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-rw-r--r--gfx/vr/ipc/VRProcessParent.cpp246
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diff --git a/gfx/vr/ipc/VRProcessParent.cpp b/gfx/vr/ipc/VRProcessParent.cpp
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+++ b/gfx/vr/ipc/VRProcessParent.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 "VRProcessParent.h"
+#include "VRGPUChild.h"
+#include "VRProcessManager.h"
+#include "mozilla/dom/ContentParent.h"
+#include "mozilla/dom/MemoryReportRequest.h"
+#include "mozilla/gfx/GPUProcessManager.h"
+#include "mozilla/gfx/GPUChild.h"
+#include "mozilla/ipc/Endpoint.h"
+#include "mozilla/ipc/ProcessChild.h"
+#include "mozilla/ipc/ProcessUtils.h"
+#include "mozilla/ipc/ProtocolTypes.h"
+#include "mozilla/ipc/ProtocolUtils.h" // for IToplevelProtocol
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "mozilla/TimeStamp.h" // for TimeStamp
+#include "mozilla/Unused.h"
+#include "VRChild.h"
+#include "VRThread.h"
+
+#include "nsAppRunner.h" // for IToplevelProtocol
+
+using std::string;
+using std::vector;
+
+using namespace mozilla::ipc;
+
+namespace mozilla {
+namespace gfx {
+
+VRProcessParent::VRProcessParent(Listener* aListener)
+ : GeckoChildProcessHost(GeckoProcessType_VR),
+ mTaskFactory(this),
+ mListener(aListener),
+ mLaunchPhase(LaunchPhase::Unlaunched),
+ mChannelClosed(false),
+ mShutdownRequested(false) {}
+
+VRProcessParent::~VRProcessParent() = default;
+
+bool VRProcessParent::Launch() {
+ MOZ_ASSERT(mLaunchPhase == LaunchPhase::Unlaunched);
+ MOZ_ASSERT(!mVRChild);
+ mLaunchThread = NS_GetCurrentThread();
+
+ mLaunchPhase = LaunchPhase::Waiting;
+
+ std::vector<std::string> extraArgs;
+ ProcessChild::AddPlatformBuildID(extraArgs);
+
+ mPrefSerializer = MakeUnique<ipc::SharedPreferenceSerializer>();
+ if (!mPrefSerializer->SerializeToSharedMemory(GeckoProcessType_VR,
+ /* remoteType */ ""_ns)) {
+ return false;
+ }
+ mPrefSerializer->AddSharedPrefCmdLineArgs(*this, extraArgs);
+
+ if (!GeckoChildProcessHost::AsyncLaunch(extraArgs)) {
+ mLaunchPhase = LaunchPhase::Complete;
+ mPrefSerializer = nullptr;
+ return false;
+ }
+ return true;
+}
+
+bool VRProcessParent::WaitForLaunch() {
+ if (mLaunchPhase == LaunchPhase::Complete) {
+ return !!mVRChild;
+ }
+
+ int32_t timeoutMs =
+ StaticPrefs::dom_vr_process_startup_timeout_ms_AtStartup();
+
+ // If one of the following environment variables are set we can effectively
+ // ignore the timeout - as we can guarantee the compositor process will be
+ // terminated
+ if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS") ||
+ PR_GetEnv("MOZ_DEBUG_CHILD_PAUSE")) {
+ timeoutMs = 0;
+ }
+
+ // Our caller expects the connection to be finished after we return, so we
+ // immediately set up the IPDL actor and fire callbacks. The IO thread will
+ // still dispatch a notification to the main thread - we'll just ignore it.
+ bool result = GeckoChildProcessHost::WaitUntilConnected(timeoutMs);
+ result &= InitAfterConnect(result);
+ return result;
+}
+
+void VRProcessParent::Shutdown() {
+ MOZ_ASSERT(!mShutdownRequested);
+ mListener = nullptr;
+
+ if (mVRChild) {
+ // The channel might already be closed if we got here unexpectedly.
+ if (!mChannelClosed) {
+ mVRChild->Close();
+ }
+ // OnChannelClosed uses this to check if the shutdown was expected or
+ // unexpected.
+ mShutdownRequested = true;
+
+#ifndef NS_FREE_PERMANENT_DATA
+ // No need to communicate shutdown, the VR process doesn't need to
+ // communicate anything back.
+ KillHard("NormalShutdown");
+#endif
+
+ // If we're shutting down unexpectedly, we're in the middle of handling an
+ // ActorDestroy for PVRChild, which is still on the stack. We'll return
+ // back to OnChannelClosed.
+ //
+ // Otherwise, we'll wait for OnChannelClose to be called whenever PVRChild
+ // acknowledges shutdown.
+ return;
+ }
+
+ DestroyProcess();
+}
+
+void VRProcessParent::DestroyProcess() {
+ if (mLaunchThread) {
+ // Cancel all tasks. We don't want anything triggering after our caller
+ // expects this to go away.
+ {
+ MonitorAutoLock lock(mMonitor);
+ mTaskFactory.RevokeAll();
+ }
+
+ mLaunchThread->Dispatch(NS_NewRunnableFunction("DestroyProcessRunnable",
+ [this] { Destroy(); }));
+ }
+}
+
+bool VRProcessParent::InitAfterConnect(bool aSucceeded) {
+ MOZ_ASSERT(mLaunchPhase == LaunchPhase::Waiting);
+ MOZ_ASSERT(!mVRChild);
+
+ mLaunchPhase = LaunchPhase::Complete;
+ mPrefSerializer = nullptr;
+
+ if (aSucceeded) {
+ GPUChild* gpuChild = GPUProcessManager::Get()->GetGPUChild();
+ if (!gpuChild) {
+ NS_WARNING(
+ "GPU process haven't connected with the parent process yet"
+ "when creating VR process.");
+ return false;
+ }
+
+ if (!StaticPrefs::dom_vr_enabled() &&
+ !StaticPrefs::dom_vr_webxr_enabled()) {
+ NS_WARNING("VR is not enabled when trying to create a VRChild");
+ return false;
+ }
+
+ mVRChild = MakeRefPtr<VRChild>(this);
+
+ DebugOnly<bool> rv = TakeInitialEndpoint().Bind(mVRChild.get());
+ MOZ_ASSERT(rv);
+
+ mVRChild->Init();
+
+ if (mListener) {
+ mListener->OnProcessLaunchComplete(this);
+ }
+
+ // Make vr-gpu process connection
+ Endpoint<PVRGPUChild> vrGPUBridge;
+ VRProcessManager* vpm = VRProcessManager::Get();
+ DebugOnly<bool> opened =
+ vpm->CreateGPUBridges(gpuChild->OtherPid(), &vrGPUBridge);
+ MOZ_ASSERT(opened);
+
+ Unused << gpuChild->SendInitVR(std::move(vrGPUBridge));
+ }
+
+ return true;
+}
+
+void VRProcessParent::KillHard(const char* aReason) {
+ ProcessHandle handle = GetChildProcessHandle();
+ if (!base::KillProcess(handle, base::PROCESS_END_KILLED_BY_USER)) {
+ NS_WARNING("failed to kill subprocess!");
+ }
+
+ SetAlreadyDead();
+}
+
+void VRProcessParent::OnChannelError() {
+ MOZ_ASSERT(false, "VR process channel error.");
+}
+
+void VRProcessParent::OnChannelConnected(base::ProcessId peer_pid) {
+ MOZ_ASSERT(!NS_IsMainThread());
+
+ GeckoChildProcessHost::OnChannelConnected(peer_pid);
+
+ // Post a task to the main thread. Take the lock because mTaskFactory is not
+ // thread-safe.
+ RefPtr<Runnable> runnable;
+ {
+ MonitorAutoLock lock(mMonitor);
+ runnable = mTaskFactory.NewRunnableMethod(
+ &VRProcessParent::OnChannelConnectedTask);
+ }
+ NS_DispatchToMainThread(runnable);
+}
+
+void VRProcessParent::OnChannelConnectedTask() {
+ if (mLaunchPhase == LaunchPhase::Waiting) {
+ InitAfterConnect(true);
+ }
+}
+
+void VRProcessParent::OnChannelErrorTask() {
+ if (mLaunchPhase == LaunchPhase::Waiting) {
+ InitAfterConnect(false);
+ }
+}
+
+void VRProcessParent::OnChannelClosed() {
+ mChannelClosed = true;
+ if (!mShutdownRequested && mListener) {
+ // This is an unclean shutdown. Notify we're going away.
+ mListener->OnProcessUnexpectedShutdown(this);
+ } else {
+ DestroyProcess();
+ }
+
+ // Release the actor.
+ VRChild::Destroy(std::move(mVRChild));
+ MOZ_ASSERT(!mVRChild);
+}
+
+base::ProcessId VRProcessParent::OtherPid() { return mVRChild->OtherPid(); }
+
+bool VRProcessParent::IsConnected() const { return !!mVRChild; }
+
+} // namespace gfx
+} // namespace mozilla