33574c17ee
Contributed by Agustina Arzille <avarzille@riseup.net> Amos Jeffries <squid3@treenet.co.nz> David Michael <fedora.dm0@gmail.com> Marco Gerards <marco@gnu.org> Marcus Brinkmann <marcus@gnu.org> Neal H. Walfield <neal@gnu.org> Pino Toscano <toscano.pino@tiscali.it> Richard Braun <rbraun@sceen.net> Roland McGrath <roland@gnu.org> Samuel Thibault <samuel.thibault@ens-lyon.org> Thomas DiModica <ricinwich@yahoo.com> Thomas Schwinge <tschwinge@gnu.org> * htl: New directory. * sysdeps/htl: New directory. * sysdeps/hurd/htl: New directory. * sysdeps/i386/htl: New directory. * sysdeps/mach/htl: New directory. * sysdeps/mach/hurd/htl: New directory. * sysdeps/mach/hurd/i386/htl: New directory. * nscd/Depend, resolv/Depend, rt/Depend: Add htl dependency. * sysdeps/mach/hurd/i386/Implies: Add mach/hurd/i386/htl imply. * sysdeps/mach/hurd/i386/libpthread.abilist: New file.
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/* Test the stack guard.
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Copyright (C) 2000-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <http://www.gnu.org/licenses/>. */
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#define _GNU_SOURCE
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#include <pthread.h>
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#include <assert.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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size_t stacksize;
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void *
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thr (void *arg)
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{
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int i;
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char *foo;
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foo = alloca (3 * stacksize / 4);
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for (i = 0; i < sizeof foo; i++)
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foo[i] = -1;
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return (void *) 1;
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}
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int
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main (int argc, char *argv[])
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{
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error_t err;
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pid_t child;
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child = fork ();
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switch (child)
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{
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case -1:
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error (1, errno, "fork");
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break;
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case 0:
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{
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pthread_attr_t attr;
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pthread_t tid;
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void *ret;
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err = pthread_attr_init (&attr);
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assert_perror (err);
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err = pthread_attr_getstacksize (&attr, &stacksize);
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assert_perror (err);
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err = pthread_attr_setguardsize (&attr, stacksize / 2);
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if (err == ENOTSUP)
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{
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printf ("Stack guard attribute not supported.\n");
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return 1;
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}
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assert_perror (err);
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err = pthread_create (&tid, &attr, thr, 0);
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assert_perror (err);
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err = pthread_attr_destroy (&attr);
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assert_perror (err);
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err = pthread_join (tid, &ret);
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/* Should never be successful. */
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printf ("Thread did not segfault!?!\n");
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assert_perror (err);
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return 0;
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}
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default:
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{
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pid_t pid;
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int status;
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pid = waitpid (child, &status, 0);
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printf ("pid = %d; child = %d; status = %d\n", pid, child, status);
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assert (pid == child);
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assert (status != 0);
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}
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}
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return 0;
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}
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