freebsd-dev/lib/libc/stdlib/abort.c

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/*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
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#include <signal.h>
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#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <pthread.h>
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void (*__cleanup)();
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/* XXX - why are these declarations here? */
extern int __sys_sigprocmask(int, const sigset_t *, sigset_t *);
extern int __sys_sigaction(int, const struct sigaction *,
struct sigaction *);
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void
abort()
{
struct sigaction act;
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/*
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* POSIX requires we flush stdio buffers on abort.
* XXX ISO C requires that abort() be async-signal-safe.
*/
if (__cleanup)
(*__cleanup)();
sigfillset(&act.sa_mask);
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/*
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* Don't block SIGABRT to give any handler a chance; we ignore
* any errors -- ISO C doesn't allow abort to return anyway.
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*/
sigdelset(&act.sa_mask, SIGABRT);
(void)__sys_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
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(void)kill(getpid(), SIGABRT);
/*
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* If SIGABRT was ignored, or caught and the handler returns, do
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* it again, only harder.
*/
act.sa_handler = SIG_DFL;
act.sa_flags = 0;
sigfillset(&act.sa_mask);
(void)__sys_sigaction(SIGABRT, &act, NULL);
sigdelset(&act.sa_mask, SIGABRT);
(void)__sys_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
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(void)kill(getpid(), SIGABRT);
exit(1);
}