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 /* temporary, for bug hunting */
38 #include "logd.h"
39 #define debug_log(format, ...) \
40 __libc_android_log_print(ANDROID_LOG_DEBUG, "libc-abort", (format), ##__VA_ARGS__ )
41
42 void
abort(void)43 abort(void)
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 debug_log("abort() called in pid %d\n", getpid());
77 /* seg fault seems to produce better debuggerd results than SIGABRT */
78 *((char*)0xdeadbaad) = 39;
79 debug_log("somehow we're not dead?\n");
80 /* -- */
81
82 (void)kill(getpid(), SIGABRT);
83
84 /*
85 * if SIGABRT ignored, or caught and the handler returns, do
86 * it again, only harder.
87 */
88 {
89 struct sigaction sa;
90
91 sa.sa_handler = SIG_DFL;
92 sa.sa_flags = SA_RESTART;
93 sigemptyset(&sa.sa_mask);
94
95 (void)sigaction( SIGABRT, &sa, &sa );
96 }
97
98 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
99 (void)kill(getpid(), SIGABRT);
100 _exit(1);
101 }
102