1 /* $OpenBSD: abort.c,v 1.14 2005/08/08 08:05:36 espie Exp $ */
2 /*
3 * Copyright (c) 1985 Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <signal.h>
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include "thread_private.h"
35 #include "atexit.h"
36
37 #ifdef __arm__
38 __LIBC_HIDDEN__ void
__libc_android_abort(void)39 __libc_android_abort(void)
40 #else
41 void
42 abort(void)
43 #endif
44 {
45 struct atexit *p = __atexit;
46 static int cleanup_called = 0;
47 sigset_t mask;
48
49
50 sigfillset(&mask);
51 /*
52 * don't block SIGABRT to give any handler a chance; we ignore
53 * any errors -- X311J doesn't allow abort to return anyway.
54 */
55 sigdelset(&mask, SIGABRT);
56 /* temporary, so deliberate seg fault can be caught by debuggerd */
57 sigdelset(&mask, SIGSEGV);
58 /* -- */
59 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
60
61 /*
62 * POSIX requires we flush stdio buffers on abort
63 */
64 if (cleanup_called == 0) {
65 while (p != NULL && p->next != NULL)
66 p = p->next;
67 /* the check for fn_dso == NULL is mostly paranoia */
68 if (p != NULL && p->fns[0].fn_dso == NULL &&
69 p->fns[0].fn_ptr.std_func != NULL) {
70 cleanup_called = 1;
71 (*p->fns[0].fn_ptr.std_func)();
72 }
73 }
74
75 /* temporary, for bug hunting */
76 /* seg fault seems to produce better debuggerd results than SIGABRT */
77 #ifdef __mips__
78 /* An access that will generate SIGSEGV rather than SIGBUS. */
79 *((char*)0xdeadc0c0) = 39;
80 #else
81 *((char*)0xdeadbaad) = 39;
82 #endif
83 /* -- */
84
85 (void)kill(getpid(), SIGABRT);
86
87 /*
88 * if SIGABRT ignored, or caught and the handler returns, do
89 * it again, only harder.
90 */
91 {
92 struct sigaction sa;
93
94 sa.sa_handler = SIG_DFL;
95 sa.sa_flags = SA_RESTART;
96 sigemptyset(&sa.sa_mask);
97
98 (void)sigaction( SIGABRT, &sa, &sa );
99 }
100
101 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
102 (void)kill(getpid(), SIGABRT);
103 _exit(1);
104 }
105