mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/* Copyright (C) 1991-2021 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, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <libc-lock.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sigsetops.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
|
|
|
|
/* Exported variable to locate abort message in core files etc. */
|
|
struct abort_msg_s *__abort_msg __attribute__ ((nocommon));
|
|
libc_hidden_def (__abort_msg)
|
|
|
|
/* 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. */
|
|
|
|
/* Unblock SIGABRT. */
|
|
if (stage == 0)
|
|
{
|
|
++stage;
|
|
__sigemptyset (&sigs);
|
|
__sigaddset (&sigs, SIGABRT);
|
|
__sigprocmask (SIG_UNBLOCK, &sigs, 0);
|
|
}
|
|
|
|
/* Send signal which possibly calls a user handler. */
|
|
if (stage == 1)
|
|
{
|
|
/* 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 == 2)
|
|
{
|
|
++stage;
|
|
memset (&act, '\0', sizeof (struct sigaction));
|
|
act.sa_handler = SIG_DFL;
|
|
__sigfillset (&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
__sigaction (SIGABRT, &act, NULL);
|
|
}
|
|
|
|
/* Try again. */
|
|
if (stage == 3)
|
|
{
|
|
++stage;
|
|
raise (SIGABRT);
|
|
}
|
|
|
|
/* Now try to abort using the system specific command. */
|
|
if (stage == 4)
|
|
{
|
|
++stage;
|
|
ABORT_INSTRUCTION;
|
|
}
|
|
|
|
/* If we can't signal ourselves and the abort instruction failed, exit. */
|
|
if (stage == 5)
|
|
{
|
|
++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)
|