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* thread.c (rb_thread_atfork_internal): reinitialize global lock

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at fork to get rid of deadlock.  based on the patch from Hongli
  Lai in [ruby-core:26783].  [ruby-core:26361]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25842 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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nobu 2009-11-18 09:25:11 +00:00
parent e8c17f1a59
commit 748fe216c2
3 changed files with 26 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Wed Nov 18 18:25:09 2009 Nobuyoshi Nakada <nobu@ruby-lang.org>
* thread.c (rb_thread_atfork_internal): reinitialize global lock
at fork to get rid of deadlock. based on the patch from Hongli
Lai in [ruby-core:26783]. [ruby-core:26361]
Wed Nov 18 17:48:22 2009 Nobuyoshi Nakada <nobu@ruby-lang.org>
* thread.c (terminate_atfork_i): all mutex locks by other threads

19
bootstraptest/test_thread.rb
View file

@ -408,3 +408,22 @@ assert_equal 'ok', %{
require "./zzz.rb"
$result
}
assert_finish 3, %q{
require 'thread'
lock = Mutex.new
cond = ConditionVariable.new
t = Thread.new do
lock.synchronize do
cond.wait(lock)
end
end
pid = fork do
# Child
STDOUT.write "This is the child process.\n"
STDOUT.write "Child process exiting.\n"
end
Process.waitpid(pid)
}, '[ruby-core:26361]'

1
thread.c
View file

@ -2710,6 +2710,7 @@ rb_thread_atfork_internal(int (*atfork)(st_data_t, st_data_t, st_data_t))
VALUE thval = th->self;
vm->main_thread = th;
native_mutex_reinitialize_atfork(&th->vm->global_vm_lock);
st_foreach(vm->living_threads, atfork, (st_data_t)th);
st_clear(vm->living_threads);
st_insert(vm->living_threads, thval, (st_data_t)th->thread_id);