blob: b9b9e8be494fdc46e94989c1e70ff94f1661a9c8 [file] [log] [blame]
/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
*
* 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 INC. ``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 INC. OR
* 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/MemoryFootprint.h>
#include <algorithm>
#include <type_traits>
#include <windows.h>
#include <psapi.h>
#include <wtf/MallocPtr.h>
#include <wtf/win/Win32Handle.h>
namespace WTF {
size_t memoryFootprint()
{
// We would like to calculate size of private working set.
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684891(v=vs.85).aspx
// > The working set of a program is a collection of those pages in its virtual address
// > space that have been recently referenced. It includes both shared and private data.
// > The shared data includes pages that contain all instructions your application executes,
// > including those in your DLLs and the system DLLs. As the working set size increases,
// > memory demand increases.
Win32Handle process(OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, GetCurrentProcessId()));
if (!process.isValid())
return 0;
auto countSizeOfPrivateWorkingSet = [] (const PSAPI_WORKING_SET_INFORMATION& workingSets) {
constexpr const size_t pageSize = 4 * KB;
size_t numberOfPrivateWorkingSetPages = 0;
for (size_t i = 0; i < workingSets.NumberOfEntries; ++i) {
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684902(v=vs.85).aspx
PSAPI_WORKING_SET_BLOCK workingSetBlock = workingSets.WorkingSetInfo[i];
if (!workingSetBlock.Shared)
numberOfPrivateWorkingSetPages++;
}
return numberOfPrivateWorkingSetPages * pageSize;
};
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684946(v=vs.85).aspx
constexpr const size_t minNumberOfEntries = 16;
constexpr const size_t sizeOfBufferOnStack = sizeof(PSAPI_WORKING_SET_INFORMATION) + minNumberOfEntries * sizeof(PSAPI_WORKING_SET_BLOCK);
std::aligned_storage<sizeOfBufferOnStack, alignof(PSAPI_WORKING_SET_INFORMATION)>::type bufferOnStack;
auto* workingSetsOnStack = reinterpret_cast<PSAPI_WORKING_SET_INFORMATION*>(&bufferOnStack);
if (QueryWorkingSet(process.get(), workingSetsOnStack, sizeOfBufferOnStack))
return countSizeOfPrivateWorkingSet(*workingSetsOnStack);
auto updateNumberOfEntries = [&] (size_t numberOfEntries) {
// If working set increases between first QueryWorkingSet and second QueryWorkingSet, the second one can fail.
// At that time, we should increase numberOfEntries.
return std::max(minNumberOfEntries, numberOfEntries + numberOfEntries / 4 + 1);
};
for (size_t numberOfEntries = updateNumberOfEntries(workingSetsOnStack->NumberOfEntries);;) {
size_t workingSetSizeInBytes = sizeof(PSAPI_WORKING_SET_INFORMATION) + sizeof(PSAPI_WORKING_SET_BLOCK) * numberOfEntries;
auto workingSets = MallocPtr<PSAPI_WORKING_SET_INFORMATION>::malloc(workingSetSizeInBytes);
if (QueryWorkingSet(process.get(), workingSets.get(), workingSetSizeInBytes))
return countSizeOfPrivateWorkingSet(*workingSets);
if (GetLastError() != ERROR_BAD_LENGTH)
return 0;
numberOfEntries = updateNumberOfEntries(workingSets->NumberOfEntries);
}
}
}