1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include "namespace.h" 39 #include <signal.h> 40 #include <stdlib.h> 41 #include <stddef.h> 42 #include <unistd.h> 43 #include <pthread.h> 44 #include "un-namespace.h" 45 46 #include "libc_private.h" 47 48 void 49 abort(void) 50 { 51 struct sigaction act; 52 53 /* 54 * POSIX requires we flush stdio buffers on abort. 55 * XXX ISO C requires that abort() be async-signal-safe. 56 */ 57 if (__cleanup) 58 (*__cleanup)(); 59 60 sigfillset(&act.sa_mask); 61 /* 62 * Don't block SIGABRT to give any handler a chance; we ignore 63 * any errors -- ISO C doesn't allow abort to return anyway. 64 */ 65 sigdelset(&act.sa_mask, SIGABRT); 66 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 67 (void)raise(SIGABRT); 68 69 /* 70 * If SIGABRT was ignored, or caught and the handler returns, do 71 * it again, only harder. 72 */ 73 act.sa_handler = SIG_DFL; 74 act.sa_flags = 0; 75 sigfillset(&act.sa_mask); 76 (void)__libc_sigaction(SIGABRT, &act, NULL); 77 sigdelset(&act.sa_mask, SIGABRT); 78 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 79 (void)raise(SIGABRT); 80 exit(1); 81 } 82