/* * Copyright (C) 2018 Sony Interactive Entertainment Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include <wtf/win/DbgHelperWin.h> #include <mutex> namespace WTF { namespace DbgHelper { // We are only calling these DbgHelp.dll functions in debug mode since the library is not threadsafe. // It's possible for external code to call the library at the same time as WebKit and cause memory corruption. #if !defined(NDEBUG) static Lock callMutex; static void initializeSymbols(HANDLE hProc) { static std::once_flag onceFlag; std::call_once(onceFlag, [&]() { if (!SymInitialize(hProc, nullptr, TRUE)) LOG_ERROR("Failed to initialze symbol information %d", GetLastError()); }); } bool SymFromAddress(HANDLE hProc, DWORD64 address, DWORD64* displacement, SYMBOL_INFO* symbolInfo) { LockHolder lock(callMutex); initializeSymbols(hProc); bool success = ::SymFromAddr(hProc, address, displacement, symbolInfo); if (success) symbolInfo->Name[symbolInfo->NameLen] = '\0'; return success; } #else bool SymFromAddress(HANDLE, DWORD64, DWORD64*, SYMBOL_INFO*) { return false; } #endif // !defined(NDEBUG) } // namespace DbgHelper } // namespace WTF