0f3a88d758
Backed out changeset ce2138248319 (bug 1874689) Backed out changeset fbe9fbb6ae72 (bug 1925181) Backed out changeset c9896c8962cb (bug 1925274) Backed out changeset 6eddbad5949c (bug 1918596) Backed out changeset b9bf86fa1c74 (bug 1917844) Backed out changeset 1d4cd83d1a39 (bug 1917844) Backed out changeset 264a5140fbcb (bug 1917575) Backed out changeset 87b8512c67c9 (bug 1915152)
148 lines
4.2 KiB
C++
148 lines
4.2 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 "UtilityProcessImpl.h"
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#include "mozilla/ipc/IOThreadChild.h"
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#include "mozilla/GeckoArgs.h"
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#include "mozilla/ProcInfo.h"
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#if defined(XP_WIN)
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# include "nsExceptionHandler.h"
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#endif
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#if defined(XP_WIN) && defined(MOZ_SANDBOX)
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# include "mozilla/sandboxTarget.h"
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# include "WMF.h"
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# include "WMFDecoderModule.h"
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#endif
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#if defined(XP_OPENBSD) && defined(MOZ_SANDBOX)
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# include "mozilla/SandboxSettings.h"
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#endif
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#if defined(MOZ_WMF_CDM) && defined(MOZ_SANDBOX)
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# include "mozilla/MFCDMParent.h"
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#endif
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namespace mozilla::ipc {
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UtilityProcessImpl::~UtilityProcessImpl() = default;
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#if defined(XP_WIN)
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/* static */
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void UtilityProcessImpl::LoadLibraryOrCrash(LPCWSTR aLib) {
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// re-try a few times depending on the error we get ; inspired by both our
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// results on content process allocations as well as msys2:
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// https://github.com/git-for-windows/msys2-runtime/blob/b4fed42af089ab955286343835a97e287496b3f8/winsup/cygwin/autoload.cc#L323-L339
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const int kMaxRetries = 10;
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DWORD err;
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for (int i = 0; i < kMaxRetries; i++) {
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HMODULE module = ::LoadLibraryW(aLib);
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if (module) {
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return;
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}
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err = ::GetLastError();
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if (err != ERROR_NOACCESS && err != ERROR_DLL_INIT_FAILED) {
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break;
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}
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PR_Sleep(0);
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}
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switch (err) {
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/* case ERROR_ACCESS_DENIED: */
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/* case ERROR_BAD_EXE_FORMAT: */
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/* case ERROR_SHARING_VIOLATION: */
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case ERROR_MOD_NOT_FOUND:
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case ERROR_COMMITMENT_LIMIT:
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// We want to make it explicit in telemetry that this was in fact an
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// OOM condition, even though we could not detect it on our own
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CrashReporter::AnnotateOOMAllocationSize(1);
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break;
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default:
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break;
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}
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MOZ_CRASH_UNSAFE_PRINTF("Unable to preload module: 0x%lx", err);
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}
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#endif // defined(XP_WIN)
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bool UtilityProcessImpl::Init(int aArgc, char* aArgv[]) {
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Maybe<uint64_t> sandboxingKind = geckoargs::sSandboxingKind.Get(aArgc, aArgv);
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if (sandboxingKind.isNothing()) {
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return false;
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}
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if (*sandboxingKind >= SandboxingKind::COUNT) {
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return false;
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}
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#if defined(MOZ_SANDBOX) && defined(XP_WIN)
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// We delay load winmm.dll so that its dependencies don't interfere with COM
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// initialization when win32k is locked down. We need to load it before we
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// lower the sandbox in processes where the policy will prevent loading.
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LoadLibraryOrCrash(L"winmm.dll");
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// Call this once before enabling the sandbox, it will cache its result
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// in a static variable.
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GetCpuFrequencyMHz();
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if (*sandboxingKind == SandboxingKind::GENERIC_UTILITY) {
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// Preload audio generic libraries required for ffmpeg only
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UtilityAudioDecoderParent::GenericPreloadForSandbox();
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}
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if (*sandboxingKind == SandboxingKind::UTILITY_AUDIO_DECODING_WMF
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# ifdef MOZ_WMF_MEDIA_ENGINE
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|| *sandboxingKind == SandboxingKind::MF_MEDIA_ENGINE_CDM
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# endif
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) {
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UtilityAudioDecoderParent::WMFPreloadForSandbox();
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}
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// Go for it
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mozilla::SandboxTarget::Instance()->StartSandbox();
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#elif defined(__OpenBSD__) && defined(MOZ_SANDBOX)
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if (*sandboxingKind != SandboxingKind::GENERIC_UTILITY) {
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StartOpenBSDSandbox(GeckoProcessType_Utility,
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(SandboxingKind)*sandboxingKind);
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}
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#endif
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#if defined(MOZ_WMF_CDM) && defined(MOZ_SANDBOX)
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if (*sandboxingKind == MF_MEDIA_ENGINE_CDM) {
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Maybe<const char*> pluginPath = geckoargs::sPluginPath.Get(aArgc, aArgv);
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if (pluginPath) {
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MFCDMParent::SetWidevineL1Path(*pluginPath);
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} else {
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NS_WARNING("No Widevine L1 plugin for the utility process!");
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}
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}
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#endif
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Maybe<const char*> parentBuildID =
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geckoargs::sParentBuildID.Get(aArgc, aArgv);
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if (parentBuildID.isNothing()) {
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return false;
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}
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if (!ProcessChild::InitPrefs(aArgc, aArgv)) {
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return false;
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}
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return mUtility->Init(TakeInitialEndpoint(), nsCString(*parentBuildID),
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*sandboxingKind);
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}
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void UtilityProcessImpl::CleanUp() { NS_ShutdownXPCOM(nullptr); }
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} // namespace mozilla::ipc
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