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 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <signal.h> 41 #include <stdlib.h> 42 #include <stddef.h> 43 #include <unistd.h> 44 #include <pthread.h> 45 46 void (*__cleanup)(); 47 48 /* XXX - why are these declarations here? */ 49 extern int __sys_sigprocmask(int, const sigset_t *, sigset_t *); 50 extern int __sys_sigaction(int, const struct sigaction *, 51 struct sigaction *); 52 53 void 54 abort() 55 { 56 struct sigaction act; 57 58 /* 59 * POSIX requires we flush stdio buffers on abort. 60 * XXX ISO C requires that abort() be async-signal-safe. 61 */ 62 if (__cleanup) 63 (*__cleanup)(); 64 65 sigfillset(&act.sa_mask); 66 /* 67 * Don't block SIGABRT to give any handler a chance; we ignore 68 * any errors -- ISO C doesn't allow abort to return anyway. 69 */ 70 sigdelset(&act.sa_mask, SIGABRT); 71 (void)__sys_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 72 (void)kill(getpid(), SIGABRT); 73 74 /* 75 * If SIGABRT was ignored, or caught and the handler returns, do 76 * it again, only harder. 77 */ 78 act.sa_handler = SIG_DFL; 79 act.sa_flags = 0; 80 sigfillset(&act.sa_mask); 81 (void)__sys_sigaction(SIGABRT, &act, NULL); 82 sigdelset(&act.sa_mask, SIGABRT); 83 (void)__sys_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 84 (void)kill(getpid(), SIGABRT); 85 exit(1); 86 } 87