1/*
2 * Copyright (c) 1985, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)abort.c	8.1 (Berkeley) 6/4/93";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include "namespace.h"
37#include <signal.h>
38#include <stdlib.h>
39#include <stddef.h>
40#include <unistd.h>
41#include <pthread.h>
42#include "un-namespace.h"
43
44#include "libc_private.h"
45
46void
47abort(void)
48{
49	struct sigaction act;
50
51	/*
52	 * POSIX requires we flush stdio buffers on abort.
53	 * XXX ISO C requires that abort() be async-signal-safe.
54	 */
55	if (__cleanup)
56		(*__cleanup)();
57
58	sigfillset(&act.sa_mask);
59	/*
60	 * Don't block SIGABRT to give any handler a chance; we ignore
61	 * any errors -- ISO C doesn't allow abort to return anyway.
62	 */
63	sigdelset(&act.sa_mask, SIGABRT);
64	(void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
65	(void)raise(SIGABRT);
66
67	/*
68	 * If SIGABRT was ignored, or caught and the handler returns, do
69	 * it again, only harder.
70	 */
71	act.sa_handler = SIG_DFL;
72	act.sa_flags = 0;
73	sigfillset(&act.sa_mask);
74	(void)__libc_sigaction(SIGABRT, &act, NULL);
75	sigdelset(&act.sa_mask, SIGABRT);
76	(void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
77	(void)raise(SIGABRT);
78	exit(1);
79}
80