Fix nptl semaphore cleanup invocation.

1 files changed, 15 insertions, 9 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/sem_wait.c b/nptl/sysdeps/unix/sysv/linux/sem_wait.c
index 20e2b481df..602c38246f 100644
--- a/nptl/sysdeps/unix/sysv/linux/sem_wait.c
+++ b/nptl/sysdeps/unix/sysv/linux/sem_wait.c
@@ -37,6 +37,20 @@ __sem_wait_cleanup (void *arg)
   atomic_decrement (&isem->nwaiters);
 }
 
+/* This is in a seperate function in order to make sure gcc
+   puts the call site into an exception region, and thus the
+   cleanups get properly run.  */
+static int
+__attribute__ ((noinline))
+do_futex_wait (struct new_sem *isem)
+{
+  int err, oldtype = __pthread_enable_asynccancel ();
+
+  err = lll_futex_wait (&isem->value, 0, isem->private ^ FUTEX_PRIVATE_FLAG);
+
+  __pthread_disable_asynccancel (oldtype);
+  return err;
+}
 
 int
 __new_sem_wait (sem_t *sem)
@@ -53,15 +67,7 @@ __new_sem_wait (sem_t *sem)
 
   while (1)
     {
-      /* Enable asynchronous cancellation.  Required by the standard.  */
-      int oldtype = __pthread_enable_asynccancel ();
-
-      err = lll_futex_wait (&isem->value, 0,
-			    isem->private ^ FUTEX_PRIVATE_FLAG);
-
-      /* Disable asynchronous cancellation.  */
-      __pthread_disable_asynccancel (oldtype);
-
+      err = do_futex_wait(isem);
       if (err != 0 && err != -EWOULDBLOCK)
 	{
 	  __set_errno (-err);