl_col_size/2,
 	 create_status_bar/1,
 	 html_window/1, html_window/2,
-         make_obsbin/2
+         make_obsbin/2,
+         add_scroll_entries/2
 	]).
 
 -include_lib("wx/include/wx.hrl").
@@ -40,6 +42,8 @@
 -define(SINGLE_LINE_STYLE, ?wxBORDER_NONE bor ?wxTE_READONLY bor ?wxTE_RICH2).
 -define(MULTI_LINE_STYLE, ?SINGLE_LINE_STYLE bor ?wxTE_MULTILINE).
 
+-define(NUM_SCROLL_ITEMS,8).
+
 -define(pulse_timeout,50).
 
 get_wx_parent(Window) ->
@@ -397,17 +401,18 @@ get_box_info({Title, left, List}) -> {Title, ?wxALIGN_LEFT, List};
 get_box_info({Title, right, List}) -> {Title, ?wxALIGN_RIGHT, List}.
 
 add_box(Panel, OuterBox, Cursor, Title, Proportion, {Format, List}) ->
-    Box = wxStaticBoxSizer:new(?wxVERTICAL, Panel, [{label, Title}]),
+    NumStr = " ("++integer_to_list(length(List))++")",
+    Box = wxStaticBoxSizer:new(?wxVERTICAL, Panel, [{label, Title ++ NumStr}]),
     Scroll = wxScrolledWindow:new(Panel),
     wxScrolledWindow:enableScrolling(Scroll,true,true),
     wxScrolledWindow:setScrollbars(Scroll,1,1,0,0),
     ScrollSizer  = wxBoxSizer:new(?wxVERTICAL),
     wxScrolledWindow:setSizer(Scroll, ScrollSizer),
     wxWindow:setBackgroundStyle(Scroll, ?wxBG_STYLE_SYSTEM),
-    add_entries(Format, List, Scroll, ScrollSizer, Cursor),
+    Entries = add_entries(Format, List, Scroll, ScrollSizer, Cursor),
     wxSizer:add(Box,Scroll,[{proportion,1},{flag,?wxEXPAND}]),
     wxSizer:add(OuterBox,Box,[{proportion,Proportion},{flag,?wxEXPAND}]),
-    {Scroll,ScrollSizer,length(List)}.
+    {Scroll,ScrollSizer,length(Entries)}.
 
 add_entries(click, List, Scroll, ScrollSizer, Cursor) ->
     Add = fun(Link) ->
@@ -415,7 +420,20 @@ add_entries(click, List, Scroll, ScrollSizer, Cursor) ->
                   wxWindow:setBackgroundStyle(TC, ?wxBG_STYLE_SYSTEM),
 		  wxSizer:add(ScrollSizer,TC, [{flag,?wxEXPAND}])
 	  end,
-    [Add(Link) || Link <- List];
+    if length(List) > ?NUM_SCROLL_ITEMS ->
+            {List1,Rest} = lists:split(?NUM_SCROLL_ITEMS,List),
+            LinkEntries = [Add(Link) || Link <- List1],
+            NStr = integer_to_list(length(Rest)),
+            TC = link_entry2(Scroll,
+                             {{more,{Rest,Scroll,ScrollSizer}},"more..."},
+                             Cursor,
+                             "Click to see " ++ NStr ++ " more entries"),
+            wxWindow:setBackgroundStyle(TC, ?wxBG_STYLE_SYSTEM),
+            E = wxSizer:add(ScrollSizer,TC, [{flag,?wxEXPAND}]),
+            LinkEntries ++ [E];
+       true ->
+            [Add(Link) || Link <- List]
+    end;
 add_entries(plain, List, Scroll, ScrollSizer, _) ->
     Add = fun(String) ->
 		  TC = wxStaticText:new(Scroll, ?wxID_ANY, String),
@@ -423,6 +441,23 @@ add_entries(plain, List, Scroll, ScrollSizer, _) ->
 	  end,
     [Add(String) || String <- List].
 
+add_scroll_entries(MoreEntry,{List, Scroll, ScrollSizer}) ->
+    wx:batch(
+      fun() ->
+              wxSizer:remove(ScrollSizer,?NUM_SCROLL_ITEMS),
+              wxStaticText:destroy(MoreEntry),
+              Cursor = wxCursor:new(?wxCURSOR_HAND),
+              Add = fun(Link) ->
+                            TC = link_entry(Scroll, Link, Cursor),
+                            wxWindow:setBackgroundStyle(TC, ?wxBG_STYLE_SYSTEM),
+                            wxSizer:add(ScrollSizer,TC, [{flag,?wxEXPAND}])
+                    end,
+              Entries = [Add(Link) || Link <- List],
+              wxCursor:destroy(Cursor),
+              wxSizer:layout(ScrollSizer),
+              wxSizer:setVirtualSizeHints(ScrollSizer,Scroll),
+              Entries
+      end).
 
 create_box(_Panel, {scroll_boxes,[]}) ->
     undefined;
@@ -449,7 +484,7 @@ create_box(Panel, {scroll_boxes,Data}) ->
     {_,H} = wxWindow:getSize(Dummy),
     wxTextCtrl:destroy(Dummy),
 
-    MaxH = if MaxL > 8 -> 8*H;
+    MaxH = if MaxL > ?NUM_SCROLL_ITEMS -> ?NUM_SCROLL_ITEMS*H;
 	      true -> MaxL*H
 	   end,
     [wxWindow:setMinSize(B,{0,MaxH}) || {B,_,_} <- Boxes],
@@ -504,20 +539,22 @@ create_box(Parent, Data) ->
 
 link_entry(Panel, Link) ->
     Cursor = wxCursor:new(?wxCURSOR_HAND),
-    TC = link_entry2(Panel, to_link(Link), Cursor),
+    TC = link_entry(Panel, Link, Cursor),
     wxCursor:destroy(Cursor),
     TC.
 link_entry(Panel, Link, Cursor) ->
-    link_entry2(Panel, to_link(Link), Cursor).
+    link_entry2(Panel,to_link(Link),Cursor).
 
 link_entry2(Panel,{Target,Str},Cursor) ->
+    link_entry2(Panel,{Target,Str},Cursor,"Click to see properties for " ++ Str).
+link_entry2(Panel,{Target,Str},Cursor,ToolTipText) ->
     TC = wxStaticText:new(Panel, ?wxID_ANY, Str),
     wxWindow:setForegroundColour(TC,?wxBLUE),
     wxWindow:setCursor(TC, Cursor),
     wxWindow:connect(TC, left_down, [{userData,Target}]),
     wxWindow:connect(TC, enter_window),
     wxWindow:connect(TC, leave_window),
-    ToolTip = wxToolTip:new("Click to see properties for " ++ Str),
+    ToolTip = wxToolTip:new(ToolTipText),
     wxWindow:setToolTip(TC, ToolTip),
     TC.
 
@@ -708,6 +745,11 @@ wait_for_progress() ->
 destroy_progress_dialog() ->
     report_progress(finish).
 
+sync_destroy_progress_dialog() ->
+    Ref = erlang:monitor(process,?progress_handler),
+    destroy_progress_dialog(),
+    receive {'DOWN',Ref,process,_,_} -> ok end.
+
 report_progress(Progress) ->
     case whereis(?progress_handler) of
 	Pid when is_pid(Pid) ->
@@ -787,9 +829,8 @@ progress_dialog_new(Parent,Title,Str) ->
                           [{style,?wxDEFAULT_DIALOG_STYLE}]),
     Panel = wxPanel:new(Dialog),
     Sizer = wxBoxSizer:new(?wxVERTICAL),
-    Message = wxStaticText:new(Panel, 1, Str),
-    Gauge = wxGauge:new(Panel, 2, 100, [{size, {170, -1}},
-                                        {style, ?wxGA_HORIZONTAL}]),
+    Message = wxStaticText:new(Panel, 1, Str,[{size,{220,-1}}]),
+    Gauge = wxGauge:new(Panel, 2, 100, [{style, ?wxGA_HORIZONTAL}]),
     SizerFlags = ?wxEXPAND bor ?wxLEFT bor ?wxRIGHT bor ?wxTOP,
     wxSizer:add(Sizer, Message, [{flag,SizerFlags},{border,15}]),
     wxSizer:add(Sizer, Gauge, [{flag, SizerFlags bor ?wxBOTTOM},{border,15}]),
@@ -810,7 +851,7 @@ progress_dialog_destroy({Dialog,_,_}) ->
 
 make_obsbin(Bin,Tab) ->
     Size = byte_size(Bin),
-    Preview =
+    {Preview,PreviewBitSize} =
         try
             %% The binary might be a unicode string, in which case we
             %% don't want to split it in the middle of a grapheme
@@ -819,14 +860,14 @@ make_obsbin(Bin,Tab) ->
             PB1 = string:slice(Bin,0,PL1),
             PS1 = byte_size(PB1) * 8,
             <<P1:PS1>> = PB1,
-            P1
+            {P1,PS1}
         catch _:_ ->
                 %% Probably not a string, so just split anywhere
                 PS2 = min(Size, 10) * 8,
                 <<P2:PS2, _/binary>> = Bin,
-                P2
+                {P2,PS2}
         end,
     Hash = erlang:phash2(Bin),
     Key = {Preview, Size, Hash},
     ets:insert(Tab, {Key,Bin}),
-    ['#OBSBin',Preview,Size,Hash].
+    ['#OBSBin',Preview,PreviewBitSize,Size,Hash].
diff --git a/lib/observer/src/observer_perf_wx.erl b/lib/observer/src/observer_perf_wx.erl
index 5adfadb16e..eddb9327f3 100644
--- a/lib/observer/src/observer_perf_wx.erl
+++ b/lib/observer/src/observer_perf_wx.erl
@@ -86,8 +86,8 @@ init([Notebook, Parent, Config]) ->
                                  secs=maps:get(secs, Config, ?DISP_SECONDS)}
 		       },
 	{Panel, State0}
-    catch _:Err ->
-	    io:format("~p crashed ~tp: ~tp~n",[?MODULE, Err, erlang:get_stacktrace()]),
+    catch _:Err:Stacktrace ->
+	    io:format("~p crashed ~tp: ~tp~n",[?MODULE, Err, Stacktrace]),
 	    {stop, Err}
     end.
 
diff --git a/lib/observer/src/observer_port_wx.erl b/lib/observer/src/observer_port_wx.erl
index 5908e99e36..f7ae07fb85 100644
--- a/lib/observer/src/observer_port_wx.erl
+++ b/lib/observer/src/observer_port_wx.erl
@@ -242,6 +242,10 @@ handle_event(#wx{id=?ID_REFRESH_INTERVAL},
     Timer = observer_lib:interval_dialog(Grid, Timer0, 10, 5*60),
     {noreply, State#state{timer=Timer}};
 
+handle_event(#wx{obj=MoreEntry,event=#wxMouse{type=left_down},userData={more,More}}, State) ->
+    observer_lib:add_scroll_entries(MoreEntry,More),
+    {noreply, State};
+
 handle_event(#wx{event=#wxMouse{type=left_down}, userData=TargetPid}, State) ->
     observer ! {open_link, TargetPid},
     {noreply, State};
diff --git a/lib/observer/src/observer_pro_wx.erl b/lib/observer/src/observer_pro_wx.erl
index 2e5fe0bc1a..1c40afba46 100644
--- a/lib/observer/src/observer_pro_wx.erl
+++ b/lib/observer/src/observer_pro_wx.erl
@@ -27,7 +27,7 @@
 	 handle_event/2, handle_cast/2]).
 
 -include_lib("wx/include/wx.hrl").
--include("../include/etop.hrl").
+-include("etop.hrl").
 -include("observer_defs.hrl").
 -include("etop_defs.hrl").
 
@@ -572,7 +572,8 @@ change_accum(true, S0) ->
     S0#holder{accum=true};
 change_accum(false, S0=#holder{info=Info}) ->
     self() ! refresh,
-    S0#holder{accum=lists:sort(array:to_list(Info))}.
+    Accum = [{Pid, Reds} || #etop_proc_info{pid=Pid, reds=Reds} <- array:to_list(Info)],
+    S0#holder{accum=lists:sort(Accum)}.
 
 handle_update_old(#etop_info{procinfo=ProcInfo0},
                   S0=#holder{parent=Parent, sort=Sort=#sort{sort_key=KeyField}}) ->
diff --git a/lib/observer/src/observer_procinfo.erl b/lib/observer/src/observer_procinfo.erl
index 4ce38e439d..6a85d29c1e 100644
--- a/lib/observer/src/observer_procinfo.erl
+++ b/lib/observer/src/observer_procinfo.erl
@@ -120,6 +120,10 @@ handle_event(#wx{id=?REFRESH}, #state{frame=Frame, pid=Pid, pages=Pages, expand_
     end,
     {noreply, State};
 
+handle_event(#wx{obj=MoreEntry,event=#wxMouse{type=left_down},userData={more,More}}, State) ->
+    observer_lib:add_scroll_entries(MoreEntry,More),
+    {noreply, State};
+
 handle_event(#wx{event=#wxMouse{type=left_down}, userData=TargetPid}, State) ->
     observer ! {open_link, TargetPid},
     {noreply, State};
@@ -144,7 +148,7 @@ handle_event(#wx{event=#wxHtmlLink{linkInfo=#wxHtmlLinkInfo{href=Href}}},
 	    observer ! {open_link, Href},
 	    {noreply, State};
 	Callback ->
-	    [{"key1",Key1},{"key2",Key2},{"key3",Key3}] = httpd:parse_query(Rest),
+	    [{"key1",Key1},{"key2",Key2},{"key3",Key3}] = uri_string:dissect_query(Rest),
 	    Id = {obs, {T,{list_to_integer(Key1),
 			   list_to_integer(Key2),
 			   list_to_integer(Key3)}}},
@@ -253,8 +257,6 @@ init_stack_page(Parent, Pid) ->
 					      [Pid, current_stacktrace])
 		     of
 			 {current_stacktrace,RawBt} ->
-			     observer_wx:try_rpc(node(Pid), erlang, process_info,
-						 [Pid, current_stacktrace]),
 			     wxListCtrl:deleteAllItems(LCtrl),
 			     wx:foldl(fun({M, F, A, Info}, Row) ->
 					      _Item = wxListCtrl:insertItem(LCtrl, Row, ""),
diff --git a/lib/observer/src/observer_trace_wx.erl b/lib/observer/src/observer_trace_wx.erl
index 8127248262..2c3b46a3a1 100644
--- a/lib/observer/src/observer_trace_wx.erl
+++ b/lib/observer/src/observer_trace_wx.erl
@@ -1201,7 +1201,7 @@ make_ms(MS) ->
     make_ms(Name,Term,FunStr).
 
 make_ms(Name, Term, FunStr) ->
-    #match_spec{name=Name, term=Term, str=io_lib:format("~tw", Term), func = FunStr}.
+    #match_spec{name=Name, term=Term, str=io_lib:format("~tw", [Term]), func = FunStr}.
 
 parse_tp({tp, Mod, FAs}, State) ->
     Patterns = [#tpattern{m=Mod,fa={F,A}, ms=make_ms(List)} ||
diff --git a/lib/observer/src/observer_traceoptions_wx.erl b/lib/observer/src/observer_traceoptions_wx.erl
index fbcf6d7fe9..ff8c40ce77 100644
--- a/lib/observer/src/observer_traceoptions_wx.erl
+++ b/lib/observer/src/observer_traceoptions_wx.erl
@@ -536,7 +536,7 @@ ms_from_string(Str) ->
 	    {error, List} -> throw([[Error, $\n] || {_, Error} <- List])
 	end
     catch error:_Reason ->
-	    %% io:format("Bad term: ~ts~n ~tp in ~tp~n", [Str, _Reason, erlang:get_stacktrace()]),
+	    %% io:format("Bad term: ~ts~n ~tp in ~tp~n", [Str, _Reason, Stacktrace]),
 	    throw("Invalid term")
     end.
 
diff --git a/lib/observer/src/observer_tv_wx.erl b/lib/observer/src/observer_tv_wx.erl
index e16f3cab6b..2e387f7e74 100644
--- a/lib/observer/src/observer_tv_wx.erl
+++ b/lib/observer/src/observer_tv_wx.erl
@@ -38,13 +38,13 @@
 -define(ID_SYSTEM_TABLES, 406).
 -define(ID_TABLE_INFO, 407).
 -define(ID_SHOW_TABLE, 408).
- 
--record(opt, {type=ets,
-	      sys_hidden=true,
-	      unread_hidden=true,
-	      sort_key=2,
-	      sort_incr=true
-	     }).
+
+-record(opts, {type=ets,
+               sys_hidden=true,
+               unread_hidden=true}).
+
+-record(sort, {sort_incr=true,
+               sort_key=2}).
 
 -record(state,
 	{
@@ -52,9 +52,9 @@
 	  grid,
 	  panel,
 	  node=node(),
-	  opt=#opt{},
+	  opts=#opts{},
+          holder,
 	  selected,
-	  tabs,
 	  timer
 	}).
 
@@ -64,8 +64,18 @@ start_link(Notebook,  Parent, Config) ->
 init([Notebook, Parent, Config]) ->
     Panel = wxPanel:new(Notebook),
     Sizer = wxBoxSizer:new(?wxVERTICAL),
-    Style = ?wxLC_REPORT bor ?wxLC_SINGLE_SEL bor ?wxLC_HRULES,
-    Grid = wxListCtrl:new(Panel, [{winid, ?GRID}, {style, Style}]),
+
+    Opts=#opts{type=maps:get(type, Config, ets),
+               sys_hidden=maps:get(sys_hidden, Config, true),
+               unread_hidden=maps:get(unread_hidden, Config, true)},
+
+    Style = ?wxLC_REPORT bor ?wxLC_VIRTUAL bor ?wxLC_SINGLE_SEL bor ?wxLC_HRULES,
+    Self = self(),
+    Attrs = observer_lib:create_attrs(),
+    Holder = spawn_link(fun() -> init_table_holder(Self, Attrs) end),
+    CBs = [{onGetItemText, fun(_, Item,Col) -> get_row(Holder, Item, Col) end},
+           {onGetItemAttr, fun(_, Item) -> get_attr(Holder, Item) end}],
+    Grid = wxListCtrl:new(Panel, [{winid, ?GRID}, {style, Style} | CBs]),
     wxSizer:add(Sizer, Grid, [{flag, ?wxEXPAND bor ?wxALL},
 			      {proportion, 1}, {border, 5}]),
     wxWindow:setSizer(Panel, Sizer),
@@ -95,38 +105,26 @@ init([Notebook, Parent, Config]) ->
 
     wxWindow:setFocus(Grid),
     {Panel, #state{grid=Grid, parent=Parent, panel=Panel,
-                   timer=Config,
-                   opt=#opt{type=maps:get(type, Config, ets),
-                            sys_hidden=maps:get(sys_hidden, Config, true),
-                            unread_hidden=maps:get(unread_hidden, Config, true)}
-                  }}.
+                   opts=Opts, timer=Config, holder=Holder}}.
 
 handle_event(#wx{id=?ID_REFRESH},
-	     State = #state{node=Node, grid=Grid, opt=Opt}) ->
-    Tables = get_tables(Node, Opt),
-    {Tabs,Sel} = update_grid(Grid, sel(State), Opt, Tables),
-    Sel =/= undefined andalso wxListCtrl:ensureVisible(Grid, Sel),
-    {noreply, State#state{tabs=Tabs, selected=Sel}};
+	     State = #state{holder=Holder, node=Node, opts=Opts}) ->
+    Tables = get_tables(Node, Opts),
+    Holder ! {refresh, Tables},
+    {noreply, State};
 
 handle_event(#wx{event=#wxList{type=command_list_col_click, col=Col}},
-	     State = #state{node=Node, grid=Grid,
-			    opt=Opt0=#opt{sort_key=Key, sort_incr=Bool}}) ->
-    Opt = case col2key(Col) of
-	      Key -> Opt0#opt{sort_incr=not Bool};
-	      NewKey -> Opt0#opt{sort_key=NewKey}
-	  end,
-    Tables = get_tables(Node, Opt),
-    {Tabs,Sel} = update_grid(Grid, sel(State), Opt, Tables),
-    wxWindow:setFocus(Grid),
-    {noreply, State#state{opt=Opt, tabs=Tabs, selected=Sel}};
+	     State = #state{holder=Holder}) ->
+    Holder ! {sort, Col},
+    {noreply, State};
 
-handle_event(#wx{id=Id}, State = #state{node=Node, grid=Grid, opt=Opt0})
+handle_event(#wx{id=Id}, State = #state{node=Node, holder=Holder, grid=Grid, opts=Opt0})
   when Id >= ?ID_ETS, Id =< ?ID_SYSTEM_TABLES ->
     Opt = case Id of
-	      ?ID_ETS -> Opt0#opt{type=ets};
-	      ?ID_MNESIA -> Opt0#opt{type=mnesia};
-	      ?ID_UNREADABLE -> Opt0#opt{unread_hidden= not Opt0#opt.unread_hidden};
-	      ?ID_SYSTEM_TABLES -> Opt0#opt{sys_hidden= not Opt0#opt.sys_hidden}
+	      ?ID_ETS -> Opt0#opts{type=ets};
+	      ?ID_MNESIA -> Opt0#opts{type=mnesia};
+	      ?ID_UNREADABLE -> Opt0#opts{unread_hidden= not Opt0#opts.unread_hidden};
+	      ?ID_SYSTEM_TABLES -> Opt0#opts{sys_hidden= not Opt0#opts.sys_hidden}
 	  end,
     case get_tables2(Node, Opt) of
 	Error = {error, _} ->
@@ -135,9 +133,9 @@ handle_event(#wx{id=Id}, State = #state{node=Node, grid=Grid, opt=Opt0})
 	    self() ! Error,
 	    {noreply, State};
 	Tables ->
-	    {Tabs, Sel} = update_grid(Grid, sel(State), Opt, Tables),
+	    Holder ! {refresh, Tables},
 	    wxWindow:setFocus(Grid),
-	    {noreply, State#state{opt=Opt, tabs=Tabs, selected=Sel}}
+	    {noreply, State#state{opts=Opt}}
     end;
 
 handle_event(#wx{event=#wxSize{size={W,_}}},  State=#state{grid=Grid}) ->
@@ -146,19 +144,18 @@ handle_event(#wx{event=#wxSize{size={W,_}}},  State=#state{grid=Grid}) ->
 
 handle_event(#wx{event=#wxList{type=command_list_item_activated,
 			       itemIndex=Index}},
-	     State=#state{grid=Grid, node=Node, opt=#opt{type=Type}, tabs=Tabs}) ->
-    Table = lists:nth(Index+1, Tabs),
-    case Table#tab.protection of
-	private ->
-	    self() ! {error, "Table has 'private' protection and can not be read"};
-	_ ->
-	    observer_tv_table:start_link(Grid, [{node,Node}, {type,Type}, {table,Table}])
+	     State=#state{holder=Holder, node=Node, opts=#opts{type=Type}, grid=Grid}) ->
+    case get_table(Holder, Index) of
+        #tab{protection=private} ->
+            self() ! {error, "Table has 'private' protection and can not be read"};
+        #tab{}=Table ->
+	    observer_tv_table:start_link(Grid, [{node,Node}, {type,Type}, {table,Table}]);
+        _ -> ignore
     end,
     {noreply, State};
 
 handle_event(#wx{event=#wxList{type=command_list_item_right_click}},
 	     State=#state{panel=Panel}) ->
-
     Menu = wxMenu:new(),
     wxMenu:append(Menu, ?ID_TABLE_INFO, "Table info"),
     wxMenu:append(Menu, ?ID_SHOW_TABLE, "Show Table Content"),
@@ -167,32 +164,33 @@ handle_event(#wx{event=#wxList{type=command_list_item_right_click}},
     {noreply, State};
 
 handle_event(#wx{event=#wxList{type=command_list_item_selected, itemIndex=Index}},
-	     State) ->
+	     State=#state{holder=Holder}) ->
+    Holder ! {selected, Index},
     {noreply, State#state{selected=Index}};
 
 handle_event(#wx{id=?ID_TABLE_INFO},
-	     State = #state{grid=Grid, node=Node, opt=#opt{type=Type}, tabs=Tabs, selected=Sel}) ->
+	     State = #state{holder=Holder, grid=Grid, node=Node, opts=#opts{type=Type}, selected=Sel}) ->
     case Sel of
 	undefined ->
 	    {noreply, State};
 	R when is_integer(R) ->
-	    Table = lists:nth(Sel+1, Tabs),
+	    Table = get_table(Holder, Sel),
 	    display_table_info(Grid, Node, Type, Table),
 	    {noreply, State}
     end;
 
 handle_event(#wx{id=?ID_SHOW_TABLE},
-	     State=#state{grid=Grid, node=Node, opt=#opt{type=Type}, tabs=Tabs, selected=Sel}) ->
+	     State=#state{holder=Holder, grid=Grid, node=Node, opts=#opts{type=Type}, selected=Sel}) ->
     case Sel of
 	undefined ->
 	    {noreply, State};
 	R when is_integer(R) ->
-	    Table = lists:nth(Sel+1, Tabs),
-	    case Table#tab.protection of
-		private ->
+	    case get_table(Holder, R) of
+		#tab{protection=private} ->
 		    self() ! {error, "Table has 'private' protection and can not be read"};
-		_ ->
-		    observer_tv_table:start_link(Grid, [{node,Node}, {type,Type}, {table,Table}])
+                #tab{}=Table ->
+		    observer_tv_table:start_link(Grid, [{node,Node}, {type,Type}, {table,Table}]);
+                _ -> ignore
 	    end,
 	    {noreply, State}
     end;
@@ -202,14 +200,14 @@ handle_event(#wx{id=?ID_REFRESH_INTERVAL},
     Timer = observer_lib:interval_dialog(Grid, Timer0, 10, 5*60),
     {noreply, State#state{timer=Timer}};
 
-handle_event(Event, _State) ->
-    error({unhandled_event, Event}).
+handle_event(_Event, State) ->
+    {noreply, State}.
 
 handle_sync_event(_Event, _Obj, _State) ->
     ok.
 
-handle_call(get_config, _, #state{timer=Timer, opt=Opt}=State) ->
-    #opt{type=Type, sys_hidden=Sys, unread_hidden=Unread} = Opt,
+handle_call(get_config, _, #state{timer=Timer, opts=Opt}=State) ->
+    #opts{type=Type, sys_hidden=Sys, unread_hidden=Unread} = Opt,
     Conf0 = observer_lib:timer_config(Timer),
     Conf = Conf0#{type=>Type, sys_hidden=>Sys, unread_hidden=>Unread},
     {reply, Conf, State};
@@ -220,50 +218,68 @@ handle_call(Event, From, _State) ->
 handle_cast(Event, _State) ->
     error({unhandled_cast, Event}).
 
-handle_info(refresh_interval, State = #state{node=Node, grid=Grid, opt=Opt,
-                                             tabs=OldTabs}) ->
-    case get_tables(Node, Opt) of
-        OldTabs ->
-            %% no change
-            {noreply, State};
-        Tables ->
-            {Tabs, Sel} = update_grid(Grid, sel(State), Opt, Tables),
-            Sel =/= undefined andalso wxListCtrl:ensureVisible(Grid, Sel),
-            {noreply, State#state{tabs=Tabs, selected=Sel}}
-    end;
+handle_info(refresh_interval, State = #state{holder=Holder, node=Node, opts=Opt}) ->
+    Tables = get_tables(Node, Opt),
+    Holder ! {refresh, Tables},
+    {noreply, State};
 
-handle_info({active, Node}, State = #state{parent=Parent, grid=Grid, opt=Opt0,
-					   timer=Timer0}) ->
-    {Tables, Opt} = case Opt0#opt.type =:= mnesia andalso get_tables2(Node, Opt0) of
+handle_info({active, Node}, State = #state{parent=Parent, holder=Holder, grid=Grid,
+                                           opts=Opt0, timer=Timer0}) ->
+    {Tables, Opt} = case Opt0#opts.type =:= mnesia andalso get_tables2(Node, Opt0) of
                         Ts when is_list(Ts) ->
                             {Ts, Opt0};
                         _ -> % false or error getting mnesia tables
-                            Opt1 = Opt0#opt{type=ets},
+                            Opt1 = Opt0#opts{type=ets},
                             {get_tables(Node, Opt1), Opt1}
                     end,
-    {Tabs,Sel} = update_grid(Grid, sel(State), Opt, Tables),
+    Holder ! {refresh, Tables},
     wxWindow:setFocus(Grid),
     create_menus(Parent, Opt),
     Timer = observer_lib:start_timer(Timer0, 10),
-    {noreply, State#state{node=Node, tabs=Tabs, timer=Timer, opt=Opt, selected=Sel}};
+    {noreply, State#state{node=Node, timer=Timer, opts=Opt}};
 
 handle_info(not_active, State = #state{timer = Timer0}) ->
     Timer = observer_lib:stop_timer(Timer0),
     {noreply, State#state{timer=Timer}};
 
-handle_info({error, Error}, #state{panel=Panel,opt=Opt}=State) ->
+handle_info({error, Error}, #state{panel=Panel,opts=Opt}=State) ->
     Str = io_lib:format("ERROR: ~ts~n",[Error]),
     observer_lib:display_info_dialog(Panel,Str),
-    case Opt#opt.type of
+    case Opt#opts.type of
         mnesia -> wxMenuBar:check(observer_wx:get_menubar(), ?ID_ETS, true);
         _ -> ok
     end,
-    {noreply, State#state{opt=Opt#opt{type=ets}}};
+    {noreply, State#state{opts=Opt#opts{type=ets}}};
+
+handle_info({refresh, Min, Min}, State = #state{grid=Grid}) ->
+    wxListCtrl:setItemCount(Grid, Min+1),
+    wxListCtrl:refreshItem(Grid, Min), %% Avoid assert in wx below if Max is 0
+    observer_wx:set_status(io_lib:format("Tables: ~w", [Min+1])),
+    {noreply, State};
+handle_info({refresh, Min, Max}, State = #state{grid=Grid}) ->
+    wxListCtrl:setItemCount(Grid, Max+1),
+    Max > 0 andalso wxListCtrl:refreshItems(Grid, Min, Max),
+    observer_wx:set_status(io_lib:format("Tables: ~w", [Max+1])),
+    {noreply, State};
+
+handle_info({selected, New, Size}, #state{grid=Grid, selected=Old} = State) ->
+    if
+        is_integer(Old), Old < Size ->
+            wxListCtrl:setItemState(Grid, Old, 0, ?wxLIST_STATE_SELECTED);
+        true -> ignore
+    end,
+    if is_integer(New) ->
+            wxListCtrl:setItemState(Grid, New, 16#FFFF, ?wxLIST_STATE_SELECTED),
+            wxListCtrl:ensureVisible(Grid, New);
+       true -> ignore
+    end,
+    {noreply, State#state{selected=New}};
 
 handle_info(_Event, State) ->
     {noreply, State}.
 
-terminate(_Event, _State) ->
+terminate(_Event, #state{holder=Holder}) ->
+    Holder ! stop,
     ok.
 
 code_change(_, _, State) ->
@@ -271,7 +287,7 @@ code_change(_, _, State) ->
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-create_menus(Parent, #opt{sys_hidden=Sys, unread_hidden=UnR, type=Type}) ->
+create_menus(Parent, #opts{sys_hidden=Sys, unread_hidden=UnR, type=Type}) ->
     MenuEntries = [{"View",
 		    [#create_menu{id = ?ID_TABLE_INFO, text = "Table information\tCtrl-I"},
 		     separator,
@@ -298,7 +314,7 @@ get_tables(Node, Opts) ->
 	Res ->
 	    Res
     end.
-get_tables2(Node, #opt{type=Type, sys_hidden=Sys, unread_hidden=Unread}) ->
+get_tables2(Node, #opts{type=Type, sys_hidden=Sys, unread_hidden=Unread}) ->
     Args = [Type, [{sys_hidden,Sys}, {unread_hidden,Unread}]],
     case rpc:call(Node, observer_backend, get_table_list, Args) of
 	{badrpc, Error} ->
@@ -386,49 +402,134 @@ list_to_strings([A]) -> integer_to_list(A);
 list_to_strings([A|B]) ->
     integer_to_list(A) ++ " ," ++ list_to_strings(B).
 
-update_grid(Grid, Selected, Opt, Tables) ->
-    wx:batch(fun() -> update_grid2(Grid, Selected, Opt, Tables) end).
-
-update_grid2(Grid, {SelName,SelId}, #opt{sort_key=Sort,sort_incr=Dir}, Tables) ->
-    wxListCtrl:deleteAllItems(Grid),
-    Update =
-	fun(#tab{name = Name, id = Id, owner = Owner, size = Size, memory = Memory,
-		 protection = Protection, reg_name = RegName},
-            {Row, Sel}) ->
-		_Item = wxListCtrl:insertItem(Grid, Row, ""),
-		if (Row rem 2) =:= 0 ->
-			wxListCtrl:setItemBackgroundColour(Grid, Row, ?BG_EVEN);
-		   true -> ignore
-		end,
-		if Protection == private ->
-			wxListCtrl:setItemTextColour(Grid, Row, {200,130,50});
-		   true -> ignore
-		end,
-
-		lists:foreach(fun({_, ignore}) -> ignore;
-				 ({Col, Val}) ->
-				      wxListCtrl:setItem(Grid, Row, Col, observer_lib:to_str(Val))
-			      end,
-			      [{0,Name}, {1,Size}, {2, Memory div 1024},
-			       {3,Owner}, {4,RegName}, {5,Id}]),
-                if SelName =:= Name, SelId =:= Id ->
-                        wxListCtrl:setItemState(Grid, Row, 16#FFFF, ?wxLIST_STATE_SELECTED),
-                        {Row+1, Row};
-                   true ->
-                        wxListCtrl:setItemState(Grid, Row, 0, ?wxLIST_STATE_SELECTED),
-                        {Row+1, Sel}
-                end
-	end,
-    ProcInfo = case Dir of
-		   false -> lists:reverse(lists:keysort(Sort, Tables));
-		   true -> lists:keysort(Sort, Tables)
-	       end,
-    {_, Sel} = lists:foldl(Update, {0, undefined}, ProcInfo),
-    {ProcInfo, Sel}.
-
-sel(#state{selected=Sel, tabs=Tabs}) ->
-    try lists:nth(Sel+1, Tabs) of
-        #tab{name=Name, id=Id} -> {Name, Id}
-    catch _:_ ->
-            {undefined, undefined}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%  Table holder needs to be in a separate process otherwise
+%%  the callback get_row/3 may deadlock if the process do
+%%  wx calls when callback is invoked.
+
+get_table(Table, Item) ->
+    get_row(Table, Item, all).
+
+get_row(Table, Item, Column) ->
+    Ref = erlang:monitor(process, Table),
+    Table ! {get_row, self(), Item, Column},
+    receive
+	{'DOWN', Ref, _, _, _} -> "";
+	{Table, Res} ->
+	    erlang:demonitor(Ref),
+	    Res
     end.
+
+get_attr(Table, Item) ->
+    Ref = erlang:monitor(process, Table),
+    Table ! {get_attr, self(), Item},
+    receive
+	{'DOWN', Ref, _, _, _} -> wx:null();
+	{Table, Res} ->
+	    erlang:demonitor(Ref),
+	    Res
+    end.
+
+-record(holder, {node, parent, pid,
+		 tabs=array:new(),
+                 sort=#sort{},
+		 attrs,
+                 sel
+		}).
+
+init_table_holder(Parent, Attrs) ->
+    Parent ! refresh,
+    table_holder(#holder{node=node(), parent=Parent, attrs=Attrs}).
+
+table_holder(S0 = #holder{parent=Parent, tabs=Tabs0, sel=Sel0}) ->
+    receive
+	{get_attr, From, Row} ->
+	    get_attr(From, Row, S0),
+	    table_holder(S0);
+	{get_row, From, Row, Col} ->
+	    get_row(From, Row, Col, Tabs0),
+	    table_holder(S0);
+	{sort, Col} ->
+            STab = get_sel(Sel0, Tabs0),
+	    Parent ! {refresh, 0, array:size(Tabs0)-1},
+            S1 = sort(col2key(Col), S0),
+            Sel = sel_idx(STab, S1#holder.tabs),
+            Parent ! {selected, Sel, array:size(Tabs0)},
+	    table_holder(S1#holder{sel=Sel});
+	{refresh, Tabs1} ->
+            STab = get_sel(Sel0, Tabs0),
+            Tabs = case S0#holder.sort of
+                       #sort{sort_incr=false, sort_key=Col} ->
+                           array:from_list(lists:reverse(lists:keysort(Col, Tabs1)));
+                       #sort{sort_key=Col} ->
+                           array:from_list(lists:keysort(Col, Tabs1))
+                   end,
+	    Parent ! {refresh, 0, array:size(Tabs)-1},
+            Sel = sel_idx(STab, Tabs),
+            Parent ! {selected, Sel,array:size(Tabs)},
+	    table_holder(S0#holder{tabs=Tabs, sel=Sel});
+        {selected, Sel} ->
+            table_holder(S0#holder{sel=Sel});
+	stop ->
+	    ok;
+	What ->
+	    io:format("Table holder got ~tp~n",[What]),
+	    Parent ! {refresh, 0, array:size(Tabs0)-1},
+	    table_holder(S0)
+    end.
+
+get_sel(undefined, _Tabs) ->
+    undefined;
+get_sel(Idx, Tabs) ->
+    array:get(Idx, Tabs).
+
+sel_idx(undefined, _Tabs) ->
+    undefined;
+sel_idx(Tab, Tabs) ->
+    Find = fun(Idx, C, Acc) -> C =:= Tab andalso throw({found, Idx}), Acc end,
+    try array:foldl(Find, undefined, Tabs)
+    catch {found, Idx} -> Idx
+    end.
+
+sort(Col, #holder{sort=#sort{sort_key=Col, sort_incr=Incr}=S, tabs=Table0}=H) ->
+    Table = lists:reverse(array:to_list(Table0)),
+    H#holder{sort=S#sort{sort_incr=(not Incr)},
+             tabs=array:from_list(Table)};
+sort(Col, #holder{sort=#sort{sort_incr=Incr}=S, tabs=Table0}=H) ->
+    Table = case Incr of
+                false -> lists:reverse(lists:keysort(Col, array:to_list(Table0)));
+                true -> lists:keysort(Col, array:to_list(Table0))
+            end,
+    H#holder{sort=S#sort{sort_key=Col},
+             tabs=array:from_list(Table)}.
+
+get_row(From, Row, Col, Table) ->
+    Object = array:get(Row, Table),
+    From ! {self(), get_col(Col, Object)}.
+
+get_col(all, Rec) ->
+    Rec;
+get_col(2, #tab{}=Rec) -> %% Memory in kB
+    observer_lib:to_str(element(#tab.memory, Rec) div 1024);
+get_col(Col, #tab{}=Rec) ->
+    case element(col2key(Col), Rec) of
+        ignore -> "";
+        Val -> observer_lib:to_str(Val)
+    end;
+get_col(_, _) ->
+    "".
+
+get_attr(From, Row, #holder{tabs=Tabs, attrs=Attrs}) ->
+    EvenOdd = case (Row rem 2) > 0 of
+                  true -> Attrs#attrs.odd;
+                  false -> Attrs#attrs.even
+              end,
+    What = try array:get(Row, Tabs) of
+               #tab{protection=private} ->
+                   Attrs#attrs.deleted;
+               _ ->
+                   EvenOdd
+           catch _ ->
+                   EvenOdd
+           end,
+    From ! {self(), What}.
diff --git a/lib/observer/test/crashdump_helper.erl b/lib/observer/test/crashdump_helper.erl
index f37d9057cb..b5e94a893a 100644
--- a/lib/observer/test/crashdump_helper.erl
+++ b/lib/observer/test/crashdump_helper.erl
@@ -19,7 +19,9 @@
 %%
 
 -module(crashdump_helper).
--export([n1_proc/2,remote_proc/2]).
+-export([n1_proc/2,remote_proc/2,
+         dump_maps/0,create_maps/0,
+         create_binaries/0,create_sub_binaries/1]).
 -compile(r18).
 -include_lib("common_test/include/ct.hrl").
 
@@ -60,7 +62,9 @@ n1_proc(Creator,_N2,Pid2,Port2,_L) ->
     put(ref,Ref),
     put(pid,Pid),
     put(bin,Bin),
+    put(bins,create_binaries()),
     put(sub_bin,SubBin),
+    put(sub_bins,create_sub_binaries(get(bins))),
     put(bignum,83974938738373873),
     put(neg_bignum,-38748762783736367),
     put(ext_pid,Pid2),
@@ -79,6 +83,7 @@ n1_proc(Creator,_N2,Pid2,Port2,_L) ->
     link(OtherPid), % own node
     link(Pid2),     % external node
     erlang:monitor(process,OtherPid),
+    erlang:monitor(process,init), % named process
     erlang:monitor(process,Pid2),
 
     code:load_file(?MODULE),
@@ -92,3 +97,49 @@ remote_proc(P1,Creator) ->
 		  Creator ! {self(),done},
 		  receive after infinity -> ok end
 	  end).
+
+create_binaries() ->
+    Sizes = lists:seq(60, 70) ++ lists:seq(120, 140),
+    [begin
+         <<H:16/unit:8>> = erlang:md5(<<Size:32>>),
+         Data = ((H bsl (8*150)) div (H+7919)),
+         <<Data:Size/unit:8>>
+     end || Size <- Sizes].
+
+create_sub_binaries(Bins) ->
+    [create_sub_binary(Bin, Start, LenSub) ||
+        Bin <- Bins,
+        Start <- [0,1,2,3,4,5,10,22],
+        LenSub <- [0,1,2,3,4,6,9]].
+
+create_sub_binary(Bin, Start, LenSub) ->
+    Len = byte_size(Bin) - LenSub - Start,
+    <<_:Start/bytes,Sub:Len/bytes,_/bytes>> = Bin,
+    Sub.
+
+%%%
+%%% Test dumping of maps. Dumping of maps only from OTP 20.2.
+%%%
+
+dump_maps() ->
+    Parent = self(),
+    F = fun() ->
+                register(aaaaaaaa_maps, self()),
+                put(maps, create_maps()),
+                Parent ! {self(),done},
+                receive _ -> ok end
+        end,
+    Pid = spawn_link(F),
+    receive
+        {Pid,done} ->
+            {ok,Pid}
+    end.
+
+create_maps() ->
+    Map0 = maps:from_list([{I,[I,I+1]} || I <- lists:seq(1, 40)]),
+    Map1 = maps:from_list([{I,{a,[I,I*I],{}}} || I <- lists:seq(1, 100)]),
+    Map2 = maps:from_list([{{I},(I*I) bsl 24} || I <- lists:seq(1, 10000)]),
+    Map3 = lists:foldl(fun(I, A) ->
+                               A#{I=>I*I}
+                       end, Map2, lists:seq(-10, 0)),
+    #{a=>Map0,b=>Map1,c=>Map2,d=>Map3,e=>#{}}.
diff --git a/lib/observer/test/crashdump_viewer_SUITE.erl b/lib/observer/test/crashdump_viewer_SUITE.erl
index f9ac884743..41ca3f3ce9 100644
--- a/lib/observer/test/crashdump_viewer_SUITE.erl
+++ b/lib/observer/test/crashdump_viewer_SUITE.erl
@@ -25,7 +25,7 @@
 %% Test functions
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
 	 start_stop/1,load_file/1,not_found_items/1,
-	 non_existing/1,not_a_crashdump/1,old_crashdump/1]).
+	 non_existing/1,not_a_crashdump/1,old_crashdump/1,new_crashdump/1]).
 -export([init_per_suite/1, end_per_suite/1]).
 -export([init_per_testcase/2, end_per_testcase/2]).
 
@@ -83,6 +83,7 @@ all() ->
      non_existing,
      not_a_crashdump,
      old_crashdump,
+     new_crashdump,
      load_file,
      not_found_items
     ].
@@ -212,6 +213,25 @@ not_a_crashdump(Config) when is_list(Config) ->
 
     ok = crashdump_viewer:stop().
 
+%% Try to load a file with newer version than this crashdump viewer can handle
+new_crashdump(Config) ->
+    Dump = hd(?config(dumps,Config)),
+    ok = start_backend(Dump),
+    {ok,{MaxVsn,CurrentVsn}} = crashdump_viewer:get_dump_versions(),
+    if MaxVsn =/= CurrentVsn ->
+            ct:fail("Current dump version is not equal to cdv's max version");
+       true ->
+            ok
+    end,
+    ok = crashdump_viewer:stop(),
+    NewerVsn = lists:join($.,[integer_to_list(X+1) || X <- MaxVsn]),
+    PrivDir = ?config(priv_dir,Config),
+    NewDump = filename:join(PrivDir,"new_erl_crash.dump"),
+    ok = file:write_file(NewDump,"=erl_crash_dump:"++NewerVsn++"\n"),
+    {error, Reason} = start_backend(NewDump),
+    "This Crashdump Viewer is too old" ++_ = Reason,
+    ok = crashdump_viewer:stop().
+
 %% Load files into the tool and view all pages
 load_file(Config) when is_list(Config) ->
     case ?t:is_debug() of
@@ -328,7 +348,7 @@ browse_file(File) ->
 
     io:format("  info read",[]),
 
-    lookat_all_pids(Procs),
+    lookat_all_pids(Procs,is_truncated(File),incomplete_allowed(File)),
     io:format("  pids ok",[]),
     lookat_all_ports(Ports),
     io:format("  ports ok",[]),
@@ -339,6 +359,21 @@ browse_file(File) ->
 
     Procs. % used as second arg to special/2
 
+is_truncated(File) ->
+    case filename:extension(File) of
+        ".trunc"++_ ->
+            true;
+        _ ->
+            false
+    end.
+
+incomplete_allowed(File) ->
+    %% Incomplete heap is allowed for native libs, since some literals
+    %% are not dumped - and for pre OTP-20 (really pre 20.2) releases,
+    %% since literals were not dumped at all then.
+    Rel = get_rel_from_dump_name(File),
+    Rel < 20 orelse test_server:is_native(lists).
+
 special(File,Procs) ->
     case filename:extension(File) of
 	".full_dist" ->
@@ -364,6 +399,14 @@ special(File,Procs) ->
 		crashdump_viewer:expand_binary({SOffset,SSize,SPos}),
 	    io:format("  expand binary ok",[]),
 
+            Binaries = crashdump_helper:create_binaries(),
+            verify_binaries(Binaries, proplists:get_value(bins,Dict)),
+	    io:format("  binaries ok",[]),
+
+            SubBinaries = crashdump_helper:create_sub_binaries(Binaries),
+            verify_binaries(SubBinaries, proplists:get_value(sub_bins,Dict)),
+	    io:format("  sub binaries ok",[]),
+
 	    #proc{last_calls=LastCalls} = ProcDetails,
             true = length(LastCalls) =< 4,
 
@@ -416,13 +459,36 @@ special(File,Procs) ->
 			old_attrib=undefined,
 			old_comp_info=undefined}=Mod2,
 	    ok;
+        ".trunc_mod" ->
+            ModName = atom_to_list(?helper_mod),
+            {ok,Mod=#loaded_mod{},[TW]} =
+                crashdump_viewer:loaded_mod_details(ModName),
+            "WARNING: The crash dump is truncated here."++_ = TW,
+            #loaded_mod{current_attrib=CA,current_comp_info=CCI,
+                        old_attrib=OA,old_comp_info=OCI} = Mod,
+            case lists:all(fun(undefined) ->
+                                   true;
+                              (S) when is_list(S) ->
+                                   io_lib:printable_unicode_list(lists:flatten(S));
+                              (_) -> false
+                           end,
+                           [CA,CCI,OA,OCI]) of
+                true ->
+                    ok;
+                false ->
+                    ct:fail({should_be_printable_strings_or_undefined,
+                             {CA,CCI,OA,OCI}})
+            end,
+            ok;
 	".trunc_bin1" ->
             %% This is 'full_dist' truncated after the first
             %% "=binary:"
             %% i.e. no binary exist in the dump
 	    [#proc{pid=Pid0}|_Rest] = lists:keysort(#proc.name,Procs),
 	    Pid = pid_to_list(Pid0),
-	    {ok,ProcDetails=#proc{},[]} = crashdump_viewer:proc_details(Pid),
+            %%WarnIncompleteHeap = ["WARNING: This process has an incomplete heap. Some information might be missing."],
+	    {ok,ProcDetails=#proc{},[]} =
+                crashdump_viewer:proc_details(Pid),
 	    io:format("  process details ok",[]),
 
 	    #proc{dict=Dict} = ProcDetails,
@@ -513,20 +579,56 @@ special(File,Procs) ->
             io:format("  unicode table name ok",[]),
 
             ok;
+        ".maps" ->
+	    %% I registered a process as aaaaaaaa_maps in the map dump
+	    %% to make sure it will be the first in the list when sorted
+	    %% on names.
+	    [#proc{pid=Pid0,name=Name}|_Rest] = lists:keysort(#proc.name,Procs),
+            "aaaaaaaa_maps" = Name,
+	    Pid = pid_to_list(Pid0),
+	    {ok,ProcDetails=#proc{},[]} = crashdump_viewer:proc_details(Pid),
+	    io:format("  process details ok",[]),
+
+	    #proc{dict=Dict} = ProcDetails,
+            %% io:format("~p\n", [Dict]),
+            Maps = crashdump_helper:create_maps(),
+            Maps = proplists:get_value(maps,Dict),
+            io:format("  maps ok",[]),
+            ok;
 	_ ->
 	    ok
     end,
     ok.
 
+verify_binaries([H|T1], [H|T2]) ->
+    %% Heap binary.
+    verify_binaries(T1, T2);
+verify_binaries([Bin|T1], [['#CDVBin',Offset,Size,Pos]|T2]) ->
+    %% Refc binary.
+    {ok,<<Bin:Size/binary>>} = crashdump_viewer:expand_binary({Offset,Size,Pos}),
+    verify_binaries(T1, T2);
+verify_binaries([], []) ->
+    ok.
 
-lookat_all_pids([]) ->
+lookat_all_pids([],_,_) ->
     ok;
-lookat_all_pids([#proc{pid=Pid0}|Procs]) ->
+lookat_all_pids([#proc{pid=Pid0}|Procs],TruncAllowed,IncompAllowed) ->
     Pid = pid_to_list(Pid0),
-    {ok,_ProcDetails=#proc{},_ProcTW} = crashdump_viewer:proc_details(Pid),
-    {ok,_Ets,_EtsTW} = crashdump_viewer:ets_tables(Pid),
-    {ok,_Timers,_TimersTW} = crashdump_viewer:timers(Pid),
-    lookat_all_pids(Procs).
+    {ok,_ProcDetails=#proc{},ProcTW} = crashdump_viewer:proc_details(Pid),
+    {ok,_Ets,EtsTW} = crashdump_viewer:ets_tables(Pid),
+    {ok,_Timers,TimersTW} = crashdump_viewer:timers(Pid),
+    case {ProcTW,EtsTW,TimersTW} of
+        {[],[],[]} ->
+            ok;
+        {["WARNING: This process has an incomplete heap."++_],[],[]}
+          when IncompAllowed ->
+            ok;  % native libs, literals might not be included in dump
+        _ when TruncAllowed ->
+            ok; % truncated dump
+        TWs ->
+            ct:fail({unexpected_warning,TWs})
+    end,
+    lookat_all_pids(Procs,TruncAllowed,IncompAllowed).
 
 lookat_all_ports([]) ->
     ok;
@@ -574,21 +676,35 @@ do_create_dumps(DataDir,Rel) ->
 	current ->
 	    CD3 = dump_with_args(DataDir,Rel,"instr","+Mim true"),
 	    CD4 = dump_with_strange_module_name(DataDir,Rel,"strangemodname"),
-	    Tmp = dump_with_args(DataDir,Rel,"trunc_bytes",""),
-            {ok,#file_info{size=Max}} = file:read_file_info(Tmp),
-            ok = file:delete(Tmp),
-            Bytes = max(15,rand:uniform(Max)),
-            CD5 = dump_with_args(DataDir,Rel,"trunc_bytes",
-                                 "-env ERL_CRASH_DUMP_BYTES " ++
-                                     integer_to_list(Bytes)),
+            CD5 = dump_with_size_limit_reached(DataDir,Rel,"trunc_bytes"),
             CD6 = dump_with_unicode_atoms(DataDir,Rel,"unicode"),
-            TruncatedDumps = truncate_dump(CD1),
-	    {[CD1,CD2,CD3,CD4,CD5,CD6|TruncatedDumps], DosDump};
+            CD7 = dump_with_maps(DataDir,Rel,"maps"),
+            TruncDumpMod = truncate_dump_mod(CD1),
+            TruncatedDumpsBinary = truncate_dump_binary(CD1),
+	    {[CD1,CD2,CD3,CD4,CD5,CD6,CD7,TruncDumpMod|TruncatedDumpsBinary],
+             DosDump};
 	_ ->
 	    {[CD1,CD2], DosDump}
     end.
 
-truncate_dump(File) ->
+truncate_dump_mod(File) ->
+    {ok,Bin} = file:read_file(File),
+    ModNameBin = atom_to_binary(?helper_mod,latin1),
+    NewLine = case os:type() of
+                  {win32,_} -> <<"\r\n">>;
+                  _ -> <<"\n">>
+              end,
+    RE = <<NewLine/binary,"=mod:",ModNameBin/binary,
+           NewLine/binary,"Current size: [0-9]*",
+           NewLine/binary,"Current attributes: ...">>,
+    {match,[{Pos,Len}]} = re:run(Bin,RE),
+    Size = Pos + Len,
+    <<Truncated:Size/binary,_/binary>> = Bin,
+    DumpName = filename:rootname(File) ++ ".trunc_mod",
+    file:write_file(DumpName,Truncated),
+    DumpName.
+
+truncate_dump_binary(File) ->
     {ok,Bin} = file:read_file(File),
     BinTag = <<"\n=binary:">>,
     Colon = <<":">>,
@@ -596,7 +712,10 @@ truncate_dump(File) ->
                   {win32,_} -> <<"\r\n">>;
                   _ -> <<"\n">>
               end,
-    [StartBin,AfterTag] = binary:split(Bin,BinTag),
+    %% Split after "our binary" created by crashdump_helper
+    %% (it may not be the first binary).
+    RE = <<"\n=binary:(?=[0-9A-Z]+",NewLine/binary,"FF:AQID)">>,
+    [StartBin,AfterTag] = re:split(Bin,RE,[{parts,2}]),
     [AddrAndSize,BinaryAndRest] = binary:split(AfterTag,Colon),
     [Binary,_Rest] = binary:split(BinaryAndRest,NewLine),
     TruncSize = byte_size(Binary) - 2,
@@ -689,6 +808,28 @@ dump_with_strange_module_name(DataDir,Rel,DumpName) ->
     ?t:stop_node(n1),
     CD.
 
+dump_with_size_limit_reached(DataDir,Rel,DumpName) ->
+    Tmp = dump_with_args(DataDir,Rel,DumpName,""),
+    {ok,#file_info{size=Max}} = file:read_file_info(Tmp),
+    ok = file:delete(Tmp),
+    dump_with_size_limit_reached(DataDir,Rel,DumpName,Max).
+
+dump_with_size_limit_reached(DataDir,Rel,DumpName,Max) ->
+    Bytes = max(15,rand:uniform(Max)),
+    CD = dump_with_args(DataDir,Rel,DumpName,
+                        "-env ERL_CRASH_DUMP_BYTES " ++
+                            integer_to_list(Bytes)),
+    {ok,#file_info{size=Size}} = file:read_file_info(CD),
+    if Size =< Bytes ->
+            %% This means that the dump was actually smaller than the
+            %% randomly selected truncation size, so we'll just do it
+            %% again with a smaller number
+            ok = file:delete(CD),
+            dump_with_size_limit_reached(DataDir,Rel,DumpName,Size-3);
+       true ->
+            CD
+    end.
+
 dump_with_unicode_atoms(DataDir,Rel,DumpName) ->
     Opt = rel_opt(Rel),
     Pz = "-pz \"" ++ filename:dirname(code:which(?MODULE)) ++ "\"",
@@ -699,6 +840,16 @@ dump_with_unicode_atoms(DataDir,Rel,DumpName) ->
     ?t:stop_node(n1),
     CD.
 
+dump_with_maps(DataDir,Rel,DumpName) ->
+    Opt = rel_opt(Rel),
+    Pz = "-pz \"" ++ filename:dirname(code:which(?MODULE)) ++ "\"",
+    PzOpt = [{args,Pz}],
+    {ok,N1} = ?t:start_node(n1,peer,Opt ++ PzOpt),
+    {ok,_Pid} = rpc:call(N1,crashdump_helper,dump_maps,[]),
+    CD = dump(N1,DataDir,Rel,DumpName),
+    ?t:stop_node(n1),
+    CD.
+
 dump(Node,DataDir,Rel,DumpName) ->
     Crashdump = filename:join(DataDir, dump_prefix(Rel)++DumpName),
     rpc:call(Node,os,putenv,["ERL_CRASH_DUMP",Crashdump]),
@@ -751,6 +902,11 @@ dump_prefix(current) ->
 dump_prefix(Rel) ->
     lists:concat(["r",Rel,"_dump."]).
 
+get_rel_from_dump_name(File) ->
+    Name = filename:basename(File),
+    ["r"++Rel|_] = string:split(Name,"_"),
+    list_to_integer(Rel).
+
 compat_rel(current) ->
     "";
 compat_rel(Rel) ->
diff --git a/lib/observer/test/observer_SUITE.erl b/lib/observer/test/observer_SUITE.erl
index 0db2c1ea77..fd4f93f662 100644
--- a/lib/observer/test/observer_SUITE.erl
+++ b/lib/observer/test/observer_SUITE.erl
@@ -113,7 +113,12 @@ appup_file(Config) when is_list(Config) ->
 basic(suite) -> [];
 basic(doc) -> [""];
 basic(Config) when is_list(Config) ->
-    timer:send_after(100, "foobar"), %% Otherwise the timer server gets added to procs
+    %% Start these before
+    wx:new(),
+    wx:destroy(),
+    timer:send_after(100, "foobar"),
+    {foo, node@machine} ! dummy_msg,  %% start distribution stuff
+    %% Otherwise ever lasting servers gets added to procs
     ProcsBefore = processes(),
     ProcInfoBefore = [{P,process_info(P)} || P <- ProcsBefore],
     NumProcsBefore = length(ProcsBefore),
diff --git a/lib/observer/vsn.mk b/lib/observer/vsn.mk
index 5f43198f85..74a6db768e 100644
--- a/lib/observer/vsn.mk
+++ b/lib/observer/vsn.mk
@@ -1 +1 @@
-OBSERVER_VSN = 2.5
+OBSERVER_VSN = 2.7
diff --git a/lib/odbc/doc/src/notes.xml b/lib/odbc/doc/src/notes.xml
index 6a8b0485eb..2aa55ca99c 100644
--- a/lib/odbc/doc/src/notes.xml
+++ b/lib/odbc/doc/src/notes.xml
@@ -32,7 +32,22 @@
   <p>This document describes the changes made to the odbc application.
   </p>
 
-  <section><title>ODBC 2.12</title>
+  <section><title>ODBC 2.12.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>ODBC 2.12</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/odbc/vsn.mk b/lib/odbc/vsn.mk
index 2e313570e1..3f7677a71d 100644
--- a/lib/odbc/vsn.mk
+++ b/lib/odbc/vsn.mk
@@ -1 +1 @@
-ODBC_VSN = 2.12
+ODBC_VSN = 2.12.1
diff --git a/lib/orber/doc/src/notes.xml b/lib/orber/doc/src/notes.xml
index 5a82270b28..35da4f73da 100644
--- a/lib/orber/doc/src/notes.xml
+++ b/lib/orber/doc/src/notes.xml
@@ -33,7 +33,28 @@
     <file>notes.xml</file>
   </header>
 
-  <section><title>Orber 3.8.3</title>
+  <section><title>Orber 3.8.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+        <item>
+	    <p> Removed the man warnings by using the code tag
+	    instead of c tag. </p>
+          <p>
+	    Own Id: OTP-14673</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Orber 3.8.3</title>
 
     <section><title>Improvements and New Features</title>
       <list>
diff --git a/lib/orber/vsn.mk b/lib/orber/vsn.mk
index 595e686cb7..bfd3f283b5 100644
--- a/lib/orber/vsn.mk
+++ b/lib/orber/vsn.mk
@@ -1 +1 @@
-ORBER_VSN = 3.8.3
+ORBER_VSN = 3.8.4
diff --git a/lib/os_mon/doc/src/notes.xml b/lib/os_mon/doc/src/notes.xml
index b29a64155e..cec0856a8b 100644
--- a/lib/os_mon/doc/src/notes.xml
+++ b/lib/os_mon/doc/src/notes.xml
@@ -31,6 +31,21 @@
   </header>
   <p>This document describes the changes made to the OS_Mon application.</p>
 
+<section><title>Os_Mon 2.4.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Os_Mon 2.4.3</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/os_mon/src/disksup.erl b/lib/os_mon/src/disksup.erl
index aeec335ba7..5118d807e1 100644
--- a/lib/os_mon/src/disksup.erl
+++ b/lib/os_mon/src/disksup.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1996-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -357,7 +357,7 @@ parse_df_take_word_percent(Input) ->
 %% and capacity), skip % sign, (optionally for susv3 can also skip IUsed, IFree
 %% and ICap% fields) then take remaining characters as the mount path
 -spec parse_df(string(), posix | susv3) ->
-    {error, parse_df} | {ok, {integer(), integer(), integer()}, string()}.
+    {error, parse_df} | {ok, {integer(), integer(), list()}, string()}.
 parse_df(Input0, Flavor) ->
     %% Format of Posix/Linux df output looks like Header + Lines
     %% Filesystem     1024-blocks     Used Available Capacity Mounted on
diff --git a/lib/os_mon/vsn.mk b/lib/os_mon/vsn.mk
index e4250f577b..eb4f13ea9e 100644
--- a/lib/os_mon/vsn.mk
+++ b/lib/os_mon/vsn.mk
@@ -1 +1 @@
-OS_MON_VSN = 2.4.3
+OS_MON_VSN = 2.4.4
diff --git a/lib/otp_mibs/doc/src/notes.xml b/lib/otp_mibs/doc/src/notes.xml
index dbd2f47ffb..c99148a904 100644
--- a/lib/otp_mibs/doc/src/notes.xml
+++ b/lib/otp_mibs/doc/src/notes.xml
@@ -32,6 +32,21 @@
   <p>This document describes the changes made to the OTP_Mibs
     application.</p>
 
+<section><title>Otp_Mibs 1.1.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Otp_Mibs 1.1.1</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/otp_mibs/vsn.mk b/lib/otp_mibs/vsn.mk
index 7a793007ee..13406cb5b1 100644
--- a/lib/otp_mibs/vsn.mk
+++ b/lib/otp_mibs/vsn.mk
@@ -1,4 +1,4 @@
-OTP_MIBS_VSN = 1.1.1
+OTP_MIBS_VSN = 1.1.2
 
 # Note: The branch 'otp_mibs' is defunct as of otp_mibs-1.0.4 and
 # should NOT be used again.
diff --git a/lib/parsetools/doc/src/notes.xml b/lib/parsetools/doc/src/notes.xml
index 3fa7169f50..b3370a06ab 100644
--- a/lib/parsetools/doc/src/notes.xml
+++ b/lib/parsetools/doc/src/notes.xml
@@ -31,6 +31,21 @@
   </header>
   <p>This document describes the changes made to the Parsetools application.</p>
 
+<section><title>Parsetools 2.1.6</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Warnings about unused functions in <c>leexinc.hrl</c>
+	    are suppressed. </p>
+          <p>
+	    Own Id: OTP-14697</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Parsetools 2.1.5</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/parsetools/include/leexinc.hrl b/lib/parsetools/include/leexinc.hrl
index b4449607cb..2a74c252ff 100644
--- a/lib/parsetools/include/leexinc.hrl
+++ b/lib/parsetools/include/leexinc.hrl
@@ -272,6 +272,8 @@ skip_cont(Rest, Line, {skip_token,Push}, Error) ->
 skip_cont(Rest, Line, {error,_S}, Error) ->
     skip_tokens(yystate(), Rest, Line, Rest, 0, Line, Error, reject, 0).
 
+-compile({nowarn_unused_function, [yyrev/1, yyrev/2, yypre/2, yysuf/2]}).
+
 yyrev(List) -> lists:reverse(List).
 yyrev(List, Tail) -> lists:reverse(List, Tail).
 yypre(List, N) -> lists:sublist(List, N).
@@ -282,6 +284,8 @@ yysuf(List, N) -> lists:nthtail(N, List).
 %% Line has been updated with respect to newlines in the prefix of
 %% Chars consisting of (TokenLength - AcceptLength) characters.
 
+-compile({nowarn_unused_function, adjust_line/4}).
+
 adjust_line(N, N, _Cs, L) -> L;
 adjust_line(T, A, [$\n|Cs], L) ->
     adjust_line(T-1, A, Cs, L-1);
diff --git a/lib/parsetools/include/yeccpre.hrl b/lib/parsetools/include/yeccpre.hrl
index 91d6cd49a6..53e8124aaa 100644
--- a/lib/parsetools/include/yeccpre.hrl
+++ b/lib/parsetools/include/yeccpre.hrl
@@ -56,8 +56,7 @@ return_error(Line, Message) ->
 yeccpars0(Tokens, Tzr, State, States, Vstack) ->
     try yeccpars1(Tokens, Tzr, State, States, Vstack)
     catch 
-        error: Error ->
-            Stacktrace = erlang:get_stacktrace(),
+        error: Error: Stacktrace ->
             try yecc_error_type(Error, Stacktrace) of
                 Desc ->
                     erlang:raise(error, {yecc_bug, ?CODE_VERSION, Desc},
diff --git a/lib/parsetools/src/yeccparser.erl b/lib/parsetools/src/yeccparser.erl
index 6f6f66d56c..45d91a83a3 100644
--- a/lib/parsetools/src/yeccparser.erl
+++ b/lib/parsetools/src/yeccparser.erl
@@ -72,8 +72,7 @@ return_error(Line, Message) ->
 yeccpars0(Tokens, Tzr, State, States, Vstack) ->
     try yeccpars1(Tokens, Tzr, State, States, Vstack)
     catch 
-        error: Error ->
-            Stacktrace = erlang:get_stacktrace(),
+        error: Error: Stacktrace ->
             try yecc_error_type(Error, Stacktrace) of
                 Desc ->
                     erlang:raise(error, {yecc_bug, ?CODE_VERSION, Desc},
@@ -167,21 +166,20 @@ yecctoken_location(Token) ->
     end.
 
 -compile({nowarn_unused_function, yecctoken2string/1}).
-yecctoken2string({atom, _, A}) -> io_lib:write(A);
+yecctoken2string({atom, _, A}) -> io_lib:write_atom(A);
 yecctoken2string({integer,_,N}) -> io_lib:write(N);
 yecctoken2string({float,_,F}) -> io_lib:write(F);
 yecctoken2string({char,_,C}) -> io_lib:write_char(C);
 yecctoken2string({var,_,V}) -> io_lib:format("~s", [V]);
 yecctoken2string({string,_,S}) -> io_lib:write_string(S);
 yecctoken2string({reserved_symbol, _, A}) -> io_lib:write(A);
-yecctoken2string({_Cat, _, Val}) -> io_lib:format("~p",[Val]);
+yecctoken2string({_Cat, _, Val}) -> io_lib:format("~tp", [Val]);
 yecctoken2string({dot, _}) -> "'.'";
-yecctoken2string({'$end', _}) ->
-    [];
+yecctoken2string({'$end', _}) -> [];
 yecctoken2string({Other, _}) when is_atom(Other) ->
-    io_lib:write(Other);
+    io_lib:write_atom(Other);
 yecctoken2string(Other) ->
-    io_lib:write(Other).
+    io_lib:format("~tp", [Other]).
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
diff --git a/lib/parsetools/test/yecc_SUITE.erl b/lib/parsetools/test/yecc_SUITE.erl
index a7166b91ed..2d3b15326b 100644
--- a/lib/parsetools/test/yecc_SUITE.erl
+++ b/lib/parsetools/test/yecc_SUITE.erl
@@ -1674,8 +1674,7 @@ format_error(Message) ->
 yeccpars0(Tokens, MFA) ->
     try yeccpars1(Tokens, MFA, 0, [], [])
     catch 
-        error: Error ->
-            Stacktrace = erlang:get_stacktrace(),
+        error: Error : Stacktrace ->
             try yecc_error_type(Error, Stacktrace) of
                 {syntax_error, Token} ->
                     yeccerror(Token);
diff --git a/lib/parsetools/vsn.mk b/lib/parsetools/vsn.mk
index 502ca00a47..b6d2ce0cd4 100644
--- a/lib/parsetools/vsn.mk
+++ b/lib/parsetools/vsn.mk
@@ -1 +1 @@
-PARSETOOLS_VSN = 2.1.5
+PARSETOOLS_VSN = 2.1.6
diff --git a/lib/public_key/asn1/PKCS-7.asn1 b/lib/public_key/asn1/PKCS-7.asn1
index e76f928acb..e9c188be39 100644
--- a/lib/public_key/asn1/PKCS-7.asn1
+++ b/lib/public_key/asn1/PKCS-7.asn1
@@ -124,7 +124,7 @@ SignerInfoAuthenticatedAttributes ::= CHOICE {
 
 -- Also defined in X.509
 -- Redeclared here as a parameterized type
-AlgorithmIdentifierPKSC-7 {ALGORITHM:IOSet} ::= SEQUENCE {
+AlgorithmIdentifierPKCS-7 {ALGORITHM:IOSet} ::= SEQUENCE {
    algorithm   ALGORITHM.&id({IOSet}),
    parameters  ALGORITHM.&Type({IOSet}{@algorithm}) OPTIONAL
 }
@@ -146,21 +146,21 @@ CRLSequence ::=
   SEQUENCE OF CertificateList
 
 ContentEncryptionAlgorithmIdentifier ::=
-  AlgorithmIdentifierPKSC-7 {{ContentEncryptionAlgorithms}}
+  AlgorithmIdentifierPKCS-7 {{ContentEncryptionAlgorithms}}
 
 ContentEncryptionAlgorithms ALGORITHM ::= {
   ...  -- add any application-specific algorithms here
 }
 
 DigestAlgorithmIdentifier ::=
-  AlgorithmIdentifierPKSC-7 {{DigestAlgorithms}}
+  AlgorithmIdentifierPKCS-7 {{DigestAlgorithms}}
 
 DigestAlgorithms ALGORITHM ::= {
    ...  -- add any application-specific algorithms here
 }
 
 DigestEncryptionAlgorithmIdentifier ::=
-  AlgorithmIdentifierPKSC-7 {{DigestEncryptionAlgorithms}}
+  AlgorithmIdentifierPKCS-7 {{DigestEncryptionAlgorithms}}
 
 DigestEncryptionAlgorithms ALGORITHM ::= {
   ...  -- add any application-specific algorithms here
@@ -182,7 +182,7 @@ IssuerAndSerialNumber ::= SEQUENCE {
 }
 
 KeyEncryptionAlgorithmIdentifier ::=
-  AlgorithmIdentifierPKSC-7 {{KeyEncryptionAlgorithms}}
+  AlgorithmIdentifierPKCS-7 {{KeyEncryptionAlgorithms}}
 
 KeyEncryptionAlgorithms ALGORITHM ::= {
   ...  -- add any application-specific algorithms here
diff --git a/lib/public_key/doc/src/notes.xml b/lib/public_key/doc/src/notes.xml
index 7a7c828760..11012ee9e5 100644
--- a/lib/public_key/doc/src/notes.xml
+++ b/lib/public_key/doc/src/notes.xml
@@ -35,6 +35,55 @@
     <file>notes.xml</file>
   </header>
 
+<section><title>Public_Key 1.5.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fixed a bug in <c>public_key:ssh_encode/2</c> that made
+	    it possible to erroneously encode e.g. an RSA key with
+	    another type e.g. ECDSA in the resulting binary.</p>
+          <p>
+	    Own Id: OTP-14570 Aux Id: ERIERL-52, OTP-14676 </p>
+        </item>
+        <item>
+          <p>
+	    Corrected handling of parameterized EC keys in
+	    public_key:generate_key/1 so that it will work as
+	    expected instead of causing a runtime error in crypto.</p>
+          <p>
+	    Own Id: OTP-14620</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Public_Key 1.5.1</title>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Hostname verification: Add handling of the general name
+	    <c>iPAddress</c> in certificate's subject alternative
+	    name extension (<c>subjAltName</c>).</p>
+          <p>
+	    Own Id: OTP-14653</p>
+        </item>
+        <item>
+          <p>
+	    Correct key handling in pkix_test_data/1 and use a
+	    generic example mail address instead of an existing one.</p>
+          <p>
+	    Own Id: OTP-14766</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Public_Key 1.5</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/public_key/doc/src/public_key.xml b/lib/public_key/doc/src/public_key.xml
index 5230cef496..dea35bc390 100644
--- a/lib/public_key/doc/src/public_key.xml
+++ b/lib/public_key/doc/src/public_key.xml
@@ -774,6 +774,7 @@ fun(#'DistributionPoint'{}, #'CertificateList'{},
 
   <func>
     <name>pkix_test_data(Options) -> Config </name>
+    <name>pkix_test_data([chain_opts()]) -> [conf_opt()]</name>
     <fsummary>Creates certificate test data.</fsummary>
     <type>
       <v>Options = #{chain_type() := chain_opts()} </v>
@@ -781,30 +782,83 @@ fun(#'DistributionPoint'{}, #'CertificateList'{},
       
       <v>chain_type() = server_chain | client_chain </v>
 
-      <v>chain_opts() = #{chain_end() := [cert_opt()],
-          intermediates => [[cert_opt()]]}</v>
-      <d>A valid chain must have at least a ROOT and a peer cert</d>
-
-      <v>chain_end() = root | peer </v>
-
+      <v>chain_opts() = #{root := [cert_opt()] | root_cert(),
+      peer := [cert_opt()],
+      intermediates => [[cert_opt()]]}</v>
+      <d>
+	A valid chain must have at least a ROOT and a peer cert.
+	The root cert can be given either as a cert pre-generated by
+	<seealso marker="#pkix_test_root_cert-2">
+	  pkix_test_root_cert/2
+	</seealso>, or as root cert generation options.
+      </d>
+      <v>root_cert() = #{cert := der_encoded(), key := Key}</v>
+      <d>
+	A root certificate generated by
+	<seealso marker="#pkix_test_root_cert-2">
+	  pkix_test_root_cert/2
+	</seealso>.
+      </d>
       <v>cert_opt() = {Key, Value}</v>
       <d>For available options see <seealso marker="#cert_opt"> cert_opt()</seealso> below.</d>
 
       <v>Config = #{server_config := [conf_opt()],
       client_config := [conf_opt()]}</v>
 
-      <v>conf_opt() = {cert, der_encoded()} | {key, der_encoded()} |{cacerts, [der_encoded()]}</v>
-      <d>This is a subset of the type <seealso marker="ssl:ssl#type-ssloption"> ssl:ssl_option()</seealso> </d>
+      <v>conf_opt() = {cert, der_encoded()} | {key, PrivateKey} |{cacerts, [der_encoded()]}</v>
+      <d>
+	This is a subset of the type
+	<seealso marker="ssl:ssl#type-ssloption"> ssl:ssl_option()</seealso>.
+	<c>PrivateKey</c> is what
+	<seealso marker="#generate_key-1">generate_key/1</seealso>
+	returns.
+      </d>
     </type>
     
     <desc>
-      <p>Creates certificate test data to facilitate automated testing
-      of applications using X509-certificates often through
-      SSL/TLS. The test data can be used when you have control
-      over both the client and the server in a test scenario.
+      <p>
+	Creates certificate configuration(s) consisting of certificate
+	and its private key plus CA certificate bundle, for a client
+	and a server, intended to facilitate automated testing
+	of applications using X509-certificates,
+	often through SSL/TLS. The test data can be used
+	when you have control over both the client and the server
+	in a test scenario.
+      </p>
+      <p>
+	When this function is called with a map containing
+	client and server chain specifications;
+	it generates both a client and a server certificate chain
+	where the <c>cacerts</c>
+	returned for the server contains the root cert the server
+	should trust and the intermediate certificates the server
+	should present to connecting clients.
+	The root cert the server should trust is the one used
+	as root of the client certificate chain.
+	Vice versa applies to the <c>cacerts</c> returned for the client.
+	The root cert(s) can either be pre-generated with
+	<seealso marker="#pkix_test_root_cert-2">
+	  pkix_test_root_cert/2
+	</seealso>, or if options are specified; it is (they are)
+	 generated.
+      </p>
+      <p>
+	When this function is called with a list of certificate options;
+	it generates a configuration with just one node certificate
+	where <c>cacerts</c> contains the root cert
+	and the intermediate certs that should be presented to a peer.
+	In this case the same root cert must be used for all peers.
+	This is useful in for example an Erlang distributed cluster
+	where any node,	towards another node, acts either
+	as a server or as a client depending on who connects to whom.
+	The generated certificate contains a subject altname,
+	which is not needed in a client certificate,
+	but makes the certificate useful for both roles.
+      </p>
+      <p>
+	The <marker id="cert_opt"/><c>cert_opt()</c>
+	type consists of the following options:
       </p>
-      
-      <p> The <marker id="cert_opt"/> cert_opt() type consists of the following options: </p>
       <taglist>
 	<tag> {digest, digest_type()}</tag>
 	<item><p>Hash algorithm to be used for
@@ -851,6 +905,36 @@ fun(#'DistributionPoint'{}, #'CertificateList'{},
     </desc>
   </func>
   
+  <func>
+    <name>pkix_test_root_cert(Name, Options) -> RootCert</name>
+    <fsummary>Generates a test data root cert.</fsummary>
+    <type>
+      <v>Name = string()</v>
+      <d>The root certificate name.</d>
+      <v>Options = [cert_opt()]</v>
+      <d>
+	For available options see
+	<seealso marker="#cert_opt">cert_opt()</seealso>
+	under
+	<seealso marker="#pkix_test_data-1">pkix_test_data/1</seealso>.
+      </d>
+      <v>RootCert = #{cert := der_encoded(), key := Key}</v>
+      <d>
+	A root certificate and key.  The <c>Key</c> is generated by
+	<seealso marker="#generate_key-1">generate_key/1</seealso>.
+      </d>
+    </type>
+    <desc>
+      <p>
+	Generates a root certificate that can be used
+	in multiple calls to
+	<seealso marker="#pkix_test_data-1">pkix_test_data/1</seealso>
+	when you want the same root certificate for
+	several generated certificates.
+      </p>
+    </desc>
+  </func>
+
   <func>  
     <name>pkix_verify(Cert, Key) -> boolean()</name>
     <fsummary>Verifies PKIX x.509 certificate signature.</fsummary>
diff --git a/lib/public_key/doc/src/public_key_records.xml b/lib/public_key/doc/src/public_key_records.xml
index 739310c88b..9ebdbb244d 100644
--- a/lib/public_key/doc/src/public_key_records.xml
+++ b/lib/public_key/doc/src/public_key_records.xml
@@ -70,10 +70,10 @@
       <p><c>| {dNSName, string()}</c></p>
       <p><c>| {x400Address, string()}</c></p>
       <p><c>| {directoryName, {rdnSequence, [#AttributeTypeAndValue'{}]}}</c></p>
-      <p><c>| {eidPartyName, special_string()}</c></p>
-      <p><c>| {eidPartyName, special_string(), special_string()}</c></p>
+      <p><c>| {ediPartyName, special_string()}</c></p>
+      <p><c>| {ediPartyName, special_string(), special_string()}</c></p>
       <p><c>| {uniformResourceIdentifier, string()}</c></p>
-      <p><c>| {ipAddress, string()}</c></p>
+      <p><c>| {iPAddress, string()}</c></p>
       <p><c>| {registeredId, oid()}</c></p>
       <p><c>| {otherName, term()}</c></p>
       </item>
diff --git a/lib/public_key/src/pubkey_cert.erl b/lib/public_key/src/pubkey_cert.erl
index 13833830a7..c0d7b9be8e 100644
--- a/lib/public_key/src/pubkey_cert.erl
+++ b/lib/public_key/src/pubkey_cert.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2008-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -33,11 +33,12 @@
 	 is_fixed_dh_cert/1, verify_data/1, verify_fun/4, 
 	 select_extension/2, match_name/3,
 	 extensions_list/1, cert_auth_key_id/1, time_str_2_gregorian_sec/1,
-         gen_test_certs/1]).
+         gen_test_certs/1, root_cert/2]).
 
 -define(NULL, 0).
 
--export_type([chain_opts/0, test_config/0]).
+-export_type([cert_opt/0, chain_opts/0, conf_opt/0,
+              test_config/0, test_root_cert/0]).
 
 -type cert_opt()  :: {digest, public_key:digest_type()} | 
                      {key, public_key:key_params() | public_key:private_key()} | 
@@ -46,9 +47,12 @@
 -type chain_end()   :: root | peer.
 -type chain_opts()  :: #{chain_end() := [cert_opt()],  intermediates =>  [[cert_opt()]]}.
 -type conf_opt()    :: {cert, public_key:der_encoded()} | 
-                       {key,  public_key:der_encoded()} |
+                       {key,  public_key:private_key()} |
                        {cacerts, [public_key:der_encoded()]}.
--type test_config() :: #{server_config := [conf_opt()],  client_config :=  [conf_opt()]}.
+-type test_config() ::
+        #{server_config := [conf_opt()],  client_config :=  [conf_opt()]}.
+-type test_root_cert() ::
+        #{cert := binary(), key := public_key:private_key()}.
 %%====================================================================
 %% Internal application APIu
 %%====================================================================
@@ -367,23 +371,23 @@ match_name(directoryName, DirName,  [PermittedName | Rest]) ->
     match_name(fun is_rdnSeq/2, DirName, PermittedName, Rest);
 
 match_name(uniformResourceIdentifier, URI,  [PermittedName | Rest]) ->
-    case split_uri(URI) of
-	incomplete ->
-	    false;
-	{_, _, Host, _, _} ->
-	    PN = case split_uri(PermittedName) of
-		     {_, _, PNhost, _, _} -> PNhost;
+    case uri_string:normalize(URI, [return_map]) of
+	#{host := Host} ->
+	    PN = case uri_string:normalize(PermittedName, [return_map]) of
+		     #{host := PNhost} -> PNhost;
 		     _X -> PermittedName
 		 end,
-	    match_name(fun is_valid_host_or_domain/2, Host, PN, Rest)
+	    match_name(fun is_valid_host_or_domain/2, Host, PN, Rest);
+        _ ->
+            false
     end;
 
 match_name(emailAddress, Name, [PermittedName | Rest]) ->
     Fun = fun(Email, PermittedEmail) ->
-		  is_valid_email_address(Email, PermittedEmail,
-				   string:tokens(PermittedEmail,"@"))
-	  end,
-     match_name(Fun, Name, PermittedName, Rest);
+                  is_valid_email_address(Email, PermittedEmail,
+                                         string:tokens(PermittedEmail,"@"))
+          end,
+    match_name(Fun, Name, PermittedName, Rest);
 
 match_name(dNSName, Name, [PermittedName | Rest]) ->
     Fun = fun(Domain, [$.|Domain]) -> true;
@@ -430,31 +434,94 @@ match_name(Fun, Name, PermittedName, [Head | Tail]) ->
 	false ->
 	    match_name(Fun, Name, Head, Tail)
     end.
+
 %%%
--spec gen_test_certs(#{server_chain:= chain_opts(), client_chain:= chain_opts()}) -> test_config().
- 
-%% Generates server and and client configuration for testing 
+-spec gen_test_certs(#{server_chain:= chain_opts(),
+                       client_chain:= chain_opts()} |
+                     chain_opts()) ->
+                            test_config() |
+                            [conf_opt()].
+%%
+%% Generates server and and client configuration for testing
 %% purposes. All certificate options have default values
-gen_test_certs(#{client_chain := #{root := ClientRootConf,
-                                   intermediates := ClientCAs,
-                                   peer := ClientPeer}, 
-                 server_chain := 
-                     #{root := ServerRootConf,
-                       intermediates := ServerCAs,
-                       peer := ServerPeer}}) ->
-    SRootKey = gen_key(proplists:get_value(key, ServerRootConf, default_key_gen())),
-    CRootKey = gen_key(proplists:get_value(key, ClientRootConf, default_key_gen())),
-    ServerRoot = root_cert("server", SRootKey, ClientRootConf),
-    ClientRoot = root_cert("client", CRootKey, ServerRootConf),
-    
-    [{ServerDERCert, ServerDERKey} | ServerCAsKeys] = config(server, ServerRoot, 
-                                                       SRootKey, lists:reverse([ServerPeer | lists:reverse(ServerCAs)])),
-    [{ClientDERCert, ClientDERKey} | ClientCAsKeys] = config(client, ClientRoot, 
-                                                       CRootKey, lists:reverse([ClientPeer | lists:reverse(ClientCAs)])),
-    ServerDERCA = ca_config(ClientRoot, ServerCAsKeys),
-    ClientDERCA = ca_config(ServerRoot, ClientCAsKeys),
-    #{server_config => [{cert, ServerDERCert}, {key, ServerDERKey}, {cacerts, ServerDERCA}], 
-      client_config => [{cert, ClientDERCert}, {key, ClientDERKey}, {cacerts, ClientDERCA}]}.
+gen_test_certs(
+  #{client_chain :=
+        #{root := ClientRoot,
+          intermediates := ClientCAs,
+          peer := ClientPeer},
+    server_chain :=
+        #{root := ServerRoot,
+          intermediates := ServerCAs,
+          peer := ServerPeer}}) ->
+    #{cert := ServerRootCert, key := ServerRootKey} =
+        case ServerRoot of
+            #{} ->
+                ServerRoot;
+            ServerRootConf when is_list(ServerRootConf) ->
+                root_cert("SERVER ROOT CA", ServerRootConf)
+        end,
+    #{cert := ClientRootCert, key := ClientRootKey} =
+        case ClientRoot of
+            #{} ->
+                ClientRoot;
+            ClientRootConf when is_list(ClientRootConf) ->
+                root_cert("CLIENT ROOT CA", ClientRootConf)
+        end,
+    [{ServerDERCert, ServerDERKey} | ServerCAsKeys] =
+        config(
+          server, ServerRootCert, ServerRootKey,
+          lists:reverse([ServerPeer | lists:reverse(ServerCAs)])),
+    [{ClientDERCert, ClientDERKey} | ClientCAsKeys] =
+        config(
+          client, ClientRootCert, ClientRootKey,
+          lists:reverse([ClientPeer | lists:reverse(ClientCAs)])),
+    ServerDERCA = ca_config(ClientRootCert, ServerCAsKeys),
+    ClientDERCA = ca_config(ServerRootCert, ClientCAsKeys),
+    #{server_config =>
+          [{cert, ServerDERCert}, {key, ServerDERKey},
+           {cacerts, ServerDERCA}],
+      client_config =>
+          [{cert, ClientDERCert}, {key, ClientDERKey},
+           {cacerts, ClientDERCA}]};
+%%
+%% Generates a node configuration for testing purposes,
+%% when using the node server cert also for the client.
+%% All certificate options have default values
+gen_test_certs(
+  #{root := Root, intermediates := CAs, peer := Peer}) ->
+    #{cert := RootCert, key := RootKey} =
+        case Root of
+            #{} ->
+                Root;
+            RootConf when is_list(RootConf) ->
+                root_cert("SERVER ROOT CA", RootConf)
+        end,
+    [{DERCert, DERKey} | CAsKeys] =
+        config(
+          server, RootCert, RootKey,
+          lists:reverse([Peer | lists:reverse(CAs)])),
+    DERCAs = ca_config(RootCert, CAsKeys),
+    [{cert, DERCert}, {key, DERKey}, {cacerts, DERCAs}].
+
+%%%
+-spec root_cert(string(), [cert_opt()]) -> test_root_cert().
+%%
+%% Generate a self-signed root cert
+root_cert(Name, Opts) ->
+    PrivKey = gen_key(proplists:get_value(key, Opts, default_key_gen())),
+    TBS = cert_template(),
+    Issuer = subject("root", Name),
+    OTPTBS =
+        TBS#'OTPTBSCertificate'{
+          signature = sign_algorithm(PrivKey, Opts),
+          issuer = Issuer,
+          validity = validity(Opts),
+          subject = Issuer,
+          subjectPublicKeyInfo = public_key(PrivKey),
+          extensions = extensions(undefined, ca, Opts)
+         },
+    #{cert => public_key:pkix_sign(OTPTBS, PrivKey),
+      key => PrivKey}.
 
 %%--------------------------------------------------------------------
 %%% Internal functions
@@ -801,75 +868,12 @@ is_valid_subject_alt_name({otherName, #'AnotherName'{}}) ->
 is_valid_subject_alt_name({_, _}) ->
     false.
 
-is_ip_address(Address) ->
-    case inet_parse:address(Address) of
-	{ok, _} ->
-	    true;
-	_ ->
-	    false
-    end.
-
-is_fully_qualified_name(_Name) ->
-    true.
-
 is_valid_uri(AbsURI) -> 
-    case split_uri(AbsURI) of
-	incomplete ->
-	    false;
-	{StrScheme, _, Host, _, _} ->
-	    case string:to_lower(StrScheme) of
-		Scheme when Scheme =:= "http"; Scheme =:= "ftp" ->
-		    is_valid_host(Host);
-		_ ->
-		    false
-	    end
-    end.
-
-is_valid_host(Host) ->
-    case is_ip_address(Host) of
-	true ->
-	    true;   
-	false -> 
-	    is_fully_qualified_name(Host)
-    end.
-
-%% Could have a more general split URI in stdlib? Maybe when
-%% regexs are improved. Needed also in inets!
-split_uri(Uri) ->
-    case split_uri(Uri, ":", {error, no_scheme}, 1, 1) of
-	{error, no_scheme} ->
-	    incomplete;
-	{StrScheme, "//" ++ URIPart} ->
-	    {Authority, PathQuery} = 
-		split_auth_path(URIPart),
-	    {UserInfo, HostPort} = 
-		split_uri(Authority, "@", {"", Authority}, 1, 1),
-	    {Host, Port} = 
-		split_uri(HostPort, ":", {HostPort, dummy_port}, 1, 1),
-	    {StrScheme, UserInfo, Host, Port, PathQuery}
-    end.
-
-split_auth_path(URIPart) ->
-    case split_uri(URIPart, "/", URIPart, 1, 0) of
-	Split = {_, _} ->
-	    Split;
-	URIPart ->
-	    case split_uri(URIPart, "\\?", URIPart, 1, 0) of
-		Split = {_, _} ->
-		    Split;
-		URIPart ->
-		    {URIPart,""}
-	    end
-    end.
-
-split_uri(UriPart, SplitChar, NoMatchResult, SkipLeft, SkipRight) ->
-    case re:run(UriPart, SplitChar) of
-	{match,[{Start, _}]} ->
-	    StrPos = Start + 1,
-	    {string:substr(UriPart, 1, StrPos - SkipLeft),
-	     string:substr(UriPart, StrPos + SkipRight, length(UriPart))}; 
-	nomatch ->
-	    NoMatchResult
+    case uri_string:normalize(AbsURI, [return_map]) of
+        #{scheme := _} ->
+            true;
+        _ ->
+            false
     end.
 
 is_rdnSeq({rdnSequence,[]}, {rdnSequence,[none]}) -> 
@@ -1103,7 +1107,7 @@ missing_basic_constraints(OtpCert, SelfSigned, ValidationState, VerifyFun, UserS
 	     UserState}
     end.
 
- gen_key(KeyGen) ->
+gen_key(KeyGen) ->
      case is_key(KeyGen) of
          true ->
              KeyGen;
@@ -1120,31 +1124,17 @@ is_key(#'ECPrivateKey'{}) ->
 is_key(_) ->
     false.
 
-root_cert(Role, PrivKey, Opts) ->
-     TBS = cert_template(),
-     Issuer = issuer("root", Role, " ROOT CA"),
-     OTPTBS = TBS#'OTPTBSCertificate'{
-                signature = sign_algorithm(PrivKey, Opts),
-                issuer = Issuer,
-                validity = validity(Opts),  
-                subject = Issuer,
-                subjectPublicKeyInfo = public_key(PrivKey),
-                extensions = extensions(Role, ca, Opts)
-               },
-     public_key:pkix_sign(OTPTBS, PrivKey).
 
 cert_template() ->
     #'OTPTBSCertificate'{
        version = v3,              
-       serialNumber = trunc(rand:uniform()*100000000)*10000 + 1,
+       serialNumber = erlang:unique_integer([positive, monotonic]),
        issuerUniqueID = asn1_NOVALUE,       
        subjectUniqueID = asn1_NOVALUE
       }.
-issuer(Contact, Role, Name) ->
-  subject(Contact, Role ++ Name).
 
 subject(Contact, Name) ->
-    Opts = [{email, Contact ++ "@erlang.org"},
+    Opts = [{email, Contact ++ "@example.org"},
 	    {name,  Name},
 	    {city, "Stockholm"},
 	    {country, "SE"},
@@ -1176,9 +1166,11 @@ validity(Opts) ->
     DefFrom0 = calendar:gregorian_days_to_date(calendar:date_to_gregorian_days(date())-1),
     DefTo0   = calendar:gregorian_days_to_date(calendar:date_to_gregorian_days(date())+7),
     {DefFrom, DefTo} = proplists:get_value(validity, Opts, {DefFrom0, DefTo0}),
-    Format = fun({Y,M,D}) -> 
-                     lists:flatten(io_lib:format("~w~2..0w~2..0w000000Z",[Y,M,D])) 
-             end,
+    Format =
+        fun({Y,M,D}) ->
+                lists:flatten(
+                  io_lib:format("~4..0w~2..0w~2..0w000000Z",[Y,M,D]))
+        end,
     #'Validity'{notBefore={generalTime, Format(DefFrom)},
 		notAfter ={generalTime, Format(DefTo)}}.
 
@@ -1223,12 +1215,12 @@ cert_chain(Role, IssuerCert, IssuerKey, [PeerOpts], _, Acc) ->
     Key = gen_key(proplists:get_value(key, PeerOpts, default_key_gen())),
     Cert = cert(Role, public_key:pkix_decode_cert(IssuerCert, otp), 
                 IssuerKey, Key, "admin", " Peer cert", PeerOpts, peer),
-    [{Cert, Key}, {IssuerCert, IssuerKey} | Acc];
+    [{Cert, encode_key(Key)}, {IssuerCert, encode_key(IssuerKey)} | Acc];
 cert_chain(Role, IssuerCert, IssuerKey, [CAOpts | Rest], N, Acc) ->
     Key = gen_key(proplists:get_value(key, CAOpts, default_key_gen())),
     Cert = cert(Role, public_key:pkix_decode_cert(IssuerCert, otp), IssuerKey, Key, "webadmin", 
                 " Intermidiate CA " ++ integer_to_list(N), CAOpts, ca),
-    cert_chain(Role, Cert, Key, Rest, N+1, [{IssuerCert, IssuerKey} | Acc]).
+    cert_chain(Role, Cert, Key, Rest, N+1, [{IssuerCert, encode_key(IssuerKey)} | Acc]).
 
 cert(Role, #'OTPCertificate'{tbsCertificate = #'OTPTBSCertificate'{subject = Issuer}}, 
      PrivKey, Key, Contact, Name, Opts, Type) ->
@@ -1240,7 +1232,6 @@ cert(Role, #'OTPCertificate'{tbsCertificate = #'OTPTBSCertificate'{subject = Iss
                subject = subject(Contact, atom_to_list(Role) ++ Name),
                subjectPublicKeyInfo = public_key(Key),
                extensions = extensions(Role, Type, Opts)
-               
               },
     public_key:pkix_sign(OTPTBS, PrivKey).
 
@@ -1297,7 +1288,7 @@ add_default_extensions(server, peer, Exts) ->
               ],
     add_default_extensions(Default, Exts);
     
-add_default_extensions(_, peer, Exts) ->
+add_default_extensions(client, peer, Exts) ->
     Exts.
 
 add_default_extensions(Defaults0, Exts) ->
@@ -1311,3 +1302,10 @@ add_default_extensions(Defaults0, Exts) ->
                                end, Defaults0),
     Exts ++ Defaults.
 
+encode_key(#'RSAPrivateKey'{} = Key) ->
+    {'RSAPrivateKey', public_key:der_encode('RSAPrivateKey', Key)};
+encode_key(#'ECPrivateKey'{} = Key) ->
+    {'ECPrivateKey', public_key:der_encode('ECPrivateKey', Key)};
+encode_key(#'DSAPrivateKey'{} = Key) ->
+    {'DSAPrivateKey', public_key:der_encode('DSAPrivateKey', Key)}.
+
diff --git a/lib/public_key/src/pubkey_ssh.erl b/lib/public_key/src/pubkey_ssh.erl
index a7d018e440..02c061efc9 100644
--- a/lib/public_key/src/pubkey_ssh.erl
+++ b/lib/public_key/src/pubkey_ssh.erl
@@ -38,6 +38,8 @@
 -define(Empint(X),  (mpint(X))/binary ).
 -define(Estring(X), (string(X))/binary ).
 
+-define(b64enc(X), base64:encode(iolist_to_binary(X)) ).
+-define(b64mime_dec(X), base64:mime_decode(iolist_to_binary(X)) ).
 
 %% Max encoded line length is 72, but conformance examples use 68
 %% Comment from rfc 4716: "The following are some examples of public
@@ -163,7 +165,7 @@ rfc4716_decode_line(Line, Lines, Acc) ->
 	    rfc4716_decode_lines(Lines, [{string_decode(Tag), unicode_decode(Value)} | Acc]);
 	_ ->
 	    {Body, Rest} = join_entry([Line | Lines], []),
-	    {lists:reverse(Acc), rfc4716_pubkey_decode(base64:mime_decode(Body)), Rest}
+	    {lists:reverse(Acc), rfc4716_pubkey_decode(?b64mime_dec(Body)), Rest}
     end.
 
 join_entry([<<"---- END SSH2 PUBLIC KEY ----", _/binary>>| Lines], Entry) ->
@@ -257,11 +259,11 @@ decode_comment(Comment) ->
 
 openssh_pubkey_decode(Type,  Base64Enc) ->
     try
-        <<?DEC_BIN(Type,_TL), Bin/binary>> = base64:mime_decode(Base64Enc),
+        <<?DEC_BIN(Type,_TL), Bin/binary>> = ?b64mime_dec(Base64Enc),
 	ssh2_pubkey_decode(Type,  Bin)
     catch
 	_:_ ->
-	    {Type, base64:mime_decode(Base64Enc)}
+	    {Type, ?b64mime_dec(Base64Enc)}
     end.
 
 
@@ -292,12 +294,12 @@ do_encode(Type, Key, Attributes) ->
 
 rfc4716_encode(Key, [],[]) ->
     iolist_to_binary([begin_marker(),"\n",
-			     split_lines(base64:encode(ssh2_pubkey_encode(Key))),
+			     split_lines(?b64enc(ssh2_pubkey_encode(Key))),
 			     "\n", end_marker(), "\n"]);
 rfc4716_encode(Key, [], [_|_] = Acc) ->
     iolist_to_binary([begin_marker(), "\n",
 			     lists:reverse(Acc),
-			     split_lines(base64:encode(ssh2_pubkey_encode(Key))),
+			     split_lines(?b64enc(ssh2_pubkey_encode(Key))),
 			     "\n", end_marker(), "\n"]);
 rfc4716_encode(Key, [ Header | Headers], Acc) ->
     LinesStr = rfc4716_encode_header(Header),
@@ -326,7 +328,7 @@ rfc4716_encode_value(Value) ->
 
 openssh_encode(openssh_public_key, Key, Attributes) ->
     Comment = proplists:get_value(comment, Attributes, ""),
-    Enc = base64:encode(ssh2_pubkey_encode(Key)),
+    Enc = ?b64enc(ssh2_pubkey_encode(Key)),
     iolist_to_binary([key_type(Key), " ",  Enc,  " ", Comment, "\n"]);
 
 openssh_encode(auth_keys, Key, Attributes) ->
@@ -351,10 +353,10 @@ openssh_encode(known_hosts, Key, Attributes) ->
     end.
 
 openssh_ssh2_auth_keys_encode(undefined, Key, Comment) ->
-    iolist_to_binary([key_type(Key)," ",  base64:encode(ssh2_pubkey_encode(Key)), line_end(Comment)]);
+    iolist_to_binary([key_type(Key)," ",  ?b64enc(ssh2_pubkey_encode(Key)), line_end(Comment)]);
 openssh_ssh2_auth_keys_encode(Options, Key, Comment) ->
     iolist_to_binary([comma_list_encode(Options, []), " ",
-			     key_type(Key)," ", base64:encode(ssh2_pubkey_encode(Key)), line_end(Comment)]).
+			     key_type(Key)," ", ?b64enc(ssh2_pubkey_encode(Key)), line_end(Comment)]).
 
 openssh_ssh1_auth_keys_encode(undefined, Bits,
 			      #'RSAPublicKey'{modulus = N, publicExponent = E},
@@ -369,7 +371,7 @@ openssh_ssh1_auth_keys_encode(Options, Bits,
 
 openssh_ssh2_know_hosts_encode(Hostnames, Key, Comment) ->
     iolist_to_binary([comma_list_encode(Hostnames, []), " ",
-			     key_type(Key)," ",  base64:encode(ssh2_pubkey_encode(Key)), line_end(Comment)]).
+			     key_type(Key)," ",  ?b64enc(ssh2_pubkey_encode(Key)), line_end(Comment)]).
 
 openssh_ssh1_known_hosts_encode(Hostnames, Bits,
 				#'RSAPublicKey'{modulus = N, publicExponent = E},
diff --git a/lib/public_key/src/public_key.app.src b/lib/public_key/src/public_key.app.src
index dbd732c384..5833141e87 100644
--- a/lib/public_key/src/public_key.app.src
+++ b/lib/public_key/src/public_key.app.src
@@ -14,7 +14,7 @@
    {applications, [asn1, crypto, kernel, stdlib]},
    {registered, []},
    {env, []},
-   {runtime_dependencies, ["stdlib-2.0","kernel-3.0","erts-6.0","crypto-3.8",
+   {runtime_dependencies, ["stdlib-3.5","kernel-3.0","erts-6.0","crypto-3.8",
 			   "asn1-3.0"]}
    ]
 }.
diff --git a/lib/public_key/src/public_key.erl b/lib/public_key/src/public_key.erl
index c6ab4d06ae..931901640a 100644
--- a/lib/public_key/src/public_key.erl
+++ b/lib/public_key/src/public_key.erl
@@ -59,7 +59,8 @@
 	 pkix_crl_verify/2,
 	 pkix_crl_issuer/1,
 	 short_name_hash/1,
-         pkix_test_data/1
+         pkix_test_data/1,
+         pkix_test_root_cert/2
 	]).
 
 -export_type([public_key/0, private_key/0, pem_entry/0,
@@ -850,10 +851,10 @@ pkix_crls_validate(OtpCert, DPAndCRLs0, Options) ->
 
 %--------------------------------------------------------------------
 -spec pkix_verify_hostname(Cert :: #'OTPCertificate'{} | binary(),
-			   ReferenceIDs :: [{uri_id | dns_id | oid(),  string()}]) -> boolean().
+			   ReferenceIDs :: [{uri_id | dns_id | ip | srv_id | oid(),  string()}]) -> boolean().
 
 -spec pkix_verify_hostname(Cert :: #'OTPCertificate'{} | binary(),
-			   ReferenceIDs :: [{uri_id | dns_id | oid(),  string()}],
+			   ReferenceIDs :: [{uri_id | dns_id | ip | srv_id | oid(),  string()}],
 			   Options :: proplists:proplist()) -> boolean().
 
 %% Description: Validates a hostname to RFC 6125
@@ -1033,10 +1034,12 @@ short_name_hash({rdnSequence, _Attributes} = Name) ->
 
 
 %%--------------------------------------------------------------------
--spec pkix_test_data(#{chain_type() := pubkey_cert:chain_opts()}) ->
-                            pubkey_cert:test_config().
+-spec pkix_test_data(#{chain_type() := pubkey_cert:chain_opts()} |
+                     pubkey_cert:chain_opts()) ->
+                            pubkey_cert:test_config() |
+                            [pubkey_cert:conf_opt()].
 
-%% Description: Generates OpenSSL-style hash of a name.
+%% Description: Generates cert(s) and ssl configuration
 %%--------------------------------------------------------------------
 
 pkix_test_data(#{client_chain := ClientChain0,
@@ -1045,7 +1048,21 @@ pkix_test_data(#{client_chain := ClientChain0,
     ClientChain = maps:merge(Default, ClientChain0),
     ServerChain = maps:merge(Default, ServerChain0),
     pubkey_cert:gen_test_certs(#{client_chain => ClientChain,
-                                 server_chain => ServerChain}).
+                                 server_chain => ServerChain});
+pkix_test_data(#{} = Chain) ->
+    Default = #{intermediates => []},
+    pubkey_cert:gen_test_certs(maps:merge(Default, Chain)).
+
+%%--------------------------------------------------------------------
+-spec pkix_test_root_cert(
+        Name :: string(), Opts :: [pubkey_cert:cert_opt()]) ->
+                                 pubkey_cert:test_root_cert().
+
+%% Description: Generates a root cert suitable for pkix_test_data/1
+%%--------------------------------------------------------------------
+
+pkix_test_root_cert(Name, Opts) ->
+    pubkey_cert:root_cert(Name, Opts).
 
 %%--------------------------------------------------------------------
 %%% Internal functions
@@ -1323,9 +1340,9 @@ ec_normalize_params(#'ECParameters'{} = ECParams) ->
 ec_normalize_params(Other) -> Other.
 
 -spec ec_curve_spec(ecpk_parameters_api()) -> term().
-ec_curve_spec( #'ECParameters'{fieldID = FieldId, curve = PCurve, base = Base, order = Order, cofactor = CoFactor }) ->
-    Field = {pubkey_cert_records:supportedCurvesTypes(FieldId#'FieldID'.fieldType),
-	     FieldId#'FieldID'.parameters},
+ec_curve_spec( #'ECParameters'{fieldID = #'FieldID'{fieldType = Type,
+                                                    parameters = Params}, curve = PCurve, base = Base, order = Order, cofactor = CoFactor }) ->
+    Field = format_field(pubkey_cert_records:supportedCurvesTypes(Type), Params),
     Curve = {PCurve#'Curve'.a, PCurve#'Curve'.b, none},
     {Field, Curve, Base, Order, CoFactor};
 ec_curve_spec({ecParameters, ECParams}) ->
@@ -1335,6 +1352,26 @@ ec_curve_spec({namedCurve, OID}) when is_tuple(OID), is_integer(element(1,OID))
 ec_curve_spec({namedCurve, Name}) when is_atom(Name) ->
     crypto:ec_curve(Name).
 
+format_field(characteristic_two_field = Type, Params0) ->
+    #'Characteristic-two'{
+       m = M,
+       basis = BasisOid,
+       parameters = Params} = der_decode('Characteristic-two', Params0),
+    {Type, M, field_param_decode(BasisOid, Params)};
+format_field(prime_field, Params0) ->
+    Prime = der_decode('Prime-p', Params0),
+    {prime_field, Prime}.
+
+field_param_decode(?'ppBasis', Params) ->
+    #'Pentanomial'{k1 = K1, k2 = K2, k3 = K3} =
+        der_decode('Pentanomial', Params),
+    {ppbasis, K1, K2, K3};
+field_param_decode(?'tpBasis', Params) ->
+    K = der_decode('Trinomial', Params),
+    {tpbasis, K};
+field_param_decode(?'gnBasis', _) ->
+    onbasis.
+        
 -spec ec_key({PubKey::term(), PrivateKey::term()}, Params::ecpk_parameters()) -> #'ECPrivateKey'{}.
 ec_key({PubKey, PrivateKey}, Params) ->
     #'ECPrivateKey'{version = 1,
@@ -1419,7 +1456,7 @@ ascii_to_lower(String) ->
 verify_hostname_extract_fqdn_default({dns_id,S}) ->
     S;
 verify_hostname_extract_fqdn_default({uri_id,URI}) ->
-    {ok,{https,_,Host,_,_,_}} = http_uri:parse(URI),
+    #{scheme := "https", host := Host} = uri_string:normalize(URI, [return_map]),
     Host.
 
 
diff --git a/lib/public_key/test/public_key_SUITE.erl b/lib/public_key/test/public_key_SUITE.erl
index 0100f0a912..449d1fc040 100644
--- a/lib/public_key/test/public_key_SUITE.erl
+++ b/lib/public_key/test/public_key_SUITE.erl
@@ -64,7 +64,9 @@ all() ->
 groups() -> 
     [{pem_decode_encode, [], [dsa_pem, rsa_pem, ec_pem, encrypted_pem,
 			      dh_pem, cert_pem, pkcs7_pem, pkcs10_pem, ec_pem2,
-                  ec_pem_encode_generated]},
+                              ec_pem_encode_generated,
+                              gen_ec_param_prime_field, gen_ec_param_char_2_field
+                             ]},
      {ssh_public_key_decode_encode, [],
       [ssh_rsa_public_key, ssh_dsa_public_key, ssh_ecdsa_public_key,
        ssh_rfc4716_rsa_comment, ssh_rfc4716_dsa_comment,
@@ -102,8 +104,15 @@ init_per_testcase(pkix_test_data_all_default, Config) ->
          [] ->
              {skip, missing_ecc_support};
          _ ->
-               init_common_per_testcase(Config)
+             init_common_per_testcase(Config)
      end;
+
+init_per_testcase(gen_ec_param_prime_field=TC, Config) ->
+    init_per_testcase_gen_ec_param(TC, secp521r1, Config);
+
+init_per_testcase(gen_ec_param_char_2_field=TC, Config) ->
+    init_per_testcase_gen_ec_param(TC, sect571r1, Config);
+
 init_per_testcase(TestCase, Config) ->
     case TestCase of
 	ssh_hostkey_fingerprint_md5_implicit -> init_fingerprint_testcase([md5], Config);
@@ -1020,8 +1029,6 @@ pkix_verify_hostname_subjAltName_IP(Config) ->
     true  =  public_key:pkix_verify_hostname(Cert, [{ip, {10,67,16,75}}]),
     false =  public_key:pkix_verify_hostname(Cert, [{ip, {1,2,3,4}}]),
     false =  public_key:pkix_verify_hostname(Cert, [{ip, {10,11,12,13}}]).
-        
-
 %%--------------------------------------------------------------------
 pkix_iso_rsa_oid() ->
  [{doc, "Test workaround for supporting certs that use ISO oids"
@@ -1207,6 +1214,19 @@ short_crl_issuer_hash(Config) when is_list(Config) ->
 
     CrlIssuerHash = public_key:short_name_hash(Issuer).
 
+%%--------------------------------------------------------------------
+gen_ec_param_prime_field() ->
+    [{doc, "Generate key with EC prime_field parameters"}].
+gen_ec_param_prime_field(Config) when is_list(Config) ->
+    Datadir = proplists:get_value(data_dir, Config),
+    do_gen_ec_param(filename:join(Datadir, "ec_key_param0.pem")).
+
+%%--------------------------------------------------------------------
+gen_ec_param_char_2_field() ->
+    [{doc, "Generate key with EC characteristic_two_field parameters"}].
+gen_ec_param_char_2_field(Config) when is_list(Config) ->
+    Datadir = proplists:get_value(data_dir, Config),
+    do_gen_ec_param(filename:join(Datadir, "ec_key_param1.pem")).
 
 %%--------------------------------------------------------------------
 %% Internal functions ------------------------------------------------
@@ -1279,6 +1299,43 @@ strip_superfluous_newlines(Bin) ->
     Str = string:strip(binary_to_list(Bin), right, 10),
     re:replace(Str,"\n\n","\n", [{return,list}, global]).
 
+do_gen_ec_param(File) ->    
+    {ok, KeyPem} = file:read_file(File),
+    Entries = public_key:pem_decode(KeyPem),
+    [ParamInfo] = [Entry || Entry={'EcpkParameters', _, not_encrypted} <- Entries],
+    {ecParameters, Params} = public_key:pem_entry_decode(ParamInfo),
+    Key = public_key:generate_key(Params),
+    case check_entry_type(Key, 'ECPrivateKey') of
+        true ->
+            ok;
+        false ->
+            ct:fail({key_gen_fail, File})
+    end.
+
+init_per_testcase_gen_ec_param(TC, Curve, Config) ->
+    case crypto:ec_curves() of
+        [] ->
+            {skip, missing_ec_support};
+        Curves ->
+            case lists:member(Curve, Curves)
+                andalso crypto_supported_curve(Curve, Curves)
+            of
+                true ->
+                    init_common_per_testcase(Config);
+                false ->
+                    {skip, {missing_ec_support, Curve}}
+            end
+    end.
+
+
+crypto_supported_curve(Curve, Curves) ->
+    try crypto:generate_key(ecdh, Curve) of
+        {error,_} -> false; % Just in case crypto is changed in the future...
+        _-> true
+    catch
+        _:_-> false
+    end.
+        
 incorrect_countryname_pkix_cert() ->
     <<48,130,5,186,48,130,4,162,160,3,2,1,2,2,7,7,250,61,63,6,140,137,48,13,6,9,42, 134,72,134,247,13,1,1,5,5,0,48,129,220,49,11,48,9,6,3,85,4,6,19,2,85,83,49, 16,48,14,6,3,85,4,8,19,7,65,114,105,122,111,110,97,49,19,48,17,6,3,85,4,7,19, 10,83,99,111,116,116,115,100,97,108,101,49,37,48,35,6,3,85,4,10,19,28,83,116, 97,114,102,105,101,108,100,32,84,101,99,104,110,111,108,111,103,105,101,115, 44,32,73,110,99,46,49,57,48,55,6,3,85,4,11,19,48,104,116,116,112,58,47,47,99, 101,114,116,105,102,105,99,97,116,101,115,46,115,116,97,114,102,105,101,108, 100,116,101,99,104,46,99,111,109,47,114,101,112,111,115,105,116,111,114,121, 49,49,48,47,6,3,85,4,3,19,40,83,116,97,114,102,105,101,108,100,32,83,101,99, 117,114,101,32,67,101,114,116,105,102,105,99,97,116,105,111,110,32,65,117, 116,104,111,114,105,116,121,49,17,48,15,6,3,85,4,5,19,8,49,48,54,56,56,52,51, 53,48,30,23,13,49,48,49,48,50,51,48,49,51,50,48,53,90,23,13,49,50,49,48,50, 51,48,49,51,50,48,53,90,48,122,49,11,48,9,6,3,85,4,6,12,2,85,83,49,11,48,9,6, 3,85,4,8,12,2,65,90,49,19,48,17,6,3,85,4,7,12,10,83,99,111,116,116,115,100, 97,108,101,49,38,48,36,6,3,85,4,10,12,29,83,112,101,99,105,97,108,32,68,111, 109,97,105,110,32,83,101,114,118,105,99,101,115,44,32,73,110,99,46,49,33,48, 31,6,3,85,4,3,12,24,42,46,108,111,103,105,110,46,115,101,99,117,114,101,115, 101,114,118,101,114,46,110,101,116,48,130,1,34,48,13,6,9,42,134,72,134,247, 13,1,1,1,5,0,3,130,1,15,0,48,130,1,10,2,130,1,1,0,185,136,240,80,141,36,124, 245,182,130,73,19,188,74,166,117,72,228,185,209,43,129,244,40,44,193,231,11, 209,12,234,88,43,142,1,162,48,122,17,95,230,105,171,131,12,147,46,204,36,80, 250,171,33,253,35,62,83,22,71,212,186,141,14,198,89,89,121,204,224,122,246, 127,110,188,229,162,67,95,6,74,231,127,99,131,7,240,85,102,203,251,50,58,58, 104,245,103,181,183,134,32,203,121,232,54,32,188,139,136,112,166,126,14,91, 223,153,172,164,14,61,38,163,208,215,186,210,136,213,143,70,147,173,109,217, 250,169,108,31,211,104,238,103,93,182,59,165,43,196,189,218,241,30,148,240, 109,90,69,176,194,52,116,173,151,135,239,10,209,179,129,192,102,75,11,25,168, 223,32,174,84,223,134,70,167,55,172,143,27,130,123,226,226,7,34,142,166,39, 48,246,96,231,150,84,220,106,133,193,55,95,159,227,24,249,64,36,1,142,171,16, 202,55,126,7,156,15,194,22,116,53,113,174,104,239,203,120,45,131,57,87,84, 163,184,27,83,57,199,91,200,34,43,98,61,180,144,76,65,170,177,2,3,1,0,1,163, 130,1,224,48,130,1,220,48,15,6,3,85,29,19,1,1,255,4,5,48,3,1,1,0,48,29,6,3, 85,29,37,4,22,48,20,6,8,43,6,1,5,5,7,3,1,6,8,43,6,1,5,5,7,3,2,48,14,6,3,85, 29,15,1,1,255,4,4,3,2,5,160,48,56,6,3,85,29,31,4,49,48,47,48,45,160,43,160, 41,134,39,104,116,116,112,58,47,47,99,114,108,46,115,116,97,114,102,105,101, 108,100,116,101,99,104,46,99,111,109,47,115,102,115,50,45,48,46,99,114,108, 48,83,6,3,85,29,32,4,76,48,74,48,72,6,11,96,134,72,1,134,253,110,1,7,23,2,48, 57,48,55,6,8,43,6,1,5,5,7,2,1,22,43,104,116,116,112,115,58,47,47,99,101,114, 116,115,46,115,116,97,114,102,105,101,108,100,116,101,99,104,46,99,111,109, 47,114,101,112,111,115,105,116,111,114,121,47,48,129,141,6,8,43,6,1,5,5,7,1, 1,4,129,128,48,126,48,42,6,8,43,6,1,5,5,7,48,1,134,30,104,116,116,112,58,47, 47,111,99,115,112,46,115,116,97,114,102,105,101,108,100,116,101,99,104,46,99, 111,109,47,48,80,6,8,43,6,1,5,5,7,48,2,134,68,104,116,116,112,58,47,47,99, 101,114,116,105,102,105,99,97,116,101,115,46,115,116,97,114,102,105,101,108, 100,116,101,99,104,46,99,111,109,47,114,101,112,111,115,105,116,111,114,121, 47,115,102,95,105,110,116,101,114,109,101,100,105,97,116,101,46,99,114,116, 48,31,6,3,85,29,35,4,24,48,22,128,20,73,75,82,39,209,27,188,242,161,33,106, 98,123,81,66,122,138,215,213,86,48,59,6,3,85,29,17,4,52,48,50,130,24,42,46, 108,111,103,105,110,46,115,101,99,117,114,101,115,101,114,118,101,114,46,110, 101,116,130,22,108,111,103,105,110,46,115,101,99,117,114,101,115,101,114,118, 101,114,46,110,101,116,48,29,6,3,85,29,14,4,22,4,20,138,233,191,208,157,203, 249,85,242,239,20,195,48,10,148,49,144,101,255,116,48,13,6,9,42,134,72,134, 247,13,1,1,5,5,0,3,130,1,1,0,82,31,121,162,49,50,143,26,167,202,143,61,71, 189,201,199,57,81,122,116,90,192,88,24,102,194,174,48,157,74,27,87,210,223, 253,93,3,91,150,109,120,1,110,27,11,200,198,141,222,246,14,200,71,105,41,138, 13,114,122,106,63,17,197,181,234,121,61,89,74,65,41,231,248,219,129,83,176, 219,55,107,55,211,112,98,38,49,69,77,96,221,108,123,152,12,210,159,157,141, 43,226,55,187,129,3,82,49,136,66,81,196,91,234,196,10,82,48,6,80,163,83,71, 127,102,177,93,209,129,26,104,2,84,24,255,248,161,3,244,169,234,92,122,110, 43,4,17,113,185,235,108,219,210,236,132,216,177,227,17,169,58,162,159,182, 162,93,160,229,200,9,163,229,110,121,240,168,232,14,91,214,188,196,109,210, 164,222,0,109,139,132,113,91,16,118,173,178,176,80,132,34,41,199,51,206,250, 224,132,60,115,192,94,107,163,219,212,226,225,65,169,148,108,213,46,174,173, 103,110,189,229,166,149,254,31,51,44,144,108,187,182,11,251,201,206,86,138, 208,59,51,86,132,235,81,225,88,34,190,8,184>>.
 
diff --git a/lib/public_key/test/public_key_SUITE_data/ec_key_param0.pem b/lib/public_key/test/public_key_SUITE_data/ec_key_param0.pem
new file mode 100644
index 0000000000..679b08f1a2
--- /dev/null
+++ b/lib/public_key/test/public_key_SUITE_data/ec_key_param0.pem
@@ -0,0 +1,28 @@
+-----BEGIN EC PARAMETERS-----
+MIIBwgIBATBNBgcqhkjOPQEBAkIB////////////////////////////////////
+//////////////////////////////////////////////////8wgZ4EQgH/////
+////////////////////////////////////////////////////////////////
+/////////////////ARBUZU+uWGOHJofkpohoLaFQO6i2nJbmbMV87i0iZGO8Qnh
+Vhk5Uex+k3sWUsC9O7G/BzVz34g9LDTx70Uf1GtQPwADFQDQnogAKRy4U5bMZxc5
+MoSqoNpkugSBhQQAxoWOBrcEBOnNnj7LZiOVtEKcZIE5BT+1Ifgor2BrTT26oUte
+d+/nWSj+HcEnov+o3jNIs8GFakKb+X5+McLlvWYBGDkpaniaO8AEXIpftCx9G9mY
+9URJV5tEaBevvRcnPmYsl+5ymV70JkDFULkBP60HYTU8cIaicsJAiL6Udp/RZlAC
+QgH///////////////////////////////////////////pRhoeDvy+Wa3/MAUj3
+CaXQO7XJuImcR667b7cekThkCQIBAQ==
+-----END EC PARAMETERS-----
+-----BEGIN EC PRIVATE KEY-----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-----END EC PRIVATE KEY-----
diff --git a/lib/public_key/test/public_key_SUITE_data/ec_key_param1.pem b/lib/public_key/test/public_key_SUITE_data/ec_key_param1.pem
new file mode 100644
index 0000000000..67095d8dc5
--- /dev/null
+++ b/lib/public_key/test/public_key_SUITE_data/ec_key_param1.pem
@@ -0,0 +1,25 @@
+-----BEGIN EC PARAMETERS-----
+MIIBcQIBATAlBgcqhkjOPQECMBoCAgI7BgkqhkjOPQECAwMwCQIBAgIBBQIBCjBk
+BAEBBEgC9A5+IiHyld4pcRe389YvXGqX/8uM7/HNa6jOSpoYrYT/q72O+lkzK+et
+Z1ambilK/RhaeP8SqlIOTec5usoMf/7/fylVcnoDFQAqoFj3Og4zq0hrD2EEEMU6
+fxMjEASBkQQDAwAdNLhWKWwWwNQNPNd1CpPR0pVfqAql9A/I23sqvb3lOVD0wNKT
+zdcRo1tn+xSZrmADhhTxOUq/o7TIUNkn4ed2nI7sLRkDe/JzQtpjm23M//63PWnX
+jGwnpgCcu8oZgPhTOSHopoRCPkO6sIpXYpGvj0YbsqizUx0vBIXBmxbi8VFuI908
+GkgnrxuKwVsCSAP//////////////////////////////////////////////+Zh
+zhj/VZhzCAWbGGgjhR7H3ZyhFh3pPVF01m6Dgum7L+hORwIBAg==
+-----END EC PARAMETERS-----
+-----BEGIN EC PRIVATE KEY-----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+-----END EC PRIVATE KEY-----
diff --git a/lib/public_key/vsn.mk b/lib/public_key/vsn.mk
index bb96c2237d..99a0cc087e 100644
--- a/lib/public_key/vsn.mk
+++ b/lib/public_key/vsn.mk
@@ -1 +1 @@
-PUBLIC_KEY_VSN = 1.5
+PUBLIC_KEY_VSN = 1.5.2
diff --git a/lib/reltool/doc/src/reltool_examples.xml b/lib/reltool/doc/src/reltool_examples.xml
index 30cb3c13b6..2a103119e6 100644
--- a/lib/reltool/doc/src/reltool_examples.xml
+++ b/lib/reltool/doc/src/reltool_examples.xml
@@ -5,7 +5,7 @@
   <header>
     <copyright>
       <year>2009</year>
-      <year>2017</year>
+      <year>2018</year>
       <holder>Ericsson AB, All Rights Reserved</holder>
     </copyright>
     <legalnotice>
@@ -150,13 +150,13 @@ Eshell V9.0  (abort with ^G)
           {mod_cond,all},
           {incl_cond,derived},
           {erts,[{app,erts,
-                      [{vsn,"9.0"},
-                       {lib_dir,"/usr/local/lib/erlang/lib/erts-9.0"},
+                      [{vsn,"10.0"},
+                       {lib_dir,"/usr/local/lib/erlang/lib/erts-10.0"},
                        {mod,erl_prim_loader,[]},
                        {mod,erl_tracer,[]},
                        {mod,erlang,[]},
                        {mod,erts_code_purger,[]},
-                       {mod,erts_dirty_process_code_checker,[]},
+                       {mod,erts_dirty_process_signal_handler,[]},
                        {mod,erts_internal,[]},
                        {mod,erts_literal_area_collector,[]},
                        {mod,init,[]},
@@ -309,9 +309,9 @@ Eshell V9.0  (abort with ^G)
   <section>
     <title>Generate release and script files</title>
     <pre>
-Erlang/OTP 20 [erts-9.0] [source-c13b302] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10]
+Erlang/OTP 20 [erts-10.0] [source-c13b302] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10]
 [hipe] [kernel-poll:false]
-Eshell V9.0  (abort with ^G)
+Eshell V10.0  (abort with ^G)
 1&gt;
 1&gt; {ok, Server} = reltool:start_server([{config, {sys, [{boot_rel, "NAME"},
                                                         {rel, "NAME", "VSN",
@@ -324,13 +324,13 @@ Eshell V9.0  (abort with ^G)
 3&gt;
 3&gt; reltool:get_rel(Server, "NAME").
 {ok,{release,{"NAME","VSN"},
-             {erts,"9.0"},
+             {erts,"10.0"},
              [{kernel,"5.2"},{stdlib,"3.3"},{sasl,"3.0.3"}]}}
 4&gt;
 4&gt; reltool:get_script(Server, "NAME").
 {ok,{script,{"NAME","VSN"},
             [{preLoaded,[erl_prim_loader,erl_tracer,erlang,
-                         erts_code_purger,erts_dirty_process_code_checker,
+                         erts_code_purger,erts_dirty_process_signal_handler,
                          erts_internal,erts_literal_area_collector,init,otp_ring0,
                          prim_eval,prim_file,prim_inet,prim_zip,zlib]},
              {progress,preloaded},
@@ -374,9 +374,9 @@ ok
   <section>
     <title>Create a target system</title>
     <pre>
-Erlang/OTP 20 [erts-9.0] [source-c13b302] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10]
+Erlang/OTP 20 [erts-10.0] [source-c13b302] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10]
 [hipe] [kernel-poll:false]
-Eshell V9.0  (abort with ^G)
+Eshell V10.0  (abort with ^G)
 1&gt;
 1&gt; Config = {sys, [{escript, "examples/display_args", [{incl_cond, include}]},
 		   {app, inets, [{incl_cond, include}]},
@@ -393,7 +393,7 @@ Eshell V9.0  (abort with ^G)
 2&gt;
 2&gt; {ok, Spec} = reltool:get_target_spec([Config]).
 {ok,[{create_dir,"releases",
-         [{write_file,"start_erl.data","9.0 1.0\n"},
+         [{write_file,"start_erl.data","10.0 1.0\n"},
           {create_dir,"1.0",
               [{write_file,"start_clean.rel",
                    [37,37,32,114,101,108,32,103,101,110,101,114,97,116|...]},
@@ -410,17 +410,17 @@ Eshell V9.0  (abort with ^G)
      {create_dir,"bin",
          [{copy_file,"display_args.escript",
               "/usr/local/lib/erlang/lib/reltool-0.7.3/examples/display_args"},
-          {copy_file,"display_args","erts-9.0/bin/escript"},
-          {copy_file,"start","erts-9.0/bin/start"},
-          {copy_file,"ct_run","erts-9.0/bin/ct_run"},
-          {copy_file,"dialyzer","erts-9.0/bin/dialyzer"},
-          {copy_file,"run_erl","erts-9.0/bin/run_erl"},
-          {copy_file,"erl","erts-9.0/bin/dyn_erl"},
-          {copy_file,"to_erl","erts-9.0/bin/to_erl"},
-          {copy_file,"epmd","erts-9.0/bin/epmd"},
-          {copy_file,"erlc","erts-9.0/bin/erlc"},
-          {copy_file,"typer","erts-9.0/bin/typer"},
-          {copy_file,"escript","erts-9.0/bin/escript"},
+          {copy_file,"display_args","erts-10.0/bin/escript"},
+          {copy_file,"start","erts-10.0/bin/start"},
+          {copy_file,"ct_run","erts-10.0/bin/ct_run"},
+          {copy_file,"dialyzer","erts-10.0/bin/dialyzer"},
+          {copy_file,"run_erl","erts-10.0/bin/run_erl"},
+          {copy_file,"erl","erts-10.0/bin/dyn_erl"},
+          {copy_file,"to_erl","erts-10.0/bin/to_erl"},
+          {copy_file,"epmd","erts-10.0/bin/epmd"},
+          {copy_file,"erlc","erts-10.0/bin/erlc"},
+          {copy_file,"typer","erts-10.0/bin/typer"},
+          {copy_file,"escript","erts-10.0/bin/escript"},
           {write_file,"start_clean.boot",&lt;&lt;131,104,3,119,6,115,...&gt;&gt;},
           {write_file,"start_sasl.boot",&lt;&lt;131,104,3,119,6,...&gt;&gt;},
           {write_file,"start.boot",&lt;&lt;131,104,3,119,...&gt;&gt;}]},
@@ -451,7 +451,7 @@ Eshell V9.0  (abort with ^G)
                {copy_file,[...]},
                {copy_file,...},
                {...}]}]},
-     {create_dir,"erts-9.0",
+     {create_dir,"erts-10.0",
          [{create_dir,"bin",
               [{copy_file,"start"},
                {copy_file,"ct_run"},
@@ -459,7 +459,7 @@ Eshell V9.0  (abort with ^G)
                {copy_file,"dialyzer"},
                {copy_file,"beam.smp"},
                {copy_file,"run_erl"},
-               {copy_file,"erl","erts-9.0/bin/dyn_erl"},
+               {copy_file,"erl","erts-10.0/bin/dyn_erl"},
                {copy_file,"to_erl"},
                {copy_file,"epmd"},
                {copy_file,"erl_child_setup"},
@@ -511,8 +511,8 @@ Eshell V9.0  (abort with ^G)
               [{create_dir,"priv",
                    [{create_dir,"lib",[{copy_file,[...]},{copy_file,...}]},
                     {create_dir,"obj",[{copy_file,...},{...}|...]}]}]},
-          {archive,"erts-9.0.ez",[],
-              [{create_dir,"erts-9.0",
+          {archive,"erts-10.0.ez",[],
+              [{create_dir,"erts-10.0",
                    [{create_dir,"src",[{...}|...]},
                     {create_dir,"ebin",[...]}]}]},
           {archive,"hipe-3.15.4.ez",[],
@@ -549,14 +549,14 @@ ok
 ok
 7&gt;
 7&gt; file:list_dir(TargetDir).
-{ok,["bin","Install","lib","misc","usr","erts-9.0",
+{ok,["bin","Install","lib","misc","usr","erts-10.0",
      "releases"]}
 8&gt;
 8&gt; file:list_dir(filename:join([TargetDir,"lib"])).
 {ok,["tools-2.9.1.ez","kernel-5.2.ez","inets-6.3.9.ez",
      "kernel-5.2","sasl-3.0.3.ez","hipe-3.15.4.ez","inets-6.3.9",
      "crypto-3.7.4","crypto-3.7.4.ez","stdlib-3.3.ez",
-     "erts-9.0.ez","stdlib-3.3","compiler-7.0.4.ez"]}
+     "erts-10.0.ez","stdlib-3.3","compiler-7.0.4.ez"]}
 9&gt;
 9&gt; file:make_dir("/tmp/yet_another_target_dir").
 ok
@@ -565,7 +565,7 @@ ok
 ok
 11&gt;
 11&gt; file:list_dir("/tmp/yet_another_target_dir").
-{ok,["bin","Install","lib","misc","usr","erts-9.0",
+{ok,["bin","Install","lib","misc","usr","erts-10.0",
      "releases"]}
     </pre>
 
diff --git a/lib/reltool/src/reltool_app_win.erl b/lib/reltool/src/reltool_app_win.erl
index 663144861f..335b40fa74 100644
--- a/lib/reltool/src/reltool_app_win.erl
+++ b/lib/reltool/src/reltool_app_win.erl
@@ -102,8 +102,8 @@ init(Parent, WxEnv, Xref, C, AppName) ->
     try
 	do_init(Parent, WxEnv, Xref, C, AppName)
     catch
-	error:Reason ->
-	    exit({Reason, erlang:get_stacktrace()})
+	error:Reason:Stacktrace ->
+	    exit({Reason, Stacktrace})
     end.
 
 do_init(Parent, WxEnv, Xref, C, AppName) ->
diff --git a/lib/reltool/src/reltool_mod_win.erl b/lib/reltool/src/reltool_mod_win.erl
index dcd802a5de..8272d864c2 100644
--- a/lib/reltool/src/reltool_mod_win.erl
+++ b/lib/reltool/src/reltool_mod_win.erl
@@ -107,8 +107,8 @@ init(Parent, WxEnv, Xref, RelPid, C, ModName) ->
     try
 	do_init(Parent, WxEnv, Xref, RelPid, C, ModName)
     catch
-	error:Reason ->
-	    exit({Reason, erlang:get_stacktrace()})
+	error:Reason:Stacktrace ->
+	    exit({Reason, Stacktrace})
     end.
 
 do_init(Parent, WxEnv, Xref, RelPid, C, ModName) ->
diff --git a/lib/reltool/src/reltool_server.erl b/lib/reltool/src/reltool_server.erl
index 853191c696..66ee1a3742 100644
--- a/lib/reltool/src/reltool_server.erl
+++ b/lib/reltool/src/reltool_server.erl
@@ -135,8 +135,8 @@ init([{parent,Parent}|_] = Options) ->
     catch
 	throw:{error,Reason} ->
 	    proc_lib:init_ack(Parent,{error,Reason});
-        error:Reason ->
-            exit({Reason, erlang:get_stacktrace()})
+        error:Reason:Stacktrace ->
+            exit({Reason, Stacktrace})
     end.
 
 do_init(Options) ->
diff --git a/lib/reltool/src/reltool_sys_win.erl b/lib/reltool/src/reltool_sys_win.erl
index 92df270752..d87b1dc91f 100644
--- a/lib/reltool/src/reltool_sys_win.erl
+++ b/lib/reltool/src/reltool_sys_win.erl
@@ -135,9 +135,9 @@ init(Options) ->
     try
 	do_init(Options)
     catch
-	error:Reason ->
-	    io:format("~tp: ~tp~n",[Reason, erlang:get_stacktrace()]),
-	    exit({Reason, erlang:get_stacktrace()})
+	error:Reason:Stacktrace ->
+	    io:format("~tp: ~tp~n",[Reason, Stacktrace]),
+	    exit({Reason, Stacktrace})
     end.
 
 do_init([{safe_config, Safe}, {parent, Parent} | Options]) ->
diff --git a/lib/runtime_tools/doc/src/LTTng.xml b/lib/runtime_tools/doc/src/LTTng.xml
index 392d54857c..93937b3fdc 100644
--- a/lib/runtime_tools/doc/src/LTTng.xml
+++ b/lib/runtime_tools/doc/src/LTTng.xml
@@ -134,7 +134,7 @@ $ make </code>
         <p><em>port_open</em></p>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
         </list>
         <p>
@@ -323,7 +323,7 @@ $ make </code>
 
         <p><em>driver_init</em></p>
         <list type="bulleted">
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
             <item><c>major : integer</c> :: Major version. Ex. <c>3</c></item>
             <item><c>minor : integer</c> :: Minor version. Ex. <c>1</c></item>
             <item><c>flags : integer</c> :: Flags. Ex. <c>1</c></item>
@@ -334,7 +334,7 @@ $ make </code>
         <p><em>driver_start</em></p>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
         </list>
         <p>Example:</p>
@@ -344,7 +344,7 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
             <item><c>bytes : integer</c> :: Size of data returned. Ex. <c>82</c></item>
         </list>
         <p>Example:</p>
@@ -354,7 +354,7 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
             <item><c>bytes : integer</c> :: Size of data returned. Ex. <c>82</c></item>
         </list>
         <p>Example:</p>
@@ -364,7 +364,7 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
         <p>Example:</p>
         <code type="none">driver_ready_input: { cpu_id = 5 }, { pid = "&lt;0.189.0&gt;", port = "#Port&lt;0.3637&gt;", driver = "inet_gethost 4 " }</code>
@@ -373,7 +373,7 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
         <p>Example:</p>
         <code type="none">driver_ready_output: { cpu_id = 5 }, { pid = "&lt;0.194.0&gt;", port = "#Port&lt;0.3663&gt;", driver = "tcp_inet" }</code>
@@ -382,14 +382,14 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
         <p>Example:</p>
         <code type="none">driver_timeout: { cpu_id = 5 }, { pid = "&lt;0.196.0&gt;", port = "#Port&lt;0.3664&gt;", driver = "tcp_inet" }</code>
 
         <p><em>driver_stop_select</em></p>
         <list type="bulleted">
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
         <p>Example:</p>
         <code type="none">driver_stop_select: { cpu_id = 5 }, { driver = "unknown" }</code>
@@ -398,7 +398,7 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
         <p>Example:</p>
         <code type="none">driver_flush: { cpu_id = 7 }, { pid = "&lt;0.204.0&gt;", port = "#Port&lt;0.3686&gt;", driver = "tcp_inet" }</code>
@@ -407,32 +407,32 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
         <p>Example:</p>
-        <code type="none">driver_stop: { cpu_id = 5 }, { pid = "[]", port = "#Port&lt;0.3673&gt;", driver = "efile" }</code>
+        <code type="none">driver_stop: { cpu_id = 5 }, { pid = "[]", port = "#Port&lt;0.3673&gt;", driver = "tcp_inet" }</code>
 
         <p><em>driver_process_exit</em></p>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
 
         <p><em>driver_ready_async</em></p>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
         </list>
         <p>Example:</p>
-        <code type="none">driver_ready_async: { cpu_id = 3 }, { pid = "&lt;0.181.0&gt;", port = "#Port&lt;0.3622&gt;", driver = "efile" }</code>
+        <code type="none">driver_ready_async: { cpu_id = 3 }, { pid = "&lt;0.181.0&gt;", port = "#Port&lt;0.3622&gt;", driver = "tcp_inet" }</code>
 
         <p><em>driver_call</em></p>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
             <item><c>command : integer</c> :: Command integer. Ex. <c>1</c></item>
             <item><c>bytes : integer</c> :: Size of data returned. Ex. <c>82</c></item>
         </list>
@@ -443,7 +443,7 @@ $ make </code>
         <list type="bulleted">
             <item><c>pid : string</c> :: Process ID. Ex. <c>"&lt;0.131.0&gt;"</c></item>
             <item><c>port : string</c> :: Port ID. Ex. <c>"#Port&lt;0.1031&gt;"</c></item>
-            <item><c>driver : string</c> :: Driver name. Ex. <c>"efile"</c></item>
+            <item><c>driver : string</c> :: Driver name. Ex. <c>"tcp_inet"</c></item>
             <item><c>command : integer</c> :: Command integer. Ex. <c>1</c></item>
             <item><c>bytes : integer</c> :: Size of data returned. Ex. <c>82</c></item>
         </list>
diff --git a/lib/runtime_tools/doc/src/Makefile b/lib/runtime_tools/doc/src/Makefile
index dad229e193..a9b0056a93 100644
--- a/lib/runtime_tools/doc/src/Makefile
+++ b/lib/runtime_tools/doc/src/Makefile
@@ -41,11 +41,17 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN)
 # Target Specs
 # ----------------------------------------------------
 XML_APPLICATION_FILES = ref_man.xml
-XML_REF3_FILES = dbg.xml dyntrace.xml erts_alloc_config.xml system_information.xml msacc.xml
+XML_REF3_FILES = \
+	dbg.xml \
+	dyntrace.xml \
+	erts_alloc_config.xml \
+	system_information.xml \
+	msacc.xml \
+	scheduler.xml
 XML_REF6_FILES = runtime_tools_app.xml
 
 XML_PART_FILES = part.xml
-XML_CHAPTER_FILES = notes.xml notes_history.xml LTTng.xml
+XML_CHAPTER_FILES = notes.xml LTTng.xml
 
 GENERATED_XML_FILES = DTRACE.xml SYSTEMTAP.xml
 
@@ -54,7 +60,8 @@ BOOK_FILES = book.xml
 XML_FILES = \
 	$(BOOK_FILES) $(XML_CHAPTER_FILES) \
 	$(XML_PART_FILES) $(XML_REF3_FILES) \
-	$(XML_REF6_FILES) $(XML_APPLICATION_FILES)
+	$(XML_REF6_FILES) $(XML_APPLICATION_FILES) \
+	$(GENERATED_XML_FILES)
 
 GIF_FILES =
 
@@ -89,7 +96,6 @@ SPECS_FLAGS = -I../../include -I../../../kernel/src
 # ----------------------------------------------------
 # Targets
 # ----------------------------------------------------
-$(XML_FILES): $(GENERATED_XML_FILES)
 
 %.xml: $(ERL_TOP)/HOWTO/%.md $(ERL_TOP)/make/emd2exml
 	$(ERL_TOP)/make/emd2exml $< $@
diff --git a/lib/runtime_tools/doc/src/dbg.xml b/lib/runtime_tools/doc/src/dbg.xml
index 95f74d4607..276a41c415 100644
--- a/lib/runtime_tools/doc/src/dbg.xml
+++ b/lib/runtime_tools/doc/src/dbg.xml
@@ -815,7 +815,7 @@ Error: fun containing local erlang function calls ('is_atomm' called in guard)\
         <v>HandlerSpec = {HandlerFun, InitialData}</v>
         <v>HandlerFun = fun() (two arguments)</v>
         <v>ModuleSpec = fun() (no arguments) | {TracerModule, TracerState}</v>
-        <v>ModuleModule = atom()</v>
+        <v>TracerModule = atom()</v>
         <v>InitialData = TracerState = term()</v>
       </type>
       <desc>
diff --git a/lib/runtime_tools/doc/src/notes.xml b/lib/runtime_tools/doc/src/notes.xml
index 8b4d437c26..355e3dd40d 100644
--- a/lib/runtime_tools/doc/src/notes.xml
+++ b/lib/runtime_tools/doc/src/notes.xml
@@ -32,6 +32,53 @@
   <p>This document describes the changes made to the Runtime_Tools
     application.</p>
 
+<section><title>Runtime_Tools 1.12.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p><c>system_information:to_file/1</c> will now use
+	    slightly less memory.</p>
+          <p>
+	    Own Id: OTP-14816</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Runtime_Tools 1.12.4</title>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    New family of <c>erts_alloc</c> strategies: Age Order
+	    First Fit. Similar to "address order", but instead the
+	    oldest possible carrier is always chosen for allocation.</p>
+          <p>
+	    Own Id: OTP-14917 Aux Id: ERIERL-88 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Runtime_Tools 1.12.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Runtime_Tools 1.12.2</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/runtime_tools/doc/src/ref_man.xml b/lib/runtime_tools/doc/src/ref_man.xml
index d2fb7a29af..eb3a6f0f5c 100644
--- a/lib/runtime_tools/doc/src/ref_man.xml
+++ b/lib/runtime_tools/doc/src/ref_man.xml
@@ -37,6 +37,7 @@
   <xi:include href="dyntrace.xml"/>
   <xi:include href="erts_alloc_config.xml"/>
   <xi:include href="msacc.xml"/>
+  <xi:include href="scheduler.xml"/>
   <xi:include href="system_information.xml"/>
 </application>
 
diff --git a/lib/runtime_tools/doc/src/scheduler.xml b/lib/runtime_tools/doc/src/scheduler.xml
new file mode 100644
index 0000000000..dd8bf73bae
--- /dev/null
+++ b/lib/runtime_tools/doc/src/scheduler.xml
@@ -0,0 +1,135 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE erlref SYSTEM "erlref.dtd">
+
+<erlref>
+  <header>
+    <copyright>
+      <year>2018</year>
+      <holder>Ericsson AB. All Rights Reserved.</holder>
+    </copyright>
+    <legalnotice>
+      Licensed under the Apache License, Version 2.0 (the "License");
+      you may not use this file except in compliance with the License.
+      You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+      Unless required by applicable law or agreed to in writing, software
+      distributed under the License is distributed on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+      See the License for the specific language governing permissions and
+      limitations under the License.
+
+    </legalnotice>
+
+    <title></title>
+    <prepared></prepared>
+    <responsible></responsible>
+    <docno>1</docno>
+    <approved></approved>
+    <checked></checked>
+    <date></date>
+    <rev></rev>
+    <file>scheduler.xml</file>
+  </header>
+  <module>scheduler</module>
+  <modulesummary>Measure scheduler utilization</modulesummary>
+  <description>
+    <p>This module contains utility functions for easier measurement and
+    calculation of scheduler utilization, otherwise obtained from calling the
+    more primitive <seealso marker="erts:erlang#statistics_scheduler_wall_time">
+    <c>statistics(scheduler_wall_time)</c></seealso>.</p>
+    <p>The simplest usage is to call <seealso marker="#utilization-1">
+    <c>scheduler:utilization(Seconds)</c></seealso>.</p>
+  </description>
+
+  <datatypes>
+    <datatype>
+      <name name="sched_sample"/>
+    </datatype>
+    <datatype>
+      <name name="sched_type"/>
+    </datatype>
+    <datatype>
+      <name name="sched_id"/>
+    </datatype>
+    <datatype>
+      <name name="sched_util_result"/>
+      <desc>
+	<p>A list of tuples containing results for individual schedulers
+	as well as aggregated averages. <c>Util</c> is the scheduler utilization
+	as a floating point value between 0.0 and 1.0. <c>Percent</c> is the
+	same utilization as a more human readable string expressed in percent.</p>
+	<taglist>
+	  <tag><c>{normal, SchedulerId, Util, Percent}</c></tag>
+	  <item>Scheduler utilization of a normal scheduler with number
+	    <c>SchedulerId</c>.</item>
+	  <tag><c>{cpu, SchedulerId, Util, Percent}</c></tag>
+	  <item>Scheduler utilization of a dirty-cpu scheduler with number
+	    <c>SchedulerId</c>.</item>
+	  <tag><c>{io, SchedulerId, Util, Percent}</c></tag>
+	  <item>Scheduler utilization of a dirty-io scheduler with number
+	    <c>SchedulerId</c>. This tuple will only exist if both samples were
+	    taken with <seealso marker="#sample_all-0"><c>sample_all/0</c></seealso>.</item>
+	  <tag><c>{total, Util, Percent}</c></tag>
+	  <item>Total utilization of all normal and dirty-cpu schedulers.</item>
+	  <tag><c>{weighted, Util, Percent}</c></tag>
+	  <item>Total utilization of all normal and dirty-cpu schedulers,
+	  weighted against maximum amount of available CPU time.</item>
+	</taglist>
+      </desc>
+    </datatype>
+  </datatypes>
+
+  <funcs>
+
+    <func>
+      <name name="sample" arity="0"/>
+      <fsummary>Get scheduler utilization sample.</fsummary>
+      <desc>
+        <p>Return a scheduler utilization sample for normal and dirty-cpu
+	schedulers.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="sample_all" arity="0"/>
+      <fsummary>Get scheduler utilization sample.</fsummary>
+      <desc>
+        <p>Return a scheduler utilization sample for all schedulers,
+	including dirty-io schedulers.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="utilization" arity="1" clause_i="1"/>
+      <fsummary>Measure scheduler utilizations during a period of time.</fsummary>
+      <desc>
+        <p>Measure utilization for normal and dirty-cpu schedulers during
+	<c><anno>Seconds</anno></c> seconds, and then return the result.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="utilization" arity="1" clause_i="2"/>
+      <fsummary>Measure scheduler utilizations since sample.</fsummary>
+      <desc>
+        <p>Calculate scheduler utilizations for the time interval from when
+	<c><anno>Sample</anno></c> was taken and "now". The same as calling
+	<c>scheduler:utilization(Sample, scheduler:sample_all())</c>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="utilization" arity="2"/>
+      <fsummary>Measure scheduler utilizations between two samples.</fsummary>
+      <desc>
+	<p>Calculates scheduler utilizations for the time interval between
+	the two samples obtained from calling
+	<seealso marker="#sample-0"><c>sample/0</c></seealso> or
+	<seealso marker="#sample_all-0"><c>sample_all/0</c></seealso>.</p>
+      </desc>
+    </func>
+
+  </funcs>
+ </erlref>
diff --git a/lib/runtime_tools/doc/src/specs.xml b/lib/runtime_tools/doc/src/specs.xml
index 978bd39e55..33fe7fa370 100644
--- a/lib/runtime_tools/doc/src/specs.xml
+++ b/lib/runtime_tools/doc/src/specs.xml
@@ -2,4 +2,5 @@
 <specs xmlns:xi="http://www.w3.org/2001/XInclude">
   <xi:include href="../specs/specs_system_information.xml"/>
   <xi:include href="../specs/specs_msacc.xml"/>
+  <xi:include href="../specs/specs_scheduler.xml"/>
 </specs>
diff --git a/lib/runtime_tools/examples/efile_drv.d b/lib/runtime_tools/examples/efile_drv.d
deleted file mode 100644
index a470518dd9..0000000000
--- a/lib/runtime_tools/examples/efile_drv.d
+++ /dev/null
@@ -1,105 +0,0 @@
-/* example usage: dtrace -q -s /path/to/efile_drv.d */
-/*
- * %CopyrightBegin%
- *
- * Copyright Scott Lystig Fritchie 2011-2016. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * %CopyrightEnd%
- */
-
-BEGIN
-{
-    op_map[1] = "OPEN";
-    op_map[2] = "READ";
-    op_map[3] = "LSEEK";
-    op_map[4] = "WRITE";
-    op_map[5] = "FSTAT";
-    op_map[6] = "PWD";
-    op_map[7] = "READDIR";
-    op_map[8] = "CHDIR";
-    op_map[9] = "FSYNC";
-    op_map[10] = "MKDIR";
-    op_map[11] = "DELETE";
-    op_map[12] = "RENAME";
-    op_map[13] = "RMDIR";
-    op_map[14] = "TRUNCATE";
-    op_map[15] = "READ_FILE";
-    op_map[16] = "WRITE_INFO";
-    op_map[19] = "LSTAT";
-    op_map[20] = "READLINK";
-    op_map[21] = "LINK";
-    op_map[22] = "SYMLINK";
-    op_map[23] = "CLOSE";
-    op_map[24] = "PWRITEV";
-    op_map[25] = "PREADV";
-    op_map[26] = "SETOPT";
-    op_map[27] = "IPREAD";
-    op_map[28] = "ALTNAME";
-    op_map[29] = "READ_LINE";
-    op_map[30] = "FDATASYNC";
-    op_map[31] = "FADVISE";
-}
-
-erlang*:::aio_pool-add
-{
-    printf("async I/O pool port %s queue len %d\n", copyinstr(arg0), arg1);
-}
-
-erlang*:::aio_pool-get
-{
-    printf("async I/O pool port %s queue len %d\n", copyinstr(arg0), arg1);
-}
-
-erlang*:::efile_drv-entry
-{
-    printf("efile_drv enter tag={%d,%d} %s%s | %s (%d) | args: %s %s , %d %d (port %s)\n",
-	   arg0, arg1,
-           arg2 == NULL ? "" : "user tag ",
-           arg2 == NULL ? "" : copyinstr(arg2),
-           op_map[arg3], arg3,
-	   arg4 == NULL ? "" : copyinstr(arg4),
-	   arg5 == NULL ? "" : copyinstr(arg5), arg6, arg7,
-           /* NOTE: port name in args[10] is experimental */
-           (args[10] == NULL) ? 
-	       "?" : copyinstr((user_addr_t) args[10]));
-}
-
-erlang*:::efile_drv-int*
-{
-    printf("async I/O worker tag={%d,%d} | %s (%d) | %s\n",
-           arg0, arg1, op_map[arg2], arg2, probename);
-}
-
-/* efile_drv-return error case */
-erlang*:::efile_drv-return
-/arg4 == 0/
-{
-    printf("efile_drv return tag={%d,%d} %s%s | %s (%d) | errno %d\n",
-           arg0, arg1,
-           arg2 == NULL ? "" : "user tag ",
-           arg2 == NULL ? "" : copyinstr(arg2),
-           op_map[arg3], arg3,
-           arg5);
-}
-
-/* efile_drv-return success case */
-erlang*:::efile_drv-return
-/arg4 != 0/
-{
-    printf("efile_drv return tag={%d,%d} %s | %s (%d) ok\n",
-           arg0, arg1,
-           arg2 == NULL ? "" : copyinstr(arg2),
-           op_map[arg3], arg3);
-}
diff --git a/lib/runtime_tools/examples/efile_drv.systemtap b/lib/runtime_tools/examples/efile_drv.systemtap
deleted file mode 100644
index 29c3637e10..0000000000
--- a/lib/runtime_tools/examples/efile_drv.systemtap
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * %CopyrightBegin%
- *
- * Copyright Scott Lystig Fritchie and Andreas Schultz, 2011-2016. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * %CopyrightEnd%
- */
-/*
- * Note: This file assumes that you're using the non-SMP-enabled Erlang
- *       virtual machine, "beam".  The SMP-enabled VM is called "beam.smp".
- *       Note that other variations of the virtual machine also have
- *       different names, e.g. the debug build of the SMP-enabled VM
- *       is "beam.debug.smp".
- *
- *       To use a different virtual machine, replace each instance of
- *       "beam" with "beam.smp" or the VM name appropriate to your
- *       environment.
- */
-
-probe begin
-{
-    op_map[1] = "OPEN";
-    op_map[2] = "READ";
-    op_map[3] = "LSEEK";
-    op_map[4] = "WRITE";
-    op_map[5] = "FSTAT";
-    op_map[6] = "PWD";
-    op_map[7] = "READDIR";
-    op_map[8] = "CHDIR";
-    op_map[9] = "FSYNC";
-    op_map[10] = "MKDIR";
-    op_map[11] = "DELETE";
-    op_map[12] = "RENAME";
-    op_map[13] = "RMDIR";
-    op_map[14] = "TRUNCATE";
-    op_map[15] = "READ_FILE";
-    op_map[16] = "WRITE_INFO";
-    op_map[19] = "LSTAT";
-    op_map[20] = "READLINK";
-    op_map[21] = "LINK";
-    op_map[22] = "SYMLINK";
-    op_map[23] = "CLOSE";
-    op_map[24] = "PWRITEV";
-    op_map[25] = "PREADV";
-    op_map[26] = "SETOPT";
-    op_map[27] = "IPREAD";
-    op_map[28] = "ALTNAME";
-    op_map[29] = "READ_LINE";
-    op_map[30] = "FDATASYNC";
-    op_map[31] = "FADVISE";
-}
-
-probe process("beam").mark("aio_pool-add")
-{
-    printf("async I/O pool port %s queue len %d\n", user_string($arg1), $arg2);
-}
-
-probe process("beam").mark("aio_pool-get")
-{
-    printf("async I/O pool port %s queue len %d\n", user_string($arg1), $arg2);
-}
-
-probe process("beam").mark("efile_drv-entry")
-{
-    printf("efile_drv enter tag={%d,%d} %s%s | %s (%d) | args: %s %s , %d %d (port %s)\n",
-	   $arg1, $arg2,
-           $arg3 == NULL ? "" : "user tag ",
-           $arg3 == NULL ? "" : user_string($arg3),
-           op_map[$arg4], $arg4,
-	   $arg5 == NULL ? "" : user_string($arg5),
-	   $arg6 == NULL ? "" : user_string($arg6), $arg7, $arg8,
-           /* NOTE: port name in $arg[11] is experimental */
-           user_string($arg11))
-}
-
-probe process("beam").mark("efile_drv-int*")
-{
-    printf("async I/O worker tag={%d,%d} | %s (%d) | %s\n",
-           $arg1, $arg2, op_map[$arg3], $arg3, probefunc());
-}
-
-probe process("beam").mark("efile_drv-return")
-{
-    if ($arg5 == 0) {
-       /* efile_drv-return error case */
-       printf("efile_drv return tag={%d,%d} %s%s | %s (%d) | errno %d\n",
-           $arg1, $arg2,
-           $arg3 == NULL ? "" : "user tag ",
-           $arg3 == NULL ? "" : user_string($arg3),
-           op_map[$arg4], $arg4,
-           $arg6);
-    } else {
-       /* efile_drv-return success case */
-       printf("efile_drv return tag={%d,%d} %s | %s (%d) ok\n",
-           $arg1, $arg2,
-           $arg3 == NULL ? "" : user_string($arg3),
-           op_map[$arg4], $arg4);
-    }
-}
-
-global op_map;
diff --git a/lib/runtime_tools/src/Makefile b/lib/runtime_tools/src/Makefile
index 5a99c6e240..6faa9c2e35 100644
--- a/lib/runtime_tools/src/Makefile
+++ b/lib/runtime_tools/src/Makefile
@@ -45,6 +45,7 @@ MODULES= \
 	system_information \
 	observer_backend \
 	ttb_autostart\
+	scheduler\
 	msacc
 
 HRL_FILES= ../include/observer_backend.hrl
diff --git a/lib/runtime_tools/src/erts_alloc_config.erl b/lib/runtime_tools/src/erts_alloc_config.erl
index 342363d08d..6c1a945484 100644
--- a/lib/runtime_tools/src/erts_alloc_config.erl
+++ b/lib/runtime_tools/src/erts_alloc_config.erl
@@ -265,7 +265,13 @@ strategy_str(aoff) ->
 strategy_str(aoffcbf) ->
     "Address order first fit carrier best fit";
 strategy_str(aoffcaobf) ->
-    "Address order first fit carrier adress order best fit".
+    "Address order first fit carrier adress order best fit";
+strategy_str(ageffcaoff) ->
+    "Age order first fit carrier address order first fit";
+strategy_str(ageffcbf) ->
+    "Age order first fit carrier best fit";
+strategy_str(ageffcaobf) ->
+    "Age order first fit carrier adress order best fit".
 
 default_acul(A, S) ->
     case carrier_migration_support(S) of
diff --git a/lib/runtime_tools/src/observer_backend.erl b/lib/runtime_tools/src/observer_backend.erl
index 1b075a507d..7ec3b38930 100644
--- a/lib/runtime_tools/src/observer_backend.erl
+++ b/lib/runtime_tools/src/observer_backend.erl
@@ -279,7 +279,7 @@ get_table_list(mnesia, Opts) ->
 			     end,
 		       [Tab|Acc]
 		   catch _:_What ->
-			   %% io:format("Skipped ~p: ~p ~p ~n",[Id, _What, erlang:get_stacktrace()]),
+			   %% io:format("Skipped ~p: ~p ~p ~n",[Id, _What, Stacktrace]),
 			   Acc
 		   end
 	   end,
@@ -293,7 +293,7 @@ fetch_stats_loop(Parent, Time) ->
     erlang:system_flag(scheduler_wall_time, true),
     receive
 	_Msg ->
-	    %% erlang:system_flag(scheduler_wall_time, false)
+	    erlang:system_flag(scheduler_wall_time, false),
 	    ok
     after Time ->
 	    _M = Parent ! {stats, 1,
@@ -340,7 +340,6 @@ etop_collect(Collector) ->
 
     case SchedulerWallTime of
 	undefined ->
-            erlang:system_flag(scheduler_wall_time,true),
             spawn(fun() -> flag_holder_proc(Collector) end),
             ok;
 	_ ->
@@ -348,10 +347,11 @@ etop_collect(Collector) ->
     end.
 
 flag_holder_proc(Collector) ->
+    erlang:system_flag(scheduler_wall_time,true),
     Ref = erlang:monitor(process,Collector),
     receive
 	{'DOWN',Ref,_,_,_} ->
-	    %% erlang:system_flag(scheduler_wall_time,false)
+	    erlang:system_flag(scheduler_wall_time,false),
 	    ok
     end.
 
diff --git a/lib/runtime_tools/src/runtime_tools.app.src b/lib/runtime_tools/src/runtime_tools.app.src
index 449532e5c4..09a9b447c2 100644
--- a/lib/runtime_tools/src/runtime_tools.app.src
+++ b/lib/runtime_tools/src/runtime_tools.app.src
@@ -23,6 +23,7 @@
     {modules,      [appmon_info, dbg,observer_backend,runtime_tools,
                     runtime_tools_sup,erts_alloc_config,
 		    ttb_autostart,dyntrace,system_information,
+                    scheduler,
                     msacc]},
     {registered,   [runtime_tools_sup]},
     {applications, [kernel, stdlib]},
diff --git a/lib/runtime_tools/src/scheduler.erl b/lib/runtime_tools/src/scheduler.erl
new file mode 100644
index 0000000000..c896b671ac
--- /dev/null
+++ b/lib/runtime_tools/src/scheduler.erl
@@ -0,0 +1,152 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2018. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%% @doc Utility functions for easier measurement of scheduler utilization
+%%      using erlang:statistics(scheduler_wall_time).
+
+-module(scheduler).
+
+-export([sample/0,
+         sample_all/0,
+         utilization/1,
+         utilization/2]).
+
+-export_type([sched_sample/0]).
+
+
+-opaque sched_sample() ::
+          {scheduler_wall_time | scheduler_wall_time_all,
+           [{sched_type(), sched_id(), ActiveTime::integer(), TotalTime::integer()}]}.
+
+-type sched_type() :: normal | cpu | io.
+
+-type sched_id() :: integer().
+
+-spec sample() -> sched_sample().
+sample() ->
+    sample(scheduler_wall_time).
+
+-spec sample_all() -> sched_sample().
+sample_all() ->
+    sample(scheduler_wall_time_all).
+
+sample(Stats) ->
+    case erlang:statistics(Stats) of
+        undefined ->
+            erlang:system_flag(scheduler_wall_time, true),
+            sample(Stats);
+        
+        List ->
+            Sorted = lists:sort(List),
+            Tagged = lists:map(fun({I, A, T}) -> {sched_tag(I), I, A, T} end,
+                               Sorted),
+            {Stats, Tagged}
+    end.
+
+-type sched_util_result() ::
+        [{sched_type(), sched_id(), float(), string()} |
+         {total, float(), string()} |
+         {weighted, float(), string()}].
+
+-spec utilization(Seconds) -> sched_util_result() when
+      Seconds :: pos_integer();
+                 (Sample) -> sched_util_result() when
+      Sample :: sched_sample().
+utilization(Seconds) when is_integer(Seconds), Seconds > 0 ->
+    OldFlag = erlang:system_flag(scheduler_wall_time, true),
+    T0 = sample(),
+    receive after Seconds*1000 -> ok end,
+    T1 = sample(),
+    case OldFlag of
+        false ->
+            erlang:system_flag(scheduler_wall_time, OldFlag);
+        true ->
+            ok
+    end,
+    utilization(T0,T1);
+
+utilization({Stats, _}=T0) when Stats =:= scheduler_wall_time;
+                                Stats =:= scheduler_wall_time_all ->
+    utilization(T0, sample(Stats)).
+
+-spec utilization(Sample1, Sample2) -> sched_util_result() when
+      Sample1 :: sched_sample(),
+      Sample2 :: sched_sample().
+utilization({Stats, Ts0}, {Stats, Ts1}) ->
+    Diffs = lists:map(fun({{Tag, I, A0, T0}, {Tag, I, A1, T1}}) ->
+                              {Tag, I, (A1 - A0), (T1 - T0)}
+                      end,
+                      lists:zip(Ts0,Ts1)),
+
+    {Lst0, {A, T, N}} = lists:foldl(fun({Tag, I, Adiff, Tdiff}, {Lst, Acc}) ->
+                                            R = safe_div(Adiff, Tdiff),
+                                            {[{Tag, I, R, percent(R)} | Lst],
+                                             acc(Tag, Adiff, Tdiff, Acc)}
+                                    end,
+                                    {[], {0, 0, 0}},
+                               Diffs),
+
+    Total = safe_div(A, T),
+    Lst1 = lists:reverse(Lst0),
+    Lst2 = case erlang:system_info(logical_processors_available) of
+               unknown -> Lst1;
+               LPA ->
+                   Weighted = Total * (N / LPA),
+                   [{weighted, Weighted, percent(Weighted)} | Lst1]
+           end,
+    [{total, Total, percent(Total)} | Lst2];
+
+utilization({scheduler_wall_time, _}=T0,
+            {scheduler_wall_time_all, Ts1}) ->
+    utilization(T0, {scheduler_wall_time, remove_io(Ts1)});
+
+utilization({scheduler_wall_time_all, Ts0},
+            {scheduler_wall_time, _}=T1) ->
+    utilization({scheduler_wall_time, remove_io(Ts0)}, T1).
+
+%% Do not include dirty-io in totals
+acc(io, _, _, Acc) ->
+    Acc;
+acc(Tag, Adiff, Tdiff, {Asum, Tsum, N}) when Tag =:= normal; Tag =:= cpu ->
+    {Adiff+Asum, Tdiff+Tsum, N+1}.
+
+
+remove_io(Ts) ->
+    lists:filter(fun({io,_,_,_}) -> false;
+                    (_) -> true end,
+                 Ts).
+
+safe_div(A, B) ->
+    if B == 0.0 -> 0.0;
+       true -> A / B
+    end.            
+
+sched_tag(Nr) ->
+    Normal = erlang:system_info(schedulers),
+    Cpu = Normal + erlang:system_info(dirty_cpu_schedulers),
+    case Nr of
+        _ when Nr =< Normal -> normal;
+        _ when Nr =< Cpu -> cpu;
+        _ -> io
+    end.
+
+
+percent(F) ->
+    float_to_list(F*100, [{decimals,1}]) ++ [$%].
diff --git a/lib/runtime_tools/src/system_information.erl b/lib/runtime_tools/src/system_information.erl
index 92109c9a74..136ee55b54 100644
--- a/lib/runtime_tools/src/system_information.erl
+++ b/lib/runtime_tools/src/system_information.erl
@@ -75,43 +75,37 @@ load_report(file, File)   -> load_report(data, from_file(File));
 load_report(data, Report) ->
     ok = start_internal(), gen_server:call(?SERVER, {load_report, Report}, infinity).
 
-report() -> [
-	{init_arguments,    init:get_arguments()},
-	{code_paths,        code:get_path()},
-	{code,              code()},
-	{system_info,       erlang_system_info()},
-	{erts_compile_info, erlang:system_info(compile_info)},
-	{beam_dynamic_libraries, get_dynamic_libraries()},
-	{environment_erts,  os_getenv_erts_specific()},
-	{environment,       [split_env(Env) || Env <- os:getenv()]},
-	{sanity_check,      sanity_check()}	     
-    ].
+report() ->
+    %% This is ugly but beats having to maintain two distinct implementations,
+    %% and we don't really care about memory use since it's internal and
+    %% undocumented.
+    {ok, Fd} = file:open([], [ram, read, write]),
+    to_fd(Fd),
+    {ok, _} = file:position(Fd, bof),
+    from_fd(Fd).
 
 -spec to_file(FileName) -> ok | {error, Reason} when
       FileName :: file:name_all(),
       Reason :: file:posix() | badarg | terminated | system_limit.
 
 to_file(File) ->
-    file:write_file(File, iolist_to_binary([
-		io_lib:format("{system_information_version, ~p}.~n", [
-			?REPORT_FILE_VSN
-		    ]),
-		io_lib:format("{system_information, ~p}.~n", [
-			report()
-		    ])
-	    ])).
+    case file:open(File, [raw, write, binary, delayed_write]) of
+        {ok, Fd} ->
+            try
+                to_fd(Fd)
+            after
+                file:close(Fd)
+            end;
+        {error, Reason} ->
+            {error, Reason}
+    end.
 
 from_file(File) ->
-    case file:consult(File) of
-	{ok, Data} ->
-	    case get_value([system_information_version], Data) of
-		?REPORT_FILE_VSN ->
-		    get_value([system_information], Data);
-		Vsn ->
-		    erlang:error({unknown_version, Vsn})
-	    end;
-	_ ->
-	    erlang:error(bad_report_file)
+    {ok, Fd} = file:open(File, [raw, read]),
+    try
+        from_fd(Fd)
+    after
+        file:close(Fd)
     end.
 
 applications() -> applications([]).
@@ -457,61 +451,151 @@ split_env([$=|Vs], Key) -> {lists:reverse(Key), Vs};
 split_env([I|Vs], Key)  -> split_env(Vs, [I|Key]);
 split_env([], KV)       -> lists:reverse(KV). % should not happen.
 
-%% get applications
+from_fd(Fd) ->
+    try
+        [{system_information_version, "1.0"},
+         {system_information, Data}] = consult_fd(Fd),
+        Data
+    catch
+        _:_ -> erlang:error(bad_report_file)
+    end.
 
-code() ->
-    % order is important
-    get_code_from_paths(code:get_path()).
+consult_fd(Fd) ->
+    consult_fd_1(Fd, [], {ok, []}).
+consult_fd_1(Fd, Cont0, ReadResult) ->
+    Data =
+        case ReadResult of
+            {ok, Characters} -> Characters;
+            eof -> eof
+        end,
+    case erl_scan:tokens(Cont0, Data, 1) of
+        {done, {ok, Tokens, _}, Next} ->
+            {ok, Term} = erl_parse:parse_term(Tokens),
+            [Term | consult_fd_1(Fd, [], {ok, Next})];
+        {more, Cont} ->
+            consult_fd_1(Fd, Cont, file:read(Fd, 1 bsl 20));
+        {done, {eof, _}, eof} -> []
+    end.
 
-get_code_from_paths([]) -> [];
-get_code_from_paths([Path|Paths]) ->
-    case is_application_path(Path) of
-	true -> 
-	    [{application, get_application_from_path(Path)}|get_code_from_paths(Paths)];
-	false ->
-	    [{code, [
-			{path,    Path},
-			{modules, get_modules_from_path(Path)}
-		    ]}|get_code_from_paths(Paths)]
+%%
+%% Dumps a system_information tuple to the given Fd, writing the term in chunks
+%% to avoid eating too much memory on large systems.
+%%
+
+to_fd(Fd) ->
+    EmitChunk =
+        fun(Format, Args) ->
+            ok = file:write(Fd, io_lib:format(Format, Args))
+        end,
+
+    EmitChunk("{system_information_version, ~w}.~n"
+              "{system_information,["
+                  "{init_arguments,~w},"
+                  "{code_paths,~w},",
+        [?REPORT_FILE_VSN,
+         init:get_arguments(),
+         code:get_path()]),
+
+    emit_code_info(EmitChunk),
+
+    EmitChunk(    ","  %% Note the leading comma!
+                  "{system_info,~w},"
+                  "{erts_compile_info,~w},"
+                  "{beam_dynamic_libraries,~w},"
+                  "{environment_erts,~w},"
+                  "{environment,~w},"
+                  "{sanity_check,~w}"
+              "]}.~n",
+        [erlang_system_info(),
+         erlang:system_info(compile_info),
+         get_dynamic_libraries(),
+         os_getenv_erts_specific(),
+         [split_env(Env) || Env <- os:getenv()],
+         sanity_check()]).
+
+%% Emits all modules/applications in the *code path order*
+emit_code_info(EmitChunk) ->
+    EmitChunk("{code, [", []),
+    comma_separated_foreach(EmitChunk,
+        fun(Path) ->
+            case is_application_path(Path) of
+                true -> emit_application_info(EmitChunk, Path);
+                false -> emit_code_path_info(EmitChunk, Path)
+            end
+        end, code:get_path()),
+    EmitChunk("]}", []).
+
+emit_application_info(EmitChunk, Path) ->
+    [Appfile|_] = filelib:wildcard(filename:join(Path, "*.app")),
+    case file:consult(Appfile) of
+        {ok, [{application, App, Info}]} ->
+            RtDeps = proplists:get_value(runtime_dependencies, Info, []),
+            Description = proplists:get_value(description, Info, []),
+            Version = proplists:get_value(vsn, Info, []),
+
+            EmitChunk("{application, {~w,["
+                          "{description,~w},"
+                          "{vsn,~w},"
+                          "{path,~w},"
+                          "{runtime_dependencies,~w},",
+                [App, Description, Version, Path, RtDeps]),
+            emit_module_info_from_path(EmitChunk, Path),
+            EmitChunk("]}}", [])
     end.
 
+emit_code_path_info(EmitChunk, Path) ->
+    EmitChunk("{code, ["
+                  "{path, ~w},", [Path]),
+    emit_module_info_from_path(EmitChunk, Path),
+    EmitChunk("]}", []).
+
+emit_module_info_from_path(EmitChunk, Path) ->
+    BeamFiles = filelib:wildcard(filename:join(Path, "*.beam")),
+
+    EmitChunk("{modules, [", []),
+    comma_separated_foreach(EmitChunk,
+        fun(Beam) ->
+            emit_module_info(EmitChunk, Beam)
+        end, BeamFiles),
+    EmitChunk("]}", []).
+
+emit_module_info(EmitChunk, Beam) ->
+    %% FIXME: The next three calls load *all* significant chunks onto the heap,
+    %% which may cause us to run out of memory if there's a huge module in the
+    %% code path.
+    {ok,{Mod, Md5}} = beam_lib:md5(Beam),
+
+    CompilerVersion = get_compiler_version(Beam),
+    Native = beam_is_native_compiled(Beam),
+
+    Loaded = case code:is_loaded(Mod) of
+        false -> false;
+        _     -> true
+    end,
+
+    EmitChunk("{~w,["
+                  "{loaded,~w},"
+                  "{native,~w},"
+                  "{compiler,~w},"
+                  "{md5,~w}"
+              "]}",
+        [Mod, Loaded, Native, CompilerVersion, hexstring(Md5)]).
+
+comma_separated_foreach(_EmitChunk, _Fun, []) ->
+    ok;
+comma_separated_foreach(_EmitChunk, Fun, [H]) ->
+    Fun(H);
+comma_separated_foreach(EmitChunk, Fun, [H | T]) ->
+    Fun(H),
+    EmitChunk(",", []),
+    comma_separated_foreach(EmitChunk, Fun, T).
+
 is_application_path(Path) ->
     case filelib:wildcard(filename:join(Path, "*.app")) of
 	[] -> false;
 	_  -> true
     end.
 
-get_application_from_path(Path) ->
-    [Appfile|_] = filelib:wildcard(filename:join(Path, "*.app")),
-    case file:consult(Appfile) of
-	{ok, [{application, App, Info}]} ->
-	    {App, [
-		    {description, proplists:get_value(description, Info, [])},
-		    {vsn,         proplists:get_value(vsn, Info, [])},
-		    {path,        Path},
-		    {runtime_dependencies,
-		     proplists:get_value(runtime_dependencies, Info, [])},
-		    {modules,     get_modules_from_path(Path)}
-		]}
-    end.
-
-get_modules_from_path(Path) ->
-    [ 
-	begin
-		{ok,{Mod, Md5}} = beam_lib:md5(Beam),
-		Loaded = case code:is_loaded(Mod) of
-		    false -> false;
-		    _     -> true
-		end,
-		{Mod, [
-			{loaded,   Loaded},
-			{native,   beam_is_native_compiled(Beam)},
-			{compiler, get_compiler_version(Beam)},
-			{md5,      hexstring(Md5)}
-		    ]}
-	end || Beam <- filelib:wildcard(filename:join(Path, "*.beam"))
-    ].
-
 hexstring(Bin) when is_binary(Bin) ->
     lists:flatten([io_lib:format("~2.16.0b", [V]) || <<V>> <= Bin]).
 
diff --git a/lib/runtime_tools/test/Makefile b/lib/runtime_tools/test/Makefile
index 61377ea09e..de37b2570d 100644
--- a/lib/runtime_tools/test/Makefile
+++ b/lib/runtime_tools/test/Makefile
@@ -9,6 +9,7 @@ MODULES =  \
 	system_information_SUITE \
 	dbg_SUITE \
 	erts_alloc_config_SUITE \
+	scheduler_SUITE \
 	msacc_SUITE
 
 ERL_FILES= $(MODULES:%=%.erl)
diff --git a/lib/runtime_tools/test/dbg_SUITE.erl b/lib/runtime_tools/test/dbg_SUITE.erl
index cfe8412e33..c5dcccb887 100644
--- a/lib/runtime_tools/test/dbg_SUITE.erl
+++ b/lib/runtime_tools/test/dbg_SUITE.erl
@@ -478,8 +478,7 @@ port(Config) when is_list(Config) ->
         TraceFileDrv = list_to_atom(lists:flatten(["trace_file_drv n ",TestFile])),
         [{trace,Port,open,S,TraceFileDrv},
          {trace,Port,getting_linked,S},
-         {trace,Port,closed,normal},
-         {trace,Port,unlink,S}] = flush()
+         {trace,Port,closed,normal}] = flush()
     after
         dbg:stop()
     end,
diff --git a/lib/runtime_tools/test/scheduler_SUITE.erl b/lib/runtime_tools/test/scheduler_SUITE.erl
new file mode 100644
index 0000000000..1c80253371
--- /dev/null
+++ b/lib/runtime_tools/test/scheduler_SUITE.erl
@@ -0,0 +1,104 @@
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2018. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+
+-module(scheduler_SUITE).
+
+-export([suite/0, all/0]).
+
+%% Test cases
+-export([basic/1]).
+
+all() -> [basic].
+
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+
+basic(_Config) ->
+    S1 = scheduler:sample(),
+    S2 = scheduler:sample_all(),
+
+    check(scheduler:utilization(1)),
+
+    check(scheduler:utilization(S1)),
+    check(scheduler:utilization(S2)),
+    check(scheduler:utilization(S1, scheduler:sample())),
+    check(scheduler:utilization(S2, scheduler:sample())),
+
+    S3 = scheduler:sample_all(),
+    U13 = scheduler:utilization(S1, S3),
+    U13 = scheduler:utilization(S1, remove_io(S3)),
+    check(U13),
+
+    U23all = scheduler:utilization(S2, S3),
+    check(U23all),
+    U23 = scheduler:utilization(S2, remove_io(S3)),
+    U23 = scheduler:utilization(remove_io(S2), S3),
+    U23 = remove_io(U23all),
+    check(U23),
+
+    ok.
+
+
+check([{total, Tf, Ts} | List]=U) ->
+    io:format("\nU = ~p\n", [U]),
+    check_values(Tf, Ts, true),
+
+    SchdList = case hd(List) of
+                   {weighted, Wf, Ws} ->
+                       check_values(Wf, Ws, false),
+                       tl(List);
+                   _ ->
+                       unknown = erlang:system_info(logical_processors_available),
+                       List
+               end,
+
+    lists:foreach(fun({Type, Id, F, S}) when ((Type =:= normal) or (Type =:= cpu) or (Type =:= io)),
+                                             is_integer(Id) ->
+                          check_values(F, S, true)
+                  end,
+                  SchdList),
+    ok.
+
+check_values(F, S, Max100) ->
+    true = is_float(F),
+    true = F >= 0.0,
+
+    $% = lists:last(S),
+    Sf = list_to_float(lists:droplast(S)),
+    true = Sf >= 0.0,
+    true = case Max100 of
+               true ->
+                   true = F =< 1.0,
+                   true = Sf =< 100.0;
+               false ->
+                   true
+           end,
+    MaxDiff = 0.055555555555555555,  %% change to 0.05 when float_to_list/2 is fixed
+    true = abs(F*100 - Sf) =< MaxDiff,
+    ok.
+
+
+remove_io({scheduler_wall_time_all,Lst}) ->
+    {scheduler_wall_time, remove_io(Lst)};
+remove_io(Lst) ->
+    lists:filter(fun({io,_,_,_}) -> false;
+                    (_) -> true end,
+                 Lst).
diff --git a/lib/runtime_tools/vsn.mk b/lib/runtime_tools/vsn.mk
index d8a4ede136..26869b9412 100644
--- a/lib/runtime_tools/vsn.mk
+++ b/lib/runtime_tools/vsn.mk
@@ -1 +1 @@
-RUNTIME_TOOLS_VSN = 1.12.2
+RUNTIME_TOOLS_VSN = 1.12.5
diff --git a/lib/sasl/doc/src/Makefile b/lib/sasl/doc/src/Makefile
index 76746e44e7..baf563ca62 100644
--- a/lib/sasl/doc/src/Makefile
+++ b/lib/sasl/doc/src/Makefile
@@ -47,8 +47,7 @@ XML_REF6_FILES = sasl_app.xml
 XML_PART_FILES = part.xml
 XML_CHAPTER_FILES = sasl_intro.xml \
 	error_logging.xml \
-	notes.xml \
-	notes_history.xml
+	notes.xml
 
 BOOK_FILES = book.xml
 
diff --git a/lib/sasl/doc/src/notes.xml b/lib/sasl/doc/src/notes.xml
index b144122c4b..e532c3cd6f 100644
--- a/lib/sasl/doc/src/notes.xml
+++ b/lib/sasl/doc/src/notes.xml
@@ -31,6 +31,26 @@
   </header>
   <p>This document describes the changes made to the SASL application.</p>
 
+<section><title>SASL 3.1.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    The Report Browser, rb, could earlier not handle reports
+	    that were not lists, for example generated by
+	    <c>error_logger:info_report({some, tuple})</c>. This term
+	    is allowed as input to error_logger, but rb would state
+	    that "A report on bad form was encountered". This is now
+	    corrected.</p>
+          <p>
+	    Own Id: OTP-13906 Aux Id: ERL-261 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>SASL 3.1</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/sasl/doc/src/release_handler.xml b/lib/sasl/doc/src/release_handler.xml
index 8f073807fb..975188f489 100644
--- a/lib/sasl/doc/src/release_handler.xml
+++ b/lib/sasl/doc/src/release_handler.xml
@@ -61,6 +61,7 @@
     <list type="bulleted">
       <item>A release upgrade file, <c>relup</c></item>
       <item>A system configuration file, <c>sys.config</c></item>
+      <item>A system configuration source file, <c>sys.config.src</c></item>
     </list>
     <p>The <c>relup</c> file contains instructions for how to upgrade
       to, or downgrade from, this version of the release.</p>
@@ -819,4 +820,3 @@ release_handler:set_unpacked(RelFile, [{myapp,"1.0","/home/user"},...]).
       <seealso marker="systools"><c>systools(3)</c></seealso></p>
   </section>
 </erlref>
-
diff --git a/lib/sasl/doc/src/systools.xml b/lib/sasl/doc/src/systools.xml
index e7c3c499da..4842c732b1 100644
--- a/lib/sasl/doc/src/systools.xml
+++ b/lib/sasl/doc/src/systools.xml
@@ -349,10 +349,11 @@ myapp-1/ebin/myapp.app
           the release version as specified in <c>Name.rel</c>.</p>
         <p><c>releases/RelVsn</c> contains the boot script
           <c>Name.boot</c> renamed to <c>start.boot</c> and, if found,
-          the files <c>relup</c> and <c>sys.config</c>. These files
+          the files <c>relup</c> and <c>sys.config</c> or <c>sys.config.src</c>. These files
           are searched for in the same directory as <c>Name.rel</c>,
           in the current working directory, and in any directories
-          specified using option <c>path</c>.</p>
+          specified using option <c>path</c>. In the case of <c>sys.config</c>
+          it is not included if <c>sys.config.src</c> is found.</p>
         <p>If the release package is to contain a new Erlang runtime
           system, the <c>bin</c> directory of the specified runtime
           system <c>{erts,Dir}</c> is copied to <c>erts-ErtsVsn/bin</c>.</p>
@@ -397,4 +398,3 @@ myapp-1/ebin/myapp.app
       <seealso marker="script"><c>script(4)</c></seealso></p>
   </section>
 </erlref>
-
diff --git a/lib/sasl/src/format_lib_supp.erl b/lib/sasl/src/format_lib_supp.erl
index cfe2ec7668..2d37dfe117 100644
--- a/lib/sasl/src/format_lib_supp.erl
+++ b/lib/sasl/src/format_lib_supp.erl
@@ -86,8 +86,10 @@ print_data(Device, Line, [{Key, Value}|T]) ->
 print_data(Device, Line, [Value|T]) ->
     Modifier = misc_supp:modifier(Device),
     io:format(Device, "~"++Modifier++"p~n", [Value]),
-    print_data(Device, Line, T).
-
+    print_data(Device, Line, T);
+print_data(Device, _Line, Value) ->
+    Modifier = misc_supp:modifier(Device),
+    io:format(Device, "~"++Modifier++"p~n", [Value]).
 
 print_items(Device, Line, {Name, Items}) ->
     print_items(Device, Line, Name, Items).
diff --git a/lib/sasl/src/systools_make.erl b/lib/sasl/src/systools_make.erl
index 391b1fb5cc..4c2ad8dfef 100644
--- a/lib/sasl/src/systools_make.erl
+++ b/lib/sasl/src/systools_make.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -310,6 +310,7 @@ add_apply_upgrade(Script,Args) ->
 %%                  RelVsn/start.boot
 %%                         relup
 %%                         sys.config
+%%                         sys.config.src
 %%         erts-EVsn[/bin]
 %%-----------------------------------------------------------------
 
@@ -1499,9 +1500,9 @@ mandatory_modules() ->
 preloaded() ->
     %% Sorted
     [erl_prim_loader,erl_tracer,erlang,
-     erts_code_purger,erts_dirty_process_code_checker,
+     erts_code_purger,erts_dirty_process_signal_handler,
      erts_internal,erts_literal_area_collector,
-     init,otp_ring0,prim_eval,prim_file,
+     init,otp_ring0,prim_buffer,prim_eval,prim_file,
      prim_inet,prim_zip,zlib].
 
 %%______________________________________________________________________
@@ -1552,6 +1553,7 @@ create_kernel_procs(Appls) ->
 %%                  RelVsn/start.boot
 %%                         relup
 %%                         sys.config
+%%                         sys.config.src
 %%         erts-EVsn[/bin]
 %%
 %% The VariableN.tar.gz files can also be stored as own files not
@@ -1707,14 +1709,18 @@ add_system_files(Tar, RelName, Release, Path1) ->
 	    add_to_tar(Tar, Relup, filename:join(RelVsnDir, "relup"))
     end,
 
-    case lookup_file("sys.config", Path) of
-	false ->
-	    ignore;
-	Sys ->
-	    check_sys_config(Sys),
-	    add_to_tar(Tar, Sys, filename:join(RelVsnDir, "sys.config"))
+    case lookup_file("sys.config.src", Path) of
+        false ->
+            case lookup_file("sys.config", Path) of
+                false ->
+                    ignore;
+                Sys ->
+	            check_sys_config(Sys),
+	            add_to_tar(Tar, Sys, filename:join(RelVsnDir, "sys.config"))
+            end;
+        SysSrc ->
+            add_to_tar(Tar, SysSrc, filename:join(RelVsnDir, "sys.config.src"))
     end,
-    
     ok.
 
 lookup_file(Name, [Dir|Path]) ->
diff --git a/lib/sasl/test/rb_SUITE.erl b/lib/sasl/test/rb_SUITE.erl
index 426dedbab5..4ba2540545 100644
--- a/lib/sasl/test/rb_SUITE.erl
+++ b/lib/sasl/test/rb_SUITE.erl
@@ -36,6 +36,7 @@ no_group_cases() ->
 
 groups() ->
     [{running_error_logger,[shuffle],[show,
+                                      show_other,
 				      list,
 				      rescan,
 				      start_stop_log,
@@ -165,6 +166,23 @@ show(Config) ->
 
     ok.
 
+show_other(Config) ->
+    PrivDir = ?config(priv_dir,Config),
+    OutFile = filename:join(PrivDir,"rb_SUITE_log.txt"),
+
+    %% Insert some reports in the error log and start rb
+    error_logger:info_report([rb_test_term_in_list]),
+    error_logger:info_report(rb_test_term_no_list),
+    ok = start_rb(OutFile),
+
+    %% Show by type and check content
+    [{_,I1},{_,I2}] = check_report(fun() -> rb:show(info_report) end,OutFile),
+
+    true = contains(I1,"rb_test_term_no_list"),
+    true = contains(I2,"rb_test_term_in_list"),
+
+    ok.
+
 list(Config) ->
     PrivDir = ?config(priv_dir,Config),
     OutFile = filename:join(PrivDir,"rb_SUITE_log.txt"),
diff --git a/lib/sasl/test/release_handler_SUITE.erl b/lib/sasl/test/release_handler_SUITE.erl
index 63b48e7a4e..edd2efdf05 100644
--- a/lib/sasl/test/release_handler_SUITE.erl
+++ b/lib/sasl/test/release_handler_SUITE.erl
@@ -22,7 +22,8 @@
 -include_lib("common_test/include/ct.hrl").
 -include("test_lib.hrl").
 
--compile(export_all).
+-compile([export_all, nowarn_export_all]).
+-export([scheduler_wall_time/0, garbage_collect/0]). %% rpc'ed
 
 % Default timetrap timeout (set in init_per_testcase).
 %-define(default_timeout, ?t:minutes(40)).
@@ -1085,8 +1086,9 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) ->
     Rel2Dir = filename:dirname(Rel2),
 
     %% Start a slave node
+    PA = filename:dirname(code:which(?MODULE)),
     {ok, Node} = t_start_node(otp_9395_update_many_mods, Rel1,
-			      filename:join(Rel1Dir,"sys.config")),
+			      filename:join(Rel1Dir,"sys.config"), "-pa " ++ PA),
 
     %% Start a lot of processes on the new node, all with refs to each
     %% module that will be updated
@@ -1109,8 +1111,8 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) ->
 		  [RelVsn2, filename:join(Rel2Dir, "sys.config")]),
 
     %% First, install release directly and check how much time it takes
-    rpc:call(Node,erlang,garbage_collect,[]),
-    rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]),
+    rpc:call(Node,?MODULE,garbage_collect,[]),
+    SWTFlag0 = spawn_link(Node, ?MODULE, scheduler_wall_time, []),
     {TInst0,{ok, _, []}} =
 	timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]),
     SWT0 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]),
@@ -1135,9 +1137,9 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) ->
 
     %% Finally install release after check and purge, and check that
     %% this install was faster than the first.
-    rpc:call(Node,erlang,system_flag,[scheduler_wall_time,false]),
-    rpc:call(Node,erlang,garbage_collect,[]),
-    rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]),
+    SWTFlag0 ! die,
+    rpc:call(Node,?MODULE,garbage_collect,[]),
+    _SWTFlag1 = spawn_link(Node, ?MODULE, scheduler_wall_time, []),
     {TInst2,{ok, _RelVsn1, []}} =
 	timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]),
     SWT2 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]),
@@ -1161,6 +1163,15 @@ otp_9395_update_many_mods(Conf) when is_list(Conf) ->
 
     ok.
 
+scheduler_wall_time() ->
+    erlang:system_flag(scheduler_wall_time,true),
+    receive _Msg -> normal end.
+
+garbage_collect() ->
+    Pids = processes(),
+    [erlang:garbage_collect(Pid) || Pid <- Pids].
+
+
 otp_9395_update_many_mods(cleanup,_Conf) ->
     stop_node(node_name(otp_9395_update_many_mods)).
 
@@ -1190,8 +1201,9 @@ otp_9395_rm_many_mods(Conf) when is_list(Conf) ->
     Rel2Dir = filename:dirname(Rel2),
 
     %% Start a slave node
+    PA = filename:dirname(code:which(?MODULE)),
     {ok, Node} = t_start_node(otp_9395_rm_many_mods, Rel1,
-			      filename:join(Rel1Dir,"sys.config")),
+			      filename:join(Rel1Dir,"sys.config"), "-pa " ++ PA),
 
     %% Start a lot of processes on the new node, all with refs to each
     %% module that will be updated
@@ -1214,8 +1226,8 @@ otp_9395_rm_many_mods(Conf) when is_list(Conf) ->
 		  [RelVsn2, filename:join(Rel2Dir, "sys.config")]),
 
     %% First, install release directly and check how much time it takes
-    rpc:call(Node,erlang,garbage_collect,[]),
-    rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]),
+    rpc:call(Node,?MODULE,garbage_collect,[]),
+    SWTFlag0 = spawn_link(Node, ?MODULE, scheduler_wall_time, []),
     {TInst0,{ok, _, []}} =
 	timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]),
     SWT0 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]),
@@ -1240,9 +1252,9 @@ otp_9395_rm_many_mods(Conf) when is_list(Conf) ->
 
     %% Finally install release after check and purge, and check that
     %% this install was faster than the first.
-    rpc:call(Node,erlang,system_flag,[scheduler_wall_time,false]),
-    rpc:call(Node,erlang,garbage_collect,[]),
-    rpc:call(Node,erlang,system_flag,[scheduler_wall_time,true]),
+    SWTFlag0 ! die,
+    rpc:call(Node,?MODULE,garbage_collect,[]),
+    _SWTFlag1 = spawn_link(Node, ?MODULE, scheduler_wall_time, []),
     {TInst2,{ok, _RelVsn1, []}} =
 	timer:tc(rpc,call,[Node, release_handler, install_release, [RelVsn2]]),
     SWT2 = rpc:call(Node,erlang,statistics,[scheduler_wall_time]),
@@ -1384,9 +1396,9 @@ upgrade_supervisor(Conf) when is_list(Conf) ->
     %% Check that the restart strategy and child spec is updated
     {status, _, {module, _}, [_, _, _, _, [_,_,{data,[{"State",State}]}|_]]} =
 	rpc:call(Node,sys,get_status,[a_sup]),
-    {state,_,RestartStrategy,[Child],_,_,_,_,_,_,_} = State,
+    {state,_,RestartStrategy,{[a],Db},_,_,_,_,_,_,_} = State,
     one_for_all = RestartStrategy, % changed from one_for_one
-    {child,_,_,_,_,brutal_kill,_,_} = Child, % changed from timeout 2000
+    {child,_,_,_,_,brutal_kill,_,_} = maps:get(a,Db), % changed from timeout 2000
 
     ok.
 
@@ -2568,15 +2580,15 @@ check_gg_info(Node,OtherAlive,OtherDead,Synced,N) ->
     GGI = rpc:call(Node, global_group, info, []),
     GI = rpc:call(Node, global, info,[]),
     try do_check_gg_info(OtherAlive,OtherDead,Synced,GGI,GI) 
-    catch _:E when N==0 ->
+    catch _:E:Stacktrace when N==0 ->
 	    ?t:format("~nERROR: check_gg_info failed for ~p:~n~p~n"
 		      "when GGI was: ~p~nand GI was: ~p~n",
-		      [Node,{E,erlang:get_stacktrace()},GGI,GI]),
+		      [Node,{E,Stacktrace},GGI,GI]),
 	    ?t:fail("check_gg_info failed");
-	  _:E ->
+	  _:E:Stacktrace ->
 	    ?t:format("~nWARNING: check_gg_info failed for ~p:~n~p~n"
 		      "when GGI was: ~p~nand GI was: ~p~n",
-		      [Node,{E,erlang:get_stacktrace()},GGI,GI]),
+		      [Node,{E,Stacktrace},GGI,GI]),
 	    timer:sleep(1000),
 	    check_gg_info(Node,OtherAlive,OtherDead,Synced,N-1)
     end.
diff --git a/lib/sasl/test/systools_SUITE.erl b/lib/sasl/test/systools_SUITE.erl
index 07748d975f..c8b2f31120 100644
--- a/lib/sasl/test/systools_SUITE.erl
+++ b/lib/sasl/test/systools_SUITE.erl
@@ -67,7 +67,7 @@ groups() ->
        otp_3065_circular_dependenies, included_and_used_sort_script]},
      {tar, [],
       [tar_options, normal_tar, no_mod_vsn_tar, system_files_tar,
-       invalid_system_files_tar, variable_tar,
+       system_src_file_tar, invalid_system_files_tar, variable_tar,
        src_tests_tar, var_tar, exref_tar, link_tar, no_sasl_tar,
        otp_9507_path_ebin]},
      {relup, [],
@@ -945,12 +945,47 @@ system_files_tar(Config) ->
 
     ok.
 
+
 system_files_tar(cleanup,Config) ->
     Dir = ?privdir,
     file:delete(filename:join(Dir,"sys.config")),
     file:delete(filename:join(Dir,"relup")),
     ok.
 
+%% make_tar: Check that sys.config.src and not sys.config is included
+system_src_file_tar(Config) ->
+    {ok, OldDir} = file:get_cwd(),
+
+    {LatestDir, LatestName} = create_script(latest,Config),
+
+    DataDir = filename:absname(?copydir),
+    LibDir = fname([DataDir, d_normal, lib]),
+    P = [fname([LibDir, 'db-2.1', ebin]),
+         fname([LibDir, 'fe-3.1', ebin])],
+
+    ok = file:set_cwd(LatestDir),
+
+    %% Add dummy sys.config and sys.config.src
+    ok = file:write_file("sys.config.src","[${SOMETHING}].\n"),
+    ok = file:write_file("sys.config","[].\n"),
+
+    {ok, _, _} = systools:make_script(LatestName, [silent, {path, P}]),
+    ok = systools:make_tar(LatestName, [{path, P}]),
+    ok = check_tar(fname(["releases","LATEST","sys.config.src"]), LatestName),
+    {error, _} = check_tar(fname(["releases","LATEST","sys.config"]), LatestName),
+    {ok, _, _} = systools:make_tar(LatestName, [{path, P}, silent]),
+    ok = check_tar(fname(["releases","LATEST","sys.config.src"]), LatestName),
+    {error, _} = check_tar(fname(["releases","LATEST","sys.config"]), LatestName),
+
+    ok = file:set_cwd(OldDir),
+
+    ok.
+
+system_src_file_tar(cleanup,Config) ->
+    Dir = ?privdir,
+    file:delete(filename:join(Dir,"sys.config")),
+    file:delete(filename:join(Dir,"sys.config.src")),
+    ok.
 
 %% make_tar: Check that make_tar fails if relup or sys.config exist
 %% but do not have valid content
diff --git a/lib/sasl/vsn.mk b/lib/sasl/vsn.mk
index e980a42688..2488197ec5 100644
--- a/lib/sasl/vsn.mk
+++ b/lib/sasl/vsn.mk
@@ -1 +1 @@
-SASL_VSN = 3.1
+SASL_VSN = 3.1.1
diff --git a/lib/snmp/doc/src/notes.xml b/lib/snmp/doc/src/notes.xml
index 4705804759..8d48cb911d 100644
--- a/lib/snmp/doc/src/notes.xml
+++ b/lib/snmp/doc/src/notes.xml
@@ -34,7 +34,54 @@
   </header>
 
 
-  <section><title>SNMP 5.2.7</title>
+  <section><title>SNMP 5.2.10</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    The example MIB EX1-MIB in the SNMP application has been
+	    corrected to match its example.</p>
+          <p>
+	    Own Id: OTP-14204 Aux Id: PR-1726 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>SNMP 5.2.9</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>SNMP 5.2.8</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    The <c>recbuf</c> configuration option was not propagated
+	    correctly to the socket for the SNMP Manager.</p>
+          <p>
+	    Own Id: OTP-13372 Aux Id: ERIERL-73 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>SNMP 5.2.7</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
       <list>
diff --git a/lib/snmp/doc/src/snmp_impl_example_agent.xml b/lib/snmp/doc/src/snmp_impl_example_agent.xml
index a86006a0a7..e576fa51f3 100644
--- a/lib/snmp/doc/src/snmp_impl_example_agent.xml
+++ b/lib/snmp/doc/src/snmp_impl_example_agent.xml
@@ -47,6 +47,7 @@
 EX1-MIB DEFINITIONS ::= BEGIN
  
           IMPORTS
+                  experimental   FROM RFC1155-SMI
                   RowStatus      FROM STANDARD-MIB
                   DisplayString  FROM RFC1213-MIB
                   OBJECT-TYPE    FROM RFC-1212
@@ -81,7 +82,7 @@ EX1-MIB DEFINITIONS ::= BEGIN
  
           FriendsEntry ::=
               SEQUENCE {
-            fIndex
+                   fIndex
                       INTEGER,
                    fName
                       DisplayString,
@@ -105,6 +106,7 @@ EX1-MIB DEFINITIONS ::= BEGIN
               DESCRIPTION
                       "Name of friend"
               ::= { friendsEntry 2 }
+
           fAddress OBJECT-TYPE
               SYNTAX  DisplayString (SIZE (0..255))
               ACCESS  read-write
@@ -112,6 +114,7 @@ EX1-MIB DEFINITIONS ::= BEGIN
               DESCRIPTION
                       "Address of friend"
               ::= { friendsEntry 3 }
+
            fStatus OBJECT-TYPE
               SYNTAX      RowStatus
               ACCESS      read-write
@@ -119,12 +122,13 @@ EX1-MIB DEFINITIONS ::= BEGIN
               DESCRIPTION
                       "The status of this conceptual row."
               ::= { friendsEntry 4 }
+
           fTrap TRAP-TYPE
               ENTERPRISE  example1
               VARIABLES   { myName, fIndex }
               DESCRIPTION
-                          "This trap is sent when something happens to
-         the friend specified by fIndex."
+                      "This trap is sent when something happens to
+                      the friend specified by fIndex."
               ::= 1
 END
     </code>
diff --git a/lib/snmp/src/app/snmp.appup.src b/lib/snmp/src/app/snmp.appup.src
index bde637744c..ca61782639 100644
--- a/lib/snmp/src/app/snmp.appup.src
+++ b/lib/snmp/src/app/snmp.appup.src
@@ -8,19 +8,6 @@
 %% {update, snmpa_local_db, soft, soft_purge, soft_purge, []}
 %% {add_module,  snmpm_net_if_mt}
  [
-  {<<"5\\.2\\.6">>,
-   [{load_module, snmpc, soft_purge, soft_purge, []},
-    {load_module, snmpc_lib, soft_purge, soft_purge, []}]},
-  {<<"5\\.2\\.5">>,
-   [{load_module, snmpc, soft_purge, soft_purge, []},
-    {load_module, snmpc_lib, soft_purge, soft_purge, []},
-    {load_module, snmp_generic, soft_purge, soft_purge, []}]},
-  {<<"5\\.2\\.4">>,
-   [{load_module, snmpc, soft_purge, soft_purge, []},
-    {load_module, snmp_generic, soft_purge, soft_purge, []},
-    {load_module, snmp, soft_purge, soft_purge, []},
-    {load_module, snmpc_lib, soft_purge, soft_purge, []},
-    {load_module, snmpc_mib_gram, soft_purge, soft_purge, []}]},
   {<<"5\\..*">>, [{restart_application, snmp}]},	
   {<<"4\\..*">>, [{restart_application, snmp}]}
  ],
@@ -30,19 +17,6 @@
 %% {remove, {snmpm_net_if_mt, soft_purge, soft_purge}}
  
  [
-  {<<"5\\.2\\.6">>,
-   [{load_module, snmpc, soft_purge, soft_purge, []},
-    {load_module, snmpc_lib, soft_purge, soft_purge, []}]},
-  {<<"5\\.2\\.5">>,
-   [{load_module, snmpc, soft_purge, soft_purge, []},
-    {load_module, snmpc_lib, soft_purge, soft_purge, []},
-    {load_module, snmp_generic, soft_purge, soft_purge, []}]},
-  {<<"5\\.2\\.4">>,
-   [{load_module, snmpc, soft_purge, soft_purge, []},
-    {load_module, snmp_generic, soft_purge, soft_purge, []},
-    {load_module, snmp, soft_purge, soft_purge, []},
-    {load_module, snmpc_lib, soft_purge, soft_purge, []},
-    {load_module, snmpc_mib_gram, soft_purge, soft_purge, []}]},
   {<<"5\\..*">>, [{restart_application, snmp}]},	
   {<<"4\\..*">>, [{restart_application, snmp}]}
  ]  	       
diff --git a/lib/snmp/src/manager/snmpm_net_if.erl b/lib/snmp/src/manager/snmpm_net_if.erl
index 93c987eb0f..29216f9d6a 100644
--- a/lib/snmp/src/manager/snmpm_net_if.erl
+++ b/lib/snmp/src/manager/snmpm_net_if.erl
@@ -1,7 +1,7 @@
 %% 
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2004-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2004-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -367,7 +367,7 @@ common_socket_opts(Opts) ->
 	     default ->
 		 [];
 	     Sz ->
-		 [{sndbuf, Sz}]
+		 [{recbuf, Sz}]
 	 end ++
 	 case get_opt(Opts, no_reuse, false) of
 	     false ->
diff --git a/lib/snmp/test/snmp_agent_test.erl b/lib/snmp/test/snmp_agent_test.erl
index 3c1a6f2afd..2ed2c4580c 100644
--- a/lib/snmp/test/snmp_agent_test.erl
+++ b/lib/snmp/test/snmp_agent_test.erl
@@ -605,7 +605,12 @@ init_per_group(multiple_reqs_3 = GroupName, Config) ->
 init_per_group(test_multi_threaded = GroupName, Config) -> 
     init_mt(snmp_test_lib:init_group_top_dir(GroupName, Config));
 init_per_group(test_v3 = GroupName, Config) -> 
-    init_v3(snmp_test_lib:init_group_top_dir(GroupName, Config));
+    case snmp_test_lib:crypto_start() of
+        ok ->
+            init_v3(snmp_test_lib:init_group_top_dir(GroupName, Config));
+        _ ->
+            {skip, "Crypto did not start"}
+    end;
 init_per_group(test_v1_v2 = GroupName, Config) -> 
     init_v1_v2(snmp_test_lib:init_group_top_dir(GroupName, Config));
 init_per_group(test_v2 = GroupName, Config) -> 
@@ -631,11 +636,26 @@ init_per_group(mib_storage_varm_dets = GroupName, Config) ->
     init_varm_mib_storage_dets(
       snmp_test_lib:init_group_top_dir(GroupName, Config));
 init_per_group(mib_storage_size_check_mnesia = GroupName, Config) -> 
-    init_size_check_msm(snmp_test_lib:init_group_top_dir(GroupName, Config));
+       case snmp_test_lib:crypto_start() of
+           ok ->
+               init_size_check_msm(snmp_test_lib:init_group_top_dir(GroupName, Config));
+           _ ->
+               {skip, "Crypto did not start"}
+       end;
 init_per_group(mib_storage_size_check_dets = GroupName, Config) -> 
-    init_size_check_msd(snmp_test_lib:init_group_top_dir(GroupName, Config));
+       case snmp_test_lib:crypto_start() of
+           ok ->
+               init_size_check_msm(snmp_test_lib:init_group_top_dir(GroupName, Config));
+           _ ->
+               {skip, "Crypto did not start"}
+       end;
 init_per_group(mib_storage_size_check_ets = GroupName, Config) -> 
-    init_size_check_mse(snmp_test_lib:init_group_top_dir(GroupName, Config));
+           case snmp_test_lib:crypto_start() of
+           ok ->
+               init_size_check_msm(snmp_test_lib:init_group_top_dir(GroupName, Config));
+           _ ->
+               {skip, "Crypto did not start"}
+       end;
 init_per_group(mib_storage_mnesia = GroupName, Config) -> 
     init_mib_storage_mnesia(snmp_test_lib:init_group_top_dir(GroupName, 
 							     Config));
diff --git a/lib/snmp/test/snmp_manager_test.erl b/lib/snmp/test/snmp_manager_test.erl
index 4bfeb0f8d1..6ced55f0cc 100644
--- a/lib/snmp/test/snmp_manager_test.erl
+++ b/lib/snmp/test/snmp_manager_test.erl
@@ -156,16 +156,25 @@ init_per_suite(Config0) when is_list(Config0) ->
     ?DBG("init_per_suite -> entry with"
 	 "~n   Config0: ~p", [Config0]),
 
-    Config1   = snmp_test_lib:init_suite_top_dir(?MODULE, Config0), 
-    Config2   = snmp_test_lib:fix_data_dir(Config1),
-
-    %% Mib-dirs
-    %% data_dir is trashed by the test-server / common-test
-    %% so there is no point in fixing it...
-    MibDir    = snmp_test_lib:lookup(data_dir, Config2),
-    StdMibDir = filename:join([code:priv_dir(snmp), "mibs"]),
-
-    [{mib_dir, MibDir}, {std_mib_dir, StdMibDir} | Config2].
+    %% Preferably this test SUITE should be divided into groups
+    %% so that if crypto does not work only v3 tests that
+    %% need crypto will be skipped, but as this is only a
+    %% problem with one legacy test machine, we will procrastinate
+    %% until we have a more important reason to fix this. 
+    case snmp_test_lib:crypto_start() of
+        ok ->
+            Config1   = snmp_test_lib:init_suite_top_dir(?MODULE, Config0), 
+            Config2   = snmp_test_lib:fix_data_dir(Config1),
+            %% Mib-dirs
+            %% data_dir is trashed by the test-server / common-test
+            %% so there is no point in fixing it...
+            MibDir    = snmp_test_lib:lookup(data_dir, Config2),
+            StdMibDir = filename:join([code:priv_dir(snmp), "mibs"]),
+            
+            [{mib_dir, MibDir}, {std_mib_dir, StdMibDir} | Config2];
+        _ ->
+            {skip, "Crypto did not start"}
+    end.
 
 end_per_suite(Config) when is_list(Config) ->
 
diff --git a/lib/snmp/test/snmp_to_snmpnet_SUITE.erl b/lib/snmp/test/snmp_to_snmpnet_SUITE.erl
index 24c14d86ea..6a3466b6e4 100644
--- a/lib/snmp/test/snmp_to_snmpnet_SUITE.erl
+++ b/lib/snmp/test/snmp_to_snmpnet_SUITE.erl
@@ -88,8 +88,17 @@ groups() ->
     ].
 
 init_per_suite(Config) ->
-    [{agent_port, ?AGENT_PORT}, {manager_port, ?MANAGER_PORT} | Config].
-    
+    case re:run(os:cmd("snmpd -v"),"NET-SNMP", [{capture, first}]) of
+        nomatch ->
+            {skip, "snmpd is NOT NET-SNMP"};
+        {match, _} ->
+            case re:run(os:cmd("snmpd -v"),"5.4|5.6.2.1", [{capture, first}]) of
+                nomatch ->
+                    [{agent_port, ?AGENT_PORT}, {manager_port, ?MANAGER_PORT} | Config];
+                {match, _} ->
+                    {skip, "buggy snmpd"}
+            end
+    end.
 end_per_suite(_Config) ->
     ok.
 
@@ -322,7 +331,7 @@ snmpget(Oid, Transport, Config) ->
 
     Args =
 	["-c", "public", net_snmp_version(Versions),
-	 "-m", "",
+	 "-m", ":",
 	 "-Cf",
 	 net_snmp_addr_str(Transport),
 	 oid_str(Oid)],
@@ -353,11 +362,13 @@ start_snmpd(Community, SysDescr, Config) ->
 	["--rocommunity"++domain_suffix(Domain)++"="
 	 ++Community++" "++inet_parse:ntoa(Ip)
 	 || {Domain, {Ip, _}} <- Targets],
+
     SnmpdArgs =
-	["-f", "-r", %"-Dverbose",
-	 "-c", filename:join(DataDir, "snmpd.conf"),
-	 "-C", "-Lo",
-	 "-m", "",
+        ["-f", "-r", %"-Dverbose",
+         "-c", filename:join(DataDir, "snmpd.conf"),
+         "-C",
+         "-Lo",
+	 "-m", ":",
 	 "--sysDescr="++SysDescr,
 	 "--agentXSocket=tcp:localhost:"++integer_to_list(Port)]
 	++ CommunityArgs
diff --git a/lib/snmp/vsn.mk b/lib/snmp/vsn.mk
index 207f0084d8..2c97683625 100644
--- a/lib/snmp/vsn.mk
+++ b/lib/snmp/vsn.mk
@@ -19,6 +19,6 @@
 # %CopyrightEnd%
 
 APPLICATION = snmp
-SNMP_VSN    = 5.2.7
+SNMP_VSN    = 5.2.10
 PRE_VSN     =
 APP_VSN     = "$(APPLICATION)-$(SNMP_VSN)$(PRE_VSN)"
diff --git a/lib/ssh/doc/src/Makefile b/lib/ssh/doc/src/Makefile
index e066b787f3..f54f5e0708 100644
--- a/lib/ssh/doc/src/Makefile
+++ b/lib/ssh/doc/src/Makefile
@@ -52,9 +52,9 @@ XML_PART_FILES = \
 		 usersguide.xml
 XML_CHAPTER_FILES = notes.xml \
 	introduction.xml \
-	ssh_protocol.xml \
 	using_ssh.xml \
 	configure_algos.xml
+#	ssh_protocol.xml \
 
 BOOK_FILES = book.xml
 
diff --git a/lib/ssh/doc/src/notes.xml b/lib/ssh/doc/src/notes.xml
index ef3e94a1e1..db60b4ab6f 100644
--- a/lib/ssh/doc/src/notes.xml
+++ b/lib/ssh/doc/src/notes.xml
@@ -30,12 +30,193 @@
     <file>notes.xml</file>
   </header>
 
-<section><title>Ssh 4.6.1</title>
+<section><title>Ssh 4.6.7</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix bad spec in ssh.hrl: <c>double_algs()</c>.</p>
+          <p>
+	    Own Id: OTP-14990</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.6.6</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
       <list>
         <item>
           <p>
+	    Remove a blocking risk when a channel is closed and an
+	    operation is tried on that channel after at least a
+	    second's time gap.</p>
+          <p>
+	    Own Id: OTP-14939</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Added ssh_compat_SUITE.</p>
+          <p>
+	    This suite contains a number of interoperability tests
+	    mainly with OpenSSH. The tests start docker containers
+	    with different OpenSSH and OpenSSL/LibreSSLcryptolib
+	    versions and performs a number of tests of supported
+	    algorithms.</p>
+          <p>
+	    All login methods and all user's public key types are
+	    tested both for the client and the server.</p>
+          <p>
+	    All algorithms for kex, cipher, host key, mac and
+	    compressions are tested with a number of exec and sftp
+	    tests, both for the client and the server.</p>
+          <p>
+	    Own Id: OTP-14194 Aux Id: OTP-12487 </p>
+        </item>
+        <item>
+          <p>
+	    Default exec is disabled when a user-defined shell is
+	    enabled.</p>
+          <p>
+	    Own Id: OTP-14881</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.6.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Adjusted supervisor timeouts</p>
+          <p>
+	    Own Id: OTP-14907</p>
+        </item>
+        <item>
+          <p>
+	    Remove ERROR messages for slow process exits</p>
+          <p>
+	    Own Id: OTP-14930</p>
+        </item>
+      </list>
+    </section>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Add option <c>save_accepted_host</c> to
+	    <c>ssh:connection</c>. This option, if set to false,
+	    inhibits saving host keys to e.g the file
+	    <c>known_hosts</c>.</p>
+          <p>
+	    Own Id: OTP-14935</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.6.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix problem with OpenSSH 7.2 (and later) clients that has
+	    used sha1 instead of sha2 for rsa-sha-256/512 user's
+	    public keys.</p>
+          <p>
+	    Own Id: OTP-14827 Aux Id: ERL-531 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.6.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Passphrase option for ecdsa public keys was missing.</p>
+          <p>
+	    Own Id: OTP-14602</p>
+        </item>
+      </list>
+    </section>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    The host and user public key handling is hardened so that
+	    a faulty plugin can't deliver a key of wrong type.</p>
+          <p>
+	    Better checks in the server of the available hostkey's
+	    types at start and at each accept.</p>
+          <p>
+	    Better checks in the client of the available user public
+	    key types at connect.</p>
+          <p>
+	    Own Id: OTP-14676 Aux Id: ERIERL-52, OTP-14570 </p>
+        </item>
+        <item>
+          <p>
+	    SSH can now fetch the host key from the private keys
+	    stored in an Engine. See the crypto application for
+	    details about Engines.</p>
+          <p>
+	    Own Id: OTP-14757</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.6.2</title>
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Trailing white space was removed at end of the
+	    hello-string. This caused interoperability problems with
+	    some other ssh-implementations (e.g OpenSSH 7.3p1 on
+	    Solaris 11)</p>
+          <p>
+	    Own Id: OTP-14763 Aux Id: ERIERL-74 </p>
+        </item>
+        <item>
+          <p>
+	    Fixes that tcp connections that was immediately closed
+	    (SYN, SYNACK, ACK, RST) by a client could be left in a
+	    zombie state.</p>
+          <p>
+	    Own Id: OTP-14778 Aux Id: ERIERL-104 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.6.1</title>
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
 	    Fixed broken printout</p>
           <p>
 	    Own Id: OTP-14645</p>
@@ -286,6 +467,40 @@
 
 </section>
 
+
+<section><title>Ssh 4.4.2.2</title>
+    <section><title>Improvements and New Features</title>
+    <list>
+        <item>
+          <p>
+	    Default exec is disabled when a user-defined shell is
+	    enabled.</p>
+          <p>
+	    Own Id: OTP-14881</p>
+        </item>
+      </list>
+    </section>
+</section>
+
+
+<section><title>Ssh 4.4.2.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Trailing white space was removed at end of the
+	    hello-string. This caused interoperability problems with
+	    some other ssh-implementations (e.g OpenSSH 7.3p1 on
+	    Solaris 11)</p>
+          <p>
+	    Own Id: OTP-14763 Aux Id: ERIERL-74 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Ssh 4.4.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
@@ -656,6 +871,93 @@
 
 </section>
 
+<section><title>Ssh 4.2.2.5</title>
+    <section><title>Improvements and New Features</title>
+    <list>
+        <item>
+          <p>
+	    Default exec is disabled when a user-defined shell is
+	    enabled.</p>
+          <p>
+	    Own Id: OTP-14881</p>
+        </item>
+      </list>
+    </section>
+</section>
+
+
+<section><title>Ssh 4.2.2.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Trailing white space was removed at end of the
+	    hello-string. This caused interoperability problems with
+	    some other ssh-implementations (e.g OpenSSH 7.3p1 on
+	    Solaris 11)</p>
+          <p>
+	    Own Id: OTP-14763 Aux Id: ERIERL-74 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.2.2.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    The key exchange algorithm
+	    diffie-hellman-group-exchange-sha* has a server-option
+	    <c>{dh_gex_limits,{Min,Max}}</c>. There was a hostkey
+	    signature validation error on the client side if the
+	    option was used and the <c>Min</c> or the <c>Max</c>
+	    differed from the corresponding values obtained from the
+	    client.</p>
+          <p>
+	    This bug is now corrected.</p>
+          <p>
+	    Own Id: OTP-14166</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Key exchange algorithms
+	    diffie-hellman-group-exchange-sha* optimized, up to a
+	    factor of 11 for the slowest ( = biggest and safest) one.</p>
+          <p>
+	    Own Id: OTP-14169 Aux Id: seq-13261 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Ssh 4.2.2.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Upgrade of an established client connection could crash
+	    because the ssh client supervisors children had wrong
+	    type. This is fixed now.</p>
+          <p>
+	    Own Id: OTP-13782 Aux Id: seq13158 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Ssh 4.2.2.1</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/ssh/doc/src/ssh.xml b/lib/ssh/doc/src/ssh.xml
index 337f4094cc..d36be8431c 100644
--- a/lib/ssh/doc/src/ssh.xml
+++ b/lib/ssh/doc/src/ssh.xml
@@ -67,24 +67,41 @@
     <taglist>
       <tag><c>boolean() =</c></tag>
       <item><p><c>true | false</c></p></item>
+
       <tag><c>string() =</c></tag>
       <item><p><c>[byte()]</c></p></item>
+
       <tag><c>ssh_daemon_ref() =</c></tag>
       <item><p>opaque() -
       as returned by <c>ssh:daemon/[1,2,3]</c></p></item>
+
+      <tag><c>ok_error(OKtype) = </c></tag>
+      <item><p><c>{ok,OKtype} | {error, term()}</c></p></item>
+
+      <tag><c>ok_error() = </c></tag>
+      <item><p><c>ok_error(term())</c></p></item>
+
       <tag><c>ssh_connection_ref() =</c></tag>
       <item><p>opaque() - as returned by <c>ssh:connect/3</c></p></item>
+
       <tag><c>ip_address() =</c></tag>
-      <item><p><c>inet::ip_address</c></p></item>
+      <item><p><c>inet::ip_address()</c></p></item>
+
+      <tag><c>port_number() =</c></tag>
+      <item><p><c>inet::port_number()</c></p></item>
+
       <tag><c>subsystem_spec() =</c></tag>
       <item><p><c>{subsystem_name(),
       {channel_callback(), channel_init_args()}}</c></p></item>
+
       <tag><c>subsystem_name() =</c></tag>
       <item><p><c>string()</c></p></item>
+
       <tag><c>channel_callback() =</c></tag>
       <item><p><c>atom()</c> - Name of the Erlang module
       implementing the subsystem using the <c>ssh_channel</c> behavior, see
       <seealso marker="ssh_channel">ssh_channel(3)</seealso></p></item>
+
       <tag><c>key_cb() =</c></tag>
       <item>
         <p><c>atom() | {atom(), list()}</c></p>
@@ -94,6 +111,7 @@
         case maybe.</p>
         <p><c>list()</c> - List of options that can be passed to the callback module.</p>
       </item>
+
       <tag><c>channel_init_args() =</c></tag>
       <item><p><c>list()</c></p></item>
 
@@ -227,6 +245,18 @@
               </item>
             </list>
 	  </item>
+
+	  <tag><c><![CDATA[{save_accepted_host, boolean()}]]></c></tag>
+	  <item>
+	    <p>If <c>true</c>, the client saves an accepted host key to avoid the
+	    accept question the next time the same host is connected. If the option
+	    <c>key_cb</c> is not present, the key is saved in the file "known_hosts".
+	    </p>
+	    <p>If <c>false</c>, the key is not saved and the key will still be unknown
+	    at the next access of the same host.
+	    </p>
+	  </item>
+
 	  <tag><c><![CDATA[{user_interaction, boolean()}]]></c></tag>
 	  <item>
 	    <p>If <c>false</c>, disables the client to connect to the server
@@ -466,8 +496,8 @@
         <v>Option = client_version | server_version | user | peer | sockname </v>
 	<v>Value = [option_value()] </v>
 	<v>option_value() = {{Major::integer(), Minor::integer()}, VersionString::string()} |
-	User::string() |  Peer::{inet:hostname(), {inet::ip_adress(), inet::port_number()}} |
-	Sockname::{inet::ip_adress(), inet::port_number()}</v>
+	User::string() |  Peer::{inet:hostname(), {ip_address(), port_number()}} |
+	Sockname::{ip_address(), port_number()}</v>
       </type>
       <desc>
         <p>Retrieves information about a connection.</p>
@@ -529,22 +559,83 @@
 	    The option can be set to the empty list if
 	    you do not want the daemon to run any subsystems.</p>
 	  </item>
-	  <tag><c><![CDATA[{shell, {Module, Function, Args} |
+
+	  <tag><marker id="daemon_opt_shell"/>
+	  <c><![CDATA[{shell, {Module, Function, Args} |
 	  fun(string() = User) - > pid() | fun(string() = User,
 	  ip_address() = PeerAddr) -> pid()}]]></c></tag>
 	  <item>
 	    <p>Defines the read-eval-print loop used when a shell is
 	    requested by the client. The default is to use the Erlang shell:
 	    <c><![CDATA[{shell, start, []}]]></c></p>
+	    <p>See the option <seealso marker="#daemon_opt_exec"><c>exec</c></seealso>
+	    for a description of how the daemon execute exec-requests depending on
+	    the shell- and exec-options.</p>
+	  </item>
+
+	  <tag><marker id="daemon_opt_exec"/>
+	  <c><![CDATA[{exec, {direct, exec_spec()}}]]></c>
+	  <br/><c>where:</c>
+	  <br/><c>exec_spec() = </c>
+	  <br/><c>  fun(Cmd::string()) -> ok_error()</c>
+	  <br/><c>  | fun(Cmd::string(), User::string()) -> ok_error()</c>
+	  <br/><c>  | fun(Cmd::string(), User::string(), ClientAddr::{ip_address(), port_number()}) -> ok_error()</c>
+	  </tag>
+	  <item>
+	    <p>This option changes how the daemon execute exec-requests from clients. The term in <c>ok_error()</c>
+	    is formatted to a string if it is a non-string type. No trailing newline is added in the ok-case but in the
+	    error case.</p>
+	    <p>Error texts are returned on channel-type 1 which usually are piped to <c>stderr</c> on e.g Linux systems.
+	    Texts from a successful execution will in similar manner be piped to <c>stdout</c>. The exit-status code
+	    is set to 0 for success and -1 for errors. The exact results presented on the client side depends on the
+	    client.
+	    </p>
+	    <p>The option cooperates with the daemon-option <seealso marker="#daemon_opt_shell"><c>shell</c></seealso>
+	    in the following way:</p>
+	    <taglist>
+	      <tag>1. If the exec-option is present (the shell-option may or may not be present):</tag>
+	      <item>
+		<p>The exec-option fun is called with the same number of parameters as the arity of the fun,
+		and the result is returned to the client.
+		</p>
+	      </item>
+	      
+	      <tag>2. If the exec-option is absent, but a shell-option is present with the default Erlang shell:</tag>
+	      <item>
+		<p>The default Erlang evaluator is used and the result is returned to the client.</p>
+	      </item>
+
+	      <tag>3. If the exec-option is absent, but a shell-option is present that is not the default Erlang shell:</tag>
+	      <item>
+		<p>The exec-request is not evaluated and an error message is returned to the client.</p>
+	      </item>
+
+	      <tag>4. If neither the exec-option nor the shell-option is present:</tag>
+	      <item>
+		<p>The default Erlang evaluator is used and the result is returned to the client.</p>
+	      </item>
+	    </taglist>
+	    <p>If a custom CLI is installed (see the option <seealso marker="#daemon_opt_ssh_cli"><c>ssh_cli</c></seealso>)
+	    the rules above are replaced by thoose implied by the custom CLI.
+	    </p>
+	    <note>
+	      <p>The exec-option has existed for a long time but has not previously been documented. The old
+	      definition and behaviour are retained but obey the rules 1-4 above if conflicting.
+	      The old and undocumented style should not be used in new programs.</p>
+	    </note>
 	  </item>
-	  <tag><c><![CDATA[{ssh_cli, {channel_callback(),
+
+	  <tag><marker id="daemon_opt_ssh_cli"/>
+	  <c><![CDATA[{ssh_cli, {channel_callback(),
 	  channel_init_args()} | no_cli}]]></c></tag>
 	  <item>
 	    <p>Provides your own CLI implementation, that is, a channel callback
 	    module that implements a shell and command execution. The shell
 	    read-eval-print loop can be customized, using the
-	    option <c>shell</c>. This means less work than implementing
-	    an own CLI channel. If set to <c>no_cli</c>, the CLI channels
+	    option <seealso marker="#daemon_opt_shell"><c>shell</c></seealso>. This means less work than implementing
+	    an own CLI channel. If <c>ssh_cli</c> is set to <c>no_cli</c>, the CLI channels
+	    like <seealso marker="#daemon_opt_shell"><c>shell</c></seealso>
+	    and <seealso marker="#daemon_opt_exec"><c>exec</c></seealso>
 	    are disabled and only subsystem channels are allowed.</p>
 	  </item>
 	  <tag><c><![CDATA[{user_dir, string()}]]></c></tag>
diff --git a/lib/ssh/doc/src/ssh_client_key_api.xml b/lib/ssh/doc/src/ssh_client_key_api.xml
index a1cd9d4b02..98a1676ca4 100644
--- a/lib/ssh/doc/src/ssh_client_key_api.xml
+++ b/lib/ssh/doc/src/ssh_client_key_api.xml
@@ -56,11 +56,17 @@
       <tag><c>string() =</c></tag>
       <item><p><c>[byte()]</c></p></item>
       <tag><c>public_key() =</c></tag>
-      <item><p><c>#'RSAPublicKey'{}| {integer(),  #'Dss-Parms'{}}| term()</c></p></item>
+      <item><p><c>#'RSAPublicKey'{} 
+      | {integer(),#'Dss-Parms'{}} 
+      | {#'ECPoint'{},{namedCurve,Curve::string()}}</c></p></item>
       <tag><c>private_key() =</c></tag>
-      <item><p><c>#'RSAPrivateKey'{} | #'DSAPrivateKey'{} | term()</c></p></item>
+      <item><p><c>#'RSAPrivateKey'{} 
+      | #'DSAPrivateKey'{} 
+      | #'ECPrivateKey'{}</c></p></item>      
       <tag><c>public_key_algorithm() =</c></tag>
-      <item><p><c>'ssh-rsa'| 'ssh-dss' | atom()</c></p></item>
+      <item><p><c>'ssh-rsa' | 'ssh-dss' 
+      | 'rsa-sha2-256' | 'rsa-sha2-384' | 'rsa-sha2-512' 
+      | 'ecdsa-sha2-nistp256' | 'ecdsa-sha2-nistp384' | 'ecdsa-sha2-nistp521' </c></p></item>
     </taglist>
   </section>
 
@@ -73,10 +79,11 @@
       <d>Description of the host that owns the <c>PublicKey</c>.</d>
 
       <v>Key = public_key()</v>
-      <d>Normally an RSA or DSA public key, but handling of other public keys can be added.</d>
+      <d>Normally an RSA, DSA or ECDSA public key, but handling of other public keys can be added.</d>
 
       <v>ConnectOptions = proplists:proplist()</v>
-      <d>Options provided to <seealso marker="ssh#connect-3">ssh:connect/[3,4]</seealso></d>
+      <d>Options provided to <seealso marker="ssh#connect-3">ssh:connect/[3,4]</seealso>. The option list given in
+	the <c>key_cb</c> option is available with the key <c>key_cb_private</c>.</d>
       <v>Reason = term().</v>
       </type>
       <desc>
@@ -89,17 +96,17 @@
       <fsummary>Checks if a host key is trusted.</fsummary>
       <type>
 	<v>Key = public_key() </v>
-	<d>Normally an RSA or DSA public key, but handling of other public keys can be added.</d>
+	<d>Normally an RSA, DSA or ECDSA public key, but handling of other public keys can be added.</d>
 
 	<v>Host = string()</v>
 	<d>Description of the host.</d>
 
 	<v>Algorithm = public_key_algorithm()</v>
-	<d>Host key algorithm. Is to support <c>'ssh-rsa'| 'ssh-dss'</c>, but more algorithms
-	can be handled.</d>
+	<d>Host key algorithm.</d>
 
 	<v>ConnectOptions = proplists:proplist() </v>
-	<d>Options provided to <seealso marker="ssh#connect-3">ssh:connect/[3,4]</seealso>.</d>
+	<d>Options provided to <seealso marker="ssh#connect-3">ssh:connect/[3,4]</seealso>. The option list given in
+	the <c>key_cb</c> option is available with the key <c>key_cb_private</c>.</d>
 
 	<v>Result = boolean()</v>
       </type>
@@ -110,15 +117,15 @@
 
     <func>
       <name>Module:user_key(Algorithm, ConnectOptions) ->
-      {ok,  PrivateKey}  | {error, Reason}</name>
+      {ok, PrivateKey}  | {error, Reason}</name>
       <fsummary>Fetches the users <em>public key</em> matching the <c>Algorithm</c>.</fsummary>
       <type>
 	<v>Algorithm = public_key_algorithm()</v>
-	<d>Host key algorithm. Is to support <c>'ssh-rsa'| 'ssh-dss'</c> but more algorithms
-	can be handled.</d>
+	<d>Host key algorithm.</d>
 
 	<v>ConnectOptions = proplists:proplist()</v>
-	<d>Options provided to <seealso marker="ssh#connect-3">ssh:connect/[3,4]</seealso></d>
+	<d>Options provided to <seealso marker="ssh#connect-3">ssh:connect/[3,4]</seealso>. The option list given in
+	the <c>key_cb</c> option is available with the key <c>key_cb_private</c>.</d>
 
 	<v>PrivateKey = private_key()</v>
 	<d>Private key of the user matching the <c>Algorithm</c>.</d>
diff --git a/lib/ssh/doc/src/ssh_connection.xml b/lib/ssh/doc/src/ssh_connection.xml
index 150d46a9a2..72830de04d 100644
--- a/lib/ssh/doc/src/ssh_connection.xml
+++ b/lib/ssh/doc/src/ssh_connection.xml
@@ -428,7 +428,7 @@
     </func>
     
     <func>
-      <name>shell(ConnectionRef, ChannelId) -> ssh_request_status() | {error, closed}
+      <name>shell(ConnectionRef, ChannelId) -> ok | failure | {error, closed}
       </name>
       <fsummary>Requests that the user default shell (typically defined in
       /etc/passwd in Unix systems) is to be executed at the server end.</fsummary>
@@ -440,6 +440,10 @@
 	 <p>Is to be called by a client channel process to request that the user default
 	 shell (typically defined in /etc/passwd in Unix systems) is executed
 	 at the server end.</p>
+	 <p>Note: the return value is <c>ok</c> instead of <c>success</c> unlike in other
+	 functions in this module. This is a fault that was introduced so long ago that
+	 any change would break a large number of existing software.
+	 </p>
        </desc>
     </func>
 
diff --git a/lib/ssh/doc/src/ssh_server_key_api.xml b/lib/ssh/doc/src/ssh_server_key_api.xml
index a0694ca8d9..c6808b95d1 100644
--- a/lib/ssh/doc/src/ssh_server_key_api.xml
+++ b/lib/ssh/doc/src/ssh_server_key_api.xml
@@ -57,11 +57,17 @@
       <tag><c>string() =</c></tag>
       <item><p><c>[byte()]</c></p></item>
       <tag><c>public_key() =</c></tag>
-      <item><p><c>#'RSAPublicKey'{}| {integer(),  #'Dss-Parms'{}}| term()</c></p></item>
+      <item><p><c>#'RSAPublicKey'{} 
+      | {integer(),#'Dss-Parms'{}} 
+      | {#'ECPoint'{},{namedCurve,Curve::string()}}</c></p></item>
       <tag><c>private_key() =</c></tag>
-      <item><p><c>#'RSAPrivateKey'{} | #'DSAPrivateKey'{} | term()</c></p></item>
+      <item><p><c>#'RSAPrivateKey'{} 
+      | #'DSAPrivateKey'{} 
+      | #'ECPrivateKey'{}</c></p></item>      
       <tag><c>public_key_algorithm() =</c></tag>
-      <item><p><c>'ssh-rsa'| 'ssh-dss' | atom()</c></p></item>
+      <item><p><c>'ssh-rsa' | 'ssh-dss' 
+      | 'rsa-sha2-256' | 'rsa-sha2-384' | 'rsa-sha2-512'
+      | 'ecdsa-sha2-nistp256' | 'ecdsa-sha2-nistp384' | 'ecdsa-sha2-nistp521' </c></p></item>
     </taglist>
   </section>
   
@@ -72,12 +78,13 @@
       <fsummary>Fetches the host’s private key.</fsummary>
       <type>
 	<v>Algorithm = public_key_algorithm()</v>
-	<d>Host key algorithm. Is to support <c>'ssh-rsa' | 'ssh-dss'</c>, but more algorithms
-	can be handled.</d>
+	<d>Host key algorithm.</d>
 	<v>DaemonOptions = proplists:proplist()</v>
-	<d>Options provided to <seealso marker="ssh#daemon-2">ssh:daemon/[2,3]</seealso>.</d>
-	<v>Key = private_key()</v>
-	<d>Private key of the host matching the <c>Algorithm</c>.</d>
+	<d>Options provided to <seealso marker="ssh#daemon-2">ssh:daemon/[2,3]</seealso>. The option list given in
+	the <c>key_cb</c> option is available with the key <c>key_cb_private</c>.</d>
+	<v>Key = private_key() | crypto:engine_key_ref()</v>
+	<d>Private key of the host matching the <c>Algorithm</c>.
+	It may be a reference to a 'ssh-rsa', rsa-sha2-* or 'ssh-dss' (NOT ecdsa) key stored in a loaded Engine.</d>
 	<v>Reason = term()</v>
       </type>
       <desc>
@@ -90,11 +97,12 @@
       <fsummary>Checks if the user key is authorized.</fsummary>
       <type>
 	<v>Key = public_key()</v>
-	<d>Normally an RSA or DSA public key, but handling of other public keys can be added</d>
+	<d>Normally an RSA, DSA or ECDSA public key, but handling of other public keys can be added</d>
 	<v>User = string()</v>
 	<d>User owning the public key.</d>
 	<v>DaemonOptions = proplists:proplist()</v>
-	<d>Options provided to  <seealso marker="ssh#daemon-2">ssh:daemon/[2,3]</seealso>.</d>
+	<d>Options provided to <seealso marker="ssh#daemon-2">ssh:daemon/[2,3]</seealso>. The option list given in
+	the <c>key_cb</c> option is available with the key <c>key_cb_private</c>.</d>
 	<v>Result = boolean()</v>
       </type>
       <desc>
diff --git a/lib/ssh/doc/src/ssh_sftp.xml b/lib/ssh/doc/src/ssh_sftp.xml
index ed7fbf9cf3..129426a6d5 100644
--- a/lib/ssh/doc/src/ssh_sftp.xml
+++ b/lib/ssh/doc/src/ssh_sftp.xml
@@ -464,11 +464,16 @@
         <v>FileInfo = record()</v>
       </type>
       <desc>
-        <p>Returns a <c><![CDATA[file_info]]></c> record from the file specified by
+        <p>Returns a <c><![CDATA[file_info]]></c> record from the file system object specified by
           <c><![CDATA[Name]]></c> or <c><![CDATA[Handle]]></c>. See
 	<seealso marker="kernel:file#read_file_info-2">file:read_file_info/2</seealso>
 	for information about the record.
 	</p>
+	<p>
+	  Depending on the underlying OS:es links might be followed and info on the final file, directory
+	  etc is returned. See <seealso marker="#read_link_info-2">ssh_sftp::read_link_info/2</seealso>
+	  on how to get information on links instead.
+	</p>
       </desc>
     </func>
 
diff --git a/lib/ssh/src/ssh.app.src b/lib/ssh/src/ssh.app.src
index 974292fde1..4a22322333 100644
--- a/lib/ssh/src/ssh.app.src
+++ b/lib/ssh/src/ssh.app.src
@@ -42,10 +42,10 @@
   {env, []},
   {mod, {ssh_app, []}},
   {runtime_dependencies, [
-			  "crypto-3.7.3",
+			  "crypto-4.2",
 			  "erts-6.0",
 			  "kernel-3.0",
-			  "public_key-1.4",
+			  "public_key-1.5.2",
 			  "stdlib-3.3"
 			 ]}]}.
 
diff --git a/lib/ssh/src/ssh.erl b/lib/ssh/src/ssh.erl
index 1a5d48baca..25d537c624 100644
--- a/lib/ssh/src/ssh.erl
+++ b/lib/ssh/src/ssh.erl
@@ -184,10 +184,10 @@ channel_info(ConnectionRef, ChannelId, Options) ->
 daemon(Port) ->
     daemon(Port, []).
 
-
 daemon(Socket, UserOptions) when is_port(Socket) ->
     try
         #{} = Options = ssh_options:handle_options(server, UserOptions),
+
         case valid_socket_to_use(Socket, ?GET_OPT(transport,Options)) of
             ok ->
                 {ok, {IP,Port}} = inet:sockname(Socket),
@@ -266,8 +266,6 @@ daemon(Host0, Port0, UserOptions0) when 0 =< Port0, Port0 =< 65535,
 daemon(_, _, _) ->
     {error, badarg}.
 
-
-
 %%--------------------------------------------------------------------
 -spec daemon_info(daemon_ref()) -> ok_error( [{atom(), term()}] ).
 
@@ -461,6 +459,9 @@ open_listen_socket(_Host0, Port0, Options0) ->
 %%%----------------------------------------------------------------
 finalize_start(Host, Port, Profile, Options0, F) ->
     try
+        %% throws error:Error if no usable hostkey is found
+        ssh_connection_handler:available_hkey_algorithms(server, Options0),
+
         sshd_sup:start_child(Host, Port, Profile, Options0)
     of
         {error, {already_started, _}} ->
@@ -470,6 +471,8 @@ finalize_start(Host, Port, Profile, Options0, F) ->
         Result = {ok,_} ->
             F(Options0, Result)
     catch
+        error:{shutdown,Err} ->
+            {error,Err};
         exit:{noproc, _} ->
             {error, ssh_not_started}
     end.
diff --git a/lib/ssh/src/ssh.hrl b/lib/ssh/src/ssh.hrl
index d6d412db43..8d950eea3c 100644
--- a/lib/ssh/src/ssh.hrl
+++ b/lib/ssh/src/ssh.hrl
@@ -35,6 +35,8 @@
 
 -define(DEFAULT_TRANSPORT,  {tcp, gen_tcp, tcp_closed} ).
 
+-define(DEFAULT_SHELL, {shell, start, []} ).
+
 -define(MAX_RND_PADDING_LEN, 15).
 
 -define(SUPPORTED_AUTH_METHODS, "publickey,keyboard-interactive,password").
@@ -63,8 +65,8 @@
 -define(uint16(X), << ?UINT16(X) >> ).
 -define(uint32(X), << ?UINT32(X) >> ).
 -define(uint64(X), << ?UINT64(X) >> ).
--define(string(X), << ?STRING(list_to_binary(X)) >> ).
 -define(string_utf8(X), << ?STRING(unicode:characters_to_binary(X)) >> ).
+-define(string(X), ?string_utf8(X)).
 -define(binary(X), << ?STRING(X) >>).
 
 %% Cipher details
@@ -112,7 +114,7 @@
                              | {mac, double_algs()}
                              | {compression, double_algs()} .
 -type simple_algs()         :: list( atom() ) .
--type double_algs()         :: list( {client2serverlist,simple_algs()} | {server2client,simple_algs()} )
+-type double_algs()         :: list( {client2server,simple_algs()} | {server2client,simple_algs()} )
                              | simple_algs() .
 
 -type options() :: #{socket_options   := socket_options(),
diff --git a/lib/ssh/src/ssh_acceptor.erl b/lib/ssh/src/ssh_acceptor.erl
index d66a34c58a..27d4242dd4 100644
--- a/lib/ssh/src/ssh_acceptor.erl
+++ b/lib/ssh/src/ssh_acceptor.erl
@@ -86,7 +86,8 @@ acceptor_init(Parent, Port, Address, Opts, AcceptTimeout) ->
                     acceptor_loop(Callback, Port, Address, Opts, LSock, AcceptTimeout);
 
                 {error,_} -> % Not open, a restart
-                    {ok,NewLSock} = listen(Port, Opts),
+                    %% Allow gen_tcp:listen to fail 4 times if eaddrinuse:
+                    {ok,NewLSock} = try_listen(Port, Opts, 4),
                     proc_lib:init_ack(Parent, {ok, self()}),
                     Opts1 = ?DELETE_INTERNAL_OPT(lsocket, Opts),
                     {_, Callback, _} =  ?GET_OPT(transport, Opts1),
@@ -98,6 +99,19 @@ acceptor_init(Parent, Port, Address, Opts, AcceptTimeout) ->
     end.
 
 
+try_listen(Port, Opts, NtriesLeft) ->
+    try_listen(Port, Opts, 1, NtriesLeft).
+
+try_listen(Port, Opts, N, Nmax) ->
+    case listen(Port, Opts) of
+        {error,eaddrinuse} when N<Nmax ->
+            timer:sleep(10*N), % Sleep 10, 20, 30,... ms
+            try_listen(Port, Opts, N+1, Nmax);
+        Other ->
+            Other
+    end.
+
+
 request_ownership(LSock, SockOwner) ->
     SockOwner ! {request_control,LSock,self()},
     receive
diff --git a/lib/ssh/src/ssh_acceptor_sup.erl b/lib/ssh/src/ssh_acceptor_sup.erl
index a24664793b..fc564a359b 100644
--- a/lib/ssh/src/ssh_acceptor_sup.erl
+++ b/lib/ssh/src/ssh_acceptor_sup.erl
@@ -86,10 +86,7 @@ child_spec(Address, Port, Profile, Options) ->
     Timeout = ?GET_INTERNAL_OPT(timeout, Options, ?DEFAULT_TIMEOUT),
     #{id       => id(Address, Port, Profile),
       start    => {ssh_acceptor, start_link, [Port, Address, Options, Timeout]},
-      restart  => transient,
-      shutdown => 5500, %brutal_kill,
-      type     => worker,
-      modules  => [ssh_acceptor]
+      restart  => transient % because a crashed listener could be replaced by a new one
      }.
 
 id(Address, Port, Profile) ->
diff --git a/lib/ssh/src/ssh_auth.erl b/lib/ssh/src/ssh_auth.erl
index ac64a7bf14..03d264745b 100644
--- a/lib/ssh/src/ssh_auth.erl
+++ b/lib/ssh/src/ssh_auth.erl
@@ -145,14 +145,17 @@ get_public_key(SigAlg, #ssh{opts = Opts}) ->
     case KeyCb:user_key(KeyAlg, [{key_cb_private,KeyCbOpts}|UserOpts]) of
         {ok, PrivKey} ->
             try
+                %% Check the key - the KeyCb may be a buggy plugin
+                true = ssh_transport:valid_key_sha_alg(PrivKey, KeyAlg),
                 Key = ssh_transport:extract_public_key(PrivKey),
                 public_key:ssh_encode(Key, ssh2_pubkey)
             of
                 PubKeyBlob -> {ok,{PrivKey,PubKeyBlob}}
             catch
                 _:_ -> 
-		    not_ok
+                    not_ok
             end;
+
 	_Error ->
 	    not_ok
     end.
@@ -301,11 +304,10 @@ handle_userauth_request(#ssh_msg_userauth_request{user = User,
 							   SigWLen/binary>>
 						 }, 
 			SessionId, 
-			#ssh{opts = Opts,
-			     userauth_supported_methods = Methods} = Ssh) ->
+			#ssh{userauth_supported_methods = Methods} = Ssh) ->
     
     case verify_sig(SessionId, User, "ssh-connection", 
-		    BAlg, KeyBlob, SigWLen, Opts) of
+		    BAlg, KeyBlob, SigWLen, Ssh) of
 	true ->
 	    {authorized, User, 
 	     ssh_transport:ssh_packet(
@@ -515,7 +517,7 @@ pre_verify_sig(User, KeyBlob, Opts) ->
 	    false
     end.
 
-verify_sig(SessionId, User, Service, AlgBin, KeyBlob, SigWLen, Opts) ->
+verify_sig(SessionId, User, Service, AlgBin, KeyBlob, SigWLen, #ssh{opts = Opts} = Ssh) ->
     try
         Alg = binary_to_list(AlgBin),
         {KeyCb,KeyCbOpts} = ?GET_OPT(key_cb, Opts),
@@ -526,7 +528,7 @@ verify_sig(SessionId, User, Service, AlgBin, KeyBlob, SigWLen, Opts) ->
         <<?UINT32(AlgSigLen), AlgSig:AlgSigLen/binary>> = SigWLen,
         <<?UINT32(AlgLen), _Alg:AlgLen/binary,
           ?UINT32(SigLen), Sig:SigLen/binary>> = AlgSig,
-        ssh_transport:verify(PlainText, ssh_transport:sha(Alg), Sig, Key)
+        ssh_transport:verify(PlainText, ssh_transport:sha(Alg), Sig, Key, Ssh)
     catch
 	_:_ ->
 	    false
diff --git a/lib/ssh/src/ssh_channel_sup.erl b/lib/ssh/src/ssh_channel_sup.erl
index 6b01dc334d..8444533fd1 100644
--- a/lib/ssh/src/ssh_channel_sup.erl
+++ b/lib/ssh/src/ssh_channel_sup.erl
@@ -26,7 +26,7 @@
 
 -behaviour(supervisor).
 
--export([start_link/1, start_child/2]).
+-export([start_link/1, start_child/5]).
 
 %% Supervisor callback
 -export([init/1]).
@@ -37,7 +37,14 @@
 start_link(Args) ->
     supervisor:start_link(?MODULE, [Args]).
 
-start_child(Sup, ChildSpec) ->
+start_child(Sup, Callback, Id, Args, Exec) ->
+    ChildSpec =
+        #{id       => make_ref(),
+          start    => {ssh_channel, start_link, [self(), Id, Callback, Args, Exec]},
+          restart  => temporary,
+          type     => worker,
+          modules  => [ssh_channel]
+         },
     supervisor:start_child(Sup, ChildSpec).
 
 %%%=========================================================================
diff --git a/lib/ssh/src/ssh_cli.erl b/lib/ssh/src/ssh_cli.erl
index 62854346b0..783f2f80c0 100644
--- a/lib/ssh/src/ssh_cli.erl
+++ b/lib/ssh/src/ssh_cli.erl
@@ -118,31 +118,52 @@ handle_ssh_msg({ssh_cm, ConnectionHandler,
     write_chars(ConnectionHandler, ChannelId, Chars),
     {ok, State#state{pty = Pty, buf = NewBuf}};
 
-handle_ssh_msg({ssh_cm, ConnectionHandler,
-	    {shell, ChannelId, WantReply}}, State) ->
+handle_ssh_msg({ssh_cm, ConnectionHandler,  {shell, ChannelId, WantReply}}, State) ->
     NewState = start_shell(ConnectionHandler, State),
-    ssh_connection:reply_request(ConnectionHandler, WantReply,
-				 success, ChannelId),
+    ssh_connection:reply_request(ConnectionHandler, WantReply, success, ChannelId),
     {ok, NewState#state{channel = ChannelId,
 			cm = ConnectionHandler}};
 
-handle_ssh_msg({ssh_cm, ConnectionHandler,
-		{exec, ChannelId, WantReply, Cmd}}, #state{exec=undefined} = State) ->
-    {Reply, Status} = exec(Cmd),
-    write_chars(ConnectionHandler,
-		ChannelId, io_lib:format("~p\n", [Reply])),
-    ssh_connection:reply_request(ConnectionHandler, WantReply,
-				 success, ChannelId),
-    ssh_connection:exit_status(ConnectionHandler, ChannelId, Status),
-    ssh_connection:send_eof(ConnectionHandler, ChannelId),
-    {stop, ChannelId, State#state{channel = ChannelId, cm = ConnectionHandler}};
-handle_ssh_msg({ssh_cm, ConnectionHandler,
-		{exec, ChannelId, WantReply, Cmd}}, State) ->
-    NewState = start_shell(ConnectionHandler, Cmd, State),
-    ssh_connection:reply_request(ConnectionHandler, WantReply,
-				 success, ChannelId),
-    {ok, NewState#state{channel = ChannelId,
-			cm = ConnectionHandler}};
+handle_ssh_msg({ssh_cm, ConnectionHandler,  {exec, ChannelId, WantReply, Cmd}}, S0) ->
+    case
+        case S0#state.exec of
+            {direct,F} ->
+                %% Exec called and a Fun or MFA is defined to use.  The F returns the
+                %% value to return.
+                exec_direct(ConnectionHandler, F, Cmd);
+
+            undefined when S0#state.shell == ?DEFAULT_SHELL ->
+                %% Exec called and the shell is the default shell (= Erlang shell).
+                %% To be exact, eval the term as an Erlang term (but not using the
+                %% ?DEFAULT_SHELL directly). This disables banner, prompts and such.
+                exec_in_erlang_default_shell(Cmd);
+
+            undefined ->
+                %% Exec called, but the a shell other than the default shell is defined.
+                %% No new exec shell is defined, so don't execute!
+                %% We don't know if it is intended to use the new shell or not.
+                {"Prohibited.", 255, 1};
+
+            _ ->
+                %% Exec called and a Fun or MFA is defined to use.  The F communicates via
+                %% standard io:write/read.
+                %% Kept for compatibility.
+                S1 = start_exec_shell(ConnectionHandler, Cmd, S0),
+                ssh_connection:reply_request(ConnectionHandler, WantReply, success, ChannelId),
+                {ok, S1}
+        end
+    of
+        {Reply, Status, Type} ->
+            write_chars(ConnectionHandler, ChannelId, Type, Reply),
+            ssh_connection:reply_request(ConnectionHandler, WantReply, success, ChannelId),
+            ssh_connection:exit_status(ConnectionHandler, ChannelId, Status),
+            ssh_connection:send_eof(ConnectionHandler, ChannelId),
+            {stop, ChannelId, S0#state{channel = ChannelId, cm = ConnectionHandler}};
+            
+        {ok, S} ->
+            {ok, S#state{channel = ChannelId,
+                         cm = ConnectionHandler}}
+    end;
 
 handle_ssh_msg({ssh_cm, _ConnectionHandler, {eof, _ChannelId}}, State) ->
     {ok, State};
@@ -249,35 +270,7 @@ to_group(Data, Group) ->
     end,
     to_group(Tail, Group).
 
-exec(Cmd) ->
-    case eval(parse(scan(Cmd))) of
-	{error, _} ->
-	    {Cmd, 0}; %% This should be an external call
-	Term ->
-	    Term
-    end.
-
-scan(Cmd) ->
-    erl_scan:string(Cmd). 
-
-parse({ok, Tokens, _}) ->
-    erl_parse:parse_exprs(Tokens);
-parse(Error) ->
-    Error.
-
-eval({ok, Expr_list}) ->
-    case (catch erl_eval:exprs(Expr_list,
- 			       erl_eval:new_bindings())) of
- 	{value, Value, _NewBindings} ->
- 	    {Value, 0};
- 	{'EXIT', {Error, _}} -> 
- 	    {Error, -1};
- 	Error -> 
- 	    {Error, -1}
-    end;
-eval(Error) ->
-    {Error, -1}.
-
+%%--------------------------------------------------------------------
 %%% io_request, handle io requests from the user process,
 %%% Note, this is not the real I/O-protocol, but the mockup version
 %%% used between edlin and a user_driver. The protocol tags are
@@ -453,11 +446,14 @@ move_cursor(From, To, #ssh_pty{width=Width, term=Type}) ->
 %% %%% make sure that there is data to send
 %% %%% before calling ssh_connection:send
 write_chars(ConnectionHandler, ChannelId, Chars) ->
+    write_chars(ConnectionHandler, ChannelId, ?SSH_EXTENDED_DATA_DEFAULT, Chars).
+
+write_chars(ConnectionHandler, ChannelId, Type, Chars) ->
     case has_chars(Chars) of
         false -> ok;
         true -> ssh_connection:send(ConnectionHandler,
                                     ChannelId,
-                                    ?SSH_EXTENDED_DATA_DEFAULT,
+                                    Type,
                                     Chars)
     end.
 
@@ -493,53 +489,130 @@ bin_to_list(L) when is_list(L) ->
 bin_to_list(I) when is_integer(I) ->
     I.
 
+
+%%--------------------------------------------------------------------
 start_shell(ConnectionHandler, State) ->
-    Shell = State#state.shell,
-    ConnectionInfo = ssh_connection_handler:connection_info(ConnectionHandler,
-						  [peer, user]),
-    ShellFun = case is_function(Shell) of
-		   true ->
-		       User = proplists:get_value(user, ConnectionInfo),
-		       case erlang:fun_info(Shell, arity) of
-			   {arity, 1} ->
-			       fun() -> Shell(User) end;
-			   {arity, 2} ->
-			       {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo),
-			       fun() -> Shell(User, PeerAddr) end;
-			   _ ->
-			       Shell
-		       end;
-		   _ ->
-		       Shell
-	       end,
-    Echo = get_echo(State#state.pty),
-    Group = group:start(self(), ShellFun, [{echo, Echo}]),
-    State#state{group = Group, buf = empty_buf()}.
-
-start_shell(_ConnectionHandler, Cmd, #state{exec={M, F, A}} = State) ->
-    Group = group:start(self(), {M, F, A++[Cmd]}, [{echo, false}]),
-    State#state{group = Group, buf = empty_buf()};
-start_shell(ConnectionHandler, Cmd, #state{exec=Shell} = State) when is_function(Shell) ->
-
-    ConnectionInfo = ssh_connection_handler:connection_info(ConnectionHandler,
-						 [peer, user]),
-    User = proplists:get_value(user, ConnectionInfo),
-    ShellFun = 
-	case erlang:fun_info(Shell, arity) of
-	    {arity, 1} ->
-		fun() -> Shell(Cmd) end;
-	    {arity, 2} ->
-		fun() -> Shell(Cmd, User) end;
-	    {arity, 3} ->
-		{_, PeerAddr} = proplists:get_value(peer, ConnectionInfo),
-		fun() -> Shell(Cmd, User, PeerAddr) end;
-	    _ ->
-		Shell
-	end,
-    Echo = get_echo(State#state.pty),
-    Group = group:start(self(), ShellFun, [{echo,Echo}]),
-    State#state{group = Group, buf = empty_buf()}.
+    ShellSpawner =
+        case State#state.shell of
+            Shell when is_function(Shell, 1) ->
+                [{user,User}] = ssh_connection_handler:connection_info(ConnectionHandler, [user]),
+                fun() -> Shell(User) end;
+            Shell when is_function(Shell, 2) ->
+                ConnectionInfo =
+                    ssh_connection_handler:connection_info(ConnectionHandler, [peer, user]),
+                User = proplists:get_value(user, ConnectionInfo),
+                {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo),
+                fun() -> Shell(User, PeerAddr) end;
+            {_,_,_} = Shell ->
+                Shell
+        end,
+    State#state{group = group:start(self(), ShellSpawner, [{echo, get_echo(State#state.pty)}]),
+                buf = empty_buf()}.
+
+%%--------------------------------------------------------------------
+start_exec_shell(ConnectionHandler, Cmd, State) ->
+    ExecShellSpawner =
+        case State#state.exec of
+            ExecShell when is_function(ExecShell, 1) ->
+                fun() -> ExecShell(Cmd) end;
+            ExecShell when is_function(ExecShell, 2) ->
+                [{user,User}] = ssh_connection_handler:connection_info(ConnectionHandler, [user]),
+                fun() -> ExecShell(Cmd, User) end;
+            ExecShell when is_function(ExecShell, 3) ->
+                ConnectionInfo =
+                    ssh_connection_handler:connection_info(ConnectionHandler, [peer, user]),
+                User = proplists:get_value(user, ConnectionInfo),
+                {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo),
+                fun() -> ExecShell(Cmd, User, PeerAddr) end;
+            {M,F,A} ->
+                {M, F, A++[Cmd]}
+        end,
+    State#state{group = group:start(self(), ExecShellSpawner, [{echo,false}]),
+                buf = empty_buf()}.
+
+%%--------------------------------------------------------------------
+exec_in_erlang_default_shell(Cmd) ->
+    case eval(parse(scan(Cmd))) of
+	{ok, Term} ->
+            {io_lib:format("~p\n", [Term]), 0, 0};
+        {error, Error} when is_atom(Error) ->
+            {io_lib:format("Error in ~p: ~p\n", [Cmd,Error]), -1, 1};
+        _ ->
+            {io_lib:format("Error: ~p\n", [Cmd]), -1, 1}
+    end.
+
+scan(Cmd) ->
+    erl_scan:string(Cmd). 
+
+parse({ok, Tokens, _}) ->
+    erl_parse:parse_exprs(Tokens);
+parse(Error) ->
+    Error.
+
+eval({ok, Expr_list}) ->
+    case (catch erl_eval:exprs(Expr_list,
+                              erl_eval:new_bindings())) of
+        {value, Value, _NewBindings} ->
+            {ok, Value};
+        {'EXIT', {Error, _}} -> 
+            {error, Error};
+        {error, Error} -> 
+            {error, Error};
+        Error -> 
+            {error, Error}
+    end;
+eval({error,Error}) ->
+    {error, Error};
+eval(Error) ->
+    {error, Error}.
+
+%%--------------------------------------------------------------------
+exec_direct(ConnectionHandler, ExecSpec, Cmd) ->
+    try
+        case ExecSpec of
+            _ when is_function(ExecSpec, 1) ->
+                ExecSpec(Cmd);
+            _ when is_function(ExecSpec, 2) ->
+                [{user,User}] = ssh_connection_handler:connection_info(ConnectionHandler, [user]),
+                ExecSpec(Cmd, User);
+            _ when is_function(ExecSpec, 3) ->
+                ConnectionInfo =
+                    ssh_connection_handler:connection_info(ConnectionHandler, [peer, user]),
+                User = proplists:get_value(user, ConnectionInfo),
+                {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo),
+                ExecSpec(Cmd, User, PeerAddr)
+        end
+    of
+        Reply ->
+            return_direct_exec_reply(Reply, Cmd)
+    catch
+        C:Error ->
+            {io_lib:format("Error in \"~s\": ~p ~p~n", [Cmd,C,Error]), -1, 1}
+    end.
+
+
+
+return_direct_exec_reply(Reply, Cmd) ->
+    case fmt_exec_repl(Reply) of
+        {ok,S} ->
+            {S, 0, 0};
+        {error,S} ->
+            {io_lib:format("Error in \"~s\": ~s~n", [Cmd,S]), -1, 1}
+    end.
+
+fmt_exec_repl({T,A}) when T==ok ; T==error ->
+    try
+        {T, io_lib:format("~s",[A])}
+    catch
+        error:badarg ->
+            {T, io_lib:format("~p", [A])};
+        C:Err ->
+            {error, io_lib:format("~p:~p~n",[C,Err])}
+    end;
+fmt_exec_repl(Other) ->
+    {error, io_lib:format("Bad exec-plugin return: ~p",[Other])}.
 
+%%--------------------------------------------------------------------
 % Pty can be undefined if the client never sets any pty options before
 % starting the shell.
 get_echo(undefined) ->
diff --git a/lib/ssh/src/ssh_connection.erl b/lib/ssh/src/ssh_connection.erl
index 7e9ee78fd2..946ae2967b 100644
--- a/lib/ssh/src/ssh_connection.erl
+++ b/lib/ssh/src/ssh_connection.erl
@@ -812,22 +812,20 @@ start_channel(Cb, Id, Args, SubSysSup, Opts) ->
     start_channel(Cb, Id, Args, SubSysSup, undefined, Opts).
 
 start_channel(Cb, Id, Args, SubSysSup, Exec, Opts) ->
-    ChildSpec = child_spec(Cb, Id, Args, Exec),
     ChannelSup = ssh_subsystem_sup:channel_supervisor(SubSysSup),
-    assert_limit_num_channels_not_exceeded(ChannelSup, Opts),
-    ssh_channel_sup:start_child(ChannelSup, ChildSpec).
+    case max_num_channels_not_exceeded(ChannelSup, Opts) of
+        true ->
+            ssh_channel_sup:start_child(ChannelSup, Cb, Id, Args, Exec);
+        false ->
+	    throw(max_num_channels_exceeded)
+    end.
     
-assert_limit_num_channels_not_exceeded(ChannelSup, Opts) ->
+max_num_channels_not_exceeded(ChannelSup, Opts) ->
     MaxNumChannels = ?GET_OPT(max_channels, Opts),
     NumChannels = length([x || {_,_,worker,[ssh_channel]} <- 
 				   supervisor:which_children(ChannelSup)]),
-    if 
-	%% Note that NumChannels is BEFORE starting a new one
-	NumChannels < MaxNumChannels ->
-	    ok;
-	true ->
-	    throw(max_num_channels_exceeded)
-    end.
+    %% Note that NumChannels is BEFORE starting a new one
+    NumChannels < MaxNumChannels.
 
 %%--------------------------------------------------------------------
 %%% Internal functions
@@ -874,14 +872,6 @@ check_subsystem(SsName, Options) ->
 	    Value
     end.
 
-child_spec(Callback, Id, Args, Exec) ->
-    Name = make_ref(),
-    StartFunc = {ssh_channel, start_link, [self(), Id, Callback, Args, Exec]},
-    Restart = temporary, 
-    Shutdown = 3600,
-    Type = worker,
-    {Name, StartFunc, Restart, Shutdown, Type, [ssh_channel]}.
-
 start_cli(#connection{cli_spec = no_cli}, _) ->
     {error, cli_disabled};
 start_cli(#connection{options = Options,
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index 4158a52a27..852e70d9e2 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -46,6 +46,7 @@
 
 %%% Internal application API
 -export([start_connection/4,
+         available_hkey_algorithms/2,
 	 open_channel/6,
 	 request/6, request/7,
 	 reply_request/3, 
@@ -324,23 +325,32 @@ renegotiate_data(ConnectionHandler) ->
 %% Internal process state
 %%====================================================================
 -record(data, {
-	  starter                               :: pid(),
+	  starter                               :: pid()
+						 | undefined,
 	  auth_user                             :: string()
 						 | undefined,
 	  connection_state                      :: #connection{},
-	  latest_channel_id         = 0         :: non_neg_integer(),
+	  latest_channel_id         = 0         :: non_neg_integer()
+                                                 | undefined,
 	  idle_timer_ref                        :: undefined 
 						 | infinity
 						 | reference(),
 	  idle_timer_value          = infinity  :: infinity
 						 | pos_integer(),
-	  transport_protocol                    :: atom(),	% ex: tcp
-	  transport_cb                          :: atom(),	% ex: gen_tcp
-	  transport_close_tag                   :: atom(),	% ex: tcp_closed
-	  ssh_params                            :: #ssh{},
-	  socket                                :: inet:socket(),
-	  decrypted_data_buffer     = <<>>      :: binary(),
-	  encrypted_data_buffer     = <<>>      :: binary(),
+	  transport_protocol                    :: atom()
+                                                 | undefined,	% ex: tcp
+	  transport_cb                          :: atom()
+                                                 | undefined,	% ex: gen_tcp
+	  transport_close_tag                   :: atom()
+                                                 | undefined,	% ex: tcp_closed
+	  ssh_params                            :: #ssh{}
+                                                 | undefined,
+	  socket                                :: inet:socket()
+                                                 | undefined,
+	  decrypted_data_buffer     = <<>>      :: binary()
+                                                 | undefined,
+	  encrypted_data_buffer     = <<>>      :: binary()
+                                                 | undefined,
 	  undecrypted_packet_length             :: undefined | non_neg_integer(),
 	  key_exchange_init_msg                 :: #ssh_msg_kexinit{}
 						 | undefined,
@@ -369,16 +379,17 @@ init_connection_handler(Role, Socket, Opts) ->
                                   StartState,
                                   D);
 
-        {stop, enotconn} ->
-	    %% Handles the abnormal sequence:
-	    %%    SYN->
-	    %%            <-SYNACK
-	    %%    ACK->
-	    %%    RST->
-	    exit({shutdown, "TCP connection to server was prematurely closed by the client"});
-        
-	{stop, OtherError} ->
-	    exit({shutdown, {init,OtherError}})
+        {stop, Error} ->
+            Sups = ?GET_INTERNAL_OPT(supervisors, Opts),
+            C = #connection{system_supervisor =     proplists:get_value(system_sup,     Sups),
+                            sub_system_supervisor = proplists:get_value(subsystem_sup,  Sups),
+                            connection_supervisor = proplists:get_value(connection_sup, Sups)
+                           },
+            gen_statem:enter_loop(?MODULE,
+                                  [],
+                                  {init_error,Error},
+                                  #data{connection_state=C,
+                                        socket=Socket})
     end.
 
 
@@ -432,13 +443,12 @@ init_ssh_record(Role, Socket, Opts) ->
     init_ssh_record(Role, Socket, PeerAddr, Opts).
 
 init_ssh_record(Role, _Socket, PeerAddr, Opts) ->
-    KeyCb = ?GET_OPT(key_cb, Opts),
     AuthMethods = ?GET_OPT(auth_methods, Opts),
     S0 = #ssh{role = Role,
-	      key_cb = KeyCb,
+	      key_cb = ?GET_OPT(key_cb, Opts),
 	      opts = Opts,
 	      userauth_supported_methods = AuthMethods,
-	      available_host_keys = supported_host_keys(Role, KeyCb, Opts),
+	      available_host_keys = available_hkey_algorithms(Role, Opts),
 	      random_length_padding = ?GET_OPT(max_random_length_padding, Opts)
 	   },
 
@@ -531,6 +541,21 @@ renegotiation(_) -> false.
 callback_mode() ->
     handle_event_function.
 
+
+handle_event(_, _Event, {init_error,Error}, _) ->
+    case Error of
+        enotconn ->
+           %% Handles the abnormal sequence:
+           %%    SYN->
+           %%            <-SYNACK
+           %%    ACK->
+           %%    RST->
+            {stop, {shutdown,"TCP connenction to server was prematurely closed by the client"}};
+
+        OtherError ->
+            {stop, {shutdown,{init,OtherError}}}
+    end;
+
 %%% ######## {hello, client|server} ####
 %% The very first event that is sent when the we are set as controlling process of Socket
 handle_event(_, socket_control, {hello,_}, D) ->
@@ -1143,23 +1168,30 @@ handle_event({call,From}, stop, StateName, D0) ->
     {Repls,D} = send_replies(Replies, D0),
     {stop_and_reply, normal, [{reply,From,ok}|Repls], D#data{connection_state=Connection}};
 
-
 handle_event({call,_}, _, StateName, _) when not ?CONNECTED(StateName) ->
     {keep_state_and_data, [postpone]};
 
 handle_event({call,From}, {request, ChannelPid, ChannelId, Type, Data, Timeout}, StateName, D0) 
   when ?CONNECTED(StateName) ->
-    D = handle_request(ChannelPid, ChannelId, Type, Data, true, From, D0),
-    %% Note reply to channel will happen later when reply is recived from peer on the socket
-    start_channel_request_timer(ChannelId, From, Timeout),
-    {keep_state, cache_request_idle_timer_check(D)};
+    case handle_request(ChannelPid, ChannelId, Type, Data, true, From, D0) of
+        {error,Error} ->
+            {keep_state, D0, {reply,From,{error,Error}}};
+        D ->
+            %% Note reply to channel will happen later when reply is recived from peer on the socket
+            start_channel_request_timer(ChannelId, From, Timeout),
+            {keep_state, cache_request_idle_timer_check(D)}
+    end;
 
 handle_event({call,From}, {request, ChannelId, Type, Data, Timeout}, StateName, D0) 
   when ?CONNECTED(StateName) ->
-    D = handle_request(ChannelId, Type, Data, true, From, D0),
-    %% Note reply to channel will happen later when reply is recived from peer on the socket
-    start_channel_request_timer(ChannelId, From, Timeout),
-    {keep_state, cache_request_idle_timer_check(D)};
+    case handle_request(ChannelId, Type, Data, true, From, D0) of
+        {error,Error} ->
+            {keep_state, D0, {reply,From,{error,Error}}};
+        D ->
+            %% Note reply to channel will happen later when reply is recived from peer on the socket
+            start_channel_request_timer(ChannelId, From, Timeout),
+            {keep_state, cache_request_idle_timer_check(D)}
+    end;
 
 handle_event({call,From}, {data, ChannelId, Type, Data, Timeout}, StateName, D0) 
   when ?CONNECTED(StateName) ->
@@ -1417,38 +1449,43 @@ handle_event(Type, Ev, StateName, D) ->
 -spec terminate(any(),
 		state_name(),
 		#data{}
-	       ) -> finalize_termination_result() .
+	       ) -> term().
 			
 %% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 
 terminate(normal, StateName, State) ->
-    finalize_termination(StateName, State);
+    stop_subsystem(State),
+    close_transport(State);
 
 terminate({shutdown,{init,Reason}}, StateName, State) ->
     error_logger:info_report(io_lib:format("Erlang ssh in connection handler init: ~p~n",[Reason])),
-    finalize_termination(StateName, State);
+    stop_subsystem(State),
+    close_transport(State);
 
 terminate(shutdown, StateName, State0) ->
     %% Terminated by supervisor
     State = send_msg(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_BY_APPLICATION,
-					 description = "Application shutdown"},
-		     State0),
-    finalize_termination(StateName, State);
-
-%% terminate({shutdown,Msg}, StateName, State0) when is_record(Msg,ssh_msg_disconnect)->
-%%     State = send_msg(Msg, State0),
-%%     finalize_termination(StateName, Msg, State);
+                                         description = "Application shutdown"},
+                     State0),
+    close_transport(State);
 
 terminate({shutdown,_R}, StateName, State) ->
-    finalize_termination(StateName, State);
+    %% Internal termination
+    stop_subsystem(State),
+    close_transport(State);
+
+terminate(kill, StateName, State) ->
+    stop_subsystem(State),
+    close_transport(State);
 
 terminate(Reason, StateName, State0) ->
     %% Others, e.g  undef, {badmatch,_}
     log_error(Reason),
     State = send_msg(#ssh_msg_disconnect{code = ?SSH_DISCONNECT_BY_APPLICATION,
-					   description = "Internal error"},
+                                         description = "Internal error"},
 		     State0),
-    finalize_termination(StateName, State).
+    stop_subsystem(State),
+    close_transport(State).
 
 %%--------------------------------------------------------------------
 
@@ -1523,65 +1560,67 @@ start_the_connection_child(UserPid, Role, Socket, Options0) ->
 
 %%--------------------------------------------------------------------
 %% Stopping
--type finalize_termination_result() :: ok .
-
-finalize_termination(_StateName, #data{transport_cb = Transport,
-				       connection_state = Connection,
-				       socket = Socket}) ->
-    case Connection of
-	#connection{system_supervisor = SysSup,
-		    sub_system_supervisor = SubSysSup} when is_pid(SubSysSup) ->
-	    ssh_system_sup:stop_subsystem(SysSup, SubSysSup);
-	_ ->
-	    do_nothing
-    end,
-    (catch Transport:close(Socket)),
+
+stop_subsystem(#data{connection_state =
+                         #connection{system_supervisor = SysSup,
+                                     sub_system_supervisor = SubSysSup}}) when is_pid(SubSysSup) ->
+    ssh_system_sup:stop_subsystem(SysSup, SubSysSup);
+stop_subsystem(_) ->
     ok.
 
+
+close_transport(#data{transport_cb = Transport,
+                      socket = Socket}) ->
+    try
+        Transport:close(Socket)
+    of
+        _ -> ok
+    catch
+        _:_ -> ok
+    end.
+
 %%--------------------------------------------------------------------
 %% "Invert" the Role
 peer_role(client) -> server;
 peer_role(server) -> client.
 
 %%--------------------------------------------------------------------
-supported_host_keys(client, _, Options) ->
-    try
-        find_sup_hkeys(Options)
-    of
-	[] ->
+available_hkey_algorithms(Role, Options) ->
+    KeyCb = ?GET_OPT(key_cb, Options),
+    case [A || A <- available_hkey_algos(Options),
+               (Role==client) orelse available_host_key(KeyCb, A, Options)
+         ] of
+        
+        [] when Role==client ->
 	    error({shutdown, "No public key algs"});
-	Algs ->
-	    [atom_to_list(A) || A<-Algs]
-    catch
-	exit:Reason ->
-	    error({shutdown, Reason})
-    end;
-supported_host_keys(server, KeyCb, Options) ->
-    [atom_to_list(A) || A <- find_sup_hkeys(Options),
-			available_host_key(KeyCb, A, Options)
-    ].
 
+        [] when Role==server ->
+	    error({shutdown, "No host key available"});
 
-find_sup_hkeys(Options) ->
-    case proplists:get_value(public_key,
-                             ?GET_OPT(preferred_algorithms,Options)
-                            )
-    of
-        undefined ->
-            ssh_transport:default_algorithms(public_key);
-        L ->
-            NonSupported =  L--ssh_transport:supported_algorithms(public_key),
-            L -- NonSupported
+	Algs ->
+	    [atom_to_list(A) || A<-Algs]
     end.
 
 
+available_hkey_algos(Options) ->
+    SupAlgos = ssh_transport:supported_algorithms(public_key),
+    HKeys = proplists:get_value(public_key,
+                                ?GET_OPT(preferred_algorithms,Options)
+                               ),
+    NonSupported =  HKeys -- SupAlgos,
+    AvailableAndSupported = HKeys -- NonSupported,
+    AvailableAndSupported.
+
 
 %% Alg :: atom()
 available_host_key({KeyCb,KeyCbOpts}, Alg, Opts) ->
     UserOpts = ?GET_OPT(user_options, Opts),
     case KeyCb:host_key(Alg, [{key_cb_private,KeyCbOpts}|UserOpts]) of
-        {ok,_} -> true;
-        _ -> false
+        {ok,Key} ->
+            %% Check the key - the KeyCb may be a buggy plugin
+            ssh_transport:valid_key_sha_alg(Key, Alg);
+        _ ->
+            false
     end.
 
 
@@ -1751,21 +1790,31 @@ is_usable_user_pubkey(A, Ssh) ->
 %%%----------------------------------------------------------------
 handle_request(ChannelPid, ChannelId, Type, Data, WantReply, From, D) ->
     case ssh_channel:cache_lookup(cache(D), ChannelId) of
-	#channel{remote_id = Id} = Channel ->
+	#channel{remote_id = Id,
+                 sent_close = false} = Channel ->
 	    update_sys(cache(D), Channel, Type, ChannelPid),
 	    send_msg(ssh_connection:channel_request_msg(Id, Type, WantReply, Data),
 		     add_request(WantReply, ChannelId, From, D));
-	undefined ->
-	    D
+
+        _ when WantReply==true ->
+            {error,closed};
+
+        _ ->
+            D
     end.
 
 handle_request(ChannelId, Type, Data, WantReply, From, D) ->
     case ssh_channel:cache_lookup(cache(D), ChannelId) of
-	#channel{remote_id = Id} ->
+	#channel{remote_id = Id,
+                 sent_close = false} ->
 	    send_msg(ssh_connection:channel_request_msg(Id, Type, WantReply, Data),
 		     add_request(WantReply, ChannelId, From, D));
-	undefined ->
-	    D
+
+	_ when WantReply==true ->
+            {error,closed};
+        
+        _ ->
+            D
     end.
 
 %%%----------------------------------------------------------------
diff --git a/lib/ssh/src/ssh_connection_sup.erl b/lib/ssh/src/ssh_connection_sup.erl
index 60ee8b7c73..2e8450090a 100644
--- a/lib/ssh/src/ssh_connection_sup.erl
+++ b/lib/ssh/src/ssh_connection_sup.erl
@@ -52,10 +52,7 @@ init(_) ->
                 },
     ChildSpecs = [#{id       => undefined, % As simple_one_for_one is used.
                     start    => {ssh_connection_handler, start_link, []},
-                    restart  => temporary,
-                    shutdown => 4000,
-                    type     => worker,
-                    modules  => [ssh_connection_handler]
+                    restart  => temporary % because there is no way to restart a crashed connection
                    }
                  ],
     {ok, {SupFlags,ChildSpecs}}.
diff --git a/lib/ssh/src/ssh_dbg.erl b/lib/ssh/src/ssh_dbg.erl
index af9ad52d68..eb2c2848f3 100644
--- a/lib/ssh/src/ssh_dbg.erl
+++ b/lib/ssh/src/ssh_dbg.erl
@@ -146,7 +146,26 @@ msg_formater(msg, {trace_ts,_Pid,return_from,{ssh_message,encode,1},_Res,_TS}, D
 msg_formater(msg, {trace_ts,_Pid,call,{ssh_message,decode,_},_TS}, D) ->
     D;
 msg_formater(msg, {trace_ts,Pid,return_from,{ssh_message,decode,1},Msg,TS}, D) -> 
-    fmt("~n~s ~p RECV ~s~n", [ts(TS),Pid,wr_record(shrink_bin(Msg))], D);
+    Extra =
+        case Msg of
+            #ssh_msg_userauth_info_request{data = D0} ->
+                try ssh_message:decode_keyboard_interactive_prompts(D0, [])
+                of
+                    Acc ->
+                        io_lib:format("  -- decoded data:~n", []) ++
+                        element(1,
+                                lists:mapfoldl(
+                                  fun({Prompt,Echo}, N) ->
+                                          {io_lib:format("     prompt[~p]: \"~s\" (echo=~p)~n",[N,Prompt,Echo]), N+1}
+                                  end, 1, Acc))
+                catch
+                    _:_ ->
+                        ""
+                end;
+            _ ->
+                ""
+        end,
+    fmt("~n~s ~p RECV ~s~s~n", [ts(TS),Pid,wr_record(shrink_bin(Msg)),Extra], D);
 
 msg_formater(_auth, {trace_ts,Pid,return_from,{ssh_message,decode,1},#ssh_msg_userauth_failure{authentications=As},TS}, D) -> 
     fmt("~n~s ~p Client login FAILURE. Try ~s~n", [ts(TS),Pid,As], D);
@@ -232,21 +251,22 @@ msg_formater(_, {trace_ts,Pid,return_from, {ssh_transport,known_host_key,3}, Res
     end;
 
 msg_formater(_, {trace_ts,Pid,call,{ssh_auth,publickey_msg,[[SigAlg,#ssh{user=User}]]},TS}, D) ->
-     fmt("~n~s ~p Client will try to login user ~p with public key algorithm ~p~n", [ts(TS),Pid,User,SigAlg], D);
+     fmt("~n~s ~p Client will try to login user ~p with method: public key algorithm ~p~n", [ts(TS),Pid,User,SigAlg], D);
 msg_formater(_, {trace_ts,Pid,return_from,{ssh_auth,publickey_msg,1},{not_ok,#ssh{user=User}},TS}, D) ->
-     fmt("~s ~p User ~p can't login with that kind of public key~n", [ts(TS),Pid,User], D);
-msg_formater(_, {trace_ts,Pid,return_from,{ssh_auth,publickey_msg,1},{_,#ssh{user=User}},TS}, D) ->
-     fmt("~s ~p User ~p logged in~n", [ts(TS),Pid,User], D);
+     fmt("~s ~p User ~p can't use that kind of public key~n", [ts(TS),Pid,User], D);
+msg_formater(_, {trace_ts,_Pid,return_from,{ssh_auth,publickey_msg,1},_,_TS}, D) -> D;
 
 msg_formater(_, {trace_ts,Pid,call,{ssh_auth,password_msg,[[#ssh{user=User}]]},TS}, D) ->
-     fmt("~n~s ~p Client will try to login user ~p with password~n", [ts(TS),Pid,User], D);
+     fmt("~n~s ~p Client will try to login user ~p with method: password~n", [ts(TS),Pid,User], D);
 msg_formater(_, {trace_ts,Pid,return_from,{ssh_auth,password_msg,1},{not_ok,#ssh{user=User}},TS}, D) ->
-     fmt("~s ~p User ~p can't login with password~n", [ts(TS),Pid,User], D);
+     fmt("~s ~p User ~p can't use method password as login method~n", [ts(TS),Pid,User], D);
+msg_formater(_, {trace_ts,_Pid,return_from,{ssh_auth,password_msg,1},_Result,_TS}, D) -> D;
 
 msg_formater(_, {trace_ts,Pid,call,{ssh_auth,keyboard_interactive_msg,[[#ssh{user=User}]]},TS}, D) ->
-     fmt("~n~s ~p Client will try to login user ~p with password~n", [ts(TS),Pid,User], D);
+     fmt("~n~s ~p Client will try to login user ~p with method: keyboard-interactive~n", [ts(TS),Pid,User], D);
 msg_formater(_, {trace_ts,Pid,return_from,{ssh_auth,keyboard_interactive_msg,1},{not_ok,#ssh{user=User}},TS}, D) ->
-     fmt("~s ~p User ~p can't login with keyboard_interactive password~n", [ts(TS),Pid,User], D);
+     fmt("~s ~p User ~p can't use method keyboard-interactive as login method~n", [ts(TS),Pid,User], D);
+msg_formater(_, {trace_ts,_Pid,return_from,{ssh_auth,keyboard_interactive_msg,1},_Result,_TS}, D) -> D;
 
 msg_formater(msg, {trace_ts,Pid,send,{tcp,Sock,Bytes},Pid,TS}, D) ->
     fmt("~n~s ~p TCP SEND on ~p~n ~p~n", [ts(TS),Pid,Sock, shrink_bin(Bytes)], D);
diff --git a/lib/ssh/src/ssh_options.erl b/lib/ssh/src/ssh_options.erl
index 68c99743ee..c05293d1ae 100644
--- a/lib/ssh/src/ssh_options.erl
+++ b/lib/ssh/src/ssh_options.erl
@@ -268,17 +268,19 @@ default(server) ->
            },
 
       {shell, def} =>
-          #{default => {shell, start, []},
+          #{default => ?DEFAULT_SHELL,
             chk => fun({M,F,A}) -> is_atom(M) andalso is_atom(F) andalso is_list(A);
                       (V) -> check_function1(V) orelse check_function2(V)
                    end,
             class => user_options
            },
 
-      {exec, def} =>                 % FIXME: need some archeology....
+      {exec, def} =>
           #{default => undefined,
-            chk => fun({M,F,_}) -> is_atom(M) andalso is_atom(F);
-                      (V) -> is_function(V)
+            chk => fun({direct, V}) ->  check_function1(V) orelse check_function2(V) orelse check_function3(V);
+                      %% Compatibility (undocumented):
+                      ({M,F,A}) -> is_atom(M) andalso is_atom(F) andalso is_list(A);
+                      (V) -> check_function1(V) orelse check_function2(V) orelse check_function3(V)
                    end,
             class => user_options
            },
@@ -439,6 +441,12 @@ default(client) ->
             class => user_options
            },
 
+      {save_accepted_host, def} =>
+          #{default => true,
+            chk => fun erlang:is_boolean/1,
+            class => user_options
+           },
+
       {pref_public_key_algs, def} =>
           #{default => ssh_transport:default_algorithms(public_key),
             chk => fun check_pref_public_key_algs/1,
diff --git a/lib/ssh/src/ssh_subsystem_sup.erl b/lib/ssh/src/ssh_subsystem_sup.erl
index 8db051095c..77da240a66 100644
--- a/lib/ssh/src/ssh_subsystem_sup.erl
+++ b/lib/ssh/src/ssh_subsystem_sup.erl
@@ -74,18 +74,14 @@ ssh_connection_child_spec(Role, Address, Port, _Profile, Options) ->
     #{id       => id(Role, ssh_connection_sup, Address, Port),
       start    => {ssh_connection_sup, start_link, [Options]},
       restart  => temporary,
-      shutdown => 5000,
-      type     => supervisor,
-      modules  => [ssh_connection_sup]
+      type     => supervisor
      }.
 
 ssh_channel_child_spec(Role, Address, Port, _Profile, Options) ->
     #{id       => id(Role, ssh_channel_sup, Address, Port),
       start    => {ssh_channel_sup, start_link, [Options]},
       restart  => temporary,
-      shutdown => infinity,
-      type     => supervisor,
-      modules  => [ssh_channel_sup]
+      type     => supervisor
      }.
 
 id(Role, Sup, Address, Port) ->
diff --git a/lib/ssh/src/ssh_sup.erl b/lib/ssh/src/ssh_sup.erl
index eaec7a54e4..8183016ba5 100644
--- a/lib/ssh/src/ssh_sup.erl
+++ b/lib/ssh/src/ssh_sup.erl
@@ -36,15 +36,14 @@ init(_) ->
                  intensity =>   10,
                  period    => 3600
                 },
-    ChildSpecs = [#{id       => Module,
-                    start    => {Module, start_link, []},
-                    restart  => permanent,
-                    shutdown => 4000, %brutal_kill,
-                    type     => supervisor,
-                    modules  => [Module]
+    ChildSpecs = [#{id       => sshd_sup,
+                    start    => {sshd_sup, start_link, []},
+                    type     => supervisor
+                   },
+                  #{id       => sshc_sup,
+                    start    => {sshc_sup, start_link, []},
+                    type     => supervisor
                    }
-                  || Module <- [sshd_sup,
-                                sshc_sup]
                  ],
     {ok, {SupFlags,ChildSpecs}}.
 
diff --git a/lib/ssh/src/ssh_system_sup.erl b/lib/ssh/src/ssh_system_sup.erl
index e70abf59c2..469f9560e9 100644
--- a/lib/ssh/src/ssh_system_sup.erl
+++ b/lib/ssh/src/ssh_system_sup.erl
@@ -63,9 +63,7 @@ init([Address, Port, Profile, Options]) ->
                 [#{id       => id(ssh_acceptor_sup, Address, Port, Profile),
                    start    => {ssh_acceptor_sup, start_link, [Address, Port, Profile, Options]},
                    restart  => transient,
-                   shutdown => infinity,
-                   type     => supervisor,
-                   modules  => [ssh_acceptor_sup]
+                   type     => supervisor
                   }];
             _ ->
                 []
@@ -90,11 +88,11 @@ stop_listener(Address, Port, Profile) ->
 
 
 stop_system(SysSup) ->
-    spawn(fun() -> sshd_sup:stop_child(SysSup) end),
+    catch sshd_sup:stop_child(SysSup),
     ok.
 
 stop_system(Address, Port, Profile) ->
-    spawn(fun() -> sshd_sup:stop_child(Address, Port, Profile) end),
+    catch sshd_sup:stop_child(Address, Port, Profile),
     ok.
 
 
@@ -124,9 +122,8 @@ start_subsystem(SystemSup, Role, Address, Port, Profile, Options) ->
         #{id       => make_ref(),
           start    => {ssh_subsystem_sup, start_link, [Role, Address, Port, Profile, Options]},
           restart  => temporary,
-          shutdown => infinity,
-          type     => supervisor,
-          modules  => [ssh_subsystem_sup]},
+          type     => supervisor
+         },
     supervisor:start_child(SystemSup, SubsystemSpec).
 
 stop_subsystem(SystemSup, SubSys) ->
diff --git a/lib/ssh/src/ssh_transport.erl b/lib/ssh/src/ssh_transport.erl
index e92c727559..975053d301 100644
--- a/lib/ssh/src/ssh_transport.erl
+++ b/lib/ssh/src/ssh_transport.erl
@@ -51,10 +51,10 @@
 	 extract_public_key/1,
 	 ssh_packet/2, pack/2,
          valid_key_sha_alg/2,
-	 sha/1, sign/3, verify/4]).
+	 sha/1, sign/3, verify/5]).
 
 %%% For test suites
--export([pack/3]).
+-export([pack/3, adjust_algs_for_peer_version/2]).
 -export([decompress/2,  decrypt_blocks/3, is_valid_mac/3 ]). % FIXME: remove
 
 -define(Estring(X), ?STRING((if is_binary(X) -> X;
@@ -795,8 +795,14 @@ get_host_key(SSH, SignAlg) ->
     #ssh{key_cb = {KeyCb,KeyCbOpts}, opts = Opts} = SSH,
     UserOpts = ?GET_OPT(user_options, Opts),
     case KeyCb:host_key(SignAlg, [{key_cb_private,KeyCbOpts}|UserOpts]) of
-	{ok, PrivHostKey} ->  PrivHostKey;
-	Result -> exit({error, {Result, unsupported_key_type}})
+	{ok, PrivHostKey} ->
+            %% Check the key - the KeyCb may be a buggy plugin
+            case valid_key_sha_alg(PrivHostKey, SignAlg) of
+                true -> PrivHostKey;
+                false -> exit({error, bad_hostkey})
+            end;
+	Result ->
+            exit({error, {Result, unsupported_key_type}})
     end.
 
 extract_public_key(#'RSAPrivateKey'{modulus = N, publicExponent = E}) ->
@@ -805,13 +811,21 @@ extract_public_key(#'DSAPrivateKey'{y = Y, p = P, q = Q, g = G}) ->
     {Y,  #'Dss-Parms'{p=P, q=Q, g=G}};
 extract_public_key(#'ECPrivateKey'{parameters = {namedCurve,OID},
 				   publicKey = Q}) ->
-    {#'ECPoint'{point=Q}, {namedCurve,OID}}.
+    {#'ECPoint'{point=Q}, {namedCurve,OID}};
+extract_public_key(#{engine:=_, key_id:=_, algorithm:=Alg} = M) ->
+    case {Alg, crypto:privkey_to_pubkey(Alg, M)} of
+        {rsa, [E,N]} ->
+            #'RSAPublicKey'{modulus = N, publicExponent = E};
+        {dss, [P,Q,G,Y]} ->
+            {Y, #'Dss-Parms'{p=P, q=Q, g=G}}
+    end.
+
 
 
 verify_host_key(#ssh{algorithms=Alg}=SSH, PublicKey, Digest, {AlgStr,Signature}) ->
     case atom_to_list(Alg#alg.hkey) of
         AlgStr ->
-            case verify(Digest, sha(Alg#alg.hkey), Signature, PublicKey) of
+            case verify(Digest, sha(Alg#alg.hkey), Signature, PublicKey, SSH) of
                 false ->
                     {error, bad_signature};
                 true ->
@@ -875,10 +889,13 @@ known_host_key(#ssh{opts = Opts, key_cb = {KeyCb,KeyCbOpts}, peer = {PeerName,_}
 	{_,true} ->
 	    ok;
 	{_,false} ->
+            DoAdd = ?GET_OPT(save_accepted_host, Opts),
 	    case accepted_host(Ssh, PeerName, Public, Opts) of
-		true ->
+		true when DoAdd == true ->
 		    {_,R} = add_host_key(KeyCb, PeerName, Public, [{key_cb_private,KeyCbOpts}|UserOpts]),
                     R;
+		true when DoAdd == false ->
+                    ok;
 		false ->
 		    {error, rejected_by_user};
                 {error,E} ->
@@ -1255,10 +1272,12 @@ payload(<<PacketLen:32, PaddingLen:8, PayloadAndPadding/binary>>) ->
     <<Payload:PayloadLen/binary, _/binary>> = PayloadAndPadding,
     Payload.
 
+sign(SigData, HashAlg, #{algorithm:=dss} = Key) ->
+    mk_dss_sig(crypto:sign(dss, HashAlg, SigData, Key));
+sign(SigData, HashAlg, #{algorithm:=SigAlg} = Key) ->
+    crypto:sign(SigAlg, HashAlg, SigData, Key);
 sign(SigData, HashAlg,  #'DSAPrivateKey'{} = Key) ->
-    DerSignature = public_key:sign(SigData, HashAlg, Key),
-    #'Dss-Sig-Value'{r = R, s = S} = public_key:der_decode('Dss-Sig-Value', DerSignature),
-    <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>>;
+    mk_dss_sig(public_key:sign(SigData, HashAlg, Key));
 sign(SigData, HashAlg, Key = #'ECPrivateKey'{}) ->
     DerEncodedSign =  public_key:sign(SigData, HashAlg, Key),
     #'ECDSA-Sig-Value'{r=R, s=S} = public_key:der_decode('ECDSA-Sig-Value', DerEncodedSign),
@@ -1266,7 +1285,13 @@ sign(SigData, HashAlg, Key = #'ECPrivateKey'{}) ->
 sign(SigData, HashAlg, Key) ->
     public_key:sign(SigData, HashAlg, Key).
 
-verify(PlainText, HashAlg, Sig, {_,  #'Dss-Parms'{}} = Key) ->
+
+mk_dss_sig(DerSignature) ->
+    #'Dss-Sig-Value'{r = R, s = S} = public_key:der_decode('Dss-Sig-Value', DerSignature),
+    <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>>.
+
+
+verify(PlainText, HashAlg, Sig, {_,  #'Dss-Parms'{}} = Key, _) ->
     case Sig of
         <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>> ->
             Signature = public_key:der_encode('Dss-Sig-Value', #'Dss-Sig-Value'{r = R, s = S}),
@@ -1274,7 +1299,7 @@ verify(PlainText, HashAlg, Sig, {_,  #'Dss-Parms'{}} = Key) ->
         _ ->
             false
     end;
-verify(PlainText, HashAlg, Sig, {#'ECPoint'{},_} = Key) ->
+verify(PlainText, HashAlg, Sig, {#'ECPoint'{},_} = Key, _) ->
     case Sig of
         <<?UINT32(Rlen),R:Rlen/big-signed-integer-unit:8,
           ?UINT32(Slen),S:Slen/big-signed-integer-unit:8>> ->
@@ -1284,7 +1309,15 @@ verify(PlainText, HashAlg, Sig, {#'ECPoint'{},_} = Key) ->
         _ ->
             false
     end;
-verify(PlainText, HashAlg, Sig, Key) ->
+
+verify(PlainText, HashAlg, Sig, #'RSAPublicKey'{}=Key, #ssh{role = server,
+                                                            c_version = "SSH-2.0-OpenSSH_7."++_})
+  when HashAlg == sha256; HashAlg == sha512 ->
+    %% Public key signing bug in in OpenSSH >= 7.2
+    public_key:verify(PlainText, HashAlg, Sig, Key)
+        orelse public_key:verify(PlainText, sha, Sig, Key);
+
+verify(PlainText, HashAlg, Sig, Key, _) ->
     public_key:verify(PlainText, HashAlg, Sig, Key).
 
 
@@ -1817,6 +1850,8 @@ kex_alg_dependent({Min, NBits, Max, Prime, Gen, E, F, K}) ->
 
 %%%----------------------------------------------------------------
 
+valid_key_sha_alg(#{engine:=_, key_id:=_}, _Alg) -> true; % Engine key
+
 valid_key_sha_alg(#'RSAPublicKey'{}, 'rsa-sha2-512') -> true;
 valid_key_sha_alg(#'RSAPublicKey'{}, 'rsa-sha2-384') -> true;
 valid_key_sha_alg(#'RSAPublicKey'{}, 'rsa-sha2-256') -> true;
@@ -1830,11 +1865,14 @@ valid_key_sha_alg(#'RSAPrivateKey'{}, 'ssh-rsa'     ) -> true;
 valid_key_sha_alg({_, #'Dss-Parms'{}}, 'ssh-dss') -> true;
 valid_key_sha_alg(#'DSAPrivateKey'{},  'ssh-dss') -> true;
 
-valid_key_sha_alg({#'ECPoint'{},{namedCurve,OID}},                Alg) -> sha(OID) == sha(Alg);
-valid_key_sha_alg(#'ECPrivateKey'{parameters = {namedCurve,OID}}, Alg) -> sha(OID) == sha(Alg);
+valid_key_sha_alg({#'ECPoint'{},{namedCurve,OID}},                Alg) -> valid_key_sha_alg_ec(OID, Alg);
+valid_key_sha_alg(#'ECPrivateKey'{parameters = {namedCurve,OID}}, Alg) -> valid_key_sha_alg_ec(OID, Alg);
 valid_key_sha_alg(_, _) -> false.
     
-
+valid_key_sha_alg_ec(OID, Alg) -> 
+    Curve = public_key:oid2ssh_curvename(OID),
+    Alg == list_to_atom("ecdsa-sha2-" ++ binary_to_list(Curve)).
+    
 
 public_algo(#'RSAPublicKey'{}) ->   'ssh-rsa';  % FIXME: Not right with draft-curdle-rsa-sha2
 public_algo({_, #'Dss-Parms'{}}) -> 'ssh-dss';
@@ -2000,12 +2038,6 @@ same(Algs) ->  [{client2server,Algs}, {server2client,Algs}].
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 trim_tail(Str) ->
-    lists:reverse(trim_head(lists:reverse(Str))).
-
-trim_head([$\s|Cs]) -> trim_head(Cs);
-trim_head([$\t|Cs]) -> trim_head(Cs);
-trim_head([$\n|Cs]) -> trim_head(Cs);
-trim_head([$\r|Cs]) -> trim_head(Cs);
-trim_head(Cs) -> Cs.
-
-
+    lists:takewhile(fun(C) -> 
+			    C=/=$\r andalso C=/=$\n
+		    end, Str).
diff --git a/lib/ssh/src/sshc_sup.erl b/lib/ssh/src/sshc_sup.erl
index 133b2c6450..f4b39dbbdc 100644
--- a/lib/ssh/src/sshc_sup.erl
+++ b/lib/ssh/src/sshc_sup.erl
@@ -27,7 +27,7 @@
 
 -behaviour(supervisor).
 
--export([start_link/0, start_child/1, stop_child/1]).
+-export([start_link/0, start_child/1]).
 
 %% Supervisor callback
 -export([init/1]).
@@ -43,13 +43,6 @@ start_link() ->
 start_child(Args) ->
     supervisor:start_child(?MODULE, Args).
 
-stop_child(Client) ->
-    spawn(fun() -> 
-		  ClientSup = whereis(?SSHC_SUP),
-		  supervisor:terminate_child(ClientSup, Client)
-	  end),
-    ok.
-
 %%%=========================================================================
 %%%  Supervisor callback
 %%%=========================================================================
@@ -60,10 +53,7 @@ init(_) ->
                 },
     ChildSpecs = [#{id       => undefined, % As simple_one_for_one is used.
                     start    => {ssh_connection_handler, start_link, []},
-                    restart  => temporary,
-                    shutdown => 4000,
-                    type     => worker,
-                    modules  => [ssh_connection_handler]
+                    restart  => temporary % because there is no way to restart a crashed connection
                    }
                  ],
     {ok, {SupFlags,ChildSpecs}}.
diff --git a/lib/ssh/src/sshd_sup.erl b/lib/ssh/src/sshd_sup.erl
index c23e65d955..779a861a54 100644
--- a/lib/ssh/src/sshd_sup.erl
+++ b/lib/ssh/src/sshd_sup.erl
@@ -90,10 +90,8 @@ init(_) ->
 child_spec(Address, Port, Profile, Options) ->
     #{id       => id(Address, Port, Profile),
       start    => {ssh_system_sup, start_link, [Address, Port, Profile, Options]},
-      restart  => temporary,
-      shutdown => infinity,
-      type     => supervisor,
-      modules  => [ssh_system_sup]
+      restart  => temporary, 
+      type     => supervisor
      }.
 
 id(Address, Port, Profile) ->
diff --git a/lib/ssh/test/Makefile b/lib/ssh/test/Makefile
index 5ea048a352..4d84b6c6b6 100644
--- a/lib/ssh/test/Makefile
+++ b/lib/ssh/test/Makefile
@@ -34,10 +34,11 @@ VSN=$(GS_VSN)
 MODULES= \
 	ssh_algorithms_SUITE \
 	ssh_options_SUITE \
-	ssh_renegotiate_SUITE \
 	ssh_basic_SUITE \
 	ssh_bench_SUITE \
+	ssh_compat_SUITE \
 	ssh_connection_SUITE \
+	ssh_engine_SUITE \
 	ssh_protocol_SUITE \
 	ssh_property_test_SUITE \
 	ssh_sftp_SUITE \
@@ -49,6 +50,7 @@ MODULES= \
 	ssh_test_lib \
 	ssh_key_cb \
 	ssh_key_cb_options \
+	ssh_key_cb_engine_keys \
 	ssh_trpt_test_lib \
 	ssh_echo_server \
 	ssh_bench_dev_null \
diff --git a/lib/ssh/test/property_test/ssh_eqc_client_info_timing.erl b/lib/ssh/test/property_test/ssh_eqc_client_info_timing.erl
index c07140dc43..19e2754eba 100644
--- a/lib/ssh/test/property_test/ssh_eqc_client_info_timing.erl
+++ b/lib/ssh/test/property_test/ssh_eqc_client_info_timing.erl
@@ -57,9 +57,9 @@
 
 %%% Properties:
 
-prop_seq(_Config) ->
+prop_seq(Config) ->
     {ok,Pid} = ssh_eqc_event_handler:add_report_handler(),
-    {_, _, Port} = init_daemon(),
+    {_, _, Port} = init_daemon(Config),
     numtests(1000,
 	     ?FORALL(Delay, choose(0,100),%% Micro seconds
 		     try 
@@ -86,7 +86,8 @@ any_relevant_error_report(Pid) ->
 	      end, Reports).
 
 %%%================================================================
-init_daemon() ->
+init_daemon(Config) ->
     ok = begin ssh:stop(), ssh:start() end,
-    ssh_test_lib:daemon([]).
+    DataDir = proplists:get_value(data_dir, Config),
+    ssh_test_lib:daemon([{system_dir,DataDir}]).
 
diff --git a/lib/ssh/test/ssh_algorithms_SUITE.erl b/lib/ssh/test/ssh_algorithms_SUITE.erl
index 98964a2c8a..de6e448ebd 100644
--- a/lib/ssh/test/ssh_algorithms_SUITE.erl
+++ b/lib/ssh/test/ssh_algorithms_SUITE.erl
@@ -29,15 +29,13 @@
 %% Note: This directive should only be used in test suites.
 -compile(export_all).
 
--define(TIMEOUT, 35000).
-
 %%--------------------------------------------------------------------
 %% Common Test interface functions -----------------------------------
 %%--------------------------------------------------------------------
 
 suite() ->
     [{ct_hooks,[ts_install_cth]},
-     {timetrap,{seconds,40}}].
+     {timetrap,{seconds,round(1.5*?TIMEOUT/1000)}}].
 
 all() -> 
     %% [{group,kex},{group,cipher}... etc
@@ -90,7 +88,7 @@ init_per_suite(Config) ->
 		  " -- Max num algorithms: ~p~n"
 		 ,[os:getenv("HOME"),
 		   init:get_argument(home),
-		   os:cmd("ssh -V"),
+		   ssh_test_lib:installed_ssh_version("TIMEOUT"),
 		   ssh:default_algorithms(),
 		   crypto:info_lib(),
 		   ssh_test_lib:default_algorithms(sshc),
@@ -318,10 +316,10 @@ sshc_simple_exec_os_cmd(Config) ->
 		    ok;
 		false ->
 		    ct:log("Bad result: ~p~nExpected: ~p~nMangled result: ~p", [RawResult,Expect,Lines]),
-		    {fail, "Bad result"}
+		    {fail, "Bad result (see log in testcase)"}
 	    end
     after ?TIMEOUT ->
-	    ct:fail("Did not receive answer")
+	    ct:fail("Did not receive answer (timeout)")
     end.
 
 %%--------------------------------------------------------------------
diff --git a/lib/ssh/test/ssh_basic_SUITE.erl b/lib/ssh/test/ssh_basic_SUITE.erl
index db2ae241e5..d3f93c7382 100644
--- a/lib/ssh/test/ssh_basic_SUITE.erl
+++ b/lib/ssh/test/ssh_basic_SUITE.erl
@@ -28,59 +28,12 @@
 -include("ssh_test_lib.hrl").
 
 %% Note: This directive should only be used in test suites.
-%%-compile(export_all).
-
-%%% Test cases
--export([
-	 app_test/1, 
-	 appup_test/1,
-	 cli/1,
-	 close/1,
-	 daemon_already_started/1, 
-	 daemon_opt_fd/1,
-	 multi_daemon_opt_fd/1,
-	 double_close/1, 
-	 exec/1,
-	 exec_compressed/1,  
-	 exec_key_differs1/1,
-	 exec_key_differs2/1,
-	 exec_key_differs3/1,
-	 exec_key_differs_fail/1,
-	 idle_time_client/1,
-	 idle_time_server/1,
-	 inet6_option/1,
-	 inet_option/1,
-	 internal_error/1,
-	 known_hosts/1,
-	 login_bad_pwd_no_retry1/1,
-	 login_bad_pwd_no_retry2/1,
-	 login_bad_pwd_no_retry3/1,
-	 login_bad_pwd_no_retry4/1,
-	 login_bad_pwd_no_retry5/1,
-	 misc_ssh_options/1,
-	 openssh_zlib_basic_test/1,  
-	 packet_size_zero/1, 
-	 pass_phrase/1,
-	 peername_sockname/1, 
-	 send/1,
-	 shell/1,
-	 shell_no_unicode/1,
-	 shell_unicode_string/1,
-	 ssh_info_print/1,
-	 key_callback/1,
-	 key_callback_options/1,
-	 shell_exit_status/1
-	]).
-
-%%% Common test callbacks
--export([suite/0, all/0, groups/0, 
-	 init_per_suite/1, end_per_suite/1, 
-	 init_per_group/2, end_per_group/2, 
-	 init_per_testcase/2, end_per_testcase/2
-	]).
+-compile(export_all).
 
 -define(NEWLINE, <<"\r\n">>).
 
+-define(REKEY_DATA_TMO, 65000).
+
 %%--------------------------------------------------------------------
 %% Common Test interface functions -----------------------------------
 %%--------------------------------------------------------------------
@@ -90,74 +43,97 @@ suite() ->
      {timetrap,{seconds,40}}].
 
 all() -> 
-    [app_test,
-     appup_test,
-     {group, dsa_key},
-     {group, rsa_key},
-     {group, ecdsa_sha2_nistp256_key},
-     {group, ecdsa_sha2_nistp384_key},
-     {group, ecdsa_sha2_nistp521_key},
-     {group, dsa_pass_key},
-     {group, rsa_pass_key},
-     {group, ecdsa_sha2_nistp256_pass_key},
-     {group, ecdsa_sha2_nistp384_pass_key},
-     {group, ecdsa_sha2_nistp521_pass_key},
-     {group, host_user_key_differs},
-     {group, key_cb},
-     {group, internal_error},
-     daemon_already_started,
-     double_close,
-     daemon_opt_fd,
-     multi_daemon_opt_fd,
-     packet_size_zero,
-     ssh_info_print,
-     {group, login_bad_pwd_no_retry},
-     shell_exit_status
-    ].
+    [{group, all_tests}].
+
 
 groups() ->
-    [{dsa_key, [], basic_tests()},
-     {rsa_key, [], basic_tests()},
-     {ecdsa_sha2_nistp256_key, [], basic_tests()},
-     {ecdsa_sha2_nistp384_key, [], basic_tests()},
-     {ecdsa_sha2_nistp521_key, [], basic_tests()},
-     {host_user_key_differs, [], [exec_key_differs1,
-				  exec_key_differs2,
-				  exec_key_differs3,
-				  exec_key_differs_fail]},
+    [{all_tests, [parallel], [{group, ssh_renegotiate_SUITE},
+                              {group, ssh_basic_SUITE}
+                             ]},
+     {ssh_basic_SUITE, [], [app_test,
+                            appup_test,
+                            {group, dsa_key},
+                            {group, rsa_key},
+                            {group, ecdsa_sha2_nistp256_key},
+                            {group, ecdsa_sha2_nistp384_key},
+                            {group, ecdsa_sha2_nistp521_key},
+                            {group, dsa_pass_key},
+                            {group, rsa_pass_key},
+                            {group, ecdsa_sha2_nistp256_pass_key},
+                            {group, ecdsa_sha2_nistp384_pass_key},
+                            {group, ecdsa_sha2_nistp521_pass_key},
+                            {group, host_user_key_differs},
+                            {group, key_cb},
+                            {group, internal_error},
+                            {group, rsa_host_key_is_actualy_ecdsa},
+                            daemon_already_started,
+                            double_close,
+                            daemon_opt_fd,
+                            multi_daemon_opt_fd,
+                            packet_size,
+                            ssh_info_print,
+                            {group, login_bad_pwd_no_retry},
+                            shell_exit_status
+                           ]},
+
+     {ssh_renegotiate_SUITE, [parallel], [rekey,
+                                          rekey_limit,
+                                          renegotiate1,
+                                          renegotiate2]},
+
+     {dsa_key, [], [{group, basic}]},
+     {rsa_key, [], [{group, basic}]},
+     {ecdsa_sha2_nistp256_key, [], [{group, basic}]},
+     {ecdsa_sha2_nistp384_key, [], [{group, basic}]},
+     {ecdsa_sha2_nistp521_key, [], [{group, basic}]},
+     {rsa_host_key_is_actualy_ecdsa, [], [fail_daemon_start]},
+     {host_user_key_differs, [parallel], [exec_key_differs1,
+                                          exec_key_differs2,
+                                          exec_key_differs3,
+                                          exec_key_differs_fail]},
      {dsa_pass_key, [], [pass_phrase]},
      {rsa_pass_key, [], [pass_phrase]},
      {ecdsa_sha2_nistp256_pass_key, [], [pass_phrase]},
      {ecdsa_sha2_nistp384_pass_key, [], [pass_phrase]},
      {ecdsa_sha2_nistp521_pass_key, [], [pass_phrase]},
-     {key_cb, [], [key_callback, key_callback_options]},
+     {key_cb, [parallel], [key_callback, key_callback_options]},
      {internal_error, [], [internal_error]},
-     {login_bad_pwd_no_retry, [], [login_bad_pwd_no_retry1,
-				   login_bad_pwd_no_retry2,
-				   login_bad_pwd_no_retry3,
-				   login_bad_pwd_no_retry4,
-				   login_bad_pwd_no_retry5
-				  ]}
+     {login_bad_pwd_no_retry, [parallel], [login_bad_pwd_no_retry1,
+                                           login_bad_pwd_no_retry2,
+                                           login_bad_pwd_no_retry3,
+                                           login_bad_pwd_no_retry4,
+                                           login_bad_pwd_no_retry5
+                                          ]},
+     
+     {basic, [], [{group,p_basic},
+                  close, 
+                  known_hosts
+                 ]},
+     {p_basic, [parallel], [send, peername_sockname,
+                            exec, exec_compressed, 
+                            shell, shell_no_unicode, shell_unicode_string,
+                            cli,
+                            idle_time_client, idle_time_server, openssh_zlib_basic_test, 
+                            misc_ssh_options, inet_option, inet6_option]}
     ].
 
 
-basic_tests() ->
-    [send, close, peername_sockname,
-     exec, exec_compressed, 
-     shell, shell_no_unicode, shell_unicode_string,
-     cli, known_hosts, 
-     idle_time_client, idle_time_server, openssh_zlib_basic_test, 
-     misc_ssh_options, inet_option, inet6_option].
+        
 
 
 %%--------------------------------------------------------------------
 init_per_suite(Config) ->
-    ?CHECK_CRYPTO(Config).
+    ?CHECK_CRYPTO(begin
+                      ssh:start(),
+                      Config
+                  end).
 
 end_per_suite(_Config) ->
     ssh:stop().
 
 %%--------------------------------------------------------------------
+init_per_group(ssh_renegotiate_SUITE, Config) ->
+    [{preferred_algorithms, ssh:default_algorithms()} | Config];
 init_per_group(dsa_key, Config) ->
     case lists:member('ssh-dss',
 		      ssh_transport:default_algorithms(public_key)) of
@@ -180,6 +156,31 @@ init_per_group(rsa_key, Config) ->
 	false ->
 	    {skip, unsupported_pub_key}
     end;
+init_per_group(rsa_host_key_is_actualy_ecdsa, Config) ->
+    case 
+        lists:member('ssh-rsa',
+		      ssh_transport:default_algorithms(public_key)) and
+        lists:member('ecdsa-sha2-nistp256',
+                     ssh_transport:default_algorithms(public_key))
+    of
+	true ->
+            DataDir = proplists:get_value(data_dir, Config),
+            PrivDir = proplists:get_value(priv_dir, Config),
+	    ssh_test_lib:setup_ecdsa("256", DataDir, PrivDir),
+            %% The following sets up bad rsa keys:
+            begin
+                UserDir = PrivDir,
+                System = filename:join(UserDir, "system"),
+                file:copy(filename:join(DataDir, "id_rsa"), filename:join(UserDir, "id_rsa")),
+                file:rename(filename:join(System, "ssh_host_ecdsa_key"), filename:join(System, "ssh_host_rsa_key")),
+                file:rename(filename:join(System, "ssh_host_ecdsa_key.pub"), filename:join(System, "ssh_host_rsa_key.pub")),
+                ssh_test_lib:setup_rsa_known_host(DataDir, UserDir),
+                ssh_test_lib:setup_rsa_auth_keys(DataDir, UserDir)
+            end,
+            Config;
+	false ->
+	    {skip, unsupported_pub_key}
+    end;
 init_per_group(ecdsa_sha2_nistp256_key, Config) ->
     case lists:member('ecdsa-sha2-nistp256',
 		      ssh_transport:default_algorithms(public_key)) of
@@ -304,7 +305,8 @@ init_per_group(internal_error, Config) ->
     DataDir = proplists:get_value(data_dir, Config),
     PrivDir = proplists:get_value(priv_dir, Config),
     ssh_test_lib:setup_dsa(DataDir, PrivDir),
-    file:delete(filename:join(PrivDir, "system/ssh_host_dsa_key")),
+    %% In the test case the key will be deleted after the daemon start:
+    %% ... file:delete(filename:join(PrivDir, "system/ssh_host_dsa_key")),
     Config;
 init_per_group(dir_options, Config) ->
     PrivDir = proplists:get_value(priv_dir, Config),
@@ -385,7 +387,6 @@ init_per_testcase(TC, Config) when TC==shell_no_unicode ;
     PrivDir = proplists:get_value(priv_dir, Config),
     UserDir = proplists:get_value(priv_dir, Config),
     SysDir =  proplists:get_value(data_dir, Config),
-    ssh:start(),
     Sftpd = {_Pid, _Host, Port} =       
 	ssh_test_lib:daemon([{system_dir, SysDir},
 			     {user_dir, PrivDir},
@@ -408,7 +409,6 @@ init_per_testcase(inet6_option, Config) ->
 	    {skip,"No ipv6 interface address"}
     end;
 init_per_testcase(_TestCase, Config) ->
-    ssh:start(),
     Config.
 
 end_per_testcase(TestCase, Config) when TestCase == server_password_option;
@@ -429,7 +429,6 @@ end_per_testcase(_TestCase, Config) ->
     end_per_testcase(Config).
 
 end_per_testcase(_Config) ->
-    ssh:stop(),
     ok.
 
 %%--------------------------------------------------------------------
@@ -451,8 +450,8 @@ misc_ssh_options(Config) when is_list(Config) ->
     SystemDir = filename:join(proplists:get_value(priv_dir, Config), system),
     UserDir = proplists:get_value(priv_dir, Config),
     
-    CMiscOpt0 = [{connect_timeout, 1000}, {user_dir, UserDir}],
-    CMiscOpt1 = [{connect_timeout, infinity}, {user_dir, UserDir}],
+    CMiscOpt0 = [{connect_timeout, 1000}, {user_dir, UserDir}, {silently_accept_hosts, true}],
+    CMiscOpt1 = [{connect_timeout, infinity}, {user_dir, UserDir}, {silently_accept_hosts, true}],
     SMiscOpt0 =  [{user_dir, UserDir}, {system_dir, SystemDir}],
     SMiscOpt1 =  [{user_dir, UserDir}, {system_dir, SystemDir}],
 
@@ -735,11 +734,11 @@ cli(Config) when is_list(Config) ->
     
     {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
     ssh_connection:shell(ConnectionRef, ChannelId),
-    ok = ssh_connection:send(ConnectionRef, ChannelId, <<"q">>),
+    ssh_connection:send(ConnectionRef, ChannelId, <<"q">>),
     receive 
 	{ssh_cm, ConnectionRef,
 	 {data,0,0, <<"\r\nYou are accessing a dummy, type \"q\" to exit\r\n\n">>}} ->
-	    ok = ssh_connection:send(ConnectionRef, ChannelId, <<"q">>)
+	    ssh_connection:send(ConnectionRef, ChannelId, <<"q">>)
     after 
 	30000 -> ct:fail("timeout ~p:~p",[?MODULE,?LINE])
     end,
@@ -868,12 +867,17 @@ key_callback_options(Config) when is_list(Config) ->
 %%% Test that client does not hang if disconnects due to internal error
 internal_error(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
-    SystemDir = filename:join(proplists:get_value(priv_dir, Config), system),
+    PrivDir = proplists:get_value(priv_dir, Config),
     UserDir = proplists:get_value(priv_dir, Config),
+    SystemDir = filename:join(PrivDir, system),
     
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SystemDir},
                                              {user_dir, UserDir},
                                              {failfun, fun ssh_test_lib:failfun/2}]),
+
+    %% Now provoke an error in the following connect:
+    file:delete(filename:join(PrivDir, "system/ssh_host_dsa_key")), 
+
     {error, Error} =
         ssh:connect(Host, Port, [{silently_accept_hosts, true},
                                  {user_dir, UserDir},
@@ -902,6 +906,17 @@ send(Config) when is_list(Config) ->
 
 
 %%--------------------------------------------------------------------
+%%%
+fail_daemon_start(Config) when is_list(Config) ->
+    process_flag(trap_exit, true),
+    SystemDir = filename:join(proplists:get_value(priv_dir, Config), system),
+    UserDir = proplists:get_value(priv_dir, Config),
+
+    {error,_} = ssh_test_lib:daemon([{system_dir, SystemDir},
+                                     {user_dir, UserDir},
+                                     {failfun, fun ssh_test_lib:failfun/2}]).
+
+%%--------------------------------------------------------------------
 %%% Test ssh:connection_info([peername, sockname])
 peername_sockname(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
@@ -1059,7 +1074,7 @@ multi_daemon_opt_fd(Config) ->
      end || {S,Pid,C} <- Tests].
 
 %%--------------------------------------------------------------------
-packet_size_zero(Config) ->
+packet_size(Config) ->
     SystemDir = proplists:get_value(data_dir, Config),
     PrivDir = proplists:get_value(priv_dir, Config), 
     UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
@@ -1074,21 +1089,36 @@ packet_size_zero(Config) ->
 					  {user_interaction, false},
 					  {user, "vego"},
 					  {password, "morot"}]),
-
-    {ok,Chan} = ssh_connection:session_channel(Conn, 1000, _MaxPacketSize=0, 60000),
-    ok = ssh_connection:shell(Conn, Chan),
+    lists:foreach(
+      fun(MaxPacketSize) ->
+              ct:log("Try max_packet_size=~p",[MaxPacketSize]),
+              {ok,Ch} = ssh_connection:session_channel(Conn, 1000, MaxPacketSize, 60000),
+              ok = ssh_connection:shell(Conn, Ch),
+              rec(Server, Conn, Ch, MaxPacketSize),
+              ssh_connection:close(Conn, Ch)
+      end, [0, 1, 10, 25]),
 
     ssh:close(Conn),
     ssh:stop_daemon(Server),
+    ok.
 
+
+rec(Server, Conn, Ch, MaxSz) ->
     receive
-	{ssh_cm,Conn,{data,Chan,_Type,_Msg1}} = M ->
-	    ct:log("Got ~p",[M]),
-	    ct:fail(doesnt_obey_max_packet_size_0)
-    after 5000 ->
-	    ok
-    end.    
-    
+        {ssh_cm,Conn,{data,Ch,_,M}} when size(M) =< MaxSz ->
+            ct:log("~p: ~p",[MaxSz,M]),
+            rec(Server, Conn, Ch, MaxSz);
+        {ssh_cm,Conn,{data,Ch,_,_}} = M ->
+            ct:log("Max pkt size=~p. Got ~p",[MaxSz,M]),
+            ssh:close(Conn),
+            ssh:stop_daemon(Server),
+            ct:fail("Does not obey max_packet_size=~p",[MaxSz])
+    after
+        2000 -> 
+            ct:log("~p: ok!",[MaxSz]),
+            ok
+    end.
+
 %%--------------------------------------------------------------------
 shell_no_unicode(Config) ->
     new_do_shell(proplists:get_value(io,Config),
@@ -1295,19 +1325,166 @@ shell_exit_status(Config) when is_list(Config) ->
     ssh:stop_daemon(Pid).
 
 
+%%% Idle timeout test
+rekey() -> [{timetrap,{seconds,90}}].
+    
+rekey(Config) ->
+    {Pid, Host, Port} = 
+	ssh_test_lib:std_daemon(Config,
+				[{rekey_limit, 0}]),
+    ConnectionRef =
+	ssh_test_lib:std_connect(Config, Host, Port, 
+				 [{rekey_limit, 0}]),
+    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
+    receive
+    after ?REKEY_DATA_TMO ->
+	    %%By this time rekeying would have been done
+	    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
+	    false = (Kex2 == Kex1),
+	    ssh:close(ConnectionRef),
+	    ssh:stop_daemon(Pid)
+    end.
+
+%%--------------------------------------------------------------------
+
+%%% Test rekeying by data volume
+
+rekey_limit() -> [{timetrap,{seconds,400}}].
+
+rekey_limit(Config) ->
+    UserDir = proplists:get_value(priv_dir, Config),
+    DataFile = filename:join(UserDir, "rekey.data"),
+
+    Algs = proplists:get_value(preferred_algorithms, Config),
+    {Pid, Host, Port} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
+							{preferred_algorithms,Algs}]),
+
+    ConnectionRef = ssh_test_lib:std_connect(Config, Host, Port, [{rekey_limit, 6000},
+								  {max_random_length_padding,0}]),
+    {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
+
+    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    timer:sleep(?REKEY_DATA_TMO),
+    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    Data = lists:duplicate(159000,1),
+    ok = ssh_sftp:write_file(SftpPid, DataFile, Data),
+
+    timer:sleep(?REKEY_DATA_TMO),
+    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    false = (Kex2 == Kex1),
+
+    timer:sleep(?REKEY_DATA_TMO),
+    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    ok = ssh_sftp:write_file(SftpPid, DataFile, "hi\n"),
+
+    timer:sleep(?REKEY_DATA_TMO),
+    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    false = (Kex2 == Kex1),
+
+    timer:sleep(?REKEY_DATA_TMO),
+    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    ssh_sftp:stop_channel(SftpPid),
+    ssh:close(ConnectionRef),
+    ssh:stop_daemon(Pid).
+
+%%--------------------------------------------------------------------
+
+%%% Test rekeying with simulataneous send request
+
+renegotiate1(Config) ->
+    UserDir = proplists:get_value(priv_dir, Config),
+    DataFile = filename:join(UserDir, "renegotiate1.data"),
+
+    Algs = proplists:get_value(preferred_algorithms, Config),
+    {Pid, Host, DPort} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
+							 {preferred_algorithms,Algs}]),
+
+    RPort = ssh_test_lib:inet_port(),
+    {ok,RelayPid} = ssh_relay:start_link({0,0,0,0}, RPort, Host, DPort),
+
+
+    ConnectionRef = ssh_test_lib:std_connect(Config, Host, RPort, [{max_random_length_padding,0}]),
+    {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
+
+    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    {ok, Handle} = ssh_sftp:open(SftpPid, DataFile, [write]),
+
+    ok = ssh_sftp:write(SftpPid, Handle, "hi\n"),
+
+    ssh_relay:hold(RelayPid, rx, 20, 1000),
+    ssh_connection_handler:renegotiate(ConnectionRef),
+    spawn(fun() -> ok=ssh_sftp:write(SftpPid, Handle, "another hi\n") end),
+
+    timer:sleep(2000),
+
+    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    false = (Kex2 == Kex1),
+    
+    ssh_relay:stop(RelayPid),
+    ssh_sftp:stop_channel(SftpPid),
+    ssh:close(ConnectionRef),
+    ssh:stop_daemon(Pid).
+
+%%--------------------------------------------------------------------
+
+%%% Test rekeying with inflight messages from peer
+
+renegotiate2(Config) ->
+    UserDir = proplists:get_value(priv_dir, Config),
+    DataFile = filename:join(UserDir, "renegotiate2.data"),
+
+    Algs = proplists:get_value(preferred_algorithms, Config),
+    {Pid, Host, DPort} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
+							 {preferred_algorithms,Algs}]),
+
+    RPort = ssh_test_lib:inet_port(),
+    {ok,RelayPid} = ssh_relay:start_link({0,0,0,0}, RPort, Host, DPort),
+
+    ConnectionRef = ssh_test_lib:std_connect(Config, Host, RPort, [{max_random_length_padding,0}]),
+    {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
+
+    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    {ok, Handle} = ssh_sftp:open(SftpPid, DataFile, [write]),
+
+    ok = ssh_sftp:write(SftpPid, Handle, "hi\n"),
+
+    ssh_relay:hold(RelayPid, rx, 20, infinity),
+    spawn(fun() -> ok=ssh_sftp:write(SftpPid, Handle, "another hi\n") end),
+    %% need a small pause here to ensure ssh_sftp:write is executed
+    ct:sleep(10),
+    ssh_connection_handler:renegotiate(ConnectionRef),
+    ssh_relay:release(RelayPid, rx),
+
+    timer:sleep(2000),
+
+    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
+
+    false = (Kex2 == Kex1),
+
+    ssh_relay:stop(RelayPid),
+    ssh_sftp:stop_channel(SftpPid),
+    ssh:close(ConnectionRef),
+    ssh:stop_daemon(Pid).
+
 %%--------------------------------------------------------------------
 %% Internal functions ------------------------------------------------
 %%--------------------------------------------------------------------
 %% Due to timing the error message may or may not be delivered to
 %% the "tcp-application" before the socket closed message is recived
-check_error("Invalid state") ->
-    ok;
-check_error("Connection closed") ->
-    ok;
-check_error("Selection of key exchange algorithm failed"++_) ->
-    ok;
-check_error(Error) ->
-    ct:fail(Error).
+check_error("Invalid state") -> ok;
+check_error("Connection closed") -> ok;
+check_error("Selection of key exchange algorithm failed"++_) -> ok;
+check_error("No host key available") -> ok;
+check_error(Error) -> ct:fail(Error).
 
 basic_test(Config) ->
     ClientOpts = proplists:get_value(client_opts, Config),
@@ -1449,7 +1626,7 @@ new_do_shell(IO, N, Ops=[{Order,Arg}|More]) ->
 		    ct:fail("*** Expected ~p, but got ~p",[string:strip(ExpStr),RecStr])
 	    end
     after 30000 ->
-	    ct:log("Meassage queue of ~p:~n~p",
+	    ct:log("Message queue of ~p:~n~p",
 		   [self(), erlang:process_info(self(), messages)]),
 	    case Order of
 		expect -> ct:fail("timeout, expected ~p",[string:strip(Arg)]);
diff --git a/lib/ssh/test/ssh_compat_SUITE.erl b/lib/ssh/test/ssh_compat_SUITE.erl
new file mode 100644
index 0000000000..f7eda1dc08
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE.erl
@@ -0,0 +1,1399 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+
+-module(ssh_compat_SUITE).
+
+-include_lib("common_test/include/ct.hrl").
+-include_lib("ssh/src/ssh_transport.hrl"). % #ssh_msg_kexinit{}
+-include_lib("kernel/include/inet.hrl"). % #hostent{}
+-include_lib("kernel/include/file.hrl"). % #file_info{}
+-include("ssh_test_lib.hrl").
+
+%% Note: This directive should only be used in test suites.
+-compile(export_all).
+
+-define(USER,"sshtester").
+-define(PASSWD, "foobar").
+-define(BAD_PASSWD, "NOT-"?PASSWD).
+-define(DOCKER_PFX, "ssh_compat_suite-ssh").
+
+%%--------------------------------------------------------------------
+%% Common Test interface functions -----------------------------------
+%%--------------------------------------------------------------------
+
+suite() ->
+    [%%{ct_hooks,[ts_install_cth]},
+     {timetrap,{seconds,40}}].
+
+all() ->
+%%    [check_docker_present] ++
+    [{group,G} || G <- ssh_image_versions()].
+
+groups() ->
+    [{otp_client, [], [login_otp_is_client,
+                       all_algorithms_sftp_exec_reneg_otp_is_client,
+                       send_recv_big_with_renegotiate_otp_is_client
+                      ]},
+     {otp_server, [], [login_otp_is_server,
+                       all_algorithms_sftp_exec_reneg_otp_is_server
+                      ]} |
+     [{G, [], [{group,otp_client}, {group,otp_server}]} || G <- ssh_image_versions()]
+    ].
+
+
+ssh_image_versions() ->
+    try
+        %% Find all useful containers in such a way that undefined command, too low
+        %% priviliges, no containers and containers found give meaningful result:
+        L0 = ["REPOSITORY"++_|_] = string:tokens(os:cmd("docker images"), "\r\n"),
+        [["REPOSITORY","TAG"|_]|L1] = [string:tokens(E, " ") || E<-L0],
+        [list_to_atom(V) || [?DOCKER_PFX,V|_] <- L1]
+    of
+        Vs ->
+            lists:sort(Vs)
+    catch
+        error:{badmatch,_} ->
+            []
+    end.
+
+%%--------------------------------------------------------------------
+init_per_suite(Config) ->
+    ?CHECK_CRYPTO(
+       case os:find_executable("docker") of
+           false ->
+               {skip, "No docker"};
+           _ ->
+               ssh:start(),
+               ct:log("Crypto info: ~p",[crypto:info_lib()]),
+               Config
+       end).
+
+end_per_suite(Config) ->
+    %% Remove all containers that are not running:
+%%%    os:cmd("docker rm $(docker ps -aq -f status=exited)"),
+    %% Remove dangling images:
+%%%    os:cmd("docker rmi $(docker images -f dangling=true -q)"),
+    catch ssh:stop(),
+    Config.
+
+
+init_per_group(otp_server, Config) ->
+    case proplists:get_value(common_remote_client_algs, Config) of
+        undefined ->
+            SSHver = proplists:get_value(ssh_version, Config, ""),
+            {skip,"No "++SSHver++ " client found in docker"};
+        _ ->
+            Config
+    end;
+
+init_per_group(otp_client, Config) ->
+    Config;
+
+init_per_group(G, Config0) ->
+    case lists:member(G, ssh_image_versions()) of
+	true ->
+            %% This group is for one of the images
+            Vssh = atom_to_list(G),
+            Cmnt = io_lib:format("+++ ~s +++",[Vssh]),
+            ct:comment("~s",[Cmnt]),
+            try start_docker(G) of
+                {ok,ID} ->
+                    ct:log("==> ~p started",[G]),
+                    %% Find the algorithms that both client and server supports:
+                    {IP,Port} = ip_port([{id,ID}]),
+                    ct:log("Try contact ~p:~p",[IP,Port]),
+                    Config1 = [{id,ID},
+                               {ssh_version,Vssh}
+                               | Config0],
+                    try common_algs(Config1, IP, Port) of
+                        {ok, ServerHello, RemoteServerCommon, ClientHello, RemoteClientCommon} ->
+                            case chk_hellos([ServerHello,ClientHello], Cmnt) of
+                                Cmnt ->
+                                    ok;
+                                NewCmnt ->
+                                    ct:comment("~s",[NewCmnt])
+                            end,
+                            AuthMethods =
+                                %% This should be obtained by quering the peer, but that
+                                %% is a bit hard. It is possible with ssh_protocol_SUITE
+                                %% techniques, but it can wait.
+                                case Vssh of
+                                    "dropbear" ++ _ ->
+                                        [password, publickey];
+                                    _ ->
+                                        [password, 'keyboard-interactive', publickey]
+                                end,
+                            [{common_remote_server_algs,RemoteServerCommon},
+                             {common_remote_client_algs,RemoteClientCommon},
+                             {common_authmethods,AuthMethods}
+                             |Config1];
+                        Other ->
+                            ct:log("Error in init_per_group: ~p",[Other]),
+                            stop_docker(ID),
+                            {fail, "Can't contact docker sshd"}
+                    catch
+                        Class:Exc ->
+                            ST = erlang:get_stacktrace(),
+                            ct:log("common_algs: ~p:~p~n~p",[Class,Exc,ST]),
+                            stop_docker(ID),
+                            {fail, "Failed during setup"}
+                    end
+            catch
+                cant_start_docker ->
+                    {skip, "Can't start docker"};
+
+                C:E ->
+                    ST = erlang:get_stacktrace(),
+                    ct:log("No ~p~n~p:~p~n~p",[G,C,E,ST]),
+                    {skip, "Can't start docker"}
+            end;
+
+	false ->
+	    Config0
+    end.
+
+end_per_group(G, Config) ->
+    case lists:member(G, ssh_image_versions()) of
+        true ->
+            catch stop_docker(proplists:get_value(id,Config));
+        false ->
+            ok
+    end.
+
+%%--------------------------------------------------------------------
+%% Test Cases --------------------------------------------------------
+%%--------------------------------------------------------------------
+check_docker_present(_Config) ->
+    ct:log("This testcase is just to show in Monitor that we have a test host with docker installed",[]),
+    {fail, "Test is OK: just showing docker is available"}.
+
+%%--------------------------------------------------------------------
+login_otp_is_client(Config) ->
+    {IP,Port} = ip_port(Config),
+    PublicKeyAlgs = [A || {public_key,A} <- proplists:get_value(common_remote_server_algs, Config)],
+    CommonAuths =
+        [{AuthMethod,Alg} || AuthMethod <- proplists:get_value(common_authmethods, Config),
+                             Alg <- case AuthMethod of
+                                        publickey ->
+                                            PublicKeyAlgs;
+                                        _ ->
+                                            [' ']
+                                    end
+        ],
+                                        
+    chk_all_algos(?FUNCTION_NAME, CommonAuths, Config,
+                  fun(AuthMethod,Alg) ->
+                          {Opts,Dir} =
+                              case AuthMethod of
+                                  publickey ->
+                                      {[], setup_remote_auth_keys_and_local_priv(Alg, Config)};
+                                  _ ->
+                                      {[{password,?PASSWD}], new_dir(Config)}
+                              end,
+                          ssh:connect(IP, Port, [{auth_methods, atom_to_list(AuthMethod)},
+                                                 {user,?USER},
+                                                 {user_dir, Dir},
+                                                 {silently_accept_hosts,true},
+                                                 {user_interaction,false}
+                                                 | Opts
+                                                ])
+                  end).
+    
+
+%%--------------------------------------------------------------------
+login_otp_is_server(Config) ->
+    PublicKeyAlgs = [A || {public_key,A} <- proplists:get_value(common_remote_client_algs, Config)],
+    CommonAuths =
+        [{AuthMethod,Alg} || AuthMethod <- proplists:get_value(common_authmethods, Config),
+                             Alg <- case AuthMethod of
+                                        publickey ->
+                                            PublicKeyAlgs;
+                                        _ ->
+                                            [' ']
+                                    end
+        ],
+    SysDir = setup_local_hostdir(hd(PublicKeyAlgs), Config),
+    chk_all_algos(?FUNCTION_NAME, CommonAuths, Config,
+                  fun(AuthMethod,Alg) ->
+                          {Opts,UsrDir} =
+                              case AuthMethod of
+                                  publickey ->
+                                      {[{user_passwords, [{?USER,?BAD_PASSWD}]}],
+                                       setup_remote_priv_and_local_auth_keys(Alg, Config)
+                                      };
+                                  _ ->
+                                      {[{user_passwords, [{?USER,?PASSWD}]}],
+                                       new_dir(Config)
+                                      }
+                              end,
+                          {Server, Host, HostPort} =
+                              ssh_test_lib:daemon(0,
+                                                  [{auth_methods, atom_to_list(AuthMethod)},
+                                                   {system_dir, SysDir},
+                                                   {user_dir, UsrDir},
+                                                   {failfun, fun ssh_test_lib:failfun/2}
+                                                   | Opts
+                                                  ]),
+                          R = exec_from_docker(Config, Host, HostPort,
+                                               "'lists:concat([\"Answer=\",1+3]).\r\n'",
+                                               [<<"Answer=4">>],
+                                               ""),
+                          ssh:stop_daemon(Server),
+                          R
+                  end).
+
+%%--------------------------------------------------------------------
+all_algorithms_sftp_exec_reneg_otp_is_client(Config) ->
+    CommonAlgs = proplists:get_value(common_remote_server_algs, Config),
+    {IP,Port} = ip_port(Config),
+    chk_all_algos(?FUNCTION_NAME, CommonAlgs, Config,
+                  fun(Tag, Alg) ->
+                          ConnRes =
+                              ssh:connect(IP, Port, 
+                                          [{user,?USER},
+                                           {password,?PASSWD},
+                                           {auth_methods, "password"},
+                                           {user_dir, new_dir(Config)},
+                                           {preferred_algorithms, [{Tag,[Alg]}]},
+                                           {silently_accept_hosts,true},
+                                           {user_interaction,false}
+                                          ])  ,
+                          test_erl_client_reneg(ConnRes, % Seems that max 10 channels may be open in sshd
+                                                [{exec,1},
+                                                 {sftp,5},
+                                                 {no_subsyst,1},
+                                                 {setenv, 1},
+                                                 {sftp_async,1}
+                                                ])
+                  end).
+
+%%--------------------------------------------------------------------
+all_algorithms_sftp_exec_reneg_otp_is_server(Config) ->
+    CommonAlgs = proplists:get_value(common_remote_client_algs, Config),
+    UserDir = setup_remote_priv_and_local_auth_keys('ssh-rsa', Config),
+    chk_all_algos(?FUNCTION_NAME, CommonAlgs, Config,
+                  fun(Tag,Alg) ->
+                          HostKeyAlg = case Tag of
+                                           public_key -> Alg;
+                                           _ -> 'ssh-rsa'
+                                       end,
+                          SftpRootDir = new_dir(Config),
+                          %% ct:log("Rootdir = ~p",[SftpRootDir]),
+                          {Server, Host, HostPort} =
+                              ssh_test_lib:daemon(0,
+                                                  [{preferred_algorithms, [{Tag,[Alg]}]},
+                                                   {system_dir, setup_local_hostdir(HostKeyAlg, Config)},
+                                                   {user_dir, UserDir},
+                                                   {user_passwords, [{?USER,?PASSWD}]},
+                                                   {failfun, fun ssh_test_lib:failfun/2},
+                                                   {subsystems,
+                                                    [ssh_sftpd:subsystem_spec([{cwd,SftpRootDir},
+                                                                               {root,SftpRootDir}]),
+                                                     {"echo_10",{ssh_echo_server,[10,[{dbg,true}]]}}
+                                                    ]}
+                                                  ]),
+                          R = do([fun() ->
+                                          exec_from_docker(Config, Host, HostPort,
+                                                           "hi_there.\r\n",
+                                                           [<<"hi_there">>],
+                                                           "")
+                                  end,
+                                  fun() ->
+                                          sftp_tests_erl_server(Config, Host, HostPort, SftpRootDir, UserDir)
+                                  end
+                                 ]),
+                          ssh:stop_daemon(Server),
+                          R
+                  end).
+
+%%--------------------------------------------------------------------
+send_recv_big_with_renegotiate_otp_is_client(Config) ->
+    %% Connect to the remote openssh server:
+    {IP,Port} = ip_port(Config),
+    {ok,C} = ssh:connect(IP, Port, [{user,?USER},
+                                    {password,?PASSWD},
+                                    {user_dir, setup_remote_auth_keys_and_local_priv('ssh-rsa', Config)},
+                                    {silently_accept_hosts,true},
+                                    {user_interaction,false}
+                                   ]),
+
+    %% Open a channel and exec the Linux 'cat' command at the openssh side.
+    %% This 'cat' will read stdin and write to stdout until an eof is read from stdin.
+    {ok, Ch1} = ssh_connection:session_channel(C, infinity),
+    success = ssh_connection:exec(C, Ch1, "cat", infinity),
+
+    %% Build big binary
+    HalfSizeBytes = 100*1000*1000,
+    Data = << <<X:32>> || X <- lists:seq(1, HalfSizeBytes div 4)>>,
+
+    %% Send the data. Must spawn a process to avoid deadlock. The client will block
+    %% until all is sent through the send window. But the server will stop receiveing
+    %% when the servers send-window towards the client is full.
+    %% Since the client can't receive before the server has received all but 655k from the client
+    %% ssh_connection:send/4 is blocking...
+    spawn_link(
+      fun() ->
+              ct:comment("Sending ~p Mbytes with renegotiation in the middle",[2*byte_size(Data)/1000000]),
+              %% ct:log("sending first ~p bytes",[byte_size(Data)]),
+              ok = ssh_connection:send(C, Ch1, Data, 10000),
+              %% ct:log("Init renegotiation test",[]),
+              Kex1 = renegotiate_test(init, C),
+              %% ct:log("sending next ~p bytes",[byte_size(Data)]),
+              ok = ssh_connection:send(C, Ch1, Data, 10000),
+              %% ct:log("Finnish renegotiation test",[]),
+              renegotiate_test(Kex1, C),
+              %% ct:log("sending eof",[]),
+              ok = ssh_connection:send_eof(C, Ch1)
+              %%, ct:log("READY, sent ~p bytes",[2*byte_size(Data)])
+      end),
+
+    {eof,ReceivedData} =
+        loop_until(fun({eof,_}) -> true;
+                      (_      ) -> false
+                   end,
+                   fun(Acc) ->
+                           %%ct:log("Get more ~p",[ ExpectedSize-byte_size(Acc) ]),
+                           receive
+                               {ssh_cm, C, {eof,Ch}} when Ch==Ch1 ->
+                                   %% ct:log("eof received",[]),
+                                   {eof,Acc};
+
+                               {ssh_cm, C, {data,Ch,0,B}} when Ch==Ch1,
+                                                               is_binary(B) ->
+                                   %% ct:log("(1) Received ~p bytes (total ~p), missing ~p bytes",
+                                   %%        [byte_size(B),
+                                   %%         byte_size(B)+byte_size(Acc),
+                                   %%         2*byte_size(Data)-(byte_size(B)+byte_size(Acc))]),
+                                   ssh_connection:adjust_window(C, Ch1, byte_size(B)),
+                                   <<Acc/binary, B/binary>>
+                           end
+                   end,
+                   <<>>),
+
+    ExpectedData = <<Data/binary, Data/binary>>,
+    case ReceivedData of
+        ExpectedData ->
+            %% ct:log("Correct data returned",[]),
+            %% receive close messages
+            loop_until(fun(Left) -> %% ct:log("Expect: ~p",[Left]),
+                                    Left == []
+                       end,
+                       fun([Next|Rest]) ->
+                               receive
+                                  {ssh_cm,C,Next} -> Rest
+                               end 
+                       end,
+                       [%% Already received: {eof, Ch1},
+                        {exit_status,Ch1,0},
+                        {closed,Ch1}]
+                      ),
+            ok;
+        _ when is_binary(ReceivedData) ->
+            ct:fail("~p bytes echoed but ~p expected", [byte_size(ReceivedData), 2*byte_size(Data)])
+    end.
+
+%%--------------------------------------------------------------------
+%% Utilities ---------------------------------------------------------
+%%--------------------------------------------------------------------
+
+%%--------------------------------------------------------------------
+%%
+%% A practical meta function
+%% 
+loop_until(CondFun, DoFun, Acc) ->
+    case CondFun(Acc) of
+        true ->
+            Acc;
+        false ->
+            loop_until(CondFun, DoFun, DoFun(Acc))
+    end.
+
+%%--------------------------------------------------------------------
+%%
+%% Exec the Command in the docker.  Add the arguments ExtraSshArg in the
+%% ssh command.
+%%
+%% If Expects is returned, then return 'ok', else return {fail,Msg}.
+%% 
+exec_from_docker(Config, HostIP, HostPort, Command, Expects, ExtraSshArg) when is_binary(hd(Expects)),
+                                                                               is_list(Config) ->
+    {DockerIP,DockerPort} = ip_port(Config),
+    {ok,C} = ssh:connect(DockerIP, DockerPort,
+                         [{user,?USER},
+                          {password,?PASSWD},
+                          {user_dir, new_dir(Config)},
+                          {silently_accept_hosts,true},
+                          {user_interaction,false}
+                         ]),
+    R = exec_from_docker(C, HostIP, HostPort, Command, Expects, ExtraSshArg, Config),
+    ssh:close(C),
+    R.
+
+exec_from_docker(C, DestIP, DestPort, Command, Expects, ExtraSshArg, Config) when is_binary(hd(Expects)) ->
+    ExecCommand =
+        lists:concat(
+          ["sshpass -p ",?PASSWD," "
+           | case proplists:get_value(ssh_version,Config) of
+                 "dropbear" ++ _ ->
+                     ["dbclient -y -y -p ",DestPort," ",ExtraSshArg," ",iptoa(DestIP)," "];
+
+                 _ -> %% OpenSSH or compatible
+                     ["/buildroot/ssh/bin/ssh -o 'CheckHostIP=no' -o 'StrictHostKeyChecking=no' ",
+                      ExtraSshArg," -p ",DestPort," ",iptoa(DestIP)," "]
+             end]) ++ Command,
+
+    case exec(C, ExecCommand) of
+        {ok,{ExitStatus,Result}} = R when ExitStatus == 0 ->
+            case binary:match(Result, Expects) of
+                nomatch ->
+                    ct:log("Result of~n    ~s~nis~n    ~p",[ExecCommand,R]),
+                    {fail, "Bad answer"};
+                _ ->
+                    ok
+            end;
+        {ok,_} = R ->
+            ct:log("Result of~n    ~s~nis~n    ~p",[ExecCommand,R]),
+            {fail, "Exit status =/= 0"};
+        R ->
+            ct:log("Result of~n    ~s~nis~n    ~p",[ExecCommand,R]),
+            {fail, "Couldn't login to host"}
+    end.
+
+
+exec(C, Cmd) ->
+    %% ct:log("~s",[Cmd]),
+    {ok,Ch} = ssh_connection:session_channel(C, 10000),
+    success = ssh_connection:exec(C, Ch, Cmd, 10000),
+    result_of_exec(C, Ch).
+
+
+result_of_exec(C, Ch) ->
+    result_of_exec(C, Ch, undefined, <<>>).
+
+result_of_exec(C, Ch, ExitStatus, Acc) ->
+    receive
+        {ssh_cm,C,{closed,Ch}} ->
+            %%ct:log("CHAN ~p got *closed*",[Ch]),
+            {ok, {ExitStatus, Acc}};
+
+        {ssh_cm,C,{exit_status,Ch,ExStat}} when ExitStatus == undefined ->
+            %%ct:log("CHAN ~p got *exit status ~p*",[Ch,ExStat]),
+            result_of_exec(C, Ch, ExStat, Acc);
+
+        {ssh_cm,C,{data,Ch,_,Data}=_X} when ExitStatus == undefined ->
+            %%ct:log("CHAN ~p got ~p",[Ch,_X]),
+            result_of_exec(C, Ch, ExitStatus, <<Acc/binary, Data/binary>>);
+
+        _Other ->
+            %%ct:log("OTHER: ~p",[_Other]),
+            result_of_exec(C, Ch, ExitStatus, Acc)
+
+    after 5000 ->
+            ct:log("NO MORE, received so far:~n~s",[Acc]),
+            {error, timeout}
+    end.
+
+
+%%--------------------------------------------------------------------
+%%
+%% Loop through all {Tag,Alg} pairs in CommonAlgs, call DoTestFun(Tag,Alg) which
+%% returns one of {ok,C}, ok, or Other.
+%%
+%% The chk_all_algos returns 'ok' or {fail,FaledAlgosList}
+%% 
+
+chk_all_algos(FunctionName, CommonAlgs, Config, DoTestFun) when is_function(DoTestFun,2) ->
+    ct:comment("~p algorithms",[length(CommonAlgs)]),
+    %% Check each algorithm
+    Failed =
+        lists:foldl(
+          fun({Tag,Alg}, FailedAlgos) ->
+                  %% ct:log("Try ~p",[Alg]),
+                  case DoTestFun(Tag,Alg) of
+                      {ok,C} ->
+                          ssh:close(C),
+                          FailedAlgos;
+                      ok ->
+                          FailedAlgos;
+                      Other ->
+                          ct:log("FAILED! ~p ~p: ~p",[Tag,Alg,Other]),
+                          [{Alg,Other}|FailedAlgos]
+                  end
+          end, [], CommonAlgs),
+    ct:pal("~s", [format_result_table_use_all_algos(FunctionName, Config, CommonAlgs, Failed)]),
+    case Failed of
+        [] ->
+            ok;
+        _ ->
+            {fail, Failed}
+    end.
+
+
+
+%%%----------------------------------------------------------------
+%%%
+%%% Call all Funs as Fun() which returns 'ok', {ok,C} or Other.
+%%% do/1 returns 'ok' or the first encountered value that is not
+%%% successful.
+%%%
+
+do(Funs) ->
+    do(Funs, 1).
+
+do([Fun|Funs], N) ->
+    case Fun() of
+        ok ->
+            %% ct:log("Fun ~p ok",[N]),
+            do(Funs, N-1);
+        {ok,C} ->
+            %% ct:log("Fun ~p {ok,C}",[N]),
+            ssh:close(C),
+            do(Funs, N-1);
+        Other ->
+            ct:log("Fun ~p FAILED:~n~p",[N, Other]),
+            Other
+    end;
+
+do([], _) ->
+    %% ct:log("All Funs ok",[]),
+    ok.
+
+%%--------------------------------------------------------------------
+%%
+%% Functions to set up local and remote host's and user's keys and directories
+%% 
+
+setup_local_hostdir(KeyAlg, Config) ->
+    setup_local_hostdir(KeyAlg, new_dir(Config), Config).
+setup_local_hostdir(KeyAlg, HostDir, Config) ->
+    {ok, {Priv,Publ}} = host_priv_pub_keys(Config, KeyAlg),
+    %% Local private and public key
+    DstFile = filename:join(HostDir, dst_filename(host,KeyAlg)),
+    ok = file:write_file(DstFile,         Priv),
+    ok = file:write_file(DstFile++".pub", Publ),
+    HostDir.
+
+
+setup_remote_auth_keys_and_local_priv(KeyAlg, Config) ->
+    {IP,Port} = ip_port(Config),
+    setup_remote_auth_keys_and_local_priv(KeyAlg, IP, Port, new_dir(Config), Config).
+
+setup_remote_auth_keys_and_local_priv(KeyAlg, UserDir, Config) ->
+    {IP,Port} = ip_port(Config),
+    setup_remote_auth_keys_and_local_priv(KeyAlg, IP, Port, UserDir, Config).
+
+setup_remote_auth_keys_and_local_priv(KeyAlg, IP, Port, Config) ->
+    setup_remote_auth_keys_and_local_priv(KeyAlg, IP, Port, new_dir(Config), Config).
+
+setup_remote_auth_keys_and_local_priv(KeyAlg, IP, Port, UserDir, Config) ->
+    {ok, {Priv,Publ}} = user_priv_pub_keys(Config, KeyAlg),
+    %% Local private and public keys
+    DstFile = filename:join(UserDir, dst_filename(user,KeyAlg)),
+    ok = file:write_file(DstFile,         Priv),
+    ok = file:write_file(DstFile++".pub", Publ),
+    %% Remote auth_methods with public key
+    {ok,Ch,Cc} = ssh_sftp:start_channel(IP, Port, [{user,     ?USER  },
+                                                   {password, ?PASSWD   },
+                                                   {auth_methods, "password"},
+                                                   {silently_accept_hosts,true},
+                                                   {user_interaction,false}
+                                                  ]),
+    _ = ssh_sftp:make_dir(Ch, ".ssh"),
+    ok = ssh_sftp:write_file(Ch, ".ssh/authorized_keys", Publ),
+    ok = ssh_sftp:write_file_info(Ch, ".ssh/authorized_keys",  #file_info{mode=8#700}),
+    ok = ssh_sftp:write_file_info(Ch, ".ssh",  #file_info{mode=8#700}),
+    ok = ssh_sftp:stop_channel(Ch),
+    ok = ssh:close(Cc),
+    UserDir.
+
+
+setup_remote_priv_and_local_auth_keys(KeyAlg, Config) ->
+    {IP,Port} = ip_port(Config),
+    setup_remote_priv_and_local_auth_keys(KeyAlg, IP, Port, new_dir(Config), Config).
+
+setup_remote_priv_and_local_auth_keys(KeyAlg, UserDir, Config) ->
+    {IP,Port} = ip_port(Config),
+    setup_remote_priv_and_local_auth_keys(KeyAlg, IP, Port, UserDir, Config).
+
+setup_remote_priv_and_local_auth_keys(KeyAlg, IP, Port, Config) ->
+    setup_remote_priv_and_local_auth_keys(KeyAlg, IP, Port, new_dir(Config), Config).
+
+setup_remote_priv_and_local_auth_keys(KeyAlg, IP, Port, UserDir, Config) ->
+    {ok, {Priv,Publ}} = user_priv_pub_keys(Config, KeyAlg),
+    %% Local auth_methods with public key
+    AuthKeyFile = filename:join(UserDir, "authorized_keys"),
+    ok = file:write_file(AuthKeyFile, Publ),
+    %% Remote private and public key
+    {ok,Ch,Cc} = ssh_sftp:start_channel(IP, Port, [{user,     ?USER  },
+                                                   {password, ?PASSWD   },
+                                                   {auth_methods, "password"},
+                                                   {silently_accept_hosts,true},
+                                                   {user_interaction,false}
+                                                  ]),
+    _ = ssh_sftp:make_dir(Ch, ".ssh"),
+    DstFile = filename:join(".ssh", dst_filename(user,KeyAlg)),
+    ok = ssh_sftp:write_file(Ch, DstFile, Priv),
+    ok = ssh_sftp:write_file_info(Ch, DstFile,  #file_info{mode=8#700}),
+    ok = ssh_sftp:write_file(Ch, DstFile++".pub", Publ),
+    ok = ssh_sftp:write_file_info(Ch, ".ssh",  #file_info{mode=8#700}),
+    ok = ssh_sftp:stop_channel(Ch),
+    ok = ssh:close(Cc),
+    UserDir.
+
+user_priv_pub_keys(Config, KeyAlg) -> priv_pub_keys("users_keys", user, Config, KeyAlg).
+host_priv_pub_keys(Config, KeyAlg) -> priv_pub_keys("host_keys",  host, Config, KeyAlg).
+
+priv_pub_keys(KeySubDir, Type, Config, KeyAlg) ->
+    KeyDir = filename:join(proplists:get_value(data_dir,Config), KeySubDir),
+    {ok,Priv} = file:read_file(filename:join(KeyDir,src_filename(Type,KeyAlg))),
+    {ok,Publ} = file:read_file(filename:join(KeyDir,src_filename(Type,KeyAlg)++".pub")),
+    {ok, {Priv,Publ}}.
+
+
+%%%---------------- The default filenames
+src_filename(user, 'ssh-rsa'            ) -> "id_rsa";
+src_filename(user, 'rsa-sha2-256'       ) -> "id_rsa";
+src_filename(user, 'rsa-sha2-512'       ) -> "id_rsa";
+src_filename(user, 'ssh-dss'            ) -> "id_dsa";
+src_filename(user, 'ecdsa-sha2-nistp256') -> "id_ecdsa256";
+src_filename(user, 'ecdsa-sha2-nistp384') -> "id_ecdsa384";
+src_filename(user, 'ecdsa-sha2-nistp521') -> "id_ecdsa521";
+src_filename(host, 'ssh-rsa'            ) -> "ssh_host_rsa_key";
+src_filename(host, 'rsa-sha2-256'       ) -> "ssh_host_rsa_key";
+src_filename(host, 'rsa-sha2-512'       ) -> "ssh_host_rsa_key";
+src_filename(host, 'ssh-dss'            ) -> "ssh_host_dsa_key";
+src_filename(host, 'ecdsa-sha2-nistp256') -> "ssh_host_ecdsa_key256";
+src_filename(host, 'ecdsa-sha2-nistp384') -> "ssh_host_ecdsa_key384";
+src_filename(host, 'ecdsa-sha2-nistp521') -> "ssh_host_ecdsa_key521".
+
+dst_filename(user, 'ssh-rsa'            ) -> "id_rsa";
+dst_filename(user, 'rsa-sha2-256'       ) -> "id_rsa";
+dst_filename(user, 'rsa-sha2-512'       ) -> "id_rsa";
+dst_filename(user, 'ssh-dss'            ) -> "id_dsa";
+dst_filename(user, 'ecdsa-sha2-nistp256') -> "id_ecdsa";
+dst_filename(user, 'ecdsa-sha2-nistp384') -> "id_ecdsa";
+dst_filename(user, 'ecdsa-sha2-nistp521') -> "id_ecdsa";
+dst_filename(host, 'ssh-rsa'            ) -> "ssh_host_rsa_key";
+dst_filename(host, 'rsa-sha2-256'       ) -> "ssh_host_rsa_key";
+dst_filename(host, 'rsa-sha2-512'       ) -> "ssh_host_rsa_key";
+dst_filename(host, 'ssh-dss'            ) -> "ssh_host_dsa_key";
+dst_filename(host, 'ecdsa-sha2-nistp256') -> "ssh_host_ecdsa_key";
+dst_filename(host, 'ecdsa-sha2-nistp384') -> "ssh_host_ecdsa_key";
+dst_filename(host, 'ecdsa-sha2-nistp521') -> "ssh_host_ecdsa_key".
+
+
+%%--------------------------------------------------------------------
+%%
+%% Format the result table for chk_all_algos/4
+%% 
+format_result_table_use_all_algos(FunctionName, Config, CommonAlgs, Failed) ->
+    %% Write a nice table with the result
+    AlgHead = 'Algorithm',
+    AlgWidth = lists:max([length(atom_to_list(A)) || {_,A} <- CommonAlgs]),
+    {ResultTable,_} =
+        lists:mapfoldl(
+          fun({T,A}, Tprev) ->
+                  Tag = case T of
+                            Tprev -> "";
+                            _ -> io_lib:format('~s~n',[T])
+                        end,
+                  {io_lib:format('~s     ~*s ~s~n',
+                                 [Tag, -AlgWidth, A,
+                                  case proplists:get_value(A,Failed) of
+                                      undefined -> "(ok)";
+                                      Err -> io_lib:format("<<<< FAIL <<<< ~p",[Err])
+                                  end]),
+                   T}
+          end, undefined, CommonAlgs),
+
+    Vssh = proplists:get_value(ssh_version,Config,""),
+    io_lib:format("~nResults of ~p, Peer version: ~s~n~n"
+                  "Tag  ~*s Result~n"
+                  "=====~*..=s=======~n~s"
+                 ,[FunctionName, Vssh,
+                   -AlgWidth, AlgHead,
+                   AlgWidth, "", ResultTable]).
+
+%%--------------------------------------------------------------------
+%%
+%% Docker handling: start_docker/1 and stop_docker/1
+%% 
+start_docker(Ver) ->
+    Cmnd = lists:concat(["docker run -itd --rm -p 1234 ",?DOCKER_PFX,":",Ver]),
+    Id0 = os:cmd(Cmnd),
+    ct:log("Ver = ~p, Cmnd ~p~n-> ~p",[Ver,Cmnd,Id0]),
+    case is_docker_sha(Id0) of
+        true ->
+            Id = hd(string:tokens(Id0, "\n")),
+            IP = ip(Id),
+            Port = 1234,
+            {ok, {Ver,{IP,Port},Id}};
+        false ->
+            throw(cant_start_docker)
+    end.
+
+
+stop_docker({_Ver,_,Id}) ->
+    Cmnd = lists:concat(["docker kill ",Id]),
+    os:cmd(Cmnd).
+
+is_docker_sha(L) ->
+    lists:all(fun(C) when $a =< C,C =< $z -> true;
+                 (C) when $0 =< C,C =< $9 -> true;
+                 ($\n) -> true;
+                 (_) -> false
+              end, L).
+
+%%--------------------------------------------------------------------
+%%
+%% Misc docker info functions
+
+ip_port(Config) ->
+    {_Ver,{IP,Port},_} = proplists:get_value(id,Config),
+    {IP,Port}.
+
+port_mapped_to(Id) ->
+    Cmnd = lists:concat(["docker ps --format \"{{.Ports}}\"  --filter id=",Id]),
+    [_, PortStr | _] = string:tokens(os:cmd(Cmnd), ":->/"),
+    list_to_integer(PortStr).
+
+ip(Id) ->
+    Cmnd = lists:concat(["docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' ",
+			 Id]),
+    IPstr0 = os:cmd(Cmnd),
+    ct:log("Cmnd ~p~n-> ~p",[Cmnd,IPstr0]),
+    IPstr = hd(string:tokens(IPstr0, "\n")),
+    {ok,IP} = inet:parse_address(IPstr),
+    IP.
+
+%%--------------------------------------------------------------------
+%%
+%%  Normalize the host returned from ssh_test_lib
+
+iptoa({0,0,0,0}) -> inet_parse:ntoa(host_ip());
+iptoa(IP) -> inet_parse:ntoa(IP).
+
+host_ip() ->
+    {ok,Name} = inet:gethostname(),
+    {ok,#hostent{h_addr_list = [IP|_]}} = inet_res:gethostbyname(Name),
+    IP.
+
+%%--------------------------------------------------------------------
+%%
+%% Create a new fresh directory or clear an existing one
+%% 
+
+new_dir(Config) ->
+    PrivDir = proplists:get_value(priv_dir, Config),
+    SubDirName = integer_to_list(erlang:system_time()),
+    Dir = filename:join(PrivDir, SubDirName),
+    case file:read_file_info(Dir) of
+        {error,enoent} ->
+            ok = file:make_dir(Dir),
+            Dir;
+        _ ->
+            timer:sleep(25),
+            new_dir(Config)
+    end.
+
+clear_dir(Dir) ->
+    delete_all_contents(Dir),
+    {ok,[]} = file:list_dir(Dir),
+    Dir.
+
+delete_all_contents(Dir) ->
+    {ok,Fs} = file:list_dir(Dir),
+    lists:map(fun(F0) ->
+                      F = filename:join(Dir, F0),
+                      case filelib:is_file(F) of
+                          true ->
+                              file:delete(F);
+                          false ->
+                              case filelib:is_dir(F) of
+                                  true ->
+                                      delete_all_contents(F),
+                                      file:del_dir(F);
+                                  false ->
+                                      ct:log("Neither file nor dir: ~p",[F])
+                              end
+                      end
+              end, Fs).
+
+%%--------------------------------------------------------------------
+%%
+%% Find the intersection of algoritms for otp ssh and the docker ssh.
+%% Returns {ok, ServerHello, Server, ClientHello, Client} where Server are the algorithms common
+%% with the docker server and analogous for Client.
+%%
+%% Client may be undefined if no usable client is found.
+%%
+%% Both Server and Client are lists of {Tag,AlgName}.
+%% 
+
+common_algs(Config, IP, Port) ->
+    case remote_server_algs(IP, Port) of
+        {ok, {ServerHello, RemoteServerKexInit}} ->
+            RemoteServerAlgs = kexint_msg2default_algorithms(RemoteServerKexInit),
+            Server = find_common_algs(RemoteServerAlgs,
+                                      use_algorithms(ServerHello)),
+            ct:log("Remote server:~n~p~n~p",[ServerHello, RemoteServerAlgs]),
+            case remote_client_algs(Config) of
+                {ok,{ClientHello,RemoteClientKexInit}} ->
+                    RemoteClientAlgs = kexint_msg2default_algorithms(RemoteClientKexInit),
+                    Client = find_common_algs(RemoteClientAlgs,
+                                              use_algorithms(ClientHello)),
+                    ct:log("Remote client:~n~p~n~p",[ClientHello, RemoteClientAlgs]),
+                    {ok, ServerHello, Server, ClientHello, Client};
+                {error,_} =TO ->
+                    ct:log("Remote client algs can't be found: ~p",[TO]),
+                    {ok, ServerHello, Server, undefined, undefined};
+                Other ->
+                    Other
+            end;
+        Other ->
+            Other
+    end.
+
+
+chk_hellos(Hs, Str) ->
+    lists:foldl(
+      fun(H, Acc) ->
+              try binary:split(H, <<"-">>, [global])
+              of
+                  %% [<<"SSH">>,<<"2.0">>|_] ->
+                  %%     Acc;
+                  [<<"SSH">>,OldVer = <<"1.",_/binary>>|_] ->
+                      io_lib:format("~s, Old SSH ver ~s",[Acc,OldVer]);
+                  _ ->
+                      Acc
+              catch
+                  _:_ ->
+                      Acc
+              end
+      end, Str, Hs).
+              
+
+find_common_algs(Remote, Local) ->
+    [{T,V} || {T,Vs} <- ssh_test_lib:extract_algos(
+                          ssh_test_lib:intersection(Remote,
+                                                    Local)),
+              V <- Vs].
+
+
+use_algorithms(RemoteHelloBin) ->
+    MyAlgos = ssh:chk_algos_opts(
+                [{modify_algorithms,
+                  [{append,
+                    [{kex,['diffie-hellman-group1-sha1']}
+                    ]}
+                  ]}
+                ]),
+    ssh_transport:adjust_algs_for_peer_version(binary_to_list(RemoteHelloBin)++"\r\n",
+                                               MyAlgos).
+
+kexint_msg2default_algorithms(#ssh_msg_kexinit{kex_algorithms = Kex,
+                                               server_host_key_algorithms = PubKey,
+                                               encryption_algorithms_client_to_server = CipherC2S,
+                                               encryption_algorithms_server_to_client = CipherS2C,
+                                               mac_algorithms_client_to_server = MacC2S,
+                                               mac_algorithms_server_to_client = MacS2C,
+                                               compression_algorithms_client_to_server = CompC2S,
+                                               compression_algorithms_server_to_client = CompS2C
+                                              }) ->
+    [{kex,         ssh_test_lib:to_atoms(Kex)},
+     {public_key,  ssh_test_lib:to_atoms(PubKey)},
+     {cipher,      [{client2server,ssh_test_lib:to_atoms(CipherC2S)},
+                    {server2client,ssh_test_lib:to_atoms(CipherS2C)}]},
+     {mac,         [{client2server,ssh_test_lib:to_atoms(MacC2S)},
+                    {server2client,ssh_test_lib:to_atoms(MacS2C)}]},
+     {compression, [{client2server,ssh_test_lib:to_atoms(CompC2S)},
+                    {server2client,ssh_test_lib:to_atoms(CompS2C)}]}].
+
+
+%%--------------------------------------------------------------------
+%%
+%% Find the algorithms supported by the remote server
+%%
+%% Connect with tcp to the server, send a hello and read the returned
+%% server hello and kexinit message.
+%% 
+remote_server_algs(IP, Port) ->
+    case try_gen_tcp_connect(IP, Port, 5) of
+        {ok,S} ->
+            ok = gen_tcp:send(S, "SSH-2.0-CheckAlgs\r\n"),
+            receive_hello(S);
+        {error,Error} ->
+            {error,Error}
+    end.
+
+try_gen_tcp_connect(IP, Port, N) when N>0 ->
+    case gen_tcp:connect(IP, Port, [binary]) of
+        {ok,S} ->
+            {ok,S};
+        {error,_Error} when N>1 ->
+            receive after 1000 -> ok end,
+            try_gen_tcp_connect(IP, Port, N-1);
+        {error,Error} ->
+            {error,Error}
+    end;
+try_gen_tcp_connect(_, _, _) ->
+    {error, "No contact"}.
+
+
+%%--------------------------------------------------------------------
+%%
+%% Find the algorithms supported by the remote client
+%%
+%% Set up a fake ssh server and make the remote client connect to it. Use
+%% hello message and the kexinit message.
+%% 
+remote_client_algs(Config) ->
+    Parent = self(),
+    Ref = make_ref(),
+    spawn(
+      fun() ->
+              {ok,Sl} = gen_tcp:listen(0, [binary]),
+              {ok,{IP,Port}} = inet:sockname(Sl),
+              Parent ! {addr,Ref,IP,Port},
+              {ok,S} = gen_tcp:accept(Sl),
+              ok = gen_tcp:send(S, "SSH-2.0-CheckAlgs\r\n"),
+              Parent ! {Ref,receive_hello(S)}
+      end),
+    receive
+        {addr,Ref,IP,Port} ->
+            spawn(fun() ->
+                          exec_from_docker(Config, IP, Port,
+                                           "howdy.\r\n",
+                                           [<<"howdy">>],
+                                           "")
+                  end),
+            receive
+                {Ref, Result} ->
+                    Result
+            after 5000 ->
+                    {error, {timeout,2}}
+            end
+    after 5000 ->
+            {error, {timeout,1}}
+    end.
+
+
+%%% Receive a few packets from the remote server or client and find what is supported:
+
+receive_hello(S) ->
+    try
+        receive_hello(S, <<>>)
+    of
+        Result ->
+            Result
+    catch
+        Class:Error ->
+            ST = erlang:get_stacktrace(),
+            {error, {Class,Error,ST}}
+    end.
+        
+
+receive_hello(S, Ack) ->
+    %% The Ack is to collect bytes until the full message is received
+    receive
+        {tcp, S, Bin0} when is_binary(Bin0) ->
+            case binary:split(<<Ack/binary, Bin0/binary>>, [<<"\r\n">>,<<"\r">>,<<"\n">>]) of
+                [Hello = <<"SSH-2.0-",_/binary>>, NextPacket] ->
+                    %% ct:log("Got 2.0 hello (~p), ~p bytes to next msg",[Hello,size(NextPacket)]),
+                    {ok, {Hello, receive_kexinit(S, NextPacket)}};
+
+                [Hello = <<"SSH-1.99-",_/binary>>, NextPacket] ->
+                    %% ct:log("Got 1.99 hello (~p), ~p bytes to next msg",[Hello,size(NextPacket)]),
+                    {ok, {Hello, receive_kexinit(S, NextPacket)}};
+
+                [Bin] when size(Bin) < 256 ->
+                    %% ct:log("Got part of hello (~p chars):~n~s~n~s",[size(Bin),Bin,
+                    %%                                                 [io_lib:format('~2.16.0b ',[C])
+                    %%                                                  || C <- binary_to_list(Bin0)
+                    %%                                                 ]
+                    %%                                                ]),
+                    receive_hello(S, Bin0);
+
+                _ ->
+                    ct:log("Bad hello string (line ~p, ~p chars):~n~s~n~s",[?LINE,size(Bin0),Bin0,
+                                                                  [io_lib:format('~2.16.0b ',[C])
+                                                                   || C <- binary_to_list(Bin0)
+                                                                  ]
+                                                                 ]),
+                    ct:fail("Bad hello string received")
+            end;
+        Other ->
+            ct:log("Bad hello string (line ~p):~n~p",[?LINE,Other]),
+            ct:fail("Bad hello string received")
+
+    after 10000 ->
+            ct:log("Timeout waiting for hello!~n~s",[Ack]),
+            throw(timeout)
+    end.
+
+
+receive_kexinit(_S, <<PacketLen:32, PaddingLen:8, PayloadAndPadding/binary>>)
+  when PacketLen < 5000, % heuristic max len to stop huge attempts if packet decodeing get out of sync
+       size(PayloadAndPadding) >= (PacketLen-1) % Need more bytes?
+       ->
+    ct:log("Has all ~p packet bytes",[PacketLen]),
+    PayloadLen = PacketLen - PaddingLen - 1,
+    <<Payload:PayloadLen/binary, _Padding:PaddingLen/binary>> = PayloadAndPadding,
+    ssh_message:decode(Payload);
+
+receive_kexinit(S, Ack) ->
+    ct:log("Has ~p bytes, need more",[size(Ack)]),
+    receive
+        {tcp, S, Bin0} when is_binary(Bin0) ->
+            receive_kexinit(S, <<Ack/binary, Bin0/binary>>);
+        Other ->
+            ct:log("Bad hello string (line ~p):~n~p",[?LINE,Other]),
+            ct:fail("Bad hello string received")
+
+    after 10000 ->
+            ct:log("Timeout waiting for kexinit!~n~s",[Ack]),
+            throw(timeout)
+    end.
+
+%%%----------------------------------------------------------------
+%%% Test of sftp from the OpenSSH client side
+%%%
+
+sftp_tests_erl_server(Config, ServerIP, ServerPort, ServerRootDir, UserDir) ->
+    try
+        Cmnds = prepare_local_directory(ServerRootDir),
+        call_sftp_in_docker(Config, ServerIP, ServerPort, Cmnds, UserDir),
+        check_local_directory(ServerRootDir)
+    catch
+        Class:Error ->
+            ST = erlang:get_stacktrace(),
+            {error, {Class,Error,ST}}
+    end.
+
+
+prepare_local_directory(ServerRootDir) ->
+    file:write_file(filename:join(ServerRootDir,"tst1"),
+                    <<"Some test text">>
+                   ),
+    ["get tst1",
+     "put tst1 tst2",
+     "put tst1 tst3",
+     "rename tst1 ex_tst1",
+     "rm tst3",
+     "mkdir mydir",
+     "cd mydir",
+     "put tst1 file_1",
+     "put tst1 unreadable_file",
+     "chmod 222 unreadable_file",
+     "exit"].
+
+check_local_directory(ServerRootDir) ->
+    case lists:sort(ok(file:list_dir(ServerRootDir)) -- [".",".."]) of
+        ["ex_tst1","mydir","tst2"] ->
+            {ok,Expect} = file:read_file(filename:join(ServerRootDir,"ex_tst1")),
+            case file:read_file(filename:join(ServerRootDir,"tst2")) of
+                {ok,Expect} ->
+                    case lists:sort(ok(file:list_dir(filename:join(ServerRootDir,"mydir"))) -- [".",".."]) of
+                        ["file_1","unreadable_file"] ->
+                            case file:read_file(filename:join([ServerRootDir,"mydir","file_1"])) of
+                                {ok,Expect} ->
+                                    case file:read_file(filename:join([ServerRootDir,"mydir","unreadable_file"])) of
+                                        {error,_} ->
+                                            ok;
+                                        {ok,_} ->
+                                            {error, {could_read_unreadable,"mydir/unreadable_file"}}
+                                    end;
+                                {ok,Other} ->
+                                    ct:log("file_1:~n~s~nExpected:~n~s",[Other,Expect]),
+                                    {error, {bad_contents_in_file,"mydir/file_1"}}
+                            end;
+                        Other ->
+                            ct:log("Directory ~s~n~p",[filename:join(ServerRootDir,"mydir"),Other]),
+                            {error,{bad_dir_contents,"mydir"}}
+                    end;
+                {ok,Other} ->
+                    ct:log("tst2:~n~s~nExpected:~n~s",[Other,Expect]),
+                    {error, {bad_contents_in_file,"tst2"}}
+            end;
+        ["tst1"] ->
+            {error,{missing_file,"tst2"}};
+        Other ->
+            ct:log("Directory ~s~n~p",[ServerRootDir,Other]),
+            {error,{bad_dir_contents,"/"}}
+    end.
+
+call_sftp_in_docker(Config, ServerIP, ServerPort, Cmnds, UserDir) ->
+    {DockerIP,DockerPort} = ip_port(Config),
+    {ok,C} = ssh:connect(DockerIP, DockerPort,
+                         [{user,?USER},
+                          {password,?PASSWD},
+                          {user_dir, UserDir},
+                          {silently_accept_hosts,true},
+                          {user_interaction,false}
+                         ]),
+
+    %% Make commands for "expect" in the docker:
+    PreExpectCmnds = ["spawn /buildroot/ssh/bin/sftp -oPort="++integer_to_list(ServerPort)++
+                          " -oCheckHostIP=no -oStrictHostKeyChecking=no " ++
+                          iptoa(ServerIP)++"\n"
+                     ],
+    PostExpectCmnds= [],
+    ExpectCmnds = 
+        PreExpectCmnds ++
+        ["expect \"sftp>\" {send \""++Cmnd++"\n\"}\n" || Cmnd <- Cmnds] ++
+        PostExpectCmnds,
+    
+    %% Make an commands file in the docker
+    {ok,Ch} = ssh_sftp:start_channel(C, [{timeout,10000}]),
+    ok = ssh_sftp:write_file(Ch, "commands", erlang:iolist_to_binary(ExpectCmnds)),
+    ok = ssh_sftp:stop_channel(Ch),
+
+    %% Call expect in the docker
+    {ok, Ch1} = ssh_connection:session_channel(C, infinity),
+    Kex1 = renegotiate_test(init, C),
+    success = ssh_connection:exec(C, Ch1, "expect commands", infinity),
+
+    renegotiate_test(Kex1, C),
+    recv_log_msgs(C, Ch1),
+
+    %% Done.
+    ssh:close(C).
+
+recv_log_msgs(C, Ch) ->
+    receive
+        {ssh_cm,C,{closed,Ch}} ->
+            %% ct:log("Channel closed ~p",[{closed,1}]),
+            ok;
+        {ssh_cm,C,{data,Ch,1,Msg}} ->
+            ct:log("*** ERROR from docker:~n~s",[Msg]),
+            recv_log_msgs(C, Ch);
+        {ssh_cm,C,_Msg} ->
+            %% ct:log("Got ~p",[_Msg]),
+            recv_log_msgs(C, Ch)
+    end.
+
+%%%----------------------------------------------------------------
+%%%----------------------------------------------------------------
+%%%
+%%% Tests from the Erlang client side
+%%%
+%%%----------------------------------------------------------------
+%%%----------------------------------------------------------------
+test_erl_client_reneg({ok,C}, Spec) ->
+    %% Start the test processes on the connection C:
+    Parent = self(),
+    Pids = [spawn(
+              fun() ->
+                      Parent ! {self(), TestType, Id, one_test_erl_client(TestType,Id,C)}
+              end
+             ) 
+            || {TestType,N} <- Spec,
+               Id <- lists:seq(1,N)],
+
+    Kex1 = renegotiate_test(init, C),
+
+    %% Collect the results:
+    case lists:filter(
+           fun(R) -> R=/=ok end,
+           [receive
+                {Pid,_TestType,_Id,ok} ->
+                    %% ct:log("Test ~p:~p passed!", [_TestType,_Id]),
+                    ok;
+                {Pid,TestType,Id,OtherResult} ->
+                    ct:log("~p:~p ~p ~p~n~p",[?MODULE,?LINE,TestType,Id,OtherResult]),
+                    {error,TestType,Id}
+            end || Pid <- Pids])
+    of
+        [] ->
+            renegotiate_test(Kex1, C),
+            {ok,C};
+        Other ->
+            renegotiate_test(Kex1, C),
+            Other
+    end;
+
+test_erl_client_reneg(Error, _) ->
+    Error.
+
+
+one_test_erl_client(exec, Id, C) ->
+    {ok, Ch} = ssh_connection:session_channel(C, infinity),
+    success = ssh_connection:exec(C, Ch, "echo Hi there", 5000),
+    case loop_until(fun({eof,_}) -> true;
+                       (_      ) -> false
+                    end,
+                    fun(Acc) ->
+                            receive
+                                {ssh_cm, C, {eof,Ch}} ->
+                                    {eof,Acc};
+                                {ssh_cm, C, {data,Ch,0,B}} when is_binary(B) ->
+                                    <<Acc/binary, B/binary>>
+                            end
+                    end,
+                    <<>>) of
+        {eof,<<"Hi there\n">>} ->
+            ok;
+        Other ->
+            ct:pal("exec Got other ~p", [Other]),
+            {error, {exec,Id,bad_msg,Other,undefined}}
+    end;
+
+one_test_erl_client(no_subsyst, Id, C) ->
+    {ok, Ch} = ssh_connection:session_channel(C, infinity),
+    case ssh_connection:subsystem(C, Ch, "foo", infinity) of
+        failure ->
+            ok;
+        Other ->
+            ct:pal("no_subsyst Got other ~p", [Other]),
+            {error, {no_subsyst,Id,bad_ret,Other,undefined}}
+    end;
+
+one_test_erl_client(setenv, Id, C) ->
+    {ok, Ch} = ssh_connection:session_channel(C, infinity),
+    Var = "ENV_TEST",
+    Value = lists:concat(["env_test_",Id,"_",erlang:system_time()]),
+    Env = case ssh_connection:setenv(C, Ch, Var, Value, infinity) of
+	      success -> binary_to_list(Value++"\n");
+	      failure -> <<"\n">>
+	  end,
+    success = ssh_connection:exec(C, Ch, "echo $"++Var, 5000),
+    case loop_until(fun({eof,_}) -> true;
+                       (_      ) -> false
+                    end,
+                    fun(Acc) ->
+                            receive
+                                {ssh_cm, C, {eof,Ch}} ->
+                                    {eof,Acc};
+                                {ssh_cm, C, {data,Ch,0,B}} when is_binary(B) ->
+                                    <<Acc/binary, B/binary>>
+                            end
+                    end,
+                    <<>>) of
+        {eof,Env} ->
+            ok;
+        Other ->
+            ct:pal("setenv Got other ~p", [Other]),
+            {error, {setenv,Id,bad_msg,Other,undefined}}
+    end;
+
+one_test_erl_client(SFTP, Id, C) when SFTP==sftp ; SFTP==sftp_async ->
+    try
+        {ok,Ch} = ssh_sftp:start_channel(C, [{timeout,10000}]),
+        %% A new fresh name of a new file tree:
+        RootDir = lists:concat(["r_",Id,"_",erlang:system_time()]),
+        %% Check that it does not exist:
+        false = lists:member(RootDir, ok(ssh_sftp:list_dir(Ch, "."))),
+        %% Create it:
+        ok = ssh_sftp:make_dir(Ch, RootDir),
+        {ok, #file_info{type=directory, access=read_write}} = ssh_sftp:read_file_info(Ch, RootDir),
+        R = do_sftp_tests_erl_client(SFTP, C, Ch, Id, RootDir),
+        catch ssh_sftp:stop_channel(Ch),
+        R
+    catch
+        Class:Error ->
+            ST = erlang:get_stacktrace(),
+            {error, {SFTP,Id,Class,Error,ST}}
+    end.
+
+
+
+do_sftp_tests_erl_client(sftp_async, _C, Ch, _Id, RootDir) ->
+    FileName1 = "boring_name",
+    F1 = filename:join(RootDir, FileName1),
+    %% Open a new handle and start writing:
+    {ok,Handle1} = ssh_sftp:open(Ch, F1, [write,binary]),
+    {async,Aref1} = ssh_sftp:awrite(Ch, Handle1, <<0:250000/unsigned-unit:8>>),
+    wait_for_async_result(Aref1);
+
+do_sftp_tests_erl_client(sftp, _C, Ch, _Id, RootDir) ->
+    FileName0 = "f0",
+    F0 = filename:join(RootDir, FileName0),
+
+    %% Create and write a file:
+    ok = ssh_sftp:write_file(Ch,
+                             F0 = filename:join(RootDir, FileName0),
+                             Data0 = mkbin(1234,240)),
+    {ok,Data0} = ssh_sftp:read_file(Ch, F0),
+    {ok, #file_info{type=regular, access=read_write, size=1234}} = ssh_sftp:read_file_info(Ch, F0),
+
+    %% Re-write:
+    {ok,Handle0} = ssh_sftp:open(Ch, F0, [write,read,binary]),
+    ok = ssh_sftp:pwrite(Ch, Handle0, 16, Data0_1=mkbin(10,255)),
+
+    <<B1:16/binary, _:10/binary, B2:(1234-26)/binary>> = Data0,
+    FileContents = <<B1:16/binary, Data0_1:10/binary, B2:(1234-26)/binary>>,
+
+    <<_:1/binary, Part:25/binary, _/binary>> = FileContents,
+    {ok, Part} = ssh_sftp:pread(Ch, Handle0, 1, 25),
+
+    %% Check:
+    {ok, FileContents} = ssh_sftp:pread(Ch, Handle0, 0, 1234),
+    ok = ssh_sftp:close(Ch, Handle0),
+
+    %% Check in another way:
+    {ok, FileContents} = ssh_sftp:read_file(Ch, F0),
+
+    %% Remove write access rights and check that it can't be written:
+    ok = ssh_sftp:write_file_info(Ch, F0, #file_info{mode=8#400}), %read}),
+    {ok, #file_info{type=regular, access=read}} = ssh_sftp:read_file_info(Ch, F0),
+    {error,permission_denied} = ssh_sftp:write_file(Ch, F0, mkbin(10,14)),
+
+    %% Test deletion of file and dir:
+    [FileName0] = ok(ssh_sftp:list_dir(Ch, RootDir)) -- [".", ".."],
+    ok = ssh_sftp:delete(Ch, F0),
+    [] = ok(ssh_sftp:list_dir(Ch, RootDir)) -- [".", ".."],
+    ok = ssh_sftp:del_dir(Ch, RootDir),
+    false = lists:member(RootDir, ok(ssh_sftp:list_dir(Ch, "."))),
+    ok.
+
+
+wait_for_async_result(Aref) ->
+    receive
+        {async_reply, Aref, Result} ->
+            Result
+    after
+        60000 ->
+            timeout
+    end.
+
+
+mkbin(Size, Byte) ->
+    list_to_binary(lists:duplicate(Size,Byte)).
+
+ok({ok,X}) -> X.
+    
+%%%----------------------------------------------------------------
+renegotiate_test(init, ConnectionRef) ->
+    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
+    ssh_connection_handler:renegotiate(ConnectionRef),
+    %%ct:log("Renegotiate test initiated!",[]),
+    Kex1;
+
+renegotiate_test(Kex1, ConnectionRef) ->
+    case ssh_test_lib:get_kex_init(ConnectionRef) of
+        Kex1 ->
+            ct:log("Renegotiate test failed, Kex1 == Kex2!",[]),
+            error(renegotiate_failed);
+        _ ->
+            %% ct:log("Renegotiate test passed!",[]),
+            ok
+    end.
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-base-image b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-base-image
new file mode 100755
index 0000000000..1cb7bf33e1
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-base-image
@@ -0,0 +1,38 @@
+#!/bin/sh
+
+UBUNTU_VER=${1:-16.04}
+
+USER=sshtester
+PWD=foobar
+
+docker build \
+    -t ubuntubuildbase \
+    --build-arg https_proxy=$HTTPS_PROXY \
+    --build-arg http_proxy=$HTTP_PROXY \
+    - <<EOF
+
+    FROM ubuntu:$UBUNTU_VER
+    WORKDIR /buildroot
+
+    # Prepare for installing OpenSSH
+    RUN apt-get update
+    RUN apt-get upgrade -y
+    RUN apt-get -y install apt-utils
+    RUN apt-get -y install build-essential zlib1g-dev
+    RUN apt-get -y install sudo iputils-ping tcptraceroute net-tools
+    RUN apt-get -y install sshpass expect
+    RUN apt-get -y install libpam0g-dev
+
+    # A user for the tests
+    RUN (echo $PWD; echo $PWD; echo; echo; echo; echo; echo; echo ) | adduser $USER
+    RUN adduser $USER sudo
+
+    # Prepare the privsep preauth environment for openssh
+    RUN  mkdir -p /var/empty
+    RUN  chown root:sys /var/empty
+    RUN  chmod 755 /var/empty
+    RUN  groupadd -f sshd
+    RUN  ls /bin/false
+    RUN  id -u sshd 2> /dev/null || useradd -g sshd -c 'sshd privsep' -d /var/empty -s /bin/false sshd
+
+EOF
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-dropbear-ssh b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-dropbear-ssh
new file mode 100755
index 0000000000..85973081d0
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-dropbear-ssh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# ./create-dropbear-ssh
+
+# This way of fetching the tar-file separate from the docker commands makes
+# http-proxy handling way easier. The wget command handles the $https_proxy
+# variable while the docker command must have /etc/docker/something changed
+# and the docker server restarted. That is not possible without root access.
+
+# Make a Dockerfile. This method simplifies env variable handling considerably:
+cat - > TempDockerFile <<EOF
+
+    FROM ubuntubuildbase
+
+    WORKDIR /buildroot
+
+    RUN apt-get -y update
+    RUN apt-get -y upgrade
+    RUN apt-get -y install openssh-sftp-server
+%%    RUN echo 81 | apt-get -y install dropbear
+
+EOF
+
+# Build the image:
+docker build -t ssh_compat_suite-ssh-dropbear -f ./TempDockerFile .
+
+# Cleaning
+rm -fr ./TempDockerFile $TMP
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-dropbear-ssh-run b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-dropbear-ssh-run
new file mode 100755
index 0000000000..d98c0cfaa3
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-dropbear-ssh-run
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+# ./create-dropbear-ssh-run
+
+VER=v2016.72
+
+# This way of fetching the tar-file separate from the docker commands makes
+# http-proxy handling way easier. The wget command handles the $https_proxy
+# variable while the docker command must have /etc/docker/something changed
+# and the docker server restarted. That is not possible without root access.
+
+# Make a Dockerfile. This method simplifies env variable handling considerably:
+cat - > TempDockerFile <<EOF
+
+    FROM ssh_compat_suite-ssh-dropbear-installed:${VER}
+
+    WORKDIR /buildroot
+
+    CMD dropbear -F -p 1234
+
+EOF
+
+# Build the image:
+docker build -t ssh_compat_suite-ssh:dropbear${VER} -f ./TempDockerFile .
+
+# Cleaning
+rm -fr ./TempDockerFile $TMP
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-ssh-image b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-ssh-image
new file mode 100755
index 0000000000..2e08408841
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-ssh-image
@@ -0,0 +1,72 @@
+#!/bin/sh
+
+# ./create-image openssh 7.3p1 openssl 1.0.2m
+
+set -x
+
+case $1 in
+    openssh)
+	FAMssh=openssh
+	VERssh=$2
+	PFX=https://ftp.eu.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-
+	SFX=.tar.gz
+	TMP=tmp.tar.gz
+	;;
+    *)
+	echo "Unsupported: $1"
+	exit
+esac
+
+FAMssl=$3
+VERssl=$4
+
+VER=${FAMssh}${VERssh}-${FAMssl}${VERssl}
+
+# This way of fetching the tar-file separate from the docker commands makes
+# http-proxy handling way easier. The wget command handles the $https_proxy
+# variable while the docker command must have /etc/docker/something changed
+# and the docker server restarted. That is not possible without root access.
+
+# Make a Dockerfile. This method simplifies env variable handling considerably:
+cat - > TempDockerFile <<EOF
+
+    FROM  ssh_compat_suite-${FAMssl}:${VERssl}
+
+    LABEL openssh-version=${VER}
+
+    WORKDIR /buildroot
+
+    COPY ${TMP} .
+    RUN  tar xf ${TMP}
+
+    # Build and install
+
+    WORKDIR ${FAMssh}-${VERssh}
+
+    # Probably VERY OpenSSH dependent...:
+    RUN ./configure --without-pie \
+                    --prefix=/buildroot/ssh \
+                    --with-ssl-dir=/buildroot/ssl \
+                    --with-pam \
+                    LDFLAGS=-Wl,-R/buildroot/ssl/lib
+    RUN  make
+    RUN  make install
+    RUN  echo UsePAM yes >> /buildroot/ssh/etc/sshd_config
+
+    RUN echo Built ${VER}
+
+    # Start the daemon, but keep it in foreground to avoid killing the container
+    CMD /buildroot/ssh/sbin/sshd -D -p 1234
+
+EOF
+
+# Fetch the tar file. This could be done in an "ADD ..." in the Dockerfile,
+# but then we hit the proxy problem...
+wget -O $TMP $PFX$VERssh$SFX
+
+# Build the image:
+docker build -t  ssh_compat_suite-ssh:$VER -f ./TempDockerFile .
+
+# Cleaning
+rm -fr ./TempDockerFile $TMP
+
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-ssl-image b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-ssl-image
new file mode 100755
index 0000000000..4ab2a8bddc
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create-ssl-image
@@ -0,0 +1,71 @@
+#!/bin/sh
+
+# ./create-image openssl 1.0.2m
+
+case "$1" in
+    "openssl")
+	FAM=openssl
+	VER=$2
+	PFX=https://www.openssl.org/source/openssl-
+	SFX=.tar.gz
+	TMP=tmp.tar.gz
+	;;
+    "libressl")
+	FAM=libressl
+	VER=$2
+	PFX=https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-
+	SFX=.tar.gz
+	TMP=tmp.tar.gz
+	;;
+    *)
+	echo No lib type
+	exit
+	;;
+esac
+
+case $1$2 in
+    openssl0.9.8[a-l])
+        CONFIG_FLAGS=no-asm
+	;;
+    *)
+	CONFIG_FLAGS=
+	;;
+esac
+
+
+# This way of fetching the tar-file separate from the docker commands makes
+# http-proxy handling way easier. The wget command handles the $https_proxy
+# variable while the docker command must have /etc/docker/something changed
+# and the docker server restarted. That is not possible without root access.
+
+# Make a Dockerfile. This method simplifies env variable handling considerably:
+cat - > TempDockerFile <<EOF
+
+    FROM ubuntubuildbase
+
+    LABEL version=$FAM-$VER
+
+    WORKDIR /buildroot
+
+    COPY ${TMP} .
+    RUN  tar xf ${TMP}
+
+    WORKDIR ${FAM}-${VER}
+
+    RUN  ./config --prefix=/buildroot/ssl ${CONFIG_FLAGS}
+
+    RUN  make
+    RUN  make install_sw
+
+    RUN  echo Built ${FAM}-${VER}
+EOF
+
+# Fetch the tar file. This could be done in an "ADD ..." in the Dockerfile,
+# but then we hit the proxy problem...
+wget -O $TMP $PFX$VER$SFX
+
+# Build the image:
+docker build -t ssh_compat_suite-$FAM:$VER -f ./TempDockerFile .
+
+# Cleaning
+rm -fr ./TempDockerFile $TMP
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create_all b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create_all
new file mode 100755
index 0000000000..0dcf8cb570
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/build_scripts/create_all
@@ -0,0 +1,89 @@
+#!/bin/bash
+
+UBUNTU_VERSION=16.04
+
+SSH_SSL_VERSIONS=(\
+        openssh 4.4p1  openssl  0.9.8c  \
+        openssh 4.5p1  openssl  0.9.8m  \
+        openssh 5.0p1  openssl  0.9.8za \
+        openssh 6.2p2  openssl  0.9.8c  \
+        openssh 6.3p1  openssl  0.9.8zh \
+                                        \
+        openssh 7.1p1  openssl  1.0.0a  \
+                                        \
+        openssh 7.1p1  openssl  1.0.1p  \
+                                        \
+        openssh 6.6p1  openssl  1.0.2n  \
+        openssh 7.1p1  openssl  1.0.2n  \
+        openssh 7.6p1  openssl  1.0.2n  \
+                                        \
+        openssh 7.6p1  libressl 2.6.4   \
+	)
+
+if [ "x$1" == "x-b" ]
+then
+    shift
+    SKIP_CREATE_BASE=true
+fi
+
+WHAT_TO_DO=$1
+
+function create_one_image ()
+{
+    SSH_FAM=$1
+    SSH_VER=$2
+    SSL_FAM=$3
+    SSL_VER=$4
+
+    [ "x$SKIP_CREATE_BASE" == "xtrue" ] || ./create-base-image || (echo "Create base failed." >&2; exit 1)
+    ./create-ssl-image $SSL_FAM $SSL_VER  \
+	|| (echo "Create $SSL_FAM $SSL_VER failed." >&2; exit 2)
+
+    ./create-ssh-image $SSH_FAM $SSH_VER $SSL_FAM $SSL_VER  \
+	|| (echo "Create $SSH_FAM $SSH_VER on $SSL_FAM $SSL_VER failed." >&2; exit 3)
+}
+
+
+case ${WHAT_TO_DO} in
+    list)
+	;;
+    listatoms)
+	PRE="["
+	POST="]"
+	C=\'
+	COMMA=,
+	;;
+    build_one)
+	if [ $# != 5 ]
+	then
+	    echo "$0 build_one openssh SSH_ver  openssl SSL_ver " && exit 
+	else
+	    create_one_image $2 $3 $4 $5
+	    exit
+	fi
+	;;
+    build_all)
+	;;
+    *)
+	echo "$0 [-b] list | listatoms | build_one openssh SSH_ver openssl SSL_ver | build_all" && exit
+	;;
+esac
+ 
+
+echo -n $PRE
+i=0
+while [ "x${SSH_SSL_VERSIONS[i]}" != "x" ]
+do
+   case ${WHAT_TO_DO} in
+       list*)
+	   [ $i -eq  0 ] || echo $COMMA
+	   echo -n $C${SSH_SSL_VERSIONS[$i]}${SSH_SSL_VERSIONS[$(( $i + 1 ))]}-${SSH_SSL_VERSIONS[$(( $i + 2 ))]}${SSH_SSL_VERSIONS[$(( $i + 3 ))]}$C
+	   ;;
+       build_all)
+	   create_one_image ${SSH_SSL_VERSIONS[$i]} ${SSH_SSL_VERSIONS[$(( $i + 1 ))]} ${SSH_SSL_VERSIONS[$(( $i + 2 ))]} ${SSH_SSL_VERSIONS[$(( $i + 3 ))]}
+	   ;;
+   esac
+
+   i=$(( $i + 4 ))
+done
+echo $POST
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_dsa_key b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_dsa_key
new file mode 100644
index 0000000000..8b2354a7ea
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_dsa_key
@@ -0,0 +1,12 @@
+-----BEGIN DSA PRIVATE KEY-----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+-----END DSA PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_dsa_key.pub b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_dsa_key.pub
new file mode 100644
index 0000000000..9116493472
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_dsa_key.pub
@@ -0,0 +1 @@
+ssh-dss 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 uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key256 b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key256
new file mode 100644
index 0000000000..5ed2b361cc
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key256
@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEILwQIf+Jul+oygeJn7cBSvn2LGqnW1ZfiHDQMDXZ96mooAoGCCqGSM49
+AwEHoUQDQgAEJUo0gCIhXEPJYvxec23IAjq7BjV1xw8deI8JV9vL5BMCZNhyj5Vt
+NbFPbKPuL/Sikn8p4YP/5y336ug7szvYrg==
+-----END EC PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key256.pub b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key256.pub
new file mode 100644
index 0000000000..240387d901
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key256.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBCVKNIAiIVxDyWL8XnNtyAI6uwY1dccPHXiPCVfby+QTAmTYco+VbTWxT2yj7i/0opJ/KeGD/+ct9+roO7M72K4= uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key384 b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key384
new file mode 100644
index 0000000000..9d31d75cd5
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key384
@@ -0,0 +1,6 @@
+-----BEGIN EC PRIVATE KEY-----
+MIGkAgEBBDBw+P1sic2i41wTGQgjyUlBtxQfnY77L8TFcDngoRiVrbCugnDrioNo
+JogqymWhSC+gBwYFK4EEACKhZANiAATwaqEp3vyLzfb08kqgIZLv/mAYJyGD+JMt
+f11OswGs3uFkbHZOErFCgeLuBvarSTAFkOlMR9GZGaDEfcrPBTtvKj+jEaAvh6yr
+JxS97rtwk2uadDMem2x4w9Ga4jw4S8E=
+-----END EC PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key384.pub b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key384.pub
new file mode 100644
index 0000000000..cca85bda72
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key384.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPBqoSne/IvN9vTySqAhku/+YBgnIYP4ky1/XU6zAaze4WRsdk4SsUKB4u4G9qtJMAWQ6UxH0ZkZoMR9ys8FO28qP6MRoC+HrKsnFL3uu3CTa5p0Mx6bbHjD0ZriPDhLwQ== uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key521 b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key521
new file mode 100644
index 0000000000..b698be1ec9
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key521
@@ -0,0 +1,7 @@
+-----BEGIN EC PRIVATE KEY-----
+MIHcAgEBBEIBtGVvyn7kGX7BfWAYHK2ZXmhWscTOV0J0mAfab0u0ZMw0id2a3O9s
+sBjJoCqoAXTJ7d/OUw85qqQNDE5GDQpDFq6gBwYFK4EEACOhgYkDgYYABAHPWfUD
+tQ/JmfwmmSdWWjGm94hFqwaivI4H43acDdd71+vods4rN2Yh3X7fSUvJkeOhXFOJ
+yO9F+61ssKgS0a0nxQEvdXks3QyfKTPjYQuBUvY+AV/A4AskPBz731xCDmbYuWuh
+RPekZ7d5bF0U0pGlExbX+naQJMSbJSdZrPM9993EmA==
+-----END EC PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key521.pub b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key521.pub
new file mode 100644
index 0000000000..d181d30d69
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_ecdsa_key521.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAHPWfUDtQ/JmfwmmSdWWjGm94hFqwaivI4H43acDdd71+vods4rN2Yh3X7fSUvJkeOhXFOJyO9F+61ssKgS0a0nxQEvdXks3QyfKTPjYQuBUvY+AV/A4AskPBz731xCDmbYuWuhRPekZ7d5bF0U0pGlExbX+naQJMSbJSdZrPM9993EmA== uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_rsa_key b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_rsa_key
new file mode 100644
index 0000000000..84096298ca
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_rsa_key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_rsa_key.pub b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_rsa_key.pub
new file mode 100644
index 0000000000..4ac6e7b124
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/host_keys/ssh_host_rsa_key.pub
@@ -0,0 +1 @@
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC4Lq7ELQ/y+hhAKvAnNzOj2JKLCyi8+/h613YEue7xwpZ2eNHfi1a+2C7DaQ76IPK3iEUYZ8MFB/ZJeX5kSwTY3VGVKnkDveZ7ZvLD8vgyt5fattRPDI1cXdMG8pvcZunHs+iIH1+txv1EIzG3KkG8ZAPpvHqHlRYq5KRjMBFpEu/eRsGzByp+sDc99bJuQihprZE7UJrzq7orS/5rivQ59HFOeCG5qRmQfoIPv65TeKuWI8hQW3bBMj+paacOswWHhF99OgcrRBkdd2SrhqZrmRFl1nSy9KivGqSXwRYY+FF6hSNivPRsI169KUPEcLEuLx6lHG6/4CFkdbRh0wIL uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_dsa b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_dsa
new file mode 100644
index 0000000000..01a88acea2
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_dsa
@@ -0,0 +1,12 @@
+-----BEGIN DSA PRIVATE KEY-----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+-----END DSA PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_dsa.pub b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_dsa.pub
new file mode 100644
index 0000000000..30661d5adf
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_dsa.pub
@@ -0,0 +1 @@
+ssh-dss AAAAB3NzaC1kc3MAAACBAL3tedxANpr09BgRYruWUHFlDay5VhPPV5p3DYe1j5jxkp1QEt30tRDaXKZQL3KrrqtvmkEFHXeT/1lxu7wjSdp+tlPjAngfRgYPo5vk7gdHgQeM7mqGCcwnXt7VefMjfUxbnEC4AdMssKU2+cbTlPWNpT61ECxVIIeKff6w56ejAAAAFQDEngDQb8O35ufi8Ps4jgBz43mM0QAAAIEAuRYIakqaUnrkXdj9FyjCcdC+ysMCWXMoX9pxJ+uIJVU/mpVncByHbxln0EUSdETZIqpWzIECJx5v/4hKW7wKooS++g0gwkC7mtQzBmH494c3gRLq1ZPAEYDC7ziR7o3gGBX7pDiqRzLLAexPmhTQR1VufbPMBnDxzu8GluwnUqwAAACABraHWqSFhaX4+GHmtKwXZFVRKh/4R6GR2LpkFzGm3Ixv+eo9K5CITjiBYiVMrWH23G1LiDuJyMGqHEnIef+sorNfNzdnwq+8qRCTS6mbpRXkUt9p1arJMIKmosS+GFhTN6Z85gCwC51S2EDC4GW7J4ViHKacr1FwJSw9RC9F+Ws= uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa
new file mode 100644
index 0000000000..60e8f6eb6e
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa
@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIC557KPgmq+pWOAh1L8DV8GWW0u7W5vz6mim3FFB1l8koAoGCCqGSM49
+AwEHoUQDQgAEC3J5fQ8+8xQso0lhBdoLdvD14oSsQiMuweXq+Dy2+4Mjdw2/bbw0
+CvbE2+KWNcgwxRLycNGcMCBdf/cOgNyGkA==
+-----END EC PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa256 b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa256
new file mode 100644
index 0000000000..60e8f6eb6e
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa256
@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIC557KPgmq+pWOAh1L8DV8GWW0u7W5vz6mim3FFB1l8koAoGCCqGSM49
+AwEHoUQDQgAEC3J5fQ8+8xQso0lhBdoLdvD14oSsQiMuweXq+Dy2+4Mjdw2/bbw0
+CvbE2+KWNcgwxRLycNGcMCBdf/cOgNyGkA==
+-----END EC PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa256.pub b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa256.pub
new file mode 100644
index 0000000000..b349d26da3
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa256.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBAtyeX0PPvMULKNJYQXaC3bw9eKErEIjLsHl6vg8tvuDI3cNv228NAr2xNviljXIMMUS8nDRnDAgXX/3DoDchpA= sshtester@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa384 b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa384
new file mode 100644
index 0000000000..ece6c8f284
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa384
@@ -0,0 +1,6 @@
+-----BEGIN EC PRIVATE KEY-----
+MIGkAgEBBDBdgJs/xThHiy/aY1ymtQ4B0URNnRCm8l2WZMFjua57+nvq4Duf+igN
+pN/5p/+azLKgBwYFK4EEACKhZANiAATUw6pT/UW2HvTW6lL2BGY7NfUGEX285XVi
+9AcTXH1K+TOekbGmcpSirlGzSb15Wycajpmaae5vAzH1nnvcVd3FYODVdDXTHgV/
+FeXQ+vaw7CZnEAKZsr8mjXRX3fEyO1E=
+-----END EC PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa384.pub b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa384.pub
new file mode 100644
index 0000000000..fd81e220f7
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa384.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBNTDqlP9RbYe9NbqUvYEZjs19QYRfbzldWL0BxNcfUr5M56RsaZylKKuUbNJvXlbJxqOmZpp7m8DMfWee9xV3cVg4NV0NdMeBX8V5dD69rDsJmcQApmyvyaNdFfd8TI7UQ== uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa521 b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa521
new file mode 100644
index 0000000000..21c000ea03
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa521
@@ -0,0 +1,7 @@
+-----BEGIN EC PRIVATE KEY-----
+MIHbAgEBBEEhm0w3xcGILU8eP61mThVBwCJfyzrFktGf7cCa1ciL4YLsukd20Q3Z
+yp0YcEDLcEm36CZGabgkEvblJ1Rx2lPTu6AHBgUrgQQAI6GBiQOBhgAEAYep8cX2
+7wUPw5pNYwFkWQXrJ2GSkmO8iHwkWJ6srRay/sF3WoPF/dyDVymFgirtsSTJ+D0u
+ex4qphOOJxkd1Yf+ANHvDFN9LoBvbgtNLTRJlpuNLCdWQlt+mEnPMDGMV/HWHHiz
+7/mWE+XUVIcQjhm5uv0ObI/wroZEurXMGEhTis3L
+-----END EC PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa521.pub b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa521.pub
new file mode 100644
index 0000000000..d9830da5de
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_ecdsa521.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAGHqfHF9u8FD8OaTWMBZFkF6ydhkpJjvIh8JFierK0Wsv7Bd1qDxf3cg1cphYIq7bEkyfg9LnseKqYTjicZHdWH/gDR7wxTfS6Ab24LTS00SZabjSwnVkJbfphJzzAxjFfx1hx4s+/5lhPl1FSHEI4Zubr9DmyP8K6GRLq1zBhIU4rNyw== uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_rsa b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_rsa
new file mode 100644
index 0000000000..2e50ac2304
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_rsa
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_rsa.pub b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_rsa.pub
new file mode 100644
index 0000000000..26e560d4f8
--- /dev/null
+++ b/lib/ssh/test/ssh_compat_SUITE_data/users_keys/id_rsa.pub
@@ -0,0 +1 @@
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDv4LeAuh+UrJurgj5yVuDZJZ/pxfIemcs0Odl4y8hs7PZf8J5dSbXsMV57FNpUGz1mr1bAMU4WQtCFu5eCm8HSyFJjSev4SbsidEzwCJEvE97S3EyYUWEv6/Tzd1jCBok6jU+2E0z+0ZFkm77SxAOquY3sK6wUd1mDY1PNPNvBao+K4/+Z/ejtbgJaoNMHNthOClaUfu9Fl/0VjBPiiflhbMsDxO87ZPAEZN9MwrmezAf76I6/iMp5ygTDIEUxRIqpn1RgcbD+SyEduW0zrlh7/GNcRfQbEN3G7xnJUpd3hpw1skk/S1zE3gbMomJHrM1jALMOGOoMRszmoIaFKGGB uabhnil@elxadlj3q32
diff --git a/lib/ssh/test/ssh_connection_SUITE.erl b/lib/ssh/test/ssh_connection_SUITE.erl
index 9bbd9da817..257f2f70d7 100644
--- a/lib/ssh/test/ssh_connection_SUITE.erl
+++ b/lib/ssh/test/ssh_connection_SUITE.erl
@@ -45,9 +45,18 @@ all() ->
      {group, openssh},
      small_interrupted_send,
      interrupted_send,
+     exec_erlang_term,
+     exec_erlang_term_non_default_shell,
      start_shell,
      start_shell_exec,
      start_shell_exec_fun,
+     start_shell_exec_fun2,
+     start_shell_exec_fun3,
+     start_shell_exec_direct_fun,
+     start_shell_exec_direct_fun2,
+     start_shell_exec_direct_fun3,
+     start_shell_exec_direct_fun1_error,
+     start_shell_exec_direct_fun1_error_type,
      start_shell_sock_exec_fun,
      start_shell_sock_daemon_exec,
      connect_sock_not_tcp,
@@ -85,13 +94,14 @@ init_per_suite(Config) ->
     ?CHECK_CRYPTO(Config).
 
 end_per_suite(Config) ->
+    catch ssh:stop(),
     Config.
 
 %%--------------------------------------------------------------------
 init_per_group(openssh, Config) ->
     case ssh_test_lib:gen_tcp_connect("localhost", 22, []) of
 	{error,econnrefused} ->
-	    {skip,"No openssh deamon"};
+	    {skip,"No openssh deamon (econnrefused)"};
 	{ok, Socket} ->
 	    gen_tcp:close(Socket),
 	    ssh_test_lib:openssh_sanity_check(Config)
@@ -519,7 +529,7 @@ start_shell_exec(Config) when is_list(Config) ->
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
 					     {user_dir, UserDir},
 					     {password, "morot"},
-					     {exec, {?MODULE,ssh_exec,[]}} ]),
+					     {exec, {?MODULE,ssh_exec_echo,[]}} ]),
 
     ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
 						      {user, "foo"},
@@ -532,7 +542,7 @@ start_shell_exec(Config) when is_list(Config) ->
     success = ssh_connection:exec(ConnectionRef, ChannelId0,
 				  "testing", infinity),
     receive
-	{ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} ->
+	{ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"echo testing\r\n">>}} ->
 	    ok
     after 5000 ->
 	    ct:fail("Exec Timeout")
@@ -542,10 +552,42 @@ start_shell_exec(Config) when is_list(Config) ->
     ssh:stop_daemon(Pid).
 
 %%--------------------------------------------------------------------
-start_shell_exec_fun() ->
-    [{doc, "start shell to exec command"}].
+exec_erlang_term(Config) when is_list(Config) ->
+    PrivDir = proplists:get_value(priv_dir, Config),
+    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
+    file:make_dir(UserDir),
+    SysDir = proplists:get_value(data_dir, Config),
+    {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
+					     {user_dir, UserDir},
+					     {password, "morot"}
+                                            ]),
+
+    ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
+						      {user, "foo"},
+						      {password, "morot"},
+						      {user_interaction, true},
+						      {user_dir, UserDir}]),
+
+    {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
+
+    success = ssh_connection:exec(ConnectionRef, ChannelId0,
+				  "1+2.", infinity),
+    TestResult =
+        receive
+            {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"3",_/binary>>}} = R ->
+                ct:log("Got expected ~p",[R]);
+            Other ->
+                ct:log("Got unexpected ~p",[Other])
+        after 5000 ->
+                {fail,"Exec Timeout"}
+        end,
+
+    ssh:close(ConnectionRef),
+    ssh:stop_daemon(Pid),
+    TestResult.
 
-start_shell_exec_fun(Config) when is_list(Config) ->
+%%--------------------------------------------------------------------
+exec_erlang_term_non_default_shell(Config) when is_list(Config) ->
     PrivDir = proplists:get_value(priv_dir, Config),
     UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
     file:make_dir(UserDir),
@@ -553,24 +595,109 @@ start_shell_exec_fun(Config) when is_list(Config) ->
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
 					     {user_dir, UserDir},
 					     {password, "morot"},
-					     {exec, fun ssh_exec/1}]),
+                                             {shell, fun(U, H) -> start_our_shell(U, H) end}
+                                            ]),
 
     ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
 						      {user, "foo"},
 						      {password, "morot"},
 						      {user_interaction, true},
-						      {user_dir, UserDir}]),
+						      {user_dir, UserDir}
+                                                     ]),
 
     {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
 
     success = ssh_connection:exec(ConnectionRef, ChannelId0,
-				  "testing", infinity),
+				  "1+2.", infinity),
+    TestResult =
+        receive
+            {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"3",_/binary>>}} = R ->
+                ct:log("Got unexpected ~p",[R]),
+                {fail,"Could exec erlang term although non-erlang shell"};
+            Other ->
+                ct:log("Got expected ~p",[Other])
+        after 5000 ->
+                {fail, "Exec Timeout"}
+        end,
+
+    ssh:close(ConnectionRef),
+    ssh:stop_daemon(Pid),
+    TestResult.
+
+%%--------------------------------------------------------------------
+start_shell_exec_fun(Config) ->
+    do_start_shell_exec_fun(fun ssh_exec_echo/1,
+                            "testing", <<"echo testing\r\n">>, 0,
+                            Config).
+
+start_shell_exec_fun2(Config) ->
+    do_start_shell_exec_fun(fun ssh_exec_echo/2,
+                            "testing", <<"echo foo testing\r\n">>, 0,
+                            Config).
+
+start_shell_exec_fun3(Config) ->
+    do_start_shell_exec_fun(fun ssh_exec_echo/3,
+                            "testing", <<"echo foo testing\r\n">>, 0,
+                            Config).
+
+start_shell_exec_direct_fun(Config) ->
+    do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo/1},
+                            "testing", <<"echo testing\n">>, 0,
+                            Config).
+
+start_shell_exec_direct_fun2(Config) ->
+    do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo/2},
+                            "testing", <<"echo foo testing">>, 0,
+                            Config).
+
+start_shell_exec_direct_fun3(Config) ->
+    do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo/3},
+                            "testing", <<"echo foo testing">>, 0,
+                            Config).
+
+start_shell_exec_direct_fun1_error(Config) ->
+    do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo_error_return/1},
+                            "testing", <<"Error in \"testing\": {bad}\n">>, 1,
+                            Config).
+
+start_shell_exec_direct_fun1_error_type(Config) ->
+    do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo_error_return_type/1},
+                            "testing", <<"Error in \"testing\": Bad exec-plugin return: very_bad\n">>, 1,
+                            Config).
+
+
+
+do_start_shell_exec_fun(Fun, Command, Expect, ExpectType, Config) ->
+    PrivDir = proplists:get_value(priv_dir, Config),
+    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
+    file:make_dir(UserDir),
+    SysDir = proplists:get_value(data_dir, Config),
+    {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
+					     {user_dir, UserDir},
+					     {password, "morot"},
+					     {exec, Fun}]),
+
+    ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
+						      {user, "foo"},
+						      {password, "morot"},
+						      {user_interaction, true},
+						      {user_dir, UserDir}]),
+
+    {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
+
+    success = ssh_connection:exec(ConnectionRef, ChannelId0, Command, infinity),
 
     receive
-	{ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} ->
+	{ssh_cm, ConnectionRef, {data, _ChannelId, ExpectType, Expect}} ->
 	    ok
     after 5000 ->
-	    ct:fail("Exec Timeout")
+            receive
+                Other ->
+                    ct:pal("Received other:~n~p",[Other]),
+                    ct:fail("Unexpected response")
+            after 0 ->
+                    ct:fail("Exec Timeout")
+            end
     end,
 
     ssh:close(ConnectionRef),
@@ -588,7 +715,7 @@ start_shell_sock_exec_fun(Config) when is_list(Config) ->
     {Pid, HostD, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
                                               {user_dir, UserDir},
                                               {password, "morot"},
-                                              {exec, fun ssh_exec/1}]),
+                                              {exec, fun ssh_exec_echo/1}]),
     Host = ssh_test_lib:ntoa(ssh_test_lib:mangle_connect_address(HostD)),
 
     {ok, Sock} = ssh_test_lib:gen_tcp_connect(Host, Port, [{active,false}]),
@@ -604,7 +731,7 @@ start_shell_sock_exec_fun(Config) when is_list(Config) ->
 				  "testing", infinity),
 
     receive
-	{ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} ->
+	{ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"echo testing\r\n">>}} ->
 	    ok
     after 5000 ->
 	    ct:fail("Exec Timeout")
@@ -628,7 +755,7 @@ start_shell_sock_daemon_exec(Config) ->
 		       {ok, _Pid} = ssh:daemon(Ss, [{system_dir, SysDir},
 						    {user_dir, UserDir},
 						    {password, "morot"},
-						    {exec, fun ssh_exec/1}])
+						    {exec, fun ssh_exec_echo/1}])
 	       end),
     {ok,Sc} = gen_tcp:accept(Sl),
     {ok,ConnectionRef} = ssh:connect(Sc, [{silently_accept_hosts, true},
@@ -643,7 +770,7 @@ start_shell_sock_daemon_exec(Config) ->
 				  "testing", infinity),
 
     receive
-	{ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} ->
+	{ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"echo testing\r\n">>}} ->
 	    ok
     after 5000 ->
 	    ct:fail("Exec Timeout")
@@ -754,7 +881,7 @@ stop_listener(Config) when is_list(Config) ->
     {Pid0, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
 					      {user_dir, UserDir},
 					      {password, "morot"},
-					      {exec, fun ssh_exec/1}]),
+					      {exec, fun ssh_exec_echo/1}]),
 
     ConnectionRef0 = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
 						       {user, "foo"},
@@ -774,7 +901,7 @@ stop_listener(Config) when is_list(Config) ->
     success = ssh_connection:exec(ConnectionRef0, ChannelId0,
 				  "testing", infinity),
     receive
-	{ssh_cm, ConnectionRef0, {data, ChannelId0, 0, <<"testing\r\n">>}} ->
+	{ssh_cm, ConnectionRef0, {data, ChannelId0, 0, <<"echo testing\r\n">>}} ->
 	    ok
     after 5000 ->
 	    ct:fail("Exec Timeout")
@@ -783,7 +910,7 @@ stop_listener(Config) when is_list(Config) ->
     case ssh_test_lib:daemon(Port, [{system_dir, SysDir},
                                     {user_dir, UserDir},
                                     {password, "potatis"},
-                                    {exec, fun ssh_exec/1}]) of
+                                    {exec, fun ssh_exec_echo/1}]) of
 	{Pid1, Host, Port} ->
 	    ConnectionRef1 = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
 							       {user, "foo"},
@@ -800,6 +927,8 @@ stop_listener(Config) when is_list(Config) ->
 	    ssh:stop_daemon(Pid0),
 	    ssh:stop_daemon(Pid1);
 	Error ->
+	    ssh:close(ConnectionRef0),
+	    ssh:stop_daemon(Pid0),
 	    ct:fail({unexpected, Error})
     end.
 
@@ -819,11 +948,22 @@ start_subsystem_on_closed_channel(Config) ->
 						      {user_interaction, false},
 						      {user_dir, UserDir}]),
 
-    {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
 
-    ok = ssh_connection:close(ConnectionRef, ChannelId),
+    {ok, ChannelId1} = ssh_connection:session_channel(ConnectionRef, infinity),
+    ok = ssh_connection:close(ConnectionRef, ChannelId1),
+    {error, closed} = ssh_connection:ptty_alloc(ConnectionRef, ChannelId1, []),
+    {error, closed} = ssh_connection:subsystem(ConnectionRef, ChannelId1, "echo_n", 5000),
+    {error, closed} = ssh_connection:exec(ConnectionRef, ChannelId1, "testing1.\n", 5000),
+    {error, closed} = ssh_connection:send(ConnectionRef, ChannelId1, "exit().\n", 5000),
 
-    {error, closed} = ssh_connection:subsystem(ConnectionRef, ChannelId, "echo_n", infinity),
+    %% Test that there could be a gap between close and an operation (Bugfix OTP-14939):
+    {ok, ChannelId2} = ssh_connection:session_channel(ConnectionRef, infinity),
+    ok = ssh_connection:close(ConnectionRef, ChannelId2),
+    timer:sleep(2000),
+    {error, closed} = ssh_connection:ptty_alloc(ConnectionRef, ChannelId2, []),
+    {error, closed} = ssh_connection:subsystem(ConnectionRef, ChannelId2, "echo_n", 5000),
+    {error, closed} = ssh_connection:exec(ConnectionRef, ChannelId2, "testing1.\n", 5000),
+    {error, closed} = ssh_connection:send(ConnectionRef, ChannelId2, "exit().\n", 5000),
 
     ssh:close(ConnectionRef),
     ssh:stop_daemon(Pid).
@@ -981,7 +1121,22 @@ start_our_shell(_User, _Peer) ->
 		  %% Don't actually loop, just exit
           end).
 
-ssh_exec(Cmd) ->
+
+ssh_exec_echo(Cmd) ->
+    spawn(fun() ->
+                  io:format("echo "++Cmd ++ "\n")
+          end).
+
+ssh_exec_echo(Cmd, User) ->
     spawn(fun() ->
-		  io:format(Cmd ++ "\n")
+                  io:format(io_lib:format("echo ~s ~s\n",[User,Cmd]))
           end).
+ssh_exec_echo(Cmd, User, _PeerAddr) ->
+    ssh_exec_echo(Cmd,User).
+
+ssh_exec_direct_echo(Cmd) -> {ok, io_lib:format("echo ~s~n",[Cmd])}.
+ssh_exec_direct_echo(Cmd, User) -> {ok, io_lib:format("echo ~s ~s",[User,Cmd])}.
+ssh_exec_direct_echo(Cmd, User, _PeerAddr) -> ssh_exec_direct_echo(Cmd,User).
+
+ssh_exec_direct_echo_error_return(_Cmd) -> {error, {bad}}.
+ssh_exec_direct_echo_error_return_type(_Cmd) -> very_bad.
diff --git a/lib/ssh/test/ssh_engine_SUITE.erl b/lib/ssh/test/ssh_engine_SUITE.erl
new file mode 100644
index 0000000000..c131a70973
--- /dev/null
+++ b/lib/ssh/test/ssh_engine_SUITE.erl
@@ -0,0 +1,146 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+
+-module(ssh_engine_SUITE).
+
+-include_lib("common_test/include/ct.hrl").
+-include("ssh_test_lib.hrl").
+
+%% Note: This directive should only be used in test suites.
+-compile(export_all).
+
+%%--------------------------------------------------------------------
+%% Common Test interface functions -----------------------------------
+%%--------------------------------------------------------------------
+
+suite() ->
+    [{ct_hooks,[ts_install_cth]},
+     {timetrap,{seconds,40}}].
+
+all() -> 
+    [{group, dsa_key},
+     {group, rsa_key}
+    ].
+
+groups() ->
+    [{dsa_key, [], basic_tests()},
+     {rsa_key, [], basic_tests()}
+    ].
+
+basic_tests() ->
+    [simple_connect
+    ].
+
+
+%%--------------------------------------------------------------------
+init_per_suite(Config) ->
+    ssh:start(),
+    ?CHECK_CRYPTO(
+       case crypto:info_lib() of
+           [{_,_, <<"OpenSSL 1.0.1s-freebsd  1 Mar 2016">>}] ->
+               {skip, "Strange Engine stuff"};
+
+           _ ->
+               case load_engine() of
+                   {ok,E} ->
+                       [{engine,E}|Config];
+                   {error, notsup} ->
+                       {skip, "Engine not supported on this OpenSSL version"};
+                   {error, bad_engine_id} ->
+                       {skip, "Dynamic Engine not supported"};
+                   Other ->
+                       ct:log("Engine load failed: ~p",[Other]),
+                       {fail, "Engine load failed"}
+               end
+       end
+      ).
+
+end_per_suite(Config) ->
+    catch crypto:engine_unload( proplists:get_value(engine,Config) ),
+    ssh:stop().
+
+%%--------------------------------------------------------------------
+init_per_group(dsa_key, Config) ->
+    case lists:member('ssh-dss',
+		      ssh_transport:default_algorithms(public_key)) of
+	true ->
+            start_daemon(Config, 'ssh-dss', "dsa_private_key.pem");
+	false ->
+	    {skip, unsupported_pub_key}
+    end;
+init_per_group(rsa_key, Config) ->
+    case lists:member('ssh-rsa',
+		      ssh_transport:default_algorithms(public_key)) of
+	true ->
+            start_daemon(Config, 'ssh-rsa', "rsa_private_key.pem");
+	false ->
+	    {skip, unsupported_pub_key}
+    end.
+
+start_daemon(Config, KeyType, KeyId) ->
+    SystemDir = proplists:get_value(data_dir, Config),
+    FullKeyId = filename:join(SystemDir, KeyId),
+    KeyCBOpts = [{engine, proplists:get_value(engine,Config)},
+                 {KeyType, FullKeyId}
+                ],
+    Opts = [{key_cb, {ssh_key_cb_engine_keys, KeyCBOpts}}],
+    {Pid, Host, Port} = ssh_test_lib:std_daemon(Config, Opts),
+    [{host_port,{Host,Port}}, {daemon_pid,Pid}| Config].
+
+
+end_per_group(_, Config) ->
+    catch ssh:stop_daemon(proplists:get_value(daemon_pid,Config)),
+    Config.
+
+%%--------------------------------------------------------------------
+%% Test Cases --------------------------------------------------------
+%%--------------------------------------------------------------------
+
+%% A simple exec call
+simple_connect(Config) ->
+    {Host,Port} = proplists:get_value(host_port, Config),
+    CRef = ssh_test_lib:std_connect(Config, Host, Port, []),
+    ssh:close(CRef).
+
+%%--------------------------------------------------------------------
+%%--------------------------------------------------------------------
+load_engine() ->
+    case crypto:get_test_engine() of
+        {ok, Engine} ->
+            try crypto:engine_load(<<"dynamic">>,
+                                   [{<<"SO_PATH">>, Engine},
+                                    <<"LOAD">>],
+                                   [])
+            catch
+                error:notsup ->
+                    {error, notsup}
+            end;
+
+        {error, Error} ->
+            {error, Error}
+    end.
+
+start_std_daemon(Opts, Config) ->
+    ct:log("starting std_daemon",[]),
+    {Pid, Host, Port} = ssh_test_lib:std_daemon(Config, Opts),
+    ct:log("started ~p:~p  ~p",[Host,Port,Opts]),
+    [{srvr_pid,Pid},{srvr_addr,{Host,Port}} | Config].
diff --git a/lib/ssh/test/ssh_engine_SUITE_data/dsa_private_key.pem b/lib/ssh/test/ssh_engine_SUITE_data/dsa_private_key.pem
new file mode 100644
index 0000000000..778ffac675
--- /dev/null
+++ b/lib/ssh/test/ssh_engine_SUITE_data/dsa_private_key.pem
@@ -0,0 +1,9 @@
+-----BEGIN PRIVATE KEY-----
+MIIBSwIBADCCASwGByqGSM44BAEwggEfAoGBAMyitTMR7vPbpqyAXJpqnB0AhFwQ
+F87IE+JKFl5bD/MSkhhRV5sM73HUU1ooXY0FjhZ+cdLUCATuZR5ta4ydANqWIcAB
+gX3IwF1B4zf5SXEKTWkUYneL9dOKtiZLtoG28swrk8xMxwX+0fLHkltCEj6FiTW9
+PFrv8GmIfV6DjcI9AhUAqXWbb3RtoN9Ld28fVMhGZrj3LJUCgYEAwnxGHGBMpJaF
+2w7zAw3jHjL8PMYlV6vnufGHQlwF0ZUXJxRsvagMb/X1qACTu2VPYEVoLQGM3cfH
+EhHoQmvSXGAyTfR7Bmn3gf1n/s/DcFbdZduUCZ/rAyIrfd0eSbc1I+kZk85UCsKK
+w/IYdlqcuYa4Cgm2TapT5uEMqH4jhzEEFgIULh8swEUWmU8aJNWsrWl4eCiuUUg=
+-----END PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_engine_SUITE_data/ecdsa_private_key.pem b/lib/ssh/test/ssh_engine_SUITE_data/ecdsa_private_key.pem
new file mode 100644
index 0000000000..a45522064f
--- /dev/null
+++ b/lib/ssh/test/ssh_engine_SUITE_data/ecdsa_private_key.pem
@@ -0,0 +1,8 @@
+-----BEGIN PRIVATE KEY-----
+MIHuAgEAMBAGByqGSM49AgEGBSuBBAAjBIHWMIHTAgEBBEIBparGjr0KcdNrVM2J
+G0mW5ltP1QyvxDqBMyWLWo3fruRZv6Qoohl5skd1u4O+KJoM/UrrSTOXI/MDR7NN
+i1yl7O+hgYkDgYYABAG8K2XVsK0ahG9+HIIPwCO0pJY8ulwSTXwIjkCGyB2lpglh
+8qJmRzuyGcfRTslv8wfv0sPlT9H9PKDvgrTUL7rvQQDdOODNgVPXSecUoXoPn+X+
+eqxs77bjx+A5x0t/i3m5PfkaNPh5MZ1H/bWuOOdj2ZXZw0R4rlVc0zVrgnPU8L8S
+BQ==
+-----END PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_engine_SUITE_data/rsa_private_key.pem b/lib/ssh/test/ssh_engine_SUITE_data/rsa_private_key.pem
new file mode 100644
index 0000000000..ea0e3d3958
--- /dev/null
+++ b/lib/ssh/test/ssh_engine_SUITE_data/rsa_private_key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_engine_SUITE_data/rsa_private_key_pwd.pem b/lib/ssh/test/ssh_engine_SUITE_data/rsa_private_key_pwd.pem
new file mode 100644
index 0000000000..501662fc35
--- /dev/null
+++ b/lib/ssh/test/ssh_engine_SUITE_data/rsa_private_key_pwd.pem
@@ -0,0 +1,30 @@
+-----BEGIN ENCRYPTED PRIVATE KEY-----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+-----END ENCRYPTED PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_key_cb_engine_keys.erl b/lib/ssh/test/ssh_key_cb_engine_keys.erl
new file mode 100644
index 0000000000..fc9cbfd49b
--- /dev/null
+++ b/lib/ssh/test/ssh_key_cb_engine_keys.erl
@@ -0,0 +1,62 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2015-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+%%----------------------------------------------------------------------
+
+%% Note: This module is used by ssh_basic_SUITE
+
+-module(ssh_key_cb_engine_keys).
+-behaviour(ssh_server_key_api).
+-compile(export_all).
+
+host_key(SshAlg, Options) ->
+    KBopts = proplists:get_value(key_cb_private, Options, []),
+    Engine = proplists:get_value(engine, KBopts),
+    case proplists:get_value(SshAlg, KBopts) of
+        undefined ->
+            {error, {unknown_alg,SshAlg}};
+        KeyId ->
+            case crypto_alg(SshAlg) of
+                undefined ->
+                    {error, {unsupported_alg,SshAlg}};
+                CryptoAlg ->
+                    PrivKey = #{engine => Engine,
+                                key_id => KeyId,
+                                algorithm => CryptoAlg},
+                    %% Is there a key with this reference ?
+                    case crypto:privkey_to_pubkey(CryptoAlg, PrivKey) of
+                        [_|_] -> 
+                            {ok, PrivKey};
+                        _ ->
+                            {error, {no_hostkey,SshAlg}}
+                    end
+            end
+    end.
+
+is_auth_key(_PublicUserKey, _User, _Options) ->
+    false.
+
+
+
+crypto_alg('ssh-rsa') -> rsa;
+crypto_alg('ssh-dss') -> dss;
+crypto_alg(_) -> undefined.
+    
diff --git a/lib/ssh/test/ssh_options_SUITE.erl b/lib/ssh/test/ssh_options_SUITE.erl
index 8b454ffe5d..12a85c40aa 100644
--- a/lib/ssh/test/ssh_options_SUITE.erl
+++ b/lib/ssh/test/ssh_options_SUITE.erl
@@ -36,7 +36,9 @@
 	 id_string_no_opt_client/1, 
 	 id_string_no_opt_server/1, 
 	 id_string_own_string_client/1, 
+	 id_string_own_string_client_trail_space/1, 
 	 id_string_own_string_server/1, 
+	 id_string_own_string_server_trail_space/1, 
 	 id_string_random_client/1, 
 	 id_string_random_server/1, 
 	 max_sessions_sftp_start_channel_parallel/1, 
@@ -68,7 +70,8 @@
 	 hostkey_fingerprint_check_sha256/1,
 	 hostkey_fingerprint_check_sha384/1,
 	 hostkey_fingerprint_check_sha512/1,
-	 hostkey_fingerprint_check_list/1
+	 hostkey_fingerprint_check_list/1,
+         save_accepted_host_option/1
 	]).
 
 %%% Common test callbacks
@@ -116,10 +119,13 @@ all() ->
      hostkey_fingerprint_check_list,
      id_string_no_opt_client,
      id_string_own_string_client,
+     id_string_own_string_client_trail_space,
      id_string_random_client,
      id_string_no_opt_server,
      id_string_own_string_server,
+     id_string_own_string_server_trail_space,
      id_string_random_server,
+     save_accepted_host_option,
      {group, hardening_tests}
     ].
 
@@ -202,32 +208,23 @@ end_per_group(_, Config) ->
 %%--------------------------------------------------------------------
 init_per_testcase(_TestCase, Config) ->
     ssh:start(),
-    Config.
-
-end_per_testcase(TestCase, Config) when TestCase == server_password_option;
-					TestCase == server_userpassword_option;
-					TestCase == server_pwdfun_option;
-					TestCase == server_pwdfun_4_option ->
+    %% Create a clean user_dir
     UserDir = filename:join(proplists:get_value(priv_dir, Config), nopubkey),
     ssh_test_lib:del_dirs(UserDir),
-    end_per_testcase(Config);
-end_per_testcase(_TestCase, Config) ->
-    end_per_testcase(Config).
+    file:make_dir(UserDir),
+    [{user_dir,UserDir}|Config].
 
-end_per_testcase(_Config) ->    
+end_per_testcase(_TestCase, Config) ->
     ssh:stop(),
     ok.
 
 %%--------------------------------------------------------------------
 %% Test Cases --------------------------------------------------------
 %%--------------------------------------------------------------------
-%%--------------------------------------------------------------------
 
 %%% validate to server that uses the 'password' option
 server_password_option(Config) when is_list(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
 					     {user_dir, UserDir},
@@ -258,12 +255,10 @@ server_password_option(Config) when is_list(Config) ->
 
 %%% validate to server that uses the 'password' option
 server_userpassword_option(Config) when is_list(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),	  
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
-					     {user_dir, PrivDir},
+					     {user_dir, UserDir},
 					     {user_passwords, [{"vego", "morot"}]}]),
 
     ConnectionRef =
@@ -293,15 +288,13 @@ server_userpassword_option(Config) when is_list(Config) ->
 %%--------------------------------------------------------------------
 %%% validate to server that uses the 'pwdfun' option
 server_pwdfun_option(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),	  
     CHKPWD = fun("foo",Pwd) -> Pwd=="bar";
 		(_,_) -> false
 	     end,
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
-					     {user_dir, PrivDir},
+					     {user_dir, UserDir},
 					     {pwdfun,CHKPWD}]),
     ConnectionRef =
 	ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
@@ -331,9 +324,7 @@ server_pwdfun_option(Config) ->
 %%--------------------------------------------------------------------
 %%% validate to server that uses the 'pwdfun/4' option
 server_pwdfun_4_option(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),	  
     PWDFUN = fun("foo",Pwd,{_,_},undefined) -> Pwd=="bar";
 		("fie",Pwd,{_,_},undefined) -> {Pwd=="bar",new_state};
@@ -341,7 +332,7 @@ server_pwdfun_4_option(Config) ->
 		(_,_,_,_) -> false
 	     end,
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
-					     {user_dir, PrivDir},
+					     {user_dir, UserDir},
 					     {pwdfun,PWDFUN}]),
     ConnectionRef1 =
 	ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
@@ -391,9 +382,7 @@ server_pwdfun_4_option(Config) ->
     
 %%--------------------------------------------------------------------
 server_pwdfun_4_option_repeat(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),	  
     %% Test that the state works
     Parent = self(),
@@ -402,7 +391,7 @@ server_pwdfun_4_option_repeat(Config) ->
 		(_,P,_,S) -> Parent!{P,S},          {false,S+1}
 	     end,
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
-					     {user_dir, PrivDir},
+					     {user_dir, UserDir},
 					     {auth_methods,"keyboard-interactive"},
 					     {pwdfun,PWDFUN}]),
 
@@ -486,9 +475,7 @@ user_dir_option(Config) ->
 %%--------------------------------------------------------------------
 %%% validate client that uses the 'ssh_msg_debug_fun' option
 ssh_msg_debug_fun_option_client(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
@@ -526,9 +513,7 @@ ssh_msg_debug_fun_option_client(Config) ->
 
 %%--------------------------------------------------------------------
 connectfun_disconnectfun_server(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     Parent = self(),
@@ -572,9 +557,7 @@ connectfun_disconnectfun_server(Config) ->
 
 %%--------------------------------------------------------------------
 connectfun_disconnectfun_client(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     Parent = self(),
@@ -603,9 +586,7 @@ connectfun_disconnectfun_client(Config) ->
 %%--------------------------------------------------------------------
 %%% validate client that uses the 'ssh_msg_debug_fun' option
 ssh_msg_debug_fun_option_server(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     Parent = self(),
@@ -647,9 +628,7 @@ ssh_msg_debug_fun_option_server(Config) ->
 
 %%--------------------------------------------------------------------
 disconnectfun_option_server(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     Parent = self(),
@@ -682,9 +661,7 @@ disconnectfun_option_server(Config) ->
 
 %%--------------------------------------------------------------------
 disconnectfun_option_client(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     Parent = self(),
@@ -716,9 +693,7 @@ disconnectfun_option_client(Config) ->
 
 %%--------------------------------------------------------------------
 unexpectedfun_option_server(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     Parent = self(),
@@ -759,9 +734,7 @@ unexpectedfun_option_server(Config) ->
 
 %%--------------------------------------------------------------------
 unexpectedfun_option_client(Config) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
     Parent = self(),
@@ -836,14 +809,9 @@ supported_hash(HashAlg) ->
 
 
 really_do_hostkey_fingerprint_check(Config, HashAlg) ->
-    PrivDir = proplists:get_value(priv_dir, Config),
-    UserDirServer = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDirServer),
+    UserDir = proplists:get_value(user_dir, Config),
     SysDir = proplists:get_value(data_dir, Config),
 
-    UserDirClient = 
-	ssh_test_lib:create_random_dir(Config), % Ensure no 'known_hosts' disturbs
-
     %% All host key fingerprints.  Trust that public_key has checked the ssh_hostkey_fingerprint
     %% function since that function is used by the ssh client...
     FPs0 = [case HashAlg of
@@ -869,7 +837,7 @@ really_do_hostkey_fingerprint_check(Config, HashAlg) ->
 
     %% Start daemon with the public keys that we got fingerprints from
     {Pid, Host0, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
-					     {user_dir, UserDirServer},
+					     {user_dir, UserDir},
 					     {password, "morot"}]),
     Host = ssh_test_lib:ntoa(Host0),
     FP_check_fun = fun(PeerName, FP) ->
@@ -892,7 +860,8 @@ really_do_hostkey_fingerprint_check(Config, HashAlg) ->
 				       end},
 				      {user, "foo"},
 				      {password, "morot"},
-				      {user_dir, UserDirClient},
+				      {user_dir, UserDir},
+                                      {save_accepted_host, false}, % Ensure no 'known_hosts' disturbs
 				      {user_interaction, false}]),
     ssh:stop_daemon(Pid).
 
@@ -983,9 +952,7 @@ ms_passed(T0) ->
 %%--------------------------------------------------------------------
 ssh_daemon_minimal_remote_max_packet_size_option(Config) ->
     SystemDir = proplists:get_value(data_dir, Config),
-    PrivDir = proplists:get_value(priv_dir, Config), 
-    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
-    file:make_dir(UserDir),
+    UserDir = proplists:get_value(user_dir, Config), 
     
     {Server, Host, Port} = ssh_test_lib:daemon([{system_dir, SystemDir},
 						{user_dir, UserDir},
@@ -1035,6 +1002,19 @@ id_string_own_string_client(Config) ->
     end.
 
 %%--------------------------------------------------------------------
+id_string_own_string_client_trail_space(Config) ->
+    {Server, _Host, Port} = fake_daemon(Config),
+    {error,_} = ssh:connect("localhost", Port, [{id_string,"Pelle "}], 1000),
+    receive
+	{id,Server,"SSH-2.0-Pelle \r\n"} ->
+	    ok;
+	{id,Server,Other} ->
+	    ct:fail("Unexpected id: ~s.",[Other])
+    after 5000 ->
+	    {fail,timeout}
+    end.
+
+%%--------------------------------------------------------------------
 id_string_random_client(Config) ->
     {Server, _Host, Port} = fake_daemon(Config),
     {error,_} = ssh:connect("localhost", Port, [{id_string,random}], 1000),
@@ -1063,6 +1043,12 @@ id_string_own_string_server(Config) ->
     {ok,"SSH-2.0-Olle\r\n"} = gen_tcp:recv(S1, 0, 2000).
 
 %%--------------------------------------------------------------------
+id_string_own_string_server_trail_space(Config) ->
+    {_Server, Host, Port} = ssh_test_lib:std_daemon(Config, [{id_string,"Olle "}]),
+    {ok,S1}=ssh_test_lib:gen_tcp_connect(Host,Port,[{active,false},{packet,line}]),
+    {ok,"SSH-2.0-Olle \r\n"} = gen_tcp:recv(S1, 0, 2000).
+
+%%--------------------------------------------------------------------
 id_string_random_server(Config) ->
     {_Server, Host, Port} = ssh_test_lib:std_daemon(Config, [{id_string,random}]),
     {ok,S1}=ssh_test_lib:gen_tcp_connect(Host,Port,[{active,false},{packet,line}]),
@@ -1291,6 +1277,33 @@ try_to_connect(Connect, Host, Port, Pid, Tref, N) ->
      end.
 
 %%--------------------------------------------------------------------
+save_accepted_host_option(Config) ->
+    UserDir = proplists:get_value(user_dir, Config),
+    KnownHosts = filename:join(UserDir, "known_hosts"),
+    SysDir = proplists:get_value(data_dir, Config),	  
+    {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
+					     {user_dir, UserDir},
+					     {user_passwords, [{"vego", "morot"}]}
+                                            ]),
+    {error,enoent} = file:read_file(KnownHosts),
+
+    {ok,_C1} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                        {user, "vego"},
+                                        {password, "morot"},
+                                        {user_interaction, false},
+                                        {save_accepted_host, false},
+                                        {user_dir, UserDir}]),
+    {error,enoent} = file:read_file(KnownHosts),
+    
+    {ok,_C2} = ssh:connect(Host, Port, [{silently_accept_hosts, true},
+                                        {user, "vego"},
+                                        {password, "morot"},
+                                        {user_interaction, false},
+                                        {user_dir, UserDir}]),
+    {ok,_} = file:read_file(KnownHosts),
+    ssh:stop_daemon(Pid).
+
+%%--------------------------------------------------------------------
 %% Internal functions ------------------------------------------------
 %%--------------------------------------------------------------------
   
diff --git a/lib/ssh/test/ssh_protocol_SUITE.erl b/lib/ssh/test/ssh_protocol_SUITE.erl
index 74f802cf57..3e3e151781 100644
--- a/lib/ssh/test/ssh_protocol_SUITE.erl
+++ b/lib/ssh/test/ssh_protocol_SUITE.erl
@@ -630,11 +630,12 @@ client_handles_keyboard_interactive_0_pwds(Config) ->
 
 
 %%%--------------------------------------------------------------------
-client_info_line(_Config) ->
+client_info_line(Config) ->
     %% A client must not send an info-line. If it does, the server should handle
     %% handle this gracefully
     {ok,Pid} = ssh_eqc_event_handler:add_report_handler(),
-    {_, _, Port} = ssh_test_lib:daemon([]),
+    DataDir = proplists:get_value(data_dir, Config),
+    {_, _, Port} = ssh_test_lib:daemon([{system_dir,DataDir}]),
 
     %% Fake client:
     {ok,S} = gen_tcp:connect("localhost",Port,[]),
diff --git a/lib/ssh/test/ssh_renegotiate_SUITE.erl b/lib/ssh/test/ssh_renegotiate_SUITE.erl
deleted file mode 100644
index 74bbc291b2..0000000000
--- a/lib/ssh/test/ssh_renegotiate_SUITE.erl
+++ /dev/null
@@ -1,237 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2008-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-%%
-
--module(ssh_renegotiate_SUITE).
-
--include_lib("common_test/include/ct.hrl").
--include("ssh_test_lib.hrl").
-
-%% Note: This directive should only be used in test suites.
--compile(export_all).
-
--define(REKEY_DATA_TMO, 65000).
-%%--------------------------------------------------------------------
-%% Common Test interface functions -----------------------------------
-%%--------------------------------------------------------------------
-
-suite() -> [{ct_hooks,[ts_install_cth]},
-	    {timetrap,{seconds,40}}].
-
-all() -> [{group,default_algs},
-	  {group,aes_gcm}
-	 ].
-
-groups() -> [{default_algs, [], tests()},
-	     {aes_gcm,      [], tests()}
-	    ].
-
-tests() -> [rekey, rekey_limit, renegotiate1, renegotiate2].
-
-%%--------------------------------------------------------------------
-init_per_suite(Config) ->
-    ?CHECK_CRYPTO(Config).
-
-end_per_suite(_Config) ->
-    ssh:stop().
-
-%%--------------------------------------------------------------------
-init_per_group(aes_gcm, Config) ->
-    case lists:member({client2server,['[email protected]']},
-		      ssh_transport:supported_algorithms(cipher)) of
-	true ->
-	    [{preferred_algorithms, [{cipher,[{client2server,['[email protected]']},
-					      {server2client,['[email protected]']}]}]}
-	     | Config];
-	false ->
-	    {skip, "aes_gcm not supported"}
-    end;
-init_per_group(_, Config) ->
-    [{preferred_algorithms, ssh:default_algorithms()} | Config].
-
-
-end_per_group(_, Config) ->
-    Config.
-
-%%--------------------------------------------------------------------
-init_per_testcase(_TestCase, Config) ->
-    ssh:start(),
-    Config.
-
-end_per_testcase(_TestCase, _Config) ->
-    ssh:stop(),
-    ok.
-
-%%--------------------------------------------------------------------
-%% Test Cases --------------------------------------------------------
-%%--------------------------------------------------------------------
-
-%%% Idle timeout test
-rekey() -> [{timetrap,{seconds,90}}].
-    
-rekey(Config) ->
-    {Pid, Host, Port} = 
-	ssh_test_lib:std_daemon(Config,
-				[{rekey_limit, 0}]),
-    ConnectionRef =
-	ssh_test_lib:std_connect(Config, Host, Port, 
-				 [{rekey_limit, 0}]),
-    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
-    receive
-    after ?REKEY_DATA_TMO ->
-	    %%By this time rekeying would have been done
-	    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-	    false = (Kex2 == Kex1),
-	    ssh:close(ConnectionRef),
-	    ssh:stop_daemon(Pid)
-    end.
-
-%%--------------------------------------------------------------------
-
-%%% Test rekeying by data volume
-
-rekey_limit() -> [{timetrap,{seconds,400}}].
-
-rekey_limit(Config) ->
-    UserDir = proplists:get_value(priv_dir, Config),
-    DataFile = filename:join(UserDir, "rekey.data"),
-
-    Algs = proplists:get_value(preferred_algorithms, Config),
-    {Pid, Host, Port} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
-							{preferred_algorithms,Algs}]),
-
-    ConnectionRef = ssh_test_lib:std_connect(Config, Host, Port, [{rekey_limit, 6000},
-								  {max_random_length_padding,0}]),
-    {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
-
-    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    timer:sleep(?REKEY_DATA_TMO),
-    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    Data = lists:duplicate(159000,1),
-    ok = ssh_sftp:write_file(SftpPid, DataFile, Data),
-
-    timer:sleep(?REKEY_DATA_TMO),
-    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    false = (Kex2 == Kex1),
-
-    timer:sleep(?REKEY_DATA_TMO),
-    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    ok = ssh_sftp:write_file(SftpPid, DataFile, "hi\n"),
-
-    timer:sleep(?REKEY_DATA_TMO),
-    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    false = (Kex2 == Kex1),
-
-    timer:sleep(?REKEY_DATA_TMO),
-    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    ssh_sftp:stop_channel(SftpPid),
-    ssh:close(ConnectionRef),
-    ssh:stop_daemon(Pid).
-
-%%--------------------------------------------------------------------
-
-%%% Test rekeying with simulataneous send request
-
-renegotiate1(Config) ->
-    UserDir = proplists:get_value(priv_dir, Config),
-    DataFile = filename:join(UserDir, "renegotiate1.data"),
-
-    Algs = proplists:get_value(preferred_algorithms, Config),
-    {Pid, Host, DPort} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
-							 {preferred_algorithms,Algs}]),
-
-    RPort = ssh_test_lib:inet_port(),
-    {ok,RelayPid} = ssh_relay:start_link({0,0,0,0}, RPort, Host, DPort),
-
-
-    ConnectionRef = ssh_test_lib:std_connect(Config, Host, RPort, [{max_random_length_padding,0}]),
-    {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
-
-    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    {ok, Handle} = ssh_sftp:open(SftpPid, DataFile, [write]),
-
-    ok = ssh_sftp:write(SftpPid, Handle, "hi\n"),
-
-    ssh_relay:hold(RelayPid, rx, 20, 1000),
-    ssh_connection_handler:renegotiate(ConnectionRef),
-    spawn(fun() -> ok=ssh_sftp:write(SftpPid, Handle, "another hi\n") end),
-
-    timer:sleep(2000),
-
-    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    false = (Kex2 == Kex1),
-    
-    ssh_relay:stop(RelayPid),
-    ssh_sftp:stop_channel(SftpPid),
-    ssh:close(ConnectionRef),
-    ssh:stop_daemon(Pid).
-
-%%--------------------------------------------------------------------
-
-%%% Test rekeying with inflight messages from peer
-
-renegotiate2(Config) ->
-    UserDir = proplists:get_value(priv_dir, Config),
-    DataFile = filename:join(UserDir, "renegotiate2.data"),
-
-    Algs = proplists:get_value(preferred_algorithms, Config),
-    {Pid, Host, DPort} = ssh_test_lib:std_daemon(Config,[{max_random_length_padding,0},
-							 {preferred_algorithms,Algs}]),
-
-    RPort = ssh_test_lib:inet_port(),
-    {ok,RelayPid} = ssh_relay:start_link({0,0,0,0}, RPort, Host, DPort),
-
-    ConnectionRef = ssh_test_lib:std_connect(Config, Host, RPort, [{max_random_length_padding,0}]),
-    {ok, SftpPid} = ssh_sftp:start_channel(ConnectionRef),
-
-    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    {ok, Handle} = ssh_sftp:open(SftpPid, DataFile, [write]),
-
-    ok = ssh_sftp:write(SftpPid, Handle, "hi\n"),
-
-    ssh_relay:hold(RelayPid, rx, 20, infinity),
-    spawn(fun() -> ok=ssh_sftp:write(SftpPid, Handle, "another hi\n") end),
-    %% need a small pause here to ensure ssh_sftp:write is executed
-    ct:sleep(10),
-    ssh_connection_handler:renegotiate(ConnectionRef),
-    ssh_relay:release(RelayPid, rx),
-
-    timer:sleep(2000),
-
-    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-
-    false = (Kex2 == Kex1),
-
-    ssh_relay:stop(RelayPid),
-    ssh_sftp:stop_channel(SftpPid),
-    ssh:close(ConnectionRef),
-    ssh:stop_daemon(Pid).
-
-%%--------------------------------------------------------------------
-%% Internal functions ------------------------------------------------
-%%--------------------------------------------------------------------
diff --git a/lib/ssh/test/ssh_renegotiate_SUITE_data/id_dsa b/lib/ssh/test/ssh_renegotiate_SUITE_data/id_dsa
deleted file mode 100644
index d306f8b26e..0000000000
--- a/lib/ssh/test/ssh_renegotiate_SUITE_data/id_dsa
+++ /dev/null
@@ -1,13 +0,0 @@
------BEGIN DSA PRIVATE KEY-----
-MIIBvAIBAAKBgQDfi2flSTZZofwT4yQT0NikX/LGNT7UPeB/XEWe/xovEYCElfaQ
-APFixXvEgXwoojmZ5kiQRKzLM39wBP0jPERLbnZXfOOD0PDnw0haMh7dD7XKVMod
-/EigVgHf/qBdM2M8yz1s/rRF7n1UpLSypziKjkzCm7JoSQ2zbWIPdmBIXwIVAMgP
-kpr7Sq3O7sHdb8D601DRjoExAoGAMOQxDfB2Fd8ouz6G96f/UOzRMI/Kdv8kYYKW
-JIGY+pRYrLPyYzUeJznwZreOJgrczAX+luHnKFWJ2Dnk5CyeXk67Wsr7pJ/4MBMD
-OKeIS0S8qoSBN8+Krp79fgA+yS3IfqbkJLtLu4EBaCX4mKQIX4++k44d4U5lc8pt
-+9hlEI8CgYEAznKxx9kyC6bVo7LUYKaGhofRFt0SYFc5PVmT2VUGRs1R6+6DPD+e
-uEO6IhFct7JFSRbP9p0JD4Uk+3zlZF+XX6b2PsZkeV8f/02xlNGUSmEzCSiNg1AX
-Cy/WusYhul0MncWCHMcOZB5rIvU/aP5EJJtn3xrRaz6u0SThF6AnT34CFQC63czE
-ZU8w8Q+H7z0j+a+70x2iAw==
------END DSA PRIVATE KEY-----
-
diff --git a/lib/ssh/test/ssh_renegotiate_SUITE_data/id_rsa b/lib/ssh/test/ssh_renegotiate_SUITE_data/id_rsa
deleted file mode 100644
index 9d7e0dd5fb..0000000000
--- a/lib/ssh/test/ssh_renegotiate_SUITE_data/id_rsa
+++ /dev/null
@@ -1,15 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIICXAIBAAKBgQD1OET+3O/Bvj/dtjxDTXmj1oiJt4sIph5kGy0RfjoPrZfaS+CU
-DhakCmS6t2ivxWFgtpKWaoGMZMJqWj6F6ZsumyFl3FPBtujwY/35cgifrI9Ns4Tl
-zR1uuengNBmV+WRQ5cd9F2qS6Z8aDQihzt0r8JUqLcK+VQbrmNzboCCQQwIDAQAB
-AoGAPQEyqPTt8JUT7mRXuaacjFXiweAXhp9NEDpyi9eLOjtFe9lElZCrsUOkq47V
-TGUeRKEm9qSodfTbKPoqc8YaBJGJPhUaTAcha+7QcDdfHBvIsgxvU7ePVnlpXRp3
-CCUEMPhlnx6xBoTYP+fRU0e3+xJIPVyVCqX1jAdUMkzfRoECQQD6ux7B1QJAIWyK
-SGkbDUbBilNmzCFNgIpOP6PA+bwfi5d16diTpra5AX09keQABAo/KaP1PdV8Vg0p
-z4P3A7G3AkEA+l+AKG6m0kQTTBMJDqOdVPYwe+5GxunMaqmhokpEbuGsrZBl5Dvd
-WpcBjR7jmenrhKZRIuA+Fz5HPo/UQJPl1QJBAKxstDkeED8j/S2XoFhPKAJ+6t39
-sUVICVTIZQeXdmzHJXCcUSkw8+WEhakqw/3SyW0oaK2FSWQJFWJUZ+8eJj8CQEh3
-xeduB5kKnS9CvzdeghZqX6QvVosSdtlUmfUYW/BgH5PpHKTP8wTaeld3XldZTpMJ
-dKiMkUw2+XYROVUrubUCQD+Na1LhULlpn4ISEtIEfqpdlUhxDgO15Wg8USmsng+x
-ICliVOSQtwaZjm8kwaFt0W7XnpnDxbRs37vIEbIMWak=
------END RSA PRIVATE KEY-----
diff --git a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_dsa_key b/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_dsa_key
deleted file mode 100644
index 51ab6fbd88..0000000000
--- a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_dsa_key
+++ /dev/null
@@ -1,13 +0,0 @@
------BEGIN DSA PRIVATE KEY-----
-MIIBuwIBAAKBgQCClaHzE2ul0gKSUxah5W0W8UiJLy4hXngKEqpaUq9SSdVdY2LK
-wVfKH1gt5iuaf1FfzOhsIC9G/GLnjYttXZc92cv/Gfe3gR+s0ni2++MX+T++mE/Q
-diltXv/Hp27PybS67SmiFW7I+RWnT2OKlMPtw2oUuKeztCe5UWjaj/y5FQIVAPLA
-l9RpiU30Z87NRAHY3NTRaqtrAoGANMRxw8UfdtNVR0CrQj3AgPaXOGE4d+G4Gp4X
-skvnCHycSVAjtYxebUkzUzt5Q6f/IabuLUdge3gXrc8BetvrcKbp+XZgM0/Vj2CF
-Ymmy3in6kzGZq7Fw1sZaku6AOU8vLa5woBT2vAcHLLT1bLAzj7viL048T6MfjrOP
-ef8nHvACgYBhDWFQJ1mf99sg92LalVq1dHLmVXb3PTJDfCO/Gz5NFmj9EZbAtdah
-/XcF3DeRF+eEoz48wQF/ExVxSMIhLdL+o+ElpVhlM7Yii+T7dPhkQfEul6zZXu+U
-ykSTXYUbtsfTNRFQGBW2/GfnEc0mnIxfn9v10NEWMzlq5z9wT9P0CgIVAN4wtL5W
-Lv62jKcdskxNyz2NQoBx
------END DSA PRIVATE KEY-----
-
diff --git a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_dsa_key.pub b/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_dsa_key.pub
deleted file mode 100644
index 4dbb1305b0..0000000000
--- a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_dsa_key.pub
+++ /dev/null
@@ -1,11 +0,0 @@
----- BEGIN SSH2 PUBLIC KEY ----
-AAAAB3NzaC1kc3MAAACBAIKVofMTa6XSApJTFqHlbRbxSIkvLiFeeAoSqlpSr1JJ1V1j
-YsrBV8ofWC3mK5p/UV/M6GwgL0b8YueNi21dlz3Zy/8Z97eBH6zSeLb74xf5P76YT9B2
-KW1e/8enbs/JtLrtKaIVbsj5FadPY4qUw+3DahS4p7O0J7lRaNqP/LkVAAAAFQDywJfU
-aYlN9GfOzUQB2NzU0WqrawAAAIA0xHHDxR9201VHQKtCPcCA9pc4YTh34bganheyS+cI
-fJxJUCO1jF5tSTNTO3lDp/8hpu4tR2B7eBetzwF62+twpun5dmAzT9WPYIViabLeKfqT
-MZmrsXDWxlqS7oA5Ty8trnCgFPa8BwcstPVssDOPu+IvTjxPox+Os495/yce8AAAAIBh
-DWFQJ1mf99sg92LalVq1dHLmVXb3PTJDfCO/Gz5NFmj9EZbAtdah/XcF3DeRF+eEoz48
-wQF/ExVxSMIhLdL+o+ElpVhlM7Yii+T7dPhkQfEul6zZXu+UykSTXYUbtsfTNRFQGBW2
-/GfnEc0mnIxfn9v10NEWMzlq5z9wT9P0Cg==
----- END SSH2 PUBLIC KEY ----
diff --git a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_rsa_key b/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_rsa_key
deleted file mode 100644
index 79968bdd7d..0000000000
--- a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_rsa_key
+++ /dev/null
@@ -1,16 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIICXQIBAAKBgQDCZX+4FBDwZIh9y/Uxee1VJnEXlowpz2yDKwj8semM4q843337
-zbNfxHmladB1lpz2NqyxI175xMIJuDxogyZdsOxGnFAzAnthR4dqL/RWRWzjaxSB
-6IAO9SPYVVlrpZ+1hsjLW79fwXK/yc8VdhRuWTeQiRgYY2ek8+OKbOqz4QIDAQAB
-AoGANmvJzJO5hkLuvyDZHKfAnGTtpifcR1wtSa9DjdKUyn8vhKF0mIimnbnYQEmW
-NUUb3gXCZLi9PvkpRSVRrASDOZwcjoU/Kvww163vBUVb2cOZfFhyn6o2Sk88Tt++
-udH3hdjpf9i7jTtUkUe+QYPsia+wgvvrmn4QrahLAH86+kECQQDx5gFeXTME3cnW
-WMpFz3PPumduzjqgqMMWEccX4FtQkMX/gyGa5UC7OHFyh0N/gSWvPbRHa8A6YgIt
-n8DO+fh5AkEAzbqX4DOn8NY6xJIi42q7l/2jIA0RkB6P7YugW5NblhqBZ0XDnpA5
-sMt+rz+K07u9XZtxgh1xi7mNfwY6lEAMqQJBAJBEauCKmRj35Z6OyeQku59SPsnY
-+SJEREVvSNw2lH9SOKQQ4wPsYlTGbvKtNVZgAcen91L5MmYfeckYE/fdIZECQQCt
-64zxsTnM1I8iFxj/gP/OYlJBikrKt8udWmjaghzvLMEw+T2DExJyb9ZNeT53+UMB
-m6O+B/4xzU/djvp+0hbhAkAemIt+rA5kTmYlFndhpvzkSSM8a2EXsO4XIPgGWCTT
-tQKS/tTly0ADMjN/TVy11+9d6zcqadNVuHXHGtR4W0GR
------END RSA PRIVATE KEY-----
-
diff --git a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_rsa_key.pub b/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_rsa_key.pub
deleted file mode 100644
index 75d2025c71..0000000000
--- a/lib/ssh/test/ssh_renegotiate_SUITE_data/ssh_host_rsa_key.pub
+++ /dev/null
@@ -1,5 +0,0 @@
----- BEGIN SSH2 PUBLIC KEY ----
-AAAAB3NzaC1yc2EAAAADAQABAAAAgQDCZX+4FBDwZIh9y/Uxee1VJnEXlowpz2yDKwj8
-semM4q843337zbNfxHmladB1lpz2NqyxI175xMIJuDxogyZdsOxGnFAzAnthR4dqL/RW
-RWzjaxSB6IAO9SPYVVlrpZ+1hsjLW79fwXK/yc8VdhRuWTeQiRgYY2ek8+OKbOqz4Q==
----- END SSH2 PUBLIC KEY ----
diff --git a/lib/ssh/test/ssh_sftp_SUITE.erl b/lib/ssh/test/ssh_sftp_SUITE.erl
index 7aa3d8a00a..c2f9c0eba8 100644
--- a/lib/ssh/test/ssh_sftp_SUITE.erl
+++ b/lib/ssh/test/ssh_sftp_SUITE.erl
@@ -181,8 +181,9 @@ init_per_group(openssh_server, Config) ->
 	    [{peer, {fmt_host(IPx),Portx}}, {group, openssh_server} | Config];
 	{error,"Key exchange failed"} ->
 	    {skip, "openssh server doesn't support the tested kex algorithm"};
-	_ ->
-	    {skip, "No openssh server"} 
+	Other ->
+            ct:log("No openssh server. Cause:~n~p~n",[Other]),
+	    {skip, "No openssh daemon (see log in testcase)"} 
     end;
 
 init_per_group(remote_tar, Config) ->
diff --git a/lib/ssh/test/ssh_sftpd_SUITE.erl b/lib/ssh/test/ssh_sftpd_SUITE.erl
index 763649a12f..5fc948fbed 100644
--- a/lib/ssh/test/ssh_sftpd_SUITE.erl
+++ b/lib/ssh/test/ssh_sftpd_SUITE.erl
@@ -34,7 +34,7 @@
 -define(PASSWD, "Sesame").
 -define(XFER_PACKET_SIZE, 32768).
 -define(XFER_WINDOW_SIZE, 4*?XFER_PACKET_SIZE).
--define(TIMEOUT, 10000).
+-define(SSH_TIMEOUT, 10000).
 -define(REG_ATTERS, <<0,0,0,0,1>>).
 -define(UNIX_EPOCH,  62167219200).
 
@@ -161,9 +161,9 @@ init_per_testcase(TestCase, Config) ->
 			       {silently_accept_hosts, true}]),
     {ok, Channel} =
 	ssh_connection:session_channel(Cm, ?XFER_WINDOW_SIZE,
-				       ?XFER_PACKET_SIZE, ?TIMEOUT),
+				       ?XFER_PACKET_SIZE, ?SSH_TIMEOUT),
     
-    success = ssh_connection:subsystem(Cm, Channel, "sftp", ?TIMEOUT),
+    success = ssh_connection:subsystem(Cm, Channel, "sftp", ?SSH_TIMEOUT),
 
     ProtocolVer = case atom_to_list(TestCase) of
 		      "ver3_" ++ _ ->
diff --git a/lib/ssh/test/ssh_sup_SUITE.erl b/lib/ssh/test/ssh_sup_SUITE.erl
index 3920a1c592..b145066c36 100644
--- a/lib/ssh/test/ssh_sup_SUITE.erl
+++ b/lib/ssh/test/ssh_sup_SUITE.erl
@@ -42,7 +42,9 @@ suite() ->
 
 all() -> 
     [default_tree, sshc_subtree, sshd_subtree, sshd_subtree_profile,
-     killed_acceptor_restarts].
+     killed_acceptor_restarts,
+     shell_channel_tree
+    ].
 
 groups() -> 
     [].
@@ -199,8 +201,6 @@ killed_acceptor_restarts(Config) ->
     Port2 = ssh_test_lib:daemon_port(DaemonPid2),
     true = (Port /= Port2),
 
-    ct:pal("~s",[lists:flatten(ssh_info:string())]),
-
     {ok,[{AccPid,ListenAddr,Port}]} = acceptor_pid(DaemonPid),
     {ok,[{AccPid2,ListenAddr,Port2}]} = acceptor_pid(DaemonPid2),
 
@@ -214,37 +214,143 @@ killed_acceptor_restarts(Config) ->
                                               {user_dir, UserDir}]),
     [{client_version,_}] = ssh:connection_info(C1,[client_version]),
 
+    ct:log("~s",[lists:flatten(ssh_info:string())]),
+
     %% Make acceptor restart:
     exit(AccPid, kill),
+    ?wait_match(undefined, process_info(AccPid)),
 
-    %% Check it is a new acceptor:
-    {ok,[{AccPid1,ListenAddr,Port}]} = acceptor_pid(DaemonPid),
-    true = (AccPid /= AccPid1),
-    true = (AccPid2 /= AccPid1),
+    %% Check it is a new acceptor and wait if it is not:
+    ?wait_match({ok,[{AccPid1,ListenAddr,Port}]}, AccPid1=/=AccPid,
+                acceptor_pid(DaemonPid),
+                AccPid1,
+                500, 30),
+
+    true = (AccPid1 =/= AccPid2),
 
     %% Connect second client and check it is alive:
-    {ok,C2} = ssh:connect("localhost", Port, [{silently_accept_hosts, true},
-                                              {user_interaction, false},
-                                              {user, ?USER},
-                                              {password, ?PASSWD},
-                                              {user_dir, UserDir}]),
+    C2 =
+        case ssh:connect("localhost", Port, [{silently_accept_hosts, true},
+                                             {user_interaction, false},
+                                             {user, ?USER},
+                                             {password, ?PASSWD},
+                                             {user_dir, UserDir}]) of
+            {ok,_C2} ->
+                _C2;
+            _Other ->
+                ct:log("new connect failed: ~p~n~n~s",[_Other,lists:flatten(ssh_info:string())]),
+                ct:fail("Re-connect failed!", [])
+        end,
+
     [{client_version,_}] = ssh:connection_info(C2,[client_version]),
     
-    ct:pal("~s",[lists:flatten(ssh_info:string())]),
+    ct:log("~s",[lists:flatten(ssh_info:string())]),
 
     %% Check first client is still alive:
     [{client_version,_}] = ssh:connection_info(C1,[client_version]),
     
     ok = ssh:stop_daemon(DaemonPid2),
-    timer:sleep(15000),
+    ?wait_match(undefined, process_info(DaemonPid2), 1000, 30),
     [{client_version,_}] = ssh:connection_info(C1,[client_version]),
     [{client_version,_}] = ssh:connection_info(C2,[client_version]),
     
     ok = ssh:stop_daemon(DaemonPid),
-    timer:sleep(15000),
+    ?wait_match(undefined, process_info(DaemonPid), 1000, 30),
     {error,closed} = ssh:connection_info(C1,[client_version]),
     {error,closed} = ssh:connection_info(C2,[client_version]).
+
+%%-------------------------------------------------------------------------
+shell_channel_tree(Config) ->
+    PrivDir = proplists:get_value(priv_dir, Config),
+    UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
+    file:make_dir(UserDir),
+    SysDir = proplists:get_value(data_dir, Config),
+    TimeoutShell =
+        fun() ->
+                io:format("TimeoutShell started!~n",[]),
+                timer:sleep(5000),
+                ct:log("~p TIMEOUT!",[self()])
+        end,
+    {Daemon, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
+                                                {user_dir, UserDir},
+                                                {password, "morot"},
+                                                {shell, fun(_User) ->
+                                                                spawn(TimeoutShell)
+                                                        end
+                                                }
+                                            ]),
+    ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
+						      {user, "foo"},
+						      {password, "morot"},
+						      {user_interaction, true},
+						      {user_dir, UserDir}]),
+
+    [ChannelSup|_] = Sups0 = chk_empty_con_daemon(Daemon),
     
+    {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
+    ok = ssh_connection:shell(ConnectionRef,ChannelId0),
+
+    ?wait_match([{_, GroupPid,worker,[ssh_channel]}],
+		supervisor:which_children(ChannelSup),
+               [GroupPid]),
+    {links,GroupLinks} = erlang:process_info(GroupPid, links),
+    [ShellPid] = GroupLinks--[ChannelSup],
+    ct:log("GroupPid = ~p, ShellPid = ~p",[GroupPid,ShellPid]),
+
+    receive
+        {ssh_cm,ConnectionRef, {data, ChannelId0, 0, <<"TimeoutShell started!\r\n">>}} ->
+            receive
+                %%---- wait for the subsystem to terminate
+                {ssh_cm,ConnectionRef,{closed,ChannelId0}} ->
+                    ct:log("Subsystem terminated",[]),
+                    case {chk_empty_con_daemon(Daemon),
+                          process_info(GroupPid),
+                          process_info(ShellPid)} of
+                        {Sups0, undefined, undefined} ->
+                            %% SUCCESS
+                            ssh:stop_daemon(Daemon);
+                        {Sups0, _, undefined}  ->
+                            ssh:stop_daemon(Daemon),
+                            ct:fail("Group proc lives!");
+                        {Sups0, undefined, _}  ->
+                            ssh:stop_daemon(Daemon),
+                            ct:fail("Shell proc lives!");
+                        _ ->
+                            ssh:stop_daemon(Daemon),
+                            ct:fail("Sup tree changed!")
+                    end
+            after 10000 ->
+                    ssh:close(ConnectionRef),
+                    ssh:stop_daemon(Daemon),
+                    ct:fail("CLI Timeout")
+            end
+    after 10000 ->
+            ssh:close(ConnectionRef),
+            ssh:stop_daemon(Daemon),
+            ct:fail("CLI Timeout")
+    end.
+
+
+chk_empty_con_daemon(Daemon) ->
+    ?wait_match([{_,SubSysSup, supervisor,[ssh_subsystem_sup]},
+		 {{ssh_acceptor_sup,_,_,_}, AccSup, supervisor,[ssh_acceptor_sup]}],
+		supervisor:which_children(Daemon),
+                [SubSysSup,AccSup]),
+    ?wait_match([{{server,ssh_connection_sup, _,_},
+		  ConnectionSup, supervisor,
+		  [ssh_connection_sup]},
+		 {{server,ssh_channel_sup,_ ,_},
+		  ChannelSup,supervisor,
+		  [ssh_channel_sup]}],
+		supervisor:which_children(SubSysSup),
+		[ConnectionSup,ChannelSup]),
+    ?wait_match([{{ssh_acceptor_sup,_,_,_},_,worker,[ssh_acceptor]}],
+		supervisor:which_children(AccSup)),
+    ?wait_match([{_, _, worker,[ssh_connection_handler]}],
+		supervisor:which_children(ConnectionSup)),
+    ?wait_match([], supervisor:which_children(ChannelSup)),
+    [ChannelSup, ConnectionSup, SubSysSup, AccSup].
+
 %%-------------------------------------------------------------------------
 %% Help functions
 %%-------------------------------------------------------------------------
diff --git a/lib/ssh/test/ssh_test_lib.erl b/lib/ssh/test/ssh_test_lib.erl
index 83819b97a5..57ae2dbac2 100644
--- a/lib/ssh/test/ssh_test_lib.erl
+++ b/lib/ssh/test/ssh_test_lib.erl
@@ -28,9 +28,7 @@
 -include_lib("public_key/include/public_key.hrl").
 -include_lib("common_test/include/ct.hrl").
 -include_lib("ssh/src/ssh_transport.hrl").
-
-
--define(TIMEOUT, 50000).
+-include("ssh_test_lib.hrl").
 
 %%%----------------------------------------------------------------
 connect(Port, Options) when is_integer(Port) ->
@@ -58,7 +56,9 @@ daemon(Host, Port, Options) ->
     ct:log("~p:~p Calling ssh:daemon(~p, ~p, ~p)",[?MODULE,?LINE,Host,Port,Options]),
     case ssh:daemon(Host, Port, Options) of
 	{ok, Pid} ->
-            {ok,L} = ssh:daemon_info(Pid),
+            R = ssh:daemon_info(Pid),
+            ct:log("~p:~p ssh:daemon_info(~p) ->~n ~p",[?MODULE,?LINE,Pid,R]),
+            {ok,L} = R,
             ListenPort = proplists:get_value(port, L),
             ListenIP = proplists:get_value(ip, L),
 	    {Pid, ListenIP, ListenPort};
@@ -201,15 +201,17 @@ init_io_server(TestCase) ->
 
 loop_io_server(TestCase, Buff0) ->
      receive
-	 {input, TestCase, Line} ->
+	 {input, TestCase, Line} = _INP ->
+             %%ct:log("io_server ~p:~p ~p got ~p",[?MODULE,?LINE,self(),_INP]),
 	     loop_io_server(TestCase, Buff0 ++ [Line]);
-	 {io_request, From, ReplyAs, Request} ->
+	 {io_request, From, ReplyAs, Request} = _REQ->
+             %%ct:log("io_server ~p:~p ~p got ~p",[?MODULE,?LINE,self(),_REQ]),
 	     {ok, Reply, Buff} = io_request(Request, TestCase, From,
 					    ReplyAs, Buff0),
 	     io_reply(From, ReplyAs, Reply),
 	     loop_io_server(TestCase, Buff);
 	 {'EXIT',_, _} = _Exit ->
-%%	     ct:log("ssh_test_lib:loop_io_server/2 got ~p",[_Exit]),
+	     ct:log("ssh_test_lib:loop_io_server/2 got ~p",[_Exit]),
 	     ok
     after 
 	30000 -> ct:fail("timeout ~p:~p",[?MODULE,?LINE])
@@ -600,6 +602,7 @@ check_ssh_client_support2(P) ->
 	{P, {data, _A}} ->
 	    check_ssh_client_support2(P);
 	{P, {exit_status, E}} ->
+            ct:log("~p:~p exit_status:~n~p",[?MODULE,?LINE,E]),
 	    E
     after 5000 ->
 	    ct:log("Openssh command timed out ~n"),
@@ -651,14 +654,14 @@ default_algorithms(sshc, DaemonOptions) ->
 	{hostport,Srvr,{_Host,Port}} ->
 	    spawn(fun()-> os:cmd(lists:concat(["ssh -o \"StrictHostKeyChecking no\" -p ",Port," localhost"])) end)
     after ?TIMEOUT ->
-	    ct:fail("No server respons 1")
+	    ct:fail("No server respons (timeout) 1")
     end,
 
     receive
 	{result,Srvr,L} ->
 	    L
     after ?TIMEOUT ->
-	    ct:fail("No server respons 2")
+	    ct:fail("No server respons (timeout) 2")
     end.
 
 run_fake_ssh({ok,InitialState}) ->
@@ -772,12 +775,12 @@ ssh_type1() ->
 		not_found;
 	    Path ->
 		ct:log("~p:~p Found \"ssh\" at ~p",[?MODULE,?LINE,Path]),
-		case os:cmd("ssh -V") of
+                case installed_ssh_version(timeout) of
 		    Version = "OpenSSH" ++ _ ->
                         ct:log("~p:~p Found OpenSSH  ~p",[?MODULE,?LINE,Version]),
 			openSSH;
-		    Str -> 
-			ct:log("ssh client ~p is unknown",[Str]),
+                    Other ->
+			ct:log("ssh client ~p is unknown",[Other]),
 			unknown
 		end
 	end
@@ -787,6 +790,20 @@ ssh_type1() ->
 	    not_found
     end.
 
+installed_ssh_version(TimeoutReturn) ->
+    Parent = self(),
+    Pid = spawn(fun() ->
+                        Parent ! {open_ssh_version, os:cmd("ssh -V")}
+                end),
+    receive
+        {open_ssh_version, V} ->
+            V
+    after ?TIMEOUT ->
+            exit(Pid, kill),
+            TimeoutReturn
+    end.
+
+
 		   
 
 algo_intersection([], _) -> [];
diff --git a/lib/ssh/test/ssh_test_lib.hrl b/lib/ssh/test/ssh_test_lib.hrl
index 54c93b7e87..4b6579bd71 100644
--- a/lib/ssh/test/ssh_test_lib.hrl
+++ b/lib/ssh/test/ssh_test_lib.hrl
@@ -1,4 +1,9 @@
 %%-------------------------------------------------------------------------
+%% Timeout time in ms
+%%-------------------------------------------------------------------------
+-define(TIMEOUT, 27000).
+
+%%-------------------------------------------------------------------------
 %% Check for usable crypt 
 %%-------------------------------------------------------------------------
 -define(CHECK_CRYPTO(Available),
@@ -11,12 +16,12 @@
 %%-------------------------------------------------------------------------
 %% Help macro
 %%-------------------------------------------------------------------------
--define(wait_match(Pattern, FunctionCall, Bind, Timeout, Ntries),
+-define(wait_match(Pattern, Guard, FunctionCall, Bind, Timeout, Ntries),
 	Bind =
 	    (fun() -> 
 		     F = fun(N, F1) ->
 				 case FunctionCall of
-				     Pattern -> Bind;
+				     Pattern when Guard -> Bind;
 				     _ when N>0 ->
 					 ct:pal("Must sleep ~p ms at ~p:~p",[Timeout,?MODULE,?LINE]),
 					 timer:sleep(Timeout),
@@ -29,6 +34,9 @@
 	     end)()
        ).
 
+-define(wait_match(Pattern, FunctionCall, Bind, Timeout, Ntries),
+        ?wait_match(Pattern, true, FunctionCall, Bind, Timeout, Ntries)).
+
 -define(wait_match(Pattern, FunctionCall, Timeout, Ntries),  ?wait_match(Pattern, FunctionCall, ok, Timeout, Ntries)).
 
 -define(wait_match(Pattern, FunctionCall, Bind),  ?wait_match(Pattern, FunctionCall, Bind, 500, 10) ).
diff --git a/lib/ssh/test/ssh_to_openssh_SUITE.erl b/lib/ssh/test/ssh_to_openssh_SUITE.erl
index 75d5b5e296..9df404d7ed 100644
--- a/lib/ssh/test/ssh_to_openssh_SUITE.erl
+++ b/lib/ssh/test/ssh_to_openssh_SUITE.erl
@@ -27,7 +27,6 @@
 %% Note: This directive should only be used in test suites.
 -compile(export_all).
 
--define(TIMEOUT, 50000).
 -define(SSH_DEFAULT_PORT, 22).
 -define(REKEY_DATA_TMO, 65000).
 
@@ -49,19 +48,9 @@ all() ->
     end.
 
 groups() -> 
-    [{erlang_client, [], [erlang_shell_client_openssh_server,
-			  erlang_client_openssh_server_exec_compressed,
-			  erlang_client_openssh_server_setenv,
-			  erlang_client_openssh_server_publickey_dsa,
-			  erlang_client_openssh_server_publickey_rsa,
-			  erlang_client_openssh_server_password,
-			  erlang_client_openssh_server_kexs,
-			  erlang_client_openssh_server_nonexistent_subsystem,
-			  erlang_client_openssh_server_renegotiate
+    [{erlang_client, [], [erlang_shell_client_openssh_server
 			 ]},
-     {erlang_server, [], [erlang_server_openssh_client_public_key_dsa,
-			  erlang_server_openssh_client_public_key_rsa,
-			  erlang_server_openssh_client_renegotiate
+     {erlang_server, [], [erlang_server_openssh_client_renegotiate
 			 ]}
     ].
 
@@ -69,7 +58,7 @@ init_per_suite(Config) ->
     ?CHECK_CRYPTO(
        case gen_tcp:connect("localhost", 22, []) of
 	   {error,econnrefused} ->
-	       {skip,"No openssh deamon"};
+	       {skip,"No openssh deamon (econnrefused)"};
 	   _ ->
 	       ssh_test_lib:openssh_sanity_check(Config)
        end
@@ -101,15 +90,6 @@ end_per_group(_, Config) ->
     Config.
 
 
-init_per_testcase(erlang_server_openssh_client_public_key_dsa, Config) ->
-    chk_key(sshc, 'ssh-dss', ".ssh/id_dsa", Config);
-init_per_testcase(erlang_server_openssh_client_public_key_rsa, Config) ->
-    chk_key(sshc, 'ssh-rsa', ".ssh/id_rsa", Config);
-init_per_testcase(erlang_client_openssh_server_publickey_dsa, Config) ->
-    chk_key(sshd, 'ssh-dss', ".ssh/id_dsa", Config);
-init_per_testcase(erlang_client_openssh_server_publickey_rsa, Config) ->
-    chk_key(sshd, 'ssh-rsa', ".ssh/id_rsa", Config);
-
 init_per_testcase(erlang_server_openssh_client_renegotiate, Config) ->
     case os:type() of
 	{unix,_} -> ssh:start(), Config;
@@ -123,27 +103,6 @@ end_per_testcase(_TestCase, _Config) ->
     ssh:stop(),
     ok.
 
-
-chk_key(Pgm, Name, File, Config) ->
-    case ssh_test_lib:openssh_supports(Pgm, public_key, Name) of
-	false ->
-	    {skip,lists:concat(["openssh client does not support ",Name])};
-	true ->
-	    {ok,[[Home]]} = init:get_argument(home),
-	    KeyFile =  filename:join(Home, File),
-	    case file:read_file(KeyFile) of
-		{ok, Pem} ->
-		    case public_key:pem_decode(Pem) of
-			[{_,_, not_encrypted}] ->
-			    init_per_testcase('__default__',Config);
-			_ ->
-			    {skip, {error, "Has pass phrase can not be used by automated test case"}} 
-		    end;
-		_ ->
-		    {skip, lists:concat(["no ~/",File])}  
-	    end
-    end.
-
 %%--------------------------------------------------------------------
 %% Test Cases --------------------------------------------------------
 %%--------------------------------------------------------------------
@@ -161,219 +120,6 @@ erlang_shell_client_openssh_server(Config) when is_list(Config) ->
     receive_logout(),
     receive_normal_exit(Shell).
    
-%--------------------------------------------------------------------
-erlang_client_openssh_server_exec() ->
-    [{doc, "Test api function ssh_connection:exec"}].
-
-erlang_client_openssh_server_exec(Config) when is_list(Config) ->
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-							     {user_interaction, false}]),
-    {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity),
-    success = ssh_connection:exec(ConnectionRef, ChannelId0,
-				  "echo testing", infinity),
-    Data0 = {ssh_cm, ConnectionRef, {data, ChannelId0, 0, <<"testing\n">>}},
-    case ssh_test_lib:receive_exec_result(Data0) of
-	expected ->
-	    ssh_test_lib:receive_exec_end(ConnectionRef, ChannelId0);
-	{unexpected_msg,{ssh_cm, ConnectionRef, {exit_status, ChannelId0, 0}}
-	 = ExitStatus0} ->
-	    ct:log("0: Collected data ~p", [ExitStatus0]),
-	    ssh_test_lib:receive_exec_result(Data0,
-					     ConnectionRef, ChannelId0);
-	Other0 ->
-	    ct:fail(Other0)
-    end,
-
-    {ok, ChannelId1} = ssh_connection:session_channel(ConnectionRef, infinity),
-    success = ssh_connection:exec(ConnectionRef, ChannelId1,
-				  "echo testing1", infinity),
-    Data1 = {ssh_cm, ConnectionRef, {data, ChannelId1, 0, <<"testing1\n">>}},
-    case ssh_test_lib:receive_exec_result(Data1) of
-	expected ->
-	    ssh_test_lib:receive_exec_end(ConnectionRef, ChannelId1);
-	{unexpected_msg,{ssh_cm, ConnectionRef, {exit_status, ChannelId1, 0}}
-	 = ExitStatus1} ->
-	    ct:log("0: Collected data ~p", [ExitStatus1]),
-	    ssh_test_lib:receive_exec_result(Data1,
-					     ConnectionRef, ChannelId1);
-	Other1 ->
-	    ct:fail(Other1)
-    end.
-
-%%--------------------------------------------------------------------
-erlang_client_openssh_server_exec_compressed() ->
-    [{doc, "Test that compression option works"}].
-
-erlang_client_openssh_server_exec_compressed(Config) when is_list(Config) ->
-    CompressAlgs = [zlib, '[email protected]',none],
-    case ssh_test_lib:ssh_supports(CompressAlgs, compression) of
-	{false,L} ->
-	    {skip, io_lib:format("~p compression is not supported",[L])};
-
-	true ->
-	    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-								     {user_interaction, false},
-								     {preferred_algorithms,
-								      [{compression,CompressAlgs}]}]),
-	    {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
-	    success = ssh_connection:exec(ConnectionRef, ChannelId,
-					  "echo testing", infinity),
-	    Data = {ssh_cm, ConnectionRef, {data, ChannelId, 0, <<"testing\n">>}},
-	    case ssh_test_lib:receive_exec_result(Data) of
-		expected ->
-		    ssh_test_lib:receive_exec_end(ConnectionRef, ChannelId);
-		{unexpected_msg,{ssh_cm, ConnectionRef,
-				 {exit_status, ChannelId, 0}} = ExitStatus} ->
-		    ct:log("0: Collected data ~p", [ExitStatus]),
-		    ssh_test_lib:receive_exec_result(Data,  ConnectionRef, ChannelId);
-		Other ->
-		    ct:fail(Other)
-	    end
-    end.
-
-%%--------------------------------------------------------------------
-erlang_client_openssh_server_kexs() ->
-    [{doc, "Test that we can connect with different KEXs."}].
-
-erlang_client_openssh_server_kexs(Config) when is_list(Config) ->
-    KexAlgos = try proplists:get_value(kex, proplists:get_value(common_algs,Config))
-	       catch _:_ -> []
-	       end,
-    comment(KexAlgos),
-    case KexAlgos of
-	[] -> {skip, "No common kex algorithms"};
-	_ ->
-	    Success =
-		lists:foldl(
-		  fun(Kex, Acc) ->
-			  ConnectionRef = 
-			      ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-								       {user_interaction, false},
-								       {preferred_algorithms,
-									[{kex,[Kex]}]}]),
-
-			  {ok, ChannelId} =
-			      ssh_connection:session_channel(ConnectionRef, infinity),
-			  success =
-			      ssh_connection:exec(ConnectionRef, ChannelId,
-						  "echo testing", infinity),
-
-			  ExpectedData = {ssh_cm, ConnectionRef, {data, ChannelId, 0, <<"testing\n">>}},
-			  case ssh_test_lib:receive_exec_result(ExpectedData) of
-			      expected ->
-				  ssh_test_lib:receive_exec_end(ConnectionRef, ChannelId),
-				  Acc;
-			      {unexpected_msg,{ssh_cm, ConnectionRef,
-					       {exit_status, ChannelId, 0}} = ExitStatus} ->
-				  ct:log("0: Collected data ~p", [ExitStatus]),
-				  ssh_test_lib:receive_exec_result(ExpectedData,  ConnectionRef, ChannelId),
-				  Acc;
-			      Other ->
-				  ct:log("~p failed: ~p",[Kex,Other]),
-				  false
-			  end
-		  end, true, KexAlgos),
-	    case Success of
-		true ->
-		    ok;
-		false ->
-		    {fail, "Kex failed for one or more algos"}
-	    end
-    end.
-
-%%--------------------------------------------------------------------
-erlang_client_openssh_server_setenv() ->
-    [{doc, "Test api function ssh_connection:setenv"}].
-
-erlang_client_openssh_server_setenv(Config) when is_list(Config) ->
-    ConnectionRef =
-	ssh_test_lib:connect(?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-						 {user_interaction, false}]),
-    {ok, ChannelId} =
-	ssh_connection:session_channel(ConnectionRef, infinity),
-    Env = case ssh_connection:setenv(ConnectionRef, ChannelId,
-				     "ENV_TEST", "testing_setenv",
-				     infinity) of
-	      success ->
-		  <<"tesing_setenv\n">>;
-	      failure ->
-		  <<"\n">>
-	  end,
-    success = ssh_connection:exec(ConnectionRef, ChannelId,
-				  "echo $ENV_TEST", infinity),
-    Data = {ssh_cm, ConnectionRef, {data, ChannelId, 0, Env}},
-    case ssh_test_lib:receive_exec_result(Data) of
-	expected ->
-	    ssh_test_lib:receive_exec_end(ConnectionRef, ChannelId);
-	{unexpected_msg,{ssh_cm, ConnectionRef,
-			 {data,0,1, UnxpectedData}}} ->
-	    %% Some os may return things as
-	    %% ENV_TEST: Undefined variable.\n"
-	    ct:log("UnxpectedData: ~p", [UnxpectedData]),
-	    ssh_test_lib:receive_exec_end(ConnectionRef, ChannelId);
-	{unexpected_msg,{ssh_cm, ConnectionRef, {exit_status, ChannelId, 0}}
-	 = ExitStatus} ->
-	    ct:log("0: Collected data ~p", [ExitStatus]),
-	    ssh_test_lib:receive_exec_result(Data,
-					     ConnectionRef, ChannelId);
-	Other ->
-	    ct:fail(Other)
-    end.
-
-%%--------------------------------------------------------------------
-
-%% setenv not meaningfull on erlang ssh daemon!
-
-%%--------------------------------------------------------------------
-erlang_client_openssh_server_publickey_rsa(Config) ->
-    erlang_client_openssh_server_publickey_X(Config, 'ssh-rsa').
-    
-erlang_client_openssh_server_publickey_dsa(Config) ->
-    erlang_client_openssh_server_publickey_X(Config, 'ssh-dss').
-
-
-erlang_client_openssh_server_publickey_X(_Config, Alg) ->
-    ConnectionRef =
-        ssh_test_lib:connect(?SSH_DEFAULT_PORT,
-                             [{pref_public_key_algs, [Alg]},
-                              {user_interaction, false},
-                              {auth_methods, "publickey"},
-                              silently_accept_hosts]),
-    {ok, Channel} =
-        ssh_connection:session_channel(ConnectionRef, infinity),
-    ok = ssh_connection:close(ConnectionRef, Channel),
-    ok = ssh:close(ConnectionRef).
-
-%%--------------------------------------------------------------------
-erlang_server_openssh_client_public_key_dsa() ->
-    [{timetrap, {seconds,(?TIMEOUT div 1000)+10}}].
-erlang_server_openssh_client_public_key_dsa(Config) when is_list(Config) ->
-    erlang_server_openssh_client_public_key_X(Config, 'ssh-dss').
-
-erlang_server_openssh_client_public_key_rsa() -> 
-    [{timetrap, {seconds,(?TIMEOUT div 1000)+10}}].
-erlang_server_openssh_client_public_key_rsa(Config) when is_list(Config) ->
-    erlang_server_openssh_client_public_key_X(Config, 'ssh-rsa').
-
-
-erlang_server_openssh_client_public_key_X(Config, Alg) ->
-    SystemDir = proplists:get_value(data_dir, Config),
-    PrivDir = proplists:get_value(priv_dir, Config),
-    KnownHosts = filename:join(PrivDir, "known_hosts"),
-    {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SystemDir},
-                                             {preferred_algorithms,[{public_key, [Alg]}]},
-                                             {auth_methods, "publickey"},
-					     {failfun, fun ssh_test_lib:failfun/2}]),
-    ct:sleep(500),
-
-    Cmd = ssh_test_lib:open_sshc_cmd(Host, Port,
-                                     [" -o UserKnownHostsFile=", KnownHosts,
-                                      " -o StrictHostKeyChecking=no"],
-                                     "1+1."),
-    OpenSsh = ssh_test_lib:open_port({spawn, Cmd}),
-    ssh_test_lib:rcv_expected({data,<<"2\n">>}, OpenSsh, ?TIMEOUT),
-    ssh:stop_daemon(Pid).
-
 %%--------------------------------------------------------------------
 %% Test that the Erlang/OTP server can renegotiate with openSSH
 erlang_server_openssh_client_renegotiate(Config) ->
@@ -431,108 +177,6 @@ erlang_server_openssh_client_renegotiate(Config) ->
     end.
 
 %%--------------------------------------------------------------------
-erlang_client_openssh_server_renegotiate(_Config) ->
-    process_flag(trap_exit, true),
-    IO = ssh_test_lib:start_io_server(),
-    Ref = make_ref(),
-    Parent = self(),
-
-    Shell = 
-	spawn_link(
-	  fun() ->
-		  Host = ssh_test_lib:hostname(),
-		  Options = [{user_interaction, false},
-			     {silently_accept_hosts,true}],
-		  group_leader(IO, self()),
-		  {ok, ConnRef} = ssh:connect(Host, ?SSH_DEFAULT_PORT, Options),
-                  ct:log("Parent = ~p, IO = ~p, Shell = ~p, ConnRef = ~p~n",[Parent, IO, self(), ConnRef]),
-		  case ssh_connection:session_channel(ConnRef, infinity) of
-		      {ok,ChannelId}  ->
-			  success = ssh_connection:ptty_alloc(ConnRef, ChannelId, []),
-			  Args = [{channel_cb, ssh_shell},
-				  {init_args,[ConnRef, ChannelId]},
-				  {cm, ConnRef}, {channel_id, ChannelId}],
-			  {ok, State} = ssh_channel:init([Args]),
-			  Parent ! {ok, Ref, ConnRef},
-			  ssh_channel:enter_loop(State);
-		      Error ->
-			  Parent ! {error, Ref, Error}
-		  end,
-		  receive
-		      nothing -> ok
-		  end
-	  end),
-
-    receive
-	{error, Ref, Error} ->
-	    ct:fail("Error=~p",[Error]);
-	{ok, Ref, ConnectionRef} ->
-	    IO ! {input, self(), "echo Hej1\n"},
-	    receive_data("Hej1", ConnectionRef),
-	    Kex1 = ssh_test_lib:get_kex_init(ConnectionRef),
-	    ssh_connection_handler:renegotiate(ConnectionRef),
-	    IO ! {input, self(), "echo Hej2\n"},
-	    receive_data("Hej2", ConnectionRef),
-	    Kex2 = ssh_test_lib:get_kex_init(ConnectionRef),
-	    IO ! {input, self(), "exit\n"},
-	    receive_logout(),
-	    receive_normal_exit(Shell),
-	    true = (Kex1 =/= Kex2)
-    end.
-
-%%--------------------------------------------------------------------
-erlang_client_openssh_server_password() ->
-    [{doc, "Test client password option"}].
-erlang_client_openssh_server_password(Config) when is_list(Config) ->
-    %% to make sure we don't public-key-auth
-    UserDir = proplists:get_value(data_dir, Config),
-    {error, Reason0} =
-	ssh:connect(any, ?SSH_DEFAULT_PORT, [{silently_accept_hosts, true},
-					     {user, "foo"},
-					     {password, "morot"},
-					     {user_interaction, false},
-					     {user_dir, UserDir}]),
-    
-    ct:log("Test of user foo that does not exist. "
-		       "Error msg: ~p~n", [Reason0]),
-
-    User = string:strip(os:cmd("whoami"), right, $\n),
-
-    case length(string:tokens(User, " ")) of
-	1 ->
-	    {error, Reason1} =
-		ssh:connect(any, ?SSH_DEFAULT_PORT,
-			    [{silently_accept_hosts, true},
-			     {user, User},
-			     {password, "foo"},
-			     {user_interaction, false},
-			     {user_dir, UserDir}]),
-	    ct:log("Test of wrong Pasword.  "
-			       "Error msg: ~p~n", [Reason1]);
-	_ ->
-	    ct:log("Whoami failed reason: ~n", [])
-	end.
-
-%%--------------------------------------------------------------------
-
-erlang_client_openssh_server_nonexistent_subsystem() ->
-    [{doc, "Test client password option"}].
-erlang_client_openssh_server_nonexistent_subsystem(Config) when is_list(Config) ->
-
-    ConnectionRef = ssh_test_lib:connect(?SSH_DEFAULT_PORT,
-					 [{user_interaction, false},
-					  silently_accept_hosts]),
-
-    {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
-
-    failure = ssh_connection:subsystem(ConnectionRef, ChannelId, "foo", infinity).
-
-%%--------------------------------------------------------------------
-%
-%% Not possible to send password with openssh without user interaction
-%%
-%%--------------------------------------------------------------------
-%%--------------------------------------------------------------------
 %%% Internal functions -----------------------------------------------
 %%--------------------------------------------------------------------
 receive_data(Data, Conn) ->
diff --git a/lib/ssh/vsn.mk b/lib/ssh/vsn.mk
index 5154658e8a..d5eed0b087 100644
--- a/lib/ssh/vsn.mk
+++ b/lib/ssh/vsn.mk
@@ -1,5 +1,4 @@
 #-*-makefile-*-   ; force emacs to enter makefile-mode
 
-SSH_VSN = 4.6.1
-
+SSH_VSN = 4.6.7
 APP_VSN    = "ssh-$(SSH_VSN)"
diff --git a/lib/ssl/doc/src/Makefile b/lib/ssl/doc/src/Makefile
index d54ef47461..f9128e8e45 100644
--- a/lib/ssl/doc/src/Makefile
+++ b/lib/ssl/doc/src/Makefile
@@ -43,9 +43,9 @@ XML_REF6_FILES = ssl_app.xml
 
 XML_PART_FILES = usersguide.xml
 XML_CHAPTER_FILES = \
+	ssl_introduction.xml \
 	ssl_protocol.xml \
 	using_ssl.xml \
-	pkix_certs.xml \
 	ssl_distribution.xml \
 	notes.xml
 
diff --git a/lib/ssl/doc/src/notes.xml b/lib/ssl/doc/src/notes.xml
index 4c6a204e63..4ad7da9486 100644
--- a/lib/ssl/doc/src/notes.xml
+++ b/lib/ssl/doc/src/notes.xml
@@ -27,6 +27,227 @@
   </header>
   <p>This document describes the changes made to the SSL application.</p>
 
+<section><title>SSL 8.2.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix filter function to not incorrectly exclude AEAD
+	    cipher suites</p>
+          <p>
+	    Own Id: OTP-14981</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>SSL 8.2.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Optimization of bad merge conflict resolution causing
+	    dubble decode</p>
+          <p>
+	    Own Id: OTP-14843</p>
+        </item>
+        <item>
+          <p>
+	    Restore error propagation to OTP-19.3 behaviour, in
+	    OTP-20.2 implementation adjustments to gen_statem needed
+	    some further adjustments to avoid a race condition. This
+	    could cause a TLS server to not always report file path
+	    errors correctly.</p>
+          <p>
+	    Own Id: OTP-14852</p>
+        </item>
+        <item>
+          <p>
+	    Corrected RC4 suites listing function to regard TLS
+	    version</p>
+          <p>
+	    Own Id: OTP-14871</p>
+        </item>
+        <item>
+          <p>
+	    Fix alert handling so that unexpected messages are logged
+	    and alerted correctly</p>
+          <p>
+	    Own Id: OTP-14919</p>
+        </item>
+        <item>
+          <p>
+	    Correct handling of anonymous cipher suites</p>
+          <p>
+	    Own Id: OTP-14952</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Added new API functions to facilitate cipher suite
+	    handling</p>
+          <p>
+	    Own Id: OTP-14760</p>
+        </item>
+        <item>
+          <p>
+	    Correct TLS_FALLBACK_SCSV handling so that this special
+	    flag suite is always placed last in the cipher suite list
+	    in accordance with the specs. Also make sure this
+	    functionality is used in DTLS.</p>
+          <p>
+	    Own Id: OTP-14828</p>
+        </item>
+        <item>
+          <p>
+	    Add TLS record version sanity check for early as possible
+	    error detection and consistency in ALERT codes generated</p>
+          <p>
+	    Own Id: OTP-14892</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>SSL 8.2.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Packet options cannot be supported for unreliable
+	    transports, that is, packet option for DTLS over udp will
+	    not be supported.</p>
+          <p>
+	    Own Id: OTP-14664</p>
+        </item>
+        <item>
+          <p>
+	    Ensure data delivery before close if possible. This fix
+	    is related to fix in PR-1479.</p>
+          <p>
+	    Own Id: OTP-14794</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    The crypto API is extended to use private/public keys
+	    stored in an Engine for sign/verify or encrypt/decrypt
+	    operations.</p>
+          <p>
+	    The ssl application provides an API to use this new
+	    engine concept in TLS.</p>
+          <p>
+	    Own Id: OTP-14448</p>
+        </item>
+        <item>
+          <p>
+	    Implemented renegotiation for DTLS</p>
+          <p>
+	    Own Id: OTP-14563</p>
+        </item>
+        <item>
+          <p>
+	    A new command line option <c>-ssl_dist_optfile</c> has
+	    been added to facilitate specifying the many options
+	    needed when using SSL as the distribution protocol.</p>
+          <p>
+	    Own Id: OTP-14657</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>SSL 8.2.2</title>
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    TLS sessions must be registered with SNI if provided, so
+	    that sessions where client hostname verification would
+	    fail can not connect reusing a session created when the
+	    server name verification succeeded.</p>
+          <p>
+	    Own Id: OTP-14632</p>
+        </item>
+        <item>
+	    <p> An erlang TLS server configured with cipher suites
+	    using rsa key exchange, may be vulnerable to an Adaptive
+	    Chosen Ciphertext attack (AKA Bleichenbacher attack)
+	    against RSA, which when exploited, may result in
+	    plaintext recovery of encrypted messages and/or a
+	    Man-in-the-middle (MiTM) attack, despite the attacker not
+	    having gained access to the server’s private key
+	    itself. <url
+	    href="https://nvd.nist.gov/vuln/detail/CVE-2017-1000385">CVE-2017-1000385</url>
+	    </p> <p> Exploiting this vulnerability to perform
+	    plaintext recovery of encrypted messages will, in most
+	    practical cases, allow an attacker to read the plaintext
+	    only after the session has completed. Only TLS sessions
+	    established using RSA key exchange are vulnerable to this
+	    attack. </p> <p> Exploiting this vulnerability to conduct
+	    a MiTM attack requires the attacker to complete the
+	    initial attack, which may require thousands of server
+	    requests, during the handshake phase of the targeted
+	    session within the window of the configured handshake
+	    timeout. This attack may be conducted against any TLS
+	    session using RSA signatures, but only if cipher suites
+	    using RSA key exchange are also enabled on the server.
+	    The limited window of opportunity, limitations in
+	    bandwidth, and latency make this attack significantly
+	    more difficult to execute. </p> <p> RSA key exchange is
+	    enabled by default although least prioritized if server
+	    order is honored. For such a cipher suite to be chosen it
+	    must also be supported by the client and probably the
+	    only shared cipher suite. </p> <p> Captured TLS sessions
+	    encrypted with ephemeral cipher suites (DHE or ECDHE) are
+	    not at risk for subsequent decryption due to this
+	    vulnerability. </p> <p> As a workaround if default cipher
+	    suite configuration was used you can configure the server
+	    to not use vulnerable suites with the ciphers option like
+	    this: </p> <c> {ciphers, [Suite || Suite &lt;-
+	    ssl:cipher_suites(), element(1,Suite) =/= rsa]} </c> <p>
+	    that is your code will look somethingh like this: </p>
+	    <c> ssl:listen(Port, [{ciphers, [Suite || Suite &lt;-
+	    ssl:cipher_suites(), element(1,S) =/= rsa]} | Options]).
+	    </c> <p> Thanks to Hanno Böck, Juraj Somorovsky and
+	    Craig Young for reporting this vulnerability. </p>
+          <p>
+	    Own Id: OTP-14748</p>
+        </item>
+      </list>
+    </section>
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    If no SNI is available and the hostname is an IP-address
+	    also check for IP-address match. This check is not as
+	    good as a DNS hostname check and certificates using
+	    IP-address are not recommended.</p>
+          <p>
+	    Own Id: OTP-14655</p>
+        </item>
+      </list>
+    </section>
+
+</section>
 
 <section><title>SSL 8.2.1</title>
 
@@ -175,9 +396,74 @@
         </item>
       </list>
     </section>
+</section>
+
+<section><title>SSL 8.1.3.1.1</title>
 
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    Fix alert handling so that unexpected messages are logged
+	    and alerted correctly</p>
+          <p>
+	    Own Id: OTP-14929</p>
+        </item>
+      </list>
+    </section>
 </section>
 
+<section><title>SSL 8.1.3.1</title>
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> An erlang TLS server configured with cipher suites
+	    using rsa key exchange, may be vulnerable to an Adaptive
+	    Chosen Ciphertext attack (AKA Bleichenbacher attack)
+	    against RSA, which when exploited, may result in
+	    plaintext recovery of encrypted messages and/or a
+	    Man-in-the-middle (MiTM) attack, despite the attacker not
+	    having gained access to the server’s private key
+	    itself. <url
+	    href="https://nvd.nist.gov/vuln/detail/CVE-2017-1000385">CVE-2017-1000385</url>
+	    </p> <p> Exploiting this vulnerability to perform
+	    plaintext recovery of encrypted messages will, in most
+	    practical cases, allow an attacker to read the plaintext
+	    only after the session has completed. Only TLS sessions
+	    established using RSA key exchange are vulnerable to this
+	    attack. </p> <p> Exploiting this vulnerability to conduct
+	    a MiTM attack requires the attacker to complete the
+	    initial attack, which may require thousands of server
+	    requests, during the handshake phase of the targeted
+	    session within the window of the configured handshake
+	    timeout. This attack may be conducted against any TLS
+	    session using RSA signatures, but only if cipher suites
+	    using RSA key exchange are also enabled on the server.
+	    The limited window of opportunity, limitations in
+	    bandwidth, and latency make this attack significantly
+	    more difficult to execute. </p> <p> RSA key exchange is
+	    enabled by default although least prioritized if server
+	    order is honored. For such a cipher suite to be chosen it
+	    must also be supported by the client and probably the
+	    only shared cipher suite. </p> <p> Captured TLS sessions
+	    encrypted with ephemeral cipher suites (DHE or ECDHE) are
+	    not at risk for subsequent decryption due to this
+	    vulnerability. </p> <p> As a workaround if default cipher
+	    suite configuration was used you can configure the server
+	    to not use vulnerable suites with the ciphers option like
+	    this: </p> <c> {ciphers, [Suite || Suite &lt;-
+	    ssl:cipher_suites(), element(1,Suite) =/= rsa]} </c> <p>
+	    that is your code will look somethingh like this: </p>
+	    <c> ssl:listen(Port, [{ciphers, [Suite || Suite &lt;-
+	    ssl:cipher_suites(), element(1,S) =/= rsa]} | Options]).
+	    </c> <p> Thanks to Hanno Böck, Juraj Somorovsky and
+	    Craig Young for reporting this vulnerability. </p>
+          <p>
+	    Own Id: OTP-14748</p>
+        </item>
+      </list>
+    </section>
+</section>
 <section><title>SSL 8.1.3</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
@@ -556,6 +842,60 @@
 
 </section>
 
+ <section><title>SSL 7.3.3.2</title>
+
+      <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+	<item>
+	  <p> An erlang TLS server configured with cipher suites
+	  using rsa key exchange, may be vulnerable to an Adaptive
+	  Chosen Ciphertext attack (AKA Bleichenbacher attack)
+	  against RSA, which when exploited, may result in
+	  plaintext recovery of encrypted messages and/or a
+	  Man-in-the-middle (MiTM) attack, despite the attacker not
+	  having gained access to the server’s private key
+	  itself. <url
+	  href="https://nvd.nist.gov/vuln/detail/CVE-2017-1000385">CVE-2017-1000385</url>
+	  </p> <p> Exploiting this vulnerability to perform
+	  plaintext recovery of encrypted messages will, in most
+	  practical cases, allow an attacker to read the plaintext
+	  only after the session has completed. Only TLS sessions
+	  established using RSA key exchange are vulnerable to this
+	  attack. </p> <p> Exploiting this vulnerability to conduct
+	  a MiTM attack requires the attacker to complete the
+	  initial attack, which may require thousands of server
+	  requests, during the handshake phase of the targeted
+	  session within the window of the configured handshake
+	  timeout. This attack may be conducted against any TLS
+	  session using RSA signatures, but only if cipher suites
+	  using RSA key exchange are also enabled on the server.
+	  The limited window of opportunity, limitations in
+	  bandwidth, and latency make this attack significantly
+	  more difficult to execute. </p> <p> RSA key exchange is
+	  enabled by default although least prioritized if server
+	  order is honored. For such a cipher suite to be chosen it
+	  must also be supported by the client and probably the
+	  only shared cipher suite. </p> <p> Captured TLS sessions
+	  encrypted with ephemeral cipher suites (DHE or ECDHE) are
+	  not at risk for subsequent decryption due to this
+	  vulnerability. </p> <p> As a workaround if default cipher
+	  suite configuration was used you can configure the server
+	  to not use vulnerable suites with the ciphers option like
+	  this: </p> <c> {ciphers, [Suite || Suite &lt;-
+	  ssl:cipher_suites(), element(1,Suite) =/= rsa]} </c> <p>
+	  that is your code will look somethingh like this: </p>
+	  <c> ssl:listen(Port, [{ciphers, [Suite || Suite &lt;-
+	  ssl:cipher_suites(), element(1,S) =/= rsa]} | Options]).
+	  </c> <p> Thanks to Hanno Böck, Juraj Somorovsky and
+	  Craig Young for reporting this vulnerability. </p>
+	  <p>
+	  Own Id: OTP-14748</p>
+	</item>
+	    </list>
+      </section>
+      
+  </section>
+
 <section><title>SSL 7.3.3</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
@@ -585,7 +925,59 @@
       </list>
     </section>
 
+ <section><title>SSL 7.3.3.0.1</title>
 
+      <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+	<item>
+	  <p> An erlang TLS server configured with cipher suites
+	  using rsa key exchange, may be vulnerable to an Adaptive
+	  Chosen Ciphertext attack (AKA Bleichenbacher attack)
+	  against RSA, which when exploited, may result in
+	  plaintext recovery of encrypted messages and/or a
+	  Man-in-the-middle (MiTM) attack, despite the attacker not
+	  having gained access to the server’s private key
+	  itself. <url
+	  href="https://nvd.nist.gov/vuln/detail/CVE-2017-1000385">CVE-2017-1000385</url>
+	  </p> <p> Exploiting this vulnerability to perform
+	  plaintext recovery of encrypted messages will, in most
+	  practical cases, allow an attacker to read the plaintext
+	  only after the session has completed. Only TLS sessions
+	  established using RSA key exchange are vulnerable to this
+	  attack. </p> <p> Exploiting this vulnerability to conduct
+	  a MiTM attack requires the attacker to complete the
+	  initial attack, which may require thousands of server
+	  requests, during the handshake phase of the targeted
+	  session within the window of the configured handshake
+	  timeout. This attack may be conducted against any TLS
+	  session using RSA signatures, but only if cipher suites
+	  using RSA key exchange are also enabled on the server.
+	  The limited window of opportunity, limitations in
+	  bandwidth, and latency make this attack significantly
+	  more difficult to execute. </p> <p> RSA key exchange is
+	  enabled by default although least prioritized if server
+	  order is honored. For such a cipher suite to be chosen it
+	  must also be supported by the client and probably the
+	  only shared cipher suite. </p> <p> Captured TLS sessions
+	  encrypted with ephemeral cipher suites (DHE or ECDHE) are
+	  not at risk for subsequent decryption due to this
+	  vulnerability. </p> <p> As a workaround if default cipher
+	  suite configuration was used you can configure the server
+	  to not use vulnerable suites with the ciphers option like
+	  this: </p> <c> {ciphers, [Suite || Suite &lt;-
+	  ssl:cipher_suites(), element(1,Suite) =/= rsa]} </c> <p>
+	  that is your code will look somethingh like this: </p>
+	  <c> ssl:listen(Port, [{ciphers, [Suite || Suite &lt;-
+	  ssl:cipher_suites(), element(1,S) =/= rsa]} | Options]).
+	  </c> <p> Thanks to Hanno Böck, Juraj Somorovsky and
+	  Craig Young for reporting this vulnerability. </p>
+	  <p>
+	  Own Id: OTP-14748</p>
+	</item>
+	    </list>
+      </section>
+      
+  </section>
     <section><title>Improvements and New Features</title>
       <list>
         <item>
diff --git a/lib/ssl/doc/src/pkix_certs.xml b/lib/ssl/doc/src/pkix_certs.xml
deleted file mode 100644
index f365acef4d..0000000000
--- a/lib/ssl/doc/src/pkix_certs.xml
+++ /dev/null
@@ -1,59 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<!DOCTYPE chapter SYSTEM "chapter.dtd">
-
-<chapter>
-  <header>
-    <copyright>
-      <year>2003</year><year>2016</year>
-      <holder>Ericsson AB. All Rights Reserved.</holder>
-    </copyright>
-    <legalnotice>
-      Licensed under the Apache License, Version 2.0 (the "License");
-      you may not use this file except in compliance with the License.
-      You may obtain a copy of the License at
- 
-          http://www.apache.org/licenses/LICENSE-2.0
-
-      Unless required by applicable law or agreed to in writing, software
-      distributed under the License is distributed on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-      See the License for the specific language governing permissions and
-      limitations under the License.
-    
-    </legalnotice>
-
-    <title>PKIX Certificates</title>
-    <prepared>UAB/F/P Peter H&ouml;gfeldt</prepared>
-    <docno></docno>
-    <date>2003-06-09</date>
-    <rev>A</rev>
-    <file>pkix_certs.xml</file>
-  </header>
-
-  <section>
-    <title>Introduction to Certificates</title>
-    <p>Certificates were originally defined by ITU (CCITT) and the latest 
-      definitions are described in <cite id="X.509"></cite>, but those definitions
-      are (as always) not working. 
-    </p>
-    <p>Working certificate definitions for the Internet Community are found
-      in the the PKIX RFCs <cite id="rfc3279"></cite> and <cite id="rfc3280"></cite>. 
-      The parsing of certificates in the Erlang/OTP SSL application is
-      based on those RFCS. 
-    </p>
-    <p>Certificates are defined in terms of ASN.1 (<cite id="X.680"></cite>).
-      For an introduction to ASN.1 see <url href="http://asn1.elibel.tm.fr/">ASN.1 Information Site</url>.
-    </p>    
-  </section>
-
-  <section>
-    <title>PKIX Certificates</title>
-    <p>Certificate handling is now handled by the <c>public_key</c> application.</p>
-    <p>
-      DER encoded certificates returned by <c>ssl:peercert/1</c> can for example 
-      be decoded by the <c>public_key:pkix_decode_cert/2</c> function. 
-    </p>
-  </section>
-</chapter>
-
-
diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml
index ca2dcbb761..8c1b1541c7 100644
--- a/lib/ssl/doc/src/ssl.xml
+++ b/lib/ssl/doc/src/ssl.xml
@@ -32,7 +32,7 @@
   <modulesummary>Interface Functions for Secure Socket Layer</modulesummary>
   <description>
     <p>
-      This module contains interface functions for the SSL/TLS protocol.
+      This module contains interface functions for the SSL/TLS/DTLS protocol.
       For detailed information about the supported standards see 
       <seealso marker="ssl_app">ssl(6)</seealso>.
     </p>
@@ -40,7 +40,7 @@
     
   <section>
     <title>DATA TYPES</title>
-    <p>The following data types are used in the functions for SSL:</p>
+    <p>The following data types are used in the functions for SSL/TLS/DTLS:</p>
 
     <taglist>
 
@@ -56,9 +56,11 @@
       <p>The default socket options are
       <c>[{mode,list},{packet, 0},{header, 0},{active, true}]</c>.</p>
       <p>For valid options, see the
-      <seealso marker="kernel:inet">inet(3)</seealso> and
-      <seealso marker="kernel:gen_tcp">gen_tcp(3)</seealso> manual pages
-      in Kernel.</p></item>
+      <seealso marker="kernel:inet">inet(3)</seealso>,
+      <seealso marker="kernel:gen_tcp">gen_tcp(3)</seealso> and
+      <seealso marker="kernel:gen_tcp">gen_udp(3)</seealso> 
+      manual pages
+      in Kernel. Note that stream oriented options such as packet are only relevant for SSL/TLS and not DTLS</p></item>
 
       <tag><marker id="type-ssloption"/><c>ssl_option() =</c></tag>
       <item>
@@ -69,7 +71,9 @@
 	<p><c>| {cert, public_key:der_encoded()}</c></p>
 	<p><c>| {certfile, path()}</c></p>
 	<p><c>| {key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey' 
-	| 'PrivateKeyInfo', public_key:der_encoded()}}</c></p>
+	| 'PrivateKeyInfo', public_key:der_encoded()} |
+	#{algorithm := rsa | dss | ecdsa,
+	engine := crypto:engine_ref(), key_id := crypto:key_id(), password => crypto:password()}</c></p>
 	<p><c>| {keyfile, path()}</c></p>
 	<p><c>| {password, string()}</c></p>
 	<p><c>| {cacerts, [public_key:der_encoded()]}</c></p>
@@ -93,13 +97,14 @@
       <item><p><c>{cb_info, {CallbackModule::atom(), DataTag::atom(),
 
       ClosedTag::atom(), ErrTag:atom()}}</c></p>
-      <p>Defaults to <c>{gen_tcp, tcp, tcp_closed, tcp_error}</c>. Can be used
-      to customize the transport layer. The callback module must implement a
+      <p>Defaults to <c>{gen_tcp, tcp, tcp_closed, tcp_error}</c> for TLS
+      and <c>{gen_udp, udp, udp_closed, udp_error}</c> for DTLS. Can be used
+      to customize the transport layer. For TLS the callback module must implement a
       reliable transport protocol, behave as <c>gen_tcp</c>, and have functions
       corresponding to <c>inet:setopts/2</c>, <c>inet:getopts/2</c>,
       <c>inet:peername/1</c>, <c>inet:sockname/1</c>, and <c>inet:port/1</c>.
       The callback <c>gen_tcp</c> is treated specially and calls <c>inet</c>
-      directly.</p>
+      directly. For DTLS this feature must be considered exprimental.</p>
       <taglist>
 	<tag><c>CallbackModule =</c></tag>
 	<item><p><c>atom()</c></p></item>
@@ -135,18 +140,26 @@
 
       <tag><c>sslsocket() =</c></tag>
       <item><p>opaque()</p></item>
-
-      <tag><marker id="type-protocol"/><c>protocol() =</c></tag>
+      
+      <tag><marker id="type-protocol"/><c> protocol_version() =</c></tag>
+      <item><p><c> ssl_tls_protocol() |  dtls_protocol() </c></p></item>
+      
       <item><p><c>sslv3 | tlsv1 | 'tlsv1.1' | 'tlsv1.2'</c></p></item>
 
+      <tag><marker id="type-protocol"/><c> dtls_protocol() =</c></tag>
+      <item><p><c>'dtlsv1' | 'dtlsv1.2'</c></p></item>
+
       <tag><c>ciphers() =</c></tag>
-      <item><p><c>= [ciphersuite()] | string()</c></p>
-      <p>According to old API.</p></item>
+      <item><p><c>= [ciphersuite()]</c></p>
+      <p>Tuples and string formats accepted by versions
+      before ssl-8.2.4 will be converted for backwards compatibility</p></item>
 
       <tag><c>ciphersuite() =</c></tag>
-
-      <item><p><c>{key_exchange(), cipher(), MAC::hash()} |
-      {key_exchange(), cipher(), MAC::hash(), PRF::hash()}</c></p></item>
+      <item><p><c>
+      #{key_exchange := key_exchange(),
+        cipher := cipher(),
+        mac := MAC::hash() | aead,
+        prf := PRF::hash() | default_prf} </c></p></item>
 
       <tag><c>key_exchange()=</c></tag>
       <item><p><c>rsa | dhe_dss | dhe_rsa | dh_anon | psk | dhe_psk
@@ -163,6 +176,12 @@
       <tag><c>prf_random() =</c></tag>
       <item><p><c>client_random | server_random</c></p></item>
 
+      <tag><c>cipher_filters() =</c></tag>
+      <item><p><c> [{key_exchange | cipher | mac | prf, algo_filter()}])</c></p></item>
+
+      <tag><c>algo_filter() =</c></tag>
+      <item><p>fun(key_exchange() | cipher() | hash() | aead | default_prf) -> true | false </p></item>
+
       <tag><c>srp_param_type() =</c></tag>
       <item><p><c>srp_1024 | srp_1536 | srp_2048 | srp_3072
       | srp_4096 | srp_6144 | srp_8192</c></p></item>
@@ -182,7 +201,7 @@
   </section>
 
   <section>
-    <title>SSL OPTION DESCRIPTIONS - COMMON for SERVER and CLIENT</title>
+    <title>TLS/DTLS OPTION DESCRIPTIONS - COMMON for SERVER and CLIENT</title>
 
     <p>The following options have the same meaning in the client and 
     the server:</p>
@@ -201,9 +220,15 @@
       <tag><c>{certfile, path()}</c></tag>
       <item><p>Path to a file containing the user certificate.</p></item>
       
-      <tag><c>{key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey'
-      |'PrivateKeyInfo', public_key:der_encoded()}}</c></tag>
-      <item><p>The DER-encoded user's private key. If this option 
+      <tag>
+	<marker id="key_option_def"/>
+	<c>{key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey'
+      |'PrivateKeyInfo', public_key:der_encoded()} |  #{algorithm := rsa | dss | ecdsa,
+	engine := crypto:engine_ref(), key_id :=  crypto:key_id(), password => crypto:password()}</c></tag>
+      <item><p>The DER-encoded user's private key or a map refering to a crypto
+      engine and its key reference that optionally can be password protected,
+      seealso <seealso marker="crypto:crypto#engine_load-4"> crypto:engine_load/4
+      </seealso> and  <seealso marker="crypto:engine_load"> Crypto's Users Guide</seealso>. If this option 
       is supplied, it overrides option <c>keyfile</c>.</p></item>
       
       <tag><c>{keyfile, path()}</c></tag>
@@ -239,8 +264,9 @@
       <item><p>Specifies if to reject renegotiation attempt that does
       not live up to 
       <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url>. 
-      By default <c>secure_renegotiate</c> is set to <c>false</c>, 
-      that is, secure renegotiation is used if possible,
+      By default <c>secure_renegotiate</c> is set to <c>true</c>, 
+      that is, secure renegotiation is enforced. If set to <c>false</c> secure renegotiation
+      will still be used if possible,
       but it falls back to insecure renegotiation if the peer
       does not support 
       <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url>.</p>
@@ -281,11 +307,11 @@ atom()}} |
 	<list type="bulleted">
 	  <item><p>If the verify callback fun returns <c>{fail, Reason}</c>,
 	  the verification process is immediately stopped, an alert is
-	  sent to the peer, and the TLS/SSL handshake terminates.</p></item>
+	  sent to the peer, and the TLS/DTLS handshake terminates.</p></item>
 	  <item><p>If the verify callback fun returns <c>{valid, UserState}</c>,
 	  the verification process continues.</p></item> 
 	  <item><p>If the verify callback fun always returns
-	  <c>{valid, UserState}</c>, the TLS/SSL handshake does not
+	  <c>{valid, UserState}</c>, the TLS/DTLS handshake does not
 	  terminate regarding verification failures and the connection is
 	  established.</p></item>
 	  <item><p>If called with an extension unknown to the user application,
@@ -448,15 +474,16 @@ marker="public_key:public_key#pkix_path_validation-3">public_key:pkix_path_valid
       marker="public_key:public_key#pkix_path_validation-3">public_key:pkix_path_validation/3</seealso>
       with the selected CA as trusted anchor and the rest of the chain.</p></item>
 
-      <tag><c>{versions, [protocol()]}</c></tag>
+      <tag><c>{versions, [protocol_version()]}</c></tag>
+
       <item><p>TLS protocol versions supported by started clients and servers.
       This option overrides the application environment option
-      <c>protocol_version</c>. If the environment option is not set, it defaults
+      <c>protocol_version</c> and  <c>dtls_protocol_version</c>. If the environment option is not set, it defaults
       to all versions, except SSL-3.0, supported by the SSL application.
       See also <seealso marker="ssl:ssl_app">ssl(6).</seealso></p></item>
 
       <tag><c>{hibernate_after, integer()|undefined}</c></tag>
-      <item><p>When an integer-value is specified, <c>ssl_connection</c>
+      <item><p>When an integer-value is specified, <c>TLS/DTLS-connection</c>
       goes into hibernation after the specified number of milliseconds
       of inactivity, thus reducing its memory footprint. When
       <c>undefined</c> is specified (this is the default), the process
@@ -516,7 +543,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
   </section>
   
   <section>
-    <title>SSL OPTION DESCRIPTIONS - CLIENT SIDE</title>
+    <title>TLS/DTLS OPTION DESCRIPTIONS - CLIENT SIDE</title>
 
     <p>The following options are client-specific or have a slightly different
     meaning in the client than in the server:</p>
@@ -589,22 +616,19 @@ fun(srp, Username :: string(), UserState :: term()) ->
 
       <tag><c>{server_name_indication, HostName :: hostname()}</c></tag>
       <item><p>Specify the hostname to be used in TLS Server Name Indication extension.
-      Is usefull when upgrading a TCP socket to a TLS socket or if the hostname can not be 
-      derived from the Host argument to <seealso marker="ssl#connect-3">ssl:connect/3</seealso>.
-      Will also cause the client to preform host name verification of the peer certificate
-      <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname(PeerCert, [{dns_id, HostName}])</seealso>
-      </p> during the x509-path validation. If the check fails the error {bad_cert, hostname_check_failiure} will be
-      propagated to the path validation fun <seealso marker="#verify_fun">verify_fun</seealso>
-      </item>
-
-	<tag><c>{server_name_indication, disable}</c></tag>
-      <item>
-        <p>When starting a TLS connection without upgrade, the Server Name
-        Indication extension is sent if possible that is can be derived from the Host argument 
-        to <seealso marker="ssl#connect-3">ssl:connect/3</seealso>.  
-	This option can be used to disable that behavior.</p>
-	<note><p> Note that this also disables the default host name verification check of the peer certificate.</p></note>
+      If not specified it will default to the <c>Host</c> argument of <seealso marker="#connect-3">connect/[3,4]</seealso>
+      unless it is of type inet:ipaddress().</p>
+      <p>
+	The <c>HostName</c> will also be used in the hostname verification of the peer certificate using
+	<seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso>.
+      </p>
       </item>
+      <tag><c>{server_name_indication, disable}</c></tag>
+	<item>
+          <p> Prevents the Server Name Indication extension from being sent and
+	  disables the hostname verification check
+	  <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso> </p>
+	</item>
       <tag><c>{fallback, boolean()}</c></tag>
       <item>
 	<p> Send special cipher suite TLS_FALLBACK_SCSV to avoid undesired TLS version downgrade.
@@ -659,7 +683,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
    </section>
    
   <section>
-    <title>SSL OPTION DESCRIPTIONS - SERVER SIDE</title>
+    <title>TLS/DTLS OPTION DESCRIPTIONS - SERVER SIDE</title>
 
     <p>The following options are server-specific or have a slightly different
     meaning in the server than in the client:</p>
@@ -697,7 +721,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
       </p></item>
 
       <tag><c>{fail_if_no_peer_cert, boolean()}</c></tag>
-      <item><p>Used together with <c>{verify, verify_peer}</c> by an SSL server.
+      <item><p>Used together with <c>{verify, verify_peer}</c> by an TLS/DTLS server.
       If set to <c>true</c>, the server fails if the client does not have
       a certificate to send, that is, sends an empty certificate. If set to
       <c>false</c>, it fails only if the client sends an invalid
@@ -711,7 +735,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
 
       <tag><c>{reuse_session, fun(SuggestedSessionId,
       PeerCert, Compression, CipherSuite) -> boolean()}</c></tag>
-      <item><p>Enables the SSL server to have a local policy
+      <item><p>Enables the TLS/DTLS server to have a local policy
       for deciding if a session is to be reused or not.
       Meaningful only if <c>reuse_sessions</c> is set to <c>true</c>.
       <c>SuggestedSessionId</c> is a <c>binary()</c>, <c>PeerCert</c> is
@@ -797,19 +821,13 @@ fun(srp, Username :: string(), UserState :: term()) ->
       client certificate is requested. For more details see the <seealso marker="#client_signature_algs">corresponding client option</seealso>.
       </p> </item>
 
-      <tag><c>{v2_hello_compatible, boolean()}</c></tag>
-      <item>If true, the server accepts clients that send hello messages on SSL-2.0 format but offers 
-      supported SSL/TLS versions. Defaults to false, that is the server will not interoperate with clients that
-      offers SSL-2.0.
-      </item>
-     
     </taglist>
   </section>
   
   <section>
     <title>General</title>
       
-    <p>When an SSL socket is in active mode (the default), data from the
+    <p>When an TLS/DTLS socket is in active mode (the default), data from the
       socket is delivered to the owner of the socket in the form of
       messages:</p>
 
@@ -824,14 +842,34 @@ fun(srp, Username :: string(), UserState :: term()) ->
   </section>
   
   <funcs>
+
+    <func>
+      <name>append_cipher_suites(Deferred, Suites) -> ciphers() </name>
+      <fsummary></fsummary>
+      <type>
+           <v>Deferred = ciphers() | cipher_filters() </v>
+	   <v>Suites  = ciphers() </v>
+      </type>
+      <desc><p>Make <c>Deferred</c> suites become the least preferred
+      suites, that is put them at the end of the cipher suite list
+      <c>Suites</c> after removing them from <c>Suites</c> if
+      present. <c>Deferred</c> may be a list of cipher suits or a
+      list of filters in which case the filters are use on  <c>Suites</c> to
+      extract the Deferred cipher list.</p> 
+      </desc>
+    </func>
+    
     <func>
       <name>cipher_suites() -></name>
-      <name>cipher_suites(Type) -> ciphers()</name>
+      <name>cipher_suites(Type) -> old_ciphers()</name>
       <fsummary>Returns a list of supported cipher suites.</fsummary>
       <type>
         <v>Type = erlang | openssl | all</v>
       </type>
-      <desc><p>Returns a list of supported cipher suites.
+      <desc>
+	<p>Returns a list of supported cipher suites.
+	This function will become deprecated in OTP 21, and replaced
+	by <seealso marker="#cipher_suites-2">ssl:cipher-suites/2</seealso>
 	<c>cipher_suites()</c> is equivalent to <c>cipher_suites(erlang).</c>
 	Type <c>openssl</c> is provided for backwards compatibility with the
 	old SSL, which used OpenSSL. <c>cipher_suites(all)</c> returns
@@ -839,12 +877,26 @@ fun(srp, Username :: string(), UserState :: term()) ->
 	in <c>cipher_suites(erlang)</c> but included in
 	<c>cipher_suites(all)</c> are not used unless explicitly configured
 	by the user.</p>
+      </desc>
+    </func>
+    
+   <func>
+      <name>cipher_suites(Supported, Version) ->  ciphers()</name>
+      <fsummary>Returns a list of all default or
+      all supported cipher suites.</fsummary>
+      <type>
+        <v> Supported = default | all | anonymous </v>
+	<v> Version = protocol_version() </v>
+      </type>
+      <desc><p>Returns all default or all supported (except anonymous),
+      or all anonymous cipher suites for a
+      TLS version</p>
     </desc>
     </func>
 
     <func>
       <name>eccs() -></name>
-      <name>eccs(protocol()) -> [named_curve()]</name>
+      <name>eccs(protocol_version()) -> [named_curve()]</name>
       <fsummary>Returns a list of supported ECCs.</fsummary>
 
       <desc><p>Returns a list of supported ECCs. <c>eccs()</c>
@@ -852,7 +904,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
       supported protocols and then deduplicating the output.</p>
       </desc>
     </func>
-
+    
     <func>
       <name>clear_pem_cache() -> ok </name>
       <fsummary> Clears the pem cache</fsummary>
@@ -867,20 +919,26 @@ fun(srp, Username :: string(), UserState :: term()) ->
    
     <func>
       <name>connect(Socket, SslOptions) -> </name>
-      <name>connect(Socket, SslOptions, Timeout) -> {ok, SslSocket}
+      <name>connect(Socket, SslOptions, Timeout) -> {ok, TLSSocket}
 	| {error, Reason}</name>
       <fsummary>Upgrades a <c>gen_tcp</c>, or
-	equivalent, connected socket to an SSL socket.</fsummary>
+	equivalent, connected socket to an TLS socket.</fsummary>
       <type>
 	<v>Socket = socket()</v>
 	<v>SslOptions = [ssl_option()]</v>
 	<v>Timeout = integer() | infinity</v>
-	<v>SslSocket = sslsocket()</v>
+	<v>TLSSocket = sslsocket()</v>
 	<v>Reason = term()</v>
       </type>
       <desc><p>Upgrades a <c>gen_tcp</c>, or equivalent,
-	  connected socket to an SSL socket, that is, performs the
-	  client-side ssl handshake.</p>
+	  connected socket to an TLS socket, that is, performs the
+	  client-side TLS handshake.</p>
+	  
+	  <note><p>If the option <c>verify</c> is set to <c>verify_peer</c>
+	  the option <c>server_name_indication</c> shall also be specified,
+	  if it is not no Server Name Indication extension will be sent,
+	  and <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso>
+	  will be called with the IP-address of the connection as <c>ReferenceID</c>, which is proably not what you want.</p></note>
     </desc>
     </func>
 
@@ -888,7 +946,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
       <name>connect(Host, Port, Options) -></name>
       <name>connect(Host, Port, Options, Timeout) ->
 	  {ok, SslSocket} | {error, Reason}</name>
-      <fsummary>Opens an SSL connection to <c>Host</c>, <c>Port</c>.</fsummary>
+      <fsummary>Opens an TLS/DTLS connection to <c>Host</c>, <c>Port</c>.</fsummary>
       <type>
 	  <v>Host = host()</v>
 	  <v>Port = integer()</v>
@@ -897,29 +955,46 @@ fun(srp, Username :: string(), UserState :: term()) ->
 	  <v>SslSocket = sslsocket()</v>
 	  <v>Reason = term()</v>
       </type>
-      <desc><p>Opens an SSL connection to <c>Host</c>, <c>Port</c>.</p></desc>
+      <desc><p>Opens an TLS/DTLS connection to <c>Host</c>, <c>Port</c>.</p>
+      
+      <p> When the option <c>verify</c> is set to <c>verify_peer</c> the check 
+      <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso> 
+      will be performed in addition to the usual x509-path validation checks. If the check fails the error {bad_cert, hostname_check_failed} will
+      be propagated to the path validation fun <seealso marker="#verify_fun">verify_fun</seealso>, where it is possible to do customized
+      checks by using the full possibilities of the <seealso marker="public_key:public_key#pkix_verify_hostname-3">public_key:pkix_verify_hostname/3</seealso> API.
+      
+      When the option <c>server_name_indication</c> is provided, its value (the DNS name) will be used as <c>ReferenceID</c>
+      to <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso>.
+      When no <c>server_name_indication</c> option is given, the <c>Host</c> argument will be used as
+      Server Name Indication extension. The <c>Host</c> argument will also be used for the
+      <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso> check and if the <c>Host</c>
+      argument is an <c>inet:ip_address()</c> the <c>ReferenceID</c> used for the check will be <c>{ip, Host}</c> otherwise
+      <c>dns_id</c> will be assumed with a fallback to <c>ip</c> if that fails. </p>
+      <note><p>According to good practices certificates should not use IP-addresses as "server names". It would
+      be very surprising if this happen outside a closed network. </p></note> 
+      </desc>
     </func>
 
     <func>
       <name>close(SslSocket) -> ok | {error, Reason}</name>
-      <fsummary>Closes an SSL connection.</fsummary>
+      <fsummary>Closes an TLS/DTLS connection.</fsummary>
       <type>
 	  <v>SslSocket = sslsocket()</v>
 	  <v>Reason = term()</v>
       </type>
-      <desc><p>Closes an SSL connection.</p>
+      <desc><p>Closes an TLS/DTLS connection.</p>
       </desc>
     </func>
 
     <func>
       <name>close(SslSocket, How) -> ok | {ok, port()} | {error, Reason}</name>
-      <fsummary>Closes an SSL connection.</fsummary>
+      <fsummary>Closes an TLS connection.</fsummary>
       <type>
 	  <v>SslSocket = sslsocket()</v>
 	  <v>How =  timeout() | {NewController::pid(), timeout()} </v>
 	  <v>Reason = term()</v>
       </type>
-      <desc><p>Closes or downgrades an SSL connection. In the latter case the transport
+      <desc><p>Closes or downgrades an TLS connection. In the latter case the transport
       connection will be handed over to the <c>NewController</c> process after receiving
       the TLS close alert from the peer. The returned transport socket will have
       the following options set: <c>[{active, false}, {packet, 0}, {mode, binary}]</c></p>
@@ -930,7 +1005,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
       <name>controlling_process(SslSocket, NewOwner) ->
 	ok | {error, Reason}</name>
 	<fsummary>Assigns a new controlling process to the
-	SSL socket.</fsummary>
+	TLS/DTLS socket.</fsummary>
 	<type>
 	  <v>SslSocket = sslsocket()</v>
 	  <v>NewOwner = pid()</v>
@@ -980,6 +1055,21 @@ fun(srp, Username :: string(), UserState :: term()) ->
       </desc>
     </func>
 
+      <func>
+      <name>filter_cipher_suites(Suites, Filters) -> ciphers()</name>
+      <fsummary></fsummary>
+      <type>
+	<v> Suites = ciphers()</v>
+        <v> Filters = cipher_filters()</v>
+      </type>
+      <desc><p>Removes cipher suites if any of the filter functions
+      returns false for any part of the cipher suite. This function
+      also calls default filter functions to make sure the cipher
+      suites are supported by crypto. If no filter function is supplied for some
+      part the default behaviour is fun(Algorithm) -> true.</p>
+    </desc>
+    </func>
+    
     <func>
       <name>format_error(Reason) -> string()</name>
       <fsummary>Returns an error string.</fsummary>
@@ -1077,6 +1167,22 @@ fun(srp, Username :: string(), UserState :: term()) ->
         <p>Returns the address and port number of the peer.</p>
       </desc>
     </func>
+    
+      <func>
+      <name>prepend_cipher_suites(Preferred, Suites) -> ciphers()</name>
+      <fsummary></fsummary>
+      <type>
+        <v>Preferred = ciphers() | cipher_filters() </v>
+	<v>Suites = ciphers() </v>
+      </type>
+      <desc><p>Make <c>Preferred</c> suites become the most preferred
+      suites that is put them at the head of the cipher suite list
+      <c>Suites</c> after removing them from <c>Suites</c> if
+      present. <c>Preferred</c> may be a list of cipher suits or a
+      list of filters in which case the filters are use on <c>Suites</c> to
+      extract the preferred cipher list. </p>
+      </desc>
+    </func>
 
     <func>
       <name>prf(Socket, Secret, Label, Seed, WantedLength) -> {ok, binary()} | {error, reason()}</name>
@@ -1093,7 +1199,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
 	  extra key material. It either takes user-generated values for
 	  <c>Secret</c> and <c>Seed</c> or atoms directing it to use a specific
 	  value from the session security parameters.</p>
-        <p>Can only be used with TLS connections; <c>{error, undefined}</c>
+        <p>Can only be used with TLS/DTLS connections; <c>{error, undefined}</c>
 	  is returned for SSLv3 connections.</p>
       </desc>
     </func>
@@ -1193,7 +1299,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
         <v>Reason = term()</v>
       </type>
       <desc>
-        <p>Performs the SSL/TLS server-side handshake.</p>
+        <p>Performs the SSL/TLS/DTLS server-side handshake.</p>
 	<p><c>Socket</c> is a socket as returned by
 	<seealso marker="#transport_accept-2">ssl:transport_accept/[1,2]</seealso>
 	</p>
@@ -1203,7 +1309,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
     <func>
       <name>ssl_accept(Socket, SslOptions) -> </name>
       <name>ssl_accept(Socket, SslOptions, Timeout) -> {ok, Socket} | ok | {error, Reason}</name>
-      <fsummary>Performs server-side SSL/TLS handshake.</fsummary>
+      <fsummary>Performs server-side SSL/TLS/DTLS handshake.</fsummary>
       <type>
         <v>Socket = socket() | sslsocket() </v>
 	<v>SslOptions = [ssl_option()]</v>
@@ -1220,10 +1326,10 @@ fun(srp, Username :: string(), UserState :: term()) ->
 	by calling this function, else the upgrade succeeds or does not
 	succeed depending on timing.</p></warning>
 	
-	<p>If <c>Socket</c> is an <c>sslsocket()</c>: provides extra SSL/TLS
+	<p>If <c>Socket</c> is an <c>sslsocket()</c>: provides extra SSL/TLS/DTLS
 	options to those specified in
 	<seealso marker="#listen-2">ssl:listen/2 </seealso> and then performs
-	the SSL/TLS handshake.
+	the SSL/TLS/DTLS handshake.
 	</p>
       </desc>
     </func>
@@ -1282,7 +1388,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
 	The socket returned is to be passed to
 	<seealso marker="#ssl_accept-2"> ssl:ssl_accept[2,3]</seealso>
 	to complete handshaking, that is,
-	establishing the SSL/TLS connection.</p>
+	establishing the SSL/TLS/DTLS connection.</p>
         <warning>
           <p>The socket returned can only be used with
 	  <seealso marker="#ssl_accept-2"> ssl:ssl_accept[2,3]</seealso>.
@@ -1304,7 +1410,8 @@ fun(srp, Username :: string(), UserState :: term()) ->
       <fsummary>Returns version information relevant for the
 	SSL application.</fsummary>
       <type>
-	<v>versions_info() = {app_vsn, string()} | {supported | available, [protocol()] </v>
+	<v>versions_info() = {app_vsn, string()} | {supported | available, [ssl_tls_protocol()]} |
+	{supported_dtls | available_dtls, [dtls_protocol()]}	</v>
       </type>
       <desc>
 	<p>Returns version information relevant for the SSL
@@ -1314,19 +1421,35 @@ fun(srp, Username :: string(), UserState :: term()) ->
 	  <item>The application version of the SSL application.</item>
 
 	  <tag><c>supported</c></tag>
-	  <item>TLS/SSL versions supported by default.
+	  <item>SSL/TLS versions supported by default.
 	  Overridden by a version option on
 	  <seealso marker="#connect-2"> connect/[2,3,4]</seealso>,
 	  <seealso marker="#listen-2"> listen/2</seealso>, and <seealso
 	  marker="#ssl_accept-2">ssl_accept/[1,2,3]</seealso>.
-	  For the negotiated TLS/SSL version, see <seealso
+	  For the negotiated SSL/TLS version, see <seealso
 	  marker="#connection_information-1">ssl:connection_information/1
 	  </seealso>.</item>
-  
+	  
+	  <tag><c>supported_dtls</c></tag>
+	  <item>DTLS versions supported by default.
+	  Overridden by a version option on
+	  <seealso marker="#connect-2"> connect/[2,3,4]</seealso>,
+	  <seealso marker="#listen-2"> listen/2</seealso>, and <seealso
+	  marker="#ssl_accept-2">ssl_accept/[1,2,3]</seealso>.
+	  For the negotiated DTLS version, see <seealso
+	  marker="#connection_information-1">ssl:connection_information/1
+	  </seealso>.</item>
+
 	  <tag><c>available</c></tag>
-	  <item>All TLS/SSL versions supported by the SSL application.
+	  <item>All SSL/TLS versions supported by the SSL application.
 	  TLS 1.2 requires sufficient support from the Crypto
 	  application.</item>
+
+	  <tag><c>available_dtls</c></tag>
+	  <item>All DTLS versions supported by the SSL application.
+	  DTLS 1.2 requires sufficient support from the Crypto
+	  application.</item>
+	  
 	</taglist>
       </desc>
     </func>
@@ -1337,6 +1460,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
     <title>SEE ALSO</title>
     <p><seealso marker="kernel:inet">inet(3)</seealso> and
       <seealso marker="kernel:gen_tcp">gen_tcp(3)</seealso>
+      <seealso marker="kernel:gen_udp">gen_udp(3)</seealso>
     </p>
   </section>
 
diff --git a/lib/ssl/doc/src/ssl_app.xml b/lib/ssl/doc/src/ssl_app.xml
index f317dfded4..e22d43db0e 100644
--- a/lib/ssl/doc/src/ssl_app.xml
+++ b/lib/ssl/doc/src/ssl_app.xml
@@ -35,16 +35,21 @@
 
   <description>
     <p>
-      The ssl application is an implementation of the SSL/TLS protocol in Erlang.
+      The ssl application is an implementation of the SSL/TLS/DTLS protocol in Erlang.
     </p>
     <list type="bulleted">
-      <item>Supported SSL/TLS-versions are SSL-3.0, TLS-1.0,
-      TLS-1.1, and TLS-1.2.</item>
-      <item>For security reasons SSL-2.0 is not supported.</item>
+      <item>Supported SSL/TLS/DTLS-versions are SSL-3.0, TLS-1.0,
+      TLS-1.1, TLS-1.2, DTLS-1.0 (based on TLS-1.1), DTLS-1.2 (based on TLS-1.2)</item>
+      <item>For security reasons SSL-2.0 is not supported.
+      Interoperability with SSL-2.0 enabled clients dropped. (OTP 21) </item>
       <item>For security reasons SSL-3.0 is no longer supported by default,
-      but can be configured.</item>
+      but can be configured. (OTP 19) </item>
+      <item>For security reasons RSA key exchange cipher suites are no longer supported by default,
+      but can be configured. (OTP 21) </item>
       <item>For security reasons DES cipher suites are no longer supported by default,
-      but can be configured.</item>
+      but can be configured. (OTP 20) </item>
+    <item>For security reasons 3DES cipher suites are no longer supported by default,
+    but can be configured. (OTP 21) </item>
       <item> Renegotiation Indication Extension <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url> is supported
       </item>
       <item>Ephemeral Diffie-Hellman cipher suites are supported,
@@ -72,7 +77,7 @@
 
   <section>
     <title>DEPENDENCIES</title>
-    <p>The SSL application uses the <c>public_key</c> and
+    <p>The SSL application uses the <c>public_key</c>, <c>asn1</c> and
     Crypto application to handle public keys and encryption, hence
     these applications must be loaded for the SSL application to work. 
     In an embedded environment this means they must be started with
@@ -94,13 +99,20 @@
     <p><c>erl -ssl protocol_version "['tlsv1.2', 'tlsv1.1']"</c></p>
 
     <taglist>
-      <tag><c>protocol_version = </c><seealso marker="ssl#type-protocol">ssl:protocol()</seealso><c><![CDATA[<optional>]]></c></tag>
+      <tag><c>protocol_version = </c><seealso marker="ssl#type-protocol">ssl:ssl_tls_protocol()</seealso><c><![CDATA[<optional>]]></c></tag>
       <item><p>Protocol supported by started clients and
       servers. If this option is not set, it defaults to all
-      protocols currently supported by the SSL application.
+      TLS protocols currently supported by the SSL application.
       This option can be overridden by the version option
       to <c>ssl:connect/[2,3]</c> and <c>ssl:listen/2</c>.</p></item>
 
+      <tag><c>dtls_protocol_version = </c><seealso marker="ssl#type-protocol">ssl:dtls_protocol()</seealso><c><![CDATA[<optional>]]></c></tag>
+      <item><p>Protocol supported by started clients and
+      servers. If this option is not set, it defaults to all
+      DTLS protocols currently supported by the SSL application.
+      This option can be overridden by the version option
+      to <c>ssl:connect/[2,3]</c> and <c>ssl:listen/2</c>.</p></item>
+      
       <tag><c><![CDATA[session_lifetime = integer() <optional>]]></c></tag>
       <item><p>Maximum lifetime of the session data in seconds. Defaults to 24 hours which is the maximum
       recommended lifetime by <url href="http://www.ietf.org/rfc/5246rfc.txt">RFC 5246</url>. However
@@ -123,14 +135,14 @@
       new client connections.  If the maximum number of sessions is
       reached, the current cache entries will be invalidated
       regardless of their remaining lifetime. Defaults to
-      1000.</p></item>
+      1000. Recommended ssl-8.2.1 or later for this option to work as intended.</p></item>
 
       <tag> <c><![CDATA[session_cache_server_max = integer() <optional>]]></c></tag>
       <item><p>Limits the growth of the servers session cache, that is
       how many client sessions are cached by the server. If the
       maximum number of sessions is reached, the current cache entries
       will be invalidated regardless of their remaining
-      lifetime. Defaults to 1000.</p></item>
+      lifetime. Defaults to 1000. Recommended ssl-8.2.1 or later for this option to work as intended.</p></item>
       
       <tag><c><![CDATA[ssl_pem_cache_clean = integer() <optional>]]></c></tag>
       <item>
@@ -145,9 +157,8 @@
       <tag><c><![CDATA[bypass_pem_cache = boolean() <optional>]]></c></tag>
       <item>
 	<p>Introduced in ssl-8.0.2. Disables the PEM-cache.
-	The PEM cache has proven to be a bottleneck, until the
-	implementation has been improved this can be used as
-	a workaround. Defaults to false.
+	Can be used as a workaround for the PEM-cache bottleneck
+	before ssl-8.1.1. Defaults to false.
 	</p>
       </item>
       
@@ -167,7 +178,7 @@
     <title>ERROR LOGGER AND EVENT HANDLERS</title>
     <p>The SSL application uses the default <seealso
     marker="kernel:error_logger">OTP error logger</seealso> to log
-    unexpected errors and TLS alerts. The logging of TLS alerts may be
+    unexpected errors and TLS/DTLS alerts. The logging of TLS/DTLS alerts may be
     turned off with the <c>log_alert</c> option. </p>
   </section>
 
diff --git a/lib/ssl/doc/src/ssl_crl_cache.xml b/lib/ssl/doc/src/ssl_crl_cache.xml
index 7a67de3971..738487759a 100644
--- a/lib/ssl/doc/src/ssl_crl_cache.xml
+++ b/lib/ssl/doc/src/ssl_crl_cache.xml
@@ -40,7 +40,7 @@
 	<name>delete(Entries) -> ok |  {error, Reason} </name>
 	<fsummary> </fsummary>
 	<type>
-	  <v> Entries =  <seealso marker="inets:http_uri">http_uri:uri() </seealso> | {file, string()} | {der, [<seealso
+	  <v> Entries =  <seealso marker="stdlib:uri_string">uri_string:uri_string()</seealso> | {file, string()} | {der, [<seealso
 	  marker="public_key:public_key"> public_key:der_encoded() </seealso>]}</v>
 	  <v> Reason = term()</v>
 	</type>
@@ -55,7 +55,7 @@
 	<type>
 	  <v> CRLSrc = {file, string()} | {der, [ <seealso
 	marker="public_key:public_key"> public_key:der_encoded() </seealso> ]}</v>
-	  <v> URI = <seealso marker="inets:http_uri">http_uri:uri() </seealso> </v>
+	  <v> URI = <seealso marker="stdlib:uri_string">uri_string:uri_string() </seealso> </v>
 	  <v> Reason = term()</v>
 	</type>
 	<desc>
@@ -63,4 +63,4 @@
 	</desc>
       </func>
     </funcs>
-</erlref>
\ No newline at end of file
+</erlref>
diff --git a/lib/ssl/doc/src/ssl_distribution.xml b/lib/ssl/doc/src/ssl_distribution.xml
index 61f88e3860..e14f3f90dc 100644
--- a/lib/ssl/doc/src/ssl_distribution.xml
+++ b/lib/ssl/doc/src/ssl_distribution.xml
@@ -4,7 +4,7 @@
 <chapter>
   <header>
     <copyright>
-      <year>2000</year><year>2016</year>
+      <year>2000</year><year>2017</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -22,7 +22,7 @@
     
     </legalnotice>
 
-    <title>Using SSL for Erlang Distribution</title>
+    <title>Using TLS for Erlang Distribution</title>
     <prepared>P Nyblom</prepared>
     <responsible></responsible>
     <docno></docno>
@@ -33,7 +33,7 @@
     <file>ssl_distribution.xml</file>
   </header>
   <p>This section describes how the Erlang distribution can use 
-    SSL to get extra verification and security.</p>
+    TLS to get extra verification and security.</p>
 
     <p>The Erlang distribution can in theory use almost any 
       connection-based protocol as bearer. However, a module that 
@@ -45,16 +45,16 @@
 
       <p>In the SSL application, an extra distribution
       module, <c>inet_tls_dist</c>, can be used as an
-      alternative. All distribution connections will use SSL and
+      alternative. All distribution connections will use TLS and
       all participating Erlang nodes in a distributed system must use
       this distribution module.</p>
 
       <p>The security level depends on the parameters provided to the
-      SSL connection setup. Erlang node cookies are however always
+      TLS connection setup. Erlang node cookies are however always
       used, as they can be used to differentiate between two different
       Erlang networks.</p>
 
-    <p>To set up Erlang distribution over SSL:</p>
+    <p>To set up Erlang distribution over TLS:</p>
 
       <list type="bulleted">
       <item><em>Step 1:</em> Build boot scripts including the
@@ -63,13 +63,13 @@
       <c>net_kernel</c>.</item>
       <item><em>Step 3:</em> Specify the security options and other 
       SSL options.</item>
-      <item><em>Step 4:</em> Set up the environment to always use SSL.</item>
+      <item><em>Step 4:</em> Set up the environment to always use TLS.</item>
     </list>
 
     <p>The following sections describe these steps.</p>
 
   <section>
-    <title>Building Boot Scripts Including the ssl Application</title>
+    <title>Building Boot Scripts Including the SSL Application</title>
     <p>Boot scripts are built using the <c>systools</c> utility in the
       SASL application. For more information on <c>systools</c>,
       see the SASL documentation. This is only an example of
@@ -90,7 +90,7 @@
 	STDLIB application.</p></item>
       </list>
 
-    <p>The following shows an example <c>.rel</c> file with SSL 
+    <p>The following shows an example <c>.rel</c> file with TLS 
     added:</p>
     <code type="none">
       {release, {"OTP  APN 181 01","R15A"}, {erts, "5.9"},
@@ -154,7 +154,7 @@ Eshell V5.0  (abort with ^G)
 
   <section>
     <title>Specifying Distribution Module for net_kernel</title>
-    <p>The distribution module for SSL is named <c>inet_tls_dist</c>
+    <p>The distribution module for SSL/TLS is named <c>inet_tls_dist</c>
       and is specified on the command line with option <c>-proto_dist</c>.
       The argument to <c>-proto_dist</c> is to be the module
       name without suffix <c>_dist</c>. So, this distribution
@@ -174,21 +174,107 @@ Eshell V5.0  (abort with ^G)
 (ssl_test@myhost)1>     </code>
 
     <p>However, a node started in this way refuses to talk
-      to other nodes, as no SSL parameters are supplied
+      to other nodes, as no TLS parameters are supplied
       (see the next section).</p>
   </section>
 
   <section>
-    <title>Specifying SSL Options</title>
-    <p>For SSL to work, at least
-    a public key and a certificate must be specified for the server
-    side. In the following example, the PEM-files consist of two
-    entries, the server certificate and its private key.</p>
+    <title>Specifying SSL/TLS Options</title>
+
+    <p>
+      The SSL/TLS distribution options can be written into a file
+      that is consulted when the node is started.  This file name
+      is then specified with the command line argument
+      <c>-ssl_dist_optfile</c>.
+    </p>
+    <p>
+      Any available SSL/TLS option can be specified in an options file,
+      but note that options that take a <c>fun()</c> has to use
+      the syntax <c>fun Mod:Func/Arity</c> since a function
+      body can not be compiled when consulting a file.
+    </p>
+    <p>
+      Do not tamper with the socket options
+      <c>list</c>, <c>binary</c>, <c>active</c>, <c>packet</c>,
+      <c>nodelay</c> and <c>deliver</c> since they are used
+      by the distribution protocol handler itself.
+      Other raw socket options such as <c>packet_size</c> may
+      interfere severely, so beware!
+    </p>
+    <p>
+      For SSL/TLS to work, at least a public key and a certificate
+      must be specified for the server side.
+      In the following example, the PEM file
+      <c>"/home/me/ssl/erlserver.pem"</c> contains both
+      the server certificate and its private key.
+    </p>
+    <p>
+      Create a file named for example
+      <c>"/home/me/ssl/[email protected]"</c>:
+    </p>
+    <code type="none"><![CDATA[
+[{server,
+  [{certfile, "/home/me/ssl/erlserver.pem"},
+   {secure_renegotiate, true}]},
+ {client,
+  [{secure_renegotiate, true}]}].]]>
+    </code>
+    <p>
+      And then start the node like this
+      (line breaks in the command are for readability,
+      and shall not be there when typed):
+    </p>
+    <code type="none"><![CDATA[
+$ erl -boot /home/me/ssl/start_ssl -proto_dist inet_tls
+  -ssl_dist_optfile "/home/me/ssl/[email protected]"
+  -sname ssl_test]]>
+    </code>
+    <p>
+      The options in the <c>{server, Opts}</c> tuple are used
+      when calling <c>ssl:ssl_accept/3</c>, and the options in the
+      <c>{client, Opts}</c> tuple are used when calling
+      <c>ssl:connect/4</c>.
+    </p>
+    <p>
+      For the client, the option
+      <c>{server_name_indication, atom_to_list(TargetNode)}</c>
+      is added when connecting.
+      This makes it possible to use the client option
+      <c>{verify, verify_peer}</c>,
+      and the client will verify that the certificate matches
+      the node name you are connecting to.
+      This only works if the the server certificate is issued
+      to the name <c>atom_to_list(TargetNode)</c>.
+    </p>
+    <p>
+      For the server it is also possible to use the option
+      <c>{verify, verify_peer}</c> and the server will only accept
+      client connections with certificates that are trusted by
+      a root certificate that the server knows.
+      A client that presents an untrusted certificate will be rejected.
+      This option is preferably combined with
+      <c>{fail_if_no_peer_cert, true}</c> or a client will
+      still be accepted if it does not present any certificate.
+    </p>
+    <p>
+      A node started in this way is fully functional, using TLS
+      as the distribution protocol.
+    </p>
+  </section>
+
+  <section>
+    <title>Specifying SSL/TLS Options (Legacy)</title>
+
+    <p>
+      As in the previous section the PEM file
+      <c>"/home/me/ssl/erlserver.pem"</c> contains both
+      the server certificate and its private key.
+    </p>
 
     <p>On the <c>erl</c> command line you can specify options that the
-    SSL distribution adds when creating a socket.</p>
+    SSL/TLS distribution adds when creating a socket.</p>
 
-    <p>The simplest SSL options in the following list can be specified 
+    <p>The simplest SSL/TLS options in the following list can be specified 
     by adding the 
     prefix <c>server_</c> or <c>client_</c> to the option name:</p>
     <list type="bulleted">
@@ -208,7 +294,7 @@ Eshell V5.0  (abort with ^G)
     </list>
 
     <p>Note that <c>verify_fun</c> needs to be written in a different
-    form than the corresponding SSL option, since funs are not
+    form than the corresponding SSL/TLS option, since funs are not
     accepted on the command line.</p>
 
     <p>The server can also take the options <c>dhfile</c> and
@@ -221,32 +307,34 @@ Eshell V5.0  (abort with ^G)
     <p>Raw socket options, such as <c>packet</c> and <c>size</c> must not 
     be specified on the command line.</p>
 
-    <p>The command-line argument for specifying the SSL options is named
+    <p>The command-line argument for specifying the SSL/TLS options is named
     <c>-ssl_dist_opt</c> and is to be followed by pairs of
     SSL options and their values. Argument <c>-ssl_dist_opt</c> can
     be repeated any number of times.</p>
 
-      <p>An example command line can now look as follows
+    <p>
+      An example command line doing the same as the example
+      in the previous section can now look as follows
       (line breaks in the command are for readability, 
-      and are not be there when typed):</p>
-    <code type="none">
+      and shall not be there when typed):
+    </p>
+    <code type="none"><![CDATA[
 $ erl -boot /home/me/ssl/start_ssl -proto_dist inet_tls
-  -ssl_dist_opt server_certfile "/home/me/ssl/erlserver.pem" 
+  -ssl_dist_opt server_certfile "/home/me/ssl/erlserver.pem"
   -ssl_dist_opt server_secure_renegotiate true client_secure_renegotiate true
   -sname ssl_test
 Erlang (BEAM) emulator version 5.0 [source]
- 
+
 Eshell V5.0  (abort with ^G)
-(ssl_test@myhost)1>     </code>
-    <p>A node started in this way is fully functional, using SSL
-      as the distribution protocol.</p>
+(ssl_test@myhost)1>]]>
+    </code>
   </section>
 
   <section>
-    <title>Setting up Environment to Always Use SSL</title>
+    <title>Setting up Environment to Always Use SSL/TLS (Legacy)</title>
     <p>A convenient way to specify arguments to Erlang is to use environment 
       variable <c>ERL_FLAGS</c>. All the flags needed to
-      use the SSL distribution can be specified in that variable and are
+      use the SSL/TLS distribution can be specified in that variable and are
       then interpreted as command-line arguments for all
       subsequent invocations of Erlang.</p>
 
@@ -277,25 +365,21 @@ Eshell V5.0  (abort with ^G)
   </section>
 
   <section>
-    <title>Using SSL distribution over IPv6</title>
-    <p>It is possible to use SSL distribution over IPv6 instead of
+    <title>Using SSL/TLS distribution over IPv6</title>
+    <p>It is possible to use SSL/TLS distribution over IPv6 instead of
     IPv4. To do this, pass the option <c>-proto_dist inet6_tls</c>
     instead of <c>-proto_dist inet_tls</c> when starting Erlang,
     either on the command line or in the <c>ERL_FLAGS</c> environment
     variable.</p>
 
     <p>An example command line with this option would look like this:</p>
-    <code type="none">
+    <code type="none"><![CDATA[
 $ erl -boot /home/me/ssl/start_ssl -proto_dist inet6_tls
-  -ssl_dist_opt server_certfile "/home/me/ssl/erlserver.pem"
-  -ssl_dist_opt server_secure_renegotiate true client_secure_renegotiate true
-  -sname ssl_test
-Erlang (BEAM) emulator version 5.0 [source]
-
-Eshell V5.0  (abort with ^G)
-(ssl_test@myhost)1>     </code>
+  -ssl_dist_optfile "/home/me/ssl/[email protected]"
+  -sname ssl_test]]>
+    </code>
 
     <p>A node started in this way will only be able to communicate with
-    other nodes using SSL distribution over IPv6.</p>
+    other nodes using SSL/TLS distribution over IPv6.</p>
   </section>
 </chapter>
diff --git a/lib/ssl/doc/src/ssl_introduction.xml b/lib/ssl/doc/src/ssl_introduction.xml
index d3e39dbb01..a416924eb1 100644
--- a/lib/ssl/doc/src/ssl_introduction.xml
+++ b/lib/ssl/doc/src/ssl_introduction.xml
@@ -5,7 +5,7 @@
   <header>
     <copyright>
       <year>2015</year>
-      <year>2015</year>
+      <year>2017</year>
       <holder>Ericsson AB, All Rights Reserved</holder>
     </copyright>
     <legalnotice>
@@ -36,19 +36,20 @@
     <title>Purpose</title>
     <p>Transport Layer Security (TLS) and its predecessor, the Secure
     Sockets Layer (SSL), are cryptographic protocols designed to
-    provide communications security over a computer network. The protocols use
+    provide communications security over a computer network. The protocols
     use X.509 certificates and hence public key (asymmetric) cryptography to
     authenticate the counterpart with whom they communicate,
     and to exchange a symmetric key for payload encryption. The protocol provides
     data/message confidentiality (encryption), integrity (through message authentication code checks)
-    and host verification (through certificate path validation).</p>
+    and host verification (through certificate path validation). DTLS (Datagram Transport Layer Security) that
+    is based on TLS but datagram oriented instead of stream oriented.</p>
   </section>
 
   <section>
     <title>Prerequisites</title>
     <p>It is assumed that the reader is familiar with the Erlang
     programming language, the concepts of OTP, and has a basic
-    understanding of SSL/TLS.</p>
+    understanding of SSL/TLS/DTLS.</p>
   </section>
 
 </chapter>
diff --git a/lib/ssl/doc/src/ssl_protocol.xml b/lib/ssl/doc/src/ssl_protocol.xml
index 31a22db58b..0b12dc7dc5 100644
--- a/lib/ssl/doc/src/ssl_protocol.xml
+++ b/lib/ssl/doc/src/ssl_protocol.xml
@@ -22,7 +22,7 @@
       
     </legalnotice>
 
-    <title>TLS and its Predecessor, SSL</title>
+    <title>TLS/DTLS and TLS Predecessor, SSL</title>
     <prepared></prepared>
     <responsible></responsible>
     <docno></docno>
@@ -33,7 +33,7 @@
     <file>ssl_protocol.xml</file>
   </header>
   
-  <p>The Erlang SSL application implements the SSL/TLS protocol
+  <p>The Erlang SSL application implements the SSL/TLS/DTLS protocol
   for the currently supported versions,  see the
   <seealso marker="ssl">ssl(3)</seealso> manual page.
   </p>
@@ -41,20 +41,22 @@
   <p>By default SSL/TLS is run over the TCP/IP protocol even
   though you can plug in any other reliable transport protocol
   with the same Application Programming Interface (API) as the
-  <c>gen_tcp</c> module in Kernel.</p>
+  <c>gen_tcp</c> module in Kernel. DTLS is by default run over UDP/IP,
+  which means that application data has no delivery guarentees. Other 
+  transports, such as SCTP, may be supported in future releases.</p>
   
   <p>If a client and a server wants to use an upgrade mechanism, such as
-  defined by RFC 2817, to upgrade a regular TCP/IP connection to an SSL
+  defined by RFC 2817, to upgrade a regular TCP/IP connection to an TLS
   connection, this is supported by the Erlang SSL application API. This can be 
   useful for, for example, supporting HTTP and HTTPS on the same port and
-  implementing virtual hosting.
+  implementing virtual hosting. Note this is a TLS feature only.
   </p>
 
   <section>
     <title>Security Overview</title>
       
    <p>To achieve authentication and privacy, the client and server
-    perform a TLS handshake procedure before transmitting or receiving
+    perform a TLS/DTLS handshake procedure before transmitting or receiving
     any data. During the handshake, they agree on a protocol version and
     cryptographic algorithms, generate shared secrets using public
     key cryptographies, and optionally authenticate each other with
@@ -73,10 +75,10 @@
     
     <p>The keys for the symmetric encryption are generated uniquely
     for each connection and are based on a secret negotiated
-    in the TLS handshake.</p>
+    in the TLS/DTLS handshake.</p>
     
-    <p>The TLS handshake protocol and data transfer is run on top of
-    the TLS Record Protocol, which uses a keyed-hash Message
+    <p>The TLS/DTLS handshake protocol and data transfer is run on top of
+    the TLS/DTLS Record Protocol, which uses a keyed-hash Message
     Authenticity Code (MAC), or a Hash-based MAC (HMAC),
     to protect the message data
     integrity. From the TLS RFC: "A Message Authentication Code is a
@@ -152,8 +154,8 @@
      from it was saved, for security reasons. The amount of time the 
      session data is to be saved can be configured.</p>
 
-     <p>By default the SSL clients try to reuse an available session and 
-     by default the SSL servers agree to reuse sessions when clients
+     <p>By default the TLS/DTLS clients try to reuse an available session and 
+     by default the TLS/DTLS servers agree to reuse sessions when clients
      ask for it.</p>
 
    </section>
diff --git a/lib/ssl/doc/src/using_ssl.xml b/lib/ssl/doc/src/using_ssl.xml
index f84cd6e391..3ef33df719 100644
--- a/lib/ssl/doc/src/using_ssl.xml
+++ b/lib/ssl/doc/src/using_ssl.xml
@@ -22,7 +22,7 @@
     
     </legalnotice>
 
-    <title>Using SSL API</title>
+    <title>Using SSL application API</title>
     <prepared></prepared>
     <responsible></responsible>
     <docno></docno>
@@ -51,7 +51,7 @@
     <section>
       <title>Minimal Example</title>
       
-      <note><p> The minimal setup is not the most secure setup of SSL.</p>    
+      <note><p> The minimal setup is not the most secure setup of SSL/TLS/DTLS.</p>    
       </note>
 
       <p>To set up client/server connections:</p>
@@ -60,27 +60,27 @@
       <code type="erl">1 server> ssl:start().
 ok</code>
       
-      <p><em>Step 2:</em> Create an SSL listen socket:</p>
+      <p><em>Step 2:</em> Create an TLS listen socket: (To run DTLS add the option {protocol, dtls})</p>
       <code type="erl">2 server> {ok, ListenSocket} =
 ssl:listen(9999, [{certfile, "cert.pem"}, {keyfile, "key.pem"},{reuseaddr, true}]).
 {ok,{sslsocket, [...]}}</code>
       
-      <p><em>Step 3:</em> Do a transport accept on the SSL listen socket:</p>
+      <p><em>Step 3:</em> Do a transport accept on the TLS listen socket:</p>
       <code type="erl">3 server> {ok, Socket} = ssl:transport_accept(ListenSocket).
 {ok,{sslsocket, [...]}}</code>
 
-      <p><em>Step 4:</em> Start the client side:</p>
+      <p><em>Step 4:</em> Start the client side: </p>
       <code type="erl">1 client> ssl:start().
 ok</code>
-      
+      <p> To run DTLS add the option {protocol, dtls} to third argument.</p>
       <code type="erl">2 client> {ok, Socket} = ssl:connect("localhost", 9999,  [], infinity).
 {ok,{sslsocket, [...]}}</code>
       
-      <p><em>Step 5:</em> Do the SSL handshake:</p>
+      <p><em>Step 5:</em> Do the TLS handshake:</p>
       <code type="erl">4 server> ok = ssl:ssl_accept(Socket).
 ok</code>
       
-      <p><em>Step 6:</em> Send a message over SSL:</p>
+      <p><em>Step 6:</em> Send a message over TLS:</p>
       <code type="erl">5 server> ssl:send(Socket, "foo").
 ok</code>
       
@@ -92,7 +92,7 @@ ok</code>
     </section>
     
     <section>
-      <title>Upgrade Example</title>
+      <title>Upgrade Example - TLS only </title>
       
       <note><p>To upgrade a TCP/IP connection to an SSL connection, the
       client and server must agree to do so. The agreement
@@ -125,24 +125,24 @@ ok</code>
       <code type="erl">4 server> inet:setopts(Socket, [{active, false}]).
 ok</code>
       
-      <p><em>Step 6:</em> Do the SSL handshake:</p>
-      <code type="erl">5 server> {ok, SSLSocket} = ssl:ssl_accept(Socket, [{cacertfile, "cacerts.pem"},
+      <p><em>Step 6:</em> Do the TLS handshake:</p>
+      <code type="erl">5 server> {ok, TLSSocket} = ssl:ssl_accept(Socket, [{cacertfile, "cacerts.pem"},
 {certfile, "cert.pem"}, {keyfile, "key.pem"}]).
 {ok,{sslsocket,[...]}}</code>
       
-      <p><em>Step 7:</em> Upgrade to an SSL connection. The client and server
+      <p><em>Step 7:</em> Upgrade to an TLS connection. The client and server
       must agree upon the upgrade. The server must call
       <c>ssl:accept/2</c> before the client calls <c>ssl:connect/3.</c></p>
-      <code type="erl">3 client>{ok, SSLSocket} = ssl:connect(Socket, [{cacertfile, "cacerts.pem"},
+      <code type="erl">3 client>{ok, TLSSocket} = ssl:connect(Socket, [{cacertfile, "cacerts.pem"},
 {certfile, "cert.pem"}, {keyfile, "key.pem"}], infinity).
 {ok,{sslsocket,[...]}}</code>
       
-      <p><em>Step 8:</em> Send a message over SSL:</p>
-      <code type="erl">4 client> ssl:send(SSLSocket, "foo").
+      <p><em>Step 8:</em> Send a message over TLS:</p>
+      <code type="erl">4 client> ssl:send(TLSSocket, "foo").
 ok</code>
       
-      <p><em>Step 9:</em> Set <c>active true</c> on the SSL socket:</p>
-      <code type="erl">4 server> ssl:setopts(SSLSocket, [{active, true}]).
+      <p><em>Step 9:</em> Set <c>active true</c> on the TLS socket:</p>
+      <code type="erl">4 server> ssl:setopts(TLSSocket, [{active, true}]).
 ok</code>
       
       <p><em>Step 10:</em> Flush the shell message queue to see that the message
@@ -152,4 +152,85 @@ Shell got {ssl,{sslsocket,[...]},"foo"}
 ok</code>
     </section>
   </section>
+
+  <section>
+    <title>Customizing cipher suits</title>
+
+    <p>Fetch default cipher suite list for an TLS/DTLS version. Change default
+    to all to get all possible cipher suites.</p>
+    <code type="erl">1>  Default = ssl:cipher_suites(default, 'tlsv1.2').
+    [#{cipher => aes_256_gcm,key_exchange => ecdhe_ecdsa,
+    mac => aead,prf => sha384}, ....]
+</code>
+
+    <p>In OTP 20 it is desirable to remove all cipher suites
+    that uses rsa kexchange (removed from default in 21) </p>
+    <code type="erl">2> NoRSA =
+    ssl:filter_cipher_suites(Default,
+                            [{key_exchange, fun(rsa) -> false;
+			                       (_) -> true end}]).
+    [...]
+    </code>
+
+    <p> Pick just a few suites </p>
+    <code type="erl"> 3> Suites =
+    ssl:filter_cipher_suites(Default,
+                            [{key_exchange, fun(ecdh_ecdsa) -> true;
+			                       (_) -> false end},
+                             {cipher, fun(aes_128_cbc) ->true;
+			                  (_) ->false end}]).
+    [#{cipher => aes_128_cbc,key_exchange => ecdh_ecdsa,
+     mac => sha256,prf => sha256},
+     #{cipher => aes_128_cbc,key_exchange => ecdh_ecdsa,mac => sha,
+     prf => default_prf}]
+    </code>
+    
+    <p> Make some particular suites the most preferred, or least
+    preferred by changing prepend to append.</p>
+    <code type="erl"> 4>ssl:prepend_cipher_suites(Suites, Default).
+  [#{cipher => aes_128_cbc,key_exchange => ecdh_ecdsa,
+     mac => sha256,prf => sha256},
+   #{cipher => aes_128_cbc,key_exchange => ecdh_ecdsa,mac => sha,
+     prf => default_prf},
+   #{cipher => aes_256_cbc,key_exchange => ecdhe_ecdsa,
+     mac => sha384,prf => sha384}, ...]
+    </code>
+  </section>      
+
+  <section>
+    <title>Using an Engine Stored Key</title>
+    
+    <p>Erlang ssl application is able to use private keys provided
+    by OpenSSL engines using the following mechanism:</p>
+    
+    <code type="erl">1> ssl:start().
+ok</code>
+
+    <p>Load a crypto engine, should be done once per engine used. For example
+    dynamically load the engine called <c>MyEngine</c>:
+    </p>
+    <code type="erl">2> {ok, EngineRef} =
+crypto:engine_load(&lt;&lt;"dynamic">>,
+                   [{&lt;&lt;"SO_PATH">>, "/tmp/user/engines/MyEngine"},&lt;&lt;"LOAD">>],[]).
+{ok,#Ref&lt;0.2399045421.3028942852.173962>}
+    </code>
+    
+    <p>Create a map with the engine information and the algorithm used by the engine:</p>
+    <code type="erl">3> PrivKey =
+ #{algorithm => rsa,
+   engine => EngineRef,
+   key_id => "id of the private key in Engine"}.
+    </code>
+    <p>Use the map in the ssl key option:</p>
+    <code type="erl">4> {ok, SSLSocket} =
+ssl:connect("localhost", 9999,
+            [{cacertfile, "cacerts.pem"},
+             {certfile, "cert.pem"},
+             {key, PrivKey}], infinity).
+    </code>
+
+    <p>See also <seealso marker="crypto:engine_load#engine_load"> crypto documentation</seealso> </p>
+    
+     </section>      
+  
  </chapter>
diff --git a/lib/ssl/src/Makefile b/lib/ssl/src/Makefile
index 8eba5cf347..11b3e65912 100644
--- a/lib/ssl/src/Makefile
+++ b/lib/ssl/src/Makefile
@@ -84,7 +84,6 @@ MODULES= \
 	tls_record \
 	dtls_record \
 	ssl_record \
-	ssl_v2 \
 	ssl_v3 \
 	tls_v1 \
 	dtls_v1
diff --git a/lib/ssl/src/dtls_connection.erl b/lib/ssl/src/dtls_connection.erl
index 387d632ef8..7bc7fc3fc6 100644
--- a/lib/ssl/src/dtls_connection.erl
+++ b/lib/ssl/src/dtls_connection.erl
@@ -39,20 +39,18 @@
 -export([start_fsm/8, start_link/7, init/1]).
 
 %% State transition handling	 
--export([next_record/1, next_event/3, next_event/4]).
+-export([next_record/1, next_event/3, next_event/4,  handle_common_event/4]).
 
 %% Handshake handling
--export([renegotiate/2, 
-	 reinit_handshake_data/1, 
-	 send_handshake/2, queue_handshake/2, queue_change_cipher/2,
-	 select_sni_extension/1, empty_connection_state/2]).
+-export([renegotiate/2, send_handshake/2, 
+         queue_handshake/2, queue_change_cipher/2,
+         reinit_handshake_data/1, select_sni_extension/1, empty_connection_state/2]).
 
 %% Alert and close handling
 -export([encode_alert/3,send_alert/2, close/5, protocol_name/0]).
 
 %% Data handling
-
--export([encode_data/3, passive_receive/2,  next_record_if_active/1, handle_common_event/4,
+-export([encode_data/3, passive_receive/2, next_record_if_active/1,
 	 send/3, socket/5, setopts/3, getopts/3]).
 
 %% gen_statem state functions
@@ -64,6 +62,9 @@
 
 %%====================================================================
 %% Internal application API
+%%====================================================================	
+%%====================================================================
+%% Setup
 %%====================================================================	     
 start_fsm(Role, Host, Port, Socket, {#ssl_options{erl_dist = false},_, Tracker} = Opts,
 	  User, {CbModule, _,_, _} = CbInfo, 
@@ -79,6 +80,224 @@ start_fsm(Role, Host, Port, Socket, {#ssl_options{erl_dist = false},_, Tracker}
 	    Error
     end.
 
+%%--------------------------------------------------------------------
+-spec start_link(atom(), host(), inet:port_number(), port(), list(), pid(), tuple()) ->
+			{ok, pid()} | ignore |  {error, reason()}.
+%%
+%% Description: Creates a gen_statem process which calls Module:init/1 to
+%% initialize.
+%%--------------------------------------------------------------------
+start_link(Role, Host, Port, Socket, Options, User, CbInfo) ->
+    {ok, proc_lib:spawn_link(?MODULE, init, [[Role, Host, Port, Socket, Options, User, CbInfo]])}.
+
+init([Role, Host, Port, Socket, Options,  User, CbInfo]) ->
+    process_flag(trap_exit, true),
+    State0 =  initial_state(Role, Host, Port, Socket, Options, User, CbInfo),
+    try
+	State = ssl_connection:ssl_config(State0#state.ssl_options, Role, State0),
+	gen_statem:enter_loop(?MODULE, [], init, State)
+    catch
+	throw:Error ->
+	    gen_statem:enter_loop(?MODULE, [], error, {Error,State0})
+    end.
+%%====================================================================
+%% State transition handling
+%%====================================================================	     
+next_record(#state{unprocessed_handshake_events = N} = State) when N > 0 ->
+    {no_record, State#state{unprocessed_handshake_events = N-1}};
+					 
+next_record(#state{protocol_buffers =
+		       #protocol_buffers{dtls_cipher_texts = [#ssl_tls{epoch = Epoch} = CT | Rest]}
+		   = Buffers,
+		   connection_states = #{current_read := #{epoch := Epoch}} = ConnectionStates} = State) ->
+    CurrentRead = dtls_record:get_connection_state_by_epoch(Epoch, ConnectionStates, read),
+    case dtls_record:replay_detect(CT, CurrentRead) of
+        false ->
+            decode_cipher_text(State#state{connection_states = ConnectionStates}) ;
+        true ->
+            %% Ignore replayed record
+            next_record(State#state{protocol_buffers =
+                                        Buffers#protocol_buffers{dtls_cipher_texts = Rest},
+                                    connection_states = ConnectionStates})
+    end;
+next_record(#state{protocol_buffers =
+		       #protocol_buffers{dtls_cipher_texts = [#ssl_tls{epoch = Epoch} | Rest]}
+		   = Buffers,
+		   connection_states = #{current_read := #{epoch := CurrentEpoch}} = ConnectionStates} = State) 
+  when Epoch > CurrentEpoch ->
+    %% TODO Buffer later Epoch message, drop it for now
+    next_record(State#state{protocol_buffers =
+                                Buffers#protocol_buffers{dtls_cipher_texts = Rest},
+                            connection_states = ConnectionStates});
+next_record(#state{protocol_buffers =
+		       #protocol_buffers{dtls_cipher_texts = [ _ | Rest]}
+		   = Buffers,
+		   connection_states = ConnectionStates} = State) ->
+    %% Drop old epoch message
+    next_record(State#state{protocol_buffers =
+                                Buffers#protocol_buffers{dtls_cipher_texts = Rest},
+                            connection_states = ConnectionStates});
+next_record(#state{role = server,
+		   socket = {Listener, {Client, _}},
+		   transport_cb = gen_udp} = State) -> 
+    dtls_udp_listener:active_once(Listener, Client, self()),
+    {no_record, State};
+next_record(#state{role = client,
+		   socket = {_Server, Socket} = DTLSSocket,
+                   close_tag = CloseTag,
+		   transport_cb = Transport} = State) -> 
+    case dtls_socket:setopts(Transport, Socket, [{active,once}]) of
+        ok ->
+ 	    {no_record, State};
+ 	_ ->
+            self() ! {CloseTag, DTLSSocket},
+	    {no_record, State}
+    end;
+next_record(State) ->
+    {no_record, State}.
+
+next_event(StateName, Record, State) ->
+    next_event(StateName, Record, State, []).
+
+next_event(connection = StateName, no_record,
+	   #state{connection_states = #{current_read := #{epoch := CurrentEpoch}}} = State0, Actions) ->
+    case next_record_if_active(State0) of
+	{no_record, State} ->
+            ssl_connection:hibernate_after(StateName, State, Actions);
+        {#ssl_tls{epoch = CurrentEpoch,
+                  type = ?HANDSHAKE,
+                  version = Version} = Record, State1} ->
+            State = dtls_version(StateName, Version, State1), 
+	    {next_state, StateName, State,
+	     [{next_event, internal, {protocol_record, Record}} | Actions]};
+        {#ssl_tls{epoch = CurrentEpoch} = Record, State} ->
+	    {next_state, StateName, State, [{next_event, internal, {protocol_record, Record}} | Actions]};
+	{#ssl_tls{epoch = Epoch,
+		  type = ?HANDSHAKE,
+		  version = _Version}, State1} = _Record when Epoch == CurrentEpoch-1 ->
+	    {State2, MoreActions} = send_handshake_flight(State1, CurrentEpoch),
+            {NextRecord, State} = next_record(State2),
+            next_event(StateName, NextRecord, State, Actions ++ MoreActions);
+        %% From FLIGHT perspective CHANGE_CIPHER_SPEC is treated as a handshake
+        {#ssl_tls{epoch = Epoch,
+		  type = ?CHANGE_CIPHER_SPEC,
+		  version = _Version}, State1} = _Record when Epoch == CurrentEpoch-1 ->
+	    {State2, MoreActions} = send_handshake_flight(State1, CurrentEpoch),
+	    {NextRecord, State} = next_record(State2),
+            next_event(StateName, NextRecord, State, Actions ++ MoreActions);
+	{#ssl_tls{epoch = _Epoch,
+		  version = _Version}, State1} ->
+	    %% TODO maybe buffer later epoch
+            {Record, State} = next_record(State1),
+            next_event(StateName, Record, State, Actions); 
+	{#alert{} = Alert, State} ->
+	    {next_state, StateName, State, [{next_event, internal, Alert} | Actions]}
+    end;
+next_event(connection = StateName, Record,
+	   #state{connection_states = #{current_read := #{epoch := CurrentEpoch}}} = State0, Actions) ->
+    case Record of
+        #ssl_tls{epoch = CurrentEpoch,
+                 type = ?HANDSHAKE,
+                 version = Version} = Record ->
+            State = dtls_version(StateName, Version, State0), 
+	    {next_state, StateName, State,
+	     [{next_event, internal, {protocol_record, Record}} | Actions]};
+	#ssl_tls{epoch = CurrentEpoch} ->
+	    {next_state, StateName, State0, [{next_event, internal, {protocol_record, Record}} | Actions]};
+	#ssl_tls{epoch = Epoch,
+                 type = ?HANDSHAKE,
+                 version = _Version} when Epoch == CurrentEpoch-1 ->
+	    {State1, MoreActions} = send_handshake_flight(State0, CurrentEpoch),
+            {NextRecord, State} = next_record(State1),
+            next_event(StateName, NextRecord, State, Actions ++ MoreActions);
+        %% From FLIGHT perspective CHANGE_CIPHER_SPEC is treated as a handshake
+        #ssl_tls{epoch = Epoch,
+                 type = ?CHANGE_CIPHER_SPEC,
+                 version = _Version} when Epoch == CurrentEpoch-1 ->
+	    {State1, MoreActions} = send_handshake_flight(State0, CurrentEpoch),
+            {NextRecord, State} = next_record(State1),
+            next_event(StateName, NextRecord, State, Actions ++ MoreActions); 
+        _ -> 
+            next_event(StateName, no_record, State0, Actions) 
+    end;
+next_event(StateName, Record, 
+	   #state{connection_states = #{current_read := #{epoch := CurrentEpoch}}} = State0, Actions) ->
+    case Record of
+	no_record ->
+            {next_state, StateName, State0, Actions};
+        #ssl_tls{epoch = CurrentEpoch,
+                 version = Version} = Record ->
+            State = dtls_version(StateName, Version, State0),
+            {next_state, StateName, State, 
+             [{next_event, internal, {protocol_record, Record}} | Actions]};
+	#ssl_tls{epoch = _Epoch,
+		 version = _Version} = _Record ->
+	    %% TODO maybe buffer later epoch
+            {Record, State} = next_record(State0),
+            next_event(StateName, Record, State, Actions); 
+	#alert{} = Alert ->
+	    {next_state, StateName, State0, [{next_event, internal, Alert} | Actions]}
+    end.
+
+handle_common_event(internal, #alert{} = Alert, StateName, 
+		    #state{negotiated_version = Version} = State) ->
+    handle_own_alert(Alert, Version, StateName, State);
+%%% DTLS record protocol level handshake messages 
+handle_common_event(internal, #ssl_tls{type = ?HANDSHAKE,
+				       fragment = Data}, 
+		    StateName, 
+		    #state{protocol_buffers = Buffers0,
+			   negotiated_version = Version} = State0) ->
+    try
+	case dtls_handshake:get_dtls_handshake(Version, Data, Buffers0) of
+	    {[], Buffers} ->
+		{Record, State} = next_record(State0#state{protocol_buffers = Buffers}),
+		next_event(StateName, Record, State);
+	    {Packets, Buffers} ->
+		State = State0#state{protocol_buffers = Buffers},
+		Events = dtls_handshake_events(Packets),
+                {next_state, StateName, 
+                 State#state{unprocessed_handshake_events = unprocessed_events(Events)}, Events}
+	end
+    catch throw:#alert{} = Alert ->
+	    handle_own_alert(Alert, Version, StateName, State0)
+    end;
+%%% DTLS record protocol level application data messages 
+handle_common_event(internal, #ssl_tls{type = ?APPLICATION_DATA, fragment = Data}, StateName, State) ->
+    {next_state, StateName, State, [{next_event, internal, {application_data, Data}}]};
+%%% DTLS record protocol level change cipher messages
+handle_common_event(internal, #ssl_tls{type = ?CHANGE_CIPHER_SPEC, fragment = Data}, StateName, State) ->
+    {next_state, StateName, State, [{next_event, internal, #change_cipher_spec{type = Data}}]};
+%%% DTLS record protocol level Alert messages
+handle_common_event(internal, #ssl_tls{type = ?ALERT, fragment = EncAlerts}, StateName,
+		    #state{negotiated_version = Version} = State) ->
+    case decode_alerts(EncAlerts) of
+	Alerts = [_|_] ->
+	    handle_alerts(Alerts,  {next_state, StateName, State});
+	#alert{} = Alert ->
+	    handle_own_alert(Alert, Version, StateName, State)
+    end;
+%% Ignore unknown TLS record level protocol messages
+handle_common_event(internal, #ssl_tls{type = _Unknown}, StateName, State) ->
+    {next_state, StateName, State}.
+
+%%====================================================================
+%% Handshake handling
+%%====================================================================	     
+
+renegotiate(#state{role = client} = State, Actions) ->
+    %% Handle same way as if server requested
+    %% the renegotiation
+    {next_state, connection, State,
+     [{next_event, internal, #hello_request{}} | Actions]};
+
+renegotiate(#state{role = server} = State0, Actions) ->
+    HelloRequest = ssl_handshake:hello_request(),
+    State1 = prepare_flight(State0),
+    {State2, MoreActions} = send_handshake(HelloRequest, State1),
+    {Record, State} = next_record(State2),
+    next_event(hello, Record, State, Actions ++ MoreActions).
+
 send_handshake(Handshake, #state{connection_states = ConnectionStates} = State) ->
     #{epoch := Epoch} = ssl_record:current_connection_state(ConnectionStates, write),
     send_handshake_flight(queue_handshake(Handshake, State), Epoch).
@@ -104,85 +323,12 @@ queue_handshake(Handshake0, #state{tls_handshake_history = Hist0,
 					 next_sequence => Seq +1},
 		tls_handshake_history = Hist}.
 
-
-send_handshake_flight(#state{socket = Socket,
-			     transport_cb = Transport,
-			     flight_buffer = #{handshakes := Flight,
-					       change_cipher_spec := undefined},
-			     negotiated_version = Version,
-			     connection_states = ConnectionStates0} = State0, Epoch) ->
-    %% TODO remove hardcoded Max size
-    {Encoded, ConnectionStates} =
-	encode_handshake_flight(lists:reverse(Flight), Version, 1400, Epoch, ConnectionStates0),
-    send(Transport, Socket, Encoded), 
-   {State0#state{connection_states = ConnectionStates}, []};
-
-send_handshake_flight(#state{socket = Socket,
-			     transport_cb = Transport,
-			     flight_buffer = #{handshakes := [_|_] = Flight0,
-					       change_cipher_spec := ChangeCipher,
-					       handshakes_after_change_cipher_spec := []},
-			     negotiated_version = Version,
-			     connection_states = ConnectionStates0} = State0, Epoch) ->      
-    {HsBefore, ConnectionStates1} =
-	encode_handshake_flight(lists:reverse(Flight0), Version, 1400, Epoch, ConnectionStates0),
-    {EncChangeCipher, ConnectionStates} = encode_change_cipher(ChangeCipher, Version, Epoch, ConnectionStates1),
-
-    send(Transport, Socket, [HsBefore, EncChangeCipher]),
-    {State0#state{connection_states = ConnectionStates}, []};
-
-send_handshake_flight(#state{socket = Socket,
-			     transport_cb = Transport,
-			     flight_buffer = #{handshakes := [_|_] = Flight0,
-					       change_cipher_spec := ChangeCipher,
-					       handshakes_after_change_cipher_spec := Flight1},
-			     negotiated_version = Version,
-			     connection_states = ConnectionStates0} = State0, Epoch) ->      
-    {HsBefore, ConnectionStates1} =
-	encode_handshake_flight(lists:reverse(Flight0), Version, 1400, Epoch-1, ConnectionStates0),
-    {EncChangeCipher, ConnectionStates2} = 
-	encode_change_cipher(ChangeCipher, Version, Epoch-1, ConnectionStates1),
-    {HsAfter, ConnectionStates} =
-	encode_handshake_flight(lists:reverse(Flight1), Version, 1400, Epoch, ConnectionStates2),
-    send(Transport, Socket, [HsBefore, EncChangeCipher, HsAfter]),
-    {State0#state{connection_states = ConnectionStates}, []};
-
-send_handshake_flight(#state{socket = Socket,
-			     transport_cb = Transport,
-			     flight_buffer = #{handshakes := [],
-					       change_cipher_spec := ChangeCipher,
-					       handshakes_after_change_cipher_spec := Flight1},
-			     negotiated_version = Version,
-			     connection_states = ConnectionStates0} = State0, Epoch) ->
-    {EncChangeCipher, ConnectionStates1} = 
-	encode_change_cipher(ChangeCipher, Version, Epoch-1, ConnectionStates0),
-    {HsAfter, ConnectionStates} =
-	encode_handshake_flight(lists:reverse(Flight1), Version, 1400, Epoch, ConnectionStates1),
-    send(Transport, Socket, [EncChangeCipher, HsAfter]),
-    {State0#state{connection_states = ConnectionStates}, []}.
-
 queue_change_cipher(ChangeCipher, #state{flight_buffer = Flight,
 					 connection_states = ConnectionStates0} = State) -> 
     ConnectionStates = 
 	dtls_record:next_epoch(ConnectionStates0, write), 
     State#state{flight_buffer = Flight#{change_cipher_spec => ChangeCipher},
 		connection_states = ConnectionStates}.
-
-send_alert(Alert, #state{negotiated_version = Version,
-			 socket = Socket,
-			 transport_cb = Transport,
-			 connection_states = ConnectionStates0} = State0) ->
-    {BinMsg, ConnectionStates} =
-	encode_alert(Alert, Version, ConnectionStates0),
-    send(Transport, Socket, BinMsg),
-    State0#state{connection_states = ConnectionStates}.
-
-close(downgrade, _,_,_,_) ->
-    ok;
-%% Other
-close(_, Socket, Transport, _,_) ->
-    dtls_socket:close(Transport,Socket).
-
 reinit_handshake_data(#state{protocol_buffers = Buffers} = State) ->
     State#state{premaster_secret = undefined,
 		public_key_info = undefined,
@@ -200,54 +346,81 @@ select_sni_extension(#client_hello{extensions = HelloExtensions}) ->
     HelloExtensions#hello_extensions.sni;
 select_sni_extension(_) ->
     undefined.
+
 empty_connection_state(ConnectionEnd, BeastMitigation) ->
     Empty = ssl_record:empty_connection_state(ConnectionEnd, BeastMitigation),
     dtls_record:empty_connection_state(Empty).
 
-socket(Pid,  Transport, Socket, Connection, _) ->
-    dtls_socket:socket(Pid, Transport, Socket, Connection).
+%%====================================================================
+%% Alert and close handling
+%%====================================================================	     
+encode_alert(#alert{} = Alert, Version, ConnectionStates) ->
+    dtls_record:encode_alert_record(Alert, Version, ConnectionStates).
 
-setopts(Transport, Socket, Other) ->
-    dtls_socket:setopts(Transport, Socket, Other).
-getopts(Transport, Socket, Tag) ->
-    dtls_socket:getopts(Transport, Socket, Tag).
+send_alert(Alert, #state{negotiated_version = Version,
+			 socket = Socket,
+			 transport_cb = Transport,
+			 connection_states = ConnectionStates0} = State0) ->
+    {BinMsg, ConnectionStates} =
+	encode_alert(Alert, Version, ConnectionStates0),
+    send(Transport, Socket, BinMsg),
+    State0#state{connection_states = ConnectionStates}.
+
+close(downgrade, _,_,_,_) ->
+    ok;
+%% Other
+close(_, Socket, Transport, _,_) ->
+    dtls_socket:close(Transport,Socket).
 
 protocol_name() ->
     "DTLS".
         
 %%====================================================================
-%% tls_connection_sup API
-%%====================================================================
+%% Data handling
+%%====================================================================	 
 
-%%--------------------------------------------------------------------
--spec start_link(atom(), host(), inet:port_number(), port(), list(), pid(), tuple()) ->
-			{ok, pid()} | ignore |  {error, reason()}.
-%%
-%% Description: Creates a gen_fsm process which calls Module:init/1 to
-%% initialize. To ensure a synchronized start-up procedure, this function
-%% does not return until Module:init/1 has returned.  
-%%--------------------------------------------------------------------
-start_link(Role, Host, Port, Socket, Options, User, CbInfo) ->
-    {ok, proc_lib:spawn_link(?MODULE, init, [[Role, Host, Port, Socket, Options, User, CbInfo]])}.
+encode_data(Data, Version, ConnectionStates0)->
+    dtls_record:encode_data(Data, Version, ConnectionStates0).
 
-init([Role, Host, Port, Socket, Options,  User, CbInfo]) ->
-    process_flag(trap_exit, true),
-    State0 =  initial_state(Role, Host, Port, Socket, Options, User, CbInfo),
-    try
-	State = ssl_connection:ssl_config(State0#state.ssl_options, Role, State0),
-	gen_statem:enter_loop(?MODULE, [], init, State)
-    catch
-	throw:Error ->
-	    gen_statem:enter_loop(?MODULE, [], error, {Error,State0})
+passive_receive(State0 = #state{user_data_buffer = Buffer}, StateName) ->
+    case Buffer of
+	<<>> ->
+	    {Record, State} = next_record(State0),
+	    next_event(StateName, Record, State);
+	_ ->
+	    {Record, State} = ssl_connection:read_application_data(<<>>, State0),
+	    next_event(StateName, Record, State)
     end.
+next_record_if_active(State =
+		      #state{socket_options =
+			     #socket_options{active = false}}) ->
+    {no_record ,State};
 
-callback_mode() ->
-    [state_functions, state_enter].
+next_record_if_active(State) ->
+    next_record(State).
+
+send(Transport, {_, {{_,_}, _} = Socket}, Data) ->
+    send(Transport, Socket, Data);
+send(Transport, Socket, Data) ->
+   dtls_socket:send(Transport, Socket, Data).
+
+socket(Pid,  Transport, Socket, Connection, _) ->
+    dtls_socket:socket(Pid, Transport, Socket, Connection).
+
+setopts(Transport, Socket, Other) ->
+    dtls_socket:setopts(Transport, Socket, Other).
+
+getopts(Transport, Socket, Tag) ->
+    dtls_socket:getopts(Transport, Socket, Tag).
 
 %%--------------------------------------------------------------------
 %% State functions 
 %%--------------------------------------------------------------------
-
+%%--------------------------------------------------------------------
+-spec init(gen_statem:event_type(),
+	   {start, timeout()} | term(), #state{}) ->
+		   gen_statem:state_function_result().
+%%--------------------------------------------------------------------
 init(enter, _, State) ->
     {keep_state, State};     
 init({call, From}, {start, Timeout}, 
@@ -277,28 +450,33 @@ init({call, From}, {start, Timeout},
     {Record, State} = next_record(State3),
     next_event(hello, Record, State, Actions);
 init({call, _} = Type, Event, #state{role = server, transport_cb = gen_udp} = State) ->
-    Result = ssl_connection:?FUNCTION_NAME(Type, Event, 
-                                           State#state{flight_state = {retransmit, ?INITIAL_RETRANSMIT_TIMEOUT},
-                                                       protocol_specific = #{current_cookie_secret => dtls_v1:cookie_secret(), 
-                                                                             previous_cookie_secret => <<>>,
-                                                                             ignored_alerts => 0,
-                                                                             max_ignored_alerts => 10}},
-                                           ?MODULE),
+    Result = gen_handshake(?FUNCTION_NAME, Type, Event, 
+                           State#state{flight_state = {retransmit, ?INITIAL_RETRANSMIT_TIMEOUT},
+                                       protocol_specific = #{current_cookie_secret => dtls_v1:cookie_secret(), 
+                                                             previous_cookie_secret => <<>>,
+                                                             ignored_alerts => 0,
+                                                             max_ignored_alerts => 10}}),
     erlang:send_after(dtls_v1:cookie_timeout(), self(), new_cookie_secret),
     Result;
 
 init({call, _} = Type, Event, #state{role = server} = State) ->
     %% I.E. DTLS over sctp
-    ssl_connection:?FUNCTION_NAME(Type, Event, State#state{flight_state = reliable}, ?MODULE);
+    gen_handshake(?FUNCTION_NAME, Type, Event, State#state{flight_state = reliable});
 init(Type, Event, State) ->
-    ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
- 
+   gen_handshake(?FUNCTION_NAME, Type, Event, State).
+
+%%--------------------------------------------------------------------
+-spec error(gen_statem:event_type(),
+	   {start, timeout()} | term(), #state{}) ->
+		   gen_statem:state_function_result().
+%%--------------------------------------------------------------------
 error(enter, _, State) ->
     {keep_state, State};     
 error({call, From}, {start, _Timeout}, {Error, State}) ->
-    {stop_and_reply, normal, {reply, From, {error, Error}}, State};
-error({call, From}, Msg, State) ->
-    handle_call(Msg, From, ?FUNCTION_NAME, State);
+    ssl_connection:stop_and_reply(
+      normal, {reply, From, {error, Error}}, State);
+error({call, _} = Call, Msg, State) ->
+    gen_handshake(?FUNCTION_NAME, Call, Msg, State);
 error(_, _, _) ->
      {keep_state_and_data, [postpone]}.
 
@@ -393,49 +571,66 @@ hello(internal, {handshake, {#hello_verify_request{} = Handshake, _}}, State) ->
     %% hello_verify should not be in handshake history
     {next_state, ?FUNCTION_NAME, State, [{next_event, internal, Handshake}]};
 hello(info, Event, State) ->
-    handle_info(Event, ?FUNCTION_NAME, State);
+    gen_info(Event, ?FUNCTION_NAME, State);
 hello(state_timeout, Event, State) ->
     handle_state_timeout(Event, ?FUNCTION_NAME, State);
 hello(Type, Event, State) ->
-    ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
+    gen_handshake(?FUNCTION_NAME, Type, Event, State).
 
+%%--------------------------------------------------------------------
+-spec abbreviated(gen_statem:event_type(), term(), #state{}) ->
+			 gen_statem:state_function_result().
+%%--------------------------------------------------------------------
 abbreviated(enter, _, State0) ->
     {State, Actions} = handle_flight_timer(State0),
     {keep_state, State, Actions}; 
 abbreviated(info, Event, State) ->
-    handle_info(Event, ?FUNCTION_NAME, State);
+    gen_info(Event, ?FUNCTION_NAME, State);
 abbreviated(internal = Type, 
 	    #change_cipher_spec{type = <<1>>} = Event, 
 	    #state{connection_states = ConnectionStates0} = State) ->
     ConnectionStates1 = dtls_record:save_current_connection_state(ConnectionStates0, read),
     ConnectionStates = dtls_record:next_epoch(ConnectionStates1, read),
-    ssl_connection:?FUNCTION_NAME(Type, Event, State#state{connection_states = ConnectionStates}, ?MODULE);
+    gen_handshake(?FUNCTION_NAME, Type, Event, State#state{connection_states = ConnectionStates});
 abbreviated(internal = Type, #finished{} = Event, #state{connection_states = ConnectionStates} = State) ->
-    ssl_connection:?FUNCTION_NAME(Type, Event, 
-                                  prepare_flight(State#state{connection_states = ConnectionStates,
-                                                             flight_state = connection}), ?MODULE);
+    gen_handshake(?FUNCTION_NAME, Type, Event, 
+                  prepare_flight(State#state{connection_states = ConnectionStates,
+                                             flight_state = connection}));
 abbreviated(state_timeout, Event, State) ->
     handle_state_timeout(Event, ?FUNCTION_NAME, State);
 abbreviated(Type, Event, State) ->
-    ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
-
+    gen_handshake(?FUNCTION_NAME, Type, Event, State).
+%%--------------------------------------------------------------------
+-spec certify(gen_statem:event_type(), term(), #state{}) ->
+		     gen_statem:state_function_result().
+%%--------------------------------------------------------------------
 certify(enter, _, State0) ->
     {State, Actions} = handle_flight_timer(State0),
     {keep_state, State, Actions}; 
 certify(info, Event, State) ->
-    handle_info(Event, ?FUNCTION_NAME, State);
+    gen_info(Event, ?FUNCTION_NAME, State);
 certify(internal = Type, #server_hello_done{} = Event, State) ->
     ssl_connection:certify(Type, Event, prepare_flight(State), ?MODULE);
+certify(internal,  #change_cipher_spec{type = <<1>>}, State0) ->
+    {State1, Actions0} = send_handshake_flight(State0, retransmit_epoch(?FUNCTION_NAME, State0)),
+    {Record, State2} = next_record(State1),
+    {next_state, ?FUNCTION_NAME, State, Actions} = next_event(?FUNCTION_NAME, Record, State2, Actions0),
+    %% This will reset the retransmission timer by repeating the enter state event
+    {repeat_state, State, Actions};
 certify(state_timeout, Event, State) ->
     handle_state_timeout(Event, ?FUNCTION_NAME, State);
 certify(Type, Event, State) ->
-    ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
+    gen_handshake(?FUNCTION_NAME, Type, Event, State).
 
+%%--------------------------------------------------------------------
+-spec cipher(gen_statem:event_type(), term(), #state{}) ->
+		    gen_statem:state_function_result().
+%%--------------------------------------------------------------------
 cipher(enter, _, State0) ->
     {State, Actions} = handle_flight_timer(State0),
     {keep_state, State, Actions}; 
 cipher(info, Event, State) ->
-    handle_info(Event, ?FUNCTION_NAME, State);
+    gen_info(Event, ?FUNCTION_NAME, State);
 cipher(internal = Type, #change_cipher_spec{type = <<1>>} = Event,  
        #state{connection_states = ConnectionStates0} = State) ->
     ConnectionStates1 = dtls_record:save_current_connection_state(ConnectionStates0, read),
@@ -451,10 +646,15 @@ cipher(state_timeout, Event, State) ->
 cipher(Type, Event, State) ->
      ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
 
+%%--------------------------------------------------------------------
+-spec connection(gen_statem:event_type(),  
+		 #hello_request{} | #client_hello{}| term(), #state{}) ->
+			gen_statem:state_function_result().
+%%--------------------------------------------------------------------
 connection(enter, _, State) ->
     {keep_state, State};     
 connection(info, Event, State) ->
-    handle_info(Event, ?FUNCTION_NAME, State);
+    gen_info(Event, ?FUNCTION_NAME, State);
 connection(internal, #hello_request{}, #state{host = Host, port = Port,
                                               session = #session{own_certificate = Cert} = Session0,
                                               session_cache = Cache, session_cache_cb = CacheCb,
@@ -492,136 +692,24 @@ connection(Type, Event, State) ->
      ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
 
 %%TODO does this make sense for DTLS ?
+%%--------------------------------------------------------------------
+-spec downgrade(gen_statem:event_type(), term(), #state{}) ->
+		       gen_statem:state_function_result().
+%%--------------------------------------------------------------------
 downgrade(enter, _, State) ->
     {keep_state, State};
 downgrade(Type, Event, State) ->
      ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
 
 %%--------------------------------------------------------------------
-%% Description: This function is called by a gen_fsm when it receives any
-%% other message than a synchronous or asynchronous event
-%% (or a system message).
+%% gen_statem callbacks
 %%--------------------------------------------------------------------
+callback_mode() ->
+    [state_functions, state_enter].
 
-%% raw data from socket, unpack records
-handle_info({Protocol, _, _, _, Data}, StateName,
-            #state{data_tag = Protocol} = State0) ->
-    case next_dtls_record(Data, State0) of
-	{Record, State} ->
-	    next_event(StateName, Record, State);
-	#alert{} = Alert ->
-	    ssl_connection:handle_normal_shutdown(Alert, StateName, State0), 
-	    {stop, {shutdown, own_alert}}
-    end;
-handle_info({CloseTag, Socket}, StateName,
-	    #state{socket = Socket, 
-                   socket_options = #socket_options{active = Active},
-                   protocol_buffers = #protocol_buffers{dtls_cipher_texts = CTs},
-                   close_tag = CloseTag,
-		   negotiated_version = Version} = State) ->
-    %% Note that as of DTLS 1.2 (TLS 1.1),
-    %% failure to properly close a connection no longer requires that a
-    %% session not be resumed.	This is a change from DTLS 1.0 to conform
-    %% with widespread implementation practice.
-    case (Active == false) andalso (CTs =/= []) of
-        false ->
-            case Version of
-                {254, N} when N =< 253 ->
-                    ok;
-                _ ->
-                    %% As invalidate_sessions here causes performance issues,
-                    %% we will conform to the widespread implementation
-                    %% practice and go aginst the spec
-                    %%invalidate_session(Role, Host, Port, Session)
-                    ok
-            end,
-            ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
-            {stop, {shutdown, transport_closed}};
-        true ->
-            %% Fixes non-delivery of final DTLS record in {active, once}.
-            %% Basically allows the application the opportunity to set {active, once} again
-            %% and then receive the final message.
-            next_event(StateName, no_record, State)
-    end;
-
-handle_info(new_cookie_secret, StateName, 
-            #state{protocol_specific = #{current_cookie_secret := Secret} = CookieInfo} = State) ->
-    erlang:send_after(dtls_v1:cookie_timeout(), self(), new_cookie_secret),
-    {next_state, StateName, State#state{protocol_specific = 
-                                            CookieInfo#{current_cookie_secret => dtls_v1:cookie_secret(),
-                                                        previous_cookie_secret => Secret}}};
-handle_info(Msg, StateName, State) ->
-    ssl_connection:StateName(info, Msg, State, ?MODULE).
-
-handle_call(Event, From, StateName, State) ->
-    ssl_connection:handle_call(Event, From, StateName, State, ?MODULE).
-
-handle_common_event(internal, #alert{} = Alert, StateName, 
-		    #state{negotiated_version = Version} = State) ->
-    handle_own_alert(Alert, Version, StateName, State);
-%%% DTLS record protocol level handshake messages 
-handle_common_event(internal, #ssl_tls{type = ?HANDSHAKE,
-				       fragment = Data}, 
-		    StateName, 
-		    #state{protocol_buffers = Buffers0,
-			   negotiated_version = Version} = State0) ->
-    try
-	case dtls_handshake:get_dtls_handshake(Version, Data, Buffers0) of
-	    {[], Buffers} ->
-		{Record, State} = next_record(State0#state{protocol_buffers = Buffers}),
-		next_event(StateName, Record, State);
-	    {Packets, Buffers} ->
-		State = State0#state{protocol_buffers = Buffers},
-		Events = dtls_handshake_events(Packets),
-                {next_state, StateName, 
-                 State#state{unprocessed_handshake_events = unprocessed_events(Events)}, Events}
-	end
-    catch throw:#alert{} = Alert ->
-	    handle_own_alert(Alert, Version, StateName, State0)
-    end;
-%%% DTLS record protocol level application data messages 
-handle_common_event(internal, #ssl_tls{type = ?APPLICATION_DATA, fragment = Data}, StateName, State) ->
-    {next_state, StateName, State, [{next_event, internal, {application_data, Data}}]};
-%%% DTLS record protocol level change cipher messages
-handle_common_event(internal, #ssl_tls{type = ?CHANGE_CIPHER_SPEC, fragment = Data}, StateName, State) ->
-    {next_state, StateName, State, [{next_event, internal, #change_cipher_spec{type = Data}}]};
-%%% DTLS record protocol level Alert messages
-handle_common_event(internal, #ssl_tls{type = ?ALERT, fragment = EncAlerts}, StateName,
-		    #state{negotiated_version = Version} = State) ->
-    case decode_alerts(EncAlerts) of
-	Alerts = [_|_] ->
-	    handle_alerts(Alerts,  {next_state, StateName, State});
-	#alert{} = Alert ->
-	    handle_own_alert(Alert, Version, StateName, State)
-    end;
-%% Ignore unknown TLS record level protocol messages
-handle_common_event(internal, #ssl_tls{type = _Unknown}, StateName, State) ->
-    {next_state, StateName, State}.
-
-handle_state_timeout(flight_retransmission_timeout, StateName, 
-                    #state{flight_state = {retransmit, NextTimeout}} = State0) ->
-    {State1, Actions} = send_handshake_flight(State0#state{flight_state = {retransmit, NextTimeout}}, 
-                                              retransmit_epoch(StateName, State0)),
-    {Record, State} = next_record(State1),
-    next_event(StateName, Record, State, Actions).
-
-send(Transport, {_, {{_,_}, _} = Socket}, Data) ->
-    send(Transport, Socket, Data);
-send(Transport, Socket, Data) ->
-   dtls_socket:send(Transport, Socket, Data).
-%%--------------------------------------------------------------------
-%% Description:This function is called by a gen_fsm when it is about
-%% to terminate. It should be the opposite of Module:init/1 and do any
-%% necessary cleaning up. When it returns, the gen_fsm terminates with
-%% Reason. The return value is ignored.
-%%--------------------------------------------------------------------
 terminate(Reason, StateName, State) ->
     ssl_connection:terminate(Reason, StateName, State).
 
-%%--------------------------------------------------------------------
-%% code_change(OldVsn, StateName, State, Extra) -> {ok, StateName, NewState}
-%% Description: Convert process state when code is changed
-%%--------------------------------------------------------------------
 code_change(_OldVsn, StateName, State, _Extra) ->
     {ok, StateName, State}.
 
@@ -631,55 +719,6 @@ format_status(Type, Data) ->
 %%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------
-handle_client_hello(#client_hello{client_version = ClientVersion} = Hello,
-		    #state{connection_states = ConnectionStates0,
-			   port = Port, session = #session{own_certificate = Cert} = Session0,
-			   renegotiation = {Renegotiation, _},
-			   session_cache = Cache,
-			   session_cache_cb = CacheCb,
-			   negotiated_protocol = CurrentProtocol,
-			   key_algorithm = KeyExAlg,
-			   ssl_options = SslOpts} = State0) ->
-    
-    case dtls_handshake:hello(Hello, SslOpts, {Port, Session0, Cache, CacheCb,
-					       ConnectionStates0, Cert, KeyExAlg}, Renegotiation) of
-	#alert{} = Alert ->
-	    handle_own_alert(Alert, ClientVersion, hello, State0);
-	{Version, {Type, Session},
-	 ConnectionStates, Protocol0, ServerHelloExt, HashSign} ->
-	    Protocol = case Protocol0 of
-			   undefined -> CurrentProtocol;
-			   _ -> Protocol0
-		       end,
-
-	    State = prepare_flight(State0#state{connection_states = ConnectionStates,
-						negotiated_version = Version,
-						hashsign_algorithm = HashSign,
-						session = Session,
-						negotiated_protocol = Protocol}),
-	    
-	    ssl_connection:hello(internal, {common_client_hello, Type, ServerHelloExt},
-				 State, ?MODULE)
-    end.
-
-encode_handshake_flight(Flight, Version, MaxFragmentSize, Epoch, ConnectionStates) ->
-    Fragments = lists:map(fun(Handshake) ->
-				  dtls_handshake:fragment_handshake(Handshake, MaxFragmentSize)
-			  end, Flight),
-    dtls_record:encode_handshake(Fragments, Version, Epoch, ConnectionStates).
-
-encode_change_cipher(#change_cipher_spec{}, Version, Epoch, ConnectionStates) ->
-    dtls_record:encode_change_cipher_spec(Version, Epoch, ConnectionStates).
-
-encode_data(Data, Version, ConnectionStates0)->
-    dtls_record:encode_data(Data, Version, ConnectionStates0).
-
-encode_alert(#alert{} = Alert, Version, ConnectionStates) ->
-    dtls_record:encode_alert_record(Alert, Version, ConnectionStates).
-
-decode_alerts(Bin) ->
-    ssl_alert:decode(Bin).
-
 initial_state(Role, Host, Port, Socket, {SSLOptions, SocketOptions, _}, User,
 	      {CbModule, DataTag, CloseTag, ErrorTag}) ->
     #ssl_options{beast_mitigation = BeastMitigation} = SSLOptions,
@@ -720,10 +759,12 @@ initial_state(Role, Host, Port, Socket, {SSLOptions, SocketOptions, _}, User,
            flight_state = {retransmit, ?INITIAL_RETRANSMIT_TIMEOUT}
 	  }.
 
-next_dtls_record(Data, #state{protocol_buffers = #protocol_buffers{
+next_dtls_record(Data, StateName, #state{protocol_buffers = #protocol_buffers{
 						   dtls_record_buffer = Buf0,
 						   dtls_cipher_texts = CT0} = Buffers} = State0) ->
-    case dtls_record:get_dtls_records(Data, Buf0) of
+    case dtls_record:get_dtls_records(Data,
+                                      acceptable_record_versions(StateName, State0), 
+                                      Buf0) of
 	{Records, Buf1} ->
 	    CT1 = CT0 ++ Records,
 	    next_record(State0#state{protocol_buffers =
@@ -733,153 +774,15 @@ next_dtls_record(Data, #state{protocol_buffers = #protocol_buffers{
 	    Alert
     end.
 
-next_record(#state{unprocessed_handshake_events = N} = State) when N > 0 ->
-    {no_record, State#state{unprocessed_handshake_events = N-1}};
-					 
-next_record(#state{protocol_buffers =
-		       #protocol_buffers{dtls_cipher_texts = [#ssl_tls{epoch = Epoch} = CT | Rest]}
-		   = Buffers,
-		   connection_states = #{current_read := #{epoch := Epoch}} = ConnectionStates} = State) ->
-    CurrentRead = dtls_record:get_connection_state_by_epoch(Epoch, ConnectionStates, read),
-    case dtls_record:replay_detect(CT, CurrentRead) of
-        false ->
-            decode_cipher_text(State#state{connection_states = ConnectionStates}) ;
-        true ->
-            %% Ignore replayed record
-            next_record(State#state{protocol_buffers =
-                                        Buffers#protocol_buffers{dtls_cipher_texts = Rest},
-                                    connection_states = ConnectionStates})
-    end;
-next_record(#state{protocol_buffers =
-		       #protocol_buffers{dtls_cipher_texts = [#ssl_tls{epoch = Epoch} | Rest]}
-		   = Buffers,
-		   connection_states = #{current_read := #{epoch := CurrentEpoch}} = ConnectionStates} = State) 
-  when Epoch > CurrentEpoch ->
-    %% TODO Buffer later Epoch message, drop it for now
-    next_record(State#state{protocol_buffers =
-                                Buffers#protocol_buffers{dtls_cipher_texts = Rest},
-                            connection_states = ConnectionStates});
-next_record(#state{protocol_buffers =
-		       #protocol_buffers{dtls_cipher_texts = [ _ | Rest]}
-		   = Buffers,
-		   connection_states = ConnectionStates} = State) ->
-    %% Drop old epoch message
-    next_record(State#state{protocol_buffers =
-                                Buffers#protocol_buffers{dtls_cipher_texts = Rest},
-                            connection_states = ConnectionStates});
-next_record(#state{role = server,
-		   socket = {Listener, {Client, _}},
-		   transport_cb = gen_udp} = State) -> 
-    dtls_udp_listener:active_once(Listener, Client, self()),
-    {no_record, State};
-next_record(#state{role = client,
-		   socket = {_Server, Socket},
-		   transport_cb = Transport} = State) -> 
-    dtls_socket:setopts(Transport, Socket, [{active,once}]),
-    {no_record, State};
-next_record(State) ->
-    {no_record, State}.
-
-next_record_if_active(State =
-		      #state{socket_options =
-			     #socket_options{active = false}}) ->
-    {no_record ,State};
-
-next_record_if_active(State) ->
-    next_record(State).
-
-passive_receive(State0 = #state{user_data_buffer = Buffer}, StateName) ->
-    case Buffer of
-	<<>> ->
-	    {Record, State} = next_record(State0),
-	    next_event(StateName, Record, State);
-	_ ->
-	    {Record, State} = ssl_connection:read_application_data(<<>>, State0),
-	    next_event(StateName, Record, State)
-    end.
-
-next_event(StateName, Record, State) ->
-    next_event(StateName, Record, State, []).
+acceptable_record_versions(hello, _) ->
+    [dtls_record:protocol_version(Vsn) || Vsn <- ?ALL_DATAGRAM_SUPPORTED_VERSIONS];
+acceptable_record_versions(_, #state{negotiated_version = Version}) ->
+    [Version].
 
-next_event(connection = StateName, no_record,
-	   #state{connection_states = #{current_read := #{epoch := CurrentEpoch}}} = State0, Actions) ->
-    case next_record_if_active(State0) of
-	{no_record, State} ->
-            ssl_connection:hibernate_after(StateName, State, Actions);
-        {#ssl_tls{epoch = CurrentEpoch,
-                  type = ?HANDSHAKE,
-                  version = Version} = Record, State1} ->
-            State = dtls_version(StateName, Version, State1), 
-	    {next_state, StateName, State,
-	     [{next_event, internal, {protocol_record, Record}} | Actions]};
-        {#ssl_tls{epoch = CurrentEpoch} = Record, State} ->
-	    {next_state, StateName, State, [{next_event, internal, {protocol_record, Record}} | Actions]};
-	{#ssl_tls{epoch = Epoch,
-		  type = ?HANDSHAKE,
-		  version = _Version}, State1} = _Record when Epoch == CurrentEpoch-1 ->
-	    {State2, MoreActions} = send_handshake_flight(State1, CurrentEpoch),
-            {NextRecord, State} = next_record(State2),
-            next_event(StateName, NextRecord, State, Actions ++ MoreActions);
-        %% From FLIGHT perspective CHANGE_CIPHER_SPEC is treated as a handshake
-        {#ssl_tls{epoch = Epoch,
-		  type = ?CHANGE_CIPHER_SPEC,
-		  version = _Version}, State1} = _Record when Epoch == CurrentEpoch-1 ->
-	    {State2, MoreActions} = send_handshake_flight(State1, CurrentEpoch),
-	    {NextRecord, State} = next_record(State2),
-            next_event(StateName, NextRecord, State, Actions ++ MoreActions);
-	{#ssl_tls{epoch = _Epoch,
-		  version = _Version}, State1} ->
-	    %% TODO maybe buffer later epoch
-            {Record, State} = next_record(State1),
-            next_event(StateName, Record, State, Actions); 
-	{#alert{} = Alert, State} ->
-	    {next_state, StateName, State, [{next_event, internal, Alert} | Actions]}
-    end;
-next_event(connection = StateName, Record,
-	   #state{connection_states = #{current_read := #{epoch := CurrentEpoch}}} = State0, Actions) ->
-    case Record of
-        #ssl_tls{epoch = CurrentEpoch,
-                 type = ?HANDSHAKE,
-                 version = Version} = Record ->
-            State = dtls_version(StateName, Version, State0), 
-	    {next_state, StateName, State,
-	     [{next_event, internal, {protocol_record, Record}} | Actions]};
-	#ssl_tls{epoch = CurrentEpoch} ->
-	    {next_state, StateName, State0, [{next_event, internal, {protocol_record, Record}} | Actions]};
-	#ssl_tls{epoch = Epoch,
-                 type = ?HANDSHAKE,
-                 version = _Version} when Epoch == CurrentEpoch-1 ->
-	    {State1, MoreActions} = send_handshake_flight(State0, CurrentEpoch),
-            {NextRecord, State} = next_record(State1),
-            next_event(StateName, NextRecord, State, Actions ++ MoreActions);
-        %% From FLIGHT perspective CHANGE_CIPHER_SPEC is treated as a handshake
-        #ssl_tls{epoch = Epoch,
-                 type = ?CHANGE_CIPHER_SPEC,
-                 version = _Version} when Epoch == CurrentEpoch-1 ->
-	    {State1, MoreActions} = send_handshake_flight(State0, CurrentEpoch),
-            {NextRecord, State} = next_record(State1),
-            next_event(StateName, NextRecord, State, Actions ++ MoreActions); 
-        _ -> 
-            next_event(StateName, no_record, State0, Actions) 
-    end;
-next_event(StateName, Record, 
-	   #state{connection_states = #{current_read := #{epoch := CurrentEpoch}}} = State0, Actions) ->
-    case Record of
-	no_record ->
-	    {next_state, StateName, State0, Actions};
-        #ssl_tls{epoch = CurrentEpoch,
-                 version = Version} = Record ->
-            State = dtls_version(StateName, Version, State0),
-            {next_state, StateName,  State,
-         [{next_event, internal, {protocol_record, Record}} | Actions]};
-	#ssl_tls{epoch = _Epoch,
-		 version = _Version} = _Record ->
-	    %% TODO maybe buffer later epoch
-            {Record, State} = next_record(State0),
-            next_event(StateName, Record, State, Actions); 
-	#alert{} = Alert ->
-	    {next_state, StateName, State0, [{next_event, internal, Alert} | Actions]}
-    end.
+dtls_handshake_events(Packets) ->
+    lists:map(fun(Packet) ->
+		      {next_event, internal, {handshake, Packet}}
+	      end, Packets).
 
 decode_cipher_text(#state{protocol_buffers = #protocol_buffers{dtls_cipher_texts = [ CT | Rest]} = Buffers,
                           connection_states = ConnStates0} = State) ->
@@ -897,6 +800,177 @@ dtls_version(hello, Version, #state{role = server} = State) ->
 dtls_version(_,_, State) ->
     State.
 
+handle_client_hello(#client_hello{client_version = ClientVersion} = Hello,
+		    #state{connection_states = ConnectionStates0,
+			   port = Port, session = #session{own_certificate = Cert} = Session0,
+			   renegotiation = {Renegotiation, _},
+			   session_cache = Cache,
+			   session_cache_cb = CacheCb,
+			   negotiated_protocol = CurrentProtocol,
+			   key_algorithm = KeyExAlg,
+			   ssl_options = SslOpts} = State0) ->
+    
+    case dtls_handshake:hello(Hello, SslOpts, {Port, Session0, Cache, CacheCb,
+					       ConnectionStates0, Cert, KeyExAlg}, Renegotiation) of
+	#alert{} = Alert ->
+	    handle_own_alert(Alert, ClientVersion, hello, State0);
+	{Version, {Type, Session},
+	 ConnectionStates, Protocol0, ServerHelloExt, HashSign} ->
+	    Protocol = case Protocol0 of
+			   undefined -> CurrentProtocol;
+			   _ -> Protocol0
+		       end,
+
+	    State = prepare_flight(State0#state{connection_states = ConnectionStates,
+						negotiated_version = Version,
+						hashsign_algorithm = HashSign,
+                                                client_hello_version = ClientVersion,
+						session = Session,
+						negotiated_protocol = Protocol}),
+	    
+	    ssl_connection:hello(internal, {common_client_hello, Type, ServerHelloExt},
+				 State, ?MODULE)
+    end.
+
+
+%% raw data from socket, unpack records
+handle_info({Protocol, _, _, _, Data}, StateName,
+            #state{data_tag = Protocol} = State0) ->
+    case next_dtls_record(Data, StateName, State0) of
+	{Record, State} ->
+	    next_event(StateName, Record, State);
+	#alert{} = Alert ->
+	    ssl_connection:handle_normal_shutdown(Alert, StateName, State0), 
+	    ssl_connection:stop({shutdown, own_alert}, State0)
+    end;
+handle_info({CloseTag, Socket}, StateName,
+	    #state{socket = Socket, 
+                   socket_options = #socket_options{active = Active},
+                   protocol_buffers = #protocol_buffers{dtls_cipher_texts = CTs},
+                   close_tag = CloseTag,
+		   negotiated_version = Version} = State) ->
+    %% Note that as of DTLS 1.2 (TLS 1.1),
+    %% failure to properly close a connection no longer requires that a
+    %% session not be resumed.	This is a change from DTLS 1.0 to conform
+    %% with widespread implementation practice.
+    case (Active == false) andalso (CTs =/= []) of
+        false ->
+            case Version of
+                {254, N} when N =< 253 ->
+                    ok;
+                _ ->
+                    %% As invalidate_sessions here causes performance issues,
+                    %% we will conform to the widespread implementation
+                    %% practice and go aginst the spec
+                    %%invalidate_session(Role, Host, Port, Session)
+                    ok
+            end,
+            ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
+            ssl_connection:stop({shutdown, transport_closed}, State);
+        true ->
+            %% Fixes non-delivery of final DTLS record in {active, once}.
+            %% Basically allows the application the opportunity to set {active, once} again
+            %% and then receive the final message.
+            next_event(StateName, no_record, State)
+    end;
+
+handle_info(new_cookie_secret, StateName, 
+            #state{protocol_specific = #{current_cookie_secret := Secret} = CookieInfo} = State) ->
+    erlang:send_after(dtls_v1:cookie_timeout(), self(), new_cookie_secret),
+    {next_state, StateName, State#state{protocol_specific = 
+                                            CookieInfo#{current_cookie_secret => dtls_v1:cookie_secret(),
+                                                        previous_cookie_secret => Secret}}};
+handle_info(Msg, StateName, State) ->
+    ssl_connection:StateName(info, Msg, State, ?MODULE).
+
+handle_state_timeout(flight_retransmission_timeout, StateName,
+                     #state{flight_state = {retransmit, NextTimeout}} = State0) ->
+    {State1, Actions0} = send_handshake_flight(State0#state{flight_state = {retransmit, NextTimeout}}, 
+                                              retransmit_epoch(StateName, State0)),
+    {Record, State2} = next_record(State1),
+    {next_state, StateName, State, Actions} = next_event(StateName, Record, State2, Actions0),
+    %% This will reset the retransmission timer by repeating the enter state event
+    {repeat_state, State, Actions}.
+
+handle_alerts([], Result) ->
+    Result;
+handle_alerts(_, {stop, _, _} = Stop) ->
+    Stop;
+handle_alerts([Alert | Alerts], {next_state, StateName, State}) ->
+     handle_alerts(Alerts, ssl_connection:handle_alert(Alert, StateName, State));
+handle_alerts([Alert | Alerts], {next_state, StateName, State, _Actions}) ->
+     handle_alerts(Alerts, ssl_connection:handle_alert(Alert, StateName, State)).
+
+handle_own_alert(Alert, Version, StateName, #state{transport_cb = gen_udp,
+                                                   role = Role,
+                                                   ssl_options = Options} = State0) ->
+    case ignore_alert(Alert, State0) of
+        {true, State} ->
+            log_ignore_alert(Options#ssl_options.log_alert, StateName, Alert, Role),
+            {next_state, StateName, State};
+        {false, State} ->
+            ssl_connection:handle_own_alert(Alert, Version, StateName, State)
+    end;
+handle_own_alert(Alert, Version, StateName, State) ->
+    ssl_connection:handle_own_alert(Alert, Version, StateName, State).
+
+encode_handshake_flight(Flight, Version, MaxFragmentSize, Epoch, ConnectionStates) ->
+    Fragments = lists:map(fun(Handshake) ->
+				  dtls_handshake:fragment_handshake(Handshake, MaxFragmentSize)
+			  end, Flight),
+    dtls_record:encode_handshake(Fragments, Version, Epoch, ConnectionStates).
+
+encode_change_cipher(#change_cipher_spec{}, Version, Epoch, ConnectionStates) ->
+    dtls_record:encode_change_cipher_spec(Version, Epoch, ConnectionStates).
+
+decode_alerts(Bin) ->
+    ssl_alert:decode(Bin).
+
+gen_handshake(StateName, Type, Event, 
+	      #state{negotiated_version = Version} = State) ->
+    try ssl_connection:StateName(Type, Event, State, ?MODULE) of
+	Result ->
+	    Result
+    catch 
+	_:_ ->
+ 	    ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, 
+						       malformed_handshake_data),
+					    Version, StateName, State)  
+    end.
+
+gen_info(Event, connection = StateName,  #state{negotiated_version = Version} = State) ->
+    try handle_info(Event, StateName, State) of
+	Result ->
+	    Result
+    catch 
+	_:_ ->
+	    ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?INTERNAL_ERROR, 
+						       malformed_data), 
+					    Version, StateName, State)  
+    end;
+
+gen_info(Event, StateName, #state{negotiated_version = Version} = State) ->
+    try handle_info(Event, StateName, State) of
+	Result ->
+	    Result
+    catch 
+        _:_ ->
+	    ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, 
+						       malformed_handshake_data), 
+					    Version, StateName, State)  
+    end.
+unprocessed_events(Events) ->
+    %% The first handshake event will be processed immediately
+    %% as it is entered first in the event queue and
+    %% when it is processed there will be length(Events)-1
+    %% handshake events left to process before we should
+    %% process more TLS-records received on the socket. 
+    erlang:length(Events)-1.
+
+update_handshake_history(#hello_verify_request{}, _, Hist) ->
+    Hist;
+update_handshake_history(_, Handshake, Hist) ->
+    ssl_handshake:update_handshake_history(Hist, iolist_to_binary(Handshake)).
 prepare_flight(#state{flight_buffer = Flight,
 		      connection_states = ConnectionStates0,
 		      protocol_buffers = 
@@ -937,67 +1011,67 @@ new_timeout(N) when N =< 30 ->
 new_timeout(_) -> 
     60.
 
-dtls_handshake_events(Packets) ->
-    lists:map(fun(Packet) ->
-		      {next_event, internal, {handshake, Packet}}
-	      end, Packets).
+send_handshake_flight(#state{socket = Socket,
+			     transport_cb = Transport,
+			     flight_buffer = #{handshakes := Flight,
+					       change_cipher_spec := undefined},
+			     negotiated_version = Version,
+			     connection_states = ConnectionStates0} = State0, Epoch) ->
+    %% TODO remove hardcoded Max size
+    {Encoded, ConnectionStates} =
+	encode_handshake_flight(lists:reverse(Flight), Version, 1400, Epoch, ConnectionStates0),
+    send(Transport, Socket, Encoded), 
+   {State0#state{connection_states = ConnectionStates}, []};
 
-renegotiate(#state{role = client} = State, Actions) ->
-    %% Handle same way as if server requested
-    %% the renegotiation
-    %%    Hs0 = ssl_handshake:init_handshake_history(),
-    {next_state, connection, State,
-     [{next_event, internal, #hello_request{}} | Actions]};
+send_handshake_flight(#state{socket = Socket,
+			     transport_cb = Transport,
+			     flight_buffer = #{handshakes := [_|_] = Flight0,
+					       change_cipher_spec := ChangeCipher,
+					       handshakes_after_change_cipher_spec := []},
+			     negotiated_version = Version,
+			     connection_states = ConnectionStates0} = State0, Epoch) ->      
+    {HsBefore, ConnectionStates1} =
+	encode_handshake_flight(lists:reverse(Flight0), Version, 1400, Epoch, ConnectionStates0),
+    {EncChangeCipher, ConnectionStates} = encode_change_cipher(ChangeCipher, Version, Epoch, ConnectionStates1),
 
-renegotiate(#state{role = server} = State0, Actions) ->
-    HelloRequest = ssl_handshake:hello_request(),
-    State1 = prepare_flight(State0),
-    {State2, MoreActions} = send_handshake(HelloRequest, State1),
-    {Record, State} = next_record(State2),
-    next_event(hello, Record, State, Actions ++ MoreActions).
+    send(Transport, Socket, [HsBefore, EncChangeCipher]),
+    {State0#state{connection_states = ConnectionStates}, []};
 
-handle_alerts([], Result) ->
-    Result;
-handle_alerts(_, {stop,_} = Stop) ->
-    Stop;
-handle_alerts([Alert | Alerts], {next_state, StateName, State}) ->
-     handle_alerts(Alerts, ssl_connection:handle_alert(Alert, StateName, State));
-handle_alerts([Alert | Alerts], {next_state, StateName, State, _Actions}) ->
-     handle_alerts(Alerts, ssl_connection:handle_alert(Alert, StateName, State)).
+send_handshake_flight(#state{socket = Socket,
+			     transport_cb = Transport,
+			     flight_buffer = #{handshakes := [_|_] = Flight0,
+					       change_cipher_spec := ChangeCipher,
+					       handshakes_after_change_cipher_spec := Flight1},
+			     negotiated_version = Version,
+			     connection_states = ConnectionStates0} = State0, Epoch) ->      
+    {HsBefore, ConnectionStates1} =
+	encode_handshake_flight(lists:reverse(Flight0), Version, 1400, Epoch-1, ConnectionStates0),
+    {EncChangeCipher, ConnectionStates2} = 
+	encode_change_cipher(ChangeCipher, Version, Epoch-1, ConnectionStates1),
+    {HsAfter, ConnectionStates} =
+	encode_handshake_flight(lists:reverse(Flight1), Version, 1400, Epoch, ConnectionStates2),
+    send(Transport, Socket, [HsBefore, EncChangeCipher, HsAfter]),
+    {State0#state{connection_states = ConnectionStates}, []};
+
+send_handshake_flight(#state{socket = Socket,
+			     transport_cb = Transport,
+			     flight_buffer = #{handshakes := [],
+					       change_cipher_spec := ChangeCipher,
+					       handshakes_after_change_cipher_spec := Flight1},
+			     negotiated_version = Version,
+			     connection_states = ConnectionStates0} = State0, Epoch) ->
+    {EncChangeCipher, ConnectionStates1} = 
+	encode_change_cipher(ChangeCipher, Version, Epoch-1, ConnectionStates0),
+    {HsAfter, ConnectionStates} =
+	encode_handshake_flight(lists:reverse(Flight1), Version, 1400, Epoch, ConnectionStates1),
+    send(Transport, Socket, [EncChangeCipher, HsAfter]),
+    {State0#state{connection_states = ConnectionStates}, []}.
 
 retransmit_epoch(_StateName, #state{connection_states = ConnectionStates}) ->
     #{epoch := Epoch} = 
 	ssl_record:current_connection_state(ConnectionStates, write),
     Epoch.
 	    
-update_handshake_history(#hello_verify_request{}, _, Hist) ->
-    Hist;
-update_handshake_history(_, Handshake, Hist) ->
-    %% DTLS never needs option "v2_hello_compatible" to be true
-    ssl_handshake:update_handshake_history(Hist, iolist_to_binary(Handshake), false).
-
-unprocessed_events(Events) ->
-    %% The first handshake event will be processed immediately
-    %% as it is entered first in the event queue and
-    %% when it is processed there will be length(Events)-1
-    %% handshake events left to process before we should
-    %% process more TLS-records received on the socket. 
-    erlang:length(Events)-1.
-
-handle_own_alert(Alert, Version, StateName, #state{transport_cb = gen_udp,
-                                                   role = Role,
-                                                   ssl_options = Options} = State0) ->
-    case ignore_alert(Alert, State0) of
-        {true, State} ->
-            log_ignore_alert(Options#ssl_options.log_alert, StateName, Alert, Role),
-            {next_state, StateName, State};
-        {false, State} ->
-            ssl_connection:handle_own_alert(Alert, Version, StateName, State)
-    end;
-handle_own_alert(Alert, Version, StateName, State) ->
-    ssl_connection:handle_own_alert(Alert, Version, StateName, State).
-
-
 ignore_alert(#alert{level = ?FATAL}, #state{protocol_specific = #{ignored_alerts := N,
                                                   max_ignored_alerts := N}} = State) ->
     {false, State};
diff --git a/lib/ssl/src/dtls_handshake.erl b/lib/ssl/src/dtls_handshake.erl
index 37a46b862e..6071eece13 100644
--- a/lib/ssl/src/dtls_handshake.erl
+++ b/lib/ssl/src/dtls_handshake.erl
@@ -16,6 +16,11 @@
 %% limitations under the License.
 %%
 %% %CopyrightEnd%
+
+%%----------------------------------------------------------------------
+%% Purpose: Help funtions for handling the DTLS (specific parts of)
+%%% SSL/TLS/DTLS handshake protocol
+%%----------------------------------------------------------------------
 -module(dtls_handshake).
 
 -include("dtls_connection.hrl").
@@ -24,15 +29,21 @@
 -include("ssl_internal.hrl").
 -include("ssl_alert.hrl").
 
+%% Handshake handling
 -export([client_hello/8, client_hello/9, cookie/4, hello/4, 
-	 hello_verify_request/2, get_dtls_handshake/3, fragment_handshake/2,
-	 handshake_bin/2, encode_handshake/3]).
+	 hello_verify_request/2]).
+        
+%% Handshake encoding
+-export([fragment_handshake/2, encode_handshake/3]).
+
+%% Handshake decodeing
+-export([get_dtls_handshake/3]). 
 
 -type dtls_handshake() :: #client_hello{} | #hello_verify_request{} | 
 			  ssl_handshake:ssl_handshake().
 
 %%====================================================================
-%% Internal application API
+%% Handshake handling
 %%====================================================================
 %%--------------------------------------------------------------------
 -spec client_hello(host(), inet:port_number(), ssl_record:connection_states(),
@@ -56,7 +67,8 @@ client_hello(Host, Port, ConnectionStates, SslOpts,
 %%--------------------------------------------------------------------
 client_hello(Host, Port, Cookie, ConnectionStates,
 	     #ssl_options{versions = Versions,
-			  ciphers = UserSuites
+			  ciphers = UserSuites,
+                          fallback = Fallback
 			 } = SslOpts,
 	     Cache, CacheCb, Renegotiation, OwnCert) ->
     Version =  dtls_record:highest_protocol_version(Versions),
@@ -66,12 +78,15 @@ client_hello(Host, Port, Cookie, ConnectionStates,
     CipherSuites = ssl_handshake:available_suites(UserSuites, TLSVersion),
 
     Extensions = ssl_handshake:client_hello_extensions(TLSVersion, CipherSuites,
-                                                       SslOpts, ConnectionStates, Renegotiation),
+                                                       SslOpts, ConnectionStates, 
+                                                       Renegotiation),
     Id = ssl_session:client_id({Host, Port, SslOpts}, Cache, CacheCb, OwnCert),
 
     #client_hello{session_id = Id,
 		  client_version = Version,
-		  cipher_suites = ssl_handshake:cipher_suites(CipherSuites, Renegotiation),
+		  cipher_suites = 
+                      ssl_handshake:cipher_suites(CipherSuites, 
+                                                  Renegotiation, Fallback),
 		  compression_methods = ssl_record:compressions(),
 		  random = SecParams#security_parameters.client_random,
 		  cookie = Cookie,
@@ -87,11 +102,11 @@ hello(#server_hello{server_version = Version, random = Random,
     case dtls_record:is_acceptable_version(Version, SupportedVersions) of
 	true ->
 	    handle_server_hello_extensions(Version, SessionId, Random, CipherSuite,
-					   Compression, HelloExt, SslOpt, ConnectionStates0, Renegotiation);
+					   Compression, HelloExt, SslOpt, 
+                                           ConnectionStates0, Renegotiation);
 	false ->
 	    ?ALERT_REC(?FATAL, ?PROTOCOL_VERSION)
     end;
-
 hello(#client_hello{client_version = ClientVersion} = Hello,
       #ssl_options{versions = Versions} = SslOpts,
       Info, Renegotiation) ->
@@ -107,7 +122,7 @@ cookie(Key, Address, Port, #client_hello{client_version = {Major, Minor},
 		  <<?BYTE(Major), ?BYTE(Minor)>>,
 		  Random, SessionId, CipherSuites, CompressionMethods],
     crypto:hmac(sha, Key, CookieData).
-
+%%--------------------------------------------------------------------
 -spec hello_verify_request(binary(),  dtls_record:dtls_version()) -> #hello_verify_request{}.
 %%
 %% Description: Creates a hello verify request message sent by server to
@@ -117,11 +132,8 @@ hello_verify_request(Cookie, Version) ->
     #hello_verify_request{protocol_version = Version, cookie = Cookie}.
 
 %%--------------------------------------------------------------------
-
-encode_handshake(Handshake, Version, Seq) ->
-    {MsgType, Bin} = enc_handshake(Handshake, Version),
-    Len = byte_size(Bin),
-    [MsgType, ?uint24(Len), ?uint16(Seq), ?uint24(0), ?uint24(Len), Bin].
+%%% Handshake encoding
+%%--------------------------------------------------------------------
 
 fragment_handshake(Bin, _) when is_binary(Bin)-> 
     %% This is the change_cipher_spec not a "real handshake" but part of the flight
@@ -129,10 +141,15 @@ fragment_handshake(Bin, _) when is_binary(Bin)->
 fragment_handshake([MsgType, Len, Seq, _, Len, Bin], Size) ->
     Bins = bin_fragments(Bin, Size),
     handshake_fragments(MsgType, Seq, Len, Bins, []).
+encode_handshake(Handshake, Version, Seq) ->
+    {MsgType, Bin} = enc_handshake(Handshake, Version),
+    Len = byte_size(Bin),
+    [MsgType, ?uint24(Len), ?uint16(Seq), ?uint24(0), ?uint24(Len), Bin].
+  
+%%--------------------------------------------------------------------
+%%% Handshake decodeing
+%%--------------------------------------------------------------------
 
-handshake_bin([Type, Length, Data], Seq) ->	
-    handshake_bin(Type, Length, Seq, Data).
-    
 %%--------------------------------------------------------------------
 -spec get_dtls_handshake(dtls_record:dtls_version(), binary(), #protocol_buffers{}) ->
                                 {[dtls_handshake()], #protocol_buffers{}}.                
@@ -147,16 +164,19 @@ get_dtls_handshake(Version, Fragment, ProtocolBuffers) ->
 %%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------
-handle_client_hello(Version, #client_hello{session_id = SugesstedId,
-					   cipher_suites = CipherSuites,
-					   compression_methods = Compressions,
-					   random = Random,
-					   extensions =
-					       #hello_extensions{elliptic_curves = Curves,
-								 signature_algs = ClientHashSigns} = HelloExt},
+handle_client_hello(Version, 
+                    #client_hello{session_id = SugesstedId,
+                                  cipher_suites = CipherSuites,
+                                  compression_methods = Compressions,
+                                  random = Random,
+                                  extensions =
+                                      #hello_extensions{elliptic_curves = Curves,
+                                                        signature_algs = ClientHashSigns} 
+                                  = HelloExt},
 		    #ssl_options{versions = Versions,
 				 signature_algs = SupportedHashSigns} = SslOpts,
-		    {Port, Session0, Cache, CacheCb, ConnectionStates0, Cert, _}, Renegotiation) ->
+		    {Port, Session0, Cache, CacheCb, ConnectionStates0, Cert, _}, 
+                    Renegotiation) ->
     case dtls_record:is_acceptable_version(Version, Versions) of
 	true ->
 	    TLSVersion = dtls_v1:corresponding_tls_version(Version),
@@ -164,14 +184,15 @@ handle_client_hello(Version, #client_hello{session_id = SugesstedId,
 				   ClientHashSigns, SupportedHashSigns, Cert,TLSVersion),
 	    ECCCurve = ssl_handshake:select_curve(Curves, ssl_handshake:supported_ecc(TLSVersion)),
 	    {Type, #session{cipher_suite = CipherSuite} = Session1}
-		= ssl_handshake:select_session(SugesstedId, CipherSuites, AvailableHashSigns, Compressions,
+		= ssl_handshake:select_session(SugesstedId, CipherSuites, 
+                                               AvailableHashSigns, Compressions,
 					       Port, Session0#session{ecc = ECCCurve}, TLSVersion,
 					       SslOpts, Cache, CacheCb, Cert),
 	    case CipherSuite of
 		no_suite ->
 		    ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY);
 		_ ->
-		    {KeyExAlg,_,_,_} = ssl_cipher:suite_definition(CipherSuite),
+		    #{key_exchange := KeyExAlg} = ssl_cipher:suite_definition(CipherSuite),
 		    case ssl_handshake:select_hashsign(ClientHashSigns, Cert, KeyExAlg, 
 						       SupportedHashSigns, TLSVersion) of
 			#alert{} = Alert ->
@@ -190,7 +211,8 @@ handle_client_hello_extensions(Version, Type, Random, CipherSuites,
 			HelloExt, SslOpts, Session0, ConnectionStates0, Renegotiation, HashSign) ->
     try ssl_handshake:handle_client_hello_extensions(dtls_record, Random, CipherSuites,
 						     HelloExt, dtls_v1:corresponding_tls_version(Version),
-						     SslOpts, Session0, ConnectionStates0, Renegotiation) of
+						     SslOpts, Session0, 
+                                                     ConnectionStates0, Renegotiation) of
 	#alert{} = Alert ->
 	    Alert;
 	{Session, ConnectionStates, Protocol, ServerHelloExt} ->
@@ -212,7 +234,7 @@ handle_server_hello_extensions(Version, SessionId, Random, CipherSuite,
     end.
 
 
-%%%%%%%  Encodeing   %%%%%%%%%%%%%
+%%--------------------------------------------------------------------
 
 enc_handshake(#hello_verify_request{protocol_version = {Major, Minor},
  				       cookie = Cookie}, _Version) ->
@@ -220,7 +242,6 @@ enc_handshake(#hello_verify_request{protocol_version = {Major, Minor},
     {?HELLO_VERIFY_REQUEST, <<?BYTE(Major), ?BYTE(Minor),
  			      ?BYTE(CookieLength),
  			      Cookie:CookieLength/binary>>};
-
 enc_handshake(#hello_request{}, _Version) ->
     {?HELLO_REQUEST, <<>>};
 enc_handshake(#client_hello{client_version = {Major, Minor},
@@ -243,19 +264,29 @@ enc_handshake(#client_hello{client_version = {Major, Minor},
 		      ?BYTE(CookieLength), Cookie/binary,
 		      ?UINT16(CsLength), BinCipherSuites/binary,
  		      ?BYTE(CmLength), BinCompMethods/binary, ExtensionsBin/binary>>};
-
 enc_handshake(#server_hello{} = HandshakeMsg, Version) ->
     {Type, <<?BYTE(Major), ?BYTE(Minor), Rest/binary>>} = 
 	ssl_handshake:encode_handshake(HandshakeMsg, Version),
     {DTLSMajor, DTLSMinor} = dtls_v1:corresponding_dtls_version({Major, Minor}),
     {Type,  <<?BYTE(DTLSMajor), ?BYTE(DTLSMinor), Rest/binary>>};
-
 enc_handshake(HandshakeMsg, Version) ->
     ssl_handshake:encode_handshake(HandshakeMsg, dtls_v1:corresponding_tls_version(Version)).
 
+handshake_bin(#handshake_fragment{
+		 type = Type,
+		 length = Len, 
+		 message_seq = Seq,
+		 fragment_length = Len,
+		 fragment_offset = 0,
+		 fragment = Fragment}) ->	    
+    handshake_bin(Type, Len, Seq, Fragment).
+handshake_bin(Type, Length, Seq, FragmentData) -> 
+    <<?BYTE(Type), ?UINT24(Length),
+      ?UINT16(Seq), ?UINT24(0), ?UINT24(Length),
+      FragmentData:Length/binary>>.  
+  
 bin_fragments(Bin, Size) ->
      bin_fragments(Bin, size(Bin), Size, 0, []).
-
 bin_fragments(Bin, BinSize,  FragSize, Offset, Fragments) ->
     case (BinSize - Offset - FragSize)  > 0 of
 	true ->
@@ -279,7 +310,7 @@ address_to_bin({A,B,C,D}, Port) ->
 address_to_bin({A,B,C,D,E,F,G,H}, Port) ->
     <<A:16,B:16,C:16,D:16,E:16,F:16,G:16,H:16,Port:16>>.
 
-%%%%%%%  Decodeing   %%%%%%%%%%%%%
+%%--------------------------------------------------------------------
 
 handle_fragments(Version, FragmentData, Buffers0, Acc) ->
     Fragments = decode_handshake_fragments(FragmentData),
@@ -322,7 +353,6 @@ decode_handshake(_Version, ?CLIENT_HELLO, <<?UINT24(_), ?UINT16(_),
        compression_methods = Comp_methods,
        extensions = DecodedExtensions
       };
-
 decode_handshake(_Version, ?HELLO_VERIFY_REQUEST, <<?UINT24(_), ?UINT16(_),
 						    ?UINT24(_),  ?UINT24(_),
 						    ?BYTE(Major), ?BYTE(Minor),
@@ -330,7 +360,6 @@ decode_handshake(_Version, ?HELLO_VERIFY_REQUEST, <<?UINT24(_), ?UINT16(_),
 						    Cookie:CookieLength/binary>>) ->
     #hello_verify_request{protocol_version = {Major, Minor},
 			  cookie = Cookie};
-
 decode_handshake(Version, Tag,  <<?UINT24(_), ?UINT16(_),
 				  ?UINT24(_),  ?UINT24(_), Msg/binary>>) -> 
     %% DTLS specifics stripped
@@ -370,9 +399,10 @@ reassemble(Version,  #handshake_fragment{message_seq = Seq} = Fragment,
     end;
 reassemble(_,  #handshake_fragment{message_seq = FragSeq} = Fragment, 
 	   #protocol_buffers{dtls_handshake_next_seq = Seq,
-			     dtls_handshake_later_fragments = LaterFragments} = Buffers0) when FragSeq > Seq-> 
-     {more_data,
-      Buffers0#protocol_buffers{dtls_handshake_later_fragments = [Fragment | LaterFragments]}};
+			     dtls_handshake_later_fragments = LaterFragments} 
+           = Buffers0) when FragSeq > Seq-> 
+    {more_data,
+     Buffers0#protocol_buffers{dtls_handshake_later_fragments = [Fragment | LaterFragments]}};
 reassemble(_, _, Buffers) -> 
     %% Disregard fragments FragSeq < Seq
     {more_data, Buffers}.
@@ -396,26 +426,6 @@ merge_fragment(Frag0, [Frag1 | Rest]) ->
 	Frag ->
 	    merge_fragment(Frag, Rest)
     end.
-
-is_complete_handshake(#handshake_fragment{length = Length, fragment_length = Length}) ->
-    true;
-is_complete_handshake(_) ->
-    false.
-
-next_fragments(LaterFragments) ->
-    case lists:keysort(#handshake_fragment.message_seq, LaterFragments) of
-	[] ->
-	    {[], []}; 
-	[#handshake_fragment{message_seq = Seq} | _] = Fragments ->
-	    split_frags(Fragments, Seq, [])
-    end.
-
-split_frags([#handshake_fragment{message_seq = Seq} = Frag | Rest], Seq, Acc) ->
-    split_frags(Rest, Seq, [Frag | Acc]);
-split_frags(Frags, _, Acc) ->
-    {lists:reverse(Acc), Frags}.
-
-
 %% Duplicate
 merge_fragments(#handshake_fragment{
 		   fragment_offset = PreviousOffSet, 
@@ -486,17 +496,26 @@ merge_fragments(#handshake_fragment{
 %% No merge there is a gap
 merge_fragments(Previous, Current) ->
     [Previous, Current].
-	    
-handshake_bin(#handshake_fragment{
-		 type = Type,
-		 length = Len, 
-		 message_seq = Seq,
-		 fragment_length = Len,
-		 fragment_offset = 0,
-		 fragment = Fragment}) ->	    
-    handshake_bin(Type, Len, Seq, Fragment).
 
-handshake_bin(Type, Length, Seq, FragmentData) -> 
-    <<?BYTE(Type), ?UINT24(Length),
-      ?UINT16(Seq), ?UINT24(0), ?UINT24(Length),
-      FragmentData:Length/binary>>.  
+next_fragments(LaterFragments) ->
+    case lists:keysort(#handshake_fragment.message_seq, LaterFragments) of
+	[] ->
+	    {[], []}; 
+	[#handshake_fragment{message_seq = Seq} | _] = Fragments ->
+	    split_frags(Fragments, Seq, [])
+    end.
+
+split_frags([#handshake_fragment{message_seq = Seq} = Frag | Rest], Seq, Acc) ->
+    split_frags(Rest, Seq, [Frag | Acc]);
+split_frags(Frags, _, Acc) ->
+    {lists:reverse(Acc), Frags}.
+
+is_complete_handshake(#handshake_fragment{length = Length, fragment_length = Length}) ->
+    true;
+is_complete_handshake(_) ->
+    false.
+
+
+
+
+	    
diff --git a/lib/ssl/src/dtls_record.erl b/lib/ssl/src/dtls_record.erl
index a8520717e5..2938fd460f 100644
--- a/lib/ssl/src/dtls_record.erl
+++ b/lib/ssl/src/dtls_record.erl
@@ -30,15 +30,17 @@
 -include("ssl_cipher.hrl").
 
 %% Handling of incoming data
--export([get_dtls_records/2,  init_connection_states/2, empty_connection_state/1]).
+-export([get_dtls_records/3,  init_connection_states/2, empty_connection_state/1]).
 
-%% Decoding
--export([decode_cipher_text/2]).
+-export([save_current_connection_state/2, next_epoch/2, get_connection_state_by_epoch/3, replay_detect/2,
+         init_connection_state_seq/2, current_connection_state_epoch/2]).
 
 %% Encoding
 -export([encode_handshake/4, encode_alert_record/3,
-	 encode_change_cipher_spec/3, encode_data/3]).
--export([encode_plain_text/5]).
+	 encode_change_cipher_spec/3, encode_data/3, encode_plain_text/5]).
+
+%% Decoding
+-export([decode_cipher_text/2]).
 
 %% Protocol version handling
 -export([protocol_version/1, lowest_protocol_version/1, lowest_protocol_version/2,
@@ -46,9 +48,6 @@
 	 is_higher/2, supported_protocol_versions/0,
 	 is_acceptable_version/2, hello_version/2]).
 
--export([save_current_connection_state/2, next_epoch/2, get_connection_state_by_epoch/3, replay_detect/2]).
-
--export([init_connection_state_seq/2, current_connection_state_epoch/2]).
 
 -export_type([dtls_version/0, dtls_atom_version/0]).
 
@@ -60,7 +59,7 @@
 -compile(inline).
 
 %%====================================================================
-%% Internal application API
+%%  Handling of incoming data
 %%====================================================================
 %%--------------------------------------------------------------------
 -spec init_connection_states(client | server, one_n_minus_one | zero_n | disabled) ->
@@ -86,7 +85,6 @@ init_connection_states(Role, BeastMitigation) ->
 empty_connection_state(Empty) ->    
     Empty#{epoch => undefined, replay_window => init_replay_window(?REPLAY_WINDOW_SIZE)}.
 
-
 %%--------------------------------------------------------------------
 -spec save_current_connection_state(ssl_record:connection_states(), read | write) ->
 				      ssl_record:connection_states().
@@ -137,67 +135,58 @@ set_connection_state_by_epoch(ReadState, Epoch, #{saved_read := #{epoch := Epoch
     States#{saved_read := ReadState}.
 
 %%--------------------------------------------------------------------
--spec get_dtls_records(binary(), binary()) -> {[binary()], binary()} | #alert{}.
+-spec init_connection_state_seq(dtls_version(), ssl_record:connection_states()) ->
+				       ssl_record:connection_state().
+%%
+%% Description: Copy the read sequence number to the write sequence number
+%% This is only valid for DTLS in the first client_hello
+%%--------------------------------------------------------------------
+init_connection_state_seq({254, _},
+			  #{current_read := #{epoch := 0, sequence_number := Seq},
+			    current_write := #{epoch := 0} = Write} = ConnnectionStates0) ->
+    ConnnectionStates0#{current_write => Write#{sequence_number => Seq}};
+init_connection_state_seq(_, ConnnectionStates) ->
+    ConnnectionStates.
+
+%%--------------------------------------------------------
+-spec current_connection_state_epoch(ssl_record:connection_states(), read | write) ->
+					    integer().
+%%
+%% Description: Returns the epoch the connection_state record
+%% that is currently defined as the current connection state.
+%%--------------------------------------------------------------------
+current_connection_state_epoch(#{current_read := #{epoch := Epoch}},
+			       read) ->
+    Epoch;
+current_connection_state_epoch(#{current_write := #{epoch := Epoch}},
+			       write) ->
+    Epoch.
+
+%%--------------------------------------------------------------------
+-spec get_dtls_records(binary(), [dtls_version()], binary()) -> {[binary()], binary()} | #alert{}.
 %%
 %% Description: Given old buffer and new data from UDP/SCTP, packs up a records
 %% and returns it as a list of tls_compressed binaries also returns leftover
 %% data
 %%--------------------------------------------------------------------
-get_dtls_records(Data, <<>>) ->
-    get_dtls_records_aux(Data, []);
-get_dtls_records(Data, Buffer) ->
-    get_dtls_records_aux(list_to_binary([Buffer, Data]), []).
-
-get_dtls_records_aux(<<?BYTE(?APPLICATION_DATA),?BYTE(MajVer),?BYTE(MinVer),
-		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
-		       ?UINT16(Length), Data:Length/binary, Rest/binary>>,
-		     Acc) ->
-    get_dtls_records_aux(Rest, [#ssl_tls{type = ?APPLICATION_DATA,
-					 version = {MajVer, MinVer},
-					 epoch = Epoch, sequence_number = SequenceNumber,
-					 fragment = Data} | Acc]);
-get_dtls_records_aux(<<?BYTE(?HANDSHAKE),?BYTE(MajVer),?BYTE(MinVer),
-		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
-		       ?UINT16(Length),
-		       Data:Length/binary, Rest/binary>>, Acc) when MajVer >= 128 ->
-    get_dtls_records_aux(Rest, [#ssl_tls{type = ?HANDSHAKE,
-					 version = {MajVer, MinVer},
-					 epoch = Epoch, sequence_number = SequenceNumber,
-					 fragment = Data} | Acc]);
-get_dtls_records_aux(<<?BYTE(?ALERT),?BYTE(MajVer),?BYTE(MinVer),
-		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
-		       ?UINT16(Length), Data:Length/binary,
-		       Rest/binary>>, Acc) ->
-    get_dtls_records_aux(Rest, [#ssl_tls{type = ?ALERT,
-					 version = {MajVer, MinVer},
-					 epoch = Epoch, sequence_number = SequenceNumber,
-					 fragment = Data} | Acc]);
-get_dtls_records_aux(<<?BYTE(?CHANGE_CIPHER_SPEC),?BYTE(MajVer),?BYTE(MinVer),
-		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
-		       ?UINT16(Length), Data:Length/binary, Rest/binary>>,
-		     Acc) ->
-    get_dtls_records_aux(Rest, [#ssl_tls{type = ?CHANGE_CIPHER_SPEC,
-					 version = {MajVer, MinVer},
-					 epoch = Epoch, sequence_number = SequenceNumber,
-					 fragment = Data} | Acc]);
-
-get_dtls_records_aux(<<0:1, _CT:7, ?BYTE(_MajVer), ?BYTE(_MinVer),
-		       ?UINT16(Length), _/binary>>,
-		     _Acc) when Length > ?MAX_CIPHER_TEXT_LENGTH ->
-    ?ALERT_REC(?FATAL, ?RECORD_OVERFLOW);
-
-get_dtls_records_aux(<<1:1, Length0:15, _/binary>>,_Acc)
-  when Length0 > ?MAX_CIPHER_TEXT_LENGTH ->
-    ?ALERT_REC(?FATAL, ?RECORD_OVERFLOW);
-
-get_dtls_records_aux(Data, Acc) ->
-    case size(Data) =< ?MAX_CIPHER_TEXT_LENGTH + ?INITIAL_BYTES of
-	true ->
-	    {lists:reverse(Acc), Data};
-	false ->
-	    ?ALERT_REC(?FATAL, ?UNEXPECTED_MESSAGE)
+get_dtls_records(Data, Versions, Buffer) ->
+    BinData = list_to_binary([Buffer, Data]),
+    case erlang:byte_size(BinData) of
+        N when N >= 3 ->
+            case assert_version(BinData, Versions) of
+                true ->
+                    get_dtls_records_aux(BinData, []);
+                false ->
+                    ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC)
+            end;
+        _ ->
+            get_dtls_records_aux(BinData, [])
     end.
 
+%%====================================================================
+%% Encoding DTLS records
+%%====================================================================
+
 %%--------------------------------------------------------------------
 -spec encode_handshake(iolist(), dtls_version(), integer(), ssl_record:connection_states()) ->
 			      {iolist(), ssl_record:connection_states()}.
@@ -245,11 +234,19 @@ encode_plain_text(Type, Version, Epoch, Data, ConnectionStates) ->
     {CipherText, Write} = encode_dtls_cipher_text(Type, Version, CipherFragment, Write1),
     {CipherText, set_connection_state_by_epoch(Write, Epoch, ConnectionStates, write)}.
 
+%%====================================================================
+%% Decoding 
+%%====================================================================
 
 decode_cipher_text(#ssl_tls{epoch = Epoch} = CipherText, ConnnectionStates0) ->
     ReadState = get_connection_state_by_epoch(Epoch, ConnnectionStates0, read),
     decode_cipher_text(CipherText, ReadState, ConnnectionStates0).
 
+
+%%====================================================================
+%% Protocol version handling
+%%====================================================================
+
 %%--------------------------------------------------------------------
 -spec protocol_version(dtls_atom_version() | dtls_version()) ->
 			      dtls_version() | dtls_atom_version().
@@ -381,35 +378,6 @@ supported_protocol_versions([_|_] = Vsns) ->
 is_acceptable_version(Version, Versions) ->
     lists:member(Version, Versions).
 
-
-%%--------------------------------------------------------------------
--spec init_connection_state_seq(dtls_version(), ssl_record:connection_states()) ->
-				       ssl_record:connection_state().
-%%
-%% Description: Copy the read sequence number to the write sequence number
-%% This is only valid for DTLS in the first client_hello
-%%--------------------------------------------------------------------
-init_connection_state_seq({254, _},
-			  #{current_read := #{epoch := 0, sequence_number := Seq},
-			    current_write := #{epoch := 0} = Write} = ConnnectionStates0) ->
-    ConnnectionStates0#{current_write => Write#{sequence_number => Seq}};
-init_connection_state_seq(_, ConnnectionStates) ->
-    ConnnectionStates.
-
-%%--------------------------------------------------------
--spec current_connection_state_epoch(ssl_record:connection_states(), read | write) ->
-					    integer().
-%%
-%% Description: Returns the epoch the connection_state record
-%% that is currently defined as the current connection state.
-%%--------------------------------------------------------------------
-current_connection_state_epoch(#{current_read := #{epoch := Epoch}},
-			       read) ->
-    Epoch;
-current_connection_state_epoch(#{current_write := #{epoch := Epoch}},
-			       write) ->
-    Epoch.
-
 -spec hello_version(dtls_version(), [dtls_version()]) -> dtls_version().
 hello_version(Version, Versions) ->
     case dtls_v1:corresponding_tls_version(Version) of
@@ -437,16 +405,91 @@ initial_connection_state(ConnectionEnd, BeastMitigation) ->
       client_verify_data => undefined,
       server_verify_data => undefined
      }.
+assert_version(<<?BYTE(_), ?BYTE(MajVer), ?BYTE(MinVer), _/binary>>, Versions) ->
+    is_acceptable_version({MajVer, MinVer}, Versions).
 
-lowest_list_protocol_version(Ver, []) ->
-    Ver;
-lowest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
-    lowest_list_protocol_version(lowest_protocol_version(Ver1, Ver2), Rest).
+get_dtls_records_aux(<<?BYTE(?APPLICATION_DATA),?BYTE(MajVer),?BYTE(MinVer),
+		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
+		       ?UINT16(Length), Data:Length/binary, Rest/binary>>,
+		     Acc) ->
+    get_dtls_records_aux(Rest, [#ssl_tls{type = ?APPLICATION_DATA,
+					 version = {MajVer, MinVer},
+					 epoch = Epoch, sequence_number = SequenceNumber,
+					 fragment = Data} | Acc]);
+get_dtls_records_aux(<<?BYTE(?HANDSHAKE),?BYTE(MajVer),?BYTE(MinVer),
+		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
+		       ?UINT16(Length),
+		       Data:Length/binary, Rest/binary>>, Acc) when MajVer >= 128 ->
+    get_dtls_records_aux(Rest, [#ssl_tls{type = ?HANDSHAKE,
+					 version = {MajVer, MinVer},
+					 epoch = Epoch, sequence_number = SequenceNumber,
+					 fragment = Data} | Acc]);
+get_dtls_records_aux(<<?BYTE(?ALERT),?BYTE(MajVer),?BYTE(MinVer),
+		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
+		       ?UINT16(Length), Data:Length/binary,
+		       Rest/binary>>, Acc) ->
+    get_dtls_records_aux(Rest, [#ssl_tls{type = ?ALERT,
+					 version = {MajVer, MinVer},
+					 epoch = Epoch, sequence_number = SequenceNumber,
+					 fragment = Data} | Acc]);
+get_dtls_records_aux(<<?BYTE(?CHANGE_CIPHER_SPEC),?BYTE(MajVer),?BYTE(MinVer),
+		       ?UINT16(Epoch), ?UINT48(SequenceNumber),
+		       ?UINT16(Length), Data:Length/binary, Rest/binary>>,
+		     Acc) ->
+    get_dtls_records_aux(Rest, [#ssl_tls{type = ?CHANGE_CIPHER_SPEC,
+					 version = {MajVer, MinVer},
+					 epoch = Epoch, sequence_number = SequenceNumber,
+					 fragment = Data} | Acc]);
+get_dtls_records_aux(<<?BYTE(_), ?BYTE(_MajVer), ?BYTE(_MinVer),
+		       ?UINT16(Length), _/binary>>,
+		     _Acc) when Length > ?MAX_CIPHER_TEXT_LENGTH ->
+    ?ALERT_REC(?FATAL, ?RECORD_OVERFLOW);
 
-highest_list_protocol_version(Ver, []) ->
-    Ver;
-highest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
-    highest_list_protocol_version(highest_protocol_version(Ver1, Ver2), Rest).
+get_dtls_records_aux(Data, Acc) ->
+    case size(Data) =< ?MAX_CIPHER_TEXT_LENGTH + ?INITIAL_BYTES of
+	true ->
+	    {lists:reverse(Acc), Data};
+	false ->
+	    ?ALERT_REC(?FATAL, ?UNEXPECTED_MESSAGE)
+    end.
+%%--------------------------------------------------------------------
+
+init_replay_window(Size) ->
+    #{size => Size,
+      top => Size,
+      bottom => 0,
+      mask => 0 bsl 64
+     }.
+
+replay_detect(#ssl_tls{sequence_number = SequenceNumber}, #{replay_window := Window}) ->
+    is_replay(SequenceNumber, Window).
+
+
+is_replay(SequenceNumber, #{bottom := Bottom}) when SequenceNumber < Bottom ->
+    true;
+is_replay(SequenceNumber, #{size := Size,
+                            top := Top,
+                            bottom := Bottom,
+                            mask :=  Mask})  when (SequenceNumber >= Bottom) andalso (SequenceNumber =< Top) ->
+    Index = (SequenceNumber rem Size),
+    (Index band Mask) == 1;
+
+is_replay(_, _) ->
+    false.
+
+update_replay_window(SequenceNumber,  #{replay_window := #{size := Size,
+                                                           top := Top,
+                                                           bottom := Bottom,
+                                                           mask :=  Mask0} = Window0} = ConnectionStates) ->
+    NoNewBits = SequenceNumber - Top,
+    Index = SequenceNumber rem Size,
+    Mask = (Mask0 bsl NoNewBits) bor Index,
+    Window =  Window0#{top => SequenceNumber,
+                       bottom => Bottom + NoNewBits,
+                       mask => Mask},
+    ConnectionStates#{replay_window := Window}.
+
+%%--------------------------------------------------------------------
 
 encode_dtls_cipher_text(Type, {MajVer, MinVer}, Fragment, 
 		       #{epoch := Epoch, sequence_number := Seq} = WriteState) ->
@@ -490,6 +533,7 @@ encode_plain_text(Type, Version, Fragment, #{compression_state := CompS0,
 	ssl_cipher:cipher(BulkCipherAlgo, CipherS0, MAC, Fragment, TLSVersion),
     {CipherFragment,  WriteState0#{cipher_state => CipherS1}}.
 
+%%--------------------------------------------------------------------
 decode_cipher_text(#ssl_tls{type = Type, version = Version,
 			    epoch = Epoch,
 			    sequence_number = Seq,
@@ -541,6 +585,7 @@ decode_cipher_text(#ssl_tls{type = Type, version = Version,
 	false ->
 	    ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC)
     end.
+%%--------------------------------------------------------------------
 
 calc_mac_hash(Type, Version, #{mac_secret := MacSecret,
 			       security_parameters := #security_parameters{mac_algorithm = MacAlg}},
@@ -549,16 +594,6 @@ calc_mac_hash(Type, Version, #{mac_secret := MacSecret,
     mac_hash(Version, MacAlg, MacSecret, Epoch, SeqNo, Type,
 	     Length, Fragment).
 
-highest_protocol_version() ->
-    highest_protocol_version(supported_protocol_versions()).
-
-lowest_protocol_version() ->
-    lowest_protocol_version(supported_protocol_versions()).
-
-sufficient_dtlsv1_2_crypto_support() ->
-    CryptoSupport = crypto:supports(),
-    proplists:get_bool(sha256, proplists:get_value(hashs, CryptoSupport)).
-
 mac_hash({Major, Minor}, MacAlg, MacSecret, Epoch, SeqNo, Type, Length, Fragment) ->
     Value = [<<?UINT16(Epoch), ?UINT48(SeqNo), ?BYTE(Type),
        ?BYTE(Major), ?BYTE(Minor), ?UINT16(Length)>>,
@@ -568,37 +603,25 @@ mac_hash({Major, Minor}, MacAlg, MacSecret, Epoch, SeqNo, Type, Length, Fragment
 calc_aad(Type, {MajVer, MinVer}, Epoch, SeqNo) ->
     <<?UINT16(Epoch), ?UINT48(SeqNo), ?BYTE(Type), ?BYTE(MajVer), ?BYTE(MinVer)>>.
 
-init_replay_window(Size) ->
-    #{size => Size,
-      top => Size,
-      bottom => 0,
-      mask => 0 bsl 64
-     }.
+%%--------------------------------------------------------------------
 
-replay_detect(#ssl_tls{sequence_number = SequenceNumber}, #{replay_window := Window}) ->
-    is_replay(SequenceNumber, Window).
+lowest_list_protocol_version(Ver, []) ->
+    Ver;
+lowest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
+    lowest_list_protocol_version(lowest_protocol_version(Ver1, Ver2), Rest).
 
+highest_list_protocol_version(Ver, []) ->
+    Ver;
+highest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
+    highest_list_protocol_version(highest_protocol_version(Ver1, Ver2), Rest).
 
-is_replay(SequenceNumber, #{bottom := Bottom}) when SequenceNumber < Bottom ->
-    true;
-is_replay(SequenceNumber, #{size := Size,
-                            top := Top,
-                            bottom := Bottom,
-                            mask :=  Mask})  when (SequenceNumber >= Bottom) andalso (SequenceNumber =< Top) ->
-    Index = (SequenceNumber rem Size),
-    (Index band Mask) == 1;
+highest_protocol_version() ->
+    highest_protocol_version(supported_protocol_versions()).
 
-is_replay(_, _) ->
-    false.
+lowest_protocol_version() ->
+    lowest_protocol_version(supported_protocol_versions()).
+
+sufficient_dtlsv1_2_crypto_support() ->
+    CryptoSupport = crypto:supports(),
+    proplists:get_bool(sha256, proplists:get_value(hashs, CryptoSupport)).
 
-update_replay_window(SequenceNumber,  #{replay_window := #{size := Size,
-                                                           top := Top,
-                                                           bottom := Bottom,
-                                                           mask :=  Mask0} = Window0} = ConnectionStates) ->
-    NoNewBits = SequenceNumber - Top,
-    Index = SequenceNumber rem Size,
-    Mask = (Mask0 bsl NoNewBits) bor Index,
-    Window =  Window0#{top => SequenceNumber,
-                       bottom => Bottom + NoNewBits,
-                       mask => Mask},
-    ConnectionStates#{replay_window := Window}.
diff --git a/lib/ssl/src/dtls_socket.erl b/lib/ssl/src/dtls_socket.erl
index 5f854fbb4b..0e4ab089dc 100644
--- a/lib/ssl/src/dtls_socket.erl
+++ b/lib/ssl/src/dtls_socket.erl
@@ -24,7 +24,7 @@
 
 -export([send/3, listen/3, accept/3, connect/4, socket/4, setopts/3, getopts/3, getstat/3, 
 	 peername/2, sockname/2, port/2, close/2]).
--export([emulated_options/0, internal_inet_values/0, default_inet_values/0, default_cb_info/0]).
+-export([emulated_options/0, emulated_options/1, internal_inet_values/0, default_inet_values/0, default_cb_info/0]).
 
 send(Transport, {{IP,Port},Socket}, Data) ->
     Transport:send(Socket, IP, Port, Data).
@@ -133,6 +133,9 @@ port(Transport, Socket) ->
 emulated_options() ->
     [mode, active,  packet, packet_size].
 
+emulated_options(Opts) ->
+      emulated_options(Opts, internal_inet_values(), default_inet_values()).
+
 internal_inet_values() ->
     [{active, false}, {mode,binary}].
 
@@ -158,3 +161,29 @@ emulated_socket_options(InetValues, #socket_options{
        packet_size = proplists:get_value(packet_size, InetValues, PacketSize),
        active = proplists:get_value(active, InetValues, Active)
       }.
+
+emulated_options([{mode, Value} = Opt |Opts], Inet, Emulated) ->
+    validate_inet_option(mode, Value),
+    emulated_options(Opts, Inet, [Opt | proplists:delete(mode, Emulated)]);
+emulated_options([{header, _} = Opt | _], _, _) ->
+    throw({error, {options, {not_supported, Opt}}});
+emulated_options([{active, Value} = Opt |Opts], Inet, Emulated) ->
+    validate_inet_option(active, Value),
+    emulated_options(Opts, Inet, [Opt | proplists:delete(active, Emulated)]);
+emulated_options([{packet, _} = Opt | _], _, _) ->
+    throw({error, {options, {not_supported, Opt}}});
+emulated_options([{packet_size, _} = Opt | _], _, _) ->
+    throw({error, {options, {not_supported, Opt}}});
+emulated_options([Opt|Opts], Inet, Emulated) ->
+    emulated_options(Opts, [Opt|Inet], Emulated);
+emulated_options([], Inet,Emulated) ->
+    {Inet, Emulated}.
+
+validate_inet_option(mode, Value)
+  when Value =/= list, Value =/= binary ->
+    throw({error, {options, {mode,Value}}});
+validate_inet_option(active, Value)
+  when Value =/= true, Value =/= false, Value =/= once ->
+    throw({error, {options, {active,Value}}});
+validate_inet_option(_, _) ->
+    ok.
diff --git a/lib/ssl/src/dtls_udp_listener.erl b/lib/ssl/src/dtls_udp_listener.erl
index c9e04767aa..0608c6bd2b 100644
--- a/lib/ssl/src/dtls_udp_listener.erl
+++ b/lib/ssl/src/dtls_udp_listener.erl
@@ -84,7 +84,7 @@ init([Port, EmOpts, InetOptions, DTLSOptions]) ->
 		    listener = Socket,
                     close = false}}
     catch _:_ ->
-	    {error, closed}
+	    {stop, {shutdown, {error, closed}}}
     end.
 handle_call({accept, _}, _, #state{close = true} = State) ->
     {reply, {error, closed}, State};
@@ -153,15 +153,18 @@ handle_info({udp_error, Socket, Error}, #state{listener = Socket} = State) ->
 
 handle_info({'DOWN', _, process, Pid, _}, #state{clients = Clients,
 						 dtls_processes = Processes0,
+                                                 dtls_msq_queues = MsgQueues0,
                                                  close = ListenClosed} = State) ->
     Client = kv_get(Pid, Processes0),
     Processes = kv_delete(Pid, Processes0),
+    MsgQueues = kv_delete(Client, MsgQueues0),
     case ListenClosed andalso kv_empty(Processes) of
         true ->
             {stop, normal, State};
         false ->
             {noreply, State#state{clients = set_delete(Client, Clients),
-                                  dtls_processes = Processes}}
+                                  dtls_processes = Processes,
+                                  dtls_msq_queues = MsgQueues}}
     end.
 
 terminate(_Reason, _State) ->
diff --git a/lib/ssl/src/dtls_v1.erl b/lib/ssl/src/dtls_v1.erl
index 51ee8ec047..0f6344b6f7 100644
--- a/lib/ssl/src/dtls_v1.erl
+++ b/lib/ssl/src/dtls_v1.erl
@@ -21,7 +21,7 @@
 
 -include("ssl_cipher.hrl").
 
--export([suites/1, all_suites/1, hmac_hash/3, ecc_curves/1, 
+-export([suites/1, all_suites/1, anonymous_suites/1,hmac_hash/3, ecc_curves/1, 
          corresponding_tls_version/1, corresponding_dtls_version/1,
          cookie_secret/0, cookie_timeout/0]).
 
@@ -40,6 +40,12 @@ all_suites(Version) ->
                  end,
                  ssl_cipher:all_suites(corresponding_tls_version(Version))).
 
+anonymous_suites(Version) ->
+    lists:filter(fun(Cipher) -> 
+                         is_acceptable_cipher(ssl_cipher:suite_definition(Cipher)) 
+                 end, 
+                 ssl_cipher:anonymous_suites(corresponding_tls_version(Version))).
+                 
 hmac_hash(MacAlg, MacSecret, Value) ->
     tls_v1:hmac_hash(MacAlg, MacSecret, Value).
 
diff --git a/lib/ssl/src/inet_tls_dist.erl b/lib/ssl/src/inet_tls_dist.erl
index d644cbe66a..8e605bec65 100644
--- a/lib/ssl/src/inet_tls_dist.erl
+++ b/lib/ssl/src/inet_tls_dist.erl
@@ -324,12 +324,13 @@ do_accept(Driver, Kernel, AcceptPid, DistCtrl, MyNode, Allowed, SetupTime) ->
                           timer = Timer,
                           this_flags = 0,
                           allowed = Allowed},
+                    link(DistCtrl),
 		    dist_util:handshake_other_started(trace(HSData));
 		{false,IP} ->
 		    error_logger:error_msg(
                       "** Connection attempt from "
                       "disallowed IP ~w ** ~n", [IP]),
-		    ?shutdown(trace(no_node))
+		    ?shutdown2(no_node, trace({disallowed, IP}))
 	    end
     end.
 
@@ -357,10 +358,14 @@ do_setup(Driver, Kernel, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
 	    ErlEpmd = net_kernel:epmd_module(),
 	    case ErlEpmd:port_please(Name, Ip) of
 		{port, TcpPort, Version} ->
-                    Opts = trace(connect_options(get_ssl_options(client))),
+                    Opts =
+                        trace(
+                          connect_options(
+                            [{server_name_indication, atom_to_list(Node)}
+                             |get_ssl_options(client)])),
 		    dist_util:reset_timer(Timer),
                     case ssl:connect(
-                           Ip, TcpPort,
+                           Address, TcpPort,
                            [binary, {active, false}, {packet, 4},
                             Driver:family(), nodelay()] ++ Opts,
                            net_kernel:connecttime()) of
@@ -378,21 +383,26 @@ do_setup(Driver, Kernel, Node, Type, MyNode, LongOrShortNames, SetupTime) ->
                                   this_flags = 0,
                                   other_version = Version,
                                   request_type = Type},
+                            link(DistCtrl),
 			    dist_util:handshake_we_started(trace(HSData));
 			Other ->
 			    %% Other Node may have closed since 
 			    %% port_please !
 			    ?shutdown2(
                                Node,
-                               trace({shutdown, {connect_failed, Other}}))
+                               trace(
+                                 {ssl_connect_failed, Ip, TcpPort, Other}))
 		    end;
 		Other ->
 		    ?shutdown2(
                        Node,
-                       trace({shutdown, {port_please_failed, Other}}))
+                       trace(
+                         {port_please_failed, ErlEpmd, Name, Ip, Other}))
 	    end;
 	Other ->
-	    ?shutdown2(Node, trace({shutdown, {getaddr_failed, Other}}))
+	    ?shutdown2(
+               Node,
+               trace({getaddr_failed, Driver, Address, Other}))
     end.
 
 close(Socket) ->
@@ -411,8 +421,9 @@ check_ip(Driver, SslSocket) ->
 	    case get_ifs(SslSocket) of
 		{ok, IFs, IP} ->
 		    check_ip(Driver, IFs, IP);
-		_ ->
-		    ?shutdown(no_node)
+		Other ->
+		    ?shutdown2(
+                       no_node, trace({check_ip_failed, SslSocket, Other}))
 	    end;
 	_ ->
 	    true
@@ -441,23 +452,22 @@ get_ifs(#sslsocket{fd = {gen_tcp, Socket, _}}) ->
 
 %% If Node is illegal terminate the connection setup!!
 splitnode(Driver, Node, LongOrShortNames) ->
-    case split_node(atom_to_list(Node), $@, []) of
-	[Name|Tail] when Tail =/= [] ->
-	    Host = lists:append(Tail),
+    case string:split(atom_to_list(Node), "@") of
+	[Name, Host] when Host =/= [] ->
 	    check_node(Driver, Name, Node, Host, LongOrShortNames);
 	[_] ->
 	    error_logger:error_msg(
               "** Nodename ~p illegal, no '@' character **~n",
               [Node]),
-	    ?shutdown(Node);
+	    ?shutdown2(Node, trace({illegal_node_n@me, Node}));
 	_ ->
 	    error_logger:error_msg(
               "** Nodename ~p illegal **~n", [Node]),
-	    ?shutdown(Node)
+	    ?shutdown2(Node, trace({illegal_node_name, Node}))
     end.
 
 check_node(Driver, Name, Node, Host, LongOrShortNames) ->
-    case split_node(Host, $., []) of
+    case string:split(Host, ".") of
 	[_] when LongOrShortNames == longnames ->
 	    case Driver:parse_address(Host) of
 		{ok, _} ->
@@ -468,35 +478,28 @@ check_node(Driver, Name, Node, Host, LongOrShortNames) ->
                       "fully qualified hostnames **~n"
                       "** Hostname ~s is illegal **~n",
                       [Host]),
-		    ?shutdown(Node)
+		    ?shutdown2(Node, trace({not_longnames, Host}))
 	    end;
-	[_, _ | _] when LongOrShortNames == shortnames ->
+	[_, _] when LongOrShortNames == shortnames ->
 	    error_logger:error_msg(
               "** System NOT running to use "
               "fully qualified hostnames **~n"
               "** Hostname ~s is illegal **~n",
               [Host]),
-	    ?shutdown(Node);
+	    ?shutdown2(Node, trace({not_shortnames, Host}));
 	_ ->
 	    [Name, Host]
     end.
 
 split_node(Node) when is_atom(Node) ->
-    case split_node(atom_to_list(Node), $@, []) of
-        [_, Host] ->
+    case string:split(atom_to_list(Node), "@") of
+        [Name, Host] when Name =/= [], Host =/= [] ->
             Host;
         _ ->
             false
     end;
 split_node(_) ->
     false.
-%%
-split_node([Chr|T], Chr, Ack) -> 
-    [lists:reverse(Ack)|split_node(T, Chr, [])];
-split_node([H|T], Chr, Ack) -> 
-    split_node(T, Chr, [H|Ack]);
-split_node([], _, Ack) -> 
-    [lists:reverse(Ack)].
 
 %% -------------------------------------------------------------------------
 
@@ -524,6 +527,17 @@ nodelay() ->
 
 
 get_ssl_options(Type) ->
+    try ets:lookup(ssl_dist_opts, Type) of
+        [{Type, Opts}] ->
+            [{erl_dist, true} | Opts];
+        _ ->
+            get_ssl_dist_arguments(Type)
+    catch
+        error:badarg ->
+            get_ssl_dist_arguments(Type)
+    end.
+
+get_ssl_dist_arguments(Type) ->
     case init:get_argument(ssl_dist_opt) of
 	{ok, Args} ->
 	    [{erl_dist, true} | ssl_options(Type, lists:append(Args))];
diff --git a/lib/ssl/src/ssl.app.src b/lib/ssl/src/ssl.app.src
index c5b55641a1..2aecb6836e 100644
--- a/lib/ssl/src/ssl.app.src
+++ b/lib/ssl/src/ssl.app.src
@@ -9,7 +9,6 @@
 	       tls_socket,
 	       tls_v1,
 	       ssl_v3,
-	       ssl_v2,
 	       tls_connection_sup,
 	       %% DTLS
 	       dtls_connection,
@@ -62,5 +61,5 @@
     {applications, [crypto, public_key, kernel, stdlib]},
     {env, []},
     {mod, {ssl_app, []}},
-    {runtime_dependencies, ["stdlib-3.2","public_key-1.5","kernel-6.0",
-			    "erts-10.0","crypto-3.3", "inets-5.10.7"]}]}.
+    {runtime_dependencies, ["stdlib-3.5","public_key-1.5","kernel-6.0",
+			    "erts-10.0","crypto-4.2", "inets-5.10.7"]}]}.
diff --git a/lib/ssl/src/ssl.appup.src b/lib/ssl/src/ssl.appup.src
index bfdd0c205b..4ad2a2f1fd 100644
--- a/lib/ssl/src/ssl.appup.src
+++ b/lib/ssl/src/ssl.appup.src
@@ -1,6 +1,7 @@
 %% -*- erlang -*-
 {"%VSN%",
  [
+  {<<"8.2.4">>, [{load_module, ssl_cipher, soft_purge, soft_purge, []}]},
   {<<"8\\..*">>, [{restart_application, ssl}]},
   {<<"7\\..*">>, [{restart_application, ssl}]},
   {<<"6\\..*">>, [{restart_application, ssl}]},
@@ -9,6 +10,7 @@
   {<<"3\\..*">>, [{restart_application, ssl}]}
  ], 
  [
+  {<<"8.2.4">>, [{load_module, ssl_cipher, soft_purge, soft_purge, []}]},
   {<<"8\\..*">>, [{restart_application, ssl}]},
   {<<"7\\..*">>, [{restart_application, ssl}]},
   {<<"6\\..*">>, [{restart_application, ssl}]},
diff --git a/lib/ssl/src/ssl.erl b/lib/ssl/src/ssl.erl
index 62da498e76..4efd13a6fa 100644
--- a/lib/ssl/src/ssl.erl
+++ b/lib/ssl/src/ssl.erl
@@ -39,7 +39,9 @@
 	]).
 %% SSL/TLS protocol handling
 
--export([cipher_suites/0, cipher_suites/1, eccs/0, eccs/1, versions/0, 
+-export([cipher_suites/0, cipher_suites/1, cipher_suites/2, filter_cipher_suites/2,
+         prepend_cipher_suites/2, append_cipher_suites/2,
+         eccs/0, eccs/1, versions/0, 
          format_error/1, renegotiate/1, prf/5, negotiated_protocol/1, 
 	 connection_information/1, connection_information/2]).
 %% Misc
@@ -374,25 +376,98 @@ negotiated_protocol(#sslsocket{pid = Pid}) ->
     ssl_connection:negotiated_protocol(Pid).
 
 %%--------------------------------------------------------------------
--spec cipher_suites() -> [ssl_cipher:erl_cipher_suite()] | [string()].
+-spec cipher_suites() -> [ssl_cipher:old_erl_cipher_suite()] | [string()].
 %%--------------------------------------------------------------------
 cipher_suites() ->
     cipher_suites(erlang).
 %%--------------------------------------------------------------------
--spec cipher_suites(erlang | openssl | all) -> [ssl_cipher:erl_cipher_suite()] |
-					       [string()].
+-spec cipher_suites(erlang | openssl | all) -> 
+                           [ssl_cipher:old_erl_cipher_suite() | string()].
 %% Description: Returns all supported cipher suites.
 %%--------------------------------------------------------------------
 cipher_suites(erlang) ->
     [ssl_cipher:erl_suite_definition(Suite) || Suite <- available_suites(default)];
 
 cipher_suites(openssl) ->
-    [ssl_cipher:openssl_suite_name(Suite) || Suite <- available_suites(default)];
+    [ssl_cipher:openssl_suite_name(Suite) ||
+        Suite <- available_suites(default)];
 
 cipher_suites(all) ->
     [ssl_cipher:erl_suite_definition(Suite) || Suite <- available_suites(all)].
 
 %%--------------------------------------------------------------------
+-spec cipher_suites(default | all | anonymous, tls_record:tls_version() | dtls_record:dtls_version() |
+                    tls_record:tls_atom_version() |  dtls_record:dtls_atom_version()) -> 
+                           [ssl_cipher:erl_cipher_suite()].
+%% Description: Returns all default and all supported cipher suites for a
+%% TLS/DTLS version
+%%--------------------------------------------------------------------
+cipher_suites(Base, Version) when Version == 'tlsv1.2';
+                                  Version == 'tlsv1.1';
+                                  Version == tlsv1;
+                                  Version == sslv3 ->
+    cipher_suites(Base, tls_record:protocol_version(Version));
+cipher_suites(Base, Version)  when Version == 'dtlsv1.2';
+                                   Version == 'dtlsv1'->
+    cipher_suites(Base, dtls_record:protocol_version(Version));                   
+cipher_suites(Base, Version) ->
+    [ssl_cipher:suite_definition(Suite) || Suite <- supported_suites(Base, Version)].
+
+%%--------------------------------------------------------------------
+-spec filter_cipher_suites([ssl_cipher:erl_cipher_suite()], 
+                           [{key_exchange | cipher | mac | prf, fun()}] | []) -> 
+                                  [ssl_cipher:erl_cipher_suite()].
+%% Description: Removes cipher suites if any of the filter functions returns false
+%% for any part of the cipher suite. This function also calls default filter functions
+%% to make sure the cipher suite are supported by crypto.
+%%--------------------------------------------------------------------
+filter_cipher_suites(Suites, Filters0) ->
+    #{key_exchange_filters := KexF,
+      cipher_filters := CipherF,
+      mac_filters := MacF,
+      prf_filters := PrfF}
+        = ssl_cipher:crypto_support_filters(),
+    Filters = #{key_exchange_filters => add_filter(proplists:get_value(key_exchange, Filters0), KexF),
+                cipher_filters => add_filter(proplists:get_value(cipher, Filters0), CipherF),
+                mac_filters => add_filter(proplists:get_value(mac, Filters0), MacF),
+                prf_filters => add_filter(proplists:get_value(prf, Filters0), PrfF)},
+    ssl_cipher:filter_suites(Suites, Filters).
+%%--------------------------------------------------------------------
+-spec prepend_cipher_suites([ssl_cipher:erl_cipher_suite()] | 
+                            [{key_exchange | cipher | mac | prf, fun()}],
+                            [ssl_cipher:erl_cipher_suite()]) -> 
+                                   [ssl_cipher:erl_cipher_suite()].
+%% Description: Make <Preferred> suites become the most prefered
+%%      suites that is put them at the head of the cipher suite list
+%%      and remove them from <Suites> if present. <Preferred> may be a
+%%      list of cipher suits or a list of filters in which case the
+%%      filters are use on Suites to extract the the preferred
+%%      cipher list.
+%% --------------------------------------------------------------------
+prepend_cipher_suites([First | _] = Preferred, Suites0) when is_map(First) ->
+    Suites = Preferred ++ (Suites0 -- Preferred),
+    Suites;
+prepend_cipher_suites(Filters, Suites) ->
+    Preferred = filter_cipher_suites(Suites, Filters), 
+    Preferred ++ (Suites -- Preferred).
+%%--------------------------------------------------------------------
+-spec append_cipher_suites(Deferred :: [ssl_cipher:erl_cipher_suite()] | 
+                                       [{key_exchange | cipher | mac | prf, fun()}],
+                           [ssl_cipher:erl_cipher_suite()]) -> 
+                                  [ssl_cipher:erl_cipher_suite()].
+%% Description: Make <Deferred> suites suites become the 
+%% least prefered suites that is put them at the end of the cipher suite list
+%% and removed them from <Suites> if present.
+%%
+%%--------------------------------------------------------------------
+append_cipher_suites([First | _] = Deferred, Suites0) when is_map(First)->
+    Suites = (Suites0 -- Deferred) ++ Deferred,
+    Suites;
+append_cipher_suites(Filters, Suites) ->
+    Deferred = filter_cipher_suites(Suites, Filters), 
+    (Suites -- Deferred) ++  Deferred.
+
+%%--------------------------------------------------------------------
 -spec eccs() -> tls_v1:curves().
 %% Description: returns all supported curves across all versions
 %%--------------------------------------------------------------------
@@ -411,6 +486,11 @@ eccs({3,0}) ->
 eccs({3,_}) ->
     Curves = tls_v1:ecc_curves(all),
     eccs_filter_supported(Curves);
+eccs({_,_} = DTLSVersion) ->
+    eccs(dtls_v1:corresponding_tls_version(DTLSVersion));
+eccs(DTLSAtomVersion) when DTLSAtomVersion == 'dtlsv1';
+                           DTLSAtomVersion == 'dtlsv2' ->
+    eccs(dtls_record:protocol_version(DTLSAtomVersion));
 eccs(AtomVersion) when is_atom(AtomVersion) ->
     eccs(tls_record:protocol_version(AtomVersion)).
 
@@ -543,16 +623,23 @@ sockname(#sslsocket{pid = Pid, fd = {Transport, Socket, _, _}}) when is_pid(Pid)
 
 %%---------------------------------------------------------------
 -spec versions() -> [{ssl_app, string()} | {supported, [tls_record:tls_atom_version()]} |
-		     {available, [tls_record:tls_atom_version()]}].
+                     {supported_dtls, [dtls_record:dtls_atom_version()]} |
+		     {available, [tls_record:tls_atom_version()]} |
+                     {available_dtls, [dtls_record:dtls_atom_version()]}].
 %%
 %% Description: Returns a list of relevant versions.
 %%--------------------------------------------------------------------
 versions() ->
-    Vsns = tls_record:supported_protocol_versions(),
-    SupportedVsns = [tls_record:protocol_version(Vsn) || Vsn <- Vsns],
-    AvailableVsns = ?ALL_AVAILABLE_VERSIONS,
-    %% TODO Add DTLS versions when supported
-    [{ssl_app, ?VSN}, {supported, SupportedVsns}, {available, AvailableVsns}].
+    TLSVsns = tls_record:supported_protocol_versions(),
+    DTLSVsns = dtls_record:supported_protocol_versions(),
+    SupportedTLSVsns = [tls_record:protocol_version(Vsn) || Vsn <- TLSVsns],
+    SupportedDTLSVsns = [dtls_record:protocol_version(Vsn) || Vsn <- DTLSVsns],
+    AvailableTLSVsns = ?ALL_AVAILABLE_VERSIONS,
+    AvailableDTLSVsns = ?ALL_AVAILABLE_DATAGRAM_VERSIONS,
+    [{ssl_app, ?VSN}, {supported, SupportedTLSVsns}, 
+     {supported_dtls, SupportedDTLSVsns}, 
+     {available, AvailableTLSVsns}, 
+     {available_dtls, AvailableDTLSVsns}].
 
 
 %%---------------------------------------------------------------
@@ -632,16 +719,21 @@ tls_version({254, _} = Version) ->
 %%%--------------------------------------------------------------
 %%% Internal functions
 %%%--------------------------------------------------------------------
-
 %% Possible filters out suites not supported by crypto 
 available_suites(default) ->  
     Version = tls_record:highest_protocol_version([]),			  
     ssl_cipher:filter_suites(ssl_cipher:suites(Version));
-
 available_suites(all) ->  
     Version = tls_record:highest_protocol_version([]),			  
     ssl_cipher:filter_suites(ssl_cipher:all_suites(Version)).
 
+supported_suites(default, Version) ->  
+    ssl_cipher:suites(Version);
+supported_suites(all, Version) ->  
+    ssl_cipher:all_suites(Version);
+supported_suites(anonymous, Version) -> 
+    ssl_cipher:anonymous_suites(Version).
+
 do_listen(Port, #config{transport_info = {Transport, _, _, _}} = Config, tls_connection) ->
     tls_socket:listen(Transport, Port, Config);
 
@@ -751,7 +843,7 @@ handle_options(Opts0, Role, Host) ->
 		    %% Server side option
 		    reuse_session = handle_option(reuse_session, Opts, ReuseSessionFun),
 		    reuse_sessions = handle_option(reuse_sessions, Opts, true),
-		    secure_renegotiate = handle_option(secure_renegotiate, Opts, false),
+		    secure_renegotiate = handle_option(secure_renegotiate, Opts, true),
 		    client_renegotiation = handle_option(client_renegotiation, Opts, 
 							 default_option_role(server, true, Role), 
 							 server, Role),
@@ -789,7 +881,6 @@ handle_options(Opts0, Role, Host) ->
 					     client, Role),
 		    crl_check = handle_option(crl_check, Opts, false),
 		    crl_cache = handle_option(crl_cache, Opts, {ssl_crl_cache, {internal, []}}),
-		    v2_hello_compatible = handle_option(v2_hello_compatible, Opts, false),
                     max_handshake_size = handle_option(max_handshake_size, Opts, ?DEFAULT_MAX_HANDSHAKE_SIZE)
 		   },
 
@@ -805,7 +896,7 @@ handle_options(Opts0, Role, Host) ->
 		  alpn_preferred_protocols, next_protocols_advertised,
 		  client_preferred_next_protocols, log_alert,
 		  server_name_indication, honor_cipher_order, padding_check, crl_check, crl_cache,
-		  fallback, signature_algs, eccs, honor_ecc_order, beast_mitigation, v2_hello_compatible,
+		  fallback, signature_algs, eccs, honor_ecc_order, beast_mitigation,
                   max_handshake_size],
 
     SockOpts = lists:foldl(fun(Key, PropList) ->
@@ -896,7 +987,8 @@ validate_option(key, {KeyType, Value}) when is_binary(Value),
 					    KeyType == 'ECPrivateKey';
 					    KeyType == 'PrivateKeyInfo' ->
     {KeyType, Value};
-
+validate_option(key, #{algorithm := _} = Value) ->
+    Value;
 validate_option(keyfile, undefined) ->
    <<>>;
 validate_option(keyfile, Value) when is_binary(Value) ->
@@ -991,19 +1083,23 @@ validate_option(next_protocols_advertised, Value) when is_list(Value) ->
     Value;
 validate_option(next_protocols_advertised, undefined) ->
     undefined;
-validate_option(server_name_indication = Opt, Value) when is_list(Value) ->
+validate_option(server_name_indication, Value) when is_list(Value) ->
     %% RFC 6066, Section 3: Currently, the only server names supported are
     %% DNS hostnames
-     case inet_parse:domain(Value) of
-        false -> 
-           throw({error, {options, {{Opt, Value}}}});
-        true -> 
-            Value
-     end;
-validate_option(server_name_indication, undefined = Value) ->
+    %% case inet_parse:domain(Value) of
+    %%     false ->
+    %%         throw({error, {options, {{Opt, Value}}}});
+    %%     true ->
+    %%         Value
+    %% end;
+    %%
+    %% But the definition seems very diffuse, so let all strings through
+    %% and leave it up to public_key to decide...
     Value;
-validate_option(server_name_indication, disable) ->
+validate_option(server_name_indication, undefined) ->
     undefined;
+validate_option(server_name_indication, disable) ->
+    disable;
 
 validate_option(sni_hosts, []) ->
     [];
@@ -1037,8 +1133,6 @@ validate_option(beast_mitigation, Value) when Value == one_n_minus_one orelse
                                               Value == zero_n orelse
                                               Value == disabled ->
   Value;
-validate_option(v2_hello_compatible, Value) when is_boolean(Value)  ->
-    Value;
 validate_option(max_handshake_size, Value) when is_integer(Value)  andalso Value =< ?MAX_UNIT24 ->
     Value;
 validate_option(protocol, Value = tls) ->
@@ -1113,24 +1207,6 @@ dtls_validate_versions([Version | Rest], Versions) when  Version == 'dtlsv1';
 dtls_validate_versions([Ver| _], Versions) ->
     throw({error, {options, {Ver, {versions, Versions}}}}).
 
-validate_inet_option(mode, Value)
-  when Value =/= list, Value =/= binary ->
-    throw({error, {options, {mode,Value}}});
-validate_inet_option(packet, Value)
-  when not (is_atom(Value) orelse is_integer(Value)) ->
-    throw({error, {options, {packet,Value}}});
-validate_inet_option(packet_size, Value)
-  when not is_integer(Value) ->
-    throw({error, {options, {packet_size,Value}}});
-validate_inet_option(header, Value)
-  when not is_integer(Value) ->
-    throw({error, {options, {header,Value}}});
-validate_inet_option(active, Value)
-  when Value =/= true, Value =/= false, Value =/= once ->
-    throw({error, {options, {active,Value}}});
-validate_inet_option(_, _) ->
-    ok.
-
 %% The option cacerts overrides cacertsfile
 ca_cert_default(_,_, [_|_]) ->
     undefined;
@@ -1145,31 +1221,11 @@ ca_cert_default(verify_peer, undefined, _) ->
 emulated_options(Protocol, Opts) ->
     case Protocol of
 	tls ->
-	    emulated_options(Opts, tls_socket:internal_inet_values(), tls_socket:default_inet_values());
+	    tls_socket:emulated_options(Opts);
 	dtls ->
-	    emulated_options(Opts, dtls_socket:internal_inet_values(), dtls_socket:default_inet_values())
+	    dtls_socket:emulated_options(Opts)
     end.
 
-emulated_options([{mode, Value} = Opt |Opts], Inet, Emulated) ->
-    validate_inet_option(mode, Value),
-    emulated_options(Opts, Inet, [Opt | proplists:delete(mode, Emulated)]);
-emulated_options([{header, Value} = Opt | Opts], Inet, Emulated) ->
-    validate_inet_option(header, Value),
-    emulated_options(Opts, Inet,  [Opt | proplists:delete(header, Emulated)]);
-emulated_options([{active, Value} = Opt |Opts], Inet, Emulated) ->
-    validate_inet_option(active, Value),
-    emulated_options(Opts, Inet, [Opt | proplists:delete(active, Emulated)]);
-emulated_options([{packet, Value} = Opt |Opts], Inet, Emulated) ->
-    validate_inet_option(packet, Value),
-    emulated_options(Opts, Inet, [Opt | proplists:delete(packet, Emulated)]);
-emulated_options([{packet_size, Value} = Opt | Opts], Inet, Emulated) ->
-    validate_inet_option(packet_size, Value),
-    emulated_options(Opts, Inet, [Opt | proplists:delete(packet_size, Emulated)]);
-emulated_options([Opt|Opts], Inet, Emulated) ->
-    emulated_options(Opts, [Opt|Inet], Emulated);
-emulated_options([], Inet,Emulated) ->
-    {Inet, Emulated}.
-
 handle_cipher_option(Value, Version)  when is_list(Value) ->
     try binary_cipher_suites(Version, Value) of
 	Suites ->
@@ -1184,18 +1240,21 @@ handle_cipher_option(Value, Version)  when is_list(Value) ->
 binary_cipher_suites(Version, []) -> 
     %% Defaults to all supported suites that does
     %% not require explicit configuration
-    ssl_cipher:filter_suites(ssl_cipher:suites(tls_version(Version)));
-binary_cipher_suites(Version, [Tuple|_] = Ciphers0) when is_tuple(Tuple) ->
+    default_binary_suites(Version);
+binary_cipher_suites(Version, [Map|_] = Ciphers0) when is_map(Map) ->
     Ciphers = [ssl_cipher:suite(C) || C <- Ciphers0],
     binary_cipher_suites(Version, Ciphers);
-
+binary_cipher_suites(Version, [Tuple|_] = Ciphers0) when is_tuple(Tuple) ->
+    Ciphers = [ssl_cipher:suite(tuple_to_map(C)) || C <- Ciphers0],
+    binary_cipher_suites(Version, Ciphers);
 binary_cipher_suites(Version, [Cipher0 | _] = Ciphers0) when is_binary(Cipher0) ->
-    All = ssl_cipher:all_suites(tls_version(Version)),
+    All = ssl_cipher:all_suites(Version) ++ 
+        ssl_cipher:anonymous_suites(Version),
     case [Cipher || Cipher <- Ciphers0, lists:member(Cipher, All)] of
 	[] ->
 	    %% Defaults to all supported suites that does
 	    %% not require explicit configuration
-	    ssl_cipher:filter_suites(ssl_cipher:suites(tls_version(Version)));
+	    default_binary_suites(Version);
 	Ciphers ->
 	    Ciphers
     end;
@@ -1208,6 +1267,30 @@ binary_cipher_suites(Version, Ciphers0)  ->
     Ciphers = [ssl_cipher:openssl_suite(C) || C <- string:lexemes(Ciphers0, ":")],
     binary_cipher_suites(Version, Ciphers).
 
+default_binary_suites(Version) ->
+    ssl_cipher:filter_suites(ssl_cipher:suites(Version)).
+
+tuple_to_map({Kex, Cipher, Mac}) ->
+    #{key_exchange => Kex,
+      cipher => Cipher,
+      mac => Mac,
+      prf => default_prf};
+tuple_to_map({Kex, Cipher, Mac, Prf}) ->
+    #{key_exchange => Kex,
+      cipher => Cipher,
+      mac => tuple_to_map_mac(Cipher, Mac),
+      prf => Prf}.
+
+%% Backwards compatible
+tuple_to_map_mac(aes_128_gcm, _) -> 
+    aead;
+tuple_to_map_mac(aes_256_gcm, _) -> 
+    aead;
+tuple_to_map_mac(chacha20_poly1305, _) ->
+    aead;
+tuple_to_map_mac(_, MAC) ->
+    MAC.
+
 handle_eccs_option(Value, Version) when is_list(Value) ->
     {_Major, Minor} = tls_version(Version),
     try tls_v1:ecc_curves(Minor, Value) of
@@ -1486,3 +1569,8 @@ reject_alpn_next_prot_options([Opt| AlpnNextOpts], Opts) ->
         false ->
             reject_alpn_next_prot_options(AlpnNextOpts, Opts)
     end.
+
+add_filter(undefined, Filters) ->
+    Filters;
+add_filter(Filter, Filters) ->
+    [Filter | Filters].
diff --git a/lib/ssl/src/ssl_alert.erl b/lib/ssl/src/ssl_alert.erl
index 95ab955ad0..fc7b1e6d1c 100644
--- a/lib/ssl/src/ssl_alert.erl
+++ b/lib/ssl/src/ssl_alert.erl
@@ -48,7 +48,9 @@ decode(Bin) ->
     decode(Bin, [], 0).
 
 %%--------------------------------------------------------------------
--spec reason_code(#alert{}, client | server) -> closed | {essl, string()}.
+-spec reason_code(#alert{}, client | server) ->
+                         closed | {tls_alert, unicode:chardata()}.
+%-spec reason_code(#alert{}, client | server) -> closed | {essl, string()}.
 %%
 %% Description: Returns the error reason that will be returned to the
 %% user.
diff --git a/lib/ssl/src/ssl_certificate.erl b/lib/ssl/src/ssl_certificate.erl
index 0dd5e5c5cf..a3333d35e9 100644
--- a/lib/ssl/src/ssl_certificate.erl
+++ b/lib/ssl/src/ssl_certificate.erl
@@ -138,13 +138,8 @@ validate(_, {bad_cert, _} = Reason, _) ->
     {fail, Reason};
 validate(_, valid, UserState) ->
     {valid, UserState};
-validate(Cert, valid_peer, UserState = {client, _,_, Hostname, _, _}) when Hostname =/= undefined ->
-    case public_key:pkix_verify_hostname(Cert, [{dns_id, Hostname}]) of
-        true ->
-            {valid, UserState};
-        false ->
-            {fail, {bad_cert, hostname_check_failed}}
-    end;
+validate(Cert, valid_peer, UserState = {client, _,_, Hostname, _, _}) when Hostname =/= disable ->
+    verify_hostname(Hostname, Cert, UserState);  
 validate(_, valid_peer, UserState) ->    
    {valid, UserState}.
 
@@ -337,3 +332,32 @@ new_trusteded_chain(DerCert, [_ | Rest]) ->
     new_trusteded_chain(DerCert, Rest);
 new_trusteded_chain(_, []) ->
     unknown_ca.
+
+verify_hostname({fallback, Hostname}, Cert, UserState) when is_list(Hostname) ->
+    case public_key:pkix_verify_hostname(Cert, [{dns_id, Hostname}]) of
+        true ->
+            {valid, UserState};
+        false ->
+            case public_key:pkix_verify_hostname(Cert, [{ip, Hostname}]) of
+                true ->
+                    {valid, UserState};
+                false ->
+                    {fail, {bad_cert, hostname_check_failed}}
+            end
+    end;
+
+verify_hostname({fallback, Hostname}, Cert, UserState) ->
+    case public_key:pkix_verify_hostname(Cert, [{ip, Hostname}]) of
+        true ->
+            {valid, UserState};
+        false ->
+            {fail, {bad_cert, hostname_check_failed}}
+    end;
+
+verify_hostname(Hostname, Cert, UserState) ->
+    case public_key:pkix_verify_hostname(Cert, [{dns_id, Hostname}]) of
+        true ->
+            {valid, UserState};
+        false ->
+            {fail, {bad_cert, hostname_check_failed}}
+    end.
diff --git a/lib/ssl/src/ssl_cipher.erl b/lib/ssl/src/ssl_cipher.erl
index b6cd22dd13..28b26fd358 100644
--- a/lib/ssl/src/ssl_cipher.erl
+++ b/lib/ssl/src/ssl_cipher.erl
@@ -36,28 +36,31 @@
 -export([security_parameters/2, security_parameters/3, suite_definition/1,
 	 erl_suite_definition/1,
 	 cipher_init/3, decipher/6, cipher/5, decipher_aead/6, cipher_aead/6,
-	 suite/1, suites/1, all_suites/1, 
-	 ec_keyed_suites/0, anonymous_suites/1, psk_suites/1, srp_suites/0,
-	 rc4_suites/1, des_suites/1, openssl_suite/1, openssl_suite_name/1, filter/2, filter_suites/1,
+	 suite/1, suites/1, all_suites/1,  crypto_support_filters/0,
+	 ec_keyed_suites/0, chacha_suites/1, anonymous_suites/1, psk_suites/1, psk_suites_anon/1, 
+         srp_suites/0, srp_suites_anon/0,
+	 rc4_suites/1, des_suites/1, rsa_suites/1, openssl_suite/1, openssl_suite_name/1, 
+         filter/2, filter_suites/1, filter_suites/2,
 	 hash_algorithm/1, sign_algorithm/1, is_acceptable_hash/2, is_fallback/1,
 	 random_bytes/1, calc_mac_hash/4,
          is_stream_ciphersuite/1]).
 
 -export_type([cipher_suite/0,
-	      erl_cipher_suite/0, openssl_cipher_suite/0,
+	      erl_cipher_suite/0, old_erl_cipher_suite/0, openssl_cipher_suite/0,
 	      hash/0, key_algo/0, sign_algo/0]).
 
--type cipher()            :: null |rc4_128 | des_cbc | '3des_ede_cbc' 
-			   | aes_128_cbc |  aes_256_cbc | aes_128_gcm | aes_256_gcm | chacha20_poly1305.
+-type cipher()            :: null |rc4_128 | des_cbc | '3des_ede_cbc' | aes_128_cbc |  aes_256_cbc | aes_128_gcm | aes_256_gcm | chacha20_poly1305.
 -type hash()              :: null | md5 | sha | sha224 | sha256 | sha384 | sha512.
 -type sign_algo()         :: rsa | dsa | ecdsa.
--type key_algo()          :: null | rsa | dhe_rsa | dhe_dss | ecdhe_ecdsa| ecdh_ecdsa | ecdh_rsa| srp_rsa| srp_dss | 
-			     psk | dhe_psk | rsa_psk | dh_anon | ecdh_anon | srp_anon.
--type erl_cipher_suite()  :: {key_algo(), cipher(), hash()} % Pre TLS 1.2 
-			     %% TLS 1.2, internally PRE TLS 1.2 will use default_prf
-			   | {key_algo(), cipher(), hash(), hash() | default_prf}. 
-
- 
+-type key_algo()          :: null | rsa | dhe_rsa | dhe_dss | ecdhe_ecdsa| ecdh_ecdsa | ecdh_rsa| srp_rsa| srp_dss | psk | dhe_psk | rsa_psk | dh_anon | ecdh_anon | srp_anon.
+-type erl_cipher_suite()  :: #{key_exchange := key_algo(),
+                               cipher := cipher(),
+                               mac    := hash() | aead,
+                               prf    := hash() | default_prf %% Old cipher suites, version dependent
+                              }.  
+-type old_erl_cipher_suite() :: {key_algo(), cipher(), hash()} % Pre TLS 1.2 
+                                %% TLS 1.2, internally PRE TLS 1.2 will use default_prf
+                              | {key_algo(), cipher(), hash(), hash() | default_prf}. 
 -type cipher_suite()      :: binary().
 -type cipher_enum()        :: integer().
 -type openssl_cipher_suite()  :: string().
@@ -83,7 +86,8 @@ security_parameters(?TLS_NULL_WITH_NULL_NULL = CipherSuite, SecParams) ->
 %% cipher values has been updated according to <CipherSuite> 
 %%-------------------------------------------------------------------
 security_parameters(Version, CipherSuite, SecParams) ->
-    { _, Cipher, Hash, PrfHashAlg} = suite_definition(CipherSuite),
+    #{cipher := Cipher, mac := Hash, 
+      prf := PrfHashAlg} = suite_definition(CipherSuite),
     SecParams#security_parameters{
       cipher_suite = CipherSuite,
       bulk_cipher_algorithm = bulk_cipher_algorithm(Cipher),
@@ -92,7 +96,7 @@ security_parameters(Version, CipherSuite, SecParams) ->
       expanded_key_material_length = expanded_key_material(Cipher),
       key_material_length = key_material(Cipher),
       iv_size = iv_size(Cipher),
-      mac_algorithm = hash_algorithm(Hash),
+      mac_algorithm = mac_algorithm(Hash),
       prf_algorithm = prf_algorithm(PrfHashAlg, Version),
       hash_size = hash_size(Hash)}.
 
@@ -235,7 +239,7 @@ decipher(?AES_CBC, HashSz, CipherState, Fragment, Version, PaddingCheck) ->
 
 %%--------------------------------------------------------------------
 -spec decipher_aead(cipher_enum(),  #cipher_state{}, integer(), binary(), binary(), ssl_record:ssl_version()) ->
-			   {binary(), binary(), #cipher_state{}} | #alert{}.
+			   {binary(), #cipher_state{}} | #alert{}.
 %%
 %% Description: Decrypts the data and checks the associated data (AAD) MAC using
 %% cipher described by cipher_enum() and updating the cipher state.
@@ -318,13 +322,28 @@ suites({_, Minor}) ->
 
 all_suites({3, _} = Version) ->
     suites(Version)
-	++ anonymous_suites(Version)
+        ++ chacha_suites(Version)
 	++ psk_suites(Version)
 	++ srp_suites()
         ++ rc4_suites(Version)
-        ++ des_suites(Version);
+        ++ des_suites(Version)
+        ++ rsa_suites(Version);
+
 all_suites(Version) ->
     dtls_v1:all_suites(Version).
+%%--------------------------------------------------------------------
+-spec chacha_suites(ssl_record:ssl_version() | integer()) -> [cipher_suite()].
+%%
+%% Description: Returns list of the chacha cipher suites, only supported
+%% if explicitly set by user for now due to interop problems, proably need
+%% to be fixed in crypto.
+%%--------------------------------------------------------------------
+chacha_suites({3, _}) ->
+    [?TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
+     ?TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+     ?TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256];
+chacha_suites(_) ->
+    [].
 
 %%--------------------------------------------------------------------
 -spec anonymous_suites(ssl_record:ssl_version() | integer()) -> [cipher_suite()].
@@ -332,14 +351,13 @@ all_suites(Version) ->
 %% Description: Returns a list of the anonymous cipher suites, only supported
 %% if explicitly set by user. Intended only for testing.
 %%--------------------------------------------------------------------
-
 anonymous_suites({3, N}) ->
-    anonymous_suites(N);
+    srp_suites_anon() ++ anonymous_suites(N);
 anonymous_suites({254, _} = Version) ->
-    anonymous_suites(dtls_v1:corresponding_tls_version(Version))
-        -- [?TLS_DH_anon_WITH_RC4_128_MD5];
+    dtls_v1:anonymous_suites(Version);
 anonymous_suites(N)
   when N >= 3 ->
+    psk_suites_anon(N) ++
     [?TLS_DH_anon_WITH_AES_128_GCM_SHA256,
      ?TLS_DH_anon_WITH_AES_256_GCM_SHA384,
      ?TLS_DH_anon_WITH_AES_128_CBC_SHA256,
@@ -348,20 +366,20 @@ anonymous_suites(N)
      ?TLS_ECDH_anon_WITH_AES_256_CBC_SHA,
      ?TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA,
      ?TLS_DH_anon_WITH_RC4_128_MD5];
-
-anonymous_suites(2) ->
+anonymous_suites(2 = N) ->
+    psk_suites_anon(N) ++
     [?TLS_ECDH_anon_WITH_AES_128_CBC_SHA,
      ?TLS_ECDH_anon_WITH_AES_256_CBC_SHA,
      ?TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA,
      ?TLS_DH_anon_WITH_DES_CBC_SHA,
      ?TLS_DH_anon_WITH_RC4_128_MD5];
-
 anonymous_suites(N)  when N == 0;
 			  N == 1 ->
-    [?TLS_DH_anon_WITH_RC4_128_MD5,
-     ?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA,
-     ?TLS_DH_anon_WITH_DES_CBC_SHA
-    ].
+    psk_suites_anon(N) ++
+        [?TLS_DH_anon_WITH_RC4_128_MD5,
+         ?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA,
+         ?TLS_DH_anon_WITH_DES_CBC_SHA
+        ].
 
 %%--------------------------------------------------------------------
 -spec psk_suites(ssl_record:ssl_version() | integer()) -> [cipher_suite()].
@@ -371,46 +389,55 @@ anonymous_suites(N)  when N == 0;
 %%--------------------------------------------------------------------
 psk_suites({3, N}) ->
     psk_suites(N);
-
 psk_suites(N)
   when N >= 3 ->
     [
-     ?TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384,
-     ?TLS_DHE_PSK_WITH_AES_256_GCM_SHA384,
      ?TLS_RSA_PSK_WITH_AES_256_GCM_SHA384,
+     ?TLS_RSA_PSK_WITH_AES_256_CBC_SHA384,
+     ?TLS_RSA_PSK_WITH_AES_128_GCM_SHA256,
+     ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA256
+    ] ++ psk_suites(0);
+psk_suites(_) ->
+    [?TLS_RSA_PSK_WITH_AES_256_CBC_SHA,
+     ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA,
+     ?TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA,
+     ?TLS_RSA_PSK_WITH_RC4_128_SHA].
+
+%%--------------------------------------------------------------------
+-spec psk_suites_anon(ssl_record:ssl_version() | integer()) -> [cipher_suite()].
+%%
+%% Description: Returns a list of the anonymous PSK cipher suites, only supported
+%% if explicitly set by user.
+%%--------------------------------------------------------------------
+psk_suites_anon({3, N}) ->
+    psk_suites_anon(N);
+psk_suites_anon(N)
+  when N >= 3 ->
+    [
+     ?TLS_DHE_PSK_WITH_AES_256_GCM_SHA384,
      ?TLS_PSK_WITH_AES_256_GCM_SHA384,
      ?TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384,
      ?TLS_DHE_PSK_WITH_AES_256_CBC_SHA384,
-     ?TLS_RSA_PSK_WITH_AES_256_CBC_SHA384,
      ?TLS_PSK_WITH_AES_256_CBC_SHA384,
      ?TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256,
      ?TLS_DHE_PSK_WITH_AES_128_GCM_SHA256,
-     ?TLS_RSA_PSK_WITH_AES_128_GCM_SHA256,
      ?TLS_PSK_WITH_AES_128_GCM_SHA256,
      ?TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256,
      ?TLS_DHE_PSK_WITH_AES_128_CBC_SHA256,
-     ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA256,
      ?TLS_PSK_WITH_AES_128_CBC_SHA256
-    ] ++ psk_suites(0);
-
-psk_suites(_) ->
-	[?TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA,
-	 ?TLS_DHE_PSK_WITH_AES_256_CBC_SHA,
-	 ?TLS_RSA_PSK_WITH_AES_256_CBC_SHA,
+    ] ++ psk_suites_anon(0);
+psk_suites_anon(_) ->
+	[?TLS_DHE_PSK_WITH_AES_256_CBC_SHA,
 	 ?TLS_PSK_WITH_AES_256_CBC_SHA,
 	 ?TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA,
 	 ?TLS_DHE_PSK_WITH_AES_128_CBC_SHA,
-	 ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA,
 	 ?TLS_PSK_WITH_AES_128_CBC_SHA,
 	 ?TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA,
 	 ?TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA,
-	 ?TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA,
 	 ?TLS_PSK_WITH_3DES_EDE_CBC_SHA,
 	 ?TLS_ECDHE_PSK_WITH_RC4_128_SHA,
 	 ?TLS_DHE_PSK_WITH_RC4_128_SHA,
-	 ?TLS_RSA_PSK_WITH_RC4_128_SHA,
 	 ?TLS_PSK_WITH_RC4_128_SHA].
-
 %%--------------------------------------------------------------------
 -spec srp_suites() -> [cipher_suite()].
 %%
@@ -418,17 +445,26 @@ psk_suites(_) ->
 %% if explicitly set by user.
 %%--------------------------------------------------------------------
 srp_suites() ->
-    [?TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA,
-     ?TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA,
+    [?TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA,
      ?TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA,
-     ?TLS_SRP_SHA_WITH_AES_128_CBC_SHA,
      ?TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA,
      ?TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA,
-     ?TLS_SRP_SHA_WITH_AES_256_CBC_SHA,
      ?TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA,
      ?TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA].
+
 %%--------------------------------------------------------------------
--spec rc4_suites(Version::ssl_record:ssl_version()) -> [cipher_suite()].
+-spec srp_suites_anon() -> [cipher_suite()].
+%%
+%% Description: Returns a list of the SRP anonymous cipher suites, only supported
+%% if explicitly set by user.
+%%--------------------------------------------------------------------
+srp_suites_anon() ->
+    [?TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA,
+     ?TLS_SRP_SHA_WITH_AES_128_CBC_SHA,
+     ?TLS_SRP_SHA_WITH_AES_256_CBC_SHA].
+
+%%--------------------------------------------------------------------
+-spec rc4_suites(Version::ssl_record:ssl_version() | integer()) -> [cipher_suite()].
 %%
 %% Description: Returns a list of the RSA|(ECDH/RSA)| (ECDH/ECDSA) 
 %% with RC4 cipher suites, only supported if explicitly set by user. 
@@ -436,13 +472,15 @@ srp_suites() ->
 %% belonged to the user configured only category.
 %%--------------------------------------------------------------------
 rc4_suites({3, 0}) ->
+    rc4_suites(0);
+rc4_suites({3, Minor}) ->
+    rc4_suites(Minor) ++ rc4_suites(0);
+rc4_suites(0) ->
     [?TLS_RSA_WITH_RC4_128_SHA,
      ?TLS_RSA_WITH_RC4_128_MD5];
-rc4_suites({3, N}) when N =< 3 ->
+rc4_suites(N) when N =< 3 ->
     [?TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
      ?TLS_ECDHE_RSA_WITH_RC4_128_SHA,
-     ?TLS_RSA_WITH_RC4_128_SHA,
-     ?TLS_RSA_WITH_RC4_128_MD5,
      ?TLS_ECDH_ECDSA_WITH_RC4_128_SHA,
      ?TLS_ECDH_RSA_WITH_RC4_128_SHA].
 %%--------------------------------------------------------------------
@@ -454,9 +492,39 @@ rc4_suites({3, N}) when N =< 3 ->
 %%--------------------------------------------------------------------
 des_suites(_)->
     [?TLS_DHE_RSA_WITH_DES_CBC_SHA,
-     ?TLS_RSA_WITH_DES_CBC_SHA].
+     ?TLS_RSA_WITH_DES_CBC_SHA,
+     ?TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
+     ?TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
+     ?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
+     ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
+     ?TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
+     ?TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
+    ].
 
 %%--------------------------------------------------------------------
+-spec rsa_suites(Version::ssl_record:ssl_version() | integer()) -> [cipher_suite()].
+%%
+%% Description: Returns a list of the RSA key exchange 
+%% cipher suites, only supported if explicitly set by user. 
+%% Are not considered secure any more. 
+%%--------------------------------------------------------------------
+rsa_suites({3, 0}) ->
+    rsa_suites(0);
+rsa_suites({3, Minor}) ->
+    rsa_suites(Minor) ++ rsa_suites(0);
+rsa_suites(0) ->
+    [?TLS_RSA_WITH_AES_256_CBC_SHA,
+     ?TLS_RSA_WITH_AES_128_CBC_SHA,
+     ?TLS_RSA_WITH_3DES_EDE_CBC_SHA
+    ];  
+rsa_suites(N) when N =< 3 ->
+    [
+     ?TLS_RSA_WITH_AES_256_GCM_SHA384,
+     ?TLS_RSA_WITH_AES_256_CBC_SHA256,
+     ?TLS_RSA_WITH_AES_128_GCM_SHA256,
+     ?TLS_RSA_WITH_AES_128_CBC_SHA256
+    ].
+%%--------------------------------------------------------------------
 -spec suite_definition(cipher_suite()) -> erl_cipher_suite().
 %%
 %% Description: Return erlang cipher suite definition.
@@ -465,353 +533,740 @@ des_suites(_)->
 %%-------------------------------------------------------------------
 %% TLS v1.1 suites
 suite_definition(?TLS_NULL_WITH_NULL_NULL) ->
-    {null, null, null, null};
+    #{key_exchange => null,
+      cipher => null, 
+      mac => null, 
+      prf => null};
 %% RFC 5746 - Not a real cipher suite used to signal empty "renegotiation_info" extension
 %% to avoid handshake failure from old servers that do not ignore
 %% hello extension data as they should.
 suite_definition(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV) ->
-    {null, null, null, null};
-%% suite_definition(?TLS_RSA_WITH_NULL_MD5) ->
-%%     {rsa, null, md5, default_prf};
-%% suite_definition(?TLS_RSA_WITH_NULL_SHA) ->
-%%     {rsa, null, sha, default_prf};
+    #{key_exchange => null,
+      cipher => null, 
+      mac => null,
+      prf => null};
 suite_definition(?TLS_RSA_WITH_RC4_128_MD5) ->	
-    {rsa, rc4_128, md5, default_prf};
+    #{key_exchange => rsa,
+      cipher => rc4_128, 
+      mac => md5, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_WITH_RC4_128_SHA) ->
-    {rsa, rc4_128, sha, default_prf};
+    #{key_exchange => rsa,
+      cipher => rc4_128,
+      mac => sha,
+      prf => default_prf};
 suite_definition(?TLS_RSA_WITH_DES_CBC_SHA) ->
-    {rsa, des_cbc, sha, default_prf};
+    #{key_exchange => rsa,
+      cipher => des_cbc,
+      mac => sha,
+      prf => default_prf};
 suite_definition(?TLS_RSA_WITH_3DES_EDE_CBC_SHA) ->
-    {rsa, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => rsa,
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_DSS_WITH_DES_CBC_SHA) ->
-    {dhe_dss, des_cbc, sha, default_prf};
+    #{key_exchange => dhe_dss, 
+      cipher => des_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA) ->
-    {dhe_dss, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => dhe_dss, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_RSA_WITH_DES_CBC_SHA) ->
-    {dhe_rsa, des_cbc, sha, default_prf};
+    #{key_exchange => dhe_rsa, 
+      cipher => des_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA) ->
-    {dhe_rsa, '3des_ede_cbc', sha, default_prf};
-
+    #{key_exchange => dhe_rsa, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 %%% TSL V1.1 AES suites
 suite_definition(?TLS_RSA_WITH_AES_128_CBC_SHA) -> 
-    {rsa, aes_128_cbc, sha, default_prf};
+    #{key_exchange => rsa,
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_DSS_WITH_AES_128_CBC_SHA) ->
-    {dhe_dss, aes_128_cbc, sha, default_prf};
+    #{key_exchange => dhe_dss, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_RSA_WITH_AES_128_CBC_SHA) ->
-    {dhe_rsa, aes_128_cbc, sha, default_prf};
+    #{key_exchange => dhe_rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_WITH_AES_256_CBC_SHA) -> 
-    {rsa, aes_256_cbc, sha, default_prf};
+    #{key_exchange => rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_DSS_WITH_AES_256_CBC_SHA) ->
-    {dhe_dss, aes_256_cbc, sha, default_prf};
+    #{key_exchange => dhe_dss, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_RSA_WITH_AES_256_CBC_SHA) ->
-    {dhe_rsa, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => dhe_rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 %% TLS v1.2 suites
-
 %% suite_definition(?TLS_RSA_WITH_NULL_SHA) ->
 %%     {rsa, null, sha, default_prf};
 suite_definition(?TLS_RSA_WITH_AES_128_CBC_SHA256) ->
-    {rsa, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_WITH_AES_256_CBC_SHA256) ->
-    {rsa, aes_256_cbc, sha256, default_prf};
+    #{key_exchange => rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_DSS_WITH_AES_128_CBC_SHA256) ->
-    {dhe_dss, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => dhe_dss, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_RSA_WITH_AES_128_CBC_SHA256) ->
-    {dhe_rsa, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => dhe_rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_DSS_WITH_AES_256_CBC_SHA256) ->
-    {dhe_dss, aes_256_cbc, sha256, default_prf};
+    #{key_exchange => dhe_dss, 
+      cipher => aes_256_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_RSA_WITH_AES_256_CBC_SHA256) ->
-    {dhe_rsa, aes_256_cbc, sha256, default_prf};
-
+    #{key_exchange => dhe_rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 %% not defined YET:
 %%   TLS_DH_DSS_WITH_AES_128_CBC_SHA256      DH_DSS       AES_128_CBC  SHA256
 %%   TLS_DH_RSA_WITH_AES_128_CBC_SHA256      DH_RSA       AES_128_CBC  SHA256
 %%   TLS_DH_DSS_WITH_AES_256_CBC_SHA256      DH_DSS       AES_256_CBC  SHA256
 %%   TLS_DH_RSA_WITH_AES_256_CBC_SHA256      DH_RSA       AES_256_CBC  SHA256
-
 %%% DH-ANON deprecated by TLS spec and not available
 %%% by default, but good for testing purposes.
 suite_definition(?TLS_DH_anon_WITH_RC4_128_MD5) ->
-    {dh_anon, rc4_128, md5, default_prf};
+    #{key_exchange => dh_anon, 
+      cipher => rc4_128, 
+      mac => md5, 
+      prf => default_prf};
 suite_definition(?TLS_DH_anon_WITH_DES_CBC_SHA) ->
-    {dh_anon, des_cbc, sha, default_prf};
+    #{key_exchange => dh_anon, 
+      cipher => des_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA) ->
-    {dh_anon, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => dh_anon, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DH_anon_WITH_AES_128_CBC_SHA) ->
-    {dh_anon, aes_128_cbc, sha, default_prf};
+    #{key_exchange => dh_anon, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DH_anon_WITH_AES_256_CBC_SHA) ->
-    {dh_anon, aes_256_cbc, sha, default_prf};
+    #{key_exchange => dh_anon, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DH_anon_WITH_AES_128_CBC_SHA256) ->
-    {dh_anon, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => dh_anon, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_DH_anon_WITH_AES_256_CBC_SHA256) ->
-    {dh_anon, aes_256_cbc, sha256, default_prf};
-
+    #{key_exchange => dh_anon, 
+      cipher => aes_256_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 %%% PSK Cipher Suites RFC 4279
-
 suite_definition(?TLS_PSK_WITH_RC4_128_SHA) ->
-    {psk, rc4_128, sha, default_prf};
+    #{key_exchange => psk, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_PSK_WITH_3DES_EDE_CBC_SHA) ->
-    {psk, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => psk, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_PSK_WITH_AES_128_CBC_SHA) ->
-    {psk, aes_128_cbc, sha, default_prf};
+    #{key_exchange => psk, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_PSK_WITH_AES_256_CBC_SHA) ->
-    {psk, aes_256_cbc, sha, default_prf};
+    #{key_exchange => psk, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_RC4_128_SHA) ->
-    {dhe_psk, rc4_128, sha, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA) ->
-    {dhe_psk, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_AES_128_CBC_SHA) ->
-    {dhe_psk, aes_128_cbc, sha, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_AES_256_CBC_SHA) ->
-    {dhe_psk, aes_256_cbc, sha, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_RC4_128_SHA) ->
-    {rsa_psk, rc4_128, sha, default_prf};
+    #{key_exchange => rsa_psk, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA) ->
-    {rsa_psk, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => rsa_psk, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_AES_128_CBC_SHA) ->
-    {rsa_psk, aes_128_cbc, sha, default_prf};
+    #{key_exchange => rsa_psk, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_AES_256_CBC_SHA) ->
-    {rsa_psk, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => rsa_psk, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 %%% PSK NULL Cipher Suites RFC 4785
-
 suite_definition(?TLS_PSK_WITH_NULL_SHA) ->
-    {psk, null, sha, default_prf};
+    #{key_exchange => psk, 
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_NULL_SHA) ->
-    {dhe_psk, null, sha, default_prf};
+    #{key_exchange => dhe_psk,
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_NULL_SHA) ->
-    {rsa_psk, null, sha, default_prf};
-
+    #{key_exchange => rsa_psk,
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};  
 %%% TLS 1.2 PSK Cipher Suites RFC 5487
-
 suite_definition(?TLS_PSK_WITH_AES_128_GCM_SHA256) ->
-    {psk, aes_128_gcm, null, sha256};
+    #{key_exchange => psk, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_PSK_WITH_AES_256_GCM_SHA384) ->
-    {psk, aes_256_gcm, null, sha384};
+    #{key_exchange => psk, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_DHE_PSK_WITH_AES_128_GCM_SHA256) ->
-    {dhe_psk, aes_128_gcm, null, sha256};
+    #{key_exchange => dhe_psk, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_DHE_PSK_WITH_AES_256_GCM_SHA384) ->
-    {dhe_psk, aes_256_gcm, null, sha384};
+    #{key_exchange => dhe_psk, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_RSA_PSK_WITH_AES_128_GCM_SHA256) ->
-    {rsa_psk, aes_128_gcm, null, sha256};
+    #{key_exchange => rsa_psk, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_RSA_PSK_WITH_AES_256_GCM_SHA384) ->
-    {rsa_psk, aes_256_gcm, null, sha384};
-
+    #{key_exchange => rsa_psk, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_PSK_WITH_AES_128_CBC_SHA256) ->
-    {psk, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => psk, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_PSK_WITH_AES_256_CBC_SHA384) ->
-    {psk, aes_256_cbc, sha384, default_prf};
+    #{key_exchange => psk, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_AES_128_CBC_SHA256) ->
-    {dhe_psk, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_AES_256_CBC_SHA384) ->
-    {dhe_psk, aes_256_cbc, sha384, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_AES_128_CBC_SHA256) ->
-    {rsa_psk, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => rsa_psk, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_AES_256_CBC_SHA384) ->
-    {rsa_psk, aes_256_cbc, sha384, default_prf};
-
+    #{key_exchange => rsa_psk, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => default_prf};
 suite_definition(?TLS_PSK_WITH_NULL_SHA256) ->
-    {psk, null, sha256, default_prf};
+    #{key_exchange => psk, 
+      cipher => null, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_PSK_WITH_NULL_SHA384) ->
-    {psk, null, sha384, default_prf};
+    #{key_exchange => psk, 
+      cipher => null, 
+      mac => sha384, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_NULL_SHA256) ->
-    {dhe_psk, null, sha256, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => null, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_DHE_PSK_WITH_NULL_SHA384) ->
-    {dhe_psk, null, sha384, default_prf};
+    #{key_exchange => dhe_psk, 
+      cipher => null, 
+      mac => sha384, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_NULL_SHA256) ->
-    {rsa_psk, null, sha256, default_prf};
+    #{key_exchange => rsa_psk, 
+      cipher => null, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_RSA_PSK_WITH_NULL_SHA384) ->
-    {rsa_psk, null, sha384, default_prf};
-
+    #{key_exchange => rsa_psk, 
+      cipher => null, 
+      mac => sha384, 
+      prf => default_prf};
 %%% ECDHE PSK Cipher Suites RFC 5489
-
 suite_definition(?TLS_ECDHE_PSK_WITH_RC4_128_SHA) ->
-    {ecdhe_psk, rc4_128, sha, default_prf};
+    #{key_exchange => ecdhe_psk, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA) ->
-    {ecdhe_psk, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => ecdhe_psk, 
+      cipher => '3des_ede_cbc',
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA) ->
-    {ecdhe_psk, aes_128_cbc, sha, default_prf};
+    #{key_exchange => ecdhe_psk, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA) ->
-    {ecdhe_psk, aes_256_cbc, sha, default_prf};
+    #{key_exchange => ecdhe_psk, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256) ->
-    {ecdhe_psk, aes_128_cbc, sha256, default_prf};
+    #{key_exchange => ecdhe_psk, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384) ->
-    {ecdhe_psk, aes_256_cbc, sha384, default_prf};
+    #{key_exchange => ecdhe_psk, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_PSK_WITH_NULL_SHA256) ->
-    {ecdhe_psk, null, sha256, default_prf};
+    #{key_exchange => ecdhe_psk, 
+      cipher => null, 
+      mac => sha256, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_PSK_WITH_NULL_SHA384) ->
-    {ecdhe_psk, null, sha384, default_prf};
-
+    #{key_exchange => ecdhe_psk, 
+      cipher => null, mac => sha384, 
+      prf => default_prf};
 %%% ECDHE_PSK with AES-GCM and AES-CCM Cipher Suites, draft-ietf-tls-ecdhe-psk-aead-05
-
 suite_definition(?TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256) ->
-    {ecdhe_psk, aes_128_gcm, null, sha256};
+    #{key_exchange => ecdhe_psk, 
+      cipher => aes_128_gcm, 
+      mac => null, 
+      prf => sha256};
 suite_definition(?TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384) ->
-    {ecdhe_psk, aes_256_gcm, null, sha384};
+    #{key_exchange => ecdhe_psk, 
+      cipher => aes_256_gcm, 
+      mac => null, 
+      prf => sha384};
 %% suite_definition(?TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256) ->
-%%    {ecdhe_psk, aes_128_ccm, null, sha256};
+%%     #{key_exchange => ecdhe_psk, 
+%%       cipher => aes_128_ccm, 
+%%       mac => null, 
+%%       prf =>sha256};
 %% suite_definition(?TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256) ->
-%%    {ecdhe_psk, aes_256_ccm, null, sha256};
-
+%%     #{key_exchange => ecdhe_psk, 
+%%       cipher => aes_256_ccm, 
+%%       mac => null, 
+%%       prf => sha256};
 %%% SRP Cipher Suites RFC 5054
-
 suite_definition(?TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA) ->
-    {srp_anon, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => srp_anon, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA) ->
-    {srp_rsa, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => srp_rsa, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA) ->
-    {srp_dss, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => srp_dss, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_WITH_AES_128_CBC_SHA) ->
-    {srp_anon, aes_128_cbc, sha, default_prf};
+    #{key_exchange => srp_anon, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA) ->
-    {srp_rsa, aes_128_cbc, sha, default_prf};
+    #{key_exchange => srp_rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA) ->
-    {srp_dss, aes_128_cbc, sha, default_prf};
+    #{key_exchange => srp_dss, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_WITH_AES_256_CBC_SHA) ->
-    {srp_anon, aes_256_cbc, sha, default_prf};
+    #{key_exchange => srp_anon, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA) ->
-    {srp_rsa, aes_256_cbc, sha, default_prf};
+    #{key_exchange => srp_rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA) ->
-    {srp_dss, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => srp_dss, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 %% RFC 4492 EC TLS suites
 suite_definition(?TLS_ECDH_ECDSA_WITH_NULL_SHA) ->
-    {ecdh_ecdsa, null, sha, default_prf};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_ECDSA_WITH_RC4_128_SHA) ->
-    {ecdh_ecdsa, rc4_128, sha, default_prf};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA) ->
-    {ecdh_ecdsa, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA) ->
-    {ecdh_ecdsa, aes_128_cbc, sha, default_prf};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA) ->
-    {ecdh_ecdsa, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_NULL_SHA) ->
-    {ecdhe_ecdsa, null, sha, default_prf};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_RC4_128_SHA) ->
-    {ecdhe_ecdsa, rc4_128, sha, default_prf};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA) ->
-    {ecdhe_ecdsa, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA) ->
-    {ecdhe_ecdsa, aes_128_cbc, sha, default_prf};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA) ->
-    {ecdhe_ecdsa, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_RSA_WITH_NULL_SHA) ->
-    {ecdh_rsa, null, sha, default_prf};
+    #{key_exchange => ecdh_rsa, 
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_RSA_WITH_RC4_128_SHA) ->
-    {ecdh_rsa, rc4_128, sha, default_prf};
+    #{key_exchange => ecdh_rsa, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA) ->
-    {ecdh_rsa, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => ecdh_rsa, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA) ->
-    {ecdh_rsa, aes_128_cbc, sha, default_prf};
+    #{key_exchange => ecdh_rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA) ->
-    {ecdh_rsa, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => ecdh_rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_RSA_WITH_NULL_SHA) ->
-    {ecdhe_rsa, null, sha, default_prf};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_RSA_WITH_RC4_128_SHA) ->
-    {ecdhe_rsa, rc4_128, sha, default_prf};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA) ->
-    {ecdhe_rsa, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) ->
-    {ecdhe_rsa, aes_128_cbc, sha, default_prf};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) ->
-    {ecdhe_rsa, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => ecdhe_rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_anon_WITH_NULL_SHA) ->
-    {ecdh_anon, null, sha, default_prf};
+    #{key_exchange => ecdh_anon, 
+      cipher => null, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_anon_WITH_RC4_128_SHA) ->
-    {ecdh_anon, rc4_128, sha, default_prf};
+    #{key_exchange => ecdh_anon, 
+      cipher => rc4_128, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA) ->
-    {ecdh_anon, '3des_ede_cbc', sha, default_prf};
+    #{key_exchange => ecdh_anon, 
+      cipher => '3des_ede_cbc', 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_anon_WITH_AES_128_CBC_SHA) ->
-    {ecdh_anon, aes_128_cbc, sha, default_prf};
+    #{key_exchange => ecdh_anon, 
+      cipher => aes_128_cbc, 
+      mac => sha, 
+      prf => default_prf};
 suite_definition(?TLS_ECDH_anon_WITH_AES_256_CBC_SHA) ->
-    {ecdh_anon, aes_256_cbc, sha, default_prf};
-
+    #{key_exchange => ecdh_anon, 
+      cipher => aes_256_cbc, 
+      mac => sha, 
+      prf => default_prf};
 %% RFC 5289 EC TLS suites
 suite_definition(?TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256) ->
-    {ecdhe_ecdsa, aes_128_cbc, sha256, sha256};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => sha256};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384) ->
-    {ecdhe_ecdsa, aes_256_cbc, sha384, sha384};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => sha384};
 suite_definition(?TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256) ->
-    {ecdh_ecdsa, aes_128_cbc, sha256, sha256};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => sha256};
 suite_definition(?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384) ->
-    {ecdh_ecdsa, aes_256_cbc, sha384, sha384};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => sha384};
 suite_definition(?TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) ->
-    {ecdhe_rsa, aes_128_cbc, sha256, sha256};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => sha256};
 suite_definition(?TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) ->
-    {ecdhe_rsa, aes_256_cbc, sha384, sha384};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => sha384};
 suite_definition(?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256) ->
-    {ecdh_rsa, aes_128_cbc, sha256, sha256};
+    #{key_exchange => ecdh_rsa, 
+      cipher => aes_128_cbc, 
+      mac => sha256, 
+      prf => sha256};
 suite_definition(?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384) ->
-    {ecdh_rsa, aes_256_cbc, sha384, sha384};
-
+    #{key_exchange => ecdh_rsa, 
+      cipher => aes_256_cbc, 
+      mac => sha384, 
+      prf => sha384};
 %% RFC 5288 AES-GCM Cipher Suites
 suite_definition(?TLS_RSA_WITH_AES_128_GCM_SHA256) ->
-    {rsa, aes_128_gcm, null, sha256};
+    #{key_exchange => rsa, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_RSA_WITH_AES_256_GCM_SHA384) ->
-    {rsa, aes_256_gcm, null, sha384};
+    #{key_exchange => rsa, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_DHE_RSA_WITH_AES_128_GCM_SHA256) ->
-    {dhe_rsa, aes_128_gcm, null, sha256};
+    #{key_exchange => dhe_rsa, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_DHE_RSA_WITH_AES_256_GCM_SHA384) ->
-    {dhe_rsa, aes_256_gcm, null, sha384};
+    #{key_exchange => dhe_rsa, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_DH_RSA_WITH_AES_128_GCM_SHA256) ->
-    {dh_rsa, aes_128_gcm, null, sha256};
+    #{key_exchange => dh_rsa, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_DH_RSA_WITH_AES_256_GCM_SHA384) ->
-    {dh_rsa, aes_256_gcm, null, sha384};
+    #{key_exchange => dh_rsa, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_DHE_DSS_WITH_AES_128_GCM_SHA256) ->
-    {dhe_dss, aes_128_gcm, null, sha256};
+    #{key_exchange => dhe_dss, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_DHE_DSS_WITH_AES_256_GCM_SHA384) ->
-    {dhe_dss, aes_256_gcm, null, sha384};
+    #{key_exchange => dhe_dss, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_DH_DSS_WITH_AES_128_GCM_SHA256) ->
-    {dh_dss, aes_128_gcm, null, sha256};
+    #{key_exchange => dh_dss, 
+      cipher => aes_128_gcm, 
+      mac => null, 
+      prf => sha256};
 suite_definition(?TLS_DH_DSS_WITH_AES_256_GCM_SHA384) ->
-    {dh_dss, aes_256_gcm, null, sha384};
+    #{key_exchange => dh_dss, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_DH_anon_WITH_AES_128_GCM_SHA256) ->
-    {dh_anon, aes_128_gcm, null, sha256};
+    #{key_exchange => dh_anon, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_DH_anon_WITH_AES_256_GCM_SHA384) ->
-    {dh_anon, aes_256_gcm, null, sha384};
-
+    #{key_exchange => dh_anon, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 %% RFC 5289 ECC AES-GCM Cipher Suites
 suite_definition(?TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) ->
-    {ecdhe_ecdsa, aes_128_gcm, null, sha256};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) ->
-    {ecdhe_ecdsa, aes_256_gcm, null, sha384};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256) ->
-    {ecdh_ecdsa, aes_128_gcm, null, sha256};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384) ->
-    {ecdh_ecdsa, aes_256_gcm, null, sha384};
+    #{key_exchange => ecdh_ecdsa, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) ->
-    {ecdhe_rsa, aes_128_gcm, null, sha256};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) ->
-    {ecdhe_rsa, aes_256_gcm, null, sha384};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 suite_definition(?TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256) ->
-    {ecdh_rsa, aes_128_gcm, null, sha256};
+    #{key_exchange => ecdh_rsa, 
+      cipher => aes_128_gcm, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384) ->
-    {ecdh_rsa, aes_256_gcm, null, sha384};
-
+    #{key_exchange => ecdh_rsa, 
+      cipher => aes_256_gcm, 
+      mac => aead, 
+      prf => sha384};
 %% draft-agl-tls-chacha20poly1305-04 Chacha20/Poly1305 Suites
 suite_definition(?TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256) ->
-    {ecdhe_rsa, chacha20_poly1305, null, sha256};
+    #{key_exchange => ecdhe_rsa, 
+      cipher => chacha20_poly1305, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256) ->
-    {ecdhe_ecdsa, chacha20_poly1305, null, sha256};
+    #{key_exchange => ecdhe_ecdsa, 
+      cipher => chacha20_poly1305, 
+      mac => aead, 
+      prf => sha256};
 suite_definition(?TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256) ->
-    {dhe_rsa, chacha20_poly1305, null, sha256}.
+    #{key_exchange => dhe_rsa, 
+      cipher => chacha20_poly1305, 
+      mac => aead, 
+      prf => sha256}.
 
 %%--------------------------------------------------------------------
--spec erl_suite_definition(cipher_suite()) -> erl_cipher_suite().
+-spec erl_suite_definition(cipher_suite() | erl_cipher_suite()) -> old_erl_cipher_suite().
 %%
 %% Description: Return erlang cipher suite definition. Filters last value
 %% for now (compatibility reasons).
 %%--------------------------------------------------------------------
-erl_suite_definition(S) ->
-    case suite_definition(S) of
-	{KeyExchange, Cipher, Hash, default_prf} ->
+erl_suite_definition(Bin) when is_binary(Bin) ->
+    erl_suite_definition(suite_definition(Bin));    
+erl_suite_definition(#{key_exchange := KeyExchange, cipher := Cipher,
+                       mac := Hash, prf := Prf}) ->
+    case Prf of
+        default_prf ->
 	    {KeyExchange, Cipher, Hash};
-	Suite ->
-	    Suite
+	_ ->
+            {KeyExchange, Cipher, Hash, Prf}
     end.
 
 %%--------------------------------------------------------------------
@@ -819,327 +1274,607 @@ erl_suite_definition(S) ->
 %%
 %% Description: Return TLS cipher suite definition.
 %%--------------------------------------------------------------------
-
 %% TLS v1.1 suites
-%%suite({rsa, null, md5}) ->
-%%    ?TLS_RSA_WITH_NULL_MD5;
-%%suite({rsa, null, sha}) ->
-%%    ?TLS_RSA_WITH_NULL_SHA;
-suite({rsa, rc4_128, md5}) ->
+suite(#{key_exchange := rsa, 
+        cipher := rc4_128, 
+        mac := md5}) ->
     ?TLS_RSA_WITH_RC4_128_MD5;
-suite({rsa, rc4_128, sha}) ->
+suite(#{key_exchange := rsa, 
+        cipher := rc4_128, 
+        mac := sha}) ->
     ?TLS_RSA_WITH_RC4_128_SHA;
-suite({rsa, des_cbc, sha}) ->
+suite(#{key_exchange := rsa, 
+        cipher := des_cbc, 
+        mac := sha}) ->
     ?TLS_RSA_WITH_DES_CBC_SHA; 
-suite({rsa, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := rsa, 
+        cipher :='3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_RSA_WITH_3DES_EDE_CBC_SHA; 
-suite({dhe_dss, des_cbc, sha}) ->
+suite(#{key_exchange := dhe_dss,  
+        cipher:= des_cbc, 
+        mac := sha}) ->
     ?TLS_DHE_DSS_WITH_DES_CBC_SHA;
-suite({dhe_dss, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := dhe_dss, 
+        cipher:= '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA;
-suite({dhe_rsa, des_cbc, sha}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher:= des_cbc,
+        mac := sha}) ->
     ?TLS_DHE_RSA_WITH_DES_CBC_SHA;
-suite({dhe_rsa, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher:= '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA; 
-suite({dh_anon, rc4_128, md5}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher:= rc4_128,
+        mac := md5}) ->
     ?TLS_DH_anon_WITH_RC4_128_MD5;
-suite({dh_anon, des_cbc, sha}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher:= des_cbc,  
+        mac := sha}) ->
     ?TLS_DH_anon_WITH_DES_CBC_SHA;
-suite({dh_anon, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher:= '3des_ede_cbc',
+        mac := sha}) ->
     ?TLS_DH_anon_WITH_3DES_EDE_CBC_SHA;
-
 %%% TSL V1.1 AES suites
-suite({rsa, aes_128_cbc, sha}) ->
+suite(#{key_exchange := rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_RSA_WITH_AES_128_CBC_SHA; 
-suite({dhe_dss, aes_128_cbc, sha}) ->
+suite(#{key_exchange := dhe_dss, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA; 
-suite({dhe_rsa, aes_128_cbc, sha}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA;
-suite({dh_anon, aes_128_cbc, sha}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_DH_anon_WITH_AES_128_CBC_SHA;
-suite({rsa, aes_256_cbc, sha}) ->
+suite(#{key_exchange := rsa, 
+        cipher := aes_256_cbc,  
+        mac := sha}) ->
     ?TLS_RSA_WITH_AES_256_CBC_SHA;
-suite({dhe_dss, aes_256_cbc, sha}) ->
+suite(#{key_exchange := dhe_dss, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_DHE_DSS_WITH_AES_256_CBC_SHA;
-suite({dhe_rsa, aes_256_cbc, sha}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_DHE_RSA_WITH_AES_256_CBC_SHA;
-suite({dh_anon, aes_256_cbc, sha}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_DH_anon_WITH_AES_256_CBC_SHA;
-
 %% TLS v1.2 suites
-
-%% suite_definition(?TLS_RSA_WITH_NULL_SHA) ->
-%%     {rsa, null, sha, sha256};
-suite({rsa, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha256}) ->
     ?TLS_RSA_WITH_AES_128_CBC_SHA256;
-suite({rsa, aes_256_cbc, sha256}) ->
+suite(#{key_exchange := rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha256}) ->
     ?TLS_RSA_WITH_AES_256_CBC_SHA256;
-suite({dhe_dss, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := dhe_dss, 
+        cipher := aes_128_cbc, 
+        mac := sha256}) ->
     ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA256;
-suite({dhe_rsa, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha256}) ->
     ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA256;
-suite({dhe_dss, aes_256_cbc, sha256}) ->
+suite(#{key_exchange := dhe_dss, 
+        cipher := aes_256_cbc, 
+        mac := sha256}) ->
     ?TLS_DHE_DSS_WITH_AES_256_CBC_SHA256;
-suite({dhe_rsa, aes_256_cbc, sha256}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha256}) ->
     ?TLS_DHE_RSA_WITH_AES_256_CBC_SHA256;
-suite({dh_anon, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher := aes_128_cbc, 
+        mac := sha256}) ->
     ?TLS_DH_anon_WITH_AES_128_CBC_SHA256;
-suite({dh_anon, aes_256_cbc, sha256}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher := aes_256_cbc, 
+        mac := sha256}) ->
     ?TLS_DH_anon_WITH_AES_256_CBC_SHA256;
-
 %%% PSK Cipher Suites RFC 4279
-
-suite({psk, rc4_128,sha}) ->
+suite(#{key_exchange := psk, 
+        cipher := rc4_128,
+        mac := sha}) ->
     ?TLS_PSK_WITH_RC4_128_SHA;
-suite({psk, '3des_ede_cbc',sha}) ->
+suite(#{key_exchange := psk, 
+        cipher := '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_PSK_WITH_3DES_EDE_CBC_SHA;
-suite({psk, aes_128_cbc,sha}) ->
+suite(#{key_exchange := psk, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_PSK_WITH_AES_128_CBC_SHA;
-suite({psk, aes_256_cbc,sha}) ->
+suite(#{key_exchange := psk, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_PSK_WITH_AES_256_CBC_SHA;
-suite({dhe_psk, rc4_128,sha}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := rc4_128, 
+        mac := sha})  ->
     ?TLS_DHE_PSK_WITH_RC4_128_SHA;
-suite({dhe_psk, '3des_ede_cbc',sha}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA;
-suite({dhe_psk, aes_128_cbc,sha}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_DHE_PSK_WITH_AES_128_CBC_SHA;
-suite({dhe_psk, aes_256_cbc,sha}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_DHE_PSK_WITH_AES_256_CBC_SHA;
-suite({rsa_psk, rc4_128,sha}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := rc4_128, 
+        mac := sha}) ->
     ?TLS_RSA_PSK_WITH_RC4_128_SHA;
-suite({rsa_psk, '3des_ede_cbc',sha}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA;
-suite({rsa_psk, aes_128_cbc,sha}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA;
-suite({rsa_psk, aes_256_cbc,sha}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_RSA_PSK_WITH_AES_256_CBC_SHA;
-
 %%% PSK NULL Cipher Suites RFC 4785
-
-suite({psk, null, sha}) ->
+suite(#{key_exchange := psk, 
+        cipher := null, 
+        mac := sha}) ->
     ?TLS_PSK_WITH_NULL_SHA;
-suite({dhe_psk, null, sha}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := null, 
+        mac := sha}) ->
     ?TLS_DHE_PSK_WITH_NULL_SHA;
-suite({rsa_psk, null, sha}) ->
+suite(#{key_exchange := rsa_psk, 
+       cipher := null, 
+       mac := sha}) ->
     ?TLS_RSA_PSK_WITH_NULL_SHA;
-
 %%% TLS 1.2 PSK Cipher Suites RFC 5487
-
-suite({psk, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := psk, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_PSK_WITH_AES_128_GCM_SHA256;
-suite({psk, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := psk, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_PSK_WITH_AES_256_GCM_SHA384;
-suite({dhe_psk, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_DHE_PSK_WITH_AES_128_GCM_SHA256;
-suite({dhe_psk, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_DHE_PSK_WITH_AES_256_GCM_SHA384;
-suite({rsa_psk, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_RSA_PSK_WITH_AES_128_GCM_SHA256;
-suite({rsa_psk, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_RSA_PSK_WITH_AES_256_GCM_SHA384;
-
-suite({psk, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := psk, 
+        cipher := aes_128_cbc, 
+        mac := sha256}) ->
     ?TLS_PSK_WITH_AES_128_CBC_SHA256;
-suite({psk, aes_256_cbc, sha384}) ->
+suite(#{key_exchange := psk, 
+        cipher := aes_256_cbc, 
+        mac := sha384}) ->
     ?TLS_PSK_WITH_AES_256_CBC_SHA384;
-suite({dhe_psk, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := aes_128_cbc, 
+        mac := sha256}) ->
     ?TLS_DHE_PSK_WITH_AES_128_CBC_SHA256;
-suite({dhe_psk, aes_256_cbc, sha384}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := aes_256_cbc, 
+        mac := sha384}) ->
     ?TLS_DHE_PSK_WITH_AES_256_CBC_SHA384;
-suite({rsa_psk, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := aes_128_cbc, 
+        mac := sha256}) ->
     ?TLS_RSA_PSK_WITH_AES_128_CBC_SHA256;
-suite({rsa_psk, aes_256_cbc, sha384}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := aes_256_cbc, 
+        mac := sha384}) ->
     ?TLS_RSA_PSK_WITH_AES_256_CBC_SHA384;
-
-suite({psk, null, sha256}) ->
+suite(#{key_exchange := psk, 
+        cipher := null, 
+        mac := sha256}) ->
     ?TLS_PSK_WITH_NULL_SHA256;
-suite({psk, null, sha384}) ->
+suite(#{key_exchange := psk, 
+        cipher := null,
+        mac := sha384}) ->
     ?TLS_PSK_WITH_NULL_SHA384;
-suite({dhe_psk, null, sha256}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := null, 
+        mac := sha256}) ->
     ?TLS_DHE_PSK_WITH_NULL_SHA256;
-suite({dhe_psk, null, sha384}) ->
+suite(#{key_exchange := dhe_psk, 
+        cipher := null, 
+        mac := sha384}) ->
     ?TLS_DHE_PSK_WITH_NULL_SHA384;
-suite({rsa_psk, null, sha256}) ->
+suite(#{key_exchange := rsa_psk, 
+        cipher := null,  
+        mac := sha256}) ->
     ?TLS_RSA_PSK_WITH_NULL_SHA256;
-suite({rsa_psk, null, sha384}) ->
+suite(#{key_exchange := rsa_psk, 
+       cipher := null, 
+       mac := sha384}) ->
     ?TLS_RSA_PSK_WITH_NULL_SHA384;
-
 %%% ECDHE PSK Cipher Suites RFC 5489
-
-suite({ecdhe_psk, rc4_128,sha}) ->
+suite(#{key_exchange := ecdhe_psk, 
+        cipher := rc4_128,
+        mac := sha}) ->
     ?TLS_ECDHE_PSK_WITH_RC4_128_SHA;
-suite({ecdhe_psk, '3des_ede_cbc',sha}) ->
+suite(#{key_exchange := ecdhe_psk, 
+        cipher :='3des_ede_cbc',
+        mac := sha}) ->
     ?TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA;
-suite({ecdhe_psk, aes_128_cbc,sha}) ->
+suite(#{key_exchange := ecdhe_psk, 
+        cipher := aes_128_cbc,
+        mac := sha}) ->
     ?TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA;
-suite({ecdhe_psk, aes_256_cbc,sha}) ->
+suite(#{key_exchange := ecdhe_psk, 
+        cipher := aes_256_cbc,
+        mac := sha}) ->
     ?TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA;
-suite({ecdhe_psk, aes_128_cbc, sha256}) ->
+suite(#{key_exchange := ecdhe_psk, 
+       cipher := aes_128_cbc, 
+       mac := sha256}) ->
     ?TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256;
-suite({ecdhe_psk, aes_256_cbc, sha384}) ->
+suite(#{key_exchange := ecdhe_psk, 
+       cipher := aes_256_cbc, 
+       mac := sha384}) ->
     ?TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384;
-suite({ecdhe_psk, null, sha256}) ->
+suite(#{key_exchange := ecdhe_psk, 
+       cipher := null, 
+       mac := sha256}) ->
     ?TLS_ECDHE_PSK_WITH_NULL_SHA256;
-suite({ecdhe_psk, null, sha384}) ->
+suite(#{key_exchange := ecdhe_psk, 
+       cipher := null, 
+       mac := sha384}) ->
     ?TLS_ECDHE_PSK_WITH_NULL_SHA384;
-
 %%% ECDHE_PSK with AES-GCM and AES-CCM Cipher Suites, draft-ietf-tls-ecdhe-psk-aead-05
-
-suite({ecdhe_psk, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := ecdhe_psk, 
+       cipher := aes_128_gcm, 
+       mac := null, 
+       prf := sha256}) ->
     ?TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256;
-suite({ecdhe_psk, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := ecdhe_psk, 
+       cipher := aes_256_gcm, 
+       mac := null, 
+       prf := sha384}) ->
     ?TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384;
-%% suite({ecdhe_psk, aes_128_ccm, null, sha256}) ->
-%%     ?TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256;
-%% suite({ecdhe_psk, aes_256_ccm, null, sha256}) ->
-%%     ?TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256;
-
+ %% suite(#{key_exchange := ecdhe_psk, 
+ %%        cipher := aes_128_ccm, 
+ %%        mac := null, 
+ %%        prf := sha256}) ->
+ %%    ?TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256;
+ %% suite(#{key_exchange := ecdhe_psk, 
+ %%         cipher := aes_256_ccm, 
+ %%         mac := null, 
+ %%         prf := sha256}) ->
+ %%    ?TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256;
 %%% SRP Cipher Suites RFC 5054
-
-suite({srp_anon, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := srp_anon, 
+        cipher := '3des_ede_cbc',
+        mac :=  sha}) ->
     ?TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA;
-suite({srp_rsa, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := srp_rsa, 
+        cipher := '3des_ede_cbc',
+        mac := sha}) ->
     ?TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA;
-suite({srp_dss, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := srp_dss, 
+        cipher := '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA;
-suite({srp_anon, aes_128_cbc, sha}) ->
+suite(#{key_exchange := srp_anon, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_SRP_SHA_WITH_AES_128_CBC_SHA;
-suite({srp_rsa, aes_128_cbc, sha}) ->
+suite(#{key_exchange := srp_rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA;
-suite({srp_dss, aes_128_cbc, sha}) ->
+suite(#{key_exchange := srp_dss, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA;
-suite({srp_anon, aes_256_cbc, sha}) ->
+suite(#{key_exchange := srp_anon, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_SRP_SHA_WITH_AES_256_CBC_SHA;
-suite({srp_rsa, aes_256_cbc, sha}) ->
+suite(#{key_exchange := srp_rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA;
-suite({srp_dss, aes_256_cbc, sha}) ->
+suite(#{key_exchange := srp_dss, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA;
-
 %%% RFC 4492 EC TLS suites
-suite({ecdh_ecdsa, null, sha}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := null, 
+        mac := sha}) ->
     ?TLS_ECDH_ECDSA_WITH_NULL_SHA;
-suite({ecdh_ecdsa, rc4_128, sha}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := rc4_128,  
+        mac := sha})  ->
     ?TLS_ECDH_ECDSA_WITH_RC4_128_SHA;
-suite({ecdh_ecdsa, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA;
-suite({ecdh_ecdsa, aes_128_cbc, sha}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA;
-suite({ecdh_ecdsa, aes_256_cbc, sha}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA;
-
-suite({ecdhe_ecdsa, null, sha}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := null, 
+        mac := sha}) ->
     ?TLS_ECDHE_ECDSA_WITH_NULL_SHA;
-suite({ecdhe_ecdsa, rc4_128, sha}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := rc4_128, 
+        mac := sha}) ->
     ?TLS_ECDHE_ECDSA_WITH_RC4_128_SHA;
-suite({ecdhe_ecdsa, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA;
-suite({ecdhe_ecdsa, aes_128_cbc, sha}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA;
-suite({ecdhe_ecdsa, aes_256_cbc, sha}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA;
-
-suite({ecdh_rsa, null, sha}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := null, 
+        mac := sha}) ->
     ?TLS_ECDH_RSA_WITH_NULL_SHA;
-suite({ecdh_rsa, rc4_128, sha}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := rc4_128, 
+        mac := sha}) ->
     ?TLS_ECDH_RSA_WITH_RC4_128_SHA;
-suite({ecdh_rsa, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := '3des_ede_cbc', mac := sha}) ->
     ?TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA;
-suite({ecdh_rsa, aes_128_cbc, sha}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA;
-suite({ecdh_rsa, aes_256_cbc, sha}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA;
-
-suite({ecdhe_rsa, null, sha}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := null, 
+        mac := sha}) ->
     ?TLS_ECDHE_RSA_WITH_NULL_SHA;
-suite({ecdhe_rsa, rc4_128, sha}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := rc4_128, 
+        mac := sha}) ->
     ?TLS_ECDHE_RSA_WITH_RC4_128_SHA;
-suite({ecdhe_rsa, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := '3des_ede_cbc', 
+        mac := sha}) ->
     ?TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA;
-suite({ecdhe_rsa, aes_128_cbc, sha}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA;
-suite({ecdhe_rsa, aes_256_cbc, sha}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA;
-
-suite({ecdh_anon, null, sha}) ->
+suite(#{key_exchange := ecdh_anon, 
+        cipher := null, 
+        mac := sha}) ->
     ?TLS_ECDH_anon_WITH_NULL_SHA;
-suite({ecdh_anon, rc4_128, sha}) ->
+suite(#{key_exchange := ecdh_anon, 
+        cipher := rc4_128, 
+        mac := sha}) ->
     ?TLS_ECDH_anon_WITH_RC4_128_SHA;
-suite({ecdh_anon, '3des_ede_cbc', sha}) ->
+suite(#{key_exchange := ecdh_anon, 
+        cipher := '3des_ede_cbc', 
+        mac :=  sha}) ->
     ?TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA;
-suite({ecdh_anon, aes_128_cbc, sha}) ->
+suite(#{key_exchange := ecdh_anon, 
+        cipher := aes_128_cbc, 
+        mac := sha}) ->
     ?TLS_ECDH_anon_WITH_AES_128_CBC_SHA;
-suite({ecdh_anon, aes_256_cbc, sha}) ->
+suite(#{key_exchange := ecdh_anon, 
+        cipher := aes_256_cbc, 
+        mac := sha}) ->
     ?TLS_ECDH_anon_WITH_AES_256_CBC_SHA;
-
 %%% RFC 5289 EC TLS suites
-suite({ecdhe_ecdsa, aes_128_cbc, sha256, sha256}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := aes_128_cbc, 
+        mac:= sha256, 
+        prf := sha256}) ->
     ?TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256;
-suite({ecdhe_ecdsa, aes_256_cbc, sha384, sha384}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := aes_256_cbc, 
+        mac := sha384, 
+        prf := sha384}) ->
     ?TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384;
-suite({ecdh_ecdsa, aes_128_cbc, sha256, sha256}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := aes_128_cbc, 
+        mac := sha256, 
+        prf := sha256}) ->
     ?TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256;
-suite({ecdh_ecdsa, aes_256_cbc, sha384, sha384}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := aes_256_cbc, 
+        mac := sha384, 
+        prf := sha384}) ->
     ?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384;
-suite({ecdhe_rsa, aes_128_cbc, sha256, sha256}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha256, 
+        prf := sha256}) ->
     ?TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256;
-suite({ecdhe_rsa, aes_256_cbc, sha384, sha384}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha384, 
+        prf := sha384}) ->
     ?TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384;
-suite({ecdh_rsa, aes_128_cbc, sha256, sha256}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := aes_128_cbc, 
+        mac := sha256, 
+        prf := sha256}) ->
     ?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256;
-suite({ecdh_rsa, aes_256_cbc, sha384, sha384}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := aes_256_cbc, 
+        mac := sha384, 
+        prf := sha384}) ->
     ?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384;
-
 %% RFC 5288 AES-GCM Cipher Suites
-suite({rsa, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := rsa, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_RSA_WITH_AES_128_GCM_SHA256;
-suite({rsa, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := rsa, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_RSA_WITH_AES_256_GCM_SHA384;
-suite({dhe_rsa, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_DHE_RSA_WITH_AES_128_GCM_SHA256;
-suite({dhe_rsa, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_DHE_RSA_WITH_AES_256_GCM_SHA384;
-suite({dh_rsa, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := dh_rsa, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_DH_RSA_WITH_AES_128_GCM_SHA256;
-suite({dh_rsa, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := dh_rsa, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_DH_RSA_WITH_AES_256_GCM_SHA384;
-suite({dhe_dss, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := dhe_dss, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_DHE_DSS_WITH_AES_128_GCM_SHA256;
-suite({dhe_dss, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := dhe_dss, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_DHE_DSS_WITH_AES_256_GCM_SHA384;
-suite({dh_dss, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := dh_dss, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_DH_DSS_WITH_AES_128_GCM_SHA256;
-suite({dh_dss, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := dh_dss, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_DH_DSS_WITH_AES_256_GCM_SHA384;
-suite({dh_anon, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_DH_anon_WITH_AES_128_GCM_SHA256;
-suite({dh_anon, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := dh_anon, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_DH_anon_WITH_AES_256_GCM_SHA384;
-
 %% RFC 5289 ECC AES-GCM Cipher Suites
-suite({ecdhe_ecdsa, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256;
-suite({ecdhe_ecdsa, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384;
-suite({ecdh_ecdsa, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256;
-suite({ecdh_ecdsa, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := ecdh_ecdsa, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384;
-suite({ecdhe_rsa, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256;
-suite({ecdhe_rsa, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384;
-suite({ecdh_rsa, aes_128_gcm, null, sha256}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := aes_128_gcm, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256;
-suite({ecdh_rsa, aes_256_gcm, null, sha384}) ->
+suite(#{key_exchange := ecdh_rsa, 
+        cipher := aes_256_gcm, 
+        mac := aead, 
+        prf := sha384}) ->
     ?TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384;
-
-
 %% draft-agl-tls-chacha20poly1305-04 Chacha20/Poly1305 Suites
-suite({ecdhe_rsa, chacha20_poly1305, null, sha256}) ->
+suite(#{key_exchange := ecdhe_rsa, 
+        cipher := chacha20_poly1305,  
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256;
-suite({ecdhe_ecdsa, chacha20_poly1305, null, sha256}) ->
+suite(#{key_exchange := ecdhe_ecdsa, 
+        cipher := chacha20_poly1305, 
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256;
-suite({dhe_rsa, chacha20_poly1305, null, sha256}) ->
+suite(#{key_exchange := dhe_rsa, 
+        cipher := chacha20_poly1305,  
+        mac := aead, 
+        prf := sha256}) ->
     ?TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256.
 
 %%--------------------------------------------------------------------
@@ -1298,9 +2033,9 @@ openssl_suite("ECDH-RSA-AES256-GCM-SHA384") ->
     ?TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384.
 
 %%--------------------------------------------------------------------
--spec openssl_suite_name(cipher_suite()) -> openssl_cipher_suite().
+-spec openssl_suite_name(cipher_suite()) -> openssl_cipher_suite() | erl_cipher_suite().
 %%
-%% Description: Return openssl cipher suite name.
+%% Description: Return openssl cipher suite name if possible
 %%-------------------------------------------------------------------
 openssl_suite_name(?TLS_DHE_RSA_WITH_AES_256_CBC_SHA) ->
     "DHE-RSA-AES256-SHA";
@@ -1510,36 +2245,74 @@ filter(DerCert, Ciphers) ->
 	{_, ecdsa} ->
 	    Ciphers1 -- rsa_signed_suites()
     end.
-	
 %%--------------------------------------------------------------------
--spec filter_suites([cipher_suite()]) -> [cipher_suite()].
+-spec filter_suites([erl_cipher_suite()] | [cipher_suite()], map()) ->
+                           [erl_cipher_suite()] |  [cipher_suite()].
+%%
+%% Description: Filter suites using supplied filter funs
+%%-------------------------------------------------------------------	
+filter_suites(Suites, Filters) ->
+    ApplyFilters = fun(Suite) ->
+                           filter_suite(Suite, Filters)
+                   end,
+    lists:filter(ApplyFilters, Suites).
+    
+filter_suite(#{key_exchange := KeyExchange, 
+               cipher := Cipher, 
+               mac := Hash,
+               prf := Prf}, 
+             #{key_exchange_filters := KeyFilters,
+               cipher_filters := CipherFilters, 
+               mac_filters := HashFilters,
+               prf_filters := PrfFilters}) ->
+    all_filters(KeyExchange, KeyFilters) andalso
+        all_filters(Cipher, CipherFilters) andalso
+        all_filters(Hash, HashFilters) andalso
+        all_filters(Prf, PrfFilters);
+filter_suite(Suite, Filters) ->
+    filter_suite(suite_definition(Suite), Filters).
+
+%%--------------------------------------------------------------------
+-spec filter_suites([erl_cipher_suite()] | [cipher_suite()]) -> 
+                           [erl_cipher_suite()] | [cipher_suite()].
 %%
 %% Description: Filter suites for algorithms supported by crypto.
 %%-------------------------------------------------------------------
-filter_suites(Suites = [Value|_]) when is_tuple(Value) ->
-    Algos = crypto:supports(),
-    Hashs =  proplists:get_value(hashs, Algos),
-    lists:filter(fun({KeyExchange, Cipher, Hash}) ->
-			 is_acceptable_keyexchange(KeyExchange,  proplists:get_value(public_keys, Algos)) andalso
-			     is_acceptable_cipher(Cipher,  proplists:get_value(ciphers, Algos)) andalso
-			     is_acceptable_hash(Hash,  proplists:get_value(hashs, Algos));
-		    ({KeyExchange, Cipher, Hash, Prf}) ->
-			 is_acceptable_keyexchange(KeyExchange, proplists:get_value(public_keys, Algos)) andalso
-			     is_acceptable_cipher(Cipher, proplists:get_value(ciphers, Algos)) andalso
-			     is_acceptable_hash(Hash, Hashs) andalso
-			     is_acceptable_prf(Prf, Hashs)
-		 end, Suites);
-
 filter_suites(Suites) ->
+    Filters = crypto_support_filters(),
+    filter_suites(Suites, Filters).
+
+all_filters(_, []) ->
+    true;
+all_filters(Value, [Filter| Rest]) ->
+    case Filter(Value) of
+        true ->
+            all_filters(Value, Rest);
+        false ->
+            false
+    end.
+crypto_support_filters() ->
     Algos = crypto:supports(),
     Hashs =  proplists:get_value(hashs, Algos),
-    lists:filter(fun(Suite) ->
-			 {KeyExchange, Cipher, Hash, Prf} = ssl_cipher:suite_definition(Suite),
-			 is_acceptable_keyexchange(KeyExchange, proplists:get_value(public_keys, Algos)) andalso
-			     is_acceptable_cipher(Cipher,  proplists:get_value(ciphers, Algos)) andalso
-			     is_acceptable_hash(Hash, Hashs) andalso
-			     is_acceptable_prf(Prf, Hashs)
-		 end, Suites).
+    #{key_exchange_filters => 
+          [fun(KeyExchange) ->
+                  is_acceptable_keyexchange(KeyExchange,  
+                                            proplists:get_value(public_keys, Algos))
+           end],
+      cipher_filters => 
+          [fun(Cipher) ->
+                  is_acceptable_cipher(Cipher,  
+                                       proplists:get_value(ciphers, Algos))
+           end],
+      mac_filters => 
+          [fun(Hash) ->
+                  is_acceptable_hash(Hash, Hashs)
+          end],
+      prf_filters => 
+          [fun(Prf) ->
+                  is_acceptable_prf(Prf,  
+                                    proplists:get_value(hashs, Algos))
+          end]}.
 
 is_acceptable_keyexchange(KeyExchange, _Algos) when KeyExchange == psk;
                                                     KeyExchange == null ->
@@ -1599,6 +2372,8 @@ is_acceptable_cipher(Cipher, Algos) ->
 
 is_acceptable_hash(null, _Algos) ->
     true;
+is_acceptable_hash(aead, _Algos) ->
+    true;
 is_acceptable_hash(Hash, Algos) ->
     proplists:get_bool(Hash, Algos).
 
@@ -1630,7 +2405,7 @@ calc_mac_hash(Type, Version,
 	     MacSecret, SeqNo, Type,
 	     Length, PlainFragment).
 
-is_stream_ciphersuite({_, rc4_128, _, _}) ->
+is_stream_ciphersuite(#{cipher := rc4_128}) ->
     true;
 is_stream_ciphersuite(_) ->
     false.
@@ -1758,6 +2533,11 @@ prf_algorithm(default_prf, {3, _}) ->
 prf_algorithm(Algo, _) ->
     hash_algorithm(Algo).
 
+mac_algorithm(aead) ->
+    aead;
+mac_algorithm(Algo) ->
+    hash_algorithm(Algo).
+
 hash_algorithm(null)   -> ?NULL;
 hash_algorithm(md5)    -> ?MD5;
 hash_algorithm(sha)   -> ?SHA; %% Only sha always refers to "SHA-1"
@@ -1788,6 +2568,10 @@ sign_algorithm(Other) when is_integer(Other) andalso ((Other >= 224) and (Other
 
 hash_size(null) ->
     0;
+%% The AEAD MAC hash size is not used in the context 
+%% of calculating the master secret. See RFC 5246 Section 6.2.3.3.
+hash_size(aead) ->
+    0;
 hash_size(md5) ->
     16;
 hash_size(sha) ->
diff --git a/lib/ssl/src/ssl_config.erl b/lib/ssl/src/ssl_config.erl
index e4611995ec..022fb7eac0 100644
--- a/lib/ssl/src/ssl_config.erl
+++ b/lib/ssl/src/ssl_config.erl
@@ -91,7 +91,15 @@ init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, server
     end;
 init_certificates(Cert, Config, _, _) ->
     {ok, Config#{own_certificate => Cert}}.
-        
+init_private_key(_, #{algorithm := Alg} = Key, <<>>, _Password, _Client) when Alg == ecdsa;
+                                                                              Alg == rsa;
+                                                                              Alg == dss ->
+    case maps:is_key(engine, Key) andalso maps:is_key(key_id, Key) of
+        true ->
+            Key;
+        false ->
+            throw({key, {invalid_key_id, Key}})
+    end;
 init_private_key(_, undefined, <<>>, _Password, _Client) ->
     undefined;
 init_private_key(DbHandle, undefined, KeyFile, Password, _) ->
diff --git a/lib/ssl/src/ssl_connection.erl b/lib/ssl/src/ssl_connection.erl
index 56ba952e67..f493c93726 100644
--- a/lib/ssl/src/ssl_connection.erl
+++ b/lib/ssl/src/ssl_connection.erl
@@ -44,33 +44,35 @@
 -export([send/2, recv/3, close/2, shutdown/2,
 	 new_user/2, get_opts/2, set_opts/2, 
 	 peer_certificate/1, renegotiation/1, negotiated_protocol/1, prf/5,
-         get_sslsocket/1, handshake_complete/3,
-	 connection_information/2, handle_common_event/5
+	 connection_information/2
 	]).
 
+%% Alert and close handling
+-export([handle_own_alert/4, handle_alert/3, 
+	 handle_normal_shutdown/3, stop/2, stop_and_reply/3
+	]).
+
+%% Data handling
+-export([write_application_data/3, read_application_data/2]).
+
+%% Help functions for tls|dtls_connection.erl
+-export([handle_session/7, ssl_config/3,
+	 prepare_connection/2, hibernate_after/3]).
+
 %% General gen_statem state functions with extra callback argument 
 %% to determine if it is an SSL/TLS or DTLS gen_statem machine
--export([init/4, hello/4, abbreviated/4, certify/4, cipher/4,
+-export([init/4, error/4, hello/4, abbreviated/4, certify/4, cipher/4,
          connection/4, death_row/4, downgrade/4]).
 
 %% gen_statem callbacks
 -export([terminate/3, format_status/2]).
 
-%%
--export([handle_info/3, handle_call/5, handle_session/7, ssl_config/3,
-	 prepare_connection/2, hibernate_after/3]).
-
-%% Alert and close handling
--export([handle_own_alert/4,handle_alert/3, 
-	 handle_normal_shutdown/3 
-	]).
-
-%% Data handling
--export([write_application_data/3, read_application_data/2]).
+%% Erlang Distribution export
+-export([get_sslsocket/1, handshake_complete/3]).
 
 %%====================================================================
-%% Internal application API
-%%====================================================================	     
+%% Setup
+%%====================================================================
 %%--------------------------------------------------------------------
 -spec connect(tls_connection | dtls_connection,
 	      host(), inet:port_number(), 
@@ -166,6 +168,16 @@ socket_control(dtls_connection = Connection, {_, Socket}, Pid, Transport, Listen
 	{error, Reason}	->
 	    {error, Reason}
     end.
+
+start_or_recv_cancel_timer(infinity, _RecvFrom) ->
+    undefined;
+start_or_recv_cancel_timer(Timeout, RecvFrom) ->
+    erlang:send_after(Timeout, self(), {cancel_start_or_recv, RecvFrom}).
+
+%%====================================================================
+%% User events
+%%====================================================================
+
 %%--------------------------------------------------------------------
 -spec send(pid(), iodata()) -> ok | {error, reason()}.
 %%
@@ -281,6 +293,197 @@ handshake_complete(ConnectionPid, Node, DHandle) ->
 prf(ConnectionPid, Secret, Label, Seed, WantedLength) ->
     call(ConnectionPid, {prf, Secret, Label, Seed, WantedLength}).
 
+%%====================================================================
+%% Alert and close handling
+%%====================================================================
+handle_own_alert(Alert, Version, StateName, 
+		 #state{role = Role,
+                        transport_cb = Transport,
+                        socket = Socket,
+                        protocol_cb = Connection,
+                        connection_states = ConnectionStates,
+                        ssl_options = SslOpts} = State) ->
+    try %% Try to tell the other side
+	{BinMsg, _} =
+	Connection:encode_alert(Alert, Version, ConnectionStates),
+	Connection:send(Transport, Socket, BinMsg)
+    catch _:_ ->  %% Can crash if we are in a uninitialized state
+	    ignore
+    end,
+    try %% Try to tell the local user
+	log_alert(SslOpts#ssl_options.log_alert, Role, Connection:protocol_name(), StateName, Alert#alert{role = Role}),
+	handle_normal_shutdown(Alert,StateName, State)
+    catch _:_ ->
+	    ok
+    end,
+    stop({shutdown, own_alert}, State).
+
+handle_normal_shutdown(Alert, _, #state{socket = Socket,
+					transport_cb = Transport,
+					protocol_cb = Connection,
+					start_or_recv_from = StartFrom,
+					tracker = Tracker,
+					role = Role, renegotiation = {false, first}}) ->
+    alert_user(Transport, Tracker,Socket, StartFrom, Alert, Role, Connection);
+
+handle_normal_shutdown(Alert, StateName, #state{socket = Socket,
+						socket_options = Opts,
+						transport_cb = Transport,
+						protocol_cb = Connection,
+						user_application = {_Mon, Pid},
+						tracker = Tracker,
+						start_or_recv_from = RecvFrom, role = Role}) ->
+    alert_user(Transport, Tracker, Socket, StateName, Opts, Pid, RecvFrom, Alert, Role, Connection).
+
+handle_alert(#alert{level = ?FATAL} = Alert, StateName,
+	     #state{socket = Socket, transport_cb = Transport, 
+		    protocol_cb = Connection,
+		    ssl_options = SslOpts, start_or_recv_from = From, host = Host,
+		    port = Port, session = Session, user_application = {_Mon, Pid},
+		    role = Role, socket_options = Opts, tracker = Tracker} = State) ->
+    invalidate_session(Role, Host, Port, Session),
+    log_alert(SslOpts#ssl_options.log_alert, Role, Connection:protocol_name(), 
+              StateName, Alert#alert{role = opposite_role(Role)}),
+    alert_user(Transport, Tracker, Socket, StateName, Opts, Pid, From, Alert, Role, Connection),
+    stop(normal, State);
+
+handle_alert(#alert{level = ?WARNING, description = ?CLOSE_NOTIFY} = Alert, 
+	     StateName, State) -> 
+    handle_normal_shutdown(Alert, StateName, State),
+    stop({shutdown, peer_close}, State);
+
+handle_alert(#alert{level = ?WARNING, description = ?NO_RENEGOTIATION} = Alert, StateName, 
+	     #state{role = Role, ssl_options = SslOpts, protocol_cb = Connection, renegotiation = {true, internal}} = State) ->
+    log_alert(SslOpts#ssl_options.log_alert, Role, 
+              Connection:protocol_name(), StateName, Alert#alert{role = opposite_role(Role)}),
+    handle_normal_shutdown(Alert, StateName, State),
+    stop({shutdown, peer_close}, State);
+
+handle_alert(#alert{level = ?WARNING, description = ?NO_RENEGOTIATION} = Alert, StateName, 
+	     #state{role = Role,
+                    ssl_options = SslOpts, renegotiation = {true, From},
+		    protocol_cb = Connection} = State0) ->
+    log_alert(SslOpts#ssl_options.log_alert,  Role,
+              Connection:protocol_name(), StateName, Alert#alert{role = opposite_role(Role)}),
+    gen_statem:reply(From, {error, renegotiation_rejected}),
+    {Record, State1} = Connection:next_record(State0),
+    %% Go back to connection!
+    State = Connection:reinit_handshake_data(State1#state{renegotiation = undefined}),
+    Connection:next_event(connection, Record, State);
+
+%% Gracefully log and ignore all other warning alerts
+handle_alert(#alert{level = ?WARNING} = Alert, StateName,
+	     #state{ssl_options = SslOpts, protocol_cb = Connection, role = Role} = State0) ->
+    log_alert(SslOpts#ssl_options.log_alert,  Role,
+              Connection:protocol_name(), StateName, Alert#alert{role = opposite_role(Role)}),
+    {Record, State} = Connection:next_record(State0),
+    Connection:next_event(StateName, Record, State).
+
+%%====================================================================
+%% Data handling
+%%====================================================================
+write_application_data(Data0, {FromPid, _} = From,
+		       #state{socket = Socket,
+			      negotiated_version = Version,
+			      protocol_cb = Connection,
+			      transport_cb = Transport,
+			      connection_states = ConnectionStates0,
+			      socket_options = SockOpts,
+			      ssl_options = #ssl_options{renegotiate_at = RenegotiateAt}} = State) ->
+    Data = encode_packet(Data0, SockOpts),
+    
+    case time_to_renegotiate(Data, ConnectionStates0, RenegotiateAt) of
+	true ->
+	    Connection:renegotiate(State#state{renegotiation = {true, internal}}, 
+			[{next_event, {call, From}, {application_data, Data0}}]);
+	false ->
+	    {Msgs, ConnectionStates} =
+                Connection:encode_data(Data, Version, ConnectionStates0),
+            NewState = State#state{connection_states = ConnectionStates},
+	    case Connection:send(Transport, Socket, Msgs) of
+                ok when FromPid =:= self() ->
+                    hibernate_after(connection, NewState, []);
+                Error when FromPid =:= self() ->
+                    stop({shutdown, Error}, NewState);
+                ok ->
+                    hibernate_after(connection, NewState, [{reply, From, ok}]);
+                Result ->
+                    hibernate_after(connection, NewState, [{reply, From, Result}])
+            end
+    end.
+
+read_application_data(Data, #state{user_application = {_Mon, Pid},
+				   socket = Socket,
+				   protocol_cb = Connection,
+				   transport_cb = Transport,
+				   socket_options = SOpts,
+				   bytes_to_read = BytesToRead,
+				   start_or_recv_from = RecvFrom,
+				   timer = Timer,
+				   user_data_buffer = Buffer0,
+				   tracker = Tracker} = State0) ->
+    Buffer1 = if 
+		  Buffer0 =:= <<>> -> Data;
+		  Data =:= <<>> -> Buffer0;
+		  true -> <<Buffer0/binary, Data/binary>>
+	      end,
+    case get_data(SOpts, BytesToRead, Buffer1) of
+	{ok, ClientData, Buffer} -> % Send data
+            case State0 of
+                #state{
+                   ssl_options = #ssl_options{erl_dist = true},
+                  protocol_specific = #{d_handle := DHandle}} ->
+                    State =
+                        State0#state{
+                          user_data_buffer = Buffer,
+                          bytes_to_read = undefined},
+                    try erlang:dist_ctrl_put_data(DHandle, ClientData) of
+                        _
+                          when SOpts#socket_options.active =:= false;
+                               Buffer =:= <<>> ->
+                            %% Passive mode, wait for active once or recv
+                            %% Active and empty, get more data
+                            Connection:next_record_if_active(State);
+                        _ -> %% We have more data
+                            read_application_data(<<>>, State)
+                    catch error:_ ->
+                            death_row(State, disconnect)
+                    end;
+                _ ->
+                    SocketOpt =
+                        deliver_app_data(
+                          Transport, Socket, SOpts,
+                          ClientData, Pid, RecvFrom, Tracker, Connection),
+                    cancel_timer(Timer),
+                    State =
+                        State0#state{
+                          user_data_buffer = Buffer,
+                          start_or_recv_from = undefined,
+                          timer = undefined,
+                          bytes_to_read = undefined,
+                          socket_options = SocketOpt
+                         },
+                    if
+                        SocketOpt#socket_options.active =:= false;
+                        Buffer =:= <<>> ->
+                            %% Passive mode, wait for active once or recv
+                            %% Active and empty, get more data
+                            Connection:next_record_if_active(State);
+                        true -> %% We have more data
+                            read_application_data(<<>>, State)
+                    end
+            end;
+	{more, Buffer} -> % no reply, we need more data
+	    Connection:next_record(State0#state{user_data_buffer = Buffer});
+	{passive, Buffer} ->
+	    Connection:next_record_if_active(State0#state{user_data_buffer = Buffer});
+	{error,_Reason} -> %% Invalid packet in packet mode
+	    deliver_packet_error(Transport, Socket, SOpts, Buffer1, Pid, RecvFrom, Tracker, Connection),
+            stop(normal, State0)
+    end.
+%%====================================================================
+%% Help functions for tls|dtls_connection.erl
+%%====================================================================
 %%--------------------------------------------------------------------
 -spec handle_session(#server_hello{}, ssl_record:ssl_version(),
 		     binary(), ssl_record:connection_states(), _,_, #state{}) ->
@@ -292,7 +495,7 @@ handle_session(#server_hello{cipher_suite = CipherSuite,
 	       #state{session = #session{session_id = OldId},
 		      negotiated_version = ReqVersion,
 		      negotiated_protocol = CurrentProtocol} = State0) ->
-    {KeyAlgorithm, _, _, _} =
+    #{key_exchange := KeyAlgorithm} =
 	ssl_cipher:suite_definition(CipherSuite),
     
     PremasterSecret = make_premaster_secret(ReqVersion, KeyAlgorithm),
@@ -349,7 +552,7 @@ ssl_config(Opts, Role, State) ->
 		ssl_options = Opts}.
 
 %%====================================================================
-%% gen_statem state functions
+%% gen_statem general state functions with connection cb argument
 %%====================================================================	
 %%--------------------------------------------------------------------
 -spec init(gen_statem:event_type(),
@@ -378,7 +581,7 @@ init({call, From}, {start, {Opts, EmOpts}, Timeout},
 	init({call, From}, {start, Timeout}, 
 	     State#state{ssl_options = SslOpts, socket_options = new_emulated(EmOpts, SockOpts)}, Connection)
     catch throw:Error ->
-	    {stop_and_reply, normal, {reply, From, {error, Error}}}
+	    stop_and_reply(normal, {reply, From, {error, Error}}, State0)
     end;
 init({call, From}, Msg, State, Connection) ->
     handle_call(Msg, From, ?FUNCTION_NAME, State, Connection);
@@ -386,6 +589,15 @@ init(_Type, _Event, _State, _Connection) ->
     {keep_state_and_data, [postpone]}.
 	
 %%--------------------------------------------------------------------
+-spec error(gen_statem:event_type(),
+	   {start, timeout()} | term(), #state{},
+            tls_connection | dtls_connection) ->
+		   gen_statem:state_function_result().
+%%--------------------------------------------------------------------
+error({call, From}, Msg, State, Connection) ->
+    handle_call(Msg, From, ?FUNCTION_NAME, State, Connection).
+
+%%--------------------------------------------------------------------
 -spec hello(gen_statem:event_type(),
 	    #hello_request{} | #server_hello{} | term(),
 	    #state{}, tls_connection | dtls_connection) ->
@@ -408,7 +620,6 @@ hello(Type, Msg, State, Connection) ->
 %%--------------------------------------------------------------------
 abbreviated({call, From}, Msg, State, Connection) ->
     handle_call(Msg, From, ?FUNCTION_NAME, State, Connection);
-
 abbreviated(internal, #finished{verify_data = Data} = Finished,
 	    #state{role = server,
 		   negotiated_version = Version,
@@ -429,7 +640,6 @@ abbreviated(internal, #finished{verify_data = Data} = Finished,
 	#alert{} = Alert ->
 	    handle_own_alert(Alert, Version, ?FUNCTION_NAME, State0)
     end;
-
 abbreviated(internal, #finished{verify_data = Data} = Finished,
 	    #state{role = client, tls_handshake_history = Handshake0,
 		   session = #session{master_secret = MasterSecret},
@@ -449,7 +659,6 @@ abbreviated(internal, #finished{verify_data = Data} = Finished,
 	#alert{} = Alert ->
 	    handle_own_alert(Alert, Version, ?FUNCTION_NAME, State0)
     end;
-
 %% only allowed to send next_protocol message after change cipher spec
 %% & before finished message and it is not allowed during renegotiation
 abbreviated(internal, #next_protocol{selected_protocol = SelectedProtocol},
@@ -490,7 +699,6 @@ certify(internal, #certificate{asn1_certificates = []},
 	    State, _) ->
     Alert =  ?ALERT_REC(?FATAL,?HANDSHAKE_FAILURE),
     handle_own_alert(Alert, Version, ?FUNCTION_NAME, State);
-
 certify(internal, #certificate{asn1_certificates = []},
 	#state{role = server,
 	       ssl_options = #ssl_options{verify = verify_peer,
@@ -499,7 +707,6 @@ certify(internal, #certificate{asn1_certificates = []},
     {Record, State} = 
 	Connection:next_record(State0#state{client_certificate_requested = false}),
     Connection:next_event(?FUNCTION_NAME, Record, State);
-
 certify(internal, #certificate{},
 	#state{role = server,
 	       negotiated_version = Version,
@@ -507,23 +714,22 @@ certify(internal, #certificate{},
 	    State, _) ->
     Alert =  ?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE, unrequested_certificate),
     handle_own_alert(Alert, Version, ?FUNCTION_NAME, State);
-
 certify(internal, #certificate{} = Cert,
         #state{negotiated_version = Version,
 	       role = Role,
+               host = Host,
 	       cert_db = CertDbHandle,
 	       cert_db_ref = CertDbRef,
 	       crl_db = CRLDbInfo,
 	       ssl_options = Opts} = State, Connection) ->
     case ssl_handshake:certify(Cert, CertDbHandle, CertDbRef, 
-			       Opts, CRLDbInfo, Role) of
+			       Opts, CRLDbInfo, Role, Host) of
         {PeerCert, PublicKeyInfo} ->
 	    handle_peer_cert(Role, PeerCert, PublicKeyInfo,
 			     State#state{client_certificate_requested = false}, Connection);
 	#alert{} = Alert ->
             handle_own_alert(Alert, Version, ?FUNCTION_NAME, State)
     end;
-
 certify(internal, #server_key_exchange{exchange_keys = Keys},
         #state{role = client, negotiated_version = Version,
 	       key_algorithm = Alg,
@@ -556,7 +762,6 @@ certify(internal, #server_key_exchange{exchange_keys = Keys},
 						Version, ?FUNCTION_NAME, State)
 	    end
     end;
-
 certify(internal, #certificate_request{},
 	#state{role = client, negotiated_version = Version,
                key_algorithm = Alg} = State, _)
@@ -564,8 +769,7 @@ certify(internal, #certificate_request{},
        Alg == psk; Alg == dhe_psk; Alg == ecdhe_psk; Alg == rsa_psk;
        Alg == srp_dss; Alg == srp_rsa; Alg == srp_anon ->
     handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE),
-                     Version, certify, State);
-
+                     Version, ?FUNCTION_NAME, State);
 certify(internal, #certificate_request{} = CertRequest,
 	#state{session = #session{own_certificate = Cert},
 	       role = client,
@@ -579,7 +783,6 @@ certify(internal, #certificate_request{} = CertRequest,
 	    Connection:next_event(?FUNCTION_NAME, Record,
 				  State#state{cert_hashsign_algorithm = NegotiatedHashSign})
     end;
-
 %% PSK and RSA_PSK might bypass the Server-Key-Exchange
 certify(internal, #server_hello_done{},
 	#state{session = #session{master_secret = undefined},
@@ -598,7 +801,6 @@ certify(internal, #server_hello_done{},
 				  State0#state{premaster_secret = PremasterSecret}),
 	    client_certify_and_key_exchange(State, Connection)
     end;
-
 certify(internal, #server_hello_done{},
 	#state{session = #session{master_secret = undefined},
 	       ssl_options = #ssl_options{user_lookup_fun = PSKLookup},
@@ -619,7 +821,6 @@ certify(internal, #server_hello_done{},
 				  State0#state{premaster_secret = RSAPremasterSecret}),
 	    client_certify_and_key_exchange(State, Connection)
     end;
-
 %% Master secret was determined with help of server-key exchange msg
 certify(internal, #server_hello_done{}, 
 	#state{session = #session{master_secret = MasterSecret} = Session,
@@ -635,7 +836,6 @@ certify(internal, #server_hello_done{},
 	#alert{} = Alert ->
 	    handle_own_alert(Alert, Version, ?FUNCTION_NAME, State0)
     end;
-
 %% Master secret is calculated from premaster_secret
 certify(internal, #server_hello_done{},
 	#state{session = Session0,
@@ -653,7 +853,6 @@ certify(internal, #server_hello_done{},
 	#alert{} = Alert ->
 	    handle_own_alert(Alert, Version, ?FUNCTION_NAME, State0)
     end;
-
 certify(internal = Type, #client_key_exchange{} = Msg,
 	#state{role = server,
 	       client_certificate_requested = true,
@@ -661,7 +860,6 @@ certify(internal = Type, #client_key_exchange{} = Msg,
 	Connection) ->
     %% We expect a certificate here
     handle_common_event(Type, Msg, ?FUNCTION_NAME, State, Connection);
-
 certify(internal, #client_key_exchange{exchange_keys = Keys},
 	State = #state{key_algorithm = KeyAlg, negotiated_version = Version}, Connection) ->
     try
@@ -671,7 +869,6 @@ certify(internal, #client_key_exchange{exchange_keys = Keys},
 	#alert{} = Alert ->
 	    handle_own_alert(Alert, Version, ?FUNCTION_NAME, State)
     end;
-
 certify(Type, Msg, State, Connection) ->
     handle_common_event(Type, Msg, ?FUNCTION_NAME, State, Connection).
  
@@ -683,10 +880,8 @@ certify(Type, Msg, State, Connection) ->
 %%--------------------------------------------------------------------
 cipher({call, From}, Msg, State, Connection) ->
     handle_call(Msg, From, ?FUNCTION_NAME, State, Connection);
-
 cipher(info, Msg, State, _) ->
     handle_info(Msg, ?FUNCTION_NAME, State);
-
 cipher(internal, #certificate_verify{signature = Signature, 
 				     hashsign_algorithm = CertHashSign},
        #state{role = server,
@@ -709,14 +904,12 @@ cipher(internal, #certificate_verify{signature = Signature,
 	#alert{} = Alert ->
 	    handle_own_alert(Alert, Version, ?FUNCTION_NAME, State0)
     end;
-
 %% client must send a next protocol message if we are expecting it
 cipher(internal, #finished{},
        #state{role = server, expecting_next_protocol_negotiation = true,
 	      negotiated_protocol = undefined, negotiated_version = Version} = State0,
        _Connection) ->
     handle_own_alert(?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE), Version, ?FUNCTION_NAME, State0);
-
 cipher(internal, #finished{verify_data = Data} = Finished,
        #state{negotiated_version = Version,
 	      host = Host,
@@ -725,6 +918,7 @@ cipher(internal, #finished{verify_data = Data} = Finished,
 	      expecting_finished = true,
 	      session = #session{master_secret = MasterSecret}
 	      = Session0,
+              ssl_options = SslOpts,
 	      connection_states = ConnectionStates0,
 	      tls_handshake_history = Handshake0} = State, Connection) ->
     case ssl_handshake:verify_connection(ssl:tls_version(Version), Finished,
@@ -732,13 +926,12 @@ cipher(internal, #finished{verify_data = Data} = Finished,
 					 get_current_prf(ConnectionStates0, read),
 					 MasterSecret, Handshake0) of
         verified ->
-	    Session = register_session(Role, Host, Port, Session0),
+	    Session = register_session(Role, host_id(Role, Host, SslOpts), Port, Session0),
 	    cipher_role(Role, Data, Session, 
 			State#state{expecting_finished = false}, Connection);
         #alert{} = Alert ->
 	    handle_own_alert(Alert, Version, ?FUNCTION_NAME, State)
     end;
-
 %% only allowed to send next_protocol message after change cipher spec
 %% & before finished message and it is not allowed during renegotiation
 cipher(internal, #next_protocol{selected_protocol = SelectedProtocol},
@@ -773,7 +966,7 @@ connection({call, {FromPid, _} = From}, {application_data, Data},
      catch throw:Error ->
              case self() of
                  FromPid ->
-                     {stop, {shutdown, Error}};
+                     stop({shutdown, Error}, State);
                  _ ->
                      hibernate_after(
                        ?FUNCTION_NAME, State, [{reply, From, Error}])
@@ -824,8 +1017,8 @@ connection(
                       ProtocolSpecific#{d_handle => DHandle}},
             {Record, NewerState} = Connection:next_record_if_active(NewState),
             Connection:next_event(connection, Record, NewerState, [{reply, From, ok}])
-    catch _:Reason ->
-            death_row(State, Reason)
+    catch error:_ ->
+            death_row(State, disconnect)
     end;
 connection({call, From}, Msg, State, Connection) ->
     handle_call(Msg, From, ?FUNCTION_NAME, State, Connection);
@@ -837,10 +1030,24 @@ connection(
   _) ->
     eat_msgs(Msg),
     try send_dist_data(?FUNCTION_NAME, State, DHandle, [])
-    catch _:Reason ->
-            death_row(State, Reason)
+    catch error:_ ->
+            death_row(State, disconnect)
     end;
 connection(
+  info, {send, From, Ref, Data},
+  #state{
+     ssl_options = #ssl_options{erl_dist = true},
+     protocol_specific = #{d_handle := _}},
+  _) ->
+    %% This is for testing only!
+    %%
+    %% Needed by some OTP distribution
+    %% test suites...
+    From ! {Ref, ok},
+    {keep_state_and_data,
+     [{next_event, {call, {self(), undefined}},
+       {application_data, iolist_to_binary(Data)}}]};
+connection(
   info, tick = Msg,
   #state{
      ssl_options = #ssl_options{erl_dist = true},
@@ -865,20 +1072,22 @@ connection(Type, Msg, State, Connection) ->
 %% or the socket may die too
 death_row(
   info, {'DOWN', MonitorRef, _, _, Reason},
-  #state{user_application={MonitorRef,_Pid} = State},
+  #state{user_application={MonitorRef,_Pid}},
   _) ->
-    {stop, {shutdown, Reason}, State};
+    {stop, {shutdown, Reason}};
 death_row(
-  info, {'EXIT', Socket, Reason}, #state{socket = Socket} = State, _) ->
-    {stop, {shutdown, Reason}, State};
+  info, {'EXIT', Socket, Reason}, #state{socket = Socket}, _) ->
+    {stop, {shutdown, Reason}};
 death_row(state_timeout, Reason, _State, _Connection) ->
     {stop, {shutdown,Reason}};
-death_row(_Type, _Msg, State, _Connection) ->
-    {keep_state, State, [postpone]}.
+death_row(_Type, _Msg, _State, _Connection) ->
+    %% Waste all other events
+    keep_state_and_data.
 
 %% State entry function
 death_row(State, Reason) ->
-    {next_state, death_row, State, [{state_timeout, 5000, Reason}]}.
+    {next_state, death_row, State,
+     [{state_timeout, 5000, Reason}]}.
 
 %%--------------------------------------------------------------------
 -spec downgrade(gen_statem:event_type(), term(), 
@@ -891,10 +1100,10 @@ downgrade(internal, #alert{description = ?CLOSE_NOTIFY},
     tls_socket:setopts(Transport, Socket, [{active, false}, {packet, 0}, {mode, binary}]),
     Transport:controlling_process(Socket, Pid),
     gen_statem:reply(From, {ok, Socket}),
-    stop_normal(State);
+    stop(normal, State);
 downgrade(timeout, downgrade, #state{downgrade = {_, From}} = State, _) ->
     gen_statem:reply(From, {error, timeout}),
-    stop_normal(State);
+    stop(normal, State);
 downgrade(Type, Event, State, Connection) ->
     handle_common_event(Type, Event, ?FUNCTION_NAME, State, Connection).
 
@@ -909,9 +1118,8 @@ handle_common_event(internal, {handshake, {#hello_request{} = Handshake, _}}, co
 handle_common_event(internal, {handshake, {#hello_request{}, _}}, StateName, #state{role = client}, _) 
   when StateName =/= connection ->
     {keep_state_and_data};
-handle_common_event(internal, {handshake, {Handshake, Raw}}, StateName, 
-		    #state{tls_handshake_history = Hs0,
-			   ssl_options = #ssl_options{v2_hello_compatible = V2HComp}} = State0, 
+handle_common_event(internal, {handshake, {Handshake, Raw}}, StateName,
+		    #state{tls_handshake_history = Hs0} = State0,
 		    Connection) ->
    
     PossibleSNI = Connection:select_sni_extension(Handshake),
@@ -919,7 +1127,7 @@ handle_common_event(internal, {handshake, {Handshake, Raw}}, StateName,
     %% a client_hello, which needs to be determined by the connection callback.
     %% In other cases this is a noop
     State = handle_sni_extension(PossibleSNI, State0),
-    HsHist = ssl_handshake:update_handshake_history(Hs0, iolist_to_binary(Raw), V2HComp),
+    HsHist = ssl_handshake:update_handshake_history(Hs0, iolist_to_binary(Raw)),
     {next_state, StateName, State#state{tls_handshake_history = HsHist}, 
      [{next_event, internal, Handshake}]};
 handle_common_event(internal, {protocol_record, TLSorDTLSRecord}, StateName, State, Connection) -> 
@@ -928,8 +1136,8 @@ handle_common_event(timeout, hibernate, _, _, _) ->
     {keep_state_and_data, [hibernate]};
 handle_common_event(internal, {application_data, Data}, StateName, State0, Connection) ->
     case read_application_data(Data, State0) of
-	{stop, Reason, State} ->
-   	    {stop, Reason, State};
+	{stop, _, _} = Stop->
+            Stop;
 	{Record, State} ->
    	    Connection:next_event(StateName, Record, State)
     end;
@@ -939,8 +1147,8 @@ handle_common_event(internal, #change_cipher_spec{type = <<1>>}, StateName,
 				StateName, State);
 handle_common_event(_Type, Msg, StateName, #state{negotiated_version = Version} = State, 
 		    _) ->
-    Alert =  ?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE),
-    handle_own_alert(Alert, Version, {StateName, Msg}, State).
+    Alert =  ?ALERT_REC(?FATAL,?UNEXPECTED_MESSAGE, {unexpected_msg, Msg}),
+    handle_own_alert(Alert, Version, StateName, State).
 
 handle_call({application_data, _Data}, _, _, _, _) ->
     %% In renegotiation priorities handshake, send data when handshake is finished
@@ -958,8 +1166,9 @@ handle_call({close, _} = Close, From, StateName, State, Connection) ->
     %% Run terminate before returning so that the reuseaddr
     %% inet-option works properly
     Result = Connection:terminate(Close, StateName, State#state{terminated = true}),
-    {stop_and_reply, {shutdown, normal},  
-     {reply, From, Result}, State};
+    stop_and_reply(
+      {shutdown, normal},
+      {reply, From, Result}, State);
 handle_call({shutdown, How0}, From, _,
 	    #state{transport_cb = Transport,
 		   negotiated_version = Version,
@@ -980,7 +1189,7 @@ handle_call({shutdown, How0}, From, _,
 	    {keep_state_and_data, [{reply, From, ok}]};
 	Error ->
 	    gen_statem:reply(From, {error, Error}),
-            stop_normal(State)
+            stop(normal, State)
     end;
 handle_call({recv, _N, _Timeout}, From, _,  
 		  #state{socket_options = 
@@ -1060,43 +1269,55 @@ handle_info({ErrorTag, Socket, econnaborted}, StateName,
 		   tracker = Tracker} = State)  when StateName =/= connection ->
     alert_user(Transport, Tracker,Socket, 
 	       StartFrom, ?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), Role, Connection),
-    stop_normal(State);
+    stop(normal, State);
 
 handle_info({ErrorTag, Socket, Reason}, StateName, #state{socket = Socket,
 							  error_tag = ErrorTag} = State)  ->
     Report = io_lib:format("SSL: Socket error: ~p ~n", [Reason]),
     error_logger:error_report(Report),
     handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
-    stop_normal(State);
+    stop(normal, State);
 
 handle_info(
+  {'DOWN', MonitorRef, _, _, Reason}, _,
+  #state{
+     user_application = {MonitorRef, _Pid},
+     ssl_options = #ssl_options{erl_dist = true}}) ->
+    {stop, {shutdown, Reason}};
+handle_info(
   {'DOWN', MonitorRef, _, _, _}, _,
-  #state{user_application={MonitorRef,_Pid}} = State) ->
-    stop_normal(State);
+  #state{user_application = {MonitorRef, _Pid}}) ->
+    {stop, normal};
+handle_info(
+  {'EXIT', Pid, _Reason}, StateName,
+  #state{user_application = {_MonitorRef, Pid}} = State) ->
+    %% It seems the user application has linked to us
+    %% - ignore that and let the monitor handle this
+    {next_state, StateName, State};
 
 %%% So that terminate will be run when supervisor issues shutdown
 handle_info({'EXIT', _Sup, shutdown}, _StateName, State) ->
-    {stop, shutdown, State};
+    stop(shutdown, State);
 handle_info({'EXIT', Socket, normal}, _StateName, #state{socket = Socket} = State) ->
     %% Handle as transport close"
-    {stop, {shutdown, transport_closed}, State};
+    stop({shutdown, transport_closed}, State);
 handle_info({'EXIT', Socket, Reason}, _StateName, #state{socket = Socket} = State) ->
-    {stop, {shutdown, Reason}, State};
+    stop({shutdown, Reason}, State);
 
 handle_info(allow_renegotiate, StateName, State) ->
     {next_state, StateName, State#state{allow_renegotiate = true}};
 
 handle_info({cancel_start_or_recv, StartFrom}, StateName,
 	    #state{renegotiation = {false, first}} = State) when StateName =/= connection ->
-    {stop_and_reply, {shutdown, user_timeout},  
-     {reply, StartFrom, {error, timeout}}, State#state{timer = undefined}};
-
+    stop_and_reply(
+      {shutdown, user_timeout},
+      {reply, StartFrom, {error, timeout}},
+      State#state{timer = undefined});
 handle_info({cancel_start_or_recv, RecvFrom}, StateName, 
 	    #state{start_or_recv_from = RecvFrom} = State) when RecvFrom =/= undefined ->
     {next_state, StateName, State#state{start_or_recv_from = undefined,
 					bytes_to_read = undefined,
 					timer = undefined}, [{reply, RecvFrom, {error, timeout}}]};
-
 handle_info({cancel_start_or_recv, _RecvFrom}, StateName, State) ->
     {next_state, StateName, State#state{timer = undefined}};
 
@@ -1105,41 +1326,9 @@ handle_info(Msg, StateName, #state{socket = Socket, error_tag = Tag} = State) ->
     error_logger:info_report(Report),
     {next_state, StateName, State}.
 
-
-
-send_dist_data(StateName, State, DHandle, Acc) ->
-    case erlang:dist_ctrl_get_data(DHandle) of
-        none ->
-            erlang:dist_ctrl_get_data_notification(DHandle),
-            hibernate_after(StateName, State, lists:reverse(Acc));
-        Data ->
-            send_dist_data(
-              StateName, State, DHandle,
-              [{next_event, {call, {self(), undefined}}, {application_data, Data}}
-               |Acc])
-    end.
-
-%% Overload mitigation
-eat_msgs(Msg) ->
-    receive Msg -> eat_msgs(Msg)
-    after 0 -> ok
-    end.
-
-%% When running with erl_dist the stop reason 'normal'
-%% would be too silent and prevent cleanup
-stop_normal(State) ->
-    Reason =
-        case State of
-            #state{ssl_options = #ssl_options{erl_dist = true}} ->
-                {shutdown, normal};
-            _ ->
-                normal
-        end,
-    {stop, Reason, State}.
-
-%%--------------------------------------------------------------------
-%% gen_statem callbacks
-%%--------------------------------------------------------------------
+%%====================================================================
+%% general gen_statem callbacks
+%%====================================================================
 terminate(_, _, #state{terminated = true}) ->
     %% Happens when user closes the connection using ssl:close/1
     %% we want to guarantee that Transport:close has been called
@@ -1148,7 +1337,6 @@ terminate(_, _, #state{terminated = true}) ->
     %% returning. In both cases terminate has been run manually
     %% before run by gen_statem which will end up here
     ok;
-
 terminate({shutdown, transport_closed} = Reason, 
 	  _StateName, #state{protocol_cb = Connection,
 			     socket = Socket, transport_cb = Transport} = State) ->
@@ -1175,7 +1363,6 @@ terminate(Reason, connection, #state{negotiated_version = Version,
     {BinAlert, ConnectionStates} = terminate_alert(Reason, Version, ConnectionStates0, Connection),
     Connection:send(Transport, Socket, BinAlert),
     Connection:close(Reason, Socket, Transport, ConnectionStates, Check);
-
 terminate(Reason, _StateName, #state{transport_cb = Transport, protocol_cb = Connection,
 				     socket = Socket 
 				    } = State) ->
@@ -1209,155 +1396,6 @@ format_status(terminate, [_, StateName, State]) ->
 		       }}]}].
 
 %%--------------------------------------------------------------------
-%%% 
-%%--------------------------------------------------------------------
-write_application_data(Data0, {FromPid, _} = From,
-		       #state{socket = Socket,
-			      negotiated_version = Version,
-			      protocol_cb = Connection,
-			      transport_cb = Transport,
-			      connection_states = ConnectionStates0,
-			      socket_options = SockOpts,
-			      ssl_options = #ssl_options{renegotiate_at = RenegotiateAt}} = State) ->
-    Data = encode_packet(Data0, SockOpts),
-    
-    case time_to_renegotiate(Data, ConnectionStates0, RenegotiateAt) of
-	true ->
-	    Connection:renegotiate(State#state{renegotiation = {true, internal}}, 
-			[{next_event, {call, From}, {application_data, Data0}}]);
-	false ->
-	    {Msgs, ConnectionStates} =
-                Connection:encode_data(Data, Version, ConnectionStates0),
-            NewState = State#state{connection_states = ConnectionStates},
-	    case Connection:send(Transport, Socket, Msgs) of
-                ok when FromPid =:= self() ->
-                    hibernate_after(connection, NewState, []);
-                Error when FromPid =:= self() ->
-                    {stop, {shutdown, Error}, NewState};
-                ok ->
-                    hibernate_after(connection, NewState, [{reply, From, ok}]);
-                Result ->
-                    hibernate_after(connection, NewState, [{reply, From, Result}])
-            end
-    end.
-
-read_application_data(Data, #state{user_application = {_Mon, Pid},
-				   socket = Socket,
-				   protocol_cb = Connection,
-				   transport_cb = Transport,
-				   socket_options = SOpts,
-				   bytes_to_read = BytesToRead,
-				   start_or_recv_from = RecvFrom,
-				   timer = Timer,
-				   user_data_buffer = Buffer0,
-				   tracker = Tracker} = State0) ->
-    Buffer1 = if 
-		  Buffer0 =:= <<>> -> Data;
-		  Data =:= <<>> -> Buffer0;
-		  true -> <<Buffer0/binary, Data/binary>>
-	      end,
-    case get_data(SOpts, BytesToRead, Buffer1) of
-	{ok, ClientData, Buffer} -> % Send data
-            case State0 of
-                #state{
-                   ssl_options = #ssl_options{erl_dist = true},
-                  protocol_specific = #{d_handle := DHandle}} ->
-                    State =
-                        State0#state{
-                          user_data_buffer = Buffer,
-                          bytes_to_read = undefined},
-                    try erlang:dist_ctrl_put_data(DHandle, ClientData) of
-                        _
-                          when SOpts#socket_options.active =:= false;
-                               Buffer =:= <<>> ->
-                            %% Passive mode, wait for active once or recv
-                            %% Active and empty, get more data
-                            Connection:next_record_if_active(State);
-                        _ -> %% We have more data
-                            read_application_data(<<>>, State)
-                    catch _:Reason ->
-                            death_row(State, Reason)
-                    end;
-                _ ->
-                    SocketOpt =
-                        deliver_app_data(
-                          Transport, Socket, SOpts,
-                          ClientData, Pid, RecvFrom, Tracker, Connection),
-                    cancel_timer(Timer),
-                    State =
-                        State0#state{
-                          user_data_buffer = Buffer,
-                          start_or_recv_from = undefined,
-                          timer = undefined,
-                          bytes_to_read = undefined,
-                          socket_options = SocketOpt
-                         },
-                    if
-                        SocketOpt#socket_options.active =:= false;
-                        Buffer =:= <<>> ->
-                            %% Passive mode, wait for active once or recv
-                            %% Active and empty, get more data
-                            Connection:next_record_if_active(State);
-                        true -> %% We have more data
-                            read_application_data(<<>>, State)
-                    end
-            end;
-	{more, Buffer} -> % no reply, we need more data
-	    Connection:next_record(State0#state{user_data_buffer = Buffer});
-	{passive, Buffer} ->
-	    Connection:next_record_if_active(State0#state{user_data_buffer = Buffer});
-	{error,_Reason} -> %% Invalid packet in packet mode
-	    deliver_packet_error(Transport, Socket, SOpts, Buffer1, Pid, RecvFrom, Tracker, Connection),
-            stop_normal(State0)
-    end.
-%%--------------------------------------------------------------------
-%%% 
-%%--------------------------------------------------------------------
-handle_alert(#alert{level = ?FATAL} = Alert, StateName,
-	     #state{socket = Socket, transport_cb = Transport, 
-		    protocol_cb = Connection,
-		    ssl_options = SslOpts, start_or_recv_from = From, host = Host,
-		    port = Port, session = Session, user_application = {_Mon, Pid},
-		    role = Role, socket_options = Opts, tracker = Tracker} = State) ->
-    invalidate_session(Role, Host, Port, Session),
-    log_alert(SslOpts#ssl_options.log_alert, Role, Connection:protocol_name(), 
-              StateName, Alert#alert{role = opposite_role(Role)}),
-    alert_user(Transport, Tracker, Socket, StateName, Opts, Pid, From, Alert, Role, Connection),
-    stop_normal(State);
-
-handle_alert(#alert{level = ?WARNING, description = ?CLOSE_NOTIFY} = Alert, 
-	     StateName, State) -> 
-    handle_normal_shutdown(Alert, StateName, State),
-    {stop, {shutdown, peer_close}};
-
-handle_alert(#alert{level = ?WARNING, description = ?NO_RENEGOTIATION} = Alert, StateName, 
-	     #state{role = Role, ssl_options = SslOpts, protocol_cb = Connection, renegotiation = {true, internal}} = State) ->
-    log_alert(SslOpts#ssl_options.log_alert, Role, 
-              Connection:protocol_name(), StateName, Alert#alert{role = opposite_role(Role)}),
-    handle_normal_shutdown(Alert, StateName, State),
-    {stop, {shutdown, peer_close}};
-
-handle_alert(#alert{level = ?WARNING, description = ?NO_RENEGOTIATION} = Alert, StateName, 
-	     #state{role = Role,
-                    ssl_options = SslOpts, renegotiation = {true, From},
-		    protocol_cb = Connection} = State0) ->
-    log_alert(SslOpts#ssl_options.log_alert,  Role,
-              Connection:protocol_name(), StateName, Alert#alert{role = opposite_role(Role)}),
-    gen_statem:reply(From, {error, renegotiation_rejected}),
-    {Record, State1} = Connection:next_record(State0),
-    %% Go back to connection!
-    State = Connection:reinit_handshake_data(State1#state{renegotiation = undefined}),
-    Connection:next_event(connection, Record, State);
-
-%% Gracefully log and ignore all other warning alerts
-handle_alert(#alert{level = ?WARNING} = Alert, StateName,
-	     #state{ssl_options = SslOpts, protocol_cb = Connection, role = Role} = State0) ->
-    log_alert(SslOpts#ssl_options.log_alert,  Role,
-              Connection:protocol_name(), StateName, Alert#alert{role = opposite_role(Role)}),
-    {Record, State} = Connection:next_record(State0),
-    Connection:next_event(StateName, Record, State).
-
-%%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------
 connection_info(#state{sni_hostname = SNIHostname, 
@@ -1367,9 +1405,9 @@ connection_info(#state{sni_hostname = SNIHostname,
 		       negotiated_version =  {_,_} = Version, 
 		       ssl_options = Opts}) ->
     RecordCB = record_cb(Connection),
-    CipherSuiteDef = ssl_cipher:erl_suite_definition(CipherSuite),
-    IsNamedCurveSuite = lists:member(element(1,CipherSuiteDef),
-			      [ecdh_ecdsa, ecdhe_ecdsa, ecdh_anon]),
+    CipherSuiteDef = #{key_exchange := KexAlg} = ssl_cipher:suite_definition(CipherSuite),
+    IsNamedCurveSuite = lists:member(KexAlg,
+                                     [ecdh_ecdsa, ecdhe_ecdsa, ecdh_anon]),
     CurveInfo = case ECCCurve of
 		    {namedCurve, Curve} when IsNamedCurveSuite ->
 			[{ecc, {named_curve, pubkey_cert_records:namedCurves(Curve)}}];
@@ -1378,7 +1416,7 @@ connection_info(#state{sni_hostname = SNIHostname,
 		end,
     [{protocol, RecordCB:protocol_version(Version)},
      {session_id, SessionId},
-     {cipher_suite, CipherSuiteDef},
+     {cipher_suite, ssl_cipher:erl_suite_definition(CipherSuiteDef)},
      {sni_hostname, SNIHostname} | CurveInfo] ++ ssl_options_list(Opts).
 
 security_info(#state{connection_states = ConnectionStates}) ->
@@ -1446,7 +1484,7 @@ resumed_server_hello(#state{session = Session,
 
 server_hello(ServerHello, State0, Connection) ->
     CipherSuite = ServerHello#server_hello.cipher_suite,
-    {KeyAlgorithm, _, _, _} = ssl_cipher:suite_definition(CipherSuite),
+    #{key_exchange := KeyAlgorithm}  = ssl_cipher:suite_definition(CipherSuite),
     State = Connection:queue_handshake(ServerHello, State0),
     State#state{key_algorithm = KeyAlgorithm}.
 
@@ -1460,8 +1498,8 @@ handle_peer_cert(Role, PeerCert, PublicKeyInfo,
     State1 = State0#state{session =
 			 Session#session{peer_certificate = PeerCert},
 			 public_key_info = PublicKeyInfo},
-    {KeyAlg,_,_,_} = ssl_cipher:suite_definition(CipherSuite),
-    State2 = handle_peer_cert_key(Role, PeerCert, PublicKeyInfo, KeyAlg, State1),
+    #{key_exchange := KeyAlgorithm} = ssl_cipher:suite_definition(CipherSuite),
+    State2 = handle_peer_cert_key(Role, PeerCert, PublicKeyInfo, KeyAlgorithm, State1),
 
     {Record, State} = Connection:next_record(State2),
     Connection:next_event(certify, Record, State).
@@ -1474,7 +1512,6 @@ handle_peer_cert_key(client, _,
     ECDHKey = public_key:generate_key(PublicKeyParams),
     PremasterSecret = ssl_handshake:premaster_secret(PublicKey, ECDHKey),
     master_secret(PremasterSecret, State#state{diffie_hellman_keys = ECDHKey});
-
 %% We do currently not support cipher suites that use fixed DH.
 %% If we want to implement that the following clause can be used
 %% to extract DH parameters form cert.
@@ -1494,7 +1531,6 @@ certify_client(#state{client_certificate_requested = true, role = client,
 	       = State, Connection) ->
     Certificate = ssl_handshake:certificate(OwnCert, CertDbHandle, CertDbRef, client),
     Connection:queue_handshake(Certificate, State);
-
 certify_client(#state{client_certificate_requested = false} = State, _) ->
     State.
 
@@ -1544,10 +1580,26 @@ server_certify_and_key_exchange(State0, Connection) ->
     request_client_cert(State2, Connection).
 
 certify_client_key_exchange(#encrypted_premaster_secret{premaster_secret= EncPMS},
-			    #state{private_key = Key} = State, Connection) ->
-    PremasterSecret = ssl_handshake:premaster_secret(EncPMS, Key),
+			    #state{private_key = Key, client_hello_version = {Major, Minor} = Version} = State, Connection) ->
+    FakeSecret = make_premaster_secret(Version, rsa),
+    %% Countermeasure for Bleichenbacher attack always provide some kind of premaster secret
+    %% and fail handshake later.RFC 5246 section 7.4.7.1.
+    PremasterSecret =
+        try ssl_handshake:premaster_secret(EncPMS, Key) of
+            Secret when erlang:byte_size(Secret) == ?NUM_OF_PREMASTERSECRET_BYTES ->
+                case Secret of
+                    <<?BYTE(Major), ?BYTE(Minor), Rest/binary>> -> %% Correct
+                        <<?BYTE(Major), ?BYTE(Minor), Rest/binary>>;
+                    <<?BYTE(_), ?BYTE(_), Rest/binary>> -> %% Version mismatch
+                        <<?BYTE(Major), ?BYTE(Minor), Rest/binary>>
+                end;
+            _ -> %% erlang:byte_size(Secret) =/= ?NUM_OF_PREMASTERSECRET_BYTES
+                FakeSecret
+        catch 
+            #alert{description = ?DECRYPT_ERROR} ->
+                FakeSecret
+        end,    
     calculate_master_secret(PremasterSecret, State, Connection, certify, cipher);
-
 certify_client_key_exchange(#client_diffie_hellman_public{dh_public = ClientPublicDhKey},
 			    #state{diffie_hellman_params = #'DHParameter'{} = Params,
 				   diffie_hellman_keys = {_, ServerDhPrivateKey}} = State,
@@ -1559,14 +1611,12 @@ certify_client_key_exchange(#client_ec_diffie_hellman_public{dh_public = ClientP
 			    #state{diffie_hellman_keys = ECDHKey} = State, Connection) ->
     PremasterSecret = ssl_handshake:premaster_secret(#'ECPoint'{point = ClientPublicEcDhPoint}, ECDHKey),
     calculate_master_secret(PremasterSecret, State, Connection, certify, cipher);
-
 certify_client_key_exchange(#client_psk_identity{} = ClientKey,
 			    #state{ssl_options = 
 				       #ssl_options{user_lookup_fun = PSKLookup}} = State0,
 			    Connection) ->
     PremasterSecret = ssl_handshake:premaster_secret(ClientKey, PSKLookup),
     calculate_master_secret(PremasterSecret, State0, Connection, certify, cipher);
-
 certify_client_key_exchange(#client_dhe_psk_identity{} = ClientKey,
 			    #state{diffie_hellman_params = #'DHParameter'{} = Params,
 				   diffie_hellman_keys = {_, ServerDhPrivateKey},
@@ -1576,7 +1626,6 @@ certify_client_key_exchange(#client_dhe_psk_identity{} = ClientKey,
     PremasterSecret = 
 	ssl_handshake:premaster_secret(ClientKey, ServerDhPrivateKey, Params, PSKLookup),
     calculate_master_secret(PremasterSecret, State0, Connection, certify, cipher);
-
 certify_client_key_exchange(#client_ecdhe_psk_identity{} = ClientKey,
 			    #state{diffie_hellman_keys = ServerEcDhPrivateKey,
 				   ssl_options =
@@ -1585,7 +1634,6 @@ certify_client_key_exchange(#client_ecdhe_psk_identity{} = ClientKey,
     PremasterSecret =
 	ssl_handshake:premaster_secret(ClientKey, ServerEcDhPrivateKey, PSKLookup),
     calculate_master_secret(PremasterSecret, State, Connection, certify, cipher);
-
 certify_client_key_exchange(#client_rsa_psk_identity{} = ClientKey,
 			    #state{private_key = Key,
 				   ssl_options = 
@@ -1593,7 +1641,6 @@ certify_client_key_exchange(#client_rsa_psk_identity{} = ClientKey,
 			    Connection) ->
     PremasterSecret = ssl_handshake:premaster_secret(ClientKey, Key, PSKLookup),
     calculate_master_secret(PremasterSecret, State0, Connection, certify, cipher);
-
 certify_client_key_exchange(#client_srp_public{} = ClientKey,
 			    #state{srp_params = Params,
 				   srp_keys = Key
@@ -1608,7 +1655,6 @@ certify_server(#state{key_algorithm = Algo} = State, _) when Algo == dh_anon;
 							     Algo == ecdhe_psk; 
 							     Algo == srp_anon  ->
     State;
-
 certify_server(#state{cert_db = CertDbHandle,
 		      cert_db_ref = CertDbRef,
 		      session = #session{own_certificate = OwnCert}} = State, Connection) ->
@@ -1642,7 +1688,6 @@ key_exchange(#state{role = server, key_algorithm = Algo,
 					       PrivateKey}),
     State = Connection:queue_handshake(Msg, State0),
     State#state{diffie_hellman_keys = DHKeys};
-
 key_exchange(#state{role = server, private_key = Key, key_algorithm = Algo} = State, _)
   when Algo == ecdh_ecdsa; Algo == ecdh_rsa ->
     State#state{diffie_hellman_keys = Key};
@@ -1668,7 +1713,6 @@ key_exchange(#state{role = server, key_algorithm = Algo,
 				       PrivateKey}),
     State = Connection:queue_handshake(Msg, State0),
     State#state{diffie_hellman_keys = ECDHKeys};
-
 key_exchange(#state{role = server, key_algorithm = psk,
 		    ssl_options = #ssl_options{psk_identity = undefined}} = State, _) ->
     State;
@@ -1689,7 +1733,6 @@ key_exchange(#state{role = server, key_algorithm = psk,
 				      ServerRandom,
 						       PrivateKey}),
     Connection:queue_handshake(Msg, State0);
-
 key_exchange(#state{role = server, key_algorithm = dhe_psk,
 		    ssl_options = #ssl_options{psk_identity = PskIdentityHint},
 		    hashsign_algorithm = HashSignAlgo,
@@ -1711,7 +1754,6 @@ key_exchange(#state{role = server, key_algorithm = dhe_psk,
 				       PrivateKey}),
     State = Connection:queue_handshake(Msg, State0),
     State#state{diffie_hellman_keys = DHKeys};
-
 key_exchange(#state{role = server, key_algorithm = ecdhe_psk,
 		    ssl_options = #ssl_options{psk_identity = PskIdentityHint},
 		    hashsign_algorithm = HashSignAlgo,
@@ -1733,7 +1775,6 @@ key_exchange(#state{role = server, key_algorithm = ecdhe_psk,
 				       PrivateKey}),
     State = Connection:queue_handshake(Msg, State0),
     State#state{diffie_hellman_keys = ECDHKeys};
-
 key_exchange(#state{role = server, key_algorithm = rsa_psk,
 		    ssl_options = #ssl_options{psk_identity = undefined}} = State, _) ->
     State;
@@ -1754,7 +1795,6 @@ key_exchange(#state{role = server, key_algorithm = rsa_psk,
 				       ServerRandom,
 				       PrivateKey}),
     Connection:queue_handshake(Msg, State0);
-
 key_exchange(#state{role = server, key_algorithm = Algo,
 		    ssl_options = #ssl_options{user_lookup_fun = LookupFun},
 		    hashsign_algorithm = HashSignAlgo,
@@ -1785,7 +1825,6 @@ key_exchange(#state{role = server, key_algorithm = Algo,
     State = Connection:queue_handshake(Msg, State0),
     State#state{srp_params = SrpParams,
 		srp_keys = Keys};
-
 key_exchange(#state{role = client,
 		    key_algorithm = rsa,
 		    public_key_info = PublicKeyInfo,
@@ -1793,7 +1832,6 @@ key_exchange(#state{role = client,
 		    premaster_secret = PremasterSecret} = State0, Connection) ->
     Msg = rsa_key_exchange(ssl:tls_version(Version), PremasterSecret, PublicKeyInfo),
     Connection:queue_handshake(Msg, State0);
-
 key_exchange(#state{role = client,
 		    key_algorithm = Algorithm,
 		    negotiated_version = Version,
@@ -1814,7 +1852,6 @@ key_exchange(#state{role = client,
        Algorithm == ecdh_anon ->
     Msg = ssl_handshake:key_exchange(client, ssl:tls_version(Version), {ecdh, Keys}),
     Connection:queue_handshake(Msg, State0);
-
 key_exchange(#state{role = client,
 		    ssl_options = SslOpts,
 		    key_algorithm = psk,
@@ -1822,7 +1859,6 @@ key_exchange(#state{role = client,
     Msg =  ssl_handshake:key_exchange(client, ssl:tls_version(Version), 
 				      {psk, SslOpts#ssl_options.psk_identity}),
     Connection:queue_handshake(Msg, State0);
-
 key_exchange(#state{role = client,
 		    ssl_options = SslOpts,
 		    key_algorithm = dhe_psk,
@@ -1853,7 +1889,6 @@ key_exchange(#state{role = client,
     Msg = rsa_psk_key_exchange(ssl:tls_version(Version), SslOpts#ssl_options.psk_identity,
 			       PremasterSecret, PublicKeyInfo),
     Connection:queue_handshake(Msg, State0);
-
 key_exchange(#state{role = client,
 		    key_algorithm = Algorithm,
 		    negotiated_version = Version,
@@ -2242,10 +2277,7 @@ set_socket_opts(_,_, _, [{active, _} = Opt| _], SockOpts, _) ->
 set_socket_opts(ConnectionCb, Transport, Socket, [Opt | Opts], SockOpts, Other) ->
     set_socket_opts(ConnectionCb, Transport, Socket, Opts, SockOpts, [Opt | Other]).
 
-start_or_recv_cancel_timer(infinity, _RecvFrom) ->
-    undefined;
-start_or_recv_cancel_timer(Timeout, RecvFrom) ->
-    erlang:send_after(Timeout, self(), {cancel_start_or_recv, RecvFrom}).
+
 
 hibernate_after(connection = StateName, 
 		#state{ssl_options=#ssl_options{hibernate_after = HibernateAfter}} = State,
@@ -2336,6 +2368,11 @@ register_session(server, _, Port, #session{is_resumable = new} = Session0) ->
 register_session(_, _, _, Session) ->
     Session. %% Already registered
 
+host_id(client, _Host, #ssl_options{server_name_indication = Hostname}) when is_list(Hostname) ->
+    Hostname;
+host_id(_, Host, _) ->
+    Host.
+
 handle_new_session(NewId, CipherSuite, Compression, 
 		   #state{session = Session0,
 			  protocol_cb = Connection} = State0) ->
@@ -2419,8 +2456,8 @@ handle_active_option(_, connection = StateName0, To, Reply, #state{protocol_cb =
 	    hibernate_after(StateName, State, [{reply, To, Reply}]);
 	{next_state, StateName, State, Actions} -> 
 	    hibernate_after(StateName, State, [{reply, To, Reply} | Actions]);
-	{stop, Reason, State} ->
-	    {stop, Reason, State}
+	{stop, _, _} = Stop ->
+	    Stop
     end;
 handle_active_option(_, StateName, To, Reply, #state{user_data_buffer = <<>>} = State) ->
     %% Active once already set 
@@ -2429,8 +2466,8 @@ handle_active_option(_, StateName, To, Reply, #state{user_data_buffer = <<>>} =
 %% user_data_buffer =/= <<>>
 handle_active_option(_, StateName0, To, Reply, #state{protocol_cb = Connection} = State0) -> 
     case read_application_data(<<>>, State0) of
-	{stop, Reason, State} ->
-	    {stop, Reason, State};
+	{stop, _, _} = Stop ->
+	    Stop;
 	{Record, State1} ->
 	    %% Note: Renogotiation may cause StateName0 =/= StateName
 	    case Connection:next_event(StateName0, Record, State1) of
@@ -2588,7 +2625,8 @@ send_or_reply(_, Pid, _From, Data) ->
     send_user(Pid, Data).
 
 send_user(Pid, Msg) ->
-    Pid ! Msg.
+    Pid ! Msg,
+    ok.
 
 alert_user(Transport, Tracker, Socket, connection, Opts, Pid, From, Alert, Role, Connection) ->
     alert_user(Transport, Tracker, Socket, Opts#socket_options.active, Pid, From, Alert, Role, Connection);
@@ -2625,45 +2663,6 @@ log_alert(true, Role, ProtocolName, StateName, Alert) ->
 log_alert(false, _, _, _, _) ->
     ok.
 
-handle_own_alert(Alert, Version, StateName, 
-		 #state{role = Role,
-                        transport_cb = Transport,
-                        socket = Socket,
-                        protocol_cb = Connection,
-                        connection_states = ConnectionStates,
-                        ssl_options = SslOpts} = State) ->
-    try %% Try to tell the other side
-	{BinMsg, _} =
-	Connection:encode_alert(Alert, Version, ConnectionStates),
-	Connection:send(Transport, Socket, BinMsg)
-    catch _:_ ->  %% Can crash if we are in a uninitialized state
-	    ignore
-    end,
-    try %% Try to tell the local user
-	log_alert(SslOpts#ssl_options.log_alert, Role, Connection:protocol_name(), StateName, Alert#alert{role = Role}),
-	handle_normal_shutdown(Alert,StateName, State)
-    catch _:_ ->
-	    ok
-    end,
-    {stop, {shutdown, own_alert}}.
-
-handle_normal_shutdown(Alert, _, #state{socket = Socket,
-					transport_cb = Transport,
-					protocol_cb = Connection,
-					start_or_recv_from = StartFrom,
-					tracker = Tracker,
-					role = Role, renegotiation = {false, first}}) ->
-    alert_user(Transport, Tracker,Socket, StartFrom, Alert, Role, Connection);
-
-handle_normal_shutdown(Alert, StateName, #state{socket = Socket,
-						socket_options = Opts,
-						transport_cb = Transport,
-						protocol_cb = Connection,
-						user_application = {_Mon, Pid},
-						tracker = Tracker,
-						start_or_recv_from = RecvFrom, role = Role}) ->
-    alert_user(Transport, Tracker, Socket, StateName, Opts, Pid, RecvFrom, Alert, Role, Connection).
-
 invalidate_session(client, Host, Port, Session) ->
     ssl_manager:invalidate_session(Host, Port, Session);
 invalidate_session(server, _, Port, Session) ->
@@ -2720,3 +2719,42 @@ new_emulated([], EmOpts) ->
     EmOpts;
 new_emulated(NewEmOpts, _) ->
     NewEmOpts.
+%%---------------Erlang distribution --------------------------------------
+
+send_dist_data(StateName, State, DHandle, Acc) ->
+    case erlang:dist_ctrl_get_data(DHandle) of
+        none ->
+            erlang:dist_ctrl_get_data_notification(DHandle),
+            hibernate_after(StateName, State, lists:reverse(Acc));
+        Data ->
+            send_dist_data(
+              StateName, State, DHandle,
+              [{next_event, {call, {self(), undefined}}, {application_data, Data}}
+               |Acc])
+    end.
+
+%% Overload mitigation
+eat_msgs(Msg) ->
+    receive Msg -> eat_msgs(Msg)
+    after 0 -> ok
+    end.
+
+%% When acting as distribution controller map the exit reason
+%% to follow the documented nodedown_reason for net_kernel
+stop(Reason, State) ->
+    {stop, erl_dist_stop_reason(Reason, State), State}.
+
+stop_and_reply(Reason, Replies, State) ->
+    {stop_and_reply, erl_dist_stop_reason(Reason, State), Replies, State}.
+
+erl_dist_stop_reason(
+  Reason, #state{ssl_options = #ssl_options{erl_dist = true}}) ->
+    case Reason of
+        normal ->
+            %% We can not exit with normal since that will not bring
+            %% down the rest of the distribution processes
+            {shutdown, normal};
+        _ -> Reason
+    end;
+erl_dist_stop_reason(Reason, _State) ->
+    Reason.
diff --git a/lib/ssl/src/ssl_connection.hrl b/lib/ssl/src/ssl_connection.hrl
index 3e26f67de1..f9d2149170 100644
--- a/lib/ssl/src/ssl_connection.hrl
+++ b/lib/ssl/src/ssl_connection.hrl
@@ -57,6 +57,7 @@
 	  session_cache_cb      :: atom(),
 	  crl_db                :: term(), 
           negotiated_version    :: ssl_record:ssl_version() | 'undefined',
+          client_hello_version  :: ssl_record:ssl_version() | 'undefined',
           client_certificate_requested = false :: boolean(),
 	  key_algorithm         :: ssl_cipher:key_algo(),
 	  hashsign_algorithm = {undefined, undefined},
diff --git a/lib/ssl/src/ssl_crl_cache.erl b/lib/ssl/src/ssl_crl_cache.erl
index 8817b0c884..66f46da75f 100644
--- a/lib/ssl/src/ssl_crl_cache.erl
+++ b/lib/ssl/src/ssl_crl_cache.erl
@@ -92,8 +92,8 @@ delete({der, CRLs}) ->
     ssl_manager:delete_crls({?NO_DIST_POINT, CRLs});
 
 delete(URI) ->
-    case http_uri:parse(URI) of
-	{ok, {http, _, _ , _, Path,_}} -> 
+    case uri_string:normalize(URI, [return_map]) of
+	#{scheme := "http", path := Path} ->
 	    ssl_manager:delete_crls(string:trim(Path, leading, "/"));
 	_ ->
 	    {error, {only_http_distribution_points_supported, URI}}
@@ -103,8 +103,8 @@ delete(URI) ->
 %%% Internal functions
 %%--------------------------------------------------------------------
 do_insert(URI, CRLs) ->
-    case http_uri:parse(URI) of
-	{ok, {http, _, _ , _, Path,_}} -> 
+    case uri_string:normalize(URI, [return_map]) of
+	#{scheme := "http", path := Path} ->
 	    ssl_manager:insert_crls(string:trim(Path, leading, "/"), CRLs);
 	_ ->
 	    {error, {only_http_distribution_points_supported, URI}}
@@ -161,7 +161,7 @@ http_get(URL, Rest, CRLDbInfo, Timeout) ->
 cache_lookup(_, undefined) ->
     [];
 cache_lookup(URL, {{Cache, _}, _}) ->
-    {ok, {_, _, _ , _, Path,_}} = http_uri:parse(URL), 
+    #{path :=  Path} = uri_string:normalize(URL, [return_map]),
     case ssl_pkix_db:lookup(string:trim(Path, leading, "/"), Cache) of
 	undefined ->
 	    [];
diff --git a/lib/ssl/src/ssl_dist_sup.erl b/lib/ssl/src/ssl_dist_sup.erl
index c241a9bced..bea67935d8 100644
--- a/lib/ssl/src/ssl_dist_sup.erl
+++ b/lib/ssl/src/ssl_dist_sup.erl
@@ -30,6 +30,9 @@
 %% Supervisor callback
 -export([init/1]).
 
+%% Debug
+-export([consult/1]).
+
 %%%=========================================================================
 %%%  API
 %%%=========================================================================
@@ -37,7 +40,18 @@
 -spec start_link() -> {ok, pid()} | ignore | {error, term()}.
 			
 start_link() ->
-    supervisor:start_link({local, ?MODULE}, ?MODULE, []).
+    case init:get_argument(ssl_dist_optfile) of
+        {ok, [File]} ->
+            DistOpts = consult(File),
+            TabOpts = [set, protected, named_table],
+            Tab = ets:new(ssl_dist_opts, TabOpts),
+            true = ets:insert(Tab, DistOpts),
+            supervisor:start_link({local, ?MODULE}, ?MODULE, []);
+        {ok, BadArg} ->
+            error({bad_ssl_dist_optfile, BadArg});
+        error ->
+            supervisor:start_link({local, ?MODULE}, ?MODULE, [])
+    end.
 
 %%%=========================================================================
 %%%  Supervisor callback
@@ -68,3 +82,52 @@ ssl_connection_sup() ->
     Modules = [ssl_connection_sup],
     Type = supervisor,
     {Name, StartFunc, Restart, Shutdown, Type, Modules}.
+
+consult(File) ->
+    case erl_prim_loader:get_file(File) of
+        {ok, Binary, _FullName} ->
+            Encoding =
+                case epp:read_encoding_from_binary(Binary) of
+                    none -> latin1;
+                    Enc -> Enc
+                end,
+            case unicode:characters_to_list(Binary, Encoding) of
+                {error, _String, Rest} ->
+                    error(
+                      {bad_ssl_dist_optfile, {encoding_error, Rest}});
+                {incomplete, _String, Rest} ->
+                    error(
+                      {bad_ssl_dist_optfile, {encoding_incomplete, Rest}});
+                String when is_list(String) ->
+                    consult_string(String)
+            end;
+        error ->
+            error({bad_ssl_dist_optfile, File})
+    end.
+
+consult_string(String) ->
+    case erl_scan:string(String) of
+        {error, Info, Location} ->
+            error({bad_ssl_dist_optfile, {scan_error, Info, Location}});
+        {ok, Tokens, _EndLocation} ->
+            consult_tokens(Tokens)
+    end.
+
+consult_tokens(Tokens) ->
+    case erl_parse:parse_exprs(Tokens) of
+        {error, Info} ->
+            error({bad_ssl_dist_optfile, {parse_error, Info}});
+        {ok, [Expr]} ->
+            consult_expr(Expr);
+        {ok, Other} ->
+            error({bad_ssl_dist_optfile, {parse_error, Other}})
+    end.
+
+consult_expr(Expr) ->
+    {value, Value, Bs} = erl_eval:expr(Expr, erl_eval:new_bindings()),
+    case erl_eval:bindings(Bs) of
+        [] ->
+            Value;
+        Other ->
+            error({bad_ssl_dist_optfile, {bindings, Other}})
+    end.
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index fc4181a760..e1f813ea95 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -44,46 +44,44 @@
 			 #client_key_exchange{} | #finished{} | #certificate_verify{} |
 			 #hello_request{} | #next_protocol{}.
 
-%% Handshake messages
+%% Create handshake messages
 -export([hello_request/0, server_hello/4, server_hello_done/0,
-	 certificate/4, certificate_request/5, key_exchange/3,
+	 certificate/4,  client_certificate_verify/6,  certificate_request/5, key_exchange/3,
 	 finished/5,  next_protocol/1]).
 
 %% Handle handshake messages
--export([certify/6, client_certificate_verify/6, certificate_verify/6, verify_signature/5,
+-export([certify/7, certificate_verify/6, verify_signature/5,
 	 master_secret/4, server_key_exchange_hash/2, verify_connection/6,
-	 init_handshake_history/0, update_handshake_history/3, verify_server_key/5
+	 init_handshake_history/0, update_handshake_history/2, verify_server_key/5,
+         select_version/3
 	]).
 
-%% Encode/Decode
+%% Encode
 -export([encode_handshake/2, encode_hello_extensions/1,
-	 encode_client_protocol_negotiation/2, encode_protocols_advertised_on_server/1,
-	 decode_handshake/3, decode_hello_extensions/1,
+	 encode_client_protocol_negotiation/2, encode_protocols_advertised_on_server/1]).
+%% Decode
+-export([decode_handshake/3, decode_hello_extensions/1,
 	 decode_server_key/3, decode_client_key/3,
 	 decode_suites/2
 	]).
 
 %% Cipher suites handling
--export([available_suites/2, available_signature_algs/2, cipher_suites/2,
-	 select_session/11, supported_ecc/1, available_signature_algs/4]).
+-export([available_suites/2, available_signature_algs/2,  available_signature_algs/4, 
+         cipher_suites/3, prf/6, select_session/11, supported_ecc/1,
+         premaster_secret/2, premaster_secret/3, premaster_secret/4]).
 
 %% Extensions handling
 -export([client_hello_extensions/5,
 	 handle_client_hello_extensions/9, %% Returns server hello extensions
-	 handle_server_hello_extensions/9, select_curve/2, select_curve/3
+	 handle_server_hello_extensions/9, select_curve/2, select_curve/3,
+         select_hashsign/4, select_hashsign/5,
+	 select_hashsign_algs/3
 	]).
 
-%% MISC
--export([select_version/3, prf/6,  select_hashsign/4, select_hashsign/5,
-	 select_hashsign_algs/3,
-	 premaster_secret/2, premaster_secret/3, premaster_secret/4]).
-
 %%====================================================================
-%% Internal application API
+%% Create handshake messages 
 %%====================================================================
 
-%% ---------- Create handshake messages  ----------
-
 %%--------------------------------------------------------------------
 -spec hello_request() -> #hello_request{}.
 %%
@@ -119,31 +117,6 @@ server_hello(SessionId, Version, ConnectionStates, Extensions) ->
 server_hello_done() ->
     #server_hello_done{}.
 
-client_hello_extensions(Version, CipherSuites, 
-			#ssl_options{signature_algs = SupportedHashSigns,
-				     eccs = SupportedECCs} = SslOpts, ConnectionStates, Renegotiation) ->
-    {EcPointFormats, EllipticCurves} =
-	case advertises_ec_ciphers(lists:map(fun ssl_cipher:suite_definition/1, CipherSuites)) of
-	    true ->
-		client_ecc_extensions(SupportedECCs);
-	    false ->
-		{undefined, undefined}
-	end,
-    SRP = srp_user(SslOpts),
-
-    #hello_extensions{
-       renegotiation_info = renegotiation_info(tls_record, client,
-					       ConnectionStates, Renegotiation),
-       srp = SRP,
-       signature_algs = available_signature_algs(SupportedHashSigns, Version),
-       ec_point_formats = EcPointFormats,
-       elliptic_curves = EllipticCurves,
-       alpn = encode_alpn(SslOpts#ssl_options.alpn_advertised_protocols, Renegotiation),
-       next_protocol_negotiation =
-	   encode_client_protocol_negotiation(SslOpts#ssl_options.next_protocol_selector,
-					      Renegotiation),
-       sni = sni(SslOpts#ssl_options.server_name_indication)}.
-
 %%--------------------------------------------------------------------
 -spec certificate(der_cert(), db_handle(), certdb_ref(), client | server) -> #certificate{} | #alert{}.
 %%
@@ -171,14 +144,6 @@ certificate(OwnCert, CertDbHandle, CertDbRef, server) ->
     end.
 
 %%--------------------------------------------------------------------
--spec next_protocol(binary()) -> #next_protocol{}.
-%%
-%% Description: Creates a next protocol message
-%%-------------------------------------------------------------------
-next_protocol(SelectedProtocol) ->
-  #next_protocol{selected_protocol = SelectedProtocol}.
-
-%%--------------------------------------------------------------------
 -spec client_certificate_verify(undefined | der_cert(), binary(),
 				ssl_record:ssl_version(), term(), public_key:private_key(),
 				ssl_handshake_history()) ->
@@ -224,12 +189,18 @@ certificate_request(CipherSuite, CertDbHandle, CertDbRef, HashSigns, Version) ->
 		   {dh, binary()} |
 		   {dh, {binary(), binary()}, #'DHParameter'{}, {HashAlgo::atom(), SignAlgo::atom()},
 		   binary(), binary(), public_key:private_key()} |
+		   {ecdh, _, _, _, _, _} |
 		   {ecdh, #'ECPrivateKey'{}} |
+		   {psk, _, _, _, _, _} |
 		   {psk, binary()} |
+		   {dhe_psk, _, _, _, _, _, _, _} |
 		   {dhe_psk, binary(), binary()} |
+		   {ecdhe_psk, _, _, _, _, _, _} |
 		   {ecdhe_psk, binary(), #'ECPrivateKey'{}} |
 		   {srp, {binary(), binary()}, #srp_user{}, {HashAlgo::atom(), SignAlgo::atom()},
-		   binary(), binary(), public_key:private_key()}) ->
+                    binary(), binary(), public_key:private_key()} |
+		   {srp, _} |
+                   {psk_premaster_secret, _, _, _}) ->
     #client_key_exchange{} | #server_key_exchange{}.
 
 %%
@@ -346,22 +317,51 @@ key_exchange(server, Version, {srp, {PublicKey, _},
 finished(Version, Role, PrfAlgo, MasterSecret, {Handshake, _}) -> % use the current handshake
     #finished{verify_data =
 	      calc_finished(Version, Role, PrfAlgo, MasterSecret, Handshake)}.
+%%--------------------------------------------------------------------
+-spec next_protocol(binary()) -> #next_protocol{}.
+%%
+%% Description: Creates a next protocol message
+%%-------------------------------------------------------------------
+next_protocol(SelectedProtocol) ->
+  #next_protocol{selected_protocol = SelectedProtocol}.
 
-%% ---------- Handle handshake messages  ----------
+%%====================================================================
+%% Handle handshake messages 
+%%====================================================================
+%%--------------------------------------------------------------------
+-spec certify(#certificate{}, db_handle(), certdb_ref(), #ssl_options{}, term(),
+	      client | server, inet:hostname() | inet:ip_address()) ->  {der_cert(), public_key_info()} | #alert{}.
+%%
+%% Description: Handles a certificate handshake message
+%%--------------------------------------------------------------------
+certify(#certificate{asn1_certificates = ASN1Certs}, CertDbHandle, CertDbRef,
+        Opts, CRLDbHandle, Role, Host) ->    
 
-verify_server_key(#server_key_params{params_bin = EncParams,
-				     signature = Signature},
-		  HashSign = {HashAlgo, _},
-		  ConnectionStates, Version, PubKeyInfo) ->
-    #{security_parameters := SecParams} =
-	ssl_record:pending_connection_state(ConnectionStates, read),
-    #security_parameters{client_random = ClientRandom,
-			 server_random = ServerRandom} = SecParams,
-    Hash = server_key_exchange_hash(HashAlgo,
-				    <<ClientRandom/binary,
-				      ServerRandom/binary,
-				      EncParams/binary>>),
-    verify_signature(Version, Hash, HashSign, Signature, PubKeyInfo).
+    ServerName = server_name(Opts#ssl_options.server_name_indication, Host, Role),
+    [PeerCert | _] = ASN1Certs,       
+    try
+	{TrustedCert, CertPath}  =
+	    ssl_certificate:trusted_cert_and_path(ASN1Certs, CertDbHandle, CertDbRef,  
+                                                  Opts#ssl_options.partial_chain),
+        ValidationFunAndState = validation_fun_and_state(Opts#ssl_options.verify_fun, Role, 
+                                                         CertDbHandle, CertDbRef, ServerName,
+                                                         Opts#ssl_options.crl_check, CRLDbHandle, CertPath),
+	case public_key:pkix_path_validation(TrustedCert,
+					     CertPath,
+					     [{max_path_length,  Opts#ssl_options.depth},
+					      {verify_fun, ValidationFunAndState}]) of
+	    {ok, {PublicKeyInfo,_}} ->
+		{PeerCert, PublicKeyInfo};
+	    {error, Reason} ->
+		path_validation_alert(Reason)
+	end
+    catch
+	error:{badmatch,{asn1, Asn1Reason}} ->
+	    %% ASN-1 decode of certificate somehow failed
+            ?ALERT_REC(?FATAL, ?CERTIFICATE_UNKNOWN, {failed_to_decode_certificate, Asn1Reason});
+        error:OtherReason ->
+            ?ALERT_REC(?FATAL, ?INTERNAL_ERROR, {unexpected_error, OtherReason})
+    end.
 
 %%--------------------------------------------------------------------
 -spec certificate_verify(binary(), public_key_info(), ssl_record:ssl_version(), term(),
@@ -404,43 +404,55 @@ verify_signature(_, Hash, {HashAlgo, _SignAlg}, Signature,
 		 {?'id-ecPublicKey', PublicKey, PublicKeyParams}) ->
     public_key:verify({digest, Hash}, HashAlgo, Signature, {PublicKey, PublicKeyParams}).
 
-
 %%--------------------------------------------------------------------
--spec certify(#certificate{}, db_handle(), certdb_ref(), #ssl_options{}, term(),
-	      client | server) ->  {der_cert(), public_key_info()} | #alert{}.
+-spec master_secret(ssl_record:ssl_version(), #session{} | binary(), ssl_record:connection_states(),
+		   client | server) -> {binary(), ssl_record:connection_states()} | #alert{}.
 %%
-%% Description: Handles a certificate handshake message
-%%--------------------------------------------------------------------
-certify(#certificate{asn1_certificates = ASN1Certs}, CertDbHandle, CertDbRef,
-        Opts, CRLDbHandle, Role) ->    
+%% Description: Sets or calculates the master secret and calculate keys,
+%% updating the pending connection states. The Mastersecret and the update
+%% connection states are returned or an alert if the calculation fails.
+%%-------------------------------------------------------------------
+master_secret(Version, #session{master_secret = Mastersecret},
+	      ConnectionStates, Role) ->
+    #{security_parameters := SecParams} =
+	ssl_record:pending_connection_state(ConnectionStates, read),
+    try master_secret(Version, Mastersecret, SecParams,
+		      ConnectionStates, Role)
+    catch
+	exit:_ ->
+            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, key_calculation_failure)
+    end;
 
-    [PeerCert | _] = ASN1Certs,       
-    try
-	{TrustedCert, CertPath}  =
-	    ssl_certificate:trusted_cert_and_path(ASN1Certs, CertDbHandle, CertDbRef,  
-                                                  Opts#ssl_options.partial_chain),
-        ValidationFunAndState = validation_fun_and_state(Opts#ssl_options.verify_fun, Role, 
-                                                         CertDbHandle, CertDbRef,  
-                                                         Opts#ssl_options.server_name_indication,
-                                                         Opts#ssl_options.crl_check, CRLDbHandle, CertPath),
-	case public_key:pkix_path_validation(TrustedCert,
-					     CertPath,
-					     [{max_path_length,  Opts#ssl_options.depth},
-					      {verify_fun, ValidationFunAndState}]) of
-	    {ok, {PublicKeyInfo,_}} ->
-		{PeerCert, PublicKeyInfo};
-	    {error, Reason} ->
-		path_validation_alert(Reason)
-	end
+master_secret(Version, PremasterSecret, ConnectionStates, Role) ->
+    #{security_parameters := SecParams} =
+	ssl_record:pending_connection_state(ConnectionStates, read),
+    
+    #security_parameters{prf_algorithm = PrfAlgo,
+			 client_random = ClientRandom,
+			 server_random = ServerRandom} = SecParams,
+    try master_secret(Version,
+		      calc_master_secret(Version,PrfAlgo,PremasterSecret,
+					 ClientRandom, ServerRandom),
+		      SecParams, ConnectionStates, Role)
     catch
-	error:{badmatch,{asn1, Asn1Reason}} ->
-	    %% ASN-1 decode of certificate somehow failed
-            ?ALERT_REC(?FATAL, ?CERTIFICATE_UNKNOWN, {failed_to_decode_certificate, Asn1Reason});
-        error:OtherReason ->
-            ?ALERT_REC(?FATAL, ?INTERNAL_ERROR, {unexpected_error, OtherReason})
+	exit:_ ->
+            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, master_secret_calculation_failure)
     end.
 
 %%--------------------------------------------------------------------
+-spec server_key_exchange_hash(md5sha | md5 | sha | sha224 |sha256 | sha384 | sha512, binary()) -> binary().
+%%
+%% Description: Calculate server key exchange hash
+%%--------------------------------------------------------------------
+server_key_exchange_hash(md5sha, Value) ->
+    MD5 = crypto:hash(md5, Value),
+    SHA = crypto:hash(sha, Value),
+    <<MD5/binary, SHA/binary>>;
+
+server_key_exchange_hash(Hash, Value) ->
+    crypto:hash(Hash, Value).
+
+%%--------------------------------------------------------------------
 -spec verify_connection(ssl_record:ssl_version(), #finished{}, client | server, integer(), binary(),
 			ssl_handshake_history()) -> verified | #alert{}.
 %%
@@ -467,312 +479,39 @@ init_handshake_history() ->
     {[], []}.
 
 %%--------------------------------------------------------------------
--spec update_handshake_history(ssl_handshake:ssl_handshake_history(), Data ::term(), boolean()) ->
+-spec update_handshake_history(ssl_handshake:ssl_handshake_history(), Data ::term()) ->
 				      ssl_handshake:ssl_handshake_history().
 %%
 %% Description: Update the handshake history buffer with Data.
 %%--------------------------------------------------------------------
-update_handshake_history(Handshake, % special-case SSL2 client hello
-			 <<?CLIENT_HELLO, ?UINT24(_), ?BYTE(Major), ?BYTE(Minor),
-			   ?UINT16(CSLength), ?UINT16(0),
-			   ?UINT16(CDLength),
-			   CipherSuites:CSLength/binary,
-			   ChallengeData:CDLength/binary>>, true) ->
-    update_handshake_history(Handshake,
-			     <<?CLIENT_HELLO, ?BYTE(Major), ?BYTE(Minor),
-			       ?UINT16(CSLength), ?UINT16(0),
-			       ?UINT16(CDLength),
-			       CipherSuites:CSLength/binary,
-			       ChallengeData:CDLength/binary>>, true);
-update_handshake_history({Handshake0, _Prev}, Data, _) ->
+update_handshake_history({Handshake0, _Prev}, Data) ->
     {[Data|Handshake0], Handshake0}.
 
-%% %%--------------------------------------------------------------------
-%% -spec decrypt_premaster_secret(binary(), #'RSAPrivateKey'{}) -> binary().
-
-%% %%
-%% %% Description: Public key decryption using the private key.
-%% %%--------------------------------------------------------------------
-%% decrypt_premaster_secret(Secret, RSAPrivateKey) ->
-%%     try public_key:decrypt_private(Secret, RSAPrivateKey,
-%% 				   [{rsa_pad, rsa_pkcs1_padding}])
-%%     catch
-%% 	_:_ ->
-%% 	    throw(?ALERT_REC(?FATAL, ?DECRYPT_ERROR))
-%%     end.
-
-premaster_secret(OtherPublicDhKey, MyPrivateKey, #'DHParameter'{} = Params) ->
-    try 
-	public_key:compute_key(OtherPublicDhKey, MyPrivateKey, Params)  
-    catch 
-	error:computation_failed -> 
-	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
-    end;	   
-premaster_secret(PublicDhKey, PrivateDhKey, #server_dh_params{dh_p = Prime, dh_g = Base}) ->
-    try 
-	crypto:compute_key(dh, PublicDhKey, PrivateDhKey, [Prime, Base])
-    catch 
-	error:computation_failed -> 
-	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
-    end;
-premaster_secret(#client_srp_public{srp_a = ClientPublicKey}, ServerKey, #srp_user{prime = Prime,
-										   verifier = Verifier}) ->
-    case crypto:compute_key(srp, ClientPublicKey, ServerKey, {host, [Verifier, Prime, '6a']}) of
-	error ->
-	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER));
-	PremasterSecret ->
-	    PremasterSecret
-    end;
-premaster_secret(#server_srp_params{srp_n = Prime, srp_g = Generator, srp_s = Salt, srp_b = Public},
-		 ClientKeys, {Username, Password}) ->
-    case ssl_srp_primes:check_srp_params(Generator, Prime) of
-	ok ->
-	    DerivedKey = crypto:hash(sha, [Salt, crypto:hash(sha, [Username, <<$:>>, Password])]),
-	    case crypto:compute_key(srp, Public, ClientKeys, {user, [DerivedKey, Prime, Generator, '6a']}) of
-		error ->
-		    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER));
-		PremasterSecret ->
-		    PremasterSecret
-	    end;
-	_ ->
-	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
-    end;
-premaster_secret(#client_rsa_psk_identity{
-		    identity = PSKIdentity,
-		    exchange_keys = #encrypted_premaster_secret{premaster_secret = EncPMS}
-		   }, #'RSAPrivateKey'{} = Key, PSKLookup) ->
-    PremasterSecret = premaster_secret(EncPMS, Key),
-    psk_secret(PSKIdentity, PSKLookup, PremasterSecret);
-premaster_secret(#server_dhe_psk_params{
-		    hint = IdentityHint,
-		    dh_params =  #server_dh_params{dh_y = PublicDhKey} = Params},
-		    PrivateDhKey,
-		    LookupFun) ->
-    PremasterSecret = premaster_secret(PublicDhKey, PrivateDhKey, Params),
-    psk_secret(IdentityHint, LookupFun, PremasterSecret);
-
-premaster_secret(#server_ecdhe_psk_params{
-		    hint = IdentityHint,
-                    dh_params = #server_ecdh_params{
-                                   public = ECServerPubKey}},
-		    PrivateEcDhKey,
-		    LookupFun) ->
-    PremasterSecret = premaster_secret(#'ECPoint'{point = ECServerPubKey}, PrivateEcDhKey),
-    psk_secret(IdentityHint, LookupFun, PremasterSecret);
-
-premaster_secret({rsa_psk, PSKIdentity}, PSKLookup, RSAPremasterSecret) ->
-    psk_secret(PSKIdentity, PSKLookup, RSAPremasterSecret);
-
-premaster_secret(#client_ecdhe_psk_identity{
-		    identity =  PSKIdentity,
-		    dh_public = PublicEcDhPoint}, PrivateEcDhKey, PSKLookup) ->
-    PremasterSecret = premaster_secret(#'ECPoint'{point = PublicEcDhPoint}, PrivateEcDhKey),
-    psk_secret(PSKIdentity, PSKLookup, PremasterSecret).
-
-premaster_secret(#client_dhe_psk_identity{
-		    identity =  PSKIdentity,
-		    dh_public = PublicDhKey}, PrivateKey, #'DHParameter'{} = Params, PSKLookup) ->
-    PremasterSecret = premaster_secret(PublicDhKey, PrivateKey, Params),
-    psk_secret(PSKIdentity, PSKLookup, PremasterSecret).
-
-premaster_secret(#client_psk_identity{identity = PSKIdentity}, PSKLookup) ->
-    psk_secret(PSKIdentity, PSKLookup);
-premaster_secret({psk, PSKIdentity}, PSKLookup) ->
-    psk_secret(PSKIdentity, PSKLookup);
-premaster_secret(#'ECPoint'{} = ECPoint, #'ECPrivateKey'{} = ECDHKeys) ->
-    public_key:compute_key(ECPoint, ECDHKeys);
-premaster_secret(EncSecret, #'RSAPrivateKey'{} = RSAPrivateKey) ->
-    try public_key:decrypt_private(EncSecret, RSAPrivateKey,
-				   [{rsa_pad, rsa_pkcs1_padding}])
-    catch
-	_:_ ->
-	    throw(?ALERT_REC(?FATAL, ?DECRYPT_ERROR))
-    end.
-%%--------------------------------------------------------------------
--spec server_key_exchange_hash(md5sha | md5 | sha | sha224 |sha256 | sha384 | sha512, binary()) -> binary().
-%%
-%% Description: Calculate server key exchange hash
-%%--------------------------------------------------------------------
-server_key_exchange_hash(md5sha, Value) ->
-    MD5 = crypto:hash(md5, Value),
-    SHA = crypto:hash(sha, Value),
-    <<MD5/binary, SHA/binary>>;
-
-server_key_exchange_hash(Hash, Value) ->
-    crypto:hash(Hash, Value).
-%%--------------------------------------------------------------------
--spec prf(ssl_record:ssl_version(), non_neg_integer(), binary(), binary(), [binary()], non_neg_integer()) ->
-		 {ok, binary()} | {error, undefined}.
-%%
-%% Description: use the TLS PRF to generate key material
-%%--------------------------------------------------------------------
-prf({3,0}, _, _, _, _, _) ->
-    {error, undefined};
-prf({3,_N}, PRFAlgo, Secret, Label, Seed, WantedLength) ->
-    {ok, tls_v1:prf(PRFAlgo, Secret, Label, Seed, WantedLength)}.
-
-
-%%--------------------------------------------------------------------
--spec select_hashsign(#hash_sign_algos{} | undefined,  undefined | binary(), 
-		      atom(), [atom()], ssl_record:ssl_version()) ->
-			     {atom(), atom()} | undefined  | #alert{}.
-
-%%
-%% Description: Handles signature_algorithms hello extension (server)
-%%--------------------------------------------------------------------
-select_hashsign(_, undefined, _,  _, _Version) ->
-    {null, anon};
-%% The signature_algorithms extension was introduced with TLS 1.2. Ignore it if we have
-%% negotiated a lower version.
-select_hashsign(HashSigns, Cert, KeyExAlgo, 
-		undefined, {Major, Minor} = Version)  when Major >= 3 andalso Minor >= 3->
-    select_hashsign(HashSigns, Cert, KeyExAlgo, tls_v1:default_signature_algs(Version), Version);
-select_hashsign(#hash_sign_algos{hash_sign_algos = HashSigns}, Cert, KeyExAlgo, SupportedHashSigns,
-		{Major, Minor}) when Major >= 3 andalso Minor >= 3 ->
-    #'OTPCertificate'{tbsCertificate = TBSCert} = public_key:pkix_decode_cert(Cert, otp),
-    #'OTPCertificate'{tbsCertificate = TBSCert,
-		      signatureAlgorithm =  {_,SignAlgo, _}} = public_key:pkix_decode_cert(Cert, otp),
-    #'OTPSubjectPublicKeyInfo'{algorithm = {_, SubjAlgo, _}} = 
-     	TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
-
-    Sign = sign_algo(SignAlgo),
-    SubSing = sign_algo(SubjAlgo),
-
-    case lists:filter(fun({_, S} = Algos) when S == Sign ->
-			      is_acceptable_hash_sign(Algos, Sign,
-						      SubSing, KeyExAlgo, SupportedHashSigns);
-			 (_)  ->
-			      false
-		      end, HashSigns) of
-	[] ->
-            ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY, no_suitable_signature_algorithm);
-	[HashSign | _] ->
-	    HashSign
-    end;
-select_hashsign(_, Cert, _, _, Version) ->
-    #'OTPCertificate'{tbsCertificate = TBSCert} = public_key:pkix_decode_cert(Cert, otp),
-    #'OTPSubjectPublicKeyInfo'{algorithm = {_,Algo, _}} = TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
-    select_hashsign_algs(undefined, Algo, Version).
-%%--------------------------------------------------------------------
--spec select_hashsign(#certificate_request{},  binary(), 
-		      [atom()], ssl_record:ssl_version()) ->
-			     {atom(), atom()} | #alert{}.
-
-%%
-%% Description: Handles signature algorithms selection for certificate requests (client) 
-%%--------------------------------------------------------------------
-select_hashsign(#certificate_request{}, undefined, _, {Major, Minor})  when Major >= 3 andalso Minor >= 3->
-    %% There client does not have a certificate and will send an empty reply, the server may fail 
-    %% or accept the connection by its own preference. No signature algorihms needed as there is
-    %% no certificate to verify.
-    {undefined, undefined}; 
- 
-select_hashsign(#certificate_request{hashsign_algorithms = #hash_sign_algos{hash_sign_algos = HashSigns}, 
-				     certificate_types = Types}, Cert, SupportedHashSigns, 
-		{Major, Minor})  when Major >= 3 andalso Minor >= 3->
-    #'OTPCertificate'{tbsCertificate = TBSCert} = public_key:pkix_decode_cert(Cert, otp),
-    #'OTPCertificate'{tbsCertificate = TBSCert,
-		      signatureAlgorithm =  {_,SignAlgo, _}} = public_key:pkix_decode_cert(Cert, otp),
-    #'OTPSubjectPublicKeyInfo'{algorithm = {_, SubjAlgo, _}} = 
-     	TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
-
-    Sign = sign_algo(SignAlgo),
-    SubSign = sign_algo(SubjAlgo),
-    
-    case is_acceptable_cert_type(SubSign, HashSigns, Types) andalso is_supported_sign(Sign, HashSigns) of
-	true ->
-	    case lists:filter(fun({_, S} = Algos) when S == SubSign ->
-				 is_acceptable_hash_sign(Algos, SupportedHashSigns);
-			    (_)  ->
-				      false
-			      end, HashSigns) of
-		[] ->
-		    ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY, no_suitable_signature_algorithm);
-		[HashSign | _] ->
-		    HashSign
-	    end;
-	false ->
-	    ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY, no_suitable_signature_algorithm)
-    end;
-select_hashsign(#certificate_request{}, Cert, _, Version) ->
-    select_hashsign(undefined, Cert, undefined, [], Version).
-
-%%--------------------------------------------------------------------
--spec select_hashsign_algs({atom(), atom()}| undefined, oid(), ssl_record:ssl_version()) ->
-				  {atom(), atom()}.
-
-%% Description: For TLS 1.2 hash function and signature algorithm pairs can be
-%% negotiated with the signature_algorithms extension,
-%% for previous versions always use appropriate defaults.
-%% RFC 5246, Sect. 7.4.1.4.1.  Signature Algorithms
-%% If the client does not send the signature_algorithms extension, the
-%% server MUST do the following: (e.i defaults for TLS 1.2)
-%%
-%% -  If the negotiated key exchange algorithm is one of (RSA, DHE_RSA,
-%%    DH_RSA, RSA_PSK, ECDH_RSA, ECDHE_RSA), behave as if client had
-%%    sent the value {sha1,rsa}.
-%%
-%% -  If the negotiated key exchange algorithm is one of (DHE_DSS,
-%%    DH_DSS), behave as if the client had sent the value {sha1,dsa}.
-%%
-%% -  If the negotiated key exchange algorithm is one of (ECDH_ECDSA,
-%%    ECDHE_ECDSA), behave as if the client had sent value {sha1,ecdsa}.
-
-%%--------------------------------------------------------------------
-select_hashsign_algs(HashSign, _, {Major, Minor}) when HashSign =/= undefined andalso
-						       Major >= 3 andalso Minor >= 3 ->
-    HashSign;
-select_hashsign_algs(undefined, ?rsaEncryption, {Major, Minor}) when Major >= 3 andalso Minor >= 3 ->
-    {sha, rsa};
-select_hashsign_algs(undefined,?'id-ecPublicKey', _) ->
-    {sha, ecdsa};
-select_hashsign_algs(undefined, ?rsaEncryption, _) -> 
-    {md5sha, rsa};
-select_hashsign_algs(undefined, ?'id-dsa', _) ->
-    {sha, dsa}.
-
-
-%%--------------------------------------------------------------------
--spec master_secret(ssl_record:ssl_version(), #session{} | binary(), ssl_record:connection_states(),
-		   client | server) -> {binary(), ssl_record:connection_states()} | #alert{}.
-%%
-%% Description: Sets or calculates the master secret and calculate keys,
-%% updating the pending connection states. The Mastersecret and the update
-%% connection states are returned or an alert if the calculation fails.
-%%-------------------------------------------------------------------
-master_secret(Version, #session{master_secret = Mastersecret},
-	      ConnectionStates, Role) ->
-    #{security_parameters := SecParams} =
-	ssl_record:pending_connection_state(ConnectionStates, read),
-    try master_secret(Version, Mastersecret, SecParams,
-		      ConnectionStates, Role)
-    catch
-	exit:_ ->
-            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, key_calculation_failure)
-    end;
-
-master_secret(Version, PremasterSecret, ConnectionStates, Role) ->
+verify_server_key(#server_key_params{params_bin = EncParams,
+				     signature = Signature},
+		  HashSign = {HashAlgo, _},
+		  ConnectionStates, Version, PubKeyInfo) ->
     #{security_parameters := SecParams} =
 	ssl_record:pending_connection_state(ConnectionStates, read),
-    
-    #security_parameters{prf_algorithm = PrfAlgo,
-			 client_random = ClientRandom,
+    #security_parameters{client_random = ClientRandom,
 			 server_random = ServerRandom} = SecParams,
-    try master_secret(Version,
-		      calc_master_secret(Version,PrfAlgo,PremasterSecret,
-					 ClientRandom, ServerRandom),
-		      SecParams, ConnectionStates, Role)
-    catch
-	exit:_ ->
-            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, master_secret_calculation_failure)
-    end.
+    Hash = server_key_exchange_hash(HashAlgo,
+				    <<ClientRandom/binary,
+				      ServerRandom/binary,
+				      EncParams/binary>>),
+    verify_signature(Version, Hash, HashSign, Signature, PubKeyInfo).
+
+select_version(RecordCB, ClientVersion, Versions) ->
+    do_select_version(RecordCB, ClientVersion, Versions).
+
+%%====================================================================
+%% Encode handshake 
+%%====================================================================
 
-%%-------------Encode/Decode --------------------------------
 encode_handshake(#next_protocol{selected_protocol = SelectedProtocol}, _Version) ->
     PaddingLength = 32 - ((byte_size(SelectedProtocol) + 2) rem 32),
     {?NEXT_PROTOCOL, <<?BYTE((byte_size(SelectedProtocol))), SelectedProtocol/binary,
                          ?BYTE(PaddingLength), 0:(PaddingLength * 8)>>};
-
 encode_handshake(#server_hello{server_version = {Major, Minor},
 			       random = Random,
 			       session_id = Session_ID,
@@ -894,71 +633,6 @@ encode_hello_extensions([#sni{hostname = Hostname} | Rest], Acc) ->
 				    ?UINT16(HostLen), HostnameBin/binary,
 				    Acc/binary>>).
 
-enc_server_key_exchange(Version, Params, {HashAlgo, SignAlgo},
-			ClientRandom, ServerRandom, PrivateKey) ->
-    EncParams = encode_server_key(Params),
-    case HashAlgo of
-	null ->
-	    #server_key_params{params = Params,
-			       params_bin = EncParams,
-			       hashsign = {null, anon},
-			       signature = <<>>};
-	_ ->
-	    Hash =
-		server_key_exchange_hash(HashAlgo, <<ClientRandom/binary,
-						     ServerRandom/binary,
-						     EncParams/binary>>),
-	    Signature = digitally_signed(Version, Hash, HashAlgo, PrivateKey),
-	    #server_key_params{params = Params,
-			       params_bin = EncParams,
-			       hashsign = {HashAlgo, SignAlgo},
-			       signature = Signature}
-    end.
-
-%%--------------------------------------------------------------------
--spec decode_client_key(binary(), ssl_cipher:key_algo(), ssl_record:ssl_version()) ->
-			    #encrypted_premaster_secret{}
-			    | #client_diffie_hellman_public{}
-			    | #client_ec_diffie_hellman_public{}
-			    | #client_psk_identity{}
-			    | #client_dhe_psk_identity{}
-			    | #client_ecdhe_psk_identity{}
-			    | #client_rsa_psk_identity{}
-			    | #client_srp_public{}.
-%%
-%% Description: Decode client_key data and return appropriate type
-%%--------------------------------------------------------------------
-decode_client_key(ClientKey, Type, Version) ->
-    dec_client_key(ClientKey, key_exchange_alg(Type), Version).
-
-%%--------------------------------------------------------------------
--spec decode_server_key(binary(), ssl_cipher:key_algo(), ssl_record:ssl_version()) ->
-			       #server_key_params{}.
-%%
-%% Description: Decode server_key data and return appropriate type
-%%--------------------------------------------------------------------
-decode_server_key(ServerKey, Type, Version) ->
-    dec_server_key(ServerKey, key_exchange_alg(Type), Version).
-
-%%
-%% Description: Encode and decode functions for ALPN extension data.
-%%--------------------------------------------------------------------
-
-%% While the RFC opens the door to allow ALPN during renegotiation, in practice
-%% this does not work and it is recommended to ignore any ALPN extension during
-%% renegotiation, as done here.
-encode_alpn(_, true) ->
-    undefined;
-encode_alpn(undefined, _) ->
-    undefined;
-encode_alpn(Protocols, _) ->
-    #alpn{extension_data = lists:foldl(fun encode_protocol/2, <<>>, Protocols)}.
-
-decode_alpn(undefined) ->
-    undefined;
-decode_alpn(#alpn{extension_data=Data}) ->
-    decode_protocols(Data, []).
-
 encode_client_protocol_negotiation(undefined, _) ->
     undefined;
 encode_client_protocol_negotiation(_, false) ->
@@ -972,6 +646,10 @@ encode_protocols_advertised_on_server(undefined) ->
 encode_protocols_advertised_on_server(Protocols) ->
 	#next_protocol_negotiation{extension_data = lists:foldl(fun encode_protocol/2, <<>>, Protocols)}.
 
+%%====================================================================
+%% Decode handshake 
+%%====================================================================
+
 decode_handshake(_, ?HELLO_REQUEST, <<>>) ->
     #hello_request{};
 decode_handshake(_, ?NEXT_PROTOCOL, <<?BYTE(SelectedProtocolLength),
@@ -1004,7 +682,6 @@ decode_handshake(_Version, ?SERVER_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:3
        cipher_suite = Cipher_suite,
        compression_method = Comp_method,
        extensions = HelloExtensions};
-
 decode_handshake(_Version, ?CERTIFICATE, <<?UINT24(ACLen), ASN1Certs:ACLen/binary>>) ->
     #certificate{asn1_certificates = certs_to_list(ASN1Certs)};
 decode_handshake(_Version, ?SERVER_KEY_EXCHANGE, Keys) ->
@@ -1051,83 +728,30 @@ decode_hello_extensions({client, <<?UINT16(ExtLen), Extensions:ExtLen/binary>>})
 decode_hello_extensions(Extensions) ->
     dec_hello_extensions(Extensions, #hello_extensions{}).
 
-dec_server_key(<<?UINT16(PLen), P:PLen/binary,
-		 ?UINT16(GLen), G:GLen/binary,
-		 ?UINT16(YLen), Y:YLen/binary, _/binary>> = KeyStruct,
-	       ?KEY_EXCHANGE_DIFFIE_HELLMAN, Version) ->
-    Params = #server_dh_params{dh_p = P, dh_g = G, dh_y = Y},
-    {BinMsg, HashSign, Signature} = dec_server_key_params(PLen + GLen + YLen + 6, KeyStruct, Version),
-    #server_key_params{params = Params,
-		       params_bin = BinMsg,
-		       hashsign = HashSign,
-		       signature = Signature};
-%% ECParameters with named_curve
-%% TODO: explicit curve
-dec_server_key(<<?BYTE(?NAMED_CURVE), ?UINT16(CurveID),
-		 ?BYTE(PointLen), ECPoint:PointLen/binary,
-		 _/binary>> = KeyStruct,
-	       ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN, Version) ->
-    Params = #server_ecdh_params{curve = {namedCurve, tls_v1:enum_to_oid(CurveID)},
-				 public = ECPoint},
-    {BinMsg, HashSign, Signature} = dec_server_key_params(PointLen + 4, KeyStruct, Version),
-    #server_key_params{params = Params,
-		       params_bin = BinMsg,
-		       hashsign = HashSign,
-		       signature = Signature};
-dec_server_key(<<?UINT16(Len), PskIdentityHint:Len/binary, _/binary>> = KeyStruct,
-	       KeyExchange, Version)
-  when KeyExchange == ?KEY_EXCHANGE_PSK; KeyExchange == ?KEY_EXCHANGE_RSA_PSK ->
-    Params = #server_psk_params{
-		hint = PskIdentityHint},
-    {BinMsg, HashSign, Signature} = dec_server_key_params(Len + 2, KeyStruct, Version),
-    #server_key_params{params = Params,
-		       params_bin = BinMsg,
-		       hashsign = HashSign,
-		       signature = Signature};
+%%--------------------------------------------------------------------
+-spec decode_server_key(binary(), ssl_cipher:key_algo(), ssl_record:ssl_version()) ->
+			       #server_key_params{}.
+%%
+%% Description: Decode server_key data and return appropriate type
+%%--------------------------------------------------------------------
+decode_server_key(ServerKey, Type, Version) ->
+    dec_server_key(ServerKey, key_exchange_alg(Type), Version).
 
-dec_server_key(<<?UINT16(Len), IdentityHint:Len/binary,
-		 ?UINT16(PLen), P:PLen/binary,
-		 ?UINT16(GLen), G:GLen/binary,
-		 ?UINT16(YLen), Y:YLen/binary, _/binary>> = KeyStruct,
-	       ?KEY_EXCHANGE_DHE_PSK, Version) ->
-    DHParams = #server_dh_params{dh_p = P, dh_g = G, dh_y = Y},
-    Params = #server_dhe_psk_params{
-      hint = IdentityHint,
-      dh_params = DHParams},
-    {BinMsg, HashSign, Signature} = dec_server_key_params(Len + PLen + GLen + YLen + 8, KeyStruct, Version),
-    #server_key_params{params = Params,
-		       params_bin = BinMsg,
-		       hashsign = HashSign,
-		       signature = Signature};
-dec_server_key(<<?UINT16(Len), IdentityHint:Len/binary,
-		 ?BYTE(?NAMED_CURVE), ?UINT16(CurveID),
-		 ?BYTE(PointLen), ECPoint:PointLen/binary,
-		 _/binary>> = KeyStruct,
-	       ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN_PSK, Version) ->
-    DHParams = #server_ecdh_params{
-                  curve = {namedCurve, tls_v1:enum_to_oid(CurveID)},
-                  public = ECPoint},
-    Params = #server_ecdhe_psk_params{
-      hint = IdentityHint,
-      dh_params = DHParams},
-    {BinMsg, HashSign, Signature} = dec_server_key_params(Len + 2 + PointLen + 4, KeyStruct, Version),
-    #server_key_params{params = Params,
-		       params_bin = BinMsg,
-		       hashsign = HashSign,
-		       signature = Signature};
-dec_server_key(<<?UINT16(NLen), N:NLen/binary,
-		 ?UINT16(GLen), G:GLen/binary,
-		 ?BYTE(SLen), S:SLen/binary,
-		 ?UINT16(BLen), B:BLen/binary, _/binary>> = KeyStruct,
-	       ?KEY_EXCHANGE_SRP, Version) ->
-    Params = #server_srp_params{srp_n = N, srp_g = G, srp_s = S, srp_b = B},
-    {BinMsg, HashSign, Signature} = dec_server_key_params(NLen + GLen + SLen + BLen + 7, KeyStruct, Version),
-    #server_key_params{params = Params,
-		       params_bin = BinMsg,
-		       hashsign = HashSign,
-		       signature = Signature};
-dec_server_key(_, KeyExchange, _) ->
-    throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, {unknown_or_malformed_key_exchange, KeyExchange})).
+%%--------------------------------------------------------------------
+-spec decode_client_key(binary(), ssl_cipher:key_algo(), ssl_record:ssl_version()) ->
+			    #encrypted_premaster_secret{}
+			    | #client_diffie_hellman_public{}
+			    | #client_ec_diffie_hellman_public{}
+			    | #client_psk_identity{}
+			    | #client_dhe_psk_identity{}
+			    | #client_ecdhe_psk_identity{}
+			    | #client_rsa_psk_identity{}
+			    | #client_srp_public{}.
+%%
+%% Description: Decode client_key data and return appropriate type
+%%--------------------------------------------------------------------
+decode_client_key(ClientKey, Type, Version) ->
+    dec_client_key(ClientKey, key_exchange_alg(Type), Version).
 
 %%--------------------------------------------------------------------
 -spec decode_suites('2_bytes'|'3_bytes', binary()) -> list().
@@ -1139,12 +763,13 @@ decode_suites('2_bytes', Dec) ->
 decode_suites('3_bytes', Dec) ->
     from_3bytes(Dec).
 
-%%-------------Cipeher suite handling --------------------------------
+%%====================================================================
+%% Cipher suite handling
+%%====================================================================
 
 available_suites(UserSuites, Version) ->
-    lists:filtermap(fun(Suite) ->
-			    lists:member(Suite, ssl_cipher:all_suites(Version))
-		    end, UserSuites).
+    VersionSuites = ssl_cipher:all_suites(Version) ++ ssl_cipher:anonymous_suites(Version),
+    lists:filtermap(fun(Suite) -> lists:member(Suite, VersionSuites) end, UserSuites).
 
 available_suites(ServerCert, UserSuites, Version, undefined, Curve) ->
     ssl_cipher:filter(ServerCert, available_suites(UserSuites, Version))
@@ -1152,61 +777,42 @@ available_suites(ServerCert, UserSuites, Version, undefined, Curve) ->
 available_suites(ServerCert, UserSuites, Version, HashSigns, Curve) ->
     Suites = available_suites(ServerCert, UserSuites, Version, undefined, Curve),
     filter_hashsigns(Suites, [ssl_cipher:suite_definition(Suite) || Suite <- Suites], HashSigns, []).
-filter_hashsigns([], [], _, Acc) ->
-    lists:reverse(Acc);
-filter_hashsigns([Suite | Suites], [{KeyExchange,_,_,_} | Algos], HashSigns,
-		 Acc) when KeyExchange == dhe_ecdsa;
-			   KeyExchange == ecdhe_ecdsa ->
-    do_filter_hashsigns(ecdsa, Suite, Suites, Algos, HashSigns, Acc);
 
-filter_hashsigns([Suite | Suites], [{KeyExchange,_,_,_} | Algos], HashSigns,
-		 Acc) when KeyExchange == rsa;
-			   KeyExchange == dhe_rsa;
-			   KeyExchange == ecdhe_rsa;
-			   KeyExchange == srp_rsa;
-			   KeyExchange == rsa_psk ->
-    do_filter_hashsigns(rsa, Suite, Suites, Algos, HashSigns, Acc);
-filter_hashsigns([Suite | Suites], [{KeyExchange,_,_,_} | Algos], HashSigns, Acc) when 
-      KeyExchange == dhe_dss;
-      KeyExchange == srp_dss ->							       
-    do_filter_hashsigns(dsa, Suite, Suites, Algos, HashSigns, Acc);
-filter_hashsigns([Suite | Suites], [{KeyExchange,_,_,_} | Algos], HashSigns, Acc) when 
-      KeyExchange == dh_dss; 
-      KeyExchange == dh_rsa; 
-      KeyExchange == dh_ecdsa;
-      KeyExchange == ecdh_rsa;    
-      KeyExchange == ecdh_ecdsa ->
-      %%  Fixed DH certificates MAY be signed with any hash/signature
-      %%  algorithm pair appearing in the hash_sign extension.  The names
-    %%  DH_DSS, DH_RSA, ECDH_ECDSA, and ECDH_RSA are historical.
-    filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]);
-filter_hashsigns([Suite | Suites], [{KeyExchange,_,_,_} | Algos], HashSigns, Acc) when 
-      KeyExchange == dh_anon;
-      KeyExchange == ecdh_anon;
-      KeyExchange == srp_anon;
-      KeyExchange == psk;
-      KeyExchange == dhe_psk;
-      KeyExchange == ecdhe_psk ->
-    %% In this case hashsigns is not used as the kexchange is anonaymous
-    filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]).
-
-do_filter_hashsigns(SignAlgo, Suite, Suites, Algos, HashSigns, Acc) ->
-    case lists:keymember(SignAlgo, 2, HashSigns) of
-	true ->
-	    filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]);
-	false ->
-	    filter_hashsigns(Suites, Algos, HashSigns, Acc)
-    end.
-
-unavailable_ecc_suites(no_curve) ->
-    ssl_cipher:ec_keyed_suites();
-unavailable_ecc_suites(_) ->
-    [].
+available_signature_algs(undefined, _)  ->
+    undefined;
+available_signature_algs(SupportedHashSigns, Version) when Version >= {3, 3} ->
+    #hash_sign_algos{hash_sign_algos = SupportedHashSigns};
+available_signature_algs(_, _) ->
+    undefined.
+available_signature_algs(undefined, SupportedHashSigns, _, Version) when 
+      Version >= {3,3} ->
+    SupportedHashSigns;
+available_signature_algs(#hash_sign_algos{hash_sign_algos = ClientHashSigns}, SupportedHashSigns, 
+                         _, Version) when Version >= {3,3} ->
+    sets:to_list(sets:intersection(sets:from_list(ClientHashSigns), 
+				   sets:from_list(SupportedHashSigns)));
+available_signature_algs(_, _, _, _) -> 
+    undefined.
 
+cipher_suites(Suites, Renegotiation, true) ->
+    %% TLS_FALLBACK_SCSV should be placed last -RFC7507
+    cipher_suites(Suites, Renegotiation) ++ [?TLS_FALLBACK_SCSV];
+cipher_suites(Suites, Renegotiation, false) ->
+    cipher_suites(Suites, Renegotiation).
 cipher_suites(Suites, false) ->
     [?TLS_EMPTY_RENEGOTIATION_INFO_SCSV | Suites];
 cipher_suites(Suites, true) ->
     Suites.
+%%--------------------------------------------------------------------
+-spec prf(ssl_record:ssl_version(), non_neg_integer(), binary(), binary(), [binary()], non_neg_integer()) ->
+		 {ok, binary()} | {error, undefined}.
+%%
+%% Description: use the TLS PRF to generate key material
+%%--------------------------------------------------------------------
+prf({3,0}, _, _, _, _, _) ->
+    {error, undefined};
+prf({3,_N}, PRFAlgo, Secret, Label, Seed, WantedLength) ->
+    {ok, tls_v1:prf(PRFAlgo, Secret, Label, Seed, WantedLength)}.
 
 select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, Port, #session{ecc = ECCCurve} = 
 		   Session, Version,
@@ -1227,68 +833,121 @@ select_session(SuggestedSessionId, CipherSuites, HashSigns, Compressions, Port,
 	    {resumed, Resumed}
     end.
 
-%% Deprecated?
 supported_ecc({Major, Minor}) when ((Major == 3) and (Minor >= 1)) orelse (Major > 3) ->
     Curves = tls_v1:ecc_curves(Minor),
     #elliptic_curves{elliptic_curve_list = Curves};
 supported_ecc(_) ->
     #elliptic_curves{elliptic_curve_list = []}.
 
-%%-------------certificate handling --------------------------------
-
-certificate_types(_, {N, M}) when N >= 3 andalso M >= 3 ->
-    case proplists:get_bool(ecdsa,  
-			    proplists:get_value(public_keys, crypto:supports())) of
-	true ->
-	    <<?BYTE(?ECDSA_SIGN), ?BYTE(?RSA_SIGN), ?BYTE(?DSS_SIGN)>>;
-	false ->
-	    <<?BYTE(?RSA_SIGN), ?BYTE(?DSS_SIGN)>>
+premaster_secret(OtherPublicDhKey, MyPrivateKey, #'DHParameter'{} = Params) ->
+    try 
+	public_key:compute_key(OtherPublicDhKey, MyPrivateKey, Params)  
+    catch 
+	error:computation_failed -> 
+	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
+    end;	   
+premaster_secret(PublicDhKey, PrivateDhKey, #server_dh_params{dh_p = Prime, dh_g = Base}) ->
+    try 
+	crypto:compute_key(dh, PublicDhKey, PrivateDhKey, [Prime, Base])
+    catch 
+	error:computation_failed -> 
+	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
     end;
+premaster_secret(#client_srp_public{srp_a = ClientPublicKey}, ServerKey, #srp_user{prime = Prime,
+										   verifier = Verifier}) ->
+    case crypto:compute_key(srp, ClientPublicKey, ServerKey, {host, [Verifier, Prime, '6a']}) of
+	error ->
+	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER));
+	PremasterSecret ->
+	    PremasterSecret
+    end;
+premaster_secret(#server_srp_params{srp_n = Prime, srp_g = Generator, srp_s = Salt, srp_b = Public},
+		 ClientKeys, {Username, Password}) ->
+    case ssl_srp_primes:check_srp_params(Generator, Prime) of
+	ok ->
+	    DerivedKey = crypto:hash(sha, [Salt, crypto:hash(sha, [Username, <<$:>>, Password])]),
+	    case crypto:compute_key(srp, Public, ClientKeys, {user, [DerivedKey, Prime, Generator, '6a']}) of
+		error ->
+		    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER));
+		PremasterSecret ->
+		    PremasterSecret
+	    end;
+	_ ->
+	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
+    end;
+premaster_secret(#client_rsa_psk_identity{
+		    identity = PSKIdentity,
+		    exchange_keys = #encrypted_premaster_secret{premaster_secret = EncPMS}
+		   }, #'RSAPrivateKey'{} = Key, PSKLookup) ->
+    PremasterSecret = premaster_secret(EncPMS, Key),
+    psk_secret(PSKIdentity, PSKLookup, PremasterSecret);
+premaster_secret(#server_dhe_psk_params{
+		    hint = IdentityHint,
+		    dh_params =  #server_dh_params{dh_y = PublicDhKey} = Params},
+		    PrivateDhKey,
+		    LookupFun) ->
+    PremasterSecret = premaster_secret(PublicDhKey, PrivateDhKey, Params),
+    psk_secret(IdentityHint, LookupFun, PremasterSecret);
+premaster_secret(#server_ecdhe_psk_params{
+		    hint = IdentityHint,
+                    dh_params = #server_ecdh_params{
+                                   public = ECServerPubKey}},
+		    PrivateEcDhKey,
+		    LookupFun) ->
+    PremasterSecret = premaster_secret(#'ECPoint'{point = ECServerPubKey}, PrivateEcDhKey),
+    psk_secret(IdentityHint, LookupFun, PremasterSecret);
+premaster_secret({rsa_psk, PSKIdentity}, PSKLookup, RSAPremasterSecret) ->
+    psk_secret(PSKIdentity, PSKLookup, RSAPremasterSecret);
+premaster_secret(#client_ecdhe_psk_identity{
+		    identity =  PSKIdentity,
+		    dh_public = PublicEcDhPoint}, PrivateEcDhKey, PSKLookup) ->
+    PremasterSecret = premaster_secret(#'ECPoint'{point = PublicEcDhPoint}, PrivateEcDhKey),
+    psk_secret(PSKIdentity, PSKLookup, PremasterSecret).
+premaster_secret(#client_dhe_psk_identity{
+		    identity =  PSKIdentity,
+		    dh_public = PublicDhKey}, PrivateKey, #'DHParameter'{} = Params, PSKLookup) ->
+    PremasterSecret = premaster_secret(PublicDhKey, PrivateKey, Params),
+    psk_secret(PSKIdentity, PSKLookup, PremasterSecret).
+premaster_secret(#client_psk_identity{identity = PSKIdentity}, PSKLookup) ->
+    psk_secret(PSKIdentity, PSKLookup);
+premaster_secret({psk, PSKIdentity}, PSKLookup) ->
+    psk_secret(PSKIdentity, PSKLookup);
+premaster_secret(#'ECPoint'{} = ECPoint, #'ECPrivateKey'{} = ECDHKeys) ->
+    public_key:compute_key(ECPoint, ECDHKeys);
+premaster_secret(EncSecret, #'RSAPrivateKey'{} = RSAPrivateKey) ->
+    try public_key:decrypt_private(EncSecret, RSAPrivateKey,
+				   [{rsa_pad, rsa_pkcs1_padding}])
+    catch
+	_:_ ->
+	    throw(?ALERT_REC(?FATAL, ?DECRYPT_ERROR))
+    end.
+%%====================================================================
+%% Extensions handling
+%%====================================================================
+client_hello_extensions(Version, CipherSuites, 
+			#ssl_options{signature_algs = SupportedHashSigns,
+				     eccs = SupportedECCs} = SslOpts, ConnectionStates, Renegotiation) ->
+    {EcPointFormats, EllipticCurves} =
+	case advertises_ec_ciphers(lists:map(fun ssl_cipher:suite_definition/1, CipherSuites)) of
+	    true ->
+		client_ecc_extensions(SupportedECCs);
+	    false ->
+		{undefined, undefined}
+	end,
+    SRP = srp_user(SslOpts),
 
-certificate_types({KeyExchange, _, _, _}, _) when KeyExchange == rsa;
-						  KeyExchange == dh_rsa;
-						  KeyExchange == dhe_rsa;
-						  KeyExchange == ecdhe_rsa ->
-    <<?BYTE(?RSA_SIGN)>>;
-
-certificate_types({KeyExchange, _, _, _}, _)  when KeyExchange == dh_dss; 
-						   KeyExchange == dhe_dss;
-						   KeyExchange == srp_dss ->
-    <<?BYTE(?DSS_SIGN)>>;
-
-certificate_types({KeyExchange, _, _, _}, _) when KeyExchange == dh_ecdsa;
-						  KeyExchange == dhe_ecdsa;
-						  KeyExchange == ecdh_ecdsa;
-						  KeyExchange == ecdhe_ecdsa ->
-    <<?BYTE(?ECDSA_SIGN)>>;
-
-certificate_types(_, _) ->
-    <<?BYTE(?RSA_SIGN)>>.
-
-certificate_authorities(CertDbHandle, CertDbRef) ->
-    Authorities = certificate_authorities_from_db(CertDbHandle, CertDbRef),
-    Enc = fun(#'OTPCertificate'{tbsCertificate=TBSCert}) ->
-		  OTPSubj = TBSCert#'OTPTBSCertificate'.subject,
-		  DNEncodedBin = public_key:pkix_encode('Name', OTPSubj, otp),
-		  DNEncodedLen = byte_size(DNEncodedBin),
-		  <<?UINT16(DNEncodedLen), DNEncodedBin/binary>>
-	  end,
-    list_to_binary([Enc(Cert) || {_, Cert} <- Authorities]).
-
-certificate_authorities_from_db(CertDbHandle, CertDbRef) when is_reference(CertDbRef) ->
-    ConnectionCerts = fun({{Ref, _, _}, Cert}, Acc) when Ref  == CertDbRef ->
-			      [Cert | Acc];
-			 (_, Acc) ->
-			      Acc
-		      end,
-    ssl_pkix_db:foldl(ConnectionCerts, [], CertDbHandle);
-certificate_authorities_from_db(_CertDbHandle, {extracted, CertDbData}) ->
-    %% Cache disabled, Ref contains data
-    lists:foldl(fun({decoded, {_Key,Cert}}, Acc) -> [Cert | Acc] end,
-		[], CertDbData).
-
-
-%%-------------Extension handling --------------------------------
+    #hello_extensions{
+       renegotiation_info = renegotiation_info(tls_record, client,
+					       ConnectionStates, Renegotiation),
+       srp = SRP,
+       signature_algs = available_signature_algs(SupportedHashSigns, Version),
+       ec_point_formats = EcPointFormats,
+       elliptic_curves = EllipticCurves,
+       alpn = encode_alpn(SslOpts#ssl_options.alpn_advertised_protocols, Renegotiation),
+       next_protocol_negotiation =
+	   encode_client_protocol_negotiation(SslOpts#ssl_options.next_protocol_selector,
+					      Renegotiation),
+       sni = sni(SslOpts#ssl_options.server_name_indication)}.
 
 handle_client_hello_extensions(RecordCB, Random, ClientCipherSuites,
 			       #hello_extensions{renegotiation_info = Info,
@@ -1365,231 +1024,208 @@ handle_server_hello_extensions(RecordCB, Random, CipherSuite, Compression,
             ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, too_many_protocols_in_server_hello)
     end.
 
-select_version(RecordCB, ClientVersion, Versions) ->
-    do_select_version(RecordCB, ClientVersion, Versions).
-
-do_select_version(_, ClientVersion, []) ->
-    ClientVersion;
-do_select_version(RecordCB, ClientVersion, [Version | Versions]) ->
-    case RecordCB:is_higher(Version, ClientVersion) of
-	true ->
-	    %% Version too high for client - keep looking
-	    do_select_version(RecordCB, ClientVersion, Versions);
-	false ->
-	    %% Version ok for client - look for a higher
-	    do_select_version(RecordCB, ClientVersion, Versions, Version)
-    end.
-%%
-do_select_version(_, _, [], GoodVersion) ->
-    GoodVersion;
-do_select_version(
-  RecordCB, ClientVersion, [Version | Versions], GoodVersion) ->
-    BetterVersion =
-	case RecordCB:is_higher(Version, ClientVersion) of
-	    true ->
-		%% Version too high for client
-		GoodVersion;
-	    false ->
-		%% Version ok for client
-		case RecordCB:is_higher(Version, GoodVersion) of
-		    true ->
-			%% Use higher version
-			Version;
-		    false ->
-			GoodVersion
-		end
-	end,
-    do_select_version(RecordCB, ClientVersion, Versions, BetterVersion).
+select_curve(Client, Server) ->
+    select_curve(Client, Server, false).
 
-renegotiation_info(_, client, _, false) ->
-    #renegotiation_info{renegotiated_connection = undefined};
-renegotiation_info(_RecordCB, server, ConnectionStates, false) ->
-    ConnectionState  = ssl_record:current_connection_state(ConnectionStates, read),
-    case maps:get(secure_renegotiation, ConnectionState) of
-	true ->
-	    #renegotiation_info{renegotiated_connection = ?byte(0)};
-	false ->
-	    #renegotiation_info{renegotiated_connection = undefined}
-    end;
-renegotiation_info(_RecordCB, client, ConnectionStates, true) ->
-    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
-    case  maps:get(secure_renegotiation, ConnectionState) of
-	true ->
-	    Data = maps:get(client_verify_data, ConnectionState),
-	    #renegotiation_info{renegotiated_connection = Data};
-	false ->
-	    #renegotiation_info{renegotiated_connection = undefined}
+select_curve(#elliptic_curves{elliptic_curve_list = ClientCurves},
+	     #elliptic_curves{elliptic_curve_list = ServerCurves},
+	     ServerOrder) ->
+    case ServerOrder of
+        false ->
+            select_shared_curve(ClientCurves, ServerCurves);
+        true ->
+            select_shared_curve(ServerCurves, ClientCurves)
     end;
+select_curve(undefined, _, _) ->
+    %% Client did not send ECC extension use default curve if 
+    %% ECC cipher is negotiated
+    {namedCurve, ?secp256r1}.
 
-renegotiation_info(_RecordCB, server, ConnectionStates, true) ->
-    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
-    case maps:get(secure_renegotiation, ConnectionState) of
-	true ->
-	    CData = maps:get(client_verify_data, ConnectionState),
-	    SData = maps:get(server_verify_data, ConnectionState),
-	    #renegotiation_info{renegotiated_connection = <<CData/binary, SData/binary>>};
-	false ->
-	    #renegotiation_info{renegotiated_connection = undefined}
-    end.
+%%--------------------------------------------------------------------
+-spec select_hashsign(#hash_sign_algos{} | undefined,  undefined | binary(), 
+		      atom(), [atom()], ssl_record:ssl_version()) ->
+			     {atom(), atom()} | undefined  | #alert{}.
 
-handle_renegotiation_info(_RecordCB, _, #renegotiation_info{renegotiated_connection = ?byte(0)},
-			  ConnectionStates, false, _, _) ->
-    {ok, ssl_record:set_renegotiation_flag(true, ConnectionStates)};
+%%
+%% Description: Handles signature_algorithms hello extension (server)
+%%--------------------------------------------------------------------
+select_hashsign(_, _, KeyExAlgo, _, _Version) when KeyExAlgo == dh_anon;
+                                                   KeyExAlgo == ecdh_anon;
+                                                   KeyExAlgo == srp_anon ->
+    {null, anon};
+%% The signature_algorithms extension was introduced with TLS 1.2. Ignore it if we have
+%% negotiated a lower version.
+select_hashsign(HashSigns, Cert, KeyExAlgo, 
+		undefined, {Major, Minor} = Version)  when Major >= 3 andalso Minor >= 3->
+    select_hashsign(HashSigns, Cert, KeyExAlgo, tls_v1:default_signature_algs(Version), Version);
+select_hashsign(#hash_sign_algos{hash_sign_algos = HashSigns}, Cert, KeyExAlgo, SupportedHashSigns,
+		{Major, Minor}) when Major >= 3 andalso Minor >= 3 ->
+    #'OTPCertificate'{tbsCertificate = TBSCert,
+		      signatureAlgorithm =  {_,SignAlgo, _}} = public_key:pkix_decode_cert(Cert, otp),
+    #'OTPSubjectPublicKeyInfo'{algorithm = {_, SubjAlgo, _}} = 
+     	TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
 
-handle_renegotiation_info(_RecordCB, server, undefined, ConnectionStates, _, _, CipherSuites) ->
-    case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of
-	true ->
-	    {ok, ssl_record:set_renegotiation_flag(true, ConnectionStates)};
-	false ->
-	    {ok, ssl_record:set_renegotiation_flag(false, ConnectionStates)}
+    Sign = sign_algo(SignAlgo),
+    SubSing = sign_algo(SubjAlgo),
+
+    case lists:filter(fun({_, S} = Algos) when S == Sign ->
+			      is_acceptable_hash_sign(Algos, Sign,
+						      SubSing, KeyExAlgo, SupportedHashSigns);
+			 (_)  ->
+			      false
+		      end, HashSigns) of
+	[] ->
+            ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY, no_suitable_signature_algorithm);
+	[HashSign | _] ->
+	    HashSign
     end;
+select_hashsign(_, Cert, _, _, Version) ->
+    #'OTPCertificate'{tbsCertificate = TBSCert} = public_key:pkix_decode_cert(Cert, otp),
+    #'OTPSubjectPublicKeyInfo'{algorithm = {_,Algo, _}} = TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
+    select_hashsign_algs(undefined, Algo, Version).
+%%--------------------------------------------------------------------
+-spec select_hashsign(#certificate_request{},  binary(), 
+		      [atom()], ssl_record:ssl_version()) ->
+			     {atom(), atom()} | #alert{}.
 
-handle_renegotiation_info(_RecordCB, _, undefined, ConnectionStates, false, _, _) ->
-    {ok, ssl_record:set_renegotiation_flag(false, ConnectionStates)};
+%%
+%% Description: Handles signature algorithms selection for certificate requests (client) 
+%%--------------------------------------------------------------------
+select_hashsign(#certificate_request{}, undefined, _, {Major, Minor})  when Major >= 3 andalso Minor >= 3->
+    %% There client does not have a certificate and will send an empty reply, the server may fail 
+    %% or accept the connection by its own preference. No signature algorihms needed as there is
+    %% no certificate to verify.
+    {undefined, undefined}; 
+ 
+select_hashsign(#certificate_request{hashsign_algorithms = #hash_sign_algos{hash_sign_algos = HashSigns}, 
+				     certificate_types = Types}, Cert, SupportedHashSigns, 
+		{Major, Minor})  when Major >= 3 andalso Minor >= 3->
+    #'OTPCertificate'{tbsCertificate = TBSCert} = public_key:pkix_decode_cert(Cert, otp),
+    #'OTPCertificate'{tbsCertificate = TBSCert,
+		      signatureAlgorithm =  {_,SignAlgo, _}} = public_key:pkix_decode_cert(Cert, otp),
+    #'OTPSubjectPublicKeyInfo'{algorithm = {_, SubjAlgo, _}} = 
+     	TBSCert#'OTPTBSCertificate'.subjectPublicKeyInfo,
 
-handle_renegotiation_info(_RecordCB, client, #renegotiation_info{renegotiated_connection = ClientServerVerify},
-			  ConnectionStates, true, _, _) ->
-    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
-    CData = maps:get(client_verify_data, ConnectionState),
-    SData = maps:get(server_verify_data, ConnectionState),
-    case <<CData/binary, SData/binary>> == ClientServerVerify of
+    Sign = sign_algo(SignAlgo),
+    SubSign = sign_algo(SubjAlgo),
+    
+    case is_acceptable_cert_type(SubSign, HashSigns, Types) andalso is_supported_sign(Sign, HashSigns) of
 	true ->
-	    {ok, ConnectionStates};
+	    case lists:filter(fun({_, S} = Algos) when S == SubSign ->
+				 is_acceptable_hash_sign(Algos, SupportedHashSigns);
+			    (_)  ->
+				      false
+			      end, HashSigns) of
+		[] ->
+		    ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY, no_suitable_signature_algorithm);
+		[HashSign | _] ->
+		    HashSign
+	    end;
 	false ->
-            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, client_renegotiation)
+	    ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY, no_suitable_signature_algorithm)
     end;
-handle_renegotiation_info(_RecordCB, server, #renegotiation_info{renegotiated_connection = ClientVerify},
-			  ConnectionStates, true, _, CipherSuites) ->
-
-      case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of
-	  true ->
-              ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, {server_renegotiation, empty_renegotiation_info_scsv});
-	  false ->
-	      ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
-	      Data =  maps:get(client_verify_data, ConnectionState),
-	      case Data == ClientVerify of
-		  true ->
-		      {ok, ConnectionStates};
-		  false ->
-                      ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, server_renegotiation)
-	      end
-      end;
-
-handle_renegotiation_info(RecordCB, client, undefined, ConnectionStates, true, SecureRenegotation, _) ->
-    handle_renegotiation_info(RecordCB, ConnectionStates, SecureRenegotation);
+select_hashsign(#certificate_request{}, Cert, _, Version) ->
+    select_hashsign(undefined, Cert, undefined, [], Version).
 
-handle_renegotiation_info(RecordCB, server, undefined, ConnectionStates, true, SecureRenegotation, CipherSuites) ->
-     case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of
-	  true ->
-             ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, {server_renegotiation, empty_renegotiation_info_scsv});
-	 false ->
-	     handle_renegotiation_info(RecordCB, ConnectionStates, SecureRenegotation)
-     end.
+%%--------------------------------------------------------------------
+-spec select_hashsign_algs({atom(), atom()}| undefined, oid(), ssl_record:ssl_version()) ->
+				  {atom(), atom()}.
 
-handle_renegotiation_info(_RecordCB, ConnectionStates, SecureRenegotation) ->
-    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
-    case {SecureRenegotation, maps:get(secure_renegotiation, ConnectionState)} of
-	{_, true} ->
-            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, already_secure);
-	{true, false} ->
-	    ?ALERT_REC(?FATAL, ?NO_RENEGOTIATION);
-	{false, false} ->
-	    {ok, ConnectionStates}
-    end.
+%% Description: For TLS 1.2 hash function and signature algorithm pairs can be
+%% negotiated with the signature_algorithms extension,
+%% for previous versions always use appropriate defaults.
+%% RFC 5246, Sect. 7.4.1.4.1.  Signature Algorithms
+%% If the client does not send the signature_algorithms extension, the
+%% server MUST do the following: (e.i defaults for TLS 1.2)
+%%
+%% -  If the negotiated key exchange algorithm is one of (RSA, DHE_RSA,
+%%    DH_RSA, RSA_PSK, ECDH_RSA, ECDHE_RSA), behave as if client had
+%%    sent the value {sha1,rsa}.
+%%
+%% -  If the negotiated key exchange algorithm is one of (DHE_DSS,
+%%    DH_DSS), behave as if the client had sent the value {sha1,dsa}.
+%%
+%% -  If the negotiated key exchange algorithm is one of (ECDH_ECDSA,
+%%    ECDHE_ECDSA), behave as if the client had sent value {sha1,ecdsa}.
 
-hello_extensions_list(#hello_extensions{renegotiation_info = RenegotiationInfo,
-					srp = SRP,
-					signature_algs = HashSigns,
-					ec_point_formats = EcPointFormats,
-					elliptic_curves = EllipticCurves,
-                                        alpn = ALPN,
-					next_protocol_negotiation = NextProtocolNegotiation,
-					sni = Sni}) ->
-    [Ext || Ext <- [RenegotiationInfo, SRP, HashSigns,
-		    EcPointFormats, EllipticCurves, ALPN, NextProtocolNegotiation, Sni], Ext =/= undefined].
+%%--------------------------------------------------------------------
+select_hashsign_algs(HashSign, _, {Major, Minor}) when HashSign =/= undefined andalso
+						       Major >= 3 andalso Minor >= 3 ->
+    HashSign;
+select_hashsign_algs(undefined, ?rsaEncryption, {Major, Minor}) when Major >= 3 andalso Minor >= 3 ->
+    {sha, rsa};
+select_hashsign_algs(undefined,?'id-ecPublicKey', _) ->
+    {sha, ecdsa};
+select_hashsign_algs(undefined, ?rsaEncryption, _) -> 
+    {md5sha, rsa};
+select_hashsign_algs(undefined, ?'id-dsa', _) ->
+    {sha, dsa}.
 
 srp_user(#ssl_options{srp_identity = {UserName, _}}) ->
     #srp{username = UserName};
 srp_user(_) ->
     undefined.
 
-client_ecc_extensions(SupportedECCs) ->
-    CryptoSupport = proplists:get_value(public_keys, crypto:supports()),
-    case proplists:get_bool(ecdh, CryptoSupport) of
-	true ->
-	    EcPointFormats = #ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]},
-	    EllipticCurves = SupportedECCs,
-	    {EcPointFormats, EllipticCurves};
-	_ ->
-	    {undefined, undefined}
-    end.
+%%--------------------------------------------------------------------
+%%% Internal functions
+%%--------------------------------------------------------------------
+%%------------- Create handshake messages ----------------------------
 
-server_ecc_extension(_Version, EcPointFormats) ->
-    CryptoSupport = proplists:get_value(public_keys, crypto:supports()),
-    case proplists:get_bool(ecdh, CryptoSupport) of
+int_to_bin(I) ->
+    L = (length(integer_to_list(I, 16)) + 1) div 2,
+    <<I:(L*8)>>.
+
+certificate_types(_, {N, M}) when N >= 3 andalso M >= 3 ->
+    case proplists:get_bool(ecdsa,  
+			    proplists:get_value(public_keys, crypto:supports())) of
 	true ->
-	    handle_ecc_point_fmt_extension(EcPointFormats);
+	    <<?BYTE(?ECDSA_SIGN), ?BYTE(?RSA_SIGN), ?BYTE(?DSS_SIGN)>>;
 	false ->
-	    undefined
-    end.
-
-handle_ecc_point_fmt_extension(undefined) ->
-    undefined;
-handle_ecc_point_fmt_extension(_) ->
-    #ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]}.
+	    <<?BYTE(?RSA_SIGN), ?BYTE(?DSS_SIGN)>>
+    end;
 
-advertises_ec_ciphers([]) ->
-    false;
-advertises_ec_ciphers([{ecdh_ecdsa, _,_,_} | _]) ->
-    true;
-advertises_ec_ciphers([{ecdhe_ecdsa, _,_,_} | _]) ->
-    true;
-advertises_ec_ciphers([{ecdh_rsa, _,_,_} | _]) ->
-    true;
-advertises_ec_ciphers([{ecdhe_rsa, _,_,_} | _]) ->
-    true;
-advertises_ec_ciphers([{ecdh_anon, _,_,_} | _]) ->
-    true;
-advertises_ec_ciphers([{ecdhe_psk, _,_,_} | _]) ->
-    true;
-advertises_ec_ciphers([_| Rest]) ->
-    advertises_ec_ciphers(Rest).
+certificate_types(#{key_exchange := KeyExchange}, _) when KeyExchange == rsa;
+                                                          KeyExchange == dh_rsa;
+                                                          KeyExchange == dhe_rsa;
+                                                          KeyExchange == ecdhe_rsa ->
+    <<?BYTE(?RSA_SIGN)>>;
 
-select_curve(Client, Server) ->
-    select_curve(Client, Server, false).
+certificate_types(#{key_exchange := KeyExchange}, _)  when KeyExchange == dh_dss; 
+                                                           KeyExchange == dhe_dss;
+                                                           KeyExchange == srp_dss ->
+    <<?BYTE(?DSS_SIGN)>>;
 
-select_curve(#elliptic_curves{elliptic_curve_list = ClientCurves},
-	     #elliptic_curves{elliptic_curve_list = ServerCurves},
-	     ServerOrder) ->
-    case ServerOrder of
-        false ->
-            select_shared_curve(ClientCurves, ServerCurves);
-        true ->
-            select_shared_curve(ServerCurves, ClientCurves)
-    end;
-select_curve(undefined, _, _) ->
-    %% Client did not send ECC extension use default curve if 
-    %% ECC cipher is negotiated
-    {namedCurve, ?secp256r1}.
+certificate_types(#{key_exchange := KeyExchange}, _) when KeyExchange == dh_ecdsa;
+                                                          KeyExchange == dhe_ecdsa;
+                                                          KeyExchange == ecdh_ecdsa;
+                                                          KeyExchange == ecdhe_ecdsa ->
+    <<?BYTE(?ECDSA_SIGN)>>;
+certificate_types(_, _) ->
+    <<?BYTE(?RSA_SIGN)>>.
 
-select_shared_curve([], _) ->
-    no_curve;
-select_shared_curve([Curve | Rest], Curves) ->
-    case lists:member(Curve, Curves) of
-	true ->
-	    {namedCurve, Curve};
-	false ->
-	    select_shared_curve(Rest, Curves)
-    end.
+certificate_authorities(CertDbHandle, CertDbRef) ->
+    Authorities = certificate_authorities_from_db(CertDbHandle, CertDbRef),
+    Enc = fun(#'OTPCertificate'{tbsCertificate=TBSCert}) ->
+		  OTPSubj = TBSCert#'OTPTBSCertificate'.subject,
+		  DNEncodedBin = public_key:pkix_encode('Name', OTPSubj, otp),
+		  DNEncodedLen = byte_size(DNEncodedBin),
+		  <<?UINT16(DNEncodedLen), DNEncodedBin/binary>>
+	  end,
+    list_to_binary([Enc(Cert) || {_, Cert} <- Authorities]).
 
-sni(undefined) ->
-    undefined;
-sni(Hostname) ->
-    #sni{hostname = Hostname}.
+certificate_authorities_from_db(CertDbHandle, CertDbRef) when is_reference(CertDbRef) ->
+    ConnectionCerts = fun({{Ref, _, _}, Cert}, Acc) when Ref  == CertDbRef ->
+			      [Cert | Acc];
+			 (_, Acc) ->
+			      Acc
+		      end,
+    ssl_pkix_db:foldl(ConnectionCerts, [], CertDbHandle);
+certificate_authorities_from_db(_CertDbHandle, {extracted, CertDbData}) ->
+    %% Cache disabled, Ref contains data
+    lists:foldl(fun({decoded, {_Key,Cert}}, Acc) -> [Cert | Acc] end,
+		[], CertDbData).
 
-%%--------------------------------------------------------------------
-%%% Internal functions
-%%--------------------------------------------------------------------
+%%-------------Handle handshake messages --------------------------------
 validation_fun_and_state({Fun, UserState0}, Role,  CertDbHandle, CertDbRef, 
                          ServerNameIndication, CRLCheck, CRLDbHandle, CertPath) ->
     {fun(OtpCert, {extension, _} = Extension, {SslState, UserState}) ->
@@ -1681,17 +1317,6 @@ path_validation_alert({bad_cert, unknown_ca}) ->
 path_validation_alert(Reason) ->
     ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, Reason).
 
-encrypted_premaster_secret(Secret, RSAPublicKey) ->
-    try
-	PreMasterSecret = public_key:encrypt_public(Secret, RSAPublicKey,
-						    [{rsa_pad,
-						      rsa_pkcs1_padding}]),
-	#encrypted_premaster_secret{premaster_secret = PreMasterSecret}
-    catch
-        _:_->
-            throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, premaster_encryption_failed))
-    end.
-
 digitally_signed(Version, Hashes, HashAlgo, PrivateKey) ->
     try do_digitally_signed(Version, Hashes, HashAlgo, PrivateKey) of
 	Signature ->
@@ -1700,17 +1325,123 @@ digitally_signed(Version, Hashes, HashAlgo, PrivateKey) ->
 	error:badkey->
 	    throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, bad_key(PrivateKey)))
     end.
-
+do_digitally_signed({3, Minor}, Hash, HashAlgo, #{algorithm := Alg} = Engine) 
+  when Minor >= 3 ->
+    crypto:sign(Alg, HashAlgo, {digest, Hash}, maps:remove(algorithm, Engine));
 do_digitally_signed({3, Minor}, Hash, HashAlgo, Key) when Minor >= 3 ->
     public_key:sign({digest, Hash}, HashAlgo, Key);
-do_digitally_signed(_Version, Hash, HashAlgo, #'DSAPrivateKey'{} = Key) ->
-    public_key:sign({digest, Hash}, HashAlgo, Key);
 do_digitally_signed(_Version, Hash, _HashAlgo, #'RSAPrivateKey'{} = Key) ->
     public_key:encrypt_private(Hash, Key,
 			       [{rsa_pad, rsa_pkcs1_padding}]);
+do_digitally_signed({3, _}, Hash, _, 
+                    #{algorithm := rsa} = Engine) ->
+    crypto:private_encrypt(rsa, Hash, maps:remove(algorithm, Engine),
+                           rsa_pkcs1_padding);
+do_digitally_signed({3, _}, Hash, HashAlgo, #{algorithm := Alg} = Engine) ->
+    crypto:sign(Alg, HashAlgo, {digest, Hash}, maps:remove(algorithm, Engine));
 do_digitally_signed(_Version, Hash, HashAlgo, Key) ->
     public_key:sign({digest, Hash}, HashAlgo, Key).
 
+bad_key(#'DSAPrivateKey'{}) ->
+    unacceptable_dsa_key;
+bad_key(#'RSAPrivateKey'{}) ->
+    unacceptable_rsa_key;
+bad_key(#'ECPrivateKey'{}) ->
+    unacceptable_ecdsa_key.
+
+crl_check(_, false, _,_,_, _, _) ->
+    valid;
+crl_check(_, peer, _, _,_, valid, _) -> %% Do not check CAs with this option.
+    valid;
+crl_check(OtpCert, Check, CertDbHandle, CertDbRef, {Callback, CRLDbHandle}, _, CertPath) ->
+    Options = [{issuer_fun, {fun(_DP, CRL, Issuer, DBInfo) ->
+				     ssl_crl:trusted_cert_and_path(CRL, Issuer, {CertPath,
+                                                                                 DBInfo})
+			     end, {CertDbHandle, CertDbRef}}}, 
+	       {update_crl, fun(DP, CRL) -> Callback:fresh_crl(DP, CRL) end},
+               {undetermined_details, true}
+	      ],
+    case dps_and_crls(OtpCert, Callback, CRLDbHandle, ext) of
+	no_dps ->
+	    crl_check_same_issuer(OtpCert, Check,
+				  dps_and_crls(OtpCert, Callback, CRLDbHandle, same_issuer),
+				  Options);
+	DpsAndCRLs ->  %% This DP list may be empty if relevant CRLs existed 
+	    %% but could not be retrived, will result in {bad_cert, revocation_status_undetermined}
+	    case public_key:pkix_crls_validate(OtpCert, DpsAndCRLs, Options) of
+		{bad_cert, {revocation_status_undetermined, _}} ->
+		    crl_check_same_issuer(OtpCert, Check, dps_and_crls(OtpCert, Callback, 
+								       CRLDbHandle, same_issuer), Options);
+		Other ->
+		    Other
+	    end
+    end.
+
+crl_check_same_issuer(OtpCert, best_effort, Dps, Options) ->		
+    case public_key:pkix_crls_validate(OtpCert, Dps, Options) of 
+	{bad_cert, {revocation_status_undetermined, _}}   ->
+	    valid;
+	Other ->
+	    Other
+    end;
+crl_check_same_issuer(OtpCert, _, Dps, Options) ->    
+    public_key:pkix_crls_validate(OtpCert, Dps, Options).
+
+dps_and_crls(OtpCert, Callback, CRLDbHandle, ext) ->
+    case public_key:pkix_dist_points(OtpCert) of
+	[] ->
+	    no_dps;
+	DistPoints ->
+	    Issuer = OtpCert#'OTPCertificate'.tbsCertificate#'OTPTBSCertificate'.issuer,
+	    CRLs = distpoints_lookup(DistPoints, Issuer, Callback, CRLDbHandle),
+            dps_and_crls(DistPoints, CRLs, [])
+    end;
+
+dps_and_crls(OtpCert, Callback, CRLDbHandle, same_issuer) ->    
+    DP = #'DistributionPoint'{distributionPoint = {fullName, GenNames}} = 
+	public_key:pkix_dist_point(OtpCert),
+    CRLs = lists:flatmap(fun({directoryName, Issuer}) -> 
+				 Callback:select(Issuer, CRLDbHandle);
+			    (_) ->
+				 []
+			 end, GenNames),
+    [{DP, {CRL, public_key:der_decode('CertificateList', CRL)}} ||  CRL <- CRLs].
+
+dps_and_crls([], _, Acc) ->
+    Acc;
+dps_and_crls([DP | Rest], CRLs, Acc) ->
+    DpCRL = [{DP, {CRL, public_key:der_decode('CertificateList', CRL)}} ||  CRL <- CRLs],
+    dps_and_crls(Rest, CRLs, DpCRL ++ Acc).
+    
+distpoints_lookup([],_, _, _) ->
+    [];
+distpoints_lookup([DistPoint | Rest], Issuer, Callback, CRLDbHandle) ->
+    Result =
+	try Callback:lookup(DistPoint, Issuer, CRLDbHandle)
+	catch
+	    error:undef ->
+		%% The callback module still uses the 2-argument
+		%% version of the lookup function.
+		Callback:lookup(DistPoint, CRLDbHandle)
+	end,
+    case Result of
+	not_available ->
+	    distpoints_lookup(Rest, Issuer, Callback, CRLDbHandle);
+	CRLs ->
+	    CRLs
+    end.
+
+encrypted_premaster_secret(Secret, RSAPublicKey) ->
+    try
+	PreMasterSecret = public_key:encrypt_public(Secret, RSAPublicKey,
+						    [{rsa_pad,
+						      rsa_pkcs1_padding}]),
+	#encrypted_premaster_secret{premaster_secret = PreMasterSecret}
+    catch
+        _:_->
+            throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, premaster_encryption_failed))
+    end.
+
 calc_certificate_verify({3, 0}, HashAlgo, MasterSecret, Handshake) ->
     ssl_v3:certificate_verify(HashAlgo, MasterSecret, lists:reverse(Handshake));
 calc_certificate_verify({3, N}, HashAlgo, _MasterSecret, Handshake) ->
@@ -1763,24 +1494,7 @@ calc_master_secret({3,0}, _PrfAlgo, PremasterSecret, ClientRandom, ServerRandom)
 
 calc_master_secret({3,_}, PrfAlgo, PremasterSecret, ClientRandom, ServerRandom) ->
     tls_v1:master_secret(PrfAlgo, PremasterSecret, ClientRandom, ServerRandom).
-
-handle_renegotiation_extension(Role, RecordCB, Version, Info, Random, NegotiatedCipherSuite, 
-			       ClientCipherSuites, Compression,
-			       ConnectionStates0, Renegotiation, SecureRenegotation) ->
-    case handle_renegotiation_info(RecordCB, Role, Info, ConnectionStates0,
-				   Renegotiation, SecureRenegotation,
-				   ClientCipherSuites) of
-	{ok, ConnectionStates} ->
-	    hello_pending_connection_states(RecordCB, Role,
-					    Version,
-					    NegotiatedCipherSuite,
-					    Random,
-					    Compression,
-					    ConnectionStates);
-	#alert{} = Alert ->
-	    throw(Alert)
-    end.
-
+	
 %% Update pending connection states with parameters exchanged via
 %% hello messages
 %% NOTE : Role is the role of the receiver of the hello message
@@ -1820,7 +1534,43 @@ hello_security_parameters(server, Version, #{security_parameters := SecParams},
       compression_algorithm = Compression
      }.
 
-%%-------------Encode/Decode --------------------------------
+select_compression(_CompressionMetodes) ->
+    ?NULL.
+
+do_select_version(_, ClientVersion, []) ->
+    ClientVersion;
+do_select_version(RecordCB, ClientVersion, [Version | Versions]) ->
+    case RecordCB:is_higher(Version, ClientVersion) of
+	true ->
+	    %% Version too high for client - keep looking
+	    do_select_version(RecordCB, ClientVersion, Versions);
+	false ->
+	    %% Version ok for client - look for a higher
+	    do_select_version(RecordCB, ClientVersion, Versions, Version)
+    end.
+%%
+do_select_version(_, _, [], GoodVersion) ->
+    GoodVersion;
+do_select_version(
+  RecordCB, ClientVersion, [Version | Versions], GoodVersion) ->
+    BetterVersion =
+	case RecordCB:is_higher(Version, ClientVersion) of
+	    true ->
+		%% Version too high for client
+		GoodVersion;
+	    false ->
+		%% Version ok for client
+		case RecordCB:is_higher(Version, GoodVersion) of
+		    true ->
+			%% Use higher version
+			Version;
+		    false ->
+			GoodVersion
+		end
+	end,
+    do_select_version(RecordCB, ClientVersion, Versions, BetterVersion).
+
+%%-------------Encode handshakes --------------------------------
 
 encode_server_key(#server_dh_params{dh_p = P, dh_g = G, dh_y = Y}) ->
     PLen = byte_size(P),
@@ -1926,6 +1676,126 @@ encode_protocol(Protocol, Acc) ->
 	Len = byte_size(Protocol),
 	<<Acc/binary, ?BYTE(Len), Protocol/binary>>.
 
+enc_server_key_exchange(Version, Params, {HashAlgo, SignAlgo},
+			ClientRandom, ServerRandom, PrivateKey) ->
+    EncParams = encode_server_key(Params),
+    case HashAlgo of
+	null ->
+	    #server_key_params{params = Params,
+			       params_bin = EncParams,
+			       hashsign = {null, anon},
+			       signature = <<>>};
+	_ ->
+	    Hash =
+		server_key_exchange_hash(HashAlgo, <<ClientRandom/binary,
+						     ServerRandom/binary,
+						     EncParams/binary>>),
+	    Signature = digitally_signed(Version, Hash, HashAlgo, PrivateKey),
+	    #server_key_params{params = Params,
+			       params_bin = EncParams,
+			       hashsign = {HashAlgo, SignAlgo},
+			       signature = Signature}
+    end.
+
+%% While the RFC opens the door to allow ALPN during renegotiation, in practice
+%% this does not work and it is recommended to ignore any ALPN extension during
+%% renegotiation, as done here.
+encode_alpn(_, true) ->
+    undefined;
+encode_alpn(undefined, _) ->
+    undefined;
+encode_alpn(Protocols, _) ->
+    #alpn{extension_data = lists:foldl(fun encode_protocol/2, <<>>, Protocols)}.
+
+hello_extensions_list(#hello_extensions{renegotiation_info = RenegotiationInfo,
+					srp = SRP,
+					signature_algs = HashSigns,
+					ec_point_formats = EcPointFormats,
+					elliptic_curves = EllipticCurves,
+                                        alpn = ALPN,
+					next_protocol_negotiation = NextProtocolNegotiation,
+					sni = Sni}) ->
+    [Ext || Ext <- [RenegotiationInfo, SRP, HashSigns,
+		    EcPointFormats, EllipticCurves, ALPN, NextProtocolNegotiation, Sni], Ext =/= undefined].
+
+%%-------------Decode handshakes---------------------------------
+dec_server_key(<<?UINT16(PLen), P:PLen/binary,
+		 ?UINT16(GLen), G:GLen/binary,
+		 ?UINT16(YLen), Y:YLen/binary, _/binary>> = KeyStruct,
+	       ?KEY_EXCHANGE_DIFFIE_HELLMAN, Version) ->
+    Params = #server_dh_params{dh_p = P, dh_g = G, dh_y = Y},
+    {BinMsg, HashSign, Signature} = dec_server_key_params(PLen + GLen + YLen + 6, KeyStruct, Version),
+    #server_key_params{params = Params,
+		       params_bin = BinMsg,
+		       hashsign = HashSign,
+		       signature = Signature};
+%% ECParameters with named_curve
+%% TODO: explicit curve
+dec_server_key(<<?BYTE(?NAMED_CURVE), ?UINT16(CurveID),
+		 ?BYTE(PointLen), ECPoint:PointLen/binary,
+		 _/binary>> = KeyStruct,
+	       ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN, Version) ->
+    Params = #server_ecdh_params{curve = {namedCurve, tls_v1:enum_to_oid(CurveID)},
+				 public = ECPoint},
+    {BinMsg, HashSign, Signature} = dec_server_key_params(PointLen + 4, KeyStruct, Version),
+    #server_key_params{params = Params,
+		       params_bin = BinMsg,
+		       hashsign = HashSign,
+		       signature = Signature};
+dec_server_key(<<?UINT16(Len), PskIdentityHint:Len/binary, _/binary>> = KeyStruct,
+	       KeyExchange, Version)
+  when KeyExchange == ?KEY_EXCHANGE_PSK; KeyExchange == ?KEY_EXCHANGE_RSA_PSK ->
+    Params = #server_psk_params{
+		hint = PskIdentityHint},
+    {BinMsg, HashSign, Signature} = dec_server_key_params(Len + 2, KeyStruct, Version),
+    #server_key_params{params = Params,
+		       params_bin = BinMsg,
+		       hashsign = HashSign,
+		       signature = Signature};
+dec_server_key(<<?UINT16(Len), IdentityHint:Len/binary,
+		 ?UINT16(PLen), P:PLen/binary,
+		 ?UINT16(GLen), G:GLen/binary,
+		 ?UINT16(YLen), Y:YLen/binary, _/binary>> = KeyStruct,
+	       ?KEY_EXCHANGE_DHE_PSK, Version) ->
+    DHParams = #server_dh_params{dh_p = P, dh_g = G, dh_y = Y},
+    Params = #server_dhe_psk_params{
+      hint = IdentityHint,
+      dh_params = DHParams},
+    {BinMsg, HashSign, Signature} = dec_server_key_params(Len + PLen + GLen + YLen + 8, KeyStruct, Version),
+    #server_key_params{params = Params,
+		       params_bin = BinMsg,
+		       hashsign = HashSign,
+		       signature = Signature};
+dec_server_key(<<?UINT16(Len), IdentityHint:Len/binary,
+		 ?BYTE(?NAMED_CURVE), ?UINT16(CurveID),
+		 ?BYTE(PointLen), ECPoint:PointLen/binary,
+		 _/binary>> = KeyStruct,
+	       ?KEY_EXCHANGE_EC_DIFFIE_HELLMAN_PSK, Version) ->
+    DHParams = #server_ecdh_params{
+                  curve = {namedCurve, tls_v1:enum_to_oid(CurveID)},
+                  public = ECPoint},
+    Params = #server_ecdhe_psk_params{
+                hint = IdentityHint,
+                dh_params = DHParams},
+    {BinMsg, HashSign, Signature} = dec_server_key_params(Len + 2 + PointLen + 4, KeyStruct, Version),
+    #server_key_params{params = Params,
+		       params_bin = BinMsg,
+		       hashsign = HashSign,
+		       signature = Signature};
+dec_server_key(<<?UINT16(NLen), N:NLen/binary,
+		 ?UINT16(GLen), G:GLen/binary,
+		 ?BYTE(SLen), S:SLen/binary,
+		 ?UINT16(BLen), B:BLen/binary, _/binary>> = KeyStruct,
+	       ?KEY_EXCHANGE_SRP, Version) ->
+    Params = #server_srp_params{srp_n = N, srp_g = G, srp_s = S, srp_b = B},
+    {BinMsg, HashSign, Signature} = dec_server_key_params(NLen + GLen + SLen + BLen + 7, KeyStruct, Version),
+    #server_key_params{params = Params,
+		       params_bin = BinMsg,
+		       hashsign = HashSign,
+		       signature = Signature};
+dec_server_key(_, KeyExchange, _) ->
+    throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, {unknown_or_malformed_key_exchange, KeyExchange})).
+
 dec_client_key(PKEPMS, ?KEY_EXCHANGE_RSA, {3, 0}) ->
     #encrypted_premaster_secret{premaster_secret = PKEPMS};
 dec_client_key(<<?UINT16(_), PKEPMS/binary>>, ?KEY_EXCHANGE_RSA, _) ->
@@ -2071,6 +1941,11 @@ dec_sni(<<?BYTE(?SNI_NAMETYPE_HOST_NAME), ?UINT16(Len),
 dec_sni(<<?BYTE(_), ?UINT16(Len), _:Len, Rest/binary>>) -> dec_sni(Rest);
 dec_sni(_) -> undefined.
 
+decode_alpn(undefined) ->
+    undefined;
+decode_alpn(#alpn{extension_data=Data}) ->
+    decode_protocols(Data, []).
+
 decode_next_protocols({next_protocol_negotiation, Protocols}) ->
     decode_protocols(Protocols, []).
 
@@ -2115,6 +1990,7 @@ from_2bytes(<<>>, Acc) ->
     lists:reverse(Acc);
 from_2bytes(<<?UINT16(N), Rest/binary>>, Acc) ->
     from_2bytes(Rest, [?uint16(N) | Acc]).
+
 key_exchange_alg(rsa) ->
     ?KEY_EXCHANGE_RSA;
 key_exchange_alg(Alg) when Alg == dhe_rsa; Alg == dhe_dss;
@@ -2138,8 +2014,123 @@ key_exchange_alg(Alg)
 key_exchange_alg(_) ->
     ?NULL.
 
+%%-------------Cipher suite handling -----------------------------
+select_cipher_suite(CipherSuites, Suites, false) ->
+    select_cipher_suite(CipherSuites, Suites);
+select_cipher_suite(CipherSuites, Suites, true) ->
+    select_cipher_suite(Suites, CipherSuites).
+
+select_cipher_suite([], _) ->
+   no_suite;
+select_cipher_suite([Suite | ClientSuites], SupportedSuites) ->
+    case is_member(Suite, SupportedSuites) of
+	true ->
+	    Suite;
+        false ->
+	    select_cipher_suite(ClientSuites, SupportedSuites)
+    end.
+
+is_member(Suite, SupportedSuites) ->
+    lists:member(Suite, SupportedSuites).
+
+psk_secret(PSKIdentity, PSKLookup) ->
+    case handle_psk_identity(PSKIdentity, PSKLookup) of
+	{ok, PSK} when is_binary(PSK) ->
+	    Len = erlang:byte_size(PSK),
+	    <<?UINT16(Len), 0:(Len*8), ?UINT16(Len), PSK/binary>>;
+	#alert{} = Alert ->
+	    Alert;
+	_ ->
+	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
+    end.
+
+psk_secret(PSKIdentity, PSKLookup, PremasterSecret) ->
+    case handle_psk_identity(PSKIdentity, PSKLookup) of
+	{ok, PSK} when is_binary(PSK) ->
+	    Len = erlang:byte_size(PremasterSecret),
+	    PSKLen = erlang:byte_size(PSK),
+	    <<?UINT16(Len), PremasterSecret/binary, ?UINT16(PSKLen), PSK/binary>>;
+	#alert{} = Alert ->
+	    Alert;
+	_ ->
+	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
+    end.
+
+handle_psk_identity(_PSKIdentity, LookupFun)
+  when LookupFun == undefined ->
+    error;
+handle_psk_identity(PSKIdentity, {Fun, UserState}) ->
+    Fun(psk, PSKIdentity, UserState).
+
+filter_hashsigns([], [], _, Acc) ->
+    lists:reverse(Acc);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns,
+		 Acc) when KeyExchange == dhe_ecdsa;
+			   KeyExchange == ecdhe_ecdsa ->
+    do_filter_hashsigns(ecdsa, Suite, Suites, Algos, HashSigns, Acc);
+
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns,
+		 Acc) when KeyExchange == rsa;
+			   KeyExchange == dhe_rsa;
+			   KeyExchange == ecdhe_rsa;
+			   KeyExchange == srp_rsa;
+			   KeyExchange == rsa_psk ->
+    do_filter_hashsigns(rsa, Suite, Suites, Algos, HashSigns, Acc);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Acc) when 
+      KeyExchange == dhe_dss;
+      KeyExchange == srp_dss ->							       
+    do_filter_hashsigns(dsa, Suite, Suites, Algos, HashSigns, Acc);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Acc) when 
+      KeyExchange == dh_dss; 
+      KeyExchange == dh_rsa; 
+      KeyExchange == dh_ecdsa;
+      KeyExchange == ecdh_rsa;    
+      KeyExchange == ecdh_ecdsa ->
+      %%  Fixed DH certificates MAY be signed with any hash/signature
+      %%  algorithm pair appearing in the hash_sign extension.  The names
+    %%  DH_DSS, DH_RSA, ECDH_ECDSA, and ECDH_RSA are historical.
+    filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]);
+filter_hashsigns([Suite | Suites], [#{key_exchange := KeyExchange} | Algos], HashSigns, Acc) when 
+      KeyExchange == dh_anon;
+      KeyExchange == ecdh_anon;
+      KeyExchange == srp_anon;
+      KeyExchange == psk;
+      KeyExchange == dhe_psk;
+      KeyExchange == ecdhe_psk ->
+    %% In this case hashsigns is not used as the kexchange is anonaymous
+    filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]).
+
+do_filter_hashsigns(SignAlgo, Suite, Suites, Algos, HashSigns, Acc) ->
+    case lists:keymember(SignAlgo, 2, HashSigns) of
+	true ->
+	    filter_hashsigns(Suites, Algos, HashSigns, [Suite| Acc]);
+	false ->
+	    filter_hashsigns(Suites, Algos, HashSigns, Acc)
+    end.
+
+unavailable_ecc_suites(no_curve) ->
+    ssl_cipher:ec_keyed_suites();
+unavailable_ecc_suites(_) ->
+    [].
 %%-------------Extension handling --------------------------------
 
+handle_renegotiation_extension(Role, RecordCB, Version, Info, Random, NegotiatedCipherSuite, 
+			       ClientCipherSuites, Compression,
+			       ConnectionStates0, Renegotiation, SecureRenegotation) ->
+    case handle_renegotiation_info(RecordCB, Role, Info, ConnectionStates0,
+				   Renegotiation, SecureRenegotation,
+				   ClientCipherSuites) of
+	{ok, ConnectionStates} ->
+	    hello_pending_connection_states(RecordCB, Role,
+					    Version,
+					    NegotiatedCipherSuite,
+					    Random,
+					    Compression,
+					    ConnectionStates);
+	#alert{} = Alert ->
+	    throw(Alert)
+    end.
+
 %% Receive protocols, choose one from the list, return it.
 handle_alpn_extension(_, {error, Reason}) ->
     ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, Reason);
@@ -2202,150 +2193,6 @@ handle_srp_extension(undefined, Session) ->
 handle_srp_extension(#srp{username = Username}, Session) ->
     Session#session{srp_username = Username}.
 
-%%-------------Misc --------------------------------
-
-select_cipher_suite(CipherSuites, Suites, false) ->
-    select_cipher_suite(CipherSuites, Suites);
-select_cipher_suite(CipherSuites, Suites, true) ->
-    select_cipher_suite(Suites, CipherSuites).
-
-select_cipher_suite([], _) ->
-   no_suite;
-select_cipher_suite([Suite | ClientSuites], SupportedSuites) ->
-    case is_member(Suite, SupportedSuites) of
-	true ->
-	    Suite;
-        false ->
-	    select_cipher_suite(ClientSuites, SupportedSuites)
-    end.
-
-int_to_bin(I) ->
-    L = (length(integer_to_list(I, 16)) + 1) div 2,
-    <<I:(L*8)>>.
-
-is_member(Suite, SupportedSuites) ->
-    lists:member(Suite, SupportedSuites).
-
-select_compression(_CompressionMetodes) ->
-    ?NULL.
-
-available_signature_algs(undefined, _)  ->
-    undefined;
-available_signature_algs(SupportedHashSigns, Version) when Version >= {3, 3} ->
-    #hash_sign_algos{hash_sign_algos = SupportedHashSigns};
-available_signature_algs(_, _) ->
-    undefined.
-
-psk_secret(PSKIdentity, PSKLookup) ->
-    case handle_psk_identity(PSKIdentity, PSKLookup) of
-	{ok, PSK} when is_binary(PSK) ->
-	    Len = erlang:byte_size(PSK),
-	    <<?UINT16(Len), 0:(Len*8), ?UINT16(Len), PSK/binary>>;
-	#alert{} = Alert ->
-	    Alert;
-	_ ->
-	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
-    end.
-
-psk_secret(PSKIdentity, PSKLookup, PremasterSecret) ->
-    case handle_psk_identity(PSKIdentity, PSKLookup) of
-	{ok, PSK} when is_binary(PSK) ->
-	    Len = erlang:byte_size(PremasterSecret),
-	    PSKLen = erlang:byte_size(PSK),
-	    <<?UINT16(Len), PremasterSecret/binary, ?UINT16(PSKLen), PSK/binary>>;
-	#alert{} = Alert ->
-	    Alert;
-	_ ->
-	    throw(?ALERT_REC(?FATAL, ?ILLEGAL_PARAMETER))
-    end.
-
-handle_psk_identity(_PSKIdentity, LookupFun)
-  when LookupFun == undefined ->
-    error;
-handle_psk_identity(PSKIdentity, {Fun, UserState}) ->
-    Fun(psk, PSKIdentity, UserState).
-
-crl_check(_, false, _,_,_, _, _) ->
-    valid;
-crl_check(_, peer, _, _,_, valid, _) -> %% Do not check CAs with this option.
-    valid;
-crl_check(OtpCert, Check, CertDbHandle, CertDbRef, {Callback, CRLDbHandle}, _, CertPath) ->
-    Options = [{issuer_fun, {fun(_DP, CRL, Issuer, DBInfo) ->
-				     ssl_crl:trusted_cert_and_path(CRL, Issuer, {CertPath,
-                                                                                 DBInfo})
-			     end, {CertDbHandle, CertDbRef}}}, 
-	       {update_crl, fun(DP, CRL) -> Callback:fresh_crl(DP, CRL) end},
-               {undetermined_details, true}
-	      ],
-    case dps_and_crls(OtpCert, Callback, CRLDbHandle, ext) of
-	no_dps ->
-	    crl_check_same_issuer(OtpCert, Check,
-				  dps_and_crls(OtpCert, Callback, CRLDbHandle, same_issuer),
-				  Options);
-	DpsAndCRLs ->  %% This DP list may be empty if relevant CRLs existed 
-	    %% but could not be retrived, will result in {bad_cert, revocation_status_undetermined}
-	    case public_key:pkix_crls_validate(OtpCert, DpsAndCRLs, Options) of
-		{bad_cert, {revocation_status_undetermined, _}} ->
-		    crl_check_same_issuer(OtpCert, Check, dps_and_crls(OtpCert, Callback, 
-								       CRLDbHandle, same_issuer), Options);
-		Other ->
-		    Other
-	    end
-    end.
-
-crl_check_same_issuer(OtpCert, best_effort, Dps, Options) ->		
-    case public_key:pkix_crls_validate(OtpCert, Dps, Options) of 
-	{bad_cert, {revocation_status_undetermined, _}}   ->
-	    valid;
-	Other ->
-	    Other
-    end;
-crl_check_same_issuer(OtpCert, _, Dps, Options) ->    
-    public_key:pkix_crls_validate(OtpCert, Dps, Options).
-
-dps_and_crls(OtpCert, Callback, CRLDbHandle, ext) ->
-    case public_key:pkix_dist_points(OtpCert) of
-	[] ->
-	    no_dps;
-	DistPoints ->
-	    Issuer = OtpCert#'OTPCertificate'.tbsCertificate#'OTPTBSCertificate'.issuer,
-	    CRLs = distpoints_lookup(DistPoints, Issuer, Callback, CRLDbHandle),
-            dps_and_crls(DistPoints, CRLs, [])
-    end;
-
-dps_and_crls(OtpCert, Callback, CRLDbHandle, same_issuer) ->    
-    DP = #'DistributionPoint'{distributionPoint = {fullName, GenNames}} = 
-	public_key:pkix_dist_point(OtpCert),
-    CRLs = lists:flatmap(fun({directoryName, Issuer}) -> 
-				 Callback:select(Issuer, CRLDbHandle);
-			    (_) ->
-				 []
-			 end, GenNames),
-    [{DP, {CRL, public_key:der_decode('CertificateList', CRL)}} ||  CRL <- CRLs].
-
-dps_and_crls([], _, Acc) ->
-    Acc;
-dps_and_crls([DP | Rest], CRLs, Acc) ->
-    DpCRL = [{DP, {CRL, public_key:der_decode('CertificateList', CRL)}} ||  CRL <- CRLs],
-    dps_and_crls(Rest, CRLs, DpCRL ++ Acc).
-    
-distpoints_lookup([],_, _, _) ->
-    [];
-distpoints_lookup([DistPoint | Rest], Issuer, Callback, CRLDbHandle) ->
-    Result =
-	try Callback:lookup(DistPoint, Issuer, CRLDbHandle)
-	catch
-	    error:undef ->
-		%% The callback module still uses the 2-argument
-		%% version of the lookup function.
-		Callback:lookup(DistPoint, CRLDbHandle)
-	end,
-    case Result of
-	not_available ->
-	    distpoints_lookup(Rest, Issuer, Callback, CRLDbHandle);
-	CRLs ->
-	    CRLs
-    end.	
 
 sign_algo(?rsaEncryption) ->
     rsa;
@@ -2396,7 +2243,6 @@ is_acceptable_hash_sign(_, _, _, KeyExAlgo, _) when
     true; 
 is_acceptable_hash_sign(_,_, _,_,_) ->
     false.					
-
 is_acceptable_hash_sign(Algos, SupportedHashSigns) ->
     lists:member(Algos, SupportedHashSigns).
 
@@ -2416,21 +2262,164 @@ sign_type(dsa) ->
 sign_type(ecdsa) ->
     ?ECDSA_SIGN.
 
+server_name(_, _, server) ->
+    undefined; %% Not interesting to check your own name.
+server_name(undefined, Host, client) ->
+    {fallback, Host}; %% Fallback to Host argument to connect
+server_name(SNI, _, client) ->
+    SNI. %% If Server Name Indication is available
 
-bad_key(#'DSAPrivateKey'{}) ->
-    unacceptable_dsa_key;
-bad_key(#'RSAPrivateKey'{}) ->
-    unacceptable_rsa_key;
-bad_key(#'ECPrivateKey'{}) ->
-    unacceptable_ecdsa_key.
+client_ecc_extensions(SupportedECCs) ->
+    CryptoSupport = proplists:get_value(public_keys, crypto:supports()),
+    case proplists:get_bool(ecdh, CryptoSupport) of
+	true ->
+	    EcPointFormats = #ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]},
+	    EllipticCurves = SupportedECCs,
+	    {EcPointFormats, EllipticCurves};
+	_ ->
+	    {undefined, undefined}
+    end.
 
-available_signature_algs(undefined, SupportedHashSigns, _, Version) when 
-      Version >= {3,3} ->
-    SupportedHashSigns;
-available_signature_algs(#hash_sign_algos{hash_sign_algos = ClientHashSigns}, SupportedHashSigns, 
-                         _, Version) when Version >= {3,3} ->
-    sets:to_list(sets:intersection(sets:from_list(ClientHashSigns), 
-				   sets:from_list(SupportedHashSigns)));
-available_signature_algs(_, _, _, _) -> 
-    undefined.
+server_ecc_extension(_Version, EcPointFormats) ->
+    CryptoSupport = proplists:get_value(public_keys, crypto:supports()),
+    case proplists:get_bool(ecdh, CryptoSupport) of
+	true ->
+	    handle_ecc_point_fmt_extension(EcPointFormats);
+	false ->
+	    undefined
+    end.
+
+handle_ecc_point_fmt_extension(undefined) ->
+    undefined;
+handle_ecc_point_fmt_extension(_) ->
+    #ec_point_formats{ec_point_format_list = [?ECPOINT_UNCOMPRESSED]}.
+
+advertises_ec_ciphers([]) ->
+    false;
+advertises_ec_ciphers([#{key_exchange := ecdh_ecdsa} | _]) ->
+    true;
+advertises_ec_ciphers([#{key_exchange := ecdhe_ecdsa} | _]) ->
+    true;
+advertises_ec_ciphers([#{key_exchange := ecdh_rsa} | _]) ->
+    true;
+advertises_ec_ciphers([#{key_exchange := ecdhe_rsa} | _]) ->
+    true;
+advertises_ec_ciphers([#{key_exchange := ecdh_anon} | _]) ->
+    true;
+advertises_ec_ciphers([{ecdhe_psk, _,_,_} | _]) ->
+    true;
+advertises_ec_ciphers([_| Rest]) ->
+    advertises_ec_ciphers(Rest).
+
+select_shared_curve([], _) ->
+    no_curve;
+select_shared_curve([Curve | Rest], Curves) ->
+    case lists:member(Curve, Curves) of
+	true ->
+	    {namedCurve, Curve};
+	false ->
+	    select_shared_curve(Rest, Curves)
+    end.
+
+sni(undefined) ->
+    undefined;
+sni(disable) ->
+    undefined;
+sni(Hostname) ->
+    #sni{hostname = Hostname}.
 
+renegotiation_info(_, client, _, false) ->
+    #renegotiation_info{renegotiated_connection = undefined};
+renegotiation_info(_RecordCB, server, ConnectionStates, false) ->
+    ConnectionState  = ssl_record:current_connection_state(ConnectionStates, read),
+    case maps:get(secure_renegotiation, ConnectionState) of
+	true ->
+	    #renegotiation_info{renegotiated_connection = ?byte(0)};
+	false ->
+	    #renegotiation_info{renegotiated_connection = undefined}
+    end;
+renegotiation_info(_RecordCB, client, ConnectionStates, true) ->
+    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
+    case  maps:get(secure_renegotiation, ConnectionState) of
+	true ->
+	    Data = maps:get(client_verify_data, ConnectionState),
+	    #renegotiation_info{renegotiated_connection = Data};
+	false ->
+	    #renegotiation_info{renegotiated_connection = undefined}
+    end;
+
+renegotiation_info(_RecordCB, server, ConnectionStates, true) ->
+    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
+    case maps:get(secure_renegotiation, ConnectionState) of
+	true ->
+	    CData = maps:get(client_verify_data, ConnectionState),
+	    SData = maps:get(server_verify_data, ConnectionState),
+	    #renegotiation_info{renegotiated_connection = <<CData/binary, SData/binary>>};
+	false ->
+	    #renegotiation_info{renegotiated_connection = undefined}
+    end.
+
+handle_renegotiation_info(_RecordCB, _, #renegotiation_info{renegotiated_connection = ?byte(0)},
+			  ConnectionStates, false, _, _) ->
+    {ok, ssl_record:set_renegotiation_flag(true, ConnectionStates)};
+
+handle_renegotiation_info(_RecordCB, server, undefined, ConnectionStates, _, _, CipherSuites) ->
+    case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of
+	true ->
+	    {ok, ssl_record:set_renegotiation_flag(true, ConnectionStates)};
+	false ->
+	    {ok, ssl_record:set_renegotiation_flag(false, ConnectionStates)}
+    end;
+
+handle_renegotiation_info(_RecordCB, _, undefined, ConnectionStates, false, _, _) ->
+    {ok, ssl_record:set_renegotiation_flag(false, ConnectionStates)};
+
+handle_renegotiation_info(_RecordCB, client, #renegotiation_info{renegotiated_connection = ClientServerVerify},
+			  ConnectionStates, true, _, _) ->
+    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
+    CData = maps:get(client_verify_data, ConnectionState),
+    SData = maps:get(server_verify_data, ConnectionState),
+    case <<CData/binary, SData/binary>> == ClientServerVerify of
+	true ->
+	    {ok, ConnectionStates};
+	false ->
+            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, client_renegotiation)
+    end;
+handle_renegotiation_info(_RecordCB, server, #renegotiation_info{renegotiated_connection = ClientVerify},
+			  ConnectionStates, true, _, CipherSuites) ->
+
+      case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of
+	  true ->
+              ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, {server_renegotiation, empty_renegotiation_info_scsv});
+	  false ->
+	      ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
+	      Data =  maps:get(client_verify_data, ConnectionState),
+	      case Data == ClientVerify of
+		  true ->
+		      {ok, ConnectionStates};
+		  false ->
+                      ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, server_renegotiation)
+	      end
+      end;
+
+handle_renegotiation_info(RecordCB, client, undefined, ConnectionStates, true, SecureRenegotation, _) ->
+    handle_renegotiation_info(RecordCB, ConnectionStates, SecureRenegotation);
+
+handle_renegotiation_info(RecordCB, server, undefined, ConnectionStates, true, SecureRenegotation, CipherSuites) ->
+     case is_member(?TLS_EMPTY_RENEGOTIATION_INFO_SCSV, CipherSuites) of
+	  true ->
+             ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, {server_renegotiation, empty_renegotiation_info_scsv});
+	 false ->
+	     handle_renegotiation_info(RecordCB, ConnectionStates, SecureRenegotation)
+     end.
+
+handle_renegotiation_info(_RecordCB, ConnectionStates, SecureRenegotation) ->
+    ConnectionState = ssl_record:current_connection_state(ConnectionStates, read),
+    case {SecureRenegotation, maps:get(secure_renegotiation, ConnectionState)} of
+	{_, true} ->
+            ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, already_secure);
+	{true, false} ->
+	    ?ALERT_REC(?FATAL, ?NO_RENEGOTIATION);
+	{false, false} ->
+	    {ok, ConnectionStates}
+    end.
diff --git a/lib/ssl/src/ssl_internal.hrl b/lib/ssl/src/ssl_internal.hrl
index 24ac34653e..d354910f33 100644
--- a/lib/ssl/src/ssl_internal.hrl
+++ b/lib/ssl/src/ssl_internal.hrl
@@ -73,6 +73,7 @@
 %% sslv3 is considered insecure due to lack of padding check (Poodle attack)
 %% Keep as interop with legacy software but do not support as default 
 -define(ALL_AVAILABLE_VERSIONS, ['tlsv1.2', 'tlsv1.1', tlsv1, sslv3]).
+-define(ALL_AVAILABLE_DATAGRAM_VERSIONS, ['dtlsv1.2', dtlsv1]).
 -define(ALL_SUPPORTED_VERSIONS, ['tlsv1.2', 'tlsv1.1', tlsv1]).
 -define(MIN_SUPPORTED_VERSIONS, ['tlsv1.1', tlsv1]).
 -define(ALL_DATAGRAM_SUPPORTED_VERSIONS, ['dtlsv1.2', dtlsv1]).
@@ -95,7 +96,8 @@
 	  certfile             :: binary(),
 	  cert                 :: public_key:der_encoded() | secret_printout() | 'undefined',
 	  keyfile              :: binary(),
-	  key	               :: {'RSAPrivateKey' | 'DSAPrivateKey' | 'ECPrivateKey' | 'PrivateKeyInfo', public_key:der_encoded()} | secret_printout() | 'undefined',
+	  key	               :: {'RSAPrivateKey' | 'DSAPrivateKey' | 'ECPrivateKey' | 'PrivateKeyInfo', 
+                                   public_key:der_encoded()} | key_map() | secret_printout() | 'undefined',
 	  password	       :: string() | secret_printout() | 'undefined',
 	  cacerts              :: [public_key:der_encoded()] | secret_printout() | 'undefined',
 	  cacertfile           :: binary(),
@@ -142,7 +144,6 @@
 	  signature_algs,
 	  eccs,
 	  honor_ecc_order            :: boolean(),
-	  v2_hello_compatible        :: boolean(),
           max_handshake_size         :: integer()
          }).
 
@@ -164,7 +165,15 @@
 		 connection_cb
 		}).
 
-
+-type key_map()              :: #{algorithm := rsa | dss | ecdsa,
+                                  %% engine and key_id ought to 
+                                  %% be :=, but putting it in
+                                  %% the spec gives dialyzer warning
+                                  %% of correct code!
+                                  engine => crypto:engine_ref(),
+                                  key_id => crypto:key_id(),
+                                  password => crypto:password()
+                                 }.
 -type state_name()           :: hello | abbreviated | certify | cipher | connection.
 -type gen_fsm_state_return() :: {next_state, state_name(), term()} |
 				{next_state, state_name(), term(), timeout()} |
diff --git a/lib/ssl/src/ssl_record.erl b/lib/ssl/src/ssl_record.erl
index 003ad4994b..c0eee466ae 100644
--- a/lib/ssl/src/ssl_record.erl
+++ b/lib/ssl/src/ssl_record.erl
@@ -53,11 +53,11 @@
 -type ssl_atom_version() :: tls_record:tls_atom_version().
 -type connection_states() :: term(). %% Map
 -type connection_state() :: term(). %% Map
+
 %%====================================================================
-%% Internal application API
+%% Connection state handling
 %%====================================================================
 
-
 %%--------------------------------------------------------------------
 -spec current_connection_state(connection_states(), read | write) ->
 				      connection_state().
@@ -267,6 +267,9 @@ set_pending_cipher_state(#{pending_read := Read,
       pending_read => Read#{cipher_state => ServerState},
       pending_write => Write#{cipher_state => ClientState}}.
 
+%%====================================================================
+%% Compression
+%%====================================================================
 
 uncompress(?NULL, Data, CS) ->
     {Data, CS}.
@@ -282,6 +285,11 @@ compress(?NULL, Data, CS) ->
 compressions() ->
     [?byte(?NULL)].
 
+
+%%====================================================================
+%% Payload encryption/decryption
+%%====================================================================
+
 %%--------------------------------------------------------------------
 -spec cipher(ssl_version(), iodata(), connection_state(), MacHash::binary()) ->
 		    {CipherFragment::binary(), connection_state()}.
@@ -318,7 +326,7 @@ cipher_aead(Version, Fragment,
 
 %%--------------------------------------------------------------------
 -spec decipher(ssl_version(), binary(), connection_state(), boolean()) ->
-                      {binary(), binary(), connection_state} | #alert{}.
+                      {binary(), binary(), connection_state()} | #alert{}.
 %%
 %% Description: Payload decryption
 %%--------------------------------------------------------------------
diff --git a/lib/ssl/src/ssl_v2.erl b/lib/ssl/src/ssl_v2.erl
deleted file mode 100644
index 37134cbe5d..0000000000
--- a/lib/ssl/src/ssl_v2.erl
+++ /dev/null
@@ -1,38 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2007-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-%%
-
-%%
-%%----------------------------------------------------------------------
-%% Purpose: Handles sslv2 hello as clients supporting sslv2 and higher
-%% will send an sslv2 hello.
-%%----------------------------------------------------------------------
-
--module(ssl_v2).
-
--export([client_random/2]).
-
-client_random(ChallengeData, 32) ->
-    ChallengeData;
-client_random(ChallengeData, N) when N > 32 ->
-    <<NewChallengeData:32/binary, _/binary>> = ChallengeData,
-    NewChallengeData;
-client_random(ChallengeData, N) ->
-    Pad = list_to_binary(lists:duplicate(N, 0)),
-    <<Pad/binary, ChallengeData/binary>>.
diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl
index 62452808ae..c35378f18f 100644
--- a/lib/ssl/src/tls_connection.erl
+++ b/lib/ssl/src/tls_connection.erl
@@ -45,10 +45,8 @@
 %% Setup
 -export([start_fsm/8, start_link/7, init/1]).
 
--export([encode_data/3, encode_alert/3]).
-
 %% State transition handling	 
--export([next_record/1, next_event/3, next_event/4]).
+-export([next_record/1, next_event/3, next_event/4, handle_common_event/4]).
 
 %% Handshake handling
 -export([renegotiate/2, send_handshake/2, 
@@ -56,11 +54,11 @@
 	 reinit_handshake_data/1,  select_sni_extension/1, empty_connection_state/2]).
 
 %% Alert and close handling
--export([send_alert/2, close/5, protocol_name/0]).
+-export([encode_alert/3, send_alert/2, close/5, protocol_name/0]).
 
 %% Data handling
--export([passive_receive/2, next_record_if_active/1, handle_common_event/4, send/3,
-        socket/5, setopts/3, getopts/3]).
+-export([encode_data/3, passive_receive/2, next_record_if_active/1, send/3,
+         socket/5, setopts/3, getopts/3]).
 
 %% gen_statem state functions
 -export([init/3, error/3, downgrade/3, %% Initiation and take down states
@@ -72,6 +70,9 @@
 %%====================================================================
 %% Internal application API
 %%====================================================================	     
+%%====================================================================
+%% Setup
+%%====================================================================
 start_fsm(Role, Host, Port, Socket, {#ssl_options{erl_dist = false},_, Tracker} = Opts,
 	  User, {CbModule, _,_, _} = CbInfo, 
 	  Timeout) -> 
@@ -100,16 +101,174 @@ start_fsm(Role, Host, Port, Socket, {#ssl_options{erl_dist = true},_, Tracker} =
 	    Error
     end.
 
+%%--------------------------------------------------------------------
+-spec start_link(atom(), host(), inet:port_number(), port(), list(), pid(), tuple()) ->
+    {ok, pid()} | ignore |  {error, reason()}.
+%%
+%% Description: Creates a gen_statem process which calls Module:init/1 to
+%% initialize. 
+%%--------------------------------------------------------------------
+start_link(Role, Host, Port, Socket, Options, User, CbInfo) ->
+    {ok, proc_lib:spawn_link(?MODULE, init, [[Role, Host, Port, Socket, Options, User, CbInfo]])}.
+
+init([Role, Host, Port, Socket, Options,  User, CbInfo]) ->
+    process_flag(trap_exit, true),
+    State0 = initial_state(Role, Host, Port, Socket, Options, User, CbInfo),
+    try 
+	State = ssl_connection:ssl_config(State0#state.ssl_options, Role, State0),
+	gen_statem:enter_loop(?MODULE, [], init, State)
+    catch throw:Error ->
+	gen_statem:enter_loop(?MODULE, [], error, {Error, State0}) 
+    end.
+%%====================================================================
+%% State transition handling
+%%====================================================================
+next_record(#state{unprocessed_handshake_events = N} = State) when N > 0 ->
+    {no_record, State#state{unprocessed_handshake_events = N-1}};
+					 
+next_record(#state{protocol_buffers =
+		       #protocol_buffers{tls_packets = [], tls_cipher_texts = [CT | Rest]}
+		   = Buffers,
+		   connection_states = ConnStates0,
+		   ssl_options = #ssl_options{padding_check = Check}} = State) ->
+    case tls_record:decode_cipher_text(CT, ConnStates0, Check) of
+	{Plain, ConnStates} ->		      
+	    {Plain, State#state{protocol_buffers =
+				    Buffers#protocol_buffers{tls_cipher_texts = Rest},
+				connection_states = ConnStates}};
+	#alert{} = Alert ->
+	    {Alert, State}
+    end;
+next_record(#state{protocol_buffers = #protocol_buffers{tls_packets = [], tls_cipher_texts = []},
+		   socket = Socket,
+                   close_tag = CloseTag,
+		   transport_cb = Transport} = State) ->
+    case tls_socket:setopts(Transport, Socket, [{active,once}]) of
+	ok ->
+	    {no_record, State};
+	_ ->
+            self() ! {CloseTag, Socket},
+	    {no_record, State}
+    end;
+next_record(State) ->
+    {no_record, State}.
+
+next_event(StateName, Record, State) ->
+    next_event(StateName, Record, State, []).
+
+next_event(connection = StateName, no_record, State0, Actions) ->
+    case next_record_if_active(State0) of
+	{no_record, State} ->
+	    ssl_connection:hibernate_after(StateName, State, Actions);
+	{#ssl_tls{} = Record, State} ->
+	    {next_state, StateName, State, [{next_event, internal, {protocol_record, Record}} | Actions]};
+	{#alert{} = Alert, State} ->
+	    {next_state, StateName, State, [{next_event, internal, Alert} | Actions]}
+    end;
+next_event(StateName, Record, State, Actions) ->
+    case Record of
+	no_record ->
+	    {next_state, StateName, State, Actions};
+	#ssl_tls{} = Record ->
+	    {next_state, StateName, State, [{next_event, internal, {protocol_record, Record}} | Actions]};
+	#alert{} = Alert ->
+	    {next_state, StateName, State, [{next_event, internal, Alert} | Actions]}
+    end.
+
+handle_common_event(internal, #alert{} = Alert, StateName, 
+		    #state{negotiated_version = Version} = State) ->
+    ssl_connection:handle_own_alert(Alert, Version, StateName, State);
+%%% TLS record protocol level handshake messages 
+handle_common_event(internal,  #ssl_tls{type = ?HANDSHAKE, fragment = Data}, 
+		    StateName, #state{protocol_buffers =
+					  #protocol_buffers{tls_handshake_buffer = Buf0} = Buffers,
+				      negotiated_version = Version,
+				      ssl_options = Options} = State0) ->
+    try
+	{Packets, Buf} = tls_handshake:get_tls_handshake(Version,Data,Buf0, Options),
+	State1 =
+	    State0#state{protocol_buffers =
+			     Buffers#protocol_buffers{tls_handshake_buffer = Buf}},
+	case Packets of
+            [] -> 
+                assert_buffer_sanity(Buf, Options),
+                {Record, State} = next_record(State1),
+                next_event(StateName, Record, State);
+            _ ->                
+                Events = tls_handshake_events(Packets),
+                case StateName of
+                    connection ->
+                        ssl_connection:hibernate_after(StateName, State1, Events);
+                    _ ->
+                        {next_state, StateName, 
+                         State1#state{unprocessed_handshake_events = unprocessed_events(Events)}, Events}
+                end
+        end
+    catch throw:#alert{} = Alert ->
+            ssl_connection:handle_own_alert(Alert, Version, StateName, State0)
+    end;
+%%% TLS record protocol level application data messages 
+handle_common_event(internal, #ssl_tls{type = ?APPLICATION_DATA, fragment = Data}, StateName, State) ->
+    {next_state, StateName, State, [{next_event, internal, {application_data, Data}}]};
+%%% TLS record protocol level change cipher messages
+handle_common_event(internal, #ssl_tls{type = ?CHANGE_CIPHER_SPEC, fragment = Data}, StateName, State) ->
+    {next_state, StateName, State, [{next_event, internal, #change_cipher_spec{type = Data}}]};
+%%% TLS record protocol level Alert messages
+handle_common_event(internal, #ssl_tls{type = ?ALERT, fragment = EncAlerts}, StateName,
+		    #state{negotiated_version = Version} = State) ->
+    try decode_alerts(EncAlerts) of	
+	Alerts = [_|_] ->
+	    handle_alerts(Alerts,  {next_state, StateName, State});
+	[] ->
+	    ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, empty_alert), 
+					    Version, StateName, State);
+	#alert{} = Alert ->
+	    ssl_connection:handle_own_alert(Alert, Version, StateName, State)
+    catch
+	_:_ ->
+	    ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, alert_decode_error),
+					    Version, StateName, State)  
+
+    end;
+%% Ignore unknown TLS record level protocol messages
+handle_common_event(internal, #ssl_tls{type = _Unknown}, StateName, State) ->
+    {next_state, StateName, State}.
+%%====================================================================
+%% Handshake handling
+%%====================================================================
+renegotiate(#state{role = client} = State, Actions) ->
+    %% Handle same way as if server requested
+    %% the renegotiation
+    Hs0 = ssl_handshake:init_handshake_history(),
+    {next_state, connection, State#state{tls_handshake_history = Hs0}, 
+     [{next_event, internal, #hello_request{}} | Actions]};
+
+renegotiate(#state{role = server,
+		   socket = Socket,
+		   transport_cb = Transport,
+		   negotiated_version = Version,
+		   connection_states = ConnectionStates0} = State0, Actions) ->
+    HelloRequest = ssl_handshake:hello_request(),
+    Frag = tls_handshake:encode_handshake(HelloRequest, Version),
+    Hs0 = ssl_handshake:init_handshake_history(),
+    {BinMsg, ConnectionStates} = 
+	tls_record:encode_handshake(Frag, Version, ConnectionStates0),
+    send(Transport, Socket, BinMsg),
+    State1 = State0#state{connection_states = 
+			     ConnectionStates,
+			 tls_handshake_history = Hs0},
+    {Record, State} = next_record(State1),
+    next_event(hello, Record, State, Actions).
+	     
 send_handshake(Handshake, State) ->
     send_handshake_flight(queue_handshake(Handshake, State)).
 
 queue_handshake(Handshake, #state{negotiated_version = Version,
 				  tls_handshake_history = Hist0,
 				  flight_buffer = Flight0,
-				  ssl_options = #ssl_options{v2_hello_compatible = V2HComp},				  
 				  connection_states = ConnectionStates0} = State0) ->
     {BinHandshake, ConnectionStates, Hist} =
-	encode_handshake(Handshake, Version, ConnectionStates0, Hist0, V2HComp),
+	encode_handshake(Handshake, Version, ConnectionStates0, Hist0),
     State0#state{connection_states = ConnectionStates,
 		 tls_handshake_history = Hist,
 		 flight_buffer = Flight0 ++ [BinHandshake]}.
@@ -128,15 +287,6 @@ queue_change_cipher(Msg, #state{negotiated_version = Version,
     State0#state{connection_states = ConnectionStates,
 		 flight_buffer = Flight0 ++ [BinChangeCipher]}.
 
-send_alert(Alert, #state{negotiated_version = Version,
-			 socket = Socket,
-			 transport_cb = Transport,
-			 connection_states = ConnectionStates0} = State0) ->
-    {BinMsg, ConnectionStates} =
-	encode_alert(Alert, Version, ConnectionStates0),
-    send(Transport, Socket, BinMsg),
-    State0#state{connection_states = ConnectionStates}.
-
 reinit_handshake_data(State) ->
     %% premaster_secret, public_key_info and tls_handshake_info 
     %% are only needed during the handshake phase. 
@@ -155,8 +305,17 @@ select_sni_extension(_) ->
 empty_connection_state(ConnectionEnd, BeastMitigation) ->
     ssl_record:empty_connection_state(ConnectionEnd, BeastMitigation).
 
-encode_data(Data, Version, ConnectionStates0)->
-    tls_record:encode_data(Data, Version, ConnectionStates0).
+%%====================================================================
+%% Alert and close handling
+%%====================================================================	     
+send_alert(Alert, #state{negotiated_version = Version,
+			 socket = Socket,
+			 transport_cb = Transport,
+			 connection_states = ConnectionStates0} = State0) ->
+    {BinMsg, ConnectionStates} =
+	encode_alert(Alert, Version, ConnectionStates0),
+    send(Transport, Socket, BinMsg),
+    State0#state{connection_states = ConnectionStates}.
 
 %%--------------------------------------------------------------------
 -spec encode_alert(#alert{}, ssl_record:ssl_version(), ssl_record:connection_states()) -> 
@@ -166,42 +325,66 @@ encode_data(Data, Version, ConnectionStates0)->
 %%--------------------------------------------------------------------
 encode_alert(#alert{} = Alert, Version, ConnectionStates) ->
     tls_record:encode_alert_record(Alert, Version, ConnectionStates).
-
+%% User closes or recursive call!
+close({close, Timeout}, Socket, Transport = gen_tcp, _,_) ->
+    tls_socket:setopts(Transport, Socket, [{active, false}]),
+    Transport:shutdown(Socket, write),
+    _ = Transport:recv(Socket, 0, Timeout),
+    ok;
+%% Peer closed socket
+close({shutdown, transport_closed}, Socket, Transport = gen_tcp, ConnectionStates, Check) ->
+    close({close, 0}, Socket, Transport, ConnectionStates, Check);
+%% We generate fatal alert
+close({shutdown, own_alert}, Socket, Transport = gen_tcp, ConnectionStates, Check) ->
+    %% Standard trick to try to make sure all
+    %% data sent to the tcp port is really delivered to the
+    %% peer application before tcp port is closed so that the peer will
+    %% get the correct TLS alert message and not only a transport close.
+    %% Will return when other side has closed or after timout millisec
+    %% e.g. we do not want to hang if something goes wrong
+    %% with the network but we want to maximise the odds that
+    %% peer application gets all data sent on the tcp connection.
+    close({close, ?DEFAULT_TIMEOUT}, Socket, Transport, ConnectionStates, Check);
+close(downgrade, _,_,_,_) ->
+    ok;
+%% Other
+close(_, Socket, Transport, _,_) -> 
+    Transport:close(Socket).
 protocol_name() ->
     "TLS".
-%%====================================================================
-%% tls_connection_sup API
-%%====================================================================
 
-%%--------------------------------------------------------------------
--spec start_link(atom(), host(), inet:port_number(), port(), list(), pid(), tuple()) ->
-    {ok, pid()} | ignore |  {error, reason()}.
-%%
-%% Description: Creates a gen_fsm process which calls Module:init/1 to
-%% initialize. To ensure a synchronized start-up procedure, this function
-%% does not return until Module:init/1 has returned.  
-%%--------------------------------------------------------------------
-start_link(Role, Host, Port, Socket, Options, User, CbInfo) ->
-    {ok, proc_lib:spawn_link(?MODULE, init, [[Role, Host, Port, Socket, Options, User, CbInfo]])}.
+%%====================================================================
+%% Data handling
+%%====================================================================	     
+encode_data(Data, Version, ConnectionStates0)->
+    tls_record:encode_data(Data, Version, ConnectionStates0).
 
-init([Role, Host, Port, Socket, Options,  User, CbInfo]) ->
-    process_flag(trap_exit, true),
-    State0 = initial_state(Role, Host, Port, Socket, Options, User, CbInfo),
-    try 
-	State = ssl_connection:ssl_config(State0#state.ssl_options, Role, State0),
-	gen_statem:enter_loop(?MODULE, [], init, State)
-    catch throw:Error ->
-	gen_statem:enter_loop(?MODULE, [], error, {Error, State0}) 
+passive_receive(State0 = #state{user_data_buffer = Buffer}, StateName) -> 
+    case Buffer of
+	<<>> ->
+	    {Record, State} = next_record(State0),
+	    next_event(StateName, Record, State);
+	_ ->
+	    {Record, State} = ssl_connection:read_application_data(<<>>, State0),
+	    next_event(StateName, Record, State)
     end.
 
-callback_mode() ->
-    state_functions.
+next_record_if_active(State = 
+		      #state{socket_options = 
+			     #socket_options{active = false}}) -> 
+    {no_record ,State};
+next_record_if_active(State) ->
+    next_record(State).
+
+send(Transport, Socket, Data) ->
+   tls_socket:send(Transport, Socket, Data).
 
 socket(Pid,  Transport, Socket, Connection, Tracker) ->
     tls_socket:socket(Pid, Transport, Socket, Connection, Tracker).
 
 setopts(Transport, Socket, Other) ->
     tls_socket:setopts(Transport, Socket, Other).
+
 getopts(Transport, Socket, Tag) ->
     tls_socket:getopts(Transport, Socket, Tag).
 
@@ -216,7 +399,7 @@ getopts(Transport, Socket, Tag) ->
 
 init({call, From}, {start, Timeout}, 
      #state{host = Host, port = Port, role = client,
-	    ssl_options = #ssl_options{v2_hello_compatible = V2HComp} = SslOpts,
+	    ssl_options = SslOpts,
 	    session = #session{own_certificate = Cert} = Session0,
 	    transport_cb = Transport, socket = Socket,
 	    connection_states = ConnectionStates0,
@@ -232,7 +415,7 @@ init({call, From}, {start, Timeout},
     HelloVersion = tls_record:hello_version(Version, SslOpts#ssl_options.versions),
     Handshake0 = ssl_handshake:init_handshake_history(),
     {BinMsg, ConnectionStates, Handshake} =
-        encode_handshake(Hello,  HelloVersion, ConnectionStates0, Handshake0, V2HComp),
+        encode_handshake(Hello,  HelloVersion, ConnectionStates0, Handshake0),
     send(Transport, Socket, BinMsg),
     State1 = State0#state{connection_states = ConnectionStates,
 			  negotiated_version = Version, %% Requested version
@@ -244,7 +427,7 @@ init({call, From}, {start, Timeout},
     {Record, State} = next_record(State1),
     next_event(hello, Record, State);
 init(Type, Event, State) ->
-    gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+    gen_handshake(?FUNCTION_NAME, Type, Event, State).
  
 %%--------------------------------------------------------------------
 -spec error(gen_statem:event_type(),
@@ -253,9 +436,15 @@ init(Type, Event, State) ->
 %%--------------------------------------------------------------------
 
 error({call, From}, {start, _Timeout}, {Error, State}) ->
-    {stop_and_reply, normal, {reply, From, {error, Error}}, State};
-error({call, From}, Msg, State) ->
-    handle_call(Msg, From, ?FUNCTION_NAME, State);
+    ssl_connection:stop_and_reply(
+      normal, {reply, From, {error, Error}}, State);
+error({call, From}, {start, _Timeout}, 
+      #state{protocol_specific = #{error := Error}} = State) ->
+    ssl_connection:stop_and_reply(
+      normal, {reply, From, {error, Error}}, State);
+error({call, _} = Call, Msg, {Error, #state{protocol_specific = Map} = State}) ->
+    gen_handshake(?FUNCTION_NAME, Call, Msg, 
+                  State#state{protocol_specific = Map#{error => Error}});
 error(_, _, _) ->
      {keep_state_and_data, [postpone]}.
  
@@ -285,13 +474,13 @@ hello(internal, #client_hello{client_version = ClientVersion} = Hello,
 			   undefined -> CurrentProtocol;
 			   _ -> Protocol0
 		       end,
-	    
-	    gen_handshake(ssl_connection, hello, internal, {common_client_hello, Type, ServerHelloExt},
-				 State#state{connection_states  = ConnectionStates,
-					     negotiated_version = Version,
-					     hashsign_algorithm = HashSign,
-					     session = Session,
-					     negotiated_protocol = Protocol})
+            gen_handshake(?FUNCTION_NAME, internal, {common_client_hello, Type, ServerHelloExt},
+                          State#state{connection_states  = ConnectionStates,
+                                      negotiated_version = Version,
+                                      hashsign_algorithm = HashSign,
+                                      client_hello_version = ClientVersion,
+                                      session = Session,
+                                      negotiated_protocol = Protocol})
     end;
 hello(internal, #server_hello{} = Hello,
       #state{connection_states = ConnectionStates0,
@@ -309,7 +498,7 @@ hello(internal, #server_hello{} = Hello,
 hello(info, Event, State) ->
     gen_info(Event, ?FUNCTION_NAME, State);
 hello(Type, Event, State) ->
-    gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+    gen_handshake(?FUNCTION_NAME, Type, Event, State).
 
 %%--------------------------------------------------------------------
 -spec abbreviated(gen_statem:event_type(), term(), #state{}) ->
@@ -318,7 +507,7 @@ hello(Type, Event, State) ->
 abbreviated(info, Event, State) ->
     gen_info(Event, ?FUNCTION_NAME, State);
 abbreviated(Type, Event, State) ->
-    gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+    gen_handshake(?FUNCTION_NAME, Type, Event, State).
 
 %%--------------------------------------------------------------------
 -spec certify(gen_statem:event_type(), term(), #state{}) ->
@@ -327,7 +516,7 @@ abbreviated(Type, Event, State) ->
 certify(info, Event, State) ->
     gen_info(Event, ?FUNCTION_NAME, State);
 certify(Type, Event, State) ->
-    gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+    gen_handshake(?FUNCTION_NAME, Type, Event, State).
 
 %%--------------------------------------------------------------------
 -spec cipher(gen_statem:event_type(), term(), #state{}) ->
@@ -336,7 +525,7 @@ certify(Type, Event, State) ->
 cipher(info, Event, State) ->
     gen_info(Event, ?FUNCTION_NAME, State);
 cipher(Type, Event, State) ->
-     gen_handshake(ssl_connection, ?FUNCTION_NAME, Type, Event, State).
+     gen_handshake(?FUNCTION_NAME, Type, Event, State).
 
 %%--------------------------------------------------------------------
 -spec connection(gen_statem:event_type(),  
@@ -394,156 +583,24 @@ death_row(Type, Event, State) ->
 downgrade(Type, Event, State) ->
      ssl_connection:?FUNCTION_NAME(Type, Event, State, ?MODULE).
 
-%%--------------------------------------------------------------------
-%% Event handling functions called by state functions to handle
-%% common or unexpected events for the state.
-%%--------------------------------------------------------------------
-handle_call(Event, From, StateName, State) ->
-    ssl_connection:handle_call(Event, From, StateName, State, ?MODULE).
- 
-%% raw data from socket, unpack records
-handle_info({Protocol, _, Data}, StateName,
-            #state{data_tag = Protocol} = State0) ->
-    case next_tls_record(Data, State0) of
-	{Record, State} ->
-	    next_event(StateName, Record, State);
-	#alert{} = Alert ->
-	    ssl_connection:handle_normal_shutdown(Alert, StateName, State0), 
-	    {stop, {shutdown, own_alert}}
-    end;
-handle_info({CloseTag, Socket}, StateName,
-            #state{socket = Socket, close_tag = CloseTag,
-                   socket_options = #socket_options{active = Active},
-                   protocol_buffers = #protocol_buffers{tls_cipher_texts = CTs},
-		   negotiated_version = Version} = State) ->
-
-    %% Note that as of TLS 1.1,
-    %% failure to properly close a connection no longer requires that a
-    %% session not be resumed.  This is a change from TLS 1.0 to conform
-    %% with widespread implementation practice.
-
-    case (Active == false) andalso (CTs =/= []) of
-        false ->
-            case Version of
-                {1, N} when N >= 1 ->
-                    ok;
-                _ ->
-                    %% As invalidate_sessions here causes performance issues,
-                    %% we will conform to the widespread implementation
-                    %% practice and go aginst the spec
-                    %%invalidate_session(Role, Host, Port, Session)
-                    ok
-            end,
-
-            ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
-            {stop, {shutdown, transport_closed}};
-        true ->
-            %% Fixes non-delivery of final TLS record in {active, once}.
-            %% Basically allows the application the opportunity to set {active, once} again
-            %% and then receive the final message.
-            next_event(StateName, no_record, State)
-    end;
-handle_info(Msg, StateName, State) ->
-    ssl_connection:StateName(info, Msg, State, ?MODULE).
-
-handle_common_event(internal, #alert{} = Alert, StateName, 
-		    #state{negotiated_version = Version} = State) ->
-    ssl_connection:handle_own_alert(Alert, Version, StateName, State);
-
-%%% TLS record protocol level handshake messages 
-handle_common_event(internal,  #ssl_tls{type = ?HANDSHAKE, fragment = Data}, 
-		    StateName, #state{protocol_buffers =
-					  #protocol_buffers{tls_handshake_buffer = Buf0} = Buffers,
-				      negotiated_version = Version,
-				      ssl_options = Options} = State0) ->
-    try
-	{Packets, Buf} = tls_handshake:get_tls_handshake(Version,Data,Buf0, Options),
-	State1 =
-	    State0#state{protocol_buffers =
-			     Buffers#protocol_buffers{tls_handshake_buffer = Buf}},
-	case Packets of
-            [] -> 
-                assert_buffer_sanity(Buf, Options),
-                {Record, State} = next_record(State1),
-                next_event(StateName, Record, State);
-            _ ->                
-                Events = tls_handshake_events(Packets),
-                case StateName of
-                    connection ->
-                        ssl_connection:hibernate_after(StateName, State1, Events);
-                    _ ->
-                        {next_state, StateName, 
-                         State1#state{unprocessed_handshake_events = unprocessed_events(Events)}, Events}
-                end
-        end
-    catch throw:#alert{} = Alert ->
-            ssl_connection:handle_own_alert(Alert, Version, StateName, State0)
-    end;
-%%% TLS record protocol level application data messages 
-handle_common_event(internal, #ssl_tls{type = ?APPLICATION_DATA, fragment = Data}, StateName, State) ->
-    {next_state, StateName, State, [{next_event, internal, {application_data, Data}}]};
-%%% TLS record protocol level change cipher messages
-handle_common_event(internal, #ssl_tls{type = ?CHANGE_CIPHER_SPEC, fragment = Data}, StateName, State) ->
-    {next_state, StateName, State, [{next_event, internal, #change_cipher_spec{type = Data}}]};
-%%% TLS record protocol level Alert messages
-handle_common_event(internal, #ssl_tls{type = ?ALERT, fragment = EncAlerts}, StateName,
-		    #state{negotiated_version = Version} = State) ->
-    try decode_alerts(EncAlerts) of	
-	Alerts = [_|_] ->
-	    handle_alerts(Alerts,  {next_state, StateName, State});
-	[] ->
-	    ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, empty_alert), 
-					    Version, StateName, State);
-	#alert{} = Alert ->
-	    ssl_connection:handle_own_alert(Alert, Version, StateName, State)
-    catch
-	_:_ ->
-	    ssl_connection:handle_own_alert(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, alert_decode_error),
-					    Version, StateName, State)  
-
-    end;
-%% Ignore unknown TLS record level protocol messages
-handle_common_event(internal, #ssl_tls{type = _Unknown}, StateName, State) ->
-    {next_state, StateName, State}.
-
-send(Transport, Socket, Data) ->
-   tls_socket:send(Transport, Socket, Data).
-
-%%--------------------------------------------------------------------
+%--------------------------------------------------------------------
 %% gen_statem callbacks
 %%--------------------------------------------------------------------
+callback_mode() ->
+    state_functions.
+
 terminate(Reason, StateName, State) ->
     catch ssl_connection:terminate(Reason, StateName, State).
 
 format_status(Type, Data) ->
     ssl_connection:format_status(Type, Data).
 
-%%--------------------------------------------------------------------
-%% code_change(OldVsn, StateName, State, Extra) -> {ok, StateName, NewState}
-%% Description: Convert process state when code is changed
-%%--------------------------------------------------------------------
-code_change(_OldVsn, StateName, State0, {Direction, From, To}) ->
-    State = convert_state(State0, Direction, From, To),
-    {ok, StateName, State};
 code_change(_OldVsn, StateName, State, _) ->
     {ok, StateName, State}.
 
 %%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------
-encode_handshake(Handshake, Version, ConnectionStates0, Hist0, V2HComp) ->
-    Frag = tls_handshake:encode_handshake(Handshake, Version),
-    Hist = ssl_handshake:update_handshake_history(Hist0, Frag, V2HComp),
-    {Encoded, ConnectionStates} =
-        tls_record:encode_handshake(Frag, Version, ConnectionStates0),
-    {Encoded, ConnectionStates, Hist}.
-
-encode_change_cipher(#change_cipher_spec{}, Version, ConnectionStates) ->
-    tls_record:encode_change_cipher_spec(Version, ConnectionStates).
-
-decode_alerts(Bin) ->
-    ssl_alert:decode(Bin).
-
 initial_state(Role, Host, Port, Socket, {SSLOptions, SocketOptions, Tracker}, User,
 	      {CbModule, DataTag, CloseTag, ErrorTag}) ->
     #ssl_options{beast_mitigation = BeastMitigation} = SSLOptions,
@@ -582,170 +639,105 @@ initial_state(Role, Host, Port, Socket, {SSLOptions, SocketOptions, Tracker}, Us
 	   flight_buffer = []
 	  }.
 
-next_tls_record(Data, #state{protocol_buffers = #protocol_buffers{tls_record_buffer = Buf0,
-						tls_cipher_texts = CT0} = Buffers} = State0) ->
-    case tls_record:get_tls_records(Data, Buf0) of
+next_tls_record(Data, StateName, #state{protocol_buffers = 
+                                            #protocol_buffers{tls_record_buffer = Buf0,
+                                                              tls_cipher_texts = CT0} = Buffers}
+                                        = State0) ->
+    case tls_record:get_tls_records(Data, 
+                                    acceptable_record_versions(StateName, State0),
+                                    Buf0) of
 	{Records, Buf1} ->
 	    CT1 = CT0 ++ Records,
 	    next_record(State0#state{protocol_buffers =
 					 Buffers#protocol_buffers{tls_record_buffer = Buf1,
 								  tls_cipher_texts = CT1}});
 	#alert{} = Alert ->
-	    Alert
-    end.
-next_record(#state{unprocessed_handshake_events = N} = State) when N > 0 ->
-    {no_record, State#state{unprocessed_handshake_events = N-1}};
-					 
-next_record(#state{protocol_buffers =
-		       #protocol_buffers{tls_packets = [], tls_cipher_texts = [CT | Rest]}
-		   = Buffers,
-		   connection_states = ConnStates0,
-		   ssl_options = #ssl_options{padding_check = Check}} = State) ->
-    case tls_record:decode_cipher_text(CT, ConnStates0, Check) of
-	{Plain, ConnStates} ->		      
-	    {Plain, State#state{protocol_buffers =
-				    Buffers#protocol_buffers{tls_cipher_texts = Rest},
-				connection_states = ConnStates}};
-	#alert{} = Alert ->
-	    {Alert, State}
-    end;
-next_record(#state{protocol_buffers = #protocol_buffers{tls_packets = [], tls_cipher_texts = []},
-		   socket = Socket,
-		   transport_cb = Transport} = State) ->
-    case tls_socket:setopts(Transport, Socket, [{active,once}]) of
-	ok ->
-	    {no_record, State};
-	_ ->
-	    {socket_closed, State}
-    end;
-next_record(State) ->
-    {no_record, State}.
-
-next_record_if_active(State = 
-		      #state{socket_options = 
-			     #socket_options{active = false}}) -> 
-    {no_record ,State};
-
-next_record_if_active(State) ->
-    next_record(State).
-
-passive_receive(State0 = #state{user_data_buffer = Buffer}, StateName) -> 
-    case Buffer of
-	<<>> ->
-	    {Record, State} = next_record(State0),
-	    next_event(StateName, Record, State);
-	_ ->
-	    {Record, State} = ssl_connection:read_application_data(<<>>, State0),
-	    next_event(StateName, Record, State)
+	    handle_record_alert(Alert, State0)
     end.
 
-next_event(StateName, Record, State) ->
-    next_event(StateName, Record, State, []).
 
-next_event(StateName, socket_closed, State, _) ->
-    ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
-    {stop, {shutdown, transport_closed}, State};
-next_event(connection = StateName, no_record, State0, Actions) ->
-    case next_record_if_active(State0) of
-	{no_record, State} ->
-	    ssl_connection:hibernate_after(StateName, State, Actions);
-	{socket_closed, State} ->
-	    next_event(StateName, socket_closed, State, Actions);
-	{#ssl_tls{} = Record, State} ->
-	    {next_state, StateName, State, [{next_event, internal, {protocol_record, Record}} | Actions]};
-	{#alert{} = Alert, State} ->
-	    {next_state, StateName, State, [{next_event, internal, Alert} | Actions]}
-    end;
-next_event(StateName, Record, State, Actions) ->
-    case Record of
-	no_record ->
-	    {next_state, StateName, State, Actions};
-	#ssl_tls{} = Record ->
-	    {next_state, StateName, State, [{next_event, internal, {protocol_record, Record}} | Actions]};
-	#alert{} = Alert ->
-	    {next_state, StateName, State, [{next_event, internal, Alert} | Actions]}
-    end.
+acceptable_record_versions(hello, _) ->
+    [tls_record:protocol_version(Vsn) || Vsn <- ?ALL_AVAILABLE_VERSIONS];
+acceptable_record_versions(_, #state{negotiated_version = Version}) ->
+    [Version].
+handle_record_alert(Alert, _) ->
+    Alert.
 
 tls_handshake_events(Packets) ->
     lists:map(fun(Packet) ->
 		      {next_event, internal, {handshake, Packet}}
 	      end, Packets).
 
+%% raw data from socket, upack records
+handle_info({Protocol, _, Data}, StateName,
+            #state{data_tag = Protocol} = State0) ->
+    case next_tls_record(Data, StateName, State0) of
+	{Record, State} ->
+	    next_event(StateName, Record, State);
+	#alert{} = Alert ->
+	    ssl_connection:handle_normal_shutdown(Alert, StateName, State0), 
+	    ssl_connection:stop({shutdown, own_alert}, State0)
+    end;
+handle_info({CloseTag, Socket}, StateName,
+            #state{socket = Socket, close_tag = CloseTag,
+                   socket_options = #socket_options{active = Active},
+                   protocol_buffers = #protocol_buffers{tls_cipher_texts = CTs},
+		   negotiated_version = Version} = State) ->
 
-renegotiate(#state{role = client} = State, Actions) ->
-    %% Handle same way as if server requested
-    %% the renegotiation
-    Hs0 = ssl_handshake:init_handshake_history(),
-    {next_state, connection, State#state{tls_handshake_history = Hs0}, 
-     [{next_event, internal, #hello_request{}} | Actions]};
+    %% Note that as of TLS 1.1,
+    %% failure to properly close a connection no longer requires that a
+    %% session not be resumed.  This is a change from TLS 1.0 to conform
+    %% with widespread implementation practice.
 
-renegotiate(#state{role = server,
-		   socket = Socket,
-		   transport_cb = Transport,
-		   negotiated_version = Version,
-		   connection_states = ConnectionStates0} = State0, Actions) ->
-    HelloRequest = ssl_handshake:hello_request(),
-    Frag = tls_handshake:encode_handshake(HelloRequest, Version),
-    Hs0 = ssl_handshake:init_handshake_history(),
-    {BinMsg, ConnectionStates} = 
-	tls_record:encode_handshake(Frag, Version, ConnectionStates0),
-    send(Transport, Socket, BinMsg),
-    State1 = State0#state{connection_states = 
-			     ConnectionStates,
-			 tls_handshake_history = Hs0},
-    {Record, State} = next_record(State1),
-    next_event(hello, Record, State, Actions).
+    case (Active == false) andalso (CTs =/= []) of
+        false ->
+            case Version of
+                {1, N} when N >= 1 ->
+                    ok;
+                _ ->
+                    %% As invalidate_sessions here causes performance issues,
+                    %% we will conform to the widespread implementation
+                    %% practice and go aginst the spec
+                    %%invalidate_session(Role, Host, Port, Session)
+                    ok
+            end,
+
+            ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
+            ssl_connection:stop({shutdown, transport_closed}, State);
+        true ->
+            %% Fixes non-delivery of final TLS record in {active, once}.
+            %% Basically allows the application the opportunity to set {active, once} again
+            %% and then receive the final message.
+            next_event(StateName, no_record, State)
+    end;
+handle_info(Msg, StateName, State) ->
+    ssl_connection:StateName(info, Msg, State, ?MODULE).
 
 handle_alerts([], Result) ->
     Result;
-handle_alerts(_, {stop,_} = Stop) ->
+handle_alerts(_, {stop, _, _} = Stop) ->
     Stop;
 handle_alerts([Alert | Alerts], {next_state, StateName, State}) ->
      handle_alerts(Alerts, ssl_connection:handle_alert(Alert, StateName, State));
 handle_alerts([Alert | Alerts], {next_state, StateName, State, _Actions}) ->
      handle_alerts(Alerts, ssl_connection:handle_alert(Alert, StateName, State)).
 
+encode_handshake(Handshake, Version, ConnectionStates0, Hist0) ->
+    Frag = tls_handshake:encode_handshake(Handshake, Version),
+    Hist = ssl_handshake:update_handshake_history(Hist0, Frag),
+    {Encoded, ConnectionStates} =
+        tls_record:encode_handshake(Frag, Version, ConnectionStates0),
+    {Encoded, ConnectionStates, Hist}.
 
-%% User closes or recursive call!
-close({close, Timeout}, Socket, Transport = gen_tcp, _,_) ->
-    tls_socket:setopts(Transport, Socket, [{active, false}]),
-    Transport:shutdown(Socket, write),
-    _ = Transport:recv(Socket, 0, Timeout),
-    ok;
-%% Peer closed socket
-close({shutdown, transport_closed}, Socket, Transport = gen_tcp, ConnectionStates, Check) ->
-    close({close, 0}, Socket, Transport, ConnectionStates, Check);
-%% We generate fatal alert
-close({shutdown, own_alert}, Socket, Transport = gen_tcp, ConnectionStates, Check) ->
-    %% Standard trick to try to make sure all
-    %% data sent to the tcp port is really delivered to the
-    %% peer application before tcp port is closed so that the peer will
-    %% get the correct TLS alert message and not only a transport close.
-    %% Will return when other side has closed or after timout millisec
-    %% e.g. we do not want to hang if something goes wrong
-    %% with the network but we want to maximise the odds that
-    %% peer application gets all data sent on the tcp connection.
-    close({close, ?DEFAULT_TIMEOUT}, Socket, Transport, ConnectionStates, Check);
-close(downgrade, _,_,_,_) ->
-    ok;
-%% Other
-close(_, Socket, Transport, _,_) -> 
-    Transport:close(Socket).
-
-convert_state(#state{ssl_options = Options} = State, up, "5.3.5", "5.3.6") ->
-    State#state{ssl_options = convert_options_partial_chain(Options, up)};
-convert_state(#state{ssl_options = Options} = State, down, "5.3.6", "5.3.5") ->
-    State#state{ssl_options = convert_options_partial_chain(Options, down)}.
+encode_change_cipher(#change_cipher_spec{}, Version, ConnectionStates) ->
+    tls_record:encode_change_cipher_spec(Version, ConnectionStates).
 
-convert_options_partial_chain(Options, up) ->
-    {Head, Tail} = lists:split(5, tuple_to_list(Options)),
-    list_to_tuple(Head ++ [{partial_chain, fun(_) -> unknown_ca end}] ++ Tail);
-convert_options_partial_chain(Options, down) ->
-    list_to_tuple(proplists:delete(partial_chain, tuple_to_list(Options))).
+decode_alerts(Bin) ->
+    ssl_alert:decode(Bin).
 
-gen_handshake(GenConnection, StateName, Type, Event, 
+gen_handshake(StateName, Type, Event, 
 	      #state{negotiated_version = Version} = State) ->
-    try GenConnection:StateName(Type, Event, State, ?MODULE) of
+    try ssl_connection:StateName(Type, Event, State, ?MODULE) of
 	Result ->
 	    Result
     catch 
diff --git a/lib/ssl/src/tls_handshake.erl b/lib/ssl/src/tls_handshake.erl
index b54540393a..0058b9c8ae 100644
--- a/lib/ssl/src/tls_handshake.erl
+++ b/lib/ssl/src/tls_handshake.erl
@@ -32,13 +32,19 @@
 -include("ssl_cipher.hrl").
 -include_lib("public_key/include/public_key.hrl").
 
--export([client_hello/8, hello/4,
-	 get_tls_handshake/4, encode_handshake/2, decode_handshake/4]).
+%% Handshake handling
+-export([client_hello/8, hello/4]).
+
+%% Handshake encoding
+-export([encode_handshake/2]).
+
+%% Handshake decodeing
+-export([get_tls_handshake/4, decode_handshake/3]).
 
 -type tls_handshake() :: #client_hello{} | ssl_handshake:ssl_handshake().
 
 %%====================================================================
-%% Internal application API
+%% Handshake handling
 %%====================================================================
 %%--------------------------------------------------------------------
 -spec client_hello(host(), inet:port_number(), ssl_record:connection_states(),
@@ -54,18 +60,14 @@ client_hello(Host, Port, ConnectionStates,
 			 } = SslOpts,
 	     Cache, CacheCb, Renegotiation, OwnCert) ->
     Version = tls_record:highest_protocol_version(Versions),
-    #{security_parameters := SecParams} = ssl_record:pending_connection_state(ConnectionStates, read),
+    #{security_parameters := SecParams} = 
+        ssl_record:pending_connection_state(ConnectionStates, read),
     AvailableCipherSuites = ssl_handshake:available_suites(UserSuites, Version),     
     Extensions = ssl_handshake:client_hello_extensions(Version, 
 						       AvailableCipherSuites,
-						       SslOpts, ConnectionStates, Renegotiation),
-    CipherSuites = 
-	case Fallback of
-	    true ->
-	        [?TLS_FALLBACK_SCSV | ssl_handshake:cipher_suites(AvailableCipherSuites, Renegotiation)];
-	    false ->
-		ssl_handshake:cipher_suites(AvailableCipherSuites, Renegotiation)
-	end,
+						       SslOpts, ConnectionStates, 
+                                                       Renegotiation),
+    CipherSuites = ssl_handshake:cipher_suites(AvailableCipherSuites, Renegotiation, Fallback),
     Id = ssl_session:client_id({Host, Port, SslOpts}, Cache, CacheCb, OwnCert),    
     #client_hello{session_id = Id,
 		  client_version = Version,
@@ -85,8 +87,8 @@ client_hello(Host, Port, ConnectionStates,
 		    ssl_record:connection_states(), alpn | npn, binary() | undefined}|
 		   {tls_record:tls_version(), {resumed | new, #session{}}, 
 		    ssl_record:connection_states(), binary() | undefined, 
-		    #hello_extensions{}, {ssl_cipher:hash(), ssl_cipher:sign_algo()} | undefined} |
-		   #alert{}.
+		    #hello_extensions{}, {ssl_cipher:hash(), ssl_cipher:sign_algo()} | 
+                    undefined} | #alert{}.
 %%
 %% Description: Handles a received hello message
 %%--------------------------------------------------------------------
@@ -99,7 +101,8 @@ hello(#server_hello{server_version = Version, random = Random,
     case tls_record:is_acceptable_version(Version, SupportedVersions) of
 	true ->
 	    handle_server_hello_extensions(Version, SessionId, Random, CipherSuite,
-					   Compression, HelloExt, SslOpt, ConnectionStates0, Renegotiation);
+					   Compression, HelloExt, SslOpt, 
+                                           ConnectionStates0, Renegotiation);
 	false ->
 	    ?ALERT_REC(?FATAL, ?PROTOCOL_VERSION)
     end;
@@ -127,18 +130,29 @@ hello(#client_hello{client_version = ClientVersion,
 	    ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, malformed_handshake_data)
     end.  
 
+
+%%--------------------------------------------------------------------
+%%% Handshake encodeing
+%%--------------------------------------------------------------------
+
 %%--------------------------------------------------------------------
 -spec encode_handshake(tls_handshake(), tls_record:tls_version()) -> iolist().
 %%     
 %% Description: Encode a handshake packet
-%%--------------------------------------------------------------------x
+%%--------------------------------------------------------------------
 encode_handshake(Package, Version) ->
     {MsgType, Bin} = enc_handshake(Package, Version),
     Len = byte_size(Bin),
     [MsgType, ?uint24(Len), Bin].
 
+
 %%--------------------------------------------------------------------
--spec get_tls_handshake(tls_record:tls_version(), binary(), binary() | iolist(), #ssl_options{}) ->
+%%% Handshake decodeing
+%%--------------------------------------------------------------------
+
+%%--------------------------------------------------------------------
+-spec get_tls_handshake(tls_record:tls_version(), binary(), binary() | iolist(), 
+                        #ssl_options{}) ->
      {[tls_handshake()], binary()}.
 %%
 %% Description: Given buffered and new data from ssl_record, collects
@@ -153,37 +167,45 @@ get_tls_handshake(Version, Data, Buffer, Options) ->
 %%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------
-handle_client_hello(Version, #client_hello{session_id = SugesstedId,
-					   cipher_suites = CipherSuites,
-					   compression_methods = Compressions,
-					   random = Random,
-					   extensions = #hello_extensions{elliptic_curves = Curves,
-									  signature_algs = ClientHashSigns} = HelloExt},
+handle_client_hello(Version, 
+                    #client_hello{session_id = SugesstedId,
+                                  cipher_suites = CipherSuites,
+                                  compression_methods = Compressions,
+                                  random = Random,
+                                  extensions = 
+                                      #hello_extensions{elliptic_curves = Curves,
+                                                        signature_algs = ClientHashSigns} 
+                                  = HelloExt},
 		    #ssl_options{versions = Versions,
 				 signature_algs = SupportedHashSigns,
 				 eccs = SupportedECCs,
 				 honor_ecc_order = ECCOrder} = SslOpts,
-		    {Port, Session0, Cache, CacheCb, ConnectionStates0, Cert, _}, Renegotiation) ->
+		    {Port, Session0, Cache, CacheCb, ConnectionStates0, Cert, _}, 
+                    Renegotiation) ->
     case tls_record:is_acceptable_version(Version, Versions) of
 	true ->
 	    AvailableHashSigns = ssl_handshake:available_signature_algs(
 				   ClientHashSigns, SupportedHashSigns, Cert, Version),
 	    ECCCurve = ssl_handshake:select_curve(Curves, SupportedECCs, ECCOrder),
 	    {Type, #session{cipher_suite = CipherSuite} = Session1}
-		= ssl_handshake:select_session(SugesstedId, CipherSuites, AvailableHashSigns, Compressions,
-					       Port, Session0#session{ecc = ECCCurve}, Version,
-					       SslOpts, Cache, CacheCb, Cert),
+		= ssl_handshake:select_session(SugesstedId, CipherSuites, 
+                                               AvailableHashSigns, Compressions,
+					       Port, Session0#session{ecc = ECCCurve}, 
+                                               Version, SslOpts, Cache, CacheCb, Cert),
 	    case CipherSuite of 
 		no_suite ->
                     ?ALERT_REC(?FATAL, ?INSUFFICIENT_SECURITY, no_suitable_ciphers);
 		_ ->
-		    {KeyExAlg,_,_,_} = ssl_cipher:suite_definition(CipherSuite),
-		    case ssl_handshake:select_hashsign(ClientHashSigns, Cert, KeyExAlg, SupportedHashSigns, Version) of
+		    #{key_exchange := KeyExAlg} = ssl_cipher:suite_definition(CipherSuite),
+		    case ssl_handshake:select_hashsign(ClientHashSigns, Cert, KeyExAlg, 
+                                                       SupportedHashSigns, Version) of
 			#alert{} = Alert ->
 			    Alert;
 			HashSign ->
-			    handle_client_hello_extensions(Version, Type, Random, CipherSuites, HelloExt,
-							   SslOpts, Session1, ConnectionStates0,
+			    handle_client_hello_extensions(Version, Type, Random, 
+                                                           CipherSuites, HelloExt,
+							   SslOpts, Session1, 
+                                                           ConnectionStates0,
 							   Renegotiation, HashSign)
 		    end
 	    end;
@@ -191,84 +213,35 @@ handle_client_hello(Version, #client_hello{session_id = SugesstedId,
 	    ?ALERT_REC(?FATAL, ?PROTOCOL_VERSION)
     end.
 
-get_tls_handshake_aux(Version, <<?BYTE(Type), ?UINT24(Length),
-				 Body:Length/binary,Rest/binary>>, 
-                      #ssl_options{v2_hello_compatible = V2Hello} = Opts,  Acc) ->
-    Raw = <<?BYTE(Type), ?UINT24(Length), Body/binary>>,
-    try decode_handshake(Version, Type, Body, V2Hello) of
-	Handshake ->
-	    get_tls_handshake_aux(Version, Rest, Opts, [{Handshake,Raw} | Acc])
-    catch
-	_:_ ->
-	    throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, handshake_decode_error))
-    end;
-get_tls_handshake_aux(_Version, Data, _, Acc) ->
-    {lists:reverse(Acc), Data}.
-
-decode_handshake(_, ?HELLO_REQUEST, <<>>, _) ->
-    #hello_request{};
-
-decode_handshake(_Version, ?CLIENT_HELLO, Bin, true) ->
-    try decode_hello(Bin) of
-        Hello ->
-            Hello
-    catch
-        _:_ ->
-            decode_v2_hello(Bin)
-    end;
-decode_handshake(_Version, ?CLIENT_HELLO, Bin, false) ->
-    decode_hello(Bin);
-
-decode_handshake(_Version, ?CLIENT_HELLO, <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
-					    ?BYTE(SID_length), Session_ID:SID_length/binary,
-					    ?UINT16(Cs_length), CipherSuites:Cs_length/binary,
-					    ?BYTE(Cm_length), Comp_methods:Cm_length/binary,
-					    Extensions/binary>>, _) ->
-    
-    DecodedExtensions = ssl_handshake:decode_hello_extensions({client, Extensions}),
-
-    #client_hello{
-       client_version = {Major,Minor},
-       random = Random,
-       session_id = Session_ID,
-       cipher_suites = ssl_handshake:decode_suites('2_bytes', CipherSuites),
-       compression_methods = Comp_methods,
-       extensions = DecodedExtensions
-      };
-decode_handshake(Version, Tag, Msg, _) ->
-    ssl_handshake:decode_handshake(Version, Tag, Msg).
+handle_client_hello_extensions(Version, Type, Random, CipherSuites,
+                               HelloExt, SslOpts, Session0, ConnectionStates0, 
+                               Renegotiation, HashSign) ->
+    try ssl_handshake:handle_client_hello_extensions(tls_record, Random, CipherSuites,
+						     HelloExt, Version, SslOpts,
+						     Session0, ConnectionStates0, 
+                                                     Renegotiation) of
+	#alert{} = Alert ->
+	    Alert;
+	{Session, ConnectionStates, Protocol, ServerHelloExt} ->
+	    {Version, {Type, Session}, ConnectionStates, Protocol, 
+             ServerHelloExt, HashSign}
+    catch throw:Alert ->
+	    Alert
+    end.
 
 
-decode_hello(<<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
-               ?BYTE(SID_length), Session_ID:SID_length/binary,
-               ?UINT16(Cs_length), CipherSuites:Cs_length/binary,
-               ?BYTE(Cm_length), Comp_methods:Cm_length/binary,
-               Extensions/binary>>) ->
-    DecodedExtensions = ssl_handshake:decode_hello_extensions({client, Extensions}),
-    
-    #client_hello{
-       client_version = {Major,Minor},
-       random = Random,
-       session_id = Session_ID,
-       cipher_suites = ssl_handshake:decode_suites('2_bytes', CipherSuites),
-       compression_methods = Comp_methods,
-       extensions = DecodedExtensions
-      }.
-%% The server must be able to receive such messages, from clients that
-%% are willing to use ssl v3 or higher, but have ssl v2 compatibility.
-decode_v2_hello(<<?BYTE(Major), ?BYTE(Minor),
-                  ?UINT16(CSLength), ?UINT16(0),
-                  ?UINT16(CDLength),
-                  CipherSuites:CSLength/binary,
-                  ChallengeData:CDLength/binary>>) ->
-    #client_hello{client_version = {Major, Minor},
-		  random = ssl_v2:client_random(ChallengeData, CDLength),
-		  session_id = 0,
-		  cipher_suites =  ssl_handshake:decode_suites('3_bytes', CipherSuites),
-		  compression_methods = [?NULL],
-		  extensions = #hello_extensions{}
-		 }.
-
+handle_server_hello_extensions(Version, SessionId, Random, CipherSuite,
+			Compression, HelloExt, SslOpt, ConnectionStates0, Renegotiation) ->
+    case ssl_handshake:handle_server_hello_extensions(tls_record, Random, CipherSuite,
+						      Compression, HelloExt, Version,
+						      SslOpt, ConnectionStates0, 
+                                                      Renegotiation) of
+	#alert{} = Alert ->
+	    Alert;
+	{ConnectionStates, ProtoExt, Protocol} ->
+	    {Version, SessionId, ConnectionStates, ProtoExt, Protocol}
+    end.
+%%--------------------------------------------------------------------
 enc_handshake(#hello_request{}, _Version) ->
     {?HELLO_REQUEST, <<>>};
 enc_handshake(#client_hello{client_version = {Major, Minor},
@@ -292,29 +265,39 @@ enc_handshake(#client_hello{client_version = {Major, Minor},
 enc_handshake(HandshakeMsg, Version) ->
     ssl_handshake:encode_handshake(HandshakeMsg, Version).
 
+%%--------------------------------------------------------------------
+get_tls_handshake_aux(Version, <<?BYTE(Type), ?UINT24(Length),
+				 Body:Length/binary,Rest/binary>>, 
+                      Opts,  Acc) ->
+    Raw = <<?BYTE(Type), ?UINT24(Length), Body/binary>>,
+    try decode_handshake(Version, Type, Body) of
+	Handshake ->
+	    get_tls_handshake_aux(Version, Rest, Opts, [{Handshake,Raw} | Acc])
+    catch
+	_:_ ->
+	    throw(?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE, handshake_decode_error))
+    end;
+get_tls_handshake_aux(_Version, Data, _, Acc) ->
+    {lists:reverse(Acc), Data}.
 
-handle_client_hello_extensions(Version, Type, Random, CipherSuites,
-			HelloExt, SslOpts, Session0, ConnectionStates0, Renegotiation, HashSign) ->
-    try ssl_handshake:handle_client_hello_extensions(tls_record, Random, CipherSuites,
-						     HelloExt, Version, SslOpts,
-						     Session0, ConnectionStates0, Renegotiation) of
-	#alert{} = Alert ->
-	    Alert;
-	{Session, ConnectionStates, Protocol, ServerHelloExt} ->
-	    {Version, {Type, Session}, ConnectionStates, Protocol, ServerHelloExt, HashSign}
-    catch throw:Alert ->
-	    Alert
-    end.
-
+decode_handshake(_, ?HELLO_REQUEST, <<>>) ->
+    #hello_request{};
+decode_handshake(_Version, ?CLIENT_HELLO, 
+                 <<?BYTE(Major), ?BYTE(Minor), Random:32/binary,
+                   ?BYTE(SID_length), Session_ID:SID_length/binary,
+                   ?UINT16(Cs_length), CipherSuites:Cs_length/binary,
+                   ?BYTE(Cm_length), Comp_methods:Cm_length/binary,
+                   Extensions/binary>>) ->
+    DecodedExtensions = ssl_handshake:decode_hello_extensions({client, Extensions}),
+    #client_hello{
+       client_version = {Major,Minor},
+       random = Random,
+       session_id = Session_ID,
+       cipher_suites = ssl_handshake:decode_suites('2_bytes', CipherSuites),
+       compression_methods = Comp_methods,
+       extensions = DecodedExtensions
+      };
+decode_handshake(Version, Tag, Msg) ->
+    ssl_handshake:decode_handshake(Version, Tag, Msg).
 
-handle_server_hello_extensions(Version, SessionId, Random, CipherSuite,
-			Compression, HelloExt, SslOpt, ConnectionStates0, Renegotiation) ->
-    case ssl_handshake:handle_server_hello_extensions(tls_record, Random, CipherSuite,
-						      Compression, HelloExt, Version,
-						      SslOpt, ConnectionStates0, Renegotiation) of
-	#alert{} = Alert ->
-	    Alert;
-	{ConnectionStates, ProtoExt, Protocol} ->
-	    {Version, SessionId, ConnectionStates, ProtoExt, Protocol}
-    end.
 
diff --git a/lib/ssl/src/tls_record.erl b/lib/ssl/src/tls_record.erl
index 4ac6cdc6b5..aa70508f1e 100644
--- a/lib/ssl/src/tls_record.erl
+++ b/lib/ssl/src/tls_record.erl
@@ -32,22 +32,22 @@
 -include("ssl_cipher.hrl").
 
 %% Handling of incoming data
--export([get_tls_records/2, init_connection_states/2]).
+-export([get_tls_records/3, init_connection_states/2]).
 
 %% Encoding TLS records
 -export([encode_handshake/3, encode_alert_record/3,
 	 encode_change_cipher_spec/2, encode_data/3]).
 -export([encode_plain_text/4]).
 
+%% Decoding
+-export([decode_cipher_text/3]).
+
 %% Protocol version handling
 -export([protocol_version/1,  lowest_protocol_version/1, lowest_protocol_version/2,
 	 highest_protocol_version/1, highest_protocol_version/2,
 	 is_higher/2, supported_protocol_versions/0,
 	 is_acceptable_version/1, is_acceptable_version/2, hello_version/2]).
 
-%% Decoding
--export([decode_cipher_text/3]).
-
 -export_type([tls_version/0, tls_atom_version/0]).
 
 -type tls_version()       :: ssl_record:ssl_version().
@@ -56,13 +56,12 @@
 -compile(inline).
 
 %%====================================================================
-%% Internal application API
+%% Handling of incoming data
 %%====================================================================
 %%--------------------------------------------------------------------
 -spec init_connection_states(client | server, one_n_minus_one | zero_n | disabled) ->
  				    ssl_record:connection_states().
-%% %
-						%
+%% 
 %% Description: Creates a connection_states record with appropriate
 %% values for the initial SSL connection setup.
 %%--------------------------------------------------------------------
@@ -76,16 +75,29 @@ init_connection_states(Role, BeastMitigation) ->
       pending_write => Pending}.
 
 %%--------------------------------------------------------------------
--spec get_tls_records(binary(), binary()) -> {[binary()], binary()} | #alert{}.
+-spec get_tls_records(binary(), [tls_version()], binary()) -> {[binary()], binary()} | #alert{}.
 %%			     
 %% and returns it as a list of tls_compressed binaries also returns leftover
 %% Description: Given old buffer and new data from TCP, packs up a records
 %% data
 %%--------------------------------------------------------------------
-get_tls_records(Data, <<>>) ->
-    get_tls_records_aux(Data, []);
-get_tls_records(Data, Buffer) ->
-    get_tls_records_aux(list_to_binary([Buffer, Data]), []).
+get_tls_records(Data, Versions, Buffer) ->
+    BinData = list_to_binary([Buffer, Data]),
+    case erlang:byte_size(BinData) of
+        N when N >= 3 ->
+            case assert_version(BinData, Versions) of
+                true ->
+                    get_tls_records_aux(BinData, []);
+                false ->
+                    ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC)
+            end;
+        _ ->
+            get_tls_records_aux(BinData, [])
+    end.
+
+%%====================================================================
+%% Encoding
+%%====================================================================
 
 %%--------------------------------------------------------------------
 -spec encode_handshake(iolist(), tls_version(), ssl_record:connection_states()) ->
@@ -141,6 +153,74 @@ encode_data(Frag, Version,
     Data = split_bin(Frag, ?MAX_PLAIN_TEXT_LENGTH, Version, BCA, BeastMitigation),
     encode_iolist(?APPLICATION_DATA, Data, Version, ConnectionStates).
 
+%%====================================================================
+%% Decoding
+%%====================================================================
+
+%%--------------------------------------------------------------------
+-spec decode_cipher_text(#ssl_tls{}, ssl_record:connection_states(), boolean()) ->
+				{#ssl_tls{}, ssl_record:connection_states()}| #alert{}.
+%%
+%% Description: Decode cipher text
+%%--------------------------------------------------------------------
+decode_cipher_text(#ssl_tls{type = Type, version = Version,
+			    fragment = CipherFragment} = CipherText,
+		   #{current_read :=
+			 #{compression_state := CompressionS0,
+			   sequence_number := Seq,
+                           cipher_state := CipherS0,
+			   security_parameters :=
+			       #security_parameters{
+				  cipher_type = ?AEAD,
+                                  bulk_cipher_algorithm =
+                                      BulkCipherAlgo,
+				  compression_algorithm = CompAlg}
+			  } = ReadState0} = ConnnectionStates0, _) ->
+    AAD = calc_aad(Type, Version, ReadState0),
+    case ssl_cipher:decipher_aead(BulkCipherAlgo, CipherS0, Seq, AAD, CipherFragment, Version) of
+	{PlainFragment, CipherS1} ->
+	    {Plain, CompressionS1} = ssl_record:uncompress(CompAlg,
+							   PlainFragment, CompressionS0),
+	    ConnnectionStates = ConnnectionStates0#{
+				  current_read => ReadState0#{
+                                                    cipher_state => CipherS1,
+                                                    sequence_number => Seq + 1,
+                                                    compression_state => CompressionS1}},
+	    {CipherText#ssl_tls{fragment = Plain}, ConnnectionStates};
+	#alert{} = Alert ->
+	    Alert
+    end;
+
+decode_cipher_text(#ssl_tls{type = Type, version = Version,
+			    fragment = CipherFragment} = CipherText,
+		   #{current_read :=
+			 #{compression_state := CompressionS0,
+			   sequence_number := Seq,
+			   security_parameters :=
+			       #security_parameters{compression_algorithm = CompAlg}
+			  } = ReadState0} = ConnnectionStates0, PaddingCheck) ->
+    case ssl_record:decipher(Version, CipherFragment, ReadState0, PaddingCheck) of
+	{PlainFragment, Mac, ReadState1} ->
+	    MacHash = ssl_cipher:calc_mac_hash(Type, Version, PlainFragment, ReadState1),
+	    case ssl_record:is_correct_mac(Mac, MacHash) of
+		true ->
+		    {Plain, CompressionS1} = ssl_record:uncompress(CompAlg,
+								   PlainFragment, CompressionS0),
+		    ConnnectionStates = ConnnectionStates0#{
+					  current_read => ReadState1#{
+							    sequence_number => Seq + 1,
+							    compression_state => CompressionS1}},
+		    {CipherText#ssl_tls{fragment = Plain}, ConnnectionStates};
+		false ->
+			?ALERT_REC(?FATAL, ?BAD_RECORD_MAC)
+	    end;
+	    #alert{} = Alert ->
+	    Alert
+    end.
+
+%%====================================================================
+%% Protocol version handling
+%%====================================================================
 
 %%--------------------------------------------------------------------
 -spec protocol_version(tls_atom_version() | tls_version()) -> 
@@ -278,11 +358,6 @@ supported_protocol_versions([_|_] = Vsns) ->
 	    end
     end.
 
-%%--------------------------------------------------------------------
-%%     
-%% Description: ssl version 2 is not acceptable security risks are too big.
-%% 
-%%--------------------------------------------------------------------
 -spec is_acceptable_version(tls_version()) -> boolean().
 is_acceptable_version({N,_}) 
   when N >= ?LOWEST_MAJOR_SUPPORTED_VERSION ->
@@ -302,6 +377,7 @@ hello_version(Version, _) when Version >= {3, 3} ->
     Version;
 hello_version(_, Versions) ->
     lowest_protocol_version(Versions).
+
 %%--------------------------------------------------------------------
 %%% Internal functions
 %%--------------------------------------------------------------------
@@ -318,6 +394,9 @@ initial_connection_state(ConnectionEnd, BeastMitigation) ->
       server_verify_data => undefined
      }.
 
+assert_version(<<?BYTE(_), ?BYTE(MajVer), ?BYTE(MinVer), _/binary>>, Versions) ->
+    is_acceptable_version({MajVer, MinVer}, Versions).
+                   
 get_tls_records_aux(<<?BYTE(?APPLICATION_DATA),?BYTE(MajVer),?BYTE(MinVer),
 		     ?UINT16(Length), Data:Length/binary, Rest/binary>>, 
 		    Acc) ->
@@ -342,33 +421,10 @@ get_tls_records_aux(<<?BYTE(?CHANGE_CIPHER_SPEC),?BYTE(MajVer),?BYTE(MinVer),
     get_tls_records_aux(Rest, [#ssl_tls{type = ?CHANGE_CIPHER_SPEC,
 					version = {MajVer, MinVer},
 					fragment = Data} | Acc]);
-%% Matches an ssl v2 client hello message.
-%% The server must be able to receive such messages, from clients that
-%% are willing to use ssl v3 or higher, but have ssl v2 compatibility.
-get_tls_records_aux(<<1:1, Length0:15, Data0:Length0/binary, Rest/binary>>,
-		    Acc) ->
-    case Data0 of
-	<<?BYTE(?CLIENT_HELLO), ?BYTE(MajVer), ?BYTE(MinVer), _/binary>> ->
-	    Length = Length0-1,
-	    <<?BYTE(_), Data1:Length/binary>> = Data0,
-	    Data = <<?BYTE(?CLIENT_HELLO), ?UINT24(Length), Data1/binary>>,
-	    get_tls_records_aux(Rest, [#ssl_tls{type = ?HANDSHAKE,
-						version = {MajVer, MinVer},
-						fragment = Data} | Acc]);
-	_ ->
-	    ?ALERT_REC(?FATAL, ?HANDSHAKE_FAILURE)
-	    
-    end;
-
 get_tls_records_aux(<<0:1, _CT:7, ?BYTE(_MajVer), ?BYTE(_MinVer),
-                     ?UINT16(Length), _/binary>>,
+                      ?UINT16(Length), _/binary>>,
                     _Acc) when Length > ?MAX_CIPHER_TEXT_LENGTH ->
     ?ALERT_REC(?FATAL, ?RECORD_OVERFLOW);
-
-get_tls_records_aux(<<1:1, Length0:15, _/binary>>,_Acc) 
-  when Length0 > ?MAX_CIPHER_TEXT_LENGTH ->
-    ?ALERT_REC(?FATAL, ?RECORD_OVERFLOW);
-
 get_tls_records_aux(Data, Acc) ->
     case size(Data) =< ?MAX_CIPHER_TEXT_LENGTH + ?INITIAL_BYTES of
 	true ->
@@ -376,37 +432,17 @@ get_tls_records_aux(Data, Acc) ->
 	false ->
 	    ?ALERT_REC(?FATAL, ?UNEXPECTED_MESSAGE)
 	end.
-
+%%--------------------------------------------------------------------
 encode_plain_text(Type, Version, Data, #{current_write := Write0} = ConnectionStates) ->
     {CipherFragment, Write1} = do_encode_plain_text(Type, Version, Data, Write0),
     {CipherText, Write} = encode_tls_cipher_text(Type, Version, CipherFragment, Write1),
     {CipherText, ConnectionStates#{current_write => Write}}.
 
-lowest_list_protocol_version(Ver, []) ->
-    Ver;
-lowest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
-    lowest_list_protocol_version(lowest_protocol_version(Ver1, Ver2), Rest).
-
-highest_list_protocol_version(Ver, []) ->
-    Ver;
-highest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
-    highest_list_protocol_version(highest_protocol_version(Ver1, Ver2), Rest).
-
 encode_tls_cipher_text(Type, {MajVer, MinVer}, Fragment, #{sequence_number := Seq} = Write) ->
     Length = erlang:iolist_size(Fragment),
     {[<<?BYTE(Type), ?BYTE(MajVer), ?BYTE(MinVer), ?UINT16(Length)>>, Fragment],
      Write#{sequence_number => Seq +1}}.
 
-highest_protocol_version() ->
-    highest_protocol_version(supported_protocol_versions()).
-
-lowest_protocol_version() ->
-    lowest_protocol_version(supported_protocol_versions()).
-
-sufficient_tlsv1_2_crypto_support() ->
-    CryptoSupport = crypto:supports(),
-    proplists:get_bool(sha256, proplists:get_value(hashs, CryptoSupport)).
-
 encode_iolist(Type, Data, Version, ConnectionStates0) ->
     {ConnectionStates, EncodedMsg} =
         lists:foldl(fun(Text, {CS0, Encoded}) ->
@@ -415,6 +451,31 @@ encode_iolist(Type, Data, Version, ConnectionStates0) ->
 			    {CS1, [Enc | Encoded]}
 		    end, {ConnectionStates0, []}, Data),
     {lists:reverse(EncodedMsg), ConnectionStates}.
+%%--------------------------------------------------------------------
+do_encode_plain_text(Type, Version, Data, #{compression_state := CompS0,
+					 security_parameters :=
+					     #security_parameters{
+						cipher_type = ?AEAD,
+						compression_algorithm = CompAlg}
+					} = WriteState0) ->
+    {Comp, CompS1} = ssl_record:compress(CompAlg, Data, CompS0),
+    WriteState1 = WriteState0#{compression_state => CompS1},
+    AAD = calc_aad(Type, Version, WriteState1),
+    ssl_record:cipher_aead(Version, Comp, WriteState1, AAD);
+do_encode_plain_text(Type, Version, Data, #{compression_state := CompS0,
+					 security_parameters :=
+					     #security_parameters{compression_algorithm = CompAlg}
+					}= WriteState0) ->
+    {Comp, CompS1} = ssl_record:compress(CompAlg, Data, CompS0),
+    WriteState1 = WriteState0#{compression_state => CompS1},
+    MacHash = ssl_cipher:calc_mac_hash(Type, Version, Comp, WriteState1),
+    ssl_record:cipher(Version, Comp, WriteState1, MacHash);
+do_encode_plain_text(_,_,_,CS) ->
+    exit({cs, CS}).
+%%--------------------------------------------------------------------
+calc_aad(Type, {MajVer, MinVer},
+	 #{sequence_number := SeqNo}) ->
+    <<?UINT64(SeqNo), ?BYTE(Type), ?BYTE(MajVer), ?BYTE(MinVer)>>.
 
 %% 1/n-1 splitting countermeasure Rizzo/Duong-Beast, RC4 chiphers are
 %% not vulnerable to this attack.
@@ -440,89 +501,25 @@ do_split_bin(Bin, ChunkSize, Acc) ->
         _ ->
             lists:reverse(Acc, [Bin])
     end.
-
 %%--------------------------------------------------------------------
--spec decode_cipher_text(#ssl_tls{}, ssl_record:connection_states(), boolean()) ->
-				{#ssl_tls{}, ssl_record:connection_states()}| #alert{}.
-%%
-%% Description: Decode cipher text
-%%--------------------------------------------------------------------
-decode_cipher_text(#ssl_tls{type = Type, version = Version,
-			    fragment = CipherFragment} = CipherText,
-		   #{current_read :=
-			 #{compression_state := CompressionS0,
-			   sequence_number := Seq,
-                           cipher_state := CipherS0,
-			   security_parameters :=
-			       #security_parameters{
-				  cipher_type = ?AEAD,
-                                  bulk_cipher_algorithm =
-                                      BulkCipherAlgo,
-				  compression_algorithm = CompAlg}
-			  } = ReadState0} = ConnnectionStates0, _) ->
-    AAD = calc_aad(Type, Version, ReadState0),
-    case ssl_cipher:decipher_aead(BulkCipherAlgo, CipherS0, Seq, AAD, CipherFragment, Version) of
-	{PlainFragment, CipherS1} ->
-	    {Plain, CompressionS1} = ssl_record:uncompress(CompAlg,
-							   PlainFragment, CompressionS0),
-	    ConnnectionStates = ConnnectionStates0#{
-				  current_read => ReadState0#{
-                                                    cipher_state => CipherS1,
-                                                    sequence_number => Seq + 1,
-                                                    compression_state => CompressionS1}},
-	    {CipherText#ssl_tls{fragment = Plain}, ConnnectionStates};
-	#alert{} = Alert ->
-	    Alert
-    end;
+lowest_list_protocol_version(Ver, []) ->
+    Ver;
+lowest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
+    lowest_list_protocol_version(lowest_protocol_version(Ver1, Ver2), Rest).
 
-decode_cipher_text(#ssl_tls{type = Type, version = Version,
-			    fragment = CipherFragment} = CipherText,
-		   #{current_read :=
-			 #{compression_state := CompressionS0,
-			   sequence_number := Seq,
-			   security_parameters :=
-			       #security_parameters{compression_algorithm = CompAlg}
-			  } = ReadState0} = ConnnectionStates0, PaddingCheck) ->
-    case ssl_record:decipher(Version, CipherFragment, ReadState0, PaddingCheck) of
-	{PlainFragment, Mac, ReadState1} ->
-	    MacHash = ssl_cipher:calc_mac_hash(Type, Version, PlainFragment, ReadState1),
-	    case ssl_record:is_correct_mac(Mac, MacHash) of
-		true ->
-		    {Plain, CompressionS1} = ssl_record:uncompress(CompAlg,
-								   PlainFragment, CompressionS0),
-		    ConnnectionStates = ConnnectionStates0#{
-					  current_read => ReadState1#{
-							    sequence_number => Seq + 1,
-							    compression_state => CompressionS1}},
-		    {CipherText#ssl_tls{fragment = Plain}, ConnnectionStates};
-		false ->
-			?ALERT_REC(?FATAL, ?BAD_RECORD_MAC)
-	    end;
-	    #alert{} = Alert ->
-	    Alert
-    end.
+highest_list_protocol_version(Ver, []) ->
+    Ver;
+highest_list_protocol_version(Ver1,  [Ver2 | Rest]) ->
+    highest_list_protocol_version(highest_protocol_version(Ver1, Ver2), Rest).
+
+highest_protocol_version() ->
+    highest_protocol_version(supported_protocol_versions()).
+
+lowest_protocol_version() ->
+    lowest_protocol_version(supported_protocol_versions()).
+
+sufficient_tlsv1_2_crypto_support() ->
+    CryptoSupport = crypto:supports(),
+    proplists:get_bool(sha256, proplists:get_value(hashs, CryptoSupport)).
 
-do_encode_plain_text(Type, Version, Data, #{compression_state := CompS0,
-					 security_parameters :=
-					     #security_parameters{
-						cipher_type = ?AEAD,
-						compression_algorithm = CompAlg}
-					} = WriteState0) ->
-    {Comp, CompS1} = ssl_record:compress(CompAlg, Data, CompS0),
-    WriteState1 = WriteState0#{compression_state => CompS1},
-    AAD = calc_aad(Type, Version, WriteState1),
-    ssl_record:cipher_aead(Version, Comp, WriteState1, AAD);
-do_encode_plain_text(Type, Version, Data, #{compression_state := CompS0,
-					 security_parameters :=
-					     #security_parameters{compression_algorithm = CompAlg}
-					}= WriteState0) ->
-    {Comp, CompS1} = ssl_record:compress(CompAlg, Data, CompS0),
-    WriteState1 = WriteState0#{compression_state => CompS1},
-    MacHash = ssl_cipher:calc_mac_hash(Type, Version, Comp, WriteState1),
-    ssl_record:cipher(Version, Comp, WriteState1, MacHash);
-do_encode_plain_text(_,_,_,CS) ->
-    exit({cs, CS}).
 
-calc_aad(Type, {MajVer, MinVer},
-	 #{sequence_number := SeqNo}) ->
-    <<?UINT64(SeqNo), ?BYTE(Type), ?BYTE(MajVer), ?BYTE(MinVer)>>.
diff --git a/lib/ssl/src/tls_socket.erl b/lib/ssl/src/tls_socket.erl
index e76d9c100a..453a908401 100644
--- a/lib/ssl/src/tls_socket.erl
+++ b/lib/ssl/src/tls_socket.erl
@@ -27,7 +27,7 @@
 -export([send/3, listen/3, accept/3, socket/5, connect/4, upgrade/3,
 	 setopts/3, getopts/3, getstat/3, peername/2, sockname/2, port/2]).
 -export([split_options/1, get_socket_opts/3]).
--export([emulated_options/0, internal_inet_values/0, default_inet_values/0,
+-export([emulated_options/0, emulated_options/1, internal_inet_values/0, default_inet_values/0,
 	 init/1, start_link/3, terminate/2, inherit_tracker/3, 
 	 emulated_socket_options/2, get_emulated_opts/1, 
 	 set_emulated_opts/2, get_all_opts/1, handle_call/3, handle_cast/2,
@@ -170,6 +170,9 @@ port(Transport, Socket) ->
 emulated_options() ->
     [mode, packet, active, header, packet_size].
 
+emulated_options(Opts) ->
+      emulated_options(Opts, internal_inet_values(), default_inet_values()).
+
 internal_inet_values() ->
     [{packet_size,0}, {packet, 0}, {header, 0}, {active, false}, {mode,binary}].
 
@@ -328,3 +331,41 @@ emulated_socket_options(InetValues, #socket_options{
        packet = proplists:get_value(packet, InetValues, Packet),
        packet_size = proplists:get_value(packet_size, InetValues, Size)
       }.
+
+emulated_options([{mode, Value} = Opt |Opts], Inet, Emulated) ->
+    validate_inet_option(mode, Value),
+    emulated_options(Opts, Inet, [Opt | proplists:delete(mode, Emulated)]);
+emulated_options([{header, Value} = Opt | Opts], Inet, Emulated) ->
+    validate_inet_option(header, Value),
+    emulated_options(Opts, Inet,  [Opt | proplists:delete(header, Emulated)]);
+emulated_options([{active, Value} = Opt |Opts], Inet, Emulated) ->
+    validate_inet_option(active, Value),
+    emulated_options(Opts, Inet, [Opt | proplists:delete(active, Emulated)]);
+emulated_options([{packet, Value} = Opt |Opts], Inet, Emulated) ->
+    validate_inet_option(packet, Value),
+    emulated_options(Opts, Inet, [Opt | proplists:delete(packet, Emulated)]);
+emulated_options([{packet_size, Value} = Opt | Opts], Inet, Emulated) ->
+    validate_inet_option(packet_size, Value),
+    emulated_options(Opts, Inet, [Opt | proplists:delete(packet_size, Emulated)]);
+emulated_options([Opt|Opts], Inet, Emulated) ->
+    emulated_options(Opts, [Opt|Inet], Emulated);
+emulated_options([], Inet,Emulated) ->
+    {Inet, Emulated}.
+
+validate_inet_option(mode, Value)
+  when Value =/= list, Value =/= binary ->
+    throw({error, {options, {mode,Value}}});
+validate_inet_option(packet, Value)
+  when not (is_atom(Value) orelse is_integer(Value)) ->
+    throw({error, {options, {packet,Value}}});
+validate_inet_option(packet_size, Value)
+  when not is_integer(Value) ->
+    throw({error, {options, {packet_size,Value}}});
+validate_inet_option(header, Value)
+  when not is_integer(Value) ->
+    throw({error, {options, {header,Value}}});
+validate_inet_option(active, Value)
+  when Value =/= true, Value =/= false, Value =/= once ->
+    throw({error, {options, {active,Value}}});
+validate_inet_option(_, _) ->
+    ok.
diff --git a/lib/ssl/src/tls_v1.erl b/lib/ssl/src/tls_v1.erl
index a8fe119bf8..a31ab8d044 100644
--- a/lib/ssl/src/tls_v1.erl
+++ b/lib/ssl/src/tls_v1.erl
@@ -202,23 +202,13 @@ suites(Minor) when Minor == 1; Minor == 2 ->
       ?TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
       ?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA,
       ?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA,
-      ?TLS_RSA_WITH_AES_256_CBC_SHA,
 
       ?TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
       ?TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
       ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
       ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
       ?TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,
-      ?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,
-      ?TLS_RSA_WITH_AES_128_CBC_SHA,
-
-      ?TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
-      ?TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
-      ?TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
-      ?TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA,
-      ?TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
-      ?TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,
-      ?TLS_RSA_WITH_3DES_EDE_CBC_SHA
+      ?TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
     ];
 suites(3) ->
     [?TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
@@ -230,16 +220,10 @@ suites(3) ->
      ?TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384,
      ?TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384,
 
-     ?TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
-     ?TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
-     ?TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
-
      ?TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
      ?TLS_DHE_DSS_WITH_AES_256_GCM_SHA384,
      ?TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
      ?TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,
-     ?TLS_RSA_WITH_AES_256_GCM_SHA384,
-     ?TLS_RSA_WITH_AES_256_CBC_SHA256,
 
      ?TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
      ?TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
@@ -253,9 +237,7 @@ suites(3) ->
      ?TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
      ?TLS_DHE_DSS_WITH_AES_128_GCM_SHA256,
      ?TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
-     ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,
-     ?TLS_RSA_WITH_AES_128_GCM_SHA256,
-     ?TLS_RSA_WITH_AES_128_CBC_SHA256
+     ?TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
 
      %% not supported
      %% ?TLS_DH_RSA_WITH_AES_256_GCM_SHA384,
@@ -264,8 +246,6 @@ suites(3) ->
      %% ?TLS_DH_DSS_WITH_AES_128_GCM_SHA256
     ] ++ suites(2).
 
-
-
 signature_algs({3, 3}, HashSigns) ->
     CryptoSupports =  crypto:supports(),
     Hashes = proplists:get_value(hashs, CryptoSupports),
diff --git a/lib/ssl/test/Makefile b/lib/ssl/test/Makefile
index c7e2f402af..9347b56f39 100644
--- a/lib/ssl/test/Makefile
+++ b/lib/ssl/test/Makefile
@@ -37,6 +37,8 @@ VSN=$(GS_VSN)
 
 MODULES = \
 	ssl_test_lib \
+	ssl_bench_test_lib \
+	ssl_dist_test_lib \
 	ssl_alpn_handshake_SUITE \
 	ssl_basic_SUITE \
 	ssl_bench_SUITE \
@@ -44,6 +46,8 @@ MODULES = \
 	ssl_certificate_verify_SUITE\
 	ssl_crl_SUITE\
 	ssl_dist_SUITE \
+	ssl_dist_bench_SUITE \
+	ssl_engine_SUITE\
 	ssl_handshake_SUITE \
 	ssl_npn_hello_SUITE \
 	ssl_npn_handshake_SUITE \
@@ -61,7 +65,8 @@ MODULES = \
 
 ERL_FILES = $(MODULES:%=%.erl)
 
-HRL_FILES =
+HRL_FILES = \
+	ssl_dist_test_lib.hrl
 
 HRL_FILES_SRC = \
 	ssl_api.hrl\
diff --git a/lib/ssl/test/ssl.spec b/lib/ssl/test/ssl.spec
index 0ad94e22bc..cb54168d36 100644
--- a/lib/ssl/test/ssl.spec
+++ b/lib/ssl/test/ssl.spec
@@ -1,5 +1,4 @@
 {suites,"../ssl_test",all}.
-{skip_cases, "../ssl_test",
-    ssl_bench_SUITE, [setup_sequential, setup_concurrent, payload_simple,
-	use_pem_cache, bypass_pem_cache],
-    "Benchmarks run separately"}.
+{skip_suites, "../ssl_test",
+     [ssl_bench_SUITE, ssl_dist_bench_SUITE],
+     "Benchmarks run separately"}.
diff --git a/lib/ssl/test/ssl_basic_SUITE.erl b/lib/ssl/test/ssl_basic_SUITE.erl
index 3b4ca40058..a9901007db 100644
--- a/lib/ssl/test/ssl_basic_SUITE.erl
+++ b/lib/ssl/test/ssl_basic_SUITE.erl
@@ -163,7 +163,8 @@ api_tests() ->
      server_name_indication_option,
      accept_pool,
      prf,
-     socket_options
+     socket_options,
+     cipher_suites
     ].
 
 api_tests_tls() ->
@@ -193,6 +194,7 @@ renegotiate_tests() ->
     [client_renegotiate,
      server_renegotiate,
      client_secure_renegotiate,
+     client_secure_renegotiate_fallback,
      client_renegotiate_reused_session,
      server_renegotiate_reused_session,
      client_no_wrap_sequence_number,
@@ -207,12 +209,14 @@ tls_cipher_tests() ->
      rc4_ecdsa_cipher_suites].
 
 cipher_tests() ->
-    [cipher_suites,
+    [old_cipher_suites,
      cipher_suites_mix,
      ciphers_rsa_signed_certs,
      ciphers_rsa_signed_certs_openssl_names,
      ciphers_dsa_signed_certs,
      ciphers_dsa_signed_certs_openssl_names,
+     chacha_rsa_cipher_suites,
+     chacha_ecdsa_cipher_suites,
      anonymous_cipher_suites,
      psk_cipher_suites,
      psk_with_hint_cipher_suites,
@@ -280,8 +284,11 @@ end_per_suite(_Config) ->
 
 init_per_group(GroupName, Config) when GroupName == basic_tls;
                                        GroupName == options_tls;
+                                       GroupName == options;
                                        GroupName == basic;
-                                       GroupName == options ->
+                                       GroupName == session;
+                                       GroupName == error_handling_tests_tls
+                                       ->
     ssl_test_lib:clean_tls_version(Config);                          
 init_per_group(GroupName, Config) ->
     case ssl_test_lib:is_tls_version(GroupName) andalso ssl_test_lib:sufficient_crypto_support(GroupName) of
@@ -381,12 +388,12 @@ init_per_testcase(TestCase, Config) when TestCase == psk_cipher_suites;
 					 TestCase == anonymous_cipher_suites;
 					 TestCase == psk_anon_cipher_suites;
 					 TestCase == psk_anon_with_hint_cipher_suites;
-                                         TestCase == srp_cipher_suites,
-                                         TestCase == srp_anon_cipher_suites,
-                                         TestCase == srp_dsa_cipher_suites,
-                                         TestCase == des_rsa_cipher_suites,
-                                         TestCase == des_ecdh_rsa_cipher_suites,
-					 TestCase == versions_option,
+                                         TestCase == srp_cipher_suites;
+                                         TestCase == srp_anon_cipher_suites;
+                                         TestCase == srp_dsa_cipher_suites;
+                                         TestCase == des_rsa_cipher_suites;
+                                         TestCase == des_ecdh_rsa_cipher_suites;
+					 TestCase == versions_option;
 					 TestCase == tls_tcp_connect_big ->
     ssl_test_lib:ct_log_supported_protocol_versions(Config),
     ct:timetrap({seconds, 60}),
@@ -427,6 +434,12 @@ init_per_testcase(rizzo_disabled, Config) ->
     ct:timetrap({seconds, 60}),
     rizzo_add_mitigation_option(disabled, Config);
 
+init_per_testcase(TestCase, Config) when TestCase == no_reuses_session_server_restart_new_cert_file;
+                                         TestCase == no_reuses_session_server_restart_new_cert ->
+    ct:log("TLS/SSL version ~p~n ", [tls_record:supported_protocol_versions()]),
+    ct:timetrap({seconds, 15}),
+    Config;
+
 init_per_testcase(prf, Config) ->
     ct:log("TLS/SSL version ~p~n ", [tls_record:supported_protocol_versions()]),
     ct:timetrap({seconds, 40}),
@@ -655,7 +668,7 @@ connection_info(Config) when is_list(Config) ->
 			   {from, self()}, 
 			   {mfa, {?MODULE, connection_info_result, []}},
 			   {options, 
-			    [{ciphers,[{rsa, aes_128_cbc, sha}]} | 
+			    [{ciphers,[{dhe_rsa, aes_128_cbc, sha}]} | 
 			     ClientOpts]}]),
     
     ct:log("Testcase ~p, Client ~p  Server ~p ~n",
@@ -663,7 +676,7 @@ connection_info(Config) when is_list(Config) ->
 
     Version = ssl_test_lib:protocol_version(Config),
     
-    ServerMsg = ClientMsg = {ok, {Version, {rsa, aes_128_cbc, sha}}},
+    ServerMsg = ClientMsg = {ok, {Version, {dhe_rsa, aes_128_cbc, sha}}},
 			   
     ssl_test_lib:check_result(Server, ServerMsg, Client, ClientMsg),
     
@@ -693,8 +706,6 @@ secret_connection_info(Config) when is_list(Config) ->
     
     ct:log("Testcase ~p, Client ~p  Server ~p ~n",
 		       [self(), Client, Server]),
-
-    Version = ssl_test_lib:protocol_version(Config),    
 			   
     ssl_test_lib:check_result(Server, true, Client, true),
     
@@ -1119,11 +1130,16 @@ fallback(Config) when is_list(Config) ->
 
 %%--------------------------------------------------------------------
 cipher_format() ->
-    [{doc, "Test that cipher conversion from tuples to binarys works"}].
+    [{doc, "Test that cipher conversion from maps | tuples | stings to binarys works"}].
 cipher_format(Config) when is_list(Config) ->
-    {ok, Socket} = ssl:listen(0, [{ciphers, ssl:cipher_suites()}]),
-    ssl:close(Socket).
-
+    {ok, Socket0} = ssl:listen(0, [{ciphers, ssl:cipher_suites(default, 'tlsv1.2')}]),
+    ssl:close(Socket0),
+    %% Legacy
+    {ok, Socket1} = ssl:listen(0, [{ciphers, ssl:cipher_suites()}]),
+    ssl:close(Socket1),
+    {ok, Socket2} = ssl:listen(0, [{ciphers, ssl:cipher_suites(openssl)}]),
+    ssl:close(Socket2).
+   
 %%--------------------------------------------------------------------
 
 peername() ->
@@ -1274,22 +1290,83 @@ sockname_result(S) ->
     ssl:sockname(S).
 
 %%--------------------------------------------------------------------
+
 cipher_suites() ->
-    [{doc,"Test API function cipher_suites/0"}].
+    [{doc,"Test API function cipher_suites/2, filter_cipher_suites/2"
+      " and prepend|append_cipher_suites/2"}].
 
 cipher_suites(Config) when is_list(Config) -> 
-    MandatoryCipherSuite = {rsa,'3des_ede_cbc',sha},
+    MandatoryCipherSuiteTLS1_0TLS1_1 = #{key_exchange => rsa,
+                                         cipher => '3des_ede_cbc',
+                                         mac => sha,
+                                         prf => default_prf},
+    MandatoryCipherSuiteTLS1_0TLS1_2 = #{key_exchange =>rsa,
+                                         cipher => 'aes_128_cbc',
+                                         mac => sha,
+                                         prf => default_prf}, 
+    Version = ssl_test_lib:protocol_version(Config),
+    All = [_|_] = ssl:cipher_suites(all, Version),
+    Default = [_|_] = ssl:cipher_suites(default, Version),
+    Anonymous = [_|_] = ssl:cipher_suites(anonymous, Version),
+    true = length(Default) < length(All),
+    Filters = [{key_exchange, 
+                fun(dhe_rsa) -> 
+                        true;
+                   (_) -> 
+                        false
+                end
+               }, 
+               {cipher, 
+                fun(aes_256_cbc) ->
+                        true;
+                   (_) -> 
+                        false
+                end
+               },
+               {mac, 
+                fun(sha) ->
+                        true;
+                   (_) -> 
+                        false
+                end
+               }
+              ],
+    Cipher = #{cipher => aes_256_cbc,
+               key_exchange => dhe_rsa,
+               mac => sha,
+               prf => default_prf},
+    [Cipher] = ssl:filter_cipher_suites(All, Filters),    
+    [Cipher | Rest0] = ssl:prepend_cipher_suites([Cipher], Default),
+    [Cipher | Rest0] = ssl:prepend_cipher_suites(Filters, Default),
+    true = lists:member(Cipher, Default), 
+    false = lists:member(Cipher, Rest0), 
+    [Cipher | Rest1] = lists:reverse(ssl:append_cipher_suites([Cipher], Default)),
+    [Cipher | Rest1] = lists:reverse(ssl:append_cipher_suites(Filters, Default)),
+    true = lists:member(Cipher, Default),
+    false = lists:member(Cipher, Rest1),
+    [] = lists:dropwhile(fun(X) -> not lists:member(X, Default) end, Anonymous),
+    [] = lists:dropwhile(fun(X) -> not lists:member(X, All) end, Anonymous),        
+    true = lists:member(MandatoryCipherSuiteTLS1_0TLS1_1, All),
+    true = lists:member(MandatoryCipherSuiteTLS1_0TLS1_2, All).
+
+%%--------------------------------------------------------------------
+
+old_cipher_suites() ->
+    [{doc,"Test API function cipher_suites/0"}].
+
+old_cipher_suites(Config) when is_list(Config) -> 
+    MandatoryCipherSuite = {rsa, '3des_ede_cbc', sha},
     [_|_] = Suites = ssl:cipher_suites(),
-    true = lists:member(MandatoryCipherSuite, Suites),
     Suites = ssl:cipher_suites(erlang),
-    [_|_] =ssl:cipher_suites(openssl).
+    [_|_] = ssl:cipher_suites(openssl),
+    true = lists:member(MandatoryCipherSuite,  ssl:cipher_suites(all)).
 
 %%--------------------------------------------------------------------
 cipher_suites_mix() ->
     [{doc,"Test to have old and new cipher suites at the same time"}].
 
 cipher_suites_mix(Config) when is_list(Config) -> 
-    CipherSuites = [{ecdh_rsa,aes_128_cbc,sha256,sha256}, {rsa,aes_128_cbc,sha}],
+    CipherSuites = [{dhe_rsa,aes_128_cbc,sha256,sha256}, {dhe_rsa,aes_128_cbc,sha}],
     ClientOpts = ssl_test_lib:ssl_options(client_verification_opts, Config),
     ServerOpts = ssl_test_lib:ssl_options(server_verification_opts, Config),
 
@@ -2357,7 +2434,24 @@ ciphers_dsa_signed_certs_openssl_names() ->
 ciphers_dsa_signed_certs_openssl_names(Config) when is_list(Config) ->
     Ciphers = ssl_test_lib:openssl_dsa_suites(),
     run_suites(Ciphers, Config, dsa).
+
 %%-------------------------------------------------------------------
+chacha_rsa_cipher_suites()->
+    [{doc,"Test the cacha with  ECDSA signed certs ciphersuites"}].
+chacha_rsa_cipher_suites(Config) when is_list(Config) ->
+    NVersion = ssl_test_lib:protocol_version(Config, tuple),
+    Ciphers = [S || {KeyEx,_,_} = S <- ssl_test_lib:chacha_suites(NVersion),
+                    KeyEx == ecdhe_rsa, KeyEx == dhe_rsa],
+    run_suites(Ciphers, Config, chacha_ecdsa).
+
+%%-------------------------------------------------------------------
+chacha_ecdsa_cipher_suites()->
+    [{doc,"Test the cacha with  ECDSA signed certs ciphersuites"}].
+chacha_ecdsa_cipher_suites(Config) when is_list(Config) ->
+    NVersion = ssl_test_lib:protocol_version(Config, tuple),
+    Ciphers = [S || {ecdhe_ecdsa,_,_} = S <- ssl_test_lib:chacha_suites(NVersion)],
+    run_suites(Ciphers, Config, chacha_rsa).
+%%-----------------------------------------------------------------
 anonymous_cipher_suites()->
     [{doc,"Test the anonymous ciphersuites"}].
 anonymous_cipher_suites(Config) when is_list(Config) ->
@@ -2437,14 +2531,15 @@ rc4_ecdsa_cipher_suites(Config) when is_list(Config) ->
 des_rsa_cipher_suites()->
     [{doc, "Test the des_rsa ciphersuites"}].
 des_rsa_cipher_suites(Config) when is_list(Config) ->
-    Ciphers = ssl_test_lib:des_suites(Config),
+    NVersion = tls_record:highest_protocol_version([]),
+    Ciphers = [S || {rsa,_,_} = S <- ssl_test_lib:des_suites(NVersion)],
     run_suites(Ciphers, Config, des_rsa).
 %-------------------------------------------------------------------
 des_ecdh_rsa_cipher_suites()->
     [{doc, "Test ECDH rsa signed ciphersuites"}].
 des_ecdh_rsa_cipher_suites(Config) when is_list(Config) ->
     NVersion = ssl_test_lib:protocol_version(Config, tuple),
-    Ciphers = ssl_test_lib:des_suites(NVersion),
+    Ciphers = [S || {dhe_rsa,_,_} = S <- ssl_test_lib:des_suites(NVersion)],
     run_suites(Ciphers, Config, des_dhe_rsa).
 
 %%--------------------------------------------------------------------
@@ -2804,6 +2899,36 @@ client_secure_renegotiate(Config) when is_list(Config) ->
     ssl_test_lib:close(Server),
     ssl_test_lib:close(Client).
 
+%%--------------------------------------------------------------------
+client_secure_renegotiate_fallback() ->
+    [{doc,"Test that we can set secure_renegotiate to false that is "
+      "fallback option, we however do not have a insecure server to test against!"}].
+client_secure_renegotiate_fallback(Config) when is_list(Config) ->
+    ServerOpts = ssl_test_lib:ssl_options(server_opts, Config),
+    ClientOpts = ssl_test_lib:ssl_options(client_opts, Config),
+
+    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+    Data = "From erlang to erlang",
+
+    Server =
+	ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+				   {from, self()},
+				   {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
+				   {options, [{secure_renegotiate, false} | ServerOpts]}]),
+    Port = ssl_test_lib:inet_port(Server),
+
+    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+					{host, Hostname},
+					{from, self()},
+					{mfa, {?MODULE,
+					       renegotiate, [Data]}},
+					{options, [{reuse_sessions, false},
+						   {secure_renegotiate, false}| ClientOpts]}]),
+    
+    ssl_test_lib:check_result(Client, ok, Server, ok),
+    ssl_test_lib:close(Server),
+    ssl_test_lib:close(Client).
 
 %%--------------------------------------------------------------------
 server_renegotiate() ->
@@ -3137,18 +3262,25 @@ no_reuses_session_server_restart_new_cert_file(Config) when is_list(Config) ->
 
 %%--------------------------------------------------------------------
 defaults(Config) when is_list(Config)->
-    [_, 
-     {supported, Supported},
-     {available, Available}]
-	= ssl:versions(),
-    true = lists:member(sslv3, Available),
-    false = lists:member(sslv3, Supported),
+    Versions = ssl:versions(),
+    true = lists:member(sslv3, proplists:get_value(available, Versions)),
+    false = lists:member(sslv3,  proplists:get_value(supported, Versions)),
+    true = lists:member('tlsv1', proplists:get_value(available, Versions)),
+    true = lists:member('tlsv1',  proplists:get_value(supported, Versions)),
+    true = lists:member('tlsv1.1', proplists:get_value(available, Versions)),
+    true = lists:member('tlsv1.1',  proplists:get_value(supported, Versions)),
+    true = lists:member('tlsv1.2', proplists:get_value(available, Versions)),
+    true = lists:member('tlsv1.2',  proplists:get_value(supported, Versions)),    
     false = lists:member({rsa,rc4_128,sha}, ssl:cipher_suites()),
     true = lists:member({rsa,rc4_128,sha}, ssl:cipher_suites(all)),
     false = lists:member({rsa,des_cbc,sha}, ssl:cipher_suites()),
     true = lists:member({rsa,des_cbc,sha}, ssl:cipher_suites(all)),
     false = lists:member({dhe_rsa,des_cbc,sha}, ssl:cipher_suites()),
-    true = lists:member({dhe_rsa,des_cbc,sha}, ssl:cipher_suites(all)).
+    true = lists:member({dhe_rsa,des_cbc,sha}, ssl:cipher_suites(all)),
+    true = lists:member('dtlsv1.2', proplists:get_value(available_dtls, Versions)),
+    true = lists:member('dtlsv1', proplists:get_value(available_dtls, Versions)),
+    true = lists:member('dtlsv1.2', proplists:get_value(supported_dtls, Versions)),
+    true = lists:member('dtlsv1', proplists:get_value(supported_dtls, Versions)).
 
 %%--------------------------------------------------------------------
 reuseaddr() ->
@@ -3234,16 +3366,16 @@ tls_tcp_reuseaddr(Config) when is_list(Config) ->
 honor_server_cipher_order() ->
     [{doc,"Test API honor server cipher order."}].
 honor_server_cipher_order(Config) when is_list(Config) ->
-    ClientCiphers = [{rsa, aes_128_cbc, sha}, {rsa, aes_256_cbc, sha}],
-    ServerCiphers = [{rsa, aes_256_cbc, sha}, {rsa, aes_128_cbc, sha}],
-honor_cipher_order(Config, true, ServerCiphers, ClientCiphers, {rsa, aes_256_cbc, sha}).
+    ClientCiphers = [{dhe_rsa, aes_128_cbc, sha}, {dhe_rsa, aes_256_cbc, sha}],
+    ServerCiphers = [{dhe_rsa, aes_256_cbc, sha}, {dhe_rsa, aes_128_cbc, sha}],
+honor_cipher_order(Config, true, ServerCiphers, ClientCiphers, {dhe_rsa, aes_256_cbc, sha}).
 
 honor_client_cipher_order() ->
     [{doc,"Test API honor server cipher order."}].
 honor_client_cipher_order(Config) when is_list(Config) ->
-    ClientCiphers = [{rsa, aes_128_cbc, sha}, {rsa, aes_256_cbc, sha}],
-    ServerCiphers = [{rsa, aes_256_cbc, sha}, {rsa, aes_128_cbc, sha}],
-honor_cipher_order(Config, false, ServerCiphers, ClientCiphers, {rsa, aes_128_cbc, sha}).
+    ClientCiphers = [{dhe_rsa, aes_128_cbc, sha}, {dhe_rsa, aes_256_cbc, sha}],
+    ServerCiphers = [{dhe_rsa, aes_256_cbc, sha}, {dhe_rsa, aes_128_cbc, sha}],
+honor_cipher_order(Config, false, ServerCiphers, ClientCiphers, {dhe_rsa, aes_128_cbc, sha}).
 
 honor_cipher_order(Config, Honor, ServerCiphers, ClientCiphers, Expected) ->
     ClientOpts = ssl_test_lib:ssl_options(client_opts, Config),
@@ -3299,7 +3431,7 @@ tls_ciphersuite_vs_version(Config) when is_list(Config) ->
 		      >>),
     {ok, <<22, RecMajor:8, RecMinor:8, _RecLen:16, 2, HelloLen:24>>} = gen_tcp:recv(Socket, 9, 10000),
     {ok, <<HelloBin:HelloLen/binary>>} = gen_tcp:recv(Socket, HelloLen, 5000),
-    ServerHello = tls_handshake:decode_handshake({RecMajor, RecMinor}, 2, HelloBin, false),
+    ServerHello = tls_handshake:decode_handshake({RecMajor, RecMinor}, 2, HelloBin),
     case ServerHello of
 	#server_hello{server_version = {3,0}, cipher_suite = <<0,57>>} -> 
 	    ok;
@@ -3759,9 +3891,23 @@ rizzo() ->
     vunrable to Rizzo/Dungon attack"}].
 
 rizzo(Config) when is_list(Config) ->
-    Ciphers  = [X || X ={_,Y,_} <- ssl:cipher_suites(), Y  =/= rc4_128],
     Prop = proplists:get_value(tc_group_properties, Config),
     Version = proplists:get_value(name, Prop),
+    NVersion = ssl_test_lib:protocol_version(Config, tuple),
+    Ciphers  = ssl:filter_cipher_suites(ssl:cipher_suites(all, NVersion),  
+                                        [{key_exchange, 
+                                          fun(Alg) when Alg == ecdh_rsa; Alg == ecdhe_rsa-> 
+                                                  true;
+                                             (_) -> 
+                                                  false 
+                                          end},
+                                         {cipher, 
+                                          fun(rc4_128) -> 
+                                                  false;
+                                             (_) -> 
+                                                  true 
+                                          end}]),
+
     run_send_recv_rizzo(Ciphers, Config, Version,
 			 {?MODULE, send_recv_result_active_rizzo, []}).
 %%--------------------------------------------------------------------
@@ -3773,8 +3919,13 @@ no_rizzo_rc4(Config) when is_list(Config) ->
     Version = proplists:get_value(name, Prop),
     NVersion = ssl_test_lib:protocol_version(Config, tuple),
     %% Test uses RSA certs
-    Ciphers  = ssl_test_lib:rc4_suites(NVersion) -- [{ecdhe_ecdsa,rc4_128,sha},
-                                                     {ecdh_ecdsa,rc4_128,sha}],
+    Ciphers  = ssl:filter_cipher_suites(ssl_test_lib:rc4_suites(NVersion),  
+                                        [{key_exchange, 
+                                          fun(Alg) when Alg == ecdh_rsa; Alg == ecdhe_rsa-> 
+                                                  true;
+                                             (_) -> 
+                                                  false 
+                                          end}]),
     run_send_recv_rizzo(Ciphers, Config, Version,
 			{?MODULE, send_recv_result_active_no_rizzo, []}).
 
@@ -3785,10 +3936,21 @@ rizzo_one_n_minus_one(Config) when is_list(Config) ->
     Prop = proplists:get_value(tc_group_properties, Config),
     Version = proplists:get_value(name, Prop),
     NVersion = ssl_test_lib:protocol_version(Config, tuple),
-    AllSuites = ssl_test_lib:available_suites(NVersion),
-    Ciphers  = [X || X ={_,Y,_} <- AllSuites, Y  =/= rc4_128],
+    Ciphers  = ssl:filter_cipher_suites(ssl:cipher_suites(all, NVersion),
+                                        [{key_exchange, 
+                                          fun(Alg) when Alg == ecdh_rsa; Alg == ecdhe_rsa-> 
+                                                  true;
+                                             (_) -> 
+                                                  false 
+                                          end}, 
+                                         {cipher, 
+                                          fun(rc4_128) ->
+                                                  false;
+                                             (_) -> 
+                                                  true 
+                                          end}]),
     run_send_recv_rizzo(Ciphers, Config, Version,
-			 {?MODULE, send_recv_result_active_rizzo, []}).
+                        {?MODULE, send_recv_result_active_rizzo, []}).
 
 rizzo_zero_n() ->
     [{doc,"Test that the 0/n-split mitigation of Rizzo/Dungon attack can be explicitly selected"}].
@@ -3797,8 +3959,13 @@ rizzo_zero_n(Config) when is_list(Config) ->
     Prop = proplists:get_value(tc_group_properties, Config),
     Version = proplists:get_value(name, Prop),
     NVersion = ssl_test_lib:protocol_version(Config, tuple),
-    AllSuites = ssl_test_lib:available_suites(NVersion),
-    Ciphers  = [X || X ={_,Y,_} <- AllSuites, Y  =/= rc4_128],
+    Ciphers  = ssl:filter_cipher_suites(ssl:cipher_suites(default, NVersion),
+                                        [{cipher, 
+                                          fun(rc4_128) ->
+                                                  false;
+                                             (_) -> 
+                                                  true 
+                                          end}]),
     run_send_recv_rizzo(Ciphers, Config, Version,
 			 {?MODULE, send_recv_result_active_no_rizzo, []}).
 
@@ -3806,9 +3973,16 @@ rizzo_disabled() ->
     [{doc,"Test that the mitigation of Rizzo/Dungon attack can be explicitly disabled"}].
 
 rizzo_disabled(Config) when is_list(Config) ->
-    Ciphers  = [X || X ={_,Y,_} <- ssl:cipher_suites(), Y  =/= rc4_128],
     Prop = proplists:get_value(tc_group_properties, Config),
     Version = proplists:get_value(name, Prop),
+    NVersion = ssl_test_lib:protocol_version(Config, tuple),
+    Ciphers  = ssl:filter_cipher_suites(ssl:cipher_suites(default, NVersion),
+                                        [{cipher, 
+                                          fun(rc4_128) ->
+                                                  false;
+                                             (_) -> 
+                                                  true 
+                                          end}]),
     run_send_recv_rizzo(Ciphers, Config, Version,
 			 {?MODULE, send_recv_result_active_no_rizzo, []}).
 
@@ -4583,55 +4757,58 @@ rizzo_test(Cipher, Config, Version, Mfa) ->
 	    [{Cipher, Error}]
     end.
 
-client_server_opts({KeyAlgo,_,_}, Config)
+client_server_opts(#{key_exchange := KeyAlgo}, Config)
   when KeyAlgo == rsa orelse
        KeyAlgo == dhe_rsa orelse
-       KeyAlgo == ecdhe_rsa ->
+       KeyAlgo == ecdhe_rsa orelse
+       KeyAlgo == rsa_psk orelse
+       KeyAlgo == srp_rsa ->
     {ssl_test_lib:ssl_options(client_opts, Config),
      ssl_test_lib:ssl_options(server_opts, Config)};
-client_server_opts({KeyAlgo,_,_}, Config) when KeyAlgo == dss orelse KeyAlgo == dhe_dss ->
+client_server_opts(#{key_exchange := KeyAlgo}, Config) when KeyAlgo == dss orelse KeyAlgo == dhe_dss ->
     {ssl_test_lib:ssl_options(client_dsa_opts, Config),
      ssl_test_lib:ssl_options(server_dsa_opts, Config)};
-client_server_opts({KeyAlgo,_,_}, Config) when KeyAlgo == ecdh_ecdsa orelse KeyAlgo == ecdhe_ecdsa ->
+client_server_opts(#{key_exchange := KeyAlgo}, Config) when KeyAlgo == ecdh_ecdsa orelse KeyAlgo == ecdhe_ecdsa ->
     {ssl_test_lib:ssl_options(client_opts, Config),
      ssl_test_lib:ssl_options(server_ecdsa_opts, Config)};
-client_server_opts({KeyAlgo,_,_}, Config) when KeyAlgo == ecdh_rsa ->
+client_server_opts(#{key_exchange := KeyAlgo}, Config) when KeyAlgo == ecdh_rsa ->
     {ssl_test_lib:ssl_options(client_opts, Config),
      ssl_test_lib:ssl_options(server_ecdh_rsa_opts, Config)}.
 
 run_suites(Ciphers, Config, Type) ->
-    NVersion = ssl_test_lib:protocol_version(Config, tuple),
     Version = ssl_test_lib:protocol_version(Config),
     ct:log("Running cipher suites ~p~n", [Ciphers]),
     {ClientOpts, ServerOpts} =
 	case Type of
 	    rsa ->
 		{ssl_test_lib:ssl_options(client_verification_opts, Config),
-		 ssl_test_lib:ssl_options(server_verification_opts, Config)};
+                 [{ciphers, Ciphers} |
+                  ssl_test_lib:ssl_options(server_verification_opts, Config)]};
 	    dsa ->
 		{ssl_test_lib:ssl_options(client_verification_opts, Config),
-		 ssl_test_lib:ssl_options(server_dsa_opts, Config)};
+                 [{ciphers, Ciphers} |
+		 ssl_test_lib:ssl_options(server_dsa_opts, Config)]};
 	    anonymous ->
 		%% No certs in opts!
 		{ssl_test_lib:ssl_options(client_verification_opts, Config),
-		 [{reuseaddr, true}, {ciphers, ssl_test_lib:anonymous_suites(NVersion)} |
+		 [{ciphers, Ciphers} |
                   ssl_test_lib:ssl_options([], Config)]};
 	    psk ->
 		{ssl_test_lib:ssl_options(client_psk, Config),
-                 [{ciphers, ssl_test_lib:psk_suites(NVersion)} | 
+                 [{ciphers, Ciphers} | 
                   ssl_test_lib:ssl_options(server_psk, Config)]};
 	    psk_with_hint ->
 		{ssl_test_lib:ssl_options(client_psk, Config),
-		 [{ciphers, ssl_test_lib:psk_suites(NVersion)} |
+		 [{ciphers, Ciphers} |
                   ssl_test_lib:ssl_options(server_psk_hint, Config)
                  ]};
 	    psk_anon ->
 		{ssl_test_lib:ssl_options(client_psk, Config),
-                 [{ciphers, ssl_test_lib:psk_anon_suites(NVersion)} |
+                 [{ciphers, Ciphers} |
                   ssl_test_lib:ssl_options(server_psk_anon, Config)]};
 	    psk_anon_with_hint ->
 		{ssl_test_lib:ssl_options(client_psk, Config),
-                 [{ciphers, ssl_test_lib:psk_anon_suites(NVersion)} |
+                 [{ciphers, Ciphers} |
 		 ssl_test_lib:ssl_options(server_psk_anon_hint, Config)]};
 	    srp ->
 		{ssl_test_lib:ssl_options(client_srp, Config),
@@ -4644,7 +4821,8 @@ run_suites(Ciphers, Config, Type) ->
 		 ssl_test_lib:ssl_options(server_srp_dsa, Config)};
 	    ecdsa ->
 		{ssl_test_lib:ssl_options(client_verification_opts, Config),
-		 ssl_test_lib:ssl_options(server_ecdsa_opts, Config)};
+                 [{ciphers, Ciphers} |
+                  ssl_test_lib:ssl_options(server_ecdsa_opts, Config)]};
 	    ecdh_rsa ->
 		{ssl_test_lib:ssl_options(client_verification_opts, Config),
 		 ssl_test_lib:ssl_options(server_ecdh_rsa_opts, Config)};
@@ -4667,9 +4845,16 @@ run_suites(Ciphers, Config, Type) ->
 	    des_rsa ->
 		{ssl_test_lib:ssl_options(client_verification_opts, Config),
 		 [{ciphers, Ciphers} |
-		  ssl_test_lib:ssl_options(server_verification_opts, Config)]}
+		  ssl_test_lib:ssl_options(server_verification_opts, Config)]};
+            chacha_rsa ->
+                {ssl_test_lib:ssl_options(client_verification_opts, Config),
+                 [{ciphers, Ciphers} |
+                  ssl_test_lib:ssl_options(server_verification_opts, Config)]};
+            chacha_ecdsa ->
+               	{ssl_test_lib:ssl_options(client_verification_opts, Config),
+                 [{ciphers, Ciphers} |
+                  ssl_test_lib:ssl_options(server_ecdsa_opts, Config)]} 
 	end,
-
     Result =  lists:map(fun(Cipher) ->
 				cipher(Cipher, Version, Config, ClientOpts, ServerOpts) end,
 			ssl_test_lib:filter_suites(Ciphers, Version)),
diff --git a/lib/ssl/test/ssl_bench.spec b/lib/ssl/test/ssl_bench.spec
index d2f75b4203..8b746c5ca9 100644
--- a/lib/ssl/test/ssl_bench.spec
+++ b/lib/ssl/test/ssl_bench.spec
@@ -1 +1 @@
-{suites,"../ssl_test",[ssl_bench_SUITE]}.
+{suites,"../ssl_test",[ssl_bench_SUITE, ssl_dist_bench_SUITE]}.
diff --git a/lib/ssl/test/ssl_bench_SUITE.erl b/lib/ssl/test/ssl_bench_SUITE.erl
index ae2928b1c3..3fe6338d69 100644
--- a/lib/ssl/test/ssl_bench_SUITE.erl
+++ b/lib/ssl/test/ssl_bench_SUITE.erl
@@ -40,11 +40,11 @@ end_per_group(_GroupName, _Config) ->
     ok.
 
 init_per_suite(Config) ->
-    try
-	Server = setup(ssl, node()),
-	[{server_node, Server}|Config]
-    catch _:_ ->
-	    {skipped, "Benchmark machines only"}
+    case node() of
+        nonode@nohost ->
+            {skipped, "Node not distributed"};
+        _ ->
+            [{server_node, ssl_bench_test_lib:setup(perf_server)}|Config]
     end.
 
 end_per_suite(_Config) ->
@@ -132,10 +132,10 @@ bypass_pem_cache(_Config) ->
 
 
 ssl() ->
-    test(ssl, ?COUNT, node()).
+    test(ssl, ?COUNT).
 
-test(Type, Count, Host) ->
-    Server = setup(Type, Host),
+test(Type, Count) ->
+    Server = ssl_bench_test_lib:setup(perf_server),
     (do_test(Type, setup_connection, Count * 20, 1, Server)),
     (do_test(Type, setup_connection, Count, 100, Server)),
     (do_test(Type, payload, Count*300, 10, Server)),
@@ -294,47 +294,6 @@ msg() ->
       "asdlkjsafsdfoierwlejsdlkfjsdf">>.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-setup(_Type, nonode@nohost) ->
-    exit(dist_not_enabled);
-setup(Type, _This) ->
-    Host = case os:getenv(?remote_host) of
-	       false ->
-		   {ok, This} = inet:gethostname(),
-		   This;
-	       RemHost ->
-		   RemHost
-	   end,
-    Node = list_to_atom("perf_server@" ++ Host),
-    SlaveArgs = case init:get_argument(pa) of
-	       {ok, PaPaths} ->
-		   lists:append([" -pa " ++ P || [P] <- PaPaths]);
-	       _ -> []
-	   end,
-    %% io:format("Slave args: ~p~n",[SlaveArgs]),
-    Prog =
-	case os:find_executable("erl") of
-	    false -> "erl";
-	    P -> P
-	end,
-    io:format("Prog = ~p~n", [Prog]),
-
-    case net_adm:ping(Node) of
-	pong -> ok;
-	pang ->
-	    {ok, Node} = slave:start(Host, perf_server, SlaveArgs, no_link, Prog)
-    end,
-    Path = code:get_path(),
-    true = rpc:call(Node, code, set_path, [Path]),
-    ok = rpc:call(Node, ?MODULE, setup_server, [Type, node()]),
-    io:format("Client (~p) using ~s~n",[node(), code:which(ssl)]),
-    (Node =:= node()) andalso restrict_schedulers(client),
-    Node.
-
-setup_server(_Type, ClientNode) ->
-    (ClientNode =:= node()) andalso restrict_schedulers(server),
-    io:format("Server (~p) using ~s~n",[node(), code:which(ssl)]),
-    ok.
-
 
 ensure_all_started(App, Ack) ->
     case application:start(App) of
@@ -358,13 +317,6 @@ setup_server_init(Type, Tc, Loop, PC) ->
     unlink(Pid),
     Res.
 
-restrict_schedulers(Type) ->
-    %% We expect this to run on 8 core machine
-    Extra0 = 1,
-    Extra =  if (Type =:= server) -> -Extra0; true -> Extra0 end,
-    Scheds = erlang:system_info(schedulers),
-    erlang:system_flag(schedulers_online, (Scheds div 2) + Extra).
-
 tc(Fun, Mod, Line) ->
     case timer:tc(Fun) of
 	{_,{'EXIT',Reason}} ->
diff --git a/lib/ssl/test/ssl_bench_test_lib.erl b/lib/ssl/test/ssl_bench_test_lib.erl
new file mode 100644
index 0000000000..e5cbb911bd
--- /dev/null
+++ b/lib/ssl/test/ssl_bench_test_lib.erl
@@ -0,0 +1,75 @@
+%%%-------------------------------------------------------------------
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(ssl_bench_test_lib).
+
+%% API
+-export([setup/1]).
+
+%% Internal exports
+-export([setup_server/1]).
+
+-define(remote_host, "NETMARKS_REMOTE_HOST").
+
+setup(Name) ->
+    Host = case os:getenv(?remote_host) of
+	       false ->
+		   {ok, This} = inet:gethostname(),
+		   This;
+	       RemHost ->
+		   RemHost
+	   end,
+    Node = list_to_atom(atom_to_list(Name) ++ "@" ++ Host),
+    SlaveArgs = case init:get_argument(pa) of
+	       {ok, PaPaths} ->
+		   lists:append([" -pa " ++ P || [P] <- PaPaths]);
+	       _ -> []
+	   end,
+    %% io:format("Slave args: ~p~n",[SlaveArgs]),
+    Prog =
+	case os:find_executable("erl") of
+	    false -> "erl";
+	    P -> P
+	end,
+    io:format("Prog = ~p~n", [Prog]),
+
+    case net_adm:ping(Node) of
+	pong -> ok;
+	pang ->
+	    {ok, Node} =
+                slave:start(Host, Name, SlaveArgs, no_link, Prog)
+    end,
+    Path = code:get_path(),
+    true = rpc:call(Node, code, set_path, [Path]),
+    ok = rpc:call(Node, ?MODULE, setup_server, [node()]),
+    io:format("Client (~p) using ~s~n",[node(), code:which(ssl)]),
+    (Node =:= node()) andalso restrict_schedulers(client),
+    Node.
+
+setup_server(ClientNode) ->
+    (ClientNode =:= node()) andalso restrict_schedulers(server),
+    io:format("Server (~p) using ~s~n",[node(), code:which(ssl)]),
+    ok.
+
+restrict_schedulers(Type) ->
+    %% We expect this to run on 8 core machine
+    Extra0 = 1,
+    Extra =  if (Type =:= server) -> -Extra0; true -> Extra0 end,
+    Scheds = erlang:system_info(schedulers),
+    erlang:system_flag(schedulers_online, (Scheds div 2) + Extra).
diff --git a/lib/ssl/test/ssl_dist_SUITE.erl b/lib/ssl/test/ssl_dist_SUITE.erl
index 8740e8c8f0..c822a52d1f 100644
--- a/lib/ssl/test/ssl_dist_SUITE.erl
+++ b/lib/ssl/test/ssl_dist_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2007-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@
 
 -include_lib("common_test/include/ct.hrl").
 -include_lib("public_key/include/public_key.hrl").
+-include("ssl_dist_test_lib.hrl").
 
 %% Note: This directive should only be used in test suites.
 -compile(export_all).
@@ -30,12 +31,12 @@
 
 -define(AWAIT_SSL_NODE_UP_TIMEOUT, 30000).
 
--record(node_handle,
-	{connection_handler,
-	 socket,
-	 name,
-	 nodename}
-       ).
+-import(ssl_dist_test_lib,
+        [tstsrvr_format/2, send_to_tstcntrl/1,
+         apply_on_ssl_node/4, apply_on_ssl_node/2,
+         stop_ssl_node/1]).
+start_ssl_node_name(Name, Args) ->
+    ssl_dist_test_lib:start_ssl_node(Name, Args).
 
 %%--------------------------------------------------------------------
 %% Common Test interface functions -----------------------------------
@@ -140,11 +141,14 @@ basic_test(NH1, NH2, _) ->
 		  apply_on_ssl_node(
 		    NH1,
 		    fun () ->
-			    tstsrvr_format("Hi from ~p!~n", [node()]),
-			    send_to_tstcntrl({Ref, self()}),
+			    tstsrvr_format(
+                              "Hi from ~p!~n", [node()]),
+			    send_to_tstcntrl(
+                              {Ref, self()}),
 			    receive
 				{From, ping} ->
-				    tstsrvr_format("Received ping ~p!~n", [node()]),
+				    tstsrvr_format(
+                                      "Received ping ~p!~n", [node()]),
 				    From ! {self(), pong}
 			    end
 		    end)
@@ -154,7 +158,8 @@ basic_test(NH1, NH2, _) ->
 	     ok = apply_on_ssl_node(
 		    NH2,
 		    fun () ->
-			    tstsrvr_format("Hi from ~p!~n", [node()]),
+			    tstsrvr_format(
+                              "Hi from ~p!~n", [node()]),
 			    SslPid ! {self(), ping},
 			    receive
 				{SslPid, pong} ->
@@ -183,7 +188,8 @@ payload_test(NH1, NH2, _) ->
 		  apply_on_ssl_node(
 		    NH1,
 		    fun () ->
-			    send_to_tstcntrl({Ref, self()}),
+			    send_to_tstcntrl(
+                              {Ref, self()}),
 			    receive
 				{From, Msg} ->
 				    From ! {self(), Msg}
@@ -616,12 +622,6 @@ gen_dist_test(Test, Config) ->
 %% ssl_node side api
 %%
 
-tstsrvr_format(Fmt, ArgList) ->
-    send_to_tstsrvr({format, Fmt, ArgList}).
-
-send_to_tstcntrl(Message) ->
-    send_to_tstsrvr({message, Message}).
-
 try_setting_priority(TestFun, Config) ->
     Prio = 1,
     case gen_udp:open(0, [{priority,Prio}]) of
@@ -653,44 +653,6 @@ inet_ports() ->
 %% test_server side api
 %%
 
-apply_on_ssl_node(Node, M, F, A) when is_atom(M), is_atom(F), is_list(A) ->
-    Ref = make_ref(),
-    send_to_ssl_node(Node, {apply, self(), Ref, M, F, A}),
-    receive
-	{Ref, Result} ->
-	    Result
-    end.
-
-apply_on_ssl_node(Node, Fun) when is_function(Fun, 0) ->
-    Ref = make_ref(),
-    send_to_ssl_node(Node, {apply, self(), Ref, Fun}),
-    receive
-	{Ref, Result} ->
-	    Result
-    end.
-
-stop_ssl_node(#node_handle{connection_handler = Handler,
-			   socket = Socket,
-			   name = Name}) ->
-    ?t:format("Trying to stop ssl node ~s.~n", [Name]),
-    Mon = erlang:monitor(process, Handler),
-    unlink(Handler),
-    case gen_tcp:send(Socket, term_to_binary(stop)) of
-	ok ->
-	    receive
-		{'DOWN', Mon, process, Handler, Reason} ->
-		    case Reason of
-			normal ->
-			    ok;
-			_ -> 
-			    ct:pal("Down  ~p ~n", [Reason])
-		    end
-	    end;
-	Error ->
-	    erlang:demonitor(Mon, [flush]),
-	    ct:pal("Warning  ~p ~n", [Error])
-    end.
-
 start_ssl_node(Config) ->
     start_ssl_node(Config, "").
 
@@ -698,29 +660,8 @@ start_ssl_node(Config, XArgs) ->
     Name = mk_node_name(Config),
     SSL = proplists:get_value(ssl_opts, Config),
     SSLDistOpts = setup_dist_opts(Config),
-    start_ssl_node_raw(Name, SSL ++ " " ++ SSLDistOpts ++ XArgs).
-
-start_ssl_node_raw(Name, Args) ->
-    {ok, LSock} = gen_tcp:listen(0,
-				 [binary, {packet, 4}, {active, false}]),
-    {ok, ListenPort} = inet:port(LSock),
-    CmdLine = mk_node_cmdline(ListenPort, Name, Args),
-    ?t:format("Attempting to start ssl node ~ts: ~ts~n", [Name, CmdLine]),
-    case open_port({spawn, CmdLine}, []) of
-	Port when is_port(Port) ->
-	    unlink(Port),
-	    erlang:port_close(Port),
-	    case await_ssl_node_up(Name, LSock) of
-		#node_handle{} = NodeHandle ->
-		    ?t:format("Ssl node ~s started.~n", [Name]),
-		    NodeName = list_to_atom(Name ++ "@" ++ host_name()),
-		    NodeHandle#node_handle{nodename = NodeName};
-		Error ->
-		    exit({failed_to_start_node, Name, Error})
-	    end;
-	Error ->
-	    exit({failed_to_start_node, Name, Error})
-    end.
+    start_ssl_node_name(
+      Name, SSL ++ " " ++ SSLDistOpts ++ XArgs).
 
 cache_crls_on_ssl_nodes(PrivDir, CANames, NHs) ->
     [begin
@@ -739,11 +680,6 @@ cache_crls_on_ssl_nodes(PrivDir, CANames, NHs) ->
 %% command line creation
 %%
 
-host_name() ->
-    [$@ | Host] = lists:dropwhile(fun ($@) -> false; (_) -> true end,
-				  atom_to_list(node())),
-    Host.
-
 mk_node_name(Config) ->
     N = erlang:unique_integer([positive]),
     Case = proplists:get_value(testcase, Config),
@@ -753,225 +689,6 @@ mk_node_name(Config) ->
 	++ "_"
 	++ integer_to_list(N).
 
-mk_node_cmdline(ListenPort, Name, Args) ->
-    Static = "-detached -noinput",
-    Pa = filename:dirname(code:which(?MODULE)),
-    Prog = case catch init:get_argument(progname) of
-	       {ok,[[P]]} -> P;
-	       _ -> exit(no_progname_argument_found)
-	   end,
-    NameSw = case net_kernel:longnames() of
-		 false -> "-sname ";
-		 _ -> "-name "
-	     end,
-    {ok, Pwd} = file:get_cwd(),
-    "\"" ++ Prog ++ "\" "
-	++ Static ++ " "
-	++ NameSw ++ " " ++ Name ++ " "
-	++ "-pa " ++ Pa ++ " "
-	++ "-run application start crypto -run application start public_key "
-	++ "-eval 'net_kernel:verbose(1)' "
-	++ "-run " ++ atom_to_list(?MODULE) ++ " cnct2tstsrvr "
-	++ host_name() ++ " "
-	++ integer_to_list(ListenPort) ++ " "
-	++ Args ++ " "
-	++ "-env ERL_CRASH_DUMP " ++ Pwd ++ "/erl_crash_dump." ++ Name ++ " "
-	++ "-kernel error_logger \"{file,\\\"" ++ Pwd ++ "/error_log." ++ Name ++ "\\\"}\" "
-	++ "-setcookie " ++ atom_to_list(erlang:get_cookie()).
-
-%%
-%% Connection handler test_server side
-%%
-
-await_ssl_node_up(Name, LSock) ->
-    case gen_tcp:accept(LSock, ?AWAIT_SSL_NODE_UP_TIMEOUT) of
-	timeout ->
-	    gen_tcp:close(LSock),
-	    ?t:format("Timeout waiting for ssl node ~s to come up~n",
-		      [Name]),
-	    timeout;
-	{ok, Socket} ->
-	    gen_tcp:close(LSock),
-	    case gen_tcp:recv(Socket, 0) of
-		{ok, Bin} ->
-		    check_ssl_node_up(Socket, Name, Bin);
-		{error, closed} ->
-		    gen_tcp:close(Socket),
-		    exit({lost_connection_with_ssl_node_before_up, Name})
-	    end;
-	{error, Error} ->
-	    gen_tcp:close(LSock),
-	    exit({accept_failed, Error})
-    end.
-
-check_ssl_node_up(Socket, Name, Bin) ->
-    case catch binary_to_term(Bin) of
-	{'EXIT', _} ->
-	    gen_tcp:close(Socket),
-	    exit({bad_data_received_from_ssl_node, Name, Bin});
-	{ssl_node_up, NodeName} ->
-	    case list_to_atom(Name++"@"++host_name()) of
-		NodeName ->
-		    Parent = self(),
-		    Go = make_ref(),
-		    %% Spawn connection handler on test server side
-		    Pid = spawn_link(
-			    fun () ->
-				    receive Go -> ok end,
-				    tstsrvr_con_loop(Name, Socket, Parent)
-			    end),
-		    ok = gen_tcp:controlling_process(Socket, Pid),
-		    Pid ! Go,
-		    #node_handle{connection_handler = Pid,
-				 socket = Socket,
-				 name = Name};
-		_ ->
-		    exit({unexpected_ssl_node_connected, NodeName})
-	    end;
-	Msg ->
-	    exit({unexpected_msg_instead_of_ssl_node_up, Name, Msg})
-    end.
-
-send_to_ssl_node(#node_handle{connection_handler = Hndlr}, Term) ->
-    Hndlr ! {relay_to_ssl_node, term_to_binary(Term)},
-    ok.
-
-tstsrvr_con_loop(Name, Socket, Parent) ->
-    inet:setopts(Socket,[{active,once}]),
-    receive
-	{relay_to_ssl_node, Data} when is_binary(Data) ->
-	    case gen_tcp:send(Socket, Data) of
-		ok ->
-		    ok;
-		_Error ->
-		    gen_tcp:close(Socket),
-		    exit({failed_to_relay_data_to_ssl_node, Name, Data})
-	    end;
-	{tcp, Socket, Bin} ->
-	    case catch binary_to_term(Bin) of
-		{'EXIT', _} ->
-		    gen_tcp:close(Socket),
-		    exit({bad_data_received_from_ssl_node, Name, Bin});
-		{format, FmtStr, ArgList} ->
-		    ?t:format(FmtStr, ArgList);
-		{message, Msg} ->
-		    ?t:format("Got message ~p", [Msg]),
-		    Parent ! Msg;
-		{apply_res, To, Ref, Res} ->
-		    To ! {Ref, Res};
-		bye ->
-		    ?t:format("Ssl node ~s stopped.~n", [Name]),
-		    gen_tcp:close(Socket),
-		    exit(normal);
-		Unknown ->
-		    exit({unexpected_message_from_ssl_node, Name, Unknown})
-	    end;
-	{tcp_closed, Socket} ->
-	    gen_tcp:close(Socket),
-	    exit({lost_connection_with_ssl_node, Name})
-    end,
-    tstsrvr_con_loop(Name, Socket, Parent).
-
-%%
-%% Connection handler ssl_node side
-%%
-
-% cnct2tstsrvr() is called via command line arg -run ...
-cnct2tstsrvr([Host, Port]) when is_list(Host), is_list(Port) ->
-    %% Spawn connection handler on ssl node side
-    ConnHandler
-	= spawn(fun () ->
-			case catch gen_tcp:connect(Host,
-						   list_to_integer(Port),
-						   [binary,
-						    {packet, 4},
-						    {active, false}]) of
-			    {ok, Socket} ->
-				notify_ssl_node_up(Socket),
-				ets:new(test_server_info,
-					[set,
-					 public,
-					 named_table,
-					 {keypos, 1}]),
-				ets:insert(test_server_info,
-					   {test_server_handler, self()}),
-				ssl_node_con_loop(Socket);
-			    Error ->
-				halt("Failed to connect to test server " ++
-					 lists:flatten(io_lib:format("Host:~p ~n Port:~p~n Error:~p~n",
-								     [Host, Port, Error])))
-			end
-		end),
-    spawn(fun () ->
-		  Mon = erlang:monitor(process, ConnHandler),
-		  receive
-		      {'DOWN', Mon, process, ConnHandler, Reason} ->
-			  receive after 1000 -> ok end,
-			  halt("test server connection handler terminated: " ++
-				   lists:flatten(io_lib:format("~p", [Reason])))
-		  end
-	  end).
-
-notify_ssl_node_up(Socket) ->
-    case catch gen_tcp:send(Socket,
-			    term_to_binary({ssl_node_up, node()})) of
-	ok -> ok;
-	_ -> halt("Failed to notify test server that I'm up")
-    end.
-
-send_to_tstsrvr(Term) ->
-    case catch ets:lookup_element(test_server_info, test_server_handler, 2) of
-	Hndlr when is_pid(Hndlr) ->
-	    Hndlr ! {relay_to_test_server, term_to_binary(Term)}, ok;
-	_ ->
-	    receive after 200 -> ok end,
-	    send_to_tstsrvr(Term)
-    end.
-
-ssl_node_con_loop(Socket) ->
-    inet:setopts(Socket,[{active,once}]),
-    receive
-	{relay_to_test_server, Data} when is_binary(Data) ->
-	    case gen_tcp:send(Socket, Data) of
-		ok ->
-		    ok;
-		_Error ->
-		    gen_tcp:close(Socket),
-		    halt("Failed to relay data to test server")
-	    end;
-	{tcp, Socket, Bin} ->
-	    case catch binary_to_term(Bin) of
-		{'EXIT', _} ->
-		    gen_tcp:close(Socket),
-		    halt("test server sent me bad data");
-		{apply, From, Ref, M, F, A} ->
-		    spawn_link(
-		      fun () ->
-			      send_to_tstsrvr({apply_res,
-					       From,
-					       Ref,
-					       (catch apply(M, F, A))})
-			  end);
-		{apply, From, Ref, Fun} ->
-		    spawn_link(fun () ->
-				       send_to_tstsrvr({apply_res,
-							From,
-							Ref,
-							(catch Fun())})
-			       end);
-		stop ->
-		    gen_tcp:send(Socket, term_to_binary(bye)),
-		    gen_tcp:close(Socket),
-		    init:stop(),
-		    receive after infinity -> ok end;
-		_Unknown ->
-		    halt("test server sent me an unexpected message")
-	    end;
-	{tcp_closed, Socket} ->
-	    halt("Lost connection to test server")
-    end,
-    ssl_node_con_loop(Socket).
-
 %%
 %% Setup ssl dist info
 %%
diff --git a/lib/ssl/test/ssl_dist_bench_SUITE.erl b/lib/ssl/test/ssl_dist_bench_SUITE.erl
new file mode 100644
index 0000000000..4d27564319
--- /dev/null
+++ b/lib/ssl/test/ssl_dist_bench_SUITE.erl
@@ -0,0 +1,481 @@
+%%%-------------------------------------------------------------------
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(ssl_dist_bench_SUITE).
+
+-include_lib("common_test/include/ct_event.hrl").
+-include_lib("public_key/include/public_key.hrl").
+
+%% CT meta
+-export([suite/0, all/0, groups/0,
+         init_per_suite/1, end_per_suite/1,
+         init_per_group/2, end_per_group/2,
+         init_per_testcase/2, end_per_testcase/2]).
+
+%% Test cases
+-export(
+   [setup/1,
+    roundtrip/1,
+    throughput_1024/1,
+    throughput_4096/1,
+    throughput_16384/1,
+    throughput_65536/1,
+    throughput_262144/1,
+    throughput_1048576/1]).
+
+%% Debug
+-export([payload/1]).
+
+%%%-------------------------------------------------------------------
+
+suite() -> [{ct_hooks, [{ts_install_cth, [{nodenames, 2}]}]}].
+
+all() -> [{group, ssl}, {group, plain}].
+
+groups() ->
+    [{ssl, all_groups()},
+     {plain, all_groups()},
+     %%
+     {setup, [{repeat, 1}], [setup]},
+     {roundtrip, [{repeat, 1}], [roundtrip]},
+     {throughput, [{repeat, 1}],
+      [throughput_1024,
+       throughput_4096,
+       throughput_16384,
+       throughput_65536,
+       throughput_262144,
+       throughput_1048576]}].
+
+all_groups() ->
+    [{group, setup},
+     {group, roundtrip},
+     {group, throughput}].
+
+init_per_suite(Config) ->
+    Digest = sha1,
+    ECCurve = secp521r1,
+    TLSVersion = 'tlsv1.2',
+    TLSCipher = {ecdhe_ecdsa,aes_128_cbc,sha256,sha256},
+    %%
+    Node = node(),
+    try
+        Node =/= nonode@nohost orelse
+            throw({skipped,"Node not distributed"}),
+        {supported, SSLVersions} =
+            lists:keyfind(supported, 1, ssl:versions()),
+        lists:member(TLSVersion, SSLVersions) orelse
+            throw(
+              {skipped,
+               "SSL does not support " ++ term_to_string(TLSVersion)}),
+        lists:member(ECCurve, ssl:eccs(TLSVersion)) orelse
+            throw(
+              {skipped,
+               "SSL does not support " ++ term_to_string(ECCurve)}),
+        lists:member(TLSCipher, ssl:cipher_suites()) orelse
+            throw(
+              {skipped,
+               "SSL does not support " ++ term_to_string(TLSCipher)})
+    of
+        _ ->
+            PrivDir = proplists:get_value(priv_dir, Config),
+            %%
+            [_, HostA] = string:split(atom_to_list(Node), "@"),
+            NodeAName = ?MODULE_STRING ++ "_node_a",
+            NodeAString = NodeAName ++ "@" ++ HostA,
+            NodeAConfFile = filename:join(PrivDir, NodeAString ++ ".conf"),
+            NodeA = list_to_atom(NodeAString),
+            %%
+            ServerNode = ssl_bench_test_lib:setup(dist_server),
+            [_, HostB] = string:split(atom_to_list(ServerNode), "@"),
+            NodeBName = ?MODULE_STRING ++ "_node_b",
+            NodeBString = NodeBName ++ "@" ++ HostB,
+            NodeBConfFile = filename:join(PrivDir, NodeBString ++ ".conf"),
+            NodeB = list_to_atom(NodeBString),
+            %%
+            CertOptions =
+                [{digest, Digest},
+                 {key, {namedCurve, ECCurve}}],
+            RootCert =
+                public_key:pkix_test_root_cert(
+                  ?MODULE_STRING ++ " ROOT CA", CertOptions),
+            SSLConf =
+                [{verify, verify_peer},
+                 {versions, [TLSVersion]},
+                 {ciphers, [TLSCipher]}],
+            %%
+            write_node_conf(
+              NodeAConfFile, NodeA,
+              [{fail_if_no_peer_cert, true} | SSLConf], SSLConf,
+              CertOptions, RootCert),
+            write_node_conf(
+              NodeBConfFile, NodeB,
+              [{fail_if_no_peer_cert, true} | SSLConf], SSLConf,
+              CertOptions, RootCert),
+            %%
+            [{node_a_name, NodeAName},
+             {node_a, NodeA},
+             {node_a_dist_args,
+              "-proto_dist inet_tls "
+              "-ssl_dist_optfile " ++ NodeAConfFile ++ " "},
+             {node_b_name, NodeBName},
+             {node_b, NodeB},
+             {node_b_dist_args,
+              "-proto_dist inet_tls "
+              "-ssl_dist_optfile " ++ NodeBConfFile ++ " "},
+             {server_node, ServerNode}
+             |Config]
+    catch
+        throw:Result ->
+            Result
+    end.
+
+end_per_suite(Config) ->
+    ServerNode = proplists:get_value(server_node, Config),
+    slave:stop(ServerNode).
+
+init_per_group(ssl, Config) ->
+    [{ssl_dist, true}, {ssl_dist_prefix, "SSL"}|Config];
+init_per_group(plain, Config) ->
+    [{ssl_dist, false}, {ssl_dist_prefix, "Plain"}|Config];
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, _Config) ->
+    ok.
+
+init_per_testcase(_Func, Conf) ->
+    Conf.
+
+end_per_testcase(_Func, _Conf) ->
+    ok.
+
+-define(COUNT, 400).
+
+%%%-------------------------------------------------------------------
+%%% CommonTest API helpers
+
+write_node_conf(
+  ConfFile, Node, ServerConf, ClientConf, CertOptions, RootCert) ->
+    Conf =
+        public_key:pkix_test_data(
+          #{root => RootCert,
+            peer =>
+                [{extensions,
+                  [#'Extension'{
+                      extnID = ?'id-ce-subjectAltName',
+                      extnValue = [{dNSName, atom_to_list(Node)}],
+                      critical = false}]} | CertOptions]}),
+    NodeConf =
+        [{server, ServerConf ++ Conf}, {client, ClientConf ++ Conf}],
+    {ok, Fd} = file:open(ConfFile, [write]),
+    ok = file:change_mode(ConfFile, 8#400),
+    io:format(Fd, "~p.~n", [NodeConf]),
+    ok = file:close(Fd).
+
+
+%%%-------------------------------------------------------------------
+%%% Test cases
+
+%%-----------------------
+%% Connection setup speed
+
+setup(Config) ->
+    run_nodepair_test(fun setup/5, Config).
+
+setup(A, B, Prefix, HA, HB) ->
+    Rounds = 10,
+    [] = ssl_apply(HA, erlang, nodes, []),
+    [] = ssl_apply(HB, erlang, nodes, []),
+    {SetupTime, CycleTime} =
+        ssl_apply(HA, fun () -> setup_runner(A, B, Rounds) end),
+    [] = ssl_apply(HA, erlang, nodes, []),
+    [] = ssl_apply(HB, erlang, nodes, []),
+    SetupSpeed = round((Rounds*1000000*1000) / SetupTime),
+    CycleSpeed = round((Rounds*1000000*1000) / CycleTime),
+    _ = report(Prefix++" Setup", SetupSpeed, "setups/1000s"),
+    report(Prefix++" Setup Cycle", CycleSpeed, "cycles/1000s").
+
+%% Runs on node A against rex in node B
+setup_runner(A, B, Rounds) ->
+    StartTime = start_time(),
+    SetupTime = setup_loop(A, B, 0, Rounds),
+    {microseconds(SetupTime), microseconds(elapsed_time(StartTime))}.
+
+setup_loop(_A, _B, T, 0) ->
+    T;
+setup_loop(A, B, T, N) ->
+    StartTime = start_time(),
+    [A] = rpc:block_call(B, erlang, nodes, []),
+    Time = elapsed_time(StartTime),
+    [B] = erlang:nodes(),
+    Mref = erlang:monitor(process, {rex,B}),
+    true = net_kernel:disconnect(B),
+    receive
+        {'DOWN',Mref,process,_,_} ->
+            [] = erlang:nodes(),
+            setup_loop(A, B, Time + T, N - 1)
+    end.
+
+
+%%----------------
+%% Roundtrip speed
+
+roundtrip(Config) ->
+    run_nodepair_test(fun roundtrip/5, Config).
+
+roundtrip(A, B, Prefix, HA, HB) ->
+    Rounds = 40000,
+    [] = ssl_apply(HA, erlang, nodes, []),
+    [] = ssl_apply(HB, erlang, nodes, []),
+    Time = ssl_apply(HA, fun () -> roundtrip_runner(A, B, Rounds) end),
+    [B] = ssl_apply(HA, erlang, nodes, []),
+    [A] = ssl_apply(HB, erlang, nodes, []),
+    Speed = round((Rounds*1000000) / Time),
+    report(Prefix++" Roundtrip", Speed, "pings/s").
+
+%% Runs on node A and spawns a server on node B
+roundtrip_runner(A, B, Rounds) ->
+    ClientPid = self(),
+    [A] = rpc:call(B, erlang, nodes, []),
+    ServerPid =
+        erlang:spawn(
+          B,
+          fun () -> roundtrip_server(ClientPid, Rounds) end),
+    ServerMon = erlang:monitor(process, ServerPid),
+    microseconds(
+      roundtrip_client(ServerPid, ServerMon, start_time(), Rounds)).
+
+roundtrip_server(_Pid, 0) ->
+    ok;
+roundtrip_server(Pid, N) ->
+    receive
+        N ->
+            Pid ! N,
+            roundtrip_server(Pid, N-1)
+    end.
+
+roundtrip_client(_Pid, Mon, StartTime, 0) ->
+    Time = elapsed_time(StartTime),
+    receive
+        {'DOWN', Mon, _, _, normal} ->
+            Time;
+        {'DOWN', Mon, _, _, Other} ->
+            exit(Other)
+    end;
+roundtrip_client(Pid, Mon, StartTime, N) ->
+    Pid ! N,
+    receive
+        N ->
+            roundtrip_client(Pid, Mon, StartTime, N - 1)
+    end.
+
+
+%%-----------------
+%% Throughput speed
+
+throughput_1024(Config) ->
+    run_nodepair_test(
+      fun (A, B, Prefix, HA, HB) ->
+              throughput(A, B, Prefix, HA, HB, 100000, 1024)
+      end, Config).
+
+throughput_4096(Config) ->
+    run_nodepair_test(
+      fun (A, B, Prefix, HA, HB) ->
+              throughput(A, B, Prefix, HA, HB, 50000, 4096)
+      end, Config).
+
+throughput_16384(Config) ->
+    run_nodepair_test(
+      fun (A, B, Prefix, HA, HB) ->
+              throughput(A, B, Prefix, HA, HB, 10000, 16384)
+      end, Config).
+
+throughput_65536(Config) ->
+    run_nodepair_test(
+      fun (A, B, Prefix, HA, HB) ->
+              throughput(A, B, Prefix, HA, HB, 2000, 65536)
+      end, Config).
+
+throughput_262144(Config) ->
+    run_nodepair_test(
+      fun (A, B, Prefix, HA, HB) ->
+              throughput(A, B, Prefix, HA, HB, 500, 262144)
+      end, Config).
+
+throughput_1048576(Config) ->
+    run_nodepair_test(
+      fun (A, B, Prefix, HA, HB) ->
+              throughput(A, B, Prefix, HA, HB, 200, 1048576)
+      end, Config).
+
+throughput(A, B, Prefix, HA, HB, Packets, Size) ->
+    [] = ssl_apply(HA, erlang, nodes, []),
+    [] = ssl_apply(HB, erlang, nodes, []),
+    Time =
+        ssl_apply(HA, fun () -> throughput_runner(A, B, Packets, Size) end),
+    [B] = ssl_apply(HA, erlang, nodes, []),
+    [A] = ssl_apply(HB, erlang, nodes, []),
+    Speed = round((Packets*Size*1000000) / (1024*Time)),
+    report(Prefix++" Throughput_"++integer_to_list(Size), Speed, "kB/s").
+
+%% Runs on node A and spawns a server on node B
+throughput_runner(A, B, Rounds, Size) ->
+    Payload = payload(Size),
+    ClientPid = self(),
+    [A] = rpc:call(B, erlang, nodes, []),
+    ServerPid =
+        erlang:spawn(
+          B,
+          fun () -> throughput_server(ClientPid, Rounds) end),
+    ServerMon = erlang:monitor(process, ServerPid),
+    microseconds(
+      throughput_client(
+        ServerPid, ServerMon, Payload, start_time(), Rounds)).
+
+throughput_server(_Pid, 0) ->
+    ok;
+throughput_server(Pid, N) ->
+    receive
+        [N|_] ->
+            throughput_server(Pid, N-1)
+    end.
+
+throughput_client(_Pid, Mon, _Payload, StartTime, 0) ->
+    receive
+        {'DOWN', Mon, _, _, normal} ->
+            elapsed_time(StartTime);
+        {'DOWN', Mon, _, _, Other} ->
+            exit(Other)
+    end;
+throughput_client(Pid, Mon, Payload, StartTime, N) ->
+    Pid ! [N|Payload],
+    throughput_client(Pid, Mon, Payload, StartTime, N - 1).
+
+%%%-------------------------------------------------------------------
+%%% Test cases helpers
+
+run_nodepair_test(TestFun, Config) ->
+    A = proplists:get_value(node_a, Config),
+    B = proplists:get_value(node_b, Config),
+    Prefix = proplists:get_value(ssl_dist_prefix, Config),
+    HA = start_ssl_node_a(Config),
+    HB = start_ssl_node_b(Config),
+    try TestFun(A, B, Prefix, HA, HB)
+    after
+        stop_ssl_node_a(HA),
+        stop_ssl_node_b(HB, Config),
+        ok
+    end.
+
+ssl_apply(Handle, M, F, Args) ->
+    case ssl_dist_test_lib:apply_on_ssl_node(Handle, M, F, Args) of
+        {'EXIT',Reason} ->
+            error(Reason);
+        Result ->
+            Result
+    end.
+
+ssl_apply(Handle, Fun) ->
+    case ssl_dist_test_lib:apply_on_ssl_node(Handle, Fun) of
+        {'EXIT',Reason} ->
+            error(Reason);
+        Result ->
+            Result
+    end.
+
+start_ssl_node_a(Config) ->
+    Name = proplists:get_value(node_a_name, Config),
+    Args = get_node_args(node_a_dist_args, Config),
+    ssl_dist_test_lib:start_ssl_node(Name, Args).
+
+start_ssl_node_b(Config) ->
+    Name = proplists:get_value(node_b_name, Config),
+    Args = get_node_args(node_b_dist_args, Config),
+    ServerNode = proplists:get_value(server_node, Config),
+    rpc:call(
+      ServerNode, ssl_dist_test_lib, start_ssl_node, [Name, Args]).
+
+stop_ssl_node_a(HA) ->
+    ssl_dist_test_lib:stop_ssl_node(HA).
+
+stop_ssl_node_b(HB, Config) ->
+    ServerNode = proplists:get_value(server_node, Config),
+    rpc:call(ServerNode, ssl_dist_test_lib, stop_ssl_node, [HB]).
+
+get_node_args(Tag, Config) ->
+    case proplists:get_value(ssl_dist, Config) of
+        true ->
+            proplists:get_value(Tag, Config);
+        false ->
+            ""
+    end.
+
+
+
+payload(Size) ->
+    iolist_to_binary(
+      [case Size bsr 8 of
+           0 ->
+               [];
+           Blocks ->
+               payload(Blocks, create_binary(256))
+       end | create_binary(Size band 255)]).
+%%
+payload(0, _) ->
+    [];
+payload(Blocks, Block) ->
+    Half = payload(Blocks bsr 1, Block),
+    [Half, Half |
+     if
+         Blocks band 1 =:= 1 ->
+             Block;
+         true ->
+             []
+     end].
+
+create_binary(Size) ->
+    create_binary(Size, <<>>).
+%%
+create_binary(0, Bin) ->
+    Bin;
+create_binary(Size, Bin) ->
+    NextSize = Size - 1,
+    create_binary(NextSize, <<Bin/binary, NextSize>>).
+
+start_time() ->
+    erlang:system_time().
+
+elapsed_time(StartTime) ->
+    erlang:system_time() - StartTime.
+
+microseconds(Time) ->
+    erlang:convert_time_unit(Time, native, microsecond).
+
+report(Name, Value, Unit) ->
+    ct:pal("~s: ~w ~s", [Name, Value, Unit]),
+    ct_event:notify(
+      #event{
+         name = benchmark_data,
+         data = [{value, Value}, {suite, "ssl_dist"}, {name, Name}]}),
+    {comment, term_to_string(Value) ++ " " ++ Unit}.
+
+term_to_string(Term) ->
+    unicode:characters_to_list(
+      io_lib:write(Term, [{encoding, unicode}])).
diff --git a/lib/ssl/test/ssl_dist_test_lib.erl b/lib/ssl/test/ssl_dist_test_lib.erl
new file mode 100644
index 0000000000..1b9c853fc4
--- /dev/null
+++ b/lib/ssl/test/ssl_dist_test_lib.erl
@@ -0,0 +1,343 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-module(ssl_dist_test_lib).
+
+-include_lib("common_test/include/ct.hrl").
+-include_lib("public_key/include/public_key.hrl").
+-include("ssl_dist_test_lib.hrl").
+
+-export([tstsrvr_format/2, send_to_tstcntrl/1]).
+-export([apply_on_ssl_node/4, apply_on_ssl_node/2]).
+-export([stop_ssl_node/1, start_ssl_node/2]).
+%%
+-export([cnct2tstsrvr/1]).
+
+-define(AWAIT_SSL_NODE_UP_TIMEOUT, 30000).
+
+
+
+%% ssl_node side api
+%%
+
+tstsrvr_format(Fmt, ArgList) ->
+    send_to_tstsrvr({format, Fmt, ArgList}).
+
+send_to_tstcntrl(Message) ->
+    send_to_tstsrvr({message, Message}).
+
+
+%%
+%% test_server side api
+%%
+
+apply_on_ssl_node(
+  #node_handle{connection_handler = Hndlr} = Node,
+  M, F, A) when is_atom(M), is_atom(F), is_list(A) ->
+    Ref = erlang:monitor(process, Hndlr),
+    apply_on_ssl_node(Node, Ref, {apply, self(), Ref, M, F, A}).
+
+apply_on_ssl_node(
+  #node_handle{connection_handler = Hndlr} = Node,
+  Fun) when is_function(Fun, 0) ->
+    Ref = erlang:monitor(process, Hndlr),
+    apply_on_ssl_node(Node, Ref, {apply, self(), Ref, Fun}).
+
+apply_on_ssl_node(Node, Ref, Msg) ->
+    send_to_ssl_node(Node, Msg),
+    receive
+        {'DOWN', Ref, process, Hndlr, Reason} ->
+            exit({handler_died, Hndlr, Reason});
+	{Ref, Result} ->
+	    Result
+    end.
+
+stop_ssl_node(#node_handle{connection_handler = Handler,
+			   socket = Socket,
+			   name = Name}) ->
+    ?t:format("Trying to stop ssl node ~s.~n", [Name]),
+    Mon = erlang:monitor(process, Handler),
+    unlink(Handler),
+    case gen_tcp:send(Socket, term_to_binary(stop)) of
+	ok ->
+	    receive
+		{'DOWN', Mon, process, Handler, Reason} ->
+		    case Reason of
+			normal ->
+			    ok;
+			_ ->
+			    ct:pal(
+                              "stop_ssl_node/1 ~s Down  ~p ~n",
+                              [Name,Reason])
+		    end
+	    end;
+	Error ->
+	    erlang:demonitor(Mon, [flush]),
+	    ct:pal("stop_ssl_node/1 ~s Warning ~p ~n", [Name,Error])
+    end.
+
+start_ssl_node(Name, Args) ->
+    {ok, LSock} = gen_tcp:listen(0,
+				 [binary, {packet, 4}, {active, false}]),
+    {ok, ListenPort} = inet:port(LSock),
+    CmdLine = mk_node_cmdline(ListenPort, Name, Args),
+    ?t:format("Attempting to start ssl node ~ts: ~ts~n", [Name, CmdLine]),
+    case open_port({spawn, CmdLine}, []) of
+	Port when is_port(Port) ->
+	    unlink(Port),
+	    erlang:port_close(Port),
+	    case await_ssl_node_up(Name, LSock) of
+		#node_handle{} = NodeHandle ->
+		    ?t:format("Ssl node ~s started.~n", [Name]),
+		    NodeName = list_to_atom(Name ++ "@" ++ host_name()),
+		    NodeHandle#node_handle{nodename = NodeName};
+		Error ->
+		    exit({failed_to_start_node, Name, Error})
+	    end;
+	Error ->
+	    exit({failed_to_start_node, Name, Error})
+    end.
+
+host_name() ->
+    [_, Host] = string:split(atom_to_list(node()), "@"),
+    %% [$@ | Host] = lists:dropwhile(fun ($@) -> false; (_) -> true end,
+    %%     			  atom_to_list(node())),
+    Host.
+
+mk_node_cmdline(ListenPort, Name, Args) ->
+    Static = "-detached -noinput",
+    Pa = filename:dirname(code:which(?MODULE)),
+    Prog = case catch init:get_argument(progname) of
+	       {ok,[[P]]} -> P;
+	       _ -> exit(no_progname_argument_found)
+	   end,
+    NameSw = case net_kernel:longnames() of
+		 false -> "-sname ";
+		 _ -> "-name "
+	     end,
+    {ok, Pwd} = file:get_cwd(),
+    "\"" ++ Prog ++ "\" "
+	++ Static ++ " "
+	++ NameSw ++ " " ++ Name ++ " "
+	++ "-pa " ++ Pa ++ " "
+	++ "-run application start crypto -run application start public_key "
+	++ "-eval 'net_kernel:verbose(1)' "
+	++ "-run " ++ atom_to_list(?MODULE) ++ " cnct2tstsrvr "
+	++ host_name() ++ " "
+	++ integer_to_list(ListenPort) ++ " "
+	++ Args ++ " "
+	++ "-env ERL_CRASH_DUMP " ++ Pwd ++ "/erl_crash_dump." ++ Name ++ " "
+	++ "-kernel error_logger \"{file,\\\"" ++ Pwd ++ "/error_log." ++ Name ++ "\\\"}\" "
+	++ "-setcookie " ++ atom_to_list(erlang:get_cookie()).
+
+%%
+%% Connection handler test_server side
+%%
+
+await_ssl_node_up(Name, LSock) ->
+    case gen_tcp:accept(LSock, ?AWAIT_SSL_NODE_UP_TIMEOUT) of
+	{ok, Socket} ->
+	    gen_tcp:close(LSock),
+	    case gen_tcp:recv(Socket, 0) of
+		{ok, Bin} ->
+		    check_ssl_node_up(Socket, Name, Bin);
+		{error, closed} ->
+		    gen_tcp:close(Socket),
+		    exit({lost_connection_with_ssl_node_before_up, Name})
+	    end;
+	{error, Error} ->
+	    gen_tcp:close(LSock),
+            ?t:format("Accept failed for ssl node ~s: ~p~n", [Name,Error]),
+	    exit({accept_failed, Error})
+    end.
+
+check_ssl_node_up(Socket, Name, Bin) ->
+    case catch binary_to_term(Bin) of
+	{'EXIT', _} ->
+	    gen_tcp:close(Socket),
+	    exit({bad_data_received_from_ssl_node, Name, Bin});
+	{ssl_node_up, NodeName} ->
+	    case list_to_atom(Name++"@"++host_name()) of
+		NodeName ->
+		    Parent = self(),
+		    Go = make_ref(),
+		    %% Spawn connection handler on test server side
+		    Pid = spawn_link(
+			    fun () ->
+				    receive Go -> ok end,
+                                    process_flag(trap_exit, true),
+				    tstsrvr_con_loop(Name, Socket, Parent)
+			    end),
+		    ok = gen_tcp:controlling_process(Socket, Pid),
+		    Pid ! Go,
+		    #node_handle{connection_handler = Pid,
+				 socket = Socket,
+				 name = Name};
+		_ ->
+		    exit({unexpected_ssl_node_connected, NodeName})
+	    end;
+	Msg ->
+	    exit({unexpected_msg_instead_of_ssl_node_up, Name, Msg})
+    end.
+
+send_to_ssl_node(#node_handle{connection_handler = Hndlr}, Term) ->
+    Hndlr ! {relay_to_ssl_node, term_to_binary(Term)},
+    ok.
+
+tstsrvr_con_loop(Name, Socket, Parent) ->
+    ok = inet:setopts(Socket,[{active,once}]),
+    receive
+	{relay_to_ssl_node, Data} when is_binary(Data) ->
+	    case gen_tcp:send(Socket, Data) of
+		ok ->
+		    ok;
+		_Error ->
+		    gen_tcp:close(Socket),
+		    exit({failed_to_relay_data_to_ssl_node, Name, Data})
+	    end;
+	{tcp, Socket, Bin} ->
+	    try binary_to_term(Bin) of
+		{format, FmtStr, ArgList} ->
+		    ?t:format(FmtStr, ArgList);
+		{message, Msg} ->
+		    ?t:format("Got message ~p", [Msg]),
+		    Parent ! Msg;
+		{apply_res, To, Ref, Res} ->
+		    To ! {Ref, Res};
+		bye ->
+                    {error, closed} = gen_tcp:recv(Socket, 0),
+		    ?t:format("Ssl node ~s stopped.~n", [Name]),
+		    gen_tcp:close(Socket),
+		    exit(normal);
+		Unknown ->
+		    exit({unexpected_message_from_ssl_node, Name, Unknown})
+            catch
+                error : _ ->
+		    gen_tcp:close(Socket),
+		    exit({bad_data_received_from_ssl_node, Name, Bin})
+	    end;
+	{tcp_closed, Socket} ->
+	    gen_tcp:close(Socket),
+	    exit({lost_connection_with_ssl_node, Name});
+        {'EXIT', Parent, Reason} ->
+            exit({'EXIT', parent, Reason});
+        Unknown ->
+            exit({unknown, Unknown})
+    end,
+    tstsrvr_con_loop(Name, Socket, Parent).
+
+%%
+%% Connection handler ssl_node side
+%%
+
+% cnct2tstsrvr() is called via command line arg -run ...
+cnct2tstsrvr([Host, Port]) when is_list(Host), is_list(Port) ->
+    %% Spawn connection handler on ssl node side
+    ConnHandler
+	= spawn(fun () ->
+			case catch gen_tcp:connect(Host,
+						   list_to_integer(Port),
+						   [binary,
+						    {packet, 4},
+						    {active, false}]) of
+			    {ok, Socket} ->
+				notify_ssl_node_up(Socket),
+				ets:new(test_server_info,
+					[set,
+					 public,
+					 named_table,
+					 {keypos, 1}]),
+				ets:insert(test_server_info,
+					   {test_server_handler, self()}),
+				ssl_node_con_loop(Socket);
+			    Error ->
+				halt("Failed to connect to test server " ++
+					 lists:flatten(io_lib:format("Host:~p ~n Port:~p~n Error:~p~n",
+								     [Host, Port, Error])))
+			end
+		end),
+    spawn(fun () ->
+		  Mon = erlang:monitor(process, ConnHandler),
+		  receive
+		      {'DOWN', Mon, process, ConnHandler, Reason} ->
+			  receive after 1000 -> ok end,
+			  halt("test server connection handler terminated: " ++
+				   lists:flatten(io_lib:format("~p", [Reason])))
+		  end
+	  end).
+
+notify_ssl_node_up(Socket) ->
+    case catch gen_tcp:send(Socket,
+			    term_to_binary({ssl_node_up, node()})) of
+	ok -> ok;
+	_ -> halt("Failed to notify test server that I'm up")
+    end.
+
+send_to_tstsrvr(Term) ->
+    case catch ets:lookup_element(test_server_info, test_server_handler, 2) of
+	Hndlr when is_pid(Hndlr) ->
+	    Hndlr ! {relay_to_test_server, term_to_binary(Term)}, ok;
+	_ ->
+	    receive after 200 -> ok end,
+	    send_to_tstsrvr(Term)
+    end.
+
+ssl_node_con_loop(Socket) ->
+    inet:setopts(Socket,[{active,once}]),
+    receive
+	{relay_to_test_server, Data} when is_binary(Data) ->
+	    case gen_tcp:send(Socket, Data) of
+		ok ->
+		    ok;
+		_Error ->
+		    gen_tcp:close(Socket),
+		    halt("Failed to relay data to test server")
+	    end;
+	{tcp, Socket, Bin} ->
+	    case catch binary_to_term(Bin) of
+		{'EXIT', _} ->
+		    gen_tcp:close(Socket),
+		    halt("test server sent me bad data");
+		{apply, From, Ref, M, F, A} ->
+		    spawn_link(
+		      fun () ->
+			      send_to_tstsrvr({apply_res,
+					       From,
+					       Ref,
+					       (catch apply(M, F, A))})
+			  end);
+		{apply, From, Ref, Fun} ->
+		    spawn_link(fun () ->
+				       send_to_tstsrvr({apply_res,
+							From,
+							Ref,
+							(catch Fun())})
+			       end);
+		stop ->
+		    gen_tcp:send(Socket, term_to_binary(bye)),
+		    init:stop(),
+		    receive after infinity -> ok end;
+		_Unknown ->
+		    halt("test server sent me an unexpected message")
+	    end;
+	{tcp_closed, Socket} ->
+	    halt("Lost connection to test server")
+    end,
+    ssl_node_con_loop(Socket).
diff --git a/lib/ssl/test/ssl_dist_test_lib.hrl b/lib/ssl/test/ssl_dist_test_lib.hrl
new file mode 100644
index 0000000000..86b9b37026
--- /dev/null
+++ b/lib/ssl/test/ssl_dist_test_lib.hrl
@@ -0,0 +1,26 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-record(node_handle,
+	{connection_handler,
+	 socket,
+	 name,
+	 nodename}
+       ).
diff --git a/lib/ssl/test/ssl_engine_SUITE.erl b/lib/ssl/test/ssl_engine_SUITE.erl
new file mode 100644
index 0000000000..71891356e8
--- /dev/null
+++ b/lib/ssl/test/ssl_engine_SUITE.erl
@@ -0,0 +1,147 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+-module(ssl_engine_SUITE).
+
+%% Note: This directive should only be used in test suites.
+-compile(export_all).
+
+-include_lib("common_test/include/ct.hrl").
+-include_lib("public_key/include/public_key.hrl").
+
+%%--------------------------------------------------------------------
+%% Common Test interface functions -----------------------------------
+%%--------------------------------------------------------------------
+all() ->
+    [
+     private_key
+    ].
+
+init_per_suite(Config) ->
+    catch crypto:stop(),
+    try crypto:start() of
+	ok ->
+            case crypto:info_lib() of
+                [{_,_, <<"OpenSSL 1.0.1s-freebsd  1 Mar 2016">>}] ->
+                    {skip, "Problem with engine on OpenSSL 1.0.1s-freebsd"};
+                _ ->
+                    ssl_test_lib:clean_start(),
+                    case crypto:get_test_engine() of
+                         {ok, EngineName} ->
+                            try crypto:engine_load(<<"dynamic">>,
+                                                    [{<<"SO_PATH">>, EngineName},
+                                                     <<"LOAD">>],
+                                                   []) of
+                                {ok, Engine} ->
+                                    [{engine, Engine} |Config];
+                                {error, Reason} ->
+                                    ct:pal("Reason ~p", [Reason]),
+                                    {skip, "No dynamic engine support"}
+                            catch error:notsup ->
+                                    {skip, "No engine support in OpenSSL"}    
+                            end;
+                        {error, notexist} ->
+                            {skip, "Test engine not found"}
+                    end
+            end
+    catch _:_ ->
+	    {skip, "Crypto did not start"}
+    end.
+
+end_per_suite(Config) ->
+    Engine = proplists:get_value(engine, Config),
+    crypto:engine_unload(Engine),
+    ssl:stop(),
+    application:stop(crypto).
+
+
+init_per_testcase(_TestCase, Config) ->
+    ssl:stop(),
+    ssl:start(),
+    ssl_test_lib:ct_log_supported_protocol_versions(Config),
+    ct:timetrap({seconds, 10}),
+    Config.
+
+end_per_testcase(_TestCase, Config) ->     
+    Config.
+
+%%--------------------------------------------------------------------
+%% Test Cases --------------------------------------------------------
+%%--------------------------------------------------------------------
+
+private_key(Config) when is_list(Config) ->
+    ClientFileBase = filename:join([proplists:get_value(priv_dir, Config), "client_engine"]),
+    ServerFileBase = filename:join([proplists:get_value(priv_dir, Config), "server_engine"]),
+    #{server_config := ServerConf,
+      client_config := ClientConf} = GenCertData =
+        public_key:pkix_test_data(#{server_chain => 
+                                        #{root => [{key, ssl_test_lib:hardcode_rsa_key(1)}],
+                                          intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(2)}]],
+                                          peer => [{key, ssl_test_lib:hardcode_rsa_key(3)}
+                                                  ]},
+                                    client_chain => 
+                                        #{root => [{key, ssl_test_lib:hardcode_rsa_key(4)}],
+                                          intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(5)}]],
+                                          peer => [{key, ssl_test_lib:hardcode_rsa_key(6)}]}}),
+    [{server_config, FileServerConf}, 
+     {client_config, FileClientConf}] = 
+        x509_test:gen_pem_config_files(GenCertData, ClientFileBase, ServerFileBase),
+    
+    Engine = proplists:get_value(engine, Config),
+
+    ClientKey = engine_key(FileClientConf),
+    ServerKey = engine_key(FileServerConf),
+
+    EngineClientConf = [{key, #{algorithm => rsa,
+                                engine => Engine,
+                                key_id => ClientKey}} | proplists:delete(key, ClientConf)],
+    
+    EngineServerConf = [{key, #{algorithm => rsa,
+                                engine => Engine,
+                                key_id => ServerKey}} | proplists:delete(key, ServerConf)],
+    %% Test with engine
+    test_tls_connection(EngineServerConf, EngineClientConf, Config),
+    %% Test that sofware fallback is available
+    test_tls_connection(ServerConf, [{reuse_sessions, false} |ClientConf], Config).
+    
+engine_key(Conf) ->
+    FileStr = proplists:get_value(keyfile, Conf),
+    list_to_binary(FileStr).
+    
+
+test_tls_connection(ServerConf, ClientConf, Config) ->
+    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+    
+    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+					{from, self()},
+                                        {mfa, {ssl_test_lib, send_recv_result_active, []}},
+                                        {options, [{verify, verify_peer}
+                                                   | ServerConf]}]),
+    Port  = ssl_test_lib:inet_port(Server),
+    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+					{host, Hostname},
+                                        {from, self()},
+                                        {mfa, {ssl_test_lib, send_recv_result_active, []}},
+                                        {options,  [{verify, verify_peer} | ClientConf]}]),
+    
+    ssl_test_lib:check_result(Server, ok, Client, ok),
+    ssl_test_lib:close(Server),
+    ssl_test_lib:close(Client).
diff --git a/lib/ssl/test/ssl_handshake_SUITE.erl b/lib/ssl/test/ssl_handshake_SUITE.erl
index 9658cb5f56..cd3d972c07 100644
--- a/lib/ssl/test/ssl_handshake_SUITE.erl
+++ b/lib/ssl/test/ssl_handshake_SUITE.erl
@@ -33,7 +33,6 @@
 %% Common Test interface functions -----------------------------------
 %%--------------------------------------------------------------------
 all() -> [decode_hello_handshake,
-          decode_hello_handshake_version_confusion,
 	  decode_single_hello_extension_correctly,
 	  decode_supported_elliptic_curves_hello_extension_correctly,
 	  decode_unknown_hello_extension_correctly,
@@ -101,20 +100,13 @@ decode_hello_handshake(_Config) ->
 	
     Version = {3, 0},
     {Records, _Buffer} = tls_handshake:get_tls_handshake(Version, HelloPacket, <<>>, 
-							 #ssl_options{v2_hello_compatible = false}),
+							 #ssl_options{}),
 
     {Hello, _Data} = hd(Records),
     #renegotiation_info{renegotiated_connection = <<0>>}
 	= (Hello#server_hello.extensions)#hello_extensions.renegotiation_info.
 
 
-decode_hello_handshake_version_confusion(_) -> 
-    HelloPacket = <<3,3,0,0,0,0,0,63,210,235,149,6,244,140,108,13,177,74,16,218,33,108,219,41,73,228,3,82,132,123,73,144,118,100,0,0,32,192,4,0,10,192,45,192,38,0,47,192,18,0,163,0,22,0,165,192,29,192,18,192,30,0,103,0,57,192,48,0,47,1,0>>,
-    Version = {3,3},
-    ClientHello = 1, 
-    Hello = tls_handshake:decode_handshake({3,3}, ClientHello, HelloPacket, false),
-    Hello = tls_handshake:decode_handshake({3,3}, ClientHello, HelloPacket, true).
-
 decode_single_hello_extension_correctly(_Config) -> 
     Renegotiation = <<?UINT16(?RENEGOTIATION_EXT), ?UINT16(1), 0>>,
     Extensions = ssl_handshake:decode_hello_extensions(Renegotiation),
diff --git a/lib/ssl/test/ssl_packet_SUITE.erl b/lib/ssl/test/ssl_packet_SUITE.erl
index 408d62ce9c..3261244ace 100644
--- a/lib/ssl/test/ssl_packet_SUITE.erl
+++ b/lib/ssl/test/ssl_packet_SUITE.erl
@@ -63,8 +63,10 @@ groups() ->
      {'tlsv1.1', [], socket_packet_tests() ++ protocol_packet_tests()},
      {'tlsv1', [], socket_packet_tests() ++ protocol_packet_tests()},
      {'sslv3', [], socket_packet_tests() ++ protocol_packet_tests()},
-     {'dtlsv1.2', [], protocol_packet_tests()},
-     {'dtlsv1', [],  protocol_packet_tests()}
+     %% We will not support any packet types if the transport is
+     %% not reliable. We might support it for DTLS over SCTP in the future 
+     {'dtlsv1.2', [], [reject_packet_opt]},
+     {'dtlsv1', [],  [reject_packet_opt]}
     ].
 
 socket_packet_tests() ->
@@ -1924,6 +1926,25 @@ header_decode_two_bytes_one_sent_passive(Config) when is_list(Config) ->
     ssl_test_lib:close(Client).
 
 %%--------------------------------------------------------------------
+reject_packet_opt() ->
+    [{doc,"Test packet option is rejected for DTLS over udp"}].
+
+reject_packet_opt(Config) when is_list(Config) ->
+
+    ServerOpts = ssl_test_lib:ssl_options(server_opts, Config),
+       
+    {error,{options,{not_supported,{packet,4}}}} = 
+        ssl:listen(9999, [{packet, 4} | ServerOpts]),
+    {error,{options,{not_supported,{packet_size,1}}}} =  
+        ssl:listen(9999, [{packet_size, 1} | ServerOpts]),
+    {error,{options,{not_supported,{header,1}}}} =
+        ssl:listen(9999, [{header, 1} | ServerOpts]),
+    
+    client_reject_packet_opt(Config, {packet,4}),
+    client_reject_packet_opt(Config, {packet_size, 1}),
+    client_reject_packet_opt(Config, {header, 1}).
+
+%%--------------------------------------------------------------------
 %% Internal functions ------------------------------------------------
 %%--------------------------------------------------------------------
 
@@ -2245,3 +2266,23 @@ add_tpkt_header(IOList) when is_list(IOList) ->
     Binary = list_to_binary(IOList),
     L = size(Binary) + 4,
     [3, 0, ((L) bsr 8) band 16#ff, (L) band 16#ff , Binary].
+
+
+client_reject_packet_opt(Config, PacketOpt) ->
+    ServerOpts = ssl_test_lib:ssl_options(server_opts, Config),
+    ClientOpts = ssl_test_lib:ssl_options(client_opts, Config),
+    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+    Server = ssl_test_lib:start_server([{node, ClientNode}, {port, 0},
+                                        {from, self()},
+                                        {mfa, {ssl_test_lib, no_result_msg ,[]}},
+                                        {options, ServerOpts}]),
+    Port = ssl_test_lib:inet_port(Server),
+    Client = ssl_test_lib:start_client_error([{node, ServerNode}, {port, Port},
+                                              {host, Hostname},
+                                              {from, self()},
+                                              {mfa, {ssl_test_lib, no_result_msg, []}},
+                                              {options, [PacketOpt |
+                                                         ClientOpts]}]),
+    
+    ssl_test_lib:check_result(Client, {error, {options, {not_supported, PacketOpt}}}).
diff --git a/lib/ssl/test/ssl_sni_SUITE.erl b/lib/ssl/test/ssl_sni_SUITE.erl
index 03676cb828..7e78c41444 100644
--- a/lib/ssl/test/ssl_sni_SUITE.erl
+++ b/lib/ssl/test/ssl_sni_SUITE.erl
@@ -25,6 +25,8 @@
 
 -include_lib("common_test/include/ct.hrl").
 -include_lib("public_key/include/public_key.hrl").
+-include_lib("kernel/include/inet.hrl").
+
 
 %%--------------------------------------------------------------------
 %% Common Test interface functions -----------------------------------
@@ -55,7 +57,11 @@ sni_tests() ->
      sni_no_match,
      no_sni_header_fun, 
      sni_match_fun, 
-     sni_no_match_fun].
+     sni_no_match_fun,
+     dns_name,
+     ip_fallback,
+     no_ip_fallback,
+     dns_name_reuse].
 
 init_per_suite(Config0) ->
     catch crypto:stop(),
@@ -82,6 +88,13 @@ end_per_suite(_) ->
     ssl:stop(),
     application:stop(crypto).
 
+init_per_testcase(TestCase, Config) when TestCase == ip_fallback;
+                                         TestCase == no_ip_fallback;
+                                         TestCase == dns_name_reuse ->
+    ssl_test_lib:ct_log_supported_protocol_versions(Config),
+    ct:log("Ciphers: ~p~n ", [ ssl:cipher_suites()]),
+    ct:timetrap({seconds, 20}),
+    Config;
 init_per_testcase(_TestCase, Config) ->
     ssl_test_lib:ct_log_supported_protocol_versions(Config),
     ct:log("Ciphers: ~p~n ", [ ssl:cipher_suites()]),
@@ -112,7 +125,119 @@ sni_no_match(Config) ->
 sni_no_match_fun(Config) ->
     run_sni_fun_handshake(Config, "c.server", undefined, "server Peer cert").
 
+dns_name(Config) ->
+    Hostname = "OTP.test.server",
+    #{server_config := ServerConf,
+      client_config := ClientConf} = public_key:pkix_test_data(#{server_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(1)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(2)}]],
+                                                                       peer => [{extensions,  [#'Extension'{extnID = 
+                                                                                                                ?'id-ce-subjectAltName',
+                                                                                                            extnValue = [{dNSName, Hostname}],
+                                                                                                            critical = false}]},
+                                                                                {key, ssl_test_lib:hardcode_rsa_key(3)}]},
+                                                                 client_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(4)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(5)}]],
+                                                                       peer => [{key, ssl_test_lib:hardcode_rsa_key(6)}]}}),
+    unsuccessfull_connect(ServerConf, [{verify, verify_peer} | ClientConf], undefined, Config),
+    successfull_connect(ServerConf, [{verify, verify_peer}, {server_name_indication, Hostname} | ClientConf], undefined, Config),
+    unsuccessfull_connect(ServerConf, [{verify, verify_peer}, {server_name_indication, "foo"} | ClientConf], undefined, Config),
+    successfull_connect(ServerConf, [{verify, verify_peer}, {server_name_indication, disable} | ClientConf], undefined, Config).
+
+ip_fallback(Config) ->
+    Hostname = net_adm:localhost(),
+    {ok, #hostent{h_addr_list = [IP |_]}} = inet:gethostbyname(net_adm:localhost()),
+    IPStr = tuple_to_list(IP),
+    #{server_config := ServerConf,
+      client_config := ClientConf} = public_key:pkix_test_data(#{server_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(1)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(2)}]],
+                                                                       peer => [{extensions, [#'Extension'{extnID = 
+                                                                                                               ?'id-ce-subjectAltName',
+                                                                                                           extnValue = [{dNSName, Hostname},
+                                                                                                                        {iPAddress, IPStr}],
+                                                                                                           critical = false}]},
+                                                                                {key, ssl_test_lib:hardcode_rsa_key(3)}]},
+                                                                 client_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(4)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(5)}]],
+                                                                       peer => [{key, ssl_test_lib:hardcode_rsa_key(6)}]}}),
+    successfull_connect(ServerConf, [{verify, verify_peer} | ClientConf], Hostname, Config),
+    successfull_connect(ServerConf, [{verify, verify_peer} | ClientConf], IP, Config).
+
+no_ip_fallback(Config) ->
+    Hostname = net_adm:localhost(),
+    {ok, #hostent{h_addr_list = [IP |_]}} = inet:gethostbyname(net_adm:localhost()),
+    #{server_config := ServerConf,
+      client_config := ClientConf} = public_key:pkix_test_data(#{server_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(1)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(2)}]],
+                                                                       peer => [{extensions, [#'Extension'{extnID = 
+                                                                                                               ?'id-ce-subjectAltName',
+                                                                                                           extnValue = [{dNSName, Hostname}],
+                                                                                                           critical = false}]},
+                                                                                {key, ssl_test_lib:hardcode_rsa_key(3)}
+                                                                               ]},
+                                                                 client_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(4)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(5)}]],
+                                                                       peer => [{key, ssl_test_lib:hardcode_rsa_key(6)}]}}),
+    successfull_connect(ServerConf, [{verify, verify_peer} | ClientConf], Hostname, Config),
+    unsuccessfull_connect(ServerConf, [{verify, verify_peer} | ClientConf], IP, Config).
 
+dns_name_reuse(Config) ->
+    SNIHostname = "OTP.test.server",
+    #{server_config := ServerConf,
+      client_config := ClientConf} = public_key:pkix_test_data(#{server_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(1)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(2)}]],
+                                                                       peer => [{extensions,  [#'Extension'{extnID = 
+                                                                                                                ?'id-ce-subjectAltName',
+                                                                                                            extnValue = [{dNSName, SNIHostname}],
+                                                                                                            critical = false}
+                                                                                              ]},
+                                                                                {key, ssl_test_lib:hardcode_rsa_key(3)}
+                                                                               ]},
+                                                                 client_chain => 
+                                                                     #{root => [{key, ssl_test_lib:hardcode_rsa_key(4)}],
+                                                                       intermediates => [[{key, ssl_test_lib:hardcode_rsa_key(5)}]],
+                                                                       peer => [{key, ssl_test_lib:hardcode_rsa_key(6)}]}}),
+    
+    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+  
+    unsuccessfull_connect(ServerConf, [{verify, verify_peer} | ClientConf], undefined, Config),
+    
+    Server = 
+	ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
+				   {from, self()},
+				   {mfa, {ssl_test_lib, session_info_result, []}},
+				   {options, ServerConf}]),
+    Port = ssl_test_lib:inet_port(Server),
+    Client0 =
+	ssl_test_lib:start_client([{node, ClientNode}, 
+                                   {port, Port}, {host, Hostname},
+				   {mfa, {ssl_test_lib, no_result, []}},
+                                   {from, self()}, {options, [{verify, verify_peer}, 
+                                                              {server_name_indication, SNIHostname} | ClientConf]}]),   
+    receive
+        {Server, _} ->
+            ok
+    end,
+    
+    Server ! {listen, {mfa, {ssl_test_lib, no_result, []}}},
+    
+    %% Make sure session is registered
+    ct:sleep(1000),
+    
+    Client1 =
+	ssl_test_lib:start_client_error([{node, ClientNode},
+                                         {port, Port}, {host, Hostname},
+                                         {mfa, {ssl_test_lib, session_info_result, []}},
+                                         {from, self()},  {options, [{verify, verify_peer} | ClientConf]}]),
+    
+    ssl_test_lib:check_result(Client1, {error, {tls_alert, "handshake failure"}}),
+    ssl_test_lib:close(Client0).
 %%--------------------------------------------------------------------
 %% Internal Functions ------------------------------------------------
 %%--------------------------------------------------------------------
@@ -217,3 +342,37 @@ run_handshake(Config, SNIHostname, ExpectedSNIHostname, ExpectedCN) ->
     ssl_test_lib:check_result(Server, ExpectedSNIHostname, Client, ExpectedCN),
     ssl_test_lib:close(Server),
     ssl_test_lib:close(Client).
+
+successfull_connect(ServerOptions, ClientOptions, Hostname0, Config) ->  
+    {ClientNode, ServerNode, Hostname1} = ssl_test_lib:run_where(Config),
+    Hostname = host_name(Hostname0, Hostname1),
+    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+                                        {from, self()}, {mfa, {ssl_test_lib, send_recv_result_active, []}},
+                                        {options, ServerOptions}]),
+    Port = ssl_test_lib:inet_port(Server),
+    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+                                        {host, Hostname}, {from, self()},
+                                        {mfa, {ssl_test_lib, send_recv_result_active, []}},
+                                        {options, ClientOptions}]),
+    ssl_test_lib:check_result(Server, ok, Client, ok),
+    ssl_test_lib:close(Server),
+    ssl_test_lib:close(Client).
+
+unsuccessfull_connect(ServerOptions, ClientOptions, Hostname0, Config) ->
+    {ClientNode, ServerNode, Hostname1} = ssl_test_lib:run_where(Config),
+    Hostname = host_name(Hostname0, Hostname1),
+    Server = ssl_test_lib:start_server_error([{node, ServerNode}, {port, 0},
+					      {from, self()},
+					      {options, ServerOptions}]),
+    Port = ssl_test_lib:inet_port(Server),
+    Client = ssl_test_lib:start_client_error([{node, ClientNode}, {port, Port},
+					      {host, Hostname},
+					      {from, self()}, 
+					      {options, ClientOptions}]),
+    
+    ssl_test_lib:check_result(Server, {error, {tls_alert, "handshake failure"}},
+			      Client, {error, {tls_alert, "handshake failure"}}).
+host_name(undefined, Hostname) ->
+    Hostname;
+host_name(Hostname, _) ->
+    Hostname.
diff --git a/lib/ssl/test/ssl_test_lib.erl b/lib/ssl/test/ssl_test_lib.erl
index 4e7252f469..26ef311615 100644
--- a/lib/ssl/test/ssl_test_lib.erl
+++ b/lib/ssl/test/ssl_test_lib.erl
@@ -1025,48 +1025,60 @@ string_regex_filter(_Str, _Search) ->
     false.
 
 anonymous_suites(Version) ->
-    Suites = [ssl_cipher:erl_suite_definition(S) || S <- ssl_cipher:anonymous_suites(Version)],
-    ssl_cipher:filter_suites(Suites).
-
+    ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <- ssl_cipher:anonymous_suites(Version)],[]).
 psk_suites(Version) ->
-    Suites = [ssl_cipher:erl_suite_definition(S) || S <- ssl_cipher:psk_suites(Version)],
-    ssl_cipher:filter_suites(Suites).
+    ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <- ssl_cipher:psk_suites(Version)], []).
 
 psk_anon_suites(Version) ->
-    Suites = [Suite || Suite <- psk_suites(Version), is_psk_anon_suite(Suite)],
-    ssl_cipher:filter_suites(Suites).
+    ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <- ssl_cipher:psk_suites_anon(Version)], 
+                             [{key_exchange, 
+                               fun(psk) -> 
+                                       true;
+                                  (psk_dhe) -> 
+                                       true;
+                                  (_) -> 
+                                       false 
+                               end}]).
 
 srp_suites() ->
-    Suites =
-	[{srp_anon, '3des_ede_cbc', sha},
-	 {srp_rsa, '3des_ede_cbc', sha},
-	 {srp_anon, aes_128_cbc, sha},
-	 {srp_rsa, aes_128_cbc, sha},
-	 {srp_anon, aes_256_cbc, sha},
-	 {srp_rsa, aes_256_cbc, sha}],
-    ssl_cipher:filter_suites(Suites).
-
+    ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <- ssl_cipher:srp_suites()],
+                             [{key_exchange, 
+                               fun(srp_rsa) -> 
+                                       true;
+                                  (_) -> 
+                                       false 
+                               end}]).
 srp_anon_suites() ->
-    Suites =
-	[{srp_anon, '3des_ede_cbc', sha},
-	 {srp_anon, aes_128_cbc, sha},
-	 {srp_anon, aes_256_cbc, sha}],
-    ssl_cipher:filter_suites(Suites).
-
+    ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <-  ssl_cipher:srp_suites_anon()],
+                             []).
 srp_dss_suites() ->
-    Suites =
-	[{srp_dss, '3des_ede_cbc', sha},
-	 {srp_dss, aes_128_cbc, sha},
-	 {srp_dss, aes_256_cbc, sha}],
-    ssl_cipher:filter_suites(Suites).
+    ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <- ssl_cipher:srp_suites()], 
+                             [{key_exchange, 
+                               fun(srp_dss) -> 
+                                       true;
+                                  (_) -> 
+                                       false 
+                               end}]).
+chacha_suites(Version) ->
+    [ssl_cipher:erl_suite_definition(S) || S <- ssl_cipher:filter_suites(ssl_cipher:chacha_suites(Version))].
+
 
 rc4_suites(Version) ->
-    Suites = [ssl_cipher:erl_suite_definition(S) || S <- ssl_cipher:rc4_suites(Version)],
-    ssl_cipher:filter_suites(Suites).
+     ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <-ssl_cipher:rc4_suites(Version)], []).
 
 des_suites(Version) ->
-    Suites = ssl_cipher:des_suites(Version),
-    ssl_cipher:filter_suites(Suites).
+     ssl:filter_cipher_suites([ssl_cipher:suite_definition(S) || S <-ssl_cipher:des_suites(Version)], []).
+
+tuple_to_map({Kex, Cipher, Mac}) ->
+    #{key_exchange => Kex,
+      cipher => Cipher,
+      mac => Mac,
+      prf => default_prf};
+tuple_to_map({Kex, Cipher, Mac, Prf}) ->
+    #{key_exchange => Kex,
+      cipher => Cipher,
+      mac => Mac,
+      prf => Prf}.
 
 pem_to_der(File) ->
     {ok, PemBin} = file:read_file(File),
@@ -1292,6 +1304,32 @@ cipher_restriction(Config0) ->
 	    Config0
     end.
 
+openssl_dsa_support() ->
+    case os:cmd("openssl version") of
+        "LibreSSL 2.6.1" ++ _ ->
+            true;
+        "LibreSSL 2.6.2" ++ _ ->
+            true;
+        "LibreSSL 2.6" ++ _ ->
+            false;
+        "LibreSSL 2.4" ++ _ ->
+            true;
+        "LibreSSL 2.3" ++ _ ->
+            true;
+        "LibreSSL 2.2" ++ _ ->
+            true;
+        "LibreSSL 2.1" ++ _ ->
+            true;
+        "LibreSSL 2.0" ++ _ ->
+            true;
+        "LibreSSL"  ++ _ ->
+            false;
+        "OpenSSL 1.0.1" ++ Rest ->
+            hd(Rest) >= s;
+        _ ->
+            true
+    end.
+
 check_sane_openssl_version(Version) ->
     case supports_ssl_tls_version(Version) of 
 	true ->
@@ -1329,8 +1367,9 @@ enough_openssl_crl_support(_) -> true.
 
 wait_for_openssl_server(Port, tls) ->
     do_wait_for_openssl_tls_server(Port, 10);
-wait_for_openssl_server(Port, dtls) ->
-    do_wait_for_openssl_dtls_server(Port, 10).
+wait_for_openssl_server(_Port, dtls) ->
+    ok. %% No need to wait for DTLS over UDP server
+        %% client will retransmitt until it is up.
 
 do_wait_for_openssl_tls_server(_, 0) ->
     exit(failed_to_connect_to_openssl);
@@ -1343,21 +1382,6 @@ do_wait_for_openssl_tls_server(Port, N) ->
 	    do_wait_for_openssl_tls_server(Port, N-1)
     end.
 
-do_wait_for_openssl_dtls_server(_, 0) ->
-    %%exit(failed_to_connect_to_openssl);
-    ok;
-do_wait_for_openssl_dtls_server(Port, N) ->
-    %% case gen_udp:open(0) of
-    %%     {ok, S} ->
-    %%         gen_udp:connect(S, "localhost", Port),
-    %%         gen_udp:close(S);
-    %%     _  ->
-    %%         ct:sleep(?SLEEP),
-    %%         do_wait_for_openssl_dtls_server(Port, N-1)
-    %% end.
-    ct:sleep(500),
-    do_wait_for_openssl_dtls_server(Port, N-1).
-
 version_flag(tlsv1) ->
     "-tls1";
 version_flag('tlsv1.1') ->
@@ -1384,7 +1408,9 @@ filter_suites(Ciphers0, AtomVersion) ->
     Supported0 = ssl_cipher:suites(Version)
 	++ ssl_cipher:anonymous_suites(Version)
 	++ ssl_cipher:psk_suites(Version)
+        ++ ssl_cipher:psk_suites_anon(Version)
 	++ ssl_cipher:srp_suites() 
+        ++ ssl_cipher:srp_suites_anon() 
 	++ ssl_cipher:rc4_suites(Version),
     Supported1 = ssl_cipher:filter_suites(Supported0),
     Supported2 = [ssl_cipher:erl_suite_definition(S) || S <- Supported1],
@@ -1658,78 +1684,3 @@ hardcode_dsa_key(3) ->
        y =  48598545580251057979126570873881530215432219542526130654707948736559463436274835406081281466091739849794036308281564299754438126857606949027748889019480936572605967021944405048011118039171039273602705998112739400664375208228641666852589396502386172780433510070337359132965412405544709871654840859752776060358,
        x = 1457508827177594730669011716588605181448418352823}.
 
-dtls_hello() ->
-    [1,
-     <<0,1,4>>,
-     <<0,0>>,
-     <<0,0,0>>,
-     <<0,1,4>>,
-     <<254,253,88,
-       156,129,61,
-       131,216,15,
-       131,194,242,
-       46,154,190,
-       20,228,234,
-       234,150,44,
-       62,96,96,103,
-       127,95,103,
-       23,24,42,138,
-       13,142,32,57,
-       230,177,32,
-       210,154,152,
-       188,121,134,
-       136,53,105,
-       118,96,106,
-       103,231,223,
-       133,10,165,
-       50,32,211,
-       227,193,14,
-       181,143,48,
-       66,0,0,100,0,
-       255,192,44,
-       192,48,192,
-       36,192,40,
-       192,46,192,
-       50,192,38,
-       192,42,0,159,
-       0,163,0,107,
-       0,106,0,157,
-       0,61,192,43,
-       192,47,192,
-       35,192,39,
-       192,45,192,
-       49,192,37,
-       192,41,0,158,
-       0,162,0,103,
-       0,64,0,156,0,
-       60,192,10,
-       192,20,0,57,
-       0,56,192,5,
-       192,15,0,53,
-       192,8,192,18,
-       0,22,0,19,
-       192,3,192,13,
-       0,10,192,9,
-       192,19,0,51,
-       0,50,192,4,
-       192,14,0,47,
-       1,0,0,86,0,0,
-       0,14,0,12,0,
-       0,9,108,111,
-       99,97,108,
-       104,111,115,
-       116,0,10,0,
-       58,0,56,0,14,
-       0,13,0,25,0,
-       28,0,11,0,12,
-       0,27,0,24,0,
-       9,0,10,0,26,
-       0,22,0,23,0,
-       8,0,6,0,7,0,
-       20,0,21,0,4,
-       0,5,0,18,0,
-       19,0,1,0,2,0,
-       3,0,15,0,16,
-       0,17,0,11,0,
-       2,1,0>>].
-
diff --git a/lib/ssl/test/ssl_to_openssl_SUITE.erl b/lib/ssl/test/ssl_to_openssl_SUITE.erl
index 9118e4b7e3..e8cbf857ef 100644
--- a/lib/ssl/test/ssl_to_openssl_SUITE.erl
+++ b/lib/ssl/test/ssl_to_openssl_SUITE.erl
@@ -51,17 +51,16 @@ groups() ->
     [{basic, [], basic_tests()},
      {'tlsv1.2', [], all_versions_tests() ++ alpn_tests() ++ npn_tests() ++ sni_server_tests()},
      {'tlsv1.1', [], all_versions_tests() ++ alpn_tests() ++ npn_tests() ++ sni_server_tests()},
-     {'tlsv1', [], all_versions_tests()++ alpn_tests() ++ npn_tests() ++ sni_server_tests()},
-     {'sslv3', [], all_versions_tests()},
-     {'dtlsv1.2', [], dtls_all_versions_tests()},
-     {'dtlsv1', [], dtls_all_versions_tests()}
-    ].
+      {'tlsv1', [], all_versions_tests()++ alpn_tests() ++ npn_tests() ++ sni_server_tests()},
+      {'sslv3', [], all_versions_tests()},
+      {'dtlsv1.2', [], dtls_all_versions_tests()},
+      {'dtlsv1', [], dtls_all_versions_tests()}
+     ].
 
 basic_tests() ->
     [basic_erlang_client_openssl_server,
      basic_erlang_server_openssl_client,
-     expired_session,
-     ssl2_erlang_server_openssl_client_comp
+     expired_session
     ].
 
 all_versions_tests() ->
@@ -70,6 +69,9 @@ all_versions_tests() ->
      erlang_server_openssl_client,
      erlang_client_openssl_server_dsa_cert,
      erlang_server_openssl_client_dsa_cert,
+     erlang_client_openssl_server_anon,
+     erlang_server_openssl_client_anon,
+     erlang_server_openssl_client_anon_with_cert,
      erlang_server_openssl_client_reuse_session,
      erlang_client_openssl_server_renegotiate,
      erlang_client_openssl_server_nowrap_seqnum,
@@ -89,6 +91,9 @@ dtls_all_versions_tests() ->
      erlang_server_openssl_client,
      erlang_client_openssl_server_dsa_cert,
      erlang_server_openssl_client_dsa_cert,
+     erlang_client_openssl_server_anon,
+     erlang_server_openssl_client_anon,
+     erlang_server_openssl_client_anon_with_cert,
      erlang_server_openssl_client_reuse_session,
      erlang_client_openssl_server_renegotiate,
      erlang_client_openssl_server_nowrap_seqnum,
@@ -135,21 +140,26 @@ sni_server_tests() ->
 
 init_per_suite(Config0) ->
     case os:find_executable("openssl") of
-	false ->
-	    {skip, "Openssl not found"};
-	_ ->
-	    ct:pal("Version: ~p", [os:cmd("openssl version")]),
-	    catch crypto:stop(),
-	    try crypto:start() of
-		ok ->
+        false ->
+            {skip, "Openssl not found"};
+        _ ->
+            ct:pal("Version: ~p", [os:cmd("openssl version")]),
+            catch crypto:stop(),
+            try crypto:start() of
+                ok ->
                     ssl_test_lib:clean_start(),
-                  
-                    Config1 = ssl_test_lib:make_rsa_cert(Config0),
-                    Config2 = ssl_test_lib:make_dsa_cert(Config1),
-                    ssl_test_lib:cipher_restriction(Config2)
-		catch _:_  ->
-		    {skip, "Crypto did not start"}
-	    end
+                    Config = 
+                        case ssl_test_lib:openssl_dsa_support() of
+                            true ->
+                                Config1 = ssl_test_lib:make_rsa_cert(Config0),
+                                ssl_test_lib:make_dsa_cert(Config1);
+                            false ->
+                                ssl_test_lib:make_rsa_cert(Config0)
+                        end,
+                    ssl_test_lib:cipher_restriction(Config)
+            catch _:_  ->
+                    {skip, "Crypto did not start"}
+            end
     end.
 
 end_per_suite(_Config) ->
@@ -157,39 +167,34 @@ end_per_suite(_Config) ->
     application:stop(crypto).
 
 init_per_group(basic, Config0) ->
-    Config = ssl_test_lib:clean_tls_version(Config0),
-    case ssl_test_lib:supports_ssl_tls_version(sslv2) of
-	true ->
-	    [{v2_hello_compatible, true} | Config];
-	false ->
-	    [{v2_hello_compatible, false} | Config]
-    end;
+    ssl_test_lib:clean_tls_version(Config0);
+
 init_per_group(GroupName, Config) ->
     case ssl_test_lib:is_tls_version(GroupName) of
-	true ->
+        true ->
             case ssl_test_lib:supports_ssl_tls_version(GroupName) of
-                true ->
+                 true ->
                     case ssl_test_lib:check_sane_openssl_version(GroupName) of
-                        true ->
+                         true ->
                             ssl_test_lib:init_tls_version(GroupName, Config);
-                        false ->
+                         false ->
                             {skip, openssl_does_not_support_version}
                     end;
                 false ->
                     {skip, openssl_does_not_support_version}
             end; 
-        _ ->
-	    ssl:start(),
-	    Config
+         _ ->
+            ssl:start(),
+            Config
     end.
 
 end_per_group(GroupName, Config) ->
-  case ssl_test_lib:is_tls_version(GroupName) of
-      true ->
-          ssl_test_lib:clean_tls_version(Config);
-      false ->
-          Config
-  end.
+    case ssl_test_lib:is_tls_version(GroupName) of
+        true ->
+            ssl_test_lib:clean_tls_version(Config);
+       false ->
+            Config
+    end.
 
 init_per_testcase(expired_session, Config) ->
     ct:timetrap(?EXPIRE * 1000 * 5),
@@ -197,83 +202,94 @@ init_per_testcase(expired_session, Config) ->
     application:load(ssl),
     application:set_env(ssl, session_lifetime, ?EXPIRE),
     ssl:start(),
-    Config;
-
-init_per_testcase(TestCase, Config) when TestCase == ciphers_rsa_signed_certs;
-					 TestCase == ciphers_dsa_signed_certs ->
-    ct:timetrap({seconds, 60}),
-    special_init(TestCase, Config);
-
+     Config;
+
+init_per_testcase(TestCase, Config) when 
+      TestCase == ciphers_dsa_signed_certs;
+      TestCase ==  erlang_client_openssl_server_dsa_cert;
+      TestCase == erlang_server_openssl_client_dsa_cert;
+       TestCase == erlang_client_openssl_server_dsa_cert;
+      TestCase ==  erlang_server_openssl_client_dsa_cert ->
+    case ssl_test_lib:openssl_dsa_support() of
+        true ->
+            special_init(TestCase, Config);
+        false ->
+            {skip, "DSA not supported by OpenSSL"}
+    end; 
 init_per_testcase(TestCase, Config) ->
-    ct:timetrap({seconds, 20}),
+    ct:timetrap({seconds, 35}),
     special_init(TestCase, Config).
 
+special_init(TestCase, Config) when 
+      TestCase == ciphers_rsa_signed_certs;
+      TestCase == ciphers_dsa_signed_certs->
+    ct:timetrap({seconds, 90}),
+    Config;
 special_init(TestCase, Config)
   when TestCase == erlang_client_openssl_server_renegotiate;
-       TestCase == erlang_client_openssl_server_nowrap_seqnum;
+        TestCase == erlang_client_openssl_server_nowrap_seqnum;
        TestCase == erlang_server_openssl_client_nowrap_seqnum
-       ->
+        ->
     {ok, Version} = application:get_env(ssl, protocol_version),
     check_sane_openssl_renegotaite(Config, Version);
 
-special_init(Case, Config) when Case == ssl2_erlang_server_openssl_client;
-				Case == ssl2_erlang_server_openssl_client_comp ->
+special_init(ssl2_erlang_server_openssl_client, Config) ->
     case ssl_test_lib:supports_ssl_tls_version(sslv2) of
-	true ->
-	     Config;
-	false ->
-	     {skip, "sslv2 not supported by openssl"}
-    end;
+        true ->
+            Config;
+        false ->
+            {skip, "sslv2 not supported by openssl"}
+     end;
 
 special_init(TestCase, Config)
-    when TestCase == erlang_client_alpn_openssl_server_alpn;
-         TestCase == erlang_server_alpn_openssl_client_alpn;
-         TestCase == erlang_client_alpn_openssl_server;
-         TestCase == erlang_client_openssl_server_alpn;
-         TestCase == erlang_server_alpn_openssl_client;
-         TestCase == erlang_server_openssl_client_alpn ->
+     when TestCase == erlang_client_alpn_openssl_server_alpn;
+          TestCase == erlang_server_alpn_openssl_client_alpn;
+          TestCase == erlang_client_alpn_openssl_server;
+          TestCase == erlang_client_openssl_server_alpn;
+          TestCase == erlang_server_alpn_openssl_client;
+          TestCase == erlang_server_openssl_client_alpn ->
     check_openssl_alpn_support(Config);
 
 special_init(TestCase, Config)
-    when TestCase == erlang_client_alpn_openssl_server_alpn_renegotiate;
-         TestCase == erlang_server_alpn_openssl_client_alpn_renegotiate ->
-    {ok, Version} = application:get_env(ssl, protocol_version),
-    case check_sane_openssl_renegotaite(Config, Version) of
-	{skip, _} = Skip ->
-	    Skip;
-	_ ->
-	    check_openssl_alpn_support(Config)
-    end;
+     when TestCase == erlang_client_alpn_openssl_server_alpn_renegotiate;
+          TestCase == erlang_server_alpn_openssl_client_alpn_renegotiate ->
+     {ok, Version} = application:get_env(ssl, protocol_version),
+     case check_sane_openssl_renegotaite(Config, Version) of
+         {skip, _} = Skip ->
+             Skip;
+         _ ->
+             check_openssl_alpn_support(Config)
+     end;
 
 special_init(TestCase, Config)
-    when TestCase == erlang_client_alpn_npn_openssl_server_alpn_npn;
-         TestCase == erlang_server_alpn_npn_openssl_client_alpn_npn ->
+  when TestCase == erlang_client_alpn_npn_openssl_server_alpn_npn;
+       TestCase == erlang_server_alpn_npn_openssl_client_alpn_npn ->
     case check_openssl_alpn_support(Config) of
         {skip, _} = Skip ->
             Skip;
         _ ->
-            check_openssl_npn_support(Config)
+             check_openssl_npn_support(Config)
     end;
 
 special_init(TestCase, Config)
-    when TestCase == erlang_client_openssl_server_npn;
-         TestCase == erlang_server_openssl_client_npn;        
-         TestCase == erlang_server_openssl_client_npn_only_server;
-         TestCase == erlang_server_openssl_client_npn_only_client;
-         TestCase == erlang_client_openssl_server_npn_only_client;
-         TestCase == erlang_client_openssl_server_npn_only_server ->
+  when TestCase == erlang_client_openssl_server_npn;
+       TestCase == erlang_server_openssl_client_npn;
+       TestCase == erlang_server_openssl_client_npn_only_server;
+       TestCase == erlang_server_openssl_client_npn_only_client;
+       TestCase == erlang_client_openssl_server_npn_only_client;
+       TestCase == erlang_client_openssl_server_npn_only_server ->
     check_openssl_npn_support(Config);
 
 special_init(TestCase, Config)
   when TestCase == erlang_server_openssl_client_npn_renegotiate;
        TestCase == erlang_client_openssl_server_npn_renegotiate ->
     {ok, Version} = application:get_env(ssl, protocol_version),
-    case check_sane_openssl_renegotaite(Config, Version) of
-	{skip, _} = Skip ->
-	    Skip;
-	_ -> 
-	    check_openssl_npn_support(Config)
-    end;
+     case check_sane_openssl_renegotaite(Config, Version) of
+         {skip, _} = Skip ->
+             Skip;
+         _ ->
+             check_openssl_npn_support(Config)
+     end;
 
 special_init(TestCase, Config0)
   when TestCase == erlang_server_openssl_client_sni_match;
@@ -282,25 +298,25 @@ special_init(TestCase, Config0)
        TestCase == erlang_server_openssl_client_sni_match_fun;
        TestCase == erlang_server_openssl_client_sni_no_match_fun;
        TestCase == erlang_server_openssl_client_sni_no_header_fun ->
-    RsaOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config0),
+     RsaOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config0),
     Config = [{sni_server_opts, [{sni_hosts,
                                   [{"a.server", [
                                                  {certfile, proplists:get_value(certfile, RsaOpts)},
                                                  {keyfile,  proplists:get_value(keyfile, RsaOpts)}
                                                 ]},
                                    {"b.server", [
-                                                 {certfile, proplists:get_value(certfile, RsaOpts)},
+                                                  {certfile, proplists:get_value(certfile, RsaOpts)},
                                                  {keyfile, proplists:get_value(keyfile, RsaOpts)}
                                                 ]}
                                   ]}]} | Config0], 
     check_openssl_sni_support(Config);
 
 special_init(_, Config) ->
-    Config.
+     Config.
 
 end_per_testcase(reuse_session_expired, Config) ->
     application:unset_env(ssl, session_lifetime),
-    Config;
+     Config;
 end_per_testcase(_, Config) ->
     Config.
 
@@ -323,8 +339,8 @@ basic_erlang_client_openssl_server(Config) when is_list(Config) ->
     KeyFile = proplists:get_value(keyfile, ServerOpts),
 
     Exe = "openssl",
-    Args = ["s_server", "-accept", integer_to_list(Port), 
-	    "-cert", CertFile, "-key", KeyFile], 
+     Args = ["s_server", "-accept", integer_to_list(Port),
+             "-cert", CertFile, "-key", KeyFile],
 
     OpensslPort = ssl_test_lib:portable_open_port(Exe, Args), 
 
@@ -332,15 +348,15 @@ basic_erlang_client_openssl_server(Config) when is_list(Config) ->
     ssl_test_lib:wait_for_openssl_server(Port, tls),
 
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       erlang_ssl_receive, [Data]}},
-					{options, ClientOpts}]),
+                                         {host, Hostname},
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                               erlang_ssl_receive, [Data]}},
+                                         {options, ClientOpts}]),
     true = port_command(OpensslPort, Data),
     
     ssl_test_lib:check_result(Client, ok),
-  
+
     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close_port(OpensslPort),
     ssl_test_lib:close(Client),
@@ -352,23 +368,20 @@ basic_erlang_server_openssl_client() ->
 basic_erlang_server_openssl_client(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
     ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
-    V2Compat = proplists:get_value(v2_hello_compatible, Config), 
 
     {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
     
     Data = "From openssl to erlang",
-    ct:pal("v2_hello_compatible: ~p", [V2Compat]),
-
     Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
-					{from, self()}, 
-					{mfa, {?MODULE, erlang_ssl_receive, [Data]}},
-					{options,[{v2_hello_compatible, V2Compat} | ServerOpts]}]),
+                                        {from, self()},
+                                        {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
+                                        {options,ServerOpts}]),
 
     Port = ssl_test_lib:inet_port(Server),
     
     Exe = "openssl",
     Args = ["s_client", "-connect", hostname_format(Hostname) ++
-                ":" ++ integer_to_list(Port) | workaround_openssl_s_clinent()],
+                ":" ++ integer_to_list(Port) ++ no_v2_flag() | workaround_openssl_s_clinent()],
     
     OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args), 
     true = port_command(OpenSslPort, Data),
@@ -398,19 +411,19 @@ erlang_client_openssl_server(Config) when is_list(Config) ->
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port),
-	    ssl_test_lib:version_flag(Version), 
-	    "-cert", CertFile, "-key", KeyFile],
-	
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile, "-key", KeyFile],
+
     OpensslPort =  ssl_test_lib:portable_open_port(Exe, Args), 
 
     ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
 
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       erlang_ssl_receive, [Data]}},
-					{options, ClientOpts}]),
+                                        {host, Hostname},
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                                erlang_ssl_receive, [Data]}},
+                                        {options, ClientOpts}]),
     true = port_command(OpensslPort, Data),
     
     ssl_test_lib:check_result(Client, ok),
@@ -426,24 +439,24 @@ erlang_server_openssl_client() ->
 erlang_server_openssl_client(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
     ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
-
-    {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
     
+    {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
     Data = "From openssl to erlang",
 
     Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
-					{from, self()}, 
-			   {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
-			   {options, ServerOpts}]),
+                                         {from, self()},
+                                        {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
+                                        {options, ServerOpts}]),
     Port = ssl_test_lib:inet_port(Server),
     Version = ssl_test_lib:protocol_version(Config),
 
     Exe = "openssl",
     Args = ["s_client", "-connect", hostname_format(Hostname) ++":" ++ integer_to_list(Port), 
-	    ssl_test_lib:version_flag(Version)],
-
-    OpenSslPort =  ssl_test_lib:portable_open_port(Exe, Args), 
+             ssl_test_lib:version_flag(Version)],
     
+    OpenSslPort =  ssl_test_lib:portable_open_port(Exe, Args),
+
     true = port_command(OpenSslPort, Data),
     
     ssl_test_lib:check_result(Server, ok),
@@ -460,8 +473,8 @@ erlang_client_openssl_server_dsa_cert(Config) when is_list(Config) ->
     ClientOpts = ssl_test_lib:ssl_options(client_dsa_opts, Config),
     ServerOpts = ssl_test_lib:ssl_options(server_dsa_verify_opts, Config),
 
-    {ClientNode, _, Hostname} = ssl_test_lib:run_where(Config),
-  
+     {ClientNode, _, Hostname} = ssl_test_lib:run_where(Config),
+
     Data = "From openssl to erlang",
 
     Port = ssl_test_lib:inet_port(node()),
@@ -471,27 +484,27 @@ erlang_client_openssl_server_dsa_cert(Config) when is_list(Config) ->
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port),
-	    ssl_test_lib:version_flag(Version),
-	    "-cert", CertFile, "-CAfile", CaCertFile,  
-	    "-key", KeyFile, "-Verify", "2", "-msg"],
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile, "-CAfile", CaCertFile,
+             "-key", KeyFile, "-Verify", "2", "-msg"],
 
     OpensslPort =  ssl_test_lib:portable_open_port(Exe, Args), 
 
     ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
 
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       erlang_ssl_receive, [Data]}},
-					{options, ClientOpts}]),
+                                        {host, Hostname},
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                               erlang_ssl_receive, [Data]}},
+                                        {options, ClientOpts}]),
 
     true = port_command(OpensslPort, Data),
     
-    ssl_test_lib:check_result(Client, ok), 
-   
+     ssl_test_lib:check_result(Client, ok),
+
     %% Clean close down!   Server needs to be closed first !!
-    ssl_test_lib:close_port(OpensslPort),
+     ssl_test_lib:close_port(OpensslPort),
     ssl_test_lib:close(Client),
     process_flag(trap_exit, false),
     ok.
@@ -511,17 +524,17 @@ erlang_server_openssl_client_dsa_cert(Config) when is_list(Config) ->
     KeyFile = proplists:get_value(keyfile, ClientOpts),
 
     Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
-                                       {from, self()},
-                          {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
-                          {options, ServerOpts}]),
+                                        {from, self()},
+                                        {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
+                                        {options, ServerOpts}]),
     Port = ssl_test_lib:inet_port(Server),
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_client", "-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port),
-	    ssl_test_lib:version_flag(Version),
-	    "-cert", CertFile,
-	    "-CAfile", CaCertFile,
-	    "-key", KeyFile, "-msg"],
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile,
+            "-CAfile", CaCertFile,
+            "-key", KeyFile, "-msg"],
 
     OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args), 
     true = port_command(OpenSslPort, Data),
@@ -533,11 +546,124 @@ erlang_server_openssl_client_dsa_cert(Config) when is_list(Config) ->
     ssl_test_lib:close_port(OpenSslPort),
     process_flag(trap_exit, false).
 
-%%-------------------------------------------------------------------- 
+ %%--------------------------------------------------------------------
+erlang_client_openssl_server_anon() ->
+     [{doc,"Test erlang client with openssl server, anonymous"}].
+erlang_client_openssl_server_anon(Config) when is_list(Config) ->
+     process_flag(trap_exit, true),
+    %% OpenSSL expects a certificate and key, even if the cipher spec
+    %% is restructed to aNULL, so we use 'server_rsa_opts' here
+    ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
+    ClientOpts = ssl_test_lib:ssl_options(client_anon_opts, Config),
+    VersionTuple = ssl_test_lib:protocol_version(Config, tuple),
+    Ciphers = ssl_test_lib:anonymous_suites(VersionTuple),
+
+    {ClientNode, _, Hostname} = ssl_test_lib:run_where(Config),
+
+    Data = "From openssl to erlang",
+
+    Port = ssl_test_lib:inet_port(node()),
+    CertFile = proplists:get_value(certfile, ServerOpts),
+    KeyFile = proplists:get_value(keyfile, ServerOpts),
+    Version = ssl_test_lib:protocol_version(Config),
+    Exe = "openssl",
+    Args = ["s_server", "-accept", integer_to_list(Port),
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile, "-key", KeyFile,
+            "-cipher", "aNULL", "-msg"],
+
+    OpensslPort =  ssl_test_lib:portable_open_port(Exe, Args),
+
+    ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
+
+     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+                                         {host, Hostname},
+                                         {from, self()},
+                                         {mfa, {?MODULE,
+                                                erlang_ssl_receive, [Data]}},
+                                         {options, [{ciphers, Ciphers} | ClientOpts]}]),
+
+    true = port_command(OpensslPort, Data),
+
+    ssl_test_lib:check_result(Client, ok),
+
+    %% Clean close down!   Server needs to be closed first !!
+     ssl_test_lib:close_port(OpensslPort),
+    ssl_test_lib:close(Client),
+    process_flag(trap_exit, false),
+    ok.
+%%--------------------------------------------------------------------
+erlang_server_openssl_client_anon() ->
+    [{doc,"Test erlang server with openssl client, anonymous"}].
+erlang_server_openssl_client_anon(Config) when is_list(Config) ->
+    process_flag(trap_exit, true),
+    ServerOpts = ssl_test_lib:ssl_options(server_anon_opts, Config),
+    VersionTuple = ssl_test_lib:protocol_version(Config, tuple),
+    Ciphers = ssl_test_lib:anonymous_suites(VersionTuple),
+
+    {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+    Data = "From openssl to erlang",
+
+    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+                                        {from, self()},
+                                        {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
+                                        {options, [{ciphers, Ciphers} | ServerOpts]}]),
+    Port = ssl_test_lib:inet_port(Server),
+    Version = ssl_test_lib:protocol_version(Config),
+    Exe = "openssl",
+    Args = ["s_client", "-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port),
+             ssl_test_lib:version_flag(Version),
+            "-cipher", "aNULL", "-msg"],
+
+    OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args),
+    true = port_command(OpenSslPort, Data),
+
+     ssl_test_lib:check_result(Server, ok),
+
+    %% Clean close down!   Server needs to be closed first !!
+     ssl_test_lib:close(Server),
+    ssl_test_lib:close_port(OpenSslPort),
+    process_flag(trap_exit, false).
+
+%%--------------------------------------------------------------------
+erlang_server_openssl_client_anon_with_cert() ->
+     [{doc,"Test erlang server with openssl client, anonymous (with cert)"}].
+erlang_server_openssl_client_anon_with_cert(Config) when is_list(Config) ->
+    process_flag(trap_exit, true),
+    ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
+    VersionTuple = ssl_test_lib:protocol_version(Config, tuple),
+    Ciphers = ssl_test_lib:anonymous_suites(VersionTuple),
+
+    {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+    Data = "From openssl to erlang",
+
+    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+                                        {from, self()},
+                                        {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
+                                        {options, [{ciphers, Ciphers} | ServerOpts]}]),
+    Port = ssl_test_lib:inet_port(Server),
+    Version = ssl_test_lib:protocol_version(Config),
+    Exe = "openssl",
+    Args = ["s_client", "-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port),
+            ssl_test_lib:version_flag(Version),
+            "-cipher", "aNULL", "-msg"],
+
+    OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args),
+    true = port_command(OpenSslPort, Data),
+
+    ssl_test_lib:check_result(Server, ok),
+
+    %% Clean close down!   Server needs to be closed first !!
+    ssl_test_lib:close(Server),
+    ssl_test_lib:close_port(OpenSslPort),
+    process_flag(trap_exit, false).
 
+ %%--------------------------------------------------------------------
 erlang_server_openssl_client_reuse_session() ->
     [{doc, "Test erlang server with openssl client that reconnects with the"
-     "same session id, to test reusing of sessions."}].
+      "same session id, to test reusing of sessions."}].
 erlang_server_openssl_client_reuse_session(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
     ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
@@ -547,18 +673,18 @@ erlang_server_openssl_client_reuse_session(Config) when is_list(Config) ->
     Data = "From openssl to erlang",
 
     Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
-					{from, self()}, 
-			   {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
-			   {reconnect_times, 5},		
-			   {options, ServerOpts}]),
+                                        {from, self()},
+                                        {mfa, {?MODULE, erlang_ssl_receive, [Data]}},
+                                        {reconnect_times, 5},
+                                        {options, ServerOpts}]),
     Port = ssl_test_lib:inet_port(Server),
     Version = ssl_test_lib:protocol_version(Config),
-    
+
     Exe = "openssl",
     Args = ["s_client", "-connect", hostname_format(Hostname)
             ++ ":" ++ integer_to_list(Port),
-	    ssl_test_lib:version_flag(Version),
-	    "-reconnect"],
+            ssl_test_lib:version_flag(Version),
+            "-reconnect"],
     
     OpenSslPort =  ssl_test_lib:portable_open_port(Exe, Args),
 
@@ -569,7 +695,7 @@ erlang_server_openssl_client_reuse_session(Config) when is_list(Config) ->
     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close(Server),
     ssl_test_lib:close_port(OpenSslPort),
-    process_flag(trap_exit, false),
+     process_flag(trap_exit, false),
     ok.
 
 %%--------------------------------------------------------------------
@@ -593,46 +719,46 @@ erlang_client_openssl_server_renegotiate(Config) when is_list(Config) ->
 
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port),  
-	    ssl_test_lib:version_flag(Version), 
-	    "-cert", CertFile, "-key", KeyFile, "-msg"], 
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile, "-key", KeyFile, "-msg"],
     
     OpensslPort =  ssl_test_lib:portable_open_port(Exe, Args), 
 
     ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
 
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       delayed_send, [[ErlData, OpenSslData]]}},
-					{options, ClientOpts}]),
+                                        {host, Hostname},
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                               delayed_send, [[ErlData, OpenSslData]]}},
+                                         {options, ClientOpts}]),
 
     true = port_command(OpensslPort, ?OPENSSL_RENEGOTIATE),
     ct:sleep(?SLEEP),
     true = port_command(OpensslPort, OpenSslData),
     
     ssl_test_lib:check_result(Client, ok), 
-   
-    %% Clean close down!   Server needs to be closed first !!
+
+     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close_port(OpensslPort),
     ssl_test_lib:close(Client),
-    process_flag(trap_exit, false),
+     process_flag(trap_exit, false),
     ok.
 
 %%--------------------------------------------------------------------
 
 erlang_client_openssl_server_nowrap_seqnum() ->
     [{doc, "Test that erlang client will renegotiate session when",
-     "max sequence number celing is about to be reached. Although"
-     "in the testcase we use the test option renegotiate_at" 
-     " to lower treashold substantially."}].
+      "max sequence number celing is about to be reached. Although"
+      "in the testcase we use the test option renegotiate_at"
+      " to lower treashold substantially."}].
 erlang_client_openssl_server_nowrap_seqnum(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
     ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
     ClientOpts = ssl_test_lib:ssl_options(client_rsa_opts, Config),
 
     {ClientNode, _, Hostname} = ssl_test_lib:run_where(Config),
-    
+
     ErlData = "From erlang to openssl\n",
     N = 10,
 
@@ -642,21 +768,21 @@ erlang_client_openssl_server_nowrap_seqnum(Config) when is_list(Config) ->
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port),
-	    ssl_test_lib:version_flag(Version),
-	    "-cert", CertFile, "-key", KeyFile, "-msg"], 
-    
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile, "-key", KeyFile, "-msg"],
+
     OpensslPort = ssl_test_lib:portable_open_port(Exe, Args),
 
     ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
 
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					{mfa, {ssl_test_lib, 
-					       trigger_renegotiate, [[ErlData, N+2]]}},
-					{options, [{reuse_sessions, false},
-						   {renegotiate_at, N} | ClientOpts]}]),
-    
+                                        {host, Hostname},
+                                        {from, self()},
+                                        {mfa, {ssl_test_lib,
+                                               trigger_renegotiate, [[ErlData, N+2]]}},
+                                        {options, [{reuse_sessions, false},
+                                                   {renegotiate_at, N} | ClientOpts]}]),
+
     ssl_test_lib:check_result(Client, ok), 
 
     %% Clean close down!   Server needs to be closed first !!
@@ -666,37 +792,37 @@ erlang_client_openssl_server_nowrap_seqnum(Config) when is_list(Config) ->
 %%--------------------------------------------------------------------
 erlang_server_openssl_client_nowrap_seqnum() ->
     [{doc, "Test that erlang client will renegotiate session when",
-     "max sequence number celing is about to be reached. Although"
-     "in the testcase we use the test option renegotiate_at" 
-     " to lower treashold substantially."}].
+      "max sequence number celing is about to be reached. Although"
+      "in the testcase we use the test option renegotiate_at"
+      " to lower treashold substantially."}].
 erlang_server_openssl_client_nowrap_seqnum(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
     ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
 
     {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
-    
+
     Data = "From openssl to erlang",
-    
+
     N = 10,
 
     Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
-					{from, self()}, 
-					{mfa, {ssl_test_lib, 
-					       trigger_renegotiate, [[Data, N+2]]}},
-					{options, [{renegotiate_at, N}, {reuse_sessions, false} | ServerOpts]}]),
+                                        {from, self()},
+                                        {mfa, {ssl_test_lib,
+                                               trigger_renegotiate, [[Data, N+2]]}},
+                                        {options, [{renegotiate_at, N}, {reuse_sessions, false} | ServerOpts]}]),
     Port = ssl_test_lib:inet_port(Server),
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl", 
     Args = ["s_client","-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port),
-	    ssl_test_lib:version_flag(Version),
-	    "-msg"],
-    
+            ssl_test_lib:version_flag(Version),
+            "-msg"],
+
     OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args), 
 
     true = port_command(OpenSslPort, Data),
-    
+
     ssl_test_lib:check_result(Server, ok),
-    
+
     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close(Server),
     ssl_test_lib:close_port(OpenSslPort),
@@ -706,15 +832,15 @@ erlang_server_openssl_client_nowrap_seqnum(Config) when is_list(Config) ->
 
 erlang_client_openssl_server_no_server_ca_cert() ->
     [{doc, "Test erlang client when openssl server sends a cert chain not"
-     "including the ca cert. Explicitly test this even if it is"
-     "implicitly tested eleswhere."}].
+      "including the ca cert. Explicitly test this even if it is"
+      "implicitly tested eleswhere."}].
 erlang_client_openssl_server_no_server_ca_cert(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
     ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
     ClientOpts = ssl_test_lib:ssl_options(client_rsa_opts, Config),
 
     {ClientNode, _, Hostname} = ssl_test_lib:run_where(Config),
-    
+
     Data = "From openssl to erlang",
 
     Port = ssl_test_lib:inet_port(node()),
@@ -723,22 +849,22 @@ erlang_client_openssl_server_no_server_ca_cert(Config) when is_list(Config) ->
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port), 
-	    ssl_test_lib:version_flag(Version),
-	    "-cert", CertFile, "-key", KeyFile, "-msg"], 
-    
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile, "-key", KeyFile, "-msg"],
+
     OpensslPort =  ssl_test_lib:portable_open_port(Exe, Args), 
- 
+
     ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
 
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       erlang_ssl_receive, [Data]}},
-					{options, ClientOpts}]),
+                                        {host, Hostname},
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                               erlang_ssl_receive, [Data]}},
+                                        {options, ClientOpts}]),
 
     true = port_command(OpensslPort, Data),
-    
+
     ssl_test_lib:check_result(Client, ok), 
 
     %% Clean close down!   Server needs to be closed first !!
@@ -755,9 +881,9 @@ erlang_client_openssl_server_client_cert(Config) when is_list(Config) ->
     ClientOpts = ssl_test_lib:ssl_options(client_rsa_verify_opts, Config),
 
     {ClientNode, _, Hostname} = ssl_test_lib:run_where(Config),
-    
+
     Data = "From openssl to erlang",
-    
+
     Port = ssl_test_lib:inet_port(node()),
     CertFile = proplists:get_value(certfile, ServerOpts),
     CaCertFile = proplists:get_value(cacertfile, ServerOpts),
@@ -765,31 +891,30 @@ erlang_client_openssl_server_client_cert(Config) when is_list(Config) ->
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port),
-	    ssl_test_lib:version_flag(Version),
-	    "-cert", CertFile, "-CAfile", CaCertFile, 
-	    "-key", KeyFile, "-Verify", "2"],
-    
+            ssl_test_lib:version_flag(Version),
+            "-cert", CertFile, "-CAfile", CaCertFile,
+            "-key", KeyFile, "-Verify", "2"],
+
     OpensslPort = ssl_test_lib:portable_open_port(Exe, Args),   
 
     ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
 
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       erlang_ssl_receive, [Data]}},
-					{options, ClientOpts}]),
+                                        {host, Hostname},
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                               erlang_ssl_receive, [Data]}},
+                                        {options, ClientOpts}]),
     true = port_command(OpensslPort, Data),
-    
+
     ssl_test_lib:check_result(Client, ok),
-  
+
     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close_port(OpensslPort), 
     ssl_test_lib:close(Client),
     process_flag(trap_exit, false).
 
 %%--------------------------------------------------------------------  
-
 erlang_server_openssl_client_client_cert() ->
     [{doc,"Test erlang server with openssl client when client sends cert"}].
 erlang_server_openssl_client_client_cert(Config) when is_list(Config) ->
@@ -798,39 +923,38 @@ erlang_server_openssl_client_client_cert(Config) when is_list(Config) ->
     ClientOpts = ssl_test_lib:ssl_options(client_rsa_verify_opts, Config),
 
     {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
-    
+
     Data = "From openssl to erlang",
 
     Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       erlang_ssl_receive, [Data]}},
-					{options, 
-					 [{verify , verify_peer} 
-					  | ServerOpts]}]),
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                               erlang_ssl_receive, [Data]}},
+                                        {options,
+                                         [{verify , verify_peer}
+                                          | ServerOpts]}]),
     Port = ssl_test_lib:inet_port(Server),
-    
+
     CaCertFile = proplists:get_value(cacertfile, ClientOpts),
     CertFile = proplists:get_value(certfile, ClientOpts),
     KeyFile = proplists:get_value(keyfile, ClientOpts),
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_client", "-cert", CertFile,
-	   "-CAfile", CaCertFile, 
-	   "-key", KeyFile,"-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port),
-	   ssl_test_lib:version_flag(Version)],
+            "-CAfile", CaCertFile,
+            "-key", KeyFile,"-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port),
+            ssl_test_lib:version_flag(Version)],
     OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args), 
 
     true = port_command(OpenSslPort, Data),    
     ssl_test_lib:check_result(Server, ok),
-    
+
     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close_port(OpenSslPort),
     ssl_test_lib:close(Server),
     process_flag(trap_exit, false).
 
 %%--------------------------------------------------------------------  
-
 erlang_server_erlang_client_client_cert() ->
     [{doc,"Test erlang server with erlang client when client sends cert"}].
 erlang_server_erlang_client_client_cert(Config) when is_list(Config) ->
@@ -839,30 +963,30 @@ erlang_server_erlang_client_client_cert(Config) when is_list(Config) ->
     ClientOpts = proplists:get_value(client_rsa_verify_opts, Config),  
     Version = ssl_test_lib:protocol_version(Config),
     {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
-    
+
     Data = "From erlang to erlang",
 
     Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
-					{from, self()}, 
-					{mfa, {?MODULE, 
-					       erlang_ssl_receive, 
-					       %% Due to 1/n-1 splitting countermeasure Rizzo/Duong-Beast
-					       [Data]}},
-					{options, 
-					 [{verify , verify_peer} 
-					  | ServerOpts]}]),
+                                        {from, self()},
+                                        {mfa, {?MODULE,
+                                               erlang_ssl_receive,
+                                               %% Due to 1/n-1 splitting countermeasure Rizzo/Duong-Beast
+                                               [Data]}},
+                                        {options,
+                                         [{verify , verify_peer}
+                                          | ServerOpts]}]),
     Port = ssl_test_lib:inet_port(Server),
-    
+
     Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					{host, Hostname},
-					{from, self()}, 
-					%% Due to 1/n-1 splitting countermeasure Rizzo/Duong-Beast
-					{mfa, {ssl, send, [Data]}},
-					{options, 
-					 [{versions, [Version]} | ClientOpts]}]),
-    
+                                        {host, Hostname},
+                                        {from, self()},
+                                        %% Due to 1/n-1 splitting countermeasure Rizzo/Duong-Beast
+                                        {mfa, {ssl, send, [Data]}},
+                                        {options,
+                                         [{versions, [Version]} | ClientOpts]}]),
+
     ssl_test_lib:check_result(Server, ok, Client, ok),
-    
+
     ssl_test_lib:close(Server),
     ssl_test_lib:close(Client),
     process_flag(trap_exit, false).
@@ -894,43 +1018,43 @@ erlang_client_bad_openssl_server(Config) when is_list(Config) ->
     ClientOpts = ssl_test_lib:ssl_options(client_rsa_opts, Config),
 
     {ClientNode, _, Hostname} = ssl_test_lib:run_where(Config),
-    
+
     Port = ssl_test_lib:inet_port(node()),
     CertFile = proplists:get_value(certfile, ServerOpts),
     KeyFile = proplists:get_value(keyfile, ServerOpts),
     Version = ssl_test_lib:protocol_version(Config),
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port), ssl_test_lib:version_flag(Version),
- 	"-cert", CertFile, "-key", KeyFile],
+            "-cert", CertFile, "-key", KeyFile],
     OpensslPort = ssl_test_lib:portable_open_port(Exe, Args), 
-    
+
     ssl_test_lib:wait_for_openssl_server(Port, proplists:get_value(protocol, Config)),
-    
+
     Client0 = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
-					 {host, Hostname},
-					 {from, self()}, 
- 					{mfa, {?MODULE, server_sent_garbage, []}},
-					 {options,
-					  [{versions, [Version]} | ClientOpts]}]),
-    
+                                         {host, Hostname},
+                                         {from, self()},
+                                         {mfa, {?MODULE, server_sent_garbage, []}},
+                                         {options,
+                                          [{versions, [Version]} | ClientOpts]}]),
+
     %% Send garbage
     true = port_command(OpensslPort, ?OPENSSL_GARBAGE),
 
     ct:sleep(?SLEEP),
 
     Client0 ! server_sent_garbage,
-    
+
     ssl_test_lib:check_result(Client0, true),
-    
+
     ssl_test_lib:close(Client0),
-    
+
     %% Make sure openssl does not hang and leave zombie process
     Client1 = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
- 					 {host, Hostname},
- 					 {from, self()},
- 					 {mfa, {ssl_test_lib, no_result_msg, []}},
- 					 {options,
-					  [{versions, [Version]} | ClientOpts]}]),
+                                         {host, Hostname},
+                                         {from, self()},
+                                         {mfa, {ssl_test_lib, no_result_msg, []}},
+                                         {options,
+                                          [{versions, [Version]} | ClientOpts]}]),
 
     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close_port(OpensslPort),
@@ -955,38 +1079,38 @@ expired_session(Config) when is_list(Config) ->
 
     Exe = "openssl",
     Args = ["s_server", "-accept", integer_to_list(Port),
-	"-cert", CertFile,"-key", KeyFile], 
-    
+            "-cert", CertFile,"-key", KeyFile],
+
     OpensslPort = ssl_test_lib:portable_open_port(Exe, Args), 
 
     ssl_test_lib:wait_for_openssl_server(Port, tls),
-    
+
     Client0 =
-	ssl_test_lib:start_client([{node, ClientNode}, 
-		      {port, Port}, {host, Hostname},
-			    {mfa, {ssl_test_lib, no_result, []}},
-		      {from, self()},  {options, ClientOpts}]),   
-         
+        ssl_test_lib:start_client([{node, ClientNode},
+                                   {port, Port}, {host, Hostname},
+                                   {mfa, {ssl_test_lib, no_result, []}},
+                                   {from, self()},  {options, ClientOpts}]),
+
     ssl_test_lib:close(Client0),
 
     %% Make sure session is registered
     ct:sleep(?SLEEP),
 
     Client1 =
-	ssl_test_lib:start_client([{node, ClientNode}, 
-				   {port, Port}, {host, Hostname},
-				   {mfa, {ssl_test_lib, no_result, []}},
-				   {from, self()},  {options, ClientOpts}]),  
-    
+        ssl_test_lib:start_client([{node, ClientNode},
+                                   {port, Port}, {host, Hostname},
+                                   {mfa, {ssl_test_lib, no_result, []}},
+                                   {from, self()},  {options, ClientOpts}]),
+
     ssl_test_lib:close(Client1),
     %% Make sure session is unregistered due to expiration
     ct:sleep((?EXPIRE+1) * 1000),
-    
+
     Client2 =
-	ssl_test_lib:start_client([{node, ClientNode}, 
-				   {port, Port}, {host, Hostname},
-				   {mfa, {ssl_test_lib, no_result, []}},
-				   {from, self()},  {options, ClientOpts}]),  
+        ssl_test_lib:start_client([{node, ClientNode},
+                                   {port, Port}, {host, Hostname},
+                                   {mfa, {ssl_test_lib, no_result, []}},
+                                   {from, self()},  {options, ClientOpts}]),
 
     %% Clean close down!   Server needs to be closed first !!
     ssl_test_lib:close_port(OpensslPort),
@@ -1002,52 +1126,21 @@ ssl2_erlang_server_openssl_client(Config) when is_list(Config) ->
     ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
 
     {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
-    
-    Server = ssl_test_lib:start_server_error([{node, ServerNode}, {port, 0}, 
-					      {from, self()}, 
-					      {options, ServerOpts}]),
-    Port = ssl_test_lib:inet_port(Server),
-    
-    Exe = "openssl",
-    Args = ["s_client", "-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port), 
-	"-ssl2", "-msg"],
-    
-    OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args),  
-    
-    ct:log("Ports ~p~n", [[erlang:port_info(P) || P <- erlang:ports()]]), 
-    consume_port_exit(OpenSslPort),
-    ssl_test_lib:check_result(Server, {error, {tls_alert, "handshake failure"}}),
-    process_flag(trap_exit, false).
-%%--------------------------------------------------------------------
-ssl2_erlang_server_openssl_client_comp() ->
-    [{doc,"Test that ssl v2 clients are rejected"}].
-
-ssl2_erlang_server_openssl_client_comp(Config) when is_list(Config) ->
-    process_flag(trap_exit, true),
-    ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
-    V2Compat = proplists:get_value(v2_hello_compatible, Config), 
-
-    ServerOpts = ssl_test_lib:ssl_options(server_rsa_opts, Config),
-
-    {_, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
-    
-    Data = "From openssl to erlang",
 
     Server = ssl_test_lib:start_server_error([{node, ServerNode}, {port, 0}, 
-					{from, self()}, 
-			   {options, [{v2_hello_compatible, V2Compat} | ServerOpts]}]),
+                                              {from, self()},
+                                              {options, ServerOpts}]),
     Port = ssl_test_lib:inet_port(Server),
-    
+
     Exe = "openssl",
     Args = ["s_client", "-connect", hostname_format(Hostname) ++ ":" ++ integer_to_list(Port), 
-	"-ssl2", "-msg"],
-    
+            "-ssl2", "-msg"],
+
     OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args),  
-    true = port_command(OpenSslPort, Data),
-    
+
     ct:log("Ports ~p~n", [[erlang:port_info(P) || P <- erlang:ports()]]), 
     consume_port_exit(OpenSslPort),
-    ssl_test_lib:check_result(Server, {error, {tls_alert, "protocol version"}}),
+    ssl_test_lib:check_result(Server, {error, {tls_alert, "bad record mac"}}),
     process_flag(trap_exit, false).
 
 %%--------------------------------------------------------------------
@@ -1875,3 +1968,11 @@ hostname_format(Hostname) ->
         false ->
             "localhost"   
     end.
+
+no_v2_flag() ->
+    case ssl_test_lib:supports_ssl_tls_version(sslv2) of
+        true ->
+            " -no_ssl2 ";
+        false ->
+            ""
+    end.
diff --git a/lib/ssl/test/x509_test.erl b/lib/ssl/test/x509_test.erl
index 031fad1216..fea01efdaf 100644
--- a/lib/ssl/test/x509_test.erl
+++ b/lib/ssl/test/x509_test.erl
@@ -64,15 +64,12 @@ do_gen_pem_config_files(Config, CertFile, KeyFile, CAFile) ->
 cert_entry(Cert) ->
     {'Certificate', Cert, not_encrypted}.
 
-key_entry(Key = #'RSAPrivateKey'{}) ->
-    Der = public_key:der_encode('RSAPrivateKey', Key),
-    {'RSAPrivateKey', Der, not_encrypted};
-key_entry(Key = #'DSAPrivateKey'{}) ->
-    Der =  public_key:der_encode('DSAPrivateKey', Key),
-    {'DSAPrivateKey', Der, not_encrypted};
-key_entry(Key = #'ECPrivateKey'{}) ->
-    Der =  public_key:der_encode('ECPrivateKey', Key),
-    {'ECPrivateKey', Der, not_encrypted}.
+key_entry({'RSAPrivateKey', DERKey}) ->
+    {'RSAPrivateKey', DERKey, not_encrypted};
+key_entry({'DSAPrivateKey', DERKey}) ->
+    {'DSAPrivateKey', DERKey, not_encrypted};
+key_entry({'ECPrivateKey', DERKey}) ->
+    {'ECPrivateKey', DERKey, not_encrypted}.
 
 ca_entries(CAs) ->
     [{'Certificate', CACert, not_encrypted} || CACert <- CAs].
diff --git a/lib/ssl/vsn.mk b/lib/ssl/vsn.mk
index bb77326751..0ff22c5eab 100644
--- a/lib/ssl/vsn.mk
+++ b/lib/ssl/vsn.mk
@@ -1 +1 @@
-SSL_VSN = 8.2.1
+SSL_VSN = 8.2.5
diff --git a/lib/stdlib/doc/src/Makefile b/lib/stdlib/doc/src/Makefile
index 93eac8220d..af27efa6c1 100644
--- a/lib/stdlib/doc/src/Makefile
+++ b/lib/stdlib/doc/src/Makefile
@@ -98,13 +98,15 @@ XML_REF3_FILES = \
 	sys.xml \
 	timer.xml \
 	unicode.xml \
+	uri_string.xml \
 	win32reg.xml \
 	zip.xml
 
 XML_REF6_FILES = stdlib_app.xml
 
 XML_PART_FILES = part.xml
-XML_CHAPTER_FILES = io_protocol.xml unicode_usage.xml notes.xml notes_history.xml assert_hrl.xml
+XML_CHAPTER_FILES = introduction.xml io_protocol.xml unicode_usage.xml \
+	notes.xml assert_hrl.xml
 
 BOOK_FILES = book.xml
 
diff --git a/lib/stdlib/doc/src/assert_hrl.xml b/lib/stdlib/doc/src/assert_hrl.xml
index ea23cca2ee..33f29f38da 100644
--- a/lib/stdlib/doc/src/assert_hrl.xml
+++ b/lib/stdlib/doc/src/assert_hrl.xml
@@ -93,7 +93,7 @@ erlc -DNOASSERT=true *.erl</code>
     <taglist>
       <tag><c>assert(BoolExpr)</c></tag>
       <item></item>
-      <tag><c>URKAassert(BoolExpr, Comment)</c></tag>
+      <tag><c>assert(BoolExpr, Comment)</c></tag>
       <item>
         <p>Tests that <c>BoolExpr</c> completes normally returning
           <c>true</c>.</p>
diff --git a/lib/stdlib/doc/src/digraph.xml b/lib/stdlib/doc/src/digraph.xml
index 5332d7aba5..db96beed6c 100644
--- a/lib/stdlib/doc/src/digraph.xml
+++ b/lib/stdlib/doc/src/digraph.xml
@@ -170,6 +170,10 @@
         <p>If the edge would create a cycle in
           an <seealso marker="#acyclic_digraph">acyclic digraph</seealso>,
           <c>{error,&nbsp;{bad_edge,&nbsp;<anno>Path</anno>}}</c> is returned.
+          If <c><anno>G</anno></c> already has an edge with value
+          <c><anno>E</anno></c> connecting a different pair of vertices,
+          <c>{error,&nbsp;{bad_edge,&nbsp;[<anno>V1</anno>,&nbsp;<anno>V2</anno>]}}</c>
+          is returned.
           If either of <c><anno>V1</anno></c> or <c><anno>V2</anno></c> is not
           a vertex of digraph <c><anno>G</anno></c>,
           <c>{error,&nbsp;{bad_vertex,&nbsp;</c><anno>V</anno><c>}}</c> is
diff --git a/lib/stdlib/doc/src/erl_tar.xml b/lib/stdlib/doc/src/erl_tar.xml
index 337028568a..14c543ee2b 100644
--- a/lib/stdlib/doc/src/erl_tar.xml
+++ b/lib/stdlib/doc/src/erl_tar.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>2003</year><year>2017</year>
+      <year>2003</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -136,6 +136,9 @@
         <v>Filename = filename()|{NameInArchive,FilenameOrBin}</v>
         <v>Options = [Option]</v>
         <v>Option = dereference|verbose|{chunks,ChunkSize}</v>
+           <v>|{atime,non_neg_integer()}|{mtime,non_neg_integer()}</v>
+           <v>|{ctime,non_neg_integer()}|{uid,non_neg_integer()}</v>
+           <v>|{gid,non_neg_integer()}</v>
         <v>ChunkSize = positive_integer()</v>
         <v>RetValue = ok|{error,{Filename,Reason}}</v>
         <v>Reason = term()</v>
@@ -167,6 +170,42 @@
               <seealso marker="ssh:ssh_sftp#open_tar/3">
               <c>ssh_sftp:open_tar/3</c></seealso>.</p>
           </item>
+          <tag><c>{atime,non_neg_integer()}</c></tag>
+          <item>
+            <p>Sets the last time, as
+	            <seealso marker="erts:time_correction#POSIX_Time">
+              POSIX time</seealso>, when the file was read. See also
+              <seealso marker="kernel:file#read_file_info/1">
+              <c>file:read_file_info/1</c></seealso>.</p>
+          </item>
+          <tag><c>{mtime,non_neg_integer()}</c></tag>
+          <item>
+            <p>Sets the last time, as
+	            <seealso marker="erts:time_correction#POSIX_Time">
+              POSIX time</seealso>, when the file was written. See also
+              <seealso marker="kernel:file#read_file_info/1">
+              <c>file:read_file_info/1</c></seealso>.</p>
+          </item>
+          <tag><c>{ctime,non_neg_integer()}</c></tag>
+          <item>
+            <p>Sets the time, as
+	            <seealso marker="erts:time_correction#POSIX_Time">
+              POSIX time</seealso>, when the file was created. See also
+              <seealso marker="kernel:file#read_file_info/1">
+              <c>file:read_file_info/1</c></seealso>.</p>
+          </item>
+          <tag><c>{uid,non_neg_integer()}</c></tag>
+          <item>
+            <p>Sets the file owner.
+              <seealso marker="kernel:file#read_file_info/1">
+              <c>file:read_file_info/1</c></seealso>.</p>
+          </item>
+          <tag><c>{gid,non_neg_integer()}</c></tag>
+          <item>
+            <p>Sets the group that the file owner belongs to.
+              <seealso marker="kernel:file#read_file_info/1">
+              <c>file:read_file_info/1</c></seealso>.</p>
+          </item>
         </taglist>
       </desc>
     </func>
@@ -378,7 +417,7 @@
         <v>Reason = term()</v>
       </type>
       <desc>
-        <p>Cconverts an error reason term to a human-readable error message
+        <p>Converts an error reason term to a human-readable error message
           string.</p>
       </desc>
     </func>
diff --git a/lib/stdlib/doc/src/ets.xml b/lib/stdlib/doc/src/ets.xml
index 576959b1c8..305376a425 100644
--- a/lib/stdlib/doc/src/ets.xml
+++ b/lib/stdlib/doc/src/ets.xml
@@ -487,6 +487,11 @@ Error: fun containing local Erlang function calls
             <p>The pid of the heir of the table, or <c>none</c> if no heir
               is set.</p>
           </item>
+          <tag><c>{id,</c><seealso marker="#type-tid">
+              <c>tid()</c></seealso><c>}</c></tag>
+          <item>
+            <p>The table identifier.</p>
+          </item>
           <tag><c>{keypos, integer() >= 1}</c></tag>
           <item>
             <p>The key position.</p>
@@ -963,11 +968,11 @@ ets:is_compiled_ms(Broken).</code>
     <func>
       <name name="match_spec_run" arity="2"/>
       <fsummary>Perform matching, using a compiled match specification on a
-        list of tuples.</fsummary>
+        list of terms.</fsummary>
       <desc>
         <p>Executes the matching specified in a compiled
           <seealso marker="#match_spec">match specification</seealso> on a list
-          of tuples. Term <c><anno>CompiledMatchSpec</anno></c> is to be
+          of terms. Term <c><anno>CompiledMatchSpec</anno></c> is to be
           the result of a call to <seealso marker="#match_spec_compile/1">
           <c>match_spec_compile/1</c></seealso> and is hence the internal
           representation of the match specification one wants to use.</p>
@@ -985,7 +990,7 @@ Table = ets:new...
 MatchSpec = ...
 % The following call...
 ets:match_spec_run(ets:tab2list(Table),
-ets:match_spec_compile(MatchSpec)),
+                   ets:match_spec_compile(MatchSpec)),
 % ...gives the same result as the more common (and more efficient)
 ets:select(Table, MatchSpec),</code>
         <note>
@@ -1074,10 +1079,13 @@ ets:select(Table, MatchSpec),</code>
           </item>
           <tag><c>named_table</c></tag>
           <item>
-            <p>If this option is present, name <c><anno>Name</anno></c> is
-              associated with the table identifier. The name can then
-              be used instead of the table identifier in subsequent
-              operations.</p>
+            <p>If this option is present, the table is registered under its
+              <c><anno>Name</anno></c> which can then be used instead of the
+              table identifier in subsequent operations.</p>
+            <p>The function will also return the <c><anno>Name</anno></c>
+              instead of the table identifier. To get the table identifier of a
+              named table, use
+              <seealso marker="#whereis/1"><c>whereis/1</c></seealso>.</p>
           </item>
           <tag><c>{keypos,<anno>Pos</anno>}</c></tag>
           <item>
@@ -1961,7 +1969,7 @@ true</pre>
           The return value is a list of the new counter values from each 
           update operation in the same order as in the operation list. If an 
           empty list is specified, nothing is updated and an empty list is 
-          returned. If the function fails, no updates is done.</p>
+          returned. If the function fails, no updates are done.</p>
         <p>The specified <c><anno>Key</anno></c> is used to identify the object
           by either <em>matching</em> the key of an object in a <c>set</c>
           table, or <em>compare equal</em> to the key of an object in an
@@ -2037,6 +2045,21 @@ true</pre>
         </list>
       </desc>
     </func>
+
+    <func>
+      <name name="whereis" arity="1"/>
+      <fsummary>Retrieves the tid() of a named table.</fsummary>
+      <desc>
+        <p>This function returns the
+          <seealso marker="#type-tid"><c>tid()</c></seealso> of the named table
+          identified by <c><anno>TableName</anno></c>, or <c>undefined</c> if
+          no such table exists. The <c>tid()</c> can be used in place of the
+          table name in all operations, which is slightly faster since the name
+          does not have to be resolved on each call.</p>
+        <p>If the table is deleted, the <c>tid()</c> will be invalid even if
+          another named table is created with the same name.</p>
+      </desc>
+    </func>
   </funcs>
 </erlref>
 
diff --git a/lib/stdlib/doc/src/filelib.xml b/lib/stdlib/doc/src/filelib.xml
index 5e631aac21..3b5be75bc0 100644
--- a/lib/stdlib/doc/src/filelib.xml
+++ b/lib/stdlib/doc/src/filelib.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>2003</year><year>2017</year>
+      <year>2003</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -296,7 +296,7 @@ filelib:wildcard("lib/**/*.{erl,hrl}")</code>
         for a file with the extension <c>.beam</c>, the default rule is to
         look for a file with a corresponding extension <c>.erl</c> by
         replacing the suffix <c>"ebin"</c> of the object directory path with
-        <c>"src"</c>.
+        <c>"src"</c> or <c>"src/*"</c>.
         The file search is done through <seealso
         marker="#find_file/3"><c>find_file/3</c></seealso>. The directory of
         the object file is always tried before any other directory specified
diff --git a/lib/stdlib/doc/src/filename.xml b/lib/stdlib/doc/src/filename.xml
index d2608ad542..ce19f70df0 100644
--- a/lib/stdlib/doc/src/filename.xml
+++ b/lib/stdlib/doc/src/filename.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>1997</year><year>2017</year>
+      <year>1997</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -399,15 +399,18 @@ true
           tuples <c>{<anno>BinSuffix</anno>, <anno>SourceSuffix</anno>}</c> and
           is interpreted as follows: if the end of the directory name where the
           object is located matches <c><anno>BinSuffix</anno></c>, then the
-          source code directory has the same name, but with
-          <c><anno>BinSuffix</anno></c> replaced by
-          <c><anno>SourceSuffix</anno></c>. <c><anno>Rules</anno></c> defaults
+	  name created by replacing <c><anno>BinSuffix</anno></c> with
+          <c><anno>SourceSuffix</anno></c> is expanded by calling
+	  <seealso marker="filelib#wildcard/1">
+	  <c>filelib:wildcard/1</c></seealso>.
+	  If a regular file is found among the matches, the function
+	  returns that location together with <c><anno>Options</anno></c>.
+          Otherwise the next rule is tried, and so on.</p>
+        <p><c><anno>Rules</anno></c> defaults
           to:</p>
         <code type="none">
-[{"", ""}, {"ebin", "src"}, {"ebin", "esrc"}]</code>
-        <p>If the source file is found in the resulting directory, the function
-          returns that location together with <c><anno>Options</anno></c>.
-          Otherwise the next rule is tried, and so on.</p>
+[{"", ""}, {"ebin", "src"}, {"ebin", "esrc"},
+ {"ebin", "src/*"}, {"ebin", "esrc/*"}]</code>
         <p>The function returns <c>{<anno>SourceFile</anno>,
           <anno>Options</anno>}</c> if it succeeds.
           <c><anno>SourceFile</anno></c> is the absolute path to the source
diff --git a/lib/stdlib/doc/src/gb_sets.xml b/lib/stdlib/doc/src/gb_sets.xml
index 7bfe477a11..2a3785dc27 100644
--- a/lib/stdlib/doc/src/gb_sets.xml
+++ b/lib/stdlib/doc/src/gb_sets.xml
@@ -83,6 +83,8 @@
       </item>
       <item><seealso marker="#is_element/2"><c>is_element/2</c></seealso>
       </item>
+      <item><seealso marker="#is_empty/1"><c>is_empty/1</c></seealso>
+      </item>
       <item><seealso marker="#is_set/1"><c>is_set/1</c></seealso>
       </item>
       <item><seealso marker="#is_subset/2"><c>is_subset/2</c></seealso>
diff --git a/lib/stdlib/doc/src/gen_statem.xml b/lib/stdlib/doc/src/gen_statem.xml
index 4a824f073e..be0d64feba 100644
--- a/lib/stdlib/doc/src/gen_statem.xml
+++ b/lib/stdlib/doc/src/gen_statem.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>2016</year><year>2017</year>
+      <year>2016</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -543,7 +543,23 @@ handle_event(_, _, State, Data) ->
       <name name="event_type"/>
       <desc>
 	<p>
-	  External events are of three types:
+	  There are 3 categories of events:
+	  <seealso marker="#type-external_event_type">external</seealso>,
+	  <seealso marker="#type-timeout_event_type">timeout</seealso>,
+	  and <c>internal</c>.
+	</p>
+	<p>
+	  <c>internal</c> events can only be generated by the
+	  state machine itself through the state transition action
+	  <seealso marker="#type-action"><c>next_event</c></seealso>.
+	</p>
+      </desc>
+    </datatype>
+    <datatype>
+      <name name="external_event_type"/>
+      <desc>
+	<p>
+	  External events are of 3 types:
 	  <c>{call,<anno>From</anno>}</c>, <c>cast</c>, or <c>info</c>.
 	  <seealso marker="#call/2">Calls</seealso>
 	  (synchronous) and
@@ -551,12 +567,17 @@ handle_event(_, _, State, Data) ->
 	  originate from the corresponding API functions.
 	  For calls, the event contains whom to reply to.
 	  Type <c>info</c> originates from regular process messages sent
-	  to the <c>gen_statem</c>. The state machine
-	  implementation can, in addition to the above,
-	  generate
-	  <seealso marker="#type-event_type"><c>events of types</c></seealso>
-	  <c>timeout</c>, <c>{timeout,<anno>Name</anno>}</c>,
-	  <c>state_timeout</c>, and <c>internal</c> to itself.
+	  to the <c>gen_statem</c>.
+	</p>
+      </desc>
+    </datatype>
+    <datatype>
+      <name name="timeout_event_type"/>
+      <desc>
+	<p>
+	  There are 3 types of timeout events that the state machine
+	  can generate for itself with the corresponding
+	  <seealso marker="#type-timeout_action">timeout_action()</seealso>s.
 	</p>
       </desc>
     </datatype>
@@ -1026,6 +1047,25 @@ handle_event(_, _, State, Data) ->
 	      for this state transition.
 	    </p>
 	  </item>
+	</taglist>
+      </desc>
+    </datatype>
+    <datatype>
+      <name name="timeout_action"/>
+      <desc>
+	<p>
+	  These state transition actions can be invoked by
+	  returning them from the
+	  <seealso marker="#state callback">state callback</seealso>, from
+	  <seealso marker="#Module:init/1"><c>Module:init/1</c></seealso>
+	  or by giving them to
+	  <seealso marker="#enter_loop/5"><c>enter_loop/5,6</c></seealso>.
+	</p>
+	<p>
+	  These timeout actions sets timeout
+	  <seealso marker="#type-transition_option">transition options</seealso>.
+	</p>
+	<taglist>
 	  <tag><c>Timeout</c></tag>
 	  <item>
 	    <p>
diff --git a/lib/stdlib/doc/src/io.xml b/lib/stdlib/doc/src/io.xml
index 64fcf4379f..f1037ec76b 100644
--- a/lib/stdlib/doc/src/io.xml
+++ b/lib/stdlib/doc/src/io.xml
@@ -137,11 +137,11 @@
 Hello world!
 ok</pre>
         <p>The general format of a control sequence is <c>~F.P.PadModC</c>.</p>
-        <p>Character <c>C</c> determines the type of control sequence
-          to be used, <c>F</c> and <c>P</c> are optional numeric
-          arguments. If <c>F</c>, <c>P</c>, or <c>Pad</c> is <c>*</c>,
-          the next argument in <c>Data</c> is used as the numeric value
-          of <c>F</c> or <c>P</c>.</p>
+        <p>The character <c>C</c> determines the type of control sequence
+          to be used. It is the only required field. All of <c>F</c>,
+          <c>P</c>, <c>Pad</c>, and <c>Mod</c> are optional. For example,
+          to use a <c>#</c> for <c>Pad</c> but use the default values for
+          <c>F</c> and <c>P</c>, you can write <c>~..#C</c>.</p>
         <list type="bulleted">
         <item>
           <p><c>F</c> is the <c>field width</c> of the printed argument. A
@@ -167,13 +167,26 @@ ok</pre>
             The default padding character is <c>' '</c> (space).</p>
         </item>
         <item>
-          <p><c>Mod</c> is the control sequence modifier. It is either a
-            single character (<c>t</c>, for Unicode
-            translation, and <c>l</c>, for stopping <c>p</c> and
-            <c>P</c> from detecting printable characters)
-            that changes the interpretation of <c>Data</c>.</p>
+          <p><c>Mod</c> is the control sequence modifier. This is
+            one or more characters that change the interpretation of
+            <c>Data</c>. The current modifiers are <c>t</c>, for Unicode
+            translation, and <c>l</c>, for stopping <c>p</c> and <c>P</c>
+            from detecting printable characters.</p>
         </item>
       </list>
+        <p>If <c>F</c>, <c>P</c>, or <c>Pad</c> is a <c>*</c> character,
+        the next argument in <c>Data</c> is used as the value.
+        For example:</p>
+        <pre>
+1> <input>io:fwrite("~*.*.0f~n",[9, 5, 3.14159265]).</input>
+003.14159
+ok</pre>
+        <p>To use a literal <c>*</c> character as <c>Pad</c>, it must be
+          passed as an argument:</p>
+        <pre>
+2> <input>io:fwrite("~*.*.*f~n",[9, 5, $*, 3.14159265]).</input>
+**3.14159
+ok</pre>
         <p><em>Available control sequences:</em></p>
         <taglist>
           <tag><c>~</c></tag>
@@ -257,8 +270,9 @@ ok</pre>
 \x{400}
 ok
 5> <input>io:fwrite("~s~n",[[1024]]).</input>
-** exception exit: {badarg,[{io,format,[&lt;0.26.0&gt;,"~s~n",[[1024]]]},
-   ...</pre>
+** exception error: bad argument
+     in function  io:format/3
+        called as io:format(&lt;0.53.0>,"~s~n",[[1024]])</pre>
           </item>
           <tag><c>w</c></tag>
           <item>
@@ -276,10 +290,9 @@ ok
               <c>~w</c>, but breaks terms whose printed representation
               is longer than one line into many lines and indents each
               line sensibly. Left-justification is not supported.
-              It also tries to detect lists of
-              printable characters and to output these as strings. The
-              Unicode translation modifier is used for determining
-              what characters are printable, for example:</p>
+              It also tries to detect flat lists of
+              printable characters and output these as strings.
+              For example:</p>
             <pre>
 1> <input>T = [{attributes,[[{id,age,1.50000},{mode,explicit},</input>
 <input>{typename,"INTEGER"}], [{id,cho},{mode,explicit},{typename,'Cho'}]]},</input>
@@ -301,7 +314,7 @@ ok
  {mode,implicit}]
 ok</pre>
             <p>The field width specifies the maximum line length.
-              Defaults to 80. The precision specifies the initial
+              It defaults to 80. The precision specifies the initial
               indentation of the term. It defaults to the number of
               characters printed on this line in the <em>same</em> call to
               <seealso marker="#write/1"><c>write/1</c></seealso> or
@@ -331,18 +344,53 @@ ok
 [{a,[97]},
  {b,[98]}]
 ok</pre>
-            <p>Binaries that look like UTF-8 encoded strings are
-              output with the string syntax if the Unicode translation
-              modifier is specified:</p>
+            <p>The Unicode translation modifier <c>t</c> specifies how to treat
+              characters outside the Latin-1 range of codepoints, in
+              atoms, strings, and binaries. For example, printing an atom
+              containing a character &gt; 255:</p>
+            <pre>
+8> <input>io:fwrite("~p~n",[list_to_atom([1024])]).</input>
+'\x{400}'
+ok
+9> <input>io:fwrite("~tp~n",[list_to_atom([1024])]).</input>
+'Ѐ'
+ok</pre>
+            <p>By default, Erlang only detects lists of characters
+              in the Latin-1 range as strings, but the <c>+pc unicode</c>
+              flag can be used to change this (see <seealso
+              marker="#printable_range/0">
+              <c>printable_range/0</c></seealso> for details). For example:</p>
+            <pre>
+10> <input>io:fwrite("~p~n",[[214]]).</input>
+"Ö"
+ok
+11> <input>io:fwrite("~p~n",[[1024]]).</input>
+[1024]
+ok
+12> <input>io:fwrite("~tp~n",[[1024]]).</input>
+[1024]
+ok
+</pre>
+            <p>but if Erlang was started with <c>+pc unicode</c>:</p>
             <pre>
-9> <input>io:fwrite("~p~n",[[1024]]).</input>
+13> <input>io:fwrite("~p~n",[[1024]]).</input>
 [1024]
-10> <input>io:fwrite("~tp~n",[[1024]]).</input>
-"\x{400}"
-11> <input>io:fwrite("~tp~n", [&lt;&lt;128,128&gt;&gt;]).</input>
+ok
+14> <input>io:fwrite("~tp~n",[[1024]]).</input>
+"Ѐ"
+ok</pre>
+            <p>Similarly, binaries that look like UTF-8 encoded strings
+              are output with the binary string syntax if the <c>t</c>
+              modifier is specified:</p>
+            <pre>
+15> <input>io:fwrite("~p~n", [&lt;&lt;208,128&gt;&gt;]).</input>
+&lt;&lt;208,128&gt;&gt;
+ok
+16> <input>io:fwrite("~tp~n", [&lt;&lt;208,128&gt;&gt;]).</input>
+&lt;&lt;"Ѐ"/utf8&gt;&gt;
+ok
+17> <input>io:fwrite("~tp~n", [&lt;&lt;128,128&gt;&gt;]).</input>
 &lt;&lt;128,128&gt;&gt;
-12> <input>io:fwrite("~tp~n", [&lt;&lt;208,128&gt;&gt;]).</input>
-&lt;&lt;"\x{400}"/utf8&gt;&gt;
 ok</pre>
           </item>
           <tag><c>W</c></tag>
@@ -454,12 +502,9 @@ ok</pre>
 abc def 'abc def'  {foo,1} A
 ok
 2> <input>io:fwrite("~s", [65]).</input>
-** exception exit: {badarg,[{io,format,[&lt;0.22.0>,"~s","A"]},
-                            {erl_eval,do_apply,5},
-                            {shell,exprs,6},
-                            {shell,eval_exprs,6},
-                            {shell,eval_loop,3}]}
-     in function  io:o_request/2</pre>
+** exception error: bad argument
+     in function  io:format/3
+        called as io:format(&lt;0.53.0>,"~s","A")</pre>
         <p>In this example, an attempt was made to output the single
           character 65 with the aid of the string formatting directive
           <c>"~s"</c>.</p>
diff --git a/lib/stdlib/doc/src/lists.xml b/lib/stdlib/doc/src/lists.xml
index 7efafedc82..c3d5d7e07a 100644
--- a/lib/stdlib/doc/src/lists.xml
+++ b/lib/stdlib/doc/src/lists.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>1996</year><year>2017</year>
+      <year>1996</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -771,6 +771,18 @@ length(lists:seq(From, To, Incr)) =:= (To - From + Incr) div Incr</code>
     </func>
 
     <func>
+      <name name="search" arity="2"/>
+      <fsummary>Find the first element that satisfies a predicate.</fsummary>
+      <desc>
+        <p>If there is a <c><anno>Value</anno></c> in <c><anno>List</anno></c>
+          such that <c><anno>Pred</anno>(<anno>Value</anno>)</c> returns
+          <c>true</c>, returns <c>{value, <anno>Value</anno>}</c>
+          for the first such <c><anno>Value</anno></c>,
+          otherwise returns <c>false</c>.</p>
+      </desc>
+    </func>
+
+    <func>
       <name name="splitwith" arity="2"/>
       <fsummary>Split a list into two lists based on a predicate.</fsummary>
       <desc>
diff --git a/lib/stdlib/doc/src/maps.xml b/lib/stdlib/doc/src/maps.xml
index 8c7270816b..987d92989d 100644
--- a/lib/stdlib/doc/src/maps.xml
+++ b/lib/stdlib/doc/src/maps.xml
@@ -33,16 +33,31 @@
     <p>This module contains functions for maps processing.</p>
   </description>
 
+  <datatypes>
+    <datatype>
+      <name name="iterator"/>
+      <desc>
+        <p>An iterator representing the key value associations in a map.</p>
+        <p>Created using <seealso marker="#iterator-1"><c>maps:iterator/1</c></seealso>.</p>
+        <p>Consumed by <seealso marker="#next-1"><c>maps:next/1</c></seealso>,
+          <seealso marker="#filter-2"><c>maps:filter/2</c></seealso>,
+          <seealso marker="#fold-3"><c>maps:fold/3</c></seealso> and
+          <seealso marker="#map-2"><c>maps:map/2</c></seealso>.</p>
+      </desc>
+    </datatype>
+  </datatypes>
+
   <funcs>
     <func>
       <name name="filter" arity="2"/>
       <fsummary>Select pairs that satisfy a predicate.</fsummary>
       <desc>
-        <p>Returns a map <c><anno>Map2</anno></c> for which predicate
-          <c><anno>Pred</anno></c> holds true in <c><anno>Map1</anno></c>.</p>
+        <p>Returns a map <c><anno>Map</anno></c> for which predicate
+          <c><anno>Pred</anno></c> holds true in <c><anno>MapOrIter</anno></c>.</p>
         <p>The call fails with a <c>{badmap,Map}</c> exception if
-          <c><anno>Map1</anno></c> is not a map, or with <c>badarg</c> if
-          <c><anno>Pred</anno></c> is not a function of arity 2.</p>
+          <c><anno>MapOrIter</anno></c> is not a map or valid iterator,
+          or with <c>badarg</c> if <c><anno>Pred</anno></c> is not a
+          function of arity 2.</p>
         <p><em>Example:</em></p>
         <code type="none">
 > M = #{a => 2, b => 3, c=> 4, "a" => 1, "b" => 2, "c" => 4},
@@ -76,12 +91,16 @@
       <fsummary></fsummary>
       <desc>
         <p>Calls <c>F(K, V, AccIn)</c> for every <c><anno>K</anno></c> to value
-          <c><anno>V</anno></c> association in <c><anno>Map</anno></c> in
+          <c><anno>V</anno></c> association in <c><anno>MapOrIter</anno></c> in
           any order. Function <c>fun F/3</c> must return a new
           accumulator, which is passed to the next successive call.
           This function returns the final value of the accumulator. The initial
           accumulator value <c><anno>Init</anno></c> is returned if the map is
           empty.</p>
+        <p>The call fails with a <c>{badmap,Map}</c> exception if
+          <c><anno>MapOrIter</anno></c> is not a map or valid iterator,
+          or with <c>badarg</c> if <c><anno>Fun</anno></c> is not a
+          function of arity 3.</p>
         <p><em>Example:</em></p>
         <code type="none">
 > Fun = fun(K,V,AccIn) when is_list(K) -> AccIn + V end,
@@ -169,6 +188,32 @@ false</code>
     </func>
 
     <func>
+      <name name="iterator" arity="1"/>
+      <fsummary>Create a map iterator.</fsummary>
+      <desc>
+        <p>Returns a map iterator <c><anno>Iterator</anno></c> that can
+          be used by <seealso marker="#next-1"><c>maps:next/1</c></seealso>
+          to traverse the key-value associations in a map. When iterating
+          over a map, the memory usage is guaranteed to be bounded no matter
+          the size of the map.</p>
+        <p>The call fails with a <c>{badmap,Map}</c> exception if
+          <c><anno>Map</anno></c> is not a map.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> M = #{ a => 1, b => 2 }.
+#{a => 1,b => 2}
+> I = maps:iterator(M).
+[{a,1},{b,2}]
+> {K1, V1, I2} = maps:next(I).
+{a,1,[{b,2}]}
+> {K2, V2, I3} = maps:next(I2).
+{b,2,[]}
+> maps:next(I3).
+none</code>
+      </desc>
+    </func>
+
+    <func>
       <name name="keys" arity="1"/>
       <fsummary></fsummary>
       <desc>
@@ -188,12 +233,16 @@ false</code>
       <name name="map" arity="2"/>
       <fsummary></fsummary>
       <desc>
-        <p>Produces a new map <c><anno>Map2</anno></c> by calling function
+        <p>Produces a new map <c><anno>Map</anno></c> by calling function
           <c>fun F(K, V1)</c> for every <c><anno>K</anno></c> to value
-          <c><anno>V1</anno></c> association in <c><anno>Map1</anno></c> in
+          <c><anno>V1</anno></c> association in <c><anno>MapOrIter</anno></c> in
           any order. Function <c>fun F/2</c> must return value
           <c><anno>V2</anno></c> to be associated with key <c><anno>K</anno></c>
-          for the new map <c><anno>Map2</anno></c>.</p>
+          for the new map <c><anno>Map</anno></c>.</p>
+        <p>The call fails with a <c>{badmap,Map}</c> exception if
+          <c><anno>MapOrIter</anno></c> is not a map or valid iterator,
+          or with <c>badarg</c> if <c><anno>Fun</anno></c> is not a
+          function of arity 2.</p>
         <p><em>Example:</em></p>
         <code type="none">
 > Fun = fun(K,V1) when is_list(K) -> V1*2 end,
@@ -234,6 +283,35 @@ false</code>
     </func>
 
     <func>
+      <name name="next" arity="1"/>
+      <fsummary>Get the next key and value from an iterator.</fsummary>
+      <desc>
+        <p>Returns the next key-value association in
+          <c><anno>Iterator</anno></c> and a new iterator for the
+          remaining associations in the iterator.
+        </p>
+        <p>
+          If there are no more associations in the iterator,
+          <c>none</c> is returned.
+        </p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> Map = #{a => 1, b => 2, c => 3}.
+#{a => 1,b => 2,c => 3}
+> Iter = maps:iterator(Map).
+[{a,1},{b,2},{c,3}]
+> {_, _, Iter1} = maps:next(Iter).
+{a,1,[{b,2},{c,3}]}
+> {_, _, Iter2} = maps:next(Iter1).
+{b,2,[{c,3}]}
+> {_, _, Iter3} = maps:next(Iter2).
+{c,3,[]}
+> maps:next(Iter3).
+none</code>
+      </desc>
+    </func>
+
+    <func>
       <name name="put" arity="3"/>
       <fsummary></fsummary>
       <desc>
diff --git a/lib/stdlib/doc/src/notes.xml b/lib/stdlib/doc/src/notes.xml
index d396f1de8f..e26c4aba74 100644
--- a/lib/stdlib/doc/src/notes.xml
+++ b/lib/stdlib/doc/src/notes.xml
@@ -31,6 +31,105 @@
   </header>
   <p>This document describes the changes made to the STDLIB application.</p>
 
+<section><title>STDLIB 3.4.5</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    The <c>Module:init/1</c> function in <c>gen_statem</c>
+	    may return an actions list containing any action, but an
+	    erroneous check only allowed state enter actions so e.g
+	    <c>{next_event,internal,event}</c> caused a server crash.
+	    This bug has been fixed.</p>
+          <p>
+	    Own Id: OTP-13995</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>STDLIB 3.4.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Correct <c>filelib:find_source()</c> and
+	    <c>filelib:find_file()</c> to by default also search one
+	    level below <c>src</c>. This is in accordance with the
+	    Design Principles which states that an application can
+	    have Erlang source files one level below the <c>src</c>
+	    directory. </p>
+          <p>
+	    Own Id: OTP-14832 Aux Id: ERL-527 </p>
+        </item>
+        <item>
+	    <p> The contract of <c>erl_tar:table/2</c> is corrected.
+	    </p>
+          <p>
+	    Own Id: OTP-14860 Aux Id: PR 1670 </p>
+        </item>
+        <item>
+	    <p> Correct a few contracts. </p>
+          <p>
+	    Own Id: OTP-14889</p>
+        </item>
+        <item>
+          <p>
+	    Fix string:prefix/2 to handle an empty string as second
+	    argument.</p>
+          <p>
+	    Own Id: OTP-14942 Aux Id: PR-1702 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>STDLIB 3.4.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Make <c>ets:i/1</c> exit cleaner when ^D is input
+	    while browsing a table. Only the old Erlang shell is
+	    affected (<c>erl(1)</c> flag <c>-oldshell</c>). </p>
+          <p>
+	    Own Id: OTP-14663</p>
+        </item>
+        <item>
+          <p>
+	    Fixed handling of windows UNC paths in module
+	    <c>filename</c>.</p>
+          <p>
+	    Own Id: OTP-14693</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Improve performance of the new string functionality when
+	    handling ASCII characters.</p>
+          <p>
+	    Own Id: OTP-14670</p>
+        </item>
+        <item>
+          <p>
+	    Added a clarification to the documentation of
+	    <c>unicode:characters_to_list/2</c>.</p>
+          <p>
+	    Own Id: OTP-14798</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>STDLIB 3.4.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/stdlib/doc/src/ordsets.xml b/lib/stdlib/doc/src/ordsets.xml
index 7b590932e4..2d891d7a5a 100644
--- a/lib/stdlib/doc/src/ordsets.xml
+++ b/lib/stdlib/doc/src/ordsets.xml
@@ -142,6 +142,15 @@
     </func>
 
     <func>
+      <name name="is_empty" arity="1"/>
+      <fsummary>Test for empty set.</fsummary>
+      <desc>
+        <p>Returns <c>true</c> if <c><anno>Ordset</anno></c> is an empty set,
+          otherwise <c>false</c>.</p>
+      </desc>
+    </func>
+
+    <func>
       <name name="is_set" arity="1"/>
       <fsummary>Test for an <c>Ordset</c>.</fsummary>
       <desc>
diff --git a/lib/stdlib/doc/src/rand.xml b/lib/stdlib/doc/src/rand.xml
index 89fb858823..21f680a0ee 100644
--- a/lib/stdlib/doc/src/rand.xml
+++ b/lib/stdlib/doc/src/rand.xml
@@ -133,8 +133,9 @@
       variable <c>rand_seed</c> to remember the current state.</p>
 
     <p>If a process calls
-      <seealso marker="#uniform-0"><c>uniform/0</c></seealso> or
-      <seealso marker="#uniform-1"><c>uniform/1</c></seealso> without
+      <seealso marker="#uniform-0"><c>uniform/0</c></seealso>,
+      <seealso marker="#uniform-1"><c>uniform/1</c></seealso> or
+      <seealso marker="#uniform_real-0"><c>uniform_real/0</c></seealso> without
       setting a seed first, <seealso marker="#seed-1"><c>seed/1</c></seealso>
       is called automatically with the default algorithm and creates a
       non-constant seed.</p>
@@ -168,10 +169,17 @@ R3 = rand:uniform(),</pre>
 S0 = rand:seed_s(exrop),
 {R4, S1} = rand:uniform_s(S0),</pre>
 
+   <p>Textbook basic form Box-Muller standard normal deviate</p>
+
+   <pre>
+R5 = rand:uniform_real(),
+R6 = rand:uniform(),
+SND0 = math:sqrt(-2 * math:log(R5)) * math:cos(math:pi() * R6)</pre>
+
    <p>Create a standard normal deviate:</p>
 
    <pre>
-{SND0, S2} = rand:normal_s(S1),</pre>
+{SND1, S2} = rand:normal_s(S1),</pre>
 
    <p>Create a normal deviate with mean -3 and variance 0.5:</p>
 
@@ -414,7 +422,8 @@ tests. We suggest to use a sign test to extract a random Boolean value.</pre>
 	    This function may return exactly <c>0.0</c> which can be
 	    fatal for certain applications.  If that is undesired
 	    you can use <c>(1.0 - rand:uniform())</c> to get the
-	    interval <c>0.0 &lt; <anno>X</anno> =&lt; 1.0</c>.
+	    interval <c>0.0 &lt; <anno>X</anno> =&lt; 1.0</c>, or instead use
+	    <seealso marker="#uniform_real-0"><c>uniform_real/0</c></seealso>.
 	  </p>
 	  <p>
 	    If neither endpoint is desired you can test and re-try
@@ -432,6 +441,42 @@ end.</pre>
     </func>
 
     <func>
+      <name name="uniform_real" arity="0"/>
+      <fsummary>Return a random float.</fsummary>
+      <desc><marker id="uniform_real-0"/>
+        <p>
+	  Returns a random float
+	  uniformly distributed in the value range
+	  <c>DBL_MIN =&lt; <anno>X</anno> &lt; 1.0</c>
+	  and updates the state in the process dictionary.
+	</p>
+	<p>
+	  Conceptually, a random real number <c>R</c> is generated
+	  from the interval <c>0 =&lt; R &lt; 1</c> and then the
+	  closest rounded down normalized number
+	  in the IEEE 754 Double precision format
+	  is returned.
+	</p>
+	<note>
+	  <p>
+	    The generated numbers from this function has got better
+	    granularity for small numbers than the regular
+	    <seealso marker="#uniform-0"><c>uniform/0</c></seealso>
+	    because all bits in the mantissa are random.
+	    This property, in combination with the fact that exactly zero
+	    is never returned is useful for algoritms doing for example
+	    <c>1.0 / <anno>X</anno></c> or <c>math:log(<anno>X</anno>)</c>.
+	  </p>
+	</note>
+	<p>
+	  See
+	  <seealso marker="#uniform_real_s-1"><c>uniform_real_s/1</c></seealso>
+	  for more explanation.
+	</p>
+      </desc>
+    </func>
+
+    <func>
       <name name="uniform" arity="1"/>
       <fsummary>Return a random integer.</fsummary>
       <desc><marker id="uniform-1"/>
@@ -460,7 +505,8 @@ end.</pre>
 	    This function may return exactly <c>0.0</c> which can be
 	    fatal for certain applications.  If that is undesired
 	    you can use <c>(1.0 - rand:uniform(State))</c> to get the
-	    interval <c>0.0 &lt; <anno>X</anno> =&lt; 1.0</c>.
+	    interval <c>0.0 &lt; <anno>X</anno> =&lt; 1.0</c>, or instead use
+	    <seealso marker="#uniform_real_s-1"><c>uniform_real_s/1</c></seealso>.
 	  </p>
 	  <p>
 	    If neither endpoint is desired you can test and re-try
@@ -478,6 +524,68 @@ end.</pre>
     </func>
 
     <func>
+      <name name="uniform_real_s" arity="1"/>
+      <fsummary>Return a random float.</fsummary>
+      <desc>
+        <p>
+	  Returns, for a specified state, a random float
+	  uniformly distributed in the value range
+	  <c>DBL_MIN =&lt; <anno>X</anno> &lt; 1.0</c>
+	  and updates the state in the process dictionary.
+	</p>
+	<p>
+	  Conceptually, a random real number <c>R</c> is generated
+	  from the interval <c>0 =&lt; R &lt; 1</c> and then the
+	  closest rounded down normalized number
+	  in the IEEE 754 Double precision format
+	  is returned.
+	</p>
+	<note>
+	  <p>
+	    The generated numbers from this function has got better
+	    granularity for small numbers than the regular
+	    <seealso marker="#uniform_s-1"><c>uniform_s/1</c></seealso>
+	    because all bits in the mantissa are random.
+	    This property, in combination with the fact that exactly zero
+	    is never returned is useful for algoritms doing for example
+	    <c>1.0 / <anno>X</anno></c> or <c>math:log(<anno>X</anno>)</c>.
+	  </p>
+	</note>
+	<p>
+	  The concept implicates that the probability to get
+	  exactly zero is extremely low; so low that this function
+	  is in fact guaranteed to never return zero.  The smallest
+	  number that it might return is <c>DBL_MIN</c>, which is
+	  2.0^(-1022).
+	</p>
+	<p>
+	  The value range stated at the top of this function
+	  description is technically correct, but
+	  <c>0.0 =&lt; <anno>X</anno> &lt; 1.0</c>
+	  is a better description of the generated numbers'
+	  statistical distribution.  Except that exactly 0.0
+	  is never returned, which is not possible to observe
+	  statistically.
+	</p>
+	<p>
+	  For example; for all sub ranges
+	  <c>N*2.0^(-53) =&lt; X &lt; (N+1)*2.0^(-53)</c>
+	  where
+	  <c>0 =&lt; integer(N) &lt; 2.0^53</c>
+	  the probability is the same.
+	  Compare that with the form of the numbers generated by
+	  <seealso marker="#uniform_s-1"><c>uniform_s/1</c></seealso>.
+	</p>
+	<p>
+	  Having to generate extra random bits for
+	  small numbers costs a little performance.
+	  This function is about 20% slower than the regular
+	  <seealso marker="#uniform_s-1"><c>uniform_s/1</c></seealso>
+	</p>
+      </desc>
+    </func>
+
+    <func>
       <name name="uniform_s" arity="2"/>
       <fsummary>Return a random integer.</fsummary>
       <desc>
diff --git a/lib/stdlib/doc/src/ref_man.xml b/lib/stdlib/doc/src/ref_man.xml
index 878a3babc5..68bfddbc71 100644
--- a/lib/stdlib/doc/src/ref_man.xml
+++ b/lib/stdlib/doc/src/ref_man.xml
@@ -93,6 +93,7 @@
   <xi:include href="sys.xml"/>
   <xi:include href="timer.xml"/>
   <xi:include href="unicode.xml"/>
+  <xi:include href="uri_string.xml"/>
   <xi:include href="win32reg.xml"/>
   <xi:include href="zip.xml"/>
 </application>
diff --git a/lib/stdlib/doc/src/sets.xml b/lib/stdlib/doc/src/sets.xml
index 4934bed365..1ed96ddc3f 100644
--- a/lib/stdlib/doc/src/sets.xml
+++ b/lib/stdlib/doc/src/sets.xml
@@ -140,6 +140,15 @@
     </func>
 
     <func>
+      <name name="is_empty" arity="1"/>
+      <fsummary>Test for empty set.</fsummary>
+      <desc>
+        <p>Returns <c>true</c> if <c><anno>Set</anno></c> is an empty set,
+          otherwise <c>false</c>.</p>
+      </desc>
+    </func>
+
+    <func>
       <name name="is_set" arity="1"/>
       <fsummary>Test for a <c>Set</c>.</fsummary>
       <desc>
diff --git a/lib/stdlib/doc/src/specs.xml b/lib/stdlib/doc/src/specs.xml
index 45b207b13d..d559adf9b6 100644
--- a/lib/stdlib/doc/src/specs.xml
+++ b/lib/stdlib/doc/src/specs.xml
@@ -60,6 +60,7 @@
   <xi:include href="../specs/specs_sys.xml"/>
   <xi:include href="../specs/specs_timer.xml"/>
   <xi:include href="../specs/specs_unicode.xml"/>
+  <xi:include href="../specs/specs_uri_string.xml"/>
   <xi:include href="../specs/specs_win32reg.xml"/>
   <xi:include href="../specs/specs_zip.xml"/>
 </specs>
diff --git a/lib/stdlib/doc/src/string.xml b/lib/stdlib/doc/src/string.xml
index 130fc74a28..c7772d63a3 100644
--- a/lib/stdlib/doc/src/string.xml
+++ b/lib/stdlib/doc/src/string.xml
@@ -109,8 +109,10 @@
     <p>This module has been reworked in Erlang/OTP 20 to
     handle <seealso marker="unicode#type-chardata">
     <c>unicode:chardata()</c></seealso> and operate on grapheme
-    clusters. The <c>old functions</c> that only work on Latin-1 lists as input
-    are kept for backwards compatibility reasons but should not be used.
+    clusters. The <seealso marker="#oldapi"> <c>old
+    functions</c></seealso> that only work on Latin-1 lists as input
+    are still available but should not be used, they will be
+    deprecated in a future release.
     </p>
   </description>
 
@@ -629,5 +631,393 @@ ÖÄÅ</pre>
     </func>
 
   </funcs>
+
+  <section>
+    <marker id="oldapi"/>
+    <title>Obsolete API functions</title>
+    <p>Here follows the function of the old API.
+    These functions only work on a list of Latin-1 characters.
+    </p>
+    <note><p>
+      The functions are kept for backward compatibility, but are
+      not recommended.
+      They will be deprecated in Erlang/OTP 21.
+    </p>
+    <p>Any undocumented functions in <c>string</c> are not to be used.</p>
+    </note>
+  </section>
+
+  <funcs>
+    <func>
+      <name name="centre" arity="2"/>
+      <name name="centre" arity="3"/>
+      <fsummary>Center a string.</fsummary>
+      <desc>
+        <p>Returns a string, where <c><anno>String</anno></c> is centered in the
+          string and surrounded by blanks or <c><anno>Character</anno></c>.
+	  The resulting string has length <c><anno>Number</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#pad/3"><c>pad/3</c></seealso>.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="chars" arity="2"/>
+      <name name="chars" arity="3"/>
+      <fsummary>Return a string consisting of numbers of characters.</fsummary>
+      <desc>
+        <p>Returns a string consisting of <c><anno>Number</anno></c> characters
+          <c><anno>Character</anno></c>. Optionally, the string can end with
+          string <c><anno>Tail</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="lists#duplicate/2"><c>lists:duplicate/2</c></seealso>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="chr" arity="2"/>
+      <fsummary>Return the index of the first occurrence of
+        a character in a string.</fsummary>
+      <desc>
+        <p>Returns the index of the first occurrence of
+          <c><anno>Character</anno></c> in <c><anno>String</anno></c>. Returns
+          <c>0</c> if <c><anno>Character</anno></c> does not occur.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#find/2"><c>find/2</c></seealso>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="concat" arity="2"/>
+      <fsummary>Concatenate two strings.</fsummary>
+      <desc>
+        <p>Concatenates <c><anno>String1</anno></c> and
+          <c><anno>String2</anno></c> to form a new string
+          <c><anno>String3</anno></c>, which is returned.</p>
+	<p>
+	  This function is <seealso marker="#oldapi">obsolete</seealso>.
+	  Use <c>[<anno>String1</anno>, <anno>String2</anno>]</c> as
+	  <c>Data</c> argument, and call
+	  <seealso marker="unicode#characters_to_list/2">
+	  <c>unicode:characters_to_list/2</c></seealso> or
+	  <seealso marker="unicode#characters_to_binary/2">
+	  <c>unicode:characters_to_binary/2</c></seealso>
+	  to flatten the output.
+	</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="copies" arity="2"/>
+      <fsummary>Copy a string.</fsummary>
+      <desc>
+        <p>Returns a string containing <c><anno>String</anno></c> repeated
+          <c><anno>Number</anno></c> times.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="lists#duplicate/2"><c>lists:duplicate/2</c></seealso>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="cspan" arity="2"/>
+      <fsummary>Span characters at start of a string.</fsummary>
+      <desc>
+        <p>Returns the length of the maximum initial segment of
+          <c><anno>String</anno></c>, which consists entirely of characters
+          not from <c><anno>Chars</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#take/3"><c>take/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:cspan("\t    abcdef", " \t").
+0</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="join" arity="2"/>
+      <fsummary>Join a list of strings with separator.</fsummary>
+      <desc>
+        <p>Returns a string with the elements of <c><anno>StringList</anno></c>
+          separated by the string in <c><anno>Separator</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="lists#join/2"><c>lists:join/2</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> join(["one", "two", "three"], ", ").
+"one, two, three"</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="left" arity="2"/>
+      <name name="left" arity="3"/>
+      <fsummary>Adjust left end of a string.</fsummary>
+      <desc>
+        <p>Returns <c><anno>String</anno></c> with the length adjusted in
+          accordance with <c><anno>Number</anno></c>. The left margin is
+          fixed. If <c>length(<anno>String</anno>)</c> &lt;
+          <c><anno>Number</anno></c>, then <c><anno>String</anno></c> is padded
+          with blanks or <c><anno>Character</anno></c>s.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#pad/2"><c>pad/2</c></seealso> or
+	<seealso marker="#pad/3"><c>pad/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:left("Hello",10,$.).
+"Hello....."</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="len" arity="1"/>
+      <fsummary>Return the length of a string.</fsummary>
+      <desc>
+        <p>Returns the number of characters in <c><anno>String</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#length/1"><c>length/1</c></seealso>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="rchr" arity="2"/>
+      <fsummary>Return the index of the last occurrence of
+        a character in a string.</fsummary>
+      <desc>
+        <p>Returns the index of the last occurrence of
+          <c><anno>Character</anno></c> in <c><anno>String</anno></c>. Returns
+          <c>0</c> if <c><anno>Character</anno></c> does not occur.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#find/3"><c>find/3</c></seealso>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="right" arity="2"/>
+      <name name="right" arity="3"/>
+      <fsummary>Adjust right end of a string.</fsummary>
+      <desc>
+        <p>Returns <c><anno>String</anno></c> with the length adjusted in
+          accordance with <c><anno>Number</anno></c>. The right margin is
+          fixed. If the length of <c>(<anno>String</anno>)</c> &lt;
+          <c><anno>Number</anno></c>, then <c><anno>String</anno></c> is padded
+          with blanks or <c><anno>Character</anno></c>s.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#pad/3"><c>pad/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:right("Hello", 10, $.).
+".....Hello"</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="rstr" arity="2"/>
+      <fsummary>Find the index of a substring.</fsummary>
+      <desc>
+        <p>Returns the position where the last occurrence of
+          <c><anno>SubString</anno></c> begins in <c><anno>String</anno></c>.
+          Returns <c>0</c> if <c><anno>SubString</anno></c>
+          does not exist in <c><anno>String</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#find/3"><c>find/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:rstr(" Hello Hello World World ", "Hello World").
+8</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="span" arity="2"/>
+      <fsummary>Span characters at start of a string.</fsummary>
+      <desc>
+        <p>Returns the length of the maximum initial segment of
+          <c><anno>String</anno></c>, which consists entirely of characters
+          from <c><anno>Chars</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#take/2"><c>take/2</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:span("\t    abcdef", " \t").
+5</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="str" arity="2"/>
+      <fsummary>Find the index of a substring.</fsummary>
+      <desc>
+        <p>Returns the position where the first occurrence of
+          <c><anno>SubString</anno></c> begins in <c><anno>String</anno></c>.
+          Returns <c>0</c> if <c><anno>SubString</anno></c>
+          does not exist in <c><anno>String</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#find/2"><c>find/2</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:str(" Hello Hello World World ", "Hello World").
+8</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="strip" arity="1"/>
+      <name name="strip" arity="2"/>
+      <name name="strip" arity="3"/>
+      <fsummary>Strip leading or trailing characters.</fsummary>
+      <desc>
+        <p>Returns a string, where leading or trailing, or both, blanks or a
+          number of <c><anno>Character</anno></c> have been removed.
+          <c><anno>Direction</anno></c>, which can be <c>left</c>, <c>right</c>,
+          or <c>both</c>, indicates from which direction blanks are to be
+          removed. <c>strip/1</c> is equivalent to
+          <c>strip(String, both)</c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#trim/3"><c>trim/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:strip("...Hello.....", both, $.).
+"Hello"</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="sub_string" arity="2"/>
+      <name name="sub_string" arity="3"/>
+      <fsummary>Extract a substring.</fsummary>
+      <desc>
+        <p>Returns a substring of <c><anno>String</anno></c>, starting at
+          position <c><anno>Start</anno></c> to the end of the string, or to
+          and including position <c><anno>Stop</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#slice/3"><c>slice/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+sub_string("Hello World", 4, 8).
+"lo Wo"</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="substr" arity="2"/>
+      <name name="substr" arity="3"/>
+      <fsummary>Return a substring of a string.</fsummary>
+      <desc>
+        <p>Returns a substring of <c><anno>String</anno></c>, starting at
+          position <c><anno>Start</anno></c>, and ending at the end of the
+          string or at length <c><anno>Length</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#slice/3"><c>slice/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> substr("Hello World", 4, 5).
+"lo Wo"</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="sub_word" arity="2"/>
+      <name name="sub_word" arity="3"/>
+      <fsummary>Extract subword.</fsummary>
+      <desc>
+        <p>Returns the word in position <c><anno>Number</anno></c> of
+          <c><anno>String</anno></c>. Words are separated by blanks or
+          <c><anno>Character</anno></c>s.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#nth_lexeme/3"><c>nth_lexeme/3</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> string:sub_word(" Hello old boy !",3,$o).
+"ld b"</code>
+      </desc>
+    </func>
+
+    <func>
+      <name name="to_lower" arity="1" clause_i="1"/>
+      <name name="to_lower" arity="1" clause_i="2"/>
+      <name name="to_upper" arity="1" clause_i="1"/>
+      <name name="to_upper" arity="1" clause_i="2"/>
+      <fsummary>Convert case of string (ISO/IEC 8859-1).</fsummary>
+      <type variable="String" name_i="1"/>
+      <type variable="Result" name_i="1"/>
+      <type variable="Char"/>
+      <type variable="CharResult"/>
+      <desc>
+        <p>The specified string or character is case-converted. Notice that
+          the supported character set is ISO/IEC 8859-1 (also called Latin 1);
+          all values outside this set are unchanged</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso> use
+	<seealso marker="#lowercase/1"><c>lowercase/1</c></seealso>,
+	<seealso marker="#uppercase/1"><c>uppercase/1</c></seealso>,
+	<seealso marker="#titlecase/1"><c>titlecase/1</c></seealso> or
+	<seealso marker="#casefold/1"><c>casefold/1</c></seealso>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="tokens" arity="2"/>
+      <fsummary>Split string into tokens.</fsummary>
+      <desc>
+        <p>Returns a list of tokens in <c><anno>String</anno></c>, separated
+          by the characters in <c><anno>SeparatorList</anno></c>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> tokens("abc defxxghix jkl", "x ").
+["abc", "def", "ghi", "jkl"]</code>
+        <p>Notice that, as shown in this example, two or more
+          adjacent separator characters in <c><anno>String</anno></c>
+          are treated as one. That is, there are no empty
+          strings in the resulting list of tokens.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#lexemes/2"><c>lexemes/2</c></seealso>.</p>
+      </desc>
+    </func>
+
+    <func>
+      <name name="words" arity="1"/>
+      <name name="words" arity="2"/>
+      <fsummary>Count blank separated words.</fsummary>
+      <desc>
+        <p>Returns the number of words in <c><anno>String</anno></c>, separated
+          by blanks or <c><anno>Character</anno></c>.</p>
+	<p>This function is <seealso marker="#oldapi">obsolete</seealso>.
+	Use
+	<seealso marker="#lexemes/2"><c>lexemes/2</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <code type="none">
+> words(" Hello old boy!", $o).
+4</code>
+      </desc>
+    </func>
+  </funcs>
+
+  <section>
+    <title>Notes</title>
+    <p>Some of the general string functions can seem to overlap each
+      other. The reason is that this string package is the
+      combination of two earlier packages and all functions of
+      both packages have been retained.</p>
+  </section>
+
 </erlref>
 
diff --git a/lib/stdlib/doc/src/timer.xml b/lib/stdlib/doc/src/timer.xml
index fcaccdb2cb..350847bf7d 100644
--- a/lib/stdlib/doc/src/timer.xml
+++ b/lib/stdlib/doc/src/timer.xml
@@ -270,7 +270,7 @@
           <item>
             <p>Evaluates <c>apply(<anno>Module</anno>, <anno>Function</anno>,
               <anno>Arguments</anno>)</c> and measures the elapsed real time as 
-              reported by <seealso marker="os:timestamp/0">
+              reported by <seealso marker="kernel:os#timestamp/0">
               <c>os:timestamp/0</c></seealso>.</p>
             <p>Returns <c>{<anno>Time</anno>, <anno>Value</anno>}</c>, where
               <c><anno>Time</anno></c> is the elapsed real time in
diff --git a/lib/stdlib/doc/src/unicode.xml b/lib/stdlib/doc/src/unicode.xml
index e86f45431f..d822aca89c 100644
--- a/lib/stdlib/doc/src/unicode.xml
+++ b/lib/stdlib/doc/src/unicode.xml
@@ -239,8 +239,13 @@
               <c><anno>InEncoding</anno></c>.</p>
           </item>
         </list>
-        <p>Only when <c><anno>InEncoding</anno></c> is one of the UTF
-          encodings, integers in the list are allowed to be &gt; 255.</p>
+	<p>
+	  Note that integers in the list always represent code points
+	  regardless of <c><anno>InEncoding</anno></c> passed. If
+	  <c><anno>InEncoding</anno> latin1</c> is passed, only code
+	  points &lt; 256 are allowed; otherwise, all valid unicode code
+	  points are allowed.
+	</p>
         <p>If <c><anno>InEncoding</anno></c> is <c>latin1</c>, parameter
           <c><anno>Data</anno></c> corresponds to the <c>iodata()</c> type,
           but for <c>unicode</c>, parameter <c><anno>Data</anno></c> can
diff --git a/lib/stdlib/doc/src/uri_string.xml b/lib/stdlib/doc/src/uri_string.xml
new file mode 100644
index 0000000000..88d4600611
--- /dev/null
+++ b/lib/stdlib/doc/src/uri_string.xml
@@ -0,0 +1,359 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE erlref SYSTEM "erlref.dtd">
+
+<erlref>
+  <header>
+    <copyright>
+      <year>2017</year><year>2018</year>
+      <holder>Ericsson AB. All Rights Reserved.</holder>
+    </copyright>
+    <legalnotice>
+      Licensed under the Apache License, Version 2.0 (the "License");
+      you may not use this file except in compliance with the License.
+      You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+      Unless required by applicable law or agreed to in writing, software
+      distributed under the License is distributed on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+      See the License for the specific language governing permissions and
+      limitations under the License.
+    </legalnotice>
+
+    <title>uri_string</title>
+    <prepared>Péter Dimitrov</prepared>
+    <docno>1</docno>
+    <date>2018-02-07</date>
+    <rev>A</rev>
+  </header>
+  <module>uri_string</module>
+  <modulesummary>URI processing functions.</modulesummary>
+  <description>
+    <p>This module contains functions for parsing and handling URIs
+    (<url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url>) and
+    form-urlencoded query strings (<url href="https://www.w3.org/TR/html52/">HTML 5.2</url>).
+    </p>
+    <p>
+    Parsing and serializing non-UTF-8 form-urlencoded query strings are also supported
+    (<url href="https://www.w3.org/TR/html50/">HTML 5.0</url>).
+    </p>
+    <p>A URI is an identifier consisting of a sequence of characters   matching the syntax
+    rule named <em>URI</em> in <url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url>.
+    </p>
+    <p>  The generic URI syntax consists of a hierarchical sequence of components referred
+    to as the scheme, authority, path, query, and fragment:</p>
+    <pre>
+    URI         = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
+    hier-part   = "//" authority path-abempty
+                   / path-absolute
+                   / path-rootless
+                   / path-empty
+    scheme      = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
+    authority   = [ userinfo "@" ] host [ ":" port ]
+    userinfo    = *( unreserved / pct-encoded / sub-delims / ":" )
+
+    reserved    = gen-delims / sub-delims
+    gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
+    sub-delims  = "!" / "$" / "&amp;" / "'" / "(" / ")"
+                / "*" / "+" / "," / ";" / "="
+
+    unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"
+    </pre><br></br>
+    <p>The interpretation of a URI depends only on the characters used and not on how those
+    characters are represented in a network protocol.</p>
+    <p>The functions implemented by this module cover the following use cases:</p>
+    <list type="bulleted">
+      <item>Parsing URIs into its components and returing a map<br></br>
+      <seealso marker="#parse/1"><c>parse/1</c></seealso>
+      </item>
+      <item>Recomposing a map of URI components into a URI string<br></br>
+      <seealso marker="#recompose/1"><c>recompose/1</c></seealso>
+      </item>
+      <item>Changing inbound binary and percent-encoding of URIs<br></br>
+      <seealso marker="#transcode/2"><c>transcode/2</c></seealso>
+      </item>
+      <item>Transforming URIs into a normalized form<br></br>
+      <seealso marker="#normalize/1"><c>normalize/1</c></seealso><br></br>
+      <seealso marker="#normalize/2"><c>normalize/2</c></seealso>
+      </item>
+      <item>Composing form-urlencoded query strings from a list of key-value pairs<br></br>
+      <seealso marker="#compose_query/1"><c>compose_query/1</c></seealso><br></br>
+      <seealso marker="#compose_query/2"><c>compose_query/2</c></seealso>
+      </item>
+      <item>Dissecting form-urlencoded query strings into a list of key-value pairs<br></br>
+      <seealso marker="#dissect_query/1"><c>dissect_query/1</c></seealso>
+      </item>
+    </list>
+    <p>There are four different encodings present during the handling of URIs:</p>
+    <list type="bulleted">
+      <item>Inbound binary encoding in binaries</item>
+      <item>Inbound percent-encoding in lists and binaries</item>
+      <item>Outbound binary encoding in binaries</item>
+      <item>Outbound percent-encoding in lists and binaries</item>
+    </list>
+    <p>Functions with <c>uri_string()</c> argument accept lists, binaries and
+    mixed lists (lists with binary elements) as input type. All of the functions but
+    <c>transcode/2</c> expects input as lists of unicode codepoints, UTF-8 encoded binaries
+    and UTF-8 percent-encoded URI parts ("%C3%B6" corresponds to the unicode character "ö").</p>
+    <p>Unless otherwise specified the return value type and encoding are the same as the input
+    type and encoding. That is, binary input returns binary output, list input returns a list
+    output but mixed input returns list output.</p>
+    <p>In case of lists there is only percent-encoding. In binaries, however, both binary encoding
+    and percent-encoding shall be considered. <c>transcode/2</c> provides the means to convert
+    between the supported encodings, it takes a <c>uri_string()</c> and a list of options
+    specifying inbound and outbound encodings.</p>
+    <p><url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url> does not mandate any specific
+    character encoding and it is usually defined by the protocol or surrounding text. This library
+    takes the same assumption, binary and percent-encoding are handled as one configuration unit,
+    they cannot be set to different values.</p>
+  </description>
+
+  <datatypes>
+    <datatype>
+      <name name="error"/>
+      <desc>
+        <p>Error tuple indicating the type of error. Possible values of the second component:</p>
+	<list type="bulleted">
+	  <item><c>invalid_character</c></item>
+	  <item><c>invalid_encoding</c></item>
+	  <item><c>invalid_input</c></item>
+	  <item><c>invalid_map</c></item>
+	  <item><c>invalid_percent_encoding</c></item>
+	  <item><c>invalid_scheme</c></item>
+	  <item><c>invalid_uri</c></item>
+	  <item><c>invalid_utf8</c></item>
+	  <item><c>missing_value</c></item>
+	</list>
+	<p>The third component is a term providing additional information about the
+	cause of the error.</p>
+      </desc>
+    </datatype>
+    <datatype>
+      <name name="uri_map"/>
+      <desc>
+        <p>Map holding the main components of a URI.</p>
+      </desc>
+    </datatype>
+    <datatype>
+      <name name="uri_string"/>
+      <desc>
+        <p>List of unicode codepoints, a UTF-8 encoded binary, or a mix of the two,
+        representing an <url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url>
+	compliant URI (<em>percent-encoded form</em>).
+        A URI is a sequence of characters from a very limited set: the letters of
+        the basic Latin alphabet, digits, and a few special characters.</p>
+      </desc>
+    </datatype>
+  </datatypes>
+
+  <funcs>
+
+    <func>
+      <name name="compose_query" arity="1"/>
+      <fsummary>Compose urlencoded query string.</fsummary>
+      <desc>
+        <p>Composes a form-urlencoded <c><anno>QueryString</anno></c> based on a
+	<c><anno>QueryList</anno></c>, a list of non-percent-encoded key-value pairs.
+        Form-urlencoding is defined in section
+	4.10.21.6 of the <url href="https://www.w3.org/TR/html52/">HTML 5.2</url>
+	specification and in section 4.10.22.6 of the
+	<url href="https://www.w3.org/TR/html50/">HTML 5.0</url> specification for
+	non-UTF-8 encodings.
+	</p>
+	<p>See also the opposite operation <seealso marker="#dissect_query/1">
+	<c>dissect_query/1</c></seealso>.
+	</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input>uri_string:compose_query([{"foo bar","1"},{"city","örebro"}]).</input>
+<![CDATA["foo+bar=1&city=%C3%B6rebro"]]>
+2> <![CDATA[uri_string:compose_query([{<<"foo bar">>,<<"1">>},
+2> {<<"city">>,<<"örebro"/utf8>>}]).]]>
+<![CDATA[<<"foo+bar=1&city=%C3%B6rebro">>]]>
+	</pre>
+      </desc>
+    </func>
+
+    <func>
+      <name name="compose_query" arity="2"/>
+      <fsummary>Compose urlencoded query string.</fsummary>
+      <desc>
+        <p>Same as <c>compose_query/1</c> but with an additional
+	<c><anno>Options</anno></c> parameter, that controls the encoding ("charset")
+	used by the encoding algorithm. There are two supported encodings: <c>utf8</c>
+	(or <c>unicode</c>) and <c>latin1</c>.
+	</p>
+	<p>Each character in the entry's name and value that cannot be expressed using
+	the selected character encoding, is replaced by a string consisting of a U+0026
+	AMPERSAND character (<![CDATA[&]]>), a "#" (U+0023) character, one or more ASCII
+	digits representing the Unicode code point of the character in base ten, and
+	finally	a ";" (U+003B) character.
+	</p>
+	<p>Bytes that are out of the range 0x2A, 0x2D, 0x2E, 0x30 to 0x39, 0x41 to 0x5A, 0x5F,
+	0x61 to 0x7A, are percent-encoded (U+0025 PERCENT SIGN character (%) followed by
+	uppercase ASCII hex digits representing the hexadecimal value of the byte).
+	</p>
+	<p>See also the opposite operation <seealso marker="#dissect_query/1">
+	<c>dissect_query/1</c></seealso>.
+	</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input>uri_string:compose_query([{"foo bar","1"},{"city","örebro"}],</input>
+1> [{encoding, latin1}]).
+<![CDATA["foo+bar=1&city=%F6rebro"
+2> uri_string:compose_query([{<<"foo bar">>,<<"1">>},
+2> {<<"city">>,<<"東京"/utf8>>}], [{encoding, latin1}]).]]>
+<![CDATA[<<"foo+bar=1&city=%26%2326481%3B%26%2320140%3B">>]]>
+	</pre>
+      </desc>
+    </func>
+
+    <func>
+      <name name="dissect_query" arity="1"/>
+      <fsummary>Dissect query string.</fsummary>
+      <desc>
+        <p>Dissects an urlencoded <c><anno>QueryString</anno></c> and returns a
+	<c><anno>QueryList</anno></c>, a list of non-percent-encoded key-value pairs.
+        Form-urlencoding is defined in section
+	4.10.21.6 of the <url href="https://www.w3.org/TR/html52/">HTML 5.2</url>
+	specification and in section 4.10.22.6 of the
+	<url href="https://www.w3.org/TR/html50/">HTML 5.0</url> specification for
+	non-UTF-8 encodings.
+	</p>
+	<p>See also the opposite operation <seealso marker="#compose_query/1">
+	<c>compose_query/1</c></seealso>.
+	</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input><![CDATA[uri_string:dissect_query("foo+bar=1&city=%C3%B6rebro").]]></input>
+[{"foo bar","1"},{"city","örebro"}]
+2> <![CDATA[uri_string:dissect_query(<<"foo+bar=1&city=%26%2326481%3B%26%2320140%3B">>).]]>
+<![CDATA[[{<<"foo bar">>,<<"1">>},
+ {<<"city">>,<<230,157,177,228,186,172>>}] ]]>
+	</pre>
+      </desc>
+    </func>
+
+    <func>
+      <name name="normalize" arity="1"/>
+      <fsummary>Syntax-based normalization.</fsummary>
+      <desc>
+        <p>Transforms an <c><anno>URI</anno></c> into a normalized form
+	using Syntax-Based Normalization as defined by
+	<url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url>.</p>
+	<p>This function implements case normalization, percent-encoding
+	normalization, path segment normalization and scheme based normalization
+	for HTTP(S) with basic support for FTP, SSH, SFTP and TFTP.</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input>uri_string:normalize("/a/b/c/./../../g").</input>
+"/a/g"
+2> <![CDATA[uri_string:normalize(<<"mid/content=5/../6">>).]]>
+<![CDATA[<<"mid/6">>]]>
+3> uri_string:normalize("http://localhost:80").
+"https://localhost/"
+4> <input>uri_string:normalize(#{scheme => "http",port => 80,path => "/a/b/c/./../../g",</input>
+4> host => "localhost-örebro"}).
+"http://localhost-%C3%B6rebro/a/g"
+	</pre>
+      </desc>
+    </func>
+
+    <func>
+      <name name="normalize" arity="2"/>
+      <fsummary>Syntax-based normalization.</fsummary>
+      <desc>
+	<p>Same as <c>normalize/1</c> but with an additional
+	<c><anno>Options</anno></c> parameter, that controls if the normalized URI
+	shall be returned as an uri_map().
+	There is one supported option: <c>return_map</c>.
+	</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input>uri_string:normalize("/a/b/c/./../../g", [return_map]).</input>
+#{path => "/a/g"}
+2> <![CDATA[uri_string:normalize(<<"mid/content=5/../6">>, [return_map]).]]>
+<![CDATA[#{path => <<"mid/6">>}]]>
+3> uri_string:normalize("http://localhost:80", [return_map]).
+#{scheme => "http",path => "/",host => "localhost"}
+4> <input>uri_string:normalize(#{scheme => "http",port => 80,path => "/a/b/c/./../../g",</input>
+4> host => "localhost-örebro"}, [return_map]).
+#{scheme => "http",path => "/a/g",host => "localhost-örebro"}
+	</pre>
+      </desc>
+    </func>
+
+    <func>
+      <name name="parse" arity="1"/>
+      <fsummary>Parse URI into a map.</fsummary>
+      <desc>
+        <p>Parses an <url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url>
+	compliant <c>uri_string()</c> into a <c>uri_map()</c>, that holds the parsed
+	components of the <c>URI</c>.
+	If parsing fails, an error tuple is returned.</p>
+	<p>See also the opposite operation <seealso marker="#recompose/1">
+	<c>recompose/1</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input>uri_string:parse("foo://[email protected]:8042/over/there?name=ferret#nose").</input>
+#{fragment => "nose",host => "example.com",
+  path => "/over/there",port => 8042,query => "name=ferret",
+  scheme => foo,userinfo => "user"}
+2> <![CDATA[uri_string:parse(<<"foo://[email protected]:8042/over/there?name=ferret">>).]]>
+<![CDATA[#{host => <<"example.com">>,path => <<"/over/there">>,
+  port => 8042,query => <<"name=ferret">>,scheme => <<"foo">>,
+  userinfo => <<"user">>}]]>
+	</pre>
+      </desc>
+    </func>
+
+    <func>
+      <name name="recompose" arity="1"/>
+      <fsummary>Recompose URI.</fsummary>
+      <desc>
+        <p>Creates an <url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url> compliant
+	<c><anno>URIString</anno></c> (percent-encoded), based on the components of
+	<c><anno>URIMap</anno></c>.
+	If the <c><anno>URIMap</anno></c> is invalid, an error tuple is returned.</p>
+	<p>See also the opposite operation <seealso marker="#parse/1">
+	<c>parse/1</c></seealso>.</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input>URIMap = #{fragment => "nose", host => "example.com", path => "/over/there",</input>
+1> port => 8042, query => "name=ferret", scheme => "foo", userinfo => "user"}.
+#{fragment => "top",host => "example.com",
+  path => "/over/there",port => 8042,query => "?name=ferret",
+  scheme => foo,userinfo => "user"}
+
+2> <input>uri_string:recompose(URIMap).</input>
+"foo://example.com:8042/over/there?name=ferret#nose"</pre>
+      </desc>
+    </func>
+
+    <func>
+      <name name="transcode" arity="2"/>
+      <fsummary>Transcode URI.</fsummary>
+      <desc>
+        <p>Transcodes an <url href="https://www.ietf.org/rfc/rfc3986.txt">RFC 3986</url>
+	compliant <c><anno>URIString</anno></c>,
+	where <c><anno>Options</anno></c> is a list of tagged tuples, specifying the inbound
+	(<c>in_encoding</c>) and outbound (<c>out_encoding</c>) encodings. <c>in_encoding</c>
+	and <c>out_encoding</c> specifies both binary encoding and percent-encoding for the
+	input and output data. Mixed encoding, where binary encoding is not the same as
+	percent-encoding, is not supported.
+	If an argument is invalid, an error tuple is returned.</p>
+        <p><em>Example:</em></p>
+        <pre>
+1> <input><![CDATA[uri_string:transcode(<<"foo%00%00%00%F6bar"/utf32>>,]]></input>
+1> [{in_encoding, utf32},{out_encoding, utf8}]).
+<![CDATA[<<"foo%C3%B6bar"/utf8>>]]>
+2> uri_string:transcode("foo%F6bar", [{in_encoding, latin1},
+2> {out_encoding, utf8}]).
+"foo%C3%B6bar"
+	</pre>
+      </desc>
+    </func>
+
+  </funcs>
+</erlref>
diff --git a/lib/stdlib/include/assert.hrl b/lib/stdlib/include/assert.hrl
index 2fbaeba0b2..2ec89e7d8a 100644
--- a/lib/stdlib/include/assert.hrl
+++ b/lib/stdlib/include/assert.hrl
@@ -309,7 +309,7 @@
                                        {unexpected_success, __V}]})
             catch
                 Class:Term -> ok;
-                __C:__T ->
+                __C:__T:__S ->
                     erlang:error({assertException,
                                   [{module, ?MODULE},
                                    {line, ?LINE},
@@ -318,8 +318,7 @@
                                     "{ "++(??Class)++" , "++(??Term)
                                     ++" , [...] }"},
                                    {unexpected_exception,
-                                    {__C, __T,
-                                     erlang:get_stacktrace()}}]})
+                                    {__C, __T, __S}}]})
             end
           end)())
         end).
@@ -338,7 +337,7 @@
                                        {unexpected_success, __V}]})
             catch
                 Class:Term -> ok;
-                __C:__T ->
+                __C:__T:__S ->
                     erlang:error({assertException,
                                   [{module, ?MODULE},
                                    {line, ?LINE},
@@ -348,8 +347,7 @@
                                     "{ "++(??Class)++" , "++(??Term)
                                     ++" , [...] }"},
                                    {unexpected_exception,
-                                    {__C, __T,
-                                     erlang:get_stacktrace()}}]})
+                                    {__C, __T, __S}}]})
             end
           end)())
         end).
@@ -378,7 +376,7 @@
             try (Expr) of
                 _ -> ok
             catch
-                __C:__T ->
+                __C:__T:__S ->
                     case __C of
                         Class ->
                             case __T of
@@ -391,9 +389,7 @@
                                                     "{ "++(??Class)++" , "
                                                     ++(??Term)++" , [...] }"},
                                                    {unexpected_exception,
-                                                    {__C, __T,
-                                                     erlang:get_stacktrace()
-                                                    }}]});
+                                                    {__C, __T, __S}}]});
                                 _ -> ok
                             end;
                         _ -> ok
@@ -407,7 +403,7 @@
             try (Expr) of
                 _ -> ok
             catch
-                __C:__T ->
+                __C:__T:__S ->
                     case __C of
                         Class ->
                             case __T of
@@ -421,9 +417,7 @@
                                                     "{ "++(??Class)++" , "
                                                     ++(??Term)++" , [...] }"},
                                                    {unexpected_exception,
-                                                    {__C, __T,
-                                                     erlang:get_stacktrace()
-                                                    }}]});
+                                                    {__C, __T, __S}}]});
                                 _ -> ok
                             end;
                         _ -> ok
diff --git a/lib/stdlib/src/Makefile b/lib/stdlib/src/Makefile
index bf836203ec..8b156929d7 100644
--- a/lib/stdlib/src/Makefile
+++ b/lib/stdlib/src/Makefile
@@ -121,6 +121,7 @@ MODULES= \
 	timer \
 	unicode \
 	unicode_util \
+	uri_string \
 	win32reg \
 	zip
 
diff --git a/lib/stdlib/src/base64.erl b/lib/stdlib/src/base64.erl
index 5885745fb1..6ea4147abf 100644
--- a/lib/stdlib/src/base64.erl
+++ b/lib/stdlib/src/base64.erl
@@ -24,22 +24,11 @@
 -export([encode/1, decode/1, mime_decode/1,
 	 encode_to_string/1, decode_to_string/1, mime_decode_to_string/1]).
 
-%%-------------------------------------------------------------------------
 %% The following type is a subtype of string() for return values
 %% of (some) functions of this module.
-%%-------------------------------------------------------------------------
-
 -type ascii_string() :: [1..255].
 -type ascii_binary() :: binary().
 
-%%-------------------------------------------------------------------------
-%% encode_to_string(ASCII) -> Base64String
-%%	ASCII - string() | binary()
-%%	Base64String - string()
-%%                                   
-%% Description: Encodes a plain ASCII string (or binary) into base64.
-%%-------------------------------------------------------------------------
-
 -spec encode_to_string(Data) -> Base64String when
       Data :: ascii_string() | ascii_binary(),
       Base64String :: ascii_string().
@@ -47,107 +36,89 @@
 encode_to_string(Bin) when is_binary(Bin) ->
     encode_to_string(binary_to_list(Bin));
 encode_to_string(List) when is_list(List) ->
-    encode_l(List).
-
-%%-------------------------------------------------------------------------
-%% encode(ASCII) -> Base64
-%%	ASCII - string() | binary()
-%%	Base64 - binary()
-%%                                   
-%% Description: Encodes a plain ASCII string (or binary) into base64.
-%%-------------------------------------------------------------------------
+    encode_list_to_string(List).
 
 -spec encode(Data) -> Base64 when
       Data :: ascii_string() | ascii_binary(),
       Base64 :: ascii_binary().
 
 encode(Bin) when is_binary(Bin) ->
-    encode_binary(Bin);
+    encode_binary(Bin, <<>>);
 encode(List) when is_list(List) ->
-    list_to_binary(encode_l(List)).
+    encode_list(List, <<>>).
 
--spec encode_l(ascii_string()) -> ascii_string().
-
-encode_l([]) ->
+encode_list_to_string([]) ->
     [];
-encode_l([A]) ->
-    [b64e(A bsr 2),
-     b64e((A band 3) bsl 4), $=, $=];
-encode_l([A,B]) ->
-    [b64e(A bsr 2),
-     b64e(((A band 3) bsl 4) bor (B bsr 4)), 
-     b64e((B band 15) bsl 2), $=];
-encode_l([A,B,C|Ls]) ->
-    BB = (A bsl 16) bor (B bsl 8) bor C,
+encode_list_to_string([B1]) ->
+    [b64e(B1 bsr 2),
+     b64e((B1 band 3) bsl 4), $=, $=];
+encode_list_to_string([B1,B2]) ->
+    [b64e(B1 bsr 2),
+     b64e(((B1 band 3) bsl 4) bor (B2 bsr 4)),
+     b64e((B2 band 15) bsl 2), $=];
+encode_list_to_string([B1,B2,B3|Ls]) ->
+    BB = (B1 bsl 16) bor (B2 bsl 8) bor B3,
     [b64e(BB bsr 18),
      b64e((BB bsr 12) band 63), 
      b64e((BB bsr 6) band 63),
-     b64e(BB band 63) | encode_l(Ls)].
-
-encode_binary(Bin) ->
-    Split = 3*(byte_size(Bin) div 3),
-    <<Main0:Split/binary,Rest/binary>> = Bin,
-    Main = << <<(b64e(C)):8>> || <<C:6>> <= Main0 >>,
-    case Rest of
-	<<A:6,B:6,C:4>> ->
-	    <<Main/binary,(b64e(A)):8,(b64e(B)):8,(b64e(C bsl 2)):8,$=:8>>;
-	<<A:6,B:2>> ->
-	    <<Main/binary,(b64e(A)):8,(b64e(B bsl 4)):8,$=:8,$=:8>>;
-	<<>> ->
-	    Main
-    end.
+     b64e(BB band 63) | encode_list_to_string(Ls)].
 
-%%-------------------------------------------------------------------------
-%% mime_decode(Base64) -> ASCII
-%% decode(Base64) -> ASCII
-%%	Base64 - string() | binary()
-%%	ASCII - binary()
-%%                                    
-%% Description: Decodes an base64 encoded string to plain ASCII.
-%% mime_decode strips away all characters not Base64 before converting,
-%% whereas decode crashes if an illegal character is found
-%%-------------------------------------------------------------------------
+encode_binary(<<>>, A) ->
+    A;
+encode_binary(<<B1:8>>, A) ->
+    <<A/bits,(b64e(B1 bsr 2)):8,(b64e((B1 band 3) bsl 4)):8,$=:8,$=:8>>;
+encode_binary(<<B1:8, B2:8>>, A) ->
+    <<A/bits,(b64e(B1 bsr 2)):8,
+      (b64e(((B1 band 3) bsl 4) bor (B2 bsr 4))):8,
+      (b64e((B2 band 15) bsl 2)):8, $=:8>>;
+encode_binary(<<B1:8, B2:8, B3:8, Ls/bits>>, A) ->
+    BB = (B1 bsl 16) bor (B2 bsl 8) bor B3,
+    encode_binary(Ls,
+                  <<A/bits,(b64e(BB bsr 18)):8,
+                    (b64e((BB bsr 12) band 63)):8,
+                    (b64e((BB bsr 6) band 63)):8,
+                    (b64e(BB band 63)):8>>).
+
+encode_list([], A) ->
+    A;
+encode_list([B1], A) ->
+    <<A/bits,(b64e(B1 bsr 2)):8,(b64e((B1 band 3) bsl 4)):8,$=:8,$=:8>>;
+encode_list([B1,B2], A) ->
+    <<A/bits,(b64e(B1 bsr 2)):8,
+      (b64e(((B1 band 3) bsl 4) bor (B2 bsr 4))):8,
+      (b64e((B2 band 15) bsl 2)):8, $=:8>>;
+encode_list([B1,B2,B3|Ls], A) ->
+    BB = (B1 bsl 16) bor (B2 bsl 8) bor B3,
+    encode_list(Ls,
+                <<A/bits,(b64e(BB bsr 18)):8,
+                  (b64e((BB bsr 12) band 63)):8,
+                  (b64e((BB bsr 6) band 63)):8,
+                  (b64e(BB band 63)):8>>).
+
+%% mime_decode strips away all characters not Base64 before
+%% converting, whereas decode crashes if an illegal character is found
 
 -spec decode(Base64) -> Data when
       Base64 :: ascii_string() | ascii_binary(),
       Data :: ascii_binary().
 
 decode(Bin) when is_binary(Bin) ->
-    decode_binary(<<>>, Bin);
+    decode_binary(Bin, <<>>);
 decode(List) when is_list(List) ->
-    list_to_binary(decode_l(List)).
+    decode_list(List, <<>>).
 
 -spec mime_decode(Base64) -> Data when
       Base64 :: ascii_string() | ascii_binary(),
       Data :: ascii_binary().
 
 mime_decode(Bin) when is_binary(Bin) ->
-    mime_decode_binary(<<>>, Bin);
+    mime_decode_binary(Bin, <<>>);
 mime_decode(List) when is_list(List) ->
-    mime_decode(list_to_binary(List)).
-
--spec decode_l(ascii_string()) -> ascii_string().
-
-decode_l(List) ->
-    L = strip_spaces(List, []),
-    decode(L, []).
-
--spec mime_decode_l(ascii_string()) -> ascii_string().
+    mime_decode_list(List, <<>>).
 
-mime_decode_l(List) ->
-    L = strip_illegal(List, [], 0),
-    decode(L, []).
-
-%%-------------------------------------------------------------------------
-%% mime_decode_to_string(Base64) -> ASCII
-%% decode_to_string(Base64) -> ASCII
-%%	Base64 - string() | binary()
-%%	ASCII - binary()
-%%
-%% Description: Decodes an base64 encoded string to plain ASCII.
-%% mime_decode strips away all characters not Base64 before converting,
-%% whereas decode crashes if an illegal character is found
-%%-------------------------------------------------------------------------
+%% mime_decode_to_string strips away all characters not Base64 before
+%% converting, whereas decode_to_string crashes if an illegal
+%% character is found
 
 -spec decode_to_string(Base64) -> DataString when
       Base64 :: ascii_string() | ascii_binary(),
@@ -156,7 +127,7 @@ mime_decode_l(List) ->
 decode_to_string(Bin) when is_binary(Bin) ->
     decode_to_string(binary_to_list(Bin));
 decode_to_string(List) when is_list(List) ->
-    decode_l(List).
+    decode_list_to_string(List).
 
 -spec mime_decode_to_string(Base64) -> DataString when
       Base64 :: ascii_string() | ascii_binary(),
@@ -165,202 +136,326 @@ decode_to_string(List) when is_list(List) ->
 mime_decode_to_string(Bin) when is_binary(Bin) ->
     mime_decode_to_string(binary_to_list(Bin));
 mime_decode_to_string(List) when is_list(List) ->
-    mime_decode_l(List).
-
-%% One-based decode map.
--define(DECODE_MAP,
-	{bad,bad,bad,bad,bad,bad,bad,bad,ws,ws,bad,bad,ws,bad,bad, %1-15
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad, %16-31
-	 ws,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,62,bad,bad,bad,63, %32-47
-	 52,53,54,55,56,57,58,59,60,61,bad,bad,bad,eq,bad,bad, %48-63
-	 bad,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,
-	 15,16,17,18,19,20,21,22,23,24,25,bad,bad,bad,bad,bad,
-	 bad,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
-	 41,42,43,44,45,46,47,48,49,50,51,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
-	 bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad}).
-
-decode_binary(Result0, <<C:8,T0/bits>>) ->
-    case element(C, ?DECODE_MAP) of
-	bad ->
-	    erlang:error({badarg,C});
-	ws ->
-	    decode_binary(Result0, T0);
-	eq ->
-	    case strip_ws(T0) of
-		<<$=:8,T/binary>> ->
-		    <<>> = strip_ws(T),
-		    Split = byte_size(Result0) - 1,
-		    <<Result:Split/bytes,_:4>> = Result0,
-		    Result;
-		T ->
-		    <<>> = strip_ws(T),
-		    Split = byte_size(Result0) - 1,
-		    <<Result:Split/bytes,_:2>> = Result0,
-		    Result
-	    end;
-	Bits ->
-	    decode_binary(<<Result0/bits,Bits:6>>, T0)
-    end;
-decode_binary(Result, <<>>) ->
-    true = is_binary(Result),
-    Result.
+    mime_decode_list_to_string(List).
 
 %% Skipping pad character if not at end of string. Also liberal about
 %% excess padding and skipping of other illegal (non-base64 alphabet)
 %% characters. See section 3.3 of RFC4648
-mime_decode_binary(Result, <<0:8,T/bits>>) ->
-    mime_decode_binary(Result, T);
-mime_decode_binary(Result0, <<C:8,T/bits>>) ->
-    case element(C, ?DECODE_MAP) of
-        Bits when is_integer(Bits) ->
-            mime_decode_binary(<<Result0/bits,Bits:6>>, T);
+mime_decode_list([0 | Cs], A) ->
+    mime_decode_list(Cs, A);
+mime_decode_list([C1 | Cs], A) ->
+    case b64d(C1) of
+        B1 when is_integer(B1) -> mime_decode_list(Cs, A, B1);
+        _ -> mime_decode_list(Cs, A)  % eq is padding
+    end;
+mime_decode_list([], A) ->
+    A.
+
+mime_decode_list([0 | Cs], A, B1) ->
+    mime_decode_list(Cs, A, B1);
+mime_decode_list([C2 | Cs], A, B1) ->
+    case b64d(C2) of
+        B2 when is_integer(B2) ->
+            mime_decode_list(Cs, A, B1, B2);
+        _ -> mime_decode_list(Cs, A, B1) % eq is padding
+    end.
+
+mime_decode_list([0 | Cs], A, B1, B2) ->
+    mime_decode_list(Cs, A, B1, B2);
+mime_decode_list([C3 | Cs], A, B1, B2) ->
+    case b64d(C3) of
+        B3 when is_integer(B3) ->
+            mime_decode_list(Cs, A, B1, B2, B3);
+        eq=B3 ->
+            mime_decode_list_after_eq(Cs, A, B1, B2, B3);
+        _ -> mime_decode_list(Cs, A, B1, B2)
+    end.
+
+mime_decode_list([0 | Cs], A, B1, B2, B3) ->
+    mime_decode_list(Cs, A, B1, B2, B3);
+mime_decode_list([C4 | Cs], A, B1, B2, B3) ->
+    case b64d(C4) of
+        B4 when is_integer(B4) ->
+            mime_decode_list(Cs, <<A/bits,B1:6,B2:6,B3:6,B4:6>>);
         eq ->
-            mime_decode_binary_after_eq(Result0, T, false);
-        _ ->
-            mime_decode_binary(Result0, T)
+            mime_decode_list_after_eq(Cs, A, B1, B2, B3);
+        _ -> mime_decode_list(Cs, A, B1, B2, B3)
+    end.
+
+mime_decode_list_after_eq([0 | Cs], A, B1, B2, B3) ->
+    mime_decode_list_after_eq(Cs, A, B1, B2, B3);
+mime_decode_list_after_eq([C | Cs], A, B1, B2, B3) ->
+    case b64d(C) of
+        B when is_integer(B) ->
+            %% More valid data, skip the eq as invalid
+            case B3 of
+                eq -> mime_decode_list(Cs, A, B1, B2, B);
+                _ -> mime_decode_list(Cs, <<A/bits,B1:6,B2:6,B3:6,B:6>>)
+            end;
+        _ -> mime_decode_list_after_eq(Cs, A, B1, B2, B3)
     end;
-mime_decode_binary(Result, _) ->
-    true = is_binary(Result),
-    Result.
-
-mime_decode_binary_after_eq(Result, <<0:8,T/bits>>, Eq) ->
-    mime_decode_binary_after_eq(Result, T, Eq);
-mime_decode_binary_after_eq(Result0, <<C:8,T/bits>>, Eq) ->
-    case element(C, ?DECODE_MAP) of
-        bad ->
-            mime_decode_binary_after_eq(Result0, T, Eq);
-        ws ->
-            mime_decode_binary_after_eq(Result0, T, Eq);
+mime_decode_list_after_eq([], A, B1, B2, eq) ->
+    <<A/bits,B1:6,(B2 bsr 4):2>>;
+mime_decode_list_after_eq([], A, B1, B2, B3) ->
+    <<A/bits,B1:6,B2:6,(B3 bsr 2):4>>.
+
+mime_decode_binary(<<0:8, Cs/bits>>, A) ->
+    mime_decode_binary(Cs, A);
+mime_decode_binary(<<C1:8, Cs/bits>>, A) ->
+    case b64d(C1) of
+        B1 when is_integer(B1) -> mime_decode_binary(Cs, A, B1);
+        _ -> mime_decode_binary(Cs, A)  % eq is padding
+    end;
+mime_decode_binary(<<>>, A) ->
+    A.
+
+mime_decode_binary(<<0:8, Cs/bits>>, A, B1) ->
+    mime_decode_binary(Cs, A, B1);
+mime_decode_binary(<<C2:8, Cs/bits>>, A, B1) ->
+    case b64d(C2) of
+        B2 when is_integer(B2) ->
+            mime_decode_binary(Cs, A, B1, B2);
+        _ -> mime_decode_binary(Cs, A, B1) % eq is padding
+    end.
+
+mime_decode_binary(<<0:8, Cs/bits>>, A, B1, B2) ->
+    mime_decode_binary(Cs, A, B1, B2);
+mime_decode_binary(<<C3:8, Cs/bits>>, A, B1, B2) ->
+    case b64d(C3) of
+        B3 when is_integer(B3) ->
+            mime_decode_binary(Cs, A, B1, B2, B3);
+        eq=B3 ->
+            mime_decode_binary_after_eq(Cs, A, B1, B2, B3);
+        _ -> mime_decode_binary(Cs, A, B1, B2)
+    end.
+
+mime_decode_binary(<<0:8, Cs/bits>>, A, B1, B2, B3) ->
+    mime_decode_binary(Cs, A, B1, B2, B3);
+mime_decode_binary(<<C4:8, Cs/bits>>, A, B1, B2, B3) ->
+    case b64d(C4) of
+        B4 when is_integer(B4) ->
+            mime_decode_binary(Cs, <<A/bits,B1:6,B2:6,B3:6,B4:6>>);
         eq ->
-            mime_decode_binary_after_eq(Result0, T, true);
-        Bits when is_integer(Bits) ->
+            mime_decode_binary_after_eq(Cs, A, B1, B2, B3);
+        _ -> mime_decode_binary(Cs, A, B1, B2, B3)
+    end.
+
+mime_decode_binary_after_eq(<<0:8, Cs/bits>>, A, B1, B2, B3) ->
+    mime_decode_binary_after_eq(Cs, A, B1, B2, B3);
+mime_decode_binary_after_eq(<<C:8, Cs/bits>>, A, B1, B2, B3) ->
+    case b64d(C) of
+        B when is_integer(B) ->
             %% More valid data, skip the eq as invalid
-            mime_decode_binary(<<Result0/bits,Bits:6>>, T)
+            case B3 of
+                eq -> mime_decode_binary(Cs, A, B1, B2, B);
+                _ -> mime_decode_binary(Cs, <<A/bits,B1:6,B2:6,B3:6,B:6>>)
+            end;
+        _ -> mime_decode_binary_after_eq(Cs, A, B1, B2, B3)
+    end;
+mime_decode_binary_after_eq(<<>>, A, B1, B2, eq) ->
+    <<A/bits,B1:6,(B2 bsr 4):2>>;
+mime_decode_binary_after_eq(<<>>, A, B1, B2, B3) ->
+    <<A/bits,B1:6,B2:6,(B3 bsr 2):4>>.
+
+mime_decode_list_to_string([0 | Cs]) ->
+    mime_decode_list_to_string(Cs);
+mime_decode_list_to_string([C1 | Cs]) ->
+    case b64d(C1) of
+        B1 when is_integer(B1) -> mime_decode_list_to_string(Cs, B1);
+        _ -> mime_decode_list_to_string(Cs) % eq is padding
     end;
-mime_decode_binary_after_eq(Result0, <<>>, Eq) ->
-    %% No more valid data.
-    case bit_size(Result0) rem 8 of
-        0 ->
-            %% '====' is not uncommon.
-            Result0;
-        4 when Eq ->
-            %% enforce at least one more '=' only ignoring illegals and spacing
-            Split = byte_size(Result0) - 1,
-            <<Result:Split/bytes,_:4>> = Result0,
-            Result;
-        2 ->
-            %% remove 2 bits
-            Split = byte_size(Result0) - 1,
-            <<Result:Split/bytes,_:2>> = Result0,
-            Result
+mime_decode_list_to_string([]) ->
+    [].
+
+mime_decode_list_to_string([0 | Cs], B1) ->
+    mime_decode_list_to_string(Cs, B1);
+mime_decode_list_to_string([C2 | Cs], B1) ->
+    case b64d(C2) of
+        B2 when is_integer(B2) ->
+            mime_decode_list_to_string(Cs, B1, B2);
+        _ -> mime_decode_list_to_string(Cs, B1) % eq is padding
     end.
 
-decode([], A) -> A;
-decode([$=,$=,C2,C1|Cs], A) ->
-    Bits2x6 = (b64d(C1) bsl 18) bor (b64d(C2) bsl 12),
-    Octet1 = Bits2x6 bsr 16,
-    decode(Cs, [Octet1|A]);
-decode([$=,C3,C2,C1|Cs], A) ->
-    Bits3x6 = (b64d(C1) bsl 18) bor (b64d(C2) bsl 12)
-	bor (b64d(C3) bsl 6),
-    Octet1 = Bits3x6 bsr 16,
-    Octet2 = (Bits3x6 bsr 8) band 16#ff,
-    decode(Cs, [Octet1,Octet2|A]);
-decode([C4,C3,C2,C1| Cs], A) ->
-    Bits4x6 = (b64d(C1) bsl 18) bor (b64d(C2) bsl 12)
-	bor (b64d(C3) bsl 6) bor b64d(C4),
-    Octet1 = Bits4x6 bsr 16,
-    Octet2 = (Bits4x6 bsr 8) band 16#ff,
-    Octet3 = Bits4x6 band 16#ff,
-    decode(Cs, [Octet1,Octet2,Octet3|A]).
+mime_decode_list_to_string([0 | Cs], B1, B2) ->
+    mime_decode_list_to_string(Cs, B1, B2);
+mime_decode_list_to_string([C3 | Cs], B1, B2) ->
+    case b64d(C3) of
+        B3 when is_integer(B3) ->
+            mime_decode_list_to_string(Cs, B1, B2, B3);
+        eq=B3 -> mime_decode_list_to_string_after_eq(Cs, B1, B2, B3);
+        _ -> mime_decode_list_to_string(Cs, B1, B2)
+    end.
 
-%%%========================================================================
-%%% Internal functions
-%%%========================================================================
+mime_decode_list_to_string([0 | Cs], B1, B2, B3) ->
+    mime_decode_list_to_string(Cs, B1, B2, B3);
+mime_decode_list_to_string([C4 | Cs], B1, B2, B3) ->
+    case b64d(C4) of
+        B4 when is_integer(B4) ->
+            Bits4x6 = (B1 bsl 18) bor (B2 bsl 12) bor (B3 bsl 6) bor B4,
+            Octet1 = Bits4x6 bsr 16,
+            Octet2 = (Bits4x6 bsr 8) band 16#ff,
+            Octet3 = Bits4x6 band 16#ff,
+            [Octet1, Octet2, Octet3 | mime_decode_list_to_string(Cs)];
+        eq ->
+            mime_decode_list_to_string_after_eq(Cs, B1, B2, B3);
+        _ -> mime_decode_list_to_string(Cs, B1, B2, B3)
+    end.
 
-strip_spaces([], A) -> A;
-strip_spaces([$\s|Cs], A) -> strip_spaces(Cs, A);
-strip_spaces([$\t|Cs], A) -> strip_spaces(Cs, A);
-strip_spaces([$\r|Cs], A) -> strip_spaces(Cs, A);
-strip_spaces([$\n|Cs], A) -> strip_spaces(Cs, A);
-strip_spaces([C|Cs], A) -> strip_spaces(Cs, [C | A]).
-
-strip_ws(<<$\t,T/binary>>) ->
-    strip_ws(T);
-strip_ws(<<$\n,T/binary>>) ->
-    strip_ws(T);
-strip_ws(<<$\r,T/binary>>) ->
-    strip_ws(T);
-strip_ws(<<$\s,T/binary>>) ->
-    strip_ws(T);
-strip_ws(T) -> T.
+mime_decode_list_to_string_after_eq([0 | Cs], B1, B2, B3) ->
+    mime_decode_list_to_string_after_eq(Cs, B1, B2, B3);
+mime_decode_list_to_string_after_eq([C | Cs], B1, B2, B3) ->
+    case b64d(C) of
+        B when is_integer(B) ->
+            %% More valid data, skip the eq as invalid
+            case B3 of
+                eq -> mime_decode_list_to_string(Cs, B1, B2, B);
+                _ ->
+                    Bits4x6 = (B1 bsl 18) bor (B2 bsl 12) bor (B3 bsl 6) bor B,
+                    Octet1 = Bits4x6 bsr 16,
+                    Octet2 = (Bits4x6 bsr 8) band 16#ff,
+                    Octet3 = Bits4x6 band 16#ff,
+                    [Octet1, Octet2, Octet3 | mime_decode_list_to_string(Cs)]
+            end;
+        _ -> mime_decode_list_to_string_after_eq(Cs, B1, B2, B3)
+    end;
+mime_decode_list_to_string_after_eq([], B1, B2, eq) ->
+    binary_to_list(<<B1:6,(B2 bsr 4):2>>);
+mime_decode_list_to_string_after_eq([], B1, B2, B3) ->
+    binary_to_list(<<B1:6,B2:6,(B3 bsr 2):4>>).
+
+decode_list([C1 | Cs], A) ->
+    case b64d(C1) of
+        ws -> decode_list(Cs, A);
+        B1 -> decode_list(Cs, A, B1)
+    end;
+decode_list([], A) ->
+    A.
 
-%% Skipping pad character if not at end of string. Also liberal about
-%% excess padding and skipping of other illegal (non-base64 alphabet)
-%% characters. See section 3.3 of RFC4648
-strip_illegal([], A, _Cnt) ->
+decode_list([C2 | Cs], A, B1) ->
+    case b64d(C2) of
+        ws -> decode_list(Cs, A, B1);
+        B2 -> decode_list(Cs, A, B1, B2)
+    end.
+
+decode_list([C3 | Cs], A, B1, B2) ->
+    case b64d(C3) of
+        ws -> decode_list(Cs, A, B1, B2);
+        B3 -> decode_list(Cs, A, B1, B2, B3)
+    end.
+
+decode_list([C4 | Cs], A, B1, B2, B3) ->
+    case b64d(C4) of
+        ws                -> decode_list(Cs, A, B1, B2, B3);
+        eq when B3 =:= eq -> only_ws(Cs, <<A/bits,B1:6,(B2 bsr 4):2>>);
+        eq                -> only_ws(Cs, <<A/bits,B1:6,B2:6,(B3 bsr 2):4>>);
+        B4                -> decode_list(Cs, <<A/bits,B1:6,B2:6,B3:6,B4:6>>)
+    end.
+
+decode_binary(<<C1:8, Cs/bits>>, A) ->
+    case b64d(C1) of
+        ws -> decode_binary(Cs, A);
+        B1 -> decode_binary(Cs, A, B1)
+    end;
+decode_binary(<<>>, A) ->
+    A.
+
+decode_binary(<<C2:8, Cs/bits>>, A, B1) ->
+    case b64d(C2) of
+        ws -> decode_binary(Cs, A, B1);
+        B2 -> decode_binary(Cs, A, B1, B2)
+    end.
+
+decode_binary(<<C3:8, Cs/bits>>, A, B1, B2) ->
+    case b64d(C3) of
+        ws -> decode_binary(Cs, A, B1, B2);
+        B3 -> decode_binary(Cs, A, B1, B2, B3)
+    end.
+
+decode_binary(<<C4:8, Cs/bits>>, A, B1, B2, B3) ->
+    case b64d(C4) of
+        ws                -> decode_binary(Cs, A, B1, B2, B3);
+        eq when B3 =:= eq -> only_ws_binary(Cs, <<A/bits,B1:6,(B2 bsr 4):2>>);
+        eq                -> only_ws_binary(Cs, <<A/bits,B1:6,B2:6,(B3 bsr 2):4>>);
+        B4                -> decode_binary(Cs, <<A/bits,B1:6,B2:6,B3:6,B4:6>>)
+    end.
+
+only_ws_binary(<<>>, A) ->
     A;
-strip_illegal([0|Cs], A, Cnt) ->
-    strip_illegal(Cs, A, Cnt);
-strip_illegal([C|Cs], A, Cnt) ->
-    case element(C, ?DECODE_MAP) of
-	bad ->
-	    strip_illegal(Cs, A, Cnt);
-	ws ->
-	    strip_illegal(Cs, A, Cnt);
-	eq ->
-	    case {tail_contains_more(Cs, false), Cnt rem 4} of
-		{{[], _}, 0} ->
-		    A;            %% Ignore extra =
-		{{[], true}, 2} ->
-		    [$=|[$=|A]];  %% 'XX=='
-		{{[], _}, 3} ->
-		    [$=|A];       %% 'XXX='
-		{{[H|T], _}, _} ->
-		    %% more data, skip equals
-		    strip_illegal(T, [H|A], Cnt+1)
-	    end;
-	_ ->
-	    strip_illegal(Cs, [C|A], Cnt+1)
+only_ws_binary(<<C:8, Cs/bits>>, A) ->
+    case b64d(C) of
+        ws -> only_ws_binary(Cs, A)
     end.
 
-%% Search the tail for more valid data and remember if we saw
-%% another equals along the way.
-tail_contains_more([], Eq) ->
-    {[], Eq};
-tail_contains_more(<<>>, Eq) ->
-    {<<>>, Eq};
-tail_contains_more([C|T]=More, Eq) ->
-    case element(C, ?DECODE_MAP) of
-	bad ->
-	    tail_contains_more(T, Eq);
-	ws ->
-	    tail_contains_more(T, Eq);
-	eq ->
-	    tail_contains_more(T, true);
-	_ ->
-	    {More, Eq}
+decode_list_to_string([C1 | Cs]) ->
+    case b64d(C1) of
+        ws -> decode_list_to_string(Cs);
+        B1 -> decode_list_to_string(Cs, B1)
     end;
-tail_contains_more(<<C:8,T/bits>> =More, Eq) ->
-    case element(C, ?DECODE_MAP) of
-	bad ->
-	    tail_contains_more(T, Eq);
-	ws ->
-	    tail_contains_more(T, Eq);
-	eq ->
-	    tail_contains_more(T, true);
-	_ ->
-	    {More, Eq}
+decode_list_to_string([]) ->
+    [].
+
+decode_list_to_string([C2 | Cs], B1) ->
+    case b64d(C2) of
+        ws -> decode_list_to_string(Cs, B1);
+        B2 -> decode_list_to_string(Cs, B1, B2)
     end.
-    
+
+decode_list_to_string([C3 | Cs], B1, B2) ->
+    case b64d(C3) of
+        ws -> decode_list_to_string(Cs, B1, B2);
+        B3 -> decode_list_to_string(Cs, B1, B2, B3)
+    end.
+
+decode_list_to_string([C4 | Cs], B1, B2, B3) ->
+    case b64d(C4) of
+        ws ->
+            decode_list_to_string(Cs, B1, B2, B3);
+        eq when B3 =:= eq ->
+            only_ws(Cs, binary_to_list(<<B1:6,(B2 bsr 4):2>>));
+        eq ->
+            only_ws(Cs, binary_to_list(<<B1:6,B2:6,(B3 bsr 2):4>>));
+        B4 ->
+            Bits4x6 = (B1 bsl 18) bor (B2 bsl 12) bor (B3 bsl 6) bor B4,
+            Octet1 = Bits4x6 bsr 16,
+            Octet2 = (Bits4x6 bsr 8) band 16#ff,
+            Octet3 = Bits4x6 band 16#ff,
+            [Octet1, Octet2, Octet3 | decode_list_to_string(Cs)]
+    end.
+
+only_ws([], A) ->
+    A;
+only_ws([C | Cs], A) ->
+    case b64d(C) of
+        ws -> only_ws(Cs, A)
+    end.
+
+%%%========================================================================
+%%% Internal functions
+%%%========================================================================
+
 %% accessors 
+-compile({inline, [{b64d, 1}]}).
+%% One-based decode map.
+b64d(X) ->
+    element(X,
+            {bad,bad,bad,bad,bad,bad,bad,bad,ws,ws,bad,bad,ws,bad,bad, %1-15
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad, %16-31
+             ws,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,62,bad,bad,bad,63, %32-47
+             52,53,54,55,56,57,58,59,60,61,bad,bad,bad,eq,bad,bad, %48-63
+             bad,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,
+             15,16,17,18,19,20,21,22,23,24,25,bad,bad,bad,bad,bad,
+             bad,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
+             41,42,43,44,45,46,47,48,49,50,51,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,
+             bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad,bad}).
+
+-compile({inline, [{b64e, 1}]}).
 b64e(X) ->
     element(X+1,
 	    {$A, $B, $C, $D, $E, $F, $G, $H, $I, $J, $K, $L, $M, $N,
@@ -368,9 +463,3 @@ b64e(X) ->
 	     $a, $b, $c, $d, $e, $f, $g, $h, $i, $j, $k, $l, $m, $n,
 	     $o, $p, $q, $r, $s, $t, $u, $v, $w, $x, $y, $z,
 	     $0, $1, $2, $3, $4, $5, $6, $7, $8, $9, $+, $/}).
-
-
-b64d(X) ->
-    b64d_ok(element(X, ?DECODE_MAP)).
-
-b64d_ok(I) when is_integer(I) -> I.
diff --git a/lib/stdlib/src/beam_lib.erl b/lib/stdlib/src/beam_lib.erl
index 06c15fceda..24349c74e8 100644
--- a/lib/stdlib/src/beam_lib.erl
+++ b/lib/stdlib/src/beam_lib.erl
@@ -148,7 +148,8 @@ chunks(File, Chunks, Options) ->
     try read_chunk_data(File, Chunks, Options)
     catch Error -> Error end.
 
--spec all_chunks(beam()) -> {'ok', 'beam_lib', [{chunkid(), dataB()}]}.
+-spec all_chunks(beam()) ->
+           {'ok', 'beam_lib', [{chunkid(), dataB()}]} | {'error', 'beam_lib', info_rsn()}.
 
 all_chunks(File) ->
     read_all_chunks(File).
diff --git a/lib/stdlib/src/binary.erl b/lib/stdlib/src/binary.erl
index 6a64133b45..7d0e42489e 100644
--- a/lib/stdlib/src/binary.erl
+++ b/lib/stdlib/src/binary.erl
@@ -47,23 +47,39 @@ at(_, _) ->
 -spec bin_to_list(Subject) -> [byte()] when
       Subject :: binary().
 
-bin_to_list(_) ->
-    erlang:nif_error(undef).
+bin_to_list(Subject) ->
+    binary_to_list(Subject).
 
 -spec bin_to_list(Subject, PosLen) -> [byte()] when
       Subject :: binary(),
       PosLen :: part().
 
-bin_to_list(_, _) ->
-    erlang:nif_error(undef).
+bin_to_list(Subject, {Pos, Len}) ->
+    bin_to_list(Subject, Pos, Len);
+bin_to_list(_Subject, _BadArg) ->
+    erlang:error(badarg).
 
 -spec bin_to_list(Subject, Pos, Len) -> [byte()] when
       Subject :: binary(),
       Pos :: non_neg_integer(),
       Len :: integer().
 
-bin_to_list(_, _, _) ->
-    erlang:nif_error(undef).
+bin_to_list(Subject, Pos, Len) when not is_binary(Subject);
+                                    not is_integer(Pos);
+                                    not is_integer(Len) ->
+    %% binary_to_list/3 allows bitstrings as long as the slice fits, and we
+    %% want to badarg when Pos/Len aren't integers instead of raising badarith
+    %% when adjusting args for binary_to_list/3.
+    erlang:error(badarg);
+bin_to_list(Subject, Pos, 0) when Pos >= 0, Pos =< byte_size(Subject) ->
+    %% binary_to_list/3 doesn't handle this case.
+    [];
+bin_to_list(_Subject, _Pos, 0) ->
+    erlang:error(badarg);
+bin_to_list(Subject, Pos, Len) when Len < 0 ->
+    bin_to_list(Subject, Pos + Len, -Len);
+bin_to_list(Subject, Pos, Len) when Len > 0 ->
+    binary_to_list(Subject, Pos + 1, Pos + Len).
 
 -spec compile_pattern(Pattern) -> cp() when
       Pattern :: binary() | [binary()].
diff --git a/lib/stdlib/src/c.erl b/lib/stdlib/src/c.erl
index 9a447af5b7..13f78841aa 100644
--- a/lib/stdlib/src/c.erl
+++ b/lib/stdlib/src/c.erl
@@ -564,7 +564,7 @@ display_info(Pid) ->
 			   Other
 		   end,
 	    Reds = fetch(reductions, Info),
-	    LM = length(fetch(messages, Info)),
+	    LM = fetch(message_queue_len, Info),
 	    HS = fetch(heap_size, Info),
 	    SS = fetch(stack_size, Info),
 	    iformat(w(Pid), mfa_string(Call),
@@ -886,7 +886,7 @@ portinfo(Id) ->
 procline(Name, Info, Pid) ->
     Call = initial_call(Info),
     Reds  = fetch(reductions, Info),
-    LM = length(fetch(messages, Info)),
+    LM = fetch(message_queue_len, Info),
     procformat(io_lib:format("~tw",[Name]),
 	       io_lib:format("~w",[Pid]),
 	       io_lib:format("~ts",[mfa_string(Call)]),
@@ -1034,8 +1034,8 @@ appcall(App, M, F, Args) ->
     try
 	apply(M, F, Args)
     catch
-	error:undef ->
-	    case erlang:get_stacktrace() of
+	error:undef:S ->
+	    case S of
 		[{M,F,Args,_}|_] ->
 		    Arity = length(Args),
 		    io:format("Call to ~w:~w/~w in application ~w failed.\n",
diff --git a/lib/stdlib/src/dets.erl b/lib/stdlib/src/dets.erl
index 4e3fe0e5c1..e1a36abc70 100644
--- a/lib/stdlib/src/dets.erl
+++ b/lib/stdlib/src/dets.erl
@@ -1288,8 +1288,8 @@ init(Parent, Server) ->
             catch
                 exit:normal ->
                     exit(normal);
-                _:Bad ->
-                    bug_found(no_name, Op, Bad, From),
+                _:Bad:Stacktrace ->
+                    bug_found(no_name, Op, Bad, Stacktrace, From),
                     exit(Bad) % give up
             end
     end.
@@ -1371,8 +1371,8 @@ do_apply_op(Op, From, Head, N) ->
     catch 
         exit:normal -> 
             exit(normal);
-        _:Bad -> 
-            bug_found(Head#head.name, Op, Bad, From),
+        _:Bad:Stacktrace -> 
+            bug_found(Head#head.name, Op, Bad, Stacktrace, From),
             open_file_loop(Head, N)
     end.
 
@@ -1581,7 +1581,7 @@ apply_op(Op, From, Head, N) ->
 	    ok
     end.
 
-bug_found(Name, Op, Bad, From) ->
+bug_found(Name, Op, Bad, Stacktrace, From) ->
     case dets_utils:debug_mode() of
         true ->
             %% If stream_op/5 found more requests, this is not
@@ -1590,7 +1590,7 @@ bug_found(Name, Op, Bad, From) ->
               ("** dets: Bug was found when accessing table ~tw,~n"
                "** dets: operation was ~tp and reply was ~tw.~n"
                "** dets: Stacktrace: ~tw~n",
-               [Name, Op, Bad, erlang:get_stacktrace()]);
+               [Name, Op, Bad, Stacktrace]);
         false ->
             error_logger:format
               ("** dets: Bug was found when accessing table ~tw~n",
diff --git a/lib/stdlib/src/dets_utils.erl b/lib/stdlib/src/dets_utils.erl
index 17f55ebdc2..4c8ea9e82b 100644
--- a/lib/stdlib/src/dets_utils.erl
+++ b/lib/stdlib/src/dets_utils.erl
@@ -377,7 +377,8 @@ corrupt_reason(Head, Reason0) ->
                  no_disk_map -> 
                      Reason0;
                  DM ->
-                    ST = erlang:get_stacktrace(),
+                    {current_stacktrace, ST} =
+                         erlang:process_info(self(), current_stacktrace),
                     PD = get(),
                     {Reason0, ST, PD, DM}
              end,
diff --git a/lib/stdlib/src/epp.erl b/lib/stdlib/src/epp.erl
index 00e6a10d8a..77cc88eb08 100644
--- a/lib/stdlib/src/epp.erl
+++ b/lib/stdlib/src/epp.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -1197,21 +1197,21 @@ skip_else(_Else, From, St, Sis) ->
 %% macro_expansion(Tokens, Anno)
 %%  Extract the macro parameters and the expansion from a macro definition.
 
-macro_pars([{')',_Lp}, {',',Ld}|Ex], Args) ->
-    {ok, {lists:reverse(Args), macro_expansion(Ex, Ld)}};
-macro_pars([{var,_,Name}, {')',_Lp}, {',',Ld}|Ex], Args) ->
+macro_pars([{')',_Lp}, {',',_Ld}=Comma|Ex], Args) ->
+    {ok, {lists:reverse(Args), macro_expansion(Ex, Comma)}};
+macro_pars([{var,_,Name}, {')',_Lp}, {',',_Ld}=Comma|Ex], Args) ->
     false = lists:member(Name, Args),		%Prolog is nice
-    {ok, {lists:reverse([Name|Args]), macro_expansion(Ex, Ld)}};
+    {ok, {lists:reverse([Name|Args]), macro_expansion(Ex, Comma)}};
 macro_pars([{var,_L,Name}, {',',_}|Ts], Args) ->
     false = lists:member(Name, Args),
     macro_pars(Ts, [Name|Args]).
 
-macro_expansion([{')',_Lp},{dot,_Ld}], _Anno0) -> [];
-macro_expansion([{dot,_}=Dot], _Anno0) ->
+macro_expansion([{')',_Lp},{dot,_Ld}], _T0) -> [];
+macro_expansion([{dot,_}=Dot], _T0) ->
     throw({error,loc(Dot),missing_parenthesis});
-macro_expansion([T|Ts], _Anno0) ->
+macro_expansion([T|Ts], _T0) ->
     [T|macro_expansion(Ts, T)];
-macro_expansion([], Anno0) -> throw({error,loc(Anno0),premature_end}).
+macro_expansion([], T0) -> throw({error,loc(T0),premature_end}).
 
 %% expand_macros(Tokens, St)
 %% expand_macro(Tokens, MacroToken, RestTokens)
diff --git a/lib/stdlib/src/erl_compile.erl b/lib/stdlib/src/erl_compile.erl
index 18d7548fdc..f781312ca2 100644
--- a/lib/stdlib/src/erl_compile.erl
+++ b/lib/stdlib/src/erl_compile.erl
@@ -188,6 +188,8 @@ parse_dep_option("", T) ->
     {[makedep,{makedep_output,standard_io}],T};
 parse_dep_option("D", T) ->
     {[makedep],T};
+parse_dep_option("MD", T) ->
+    {[makedep_side_effect],T};
 parse_dep_option("F"++Opt, T0) ->
     {File,T} = get_option("MF", Opt, T0),
     {[makedep,{makedep_output,File}],T};
@@ -221,6 +223,7 @@ usage() ->
 	  "the dependencies"},
 	 {"-MP","add a phony target for each dependency"},
 	 {"-MD","same as -M -MT file (with default 'file')"},
+	 {"-MMD","generate dependencies as a side-effect"},
 	 {"-o name","name output directory or file"},
 	 {"-pa path","add path to the front of Erlang's code path"},
 	 {"-pz path","add path to the end of Erlang's code path"},
diff --git a/lib/stdlib/src/erl_eval.erl b/lib/stdlib/src/erl_eval.erl
index eafee346eb..4ee11383da 100644
--- a/lib/stdlib/src/erl_eval.erl
+++ b/lib/stdlib/src/erl_eval.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1996-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -69,6 +69,9 @@
 -type(non_local_function_handler() :: {value, nlfun_handler()}
                                     | none).
 
+-define(STACKTRACE,
+        element(2, erlang:process_info(self(), current_stacktrace))).
+
 %% exprs(ExpressionSeq, Bindings)
 %% exprs(ExpressionSeq, Bindings, LocalFuncHandler)
 %% exprs(ExpressionSeq, Bindings, LocalFuncHandler, ExternalFuncHandler)
@@ -90,7 +93,7 @@ exprs(Exprs, Bs) ->
         ok -> 
             exprs(Exprs, Bs, none, none, none);
         {error,{_Line,_Mod,Error}} ->
-	    erlang:raise(error, Error, [{?MODULE,exprs,2}])
+	    erlang:raise(error, Error, ?STACKTRACE)
     end.
 
 -spec(exprs(Expressions, Bindings, LocalFunctionHandler) ->
@@ -141,7 +144,7 @@ expr(E, Bs) ->
         ok -> 
             expr(E, Bs, none, none, none);
         {error,{_Line,_Mod,Error}} ->
-	    erlang:raise(error, Error, [{?MODULE,expr,2}])
+	    erlang:raise(error, Error, ?STACKTRACE)
     end.
 
 -spec(expr(Expression, Bindings, LocalFunctionHandler) ->
@@ -182,7 +185,7 @@ check_command(Es, Bs) ->
 
 fun_data(F) when is_function(F) ->
     case erlang:fun_info(F, module) of
-        {module,erl_eval} ->
+        {module,?MODULE} ->
             case erlang:fun_info(F, env) of
                 {env,[{FBs,_FLf,_FEf,FCs}]} ->
                     {fun_data,FBs,FCs};
@@ -209,8 +212,8 @@ expr({var,_,V}, Bs, _Lf, _Ef, RBs) ->
     case binding(V, Bs) of
 	{value,Val} ->
             ret_expr(Val, Bs, RBs);
-	unbound -> % Should not happen.
-	    erlang:raise(error, {unbound,V}, stacktrace())
+	unbound -> % Cannot not happen if checked by erl_lint
+	    erlang:raise(error, {unbound,V}, ?STACKTRACE)
     end;
 expr({char,_,C}, Bs, _Lf, _Ef, RBs) ->
     ret_expr(C, Bs, RBs);
@@ -236,13 +239,13 @@ expr({tuple,_,Es}, Bs0, Lf, Ef, RBs) ->
     {Vs,Bs} = expr_list(Es, Bs0, Lf, Ef),
     ret_expr(list_to_tuple(Vs), Bs, RBs);
 expr({record_field,_,_,Name,_}, _Bs, _Lf, _Ef, _RBs) ->
-    erlang:raise(error, {undef_record,Name}, stacktrace());
+    erlang:raise(error, {undef_record,Name}, ?STACKTRACE);
 expr({record_index,_,Name,_}, _Bs, _Lf, _Ef, _RBs) ->
-    erlang:raise(error, {undef_record,Name}, stacktrace());
+    erlang:raise(error, {undef_record,Name}, ?STACKTRACE);
 expr({record,_,Name,_}, _Bs, _Lf, _Ef, _RBs) ->
-    erlang:raise(error, {undef_record,Name}, stacktrace());
+    erlang:raise(error, {undef_record,Name}, ?STACKTRACE);
 expr({record,_,_,Name,_}, _Bs, _Lf, _Ef, _RBs) ->
-    erlang:raise(error, {undef_record,Name}, stacktrace());
+    erlang:raise(error, {undef_record,Name}, ?STACKTRACE);
 
 %% map
 expr({map,_,Binding,Es}, Bs0, Lf, Ef, RBs) ->
@@ -281,7 +284,7 @@ expr({'fun',_Line,{function,Mod0,Name0,Arity0}}, Bs0, Lf, Ef, RBs) ->
     ret_expr(F, Bs, RBs);    
 expr({'fun',_Line,{function,Name,Arity}}, _Bs0, _Lf, _Ef, _RBs) -> % R8
     %% Don't know what to do...
-    erlang:raise(error, undef, [{erl_eval,Name,Arity}|stacktrace()]);
+    erlang:raise(error, undef, [{?MODULE,Name,Arity}|?STACKTRACE]);
 expr({'fun',Line,{clauses,Cs}} = Ex, Bs, Lf, Ef, RBs) ->
     %% Save only used variables in the function environment.
     %% {value,L,V} are hidden while lint finds used variables.
@@ -326,7 +329,7 @@ expr({'fun',Line,{clauses,Cs}} = Ex, Bs, Lf, Ef, RBs) ->
            eval_fun([A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T], Info) end;
 	_Other ->
 	    erlang:raise(error, {'argument_limit',{'fun',Line,Cs}},
-			 stacktrace())
+			 ?STACKTRACE)
     end,
     ret_expr(F, Bs, RBs);
 expr({named_fun,Line,Name,Cs} = Ex, Bs, Lf, Ef, RBs) ->
@@ -378,7 +381,7 @@ expr({named_fun,Line,Name,Cs} = Ex, Bs, Lf, Ef, RBs) ->
                           RF, Info) end;
         _Other ->
             erlang:raise(error, {'argument_limit',{named_fun,Line,Name,Cs}},
-                         stacktrace())
+                         ?STACKTRACE)
     end,
     ret_expr(F, Bs, RBs);
 expr({call,_,{remote,_,{atom,_,qlc},{atom,_,q}},[{lc,_,_E,_Qs}=LC | As0]}, 
@@ -422,25 +425,28 @@ expr({call,_,Func0,As0}, Bs0, Lf, Ef, RBs) -> % function or {Mod,Fun}
     {As,Bs2} = expr_list(As0, Bs1, Lf, Ef),
     case Func of
 	{M,F} when is_atom(M), is_atom(F) ->
-	    erlang:raise(error, {badfun,Func}, stacktrace());
+	    erlang:raise(error, {badfun,Func}, ?STACKTRACE);
 	_ ->
 	    do_apply(Func, As, Bs2, Ef, RBs)
     end;
 expr({'catch',_,Expr}, Bs0, Lf, Ef, RBs) ->
-    Ref = make_ref(),
-    case catch {Ref,expr(Expr, Bs0, Lf, Ef, none)} of
-	{Ref,{value,V,Bs}} ->	  % Nothing was thrown (guaranteed).
-            ret_expr(V, Bs, RBs);
-	Other ->
-            ret_expr(Other, Bs0, RBs)
+    try expr(Expr, Bs0, Lf, Ef, none) of
+        {value,V,Bs} ->
+            ret_expr(V, Bs, RBs)
+    catch
+        throw:Term ->
+            ret_expr(Term, Bs0, RBs);
+        exit:Reason ->
+            ret_expr({'EXIT',Reason}, Bs0, RBs);
+        error:Reason:Stacktrace ->
+            ret_expr({'EXIT',{Reason,Stacktrace}}, Bs0, RBs)
     end;
 expr({match,_,Lhs,Rhs0}, Bs0, Lf, Ef, RBs) ->
     {value,Rhs,Bs1} = expr(Rhs0, Bs0, Lf, Ef, none),
     case match(Lhs, Rhs, Bs1) of
 	{match,Bs} ->
             ret_expr(Rhs, Bs, RBs);
-	nomatch ->
-	    erlang:raise(error, {badmatch,Rhs}, stacktrace())
+	nomatch -> erlang:raise(error, {badmatch,Rhs}, ?STACKTRACE)
     end;
 expr({op,_,Op,A0}, Bs0, Lf, Ef, RBs) ->
     {value,A,Bs} = expr(A0, Bs0, Lf, Ef, none),
@@ -452,7 +458,7 @@ expr({op,_,'andalso',L0,R0}, Bs0, Lf, Ef, RBs) ->
 		{value,R,_} = expr(R0, Bs1, Lf, Ef, none),
 		R;
 	    false -> false;
-	    _ -> erlang:raise(error, {badarg,L}, stacktrace())
+	    _ -> erlang:raise(error, {badarg,L}, ?STACKTRACE)
 	end,
     ret_expr(V, Bs1, RBs);
 expr({op,_,'orelse',L0,R0}, Bs0, Lf, Ef, RBs) ->
@@ -462,7 +468,7 @@ expr({op,_,'orelse',L0,R0}, Bs0, Lf, Ef, RBs) ->
 	    false ->
 		{value,R,_} = expr(R0, Bs1, Lf, Ef, none),
 		R;
-	    _ -> erlang:raise(error, {badarg,L}, stacktrace())
+	    _ -> erlang:raise(error, {badarg,L}, ?STACKTRACE)
 	end,
     ret_expr(V, Bs1, RBs);
 expr({op,_,Op,L0,R0}, Bs0, Lf, Ef, RBs) ->
@@ -474,7 +480,7 @@ expr({bin,_,Fs}, Bs0, Lf, Ef, RBs) ->
     {value,V,Bs} = eval_bits:expr_grp(Fs, Bs0, EvalFun),
     ret_expr(V, Bs, RBs);
 expr({remote,_,_,_}, _Bs, _Lf, _Ef, _RBs) ->
-    erlang:raise(error, {badexpr,':'}, stacktrace());
+    erlang:raise(error, {badexpr,':'}, ?STACKTRACE);
 expr({value,_,Val}, Bs, _Lf, _Ef, RBs) ->    % Special case straight values.
     ret_expr(Val, Bs, RBs).
 
@@ -570,7 +576,7 @@ local_func(Func, As, _Bs, {M,F,Eas}, _Ef, RBs) ->
     local_func2(apply(M, F, [Func,As|Eas]), RBs);
 %% Default unknown function handler to undefined function.
 local_func(Func, As0, _Bs0, none, _Ef, _RBs) ->
-    erlang:raise(error, undef, [{erl_eval,Func,length(As0)}|stacktrace()]).
+    erlang:raise(error, undef, [{?MODULE,Func,length(As0)}|?STACKTRACE]).
 
 local_func2({value,V,Bs}, RBs) ->
     ret_expr(V, Bs, RBs);
@@ -637,7 +643,7 @@ do_apply(Func, As, Bs0, Ef, RBs) ->
                 {{arity, Arity}, Arity} ->
                     eval_fun(FCs, As, FBs, FLf, FEf, NRBs);
                 _ ->
-                    erlang:raise(error, {badarity,{Func,As}},stacktrace())
+                    erlang:raise(error, {badarity,{Func,As}},?STACKTRACE)
             end;
         {{env,[{FBs,FLf,FEf,FCs,FName}]},_} ->
             NRBs = if
@@ -648,7 +654,7 @@ do_apply(Func, As, Bs0, Ef, RBs) ->
                 {{arity, Arity}, Arity} ->
                     eval_named_fun(FCs, As, FBs, FLf, FEf, FName, Func, NRBs);
                 _ ->
-                    erlang:raise(error, {badarity,{Func,As}},stacktrace())
+                    erlang:raise(error, {badarity,{Func,As}},?STACKTRACE)
             end;
         {no_env,none} when RBs =:= value ->
             %% Make tail recursive calls when possible.
@@ -730,7 +736,7 @@ eval_generate([V|Rest], P, Bs0, Lf, Ef, CompFun, Acc) ->
 eval_generate([], _P, _Bs0, _Lf, _Ef, _CompFun, Acc) ->
     Acc;
 eval_generate(Term, _P, _Bs0, _Lf, _Ef, _CompFun, _Acc) ->
-    erlang:raise(error, {bad_generator,Term}, stacktrace()).
+    erlang:raise(error, {bad_generator,Term}, ?STACKTRACE).
 
 eval_b_generate(<<_/bitstring>>=Bin, P, Bs0, Lf, Ef, CompFun, Acc) ->
     Mfun = match_fun(Bs0),
@@ -746,7 +752,7 @@ eval_b_generate(<<_/bitstring>>=Bin, P, Bs0, Lf, Ef, CompFun, Acc) ->
 	    Acc
     end;
 eval_b_generate(Term, _P, _Bs0, _Lf, _Ef, _CompFun, _Acc) ->
-    erlang:raise(error, {bad_generator,Term}, stacktrace()).
+    erlang:raise(error, {bad_generator,Term}, ?STACKTRACE).
 
 eval_filter(F, Bs0, Lf, Ef, CompFun, Acc) ->
     case erl_lint:is_guard_test(F) of
@@ -760,7 +766,7 @@ eval_filter(F, Bs0, Lf, Ef, CompFun, Acc) ->
 		{value,true,Bs1} -> CompFun(Bs1);
 		{value,false,_} -> Acc;
 		{value,V,_} -> 
-                    erlang:raise(error, {bad_filter,V}, stacktrace())
+                    erlang:raise(error, {bad_filter,V}, ?STACKTRACE)
 	    end
     end.
 
@@ -816,7 +822,7 @@ eval_fun([{clause,_,H,G,B}|Cs], As, Bs0, Lf, Ef, RBs) ->
     end;
 eval_fun([], As, _Bs, _Lf, _Ef, _RBs) ->
     erlang:raise(error, function_clause, 
-		 [{?MODULE,'-inside-an-interpreted-fun-',As}|stacktrace()]).
+		 [{?MODULE,'-inside-an-interpreted-fun-',As}|?STACKTRACE]).
 
 
 eval_named_fun(As, Fun, {Bs0,Lf,Ef,Cs,Name}) ->
@@ -836,7 +842,7 @@ eval_named_fun([{clause,_,H,G,B}|Cs], As, Bs0, Lf, Ef, Name, Fun, RBs) ->
     end;
 eval_named_fun([], As, _Bs, _Lf, _Ef, _Name, _Fun, _RBs) ->
     erlang:raise(error, function_clause,
-                 [{?MODULE,'-inside-an-interpreted-fun-',As}|stacktrace()]).
+                 [{?MODULE,'-inside-an-interpreted-fun-',As}|?STACKTRACE]).
 
 
 %% expr_list(ExpressionList, Bindings)
@@ -894,13 +900,13 @@ if_clauses([{clause,_,[],G,B}|Cs], Bs, Lf, Ef, RBs) ->
 	false -> if_clauses(Cs, Bs, Lf, Ef, RBs)
     end;
 if_clauses([], _Bs, _Lf, _Ef, _RBs) ->
-    erlang:raise(error, if_clause, stacktrace()).
+    erlang:raise(error, if_clause, ?STACKTRACE).
 
 %% try_clauses(Body, CaseClauses, CatchClauses, AfterBody, Bindings, 
 %%             LocalFuncHandler, ExtFuncHandler, RBs)
-%% When/if variable bindings between the different parts of a
-%% try-catch expression are introduced this will have to be rewritten.
+
 try_clauses(B, Cases, Catches, AB, Bs, Lf, Ef, RBs) ->
+    check_stacktrace_vars(Catches, Bs),
     try exprs(B, Bs, Lf, Ef, none) of
 	{value,V,Bs1} when Cases =:= [] ->
 	    ret_expr(V, Bs1, RBs);
@@ -909,23 +915,18 @@ try_clauses(B, Cases, Catches, AB, Bs, Lf, Ef, RBs) ->
 		{B2,Bs2} ->
 		    exprs(B2, Bs2, Lf, Ef, RBs);
 		nomatch ->
-		    erlang:raise(error, {try_clause,V}, stacktrace())
+		    erlang:raise(error, {try_clause,V}, ?STACKTRACE)
 	    end
     catch
-	Class:Reason when Catches =:= [] ->
-	    %% Rethrow
-	    erlang:raise(Class, Reason, stacktrace());
-	Class:Reason ->
-%%% 	    %% Set stacktrace
-%%% 	    try erlang:raise(Class, Reason, stacktrace())
-%%% 	    catch _:_ -> ok 
-%%% 	    end,
-            V = {Class,Reason,erlang:get_stacktrace()},
-	    case match_clause(Catches, [V],Bs, Lf, Ef) of
+	Class:Reason:Stacktrace when Catches =:= [] ->
+	    erlang:raise(Class, Reason, Stacktrace);
+	Class:Reason:Stacktrace ->
+            V = {Class,Reason,Stacktrace},
+	    case match_clause(Catches, [V], Bs, Lf, Ef) of
 		{B2,Bs2} ->
 		    exprs(B2, Bs2, Lf, Ef, RBs);
 		nomatch ->
-		    erlang:raise(Class, Reason, stacktrace())
+		    erlang:raise(Class, Reason, Stacktrace)
 	    end
     after
 	if AB =:= [] -> 
@@ -935,6 +936,23 @@ try_clauses(B, Cases, Catches, AB, Bs, Lf, Ef, RBs) ->
 	end
     end.
 
+check_stacktrace_vars([{clause,_,[{tuple,_,[_,_,STV]}],_,_}|Cs], Bs) ->
+    case STV of
+        {var,_,V} ->
+            case binding(V, Bs) of
+                {value, _} ->
+                    erlang:raise(error, stacktrace_bound, ?STACKTRACE);
+                unbound ->
+                    check_stacktrace_vars(Cs, Bs)
+            end;
+        _ ->
+            erlang:raise(error,
+                         {illegal_stacktrace_variable,STV},
+                         ?STACKTRACE)
+    end;
+check_stacktrace_vars([], _Bs) ->
+    ok.
+
 %% case_clauses(Value, Clauses, Bindings, LocalFuncHandler, ExtFuncHandler, 
 %%              RBs)
 
@@ -943,7 +961,7 @@ case_clauses(Val, Cs, Bs, Lf, Ef, RBs) ->
 	{B, Bs1} ->
 	    exprs(B, Bs1, Lf, Ef, RBs);
 	nomatch ->
-	    erlang:raise(error, {case_clause,Val}, stacktrace())
+	    erlang:raise(error, {case_clause,Val}, ?STACKTRACE)
     end.
 
 %%
@@ -1018,7 +1036,7 @@ guard0([G|Gs], Bs0, Lf, Ef) ->
                 {value,false,_} -> false
 	    end;
 	false ->
-	    erlang:raise(error, guard_expr, stacktrace())
+	    erlang:raise(error, guard_expr, ?STACKTRACE)
     end;
 guard0([], _Bs, _Lf, _Ef) -> true.
 
@@ -1073,7 +1091,7 @@ match(Pat, Term, Bs) ->
 match(Pat, Term, Bs, BBs) ->
     case catch match1(Pat, Term, Bs, BBs) of
 	invalid ->
-	    erlang:raise(error, {illegal_pattern,Pat}, stacktrace());
+	    erlang:raise(error, {illegal_pattern,Pat}, ?STACKTRACE);
 	Other ->
 	    Other
     end.
@@ -1254,7 +1272,7 @@ merge_bindings(Bs1, Bs2) ->
 		  case orddict:find(Name, Bs) of
 		      {ok,Val} -> Bs;		%Already with SAME value
 		      {ok,V1} -> 
-			  erlang:raise(error, {badmatch,V1}, stacktrace());
+			  erlang:raise(error, {badmatch,V1}, ?STACKTRACE);
 		      error -> orddict:store(Name, Val, Bs)
 		  end end,
 	  Bs2, orddict:to_list(Bs1)).
@@ -1264,7 +1282,7 @@ merge_bindings(Bs1, Bs2) ->
 %%       fun (Name, Val, Bs) ->
 %% 	      case orddict:find(Name, Bs) of
 %% 		  {ok,Val} -> orddict:erase(Name, Bs);
-%% 		  {ok,V1} -> erlang:raise(error,{badmatch,V1},stacktrace());
+%% 		  {ok,V1} -> erlang:raise(error,{badmatch,V1},?STACKTRACE);
 %% 		  error -> Bs
 %% 	      end
 %%       end, Bs2, Bs1).
@@ -1326,7 +1344,3 @@ ret_expr(_Old, New) ->
     New.
 
 line(Expr) -> element(2, Expr).
-
-%% {?MODULE,expr,3} is still the stacktrace, despite the
-%% fact that expr() now takes two, three or four arguments...
-stacktrace() -> [{?MODULE,expr,3}].
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index f58cb35cea..9a62d21d34 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -144,6 +144,7 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
                    :: dict:dict(ta(), #typeinfo{}),
                exp_types=gb_sets:empty()        %Exported types
                    :: gb_sets:set(ta()),
+               in_try_head=false :: boolean(),  %In a try head.
                catch_scope = none               %Inside/outside try or catch
                    :: catch_scope()
               }).
@@ -312,6 +313,10 @@ format_error({unused_var, V}) ->
     io_lib:format("variable ~w is unused", [V]);
 format_error({variable_in_record_def,V}) ->
     io_lib:format("variable ~w in record definition", [V]);
+format_error({stacktrace_guard,V}) ->
+    io_lib:format("stacktrace variable ~w must not be used in a guard", [V]);
+format_error({stacktrace_bound,V}) ->
+    io_lib:format("stacktrace variable ~w must not be previously bound", [V]);
 %% --- binaries ---
 format_error({undefined_bittype,Type}) ->
     io_lib:format("bit type ~tw undefined", [Type]);
@@ -3218,11 +3223,11 @@ is_module_dialyzer_option(Option) ->
 
 try_clauses(Scs, Ccs, In, Vt, St0) ->
     {Csvt0,St1} = icrt_clauses(Scs, Vt, St0),
-    St2 = St1#lint{catch_scope=try_catch},
+    St2 = St1#lint{catch_scope=try_catch,in_try_head=true},
     {Csvt1,St3} = icrt_clauses(Ccs, Vt, St2),
     Csvt = Csvt0 ++ Csvt1,
     UpdVt = icrt_export(Csvt, Vt, In, St3),
-    {UpdVt,St3}.
+    {UpdVt,St3#lint{in_try_head=false}}.
 
 %% icrt_clauses(Clauses, In, ImportVarTable, State) ->
 %%      {UpdVt,State}.
@@ -3239,12 +3244,29 @@ icrt_clauses(Cs, Vt, St) ->
     mapfoldl(fun (C, St0) -> icrt_clause(C, Vt, St0) end, St, Cs).
 
 icrt_clause({clause,_Line,H,G,B}, Vt0, #lint{catch_scope=Scope}=St0) ->
-    {Hvt,Binvt,St1} = head(H, Vt0, St0),
-    Vt1 = vtupdate(Hvt, Binvt),
-    {Gvt,St2} = guard(G, vtupdate(Vt1, Vt0), St1),
-    Vt2 = vtupdate(Gvt, Vt1),
-    {Bvt,St3} = exprs(B, vtupdate(Vt2, Vt0), St2),
-    {vtupdate(Bvt, Vt2),St3#lint{catch_scope=Scope}}.
+    Vt1 = taint_stack_var(Vt0, H, St0),
+    {Hvt,Binvt,St1} = head(H, Vt1, St0),
+    Vt2 = vtupdate(Hvt, Binvt),
+    Vt3 = taint_stack_var(Vt2, H, St0),
+    {Gvt,St2} = guard(G, vtupdate(Vt3, Vt0), St1#lint{in_try_head=false}),
+    Vt4 = vtupdate(Gvt, Vt2),
+    {Bvt,St3} = exprs(B, vtupdate(Vt4, Vt0), St2),
+    {vtupdate(Bvt, Vt4),St3#lint{catch_scope=Scope}}.
+
+taint_stack_var(Vt, Pat, #lint{in_try_head=true}) ->
+    [{tuple,_,[_,_,{var,_,Stk}]}] = Pat,
+    case Stk of
+        '_' ->
+            Vt;
+        _ ->
+            lists:map(fun({V,{bound,Used,Lines}}) when V =:= Stk ->
+                              {V,{stacktrace,Used,Lines}};
+                         (B) ->
+                              B
+                      end, Vt)
+    end;
+taint_stack_var(Vt, _Pat, #lint{in_try_head=false}) ->
+    Vt.
 
 icrt_export(Vts, Vt, {Tag,Attrs}, St) ->
     {_File,Loc} = loc(Attrs, St),
@@ -3484,6 +3506,9 @@ pat_var(V, Line, Vt, Bvt, St) ->
                     {[{V,{bound,used,Ls}}],[],
                      %% As this is matching, exported vars are risky.
                      add_warning(Line, {exported_var,V,From}, St)};
+                {ok,{stacktrace,_Usage,Ls}} ->
+                    {[{V,{bound,used,Ls}}],[],
+                     add_error(Line, {stacktrace_bound,V}, St)};
                 error when St#lint.recdef_top ->
                     {[],[{V,{bound,unused,[Line]}}],
                      add_error(Line, {variable_in_record_def,V}, St)};
@@ -3541,6 +3566,9 @@ expr_var(V, Line, Vt, St) ->
                 false ->
                     {[{V,{{export,From},used,Ls}}],St}
             end;
+        {ok,{stacktrace,_Usage,Ls}} ->
+            {[{V,{bound,used,Ls}}],
+             add_error(Line, {stacktrace_guard,V}, St)};
         error ->
             {[{V,{bound,used,[Line]}}],
              add_error(Line, {unbound_var,V}, St)}
@@ -3943,6 +3971,8 @@ extract_sequence(3, [$.,_|Fmt], Need) ->
     extract_sequence(4, Fmt, Need);
 extract_sequence(3, Fmt, Need) ->
     extract_sequence(4, Fmt, Need);
+extract_sequence(4, [$t, $l | Fmt], Need) ->
+    extract_sequence(4, [$l, $t | Fmt], Need);
 extract_sequence(4, [$t, $c | Fmt], Need) ->
     extract_sequence(5, [$c|Fmt], Need);
 extract_sequence(4, [$t, $s | Fmt], Need) ->
@@ -3959,8 +3989,14 @@ extract_sequence(4, [$t, C | _Fmt], _Need) ->
     {error,"invalid control ~t" ++ [C]};
 extract_sequence(4, [$l, $p | Fmt], Need) ->
     extract_sequence(5, [$p|Fmt], Need);
+extract_sequence(4, [$l, $t, $p | Fmt], Need) ->
+    extract_sequence(5, [$p|Fmt], Need);
 extract_sequence(4, [$l, $P | Fmt], Need) ->
     extract_sequence(5, [$P|Fmt], Need);
+extract_sequence(4, [$l, $t, $P | Fmt], Need) ->
+    extract_sequence(5, [$P|Fmt], Need);
+extract_sequence(4, [$l, $t, C | _Fmt], _Need) ->
+    {error,"invalid control ~lt" ++ [C]};
 extract_sequence(4, [$l, C | _Fmt], _Need) ->
     {error,"invalid control ~l" ++ [C]};
 extract_sequence(4, Fmt, Need) ->
diff --git a/lib/stdlib/src/erl_parse.yrl b/lib/stdlib/src/erl_parse.yrl
index 6e72d64acc..14ca24362e 100644
--- a/lib/stdlib/src/erl_parse.yrl
+++ b/lib/stdlib/src/erl_parse.yrl
@@ -29,6 +29,10 @@ clause_args clause_guard clause_body
 expr expr_100 expr_150 expr_160 expr_200 expr_300 expr_400 expr_500
 expr_600 expr_700 expr_800
 expr_max
+pat_expr pat_expr_200 pat_expr_300 pat_expr_400 pat_expr_500
+pat_expr_600 pat_expr_700 pat_expr_800
+pat_expr_max map_pat_expr record_pat_expr
+pat_argument_list pat_exprs
 list tail
 list_comprehension lc_expr lc_exprs
 binary_comprehension
@@ -37,7 +41,7 @@ record_expr record_tuple record_field record_fields
 map_expr map_tuple map_field map_field_assoc map_field_exact map_fields map_key
 if_expr if_clause if_clauses case_expr cr_clause cr_clauses receive_expr
 fun_expr fun_clause fun_clauses atom_or_var integer_or_var
-try_expr try_catch try_clause try_clauses
+try_expr try_catch try_clause try_clauses try_opt_stacktrace
 function_call argument_list
 exprs guard
 atomic strings
@@ -66,7 +70,7 @@ char integer float atom string var
 'spec' 'callback' % helper
 dot.
 
-Expect 2.
+Expect 0.
 
 Rootsymbol form.
 
@@ -210,7 +214,7 @@ function_clause -> atom clause_args clause_guard clause_body :
 	{clause,?anno('$1'),element(3, '$1'),'$2','$3','$4'}.
 
 
-clause_args -> argument_list : element(1, '$1').
+clause_args -> pat_argument_list : element(1, '$1').
 
 clause_guard -> 'when' guard : '$2'.
 clause_guard -> '$empty' : [].
@@ -275,6 +279,53 @@ expr_max -> receive_expr : '$1'.
 expr_max -> fun_expr : '$1'.
 expr_max -> try_expr : '$1'.
 
+pat_expr -> pat_expr_200 '=' pat_expr : {match,?anno('$2'),'$1','$3'}.
+pat_expr -> pat_expr_200 : '$1'.
+
+pat_expr_200 -> pat_expr_300 comp_op pat_expr_300 :
+	?mkop2('$1', '$2', '$3').
+pat_expr_200 -> pat_expr_300 : '$1'.
+
+pat_expr_300 -> pat_expr_400 list_op pat_expr_300 :
+	?mkop2('$1', '$2', '$3').
+pat_expr_300 -> pat_expr_400 : '$1'.
+
+pat_expr_400 -> pat_expr_400 add_op pat_expr_500 :
+	?mkop2('$1', '$2', '$3').
+pat_expr_400 -> pat_expr_500 : '$1'.
+
+pat_expr_500 -> pat_expr_500 mult_op pat_expr_600 :
+	?mkop2('$1', '$2', '$3').
+pat_expr_500 -> pat_expr_600 : '$1'.
+
+pat_expr_600 -> prefix_op pat_expr_700 :
+	?mkop1('$1', '$2').
+pat_expr_600 -> map_pat_expr : '$1'.
+pat_expr_600 -> pat_expr_700 : '$1'.
+
+pat_expr_700 -> record_pat_expr : '$1'.
+pat_expr_700 -> pat_expr_800 : '$1'.
+
+pat_expr_800 -> pat_expr_max : '$1'.
+
+pat_expr_max -> var : '$1'.
+pat_expr_max -> atomic : '$1'.
+pat_expr_max -> list : '$1'.
+pat_expr_max -> binary : '$1'.
+pat_expr_max -> tuple : '$1'.
+pat_expr_max -> '(' pat_expr ')' : '$2'.
+
+map_pat_expr -> '#' map_tuple :
+	{map, ?anno('$1'),'$2'}.
+map_pat_expr -> pat_expr_max '#' map_tuple :
+	{map, ?anno('$2'),'$1','$3'}.
+map_pat_expr -> map_pat_expr '#' map_tuple :
+	{map, ?anno('$2'),'$1','$3'}.
+
+record_pat_expr -> '#' atom '.' atom :
+	{record_index,?anno('$1'),element(3, '$2'),'$4'}.
+record_pat_expr -> '#' atom record_tuple :
+	{record,?anno('$1'),element(3, '$2'),'$3'}.
 
 list -> '[' ']' : {nil,?anno('$1')}.
 list -> '[' expr tail : {cons,?anno('$1'),'$2','$3'}.
@@ -397,6 +448,10 @@ case_expr -> 'case' expr 'of' cr_clauses 'end' :
 cr_clauses -> cr_clause : ['$1'].
 cr_clauses -> cr_clause ';' cr_clauses : ['$1' | '$3'].
 
+%% FIXME: merl in syntax_tools depends on patterns in a 'case' being
+%% full expressions. Therefore, we can't use pat_expr here. There
+%% should be a better way.
+
 cr_clause -> expr clause_guard clause_body :
 	{clause,?anno('$1'),['$1'],'$2','$3'}.
 
@@ -424,11 +479,11 @@ integer_or_var -> var : '$1'.
 fun_clauses -> fun_clause : ['$1'].
 fun_clauses -> fun_clause ';' fun_clauses : ['$1' | '$3'].
 
-fun_clause -> argument_list clause_guard clause_body :
+fun_clause -> pat_argument_list clause_guard clause_body :
 	{Args,Anno} = '$1',
 	{clause,Anno,'fun',Args,'$2','$3'}.
 
-fun_clause -> var argument_list clause_guard clause_body :
+fun_clause -> var pat_argument_list clause_guard clause_body :
 	{clause,element(2, '$1'),element(3, '$1'),element(1, '$2'),'$3','$4'}.
 
 try_expr -> 'try' exprs 'of' cr_clauses try_catch :
@@ -446,24 +501,31 @@ try_catch -> 'after' exprs 'end' :
 try_clauses -> try_clause : ['$1'].
 try_clauses -> try_clause ';' try_clauses : ['$1' | '$3'].
 
-try_clause -> expr clause_guard clause_body :
+try_clause -> pat_expr clause_guard clause_body :
 	A = ?anno('$1'),
 	{clause,A,[{tuple,A,[{atom,A,throw},'$1',{var,A,'_'}]}],'$2','$3'}.
-try_clause -> atom ':' expr clause_guard clause_body :
+try_clause -> atom ':' pat_expr try_opt_stacktrace clause_guard clause_body :
 	A = ?anno('$1'),
-	{clause,A,[{tuple,A,['$1','$3',{var,A,'_'}]}],'$4','$5'}.
-try_clause -> var ':' expr clause_guard clause_body :
+	{clause,A,[{tuple,A,['$1','$3',{var,A,'$4'}]}],'$5','$6'}.
+try_clause -> var ':' pat_expr try_opt_stacktrace clause_guard clause_body :
 	A = ?anno('$1'),
-	{clause,A,[{tuple,A,['$1','$3',{var,A,'_'}]}],'$4','$5'}.
+	{clause,A,[{tuple,A,['$1','$3',{var,A,'$4'}]}],'$5','$6'}.
 
+try_opt_stacktrace -> ':' var : element(3, '$2').
+try_opt_stacktrace -> '$empty' : '_'.
 
 argument_list -> '(' ')' : {[],?anno('$1')}.
 argument_list -> '(' exprs ')' : {'$2',?anno('$1')}.
 
+pat_argument_list -> '(' ')' : {[],?anno('$1')}.
+pat_argument_list -> '(' pat_exprs ')' : {'$2',?anno('$1')}.
 
 exprs -> expr : ['$1'].
 exprs -> expr ',' exprs : ['$1' | '$3'].
 
+pat_exprs -> pat_expr : ['$1'].
+pat_exprs -> pat_expr ',' pat_exprs : ['$1' | '$3'].
+
 guard -> exprs : ['$1'].
 guard -> exprs ';' guard : ['$1'|'$3'].
 
diff --git a/lib/stdlib/src/erl_posix_msg.erl b/lib/stdlib/src/erl_posix_msg.erl
index bfafca1ff7..8959fea498 100644
--- a/lib/stdlib/src/erl_posix_msg.erl
+++ b/lib/stdlib/src/erl_posix_msg.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -64,6 +64,7 @@ message_1(eduppkg) -> <<"duplicate package name">>;
 message_1(eexist) -> <<"file already exists">>;
 message_1(efault) -> <<"bad address in system call argument">>;
 message_1(efbig) -> <<"file too large">>;
+message_1(eftype) -> <<"EFTYPE">>;
 message_1(ehostdown) -> <<"host is down">>;
 message_1(ehostunreach) -> <<"host is unreachable">>;
 message_1(eidrm) -> <<"identifier removed">>;
@@ -115,6 +116,7 @@ message_1(enopkg) -> <<"package not installed">>;
 message_1(enoprotoopt) -> <<"bad proocol option">>;
 message_1(enospc) -> <<"no space left on device">>;
 message_1(enosr) -> <<"out of stream resources or not a stream device">>;
+message_1(enostr) -> <<"not a stream">>;
 message_1(enosym) -> <<"unresolved symbol name">>;
 message_1(enosys) -> <<"function not implemented">>;
 message_1(enotblk) -> <<"block device required">>;
@@ -128,6 +130,7 @@ message_1(enotty) -> <<"inappropriate device for ioctl">>;
 message_1(enotuniq) -> <<"name not unique on network">>;
 message_1(enxio) -> <<"no such device or address">>;
 message_1(eopnotsupp) -> <<"operation not supported on socket">>;
+message_1(eoverflow) -> <<"offset too large for file system">>;
 message_1(eperm) -> <<"not owner">>;
 message_1(epfnosupport) -> <<"protocol family not supported">>;
 message_1(epipe) -> <<"broken pipe">>;
@@ -167,4 +170,6 @@ message_1(ewouldblock) -> <<"operation would block">>;
 message_1(exdev) -> <<"cross-domain link">>;
 message_1(exfull) -> <<"message tables full">>;
 message_1(nxdomain) -> <<"non-existing domain">>;
+message_1(exbadport) -> <<"inet_drv bad port state">>;
+message_1(exbadseq) -> <<"inet_drv bad request sequence">>;
 message_1(_) -> <<"unknown POSIX error">>.
diff --git a/lib/stdlib/src/erl_tar.erl b/lib/stdlib/src/erl_tar.erl
index 76f0b38108..d8b8f466b1 100644
--- a/lib/stdlib/src/erl_tar.erl
+++ b/lib/stdlib/src/erl_tar.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -189,7 +189,7 @@ table(Name) ->
 %% Returns a list of names of the files in the tar file Name.
 %% Options accepted: compressed, verbose, cooked.
 -spec table(open_handle(), [compressed | verbose | cooked]) ->
-                   {ok, [tar_entry()]} | {error, term()}.
+                   {ok, [string() | tar_entry()]} | {error, term()}.
 table(Name, Opts) when is_list(Opts) ->
     foldl_read(Name, fun table1/4, [], table_opts(Opts)).
 
@@ -457,26 +457,61 @@ add(Reader, NameOrBin, NameInArchive, Options)
 
 do_add(#reader{access=write}=Reader, Name, NameInArchive, Options)
   when is_list(NameInArchive), is_list(Options) ->
-    RF = fun(F) -> file:read_link_info(F, [{time, posix}]) end,
+    RF = apply_file_info_opts_fun(Options, read_link_info),
     Opts = #add_opts{read_info=RF},
-    add1(Reader, Name, NameInArchive, add_opts(Options, Opts));
+    add1(Reader, Name, NameInArchive, add_opts(Options, Options, Opts));
 do_add(#reader{access=read},_,_,_) ->
     {error, eacces};
 do_add(Reader,_,_,_) ->
     {error, {badarg, Reader}}.
 
-add_opts([dereference|T], Opts) ->
-    RF = fun(F) -> file:read_file_info(F, [{time, posix}]) end,
-    add_opts(T, Opts#add_opts{read_info=RF});
-add_opts([verbose|T], Opts) ->
-    add_opts(T, Opts#add_opts{verbose=true});
-add_opts([{chunks,N}|T], Opts) ->
-    add_opts(T, Opts#add_opts{chunk_size=N});
-add_opts([_|T], Opts) ->
-    add_opts(T, Opts);
-add_opts([], Opts) ->
+add_opts([dereference|T], AllOptions, Opts) ->
+    RF = apply_file_info_opts_fun(AllOptions, read_file_info),
+    add_opts(T, AllOptions, Opts#add_opts{read_info=RF});
+add_opts([verbose|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts#add_opts{verbose=true});
+add_opts([{chunks,N}|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts#add_opts{chunk_size=N});
+add_opts([{atime,Value}|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts#add_opts{atime=Value});
+add_opts([{mtime,Value}|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts#add_opts{mtime=Value});
+add_opts([{ctime,Value}|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts#add_opts{ctime=Value});
+add_opts([{uid,Value}|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts#add_opts{uid=Value});
+add_opts([{gid,Value}|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts#add_opts{gid=Value});
+add_opts([_|T], AllOptions, Opts) ->
+    add_opts(T, AllOptions, Opts);
+add_opts([], _AllOptions, Opts) ->
     Opts.
 
+apply_file_info_opts(Opts, {ok, FileInfo}) ->
+    {ok, do_apply_file_info_opts(Opts, FileInfo)};
+apply_file_info_opts(_Opts, Other) ->
+    Other.
+
+do_apply_file_info_opts([{atime,Value}|T], FileInfo) ->
+    do_apply_file_info_opts(T, FileInfo#file_info{atime=Value});
+do_apply_file_info_opts([{mtime,Value}|T], FileInfo) ->
+    do_apply_file_info_opts(T, FileInfo#file_info{mtime=Value});
+do_apply_file_info_opts([{ctime,Value}|T], FileInfo) ->
+    do_apply_file_info_opts(T, FileInfo#file_info{ctime=Value});
+do_apply_file_info_opts([{uid,Value}|T], FileInfo) ->
+    do_apply_file_info_opts(T, FileInfo#file_info{uid=Value});
+do_apply_file_info_opts([{gid,Value}|T], FileInfo) ->
+    do_apply_file_info_opts(T, FileInfo#file_info{gid=Value});
+do_apply_file_info_opts([_|T], FileInfo) ->
+    do_apply_file_info_opts(T, FileInfo);
+do_apply_file_info_opts([], FileInfo) ->
+    FileInfo.
+
+apply_file_info_opts_fun(Options, InfoFunction) ->
+   fun(F) ->
+       apply_file_info_opts(Options, file:InfoFunction(F, [{time, posix}]))
+   end.
+
 add1(#reader{}=Reader, Name, NameInArchive, #add_opts{read_info=ReadInfo}=Opts)
   when is_list(Name) ->
     Res = case ReadInfo(Name) of
@@ -515,9 +550,11 @@ add1(Reader, Bin, NameInArchive, Opts) when is_binary(Bin) ->
                 name = NameInArchive,
                 size = byte_size(Bin),
                 typeflag = ?TYPE_REGULAR,
-                atime = Now,
-                mtime = Now,
-                ctime = Now,
+                atime = add_opts_time(Opts#add_opts.atime, Now),
+                mtime = add_opts_time(Opts#add_opts.mtime, Now),
+                ctime = add_opts_time(Opts#add_opts.ctime, Now),
+                uid = Opts#add_opts.uid,
+                gid = Opts#add_opts.gid,
                 mode = 8#100644},
     {ok, Reader2} = add_header(Reader, Header, Opts),
     Padding = skip_padding(byte_size(Bin)),
@@ -527,6 +564,9 @@ add1(Reader, Bin, NameInArchive, Opts) when is_binary(Bin) ->
         {error, Reason} -> {error, {NameInArchive, Reason}}
     end.
 
+add_opts_time(undefined, Now) -> Now;
+add_opts_time(Time, _Now) -> Time.
+
 add_directory(Reader, DirName, NameInArchive, Info, Opts) ->
     case file:list_dir(DirName) of
         {ok, []} ->
@@ -1650,8 +1690,12 @@ write_file(Name, Bin) ->
     case file:write_file(Name, Bin) of
         ok -> ok;
         {error,enoent} ->
-            ok = make_dirs(Name, file),
-            write_file(Name, Bin);
+            case make_dirs(Name, file) of
+                ok ->
+                    write_file(Name, Bin);
+                {error,Reason} ->
+                    throw({error, Reason})
+            end;
         {error,Reason} ->
             throw({error, Reason})
     end.
diff --git a/lib/stdlib/src/erl_tar.hrl b/lib/stdlib/src/erl_tar.hrl
index cff0c2f500..5d6cecbb66 100644
--- a/lib/stdlib/src/erl_tar.hrl
+++ b/lib/stdlib/src/erl_tar.hrl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -21,7 +21,12 @@
 -record(add_opts, {
 	 read_info,          %% Fun to use for read file/link info.
 	 chunk_size = 0,     %% For file reading when sending to sftp. 0=do not chunk
-         verbose = false}).  %% Verbose on/off.
+         verbose = false,    %% Verbose on/off.
+         atime = undefined,
+         mtime = undefined,
+         ctime = undefined,
+         uid = 0,
+         gid = 0}).
 -type add_opts() :: #add_opts{}.
 
 %% Options used when reading a tar archive.
@@ -36,7 +41,12 @@
 
 -type add_opt() :: dereference |
                    verbose |
-                   {chunks, pos_integer()}.
+                   {chunks, pos_integer()} |
+                   {atime, non_neg_integer()} |
+                   {mtime, non_neg_integer()} |
+                   {ctime, non_neg_integer()} |
+                   {uid, non_neg_integer()} |
+                   {gid, non_neg_integer()}.
 
 -type extract_opt() :: {cwd, string()} |
                        {files, [string()]} |
diff --git a/lib/stdlib/src/escript.erl b/lib/stdlib/src/escript.erl
index 132f8efbbe..beea9927d2 100644
--- a/lib/stdlib/src/escript.erl
+++ b/lib/stdlib/src/escript.erl
@@ -283,8 +283,7 @@ start(EscriptOptions) ->
         throw:Str ->
             io:format("escript: ~ts\n", [Str]),
             my_halt(127);
-        _:Reason ->
-            Stk = erlang:get_stacktrace(),
+        _:Reason:Stk ->
             io:format("escript: Internal error: ~tp\n", [Reason]),
             io:format("~tp\n", [Stk]),
             my_halt(127)
@@ -759,8 +758,8 @@ run(Module, Args) ->
         Module:main(Args),
         my_halt(0)
     catch
-        Class:Reason ->
-            fatal(format_exception(Class, Reason))
+        Class:Reason:StackTrace ->
+            fatal(format_exception(Class, Reason, StackTrace))
     end.
 
 -spec interpret(_, _, _, _) -> no_return().
@@ -793,8 +792,8 @@ interpret(Forms, HasRecs,  File, Args) ->
                                  end}),
         my_halt(0)
     catch
-        Class:Reason ->
-            fatal(format_exception(Class, Reason))
+        Class:Reason:StackTrace ->
+            fatal(format_exception(Class, Reason, StackTrace))
     end.
 
 report_errors(Errors) ->
@@ -873,7 +872,7 @@ eval_exprs([E|Es], Bs0, Lf, Ef, RBs) ->
     {value,_V,Bs} = erl_eval:expr(E, Bs0, Lf, Ef, RBs1),
     eval_exprs(Es, Bs, Lf, Ef, RBs).
 
-format_exception(Class, Reason) ->
+format_exception(Class, Reason, StackTrace) ->
     Enc = encoding(),
     P = case Enc of
             latin1 -> "P";
@@ -882,7 +881,6 @@ format_exception(Class, Reason) ->
     PF = fun(Term, I) ->
                  io_lib:format("~." ++ integer_to_list(I) ++ P, [Term, 50])
          end,
-    StackTrace = erlang:get_stacktrace(),
     StackFun = fun(M, _F, _A) -> (M =:= erl_eval) or (M =:= ?MODULE) end,
     lib:format_exception(1, Class, Reason, StackTrace, StackFun, PF, Enc).
 
@@ -916,8 +914,8 @@ hidden_apply(App, M, F, Args) ->
     try
 	apply(fun() -> M end(), F, Args)
     catch
-	error:undef ->
-	    case erlang:get_stacktrace() of
+	error:undef:StackTrace ->
+	    case StackTrace of
 		[{M,F,Args,_} | _] ->
 		    Arity = length(Args),
 		    Text = io_lib:format("Call to ~w:~w/~w in application ~w failed.\n",
diff --git a/lib/stdlib/src/ets.erl b/lib/stdlib/src/ets.erl
index 4858c8d13c..6a559f0be5 100644
--- a/lib/stdlib/src/ets.erl
+++ b/lib/stdlib/src/ets.erl
@@ -73,7 +73,8 @@
          select_count/2, select_delete/2, select_replace/2, select_reverse/1,
          select_reverse/2, select_reverse/3, setopts/2, slot/2,
          take/2,
-         update_counter/3, update_counter/4, update_element/3]).
+         update_counter/3, update_counter/4, update_element/3,
+         whereis/1]).
 
 %% internal exports
 -export([internal_request_all/0]).
@@ -145,6 +146,7 @@ give_away(_, _, _) ->
       InfoList :: [InfoTuple],
       InfoTuple :: {compressed, boolean()}
                  | {heir, pid() | none}
+                 | {id, tid()}
                  | {keypos, pos_integer()}
                  | {memory, non_neg_integer()}
                  | {name, atom()}
@@ -162,7 +164,7 @@ info(_) ->
 
 -spec info(Tab, Item) -> Value | undefined when
       Tab :: tab(),
-      Item :: compressed | fixed | heir | keypos | memory
+      Item :: compressed | fixed | heir | id | keypos | memory
             | name | named_table | node | owner | protection
             | safe_fixed | safe_fixed_monotonic_time | size | stats | type
 	    | write_concurrency | read_concurrency,
@@ -277,7 +279,7 @@ match_spec_compile(_) ->
     erlang:nif_error(undef).
 
 -spec match_spec_run_r(List, CompiledMatchSpec, list()) -> list() when
-      List :: [tuple()],
+      List :: [term()],
       CompiledMatchSpec :: comp_match_spec().
 
 match_spec_run_r(_, _, _) ->
@@ -512,12 +514,17 @@ update_counter(_, _, _, _) ->
 update_element(_, _, _) ->
     erlang:nif_error(undef).
 
+-spec whereis(TableName) -> tid() | undefined when
+    TableName :: atom().
+whereis(_) ->
+    erlang:nif_error(undef).
+
 %%% End of BIFs
 
 -opaque comp_match_spec() :: reference().
 
 -spec match_spec_run(List, CompiledMatchSpec) -> list() when
-      List :: [tuple()],
+      List :: [term()],
       CompiledMatchSpec :: comp_match_spec().
 
 match_spec_run(List, CompiledMS) ->
@@ -882,10 +889,10 @@ tab2file(Tab, File, Options) ->
 		_ = disk_log:close(Name),
 		_ = file:delete(File),
 		exit(ExReason);
-	    error:ErReason ->
+	    error:ErReason:StackTrace ->
 		_ = disk_log:close(Name),
 		_ = file:delete(File),
-	        erlang:raise(error,ErReason,erlang:get_stacktrace())
+	        erlang:raise(error,ErReason,StackTrace)
 	end
     catch
 	throw:TReason2 ->
@@ -1060,9 +1067,9 @@ file2tab(File, Opts) ->
 		exit:ExReason ->
 		    ets:delete(Tab),
 		    exit(ExReason);
-		error:ErReason ->
+		error:ErReason:StackTrace ->
 		    ets:delete(Tab),
-		    erlang:raise(error,ErReason,erlang:get_stacktrace())
+		    erlang:raise(error,ErReason,StackTrace)
 	    end
 	after
 	    _ = disk_log:close(Name)
@@ -1700,6 +1707,8 @@ choice(Height, Width, P, Mode, Tab, Key, Turn, Opos) ->
 		    io:format("~ts\n", [ErrorString]),
 		    choice(Height, Width, P, Mode, Tab, Key, Turn, Opos)
 	    end;
+        eof ->
+            ok;
 	_  ->
 	    choice(Height, Width, P, Mode, Tab, Key, Turn, Opos)
     end.
diff --git a/lib/stdlib/src/eval_bits.erl b/lib/stdlib/src/eval_bits.erl
index 631faa3be5..bb86a65c72 100644
--- a/lib/stdlib/src/eval_bits.erl
+++ b/lib/stdlib/src/eval_bits.erl
@@ -2,7 +2,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -25,6 +25,9 @@
 -export([expr_grp/3,expr_grp/5,match_bits/6, 
 	 match_bits/7,bin_gen/6]).
 
+-define(STACKTRACE,
+        element(2, erlang:process_info(self(), current_stacktrace))).
+
 %% Types used in this module:
 %% @type bindings(). An abstract structure for bindings between
 %% variables and values (the environment)
@@ -93,9 +96,9 @@ eval_exp_field1(V, Size, Unit, Type, Endian, Sign) ->
 	eval_exp_field(V, Size, Unit, Type, Endian, Sign)
     catch
 	error:system_limit ->
-	    error(system_limit);
+	    erlang:raise(error, system_limit, ?STACKTRACE);
 	error:_ ->
-	    error(badarg)
+	    erlang:raise(error, badarg, ?STACKTRACE)
     end.
 
 eval_exp_field(Val, Size, Unit, integer, little, signed) ->
@@ -131,7 +134,7 @@ eval_exp_field(Val, all, Unit, binary, _, _) ->
 	Size when Size rem Unit =:= 0 ->
 	    <<Val:Size/binary-unit:1>>;
 	_ ->
-	    error(badarg)
+	    erlang:raise(error, badarg, ?STACKTRACE)
     end;
 eval_exp_field(Val, Size, Unit, binary, _, _) ->
     <<Val:(Size*Unit)/binary-unit:1>>.
@@ -377,12 +380,12 @@ make_bit_type(Line, default, Type0) ->
         {ok,all,Bt} -> {{atom,Line,all},erl_bits:as_list(Bt)};
 	{ok,undefined,Bt} -> {{atom,Line,undefined},erl_bits:as_list(Bt)};
         {ok,Size,Bt} -> {{integer,Line,Size},erl_bits:as_list(Bt)};
-        {error,Reason} -> error(Reason)
+        {error,Reason} -> erlang:raise(error, Reason, ?STACKTRACE)
     end;
 make_bit_type(_Line, Size, Type0) -> %Size evaluates to an integer or 'all'
     case erl_bits:set_bit_type(Size, Type0) of
         {ok,Size,Bt} -> {Size,erl_bits:as_list(Bt)};
-        {error,Reason} -> error(Reason)
+        {error,Reason} -> erlang:raise(error, Reason, ?STACKTRACE)
     end.
 
 match_check_size(Mfun, Size, Bs) ->
@@ -405,9 +408,3 @@ match_check_size(_, {value,_,_}, _Bs, _AllowAll) ->
     ok;	%From the debugger.
 match_check_size(_, _, _Bs, _AllowAll) ->
     throw(invalid).
-
-%% error(Reason) -> exception thrown
-%%  Throw a nice-looking exception, similar to exceptions from erl_eval.
-error(Reason) ->
-    erlang:raise(error, Reason, [{erl_eval,expr,3}]).
-
diff --git a/lib/stdlib/src/file_sorter.erl b/lib/stdlib/src/file_sorter.erl
index 3aeaff8dc4..7f74e71136 100644
--- a/lib/stdlib/src/file_sorter.erl
+++ b/lib/stdlib/src/file_sorter.erl
@@ -1314,9 +1314,9 @@ infun(W) ->
             {cont, W#w{in = NFun}, Objs};
         Error ->
             error(Error, W1)
-    catch Class:Reason ->
+    catch Class:Reason:Stacktrace ->
         cleanup(W1),
-        erlang:raise(Class, Reason, erlang:get_stacktrace())
+        erlang:raise(Class, Reason, Stacktrace)
     end.
 
 outfun(A, #w{inout_value = Val} = W) when Val =/= no_value ->
@@ -1336,9 +1336,9 @@ outfun(A, W) ->
             W#w{out = NF};
         Error ->
             error(Error, W1)
-    catch Class:Reason ->
+    catch Class:Reason:Stacktrace ->
         cleanup(W1),
-        erlang:raise(Class, Reason, erlang:get_stacktrace())
+        erlang:raise(Class, Reason, Stacktrace)
     end.
 
 is_keypos(Keypos) when is_integer(Keypos), Keypos > 0 ->
diff --git a/lib/stdlib/src/filelib.erl b/lib/stdlib/src/filelib.erl
index 0f90b3fc33..de839be5cf 100644
--- a/lib/stdlib/src/filelib.erl
+++ b/lib/stdlib/src/filelib.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -582,17 +582,16 @@ default_search_rules() ->
      {"", ".c", c_source_search_rules()},
      {"", ".in", basic_source_search_rules()},
      %% plain old directory rules, backwards compatible
-     {"", ""},
-     {"ebin","src"},
-     {"ebin","esrc"}
-    ].
+     {"", ""}] ++ erl_source_search_rules().
 
 basic_source_search_rules() ->
     (erl_source_search_rules()
      ++ c_source_search_rules()).
 
 erl_source_search_rules() ->
-    [{"ebin","src"}, {"ebin","esrc"}].
+    [{"ebin","src"}, {"ebin","esrc"},
+     {"ebin",filename:join("src", "*")},
+     {"ebin",filename:join("esrc", "*")}].
 
 c_source_search_rules() ->
     [{"priv","c_src"}, {"priv","src"}, {"bin","c_src"}, {"bin","src"}, {"", "src"}].
@@ -672,8 +671,16 @@ try_dir_rule(Dir, Filename, From, To) ->
 	    Src = filename:join(NewDir, Filename),
 	    case is_regular(Src) of
 		true -> {ok, Src};
-		false -> error
+		false -> find_regular_file(wildcard(Src))
 	    end;
 	false ->
 	    error
     end.
+
+find_regular_file([]) ->
+    error;
+find_regular_file([File|Files]) ->
+    case is_regular(File) of
+        true -> {ok, File};
+        false -> find_regular_file(Files)
+    end.
diff --git a/lib/stdlib/src/filename.erl b/lib/stdlib/src/filename.erl
index 919f8f20e6..a322bd002d 100644
--- a/lib/stdlib/src/filename.erl
+++ b/lib/stdlib/src/filename.erl
@@ -472,6 +472,10 @@ join(Name1, Name2) when is_atom(Name2) ->
 join1([UcLetter, $:|Rest], RelativeName, [], win32)
 when is_integer(UcLetter), UcLetter >= $A, UcLetter =< $Z ->
     join1(Rest, RelativeName, [$:, UcLetter+$a-$A], win32);
+join1([$\\,$\\|Rest], RelativeName, [], win32) ->
+    join1([$/,$/|Rest], RelativeName, [], win32);
+join1([$/,$/|Rest], RelativeName, [], win32) ->
+    join1(Rest, RelativeName, [$/,$/], win32);
 join1([$\\|Rest], RelativeName, Result, win32) ->
     join1([$/|Rest], RelativeName, Result, win32);
 join1([$/|Rest], RelativeName, [$., $/|Result], OsType) ->
@@ -500,6 +504,10 @@ join1([Atom|Rest], RelativeName, Result, OsType) when is_atom(Atom) ->
 join1b(<<UcLetter, $:, Rest/binary>>, RelativeName, [], win32)
 when is_integer(UcLetter), UcLetter >= $A, UcLetter =< $Z ->
     join1b(Rest, RelativeName, [$:, UcLetter+$a-$A], win32);
+join1b(<<$\\,$\\,Rest/binary>>, RelativeName, [], win32) ->
+    join1b(<<$/,$/,Rest/binary>>, RelativeName, [], win32);
+join1b(<<$/,$/,Rest/binary>>, RelativeName, [], win32) ->
+    join1b(Rest, RelativeName, [$/,$/], win32);
 join1b(<<$\\,Rest/binary>>, RelativeName, Result, win32) ->
     join1b(<<$/,Rest/binary>>, RelativeName, Result, win32);
 join1b(<<$/,Rest/binary>>, RelativeName, [$., $/|Result], OsType) ->
@@ -510,6 +518,8 @@ join1b(<<>>, <<>>, Result, OsType) ->
     list_to_binary(maybe_remove_dirsep(Result, OsType));
 join1b(<<>>, RelativeName, [$:|Rest], win32) ->
     join1b(RelativeName, <<>>, [$:|Rest], win32);
+join1b(<<>>, RelativeName, [$/,$/|Result], win32) ->
+    join1b(RelativeName, <<>>, [$/,$/|Result], win32);
 join1b(<<>>, RelativeName, [$/|Result], OsType) ->
     join1b(RelativeName, <<>>, [$/|Result], OsType);
 join1b(<<>>, RelativeName, [$., $/|Result], OsType) ->
@@ -523,6 +533,8 @@ maybe_remove_dirsep([$/, $:, Letter], win32) ->
     [Letter, $:, $/];
 maybe_remove_dirsep([$/], _) ->
     [$/];
+maybe_remove_dirsep([$/,$/], win32) ->
+    [$/,$/];
 maybe_remove_dirsep([$/|Name], _) ->
     lists:reverse(Name);
 maybe_remove_dirsep(Name, _) ->
@@ -712,6 +724,9 @@ win32_splitb(<<Letter0,$:,Rest/binary>>) when ?IS_DRIVELETTER(Letter0) ->
     Letter = fix_driveletter(Letter0),
     L = binary:split(Rest,[<<"/">>,<<"\\">>],[global]),
     [<<Letter,$:>> | [ X || X <- L, X =/= <<>> ]];
+win32_splitb(<<Slash,Slash,Rest/binary>>) when ((Slash =:= $\\) orelse (Slash =:= $/)) ->
+    L = binary:split(Rest,[<<"/">>,<<"\\">>],[global]),
+    [<<"//">> | [ X || X <- L, X =/= <<>> ]];
 win32_splitb(<<Slash,Rest/binary>>) when ((Slash =:= $\\) orelse (Slash =:= $/)) ->
     L = binary:split(Rest,[<<"/">>,<<"\\">>],[global]),
     [<<$/>> | [ X || X <- L, X =/= <<>> ]];
@@ -723,6 +738,8 @@ win32_splitb(Name) ->
 unix_split(Name) ->
     split(Name, [], unix).
 
+win32_split([Slash,Slash|Rest]) when ((Slash =:= $\\) orelse (Slash =:= $/)) ->
+    split(Rest, [[$/,$/]], win32);
 win32_split([$\\|Rest]) ->
     win32_split([$/|Rest]);
 win32_split([X, $\\|Rest]) when is_integer(X) ->
diff --git a/lib/stdlib/src/gen.erl b/lib/stdlib/src/gen.erl
index 33af0aed8f..2e6223d2bb 100644
--- a/lib/stdlib/src/gen.erl
+++ b/lib/stdlib/src/gen.erl
@@ -49,6 +49,7 @@
                     | {'logfile', string()}.
 -type option()     :: {'timeout', timeout()}
 		    | {'debug', [debug_flag()]}
+		    | {'hibernate_after', timeout()}
 		    | {'spawn_opt', [proc_lib:spawn_option()]}.
 -type options()    :: [option()].
 
@@ -147,57 +148,36 @@ init_it2(GenMod, Starter, Parent, Name, Mod, Args, Options) ->
 call(Process, Label, Request) -> 
     call(Process, Label, Request, ?default_timeout).
 
+%% Optimize a common case.
+call(Process, Label, Request, Timeout) when is_pid(Process),
+  Timeout =:= infinity orelse is_integer(Timeout) andalso Timeout >= 0 ->
+    do_call(Process, Label, Request, Timeout);
 call(Process, Label, Request, Timeout)
   when Timeout =:= infinity; is_integer(Timeout), Timeout >= 0 ->
     Fun = fun(Pid) -> do_call(Pid, Label, Request, Timeout) end,
     do_for_proc(Process, Fun).
 
-do_call(Process, Label, Request, Timeout) ->
-    try erlang:monitor(process, Process) of
-	Mref ->
-	    %% If the monitor/2 call failed to set up a connection to a
-	    %% remote node, we don't want the '!' operator to attempt
-	    %% to set up the connection again. (If the monitor/2 call
-	    %% failed due to an expired timeout, '!' too would probably
-	    %% have to wait for the timeout to expire.) Therefore,
-	    %% use erlang:send/3 with the 'noconnect' option so that it
-	    %% will fail immediately if there is no connection to the
-	    %% remote node.
-
-	    catch erlang:send(Process, {Label, {self(), Mref}, Request},
-		  [noconnect]),
-	    receive
-		{Mref, Reply} ->
-		    erlang:demonitor(Mref, [flush]),
-		    {ok, Reply};
-		{'DOWN', Mref, _, _, noconnection} ->
-		    Node = get_node(Process),
-		    exit({nodedown, Node});
-		{'DOWN', Mref, _, _, Reason} ->
-		    exit(Reason)
-	    after Timeout ->
-		    erlang:demonitor(Mref, [flush]),
-		    exit(timeout)
-	    end
-    catch
-	error:_ ->
-	    %% Node (C/Java?) is not supporting the monitor.
-	    %% The other possible case -- this node is not distributed
-	    %% -- should have been handled earlier.
-	    %% Do the best possible with monitor_node/2.
-	    %% This code may hang indefinitely if the Process 
-	    %% does not exist. It is only used for featureweak remote nodes.
-	    Node = get_node(Process),
-	    monitor_node(Node, true),
-	    receive
-		{nodedown, Node} -> 
-		    monitor_node(Node, false),
-		    exit({nodedown, Node})
-	    after 0 -> 
-		    Tag = make_ref(),
-		    Process ! {Label, {self(), Tag}, Request},
-		    wait_resp(Node, Tag, Timeout)
-	    end
+do_call(Process, Label, Request, Timeout) when is_atom(Process) =:= false ->
+    Mref = erlang:monitor(process, Process),
+
+    %% OTP-21:
+    %% Auto-connect is asynchronous. But we still use 'noconnect' to make sure
+    %% we send on the monitored connection, and not trigger a new auto-connect.
+    %%
+    erlang:send(Process, {Label, {self(), Mref}, Request}, [noconnect]),
+
+    receive
+        {Mref, Reply} ->
+            erlang:demonitor(Mref, [flush]),
+            {ok, Reply};
+        {'DOWN', Mref, _, _, noconnection} ->
+            Node = get_node(Process),
+            exit({nodedown, Node});
+        {'DOWN', Mref, _, _, Reason} ->
+            exit(Reason)
+    after Timeout ->
+            erlang:demonitor(Mref, [flush]),
+            exit(timeout)
     end.
 
 get_node(Process) ->
@@ -212,19 +192,6 @@ get_node(Process) ->
 	    node(Process)
     end.
 
-wait_resp(Node, Tag, Timeout) ->
-    receive
-	{Tag, Reply} ->
-	    monitor_node(Node, false),
-	    {ok, Reply};
-	{nodedown, Node} ->
-	    monitor_node(Node, false),
-	    exit({nodedown, Node})
-    after Timeout ->
-	    monitor_node(Node, false),
-	    exit(timeout)
-    end.
-
 %%
 %% Send a reply to the client.
 %%
diff --git a/lib/stdlib/src/gen_event.erl b/lib/stdlib/src/gen_event.erl
index a9b98911e2..73e4457bd0 100644
--- a/lib/stdlib/src/gen_event.erl
+++ b/lib/stdlib/src/gen_event.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -125,7 +125,8 @@
                     | {'logfile', string()}.
 -type option() :: {'timeout', timeout()}
                 | {'debug', [debug_flag()]}
-                | {'spawn_opt', [proc_lib:spawn_option()]}.
+                | {'spawn_opt', [proc_lib:spawn_option()]}
+                | {'hibernate_after', timeout()}.
 -type emgr_ref()  :: atom() | {atom(), atom()} |  {'global', atom()}
                    | {'via', atom(), term()} | pid().
 -type start_ret() :: {'ok', pid()} | {'error', term()}.
diff --git a/lib/stdlib/src/gen_fsm.erl b/lib/stdlib/src/gen_fsm.erl
index 96a53426e2..8c7db65563 100644
--- a/lib/stdlib/src/gen_fsm.erl
+++ b/lib/stdlib/src/gen_fsm.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -198,7 +198,7 @@
 %%% start(Name, Mod, Args, Options)
 %%% start_link(Mod, Args, Options)
 %%% start_link(Name, Mod, Args, Options) where:
-%%%    Name ::= {local, atom()} | {global, atom()} | {via, atom(), term()}
+%%%    Name ::= {local, atom()} | {global, term()} | {via, atom(), term()}
 %%%    Mod  ::= atom(), callback module implementing the 'real' fsm
 %%%    Args ::= term(), init arguments (to Mod:init/1)
 %%%    Options ::= [{debug, [Flag]}]
diff --git a/lib/stdlib/src/gen_server.erl b/lib/stdlib/src/gen_server.erl
index ac172325b5..f29314d0a2 100644
--- a/lib/stdlib/src/gen_server.erl
+++ b/lib/stdlib/src/gen_server.erl
@@ -109,7 +109,7 @@
 
 -define(
    STACKTRACE(),
-   try throw(ok) catch _ -> erlang:get_stacktrace() end).
+   element(2, erlang:process_info(self(), current_stacktrace))).
 
 %%%=========================================================================
 %%%  API
@@ -369,7 +369,7 @@ init_it(Mod, Args) ->
 	{ok, Mod:init(Args)}
     catch
 	throw:R -> {ok, R};
-	Class:R -> {'EXIT', Class, R, erlang:get_stacktrace()}
+	Class:R:S -> {'EXIT', Class, R, S}
     end.
 
 %%%========================================================================
@@ -437,12 +437,11 @@ decode_msg(Msg, Parent, Name, State, Mod, Time, HibernateAfterTimeout, Debug, Hi
 %%% Send/receive functions
 %%% ---------------------------------------------------
 do_send(Dest, Msg) ->
-    case catch erlang:send(Dest, Msg, [noconnect]) of
-	noconnect ->
-	    spawn(erlang, send, [Dest,Msg]);
-	Other ->
-	    Other
-    end.
+    try erlang:send(Dest, Msg)
+    catch
+        error:_ -> ok
+    end,
+    ok.
 
 do_multi_call(Nodes, Name, Req, infinity) ->
     Tag = make_ref(),
@@ -634,7 +633,7 @@ try_dispatch(Mod, Func, Msg, State) ->
     catch
 	throw:R ->
 	    {ok, R};
-        error:undef = R when Func == handle_info ->
+        error:undef = R:Stacktrace when Func == handle_info ->
             case erlang:function_exported(Mod, handle_info, 2) of
                 false ->
                     error_logger:warning_msg("** Undefined handle_info in ~p~n"
@@ -642,10 +641,10 @@ try_dispatch(Mod, Func, Msg, State) ->
                                              [Mod, Msg]),
                     {ok, {noreply, State}};
                 true ->
-                    {'EXIT', error, R, erlang:get_stacktrace()}
+                    {'EXIT', error, R, Stacktrace}
             end;
-	Class:R ->
-	    {'EXIT', Class, R, erlang:get_stacktrace()}
+	Class:R:Stacktrace ->
+	    {'EXIT', Class, R, Stacktrace}
     end.
 
 try_handle_call(Mod, Msg, From, State) ->
@@ -654,8 +653,8 @@ try_handle_call(Mod, Msg, From, State) ->
     catch
 	throw:R ->
 	    {ok, R};
-	Class:R ->
-	    {'EXIT', Class, R, erlang:get_stacktrace()}
+	Class:R:Stacktrace ->
+	    {'EXIT', Class, R, Stacktrace}
     end.
 
 try_terminate(Mod, Reason, State) ->
@@ -666,8 +665,8 @@ try_terminate(Mod, Reason, State) ->
 	    catch
 		throw:R ->
 		    {ok, R};
-		Class:R ->
-		    {'EXIT', Class, R, erlang:get_stacktrace()}
+		Class:R:Stacktrace ->
+		    {'EXIT', Class, R, Stacktrace}
 	   end;
 	false ->
 	    {ok, ok}
diff --git a/lib/stdlib/src/gen_statem.erl b/lib/stdlib/src/gen_statem.erl
index cd6312855d..7f5d82cc21 100644
--- a/lib/stdlib/src/gen_statem.erl
+++ b/lib/stdlib/src/gen_statem.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2016-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2016-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -78,9 +78,11 @@
 -type data() :: term().
 
 -type event_type() ::
-	{'call',From :: from()} | 'cast' | 'info' |
-	'timeout' | {'timeout', Name :: term()} | 'state_timeout' |
-	'internal'.
+        external_event_type() | timeout_event_type() | 'internal'.
+-type external_event_type() ::
+        {'call',From :: from()} | 'cast' | 'info'.
+-type timeout_event_type() ::
+        'timeout' | {'timeout', Name :: term()} | 'state_timeout'.
 
 -type callback_mode_result() ::
 	callback_mode() | [callback_mode() | state_enter()].
@@ -138,7 +140,9 @@
 -type enter_action() ::
 	'hibernate' | % Set the hibernate option
 	{'hibernate', Hibernate :: hibernate()} |
-	%%
+        timeout_action() |
+	reply_action().
+-type timeout_action() ::
 	(Timeout :: event_timeout()) | % {timeout,Timeout}
 	{'timeout', % Set the event_timeout option
 	 Time :: event_timeout(), EventContent :: term()} |
@@ -159,9 +163,7 @@
 	{'state_timeout', % Set the state_timeout option
 	 Time :: state_timeout(),
 	 EventContent :: term(),
-	 Options :: (timeout_option() | [timeout_option()])} |
-	%%
-	reply_action().
+	 Options :: (timeout_option() | [timeout_option()])}.
 -type reply_action() ::
 	{'reply', % Reply to a caller
 	 From :: from(), Reply :: term()}.
@@ -320,7 +322,13 @@
     handle_event/4 % For callback_mode() =:= handle_event_function
    ]).
 
+
+
 %% Type validation functions
+-compile(
+   {inline,
+    [callback_mode/1, state_enter/1, from/1, event_type/1]}).
+%%
 callback_mode(CallbackMode) ->
     case CallbackMode of
 	state_functions -> true;
@@ -328,6 +336,14 @@ callback_mode(CallbackMode) ->
 	_ -> false
     end.
 %%
+state_enter(StateEnter) ->
+    case StateEnter of
+        state_enter ->
+            true;
+        _ ->
+            false
+    end.
+%%
 from({Pid,_}) when is_pid(Pid) -> true;
 from(_) -> false.
 %%
@@ -349,7 +365,49 @@ event_type(Type) ->
 
 -define(
    STACKTRACE(),
-   try throw(ok) catch _ -> erlang:get_stacktrace() end).
+   element(2, erlang:process_info(self(), current_stacktrace))).
+
+-define(not_sys_debug, []).
+%%
+%% This is a macro to only evaluate arguments if Debug =/= [].
+%% Debug is evaluated multiple times.
+-define(
+   sys_debug(Debug, NameState, Entry),
+   case begin Debug end of
+       ?not_sys_debug ->
+           begin Debug end;
+       _ ->
+           sys_debug(begin Debug end, begin NameState end, begin Entry end)
+    end).
+
+-record(state,
+        {callback_mode = undefined :: callback_mode() | undefined,
+         state_enter = false :: boolean(),
+         module :: atom(),
+         name :: atom(),
+         state :: term(),
+         data :: term(),
+         postponed = [] :: [{event_type(),term()}],
+         %%
+         timer_refs = #{} :: % timer ref => the timer's event type
+           #{reference() => timeout_event_type()},
+         timer_types = #{} ::  % timer's event type => timer ref
+           #{timeout_event_type() => reference()},
+         cancel_timers = 0 :: non_neg_integer(),
+         %% We add a timer to both timer_refs and timer_types
+         %% when we start it.  When we request an asynchronous
+         %% timer cancel we remove it from timer_types.  When
+         %% the timer cancel message arrives we remove it from
+         %% timer_refs.
+         %%
+         hibernate = false :: boolean(),
+         hibernate_after = infinity :: timeout()}).
+
+-record(trans_opts,
+        {hibernate = false,
+         postpone = false,
+         timeouts_r = [],
+         next_events_r = []}).
 
 %%%==========================================================================
 %%% API
@@ -422,6 +480,10 @@ stop(ServerRef, Reason, Timeout) ->
 
 %% Send an event to a state machine that arrives with type 'event'
 -spec cast(ServerRef :: server_ref(), Msg :: term()) -> ok.
+cast(ServerRef, Msg) when is_pid(ServerRef) ->
+    send(ServerRef, wrap_cast(Msg));
+cast(ServerRef, Msg) when is_atom(ServerRef) ->
+    send(ServerRef, wrap_cast(Msg));
 cast({global,Name}, Msg) ->
     try	global:send(Name, wrap_cast(Msg)) of
 	_ -> ok
@@ -435,10 +497,6 @@ cast({via,RegMod,Name}, Msg) ->
 	_:_ -> ok
     end;
 cast({Name,Node} = ServerRef, Msg) when is_atom(Name), is_atom(Node) ->
-    send(ServerRef, wrap_cast(Msg));
-cast(ServerRef, Msg) when is_atom(ServerRef) ->
-    send(ServerRef, wrap_cast(Msg));
-cast(ServerRef, Msg) when is_pid(ServerRef) ->
     send(ServerRef, wrap_cast(Msg)).
 
 %% Call a state machine (synchronous; a reply is expected) that
@@ -455,73 +513,16 @@ call(ServerRef, Request) ->
 	  {'clean_timeout',T :: timeout()} |
 	  {'dirty_timeout',T :: timeout()}) ->
 		  Reply :: term().
+call(ServerRef, Request, infinity = T = Timeout) ->
+    call_dirty(ServerRef, Request, Timeout, T);
+call(ServerRef, Request, {dirty_timeout, T} = Timeout) ->
+    call_dirty(ServerRef, Request, Timeout, T);
+call(ServerRef, Request, {clean_timeout, T} = Timeout) ->
+    call_clean(ServerRef, Request, Timeout, T);
+call(ServerRef, Request, {_, _} = Timeout) ->
+    erlang:error(badarg, [ServerRef,Request,Timeout]);
 call(ServerRef, Request, Timeout) ->
-    case parse_timeout(Timeout) of
-	{dirty_timeout,T} ->
-	    try gen:call(ServerRef, '$gen_call', Request, T) of
-		{ok,Reply} ->
-		    Reply
-	    catch
-		Class:Reason ->
-		    erlang:raise(
-		      Class,
-		      {Reason,{?MODULE,call,[ServerRef,Request,Timeout]}},
-		      erlang:get_stacktrace())
-	    end;
-	{clean_timeout,T} ->
-	    %% Call server through proxy process to dodge any late reply
-	    Ref = make_ref(),
-	    Self = self(),
-	    Pid = spawn(
-		    fun () ->
-			    Self !
-				try gen:call(
-				      ServerRef, '$gen_call', Request, T) of
-				    Result ->
-					{Ref,Result}
-				catch Class:Reason ->
-					{Ref,Class,Reason,
-					 erlang:get_stacktrace()}
-				end
-		    end),
-	    Mref = monitor(process, Pid),
-	    receive
-		{Ref,Result} ->
-		    demonitor(Mref, [flush]),
-		    case Result of
-			{ok,Reply} ->
-			    Reply
-		    end;
-		{Ref,Class,Reason,Stacktrace} ->
-		    demonitor(Mref, [flush]),
-		    erlang:raise(
-		      Class,
-		      {Reason,{?MODULE,call,[ServerRef,Request,Timeout]}},
-		      Stacktrace);
-		{'DOWN',Mref,_,_,Reason} ->
-		    %% There is a theoretical possibility that the
-		    %% proxy process gets killed between try--of and !
-		    %% so this clause is in case of that
-		    exit(Reason)
-	    end;
-	Error when is_atom(Error) ->
-	    erlang:error(Error, [ServerRef,Request,Timeout])
-    end.
-
-parse_timeout(Timeout) ->
-    case Timeout of
-	{clean_timeout,_} ->
-	    Timeout;
-	{dirty_timeout,_} ->
-	    Timeout;
-	{_,_} ->
-	    %% Be nice and throw a badarg for speling errors
-	    badarg;
-	infinity ->
-	    {dirty_timeout,infinity};
-	T ->
-	    {clean_timeout,T}
-    end.
+    call_clean(ServerRef, Request, Timeout, Timeout).
 
 %% Reply from a state machine callback to whom awaits in call/2
 -spec reply([reply_action()] | reply_action()) -> ok.
@@ -530,6 +531,7 @@ reply({reply,From,Reply}) ->
 reply(Replies) when is_list(Replies) ->
     replies(Replies).
 %%
+-compile({inline, [reply/2]}).
 -spec reply(From :: from(), Reply :: term()) -> ok.
 reply({To,Tag}, Reply) when is_pid(To) ->
     Msg = {Tag,Reply},
@@ -579,9 +581,58 @@ enter_loop(Module, Opts, State, Data, Server, Actions) ->
 %%---------------------------------------------------------------------------
 %% API helpers
 
+-compile({inline, [wrap_cast/1]}).
 wrap_cast(Event) ->
     {'$gen_cast',Event}.
 
+call_dirty(ServerRef, Request, Timeout, T) ->
+    try gen:call(ServerRef, '$gen_call', Request, T) of
+        {ok,Reply} ->
+            Reply
+    catch
+        Class:Reason:Stacktrace ->
+            erlang:raise(
+              Class,
+              {Reason,{?MODULE,call,[ServerRef,Request,Timeout]}},
+              Stacktrace)
+    end.
+
+call_clean(ServerRef, Request, Timeout, T) ->
+    %% Call server through proxy process to dodge any late reply
+    Ref = make_ref(),
+    Self = self(),
+    Pid = spawn(
+            fun () ->
+                    Self !
+                        try gen:call(
+                              ServerRef, '$gen_call', Request, T) of
+                            Result ->
+                                {Ref,Result}
+                        catch Class:Reason:Stacktrace ->
+                                {Ref,Class,Reason,Stacktrace}
+                        end
+            end),
+    Mref = monitor(process, Pid),
+    receive
+        {Ref,Result} ->
+            demonitor(Mref, [flush]),
+            case Result of
+                {ok,Reply} ->
+                    Reply
+            end;
+        {Ref,Class,Reason,Stacktrace} ->
+            demonitor(Mref, [flush]),
+            erlang:raise(
+              Class,
+              {Reason,{?MODULE,call,[ServerRef,Request,Timeout]}},
+              Stacktrace);
+        {'DOWN',Mref,_,_,Reason} ->
+            %% There is a theoretical possibility that the
+            %% proxy process gets killed between try--of and !
+            %% so this clause is in case of that
+            exit(Reason)
+    end.
+
 replies([{reply,From,Reply}|Replies]) ->
     reply(From, Reply),
     replies(Replies);
@@ -590,76 +641,39 @@ replies([]) ->
 
 %% Might actually not send the message in case of caught exception
 send(Proc, Msg) ->
-    try erlang:send(Proc, Msg, [noconnect]) of
-	noconnect ->
-	    _ = spawn(erlang, send, [Proc,Msg]),
-	    ok;
-	ok ->
-	    ok
+    try erlang:send(Proc, Msg)
     catch
-	_:_ ->
-	    ok
-    end.
+        error:_ -> ok
+    end,
+    ok.
 
 %% Here the init_it/6 and enter_loop/5,6,7 functions converge
 enter(Module, Opts, State, Data, Server, Actions, Parent) ->
     %% The values should already have been type checked
     Name = gen:get_proc_name(Server),
     Debug = gen:debug_options(Name, Opts),
-	HibernateAfterTimeout = gen:hibernate_after(Opts),
-	Events = [],
-    P = [],
+    HibernateAfterTimeout = gen:hibernate_after(Opts),
+    Events = [],
     Event = {internal,init_state},
     %% We enforce {postpone,false} to ensure that
     %% our fake Event gets discarded, thought it might get logged
-    NewActions =
-	if
-	    is_list(Actions) ->
-		Actions ++ [{postpone,false}];
-	    true ->
-		[Actions,{postpone,false}]
-	end,
-    TimerRefs = #{},
-    %% Key: timer ref
-    %% Value: the timer type i.e the timer's event type
-    %%
-    TimerTypes = #{},
-    %% Key: timer type i.e the timer's event type
-    %% Value: timer ref
-    %%
-    %% We add a timer to both timer_refs and timer_types
-    %% when we start it.  When we request an asynchronous
-    %% timer cancel we remove it from timer_types.  When
-    %% the timer cancel message arrives we remove it from
-    %% timer_refs.
-    %%
-    Hibernate = false,
-    CancelTimers = 0,
-    S =	#{
-      callback_mode => undefined,
-      state_enter => false,
-      module => Module,
-      name => Name,
-      state => State,
-      data => Data,
-      postponed => P,
-      %%
-      %% The following fields are finally set from to the arguments to
-      %% loop_event_actions/9 when it finally loops back to loop/3
-      %% in loop_event_result/11
-      timer_refs => TimerRefs,
-      timer_types => TimerTypes,
-      hibernate => Hibernate,
-	  hibernate_after => HibernateAfterTimeout,
-      cancel_timers => CancelTimers
-     },
-    NewDebug = sys_debug(Debug, S, State, {enter,Event,State}),
+    NewActions = listify(Actions) ++ [{postpone,false}],
+    S =
+        #state{
+           module = Module,
+           name = Name,
+           state = State,
+           data = Data,
+           hibernate_after = HibernateAfterTimeout},
+    CallEnter = true,
+    NewDebug = ?sys_debug(Debug, {Name,State}, {enter,Event,State}),
     case call_callback_mode(S) of
-	{ok,NewS} ->
-	    loop_event_actions(
+	#state{} = NewS ->
+	    loop_event_actions_list(
 	      Parent, NewDebug, NewS,
-	      Events, Event, State, Data, NewActions, true);
-	{Class,Reason,Stacktrace} ->
+	      Events, Event, State, Data, false,
+              NewActions, CallEnter);
+	[Class,Reason,Stacktrace] ->
 	    terminate(
 	      Class, Reason, Stacktrace, NewDebug,
 	      S, [Event|Events])
@@ -677,17 +691,14 @@ init_it(Starter, Parent, ServerRef, Module, Args, Opts) ->
     catch
 	Result ->
 	    init_result(Starter, Parent, ServerRef, Module, Result, Opts);
-	Class:Reason ->
-	    Stacktrace = erlang:get_stacktrace(),
+	Class:Reason:Stacktrace ->
 	    Name = gen:get_proc_name(ServerRef),
 	    gen:unregister_name(ServerRef),
 	    proc_lib:init_ack(Starter, {error,Reason}),
 	    error_info(
 	      Class, Reason, Stacktrace,
-	      #{name => Name,
-		callback_mode => undefined,
-		state_enter => false},
-	      [], [], undefined),
+	      #state{name = Name},
+	      [], undefined),
 	    erlang:raise(Class, Reason, Stacktrace)
     end.
 
@@ -717,10 +728,8 @@ init_result(Starter, Parent, ServerRef, Module, Result, Opts) ->
 	    proc_lib:init_ack(Starter, {error,Error}),
 	    error_info(
 	      error, Error, ?STACKTRACE(),
-	      #{name => Name,
-		callback_mode => undefined,
-		state_enter => false},
-	      [], [], undefined),
+	      #state{name = Name},
+	      [], undefined),
 	    exit(Error)
     end.
 
@@ -734,9 +743,10 @@ system_terminate(Reason, _Parent, Debug, S) ->
     terminate(exit, Reason, ?STACKTRACE(), Debug, S, []).
 
 system_code_change(
-  #{module := Module,
-    state := State,
-    data := Data} = S,
+  #state{
+     module = Module,
+     state = State,
+     data = Data} = S,
   _Mod, OldVsn, Extra) ->
     case
 	try Module:code_change(OldVsn, State, Data, Extra)
@@ -746,29 +756,31 @@ system_code_change(
     of
 	{ok,NewState,NewData} ->
 	    {ok,
-	     S#{callback_mode := undefined,
-		state := NewState,
-		data := NewData}};
+	     S#state{
+               callback_mode = undefined,
+               state = NewState,
+               data = NewData}};
 	{ok,_} = Error ->
 	    error({case_clause,Error});
 	Error ->
 	    Error
     end.
 
-system_get_state(#{state := State, data := Data}) ->
+system_get_state(#state{state = State, data = Data}) ->
     {ok,{State,Data}}.
 
 system_replace_state(
   StateFun,
-  #{state := State,
-    data := Data} = S) ->
+  #state{
+     state = State,
+     data = Data} = S) ->
     {NewState,NewData} = Result = StateFun({State,Data}),
-    {ok,Result,S#{state := NewState, data := NewData}}.
+    {ok,Result,S#state{state = NewState, data = NewData}}.
 
 format_status(
   Opt,
   [PDict,SysState,Parent,Debug,
-   #{name := Name, postponed := P} = S]) ->
+   #state{name = Name, postponed = P} = S]) ->
     Header = gen:format_status_header("Status for state machine", Name),
     Log = sys:get_debug(log, Debug, []),
     [{header,Header},
@@ -787,6 +799,9 @@ format_status(
 %% them, not as the real erlang messages.  Use trace for that.
 %%---------------------------------------------------------------------------
 
+sys_debug(Debug, NameState, Entry) ->
+  sys:handle_debug(Debug, fun print_event/3, NameState, Entry).
+
 print_event(Dev, {in,Event}, {Name,State}) ->
     io:format(
       Dev, "*DBG* ~tp receive ~ts in state ~tp~n",
@@ -819,15 +834,6 @@ event_string(Event) ->
 	    io_lib:format("~tw ~tp", [EventType,EventContent])
     end.
 
-sys_debug(Debug, #{name := Name}, State, Entry) ->
-    case Debug of
-	[] ->
-	    Debug;
-	_ ->
-	    sys:handle_debug(
-	      Debug, fun print_event/3, {Name,State}, Entry)
-    end.
-
 %%%==========================================================================
 %%% Internal callbacks
 
@@ -842,14 +848,16 @@ wakeup_from_hibernate(Parent, Debug, S) ->
 %% and detours through sys:handle_system_message/7 and proc_lib:hibernate/3
 
 %% Entry point for system_continue/3
-loop(Parent, Debug, #{hibernate := true, cancel_timers := 0} = S) ->
+loop(Parent, Debug, #state{hibernate = true, cancel_timers = 0} = S) ->
     loop_hibernate(Parent, Debug, S);
 loop(Parent, Debug, S) ->
     loop_receive(Parent, Debug, S).
 
 loop_hibernate(Parent, Debug, S) ->
+    %%
     %% Does not return but restarts process at
     %% wakeup_from_hibernate/3 that jumps to loop_receive/3
+    %%
     proc_lib:hibernate(
       ?MODULE, wakeup_from_hibernate, [Parent,Debug,S]),
     error(
@@ -857,17 +865,18 @@ loop_hibernate(Parent, Debug, S) ->
        {wakeup_from_hibernate,3}}).
 
 %% Entry point for wakeup_from_hibernate/3
-loop_receive(Parent, Debug, #{hibernate_after := HibernateAfterTimeout} = S) ->
+loop_receive(
+  Parent, Debug, #state{hibernate_after = HibernateAfterTimeout} = S) ->
+    %%
     receive
 	Msg ->
 	    case Msg of
 		{system,Pid,Req} ->
-		    #{hibernate := Hibernate} = S,
 		    %% Does not return but tail recursively calls
 		    %% system_continue/3 that jumps to loop/3
 		    sys:handle_system_msg(
 		      Req, Pid, Parent, ?MODULE, Debug, S,
-		      Hibernate);
+		      S#state.hibernate);
 		{'EXIT',Parent,Reason} = EXIT ->
 		    %% EXIT is not a 2-tuple therefore
 		    %% not an event but this will stand out
@@ -875,9 +884,9 @@ loop_receive(Parent, Debug, #{hibernate_after := HibernateAfterTimeout} = S) ->
 		    Q = [EXIT],
 		    terminate(exit, Reason, ?STACKTRACE(), Debug, S, Q);
 		{timeout,TimerRef,TimerMsg} ->
-		    #{timer_refs := TimerRefs,
-		      timer_types := TimerTypes,
-		      hibernate := Hibernate} = S,
+		    #state{
+                       timer_refs = TimerRefs,
+                       timer_types = TimerTypes} = S,
 		    case TimerRefs of
 			#{TimerRef := TimerType} ->
 			    %% We know of this timer; is it a running
@@ -887,7 +896,6 @@ loop_receive(Parent, Debug, #{hibernate_after := HibernateAfterTimeout} = S) ->
 				#{TimerType := TimerRef} ->
 				    %% The timer type maps back to this
 				    %% timer ref, so it was a running timer
-				    Event = {TimerType,TimerMsg},
 				    %% Unregister the triggered timeout
 				    NewTimerRefs =
 					maps:remove(TimerRef, TimerRefs),
@@ -895,11 +903,10 @@ loop_receive(Parent, Debug, #{hibernate_after := HibernateAfterTimeout} = S) ->
 					maps:remove(TimerType, TimerTypes),
 				    loop_receive_result(
 				      Parent, Debug,
-				      S#{
-					timer_refs := NewTimerRefs,
-					timer_types := NewTimerTypes},
-				      Hibernate,
-				      Event);
+				      S#state{
+					timer_refs = NewTimerRefs,
+					timer_types = NewTimerTypes},
+				      TimerType, TimerMsg);
 				_ ->
 				    %% This was a late timeout message
 				    %% from timer being cancelled, so
@@ -909,14 +916,13 @@ loop_receive(Parent, Debug, #{hibernate_after := HibernateAfterTimeout} = S) ->
 			    end;
 			_ ->
 			    %% Not our timer; present it as an event
-			    Event = {info,Msg},
-			    loop_receive_result(
-			      Parent, Debug, S, Hibernate, Event)
+			    loop_receive_result(Parent, Debug, S, info, Msg)
 		    end;
 		{cancel_timer,TimerRef,_} ->
-		    #{timer_refs := TimerRefs,
-		      cancel_timers := CancelTimers,
-		      hibernate := Hibernate} = S,
+		    #state{
+                       timer_refs = TimerRefs,
+                       cancel_timers = CancelTimers,
+                       hibernate = Hibernate} = S,
 		    case TimerRefs of
 			#{TimerRef := _} ->
 			    %% We must have requested a cancel
@@ -926,9 +932,9 @@ loop_receive(Parent, Debug, #{hibernate_after := HibernateAfterTimeout} = S) ->
 				maps:remove(TimerRef, TimerRefs),
 			    NewCancelTimers = CancelTimers - 1,
 			    NewS =
-				S#{
-				  timer_refs := NewTimerRefs,
-				  cancel_timers := NewCancelTimers},
+				S#state{
+				  timer_refs = NewTimerRefs,
+				  cancel_timers = NewCancelTimers},
 			    if
 				Hibernate =:= true, NewCancelTimers =:= 0 ->
 				    %% No more cancel_timer msgs to expect;
@@ -940,297 +946,677 @@ loop_receive(Parent, Debug, #{hibernate_after := HibernateAfterTimeout} = S) ->
 			_ ->
 			    %% Not our cancel_timer msg;
 			    %% present it as an event
-			    Event = {info,Msg},
-			    loop_receive_result(
-			      Parent, Debug, S, Hibernate, Event)
+			    loop_receive_result(Parent, Debug, S, info, Msg)
 		    end;
 		_ ->
 		    %% External msg
-		    #{hibernate := Hibernate} = S,
-		    Event =
-			case Msg of
-			    {'$gen_call',From,Request} ->
-				{{call,From},Request};
-			    {'$gen_cast',E} ->
-				{cast,E};
-			    _ ->
-				{info,Msg}
-			end,
-		    loop_receive_result(
-		      Parent, Debug, S, Hibernate, Event)
+                    case Msg of
+                        {'$gen_call',From,Request} ->
+                            loop_receive_result(
+                              Parent, Debug, S, {call,From}, Request);
+                        {'$gen_cast',Cast} ->
+                            loop_receive_result(Parent, Debug, S, cast, Cast);
+                        _ ->
+                            loop_receive_result(Parent, Debug, S, info, Msg)
+                    end
 	    end
     after
 	    HibernateAfterTimeout ->
 		    loop_hibernate(Parent, Debug, S)
     end.
 
+loop_receive_result(Parent, ?not_sys_debug, S, Type, Content) ->
+    %% Here is the queue of not yet handled events created
+    Events = [],
+    loop_event(Parent, ?not_sys_debug, S, Events, Type, Content);
 loop_receive_result(
-  Parent, Debug,
-  #{state := State,
-    timer_types := TimerTypes, cancel_timers := CancelTimers} = S,
-  Hibernate, Event) ->
-    %% From now the 'hibernate' field in S is invalid
-    %% and will be restored when looping back
-    %% in loop_event_result/11
-    NewDebug = sys_debug(Debug, S, State, {in,Event}),
+  Parent, Debug, #state{name = Name, state = State} = S, Type, Content) ->
+    NewDebug = sys_debug(Debug, {Name,State}, {in,{Type,Content}}),
     %% Here is the queue of not yet handled events created
     Events = [],
-    %% Cancel any running event timer
-    case
-	cancel_timer_by_type(timeout, TimerTypes, CancelTimers)
-    of
-	{_,CancelTimers} ->
-	    %% No timer cancelled
-	    loop_event(Parent, NewDebug, S, Events, Event, Hibernate);
-	{NewTimerTypes,NewCancelTimers} ->
-	    %% The timer is removed from NewTimerTypes but
-	    %% remains in TimerRefs until we get
-	    %% the cancel_timer msg
-	    NewS =
-		S#{
-		  timer_types := NewTimerTypes,
-		  cancel_timers := NewCancelTimers},
-	    loop_event(Parent, NewDebug, NewS, Events, Event, Hibernate)
-    end.
+    loop_event(Parent, NewDebug, S, Events, Type, Content).
 
 %% Entry point for handling an event, received or enqueued
 loop_event(
+  Parent, Debug, #state{hibernate = Hibernate} = S,
+  Events, Type, Content) ->
+    %%
+    case Hibernate of
+        true ->
+            %%
+            %% If (this old) Hibernate is true here it can only be
+            %% because it was set from an event action
+            %% and we did not go into hibernation since there were
+            %% events in queue, so we do what the user
+            %% might rely on i.e collect garbage which
+            %% would have happened if we actually hibernated
+            %% and immediately was awakened.
+            %%
+            _ = garbage_collect(),
+            loop_event_state_function(
+              Parent, Debug, S, Events, Type, Content);
+        false ->
+            loop_event_state_function(
+              Parent, Debug, S, Events, Type, Content)
+    end.
+
+%% Call the state function
+loop_event_state_function(
   Parent, Debug,
-  #{state := State, data := Data} = S,
-  Events, {Type,Content} = Event, Hibernate) ->
+  #state{state = State, data = Data} = S,
+  Events, Type, Content) ->
+    %%
+    %% The field 'hibernate' in S is now invalid and will be
+    %% restored when looping back to loop/3 or loop_event/6.
     %%
-    %% If (this old) Hibernate is true here it can only be
-    %% because it was set from an event action
-    %% and we did not go into hibernation since there were
-    %% events in queue, so we do what the user
-    %% might rely on i.e collect garbage which
-    %% would have happened if we actually hibernated
-    %% and immediately was awakened
-    Hibernate andalso garbage_collect(),
+    Event = {Type,Content},
+    TransOpts = false,
     case call_state_function(S, Type, Content, State, Data) of
-	{ok,Result,NewS} ->
-	    {NextState,NewData,Actions,EnterCall} =
-		parse_event_result(
-		  true, Debug, NewS,
-		  Events, Event, State, Data, Result),
-	    loop_event_actions(
-	      Parent, Debug, NewS,
-	      Events, Event, NextState, NewData, Actions, EnterCall);
-	{Class,Reason,Stacktrace} ->
+        {Result, NewS} ->
+            loop_event_result(
+              Parent, Debug, NewS,
+              Events, Event, State, Data, TransOpts, Result);
+	[Class,Reason,Stacktrace] ->
 	    terminate(
-	      Class, Reason, Stacktrace, Debug, S,
-	      [Event|Events])
+	      Class, Reason, Stacktrace, Debug, S, [Event|Events])
     end.
 
-loop_event_actions(
-  Parent, Debug,
-  #{state := State, state_enter := StateEnter} = S,
-  Events, Event, NextState, NewData,
-  Actions, EnterCall) ->
-    %% Hibernate is reborn here as false being
-    %% the default value from parse_actions/4
-    case parse_actions(Debug, S, State, Actions) of
-	{ok,NewDebug,Hibernate,TimeoutsR,Postpone,NextEventsR} ->
-	    if
-		StateEnter, EnterCall ->
-		    loop_event_enter(
-		      Parent, NewDebug, S,
-		      Events, Event, NextState, NewData,
-		      Hibernate, TimeoutsR, Postpone, NextEventsR);
-		true ->
-		    loop_event_result(
-		      Parent, NewDebug, S,
-		      Events, Event, NextState, NewData,
-		      Hibernate, TimeoutsR, Postpone, NextEventsR)
-	    end;
-	{Class,Reason,Stacktrace} ->
+%% Make a state enter call to the state function
+loop_event_state_enter(
+  Parent, Debug, #state{state = PrevState} = S,
+  Events, Event, NextState, NewData, TransOpts) ->
+    %%
+    case call_state_function(S, enter, PrevState, NextState, NewData) of
+        {Result, NewS} ->
+            loop_event_result(
+              Parent, Debug, NewS,
+              Events, Event, NextState, NewData, TransOpts, Result);
+	[Class,Reason,Stacktrace] ->
 	    terminate(
-	      Class, Reason, Stacktrace, Debug, S,
-	      [Event|Events])
+	      Class, Reason, Stacktrace, Debug, S, [Event|Events])
     end.
 
-loop_event_enter(
-  Parent, Debug, #{state := State} = S,
-  Events, Event, NextState, NewData,
-  Hibernate, TimeoutsR, Postpone, NextEventsR) ->
-    case call_state_function(S, enter, State, NextState, NewData) of
-	{ok,Result,NewS} ->
-	    case parse_event_result(
-		   false, Debug, NewS,
-		   Events, Event, NextState, NewData, Result) of
-		{_,NewerData,Actions,EnterCall} ->
-		    loop_event_enter_actions(
-		      Parent, Debug, NewS,
-		      Events, Event, NextState, NewerData,
-		      Hibernate, TimeoutsR, Postpone, NextEventsR,
-		      Actions, EnterCall)
-	    end;
-	{Class,Reason,Stacktrace} ->
-	    terminate(
-	      Class, Reason, Stacktrace, Debug,
-	      S#{
-		state := NextState,
-		data := NewData,
-		hibernate := Hibernate},
-	      [Event|Events])
+%% Process the result from the state function.
+%% When TransOpts =:= false it was a state function call,
+%% otherwise it is an option tuple and it was a state enter call.
+%%
+loop_event_result(
+  Parent, Debug, S,
+  Events, Event, State, Data, TransOpts, Result) ->
+    %%
+    case Result of
+	{next_state,State,NewData} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, NewData, TransOpts,
+              [], false);
+	{next_state,NextState,NewData}
+          when TransOpts =:= false ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, NextState, NewData, TransOpts,
+              [], true);
+	{next_state,State,NewData,Actions} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, NewData, TransOpts,
+              Actions, false);
+	{next_state,NextState,NewData,Actions}
+          when TransOpts =:= false ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, NextState, NewData, TransOpts,
+              Actions, true);
+        %%
+        {keep_state,NewData} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, NewData, TransOpts,
+              [], false);
+        {keep_state,NewData,Actions} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, NewData, TransOpts,
+              Actions, false);
+        %%
+        keep_state_and_data ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, Data, TransOpts,
+              [], false);
+        {keep_state_and_data,Actions} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, Data, TransOpts,
+              Actions, false);
+        %%
+        {repeat_state,NewData} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, NewData, TransOpts,
+              [], true);
+        {repeat_state,NewData,Actions} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, NewData, TransOpts,
+              Actions, true);
+        %%
+        repeat_state_and_data ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, Data, TransOpts,
+              [], true);
+        {repeat_state_and_data,Actions} ->
+            loop_event_actions(
+              Parent, Debug, S,
+              Events, Event, State, Data, TransOpts,
+              Actions, true);
+        %%
+	stop ->
+            terminate(
+              exit, normal, ?STACKTRACE(), Debug,
+              S#state{
+                state = State, data = Data,
+                hibernate = hibernate_in_trans_opts(TransOpts)},
+              [Event|Events]);
+	{stop,Reason} ->
+            terminate(
+              exit, Reason, ?STACKTRACE(), Debug,
+              S#state{
+                state = State, data = Data,
+                hibernate = hibernate_in_trans_opts(TransOpts)},
+              [Event|Events]);
+	{stop,Reason,NewData} ->
+            terminate(
+              exit, Reason, ?STACKTRACE(), Debug,
+              S#state{
+                state = State, data = NewData,
+                hibernate = hibernate_in_trans_opts(TransOpts)},
+              [Event|Events]);
+	%%
+	{stop_and_reply,Reason,Replies} ->
+            reply_then_terminate(
+              exit, Reason, ?STACKTRACE(), Debug,
+              S#state{
+                state = State, data = Data,
+                hibernate = hibernate_in_trans_opts(TransOpts)},
+              [Event|Events], Replies);
+	{stop_and_reply,Reason,Replies,NewData} ->
+            reply_then_terminate(
+              exit, Reason, ?STACKTRACE(), Debug,
+              S#state{
+                state = State, data = NewData,
+                hibernate = hibernate_in_trans_opts(TransOpts)},
+              [Event|Events], Replies);
+	%%
+	_ ->
+            terminate(
+              error,
+              {bad_return_from_state_function,Result},
+              ?STACKTRACE(), Debug,
+              S#state{
+                state = State, data = Data,
+                hibernate = hibernate_in_trans_opts(TransOpts)},
+              [Event|Events])
     end.
 
-loop_event_enter_actions(
-  Parent, Debug, #{state_enter := StateEnter} = S,
-  Events, Event, NextState, NewData,
-  Hibernate, TimeoutsR, Postpone, NextEventsR,
-  Actions, EnterCall) ->
-    case
-	parse_enter_actions(
-	  Debug, S, NextState, Actions, Hibernate, TimeoutsR)
-    of
-	{ok,NewDebug,NewHibernate,NewTimeoutsR,_,_} ->
-	    if
-		StateEnter, EnterCall ->
-		    loop_event_enter(
-		      Parent, NewDebug, S,
-		      Events, Event, NextState, NewData,
-		      NewHibernate, NewTimeoutsR, Postpone, NextEventsR);
-		true ->
-		    loop_event_result(
-		      Parent, NewDebug, S,
-		      Events, Event, NextState, NewData,
-		      NewHibernate, NewTimeoutsR, Postpone, NextEventsR)
-	    end;
-	{Class,Reason,Stacktrace} ->
-	    terminate(
-	      Class, Reason, Stacktrace, Debug,
-	      S#{
-		state := NextState,
-		data := NewData,
-		hibernate := Hibernate},
-	      [Event|Events])
+-compile({inline, [hibernate_in_trans_opts/1]}).
+hibernate_in_trans_opts(false) ->
+    (#trans_opts{})#trans_opts.hibernate;
+hibernate_in_trans_opts(#trans_opts{hibernate = Hibernate}) ->
+    Hibernate.
+
+%% Ensure that Actions are a list
+loop_event_actions(
+  Parent, Debug, S,
+  Events, Event, NextState, NewerData, TransOpts,
+  Actions, CallEnter) ->
+    loop_event_actions_list(
+      Parent, Debug, S,
+      Events, Event, NextState, NewerData, TransOpts,
+      listify(Actions), CallEnter).
+
+%% Process actions from the state function
+loop_event_actions_list(
+  Parent, Debug, #state{state_enter = StateEnter} = S,
+  Events, Event, NextState, NewerData, TransOpts,
+  Actions, CallEnter) ->
+    %%
+    case parse_actions(TransOpts, Debug, S, Actions) of
+        {NewDebug,NewTransOpts}
+          when StateEnter, CallEnter ->
+            loop_event_state_enter(
+              Parent, NewDebug, S,
+              Events, Event, NextState, NewerData, NewTransOpts);
+        {NewDebug,NewTransOpts} ->
+            loop_event_done(
+              Parent, NewDebug, S,
+              Events, Event, NextState, NewerData, NewTransOpts);
+        [Class,Reason,Stacktrace,NewDebug] ->
+            terminate(
+              Class, Reason, Stacktrace, NewDebug,
+              S#state{
+                state = NextState,
+                data = NewerData,
+                hibernate = TransOpts#trans_opts.hibernate},
+              [Event|Events])
     end.
 
-loop_event_result(
+parse_actions(false, Debug, S, Actions) ->
+    parse_actions(true, Debug, S, Actions, #trans_opts{});
+parse_actions(TransOpts, Debug, S, Actions) ->
+    parse_actions(false, Debug, S, Actions, TransOpts).
+%%
+parse_actions(_StateCall, Debug, _S, [], TransOpts) ->
+    {Debug,TransOpts};
+parse_actions(StateCall, Debug, S, [Action|Actions], TransOpts) ->
+    case Action of
+	%% Actual actions
+	{reply,From,Reply} ->
+            parse_actions_reply(
+              StateCall, Debug, S, Actions, TransOpts, From, Reply);
+	%%
+	%% Actions that set options
+	{hibernate,NewHibernate} when is_boolean(NewHibernate) ->
+            parse_actions(
+              StateCall, Debug, S, Actions,
+              TransOpts#trans_opts{hibernate = NewHibernate});
+	hibernate ->
+            parse_actions(
+              StateCall, Debug, S, Actions,
+              TransOpts#trans_opts{hibernate = true});
+	%%
+	{postpone,NewPostpone} when not NewPostpone orelse StateCall ->
+            parse_actions(
+              StateCall, Debug, S, Actions,
+              TransOpts#trans_opts{postpone = NewPostpone});
+	postpone when StateCall ->
+            parse_actions(
+              StateCall, Debug, S, Actions,
+              TransOpts#trans_opts{postpone = true});
+	%%
+	{next_event,Type,Content} ->
+            parse_actions_next_event(
+              StateCall, Debug, S, Actions, TransOpts, Type, Content);
+	%%
+        _ ->
+            parse_actions_timeout(
+              StateCall, Debug, S, Actions, TransOpts, Action)
+    end.
+
+parse_actions_reply(
+  StateCall, ?not_sys_debug, S, Actions, TransOpts,
+  From, Reply) ->
+    %%
+    case from(From) of
+        true ->
+            reply(From, Reply),
+            parse_actions(StateCall, ?not_sys_debug, S, Actions, TransOpts);
+        false ->
+            [error,
+             {bad_action_from_state_function,{reply,From,Reply}},
+             ?STACKTRACE(),
+             ?not_sys_debug]
+    end;
+parse_actions_reply(
+  StateCall, Debug, #state{name = Name, state = State} = S,
+  Actions, TransOpts, From, Reply) ->
+    %%
+    case from(From) of
+        true ->
+            reply(From, Reply),
+            NewDebug = sys_debug(Debug, {Name,State}, {out,Reply,From}),
+            parse_actions(StateCall, NewDebug, S, Actions, TransOpts);
+        false ->
+            [error,
+             {bad_action_from_state_function,{reply,From,Reply}},
+             ?STACKTRACE(),
+             Debug]
+    end.
+
+parse_actions_next_event(
+  StateCall, ?not_sys_debug, S,
+  Actions, TransOpts, Type, Content) ->
+    case event_type(Type) of
+        true when StateCall ->
+            NextEventsR = TransOpts#trans_opts.next_events_r,
+            parse_actions(
+              StateCall, ?not_sys_debug, S, Actions,
+              TransOpts#trans_opts{
+                next_events_r = [{Type,Content}|NextEventsR]});
+        _ ->
+            [error,
+             {bad_action_from_state_function,{next_event,Type,Content}},
+             ?STACKTRACE(),
+             ?not_sys_debug]
+    end;
+parse_actions_next_event(
+  StateCall, Debug, #state{name = Name, state = State} = S,
+  Actions, TransOpts, Type, Content) ->
+    case event_type(Type) of
+        true when StateCall ->
+            NewDebug = sys_debug(Debug, {Name,State}, {in,{Type,Content}}),
+            NextEventsR = TransOpts#trans_opts.next_events_r,
+            parse_actions(
+              StateCall, NewDebug, S, Actions,
+              TransOpts#trans_opts{
+                next_events_r = [{Type,Content}|NextEventsR]});
+        _ ->
+            [error,
+             {bad_action_from_state_function,{next_event,Type,Content}},
+             ?STACKTRACE(),
+             Debug]
+    end.
+
+parse_actions_timeout(
+  StateCall, Debug, S, Actions, TransOpts,
+  {TimerType,Time,TimerMsg,TimerOpts} = AbsoluteTimeout) ->
+    %%
+    case classify_timer(Time, listify(TimerOpts)) of
+        absolute ->
+            parse_actions_timeout_add(
+              StateCall, Debug, S, Actions,
+              TransOpts, AbsoluteTimeout);
+        relative ->
+            RelativeTimeout = {TimerType,Time,TimerMsg},
+            parse_actions_timeout_add(
+              StateCall, Debug, S, Actions,
+              TransOpts, RelativeTimeout);
+        badarg ->
+            [error,
+             {bad_action_from_state_function,AbsoluteTimeout},
+             ?STACKTRACE(),
+             Debug]
+    end;
+parse_actions_timeout(
+  StateCall, Debug, S, Actions, TransOpts,
+  {_,Time,_} = RelativeTimeout) ->
+    case classify_timer(Time, []) of
+        relative ->
+            parse_actions_timeout_add(
+              StateCall, Debug, S, Actions,
+              TransOpts, RelativeTimeout);
+        badarg ->
+            [error,
+             {bad_action_from_state_function,RelativeTimeout},
+             ?STACKTRACE(),
+             Debug]
+    end;
+parse_actions_timeout(
+  StateCall, Debug, S, Actions, TransOpts,
+  Timeout) ->
+    case classify_timer(Timeout, []) of
+        relative ->
+            parse_actions_timeout_add(
+              StateCall, Debug, S, Actions, TransOpts, Timeout);
+        badarg ->
+            [error,
+             {bad_action_from_state_function,Timeout},
+             ?STACKTRACE(),
+             Debug]
+    end.
+
+parse_actions_timeout_add(
+  StateCall, Debug, S, Actions,
+  #trans_opts{timeouts_r = TimeoutsR} = TransOpts, Timeout) ->
+    parse_actions(
+      StateCall, Debug, S, Actions,
+      TransOpts#trans_opts{timeouts_r = [Timeout|TimeoutsR]}).
+
+%% Do the state transition
+loop_event_done(
+  Parent, ?not_sys_debug,
+  #state{postponed = P} = S,
+  Events, Event, NextState, NewData,
+  #trans_opts{
+     postpone = Postpone, hibernate = Hibernate,
+     timeouts_r = [], next_events_r = []}) ->
+    %%
+    %% Optimize the simple cases
+    %% i.e no timer changes, no inserted events and no debug,
+    %% by duplicate stripped down code
+    %%
+    %% Fast path
+    %%
+    case Postpone of
+        true ->
+            loop_event_done_fast(
+              Parent, Hibernate,
+              S,
+              Events, [Event|P], NextState, NewData);
+        false ->
+            loop_event_done_fast(
+              Parent, Hibernate,
+              S,
+              Events, P, NextState, NewData)
+    end;
+loop_event_done(
   Parent, Debug_0,
-  #{state := State, postponed := P_0,
-    timer_refs := TimerRefs_0, timer_types := TimerTypes_0,
-    cancel_timers := CancelTimers_0} = S_0,
+  #state{
+     state = State, postponed = P_0,
+     timer_refs = TimerRefs_0, timer_types = TimerTypes_0,
+     cancel_timers = CancelTimers_0} = S,
   Events_0, Event_0, NextState, NewData,
-  Hibernate, TimeoutsR, Postpone, NextEventsR) ->
+  #trans_opts{
+     hibernate = Hibernate, timeouts_r = TimeoutsR,
+     postpone = Postpone, next_events_r = NextEventsR}) ->
     %%
     %% All options have been collected and next_events are buffered.
     %% Do the actual state transition.
     %%
-    {Debug_1,P_1} = % Move current event to postponed if Postpone
+    %% Full feature path
+    %%
+    [Debug_1|P_1] = % Move current event to postponed if Postpone
 	case Postpone of
 	    true ->
-		{sys_debug(Debug_0, S_0, State, {postpone,Event_0,State}),
-		 [Event_0|P_0]};
+		[?sys_debug(
+                    Debug_0,
+                    {S#state.name,State},
+                    {postpone,Event_0,State}),
+		 Event_0|P_0];
 	    false ->
-		{sys_debug(Debug_0, S_0, State, {consume,Event_0,State}),
-		 P_0}
+		[?sys_debug(
+                    Debug_0,
+                    {S#state.name,State},
+                    {consume,Event_0,State})|P_0]
 	end,
-    {Events_1,P_2,{TimerTypes_1,CancelTimers_1}} =
-	%% Move all postponed events to queue and cancel the
-	%% state timeout if the state changes
+    {Events_2,P_2,Timers_2} =
+	%% Move all postponed events to queue,
+        %% cancel the event timer,
+        %% and cancel the state timeout if the state changes
 	if
 	    NextState =:= State ->
-		{Events_0,P_1,{TimerTypes_0,CancelTimers_0}};
+		{Events_0,P_1,
+                 cancel_timer_by_type(
+                   timeout, {TimerTypes_0,CancelTimers_0})};
 	    true ->
 		{lists:reverse(P_1, Events_0),
 		 [],
 		 cancel_timer_by_type(
-		   state_timeout, TimerTypes_0, CancelTimers_0)}
-		    %% The state timer is removed from TimerTypes_1
-		    %% but remains in TimerRefs_0 until we get
+		   state_timeout,
+                   cancel_timer_by_type(
+                     timeout, {TimerTypes_0,CancelTimers_0}))}
+		    %% The state timer is removed from TimerTypes
+		    %% but remains in TimerRefs until we get
 		    %% the cancel_timer msg
 	end,
-    {TimerRefs_2,TimerTypes_2,CancelTimers_2,TimeoutEvents} =
-	%% Stop and start non-event timers
-	parse_timers(TimerRefs_0, TimerTypes_1, CancelTimers_1, TimeoutsR),
+    {TimerRefs_3,{TimerTypes_3,CancelTimers_3},TimeoutEvents} =
+	%% Stop and start timers
+	parse_timers(TimerRefs_0, Timers_2, TimeoutsR),
     %% Place next events last in reversed queue
-    Events_2R = lists:reverse(Events_1, NextEventsR),
-    %% Enqueue immediate timeout events and start event timer
-    Events_3R =	prepend_timeout_events(TimeoutEvents, Events_2R),
-    S_1 =
-	S_0#{
-	  state := NextState,
-	  data := NewData,
-	  postponed := P_2,
-	  timer_refs := TimerRefs_2,
-	  timer_types := TimerTypes_2,
-	  cancel_timers := CancelTimers_2,
-	  hibernate := Hibernate},
-    case lists:reverse(Events_3R) of
-	[] ->
-	    %% Get a new event
-	    loop(Parent, Debug_1, S_1);
-	[Event|Events] ->
+    Events_3R = lists:reverse(Events_2, NextEventsR),
+    %% Enqueue immediate timeout events
+    Events_4R =	prepend_timeout_events(TimeoutEvents, Events_3R),
+    loop_event_done(
+      Parent, Debug_1,
+      S#state{
+        state = NextState,
+        data = NewData,
+        postponed = P_2,
+        timer_refs = TimerRefs_3,
+        timer_types = TimerTypes_3,
+        cancel_timers = CancelTimers_3,
+        hibernate = Hibernate},
+      lists:reverse(Events_4R)).
+
+%% Fast path
+%%
+loop_event_done_fast(
+  Parent, Hibernate,
+  #state{
+     state = NextState,
+     timer_types = #{timeout := _} = TimerTypes,
+     cancel_timers = CancelTimers} = S,
+  Events, P, NextState, NewData) ->
+    %%
+    %% Same state, event timeout active
+    %%
+    loop_event_done_fast(
+      Parent, Hibernate, S,
+      Events, P, NextState, NewData,
+      cancel_timer_by_type(
+        timeout, {TimerTypes,CancelTimers}));
+loop_event_done_fast(
+  Parent, Hibernate,
+  #state{state = NextState} = S,
+  Events, P, NextState, NewData) ->
+    %%
+    %% Same state
+    %%
+    loop_event_done(
+      Parent, ?not_sys_debug,
+      S#state{
+        data = NewData,
+        postponed = P,
+        hibernate = Hibernate},
+      Events);
+loop_event_done_fast(
+  Parent, Hibernate,
+  #state{
+     timer_types = #{timeout := _} = TimerTypes,
+     cancel_timers = CancelTimers} = S,
+  Events, P, NextState, NewData) ->
+    %%
+    %% State change, event timeout active
+    %%
+    loop_event_done_fast(
+      Parent, Hibernate, S,
+      lists:reverse(P, Events), [], NextState, NewData,
+        cancel_timer_by_type(
+          state_timeout,
+          cancel_timer_by_type(
+            timeout, {TimerTypes,CancelTimers})));
+loop_event_done_fast(
+  Parent, Hibernate,
+  #state{
+     timer_types = #{state_timeout := _} = TimerTypes,
+     cancel_timers = CancelTimers} = S,
+  Events, P, NextState, NewData) ->
+    %%
+    %% State change, state timeout active
+    %%
+    loop_event_done_fast(
+      Parent, Hibernate, S,
+      lists:reverse(P, Events), [], NextState, NewData,
+        cancel_timer_by_type(
+          state_timeout,
+          cancel_timer_by_type(
+            timeout, {TimerTypes,CancelTimers})));
+loop_event_done_fast(
+  Parent, Hibernate,
+  #state{} = S,
+  Events, P, NextState, NewData) ->
+    %%
+    %% State change, no timeout to automatically cancel
+    %%
+    loop_event_done(
+      Parent, ?not_sys_debug,
+      S#state{
+        state = NextState,
+        data = NewData,
+        postponed = [],
+        hibernate = Hibernate},
+      lists:reverse(P, Events)).
+%%
+%% Fast path
+%%
+loop_event_done_fast(
+  Parent, Hibernate, S,
+  Events, P, NextState, NewData,
+  {TimerTypes,CancelTimers}) ->
+    %%
+    loop_event_done(
+      Parent, ?not_sys_debug,
+      S#state{
+        state = NextState,
+        data = NewData,
+        postponed = P,
+        timer_types = TimerTypes,
+        cancel_timers = CancelTimers,
+        hibernate = Hibernate},
+      Events).
+
+loop_event_done(Parent, Debug, S, Q) ->
+    case Q of
+        [] ->
+            %% Get a new event
+            loop(Parent, Debug, S);
+        [{Type,Content}|Events] ->
 	    %% Loop until out of enqueued events
-	    loop_event(Parent, Debug_1, S_1, Events, Event, Hibernate)
+	    loop_event(Parent, Debug, S, Events, Type, Content)
     end.
 
 
 %%---------------------------------------------------------------------------
 %% Server loop helpers
 
-call_callback_mode(#{module := Module} = S) ->
+call_callback_mode(#state{module = Module} = S) ->
     try Module:callback_mode() of
 	CallbackMode ->
 	    callback_mode_result(S, CallbackMode)
     catch
 	CallbackMode ->
 	    callback_mode_result(S, CallbackMode);
-	Class:Reason ->
-	    {Class,Reason,erlang:get_stacktrace()}
+	Class:Reason:Stacktrace ->
+	    [Class,Reason,Stacktrace]
     end.
 
 callback_mode_result(S, CallbackMode) ->
-    case
-	parse_callback_mode(
-	  if
-	      is_atom(CallbackMode) ->
-		  [CallbackMode];
-	      true ->
-		  CallbackMode
-	  end, undefined, false)
-    of
-	{undefined,_} ->
-	    {error,
-	     {bad_return_from_callback_mode,CallbackMode},
-	     ?STACKTRACE()};
-	{CBMode,StateEnter} ->
-	    {ok,
-	     S#{
-	       callback_mode := CBMode,
-	       state_enter := StateEnter}}
-    end.
-
-parse_callback_mode([], CBMode, StateEnter) ->
-    {CBMode,StateEnter};
-parse_callback_mode([H|T], CBMode, StateEnter) ->
+    callback_mode_result(
+      S, CallbackMode, listify(CallbackMode), undefined, false).
+%%
+callback_mode_result(_S, CallbackMode, [], undefined, _StateEnter) ->
+    [error,
+     {bad_return_from_callback_mode,CallbackMode},
+     ?STACKTRACE()];
+callback_mode_result(S, _CallbackMode, [], CBMode, StateEnter) ->
+    S#state{callback_mode = CBMode, state_enter = StateEnter};
+callback_mode_result(S, CallbackMode, [H|T], CBMode, StateEnter) ->
     case callback_mode(H) of
 	true ->
-	    parse_callback_mode(T, H, StateEnter);
+            callback_mode_result(S, CallbackMode, T, H, StateEnter);
 	false ->
-	    case H of
-		state_enter ->
-		    parse_callback_mode(T, CBMode, true);
-		_ ->
-		    {undefined,StateEnter}
+	    case state_enter(H) of
+		true ->
+                    callback_mode_result(S, CallbackMode, T, CBMode, true);
+		false ->
+                    [error,
+                     {bad_return_from_callback_mode,CallbackMode},
+                     ?STACKTRACE()]
 	    end
-    end;
-parse_callback_mode(_, _CBMode, StateEnter) ->
-    {undefined,StateEnter}.
+    end.
 
 
 call_state_function(
-  #{callback_mode := undefined} = S, Type, Content, State, Data) ->
+  #state{callback_mode = undefined} = S, Type, Content, State, Data) ->
     case call_callback_mode(S) of
-	{ok,NewS} ->
+	#state{} = NewS ->
 	    call_state_function(NewS, Type, Content, State, Data);
 	Error ->
 	    Error
     end;
 call_state_function(
-  #{callback_mode := CallbackMode, module := Module} = S,
+  #state{callback_mode = CallbackMode, module = Module} = S,
   Type, Content, State, Data) ->
     try
 	case CallbackMode of
@@ -1241,333 +1627,108 @@ call_state_function(
 	end
     of
 	Result ->
-	    {ok,Result,S}
+	    {Result,S}
     catch
 	Result ->
-	    {ok,Result,S};
-	Class:Reason ->
-	    {Class,Reason,erlang:get_stacktrace()}
-    end.
-
-
-%% Interpret all callback return variants
-parse_event_result(
-  AllowStateChange, Debug, S,
-  Events, Event, State, Data, Result) ->
-    case Result of
-	stop ->
-	    terminate(
-	      exit, normal, ?STACKTRACE(), Debug,
-	      S#{state := State, data := Data},
-	      [Event|Events]);
-	{stop,Reason} ->
-	    terminate(
-	      exit, Reason, ?STACKTRACE(), Debug,
-	      S#{state := State, data := Data},
-	      [Event|Events]);
-	{stop,Reason,NewData} ->
-	    terminate(
-	      exit, Reason, ?STACKTRACE(), Debug,
-	      S#{state := State, data := NewData},
-	      [Event|Events]);
-	%%
-	{stop_and_reply,Reason,Replies} ->
-	    reply_then_terminate(
-	      exit, Reason, ?STACKTRACE(), Debug,
-	      S#{state := State, data := Data},
-	      [Event|Events], Replies);
-	{stop_and_reply,Reason,Replies,NewData} ->
-	    reply_then_terminate(
-	      exit, Reason, ?STACKTRACE(), Debug,
-	      S#{state := State, data := NewData},
-	      [Event|Events], Replies);
-	%%
-	{next_state,State,NewData} ->
-	    {State,NewData,[],false};
-	{next_state,NextState,NewData} when AllowStateChange ->
-	    {NextState,NewData,[],true};
-	{next_state,State,NewData,Actions} ->
-	    {State,NewData,Actions,false};
-	{next_state,NextState,NewData,Actions} when AllowStateChange ->
-	    {NextState,NewData,Actions,true};
-	%%
-	{keep_state,NewData} ->
-	    {State,NewData,[],false};
-	{keep_state,NewData,Actions} ->
-	    {State,NewData,Actions,false};
-	keep_state_and_data ->
-	    {State,Data,[],false};
-	{keep_state_and_data,Actions} ->
-	    {State,Data,Actions,false};
-	%%
-	{repeat_state,NewData} ->
-	    {State,NewData,[],true};
-	{repeat_state,NewData,Actions} ->
-	    {State,NewData,Actions,true};
-	repeat_state_and_data ->
-	    {State,Data,[],true};
-	{repeat_state_and_data,Actions} ->
-	    {State,Data,Actions,true};
-	%%
-	_ ->
-	    terminate(
-	      error,
-	      {bad_return_from_state_function,Result},
-	      ?STACKTRACE(), Debug,
-	      S#{state := State, data := Data},
-	      [Event|Events])
+	    {Result,S};
+	Class:Reason:Stacktrace ->
+	    [Class,Reason,Stacktrace]
     end.
 
 
-parse_enter_actions(Debug, S, State, Actions, Hibernate, TimeoutsR) ->
-    Postpone = forbidden,
-    NextEventsR = forbidden,
-    parse_actions(
-      Debug, S, State, listify(Actions),
-      Hibernate, TimeoutsR, Postpone, NextEventsR).
-
-parse_actions(Debug, S, State, Actions) ->
-    Hibernate = false,
-    TimeoutsR = [infinity], %% Will cancel event timer
-    Postpone = false,
-    NextEventsR = [],
-    parse_actions(
-      Debug, S, State, listify(Actions),
-      Hibernate, TimeoutsR, Postpone, NextEventsR).
+%% -> absolute | relative | badarg
+classify_timer(Time, Opts) ->
+    classify_timer(Time, Opts, false).
 %%
-parse_actions(
-  Debug, _S, _State, [],
-  Hibernate, TimeoutsR, Postpone, NextEventsR) ->
-    {ok,Debug,Hibernate,TimeoutsR,Postpone,NextEventsR};
-parse_actions(
-  Debug, S, State, [Action|Actions],
-  Hibernate, TimeoutsR, Postpone, NextEventsR) ->
-    case Action of
-	%% Actual actions
-	{reply,From,Reply} ->
-	    case from(From) of
-		true ->
-		    NewDebug = do_reply(Debug, S, State, From, Reply),
-		    parse_actions(
-		      NewDebug, S, State, Actions,
-		      Hibernate, TimeoutsR, Postpone, NextEventsR);
-		false ->
-		    {error,
-		     {bad_action_from_state_function,Action},
-		     ?STACKTRACE()}
-	    end;
-	%%
-	%% Actions that set options
-	{hibernate,NewHibernate} when is_boolean(NewHibernate) ->
-	    parse_actions(
-	      Debug, S, State, Actions,
-	      NewHibernate, TimeoutsR, Postpone, NextEventsR);
-	hibernate ->
-	    NewHibernate = true,
-	    parse_actions(
-	      Debug, S, State, Actions,
-	      NewHibernate, TimeoutsR, Postpone, NextEventsR);
-	%%
-	{postpone,NewPostpone}
-	  when is_boolean(NewPostpone), Postpone =/= forbidden ->
-	    parse_actions(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, NewPostpone, NextEventsR);
-	postpone when Postpone =/= forbidden ->
-	    NewPostpone = true,
-	    parse_actions(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, NewPostpone, NextEventsR);
-	%%
-	{next_event,Type,Content} ->
-	    case event_type(Type) of
-		true when NextEventsR =/= forbidden ->
-		    NewDebug =
-			sys_debug(Debug, S, State, {in,{Type,Content}}),
-		    parse_actions(
-		      NewDebug, S, State, Actions,
-		      Hibernate, TimeoutsR, Postpone,
-		      [{Type,Content}|NextEventsR]);
-		_ ->
-		    {error,
-		     {bad_action_from_state_function,Action},
-		     ?STACKTRACE()}
-	    end;
-	%%
-	{{timeout,_},_,_} = Timeout ->
-	    parse_actions_timeout(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, Postpone, NextEventsR, Timeout);
-	{{timeout,_},_,_,_} = Timeout ->
-	    parse_actions_timeout(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, Postpone, NextEventsR, Timeout);
-	{timeout,_,_} = Timeout ->
-	    parse_actions_timeout(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, Postpone, NextEventsR, Timeout);
-	{timeout,_,_,_} = Timeout ->
-	    parse_actions_timeout(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, Postpone, NextEventsR, Timeout);
-	{state_timeout,_,_} = Timeout ->
-	    parse_actions_timeout(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, Postpone, NextEventsR, Timeout);
-	{state_timeout,_,_,_} = Timeout ->
-	    parse_actions_timeout(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, Postpone, NextEventsR, Timeout);
-	Time ->
-	    parse_actions_timeout(
-	      Debug, S, State, Actions,
-	      Hibernate, TimeoutsR, Postpone, NextEventsR, Time)
-    end.
-
-parse_actions_timeout(
-  Debug, S, State, Actions,
-  Hibernate, TimeoutsR, Postpone, NextEventsR, Timeout) ->
-    case Timeout of
-	{TimerType,Time,TimerMsg,TimerOpts} ->
-	    case validate_timer_args(Time, listify(TimerOpts)) of
-		true ->
-		    parse_actions(
-		      Debug, S, State, Actions,
-		      Hibernate, [Timeout|TimeoutsR],
-		      Postpone, NextEventsR);
-		false ->
-		    NewTimeout = {TimerType,Time,TimerMsg},
-		    parse_actions(
-		      Debug, S, State, Actions,
-		      Hibernate, [NewTimeout|TimeoutsR],
-		      Postpone, NextEventsR);
-		error ->
-		    {error,
-		     {bad_action_from_state_function,Timeout},
-		     ?STACKTRACE()}
-	    end;
-	{_,Time,_} ->
-	    case validate_timer_args(Time, []) of
-		false ->
-		    parse_actions(
-		      Debug, S, State, Actions,
-		      Hibernate, [Timeout|TimeoutsR],
-		      Postpone, NextEventsR);
-		error ->
-		    {error,
-		     {bad_action_from_state_function,Timeout},
-		     ?STACKTRACE()}
-	    end;
-	Time ->
-	    case validate_timer_args(Time, []) of
-		false ->
-		    parse_actions(
-		      Debug, S, State, Actions,
-		      Hibernate, [Timeout|TimeoutsR],
-		      Postpone, NextEventsR);
-		error ->
-		    {error,
-		     {bad_action_from_state_function,Timeout},
-		     ?STACKTRACE()}
-	    end
-    end.
-
-validate_timer_args(Time, Opts) ->
-    validate_timer_args(Time, Opts, false).
-%%
-validate_timer_args(Time, [], true) when is_integer(Time) ->
-    true;
-validate_timer_args(Time, [], false) when is_integer(Time), Time >= 0 ->
-    false;
-validate_timer_args(infinity, [], Abs) ->
-    Abs;
-validate_timer_args(Time, [{abs,Abs}|Opts], _) when is_boolean(Abs) ->
-    validate_timer_args(Time, Opts, Abs);
-validate_timer_args(_, [_|_], _) ->
-    error.
+classify_timer(Time, [], Abs) ->
+    case Abs of
+        true when
+              is_integer(Time);
+              Time =:= infinity ->
+            absolute;
+        false when
+              is_integer(Time), 0 =< Time;
+              Time =:= infinity ->
+            relative;
+        _ ->
+            badarg
+    end;
+classify_timer(Time, [{abs,Abs}|Opts], _) when is_boolean(Abs) ->
+    classify_timer(Time, Opts, Abs);
+classify_timer(_, Opts, _) when is_list(Opts) ->
+    badarg.
 
 %% Stop and start timers as well as create timeout zero events
 %% and pending event timer
 %%
 %% Stop and start timers non-event timers
-parse_timers(TimerRefs, TimerTypes, CancelTimers, TimeoutsR) ->
-    parse_timers(TimerRefs, TimerTypes, CancelTimers, TimeoutsR, #{}, []).
+parse_timers(TimerRefs, Timers, TimeoutsR) ->
+    parse_timers(TimerRefs, Timers, TimeoutsR, #{}, []).
 %%
 parse_timers(
-  TimerRefs, TimerTypes, CancelTimers, [], _Seen, TimeoutEvents) ->
-    {TimerRefs,TimerTypes,CancelTimers,TimeoutEvents};
+  TimerRefs, Timers, [], _Seen, TimeoutEvents) ->
+    %%
+    {TimerRefs,Timers,TimeoutEvents};
 parse_timers(
-  TimerRefs, TimerTypes, CancelTimers, [Timeout|TimeoutsR],
-  Seen, TimeoutEvents) ->
+  TimerRefs, Timers, [Timeout|TimeoutsR], Seen, TimeoutEvents) ->
+    %%
     case Timeout of
 	{TimerType,Time,TimerMsg,TimerOpts} ->
 	    %% Absolute timer
 	    parse_timers(
-	      TimerRefs, TimerTypes, CancelTimers, TimeoutsR,
-	      Seen, TimeoutEvents,
+	      TimerRefs, Timers, TimeoutsR, Seen, TimeoutEvents,
 	      TimerType, Time, TimerMsg, listify(TimerOpts));
 	%% Relative timers below
 	{TimerType,0,TimerMsg} ->
 	    parse_timers(
-	      TimerRefs, TimerTypes, CancelTimers, TimeoutsR,
-	      Seen, TimeoutEvents,
+	      TimerRefs, Timers, TimeoutsR, Seen, TimeoutEvents,
 	      TimerType, zero, TimerMsg, []);
 	{TimerType,Time,TimerMsg} ->
 	    parse_timers(
-	      TimerRefs, TimerTypes, CancelTimers, TimeoutsR,
-	      Seen, TimeoutEvents,
+	      TimerRefs, Timers, TimeoutsR, Seen, TimeoutEvents,
 	      TimerType, Time, TimerMsg, []);
 	0 ->
 	    parse_timers(
-	      TimerRefs, TimerTypes, CancelTimers, TimeoutsR,
-	      Seen, TimeoutEvents,
+	      TimerRefs, Timers, TimeoutsR, Seen, TimeoutEvents,
 	      timeout, zero, 0, []);
 	Time ->
 	    parse_timers(
-	      TimerRefs, TimerTypes, CancelTimers, TimeoutsR,
-	      Seen, TimeoutEvents,
+	      TimerRefs, Timers, TimeoutsR, Seen, TimeoutEvents,
 	      timeout, Time, Time, [])
     end.
 
 parse_timers(
-  TimerRefs, TimerTypes, CancelTimers, TimeoutsR,
-  Seen, TimeoutEvents,
+  TimerRefs, Timers, TimeoutsR, Seen, TimeoutEvents,
   TimerType, Time, TimerMsg, TimerOpts) ->
     case Seen of
 	#{TimerType := _} ->
 	    %% Type seen before - ignore
 	    parse_timers(
-	      TimerRefs, TimerTypes, CancelTimers, TimeoutsR,
-	      Seen, TimeoutEvents);
+              TimerRefs, Timers, TimeoutsR, Seen, TimeoutEvents);
 	#{} ->
 	    %% Unseen type - handle
 	    NewSeen = Seen#{TimerType => true},
 	    case Time of
 		infinity ->
 		    %% Cancel any running timer
-		    {NewTimerTypes,NewCancelTimers} =
-			cancel_timer_by_type(
-			  TimerType, TimerTypes, CancelTimers),
 		    parse_timers(
-		      TimerRefs, NewTimerTypes, NewCancelTimers, TimeoutsR,
-		      NewSeen, TimeoutEvents);
+		      TimerRefs, cancel_timer_by_type(TimerType, Timers),
+                      TimeoutsR, NewSeen, TimeoutEvents);
 		zero ->
 		    %% Cancel any running timer
-		    {NewTimerTypes,NewCancelTimers} =
-			cancel_timer_by_type(
-			  TimerType, TimerTypes, CancelTimers),
 		    %% Handle zero time timeouts later
-		    TimeoutEvent = {TimerType,TimerMsg},
 		    parse_timers(
-		      TimerRefs, NewTimerTypes, NewCancelTimers, TimeoutsR,
-		      NewSeen, [TimeoutEvent|TimeoutEvents]);
+		      TimerRefs, cancel_timer_by_type(TimerType, Timers),
+                      TimeoutsR, NewSeen,
+                      [{TimerType,TimerMsg}|TimeoutEvents]);
 		_ ->
 		    %% (Re)start the timer
 		    TimerRef =
 			erlang:start_timer(
 			  Time, self(), TimerMsg, TimerOpts),
-		    case TimerTypes of
-			#{TimerType := OldTimerRef} ->
+		    case Timers of
+			{#{TimerType := OldTimerRef} = TimerTypes,
+                         CancelTimers} ->
 			    %% Cancel the running timer
 			    cancel_timer(OldTimerRef),
 			    NewCancelTimers = CancelTimers + 1,
@@ -1575,17 +1736,17 @@ parse_timers(
 			    %% both TimerRefs and TimerTypes
 			    parse_timers(
 			      TimerRefs#{TimerRef => TimerType},
-			      TimerTypes#{TimerType => TimerRef},
-			      NewCancelTimers, TimeoutsR,
-			      NewSeen, TimeoutEvents);
-			#{} ->
+			      {TimerTypes#{TimerType => TimerRef},
+                               NewCancelTimers},
+                              TimeoutsR, NewSeen, TimeoutEvents);
+			{#{} = TimerTypes,CancelTimers} ->
 			    %% Insert the new timer into
 			    %% both TimerRefs and TimerTypes
 			    parse_timers(
 			      TimerRefs#{TimerRef => TimerType},
-			      TimerTypes#{TimerType => TimerRef},
-			      CancelTimers, TimeoutsR,
-			      NewSeen, TimeoutEvents)
+			      {TimerTypes#{TimerType => TimerRef},
+                               CancelTimers},
+                              TimeoutsR, NewSeen, TimeoutEvents)
 		    end
 	    end
     end.
@@ -1607,6 +1768,8 @@ prepend_timeout_events([], EventsR) ->
 prepend_timeout_events([{timeout,_} = TimeoutEvent|TimeoutEvents], []) ->
     prepend_timeout_events(TimeoutEvents, [TimeoutEvent]);
 prepend_timeout_events([{timeout,_}|TimeoutEvents], EventsR) ->
+    %% Ignore since there are other events in queue
+    %% so they have cancelled the event timeout 0.
     prepend_timeout_events(TimeoutEvents, EventsR);
 prepend_timeout_events([TimeoutEvent|TimeoutEvents], EventsR) ->
     %% Just prepend all others
@@ -1617,23 +1780,28 @@ prepend_timeout_events([TimeoutEvent|TimeoutEvents], EventsR) ->
 %%---------------------------------------------------------------------------
 %% Server helpers
 
-reply_then_terminate(
-  Class, Reason, Stacktrace, Debug,
-  #{state := State} = S, Q, Replies) ->
+reply_then_terminate(Class, Reason, Stacktrace, Debug, S, Q, Replies) ->
     do_reply_then_terminate(
-      Class, Reason, Stacktrace, Debug,
-      S, Q, listify(Replies), State).
+      Class, Reason, Stacktrace, Debug, S, Q, listify(Replies)).
 %%
 do_reply_then_terminate(
-  Class, Reason, Stacktrace, Debug, S, Q, [], _State) ->
+  Class, Reason, Stacktrace, Debug, S, Q, []) ->
     terminate(Class, Reason, Stacktrace, Debug, S, Q);
 do_reply_then_terminate(
-  Class, Reason, Stacktrace, Debug, S, Q, [R|Rs], State) ->
+  Class, Reason, Stacktrace, Debug, S, Q, [R|Rs]) ->
     case R of
 	{reply,{_To,_Tag}=From,Reply} ->
-	    NewDebug = do_reply(Debug, S, State, From, Reply),
+            reply(From, Reply),
+            NewDebug =
+                ?sys_debug(
+                   Debug,
+                   begin
+                       #state{name = Name, state = State} = S,
+                       {Name,State}
+                   end,
+                   {out,Reply,From}),
 	    do_reply_then_terminate(
-	      Class, Reason, Stacktrace, NewDebug, S, Q, Rs, State);
+	      Class, Reason, Stacktrace, NewDebug, S, Q, Rs);
 	_ ->
 	    terminate(
 	      error,
@@ -1642,14 +1810,9 @@ do_reply_then_terminate(
 	      Debug, S, Q)
     end.
 
-do_reply(Debug, S, State, From, Reply) ->
-    reply(From, Reply),
-    sys_debug(Debug, S, State, {out,Reply,From}).
-
-
 terminate(
   Class, Reason, Stacktrace, Debug,
-  #{module := Module, state := State, data := Data, postponed := P} = S,
+  #state{module = Module, state = State, data = Data} = S,
   Q) ->
     case erlang:function_exported(Module, terminate, 3) of
 	true ->
@@ -1657,10 +1820,9 @@ terminate(
 		_ -> ok
 	    catch
 		_ -> ok;
-		C:R ->
-		    ST = erlang:get_stacktrace(),
+		C:R:ST ->
 		    error_info(
-		      C, R, ST, S, Q, P,
+		      C, R, ST, S, Q,
 		      format_status(terminate, get(), S)),
 		    sys:print_log(Debug),
 		    erlang:raise(C, R, ST)
@@ -1671,14 +1833,14 @@ terminate(
     _ =
 	case Reason of
 	    normal ->
-		sys_debug(Debug, S, State, {terminate,Reason});
+                terminate_sys_debug(Debug, S, State, Reason);
 	    shutdown ->
-		sys_debug(Debug, S, State, {terminate,Reason});
+                terminate_sys_debug(Debug, S, State, Reason);
 	    {shutdown,_} ->
-		sys_debug(Debug, S, State, {terminate,Reason});
+                terminate_sys_debug(Debug, S, State, Reason);
 	    _ ->
 		error_info(
-		  Class, Reason, Stacktrace, S, Q, P,
+		  Class, Reason, Stacktrace, S, Q,
 		  format_status(terminate, get(), S)),
 		sys:print_log(Debug)
 	end,
@@ -1689,12 +1851,18 @@ terminate(
 	    erlang:raise(Class, Reason, Stacktrace)
     end.
 
+terminate_sys_debug(Debug, S, State, Reason) ->
+    ?sys_debug(Debug, {S#state.name,State}, {terminate,Reason}).
+
+
 error_info(
   Class, Reason, Stacktrace,
-  #{name := Name,
-    callback_mode := CallbackMode,
-    state_enter := StateEnter},
-  Q, P, FmtData) ->
+  #state{
+     name = Name,
+     callback_mode = CallbackMode,
+     state_enter = StateEnter,
+     postponed = P},
+  Q, FmtData) ->
     {FixedReason,FixedStacktrace} =
 	case Stacktrace of
 	    [{M,F,Args,_}|ST]
@@ -1775,7 +1943,7 @@ error_info(
 %% Call Module:format_status/2 or return a default value
 format_status(
   Opt, PDict,
-  #{module := Module, state := State, data := Data}) ->
+  #state{module = Module, state = State, data = Data}) ->
     case erlang:function_exported(Module, format_status, 2) of
 	true ->
 	    try Module:format_status(Opt, [PDict,State,Data])
@@ -1800,6 +1968,7 @@ format_status_default(Opt, State, Data) ->
 	    [{data,[{"State",StateData}]}]
     end.
 
+-compile({inline, [listify/1]}).
 listify(Item) when is_list(Item) ->
     Item;
 listify(Item) ->
@@ -1813,14 +1982,16 @@ listify(Item) ->
 %%
 %% Remove the timer from TimerTypes.
 %% When we get the cancel_timer msg we remove it from TimerRefs.
-cancel_timer_by_type(TimerType, TimerTypes, CancelTimers) ->
+-compile({inline, [cancel_timer_by_type/2]}).
+cancel_timer_by_type(TimerType, {TimerTypes,CancelTimers} = TT_CT) ->
     case TimerTypes of
 	#{TimerType := TimerRef} ->
-	    cancel_timer(TimerRef),
+            ok = erlang:cancel_timer(TimerRef, [{async,true}]),
 	    {maps:remove(TimerType, TimerTypes),CancelTimers + 1};
 	#{} ->
-	    {TimerTypes,CancelTimers}
+	    TT_CT
     end.
 
+-compile({inline, [cancel_timer/1]}).
 cancel_timer(TimerRef) ->
     ok = erlang:cancel_timer(TimerRef, [{async,true}]).
diff --git a/lib/stdlib/src/io_lib.erl b/lib/stdlib/src/io_lib.erl
index 9d447418f8..e37c13093b 100644
--- a/lib/stdlib/src/io_lib.erl
+++ b/lib/stdlib/src/io_lib.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -149,7 +149,7 @@ fread(Chars, Format) ->
 
 -spec fread(Continuation, CharSpec, Format) -> Return when
       Continuation :: continuation() | [],
-      CharSpec :: string() | eof,
+      CharSpec :: string() | 'eof',
       Format :: string(),
       Return :: {'more', Continuation1 :: continuation()}
               | {'done', Result, LeftOverChars :: string()},
@@ -931,7 +931,7 @@ limit_term(Term, Depth) ->
 limit(_, 0) -> '...';
 limit([H|T]=L, D) ->
     if
-	D =:= 1 -> '...';
+	D =:= 1 -> ['...'];
 	true ->
             case printable_list(L) of
                 true -> L;
@@ -944,7 +944,7 @@ limit(Term, D) when is_map(Term) ->
 limit({}=T, _D) -> T;
 limit(T, D) when is_tuple(T) ->
     if
-	D =:= 1 -> '...';
+	D =:= 1 -> {'...'};
 	true ->
             list_to_tuple([limit(element(1, T), D-1)|
                            limit_tail(tl(tuple_to_list(T)), D-1)])
@@ -961,21 +961,29 @@ limit_tail(Other, D) ->
 
 %% Cannot limit maps properly since there is no guarantee that
 %% maps:from_list() creates a map with the same internal ordering of
-%% the selected associations as in Map.
+%% the selected associations as in Map. Instead of subtracting one
+%% from the depth as the map associations are traversed (as is done
+%% for tuples and lists), the same depth is applied to each and every
+%% (returned) association.
 limit_map(Map, D) ->
-    maps:from_list(erts_internal:maps_to_list(Map, D)).
-%%     maps:from_list(limit_map_body(erts_internal:maps_to_list(Map, D), D)).
-
-%% limit_map_body(_, 0) -> [{'...', '...'}];
-%% limit_map_body([], _) -> [];
-%% limit_map_body([{K,V}], D) -> [limit_map_assoc(K, V, D)];
-%% limit_map_body([{K,V}|KVs], D) ->
-%%     [limit_map_assoc(K, V, D) | limit_map_body(KVs, D-1)].
+    %% Keep one extra association to make sure the final ',...' is included.
+    limit_map_body(maps:iterator(Map), D + 1, D, []).
+
+limit_map_body(_I, 0, _D0, Acc) ->
+    maps:from_list(Acc);
+limit_map_body(I, D, D0, Acc) ->
+    case maps:next(I) of
+        {K, V, NextI} ->
+            limit_map_body(NextI, D-1, D0, [limit_map_assoc(K, V, D0) | Acc]);
+        none ->
+            maps:from_list(Acc)
+    end.
 
-%% limit_map_assoc(K, V, D) ->
-%%     {limit(K, D-1), limit(V, D-1)}.
+limit_map_assoc(K, V, D) ->
+    %% Keep keys as are to avoid creating duplicated keys.
+    {K, limit(V, D - 1)}.
 
-limit_bitstring(B, _D) -> B. %% Keeps all printable binaries.
+limit_bitstring(B, _D) -> B. % Keeps all printable binaries.
 
 test_limit(_, 0) -> throw(limit);
 test_limit([H|T]=L, D) when is_integer(D) ->
@@ -1011,18 +1019,21 @@ test_limit_tuple(T, I, Sz, D) ->
     test_limit(element(I, T), D-1),
     test_limit_tuple(T, I+1, Sz, D-1).
 
-test_limit_map(_Map, _D) -> ok.
-%%     test_limit_map_body(erts_internal:maps_to_list(Map, D), D).
-
-%% test_limit_map_body(_, 0) -> throw(limit);
-%% test_limit_map_body([], _) -> ok;
-%% test_limit_map_body([{K,V}], D) -> test_limit_map_assoc(K, V, D);
-%% test_limit_map_body([{K,V}|KVs], D) ->
-%%     test_limit_map_assoc(K, V, D),
-%%     test_limit_map_body(KVs, D-1).
+test_limit_map(Map, D) ->
+    test_limit_map_body(maps:iterator(Map), D).
+
+test_limit_map_body(_I, 0) -> throw(limit); % cannot happen
+test_limit_map_body(I, D) ->
+    case maps:next(I) of
+        {K, V, NextI} ->
+            test_limit_map_assoc(K, V, D),
+            test_limit_map_body(NextI, D-1);
+        none ->
+            ok
+    end.
 
-%% test_limit_map_assoc(K, V, D) ->
-%%     test_limit(K, D-1),
-%%     test_limit(V, D-1).
+test_limit_map_assoc(K, V, D) ->
+    test_limit(K, D - 1),
+    test_limit(V, D - 1).
 
 test_limit_bitstring(_, _) -> ok.
diff --git a/lib/stdlib/src/io_lib_format.erl b/lib/stdlib/src/io_lib_format.erl
index e345810ca0..64edbf1824 100644
--- a/lib/stdlib/src/io_lib_format.erl
+++ b/lib/stdlib/src/io_lib_format.erl
@@ -95,7 +95,7 @@ print([]) ->
     [].
 
 print(C, F, Ad, P, Pad, Encoding, Strings) ->
-    [$~] ++ print_field_width(F, Ad) ++ print_precision(P) ++
+    [$~] ++ print_field_width(F, Ad) ++ print_precision(P, Pad) ++
         print_pad_char(Pad) ++ print_encoding(Encoding) ++
         print_strings(Strings) ++ [C].
 
@@ -103,8 +103,9 @@ print_field_width(none, _Ad) -> "";
 print_field_width(F, left) -> integer_to_list(-F);
 print_field_width(F, right) -> integer_to_list(F).
 
-print_precision(none) -> "";
-print_precision(P) -> [$. | integer_to_list(P)].
+print_precision(none, $\s) -> "";
+print_precision(none, _Pad) -> ".";  % pad must be second dot
+print_precision(P, _Pad) -> [$. | integer_to_list(P)].
 
 print_pad_char($\s) -> ""; % default, no need to make explicit
 print_pad_char(Pad) -> [$., Pad].
@@ -126,25 +127,23 @@ collect_cseq(Fmt0, Args0) ->
     {F,Ad,Fmt1,Args1} = field_width(Fmt0, Args0),
     {P,Fmt2,Args2} = precision(Fmt1, Args1),
     {Pad,Fmt3,Args3} = pad_char(Fmt2, Args2),
-    {Encoding,Fmt4,Args4} = encoding(Fmt3, Args3),
-    {Strings,Fmt5,Args5} = strings(Fmt4, Args4),
-    {C,As,Fmt6,Args6} = collect_cc(Fmt5, Args5),
-    FormatSpec = #{control_char => C, args => As, width => F, adjust => Ad,
-                   precision => P, pad_char => Pad, encoding => Encoding,
-                   strings => Strings},
-    {FormatSpec,Fmt6,Args6}.
-
-encoding([$t|Fmt],Args) ->
-    true = hd(Fmt) =/= $l,
-    {unicode,Fmt,Args};
-encoding(Fmt,Args) ->
-    {latin1,Fmt,Args}.
-
-strings([$l|Fmt],Args) ->
-    true = hd(Fmt) =/= $t,
-    {false,Fmt,Args};
-strings(Fmt,Args) ->
-    {true,Fmt,Args}.
+    Spec0 = #{width => F,
+              adjust => Ad,
+              precision => P,
+              pad_char => Pad,
+              encoding => latin1,
+              strings => true},
+    {Spec1,Fmt4} = modifiers(Fmt3, Spec0),
+    {C,As,Fmt5,Args4} = collect_cc(Fmt4, Args3),
+    Spec2 = Spec1#{control_char => C, args => As},
+    {Spec2,Fmt5,Args4}.
+
+modifiers([$t|Fmt], Spec) ->
+    modifiers(Fmt, Spec#{encoding => unicode});
+modifiers([$l|Fmt], Spec) ->
+    modifiers(Fmt, Spec#{strings => false});
+modifiers(Fmt, Spec) ->
+    {Spec, Fmt}.
 
 field_width([$-|Fmt0], Args0) ->
     {F,Fmt,Args} = field_value(Fmt0, Args0),
diff --git a/lib/stdlib/src/io_lib_fread.erl b/lib/stdlib/src/io_lib_fread.erl
index 983e8d4566..319bff484e 100644
--- a/lib/stdlib/src/io_lib_fread.erl
+++ b/lib/stdlib/src/io_lib_fread.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -38,7 +38,7 @@
 
 -spec fread(Continuation, String, Format) -> Return when
       Continuation :: io_lib:continuation() |  [],
-      String :: string(),
+      String :: string() | 'eof',
       Format :: string(),
       Return :: {'more', Continuation1 :: io_lib:continuation()}
               | {'done', Result, LeftOverChars :: string()},
diff --git a/lib/stdlib/src/io_lib_pretty.erl b/lib/stdlib/src/io_lib_pretty.erl
index 505613b80e..89e1931d2d 100644
--- a/lib/stdlib/src/io_lib_pretty.erl
+++ b/lib/stdlib/src/io_lib_pretty.erl
@@ -478,9 +478,19 @@ print_length(Term, _D, _RF, _Enc, _Str) ->
 print_length_map(_Map, 1, _RF, _Enc, _Str) ->
     {"#{...}", 6};
 print_length_map(Map, D, RF, Enc, Str) when is_map(Map) ->
-    Pairs = print_length_map_pairs(erts_internal:maps_to_list(Map, D), D, RF, Enc, Str),
+    Pairs = print_length_map_pairs(limit_map(maps:iterator(Map), D, []), D, RF, Enc, Str),
     {{map, Pairs}, list_length(Pairs, 3)}.
 
+limit_map(_I, 0, Acc) ->
+    Acc;
+limit_map(I, D, Acc) ->
+    case maps:next(I) of
+        {K, V, NextI} ->
+            limit_map(NextI, D-1, [{K,V} | Acc]);
+        none ->
+            Acc
+    end.
+
 print_length_map_pairs([], _D, _RF, _Enc, _Str) ->
     [];
 print_length_map_pairs(_Pairs, 1, _RF, _Enc, _Str) ->
diff --git a/lib/stdlib/src/lib.erl b/lib/stdlib/src/lib.erl
index a7980cc294..51e0c3f77e 100644
--- a/lib/stdlib/src/lib.erl
+++ b/lib/stdlib/src/lib.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -551,7 +551,7 @@ format_stacktrace1(S0, Stack0, PF, SF, Enc) ->
     format_stacktrace2(S, Stack, 1, PF, Enc).
 
 format_stacktrace2(S, [{M,F,A,L}|Fs], N, PF, Enc) when is_integer(A) ->
-    [io_lib:fwrite(<<"~s~s ~ts ~s">>,
+    [io_lib:fwrite(<<"~s~s ~ts ~ts">>,
                    [sep(N, S), origin(N, M, F, A),
 		    mfa_to_string(M, F, A, Enc),
 		    location(L)])
@@ -573,7 +573,7 @@ location(L) ->
     Line = proplists:get_value(line, L),
     if
 	File =/= undefined, Line =/= undefined ->
-	    io_lib:format("(~s, line ~w)", [File, Line]);
+	    io_lib:format("(~ts, line ~w)", [File, Line]);
 	true ->
 	    ""
     end.
diff --git a/lib/stdlib/src/lists.erl b/lib/stdlib/src/lists.erl
index af9d63ddd6..06c90c0280 100644
--- a/lib/stdlib/src/lists.erl
+++ b/lib/stdlib/src/lists.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -38,8 +38,8 @@
 
 -export([all/2,any/2,map/2,flatmap/2,foldl/3,foldr/3,filter/2,
 	 partition/2,zf/2,filtermap/2,
-	 mapfoldl/3,mapfoldr/3,foreach/2,takewhile/2,dropwhile/2,splitwith/2,
-	 split/2,
+	 mapfoldl/3,mapfoldr/3,foreach/2,takewhile/2,dropwhile/2,
+         search/2, splitwith/2,split/2,
 	 join/2]).
 
 %%% BIFs
@@ -1399,6 +1399,19 @@ dropwhile(Pred, [Hd|Tail]=Rest) ->
     end;
 dropwhile(Pred, []) when is_function(Pred, 1) -> [].
 
+-spec search(Pred, List) -> {value, Value} | false when
+      Pred :: fun((T) -> boolean()),
+      List :: [T],
+      Value :: T.
+
+search(Pred, [Hd|Tail]) ->
+    case Pred(Hd) of
+        true -> {value, Hd};
+        false -> search(Pred, Tail)
+    end;
+search(Pred, []) when is_function(Pred, 1) ->
+    false.
+
 -spec splitwith(Pred, List) -> {List1, List2} when
       Pred :: fun((T) -> boolean()),
       List :: [T],
diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl
index 5dafdb282a..a13f340709 100644
--- a/lib/stdlib/src/maps.erl
+++ b/lib/stdlib/src/maps.erl
@@ -23,7 +23,8 @@
 -export([get/3, filter/2,fold/3,
          map/2, size/1,
          update_with/3, update_with/4,
-         without/2, with/2]).
+         without/2, with/2,
+         iterator/1, next/1]).
 
 %% BIFs
 -export([get/2, find/2, from_list/1,
@@ -31,6 +32,15 @@
          new/0, put/3, remove/2, take/2,
          to_list/1, update/3, values/1]).
 
+-opaque iterator() :: {term(), term(), iterator()}
+                      | none | nonempty_improper_list(integer(),map()).
+
+-export_type([iterator/0]).
+
+-dialyzer({no_improper_lists, iterator/1}).
+
+-define(IS_ITERATOR(I), is_tuple(I) andalso tuple_size(I) == 3; I == none; is_integer(hd(I)) andalso is_map(tl(I))).
+
 %% Shadowed by erl_bif_types: maps:get/2
 -spec get(Key,Map) -> Value when
     Key :: term(),
@@ -39,7 +49,6 @@
 
 get(_,_) -> erlang:nif_error(undef).
 
-
 -spec find(Key,Map) -> {ok, Value} | error when
     Key :: term(),
     Map :: map(),
@@ -114,14 +123,20 @@ remove(_,_) -> erlang:nif_error(undef).
 
 take(_,_) -> erlang:nif_error(undef).
 
-%% Shadowed by erl_bif_types: maps:to_list/1
 -spec to_list(Map) -> [{Key,Value}] when
     Map :: map(),
     Key :: term(),
     Value :: term().
 
-to_list(_) -> erlang:nif_error(undef).
+to_list(Map) when is_map(Map) ->
+    to_list_internal(erts_internal:map_next(0, Map, []));
+to_list(Map) ->
+    erlang:error({badmap,Map},[Map]).
 
+to_list_internal([Iter, Map | Acc]) when is_integer(Iter) ->
+    to_list_internal(erts_internal:map_next(Iter, Map, Acc));
+to_list_internal(Acc) ->
+    Acc.
 
 %% Shadowed by erl_bif_types: maps:update/3
 -spec update(Key,Value,Map1) -> Map2 when
@@ -192,47 +207,80 @@ get(Key,Map,Default) ->
     erlang:error({badmap,Map},[Key,Map,Default]).
 
 
--spec filter(Pred,Map1) -> Map2 when
+-spec filter(Pred,MapOrIter) -> Map when
       Pred :: fun((Key, Value) -> boolean()),
       Key  :: term(),
       Value :: term(),
-      Map1 :: map(),
-      Map2 :: map().
+      MapOrIter :: map() | iterator(),
+      Map :: map().
 
 filter(Pred,Map) when is_function(Pred,2), is_map(Map) ->
-    maps:from_list([{K,V}||{K,V}<-maps:to_list(Map),Pred(K,V)]);
+    maps:from_list(filter_1(Pred, iterator(Map)));
+filter(Pred,Iterator) when is_function(Pred,2), ?IS_ITERATOR(Iterator) ->
+    maps:from_list(filter_1(Pred, Iterator));
 filter(Pred,Map) ->
     erlang:error(error_type(Map),[Pred,Map]).
 
-
--spec fold(Fun,Init,Map) -> Acc when
+filter_1(Pred, Iter) ->
+    case next(Iter) of
+        {K, V, NextIter} ->
+            case Pred(K,V) of
+                true ->
+                    [{K,V} | filter_1(Pred, NextIter)];
+                false ->
+                    filter_1(Pred, NextIter)
+            end;
+        none ->
+            []
+    end.
+
+-spec fold(Fun,Init,MapOrIter) -> Acc when
     Fun :: fun((K, V, AccIn) -> AccOut),
     Init :: term(),
     Acc :: term(),
     AccIn :: term(),
     AccOut :: term(),
-    Map :: map(),
+    MapOrIter :: map() | iterator(),
     K :: term(),
     V :: term().
 
 fold(Fun,Init,Map) when is_function(Fun,3), is_map(Map) ->
-    lists:foldl(fun({K,V},A) -> Fun(K,V,A) end,Init,maps:to_list(Map));
+    fold_1(Fun,Init,iterator(Map));
+fold(Fun,Init,Iterator) when is_function(Fun,3), ?IS_ITERATOR(Iterator) ->
+    fold_1(Fun,Init,Iterator);
 fold(Fun,Init,Map) ->
     erlang:error(error_type(Map),[Fun,Init,Map]).
 
--spec map(Fun,Map1) -> Map2 when
+fold_1(Fun, Acc, Iter) ->
+    case next(Iter) of
+        {K, V, NextIter} ->
+            fold_1(Fun, Fun(K,V,Acc), NextIter);
+        none ->
+            Acc
+    end.
+
+-spec map(Fun,MapOrIter) -> Map when
     Fun :: fun((K, V1) -> V2),
-    Map1 :: map(),
-    Map2 :: map(),
+    MapOrIter :: map() | iterator(),
+    Map :: map(),
     K :: term(),
     V1 :: term(),
     V2 :: term().
 
 map(Fun,Map) when is_function(Fun, 2), is_map(Map) ->
-    maps:from_list([{K,Fun(K,V)}||{K,V}<-maps:to_list(Map)]);
+    maps:from_list(map_1(Fun, iterator(Map)));
+map(Fun,Iterator) when is_function(Fun, 2), ?IS_ITERATOR(Iterator) ->
+    maps:from_list(map_1(Fun, Iterator));
 map(Fun,Map) ->
     erlang:error(error_type(Map),[Fun,Map]).
 
+map_1(Fun, Iter) ->
+    case next(Iter) of
+        {K, V, NextIter} ->
+            [{K, Fun(K, V)} | map_1(Fun, NextIter)];
+        none ->
+            []
+    end.
 
 -spec size(Map) -> non_neg_integer() when
     Map :: map().
@@ -242,6 +290,26 @@ size(Map) when is_map(Map) ->
 size(Val) ->
     erlang:error({badmap,Val},[Val]).
 
+-spec iterator(Map) -> Iterator when
+      Map :: map(),
+      Iterator :: iterator().
+
+iterator(M) when is_map(M) -> [0 | M];
+iterator(M) -> erlang:error({badmap, M}, [M]).
+
+-spec next(Iterator) -> {Key, Value, NextIterator} | 'none' when
+      Iterator :: iterator(),
+      Key :: term(),
+      Value :: term(),
+      NextIterator :: iterator().
+next({K, V, I}) ->
+    {K, V, I};
+next([Path | Map]) when is_integer(Path), is_map(Map) ->
+    erts_internal:map_next(Path, Map, iterator);
+next(none) ->
+    none;
+next(Iter) ->
+    erlang:error(badarg, [Iter]).
 
 -spec without(Ks,Map1) -> Map2 when
     Ks :: [K],
@@ -250,11 +318,10 @@ size(Val) ->
     K :: term().
 
 without(Ks,M) when is_list(Ks), is_map(M) ->
-    lists:foldl(fun(K, M1) -> ?MODULE:remove(K, M1) end, M, Ks);
+    lists:foldl(fun(K, M1) -> maps:remove(K, M1) end, M, Ks);
 without(Ks,M) ->
     erlang:error(error_type(M),[Ks,M]).
 
-
 -spec with(Ks, Map1) -> Map2 when
     Ks :: [K],
     Map1 :: map(),
@@ -263,17 +330,17 @@ without(Ks,M) ->
 
 with(Ks,Map1) when is_list(Ks), is_map(Map1) ->
     Fun = fun(K, List) ->
-      case ?MODULE:find(K, Map1) of
-          {ok, V} ->
-              [{K, V} | List];
-          error ->
-              List
-      end
-    end,
-    ?MODULE:from_list(lists:foldl(Fun, [], Ks));
+                  case maps:find(K, Map1) of
+                      {ok, V} ->
+                          [{K, V} | List];
+                      error ->
+                          List
+                  end
+          end,
+    maps:from_list(lists:foldl(Fun, [], Ks));
 with(Ks,M) ->
     erlang:error(error_type(M),[Ks,M]).
 
 
-error_type(M) when is_map(M) -> badarg;
+error_type(M) when is_map(M); ?IS_ITERATOR(M) -> badarg;
 error_type(V) -> {badmap, V}.
diff --git a/lib/stdlib/src/ordsets.erl b/lib/stdlib/src/ordsets.erl
index 569407f5ef..939e147ad8 100644
--- a/lib/stdlib/src/ordsets.erl
+++ b/lib/stdlib/src/ordsets.erl
@@ -19,7 +19,7 @@
 
 -module(ordsets).
 
--export([new/0,is_set/1,size/1,to_list/1,from_list/1]).
+-export([new/0,is_set/1,size/1,is_empty/1,to_list/1,from_list/1]).
 -export([is_element/2,add_element/2,del_element/2]).
 -export([union/2,union/1,intersection/2,intersection/1]).
 -export([is_disjoint/2]).
@@ -60,6 +60,13 @@ is_set([], _) -> true.
 
 size(S) -> length(S).
 
+%% is_empty(OrdSet) -> boolean().
+%%  Return 'true' if OrdSet is an empty set, otherwise 'false'.
+-spec is_empty(Ordset) -> boolean() when
+      Ordset :: ordset(_).
+
+is_empty(S) -> S=:=[].
+
 %% to_list(OrdSet) -> [Elem].
 %%  Return the elements in OrdSet as a list.
 
diff --git a/lib/stdlib/src/otp_internal.erl b/lib/stdlib/src/otp_internal.erl
index 122b476ddb..5b488cc677 100644
--- a/lib/stdlib/src/otp_internal.erl
+++ b/lib/stdlib/src/otp_internal.erl
@@ -609,52 +609,6 @@ obsolete_1(filename, find_src, 2) ->
 obsolete_1(erlang, hash, 2) ->
     {removed, {erlang, phash2, 2}, "20.0"};
 
-%% Added in OTP-21
-obsolete_1(string, len, 1) ->
-    {deprecated, "deprecated; use string:length/3 instead"};
-obsolete_1(string, concat, 2) ->
-    {deprecated, "deprecated; use [Str1,Str2] instead"};
-obsolete_1(string, str, 2) ->
-    {deprecated, "deprecated; use string:find/2 instead"};
-obsolete_1(string, rstr, 2) ->
-    {deprecated, "deprecated; use string:find/3 instead"};
-obsolete_1(string, chr, 2) ->
-    {deprecated, "deprecated; use string:find/2 instead"};
-obsolete_1(string, rchr, 2) ->
-    {deprecated, "deprecated; use string:find/3 instead"};
-obsolete_1(string, span, 2) ->
-    {deprecated, "deprecated; use string:take/2 instead"};
-obsolete_1(string, cspan, 2) ->
-    {deprecated, "deprecated; use string:take/3 instead"};
-obsolete_1(string, substr, _) ->
-    {deprecated, "deprecated; use string:slice/3 instead"};
-obsolete_1(string, tokens, 2) ->
-    {deprecated, "deprecated; use string:lexemes/2 instead"};
-obsolete_1(string, chars, _) ->
-    {deprecated, "deprecated; use lists:duplicate/2 instead"};
-obsolete_1(string, copies, _) ->
-    {deprecated, "deprecated; use lists:duplicate/2 instead"};
-obsolete_1(string, words, _) ->
-    {deprecated, "deprecated; use string:lexemes/2 instead"};
-obsolete_1(string, strip, _) ->
-    {deprecated, "deprecated; use string:trim/3 instead"};
-obsolete_1(string, sub_word, _) ->
-    {deprecated, "deprecated; use string:nth_lexeme/3 instead"};
-obsolete_1(string, sub_string, _) ->
-    {deprecated, "deprecated; use string:slice/3 instead"};
-obsolete_1(string, left, _) ->
-    {deprecated, "deprecated; use string:pad/3 instead"};
-obsolete_1(string, right, _) ->
-    {deprecated, "deprecated; use string:pad/3 instead"};
-obsolete_1(string, centre, _) ->
-    {deprecated, "deprecated; use string:pad/3 instead"};
-obsolete_1(string, join, _) ->
-    {deprecated, "deprecated; use lists:join/2 instead"};
-obsolete_1(string, to_upper, _) ->
-    {deprecated, "deprecated; use string:uppercase/1 or string:titlecase/1 instead"};
-obsolete_1(string, to_lower, _) ->
-    {deprecated, "deprecated; use string:lowercase/1 or string:casefold/1 instead"};
-
 %% not obsolete
 
 obsolete_1(_, _, _) ->
diff --git a/lib/stdlib/src/proc_lib.erl b/lib/stdlib/src/proc_lib.erl
index 8e10cbe93b..1991585c13 100644
--- a/lib/stdlib/src/proc_lib.erl
+++ b/lib/stdlib/src/proc_lib.erl
@@ -231,8 +231,8 @@ init_p(Parent, Ancestors, Fun) when is_function(Fun) ->
     try
 	Fun()
     catch
-	Class:Reason ->
-	    exit_p(Class, Reason, erlang:get_stacktrace())
+	Class:Reason:Stacktrace ->
+	    exit_p(Class, Reason, Stacktrace)
     end.
 
 -spec init_p(pid(), [pid()], atom(), atom(), [term()]) -> term().
@@ -246,8 +246,8 @@ init_p_do_apply(M, F, A) ->
     try
 	apply(M, F, A) 
     catch
-	Class:Reason ->
-	    exit_p(Class, Reason, erlang:get_stacktrace())
+	Class:Reason:Stacktrace ->
+	    exit_p(Class, Reason, Stacktrace)
     end.
 
 -spec wake_up(atom(), atom(), [term()]) -> term().
@@ -256,8 +256,8 @@ wake_up(M, F, A) when is_atom(M), is_atom(F), is_list(A) ->
     try
 	apply(M, F, A) 
     catch
-	Class:Reason ->
-	    exit_p(Class, Reason, erlang:get_stacktrace())
+	Class:Reason:Stacktrace ->
+	    exit_p(Class, Reason, Stacktrace)
     end.
 
 exit_p(Class, Reason, Stacktrace) ->
diff --git a/lib/stdlib/src/qlc.erl b/lib/stdlib/src/qlc.erl
index f11f9d0a0b..3a66f6930b 100644
--- a/lib/stdlib/src/qlc.erl
+++ b/lib/stdlib/src/qlc.erl
@@ -301,11 +301,11 @@ eval(QH, Options) ->
                             post_funs(Post)
                         end
                 end
-            catch Term ->
-                case erlang:get_stacktrace() of
+            catch throw:Term:Stacktrace ->
+                case Stacktrace of
                     [?THROWN_ERROR | _] ->
                         Term;
-                    Stacktrace ->
+                    _ ->
                         erlang:raise(throw, Term, Stacktrace)
                 end
             end
@@ -359,11 +359,11 @@ fold(Fun, Acc0, QH, Options) ->
                             post_funs(Post)
                         end
                 end
-            catch Term ->
-                case erlang:get_stacktrace() of
+            catch throw:Term:Stacktrace ->
+                case Stacktrace of
                     [?THROWN_ERROR | _] ->
                         Term;
-                    Stacktrace ->
+                    _ ->
                         erlang:raise(throw, Term, Stacktrace)
                 end
             end
@@ -457,11 +457,11 @@ info(QH, Options) ->
                     debug -> % Not documented. Intended for testing only.
                         Info
                 end
-            catch Term ->
-                case erlang:get_stacktrace() of
+            catch throw:Term:Stacktrace ->
+                case Stacktrace of
                     [?THROWN_ERROR | _] ->
                         Term;
-                    Stacktrace ->
+                    _ ->
                         erlang:raise(throw, Term, Stacktrace)
                 end
             end
@@ -1056,9 +1056,9 @@ cursor_process(H, GUnique, GCache, TmpDir, SpawnOptions, MaxList, TmpUsage) ->
                          Prep = prepare_qlc(H, not_a_list, GUnique, GCache, 
                                             TmpDir, MaxList, TmpUsage),
                          setup_qlc(Prep, Setup)
-                     catch Class:Reason ->
-                           Parent ! {self(), {caught, Class, Reason, 
-                                     erlang:get_stacktrace()}},
+                     catch Class:Reason:Stacktrace ->
+                           Parent ! {self(),
+                                     {caught, Class, Reason, Stacktrace}},
                            exit(normal)
                      end,
                  Parent ! {self(), ok},
@@ -1075,8 +1075,8 @@ parent_fun(Pid, Parent) ->
         {TPid, {parent_fun, Fun}} ->
             V = try 
                     {value, Fun()}
-                catch Class:Reason ->
-                    {parent_fun_caught, Class, Reason, erlang:get_stacktrace()}
+                catch Class:Reason:Stacktrace ->
+                    {parent_fun_caught, Class, Reason, Stacktrace}
             end,
             TPid ! {Parent, V},
             parent_fun(Pid, Parent);
@@ -1101,9 +1101,9 @@ reply(Parent, MonRef, Post, Cont) ->
                         throw_error(Cont)
                 end
             catch 
-                Class:Reason ->
+                Class:Reason:Stacktrace ->
                    post_funs(Post),
-                   Message = {caught, Class, Reason, erlang:get_stacktrace()},
+                   Message = {caught, Class, Reason, Stacktrace},
                    Parent ! {self(), Message},
                    exit(normal)
             end,
@@ -1392,9 +1392,8 @@ next_loop(Pid, L, N) when N =/= 0 ->
         {caught, throw, Error, [?THROWN_ERROR | _]} ->
             Error;
         {caught, Class, Reason, Stacktrace} ->
-            CurrentStacktrace = try erlang:error(foo)
-                                catch error:_ -> erlang:get_stacktrace()
-                                end,
+            {current_stacktrace, CurrentStacktrace} =
+                erlang:process_info(self(), current_stacktrace),
             erlang:raise(Class, Reason, Stacktrace ++ CurrentStacktrace);
         error ->
             erlang:error({qlc_cursor_pid_no_longer_exists, Pid})
@@ -2627,9 +2626,9 @@ table_handle(#qlc_table{trav_fun = TraverseFun, trav_MS = TravMS,
             Parent =:= self() ->
                 try
                     ParentFun() 
-                catch Class:Reason ->
+                catch Class:Reason:Stacktrace ->
                     post_funs(Post),
-                    erlang:raise(Class, Reason, erlang:get_stacktrace())
+                    erlang:raise(Class, Reason, Stacktrace)
                 end;
             true ->
                 case monitor_request(Parent, {parent_fun, ParentFun}) of
@@ -3033,9 +3032,9 @@ file_sort_handle(H, Kp, SortOptions, TmpDir, Compressed, Post, LocalPost) ->
         {terms, BTerms} ->
             try 
                 {[binary_to_term(B) || B <- BTerms], Post, LocalPost}
-            catch Class:Reason ->
+            catch Class:Reason:Stacktrace ->
                 post_funs(Post),
-                erlang:raise(Class, Reason, erlang:get_stacktrace())
+                erlang:raise(Class, Reason, Stacktrace)
             end
     end.
 
@@ -3045,9 +3044,9 @@ do_sort(In, Out, Sort, SortOptions, Post) ->
             {error, Reason} -> throw_reason(Reason);
             Reply -> Reply
         end
-    catch Class:Term ->
+    catch Class:Term:Stacktrace ->
         post_funs(Post),
-        erlang:raise(Class, Term, erlang:get_stacktrace())
+        erlang:raise(Class, Term, Stacktrace)
     end.
 
 do_sort(In, Out, sort, SortOptions) ->
@@ -3797,9 +3796,9 @@ call(undefined, _Arg, Default, _Post) ->
 call(Fun, Arg, _Default, Post) ->
     try
         Fun(Arg) 
-    catch Class:Reason ->
+    catch Class:Reason:Stacktrace ->
         post_funs(Post),
-        erlang:raise(Class, Reason, erlang:get_stacktrace())
+        erlang:raise(Class, Reason, Stacktrace)
     end.
 
 grd(undefined, _Arg) ->
diff --git a/lib/stdlib/src/rand.erl b/lib/stdlib/src/rand.erl
index 7a8a5e6d4a..362e98006e 100644
--- a/lib/stdlib/src/rand.erl
+++ b/lib/stdlib/src/rand.erl
@@ -21,8 +21,8 @@
 %% Multiple PRNG module for Erlang/OTP
 %% Copyright (c) 2015-2016 Kenji Rikitake
 %%
-%% exrop (xoroshiro116+) added and statistical distribution
-%% improvements by the Erlang/OTP team 2017
+%% exrop (xoroshiro116+) added, statistical distribution
+%% improvements and uniform_real added by the Erlang/OTP team 2017
 %% =====================================================================
 
 -module(rand).
@@ -30,10 +30,14 @@
 -export([seed_s/1, seed_s/2, seed/1, seed/2,
 	 export_seed/0, export_seed_s/1,
          uniform/0, uniform/1, uniform_s/1, uniform_s/2,
+         uniform_real/0, uniform_real_s/1,
          jump/0, jump/1,
 	     normal/0, normal/2, normal_s/1, normal_s/3
 	]).
 
+%% Debug
+-export([make_float/3, float2str/1, bc64/1]).
+
 -compile({inline, [exs64_next/1, exsplus_next/1,
 		   exs1024_next/1, exs1024_calc/2,
                    exrop_next/1, exrop_next_s/2,
@@ -60,6 +64,10 @@
    %% N i evaluated 3 times
    (?BSL((Bits), (X), (N)) bor ((X) bsr ((Bits)-(N))))).
 
+-define(
+   BC(V, N),
+   bc((V), ?BIT((N) - 1), N)).
+
 %%-define(TWO_POW_MINUS53, (math:pow(2, -53))).
 -define(TWO_POW_MINUS53, 1.11022302462515657e-16).
 
@@ -84,14 +92,21 @@
 %% The 'bits' field indicates how many bits the integer
 %% returned from 'next' has got, i.e 'next' shall return
 %% an random integer in the range 0..(2^Bits - 1).
-%% At least 53 bits is required for the floating point
-%% producing fallbacks.  This field is only used when
-%% the 'uniform' or 'uniform_n' fields are not defined.
+%% At least 55 bits is required for the floating point
+%% producing fallbacks, but 56 bits would be more future proof.
 %%
 %% The fields 'next', 'uniform' and 'uniform_n'
-%% implement the algorithm.  If 'uniform' or 'uinform_n'
+%% implement the algorithm.  If 'uniform' or 'uniform_n'
 %% is not present there is a fallback using 'next' and either
-%% 'bits' or the deprecated 'max'.
+%% 'bits' or the deprecated 'max'.  The 'next' function
+%% must generate a word with at least 56 good random bits.
+%%
+%% The 'weak_low_bits' field indicate how many bits are of
+%% lesser quality and they will not be used by the floating point
+%% producing functions, nor by the range producing functions
+%% when more bits are needed, to avoid weak bits in the middle
+%% of the generated bits.  The lowest bits from the range
+%% functions still have the generator's quality.
 %%
 -type alg_handler() ::
         #{type := alg(),
@@ -148,11 +163,7 @@
 
 %% For ranges larger than the algorithm bit size
 uniform_range(Range, #{next:=Next, bits:=Bits} = Alg, R, V) ->
-    WeakLowBits =
-        case Alg of
-            #{weak_low_bits:=WLB} -> WLB;
-            #{} -> 0
-        end,
+    WeakLowBits = maps:get(weak_low_bits, Alg, 0),
     %% Maybe waste the lowest bit(s) when shifting in new bits
     Shift = Bits - WeakLowBits,
     ShiftMask = bnot ?MASK(WeakLowBits),
@@ -297,7 +308,7 @@ uniform_s({#{bits:=Bits, next:=Next} = Alg, R0}) ->
     {(V bsr (Bits - 53)) * ?TWO_POW_MINUS53, {Alg, R1}};
 uniform_s({#{max:=Max, next:=Next} = Alg, R0}) ->
     {V, R1} = Next(R0),
-    %% Old broken algorithm with non-uniform density
+    %% Old algorithm with non-uniform density
     {V / (Max + 1), {Alg, R1}}.
 
 
@@ -317,7 +328,7 @@ uniform_s(N, {#{bits:=Bits, next:=Next} = Alg, R0})
     ?uniform_range(N, Alg, R1, V, MaxMinusN, I);
 uniform_s(N, {#{max:=Max, next:=Next} = Alg, R0})
   when is_integer(N), 1 =< N ->
-    %% Old broken algorithm with skewed probability
+    %% Old algorithm with skewed probability
     %% and gap in ranges > Max
     {V, R1} = Next(R0),  
     if
@@ -328,6 +339,189 @@ uniform_s(N, {#{max:=Max, next:=Next} = Alg, R0})
             {trunc(F * N) + 1, {Alg, R1}}
     end.
 
+%% uniform_real/0: returns a random float X where 0.0 < X =< 1.0,
+%% updating the state in the process dictionary.
+
+-spec uniform_real() -> X :: float().
+uniform_real() ->
+    {X, Seed} = uniform_real_s(seed_get()),
+    _ = seed_put(Seed),
+    X.
+
+%% uniform_real_s/1: given a state, uniform_s/1
+%% returns a random float X where 0.0 < X =< 1.0,
+%% and a new state.
+%%
+%% This function does not use the same form of uniformity
+%% as the uniform_s/1 function.
+%%
+%% Instead, this function does not generate numbers with equal
+%% distance in the interval, but rather tries to keep all mantissa
+%% bits random also for small numbers, meaning that the distance
+%% between possible numbers decreases when the numbers
+%% approaches 0.0, as does the possibility for a particular
+%% number.  Hence uniformity is preserved.
+%%
+%% To generate 56 bits at the time instead of 53 is actually
+%% a speed optimization since the probability to have to
+%% generate a second word decreases by 1/2 for every extra bit.
+%%
+%% This function generates normalized numbers, so the smallest number
+%% that can be generated is 2^-1022 with the distance 2^-1074
+%% to the next to smallest number, compared to 2^-53 for uniform_s/1.
+%%
+%% This concept of uniformity should work better for applications
+%% where you need to calculate 1.0/X or math:log(X) since those
+%% operations benefits from larger precision approaching 0.0,
+%% and that this function does not return 0.0 nor denormalized
+%% numbers very close to 0.0.  The log() operation in The Box-Muller
+%% transformation for normal distribution is an example of this.
+%%
+%%-define(TWO_POW_MINUS55, (math:pow(2, -55))).
+%%-define(TWO_POW_MINUS110, (math:pow(2, -110))).
+%%-define(TWO_POW_MINUS55, 2.7755575615628914e-17).
+%%-define(TWO_POW_MINUS110, 7.7037197775489436e-34).
+%%
+-spec uniform_real_s(State :: state()) -> {X :: float(), NewState :: state()}.
+uniform_real_s({#{bits:=Bits, next:=Next} = Alg, R0}) ->
+    %% Generate a 56 bit number without using the weak low bits.
+    %%
+    %% Be sure to use only 53 bits when multiplying with
+    %% math:pow(2.0, -N) to avoid rounding which would make
+    %% "even" floats more probable than "odd".
+    %%
+    {V1, R1} = Next(R0),
+    M1 = V1 bsr (Bits - 56),
+    if
+        ?BIT(55) =< M1 ->
+            %% We have 56 bits - waste 3
+            {(M1 bsr 3) * math:pow(2.0, -53), {Alg, R1}};
+        ?BIT(54) =< M1 ->
+            %% We have 55 bits - waste 2
+            {(M1 bsr 2) * math:pow(2.0, -54), {Alg, R1}};
+        ?BIT(53) =< M1 ->
+            %% We have 54 bits - waste 1
+            {(M1 bsr 1) * math:pow(2.0, -55), {Alg, R1}};
+        ?BIT(52) =< M1 ->
+            %% We have 53 bits - use all
+            {M1 * math:pow(2.0, -56), {Alg, R1}};
+        true ->
+            %% Need more bits
+            {V2, R2} = Next(R1),
+            uniform_real_s(Alg, Next, M1, -56, R2, V2, Bits)
+    end;
+uniform_real_s({#{max:=_, next:=Next} = Alg, R0}) ->
+    %% Generate a 56 bit number.
+    %% Ignore the weak low bits for these old algorithms,
+    %% just produce something reasonable.
+    %%
+    %% Be sure to use only 53 bits when multiplying with
+    %% math:pow(2.0, -N) to avoid rounding which would make
+    %% "even" floats more probable than "odd".
+    %%
+    {V1, R1} = Next(R0),
+    M1 = ?MASK(56, V1),
+    if
+        ?BIT(55) =< M1 ->
+            %% We have 56 bits - waste 3
+            {(M1 bsr 3) * math:pow(2.0, -53), {Alg, R1}};
+        ?BIT(54) =< M1 ->
+            %% We have 55 bits - waste 2
+            {(M1 bsr 2) * math:pow(2.0, -54), {Alg, R1}};
+        ?BIT(53) =< M1 ->
+            %% We have 54 bits - waste 1
+            {(M1 bsr 1) * math:pow(2.0, -55), {Alg, R1}};
+        ?BIT(52) =< M1 ->
+            %% We have 53 bits - use all
+            {M1 * math:pow(2.0, -56), {Alg, R1}};
+        true ->
+            %% Need more bits
+            {V2, R2} = Next(R1),
+            uniform_real_s(Alg, Next, M1, -56, R2, V2, 56)
+    end.
+
+uniform_real_s(Alg, _Next, M0, -1064, R1, V1, Bits) -> % 19*56
+    %% This is a very theoretical bottom case.
+    %% The odds of getting here is about 2^-1008,
+    %% through a white box test case, or thanks to
+    %% a malfunctioning PRNG producing 18 56-bit zeros in a row.
+    %%
+    %% Fill up to 53 bits, we have at most 52
+    B0 = (53 - ?BC(M0, 52)), % Missing bits
+    {(((M0 bsl B0) bor (V1 bsr (Bits - B0))) * math:pow(2.0, -1064 - B0)),
+     {Alg, R1}};
+uniform_real_s(Alg, Next, M0, BitNo, R1, V1, Bits) ->
+    if
+        %% Optimize the most probable.
+        %% Fill up to 53 bits.
+        ?BIT(51) =< M0 ->
+            %% We have 52 bits in M0 - need 1
+            {(((M0 bsl 1) bor (V1 bsr (Bits - 1)))
+              * math:pow(2.0, BitNo - 1)),
+             {Alg, R1}};
+        ?BIT(50) =< M0 ->
+            %% We have 51 bits in M0 - need 2
+            {(((M0 bsl 2) bor (V1 bsr (Bits - 2)))
+              * math:pow(2.0, BitNo - 2)),
+             {Alg, R1}};
+        ?BIT(49) =< M0 ->
+            %% We have 50 bits in M0 - need 3
+            {(((M0 bsl 3) bor (V1 bsr (Bits - 3)))
+              * math:pow(2.0, BitNo - 3)),
+             {Alg, R1}};
+        M0 == 0 ->
+            M1 = V1 bsr (Bits - 56),
+            if
+                ?BIT(55) =< M1 ->
+                    %% We have 56 bits - waste 3
+                    {(M1 bsr 3) * math:pow(2.0, BitNo - 53), {Alg, R1}};
+                ?BIT(54) =< M1 ->
+                    %% We have 55 bits - waste 2
+                    {(M1 bsr 2) * math:pow(2.0, BitNo - 54), {Alg, R1}};
+                ?BIT(53) =< M1 ->
+                    %% We have 54 bits - waste 1
+                    {(M1 bsr 1) * math:pow(2.0, BitNo - 55), {Alg, R1}};
+                ?BIT(52) =< M1 ->
+                    %% We have 53 bits - use all
+                    {M1 * math:pow(2.0, BitNo - 56), {Alg, R1}};
+                BitNo =:= -1008 ->
+                    %% Endgame
+                    %% For the last round we can not have 14 zeros or more
+                    %% at the top of M1 because then we will underflow,
+                    %% so we need at least 43 bits
+                    if
+                        ?BIT(42) =< M1 ->
+                            %% We have 43 bits - get the last bits
+                            uniform_real_s(Alg, Next, M1, BitNo - 56, R1);
+                        true ->
+                            %% Would underflow 2^-1022 - start all over
+                            %%
+                            %% We could just crash here since the odds for
+                            %% the PRNG being broken is much higher than
+                            %% for a good PRNG generating this many zeros
+                            %% in a row.  Maybe we should write an error
+                            %% report or call this a system limit...?
+                            uniform_real_s({Alg, R1})
+                    end;
+                true ->
+                    %% Need more bits
+                    uniform_real_s(Alg, Next, M1, BitNo - 56, R1)
+            end;
+        true ->
+            %% Fill up to 53 bits
+            B0 = 53 - ?BC(M0, 49), % Number of bits we need to append
+            {(((M0 bsl B0) bor (V1 bsr (Bits - B0)))
+              * math:pow(2.0, BitNo - B0)),
+             {Alg, R1}}
+    end.
+%%
+uniform_real_s(#{bits:=Bits} = Alg, Next, M0, BitNo, R0) ->
+    {V1, R1} = Next(R0),
+    uniform_real_s(Alg, Next, M0, BitNo, R1, V1, Bits);
+uniform_real_s(#{max:=_} = Alg, Next, M0, BitNo, R0) ->
+    {V1, R1} = Next(R0),
+    uniform_real_s(Alg, Next, M0, BitNo, R1, ?MASK(56, V1), 56).
+
 %% jump/1: given a state, jump/1
 %% returns a new state which is equivalent to that
 %% after a large number of call defined for each algorithm.
@@ -1025,3 +1219,42 @@ normal_fi(Indx) ->
 	     1.0214971439701471e-02,8.6165827693987316e-03,7.0508754713732268e-03,
 	     5.5224032992509968e-03,4.0379725933630305e-03,2.6090727461021627e-03,
 	     1.2602859304985975e-03}).
+
+%%%bitcount64(0) -> 0;
+%%%bitcount64(V) -> 1 + bitcount(V, 64).
+%%%
+%%%-define(
+%%%   BITCOUNT(V, N),
+%%%   bitcount(V, N) ->
+%%%       if
+%%%           (1 bsl ((N) bsr 1)) =< (V) ->
+%%%               ((N) bsr 1) + bitcount((V) bsr ((N) bsr 1), ((N) bsr 1));
+%%%           true ->
+%%%               bitcount((V), ((N) bsr 1))
+%%%       end).
+%%%?BITCOUNT(V, 64);
+%%%?BITCOUNT(V, 32);
+%%%?BITCOUNT(V, 16);
+%%%?BITCOUNT(V, 8);
+%%%?BITCOUNT(V, 4);
+%%%?BITCOUNT(V, 2);
+%%%bitcount(_, 1) -> 0.
+
+bc64(V) -> ?BC(V, 64).
+
+%% Linear from high bit - higher probability first gives faster execution
+bc(V, B, N) when B =< V -> N;
+bc(V, B, N) -> bc(V, B bsr 1, N - 1).
+    
+make_float(S, E, M) ->
+    <<F/float>> = <<S:1, E:11, M:52>>,
+    F.
+
+float2str(N) ->
+    <<S:1, E:11, M:52>> = <<(float(N))/float>>,
+    lists:flatten(
+      io_lib:format(
+      "~c~c.~13.16.0bE~b",
+      [case S of 1 -> $-; 0 -> $+ end,
+       case E of 0 -> $0; _ -> $1 end,
+       M, E - 16#3ff])).
diff --git a/lib/stdlib/src/sets.erl b/lib/stdlib/src/sets.erl
index c65a13b22e..ac0fc80526 100644
--- a/lib/stdlib/src/sets.erl
+++ b/lib/stdlib/src/sets.erl
@@ -37,7 +37,7 @@
 -module(sets).
 
 %% Standard interface.
--export([new/0,is_set/1,size/1,to_list/1,from_list/1]).
+-export([new/0,is_set/1,size/1,is_empty/1,to_list/1,from_list/1]).
 -export([is_element/2,add_element/2,del_element/2]).
 -export([union/2,union/1,intersection/2,intersection/1]).
 -export([is_disjoint/2]).
@@ -96,6 +96,12 @@ is_set(_) -> false.
       Set :: set().
 size(S) -> S#set.size. 
 
+%% is_empty(Set) -> boolean().
+%%  Return 'true' if Set is an empty set, otherwise 'false'.
+-spec is_empty(Set) -> boolean() when
+      Set :: set().
+is_empty(S) -> S#set.size=:=0.
+
 %% to_list(Set) -> [Elem].
 %%  Return the elements in Set as a list.
 -spec to_list(Set) -> List when
diff --git a/lib/stdlib/src/shell.erl b/lib/stdlib/src/shell.erl
index 212b143b1d..e4153e7899 100644
--- a/lib/stdlib/src/shell.erl
+++ b/lib/stdlib/src/shell.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -645,8 +645,7 @@ eval_exprs(Es, Shell, Bs0, RT, Lf, Ef, W) ->
     catch 
         exit:normal ->
             exit(normal);
-        Class:Reason ->
-            Stacktrace = erlang:get_stacktrace(),
+        Class:Reason:Stacktrace ->
             M = {self(),Class,{Reason,Stacktrace}},
             case do_catch(Class, Reason) of
                 true ->
@@ -701,7 +700,9 @@ exprs([E0|Es], Bs1, RT, Lf, Ef, Bs0, W) ->
                                 {W,V0};
                             true -> case result_will_be_saved() of
                                      true -> V0;
-                                     false -> ignored
+                                     false ->
+                                         erlang:garbage_collect(),
+                                         ignored
                                  end
                         end,
                     {{value,V,Bs,get()},Bs};
@@ -805,8 +806,8 @@ restrict_handlers(RShMod, Shell, RT) ->
 
 -define(BAD_RETURN(M, F, V),
         try erlang:error(reason)
-        catch _:_ -> erlang:raise(exit, {restricted_shell_bad_return,V}, 
-                                  [{M,F,3} | erlang:get_stacktrace()])
+        catch _:_:S -> erlang:raise(exit, {restricted_shell_bad_return,V}, 
+                                    [{M,F,3} | S])
         end).
 
 local_allowed(F, As, RShMod, Bs, Shell, RT) when is_atom(F) ->
diff --git a/lib/stdlib/src/stdlib.app.src b/lib/stdlib/src/stdlib.app.src
index ab0824ca17..5fb48acfab 100644
--- a/lib/stdlib/src/stdlib.app.src
+++ b/lib/stdlib/src/stdlib.app.src
@@ -101,6 +101,7 @@
 	     timer,
 	     unicode,
              unicode_util,
+	     uri_string,
 	     win32reg,
 	     zip]},
   {registered,[timer_server,rsh_starter,take_over_monitor,pool_master,
diff --git a/lib/stdlib/src/string.erl b/lib/stdlib/src/string.erl
index 5a4d2df2a6..0736374f21 100644
--- a/lib/stdlib/src/string.erl
+++ b/lib/stdlib/src/string.erl
@@ -74,29 +74,20 @@
 -export([to_upper/1, to_lower/1]).
 %%
 -import(lists,[member/2]).
-
 -compile({no_auto_import,[length/1]}).
+-compile({inline, [btoken/2, rev/1, append/2, stack/2, search_compile/1]}).
+-define(ASCII_LIST(CP1,CP2), CP1 < 256, CP2 < 256, CP1 =/= $\r).
 
 -export_type([grapheme_cluster/0]).
 
 -type grapheme_cluster() :: char() | [char()].
 -type direction() :: 'leading' | 'trailing'.
 
--dialyzer({no_improper_lists, stack/2}).
+-dialyzer({no_improper_lists, [stack/2, length_b/3]}).
 %%% BIFs internal (not documented) should not to be used outside of this module
 %%% May be removed
 -export([list_to_float/1, list_to_integer/1]).
 
--deprecated([{len,1},{concat,2},
-             {str,2},{chr,2},{rchr,2},{rstr,2},
-             {span,2},{cspan,2},{substr,'_'},{tokens,2},
-             {chars,'_'},
-             {copies,2},{words,'_'},{strip,'_'},
-             {sub_word,'_'},{left,'_'},{right,'_'},
-             {sub_string,'_'},{centre,'_'},{join,2},
-             {to_upper,1}, {to_lower,1}
-            ]).
-
 %% Uses bifs: string:list_to_float/1 and string:list_to_integer/1
 -spec list_to_float(String) -> {Float, Rest} | {'error', Reason} when
       String :: string(),
@@ -127,8 +118,10 @@ is_empty(_) -> false.
 
 %% Count the number of grapheme clusters in chardata
 -spec length(String::unicode:chardata()) -> non_neg_integer().
+length(<<CP1/utf8, Bin/binary>>) ->
+    length_b(Bin, CP1, 0);
 length(CD) ->
-    length_1(unicode_util:gc(CD), 0).
+    length_1(CD, 0).
 
 %% Convert a string to a list of grapheme clusters
 -spec to_graphemes(String::unicode:chardata()) -> [grapheme_cluster()].
@@ -176,6 +169,8 @@ equal(A, B, true, Norm) ->
 
 %% Reverse grapheme clusters
 -spec reverse(String::unicode:chardata()) -> [grapheme_cluster()].
+reverse(<<CP1/utf8, Rest/binary>>) ->
+    reverse_b(Rest, CP1, []);
 reverse(CD) ->
     reverse_1(CD, []).
 
@@ -186,7 +181,10 @@ reverse(CD) ->
       Start :: non_neg_integer(),
       Slice :: unicode:chardata().
 slice(CD, N) when is_integer(N), N >= 0 ->
-    slice_l(CD, N, is_binary(CD)).
+    case slice_l0(CD, N) of
+        [] when is_binary(CD) -> <<>>;
+        Res -> Res
+    end.
 
 -spec slice(String, Start, Length) -> Slice when
       String::unicode:chardata(),
@@ -195,9 +193,15 @@ slice(CD, N) when is_integer(N), N >= 0 ->
       Slice :: unicode:chardata().
 slice(CD, N, Length)
   when is_integer(N), N >= 0, is_integer(Length), Length > 0 ->
-    slice_trail(slice_l(CD, N, is_binary(CD)), Length);
+    case slice_l0(CD, N) of
+        [] when is_binary(CD) -> <<>>;
+        L -> slice_trail(L, Length)
+    end;
 slice(CD, N, infinity) ->
-    slice_l(CD, N, is_binary(CD));
+    case slice_l0(CD, N) of
+        [] when is_binary(CD) -> <<>>;
+        Res -> Res
+    end;
 slice(CD, _, 0) ->
     case is_binary(CD) of
         true  -> <<>>;
@@ -256,18 +260,22 @@ trim(Str, Dir) ->
       Dir :: direction() | 'both',
       Characters :: [grapheme_cluster()].
 trim(Str, _, []) -> Str;
+trim(Str, leading, [Sep]) when is_list(Str), Sep < 256 ->
+    trim_ls(Str, Sep);
 trim(Str, leading, Sep) when is_list(Sep) ->
-    trim_l(Str, search_pattern(Sep));
-trim(Str, trailing, Sep) when is_list(Sep) ->
-    trim_t(Str, 0, search_pattern(Sep));
-trim(Str, both, Sep0) when is_list(Sep0) ->
-    Sep = search_pattern(Sep0),
-    trim_t(trim_l(Str,Sep), 0, Sep).
+    trim_l(Str, Sep);
+trim(Str, trailing, [Sep]) when is_list(Str), Sep < 256 ->
+    trim_ts(Str, Sep);
+trim(Str, trailing, Seps0) when is_list(Seps0) ->
+    Seps = search_pattern(Seps0),
+    trim_t(Str, 0, Seps);
+trim(Str, both, Sep) when is_list(Sep) ->
+    trim(trim(Str,leading,Sep), trailing, Sep).
 
 %% Delete trailing newlines or \r\n
 -spec chomp(String::unicode:chardata()) -> unicode:chardata().
 chomp(Str) ->
-    trim_t(Str,0, {[[$\r,$\n],$\n], [$\r,$\n], [<<$\r>>,<<$\n>>]}).
+    trim(Str, trailing, [[$\r,$\n],$\n]).
 
 %% Split String into two parts where the leading part consists of Characters
 -spec take(String, Characters) -> {Leading, Trailing} when
@@ -300,8 +308,7 @@ take(Str, [], Complement, Dir) ->
         {true,  leading} -> {Str, Empty};
         {true,  trailing} -> {Empty, Str}
     end;
-take(Str, Sep0, false, leading) ->
-    Sep = search_pattern(Sep0),
+take(Str, Sep, false, leading) ->
     take_l(Str, Sep, []);
 take(Str, Sep0, true, leading) ->
     Sep = search_pattern(Sep0),
@@ -403,10 +410,12 @@ to_number(_, Number, Rest, _, Tail) ->
 %% Return the remaining string with prefix removed or else nomatch
 -spec prefix(String::unicode:chardata(), Prefix::unicode:chardata()) ->
                     'nomatch' | unicode:chardata().
-prefix(Str, []) -> Str;
 prefix(Str, Prefix0) ->
-    Prefix = unicode:characters_to_list(Prefix0),
-    case prefix_1(Str, Prefix) of
+    Result = case unicode:characters_to_list(Prefix0) of
+                 [] -> Str;
+                 Prefix -> prefix_1(Str, Prefix)
+             end,
+    case Result of
         [] when is_binary(Str) -> <<>>;
         Res -> Res
     end.
@@ -461,6 +470,7 @@ replace(String, SearchPattern, Replacement, Where) ->
               SeparatorList::[grapheme_cluster()]) ->
                      [unicode:chardata()].
 lexemes([], _) -> [];
+lexemes(Str, []) -> [Str];
 lexemes(Str, Seps0) when is_list(Seps0) ->
     Seps = search_pattern(Seps0),
     lexemes_m(Str, Seps, []).
@@ -494,13 +504,13 @@ find(String, SearchPattern, leading) ->
 find(String, SearchPattern, trailing) ->
     find_r(String, unicode:characters_to_list(SearchPattern), nomatch).
 
-%% Fetch first codepoint and return rest in tail
+%% Fetch first grapheme cluster and return rest in tail
 -spec next_grapheme(String::unicode:chardata()) ->
                            maybe_improper_list(grapheme_cluster(),unicode:chardata()) |
                            {error,unicode:chardata()}.
 next_grapheme(CD) -> unicode_util:gc(CD).
 
-%% Fetch first grapheme cluster and return rest in tail
+%% Fetch first codepoint and return rest in tail
 -spec next_codepoint(String::unicode:chardata()) ->
                             maybe_improper_list(char(),unicode:chardata()) |
                             {error,unicode:chardata()}.
@@ -508,10 +518,23 @@ next_codepoint(CD) -> unicode_util:cp(CD).
 
 %% Internals
 
-length_1([_|Rest], N) ->
-    length_1(unicode_util:gc(Rest), N+1);
-length_1([], N) ->
-    N.
+length_1([CP1|[CP2|_]=Cont], N) when ?ASCII_LIST(CP1,CP2) ->
+    length_1(Cont, N+1);
+length_1(Str, N) ->
+    case unicode_util:gc(Str) of
+        [] -> N;
+        [_|Rest] -> length_1(Rest, N+1)
+    end.
+
+length_b(<<CP2/utf8, Rest/binary>>, CP1, N)
+  when ?ASCII_LIST(CP1,CP2) ->
+    length_b(Rest, CP2, N+1);
+length_b(Bin0, CP1, N) ->
+    [_|Bin1] = unicode_util:gc([CP1|Bin0]),
+    case unicode_util:cp(Bin1) of
+        [] -> N+1;
+        [CP3|Bin] -> length_b(Bin, CP3, N+1)
+    end.
 
 equal_1([A|AR], [B|BR]) when is_integer(A), is_integer(B) ->
     A =:= B andalso equal_1(AR, BR);
@@ -550,29 +573,66 @@ equal_norm_nocase(A0, B0, Norm) ->
         {L1,L2} when is_list(L1), is_list(L2) -> false
     end.
 
+reverse_1([CP1|[CP2|_]=Cont], Acc) when ?ASCII_LIST(CP1,CP2) ->
+    reverse_1(Cont, [CP1|Acc]);
 reverse_1(CD, Acc) ->
     case unicode_util:gc(CD) of
         [GC|Rest] -> reverse_1(Rest, [GC|Acc]);
         [] -> Acc
     end.
 
-slice_l(CD, N, Binary) when N > 0 ->
+reverse_b(<<CP2/utf8, Rest/binary>>, CP1, Acc)
+  when ?ASCII_LIST(CP1,CP2) ->
+    reverse_b(Rest, CP2,  [CP1|Acc]);
+reverse_b(Bin0, CP1, Acc) ->
+    [GC|Bin1] = unicode_util:gc([CP1|Bin0]),
+    case unicode_util:cp(Bin1) of
+        [] -> [GC|Acc];
+        [CP3|Bin] -> reverse_b(Bin, CP3, [GC|Acc])
+    end.
+
+slice_l0(<<CP1/utf8, Bin/binary>>, N) when N > 0 ->
+    slice_lb(Bin, CP1, N);
+slice_l0(L, N) ->
+    slice_l(L, N).
+
+slice_l([CP1|[CP2|_]=Cont], N) when ?ASCII_LIST(CP1,CP2),N > 0 ->
+    slice_l(Cont, N-1);
+slice_l(CD, N) when N > 0 ->
     case unicode_util:gc(CD) of
-        [_|Cont] -> slice_l(Cont, N-1, Binary);
-        [] when Binary -> <<>>;
+        [_|Cont] -> slice_l(Cont, N-1);
         [] -> []
     end;
-slice_l(Cont, 0, Binary) ->
-    case is_empty(Cont) of
-        true when Binary -> <<>>;
-        _ -> Cont
+slice_l(Cont, 0) ->
+    Cont.
+
+slice_lb(<<CP2/utf8, Bin/binary>>, CP1, N) when ?ASCII_LIST(CP1,CP2), N > 1 ->
+    slice_lb(Bin, CP2, N-1);
+slice_lb(Bin, CP1, N) ->
+    [_|Rest] = unicode_util:gc([CP1|Bin]),
+    if N > 1 ->
+            case unicode_util:cp(Rest) of
+                [CP2|Cont] -> slice_lb(Cont, CP2, N-1);
+                [] -> <<>>
+            end;
+       N =:= 1 ->
+            Rest
     end.
 
+slice_trail(Orig, N) when is_binary(Orig) ->
+    case Orig of
+        <<CP1/utf8, Bin/binary>> when N > 0 ->
+            Length = slice_bin(Bin, CP1, N),
+            Sz = byte_size(Orig) - Length,
+            <<Keep:Sz/binary, _/binary>> = Orig,
+            Keep;
+        _ -> <<>>
+    end;
 slice_trail(CD, N) when is_list(CD) ->
-    slice_list(CD, N);
-slice_trail(CD, N) when is_binary(CD) ->
-    slice_bin(CD, N, CD).
+    slice_list(CD, N).
 
+slice_list([CP1|[CP2|_]=Cont], N) when ?ASCII_LIST(CP1,CP2),N > 0 ->
+    [CP1|slice_list(Cont, N-1)];
 slice_list(CD, N) when N > 0 ->
     case unicode_util:gc(CD) of
         [GC|Cont] -> append(GC, slice_list(Cont, N-1));
@@ -581,17 +641,16 @@ slice_list(CD, N) when N > 0 ->
 slice_list(_, 0) ->
     [].
 
-slice_bin(CD, N, Orig) when N > 0 ->
-    case unicode_util:gc(CD) of
-        [_|Cont] -> slice_bin(Cont, N-1, Orig);
-        [] -> Orig
+slice_bin(<<CP2/utf8, Bin/binary>>, CP1, N) when ?ASCII_LIST(CP1,CP2), N > 0 ->
+    slice_bin(Bin, CP2, N-1);
+slice_bin(CD, CP1, N) when N > 0 ->
+    [_|Bin] = unicode_util:gc([CP1|CD]),
+    case unicode_util:cp(Bin) of
+        [CP2|Cont] -> slice_bin(Cont, CP2, N-1);
+        [] -> 0
     end;
-slice_bin([], 0, Orig) ->
-    Orig;
-slice_bin(CD, 0, Orig) ->
-    Sz = byte_size(Orig) - byte_size(CD),
-    <<Keep:Sz/binary, _/binary>> = Orig,
-    Keep.
+slice_bin(CD, CP1, 0) ->
+    byte_size(CD)+byte_size(<<CP1/utf8>>).
 
 uppercase_list(CPs0) ->
     case unicode_util:uppercase(CPs0) of
@@ -641,16 +700,31 @@ casefold_bin(CPs0, Acc) ->
         [] -> Acc
     end.
 
-
+%% Fast path for ascii searching for one character in lists
+trim_ls([CP1|[CP2|_]=Cont]=Str, Sep)
+  when ?ASCII_LIST(CP1,CP2) ->
+    case Sep of
+        CP1 -> trim_ls(Cont, Sep);
+        _ -> Str
+    end;
+trim_ls(Str, Sep) ->
+    trim_l(Str, [Sep]).
+
+trim_l([CP1|[CP2|_]=Cont]=Str, Sep)
+  when ?ASCII_LIST(CP1,CP2) ->
+    case lists:member(CP1, Sep) of
+        true -> trim_l(Cont, Sep);
+        false -> Str
+    end;
 trim_l([Bin|Cont0], Sep) when is_binary(Bin) ->
     case bin_search_inv(Bin, Cont0, Sep) of
         {nomatch, Cont} -> trim_l(Cont, Sep);
         Keep -> Keep
     end;
-trim_l(Str, {GCs, _, _}=Sep) when is_list(Str) ->
+trim_l(Str, Sep) when is_list(Str) ->
     case unicode_util:gc(Str) of
         [C|Cs] ->
-            case lists:member(C, GCs) of
+            case lists:member(C, Sep) of
                 true -> trim_l(Cs, Sep);
                 false -> Str
             end;
@@ -662,15 +736,51 @@ trim_l(Bin, Sep) when is_binary(Bin) ->
         [Keep] -> Keep
     end.
 
-trim_t([Bin|Cont0], N, Sep) when is_binary(Bin) ->
+%% Fast path for ascii searching for one character in lists
+trim_ts([Sep|Cs1]=Str, Sep) ->
+    case Cs1 of
+        [] -> [];
+        [CP2|_] when ?ASCII_LIST(Sep,CP2) ->
+            Tail = trim_ts(Cs1, Sep),
+            case is_empty(Tail) of
+                true -> [];
+                false -> [Sep|Tail]
+            end;
+        _ ->
+            trim_t(Str, 0, search_pattern([Sep]))
+    end;
+trim_ts([CP|Cont],Sep) when is_integer(CP) ->
+    [CP|trim_ts(Cont, Sep)];
+trim_ts(Str, Sep) ->
+    trim_t(Str, 0, search_pattern([Sep])).
+
+trim_t([CP1|Cont]=Cs0, _, {GCs,CPs,_}=Seps) when is_integer(CP1) ->
+    case lists:member(CP1, CPs) of
+        true ->
+            [GC|Cs1] = unicode_util:gc(Cs0),
+            case lists:member(GC, GCs) of
+                true ->
+                    Tail = trim_t(Cs1, 0, Seps),
+                    case is_empty(Tail) of
+                        true -> [];
+                        false -> append(GC,Tail)
+                    end;
+                false ->
+                    append(GC,trim_t(Cs1, 0, Seps))
+            end;
+        false ->
+            [CP1|trim_t(Cont, 0, Seps)]
+    end;
+trim_t([Bin|Cont0], N, {GCs,_,_}=Seps0) when is_binary(Bin) ->
     <<_:N/binary, Rest/binary>> = Bin,
-    case bin_search(Rest, Cont0, Sep) of
+    Seps = search_compile(Seps0),
+    case bin_search(Rest, Cont0, Seps) of
         {nomatch,_} ->
-            stack(Bin, trim_t(Cont0, 0, Sep));
+            stack(Bin, trim_t(Cont0, 0, Seps));
         [SepStart|Cont1] ->
-            case bin_search_inv(SepStart, Cont1, Sep) of
+            case bin_search_inv(SepStart, Cont1, GCs) of
                 {nomatch, Cont} ->
-                    Tail = trim_t(Cont, 0, Sep),
+                    Tail = trim_t(Cont, 0, Seps),
                     case is_empty(Tail) of
                         true ->
                             KeepSz = byte_size(Bin) - byte_size(SepStart),
@@ -682,67 +792,69 @@ trim_t([Bin|Cont0], N, Sep) when is_binary(Bin) ->
                     end;
                 [NonSep|Cont] when is_binary(NonSep) ->
                     KeepSz = byte_size(Bin) - byte_size(NonSep),
-                    trim_t([Bin|Cont], KeepSz, Sep)
+                    trim_t([Bin|Cont], KeepSz, Seps)
             end
     end;
-trim_t(Str, 0, {GCs,CPs,_}=Sep) when is_list(Str) ->
-    case unicode_util:cp(Str) of
-        [CP|Cs] ->
-            case lists:member(CP, CPs) of
+trim_t(Str, 0, {GCs,_,_}=Seps) when is_list(Str) ->
+    case unicode_util:gc(Str) of
+        [GC|Cs1] ->
+            case lists:member(GC, GCs) of
                 true ->
-                    [GC|Cs1] = unicode_util:gc(Str),
-                    case lists:member(GC, GCs) of
-                        true ->
-                            Tail = trim_t(Cs1, 0, Sep),
-                            case is_empty(Tail) of
-                                true -> [];
-                                false -> append(GC,Tail)
-                            end;
-                        false ->
-                            append(GC,trim_t(Cs1, 0, Sep))
+                    Tail = trim_t(Cs1, 0, Seps),
+                    case is_empty(Tail) of
+                        true -> [];
+                        false -> append(GC,Tail)
                     end;
                 false ->
-                    append(CP,trim_t(Cs, 0, Sep))
+                    append(GC,trim_t(Cs1, 0, Seps))
             end;
         [] -> []
     end;
-trim_t(Bin, N, Sep) when is_binary(Bin) ->
+trim_t(Bin, N, {GCs,_,_}=Seps0) when is_binary(Bin) ->
     <<_:N/binary, Rest/binary>> = Bin,
-    case bin_search(Rest, Sep) of
+    Seps = search_compile(Seps0),
+    case bin_search(Rest, [], Seps) of
         {nomatch,_} -> Bin;
         [SepStart] ->
-            case bin_search_inv(SepStart, [], Sep) of
+            case bin_search_inv(SepStart, [], GCs) of
                 {nomatch,_} ->
                     KeepSz = byte_size(Bin) - byte_size(SepStart),
                     <<Keep:KeepSz/binary, _/binary>> = Bin,
                     Keep;
                 [NonSep] ->
                     KeepSz = byte_size(Bin) - byte_size(NonSep),
-                    trim_t(Bin, KeepSz, Sep)
+                    trim_t(Bin, KeepSz, Seps)
             end
     end.
 
-take_l([Bin|Cont0], Sep, Acc) when is_binary(Bin) ->
-    case bin_search_inv(Bin, Cont0, Sep) of
+
+take_l([CP1|[CP2|_]=Cont]=Str, Seps, Acc)
+  when ?ASCII_LIST(CP1,CP2) ->
+    case lists:member(CP1, Seps) of
+        true -> take_l(Cont, Seps, [CP1|Acc]);
+        false -> {rev(Acc), Str}
+    end;
+take_l([Bin|Cont0], Seps, Acc) when is_binary(Bin) ->
+    case bin_search_inv(Bin, Cont0, Seps) of
         {nomatch, Cont} ->
             Used = cp_prefix(Cont0, Cont),
-            take_l(Cont, Sep, [unicode:characters_to_binary([Bin|Used])|Acc]);
+            take_l(Cont, Seps, [unicode:characters_to_binary([Bin|Used])|Acc]);
         [Bin1|_]=After when is_binary(Bin1) ->
             First = byte_size(Bin) - byte_size(Bin1),
             <<Keep:First/binary, _/binary>> = Bin,
             {btoken(Keep,Acc), After}
     end;
-take_l(Str, {GCs, _, _}=Sep, Acc) when is_list(Str) ->
+take_l(Str, Seps, Acc) when is_list(Str) ->
     case unicode_util:gc(Str) of
         [C|Cs] ->
-            case lists:member(C, GCs) of
-                true -> take_l(Cs, Sep, append(rev(C),Acc));
+            case lists:member(C, Seps) of
+                true -> take_l(Cs, Seps, append(rev(C),Acc));
                 false -> {rev(Acc), Str}
             end;
         [] -> {rev(Acc), []}
     end;
-take_l(Bin, Sep, Acc) when is_binary(Bin) ->
-    case bin_search_inv(Bin, [], Sep) of
+take_l(Bin, Seps, Acc) when is_binary(Bin) ->
+    case bin_search_inv(Bin, [], Seps) of
         {nomatch,_} ->
             {btoken(Bin, Acc), <<>>};
         [After] ->
@@ -751,27 +863,41 @@ take_l(Bin, Sep, Acc) when is_binary(Bin) ->
             {btoken(Keep, Acc), After}
     end.
 
-take_lc([Bin|Cont0], Sep, Acc) when is_binary(Bin) ->
-    case bin_search(Bin, Cont0, Sep) of
+
+take_lc([CP1|Cont]=Str0, {GCs,CPs,_}=Seps, Acc) when is_integer(CP1) ->
+    case lists:member(CP1, CPs) of
+        true ->
+            [GC|Str] = unicode_util:gc(Str0),
+            case lists:member(GC, GCs) of
+                false -> take_lc(Str, Seps, append(rev(GC),Acc));
+                true  -> {rev(Acc), Str0}
+            end;
+        false ->
+            take_lc(Cont, Seps, append(CP1,Acc))
+    end;
+take_lc([Bin|Cont0], Seps0, Acc) when is_binary(Bin) ->
+    Seps = search_compile(Seps0),
+    case bin_search(Bin, Cont0, Seps) of
         {nomatch, Cont} ->
             Used = cp_prefix(Cont0, Cont),
-            take_lc(Cont, Sep, [unicode:characters_to_binary([Bin|Used])|Acc]);
+            take_lc(Cont, Seps, [unicode:characters_to_binary([Bin|Used])|Acc]);
         [Bin1|_]=After when is_binary(Bin1) ->
             First = byte_size(Bin) - byte_size(Bin1),
             <<Keep:First/binary, _/binary>> = Bin,
             {btoken(Keep,Acc), After}
     end;
-take_lc(Str, {GCs, _, _}=Sep, Acc) when is_list(Str) ->
+take_lc(Str, {GCs,_,_}=Seps, Acc) when is_list(Str) ->
     case unicode_util:gc(Str) of
         [C|Cs] ->
             case lists:member(C, GCs) of
-                false -> take_lc(Cs, Sep, append(rev(C),Acc));
+                false -> take_lc(Cs, Seps, append(rev(C),Acc));
                 true  -> {rev(Acc), Str}
             end;
         [] -> {rev(Acc), []}
     end;
-take_lc(Bin, Sep, Acc) when is_binary(Bin) ->
-    case bin_search(Bin, [], Sep) of
+take_lc(Bin, Seps0, Acc) when is_binary(Bin) ->
+    Seps = search_compile(Seps0),
+    case bin_search(Bin, [], Seps) of
         {nomatch,_} ->
             {btoken(Bin, Acc), <<>>};
         [After] ->
@@ -780,148 +906,192 @@ take_lc(Bin, Sep, Acc) when is_binary(Bin) ->
             {btoken(Keep, Acc), After}
     end.
 
-take_t([Bin|Cont0], N, Sep) when is_binary(Bin) ->
+
+take_t([CP1|Cont]=Str0, _, {GCs,CPs,_}=Seps) when is_integer(CP1) ->
+    case lists:member(CP1, CPs) of
+        true ->
+            [GC|Str] = unicode_util:gc(Str0),
+            case lists:member(GC, GCs) of
+                true ->
+                    {Head, Tail} = take_t(Str, 0, Seps),
+                    case is_empty(Head) of
+                        true ->  {Head, append(GC,Tail)};
+                        false -> {append(GC,Head), Tail}
+                    end;
+                false ->
+                    {Head, Tail} = take_t(Str, 0, Seps),
+                    {append(GC,Head), Tail}
+            end;
+        false ->
+            {Head, Tail} = take_t(Cont, 0, Seps),
+            {[CP1|Head], Tail}
+    end;
+take_t([Bin|Cont0], N, {GCs,_,_}=Seps0) when is_binary(Bin) ->
     <<_:N/binary, Rest/binary>> = Bin,
-    case bin_search(Rest, Cont0, Sep) of
+    Seps = search_compile(Seps0),
+    case bin_search(Rest, Cont0, Seps) of
         {nomatch,Cont} ->
             Used = cp_prefix(Cont0, Cont),
-            {Head, Tail} = take_t(Cont, 0, Sep),
+            {Head, Tail} = take_t(Cont, 0, Seps),
             {stack(unicode:characters_to_binary([Bin|Used]), Head), Tail};
         [SepStart|Cont1] ->
-            case bin_search_inv(SepStart, Cont1, Sep) of
+            case bin_search_inv(SepStart, Cont1, GCs) of
                 {nomatch, Cont} ->
-                    {Head, Tail} = take_t(Cont, 0, Sep),
+                    {Head, Tail} = take_t(Cont, 0, Seps),
                     Used = cp_prefix(Cont0, Cont),
-                    case equal(Tail, Cont) of
+                    case is_empty(Head) of
                         true ->
                             KeepSz = byte_size(Bin) - byte_size(SepStart),
                             <<Keep:KeepSz/binary, End/binary>> = Bin,
-                            {stack(Keep,Head), stack(stack(End,Used),Tail)};
+                            {Keep, stack(stack(End,Used),Tail)};
                         false ->
                             {stack(unicode:characters_to_binary([Bin|Used]),Head), Tail}
                     end;
                 [NonSep|Cont] when is_binary(NonSep) ->
                     KeepSz = byte_size(Bin) - byte_size(NonSep),
-                    take_t([Bin|Cont], KeepSz, Sep)
+                    take_t([Bin|Cont], KeepSz, Seps)
             end
     end;
-take_t(Str, 0, {GCs,CPs,_}=Sep) when is_list(Str) ->
-    case unicode_util:cp(Str) of
-        [CP|Cs] ->
-            case lists:member(CP, CPs) of
+take_t(Str, 0, {GCs,_,_}=Seps) when is_list(Str) ->
+    case unicode_util:gc(Str) of
+        [GC|Cs1] ->
+            case lists:member(GC, GCs) of
                 true ->
-                    [GC|Cs1] = unicode_util:gc(Str),
-                    case lists:member(GC, GCs) of
-                        true ->
-                            {Head, Tail} = take_t(Cs1, 0, Sep),
-                            case equal(Tail, Cs1) of
-                                true -> {Head, append(GC,Tail)};
-                                false -> {append(GC,Head), Tail}
-                            end;
-                        false ->
-                            {Head, Tail} = take_t(Cs, 0, Sep),
-                            {append(CP,Head), Tail}
+                    {Head, Tail} = take_t(Cs1, 0, Seps),
+                    case is_empty(Head) of
+                        true ->  {Head, append(GC,Tail)};
+                        false -> {append(GC,Head), Tail}
                     end;
                 false ->
-                    {Head, Tail} = take_t(Cs, 0, Sep),
-                    {append(CP,Head), Tail}
+                    {Head, Tail} = take_t(Cs1, 0, Seps),
+                    {append(GC,Head), Tail}
             end;
         [] -> {[],[]}
     end;
-take_t(Bin, N, Sep) when is_binary(Bin) ->
+take_t(Bin, N, {GCs,_,_}=Seps0) when is_binary(Bin) ->
     <<_:N/binary, Rest/binary>> = Bin,
-    case bin_search(Rest, Sep) of
+    Seps = search_compile(Seps0),
+    case bin_search(Rest, [], Seps) of
         {nomatch,_} -> {Bin, <<>>};
         [SepStart] ->
-            case bin_search_inv(SepStart, [], Sep) of
+            case bin_search_inv(SepStart, [], GCs) of
                 {nomatch,_} ->
                     KeepSz = byte_size(Bin) - byte_size(SepStart),
                     <<Before:KeepSz/binary, End/binary>> = Bin,
                     {Before, End};
                 [NonSep] ->
                     KeepSz = byte_size(Bin) - byte_size(NonSep),
-                    take_t(Bin, KeepSz, Sep)
+                    take_t(Bin, KeepSz, Seps)
             end
     end.
 
-take_tc([Bin|Cont0], N, Sep) when is_binary(Bin) ->
+take_tc([CP1|[CP2|_]=Cont], _, {GCs,_,_}=Seps) when ?ASCII_LIST(CP1,CP2) ->
+    case lists:member(CP1, GCs) of
+        false ->
+            {Head, Tail} = take_tc(Cont, 0, Seps),
+            case is_empty(Head) of
+                true -> {Head, append(CP1,Tail)};
+                false -> {append(CP1,Head), Tail}
+            end;
+        true ->
+            {Head, Tail} = take_tc(Cont, 0, Seps),
+            {append(CP1,Head), Tail}
+    end;
+take_tc([Bin|Cont0], N, {GCs,_,_}=Seps0) when is_binary(Bin) ->
     <<_:N/binary, Rest/binary>> = Bin,
-    case bin_search_inv(Rest, Cont0, Sep) of
+    case bin_search_inv(Rest, Cont0, GCs) of
         {nomatch,Cont} ->
             Used = cp_prefix(Cont0, Cont),
-            {Head, Tail} = take_tc(Cont, 0, Sep),
+            {Head, Tail} = take_tc(Cont, 0, Seps0),
             {stack(unicode:characters_to_binary([Bin|Used]), Head), Tail};
         [SepStart|Cont1] ->
-            case bin_search(SepStart, Cont1, Sep) of
+            Seps = search_compile(Seps0),
+            case bin_search(SepStart, Cont1, Seps) of
                 {nomatch, Cont} ->
-                    {Head, Tail} = take_tc(Cont, 0, Sep),
+                    {Head, Tail} = take_tc(Cont, 0, Seps),
                     Used = cp_prefix(Cont0, Cont),
-                    case equal(Tail, Cont) of
+                    case is_empty(Head) of
                         true ->
                             KeepSz = byte_size(Bin) - byte_size(SepStart),
                             <<Keep:KeepSz/binary, End/binary>> = Bin,
-                            {stack(Keep,Head), stack(stack(End,Used),Tail)};
+                            {Keep, stack(stack(End,Used),Tail)};
                         false ->
                             {stack(unicode:characters_to_binary([Bin|Used]),Head), Tail}
                     end;
                 [NonSep|Cont] when is_binary(NonSep) ->
                     KeepSz = byte_size(Bin) - byte_size(NonSep),
-                    take_tc([Bin|Cont], KeepSz, Sep)
+                    take_tc([Bin|Cont], KeepSz, Seps)
             end
     end;
-take_tc(Str, 0, {GCs,CPs,_}=Sep) when is_list(Str) ->
-    case unicode_util:cp(Str) of
-        [CP|Cs] ->
-            case lists:member(CP, CPs) of
-                true ->
-                    [GC|Cs1] = unicode_util:gc(Str),
-                    case lists:member(GC, GCs) of
-                        false ->
-                            {Head, Tail} = take_tc(Cs1, 0, Sep),
-                            case equal(Tail, Cs1) of
-                                true -> {Head, append(GC,Tail)};
-                                false -> {append(GC,Head), Tail}
-                            end;
-                        true ->
-                            {Head, Tail} = take_tc(Cs1, 0, Sep),
-                            {append(GC,Head), Tail}
-                    end;
+take_tc(Str, 0, {GCs,_,_}=Seps) when is_list(Str) ->
+    case unicode_util:gc(Str) of
+        [GC|Cs1] ->
+            case lists:member(GC, GCs) of
                 false ->
-                    {Head, Tail} = take_tc(Cs, 0, Sep),
-                    case equal(Tail, Cs) of
-                        true  -> {Head, append(CP,Tail)};
-                        false -> {append(CP,Head), Tail}
-                    end
+                    {Head, Tail} = take_tc(Cs1, 0, Seps),
+                    case is_empty(Head) of
+                        true -> {Head, append(GC,Tail)};
+                        false -> {append(GC,Head), Tail}
+                    end;
+                true ->
+                    {Head, Tail} = take_tc(Cs1, 0, Seps),
+                    {append(GC,Head), Tail}
             end;
         [] -> {[],[]}
     end;
-take_tc(Bin, N, Sep) when is_binary(Bin) ->
+take_tc(Bin, N, {GCs,_,_}=Seps0) when is_binary(Bin) ->
     <<_:N/binary, Rest/binary>> = Bin,
-    case bin_search_inv(Rest, [], Sep) of
+    case bin_search_inv(Rest, [], GCs) of
         {nomatch,_} -> {Bin, <<>>};
         [SepStart] ->
-            case bin_search(SepStart, [], Sep) of
+            Seps = search_compile(Seps0),
+            case bin_search(SepStart, [], Seps) of
                 {nomatch,_} ->
                     KeepSz = byte_size(Bin) - byte_size(SepStart),
                     <<Before:KeepSz/binary, End/binary>> = Bin,
                     {Before, End};
                 [NonSep] ->
                     KeepSz = byte_size(Bin) - byte_size(NonSep),
-                    take_tc(Bin, KeepSz, Sep)
+                    take_tc(Bin, KeepSz, Seps)
             end
     end.
 
-prefix_1(Cs, []) -> Cs;
-prefix_1(Cs, [_]=Pre) ->
-    prefix_2(unicode_util:gc(Cs), Pre);
-prefix_1(Cs, Pre) ->
-    prefix_2(unicode_util:cp(Cs), Pre).
-
-prefix_2([C|Cs], [C|Pre]) ->
-    prefix_1(Cs, Pre);
-prefix_2(_, _) ->
-    nomatch.
+prefix_1(Cs0, [GC]) ->
+    case unicode_util:gc(Cs0) of
+        [GC|Cs] -> Cs;
+        _ -> nomatch
+    end;
+prefix_1([CP|Cs], [Pre|PreR]) when is_integer(CP) ->
+    case CP =:= Pre of
+        true -> prefix_1(Cs,PreR);
+        false -> nomatch
+    end;
+prefix_1(<<CP/utf8, Cs/binary>>, [Pre|PreR]) ->
+    case CP =:= Pre of
+        true -> prefix_1(Cs,PreR);
+        false -> nomatch
+    end;
+prefix_1(Cs0, [Pre|PreR]) ->
+    case unicode_util:cp(Cs0) of
+        [Pre|Cs] ->  prefix_1(Cs,PreR);
+        _ -> nomatch
+    end.
 
+split_1([CP1|Cs]=Cs0, [C|_]=Needle, _, Where, Curr, Acc) when is_integer(CP1) ->
+    case CP1=:=C of
+        true ->
+            case prefix_1(Cs0, Needle) of
+                nomatch -> split_1(Cs, Needle, 0, Where, append(C,Curr), Acc);
+                Rest when Where =:= leading ->
+                    [rev(Curr), Rest];
+                Rest when Where =:= trailing ->
+                    split_1(Cs, Needle, 0, Where, [C|Curr], [rev(Curr), Rest]);
+                Rest when Where =:= all ->
+                    split_1(Rest, Needle, 0, Where, [], [rev(Curr)|Acc])
+            end;
+        false ->
+            split_1(Cs, Needle, 0, Where, append(CP1,Curr), Acc)
+    end;
 split_1([Bin|Cont0], Needle, Start, Where, Curr0, Acc)
   when is_binary(Bin) ->
     case bin_search_str(Bin, Start, Cont0, Needle) of
@@ -981,32 +1151,50 @@ split_1(Bin, [_C|_]=Needle, Start, Where, Curr0, Acc) ->
             end
     end.
 
-lexemes_m([Bin|Cont0], Seps, Ts) when is_binary(Bin) ->
-    case bin_search_inv(Bin, Cont0, Seps) of
+lexemes_m([CP|_]=Cs0, {GCs,CPs,_}=Seps, Ts) when is_integer(CP) ->
+    case lists:member(CP, CPs) of
+        true ->
+            [GC|Cs2] = unicode_util:gc(Cs0),
+            case lists:member(GC, GCs) of
+                true ->
+                    lexemes_m(Cs2, Seps, Ts);
+                false ->
+                    {Lexeme,Rest} = lexeme_pick(Cs0, Seps, []),
+                    lexemes_m(Rest, Seps, [Lexeme|Ts])
+            end;
+        false ->
+            {Lexeme,Rest} = lexeme_pick(Cs0, Seps, []),
+            lexemes_m(Rest, Seps, [Lexeme|Ts])
+    end;
+lexemes_m([Bin|Cont0], {GCs,_,_}=Seps0, Ts) when is_binary(Bin) ->
+    case bin_search_inv(Bin, Cont0, GCs) of
         {nomatch,Cont} ->
-            lexemes_m(Cont, Seps, Ts);
+            lexemes_m(Cont, Seps0, Ts);
         Cs ->
+            Seps = search_compile(Seps0),
             {Lexeme,Rest} = lexeme_pick(Cs, Seps, []),
             lexemes_m(Rest, Seps, [Lexeme|Ts])
     end;
-lexemes_m(Cs0, {GCs, _, _}=Seps, Ts) when is_list(Cs0) ->
+lexemes_m(Cs0, {GCs, _, _}=Seps0, Ts) when is_list(Cs0) ->
     case unicode_util:gc(Cs0) of
         [C|Cs] ->
             case lists:member(C, GCs) of
                 true  ->
-                    lexemes_m(Cs, Seps, Ts);
+                    lexemes_m(Cs, Seps0, Ts);
                 false ->
+                    Seps = search_compile(Seps0),
                     {Lexeme,Rest} = lexeme_pick(Cs0, Seps, []),
                     lexemes_m(Rest, Seps, [Lexeme|Ts])
             end;
         [] ->
             lists:reverse(Ts)
     end;
-lexemes_m(Bin, Seps, Ts) when is_binary(Bin) ->
-    case bin_search_inv(Bin, [], Seps) of
+lexemes_m(Bin, {GCs,_,_}=Seps0, Ts) when is_binary(Bin) ->
+    case bin_search_inv(Bin, [], GCs) of
         {nomatch,_} ->
             lists:reverse(Ts);
         [Cs] ->
+            Seps = search_compile(Seps0),
             {Lexeme,Rest} = lexeme_pick(Cs, Seps, []),
             lexemes_m(Rest, Seps, add_non_empty(Lexeme,Ts))
     end.
@@ -1037,7 +1225,7 @@ lexeme_pick(Cs0, {GCs, CPs, _} = Seps, Tkn) when is_list(Cs0) ->
                 true ->
                     [GC|Cs2] = unicode_util:gc(Cs0),
                     case lists:member(GC, GCs) of
-                        true -> {rev(Tkn), Cs0};
+                        true -> {rev(Tkn), Cs2};
                         false -> lexeme_pick(Cs2, Seps, append(rev(GC),Tkn))
                     end;
                 false ->
@@ -1047,7 +1235,7 @@ lexeme_pick(Cs0, {GCs, CPs, _} = Seps, Tkn) when is_list(Cs0) ->
             {rev(Tkn), []}
     end;
 lexeme_pick(Bin, Seps, Tkn) when is_binary(Bin) ->
-    case bin_search(Bin, Seps) of
+    case bin_search(Bin, [], Seps) of
         {nomatch,_} ->
             {btoken(Bin,Tkn), []};
         [Left] ->
@@ -1056,35 +1244,38 @@ lexeme_pick(Bin, Seps, Tkn) when is_binary(Bin) ->
             {btoken(Lexeme, Tkn), Left}
     end.
 
-nth_lexeme_m([Bin|Cont0], Seps, N) when is_binary(Bin) ->
-    case bin_search_inv(Bin, Cont0, Seps) of
+nth_lexeme_m([Bin|Cont0], {GCs,_,_}=Seps0, N) when is_binary(Bin) ->
+    case bin_search_inv(Bin, Cont0, GCs) of
         {nomatch,Cont} ->
-            nth_lexeme_m(Cont, Seps, N);
+            nth_lexeme_m(Cont, Seps0, N);
         Cs when N > 1 ->
-            Rest = lexeme_skip(Cs, Seps),
-            nth_lexeme_m(Rest, Seps, N-1);
+            Rest = lexeme_skip(Cs, Seps0),
+            nth_lexeme_m(Rest, Seps0, N-1);
         Cs ->
+            Seps = search_compile(Seps0),
             {Lexeme,_} = lexeme_pick(Cs, Seps, []),
             Lexeme
     end;
-nth_lexeme_m(Cs0, {GCs, _, _}=Seps, N) when is_list(Cs0) ->
+nth_lexeme_m(Cs0, {GCs, _, _}=Seps0, N) when is_list(Cs0) ->
     case unicode_util:gc(Cs0) of
         [C|Cs] ->
             case lists:member(C, GCs) of
                 true ->
-                    nth_lexeme_m(Cs, Seps, N);
+                    nth_lexeme_m(Cs, Seps0, N);
                 false when N > 1 ->
-                    Cs1 = lexeme_skip(Cs, Seps),
-                    nth_lexeme_m(Cs1, Seps, N-1);
+                    Cs1 = lexeme_skip(Cs, Seps0),
+                    nth_lexeme_m(Cs1, Seps0, N-1);
                 false ->
+                    Seps = search_compile(Seps0),
                     {Lexeme,_} = lexeme_pick(Cs0, Seps, []),
                     Lexeme
             end;
         [] ->
             []
     end;
-nth_lexeme_m(Bin, Seps, N) when is_binary(Bin) ->
-    case bin_search_inv(Bin, [], Seps) of
+nth_lexeme_m(Bin, {GCs,_,_}=Seps0, N) when is_binary(Bin) ->
+    Seps = search_compile(Seps0),
+    case bin_search_inv(Bin, [], GCs) of
         [Cs] when N > 1 ->
             Cs1 = lexeme_skip(Cs, Seps),
             nth_lexeme_m(Cs1, Seps, N-1);
@@ -1100,16 +1291,17 @@ lexeme_skip([CP|Cs1]=Cs0, {GCs,CPs,_}=Seps) when is_integer(CP) ->
         true  ->
             [GC|Cs2] = unicode_util:gc(Cs0),
             case lists:member(GC, GCs) of
-                true -> Cs0;
+                true -> Cs2;
                 false -> lexeme_skip(Cs2, Seps)
             end;
         false ->
             lexeme_skip(Cs1, Seps)
     end;
-lexeme_skip([Bin|Cont0], Seps) when is_binary(Bin) ->
+lexeme_skip([Bin|Cont0], Seps0) when is_binary(Bin) ->
+    Seps = search_compile(Seps0),
     case bin_search(Bin, Cont0, Seps) of
         {nomatch,_} -> lexeme_skip(Cont0, Seps);
-        Cs -> Cs
+        Cs -> tl(unicode_util:gc(Cs))
     end;
 lexeme_skip(Cs0, {GCs, CPs, _} = Seps) when is_list(Cs0) ->
     case unicode_util:cp(Cs0) of
@@ -1118,7 +1310,7 @@ lexeme_skip(Cs0, {GCs, CPs, _} = Seps) when is_list(Cs0) ->
                 true ->
                     [GC|Cs2] = unicode_util:gc(Cs0),
                     case lists:member(GC, GCs) of
-                        true -> Cs0;
+                        true -> Cs2;
                         false -> lexeme_skip(Cs2, Seps)
                     end;
                 false ->
@@ -1127,12 +1319,23 @@ lexeme_skip(Cs0, {GCs, CPs, _} = Seps) when is_list(Cs0) ->
         [] ->
             []
     end;
-lexeme_skip(Bin, Seps) when is_binary(Bin) ->
-    case bin_search(Bin, Seps) of
+lexeme_skip(Bin, Seps0) when is_binary(Bin) ->
+    Seps = search_compile(Seps0),
+    case bin_search(Bin, [], Seps) of
         {nomatch,_} -> <<>>;
-        [Left] -> Left
+        [Left] -> tl(unicode_util:gc(Left))
     end.
 
+find_l([C1|Cs]=Cs0, [C|_]=Needle) when is_integer(C1) ->
+    case C1 of
+        C ->
+            case prefix_1(Cs0, Needle) of
+                nomatch -> find_l(Cs, Needle);
+                _ -> Cs0
+            end;
+        _ ->
+            find_l(Cs, Needle)
+    end;
 find_l([Bin|Cont0], Needle) when is_binary(Bin) ->
     case bin_search_str(Bin, 0, Cont0, Needle) of
         {nomatch, _, Cont} ->
@@ -1157,6 +1360,16 @@ find_l(Bin, Needle) ->
         {_Before, [Cs], _After} -> Cs
     end.
 
+find_r([Cp|Cs]=Cs0, [C|_]=Needle, Res) when is_integer(Cp) ->
+    case Cp of
+        C ->
+            case prefix_1(Cs0, Needle) of
+                nomatch -> find_r(Cs, Needle, Res);
+                _ -> find_r(Cs, Needle, Cs0)
+            end;
+        _ ->
+            find_r(Cs, Needle, Res)
+    end;
 find_r([Bin|Cont0], Needle, Res) when is_binary(Bin) ->
     case bin_search_str(Bin, 0, Cont0, Needle) of
         {nomatch,_,Cont} ->
@@ -1227,11 +1440,6 @@ cp_prefix_1(Orig, Until, Cont) ->
 
 
 %% Binary special
-bin_search(Bin, Seps) ->
-    bin_search(Bin, [], Seps).
-
-bin_search(_Bin, Cont, {[],_,_}) ->
-    {nomatch, Cont};
 bin_search(Bin, Cont, {Seps,_,BP}) ->
     bin_search_loop(Bin, 0, BP, Cont, Seps).
 
@@ -1239,10 +1447,14 @@ bin_search(Bin, Cont, {Seps,_,BP}) ->
 %% i.e. å in nfd form  $a "COMBINING RING ABOVE"
 %% and PREPEND characters like "ARABIC NUMBER SIGN" 1536 <<216,128>>
 %% combined with other characters are currently ignored.
+search_pattern({_,_,_}=P) -> P;
 search_pattern(Seps) ->
     CPs = search_cp(Seps),
-    Bin = bin_pattern(CPs),
-    {Seps, CPs, Bin}.
+    {Seps, CPs, undefined}.
+
+search_compile({Sep, CPs, undefined}) ->
+    {Sep, CPs, binary:compile_pattern(bin_pattern(CPs))};
+search_compile({_,_,_}=Compiled) -> Compiled.
 
 search_cp([CP|Seps]) when is_integer(CP) ->
     [CP|search_cp(Seps)];
@@ -1263,9 +1475,21 @@ bin_search_loop(Bin0, Start, BinSeps, Cont, Seps) ->
     case binary:match(Bin, BinSeps) of
         nomatch ->
             {nomatch,Cont};
+        {Where, _CL} when Cont =:= [] ->
+            <<_:Where/binary, Cont1/binary>> = Bin,
+            [GC|Cont2] = unicode_util:gc(Cont1),
+            case lists:member(GC, Seps) of
+                false when Cont2 =:= [] ->
+                    {nomatch, []};
+                false ->
+                    Next = byte_size(Bin0) - byte_size(Cont2),
+                    bin_search_loop(Bin0, Next, BinSeps, Cont, Seps);
+                true ->
+                    [Cont1]
+            end;
         {Where, _CL} ->
             <<_:Where/binary, Cont0/binary>> = Bin,
-            Cont1 = stack(Cont0, Cont),
+            Cont1 = [Cont0|Cont],
             [GC|Cont2] = unicode_util:gc(Cont1),
             case lists:member(GC, Seps) of
                 false ->
@@ -1273,55 +1497,108 @@ bin_search_loop(Bin0, Start, BinSeps, Cont, Seps) ->
                         [BinR|Cont] when is_binary(BinR) ->
                             Next = byte_size(Bin0) - byte_size(BinR),
                             bin_search_loop(Bin0, Next, BinSeps, Cont, Seps);
-                        BinR when is_binary(BinR), Cont =:= [] ->
-                            Next = byte_size(Bin0) - byte_size(BinR),
-                            bin_search_loop(Bin0, Next, BinSeps, Cont, Seps);
                         _ ->
                             {nomatch, Cont2}
                     end;
-                true when is_list(Cont1) ->
-                    Cont1;
                 true ->
-                    [Cont1]
+                    Cont1
             end
     end.
 
-bin_search_inv(Bin, Cont, {[], _, _}) ->
-    [Bin|Cont];
-bin_search_inv(Bin, Cont, {[Sep], _, _}) ->
-    bin_search_inv_1([Bin|Cont], Sep);
-bin_search_inv(Bin, Cont, {Seps, _, _}) ->
-    bin_search_inv_n([Bin|Cont], Seps).
-
-bin_search_inv_1([<<>>|CPs], _) ->
-    {nomatch, CPs};
-bin_search_inv_1(CPs = [Bin0|Cont], Sep) when is_binary(Bin0) ->
-    case unicode_util:gc(CPs) of
-        [Sep|Bin] when is_binary(Bin), Cont =:= [] ->
-            bin_search_inv_1([Bin], Sep);
-        [Sep|[Bin|Cont]=Cs] when is_binary(Bin) ->
-            bin_search_inv_1(Cs, Sep);
-        [Sep|Cs] ->
-            {nomatch, Cs};
-        _ -> CPs
-    end.
+bin_search_inv(<<>>, Cont, _) ->
+    {nomatch, Cont};
+bin_search_inv(Bin, Cont, [Sep]) ->
+    bin_search_inv_1(Bin, Cont, Sep);
+bin_search_inv(Bin, Cont, Seps) ->
+    bin_search_inv_n(Bin, Cont, Seps).
+
+bin_search_inv_1(<<CP1/utf8, BinRest/binary>>=Bin0, Cont, Sep) ->
+    case BinRest of
+        <<CP2/utf8, _/binary>> when ?ASCII_LIST(CP1, CP2) ->
+            case CP1 of
+                Sep -> bin_search_inv_1(BinRest, Cont, Sep);
+                _ -> [Bin0|Cont]
+            end;
+        _ when Cont =:= [] ->
+            case unicode_util:gc(Bin0) of
+                [Sep|Bin] -> bin_search_inv_1(Bin, Cont, Sep);
+                _ -> [Bin0|Cont]
+            end;
+        _ ->
+            case unicode_util:gc([Bin0|Cont]) of
+                [Sep|[Bin|Cont]] when is_binary(Bin) ->
+                    bin_search_inv_1(Bin, Cont, Sep);
+                [Sep|Cs] ->
+                    {nomatch, Cs};
+                _ -> [Bin0|Cont]
+            end
+    end;
+bin_search_inv_1(<<>>, Cont, _Sep) ->
+    {nomatch, Cont};
+bin_search_inv_1([], Cont, _Sep) ->
+    {nomatch, Cont}.
 
-bin_search_inv_n([<<>>|CPs], _) ->
-    {nomatch, CPs};
-bin_search_inv_n([Bin0|Cont]=CPs, Seps) when is_binary(Bin0) ->
-    [C|Cs0] = unicode_util:gc(CPs),
-    case {lists:member(C, Seps), Cs0} of
-        {true, Cs} when is_binary(Cs), Cont =:= [] ->
-            bin_search_inv_n([Cs], Seps);
-        {true, [Bin|Cont]=Cs} when is_binary(Bin) ->
-            bin_search_inv_n(Cs, Seps);
-        {true, Cs} -> {nomatch, Cs};
-        {false, _} -> CPs
-    end.
 
+bin_search_inv_n(<<CP1/utf8, BinRest/binary>>=Bin0, Cont, Seps) ->
+    case BinRest of
+        <<CP2/utf8, _/binary>> when ?ASCII_LIST(CP1, CP2) ->
+            case lists:member(CP1,Seps) of
+                true -> bin_search_inv_n(BinRest, Cont, Seps);
+                false -> [Bin0|Cont]
+            end;
+        _ when Cont =:= [] ->
+            [GC|Bin] = unicode_util:gc(Bin0),
+            case lists:member(GC, Seps) of
+                true -> bin_search_inv_n(Bin, Cont, Seps);
+                false -> [Bin0|Cont]
+            end;
+        _ ->
+            [GC|Cs0] = unicode_util:gc([Bin0|Cont]),
+            case lists:member(GC, Seps) of
+                false -> [Bin0|Cont];
+                true ->
+                    case Cs0 of
+                        [Bin|Cont] when is_binary(Bin) ->
+                            bin_search_inv_n(Bin, Cont, Seps);
+                        _ ->
+                            {nomatch, Cs0}
+                    end
+            end
+    end;
+bin_search_inv_n(<<>>, Cont, _Sep) ->
+    {nomatch, Cont};
+bin_search_inv_n([], Cont, _Sep) ->
+    {nomatch, Cont}.
+
+bin_search_str(Bin0, Start, [], SearchCPs) ->
+    Compiled = binary:compile_pattern(unicode:characters_to_binary(SearchCPs)),
+    bin_search_str_1(Bin0, Start, Compiled, SearchCPs);
 bin_search_str(Bin0, Start, Cont, [CP|_]=SearchCPs) ->
+    First = binary:compile_pattern(<<CP/utf8>>),
+    bin_search_str_2(Bin0, Start, Cont, First, SearchCPs).
+
+bin_search_str_1(Bin0, Start, First, SearchCPs) ->
+    <<_:Start/binary, Bin/binary>> = Bin0,
+    case binary:match(Bin, First) of
+        nomatch -> {nomatch, byte_size(Bin0), []};
+        {Where0, _} ->
+            Where = Start+Where0,
+            <<Keep:Where/binary, Cs0/binary>> = Bin0,
+            case prefix_1(Cs0, SearchCPs) of
+                nomatch ->
+                    <<_/utf8, Cs/binary>> = Cs0,
+                    KeepSz = byte_size(Bin0) - byte_size(Cs),
+                    bin_search_str_1(Bin0, KeepSz, First, SearchCPs);
+                [] ->
+                    {Keep, [Cs0], <<>>};
+                Rest ->
+                    {Keep, [Cs0], Rest}
+            end
+    end.
+
+bin_search_str_2(Bin0, Start, Cont, First, SearchCPs) ->
     <<_:Start/binary, Bin/binary>> = Bin0,
-    case binary:match(Bin, <<CP/utf8>>) of
+    case binary:match(Bin, First) of
         nomatch -> {nomatch, byte_size(Bin0), Cont};
         {Where0, _} ->
             Where = Start+Where0,
@@ -1330,7 +1607,7 @@ bin_search_str(Bin0, Start, Cont, [CP|_]=SearchCPs) ->
             case prefix_1(stack(Cs0,Cont), SearchCPs) of
                 nomatch when is_binary(Cs) ->
                     KeepSz = byte_size(Bin0) - byte_size(Cs),
-                    bin_search_str(Bin0, KeepSz, Cont, SearchCPs);
+                    bin_search_str_2(Bin0, KeepSz, Cont, First, SearchCPs);
                 nomatch ->
                     {nomatch, Where, stack([GC|Cs],Cont)};
                 [] ->
diff --git a/lib/stdlib/src/supervisor.erl b/lib/stdlib/src/supervisor.erl
index 7920e55930..e56415650f 100644
--- a/lib/stdlib/src/supervisor.erl
+++ b/lib/stdlib/src/supervisor.erl
@@ -31,7 +31,6 @@
 %% Internal exports
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
 	 terminate/2, code_change/3, format_status/2]).
--export([try_again_restart/2]).
 
 %% For release_handler only
 -export([get_callback_module/1]).
@@ -79,6 +78,7 @@
                    | {RestartStrategy :: strategy(),
                       Intensity :: non_neg_integer(),
                       Period :: pos_integer()}.
+-type children() :: {Ids :: [child_id()], Db :: #{child_id() => child_rec()}}.
 
 %%--------------------------------------------------------------------------
 %% Defaults
@@ -96,7 +96,7 @@
 	        pid = undefined :: child()
 	                         | {restarting, pid() | undefined}
 	                         | [pid()],
-		name            :: child_id(),
+		id              :: child_id(),
 		mfargs          :: mfargs(),
 		restart_type    :: restart(),
 		shutdown        :: shutdown(),
@@ -104,16 +104,11 @@
 		modules = []    :: modules()}).
 -type child_rec() :: #child{}.
 
--define(DICTS, dict).
--define(DICT, dict:dict).
--define(SETS, sets).
--define(SET, sets:set).
-
 -record(state, {name,
 		strategy               :: strategy() | 'undefined',
-		children = []          :: [child_rec()],
-                dynamics               :: {'dict', ?DICT(pid(), list())}
-                                        | {'set', ?SET(pid())}
+		children = {[],#{}}    :: children(), % Ids in start order
+                dynamics               :: {'maps', #{pid() => list()}}
+                                        | {'sets', sets:set(pid())}
                                         | 'undefined',
 		intensity              :: non_neg_integer() | 'undefined',
 		period                 :: pos_integer() | 'undefined',
@@ -124,6 +119,9 @@
 -type state() :: #state{}.
 
 -define(is_simple(State), State#state.strategy =:= simple_one_for_one).
+-define(is_temporary(_Child_), _Child_#child.restart_type=:=temporary).
+-define(is_transient(_Child_), _Child_#child.restart_type=:=transient).
+-define(is_permanent(_Child_), _Child_#child.restart_type=:=permanent).
 
 -callback init(Args :: term()) ->
     {ok, {SupFlags :: sup_flags(), [ChildSpec :: child_spec()]}}
@@ -179,16 +177,16 @@ start_child(Supervisor, ChildSpec) ->
               | {'error', Error},
       Error :: 'running' | 'restarting' | 'not_found' | 'simple_one_for_one' |
 	       term().
-restart_child(Supervisor, Name) ->
-    call(Supervisor, {restart_child, Name}).
+restart_child(Supervisor, Id) ->
+    call(Supervisor, {restart_child, Id}).
 
 -spec delete_child(SupRef, Id) -> Result when
       SupRef :: sup_ref(),
       Id :: child_id(),
       Result :: 'ok' | {'error', Error},
       Error :: 'running' | 'restarting' | 'not_found' | 'simple_one_for_one'.
-delete_child(Supervisor, Name) ->
-    call(Supervisor, {delete_child, Name}).
+delete_child(Supervisor, Id) ->
+    call(Supervisor, {delete_child, Id}).
 
 %%-----------------------------------------------------------------
 %% Func: terminate_child/2
@@ -202,16 +200,16 @@ delete_child(Supervisor, Name) ->
       Id :: pid() | child_id(),
       Result :: 'ok' | {'error', Error},
       Error :: 'not_found' | 'simple_one_for_one'.
-terminate_child(Supervisor, Name) ->
-    call(Supervisor, {terminate_child, Name}).
+terminate_child(Supervisor, Id) ->
+    call(Supervisor, {terminate_child, Id}).
 
 -spec get_childspec(SupRef, Id) -> Result when
       SupRef :: sup_ref(),
       Id :: pid() | child_id(),
       Result :: {'ok', child_spec()} | {'error', Error},
       Error :: 'not_found'.
-get_childspec(Supervisor, Name) ->
-    call(Supervisor, {get_childspec, Name}).
+get_childspec(Supervisor, Id) ->
+    call(Supervisor, {get_childspec, Id}).
 
 -spec which_children(SupRef) -> [{Id,Child,Type,Modules}] when
       SupRef :: sup_ref(),
@@ -246,17 +244,6 @@ check_childspecs(ChildSpecs) when is_list(ChildSpecs) ->
 check_childspecs(X) -> {error, {badarg, X}}.
 
 %%%-----------------------------------------------------------------
-%%% Called by restart/2
--spec try_again_restart(SupRef, Child) -> ok when
-      SupRef :: sup_ref(),
-      Child :: child_id() | pid().
-try_again_restart(Supervisor, Child) ->
-    cast(Supervisor, {try_again_restart, Child}).
-
-cast(Supervisor, Req) ->
-    gen_server:cast(Supervisor, Req).
-
-%%%-----------------------------------------------------------------
 %%% Called by release_handler during upgrade
 -spec get_callback_module(Pid) -> Module when
       Pid :: pid(),
@@ -325,7 +312,7 @@ init_children(State, StartSpec) ->
 init_dynamic(State, [StartSpec]) ->
     case check_startspec([StartSpec]) of
         {ok, Children} ->
-	    {ok, State#state{children = Children}};
+	    {ok, dyn_init(State#state{children = Children})};
         Error ->
             {stop, {start_spec, Error}}
     end;
@@ -334,35 +321,34 @@ init_dynamic(_State, StartSpec) ->
 
 %%-----------------------------------------------------------------
 %% Func: start_children/2
-%% Args: Children = [child_rec()] in start order
+%% Args: Children = children() % Ids in start order
 %%       SupName = {local, atom()} | {global, atom()} | {pid(), Mod}
-%% Purpose: Start all children.  The new list contains #child's
+%% Purpose: Start all children.  The new map contains #child's
 %%          with pids.
 %% Returns: {ok, NChildren} | {error, NChildren, Reason}
-%%          NChildren = [child_rec()] in termination order (reversed
-%%                        start order)
+%%          NChildren = children() % Ids in termination order
+%%                                   (reversed start order)
 %%-----------------------------------------------------------------
-start_children(Children, SupName) -> start_children(Children, [], SupName).
-
-start_children([Child|Chs], NChildren, SupName) ->
-    case do_start_child(SupName, Child) of
-	{ok, undefined} when Child#child.restart_type =:= temporary ->
-	    start_children(Chs, NChildren, SupName);
-	{ok, Pid} ->
-	    start_children(Chs, [Child#child{pid = Pid}|NChildren], SupName);
-	{ok, Pid, _Extra} ->
-	    start_children(Chs, [Child#child{pid = Pid}|NChildren], SupName);
-	{error, Reason} ->
-	    report_error(start_error, Reason, Child, SupName),
-	    {error, lists:reverse(Chs) ++ [Child | NChildren],
-	     {failed_to_start_child,Child#child.name,Reason}}
-    end;
-start_children([], NChildren, _SupName) ->
-    {ok, NChildren}.
+start_children(Children, SupName) ->
+    Start =
+        fun(Id,Child) ->
+                case do_start_child(SupName, Child) of
+                    {ok, undefined} when ?is_temporary(Child) ->
+                        remove;
+                    {ok, Pid} ->
+                        {update,Child#child{pid = Pid}};
+                    {ok, Pid, _Extra} ->
+                        {update,Child#child{pid = Pid}};
+                    {error, Reason} ->
+                        report_error(start_error, Reason, Child, SupName),
+                        {abort,{failed_to_start_child,Id,Reason}}
+                end
+        end,
+    children_map(Start,Children).
 
 do_start_child(SupName, Child) ->
     #child{mfargs = {M, F, Args}} = Child,
-    case catch apply(M, F, Args) of
+    case do_start_child_i(M, F, Args) of
 	{ok, Pid} when is_pid(Pid) ->
 	    NChild = Child#child{pid = Pid},
 	    report_progress(NChild, SupName),
@@ -371,10 +357,8 @@ do_start_child(SupName, Child) ->
 	    NChild = Child#child{pid = Pid},
 	    report_progress(NChild, SupName),
 	    {ok, Pid, Extra};
-	ignore ->
-	    {ok, undefined};
-	{error, What} -> {error, What};
-	What -> {error, What}
+        Other ->
+            Other
     end.
 
 do_start_child_i(M, F, A) ->
@@ -400,17 +384,17 @@ do_start_child_i(M, F, A) ->
 -spec handle_call(call(), term(), state()) -> {'reply', term(), state()}.
 
 handle_call({start_child, EArgs}, _From, State) when ?is_simple(State) ->
-    Child = hd(State#state.children),
+    Child = get_dynamic_child(State),
     #child{mfargs = {M, F, A}} = Child,
     Args = A ++ EArgs,
     case do_start_child_i(M, F, Args) of
 	{ok, undefined} ->
 	    {reply, {ok, undefined}, State};
 	{ok, Pid} ->
-	    NState = save_dynamic_child(Child#child.restart_type, Pid, Args, State),
+	    NState = dyn_store(Pid, Args, State),
 	    {reply, {ok, Pid}, NState};
 	{ok, Pid, Extra} ->
-	    NState = save_dynamic_child(Child#child.restart_type, Pid, Args, State),
+	    NState = dyn_store(Pid, Args, State),
 	    {reply, {ok, Pid, Extra}, NState};
 	What ->
 	    {reply, What, State}
@@ -426,121 +410,94 @@ handle_call({start_child, ChildSpec}, _From, State) ->
     end;
 
 %% terminate_child for simple_one_for_one can only be done with pid
-handle_call({terminate_child, Name}, _From, State) when not is_pid(Name),
-							?is_simple(State) ->
+handle_call({terminate_child, Id}, _From, State) when not is_pid(Id),
+                                                      ?is_simple(State) ->
     {reply, {error, simple_one_for_one}, State};
 
-handle_call({terminate_child, Name}, _From, State) ->
-    case get_child(Name, State, ?is_simple(State)) of
-	{value, Child} ->
-	    case do_terminate(Child, State#state.name) of
-		#child{restart_type=RT} when RT=:=temporary; ?is_simple(State) ->
-		    {reply, ok, state_del_child(Child, State)};
-		NChild ->
-		    {reply, ok, replace_child(NChild, State)}
-		end;
-	false ->
+handle_call({terminate_child, Id}, _From, State) ->
+    case find_child(Id, State) of
+	{ok, Child} ->
+	    do_terminate(Child, State#state.name),
+            {reply, ok, del_child(Child, State)};
+	error ->
 	    {reply, {error, not_found}, State}
     end;
 
 %% restart_child request is invalid for simple_one_for_one supervisors
-handle_call({restart_child, _Name}, _From, State) when ?is_simple(State) ->
+handle_call({restart_child, _Id}, _From, State) when ?is_simple(State) ->
     {reply, {error, simple_one_for_one}, State};
 
-handle_call({restart_child, Name}, _From, State) ->
-    case get_child(Name, State) of
-	{value, Child} when Child#child.pid =:= undefined ->
+handle_call({restart_child, Id}, _From, State) ->
+    case find_child(Id, State) of
+	{ok, Child} when Child#child.pid =:= undefined ->
 	    case do_start_child(State#state.name, Child) of
 		{ok, Pid} ->
-		    NState = replace_child(Child#child{pid = Pid}, State),
+		    NState = set_pid(Pid, Id, State),
 		    {reply, {ok, Pid}, NState};
 		{ok, Pid, Extra} ->
-		    NState = replace_child(Child#child{pid = Pid}, State),
+		    NState = set_pid(Pid, Id, State),
 		    {reply, {ok, Pid, Extra}, NState};
 		Error ->
 		    {reply, Error, State}
 	    end;
-	{value, #child{pid=?restarting(_)}} ->
+	{ok, #child{pid=?restarting(_)}} ->
 	    {reply, {error, restarting}, State};
-	{value, _} ->
+	{ok, _} ->
 	    {reply, {error, running}, State};
 	_ ->
 	    {reply, {error, not_found}, State}
     end;
 
 %% delete_child request is invalid for simple_one_for_one supervisors
-handle_call({delete_child, _Name}, _From, State) when ?is_simple(State) ->
+handle_call({delete_child, _Id}, _From, State) when ?is_simple(State) ->
     {reply, {error, simple_one_for_one}, State};
 
-handle_call({delete_child, Name}, _From, State) ->
-    case get_child(Name, State) of
-	{value, Child} when Child#child.pid =:= undefined ->
-	    NState = remove_child(Child, State),
+handle_call({delete_child, Id}, _From, State) ->
+    case find_child(Id, State) of
+	{ok, Child} when Child#child.pid =:= undefined ->
+	    NState = remove_child(Id, State),
 	    {reply, ok, NState};
-	{value, #child{pid=?restarting(_)}} ->
+	{ok, #child{pid=?restarting(_)}} ->
 	    {reply, {error, restarting}, State};
-	{value, _} ->
+	{ok, _} ->
 	    {reply, {error, running}, State};
 	_ ->
 	    {reply, {error, not_found}, State}
     end;
 
-handle_call({get_childspec, Name}, _From, State) ->
-    case get_child(Name, State, ?is_simple(State)) of
-	{value, Child} ->
+handle_call({get_childspec, Id}, _From, State) ->
+    case find_child(Id, State) of
+	{ok, Child} ->
             {reply, {ok, child_to_spec(Child)}, State};
-	false ->
+	error ->
 	    {reply, {error, not_found}, State}
     end;
 
-handle_call(which_children, _From, #state{children = [#child{restart_type = temporary,
-							     child_type = CT,
-							     modules = Mods}]} =
-		State) when ?is_simple(State) ->
-    Reply = lists:map(fun(Pid) -> {undefined, Pid, CT, Mods} end,
-                      ?SETS:to_list(dynamics_db(temporary, State#state.dynamics))),
-    {reply, Reply, State};
-
-handle_call(which_children, _From, #state{children = [#child{restart_type = RType,
-							 child_type = CT,
-							 modules = Mods}]} =
-		State) when ?is_simple(State) ->
-    Reply = lists:map(fun({?restarting(_),_}) -> {undefined,restarting,CT,Mods};
-			 ({Pid, _}) -> {undefined, Pid, CT, Mods} end,
-		      ?DICTS:to_list(dynamics_db(RType, State#state.dynamics))),
+handle_call(which_children, _From, State) when ?is_simple(State) ->
+    #child{child_type = CT,modules = Mods} = get_dynamic_child(State),
+    Reply = dyn_map(fun(?restarting(_)) -> {undefined, restarting, CT, Mods};
+                       (Pid) -> {undefined, Pid, CT, Mods}
+                    end, State),
     {reply, Reply, State};
 
 handle_call(which_children, _From, State) ->
     Resp =
-	lists:map(fun(#child{pid = ?restarting(_), name = Name,
-			     child_type = ChildType, modules = Mods}) ->
-			  {Name, restarting, ChildType, Mods};
-		     (#child{pid = Pid, name = Name,
-			     child_type = ChildType, modules = Mods}) ->
-			  {Name, Pid, ChildType, Mods}
-		  end,
-		  State#state.children),
+	children_to_list(
+          fun(Id,#child{pid = ?restarting(_),
+                        child_type = ChildType, modules = Mods}) ->
+                  {Id, restarting, ChildType, Mods};
+             (Id,#child{pid = Pid,
+                        child_type = ChildType, modules = Mods}) ->
+                  {Id, Pid, ChildType, Mods}
+          end,
+          State#state.children),
     {reply, Resp, State};
 
-
-handle_call(count_children, _From, #state{children = [#child{restart_type = temporary,
-							     child_type = CT}]} = State)
-  when ?is_simple(State) ->
-    Sz = ?SETS:size(dynamics_db(temporary, State#state.dynamics)),
-    Reply = case CT of
-		supervisor -> [{specs, 1}, {active, Sz},
-			       {supervisors, Sz}, {workers, 0}];
-		worker -> [{specs, 1}, {active, Sz},
-			   {supervisors, 0}, {workers, Sz}]
-	    end,
-    {reply, Reply, State};
-
-handle_call(count_children, _From,  #state{dynamic_restarts = Restarts,
-					   children = [#child{restart_type = RType,
-							      child_type = CT}]} = State)
+handle_call(count_children, _From,  #state{dynamic_restarts = Restarts} = State)
   when ?is_simple(State) ->
-    Sz = ?DICTS:size(dynamics_db(RType, State#state.dynamics)),
-    Active = Sz - Restarts,
+    #child{child_type = CT} = get_dynamic_child(State),
+    Sz = dyn_size(State),
+    Active = Sz - Restarts, % Restarts is always 0 for temporary children
     Reply = case CT of
 		supervisor -> [{specs, 1}, {active, Active},
 			       {supervisors, Sz}, {workers, 0}];
@@ -552,16 +509,15 @@ handle_call(count_children, _From,  #state{dynamic_restarts = Restarts,
 handle_call(count_children, _From, State) ->
     %% Specs and children are together on the children list...
     {Specs, Active, Supers, Workers} =
-	lists:foldl(fun(Child, Counts) ->
-			   count_child(Child, Counts)
-		   end, {0,0,0,0}, State#state.children),
+	children_fold(fun(_Id, Child, Counts) ->
+                              count_child(Child, Counts)
+                      end, {0,0,0,0}, State#state.children),
 
     %% Reformat counts to a property list.
     Reply = [{specs, Specs}, {active, Active},
 	     {supervisors, Supers}, {workers, Workers}],
     {reply, Reply, State}.
 
-
 count_child(#child{pid = Pid, child_type = worker},
 	    {Specs, Active, Supers, Workers}) ->
     case is_pid(Pid) andalso is_process_alive(Pid) of
@@ -575,34 +531,15 @@ count_child(#child{pid = Pid, child_type = supervisor},
 	false -> {Specs+1, Active, Supers+1, Workers}
     end.
 
-
 %%% If a restart attempt failed, this message is cast
 %%% from restart/2 in order to give gen_server the chance to
 %%% check it's inbox before trying again.
--spec handle_cast({try_again_restart, child_id() | pid()}, state()) ->
+-spec handle_cast({try_again_restart, child_id() | {'restarting',pid()}}, state()) ->
 			 {'noreply', state()} | {stop, shutdown, state()}.
 
-handle_cast({try_again_restart,Pid}, #state{children=[Child]}=State)
-  when ?is_simple(State) ->
-    RT = Child#child.restart_type,
-    RPid = restarting(Pid),
-    case dynamic_child_args(RPid, RT, State#state.dynamics) of
-	{ok, Args} ->
-	    {M, F, _} = Child#child.mfargs,
-	    NChild = Child#child{pid = RPid, mfargs = {M, F, Args}},
-	    case restart(NChild,State) of
-		{ok, State1} ->
-		    {noreply, State1};
-		{shutdown, State1} ->
-		    {stop, shutdown, State1}
-	    end;
-	error ->
-            {noreply, State}
-    end;
-
-handle_cast({try_again_restart,Name}, State) ->
-    case lists:keyfind(Name,#child.name,State#state.children) of
-	Child = #child{pid=?restarting(_)} ->
+handle_cast({try_again_restart,TryAgainId}, State) ->
+    case find_child_and_args(TryAgainId, State) of
+	{ok, Child = #child{pid=?restarting(_)}} ->
 	    case restart(Child,State) of
 		{ok, State1} ->
 		    {noreply, State1};
@@ -637,10 +574,8 @@ handle_info(Msg, State) ->
 %%
 -spec terminate(term(), state()) -> 'ok'.
 
-terminate(_Reason, #state{children=[Child]} = State) when ?is_simple(State) ->
-    terminate_dynamic_children(Child, dynamics_db(Child#child.restart_type,
-                                                  State#state.dynamics),
-                               State#state.name);
+terminate(_Reason, State) when ?is_simple(State) ->
+    terminate_dynamic_children(State);
 terminate(_Reason, State) ->
     terminate_children(State#state.children, State#state.name).
 
@@ -675,8 +610,8 @@ code_change(_, State, _) ->
 
 update_childspec(State, StartSpec) when ?is_simple(State) ->
     case check_startspec(StartSpec) of
-        {ok, [Child]} ->
-            {ok, State#state{children = [Child]}};
+        {ok, {[_],_}=Children} ->
+            {ok, State#state{children = Children}};
         Error ->
             {error, Error}
     end;
@@ -690,39 +625,36 @@ update_childspec(State, StartSpec) ->
 	    {error, Error}
     end.
 
-update_childspec1([Child|OldC], Children, KeepOld) ->
-    case update_chsp(Child, Children) of
-	{ok,NewChildren} ->
-	    update_childspec1(OldC, NewChildren, KeepOld);
+update_childspec1({[Id|OldIds], OldDb}, {Ids,Db}, KeepOld) ->
+    case update_chsp(maps:get(Id,OldDb), Db) of
+	{ok,NewDb} ->
+	    update_childspec1({OldIds,OldDb}, {Ids,NewDb}, KeepOld);
 	false ->
-	    update_childspec1(OldC, Children, [Child|KeepOld])
+	    update_childspec1({OldIds,OldDb}, {Ids,Db}, [Id|KeepOld])
     end;
-update_childspec1([], Children, KeepOld) ->
+update_childspec1({[],OldDb}, {Ids,Db}, KeepOld) ->
+    KeepOldDb = maps:with(KeepOld,OldDb),
     %% Return them in (kept) reverse start order.
-    lists:reverse(Children ++ KeepOld).
-
-update_chsp(OldCh, Children) ->
-    case lists:map(fun(Ch) when OldCh#child.name =:= Ch#child.name ->
-			   Ch#child{pid = OldCh#child.pid};
-		      (Ch) ->
-			   Ch
-		   end,
-		   Children) of
-	Children ->
-	    false;  % OldCh not found in new spec.
-	NewC ->
-	    {ok, NewC}
+    {lists:reverse(Ids ++ KeepOld),maps:merge(KeepOldDb,Db)}.
+
+update_chsp(#child{id=Id}=OldChild, NewDb) ->
+    case maps:find(Id, NewDb) of
+        {ok,Child} ->
+            {ok,NewDb#{Id => Child#child{pid = OldChild#child.pid}}};
+        error -> % Id not found in new spec.
+            false
     end.
+
     
 %%% ---------------------------------------------------
 %%% Start a new child.
 %%% ---------------------------------------------------
 
 handle_start_child(Child, State) ->
-    case get_child(Child#child.name, State) of
-	false ->
+    case find_child(Child#child.id, State) of
+	error ->
 	    case do_start_child(State#state.name, Child) of
-		{ok, undefined} when Child#child.restart_type =:= temporary ->
+		{ok, undefined} when ?is_temporary(Child) ->
 		    {{ok, undefined}, State};
 		{ok, Pid} ->
 		    {{ok, Pid}, save_child(Child#child{pid = Pid}, State)};
@@ -731,9 +663,9 @@ handle_start_child(Child, State) ->
 		{error, What} ->
 		    {{error, {What, Child}}, State}
 	    end;
-	{value, OldChild} when is_pid(OldChild#child.pid) ->
+	{ok, OldChild} when is_pid(OldChild#child.pid) ->
 	    {{error, {already_started, OldChild#child.pid}}, State};
-	{value, _OldChild} ->
+	{ok, _OldChild} ->
 	    {{error, already_present}, State}
     end.
 
@@ -742,63 +674,45 @@ handle_start_child(Child, State) ->
 %%% Returns: {ok, state()} | {shutdown, state()}
 %%% ---------------------------------------------------
 
-restart_child(Pid, Reason, #state{children = [Child]} = State) when ?is_simple(State) ->
-    RestartType = Child#child.restart_type,
-    case dynamic_child_args(Pid, RestartType, State#state.dynamics) of
-	{ok, Args} ->
-	    {M, F, _} = Child#child.mfargs,
-	    NChild = Child#child{pid = Pid, mfargs = {M, F, Args}},
-	    do_restart(RestartType, Reason, NChild, State);
-	error ->
-            {ok, State}
-    end;
-
 restart_child(Pid, Reason, State) ->
-    Children = State#state.children,
-    case lists:keyfind(Pid, #child.pid, Children) of
-	#child{restart_type = RestartType} = Child ->
-	    do_restart(RestartType, Reason, Child, State);
-	false ->
+    case find_child_and_args(Pid, State) of
+        {ok, Child} ->
+	    do_restart(Reason, Child, State);
+	error ->
 	    {ok, State}
     end.
 
-do_restart(permanent, Reason, Child, State) ->
+do_restart(Reason, Child, State) when ?is_permanent(Child) ->
     report_error(child_terminated, Reason, Child, State#state.name),
     restart(Child, State);
-do_restart(_, normal, Child, State) ->
-    NState = state_del_child(Child, State),
+do_restart(normal, Child, State) ->
+    NState = del_child(Child, State),
     {ok, NState};
-do_restart(_, shutdown, Child, State) ->
-    NState = state_del_child(Child, State),
+do_restart(shutdown, Child, State) ->
+    NState = del_child(Child, State),
     {ok, NState};
-do_restart(_, {shutdown, _Term}, Child, State) ->
-    NState = state_del_child(Child, State),
+do_restart({shutdown, _Term}, Child, State) ->
+    NState = del_child(Child, State),
     {ok, NState};
-do_restart(transient, Reason, Child, State) ->
+do_restart(Reason, Child, State) when ?is_transient(Child) ->
     report_error(child_terminated, Reason, Child, State#state.name),
     restart(Child, State);
-do_restart(temporary, Reason, Child, State) ->
+do_restart(Reason, Child, State) when ?is_temporary(Child) ->
     report_error(child_terminated, Reason, Child, State#state.name),
-    NState = state_del_child(Child, State),
+    NState = del_child(Child, State),
     {ok, NState}.
 
 restart(Child, State) ->
     case add_restart(State) of
 	{ok, NState} ->
 	    case restart(NState#state.strategy, Child, NState) of
-		{try_again,NState2} ->
+		{{try_again, TryAgainId}, NState2} ->
 		    %% Leaving control back to gen_server before
 		    %% trying again. This way other incoming requsts
 		    %% for the supervisor can be handled - e.g. a
 		    %% shutdown request for the supervisor or the
 		    %% child.
-		    Id = if ?is_simple(State) -> Child#child.pid;
-			    true -> Child#child.name
-			 end,
-		    ok = try_again_restart(self(), Id),
-		    {ok,NState2};
-		{try_again, NState2, #child{name=ChName}} ->
-		    ok = try_again_restart(self(), ChName),
+                    try_again_restart(TryAgainId),
 		    {ok,NState2};
 		Other ->
 		    Other
@@ -806,124 +720,111 @@ restart(Child, State) ->
 	{terminate, NState} ->
 	    report_error(shutdown, reached_max_restart_intensity,
 			 Child, State#state.name),
-	    {shutdown, remove_child(Child, NState)}
+	    {shutdown, del_child(Child, NState)}
     end.
 
 restart(simple_one_for_one, Child, State0) ->
     #child{pid = OldPid, mfargs = {M, F, A}} = Child,
-    State = case OldPid of
+    State1 = case OldPid of
 		?restarting(_) ->
 		    NRes = State0#state.dynamic_restarts - 1,
 		    State0#state{dynamic_restarts = NRes};
 		_ ->
 		    State0
 	    end,
-    Dynamics = ?DICTS:erase(OldPid, dynamics_db(Child#child.restart_type,
-					       State#state.dynamics)),
+    State2 = dyn_erase(OldPid, State1),
     case do_start_child_i(M, F, A) of
 	{ok, Pid} ->
-            DynamicsDb = {dict, ?DICTS:store(Pid, A, Dynamics)},
-	    NState = State#state{dynamics = DynamicsDb},
+            NState = dyn_store(Pid, A, State2),
 	    {ok, NState};
 	{ok, Pid, _Extra} ->
-            DynamicsDb = {dict, ?DICTS:store(Pid, A, Dynamics)},
-	    NState = State#state{dynamics = DynamicsDb},
+            NState = dyn_store(Pid, A, State2),
 	    {ok, NState};
 	{error, Error} ->
-	    NRestarts = State#state.dynamic_restarts + 1,
-            DynamicsDb = {dict, ?DICTS:store(restarting(OldPid), A, Dynamics)},
-	    NState = State#state{dynamic_restarts = NRestarts,
-				 dynamics = DynamicsDb},
-	    report_error(start_error, Error, Child, State#state.name),
-	    {try_again, NState}
+            ROldPid = restarting(OldPid),
+	    NRestarts = State2#state.dynamic_restarts + 1,
+	    State3 = State2#state{dynamic_restarts = NRestarts},
+            NState = dyn_store(ROldPid, A, State3),
+	    report_error(start_error, Error, Child, NState#state.name),
+	    {{try_again, ROldPid}, NState}
     end;
-restart(one_for_one, Child, State) ->
+restart(one_for_one, #child{id=Id} = Child, State) ->
     OldPid = Child#child.pid,
     case do_start_child(State#state.name, Child) of
 	{ok, Pid} ->
-	    NState = replace_child(Child#child{pid = Pid}, State),
+	    NState = set_pid(Pid, Id, State),
 	    {ok, NState};
 	{ok, Pid, _Extra} ->
-	    NState = replace_child(Child#child{pid = Pid}, State),
+	    NState = set_pid(Pid, Id, State),
 	    {ok, NState};
 	{error, Reason} ->
-	    NState = replace_child(Child#child{pid = restarting(OldPid)}, State),
+	    NState = set_pid(restarting(OldPid), Id, State),
 	    report_error(start_error, Reason, Child, State#state.name),
-	    {try_again, NState}
-    end;
-restart(rest_for_one, Child, State) ->
-    {ChAfter, ChBefore} = split_child(Child#child.pid, State#state.children),
-    ChAfter2 = terminate_children(ChAfter, State#state.name),
-    case start_children(ChAfter2, State#state.name) of
-	{ok, ChAfter3} ->
-	    {ok, State#state{children = ChAfter3 ++ ChBefore}};
-	{error, ChAfter3, {failed_to_start_child, ChName, _Reason}}
-	  when ChName =:= Child#child.name ->
-	    NChild = Child#child{pid=restarting(Child#child.pid)},
-	    NState = State#state{children = ChAfter3 ++ ChBefore},
-	    {try_again, replace_child(NChild,NState)};
-	{error, ChAfter3, {failed_to_start_child, ChName, _Reason}} ->
-	    NChild = lists:keyfind(ChName, #child.name, ChAfter3),
-	    NChild2 = NChild#child{pid=?restarting(undefined)},
-	    NState = State#state{children = ChAfter3 ++ ChBefore},
-	    {try_again, replace_child(NChild2,NState), NChild2}
+	    {{try_again,Id}, NState}
     end;
-restart(one_for_all, Child, State) ->
-    Children1 = del_child(Child#child.pid, State#state.children),
-    Children2 = terminate_children(Children1, State#state.name),
-    case start_children(Children2, State#state.name) of
-	{ok, NChs} ->
-	    {ok, State#state{children = NChs}};
-	{error, NChs, {failed_to_start_child, ChName, _Reason}}
-	  when ChName =:= Child#child.name ->
-	    NChild = Child#child{pid=restarting(Child#child.pid)},
-	    NState = State#state{children = NChs},
-	    {try_again, replace_child(NChild,NState)};
-	{error, NChs, {failed_to_start_child, ChName, _Reason}} ->
-	    NChild = lists:keyfind(ChName, #child.name, NChs),
-	    NChild2 = NChild#child{pid=?restarting(undefined)},
-	    NState = State#state{children = NChs},
-	    {try_again, replace_child(NChild2,NState), NChild2}
+restart(rest_for_one, #child{id=Id} = Child, #state{name=SupName} = State) ->
+    {ChAfter, ChBefore} = split_child(Id, State#state.children),
+    {Return, ChAfter2} = restart_multiple_children(Child, ChAfter, SupName),
+    {Return, State#state{children = append(ChAfter2,ChBefore)}};
+restart(one_for_all, Child, #state{name=SupName} = State) ->
+    Children1 = del_child(Child#child.id, State#state.children),
+    {Return, NChildren} = restart_multiple_children(Child, Children1, SupName),
+    {Return, State#state{children = NChildren}}.
+
+restart_multiple_children(Child, Children, SupName) ->
+    Children1 = terminate_children(Children, SupName),
+    case start_children(Children1, SupName) of
+	{ok, NChildren} ->
+	    {ok, NChildren};
+	{error, NChildren, {failed_to_start_child, FailedId, _Reason}} ->
+            NewPid = if FailedId =:= Child#child.id ->
+                             restarting(Child#child.pid);
+                        true ->
+                             ?restarting(undefined)
+                     end,
+	    {{try_again, FailedId}, set_pid(NewPid,FailedId,NChildren)}
     end.
 
 restarting(Pid) when is_pid(Pid) -> ?restarting(Pid);
 restarting(RPid) -> RPid.
 
+-spec try_again_restart(child_id() | {'restarting',pid()}) -> 'ok'.
+try_again_restart(TryAgainId) ->
+    gen_server:cast(self(), {try_again_restart, TryAgainId}).
+
 %%-----------------------------------------------------------------
 %% Func: terminate_children/2
-%% Args: Children = [child_rec()] in termination order
+%% Args: Children = children() % Ids in termination order
 %%       SupName = {local, atom()} | {global, atom()} | {pid(),Mod}
-%% Returns: NChildren = [child_rec()] in
-%%          startup order (reversed termination order)
+%% Returns: NChildren = children() % Ids in startup order
+%%                                 % (reversed termination order)
 %%-----------------------------------------------------------------
 terminate_children(Children, SupName) ->
-    terminate_children(Children, SupName, []).
-
-%% Temporary children should not be restarted and thus should
-%% be skipped when building the list of terminated children, although
-%% we do want them to be shut down as many functions from this module
-%% use this function to just clear everything.
-terminate_children([Child = #child{restart_type=temporary} | Children], SupName, Res) ->
-    _ = do_terminate(Child, SupName),
-    terminate_children(Children, SupName, Res);
-terminate_children([Child | Children], SupName, Res) ->
-    NChild = do_terminate(Child, SupName),
-    terminate_children(Children, SupName, [NChild | Res]);
-terminate_children([], _SupName, Res) ->
-    Res.
+    Terminate =
+        fun(_Id,Child) when ?is_temporary(Child) ->
+                %% Temporary children should not be restarted and thus should
+                %% be skipped when building the list of terminated children.
+                do_terminate(Child, SupName),
+                remove;
+           (_Id,Child) ->
+                do_terminate(Child, SupName),
+                {update,Child#child{pid=undefined}}
+        end,
+    {ok,NChildren} = children_map(Terminate, Children),
+    NChildren.
 
 do_terminate(Child, SupName) when is_pid(Child#child.pid) ->
     case shutdown(Child#child.pid, Child#child.shutdown) of
         ok ->
             ok;
-        {error, normal} when Child#child.restart_type =/= permanent ->
+        {error, normal} when not (?is_permanent(Child)) ->
             ok;
         {error, OtherReason} ->
             report_error(shutdown_error, OtherReason, Child, SupName)
     end,
-    Child#child{pid = undefined};
-do_terminate(Child, _SupName) ->
-    Child#child{pid = undefined}.
+    ok;
+do_terminate(_Child, _SupName) ->
+    ok.
 
 %%-----------------------------------------------------------------
 %% Shutdowns a child. We must check the EXIT value 
@@ -996,66 +897,50 @@ monitor_child(Pid) ->
 	    ok   
     end.
 
-
 %%-----------------------------------------------------------------
-%% Func: terminate_dynamic_children/3
-%% Args: Child    = child_rec()
-%%       Dynamics = ?DICT() | ?SET()
-%%       SupName  = {local, atom()} | {global, atom()} | {pid(),Mod}
+%% Func: terminate_dynamic_children/1
+%% Args: State
 %% Returns: ok
 %%
-%%
 %% Shutdown all dynamic children. This happens when the supervisor is
 %% stopped. Because the supervisor can have millions of dynamic children, we
-%% can have an significative overhead here.
+%% can have a significative overhead here.
 %%-----------------------------------------------------------------
-terminate_dynamic_children(Child, Dynamics, SupName) ->
-    {Pids, EStack0} = monitor_dynamic_children(Child, Dynamics),
-    Sz = ?SETS:size(Pids),
+terminate_dynamic_children(State) ->
+    Child = get_dynamic_child(State),
+    {Pids, EStack0} = monitor_dynamic_children(Child,State),
+    Sz = sets:size(Pids),
     EStack = case Child#child.shutdown of
                  brutal_kill ->
-                     ?SETS:fold(fun(P, _) -> exit(P, kill) end, ok, Pids),
+                     sets:fold(fun(P, _) -> exit(P, kill) end, ok, Pids),
                      wait_dynamic_children(Child, Pids, Sz, undefined, EStack0);
                  infinity ->
-                     ?SETS:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids),
+                     sets:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids),
                      wait_dynamic_children(Child, Pids, Sz, undefined, EStack0);
                  Time ->
-                     ?SETS:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids),
+                     sets:fold(fun(P, _) -> exit(P, shutdown) end, ok, Pids),
                      TRef = erlang:start_timer(Time, self(), kill),
                      wait_dynamic_children(Child, Pids, Sz, TRef, EStack0)
              end,
     %% Unroll stacked errors and report them
-    ?DICTS:fold(fun(Reason, Ls, _) ->
-                       report_error(shutdown_error, Reason,
-                                    Child#child{pid=Ls}, SupName)
-               end, ok, EStack).
-
-
-monitor_dynamic_children(#child{restart_type=temporary}, Dynamics) ->
-    ?SETS:fold(fun(P, {Pids, EStack}) ->
-                       case monitor_child(P) of
-                           ok ->
-                               {?SETS:add_element(P, Pids), EStack};
-                           {error, normal} ->
-                               {Pids, EStack};
-                           {error, Reason} ->
-                               {Pids, ?DICTS:append(Reason, P, EStack)}
-                       end
-               end, {?SETS:new(), ?DICTS:new()}, Dynamics);
-monitor_dynamic_children(#child{restart_type=RType}, Dynamics) ->
-    ?DICTS:fold(fun(P, _, {Pids, EStack}) when is_pid(P) ->
-                       case monitor_child(P) of
-                           ok ->
-                               {?SETS:add_element(P, Pids), EStack};
-                           {error, normal} when RType =/= permanent ->
-                               {Pids, EStack};
-                           {error, Reason} ->
-                               {Pids, ?DICTS:append(Reason, P, EStack)}
-                       end;
-		  (?restarting(_), _, {Pids, EStack}) ->
-		       {Pids, EStack}
-               end, {?SETS:new(), ?DICTS:new()}, Dynamics).
-
+    dict:fold(fun(Reason, Ls, _) ->
+                      report_error(shutdown_error, Reason,
+                                   Child#child{pid=Ls}, State#state.name)
+              end, ok, EStack).
+
+monitor_dynamic_children(Child,State) ->
+    dyn_fold(fun(P,{Pids, EStack}) when is_pid(P) ->
+                     case monitor_child(P) of
+                         ok ->
+                             {sets:add_element(P, Pids), EStack};
+                         {error, normal} when not (?is_permanent(Child)) ->
+                             {Pids, EStack};
+                         {error, Reason} ->
+                             {Pids, dict:append(Reason, P, EStack)}
+                     end;
+                (?restarting(_), {Pids, EStack}) ->
+                     {Pids, EStack}
+             end, {sets:new(), dict:new()}, State).
 
 wait_dynamic_children(_Child, _Pids, 0, undefined, EStack) ->
     EStack;
@@ -1073,39 +958,38 @@ wait_dynamic_children(#child{shutdown=brutal_kill} = Child, Pids, Sz,
                       TRef, EStack) ->
     receive
         {'DOWN', _MRef, process, Pid, killed} ->
-            wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1,
+            wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1,
                                   TRef, EStack);
 
         {'DOWN', _MRef, process, Pid, Reason} ->
-            wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1,
-                                  TRef, ?DICTS:append(Reason, Pid, EStack))
+            wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1,
+                                  TRef, dict:append(Reason, Pid, EStack))
     end;
-wait_dynamic_children(#child{restart_type=RType} = Child, Pids, Sz,
-                      TRef, EStack) ->
+wait_dynamic_children(Child, Pids, Sz, TRef, EStack) ->
     receive
         {'DOWN', _MRef, process, Pid, shutdown} ->
-            wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1,
+            wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1,
                                   TRef, EStack);
 
         {'DOWN', _MRef, process, Pid, {shutdown, _}} ->
-            wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1,
+            wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1,
                                   TRef, EStack);
 
-        {'DOWN', _MRef, process, Pid, normal} when RType =/= permanent ->
-            wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1,
+        {'DOWN', _MRef, process, Pid, normal} when not (?is_permanent(Child)) ->
+            wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1,
                                   TRef, EStack);
 
         {'DOWN', _MRef, process, Pid, Reason} ->
-            wait_dynamic_children(Child, ?SETS:del_element(Pid, Pids), Sz-1,
-                                  TRef, ?DICTS:append(Reason, Pid, EStack));
+            wait_dynamic_children(Child, sets:del_element(Pid, Pids), Sz-1,
+                                  TRef, dict:append(Reason, Pid, EStack));
 
         {timeout, TRef, kill} ->
-            ?SETS:fold(fun(P, _) -> exit(P, kill) end, ok, Pids),
+            sets:fold(fun(P, _) -> exit(P, kill) end, ok, Pids),
             wait_dynamic_children(Child, Pids, Sz, undefined, EStack)
     end.
 
 %%-----------------------------------------------------------------
-%% Child/State manipulating functions.
+%% Access #state.children
 %%-----------------------------------------------------------------
 
 %% Note we do not want to save the parameter list for temporary processes as
@@ -1113,114 +997,184 @@ wait_dynamic_children(#child{restart_type=RType} = Child, Pids, Sz,
 %% Especially for dynamic children to simple_one_for_one supervisors
 %% it could become very costly as it is not uncommon to spawn
 %% very many such processes.
-save_child(#child{restart_type = temporary,
-		  mfargs = {M, F, _}} = Child, #state{children = Children} = State) ->
-    State#state{children = [Child#child{mfargs = {M, F, undefined}} |Children]};
-save_child(Child, #state{children = Children} = State) ->
-    State#state{children = [Child |Children]}.
-
-save_dynamic_child(temporary, Pid, _, #state{dynamics = Dynamics} = State) ->
-    DynamicsDb = dynamics_db(temporary, Dynamics),
-    State#state{dynamics = {set, ?SETS:add_element(Pid, DynamicsDb)}};
-save_dynamic_child(RestartType, Pid, Args, #state{dynamics = Dynamics} = State) ->
-    DynamicsDb = dynamics_db(RestartType, Dynamics),
-    State#state{dynamics = {dict, ?DICTS:store(Pid, Args, DynamicsDb)}}.
-
-dynamics_db(temporary, undefined) ->
-    ?SETS:new();
-dynamics_db(_, undefined) ->
-    ?DICTS:new();
-dynamics_db(_, {_Tag, DynamicsDb}) ->
-    DynamicsDb.
-
-dynamic_child_args(_Pid, temporary, _DynamicsDb) ->
-    {ok, undefined};
-dynamic_child_args(Pid, _RT, {dict, DynamicsDb}) ->
-    ?DICTS:find(Pid, DynamicsDb);
-dynamic_child_args(_Pid, _RT, undefined) ->
-    error.
-
-state_del_child(#child{pid = Pid, restart_type = temporary}, State) when ?is_simple(State) ->
-    NDynamics = ?SETS:del_element(Pid, dynamics_db(temporary, State#state.dynamics)),
-    State#state{dynamics = {set, NDynamics}};
-state_del_child(#child{pid = Pid, restart_type = RType}, State) when ?is_simple(State) ->
-    NDynamics = ?DICTS:erase(Pid, dynamics_db(RType, State#state.dynamics)),
-    State#state{dynamics = {dict, NDynamics}};
-state_del_child(Child, State) ->
-    NChildren = del_child(Child#child.name, State#state.children),
-    State#state{children = NChildren}.
-
-del_child(Name, [Ch|Chs]) when Ch#child.name =:= Name, Ch#child.restart_type =:= temporary ->
-    Chs;
-del_child(Name, [Ch|Chs]) when Ch#child.name =:= Name ->
-    [Ch#child{pid = undefined} | Chs];
-del_child(Pid, [Ch|Chs]) when Ch#child.pid =:= Pid, Ch#child.restart_type =:= temporary ->
-    Chs;
-del_child(Pid, [Ch|Chs]) when Ch#child.pid =:= Pid ->
-    [Ch#child{pid = undefined} | Chs];
-del_child(Name, [Ch|Chs]) ->
-    [Ch|del_child(Name, Chs)];
-del_child(_, []) ->
-    [].
+-spec save_child(child_rec(), state()) -> state().
+save_child(#child{mfargs = {M, F, _}} = Child, State) when ?is_temporary(Child) ->
+    do_save_child(Child#child{mfargs = {M, F, undefined}}, State);
+save_child(Child, State) ->
+    do_save_child(Child, State).
+
+-spec do_save_child(child_rec(), state()) -> state().
+do_save_child(#child{id = Id} = Child, #state{children = {Ids,Db}} = State) ->
+    State#state{children = {[Id|Ids],Db#{Id => Child}}}.
+
+-spec del_child(child_rec(), state()) -> state();
+               (child_id(), children()) -> children().
+del_child(#child{pid = Pid}, State) when ?is_simple(State) ->
+    dyn_erase(Pid,State);
+del_child(Child, State) when is_record(Child,child), is_record(State,state) ->
+    NChildren = del_child(Child#child.id, State#state.children),
+    State#state{children = NChildren};
+del_child(Id, {Ids,Db}) ->
+    case maps:get(Id, Db) of
+        Child when Child#child.restart_type =:= temporary ->
+            {lists:delete(Id, Ids), maps:remove(Id, Db)};
+        Child ->
+            {Ids, Db#{Id=>Child#child{pid=undefined}}}
+    end.
 
-%% Chs = [S4, S3, Ch, S1, S0]
-%% Ret: {[S4, S3, Ch], [S1, S0]}
-split_child(Name, Chs) ->
-    split_child(Name, Chs, []).
-
-split_child(Name, [Ch|Chs], After) when Ch#child.name =:= Name ->
-    {lists:reverse([Ch#child{pid = undefined} | After]), Chs};
-split_child(Pid, [Ch|Chs], After) when Ch#child.pid =:= Pid ->
-    {lists:reverse([Ch#child{pid = undefined} | After]), Chs};
-split_child(Name, [Ch|Chs], After) ->
-    split_child(Name, Chs, [Ch | After]);
-split_child(_, [], After) ->
-    {lists:reverse(After), []}.
-
-get_child(Name, State) ->
-    get_child(Name, State, false).
-
-get_child(Pid, State, AllowPid) when AllowPid, is_pid(Pid) ->
-    get_dynamic_child(Pid, State);
-get_child(Name, State, _) ->
-    lists:keysearch(Name, #child.name, State#state.children).
-
-get_dynamic_child(Pid, #state{children=[Child], dynamics=Dynamics}) ->
-    case is_dynamic_pid(Pid, Dynamics) of
-	true ->
-	    {value, Child#child{pid=Pid}};
-	false ->
-	    RPid = restarting(Pid),
-	    case is_dynamic_pid(RPid, Dynamics) of
-		true ->
-		    {value, Child#child{pid=RPid}};
-		false ->
+%% In: {[S4, S3, Ch, S1, S0],Db}
+%% Ret: {{[S4, S3, Ch],Db1}, {[S1, S0],Db2}}
+%% Db1 and Db2 contain the keys in the lists they are associated with.
+-spec split_child(child_id(), children()) -> {children(), children()}.
+split_child(Id, {Ids,Db}) ->
+    {IdsAfter,IdsBefore} = split_ids(Id, Ids, []),
+    DbBefore = maps:with(IdsBefore,Db),
+    #{Id:=Ch} = DbAfter = maps:with(IdsAfter,Db),
+    {{IdsAfter,DbAfter#{Id=>Ch#child{pid=undefined}}},{IdsBefore,DbBefore}}.
+
+split_ids(Id, [Id|Ids], After) ->
+    {lists:reverse([Id|After]), Ids};
+split_ids(Id, [Other|Ids], After) ->
+    split_ids(Id, Ids, [Other | After]).
+
+%% Find the child record for a given Pid (dynamic child) or Id
+%% (non-dynamic child). This is called from the API functions.
+-spec find_child(pid() | child_id(), state()) -> {ok,child_rec()} | error.
+find_child(Pid, State) when is_pid(Pid), ?is_simple(State) ->
+    case find_dynamic_child(Pid, State) of
+        error ->
+            case find_dynamic_child(restarting(Pid), State) of
+                error ->
 		    case erlang:is_process_alive(Pid) of
-			true -> false;
-			false -> {value, Child}
-		    end
-	    end
+			true -> error;
+			false -> {ok, get_dynamic_child(State)}
+		    end;
+                Other ->
+                    Other
+            end;
+        Other ->
+            Other
+    end;
+find_child(Id, #state{children = {_Ids,Db}}) ->
+    maps:find(Id, Db).
+
+%% Get the child record - either by child id or by pid.  If
+%% simple_one_for_one, then insert the pid and args into the returned
+%% child record. This is called when trying to restart the child.
+-spec find_child_and_args(IdOrPid, state()) -> {ok, child_rec()} | error when
+      IdOrPid :: pid() | {restarting,pid()} | child_id().
+find_child_and_args(Pid, State) when ?is_simple(State) ->
+    case find_dynamic_child(Pid, State) of
+        {ok,#child{mfargs={M,F,_}} = Child} ->
+            {ok, Args} = dyn_args(Pid, State),
+            {ok, Child#child{mfargs = {M, F, Args}}};
+        error ->
+            error
+    end;
+find_child_and_args(Pid, State) when is_pid(Pid) ->
+    find_child_by_pid(Pid, State);
+find_child_and_args(Id, #state{children={_Ids,Db}})  ->
+    maps:find(Id, Db).
+
+%% Given the pid, find the child record for a dynamic child, and
+%% include the pid in the returned record.
+-spec find_dynamic_child(IdOrPid, state()) -> {ok, child_rec()} | error when
+      IdOrPid :: pid() | {restarting,pid()} | child_id().
+find_dynamic_child(Pid, State) ->
+    case dyn_exists(Pid, State) of
+        true ->
+            Child = get_dynamic_child(State),
+            {ok, Child#child{pid=Pid}};
+        false ->
+            error
     end.
 
-is_dynamic_pid(Pid, {dict, Dynamics}) ->
-    ?DICTS:is_key(Pid, Dynamics);
-is_dynamic_pid(Pid, {set, Dynamics}) ->
-    ?SETS:is_element(Pid, Dynamics);
-is_dynamic_pid(_Pid, undefined) ->
-    false.
-
-replace_child(Child, State) ->
-    Chs = do_replace_child(Child, State#state.children),
-    State#state{children = Chs}.
-
-do_replace_child(Child, [Ch|Chs]) when Ch#child.name =:= Child#child.name ->
-    [Child | Chs];
-do_replace_child(Child, [Ch|Chs]) ->
-    [Ch|do_replace_child(Child, Chs)].
+%% Given the pid, find the child record for a non-dyanamic child.
+-spec find_child_by_pid(IdOrPid, state()) -> {ok,child_rec()} | error when
+      IdOrPid :: pid() | {restarting,pid()}.
+find_child_by_pid(Pid,#state{children={_Ids,Db}}) ->
+    Fun = fun(_Id,#child{pid=P}=Ch,_) when P =:= Pid ->
+                  throw(Ch);
+             (_,_,error) ->
+                  error
+          end,
+    try maps:fold(Fun,error,Db)
+    catch throw:Child -> {ok,Child}
+    end.
 
-remove_child(Child, State) ->
-    Chs = lists:keydelete(Child#child.name, #child.name, State#state.children),
-    State#state{children = Chs}.
+%% Get the child record from a simple_one_for_one supervisor - no pid
+%% It is assumed that the child can always be found
+-spec get_dynamic_child(state()) -> child_rec().
+get_dynamic_child(#state{children={[Id],Db}}) ->
+    #{Id := Child} = Db,
+    Child.
+
+%% Update pid in the given child record and store it in the process state
+-spec set_pid(term(), child_id(), state()) -> state();
+             (term(), child_id(), children()) -> children().
+set_pid(Pid, Id, #state{children=Children} = State) ->
+    State#state{children = set_pid(Pid, Id, Children)};
+set_pid(Pid, Id, {Ids, Db}) ->
+    NewDb = maps:update_with(Id, fun(Child) -> Child#child{pid=Pid} end, Db),
+    {Ids,NewDb}.
+
+%% Remove the Id and the child record from the process state
+-spec remove_child(child_id(), state()) -> state().
+remove_child(Id, #state{children={Ids,Db}} = State) ->
+    NewIds = lists:delete(Id,Ids),
+    NewDb = maps:remove(Id,Db),
+    State#state{children = {NewIds,NewDb}}.
+
+%% In the order of Ids, traverse the children and update each child
+%% according to the return value of the Fun.
+%% On error, abort and return the merge of the old and the updated map.
+%% NOTE: The returned list of Ids is reverted compared to the input.
+-spec children_map(Fun, children()) -> {ok, children()} |
+                                       {error,children(),Reason} when
+      Fun :: fun((child_id(),child_rec()) -> {update,child_rec()} |
+                                             remove |
+                                             {abort, Reason}),
+      Reason :: term().
+children_map(Fun,{Ids,Db}) ->
+    children_map(Fun, Ids, Db, []).
+
+children_map(Fun,[Id|Ids],Db,Acc) ->
+    case Fun(Id,maps:get(Id,Db)) of
+        {update,Child} ->
+            children_map(Fun,Ids,Db#{Id => Child},[Id|Acc]);
+        remove ->
+            children_map(Fun,Ids,maps:remove(Id,Db),Acc);
+        {abort,Reason} ->
+            {error,{lists:reverse(Ids)++[Id|Acc],Db},Reason}
+    end;
+children_map(_Fun,[],Db,Acc) ->
+    {ok,{Acc,Db}}.
+
+%% In the order of Ids, map over all children and return the list
+-spec children_to_list(Fun, children()) -> List when
+      Fun :: fun((child_id(), child_rec()) -> Elem),
+      List :: list(Elem),
+      Elem :: term().
+children_to_list(Fun,{Ids,Db}) ->
+    children_to_list(Fun, Ids, Db, []).
+children_to_list(Fun,[Id|Ids],Db,Acc) ->
+    children_to_list(Fun,Ids,Db,[Fun(Id,maps:get(Id,Db))|Acc]);
+children_to_list(_Fun,[],_Db,Acc) ->
+    lists:reverse(Acc).
+
+%% The order is not important - so ignore Ids
+-spec children_fold(Fun, Acc0, children()) -> Acc1 when
+      Fun :: fun((child_id(), child_rec(), AccIn) -> AccOut),
+      Acc0 :: term(),
+      Acc1 :: term(),
+      AccIn :: term(),
+      AccOut :: term().
+children_fold(Fun,Init,{_Ids,Db}) ->
+    maps:fold(Fun, Init, Db).
+
+-spec append(children(), children()) -> children().
+append({Ids1,Db1},{Ids2,Db2}) ->
+    {Ids1++Ids2,maps:merge(Db1,Db2)}.
 
 %%-----------------------------------------------------------------
 %% Func: init_state/4
@@ -1290,27 +1244,27 @@ supname(N, _)      -> N.
 %%% Returns: {ok, [child_rec()]} | Error
 %%% ------------------------------------------------------
 
-check_startspec(Children) -> check_startspec(Children, []).
+check_startspec(Children) -> check_startspec(Children, [], #{}).
 
-check_startspec([ChildSpec|T], Res) ->
+check_startspec([ChildSpec|T], Ids, Db) ->
     case check_childspec(ChildSpec) of
-	{ok, Child} ->
-	    case lists:keymember(Child#child.name, #child.name, Res) of
+	{ok, #child{id=Id}=Child} ->
+	    case maps:is_key(Id, Db) of
 		%% The error message duplicate_child_name is kept for
 		%% backwards compatibility, although
 		%% duplicate_child_id would be more correct.
-		true -> {duplicate_child_name, Child#child.name};
-		false -> check_startspec(T, [Child | Res])
+		true -> {duplicate_child_name, Id};
+		false -> check_startspec(T, [Id | Ids], Db#{Id=>Child})
 	    end;
 	Error -> Error
     end;
-check_startspec([], Res) ->
-    {ok, lists:reverse(Res)}.
+check_startspec([], Ids, Db) ->
+    {ok, {lists:reverse(Ids),Db}}.
 
 check_childspec(ChildSpec) when is_map(ChildSpec) ->
     catch do_check_childspec(maps:merge(?default_child_spec,ChildSpec));
-check_childspec({Name, Func, RestartType, Shutdown, ChildType, Mods}) ->
-    check_childspec(#{id => Name,
+check_childspec({Id, Func, RestartType, Shutdown, ChildType, Mods}) ->
+    check_childspec(#{id => Id,
 		      start => Func,
 		      restart => RestartType,
 		      shutdown => Shutdown,
@@ -1320,15 +1274,15 @@ check_childspec(X) -> {invalid_child_spec, X}.
 
 do_check_childspec(#{restart := RestartType,
 		     type := ChildType} = ChildSpec)->
-    Name = case ChildSpec of
-	       #{id := N} -> N;
+    Id = case ChildSpec of
+	       #{id := I} -> I;
 	       _ -> throw(missing_id)
 	   end,
     Func = case ChildSpec of
 	       #{start := F} -> F;
 	       _ -> throw(missing_start)
 	   end,
-    validName(Name),
+    validId(Id),
     validFunc(Func),
     validRestartType(RestartType),
     validChildType(ChildType),
@@ -1343,14 +1297,14 @@ do_check_childspec(#{restart := RestartType,
 	       _ -> {M,_,_} = Func, [M]
 	   end,
     validMods(Mods),
-    {ok, #child{name = Name, mfargs = Func, restart_type = RestartType,
+    {ok, #child{id = Id, mfargs = Func, restart_type = RestartType,
 		shutdown = Shutdown, child_type = ChildType, modules = Mods}}.
 
 validChildType(supervisor) -> true;
 validChildType(worker) -> true;
 validChildType(What) -> throw({invalid_child_type, What}).
 
-validName(_Name) -> true.
+validId(_Id) -> true.
 
 validFunc({M, F, A}) when is_atom(M), 
                           is_atom(F), 
@@ -1379,13 +1333,13 @@ validMods(Mods) when is_list(Mods) ->
 		  Mods);
 validMods(Mods) -> throw({invalid_modules, Mods}).
 
-child_to_spec(#child{name = Name,
+child_to_spec(#child{id = Id,
 		    mfargs = Func,
 		    restart_type = RestartType,
 		    shutdown = Shutdown,
 		    child_type = ChildType,
 		    modules = Mods}) ->
-    #{id => Name,
+    #{id => Id,
       start => Func,
       restart => RestartType,
       shutdown => Shutdown,
@@ -1439,17 +1393,16 @@ report_error(Error, Reason, Child, SupName) ->
 		{offender, extract_child(Child)}],
     error_logger:error_report(supervisor_report, ErrorMsg).
 
-
 extract_child(Child) when is_list(Child#child.pid) ->
     [{nb_children, length(Child#child.pid)},
-     {id, Child#child.name},
+     {id, Child#child.id},
      {mfargs, Child#child.mfargs},
      {restart_type, Child#child.restart_type},
      {shutdown, Child#child.shutdown},
      {child_type, Child#child.child_type}];
 extract_child(Child) ->
     [{pid, Child#child.pid},
-     {id, Child#child.name},
+     {id, Child#child.id},
      {mfargs, Child#child.mfargs},
      {restart_type, Child#child.restart_type},
      {shutdown, Child#child.shutdown},
@@ -1465,3 +1418,46 @@ format_status(terminate, [_PDict, State]) ->
 format_status(_, [_PDict, State]) ->
     [{data, [{"State", State}]},
      {supervisor, [{"Callback", State#state.module}]}].
+
+%%%-----------------------------------------------------------------
+%%% Dynamics database access
+dyn_size(#state{dynamics = {Mod,Db}}) ->
+    Mod:size(Db).
+
+dyn_erase(Pid,#state{dynamics={sets,Db}}=State) ->
+    State#state{dynamics={sets,sets:del_element(Pid,Db)}};
+dyn_erase(Pid,#state{dynamics={maps,Db}}=State) ->
+    State#state{dynamics={maps,maps:remove(Pid,Db)}}.
+
+dyn_store(Pid,_,#state{dynamics={sets,Db}}=State) ->
+    State#state{dynamics={sets,sets:add_element(Pid,Db)}};
+dyn_store(Pid,Args,#state{dynamics={maps,Db}}=State) ->
+    State#state{dynamics={maps,Db#{Pid => Args}}}.
+
+dyn_fold(Fun,Init,#state{dynamics={sets,Db}}) ->
+    sets:fold(Fun,Init,Db);
+dyn_fold(Fun,Init,#state{dynamics={maps,Db}}) ->
+    maps:fold(fun(Pid,_,Acc) -> Fun(Pid,Acc) end, Init, Db).
+
+dyn_map(Fun, #state{dynamics={sets,Db}}) ->
+    lists:map(Fun, sets:to_list(Db));
+dyn_map(Fun, #state{dynamics={maps,Db}}) ->
+    lists:map(Fun, maps:keys(Db)).
+
+dyn_exists(Pid, #state{dynamics={sets, Db}}) ->
+    sets:is_element(Pid, Db);
+dyn_exists(Pid, #state{dynamics={maps, Db}}) ->
+    maps:is_key(Pid, Db).
+
+dyn_args(_Pid, #state{dynamics={sets, _Db}}) ->
+    {ok,undefined};
+dyn_args(Pid, #state{dynamics={maps, Db}}) ->
+    maps:find(Pid, Db).
+
+dyn_init(State) ->
+    dyn_init(get_dynamic_child(State),State).
+
+dyn_init(Child,State) when ?is_temporary(Child) ->
+    State#state{dynamics={sets,sets:new()}};
+dyn_init(_Child,State) ->
+    State#state{dynamics={maps,maps:new()}}.
diff --git a/lib/stdlib/src/sys.erl b/lib/stdlib/src/sys.erl
index 1f966411c5..0c578acf21 100644
--- a/lib/stdlib/src/sys.erl
+++ b/lib/stdlib/src/sys.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -38,7 +38,9 @@
 
 -export_type([dbg_opt/0]).
 
--type name()         :: pid() | atom() | {'global', atom()}.
+-type name()         :: pid() | atom()
+                      | {'global', term()}
+                      | {'via', module(), term()}.
 -type system_event() :: {'in', Msg :: _}
                       | {'in', Msg :: _, From :: _}
                       | {'out', Msg :: _, To :: _}
diff --git a/lib/stdlib/src/uri_string.erl b/lib/stdlib/src/uri_string.erl
new file mode 100644
index 0000000000..28d36ea229
--- /dev/null
+++ b/lib/stdlib/src/uri_string.erl
@@ -0,0 +1,2096 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+%% [RFC 3986, Chapter 2.2. Reserved Characters]
+%%
+%%   reserved    = gen-delims / sub-delims
+%%
+%%   gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
+%%
+%%   sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
+%%               / "*" / "+" / "," / ";" / "="
+%%
+%%
+%% [RFC 3986, Chapter 2.3. Unreserved Characters]
+%%
+%%   unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"
+%%
+%%
+%% [RFC 3986, Chapter 3. Syntax Components]
+%%
+%% The generic URI syntax consists of a hierarchical sequence of
+%% components referred to as the scheme, authority, path, query, and
+%% fragment.
+%%
+%%    URI         = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
+%%
+%%    hier-part   = "//" authority path-abempty
+%%                   / path-absolute
+%%                   / path-rootless
+%%                   / path-empty
+%%
+%%    The scheme and path components are required, though the path may be
+%%    empty (no characters).  When authority is present, the path must
+%%    either be empty or begin with a slash ("/") character.  When
+%%    authority is not present, the path cannot begin with two slash
+%%    characters ("//").  These restrictions result in five different ABNF
+%%    rules for a path (Section 3.3), only one of which will match any
+%%    given URI reference.
+%%
+%%    The following are two example URIs and their component parts:
+%%
+%%          foo://example.com:8042/over/there?name=ferret#nose
+%%          \_/   \______________/\_________/ \_________/ \__/
+%%           |           |            |            |        |
+%%        scheme     authority       path        query   fragment
+%%           |   _____________________|__
+%%          / \ /                        \
+%%          urn:example:animal:ferret:nose
+%%
+%%
+%% [RFC 3986, Chapter 3.1. Scheme]
+%%
+%% Each URI begins with a scheme name that refers to a specification for
+%% assigning identifiers within that scheme.
+%%
+%%    scheme      = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
+%%
+%%
+%% [RFC 3986, Chapter 3.2. Authority]
+%%
+%% Many URI schemes include a hierarchical element for a naming
+%% authority so that governance of the name space defined by the
+%% remainder of the URI is delegated to that authority (which may, in
+%% turn, delegate it further).
+%%
+%%    authority   = [ userinfo "@" ] host [ ":" port ]
+%%
+%%
+%% [RFC 3986, Chapter 3.2.1. User Information]
+%%
+%% The userinfo subcomponent may consist of a user name and, optionally,
+%% scheme-specific information about how to gain authorization to access
+%% the resource. The user information, if present, is followed by a
+%% commercial at-sign ("@") that delimits it from the host.
+%%
+%%    userinfo    = *( unreserved / pct-encoded / sub-delims / ":" )
+%%
+%%
+%% [RFC 3986, Chapter 3.2.2. Host]
+%%
+%% The host subcomponent of authority is identified by an IP literal
+%% encapsulated within square brackets, an IPv4 address in dotted-
+%% decimal form, or a registered name.
+%%
+%%    host        = IP-literal / IPv4address / reg-name
+%%
+%%    IP-literal = "[" ( IPv6address / IPvFuture  ) "]"
+%%
+%%    IPvFuture  = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
+%%
+%%    IPv6address =                            6( h16 ":" ) ls32
+%%                /                       "::" 5( h16 ":" ) ls32
+%%                / [               h16 ] "::" 4( h16 ":" ) ls32
+%%                / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
+%%                / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
+%%                / [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
+%%                / [ *4( h16 ":" ) h16 ] "::"              ls32
+%%                / [ *5( h16 ":" ) h16 ] "::"              h16
+%%                / [ *6( h16 ":" ) h16 ] "::"
+%%
+%%    ls32        = ( h16 ":" h16 ) / IPv4address
+%%                ; least-significant 32 bits of address
+%%
+%%    h16         = 1*4HEXDIG
+%%                ; 16 bits of address represented in hexadecimal
+%%
+%%    IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet
+%%
+%%    dec-octet   = DIGIT                 ; 0-9
+%%                / %x31-39 DIGIT         ; 10-99
+%%                / "1" 2DIGIT            ; 100-199
+%%                / "2" %x30-34 DIGIT     ; 200-249
+%%                / "25" %x30-35          ; 250-255
+%%
+%%    reg-name    = *( unreserved / pct-encoded / sub-delims )
+%%
+%%
+%% [RFC 3986, Chapter 3.2.2. Port]
+%%
+%% The port subcomponent of authority is designated by an optional port
+%% number in decimal following the host and delimited from it by a
+%% single colon (":") character.
+%%
+%%    port        = *DIGIT
+%%
+%%
+%% [RFC 3986, Chapter 3.3. Path]
+%%
+%% The path component contains data, usually organized in hierarchical
+%% form, that, along with data in the non-hierarchical query component
+%% (Section 3.4), serves to identify a resource within the scope of the
+%% URI's scheme and naming authority (if any).  The path is terminated
+%% by the first question mark ("?") or number sign ("#") character, or
+%% by the end of the URI.
+%%
+%%    path          = path-abempty    ; begins with "/" or is empty
+%%                  / path-absolute   ; begins with "/" but not "//"
+%%                  / path-noscheme   ; begins with a non-colon segment
+%%                  / path-rootless   ; begins with a segment
+%%                  / path-empty      ; zero characters
+%%
+%%    path-abempty  = *( "/" segment )
+%%    path-absolute = "/" [ segment-nz *( "/" segment ) ]
+%%    path-noscheme = segment-nz-nc *( "/" segment )
+%%    path-rootless = segment-nz *( "/" segment )
+%%    path-empty    = 0<pchar>
+%%    segment       = *pchar
+%%    segment-nz    = 1*pchar
+%%    segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" )
+%%                  ; non-zero-length segment without any colon ":"
+%%
+%%    pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
+%%
+%%
+%% [RFC 3986, Chapter 3.4. Query]
+%%
+%% The query component contains non-hierarchical data that, along with
+%% data in the path component (Section 3.3), serves to identify a
+%% resource within the scope of the URI's scheme and naming authority
+%% (if any).  The query component is indicated by the first question
+%% mark ("?") character and terminated by a number sign ("#") character
+%% or by the end of the URI.
+%%
+%%    query       = *( pchar / "/" / "?" )
+%%
+%%
+%% [RFC 3986, Chapter 3.5. Fragment]
+%%
+%% The fragment identifier component of a URI allows indirect
+%% identification of a secondary resource by reference to a primary
+%% resource and additional identifying information.
+%%
+%%    fragment    = *( pchar / "/" / "?" )
+%%
+%%
+%% [RFC 3986, Chapter 4.1. URI Reference]
+%%
+%% URI-reference is used to denote the most common usage of a resource
+%% identifier.
+%%
+%%    URI-reference = URI / relative-ref
+%%
+%%
+%% [RFC 3986, Chapter 4.2. Relative Reference]
+%%
+%% A relative reference takes advantage of the hierarchical syntax
+%% (Section 1.2.3) to express a URI reference relative to the name space
+%% of another hierarchical URI.
+%%
+%%    relative-ref  = relative-part [ "?" query ] [ "#" fragment ]
+%%
+%%    relative-part = "//" authority path-abempty
+%%                  / path-absolute
+%%                  / path-noscheme
+%%                  / path-empty
+%%
+%%
+%% [RFC 3986, Chapter 4.3. Absolute URI]
+%%
+%% Some protocol elements allow only the absolute form of a URI without
+%% a fragment identifier.  For example, defining a base URI for later
+%% use by relative references calls for an absolute-URI syntax rule that
+%% does not allow a fragment.
+%%
+%%    absolute-URI  = scheme ":" hier-part [ "?" query ]
+%%
+-module(uri_string).
+
+%%-------------------------------------------------------------------------
+%% External API
+%%-------------------------------------------------------------------------
+-export([compose_query/1, compose_query/2,
+         dissect_query/1, normalize/1, normalize/2, parse/1,
+         recompose/1, transcode/2]).
+-export_type([error/0, uri_map/0, uri_string/0]).
+
+
+%%-------------------------------------------------------------------------
+%% Internal API
+%%-------------------------------------------------------------------------
+-export([is_host/1, is_path/1]).  % suppress warnings
+
+
+%%-------------------------------------------------------------------------
+%% Macros
+%%-------------------------------------------------------------------------
+-define(CHAR(Char), <<Char/utf8>>).
+-define(STRING_EMPTY, <<>>).
+-define(STRING(MatchStr), <<MatchStr/binary>>).
+-define(STRING_REST(MatchStr, Rest), <<MatchStr/utf8, Rest/binary>>).
+
+-define(DEC2HEX(X),
+        if ((X) >= 0) andalso ((X) =< 9) -> (X) + $0;
+           ((X) >= 10) andalso ((X) =< 15) -> (X) + $A - 10
+        end).
+
+-define(HEX2DEC(X),
+        if ((X) >= $0) andalso ((X) =< $9) -> (X) - $0;
+           ((X) >= $A) andalso ((X) =< $F) -> (X) - $A + 10;
+           ((X) >= $a) andalso ((X) =< $f) -> (X) - $a + 10
+        end).
+
+
+%%%=========================================================================
+%%%  API
+%%%=========================================================================
+
+%%-------------------------------------------------------------------------
+%% URI compliant with RFC 3986
+%% ASCII %x21 - %x7A ("!" - "z") except
+%%   %x34    "    double quote
+%%   %x60    <    less than
+%%   %x62    >    greater than
+%%   %x92    \    backslash
+%%   %x94    ^    caret / circumflex
+%%   %x96    `    grave / accent
+%%-------------------------------------------------------------------------
+-type uri_string() :: iodata().
+-type error() :: {error, atom(), term()}.
+
+
+%%-------------------------------------------------------------------------
+%% RFC 3986, Chapter 3. Syntax Components
+%%-------------------------------------------------------------------------
+-type uri_map() ::
+  #{fragment => unicode:chardata(),
+    host => unicode:chardata(),
+    path => unicode:chardata(),
+    port => non_neg_integer() | undefined,
+    query => unicode:chardata(),
+    scheme => unicode:chardata(),
+    userinfo => unicode:chardata()} | #{}.
+
+
+%%-------------------------------------------------------------------------
+%% Normalize URIs
+%%-------------------------------------------------------------------------
+-spec normalize(URI) -> NormalizedURI when
+      URI :: uri_string() | uri_map(),
+      NormalizedURI :: uri_string()
+                     | error().
+normalize(URIMap) ->
+    normalize(URIMap, []).
+
+
+-spec normalize(URI, Options) -> NormalizedURI when
+      URI :: uri_string() | uri_map(),
+      Options :: [return_map],
+      NormalizedURI :: uri_string() | uri_map().
+normalize(URIMap, []) when is_map(URIMap) ->
+    recompose(normalize_map(URIMap));
+normalize(URIMap, [return_map]) when is_map(URIMap) ->
+    normalize_map(URIMap);
+normalize(URIString, []) ->
+    case parse(URIString) of
+        Value when is_map(Value) ->
+            recompose(normalize_map(Value));
+        Error ->
+            Error
+    end;
+normalize(URIString, [return_map]) ->
+    case parse(URIString) of
+        Value when is_map(Value) ->
+            normalize_map(Value);
+        Error ->
+            Error
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% Parse URIs
+%%-------------------------------------------------------------------------
+-spec parse(URIString) -> URIMap when
+      URIString :: uri_string(),
+      URIMap :: uri_map()
+              | error().
+parse(URIString) when is_binary(URIString) ->
+    try parse_uri_reference(URIString, #{})
+    catch
+        throw:{error, Atom, RestData} -> {error, Atom, RestData}
+    end;
+parse(URIString) when is_list(URIString) ->
+    try
+        Binary = unicode:characters_to_binary(URIString),
+        Map = parse_uri_reference(Binary, #{}),
+        convert_mapfields_to_list(Map)
+    catch
+        throw:{error, Atom, RestData} -> {error, Atom, RestData}
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% Recompose URIs
+%%-------------------------------------------------------------------------
+-spec recompose(URIMap) -> URIString when
+      URIMap :: uri_map(),
+      URIString :: uri_string()
+                 | error().
+recompose(Map) ->
+    case is_valid_map(Map) of
+        false ->
+            {error, invalid_map, Map};
+        true ->
+            try
+                T0 = update_scheme(Map, empty),
+                T1 = update_userinfo(Map, T0),
+                T2 = update_host(Map, T1),
+                T3 = update_port(Map, T2),
+                T4 = update_path(Map, T3),
+                T5 = update_query(Map, T4),
+                update_fragment(Map, T5)
+            catch
+                throw:{error, Atom, RestData} -> {error, Atom, RestData}
+            end
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% Transcode URIs
+%%-------------------------------------------------------------------------
+-spec transcode(URIString, Options) -> Result when
+      URIString :: uri_string(),
+      Options :: [{in_encoding, unicode:encoding()}|{out_encoding, unicode:encoding()}],
+      Result :: uri_string()
+              | error().
+transcode(URIString, Options) when is_binary(URIString) ->
+    try
+        InEnc = proplists:get_value(in_encoding, Options, utf8),
+        OutEnc = proplists:get_value(out_encoding, Options, utf8),
+        List = convert_to_list(URIString, InEnc),
+        Output = transcode(List, [], InEnc, OutEnc),
+        convert_to_binary(Output, utf8, OutEnc)
+    catch
+        throw:{error, Atom, RestData} -> {error, Atom, RestData}
+    end;
+transcode(URIString, Options) when is_list(URIString) ->
+    InEnc = proplists:get_value(in_encoding, Options, utf8),
+    OutEnc = proplists:get_value(out_encoding, Options, utf8),
+    Flattened = flatten_list(URIString, InEnc),
+    try transcode(Flattened, [], InEnc, OutEnc)
+    catch
+        throw:{error, Atom, RestData} -> {error, Atom, RestData}
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% Functions for working with the query part of a URI as a list
+%% of key/value pairs.
+%% HTML 5.2 - 4.10.21.6 URL-encoded form data - WHATWG URL (10 Jan 2018) - UTF-8
+%% HTML 5.0 - 4.10.22.6 URL-encoded form data - non UTF-8
+%%-------------------------------------------------------------------------
+
+%%-------------------------------------------------------------------------
+%% Compose urlencoded query string from a list of unescaped key/value pairs.
+%% (application/x-www-form-urlencoded encoding algorithm)
+%%-------------------------------------------------------------------------
+-spec compose_query(QueryList) -> QueryString when
+      QueryList :: [{unicode:chardata(), unicode:chardata()}],
+      QueryString :: uri_string()
+                   | error().
+compose_query(List) ->
+    compose_query(List, [{encoding, utf8}]).
+
+
+-spec compose_query(QueryList, Options) -> QueryString when
+      QueryList :: [{unicode:chardata(), unicode:chardata()}],
+      Options :: [{encoding, atom()}],
+      QueryString :: uri_string()
+                   | error().
+compose_query([],_Options) ->
+    [];
+compose_query(List, Options) ->
+    try compose_query(List, Options, false, <<>>)
+    catch
+      throw:{error, Atom, RestData} -> {error, Atom, RestData}
+    end.
+%%
+compose_query([{Key,Value}|Rest], Options, IsList, Acc) ->
+    Separator = get_separator(Rest),
+    K = form_urlencode(Key, Options),
+    V = form_urlencode(Value, Options),
+    IsListNew = IsList orelse is_list(Key) orelse is_list(Value),
+    compose_query(Rest, Options, IsListNew, <<Acc/binary,K/binary,"=",V/binary,Separator/binary>>);
+compose_query([], _Options, IsList, Acc) ->
+    case IsList of
+        true -> convert_to_list(Acc, utf8);
+        false -> Acc
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% Dissect a query string into a list of unescaped key/value pairs.
+%% (application/x-www-form-urlencoded decoding algorithm)
+%%-------------------------------------------------------------------------
+-spec dissect_query(QueryString) -> QueryList when
+      QueryString :: uri_string(),
+      QueryList :: [{unicode:chardata(), unicode:chardata()}]
+                 | error().
+dissect_query(<<>>) ->
+    [];
+dissect_query([]) ->
+    [];
+dissect_query(QueryString) when is_list(QueryString) ->
+    try
+        B = convert_to_binary(QueryString, utf8, utf8),
+        dissect_query_key(B, true, [], <<>>, <<>>)
+    catch
+        throw:{error, Atom, RestData} -> {error, Atom, RestData}
+    end;
+dissect_query(QueryString) ->
+    try dissect_query_key(QueryString, false, [], <<>>, <<>>)
+    catch
+        throw:{error, Atom, RestData} -> {error, Atom, RestData}
+    end.
+
+
+%%%========================================================================
+%%% Internal functions
+%%%========================================================================
+
+%%-------------------------------------------------------------------------
+%% Converts Map fields to lists
+%%-------------------------------------------------------------------------
+convert_mapfields_to_list(Map) ->
+    Fun = fun (_, V) when is_binary(V) -> unicode:characters_to_list(V);
+              (_, V) -> V end,
+    maps:map(Fun, Map).
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 4.1. URI Reference]
+%%
+%% URI-reference is used to denote the most common usage of a resource
+%% identifier.
+%%
+%%    URI-reference = URI / relative-ref
+%%-------------------------------------------------------------------------
+-spec parse_uri_reference(binary(), uri_map()) -> uri_map().
+parse_uri_reference(<<>>, _) -> #{path => <<>>};
+parse_uri_reference(URIString, URI) ->
+    try parse_scheme_start(URIString, URI)
+    catch
+        throw:{_,_,_} ->
+            parse_relative_part(URIString, URI)
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 4.2. Relative Reference]
+%%
+%% A relative reference takes advantage of the hierarchical syntax
+%% (Section 1.2.3) to express a URI reference relative to the name space
+%% of another hierarchical URI.
+%%
+%%    relative-ref  = relative-part [ "?" query ] [ "#" fragment ]
+%%
+%%    relative-part = "//" authority path-abempty
+%%                  / path-absolute
+%%                  / path-noscheme
+%%                  / path-empty
+%%-------------------------------------------------------------------------
+-spec parse_relative_part(binary(), uri_map()) -> uri_map().
+parse_relative_part(?STRING_REST("//", Rest), URI) ->
+    %% Parse userinfo - "//" is NOT part of authority
+    try parse_userinfo(Rest, URI) of
+        {T, URI1} ->
+            Userinfo = calculate_parsed_userinfo(Rest, T),
+            URI2 = maybe_add_path(URI1),
+            URI2#{userinfo => decode_userinfo(Userinfo)}
+    catch
+        throw:{_,_,_} ->
+            {T, URI1} = parse_host(Rest, URI),
+            Host = calculate_parsed_host_port(Rest, T),
+            URI2 = maybe_add_path(URI1),
+            URI2#{host => decode_host(remove_brackets(Host))}
+    end;
+parse_relative_part(?STRING_REST($/, Rest), URI) ->
+    {T, URI1} = parse_segment(Rest, URI),  % path-absolute
+    Path = calculate_parsed_part(Rest, T),
+    URI1#{path => decode_path(?STRING_REST($/, Path))};
+parse_relative_part(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % path-empty ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    URI2 = maybe_add_path(URI1),
+    URI2#{query => decode_query(Query)};
+parse_relative_part(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),  % path-empty
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    URI2 = maybe_add_path(URI1),
+    URI2#{fragment => decode_fragment(Fragment)};
+parse_relative_part(?STRING_REST(Char, Rest), URI) ->
+    case is_segment_nz_nc(Char) of
+        true ->
+            {T, URI1} = parse_segment_nz_nc(Rest, URI),  % path-noscheme
+            Path = calculate_parsed_part(Rest, T),
+            URI1#{path => decode_path(?STRING_REST(Char, Path))};
+        false -> throw({error,invalid_uri,[Char]})
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 3.3. Path]
+%%
+%% The path component contains data, usually organized in hierarchical
+%% form, that, along with data in the non-hierarchical query component
+%% (Section 3.4), serves to identify a resource within the scope of the
+%% URI's scheme and naming authority (if any).  The path is terminated
+%% by the first question mark ("?") or number sign ("#") character, or
+%% by the end of the URI.
+%%
+%%    path          = path-abempty    ; begins with "/" or is empty
+%%                  / path-absolute   ; begins with "/" but not "//"
+%%                  / path-noscheme   ; begins with a non-colon segment
+%%                  / path-rootless   ; begins with a segment
+%%                  / path-empty      ; zero characters
+%%
+%%    path-abempty  = *( "/" segment )
+%%    path-absolute = "/" [ segment-nz *( "/" segment ) ]
+%%    path-noscheme = segment-nz-nc *( "/" segment )
+%%    path-rootless = segment-nz *( "/" segment )
+%%    path-empty    = 0<pchar>
+%%    segment       = *pchar
+%%    segment-nz    = 1*pchar
+%%    segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" )
+%%                  ; non-zero-length segment without any colon ":"
+%%
+%%    pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
+%%-------------------------------------------------------------------------
+
+%%-------------------------------------------------------------------------
+%%    path-abempty
+%%-------------------------------------------------------------------------
+-spec parse_segment(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_segment(?STRING_REST($/, Rest), URI) ->
+    parse_segment(Rest, URI);  % segment
+parse_segment(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_segment(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_segment(?STRING_REST(Char, Rest), URI) ->
+    case is_pchar(Char) of
+        true -> parse_segment(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_segment(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+
+%%-------------------------------------------------------------------------
+%%    path-noscheme
+%%-------------------------------------------------------------------------
+-spec parse_segment_nz_nc(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_segment_nz_nc(?STRING_REST($/, Rest), URI) ->
+    parse_segment(Rest, URI);  % segment
+parse_segment_nz_nc(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_segment_nz_nc(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_segment_nz_nc(?STRING_REST(Char, Rest), URI) ->
+    case is_segment_nz_nc(Char) of
+        true -> parse_segment_nz_nc(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_segment_nz_nc(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+
+%% Check if char is pchar.
+-spec is_pchar(char()) -> boolean().
+is_pchar($%) -> true;  % pct-encoded
+is_pchar($:) -> true;
+is_pchar($@) -> true;
+is_pchar(Char) -> is_unreserved(Char) orelse is_sub_delim(Char).
+
+%% Check if char is segment_nz_nc.
+-spec is_segment_nz_nc(char()) -> boolean().
+is_segment_nz_nc($%) -> true;  % pct-encoded
+is_segment_nz_nc($@) -> true;
+is_segment_nz_nc(Char) -> is_unreserved(Char) orelse is_sub_delim(Char).
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 3.1. Scheme]
+%%
+%% Each URI begins with a scheme name that refers to a specification for
+%% assigning identifiers within that scheme.
+%%
+%%    scheme      = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
+%%-------------------------------------------------------------------------
+-spec parse_scheme_start(binary(), uri_map()) -> uri_map().
+parse_scheme_start(?STRING_REST(Char, Rest), URI) ->
+    case is_alpha(Char) of
+        true  -> {T, URI1} = parse_scheme(Rest, URI),
+                 Scheme = calculate_parsed_scheme(Rest, T),
+                 URI2 = maybe_add_path(URI1),
+		 URI2#{scheme => ?STRING_REST(Char, Scheme)};
+        false -> throw({error,invalid_uri,[Char]})
+    end.
+
+%% Add path component if it missing after parsing the URI.
+%% According to the URI specification there is always a
+%% path component in every URI-reference and it can be
+%% empty.
+maybe_add_path(Map) ->
+    case maps:is_key(path, Map) of
+        false ->
+            Map#{path => <<>>};
+        _Else ->
+            Map
+    end.
+
+
+
+-spec parse_scheme(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_scheme(?STRING_REST($:, Rest), URI) ->
+    {_, URI1} = parse_hier(Rest, URI),
+    {Rest, URI1};
+parse_scheme(?STRING_REST(Char, Rest), URI) ->
+    case is_scheme(Char) of
+        true  -> parse_scheme(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_scheme(?STRING_EMPTY, _URI) ->
+    throw({error,invalid_uri,<<>>}).
+
+
+%% Check if char is allowed in scheme
+-spec is_scheme(char()) -> boolean().
+is_scheme($+) -> true;
+is_scheme($-) -> true;
+is_scheme($.) -> true;
+is_scheme(Char) -> is_alpha(Char) orelse is_digit(Char).
+
+
+%%-------------------------------------------------------------------------
+%%    hier-part   = "//" authority path-abempty
+%%                   / path-absolute
+%%                   / path-rootless
+%%                   / path-empty
+%%-------------------------------------------------------------------------
+-spec parse_hier(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_hier(?STRING_REST("//", Rest), URI) ->
+    % Parse userinfo - "//" is NOT part of authority
+    try parse_userinfo(Rest, URI) of
+        {T, URI1} ->
+            Userinfo = calculate_parsed_userinfo(Rest, T),
+	    {Rest, URI1#{userinfo => decode_userinfo(Userinfo)}}
+    catch
+        throw:{_,_,_} ->
+            {T, URI1} = parse_host(Rest, URI),
+            Host = calculate_parsed_host_port(Rest, T),
+	    {Rest, URI1#{host => decode_host(remove_brackets(Host))}}
+    end;
+parse_hier(?STRING_REST($/, Rest), URI) ->
+    {T, URI1} = parse_segment(Rest, URI),  % path-absolute
+    Path = calculate_parsed_part(Rest, T),
+    {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}};
+parse_hier(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % path-empty ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_hier(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),  % path-empty
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_hier(?STRING_REST(Char, Rest), URI) ->  % path-rootless
+    case is_pchar(Char) of
+        true ->  % segment_nz
+            {T, URI1} = parse_segment(Rest, URI),
+            Path = calculate_parsed_part(Rest, T),
+            {Rest, URI1#{path => decode_path(?STRING_REST(Char, Path))}};
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_hier(?STRING_EMPTY, URI) ->
+    {<<>>, URI}.
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 3.2. Authority]
+%%
+%% Many URI schemes include a hierarchical element for a naming
+%% authority so that governance of the name space defined by the
+%% remainder of the URI is delegated to that authority (which may, in
+%% turn, delegate it further).
+%%
+%% The authority component is preceded by a double slash ("//") and is
+%% terminated by the next slash ("/"), question mark ("?"), or number
+%% sign ("#") character, or by the end of the URI.
+%%
+%%    authority   = [ userinfo "@" ] host [ ":" port ]
+%%
+%%
+%% [RFC 3986, Chapter 3.2.1. User Information]
+%%
+%% The userinfo subcomponent may consist of a user name and, optionally,
+%% scheme-specific information about how to gain authorization to access
+%% the resource. The user information, if present, is followed by a
+%% commercial at-sign ("@") that delimits it from the host.
+%%
+%%    userinfo    = *( unreserved / pct-encoded / sub-delims / ":" )
+%%-------------------------------------------------------------------------
+-spec parse_userinfo(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_userinfo(?CHAR($@), URI) ->
+    {?STRING_EMPTY, URI#{host => <<>>}};
+parse_userinfo(?STRING_REST($@, Rest), URI) ->
+    {T, URI1} = parse_host(Rest, URI),
+    Host = calculate_parsed_host_port(Rest, T),
+    {Rest, URI1#{host => decode_host(remove_brackets(Host))}};
+parse_userinfo(?STRING_REST(Char, Rest), URI) ->
+    case is_userinfo(Char) of
+        true -> parse_userinfo(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_userinfo(?STRING_EMPTY, _URI) ->
+    %% URI cannot end in userinfo state
+    throw({error,invalid_uri,<<>>}).
+
+
+%% Check if char is allowed in userinfo
+-spec is_userinfo(char()) -> boolean().
+is_userinfo($%) -> true;  % pct-encoded
+is_userinfo($:) -> true;
+is_userinfo(Char) -> is_unreserved(Char) orelse is_sub_delim(Char).
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 3.2.2. Host]
+%%
+%% The host subcomponent of authority is identified by an IP literal
+%% encapsulated within square brackets, an IPv4 address in dotted-
+%% decimal form, or a registered name.
+%%
+%%    host        = IP-literal / IPv4address / reg-name
+%%
+%%    IP-literal = "[" ( IPv6address / IPvFuture  ) "]"
+%%
+%%    IPvFuture  = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
+%%
+%%    IPv6address =                            6( h16 ":" ) ls32
+%%                /                       "::" 5( h16 ":" ) ls32
+%%                / [               h16 ] "::" 4( h16 ":" ) ls32
+%%                / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
+%%                / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
+%%                / [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
+%%                / [ *4( h16 ":" ) h16 ] "::"              ls32
+%%                / [ *5( h16 ":" ) h16 ] "::"              h16
+%%                / [ *6( h16 ":" ) h16 ] "::"
+%%
+%%    ls32        = ( h16 ":" h16 ) / IPv4address
+%%                ; least-significant 32 bits of address
+%%
+%%    h16         = 1*4HEXDIG
+%%                ; 16 bits of address represented in hexadecimal
+%%
+%%    IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet
+%%
+%%    dec-octet   = DIGIT                 ; 0-9
+%%                / %x31-39 DIGIT         ; 10-99
+%%                / "1" 2DIGIT            ; 100-199
+%%                / "2" %x30-34 DIGIT     ; 200-249
+%%                / "25" %x30-35          ; 250-255
+%%
+%%    reg-name    = *( unreserved / pct-encoded / sub-delims )
+%%-------------------------------------------------------------------------
+-spec parse_host(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_host(?STRING_REST($:, Rest), URI) ->
+    {T, URI1} = parse_port(Rest, URI),
+    H = calculate_parsed_host_port(Rest, T),
+    Port = get_port(H),
+    {Rest, URI1#{port => Port}};
+parse_host(?STRING_REST($/, Rest), URI) ->
+    {T, URI1} = parse_segment(Rest, URI),  % path-abempty
+    Path = calculate_parsed_part(Rest, T),
+    {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}};
+parse_host(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % path-empty ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_host(?STRING_REST($[, Rest), URI) ->
+    parse_ipv6_bin(Rest, [], URI);
+parse_host(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),  % path-empty
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_host(?STRING_REST(Char, Rest), URI) ->
+    case is_digit(Char) of
+        true -> parse_ipv4_bin(Rest, [Char], URI);
+        false -> parse_reg_name(?STRING_REST(Char, Rest), URI)
+    end;
+parse_host(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+
+-spec parse_reg_name(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_reg_name(?STRING_REST($:, Rest), URI) ->
+    {T, URI1} = parse_port(Rest, URI),
+    H = calculate_parsed_host_port(Rest, T),
+    Port = get_port(H),
+    {Rest, URI1#{port => Port}};
+parse_reg_name(?STRING_REST($/, Rest), URI) ->
+    {T, URI1} = parse_segment(Rest, URI),  % path-abempty
+    Path = calculate_parsed_part(Rest, T),
+    {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}};
+parse_reg_name(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % path-empty ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_reg_name(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),  % path-empty
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_reg_name(?STRING_REST(Char, Rest), URI) ->
+    case is_reg_name(Char) of
+        true -> parse_reg_name(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_reg_name(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+%% Check if char is allowed in reg-name
+-spec is_reg_name(char()) -> boolean().
+is_reg_name($%) -> true;
+is_reg_name(Char) -> is_unreserved(Char) orelse is_sub_delim(Char).
+
+
+-spec parse_ipv4_bin(binary(), list(), uri_map()) -> {binary(), uri_map()}.
+parse_ipv4_bin(?STRING_REST($:, Rest), Acc, URI) ->
+    _ = validate_ipv4_address(lists:reverse(Acc)),
+    {T, URI1} = parse_port(Rest, URI),
+    H = calculate_parsed_host_port(Rest, T),
+    Port = get_port(H),
+    {Rest, URI1#{port => Port}};
+parse_ipv4_bin(?STRING_REST($/, Rest), Acc, URI) ->
+    _ = validate_ipv4_address(lists:reverse(Acc)),
+    {T, URI1} = parse_segment(Rest, URI),  % path-abempty
+    Path = calculate_parsed_part(Rest, T),
+    {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}};
+parse_ipv4_bin(?STRING_REST($?, Rest), Acc, URI) ->
+    _ = validate_ipv4_address(lists:reverse(Acc)),
+    {T, URI1} = parse_query(Rest, URI),  % path-empty ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_ipv4_bin(?STRING_REST($#, Rest), Acc, URI) ->
+    _ = validate_ipv4_address(lists:reverse(Acc)),
+    {T, URI1} = parse_fragment(Rest, URI),  % path-empty
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_ipv4_bin(?STRING_REST(Char, Rest), Acc, URI) ->
+    case is_ipv4(Char) of
+        true -> parse_ipv4_bin(Rest, [Char|Acc], URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_ipv4_bin(?STRING_EMPTY, Acc, URI) ->
+    _ = validate_ipv4_address(lists:reverse(Acc)),
+    {?STRING_EMPTY, URI}.
+
+
+%% Check if char is allowed in IPv4 addresses
+-spec is_ipv4(char()) -> boolean().
+is_ipv4($.) -> true;
+is_ipv4(Char) -> is_digit(Char).
+
+-spec validate_ipv4_address(list()) -> list().
+validate_ipv4_address(Addr) ->
+    case inet:parse_ipv4strict_address(Addr) of
+        {ok, _} -> Addr;
+        {error, _} -> throw({error,invalid_uri,Addr})
+    end.
+
+
+-spec parse_ipv6_bin(binary(), list(), uri_map()) -> {binary(), uri_map()}.
+parse_ipv6_bin(?STRING_REST($], Rest), Acc, URI) ->
+    _ = validate_ipv6_address(lists:reverse(Acc)),
+    parse_ipv6_bin_end(Rest, URI);
+parse_ipv6_bin(?STRING_REST(Char, Rest), Acc, URI) ->
+    case is_ipv6(Char) of
+        true -> parse_ipv6_bin(Rest, [Char|Acc], URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_ipv6_bin(?STRING_EMPTY, _Acc, _URI) ->
+    throw({error,invalid_uri,<<>>}).
+
+%% Check if char is allowed in IPv6 addresses
+-spec is_ipv6(char()) -> boolean().
+is_ipv6($:) -> true;
+is_ipv6($.) -> true;
+is_ipv6(Char) -> is_hex_digit(Char).
+
+
+-spec parse_ipv6_bin_end(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_ipv6_bin_end(?STRING_REST($:, Rest), URI) ->
+    {T, URI1} = parse_port(Rest, URI),
+    H = calculate_parsed_host_port(Rest, T),
+    Port = get_port(H),
+    {Rest, URI1#{port => Port}};
+parse_ipv6_bin_end(?STRING_REST($/, Rest), URI) ->
+    {T, URI1} = parse_segment(Rest, URI),  % path-abempty
+    Path = calculate_parsed_part(Rest, T),
+    {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}};
+parse_ipv6_bin_end(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % path-empty ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_ipv6_bin_end(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),  % path-empty
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_ipv6_bin_end(?STRING_REST(Char, Rest), URI) ->
+    case is_ipv6(Char) of
+        true -> parse_ipv6_bin_end(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_ipv6_bin_end(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+-spec validate_ipv6_address(list()) -> list().
+validate_ipv6_address(Addr) ->
+    case inet:parse_ipv6strict_address(Addr) of
+        {ok, _} -> Addr;
+        {error, _} -> throw({error,invalid_uri,Addr})
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 3.2.2. Port]
+%%
+%% The port subcomponent of authority is designated by an optional port
+%% number in decimal following the host and delimited from it by a
+%% single colon (":") character.
+%%
+%%    port        = *DIGIT
+%%-------------------------------------------------------------------------
+-spec parse_port(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_port(?STRING_REST($/, Rest), URI) ->
+    {T, URI1} = parse_segment(Rest, URI),  % path-abempty
+    Path = calculate_parsed_part(Rest, T),
+    {Rest, URI1#{path => decode_path(?STRING_REST($/, Path))}};
+parse_port(?STRING_REST($?, Rest), URI) ->
+    {T, URI1} = parse_query(Rest, URI),  % path-empty ?query
+    Query = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{query => decode_query(Query)}};
+parse_port(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),  % path-empty
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_port(?STRING_REST(Char, Rest), URI) ->
+    case is_digit(Char) of
+        true -> parse_port(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_port(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 3.4. Query]
+%%
+%% The query component contains non-hierarchical data that, along with
+%% data in the path component (Section 3.3), serves to identify a
+%% resource within the scope of the URI's scheme and naming authority
+%% (if any).  The query component is indicated by the first question
+%% mark ("?") character and terminated by a number sign ("#") character
+%% or by the end of the URI.
+%%
+%%    query       = *( pchar / "/" / "?" )
+%%-------------------------------------------------------------------------
+-spec parse_query(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_query(?STRING_REST($#, Rest), URI) ->
+    {T, URI1} = parse_fragment(Rest, URI),
+    Fragment = calculate_parsed_query_fragment(Rest, T),
+    {Rest, URI1#{fragment => decode_fragment(Fragment)}};
+parse_query(?STRING_REST(Char, Rest), URI) ->
+    case is_query(Char) of
+        true -> parse_query(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_query(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+
+%% Check if char is allowed in query
+-spec is_query(char()) -> boolean().
+is_query($/) -> true;
+is_query($?) -> true;
+is_query(Char) -> is_pchar(Char).
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 3.5. Fragment]
+%%
+%% The fragment identifier component of a URI allows indirect
+%% identification of a secondary resource by reference to a primary
+%% resource and additional identifying information.
+%%
+%%    fragment    = *( pchar / "/" / "?" )
+%%-------------------------------------------------------------------------
+-spec parse_fragment(binary(), uri_map()) -> {binary(), uri_map()}.
+parse_fragment(?STRING_REST(Char, Rest), URI) ->
+    case is_fragment(Char) of
+        true -> parse_fragment(Rest, URI);
+        false -> throw({error,invalid_uri,[Char]})
+    end;
+parse_fragment(?STRING_EMPTY, URI) ->
+    {?STRING_EMPTY, URI}.
+
+
+%% Check if char is allowed in fragment
+-spec is_fragment(char()) -> boolean().
+is_fragment($/) -> true;
+is_fragment($?) -> true;
+is_fragment(Char) -> is_pchar(Char).
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 2.2. Reserved Characters]
+%%
+%%   reserved    = gen-delims / sub-delims
+%%
+%%   gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
+%%
+%%   sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
+%%               / "*" / "+" / "," / ";" / "="
+%%
+%%-------------------------------------------------------------------------
+
+%% Check if char is sub-delim.
+-spec is_sub_delim(char()) -> boolean().
+is_sub_delim($!) -> true;
+is_sub_delim($$) -> true;
+is_sub_delim($&) -> true;
+is_sub_delim($') -> true;
+is_sub_delim($() -> true;
+is_sub_delim($)) -> true;
+
+is_sub_delim($*) -> true;
+is_sub_delim($+) -> true;
+is_sub_delim($,) -> true;
+is_sub_delim($;) -> true;
+is_sub_delim($=) -> true;
+is_sub_delim(_) -> false.
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 2.3. Unreserved Characters]
+%%
+%%   unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"
+%%
+%%-------------------------------------------------------------------------
+-spec is_unreserved(char()) -> boolean().
+is_unreserved($-) -> true;
+is_unreserved($.) -> true;
+is_unreserved($_) -> true;
+is_unreserved($~) -> true;
+is_unreserved(Char) -> is_alpha(Char) orelse is_digit(Char).
+
+-spec is_alpha(char()) -> boolean().
+is_alpha(C)
+  when $A =< C, C =< $Z;
+       $a =< C, C =< $z -> true;
+is_alpha(_) -> false.
+
+-spec is_digit(char()) -> boolean().
+is_digit(C)
+  when $0 =< C, C =< $9 -> true;
+is_digit(_) -> false.
+
+-spec is_hex_digit(char()) -> boolean().
+is_hex_digit(C)
+  when $0 =< C, C =< $9;$a =< C, C =< $f;$A =< C, C =< $F -> true;
+is_hex_digit(_) -> false.
+
+
+%% Remove enclosing brackets from binary
+-spec remove_brackets(binary()) -> binary().
+remove_brackets(<<$[/utf8, Rest/binary>>) ->
+    {H,T} = split_binary(Rest, byte_size(Rest) - 1),
+    case T =:= <<$]/utf8>> of
+        true -> H;
+        false -> Rest
+    end;
+remove_brackets(Addr) -> Addr.
+
+
+%%-------------------------------------------------------------------------
+%% Helper functions for calculating the parsed binary.
+%%-------------------------------------------------------------------------
+-spec calculate_parsed_scheme(binary(), binary()) -> binary().
+calculate_parsed_scheme(Input, <<>>) ->
+    strip_last_char(Input, [$:]);
+calculate_parsed_scheme(Input, Unparsed) ->
+    get_parsed_binary(Input, Unparsed).
+
+
+-spec calculate_parsed_part(binary(), binary()) -> binary().
+calculate_parsed_part(Input, <<>>) ->
+    strip_last_char(Input, [$?,$#]);
+calculate_parsed_part(Input, Unparsed) ->
+    get_parsed_binary(Input, Unparsed).
+
+
+-spec calculate_parsed_userinfo(binary(), binary()) -> binary().
+calculate_parsed_userinfo(Input, <<>>) ->
+    strip_last_char(Input, [$?,$#,$@]);
+calculate_parsed_userinfo(Input, Unparsed) ->
+    get_parsed_binary(Input, Unparsed).
+
+
+-spec calculate_parsed_host_port(binary(), binary()) -> binary().
+calculate_parsed_host_port(Input, <<>>) ->
+    strip_last_char(Input, [$:,$?,$#,$/]);
+calculate_parsed_host_port(Input, Unparsed) ->
+    get_parsed_binary(Input, Unparsed).
+
+
+calculate_parsed_query_fragment(Input, <<>>) ->
+    strip_last_char(Input, [$#]);
+calculate_parsed_query_fragment(Input, Unparsed) ->
+    get_parsed_binary(Input, Unparsed).
+
+
+get_port(<<>>) ->
+    undefined;
+get_port(B) ->
+    try binary_to_integer(B)
+    catch
+        error:badarg ->
+            throw({error, invalid_uri, B})
+    end.
+
+
+%% Strip last char if it is in list
+%%
+%% This function is optimized for speed: parse/1 is about 10% faster than
+%% with an alternative implementation based on lists and sets.
+strip_last_char(<<>>, _) -> <<>>;
+strip_last_char(Input, [C0]) ->
+    case binary:last(Input) of
+        C0 ->
+            init_binary(Input);
+        _Else ->
+            Input
+    end;
+strip_last_char(Input, [C0,C1]) ->
+    case binary:last(Input) of
+        C0 ->
+            init_binary(Input);
+        C1 ->
+            init_binary(Input);
+        _Else ->
+            Input
+    end;
+strip_last_char(Input, [C0,C1,C2]) ->
+    case binary:last(Input) of
+        C0 ->
+            init_binary(Input);
+        C1 ->
+            init_binary(Input);
+        C2 ->
+            init_binary(Input);
+        _Else ->
+            Input
+    end;
+strip_last_char(Input, [C0,C1,C2,C3]) ->
+    case binary:last(Input) of
+        C0 ->
+            init_binary(Input);
+        C1 ->
+            init_binary(Input);
+        C2 ->
+            init_binary(Input);
+        C3 ->
+            init_binary(Input);
+        _Else ->
+            Input
+    end.
+
+
+%% Get parsed binary
+get_parsed_binary(Input, Unparsed) ->
+    {First, _} = split_binary(Input, byte_size(Input) - byte_size_exl_head(Unparsed)),
+    First.
+
+
+%% Return all bytes of the binary except the last one. The binary must be non-empty.
+init_binary(B) ->
+    {Init, _} =
+        split_binary(B, byte_size(B) - 1),
+    Init.
+
+
+%% Returns the size of a binary exluding the first element.
+%% Used in calls to split_binary().
+-spec byte_size_exl_head(binary()) -> number().
+byte_size_exl_head(<<>>) -> 0;
+byte_size_exl_head(Binary) -> byte_size(Binary) + 1.
+
+
+%%-------------------------------------------------------------------------
+%% [RFC 3986, Chapter 2.1.  Percent-Encoding]
+%%
+%% A percent-encoding mechanism is used to represent a data octet in a
+%% component when that octet's corresponding character is outside the
+%% allowed set or is being used as a delimiter of, or within, the
+%% component.  A percent-encoded octet is encoded as a character
+%% triplet, consisting of the percent character "%" followed by the two
+%% hexadecimal digits representing that octet's numeric value.  For
+%% example, "%20" is the percent-encoding for the binary octet
+%% "00100000" (ABNF: %x20), which in US-ASCII corresponds to the space
+%% character (SP).  Section 2.4 describes when percent-encoding and
+%% decoding is applied.
+%%
+%%   pct-encoded = "%" HEXDIG HEXDIG
+%%-------------------------------------------------------------------------
+-spec decode_userinfo(binary()) -> binary().
+decode_userinfo(Cs) ->
+    check_utf8(decode(Cs, fun is_userinfo/1, <<>>)).
+
+-spec decode_host(binary()) -> binary().
+decode_host(Cs) ->
+    check_utf8(decode(Cs, fun is_host/1, <<>>)).
+
+-spec decode_path(binary()) -> binary().
+decode_path(Cs) ->
+    check_utf8(decode(Cs, fun is_path/1, <<>>)).
+
+-spec decode_query(binary()) -> binary().
+decode_query(Cs) ->
+    check_utf8(decode(Cs, fun is_query/1, <<>>)).
+
+-spec decode_fragment(binary()) -> binary().
+decode_fragment(Cs) ->
+    check_utf8(decode(Cs, fun is_fragment/1, <<>>)).
+
+
+%% Returns Cs if it is utf8 encoded.
+check_utf8(Cs) ->
+    case unicode:characters_to_list(Cs) of
+        {incomplete,_,_} ->
+            throw({error,invalid_utf8,Cs});
+        {error,_,_} ->
+            throw({error,invalid_utf8,Cs});
+        _ -> Cs
+    end.
+
+%%-------------------------------------------------------------------------
+%% Percent-encode
+%%-------------------------------------------------------------------------
+
+%% Only validates as scheme cannot have percent-encoded characters
+-spec encode_scheme(list()|binary()) -> list() | binary().
+encode_scheme([]) ->
+    throw({error,invalid_scheme,""});
+encode_scheme(<<>>) ->
+    throw({error,invalid_scheme,<<>>});
+encode_scheme(Scheme) ->
+    case validate_scheme(Scheme) of
+        true -> Scheme;
+        false -> throw({error,invalid_scheme,Scheme})
+    end.
+
+-spec encode_userinfo(list()|binary()) -> list() | binary().
+encode_userinfo(Cs) ->
+    encode(Cs, fun is_userinfo/1).
+
+-spec encode_host(list()|binary()) -> list() | binary().
+encode_host(Cs) ->
+    case classify_host(Cs) of
+        regname -> Cs;
+        ipv4 -> Cs;
+        ipv6 -> bracket_ipv6(Cs);
+        other -> encode(Cs, fun is_reg_name/1)
+    end.
+
+-spec encode_path(list()|binary()) -> list() | binary().
+encode_path(Cs) ->
+    encode(Cs, fun is_path/1).
+
+-spec encode_query(list()|binary()) -> list() | binary().
+encode_query(Cs) ->
+    encode(Cs, fun is_query/1).
+
+-spec encode_fragment(list()|binary()) -> list() | binary().
+encode_fragment(Cs) ->
+    encode(Cs, fun is_fragment/1).
+
+%%-------------------------------------------------------------------------
+%% Helper funtions for percent-decode
+%%-------------------------------------------------------------------------
+decode(<<$%,C0,C1,Cs/binary>>, Fun, Acc) ->
+    case is_hex_digit(C0) andalso is_hex_digit(C1) of
+        true ->
+            B = ?HEX2DEC(C0)*16+?HEX2DEC(C1),
+            decode(Cs, Fun, <<Acc/binary, B>>);
+        false -> throw({error,invalid_percent_encoding,<<$%,C0,C1>>})
+    end;
+decode(<<C,Cs/binary>>, Fun, Acc) ->
+    case Fun(C) of
+        true -> decode(Cs, Fun, <<Acc/binary, C>>);
+        false -> throw({error,invalid_percent_encoding,<<C,Cs/binary>>})
+    end;
+decode(<<>>, _Fun, Acc) ->
+    Acc.
+
+%% Check if char is allowed in host
+-spec is_host(char()) -> boolean().
+is_host($:) -> true;
+is_host(Char) -> is_unreserved(Char) orelse is_sub_delim(Char).
+
+%% Check if char is allowed in path
+-spec is_path(char()) -> boolean().
+is_path($/) -> true;
+is_path(Char) -> is_pchar(Char).
+
+
+%%-------------------------------------------------------------------------
+%% Helper functions for percent-encode
+%%-------------------------------------------------------------------------
+-spec encode(list()|binary(), fun()) -> list() | binary().
+encode(Component, Fun) when is_list(Component) ->
+    B = unicode:characters_to_binary(Component),
+    unicode:characters_to_list(encode(B, Fun, <<>>));
+encode(Component, Fun) when is_binary(Component) ->
+    encode(Component, Fun, <<>>).
+%%
+encode(<<Char/utf8, Rest/binary>>, Fun, Acc) ->
+    C = encode_codepoint_binary(Char, Fun),
+    encode(Rest, Fun, <<Acc/binary,C/binary>>);
+encode(<<Char, Rest/binary>>, _Fun, _Acc) ->
+    throw({error,invalid_input,<<Char,Rest/binary>>});
+encode(<<>>, _Fun, Acc) ->
+    Acc.
+
+
+-spec encode_codepoint_binary(integer(), fun()) -> binary().
+encode_codepoint_binary(C, Fun) ->
+    case Fun(C) of
+        false -> percent_encode_binary(C);
+        true -> <<C>>
+    end.
+
+
+-spec percent_encode_binary(integer()) -> binary().
+percent_encode_binary(Code) ->
+    percent_encode_binary(<<Code/utf8>>, <<>>).
+
+
+percent_encode_binary(<<A:4,B:4,Rest/binary>>, Acc) ->
+    percent_encode_binary(Rest, <<Acc/binary,$%,(?DEC2HEX(A)),(?DEC2HEX(B))>>);
+percent_encode_binary(<<>>, Acc) ->
+    Acc.
+
+
+%%-------------------------------------------------------------------------
+%%-------------------------------------------------------------------------
+validate_scheme([]) -> true;
+validate_scheme([H|T]) ->
+    case is_scheme(H) of
+        true -> validate_scheme(T);
+        false -> false
+    end;
+validate_scheme(<<>>) -> true;
+validate_scheme(<<H, Rest/binary>>) ->
+    case is_scheme(H) of
+        true -> validate_scheme(Rest);
+        false -> false
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% Classifies hostname into the following categories:
+%% regname, ipv4 - address does not contain reserved characters to be
+%%           percent-encoded
+%% ipv6 - address does not contain reserved characters but it shall be
+%%        encolsed in brackets
+%% other - address shall be percent-encoded
+%%-------------------------------------------------------------------------
+classify_host([]) -> other;
+classify_host(Addr) when is_binary(Addr) ->
+    A = unicode:characters_to_list(Addr),
+    classify_host_ipv6(A);
+classify_host(Addr) ->
+    classify_host_ipv6(Addr).
+
+classify_host_ipv6(Addr) ->
+    case is_ipv6_address(Addr) of
+        true -> ipv6;
+        false -> classify_host_ipv4(Addr)
+    end.
+
+classify_host_ipv4(Addr) ->
+    case is_ipv4_address(Addr) of
+        true -> ipv4;
+        false -> classify_host_regname(Addr)
+    end.
+
+classify_host_regname([]) -> regname;
+classify_host_regname([H|T]) ->
+    case is_reg_name(H) of
+        true -> classify_host_regname(T);
+        false -> other
+    end.
+
+is_ipv4_address(Addr) ->
+    case inet:parse_ipv4strict_address(Addr) of
+        {ok, _} -> true;
+        {error, _} -> false
+    end.
+
+is_ipv6_address(Addr) ->
+    case inet:parse_ipv6strict_address(Addr) of
+        {ok, _} -> true;
+        {error, _} -> false
+    end.
+
+bracket_ipv6(Addr) when is_binary(Addr) ->
+    concat(<<$[,Addr/binary>>,<<$]>>);
+bracket_ipv6(Addr) when is_list(Addr) ->
+    [$[|Addr] ++ "]".
+
+
+%%-------------------------------------------------------------------------
+%% Helper funtions for recompose
+%%-------------------------------------------------------------------------
+
+%%-------------------------------------------------------------------------
+%% Checks if input Map has valid combination of fields that can be
+%% recomposed into a URI.
+%%
+%% The implementation is based on a decision tree that fulfills the
+%% following rules:
+%%   - 'path' shall always be present in the input map
+%%       URI         = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
+%%       hier-part   = "//" authority path-abempty
+%%                      / path-absolute
+%%                      / path-rootless
+%%                      / path-empty
+%%   - 'host' shall be present in the input map when 'path' starts with
+%%     two slashes ("//")
+%%       path          = path-abempty    ; begins with "/" or is empty
+%%                     / path-absolute   ; begins with "/" but not "//"
+%%                     / path-noscheme   ; begins with a non-colon segment
+%%                     / path-rootless   ; begins with a segment
+%%                     / path-empty      ; zero characters
+%%       path-abempty  = *( "/" segment )
+%%       segment       = *pchar
+%%   - 'host' shall be present if userinfo or port is present in input map
+%%       authority   = [ userinfo "@" ] host [ ":" port ]
+%%   - All fields shall be valid (scheme, userinfo, host, port, path, query
+%%     or fragment).
+%%-------------------------------------------------------------------------
+is_valid_map(#{path := Path} = Map) ->
+    ((starts_with_two_slash(Path) andalso is_valid_map_host(Map))
+     orelse
+       (maps:is_key(userinfo, Map) andalso is_valid_map_host(Map))
+     orelse
+       (maps:is_key(port, Map) andalso is_valid_map_host(Map))
+     orelse
+     all_fields_valid(Map));
+is_valid_map(#{}) ->
+    false.
+
+
+is_valid_map_host(Map) ->
+    maps:is_key(host, Map) andalso all_fields_valid(Map).
+
+
+all_fields_valid(Map) ->
+    Fun = fun(scheme, _, Acc) -> Acc;
+             (userinfo, _, Acc) -> Acc;
+             (host, _, Acc) -> Acc;
+             (port, _, Acc) -> Acc;
+             (path, _, Acc) -> Acc;
+             (query, _, Acc) -> Acc;
+             (fragment, _, Acc) -> Acc;
+             (_, _, _) -> false
+          end,
+    maps:fold(Fun, true, Map).
+
+
+starts_with_two_slash([$/,$/|_]) ->
+    true;
+starts_with_two_slash(?STRING_REST("//", _)) ->
+    true;
+starts_with_two_slash(_) -> false.
+
+
+update_scheme(#{scheme := Scheme}, _) ->
+    add_colon_postfix(encode_scheme(Scheme));
+update_scheme(#{}, _) ->
+    empty.
+
+
+update_userinfo(#{userinfo := Userinfo}, empty) ->
+    add_auth_prefix(encode_userinfo(Userinfo));
+update_userinfo(#{userinfo := Userinfo}, URI) ->
+    concat(URI,add_auth_prefix(encode_userinfo(Userinfo)));
+update_userinfo(#{}, empty) ->
+    empty;
+update_userinfo(#{}, URI) ->
+    URI.
+
+
+update_host(#{host := Host}, empty) ->
+    add_auth_prefix(encode_host(Host));
+update_host(#{host := Host} = Map, URI) ->
+    concat(URI,add_host_prefix(Map, encode_host(Host)));
+update_host(#{}, empty) ->
+    empty;
+update_host(#{}, URI) ->
+    URI.
+
+
+%% URI cannot be empty for ports. E.g. ":8080" is not a valid URI
+update_port(#{port := undefined}, URI) ->
+    concat(URI, <<":">>);
+update_port(#{port := Port}, URI) ->
+    concat(URI,add_colon(encode_port(Port)));
+update_port(#{}, URI) ->
+    URI.
+
+
+update_path(#{path := Path}, empty) ->
+    encode_path(Path);
+update_path(#{path := Path}, URI) ->
+    concat(URI,encode_path(Path));
+update_path(#{}, empty) ->
+    empty;
+update_path(#{}, URI) ->
+    URI.
+
+
+update_query(#{query := Query}, empty) ->
+    encode_query(Query);
+update_query(#{query := Query}, URI) ->
+    concat(URI,add_question_mark(encode_query(Query)));
+update_query(#{}, empty) ->
+    empty;
+update_query(#{}, URI) ->
+    URI.
+
+
+update_fragment(#{fragment := Fragment}, empty) ->
+    add_hashmark(encode_fragment(Fragment));
+update_fragment(#{fragment := Fragment}, URI) ->
+    concat(URI,add_hashmark(encode_fragment(Fragment)));
+update_fragment(#{}, empty) ->
+    "";
+update_fragment(#{}, URI) ->
+    URI.
+
+%%-------------------------------------------------------------------------
+%% Concatenates its arguments that can be lists and binaries.
+%% The result is a list if at least one of its argument is a list and
+%% binary otherwise.
+%%-------------------------------------------------------------------------
+concat(A, B) when is_binary(A), is_binary(B) ->
+    <<A/binary, B/binary>>;
+concat(A, B) when is_binary(A), is_list(B) ->
+    unicode:characters_to_list(A) ++ B;
+concat(A, B) when is_list(A) ->
+    A ++ maybe_to_list(B).
+
+add_hashmark(Comp) when is_binary(Comp) ->
+    <<$#, Comp/binary>>;
+add_hashmark(Comp) when is_list(Comp) ->
+    [$#|Comp].
+
+add_question_mark(Comp) when is_binary(Comp) ->
+    <<$?, Comp/binary>>;
+add_question_mark(Comp) when is_list(Comp) ->
+    [$?|Comp].
+
+add_colon(Comp) when is_binary(Comp) ->
+    <<$:, Comp/binary>>.
+
+add_colon_postfix(Comp) when is_binary(Comp) ->
+    <<Comp/binary,$:>>;
+add_colon_postfix(Comp) when is_list(Comp) ->
+    Comp ++ ":".
+
+add_auth_prefix(Comp) when is_binary(Comp) ->
+    <<"//", Comp/binary>>;
+add_auth_prefix(Comp) when is_list(Comp) ->
+    [$/,$/|Comp].
+
+add_host_prefix(#{userinfo := _}, Host) when is_binary(Host) ->
+    <<$@,Host/binary>>;
+add_host_prefix(#{}, Host) when is_binary(Host) ->
+    <<"//",Host/binary>>;
+add_host_prefix(#{userinfo := _}, Host) when is_list(Host) ->
+    [$@|Host];
+add_host_prefix(#{}, Host) when is_list(Host) ->
+    [$/,$/|Host].
+
+maybe_to_list(Comp) when is_binary(Comp) -> unicode:characters_to_list(Comp);
+maybe_to_list(Comp) -> Comp.
+
+encode_port(Port) ->
+    integer_to_binary(Port).
+
+%%-------------------------------------------------------------------------
+%% Helper functions for transcode
+%%-------------------------------------------------------------------------
+
+%%-------------------------------------------------------------------------
+%% uri_string:transcode(<<"x%00%00%00%F6"/utf32>>).
+%% 1. Convert (transcode/2) input to list form (list of unicode codepoints)
+%%    "x%00%00%00%F6"
+%% 2. Accumulate characters until percent-encoded segment (transcode/4).
+%%    Acc = "x"
+%% 3. Convert percent-encoded triplets to binary form (transcode_pct/4)
+%%    <<0,0,0,246>>
+%% 4. Transcode in-encoded binary to out-encoding (utf32 -> utf8):
+%%    <<195,182>>
+%% 5. Percent-encode out-encoded binary:
+%%    <<"%C3%B6"/utf8>> = <<37,67,51,37,66,54>>
+%% 6. Convert binary to list form, reverse it and append the accumulator
+%%    "6B%3C%" + "x"
+%% 7. Reverse Acc and return it
+%%-------------------------------------------------------------------------
+transcode([$%,_C0,_C1|_Rest] = L, Acc, InEnc, OutEnc) ->
+    transcode_pct(L, Acc, <<>>, InEnc, OutEnc);
+transcode([_C|_Rest] = L, Acc, InEnc, OutEnc) ->
+    transcode(L, Acc, [], InEnc, OutEnc).
+%%
+transcode([$%,_C0,_C1|_Rest] = L, Acc, List, InEncoding, OutEncoding) ->
+    transcode_pct(L, List ++ Acc, <<>>, InEncoding, OutEncoding);
+transcode([C|Rest], Acc, List, InEncoding, OutEncoding) ->
+    transcode(Rest, Acc, [C|List], InEncoding, OutEncoding);
+transcode([], Acc, List, _InEncoding, _OutEncoding) ->
+    lists:reverse(List ++ Acc).
+
+
+%% Transcode percent-encoded segment
+transcode_pct([$%,C0,C1|Rest] = L, Acc, B, InEncoding, OutEncoding) ->
+    case is_hex_digit(C0) andalso is_hex_digit(C1) of
+        true ->
+            Int = ?HEX2DEC(C0)*16+?HEX2DEC(C1),
+            transcode_pct(Rest, Acc, <<B/binary, Int>>, InEncoding, OutEncoding);
+        false -> throw({error, invalid_percent_encoding,L})
+    end;
+transcode_pct([_C|_Rest] = L, Acc, B, InEncoding, OutEncoding) ->
+    OutBinary = convert_to_binary(B, InEncoding, OutEncoding),
+    PctEncUtf8 = percent_encode_segment(OutBinary),
+    Out = lists:reverse(convert_to_list(PctEncUtf8, utf8)),
+    transcode(L, Out ++ Acc, [], InEncoding, OutEncoding);
+transcode_pct([], Acc, B, InEncoding, OutEncoding) ->
+    OutBinary = convert_to_binary(B, InEncoding, OutEncoding),
+    PctEncUtf8 = percent_encode_segment(OutBinary),
+    Out = convert_to_list(PctEncUtf8, utf8),
+    lists:reverse(Acc) ++ Out.
+
+
+%% Convert to binary
+convert_to_binary(Binary, InEncoding, OutEncoding) ->
+    case unicode:characters_to_binary(Binary, InEncoding, OutEncoding) of
+        {error, _List, RestData} ->
+            throw({error, invalid_input, RestData});
+        {incomplete, _List, RestData} ->
+            throw({error, invalid_input, RestData});
+        Result ->
+            Result
+    end.
+
+
+%% Convert to list
+convert_to_list(Binary, InEncoding) ->
+    case unicode:characters_to_list(Binary, InEncoding) of
+        {error, _List, RestData} ->
+            throw({error, invalid_input, RestData});
+        {incomplete, _List, RestData} ->
+            throw({error, invalid_input, RestData});
+        Result ->
+            Result
+    end.
+
+
+%% Flatten input list
+flatten_list([], _) ->
+    [];
+flatten_list(L, InEnc) ->
+    flatten_list(L, InEnc, []).
+%%
+flatten_list([H|T], InEnc, Acc) when is_binary(H) ->
+    L = convert_to_list(H, InEnc),
+    flatten_list(T, InEnc, lists:reverse(L) ++ Acc);
+flatten_list([H|T], InEnc, Acc) when is_list(H) ->
+    flatten_list(H ++ T, InEnc, Acc);
+flatten_list([H|T], InEnc, Acc) ->
+    flatten_list(T, InEnc, [H|Acc]);
+flatten_list([], _InEnc, Acc) ->
+    lists:reverse(Acc);
+flatten_list(Arg, _, _) ->
+    throw({error, invalid_input, Arg}).
+
+
+percent_encode_segment(Segment) ->
+    percent_encode_binary(Segment, <<>>).
+
+
+%%-------------------------------------------------------------------------
+%% Helper functions for compose_query
+%%-------------------------------------------------------------------------
+
+%% Returns separator to be used between key-value pairs
+get_separator(L) when length(L) =:= 0 ->
+    <<>>;
+get_separator(_L) ->
+    <<"&">>.
+
+
+%% HTML 5.2 - 4.10.21.6 URL-encoded form data - WHATWG URL (10 Jan 2018) - UTF-8
+%% HTML 5.0 - 4.10.22.6 URL-encoded form data - encoding (non UTF-8)
+form_urlencode(Cs, [{encoding, latin1}]) when is_list(Cs) ->
+    B = convert_to_binary(Cs, utf8, utf8),
+    html5_byte_encode(base10_encode(B));
+form_urlencode(Cs, [{encoding, latin1}]) when is_binary(Cs) ->
+    html5_byte_encode(base10_encode(Cs));
+form_urlencode(Cs, [{encoding, Encoding}])
+  when is_list(Cs), Encoding =:= utf8; Encoding =:= unicode ->
+    B = convert_to_binary(Cs, utf8, Encoding),
+    html5_byte_encode(B);
+form_urlencode(Cs, [{encoding, Encoding}])
+  when is_binary(Cs), Encoding =:= utf8; Encoding =:= unicode ->
+    html5_byte_encode(Cs);
+form_urlencode(Cs, [{encoding, Encoding}]) when is_list(Cs); is_binary(Cs) ->
+    throw({error,invalid_encoding, Encoding});
+form_urlencode(Cs, _) ->
+    throw({error,invalid_input, Cs}).
+
+
+%% For each character in the entry's name and value that cannot be expressed using
+%% the selected character encoding, replace the character by a string consisting of
+%% a U+0026 AMPERSAND character (&), a "#" (U+0023) character, one or more ASCII
+%% digits representing the Unicode code point of the character in base ten, and
+%% finally a ";" (U+003B) character.
+base10_encode(Cs) ->
+    base10_encode(Cs, <<>>).
+%%
+base10_encode(<<>>, Acc) ->
+    Acc;
+base10_encode(<<H/utf8,T/binary>>, Acc) when H > 255 ->
+    Base10 = convert_to_binary(integer_to_list(H,10), utf8, utf8),
+    base10_encode(T, <<Acc/binary,"&#",Base10/binary,$;>>);
+base10_encode(<<H/utf8,T/binary>>, Acc) ->
+    base10_encode(T, <<Acc/binary,H>>).
+
+
+html5_byte_encode(B) ->
+    html5_byte_encode(B, <<>>).
+%%
+html5_byte_encode(<<>>, Acc) ->
+    Acc;
+html5_byte_encode(<<$ ,T/binary>>, Acc) ->
+    html5_byte_encode(T, <<Acc/binary,$+>>);
+html5_byte_encode(<<H,T/binary>>, Acc) ->
+    case is_url_char(H) of
+        true ->
+            html5_byte_encode(T, <<Acc/binary,H>>);
+        false ->
+            <<A:4,B:4>> = <<H>>,
+            html5_byte_encode(T, <<Acc/binary,$%,(?DEC2HEX(A)),(?DEC2HEX(B))>>)
+    end;
+html5_byte_encode(H, _Acc) ->
+    throw({error,invalid_input, H}).
+
+
+%% Return true if input char can appear in form-urlencoded string
+%% Allowed chararacters:
+%%   0x2A, 0x2D, 0x2E, 0x30 to 0x39, 0x41 to 0x5A,
+%%   0x5F, 0x61 to 0x7A
+is_url_char(C)
+  when C =:= 16#2A; C =:= 16#2D;
+       C =:= 16#2E; C =:= 16#5F;
+       16#30 =< C, C =< 16#39;
+       16#41 =< C, C =< 16#5A;
+       16#61 =< C, C =< 16#7A -> true;
+is_url_char(_) -> false.
+
+
+%%-------------------------------------------------------------------------
+%% Helper functions for dissect_query
+%%-------------------------------------------------------------------------
+dissect_query_key(<<$=,T/binary>>, IsList, Acc, Key, Value) ->
+    dissect_query_value(T, IsList, Acc, Key, Value);
+dissect_query_key(<<"&#",T/binary>>, IsList, Acc, Key, Value) ->
+    dissect_query_key(T, IsList, Acc, <<Key/binary,"&#">>, Value);
+dissect_query_key(<<$&,_T/binary>>, _IsList, _Acc, _Key, _Value) ->
+    throw({error, missing_value, "&"});
+dissect_query_key(<<H,T/binary>>, IsList, Acc, Key, Value) ->
+    dissect_query_key(T, IsList, Acc, <<Key/binary,H>>, Value);
+dissect_query_key(B, _, _, _, _) ->
+    throw({error, missing_value, B}).
+
+
+dissect_query_value(<<$&,T/binary>>, IsList, Acc, Key, Value) ->
+    K = form_urldecode(IsList, Key),
+    V = form_urldecode(IsList, Value),
+    dissect_query_key(T, IsList, [{K,V}|Acc], <<>>, <<>>);
+dissect_query_value(<<H,T/binary>>, IsList, Acc, Key, Value) ->
+    dissect_query_value(T, IsList, Acc, Key, <<Value/binary,H>>);
+dissect_query_value(<<>>, IsList, Acc, Key, Value) ->
+    K = form_urldecode(IsList, Key),
+    V = form_urldecode(IsList, Value),
+    lists:reverse([{K,V}|Acc]).
+
+
+%% HTML 5.2 - 4.10.21.6 URL-encoded form data - WHATWG URL (10 Jan 2018) - UTF-8
+%% HTML 5.0 - 4.10.22.6 URL-encoded form data - decoding (non UTF-8)
+form_urldecode(true, B) ->
+    Result = base10_decode(form_urldecode(B, <<>>)),
+    convert_to_list(Result, utf8);
+form_urldecode(false, B) ->
+    base10_decode(form_urldecode(B, <<>>));
+form_urldecode(<<>>, Acc) ->
+    Acc;
+form_urldecode(<<$+,T/binary>>, Acc) ->
+    form_urldecode(T, <<Acc/binary,$ >>);
+form_urldecode(<<$%,C0,C1,T/binary>>, Acc) ->
+    case is_hex_digit(C0) andalso is_hex_digit(C1) of
+        true ->
+            V = ?HEX2DEC(C0)*16+?HEX2DEC(C1),
+            form_urldecode(T, <<Acc/binary, V>>);
+        false ->
+            L = convert_to_list(<<$%,C0,C1,T/binary>>, utf8),
+            throw({error, invalid_percent_encoding, L})
+    end;
+form_urldecode(<<H/utf8,T/binary>>, Acc) ->
+    form_urldecode(T, <<Acc/binary,H/utf8>>);
+form_urldecode(<<H,_/binary>>, _Acc) ->
+    throw({error, invalid_character, [H]}).
+
+base10_decode(Cs) ->
+    base10_decode(Cs, <<>>).
+%
+base10_decode(<<>>, Acc) ->
+    Acc;
+base10_decode(<<"&#",T/binary>>, Acc) ->
+    base10_decode_unicode(T, Acc);
+base10_decode(<<H/utf8,T/binary>>, Acc) ->
+    base10_decode(T,<<Acc/binary,H/utf8>>);
+base10_decode(<<H,_/binary>>, _) ->
+    throw({error, invalid_input, [H]}).
+
+
+base10_decode_unicode(B, Acc) ->
+    base10_decode_unicode(B, 0, Acc).
+%%
+base10_decode_unicode(<<H/utf8,T/binary>>, Codepoint, Acc) when $0 =< H, H =< $9 ->
+    Res = Codepoint * 10 + (H - $0),
+    base10_decode_unicode(T, Res, Acc);
+base10_decode_unicode(<<$;,T/binary>>, Codepoint, Acc) ->
+    base10_decode(T, <<Acc/binary,Codepoint/utf8>>);
+base10_decode_unicode(<<H,_/binary>>, _, _) ->
+    throw({error, invalid_input, [H]}).
+
+
+%%-------------------------------------------------------------------------
+%% Helper functions for normalize
+%%-------------------------------------------------------------------------
+
+normalize_map(URIMap) ->
+      normalize_path_segment(
+        normalize_scheme_based(
+          normalize_case(URIMap))).
+
+
+%% 6.2.2.1.  Case Normalization
+normalize_case(#{scheme := Scheme, host := Host} = Map) ->
+    Map#{scheme => to_lower(Scheme),
+         host => to_lower(Host)};
+normalize_case(#{host := Host} = Map) ->
+    Map#{host => to_lower(Host)};
+normalize_case(#{scheme := Scheme} = Map) ->
+    Map#{scheme => to_lower(Scheme)};
+normalize_case(#{} = Map) ->
+    Map.
+
+
+to_lower(Cs) when is_list(Cs) ->
+    B = convert_to_binary(Cs, utf8, utf8),
+    convert_to_list(to_lower(B), utf8);
+to_lower(Cs) when is_binary(Cs) ->
+    to_lower(Cs, <<>>).
+%%
+to_lower(<<C,Cs/binary>>, Acc) when $A =< C, C =< $Z ->
+    to_lower(Cs, <<Acc/binary,(C + 32)>>);
+to_lower(<<C,Cs/binary>>, Acc) ->
+    to_lower(Cs, <<Acc/binary,C>>);
+to_lower(<<>>, Acc) ->
+    Acc.
+
+
+%% 6.2.2.3. Path Segment Normalization
+%% 5.2.4.   Remove Dot Segments
+normalize_path_segment(Map) ->
+    Path = maps:get(path, Map, undefined),
+    Map#{path => remove_dot_segments(Path)}.
+
+
+remove_dot_segments(Path) when is_binary(Path) ->
+    remove_dot_segments(Path, <<>>);
+remove_dot_segments(Path) when is_list(Path) ->
+    B = convert_to_binary(Path, utf8, utf8),
+    B1 = remove_dot_segments(B, <<>>),
+    convert_to_list(B1, utf8).
+%%
+remove_dot_segments(<<>>, Output) ->
+    Output;
+remove_dot_segments(<<"../",T/binary>>, Output) ->
+    remove_dot_segments(T, Output);
+remove_dot_segments(<<"./",T/binary>>, Output) ->
+    remove_dot_segments(T, Output);
+remove_dot_segments(<<"/./",T/binary>>, Output) ->
+    remove_dot_segments(<<$/,T/binary>>, Output);
+remove_dot_segments(<<"/.">>, Output) ->
+    remove_dot_segments(<<$/>>, Output);
+remove_dot_segments(<<"/../",T/binary>>, Output) ->
+    Out1 = remove_last_segment(Output),
+    remove_dot_segments(<<$/,T/binary>>, Out1);
+remove_dot_segments(<<"/..">>, Output) ->
+    Out1 = remove_last_segment(Output),
+    remove_dot_segments(<<$/>>, Out1);
+remove_dot_segments(<<$.>>, Output) ->
+    remove_dot_segments(<<>>, Output);
+remove_dot_segments(<<"..">>, Output) ->
+    remove_dot_segments(<<>>, Output);
+remove_dot_segments(Input, Output) ->
+    {First, Rest} = first_path_segment(Input),
+    remove_dot_segments(Rest, <<Output/binary,First/binary>>).
+
+
+first_path_segment(Input) ->
+    F = first_path_segment(Input, <<>>),
+    split_binary(Input, byte_size(F)).
+%%
+first_path_segment(<<$/,T/binary>>, Acc) ->
+    first_path_segment_end(<<T/binary>>, <<Acc/binary,$/>>);
+first_path_segment(<<C,T/binary>>, Acc) ->
+    first_path_segment_end(<<T/binary>>, <<Acc/binary,C>>).
+
+
+first_path_segment_end(<<>>, Acc) ->
+    Acc;
+first_path_segment_end(<<$/,_/binary>>, Acc) ->
+    Acc;
+first_path_segment_end(<<C,T/binary>>, Acc) ->
+    first_path_segment_end(<<T/binary>>, <<Acc/binary,C>>).
+
+
+remove_last_segment(<<>>) ->
+    <<>>;
+remove_last_segment(B) ->
+    {Init, Last} = split_binary(B, byte_size(B) - 1),
+    case Last of
+        <<$/>> ->
+            Init;
+        _Char ->
+            remove_last_segment(Init)
+    end.
+
+
+%% RFC 3986, 6.2.3.  Scheme-Based Normalization
+normalize_scheme_based(Map) ->
+    Scheme = maps:get(scheme, Map, undefined),
+    Port = maps:get(port, Map, undefined),
+    Path= maps:get(path, Map, undefined),
+    normalize_scheme_based(Map, Scheme, Port, Path).
+%%
+normalize_scheme_based(Map, Scheme, Port, Path)
+  when Scheme =:= "http"; Scheme =:= <<"http">> ->
+    normalize_http(Map, Port, Path);
+normalize_scheme_based(Map, Scheme, Port, Path)
+  when Scheme =:= "https"; Scheme =:= <<"https">> ->
+    normalize_https(Map, Port, Path);
+normalize_scheme_based(Map, Scheme, Port, _Path)
+  when Scheme =:= "ftp"; Scheme =:= <<"ftp">> ->
+    normalize_ftp(Map, Port);
+normalize_scheme_based(Map, Scheme, Port, _Path)
+  when Scheme =:= "ssh"; Scheme =:= <<"ssh">> ->
+    normalize_ssh_sftp(Map, Port);
+normalize_scheme_based(Map, Scheme, Port, _Path)
+  when Scheme =:= "sftp"; Scheme =:= <<"sftp">> ->
+    normalize_ssh_sftp(Map, Port);
+normalize_scheme_based(Map, Scheme, Port, _Path)
+  when Scheme =:= "tftp"; Scheme =:= <<"tftp">> ->
+    normalize_tftp(Map, Port);
+normalize_scheme_based(Map, _, _, _) ->
+    Map.
+
+
+normalize_http(Map, Port, Path) ->
+    M1 = normalize_port(Map, Port, 80),
+    normalize_http_path(M1, Path).
+
+
+normalize_https(Map, Port, Path) ->
+    M1 = normalize_port(Map, Port, 443),
+    normalize_http_path(M1, Path).
+
+
+normalize_ftp(Map, Port) ->
+    normalize_port(Map, Port, 21).
+
+
+normalize_ssh_sftp(Map, Port) ->
+    normalize_port(Map, Port, 22).
+
+
+normalize_tftp(Map, Port) ->
+    normalize_port(Map, Port, 69).
+
+
+normalize_port(Map, Port, Default) ->
+    case Port of
+        Default ->
+            maps:remove(port, Map);
+        _Else ->
+            Map
+    end.
+
+
+normalize_http_path(Map, Path) ->
+    case Path of
+        "" ->
+            Map#{path => "/"};
+        <<>> ->
+            Map#{path => <<"/">>};
+        _Else ->
+            Map
+    end.
diff --git a/lib/stdlib/src/zip.erl b/lib/stdlib/src/zip.erl
index 81f927f399..39be2abff6 100644
--- a/lib/stdlib/src/zip.erl
+++ b/lib/stdlib/src/zip.erl
@@ -457,8 +457,7 @@ do_zip(F, Files, Options) ->
         Out3 = Output({close, F}, Out2),
         {ok, Out3}
     catch
-        C:R ->
-            Stk = erlang:get_stacktrace(),
+        C:R:Stk ->
             zlib:close(Z),
             Output({close, F}, Out0),
             erlang:raise(C, R, Stk)
diff --git a/lib/stdlib/test/Makefile b/lib/stdlib/test/Makefile
index 523cb95065..8490770f3d 100644
--- a/lib/stdlib/test/Makefile
+++ b/lib/stdlib/test/Makefile
@@ -87,6 +87,7 @@ MODULES= \
 	timer_simple_SUITE \
 	unicode_SUITE \
 	unicode_util_SUITE \
+	uri_string_SUITE \
 	win32reg_SUITE \
 	y2k_SUITE \
 	select_SUITE \
diff --git a/lib/stdlib/test/array_SUITE.erl b/lib/stdlib/test/array_SUITE.erl
index 5836f275ba..956582c4fd 100644
--- a/lib/stdlib/test/array_SUITE.erl
+++ b/lib/stdlib/test/array_SUITE.erl
@@ -141,10 +141,10 @@ t(What) ->
 			  io:format("Test ~p ~n",[T]),
 			  try 
 			      ?MODULE:T([])
-			  catch _E:_R ->
+			  catch _E:_R:_S ->
 				  Line = get(test_server_loc),
 				  io:format("Failed ~p:~p ~p ~p~n   ~p~n", 
-					    [T,Line,_E,_R, erlang:get_stacktrace()])
+					    [T,Line,_E,_R,_S])
 			  end
 		  end, What).
 
@@ -161,8 +161,8 @@ extract_tests() ->
 	       end,
 	[Call(Test) || Test <- Tests],
 	io:format("Tests ~p~n", [Tests])
-    catch _:Err ->
-	    io:format("Error: ~p ~p~n", [Err, erlang:get_stacktrace()])
+    catch _:Err:Stacktrace ->
+	    io:format("Error: ~p ~p~n", [Err, Stacktrace])
     end,
     file:close(In),
     file:close(Out).
diff --git a/lib/stdlib/test/base64_SUITE.erl b/lib/stdlib/test/base64_SUITE.erl
index 48b3f5f959..1fc4c3fc0e 100644
--- a/lib/stdlib/test/base64_SUITE.erl
+++ b/lib/stdlib/test/base64_SUITE.erl
@@ -97,10 +97,9 @@ base64_otp_5635(Config) when is_list(Config) ->
     <<"===">> = base64:decode(base64:encode("===")),
     ok.
 %%-------------------------------------------------------------------------
-%% OTP-6279: Guard needed so that function fails in a correct
-%% way for faulty input, i.e. function_clause.
+%% OTP-6279: Make sure illegal characters are rejected when decoding.
 base64_otp_6279(Config) when is_list(Config) ->
-    {'EXIT',{function_clause, _}} = (catch base64:decode("dGVzda==a")),
+    {'EXIT',_} = (catch base64:decode("dGVzda==a")),
     ok.
 %%-------------------------------------------------------------------------
 %% Encode and decode big binaries.
@@ -115,48 +114,61 @@ big(Config) when is_list(Config) ->
 %%-------------------------------------------------------------------------
 %% Make sure illegal characters are rejected when decoding.
 illegal(Config) when is_list(Config) ->
-    {'EXIT',{function_clause, _}} = (catch base64:decode("()")),
+    %% A few samples with different error reasons. Nothing can be
+    %% assumed about the reason for the crash.
+    {'EXIT',_} = (catch base64:decode("()")),
+    {'EXIT',_} = (catch base64:decode(<<19:8,20:8,21:8,22:8>>)),
+    {'EXIT',_} = (catch base64:decode([19,20,21,22])),
+    {'EXIT',_} = (catch base64:decode_to_string(<<19:8,20:8,21:8,22:8>>)),
+    {'EXIT',_} = (catch base64:decode_to_string([19,20,21,22])),
     ok.
 %%-------------------------------------------------------------------------
 %% mime_decode and mime_decode_to_string have different implementations
-%% so test both with the same input separately. Both functions have
-%% the same implementation for binary/string arguments.
+%% so test both with the same input separately.
 %%
 %% Test base64:mime_decode/1.
 mime_decode(Config) when is_list(Config) ->
+    MimeDecode = fun(In) ->
+                         Out = base64:mime_decode(In),
+                         Out = base64:mime_decode(binary_to_list(In))
+                 end,
     %% Test correct padding
-    <<"one">> = base64:mime_decode(<<"b25l">>),
-    <<"on">>  = base64:mime_decode(<<"b24=">>),
-    <<"o">>   = base64:mime_decode(<<"bw==">>),
+    <<"one">> = MimeDecode(<<"b25l">>),
+    <<"on">>  = MimeDecode(<<"b24=">>),
+    <<"o">>   = MimeDecode(<<"bw==">>),
     %% Test 1 extra padding
-    <<"one">> = base64:mime_decode(<<"b25l= =">>),
-    <<"on">>  = base64:mime_decode(<<"b24== =">>),
-    <<"o">>   = base64:mime_decode(<<"bw=== =">>),
+    <<"one">> = MimeDecode(<<"b25l= =">>),
+    <<"on">>  = MimeDecode(<<"b24== =">>),
+    <<"o">>   = MimeDecode(<<"bw=== =">>),
     %% Test 2 extra padding
-    <<"one">> = base64:mime_decode(<<"b25l===">>),
-    <<"on">>  = base64:mime_decode(<<"b24====">>),
-    <<"o">>   = base64:mime_decode(<<"bw=====">>),
+    <<"one">> = MimeDecode(<<"b25l===">>),
+    <<"on">>  = MimeDecode(<<"b24====">>),
+    <<"o">>   = MimeDecode(<<"bw=====">>),
     %% Test misc embedded padding
-    <<"one">> = base64:mime_decode(<<"b2=5l===">>),
-    <<"on">>  = base64:mime_decode(<<"b=24====">>),
-    <<"o">>   = base64:mime_decode(<<"b=w=====">>),
+    <<"one">> = MimeDecode(<<"b2=5l===">>),
+    <<"on">>  = MimeDecode(<<"b=24====">>),
+    <<"o">>   = MimeDecode(<<"b=w=====">>),
     %% Test misc white space and illegals with embedded padding
-    <<"one">> = base64:mime_decode(<<" b~2=\r\n5()l===">>),
-    <<"on">>  = base64:mime_decode(<<"\tb =2\"¤4=¤=   ==">>),
-    <<"o">>   = base64:mime_decode(<<"\nb=w=====">>),
+    <<"one">> = MimeDecode(<<" b~2=\r\n5()l===">>),
+    <<"on">>  = MimeDecode(<<"\tb =2\"¤4=¤=   ==">>),
+    <<"o">>   = MimeDecode(<<"\nb=w=====">>),
     %% Two pads
     <<"Aladdin:open sesame">> =
-	base64:mime_decode("QWxhZGRpbjpvc()GVuIHNlc2FtZQ=="),
+	MimeDecode(<<"QWxhZGRpbjpvc()GVuIHNlc2FtZQ==">>),
     %% One pad to ignore, followed by more text
-    <<"Hello World!!">> = base64:mime_decode(<<"SGVsb)(G8gV29ybGQ=h IQ= =">>),
+    <<"Hello World!!">> = MimeDecode(<<"SGVsb)(G8gV29ybGQ=h IQ= =">>),
     %% No pad
     <<"Aladdin:open sesam">> =
-	base64:mime_decode("QWxhZGRpbjpvcG¤\")(VuIHNlc2Ft"),
+	MimeDecode(<<"QWxhZGRpbjpvcG¤\")(VuIHNlc2Ft">>),
     %% Encoded base 64 strings may be divided by non base 64 chars.
     %% In this cases whitespaces.
     <<"0123456789!@#0^&*();:<>,. []{}">> =
-	base64:mime_decode(
+	MimeDecode(
 	  <<"MDEy MzQ1Njc4 \tOSFAIzBeJ \nio)(oKTs6 PD4sLi \r\nBbXXt9">>),
+    %% Zeroes
+    <<"012">> = MimeDecode(<<"\000M\000D\000E\000y=\000">>),
+    <<"o">>   = MimeDecode(<<"bw==\000">>),
+    <<"o">>   = MimeDecode(<<"bw=\000=">>),
     ok.
 
 %%-------------------------------------------------------------------------
@@ -165,39 +177,48 @@ mime_decode(Config) when is_list(Config) ->
 
 %% Test base64:mime_decode_to_string/1.
 mime_decode_to_string(Config) when is_list(Config) ->
+    MimeDecodeToString =
+        fun(In) ->
+                Out = base64:mime_decode_to_string(In),
+                Out = base64:mime_decode_to_string(binary_to_list(In))
+        end,
     %% Test correct padding
-    "one" = base64:mime_decode_to_string(<<"b25l">>),
-    "on"  = base64:mime_decode_to_string(<<"b24=">>),
-    "o"   = base64:mime_decode_to_string(<<"bw==">>),
+    "one" = MimeDecodeToString(<<"b25l">>),
+    "on"  = MimeDecodeToString(<<"b24=">>),
+    "o"   = MimeDecodeToString(<<"bw==">>),
     %% Test 1 extra padding
-    "one" = base64:mime_decode_to_string(<<"b25l= =">>),
-    "on"  = base64:mime_decode_to_string(<<"b24== =">>),
-    "o"   = base64:mime_decode_to_string(<<"bw=== =">>),
+    "one" = MimeDecodeToString(<<"b25l= =">>),
+    "on"  = MimeDecodeToString(<<"b24== =">>),
+    "o"   = MimeDecodeToString(<<"bw=== =">>),
     %% Test 2 extra padding
-    "one" = base64:mime_decode_to_string(<<"b25l===">>),
-    "on"  = base64:mime_decode_to_string(<<"b24====">>),
-    "o"   = base64:mime_decode_to_string(<<"bw=====">>),
+    "one" = MimeDecodeToString(<<"b25l===">>),
+    "on"  = MimeDecodeToString(<<"b24====">>),
+    "o"   = MimeDecodeToString(<<"bw=====">>),
     %% Test misc embedded padding
-    "one" = base64:mime_decode_to_string(<<"b2=5l===">>),
-    "on"  = base64:mime_decode_to_string(<<"b=24====">>),
-    "o"   = base64:mime_decode_to_string(<<"b=w=====">>),
+    "one" = MimeDecodeToString(<<"b2=5l===">>),
+    "on"  = MimeDecodeToString(<<"b=24====">>),
+    "o"   = MimeDecodeToString(<<"b=w=====">>),
     %% Test misc white space and illegals with embedded padding
-    "one" = base64:mime_decode_to_string(<<" b~2=\r\n5()l===">>),
-    "on"  = base64:mime_decode_to_string(<<"\tb =2\"¤4=¤=   ==">>),
-    "o"   = base64:mime_decode_to_string(<<"\nb=w=====">>),
+    "one" = MimeDecodeToString(<<" b~2=\r\n5()l===">>),
+    "on"  = MimeDecodeToString(<<"\tb =2\"¤4=¤=   ==">>),
+    "o"   = MimeDecodeToString(<<"\nb=w=====">>),
     %% Two pads
     "Aladdin:open sesame" =
-	base64:mime_decode_to_string("QWxhZGRpbjpvc()GVuIHNlc2FtZQ=="),
+	MimeDecodeToString(<<"QWxhZGRpbjpvc()GVuIHNlc2FtZQ==">>),
     %% One pad to ignore, followed by more text
-    "Hello World!!" = base64:mime_decode_to_string(<<"SGVsb)(G8gV29ybGQ=h IQ= =">>),
+    "Hello World!!" = MimeDecodeToString(<<"SGVsb)(G8gV29ybGQ=h IQ= =">>),
     %% No pad
     "Aladdin:open sesam" =
-	base64:mime_decode_to_string("QWxhZGRpbjpvcG¤\")(VuIHNlc2Ft"),
+	MimeDecodeToString(<<"QWxhZGRpbjpvcG¤\")(VuIHNlc2Ft">>),
     %% Encoded base 64 strings may be divided by non base 64 chars.
     %% In this cases whitespaces.
     "0123456789!@#0^&*();:<>,. []{}" =
-	base64:mime_decode_to_string(
+	MimeDecodeToString(
 	  <<"MDEy MzQ1Njc4 \tOSFAIzBeJ \nio)(oKTs6 PD4sLi \r\nBbXXt9">>),
+    %% Zeroes
+    "012" = MimeDecodeToString(<<"\000M\000D\000E\000y=\000">>),
+    "o"   = MimeDecodeToString(<<"bw==\000">>),
+    "o"   = MimeDecodeToString(<<"bw=\000=">>),
     ok.
 
 %%-------------------------------------------------------------------------
diff --git a/lib/stdlib/test/dets_SUITE.erl b/lib/stdlib/test/dets_SUITE.erl
index d667bd82a2..7d82790b82 100644
--- a/lib/stdlib/test/dets_SUITE.erl
+++ b/lib/stdlib/test/dets_SUITE.erl
@@ -3275,16 +3275,16 @@ otp_8856(Config) when is_list(Config) ->
     {ok, _} = dets:open_file(Tab, [{type, bag}, {file, File}]),
     spawn(fun()-> Me ! {1, dets:insert(Tab, [])} end),
     spawn(fun()-> Me ! {2, dets:insert_new(Tab, [])} end),
-    ok = dets:close(Tab),
     receive {1, ok} -> ok end,
     receive {2, true} -> ok end,
+    ok = dets:close(Tab),
     file:delete(File),
 
     {ok, _} = dets:open_file(Tab, [{type, set}, {file, File}]),
     spawn(fun() -> dets:delete(Tab, 0) end),
     spawn(fun() -> Me ! {3, dets:insert_new(Tab, {0,0})} end),
-    ok = dets:close(Tab),
     receive {3, true} -> ok end,
+    ok = dets:close(Tab),
     file:delete(File),
     ok.
 
diff --git a/lib/stdlib/test/epp_SUITE.erl b/lib/stdlib/test/epp_SUITE.erl
index 915f478dfa..9123bf2f28 100644
--- a/lib/stdlib/test/epp_SUITE.erl
+++ b/lib/stdlib/test/epp_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1998-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1998-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -551,8 +551,8 @@ otp_8130(Config) when is_list(Config) ->
              "t() ->  "
              "   L = \"{ 34 , \\\"1\\\\x{AAA}\\\" , \\\"34\\\" , X . a , $\\\\x{AAA} }\", "
              "   R = ?M({34,\"1\\x{aaa}\",\"34\",X.a,$\\x{aaa}}),"
-             "   Lt = erl_scan:string(L, 1, [unicode]),"
-             "   Rt = erl_scan:string(R, 1, [unicode]),"
+             "   Lt = erl_scan:string(L, 1),"
+             "   Rt = erl_scan:string(R, 1),"
              "   Lt = Rt, ok. ">>,
           ok},
 
diff --git a/lib/stdlib/test/erl_eval_SUITE.erl b/lib/stdlib/test/erl_eval_SUITE.erl
index c3ef4eb051..8eb85cab8e 100644
--- a/lib/stdlib/test/erl_eval_SUITE.erl
+++ b/lib/stdlib/test/erl_eval_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1998-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1998-2017. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -41,6 +41,7 @@
          otp_8133/1,
          otp_10622/1,
          otp_13228/1,
+         otp_14826/1,
          funs/1,
 	 try_catch/1,
 	 eval_expr_5/1,
@@ -57,6 +58,7 @@
 
 -export([count_down/2, count_down_fun/0, do_apply/2, 
          local_func/3, local_func_value/2]).
+-export([simple/0]).
 
 -ifdef(STANDALONE).
 -define(config(A,B),config(A,B)).
@@ -83,7 +85,7 @@ all() ->
      pattern_expr, match_bin, guard_3, guard_4, guard_5, lc,
      simple_cases, unary_plus, apply_atom, otp_5269,
      otp_6539, otp_6543, otp_6787, otp_6977, otp_7550,
-     otp_8133, otp_10622, otp_13228,
+     otp_8133, otp_10622, otp_13228, otp_14826,
      funs, try_catch, eval_expr_5, zero_width,
      eep37, eep43].
 
@@ -988,6 +990,173 @@ otp_13228(_Config) ->
     EFH = {value, fun({io, fwrite}, [atom]) -> io_fwrite end},
     {value, worked, []} = parse_and_run("foo(io:fwrite(atom)).", LFH, EFH).
 
+%% OTP-14826: more accurate stacktrace.
+otp_14826(_Config) ->
+    backtrace_check("fun(P) when is_pid(P) -> true end(a).",
+                    function_clause,
+                    [{erl_eval,'-inside-an-interpreted-fun-',[a],[]},
+                     {erl_eval,eval_fun,6},
+                     ?MODULE]),
+    backtrace_check("B.",
+                    {unbound_var, 'B'},
+                    [{erl_eval,expr,2}, ?MODULE]),
+    backtrace_check("B.",
+                    {unbound, 'B'},
+                    [{erl_eval,expr,5}, ?MODULE],
+                    none, none),
+    backtrace_check("1/0.",
+                    badarith,
+                    [{erlang,'/',[1,0],[]},
+                     {erl_eval,do_apply,6}]),
+    backtrace_catch("catch 1/0.",
+                    badarith,
+                    [{erlang,'/',[1,0],[]},
+                     {erl_eval,do_apply,6}]),
+    check(fun() -> catch exit(foo) end,
+          "catch exit(foo).",
+          {'EXIT', foo}),
+    check(fun() -> catch throw(foo) end,
+          "catch throw(foo).",
+          foo),
+    backtrace_check("try 1/0 after foo end.",
+                    badarith,
+                    [{erlang,'/',[1,0],[]},
+                     {erl_eval,do_apply,6}]),
+    backtrace_catch("catch (try 1/0 after foo end).",
+                    badarith,
+                    [{erlang,'/',[1,0],[]},
+                     {erl_eval,do_apply,6}]),
+    backtrace_catch("try catch 1/0 after foo end.",
+                    badarith,
+                    [{erlang,'/',[1,0],[]},
+                     {erl_eval,do_apply,6}]),
+    backtrace_check("try a of b -> bar after foo end.",
+                    {try_clause,a},
+                    [{erl_eval,try_clauses,8}]),
+    check(fun() -> X = try foo:bar() catch A:B:C -> {A,B} end, X end,
+          "try foo:bar() catch A:B:C -> {A,B} end.",
+          {error, undef}),
+    backtrace_check("C = 4, try foo:bar() catch A:B:C -> {A,B,C} end.",
+                    stacktrace_bound,
+                    [{erl_eval,check_stacktrace_vars,2},
+                     {erl_eval,try_clauses,8}],
+                    none, none),
+    backtrace_catch("catch (try a of b -> bar after foo end).",
+                    {try_clause,a},
+                    [{erl_eval,try_clauses,8}]),
+    backtrace_check("try 1/0 catch exit:a -> foo end.",
+                    badarith,
+                    [{erlang,'/',[1,0],[]},
+                     {erl_eval,do_apply,6}]),
+    Es = [{'try',1,[{call,1,{remote,1,{atom,1,foo},{atom,1,bar}},[]}],
+           [],
+           [{clause,1,[{tuple,1,[{var,1,'A'},{var,1,'B'},{atom,1,'C'}]}],
+             [],[{tuple,1,[{var,1,'A'},{var,1,'B'},{atom,1,'C'}]}]}],[]}],
+    try
+        erl_eval:exprs(Es, [], none, none),
+        ct:fail(stacktrace_variable)
+    catch
+        error:{illegal_stacktrace_variable,{atom,1,'C'}}:S ->
+            [{erl_eval,check_stacktrace_vars,2,_},
+             {erl_eval,try_clauses,8,_}|_] = S
+    end,
+    backtrace_check("{1,1} = {A = 1, A = 2}.",
+                    {badmatch, 1},
+                    [erl_eval, {lists,foldl,3}]),
+    backtrace_check("case a of a when foo:bar() -> x end.",
+                    guard_expr,
+                    [{erl_eval,guard0,4}], none, none),
+    backtrace_check("case a of foo() -> ok end.",
+                    {illegal_pattern,{call,1,{atom,1,foo},[]}},
+                    [{erl_eval,match,4}], none, none),
+    backtrace_check("case a of b -> ok end.",
+                    {case_clause,a},
+                    [{erl_eval,case_clauses,6}, ?MODULE]),
+    backtrace_check("if a =:= b -> ok end.",
+                    if_clause,
+                    [{erl_eval,if_clauses,5}, ?MODULE]),
+    backtrace_check("fun A(b) -> ok end(a).",
+                    function_clause,
+                    [{erl_eval,'-inside-an-interpreted-fun-',[a],[]},
+                     {erl_eval,eval_named_fun,8},
+                     ?MODULE]),
+    backtrace_check("[A || A <- a].",
+                    {bad_generator, a},
+                    [{erl_eval,eval_generate,7}, {erl_eval, eval_lc, 6}]),
+    backtrace_check("<< <<A>> || <<A>> <= a>>.",
+                    {bad_generator, a},
+                    [{erl_eval,eval_b_generate,7}, {erl_eval, eval_bc, 6}]),
+    backtrace_check("[A || A <- [1], begin a end].",
+                    {bad_filter, a},
+                    [{erl_eval,eval_filter,6}, {erl_eval, eval_generate, 7}]),
+    fun() ->
+            {'EXIT', {{badarity, {_Fun, []}}, BT}} =
+                (catch parse_and_run("fun(A) -> A end().")),
+            check_backtrace([{erl_eval,do_apply,5}, ?MODULE], BT)
+    end(),
+    fun() ->
+            {'EXIT', {{badarity, {_Fun, []}}, BT}} =
+                (catch parse_and_run("fun F(A) -> A end().")),
+            check_backtrace([{erl_eval,do_apply,5}, ?MODULE], BT)
+    end(),
+    backtrace_check("foo().",
+                    undef,
+                    [{erl_eval,foo,0},{erl_eval,local_func,6}],
+                    none, none),
+    backtrace_check("a orelse false.",
+                    {badarg, a},
+                    [{erl_eval,expr,5}, ?MODULE]),
+    backtrace_check("a andalso false.",
+                    {badarg, a},
+                    [{erl_eval,expr,5}, ?MODULE]),
+    backtrace_check("t = u.",
+                    {badmatch, u},
+                    [{erl_eval,expr,5}, ?MODULE]),
+    backtrace_check("{math,sqrt}(2).",
+                    {badfun, {math,sqrt}},
+                    [{erl_eval,expr,5}, ?MODULE]),
+    backtrace_check("erl_eval_SUITE:simple().",
+                    simple,
+                    [{?MODULE,simple1,0},{?MODULE,simple,0},erl_eval]),
+    Args = [{integer,1,I} || I <- lists:seq(1, 30)],
+    backtrace_check("fun(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,"
+                    "19,20,21,22,23,24,25,26,27,28,29,30) -> a end.",
+                    {argument_limit,
+                     {'fun',1,[{clause,1,Args,[],[{atom,1,a}]}]}},
+                    [{erl_eval,expr,5}, ?MODULE]),
+    backtrace_check("fun F(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,"
+                    "19,20,21,22,23,24,25,26,27,28,29,30) -> a end.",
+                    {argument_limit,
+                     {named_fun,1,'F',[{clause,1,Args,[],[{atom,1,a}]}]}},
+                    [{erl_eval,expr,5}, ?MODULE]),
+    backtrace_check("#r{}.",
+                    {undef_record,r},
+                    [{erl_eval,expr,5}, ?MODULE],
+                    none, none),
+    %% eval_bits
+    backtrace_check("<<100:8/bitstring>>.",
+                    badarg,
+                    [{eval_bits,eval_exp_field1,6},
+                     eval_bits,eval_bits,erl_eval]),
+    backtrace_check("<<100:8/foo>>.",
+                    {undefined_bittype,foo},
+                    [{eval_bits,make_bit_type,3},eval_bits,
+                     eval_bits,erl_eval],
+                    none, none),
+    backtrace_check("B = <<\"foo\">>, <<B/binary-unit:7>>.",
+                    badarg,
+                    [{eval_bits,eval_exp_field1,6},
+                     eval_bits,eval_bits,erl_eval],
+                    none, none),
+    ok.
+
+simple() ->
+    A = simple1(),
+    {A}.
+
+simple1() ->
+    erlang:error(simple).
+
 %% Simple cases, just to cover some code.
 funs(Config) when is_list(Config) ->
     do_funs(none, none),
@@ -1488,6 +1657,43 @@ error_check(String, Result, LFH, EFH) ->
             ct:fail({eval, Other, Result})
     end.
 
+backtrace_check(String, Result, Backtrace) ->
+    case catch parse_and_run(String) of
+        {'EXIT', {Result, BT}} ->
+            check_backtrace(Backtrace, BT);
+        Other ->
+            ct:fail({eval, Other, Result})
+    end.
+
+backtrace_check(String, Result, Backtrace, LFH, EFH) ->
+    case catch parse_and_run(String, LFH, EFH) of
+        {'EXIT', {Result, BT}} ->
+            check_backtrace(Backtrace, BT);
+        Other ->
+            ct:fail({eval, Other, Result})
+    end.
+
+backtrace_catch(String, Result, Backtrace) ->
+    case parse_and_run(String) of
+        {value, {'EXIT', {Result, BT}}, _Bindings} ->
+            check_backtrace(Backtrace, BT);
+        Other ->
+            ct:fail({eval, Other, Result})
+    end.
+
+check_backtrace([B1|Backtrace], [B2|BT]) ->
+    case {B1, B2} of
+        {M, {M,_,_,_}} ->
+            ok;
+        {{M,F,A}, {M,F,A,_}} ->
+            ok;
+        {B, B} ->
+            ok
+    end,
+    check_backtrace(Backtrace, BT);
+check_backtrace([], _) ->
+    ok.
+
 eval_string(String) ->
     {value, Result, _} = parse_and_run(String),
     Result.
@@ -1499,8 +1705,8 @@ parse_and_run(String) ->
 
 parse_and_run(String, LFH, EFH) ->
     {ok,Tokens,_} = erl_scan:string(String),
-    {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
-    erl_eval:expr(Expr, [], LFH, EFH).
+    {ok, Exprs} = erl_parse:parse_exprs(Tokens),
+    erl_eval:exprs(Exprs, [], LFH, EFH).
 
 no_final_dot(S) ->
     case lists:reverse(S) of
diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl
index b76bece07f..e40f5e9a5d 100644
--- a/lib/stdlib/test/erl_lint_SUITE.erl
+++ b/lib/stdlib/test/erl_lint_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1999-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -66,7 +66,8 @@
          otp_11851/1,otp_11879/1,otp_13230/1,
          record_errors/1, otp_11879_cont/1,
          non_latin1_module/1, otp_14323/1,
-         get_stacktrace/1, otp_14285/1, otp_14378/1]).
+         get_stacktrace/1, stacktrace_syntax/1,
+         otp_14285/1, otp_14378/1]).
 
 suite() ->
     [{ct_hooks,[ts_install_cth]},
@@ -87,7 +88,7 @@ all() ->
      maps, maps_type, maps_parallel_match,
      otp_11851, otp_11879, otp_13230,
      record_errors, otp_11879_cont, non_latin1_module, otp_14323,
-     get_stacktrace, otp_14285, otp_14378].
+     get_stacktrace, stacktrace_syntax, otp_14285, otp_14378].
 
 groups() -> 
     [{unused_vars_warn, [],
@@ -3981,8 +3982,9 @@ non_latin1_module(Config) ->
 
 do_non_latin1_module(Mod) ->
     File = atom_to_list(Mod) ++ ".erl",
-    Forms = [{attribute,1,file,{File,1}},
-             {attribute,1,module,Mod},
+    L1 = erl_anno:new(1),
+    Forms = [{attribute,L1,file,{File,1}},
+             {attribute,L1,module,Mod},
              {eof,2}],
     error = compile:forms(Forms),
     {error,_,[]} = compile:forms(Forms, [return]),
@@ -4129,6 +4131,40 @@ get_stacktrace(Config) ->
     run(Config, Ts),
     ok.
 
+stacktrace_syntax(Config) ->
+    Ts = [{guard,
+           <<"t1() ->
+                  try error(foo)
+                  catch _:_:Stk when is_number(Stk) -> ok
+                  end.
+           ">>,
+           [],
+           {errors,[{3,erl_lint,{stacktrace_guard,'Stk'}}],[]}},
+          {bound,
+           <<"t1() ->
+                  Stk = [],
+                  try error(foo)
+                  catch _:_:Stk -> ok
+                  end.
+           ">>,
+           [],
+           {errors,[{4,erl_lint,{stacktrace_bound,'Stk'}}],[]}},
+          {guard_and_bound,
+           <<"t1() ->
+                  Stk = [],
+                  try error(foo)
+                  catch _:_:Stk when is_integer(Stk) -> ok
+                  end.
+           ">>,
+           [],
+           {errors,[{4,erl_lint,{stacktrace_bound,'Stk'}},
+                    {4,erl_lint,{stacktrace_guard,'Stk'}}],[]}}
+         ],
+
+    run(Config, Ts),
+    ok.
+
+
 %% Unicode atoms.
 otp_14285(Config) ->
     %% A small sample of all the errors and warnings in module erl_lint.
diff --git a/lib/stdlib/test/erl_pp_SUITE.erl b/lib/stdlib/test/erl_pp_SUITE.erl
index 808ba9b4c1..dda8d0a12e 100644
--- a/lib/stdlib/test/erl_pp_SUITE.erl
+++ b/lib/stdlib/test/erl_pp_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2006-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -1262,7 +1262,7 @@ parse_forms(Chars) ->
 parse_forms2([], _Cont, _Line, Forms) ->
     lists:reverse(Forms);
 parse_forms2(String, Cont0, Line, Forms) ->
-    case erl_scan:tokens(Cont0, String, Line, [unicode]) of
+    case erl_scan:tokens(Cont0, String, Line) of
         {done, {ok, Tokens, EndLine}, Chars} ->
             {ok, Form} = erl_parse:parse_form(Tokens),
             parse_forms2(Chars, [], EndLine, [Form | Forms]);
@@ -1303,7 +1303,7 @@ parse_and_pp_expr(String, Indent, Options) ->
     erl_pp:expr(parse_expr(StringDot), Indent, Options).
 
 parse_expr(Chars) ->
-    {ok, Tokens, _} = erl_scan:string(Chars, 1, [unicode]),
+    {ok, Tokens, _} = erl_scan:string(Chars, 1),
     {ok, [Expr]} = erl_parse:parse_exprs(Tokens),
     Expr.
 
diff --git a/lib/stdlib/test/error_logger_h_SUITE.erl b/lib/stdlib/test/error_logger_h_SUITE.erl
index 1f2a9fda0b..9dc04f27a1 100644
--- a/lib/stdlib/test/error_logger_h_SUITE.erl
+++ b/lib/stdlib/test/error_logger_h_SUITE.erl
@@ -257,8 +257,7 @@ match_output([Item|T], Lines0, AtNode, Depth) ->
 	Lines ->
 	    match_output(T, Lines, AtNode, Depth)
     catch
-	C:E ->
-	    Stk = erlang:get_stacktrace(),
+	C:E:Stk ->
 	    io:format("ITEM: ~p", [Item]),
 	    io:format("LINES: ~p", [Lines0]),
 	    erlang:raise(C, E, Stk)
diff --git a/lib/stdlib/test/escript_SUITE_data/unicode1 b/lib/stdlib/test/escript_SUITE_data/unicode1
index 351bb785e5..8dc9d450b8 100755
--- a/lib/stdlib/test/escript_SUITE_data/unicode1
+++ b/lib/stdlib/test/escript_SUITE_data/unicode1
@@ -8,7 +8,7 @@ main(_) ->
     _D = erlang:system_flag(backtrace_depth, 0),
     A = <<"\x{aaa}"/utf8>>,
     S = lists:flatten(io_lib:format("~p/~p.", [A, A])),
-    {ok, Ts, _} = erl_scan:string(S, 1, [unicode]),
+    {ok, Ts, _} = erl_scan:string(S, 1),
     {ok, Es} = erl_parse:parse_exprs(Ts),
     B = erl_eval:new_bindings(),
     erl_eval:exprs(Es, B).
diff --git a/lib/stdlib/test/escript_SUITE_data/unicode2 b/lib/stdlib/test/escript_SUITE_data/unicode2
index 495188f6f0..d0195b036c 100755
--- a/lib/stdlib/test/escript_SUITE_data/unicode2
+++ b/lib/stdlib/test/escript_SUITE_data/unicode2
@@ -8,7 +8,7 @@ main(_) ->
     _D = erlang:system_flag(backtrace_depth, 0),
     A = <<"\x{aa}">>,
     S = lists:flatten(io_lib:format("~p/~p.", [A, A])),
-    {ok, Ts, _} = erl_scan:string(S, 1, [unicode]),
+    {ok, Ts, _} = erl_scan:string(S, 1),
     {ok, Es} = erl_parse:parse_exprs(Ts),
     B = erl_eval:new_bindings(),
     erl_eval:exprs(Es, B).
diff --git a/lib/stdlib/test/ets_SUITE.erl b/lib/stdlib/test/ets_SUITE.erl
index 5a5e282998..ec4a16b510 100644
--- a/lib/stdlib/test/ets_SUITE.erl
+++ b/lib/stdlib/test/ets_SUITE.erl
@@ -78,6 +78,7 @@
 -export([ets_all/1]).
 -export([massive_ets_all/1]).
 -export([take/1]).
+-export([whereis_table/1]).
 
 -export([init_per_testcase/2, end_per_testcase/2]).
 %% Convenience for manual testing
@@ -137,7 +138,8 @@ all() ->
      otp_9423,
      ets_all,
      massive_ets_all,
-     take].
+     take,
+     whereis_table].
 
 groups() ->
     [{new, [],
@@ -1682,7 +1684,7 @@ do_random_test() ->
     ets:delete(Set),
     verify_etsmem(EtsMem).
 
-%% Ttest various variants of update_element.
+%% Test various variants of update_element.
 update_element(Config) when is_list(Config) ->
     EtsMem = etsmem(),
     repeat_for_opts(fun update_element_opts/1),
@@ -3647,7 +3649,7 @@ verify_rescheduling_exit(Config, ForEachData, Flags, Fix, NOTabs, NOProcs) ->
 			  XScheds = count_exit_sched(TP),
 			  io:format("~p XScheds=~p~n",
 				    [TP, XScheds]),
-			  true = XScheds >= 5
+			  true = XScheds >= 3
 		  end,
 		  TPs),
     stop_loopers(LPs),
@@ -4099,6 +4101,7 @@ info_do(Opts) ->
     {value, {keypos, 2}} = lists:keysearch(keypos, 1, Res),
     {value, {protection, protected}} =
 	lists:keysearch(protection, 1, Res),
+    {value, {id, Tab}} = lists:keysearch(id, 1, Res),
     true = ets:delete(Tab),
     undefined = ets:info(non_existing_table_xxyy),
     undefined = ets:info(non_existing_table_xxyy,type),
@@ -5892,6 +5895,36 @@ take(Config) when is_list(Config) ->
     ets:delete(T3),
     ok.
 
+whereis_table(Config) when is_list(Config) ->
+    %% Do we return 'undefined' when the named table doesn't exist?
+    undefined = ets:whereis(whereis_test),
+
+    %% Does the tid() refer to the same table as the name?
+    whereis_test = ets:new(whereis_test, [named_table]),
+    Tid = ets:whereis(whereis_test),
+
+    ets:insert(whereis_test, [{hello}, {there}]),
+
+    [[{hello}],[{there}]] = ets:match(whereis_test, '$1'),
+    [[{hello}],[{there}]] = ets:match(Tid, '$1'),
+
+    true = ets:delete_all_objects(Tid),
+
+    [] = ets:match(whereis_test, '$1'),
+    [] = ets:match(Tid, '$1'),
+
+    %% Does the name disappear when deleted through the tid()?
+    true = ets:delete(Tid),
+    undefined = ets:info(whereis_test),
+    {'EXIT',{badarg, _}} = (catch ets:match(whereis_test, '$1')),
+
+    %% Is the old tid() broken when the table is re-created with the same
+    %% name?
+    whereis_test = ets:new(whereis_test, [named_table]),
+    [] = ets:match(whereis_test, '$1'),
+    {'EXIT',{badarg, _}} = (catch ets:match(Tid, '$1')),
+
+    ok.
 
 %%
 %% Utility functions:
@@ -6023,17 +6056,23 @@ etsmem() ->
 	 end},
     {Mem,AllTabs}.
 
-verify_etsmem({MemInfo,AllTabs}) ->
+
+verify_etsmem(MI) ->
     wait_for_test_procs(),
+    verify_etsmem(MI, 1).
+
+verify_etsmem({MemInfo,AllTabs}, Try) ->
     case etsmem() of
 	{MemInfo,_} ->
 	    io:format("Ets mem info: ~p", [MemInfo]),
-	    case MemInfo of
-		{ErlMem,EtsAlloc} when ErlMem == notsup; EtsAlloc == undefined ->
+	    case {MemInfo, Try} of
+		{{ErlMem,EtsAlloc},_} when ErlMem == notsup; EtsAlloc == undefined ->
 		    %% Use 'erl +Mea max' to do more complete memory leak testing.
 		    {comment,"Incomplete or no mem leak testing"};
-		_ ->
-                    ok
+		{_, 1} ->
+                    ok;
+                _ ->
+                    {comment, "Transient memory discrepancy"}
 	    end;
 
 	{MemInfo2, AllTabs2} ->
@@ -6041,7 +6080,15 @@ verify_etsmem({MemInfo,AllTabs}) ->
 	    io:format("Actual:   ~p", [MemInfo2]),
 	    io:format("Changed tables before: ~p\n",[AllTabs -- AllTabs2]),
 	    io:format("Changed tables after: ~p\n", [AllTabs2 -- AllTabs]),
-            ct:fail("Failed memory check")
+            case Try < 2 of
+                true ->
+                    io:format("\nThis discrepancy could be caused by an "
+                              "inconsistent memory \"snapshot\""
+                              "\nTry again...\n", []),
+                    verify_etsmem({MemInfo, AllTabs}, Try+1);
+                false ->
+                    ct:fail("Failed memory check")
+            end
     end.
 
 
@@ -6369,7 +6416,7 @@ very_big_num(0, Result) ->
     Result.
 
 make_port() ->
-    open_port({spawn, "efile"}, [eof]).
+    hd(erlang:ports()).
 
 make_pid() ->
     spawn_link(fun sleeper/0).
diff --git a/lib/stdlib/test/filelib_SUITE.erl b/lib/stdlib/test/filelib_SUITE.erl
index 1236fe45f4..7403d52881 100644
--- a/lib/stdlib/test/filelib_SUITE.erl
+++ b/lib/stdlib/test/filelib_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2005-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2005-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -26,13 +26,15 @@
 	 wildcard_one/1,wildcard_two/1,wildcard_errors/1,
 	 fold_files/1,otp_5960/1,ensure_dir_eexist/1,ensure_dir_symlink/1,
 	 wildcard_symlink/1, is_file_symlink/1, file_props_symlink/1,
-         find_source/1]).
+         find_source/1, find_source_subdir/1]).
 
 -import(lists, [foreach/2]).
 
 -include_lib("common_test/include/ct.hrl").
 -include_lib("kernel/include/file.hrl").
 
+-define(PRIM_FILE, prim_file).
+
 init_per_testcase(_Case, Config) ->
     Config.
 
@@ -47,7 +49,7 @@ all() ->
     [wildcard_one, wildcard_two, wildcard_errors,
      fold_files, otp_5960, ensure_dir_eexist, ensure_dir_symlink,
      wildcard_symlink, is_file_symlink, file_props_symlink,
-     find_source].
+     find_source, find_source_subdir].
 
 groups() -> 
     [].
@@ -446,10 +448,10 @@ wildcard_symlink(Config) when is_list(Config) ->
 						erl_prim_loader)),
 	    ["sub","symlink"] =
 		basenames(Dir, filelib:wildcard(filename:join(Dir, "*"),
-						prim_file)),
+						?PRIM_FILE)),
 	    ["symlink"] =
 		basenames(Dir, filelib:wildcard(filename:join(Dir, "symlink"),
-						prim_file)),
+						?PRIM_FILE)),
 	    ok = file:delete(AFile),
 	    %% The symlink should still be visible even when its target
 	    %% has been deleted.
@@ -465,10 +467,10 @@ wildcard_symlink(Config) when is_list(Config) ->
 						erl_prim_loader)),
 	    ["sub","symlink"] =
 		basenames(Dir, filelib:wildcard(filename:join(Dir, "*"),
-						prim_file)),
+						?PRIM_FILE)),
 	    ["symlink"] =
 		basenames(Dir, filelib:wildcard(filename:join(Dir, "symlink"),
-						prim_file)),
+						?PRIM_FILE)),
 	    ok
     end.
 
@@ -497,17 +499,17 @@ is_file_symlink(Config) ->
 	ok ->
 	    true = filelib:is_dir(DirAlias),
 	    true = filelib:is_dir(DirAlias, erl_prim_loader),
-	    true = filelib:is_dir(DirAlias, prim_file),
+	    true = filelib:is_dir(DirAlias, ?PRIM_FILE),
 	    true = filelib:is_file(DirAlias),
 	    true = filelib:is_file(DirAlias, erl_prim_loader),
-	    true = filelib:is_file(DirAlias, prim_file),
+	    true = filelib:is_file(DirAlias, ?PRIM_FILE),
 	    ok = file:make_symlink(AFile,FileAlias),
 	    true = filelib:is_file(FileAlias),
 	    true = filelib:is_file(FileAlias, erl_prim_loader),
-	    true = filelib:is_file(FileAlias, prim_file),
+	    true = filelib:is_file(FileAlias, ?PRIM_FILE),
 	    true = filelib:is_regular(FileAlias),
 	    true = filelib:is_regular(FileAlias, erl_prim_loader),
-	    true = filelib:is_regular(FileAlias, prim_file),
+	    true = filelib:is_regular(FileAlias, ?PRIM_FILE),
 	    ok
     end.
 
@@ -528,11 +530,11 @@ file_props_symlink(Config) ->
 	    {_,_} = LastMod = filelib:last_modified(AFile),
 	    LastMod = filelib:last_modified(Alias),
 	    LastMod = filelib:last_modified(Alias, erl_prim_loader),
-	    LastMod = filelib:last_modified(Alias, prim_file),
+	    LastMod = filelib:last_modified(Alias, ?PRIM_FILE),
 	    FileSize = filelib:file_size(AFile),
 	    FileSize = filelib:file_size(Alias),
 	    FileSize = filelib:file_size(Alias, erl_prim_loader),
-	    FileSize = filelib:file_size(Alias, prim_file)
+	    FileSize = filelib:file_size(Alias, ?PRIM_FILE)
     end.
 
 find_source(Config) when is_list(Config) ->
@@ -565,16 +567,18 @@ find_source(Config) when is_list(Config) ->
                                               [{".erl",".yrl",[{"",""}]}]),
 
     {ok, ParserErl} = filelib:find_source(code:which(core_parse)),
+    ParserErlName = filename:basename(ParserErl),
+    ParserErlDir = filename:dirname(ParserErl),
     {ok, ParserYrl} = filelib:find_source(ParserErl),
     "lry." ++ _ = lists:reverse(ParserYrl),
-    {ok, ParserYrl} = filelib:find_source(ParserErl,
+    {ok, ParserYrl} = filelib:find_source(ParserErlName, ParserErlDir,
                                            [{".beam",".erl",[{"ebin","src"}]},
                                             {".erl",".yrl",[{"",""}]}]),
 
     %% find_source automatically checks the local directory regardless of rules
     {ok, ParserYrl} = filelib:find_source(ParserErl),
-    {ok, ParserYrl} = filelib:find_source(ParserErl,
-                                          [{".beam",".erl",[{"ebin","src"}]}]),
+    {ok, ParserYrl} = filelib:find_source(ParserErlName, ParserErlDir,
+                                          [{".erl",".yrl",[{"ebin","src"}]}]),
 
     %% find_file does not check the local directory unless in the rules
     ParserYrlName = filename:basename(ParserYrl),
@@ -588,3 +592,24 @@ find_source(Config) when is_list(Config) ->
     {ok, ParserYrl} = filelib:find_file(ParserYrlName, ParserYrlDir),
     {ok, ParserYrl} = filelib:find_file(ParserYrlName, ParserYrlDir, []),
     ok.
+
+find_source_subdir(Config) when is_list(Config) ->
+    BeamFile = code:which(inets), % Located in lib/inets/src/inets_app/
+    BeamName = filename:basename(BeamFile),
+    BeamDir = filename:dirname(BeamFile),
+    SrcName = filename:basename(BeamFile, ".beam") ++ ".erl",
+
+    {ok, SrcFile} = filelib:find_source(BeamName, BeamDir),
+    SrcName = filename:basename(SrcFile),
+
+    {error, not_found} =
+        filelib:find_source(BeamName, BeamDir,
+                            [{".beam",".erl",[{"ebin","src"}]}]),
+    {ok, SrcFile} =
+        filelib:find_source(BeamName, BeamDir,
+                            [{".beam",".erl",
+                              [{"ebin",filename:join("src", "*")}]}]),
+
+    {ok, SrcFile} = filelib:find_file(SrcName, BeamDir),
+
+    ok.
diff --git a/lib/stdlib/test/filename_SUITE.erl b/lib/stdlib/test/filename_SUITE.erl
index fc77593bb8..f284eb1ed6 100644
--- a/lib/stdlib/test/filename_SUITE.erl
+++ b/lib/stdlib/test/filename_SUITE.erl
@@ -107,6 +107,17 @@ absname(Config) when is_list(Config) ->
             [Drive|":/erlang/src"] = filename:absname([Drive|":erlang/src"]),
             "a:/erlang" = filename:absname("a:erlang"),
 
+            "//foo" = filename:absname("//foo"),
+            "//foo/bar" = filename:absname("//foo/bar"),
+            "//foo/\bar" = filename:absname("//foo/\bar"),
+            "//foo/bar/baz" = filename:absname("//foo/bar\\baz"),
+            "//foo/bar/baz" = filename:absname("//foo\\bar/baz"),
+            "//foo" = filename:absname("\\\\foo"),
+            "//foo/bar" = filename:absname("\\\\foo/bar"),
+            "//foo/\bar" = filename:absname("\\\\foo/\bar"),
+            "//foo/bar/baz" = filename:absname("\\\\foo/bar\\baz"),
+            "//foo/bar/baz" = filename:absname("\\\\foo\\bar/baz"),
+
             file:set_cwd(Cwd),
             ok;
         {unix, _} ->
@@ -167,6 +178,23 @@ absname_2(Config) when is_list(Config) ->
                                                       [Drive|":/"]),
             "a:/erlang" = filename:absname("a:erlang", [Drive|":/"]),
 
+            "//foo" = filename:absname("foo","//"),
+            "//foo/bar" = filename:absname("foo/bar", "//"),
+            "//foo/bar" = filename:absname("bar", "//foo"),
+            "//bar" = filename:absname("/bar", "//foo"),
+            "//foo/bar/baz" = filename:absname("bar/baz", "//foo"),
+            "//bar/baz" = filename:absname("//bar/baz", "//foo"),
+            "//\bar" = filename:absname("/\bar", "//foo"),
+            "//foo" = filename:absname("foo","\\\\"),
+            "//foo/bar" = filename:absname("foo/bar", "\\\\"),
+            "//foo/bar" = filename:absname("bar", "\\\\foo"),
+            "//bar" = filename:absname("/bar", "\\\\foo"),
+            "//foo/bar/baz" = filename:absname("bar/baz", "\\\\foo"),
+            "//bar/baz" = filename:absname("\\\\bar/baz", "\\\\foo"),
+            "//\bar" = filename:absname("/\bar", "\\\\foo"),
+            "//bar/baz" = filename:absname("\\\\bar/baz", "//foo"),
+            "//bar/baz" = filename:absname("//bar/baz", "\\\\foo"),
+
             ok;
         _ ->
             "/usr/foo" = filename:absname(foo, "/usr"),
@@ -244,6 +272,18 @@ dirname(Config) when is_list(Config) ->
             "A:usr" = filename:dirname("A:usr/foo.erl"),
             "/usr" = filename:dirname("\\usr\\foo.erl"),
             "/" = filename:dirname("\\usr"),
+            "//foo/bar" = filename:dirname("//foo/bar/baz.erl"),
+            "//foo/\bar" = filename:dirname("//foo/\bar/baz.erl"),
+            "//foo/bar" = filename:dirname("//foo\\bar/baz.erl"),
+            "//foo/bar" = filename:dirname("\\\\foo/bar/baz.erl"),
+            "//foo/\bar" = filename:dirname("\\\\foo/\bar/baz.erl"),
+            "//foo/bar" = filename:dirname("\\\\foo\\bar/baz.erl"),
+            "//foo" = filename:dirname("//foo/baz.erl"),
+            "//foo" = filename:dirname("//foo/\baz.erl"),
+            "//foo" = filename:dirname("//foo\\baz.erl"),
+            "//foo" = filename:dirname("\\\\foo/baz.erl"),
+            "//foo" = filename:dirname("\\\\foo/\baz.erl"),
+            "//foo" = filename:dirname("\\\\foo\\baz.erl"),
             "A:" = filename:dirname("A:");
         _ -> true
     end,
@@ -289,7 +329,6 @@ join(Config) when is_list(Config) ->
     %% join/1 and join/2 (OTP-12158) by using help function
     %% filename_join/2.
     "/" = filename:join(["/"]),
-    "/" = filename:join(["//"]),
     "usr/foo.erl" = filename_join("usr","foo.erl"),
     "/src/foo.erl" = filename_join(usr, "/src/foo.erl"),
     "/src/foo.erl" = filename_join("/src/",'foo.erl'),
@@ -301,7 +340,6 @@ join(Config) when is_list(Config) ->
     "a/b/c/d/e/f/g" = filename_join("a//b/c/", "d//e/f/g"),
     "a/b/c/d/e/f/g" = filename_join("a//b/c", "d//e/f/g"),
     "/d/e/f/g" = filename_join("a//b/c", "/d//e/f/g"),
-    "/d/e/f/g" = filename:join("a//b/c", "//d//e/f/g"),
 
     "foo/bar" = filename_join([$f,$o,$o,$/,[]], "bar"),
 
@@ -332,6 +370,7 @@ join(Config) when is_list(Config) ->
 
     case os:type() of
         {win32, _} ->
+            "//" = filename:join(["//"]),
             "d:/" = filename:join(["D:/"]),
             "d:/" = filename:join(["D:\\"]),
             "d:/abc" = filename_join("D:/", "abc"),
@@ -345,8 +384,35 @@ join(Config) when is_list(Config) ->
             "c:/usr/foo.erl" = filename:join(["A:","C:/usr","foo.erl"]),
             "c:usr/foo.erl" = filename:join(["A:","C:usr","foo.erl"]),
             "d:/foo" = filename:join([$D, $:, $/, []], "foo"),
+            "//" = filename:join("\\\\", ""),
+            "//foo" = filename:join("\\\\", "foo"),
+            "//foo/bar" = filename:join("\\\\", "foo\\\\bar"),
+            "//foo/bar/baz" = filename:join("\\\\foo", "bar\\\\baz"),
+            "//foo/bar/baz" = filename:join("\\\\foo", "bar\\baz"),
+            "//foo/bar/baz" = filename:join("\\\\foo\\bar", baz),
+            "//foo/\bar/baz" = filename:join("\\\\foo/\bar", baz),
+            "//foo/bar/baz" = filename:join("\\\\foo/bar", baz),
+            "//bar/baz" = filename:join("\\\\foo", "\\\\bar\\baz"),
+            "//bar/baz" = filename:join("\\\\foo", "//bar\\baz"),
+            "//bar/baz" = filename:join("\\\\foo", "//bar/baz"),
+            "//bar/baz" = filename:join("\\\\foo", "\\\\bar/baz"),
+            "//d/e/f/g" = filename:join("a//b/c", "//d//e/f/g"),
+            "//" = filename:join("//", ""),
+            "//foo" = filename:join("//", "foo"),
+            "//foo/bar" = filename:join("//", "foo\\\\bar"),
+            "//foo/bar/baz" = filename:join("//foo", "bar\\\\baz"),
+            "//foo/bar/baz" = filename:join("//foo", "bar\\baz"),
+            "//foo/bar/baz" = filename:join("//foo\\bar", baz),
+            "//foo/\bar/baz" = filename:join("//foo/\bar", baz),
+            "//foo/bar/baz" = filename:join("//foo/bar", baz),
+            "//bar/baz" = filename:join("//foo", "\\\\bar\\baz"),
+            "//bar/baz" = filename:join("//foo", "//bar\\baz"),
+            "//bar/baz" = filename:join("//foo", "//bar/baz"),
+            "//bar/baz" = filename:join("//foo", "\\\\bar/baz"),
             ok;
         _ ->
+            "/" = filename:join(["//"]),
+            "/d/e/f/g" = filename:join("a//b/c", "//d//e/f/g"),
             ok
     end.
 
@@ -402,6 +468,16 @@ split(Config) when is_list(Config) ->
                 filename:split("a:\\msdev\\include"),
             ["a:","msdev","include"] =
                 filename:split("a:msdev\\include"),
+            ["//","foo"] =
+                filename:split("\\\\foo"),
+            ["//","foo"] =
+                filename:split("//foo"),
+            ["//","foo","bar"] =
+                filename:split("\\\\foo\\\\bar"),
+            ["//","foo","baz"] =
+                filename:split("\\\\foo\\baz"),
+            ["//","foo","baz"] =
+                filename:split("//foo\\baz"),
             ok;
         _ ->
 	    ok
@@ -630,7 +706,6 @@ extension_bin(Config) when is_list(Config) ->
     
 join_bin(Config) when is_list(Config) ->
     <<"/">> = filename:join([<<"/">>]),
-    <<"/">> = filename:join([<<"//">>]),
     <<"usr/foo.erl">> = filename:join(<<"usr">>,<<"foo.erl">>),
     <<"/src/foo.erl">> = filename:join(usr, <<"/src/foo.erl">>),
     <<"/src/foo.erl">> = filename:join([<<"/src/">>,'foo.erl']),
@@ -642,7 +717,6 @@ join_bin(Config) when is_list(Config) ->
     <<"a/b/c/d/e/f/g">> = filename:join([<<"a//b/c/">>, <<"d//e/f/g">>]),
     <<"a/b/c/d/e/f/g">> = filename:join([<<"a//b/c">>, <<"d//e/f/g">>]),
     <<"/d/e/f/g">> = filename:join([<<"a//b/c">>, <<"/d//e/f/g">>]),
-    <<"/d/e/f/g">> = filename:join([<<"a//b/c">>, <<"//d//e/f/g">>]),
 
     <<"foo/bar">> = filename:join([$f,$o,$o,$/,[]], <<"bar">>),
 
@@ -695,6 +769,7 @@ join_bin(Config) when is_list(Config) ->
 
     case os:type() of
         {win32, _} ->
+            <<"//">> = filename:join([<<"//">>]),
             <<"d:/">> = filename:join([<<"D:/">>]),
             <<"d:/">> = filename:join([<<"D:\\">>]),
             <<"d:/abc">> = filename:join([<<"D:/">>, <<"abc">>]),
@@ -708,8 +783,35 @@ join_bin(Config) when is_list(Config) ->
             <<"c:/usr/foo.erl">> = filename:join([<<"A:">>,<<"C:/usr">>,<<"foo.erl">>]),
             <<"c:usr/foo.erl">> = filename:join([<<"A:">>,<<"C:usr">>,<<"foo.erl">>]),
             <<"d:/foo">> = filename:join([$D, $:, $/, []], <<"foo">>),
+            <<"//">> = filename:join(<<"\\\\">>, <<"">>),
+            <<"//foo">> = filename:join(<<"\\\\">>, <<"foo">>),
+            <<"//foo/bar">> = filename:join(<<"\\\\">>, <<"foo\\\\bar">>),
+            <<"//foo/bar/baz">> = filename:join(<<"\\\\foo">>, <<"bar\\\\baz">>),
+            <<"//bar/baz">> = filename:join(<<"\\\\foo">>, <<"\\\\bar\\baz">>),
+            <<"//foo/bar/baz">> = filename:join(<<"\\\\foo\\bar">>, baz),
+            <<"//foo/\bar/baz">> = filename:join(<<"\\\\foo/\bar">>, baz),
+            <<"//foo/bar/baz">> = filename:join(<<"\\\\foo/bar">>, baz),
+            <<"//bar/baz">> = filename:join(<<"\\\\foo">>, <<"\\\\bar\\baz">>),
+            <<"//bar/baz">> = filename:join(<<"\\\\foo">>, <<"//bar\\baz">>),
+            <<"//bar/baz">> = filename:join(<<"\\\\foo">>, <<"//bar/baz">>),
+            <<"//bar/baz">> = filename:join(<<"\\\\foo">>, <<"\\\\bar/baz">>),
+            <<"//d/e/f/g">> = filename:join([<<"a//b/c">>, <<"//d//e/f/g">>]),
+            <<"//">> = filename:join(<<"//">>, <<"">>),
+            <<"//foo">> = filename:join(<<"//">>, <<"foo">>),
+            <<"//foo/bar">> = filename:join(<<"//">>, <<"foo\\\\bar">>),
+            <<"//foo/bar/baz">> = filename:join(<<"//foo">>, <<"bar\\\\baz">>),
+            <<"//bar/baz">> = filename:join(<<"//foo">>, <<"\\\\bar\\baz">>),
+            <<"//foo/bar/baz">> = filename:join(<<"//foo\\bar">>, baz),
+            <<"//foo/\bar/baz">> = filename:join(<<"//foo/\bar">>, baz),
+            <<"//foo/bar/baz">> = filename:join(<<"//foo/bar">>, baz),
+            <<"//bar/baz">> = filename:join(<<"//foo">>, <<"\\\\bar\\baz">>),
+            <<"//bar/baz">> = filename:join(<<"//foo">>, <<"//bar\\baz">>),
+            <<"//bar/baz">> = filename:join(<<"//foo">>, <<"//bar/baz">>),
+            <<"//bar/baz">> = filename:join(<<"//foo">>, <<"\\\\bar/baz">>),
             ok;
         _ ->
+            <<"/">> = filename:join([<<"//">>]),
+            <<"/d/e/f/g">> = filename:join([<<"a//b/c">>, <<"//d//e/f/g">>]),
             ok
     end.
 
@@ -756,6 +858,16 @@ split_bin(Config) when is_list(Config) ->
                 filename:split(<<"a:\\msdev\\include">>),
             [<<"a:">>,<<"msdev">>,<<"include">>] =
                 filename:split(<<"a:msdev\\include">>),
+            [<<"//">>,<<"foo">>] =
+                filename:split(<<"\\\\foo">>),
+            [<<"//">>,<<"foo">>] =
+                filename:split(<<"//foo">>),
+            [<<"//">>,<<"foo">>,<<"bar">>] =
+                filename:split(<<"\\\\foo\\\\bar">>),
+            [<<"//">>,<<"foo">>,<<"baz">>] =
+                filename:split(<<"\\\\foo\\baz">>),
+            [<<"//">>,<<"foo">>,<<"baz">>] =
+                filename:split(<<"//foo\\baz">>),
             ok;
         _ ->
             ok
diff --git a/lib/stdlib/test/gen_fsm_SUITE.erl b/lib/stdlib/test/gen_fsm_SUITE.erl
index 86cf58566b..41ee3246f5 100644
--- a/lib/stdlib/test/gen_fsm_SUITE.erl
+++ b/lib/stdlib/test/gen_fsm_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -389,7 +389,7 @@ stop10(_Config) ->
     Dir = filename:dirname(code:which(?MODULE)),
     rpc:call(Node,code,add_path,[Dir]),
     {ok, Pid} = rpc:call(Node,gen_fsm,start,[{global,to_stop},?MODULE,[],[]]),
-    global:sync(),
+    ok = global:sync(),
     ok = gen_fsm:stop({global,to_stop}),
     false = rpc:call(Node,erlang,is_process_alive,[Pid]),
     {'EXIT',noproc} = (catch gen_fsm:stop({global,to_stop})),
@@ -1005,7 +1005,7 @@ undef_in_terminate(Config) when is_list(Config) ->
     State = {undef_in_terminate, {?MODULE, terminate}},
     {ok, FSM} = gen_fsm:start(?MODULE, {state_data, State}, []),
     try
-        gen_fsm:stop(FSM),
+        ok = gen_fsm:stop(FSM),
         ct:fail(failed)
     catch
         exit:{undef, [{?MODULE, terminate, _, _}|_]} ->
@@ -1201,7 +1201,7 @@ timeout({timeout,Ref,{timeout,Time}}, {From,Ref}) ->
     Cref = gen_fsm:start_timer(Time, cancel),
     Time4 = Time*4,
     receive after Time4 -> ok end,
-    gen_fsm:cancel_timer(Cref),
+    _= gen_fsm:cancel_timer(Cref),
     {next_state, timeout, {From,Ref2}};
 timeout({timeout,Ref2,ok},{From,Ref2}) ->
     gen_fsm:reply(From, ok),
diff --git a/lib/stdlib/test/gen_server_SUITE.erl b/lib/stdlib/test/gen_server_SUITE.erl
index 2bc220fef2..e29195e895 100644
--- a/lib/stdlib/test/gen_server_SUITE.erl
+++ b/lib/stdlib/test/gen_server_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1996-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -347,7 +347,7 @@ stop10(_Config) ->
     Dir = filename:dirname(code:which(?MODULE)),
     rpc:call(Node,code,add_path,[Dir]),
     {ok, Pid} = rpc:call(Node,gen_server,start,[{global,to_stop},?MODULE,[],[]]),
-    global:sync(),
+    ok = global:sync(),
     ok = gen_server:stop({global,to_stop}),
     false = rpc:call(Node,erlang,is_process_alive,[Pid]),
     {'EXIT',noproc} = (catch gen_server:stop({global,to_stop})),
@@ -509,7 +509,7 @@ start_node(Name) ->
     %% After starting a slave, it takes a little while until global knows
     %% about it, even if nodes() includes it, so we make sure that global
     %% knows about it before registering something on all nodes.
-    global:sync(),
+    ok = global:sync(),
     N.
 
 call_remote1(Config) when is_list(Config) ->
@@ -647,7 +647,7 @@ cast_fast(Config) when is_list(Config) ->
 cast_fast_messup() ->
     %% Register a false node: hopp@hostname
     unregister(erl_epmd),
-    erl_epmd:start_link(),
+    {ok, _} = erl_epmd:start_link(),
     {ok,S} = gen_tcp:listen(0, []),
     {ok,P} = inet:port(S),
     {ok,_Creation} = erl_epmd:register_node(hopp, P),
@@ -1351,7 +1351,7 @@ do_call_with_huge_message_queue() ->
 
     {Time,ok} = tc(fun() -> calls(10000, Pid) end),
 
-    [self() ! {msg,N} || N <- lists:seq(1, 500000)],
+    _ = [self() ! {msg,N} || N <- lists:seq(1, 500000)],
     erlang:garbage_collect(),
     {NewTime,ok} = tc(fun() -> calls(10000, Pid) end),
     io:format("Time for empty message queue: ~p", [Time]),
@@ -1476,7 +1476,7 @@ undef_in_terminate(Config) when is_list(Config) ->
     State = {undef_in_terminate, {oc_server, terminate}},
     {ok, Server} = gen_server:start(?MODULE, {state, State}, []),
     try
-        gen_server:stop(Server),
+        ok = gen_server:stop(Server),
         ct:fail(failed)
     catch
         exit:{undef, [{oc_server, terminate, [], _}|_]} ->
@@ -1674,7 +1674,7 @@ handle_cast({From,delayed_cast,T}, _State) ->
 handle_cast(hibernate_now, _State) ->
     {noreply, [], hibernate};
 handle_cast(hibernate_later, _State) ->
-    timer:send_after(1000,self(),hibernate_now),
+    {ok, _} = timer:send_after(1000,self(),hibernate_now),
     {noreply, []};
 handle_cast({call_undef_fun, Mod, Fun}, State) ->
     Mod:Fun(),
diff --git a/lib/stdlib/test/gen_statem_SUITE.erl b/lib/stdlib/test/gen_statem_SUITE.erl
index 5b9daecfd3..3f48fe1590 100644
--- a/lib/stdlib/test/gen_statem_SUITE.erl
+++ b/lib/stdlib/test/gen_statem_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2016-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2016-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@
 
 -include_lib("common_test/include/ct.hrl").
 
--compile(export_all).
+-compile([export_all, nowarn_export_all]).
 -behaviour(gen_statem).
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -832,9 +832,14 @@ event_types(_Config) ->
 	%% Abusing the internal format of From...
 	#{init =>
 	      fun () ->
-		      {ok, start, undefined}
+		      {ok, start1, undefined,
+		       [{next_event,internal,0}]}
 	      end,
-	  start =>
+	  start1 =>
+	      fun (internal, 0, undefined) ->
+		      {next_state, start2, undefined}
+	      end,
+	  start2 =>
 	      fun ({call,_} = Call, Req, undefined) ->
 		      {next_state, state1, undefined,
 		       [{next_event,internal,1},
@@ -2040,9 +2045,9 @@ handle_event(Type, Event, State, Data) ->
 	Result ->
 	    wrap_result(Result)
     catch
-	throw:Result ->
+	throw:Result:Stacktrace ->
 	    erlang:raise(
-	      throw, wrap_result(Result), erlang:get_stacktrace())
+	      throw, wrap_result(Result), Stacktrace)
     end.
 
 unwrap_state([State]) ->
diff --git a/lib/stdlib/test/io_SUITE.erl b/lib/stdlib/test/io_SUITE.erl
index e2c73371cd..6f4e7ad7e0 100644
--- a/lib/stdlib/test/io_SUITE.erl
+++ b/lib/stdlib/test/io_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -714,7 +714,7 @@ p(Term, D) ->
     rp(Term, 1, 80, D).
 
 p(Term, Col, Ll, D) ->
-    rp(Term, Col, Ll, D, no_fun).
+    rp(Term, Col, Ll, D, none).
 
 rp(Term, Col, Ll, D) ->
     rp(Term, Col, Ll, D, fun rfd/2).
@@ -724,6 +724,8 @@ rp(Term, Col, Ll, D) ->
 rp(Term, Col, Ll, D, RF) ->
     rp(Term, Col, Ll, D, ?MAXCS, RF).
 
+rp(Term, Col, Ll, D, M, none) ->
+    rp(Term, Col, Ll, D, M, fun(_, _) -> no end);
 rp(Term, Col, Ll, D, M, RF) ->
     %% io:format("~n~n*** Col = ~p Ll = ~p D = ~p~n~p~n-->~n", 
     %%           [Col, Ll, D, Term]),
@@ -1903,29 +1905,61 @@ otp_10836(Suite) when is_list(Suite) ->
 
 %% OTP-10755. The 'l' modifier
 otp_10755(Suite) when is_list(Suite) ->
+    %% printing plain ascii characters
     S = "string",
     "\"string\"" = fmt("~p", [S]),
     "[115,116,114,105,110,103]" = fmt("~lp", [S]),
     "\"string\"" = fmt("~P", [S, 2]),
     "[115|...]" = fmt("~lP", [S, 2]),
-    {'EXIT',{badarg,_}} = (catch fmt("~ltp", [S])),
-    {'EXIT',{badarg,_}} = (catch fmt("~tlp", [S])),
-    {'EXIT',{badarg,_}} = (catch fmt("~ltP", [S])),
-    {'EXIT',{badarg,_}} = (catch fmt("~tlP", [S])),
+    %% printing latin1 chars, with and without modifiers
+    T = {[255],list_to_atom([255]),[a,b,c]},
+    "{\"ÿ\",ÿ,[a,b,c]}" = fmt("~p", [T]),
+    "{\"ÿ\",ÿ,[a,b,c]}" = fmt("~tp", [T]),
+    "{[255],ÿ,[a,b,c]}" = fmt("~lp", [T]),
+    "{[255],ÿ,[a,b,c]}" = fmt("~ltp", [T]),
+    "{[255],ÿ,[a,b,c]}" = fmt("~tlp", [T]),
+    "{\"ÿ\",ÿ,...}" = fmt("~P", [T,3]),
+    "{\"ÿ\",ÿ,...}" = fmt("~tP", [T,3]),
+    "{[255],ÿ,...}" = fmt("~lP", [T,3]),
+    "{[255],ÿ,...}" = fmt("~ltP", [T,3]),
+    "{[255],ÿ,...}" = fmt("~tlP", [T,3]),
+    %% printing unicode chars, with and without modifiers
+    U = {[666],list_to_atom([666]),[a,b,c]},
+    "{[666],'\\x{29A}',[a,b,c]}" = fmt("~p", [U]),
+    case io:printable_range() of
+        unicode ->
+            "{\"ʚ\",'ʚ',[a,b,c]}" = fmt("~tp", [U]),
+            "{\"ʚ\",'ʚ',...}" = fmt("~tP", [U,3]);
+        latin1 ->
+            "{[666],'ʚ',[a,b,c]}" = fmt("~tp", [U]),
+            "{[666],'ʚ',...}" = fmt("~tP", [U,3])
+    end,
+    "{[666],'\\x{29A}',[a,b,c]}" = fmt("~lp", [U]),
+    "{[666],'ʚ',[a,b,c]}" = fmt("~ltp", [U]),
+    "{[666],'ʚ',[a,b,c]}" = fmt("~tlp", [U]),
+    "{[666],'\\x{29A}',...}" = fmt("~P", [U,3]),
+    "{[666],'\\x{29A}',...}" = fmt("~lP", [U,3]),
+    "{[666],'ʚ',...}" = fmt("~ltP", [U,3]),
+    "{[666],'ʚ',...}" = fmt("~tlP", [U,3]),
+    %% the compiler should catch uses of ~l with other than pP
     Text =
         "-module(l_mod).\n"
         "-export([t/0]).\n"
         "t() ->\n"
         "    S = \"string\",\n"
-        "    io:format(\"~ltp\", [S]),\n"
-        "    io:format(\"~tlp\", [S]),\n"
-        "    io:format(\"~ltP\", [S, 1]),\n"
-        "    io:format(\"~tlP\", [S, 1]).\n",
+        "    io:format(\"~lw\", [S]),\n"
+        "    io:format(\"~lW\", [S, 1]),\n"
+        "    io:format(\"~ltw\", [S]),\n"
+        "    io:format(\"~tlw\", [S]),\n"
+        "    io:format(\"~ltW\", [S, 1]),\n"
+        "    io:format(\"~tlW\", [S, 1]).\n",
     {ok,l_mod,[{_File,Ws}]} = compile_file("l_mod.erl", Text, Suite),
-    ["format string invalid (invalid control ~lt)",
-     "format string invalid (invalid control ~tl)",
-     "format string invalid (invalid control ~lt)",
-     "format string invalid (invalid control ~tl)"] =
+    ["format string invalid (invalid control ~lw)",
+     "format string invalid (invalid control ~lW)",
+     "format string invalid (invalid control ~ltw)",
+     "format string invalid (invalid control ~ltw)",
+     "format string invalid (invalid control ~ltW)",
+     "format string invalid (invalid control ~ltW)"] =
         [lists:flatten(M:format_error(E)) || {_L,M,E} <- Ws],
     ok.
 
@@ -2003,6 +2037,7 @@ writes(N, F1) ->
 
 format_string(_Config) ->
     %% All but padding is tested by fmt/2.
+    "xxxxxxxsss" = fmt("~10..xs", ["sss"]),
     "xxxxxxsssx" = fmt("~10.4.xs", ["sss"]),
     "xxxxxxsssx" = fmt("~10.4.*s", [$x, "sss"]),
     ok.
@@ -2138,8 +2173,8 @@ otp_14175(_Config) ->
     "#{}" = p(#{}, 1),
     "#{...}" = p(#{a => 1}, 1),
     "#{#{} => a}" = p(#{#{} => a}, 2),
-    "#{a => 1,...}" = p(#{a => 1, b => 2}, 2),
-    "#{a => 1,b => 2}" = p(#{a => 1, b => 2}, -1),
+    mt("#{a => 1,...}", p(#{a => 1, b => 2}, 2)),
+    mt("#{a => 1,b => 2}", p(#{a => 1, b => 2}, -1)),
 
     M = #{kaaaaaaaaaaaaaaaaaaa => v1,kbbbbbbbbbbbbbbbbbbb => v2,
           kccccccccccccccccccc => v3,kddddddddddddddddddd => v4,
@@ -2382,19 +2417,36 @@ limit_term(_Config) ->
     {_, 2} = limt({a,b,c,[d,e]}, 2),
     {_, 2} = limt({a,b,c,[d,e]}, 3),
     {_, 2} = limt({a,b,c,[d,e]}, 4),
+    T0 = [1|{a,b,c}],
+    {_, 2} = limt(T0, 2),
+    {_, 2} = limt(T0, 3),
+    {_, 2} = limt(T0, 4),
     {_, 1} = limt(<<"foo">>, 18),
+    {_, 2} = limt({"",[1,2]}, 3),
+    {_, 2} = limt({"",{1,2}}, 3),
+    true = limt_pp({"123456789012345678901234567890",{1,2}}, 3),
     ok = blimt(<<"123456789012345678901234567890">>),
+    true = limt_pp(<<"123456789012345678901234567890">>, 3),
+    {_, 2} = limt({<<"kljlkjsl">>,[1,2,3,4]}, 4),
     {_, 1} = limt(<<7:3>>, 2),
     {_, 1} = limt(<<7:21>>, 2),
     {_, 1} = limt([], 2),
     {_, 1} = limt({}, 2),
+    {_, 1} = limt({"", ""}, 4),
     {_, 1} = limt(#{}, 2),
-    {_, 1} = limt(#{[] => {}}, 2),
+    {_, 2} = limt(#{[] => {}}, 1),
+    {_, 2} = limt(#{[] => {}}, 2),
     {_, 1} = limt(#{[] => {}}, 3),
     T = #{[] => {},[a] => [b]},
-    {_, 1} = limt(T, 2),
+    {_, 1} = limt(T, 0),
+    {_, 2} = limt(T, 1),
+    {_, 2} = limt(T, 2),
     {_, 1} = limt(T, 3),
     {_, 1} = limt(T, 4),
+    T2 = #{[] => {},{} => []},
+    {_, 2} = limt(T2, 1),
+    {_, 2} = limt(T2, 2),
+    {_, 1} = limt(T2, 3),
     ok.
 
 blimt(Binary) ->
@@ -2428,3 +2480,12 @@ limt(Term, Depth) when is_integer(Depth) ->
 
 form(Term, Depth) ->
     lists:flatten(io_lib:format("~W", [Term, Depth])).
+
+limt_pp(Term, Depth) when is_integer(Depth) ->
+    T1 = io_lib:limit_term(Term, Depth),
+    S = pp(Term, Depth),
+    S1 = pp(T1, Depth),
+    S1 =:= S.
+
+pp(Term, Depth) ->
+    lists:flatten(io_lib:format("~P", [Term, Depth])).
diff --git a/lib/stdlib/test/lists_SUITE.erl b/lib/stdlib/test/lists_SUITE.erl
index 7c99244b36..837ab4e97e 100644
--- a/lib/stdlib/test/lists_SUITE.erl
+++ b/lib/stdlib/test/lists_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2017. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -57,7 +57,7 @@
 	 filter_partition/1, 
 	 join/1,
 	 otp_5939/1, otp_6023/1, otp_6606/1, otp_7230/1,
-	 suffix/1, subtract/1, droplast/1, hof/1]).
+	 suffix/1, subtract/1, droplast/1, search/1, hof/1]).
 
 %% Sort randomized lists until stopped.
 %%
@@ -121,7 +121,7 @@ groups() ->
      {zip, [parallel], [zip_unzip, zip_unzip3, zipwith, zipwith3]},
      {misc, [parallel], [reverse, member, dropwhile, takewhile,
 			 filter_partition, suffix, subtract, join,
-			 hof, droplast]}
+			 hof, droplast, search]}
     ].
 
 init_per_suite(Config) ->
@@ -2615,6 +2615,20 @@ droplast(Config) when is_list(Config) ->
 
     ok.
 
+%% Test lists:search/2
+search(Config) when is_list(Config) ->
+    F = fun(I) -> I rem 2 =:= 0 end,
+    F2 = fun(A, B) -> A > B end,
+
+    {value, 2} = lists:search(F, [1,2,3,4]),
+    false = lists:search(F, [1,3,5,7]),
+    false = lists:search(F, []),
+
+    %% Error cases.
+    {'EXIT',{function_clause,_}} = (catch lists:search(badfun, [])),
+    {'EXIT',{function_clause,_}} = (catch lists:search(F2, [])),
+    ok.
+
 %% Briefly test the common high-order functions to ensure they
 %% are covered.
 hof(Config) when is_list(Config) ->
diff --git a/lib/stdlib/test/maps_SUITE.erl b/lib/stdlib/test/maps_SUITE.erl
index 42e669a799..a75751b31d 100644
--- a/lib/stdlib/test/maps_SUITE.erl
+++ b/lib/stdlib/test/maps_SUITE.erl
@@ -30,6 +30,7 @@
 -export([t_update_with_3/1, t_update_with_4/1,
          t_get_3/1, t_filter_2/1,
          t_fold_3/1,t_map_2/1,t_size_1/1,
+         t_iterator_1/1,
          t_with_2/1,t_without_2/1]).
 
 %%-define(badmap(V,F,Args), {'EXIT', {{badmap,V}, [{maps,F,Args,_}|_]}}).
@@ -47,6 +48,7 @@ all() ->
     [t_update_with_3,t_update_with_4,
      t_get_3,t_filter_2,
      t_fold_3,t_map_2,t_size_1,
+     t_iterator_1,
      t_with_2,t_without_2].
 
 t_update_with_3(Config) when is_list(Config) ->
@@ -127,6 +129,8 @@ t_filter_2(Config) when is_list(Config) ->
     Pred2 = fun(K,V) -> is_list(K) andalso (V rem 2) =:= 0 end,
     #{a := 2,c := 4} = maps:filter(Pred1,M),
     #{"b" := 2,"c" := 4} = maps:filter(Pred2,M),
+    #{a := 2,c := 4} = maps:filter(Pred1,maps:iterator(M)),
+    #{"b" := 2,"c" := 4} = maps:filter(Pred2,maps:iterator(M)),
     %% error case
     ?badmap(a,filter,[_,a]) = (catch maps:filter(fun(_,_) -> ok end,id(a))),
     ?badarg(filter,[<<>>,#{}]) = (catch maps:filter(id(<<>>),#{})),
@@ -139,6 +143,8 @@ t_fold_3(Config) when is_list(Config) ->
     Tot0 = lists:sum(Vs),
     Tot1 = maps:fold(fun({k,_},V,A) -> A + V end, 0, M0),
     true = Tot0 =:= Tot1,
+    Tot2 = maps:fold(fun({k,_},V,A) -> A + V end, 0, maps:iterator(M0)),
+    true = Tot0 =:= Tot2,
 
     %% error case
     ?badmap(a,fold,[_,0,a]) = (catch maps:fold(fun(_,_,_) -> ok end,0,id(a))),
@@ -151,12 +157,48 @@ t_map_2(Config) when is_list(Config) ->
     #{ {k,1} := 1, {k,200} := 200} = M0,
     M1 = maps:map(fun({k,_},V) -> V + 42 end, M0),
     #{ {k,1} := 43, {k,200} := 242} = M1,
+    M2 = maps:map(fun({k,_},V) -> V + 42 end, maps:iterator(M0)),
+    #{ {k,1} := 43, {k,200} := 242} = M2,
 
     %% error case
     ?badmap(a,map,[_,a]) = (catch maps:map(fun(_,_) -> ok end, id(a))),
     ?badarg(map,[<<>>,#{}]) = (catch maps:map(id(<<>>),#{})),
     ok.
 
+t_iterator_1(Config) when is_list(Config) ->
+
+    %% Small map test
+    M0 = #{ a => 1, b => 2 },
+    I0 = maps:iterator(M0),
+    {K1,V1,I1} = maps:next(I0),
+    {K2,V2,I2} = maps:next(I1),
+    none = maps:next(I2),
+
+    KVList = lists:sort([{K1,V1},{K2,V2}]),
+    KVList = lists:sort(maps:to_list(M0)),
+
+    %% Large map test
+
+    Vs2 = lists:seq(1,200),
+    M2 = maps:from_list([{{k,I},I}||I<-Vs2]),
+    KVList2 = lists:sort(iter_kv(maps:iterator(M2))),
+    KVList2 = lists:sort(maps:to_list(M2)),
+
+    %% Larger map test
+
+    Vs3 = lists:seq(1,10000),
+    M3 = maps:from_list([{{k,I},I}||I<-Vs3]),
+    KVList3 = lists:sort(iter_kv(maps:iterator(M3))),
+    KVList3 = lists:sort(maps:to_list(M3)),
+    ok.
+
+iter_kv(I) ->
+    case maps:next(I) of
+        none ->
+            [];
+        {K,V,NI} ->
+            [{K,V} | iter_kv(NI)]
+    end.
 
 t_size_1(Config) when is_list(Config) ->
       0 = maps:size(#{}),
diff --git a/lib/stdlib/test/proc_lib_SUITE.erl b/lib/stdlib/test/proc_lib_SUITE.erl
index 7686889360..fbdcb518b2 100644
--- a/lib/stdlib/test/proc_lib_SUITE.erl
+++ b/lib/stdlib/test/proc_lib_SUITE.erl
@@ -446,8 +446,8 @@ init_dont_hang(Config) when is_list(Config) ->
 	StartLinkRes = proc_lib:start(?MODULE, init_dont_hang_init, [self()], 1000),
 	StartLinkRes = proc_lib:start(?MODULE, init_dont_hang_init, [self()], 1000, []),
 	ok
-    catch _:Error ->
-	    io:format("Error ~p /= ~p ~n",[erlang:get_stacktrace(), StartLinkRes]),
+    catch _:Error:Stacktrace ->
+	    io:format("Error ~p /= ~p ~n",[Stacktrace, StartLinkRes]),
 	    exit(Error)
     end.
 
diff --git a/lib/stdlib/test/property_test/README b/lib/stdlib/test/property_test/README
new file mode 100644
index 0000000000..57602bf719
--- /dev/null
+++ b/lib/stdlib/test/property_test/README
@@ -0,0 +1,12 @@
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%                                                             %%%
+%%%                       WARNING                               %%%
+%%%                                                             %%%
+%%% This is experimental code which may be changed or removed   %%%
+%%%               anytime without any warning.                  %%%
+%%%                                                             %%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+The test in this directory are written assuming that the user has a QuickCheck license.  They are to be run manually.  Some may be possible to be run with other tools, e.g. PropEr.
+
diff --git a/lib/stdlib/test/property_test/uri_string_recompose.erl b/lib/stdlib/test/property_test/uri_string_recompose.erl
new file mode 100644
index 0000000000..e51a671172
--- /dev/null
+++ b/lib/stdlib/test/property_test/uri_string_recompose.erl
@@ -0,0 +1,361 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(uri_string_recompose).
+
+-compile(export_all).
+
+-proptest(eqc).
+-proptest([triq,proper]).
+
+-ifndef(EQC).
+-ifndef(PROPER).
+-ifndef(TRIQ).
+-define(EQC,true).
+-endif.
+-endif.
+-endif.
+
+-ifdef(EQC).
+-include_lib("eqc/include/eqc.hrl").
+-define(MOD_eqc,eqc).
+
+-else.
+-ifdef(PROPER).
+-include_lib("proper/include/proper.hrl").
+-define(MOD_eqc,proper).
+
+-else.
+-ifdef(TRIQ).
+-define(MOD_eqc,triq).
+-include_lib("triq/include/triq.hrl").
+
+-endif.
+-endif.
+-endif.
+
+
+-define(STRING_REST(MatchStr, Rest), <<MatchStr/utf8, Rest/binary>>).
+
+-define(SCHEME, {scheme, scheme()}).
+-define(USER, {userinfo, unicode()}).
+-define(HOST, {host, host_map()}).
+-define(PORT, {port, port()}).
+-define(PATH_ABE, {path, path_abempty_map()}).
+-define(PATH_ABS, {path, path_absolute_map()}).
+-define(PATH_NOS, {path, path_noscheme_map()}).
+-define(PATH_ROO, {path, path_rootless_map()}).
+-define(PATH_EMP, {path, path_empty_map()}).
+-define(QUERY, {query, query_map()}).
+-define(FRAGMENT, {fragment, fragment_map()}).
+
+
+%%%========================================================================
+%%% Properties
+%%%========================================================================
+
+prop_recompose() ->
+    ?FORALL(Map, map(),
+            Map =:= uri_string:parse(uri_string:recompose(Map))
+           ).
+
+%% Stats
+prop_map_key_length_collect() ->
+    ?FORALL(List, map(),
+            collect(length(maps:keys(List)), true)).
+
+prop_map_collect() ->
+    ?FORALL(List, map(),
+            collect(lists:sort(maps:keys(List)), true)).
+
+prop_scheme_collect() ->
+    ?FORALL(List, scheme(),
+            collect(length(List), true)).
+
+
+%%%========================================================================
+%%% Generators
+%%%========================================================================
+
+map() ->
+    ?LET(Gen, comp_proplist(), proplist_to_map(Gen)).
+
+comp_proplist() ->
+    frequency([
+               {2, [?SCHEME,?PATH_ABS]},
+               {2, [?SCHEME,?PATH_ROO]},
+               {2, [?SCHEME,?PATH_EMP]},
+               {2, [?SCHEME,?HOST,?PATH_ABE]},
+               {2, [?SCHEME,?USER,?HOST,?PATH_ABE]},
+               {2, [?SCHEME,?HOST,?PORT,?PATH_ABE]},
+               {2, [?SCHEME,?USER,?HOST,?PORT,?PATH_ABE]},
+
+               {2, [?PATH_ABS]},
+               {2, [?PATH_NOS]},
+               {2, [?PATH_EMP]},
+               {2, [?HOST,?PATH_ABE]},
+               {2, [?USER,?HOST,?PATH_ABE]},
+               {2, [?HOST,?PORT,?PATH_ABE]},
+               {2, [?USER,?HOST,?PORT,?PATH_ABE]},
+
+
+               {2, [?SCHEME,?PATH_ABS,?QUERY]},
+               {2, [?SCHEME,?PATH_ROO,?QUERY]},
+               {2, [?SCHEME,?PATH_EMP,?QUERY]},
+               {2, [?SCHEME,?HOST,?PATH_ABE,?QUERY]},
+               {2, [?SCHEME,?USER,?HOST,?PATH_ABE,?QUERY]},
+               {2, [?SCHEME,?HOST,?PORT,?PATH_ABE,?QUERY]},
+               {2, [?SCHEME,?USER,?HOST,?PORT,?PATH_ABE,?QUERY]},
+
+               {2, [?PATH_ABS,?QUERY]},
+               {2, [?PATH_NOS,?QUERY]},
+               {2, [?PATH_EMP,?QUERY]},
+               {2, [?HOST,?PATH_ABE,?QUERY]},
+               {2, [?USER,?HOST,?PATH_ABE,?QUERY]},
+               {2, [?HOST,?PORT,?PATH_ABE,?QUERY]},
+               {2, [?USER,?HOST,?PORT,?PATH_ABE,?QUERY]},
+
+
+               {2, [?SCHEME,?PATH_ABS,?FRAGMENT]},
+               {2, [?SCHEME,?PATH_ROO,?FRAGMENT]},
+               {2, [?SCHEME,?PATH_EMP,?FRAGMENT]},
+               {2, [?SCHEME,?HOST,?PATH_ABE,?FRAGMENT]},
+               {2, [?SCHEME,?USER,?HOST,?PATH_ABE,?FRAGMENT]},
+               {2, [?SCHEME,?HOST,?PORT,?PATH_ABE,?FRAGMENT]},
+               {2, [?SCHEME,?USER,?HOST,?PORT,?PATH_ABE,?FRAGMENT]},
+
+               {2, [?PATH_ABS,?FRAGMENT]},
+               {2, [?PATH_NOS,?FRAGMENT]},
+               {2, [?PATH_EMP,?FRAGMENT]},
+               {2, [?HOST,?PATH_ABE,?FRAGMENT]},
+               {2, [?USER,?HOST,?PATH_ABE,?FRAGMENT]},
+               {2, [?HOST,?PORT,?PATH_ABE,?FRAGMENT]},
+               {2, [?USER,?HOST,?PORT,?PATH_ABE,?FRAGMENT]},
+
+
+               {2, [?SCHEME,?PATH_ABS,?QUERY,?FRAGMENT]},
+               {2, [?SCHEME,?PATH_ROO,?QUERY,?FRAGMENT]},
+               {2, [?SCHEME,?PATH_EMP,?QUERY,?FRAGMENT]},
+               {2, [?SCHEME,?HOST,?PATH_ABE,?QUERY,?FRAGMENT]},
+               {2, [?SCHEME,?USER,?HOST,?PATH_ABE,?QUERY,?FRAGMENT]},
+               {2, [?SCHEME,?HOST,?PORT,?PATH_ABE,?QUERY,?FRAGMENT]},
+               {2, [?SCHEME,?USER,?HOST,?PORT,?PATH_ABE,?QUERY,?FRAGMENT]},
+
+               {2, [?PATH_ABS,?QUERY,?FRAGMENT]},
+               {2, [?PATH_NOS,?QUERY,?FRAGMENT]},
+               {2, [?PATH_EMP,?QUERY,?FRAGMENT]},
+               {2, [?HOST,?PATH_ABE,?QUERY,?FRAGMENT]},
+               {2, [?USER,?HOST,?PATH_ABE,?QUERY,?FRAGMENT]},
+               {2, [?HOST,?PORT,?PATH_ABE,?QUERY,?FRAGMENT]},
+               {2, [?USER,?HOST,?PORT,?PATH_ABE,?QUERY,?FRAGMENT]}
+              ]).
+
+
+%%-------------------------------------------------------------------------
+%% Path
+%%-------------------------------------------------------------------------
+path_abempty_map() ->
+    frequency([{90, path_abe_map()},
+               {10, path_empty_map()}]).
+
+path_abe_map() ->
+    ?SIZED(Length, path_abe_map(Length, [])).
+%%
+path_abe_map(0, Segments) ->
+    ?LET(Gen, Segments, lists:append(Gen));
+path_abe_map(N, Segments) ->
+    path_abe_map(N-1, [slash(),segment()|Segments]).
+
+
+path_absolute_map() ->
+    ?SIZED(Length, path_absolute_map(Length, [])).
+%%
+path_absolute_map(0, Segments) ->
+    ?LET(Gen, [slash(),segment_nz()|Segments], lists:append(Gen));
+path_absolute_map(N, Segments) ->
+    path_absolute_map(N-1, [slash(),segment()|Segments]).
+
+
+path_noscheme_map() ->
+    ?SIZED(Length, path_noscheme_map(Length, [])).
+%%
+path_noscheme_map(0, Segments) ->
+    ?LET(Gen, [segment_nz_nc()|Segments], lists:append(Gen));
+path_noscheme_map(N, Segments) ->
+    path_noscheme_map(N-1, [slash(),segment()|Segments]).
+
+path_rootless_map() ->
+    ?SIZED(Length, path_rootless_map(Length, [])).
+%%
+path_rootless_map(0, Segments) ->
+    ?LET(Gen, [segment_nz()|Segments], lists:append(Gen));
+path_rootless_map(N, Segments) ->
+    path_rootless_map(N-1, [slash(),segment()|Segments]).
+
+
+segment_nz() ->
+    non_empty(segment()).
+
+segment_nz_nc() ->
+    non_empty(list(frequency([{30, unreserved()},
+                              {10, sub_delims()},
+                              {10, unicode_char()},
+                              {5, oneof([$@])}
+                             ]))).
+
+
+segment() ->
+    list(frequency([{30, unreserved()},
+                    {10, sub_delims()},
+                    {10, unicode_char()},
+                    {5, oneof([$:, $@])}
+                   ])).
+
+slash() ->
+    "/".
+
+path_empty_map() ->
+    "".
+
+
+%%-------------------------------------------------------------------------
+%% Path
+%%-------------------------------------------------------------------------
+host_map() ->
+    frequency([{30, reg_name()},
+               {30, ip_address()}
+              ]).
+
+
+reg_name() ->
+    list(frequency([{30, alpha()},
+                              {10, sub_delims()},
+                              {10, unicode_char()}
+                             ])).
+
+ip_address() ->
+    oneof(["127.0.0.1", "::127.0.0.1",
+           "2001:0db8:0000:0000:0000:0000:1428:07ab",
+           "2001:0db8:0000:0000:0000::1428:07ab",
+           "2001:0db8:0:0:0:0:1428:07ab",
+           "2001:0db8:0::0:1428:07ab"]).
+
+%% Generating only reg-names
+host_uri() ->
+    non_empty(list(frequency([{30, unreserved()},
+                              {10, sub_delims()},
+                              {10, pct_encoded()}
+                             ]))).
+
+%%-------------------------------------------------------------------------
+%% Port, Query, Fragment
+%%-------------------------------------------------------------------------
+port() ->
+    frequency([{10, undefined},
+               {10, range(1,65535)}
+              ]).
+
+query_map() ->
+    unicode().
+
+
+query_uri() ->
+    [$?| non_empty(list(frequency([{20, pchar()},
+                                   {5, oneof([$/, $?])} % punctuation
+                                  ])))].
+
+fragment_map() ->
+    unicode().
+
+fragment_uri() ->
+    [$?| non_empty(list(frequency([{20, pchar()},
+                                   {5, oneof([$/, $?])} % punctuation
+                                  ])))].
+
+
+%%-------------------------------------------------------------------------
+%% Scheme
+%%-------------------------------------------------------------------------
+scheme() ->
+    ?SIZED(Length, scheme_start(Length, [])).
+%%
+scheme_start(0, L) ->
+    ?LET(Gen, L, lists:reverse(Gen));
+scheme_start(N, L) ->
+    scheme(N-1,[alpha()|L]).
+
+scheme(0, L) ->
+    ?LET(Gen, L, lists:reverse(Gen));
+scheme(N, L) ->
+    scheme(N-1, [scheme_char()|L]).
+
+
+%%-------------------------------------------------------------------------
+%% Misc
+%%-------------------------------------------------------------------------
+unicode() ->
+    list(frequency([{20, alpha()},                    % alpha
+               {10, digit()},                    % digit
+               {10, unicode_char()}              % unicode
+              ])).
+
+scheme_char() ->
+    frequency([{20, alpha()},                    % alpha
+               {20, digit()},                    % digit
+               {5, oneof([$+, $-, $.])}          % punctuation
+              ]).
+
+sub_delims() ->
+    oneof([$!, $$, $&, $', $(, $),
+           $*, $+, $,,$;, $=]).
+
+pchar() ->
+    frequency([{20, unreserved()},
+               {5, pct_encoded()},
+               {5, sub_delims()},
+               {1, oneof([$:, $@])}              % punctuation
+              ]).
+
+unreserved() ->
+    frequency([{20, alpha()},
+               {5, digit()},
+               {1, oneof([$-, $., $_, $~])}      % punctuation
+              ]).
+
+unicode_char() ->
+    range(913, 1023).
+
+alpha() ->
+    frequency([{20, range($a, $z)},              % letters
+               {20, range($A, $Z)}]).            % letters
+
+digit() ->
+    range($0, $9).                               % numbers
+
+pct_encoded() ->
+    oneof(["%C3%A4", "%C3%A5", "%C3%B6"]).
+
+
+%%%========================================================================
+%%% Helpers
+%%%========================================================================
+proplist_to_map(L) ->
+    lists:foldl(fun({K,V},M) -> M#{K => V};
+                  (_,M) -> M
+               end, #{}, L).
diff --git a/lib/stdlib/test/qlc_SUITE.erl b/lib/stdlib/test/qlc_SUITE.erl
index 5e9e03e410..8f8a0f6e73 100644
--- a/lib/stdlib/test/qlc_SUITE.erl
+++ b/lib/stdlib/test/qlc_SUITE.erl
@@ -1695,28 +1695,7 @@ sort(Config) when is_list(Config) ->
           [true || I <- lists:seq(1, 50000), not ets:insert(E, {I, I})],
           H = qlc:q([{X,Y} || X <- [a,b], Y <- qlc:sort(ets:table(E))]),
           100000 = length(qlc:e(H)),
-          ets:delete(E)">>,
-
-       begin
-       TmpDir = ?privdir,
-       [<<"TE = process_flag(trap_exit, true),
-           E = ets:new(foo, []),
-           [true || I <- lists:seq(1, 50000), not ets:insert(E, {I, I})],
-           Ports = erlang:ports(),
-           H = qlc:q([{X,Y} || X <- [a,b], 
-                               begin
-                                   [P] = erlang:ports() -- Ports,
-                                   exit(P, port_exit),
-                                   true
-                               end,
-                               Y <- qlc:sort(ets:table(E),
-                                             [{tmpdir,\"">>, 
-                                               TmpDir, <<"\"}])]),
-           {error, qlc, {file_error, _, _}} = (catch qlc:e(H)),
-           receive {'EXIT', _, port_exit} -> ok end,
-           ets:delete(E),
-           process_flag(trap_exit, TE)">>]
-       end
+          ets:delete(E)">>
 
         ],
     run(Config, Ts),
@@ -7871,7 +7850,7 @@ run_test(Config, Extra, {cres, Body, Opts, ExpectedCompileReturn}) ->
     {module, _} = code:load_abs(AbsFile, Mod),
 
     Ms0 = erlang:process_info(self(),messages),
-    Before = {{get(), lists:sort(ets:all()), Ms0}, pps()},
+    Before = {{lget(), lists:sort(ets:all()), Ms0}, pps()},
 
     %% Prepare the check that the qlc module does not call qlc_pt.
     _ = [unload_pt() || {file, Name} <- [code:is_loaded(qlc_pt)], 
@@ -7903,7 +7882,7 @@ run_test(Config, Extra, Body) ->
 
 wait_for_expected(R, {Strict0,PPS0}=Before, SourceFile, Wait) ->
     Ms = erlang:process_info(self(),messages),
-    After = {_,PPS1} = {{get(), lists:sort(ets:all()), Ms}, pps()},
+    After = {_,PPS1} = {{lget(), lists:sort(ets:all()), Ms}, pps()},
     case {R, After} of
         {ok, Before} ->
             ok;
@@ -7931,6 +7910,18 @@ wait_for_expected(R, {Strict0,PPS0}=Before, SourceFile, Wait) ->
             expected({ok,Before}, {R,After}, SourceFile)
     end.
 
+%% The qlc modules uses the process dictionary for storing names of files.
+lget() ->
+    lists:sort([T || {K, _} = T <- get(), is_qlc_key(K)]).
+
+%% Copied from the qlc module.
+-define(LCACHE_FILE(Ref), {Ref, '$_qlc_cache_tmpfiles_'}).
+-define(MERGE_JOIN_FILE, '$_qlc_merge_join_tmpfiles_').
+
+is_qlc_key(?LCACHE_FILE(_)) -> true;
+is_qlc_key(?MERGE_JOIN_FILE) -> true;
+is_qlc_key(_) -> false.
+
 unload_pt() ->
     erlang:garbage_collect(), % get rid of references to qlc_pt...
     _ = code:purge(qlc_pt),
diff --git a/lib/stdlib/test/rand_SUITE.erl b/lib/stdlib/test/rand_SUITE.erl
index f69d42551e..d753d929f5 100644
--- a/lib/stdlib/test/rand_SUITE.erl
+++ b/lib/stdlib/test/rand_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2000-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -29,11 +29,17 @@
 	 basic_stats_uniform_1/1, basic_stats_uniform_2/1,
 	 basic_stats_standard_normal/1,
 	 basic_stats_normal/1,
+         stats_standard_normal_box_muller/1,
+         stats_standard_normal_box_muller_2/1,
+         stats_standard_normal/1,
+         uniform_real_conv/1,
 	 plugin/1, measure/1,
 	 reference_jump_state/1, reference_jump_procdict/1]).
 
 -export([test/0, gen/1]).
 
+-export([uniform_real_gen/1, uniform_gen/2]).
+
 -include_lib("common_test/include/ct.hrl").
 
 -define(LOOP, 1000000).
@@ -47,6 +53,8 @@ all() ->
      api_eq,
      reference,
      {group, basic_stats},
+     {group, distr_stats},
+     uniform_real_conv,
      plugin, measure,
      {group, reference_jump}
     ].
@@ -55,12 +63,19 @@ groups() ->
     [{basic_stats, [parallel],
       [basic_stats_uniform_1, basic_stats_uniform_2,
        basic_stats_standard_normal]},
+     {distr_stats, [parallel],
+      [stats_standard_normal_box_muller,
+       stats_standard_normal_box_muller_2,
+       stats_standard_normal]},
      {reference_jump, [parallel],
       [reference_jump_state, reference_jump_procdict]}].
 
 group(basic_stats) ->
     %% valgrind needs a lot of time
     [{timetrap,{minutes,10}}];
+group(distr_stats) ->
+    %% valgrind needs a lot of time
+    [{timetrap,{minutes,10}}];
 group(reference_jump) ->
     %% valgrind needs a lot of time
     [{timetrap,{minutes,10}}].
@@ -73,9 +88,9 @@ test() ->
               try
                   ok = ?MODULE:Test([]),
                   io:format("~p: ok~n", [Test])
-              catch _:Reason ->
+              catch _:Reason:Stacktrace ->
                       io:format("Failed: ~p: ~p ~p~n",
-                                [Test, Reason, erlang:get_stacktrace()])
+                                [Test, Reason, Stacktrace])
               end
       end, Tests).
 
@@ -89,8 +104,8 @@ seed(Config) when is_list(Config) ->
     Algs = algs(),
     Test = fun(Alg) ->
 		   try seed_1(Alg)
-		   catch _:Reason ->
-			   ct:fail({Alg, Reason, erlang:get_stacktrace()})
+		   catch _:Reason:Stacktrace ->
+			   ct:fail({Alg, Reason, Stacktrace})
 		   end
 	   end,
     [Test(Alg) || Alg <- Algs],
@@ -101,7 +116,7 @@ seed_1(Alg) ->
     _ = rand:uniform(),
     S00 = get(rand_seed),
     erase(),
-    _ = rand:uniform(),
+    _ = rand:uniform_real(),
     false = S00 =:= get(rand_seed), %% hopefully
 
     %% Choosing algo and seed
@@ -228,11 +243,13 @@ interval_float(Config) when is_list(Config) ->
 interval_float_1(0) -> ok;
 interval_float_1(N) ->
     X = rand:uniform(),
+    Y = rand:uniform_real(),
     if
-	0.0 =< X, X < 1.0 ->
+	0.0 =< X, X < 1.0, 0.0 < Y, Y < 1.0 ->
 	    ok;
 	true ->
-	    io:format("X=~p 0=<~p<1.0~n", [X,X]),
+	    io:format("X=~p 0.0=<~p<1.0~n", [X,X]),
+	    io:format("Y=~p 0.0<~p<1.0~n", [Y,Y]),
 	    exit({X, rand:export_seed()})
     end,
     interval_float_1(N-1).
@@ -334,7 +351,13 @@ basic_stats_normal(Config) when is_list(Config) ->
       IntendedMeanVariancePairs).
 
 basic_uniform_1(N, S0, Sum, A0) when N > 0 ->
-    {X,S} = rand:uniform_s(S0),
+    {X,S} =
+        case N band 1 of
+            0 ->
+                rand:uniform_s(S0);
+            1 ->
+                rand:uniform_real_s(S0)
+        end,
     I = trunc(X*100),
     A = array:set(I, 1+array:get(I,A0), A0),
     basic_uniform_1(N-1, S, Sum+X, A);
@@ -399,6 +422,351 @@ normal_s(Mean, Variance, State0) when Mean == 0, Variance == 1 ->
 normal_s(Mean, Variance, State0) ->
     rand:normal_s(Mean, Variance, State0).
 
+
+
+-dialyzer({no_improper_lists, stats_standard_normal_box_muller/1}).
+stats_standard_normal_box_muller(Config) when is_list(Config) ->
+    try math:erfc(1.0) of
+        _ ->
+            TwoPi = 2.0 * math:pi(),
+            NormalS =
+                fun
+                    ([S0]) ->
+                        {U1, S1} = rand:uniform_real_s(S0),
+                        R = math:sqrt(-2.0 * math:log(U1)),
+                        {U2, S2} = rand:uniform_s(S1),
+                        T = TwoPi * U2,
+                        Z0 = R * math:cos(T),
+                        Z1 = R * math:sin(T),
+                        {Z0, [S2|Z1]};
+                    ([S|Z]) ->
+                        {Z, [S]}
+                end,
+            State = [rand:seed(exrop)],
+            stats_standard_normal(NormalS, State, 3)
+    catch error:_ ->
+            {skip, "math:erfc/1 not supported"}
+    end.
+
+-dialyzer({no_improper_lists, stats_standard_normal_box_muller_2/1}).
+stats_standard_normal_box_muller_2(Config) when is_list(Config) ->
+    try math:erfc(1.0) of
+        _ ->
+            TwoPi = 2.0 * math:pi(),
+            NormalS =
+                fun
+                    ([S0]) ->
+                        {U0, S1} = rand:uniform_s(S0),
+                        U1 = 1.0 - U0,
+                        R = math:sqrt(-2.0 * math:log(U1)),
+                        {U2, S2} = rand:uniform_s(S1),
+                        T = TwoPi * U2,
+                        Z0 = R * math:cos(T),
+                        Z1 = R * math:sin(T),
+                        {Z0, [S2|Z1]};
+                    ([S|Z]) ->
+                        {Z, [S]}
+                end,
+            State = [rand:seed(exrop)],
+            stats_standard_normal(NormalS, State, 3)
+    catch error:_ ->
+            {skip, "math:erfc/1 not supported"}
+    end.
+
+
+stats_standard_normal(Config) when is_list(Config) ->
+    try math:erfc(1.0) of
+        _ ->
+            stats_standard_normal(
+              fun rand:normal_s/1, rand:seed_s(exrop), 3)
+    catch error:_ ->
+            {skip, "math:erfc/1 not supported"}
+    end.
+%%
+stats_standard_normal(Fun, S, Retries) ->
+%%%
+%%% ct config:
+%%% {rand_SUITE, [{stats_standard_normal,[{seconds, 8}, {std_devs, 4.0}]}]}.
+%%%
+    Seconds = ct:get_config({?MODULE, ?FUNCTION_NAME, seconds}, 8),
+    StdDevs =
+        ct:get_config(
+          {?MODULE, ?FUNCTION_NAME, std_devs},
+          4.0), % probability erfc(4.0/sqrt(2)) (1/15787) to fail a bucket
+%%%
+    ct:timetrap({seconds, Seconds + 120}),
+    %% Buckets is chosen to get a range where the the probability to land
+    %% in the top catch-all bucket is not vanishingly low, but with
+    %% these values it is about 1/25 of the probability for the low bucket
+    %% (closest to 0).
+    %%
+    %% Rounds is calculated so the expected value for the low
+    %% bucket will be at least TargetHits.
+    %%
+    InvDelta = 512,
+    Buckets = 4 * InvDelta, % 4 std devs range
+    TargetHits = 1024,
+    Sqrt2 = math:sqrt(2.0),
+    W = InvDelta * Sqrt2,
+    P0 = math:erf(1 / W),
+    Rounds = TargetHits * ceil(1.0 / P0),
+    Histogram = array:new({default, 0}),
+    ct:pal(
+      "Running standard normal test against ~w std devs for ~w seconds...",
+      [StdDevs, Seconds]),
+    StopTime = erlang:monotonic_time(second) + Seconds,
+    {PositiveHistogram, NegativeHistogram, Outlier, TotalRounds, NewS} =
+        stats_standard_normal(
+          InvDelta, Buckets, Histogram, Histogram, 0.0,
+          Fun, S, Rounds, StopTime, Rounds, 0),
+    Precision = math:sqrt(TotalRounds * P0) / StdDevs,
+    TopP = math:erfc(Buckets / W),
+    TopPrecision = math:sqrt(TotalRounds * TopP) / StdDevs,
+    OutlierProbability = math:erfc(Outlier / Sqrt2) * TotalRounds,
+    InvOP = 1.0 / OutlierProbability,
+    ct:pal(
+      "Total rounds: ~w, tolerance: 1/~.2f..1/~.2f, "
+      "outlier: ~.2f, probability 1/~.2f.",
+      [TotalRounds, Precision, TopPrecision, Outlier, InvOP]),
+    case
+        {bucket_error, TotalRounds,
+         check_histogram(
+           W, TotalRounds, StdDevs, PositiveHistogram, Buckets),
+         check_histogram(
+           W, TotalRounds, StdDevs, NegativeHistogram, Buckets)}
+    of
+        {_, _, [], []} when InvOP < 100 ->
+            {comment, {tp, TopPrecision, op, InvOP}};
+        {_, _, [], []} ->
+            %% If the probability for getting this Outlier is lower than
+            %% 1/100, then this is fishy!
+            stats_standard_normal(
+              Fun, NewS, Retries, {outlier_fishy, InvOP});
+        BucketErrors ->
+            stats_standard_normal(
+              Fun, NewS, Retries, BucketErrors)
+    end.
+%%
+stats_standard_normal(Fun, S, Retries, Failure) ->
+    case Retries - 1 of
+        0 ->
+            ct:fail(Failure);
+        NewRetries ->
+            ct:pal("Retry due to TC glitch: ~p", [Failure]),
+            stats_standard_normal(Fun, S, NewRetries)
+    end.
+%%
+stats_standard_normal(
+  InvDelta, Buckets, PositiveHistogram, NegativeHistogram, Outlier,
+  Fun, S, 0, StopTime, Rounds, TotalRounds) ->
+    case erlang:monotonic_time(second) of
+        Now when Now < StopTime ->
+            stats_standard_normal(
+              InvDelta, Buckets,
+              PositiveHistogram, NegativeHistogram, Outlier,
+              Fun, S, Rounds, StopTime, Rounds, TotalRounds + Rounds);
+        _ ->
+            {PositiveHistogram, NegativeHistogram,
+             Outlier, TotalRounds + Rounds, S}
+    end;
+stats_standard_normal(
+  InvDelta, Buckets, PositiveHistogram, NegativeHistogram, Outlier,
+  Fun, S, Count, StopTime, Rounds, TotalRounds) ->
+    case Fun(S) of
+        {X, NewS} when 0.0 =< X ->
+            Bucket = min(Buckets, floor(X * InvDelta)),
+            stats_standard_normal(
+              InvDelta, Buckets,
+              increment_bucket(Bucket, PositiveHistogram),
+              NegativeHistogram, max(Outlier, X),
+              Fun, NewS, Count - 1, StopTime, Rounds, TotalRounds);
+        {MinusX, NewS} ->
+            X = -MinusX,
+            Bucket = min(Buckets, floor(X * InvDelta)),
+            stats_standard_normal(
+              InvDelta, Buckets,
+              PositiveHistogram,
+              increment_bucket(Bucket, NegativeHistogram), max(Outlier, X),
+              Fun, NewS, Count - 1, StopTime, Rounds, TotalRounds)
+    end.
+
+increment_bucket(Bucket, Array) ->
+    array:set(Bucket, array:get(Bucket, Array) + 1, Array).
+
+check_histogram(W, Rounds, StdDevs, Histogram, Buckets) ->
+    TargetP = 0.5 * math:erfc(Buckets / W),
+    P = 0.0,
+    N = 0,
+    check_histogram(
+      W, Rounds, StdDevs, Histogram, TargetP,
+      Buckets, Buckets, P, N).
+%%
+check_histogram(
+  _W, _Rounds, _StdDevs, _Histogram, _TargetP,
+  0, _PrevBucket, _PrevP, _PrevN) ->
+    [];
+check_histogram(
+  W, Rounds, StdDevs, Histogram, TargetP,
+  Bucket, PrevBucket, PrevP, PrevN) ->
+    N = PrevN + array:get(Bucket, Histogram),
+    P = 0.5 * math:erfc(Bucket / W),
+    BucketP = P - PrevP,
+    if
+        BucketP < TargetP ->
+            check_histogram(
+              W, Rounds, StdDevs, Histogram, TargetP,
+              Bucket - 1, PrevBucket, PrevP, N);
+        true ->
+            Exp = BucketP * Rounds,
+            Var = Rounds * BucketP*(1.0 - BucketP),
+            Threshold = StdDevs * math:sqrt(Var),
+            LowerLimit = floor(Exp - Threshold),
+            UpperLimit = ceil(Exp + Threshold),
+            if
+                N < LowerLimit; UpperLimit < N ->
+                    [#{bucket => {Bucket, PrevBucket}, n => N,
+                       lower => LowerLimit, upper => UpperLimit} |
+                     check_histogram(
+                       W, Rounds, StdDevs, Histogram, TargetP,
+                       Bucket - 1, Bucket, P, 0)];
+                true ->
+                    check_histogram(
+                      W, Rounds, StdDevs, Histogram, TargetP,
+                      Bucket - 1, Bucket, P, 0)
+            end
+    end.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% White box test of the conversion to float
+
+uniform_real_conv(Config) when is_list(Config) ->
+    [begin
+%%         ct:pal("~13.16.0bx~3.16.0b: ~p~n", [M,E,Gen]),
+         uniform_real_conv_check(M, E, Gen)
+     end || {M, E, Gen} <- uniform_real_conv_data()],
+    uniform_real_scan(0),
+    uniform_real_scan(3).
+
+uniform_real_conv_data() ->
+    [{16#fffffffffffff,  -1, [16#3ffffffffffffff]},
+     {16#fffffffffffff,  -1, [16#3ffffffffffffe0]},
+     {16#ffffffffffffe,  -1, [16#3ffffffffffffdf]},
+     %%
+     {16#0000000000000,  -1, [16#200000000000000]},
+     {16#fffffffffffff,  -2, [16#1ffffffffffffff]},
+     {16#fffffffffffff,  -2, [16#1fffffffffffff0]},
+     {16#ffffffffffffe,  -2, [16#1ffffffffffffef]},
+     %%
+     {16#0000000000000,  -2, [16#100000000000000]},
+     {16#fffffffffffff,  -3, [16#0ffffffffffffff]},
+     {16#fffffffffffff,  -3, [16#0fffffffffffff8]},
+     {16#ffffffffffffe,  -3, [16#0fffffffffffff7]},
+     %%
+     {16#0000000000000,  -3, [16#080000000000000]},
+     {16#fffffffffffff,  -4, [16#07fffffffffffff]},
+     {16#fffffffffffff,  -4, [16#07ffffffffffffc]},
+     {16#ffffffffffffe,  -4, [16#07ffffffffffffb]},
+     %%
+     {16#0000000000000,  -4, [16#040000000000000]},
+     {16#fffffffffffff,  -5, [16#03fffffffffffff,16#3ffffffffffffff]},
+     {16#fffffffffffff,  -5, [16#03ffffffffffffe,16#200000000000000]},
+     {16#ffffffffffffe,  -5, [16#03fffffffffffff,16#1ffffffffffffff]},
+     {16#ffffffffffffe,  -5, [16#03fffffffffffff,16#100000000000000]},
+     %%
+     {16#0000000000001, -56, [16#000000000000007,16#00000000000007f]},
+     {16#0000000000001, -56, [16#000000000000004,16#000000000000040]},
+     {16#0000000000000, -57, [16#000000000000003,16#20000000000001f]},
+     {16#0000000000000, -57, [16#000000000000000,16#200000000000000]},
+     {16#fffffffffffff, -58, [16#000000000000003,16#1ffffffffffffff]},
+     {16#fffffffffffff, -58, [16#000000000000000,16#1fffffffffffff0]},
+     {16#ffffffffffffe, -58, [16#000000000000000,16#1ffffffffffffef]},
+     {16#ffffffffffffe, -58, [16#000000000000000,16#1ffffffffffffe0]},
+     %%
+     {16#0000000000000, -58, [16#000000000000000,16#10000000000000f]},
+     {16#0000000000000, -58, [16#000000000000000,16#100000000000000]},
+     {2#11001100000000000000000000000000000000000011000000011, % 53 bits
+      -1022,
+      [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, % 18 zeros
+       2#1100110000000000000000000000000000000000001 bsl 2, % 43 bits
+       2#1000000011 bsl (56-10+2)]}, % 10 bits
+     {0, -1, % 0.5 after retry
+      [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, % 18 zeros
+       2#111111111111111111111111111111111111111111 bsl 2, % 42 bits - retry
+       16#200000000000003]}]. % 0.5
+
+-define(UNIFORM_REAL_SCAN_PATTERN, (16#19000000000009)). % 53 bits
+-define(UNIFORM_REAL_SCAN_NUMBER, (1021)).
+
+uniform_real_scan_template(K) ->
+    <<0:?UNIFORM_REAL_SCAN_NUMBER,
+      ?UNIFORM_REAL_SCAN_PATTERN:53,K:2,0:1>>.
+
+uniform_real_scan(K) ->
+    Templ = uniform_real_scan_template(K),
+    N = ?UNIFORM_REAL_SCAN_NUMBER,
+    uniform_real_scan(Templ, N, K).
+
+uniform_real_scan(Templ, N, K) when 0 =< N ->
+    <<_:N/bits,T/bits>> = Templ,
+    Data = uniform_real_scan_data(T, K),
+    uniform_real_conv_check(
+      ?UNIFORM_REAL_SCAN_PATTERN, N - 1 - ?UNIFORM_REAL_SCAN_NUMBER, Data),
+    uniform_real_scan(Templ, N - 1, K);
+uniform_real_scan(_, _, _) ->
+    ok.
+
+uniform_real_scan_data(Templ, K) ->
+    case Templ of
+        <<X:56, T/bits>> ->
+            B = rand:bc64(X),
+            [(X bsl 2) bor K |
+             if
+                 53 =< B ->
+                     [];
+                 true ->
+                     uniform_real_scan_data(T, K)
+             end];
+        _ ->
+            <<X:56, _/bits>> = <<Templ/bits, 0:56>>,
+            [(X bsl 2) bor K]
+    end.
+
+uniform_real_conv_check(M, E, Gen) ->
+    <<F/float>> = <<0:1, (E + 16#3ff):11, M:52>>,
+    try uniform_real_gen(Gen) of
+        F -> F;
+        FF ->
+            ct:pal(
+              "~s =/= ~s: ~s~n",
+              [rand:float2str(FF), rand:float2str(F),
+               [["16#",integer_to_list(G,16),$\s]||G<-Gen]]),
+            ct:fail({neq, FF, F})
+    catch
+        Error:Reason:Stacktrace ->
+            ct:pal(
+              "~w:~p ~s: ~s~n",
+              [Error, Reason, rand:float2str(F),
+               [["16#",integer_to_list(G,16),$\s]||G<-Gen]]),
+            ct:fail({Error, Reason, F, Stacktrace})
+    end.
+
+
+uniform_real_gen(Gen) ->
+    State = rand_state(Gen),
+    {F, {#{type := rand_SUITE_list},[]}} = rand:uniform_real_s(State),
+    F.
+
+uniform_gen(Range, Gen) ->
+    State = rand_state(Gen),
+    {N, {#{type := rand_SUITE_list},[]}} = rand:uniform_s(Range, State),
+    N.
+
+%% Loaded dice for white box tests
+rand_state(Gen) ->
+    {#{type => rand_SUITE_list, bits => 58, weak_low_bits => 1,
+       next => fun ([H|T]) -> {H, T} end},
+     Gen}.
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %% Test that the user can write algorithms.
@@ -520,6 +888,21 @@ do_measure(_Config) ->
           end,
           Algs),
     %%
+    ct:pal("~nRNG uniform integer half range performance~n",[]),
+    _ =
+        measure_1(
+          fun (State) -> half_range(State) end,
+          fun (State, Range, Mod) ->
+                  measure_loop(
+                    fun (St0) ->
+                            ?CHECK_UNIFORM_RANGE(
+                               Mod:uniform_s(Range, St0), Range,
+                               X, St1)
+                    end,
+                    State)
+          end,
+          Algs),
+    %%
     ct:pal("~nRNG uniform integer half range + 1 performance~n",[]),
     _ =
         measure_1(
@@ -630,7 +1013,8 @@ do_measure(_Config) ->
           Algs),
     %%
     ct:pal("~nRNG uniform float performance~n",[]),
-    _ = measure_1(
+    _ =
+        measure_1(
           fun (_) -> 0 end,
           fun (State, _, Mod) ->
                   measure_loop(
@@ -641,8 +1025,22 @@ do_measure(_Config) ->
           end,
           Algs),
     %%
+    ct:pal("~nRNG uniform_real float performance~n",[]),
+    _ =
+        measure_1(
+          fun (_) -> 0 end,
+          fun (State, _, Mod) ->
+                  measure_loop(
+                    fun (St0) ->
+                            ?CHECK_UNIFORM(Mod:uniform_real_s(St0), X, St)
+                    end,
+                    State)
+          end,
+          Algs),
+    %%
     ct:pal("~nRNG normal float performance~n",[]),
-    _ = measure_1(
+    [TMarkNormalFloat|_] =
+        measure_1(
           fun (_) -> 0 end,
           fun (State, _, Mod) ->
                   measure_loop(
@@ -652,10 +1050,36 @@ do_measure(_Config) ->
                     State)
           end,
           Algs),
+    %% Just for fun try an implementation of the Box-Muller
+    %% transformation for creating normal distribution floats
+    %% to compare with our Ziggurat implementation.
+    %% Generates two numbers per call that we add so they
+    %% will not be optimized away.  Hence the benchmark time
+    %% is twice what it should be.
+    TwoPi = 2 * math:pi(),
+    _ =
+        measure_1(
+          fun (_) -> 0 end,
+          fun (State, _, Mod) ->
+                  measure_loop(
+                    fun (State0) ->
+                            {U1, State1} = Mod:uniform_real_s(State0),
+                            {U2, State2} = Mod:uniform_s(State1),
+                            R = math:sqrt(-2.0 * math:log(U1)),
+                            T = TwoPi * U2,
+                            Z0 = R * math:cos(T),
+                            Z1 = R * math:sin(T),
+                            ?CHECK_NORMAL({Z0 + Z1, State2}, X, State3)
+                    end,
+                    State)
+          end,
+          exrop, TMarkNormalFloat),
     ok.
 
+-define(LOOP_MEASURE, (?LOOP div 5)).
+
 measure_loop(Fun, State) ->
-    measure_loop(Fun, State, ?LOOP).
+    measure_loop(Fun, State, ?LOOP_MEASURE).
 %%
 measure_loop(Fun, State, N) when 0 < N ->
     measure_loop(Fun, Fun(State), N-1);
@@ -693,7 +1117,8 @@ measure_1(RangeFun, Fun, Alg, TMark) ->
                         end,
                     io:format(
                       "~.12w: ~p ns ~p% [16#~.16b]~n",
-                      [Alg, (Time * 1000 + 500) div ?LOOP, Percent, Range]),
+                      [Alg, (Time * 1000 + 500) div ?LOOP_MEASURE,
+                       Percent, Range]),
                     Parent ! {self(), Time},
                     normal
             end),
diff --git a/lib/stdlib/test/re_SUITE.erl b/lib/stdlib/test/re_SUITE.erl
index 71f86e32e5..7b82647416 100644
--- a/lib/stdlib/test/re_SUITE.erl
+++ b/lib/stdlib/test/re_SUITE.erl
@@ -894,10 +894,13 @@ match_limit(Config) when is_list(Config) ->
 %% Test that we get sub-binaries if subject is a binary and we capture
 %% binaries.
 sub_binaries(Config) when is_list(Config) ->
-    Bin = list_to_binary(lists:seq(1,255)),
-    {match,[B,C]}=re:run(Bin,"(a)",[{capture,all,binary}]),
-    255 = binary:referenced_byte_size(B),
-    255 = binary:referenced_byte_size(C),
-    {match,[D]}=re:run(Bin,"(a)",[{capture,[1],binary}]),
-    255 = binary:referenced_byte_size(D),
+    %% The GC can auto-convert tiny sub-binaries to heap binaries, so we
+    %% extract large sequences to make the test more stable.
+    Bin = << <<I>> || I <- lists:seq(1, 4096) >>,
+    {match,[B,C]}=re:run(Bin,"a(.+)$",[{capture,all,binary}]),
+    true = byte_size(B) =/= byte_size(C),
+    4096 = binary:referenced_byte_size(B),
+    4096 = binary:referenced_byte_size(C),
+    {match,[D]}=re:run(Bin,"a(.+)$",[{capture,[1],binary}]),
+    4096 = binary:referenced_byte_size(D),
     ok.
diff --git a/lib/stdlib/test/sets_SUITE.erl b/lib/stdlib/test/sets_SUITE.erl
index bec38000b2..7066d07e19 100644
--- a/lib/stdlib/test/sets_SUITE.erl
+++ b/lib/stdlib/test/sets_SUITE.erl
@@ -28,7 +28,7 @@
 	 init_per_testcase/2,end_per_testcase/2,
 	 create/1,add_element/1,del_element/1,
 	 subtract/1,intersection/1,union/1,is_subset/1,
-	 is_set/1,fold/1,filter/1,
+	 is_set/1,is_empty/1,fold/1,filter/1,
 	 take_smallest/1,take_largest/1, iterate/1]).
 
 -include_lib("common_test/include/ct.hrl").
@@ -48,7 +48,7 @@ suite() ->
 all() -> 
     [create, add_element, del_element, subtract,
      intersection, union, is_subset, is_set, fold, filter,
-     take_smallest, take_largest, iterate].
+     take_smallest, take_largest, iterate, is_empty].
 
 groups() -> 
     [].
@@ -345,6 +345,17 @@ is_set_1(M) ->
     false = M(is_set, {}),
     M(empty, []).
 
+is_empty(Config) when is_list(Config) ->
+    test_all(fun is_empty_1/1).
+
+is_empty_1(M) ->
+    S = M(from_list, [blurf]),
+    Empty = M(empty, []),
+
+    true = M(is_empty, Empty),
+    false = M(is_empty, S),
+    M(empty, []).
+
 fold(Config) when is_list(Config) ->
     test_all([{0,71},{125,129},{254,259},{510,513},{1023,1025},{9999,10001}],
 	     fun fold_1/2).
diff --git a/lib/stdlib/test/sets_test_lib.erl b/lib/stdlib/test/sets_test_lib.erl
index 9f153822a2..93d027704b 100644
--- a/lib/stdlib/test/sets_test_lib.erl
+++ b/lib/stdlib/test/sets_test_lib.erl
@@ -32,7 +32,7 @@ new(Mod, Eq) ->
 	(from_list, L) -> Mod:from_list(L);
 	(intersection, {S1,S2}) -> intersection(Mod, Eq, S1, S2);
 	(intersection, Ss) -> intersection(Mod, Eq, Ss);
-	(is_empty, S) -> is_empty(Mod, S);
+	(is_empty, S) -> Mod:is_empty(S);
 	(is_set, S) -> Mod:is_set(S);
 	(is_subset, {S,Set}) -> is_subset(Mod, Eq, S, Set);
         (iterator, S) -> Mod:iterator(S);
@@ -56,7 +56,7 @@ singleton(Mod, E) ->
 add_element(Mod, El, S0) ->
     S = Mod:add_element(El, S0),
     true = Mod:is_element(El, S),
-    false = is_empty(Mod, S),
+    false = Mod:is_empty(S),
     true = Mod:is_set(S),
     S.
 
@@ -66,17 +66,10 @@ del_element(Mod, El, S0) ->
     true = Mod:is_set(S),
     S.
 
-is_empty(Mod, S) ->
-    true = Mod:is_set(S),
-    case erlang:function_exported(Mod, is_empty, 1) of
-	true -> Mod:is_empty(S);
-	false -> Mod:size(S) == 0
-    end.
-
 intersection(Mod, Equal, S1, S2) ->
     S = Mod:intersection(S1, S2),
     true = Equal(S, Mod:intersection(S2, S1)),
-    Disjoint = is_empty(Mod, S),
+    Disjoint = Mod:is_empty(S),
     Disjoint = Mod:is_disjoint(S1, S2),
     Disjoint = Mod:is_disjoint(S2, S1),
     S.
diff --git a/lib/stdlib/test/shell_SUITE.erl b/lib/stdlib/test/shell_SUITE.erl
index 217e8cc252..ca85314775 100644
--- a/lib/stdlib/test/shell_SUITE.erl
+++ b/lib/stdlib/test/shell_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2004-2017. All Rights Reserved.
+%% Copyright Ericsson AB 2004-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -561,9 +561,10 @@ otp_5226(Config) when is_list(Config) ->
 otp_5327(Config) when is_list(Config) ->
     "exception error: bad argument" =
         comm_err(<<"<<\"hej\":default>>.">>),
+    L1 = erl_anno:new(1),
     <<"abc">> =
-        erl_parse:normalise({bin,1,[{bin_element,1,{string,1,"abc"},
-				     default,default}]}),
+        erl_parse:normalise({bin,L1,[{bin_element,L1,{string,L1,"abc"},
+                                      default,default}]}),
     [<<"abc">>] = scan(<<"<<(<<\"abc\">>):3/binary>>.">>),
     [<<"abc">>] = scan(<<"<<(<<\"abc\">>)/binary>>.">>),
     "exception error: bad argument" =
@@ -576,9 +577,9 @@ otp_5327(Config) when is_list(Config) ->
         comm_err(<<"<<10:default>>.">>),
     [<<98,1:1>>] = scan(<<"<<3:3,5:6>>.">>),
     {'EXIT',{badarg,_}} =
-        (catch erl_parse:normalise({bin,1,[{bin_element,1,{integer,1,17},
-                                            {atom,1,all},
-                                            default}]})),
+        (catch erl_parse:normalise({bin,L1,[{bin_element,L1,{integer,L1,17},
+                                             {atom,L1,all},
+                                             default}]})),
     [<<-20/signed>>] = scan(<<"<<-20/signed>> = <<-20>>.">>),
     [<<-300:16/signed>>] =
 	scan(<<"<<-300:16/signed>> = <<-300:16>>.">>),
@@ -2784,7 +2785,7 @@ otp_10302(Config) when is_list(Config) ->
         <<"begin
                A = <<\"\\xaa\">>,
                S = lists:flatten(io_lib:format(\"~p/~p.\", [A, A])),
-               {ok, Ts, _} = erl_scan:string(S, 1, [unicode]),
+               {ok, Ts, _} = erl_scan:string(S, 1),
                {ok, Es} = erl_parse:parse_exprs(Ts),
                B = erl_eval:new_bindings(),
                erl_eval:exprs(Es, B)
@@ -2797,7 +2798,7 @@ otp_10302(Config) when is_list(Config) ->
         <<"io:setopts([{encoding,utf8}]).
            A = <<\"\\xaa\">>,
            S = lists:flatten(io_lib:format(\"~p/~p.\", [A, A])),
-           {ok, Ts, _} = erl_scan:string(S, 1, [unicode]),
+           {ok, Ts, _} = erl_scan:string(S, 1),
            {ok, Es} = erl_parse:parse_exprs(Ts),
            B = erl_eval:new_bindings(),
            erl_eval:exprs(Es, B).">>,
@@ -2809,7 +2810,7 @@ otp_10302(Config) when is_list(Config) ->
         <<"begin
                A = [1089],
                S = lists:flatten(io_lib:format(\"~tp/~tp.\", [A, A])),
-               {ok, Ts, _} = erl_scan:string(S, 1, [unicode]),
+               {ok, Ts, _} = erl_scan:string(S, 1),
                {ok, Es} = erl_parse:parse_exprs(Ts),
                B = erl_eval:new_bindings(),
                erl_eval:exprs(Es, B)
@@ -2821,7 +2822,7 @@ otp_10302(Config) when is_list(Config) ->
         <<"io:setopts([{encoding,utf8}]).
            A = [1089],
            S = lists:flatten(io_lib:format(\"~tp/~tp.\", [A, A])),
-           {ok, Ts, _} = erl_scan:string(S, 1, [unicode]),
+           {ok, Ts, _} = erl_scan:string(S, 1),
            {ok, Es} = erl_parse:parse_exprs(Ts),
            B = erl_eval:new_bindings(),
            erl_eval:exprs(Es, B).">>,
@@ -2940,7 +2941,7 @@ otp_14296(Config) when is_list(Config) ->
     end(),
 
     fun() ->
-            Port = open_port({spawn, "ls"}, [line]),
+            Port = open_port({spawn, "ls"}, [{line,1}]),
             KnownPort = erlang:port_to_list(Port),
             S = KnownPort ++ ".",
             R = KnownPort ++ ".\n",
@@ -3012,7 +3013,7 @@ scan(B) ->
     scan(t(B), F).
 
 scan(S0, F) ->
-    case erl_scan:tokens([], S0, 1, [unicode]) of
+    case erl_scan:tokens([], S0, 1) of
         {done,{ok,Ts,_},S} ->
             [F(Ts) | scan(S, F)];
         _Else ->
diff --git a/lib/stdlib/test/stdlib.spec b/lib/stdlib/test/stdlib.spec
index 91712b8963..9c625091a8 100644
--- a/lib/stdlib/test/stdlib.spec
+++ b/lib/stdlib/test/stdlib.spec
@@ -1,2 +1,4 @@
 {suites,"../stdlib_test",all}.
-{skip_suites,"../stdlib_test",stdlib_bench_SUITE, "bench only"}.
+{skip_groups,"../stdlib_test",stdlib_bench_SUITE,
+             [base64,gen_server,gen_statem,unicode],
+             "Benchmark only"}.
diff --git a/lib/stdlib/test/stdlib_bench.spec b/lib/stdlib/test/stdlib_bench.spec
index a5d1e1db80..7a0da811a0 100644
--- a/lib/stdlib/test/stdlib_bench.spec
+++ b/lib/stdlib/test/stdlib_bench.spec
@@ -5,3 +5,6 @@
 {skip_suites,"../stdlib_test",string_SUITE, "bench only"}.
 
 {suites,"../stdlib_test",[stdlib_bench_SUITE]}.
+{skip_groups,"../stdlib_test",stdlib_bench_SUITE,
+             [gen_server_comparison,gen_statem_comparison],
+             "Not a benchmark"}.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE.erl b/lib/stdlib/test/stdlib_bench_SUITE.erl
index 8670e7029c..2364e8376f 100644
--- a/lib/stdlib/test/stdlib_bench_SUITE.erl
+++ b/lib/stdlib/test/stdlib_bench_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2012-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2012-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@
 %%
 -module(stdlib_bench_SUITE).
 -compile([export_all, nowarn_export_all]).
+-include_lib("common_test/include/ct.hrl").
 -include_lib("common_test/include/ct_event.hrl").
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -28,14 +29,55 @@ suite() -> [{ct_hooks,[{ts_install_cth,[{nodenames,2}]}]}].
 
 
 all() ->
-    [{group,unicode}].
+    [{group,unicode},{group,base64},
+     {group,gen_server},{group,gen_statem},
+     {group,gen_server_comparison},{group,gen_statem_comparison}].
 
 groups() ->
     [{unicode,[{repeat,5}],
       [norm_nfc_list, norm_nfc_deep_l, norm_nfc_binary,
        string_lexemes_list, string_lexemes_binary
-      ]}].
+      ]},
+     {base64,[{repeat,5}],
+      [decode_binary, decode_binary_to_string,
+       decode_list, decode_list_to_string,
+       encode_binary, encode_binary_to_string,
+       encode_list, encode_list_to_string,
+       mime_binary_decode, mime_binary_decode_to_string,
+       mime_list_decode, mime_list_decode_to_string]},
+     {gen_server, [{repeat,5}], cases(gen_server)},
+     {gen_statem, [{repeat,3}], cases(gen_statem)},
+     {gen_server_comparison, [],
+      [single_small, single_medium, single_big,
+       sched_small, sched_medium, sched_big,
+       multi_small, multi_medium, multi_big]},
+     {gen_statem_comparison, [],
+      [single_small, single_big,
+       sched_small, sched_big,
+       multi_small, multi_big]}].
 
+cases(gen_server) ->
+      [simple, simple_timer, simple_mon, simple_timer_mon,
+       generic, generic_timer];
+cases(gen_statem) ->
+    [generic, generic_fsm, generic_fsm_transit,
+     generic_statem, generic_statem_transit,
+     generic_statem_complex].
+
+init_per_group(gen_server, Config) ->
+    compile_servers(Config),
+    [{benchmark_suite,"stdlib_gen_server"}|Config];
+init_per_group(gen_statem, Config) ->
+    compile_servers(Config),
+    [{benchmark_suite,"stdlib_gen_statem"}|Config];
+init_per_group(gen_server_comparison, Config) ->
+    compile_servers(Config),
+    [{cases,cases(gen_server)},
+     {benchmark_suite,"stdlib_gen_server"}|Config];
+init_per_group(gen_statem_comparison, Config) ->
+    compile_servers(Config),
+    [{cases,cases(gen_statem)},
+     {benchmark_suite,"stdlib_gen_statem"}|Config];
 init_per_group(_GroupName, Config) ->
     Config.
 
@@ -55,23 +97,33 @@ end_per_testcase(_Func, _Conf) ->
     ok.
 
 
+compile_servers(Config) ->
+    DataDir = ?config(data_dir, Config),
+    Files = filelib:wildcard(filename:join(DataDir, "{simple,generic}*.erl")),
+    _ = [{ok, _} = compile:file(File) || File <- Files],
+    ok.
+
+comment(Value) ->
+    C = lists:flatten(io_lib:format("~p", [Value])),
+    {comment, C}.
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 -define(REPEAT_NORM, 5).
 
 norm_nfc_list(Config) ->
     Bin = norm_data(Config),
     {_N, Mean, _Stddev, Res} = unicode_util_SUITE:time_count(nfc, list, Bin, ?REPEAT_NORM),
-    report(1000.0*Res / Mean).
+    comment(report(1000.0*Res / Mean)).
 
 norm_nfc_deep_l(Config) ->
     Bin = norm_data(Config),
     {_N, Mean, _Stddev, Res} = unicode_util_SUITE:time_count(nfc, deep_l, Bin, ?REPEAT_NORM),
-    report(1000.0*Res / Mean).
+    comment(report(1000.0*Res / Mean)).
 
 norm_nfc_binary(Config) ->
     Bin = norm_data(Config),
     {_N, Mean, _Stddev, Res} = unicode_util_SUITE:time_count(nfc, binary, Bin, ?REPEAT_NORM),
-    report(1000.0*Res / Mean).
+    comment(report(1000.0*Res / Mean)).
 
 
 string_lexemes_list(Config) ->
@@ -80,7 +132,7 @@ string_lexemes_list(Config) ->
     Bin = norm_data(Config),
     Fun = fun(Str) -> string:nth_lexeme(Str, 200000, [$;,$\n,$\r]), 200000 end,
     {_N, Mean, _Stddev, Res} = string_SUITE:time_func(Fun, list, Bin, 15),
-    report(1000.0*Res / Mean).
+    comment(report(1000.0*Res / Mean)).
 
 string_lexemes_binary(Config) ->
     %% Use nth_lexeme instead of lexemes to avoid building a result of
@@ -88,7 +140,7 @@ string_lexemes_binary(Config) ->
     Bin = norm_data(Config),
     Fun = fun(Str) -> string:nth_lexeme(Str, 200000, [$;,$\n,$\r]), 200000 end,
     {_N, Mean, _Stddev, Res} = string_SUITE:time_func(Fun, binary, Bin, ?REPEAT_NORM),
-    report(1000.0*Res / Mean).
+    comment(report(1000.0*Res / Mean)).
 
 %%%
 report(Tps) ->
@@ -105,3 +157,390 @@ norm_data(Config) ->
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+decode_binary(_Config) ->
+    comment(test(decode, encoded_binary())).
+
+decode_binary_to_string(_Config) ->
+    comment(test(decode_to_string, encoded_binary())).
+
+decode_list(_Config) ->
+    comment(test(decode, encoded_list())).
+
+decode_list_to_string(_Config) ->
+    comment(test(decode_to_string, encoded_list())).
+
+encode_binary(_Config) ->
+    comment(test(encode, binary())).
+
+encode_binary_to_string(_Config) ->
+    comment(test(encode_to_string, binary())).
+
+encode_list(_Config) ->
+    comment(test(encode, list())).
+
+encode_list_to_string(_Config) ->
+    comment(test(encode_to_string, list())).
+
+mime_binary_decode(_Config) ->
+    comment(test(mime_decode, encoded_binary())).
+
+mime_binary_decode_to_string(_Config) ->
+    comment(test(mime_decode_to_string, encoded_binary())).
+
+mime_list_decode(_Config) ->
+    comment(test(mime_decode, encoded_list())).
+
+mime_list_decode_to_string(_Config) ->
+    comment(test(mime_decode_to_string, encoded_list())).
+
+-define(SIZE, 10000).
+-define(N, 1000).
+
+encoded_binary() ->
+    list_to_binary(encoded_list()).
+
+encoded_list() ->
+    L = random_byte_list(round(?SIZE*0.75)),
+    base64:encode_to_string(L).
+
+binary() ->
+    list_to_binary(list()).
+
+list() ->
+    random_byte_list(?SIZE).
+
+test(Func, Data) ->
+    F = fun() -> loop(?N, Func, Data) end,
+    {Time, ok} = timer:tc(fun() -> lspawn(F) end),
+    report_base64(Time).
+
+loop(0, _F, _D) -> garbage_collect(), ok;
+loop(N, F, D) ->
+    _ = base64:F(D),
+    loop(N - 1, F, D).
+
+lspawn(Fun) ->
+    {Pid, Ref} = spawn_monitor(fun() -> exit(Fun()) end),
+    receive
+        {'DOWN', Ref, process, Pid, Rep} -> Rep
+    end.
+
+report_base64(Time) ->
+    Tps = round((?N*1000000)/Time),
+    ct_event:notify(#event{name = benchmark_data,
+                           data = [{suite, "stdlib_base64"},
+                                   {value, Tps}]}),
+    Tps.
+
+%% Copied from base64_SUITE.erl.
+
+random_byte_list(N) ->
+    random_byte_list(N, []).
+
+random_byte_list(0, Acc) ->
+    Acc;
+random_byte_list(N, Acc) ->
+    random_byte_list(N-1, [rand:uniform(255)|Acc]).
+
+make_big_binary(N) ->
+    list_to_binary(mbb(N, [])).
+
+mbb(N, Acc) when N > 256 ->
+    B = list_to_binary(lists:seq(0, 255)),
+    mbb(N - 256, [B | Acc]);
+mbb(N, Acc) ->
+    B = list_to_binary(lists:seq(0, N-1)),
+    lists:reverse(Acc, B).
+
+simple(Config) when is_list(Config) ->
+    comment(do_tests(simple, single_small, Config)).
+
+simple_timer(Config) when is_list(Config) ->
+    comment(do_tests(simple_timer, single_small, Config)).
+
+simple_mon(Config) when is_list(Config) ->
+    comment(do_tests(simple_mon, single_small, Config)).
+
+simple_timer_mon(Config) when is_list(Config) ->
+    comment(do_tests(simple_timer_mon, single_small, Config)).
+
+generic(Config) when is_list(Config) ->
+    comment(do_tests(generic, single_small, Config)).
+
+generic_timer(Config) when is_list(Config) ->
+    comment(do_tests(generic_timer, single_small, Config)).
+
+generic_statem(Config) when is_list(Config) ->
+    comment(do_tests(generic_statem, single_small, Config)).
+
+generic_statem_transit(Config) when is_list(Config) ->
+    comment(do_tests(generic_statem_transit, single_small, Config)).
+
+generic_statem_complex(Config) when is_list(Config) ->
+    comment(do_tests(generic_statem_complex, single_small, Config)).
+
+generic_fsm(Config) when is_list(Config) ->
+    comment(do_tests(generic_fsm, single_small, Config)).
+
+generic_fsm_transit(Config) when is_list(Config) ->
+    comment(do_tests(generic_fsm_transit, single_small, Config)).
+
+single_small(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), single_small, Config).
+
+single_medium(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), single_medium, Config).
+
+single_big(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), single_big, Config).
+
+sched_small(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), sched_small, Config).
+
+sched_medium(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), sched_medium, Config).
+
+sched_big(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), sched_big, Config).
+
+multi_small(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), multi_small, Config).
+
+multi_medium(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), multi_medium, Config).
+
+multi_big(Config) when is_list(Config) ->
+    comparison(?config(cases, Config), multi_big, Config).
+
+comparison(Cases, Kind, Config) ->
+    Cases = ?config(cases, Config),
+    [RefResult|_] = Results =
+        [do_tests(Case, Kind, Config) || Case <- Cases],
+    Normalized = [norm(Result, RefResult) || Result <- Results],
+    {Parallelism, Message} = bench_params(Kind),
+    Wordsize = erlang:system_info(wordsize),
+    MSize = Wordsize * erts_debug:flat_size(Message),
+    What = io_lib:format("#parallel gen_server instances: ~.4w, "
+                         "message flat size: ~.5w bytes",
+                         [Parallelism, MSize]),
+    Format =
+        lists:flatten(
+          ["~s: "] ++
+              [[atom_to_list(Case),": ~s "] || Case <- Cases]),
+    C = lists:flatten(io_lib:format(Format, [What] ++ Normalized)),
+    {comment, C}.
+
+norm(T, Ref) ->
+    try Ref / T of
+        Norm ->
+            io_lib:format("~.2f", [Norm])
+    catch error:badarith ->
+            "---"
+    end.
+
+-define(MAX_TIME_SECS, 3).   % s
+-define(MAX_TIME, 1000 * ?MAX_TIME_SECS). % ms
+-define(CALLS_PER_LOOP, 5).
+
+do_tests(Test, ParamSet, Config) ->
+    BenchmarkSuite = ?config(benchmark_suite, Config),
+    {Client, ServerMod} = bench(Test),
+    {Parallelism, Message} = bench_params(ParamSet),
+    Fun = create_clients(Message, ServerMod, Client, Parallelism),
+    {TotalLoops, AllPidTime} = run_test(Fun),
+    try ?CALLS_PER_LOOP * round((1000 * TotalLoops) / AllPidTime) of
+        PerSecond ->
+            ct_event:notify(
+              #event{
+                 name = benchmark_data,
+                 data = [{suite,BenchmarkSuite},{value,PerSecond}]}),
+            PerSecond
+    catch error:badarith ->
+            "Time measurement is not working"
+    end.
+
+-define(COUNTER, n).
+
+simple_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = simple_server:reply(P, M),
+    _ = simple_server:reply(P, M),
+    _ = simple_server:reply(P, M),
+    _ = simple_server:reply(P, M),
+    _ = simple_server:reply(P, M),
+    simple_client(N+1, M, P).
+
+simple_client_timer(N, M, P) ->
+    put(?COUNTER, N),
+    _ = simple_server_timer:reply(P, M),
+    _ = simple_server_timer:reply(P, M),
+    _ = simple_server_timer:reply(P, M),
+    _ = simple_server_timer:reply(P, M),
+    _ = simple_server_timer:reply(P, M),
+    simple_client_timer(N+1, M, P).
+
+simple_client_mon(N, M, P) ->
+    put(?COUNTER, N),
+    _ = simple_server_mon:reply(P, M),
+    _ = simple_server_mon:reply(P, M),
+    _ = simple_server_mon:reply(P, M),
+    _ = simple_server_mon:reply(P, M),
+    _ = simple_server_mon:reply(P, M),
+    simple_client_mon(N+1, M, P).
+
+simple_client_timer_mon(N, M, P) ->
+    put(?COUNTER, N),
+    _ = simple_server_timer_mon:reply(P, M),
+    _ = simple_server_timer_mon:reply(P, M),
+    _ = simple_server_timer_mon:reply(P, M),
+    _ = simple_server_timer_mon:reply(P, M),
+    _ = simple_server_timer_mon:reply(P, M),
+    simple_client_timer_mon(N+1, M, P).
+
+generic_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = generic_server:reply(P, M),
+    _ = generic_server:reply(P, M),
+    _ = generic_server:reply(P, M),
+    _ = generic_server:reply(P, M),
+    _ = generic_server:reply(P, M),
+    generic_client(N+1, M, P).
+
+generic_timer_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = generic_server_timer:reply(P, M),
+    _ = generic_server_timer:reply(P, M),
+    _ = generic_server_timer:reply(P, M),
+    _ = generic_server_timer:reply(P, M),
+    _ = generic_server_timer:reply(P, M),
+    generic_timer_client(N+1, M, P).
+
+generic_statem_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    generic_statem_client(N+1, M, P).
+
+generic_statem_transit_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = generic_statem:transit(P, M),
+    _ = generic_statem:transit(P, M),
+    _ = generic_statem:transit(P, M),
+    _ = generic_statem:transit(P, M),
+    _ = generic_statem:transit(P, M),
+    generic_statem_transit_client(N+1, M, P).
+
+generic_statem_complex_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    _ = generic_statem:reply(P, M),
+    generic_statem_complex_client(N+1, M, P).
+
+generic_fsm_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = generic_fsm:reply(P, M),
+    _ = generic_fsm:reply(P, M),
+    _ = generic_fsm:reply(P, M),
+    _ = generic_fsm:reply(P, M),
+    _ = generic_fsm:reply(P, M),
+    generic_fsm_client(N+1, M, P).
+
+generic_fsm_transit_client(N, M, P) ->
+    put(?COUNTER, N),
+    _ = generic_fsm:transit(P, M),
+    _ = generic_fsm:transit(P, M),
+    _ = generic_fsm:transit(P, M),
+    _ = generic_fsm:transit(P, M),
+    _ = generic_fsm:transit(P, M),
+    generic_fsm_transit_client(N+1, M, P).
+
+bench(simple) ->
+    {fun simple_client/3, simple_server};
+bench(simple_timer) ->
+    {fun simple_client_timer/3, simple_server_timer};
+bench(simple_mon) ->
+    {fun simple_client_mon/3, simple_server_mon};
+bench(simple_timer_mon) ->
+    {fun simple_client_timer_mon/3, simple_server_timer_mon};
+bench(generic) ->
+    {fun generic_client/3, generic_server};
+bench(generic_timer) ->
+    {fun generic_timer_client/3, generic_server_timer};
+bench(generic_statem) ->
+    {fun generic_statem_client/3, generic_statem};
+bench(generic_statem_transit) ->
+    {fun generic_statem_transit_client/3, generic_statem};
+bench(generic_statem_complex) ->
+    {fun generic_statem_complex_client/3, generic_statem_complex};
+bench(generic_fsm) ->
+    {fun generic_fsm_client/3, generic_fsm};
+bench(generic_fsm_transit) ->
+    {fun generic_fsm_transit_client/3, generic_fsm}.
+
+%% -> {Parallelism, MessageTerm}
+bench_params(single_small) -> {1, small()};
+bench_params(single_medium) -> {1, medium()};
+bench_params(single_big) -> {1, big()};
+bench_params(sched_small)  -> {parallelism(), small()};
+bench_params(sched_medium)  -> {parallelism(), medium()};
+bench_params(sched_big)  -> {parallelism(), big()};
+bench_params(multi_small)  -> {400, small()};
+bench_params(multi_medium)  -> {400, medium()};
+bench_params(multi_big)  -> {400, big()}.
+
+small() ->
+    small.
+
+medium() ->
+    lists:seq(1, 50).
+
+big() ->
+    lists:seq(1, 1000).
+
+parallelism() ->
+    case erlang:system_info(multi_scheduling) of
+        enabled -> erlang:system_info(schedulers_online);
+        _ -> 1
+    end.
+
+create_clients(M, ServerMod, Client, Parallel) ->
+    fun() ->
+            State = term,
+            ServerPid = ServerMod:start(State),
+            PidRefs = [spawn_monitor(fun() -> Client(0, M, ServerPid) end) ||
+                          _ <- lists:seq(1, Parallel)],
+            timer:sleep(?MAX_TIME),
+            try
+                AllPidsN = collect(PidRefs, []),
+                TotalLoops = lists:sum(AllPidsN),
+                TotalLoops
+            after
+                ok = ServerMod:stop(ServerPid)
+            end
+    end.
+
+collect([], Result) ->
+    Result;
+collect([{Pid, Ref}|PidRefs], Result) ->
+    N = case erlang:process_info(Pid, dictionary) of
+            {dictionary, Dict} ->
+                {?COUNTER, N0} = lists:keyfind(?COUNTER, 1, Dict),
+                N0;
+            undefined -> % Process did not start in ?MAX_TIME_SECS.
+                0
+        end,
+    exit(Pid, kill),
+    receive {'DOWN', Ref, _, _, _} -> ok end,
+    collect(PidRefs, [N|Result]).
+
+run_test(Test) ->
+    {T1, _} = statistics(runtime),
+    Result = Test(),
+    {T2, _} = statistics(runtime),
+    {Result, T2 - T1}.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/generic_fsm.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_fsm.erl
new file mode 100644
index 0000000000..50f7df7a2a
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_fsm.erl
@@ -0,0 +1,59 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017-2018. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(generic_fsm).
+
+-export([start/1, reply/2, transit/2, stop/1]).
+
+-export([init/1, terminate/3]).
+-export([state1/3, state2/3]).
+
+-behaivour(gen_fsm).
+
+
+%% API
+
+start(Data) ->
+    {ok, Pid} = gen_fsm:start(?MODULE, Data, []),
+    Pid.
+
+stop(P) ->
+    ok = gen_fsm:stop(P).
+
+reply(S, M) ->
+    gen_fsm:sync_send_event(S, {reply, M}, infinity).
+
+transit(S, M) ->
+    gen_fsm:sync_send_event(S, {transit, M}, infinity).
+
+%% Implementation
+
+init(Data) ->
+    {ok, state1, Data}.
+
+terminate(_Reason, _State, _Data) ->
+    ok.
+
+state1({reply, M}, _From, Data) ->
+    {reply, M, ?FUNCTION_NAME, Data};
+state1({transit, M}, _From, Data) ->
+    {reply, M, state2, Data}.
+
+state2({transit, M}, _From, Data) ->
+    {reply, M, state1, Data}.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/generic_server.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_server.erl
new file mode 100644
index 0000000000..abd61dcdef
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_server.erl
@@ -0,0 +1,31 @@
+-module(generic_server).
+
+-export([start/1, reply/2, stop/1]).
+
+-export([handle_call/3, handle_cast/2, init/1, terminate/2]).
+
+-behaviour(gen_server).
+
+-define(GEN_SERVER, gen_server).
+
+start(State) ->
+    {ok, Pid} = ?GEN_SERVER:start(?MODULE, State, []),
+    Pid.
+
+init(State) ->
+    {ok, State}.
+
+stop(P) ->
+    ok = ?GEN_SERVER:stop(P).
+
+reply(S, M) ->
+    _M = ?GEN_SERVER:call(S, {reply, M}, infinity).
+
+handle_call({reply, M}, _From, State) ->
+    {reply, M, State}.
+
+handle_cast(_Msg, State) ->
+    {noreply, State}.
+
+terminate(_Reason, _State) ->
+    ok.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/generic_server_timer.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_server_timer.erl
new file mode 100644
index 0000000000..0faa30207d
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_server_timer.erl
@@ -0,0 +1,31 @@
+-module(generic_server_timer).
+
+-export([start/1, reply/2, stop/1]).
+
+-export([handle_call/3, handle_cast/2, init/1, terminate/2]).
+
+-behaviour(gen_server).
+
+-define(GEN_SERVER, gen_server).
+
+start(State) ->
+    {ok, Pid} = ?GEN_SERVER:start(?MODULE, State, []),
+    Pid.
+
+init(State) ->
+    {ok, State}.
+
+stop(P) ->
+    ok = ?GEN_SERVER:stop(P).
+
+reply(S, M) ->
+    ?GEN_SERVER:call(S, {reply, M}).
+
+handle_call({reply, M}, _From, State) ->
+    {reply, M, State}.
+
+handle_cast(_Msg, State) ->
+    {noreply, State}.
+
+terminate(_Reason, _State) ->
+    ok.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/generic_statem.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_statem.erl
new file mode 100644
index 0000000000..2e0491f060
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_statem.erl
@@ -0,0 +1,58 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017-2018. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(generic_statem).
+
+-export([start/1, reply/2, transit/2, stop/1]).
+
+-export([callback_mode/0, init/1]).
+-export([state1/3, state2/3]).
+
+-behaviour(gen_statem).
+
+%% API
+
+start(Data) ->
+    {ok, Pid} = gen_statem:start(?MODULE, Data, []),
+    Pid.
+
+stop(P) ->
+    ok = gen_statem:stop(P).
+
+reply(S, M) ->
+    gen_statem:call(S, {reply, M}, infinity).
+
+transit(S, M) ->
+    gen_statem:call(S, {transit, M}, infinity).
+
+%% Implementation
+
+callback_mode() ->
+    state_functions.
+
+init(Data) ->
+    {ok, state1, Data}.
+
+state1({call, From}, {reply, M}, Data) ->
+    {keep_state, Data, {reply, From, M}};
+state1({call, From}, {transit, M}, Data) ->
+    {next_state, state2, Data, {reply, From, M}}.
+
+state2({call, From}, {transit, M}, Data) ->
+    {next_state, state1, Data, {reply, From, M}}.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/generic_statem_complex.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_statem_complex.erl
new file mode 100644
index 0000000000..983227d281
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/generic_statem_complex.erl
@@ -0,0 +1,66 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017-2018. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(generic_statem_complex).
+
+-export([start/1, reply/2, stop/1]).
+
+-export([callback_mode/0, init/1]).
+-export([state1/3, state2/3, state3/3]).
+
+-behaviour(gen_statem).
+
+%% API
+
+start(Data) ->
+    {ok, Pid} = gen_statem:start(?MODULE, Data, []),
+    Pid.
+
+stop(P) ->
+    ok = gen_statem:stop(P).
+
+reply(S, M) ->
+    gen_statem:call(S, {reply, M}, infinity).
+
+%% Implementation
+
+callback_mode() ->
+    [state_functions,state_enter].
+
+init(Data) ->
+    {ok, state1, Data}.
+
+state1(enter, _, Data) ->
+    {keep_state, Data,
+     {state_timeout, 5000, t1}};
+state1({call, _From}, {reply, _M}, Data) ->
+    {next_state, state2, Data,
+     [postpone,{next_event,internal,e}]}.
+
+state2(enter, _, _Data) ->
+    keep_state_and_data;
+state2(internal, e, Data) ->
+    {next_state, state3, Data}.
+
+state3(enter, _, Data) ->
+    {keep_state, Data,
+     {state_timeout, 5000, t3}};
+state3({call, From}, {reply, M}, Data) ->
+    {next_state, state1, Data,
+     {reply, From, M}}.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server.erl
new file mode 100644
index 0000000000..bd43f686e8
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server.erl
@@ -0,0 +1,31 @@
+-module(simple_server).
+
+%% Local process. No timer. No monitor.
+
+-export([start/1, reply/2, stop/1]).
+
+start(State) ->
+    spawn(fun() -> loop(State) end).
+
+stop(P) ->
+    P ! {stop, self()},
+    receive
+        ok ->
+            ok
+    end.
+
+loop(S) ->
+    receive
+        {reply, P, M} ->
+            P ! M,
+            loop(S);
+        {stop, P} ->
+            P ! ok
+    end.
+
+reply(P, M) ->
+    P ! {reply, self(), M},
+    receive
+        M ->
+            M
+    end.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_mon.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_mon.erl
new file mode 100644
index 0000000000..9b5ace5586
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_mon.erl
@@ -0,0 +1,33 @@
+-module(simple_server_mon).
+
+%% Local process. No timer. Monitor.
+
+-export([start/1, reply/2, stop/1]).
+
+start(State) ->
+    spawn(fun() -> loop(State) end).
+
+stop(P) ->
+    P ! {stop, self()},
+    receive
+        ok ->
+            ok
+    end.
+
+loop(S) ->
+    receive
+        {reply, P, Mref, M} ->
+            P ! {ok, Mref, M},
+            loop(S);
+        {stop, P} ->
+            P ! ok
+    end.
+
+reply(P, M) ->
+    Mref = erlang:monitor(process, P),
+    P ! {reply, self(), Mref, M},
+    receive
+        {ok, Mref, M} ->
+            erlang:demonitor(Mref, [flush]),
+            ok
+    end.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_timer.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_timer.erl
new file mode 100644
index 0000000000..82381e1fdf
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_timer.erl
@@ -0,0 +1,33 @@
+-module(simple_server_timer).
+
+%% Local process. Timer. No monitor.
+
+-export([start/1, reply/2, stop/1]).
+
+start(State) ->
+    spawn(fun() -> loop(State) end).
+
+stop(P) ->
+    P ! {stop, self()},
+    receive
+        ok ->
+            ok
+    end.
+
+loop(S) ->
+    receive
+        {reply, P, M} ->
+            P ! M,
+            loop(S);
+        {stop, P} ->
+            P ! ok
+    end.
+
+reply(P, M) ->
+    P ! {reply, self(), M},
+    receive
+        M ->
+            M
+    after 100 ->
+            exit(fel)
+    end.
diff --git a/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_timer_mon.erl b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_timer_mon.erl
new file mode 100644
index 0000000000..6124ca29c2
--- /dev/null
+++ b/lib/stdlib/test/stdlib_bench_SUITE_data/simple_server_timer_mon.erl
@@ -0,0 +1,35 @@
+-module(simple_server_timer_mon).
+
+%% Local process. Timer. Monitor.
+
+-export([start/1, reply/2, stop/1]).
+
+start(State) ->
+    spawn(fun() -> loop(State) end).
+
+stop(P) ->
+    P ! {stop, self()},
+    receive
+        ok ->
+            ok
+    end.
+
+loop(S) ->
+    receive
+        {reply, P, Mref, M} ->
+            P ! {ok, Mref, M},
+            loop(S);
+        {stop, P} ->
+            P ! ok
+    end.
+
+reply(P, M) ->
+    Mref = erlang:monitor(process, P),
+    P ! {reply, self(), Mref, M},
+    receive
+        {ok, Mref,  M} ->
+            erlang:demonitor(Mref, [flush]),
+            ok
+    after 100 ->
+            exit(fel)
+    end.
diff --git a/lib/stdlib/test/string_SUITE.erl b/lib/stdlib/test/string_SUITE.erl
index 05f18ef238..fdff2d24b8 100644
--- a/lib/stdlib/test/string_SUITE.erl
+++ b/lib/stdlib/test/string_SUITE.erl
@@ -48,6 +48,7 @@
 
 %% Run tests when debugging them
 -export([debug/0, time_func/4]).
+-compile([nowarn_deprecated_function]).
 
 suite() ->
     [{ct_hooks,[ts_install_cth]},
@@ -92,14 +93,11 @@ end_per_testcase(_Case, _Config) ->
     ok.
 
 debug() ->
-    Config = [{data_dir, ?MODULE_STRING++"_data"}],
+    Config = [{data_dir, "./" ++ ?MODULE_STRING++"_data"}],
     [io:format("~p:~p~n",[Test,?MODULE:Test(Config)]) ||
         {_,Tests} <- groups(), Test <- Tests].
 
 -define(TEST(B,C,D), test(?LINE,?FUNCTION_NAME,B,C,D, true)).
--define(TEST_EQ(B,C,D),
-        test(?LINE,?FUNCTION_NAME,B,C,D, true),
-        test(?LINE,?FUNCTION_NAME,hd(C),[B|tl(C),D, true)).
 
 -define(TEST_NN(B,C,D),
         test(?LINE,?FUNCTION_NAME,B,C,D, false),
@@ -294,6 +292,7 @@ trim(_) ->
     ?TEST(["..h", ".e", <<"j..">>], [both, ". "], "h.ej"),
     ?TEST(["..h", <<".ejsa"/utf8>>, "n.."], [both, ". "], "h.ejsan"),
     %% Test that it behaves with graphemes (i.e. nfd tests are the hard part)
+    ?TEST([1013,101,778,101,101], [trailing, [101]], [1013,101,778]),
     ?TEST("aaåaa", [both, "a"], "å"),
     ?TEST(["aaa",778,"äöoo"], [both, "ao"], "åäö"),
     ?TEST([<<"aaa">>,778,"äöoo"], [both, "ao"], "åäö"),
@@ -353,6 +352,7 @@ take(_) ->
     ?TEST([<<>>,<<"..">>, " h.ej", <<" ..">>], [Chars, true, leading], {".. ", "h.ej .."}),
     ?TEST(["..h", <<".ejsa"/utf8>>, "n.."], [Chars, true, leading], {"..", "h.ejsan.."}),
     %% Test that it behaves with graphemes (i.e. nfd tests are the hard part)
+    ?TEST([101,778], [[[101, 779]], true], {[101,778], []}),
     ?TEST(["aaee",778,"äöoo"], [[[$e,778]], true, leading], {"aae", [$e,778|"äöoo"]}),
     ?TEST([<<"aae">>,778,"äöoo"], [[[$e,778]],true,leading], {"aa", [$e,778|"äöoo"]}),
     ?TEST([<<"e">>,778,"åäöe", <<778/utf8>>], [[[$e,778]], true, leading], {[], [$e,778]++"åäöe"++[778]}),
@@ -486,6 +486,10 @@ to_float(_) ->
 prefix(_) ->
     ?TEST("", ["a"], nomatch),
     ?TEST("a", [""], "a"),
+    ?TEST("a", [[[]]], "a"),
+    ?TEST("a", [<<>>], "a"),
+    ?TEST("a", [[<<>>]], "a"),
+    ?TEST("a", [[[<<>>]]], "a"),
     ?TEST("b", ["a"], nomatch),
     ?TEST("a", ["a"], ""),
     ?TEST("å", ["a"], nomatch),
@@ -713,29 +717,123 @@ nth_lexeme(_) ->
 
 
 meas(Config) ->
+    Parent = self(),
+    Exec = fun() ->
+                   DataDir0 = proplists:get_value(data_dir, Config),
+                   DataDir = filename:join(lists:droplast(filename:split(DataDir0))),
+                   case proplists:get_value(profile, Config, false) of
+                       false ->
+                           do_measure(DataDir);
+                       eprof ->
+                           eprof:profile(fun() -> do_measure(DataDir) end, [set_on_spawn]),
+                           eprof:stop_profiling(),
+                           eprof:analyze(),
+                           eprof:stop()
+                   end,
+                   Parent ! {test_done, self()},
+                   normal
+           end,
+    ct:timetrap({minutes,2}),
     case ct:get_timetrap_info() of
         {_,{_,Scale}} when Scale > 1 ->
             {skip,{will_not_run_in_debug,Scale}};
-        _ -> % No scaling
-            DataDir = proplists:get_value(data_dir, Config),
-            TestDir = filename:dirname(string:trim(DataDir, trailing, "/")),
-            do_measure(TestDir)
+        _ -> % No scaling, run at most 1.5 min
+            Tester = spawn(Exec),
+            receive {test_done, Tester} -> ok
+            after 90000 ->
+                    io:format("Timelimit reached stopping~n",[]),
+                    exit(Tester, die)
+            end,
+            ok
     end.
 
-do_measure(TestDir) ->
-    File =  filename:join(TestDir, ?MODULE_STRING ++ ".erl"),
+do_measure(DataDir) ->
+    File =  filename:join([DataDir,"unicode_util_SUITE_data","NormalizationTest.txt"]),
     io:format("File ~s ",[File]),
     {ok, Bin} = file:read_file(File),
     io:format("~p~n",[byte_size(Bin)]),
     Do = fun(Name, Func, Mode) ->
-                 {N, Mean, Stddev, _} = time_func(Func, Mode, Bin, 50),
-                 io:format("~10w ~6w ~6.2fms ±~4.2fms #~.2w gc included~n",
+                 {N, Mean, Stddev, _} = time_func(Func, Mode, Bin, 20),
+                 io:format("~15w ~6w ~6.2fms ±~5.2fms #~.2w gc included~n",
                            [Name, Mode, Mean/1000, Stddev/1000, N])
          end,
+    Do2 = fun(Name, Func, Mode) ->
+                  {N, Mean, Stddev, _} = time_func(Func, binary, <<>>, 20),
+                  io:format("~15w ~6w ~6.2fms ±~5.2fms #~.2w gc included~n",
+                            [Name, Mode, Mean/1000, Stddev/1000, N])
+          end,
     io:format("----------------------~n"),
-    Do(tokens, fun(Str) -> string:tokens(Str, [$\n,$\r]) end, list),
+
+    Do(old_tokens, fun(Str) -> string:tokens(Str, [$\n,$\r]) end, list),
     Tokens = {lexemes, fun(Str) -> string:lexemes(Str, [$\n,$\r]) end},
     [Do(Name,Fun,Mode) || {Name,Fun} <- [Tokens], Mode <- [list, binary]],
+
+    S0 = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxy.....",
+    S0B = <<"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxy.....">>,
+    Do2(old_strip_l, repeat(fun() -> string:strip(S0, left, $x) end), list),
+    Do2(trim_l,  repeat(fun() -> string:trim(S0, leading, [$x]) end), list),
+    Do2(trim_l,  repeat(fun() -> string:trim(S0B, leading, [$x]) end), binary),
+    Do2(old_strip_r, repeat(fun() -> string:strip(S0, right, $.) end), list),
+    Do2(trim_t,  repeat(fun() -> string:trim(S0, trailing, [$.]) end), list),
+    Do2(trim_t,  repeat(fun() -> string:trim(S0B, trailing, [$.]) end), binary),
+
+    Do2(old_chr_sub, repeat(fun() -> string:sub_string(S0, string:chr(S0, $.)) end), list),
+    Do2(old_str_sub, repeat(fun() -> string:sub_string(S0, string:str(S0, [$.])) end), list),
+    Do2(find, repeat(fun() -> string:find(S0, [$.]) end), list),
+    Do2(find, repeat(fun() -> string:find(S0B, [$.]) end), binary),
+    Do2(old_str_sub2, repeat(fun() -> N = string:str(S0, "xy.."),
+                        {string:sub_string(S0,1,N), string:sub_string(S0,N+4)} end), list),
+    Do2(split, repeat(fun() -> string:split(S0, "xy..") end), list),
+    Do2(split, repeat(fun() -> string:split(S0B, "xy..") end), binary),
+
+    Do2(old_rstr_sub, repeat(fun() -> string:sub_string(S0, string:rstr(S0, [$y])) end), list),
+    Do2(find_t, repeat(fun() -> string:find(S0, [$y], trailing) end), list),
+    Do2(find_t, repeat(fun() -> string:find(S0B, [$y], trailing) end), binary),
+    Do2(old_rstr_sub2, repeat(fun() -> N = string:rstr(S0, "y.."),
+                         {string:sub_string(S0,1,N), string:sub_string(S0,N+3)} end), list),
+    Do2(split_t, repeat(fun() -> string:split(S0, "y..", trailing) end), list),
+    Do2(split_t, repeat(fun() -> string:split(S0B, "y..", trailing) end), binary),
+
+    Do2(old_span, repeat(fun() -> N=string:span(S0, [$x, $y]),
+                                  {string:sub_string(S0,1,N),string:sub_string(S0,N+1)}
+                         end), list),
+    Do2(take, repeat(fun() -> string:take(S0, [$x, $y]) end), list),
+    Do2(take, repeat(fun() -> string:take(S0B, [$x, $y]) end), binary),
+
+    Do2(old_cspan, repeat(fun() -> N=string:cspan(S0, [$.,$y]),
+                                   {string:sub_string(S0,1,N),string:sub_string(S0,N+1)}
+                          end), list),
+    Do2(take_c, repeat(fun() -> string:take(S0, [$.,$y], true) end), list),
+    Do2(take_c, repeat(fun() -> string:take(S0B, [$.,$y], true) end), binary),
+
+    Do2(old_substr, repeat(fun() -> string:substr(S0, 21, 15) end), list),
+    Do2(slice, repeat(fun() -> string:slice(S0, 20, 15) end), list),
+    Do2(slice, repeat(fun() -> string:slice(S0B, 20, 15) end), binary),
+
+    io:format("--~n",[]),
+    NthTokens = {nth_lexemes, fun(Str) -> string:nth_lexeme(Str, 18000, [$\n,$\r]) end},
+    [Do(Name,Fun,Mode) || {Name,Fun} <- [NthTokens], Mode <- [list, binary]],
+    Do2(take_t, repeat(fun() -> string:take(S0, [$.,$y], false, trailing) end), list),
+    Do2(take_t, repeat(fun() -> string:take(S0B, [$.,$y], false, trailing) end), binary),
+    Do2(take_tc, repeat(fun() -> string:take(S0, [$x], true, trailing) end), list),
+    Do2(take_tc, repeat(fun() -> string:take(S0B, [$x], true, trailing) end), binary),
+
+    Length = {length, fun(Str) -> string:length(Str) end},
+    [Do(Name,Fun,Mode) || {Name,Fun} <- [Length], Mode <- [list, binary]],
+
+    Reverse = {reverse, fun(Str) -> string:reverse(Str) end},
+    [Do(Name,Fun,Mode) || {Name,Fun} <- [Reverse], Mode <- [list, binary]],
+
+    ok.
+
+repeat(F) ->
+    fun(_) -> repeat_1(F,20000) end.
+
+repeat_1(F, N) when N > 0 ->
+    F(),
+    repeat_1(F, N-1);
+repeat_1(_, _) ->
+    erlang:garbage_collect(),
     ok.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -783,9 +881,9 @@ test_1(Line, Func, Str, Args, Exp) ->
     catch
         error:Exp ->
             ok;
-        error:Reason ->
+        error:Reason:Stacktrace ->
             io:format("~p:~p: Crash ~p ~p~n",
-                      [?MODULE,Line, Reason, erlang:get_stacktrace()]),
+                      [?MODULE,Line, Reason, Stacktrace]),
             exit({error, Func})
     end.
 
@@ -850,10 +948,10 @@ check_types(Line, Func, [Str|_], Res)  ->
             io:format("Failed: ~p ~p: ~p ~p~n",[Line, Func, T1, T2]),
             io:format("  ~p  => ~p~n", [Str, Res]),
             error;
-          _:Reason ->
-            io:format("Crash: ~p in~n ~p~n",[Reason, erlang:get_stacktrace()]),
+          _:Reason:Stacktrace ->
+            io:format("Crash: ~p in~n ~p~n",[Reason, Stacktrace]),
             io:format("Failed: ~p ~p: ~p => ~p~n", [Line, Func, Str, Res]),
-            exit({Reason, erlang:get_stacktrace()})
+            exit({Reason, Stacktrace})
     end.
 
 check_types_1(T, T) ->
@@ -865,8 +963,6 @@ check_types_1({list, _},{list, undefined}) ->
     ok;
 check_types_1({list, _},{list, codepoints}) ->
     ok;
-check_types_1({list, _},{list, {list, codepoints}}) ->
-    ok;
 check_types_1({list, {list, _}},{list, {list, codepoints}}) ->
     ok;
 check_types_1(mixed,_) ->
diff --git a/lib/stdlib/test/supervisor_1.erl b/lib/stdlib/test/supervisor_1.erl
index 419026749b..c3ccacc587 100644
--- a/lib/stdlib/test/supervisor_1.erl
+++ b/lib/stdlib/test/supervisor_1.erl
@@ -42,6 +42,8 @@ start_child(error) ->
 	set -> gen_server:start_link(?MODULE, error, [])
     end;
 
+start_child({return, Term}) ->
+    Term;
 
 start_child(Extra) ->
     {ok, Pid} = gen_server:start_link(?MODULE, normal, []),
diff --git a/lib/stdlib/test/supervisor_SUITE.erl b/lib/stdlib/test/supervisor_SUITE.erl
index cd2c6b0cbb..761df8eb40 100644
--- a/lib/stdlib/test/supervisor_SUITE.erl
+++ b/lib/stdlib/test/supervisor_SUITE.erl
@@ -39,6 +39,9 @@
 	  sup_start_ignore_temporary_child_start_child_simple/1,
           sup_start_ignore_permanent_child_start_child_simple/1,
 	  sup_start_error_return/1, sup_start_fail/1,
+          sup_start_child_returns_error/1,
+          sup_start_restart_child_returns_error/1,
+          sup_start_child_returns_error_simple/1,
 	  sup_start_map/1, sup_start_map_simple/1,
 	  sup_start_map_faulty_specs/1,
 	  sup_stop_infinity/1, sup_stop_timeout/1, sup_stop_brutal_kill/1,
@@ -65,14 +68,16 @@
 	  simple_one_for_one_extra/1, simple_one_for_one_shutdown/1]).
 
 %% Misc tests
--export([child_unlink/1, tree/1, count_children/1,
+-export([child_unlink/1, tree/1, count_children/1, count_children_supervisor/1,
 	 count_restarting_children/1, get_callback_module/1,
 	 do_not_save_start_parameters_for_temporary_children/1,
 	 do_not_save_child_specs_for_temporary_children/1,
 	 simple_one_for_one_scale_many_temporary_children/1,
          simple_global_supervisor/1, hanging_restart_loop/1,
+	 hanging_restart_loop_rest_for_one/1,
 	 hanging_restart_loop_simple/1, code_change/1, code_change_map/1,
-	 code_change_simple/1, code_change_simple_map/1]).
+	 code_change_simple/1, code_change_simple_map/1,
+         order_of_children/1, scale_start_stop_many_children/1]).
 
 %%-------------------------------------------------------------------------
 
@@ -91,12 +96,15 @@ all() ->
      {group, normal_termination},
      {group, shutdown_termination},
      {group, abnormal_termination}, child_unlink, tree,
-     count_children, count_restarting_children, get_callback_module,
+     count_children, count_children_supervisor, count_restarting_children,
+     get_callback_module,
      do_not_save_start_parameters_for_temporary_children,
      do_not_save_child_specs_for_temporary_children,
      simple_one_for_one_scale_many_temporary_children, temporary_bystander,
-     simple_global_supervisor, hanging_restart_loop, hanging_restart_loop_simple,
-     code_change, code_change_map, code_change_simple, code_change_simple_map].
+     simple_global_supervisor, hanging_restart_loop,
+     hanging_restart_loop_rest_for_one, hanging_restart_loop_simple,
+     code_change, code_change_map, code_change_simple, code_change_simple_map,
+     order_of_children, scale_start_stop_many_children].
 
 groups() -> 
     [{sup_start, [],
@@ -105,7 +113,10 @@ groups() ->
        sup_start_ignore_temporary_child_start_child,
        sup_start_ignore_temporary_child_start_child_simple,
        sup_start_ignore_permanent_child_start_child_simple,
-       sup_start_error_return, sup_start_fail]},
+       sup_start_error_return, sup_start_fail,
+       sup_start_child_returns_error, sup_start_restart_child_returns_error,
+       sup_start_child_returns_error_simple
+      ]},
      {sup_start_map, [],
       [sup_start_map, sup_start_map_simple, sup_start_map_faulty_specs]},
      {sup_stop, [],
@@ -147,6 +158,15 @@ init_per_testcase(_Case, Config) ->
     Config.
 
 end_per_testcase(_Case, _Config) ->
+    %% Clean up to avoid unnecessary error reports in the shell
+    case whereis(sup_test) of
+        SupPid when is_pid(SupPid) ->
+            unlink(SupPid),
+            exit(SupPid,shutdown),
+            ok;
+        _ ->
+            error
+    end,
     ok.
 
 start_link(InitResult) ->
@@ -274,6 +294,7 @@ sup_start_ignore_permanent_child_start_child_simple(Config)
     %% Regression test: check that the supervisor terminates without error.
     exit(Pid, shutdown),
     check_exit_reason(Pid, shutdown).
+
 %%-------------------------------------------------------------------------
 %% Tests what happens if init-callback returns a invalid value.
 sup_start_error_return(Config) when is_list(Config) ->
@@ -289,6 +310,53 @@ sup_start_fail(Config) when is_list(Config) ->
     check_exit_reason(Term).
 
 %%-------------------------------------------------------------------------
+%% Test what happens when the start function for a child returns
+%% {error,Reason} or some other term().
+sup_start_restart_child_returns_error(_Config) ->
+    process_flag(trap_exit, true),
+    Child = {child1, {supervisor_1, start_child, [error]},
+              permanent, 1000, worker, []},
+    {ok, _Pid}  = start_link({ok, {{one_for_one, 2, 3600}, [Child]}}),
+
+    ok = supervisor:terminate_child(sup_test, child1),
+    {error,{function_clause,_}} = supervisor:restart_child(sup_test,child1),
+
+    [{child1,undefined,worker,[]}] = supervisor:which_children(sup_test),
+    ok.
+
+%%-------------------------------------------------------------------------
+%% Test what happens when the start function for a child returns
+%% {error,Reason} or some other term().
+sup_start_child_returns_error(_Config) ->
+    process_flag(trap_exit, true),
+    Child1 = {child1, {supervisor_1, start_child, [{return,{error,reason}}]},
+              permanent, 1000, worker, []},
+    Child2 = {child2, {supervisor_1, start_child, [{return,error_reason}]},
+              permanent, 1000, worker, []},
+    {ok, _Pid}  = start_link({ok, {{one_for_one, 2, 3600}, []}}),
+
+    {error,{reason,_}} = supervisor:start_child(sup_test,Child1),
+    {error,{error_reason,_}} = supervisor:start_child(sup_test,Child2),
+
+    [] = supervisor:which_children(sup_test),
+    ok.
+
+%%-------------------------------------------------------------------------
+%% Test what happens when the start function for a child returns
+%% {error,Reason} - simple_one_for_one
+sup_start_child_returns_error_simple(_Config) ->
+    process_flag(trap_exit, true),
+    Child = {child1, {supervisor_1, start_child, []},
+             permanent, 1000, worker, []},
+    {ok, _Pid}  = start_link({ok, {{simple_one_for_one, 2, 3600}, [Child]}}),
+
+    {error,reason} = supervisor:start_child(sup_test,[{return,{error,reason}}]),
+    {error,error_reason} = supervisor:start_child(sup_test,[{return,error_reason}]),
+
+    [] = supervisor:which_children(sup_test),
+    ok.
+
+%%-------------------------------------------------------------------------
 %% Tests that the supervisor process starts correctly with map
 %% startspec, and that the full childspec can be read.
 sup_start_map(Config) when is_list(Config) ->
@@ -468,7 +536,16 @@ extra_return(Config) when is_list(Config) ->
     [{child1, CPid3, worker, []}] = supervisor:which_children(sup_test),
     [1,1,0,1] = get_child_counts(sup_test),
 
-    ok.
+    %% Check that it can be automatically restarted
+    terminate(CPid3, abnormal),
+    [{child1, CPid4, worker, []}] = supervisor:which_children(sup_test),
+    [1,1,0,1] = get_child_counts(sup_test),
+    if (not is_pid(CPid4)) orelse CPid4=:=CPid3 ->
+            ct:fail({not_restarted,CPid3,CPid4});
+       true ->
+            ok
+    end.
+
 %%-------------------------------------------------------------------------
 %% Test API functions start_child/2, terminate_child/2, delete_child/2
 %% restart_child/2, which_children/1, count_children/1. Only correct
@@ -1140,7 +1217,7 @@ simple_one_for_one(Config) when is_list(Config) ->
     [{Id4, Pid4, _, _}|_] = supervisor:which_children(sup_test),
 
     terminate(SupPid, Pid4, Id4, abnormal),
-    check_exit([SupPid]).
+    check_exit_reason(SupPid,shutdown).
 
 
 %%-------------------------------------------------------------------------
@@ -1378,6 +1455,11 @@ tree(Config) when is_list(Config) ->
 		  [?MODULE, {ok, {{one_for_one, 4, 3600}, []}}]},
 		 permanent, infinity,
 		 supervisor, []},
+    ChildSup3 = {supchild3,
+		 {supervisor, start_link,
+		  [?MODULE, {ok, {{one_for_one, 4, 3600}, []}}]},
+		 transient, infinity,
+		 supervisor, []},
 
     %% Top supervisor
     {ok, SupPid} = start_link({ok, {{one_for_all, 4, 3600}, []}}),
@@ -1385,7 +1467,9 @@ tree(Config) when is_list(Config) ->
     %% Child supervisors  
     {ok, Sup1} = supervisor:start_child(SupPid, ChildSup1),
     {ok, Sup2} = supervisor:start_child(SupPid, ChildSup2),
-    [2,2,2,0] = get_child_counts(SupPid),
+    {ok, _Sup3} = supervisor:start_child(SupPid, ChildSup3),
+    ok = supervisor:terminate_child(SupPid, supchild3),
+    [3,2,3,0] = get_child_counts(SupPid),
 
     %% Workers
     [{_, CPid2, _, _},{_, CPid1, _, _}] =
@@ -1417,16 +1501,21 @@ tree(Config) when is_list(Config) ->
 
     timer:sleep(1000),
 
-    [{supchild2, NewSup2, _, _},{supchild1, NewSup1, _, _}] =
+    [{supchild3, NewSup3, _, _},
+     {supchild2, NewSup2, _, _},
+     {supchild1, NewSup1, _, _}] =
 	supervisor:which_children(SupPid),
-    [2,2,2,0] = get_child_counts(SupPid),
+    [3,3,3,0] = get_child_counts(SupPid),
 
     [{child2, _, _, _},{child1, _, _, _}]  =
 	supervisor:which_children(NewSup1),
     [2,2,0,2] = get_child_counts(NewSup1),
 
     [] = supervisor:which_children(NewSup2),
-    [0,0,0,0] = get_child_counts(NewSup2).
+    [0,0,0,0] = get_child_counts(NewSup2),
+
+    [] = supervisor:which_children(NewSup3),
+    [0,0,0,0] = get_child_counts(NewSup3).
 
 %%-------------------------------------------------------------------------
 %% Test count_children
@@ -1459,6 +1548,36 @@ count_children(Config) when is_list(Config) ->
     [1,0,0,0] = get_child_counts(sup_test).
 
 %%-------------------------------------------------------------------------
+%% Test count_children for simple_one_for_one, when children are supervisors
+count_children_supervisor(Config) when is_list(Config) ->
+    process_flag(trap_exit, true),
+    Child = {child, {supervisor_1, start_child, []}, temporary, infinity,
+	     supervisor, []},
+    {ok, SupPid} = start_link({ok, {{simple_one_for_one, 2, 3600}, [Child]}}),
+    [supervisor:start_child(sup_test, []) || _Ignore <- lists:seq(1,1000)],
+
+    Children = supervisor:which_children(sup_test),
+    ChildCount = get_child_counts(sup_test),
+
+    [supervisor:start_child(sup_test, []) || _Ignore2 <- lists:seq(1,1000)],
+
+    ChildCount2 = get_child_counts(sup_test),
+    Children2 = supervisor:which_children(sup_test),
+
+    ChildCount3 = get_child_counts(sup_test),
+    Children3 = supervisor:which_children(sup_test),
+
+    1000 = length(Children),
+    [1,1000,1000,0] = ChildCount,
+    2000 = length(Children2),
+    [1,2000,2000,0] = ChildCount2,
+    Children3 = Children2,
+    ChildCount3 = ChildCount2,
+
+    [terminate(SupPid, Pid, child, kill) || {undefined, Pid, supervisor, _Modules} <- Children3],
+    [1,0,0,0] = get_child_counts(sup_test).
+
+%%-------------------------------------------------------------------------
 %% Test count_children when some children are restarting
 count_restarting_children(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
@@ -1577,11 +1696,11 @@ dont_save_start_parameters_for_temporary_children(simple_one_for_one = Type) ->
     start_children(Sup2, [LargeList], 100),
     start_children(Sup3, [LargeList], 100),
 
-    [{memory,Mem1}] = process_info(Sup1, [memory]),
-    [{memory,Mem2}] = process_info(Sup2, [memory]),
-    [{memory,Mem3}] = process_info(Sup3, [memory]),
+    Size1 = erts_debug:flat_size(sys:get_status(Sup1)),
+    Size2 = erts_debug:flat_size(sys:get_status(Sup2)),
+    Size3 = erts_debug:flat_size(sys:get_status(Sup3)),
 
-    true = (Mem3 < Mem1)  and  (Mem3 < Mem2),
+    true = (Size3 < Size1)  and  (Size3 < Size2),
 
     terminate(Sup1, shutdown),
     terminate(Sup2, shutdown),
@@ -1605,11 +1724,11 @@ dont_save_start_parameters_for_temporary_children(Type) ->
     start_children(Sup2, Transient, 100),
     start_children(Sup3, Temporary, 100),
 
-    [{memory,Mem1}] = process_info(Sup1, [memory]),
-    [{memory,Mem2}] = process_info(Sup2, [memory]),
-    [{memory,Mem3}] = process_info(Sup3, [memory]),
+    Size1 = erts_debug:flat_size(sys:get_status(Sup1)),
+    Size2 = erts_debug:flat_size(sys:get_status(Sup2)),
+    Size3 = erts_debug:flat_size(sys:get_status(Sup3)),
 
-    true = (Mem3 < Mem1)  and  (Mem3 < Mem2),
+    true = (Size3 < Size1)  and  (Size3 < Size2),
 
     terminate(Sup1, shutdown),
     terminate(Sup2, shutdown),
@@ -1847,6 +1966,61 @@ hanging_restart_loop(Config) when is_list(Config) ->
     undefined = whereis(sup_test),
     ok.
 
+hanging_restart_loop_rest_for_one(Config) when is_list(Config) ->
+    process_flag(trap_exit, true),
+    {ok, Pid} = start_link({ok, {{rest_for_one, 8, 10}, []}}),
+    Child1 = {child1, {supervisor_1, start_child, []},
+	      permanent, brutal_kill, worker, []},
+    Child2 = {child2, {supervisor_deadlock, start_child, []},
+	      permanent, brutal_kill, worker, []},
+    Child3 = {child3, {supervisor_1, start_child, []},
+	      permanent, brutal_kill, worker, []},
+
+    %% Ets table with state read by supervisor_deadlock.erl
+    ets:new(supervisor_deadlock,[set,named_table,public]),
+    ets:insert(supervisor_deadlock,{fail_start,false}),
+
+    {ok, CPid1} = supervisor:start_child(sup_test, Child1),
+    {ok, CPid2} = supervisor:start_child(sup_test, Child2),
+    link(CPid2),
+    {ok, _CPid3} = supervisor:start_child(sup_test, Child3),
+
+    ets:insert(supervisor_deadlock,{fail_start,true}),
+    supervisor_deadlock:restart_child(),
+    timer:sleep(2000), % allow restart to happen before proceeding
+
+    {error, already_present} = supervisor:start_child(sup_test, Child2),
+    {error, restarting} = supervisor:restart_child(sup_test, child2),
+    {error, restarting} = supervisor:delete_child(sup_test, child2),
+    [{child3,undefined,worker,[]},
+     {child2,restarting,worker,[]},
+     {child1,CPid1,worker,[]}] = supervisor:which_children(sup_test),
+    [3,1,0,3] = get_child_counts(sup_test),
+
+    ok = supervisor:terminate_child(sup_test, child2),
+    check_exit_reason(CPid2, error),
+    [{child3,undefined,worker,[]},
+     {child2,undefined,worker,[]},
+     {child1,CPid1,worker,[]}] = supervisor:which_children(sup_test),
+
+    ets:insert(supervisor_deadlock,{fail_start,false}),
+    {ok, CPid22} = supervisor:restart_child(sup_test, child2),
+    link(CPid22),
+
+    ets:insert(supervisor_deadlock,{fail_start,true}),
+    supervisor_deadlock:restart_child(),
+    timer:sleep(2000), % allow restart to happen before proceeding
+
+    %% Terminating supervisor.
+    %% OTP-9549 fixes so this does not give a timetrap timeout -
+    %% i.e. that supervisor does not hang in restart loop.
+    terminate(Pid,shutdown),
+
+    %% Check that child died with reason from 'restart' request above
+    check_exit_reason(CPid22, error),
+    undefined = whereis(sup_test),
+    ok.
+
 %%-------------------------------------------------------------------------
 %% Test that child and supervisor can be shutdown while hanging in
 %% restart loop, simple_one_for_one.
@@ -2022,11 +2196,11 @@ code_change_simple(_Config) ->
     SimpleChild2 = {child2,{supervisor_1, start_child, []}, permanent,
 		    brutal_kill, worker, []},
 
-    {error, {error, {ok,[_,_]}}} =
+    {error, {error, {ok,{[_,_],_}}}} =
 	fake_upgrade(SimplePid,{ok,{SimpleFlags,[SimpleChild1,SimpleChild2]}}),
 
     %% Attempt to remove child
-    {error, {error, {ok,[]}}} = fake_upgrade(SimplePid,{ok,{SimpleFlags,[]}}),
+    {error, {error, {ok,{[],_}}}} = fake_upgrade(SimplePid,{ok,{SimpleFlags,[]}}),
 
     terminate(SimplePid,shutdown),
     ok.
@@ -2047,11 +2221,11 @@ code_change_simple_map(_Config) ->
     %% Attempt to add child
     SimpleChild2 = #{id=>child2,
 		     start=>{supervisor_1, start_child, []}},
-    {error, {error, {ok, [_,_]}}} =
+    {error, {error, {ok, {[_,_],_}}}} =
 	fake_upgrade(SimplePid,{ok,{SimpleFlags,[SimpleChild1,SimpleChild2]}}),
 
     %% Attempt to remove child
-    {error, {error, {ok, []}}} =
+    {error, {error, {ok, {[],_}}}} =
 	fake_upgrade(SimplePid,{ok,{SimpleFlags,[]}}),
 
     terminate(SimplePid,shutdown),
@@ -2075,6 +2249,148 @@ fake_upgrade(Pid,NewInitReturn) ->
     ok = sys:resume(Pid),
     R.
 
+%% Test that children are started in the order they are given, and
+%% terminated in the opposite order
+order_of_children(_Config) ->
+    process_flag(trap_exit, true),
+    %% Use child ids that are not alphabetically storted
+    Id1 = ch7,
+    Id2 = ch3,
+    Id3 = ch10,
+    Id4 = ch2,
+    Id5 = ch5,
+    Children =
+        [{Id, {supervisor_1, start_child, []}, permanent, 1000, worker, []} ||
+            Id <- [Id1,Id2,Id3,Id4,Id5]],
+
+    {ok, SupPid}  = start_link({ok, {{rest_for_one, 2, 3600}, Children}}),
+
+
+    %% Check start order (pids are growing)
+    Which1 = supervisor:which_children(sup_test),
+    IsPid = fun({_,P,_,_}) when is_pid(P) -> true; (_) -> false end,
+    true = lists:all(IsPid,Which1),
+    SortedOnPid1 = lists:keysort(2,Which1),
+    [{Id1,Pid1,_,_},
+     {Id2,Pid2,_,_},
+     {Id3,Pid3,_,_},
+     {Id4,Pid4,_,_},
+     {Id5,Pid5,_,_}] = SortedOnPid1,
+
+    TPid = self(),
+    TraceHandler = fun({trace,P,exit,_},{Last,Ps}) when P=:=Last ->
+                           TPid ! {exited,lists:reverse([P|Ps])},
+                           {Last,Ps};
+                      ({trace,P,exit,_},{Last,Ps}) ->
+                           {Last,[P|Ps]};
+                      (_T,Acc) ->
+                           Acc
+                   end,
+
+    %% Terminate Pid3 and check that Pid4 and Pid5 are terminated in
+    %% expected order.
+    Expected1 = [Pid5,Pid4],
+    {ok,_} = dbg:tracer(process,{TraceHandler,{Pid4,[]}}),
+    [{ok,[_]} = dbg:p(P,procs) || P <- Expected1],
+    terminate(Pid3, abnormal),
+    receive {exited,ExitedPids1} ->
+            dbg:stop_clear(),
+            case ExitedPids1 of
+                Expected1 -> ok;
+                _ -> ct:fail({faulty_termination_order,
+                              {expected,Expected1},
+                              {got,ExitedPids1}})
+            end
+    after 3000 ->
+            dbg:stop_clear(),
+            ct:fail({shutdown_fail,timeout})
+    end,
+
+    %% Then check that Id3-5 are started again in correct order
+    Which2 = supervisor:which_children(sup_test),
+    true = lists:all(IsPid,Which2),
+    SortedOnPid2 = lists:keysort(2,Which2),
+    [{Id1,Pid1,_,_},
+     {Id2,Pid2,_,_},
+     {Id3,Pid32,_,_},
+     {Id4,Pid42,_,_},
+     {Id5,Pid52,_,_}] = SortedOnPid2,
+
+    %% Terminate supervisor and check that all children are terminated
+    %% in opposite start order
+    Expected2 = [Pid52,Pid42,Pid32,Pid2,Pid1],
+    {ok,_} = dbg:tracer(process,{TraceHandler,{Pid1,[]}}),
+    [{ok,[_]} = dbg:p(P,procs) || P <- Expected2],
+    exit(SupPid,shutdown),
+    receive {exited,ExitedPids2} ->
+            dbg:stop_clear(),
+            case ExitedPids2 of
+                Expected2 -> ok;
+                _ -> ct:fail({faulty_termination_order,
+                              {expected,Expected2},
+                              {got,ExitedPids2}})
+            end
+    after 3000 ->
+            dbg:stop_clear(),
+            ct:fail({shutdown_fail,timeout})
+    end,
+    ok.
+
+%% Test that a non-simple supervisor scales well for starting and
+%% stopping many children.
+scale_start_stop_many_children(_Config) ->
+    process_flag(trap_exit, true),
+    {ok, _Pid}  = start_link({ok, {{one_for_one, 2, 3600}, []}}),
+    N1 = 1000,
+    N2 = 100000,
+    Ids1 = lists:seq(1,N1),
+    Ids2 = lists:seq(1,N2),
+    Children1 = [{Id,{supervisor_1,start_child,[]},permanent,1000,worker,[]} ||
+                    Id <- Ids1],
+    Children2 = [{Id,{supervisor_1,start_child,[]},permanent,1000,worker,[]} ||
+                    Id <- Ids2],
+
+    {StartT1,_} =
+        timer:tc(fun() ->
+                         [supervisor:start_child(sup_test,C) || C <- Children1]
+                 end),
+    {StopT1,_} =
+        timer:tc(fun() ->
+                         [supervisor:terminate_child(sup_test,I) || I <- Ids1]
+                 end),
+    ct:log("~w children, start time: ~w ms, stop time: ~w ms",
+           [N1, StartT1 div 1000, StopT1 div 1000]),
+
+    {StartT2,_} =
+        timer:tc(fun() ->
+                         [supervisor:start_child(sup_test,C) || C <- Children2]
+                 end),
+    {StopT2,_} =
+        timer:tc(fun() ->
+                         [supervisor:terminate_child(sup_test,I) || I <- Ids2]
+                 end),
+    ct:log("~w children, start time: ~w ms, stop time: ~w ms",
+           [N2, StartT2 div 1000, StopT2 div 1000]),
+
+    %% Scaling should be more or less linear, but allowing a bit more
+    %% to avoid false alarms
+    ScaleLimit = (N2 div N1) * 10,
+    StartScale = StartT2 div StartT1,
+    StopScale = StopT2 div StopT1,
+
+    ct:log("Scale limit: ~w~nStart scale: ~w~nStop scale: ~w",
+           [ScaleLimit, StartScale, StopScale]),
+
+    if StartScale > ScaleLimit ->
+            ct:fail({bad_start_scale,StartScale});
+       StopScale > ScaleLimit ->
+            ct:fail({bad_stop_scale,StopScale});
+       true ->
+            ok
+    end,
+
+    ok.
+
 %%-------------------------------------------------------------------------
 terminate(Pid, Reason) when Reason =/= supervisor ->
     terminate(dummy, Pid, dummy, Reason).
diff --git a/lib/stdlib/test/supervisor_deadlock.erl b/lib/stdlib/test/supervisor_deadlock.erl
index 8d3d1c6f30..f51aecccb2 100644
--- a/lib/stdlib/test/supervisor_deadlock.erl
+++ b/lib/stdlib/test/supervisor_deadlock.erl
@@ -1,5 +1,5 @@
 -module(supervisor_deadlock).
--compile(export_all).
+-compile([export_all,nowarn_export_all]).
 
 
 %%%-----------------------------------------------------------------
diff --git a/lib/stdlib/test/tar_SUITE.erl b/lib/stdlib/test/tar_SUITE.erl
index 4061008812..32a33283d1 100644
--- a/lib/stdlib/test/tar_SUITE.erl
+++ b/lib/stdlib/test/tar_SUITE.erl
@@ -28,7 +28,7 @@
 	 extract_from_open_file/1, symlinks/1, open_add_close/1, cooked_compressed/1,
 	 memory/1,unicode/1,read_other_implementations/1,
          sparse/1, init/1, leading_slash/1, dotdot/1,
-         roundtrip_metadata/1]).
+         roundtrip_metadata/1, apply_file_info_opts/1]).
 
 -include_lib("common_test/include/ct.hrl").
 -include_lib("kernel/include/file.hrl").
@@ -42,7 +42,8 @@ all() ->
      extract_filtered,
      symlinks, open_add_close, cooked_compressed, memory, unicode,
      read_other_implementations,
-     sparse,init,leading_slash,dotdot,roundtrip_metadata].
+     sparse,init,leading_slash,dotdot,roundtrip_metadata,
+     apply_file_info_opts].
 
 groups() -> 
     [].
@@ -989,6 +990,31 @@ do_roundtrip_metadata(Dir, File) ->
             ok
     end.
 
+apply_file_info_opts(Config) when is_list(Config) ->
+    ok = file:set_cwd(proplists:get_value(priv_dir, Config)),
+
+    ok = file:make_dir("empty_directory"),
+    ok = file:write_file("file", "contents"),
+
+    Opts = [{atime, 0}, {mtime, 0}, {ctime, 0}, {uid, 0}, {gid, 0}],
+    TarFile = "reproducible.tar",
+    {ok, Tar} = erl_tar:open(TarFile, [write]),
+    ok = erl_tar:add(Tar, "file", Opts),
+    ok = erl_tar:add(Tar, "empty_directory", Opts),
+    ok = erl_tar:add(Tar, <<"contents">>, "memory_file", Opts),
+    erl_tar:close(Tar),
+
+    ok = file:make_dir("extracted"),
+    erl_tar:extract(TarFile, [{cwd, "extracted"}]),
+
+    {ok, #file_info{mtime=0}} =
+        file:read_file_info("extracted/empty_directory", [{time, posix}]),
+    {ok, #file_info{mtime=0}} =
+        file:read_file_info("extracted/file", [{time, posix}]),
+    {ok, #file_info{mtime=0}} =
+        file:read_file_info("extracted/memory_file", [{time, posix}]),
+
+    ok.
 
 %% Delete the given list of files.
 delete_files([]) -> ok;
diff --git a/lib/stdlib/test/unicode_util_SUITE.erl b/lib/stdlib/test/unicode_util_SUITE.erl
index 7dba0a2fd0..40b1c260a5 100644
--- a/lib/stdlib/test/unicode_util_SUITE.erl
+++ b/lib/stdlib/test/unicode_util_SUITE.erl
@@ -136,10 +136,10 @@ verify_gc(Line0, N, Acc) ->
             io:format("Expected: ~p~n", [Res]),
             io:format("Got: ~w~n", [Other]),
             Acc+1;
-          Cl:R ->
+          Cl:R:Stacktrace ->
             io:format("~p: ~ts => |~tp|~n",[N, Line, Str]),
             io:format("Expected: ~p~n", [Res]),
-            erlang:raise(Cl,R,erlang:get_stacktrace())
+            erlang:raise(Cl,R,Stacktrace)
     end.
 
 gc_test_data([[247]|Rest], Str, [First|GCs]) ->
@@ -175,29 +175,29 @@ verify_nfd(Data0, LineNo, _Acc) ->
         C3GC = fetch(C1, fun unicode_util:nfd/1),
         C3GC = fetch(C2, fun unicode_util:nfd/1),
         C3GC = fetch(C3, fun unicode_util:nfd/1)
-    catch  _Cl:{badmatch, Other} = _R->
+    catch  _Cl:{badmatch, Other} = _R: Stacktrace ->
             io:format("Failed: ~p~nInput: ~ts~n\t=> ~w |~ts|~n",[LineNo, Data1, C1, C1]),
             io:format("Expected: ~ts ~w~n", [C3GC, C3GC]),
             io:format("Got: ~ts ~w~n", [Other, Other]),
-            erlang:raise(_Cl,_R,erlang:get_stacktrace());
-           Cl:R ->
+            erlang:raise(_Cl,_R,Stacktrace);
+           Cl:R:Stacktrace ->
             io:format("~p: ~ts => |~tp|~n",[LineNo, Data1, C1]),
             io:format("Expected: ~p~n", [C3]),
-            erlang:raise(Cl,R,erlang:get_stacktrace())
+            erlang:raise(Cl,R,Stacktrace)
     end,
     C5GC = fetch(C5, fun unicode_util:gc/1),
     try
         C5GC = fetch(C4, fun unicode_util:nfd/1),
         C5GC = fetch(C5, fun unicode_util:nfd/1)
-    catch  _Cl2:{badmatch, Other2} = _R2->
+    catch  _Cl2:{badmatch, Other2} = _R2:Stacktrace2 ->
             io:format("Failed: ~p~nInput: ~ts~n\t=> ~w |~ts|~n",[LineNo, Data1, C1, C1]),
             io:format("Expected: ~ts ~w~n", [C5GC, C5GC]),
             io:format("Got:      ~ts ~w~n", [Other2, Other2]),
-            erlang:raise(_Cl2,_R2,erlang:get_stacktrace());
-           Cl2:R2 ->
+            erlang:raise(_Cl2,_R2,Stacktrace2);
+           Cl2:R2:Stacktrace2 ->
             io:format("~p: ~ts => |~tp|~n",[LineNo, Data1, C1]),
             io:format("Expected: ~p~n", [C5]),
-            erlang:raise(Cl2,R2,erlang:get_stacktrace())
+            erlang:raise(Cl2,R2,Stacktrace2)
     end,
     ok.
 
@@ -218,29 +218,29 @@ verify_nfc(Data0, LineNo, _Acc) ->
         C2GC = fetch(C1, fun unicode_util:nfc/1),
         C2GC = fetch(C2, fun unicode_util:nfc/1),
         C2GC = fetch(C3, fun unicode_util:nfc/1)
-    catch  _Cl:{badmatch, Other} = _R->
+    catch  _Cl:{badmatch, Other} = _R:Stacktrace ->
             io:format("Failed: ~p~nInput: ~ts~n\t=> ~w |~ts|~n",[LineNo, Data1, C1, C1]),
             io:format("Expected: ~ts ~w~n", [C2GC, C2GC]),
             io:format("Got:      ~ts ~w~n", [Other, Other]),
-            erlang:raise(_Cl,_R,erlang:get_stacktrace());
-           Cl:R ->
+            erlang:raise(_Cl,_R,Stacktrace);
+           Cl:R:Stacktrace ->
             io:format("~p: ~ts => |~tp|~n",[LineNo, Data1, C1]),
             io:format("Expected: ~p~n", [C3]),
-            erlang:raise(Cl,R,erlang:get_stacktrace())
+            erlang:raise(Cl,R,Stacktrace)
     end,
     C4GC = fetch(C4, fun unicode_util:gc/1),
     try
         C4GC = fetch(C4, fun unicode_util:nfc/1),
         C4GC = fetch(C5, fun unicode_util:nfc/1)
-    catch  _Cl2:{badmatch, Other2} = _R2->
+    catch  _Cl2:{badmatch, Other2} = _R2:Stacktrace2 ->
             io:format("Failed: ~p~nInput: ~ts~n\t=> ~w |~ts|~n",[LineNo, Data1, C1, C1]),
             io:format("Expected: ~ts ~w~n", [C4GC, C4GC]),
             io:format("Got: ~ts ~w~n", [Other2, Other2]),
-            erlang:raise(_Cl2,_R2,erlang:get_stacktrace());
-           Cl2:R2 ->
+            erlang:raise(_Cl2,_R2,Stacktrace2);
+           Cl2:R2:Stacktrace2 ->
             io:format("~p: ~ts => |~tp|~n",[LineNo, Data1, C1]),
             io:format("Expected: ~p~n", [C5]),
-            erlang:raise(Cl2,R2,erlang:get_stacktrace())
+            erlang:raise(Cl2,R2,Stacktrace2)
     end,
     ok.
 
@@ -263,15 +263,15 @@ verify_nfkd(Data0, LineNo, _Acc) ->
         C5GC = lists:flatten(fetch(C3, fun unicode_util:nfkd/1)),
         C5GC = lists:flatten(fetch(C4, fun unicode_util:nfkd/1)),
         C5GC = lists:flatten(fetch(C5, fun unicode_util:nfkd/1))
-    catch  _Cl:{badmatch, Other} = _R->
+    catch  _Cl:{badmatch, Other} = _R:Stacktrace ->
             io:format("Failed: ~p~nInput: ~ts~n\t=> ~w |~ts|~n",[LineNo, Data1, C5, C5]),
             io:format("Expected: ~ts ~w~n", [C5GC, C5GC]),
             io:format("Got: ~ts ~w~n", [Other, Other]),
-            erlang:raise(_Cl,_R,erlang:get_stacktrace());
-           Cl:R ->
+            erlang:raise(_Cl,_R,Stacktrace);
+           Cl:R:Stacktrace ->
             io:format("~p: ~ts => |~tp|~n",[LineNo, Data1, C1]),
             io:format("Expected: ~p~n", [C3]),
-            erlang:raise(Cl,R,erlang:get_stacktrace())
+            erlang:raise(Cl,R,Stacktrace)
     end,
     ok.
 
@@ -296,15 +296,15 @@ verify_nfkc(Data0, LineNo, _Acc) ->
         C4GC = lists:flatten(fetch(C4, fun unicode_util:nfkc/1)),
         C4GC = lists:flatten(fetch(C5, fun unicode_util:nfkc/1))
 
-    catch  _Cl:{badmatch, Other} = _R->
+    catch  _Cl:{badmatch, Other} = _R:Stacktrace ->
             io:format("Failed: ~p~nInput: ~ts~n\t=> ~w |~ts|~n",[LineNo, Data1, C4, C4]),
             io:format("Expected: ~ts ~w~n", [C4GC, C4GC]),
             io:format("Got:      ~ts ~w~n", [Other, Other]),
-            erlang:raise(_Cl,_R,erlang:get_stacktrace());
-           Cl:R ->
+            erlang:raise(_Cl,_R,Stacktrace);
+           Cl:R:Stacktrace ->
             io:format("~p: ~ts => |~tp|~n",[LineNo, Data1, C1]),
             io:format("Expected: ~p~n", [C3]),
-            erlang:raise(Cl,R,erlang:get_stacktrace())
+            erlang:raise(Cl,R,Stacktrace)
     end,
     ok.
 
@@ -312,12 +312,23 @@ get(_) ->
     add_get_tests.
 
 count(Config) ->
+    Parent = self(),
+    Exec = fun() ->
+                   do_measure(Config),
+                   Parent ! {test_done, self()}
+           end,
     ct:timetrap({minutes,5}),
     case ct:get_timetrap_info() of
-        {_,{_,Scale}} ->
+        {_,{_,Scale}} when Scale > 1 ->
             {skip,{measurments_skipped_debug,Scale}};
-        _ -> % No scaling
-            do_measure(Config)
+        _ -> % No scaling, run at most 2 min
+            Tester = spawn(Exec),
+            receive {test_done, Tester} -> ok
+            after 120000 ->
+                    io:format("Timelimit reached stopping~n",[]),
+                    exit(Tester, die)
+            end,
+            ok
     end.
 
 do_measure(Config) ->
diff --git a/lib/stdlib/test/uri_string_SUITE.erl b/lib/stdlib/test/uri_string_SUITE.erl
new file mode 100644
index 0000000000..92f8bb3292
--- /dev/null
+++ b/lib/stdlib/test/uri_string_SUITE.erl
@@ -0,0 +1,979 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(uri_string_SUITE).
+
+-include_lib("common_test/include/ct.hrl").
+
+-export([all/0, suite/0,groups/0,
+         normalize/1, normalize_map/1, normalize_return_map/1, normalize_negative/1,
+         parse_binary_fragment/1, parse_binary_host/1, parse_binary_host_ipv4/1,
+         parse_binary_host_ipv6/1,
+         parse_binary_path/1, parse_binary_pct_encoded_fragment/1, parse_binary_pct_encoded_query/1,
+         parse_binary_pct_encoded_userinfo/1, parse_binary_port/1,
+         parse_binary_query/1, parse_binary_scheme/1, parse_binary_userinfo/1,
+         parse_fragment/1, parse_host/1, parse_host_ipv4/1, parse_host_ipv6/1,
+         parse_path/1, parse_pct_encoded_fragment/1, parse_pct_encoded_query/1,
+         parse_pct_encoded_userinfo/1, parse_port/1,
+         parse_query/1, parse_scheme/1, parse_userinfo/1,
+	 parse_list/1, parse_binary/1, parse_mixed/1, parse_relative/1,
+         parse_special/1, parse_special2/1, parse_negative/1,
+         recompose_fragment/1, recompose_parse_fragment/1,
+         recompose_query/1, recompose_parse_query/1,
+         recompose_path/1, recompose_parse_path/1,
+         recompose_autogen/1, parse_recompose_autogen/1,
+         transcode_basic/1, transcode_options/1, transcode_mixed/1, transcode_negative/1,
+         compose_query/1, compose_query_latin1/1, compose_query_negative/1,
+         dissect_query/1, dissect_query_negative/1,
+         interop_query_latin1/1, interop_query_utf8/1
+        ]).
+
+
+-define(SCHEME, "foo").
+-define(USERINFO, "åsa").
+-define(USERINFO_ENC, "%C3%A5sa").
+-define(HOST, "älvsjö").
+-define(HOST_ENC, "%C3%A4lvsj%C3%B6").
+-define(IPV6, "::127.0.0.1").
+-define(IPV6_ENC, "[::127.0.0.1]").
+-define(PORT, 8042).
+-define(PORT_ENC, ":8042").
+-define(PATH, "/där").
+-define(PATH_ENC, "/d%C3%A4r").
+-define(QUERY, "name=örn").
+-define(QUERY_ENC, "?name=%C3%B6rn").
+-define(FRAGMENT, "näsa").
+-define(FRAGMENT_ENC, "#n%C3%A4sa").
+
+
+suite() ->
+    [{timetrap,{minutes,1}}].
+
+all() ->
+    [
+     normalize,
+     normalize_map,
+     normalize_return_map,
+     normalize_negative,
+     parse_binary_scheme,
+     parse_binary_userinfo,
+     parse_binary_pct_encoded_userinfo,
+     parse_binary_host,
+     parse_binary_host_ipv4,
+     parse_binary_host_ipv6,
+     parse_binary_port,
+     parse_binary_path,
+     parse_binary_query,
+     parse_binary_pct_encoded_query,
+     parse_binary_fragment,
+     parse_binary_pct_encoded_fragment,
+     parse_scheme,
+     parse_userinfo,
+     parse_pct_encoded_userinfo,
+     parse_host,
+     parse_host_ipv4,
+     parse_host_ipv6,
+     parse_port,
+     parse_path,
+     parse_query,
+     parse_pct_encoded_query,
+     parse_fragment,
+     parse_pct_encoded_fragment,
+     parse_list,
+     parse_binary,
+     parse_mixed,
+     parse_relative,
+     parse_special,
+     parse_special2,
+     parse_negative,
+     recompose_fragment,
+     recompose_parse_fragment,
+     recompose_query,
+     recompose_parse_query,
+     recompose_path,
+     recompose_parse_path,
+     recompose_autogen,
+     parse_recompose_autogen,
+     transcode_basic,
+     transcode_options,
+     transcode_mixed,
+     transcode_negative,
+     compose_query,
+     compose_query_latin1,
+     compose_query_negative,
+     dissect_query,
+     dissect_query_negative,
+     interop_query_latin1,
+     interop_query_utf8
+    ].
+
+groups() ->
+    [].
+
+
+%%-------------------------------------------------------------------------
+%% Helper functions
+%%-------------------------------------------------------------------------
+uri_combinations() ->
+    [[Sch,Usr,Hst,Prt,Pat,Qry,Frg] ||
+        Sch <- [fun update_scheme/1, fun update_scheme_binary/1, none],
+        Usr <- [fun update_userinfo/1, fun update_userinfo_binary/1, none],
+        Hst <- [fun update_host/1, fun update_host_binary/1,
+                fun update_ipv6/1, fun update_ipv6_binary/1, none],
+        Prt <- [fun update_port/1, none],
+        Pat <- [fun update_path/1, fun update_path_binary/1],
+        Qry <- [fun update_query/1,fun update_query_binary/1, none],
+        Frg <- [fun update_fragment/1, fun update_fragment_binary/1, none],
+        not (Usr =:= none andalso Hst =:= none andalso Prt =/= none),
+        not (Usr =/= none andalso Hst =:= none andalso Prt =:= none),
+        not (Usr =/= none andalso Hst =:= none andalso Prt =/= none)].
+
+
+generate_test_vector(Comb) ->
+    Fun = fun (F, {Map, URI}) when is_function(F) -> F({Map, URI});
+              (_, Map) -> Map
+          end,
+    lists:foldl(Fun, {#{}, empty}, Comb).
+
+generate_test_vectors(L) ->
+    lists:map(fun generate_test_vector/1, L).
+
+update_fragment({In, empty}) ->
+    {In#{fragment => ?FRAGMENT}, ?FRAGMENT_ENC};
+update_fragment({In, Out}) when is_list(Out) ->
+    {In#{fragment => ?FRAGMENT}, Out ++ ?FRAGMENT_ENC};
+update_fragment({In, Out}) when is_binary(Out) ->
+    {In#{fragment => ?FRAGMENT}, binary_to_list(Out) ++ ?FRAGMENT_ENC}.
+
+update_fragment_binary({In, empty}) ->
+    {In#{fragment => <<?FRAGMENT/utf8>>}, <<?FRAGMENT_ENC>>};
+update_fragment_binary({In, Out}) when is_list(Out) ->
+    {In#{fragment => <<?FRAGMENT/utf8>>}, Out ++ ?FRAGMENT_ENC};
+update_fragment_binary({In, Out}) when is_binary(Out) ->
+    {In#{fragment => <<?FRAGMENT/utf8>>}, <<Out/binary,?FRAGMENT_ENC>>}.
+
+
+update_query({In, empty}) ->
+    {In#{query => ?QUERY}, ?QUERY_ENC};
+update_query({In, Out}) when is_list(Out) ->
+    {In#{query => ?QUERY}, Out ++ ?QUERY_ENC};
+update_query({In, Out}) when is_binary(Out) ->
+    {In#{query => ?QUERY}, binary_to_list(Out) ++ ?QUERY_ENC}.
+
+update_query_binary({In, empty}) ->
+    {In#{query => <<?QUERY/utf8>>}, <<?QUERY_ENC>>};
+update_query_binary({In, Out}) when is_list(Out) ->
+    {In#{query => <<?QUERY/utf8>>}, Out ++ ?QUERY_ENC};
+update_query_binary({In, Out}) when is_binary(Out) ->
+    {In#{query => <<?QUERY/utf8>>}, <<Out/binary,?QUERY_ENC>>}.
+
+update_path({In, empty}) ->
+    {In#{path => ?PATH}, ?PATH_ENC};
+update_path({In, Out}) when is_list(Out) ->
+    {In#{path => ?PATH}, Out ++ ?PATH_ENC};
+update_path({In, Out}) when is_binary(Out) ->
+    {In#{path => ?PATH}, binary_to_list(Out) ++ ?PATH_ENC}.
+
+update_path_binary({In, empty}) ->
+    {In#{path => <<?PATH/utf8>>}, <<?PATH_ENC>>};
+update_path_binary({In, Out}) when is_list(Out) ->
+    {In#{path => <<?PATH/utf8>>}, Out ++ ?PATH_ENC};
+update_path_binary({In, Out}) when is_binary(Out) ->
+    {In#{path => <<?PATH/utf8>>}, <<Out/binary,?PATH_ENC>>}.
+
+update_port({In, Out}) when is_list(Out) ->
+    {In#{port => ?PORT}, Out ++ ?PORT_ENC};
+update_port({In, Out}) when is_binary(Out) ->
+    {In#{port => ?PORT}, <<Out/binary,?PORT_ENC>>}.
+
+update_host({In, empty}) ->
+    {In#{host => ?HOST}, "//" ++ ?HOST_ENC};
+update_host({In, Out}) when is_list(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => ?HOST}, Out ++ [$@|?HOST_ENC]};
+        false -> {In#{host => ?HOST}, Out ++ [$/,$/|?HOST_ENC]}
+    end;
+update_host({In, Out}) when is_binary(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => ?HOST}, binary_to_list(Out) ++ [$@|?HOST_ENC]};
+        false -> {In#{host => ?HOST}, binary_to_list(Out) ++ [$/,$/|?HOST_ENC]}
+    end.
+
+update_host_binary({In, empty}) ->
+    {In#{host => <<?HOST/utf8>>}, <<"//",?HOST_ENC>>};
+update_host_binary({In, Out}) when is_list(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => <<?HOST/utf8>>}, Out ++ [$@|?HOST_ENC]};
+        false -> {In#{host => <<?HOST/utf8>>}, Out ++ [$/,$/|?HOST_ENC]}
+    end;
+update_host_binary({In, Out}) when is_binary(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => <<?HOST/utf8>>}, <<Out/binary,$@,?HOST_ENC>>};
+        false-> {In#{host => <<?HOST/utf8>>}, <<Out/binary,"//",?HOST_ENC>>}
+    end.
+
+update_ipv6({In, empty}) ->
+    {In#{host => ?IPV6}, "//" ++ ?IPV6_ENC};
+update_ipv6({In, Out}) when is_list(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => ?IPV6}, Out ++ [$@|?IPV6_ENC]};
+        false -> {In#{host => ?IPV6}, Out ++ [$/,$/|?IPV6_ENC]}
+    end;
+update_ipv6({In, Out}) when is_binary(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => ?IPV6}, binary_to_list(Out) ++ [$@|?IPV6_ENC]};
+        false -> {In#{host => ?IPV6}, binary_to_list(Out) ++ [$/,$/|?IPV6_ENC]}
+    end.
+
+update_ipv6_binary({In, empty}) ->
+    {In#{host => <<?IPV6/utf8>>}, <<"//",?IPV6_ENC>>};
+update_ipv6_binary({In, Out}) when is_list(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => <<?IPV6/utf8>>}, Out ++ [$@|?IPV6_ENC]};
+        false -> {In#{host => <<?IPV6/utf8>>}, Out ++ [$/,$/|?IPV6_ENC]}
+    end;
+update_ipv6_binary({In, Out}) when is_binary(Out) ->
+    case maps:is_key(userinfo, In) of
+        true -> {In#{host => <<?IPV6/utf8>>}, <<Out/binary,$@,?IPV6_ENC>>};
+        false-> {In#{host => <<?IPV6/utf8>>}, <<Out/binary,"//",?IPV6_ENC>>}
+    end.
+
+update_userinfo({In, empty}) ->
+    {In#{userinfo => ?USERINFO}, "//" ++ ?USERINFO_ENC};
+update_userinfo({In, Out}) when is_list(Out) ->
+    {In#{userinfo => ?USERINFO}, Out ++ "//" ++ ?USERINFO_ENC};
+update_userinfo({In, Out}) when is_binary(Out) ->
+    {In#{userinfo => ?USERINFO}, binary_to_list(Out) ++ "//" ++ ?USERINFO_ENC}.
+
+update_userinfo_binary({In, empty}) ->
+    {In#{userinfo => <<?USERINFO/utf8>>}, <<"//",?USERINFO_ENC>>};
+update_userinfo_binary({In, Out}) when is_list(Out) ->
+    {In#{userinfo => <<?USERINFO/utf8>>}, Out ++ "//" ++ ?USERINFO_ENC};
+update_userinfo_binary({In, Out}) when is_binary(Out) ->
+    {In#{userinfo => <<?USERINFO/utf8>>}, <<Out/binary,"//",?USERINFO_ENC>>}.
+
+update_scheme({In, empty}) ->
+    {In#{scheme => ?SCHEME}, ?SCHEME ++ ":"}.
+
+update_scheme_binary({In, empty}) ->
+    {In#{scheme => <<?SCHEME/utf8>>}, <<?SCHEME,$:>>}.
+
+
+%% Test recompose on a generated test vector
+run_test_recompose({#{}, empty}) ->
+    try "" = uri_string:recompose(#{}) of
+        _ -> ok
+    catch
+        _:_ -> error({test_failed, #{}, ""})
+    end;
+run_test_recompose({Map, URI}) ->
+    try URI = uri_string:recompose(Map) of
+        URI -> ok
+    catch
+        _:_ -> error({test_failed, Map, URI})
+    end.
+
+%% Test parse - recompose on a generated test vector
+run_test_parse_recompose({#{}, empty}) ->
+    try "" = uri_string:recompose(uri_string:parse("")) of
+        _ -> ok
+    catch
+        _:_ -> error({test_failed, #{}, ""})
+    end;
+run_test_parse_recompose({Map, URI}) ->
+    try URI = uri_string:recompose(uri_string:parse(URI)) of
+        URI -> ok
+    catch
+        _:_ -> error({test_failed, Map, URI})
+    end.
+
+
+%%-------------------------------------------------------------------------
+%% Parse tests
+%%-------------------------------------------------------------------------
+
+parse_binary_scheme(_Config) ->
+    #{} = uri_string:parse(<<>>),
+    #{path := <<"foo">>} = uri_string:parse(<<"foo">>),
+    #{scheme := <<"foo">>} = uri_string:parse(<<"foo:">>),
+    #{scheme := <<"foo">>, path := <<"bar:nisse">>} = uri_string:parse(<<"foo:bar:nisse">>),
+    #{scheme := <<"foo">>, host := <<"">>} = uri_string:parse(<<"foo://">>),
+    #{scheme := <<"foo">>, host := <<"">>, path := <<"/">>} = uri_string:parse(<<"foo:///">>),
+    #{scheme := <<"foo">>, host := <<"">>, path := <<"//">>} = uri_string:parse(<<"foo:////">>),
+
+    #{path := <<"/">>} = uri_string:parse(<<"/">>),
+    #{host := <<>>} = uri_string:parse(<<"//">>),
+    #{host := <<>>, path := <<"/">>} = uri_string:parse(<<"///">>).
+
+parse_binary_userinfo(_Config) ->
+    #{scheme := <<"user">>, path := <<"password@localhost">>} =
+        uri_string:parse(<<"user:password@localhost">>),
+    #{path := <<"user@">>} = uri_string:parse(<<"user@">>),
+    #{path := <<"/user@">>} = uri_string:parse(<<"/user@">>),
+    #{path := <<"user@localhost">>} = uri_string:parse(<<"user@localhost">>),
+    #{userinfo := <<"user">>, host := <<"localhost">>} = uri_string:parse(<<"//user@localhost">>),
+    #{userinfo := <<"user:password">>, host := <<"localhost">>} =
+        uri_string:parse(<<"//user:password@localhost">>),
+    #{scheme := <<"foo">>, path := <<"/user@">>} =
+        uri_string:parse(<<"foo:/user@">>),
+    #{scheme := <<"foo">>, userinfo := <<"user">>, host := <<"localhost">>} =
+        uri_string:parse(<<"foo://user@localhost">>),
+    #{scheme := <<"foo">>, userinfo := <<"user:password">>, host := <<"localhost">>} =
+        uri_string:parse(<<"foo://user:password@localhost">>).
+
+parse_binary_pct_encoded_userinfo(_Config) ->
+    #{scheme := <<"user">>, path := <<"合@気道"/utf8>>} =
+        uri_string:parse(<<"user:%E5%90%88@%E6%B0%97%E9%81%93">>),
+    #{path := <<"合気道@"/utf8>>} = uri_string:parse(<<"%E5%90%88%E6%B0%97%E9%81%93@">>),
+    #{path := <<"/合気道@"/utf8>>} = uri_string:parse(<<"/%E5%90%88%E6%B0%97%E9%81%93@">>),
+    #{path := <<"合@気道"/utf8>>} = uri_string:parse(<<"%E5%90%88@%E6%B0%97%E9%81%93">>),
+    #{userinfo := <<"合"/utf8>>, host := <<"気道"/utf8>>} =
+        uri_string:parse(<<"//%E5%90%88@%E6%B0%97%E9%81%93">>),
+    #{userinfo := <<"合:気"/utf8>>, host := <<"道"/utf8>>} =
+        uri_string:parse(<<"//%E5%90%88:%E6%B0%97@%E9%81%93">>),
+    #{scheme := <<"foo">>, path := <<"/合気道@"/utf8>>} =
+        uri_string:parse(<<"foo:/%E5%90%88%E6%B0%97%E9%81%93@">>),
+    #{scheme := <<"foo">>, userinfo := <<"合"/utf8>>, host := <<"気道"/utf8>>} =
+        uri_string:parse(<<"foo://%E5%90%88@%E6%B0%97%E9%81%93">>),
+    #{scheme := <<"foo">>, userinfo := <<"合:気"/utf8>>, host := <<"道"/utf8>>} =
+        uri_string:parse(<<"foo://%E5%90%88:%E6%B0%97@%E9%81%93">>),
+    {error,invalid_uri,"@"} = uri_string:parse(<<"//%E5%90%88@%E6%B0%97%E9%81%93@">>),
+    {error,invalid_uri,":"} = uri_string:parse(<<"foo://%E5%90%88@%E6%B0%97%E9%81%93@">>).
+
+parse_binary_host(_Config) ->
+    #{host := <<"hostname">>} = uri_string:parse(<<"//hostname">>),
+    #{host := <<"hostname">>,scheme := <<"foo">>} = uri_string:parse(<<"foo://hostname">>),
+    #{host := <<"hostname">>,scheme := <<"foo">>, userinfo := <<"user">>} =
+        uri_string:parse(<<"foo://user@hostname">>).
+
+parse_binary_host_ipv4(_Config) ->
+    #{host := <<"127.0.0.1">>} = uri_string:parse(<<"//127.0.0.1">>),
+    #{host := <<"127.0.0.1">>, path := <<"/over/there">>} =
+        uri_string:parse(<<"//127.0.0.1/over/there">>),
+    #{host := <<"127.0.0.1">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"//127.0.0.1?name=ferret">>),
+    #{host := <<"127.0.0.1">>, fragment := <<"nose">>} = uri_string:parse(<<"//127.0.0.1#nose">>),
+    {error,invalid_uri,"x"} = uri_string:parse(<<"//127.0.0.x">>),
+    {error,invalid_uri,"1227.0.0.1"} = uri_string:parse(<<"//1227.0.0.1">>).
+
+parse_binary_host_ipv6(_Config) ->
+    #{host := <<"::127.0.0.1">>} = uri_string:parse(<<"//[::127.0.0.1]">>),
+    #{host := <<"2001:0db8:0000:0000:0000:0000:1428:07ab">>} =
+        uri_string:parse(<<"//[2001:0db8:0000:0000:0000:0000:1428:07ab]">>),
+    #{host := <<"::127.0.0.1">>, path := <<"/over/there">>} =
+        uri_string:parse(<<"//[::127.0.0.1]/over/there">>),
+    #{host := <<"::127.0.0.1">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"//[::127.0.0.1]?name=ferret">>),
+    #{host := <<"::127.0.0.1">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"//[::127.0.0.1]#nose">>),
+    {error,invalid_uri,"x"} = uri_string:parse(<<"//[::127.0.0.x]">>),
+    {error,invalid_uri,"::1227.0.0.1"} = uri_string:parse(<<"//[::1227.0.0.1]">>),
+    {error,invalid_uri,"G"} = uri_string:parse(<<"//[2001:0db8:0000:0000:0000:0000:1428:G7ab]">>).
+
+parse_binary_port(_Config) ->
+    #{path:= <<"/:8042">>} =
+        uri_string:parse(<<"/:8042">>),
+    #{host:= <<>>, port := 8042} =
+        uri_string:parse(<<"//:8042">>),
+    #{host := <<"example.com">>, port:= 8042} =
+        uri_string:parse(<<"//example.com:8042">>),
+    #{scheme := <<"foo">>, path := <<"/:8042">>} =
+        uri_string:parse(<<"foo:/:8042">>),
+    #{scheme := <<"foo">>, host := <<>>, port := 8042} =
+        uri_string:parse(<<"foo://:8042">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, port := 8042} =
+        uri_string:parse(<<"foo://example.com:8042">>),
+    {error,invalid_uri,":"} = uri_string:parse(":600"),
+    {error,invalid_uri,"x"} = uri_string:parse("//:8042x").
+
+parse_binary_path(_Config) ->
+    #{path := <<"over/there">>} = uri_string:parse(<<"over/there">>),
+    #{path := <<"/over/there">>} = uri_string:parse(<<"/over/there">>),
+    #{scheme := <<"foo">>, path := <<"/over/there">>} =
+        uri_string:parse(<<"foo:/over/there">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, path := <<"/over/there">>} =
+        uri_string:parse(<<"foo://example.com/over/there">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, path := <<"/over/there">>, port := 8042} =
+        uri_string:parse(<<"foo://example.com:8042/over/there">>).
+
+parse_binary_query(_Config) ->
+    #{scheme := <<"foo">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"foo:?name=ferret">>),
+    #{scheme := <<"foo">>, path:= <<"over/there">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"foo:over/there?name=ferret">>),
+    #{scheme := <<"foo">>, path:= <<"/over/there">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"foo:/over/there?name=ferret">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"foo://example.com?name=ferret">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, path := <<"/">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"foo://example.com/?name=ferret">>),
+
+    #{path := <<>>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"?name=ferret">>),
+    #{path := <<"over/there">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"over/there?name=ferret">>),
+    #{path := <<"/">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"/?name=ferret">>),
+    #{path := <<"/over/there">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"/over/there?name=ferret">>),
+    #{host := <<"example.com">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"//example.com?name=ferret">>),
+    #{host := <<"example.com">>, path := <<"/">>, query := <<"name=ferret">>} =
+        uri_string:parse(<<"//example.com/?name=ferret">>).
+
+parse_binary_pct_encoded_query(_Config) ->
+    #{scheme := <<"foo">>, host := <<"example.com">>, path := <<"/">>,
+      query := <<"name=合気道"/utf8>>} =
+        uri_string:parse(<<"foo://example.com/?name=%E5%90%88%E6%B0%97%E9%81%93">>),
+    #{host := <<"example.com">>, path := <<"/">>, query := <<"name=合気道"/utf8>>} =
+        uri_string:parse(<<"//example.com/?name=%E5%90%88%E6%B0%97%E9%81%93">>).
+
+parse_binary_fragment(_Config) ->
+    #{scheme := <<"foo">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo:#nose">>),
+    #{scheme := <<"foo">>, path:= <<"over/there">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo:over/there#nose">>),
+    #{scheme := <<"foo">>, path:= <<"/over/there">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo:/over/there#nose">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo://example.com#nose">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, path := <<"/">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo://example.com/#nose">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo://example.com#nose">>),
+
+    #{fragment := <<"nose">>} =
+        uri_string:parse(<<"#nose">>),
+    #{path := <<"over/there">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"over/there#nose">>),
+    #{path := <<"/">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"/#nose">>),
+    #{path := <<"/over/there">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"/over/there#nose">>),
+    #{host := <<"example.com">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"//example.com#nose">>),
+    #{host := <<"example.com">>, path := <<"/">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"//example.com/#nose">>).
+
+parse_binary_pct_encoded_fragment(_Config) ->
+    #{scheme := <<"foo">>, host := <<"example.com">>, fragment := <<"合気道"/utf8>>} =
+        uri_string:parse(<<"foo://example.com#%E5%90%88%E6%B0%97%E9%81%93">>),
+    #{host := <<"example.com">>, path := <<"/">>, fragment := <<"合気道"/utf8>>} =
+        uri_string:parse(<<"//example.com/#%E5%90%88%E6%B0%97%E9%81%93">>).
+
+parse_scheme(_Config) ->
+    #{} = uri_string:parse(""),
+    #{path := "foo"} = uri_string:parse("foo"),
+    #{scheme := "foo"} = uri_string:parse("foo:"),
+    #{scheme := "foo", path := "bar:nisse"} = uri_string:parse("foo:bar:nisse"),
+    #{scheme := "foo", host := ""} = uri_string:parse("foo://"),
+    #{scheme := "foo", host := "", path := "/"} = uri_string:parse("foo:///"),
+    #{scheme := "foo", host := "", path := "//"} = uri_string:parse("foo:////"),
+
+    #{path := "/"} = uri_string:parse("/"),
+    #{host := ""} = uri_string:parse("//"),
+    #{host := "", path := "/"} = uri_string:parse("///").
+
+parse_userinfo(_Config) ->
+    #{scheme := "user", path := "password@localhost"} = uri_string:parse("user:password@localhost"),
+    #{path := "user@"} = uri_string:parse("user@"),
+    #{path := "/user@"} = uri_string:parse("/user@"),
+    #{path := "user@localhost"} = uri_string:parse("user@localhost"),
+    #{userinfo := "user", host := "localhost"} = uri_string:parse("//user@localhost"),
+    #{userinfo := "user:password", host := "localhost"} =
+        uri_string:parse("//user:password@localhost"),
+    #{scheme := "foo", path := "/user@"} =
+        uri_string:parse("foo:/user@"),
+    #{scheme := "foo", userinfo := "user", host := "localhost"} =
+        uri_string:parse("foo://user@localhost"),
+    #{scheme := "foo", userinfo := "user:password", host := "localhost"} =
+        uri_string:parse("foo://user:password@localhost").
+
+parse_pct_encoded_userinfo(_Config) ->
+    #{scheme := "user", path := "合@気道"} =
+        uri_string:parse("user:%E5%90%88@%E6%B0%97%E9%81%93"),
+    #{path := "合気道@"} = uri_string:parse("%E5%90%88%E6%B0%97%E9%81%93@"),
+    #{path := "/合気道@"} = uri_string:parse("/%E5%90%88%E6%B0%97%E9%81%93@"),
+    #{path := "合@気道"} = uri_string:parse("%E5%90%88@%E6%B0%97%E9%81%93"),
+    #{userinfo := "合", host := "気道"} =
+        uri_string:parse("//%E5%90%88@%E6%B0%97%E9%81%93"),
+    #{userinfo := "合:気", host := "道"} =
+        uri_string:parse("//%E5%90%88:%E6%B0%97@%E9%81%93"),
+    #{scheme := "foo", path := "/合気道@"} =
+        uri_string:parse("foo:/%E5%90%88%E6%B0%97%E9%81%93@"),
+    #{scheme := "foo", userinfo := "合", host := "気道"} =
+        uri_string:parse("foo://%E5%90%88@%E6%B0%97%E9%81%93"),
+    #{scheme := "foo", userinfo := "合:気", host := "道"} =
+        uri_string:parse("foo://%E5%90%88:%E6%B0%97@%E9%81%93"),
+    {error,invalid_uri,"@"} = uri_string:parse("//%E5%90%88@%E6%B0%97%E9%81%93@"),
+    {error,invalid_uri,":"} = uri_string:parse("foo://%E5%90%88@%E6%B0%97%E9%81%93@").
+
+
+parse_host(_Config) ->
+    #{host := "hostname"} = uri_string:parse("//hostname"),
+    #{host := "hostname",scheme := "foo"} = uri_string:parse("foo://hostname"),
+    #{host := "hostname",scheme := "foo", userinfo := "user"} =
+        uri_string:parse("foo://user@hostname").
+
+parse_host_ipv4(_Config) ->
+    #{host := "127.0.0.1"} = uri_string:parse("//127.0.0.1"),
+    #{host := "2001:0db8:0000:0000:0000:0000:1428:07ab"} =
+        uri_string:parse("//[2001:0db8:0000:0000:0000:0000:1428:07ab]"),
+    #{host := "127.0.0.1", path := "/over/there"} = uri_string:parse("//127.0.0.1/over/there"),
+    #{host := "127.0.0.1", query := "name=ferret"} = uri_string:parse("//127.0.0.1?name=ferret"),
+    #{host := "127.0.0.1", fragment := "nose"} = uri_string:parse("//127.0.0.1#nose"),
+    {error,invalid_uri,"x"} = uri_string:parse("//127.0.0.x"),
+    {error,invalid_uri,"1227.0.0.1"} = uri_string:parse("//1227.0.0.1").
+
+parse_host_ipv6(_Config) ->
+    #{host := "::127.0.0.1"} = uri_string:parse("//[::127.0.0.1]"),
+    #{host := "::127.0.0.1", path := "/over/there"} = uri_string:parse("//[::127.0.0.1]/over/there"),
+    #{host := "::127.0.0.1", query := "name=ferret"} =
+        uri_string:parse("//[::127.0.0.1]?name=ferret"),
+    #{host := "::127.0.0.1", fragment := "nose"} = uri_string:parse("//[::127.0.0.1]#nose"),
+    {error,invalid_uri,"x"} = uri_string:parse("//[::127.0.0.x]"),
+    {error,invalid_uri,"::1227.0.0.1"} = uri_string:parse("//[::1227.0.0.1]"),
+    {error,invalid_uri,"G"} = uri_string:parse("//[2001:0db8:0000:0000:0000:0000:1428:G7ab]").
+
+parse_port(_Config) ->
+    #{path:= "/:8042"} =
+        uri_string:parse("/:8042"),
+    #{host:= "", port := 8042} =
+        uri_string:parse("//:8042"),
+    #{host := "example.com", port:= 8042} =
+        uri_string:parse("//example.com:8042"),
+    #{scheme := "foo", path := "/:8042"} =
+        uri_string:parse("foo:/:8042"),
+    #{scheme := "foo", host := "", port := 8042} =
+        uri_string:parse("foo://:8042"),
+    #{scheme := "foo", host := "example.com", port := 8042} =
+        uri_string:parse("foo://example.com:8042").
+
+parse_path(_Config) ->
+    #{path := "over/there"} = uri_string:parse("over/there"),
+    #{path := "/over/there"} = uri_string:parse("/over/there"),
+    #{scheme := "foo", path := "/over/there"} =
+        uri_string:parse("foo:/over/there"),
+    #{scheme := "foo", host := "example.com", path := "/over/there"} =
+        uri_string:parse("foo://example.com/over/there"),
+    #{scheme := "foo", host := "example.com", path := "/over/there", port := 8042} =
+        uri_string:parse("foo://example.com:8042/over/there").
+
+parse_query(_Config) ->
+    #{scheme := "foo", query := "name=ferret"} =
+        uri_string:parse("foo:?name=ferret"),
+    #{scheme := "foo", path:= "over/there", query := "name=ferret"} =
+        uri_string:parse("foo:over/there?name=ferret"),
+    #{scheme := "foo", path:= "/over/there", query := "name=ferret"} =
+        uri_string:parse("foo:/over/there?name=ferret"),
+    #{scheme := "foo", host := "example.com", query := "name=ferret"} =
+        uri_string:parse("foo://example.com?name=ferret"),
+    #{scheme := "foo", host := "example.com", path := "/", query := "name=ferret"} =
+        uri_string:parse("foo://example.com/?name=ferret"),
+
+    #{path := "", query := "name=ferret"} =
+        uri_string:parse("?name=ferret"),
+    #{path := "over/there", query := "name=ferret"} =
+        uri_string:parse("over/there?name=ferret"),
+    #{path := "/", query := "name=ferret"} =
+        uri_string:parse("/?name=ferret"),
+    #{path := "/over/there", query := "name=ferret"} =
+        uri_string:parse("/over/there?name=ferret"),
+    #{host := "example.com", query := "name=ferret"} =
+        uri_string:parse("//example.com?name=ferret"),
+    #{host := "example.com", path := "/", query := "name=ferret"} =
+        uri_string:parse("//example.com/?name=ferret").
+
+parse_pct_encoded_query(_Config) ->
+    #{scheme := "foo", host := "example.com", path := "/",
+      query := "name=合気道"} =
+        uri_string:parse("foo://example.com/?name=%E5%90%88%E6%B0%97%E9%81%93"),
+    #{host := "example.com", path := "/", query := "name=合気道"} =
+        uri_string:parse("//example.com/?name=%E5%90%88%E6%B0%97%E9%81%93").
+
+parse_fragment(_Config) ->
+    #{scheme := "foo", fragment := "nose"} =
+        uri_string:parse("foo:#nose"),
+    #{scheme := "foo", path:= "over/there", fragment := "nose"} =
+        uri_string:parse("foo:over/there#nose"),
+    #{scheme := "foo", path:= "/over/there", fragment := "nose"} =
+        uri_string:parse("foo:/over/there#nose"),
+    #{scheme := "foo", host := "example.com", fragment := "nose"} =
+        uri_string:parse("foo://example.com#nose"),
+    #{scheme := "foo", host := "example.com", path := "/", fragment := "nose"} =
+        uri_string:parse("foo://example.com/#nose"),
+    #{scheme := "foo", host := "example.com", fragment := "nose"} =
+        uri_string:parse("foo://example.com#nose"),
+
+    #{fragment := "nose"} =
+        uri_string:parse("#nose"),
+    #{path := "over/there", fragment := "nose"} =
+        uri_string:parse("over/there#nose"),
+    #{path := "/", fragment := "nose"} =
+        uri_string:parse("/#nose"),
+    #{path := "/over/there", fragment := "nose"} =
+        uri_string:parse("/over/there#nose"),
+    #{host := "example.com", fragment := "nose"} =
+        uri_string:parse("//example.com#nose"),
+    #{host := "example.com", path := "/", fragment := "nose"} =
+        uri_string:parse("//example.com/#nose").
+
+parse_pct_encoded_fragment(_Config) ->
+    #{scheme := "foo", host := "example.com", fragment := "合気道"} =
+        uri_string:parse("foo://example.com#%E5%90%88%E6%B0%97%E9%81%93"),
+    #{host := "example.com", path := "/", fragment := "合気道"} =
+        uri_string:parse("//example.com/#%E5%90%88%E6%B0%97%E9%81%93").
+
+parse_list(_Config) ->
+    #{scheme := "foo", path := "bar:nisse"} = uri_string:parse("foo:bar:nisse"),
+    #{scheme := "foo", host := "example.com", port := 8042,
+      path := "/over/there", query := "name=ferret", fragment := "nose"} =
+        uri_string:parse("foo://example.com:8042/over/there?name=ferret#nose"),
+    #{scheme := "foo", userinfo := "admin:admin", host := "example.com", port := 8042,
+      path := "/over/there", query := "name=ferret", fragment := "nose"} =
+        uri_string:parse("foo://admin:[email protected]:8042/over/there?name=ferret#nose").
+
+parse_binary(_Config) ->
+    #{scheme := <<"foo">>, path := <<"bar:nisse">>} = uri_string:parse(<<"foo:bar:nisse">>),
+    #{scheme := <<"foo">>, host := <<"example.com">>, port := 8042,
+      path := <<"/over/there">>, query := <<"name=ferret">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo://example.com:8042/over/there?name=ferret#nose">>),
+    #{scheme := <<"foo">>, userinfo := <<"admin:admin">>, host := <<"example.com">>, port := 8042,
+      path := <<"/over/there">>, query := <<"name=ferret">>, fragment := <<"nose">>} =
+        uri_string:parse(<<"foo://admin:[email protected]:8042/over/there?name=ferret#nose">>).
+
+
+parse_mixed(_Config) ->
+    #{scheme := "foo", path := "bar"} =
+        uri_string:parse(lists:append("fo",<<"o:bar">>)),
+    #{scheme := "foo", path := "bar"} =
+        uri_string:parse(lists:append("foo:b",<<"ar">>)),
+    #{scheme := "foo", path := "bar:bar"} =
+        uri_string:parse([[102],[111,111],<<":bar">>,58,98,97,114]).
+
+parse_relative(_Config) ->
+    #{path := "/path"} =
+        uri_string:parse(lists:append("/pa",<<"th">>)),
+    #{path := "foo"} =
+        uri_string:parse(lists:append("fo",<<"o">>)).
+
+parse_special(_Config) ->
+    #{host := [],query := []} = uri_string:parse("//?"),
+    #{fragment := [],host := []} = uri_string:parse("//#"),
+    #{host := [],query := [],scheme := "foo"} = uri_string:parse("foo://?"),
+    #{fragment := [],host := [],scheme := "foo"} = uri_string:parse("foo://#"),
+    #{host := <<>>, path := <<"/">>} = uri_string:parse(<<"///">>),
+    #{host := <<"hostname">>} = uri_string:parse(<<"//hostname">>),
+    #{host := <<>>, path := <<"/hostname">>} = uri_string:parse(<<"///hostname">>),
+    #{host :=  [],path := "/",query := []} = uri_string:parse("///?"),
+    #{fragment := [],host := [],path := "/"} = uri_string:parse("///#"),
+    #{host := "foo",query := []} = uri_string:parse("//foo?"),
+    #{fragment := [],host := "foo"} = uri_string:parse("//foo#"),
+    #{host := "foo",path := "/"} = uri_string:parse("//foo/"),
+    #{host := "foo",query := [],scheme := "http"} = uri_string:parse("http://foo?"),
+    #{fragment := [],host := "foo",scheme := "http"} = uri_string:parse("http://foo#"),
+    #{host := "foo",path := "/",scheme := "http"} = uri_string:parse("http://foo/"),
+    #{fragment := [],host := "host",port := 80,scheme := "http"} = uri_string:parse("http://host:80#"),
+    #{host := "host",port := 80,query := [],scheme := "http"} = uri_string:parse("http://host:80?"),
+    #{path := [],query := []} = uri_string:parse("?"),
+    #{path := [],query := "?"} = uri_string:parse("??"),
+    #{path := [],query := "??"} = uri_string:parse("???").
+
+parse_special2(_Config) ->
+    #{host := [],path := "/",port := 1,scheme := "a"} = uri_string:parse("a://:1/"),
+    #{path := "/a/",scheme := "a"} = uri_string:parse("a:/a/"),
+    #{host := [],path := [],userinfo := []} = uri_string:parse("//@"),
+    #{host := [],path := [],scheme := "foo",userinfo := []} = uri_string:parse("foo://@"),
+    #{host := [],path := "/",userinfo := []} = uri_string:parse("//@/"),
+    #{host := [],path := "/",scheme := "foo",userinfo := []} = uri_string:parse("foo://@/"),
+    #{host := "localhost",path := "/",port := undefined} = uri_string:parse("//localhost:/"),
+    #{host := [],path := [],port := undefined} = uri_string:parse("//:").
+
+parse_negative(_Config) ->
+    {error,invalid_uri,"å"} = uri_string:parse("å"),
+    {error,invalid_uri,"å"} = uri_string:parse("aå:/foo"),
+    {error,invalid_uri,":"} = uri_string:parse("foo://usär@host"),
+    {error,invalid_uri,"ö"} = uri_string:parse("//host/path?foö=bar"),
+    {error,invalid_uri,"ö"} = uri_string:parse("//host/path#foö"),
+    {error,invalid_uri,"127.256.0.1"} = uri_string:parse("//127.256.0.1"),
+    {error,invalid_uri,":::127.0.0.1"} = uri_string:parse("//[:::127.0.0.1]"),
+    {error,invalid_utf8,<<0,0,0,246>>} = uri_string:parse("//%00%00%00%F6"),
+    {error,invalid_uri,"A"} = uri_string:parse("//localhost:A8").
+
+
+%%-------------------------------------------------------------------------
+%% Recompose tests
+%%-------------------------------------------------------------------------
+recompose_fragment(_Config) ->
+    <<?FRAGMENT_ENC>> = uri_string:recompose(#{fragment => <<?FRAGMENT/utf8>>, path => <<>>}),
+    ?FRAGMENT_ENC = uri_string:recompose(#{fragment => ?FRAGMENT, path => ""}).
+
+recompose_parse_fragment(_Config) ->
+    <<?FRAGMENT_ENC>> = uri_string:recompose(uri_string:parse(<<?FRAGMENT_ENC>>)),
+    ?FRAGMENT_ENC = uri_string:recompose(uri_string:parse(?FRAGMENT_ENC)).
+
+recompose_query(_Config) ->
+    <<?QUERY_ENC>> =
+        uri_string:recompose(#{query => <<?QUERY/utf8>>, path => <<>>}),
+    <<?QUERY_ENC?FRAGMENT_ENC>> =
+        uri_string:recompose(#{query => <<?QUERY/utf8>>,
+                               fragment => <<?FRAGMENT/utf8>>,
+                               path => <<>>}),
+    "?name=%C3%B6rn" =
+        uri_string:recompose(#{query => "name=örn", path => ""}),
+    "?name=%C3%B6rn#n%C3%A4sa" =
+        uri_string:recompose(#{query => "name=örn",
+                               fragment => "näsa",
+                               path => ""}).
+
+recompose_parse_query(_Config) ->
+    <<"?name=%C3%B6rn">> = uri_string:recompose(uri_string:parse(<<"?name=%C3%B6rn">>)),
+    <<"?name=%C3%B6rn#n%C3%A4sa">> =
+        uri_string:recompose(uri_string:parse(<<"?name=%C3%B6rn#n%C3%A4sa">>)),
+    "?name=%C3%B6rn" = uri_string:recompose(uri_string:parse("?name=%C3%B6rn")),
+    "?name=%C3%B6rn#n%C3%A4sa" = uri_string:recompose(uri_string:parse("?name=%C3%B6rn#n%C3%A4sa")).
+
+recompose_path(_Config) ->
+    <<"/d%C3%A4r">> =
+        uri_string:recompose(#{path => <<"/där"/utf8>>}),
+    <<"/d%C3%A4r#n%C3%A4sa">> =
+        uri_string:recompose(#{path => <<"/där"/utf8>>,
+                               fragment => <<"näsa"/utf8>>}),
+    <<"/d%C3%A4r?name=%C3%B6rn">> =
+        uri_string:recompose(#{path => <<"/där"/utf8>>,
+                               query => <<"name=örn"/utf8>>}),
+    <<"/d%C3%A4r?name=%C3%B6rn#n%C3%A4sa">> =
+        uri_string:recompose(#{path => <<"/där"/utf8>>,
+                               query => <<"name=örn"/utf8>>,
+                               fragment => <<"näsa"/utf8>>}),
+
+
+    "/d%C3%A4r" =
+        uri_string:recompose(#{path => "/där"}),
+    "/d%C3%A4r#n%C3%A4sa" =
+        uri_string:recompose(#{path => "/där",
+                               fragment => "näsa"}),
+    "/d%C3%A4r?name=%C3%B6rn" =
+        uri_string:recompose(#{path => "/där",
+                               query => "name=örn"}),
+    "/d%C3%A4r?name=%C3%B6rn#n%C3%A4sa" =
+        uri_string:recompose(#{path => "/där",
+                               query => "name=örn",
+                               fragment => "näsa"}).
+
+
+recompose_parse_path(_Config) ->
+    <<"/d%C3%A4r">> =
+        uri_string:recompose(uri_string:parse(<<"/d%C3%A4r">>)),
+    <<"/d%C3%A4r#n%C3%A4sa">> =
+        uri_string:recompose(uri_string:parse(<<"/d%C3%A4r#n%C3%A4sa">>)),
+    <<"/d%C3%A4r?name=%C3%B6rn">> =
+        uri_string:recompose(uri_string:parse(<<"/d%C3%A4r?name=%C3%B6rn">>)),
+
+    "/d%C3%A4r" =
+        uri_string:recompose(uri_string:parse("/d%C3%A4r")),
+    "/d%C3%A4r#n%C3%A4sa" =
+        uri_string:recompose(uri_string:parse("/d%C3%A4r#n%C3%A4sa")),
+    "/d%C3%A4r?name=%C3%B6rn" =
+        uri_string:recompose(uri_string:parse("/d%C3%A4r?name=%C3%B6rn")).
+
+
+recompose_autogen(_Config) ->
+    Tests = generate_test_vectors(uri_combinations()),
+    lists:map(fun run_test_recompose/1, Tests).
+
+parse_recompose_autogen(_Config) ->
+    Tests = generate_test_vectors(uri_combinations()),
+    lists:map(fun run_test_parse_recompose/1, Tests).
+
+transcode_basic(_Config) ->
+    <<"foo%C3%B6bar"/utf8>> =
+        uri_string:transcode(<<"foo%00%00%00%F6bar"/utf32>>, [{in_encoding, utf32},{out_encoding, utf8}]),
+    "foo%C3%B6bar" =
+        uri_string:transcode("foo%00%00%00%F6bar", [{in_encoding, utf32},{out_encoding, utf8}]),
+    <<"foo%00%00%00%F6bar"/utf32>> =
+        uri_string:transcode(<<"foo%C3%B6bar"/utf8>>, [{in_encoding, utf8},{out_encoding, utf32}]),
+    "foo%00%00%00%F6bar" =
+        uri_string:transcode("foo%C3%B6bar", [{in_encoding, utf8},{out_encoding, utf32}]),
+    "foo%C3%B6bar" =
+        uri_string:transcode("foo%F6bar", [{in_encoding, latin1},{out_encoding, utf8}]).
+
+transcode_options(_Config) ->
+    <<"foo%C3%B6bar"/utf8>> =
+        uri_string:transcode(<<"foo%C3%B6bar"/utf8>>, []),
+    <<"foo%C3%B6bar"/utf8>> =
+        uri_string:transcode(<<"foo%00%00%00%F6bar"/utf32>>, [{in_encoding, utf32}]),
+    <<"foo%00%00%00%F6bar"/utf32>> =
+        uri_string:transcode(<<"foo%C3%B6bar"/utf8>>, [{out_encoding, utf32}]).
+
+transcode_mixed(_Config) ->
+    "foo%00%00%00%F6bar" =
+        uri_string:transcode(["foo",<<"%C3%B6"/utf8>>,<<"ba"/utf8>>,"r"], [{out_encoding, utf32}]),
+    "foo%00%00%00%F6bar" =
+        uri_string:transcode(["foo",<<"%C3%"/utf8>>,<<"B6ba"/utf8>>,"r"], [{out_encoding, utf32}]),
+    "foo%C3%B6bar" =
+        uri_string:transcode(["foo%00", <<"%00%0"/utf32>>,<<"0%F"/utf32>>,"6bar"], [{in_encoding, utf32},{out_encoding, utf8}]).
+
+transcode_negative(_Config) ->
+    {error,invalid_percent_encoding,"%BXbar"} =
+        uri_string:transcode(<<"foo%C3%BXbar"/utf8>>, [{in_encoding, utf8},{out_encoding, utf32}]),
+    {error,invalid_input,<<"ö">>} =
+        uri_string:transcode("foo%F6bar", [{in_encoding, utf8},{out_encoding, utf8}]).
+
+compose_query(_Config) ->
+    [] = uri_string:compose_query([]),
+    "foo=1&bar=2" = uri_string:compose_query([{<<"foo">>,"1"}, {"bar", "2"}]),
+    "foo=1&b%C3%A4r=2" = uri_string:compose_query([{"foo","1"}, {"bär", "2"}],[{encoding,utf8}]),
+    "foo=1&b%C3%A4r=2" = uri_string:compose_query([{"foo","1"}, {"bär", "2"}],[{encoding,unicode}]),
+    "foo=1&b%E4r=2" = uri_string:compose_query([{"foo","1"}, {"bär", "2"}],[{encoding,latin1}]),
+    "foo+bar=1&%E5%90%88=2" = uri_string:compose_query([{"foo bar","1"}, {"合", "2"}]),
+    "foo+bar=1&%26%2321512%3B=2" =
+        uri_string:compose_query([{"foo bar","1"}, {"合", "2"}],[{encoding,latin1}]),
+    "foo+bar=1&%C3%B6=2" = uri_string:compose_query([{<<"foo bar">>,<<"1">>}, {"ö", <<"2">>}]),
+    <<"foo+bar=1&%C3%B6=2">> =
+        uri_string:compose_query([{<<"foo bar">>,<<"1">>}, {<<"ö"/utf8>>, <<"2">>}]).
+
+compose_query_latin1(_Config) ->
+    Q = uri_string:compose_query([{"合foö bar","1"}, {"合", "合"}],[{encoding,latin1}]),
+    Q1 = uri_string:transcode(Q, [{in_encoding, latin1}]),
+    [{"合foö bar","1"}, {"合", "合"}] = uri_string:dissect_query(Q1),
+    Q2 = uri_string:compose_query([{<<"合foö bar"/utf8>>,<<"1">>}, {<<"合"/utf8>>, <<"合"/utf8>>}],
+                                  [{encoding,latin1}]),
+    Q3 = uri_string:transcode(Q2, [{in_encoding, latin1}]),
+    [{<<"合foö bar"/utf8>>,<<"1">>}, {<<"合"/utf8>>, <<"合"/utf8>>}] =
+        uri_string:dissect_query(Q3).
+
+compose_query_negative(_Config) ->
+    {error,invalid_input,4} = uri_string:compose_query([{"",4}]),
+    {error,invalid_input,5} = uri_string:compose_query([{5,""}]),
+    {error,invalid_encoding,utf16} =
+        uri_string:compose_query([{"foo bar","1"}, {<<"ö">>, "2"}],[{encoding,utf16}]).
+
+dissect_query(_Config) ->
+    [] = uri_string:dissect_query(""),
+    [{"foo","1"}, {"amp;bar", "2"}] = uri_string:dissect_query("foo=1&amp;bar=2"),
+    [{"foo","1"}, {"bar", "2"}] = uri_string:dissect_query("foo=1&bar=2"),
+    [{"foo","1;bar=2"}] = uri_string:dissect_query("foo=1;bar=2"),
+    [{"foo","1"}, {"bar", "222"}] = uri_string:dissect_query([<<"foo=1&bar=2">>,"22"]),
+    [{"foo","ö"}, {"bar", "2"}] = uri_string:dissect_query("foo=%C3%B6&bar=2"),
+    [{<<"foo">>,<<"ö"/utf8>>}, {<<"bar">>, <<"2">>}] =
+        uri_string:dissect_query(<<"foo=%C3%B6&bar=2">>),
+    [{"foo bar","1"},{"ö","2"}] =
+        uri_string:dissect_query([<<"foo+bar=1&">>,<<"%C3%B6=2">>]),
+    [{"foo bar","1"},{[21512],"2"}] =
+        uri_string:dissect_query("foo+bar=1&%26%2321512%3B=2"),
+    [{<<"foo bar">>,<<"1">>},{<<"合"/utf8>>,<<"2">>}] =
+        uri_string:dissect_query(<<"foo+bar=1&%26%2321512%3B=2">>),
+    [{"föo bar","1"},{"ö","2"}] =
+        uri_string:dissect_query("föo+bar=1&%C3%B6=2"),
+    [{<<"föo bar"/utf8>>,<<"1">>},{<<"ö"/utf8>>,<<"2">>}] =
+        uri_string:dissect_query(<<"föo+bar=1&%C3%B6=2"/utf8>>).
+
+dissect_query_negative(_Config) ->
+    {error,missing_value,"&"} =
+        uri_string:dissect_query("foo1&bar=2"),
+    {error,invalid_percent_encoding,"%XX%B6"} = uri_string:dissect_query("foo=%XX%B6&amp;bar=2"),
+    {error,invalid_input,[153]} =
+        uri_string:dissect_query("foo=%99%B6&amp;bar=2"),
+    {error,invalid_character,"ö"} = uri_string:dissect_query(<<"föo+bar=1&%C3%B6=2">>),
+    {error,invalid_input,<<"ö">>} =
+        uri_string:dissect_query([<<"foo+bar=1&amp;">>,<<"%C3%B6=2ö">>]).
+
+normalize(_Config) ->
+    "/a/g" = uri_string:normalize("/a/b/c/./../../g"),
+    <<"mid/6">> = uri_string:normalize(<<"mid/content=5/../6">>),
+    "http://localhost-%C3%B6rebro/a/g" =
+        uri_string:normalize("http://localhos%74-%c3%b6rebro:80/a/b/c/./../../g"),
+    <<"http://localhost-%C3%B6rebro/a/g">> =
+        uri_string:normalize(<<"http://localhos%74-%c3%b6rebro:80/a/b/c/./../../g">>),
+    <<"https://localhost/">> =
+        uri_string:normalize(<<"https://localhost:443">>),
+    <<"https://localhost:445/">> =
+        uri_string:normalize(<<"https://localhost:445">>),
+    <<"ftp://localhost">> =
+        uri_string:normalize(<<"ftp://localhost:21">>),
+    <<"ssh://localhost">> =
+        uri_string:normalize(<<"ssh://localhost:22">>),
+    <<"sftp://localhost">> =
+        uri_string:normalize(<<"sftp://localhost:22">>),
+    <<"tftp://localhost">> =
+        uri_string:normalize(<<"tftp://localhost:69">>).
+
+normalize_map(_Config) ->
+    "/a/g" = uri_string:normalize(#{path => "/a/b/c/./../../g"}),
+    <<"mid/6">> = uri_string:normalize(#{path => <<"mid/content=5/../6">>}),
+    "http://localhost-%C3%B6rebro/a/g" =
+        uri_string:normalize(#{scheme => "http",port => 80,path => "/a/b/c/./../../g",
+                               host => "localhost-örebro"}),
+    <<"http://localhost-%C3%B6rebro/a/g">> =
+        uri_string:normalize(#{scheme => <<"http">>,port => 80,
+                               path => <<"/a/b/c/./../../g">>,
+                               host => <<"localhost-örebro"/utf8>>}),
+    <<"https://localhost/">> =
+        uri_string:normalize(#{scheme => <<"https">>,port => 443,path => <<>>,
+                               host => <<"localhost">>}),
+    <<"https://localhost:445/">> =
+        uri_string:normalize(#{scheme => <<"https">>,port => 445,path => <<>>,
+                               host => <<"localhost">>}),
+    <<"ftp://localhost">> =
+        uri_string:normalize(#{scheme => <<"ftp">>,port => 21,path => <<>>,
+                               host => <<"localhost">>}),
+    <<"ssh://localhost">> =
+        uri_string:normalize(#{scheme => <<"ssh">>,port => 22,path => <<>>,
+                               host => <<"localhost">>}),
+    <<"sftp://localhost">> =
+        uri_string:normalize(#{scheme => <<"sftp">>,port => 22,path => <<>>,
+                               host => <<"localhost">>}),
+    <<"tftp://localhost">> =
+        uri_string:normalize(#{scheme => <<"tftp">>,port => 69,path => <<>>,
+                               host => <<"localhost">>}).
+
+normalize_return_map(_Config) ->
+    #{scheme := "http",path := "/a/g",host := "localhost-örebro"} =
+        uri_string:normalize("http://localhos%74-%c3%b6rebro:80/a/b/c/./../../g",
+                                   [return_map]),
+    #{scheme := <<"http">>,path := <<"/a/g">>, host := <<"localhost-örebro"/utf8>>} =
+        uri_string:normalize(<<"http://localhos%74-%c3%b6rebro:80/a/b/c/./../../g">>,
+                                   [return_map]),
+    #{scheme := <<"https">>,path := <<"/">>, host := <<"localhost">>} =
+        uri_string:normalize(#{scheme => <<"https">>,port => 443,path => <<>>,
+                               host => <<"localhost">>}, [return_map]).
+
+normalize_negative(_Config) ->
+    {error,invalid_uri,":"} =
+        uri_string:normalize("http://local>host"),
+    {error,invalid_uri,":"} =
+        uri_string:normalize(<<"http://local>host">>),
+    {error,invalid_uri,":"} =
+        uri_string:normalize("http://[192.168.0.1]", [return_map]),
+    {error,invalid_uri,":"} =
+        uri_string:normalize(<<"http://[192.168.0.1]">>, [return_map]).
+
+interop_query_utf8(_Config) ->
+    Q = uri_string:compose_query([{"foo bar","1"}, {"合", "2"}]),
+    Uri = uri_string:recompose(#{path => "/", query => Q}),
+    #{query := Q1} = uri_string:parse(Uri),
+    [{"foo bar","1"}, {"合", "2"}] = uri_string:dissect_query(Q1).
+
+interop_query_latin1(_Config) ->
+    Q = uri_string:compose_query([{"foo bar","1"}, {"合", "2"}], [{encoding,latin1}]),
+    Uri = uri_string:recompose(#{path => "/", query => Q}),
+    Uri1 = uri_string:transcode(Uri, [{in_encoding, latin1}]),
+    #{query := Q1} = uri_string:parse(Uri1),
+    [{"foo bar","1"}, {"合", "2"}] = uri_string:dissect_query(Q1).
diff --git a/lib/stdlib/test/uri_string_property_test_SUITE.erl b/lib/stdlib/test/uri_string_property_test_SUITE.erl
new file mode 100644
index 0000000000..ae2c61c7aa
--- /dev/null
+++ b/lib/stdlib/test/uri_string_property_test_SUITE.erl
@@ -0,0 +1,39 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(uri_string_property_test_SUITE).
+
+-include_lib("common_test/include/ct.hrl").
+-compile(export_all).
+
+all() -> [recompose].
+
+init_per_suite(Config) ->
+    ct_property_test:init_per_suite(Config).
+
+end_per_suite(Config) ->
+    Config.
+
+%%%========================================================================
+%%% Test suites
+%%%========================================================================
+recompose(Config) ->
+    ct_property_test:quickcheck(
+      uri_string_recompose:prop_recompose(),
+      Config).
diff --git a/lib/stdlib/test/zip_SUITE.erl b/lib/stdlib/test/zip_SUITE.erl
index 1dfcda4ed0..e5ba629c55 100644
--- a/lib/stdlib/test/zip_SUITE.erl
+++ b/lib/stdlib/test/zip_SUITE.erl
@@ -909,8 +909,7 @@ do_fd_leak(Bad, N) ->
         ok ->
             do_fd_leak(Bad, N + 1)
     catch
-        C:R ->
-            Stk = erlang:get_stacktrace(),
+        C:R:Stk ->
             io:format("Bad error after ~p attempts\n", [N]),
             erlang:raise(C, R, Stk)
     end.
diff --git a/lib/stdlib/uc_spec/gen_unicode_mod.escript b/lib/stdlib/uc_spec/gen_unicode_mod.escript
index 674e5a0628..fe5a860d45 100755
--- a/lib/stdlib/uc_spec/gen_unicode_mod.escript
+++ b/lib/stdlib/uc_spec/gen_unicode_mod.escript
@@ -170,7 +170,7 @@ gen_header(Fd) ->
     io:put_chars(Fd, "-export([spec_version/0, lookup/1, get_case/1]).\n"),
     io:put_chars(Fd, "-inline([class/1]).\n"),
     io:put_chars(Fd, "-compile(nowarn_unused_vars).\n"),
-    io:put_chars(Fd, "-dialyzer({no_improper_lists, [cp/1, gc_prepend/2, gc_e_cont/2]}).\n"),
+    io:put_chars(Fd, "-dialyzer({no_improper_lists, [cp/1, gc/1, gc_prepend/2, gc_e_cont/2]}).\n"),
     io:put_chars(Fd, "-type gc() :: char()|[char()].\n\n\n"),
     ok.
 
@@ -240,7 +240,7 @@ gen_norm(Fd) ->
                  "-spec nfd(unicode:chardata()) -> maybe_improper_list(gc(),unicode:chardata()) | {error, unicode:chardata()}.\n"
                  "nfd(Str0) ->\n"
                  "    case gc(Str0) of\n"
-                 "        [GC|R] when GC < 127 -> [GC|R];\n"
+                 "        [GC|R] when GC < 128 -> [GC|R];\n"
                  "        [GC|Str] -> [decompose(GC)|Str];\n"
                  "        [] -> [];\n"
                  "        {error,_}=Error -> Error\n    end.\n\n"
@@ -250,7 +250,7 @@ gen_norm(Fd) ->
                  "-spec nfkd(unicode:chardata()) -> maybe_improper_list(gc(),unicode:chardata()) | {error, unicode:chardata()}.\n"
                  "nfkd(Str0) ->\n"
                  "    case gc(Str0) of\n"
-                 "        [GC|R] when GC < 127 -> [GC|R];\n"
+                 "        [GC|R] when GC < 128 -> [GC|R];\n"
                  "        [GC|Str] -> [decompose_compat(GC)|Str];\n"
                  "        [] -> [];\n"
                  "        {error,_}=Error -> Error\n    end.\n\n"
@@ -260,7 +260,7 @@ gen_norm(Fd) ->
                  "-spec nfc(unicode:chardata()) -> maybe_improper_list(gc(),unicode:chardata()) | {error, unicode:chardata()}.\n"
                  "nfc(Str0) ->\n"
                  "    case gc(Str0) of\n"
-                 "        [GC|R] when GC < 255 -> [GC|R];\n"
+                 "        [GC|R] when GC < 256 -> [GC|R];\n"
                  "        [GC|Str] -> [compose(decompose(GC))|Str];\n"
                  "        [] -> [];\n"
                  "        {error,_}=Error -> Error\n    end.\n\n"
@@ -270,7 +270,7 @@ gen_norm(Fd) ->
                  "-spec nfkc(unicode:chardata()) -> maybe_improper_list(gc(),unicode:chardata()) | {error, unicode:chardata()}.\n"
                  "nfkc(Str0) ->\n"
                  "    case gc(Str0) of\n"
-                 "        [GC|R] when GC < 127 -> [GC|R];\n"
+                 "        [GC|R] when GC < 128 -> [GC|R];\n"
                  "        [GC|Str] -> [compose_compat_0(decompose_compat(GC))|Str];\n"
                  "        [] -> [];\n"
                  "        {error,_}=Error -> Error\n    end.\n\n"
@@ -476,13 +476,30 @@ gen_gc(Fd, GBP) ->
                  "-spec gc(String::unicode:chardata()) ->"
                  " maybe_improper_list() | {error, unicode:chardata()}.\n"),
     io:put_chars(Fd,
+                 "gc([CP1, CP2|_]=T)\n"
+                 "  when CP1 < 256, CP2 < 256, CP1 =/= $\r -> %% Ascii Fast path\n"
+                 "       T;\n"
+                 "gc(<<CP1/utf8, Rest/binary>>) ->\n"
+                 "    if CP1 < 256, CP1 =/= $\r ->\n"
+                 "           case Rest of\n"
+                 "               <<CP2/utf8, _/binary>> when CP2 < 256 -> %% Ascii Fast path\n"
+                 "                   [CP1|Rest];\n"
+                 "               _ -> gc_1([CP1|Rest])\n"
+                 "           end;\n"
+                 "      true -> gc_1([CP1|Rest])\n"
+                 "    end;\n"
                  "gc(Str) ->\n"
                  "    gc_1(cp(Str)).\n\n"
                  "gc_1([$\\r|R0] = R) ->\n"
                  "    case cp(R0) of % Don't break CRLF\n"
                  "        [$\\n|R1] -> [[$\\r,$\\n]|R1];\n"
                  "        _ -> R\n"
-                 "    end;\n"),
+                 "    end;\n"
+                 %% "gc_1([CP1, CP2|_]=T) when CP1 < 256, CP2 < 256 ->\n"
+                 %% "    T;  %% Fast path\n"
+                 %% "gc_1([CP1|<<CP2/utf8, _/binary>>]=T) when CP1 < 256, CP2 < 256 ->\n"
+                 %% "    T;  %% Fast path\n"
+                ),
 
     io:put_chars(Fd, "%% Handle control\n"),
     GenControl = fun(Range) -> io:format(Fd, "gc_1~s R0;\n", [gen_clause(Range)]) end,
@@ -490,7 +507,7 @@ gen_gc(Fd, GBP) ->
     [R1,R2,R3|Crs] = CRs0,
     [GenControl(CP) || CP <- merge_ranges([R1,R2,R3], split), CP =/= {$\r, undefined}],
     %%GenControl(R1),GenControl(R2),GenControl(R3),
-    io:format(Fd, "gc_1([CP|R]) when CP < 255 -> gc_extend(R,CP);\n", []),
+    io:format(Fd, "gc_1([CP|R]) when CP < 256 -> gc_extend(R,CP);\n", []),
     [GenControl(CP) || CP <- Crs],
     %% One clause per CP
     %% CRs0 = merge_ranges(maps:get(cr, GBP) ++ maps:get(lf, GBP) ++ maps:get(control, GBP)),
diff --git a/lib/stdlib/vsn.mk b/lib/stdlib/vsn.mk
index 48db5dc900..09a4d6fb50 100644
--- a/lib/stdlib/vsn.mk
+++ b/lib/stdlib/vsn.mk
@@ -1 +1 @@
-STDLIB_VSN = 3.4.2
+STDLIB_VSN = 3.4.5
diff --git a/lib/syntax_tools/doc/src/notes.xml b/lib/syntax_tools/doc/src/notes.xml
index 8c91f01e3b..bd2bcde2c2 100644
--- a/lib/syntax_tools/doc/src/notes.xml
+++ b/lib/syntax_tools/doc/src/notes.xml
@@ -32,6 +32,21 @@
   <p>This document describes the changes made to the Syntax_Tools
     application.</p>
 
+<section><title>Syntax_Tools 2.1.4</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Syntax_Tools 2.1.3</title>
 
     <section><title>Improvements and New Features</title>
diff --git a/lib/syntax_tools/src/erl_prettypr.erl b/lib/syntax_tools/src/erl_prettypr.erl
index 40ddd2b22a..60a15c8e3f 100644
--- a/lib/syntax_tools/src/erl_prettypr.erl
+++ b/lib/syntax_tools/src/erl_prettypr.erl
@@ -774,9 +774,16 @@ lay_2(Node, Ctxt) ->
 	class_qualifier ->
 	    Ctxt1 = set_prec(Ctxt, max_prec()),
 	    D1 = lay(erl_syntax:class_qualifier_argument(Node), Ctxt1),
-	    D2 = lay(erl_syntax:class_qualifier_body(Node), Ctxt1),
-	    beside(D1, beside(text(":"), D2));
-
+            D2 = lay(erl_syntax:class_qualifier_body(Node), Ctxt1),
+            Stacktrace = erl_syntax:class_qualifier_stacktrace(Node),
+            case erl_syntax:variable_name(Stacktrace) of
+                '_' ->
+                    beside(D1, beside(text(":"), D2));
+                _ ->
+                    D3 = lay(Stacktrace, Ctxt1),
+                    beside(D1, beside(beside(text(":"), D2),
+                                      beside(text(":"), D3)))
+            end;
 	comment ->
 	    D = stack_comment_lines(
 		  erl_syntax:comment_text(Node)),
diff --git a/lib/syntax_tools/src/erl_syntax.erl b/lib/syntax_tools/src/erl_syntax.erl
index 9b2b503762..b816c0699c 100644
--- a/lib/syntax_tools/src/erl_syntax.erl
+++ b/lib/syntax_tools/src/erl_syntax.erl
@@ -342,8 +342,10 @@
 	 typed_record_field_body/1,
          typed_record_field_type/1,
 	 class_qualifier/2,
+	 class_qualifier/3,
 	 class_qualifier_argument/1,
 	 class_qualifier_body/1,
+	 class_qualifier_stacktrace/1,
 	 tuple/1,
 	 tuple_elements/1,
 	 tuple_size/1,
@@ -3884,7 +3886,7 @@ fold_try_clause({clause, Pos, [P], Guard, Body}) ->
 	     class_qualifier ->
 		 {tuple, Pos, [class_qualifier_argument(P),
 			       class_qualifier_body(P),
-			       {var, Pos, '_'}]};
+			       class_qualifier_stacktrace(P)]};
 	     _ ->
 		 {tuple, Pos, [{atom, Pos, throw}, P, {var, Pos, '_'}]}
 	 end,
@@ -3893,12 +3895,14 @@ fold_try_clause({clause, Pos, [P], Guard, Body}) ->
 unfold_try_clauses(Cs) ->
     [unfold_try_clause(C) || C <- Cs].
 
-unfold_try_clause({clause, Pos, [{tuple, _, [{atom, _, throw}, V, _]}],
+unfold_try_clause({clause, Pos, [{tuple, _, [{atom, _, throw},
+                                             V,
+                                             [{var, _, '_'}]]}],
 		   Guard, Body}) ->
     {clause, Pos, [V], Guard, Body};
-unfold_try_clause({clause, Pos, [{tuple, _, [C, V, _]}],
+unfold_try_clause({clause, Pos, [{tuple, _, [C, V, Stacktrace]}],
 		   Guard, Body}) ->
-    {clause, Pos, [class_qualifier(C, V)], Guard, Body}.
+    {clause, Pos, [class_qualifier(C, V, Stacktrace)], Guard, Body}.
 
 
 %% =====================================================================
@@ -6725,9 +6729,12 @@ try_expr_after(Node) ->
 %%
 %% @see class_qualifier_argument/1
 %% @see class_qualifier_body/1
+%% @see class_qualifier_stacktrace/1
 %% @see try_expr/4
 
--record(class_qualifier, {class :: syntaxTree(), body :: syntaxTree()}).
+-record(class_qualifier, {class :: syntaxTree(),
+                          body :: syntaxTree(),
+                          stacktrace :: syntaxTree()}).
 
 %% type(Node) = class_qualifier
 %% data(Node) = #class_qualifier{class :: Class, body :: Body}
@@ -6737,8 +6744,27 @@ try_expr_after(Node) ->
 -spec class_qualifier(syntaxTree(), syntaxTree()) -> syntaxTree().
 
 class_qualifier(Class, Body) ->
+    Underscore = {var, get_pos(Body), '_'},
     tree(class_qualifier,
-	 #class_qualifier{class = Class, body = Body}).
+	 #class_qualifier{class = Class, body = Body,
+                          stacktrace = Underscore}).
+
+%% =====================================================================
+%% @doc Creates an abstract class qualifier. The result represents
+%% "<code><em>Class</em>:<em>Body</em>:<em>Stacktrace</em></code>".
+%%
+%% @see class_qualifier_argument/1
+%% @see class_qualifier_body/1
+%% @see try_expr/4
+
+-spec class_qualifier(syntaxTree(), syntaxTree(), syntaxTree()) ->
+                             syntaxTree().
+
+class_qualifier(Class, Body, Stacktrace) ->
+    tree(class_qualifier,
+	 #class_qualifier{class = Class,
+                          body = Body,
+                          stacktrace = Stacktrace}).
 
 
 %% =====================================================================
@@ -6763,6 +6789,16 @@ class_qualifier_argument(Node) ->
 class_qualifier_body(Node) ->
     (data(Node))#class_qualifier.body.
 
+%% =====================================================================
+%% @doc Returns the stacktrace subtree of a `class_qualifier' node.
+%%
+%% @see class_qualifier/2
+
+-spec class_qualifier_stacktrace(syntaxTree()) -> syntaxTree().
+
+class_qualifier_stacktrace(Node) ->
+    (data(Node))#class_qualifier.stacktrace.
+
 
 %% =====================================================================
 %% @doc Creates an abstract "implicit fun" expression. If
@@ -7727,8 +7763,9 @@ subtrees(T) ->
 		catch_expr ->
 		    [[catch_expr_body(T)]];
 		class_qualifier ->
-		    [[class_qualifier_argument(T)],
-		     [class_qualifier_body(T)]];
+                    [[class_qualifier_argument(T)],
+                     [class_qualifier_body(T)],
+                     [class_qualifier_stacktrace(T)]];
 		clause ->
 		    case clause_guard(T) of
 			none ->
@@ -7949,6 +7986,7 @@ make_tree(block_expr, [B]) -> block_expr(B);
 make_tree(case_expr, [[A], C]) -> case_expr(A, C);
 make_tree(catch_expr, [[B]]) -> catch_expr(B);
 make_tree(class_qualifier, [[A], [B]]) -> class_qualifier(A, B);
+make_tree(class_qualifier, [[A], [B], [C]]) -> class_qualifier(A, B, C);
 make_tree(clause, [P, B]) -> clause(P, none, B);
 make_tree(clause, [P, [G], B]) -> clause(P, G, B);
 make_tree(cond_expr, [C]) -> cond_expr(C);
diff --git a/lib/syntax_tools/vsn.mk b/lib/syntax_tools/vsn.mk
index e0880d61ee..8d37c40742 100644
--- a/lib/syntax_tools/vsn.mk
+++ b/lib/syntax_tools/vsn.mk
@@ -1 +1 @@
-SYNTAX_TOOLS_VSN = 2.1.3
+SYNTAX_TOOLS_VSN = 2.1.4
diff --git a/lib/tools/doc/src/Makefile b/lib/tools/doc/src/Makefile
index 7011f869cd..b554781382 100644
--- a/lib/tools/doc/src/Makefile
+++ b/lib/tools/doc/src/Makefile
@@ -58,8 +58,7 @@ XML_CHAPTER_FILES = \
 	lcnt_chapter.xml \
 	erlang_mode_chapter.xml \
 	xref_chapter.xml \
-	notes.xml \
-	notes_history.xml
+	notes.xml
 
 
 BOOK_FILES = book.xml
diff --git a/lib/tools/doc/src/lcnt.xml b/lib/tools/doc/src/lcnt.xml
index 5bdfc60448..0c24375b91 100644
--- a/lib/tools/doc/src/lcnt.xml
+++ b/lib/tools/doc/src/lcnt.xml
@@ -371,7 +371,7 @@
 		<v>Serial = integer()</v>
 	    </type>
 	    <desc>
-		<p>Creates a process id with creation 0. Example:</p>
+		<p>Creates a process id with creation 0.</p>
 	    </desc>
 	</func>
 
diff --git a/lib/tools/doc/src/notes.xml b/lib/tools/doc/src/notes.xml
index 3eaa2058a0..45f276c09e 100644
--- a/lib/tools/doc/src/notes.xml
+++ b/lib/tools/doc/src/notes.xml
@@ -31,6 +31,61 @@
   </header>
   <p>This document describes the changes made to the Tools application.</p>
 
+<section><title>Tools 2.11.2</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> A counting bug is corrected in <c>Cover</c>. The bug
+	    was introduced in Erlang/OTP 18.0. </p>
+          <p>
+	    Own Id: OTP-14817 Aux Id: PR 1641 </p>
+        </item>
+        <item>
+	    <p>The <c>lcnt</c> server will no longer crash if
+	    <c>lcnt:information/0</c> is called before
+	    <c>lcnt:collect/0</c>.</p>
+          <p>
+	    Own Id: OTP-14912</p>
+        </item>
+        <item>
+	    <p><c>lcnt:collect</c> will now implicitly start the
+	    <c>lcnt</c> server, as per the documentation.</p>
+          <p>
+	    Own Id: OTP-14913</p>
+        </item>
+      </list>
+    </section>
+
+
+    <section><title>Improvements and New Features</title>
+      <list>
+        <item>
+          <p>
+	    Improved indentation in emacs and various other updates.</p>
+          <p>
+	    Own Id: OTP-14944</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
+<section><title>Tools 2.11.1</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Tools 2.11</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/tools/emacs/Makefile b/lib/tools/emacs/Makefile
index 35c93ba4ed..ea4d6cb723 100644
--- a/lib/tools/emacs/Makefile
+++ b/lib/tools/emacs/Makefile
@@ -54,8 +54,6 @@ EL_FILES = $(EMACS_FILES:%=%.el)
 
 ELC_FILES = $(EMACS_FILES:%=%.elc) 
 
-TEST_FILES = test.erl.indented test.erl.orig
-
 # ----------------------------------------------------
 # Targets
 # ----------------------------------------------------
@@ -75,7 +73,7 @@ include $(ERL_TOP)/make/otp_release_targets.mk
 
 release_spec: opt
 	$(INSTALL_DIR) "$(RELSYSDIR)/emacs"
-	$(INSTALL_DATA) $(EL_FILES) $(README_FILES) $(TEST_FILES) \
+	$(INSTALL_DATA) $(EL_FILES) $(README_FILES) \
 		"$(RELSYSDIR)/emacs"
 
 ifeq ($(DOCTYPE),pdf)
@@ -89,19 +87,3 @@ release_docs_spec: docs
 	$(INSTALL_DATA) $(MAN_FILES) "$(RELEASE_PATH)/man/man3"
 endif
 endif
-
-EMACS ?= emacs
-
-test_indentation:
-	@rm -f test.erl
-	@rm -f test_indent.el
-	@echo '(load "erlang-start")' >> test_indent.el
-	@echo '(find-file "test.erl.orig")' >> test_indent.el
-	@echo "(require 'cl)    ; required with Emacs < 23 for ignore-errors" >> test_indent.el
-	@echo '(erlang-mode)' >> test_indent.el
-	@echo '(toggle-debug-on-error)' >> test_indent.el
-	@echo '(erlang-indent-current-buffer)' >> test_indent.el
-	@echo '(write-file "test.erl")' >> test_indent.el
-	$(EMACS) --batch -Q -L . -l test_indent.el
-	diff -u test.erl.indented test.erl
-	@echo "No differences between expected and actual indentation"
diff --git a/lib/tools/emacs/erlang-skels.el b/lib/tools/emacs/erlang-skels.el
index bdb3d9ad4a..534f50ab33 100644
--- a/lib/tools/emacs/erlang-skels.el
+++ b/lib/tools/emacs/erlang-skels.el
@@ -279,7 +279,8 @@ Please see the function `tempo-define-template'.")
   '((erlang-skel-include erlang-skel-large-header)
     "-behaviour(application)." n n
     "%% Application callbacks" n
-    "-export([start/2, stop/1])." n n
+    "-export([start/2, start_phase/3, stop/1, prep_stop/1," n>
+    "config_change/3])." n n
     (erlang-skel-double-separator-start 3)
     "%%% Application callbacks" n
     (erlang-skel-double-separator-end 3) n
@@ -291,13 +292,14 @@ Please see the function `tempo-define-template'.")
     "%% application. If the application is structured according to the OTP" n
     "%% design principles as a supervision tree, this means starting the" n
     "%% top supervisor of the tree." n
-    "%%" n
-    "%% @spec start(StartType, StartArgs) -> {ok, Pid} |" n
-    "%%                                      {ok, Pid, State} |" n
-    "%%                                      {error, Reason}" n
-    "%%      StartType = normal | {takeover, Node} | {failover, Node}" n
-    "%%      StartArgs = term()" n
     (erlang-skel-separator-end 2)
+    "-spec start(StartType :: normal |" n>
+    "{takeover, Node :: node()} |" n>
+    "{failover, Node :: node()}," n>
+    "StartArgs :: term()) ->" n>
+    "{ok, Pid :: pid()} |" n>
+    "{ok, Pid :: pid(), State :: term()} |" n>
+    "{error, Reason :: term()}." n
     "start(_StartType, _StartArgs) ->" n>
     "case 'TopSupervisor':start_link() of" n>
     "{ok, Pid} ->" n>
@@ -309,15 +311,52 @@ Please see the function `tempo-define-template'.")
     (erlang-skel-separator-start 2)
     "%% @private" n
     "%% @doc" n
+    "%% top supervisor of the tree." n
+    "%% Starts an application with included applications, when" n
+    "%% synchronization is needed between processes in the different" n
+    "%% applications during startup."
+    (erlang-skel-separator-end 2)
+    "-spec start_phase(Phase :: atom()," n>
+    "StartType :: normal |" n>
+    "{takeover, Node :: node()} |" n>
+    "{failover, Node :: node()}," n>
+    "PhaseArgs :: term()) -> ok | {error, Reason :: term()}." n
+    "start_phase(_Phase, _StartType, _PhaseArgs) ->" n>
+    "ok."n
+    n
+    (erlang-skel-separator-start 2)
+    "%% @private" n
+    "%% @doc" n
     "%% This function is called whenever an application has stopped. It" n
     "%% is intended to be the opposite of Module:start/2 and should do" n
     "%% any necessary cleaning up. The return value is ignored." n
-    "%%" n
-    "%% @spec stop(State) -> void()" n
     (erlang-skel-separator-end 2)
+    "-spec stop(State :: term()) -> any()." n
     "stop(_State) ->" n>
     "ok." n
     n
+    (erlang-skel-separator-start 2)
+    "%% @private" n
+    "%% @doc" n
+    "%% This function is called when an application is about to be stopped," n
+    "%% before shutting down the processes of the application." n
+    (erlang-skel-separator-end 2)
+    "-spec prep_stop(State :: term()) -> NewState :: term()." n
+    "prep_stop(State) ->" n>
+    "State." n
+    n
+    (erlang-skel-separator-start 2)
+    "%% @private" n
+    "%% @doc" n
+    "%% This function is called by an application after a code replacement," n
+    "%% if the configuration parameters have changed." n
+    (erlang-skel-separator-end 2)
+    "-spec config_change(Changed :: [{Par :: atom(), Val :: term()}]," n>
+    "New :: [{Par :: atom(), Val :: term()}]," n>
+    "Removed :: [Par :: atom()]) -> ok." n
+    "config_change(_Changed, _New, _Removed) ->" n>
+    "ok." n
+    n
     (erlang-skel-double-separator-start 3)
     "%%% Internal functions" n
     (erlang-skel-double-separator-end 3)
@@ -343,9 +382,12 @@ Please see the function `tempo-define-template'.")
     (erlang-skel-separator-start 2)
     "%% @doc" n
     "%% Starts the supervisor" n
-    "%%" n
-    "%% @spec start_link() -> {ok, Pid} | ignore | {error, Error}" n
     (erlang-skel-separator-end 2)
+    "-spec start_link() -> {ok, Pid :: pid()} |" n>
+    "{error, {already_started, Pid :: pid()}} |" n>
+    "{error, {shutdown, term()}} |" n>
+    "{error, term()} |" n>
+    "ignore." n
     "start_link() ->" n>
     "supervisor:start_link({local, ?SERVER}, ?MODULE, [])." n
     n
@@ -359,11 +401,11 @@ Please see the function `tempo-define-template'.")
     "%% this function is called by the new process to find out about" n
     "%% restart strategy, maximum restart intensity, and child" n
     "%% specifications." n
-    "%%" n
-    "%% @spec init(Args) -> {ok, {SupFlags, [ChildSpec]}} |" n
-    "%%                     ignore |" n
-    "%%                     {error, Reason}" n
     (erlang-skel-separator-end 2)
+    "-spec init(Args :: term()) ->" n>
+    "{ok, {SupFlags :: supervisor:sup_flags()," n>
+    "[ChildSpec :: supervisor:child_spec()]}} |" n>
+    "ignore." n
     "init([]) ->" n
     "" n>
     "SupFlags = #{strategy => one_for_one," n>
@@ -406,9 +448,11 @@ Please see the function `tempo-define-template'.")
     (erlang-skel-separator-start 2)
     "%% @doc" n
     "%% Starts the supervisor bridge" n
-    "%%" n
-    "%% @spec start_link() -> {ok, Pid} | ignore | {error, Error}" n
     (erlang-skel-separator-end 2)
+    "-spec start_link() -> {ok, Pid :: pid()} |" n>
+    "{error, {already_started, Pid :: pid()}} |" n>
+    "{error, term()} |" n>
+    "ignore." n
     "start_link() ->" n>
     "supervisor_bridge:start_link({local, ?SERVER}, ?MODULE, [])." n
     n
@@ -422,11 +466,10 @@ Please see the function `tempo-define-template'.")
     "%% which calls Module:init/1 to start the subsystem. To ensure a" n
     "%% synchronized start-up procedure, this function does not return" n
     "%% until Module:init/1 has returned." n
-    "%%" n
-    "%% @spec init(Args) -> {ok, Pid, State} |" n
-    "%%                     ignore |" n
-    "%%                     {error, Reason}" n
     (erlang-skel-separator-end 2)
+    "-spec init(Args :: term()) -> {ok, Pid :: pid(), State :: term()} |" n>
+    "{error, Error :: term()} |" n>
+    "ignore." n
     "init([]) ->" n>
     "case 'AModule':start_link() of" n>
     "{ok, Pid} ->" n>
@@ -442,10 +485,9 @@ Please see the function `tempo-define-template'.")
     "%% to terminate. It should be the opposite of Module:init/1 and stop" n
     "%% the subsystem and do any necessary cleaning up.The return value is" n
     "%% ignored." n
-    "%%" n
-    "%% @spec terminate(Reason, State) -> void()" n
     (erlang-skel-separator-end 2)
-    "terminate(Reason, State) ->" n>
+    "-spec terminate(Reason :: shutdown | term(), State :: term()) -> any()." n
+    "terminate(_Reason, _State) ->" n>
     "'AModule':stop()," n>
     "ok." n
     n
@@ -464,9 +506,8 @@ Please see the function `tempo-define-template'.")
     "-export([start_link/0])." n n
 
     "%% gen_server callbacks" n
-    "-export([init/1, handle_call/3, handle_cast/2, "
-    "handle_info/2," n>
-    "terminate/2, code_change/3])." n n
+    "-export([init/1, handle_call/3, handle_cast/2, handle_info/2," n>
+    "terminate/2, code_change/3, format_status/2])." n n
 
     "-define(SERVER, ?MODULE)." n n
 
@@ -478,9 +519,11 @@ Please see the function `tempo-define-template'.")
     (erlang-skel-separator-start 2)
     "%% @doc" n
     "%% Starts the server" n
-    "%%" n
-    "%% @spec start_link() -> {ok, Pid} | ignore | {error, Error}" n
     (erlang-skel-separator-end 2)
+    "-spec start_link() -> {ok, Pid :: pid()} |" n>
+    "{error, Error :: {already_started, pid()}} |" n>
+    "{error, Error :: term()} |" n>
+    "ignore." n
     "start_link() ->" n>
     "gen_server:start_link({local, ?SERVER}, ?MODULE, [], [])." n
     n
@@ -492,12 +535,12 @@ Please see the function `tempo-define-template'.")
     "%% @private" n
     "%% @doc" n
     "%% Initializes the server" n
-    "%%" n
-    "%% @spec init(Args) -> {ok, State} |" n
-    "%%                     {ok, State, Timeout} |" n
-    "%%                     ignore |" n
-    "%%                     {stop, Reason}" n
     (erlang-skel-separator-end 2)
+    "-spec init(Args :: term()) -> {ok, State :: term()} |" n>
+    "{ok, State :: term(), Timeout :: timeout()} |" n>
+    "{ok, State :: term(), hibernate} |" n>
+    "{stop, Reason :: term()} |" n>
+    "ignore." n
     "init([]) ->" n>
     "process_flag(trap_exit, true)," n>
     "{ok, #state{}}." n
@@ -506,15 +549,16 @@ Please see the function `tempo-define-template'.")
     "%% @private" n
     "%% @doc" n
     "%% Handling call messages" n
-    "%%" n
-    "%% @spec handle_call(Request, From, State) ->" n
-    "%%                                   {reply, Reply, State} |" n
-    "%%                                   {reply, Reply, State, Timeout} |" n
-    "%%                                   {noreply, State} |" n
-    "%%                                   {noreply, State, Timeout} |" n
-    "%%                                   {stop, Reason, Reply, State} |" n
-    "%%                                   {stop, Reason, State}" n
     (erlang-skel-separator-end 2)
+    "-spec handle_call(Request :: term(), From :: {pid(), term()}, State :: term()) ->" n>
+    "{reply, Reply :: term(), NewState :: term()} |" n>
+    "{reply, Reply :: term(), NewState :: term(), Timeout :: timeout()} |" n>
+    "{reply, Reply :: term(), NewState :: term(), hibernate} |" n>
+    "{noreply, NewState :: term()} |" n>
+    "{noreply, NewState :: term(), Timeout :: timeout()} |" n>
+    "{noreply, NewState :: term(), hibernate} |" n>
+    "{stop, Reason :: term(), Reply :: term(), NewState :: term()} |" n>
+    "{stop, Reason :: term(), NewState :: term()}." n
     "handle_call(_Request, _From, State) ->" n>
     "Reply = ok," n>
     "{reply, Reply, State}." n
@@ -523,23 +567,25 @@ Please see the function `tempo-define-template'.")
     "%% @private" n
     "%% @doc" n
     "%% Handling cast messages" n
-    "%%" n
-    "%% @spec handle_cast(Msg, State) -> {noreply, State} |" n
-    "%%                                  {noreply, State, Timeout} |" n
-    "%%                                  {stop, Reason, State}" n
     (erlang-skel-separator-end 2)
-    "handle_cast(_Msg, State) ->" n>
+    "-spec handle_cast(Request :: term(), State :: term()) ->" n>
+    "{noreply, NewState :: term()} |" n>
+    "{noreply, NewState :: term(), Timeout :: timeout()} |" n>
+    "{noreply, NewState :: term(), hibernate} |" n>
+    "{stop, Reason :: term(), NewState :: term()}." n
+    "handle_cast(_Request, State) ->" n>
     "{noreply, State}." n
     n
     (erlang-skel-separator-start 2)
     "%% @private" n
     "%% @doc" n
     "%% Handling all non call/cast messages" n
-    "%%" n
-    "%% @spec handle_info(Info, State) -> {noreply, State} |" n
-    "%%                                   {noreply, State, Timeout} |" n
-    "%%                                   {stop, Reason, State}" n
     (erlang-skel-separator-end 2)
+    "-spec handle_info(Info :: timeout() | term(), State :: term()) ->" n>
+    "{noreply, NewState :: term()} |" n>
+    "{noreply, NewState :: term(), Timeout :: timeout()} |" n>
+    "{noreply, NewState :: term(), hibernate} |" n>
+    "{stop, Reason :: normal | term(), NewState :: term()}." n
     "handle_info(_Info, State) ->" n>
     "{noreply, State}." n
     n
@@ -550,9 +596,9 @@ Please see the function `tempo-define-template'.")
     "%% terminate. It should be the opposite of Module:init/1 and do any" n
     "%% necessary cleaning up. When it returns, the gen_server terminates" n
     "%% with Reason. The return value is ignored." n
-    "%%" n
-    "%% @spec terminate(Reason, State) -> void()" n
     (erlang-skel-separator-end 2)
+    "-spec terminate(Reason :: normal | shutdown | {shutdown, term()} | term()," n>
+    "State :: term()) -> any()." n
     "terminate(_Reason, _State) ->" n>
     "ok." n
     n
@@ -560,12 +606,26 @@ Please see the function `tempo-define-template'.")
     "%% @private" n
     "%% @doc" n
     "%% Convert process state when code is changed" n
-    "%%" n
-    "%% @spec code_change(OldVsn, State, Extra) -> {ok, NewState}" n
     (erlang-skel-separator-end 2)
+    "-spec code_change(OldVsn :: term() | {down, term()}," n>
+    "State :: term()," n>
+    "Extra :: term()) -> {ok, NewState :: term()} |" n>
+    "{error, Reason :: term()}." n
     "code_change(_OldVsn, State, _Extra) ->" n>
     "{ok, State}." n
     n
+    (erlang-skel-separator-start 2)
+    "%% @private" n
+    "%% @doc" n
+    "%% This function is called for changing the form and appearance" n
+    "%% of gen_server status when it is returned from sys:get_status/1,2" n
+    "%% or when it appears in termination error logs." n
+    (erlang-skel-separator-end 2)
+    "-spec format_status(Opt :: normal | terminate," n>
+    "Status :: list()) -> Status :: term()." n
+    "format_status(_Opt, Status) ->" n>
+    "Status." n
+    n
     (erlang-skel-double-separator-start 3)
     "%%% Internal functions" n
     (erlang-skel-double-separator-end 3)
@@ -581,8 +641,8 @@ Please see the function `tempo-define-template'.")
     "-export([start_link/0, add_handler/0])." n n
 
     "%% gen_event callbacks" n
-    "-export([init/1, handle_event/2, handle_call/2, " n>
-    "handle_info/2, terminate/2, code_change/3])." n n
+    "-export([init/1, handle_event/2, handle_call/2, handle_info/2," n>
+    "terminate/2, code_change/3, format_status/2])." n n
 
     "-define(SERVER, ?MODULE)." n n
 
@@ -594,18 +654,17 @@ Please see the function `tempo-define-template'.")
     (erlang-skel-separator-start 2)
     "%% @doc" n
     "%% Creates an event manager" n
-    "%%" n
-    "%% @spec start_link() -> {ok, Pid} | {error, Error}" n
     (erlang-skel-separator-end 2)
+    "-spec start_link() -> {ok, Pid :: pid()} |" n>
+    "{error, Error :: {already_started, pid()} | term()}." n
     "start_link() ->" n>
     "gen_event:start_link({local, ?SERVER})." n
     n
     (erlang-skel-separator-start 2)
     "%% @doc" n
     "%% Adds an event handler" n
-    "%%" n
-    "%% @spec add_handler() -> ok | {'EXIT', Reason} | term()" n
     (erlang-skel-separator-end 2)
+    "-spec add_handler() -> ok | {'EXIT', Reason :: term()} | term()." n
     "add_handler() ->" n>
     "gen_event:add_handler(?SERVER, ?MODULE, [])." n
     n
@@ -617,9 +676,11 @@ Please see the function `tempo-define-template'.")
     "%% @doc" n
     "%% Whenever a new event handler is added to an event manager," n
     "%% this function is called to initialize the event handler." n
-    "%%" n
-    "%% @spec init(Args) -> {ok, State}" n
     (erlang-skel-separator-end 2)
+    "-spec init(Args :: term() | {Args :: term(), Term :: term()}) ->" n>
+    "{ok, State :: term()} |" n>
+    "{ok, State :: term(), hibernate} |" n>
+    "{error, Reason :: term()}." n
     "init([]) ->" n>
     "{ok, #state{}}." n
     n
@@ -629,12 +690,13 @@ Please see the function `tempo-define-template'.")
     "%% Whenever an event manager receives an event sent using" n
     "%% gen_event:notify/2 or gen_event:sync_notify/2, this function is" n
     "%% called for each installed event handler to handle the event." n
-    "%%" n
-    "%% @spec handle_event(Event, State) ->" n
-    "%%                          {ok, State} |" n
-    "%%                          {swap_handler, Args1, State1, Mod2, Args2} |"n
-    "%%                          remove_handler" n
     (erlang-skel-separator-end 2)
+    "-spec handle_event(Event :: term(), State :: term()) ->" n>
+    "{ok, NewState :: term()} |" n>
+    "{ok, NewState :: term(), hibernate} |" n>
+    "remove_handler |" n>
+    "{swap_handler, Args1 :: term(), NewState :: term()," n>
+    "Handler2 :: atom() | {atom(), term()} , Args2 :: term()}." n>
     "handle_event(_Event, State) ->" n>
     "{ok, State}." n
     n
@@ -644,12 +706,13 @@ Please see the function `tempo-define-template'.")
     "%% Whenever an event manager receives a request sent using" n
     "%% gen_event:call/3,4, this function is called for the specified" n
     "%% event handler to handle the request." n
-    "%%" n
-    "%% @spec handle_call(Request, State) ->" n
-    "%%                   {ok, Reply, State} |" n
-    "%%                   {swap_handler, Reply, Args1, State1, Mod2, Args2} |" n
-    "%%                   {remove_handler, Reply}" n
     (erlang-skel-separator-end 2)
+    "-spec handle_call(Request :: term(), State :: term()) ->" n>
+    "{ok, Reply :: term(), NewState :: term()} |" n>
+    "{ok, Reply :: term(), NewState :: term(), hibernate} |" n>
+    "{remove_handler, Reply :: term()} |" n>
+    "{swap_handler, Reply :: term(), Args1 :: term(), NewState :: term()," n>
+    "Handler2 :: atom() | {atom(), term()}, Args2 :: term()}." n
     "handle_call(_Request, State) ->" n>
     "Reply = ok," n>
     "{ok, Reply, State}." n
@@ -660,12 +723,13 @@ Please see the function `tempo-define-template'.")
     "%% This function is called for each installed event handler when" n
     "%% an event manager receives any other message than an event or a" n
     "%% synchronous request (or a system message)." n
-    "%%" n
-    "%% @spec handle_info(Info, State) ->" n
-    "%%                         {ok, State} |" n
-    "%%                         {swap_handler, Args1, State1, Mod2, Args2} |" n
-    "%%                         remove_handler" n
     (erlang-skel-separator-end 2)
+    "-spec handle_info(Info :: term(), State :: term()) ->" n>
+    "{ok, NewState :: term()} |" n>
+    "{ok, NewState :: term(), hibernate} |" n>
+    "remove_handler |" n>
+    "{swap_handler, Args1 :: term(), NewState :: term()," n>
+    "Handler2 :: atom() | {atom(), term()}, Args2 :: term()}." n
     "handle_info(_Info, State) ->" n>
     "{ok, State}." n
     n
@@ -675,22 +739,40 @@ Please see the function `tempo-define-template'.")
     "%% Whenever an event handler is deleted from an event manager, this" n
     "%% function is called. It should be the opposite of Module:init/1 and" n
     "%% do any necessary cleaning up." n
-    "%%" n
-    "%% @spec terminate(Reason, State) -> void()" n
     (erlang-skel-separator-end 2)
-    "terminate(_Reason, _State) ->" n>
+    "-spec terminate(Arg :: {stop, Reason :: term()} |" n>
+    "stop |" n>
+    "remove_handler |" n>
+    "{error, {'EXIT', Reason :: term()}} |" n>
+    "{error, Term :: term()} |" n>
+    "term()," n>
+    "State :: term()) -> any()." n
+    "terminate(_Arg, _State) ->" n>
     "ok." n
     n
     (erlang-skel-separator-start 2)
     "%% @private" n
     "%% @doc" n
     "%% Convert process state when code is changed" n
-    "%%" n
-    "%% @spec code_change(OldVsn, State, Extra) -> {ok, NewState}" n
     (erlang-skel-separator-end 2)
+    "-spec code_change(OldVsn :: term() | {down, term()}," n>
+    "State :: term()," n>
+    "Extra :: term()) -> {ok, NewState :: term()}." n
     "code_change(_OldVsn, State, _Extra) ->" n>
     "{ok, State}." n
     n
+    (erlang-skel-separator-start 2)
+    "%% @private" n
+    "%% @doc" n
+    "%% This function is called for changing the form and appearance" n
+    "%% of gen_event status when it is returned from sys:get_status/1,2" n
+    "%% or when it appears in termination error logs." n
+    (erlang-skel-separator-end 2)
+    "-spec format_status(Opt :: normal | terminate," n>
+    "Status :: list()) -> Status :: term()." n
+    "format_status(_Opt, Status) ->" n>
+    "Status." n
+    n
     (erlang-skel-double-separator-start 3)
     "%%% Internal functions" n
     (erlang-skel-double-separator-end 3)
diff --git a/lib/tools/emacs/erlang.el b/lib/tools/emacs/erlang.el
index 429188b028..b88f368746 100644
--- a/lib/tools/emacs/erlang.el
+++ b/lib/tools/emacs/erlang.el
@@ -4,7 +4,7 @@
 ;; Author:   Anders Lindgren
 ;; Keywords: erlang, languages, processes
 ;; Date:     2011-12-11
-;; Version:  2.8.0
+;; Version:  2.8.1
 ;; Package-Requires: ((emacs "24.1"))
 
 ;; %CopyrightBegin%
@@ -84,7 +84,7 @@
   "The Erlang programming language."
   :group 'languages)
 
-(defconst erlang-version "2.8.0"
+(defconst erlang-version "2.8.1"
   "The version number of Erlang mode.")
 
 (defcustom erlang-root-dir nil
@@ -884,8 +884,6 @@ resulting regexp is surrounded by \\_< and \\_>."
       "alloc_sizes"
       "append"
       "append_element"
-      "await_proc_exit"
-      "await_sched_wall_time_modifications"
       "bump_reductions"
       "call_on_load_function"
       "cancel_timer"
@@ -895,8 +893,6 @@ resulting regexp is surrounded by \\_< and \\_>."
       "decode_packet"
       "delay_trap"
       "delete_element"
-      "dexit"
-      "dgroup_leader"
       "display"
       "display_nl"
       "display_string"
@@ -905,11 +901,7 @@ resulting regexp is surrounded by \\_< and \\_>."
       "dist_ctrl_get_data_notification"
       "dist_ctrl_input_handler"
       "dist_ctrl_put_data"
-      "dist_exit"
-      "dlink"
       "dmonitor_node"
-      "dmonitor_p"
-      "dsend"
       "dt_append_vm_tag_data"
       "dt_get_tag"
       "dt_get_tag_data"
@@ -917,8 +909,8 @@ resulting regexp is surrounded by \\_< and \\_>."
       "dt_put_tag"
       "dt_restore_tag"
       "dt_spread_tag"
-      "dunlink"
       "convert_time_unit"
+      "exit_signal"
       "external_size"
       "finish_after_on_load"
       "finish_loading"
@@ -929,7 +921,6 @@ resulting regexp is surrounded by \\_< and \\_>."
       "function_exported"
       "garbage_collect_message_area"
       "gather_gc_info_result"
-      "gather_sched_wall_time_result"
       "get_cookie"
       "get_module_info"
       "get_stacktrace"
@@ -2750,7 +2741,7 @@ Return nil if inside string, t if in a comment."
                   (1+ (nth 2 stack-top)))
                  ((= (char-syntax (following-char)) ?\))
                   (goto-char (nth 1 stack-top))
-                  (cond ((looking-at "[({]\\s *\\($\\|%\\)")
+                  (cond ((erlang-record-or-function-args-p)
                          ;; Line ends with parenthesis.
                          (let ((previous (erlang-indent-find-preceding-expr))
                                (stack-pos (nth 2 stack-top)))
@@ -2760,19 +2751,10 @@ Return nil if inside string, t if in a comment."
                          (nth 2 stack-top))))
                  ((= (following-char) ?,)
                   ;; a comma at the start of the line: line up with opening parenthesis.
-                  (nth 2 stack-top))
+                  (min (nth 2 stack-top)
+                       (erlang-indent-element stack-top indent-point token)))
                  (t
-                  (goto-char (nth 1 stack-top))
-                  (let ((base (cond ((looking-at "[({]\\s *\\($\\|%\\)")
-                                     ;; Line ends with parenthesis.
-                                     (erlang-indent-parenthesis (nth 2 stack-top)))
-                                    (t
-                                     ;; Indent to the same column as the first
-                                     ;; argument.
-                                     (goto-char (1+ (nth 1 stack-top)))
-                                     (skip-chars-forward " \t")
-                                     (current-column)))))
-                    (erlang-indent-standard indent-point token base 't)))))
+                  (erlang-indent-element stack-top indent-point token))))
           ;;
           ((eq (car stack-top) '<<)
            ;; Element of binary (possible comprehension) expression,
@@ -2781,13 +2763,11 @@ Return nil if inside string, t if in a comment."
                   (+ 2 (nth 2 stack-top)))
                  ((looking-at "\\(>>\\)[^_a-zA-Z0-9]")
                   (nth 2 stack-top))
+                 ((= (following-char) ?,)
+                  (min (+ (nth 2 stack-top) 1)
+                       (- (erlang-indent-to-first-element stack-top 2) 1)))
                  (t
-                  (goto-char (nth 1 stack-top))
-                  ;; Indent to the same column as the first
-                  ;; argument.
-                  (goto-char (+ 2 (nth 1 stack-top)))
-                  (skip-chars-forward " \t")
-                  (current-column))))
+                  (erlang-indent-to-first-element stack-top 2))))
 
           ((memq (car stack-top) '(icr fun spec))
            ;; The default indentation is the column of the option
@@ -2843,12 +2823,13 @@ Return nil if inside string, t if in a comment."
                (let ((base (erlang-indent-find-base stack indent-point off skip)))
                  ;; Special cases
                  (goto-char indent-point)
-                 (cond ((looking-at "\\(end\\|after\\)\\($\\|[^_a-zA-Z0-9]\\)")
+                 (cond ((looking-at "\\(;\\|end\\|after\\)\\($\\|[^_a-zA-Z0-9]\\)")
                         (if (eq (car stack-top) '->)
                             (erlang-pop stack))
-                        (if stack
-                            (erlang-caddr (car stack))
-                          0))
+                        (cond ((and stack (looking-at ";"))
+                               (+ (erlang-caddr (car stack)) (- erlang-indent-level 2)))
+                              (stack (erlang-caddr (car stack)))
+                              (t off)))
                        ((looking-at "catch\\b\\($\\|[^_a-zA-Z0-9]\\)")
                         ;; Are we in a try
                         (let ((start (if (eq (car stack-top) '->)
@@ -2922,6 +2903,22 @@ Return nil if inside string, t if in a comment."
                                 (current-column))) start-alternativ))))))
           )))
 
+(defun erlang-indent-to-first-element (stack-top extra)
+  ;; Indent to the same column as the first
+  ;; argument.  extra should be 1 for lists tuples or 2 for binaries
+  (goto-char (+ (nth 1 stack-top) extra))
+  (skip-chars-forward " \t")
+  (current-column))
+
+(defun erlang-indent-element (stack-top indent-point token)
+  (goto-char (nth 1 stack-top))
+  (let ((base (cond ((erlang-record-or-function-args-p)
+                     ;; Line ends with parenthesis.
+                     (erlang-indent-parenthesis (nth 2 stack-top)))
+                    (t
+                     (erlang-indent-to-first-element stack-top 1)))))
+    (erlang-indent-standard indent-point token base 't)))
+
 (defun erlang-indent-standard (indent-point token base inside-parenthesis)
   "Standard indent when in blocks or tuple or arguments.
    Look at last thing to see in what state we are, move relative to the base."
@@ -2947,6 +2944,9 @@ Return nil if inside string, t if in a comment."
                ;; Avoid treating comments a continued line.
                ((= (following-char) ?%)
                 base)
+               ((and (= (following-char) ?,) inside-parenthesis)
+                ;; a comma at the start of the line line up with parenthesis
+                (- base 1))
                ;; Continued line (e.g. line beginning
                ;; with an operator.)
                (t
@@ -3036,11 +3036,21 @@ This assumes that the preceding expression is either simple
                (t col)))
        col))))
 
+(defun erlang-record-or-function-args-p ()
+  (and (looking-at "[({]\\s *\\($\\|%\\)")
+       (or (eq (following-char) ?\( )
+           (save-excursion
+             (ignore-errors (forward-sexp (- 1)))
+             (eq (preceding-char) ?#)))))
+
 (defun erlang-indent-parenthesis (stack-position)
   (let ((previous (erlang-indent-find-preceding-expr)))
-    (if (> previous stack-position)
-        (+ stack-position erlang-argument-indent)
-      (+ previous erlang-argument-indent))))
+    (cond ((eq previous stack-position) ;; tuple or map not a record
+           (1+ stack-position))
+          ((> previous stack-position)
+           (+ stack-position erlang-argument-indent))
+          (t
+           (+ previous erlang-argument-indent)))))
 
 (defun erlang-skip-blank (&optional lim)
   "Skip over whitespace and comments until limit reached."
@@ -5174,7 +5184,6 @@ future, a new shell on an already running host will be started."
 ;; e.g. it does not assume that we are running an inferior
 ;; Erlang, there exists a lot of other possibilities.
 
-
 (defvar erlang-shell-buffer-name "*erlang*"
   "The name of the Erlang link shell buffer.")
 
@@ -5185,46 +5194,28 @@ Also see the description of `ielm-prompt-read-only'."
   :type 'boolean
   :package-version '(erlang . "2.8.0"))
 
-(defvar erlang-shell-mode-map nil
-  "Keymap used by Erlang shells.")
-
-
-(defvar erlang-shell-mode-hook nil
-  "User functions to run when an Erlang shell is started.
-
-This hook is used to change the behaviour of Erlang mode.  It is
-normally used by the user to personalise the programming environment.
-When used in a site init file, it could be used to customise Erlang
-mode for all users on the system.
-
-The function added to this hook is run every time a new Erlang
-shell is started.
+(defvar erlang-shell-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map "\M-\t"    'erlang-complete-tag)
 
-See also `erlang-load-hook', a hook which is run once, when Erlang
-mode is loaded, and `erlang-mode-hook' which is run every time a new
-Erlang source file is loaded into Emacs.")
+    ;; Normally the other way around.
+    (define-key map "\C-a"     'comint-bol)
+    (define-key map "\C-c\C-a" 'beginning-of-line)
 
+    (define-key map "\C-d"     nil)     ; Was `comint-delchar-or-maybe-eof'
+    (define-key map "\M-\C-m"  'compile-goto-error)
+    map)
+  "Keymap used by Erlang shells.")
 
 (defvar erlang-input-ring-file-name "~/.erlang_history"
   "When non-nil, file name used to store Erlang shell history information.")
 
-
-(defun erlang-shell-mode ()
+(define-derived-mode erlang-shell-mode comint-mode "Erlang Shell"
   "Major mode for interacting with an Erlang shell.
 
-We assume that we already are in Comint mode.
-
 The following special commands are available:
 \\{erlang-shell-mode-map}"
-  (interactive)
-  (setq major-mode 'erlang-shell-mode)
-  (setq mode-name "Erlang Shell")
   (erlang-mode-variables)
-  (if erlang-shell-mode-map
-      nil
-    (setq erlang-shell-mode-map (copy-keymap comint-mode-map))
-    (erlang-shell-mode-commands erlang-shell-mode-map))
-  (use-local-map erlang-shell-mode-map)
   ;; Needed when compiling directly from the Erlang shell.
   (setq compilation-last-buffer (current-buffer))
   (setq comint-prompt-regexp "^[^>=]*> *")
@@ -5238,7 +5229,6 @@ The following special commands are available:
             'inferior-erlang-strip-delete nil t)
   (add-hook 'comint-output-filter-functions
             'inferior-erlang-strip-ctrl-m nil t)
-
   (setq comint-input-ring-file-name erlang-input-ring-file-name)
   (comint-read-input-ring t)
   (make-local-variable 'kill-buffer-hook)
@@ -5257,8 +5247,7 @@ The following special commands are available:
                    (define-key map [menu-bar compilation]
                      (cons "Errors" compilation-menu-map)))
                map))))
-  (erlang-tags-init)
-  (run-hooks 'erlang-shell-mode-hook))
+  (erlang-tags-init))
 
 
 (defun erlang-mouse-2-command (event)
@@ -5280,13 +5269,6 @@ Selects Comint or Compilation mode command as appropriate."
       (call-interactively (lookup-key compilation-mode-map "\C-m"))
     (call-interactively (lookup-key comint-mode-map "\C-m"))))
 
-(defun erlang-shell-mode-commands (map)
-  (define-key map "\M-\t"    'erlang-complete-tag)
-  (define-key map "\C-a"     'comint-bol) ; Normally the other way around.
-  (define-key map "\C-c\C-a" 'beginning-of-line)
-  (define-key map "\C-d"     nil)       ; Was `comint-delchar-or-maybe-eof'
-  (define-key map "\M-\C-m"  'compile-goto-error))
-
 ;;;
 ;;; Inferior Erlang -- Run an Erlang shell as a subprocess.
 ;;;
diff --git a/lib/tools/emacs/test.erl.indented b/lib/tools/emacs/test.erl.indented
deleted file mode 100644
index 14a4eca7c3..0000000000
--- a/lib/tools/emacs/test.erl.indented
+++ /dev/null
@@ -1,784 +0,0 @@
-%% -*- Mode: erlang; indent-tabs-mode: nil -*-
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2009-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-
-%%%-------------------------------------------------------------------
-%%% File    : test.erl
-%%% Author  : Dan Gudmundsson <[email protected]>
-%%% Description :   Test emacs mode indention and font-locking
-%%%                 this file is intentionally not indented.
-%%%                 Copy the file and indent it and you should end up with test.erl.indented
-%%% Created :  6 Oct 2009 by Dan Gudmundsson <[email protected]>
-%%%-------------------------------------------------------------------
-
-%% Start off with syntax highlighting you have to verify this by looking here
-%% and see that the code looks alright
-
--module(test).
--compile(export_all).
-
-%% Used to cause an "Unbalanced parentheses" error.
-foo(M) ->
-    M#{a :=<<"a">>
-      ,b:=1}.
-foo() ->
-    #{a =><<"a">>
-     ,b=>1}.
-
-%% Module attributes should be highlighted
-
--export([t/1]).
--record(record1, {a,
-                  b,
-                  c
-                 }).
--record(record2, {
-          a,
-          b
-         }).
-
--record(record3, {a = 8#42423 bor
-                      8#4234,
-                  b = 8#5432
-                      bor 2#1010101
-                  c = 123 +
-                      234,
-		  d}).
-
--record(record4, {
-          a = 8#42423 bor
-              8#4234,
-          b = 8#5432
-              bor 2#1010101
-          c = 123 +
-              234,
-          d}).
-
--record(record5, { a = 1 :: integer()
-                 , b = foobar :: atom()
-                 }).
-
--define(MACRO_1, macro).
--define(MACRO_2(_), macro).
-
--spec t(integer()) -> any().
-
--type ann() :: Var :: integer().
--type ann2() :: Var ::
-            'return'
-          | 'return_white_spaces'
-          | 'return_comments'
-          | 'text' | ann().
--type paren() ::
-        (ann2()).
--type t1() :: atom().
--type t2() :: [t1()].
--type t3(Atom) :: integer(Atom).
--type t4() :: t3(foobar).
--type t5() :: {t1(), t3(foo)}.
--type t6() :: 1 | 2 | 3 |
-              'foo' | 'bar'.
--type t7() :: [].
--type t71() :: [_].
--type t8() :: {any(),none(),pid(),port(),
-	       reference(),float()}.
--type t9() :: [1|2|3|foo|bar] |
-              list(a | b | c) | t71().
--type t10() :: {1|2|3|foo|t9()} | {}.
--type t11() :: 1..2.
--type t13() :: maybe_improper_list(integer(), t11()).
--type t14() :: [erl_scan:foo() |
-                %% Should be highlighted
-                term() |
-                bool() |
-                byte() |
-                char() |
-                non_neg_integer() | nonempty_list() |
-                pos_integer() |
-                neg_integer() |
-                number() |
-                list() |
-                nonempty_improper_list() | nonempty_maybe_improper_list() |
-                maybe_improper_list() | string() | iolist() | byte() |
-                module() |
-                mfa() 	|
-                node() 	|
-                timeout() |
-                no_return() |
-                %% Should not be highlighted
-                nonempty_() | nonlist() |
-                erl_scan:bar(34, 92) | t13() | m:f(integer() | <<_:_*16>>)].
-
-
--type t15() :: {binary(),<<>>,<<_:34>>,<<_:_*42>>,
-		<<_:3,_:_*14>>,<<>>} | [<<>>|<<_:34>>|<<_:16>>|
-                                        <<_:3,_:_*1472>>|<<_:19,_:_*14>>| <<_:34>>|
-                                        <<_:34>>|<<_:34>>|<<_:34>>].
--type t16() :: fun().
--type t17() :: fun((...) -> paren()).
--type t18() :: fun(() -> t17() | t16()).
--type t19() :: fun((t18()) -> t16()) |
-               fun((nonempty_maybe_improper_list('integer', any())|
-                    1|2|3|a|b|<<_:3,_:_*14>>|integer()) ->
-                          nonempty_maybe_improper_list('integer', any())|
-                          1|2|3|a|b|<<_:3,_:_*14>>|integer()).
--type t20() :: [t19(), ...].
--type t21() :: tuple().
--type t21(A) :: A.
--type t22() :: t21(integer()).
--type t23() :: #rec1{}.
--type t24() :: #rec2{a :: t23(), b :: [atom()]}.
--type t25() :: #rec3{f123 :: [t24() |
-                              1|2|3|4|a|b|c|d|
-                              nonempty_maybe_improper_list(integer, any())]}.
--type t26() :: #rec4{ a :: integer()
-                    , b :: any()
-                    }.
--type t27() :: { integer()
-               , atom()
-               }.
--type t99() ::
-        {t2(),t4(),t5(),t6(),t7(),t8(),t10(),t14(),
-         t15(),t20(),t21(), t22(),t25()}.
--spec t1(FooBar :: t99()) -> t99();
-        (t2()) -> t2();
-	(t4()) -> t4() when is_subtype(t4(), t24);
-        (t23()) -> t23() when is_subtype(t23(), atom()),
-                              is_subtype(t23(), t14());
-        (t24()) -> t24() when is_subtype(t24(), atom()),
-                              is_subtype(t24(), t14()),
-                              is_subtype(t24(), t4()).
-
--spec over(I :: integer()) -> R1 :: foo:typen();
-          (A :: atom()) -> R2 :: foo:atomen();
-          (T :: tuple()) -> R3 :: bar:typen().
-
--spec mod:t2() -> any().
-
--spec handle_cast(Cast :: {'exchange', node(), [[name(),...]]}
-                        | {'del_member', name(), pid()},
-                  #state{}) -> {'noreply', #state{}}.
-
--spec handle_cast(Cast ::
-                    {'exchange', node(), [[name(),...]]}
-                  | {'del_member', name(), pid()},
-                  #state{}) -> {'noreply', #state{}}.
-
--spec all(fun((T) -> boolean()), List :: [T]) ->
-                 boolean() when is_subtype(T, term()). % (*)
-
--spec get_closest_pid(term()) ->
-                             Return :: pid()
-                                     | {'error', {'no_process', term()}
-                                        | {'no_such_group', term()}}.
-
--spec add( X :: integer()
-         , Y :: integer()
-         ) -> integer().
-
--opaque attributes_data() ::
-          [{'column', column()} | {'line', info_line()} |
-           {'text', string()}] |  {line(),column()}.
--record(r,{
-	  f1 :: attributes_data(),
-          f222 = foo:bar(34, #rec3{}, 234234234423,
-                         aassdsfsdfsdf, 2234242323) ::
-                   [t24() | 1|2|3|4|a|b|c|d|
-                    nonempty_maybe_improper_list(integer, any())],
-          f333 :: [t24() | 1|2|3|4|a|b|c|d|
-                   nonempty_maybe_improper_list(integer, any())],
-          f3 = x:y(),
-          f4 = x:z() :: t99(),
-          f17 :: 'undefined',
-          f18 :: 1 | 2 | 'undefined',
-          f19 = 3 :: integer()|undefined,
-          f5 = 3 :: undefined|integer()}).
-
--record(state, {
-          sequence_number = 1          :: integer()
-         }).
-
-
-highlighting(X)			  % Function definitions should be highlighted
-  when is_integer(X) ->	  % and so should `when' and `is_integer' be
-    %% Highlighting
-    %% Various characters (we keep an `atom' after to see that highlighting ends)
-    $a,atom,			  % Characters should be marked
-    "string",atom,		  % and strings
-    'asdasd',atom,		  % quote should be atoms??
-    'VaV',atom,
-    'aVa',atom,
-    '\'atom',atom,
-    'atom\'',atom,
-    'at\'om',atom,
-    '#1',atom,
-
-    $", atom,					% atom should be ok
-    $', atom,
-
-    "string$", atom,  "string$", atom,  		% currently buggy I know...
-    "string\$", atom,   				% workaround for bug above
-
-    "char $in string", atom,
-
-    'atom$', atom,  'atom$', atom,
-    'atom\$', atom,
-
-    'char $in atom', atom,
-
-    $[, ${, $\\, atom,
-    ?MACRO_1,
-    ?MACRO_2(foo),
-
-    %% Numerical constants
-    16#DD,					% AD Should not be highlighted
-    32#dd,					% AD Should not be highlighted
-    32#ddAB,				        % AD Should not be highlighted
-    32#101,				        % AD Should not be highlighted
-    32#ABTR,				        % AD Should not be highlighted
-
-    %% Variables
-    Variables = lists:foo(),
-    _Variables = lists:foo(),                      % AD
-    AppSpec = Xyz/2,
-    Module42 = Xyz(foo, bar),
-    Module:foo(),
-    _Module:foo(),				% AD
-    FooÅÅ = lists:reverse([tl,hd,tl,hd]),	% AD Should highlight FooÅÅ
-    _FooÅÅ = 42,				% AD Should highlight _FooÅÅ
-
-    %% Bifs
-    erlang:registered(),
-    registered(),
-    hd(tl(tl(hd([a,b,c])))),
-    erlang:anything(lists),
-    %% Guards
-    is_atom(foo), is_float(2.3), is_integer(32), is_number(4323.3),
-    is_function(Fun), is_pid(self()),
-    not_a_guard:is_list([]),
-    %% Other Types
-
-    atom,			  % not (currently) hightlighted
-    234234,
-    234.43,
-
-    [list, are, not, higlighted],
-    {nor, is, tuple},
-    ok.
-
-%%%
-%%%  Indentation
-%%%
-
-%%%  Left
-
-%%   Indented
-
-                                                %    Right
-
-
-indent_basics(X, Y, Z)
-  when X > 42,
-       Z < 13;
-       Y =:= 4711 ->
-    %% comments
-                                                % right comments
-    case lists:filter(fun(_, AlongName,
-                          B,
-                          C) ->
-                              true
-                      end,
-                      [a,v,b])
-    of
-        [] ->
-            Y = 5 * 43,
-            ok;
-        [_|_] ->
-            Y = 5 * 43,
-            ok
-    end,
-    Y,
-    %% List, tuples and binaries
-    [a,
-     b, c
-    ],
-    [ a,
-      b, c
-    ],
-
-    [
-     a,
-     b
-    ],
-    {a,
-     b,c
-    },
-    { a,
-      b,c
-    },
-
-    {
-      a,
-      b
-    },
-
-    <<1:8,
-      2:8
-    >>,
-    <<
-      1:8,
-      2:8
-    >>,
-    << 1:8,
-       2:8
-    >>,
-
-    (a,
-     b,
-     c
-    ),
-
-    ( a,
-      b,
-      c
-    ),
-
-
-    (
-      a,
-      b,
-      c
-    ),
-
-    call(2#42423 bor
-             #4234,
-         2#5432,
-         other_arg),
-    ok;
-indent_basics(Xlongname,
-              #struct{a=Foo,
-                      b=Bar},
-              [X|
-               Y]) ->
-    testing_next_clause,
-    ok;
-indent_basics(					% AD added clause
-  X, 						% not sure how this should look
-  Y,
-  Z)
-  when
-      X < 42, Z > 13;
-      Y =:= 4711 ->
-    foo;
-indent_basics(X, Y, Z) when			% AD added clause
-      X < 42, Z > 13;				% testing when indentation
-      Y =:= 4711 ->
-    foo;
-indent_basics(X, Y, Z)				% AD added clause
-  when						% testing when indentation
-      X < 42, Z > 13;				% unsure about this one
-      Y =:= 4711 ->
-    foo.
-
-
-
-indent_nested() ->
-    [
-     {foo, 2, "string"},
-     {bar, 3, "another string"}
-    ].
-
-
-indent_icr(Z) -> 				% icr = if case receive
-    %% If
-    if Z >= 0 ->
-            X = 43 div 4,
-            foo(X);
-       Z =< 10 ->
-            X = 43 div 4,
-            foo(X);
-       Z == 5 orelse
-       Z == 7 ->
-            X = 43 div 4,
-            foo(X);
-       true ->
-            if_works
-    end,
-    %% Case
-    case {Z, foo, bar} of
-        {Z,_,_} ->
-            X = 43 div 4,
-            foo(X);
-        {Z,_,_}	when
-              Z =:= 42 ->				% AD line should be indented as a when
-            X = 43 div 4,
-            foo(X);
-        {Z,_,_}
-          when Z < 10 ->			% AD when should be indented
-            X = 43 div 4,
-            foo(X);
-        {Z,_,_}
-          when					% AD when should be indented
-              Z < 10				% and the guards should follow when
-              andalso				% unsure about how though
-              true ->
-            X = 43 div 4,
-            foo(X)
-    end,
-    %% begin
-    begin
-        sune,
-        X = 74234 + foo(8456) +
-            345 div 43,
-        ok
-    end,
-
-
-    %% receive
-    receive
-        {Z,_,_} ->
-            X = 43 div 4,
-            foo(X);
-        Z ->
-            X = 43 div 4,
-            foo(X)
-    end,
-    receive
-        {Z,_,_} ->
-            X = 43 div 4,
-            foo(X);
-        Z 					% AD added clause
-          when Z =:= 1 ->			% This line should be indented by 2
-            X = 43 div 4,
-            foo(X);
-        Z when					% AD added clause
-              Z =:= 2 ->				% This line should be indented by 2
-            X = 43 div 4,
-            foo(X);
-        Z ->
-            X = 43 div 4,
-            foo(X)
-    after infinity ->
-            foo(X),
-            asd(X),
-            5*43
-    end,
-    receive
-    after 10 ->
-            foo(X),
-            asd(X),
-            5*43
-    end,
-    ok.
-
-indent_fun() ->
-    %% Changed fun to one indention level
-    Var = spawn(fun(X)
-                      when X == 2;
-                           X > 10 ->
-                        hello,
-                        case Hello() of
-                            true when is_atom(X) ->
-                                foo;
-                            false ->
-                                bar
-                        end;
-                   (Foo) when is_atom(Foo),
-                              is_integer(X) ->
-                        X = 6* 45,
-                        Y = true andalso
-                            kalle
-                end),
-    %% check EEP37 named funs
-    Fn1 = fun Fact(N) when N > 0 ->
-                  F = Fact(N-1),
-                  N * F;
-              Fact(0) ->
-                  1
-          end,
-    %% check anonymous funs too
-    Fn2 = fun(0) ->
-                  1;
-             (N) ->
-                  N
-          end,
-    ok.
-
-indent_try_catch() ->
-    try
-        io:format(stdout, "Parsing file ~s, ",
-                  [St0#leex.xfile]),
-        {ok,Line3,REAs,Actions,St3} =
-            parse_rules(Xfile, Line2, Macs, St2)
-    catch
-        exit:{badarg,R} ->
-            foo(R),
-            io:format(stdout,
-                      "ERROR reason ~p~n",
-                      R);
-        error:R 				% AD added clause
-          when R =:= 42 ->			% when should be indented
-            foo(R);
-        error:R 				% AD added clause
-          when					% when should be indented
-              R =:= 42 ->				% but unsure about this (maybe 2 more)
-            foo(R);
-        error:R when				% AD added clause
-              R =:= foo ->				% line should be 2 indented (works)
-            foo(R);
-        error:R ->
-            foo(R),
-            io:format(stdout,
-                      "ERROR reason ~p~n",
-                      R)
-    after
-        foo('after'),
-        file:close(Xfile)
-    end;
-indent_try_catch() ->
-    try
-        foo(bar)
-    of
-        X when true andalso
-               kalle ->
-            io:format(stdout, "Parsing file ~s, ",
-                      [St0#leex.xfile]),
-            {ok,Line3,REAs,Actions,St3} =
-                parse_rules(Xfile, Line2, Macs, St2);
-        X 					% AD added clause
-          when false andalso			% when should be 2 indented
-               bengt ->
-            gurka();
-        X when					% AD added clause
-              false andalso				% line should be 2 indented
-              not bengt ->
-            gurka();
-        X ->
-            io:format(stdout, "Parsing file ~s, ",
-                      [St0#leex.xfile]),
-            {ok,Line3,REAs,Actions,St3} =
-                parse_rules(Xfile, Line2, Macs, St2)
-    catch
-        exit:{badarg,R} ->
-            foo(R),
-            io:format(stdout,
-                      "ERROR reason ~p~n",
-                      R);
-        error:R ->
-            foo(R),
-            io:format(stdout,
-                      "ERROR reason ~p~n",
-                      R)
-    after
-        foo('after'),
-        file:close(Xfile),
-        bar(with_long_arg,
-            with_second_arg)
-    end;
-indent_try_catch() ->
-    try foo()
-    after
-        foo(),
-        bar(with_long_arg,
-            with_second_arg)
-    end.
-
-indent_catch() ->
-    D = B +
-        float(43.1),
-
-    B = catch oskar(X),
-
-    A = catch (baz +
-                   bax),
-    catch foo(),
-
-    C = catch B +
-        float(43.1),
-
-    case catch foo(X) of
-        A ->
-            B
-    end,
-
-    case
-        catch foo(X)
-    of
-        A ->
-            B
-    end,
-
-    case
-        foo(X)
-    of
-        A ->
-            catch B,
-            X
-    end,
-
-    try sune of
-        _ -> foo
-    catch _:_ -> baf
-    end,
-
-    try
-        sune
-    of
-        _ ->
-            X = 5,
-            (catch foo(X)),
-            X + 10
-    catch _:_ -> baf
-    end,
-
-    try
-        (catch sune)
-    of
-        _ ->
-    catch foo()  %% BUGBUG can't handle catch inside try without parentheses
-    catch _:_ ->
-            baf
-    end,
-
-    try
-        (catch exit())
-    catch
-        _ ->
-            catch baf()
-    end,
-    ok.
-
-indent_binary() ->
-    X = lists:foldr(fun(M) ->
-                            <<Ma/binary, " ">>
-                    end, [], A),
-    A = <<X/binary, 0:8>>,
-    B.
-
-
-indent_comprehensions() ->
-    %% I don't have a good idea how we want to handle this
-    %% but they are here to show how they are indented today.
-    Result1 = [X ||
-                  #record{a=X} <- lists:seq(1, 10),
-                  true = (X rem 2)
-              ],
-    Result2 = [X || <<X:32,_:32>> <= <<0:512>>,
-                    true = (X rem 2)
-              ],
-
-    Binary1 = << <<X:8>> ||
-                  #record{a=X} <- lists:seq(1, 10),
-                  true = (X rem 2)
-              >>,
-
-    Binary2 = << <<X:8>> || <<X:32,_:32>> <= <<0:512>>,
-                            true = (X rem 2)
-              >>,
-    ok.
-
-%% This causes an error in earlier erlang-mode versions.
-foo() ->
-    [#foo{
-        foo = foo}].
-
-%% Record indentation
-some_function_with_a_very_long_name() ->
-    #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
-       field1=a,
-       field2=b},
-    case dummy_function_with_a_very_very_long_name(x) of
-        #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
-           field1=a,
-           field2=b} ->
-            ok;
-        Var = #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
-                 field1=a,
-                 field2=b} ->
-            Var#'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
-              field1=a,
-              field2=b};
-        #xyz{
-           a=1,
-           b=2} ->
-            ok
-    end.
-
-another_function_with_a_very_very_long_name() ->
-    #rec{
-       field1=1,
-       field2=1}.
-
-some_function_name_xyz(xyzzy, #some_record{
-                                 field1=Field1,
-                                 field2=Field2}) ->
-    SomeVariable = f(#'Some-long-record-name'{
-                        field_a = 1,
-                        'inter-xyz-parameters' =
-                            #'Some-other-very-long-record-name'{
-                               field2 = Field1,
-                               field2 = Field2}}),
-    {ok, SomeVariable}.
-
-commas_first() ->
-    {abc, [ {some_var, 1}
-          , {some_other_var, 2}
-          , {erlang_ftw, 9}
-          , {erlang_cookie, 'cookie'}
-          , {cmds,
-             [ {one,   "sudo ls"}
-             , {one,   "sudo ls"}
-             , {two,   "sudo ls"}
-             , {three, "sudo ls"}
-             , {four,  "sudo ls"}
-             , {three, "sudo ls"}
-             ] }
-          , {ssh_username, "yow"}
-          , {cluster,
-             [ {aaaa, [ {"10.198.55.12" , "" }
-                      , {"10.198.55.13" , "" }
-                      ] }
-             , {bbbb, [ {"10.198.55.151", "" }
-                      , {"10.198.55.123", "" }
-                      , {"10.198.55.34" , "" }
-                      , {"10.198.55.85" , "" }
-                      , {"10.198.55.67" , "" }
-                      ] }
-             , {cccc, [ {"10.198.55.68" , "" }
-                      , {"10.198.55.69" , "" }
-                      ] }
-             ] }
-          ]
-    }.
-
-
-%% this used to result in a scan-sexp error
-[{
- }].
-
-%% this used to result in 2x the correct indentation within the function
-%% body, due to the function name being mistaken for a keyword
-catcher(N) ->
-    try generate_exception(N) of
-        Val -> {N, normal, Val}
-    catch
-        throw:X -> {N, caught, thrown, X};
-        exit:X -> {N, caught, exited, X};
-        error:X -> {N, caught, error, X}
-    end.
diff --git a/lib/tools/emacs/test.erl.orig b/lib/tools/emacs/test.erl.orig
deleted file mode 100644
index c0cf1749b6..0000000000
--- a/lib/tools/emacs/test.erl.orig
+++ /dev/null
@@ -1,784 +0,0 @@
-%% -*- Mode: erlang; indent-tabs-mode: nil -*-
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2009-2016. All Rights Reserved.
-%%
-%% Licensed under the Apache License, Version 2.0 (the "License");
-%% you may not use this file except in compliance with the License.
-%% You may obtain a copy of the License at
-%%
-%%     http://www.apache.org/licenses/LICENSE-2.0
-%%
-%% Unless required by applicable law or agreed to in writing, software
-%% distributed under the License is distributed on an "AS IS" BASIS,
-%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-%% See the License for the specific language governing permissions and
-%% limitations under the License.
-%%
-%% %CopyrightEnd%
-
-%%%-------------------------------------------------------------------
-%%% File    : test.erl
-%%% Author  : Dan Gudmundsson <[email protected]>
-%%% Description :   Test emacs mode indention and font-locking
-%%%                 this file is intentionally not indented.
-%%%                 Copy the file and indent it and you should end up with test.erl.indented
-%%% Created :  6 Oct 2009 by Dan Gudmundsson <[email protected]>
-%%%-------------------------------------------------------------------
-
-%% Start off with syntax highlighting you have to verify this by looking here
-%% and see that the code looks alright
-
--module(test).
--compile(export_all).
-
-%% Used to cause an "Unbalanced parentheses" error.
-foo(M) ->
-M#{a :=<<"a">>
-,b:=1}.
-foo() ->
-#{a =><<"a">>
-,b=>1}.
-
-%% Module attributes should be highlighted
-
--export([t/1]).
--record(record1, {a,
- b,
- c
-}).
--record(record2, {
-  a,
-  b
- }).
-
--record(record3, {a = 8#42423 bor
-    8#4234,
-  b = 8#5432
-		  bor 2#1010101
-  c = 123 +
-234,
-		  d}).
-
--record(record4, {
- a = 8#42423 bor
-   8#4234,
- b = 8#5432
-    bor 2#1010101
- c = 123 +
-     234,
- d}).
-
--record(record5, { a = 1 :: integer()
-, b = foobar :: atom()
-}).
-
--define(MACRO_1, macro).
--define(MACRO_2(_), macro).
-
--spec t(integer()) -> any().
-
--type ann() :: Var :: integer().
--type ann2() :: Var ::
-   'return'
- | 'return_white_spaces'
-  | 'return_comments'
-  | 'text' | ann().
--type paren() ::
-  (ann2()).
--type t1() :: atom().
--type t2() :: [t1()].
--type t3(Atom) :: integer(Atom).
--type t4() :: t3(foobar).
--type t5() :: {t1(), t3(foo)}.
--type t6() :: 1 | 2 | 3 |
-	'foo' | 'bar'.
--type t7() :: [].
--type t71() :: [_].
--type t8() :: {any(),none(),pid(),port(),
-	       reference(),float()}.
--type t9() :: [1|2|3|foo|bar] |
-    list(a | b | c) | t71().
--type t10() :: {1|2|3|foo|t9()} | {}.
--type t11() :: 1..2.
--type t13() :: maybe_improper_list(integer(), t11()).
--type t14() :: [erl_scan:foo() |
-        %% Should be highlighted
-	term() |
-	bool() |
-	byte() |
-	char() |
-	non_neg_integer() | nonempty_list() |
-	pos_integer() |
-	neg_integer() |
-	number() |
-	list() |
-	nonempty_improper_list() | nonempty_maybe_improper_list() |
-	maybe_improper_list() | string() | iolist() | byte() |
-	module() |
-	mfa() 	|
-	node() 	|
-	timeout() |
-	no_return() |
-	%% Should not be highlighted
-	nonempty_() | nonlist() |
- erl_scan:bar(34, 92) | t13() | m:f(integer() | <<_:_*16>>)].
-
-
--type t15() :: {binary(),<<>>,<<_:34>>,<<_:_*42>>,
-		<<_:3,_:_*14>>,<<>>} | [<<>>|<<_:34>>|<<_:16>>|
-<<_:3,_:_*1472>>|<<_:19,_:_*14>>| <<_:34>>|
-<<_:34>>|<<_:34>>|<<_:34>>].
--type t16() :: fun().
--type t17() :: fun((...) -> paren()).
--type t18() :: fun(() -> t17() | t16()).
--type t19() :: fun((t18()) -> t16()) |
-  fun((nonempty_maybe_improper_list('integer', any())|
-      1|2|3|a|b|<<_:3,_:_*14>>|integer()) ->
-nonempty_maybe_improper_list('integer', any())|
-1|2|3|a|b|<<_:3,_:_*14>>|integer()).
--type t20() :: [t19(), ...].
--type t21() :: tuple().
--type t21(A) :: A.
--type t22() :: t21(integer()).
--type t23() :: #rec1{}.
--type t24() :: #rec2{a :: t23(), b :: [atom()]}.
--type t25() :: #rec3{f123 :: [t24() |
-1|2|3|4|a|b|c|d|
-nonempty_maybe_improper_list(integer, any())]}.
--type t26() :: #rec4{ a :: integer()
-, b :: any()
-}.
--type t27() :: { integer()
-, atom()
-}.
--type t99() ::
-{t2(),t4(),t5(),t6(),t7(),t8(),t10(),t14(),
-t15(),t20(),t21(), t22(),t25()}.
--spec t1(FooBar :: t99()) -> t99();
-(t2()) -> t2();
-	(t4()) -> t4() when is_subtype(t4(), t24);
-(t23()) -> t23() when is_subtype(t23(), atom()),
-                      is_subtype(t23(), t14());
-(t24()) -> t24() when is_subtype(t24(), atom()),
-                      is_subtype(t24(), t14()),
-	   is_subtype(t24(), t4()).
-
--spec over(I :: integer()) -> R1 :: foo:typen();
-  (A :: atom()) -> R2 :: foo:atomen();
- (T :: tuple()) -> R3 :: bar:typen().
-
--spec mod:t2() -> any().
-
--spec handle_cast(Cast :: {'exchange', node(), [[name(),...]]}
-  | {'del_member', name(), pid()},
-     #state{}) -> {'noreply', #state{}}.
-
--spec handle_cast(Cast ::
-   {'exchange', node(), [[name(),...]]}
- | {'del_member', name(), pid()},
-   #state{}) -> {'noreply', #state{}}.
-
--spec all(fun((T) -> boolean()), List :: [T]) ->
- boolean() when is_subtype(T, term()). % (*)
-
--spec get_closest_pid(term()) ->
-       Return :: pid()
- | {'error', {'no_process', term()}
-   | {'no_such_group', term()}}.
-
--spec add( X :: integer()
-, Y :: integer()
-) -> integer().
-
--opaque attributes_data() ::
-[{'column', column()} | {'line', info_line()} |
- {'text', string()}] |  {line(),column()}.
--record(r,{
-	  f1 :: attributes_data(),
-f222 = foo:bar(34, #rec3{}, 234234234423,
-               aassdsfsdfsdf, 2234242323) ::
-[t24() | 1|2|3|4|a|b|c|d|
- nonempty_maybe_improper_list(integer, any())],
-f333 :: [t24() | 1|2|3|4|a|b|c|d|
-	 nonempty_maybe_improper_list(integer, any())],
-f3 = x:y(),
-f4 = x:z() :: t99(),
-f17 :: 'undefined',
-f18 :: 1 | 2 | 'undefined',
-f19 = 3 :: integer()|undefined,
-f5 = 3 :: undefined|integer()}).
-
--record(state, {
-  sequence_number = 1          :: integer()
-  }).
-
-
-highlighting(X)			  % Function definitions should be highlighted
-  when is_integer(X) ->	  % and so should `when' and `is_integer' be
- %% Highlighting
- %% Various characters (we keep an `atom' after to see that highlighting ends)
- $a,atom,			  % Characters should be marked
- "string",atom,		  % and strings
- 'asdasd',atom,		  % quote should be atoms??
- 'VaV',atom,
- 'aVa',atom,
- '\'atom',atom,
- 'atom\'',atom,
- 'at\'om',atom,
- '#1',atom,
-
- $", atom,					% atom should be ok
- $', atom,
-
- "string$", atom,  "string$", atom,  		% currently buggy I know...
- "string\$", atom,   				% workaround for bug above
-
- "char $in string", atom,
-
- 'atom$', atom,  'atom$', atom,
- 'atom\$', atom,
-
- 'char $in atom', atom,
-
- $[, ${, $\\, atom,
- ?MACRO_1,
- ?MACRO_2(foo),
-
- %% Numerical constants
- 16#DD,					% AD Should not be highlighted
- 32#dd,					% AD Should not be highlighted
- 32#ddAB,				        % AD Should not be highlighted
- 32#101,				        % AD Should not be highlighted
- 32#ABTR,				        % AD Should not be highlighted
-
- %% Variables
- Variables = lists:foo(),
- _Variables = lists:foo(),                      % AD
- AppSpec = Xyz/2,
- Module42 = Xyz(foo, bar),
- Module:foo(),
- _Module:foo(),				% AD
- FooÅÅ = lists:reverse([tl,hd,tl,hd]),	% AD Should highlight FooÅÅ
- _FooÅÅ = 42,				% AD Should highlight _FooÅÅ
-
- %% Bifs
- erlang:registered(),
- registered(),
- hd(tl(tl(hd([a,b,c])))),
- erlang:anything(lists),
- %% Guards
- is_atom(foo), is_float(2.3), is_integer(32), is_number(4323.3),
- is_function(Fun), is_pid(self()),
- not_a_guard:is_list([]),
- %% Other Types
-
- atom,			  % not (currently) hightlighted
- 234234,
- 234.43,
-
- [list, are, not, higlighted],
- {nor, is, tuple},
- ok.
-
-%%%
-%%%  Indentation
-%%%
-
-%%%  Left
-
-%%   Indented
-
-%    Right
-
-
-indent_basics(X, Y, Z)
-  when X > 42,
-Z < 13;
-Y =:= 4711 ->
- %% comments
- % right comments
- case lists:filter(fun(_, AlongName,
-	      B,
-    C) ->
-		       true
-		   end,
-		   [a,v,b])
- of
- [] ->
- Y = 5 * 43,
- ok;
- [_|_] ->
- Y = 5 * 43,
- ok
- end,
- Y,
- %% List, tuples and binaries
- [a,
-  b, c
- ],
- [ a,
-   b, c
-  ],
-
- [
- a,
- b
-],
- {a,
-  b,c
- },
- { a,
-  b,c
-    },
-
- {
- a,
- b
- },
-
-<<1:8,
-  2:8
-  >>,
- <<
- 1:8,
- 2:8
-  >>,
- << 1:8,
-   2:8
-    >>,
-
- (a,
-  b,
-  c
- ),
-
-    ( a,
-     b,
-     c
-    ),
-
-
- (
-  a,
-  b,
-  c
- ),
-
- call(2#42423 bor
-   #4234,
-  2#5432,
- other_arg),
- ok;
-indent_basics(Xlongname,
-     #struct{a=Foo,
-     b=Bar},
-       [X|
-	Y]) ->
- testing_next_clause,
- ok;
-indent_basics(					% AD added clause
- X, 						% not sure how this should look
- Y,
- Z)
- when
- X < 42, Z > 13;
- Y =:= 4711 ->
- foo;
-indent_basics(X, Y, Z) when			% AD added clause
- X < 42, Z > 13;				% testing when indentation
- Y =:= 4711 ->
- foo;
-indent_basics(X, Y, Z)				% AD added clause
- when						% testing when indentation
- X < 42, Z > 13;				% unsure about this one
- Y =:= 4711 ->
- foo.
-
-
-
-indent_nested() ->
- [
- {foo, 2, "string"},
- {bar, 3, "another string"}
-  ].
-
-
-indent_icr(Z) -> 				% icr = if case receive
- %% If
- if Z >= 0 ->
-	 X = 43 div 4,
-	 foo(X);
-    Z =< 10 ->
-	 X = 43 div 4,
-	 foo(X);
-    Z == 5 orelse
-    Z == 7 ->
-	 X = 43 div 4,
-	 foo(X);
-    true ->
-	 if_works
-  end,
- %% Case
- case {Z, foo, bar} of
-  {Z,_,_} ->
-  X = 43 div 4,
-  foo(X);
-  {Z,_,_}	when
-  Z =:= 42 ->				% AD line should be indented as a when
-  X = 43 div 4,
-  foo(X);
-  {Z,_,_}
-  when Z < 10 ->			% AD when should be indented
-  X = 43 div 4,
-  foo(X);
-  {Z,_,_}
-  when					% AD when should be indented
-  Z < 10				% and the guards should follow when
-  andalso				% unsure about how though
-  true ->
-  X = 43 div 4,
-  foo(X)
- end,
- %% begin
- begin
- sune,
- X = 74234 + foo(8456) +
-  345 div 43,
- ok
- end,
-
-
- %% receive
-  receive
-  {Z,_,_} ->
-    X = 43 div 4,
-    foo(X);
-  Z ->
-   X = 43 div 4,
-   foo(X)
-  end,
-  receive
-  {Z,_,_} ->
-  X = 43 div 4,
-  foo(X);
- Z 					% AD added clause
-  when Z =:= 1 ->			% This line should be indented by 2
-  X = 43 div 4,
-  foo(X);
- Z when					% AD added clause
-  Z =:= 2 ->				% This line should be indented by 2
-  X = 43 div 4,
-  foo(X);
- Z ->
-    X = 43 div 4,
-    foo(X)
- after infinity ->
-    foo(X),
-    asd(X),
-    5*43
- end,
- receive
- after 10 ->
- foo(X),
- asd(X),
- 5*43
- end,
- ok.
-
-indent_fun() ->
-    %% Changed fun to one indention level
-Var = spawn(fun(X)
-       when X == 2;
-	     X > 10 ->
-  hello,
-  case Hello() of
-   true when is_atom(X) ->
-      foo;
-  false ->
-      bar
-  end;
- (Foo) when is_atom(Foo),
-   is_integer(X) ->
-  X = 6* 45,
-  Y = true andalso
-	  kalle
- end),
-%% check EEP37 named funs
-Fn1 = fun Fact(N) when N > 0 ->
-   F = Fact(N-1),
-          N * F;
-Fact(0) ->
-                 1
-  end,
-%% check anonymous funs too
-   Fn2 = fun(0) ->
-1;
-   (N) ->
-   N
- end,
-  ok.
-
-indent_try_catch() ->
- try
- io:format(stdout, "Parsing file ~s, ",
- [St0#leex.xfile]),
- {ok,Line3,REAs,Actions,St3} =
- parse_rules(Xfile, Line2, Macs, St2)
- catch
-  exit:{badarg,R} ->
-  foo(R),
-  io:format(stdout,
-   "ERROR reason ~p~n",
-    R);
-  error:R 				% AD added clause
-  when R =:= 42 ->			% when should be indented
-  foo(R);
-  error:R 				% AD added clause
-  when					% when should be indented
-  R =:= 42 ->				% but unsure about this (maybe 2 more)
-  foo(R);
-  error:R when				% AD added clause
-  R =:= foo ->				% line should be 2 indented (works)
-  foo(R);
-  error:R ->
-  foo(R),
-  io:format(stdout,
-   "ERROR reason ~p~n",
-    R)
- after
-  foo('after'),
-  file:close(Xfile)
- end;
-indent_try_catch() ->
- try
-   foo(bar)
- of
- X when true andalso
- kalle ->
-  io:format(stdout, "Parsing file ~s, ",
-  [St0#leex.xfile]),
-  {ok,Line3,REAs,Actions,St3} =
-  parse_rules(Xfile, Line2, Macs, St2);
- X 					% AD added clause
-  when false andalso			% when should be 2 indented
-  bengt ->
-  gurka();
- X when					% AD added clause
-  false andalso				% line should be 2 indented
-  not bengt ->
-  gurka();
- X ->
-  io:format(stdout, "Parsing file ~s, ",
-  [St0#leex.xfile]),
-  {ok,Line3,REAs,Actions,St3} =
-  parse_rules(Xfile, Line2, Macs, St2)
- catch
- exit:{badarg,R} ->
-    foo(R),
-    io:format(stdout,
-	      "ERROR reason ~p~n",
-	      R);
- error:R ->
-    foo(R),
-    io:format(stdout,
-	      "ERROR reason ~p~n",
-	      R)
- after
- foo('after'),
-  file:close(Xfile),
-  bar(with_long_arg,
-       with_second_arg)
- end;
- indent_try_catch() ->
- try foo()
- after
-  foo(),
-  bar(with_long_arg,
-      with_second_arg)
- end.
-
-indent_catch() ->
-  D = B +
-  float(43.1),
-
-  B = catch oskar(X),
-
-  A = catch (baz +
-      bax),
- catch foo(),
-
-  C = catch B +
-     float(43.1),
-
-  case catch foo(X) of
-  A ->
- B
- end,
-
- case
-  catch foo(X)
- of
- A ->
-   B
-  end,
-
-  case
-  foo(X)
-   of
- A ->
-	  catch B,
-	  X
-   end,
-
- try sune of
- _ -> foo
-   catch _:_ -> baf
-   end,
-
-    try
-sune
-   of
- _ ->
-   X = 5,
-   (catch foo(X)),
-   X + 10
-   catch _:_ -> baf
-   end,
-
-   try
- (catch sune)
-   of
- _ ->
-   catch foo()  %% BUGBUG can't handle catch inside try without parentheses
-   catch _:_ ->
-    baf
-   end,
-
-   try
-(catch exit())
-   catch
-_ ->
-    catch baf()
-   end,
- ok.
-
-indent_binary() ->
-  X = lists:foldr(fun(M) ->
-    <<Ma/binary, " ">>
-    end, [], A),
-  A = <<X/binary, 0:8>>,
-  B.
-
-
-indent_comprehensions() ->
-%% I don't have a good idea how we want to handle this
-%% but they are here to show how they are indented today.
-Result1 = [X ||
-  #record{a=X} <- lists:seq(1, 10),
-  true = (X rem 2)
-     ],
-Result2 = [X || <<X:32,_:32>> <= <<0:512>>,
-    true = (X rem 2)
-       ],
-
-Binary1 = << <<X:8>> ||
-  #record{a=X} <- lists:seq(1, 10),
-  true = (X rem 2)
-      >>,
-
-Binary2 = << <<X:8>> || <<X:32,_:32>> <= <<0:512>>,
-  true = (X rem 2)
-      >>,
-ok.
-
-%% This causes an error in earlier erlang-mode versions.
-foo() ->
-[#foo{
-foo = foo}].
-
-%% Record indentation
-some_function_with_a_very_long_name() ->
- #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
- field1=a,
- field2=b},
- case dummy_function_with_a_very_very_long_name(x) of
- #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
- field1=a,
- field2=b} ->
- ok;
- Var = #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
- field1=a,
- field2=b} ->
- Var#'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
- field1=a,
- field2=b};
- #xyz{
- a=1,
- b=2} ->
- ok
- end.
-
-another_function_with_a_very_very_long_name() ->
- #rec{
- field1=1,
- field2=1}.
-
-some_function_name_xyz(xyzzy, #some_record{
- field1=Field1,
- field2=Field2}) ->
- SomeVariable = f(#'Some-long-record-name'{
- field_a = 1,
- 'inter-xyz-parameters' =
- #'Some-other-very-long-record-name'{
- field2 = Field1,
- field2 = Field2}}),
- {ok, SomeVariable}.
-
-commas_first() ->
- {abc, [ {some_var, 1}
-        , {some_other_var, 2}
-        , {erlang_ftw, 9}
-        , {erlang_cookie, 'cookie'}
-        , {cmds,
-            [ {one,   "sudo ls"}
-              , {one,   "sudo ls"}
-              , {two,   "sudo ls"}
-              , {three, "sudo ls"}
-              , {four,  "sudo ls"}
-              , {three, "sudo ls"}
-            ] }
-        , {ssh_username, "yow"}
-        , {cluster,
-            [ {aaaa, [ {"10.198.55.12" , "" }
-                     , {"10.198.55.13" , "" }
-                     ] }
-            , {bbbb, [ {"10.198.55.151", "" }
-                     , {"10.198.55.123", "" }
-                     , {"10.198.55.34" , "" }
-                     , {"10.198.55.85" , "" }
-                     , {"10.198.55.67" , "" }
-                     ] }
-            , {cccc, [ {"10.198.55.68" , "" }
-                     , {"10.198.55.69" , "" }
-                     ] }
-            ] }
-]
-}.
-
-
-%% this used to result in a scan-sexp error
-[{
-}].
-
-%% this used to result in 2x the correct indentation within the function
-%% body, due to the function name being mistaken for a keyword
-catcher(N) ->
-try generate_exception(N) of
-Val -> {N, normal, Val}
-catch
-throw:X -> {N, caught, thrown, X};
-exit:X -> {N, caught, exited, X};
-error:X -> {N, caught, error, X}
-end.
diff --git a/lib/tools/src/cover.erl b/lib/tools/src/cover.erl
index 801bbc7461..bf5faa165d 100644
--- a/lib/tools/src/cover.erl
+++ b/lib/tools/src/cover.erl
@@ -2456,7 +2456,9 @@ do_analyse_to_file1(Module, OutFile, ErlFile, HTML) ->
 
 		    Pattern = {#bump{module=Module,line='$1',_='_'},'$2'},
 		    MS = [{Pattern,[{is_integer,'$1'},{'>','$1',0}],[{{'$1','$2'}}]}],
-		    CovLines = lists:keysort(1,ets:select(?COLLECTION_TABLE, MS)),
+                    CovLines0 =
+                        lists:keysort(1, ets:select(?COLLECTION_TABLE, MS)),
+                    CovLines = merge_dup_lines(CovLines0),
 		    print_lines(Module, CovLines, InFd, OutFd, 1, HTML),
 		    
 		    if HTML ->
@@ -2477,19 +2479,23 @@ do_analyse_to_file1(Module, OutFile, ErlFile, HTML) ->
 	    {error, {file, ErlFile, Reason}}
     end.
 
+merge_dup_lines(CovLines) ->
+    merge_dup_lines(CovLines, []).
+merge_dup_lines([{L, N}|T], [{L, NAcc}|TAcc]) ->
+    merge_dup_lines(T, [{L, NAcc + N}|TAcc]);
+merge_dup_lines([{L, N}|T], Acc) ->
+    merge_dup_lines(T, [{L, N}|Acc]);
+merge_dup_lines([], Acc) ->
+    lists:reverse(Acc).
 
 print_lines(Module, CovLines, InFd, OutFd, L, HTML) ->
     case file:read_line(InFd) of
 	eof ->
 	    ignore;
-	{ok,"%"++_=Line} ->		 %Comment line - not executed.
-	    ok = file:write(OutFd, [tab(),escape_lt_and_gt(Line, HTML)]),
-	    print_lines(Module, CovLines, InFd, OutFd, L+1, HTML);
 	{ok,RawLine} ->
 	    Line = escape_lt_and_gt(RawLine,HTML),
 	    case CovLines of
 	       [{L,N}|CovLines1] ->
-		    %% N = lists:foldl(fun([Ni], Nacc) -> Nacc+Ni end, 0, Ns),
                     if N=:=0, HTML=:=true ->
                            LineNoNL = Line -- "\n",
                            Str = "     0",
@@ -2508,7 +2514,7 @@ print_lines(Module, CovLines, InFd, OutFd, L, HTML) ->
                            ok = file:write(OutFd, [Str,fill3(),Line])
                     end,
 		    print_lines(Module, CovLines1, InFd, OutFd, L+1, HTML);
-		_ ->
+		_ ->                            %Including comment lines
 		    ok = file:write(OutFd, [tab(),Line]),
 		    print_lines(Module, CovLines, InFd, OutFd, L+1, HTML)
 	    end
diff --git a/lib/tools/src/fprof.erl b/lib/tools/src/fprof.erl
index fb657c2928..a3b4bfdddf 100644
--- a/lib/tools/src/fprof.erl
+++ b/lib/tools/src/fprof.erl
@@ -1242,8 +1242,7 @@ spawn_3step(Spawn, FunPrelude, FunAck, FunBody)
 		    catch Child ! {Parent, Ref, Go},
 		    Result
 	    catch
-		Class:Reason ->
-		    Stacktrace = erlang:get_stacktrace(),
+		Class:Reason:Stacktrace ->
 		    catch exit(Child, kill),
 		    erlang:raise(Class, Reason, Stacktrace)
 	    end;
diff --git a/lib/tools/src/lcnt.erl b/lib/tools/src/lcnt.erl
index 139b3d8a4a..d0152a4915 100644
--- a/lib/tools/src/lcnt.erl
+++ b/lib/tools/src/lcnt.erl
@@ -218,9 +218,11 @@ raw()                -> call(raw).
 set(Option, Value)   -> call({set, Option, Value}).
 set({Option, Value}) -> call({set, Option, Value}).
 save(Filename)       -> call({save, Filename}).
-load(Filename)       -> ok = start_internal(), call({load, Filename}).
+load(Filename)       -> call({load, Filename}).
 
-call(Msg) -> gen_server:call(?MODULE, Msg, infinity).
+call(Msg) ->
+    ok = start_internal(),
+    gen_server:call(?MODULE, Msg, infinity).
 
 %% -------------------------------------------------------------------- %%
 %%
@@ -237,7 +239,6 @@ apply(Fun) when is_function(Fun) ->
     lcnt:apply(Fun, []).
 
 apply(Fun, As) when is_function(Fun) ->
-    ok = start_internal(),
     Opt = lcnt:rt_opt({copy_save, true}),
     lcnt:clear(),
     Res = erlang:apply(Fun, As),
@@ -943,7 +944,7 @@ print_state_information(#state{locks = Locks} = State) ->
     print(kv("#tries",          s(Stats#stats.tries))),
     print(kv("#colls",          s(Stats#stats.colls))),
     print(kv("wait time",       s(Stats#stats.time) ++ " us" ++ " ( " ++ s(Stats#stats.time/1000000) ++ " s)")),
-    print(kv("percent of duration", s(Stats#stats.time/State#state.duration*100) ++ " %")),
+    print(kv("percent of duration", s(percent(Stats#stats.time, State#state.duration)) ++ " %")),
     ok.
 
 
diff --git a/lib/tools/test/cover_SUITE.erl b/lib/tools/test/cover_SUITE.erl
index 90e113c178..161b0105b9 100644
--- a/lib/tools/test/cover_SUITE.erl
+++ b/lib/tools/test/cover_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2001-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2017. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -35,7 +35,7 @@ all() ->
                  distribution, reconnect, die_and_reconnect,
                  dont_reconnect_after_stop, stop_node_after_disconnect,
                  export_import, otp_5031, otp_6115,
-                 otp_8270, otp_10979_hanging_node],
+                 otp_8270, otp_10979_hanging_node, otp_14817],
     case whereis(cover_server) of
         undefined ->
             [coverage,StartStop ++ NoStartStop];
@@ -1574,6 +1574,30 @@ otp_10979_hanging_node(_Config) ->
 
     ok.
 
+otp_14817(Config) when is_list(Config) ->
+    Test = <<"-module(otp_14817).
+              -export([a/0, b/0, c/0, d/0]).
+              a() -> ok. b() -> ok. c() -> ok.
+              d() -> ok.
+             ">>,
+    File = cc_mod(otp_14817, Test, Config),
+    ok = otp_14817:a(),
+    ok = otp_14817:b(),
+    ok = otp_14817:c(),
+    ok = otp_14817:d(),
+    {ok,[{{otp_14817,3},1},
+         {{otp_14817,3},1},
+         {{otp_14817,3},1},
+         {{otp_14817,4},1}]} =
+        cover:analyse(otp_14817, calls, line),
+    {ok, CovOut} = cover:analyse_to_file(otp_14817),
+    {ok, Bin} = file:read_file(CovOut),
+    <<"3..|",_/binary>> = string:find(Bin, "3..|"),
+    <<"1..|",_/binary>> = string:find(Bin, "1..|"),
+    ok = file:delete(File),
+    ok = file:delete(CovOut),
+    ok.
+
 %% Take compiler options from beam in cover:compile_beam
 compile_beam_opts(Config) when is_list(Config) ->
     {ok, Cwd} = file:get_cwd(),
diff --git a/lib/tools/test/emacs_SUITE.erl b/lib/tools/test/emacs_SUITE.erl
index 77a8813db5..f4e78da667 100644
--- a/lib/tools/test/emacs_SUITE.erl
+++ b/lib/tools/test/emacs_SUITE.erl
@@ -23,10 +23,10 @@
 
 -export([all/0, init_per_testcase/2, end_per_testcase/2]).
 
--export([bif_highlight/1]).
+-export([bif_highlight/1, indent/1]).
 
-all() -> 
-    [bif_highlight].
+all() ->
+    [bif_highlight, indent].
 
 init_per_testcase(_Case, Config) ->
     ErlangEl = filename:join([code:lib_dir(tools),"emacs","erlang.el"]),
@@ -74,4 +74,69 @@ check_bif_highlight(Bin, Tag, Compare) ->
     [] = Compare -- EmacsIntBifs,
     [] = EmacsIntBifs -- Compare.
     
-    
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+indent(Config) ->
+    case emacs_version_ok() of
+        false -> {skip, "Old or no emacs found"};
+        true ->
+            Def = filename:dirname(code:which(?MODULE)) ++ "/" ++ ?MODULE_STRING ++ "_data",
+            Dir = proplists:get_value(data_dir, Config, Def),
+            OrigFs = filelib:wildcard(Dir ++ "/*"),
+            io:format("Dir: ~s~nFs: ~p~n", [Dir, OrigFs]),
+            Fs = [{File, unindent(File)} || File <- OrigFs,
+                                            filename:extension(File) =:= ""],
+            Indent = fun emacs/1,
+            [Indent(File) || {_, File} <- Fs],
+            Res = [diff(Orig, File) || {Orig, File} <- Fs],
+            [file:delete(File) || {ok, File} <- Res],       %% Cleanup
+            [] = [Fail || {fail, Fail} <- Res],
+            ok
+    end.
+
+unindent(Input) ->
+    Output = Input ++ ".erl",
+    {ok, Bin} = file:read_file(Input),
+    Lines0 = string:split(Bin, "\n", all),
+    Lines = [string:trim(Line, leading, [$\s,$\t]) || Line <- Lines0],
+    %% io:format("File: ~s lines: ~w~n", [Input, length(Lines0)]),
+    %% [io:format("~s~n", [L]) || L <- Lines],
+    ok = file:write_file(Output, lists:join("\n", Lines)),
+    Output.
+
+diff(Orig, File) ->
+    case os:cmd(["diff ", Orig, " ", File]) of
+        "" -> {ok, File};
+        Diff ->
+            io:format("Fail: ~s vs ~s~n~s~n~n",[Orig, File, Diff]),
+            {fail, File}
+    end.
+
+emacs_version_ok() ->
+    case os:cmd("emacs --version | head -1") of
+        "GNU Emacs " ++ Ver ->
+            case string:to_float(Ver) of
+                {Vsn, _} when Vsn >= 24.1 ->
+                    true;
+                _ ->
+                    io:format("Emacs version fail~n~s~n~n",[Ver]),
+                    false
+            end;
+        Res ->
+            io:format("Emacs version fail~n~s~n~n",[Res]),
+            false
+    end.
+
+emacs(File) ->
+    EmacsErlDir = filename:join([code:lib_dir(tools), "emacs"]),
+    Cmd = ["emacs ",
+           "--batch --quick ",
+           "--directory ", EmacsErlDir, " ",
+           "--eval \"(require 'erlang-start)\" ",
+           File, " ",
+           "--eval '(indent-region (point-min) (point-max) nil)' ",
+           "--eval '(save-buffer 0)'"
+          ],
+    _Res = os:cmd(Cmd),
+    % io:format("cmd ~s:~n=> ~s~n", [Cmd, _Res]),
+    ok.
diff --git a/lib/tools/test/emacs_SUITE_data/comments b/lib/tools/test/emacs_SUITE_data/comments
new file mode 100644
index 0000000000..ff974ca295
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/comments
@@ -0,0 +1,25 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% 3 comment chars: always left indented
+%%% 2 comment chars: Context indented
+%%% 1 comment char: Rigth indented
+
+%%% left
+%% context dependent
+                                                % rigth
+
+func() ->
+%%% left
+    %% context dependent
+                                                % right indented
+    case get(foo) of
+        undefined ->
+            %% Testing indention
+            ok;
+        %% Catch all
+        Other ->
+            Other
+    end,
+    ok.
+
diff --git a/lib/tools/test/emacs_SUITE_data/comprehensions b/lib/tools/test/emacs_SUITE_data/comprehensions
new file mode 100644
index 0000000000..45279850a5
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/comprehensions
@@ -0,0 +1,47 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% indentation of comprehensions
+
+%%% Not everything in these test are set in stone
+%%% better indentation rules can be added but by having
+%%% these tests we can see what changes in new implementations
+%%% and notice when doing unintentional changes
+
+list() ->
+    %% I don't have a good idea how we want to handle this
+    %% but they are here to show how they are indented today.
+    Result1 = [X ||
+                  #record{a=X} <- lists:seq(1, 10),
+                  true = (X rem 2)
+              ],
+    Result2 = [X || <<X:32,_:32>> <= <<0:512>>,
+                    true = (X rem 2)
+              ],
+    Res = [ func(X,
+                 arg2)
+            ||
+              #record{a=X} <- lists:seq(1, 10),
+              true = (X rem 2)
+          ],
+    Result1.
+
+binary(B) ->
+    Binary1 = << <<X:8>> ||
+                  #record{a=X} <- lists:seq(1, 10),
+                  true = (X rem 2)
+              >>,
+
+    Binary2 = << <<X:8>> || <<X:32,_:32>> <= <<0:512>>,
+                            true = (X rem 2)
+              >>,
+
+    Bin3 = <<
+             <<
+               X:8,
+               34:8
+             >>
+             || <<X:32,_:32>> <= <<0:512>>,
+                true = (X rem 2)
+           >>,
+    ok.
diff --git a/lib/tools/test/emacs_SUITE_data/funcs b/lib/tools/test/emacs_SUITE_data/funcs
new file mode 100644
index 0000000000..877f982005
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/funcs
@@ -0,0 +1,174 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% Function (and funs) indentation
+
+%%% Not everything in these test are set in stone
+%%% better indentation rules can be added but by having
+%%% these tests we can see what changes in new implementations
+%%% and notice when doing unintentional changes
+
+-export([
+         func1/0,
+         func2/0,
+         a_function_with_a_very_very_long_name/0,
+         when1/2
+        ]).
+
+-compile([nowarn_unused_functions,
+          {inline, [
+                    func2/2,
+                    func3/2
+                   ]
+          }
+         ]).
+
+func1() ->
+    basic.
+
+func2(A1,
+      A2) ->
+    ok.
+
+func3(
+  A1,
+  A2
+ ) ->
+    ok.
+
+%% Okeefe style
+func4(A1
+     ,A2
+     ,A3
+     ) ->
+    ok.
+
+func5(
+  A41
+ ,A42) ->
+    ok.
+
+a_function_with_a_very_very_long_name() ->
+    A00 = #record{
+             field1=1,
+             field2=1
+            },
+    A00.
+
+when1(W1, W2)
+  when is_number(W1),
+       is_number(W2) ->
+    ok.
+
+when2(W1,W2,W3) when
+      W1 > W2,
+      W2 > W3 ->
+    ok.
+
+when3(W1,W2,W3) when
+      W1 > W2,
+      W2 > W3
+      ->
+    ok.
+
+when4(W1,W2,W3)
+  when
+      W1 > W2,
+      W2 > W3 ->
+    ok.
+
+match1({[H|T],
+        Other},
+       M1A2) ->
+    ok.
+
+match2(
+  {
+   [H|T],
+   Other
+  },
+  M2A2
+ ) ->
+    ok.
+
+match3({
+        M3A1,
+        [
+         H |
+         T
+        ],
+        Other
+       },
+       M3A2
+      ) ->
+    ok.
+
+match4(<<
+         M4A:8,
+         M4B:16/unsigned-integer,
+         _/binary
+       >>,
+       M4C) ->
+    ok.
+
+match5(M5A,
+       #record{
+          b=M5B,
+          c=M5C
+         }
+      ) ->
+    ok.
+
+match6(M6A,
+       #{key6a := a6,
+         key6b := b6
+        }) ->
+    ok.
+
+funs(1)
+  when
+      X ->
+    %% Changed fun to one indention level
+    %% 'when' and several clause forces a depth of '4'
+    Var = spawn(fun(X, _)
+                      when X == 2;
+                           X > 10 ->
+                        hello,
+                        case Hello() of
+                            true when is_atom(X) ->
+                                foo;
+                            false ->
+                                bar
+                        end;
+                   (Foo) when is_atom(Foo),
+                              is_integer(X) ->
+                        X = 6 * 45,
+                        Y = true andalso
+                            kalle
+                end),
+    Var;
+funs(2) ->
+    %% check EEP37 named funs
+    Fn1 = fun
+              Factory(N) when
+                    N > 0 ->
+                  F = Fact(N-1),
+                  N * F;
+              Factory(0) ->
+                  1
+          end,
+    Fn1;
+funs(3) ->
+    %% check anonymous funs too
+    Fn2 = fun(0) ->
+                  1;
+             (N) ->
+                  N
+          end,
+    ok;
+funs(4) ->
+    X = lists:foldr(fun(M) ->
+                            <<M/binary, " ">>
+                    end, [], Z),
+    A = <<X/binary, 0:8>>,
+    A.
diff --git a/lib/tools/test/emacs_SUITE_data/highlight b/lib/tools/test/emacs_SUITE_data/highlight
new file mode 100644
index 0000000000..0719f6516a
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/highlight
@@ -0,0 +1,78 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% Open this file in your editor and manually check the colors of
+%%% different types and calls and builtin words
+
+%%% Not everything in these test are set in stone
+%%% better indentation rules can be added but by having
+%%% these tests we can see what changes in new implementations
+%%% and notice when doing unintentional changes
+
+
+highlighting(X)			  % Function definitions should be highlighted
+  when is_integer(X) ->	          % and so should `when' and `is_integer' be
+    %% Highlighting
+    %% Various characters (we keep an `atom' after to see that highlighting ends)
+    $a,atom,			  % Characters should be marked
+    "string",atom,		  % and strings
+    'asdasd',atom,		  % quote should be atoms??
+    'VaV',atom,
+    'aVa',atom,
+    '\'atom',atom,
+    'atom\'',atom,
+    'at\'om',atom,
+    '#1',atom,
+
+    $", atom,					% atom should be ok
+    $', atom,
+
+    "string$", atom,  "string$", atom,  		% currently buggy I know...
+    "string\$", atom,   				% workaround for bug above
+
+    "char $in string", atom,
+
+    'atom$', atom,  'atom$', atom,
+    'atom\$', atom,
+
+    'char $in atom', atom,
+
+    $[, ${, $\\, atom,
+    ?MACRO_1,
+    ?MACRO_2(foo),
+
+    %% Numerical constants
+    16#DD,					% Should not be highlighted
+    32#dd,					% Should not be highlighted
+    32#ddAB,				        % Should not be highlighted
+    32#101,				        % Should not be highlighted
+    32#ABTR,				        % Should not be highlighted
+
+    %% Variables
+    Variables = lists:foo(),
+    _Variables = lists:foo(),
+    AppSpec = Xyz/2,
+    Module42 = Xyz(foo, bar),
+    Module:foo(),
+    _Module:foo(),				%
+    FooÅÅ = lists:reverse([tl,hd,tl,hd]),	%  Should highlight FooÅÅ
+    _FooÅÅ = 42,				%  Should highlight _FooÅÅ
+
+    %% Bifs
+    erlang:registered(),
+    registered(),
+    hd(tl(tl(hd([a,b,c])))),
+    erlang:anything(lists),
+    %% Guards
+    is_atom(foo), is_float(2.3), is_integer(32), is_number(4323.3),
+    is_function(Fun), is_pid(self()),
+    not_a_guard:is_list([]),
+    %% Other Types
+
+    atom,			  % not (currently) hightlighted
+    234234,
+    234.43,
+
+    [list, are, not, higlighted],
+    {nor, is, tuple},
+    ok.
diff --git a/lib/tools/test/emacs_SUITE_data/icr b/lib/tools/test/emacs_SUITE_data/icr
new file mode 100644
index 0000000000..8445c1a74d
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/icr
@@ -0,0 +1,157 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% indentation of if case receive statements
+
+%%% Not everything in these test are set in stone
+%%% better indentation rules can be added but by having
+%%% these tests we can see what changes in new implementations
+%%% and notice when doing unintentional changes
+
+indent_if(1, Z) ->
+    %% If
+    if Z >= 0 ->
+            X = 43 div Z,
+            X;
+       Z =< 10 ->
+            X = 43 div Z,
+            X;
+       Z == 5 orelse
+       Z == 7 ->
+            X = 43 div Z,
+            X;
+       is_number(Z),
+       Z < 32 ->
+            Z;
+       is_number(Z);
+       Z < 32 ->
+            Z * 32;
+       true ->
+            if_works
+    end;
+indent_if(2, Z) ->
+    %% If
+    if
+        Z >= 0 ->
+            X = 43 div Z,
+            X
+      ; Z =< 10 ->
+            43 div Z
+      ; Z == 5 orelse
+        Z == 7 ->
+            X = 43 div Z,
+            X
+      ; is_number(Z),
+        Z < 32 ->
+            Z
+      ; true ->
+            if_works
+    end.
+
+indent_case(1, Z) ->
+    %% Case
+    case {Z, foo, bar} of
+        {Z,_,_} ->
+            X = 43 div 4,
+            foo(X);
+        {Z,_,_}	when
+              Z =:= 42 ->                       % line should be indented as a when
+            X = 43 div 4,
+            foo(X);
+        {Z,_,_}
+          when   Z < 10 orelse
+                 Z =:= foo ->			% Binary op alignment here !!!
+            X = 43 div 4,
+            Bool = Z < 5 orelse                 % Binary op args align differently after when
+                Z =:= foo,                      % and elsewhere ???
+            foo(X);
+        {Z,_,_}
+          when					% when should be indented
+              Z < 10				% and the guards should follow when
+              andalso				% unsure about how though
+              true ->
+            X = 43 div 4,
+            foo(X)
+    end;
+indent_case(2, Z) ->
+    %% Case
+    case {Z, foo, bar} of
+        {Z,_,_} ->
+            X = 43 div 4,
+            foo(X)
+      ; {Z,_,_}	when
+              Z =:= 42 ->                       % line should be indented as a when
+            X = 43 div 4,
+            foo(X)
+      ; {Z,_,_}
+          when Z < 10 ->			% when should be indented
+            X = 43 div 4,
+            foo(X)
+      ; {Z,_,_}
+          when					% when should be indented
+              Z < 10				% and the guards should follow when
+              andalso				% unsure about how though
+              true ->
+            X = 43 div 4,
+            foo(X)
+    end.
+
+indent_begin(Z) ->
+    %% Begin
+    begin
+        sune,
+        Z = 74234 +
+            foo(8456) +
+            345 div 43,
+        Foo = begin
+                  ok,
+                  foo(234),
+                  begin
+                      io:format("Down here\n")
+                  end
+              end,
+        {Foo,
+         bar}
+    end.
+
+indent_receive(1) ->
+    %% receive
+    receive
+        {Z,_,_} ->
+            X = 43 div 4,
+            foo(X)
+      ; Z ->
+            X = 43 div 4,
+            foo(X)
+    end,
+    ok;
+indent_receive(2) ->
+    receive
+        {Z,_,_} ->
+            X = 43 div 4,
+            foo(X);
+        Z 					% added clause
+          when Z =:= 1 ->			% This line should be indented by 2
+            X = 43 div 4,
+            foo(X);
+        Z when					% added clause
+              Z =:= 2 ->			% This line should be indented by 2
+            X = 43 div 4,
+            foo(X);
+        Z ->
+            X = 43 div 4,
+            foo(X)
+    after infinity ->
+            foo(X),
+            asd(X),
+            5*43
+    end,
+    ok;
+indent_receive() ->
+    receive
+    after 10 ->
+            foo(X),
+            asd(X),
+            5*43
+    end,
+    ok.
diff --git a/lib/tools/test/emacs_SUITE_data/macros b/lib/tools/test/emacs_SUITE_data/macros
new file mode 100644
index 0000000000..6c874e9187
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/macros
@@ -0,0 +1,31 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% Macros should be indented as code
+
+-define(M0, ok).
+
+-define(M1,
+        case X of
+            undefined -> error;
+            _ -> ok
+        end).
+
+-define(M2(M2A1,
+           M2A2),
+        func(M2A1,
+             M2A2)
+       ).
+
+-define(
+   M3,
+   undefined
+  ).
+
+-ifdef(DEBUG).
+-define(LOG,
+        logger:log(?MODULE,?LINE)
+       ).
+-else().
+-define(LOG, ok).
+-endif().
diff --git a/lib/tools/test/emacs_SUITE_data/records b/lib/tools/test/emacs_SUITE_data/records
new file mode 100644
index 0000000000..241582718c
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/records
@@ -0,0 +1,35 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%% Test that records are indented correctly
+
+-record(record0,
+        {
+         r0a,
+         r0b,
+         r0c
+        }).
+
+-record(record1, {r1a,
+                  r1b,
+                  r1c
+                 }).
+
+-record(record2, {
+                  r2a,
+                  r2b
+                 }).
+
+-record(record3, {r3a = 8#42423 bor
+                      8#4234,
+                  r3b = 8#5432
+                      bor 2#1010101,
+                  r3c = 123 +
+                      234,
+                  r3d}).
+
+-record(record5,
+        { r5a = 1 :: integer()
+        , r5b = foobar :: atom()
+        }).
+
diff --git a/lib/tools/test/emacs_SUITE_data/terms b/lib/tools/test/emacs_SUITE_data/terms
new file mode 100644
index 0000000000..352364a73c
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/terms
@@ -0,0 +1,174 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% indentation of terms contain builtin types
+
+%%% Not everything in these test are set in stone
+%%% better indentation rules can be added but by having
+%%% these tests we can see what changes in new implementations
+%%% and notice when doing unintentional changes
+
+
+list(1) ->
+    [a,
+     b,
+     c
+    ];
+list(2) ->
+    [ a,
+      b, c
+    ];
+list(3) ->
+    [
+     a,
+     b, c
+    ];
+list(4) ->
+    [ a
+    , b
+    , c
+    ].
+
+tuple(1) ->
+    {a,
+     b,c
+    };
+tuple(2) ->
+    { a,
+      b,c
+    };
+tuple(3) ->
+    {
+     a,
+     b,c
+    };
+tuple(4) ->
+    { a
+    , b
+    ,c
+    }.
+
+binary(1) ->
+    <<1:8,
+      2:8
+    >>;
+binary(2) ->
+    <<
+      1:8,
+      2:8
+    >>;
+binary(3) ->
+    << 1:8,
+       2:8
+    >>;
+binary(4) ->
+    <<
+      1:8
+     ,2:8
+    >>;
+binary(5) ->
+    << 1:8
+     , 2:8
+    >>.
+
+record(1) ->
+    #record{a=1,
+            b=2
+           };
+record(2) ->
+    #record{ a=1,
+             b=2
+           };
+record(3) ->
+    #record{
+       a=1,
+       b=2
+      };
+record(4) ->
+    #record{
+       a=1
+      ,b=2
+      };
+record(Record) ->
+    Record#record{
+      a=1
+     ,b=2
+     }.
+
+map(1) ->
+    #{a=>1,
+      b=>2
+     };
+map(2) ->
+    #{ a=>1,
+       b=>2
+     };
+map(3) ->
+    #{
+      a=>1,
+      b=>2
+     };
+map(4) ->
+    #{
+      a => <<"a">>
+     ,b => 2
+     };
+map(MapVar) ->
+    MapVar = #{a :=<<"a">>
+              ,b:=1}.
+
+deep(Rec) ->
+    Rec#rec{ atom = 'atom',
+             map = #{ k1 => {v,
+                             1},
+                      k2 => [
+                             1,
+                             2,
+                             3
+                            ],
+                      {key,
+                       3}
+                      =>
+                          <<
+                            123:8,
+                            255:8
+                          >>
+                    }
+           }.
+
+%% Record indentation
+some_function_with_a_very_long_name() ->
+    #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
+       field1=a,
+       field2=b},
+    case dummy_function_with_a_very_very_long_name(x) of
+        #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
+           field1=a,
+           field2=b} ->
+            ok;
+        Var = #'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
+                 field1=a,
+                 field2=b} ->
+            Var#'a-long-record-name-like-it-sometimes-is-with-asn.1-records'{
+              field1=a,
+              field2=b};
+        #xyz{
+           a=1,
+           b=2} ->
+            ok
+    end.
+
+some_function_name_xyz(xyzzy, #some_record{
+                                 field1=Field1,
+                                 field2=Field2}) ->
+    SomeVariable = f(#'Some-long-record-name'{
+                        field_a = 1,
+                        'inter-xyz-parameters' =
+                            #'Some-other-very-long-record-name'{
+                               field2 = Field1,
+                               field2 = Field2}}),
+    {ok, SomeVariable}.
+
+foo() ->
+    [#foo{
+        foo = foo}].
diff --git a/lib/tools/test/emacs_SUITE_data/try_catch b/lib/tools/test/emacs_SUITE_data/try_catch
new file mode 100644
index 0000000000..0005b2003a
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/try_catch
@@ -0,0 +1,166 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%%% Try and catch indentation is hard
+
+%%% Not everything in these test are set in stone
+%%% better indentation rules can be added but by having
+%%% these tests we can see what changes in new implementations
+%%% and notice when doing unintentional changes
+
+try_catch() ->
+    try
+        io:format(stdout, "Parsing file ~s, ",
+                  [St0#leex.xfile]),
+        {ok,Line3,REAs,Actions,St3} =
+            parse_rules(Xfile, Line2, Macs, St2)
+    catch
+        exit:{badarg,R} ->
+            foo(R),
+            io:format(stdout,
+                      "ERROR reason ~p~n",
+                      R);
+        error:R
+          when R =:= 42 ->			% when should be indented
+            foo(R);
+        error:R
+          when					% when should be indented
+              R =:= 42 ->			% but unsure about this (maybe 2 more)
+            foo(R);
+        error:R when
+              R =:= foo ->			% line should be 2 indented (works)
+            foo(R);
+        error:R ->
+            foo(R),
+            io:format(stdout,
+                      "ERROR reason ~p~n",
+                      R)
+    after
+        foo('after'),
+        file:close(Xfile)
+    end;
+try_catch() ->
+    try
+        foo(bar)
+    of
+        X when true andalso
+               kalle ->
+            io:format(stdout, "Parsing file ~s, ",
+                      [St0#leex.xfile]),
+            {ok,Line3,REAs,Actions,St3} =
+                parse_rules(Xfile, Line2, Macs, St2);
+        X
+          when false andalso			% when should be 2 indented
+               bengt ->
+            gurka();
+        X when
+              false andalso			% line should be 2 indented
+              not bengt ->
+            gurka();
+        X ->
+            io:format(stdout, "Parsing file ~s, ",
+                      [St0#leex.xfile]),
+            {ok,Line3,REAs,Actions,St3} =
+                parse_rules(Xfile, Line2, Macs, St2)
+    catch
+        exit:{badarg,R} ->
+            foo(R),
+            io:format(stdout,
+                      "ERROR reason ~p~n",
+                      R);
+        error:R ->
+            foo(R),
+            io:format(stdout,
+                      "ERROR reason ~p~n",
+                      R)
+    after
+        foo('after'),
+        file:close(Xfile),
+        bar(with_long_arg,
+            with_second_arg)
+    end;
+try_catch() ->
+    try foo()
+    after
+        foo(),
+        bar(with_long_arg,
+            with_second_arg)
+    end.
+
+indent_catch() ->
+    D = B +
+        float(43.1),
+
+    B = catch oskar(X),
+
+    A = catch (baz +
+                   bax),
+    catch foo(),
+
+    C = catch B +
+        float(43.1),
+
+    case catch foo(X) of
+        A ->
+            B
+    end,
+
+    case
+        catch foo(X)
+    of
+        A ->
+            B
+    end,
+
+    case
+        foo(X)
+    of
+        A ->
+            catch B,
+            X
+    end,
+
+    try sune of
+        _ -> foo
+    catch _:_ -> baf
+    end,
+
+    Variable = try
+                   sune
+               of
+                   _ ->
+                       X = 5,
+                       (catch foo(X)),
+                       X + 10
+               catch _:_ -> baf
+               after cleanup()
+               end,
+
+    try
+        (catch sune)
+    of
+        _ ->
+            foo1(),
+    catch foo()  %% BUGBUG can't handle catch inside try without parentheses
+    catch _:_ ->
+            baf
+    end,
+
+    try
+        (catch exit())
+    catch
+        _ ->
+            catch baf()
+    end,
+    ok.
+
+%% this used to result in 2x the correct indentation within the function
+%% body, due to the function name being mistaken for a keyword
+catcher(N) ->
+    try generate_exception(N) of
+        Val -> {N, normal, Val}
+    catch
+        throw:X -> {N, caught, thrown, X};
+        exit:X -> {N, caught, exited, X};
+        error:X -> {N, caught, error, X}
+    end.
diff --git a/lib/tools/test/emacs_SUITE_data/type_specs b/lib/tools/test/emacs_SUITE_data/type_specs
new file mode 100644
index 0000000000..e71841cc7a
--- /dev/null
+++ b/lib/tools/test/emacs_SUITE_data/type_specs
@@ -0,0 +1,110 @@
+%% -*- Mode: erlang; indent-tabs-mode: nil -*-
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+
+%% Tests how types and specs are indented (also that the editor can parse them)
+%% May need improvements
+
+
+-type ann() :: Var :: integer().
+-type ann2() ::
+        'return'
+      | 'return_white_spaces'
+      | 'return_comments'
+      | 'text' | ann().
+-type paren() ::
+        (ann2()).
+
+-type t6() ::
+        1 | 2 | 3 |
+        'foo'
+      | 'bar'.
+
+-type t8() :: {any(),none(),pid(),port(),
+               reference(),float()}.
+
+-type t14() :: [erl_scan:foo() |
+                %% Should be highlighted
+                term() |
+                boolean() |
+                byte() |
+                char() |
+                non_neg_integer() | nonempty_list() |
+                pos_integer() |
+                neg_integer() |
+                number() |
+                list() |
+                nonempty_improper_list() | nonempty_maybe_improper_list() |
+                maybe_improper_list() | string() | iolist() | byte() |
+                module() |
+                mfa()   |
+                node()  |
+                timeout() |
+                no_return() |
+                %% Should not be highlighted
+                nonempty_() | nonlist() |
+                erl_scan:bar(34, 92) | t13() | m:f(integer() | <<_:_*16>>)].
+
+-type t15() :: {binary(),<<>>,<<_:34>>,<<_:_*42>>,
+                <<_:3,_:_*14>>,<<>>} | [<<>>|<<_:34>>|<<_:16>>|
+                                        <<_:3,_:_*1472>>|<<_:19,_:_*14>>| <<_:34>>|
+                                        <<_:34>>|<<_:34>>|<<_:34>>].
+
+-type t18() ::
+        fun(() -> t17() | t16()).
+-type t19() ::
+        fun((t18()) -> t16()) |
+        fun((nonempty_maybe_improper_list('integer', any())|
+             1|2|3|a|b|<<_:3,_:_*14>>|integer())
+            ->
+                   nonempty_maybe_improper_list('integer', any())|   %% left to col 16?
+                   1|2|3|a|b|<<_:3,_:_*14>>|integer()).              %% left to col 16?
+-type t20() :: [t19(), ...].
+-type t25() :: #rec3{f123 :: [t24() |
+                              1|2|3|4|a|b|c|d|
+                              nonempty_maybe_improper_list(integer, any())]}.
+-type t26() :: #rec4{ a :: integer()
+                    , b :: any()
+                    }.
+
+%% Spec
+
+-spec t1(FooBar :: t99()) -> t99();
+        (t2()) -> t2();
+        (t4()) -> t4() when is_subtype(t4(), t24);
+        (t23()) -> t23() when is_subtype(t23(), atom()),
+                              is_subtype(t23(), t14());
+        (t24()) -> t24() when is_subtype(t24(), atom()),
+                              is_subtype(t24(), t14()),
+                              is_subtype(t24(), t4()).
+
+-spec over(I :: integer()) -> R1 :: foo:typen();
+          (A :: atom()) -> R2 :: foo:atomen();
+          (T :: tuple()) -> R3 :: bar:typen().
+
+-spec mod:t2() -> any().
+
+-spec handle_cast(Cast :: {'exchange', node(), [[name(),...]]}
+                        | {'del_member', name(), pid()},
+                  #state{}) -> {'noreply', #state{}}.
+
+-spec handle_cast(Cast ::
+                    {'exchange', node(), [[name(),...]]}
+                  | {'del_member', name(), pid()},
+                  #state{}) ->
+                         {'noreply', #state{}}. %% left to col 10?
+
+-spec all(fun((T) -> boolean()), List :: [T]) ->
+                 boolean() when is_subtype(T, term()). % (*)
+
+-spec get_closest_pid(term()) ->
+                             Return :: pid()  %% left to col 10?
+                                     | {'error', {'no_process', term()}} %% left to col 10?
+                                     | {'no_such_group', term()}. %% left to col 10?
+
+-spec add( X :: integer()
+         , Y :: integer()
+         ) -> integer().
+
+-opaque attributes_data() ::
+          [{'column', column()} | {'line', info_line()} |
+           {'text', string()}] |  {line(),column()}.
diff --git a/lib/tools/test/fprof_SUITE.erl b/lib/tools/test/fprof_SUITE.erl
index 8fd164a4b3..ae0e7253ad 100644
--- a/lib/tools/test/fprof_SUITE.erl
+++ b/lib/tools/test/fprof_SUITE.erl
@@ -51,7 +51,7 @@
 
 suite() ->
     [{ct_hooks,[ts_install_cth]},
-     {timetrap,{seconds,60}}].
+     {timetrap,{seconds,240}}].
 
 all() -> 
     case test_server:is_native(fprof_SUITE) of
@@ -571,7 +571,7 @@ seq_r(Start, Stop, Succ, R) ->
 
 create_file_slow(Name, N) when is_integer(N), N >= 0 ->
     {ok, FD} = 
-    file:open(Name, [raw, write, delayed_write, binary]),
+    file:open(Name, [raw, write, binary]),
     if N > 256 ->
            ok = file:write(FD,
                            lists:map(fun (X) -> <<X:32/unsigned>> end,
diff --git a/lib/tools/test/lcnt_SUITE.erl b/lib/tools/test/lcnt_SUITE.erl
index 146c915087..a79572a742 100644
--- a/lib/tools/test/lcnt_SUITE.erl
+++ b/lib/tools/test/lcnt_SUITE.erl
@@ -30,6 +30,8 @@
          t_conflicts/1,
          t_locations/1,
          t_swap_keys/1,
+         t_implicit_start/1,
+         t_crash_before_collect/1,
          smoke_lcnt/1]).
 
 init_per_testcase(_Case, Config) ->
@@ -44,8 +46,8 @@ suite() ->
      {timetrap,{minutes,4}}].
 
 all() ->
-    [t_load, t_conflicts, t_locations, t_swap_keys,
-     smoke_lcnt].
+    [t_load, t_conflicts, t_locations, t_swap_keys, t_implicit_start,
+     t_crash_before_collect, smoke_lcnt].
 
 %%----------------------------------------------------------------------
 %% Tests
@@ -149,6 +151,15 @@ t_swap_keys_file([File|Files]) ->
     ok = lcnt:stop(),
     t_swap_keys_file(Files).
 
+%% Prior to OTP-14913 this would crash with 'noproc' as the lcnt server hadn't
+%% been started yet.
+t_implicit_start(Config) when is_list(Config) ->
+    ok = lcnt:conflicts().
+
+t_crash_before_collect(Config) when is_list(Config) ->
+    {ok, _} = lcnt:start(),
+    ok = lcnt:information().
+
 %% Simple smoke test of actual lock-counting, if running on
 %% a run-time with lock-counting enabled.
 smoke_lcnt(Config) ->
diff --git a/lib/tools/test/xref_SUITE.erl b/lib/tools/test/xref_SUITE.erl
index d651cbcfee..018f632948 100644
--- a/lib/tools/test/xref_SUITE.erl
+++ b/lib/tools/test/xref_SUITE.erl
@@ -1112,27 +1112,16 @@ read_expected(Version) ->
           {POS7+2,{FF,{erlang,spawn_opt,4}}},
           {POS8+1,{FF,{hej,san,1}}},
           {POS8+4,{FF,{a,b,1}}},
-          {POS8+4,{FF,{erlang,apply,2}}},
-          {POS8+5,{FF,{erlang,apply,2}}},
           {POS8+6,{FF,{m,f,1}}},
           {POS9+1,{FF,{read,bi,0}}},
           {POS9+2,{FF,{a,b,1}}},
-          {POS9+2,{FF,{erlang,apply,2}}},
-          {POS9+3,{FF,{erlang,apply,2}}},
-          {POS9+4,{FF,{erlang,apply,2}}},
           {POS9+4,{FF,{erlang,not_a_function,1}}},
           {POS9+5,{FF,{mod,func,2}}},
           {POS9+6,{FF,{erlang,apply,1}}},
-          {POS9+7,{FF,{erlang,apply,2}}},
           {POS9+7,{FF,{math,add3,1}}},
           {POS9+8,{FF,{q,f,1}}},
-          {POS10+4,{FF,{erlang,apply,2}}},
           {POS10+5,{FF,{mod1,fun1,1}}},
-          {POS11+6,{FF,{erlang,apply,2}}},
-          {POS12+1,{FF,{erlang,apply,2}}},
-          {POS12+4,{FF,{erlang,apply,2}}},
           {POS12+5,{FF,{m3,f3,2}}},
-          {POS12+7,{FF,{erlang,apply,2}}},
           {POS13+1,{FF,{dm,df,1}}},
           {POS13+6,{{read,bi,0},{foo,module_info,0}}},
           {POS13+7,{{read,bi,0},{read,module_info,0}}},
@@ -1162,15 +1151,26 @@ read_expected(Version) ->
             {POS3+3,  {FF,{erlang,spawn_link,3}}},
             {POS3+4, {FF,{erlang,spawn_link,3}}},
             {POS6+4, {FF,{erlang,spawn,3}}},
+            {POS8+4,{FF,{erlang,apply,2}}},
+            {POS8+5,{FF,{erlang,apply,2}}},
             {POS8+6,{FF,{erlang,apply,3}}},
             {POS8+7,{FF,{erlang,apply,3}}},
             {POS9+1,{FF,{erlang,apply,3}}},
+            {POS9+2,{FF,{erlang,apply,2}}},
+            {POS9+3,{FF,{erlang,apply,2}}},
+            {POS9+4,{FF,{erlang,apply,2}}},
             {POS9+5,{FF,{erlang,apply,3}}},
+            {POS9+7,{FF,{erlang,apply,2}}},
+            {POS10+4,{FF,{erlang,apply,2}}},
             {POS11+1,{FF,{erlang,apply,3}}},
             {POS11+2,{FF,{erlang,apply,3}}},
             {POS11+3,{FF,{erlang,apply,3}}},
             {POS11+4,{FF,{erlang,apply,3}}},
+            {POS11+6,{FF,{erlang,apply,2}}},
+            {POS12+1,{FF,{erlang,apply,2}}},
+            {POS12+4,{FF,{erlang,apply,2}}},
             {POS12+5,{FF,{erlang,apply,3}}},
+            {POS12+7,{FF,{erlang,apply,2}}},
             {POS12+8,{FF,{erlang,apply,3}}},
             {POS13+5, {{read,bi,0},{erlang,length,1}}},
             {POS14+3, {{read,bi,0},{erlang,length,1}}}],
diff --git a/lib/tools/vsn.mk b/lib/tools/vsn.mk
index b9249ae45c..f9723c0f9b 100644
--- a/lib/tools/vsn.mk
+++ b/lib/tools/vsn.mk
@@ -1 +1 @@
-TOOLS_VSN = 2.11
+TOOLS_VSN = 2.11.2
diff --git a/lib/wx/api_gen/gen_util.erl b/lib/wx/api_gen/gen_util.erl
index 5e2f405498..3068a2f4ea 100644
--- a/lib/wx/api_gen/gen_util.erl
+++ b/lib/wx/api_gen/gen_util.erl
@@ -106,8 +106,8 @@ check_diff(Diff) ->
 	throw:_ ->  diff;
 	error:{badmatch,_} ->
 	    diff;
-	_:What ->
-	    io:format("~p:~p: ~p ~p~n", [?MODULE,?LINE, What, erlang:get_stacktrace()]),
+	_:What:Stacktrace ->
+	    io:format("~p:~p: ~p ~p~n", [?MODULE,?LINE, What, Stacktrace]),
 	    diff
     end.
 
diff --git a/lib/wx/api_gen/gl_gen.erl b/lib/wx/api_gen/gl_gen.erl
index 7e3766a43b..6f68517c16 100644
--- a/lib/wx/api_gen/gl_gen.erl
+++ b/lib/wx/api_gen/gl_gen.erl
@@ -47,9 +47,9 @@ safe(What, QuitOnErr) ->
 	What(),
 	io:format("Completed successfully~n~n", []),
 	QuitOnErr andalso gen_util:halt(0)
-    catch Err:Reason ->
+    catch Err:Reason:Stacktrace ->
 	    io:format("Error ~p: ~p:~p~n  ~p~n", 
-		      [get(current_func),Err,Reason,erlang:get_stacktrace()]),
+		      [get(current_func),Err,Reason,Stacktrace]),
 	    (catch gen_util:close()),
 	    timer:sleep(1999),
 	    QuitOnErr andalso gen_util:halt(1)
diff --git a/lib/wx/api_gen/gl_gen_erl.erl b/lib/wx/api_gen/gl_gen_erl.erl
index 45f5fd8f4c..7e673c2987 100644
--- a/lib/wx/api_gen/gl_gen_erl.erl
+++ b/lib/wx/api_gen/gl_gen_erl.erl
@@ -246,8 +246,8 @@ gen_types(Where) ->
 
 gen_export(F) ->
     try gen_export_1(F)
-    catch E:R ->
-	    io:format("Crash ~p:~p in ~p ~n",[E,R, erlang:get_stacktrace()]),
+    catch E:R:S ->
+	    io:format("Crash ~p:~p in ~p ~n",[E,R,S]),
 	    io:format("Func = ~p~n  ~p", [F, get(F)])
     end.
 
@@ -489,8 +489,8 @@ doc_return_types2(T, Ps) ->
 doc_arg_type(#arg{name=Name,type=T}) ->
     try
 	erl_arg_name(Name) ++ " :: " ++ doc_arg_type2(T)
-    catch _:Error ->
-	    io:format("Error spec: ~p ~p~n~p~n",[Name, Error, erlang:get_stacktrace()]),
+    catch _:Error:Stacktrace ->
+	    io:format("Error spec: ~p ~p~n~p~n",[Name, Error, Stacktrace]),
 	    exit(error)
     end.
 
diff --git a/lib/wx/api_gen/wx_gen.erl b/lib/wx/api_gen/wx_gen.erl
index aadfe4b111..ab70a588ab 100644
--- a/lib/wx/api_gen/wx_gen.erl
+++ b/lib/wx/api_gen/wx_gen.erl
@@ -47,9 +47,9 @@ safe(What, QuitOnErr) ->
 	What(),
 	io:format("Completed successfully~n~n", []),
 	QuitOnErr andalso gen_util:halt(0)
-    catch Err:Reason ->
+    catch Err:Reason:Stacktrace ->
 	    io:format("Error in ~p ~p~n", [get(current_class),get(current_func)]),
-	    erlang:display({Err,Reason, erlang:get_stacktrace()}),
+	    erlang:display({Err,Reason,Stacktrace}),
 	    catch gen_util:close(),
 	    QuitOnErr andalso gen_util:halt(1)
     end.
diff --git a/lib/wx/c_src/wxe_driver.c b/lib/wx/c_src/wxe_driver.c
index 5da71818e5..26ae3564e7 100644
--- a/lib/wx/c_src/wxe_driver.c
+++ b/lib/wx/c_src/wxe_driver.c
@@ -33,6 +33,7 @@
 #include <sys/types.h>
 #include <fcntl.h>
 
+#include <assert.h>
 #include "wxe_driver.h"
 
 #define TEMP_BINARY_SIZE 512
@@ -234,13 +235,21 @@ standard_outputv(ErlDrvData drv_data, ErlIOVec* ev)
        sd->max_bins = max;
    }
 
-   if(ev->vsize == 2) {
-      binref->base = ev->iov[1].iov_base;
-      binref->size = ev->iov[1].iov_len;
-      binref->from = driver_caller(sd->port_handle);
-      bin = ev->binv[1];
-      driver_binary_inc_refc(bin); /* Otherwise it could get deallocated */
-      binref->bin = bin;
+   if(ev->size > 0) {
+       assert(ev->vsize == 2 && ev->iov[0].iov_len == 0
+              && "erts changed how the ErlIOVec is structured for outputv");
+       binref->from = driver_caller(sd->port_handle);
+       binref->size = ev->iov[1].iov_len;
+       if(ev->binv[1]) {
+           binref->base = ev->iov[1].iov_base;
+           bin = ev->binv[1];
+           driver_binary_inc_refc(bin); /* Otherwise it could get deallocated */
+       } else {
+           bin = driver_alloc_binary(ev->iov[1].iov_len);
+           memcpy(bin->orig_bytes, ev->iov[1].iov_base, ev->iov[1].iov_len);
+           binref->base = bin->orig_bytes;
+       }
+       binref->bin = bin;
    } else { /* Empty binary (becomes NULL) */
       binref->base = NULL;
       binref->size = 0;
diff --git a/lib/wx/c_src/wxe_ps_init.c b/lib/wx/c_src/wxe_ps_init.c
index e6b677d469..277f3ac25f 100644
--- a/lib/wx/c_src/wxe_ps_init.c
+++ b/lib/wx/c_src/wxe_ps_init.c
@@ -61,13 +61,20 @@ int is_packaged_app() {
 void * wxe_ps_init2() {
    NSAutoreleasePool *pool;
    ProcessSerialNumber psn;
-
+   size_t app_len = 127;
+   char app_title_buf[128];
+   char * app_title;
    // Setup and enable gui
    pool = [[NSAutoreleasePool alloc] init];
-   
+
    if( !is_packaged_app() ) {
       // Undocumented function (but no documented way of doing this exists)
-      char *app_title = getenv("WX_APP_TITLE");
+      int res = erl_drv_getenv("WX_APP_TITLE", app_title_buf, &app_len);
+      if (res >= 0) {
+          app_title = app_title_buf;
+      } else {
+          app_title = NULL;
+      }
       if(!GetCurrentProcess(&psn)) {
       	 CPSSetProcessName(&psn, app_title?app_title:"Erlang");
       }
diff --git a/lib/wx/doc/src/notes.xml b/lib/wx/doc/src/notes.xml
index 599b5b64fd..69ea906ec0 100644
--- a/lib/wx/doc/src/notes.xml
+++ b/lib/wx/doc/src/notes.xml
@@ -32,6 +32,22 @@
   <p>This document describes the changes made to the wxErlang
     application.</p>
 
+<section><title>Wx 1.8.3</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+          <p>
+	    wx crashes in otp 20.1 if empty binaries was sent down as
+	    arguments.</p>
+          <p>
+	    Own Id: OTP-14688</p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Wx 1.8.2</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/wx/examples/demo/ex_aui.erl b/lib/wx/examples/demo/ex_aui.erl
index d8fc0021f1..97805621ed 100644
--- a/lib/wx/examples/demo/ex_aui.erl
+++ b/lib/wx/examples/demo/ex_aui.erl
@@ -87,8 +87,7 @@ do_init(Config) ->
 	wxAuiManager:update(Manager),
 	process_flag(trap_exit, true),
 	{Panel, #state{parent=Panel, config=Config, aui=Manager}}
-    catch Class:Reason ->
-	    ST = erlang:get_stacktrace(),
+    catch Class:Reason:ST ->
 	    io:format("AUI Crashed ~p ~p~n",[Reason, ST]),
 	    wxAuiManager:unInit(Manager),
 	    wxAuiManager:destroy(Manager),
diff --git a/lib/wx/src/wx.erl b/lib/wx/src/wx.erl
index 34bf06cf46..6dd3c148db 100644
--- a/lib/wx/src/wx.erl
+++ b/lib/wx/src/wx.erl
@@ -183,7 +183,7 @@ batch(Fun) ->
     ok = wxe_util:cast(?BATCH_BEGIN, <<>>),
     try Fun()
     catch
-	error:W -> erlang:exit({W, erlang:get_stacktrace()});
+	error:W:S -> erlang:exit({W, S});
 	throw:W -> erlang:throw(W);
 	exit:W  -> erlang:exit(W)
     after
@@ -196,7 +196,7 @@ foreach(Fun, List) ->
     ok = wxe_util:cast(?BATCH_BEGIN, <<>>),
     try lists:foreach(Fun, List)
     catch
-	error:W -> erlang:exit({W, erlang:get_stacktrace()});
+	error:W:S -> erlang:exit({W, S});
 	throw:W -> erlang:throw(W);
 	exit:W  -> erlang:exit(W)
     after
@@ -209,7 +209,7 @@ map(Fun, List) ->
     ok = wxe_util:cast(?BATCH_BEGIN, <<>>),
     try lists:map(Fun, List)
     catch
-	error:W -> erlang:exit({W, erlang:get_stacktrace()});
+	error:W:S -> erlang:exit({W, S});
 	throw:W -> erlang:throw(W);
 	exit:W  -> erlang:exit(W)
     after
@@ -222,7 +222,7 @@ foldl(Fun, Acc, List) ->
     ok = wxe_util:cast(?BATCH_BEGIN, <<>>),
     try lists:foldl(Fun, Acc, List)
     catch
-	error:W -> erlang:exit({W, erlang:get_stacktrace()});
+	error:W:S -> erlang:exit({W, S});
 	throw:W -> erlang:throw(W);
 	exit:W  -> erlang:exit(W)
     after
@@ -235,7 +235,7 @@ foldr(Fun, Acc, List) ->
     ok = wxe_util:cast(?BATCH_BEGIN, <<>>),
     try lists:foldr(Fun, Acc, List)
     catch
-	error:W -> erlang:exit({W, erlang:get_stacktrace()});
+	error:W:S -> erlang:exit({W, S});
 	throw:W -> erlang:throw(W);
 	exit:W  -> erlang:exit(W)
     after
diff --git a/lib/wx/src/wxe_master.erl b/lib/wx/src/wxe_master.erl
index ce859b3eb3..a55917f0aa 100644
--- a/lib/wx/src/wxe_master.erl
+++ b/lib/wx/src/wxe_master.erl
@@ -122,16 +122,9 @@ init([SilentStart]) ->
 	    erlang:error(not_smp)
     end,
 
-    case os:type() of
-        {win32,_} ->  %% Needed for mingwm10.dll
-            Path = os:getenv("PATH"),
-            os:putenv("PATH", PrivDir ++ ";" ++ Path);
-        _ -> ok
-    end,
-
     case erl_ddll:load_driver(PrivDir,DriverName) of
 	ok -> ok;
-	{error, What} -> 
+	{error, What} ->
 	    wxe_util:opt_error_log(SilentStart,
                                    "WX Failed loading ~p@~p ~n",
                                    [DriverName,PrivDir]),
@@ -139,8 +132,8 @@ init([SilentStart]) ->
 	    erlang:error({load_driver,Str})
     end,
     process_flag(trap_exit, true),
-    DriverWithArgs = DriverName ++ " " ++ code:priv_dir(wx) ++ [0],
-    
+    DriverWithArgs = DriverName ++ " " ++ code:priv_dir(wx),
+
     try
 	Port = open_port({spawn, DriverWithArgs},[binary]),
 	wx_debug_info = ets:new(wx_debug_info, [named_table]),
diff --git a/lib/wx/src/wxe_server.erl b/lib/wx/src/wxe_server.erl
index 58fcaf8f23..d6d9dbd629 100644
--- a/lib/wx/src/wxe_server.erl
+++ b/lib/wx/src/wxe_server.erl
@@ -283,10 +283,10 @@ invoke_callback(Pid, Ev, Ref) ->
 				 Return -> exit({bad_return, Return})
 			     end
 		     end
-		 catch _:Reason ->
+		 catch _:Reason:Stacktrace ->
 			 wxEvent:skip(Ref),
 			 ?log("Callback fun crashed with {'EXIT, ~p, ~p}~n",
-			      [Reason, erlang:get_stacktrace()])
+			      [Reason, Stacktrace])
 		 end,
 		 wxe_util:cast(?WXE_CB_RETURN, <<>>)
 	 end,
@@ -299,9 +299,9 @@ invoke_callback_fun(Fun) ->
 	      Return = Fun(),
 	      true = is_binary(Return),
 	      Return
-	  catch _:Reason ->
+	  catch _:Reason:Stacktrace ->
 		  ?log("Callback fun crashed with {'EXIT, ~p, ~p}~n",
-		       [Reason, erlang:get_stacktrace()]),
+		       [Reason, Stacktrace]),
 		  <<>>
 	  end,
     wxe_util:cast(?WXE_CB_RETURN, Res).
diff --git a/lib/wx/vsn.mk b/lib/wx/vsn.mk
index 039fae322e..7da4529c98 100644
--- a/lib/wx/vsn.mk
+++ b/lib/wx/vsn.mk
@@ -1 +1 @@
-WX_VSN = 1.8.2
+WX_VSN = 1.8.3
diff --git a/lib/xmerl/doc/src/notes.xml b/lib/xmerl/doc/src/notes.xml
index 1162561225..f62a8dc53d 100644
--- a/lib/xmerl/doc/src/notes.xml
+++ b/lib/xmerl/doc/src/notes.xml
@@ -32,6 +32,21 @@
   <p>This document describes the changes made to the Xmerl application.</p>
 
 
+<section><title>Xmerl 1.3.16</title>
+
+    <section><title>Fixed Bugs and Malfunctions</title>
+      <list>
+        <item>
+	    <p> Removed all old unused files in the documentation.
+	    </p>
+          <p>
+	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
+        </item>
+      </list>
+    </section>
+
+</section>
+
 <section><title>Xmerl 1.3.15</title>
 
     <section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/xmerl/src/xmerl_xsd.erl b/lib/xmerl/src/xmerl_xsd.erl
index a89b3159ec..d727084175 100644
--- a/lib/xmerl/src/xmerl_xsd.erl
+++ b/lib/xmerl/src/xmerl_xsd.erl
@@ -18,7 +18,7 @@
 %% %CopyrightEnd%
 %%
 
-%% @doc Interface module for XML Schema vlidation. 
+%% @doc Interface module for XML Schema validation. 
 %% It handles the W3.org 
 %% <a href="http://www.w3.org/XML/Schema#dev">specifications</a>
 %% of XML Schema second edition 28 october 2004. For an introduction to
diff --git a/lib/xmerl/test/xmerl_SUITE_data/eventp/CMOM.xml b/lib/xmerl/test/xmerl_SUITE_data/eventp/CMOM.xml
index 7c64046897..c2533248d1 100644
--- a/lib/xmerl/test/xmerl_SUITE_data/eventp/CMOM.xml
+++ b/lib/xmerl/test/xmerl_SUITE_data/eventp/CMOM.xml
@@ -10264,7 +10264,7 @@ Note! This attribute cannot have a value larger than for 'egressAtmPcr'.</descri
         <attribute name="ingressAtmMcr">
             <description>Ingress minimum desired cell rate (cells/s).
 
-Only positive vaues allowed. This attribute is mandatory only when serviceCategory is UBR+.
+Only positive values allowed. This attribute is mandatory only when serviceCategory is UBR+.
 
 Note! When 'serviceCategory' is set to CBR or UBR this attribute has no relevance and the value submitted is ignored by the system.
 
diff --git a/lib/xmerl/test/xmerl_SUITE_data/eventp/CelloMOM.xml b/lib/xmerl/test/xmerl_SUITE_data/eventp/CelloMOM.xml
index 8f8cf54505..3b5d8ae2ad 100644
--- a/lib/xmerl/test/xmerl_SUITE_data/eventp/CelloMOM.xml
+++ b/lib/xmerl/test/xmerl_SUITE_data/eventp/CelloMOM.xml
@@ -10264,7 +10264,7 @@ Note! This attribute cannot have a value larger than for 'egressAtmPcr'.</descri
         <attribute name="ingressAtmMcr">

             <description>Ingress minimum desired cell rate (cells/s).

 

-Only positive vaues allowed. This attribute is mandatory only when serviceCategory is UBR+.

+Only positive values allowed. This attribute is mandatory only when serviceCategory is UBR+.

 

 Note! When 'serviceCategory' is set to CBR or UBR this attribute has no relevance and the value submitted is ignored by the system.

 

diff --git a/lib/xmerl/vsn.mk b/lib/xmerl/vsn.mk
index 2e9c9061d9..ddff0c8894 100644
--- a/lib/xmerl/vsn.mk
+++ b/lib/xmerl/vsn.mk
@@ -1 +1 @@
-XMERL_VSN = 1.3.15
+XMERL_VSN = 1.3.16