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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if defined(LIBC_SCCS) && !defined(lint) 31static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93"; 32#endif /* LIBC_SCCS and not lint */ 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: src/lib/libc/stdlib/abort.c,v 1.11 2007/01/09 00:28:09 imp Exp $"); 35 36#include "namespace.h" 37#include <signal.h> 38#include <stdarg.h> 39#include <stdlib.h> 40#include <stddef.h> 41#include <unistd.h> 42#include <pthread.h> 43#include <pthread_workqueue.h> 44#include "un-namespace.h" 45 46#include "libc_private.h" 47 48#include <CrashReporterClient.h> 49#include "_simple.h" 50 51extern void (*__cleanup)(); 52extern void __abort(void) __dead2; 53 54#define TIMEOUT 10000 /* 10 milliseconds */ 55 56void 57abort() 58{ 59 struct sigaction act; 60 61 if (!CRGetCrashLogMessage()) 62 CRSetCrashLogMessage("abort() called"); 63 64 /* 65 * POSIX requires we flush stdio buffers on abort. 66 * XXX ISO C requires that abort() be async-signal-safe. 67 */ 68 if (__cleanup) 69 (*__cleanup)(); 70 71 sigfillset(&act.sa_mask); 72 /* 73 * Don't block SIGABRT to give any handler a chance; we ignore 74 * any errors -- ISO C doesn't allow abort to return anyway. 75 */ 76 sigdelset(&act.sa_mask, SIGABRT); 77 78 /* <rdar://problem/7397932> abort() should call pthread_kill to deliver a signal to the aborting thread 79 * This helps gdb focus on the thread calling abort() 80 */ 81 82 /* Block all signals on all other threads */ 83 sigset_t fullmask; 84 sigfillset(&fullmask); 85 (void)_sigprocmask(SIG_SETMASK, &fullmask, NULL); 86 87 /* <rdar://problem/8400096> Set the workqueue killable */ 88 __pthread_workqueue_setkill(1); 89 90 (void)pthread_sigmask(SIG_SETMASK, &act.sa_mask, NULL); 91 (void)pthread_kill(pthread_self(), SIGABRT); 92 93 usleep(TIMEOUT); /* give time for signal to happen */ 94 95 /* 96 * If SIGABRT was ignored, or caught and the handler returns, do 97 * it again, only harder. 98 */ 99 __abort(); 100} 101 102__private_extern__ void 103__abort() 104{ 105 struct sigaction act; 106 107 if (!CRGetCrashLogMessage()) 108 CRSetCrashLogMessage("__abort() called"); 109 act.sa_handler = SIG_DFL; 110 act.sa_flags = 0; 111 sigfillset(&act.sa_mask); 112 (void)_sigaction(SIGABRT, &act, NULL); 113 sigdelset(&act.sa_mask, SIGABRT); 114 115 /* <rdar://problem/7397932> abort() should call pthread_kill to deliver a signal to the aborting thread 116 * This helps gdb focus on the thread calling abort() 117 */ 118 119 /* Block all signals on all other threads */ 120 sigset_t fullmask; 121 sigfillset(&fullmask); 122 (void)_sigprocmask(SIG_SETMASK, &fullmask, NULL); 123 124 /* <rdar://problem/8400096> Set the workqueue killable */ 125 __pthread_workqueue_setkill(1); 126 127 (void)pthread_sigmask(SIG_SETMASK, &act.sa_mask, NULL); 128 (void)pthread_kill(pthread_self(), SIGABRT); 129 130 usleep(TIMEOUT); /* give time for signal to happen */ 131 132 /* If for some reason SIGABRT was not delivered, we exit using __builtin_trap 133 * which generates an illegal instruction on i386: <rdar://problem/8400958> 134 * and SIGTRAP on arm. 135 */ 136 sigfillset(&act.sa_mask); 137 sigdelset(&act.sa_mask, SIGILL); 138 sigdelset(&act.sa_mask, SIGTRAP); 139 (void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 140 __builtin_trap(); 141} 142 143__private_extern__ void 144abort_report_np(const char *fmt, ...) 145{ 146 _SIMPLE_STRING s; 147 va_list ap; 148 149 if ((s = _simple_salloc()) != NULL) { 150 va_start(ap, fmt); 151 _simple_vsprintf(s, fmt, ap); 152 va_end(ap); 153 CRSetCrashLogMessage(_simple_string(s)); 154 } else 155 CRSetCrashLogMessage(fmt); /* the format string is better than nothing */ 156 abort(); 157} 158