abort.c revision 150040 
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. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)abort.c	8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/lib/libc/stdlib/abort.c 150040 2005-09-12 13:46:32Z stefanf $");
39
40#include "namespace.h"
41#include <signal.h>
42#include <stdlib.h>
43#include <stddef.h>
44#include <unistd.h>
45#include <pthread.h>
46#include "un-namespace.h"
47
48#include "libc_private.h"
49
50void
51abort()
52{
53	struct sigaction act;
54
55	/*
56	 * POSIX requires we flush stdio buffers on abort.
57	 * XXX ISO C requires that abort() be async-signal-safe.
58	 */
59	if (__cleanup)
60		(*__cleanup)();
61
62	sigfillset(&act.sa_mask);
63	/*
64	 * Don't block SIGABRT to give any handler a chance; we ignore
65	 * any errors -- ISO C doesn't allow abort to return anyway.
66	 */
67	sigdelset(&act.sa_mask, SIGABRT);
68	(void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
69	(void)raise(SIGABRT);
70
71	/*
72	 * If SIGABRT was ignored, or caught and the handler returns, do
73	 * it again, only harder.
74	 */
75	act.sa_handler = SIG_DFL;
76	act.sa_flags = 0;
77	sigfillset(&act.sa_mask);
78	(void)_sigaction(SIGABRT, &act, NULL);
79	sigdelset(&act.sa_mask, SIGABRT);
80	(void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
81	(void)raise(SIGABRT);
82	exit(1);
83}
84