mirror of
https://github.com/mozilla/gecko-dev.git
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127 lines
3.7 KiB
C++
127 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FileUtilsWin.h"
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#include <windows.h>
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#include <psapi.h>
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#include "base/process_util.h"
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#include "mozilla/ProfilerLabels.h"
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#include "mozilla/ScopeExit.h"
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#include "mozilla/Unused.h"
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#include "nsWindowsHelpers.h"
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namespace mozilla {
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bool HandleToFilename(HANDLE aHandle, const LARGE_INTEGER& aOffset,
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nsAString& aFilename) {
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AUTO_PROFILER_LABEL("HandletoFilename", OTHER);
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aFilename.Truncate();
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// This implementation is nice because it uses fully documented APIs that
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// are available on all Windows versions that we support.
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nsAutoHandle fileMapping(
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CreateFileMapping(aHandle, nullptr, PAGE_READONLY, 0, 1, nullptr));
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if (!fileMapping) {
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return false;
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}
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const auto view = MapViewOfFile(fileMapping, FILE_MAP_READ, aOffset.HighPart,
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aOffset.LowPart, 1);
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if (!view) {
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return false;
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}
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const auto cleanup =
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MakeScopeExit([&]() { mozilla::Unused << UnmapViewOfFile(view); });
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nsAutoString mappedFilename;
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DWORD len = 0;
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SetLastError(ERROR_SUCCESS);
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do {
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mappedFilename.SetLength(mappedFilename.Length() + MAX_PATH);
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len = GetMappedFileNameW(GetCurrentProcess(), view, mappedFilename.get(),
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mappedFilename.Length());
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} while (!len && GetLastError() == ERROR_INSUFFICIENT_BUFFER);
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if (!len) {
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return false;
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}
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mappedFilename.Truncate(len);
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return NtPathToDosPath(mappedFilename, aFilename);
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}
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template <class T>
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struct RVAMap {
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RVAMap(HANDLE map, DWORD offset) {
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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DWORD alignedOffset =
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(offset / info.dwAllocationGranularity) * info.dwAllocationGranularity;
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MOZ_ASSERT(offset - alignedOffset < info.dwAllocationGranularity, "Wtf");
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mRealView = ::MapViewOfFile(map, FILE_MAP_READ, 0, alignedOffset,
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sizeof(T) + (offset - alignedOffset));
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mMappedView =
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mRealView
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? reinterpret_cast<T*>((char*)mRealView + (offset - alignedOffset))
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: nullptr;
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}
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~RVAMap() {
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if (mRealView) {
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::UnmapViewOfFile(mRealView);
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}
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}
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operator const T*() const { return mMappedView; }
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const T* operator->() const { return mMappedView; }
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private:
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const T* mMappedView;
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void* mRealView;
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};
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uint32_t GetExecutableArchitecture(const wchar_t* aPath) {
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nsAutoHandle file(::CreateFileW(aPath, GENERIC_READ, FILE_SHARE_READ, nullptr,
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OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
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nullptr));
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if (!file) {
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return base::PROCESS_ARCH_INVALID;
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}
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nsAutoHandle map(
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::CreateFileMappingW(file, nullptr, PAGE_READONLY, 0, 0, nullptr));
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if (!map) {
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return base::PROCESS_ARCH_INVALID;
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}
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RVAMap<IMAGE_DOS_HEADER> peHeader(map, 0);
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if (!peHeader) {
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return base::PROCESS_ARCH_INVALID;
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}
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RVAMap<IMAGE_NT_HEADERS> ntHeader(map, peHeader->e_lfanew);
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if (!ntHeader) {
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return base::PROCESS_ARCH_INVALID;
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}
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switch (ntHeader->FileHeader.Machine) {
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case IMAGE_FILE_MACHINE_I386:
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return base::PROCESS_ARCH_I386;
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case IMAGE_FILE_MACHINE_AMD64:
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return base::PROCESS_ARCH_X86_64;
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case IMAGE_FILE_MACHINE_ARM64:
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return base::PROCESS_ARCH_ARM_64;
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case IMAGE_FILE_MACHINE_ARM:
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case IMAGE_FILE_MACHINE_ARMNT:
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case IMAGE_FILE_MACHINE_THUMB:
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return base::PROCESS_ARCH_ARM;
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default:
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return base::PROCESS_ARCH_INVALID;
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}
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}
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} // namespace mozilla
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