diff options
| -rw-r--r-- | lib/stdlib/src/supervisor.erl | 27 | ||||
| -rw-r--r-- | lib/stdlib/test/Makefile | 1 | ||||
| -rw-r--r-- | lib/stdlib/test/supervisor_3.erl | 45 | ||||
| -rw-r--r-- | lib/stdlib/test/supervisor_SUITE.erl | 106 |
4 files changed, 171 insertions, 8 deletions
diff --git a/lib/stdlib/src/supervisor.erl b/lib/stdlib/src/supervisor.erl index 9f93747c3e..54328cd9ff 100644 --- a/lib/stdlib/src/supervisor.erl +++ b/lib/stdlib/src/supervisor.erl @@ -63,7 +63,9 @@ %%-------------------------------------------------------------------------- -record(child, {% pid is undefined when child is not running - pid = undefined :: child() | {restarting,pid()} | [pid()], + pid = undefined :: child() + | {restarting, pid() | undefined} + | [pid()], name :: child_id(), mfargs :: mfargs(), restart_type :: restart(), @@ -752,6 +754,9 @@ restart(Child, State) -> end, timer:apply_after(0,?MODULE,try_again_restart,[self(),Id]), {ok,NState2}; + {try_again, NState2, #child{name=ChName}} -> + timer:apply_after(0,?MODULE,try_again_restart,[self(),ChName]), + {ok,NState2}; Other -> Other end; @@ -798,10 +803,16 @@ restart(rest_for_one, Child, State) -> case start_children(ChAfter2, State#state.name) of {ok, ChAfter3} -> {ok, State#state{children = ChAfter3 ++ ChBefore}}; - {error, ChAfter3, _Reason} -> + {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)} + {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} end; restart(one_for_all, Child, State) -> Children1 = del_child(Child#child.pid, State#state.children), @@ -809,10 +820,16 @@ restart(one_for_all, Child, State) -> case start_children(Children2, State#state.name) of {ok, NChs} -> {ok, State#state{children = NChs}}; - {error, NChs, _Reason} -> + {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)} + {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} end. restarting(Pid) when is_pid(Pid) -> ?restarting(Pid); diff --git a/lib/stdlib/test/Makefile b/lib/stdlib/test/Makefile index 6aa09d7bd0..af82f22b21 100644 --- a/lib/stdlib/test/Makefile +++ b/lib/stdlib/test/Makefile @@ -66,6 +66,7 @@ MODULES= \ string_SUITE \ supervisor_1 \ supervisor_2 \ + supervisor_3 \ supervisor_deadlock \ naughty_child \ shell_SUITE \ diff --git a/lib/stdlib/test/supervisor_3.erl b/lib/stdlib/test/supervisor_3.erl new file mode 100644 index 0000000000..31b3037d6f --- /dev/null +++ b/lib/stdlib/test/supervisor_3.erl @@ -0,0 +1,45 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 1996-2011. All Rights Reserved. +%% +%% 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. +%% +%% %CopyrightEnd% +%% +%% Description: Simulates the behaviour that a child process may have. +%% Is used by the supervisor_SUITE test suite. +-module(supervisor_3). + +-export([start_child/2, init/1]). + +-export([handle_call/3, handle_info/2, terminate/2]). + +start_child(Name, Caller) -> + gen_server:start_link(?MODULE, [Name, Caller], []). + +init([Name, Caller]) -> + Caller ! {Name, self()}, + receive + {Result, Caller} -> + Result + end. + +handle_call(Req, _From, State) -> + {reply, Req, State}. + +handle_info(_, State) -> + {noreply, State}. + +terminate(_Reason, Time) -> + timer:sleep(Time), + ok. diff --git a/lib/stdlib/test/supervisor_SUITE.erl b/lib/stdlib/test/supervisor_SUITE.erl index 569c66959e..ff5be6bb95 100644 --- a/lib/stdlib/test/supervisor_SUITE.erl +++ b/lib/stdlib/test/supervisor_SUITE.erl @@ -53,9 +53,10 @@ %% Restart strategy tests -export([ one_for_one/1, one_for_one_escalation/1, one_for_all/1, - one_for_all_escalation/1, + one_for_all_escalation/1, one_for_all_other_child_fails_restart/1, simple_one_for_one/1, simple_one_for_one_escalation/1, rest_for_one/1, rest_for_one_escalation/1, + rest_for_one_other_child_fails_restart/1, simple_one_for_one_extra/1, simple_one_for_one_shutdown/1]). %% Misc tests @@ -107,12 +108,14 @@ groups() -> {restart_one_for_one, [], [one_for_one, one_for_one_escalation]}, {restart_one_for_all, [], - [one_for_all, one_for_all_escalation]}, + [one_for_all, one_for_all_escalation, + one_for_all_other_child_fails_restart]}, {restart_simple_one_for_one, [], [simple_one_for_one, simple_one_for_one_shutdown, simple_one_for_one_extra, simple_one_for_one_escalation]}, {restart_rest_for_one, [], - [rest_for_one, rest_for_one_escalation]}]. + [rest_for_one, rest_for_one_escalation, + rest_for_one_other_child_fails_restart]}]. init_per_suite(Config) -> Config. @@ -879,6 +882,57 @@ one_for_all_escalation(Config) when is_list(Config) -> %%------------------------------------------------------------------------- +%% Test that the supervisor terminates a restarted child when a different +%% child fails to start. +one_for_all_other_child_fails_restart(Config) when is_list(Config) -> + process_flag(trap_exit, true), + Self = self(), + Child1 = {child1, {supervisor_3, start_child, [child1, Self]}, + permanent, 1000, worker, []}, + Child2 = {child2, {supervisor_3, start_child, [child2, Self]}, + permanent, 1000, worker, []}, + Children = [Child1, Child2], + StarterFun = fun() -> + {ok, SupPid} = start_link({ok, {{one_for_all, 3, 3600}, Children}}), + Self ! {sup_pid, SupPid}, + receive {stop, Self} -> ok end + end, + StarterPid = spawn_link(StarterFun), + Ok = {{ok, undefined}, Self}, + %% Let the children start. + Child1Pid = receive {child1, Pid1} -> Pid1 end, + Child1Pid ! Ok, + Child2Pid = receive {child2, Pid2} -> Pid2 end, + Child2Pid ! Ok, + %% Supervisor started. + SupPid = receive {sup_pid, Pid} -> Pid end, + link(SupPid), + exit(Child1Pid, die), + %% Let child1 restart but don't let child2. + Child1Pid2 = receive {child1, Pid3} -> Pid3 end, + Child1Pid2Ref = erlang:monitor(process, Child1Pid2), + Child1Pid2 ! Ok, + Child2Pid2 = receive {child2, Pid4} -> Pid4 end, + Child2Pid2 ! {{stop, normal}, Self}, + %% Check child1 is terminated. + receive + {'DOWN', Child1Pid2Ref, _, _, shutdown} -> + ok; + {_childName, _Pid} -> + exit(SupPid, kill), + check_exit([StarterPid, SupPid]), + test_server:fail({restarting_child_not_terminated, Child1Pid2}) + end, + %% Let the restart complete. + Child1Pid3 = receive {child1, Pid5} -> Pid5 end, + Child1Pid3 ! Ok, + Child2Pid3 = receive {child2, Pid6} -> Pid6 end, + Child2Pid3 ! Ok, + StarterPid ! {stop, Self}, + check_exit([StarterPid, SupPid]). + + +%%------------------------------------------------------------------------- %% Test the simple_one_for_one base case. simple_one_for_one(Config) when is_list(Config) -> process_flag(trap_exit, true), @@ -1044,6 +1098,52 @@ rest_for_one_escalation(Config) when is_list(Config) -> terminate(SupPid, CPid1, child1, abnormal), check_exit([CPid2, SupPid]). + +%%------------------------------------------------------------------------- +%% Test that the supervisor terminates a restarted child when a different +%% child fails to start. +rest_for_one_other_child_fails_restart(Config) when is_list(Config) -> + process_flag(trap_exit, true), + Self = self(), + Child1 = {child1, {supervisor_3, start_child, [child1, Self]}, + permanent, 1000, worker, []}, + Child2 = {child2, {supervisor_3, start_child, [child2, Self]}, + permanent, 1000, worker, []}, + Children = [Child1, Child2], + StarterFun = fun() -> + {ok, SupPid} = start_link({ok, {{rest_for_one, 3, 3600}, Children}}), + Self ! {sup_pid, SupPid}, + receive {stop, Self} -> ok end + end, + StarterPid = spawn_link(StarterFun), + Ok = {{ok, undefined}, Self}, + %% Let the children start. + Child1Pid = receive {child1, Pid1} -> Pid1 end, + Child1Pid ! Ok, + Child2Pid = receive {child2, Pid2} -> Pid2 end, + Child2Pid ! Ok, + %% Supervisor started. + SupPid = receive {sup_pid, Pid} -> Pid end, + link(SupPid), + exit(Child1Pid, die), + %% Let child1 restart but don't let child2. + Child1Pid2 = receive {child1, Pid3} -> Pid3 end, + Child1Pid2 ! Ok, + Child2Pid2 = receive {child2, Pid4} -> Pid4 end, + Child2Pid2 ! {{stop, normal}, Self}, + %% Let child2 restart. + receive + {child2, Child2Pid3} -> + Child2Pid3 ! Ok; + {child1, _Child1Pid3} -> + exit(SupPid, kill), + check_exit([StarterPid, SupPid]), + test_server:fail({restarting_started_child, Child1Pid2}) + end, + StarterPid ! {stop, Self}, + check_exit([StarterPid, SupPid]). + + %%------------------------------------------------------------------------- %% Test that the supervisor does not hang forever if the child unliks %% and then is terminated by the supervisor. |