1 files changed, 102 insertions, 0 deletions
diff --git a/htl/tests/test-4.c b/htl/tests/test-4.c
new file mode 100644
index 0000000000..b8c24b78f1
--- /dev/null
+++ b/htl/tests/test-4.c
@@ -0,0 +1,102 @@
+/* Test the stack guard.
+   Copyright (C) 2000-2018 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#define _GNU_SOURCE
+
+#include <pthread.h>
+#include <assert.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+size_t stacksize;
+
+void *
+thr (void *arg)
+{
+  int i;
+  char *foo;
+
+  foo = alloca (3 * stacksize / 4);
+  for (i = 0; i < sizeof foo; i++)
+    foo[i] = -1;
+
+  return (void *) 1;
+}
+
+int
+main (int argc, char *argv[])
+{
+  error_t err;
+  pid_t child;
+
+  child = fork ();
+  switch (child)
+    {
+    case -1:
+      error (1, errno, "fork");
+      break;
+
+    case 0:
+      {
+	pthread_attr_t attr;
+	pthread_t tid;
+	void *ret;
+
+	err = pthread_attr_init (&attr);
+	assert_perror (err);
+
+	err = pthread_attr_getstacksize (&attr, &stacksize);
+	assert_perror (err);
+
+	err = pthread_attr_setguardsize (&attr, stacksize / 2);
+	if (err == ENOTSUP)
+	  {
+	    printf ("Stack guard attribute not supported.\n");
+	    return 1;
+	  }
+	assert_perror (err);
+
+	err = pthread_create (&tid, &attr, thr, 0);
+	assert_perror (err);
+
+	err = pthread_attr_destroy (&attr);
+	assert_perror (err);
+
+	err = pthread_join (tid, &ret);
+	/* Should never be successful.  */
+	printf ("Thread did not segfault!?!\n");
+	assert_perror (err);
+	return 0;
+      }
+
+    default:
+      {
+	pid_t pid;
+	int status;
+
+	pid = waitpid (child, &status, 0);
+	printf ("pid = %d; child = %d; status = %d\n", pid, child, status);
+	assert (pid == child);
+	assert (status != 0);
+      }
+    }
+
+  return 0;
+}