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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: src/lib/libc/stdlib/abort.c,v 1.5.6.2 2002/10/15 19:46:46 fjoe Exp $ 34 * $DragonFly: src/lib/libc/stdlib/abort.c,v 1.4 2005/11/20 12:37:48 swildner Exp $ 35 * 36 * @(#)abort.c 8.1 (Berkeley) 6/4/93 37 */ 38 39 #include <signal.h> 40 #include <stdlib.h> 41 #include <stddef.h> 42 #include <unistd.h> 43 #include <pthread.h> 44 45 void (*__cleanup)(); 46 47 extern int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 48 extern int __sys_sigaction(int, const struct sigaction *, 49 struct sigaction *); 50 51 void 52 abort(void) 53 { 54 struct sigaction act; 55 56 /* 57 * POSIX requires we flush stdio buffers on abort 58 */ 59 if (__cleanup) 60 (*__cleanup)(); 61 62 sigfillset(&act.sa_mask); 63 /* 64 * don't block SIGABRT to give any handler a chance; we ignore 65 * any errors -- X311J doesn't allow abort to return anyway. 66 */ 67 sigdelset(&act.sa_mask, SIGABRT); 68 __sys_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 69 kill(getpid(), SIGABRT); 70 71 /* 72 * if SIGABRT ignored, or caught and the handler returns, do 73 * it again, only harder. 74 */ 75 act.sa_handler = SIG_DFL; 76 act.sa_flags = 0; 77 sigfillset(&act.sa_mask); 78 __sys_sigaction(SIGABRT, &act, NULL); 79 sigdelset(&act.sa_mask, SIGABRT); 80 __sys_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 81 kill(getpid(), SIGABRT); 82 exit(1); 83 } 84 85