| 1 | /* Copyright (C) 1991 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Library General Public License as |
| 6 | published by the Free Software Foundation; either version 2 of the |
| 7 | License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Library General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Library General Public |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
| 17 | Cambridge, MA 02139, USA. */ |
| 18 | |
| 19 | /* Hacked up for uClibc by Erik Andersen */ |
| 20 | |
| 21 | #include <features.h> |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <unistd.h> |
| 26 | #include <signal.h> |
| 27 | #include <errno.h> |
| 28 | |
| 29 | libc_hidden_proto(abort) |
| 30 | |
| 31 | /* Experimentally off - libc_hidden_proto(memset) */ |
| 32 | libc_hidden_proto(sigaction) |
| 33 | libc_hidden_proto(sigprocmask) |
| 34 | libc_hidden_proto(raise) |
| 35 | libc_hidden_proto(_exit) |
| 36 | |
| 37 | /* Our last ditch effort to commit suicide */ |
| 38 | #ifdef __UCLIBC_ABORT_INSTRUCTION__ |
| 39 | # define ABORT_INSTRUCTION __asm__(__UCLIBC_ABORT_INSTRUCTION__) |
| 40 | #else |
| 41 | # define ABORT_INSTRUCTION |
| 42 | # warning "no abort instruction defined for your arch" |
| 43 | #endif |
| 44 | |
| 45 | #ifdef __UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT__ |
| 46 | extern void weak_function _stdio_term(void) attribute_hidden; |
| 47 | #endif |
| 48 | static smallint been_there_done_that = 0; |
| 49 | |
| 50 | /* Be prepared in case multiple threads try to abort() */ |
| 51 | #include <bits/uClibc_mutex.h> |
| 52 | __UCLIBC_MUTEX_STATIC(mylock, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP); |
| 53 | |
| 54 | /* Cause an abnormal program termination with core-dump */ |
| 55 | void abort(void) |
| 56 | { |
| 57 | sigset_t sigs; |
| 58 | |
| 59 | /* Make sure we acquire the lock before proceeding */ |
| 60 | __UCLIBC_MUTEX_LOCK_CANCEL_UNSAFE(mylock); |
| 61 | |
| 62 | /* Unmask SIGABRT to be sure we can get it */ |
| 63 | if (__sigemptyset(&sigs) == 0 && __sigaddset(&sigs, SIGABRT) == 0) { |
| 64 | sigprocmask(SIG_UNBLOCK, &sigs, (sigset_t *) NULL); |
| 65 | } |
| 66 | |
| 67 | while (1) { |
| 68 | /* Try to suicide with a SIGABRT */ |
| 69 | if (been_there_done_that == 0) { |
| 70 | been_there_done_that++; |
| 71 | |
| 72 | #ifdef __UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT__ |
| 73 | /* If we are using stdio, try to shut it down. At the very least, |
| 74 | * this will attempt to commit all buffered writes. It may also |
| 75 | * unbuffer all writable files, or close them outright. |
| 76 | * Check the stdio routines for details. */ |
| 77 | if (_stdio_term) { |
| 78 | _stdio_term(); |
| 79 | } |
| 80 | #endif |
| 81 | |
| 82 | abort_it: |
| 83 | __UCLIBC_MUTEX_UNLOCK_CANCEL_UNSAFE(mylock); |
| 84 | raise(SIGABRT); |
| 85 | __UCLIBC_MUTEX_LOCK_CANCEL_UNSAFE(mylock); |
| 86 | } |
| 87 | |
| 88 | /* Still here? Try to remove any signal handlers */ |
| 89 | if (been_there_done_that == 1) { |
| 90 | struct sigaction act; |
| 91 | |
| 92 | been_there_done_that++; |
| 93 | memset(&act, '\0', sizeof(struct sigaction)); |
| 94 | act.sa_handler = SIG_DFL; |
| 95 | __sigfillset(&act.sa_mask); |
| 96 | act.sa_flags = 0; |
| 97 | sigaction(SIGABRT, &act, NULL); |
| 98 | |
| 99 | goto abort_it; |
| 100 | } |
| 101 | |
| 102 | /* Still here? Try to suicide with an illegal instruction */ |
| 103 | if (been_there_done_that == 2) { |
| 104 | been_there_done_that++; |
| 105 | ABORT_INSTRUCTION; |
| 106 | } |
| 107 | |
| 108 | /* Still here? Try to at least exit */ |
| 109 | if (been_there_done_that == 3) { |
| 110 | been_there_done_that++; |
| 111 | _exit(127); |
| 112 | } |
| 113 | |
| 114 | /* Still here? We're screwed. Sleepy time. Good night. */ |
| 115 | while (1) |
| 116 | /* Try for ever and ever */ |
| 117 | ABORT_INSTRUCTION; |
| 118 | } |
| 119 | } |
| 120 | libc_hidden_def(abort) |
| 121 | |
