Fix nptl/tst-sem4: always start with a fresh semaphore.

2 files changed, 10 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 07aca34..420ce23 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2014-12-15  Torvald Riegel  <triegel@redhat.com>
 
+	* nptl/tst-sem4.c (do_test): Start with a fresh semaphore state.
+
+2014-12-15  Torvald Riegel  <triegel@redhat.com>
+
 	* nptl/tst-mutex5.c (do_test): Do not skip tests if elision is enabled.
 
 2014-12-15  Adhemerval Zanella  <Azanella@linux.vnet.ibm.com>
diff --git a/nptl/tst-sem4.c b/nptl/tst-sem4.c
index 72ed97d..cf9ef27 100644
--- a/nptl/tst-sem4.c
+++ b/nptl/tst-sem4.c
@@ -39,6 +39,12 @@ do_test (void)
   pid_t pid;
   int val;
 
+  /* Start with a clean slate and register a clean-up action.  No need to
+     act if sem_unlink fails because we will catch the same problem during the
+     sem_open below.  */
+  sem_unlink ("/glibc-tst-sem4");
+  on_exit (remove_sem, (void *) "/glibc-tst-sem4");
+
   s = sem_open ("/glibc-tst-sem4", O_CREAT, 0600, 1);
   if (s == SEM_FAILED)
     {
@@ -59,8 +65,6 @@ do_test (void)
       return 1;
     }
 
-  on_exit (remove_sem, (void *) "/glibc-tst-sem4");
-
   /* We have the semaphore object.  Now try again with O_EXCL, this
      should fail.  */
   s2 = sem_open ("/glibc-tst-sem4", O_CREAT | O_EXCL, 0600, 1);