1 /* $NetBSD: abort.c,v 1.15 2012/06/08 11:15:26 abs Exp $ */ 2 3 /* 4 * Copyright (c) 1985, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: abort.c,v 1.15 2012/06/08 11:15:26 abs Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <signal.h> 43 #include <stdlib.h> 44 #include <unistd.h> 45 46 extern void (*__cleanup)(void); 47 static int aborting = 0; 48 49 void 50 abort(void) 51 { 52 sigset_t mask; 53 54 sigfillset(&mask); 55 /* 56 * don't block SIGABRT to give any handler a chance; we ignore 57 * any errors -- X311J doesn't allow abort to return anyway. 58 */ 59 sigdelset(&mask, SIGABRT); 60 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL); 61 62 /* 63 * POSIX.1 requires that stdio buffers be flushed on abort. 64 * We ensure the cleanup routines are only called once in 65 * case the user calls abort() in a SIGABRT handler. 66 */ 67 if (!aborting) { 68 aborting = 1; 69 70 if (__cleanup) 71 (*__cleanup)(); 72 } 73 74 (void)raise(SIGABRT); 75 76 /* 77 * if SIGABRT ignored, or caught and the handler returns, do 78 * it again, only harder. 79 */ 80 (void)signal(SIGABRT, SIG_DFL); 81 (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL); 82 (void)raise(SIGABRT); 83 _exit(1); 84 } 85