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 #include "namespace.h" 33 #include <signal.h> 34 #include <stdlib.h> 35 #include <stddef.h> 36 #include <unistd.h> 37 #include <pthread.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 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 61 (void)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 (void)__libc_sigaction(SIGABRT, &act, NULL); 71 sigdelset(&act.sa_mask, SIGABRT); 72 (void)__libc_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL); 73 (void)raise(SIGABRT); 74 exit(1); 75 } 76