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d64610fed5
This patch introduces `EnumerateProcessModules` to enumerate all loaded modules in the local process so that Gecko profiler and baseprofiler can use it. Differential Revision: https://phabricator.services.mozilla.com/D115252
62 lines
2.1 KiB
C++
62 lines
2.1 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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#ifndef mozilla_WindowsEnumProcessModules_h
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#define mozilla_WindowsEnumProcessModules_h
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#include <windows.h>
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#include <psapi.h>
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#include "mozilla/FunctionRef.h"
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#include "mozilla/NativeNt.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/WinHeaderOnlyUtils.h"
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namespace mozilla {
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// Why don't we use CreateToolhelp32Snapshot instead of EnumProcessModules?
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// CreateToolhelp32Snapshot gets the ANSI versions of module path strings
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// via ntdll!RtlQueryProcessDebugInformation and stores them into a snapshot.
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// Module32FirstW/Module32NextW re-converts ANSI into Unicode, but it cannot
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// restore lost information. This means we still need GetModuleFileNameEx
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// even when we use CreateToolhelp32Snapshot, but EnumProcessModules is faster.
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inline bool EnumerateProcessModules(
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const FunctionRef<void(const wchar_t*, HMODULE)>& aCallback) {
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DWORD modulesSize;
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if (!::EnumProcessModules(nt::kCurrentProcess, nullptr, 0, &modulesSize)) {
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return false;
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}
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DWORD modulesNum = modulesSize / sizeof(HMODULE);
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UniquePtr<HMODULE[]> modules = MakeUnique<HMODULE[]>(modulesNum);
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if (!::EnumProcessModules(nt::kCurrentProcess, modules.get(),
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modulesNum * sizeof(HMODULE), &modulesSize)) {
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return false;
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}
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// The list may have shrunk between calls
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if (modulesSize / sizeof(HMODULE) < modulesNum) {
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modulesNum = modulesSize / sizeof(HMODULE);
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}
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for (DWORD i = 0; i < modulesNum; ++i) {
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UniquePtr<wchar_t[]> modulePath = GetFullModulePath(modules[i]);
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if (!modulePath) {
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continue;
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}
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// Please note that modules[i] could be invalid if the module
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// was unloaded after GetFullModulePath succeeded.
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aCallback(modulePath.get(), modules[i]);
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}
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return true;
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}
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} // namespace mozilla
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#endif // mozilla_WindowsEnumProcessModules_h
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