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 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93";
34 #endif /* LIBC_SCCS and not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include "namespace.h"
39 #include <signal.h>
40 #include <stdlib.h>
41 #include <stddef.h>
42 #include <unistd.h>
43 #include <pthread.h>
44 #include "un-namespace.h"
45
46 #include "libc_private.h"
47
48 void
abort(void)49 abort(void)
50 {
51 struct sigaction act;
52
53 /*
54 * POSIX requires we flush stdio buffers on abort.
55 * XXX ISO C requires that abort() be async-signal-safe.
56 */
57 if (__cleanup)
58 (*__cleanup)();
59
60 sigfillset(&act.sa_mask);
61 /*
62 * Don't block SIGABRT to give any handler a chance; we ignore
63 * any errors -- ISO C doesn't allow abort to return anyway.
64 */
65 sigdelset(&act.sa_mask, SIGABRT);
66 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
67 (void)raise(SIGABRT);
68
69 /*
70 * If SIGABRT was ignored, or caught and the handler returns, do
71 * it again, only harder.
72 */
73 act.sa_handler = SIG_DFL;
74 act.sa_flags = 0;
75 sigfillset(&act.sa_mask);
76 (void)__libc_sigaction(SIGABRT, &act, NULL);
77 sigdelset(&act.sa_mask, SIGABRT);
78 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
79 (void)raise(SIGABRT);
80 exit(1);
81 }
82