1 /* $NetBSD: abort.c,v 1.15 2012/06/08 11:15:26 abs Exp $ */
2
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 <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 #if 0
35 static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93";
36 #else
37 __RCSID("$NetBSD: abort.c,v 1.15 2012/06/08 11:15:26 abs Exp $");
38 #endif
39 #endif /* LIBC_SCCS and not lint */
40
41 #include "namespace.h"
42 #include <signal.h>
43 #include <stdlib.h>
44 #include <unistd.h>
45
46 extern void (*__cleanup)(void);
47 static int aborting = 0;
48
49 void
abort(void)50 abort(void)
51 {
52 sigset_t mask;
53
54 sigfillset(&mask);
55 /*
56 * don't block SIGABRT to give any handler a chance; we ignore
57 * any errors -- X311J doesn't allow abort to return anyway.
58 */
59 sigdelset(&mask, SIGABRT);
60 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
61
62 /*
63 * POSIX.1 requires that stdio buffers be flushed on abort.
64 * We ensure the cleanup routines are only called once in
65 * case the user calls abort() in a SIGABRT handler.
66 */
67 if (!aborting) {
68 aborting = 1;
69
70 if (__cleanup)
71 (*__cleanup)();
72 }
73
74 (void)raise(SIGABRT);
75
76 /*
77 * if SIGABRT ignored, or caught and the handler returns, do
78 * it again, only harder.
79 */
80 (void)signal(SIGABRT, SIG_DFL);
81 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
82 (void)raise(SIGABRT);
83 _exit(1);
84 }
85