Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 385 insertions, 0 deletions

diff --git a/gfx/layers/ipc/SharedSurfacesParent.cpp b/gfx/layers/ipc/SharedSurfacesParent.cpp
new file mode 100644
index 0000000000..73d985db4c
--- /dev/null
+++ b/gfx/layers/ipc/SharedSurfacesParent.cpp
@@ -0,0 +1,385 @@
+/* -*- 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 "SharedSurfacesParent.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/StaticPrefs_image.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/gfx/GPUProcessManager.h"
+#include "mozilla/layers/SharedSurfacesMemoryReport.h"
+#include "mozilla/layers/SourceSurfaceSharedData.h"
+#include "mozilla/layers/CompositorThread.h"
+#include "mozilla/webrender/RenderSharedSurfaceTextureHost.h"
+#include "mozilla/webrender/RenderThread.h"
+#include "nsThreadUtils.h"  // for GetCurrentSerialEventTarget
+
+namespace mozilla {
+namespace layers {
+
+using namespace mozilla::gfx;
+
+StaticMonitor SharedSurfacesParent::sMonitor;
+StaticAutoPtr<SharedSurfacesParent> SharedSurfacesParent::sInstance;
+
+// Short wait to allow for a surface to be added, where the consumer has a
+// different thread route.
+static const TimeDuration kGetTimeout = TimeDuration::FromMilliseconds(50);
+
+void SharedSurfacesParent::MappingTracker::NotifyExpiredLocked(
+    SourceSurfaceSharedDataWrapper* aSurface,
+    const StaticMonitorAutoLock& aAutoLock) {
+  RemoveObjectLocked(aSurface, aAutoLock);
+  mExpired.AppendElement(aSurface);
+}
+
+void SharedSurfacesParent::MappingTracker::TakeExpired(
+    nsTArray<RefPtr<gfx::SourceSurfaceSharedDataWrapper>>& aExpired,
+    const StaticMonitorAutoLock& aAutoLock) {
+  aExpired = std::move(mExpired);
+}
+
+void SharedSurfacesParent::MappingTracker::NotifyHandlerEnd() {
+  nsTArray<RefPtr<gfx::SourceSurfaceSharedDataWrapper>> expired;
+  {
+    StaticMonitorAutoLock lock(sMonitor);
+    TakeExpired(expired, lock);
+  }
+
+  SharedSurfacesParent::ExpireMap(expired);
+}
+
+SharedSurfacesParent::SharedSurfacesParent()
+    : mTracker(
+          StaticPrefs::image_mem_shared_unmap_min_expiration_ms_AtStartup(),
+          mozilla::GetCurrentSerialEventTarget()) {}
+
+/* static */
+void SharedSurfacesParent::Initialize() {
+  MOZ_ASSERT(NS_IsMainThread());
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    sInstance = new SharedSurfacesParent();
+  }
+}
+
+/* static */
+void SharedSurfacesParent::ShutdownRenderThread() {
+  // The main thread should blocked on waiting for the render thread to
+  // complete so this should be safe to release off the main thread.
+  MOZ_ASSERT(wr::RenderThread::IsInRenderThread());
+  StaticMonitorAutoLock lock(sMonitor);
+  MOZ_ASSERT(sInstance);
+
+  for (const auto& key : sInstance->mSurfaces.Keys()) {
+    // There may be lingering consumers of the surfaces that didn't get shutdown
+    // yet but since we are here, we know the render thread is finished and we
+    // can unregister everything.
+    wr::RenderThread::Get()->UnregisterExternalImageDuringShutdown(
+        wr::ToExternalImageId(key));
+  }
+}
+
+/* static */
+void SharedSurfacesParent::Shutdown() {
+  // The compositor thread and render threads are shutdown, so this is the last
+  // thread that could use it. The expiration tracker needs to be freed on the
+  // main thread.
+  MOZ_ASSERT(NS_IsMainThread());
+  StaticMonitorAutoLock lock(sMonitor);
+  sInstance = nullptr;
+}
+
+/* static */
+already_AddRefed<DataSourceSurface> SharedSurfacesParent::Get(
+    const wr::ExternalImageId& aId) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    gfxCriticalNote << "SSP:Get " << wr::AsUint64(aId) << " shtd";
+    return nullptr;
+  }
+
+  RefPtr<SourceSurfaceSharedDataWrapper> surface;
+  while (
+      !sInstance->mSurfaces.Get(wr::AsUint64(aId), getter_AddRefs(surface))) {
+    CVStatus status = lock.Wait(kGetTimeout);
+    if (status == CVStatus::Timeout) {
+      return nullptr;
+    }
+  }
+  return surface.forget();
+}
+
+/* static */
+already_AddRefed<DataSourceSurface> SharedSurfacesParent::Acquire(
+    const wr::ExternalImageId& aId) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    gfxCriticalNote << "SSP:Acq " << wr::AsUint64(aId) << " shtd";
+    return nullptr;
+  }
+
+  RefPtr<SourceSurfaceSharedDataWrapper> surface;
+  sInstance->mSurfaces.Get(wr::AsUint64(aId), getter_AddRefs(surface));
+
+  if (surface) {
+    DebugOnly<bool> rv = surface->AddConsumer();
+    MOZ_ASSERT(!rv);
+  }
+  return surface.forget();
+}
+
+/* static */
+bool SharedSurfacesParent::Release(const wr::ExternalImageId& aId,
+                                   bool aForCreator) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    return false;
+  }
+
+  uint64_t id = wr::AsUint64(aId);
+  RefPtr<SourceSurfaceSharedDataWrapper> surface;
+  sInstance->mSurfaces.Get(wr::AsUint64(aId), getter_AddRefs(surface));
+  if (!surface) {
+    return false;
+  }
+
+  if (surface->RemoveConsumer(aForCreator)) {
+    RemoveTrackingLocked(surface, lock);
+    wr::RenderThread::Get()->UnregisterExternalImage(wr::ToExternalImageId(id));
+    sInstance->mSurfaces.Remove(id);
+  }
+
+  return true;
+}
+
+/* static */
+void SharedSurfacesParent::AddSameProcess(const wr::ExternalImageId& aId,
+                                          SourceSurfaceSharedData* aSurface) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    gfxCriticalNote << "SSP:Ads " << wr::AsUint64(aId) << " shtd";
+    return;
+  }
+
+  // If the child bridge detects it is in the combined UI/GPU process, then it
+  // will insert a wrapper surface holding the shared memory buffer directly.
+  // This is good because we avoid mapping the same shared memory twice, but
+  // still allow the original surface to be freed and remove the wrapper from
+  // the table when it is no longer needed.
+  RefPtr<SourceSurfaceSharedDataWrapper> surface =
+      new SourceSurfaceSharedDataWrapper();
+  surface->Init(aSurface);
+
+  uint64_t id = wr::AsUint64(aId);
+  MOZ_ASSERT(!sInstance->mSurfaces.Contains(id));
+
+  auto texture = MakeRefPtr<wr::RenderSharedSurfaceTextureHost>(surface);
+  wr::RenderThread::Get()->RegisterExternalImage(aId, texture.forget());
+
+  surface->AddConsumer();
+  sInstance->mSurfaces.InsertOrUpdate(id, std::move(surface));
+  lock.NotifyAll();
+}
+
+/* static */
+void SharedSurfacesParent::DestroyProcess(base::ProcessId aPid) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    return;
+  }
+
+  // Note that the destruction of a parent may not be cheap if it still has a
+  // lot of surfaces still bound that require unmapping.
+  for (auto i = sInstance->mSurfaces.Iter(); !i.Done(); i.Next()) {
+    SourceSurfaceSharedDataWrapper* surface = i.Data();
+    if (surface->GetCreatorPid() == aPid && surface->HasCreatorRef() &&
+        surface->RemoveConsumer(/* aForCreator */ true)) {
+      RemoveTrackingLocked(surface, lock);
+      wr::RenderThread::Get()->UnregisterExternalImage(
+          wr::ToExternalImageId(i.Key()));
+      i.Remove();
+    }
+  }
+}
+
+/* static */
+void SharedSurfacesParent::Add(const wr::ExternalImageId& aId,
+                               SurfaceDescriptorShared&& aDesc,
+                               base::ProcessId aPid) {
+  MOZ_ASSERT(CompositorThreadHolder::IsInCompositorThread());
+  MOZ_ASSERT(aPid != base::GetCurrentProcId());
+
+  RefPtr<SourceSurfaceSharedDataWrapper> surface =
+      new SourceSurfaceSharedDataWrapper();
+
+  // We preferentially map in new surfaces when they are initially received
+  // because we are likely to reference them in a display list soon. The unmap
+  // will ensure we add the surface to the expiration tracker. We do it outside
+  // the mutex to ensure we always lock the surface mutex first, and our mutex
+  // second, to avoid deadlock.
+  //
+  // Note that the surface wrapper maps in the given handle as read only.
+  surface->Init(aDesc.size(), aDesc.stride(), aDesc.format(),
+                std::move(aDesc.handle()), aPid);
+
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    gfxCriticalNote << "SSP:Add " << wr::AsUint64(aId) << " shtd";
+    return;
+  }
+
+  uint64_t id = wr::AsUint64(aId);
+  MOZ_ASSERT(!sInstance->mSurfaces.Contains(id));
+
+  auto texture = MakeRefPtr<wr::RenderSharedSurfaceTextureHost>(surface);
+  wr::RenderThread::Get()->RegisterExternalImage(aId, texture.forget());
+
+  surface->AddConsumer();
+  sInstance->mSurfaces.InsertOrUpdate(id, std::move(surface));
+  lock.NotifyAll();
+}
+
+/* static */
+void SharedSurfacesParent::Remove(const wr::ExternalImageId& aId) {
+  DebugOnly<bool> rv = Release(aId, /* aForCreator */ true);
+  MOZ_ASSERT(rv);
+}
+
+/* static */
+void SharedSurfacesParent::AddTrackingLocked(
+    SourceSurfaceSharedDataWrapper* aSurface,
+    const StaticMonitorAutoLock& aAutoLock) {
+  MOZ_ASSERT(!aSurface->GetExpirationState()->IsTracked());
+  sInstance->mTracker.AddObjectLocked(aSurface, aAutoLock);
+}
+
+/* static */
+void SharedSurfacesParent::AddTracking(
+    SourceSurfaceSharedDataWrapper* aSurface) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    return;
+  }
+
+  AddTrackingLocked(aSurface, lock);
+}
+
+/* static */
+void SharedSurfacesParent::RemoveTrackingLocked(
+    SourceSurfaceSharedDataWrapper* aSurface,
+    const StaticMonitorAutoLock& aAutoLock) {
+  if (!aSurface->GetExpirationState()->IsTracked()) {
+    return;
+  }
+
+  sInstance->mTracker.RemoveObjectLocked(aSurface, aAutoLock);
+}
+
+/* static */
+void SharedSurfacesParent::RemoveTracking(
+    SourceSurfaceSharedDataWrapper* aSurface) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    return;
+  }
+
+  RemoveTrackingLocked(aSurface, lock);
+}
+
+/* static */
+bool SharedSurfacesParent::AgeOneGenerationLocked(
+    nsTArray<RefPtr<SourceSurfaceSharedDataWrapper>>& aExpired,
+    const StaticMonitorAutoLock& aAutoLock) {
+  if (sInstance->mTracker.IsEmptyLocked(aAutoLock)) {
+    return false;
+  }
+
+  sInstance->mTracker.AgeOneGenerationLocked(aAutoLock);
+  sInstance->mTracker.TakeExpired(aExpired, aAutoLock);
+  return true;
+}
+
+/* static */
+bool SharedSurfacesParent::AgeOneGeneration(
+    nsTArray<RefPtr<SourceSurfaceSharedDataWrapper>>& aExpired) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    return false;
+  }
+
+  return AgeOneGenerationLocked(aExpired, lock);
+}
+
+/* static */
+bool SharedSurfacesParent::AgeAndExpireOneGeneration() {
+  nsTArray<RefPtr<SourceSurfaceSharedDataWrapper>> expired;
+  bool aged = AgeOneGeneration(expired);
+  ExpireMap(expired);
+  return aged;
+}
+
+/* static */
+void SharedSurfacesParent::ExpireMap(
+    nsTArray<RefPtr<SourceSurfaceSharedDataWrapper>>& aExpired) {
+  for (auto& surface : aExpired) {
+    surface->ExpireMap();
+  }
+}
+
+/* static */
+void SharedSurfacesParent::AccumulateMemoryReport(
+    base::ProcessId aPid, SharedSurfacesMemoryReport& aReport) {
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    return;
+  }
+
+  for (const auto& entry : sInstance->mSurfaces) {
+    SourceSurfaceSharedDataWrapper* surface = entry.GetData();
+    if (surface->GetCreatorPid() == aPid) {
+      aReport.mSurfaces.insert(std::make_pair(
+          entry.GetKey(),
+          SharedSurfacesMemoryReport::SurfaceEntry{
+              aPid, surface->GetSize(), surface->Stride(),
+              surface->GetConsumers(), surface->HasCreatorRef()}));
+    }
+  }
+}
+
+/* static */
+bool SharedSurfacesParent::AccumulateMemoryReport(
+    SharedSurfacesMemoryReport& aReport) {
+  if (XRE_IsParentProcess()) {
+    GPUProcessManager* gpm = GPUProcessManager::Get();
+    if (!gpm || gpm->GPUProcessPid() != base::kInvalidProcessId) {
+      return false;
+    }
+  } else if (!XRE_IsGPUProcess()) {
+    return false;
+  }
+
+  StaticMonitorAutoLock lock(sMonitor);
+  if (!sInstance) {
+    return true;
+  }
+
+  for (const auto& entry : sInstance->mSurfaces) {
+    SourceSurfaceSharedDataWrapper* surface = entry.GetData();
+    aReport.mSurfaces.insert(std::make_pair(
+        entry.GetKey(),
+        SharedSurfacesMemoryReport::SurfaceEntry{
+            surface->GetCreatorPid(), surface->GetSize(), surface->Stride(),
+            surface->GetConsumers(), surface->HasCreatorRef()}));
+  }
+
+  return true;
+}
+
+}  // namespace layers
+}  // namespace mozilla