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| author | Dan Gudmundsson <[email protected]> | 2014-02-18 17:21:55 +0100 |
|---|---|---|
| committer | Dan Gudmundsson <[email protected]> | 2014-02-19 15:32:19 +0100 |
| commit | 397e69fa95457f9660831ba1e551c784eb61e93e (patch) | |
| tree | 4a77b0bc80de8adfd3ec9e70b08c276220cafacb /lib/kernel/test/application_SUITE_data/deadlock | |
| parent | 6c9002f9174d40b69b3a5bcd5ef219ce4ceb3622 (diff) | |
| download | otp-397e69fa95457f9660831ba1e551c784eb61e93e.tar.gz otp-397e69fa95457f9660831ba1e551c784eb61e93e.tar.bz2 otp-397e69fa95457f9660831ba1e551c784eb61e93e.zip | |
kernel: Fix an application terminate deadlock possibility
Could happen if get_child was called during terminate.
io (since it is a group_leader) also causes problems after
get_child was called.
Split up and do it async.
Diffstat (limited to 'lib/kernel/test/application_SUITE_data/deadlock')
| -rw-r--r-- | lib/kernel/test/application_SUITE_data/deadlock/deadlock.app | 2 | ||||
| -rw-r--r-- | lib/kernel/test/application_SUITE_data/deadlock/deadlock.erl | 12 |
2 files changed, 12 insertions, 2 deletions
diff --git a/lib/kernel/test/application_SUITE_data/deadlock/deadlock.app b/lib/kernel/test/application_SUITE_data/deadlock/deadlock.app index 0c1001bed6..233c7a3f76 100644 --- a/lib/kernel/test/application_SUITE_data/deadlock/deadlock.app +++ b/lib/kernel/test/application_SUITE_data/deadlock/deadlock.app @@ -4,5 +4,5 @@ {applications, [kernel, stdlib, sasl]}, {modules, [deadlock]}, {mod, {deadlock, []}}, - {env, [{fail_start, false}]} + {env, [{fail_start, false}, {fail_stop, false}]} ]}. diff --git a/lib/kernel/test/application_SUITE_data/deadlock/deadlock.erl b/lib/kernel/test/application_SUITE_data/deadlock/deadlock.erl index 5f68bf9078..3ef6105371 100644 --- a/lib/kernel/test/application_SUITE_data/deadlock/deadlock.erl +++ b/lib/kernel/test/application_SUITE_data/deadlock/deadlock.erl @@ -21,7 +21,7 @@ init([sup]) -> {ok, {{one_for_one, 5, 10}, [ { sasl_syslog_dm, {?MODULE, start_link, []}, - permanent, brutal_kill, worker, + permanent, 25000, worker, [deadlock] } ]}}; @@ -32,6 +32,8 @@ init([sup]) -> init([child]) -> case application:get_env(deadlock, fail_start) of {ok, false} -> + process_flag(trap_exit, true), + io:format("~p: Traps exit~n",[?MODULE]), %% we must not fail on the first init, otherwise supervisor %% terminates immediately {ok, []}; @@ -50,6 +52,14 @@ handle_info(_Msg, State) -> {noreply, State}. terminate(_Reason, _State) -> + case application:get_env(deadlock, fail_stop) of + {ok, false} -> ok; + {ok, Tester} -> + Tester ! {deadlock, self()}, + io:format("~p: Waiting in terminate (~p)~n",[?MODULE,Tester]), + receive continue -> ok end + end, + io:format("~p: terminates~n", [?MODULE]), ok. code_change(_OldVsn, State, _Extra) -> |