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