diff options
31 files changed, 316 insertions, 201 deletions
diff --git a/erts/doc/src/erl_nif.xml b/erts/doc/src/erl_nif.xml index f88d255296..d74ae23a93 100644 --- a/erts/doc/src/erl_nif.xml +++ b/erts/doc/src/erl_nif.xml @@ -1495,6 +1495,9 @@ enif_free_iovec(iovec);]]></code> <c>term</c>.</p> <p>Returns <c>true</c> on success, or <c>false</c> if <c>term</c> is not a handle to a resource object of type <c>type</c>.</p> + <p><c>enif_get_resource</c> does not add a reference to the resource + object. However, the pointer received in <c>*objp</c> is guaranteed to + be valid at least as long as the resource handle <c>term</c> is valid.</p> </desc> </func> @@ -2947,6 +2950,10 @@ enif_map_iterator_destroy(env, &iter);</code> References made by <seealso marker="#enif_make_resource"> <c>enif_make_resource</c></seealso> can only be removed by the garbage collector.</p> + <p>There are no guarantees exactly when the destructor of an + unreferenced resource is called. It could be called directly by + <c>enif_release_resource</c> but it could also be scheduled to be + called at a later time possibly by another thread.</p> </desc> </func> diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index 68cde567c2..f41ed87048 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -9413,6 +9413,18 @@ Metadata = #{ pid => pid(), <p>Returns the previous system monitor settings just like <seealso marker="#system_monitor/0"> <c>erlang:system_monitor/0</c></seealso>.</p> + <p>The arguments to <c>system_monitor/2</c> specifies how all + system monitoring on the node should be done, not how it should be + changed. This means only one process at a time + (<c><anno>MonitorPid</anno></c>) can be the receiver of system monitor + messages. Also, the way to clear a specific monitor option + is to not include it in the list <c><anno>Options</anno></c>. All + system monitoring will, however, be cleared if the process identified by + <c><anno>MonitorPid</anno></c> terminates.</p> + <p>There are no special option values (like zero) to clear an option. + Some of the options have a unspecified minimum value. Lower values + will be adjusted to the minimum value. For example, it is currently not + possible to monitor all garbage collections with <c>{long_gc, 0}</c>.</p> <note> <p>If a monitoring process gets so large that it itself starts to cause system monitor messages when garbage diff --git a/erts/emulator/nifs/common/socket_nif.c b/erts/emulator/nifs/common/socket_nif.c index 1298ae4dba..e71c786d3e 100644 --- a/erts/emulator/nifs/common/socket_nif.c +++ b/erts/emulator/nifs/common/socket_nif.c @@ -4004,7 +4004,7 @@ ERL_NIF_TERM nsupports_options_tcp(ErlNifEnv* env) /* *** SOCKET_OPT_TCP_MAXSEG => TCP_MAXSEG *** */ -#if defined(TCP_) +#if defined(TCP_MAXSEG) tmp = MKT2(env, esock_atom_maxseg, esock_atom_true); #else tmp = MKT2(env, esock_atom_maxseg, esock_atom_false); @@ -4018,7 +4018,7 @@ ERL_NIF_TERM nsupports_options_tcp(ErlNifEnv* env) /* *** SOCKET_OPT_TCP_NODELAY => TCP_NODELAY *** */ -#if defined(TCP_) +#if defined(TCP_NODELAY) tmp = MKT2(env, esock_atom_nodelay, esock_atom_true); #else tmp = MKT2(env, esock_atom_nodelay, esock_atom_false); diff --git a/lib/compiler/src/beam_ssa_pre_codegen.erl b/lib/compiler/src/beam_ssa_pre_codegen.erl index bf99e8fc26..9af72afca7 100644 --- a/lib/compiler/src/beam_ssa_pre_codegen.erl +++ b/lib/compiler/src/beam_ssa_pre_codegen.erl @@ -1415,12 +1415,15 @@ fix_receive([], _Defs, Blocks, Count) -> find_loop_exit([L1,L2|_Ls], Blocks) -> Path1 = beam_ssa:rpo([L1], Blocks), Path2 = beam_ssa:rpo([L2], Blocks), - find_loop_exit_1(reverse(Path1), reverse(Path2), none); + find_loop_exit_1(Path1, cerl_sets:from_list(Path2)); find_loop_exit(_, _) -> none. -find_loop_exit_1([H|T1], [H|T2], _) -> - find_loop_exit_1(T1, T2, H); -find_loop_exit_1(_, _, Exit) -> Exit. +find_loop_exit_1([H|T], OtherPath) -> + case cerl_sets:is_element(H, OtherPath) of + true -> H; + false -> find_loop_exit_1(T, OtherPath) + end; +find_loop_exit_1([], _) -> none. %% find_rm_blocks(StartLabel, Blocks) -> [Label]. %% Find all blocks that start with remove_message within the receive diff --git a/lib/compiler/src/beam_ssa_type.erl b/lib/compiler/src/beam_ssa_type.erl index 06b42f1928..2ea7e89dfa 100644 --- a/lib/compiler/src/beam_ssa_type.erl +++ b/lib/compiler/src/beam_ssa_type.erl @@ -24,7 +24,7 @@ -include("beam_ssa_opt.hrl"). -import(lists, [all/2,any/2,droplast/1,foldl/3,last/1,member/2, keyfind/3,partition/2,reverse/1,reverse/2, - seq/2,sort/1,split/2]). + sort/1,split/2]). -define(UNICODE_INT, #t_integer{elements={0,16#10FFFF}}). @@ -874,11 +874,11 @@ type(call, [#b_remote{mod=#b_literal{val=Mod}, true -> none end; - {#t_integer{elements={Min,Max}}, + {#t_integer{elements={Min,_}}=IntType, #t_tuple{elements=Es0,size=Size}=T} -> - %% We know this will land between Min and Max, so kill the - %% types for those indexes. - Es = maps:without(seq(Min, Max), Es0), + %% Remove type information for all indices that + %% falls into the range of the integer. + Es = remove_element_info(IntType, Es0), case T#t_tuple.exact of false -> T#t_tuple{elements=Es,size=max(Min, Size)}; @@ -1649,6 +1649,12 @@ get_literal_from_type(nil) -> #b_literal{val=[]}; get_literal_from_type(_) -> none. +remove_element_info(#t_integer{elements={Min,Max}}, Es) -> + foldl(fun(El, Acc) when Min =< El, El =< Max -> + maps:remove(El, Acc); + (_El, Acc) -> Acc + end, Es, maps:keys(Es)). + t_atom() -> #t_atom{elements=any}. diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 3699c9d22e..007a0247f4 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -1811,7 +1811,8 @@ force_safe(Ce, St0) -> is_safe(#c_cons{}) -> true; is_safe(#c_tuple{}) -> true; -is_safe(#c_var{}) -> true; +is_safe(#c_var{name={_,_}}) -> false; %Fun. Not safe. +is_safe(#c_var{name=_}) -> true; %Ordinary variable. is_safe(#c_literal{}) -> true; is_safe(_) -> false. diff --git a/lib/compiler/test/beam_type_SUITE.erl b/lib/compiler/test/beam_type_SUITE.erl index 882e281a44..0d1680fb15 100644 --- a/lib/compiler/test/beam_type_SUITE.erl +++ b/lib/compiler/test/beam_type_SUITE.erl @@ -271,8 +271,22 @@ setelement(_Config) -> T0 = id({a,42}), {a,_} = T0, {b,_} = setelement(1, T0, b), + {z,b} = do_setelement_1(<<(id(1)):32>>, {a,b}, z), + {new,two} = do_setelement_2(<<(id(1)):1>>, {one,two}, new), ok. +do_setelement_1(<<N:32>>, Tuple, NewValue) -> + _ = element(N, Tuple), + %% While updating the type for Tuple, beam_ssa_type would do: + %% maps:without(lists:seq(0, 4294967295), Elements) + setelement(N, Tuple, NewValue). + +do_setelement_2(<<N:1>>, Tuple, NewValue) -> + %% Cover the second clause in remove_element_info/2. The + %% type for the second element will be kept. + two = element(2, Tuple), + setelement(N, Tuple, NewValue). + cons(_Config) -> [did] = cons(assigned, did), diff --git a/lib/compiler/test/fun_SUITE.erl b/lib/compiler/test/fun_SUITE.erl index 1df0a05275..7fc6195e31 100644 --- a/lib/compiler/test/fun_SUITE.erl +++ b/lib/compiler/test/fun_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, test1/1,overwritten_fun/1,otp_7202/1,bif_fun/1, - external/1,eep37/1,eep37_dup/1,badarity/1,badfun/1]). + external/1,eep37/1,eep37_dup/1,badarity/1,badfun/1, + duplicated_fun/1]). %% Internal exports. -export([call_me/1,dup1/0,dup2/0]). @@ -37,7 +38,7 @@ all() -> groups() -> [{p,[parallel], [test1,overwritten_fun,otp_7202,bif_fun,external,eep37, - eep37_dup,badarity,badfun]}]. + eep37_dup,badarity,badfun,duplicated_fun]}]. init_per_suite(Config) -> test_lib:recompile(?MODULE), @@ -261,5 +262,20 @@ badfun(_Config) -> expect_badfun(Term, Exit) -> {'EXIT',{{badfun,Term},_}} = Exit. +duplicated_fun(_Config) -> + try + %% The following code used to crash the compiler before + %% v3_core:is_safe/1 was corrected to consider fun variables + %% unsafe. + id([print_result_paths_fun = fun duplicated_fun_helper/1]), + ct:error(should_fail) + catch + error:{badmatch,F} when is_function(F, 1) -> + ok + end. + +duplicated_fun_helper(_) -> + ok. + id(I) -> I. diff --git a/lib/compiler/test/receive_SUITE.erl b/lib/compiler/test/receive_SUITE.erl index 0038eb1a4b..752491f0f8 100644 --- a/lib/compiler/test/receive_SUITE.erl +++ b/lib/compiler/test/receive_SUITE.erl @@ -26,7 +26,7 @@ init_per_testcase/2,end_per_testcase/2, export/1,recv/1,coverage/1,otp_7980/1,ref_opt/1, wait/1,recv_in_try/1,double_recv/1,receive_var_zero/1, - match_built_terms/1]). + match_built_terms/1,elusive_common_exit/1]). -include_lib("common_test/include/ct.hrl"). @@ -47,7 +47,7 @@ groups() -> [{p,test_lib:parallel(), [recv,coverage,otp_7980,ref_opt,export,wait, recv_in_try,double_recv,receive_var_zero, - match_built_terms]}]. + match_built_terms,elusive_common_exit]}]. init_per_suite(Config) -> @@ -427,4 +427,26 @@ match_built_terms(Config) when is_list(Config) -> ?MATCH_BUILT_TERM(Ref, <<A, B>>), ?MATCH_BUILT_TERM(Ref, #{ 1 => A, 2 => B}). +elusive_common_exit(_Config) -> + self() ! {1, a}, + self() ! {2, b}, + {[z], [{2,b},{1,a}]} = elusive_loop([x,y,z], 2, []), + ok. + +elusive_loop(List, 0, Results) -> + {List, Results}; +elusive_loop(List, ToReceive, Results) -> + {Result, RemList} = + receive + {_Pos, _R} = Res when List =/= [] -> + [_H|T] = List, + {Res, T}; + {_Pos, _R} = Res when List =:= [] -> + {Res, []} + end, + %% beam_ssa_pre_codegen:fix_receives() would fail to find + %% the common exit block for this receive. That would mean + %% that it would not insert all necessary copy instructions. + elusive_loop(RemList, ToReceive-1, [Result | Results]). + id(I) -> I. diff --git a/lib/crypto/c_src/cipher.c b/lib/crypto/c_src/cipher.c index 00072af632..0532fb7566 100644 --- a/lib/crypto/c_src/cipher.c +++ b/lib/crypto/c_src/cipher.c @@ -334,6 +334,7 @@ ERL_NIF_TERM cipher_types_as_list(ErlNifEnv* env) continue; if ((p->cipher.p != NULL) || + (p->flags & AES_CTR_COMPAT) || (p->type.atom == atom_aes_ige256)) /* Special handling. Bad indeed... */ { hd = enif_make_list_cell(env, p->type.atom, hd); diff --git a/lib/snmp/src/agent/snmp_community_mib.erl b/lib/snmp/src/agent/snmp_community_mib.erl index 9fd7b30f9f..984b0bcee1 100644 --- a/lib/snmp/src/agent/snmp_community_mib.erl +++ b/lib/snmp/src/agent/snmp_community_mib.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1999-2016. All Rights Reserved. +%% Copyright Ericsson AB 1999-2019. 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. @@ -206,10 +206,10 @@ do_add_community(Community) -> {error, create_failed} end catch - {error, Reason} -> - {error, Reason}; - Class:Reason -> - {error, {Class, Reason, erlang:get_stacktrace()}} + throw:{error, _} = ERROR -> + ERROR; + C:E:S -> + {error, {C, E, S}} end. %% FIXME: does not work with mnesia diff --git a/lib/snmp/src/agent/snmp_generic.erl b/lib/snmp/src/agent/snmp_generic.erl index e67a1b3c80..26a0dd0648 100644 --- a/lib/snmp/src/agent/snmp_generic.erl +++ b/lib/snmp/src/agent/snmp_generic.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2017. All Rights Reserved. +%% Copyright Ericsson AB 1996-2019. 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. @@ -421,12 +421,12 @@ table_check_status(NameDb, Col, ?'RowStatus_createAndGo', RowIndex, Cols) -> _Found -> {inconsistentValue, Col} end catch - _:_Reason -> + _:_E:_S -> ?vtrace( "failed construct row (createAndGo): " - " n Reason: ~p" - " n Stack: ~p", - [_Reason, erlang:get_stacktrace()]), + " n Error: ~p" + " n Stack: ~p", + [_E, _S]), {noCreation, Col} % Bad RowIndex end; true -> {inconsistentValue, Col} @@ -441,12 +441,12 @@ table_check_status(NameDb, Col, ?'RowStatus_createAndWait', RowIndex, Cols) -> _Row -> {noError, 0} catch - _:_Reason -> + _:_E:_S -> ?vtrace( "failed construct row (createAndWait): " - " n Reason: ~p" - " n Stack: ~p", - [_Reason, erlang:get_stacktrace()]), + " n Error: ~p" + " n Stack: ~p", + [_E, _S]), {noCreation, Col} % Bad RowIndex end; true -> {inconsistentValue, Col} diff --git a/lib/snmp/src/agent/snmp_standard_mib.erl b/lib/snmp/src/agent/snmp_standard_mib.erl index bfe471178d..679d2657c6 100644 --- a/lib/snmp/src/agent/snmp_standard_mib.erl +++ b/lib/snmp/src/agent/snmp_standard_mib.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2015. All Rights Reserved. +%% Copyright Ericsson AB 1996-2019. 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. @@ -27,6 +27,7 @@ -include("snmp_types.hrl"). -include("STANDARD-MIB.hrl"). +-include("snmpa_internal.hrl"). -define(VMODULE,"STANDARD-MIB"). -include("snmp_verbosity.hrl"). @@ -547,10 +548,12 @@ dummy(_Op) -> ok. %%----------------------------------------------------------------- snmp_set_serial_no(new) -> snmp_generic:variable_func(new, {snmpSetSerialNo, volatile}), - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - Val = random:uniform(2147483648) - 1, + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), + Val = rand:uniform(2147483648) - 1, snmp_generic:variable_func(set, Val, {snmpSetSerialNo, volatile}); snmp_set_serial_no(delete) -> diff --git a/lib/snmp/src/agent/snmp_target_mib.erl b/lib/snmp/src/agent/snmp_target_mib.erl index e65fa7f340..22fd3acb84 100644 --- a/lib/snmp/src/agent/snmp_target_mib.erl +++ b/lib/snmp/src/agent/snmp_target_mib.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1998-2015. All Rights Reserved. +%% Copyright Ericsson AB 1998-2019. 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. @@ -42,6 +42,7 @@ -define(VMODULE,"TARGET-MIB"). -include("snmp_verbosity.hrl"). +-include("snmpa_internal.hrl"). %% Column not accessible via SNMP - needed when the agent sends informs @@ -673,10 +674,12 @@ snmpTargetSpinLock(print) -> snmpTargetSpinLock(new) -> snmp_generic:variable_func(new, {snmpTargetSpinLock, volatile}), - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - Val = random:uniform(2147483648) - 1, + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), + Val = rand:uniform(2147483648) - 1, snmp_generic:variable_func(set, Val, {snmpTargetSpinLock, volatile}); snmpTargetSpinLock(delete) -> diff --git a/lib/snmp/src/agent/snmp_user_based_sm_mib.erl b/lib/snmp/src/agent/snmp_user_based_sm_mib.erl index f6e4fd3951..4842669fa4 100644 --- a/lib/snmp/src/agent/snmp_user_based_sm_mib.erl +++ b/lib/snmp/src/agent/snmp_user_based_sm_mib.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1999-2015. All Rights Reserved. +%% Copyright Ericsson AB 1999-2019. 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. @@ -440,10 +440,12 @@ usmUserSpinLock(print) -> usmUserSpinLock(new) -> snmp_generic:variable_func(new, {usmUserSpinLock, volatile}), - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - Val = random:uniform(2147483648) - 1, + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), + Val = rand:uniform(2147483648) - 1, snmp_generic:variable_func(set, Val, {usmUserSpinLock, volatile}); usmUserSpinLock(delete) -> diff --git a/lib/snmp/src/agent/snmp_view_based_acm_mib.erl b/lib/snmp/src/agent/snmp_view_based_acm_mib.erl index c6eeb7cea2..56b5d96142 100644 --- a/lib/snmp/src/agent/snmp_view_based_acm_mib.erl +++ b/lib/snmp/src/agent/snmp_view_based_acm_mib.erl @@ -48,6 +48,7 @@ -include("SNMPv2-TC.hrl"). -include("SNMP-VIEW-BASED-ACM-MIB.hrl"). -include("snmpa_vacm.hrl"). +-include("snmpa_internal.hrl"). -define(VMODULE,"VACM-MIB"). @@ -860,10 +861,12 @@ vacmViewSpinLock(print) -> vacmViewSpinLock(new) -> snmp_generic:variable_func(new, volatile_db(vacmViewSpinLock)), - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - Val = random:uniform(2147483648) - 1, + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), + Val = rand:uniform(2147483648) - 1, snmp_generic:variable_func(set, Val, volatile_db(vacmViewSpinLock)); vacmViewSpinLock(delete) -> diff --git a/lib/snmp/src/agent/snmpa_mpd.erl b/lib/snmp/src/agent/snmpa_mpd.erl index b440d57d03..2ec5dcb5e6 100644 --- a/lib/snmp/src/agent/snmpa_mpd.erl +++ b/lib/snmp/src/agent/snmpa_mpd.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1997-2015. All Rights Reserved. +%% Copyright Ericsson AB 1997-2019. 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. @@ -76,11 +76,9 @@ init(Vsns) -> ?vlog("init -> entry with" "~n Vsns: ~p", [Vsns]), - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - ets:insert(snmp_agent_table, {msg_id, random:uniform(2147483647)}), - ets:insert(snmp_agent_table, {req_id, random:uniform(2147483647)}), + ?SNMP_RAND_SEED(), + ets:insert(snmp_agent_table, {msg_id, rand:uniform(2147483647)}), + ets:insert(snmp_agent_table, {req_id, rand:uniform(2147483647)}), init_counters(), init_versions(Vsns, #state{}). diff --git a/lib/snmp/src/agent/snmpa_trap.erl b/lib/snmp/src/agent/snmpa_trap.erl index d04b6a206e..f741c3aaa9 100644 --- a/lib/snmp/src/agent/snmpa_trap.erl +++ b/lib/snmp/src/agent/snmpa_trap.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2016. All Rights Reserved. +%% Copyright Ericsson AB 1996-2019. 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. @@ -364,13 +364,14 @@ send_trap(TrapRec, NotifyName, ContextName, Recv, Vbs, LocalEngineID, LocalEngineID, ExtraInfo, NetIf) end catch - T:E -> - Info = [{args, [TrapRec, NotifyName, ContextName, - Recv, Vbs, LocalEngineID, ExtraInfo, NetIf]}, - {tag, T}, - {err, E}, - {stacktrace, erlang:get_stacktrace()}], - ?vlog("snmpa_trap:send_trap exception: ~p", [Info]), + C:E:S -> + Info = [{args, [TrapRec, NotifyName, ContextName, + Recv, Vbs, LocalEngineID, ExtraInfo, NetIf]}, + {class, C}, + {err, E}, + {stacktrace, S}], + ?vlog("snmpa_trap:send_trap exception: " + "~n ~p", [Info]), {error, {failed_sending_trap, Info}} end. diff --git a/lib/snmp/src/agent/snmpa_usm.erl b/lib/snmp/src/agent/snmpa_usm.erl index fb616cd9ef..1debceae98 100644 --- a/lib/snmp/src/agent/snmpa_usm.erl +++ b/lib/snmp/src/agent/snmpa_usm.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1999-2015. All Rights Reserved. +%% Copyright Ericsson AB 1999-2019. 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. @@ -646,10 +646,12 @@ get_des_salt() -> ets:insert(snmp_agent_table, {usm_des_salt, 0}), 0; _ -> % it doesn't exist, initialize - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - R = random:uniform(4294967295), + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), + R = rand:uniform(4294967295), ets:insert(snmp_agent_table, {usm_des_salt, R}), R end, @@ -679,10 +681,12 @@ get_aes_salt() -> ets:insert(snmp_agent_table, {usm_aes_salt, 0}), 0; _ -> % it doesn't exist, initialize - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - R = random:uniform(36893488147419103231), + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), + R = rand:uniform(36893488147419103231), ets:insert(snmp_agent_table, {usm_aes_salt, R}), R end, diff --git a/lib/snmp/src/app/snmp_internal.hrl b/lib/snmp/src/app/snmp_internal.hrl index 374767df15..f9a758ab7b 100644 --- a/lib/snmp/src/app/snmp_internal.hrl +++ b/lib/snmp/src/app/snmp_internal.hrl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2006-2016. All Rights Reserved. +%% Copyright Ericsson AB 2006-2019. 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. @@ -25,7 +25,12 @@ -define(APPLICATION, snmp). -endif. --define(STACK(), erlang:get_stacktrace()). + +-define(SNMP_RAND_SEED_ALG, exrop). +-define(SNMP_RAND_SEED(), rand:seed(?SNMP_RAND_SEED_ALG, + {erlang:phash2([node()]), + erlang:monotonic_time(), + erlang:unique_integer()})). -define(snmp_info(C, F, A), ?snmp_msg(info_msg, C, F, A)). -define(snmp_warning(C, F, A), ?snmp_msg(warning_msg, C, F, A)). @@ -39,5 +44,3 @@ -endif. % -ifdef(snmp_internal). - - diff --git a/lib/snmp/src/compile/Makefile b/lib/snmp/src/compile/Makefile index 4093ffa9ca..d9678669a5 100644 --- a/lib/snmp/src/compile/Makefile +++ b/lib/snmp/src/compile/Makefile @@ -2,7 +2,7 @@ # %CopyrightBegin% # -# Copyright Ericsson AB 1997-2016. All Rights Reserved. +# Copyright Ericsson AB 1997-2019. 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. @@ -59,6 +59,8 @@ PARSER_TARGET = $(PARSER_MODULE).$(EMULATOR) # ---------------------------------------------------- # FLAGS # ---------------------------------------------------- +ERL_COMPILE_FLAGS += -pa $(ERL_TOP)/lib/snmp/ebin + ifeq ($(WARN_UNUSED_VARS),true) ERL_COMPILE_FLAGS += +warn_unused_vars endif diff --git a/lib/snmp/src/compile/snmpc.erl b/lib/snmp/src/compile/snmpc.erl index c810bfcd41..4249799195 100644 --- a/lib/snmp/src/compile/snmpc.erl +++ b/lib/snmp/src/compile/snmpc.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1997-2018. All Rights Reserved. +%% Copyright Ericsson AB 1997-2019. 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. @@ -31,6 +31,7 @@ -export([init/3]). -include_lib("stdlib/include/erl_compile.hrl"). +-include_lib("snmp/src/app/snmp_internal.hrl"). -include("snmp_types.hrl"). -include("snmpc.hrl"). -include("snmpc_lib.hrl"). @@ -413,9 +414,11 @@ get_verbosity(Options) -> %%---------------------------------------------------------------------- init(From, MibFileName, Options) -> - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), put(options, Options), put(verbosity, get_verbosity(Options)), put(description, get_description(Options)), diff --git a/lib/snmp/src/manager/snmpm_config.erl b/lib/snmp/src/manager/snmpm_config.erl index 118cdcd1df..cd9fecd4d4 100644 --- a/lib/snmp/src/manager/snmpm_config.erl +++ b/lib/snmp/src/manager/snmpm_config.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2004-2016. All Rights Reserved. +%% Copyright Ericsson AB 2004-2019. 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. @@ -479,10 +479,7 @@ agent_info(Domain, Address, Item) when is_atom(Domain) -> NAddress -> do_agent_info(Domain, NAddress, Item) catch - _Thrown -> - %% p(?MODULE_STRING":agent_info(~p, ~p, ~p) throwed ~p at.~n" - %% " ~p", - %% [Domain, Address, Item, _Thrown, erlang:get_stacktrace()]), + _C:_E:_S -> {error, not_found} end; agent_info(Ip, Port, Item) when is_integer(Port) -> @@ -493,10 +490,7 @@ agent_info(Ip, Port, Item) when is_integer(Port) -> Address -> do_agent_info(Domain, Address, Item) catch - _Thrown -> - %% p(?MODULE_STRING":agent_info(~p, ~p, ~p) throwed ~p at.~n" - %% " ~p", - %% [Ip, Port, Item, _Thrown, erlang:get_stacktrace()]), + _C:_E:_S -> {error, not_found} end. @@ -1688,9 +1682,10 @@ read_agents_config_file(Dir) -> Check = fun check_agent_config/2, try read_file(Dir, "agents.conf", Order, Check, []) catch - throw:Error -> - ?vlog("agent config error: ~p", [Error]), - erlang:raise(throw, Error, erlang:get_stacktrace()) + throw:E:S -> + ?vlog("agent config error: " + "~n ~p", [E]), + erlang:raise(throw, E, S) end. check_agent_config(Agent, State) -> @@ -1935,9 +1930,10 @@ read_users_config_file(Dir) -> Check = fun (User, State) -> {check_user_config(User), State} end, try read_file(Dir, "users.conf", Order, Check, []) catch - throw:Error -> - ?vlog("failure reading users config file: ~n ~p", [Error]), - erlang:raise(throw, Error, erlang:get_stacktrace()) + throw:E:S -> + ?vlog("failure reading users config file: " + "~n ~p", [E]), + erlang:raise(throw, E, S) end. check_user_config({Id, Mod, Data}) -> @@ -2351,10 +2347,11 @@ read_file(Dir, FileName, Order, Check, Default) -> read_file(Dir, FileName, Order, Check) -> try snmp_conf:read(filename:join(Dir, FileName), Order, Check) catch - throw:{error, Reason} = Error + throw:{error, Reason} = E:S when element(1, Reason) =:= failed_open -> - error_msg("failed reading config from ~s: ~p", [FileName, Reason]), - erlang:raise(throw, Error, erlang:get_stacktrace()) + error_msg("failed reading config from ~s: " + "~n ~p", [FileName, Reason]), + erlang:raise(throw, E, S) end. %%-------------------------------------------------------------------- diff --git a/lib/snmp/src/manager/snmpm_mpd.erl b/lib/snmp/src/manager/snmpm_mpd.erl index 191dc2c281..8d0a7918a6 100644 --- a/lib/snmp/src/manager/snmpm_mpd.erl +++ b/lib/snmp/src/manager/snmpm_mpd.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2004-2015. All Rights Reserved. +%% Copyright Ericsson AB 2004-2019. 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. @@ -68,11 +68,13 @@ %%%----------------------------------------------------------------- init(Vsns) -> ?vdebug("init -> entry with ~p", [Vsns]), - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), - snmpm_config:cre_counter(msg_id, random:uniform(2147483647)), - snmpm_config:cre_counter(req_id, random:uniform(2147483647)), + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), + snmpm_config:cre_counter(msg_id, rand:uniform(2147483647)), + snmpm_config:cre_counter(req_id, rand:uniform(2147483647)), init_counters(), State = init_versions(Vsns, #state{}), init_usm(State#state.v3), diff --git a/lib/snmp/src/manager/snmpm_net_if.erl b/lib/snmp/src/manager/snmpm_net_if.erl index 29216f9d6a..184f782860 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 2004-2017. All Rights Reserved. +%% Copyright Ericsson AB 2004-2019. 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. @@ -182,11 +182,9 @@ worker(Worker, Failer, #state{log = Log} = State) -> %% Winds up in handle_info {'DOWN', ...} erlang:exit({net_if_worker, Result}) catch - Class:Reason -> + C:E:S -> %% Winds up in handle_info {'DOWN', ...} - erlang:exit( - {net_if_worker, Failer, - Class, Reason, erlang:get_stacktrace()}) + erlang:exit({net_if_worker, Failer, C, E, S}) end end, [monitor]). @@ -983,11 +981,10 @@ udp_send(Sock, To, Msg) -> error_msg("failed sending message to ~p:~p:~n" " ~p",[IpAddr, IpPort, Reason]) catch - error:Error -> - error_msg("failed sending message to ~p:~p:~n" - " error:~p~n" - " ~p", - [IpAddr, IpPort, Error, erlang:get_stacktrace()]) + error:E:S -> + error_msg("failed sending message to ~p:~p:" + "~n ~p" + "~n ~p", [IpAddr, IpPort, E, S]) end. sz(B) when is_binary(B) -> diff --git a/lib/snmp/src/manager/snmpm_server.erl b/lib/snmp/src/manager/snmpm_server.erl index c8d7fa1e8b..a6ca2b2b14 100644 --- a/lib/snmp/src/manager/snmpm_server.erl +++ b/lib/snmp/src/manager/snmpm_server.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2004-2015. All Rights Reserved. +%% Copyright Ericsson AB 2004-2019. 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. @@ -1755,9 +1755,10 @@ handle_error(_UserId, Mod, Reason, ReqId, Data, _State) -> Mod:handle_error(ReqId, Reason, Data) end catch - T:E -> + C:E:S -> CallbackArgs = [ReqId, Reason, Data], - handle_invalid_result(handle_error, CallbackArgs, T, E) + handle_invalid_result(handle_error, CallbackArgs, + C, E, S) end end, handle_callback(F), @@ -1948,9 +1949,10 @@ handle_pdu( Mod:handle_pdu(TargetName, ReqId, SnmpResponse, Data) end catch - T:E -> + C:E:S -> CallbackArgs = [TargetName, ReqId, SnmpResponse, Data], - handle_invalid_result(handle_pdu, CallbackArgs, T, E) + handle_invalid_result(handle_pdu, CallbackArgs, + C, E, S) end end, handle_callback(F), @@ -2119,10 +2121,10 @@ do_handle_agent(DefUserId, DefMod, "<~p,~p>: ~n~w", [Type, Domain, Addr, SnmpInfo]) end; - T:E -> + C:E:S -> CallbackArgs = [Domain_or_Ip, Addr_or_Port, Type, SnmpInfo, DefData], - handle_invalid_result(handle_agent, CallbackArgs, T, E) + handle_invalid_result(handle_agent, CallbackArgs, C, E, S) end. @@ -2331,8 +2333,8 @@ do_handle_trap( handle_invalid_result(handle_trap, CallbackArgs, InvalidResult) catch - T:E -> - handle_invalid_result(handle_trap, CallbackArgs, T, E) + C:E:S -> + handle_invalid_result(handle_trap, CallbackArgs, C, E, S) end. @@ -2523,8 +2525,8 @@ do_handle_inform( reply catch - T:E -> - handle_invalid_result(handle_inform, CallbackArgs, T, E), + C:E:S -> + handle_invalid_result(handle_inform, CallbackArgs, C, E, S), reply end, @@ -2837,8 +2839,8 @@ do_handle_report( reply catch - T:E -> - handle_invalid_result(handle_report, CallbackArgs, T, E), + C:E:S -> + handle_invalid_result(handle_report, CallbackArgs, C, E, S), reply end. @@ -2855,15 +2857,14 @@ handle_callback(F) -> -handle_invalid_result(Func, Args, T, E) -> - Stacktrace = ?STACK(), +handle_invalid_result(Func, Args, C, E, S) -> error_msg("Callback function failed: " "~n Function: ~p" "~n Args: ~p" - "~n Error Type: ~p" + "~n Class: ~p" "~n Error: ~p" "~n Stacktrace: ~p", - [Func, Args, T, E, Stacktrace]). + [Func, Args, C, E, S]). handle_invalid_result(Func, Args, InvalidResult) -> error_msg("Callback function returned invalid result: " diff --git a/lib/snmp/src/misc/snmp_conf.erl b/lib/snmp/src/misc/snmp_conf.erl index 513616a285..d73291764d 100644 --- a/lib/snmp/src/misc/snmp_conf.erl +++ b/lib/snmp/src/misc/snmp_conf.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2016. All Rights Reserved. +%% Copyright Ericsson AB 1996-2019. 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. @@ -236,15 +236,16 @@ read_check(File, Check, [{StartLine, Row, EndLine}|Lines], State, Res) -> " NewRow: ~p~n", [NewRow]), read_check(File, Check, Lines, NewState, [NewRow | Res]) catch - {error, Reason} -> - ?vtrace("read_check -> error:~n" - " Reason: ~p", [Reason]), + throw:{error, Reason} -> + ?vtrace("read_check -> error:" + "~n Reason: ~p", [Reason]), error({failed_check, File, StartLine, EndLine, Reason}); - Class:Reason -> - Error = {Class,Reason,erlang:get_stacktrace()}, - ?vtrace("read_check -> failure:~n" - " Error: ~p", [Error]), - error({failed_check, File, StartLine, EndLine, Error}) + C:E:S -> + ?vtrace("read_check -> failure:" + "~n Class: ~p" + "~n Error: ~p" + "~n Stack: ~p", [C, E, S]), + error({failed_check, File, StartLine, EndLine, {C, E, S}}) end. open_file(File) -> diff --git a/lib/snmp/src/misc/snmp_config.erl b/lib/snmp/src/misc/snmp_config.erl index 45661b71a7..26e85897f4 100644 --- a/lib/snmp/src/misc/snmp_config.erl +++ b/lib/snmp/src/misc/snmp_config.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2016. All Rights Reserved. +%% Copyright Ericsson AB 1996-2019. 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. @@ -2573,15 +2573,17 @@ write_config_file(Dir, FileName, Order, Check, Write, Entries) Error end catch - Error -> - S = erlang:get_stacktrace(), - d("File write of ~s throwed: ~p~n ~p~n", - [FileName, Error, S]), - Error; - C:E -> - S = erlang:get_stacktrace(), - d("File write of ~s exception: ~p:~p~n ~p~n", - [FileName,C,E,S]), + throw:E:S -> + d("File write of ~s throwed: " + "~n ~p" + "~n ~p" + "~n", [FileName, E, S]), + E; + C:E:S -> + d("File write of ~s exception: " + "~n ~p:~p" + "~n ~p" + "~n", [FileName, C, E, S]), {error, {failed_write, Dir, FileName, {C, E, S}}} end. @@ -2590,16 +2592,18 @@ write_config_file(Dir, FileName, Write, Entries, Fd) -> ok -> close_config_file(Dir, FileName, Fd) catch - Error -> - S = erlang:get_stacktrace(), - d("File write of ~s throwed: ~p~n ~p~n", - [FileName, Error, S]), + throw:E:S -> + d("File write of ~s throwed: " + "~n ~p" + "~n ~p" + "~n", [FileName, E, S]), close_config_file(Dir, FileName, Fd), - Error; - C:E -> - S = erlang:get_stacktrace(), - d("File write of ~s exception: ~p:~p~n ~p~n", - [FileName,C,E,S]), + E; + C:E:S -> + d("File write of ~s exception: " + "~n ~p:~p" + "~n ~p" + "~n", [FileName, C, E, S]), close_config_file(Dir, FileName, Fd), {error, {failed_write, Dir, FileName, {C, E, S}}} end. @@ -2661,16 +2665,18 @@ append_config_file(Dir, FileName, Order, Check, Write, Entries, Fd) -> ok -> close_config_file(Dir, FileName, Fd) catch - Error -> - S = erlang:get_stacktrace(), - d("File append of ~s throwed: ~p~n ~p~n", - [FileName, Error, S]), + throw:E:S -> + d("File append of ~s throwed: " + "~n ~p" + "~n ~p" + "~n", [FileName, E, S]), close_config_file(Dir, FileName, Fd), - Error; - C:E -> - S = erlang:get_stacktrace(), - d("File append of ~s exception: ~p:~p~n ~p~n", - [FileName,C,E,S]), + E; + C:E:S -> + d("File append of ~s exception: " + "~n ~p:~p" + "~n ~p" + "~n", [FileName, C, E, S]), close_config_file(Dir, FileName, Fd), {error, {failed_append, Dir, FileName, {C, E, S}}} end. @@ -2702,16 +2708,18 @@ read_config_file(Dir, FileName, Order, Check) SortedLines = sort_lines(Lines, Order), {ok, verify_lines(SortedLines, Check, undefined, [])} catch - Error -> - S = erlang:get_stacktrace(), - d("File read of ~s throwed: ~p~n ~p~n", - [FileName, Error, S]), - {error, Error}; - T:E -> - S = erlang:get_stacktrace(), - d("File read of ~s exception: ~p:~p~n ~p~n", - [FileName,T,E,S]), - {error, {failed_read, Dir, FileName, {T, E, S}}} + throw:E:S -> + d("File read of ~s throwed: " + "~n ~p" + "~n ~p" + "~n", [FileName, E, S]), + {error, E}; + C:E:S -> + d("File read of ~s exception: " + "~n ~p:~p" + "~n ~p" + "~n", [FileName, C, E, S]), + {error, {failed_read, Dir, FileName, {C, E, S}}} after file:close(Fd) end; @@ -2760,11 +2768,10 @@ verify_lines( {{ok, NewTerm}, NewState} -> verify_lines(Lines, Check, NewState, [NewTerm|Acc]) catch - {error, Reason} -> + throw:{error, Reason}:_ -> throw({failed_check, StartLine, EndLine, Reason}); - C:R -> - S = erlang:get_stacktrace(), - throw({failed_check, StartLine, EndLine, {C, R, S}}) + C:E:S -> + throw({failed_check, StartLine, EndLine, {C, E, S}}) end. diff --git a/lib/snmp/test/snmp_manager_config_test.erl b/lib/snmp/test/snmp_manager_config_test.erl index 64d3134055..ccbdd77629 100644 --- a/lib/snmp/test/snmp_manager_config_test.erl +++ b/lib/snmp/test/snmp_manager_config_test.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2004-2016. All Rights Reserved. +%% Copyright Ericsson AB 2004-2019. 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. @@ -35,6 +35,7 @@ -include_lib("common_test/include/ct.hrl"). -include("snmp_test_lib.hrl"). -include_lib("snmp/src/manager/snmpm_usm.hrl"). +-include_lib("snmp/src/app/snmp_internal.hrl"). %%---------------------------------------------------------------------- @@ -2259,11 +2260,13 @@ create_and_increment(Conf) when is_list(Conf) -> ?line {ok, _Pid} = snmpm_config:start_link(Opts), %% Random init - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), - StartVal = random:uniform(2147483647), + StartVal = rand:uniform(2147483647), IncVal = 42, EndVal = StartVal + IncVal, diff --git a/lib/snmp/test/snmp_test_mgr.erl b/lib/snmp/test/snmp_test_mgr.erl index 73a4d56084..9190c07e6d 100644 --- a/lib/snmp/test/snmp_test_mgr.erl +++ b/lib/snmp/test/snmp_test_mgr.erl @@ -52,6 +52,7 @@ -include_lib("snmp/include/snmp_types.hrl"). -include_lib("snmp/include/STANDARD-MIB.hrl"). -include("snmp_test_lib.hrl"). +-include_lib("snmp/src/app/snmp_internal.hrl"). -record(state, {dbg = true, quiet, @@ -192,9 +193,11 @@ receive_trap(Timeout) -> init({Options, CallerPid}) -> put(sname, mgr), put(verbosity, debug), - random:seed(erlang:phash2([node()]), - erlang:monotonic_time(), - erlang:unique_integer()), + ?SNMP_RAND_SEED(), + %% rand:seed(exrop, + %% {erlang:phash2([node()]), + %% erlang:monotonic_time(), + %% erlang:unique_integer()}), case (catch is_options_ok(Options)) of true -> put(debug, get_value(debug, Options, false)), @@ -668,7 +671,6 @@ make_vb(Oid) -> #varbind{oid = Oid, variabletype = 'NULL', value = 'NULL'}. make_request_id() -> - %% random:uniform(16#FFFFFFF-1). snmp_test_mgr_counter_server:increment(mgr_request_id, 1, 1, 2147483647). echo_pdu(PDU, MiniMIB) -> @@ -1141,5 +1143,5 @@ d(_,_F,_A) -> print(F, A) -> ?PRINT2("MGR " ++ F, A). -formated_timestamp() -> - snmp_test_lib:formated_timestamp(). +%% formated_timestamp() -> +%% snmp_test_lib:formated_timestamp(). diff --git a/lib/stdlib/doc/src/binary.xml b/lib/stdlib/doc/src/binary.xml index f3d4edd30f..fd991f258b 100644 --- a/lib/stdlib/doc/src/binary.xml +++ b/lib/stdlib/doc/src/binary.xml @@ -505,15 +505,16 @@ store(Binary, GBSet) -> <<1,1,1,1,1 ... 2> byte_size(A). 100 -3> binary:referenced_byte_size(A) +3> binary:referenced_byte_size(A). 100 -4> <<_:10/binary,B:10/binary,_/binary>> = A. +4> <<B:10/binary, C:90/binary>> = A. <<1,1,1,1,1 ... -5> byte_size(B). -10 -6> binary:referenced_byte_size(B) -100</code> - +5> {byte_size(B), binary:referenced_byte_size(B)}. +{10,10} +6> {byte_size(C), binary:referenced_byte_size(C)}. +{90,100}</code> + <p>In the above example, the small binary <c>B</c> was copied while the + larger binary <c>C</c> references binary <c>A</c>.</p> <note> <p>Binary data is shared among processes. If another process still references the larger binary, copying the part this |