gecko-dev/mfbt/Assertions.cpp
Chris Peterson 34deeb369a Bug 743306 - Part 2: On Android, segfault in MOZ_Crash because SIGABRT is handled asynchronously. r=glandium
--HG--
extra : rebase_source : 46233676f73a5b8040f92ec251fe0ae3ecca9934
2012-04-09 12:45:25 -07:00

108 lines
3.5 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sw=4 et tw=99 ft=cpp:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Code.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2012
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mike Hommey <mh@glandium.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "mozilla/Attributes.h"
#include "mozilla/Types.h"
#include <cstdio>
#include <cstdlib>
#ifndef WIN32
#include <signal.h>
#endif
#ifdef ANDROID
#include <android/log.h>
#endif
/* Implementations of runtime and static assertion macros for C and C++. */
extern "C" {
MOZ_EXPORT_API(void)
MOZ_Crash()
{
/*
* We write 123 here so that the machine code for this function is
* unique. Otherwise the linker, trying to be smart, might use the
* same code for MOZ_Crash and for some other function. That
* messes up the signature in minidumps.
*/
#if defined(WIN32)
/*
* We used to call DebugBreak() on Windows, but amazingly, it causes
* the MSVS 2010 debugger not to be able to recover a call stack.
*/
*((volatile int *) NULL) = 123;
exit(3);
#elif defined(ANDROID)
/*
* On Android, raise(SIGABRT) is handled asynchronously. Seg fault now
* so we crash immediately and capture the current call stack.
*/
*((volatile int *) NULL) = 123;
abort();
#elif defined(__APPLE__)
/*
* On Mac OS X, Breakpad ignores signals. Only real Mach exceptions are
* trapped.
*/
*((volatile int *) NULL) = 123; /* To continue from here in GDB: "return" then "continue". */
raise(SIGABRT); /* In case above statement gets nixed by the optimizer. */
#else
raise(SIGABRT); /* To continue from here in GDB: "signal 0". */
#endif
}
MOZ_EXPORT_API(void)
MOZ_Assert(const char* s, const char* file, int ln)
{
#ifdef ANDROID
__android_log_print(ANDROID_LOG_FATAL, "MOZ_Assert",
"Assertion failure: %s, at %s:%d\n", s, file, ln);
#else
fprintf(stderr, "Assertion failure: %s, at %s:%d\n", s, file, ln);
fflush(stderr);
#endif
MOZ_Crash();
}
}