Check result of pthread_mutex_unlock in specific.c

* specific.c [USE_CUSTOM_SPECIFIC] (GC_setspecific,
GC_remove_specific_after_fork): Call ABORT if pthread_mutex_unlock()
fails.

1 files changed, 4 insertions, 2 deletions

diff --git a/specific.c b/specific.c
index 624236fd..451cf908 100644
--- a/specific.c
+++ b/specific.c
@@ -72,7 +72,8 @@ GC_INNER int GC_setspecific(tsd * key, void * value)
     AO_store_release(&key->hash[hash_val].ao, (AO_t)entry);
     GC_dirty((/* no volatile */ void *)entry);
     GC_dirty(key->hash + hash_val);
-    pthread_mutex_unlock(&(key -> lock));
+    if (pthread_mutex_unlock(&key->lock) != 0)
+      ABORT("pthread_mutex_unlock failed (setspecific)");
     return 0;
 }
 
@@ -128,7 +129,8 @@ GC_INNER void GC_remove_specific_after_fork(tsd * key, pthread_t t)
     /* With GC, we're done, since the pointers from the cache will      */
     /* be overwritten, all local pointers to the entries will be        */
     /* dropped, and the entry will then be reclaimed.                   */
-    pthread_mutex_unlock(&(key -> lock));
+    if (pthread_mutex_unlock(&key->lock) != 0)
+      ABORT("pthread_mutex_unlock failed (remove_specific after fork)");
 }
 
 /* Note that even the slow path doesn't lock.   */