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Commit	Line	Data
	1	/*
	2	* Copyright (c) 1985, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 4. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29
	30	#if defined(LIBC_SCCS) && !defined(lint)
	31	static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93";
	32	#endif /* LIBC_SCCS and not lint */
	33	#include <sys/cdefs.h>
	34	__FBSDID("$FreeBSD: src/lib/libc/stdlib/abort.c,v 1.11 2007/01/09 00:28:09 imp Exp $");
	35
	36	#include "namespace.h"
	37	#include <signal.h>
	38	#include <stdarg.h>
	39	#include <stdlib.h>
	40	#include <stddef.h>
	41	#include <unistd.h>
	42	#include <pthread.h>
	43	#include <pthread_workqueue.h>
	44	#include "un-namespace.h"
	45
	46	#include "libc_private.h"
	47
	48	#include <CrashReporterClient.h>
	49	#include "_simple.h"
	50
	51	extern void (*__cleanup)();
	52	extern void __abort(void) __dead2;
	53
	54	#define TIMEOUT 10000 /* 10 milliseconds */
	55
	56	void
	57	abort()
	58	{
	59	struct sigaction act;
	60
	61	if (!CRGetCrashLogMessage())
	62	CRSetCrashLogMessage("abort() called");
	63
	64	/*
	65	* POSIX requires we flush stdio buffers on abort.
	66	* XXX ISO C requires that abort() be async-signal-safe.
	67	*/
	68	if (__cleanup)
	69	(*__cleanup)();
	70
	71	sigfillset(&act.sa_mask);
	72	/*
	73	* Don't block SIGABRT to give any handler a chance; we ignore
	74	* any errors -- ISO C doesn't allow abort to return anyway.
	75	*/
	76	sigdelset(&act.sa_mask, SIGABRT);
	77
	78	/* <rdar://problem/7397932> abort() should call pthread_kill to deliver a signal to the aborting thread
	79	* This helps gdb focus on the thread calling abort()
	80	*/
	81
	82	/* Block all signals on all other threads */
	83	sigset_t fullmask;
	84	sigfillset(&fullmask);
	85	(void)_sigprocmask(SIG_SETMASK, &fullmask, NULL);
	86
	87	/* <rdar://problem/8400096> Set the workqueue killable */
	88	__pthread_workqueue_setkill(1);
	89
	90	(void)pthread_sigmask(SIG_SETMASK, &act.sa_mask, NULL);
	91	(void)pthread_kill(pthread_self(), SIGABRT);
	92
	93	usleep(TIMEOUT); /* give time for signal to happen */
	94
	95	/*
	96	* If SIGABRT was ignored, or caught and the handler returns, do
	97	* it again, only harder.
	98	*/
	99	__abort();
	100	}
	101
	102	__private_extern__ void
	103	__abort()
	104	{
	105	struct sigaction act;
	106
	107	if (!CRGetCrashLogMessage())
	108	CRSetCrashLogMessage("__abort() called");
	109	act.sa_handler = SIG_DFL;
	110	act.sa_flags = 0;
	111	sigfillset(&act.sa_mask);
	112	(void)_sigaction(SIGABRT, &act, NULL);
	113	sigdelset(&act.sa_mask, SIGABRT);
	114
	115	/* <rdar://problem/7397932> abort() should call pthread_kill to deliver a signal to the aborting thread
	116	* This helps gdb focus on the thread calling abort()
	117	*/
	118
	119	/* Block all signals on all other threads */
	120	sigset_t fullmask;
	121	sigfillset(&fullmask);
	122	(void)_sigprocmask(SIG_SETMASK, &fullmask, NULL);
	123
	124	/* <rdar://problem/8400096> Set the workqueue killable */
	125	__pthread_workqueue_setkill(1);
	126
	127	(void)pthread_sigmask(SIG_SETMASK, &act.sa_mask, NULL);
	128	(void)pthread_kill(pthread_self(), SIGABRT);
	129
	130	usleep(TIMEOUT); /* give time for signal to happen */
	131
	132	/* If for some reason SIGABRT was not delivered, we exit using __builtin_trap
	133	* which generates an illegal instruction on i386: <rdar://problem/8400958>
	134	* and SIGTRAP on arm.
	135	*/
	136	sigfillset(&act.sa_mask);
	137	sigdelset(&act.sa_mask, SIGILL);
	138	sigdelset(&act.sa_mask, SIGTRAP);
	139	(void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
	140	__builtin_trap();
	141	}
	142
	143	__private_extern__ void
	144	abort_report_np(const char *fmt, ...)
	145	{
	146	_SIMPLE_STRING s;
	147	va_list ap;
	148
	149	if ((s = _simple_salloc()) != NULL) {
	150	va_start(ap, fmt);
	151	_simple_vsprintf(s, fmt, ap);
	152	va_end(ap);
	153	CRSetCrashLogMessage(_simple_string(s));
	154	} else
	155	CRSetCrashLogMessage(fmt); /* the format string is better than nothing */
	156	abort();
	157	}