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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	#pragma clang diagnostic push
	31	#pragma clang diagnostic ignored "-Wstrict-prototypes"
	32
	33	#if defined(LIBC_SCCS) && !defined(lint)
	34	static char sccsid[] = "@(#)abort.c 8.1 (Berkeley) 6/4/93";
	35	#endif /* LIBC_SCCS and not lint */
	36	#include <sys/cdefs.h>
	37	__FBSDID("$FreeBSD: src/lib/libc/stdlib/abort.c,v 1.11 2007/01/09 00:28:09 imp Exp $");
	38
	39	#include "namespace.h"
	40	#include <signal.h>
	41	#include <stdarg.h>
	42	#include <stdlib.h>
	43	#include <stddef.h>
	44	#include <unistd.h>
	45	#include <pthread.h>
	46	#include <pthread_workqueue.h>
	47	#include "un-namespace.h"
	48
	49	#include "libc_private.h"
	50
	51	#include <CrashReporterClient.h>
	52	#include "_simple.h"
	53
	54	extern void (*__cleanup)();
	55	extern void __abort(void) __dead2;
	56
	57	#define TIMEOUT 10000 /* 10 milliseconds */
	58
	59	void
	60	abort()
	61	{
	62	struct sigaction act;
	63
	64	if (!CRGetCrashLogMessage())
	65	CRSetCrashLogMessage("abort() called");
	66
	67	/*
	68	* POSIX requires we flush stdio buffers on abort.
	69	* XXX ISO C requires that abort() be async-signal-safe.
	70	*/
	71	if (__cleanup)
	72	(*__cleanup)();
	73
	74	sigfillset(&act.sa_mask);
	75	/*
	76	* Don't block SIGABRT to give any handler a chance; we ignore
	77	* any errors -- ISO C doesn't allow abort to return anyway.
	78	*/
	79	sigdelset(&act.sa_mask, SIGABRT);
	80
	81	/* <rdar://problem/7397932> abort() should call pthread_kill to deliver a signal to the aborting thread
	82	* This helps gdb focus on the thread calling abort()
	83	*/
	84
	85	/* Block all signals on all other threads */
	86	sigset_t fullmask;
	87	sigfillset(&fullmask);
	88	(void)_sigprocmask(SIG_SETMASK, &fullmask, NULL);
	89
	90	/* <rdar://problem/8400096> Set the workqueue killable */
	91	__pthread_workqueue_setkill(1);
	92
	93	(void)pthread_sigmask(SIG_SETMASK, &act.sa_mask, NULL);
	94	(void)pthread_kill(pthread_self(), SIGABRT);
	95
	96	usleep(TIMEOUT); /* give time for signal to happen */
	97
	98	/*
	99	* If SIGABRT was ignored, or caught and the handler returns, do
	100	* it again, only harder.
	101	*/
	102	__abort();
	103	}
	104
	105	__private_extern__ void
	106	__abort()
	107	{
	108	struct sigaction act;
	109
	110	if (!CRGetCrashLogMessage())
	111	CRSetCrashLogMessage("__abort() called");
	112	act.sa_handler = SIG_DFL;
	113	act.sa_flags = 0;
	114	sigfillset(&act.sa_mask);
	115	(void)_sigaction(SIGABRT, &act, NULL);
	116	sigdelset(&act.sa_mask, SIGABRT);
	117
	118	/* <rdar://problem/7397932> abort() should call pthread_kill to deliver a signal to the aborting thread
	119	* This helps gdb focus on the thread calling abort()
	120	*/
	121
	122	/* Block all signals on all other threads */
	123	sigset_t fullmask;
	124	sigfillset(&fullmask);
	125	(void)_sigprocmask(SIG_SETMASK, &fullmask, NULL);
	126
	127	/* <rdar://problem/8400096> Set the workqueue killable */
	128	__pthread_workqueue_setkill(1);
	129
	130	(void)pthread_sigmask(SIG_SETMASK, &act.sa_mask, NULL);
	131	(void)pthread_kill(pthread_self(), SIGABRT);
	132
	133	usleep(TIMEOUT); /* give time for signal to happen */
	134
	135	/* If for some reason SIGABRT was not delivered, we exit using __builtin_trap
	136	* which generates an illegal instruction on i386: <rdar://problem/8400958>
	137	* and SIGTRAP on arm.
	138	*/
	139	sigfillset(&act.sa_mask);
	140	sigdelset(&act.sa_mask, SIGILL);
	141	sigdelset(&act.sa_mask, SIGTRAP);
	142	(void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
	143	__builtin_trap();
	144	}
	145
	146	void
	147	abort_report_np(const char *fmt, ...)
	148	{
	149	_SIMPLE_STRING s;
	150	va_list ap;
	151
	152	if ((s = _simple_salloc()) != NULL) {
	153	va_start(ap, fmt);
	154	_simple_vsprintf(s, fmt, ap);
	155	va_end(ap);
	156	CRSetCrashLogMessage(_simple_string(s));
	157	} else
	158	CRSetCrashLogMessage(fmt); /* the format string is better than nothing */
	159	abort();
	160	}
	161	#pragma clang diagnostic pop