In parallel.c, if HAVE_SYNC_BUILTINS is #undef'ed, then GOMP_parallel_end uses
a mutex to atomically modify the team->nthreads field. The mutex that is used
to atomically write to nthreads is locked but never unlocked.
parallel.c, GOMP_parallel_end:
#ifdef HAVE_SYNC_BUILTINS
__sync_fetch_and_add (&gomp_remaining_threads_count,
1UL - team->nthreads);
#else
gomp_mutex_lock (&gomp_remaining_threads_lock);
gomp_remaining_threads_count -= team->nthreads - 1;
#endif
--
Summary: parallel.c: GOMP_parallel_end locks a mutex but fails to
unlock it after atomic operation complete
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: shreyasp at ti dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45240
