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-rw-r--r--lib/stdlib/doc/src/supervisor.xml5
-rw-r--r--lib/stdlib/src/dets_utils.erl4
-rw-r--r--lib/stdlib/src/dets_v8.erl4
-rw-r--r--lib/stdlib/src/dets_v9.erl4
-rw-r--r--lib/stdlib/src/dict.erl4
-rw-r--r--lib/stdlib/src/digraph.erl6
-rw-r--r--lib/stdlib/src/erl_lint.erl4
-rw-r--r--lib/stdlib/src/file_sorter.erl4
-rw-r--r--lib/stdlib/src/lists.erl4
-rw-r--r--lib/stdlib/src/otp_internal.erl14
-rw-r--r--lib/stdlib/src/qlc.erl4
-rw-r--r--lib/stdlib/src/rand.erl6
-rw-r--r--lib/stdlib/src/supervisor.erl63
-rw-r--r--lib/stdlib/src/unicode.erl4
-rw-r--r--lib/stdlib/src/zip.erl4
-rw-r--r--lib/stdlib/test/supervisor_SUITE.erl52
-rw-r--r--lib/stdlib/test/supervisor_deadlock.erl14
17 files changed, 153 insertions, 47 deletions
diff --git a/lib/stdlib/doc/src/supervisor.xml b/lib/stdlib/doc/src/supervisor.xml
index 24ff251ce3..815bf4a489 100644
--- a/lib/stdlib/doc/src/supervisor.xml
+++ b/lib/stdlib/doc/src/supervisor.xml
@@ -543,7 +543,10 @@
</item>
<item>
<p><c>active</c> - the count of all actively running child processes
- managed by this supervisor.</p>
+ managed by this supervisor. In the case of <c>simple_one_for_one</c>
+ supervisors, no check is carried out to ensure that each child process
+ is still alive, though the result provided here is likely to be very
+ accurate unless the supervisor is heavily overloaded.</p>
</item>
<item>
<p><c>supervisors</c> - the count of all children marked as
diff --git a/lib/stdlib/src/dets_utils.erl b/lib/stdlib/src/dets_utils.erl
index 196158cd48..34a8ddddaa 100644
--- a/lib/stdlib/src/dets_utils.erl
+++ b/lib/stdlib/src/dets_utils.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2001-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2016. 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.
@@ -747,6 +747,8 @@ all_allocated([{X,Y} | L], _X0, Y0, A) when Y0 < X ->
all_allocated_as_list(Head) ->
all_allocated_as_list(all(get_freelists(Head)), 0, Head#head.base, []).
+-dialyzer({no_improper_lists, all_allocated_as_list/4}).
+
all_allocated_as_list([], _X0, _Y0, []) ->
[];
all_allocated_as_list([], _X0, _Y0, A) ->
diff --git a/lib/stdlib/src/dets_v8.erl b/lib/stdlib/src/dets_v8.erl
index 49126193b8..1bf53d91b1 100644
--- a/lib/stdlib/src/dets_v8.erl
+++ b/lib/stdlib/src/dets_v8.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2001-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2016. 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.
@@ -36,6 +36,8 @@
%% For backward compatibility.
-export([sz2pos/1]).
+-dialyzer(no_improper_lists).
+
-compile({inline, [{sz2pos,1},{scan_skip,7}]}).
-compile({inline, [{skip_bytes,5}, {get_segp,1}]}).
-compile({inline, [{wl_lookup,5}]}).
diff --git a/lib/stdlib/src/dets_v9.erl b/lib/stdlib/src/dets_v9.erl
index 361780c776..6c406fc03a 100644
--- a/lib/stdlib/src/dets_v9.erl
+++ b/lib/stdlib/src/dets_v9.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2001-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2016. 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.
@@ -34,6 +34,8 @@
-export([cache_segps/3]).
+-dialyzer(no_improper_lists).
+
-compile({inline, [{max_objsize,1},{maxobjsize,1}]}).
-compile({inline, [{write_segment_file,6}]}).
-compile({inline, [{sz2pos,1},{adjsz,1}]}).
diff --git a/lib/stdlib/src/dict.erl b/lib/stdlib/src/dict.erl
index 6ce3710f87..f921e28ef6 100644
--- a/lib/stdlib/src/dict.erl
+++ b/lib/stdlib/src/dict.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2000-2014. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2016. 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.
@@ -333,6 +333,8 @@ update_counter(Key, Incr, D0) when is_number(Incr) ->
D0, Slot),
maybe_expand(D1, Ic).
+-dialyzer({no_improper_lists, counter_bkt/3}).
+
counter_bkt(Key, I, [?kv(Key,Val)|Bkt]) ->
{[?kv(Key,Val+I)|Bkt],0};
counter_bkt(Key, I, [Other|Bkt0]) ->
diff --git a/lib/stdlib/src/digraph.erl b/lib/stdlib/src/digraph.erl
index e51e560542..8a4df95027 100644
--- a/lib/stdlib/src/digraph.erl
+++ b/lib/stdlib/src/digraph.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1996-2014. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2016. 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.
@@ -338,6 +338,8 @@ edge(G, E) ->
%%
-spec new_edge_id(graph()) -> edge().
+-dialyzer({no_improper_lists, new_edge_id/1}).
+
new_edge_id(G) ->
NT = G#digraph.ntab,
[{'$eid', K}] = ets:lookup(NT, '$eid'),
@@ -350,6 +352,8 @@ new_edge_id(G) ->
%%
-spec new_vertex_id(graph()) -> vertex().
+-dialyzer({no_improper_lists, new_vertex_id/1}).
+
new_vertex_id(G) ->
NT = G#digraph.ntab,
[{'$vid', K}] = ets:lookup(NT, '$vid'),
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index e940ad6956..62b3169a6c 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -3532,6 +3532,8 @@ check_qlc_hrl(Line, M, F, As, St) ->
%% deprecated_function(Line, ModName, FuncName, [Arg], State) -> State.
%% Add warning for calls to deprecated functions.
+-dialyzer({no_match, deprecated_function/5}).
+
deprecated_function(Line, M, F, As, St) ->
Arity = length(As),
MFA = {M, F, Arity},
@@ -3560,6 +3562,8 @@ deprecated_function(Line, M, F, As, St) ->
St
end.
+-dialyzer({no_match, deprecated_type/5}).
+
deprecated_type(L, M, N, As, St) ->
NAs = length(As),
case otp_internal:obsolete_type(M, N, NAs) of
diff --git a/lib/stdlib/src/file_sorter.erl b/lib/stdlib/src/file_sorter.erl
index 47adb133b0..0d50392b96 100644
--- a/lib/stdlib/src/file_sorter.erl
+++ b/lib/stdlib/src/file_sorter.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2001-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2016. 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.
@@ -28,6 +28,8 @@
check/1, check/2,
keycheck/2, keycheck/3]).
+-dialyzer(no_improper_lists).
+
-include_lib("kernel/include/file.hrl").
-define(CHUNKSIZE, 16384).
diff --git a/lib/stdlib/src/lists.erl b/lib/stdlib/src/lists.erl
index 62b6ca8a21..2b4472cdf7 100644
--- a/lib/stdlib/src/lists.erl
+++ b/lib/stdlib/src/lists.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1996-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2016. 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.
@@ -2267,6 +2267,8 @@ ukeysplit_2(I, Y, EY, [Z | L], R) ->
ukeysplit_2(_I, Y, _EY, [], R) ->
[Y | R].
+-dialyzer({no_improper_lists, ukeymergel/3}).
+
ukeymergel(I, [T1, [H2 | T2], [H3 | T3] | L], Acc) ->
%% The fourth argument, [H2 | H3] (=HdM), may confuse type
%% checkers. Its purpose is to ensure that the tests H2 == HdM
diff --git a/lib/stdlib/src/otp_internal.erl b/lib/stdlib/src/otp_internal.erl
index c254ab1e46..9d394e19d7 100644
--- a/lib/stdlib/src/otp_internal.erl
+++ b/lib/stdlib/src/otp_internal.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1999-2015. All Rights Reserved.
+%% 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.
@@ -23,6 +23,8 @@
%%----------------------------------------------------------------------
+-dialyzer({no_match, obsolete/3}).
+
-type tag() :: 'deprecated' | 'removed'. %% | 'experimental'.
-type mfas() :: mfa() | {atom(), atom(), [byte()]}.
-type release() :: string().
@@ -698,17 +700,19 @@ is_snmp_agent_function(del_agent_caps, 1) -> true;
is_snmp_agent_function(get_agent_caps, 0) -> true;
is_snmp_agent_function(_, _) -> false.
+-dialyzer({no_match, obsolete_type/3}).
+
-spec obsolete_type(module(), atom(), arity()) ->
'no' | {tag(), string()} | {tag(), mfas(), release()}.
obsolete_type(Module, Name, NumberOfVariables) ->
case obsolete_type_1(Module, Name, NumberOfVariables) of
-%% {deprecated=Tag,{_,_,_}=Replacement} ->
-%% {Tag,Replacement,"in a future release"};
+ {deprecated=Tag,{_,_,_}=Replacement} ->
+ {Tag,Replacement,"in a future release"};
{_,String}=Ret when is_list(String) ->
Ret;
-%% {_,_,_}=Ret ->
-%% Ret;
+ {_,_,_}=Ret ->
+ Ret;
no ->
no
end.
diff --git a/lib/stdlib/src/qlc.erl b/lib/stdlib/src/qlc.erl
index 3ba3a88038..1ae7c6cc25 100644
--- a/lib/stdlib/src/qlc.erl
+++ b/lib/stdlib/src/qlc.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2004-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2004-2016. 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.
@@ -51,6 +51,8 @@
-export([template_state/0, aux_name/3, name_suffix/2, vars/1,
var_ufold/2, var_fold/3, all_selections/1]).
+-dialyzer(no_improper_lists).
+
%% When cache=list lists bigger than ?MAX_LIST_SIZE bytes are put on
%% file. Also used when merge join finds big equivalence classes.
-define(MAX_LIST_SIZE, 512*1024).
diff --git a/lib/stdlib/src/rand.erl b/lib/stdlib/src/rand.erl
index dc060e82d9..d455abf7b0 100644
--- a/lib/stdlib/src/rand.erl
+++ b/lib/stdlib/src/rand.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2015. All Rights Reserved.
+%% Copyright Ericsson AB 2015-2016. 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.
@@ -256,6 +256,8 @@ exs64_uniform(Max, {Alg, R}) ->
%% =====================================================================
-type exsplus_state() :: nonempty_improper_list(uint58(), uint58()).
+-dialyzer({no_improper_lists, exsplus_seed/1}).
+
exsplus_seed({A1, A2, A3}) ->
{_, R1} = exsplus_next([(((A1 * 4294967197) + 1) band ?UINT58MASK)|
(((A2 * 4294967231) + 1) band ?UINT58MASK)]),
@@ -263,6 +265,8 @@ exsplus_seed({A1, A2, A3}) ->
tl(R1)]),
R2.
+-dialyzer({no_improper_lists, exsplus_next/1}).
+
%% Advance xorshift116+ state for one step and generate 58bit unsigned integer
-spec exsplus_next(exsplus_state()) -> {uint58(), exsplus_state()}.
exsplus_next([S1|S0]) ->
diff --git a/lib/stdlib/src/supervisor.erl b/lib/stdlib/src/supervisor.erl
index 92a0c29011..cecdebd0c8 100644
--- a/lib/stdlib/src/supervisor.erl
+++ b/lib/stdlib/src/supervisor.erl
@@ -33,6 +33,9 @@
terminate/2, code_change/3]).
-export([try_again_restart/2]).
+%% For release_handler only
+-export([get_callback_module/1]).
+
%%--------------------------------------------------------------------------
-export_type([sup_flags/0, child_spec/0, startchild_ret/0, strategy/0]).
@@ -113,6 +116,7 @@
intensity :: non_neg_integer(),
period :: pos_integer(),
restarts = [],
+ dynamic_restarts = 0 :: non_neg_integer(),
module,
args}).
-type state() :: #state{}.
@@ -250,6 +254,17 @@ try_again_restart(Supervisor, Child) ->
cast(Supervisor, Req) ->
gen_server:cast(Supervisor, Req).
+%%%-----------------------------------------------------------------
+%%% Called by release_handler during upgrade
+-spec get_callback_module(Pid) -> Module when
+ Pid :: pid(),
+ Module :: atom().
+get_callback_module(Pid) ->
+ {status, _Pid, {module, _Mod},
+ [_PDict, _SysState, _Parent, _Dbg, Misc]} = sys:get_status(Pid),
+ [_Header, _Data, {data, [{"State", State}]}] = Misc,
+ State#state.module.
+
%%% ---------------------------------------------------
%%%
%%% Initialize the supervisor.
@@ -504,39 +519,26 @@ handle_call(which_children, _From, State) ->
handle_call(count_children, _From, #state{children = [#child{restart_type = temporary,
child_type = CT}]} = State)
when ?is_simple(State) ->
- {Active, Count} =
- ?SETS:fold(fun(Pid, {Alive, Tot}) ->
- case is_pid(Pid) andalso is_process_alive(Pid) of
- true ->{Alive+1, Tot +1};
- false ->
- {Alive, Tot + 1}
- end
- end, {0, 0}, dynamics_db(temporary, State#state.dynamics)),
+ Sz = ?SETS:size(dynamics_db(temporary, State#state.dynamics)),
Reply = case CT of
- supervisor -> [{specs, 1}, {active, Active},
- {supervisors, Count}, {workers, 0}];
- worker -> [{specs, 1}, {active, Active},
- {supervisors, 0}, {workers, Count}]
+ 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{children = [#child{restart_type = RType,
+handle_call(count_children, _From, #state{dynamic_restarts = Restarts,
+ children = [#child{restart_type = RType,
child_type = CT}]} = State)
when ?is_simple(State) ->
- {Active, Count} =
- ?DICTS:fold(fun(Pid, _Val, {Alive, Tot}) ->
- case is_pid(Pid) andalso is_process_alive(Pid) of
- true ->
- {Alive+1, Tot +1};
- false ->
- {Alive, Tot + 1}
- end
- end, {0, 0}, dynamics_db(RType, State#state.dynamics)),
+ Sz = ?DICTS:size(dynamics_db(RType, State#state.dynamics)),
+ Active = Sz - Restarts,
Reply = case CT of
supervisor -> [{specs, 1}, {active, Active},
- {supervisors, Count}, {workers, 0}];
+ {supervisors, Sz}, {workers, 0}];
worker -> [{specs, 1}, {active, Active},
- {supervisors, 0}, {workers, Count}]
+ {supervisors, 0}, {workers, Sz}]
end,
{reply, Reply, State};
@@ -806,8 +808,15 @@ restart(Child, State) ->
{shutdown, remove_child(Child, NState)}
end.
-restart(simple_one_for_one, Child, State) ->
+restart(simple_one_for_one, Child, State0) ->
#child{pid = OldPid, mfargs = {M, F, A}} = Child,
+ State = 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)),
case do_start_child_i(M, F, A) of
@@ -818,7 +827,9 @@ restart(simple_one_for_one, Child, State) ->
NState = State#state{dynamics = ?DICTS:store(Pid, A, Dynamics)},
{ok, NState};
{error, Error} ->
- NState = State#state{dynamics = ?DICTS:store(restarting(OldPid), A,
+ NRestarts = State#state.dynamic_restarts + 1,
+ NState = State#state{dynamic_restarts = NRestarts,
+ dynamics = ?DICTS:store(restarting(OldPid), A,
Dynamics)},
report_error(start_error, Error, Child, State#state.name),
{try_again, NState}
diff --git a/lib/stdlib/src/unicode.erl b/lib/stdlib/src/unicode.erl
index 3e8e6f5101..617da11ba8 100644
--- a/lib/stdlib/src/unicode.erl
+++ b/lib/stdlib/src/unicode.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2008-2013. All Rights Reserved.
+%% 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.
@@ -561,6 +561,8 @@ do_o_binary(F,L) ->
erlang:iolist_to_binary(List)
end.
+-dialyzer({no_improper_lists, do_o_binary2/2}).
+
do_o_binary2(_F,[]) ->
<<>>;
do_o_binary2(F,[H|T]) ->
diff --git a/lib/stdlib/src/zip.erl b/lib/stdlib/src/zip.erl
index bec0bd3f6d..f8ba6f18e9 100644
--- a/lib/stdlib/src/zip.erl
+++ b/lib/stdlib/src/zip.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2006-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2016. 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.
@@ -1566,6 +1566,8 @@ append_bins([_|_]=List, B) ->
append_bins([], B) ->
B.
+-dialyzer({no_improper_lists, pwrite_iolist/3}).
+
pwrite_iolist(B, Pos, Bin) ->
{Left, Right} = split_binary(B, Pos),
Sz = erlang:iolist_size(Bin),
diff --git a/lib/stdlib/test/supervisor_SUITE.erl b/lib/stdlib/test/supervisor_SUITE.erl
index 8cb2a5194a..903ca76575 100644
--- a/lib/stdlib/test/supervisor_SUITE.erl
+++ b/lib/stdlib/test/supervisor_SUITE.erl
@@ -67,6 +67,7 @@
%% Misc tests
-export([child_unlink/1, tree/1, count_children/1,
+ count_restarting_children/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,
@@ -90,7 +91,8 @@ all() ->
{group, normal_termination},
{group, shutdown_termination},
{group, abnormal_termination}, child_unlink, tree,
- count_children, do_not_save_start_parameters_for_temporary_children,
+ count_children, count_restarting_children,
+ 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,
@@ -1459,6 +1461,54 @@ count_children(Config) when is_list(Config) ->
[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),
+ Child = {child, {supervisor_deadlock, start_child_noreg, []},
+ permanent, brutal_kill, worker, []},
+ %% 2 sek delay on failing restart (see supervisor_deadlock.erl) ->
+ %% MaxR=20, MaxT=10 should ensure a restart loop when starting and
+ %% restarting 3 instances of the child (as below)
+ {ok, SupPid} = start_link({ok, {{simple_one_for_one, 20, 10}, [Child]}}),
+
+ %% Ets table with state read by supervisor_deadlock.erl
+ ets:new(supervisor_deadlock,[set,named_table,public]),
+ ets:insert(supervisor_deadlock,{fail_start,false}),
+
+ [1,0,0,0] = get_child_counts(SupPid),
+ {ok, Ch1_1} = supervisor:start_child(SupPid, []),
+ [1,1,0,1] = get_child_counts(SupPid),
+ {ok, Ch1_2} = supervisor:start_child(SupPid, []),
+ [1,2,0,2] = get_child_counts(SupPid),
+ {ok, Ch1_3} = supervisor:start_child(SupPid, []),
+ [1,3,0,3] = get_child_counts(SupPid),
+
+ supervisor_deadlock:restart_child(Ch1_1),
+ supervisor_deadlock:restart_child(Ch1_2),
+ supervisor_deadlock:restart_child(Ch1_3),
+ test_server:sleep(400),
+ [1,3,0,3] = get_child_counts(SupPid),
+ [Ch2_1, Ch2_2, Ch2_3] = [C || {_,C,_,_} <- supervisor:which_children(SupPid)],
+
+ ets:insert(supervisor_deadlock,{fail_start,true}),
+ supervisor_deadlock:restart_child(Ch2_1),
+ supervisor_deadlock:restart_child(Ch2_2),
+ test_server:sleep(4000), % allow restart to happen before proceeding
+ [1,1,0,3] = get_child_counts(SupPid),
+
+ ets:insert(supervisor_deadlock,{fail_start,false}),
+ test_server:sleep(4000), % allow restart to happen before proceeding
+ [1,3,0,3] = get_child_counts(SupPid),
+
+ ok = supervisor:terminate_child(SupPid, Ch2_3),
+ [1,2,0,2] = get_child_counts(SupPid),
+ [Ch3_1, Ch3_2] = [C || {_,C,_,_} <- supervisor:which_children(SupPid)],
+ ok = supervisor:terminate_child(SupPid, Ch3_1),
+ [1,1,0,1] = get_child_counts(SupPid),
+ ok = supervisor:terminate_child(SupPid, Ch3_2),
+ [1,0,0,0] = get_child_counts(SupPid).
+
+%%-------------------------------------------------------------------------
%% Temporary children shall not be restarted so they should not save
%% start parameters, as it potentially can take up a huge amount of
%% memory for no purpose.
diff --git a/lib/stdlib/test/supervisor_deadlock.erl b/lib/stdlib/test/supervisor_deadlock.erl
index 288547a972..8d3d1c6f30 100644
--- a/lib/stdlib/test/supervisor_deadlock.erl
+++ b/lib/stdlib/test/supervisor_deadlock.erl
@@ -11,9 +11,11 @@ init([child]) ->
%% terminates immediately
{ok, []};
[{fail_start, true}] ->
- %% Restart frequency is MaxR=8, MaxT=10, so this will
- %% ensure that restart intensity is not reached -> restart
- %% loop
+ %% A restart frequency of MaxR=8, MaxT=10 should ensure
+ %% that restart intensity is not reached -> restart loop.
+ %% (Note that if we use simple_one_for_one, and start
+ %% 'many' child instances, the restart frequency must be
+ %% ajusted accordingly.)
timer:sleep(2000), % NOTE: this could be a gen_server call timeout
{stop, error}
@@ -41,5 +43,11 @@ code_change(_OldVsn, State, _Extra) ->
start_child() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [child], []).
+start_child_noreg() ->
+ gen_server:start_link(?MODULE, [child], []).
+
restart_child() ->
gen_server:cast(supervisor_deadlock, restart).
+
+restart_child(Pid) ->
+ gen_server:cast(Pid, restart).
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-29 00:06:05 +0000