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 * @(#)abort.c 8.1 (Berkeley) 6/4/93 30 * $FreeBSD: src/lib/libc/stdlib/abort.c,v 1.11 2007/01/09 00:28:09 imp Exp $ 31 * $DragonFly: src/lib/libc/stdlib/abort.c,v 1.4 2005/11/20 12:37:48 swildner Exp $ 32 */ 33 34 #include "namespace.h" 35 #include <signal.h> 36 #include <stdlib.h> 37 #include <stddef.h> 38 #include <unistd.h> 39 #include <pthread.h> 40 #include "un-namespace.h" 41 42 #include "libc_private.h" 43 44 void 45 abort(void) 46 { 47 struct sigaction act; 48 49 /* 50 * POSIX requires we flush stdio buffers on abort. 51 * XXX ISO C requires that abort() be async-signal-safe. 52 */ 53 if (__cleanup) 54 (*__cleanup)(); 55 56 sigfillset(&act.sa_mask); 57 /* 58 * Don't block SIGABRT to give any handler a chance; we ignore 59 * any errors -- ISO C doesn't allow abort to return anyway. 60 */ 61 sigdelset(&act.sa_mask, SIGABRT); 62 _sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 63 raise(SIGABRT); 64 65 /* 66 * If SIGABRT was ignored, or caught and the handler returns, do 67 * it again, only harder. 68 */ 69 act.sa_handler = SIG_DFL; 70 act.sa_flags = 0; 71 sigfillset(&act.sa_mask); 72 _sigaction(SIGABRT, &act, NULL); 73 sigdelset(&act.sa_mask, SIGABRT); 74 _sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 75 raise(SIGABRT); 76 exit(1); 77 } 78