Expose promise status through promise mirror.

src/mirror-debugger.js

 // Copyright 2006-2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 24 matching lines @@
 
 /**
  * Clear the mirror handle cache.
  */
 function ClearMirrorCache() {
   next_handle_ = 0;
   mirror_cache_ = [];
 }
 
 
+// Wrapper to check whether an object is a Promise.  The call may not work
+// if promises are not enabled.
+// TODO(yangguo): remove this wrapper once promises are enabled by default.
+function ObjectIsPromise(value) {
+  try {
+    return %IsPromise(value);
+  } catch (e) {
+    return false;
+  }
+}
+
+
 /**
  * Returns the mirror for a specified value or object.
  *
  * @param {value or Object} value the value or object to retreive the mirror for
  * @param {boolean} transient indicate whether this object is transient and
  *    should not be added to the mirror cache. The default is not transient.
  * @returns {Mirror} the mirror reflects the passed value or object
  */
 function MakeMirror(value, opt_transient) {
   var mirror;
@@ skipping 28 matching lines @@
   } else if (IS_DATE(value)) {
     mirror = new DateMirror(value);
   } else if (IS_FUNCTION(value)) {
     mirror = new FunctionMirror(value);
   } else if (IS_REGEXP(value)) {
     mirror = new RegExpMirror(value);
   } else if (IS_ERROR(value)) {
     mirror = new ErrorMirror(value);
   } else if (IS_SCRIPT(value)) {
     mirror = new ScriptMirror(value);
+  } else if (ObjectIsPromise(value)) {
+    mirror = new PromiseMirror(value);
   } else {
     mirror = new ObjectMirror(value, OBJECT_TYPE, opt_transient);
   }
 
   mirror_cache_[mirror.handle()] = mirror;
   return mirror;
 }
 
 
 /**
@@ skipping 49 matching lines @@
 var OBJECT_TYPE = 'object';
 var FUNCTION_TYPE = 'function';
 var REGEXP_TYPE = 'regexp';
 var ERROR_TYPE = 'error';
 var PROPERTY_TYPE = 'property';
 var INTERNAL_PROPERTY_TYPE = 'internalProperty';
 var FRAME_TYPE = 'frame';
 var SCRIPT_TYPE = 'script';
 var CONTEXT_TYPE = 'context';
 var SCOPE_TYPE = 'scope';
+var PROMISE_TYPE = 'promise';
 
 // Maximum length when sending strings through the JSON protocol.
 var kMaxProtocolStringLength = 80;
 
 // Different kind of properties.
 var PropertyKind = {};
 PropertyKind.Named   = 1;
 PropertyKind.Indexed = 2;
 
 
@@ skipping 33 matching lines @@
 //       - NullMirror
 //       - NumberMirror
 //       - StringMirror
 //       - ObjectMirror
 //         - FunctionMirror
 //           - UnresolvedFunctionMirror
 //         - ArrayMirror
 //         - DateMirror
 //         - RegExpMirror
 //         - ErrorMirror
+//         - PromiseMirror
 //     - PropertyMirror
 //     - InternalPropertyMirror
 //     - FrameMirror
 //     - ScriptMirror
 
 
 /**
  * Base class for all mirror objects.
  * @param {string} type The type of the mirror
  * @constructor
@@ skipping 119 matching lines @@
 /**
  * Check whether the mirror reflects an error.
  * @returns {boolean} True if the mirror reflects an error
  */
 Mirror.prototype.isError = function() {
   return this instanceof ErrorMirror;
 };
 
 
 /**
+ * Check whether the mirror reflects a promise.
+ * @returns {boolean} True if the mirror reflects a promise
+ */
+Mirror.prototype.isPromise = function() {
+  return this instanceof PromiseMirror;
+};
+
+
+/**
  * Check whether the mirror reflects a property.
  * @returns {boolean} True if the mirror reflects a property
  */
 Mirror.prototype.isProperty = function() {
   return this instanceof PropertyMirror;
 };
 
 
 /**
  * Check whether the mirror reflects an internal property.
@@ skipping 266 matching lines @@
 ObjectMirror.prototype.propertyNames = function(kind, limit) {
   // Find kind and limit and allocate array for the result
   kind = kind || PropertyKind.Named | PropertyKind.Indexed;
 
   var propertyNames;
   var elementNames;
   var total = 0;
 
   // Find all the named properties.
   if (kind & PropertyKind.Named) {
-    // Get all the local property names.
+    // Get all the local property names except for private symbols.
     propertyNames =
-        %GetLocalPropertyNames(this.value_, PROPERTY_ATTRIBUTES_NONE);
+        %GetLocalPropertyNames(this.value_, PROPERTY_ATTRIBUTES_PRIVATE_SYMBOL);
     total += propertyNames.length;
 
     // Get names for named interceptor properties if any.
     if (this.hasNamedInterceptor() && (kind & PropertyKind.Named)) {
       var namedInterceptorNames =
           %GetNamedInterceptorPropertyNames(this.value_);
       if (namedInterceptorNames) {
         propertyNames = propertyNames.concat(namedInterceptorNames);
         total += namedInterceptorNames.length;
       }
@@ skipping 512 matching lines @@
   try {
     str = %_CallFunction(this.value_, builtins.ErrorToString);
   } catch (e) {
     str = '#<Error>';
   }
   return str;
 };
 
 
 /**
+ * Mirror object for a Promise object.
+ * @param {Object} data The Promise object
+ * @constructor
+ * @extends Mirror
+ */
+function PromiseMirror(value) {
+  %_CallFunction(this, value, PROMISE_TYPE, ObjectMirror);
+}
+inherits(PromiseMirror, ObjectMirror);
+
+
+PromiseMirror.prototype.status = function() {
+  var status = %GetPromiseStatus(this.value_);
+  if (status == 0) return "pending";
+  if (status == 1) return "resolved";
+  return "rejected";
+};
+
+
+/**
  * Base mirror object for properties.
  * @param {ObjectMirror} mirror The mirror object having this property
  * @param {string} name The name of the property
  * @param {Array} details Details about the property
  * @constructor
  * @extends Mirror
  */
 function PropertyMirror(mirror, name, details) {
   %_CallFunction(this, PROPERTY_TYPE, Mirror);
   this.mirror_ = mirror;
@@ skipping 1158 matching lines @@
       } else {
         content.value = mirror.value();
       }
       content.length = mirror.length();
       break;
 
     case OBJECT_TYPE:
     case FUNCTION_TYPE:
     case ERROR_TYPE:
     case REGEXP_TYPE:
+    case PROMISE_TYPE:
       // Add object representation.
       this.serializeObject_(mirror, content, details);
       break;
 
     case PROPERTY_TYPE:
     case INTERNAL_PROPERTY_TYPE:
       throw new Error('PropertyMirror cannot be serialized independently');
       break;
 
     case FRAME_TYPE:
@@ skipping 82 matching lines @@
   content.prototypeObject = this.serializeReference(mirror.prototypeObject());
 
   // Add flags to indicate whether there are interceptors.
   if (mirror.hasNamedInterceptor()) {
     content.namedInterceptor = true;
   }
   if (mirror.hasIndexedInterceptor()) {
     content.indexedInterceptor = true;
   }
 
-  // Add function specific properties.
   if (mirror.isFunction()) {
     // Add function specific properties.
     content.name = mirror.name();
     if (!IS_UNDEFINED(mirror.inferredName())) {
       content.inferredName = mirror.inferredName();
     }
     content.resolved = mirror.resolved();
     if (mirror.resolved()) {
       content.source = mirror.source();
     }
     if (mirror.script()) {
       content.script = this.serializeReference(mirror.script());
       content.scriptId = mirror.script().id();
 
       serializeLocationFields(mirror.sourceLocation(), content);
     }
 
     content.scopes = [];
     for (var i = 0; i < mirror.scopeCount(); i++) {
       var scope = mirror.scope(i);
       content.scopes.push({
         type: scope.scopeType(),
         index: i
       });
     }
   }
 
-  // Add date specific properties.
   if (mirror.isDate()) {
     // Add date specific properties.
     content.value = mirror.value();
   }
 
+  if (mirror.isPromise()) {
+    // Add promise specific properties.
+    content.status = mirror.status();
+  }
+
   // Add actual properties - named properties followed by indexed properties.
   var propertyNames = mirror.propertyNames(PropertyKind.Named);
   var propertyIndexes = mirror.propertyNames(PropertyKind.Indexed);
   var p = new Array(propertyNames.length + propertyIndexes.length);
   for (var i = 0; i < propertyNames.length; i++) {
     var propertyMirror = mirror.property(propertyNames[i]);
     p[i] = this.serializeProperty_(propertyMirror);
     if (details) {
       this.add_(propertyMirror.value());
     }
@@ skipping 185 matching lines @@
   }
   if (!NUMBER_IS_FINITE(value)) {
     if (value > 0) {
       return 'Infinity';
     } else {
       return '-Infinity';
     }
   }
   return value;
 }