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-rw-r--r--htl/tests/test-4.c102
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..e6e06aacf4
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+++ b/htl/tests/test-4.c
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+/* 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 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
+
+#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;
+}