1 files changed, 95 insertions, 0 deletions
diff --git a/dom/ipc/ProcessHangMonitor.h b/dom/ipc/ProcessHangMonitor.h
new file mode 100644
index 0000000000..54fe35bbfc
--- /dev/null
+++ b/dom/ipc/ProcessHangMonitor.h
@@ -0,0 +1,95 @@
+/* -*- 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/. */
+
+#ifndef mozilla_ProcessHangMonitor_h
+#define mozilla_ProcessHangMonitor_h
+
+#include "mozilla/AlreadyAddRefed.h"
+#include "mozilla/Atomics.h"
+#include "nsCOMPtr.h"
+#include "nsIObserver.h"
+#include "nsIRemoteTab.h"
+#include "nsStringFwd.h"
+
+class nsIRunnable;
+class nsIBrowserChild;
+class nsIThread;
+
+namespace mozilla {
+
+namespace dom {
+class ContentParent;
+class BrowserParent;
+struct CancelContentJSOptions;
+}  // namespace dom
+
+namespace layers {
+struct LayersObserverEpoch;
+}  // namespace layers
+
+class PProcessHangMonitorParent;
+
+class ProcessHangMonitor final : public nsIObserver {
+ private:
+  ProcessHangMonitor();
+  virtual ~ProcessHangMonitor();
+
+ public:
+  static ProcessHangMonitor* Get() { return sInstance; }
+  static ProcessHangMonitor* GetOrCreate();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+
+  static PProcessHangMonitorParent* AddProcess(
+      dom::ContentParent* aContentParent);
+  static void RemoveProcess(PProcessHangMonitorParent* aParent);
+
+  static void ClearHang();
+
+  static void PaintWhileInterruptingJS(
+      PProcessHangMonitorParent* aParent, dom::BrowserParent* aTab,
+      const layers::LayersObserverEpoch& aEpoch);
+  static void ClearPaintWhileInterruptingJS(
+      const layers::LayersObserverEpoch& aEpoch);
+  static void MaybeStartPaintWhileInterruptingJS();
+
+  static void CancelContentJSExecutionIfRunning(
+      PProcessHangMonitorParent* aParent, dom::BrowserParent* aTab,
+      nsIRemoteTab::NavigationType aNavigationType,
+      const dom::CancelContentJSOptions& aCancelContentJSOptions);
+
+  enum SlowScriptAction {
+    Continue,
+    Terminate,
+    StartDebugger,
+  };
+  SlowScriptAction NotifySlowScript(nsIBrowserChild* aBrowserChild,
+                                    const char* aFileName,
+                                    const nsString& aAddonId,
+                                    const double aDuration);
+
+  void NotifyPluginHang(uint32_t aPluginId);
+
+  bool IsDebuggerStartupComplete();
+
+  void InitiateCPOWTimeout();
+  bool ShouldTimeOutCPOWs();
+
+  nsresult Dispatch(already_AddRefed<nsIRunnable> aRunnable);
+  bool IsOnThread();
+
+ private:
+  static ProcessHangMonitor* sInstance;
+
+  Atomic<bool> mCPOWTimeout;
+
+  nsCOMPtr<nsIThread> mThread;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_ProcessHangMonitor_h