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-rw-r--r--ipc/glue/UtilityProcessImpl.cpp87
1 files changed, 87 insertions, 0 deletions
diff --git a/ipc/glue/UtilityProcessImpl.cpp b/ipc/glue/UtilityProcessImpl.cpp
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+++ b/ipc/glue/UtilityProcessImpl.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "UtilityProcessImpl.h"
+
+#include "mozilla/ipc/IOThreadChild.h"
+#include "mozilla/GeckoArgs.h"
+
+#if defined(OS_WIN) && defined(MOZ_SANDBOX)
+# include "mozilla/sandboxTarget.h"
+# include "WMF.h"
+# include "WMFDecoderModule.h"
+#endif
+
+#if defined(XP_OPENBSD) && defined(MOZ_SANDBOX)
+# include "mozilla/SandboxSettings.h"
+#endif
+
+namespace mozilla::ipc {
+
+UtilityProcessImpl::~UtilityProcessImpl() = default;
+
+#if defined(XP_WIN)
+/* static */
+void UtilityProcessImpl::LoadLibraryOrCrash(LPCWSTR aLib) {
+ HMODULE module = ::LoadLibraryW(aLib);
+ if (!module) {
+ MOZ_CRASH("Unable to preload module");
+ }
+}
+#endif // defined(XP_WIN)
+
+bool UtilityProcessImpl::Init(int aArgc, char* aArgv[]) {
+ Maybe<uint64_t> sandboxingKind = geckoargs::sSandboxingKind.Get(aArgc, aArgv);
+ if (sandboxingKind.isNothing()) {
+ return false;
+ }
+
+ if (*sandboxingKind >= SandboxingKind::COUNT) {
+ return false;
+ }
+
+#if defined(MOZ_SANDBOX) && defined(OS_WIN)
+ // We delay load winmm.dll so that its dependencies don't interfere with COM
+ // initialization when win32k is locked down. We need to load it before we
+ // lower the sandbox in processes where the policy will prevent loading.
+ LoadLibraryOrCrash(L"winmm.dll");
+
+ if (*sandboxingKind == SandboxingKind::GENERIC_UTILITY) {
+ // Preload audio generic libraries required for ffmpeg only
+ UtilityAudioDecoderParent::GenericPreloadForSandbox();
+ }
+
+ if (*sandboxingKind == SandboxingKind::UTILITY_AUDIO_DECODING_WMF
+# ifdef MOZ_WMF_MEDIA_ENGINE
+ || *sandboxingKind == SandboxingKind::MF_MEDIA_ENGINE_CDM
+# endif
+ ) {
+ UtilityAudioDecoderParent::WMFPreloadForSandbox();
+ }
+
+ // Go for it
+ mozilla::SandboxTarget::Instance()->StartSandbox();
+#elif defined(__OpenBSD__) && defined(MOZ_SANDBOX)
+ StartOpenBSDSandbox(GeckoProcessType_Utility,
+ (SandboxingKind)*sandboxingKind);
+#endif
+
+ Maybe<const char*> parentBuildID =
+ geckoargs::sParentBuildID.Get(aArgc, aArgv);
+ if (parentBuildID.isNothing()) {
+ return false;
+ }
+
+ if (!ProcessChild::InitPrefs(aArgc, aArgv)) {
+ return false;
+ }
+
+ return mUtility->Init(TakeInitialEndpoint(), nsCString(*parentBuildID),
+ *sandboxingKind);
+}
+
+void UtilityProcessImpl::CleanUp() { NS_ShutdownXPCOM(nullptr); }
+
+} // namespace mozilla::ipc