Store fast property index in stubs generated for interceptor loads

src/objects.cc

 // Copyright 2006-2009 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 5599 matching lines @@
   LocalLookupRealNamedProperty(name, &result);
   if (result.IsValid()) return GetProperty(receiver, &result, name, attributes);
   // Continue searching via the prototype chain.
   Object* pt = GetPrototype();
   *attributes = ABSENT;
   if (pt == Heap::null_value()) return Heap::undefined_value();
   return pt->GetPropertyWithReceiver(receiver, name, attributes);
 }
 
 
-Object* JSObject::GetPropertyWithInterceptor(JSObject* receiver,
-                                             String* name,
-                                             PropertyAttributes* attributes) {
+Object* JSObject::GetPropertyWithInterceptorProper(
+    JSObject* receiver,
+    String* name,
+    PropertyAttributes* attributes) {
   HandleScope scope;
   Handle<InterceptorInfo> interceptor(GetNamedInterceptor());
   Handle<JSObject> receiver_handle(receiver);
   Handle<JSObject> holder_handle(this);
   Handle<String> name_handle(name);
   Handle<Object> data_handle(interceptor->data());
 
   if (!interceptor->getter()->IsUndefined()) {
     v8::NamedPropertyGetter getter =
         v8::ToCData<v8::NamedPropertyGetter>(interceptor->getter());
     LOG(ApiNamedPropertyAccess("interceptor-named-get", *holder_handle, name));
     v8::AccessorInfo info(v8::Utils::ToLocal(receiver_handle),
                           v8::Utils::ToLocal(data_handle),
                           v8::Utils::ToLocal(holder_handle));
     v8::Handle<v8::Value> result;
     {
       // Leaving JavaScript.
       VMState state(EXTERNAL);
       result = getter(v8::Utils::ToLocal(name_handle), info);
     }
     RETURN_IF_SCHEDULED_EXCEPTION();
     if (!result.IsEmpty()) {
       *attributes = NONE;
       return *v8::Utils::OpenHandle(*result);
     }
   }
 
-  Object* raw_result = holder_handle->GetPropertyPostInterceptor(
+  return NULL;
+}
+
+
+Object* JSObject::GetInterceptorPropertyWithLookupHint(
+    JSObject* receiver,
+    Smi* lookup_hint,
+    String* name,
+    PropertyAttributes* attributes) {
+  HandleScope scope;
+  Handle<JSObject> receiver_handle(receiver);
+  Handle<JSObject> holder_handle(this);
+  Handle<String> name_handle(name);
+
+  Object* result = GetPropertyWithInterceptorProper(receiver, name, attributes);
+  if (result) return result;
+
+  int property_index = lookup_hint->value();
+  if (property_index >= 0) {
+    result = holder_handle->FastPropertyAt(property_index);
+  } else {
+    switch (property_index) {
+      case kLookupInPrototype: {
+          Object* pt = holder_handle->GetPrototype();
+          *attributes = ABSENT;
+          if (pt == Heap::null_value()) return Heap::undefined_value();
+          result = pt->GetPropertyWithReceiver(
+              *receiver_handle,
+              *name_handle,
+              attributes);
+          RETURN_IF_SCHEDULED_EXCEPTION();
+        }
+        break;
+
+      case kLookupInHolder:
+        result = holder_handle->GetPropertyPostInterceptor(
+            *receiver_handle,
+            *name_handle,
+            attributes);
+        RETURN_IF_SCHEDULED_EXCEPTION();
+        break;
+
+      default:
+        UNREACHABLE();
+    }
+  }
+
+  return result;
+}
+
+
+Object* JSObject::GetPropertyWithInterceptor(
+    JSObject* receiver,
+    String* name,
+    PropertyAttributes* attributes) {
+  HandleScope scope;
+  Handle<JSObject> receiver_handle(receiver);
+  Handle<JSObject> holder_handle(this);
+  Handle<String> name_handle(name);
+
+  Object* result = GetPropertyWithInterceptorProper(receiver, name, attributes);
+  if (result) return result;
+
+  result = holder_handle->GetPropertyPostInterceptor(
       *receiver_handle,
       *name_handle,
       attributes);
   RETURN_IF_SCHEDULED_EXCEPTION();
-  return raw_result;
+  return result;
 }
 
 
 bool JSObject::HasRealNamedProperty(String* key) {
   // Check access rights if needed.
   if (IsAccessCheckNeeded() &&
       !Top::MayNamedAccess(this, key, v8::ACCESS_HAS)) {
     Top::ReportFailedAccessCheck(this, v8::ACCESS_HAS);
     return false;
   }
@@ skipping 1795 matching lines @@
   // No break point.
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 } }  // namespace v8::internal