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1a63fee6c2
Backed out changeset d7e12200a4a0 (bug 1865795) Backed out changeset 9efc72d1ff06 (bug 1865795)
143 lines
4.1 KiB
C++
143 lines
4.1 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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#include "UtilityProcessImpl.h"
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#include "mozilla/ipc/IOThreadChild.h"
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#include "mozilla/GeckoArgs.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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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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