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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Assertions.h"
#include "mozilla/Atomics.h"
#include <stdarg.h>
MOZ_BEGIN_EXTERN_C
/*
* The crash reason is defined as a global variable here rather than in the
* crash reporter itself to make it available to all code, even libraries like
* JS that don't link with the crash reporter directly. This value will only
* be consumed if the crash reporter is used by the target application.
*/
MFBT_DATA const char* gMozCrashReason = nullptr;
#ifndef DEBUG
MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE void
MOZ_CrashOOL(int aLine, const char* aReason)
#else
MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE void
MOZ_CrashOOL(const char* aFilename, int aLine, const char* aReason)
#endif
{
#ifdef DEBUG
MOZ_ReportCrash(aReason, aFilename, aLine);
#endif
MOZ_CRASH_ANNOTATE(aReason);
MOZ_REALLY_CRASH(aLine);
}
static char sPrintfCrashReason[sPrintfCrashReasonSize] = {};
static mozilla::Atomic<bool> sCrashing(false);
#ifndef DEBUG
MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE MOZ_FORMAT_PRINTF(2, 3) void
MOZ_CrashPrintf(int aLine, const char* aFormat, ...)
#else
MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE MOZ_FORMAT_PRINTF(3, 4) void
MOZ_CrashPrintf(const char* aFilename, int aLine, const char* aFormat, ...)
#endif
{
if (!sCrashing.compareExchange(false, true)) {
// In the unlikely event of a race condition, skip
// setting the crash reason and just crash safely.
MOZ_REALLY_CRASH(aLine);
}
va_list aArgs;
va_start(aArgs, aFormat);
int ret = vsnprintf(sPrintfCrashReason, sPrintfCrashReasonSize,
aFormat, aArgs);
va_end(aArgs);
MOZ_RELEASE_ASSERT(ret >= 0 && size_t(ret) < sPrintfCrashReasonSize,
"Could not write the explanation string to the supplied buffer!");
#ifdef DEBUG
MOZ_ReportCrash(sPrintfCrashReason, aFilename, aLine);
#endif
MOZ_CRASH_ANNOTATE(sPrintfCrashReason);
MOZ_REALLY_CRASH(aLine);
}
MOZ_END_EXTERN_C
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