1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : * vim: set ts=8 sw=4 et tw=99 ft=cpp:
3 : *
4 : * ***** BEGIN LICENSE BLOCK *****
5 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 : *
7 : * The contents of this file are subject to the Mozilla Public License Version
8 : * 1.1 (the "License"); you may not use this file except in compliance with
9 : * the License. You may obtain a copy of the License at:
10 : * http://www.mozilla.org/MPL/
11 : *
12 : * Software distributed under the License is distributed on an "AS IS" basis,
13 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14 : * for the specific language governing rights and limitations under the
15 : * License.
16 : *
17 : * The Original Code is Mozilla Code.
18 : *
19 : * The Initial Developer of the Original Code is
20 : * The Mozilla Foundation
21 : * Portions created by the Initial Developer are Copyright (C) 2012
22 : * the Initial Developer. All Rights Reserved.
23 : *
24 : * Contributor(s):
25 : * Mike Hommey <mh@glandium.org>
26 : *
27 : * Alternatively, the contents of this file may be used under the terms of
28 : * either the GNU General Public License Version 2 or later (the "GPL"), or
29 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30 : * in which case the provisions of the GPL or the LGPL are applicable instead
31 : * of those above. If you wish to allow use of your version of this file only
32 : * under the terms of either the GPL or the LGPL, and not to allow others to
33 : * use your version of this file under the terms of the MPL, indicate your
34 : * decision by deleting the provisions above and replace them with the notice
35 : * and other provisions required by the GPL or the LGPL. If you do not delete
36 : * the provisions above, a recipient may use your version of this file under
37 : * the terms of any one of the MPL, the GPL or the LGPL.
38 : *
39 : * ***** END LICENSE BLOCK ***** */
40 :
41 : #include "mozilla/Attributes.h"
42 : #include "mozilla/Types.h"
43 :
44 : #include <cstdio>
45 : #include <cstdlib>
46 : #ifndef WIN32
47 : #include <signal.h>
48 : #endif
49 :
50 : /* Implementations of runtime and static assertion macros for C and C++. */
51 :
52 : extern "C" {
53 :
54 : MOZ_EXPORT_API(void)
55 0 : MOZ_Crash()
56 : {
57 : /*
58 : * We write 123 here so that the machine code for this function is
59 : * unique. Otherwise the linker, trying to be smart, might use the
60 : * same code for MOZ_Crash and for some other function. That
61 : * messes up the signature in minidumps.
62 : */
63 :
64 : #if defined(WIN32)
65 : /*
66 : * We used to call DebugBreak() on Windows, but amazingly, it causes
67 : * the MSVS 2010 debugger not to be able to recover a call stack.
68 : */
69 : *((volatile int *) NULL) = 123;
70 : exit(3);
71 : #elif defined(__APPLE__)
72 : /*
73 : * On Mac OS X, Breakpad ignores signals. Only real Mach exceptions are
74 : * trapped.
75 : */
76 : *((volatile int *) NULL) = 123; /* To continue from here in GDB: "return" then "continue". */
77 : raise(SIGABRT); /* In case above statement gets nixed by the optimizer. */
78 : #else
79 0 : raise(SIGABRT); /* To continue from here in GDB: "signal 0". */
80 : #endif
81 0 : }
82 :
83 : MOZ_EXPORT_API(void)
84 0 : MOZ_Assert(const char* s, const char* file, int ln)
85 : {
86 0 : fprintf(stderr, "Assertion failure: %s, at %s:%d\n", s, file, ln);
87 0 : fflush(stderr);
88 0 : MOZ_Crash();
89 0 : }
90 :
91 : }
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