1 files changed, 99 insertions, 0 deletions
diff --git a/sysdeps/pthread/tst-sem15.c b/sysdeps/pthread/tst-sem15.c
new file mode 100644
index 0000000000..9a9a93eb32
--- /dev/null
+++ b/sysdeps/pthread/tst-sem15.c
@@ -0,0 +1,99 @@
+/* Test for SEM_VALUE_MAX overflow detection: BZ #18434.
+   Copyright (C) 2015-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <limits.h>
+#include <semaphore.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static int
+do_test (void)
+{
+  sem_t s;
+
+  if (sem_init (&s, 0, SEM_VALUE_MAX))
+    {
+      printf ("sem_init: %m\n");
+      return 1;
+    }
+
+  int result = 0;
+
+  int value = 0xdeadbeef;
+  if (sem_getvalue (&s, &value))
+    {
+      printf ("sem_getvalue: %m\n");
+      result = 1;
+    }
+  else
+    {
+      printf ("sem_getvalue after init: %d\n", value);
+      if (value != SEM_VALUE_MAX)
+	{
+	  printf ("\tshould be %d\n", SEM_VALUE_MAX);
+	  result = 1;
+	}
+    }
+
+  errno = 0;
+  if (sem_post(&s) == 0)
+    {
+      puts ("sem_post at SEM_VALUE_MAX succeeded!");
+      result = 1;
+    }
+  else
+    {
+      printf ("sem_post at SEM_VALUE_MAX: %m (%d)\n", errno);
+      if (errno != EOVERFLOW)
+	{
+	  printf ("\tshould be %s (EOVERFLOW = %d)\n",
+		  strerror (EOVERFLOW), EOVERFLOW);
+	  result = 1;
+	}
+    }
+
+  value = 0xbad1d00d;
+  if (sem_getvalue (&s, &value))
+    {
+      printf ("sem_getvalue: %m\n");
+      result = 1;
+    }
+  else
+    {
+      printf ("sem_getvalue after post: %d\n", value);
+      if (value != SEM_VALUE_MAX)
+	{
+	  printf ("\tshould be %d\n", SEM_VALUE_MAX);
+	  result = 1;
+	}
+    }
+
+  if (sem_destroy (&s))
+    {
+      printf ("sem_destroy: %m\n");
+      result = 1;
+    }
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"