[promisehook] Implement PromiseHook

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 3a8b071099b84aa883f5c87a91034a67d701b82e..e79f9568ef5bc51b8d6ae4332ad85e407c6fb742 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -5756,6 +5756,11 @@ typedef void (*BeforeCallEnteredCallback)(Isolate*);
 typedef void (*CallCompletedCallback)(Isolate*);
 typedef void (*DeprecatedCallCompletedCallback)();
 
+enum class PromiseHookType { kInit, kResolve, kBefore, kAfter };

[jochen (gone - plz use gerrit), 2016/12/16 09:36:41]

can you please add a comment explaining the different types?

[gsathya, 2016/12/16 18:04:25]

Done.

+
+typedef void (*PromiseHook)(PromiseHookType type, Local<Promise> promise,

[jochen (gone - plz use gerrit), 2016/12/16 09:36:41]

same here, what is parent?

[gsathya, 2016/12/16 18:04:25]

Done.

+                            Local<Value> parent);
+
 // --- Promise Reject Callback ---
 enum PromiseRejectEvent {
   kPromiseRejectWithNoHandler = 0,
@@ -6867,6 +6872,12 @@ class V8_EXPORT Isolate {
           DeprecatedCallCompletedCallback callback));
 
   /**
+   * Experimental: Set the PromiseHook callback for various promise
+   * lifecycle events.
+   */
+  void SetPromiseHook(PromiseHook hook);
+
+  /**
    * Set callback to notify about promise reject with no handler, or
    * revocation of such a previous notification once the handler is added.
    */