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-rw-r--r--lib/kernel/doc/src/code.xml42
-rw-r--r--lib/kernel/doc/src/file.xml8
-rw-r--r--lib/kernel/doc/src/gen_tcp.xml6
-rw-r--r--lib/kernel/doc/src/gen_udp.xml6
-rw-r--r--lib/kernel/doc/src/inet.xml5
-rw-r--r--lib/kernel/doc/src/rpc.xml16
-rw-r--r--lib/kernel/include/dist_util.hrl2
-rw-r--r--lib/kernel/src/code.erl160
-rw-r--r--lib/kernel/src/gen_sctp.erl2
-rw-r--r--lib/kernel/src/gen_tcp.erl2
-rw-r--r--lib/kernel/src/gen_udp.erl2
-rw-r--r--lib/kernel/src/global.erl16
-rw-r--r--lib/kernel/src/hipe_ext_format.hrl12
-rw-r--r--lib/kernel/src/hipe_unified_loader.erl11
-rw-r--r--lib/kernel/src/kernel.appup.src6
-rw-r--r--lib/kernel/src/net_kernel.erl4
-rw-r--r--lib/kernel/test/code_SUITE.erl180
17 files changed, 418 insertions, 62 deletions
diff --git a/lib/kernel/doc/src/code.xml b/lib/kernel/doc/src/code.xml
index 3143cdc825..f881fd76fd 100644
--- a/lib/kernel/doc/src/code.xml
+++ b/lib/kernel/doc/src/code.xml
@@ -899,6 +899,48 @@ rpc:call(Node, code, load_binary, [Module, Filename, Binary]),
</desc>
</func>
<func>
+ <name name="module_status" arity="1"/>
+ <fsummary>Return the status of the module in relation to object file on disk.</fsummary>
+ <desc>
+ <p>Returns:</p>
+ <taglist>
+ <tag><c>not_loaded</c></tag>
+ <item><p>If <c><anno>Module</anno></c> is not currently loaded.</p></item>
+ <tag><c>loaded</c></tag>
+ <item><p>If <c><anno>Module</anno></c> is loaded and the object file
+ exists and contains the same code.</p></item>
+ <tag><c>removed</c></tag>
+ <item><p>If <c><anno>Module</anno></c> is loaded but no
+ corresponding object file can be found in the code path.</p></item>
+ <tag><c>modified</c></tag>
+ <item><p>If <c><anno>Module</anno></c> is loaded but the object file
+ contains code with a different MD5 checksum.</p></item>
+ </taglist>
+ <p>Preloaded modules are always reported as <c>loaded</c>, without
+ inspecting the contents on disk. Cover compiled modules will always
+ be reported as <c>modified</c> if an object file exists, or as
+ <c>removed</c> otherwise. Modules whose load path is an empty string
+ (which is the convention for auto-generated code) will only be
+ reported as <c>loaded</c> or <c>not_loaded</c>.</p>
+ <p>For modules that have native code loaded (see
+ <seealso marker="#is_module_native/1"><c>is_module_native/1</c></seealso>),
+ the MD5 sum of the native code in the object file is used for the
+ comparison, if it exists; the Beam code in the file is ignored.
+ Reversely, for modules that do not currently have native code
+ loaded, any native code in the file will be ignored.</p>
+ <p>See also <seealso marker="#modified_modules/0"><c>modified_modules/0</c></seealso>.</p>
+ </desc>
+ </func>
+ <func>
+ <name name="modified_modules" arity="0"/>
+ <fsummary>Return a list of all modules modified on disk.</fsummary>
+ <desc>
+ <p>Returns the list of all currently loaded modules for which
+ <seealso marker="#module_status/1"><c>module_status/1</c></seealso>
+ returns <c>modified</c>. See also <seealso marker="#all_loaded/0"><c>all_loaded/0</c></seealso>.</p>
+ </desc>
+ </func>
+ <func>
<name name="is_module_native" arity="1"/>
<fsummary>Test if a module has native code.</fsummary>
<desc>
diff --git a/lib/kernel/doc/src/file.xml b/lib/kernel/doc/src/file.xml
index 09497482cf..b674b3ca93 100644
--- a/lib/kernel/doc/src/file.xml
+++ b/lib/kernel/doc/src/file.xml
@@ -1477,8 +1477,8 @@ f.txt: {person, "kalle", 25}.
<tag><c>16#400</c></tag>
<item><p>set group id on execution</p></item>
</taglist>
- <p>On Unix platforms, the following bits
- can also be set:</p>
+ <p>On Unix platforms, other bits than those listed above
+ may be set.</p>
</item>
<tag><c>links = integer() >= 0</c></tag>
<item>
@@ -2042,8 +2042,8 @@ f.txt: {person, "kalle", 25}.
<tag><c>16#400</c></tag>
<item><p>Set group id on execution</p></item>
</taglist>
- <p>On Unix platforms, the following bits
- can also be set.</p>
+ <p>On Unix platforms, other bits than those listed above
+ may be set.</p>
</item>
<tag><c>uid = integer() >= 0</c></tag>
<item>
diff --git a/lib/kernel/doc/src/gen_tcp.xml b/lib/kernel/doc/src/gen_tcp.xml
index 08454b9832..e97db20062 100644
--- a/lib/kernel/doc/src/gen_tcp.xml
+++ b/lib/kernel/doc/src/gen_tcp.xml
@@ -231,7 +231,11 @@ do_recv(Sock, Bs) ->
<c><anno>Socket</anno></c>. The controlling process is the process
that receives messages from the socket. If called by any other
process than the current controlling process,
- <c>{error, not_owner}</c> is returned.</p>
+ <c>{error, not_owner}</c> is returned. If the process identified
+ by <c><anno>Pid</anno></c> is not an existing local pid,
+ <c>{error, badarg}</c> is returned. <c>{error, badarg}</c> may also
+ be returned in some cases when <c><anno>Socket</anno></c> is closed
+ during the execution of this function.</p>
<p>If the socket is set in active mode, this function
will transfer any messages in the mailbox of the caller
to the new controlling process.
diff --git a/lib/kernel/doc/src/gen_udp.xml b/lib/kernel/doc/src/gen_udp.xml
index 3f88a0272d..f79566ef71 100644
--- a/lib/kernel/doc/src/gen_udp.xml
+++ b/lib/kernel/doc/src/gen_udp.xml
@@ -68,7 +68,11 @@
<c><anno>Socket</anno></c>. The controlling process is the process
that receives messages from the socket. If called by any other
process than the current controlling process,
- <c>{error, not_owner}</c> is returned.</p>
+ <c>{error, not_owner}</c> is returned. If the process identified
+ by <c><anno>Pid</anno></c> is not an existing local pid,
+ <c>{error, badarg}</c> is returned. <c>{error, badarg}</c> may also
+ be returned in some cases when <c><anno>Socket</anno></c> is closed
+ during the execution of this function.</p>
</desc>
</func>
diff --git a/lib/kernel/doc/src/inet.xml b/lib/kernel/doc/src/inet.xml
index d907cef7d3..4c4a5c39cb 100644
--- a/lib/kernel/doc/src/inet.xml
+++ b/lib/kernel/doc/src/inet.xml
@@ -987,11 +987,6 @@ setcap cap_sys_admin,cap_sys_ptrace,cap_dac_read_search+epi beam.smp</code>
<p>Sets the line delimiting character for line-oriented protocols
(<c>line</c>). Defaults to <c>$\n</c>.</p>
</item>
- <tag><c>{priority, Priority}</c></tag>
- <item>
- <p>Sets the protocol-defined priority for all packets to be sent
- on this socket.</p>
- </item>
<tag><c>{raw, Protocol, OptionNum, ValueBin}</c></tag>
<item>
<p>See below.</p>
diff --git a/lib/kernel/doc/src/rpc.xml b/lib/kernel/doc/src/rpc.xml
index 5944e9321a..adec2d9520 100644
--- a/lib/kernel/doc/src/rpc.xml
+++ b/lib/kernel/doc/src/rpc.xml
@@ -88,6 +88,12 @@
to retrieve the value of evaluating <c>apply(<anno>Module</anno>,
<anno>Function</anno>, <anno>Args</anno>)</c> on node
<c><anno>Node</anno></c>.</p>
+ <note>
+ <p><seealso marker="#yield/1"><c>yield/1</c></seealso> and
+ <seealso marker="#nb_yield/1"><c>nb_yield/1,2</c></seealso>
+ must be called by the same process from which this function
+ was made otherwise they will never yield correctly.</p>
+ </note>
</desc>
</func>
@@ -299,6 +305,11 @@
the tuple <c>{value, <anno>Val</anno>}</c> when the computation is
finished, or <c>timeout</c> when <c><anno>Timeout</anno></c>
milliseconds has elapsed.</p>
+ <note>
+ <p>This function must be called by the same process from which
+ <seealso marker="#async_call/4"><c>async_call/4</c></seealso>
+ was made otherwise it will only return <c>timeout</c>.</p>
+ </note>
</desc>
</func>
@@ -407,6 +418,11 @@
If the answer is available, it is
returned immediately. Otherwise, the calling process is
suspended until the answer arrives from <c>Node</c>.</p>
+ <note>
+ <p>This function must be called by the same process from which
+ <seealso marker="#async_call/4"><c>async_call/4</c></seealso>
+ was made otherwise it will never return.</p>
+ </note>
</desc>
</func>
</funcs>
diff --git a/lib/kernel/include/dist_util.hrl b/lib/kernel/include/dist_util.hrl
index 320e916c04..e3d2fe0eb6 100644
--- a/lib/kernel/include/dist_util.hrl
+++ b/lib/kernel/include/dist_util.hrl
@@ -29,7 +29,7 @@
-endif.
-ifdef(dist_trace).
--define(trace(Fmt,Args), io:format("~p ~p:~s",[erlang:now(),node(),lists:flatten(io_lib:format(Fmt, Args))])).
+-define(trace(Fmt,Args), io:format("~p ~p:~s",[erlang:timestamp(),node(),lists:flatten(io_lib:format(Fmt, Args))])).
% Use the one below for config-file (early boot) connection tracing
%-define(trace(Fmt,Args), erlang:display([erlang:now(),node(),lists:flatten(io_lib:format(Fmt, Args))])).
-define(trace_factor,8).
diff --git a/lib/kernel/src/code.erl b/lib/kernel/src/code.erl
index 622b27080c..5a7ca493cc 100644
--- a/lib/kernel/src/code.erl
+++ b/lib/kernel/src/code.erl
@@ -70,7 +70,9 @@
where_is_file/2,
set_primary_archive/4,
clash/0,
- get_mode/0]).
+ module_status/1,
+ modified_modules/0,
+ get_mode/0]).
-deprecated({rehash,0,next_major_release}).
@@ -719,38 +721,14 @@ start_get_mode() ->
which(Module) when is_atom(Module) ->
case is_loaded(Module) of
false ->
- which2(Module);
+ which(Module, get_path());
{file, File} ->
File
end.
-which2(Module) ->
- Base = atom_to_list(Module),
- File = filename:basename(Base) ++ objfile_extension(),
- Path = get_path(),
- which(File, filename:dirname(Base), Path).
-
--spec which(file:filename(), file:filename(), [file:filename()]) ->
- 'non_existing' | file:filename().
-
-which(_, _, []) ->
- non_existing;
-which(File, Base, [Directory|Tail]) ->
- Path = if
- Base =:= "." -> Directory;
- true -> filename:join(Directory, Base)
- end,
- case erl_prim_loader:list_dir(Path) of
- {ok,Files} ->
- case lists:member(File,Files) of
- true ->
- filename:append(Path, File);
- false ->
- which(File, Base, Tail)
- end;
- _Error ->
- which(File, Base, Tail)
- end.
+which(Module, Path) when is_atom(Module) ->
+ File = atom_to_list(Module) ++ objfile_extension(),
+ where_is_file(Path, File).
%% Search the code path for a specific file. Try to locate
%% it in the code path cache if possible.
@@ -760,13 +738,33 @@ which(File, Base, [Directory|Tail]) ->
Absname :: file:filename().
where_is_file(File) when is_list(File) ->
Path = get_path(),
- which(File, ".", Path).
+ where_is_file(Path, File).
+
+%% To avoid unnecessary work when looking at many modules, this also
+%% accepts pairs of directories and pre-fetched contents in the path
+-spec where_is_file(Path :: [Dir|{Dir,Files}], Filename :: file:filename()) ->
+ 'non_existing' | file:filename() when
+ Dir :: file:filename(), Files :: [file:filename()].
--spec where_is_file(Path :: file:filename(), Filename :: file:filename()) ->
- file:filename() | 'non_existing'.
+where_is_file([], _) ->
+ non_existing;
+where_is_file([{Path, Files}|Tail], File) ->
+ where_is_file(Tail, File, Path, Files);
+where_is_file([Path|Tail], File) ->
+ case erl_prim_loader:list_dir(Path) of
+ {ok,Files} ->
+ where_is_file(Tail, File, Path, Files);
+ _Error ->
+ where_is_file(Tail, File)
+ end.
-where_is_file(Path, File) when is_list(Path), is_list(File) ->
- which(File, ".", Path).
+where_is_file(Tail, File, Path, Files) ->
+ case lists:member(File, Files) of
+ true ->
+ filename:append(Path, File);
+ false ->
+ where_is_file(Tail, File)
+ end.
-spec set_primary_archive(ArchiveFile :: file:filename(),
ArchiveBin :: binary(),
@@ -899,3 +897,97 @@ load_all_native_1([{Mod,BeamFilename}|T], ChunkTag) ->
load_all_native_1(T, ChunkTag);
load_all_native_1([], _) ->
ok.
+
+%% Returns the status of the module in relation to object file on disk.
+-spec module_status(Module :: module()) -> not_loaded | loaded | modified | removed.
+module_status(Module) ->
+ module_status(Module, code:get_path()).
+
+%% Note that we don't want to go via which/1, since it doesn't look at the
+%% disk contents at all if the module is already loaded.
+module_status(Module, PathFiles) ->
+ case code:is_loaded(Module) of
+ false -> not_loaded;
+ {file, preloaded} -> loaded;
+ {file, cover_compiled} ->
+ %% cover compilation loads directly to memory and does not
+ %% create a beam file, so report 'modified' if a file exists
+ case which(Module, PathFiles) of
+ non_existing -> removed;
+ _File -> modified
+ end;
+ {file, []} -> loaded; % no beam file - generated code
+ {file, OldFile} when is_list(OldFile) ->
+ %% we don't care whether or not the file is in the same location
+ %% as when last loaded, as long as it can be found in the path
+ case which(Module, PathFiles) of
+ non_existing -> removed;
+ Path ->
+ case module_changed_on_disk(Module, Path) of
+ true -> modified;
+ false -> loaded
+ end
+ end
+ end.
+
+%% Detects actual code changes only, e.g. to decide whether a module should
+%% be reloaded; does not care about file timestamps or compilation time
+module_changed_on_disk(Module, Path) ->
+ MD5 = erlang:get_module_info(Module, md5),
+ case erlang:system_info(hipe_architecture) of
+ undefined ->
+ %% straightforward, since native is not supported
+ MD5 =/= beam_file_md5(Path);
+ Architecture ->
+ case code:is_module_native(Module) of
+ true ->
+ %% MD5 is for native code, so we check only the native
+ %% code on disk, ignoring the beam code
+ MD5 =/= beam_file_native_md5(Path, Architecture);
+ _ ->
+ %% MD5 is for beam code, so check only the beam code on
+ %% disk, even if the file contains native code as well
+ MD5 =/= beam_file_md5(Path)
+ end
+ end.
+
+beam_file_md5(Path) ->
+ case beam_lib:md5(Path) of
+ {ok,{_Mod,MD5}} -> MD5;
+ _ -> undefined
+ end.
+
+beam_file_native_md5(Path, Architecture) ->
+ try
+ get_beam_chunk(Path, hipe_unified_loader:chunk_name(Architecture))
+ of
+ NativeCode when is_binary(NativeCode) ->
+ erlang:md5(NativeCode)
+ catch
+ _:_ -> undefined
+ end.
+
+get_beam_chunk(Path, Chunk) ->
+ {ok, {_, [{_, Bin}]}} = beam_lib:chunks(Path, [Chunk]),
+ Bin.
+
+%% Returns a list of all modules modified on disk.
+-spec modified_modules() -> [module()].
+modified_modules() ->
+ PathFiles = path_files(),
+ [M || {M, _} <- code:all_loaded(),
+ module_status(M, PathFiles) =:= modified].
+
+%% prefetch the directory contents of code path directories
+path_files() ->
+ path_files(code:get_path()).
+
+path_files([]) ->
+ [];
+path_files([Path|Tail]) ->
+ case erl_prim_loader:list_dir(Path) of
+ {ok, Files} ->
+ [{Path,Files} | path_files(Tail)];
+ _Error ->
+ path_files(Tail)
+ end.
diff --git a/lib/kernel/src/gen_sctp.erl b/lib/kernel/src/gen_sctp.erl
index b133e6fed4..a6aa0edd15 100644
--- a/lib/kernel/src/gen_sctp.erl
+++ b/lib/kernel/src/gen_sctp.erl
@@ -439,7 +439,7 @@ error_string(X) ->
-spec controlling_process(Socket, Pid) -> ok | {error, Reason} when
Socket :: sctp_socket(),
Pid :: pid(),
- Reason :: closed | not_owner | inet:posix().
+ Reason :: closed | not_owner | badarg | inet:posix().
controlling_process(S, Pid) when is_port(S), is_pid(Pid) ->
inet:udp_controlling_process(S, Pid);
diff --git a/lib/kernel/src/gen_tcp.erl b/lib/kernel/src/gen_tcp.erl
index 1a21541b7c..ac61dbc792 100644
--- a/lib/kernel/src/gen_tcp.erl
+++ b/lib/kernel/src/gen_tcp.erl
@@ -320,7 +320,7 @@ unrecv(S, Data) when is_port(S) ->
-spec controlling_process(Socket, Pid) -> ok | {error, Reason} when
Socket :: socket(),
Pid :: pid(),
- Reason :: closed | not_owner | inet:posix().
+ Reason :: closed | not_owner | badarg | inet:posix().
controlling_process(S, NewOwner) ->
case inet_db:lookup_socket(S) of
diff --git a/lib/kernel/src/gen_udp.erl b/lib/kernel/src/gen_udp.erl
index 98d2f0bcfb..3121544719 100644
--- a/lib/kernel/src/gen_udp.erl
+++ b/lib/kernel/src/gen_udp.erl
@@ -195,7 +195,7 @@ connect(S, Address, Port) when is_port(S) ->
-spec controlling_process(Socket, Pid) -> ok | {error, Reason} when
Socket :: socket(),
Pid :: pid(),
- Reason :: closed | not_owner | inet:posix().
+ Reason :: closed | not_owner | badarg | inet:posix().
controlling_process(S, NewOwner) ->
inet:udp_controlling_process(S, NewOwner).
diff --git a/lib/kernel/src/global.erl b/lib/kernel/src/global.erl
index 0c73ead7c5..5e8bc2ba5d 100644
--- a/lib/kernel/src/global.erl
+++ b/lib/kernel/src/global.erl
@@ -58,14 +58,18 @@
%%% In certain places in the server, calling io:format hangs everything,
%%% so we'd better use erlang:display/1.
%%% my_tracer is used in testsuites
--define(trace(_), ok).
+%% uncomment this if tracing is wanted
+%%-define(DEBUG, true).
+-ifdef(DEBUG).
+-define(trace(T), erlang:display({format, node(), cs(), T})).
+ cs() ->
+ {_Big, Small, Tiny} = erlang:timestamp(),
+ (Small rem 100) * 100 + (Tiny div 10000).
%-define(trace(T), (catch my_tracer ! {node(), {line,?LINE}, T})).
-
-%-define(trace(T), erlang:display({format, node(), cs(), T})).
-%cs() ->
-% {_Big, Small, Tiny} = now(),
-% (Small rem 100) * 100 + (Tiny div 10000).
+-else.
+-define(trace(_), ok).
+-endif.
%% These are the protocol versions:
%% Vsn 1 is the original protocol.
diff --git a/lib/kernel/src/hipe_ext_format.hrl b/lib/kernel/src/hipe_ext_format.hrl
index 102cb49a2b..05c678fdec 100644
--- a/lib/kernel/src/hipe_ext_format.hrl
+++ b/lib/kernel/src/hipe_ext_format.hrl
@@ -1,3 +1,15 @@
+%% 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.
+
%% hipe_x86_ext_format.hrl
%% Definitions for unified external object format
%% Currently: sparc, x86, amd64
diff --git a/lib/kernel/src/hipe_unified_loader.erl b/lib/kernel/src/hipe_unified_loader.erl
index 04ec1479cb..f4c7c277ed 100644
--- a/lib/kernel/src/hipe_unified_loader.erl
+++ b/lib/kernel/src/hipe_unified_loader.erl
@@ -1,4 +1,15 @@
%% -*- 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.
%% =======================================================================
%% Filename : hipe_unified_loader.erl
%% Module : hipe_unified_loader
diff --git a/lib/kernel/src/kernel.appup.src b/lib/kernel/src/kernel.appup.src
index 82cf73cbda..b505524471 100644
--- a/lib/kernel/src/kernel.appup.src
+++ b/lib/kernel/src/kernel.appup.src
@@ -18,9 +18,7 @@
%% %CopyrightEnd%
{"%VSN%",
%% Up from - max one major revision back
- [{<<"5\\.[0-1](\\.[0-9]+)*">>,[restart_new_emulator]}, % OTP-19.*
- {<<"4\\.[0-2](\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-18.*
+ [{<<"5\\.[0-1](\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-19.*
%% Down to - max one major revision back
- [{<<"5\\.[0-1](\\.[0-9]+)*">>,[restart_new_emulator]}, % OTP-19.*
- {<<"4\\.[0-2](\\.[0-9]+)*">>,[restart_new_emulator]}] % OTP-18.*
+ [{<<"5\\.[0-1](\\.[0-9]+)*">>,[restart_new_emulator]}] % OTP-19.*
}.
diff --git a/lib/kernel/src/net_kernel.erl b/lib/kernel/src/net_kernel.erl
index 0c679e7349..0a9f9316b0 100644
--- a/lib/kernel/src/net_kernel.erl
+++ b/lib/kernel/src/net_kernel.erl
@@ -26,15 +26,13 @@
%%-define(dist_debug, true).
-%-define(DBG,erlang:display([?MODULE,?LINE])).
-
-ifdef(dist_debug).
-define(debug(Term), erlang:display(Term)).
-else.
-define(debug(Term), ok).
-endif.
--ifdef(DEBUG).
+-ifdef(dist_debug).
-define(connect_failure(Node,Term),
io:format("Net Kernel 2: Failed connection to node ~p, reason ~p~n",
[Node,Term])).
diff --git a/lib/kernel/test/code_SUITE.erl b/lib/kernel/test/code_SUITE.erl
index 29b3f7caaf..4914ce9e4c 100644
--- a/lib/kernel/test/code_SUITE.erl
+++ b/lib/kernel/test/code_SUITE.erl
@@ -38,6 +38,7 @@
on_load_purge/1, on_load_self_call/1, on_load_pending/1,
on_load_deleted/1,
big_boot_embedded/1,
+ module_status/1,
native_early_modules/1, get_mode/1,
normalized_paths/1]).
@@ -68,6 +69,7 @@ all() ->
on_load_binary, on_load_embedded, on_load_errors, on_load_update,
on_load_purge, on_load_self_call, on_load_pending,
on_load_deleted,
+ module_status,
big_boot_embedded, native_early_modules, get_mode, normalized_paths].
groups() ->
@@ -93,6 +95,11 @@ init_per_suite(Config) ->
end_per_suite(Config) ->
Config.
+-define(TESTMOD, test_dummy).
+-define(TESTMODSTR, "test_dummy").
+-define(TESTMODSRC, ?TESTMODSTR ".erl").
+-define(TESTMODOBJ, ?TESTMODSTR ".beam").
+
init_per_testcase(big_boot_embedded, Config) ->
case catch crypto:start() of
ok ->
@@ -104,6 +111,13 @@ init_per_testcase(_Func, Config) ->
P = code:get_path(),
[{code_path, P}|Config].
+end_per_testcase(module_status, Config) ->
+ code:purge(?TESTMOD),
+ code:delete(?TESTMOD),
+ code:purge(?TESTMOD),
+ file:delete(?TESTMODOBJ),
+ file:delete(?TESTMODSRC),
+ end_per_testcase(Config);
end_per_testcase(TC, Config) when TC == mult_lib_roots;
TC == big_boot_embedded ->
{ok, HostName} = inet:gethostname(),
@@ -1757,6 +1771,172 @@ do_normalized_paths([M|Ms]) ->
do_normalized_paths([]) ->
ok.
+%% Test that module_status/1 behaves as expected
+module_status(_Config) ->
+ %% basics
+ not_loaded = code:module_status(fubar), % nonexisting
+ {file, preloaded} = code:is_loaded(erlang),
+ loaded = code:module_status(erlang), % preloaded
+ loaded = code:module_status(?MODULE), % normal known loaded
+
+ non_existing = code:which(?TESTMOD), % verify dummy name not in path
+ code:purge(?TESTMOD), % ensure no previous version in memory
+ code:delete(?TESTMOD),
+ code:purge(?TESTMOD),
+
+ %% generated code is detected as such
+ {ok,?TESTMOD,Bin} = compile:forms(dummy_ast(), []),
+ {module,?TESTMOD} = code:load_binary(?TESTMOD,"",Bin), % no source file
+ ok = ?TESTMOD:f(),
+ "" = code:which(?TESTMOD), % verify empty string for source file
+ loaded = code:module_status(?TESTMOD),
+
+ %% deleting generated code
+ true = code:delete(?TESTMOD),
+ non_existing = code:which(?TESTMOD), % verify still not in path
+ not_loaded = code:module_status(?TESTMOD),
+
+ %% beam file exists but not loaded
+ make_source_file(<<"0">>),
+ compile_beam(0),
+ true = (non_existing =/= code:which(?TESTMOD)), % verify in path
+ not_loaded = code:module_status(?TESTMOD),
+
+ %% loading code from disk makes it loaded
+ load_code(),
+ loaded = code:module_status(?TESTMOD), % loaded
+
+ %% cover compiling a module
+ {ok,?TESTMOD} = cover:compile(?TESTMOD),
+ {file, cover_compiled} = code:is_loaded(?TESTMOD), % verify cover compiled
+ modified = code:module_status(?TESTMOD), % loaded cover code but file exists
+ remove_code(),
+ removed = code:module_status(?TESTMOD), % removed
+ compile_beam(0),
+ modified = code:module_status(?TESTMOD), % recreated
+ load_code(),
+ loaded = code:module_status(?TESTMOD), % loading removes cover status
+ code:purge(?TESTMOD),
+ true = code:delete(?TESTMOD),
+ not_loaded = code:module_status(?TESTMOD), % deleted
+
+ %% recompilation ignores timestamps, only md5 matters
+ load_code(),
+ compile_beam(1100),
+ loaded = code:module_status(?TESTMOD),
+
+ %% modifying module detects different md5
+ make_source_file(<<"1">>),
+ compile_beam(0),
+ modified = code:module_status(?TESTMOD),
+
+ %% loading the modified code from disk makes it loaded
+ load_code(),
+ loaded = code:module_status(?TESTMOD),
+
+ %% removing and recreating a module with same md5
+ remove_code(),
+ removed = code:module_status(?TESTMOD),
+ compile_beam(0),
+ loaded = code:module_status(?TESTMOD),
+
+ case erlang:system_info(hipe_architecture) of
+ undefined ->
+ %% no native support
+ ok;
+ _ ->
+ %% native chunk is ignored if beam code is already loaded
+ load_code(),
+ loaded = code:module_status(?TESTMOD),
+ false = has_native(?TESTMOD),
+ compile_native(0),
+ BeamMD5 = erlang:get_module_info(?TESTMOD, md5),
+ {ok,{?TESTMOD,BeamMD5}} = beam_lib:md5(?TESTMODOBJ), % beam md5 unchanged
+ loaded = code:module_status(?TESTMOD),
+
+ %% native code reported as loaded, though different md5 from beam
+ load_code(),
+ true = has_native(?TESTMOD),
+ NativeMD5 = erlang:get_module_info(?TESTMOD, md5),
+ true = (BeamMD5 =/= NativeMD5),
+ loaded = code:module_status(?TESTMOD),
+
+ %% recompilation ignores timestamps, only md5 matters
+ compile_native(1100), % later timestamp
+ loaded = code:module_status(?TESTMOD),
+
+ %% modifying native module detects different md5
+ make_source_file(<<"2">>),
+ compile_native(0),
+ modified = code:module_status(?TESTMOD),
+
+ %% loading the modified native code from disk makes it loaded
+ load_code(),
+ true = has_native(?TESTMOD),
+ NativeMD5_2 = erlang:get_module_info(?TESTMOD, md5),
+ true = (NativeMD5 =/= NativeMD5_2), % verify native md5 changed
+ {ok,{?TESTMOD,BeamMD5_2}} = beam_lib:md5(?TESTMODOBJ),
+ true = (BeamMD5_2 =/= NativeMD5_2), % verify md5 differs from beam
+ loaded = code:module_status(?TESTMOD),
+
+ %% removing and recreating a native module with same md5
+ remove_code(),
+ removed = code:module_status(?TESTMOD),
+ compile_native(0),
+ loaded = code:module_status(?TESTMOD),
+
+ %% purging/deleting native module
+ code:purge(?TESTMOD),
+ true = code:delete(?TESTMOD),
+ not_loaded = code:module_status(?TESTMOD)
+ end,
+ ok.
+
+compile_beam(Sleep) ->
+ compile(Sleep, []).
+
+compile_native(Sleep) ->
+ compile(Sleep, [native]).
+
+compile(Sleep, Opts) ->
+ timer:sleep(Sleep), % increment compilation timestamp
+ {ok,?TESTMOD} = compile:file(?TESTMODSRC, Opts).
+
+load_code() ->
+ code:purge(?TESTMOD),
+ {module,?TESTMOD} = code:load_file(?TESTMOD).
+
+remove_code() ->
+ ok = file:delete(?TESTMODOBJ).
+
+has_native(Module) ->
+ case erlang:get_module_info(Module, native_addresses) of
+ [] -> false;
+ [_|_] -> true
+ end.
+
+make_source_file(Body) ->
+ ok = file:write_file(?TESTMODSRC, dummy_source(Body)).
+
+dummy_source(Body) ->
+ [<<"-module(" ?TESTMODSTR ").\n"
+ "-export([f/0]).\n"
+ "f() -> ">>, Body, <<".\n">>].
+
+dummy_ast() ->
+ dummy_ast(?TESTMODSTR).
+
+dummy_ast(Mod) when is_atom(Mod) ->
+ dummy_ast(atom_to_list(Mod));
+dummy_ast(ModStr) ->
+ [scan_form("-module(" ++ ModStr ++ ")."),
+ scan_form("-export([f/0])."),
+ scan_form("f() -> ok.")].
+
+scan_form(String) ->
+ {ok,Ts,_} = erl_scan:string(String),
+ {ok,F} = erl_parse:parse_form(Ts),
+ F.
%%-----------------------------------------------------------------
%% error_logger handler.
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-09 12:54:27 +0000