1 files changed, 249 insertions, 0 deletions
diff --git a/gfx/ipc/GPUProcessHost.cpp b/gfx/ipc/GPUProcessHost.cpp
new file mode 100644
index 0000000000..77cfcf300f
--- /dev/null
+++ b/gfx/ipc/GPUProcessHost.cpp
@@ -0,0 +1,249 @@
+/* -*- 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 "GPUProcessHost.h"
+#include "chrome/common/process_watcher.h"
+#include "gfxPlatform.h"
+#include "mozilla/dom/ContentParent.h"
+#include "mozilla/gfx/GPUChild.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/layers/SynchronousTask.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_layers.h"
+#include "VRGPUChild.h"
+#include "mozilla/ipc/ProcessUtils.h"
+#ifdef MOZ_WIDGET_ANDROID
+#  include "mozilla/java/GeckoProcessManagerWrappers.h"
+#endif
+
+namespace mozilla {
+namespace gfx {
+
+using namespace ipc;
+
+GPUProcessHost::GPUProcessHost(Listener* aListener)
+    : GeckoChildProcessHost(GeckoProcessType_GPU),
+      mListener(aListener),
+      mTaskFactory(this),
+      mLaunchPhase(LaunchPhase::Unlaunched),
+      mProcessToken(0),
+      mShutdownRequested(false),
+      mChannelClosed(false) {
+  MOZ_COUNT_CTOR(GPUProcessHost);
+}
+
+GPUProcessHost::~GPUProcessHost() { MOZ_COUNT_DTOR(GPUProcessHost); }
+
+bool GPUProcessHost::Launch(StringVector aExtraOpts) {
+  MOZ_ASSERT(mLaunchPhase == LaunchPhase::Unlaunched);
+  MOZ_ASSERT(!mGPUChild);
+  MOZ_ASSERT(!gfxPlatform::IsHeadless());
+
+  mPrefSerializer = MakeUnique<ipc::SharedPreferenceSerializer>();
+  if (!mPrefSerializer->SerializeToSharedMemory(GeckoProcessType_GPU,
+                                                /* remoteType */ ""_ns)) {
+    return false;
+  }
+  mPrefSerializer->AddSharedPrefCmdLineArgs(*this, aExtraOpts);
+
+#if defined(XP_WIN) && defined(MOZ_SANDBOX)
+  mSandboxLevel = Preferences::GetInt("security.sandbox.gpu.level");
+#endif
+
+  mLaunchPhase = LaunchPhase::Waiting;
+  mLaunchTime = TimeStamp::Now();
+
+  if (!GeckoChildProcessHost::AsyncLaunch(aExtraOpts)) {
+    mLaunchPhase = LaunchPhase::Complete;
+    mPrefSerializer = nullptr;
+    return false;
+  }
+  return true;
+}
+
+bool GPUProcessHost::WaitForLaunch() {
+  if (mLaunchPhase == LaunchPhase::Complete) {
+    return !!mGPUChild;
+  }
+
+  int32_t timeoutMs =
+      StaticPrefs::layers_gpu_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);
+  InitAfterConnect(result);
+  return result;
+}
+
+void GPUProcessHost::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(&GPUProcessHost::OnChannelConnectedTask);
+  }
+  NS_DispatchToMainThread(runnable);
+}
+
+void GPUProcessHost::OnChannelConnectedTask() {
+  if (mLaunchPhase == LaunchPhase::Waiting) {
+    InitAfterConnect(true);
+  }
+}
+
+void GPUProcessHost::OnChannelErrorTask() {
+  if (mLaunchPhase == LaunchPhase::Waiting) {
+    InitAfterConnect(false);
+  }
+}
+
+static uint64_t sProcessTokenCounter = 0;
+
+void GPUProcessHost::InitAfterConnect(bool aSucceeded) {
+  MOZ_ASSERT(mLaunchPhase == LaunchPhase::Waiting);
+  MOZ_ASSERT(!mGPUChild);
+
+  mLaunchPhase = LaunchPhase::Complete;
+  mPrefSerializer = nullptr;
+
+  if (aSucceeded) {
+    mProcessToken = ++sProcessTokenCounter;
+    mGPUChild = MakeRefPtr<GPUChild>(this);
+    DebugOnly<bool> rv = TakeInitialEndpoint().Bind(mGPUChild.get());
+    MOZ_ASSERT(rv);
+
+    mGPUChild->Init();
+
+#ifdef MOZ_WIDGET_ANDROID
+    nsCOMPtr<nsIEventTarget> launcherThread(GetIPCLauncher());
+    MOZ_ASSERT(launcherThread);
+    layers::SynchronousTask task(
+        "GeckoProcessManager::GetCompositorSurfaceManager");
+
+    launcherThread->Dispatch(NS_NewRunnableFunction(
+        "GeckoProcessManager::GetCompositorSurfaceManager", [&]() {
+          layers::AutoCompleteTask complete(&task);
+          mCompositorSurfaceManager =
+              java::GeckoProcessManager::GetCompositorSurfaceManager();
+        }));
+
+    task.Wait();
+#endif
+  }
+
+  if (mListener) {
+    mListener->OnProcessLaunchComplete(this);
+  }
+}
+
+void GPUProcessHost::Shutdown(bool aUnexpectedShutdown) {
+  MOZ_ASSERT(!mShutdownRequested);
+
+  mListener = nullptr;
+
+  if (mGPUChild) {
+    // OnChannelClosed uses this to check if the shutdown was expected or
+    // unexpected.
+    mShutdownRequested = true;
+
+    if (aUnexpectedShutdown) {
+      mGPUChild->OnUnexpectedShutdown();
+    }
+
+    // The channel might already be closed if we got here unexpectedly.
+    if (!mChannelClosed) {
+      if (VRGPUChild::IsCreated()) {
+        VRGPUChild::Get()->Close();
+      }
+      mGPUChild->SendShutdownVR();
+      mGPUChild->Close();
+    }
+
+#ifndef NS_FREE_PERMANENT_DATA
+    // No need to communicate shutdown, the GPU 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 PGPUChild, which is still on the stack. We'll return
+    // back to OnChannelClosed.
+    //
+    // Otherwise, we'll wait for OnChannelClose to be called whenever PGPUChild
+    // acknowledges shutdown.
+    return;
+  }
+
+  DestroyProcess();
+}
+
+void GPUProcessHost::OnChannelClosed() {
+  mChannelClosed = true;
+
+  if (!mShutdownRequested && mListener) {
+    // This is an unclean shutdown. Notify our listener that we're going away.
+    mListener->OnProcessUnexpectedShutdown(this);
+  } else {
+    DestroyProcess();
+  }
+
+  // Release the actor.
+  GPUChild::Destroy(std::move(mGPUChild));
+  MOZ_ASSERT(!mGPUChild);
+}
+
+void GPUProcessHost::KillHard(const char* aReason) {
+  ProcessHandle handle = GetChildProcessHandle();
+  if (!base::KillProcess(handle, base::PROCESS_END_KILLED_BY_USER)) {
+    NS_WARNING("failed to kill subprocess!");
+  }
+
+  SetAlreadyDead();
+}
+
+uint64_t GPUProcessHost::GetProcessToken() const { return mProcessToken; }
+
+void GPUProcessHost::KillProcess() { KillHard("DiagnosticKill"); }
+
+void GPUProcessHost::CrashProcess() { mGPUChild->SendCrashProcess(); }
+
+void GPUProcessHost::DestroyProcess() {
+  // Cancel all tasks. We don't want anything triggering after our caller
+  // expects this to go away.
+  {
+    MonitorAutoLock lock(mMonitor);
+    mTaskFactory.RevokeAll();
+  }
+
+  GetCurrentSerialEventTarget()->Dispatch(
+      NS_NewRunnableFunction("DestroyProcessRunnable", [this] { Destroy(); }));
+}
+
+#ifdef MOZ_WIDGET_ANDROID
+java::CompositorSurfaceManager::Param
+GPUProcessHost::GetCompositorSurfaceManager() {
+  return mCompositorSurfaceManager;
+}
+#endif
+
+}  // namespace gfx
+}  // namespace mozilla