1 files changed, 108 insertions, 0 deletions
diff --git a/dom/promise/PromiseDebugging.h b/dom/promise/PromiseDebugging.h
new file mode 100644
index 0000000000..218a64c2eb
--- /dev/null
+++ b/dom/promise/PromiseDebugging.h
@@ -0,0 +1,108 @@
+/* -*- 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_dom_PromiseDebugging_h
+#define mozilla_dom_PromiseDebugging_h
+
+#include "js/TypeDecls.h"
+#include "nsTArray.h"
+#include "mozilla/RefPtr.h"
+
+namespace mozilla {
+
+class ErrorResult;
+
+namespace dom {
+namespace workers {
+class WorkerPrivate;
+} // namespace workers
+
+class Promise;
+struct PromiseDebuggingStateHolder;
+class GlobalObject;
+class UncaughtRejectionObserver;
+class FlushRejections;
+
+void TriggerFlushRejections();
+
+class PromiseDebugging
+{
+public:
+  static void Init();
+  static void Shutdown();
+
+  static void GetState(GlobalObject&, JS::Handle<JSObject*> aPromise,
+                       PromiseDebuggingStateHolder& aState,
+                       ErrorResult& aRv);
+
+  static void GetPromiseID(GlobalObject&, JS::Handle<JSObject*>, nsString&,
+                           ErrorResult&);
+
+  static void GetAllocationStack(GlobalObject&, JS::Handle<JSObject*> aPromise,
+                                 JS::MutableHandle<JSObject*> aStack,
+                                 ErrorResult& aRv);
+  static void GetRejectionStack(GlobalObject&, JS::Handle<JSObject*> aPromise,
+                                JS::MutableHandle<JSObject*> aStack,
+                                ErrorResult& aRv);
+  static void GetFullfillmentStack(GlobalObject&,
+                                   JS::Handle<JSObject*> aPromise,
+                                   JS::MutableHandle<JSObject*> aStack,
+                                   ErrorResult& aRv);
+
+#ifndef SPIDERMONKEY_PROMISE
+  static void GetDependentPromises(GlobalObject&,
+                                   JS::Handle<JSObject*> aPromise,
+                                   nsTArray<RefPtr<Promise>>& aPromises,
+                                   ErrorResult& aRv);
+  static double GetPromiseLifetime(GlobalObject&,
+                                   JS::Handle<JSObject*> aPromise,
+                                   ErrorResult& aRv);
+  static double GetTimeToSettle(GlobalObject&, JS::Handle<JSObject*> aPromise,
+                                ErrorResult& aRv);
+#endif // SPIDERMONKEY_PROMISE
+
+  // Mechanism for watching uncaught instances of Promise.
+  static void AddUncaughtRejectionObserver(GlobalObject&,
+                                           UncaughtRejectionObserver& aObserver);
+  static bool RemoveUncaughtRejectionObserver(GlobalObject&,
+                                              UncaughtRejectionObserver& aObserver);
+
+#ifdef SPIDERMONKEY_PROMISE
+  // Mark a Promise as having been left uncaught at script completion.
+  static void AddUncaughtRejection(JS::HandleObject);
+  // Mark a Promise previously added with `AddUncaughtRejection` as
+  // eventually consumed.
+  static void AddConsumedRejection(JS::HandleObject);
+#else
+  // Mark a Promise as having been left uncaught at script completion.
+  static void AddUncaughtRejection(Promise&);
+  // Mark a Promise previously added with `AddUncaughtRejection` as
+  // eventually consumed.
+  static void AddConsumedRejection(Promise&);
+#endif // SPIDERMONKEY_PROMISE
+  // Propagate the informations from AddUncaughtRejection
+  // and AddConsumedRejection to observers.
+  static void FlushUncaughtRejections();
+
+protected:
+  static void FlushUncaughtRejectionsInternal();
+  friend class FlushRejections;
+  friend class mozilla::dom::workers::WorkerPrivate;
+private:
+  // Identity of the process.
+  // This property is:
+  // - set during initialization of the layout module,
+  // prior to any Worker using it;
+  // - read by both the main thread and the Workers;
+  // - unset during shutdown of the layout module,
+  // after any Worker has been shutdown.
+  static nsString sIDPrefix;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_PromiseDebugging_h