1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1985, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include "namespace.h"
33#include <signal.h>
34#include <stdlib.h>
35#include <stddef.h>
36#include <unistd.h>
37#include <pthread.h>
38#include "un-namespace.h"
39
40#include "libc_private.h"
41
42void
43abort(void)
44{
45	struct sigaction act;
46
47	/*
48	 * POSIX requires we flush stdio buffers on abort.
49	 * XXX ISO C requires that abort() be async-signal-safe.
50	 */
51	if (__cleanup)
52		(*__cleanup)();
53
54	sigfillset(&act.sa_mask);
55	/*
56	 * Don't block SIGABRT to give any handler a chance; we ignore
57	 * any errors -- ISO C doesn't allow abort to return anyway.
58	 */
59	sigdelset(&act.sa_mask, SIGABRT);
60	(void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
61	(void)raise(SIGABRT);
62
63	/*
64	 * If SIGABRT was ignored, or caught and the handler returns, do
65	 * it again, only harder.
66	 */
67	act.sa_handler = SIG_DFL;
68	act.sa_flags = 0;
69	sigfillset(&act.sa_mask);
70	(void)__libc_sigaction(SIGABRT, &act, NULL);
71	sigdelset(&act.sa_mask, SIGABRT);
72	(void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
73	(void)raise(SIGABRT);
74	exit(1);
75}
76