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enigmail  1.4.3
Assertions.cpp
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
00002  * vim: set ts=8 sw=4 et tw=99 ft=cpp:
00003  *
00004  * ***** BEGIN LICENSE BLOCK *****
00005  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00006  *
00007  * The contents of this file are subject to the Mozilla Public License Version
00008  * 1.1 (the "License"); you may not use this file except in compliance with
00009  * the License. You may obtain a copy of the License at:
00010  * http://www.mozilla.org/MPL/
00011  *
00012  * Software distributed under the License is distributed on an "AS IS" basis,
00013  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00014  * for the specific language governing rights and limitations under the
00015  * License.
00016  *
00017  * The Original Code is Mozilla Code.
00018  *
00019  * The Initial Developer of the Original Code is
00020  *   The Mozilla Foundation
00021  * Portions created by the Initial Developer are Copyright (C) 2012
00022  * the Initial Developer. All Rights Reserved.
00023  *
00024  * Contributor(s):
00025  *   Mike Hommey <mh@glandium.org>
00026  *
00027  * Alternatively, the contents of this file may be used under the terms of
00028  * either the GNU General Public License Version 2 or later (the "GPL"), or
00029  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00030  * in which case the provisions of the GPL or the LGPL are applicable instead
00031  * of those above. If you wish to allow use of your version of this file only
00032  * under the terms of either the GPL or the LGPL, and not to allow others to
00033  * use your version of this file under the terms of the MPL, indicate your
00034  * decision by deleting the provisions above and replace them with the notice
00035  * and other provisions required by the GPL or the LGPL. If you do not delete
00036  * the provisions above, a recipient may use your version of this file under
00037  * the terms of any one of the MPL, the GPL or the LGPL.
00038  *
00039  * ***** END LICENSE BLOCK ***** */
00040 
00041 #include "mozilla/Attributes.h"
00042 #include "mozilla/Types.h"
00043 
00044 #include <cstdio>
00045 #include <cstdlib>
00046 #ifndef WIN32
00047 #include <signal.h>
00048 #endif
00049 
00050 /* Implementations of runtime and static assertion macros for C and C++. */
00051 
00052 extern "C" {
00053 
00054 MOZ_EXPORT_API(void)
00055 MOZ_Crash()
00056 {
00057   /*
00058    * We write 123 here so that the machine code for this function is
00059    * unique. Otherwise the linker, trying to be smart, might use the
00060    * same code for MOZ_Crash and for some other function. That
00061    * messes up the signature in minidumps.
00062    */
00063 
00064 #if defined(WIN32)
00065   /*
00066    * We used to call DebugBreak() on Windows, but amazingly, it causes
00067    * the MSVS 2010 debugger not to be able to recover a call stack.
00068    */
00069   *((volatile int *) NULL) = 123;
00070   exit(3);
00071 #elif defined(__APPLE__)
00072   /*
00073    * On Mac OS X, Breakpad ignores signals. Only real Mach exceptions are
00074    * trapped.
00075    */
00076   *((volatile int *) NULL) = 123;  /* To continue from here in GDB: "return" then "continue". */
00077   raise(SIGABRT);  /* In case above statement gets nixed by the optimizer. */
00078 #else
00079   raise(SIGABRT);  /* To continue from here in GDB: "signal 0". */
00080 #endif
00081 }
00082 
00083 MOZ_EXPORT_API(void)
00084 MOZ_Assert(const char* s, const char* file, int ln)
00085 {
00086   fprintf(stderr, "Assertion failure: %s, at %s:%d\n", s, file, ln);
00087   fflush(stderr);
00088   MOZ_Crash();
00089 }
00090 
00091 }