From 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 03:47:29 +0200 Subject: Adding upstream version 115.8.0esr. Signed-off-by: Daniel Baumann --- mfbt/Assertions.cpp | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 mfbt/Assertions.cpp (limited to 'mfbt/Assertions.cpp') diff --git a/mfbt/Assertions.cpp b/mfbt/Assertions.cpp new file mode 100644 index 0000000000..7721677f19 --- /dev/null +++ b/mfbt/Assertions.cpp @@ -0,0 +1,52 @@ +/* -*- 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 "mozilla/Sprintf.h" + +#include + +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; + +static char sPrintfCrashReason[sPrintfCrashReasonSize] = {}; + +// Accesses to this atomic are not included in web replay recordings, so that +// if we crash in an area where recorded events are not allowed the true reason +// for the crash is not obscured by a record/replay error. +static mozilla::Atomic sCrashing(false); + +MFBT_API MOZ_COLD MOZ_NEVER_INLINE MOZ_FORMAT_PRINTF(1, 2) const + char* MOZ_CrashPrintf(const char* aFormat, ...) { + if (!sCrashing.compareExchange(false, true)) { + // In the unlikely event of a race condition, skip + // setting the crash reason and just crash safely. + MOZ_RELEASE_ASSERT(false); + } + va_list aArgs; + va_start(aArgs, aFormat); + int ret = VsprintfLiteral(sPrintfCrashReason, aFormat, aArgs); + va_end(aArgs); + MOZ_RELEASE_ASSERT( + ret >= 0 && size_t(ret) < sPrintfCrashReasonSize, + "Could not write the explanation string to the supplied buffer!"); + return sPrintfCrashReason; +} + +MOZ_END_EXTERN_C + +MFBT_API MOZ_NORETURN MOZ_COLD void mozilla::detail::InvalidArrayIndex_CRASH( + size_t aIndex, size_t aLength) { + MOZ_CRASH_UNSAFE_PRINTF("ElementAt(aIndex = %zu, aLength = %zu)", aIndex, + aLength); +} -- cgit v1.2.3