1 files changed, 43 insertions, 0 deletions
diff --git a/stdlib/test-errno-printer.c b/stdlib/test-errno-printer.c
new file mode 100644
index 0000000000..da2345f188
--- /dev/null
+++ b/stdlib/test-errno-printer.c
@@ -0,0 +1,43 @@
+/* Helper program for testing the errno pretty-printer.
+   Copyright (C) 2017 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
+   <http://www.gnu.org/licenses/>.  */
+
+#define _GNU_SOURCE 1
+#include <errno.h>
+#include <stdlib.h>
+#include <limits.h>
+
+#define PASS 0
+#define FAIL 1
+
+const error_t array_of_error_t[3] = { 0, ERANGE, -2 };
+
+__thread int ensure_gdb_can_read_thread_variables = 0;
+
+int
+main (void)
+{
+  int result = PASS;
+  errno = array_of_error_t[0];
+  unsigned long x = strtoul("9999999999999999999999999999999999999", 0, 10);
+  if (x != ULONG_MAX)
+    result = FAIL;
+  if (errno != ERANGE)
+    result = FAIL;
+  errno = -2; /* Break: test errno 2 */
+  return result;
+}