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authorTill Strauman <strauman@slac.stanford.edu>2013-12-17 17:42:53 -0600
committerGedare Bloom <gedare@rtems.org>2014-04-11 15:40:16 -0400
commit907cfb1e2fa46fed0d0812dc4295d91bfbe01892 (patch)
treea054d6fd55fbb65da34b7990f580c9080295d157
parentrtems_cache_invalidate_multiple_instruction_lines (diff)
downloadrtems-907cfb1e2fa46fed0d0812dc4295d91bfbe01892.tar.bz2
posix: fix race condition between pthread_create and capture engine
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.
-rw-r--r--cpukit/posix/src/pthreadcreate.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/cpukit/posix/src/pthreadcreate.c b/cpukit/posix/src/pthreadcreate.c
index c5ca86d52e..054261b5ef 100644
--- a/cpukit/posix/src/pthreadcreate.c
+++ b/cpukit/posix/src/pthreadcreate.c
@@ -198,6 +198,8 @@ int pthread_create(
*/
the_thread->do_post_task_switch_extension = true;
+ _Thread_Disable_dispatch();
+
/*
* POSIX threads are allocated and started in one operation.
*/
@@ -217,6 +219,7 @@ int pthread_create(
* thread while we are creating it.
*/
if ( !status ) {
+ _Thread_Enable_dispatch();
_POSIX_Threads_Free( the_thread );
_RTEMS_Unlock_allocator();
return EINVAL;
@@ -230,6 +233,8 @@ int pthread_create(
);
}
+ _Thread_Enable_dispatch();
+
/*
* Return the id and indicate we successfully created the thread
*/