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[Bug gcov-profile/49484] gcov crash if two(or more) forks happen at the same time
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 17 Jan 2012 14:39:47 +0000
- Subject: [Bug gcov-profile/49484] gcov crash if two(or more) forks happen at the same time
- Auto-submitted: auto-generated
- References: <bug-49484-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49484
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-17 14:39:47 UTC ---
It doesn't really help - there are more races. The following does seem
to help though, but is certainly not applicable.
Index: gcc/libgcov.c
===================================================================
--- gcc/libgcov.c (revision 183243)
+++ gcc/libgcov.c (working copy)
@@ -77,6 +77,7 @@ void __gcov_merge_delta (gcov_type *coun
#include <errno.h>
#include <sys/stat.h>
#endif
+#include <pthread.h>
#ifdef L_gcov
#include "gcov-io.c"
@@ -584,7 +585,9 @@ void
__gcov_flush (void)
{
const struct gcov_info *gi_ptr;
+ static pthread_mutex_t mx = PTHREAD_MUTEX_INITIALIZER;
+ pthread_mutex_lock (&mx);
gcov_exit ();
for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
{
@@ -598,6 +601,7 @@ __gcov_flush (void)
ci_ptr++;
}
}
+ pthread_mutex_unlock (&mx);
}
#endif /* L_gcov */