Implement Object.keys for proxies.

src/v8natives.js

 // Copyright 2006-2008 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 290 matching lines @@
   if (receiver == null && !IS_UNDETECTABLE(receiver)) {
     receiver = %GlobalReceiver(global);
   }
   return %LookupAccessor(ToObject(receiver), ToString(name), SETTER);
 }
 
 
 function ObjectKeys(obj) {
   if (!IS_SPEC_OBJECT(obj))
     throw MakeTypeError("obj_ctor_property_non_object", ["keys"]);
+  if (%IsJSProxy(obj)) {
+    var handler = %GetHandler(obj);
+    var keys = handler.keys;
+    if (IS_UNDEFINED(keys)) keys = DerivedKeysTrap;
+    var names = %_CallFunction(handler, keys);
+    return ToStringArray(names);
+  }
   return %LocalKeys(obj);
 }
 
 
 // ES5 8.10.1.
 function IsAccessorDescriptor(desc) {
   if (IS_UNDEFINED(desc)) return false;
   return desc.hasGetter() || desc.hasSetter();
 }
 
@@ skipping 257 matching lines @@
 
 // ES5 section 8.12.2.
 function GetProperty(obj, p) {
   if (%IsJSProxy(obj)) {
     var handler = %GetHandler(obj);
     var getProperty = handler.getPropertyDescriptor;
     if (IS_UNDEFINED(getProperty)) {
       throw MakeTypeError("handler_trap_missing",
                           [handler, "getPropertyDescriptor"]);
     }
-    var descriptor = getProperty.call(handler, p);
+    var descriptor = %_CallFunction(handler, p, getProperty);
     if (IS_UNDEFINED(descriptor)) return descriptor;
     var desc = ToCompletePropertyDescriptor(descriptor);
     if (!desc.configurable) {
       throw MakeTypeError("proxy_prop_not_configurable",
                           [handler, "getPropertyDescriptor", p, descriptor]);
     }
     return desc;
   }
   var prop = GetOwnProperty(obj);
   if (!IS_UNDEFINED(prop)) return prop;
   var proto = %GetPrototype(obj);
   if (IS_NULL(proto)) return void 0;
   return GetProperty(proto, p);
 }
 
 
 // ES5 section 8.12.6
 function HasProperty(obj, p) {
   if (%IsJSProxy(obj)) {
     var handler = %GetHandler(obj);
     var has = handler.has;
     if (IS_UNDEFINED(has)) has = DerivedHasTrap;
-    return ToBoolean(has.call(handler, obj, p));
+    return ToBoolean(%_CallFunction(handler, obj, p, has));
   }
   var desc = GetProperty(obj, p);
   return IS_UNDEFINED(desc) ? false : true;
 }
 
 
 // ES5 section 8.12.1.
 function GetOwnProperty(obj, p) {
   // GetOwnProperty returns an array indexed by the constants
   // defined in macros.py.
   // If p is not a property on obj undefined is returned.
   var props = %GetOwnProperty(ToObject(obj), ToString(p));
 
   // A false value here means that access checks failed.
   if (props === false) return void 0;
 
   return ConvertDescriptorArrayToDescriptor(props);
 }
 
 
 // Harmony proxies.
 function DefineProxyProperty(obj, p, attributes, should_throw) {
   var handler = %GetHandler(obj);
   var defineProperty = handler.defineProperty;
   if (IS_UNDEFINED(defineProperty)) {
     throw MakeTypeError("handler_trap_missing", [handler, "defineProperty"]);
   }
-  var result = defineProperty.call(handler, p, attributes);
+  var result = %_CallFunction(handler, p, attributes, defineProperty);
   if (!ToBoolean(result)) {
     if (should_throw) {
       throw MakeTypeError("handler_failed", [handler, "defineProperty"]);
     } else {
       return false;
     }
   }
   return true;
 }
 
@@ skipping 211 matching lines @@
     throw MakeTypeError("obj_ctor_property_non_object", ["getOwnPropertyNames"]);
 
   // Special handling for proxies.
   if (%IsJSProxy(obj)) {
     var handler = %GetHandler(obj);
     var getOwnPropertyNames = handler.getOwnPropertyNames;
     if (IS_UNDEFINED(getOwnPropertyNames)) {
       throw MakeTypeError("handler_trap_missing",
                           [handler, "getOwnPropertyNames"]);
     }
-    var names = getOwnPropertyNames.call(handler);
+    var names = %_CallFunction(handler, getOwnPropertyNames);
     return ToStringArray(names, "getOwnPropertyNames");
   }
 
   // Find all the indexed properties.
 
   // Get the local element names.
   var propertyNames = %GetLocalElementNames(obj);
 
   // Get names for indexed interceptor properties.
   if (%GetInterceptorInfo(obj) & 1) {
@@ skipping 575 matching lines @@
 // ----------------------------------------------------------------------------
 
 function SetupFunction() {
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "bind", FunctionBind,
     "toString", FunctionToString
   ));
 }
 
 SetupFunction();