Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 831 insertions, 0 deletions

diff --git a/gfx/ipc/GPUParent.cpp b/gfx/ipc/GPUParent.cpp
new file mode 100644
index 0000000000..283fb87ee9
--- /dev/null
+++ b/gfx/ipc/GPUParent.cpp
@@ -0,0 +1,831 @@
+/* -*- 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/. */
+
+#ifdef XP_WIN
+#  include "WMF.h"
+#  include "WMFDecoderModule.h"
+#endif
+#include "GLContextProvider.h"
+#include "GPUParent.h"
+#include "GPUProcessHost.h"
+#include "GPUProcessManager.h"
+#include "gfxGradientCache.h"
+#include "GfxInfoBase.h"
+#include "VRGPUChild.h"
+#include "VRManager.h"
+#include "VRManagerParent.h"
+#include "VsyncBridgeParent.h"
+#include "cairo.h"
+#include "gfxConfig.h"
+#include "gfxCrashReporterUtils.h"
+#include "gfxPlatform.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Components.h"
+#include "mozilla/FOGIPC.h"
+#include "mozilla/HangDetails.h"
+#include "mozilla/PerfStats.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/ProcessPriorityManager.h"
+#include "mozilla/RemoteDecoderManagerChild.h"
+#include "mozilla/RemoteDecoderManagerParent.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "mozilla/StaticPrefs_media.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/dom/MemoryReportRequest.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/CanvasRenderThread.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/glean/GleanMetrics.h"
+#include "mozilla/image/ImageMemoryReporter.h"
+#include "mozilla/ipc/CrashReporterClient.h"
+#include "mozilla/ipc/ProcessChild.h"
+#include "mozilla/ipc/ProcessUtils.h"
+#include "mozilla/layers/APZInputBridgeParent.h"
+#include "mozilla/layers/APZPublicUtils.h"  // for apz::InitializeGlobalState
+#include "mozilla/layers/APZThreadUtils.h"
+#include "mozilla/layers/CompositorBridgeParent.h"
+#include "mozilla/layers/CompositorManagerParent.h"
+#include "mozilla/layers/CompositorThread.h"
+#include "mozilla/layers/ImageBridgeParent.h"
+#include "mozilla/layers/LayerTreeOwnerTracker.h"
+#include "mozilla/layers/RemoteTextureMap.h"
+#include "mozilla/layers/UiCompositorControllerParent.h"
+#include "mozilla/layers/VideoBridgeParent.h"
+#include "mozilla/webrender/RenderThread.h"
+#include "mozilla/webrender/WebRenderAPI.h"
+#include "nsDebugImpl.h"
+#include "nsIGfxInfo.h"
+#include "nsIXULRuntime.h"
+#include "nsThreadManager.h"
+#include "nscore.h"
+#include "prenv.h"
+#include "skia/include/core/SkGraphics.h"
+#if defined(XP_WIN)
+#  include <dwrite.h>
+#  include <process.h>
+#  include <windows.h>
+
+#  include "gfxDWriteFonts.h"
+#  include "gfxWindowsPlatform.h"
+#  include "mozilla/WindowsVersion.h"
+#  include "mozilla/gfx/DeviceManagerDx.h"
+#  include "mozilla/layers/GpuProcessD3D11TextureMap.h"
+#  include "mozilla/layers/GpuProcessD3D11QueryMap.h"
+#  include "mozilla/layers/TextureD3D11.h"
+#  include "mozilla/widget/WinCompositorWindowThread.h"
+#  include "MediaCodecsSupport.h"
+#  include "WMFDecoderModule.h"
+#else
+#  include <unistd.h>
+#endif
+#ifdef MOZ_WIDGET_GTK
+#  include <gtk/gtk.h>
+
+#  include "skia/include/ports/SkTypeface_cairo.h"
+#endif
+#ifdef ANDROID
+#  include "mozilla/layers/AndroidHardwareBuffer.h"
+#  include "skia/include/ports/SkTypeface_cairo.h"
+#endif
+#include "ChildProfilerController.h"
+#include "nsAppRunner.h"
+
+#if defined(MOZ_SANDBOX) && defined(MOZ_DEBUG) && defined(ENABLE_TESTS)
+#  include "mozilla/SandboxTestingChild.h"
+#endif
+
+namespace mozilla::gfx {
+
+using namespace ipc;
+using namespace layers;
+
+static GPUParent* sGPUParent;
+
+static void ReportHardwareMediaCodecSupportIfNeeded() {
+  // We only need to report the result once.
+  static bool sReported = false;
+  if (sReported) {
+    return;
+  }
+#if defined(XP_WIN)
+  NS_GetCurrentThread()->Dispatch(NS_NewRunnableFunction(
+      "GPUParent:ReportHardwareMediaCodecSupportIfNeeded", []() {
+        // Only report telemetry when hardware decoding is available.
+        if (!gfx::gfxVars::IsInitialized() ||
+            !gfx::gfxVars::CanUseHardwareVideoDecoding()) {
+          return;
+        }
+        sReported = true;
+
+        // TODO : we can remove this after HEVC is enabled by default.
+        // HEVC is not enabled. We need to force to enable it in order to know
+        // its support as well, and it would be turn off later.
+        if (StaticPrefs::media_wmf_hevc_enabled() != 1) {
+          WMFDecoderModule::Init(WMFDecoderModule::Config::ForceEnableHEVC);
+        }
+        const auto support = PDMFactory::Supported(true /* force refresh */);
+        if (support.contains(
+                mozilla::media::MediaCodecsSupport::H264HardwareDecode)) {
+          Telemetry::ScalarSet(
+              Telemetry::ScalarID::MEDIA_DEVICE_HARDWARE_DECODING_SUPPORT,
+              u"h264"_ns, true);
+        }
+        if (support.contains(
+                mozilla::media::MediaCodecsSupport::VP8HardwareDecode)) {
+          Telemetry::ScalarSet(
+              Telemetry::ScalarID::MEDIA_DEVICE_HARDWARE_DECODING_SUPPORT,
+              u"vp8"_ns, true);
+        }
+        if (support.contains(
+                mozilla::media::MediaCodecsSupport::VP9HardwareDecode)) {
+          Telemetry::ScalarSet(
+              Telemetry::ScalarID::MEDIA_DEVICE_HARDWARE_DECODING_SUPPORT,
+              u"vp9"_ns, true);
+        }
+        if (support.contains(
+                mozilla::media::MediaCodecsSupport::AV1HardwareDecode)) {
+          Telemetry::ScalarSet(
+              Telemetry::ScalarID::MEDIA_DEVICE_HARDWARE_DECODING_SUPPORT,
+              u"av1"_ns, true);
+        }
+        if (support.contains(
+                mozilla::media::MediaCodecsSupport::HEVCHardwareDecode)) {
+          Telemetry::ScalarSet(
+              Telemetry::ScalarID::MEDIA_DEVICE_HARDWARE_DECODING_SUPPORT,
+              u"hevc"_ns, true);
+        }
+        if (StaticPrefs::media_wmf_hevc_enabled() != 1) {
+          WMFDecoderModule::Init();
+        }
+      }));
+#endif
+  // TODO : in the future, when we have GPU procss on MacOS, then we can report
+  // HEVC usage as well.
+}
+
+GPUParent::GPUParent() : mLaunchTime(TimeStamp::Now()) { sGPUParent = this; }
+
+GPUParent::~GPUParent() { sGPUParent = nullptr; }
+
+/* static */
+GPUParent* GPUParent::GetSingleton() {
+  MOZ_DIAGNOSTIC_ASSERT(sGPUParent);
+  return sGPUParent;
+}
+
+/* static */ bool GPUParent::MaybeFlushMemory() {
+#if defined(XP_WIN) && !defined(HAVE_64BIT_BUILD)
+  MOZ_ASSERT(CompositorThreadHolder::IsInCompositorThread());
+  if (!XRE_IsGPUProcess()) {
+    return false;
+  }
+
+  MEMORYSTATUSEX stat;
+  stat.dwLength = sizeof(stat);
+  if (!GlobalMemoryStatusEx(&stat)) {
+    return false;
+  }
+
+  // We only care about virtual process memory space in the GPU process because
+  // the UI process is already watching total memory usage.
+  static const size_t kLowVirtualMemoryThreshold = 384 * 1024 * 1024;
+  bool lowMemory = stat.ullAvailVirtual < kLowVirtualMemoryThreshold;
+
+  // We suppress more than one low memory notification until we exit the
+  // condition. The UI process goes through more effort, reporting on-going
+  // memory pressure, but rather than try to manage a shared state, we just
+  // send one notification here to try to resolve it.
+  static bool sLowMemory = false;
+  if (lowMemory && !sLowMemory) {
+    NS_DispatchToMainThread(
+        NS_NewRunnableFunction("gfx::GPUParent::FlushMemory", []() -> void {
+          Unused << GPUParent::GetSingleton()->SendFlushMemory(
+              u"low-memory"_ns);
+        }));
+  }
+  sLowMemory = lowMemory;
+  return lowMemory;
+#else
+  return false;
+#endif
+}
+
+bool GPUParent::Init(mozilla::ipc::UntypedEndpoint&& aEndpoint,
+                     const char* aParentBuildID) {
+  // Initialize the thread manager before starting IPC. Otherwise, messages
+  // may be posted to the main thread and we won't be able to process them.
+  if (NS_WARN_IF(NS_FAILED(nsThreadManager::get().Init()))) {
+    return false;
+  }
+
+  // Now it's safe to start IPC.
+  if (NS_WARN_IF(!aEndpoint.Bind(this))) {
+    return false;
+  }
+
+  nsDebugImpl::SetMultiprocessMode("GPU");
+
+  // This must be checked before any IPDL message, which may hit sentinel
+  // errors due to parent and content processes having different
+  // versions.
+  MessageChannel* channel = GetIPCChannel();
+  if (channel && !channel->SendBuildIDsMatchMessage(aParentBuildID)) {
+    // We need to quit this process if the buildID doesn't match the parent's.
+    // This can occur when an update occurred in the background.
+    ProcessChild::QuickExit();
+  }
+
+  if (NS_FAILED(NS_InitMinimalXPCOM())) {
+    return false;
+  }
+
+  // Ensure the observer service exists.
+  ProcessPriorityManager::Init();
+
+  // Init crash reporter support.
+  CrashReporterClient::InitSingleton(this);
+
+  gfxConfig::Init();
+  gfxVars::Initialize();
+  gfxPlatform::InitNullMetadata();
+  // Ensure our Factory is initialised, mainly for gfx logging to work.
+  gfxPlatform::InitMoz2DLogging();
+#if defined(XP_WIN)
+  gfxWindowsPlatform::InitMemoryReportersForGPUProcess();
+  DeviceManagerDx::Init();
+  GpuProcessD3D11TextureMap::Init();
+  GpuProcessD3D11QueryMap::Init();
+#endif
+
+  CompositorThreadHolder::Start();
+  RemoteTextureMap::Init();
+  APZThreadUtils::SetControllerThread(NS_GetCurrentThread());
+  apz::InitializeGlobalState();
+  LayerTreeOwnerTracker::Initialize();
+  CompositorBridgeParent::InitializeStatics();
+  mozilla::ipc::SetThisProcessName("GPU Process");
+
+  return true;
+}
+
+void GPUParent::NotifyDeviceReset() {
+  if (!NS_IsMainThread()) {
+    NS_DispatchToMainThread(NS_NewRunnableFunction(
+        "gfx::GPUParent::NotifyDeviceReset",
+        []() -> void { GPUParent::GetSingleton()->NotifyDeviceReset(); }));
+    return;
+  }
+
+  // Reset and reinitialize the compositor devices
+#ifdef XP_WIN
+  if (!DeviceManagerDx::Get()->MaybeResetAndReacquireDevices()) {
+    // If the device doesn't need to be reset then the device
+    // has already been reset by a previous NotifyDeviceReset message.
+    return;
+  }
+#endif
+
+  // Notify the main process that there's been a device reset
+  // and that they should reset their compositors and repaint
+  GPUDeviceData data;
+  RecvGetDeviceStatus(&data);
+  Unused << SendNotifyDeviceReset(data);
+}
+
+void GPUParent::NotifyOverlayInfo(layers::OverlayInfo aInfo) {
+  if (!NS_IsMainThread()) {
+    NS_DispatchToMainThread(NS_NewRunnableFunction(
+        "gfx::GPUParent::NotifyOverlayInfo", [aInfo]() -> void {
+          GPUParent::GetSingleton()->NotifyOverlayInfo(aInfo);
+        }));
+    return;
+  }
+  Unused << SendNotifyOverlayInfo(aInfo);
+}
+
+void GPUParent::NotifySwapChainInfo(layers::SwapChainInfo aInfo) {
+  if (!NS_IsMainThread()) {
+    NS_DispatchToMainThread(NS_NewRunnableFunction(
+        "gfx::GPUParent::NotifySwapChainInfo", [aInfo]() -> void {
+          GPUParent::GetSingleton()->NotifySwapChainInfo(aInfo);
+        }));
+    return;
+  }
+  Unused << SendNotifySwapChainInfo(aInfo);
+}
+
+void GPUParent::NotifyDisableRemoteCanvas() {
+  if (!NS_IsMainThread()) {
+    NS_DispatchToMainThread(NS_NewRunnableFunction(
+        "gfx::GPUParent::NotifyDisableRemoteCanvas", []() -> void {
+          GPUParent::GetSingleton()->NotifyDisableRemoteCanvas();
+        }));
+    return;
+  }
+  Unused << SendNotifyDisableRemoteCanvas();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInit(
+    nsTArray<GfxVarUpdate>&& vars, const DevicePrefs& devicePrefs,
+    nsTArray<LayerTreeIdMapping>&& aMappings,
+    nsTArray<GfxInfoFeatureStatus>&& aFeatures, uint32_t aWrNamespace) {
+  for (const auto& var : vars) {
+    gfxVars::ApplyUpdate(var);
+  }
+
+  // Inherit device preferences.
+  gfxConfig::Inherit(Feature::HW_COMPOSITING, devicePrefs.hwCompositing());
+  gfxConfig::Inherit(Feature::D3D11_COMPOSITING,
+                     devicePrefs.d3d11Compositing());
+  gfxConfig::Inherit(Feature::OPENGL_COMPOSITING, devicePrefs.oglCompositing());
+  gfxConfig::Inherit(Feature::DIRECT2D, devicePrefs.useD2D1());
+  gfxConfig::Inherit(Feature::D3D11_HW_ANGLE, devicePrefs.d3d11HwAngle());
+
+  {  // Let the crash reporter know if we've got WR enabled or not. For other
+    // processes this happens in gfxPlatform::InitWebRenderConfig.
+    ScopedGfxFeatureReporter reporter("WR",
+                                      gfxPlatform::WebRenderPrefEnabled());
+    reporter.SetSuccessful();
+  }
+
+  for (const LayerTreeIdMapping& map : aMappings) {
+    LayerTreeOwnerTracker::Get()->Map(map.layersId(), map.ownerId());
+  }
+
+  widget::GfxInfoBase::SetFeatureStatus(std::move(aFeatures));
+
+  // We bypass gfxPlatform::Init, so we must initialize any relevant libraries
+  // here that would normally be initialized there.
+  SkGraphics::Init();
+
+  bool useRemoteCanvas =
+      gfxVars::RemoteCanvasEnabled() || gfxVars::UseAcceleratedCanvas2D();
+  if (useRemoteCanvas) {
+    gfxGradientCache::Init();
+  }
+
+#if defined(XP_WIN)
+  if (gfxConfig::IsEnabled(Feature::D3D11_COMPOSITING)) {
+    if (DeviceManagerDx::Get()->CreateCompositorDevices() && useRemoteCanvas) {
+      if (DeviceManagerDx::Get()->CreateCanvasDevice()) {
+        gfxDWriteFont::InitDWriteSupport();
+      } else {
+        gfxWarning() << "Failed to create canvas device.";
+      }
+    }
+  }
+  DeviceManagerDx::Get()->CreateDirectCompositionDevice();
+  // Ensure to initialize GfxInfo
+  nsCOMPtr<nsIGfxInfo> gfxInfo = components::GfxInfo::Service();
+  Unused << gfxInfo;
+
+  Factory::EnsureDWriteFactory();
+#endif
+
+#if defined(MOZ_WIDGET_GTK)
+  char* display_name = PR_GetEnv("MOZ_GDK_DISPLAY");
+  if (!display_name) {
+    bool waylandEnabled = false;
+#  ifdef MOZ_WAYLAND
+    waylandEnabled = IsWaylandEnabled();
+#  endif
+    if (!waylandEnabled) {
+      display_name = PR_GetEnv("DISPLAY");
+    }
+  }
+  if (display_name) {
+    int argc = 3;
+    char option_name[] = "--display";
+    char* argv[] = {// argv0 is unused because g_set_prgname() was called in
+                    // XRE_InitChildProcess().
+                    nullptr, option_name, display_name, nullptr};
+    char** argvp = argv;
+    gtk_init(&argc, &argvp);
+  } else {
+    gtk_init(nullptr, nullptr);
+  }
+
+  // Ensure we have an FT library for font instantiation.
+  // This would normally be set by gfxPlatform::Init().
+  // Since we bypass that, we must do it here instead.
+  FT_Library library = Factory::NewFTLibrary();
+  MOZ_ASSERT(library);
+  Factory::SetFTLibrary(library);
+
+  // true to match gfxPlatform::FontHintingEnabled(). We must hardcode
+  // this value because we do not have a gfxPlatform instance.
+  SkInitCairoFT(true);
+
+  // Ensure that GfxInfo::Init is called on the main thread.
+  nsCOMPtr<nsIGfxInfo> gfxInfo = components::GfxInfo::Service();
+  Unused << gfxInfo;
+#endif
+
+#ifdef ANDROID
+  // Ensure we have an FT library for font instantiation.
+  // This would normally be set by gfxPlatform::Init().
+  // Since we bypass that, we must do it here instead.
+  FT_Library library = Factory::NewFTLibrary();
+  MOZ_ASSERT(library);
+  Factory::SetFTLibrary(library);
+
+  // false to match gfxAndroidPlatform::FontHintingEnabled(). We must
+  // hardcode this value because we do not have a gfxPlatform instance.
+  SkInitCairoFT(false);
+
+  if (gfxVars::UseAHardwareBufferSharedSurfaceWebglOop()) {
+    layers::AndroidHardwareBufferApi::Init();
+    layers::AndroidHardwareBufferManager::Init();
+  }
+
+#endif
+
+  // Make sure to do this *after* we update gfxVars above.
+  wr::RenderThread::Start(aWrNamespace);
+  gfx::CanvasRenderThread::Start();
+  image::ImageMemoryReporter::InitForWebRender();
+
+  VRManager::ManagerInit();
+  // Send a message to the UI process that we're done.
+  GPUDeviceData data;
+  RecvGetDeviceStatus(&data);
+  Unused << SendInitComplete(data);
+
+  // Dispatch a task to run when idle that will determine which codecs are
+  // usable. The primary goal is to determine if the media feature pack is
+  // installed.
+  MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThreadQueue(
+      NS_NewRunnableFunction(
+          "GPUParent::Supported",
+          []() {
+            auto supported = PDMFactory::Supported();
+            Unused << GPUParent::GetSingleton()->SendUpdateMediaCodecsSupported(
+                supported);
+            ReportHardwareMediaCodecSupportIfNeeded();
+          }),
+      2000 /* 2 seconds timeout */, EventQueuePriority::Idle));
+
+  Telemetry::AccumulateTimeDelta(Telemetry::GPU_PROCESS_INITIALIZATION_TIME_MS,
+                                 mLaunchTime);
+  return IPC_OK();
+}
+
+#if defined(MOZ_SANDBOX) && defined(MOZ_DEBUG) && defined(ENABLE_TESTS)
+mozilla::ipc::IPCResult GPUParent::RecvInitSandboxTesting(
+    Endpoint<PSandboxTestingChild>&& aEndpoint) {
+  if (!SandboxTestingChild::Initialize(std::move(aEndpoint))) {
+    return IPC_FAIL(
+        this, "InitSandboxTesting failed to initialise the child process.");
+  }
+  return IPC_OK();
+}
+#endif
+
+mozilla::ipc::IPCResult GPUParent::RecvInitCompositorManager(
+    Endpoint<PCompositorManagerParent>&& aEndpoint, uint32_t aNamespace) {
+  CompositorManagerParent::Create(std::move(aEndpoint), ContentParentId(),
+                                  aNamespace, /* aIsRoot */ true);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitVsyncBridge(
+    Endpoint<PVsyncBridgeParent>&& aVsyncEndpoint) {
+  mVsyncBridge = VsyncBridgeParent::Start(std::move(aVsyncEndpoint));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitImageBridge(
+    Endpoint<PImageBridgeParent>&& aEndpoint) {
+  ImageBridgeParent::CreateForGPUProcess(std::move(aEndpoint));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitVideoBridge(
+    Endpoint<PVideoBridgeParent>&& aEndpoint,
+    const layers::VideoBridgeSource& aSource) {
+  // For GPU decoding, the video bridge would be opened in
+  // `VideoBridgeChild::StartupForGPUProcess`.
+  MOZ_ASSERT(aSource == layers::VideoBridgeSource::RddProcess ||
+             aSource == layers::VideoBridgeSource::MFMediaEngineCDMProcess);
+  VideoBridgeParent::Open(std::move(aEndpoint), aSource);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitVRManager(
+    Endpoint<PVRManagerParent>&& aEndpoint) {
+  VRManagerParent::CreateForGPUProcess(std::move(aEndpoint));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitVR(
+    Endpoint<PVRGPUChild>&& aEndpoint) {
+  gfx::VRGPUChild::InitForGPUProcess(std::move(aEndpoint));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitUiCompositorController(
+    const LayersId& aRootLayerTreeId,
+    Endpoint<PUiCompositorControllerParent>&& aEndpoint) {
+  UiCompositorControllerParent::Start(aRootLayerTreeId, std::move(aEndpoint));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitAPZInputBridge(
+    const LayersId& aRootLayerTreeId,
+    Endpoint<PAPZInputBridgeParent>&& aEndpoint) {
+  APZInputBridgeParent::Create(aRootLayerTreeId, std::move(aEndpoint));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvInitProfiler(
+    Endpoint<PProfilerChild>&& aEndpoint) {
+  mProfilerController = ChildProfilerController::Create(std::move(aEndpoint));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvUpdateVar(const GfxVarUpdate& aUpdate) {
+#if defined(XP_WIN)
+  auto scopeExit = MakeScopeExit(
+      [couldUseHWDecoder = gfx::gfxVars::CanUseHardwareVideoDecoding()] {
+        if (couldUseHWDecoder != gfx::gfxVars::CanUseHardwareVideoDecoding()) {
+          // The capabilities of the system may have changed, force a refresh by
+          // re-initializing the WMF PDM.
+          WMFDecoderModule::Init();
+          Unused << GPUParent::GetSingleton()->SendUpdateMediaCodecsSupported(
+              PDMFactory::Supported(true /* force refresh */));
+          ReportHardwareMediaCodecSupportIfNeeded();
+        }
+      });
+#endif
+  gfxVars::ApplyUpdate(aUpdate);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvPreferenceUpdate(const Pref& aPref) {
+  Preferences::SetPreference(aPref);
+  return IPC_OK();
+}
+
+static void CopyFeatureChange(Feature aFeature, Maybe<FeatureFailure>* aOut) {
+  FeatureState& feature = gfxConfig::GetFeature(aFeature);
+  if (feature.DisabledByDefault() || feature.IsEnabled()) {
+    // No change:
+    //   - Disabled-by-default means the parent process told us not to use this
+    //   feature.
+    //   - Enabled means we were told to use this feature, and we didn't
+    //   discover anything
+    //     that would prevent us from doing so.
+    *aOut = Nothing();
+    return;
+  }
+
+  MOZ_ASSERT(!feature.IsEnabled());
+
+  nsCString message;
+  message.AssignASCII(feature.GetFailureMessage());
+
+  *aOut =
+      Some(FeatureFailure(feature.GetValue(), message, feature.GetFailureId()));
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvGetDeviceStatus(GPUDeviceData* aOut) {
+  CopyFeatureChange(Feature::D3D11_COMPOSITING, &aOut->d3d11Compositing());
+  CopyFeatureChange(Feature::OPENGL_COMPOSITING, &aOut->oglCompositing());
+
+#if defined(XP_WIN)
+  if (DeviceManagerDx* dm = DeviceManagerDx::Get()) {
+    D3D11DeviceStatus deviceStatus;
+    dm->ExportDeviceInfo(&deviceStatus);
+    aOut->gpuDevice() = Some(deviceStatus);
+  }
+#else
+  aOut->gpuDevice() = Nothing();
+#endif
+
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvSimulateDeviceReset() {
+#if defined(XP_WIN)
+  DeviceManagerDx::Get()->ForceDeviceReset(
+      ForcedDeviceResetReason::COMPOSITOR_UPDATED);
+#endif
+  wr::RenderThread::Get()->SimulateDeviceReset();
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvNewContentCompositorManager(
+    Endpoint<PCompositorManagerParent>&& aEndpoint,
+    const ContentParentId& aChildId, uint32_t aNamespace) {
+  CompositorManagerParent::Create(std::move(aEndpoint), aChildId, aNamespace,
+                                  /* aIsRoot */ false);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvNewContentImageBridge(
+    Endpoint<PImageBridgeParent>&& aEndpoint, const ContentParentId& aChildId) {
+  if (!ImageBridgeParent::CreateForContent(std::move(aEndpoint), aChildId)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvNewContentVRManager(
+    Endpoint<PVRManagerParent>&& aEndpoint, const ContentParentId& aChildId) {
+  if (!VRManagerParent::CreateForContent(std::move(aEndpoint), aChildId)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvNewContentRemoteDecoderManager(
+    Endpoint<PRemoteDecoderManagerParent>&& aEndpoint,
+    const ContentParentId& aChildId) {
+  if (!RemoteDecoderManagerParent::CreateForContent(std::move(aEndpoint),
+                                                    aChildId)) {
+    return IPC_FAIL_NO_REASON(this);
+  }
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvAddLayerTreeIdMapping(
+    const LayerTreeIdMapping& aMapping) {
+  LayerTreeOwnerTracker::Get()->Map(aMapping.layersId(), aMapping.ownerId());
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvRemoveLayerTreeIdMapping(
+    const LayerTreeIdMapping& aMapping) {
+  LayerTreeOwnerTracker::Get()->Unmap(aMapping.layersId(), aMapping.ownerId());
+  CompositorBridgeParent::DeallocateLayerTreeId(aMapping.layersId());
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvNotifyGpuObservers(
+    const nsCString& aTopic) {
+  nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
+  MOZ_ASSERT(obsSvc);
+  if (obsSvc) {
+    obsSvc->NotifyObservers(nullptr, aTopic.get(), nullptr);
+  }
+  return IPC_OK();
+}
+
+/* static */
+void GPUParent::GetGPUProcessName(nsACString& aStr) {
+  auto processType = XRE_GetProcessType();
+  unsigned pid = 0;
+  if (processType == GeckoProcessType_GPU) {
+    pid = getpid();
+  } else {
+    MOZ_DIAGNOSTIC_ASSERT(processType == GeckoProcessType_Default);
+    pid = GPUProcessManager::Get()->GPUProcessPid();
+  }
+
+  nsPrintfCString processName("GPU (pid %u)", pid);
+  aStr.Assign(processName);
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvRequestMemoryReport(
+    const uint32_t& aGeneration, const bool& aAnonymize,
+    const bool& aMinimizeMemoryUsage, const Maybe<FileDescriptor>& aDMDFile,
+    const RequestMemoryReportResolver& aResolver) {
+  nsAutoCString processName;
+  GetGPUProcessName(processName);
+
+  mozilla::dom::MemoryReportRequestClient::Start(
+      aGeneration, aAnonymize, aMinimizeMemoryUsage, aDMDFile, processName,
+      [&](const MemoryReport& aReport) {
+        Unused << GetSingleton()->SendAddMemoryReport(aReport);
+      },
+      aResolver);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvShutdownVR() {
+  if (StaticPrefs::dom_vr_process_enabled_AtStartup()) {
+    VRGPUChild::Shutdown();
+  }
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvUpdatePerfStatsCollectionMask(
+    const uint64_t& aMask) {
+  PerfStats::SetCollectionMask(static_cast<PerfStats::MetricMask>(aMask));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvCollectPerfStatsJSON(
+    CollectPerfStatsJSONResolver&& aResolver) {
+  aResolver(PerfStats::CollectLocalPerfStatsJSON());
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvFlushFOGData(
+    FlushFOGDataResolver&& aResolver) {
+  glean::FlushFOGData(std::move(aResolver));
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvTestTriggerMetrics(
+    TestTriggerMetricsResolver&& aResolve) {
+  mozilla::glean::test_only_ipc::a_counter.Add(nsIXULRuntime::PROCESS_TYPE_GPU);
+  aResolve(true);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult GPUParent::RecvCrashProcess() {
+  MOZ_CRASH("Deliberate GPU process crash");
+  return IPC_OK();
+}
+
+void GPUParent::ActorDestroy(ActorDestroyReason aWhy) {
+  if (AbnormalShutdown == aWhy) {
+    NS_WARNING("Shutting down GPU process early due to a crash!");
+    ProcessChild::QuickExit();
+  }
+
+  // Send the last bits of Glean data over to the main process.
+  glean::FlushFOGData(
+      [](ByteBuf&& aBuf) { glean::SendFOGData(std::move(aBuf)); });
+
+#ifndef NS_FREE_PERMANENT_DATA
+  // No point in going through XPCOM shutdown because we don't keep persistent
+  // state.
+  ProcessChild::QuickExit();
+#endif
+
+  // Wait until all RemoteDecoderManagerParent have closed.
+  mShutdownBlockers.WaitUntilClear(10 * 1000 /* 10s timeout*/)
+      ->Then(GetCurrentSerialEventTarget(), __func__, [self = RefPtr{this}]() {
+        if (self->mProfilerController) {
+          self->mProfilerController->Shutdown();
+          self->mProfilerController = nullptr;
+        }
+
+        if (self->mVsyncBridge) {
+          self->mVsyncBridge->Shutdown();
+          self->mVsyncBridge = nullptr;
+        }
+        VideoBridgeParent::Shutdown();
+        // This could be running on either the Compositor thread, the Renderer
+        // thread, or the dedicated CanvasRender thread, so we need to shutdown
+        // before the former two.
+        CanvasRenderThread::Shutdown();
+        CompositorThreadHolder::Shutdown();
+        RemoteTextureMap::Shutdown();
+        // There is a case that RenderThread exists when gfxVars::UseWebRender()
+        // is false. This could happen when WebRender was fallbacked to
+        // compositor.
+        if (wr::RenderThread::Get()) {
+          wr::RenderThread::ShutDown();
+        }
+#ifdef XP_WIN
+        if (widget::WinCompositorWindowThread::Get()) {
+          widget::WinCompositorWindowThread::ShutDown();
+        }
+#endif
+
+        image::ImageMemoryReporter::ShutdownForWebRender();
+
+        // Shut down the default GL context provider.
+        gl::GLContextProvider::Shutdown();
+
+#if defined(XP_WIN)
+        // The above shutdown calls operate on the available context providers
+        // on most platforms.  Windows is a "special snowflake", though, and has
+        // three context providers available, so we have to shut all of them
+        // down. We should only support the default GL provider on Windows;
+        // then, this could go away. Unfortunately, we currently support WGL
+        // (the default) for WebGL on Optimus.
+        gl::GLContextProviderEGL::Shutdown();
+#endif
+
+        Factory::ShutDown();
+
+    // We bypass gfxPlatform shutdown, so we must shutdown any libraries here
+    // that would normally be handled by it.
+#ifdef NS_FREE_PERMANENT_DATA
+        SkGraphics::PurgeFontCache();
+        cairo_debug_reset_static_data();
+#endif
+
+#if defined(XP_WIN)
+        GpuProcessD3D11QueryMap::Shutdown();
+        GpuProcessD3D11TextureMap::Shutdown();
+        DeviceManagerDx::Shutdown();
+#endif
+        LayerTreeOwnerTracker::Shutdown();
+        gfxVars::Shutdown();
+        gfxConfig::Shutdown();
+        CrashReporterClient::DestroySingleton();
+        XRE_ShutdownChildProcess();
+      });
+}
+
+}  // namespace mozilla::gfx