diff options
Diffstat (limited to 'stdlib/abort.c')
| -rw-r--r-- | stdlib/abort.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/stdlib/abort.c b/stdlib/abort.c deleted file mode 100644 index 00788f22c7..0000000000 --- a/stdlib/abort.c +++ /dev/null @@ -1,140 +0,0 @@ -/* Copyright (C) 1991,93,95,96,97,98,2001,02 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <bits/libc-lock.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -/* Try to get a machine dependent instruction which will make the - program crash. This is used in case everything else fails. */ -#include <abort-instr.h> -#ifndef ABORT_INSTRUCTION -/* No such instruction is available. */ -# define ABORT_INSTRUCTION -#endif - -#ifdef USE_IN_LIBIO -# include <libio/libioP.h> -# define fflush(s) _IO_flush_all_lockp (0) -#endif - -/* We must avoid to run in circles. Therefore we remember how far we - already got. */ -static int stage; - -/* We should be prepared for multiple threads trying to run abort. */ -__libc_lock_define_initialized_recursive (static, lock); - - -/* Cause an abnormal program termination with core-dump. */ -void -abort (void) -{ - struct sigaction act; - sigset_t sigs; - - /* First acquire the lock. */ - __libc_lock_lock_recursive (lock); - - /* Now it's for sure we are alone. But recursive calls are possible. */ - - /* Unlock SIGABRT. */ - if (stage == 0) - { - ++stage; - if (__sigemptyset (&sigs) == 0 && - __sigaddset (&sigs, SIGABRT) == 0) - __sigprocmask (SIG_UNBLOCK, &sigs, (sigset_t *) NULL); - } - - /* Flush all streams. We cannot close them now because the user - might have registered a handler for SIGABRT. */ - if (stage == 1) - { - ++stage; - fflush (NULL); - } - - /* Send signal which possibly calls a user handler. */ - if (stage == 2) - { - /* This stage is special: we must allow repeated calls of - `abort' when a user defined handler for SIGABRT is installed. - This is risky since the `raise' implementation might also - fail but I don't see another possibility. */ - int save_stage = stage; - - stage = 0; - __libc_lock_unlock_recursive (lock); - - raise (SIGABRT); - - __libc_lock_lock_recursive (lock); - stage = save_stage + 1; - } - - /* There was a handler installed. Now remove it. */ - if (stage == 3) - { - ++stage; - memset (&act, '\0', sizeof (struct sigaction)); - act.sa_handler = SIG_DFL; - __sigfillset (&act.sa_mask); - act.sa_flags = 0; - __sigaction (SIGABRT, &act, NULL); - } - - /* Now close the streams which also flushes the output the user - defined handler might has produced. */ - if (stage == 4) - { - ++stage; - __fcloseall (); - } - - /* Try again. */ - if (stage == 5) - { - ++stage; - raise (SIGABRT); - } - - /* Now try to abort using the system specific command. */ - if (stage == 6) - { - ++stage; - ABORT_INSTRUCTION; - } - - /* If we can't signal ourselves and the abort instruction failed, exit. */ - if (stage == 7) - { - ++stage; - _exit (127); - } - - /* If even this fails try to use the provided instruction to crash - or otherwise make sure we never return. */ - while (1) - /* Try for ever and ever. */ - ABORT_INSTRUCTION; -} -libc_hidden_def (abort) |