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posix: fix race condition between pthread_create and capture engine

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Fix PR 2068:
Reproducable crashes occur when using pthreads and the capture engine
at the same time. 'pthread_create()' is the culprit. It creates a SCORE thread
and then calls Thread_Start( ) without disabling thread-dispatching.
This commit is contained in:
Till Strauman
2013-12-17 17:42:53 -06:00
committed by Gedare Bloom
parent fc48ad84c7
commit 907cfb1e2f
1 changed files with 5 additions and 0 deletions
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5
cpukit/posix/src/pthreadcreate.c
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@@ -198,6 +198,8 @@ int pthread_create(
*/ */
the_thread->do_post_task_switch_extension = true; the_thread->do_post_task_switch_extension = true;
_Thread_Disable_dispatch();
/* /*
* POSIX threads are allocated and started in one operation. * POSIX threads are allocated and started in one operation.
*/ */
@@ -217,6 +219,7 @@ int pthread_create(
* thread while we are creating it. * thread while we are creating it.
*/ */
if ( !status ) { if ( !status ) {
_Thread_Enable_dispatch();
_POSIX_Threads_Free( the_thread ); _POSIX_Threads_Free( the_thread );
_RTEMS_Unlock_allocator(); _RTEMS_Unlock_allocator();
return EINVAL; return EINVAL;
@@ -230,6 +233,8 @@ int pthread_create(
); );
} }
_Thread_Enable_dispatch();
/* /*
* Return the id and indicate we successfully created the thread * Return the id and indicate we successfully created the thread
*/ */