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[/] [or1k/] [trunk/] [linux/] [uClibc/] [libc/] [stdlib/] [abort.c] - Blame information for rev 1771

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1 1325 phoenix
/* Copyright (C) 1991 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB.  If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA.  */
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/* Hacked up for uClibc by Erik Andersen */
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#define _GNU_SOURCE
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#include <features.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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/* Our last ditch effort to commit suicide */
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#if defined(__i386__)
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#define ABORT_INSTRUCTION asm ("hlt")
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#elif defined(__ia64__)
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#define ABORT_INSTRUCTION asm ("break 0")
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#elif defined(__mc68000__)
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#define ABORT_INSTRUCTION asm (".long 0xffffffff")
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#elif defined(__mips__)
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#define ABORT_INSTRUCTION asm ("break 255")
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#elif defined(__s390__)
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#define ABORT_INSTRUCTION asm (".word 0")
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#elif defined(__sparc__)
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#define ABORT_INSTRUCTION asm ("unimp 0xf00")
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#elif defined(__x86_64__)
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#define ABORT_INSTRUCTION asm ("hlt")
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#else
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#define ABORT_INSTRUCTION
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#endif
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extern void weak_function _stdio_term(void);
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extern void _exit __P((int __status)) __attribute__ ((__noreturn__));
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static int been_there_done_that = 0;
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/* Be prepared in case multiple threads try to abort().  */
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#ifdef __UCLIBC_HAS_THREADS__
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#include <pthread.h>
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static pthread_mutex_t mylock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
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# define LOCK   __pthread_mutex_lock(&mylock)
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# define UNLOCK __pthread_mutex_unlock(&mylock);
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#else
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# define LOCK
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# define UNLOCK
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#endif
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/* Cause an abnormal program termination with core-dump.  */
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void abort(void)
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{
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    sigset_t sigset;
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      /* Make sure we acquire the lock before proceeding.  */
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      LOCK;
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    /* Unmask SIGABRT to be sure we can get it */
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    if (__sigemptyset(&sigset) == 0 && __sigaddset(&sigset, SIGABRT) == 0) {
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        sigprocmask(SIG_UNBLOCK, &sigset, (sigset_t *) NULL);
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    }
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    /* If we are using stdio, try to shut it down.  At the very least,
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         * this will attempt to commit all buffered writes.  It may also
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         * unbuffer all writable files, or close them outright.
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         * Check the stdio routines for details. */
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    if (_stdio_term)
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                _stdio_term();
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    while (1) {
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        /* Try to suicide with a SIGABRT.  */
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        if (been_there_done_that == 0) {
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            been_there_done_that++;
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            UNLOCK;
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            raise(SIGABRT);
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            LOCK;
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        }
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        /* Still here?  Try to remove any signal handlers.  */
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        if (been_there_done_that == 1) {
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            struct sigaction act;
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            been_there_done_that++;
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            memset (&act, '\0', sizeof (struct sigaction));
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            act.sa_handler = SIG_DFL;
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            __sigfillset (&act.sa_mask);
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            act.sa_flags = 0;
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            sigaction (SIGABRT, &act, NULL);
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        }
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        /* Still here?  Try to suicide with an illegal instruction */
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        if (been_there_done_that == 2) {
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            been_there_done_that++;
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            ABORT_INSTRUCTION;
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        }
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        /* Still here?  Try to at least exit */
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        if (been_there_done_that == 3) {
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            been_there_done_that++;
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            _exit (127);
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        }
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        /* Still here?  We're screwed.  Sleepy time.  Good night */
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        while (1)
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            /* Try for ever and ever.  */
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            ABORT_INSTRUCTION;
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    }
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}
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