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. 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 */ 32 33 #include "namespace.h" 34 #include <signal.h> 35 #include <stdlib.h> 36 #include <stddef.h> 37 #include <unistd.h> 38 #include "un-namespace.h" 39 40 #include "libc_private.h" 41 42 void 43 abort(void) 44 { 45 struct sigaction act; 46 47 /* 48 * POSIX requires we flush stdio buffers on abort. 49 * XXX ISO C requires that abort() be async-signal-safe. 50 */ 51 if (__cleanup) 52 (*__cleanup)(); 53 54 sigfillset(&act.sa_mask); 55 /* 56 * Don't block SIGABRT to give any handler a chance; we ignore 57 * any errors -- ISO C doesn't allow abort to return anyway. 58 */ 59 sigdelset(&act.sa_mask, SIGABRT); 60 _sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 61 raise(SIGABRT); 62 63 /* 64 * If SIGABRT was ignored, or caught and the handler returns, do 65 * it again, only harder. 66 */ 67 act.sa_handler = SIG_DFL; 68 act.sa_flags = 0; 69 sigfillset(&act.sa_mask); 70 _sigaction(SIGABRT, &act, NULL); 71 sigdelset(&act.sa_mask, SIGABRT); 72 _sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 73 raise(SIGABRT); 74 exit(1); 75 } 76