Add "own" symbols support.

src/objects.cc

 // Copyright 2013 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.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 3541 matching lines @@
   DisallowHeapAllocation no_gc;
   LookupOwnRealNamedProperty(name, result);
   if (result->IsFound()) return;
 
   LookupRealNamedPropertyInPrototypes(name, result);
 }
 
 
 void JSObject::LookupRealNamedPropertyInPrototypes(Handle<Name> name,
                                                    LookupResult* result) {
+  if (name->IsOwn()) {
+    result->NotFound();
+    return;
+  }
+
   DisallowHeapAllocation no_gc;
   Isolate* isolate = GetIsolate();
   for (PrototypeIterator iter(isolate, this); !iter.IsAtEnd(); iter.Advance()) {
     if (iter.GetCurrent()->IsJSProxy()) {
       return result->HandlerResult(JSProxy::cast(iter.GetCurrent()));
     }
     JSObject::cast(iter.GetCurrent())->LookupOwnRealNamedProperty(name, result);
     DCHECK(!(result->IsFound() && result->type() == INTERCEPTOR));
     if (result->IsFound()) return;
   }
@@ skipping 2527 matching lines @@
   JSObject* js_object = JSObject::cast(this);
 
   // Check for lookup interceptor except when bootstrapping.
   if (js_object->HasNamedInterceptor() &&
       !GetIsolate()->bootstrapper()->IsActive()) {
     result->InterceptorResult(js_object);
     return;
   }
 
   js_object->LookupOwnRealNamedProperty(name, result);
-  if (result->IsFound() || !search_hidden_prototypes) return;
+  if (result->IsFound() || name->IsOwn() || !search_hidden_prototypes) return;
 
   PrototypeIterator iter(GetIsolate(), js_object);
   if (!iter.GetCurrent()->IsJSReceiver()) return;
   JSReceiver* receiver = JSReceiver::cast(iter.GetCurrent());
   if (receiver->map()->is_hidden_prototype()) {
     receiver->LookupOwn(name, result, search_hidden_prototypes);
   }
 }
 
 
 void JSReceiver::Lookup(Handle<Name> name, LookupResult* result) {
   DisallowHeapAllocation no_gc;
   // Ecma-262 3rd 8.6.2.4
   for (PrototypeIterator iter(GetIsolate(), this,
                               PrototypeIterator::START_AT_RECEIVER);
        !iter.IsAtEnd(); iter.Advance()) {
     JSReceiver::cast(iter.GetCurrent())->LookupOwn(name, result, false);
     if (result->IsFound()) return;
+    if (name->IsOwn()) {
+      result->NotFound();
+      return;
+    }
   }
   result->NotFound();
 }
 
 
 static bool ContainsOnlyValidKeys(Handle<FixedArray> array) {
   int len = array->length();
   for (int i = 0; i < len; i++) {
     Object* e = array->get(i);
     if (!(e->IsString() || e->IsNumber())) return false;
@@ skipping 10779 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal