/* -*- 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