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 #include "namespace.h" 37 #include <signal.h> 38 #include <stdlib.h> 39 #include <stddef.h> 40 #include <unistd.h> 41 #include <pthread.h> 42 #include "un-namespace.h" 43 44 #include "libc_private.h" 45 46 void 47 abort(void) 48 { 49 struct sigaction act; 50 51 /* 52 * POSIX requires we flush stdio buffers on abort. 53 * XXX ISO C requires that abort() be async-signal-safe. 54 */ 55 if (__cleanup) 56 (*__cleanup)(); 57 58 sigfillset(&act.sa_mask); 59 /* 60 * Don't block SIGABRT to give any handler a chance; we ignore 61 * any errors -- ISO C doesn't allow abort to return anyway. 62 */ 63 sigdelset(&act.sa_mask, SIGABRT); 64 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 65 (void)raise(SIGABRT); 66 67 /* 68 * If SIGABRT was ignored, or caught and the handler returns, do 69 * it again, only harder. 70 */ 71 act.sa_handler = SIG_DFL; 72 act.sa_flags = 0; 73 sigfillset(&act.sa_mask); 74 (void)__libc_sigaction(SIGABRT, &act, NULL); 75 sigdelset(&act.sa_mask, SIGABRT); 76 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 77 (void)raise(SIGABRT); 78 exit(1); 79 } 80