Author: davidxu
Date: Wed Sep 1 03:55:10 2010
New Revision: 212078
URL: http://svn.freebsd.org/changeset/base/212078
Log:
pthread_atfork should acquire writer lock and protect the code
with critical region.
Modified:
head/lib/libthr/thread/thr_fork.c
Modified: head/lib/libthr/thread/thr_fork.c
==============================================================================
--- head/lib/libthr/thread/thr_fork.c Wed Sep 1 03:11:21 2010
(r212077)
+++ head/lib/libthr/thread/thr_fork.c Wed Sep 1 03:55:10 2010
(r212078)
@@ -89,9 +89,11 @@ _pthread_atfork(void (*prepare)(void), v
af->prepare = prepare;
af->parent = parent;
af->child = child;
- _thr_rwl_rdlock(&_thr_atfork_lock);
+ THR_CRITICAL_ENTER(curthread);
+ _thr_rwl_wrlock(&_thr_atfork_lock);
TAILQ_INSERT_TAIL(&_thr_atfork_list, af, qe);
_thr_rwl_unlock(&_thr_atfork_lock);
+ THR_CRITICAL_LEAVE(curthread);
return (0);
}
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