Read internal properties [[PromiseStatus]] and [[PromiseValue]] of the promise.

src/mirror-debugger.js

 // Copyright 2006-2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Handle id counters.
 var next_handle_ = 0;
 var next_transient_handle_ = -1;
 
 // Mirror cache.
 var mirror_cache_ = [];
@@ skipping 780 matching lines @@
     if (!name) {
       name = this.className();
     }
   }
   return '#<' + name + '>';
 };
 
 
 /**
  * Return the internal properties of the value, such as [[PrimitiveValue]] of
- * scalar wrapper objects and properties of the bound function.
+ * scalar wrapper objects, properties of the bound function and properties of
+ * the promise.
  * This method is done static to be accessible from Debug API with the bare
  * values without mirrors.
  * @return {Array} array (possibly empty) of InternalProperty instances
  */
 ObjectMirror.GetInternalProperties = function(value) {
   if (IS_STRING_WRAPPER(value) || IS_NUMBER_WRAPPER(value) ||
       IS_BOOLEAN_WRAPPER(value)) {
     var primitiveValue = %_ValueOf(value);
     return [new InternalPropertyMirror("[[PrimitiveValue]]", primitiveValue)];
   } else if (IS_FUNCTION(value)) {
     var bindings = %BoundFunctionGetBindings(value);
     var result = [];
     if (bindings && IS_ARRAY(bindings)) {
       result.push(new InternalPropertyMirror("[[TargetFunction]]",
                                              bindings[0]));
       result.push(new InternalPropertyMirror("[[BoundThis]]", bindings[1]));
       var boundArgs = [];
       for (var i = 2; i < bindings.length; i++) {
         boundArgs.push(bindings[i]);
       }
       result.push(new InternalPropertyMirror("[[BoundArgs]]", boundArgs));
     }
     return result;
+  } else if (ObjectIsPromise(value)) {
+      var mirror = new PromiseMirror(value);

[Yang, 2014/05/12 12:31:42]

indentation.

+      var result = [];
+      result.push(new InternalPropertyMirror("[[PromiseStatus]]",
+                                             mirror.status()));
+      result.push(new InternalPropertyMirror("[[PromiseValue]]",
+                                             mirror.promiseValue()));
+      return result;
   }
   return [];
 }
 
 
 /**
  * Mirror object for functions.
  * @param {function} value The function object reflected by this mirror.
  * @constructor
  * @extends ObjectMirror
@@ skipping 1881 matching lines @@
   }
   if (!NUMBER_IS_FINITE(value)) {
     if (value > 0) {
       return 'Infinity';
     } else {
       return '-Infinity';
     }
   }
   return value;
 }