Mark internal AccessorInfo properties as "special data properties"

src/objects.h

 // Copyright 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 10488 matching lines @@
   DECL_ACCESSORS(name, Object)
   DECL_ACCESSORS(flag, Smi)
   DECL_ACCESSORS(expected_receiver_type, Object)
 
   inline bool all_can_read();
   inline void set_all_can_read(bool value);
 
   inline bool all_can_write();
   inline void set_all_can_write(bool value);
 
+  inline bool is_special_data_property();
+  inline void mark_special_data_property();

[rossberg, 2015/05/12 14:09:26]

Nit: Our usual naming convention would be set_is_sepcial_data_property.

+
   inline PropertyAttributes property_attributes();
   inline void set_property_attributes(PropertyAttributes attributes);
 
   // Checks whether the given receiver is compatible with this accessor.
   static bool IsCompatibleReceiverMap(Isolate* isolate,
                                       Handle<AccessorInfo> info,
                                       Handle<Map> map);
   inline bool IsCompatibleReceiver(Object* receiver);
 
   DECLARE_CAST(AccessorInfo)
@@ skipping 12 matching lines @@
   static const int kExpectedReceiverTypeOffset = kFlagOffset + kPointerSize;
   static const int kSize = kExpectedReceiverTypeOffset + kPointerSize;
 
  private:
   inline bool HasExpectedReceiverType() {
     return expected_receiver_type()->IsFunctionTemplateInfo();
   }
   // Bit positions in flag.
   static const int kAllCanReadBit = 0;
   static const int kAllCanWriteBit = 1;
-  class AttributesField: public BitField<PropertyAttributes, 2, 3> {};
+  static const int kSpecialDataProperty = 2;
+  class AttributesField : public BitField<PropertyAttributes, 3, 3> {};
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(AccessorInfo);
 };
 
 
 // An accessor must have a getter, but can have no setter.
 //
 // When setting a property, V8 searches accessors in prototypes.
 // If an accessor was found and it does not have a setter,
 // the request is ignored.
@@ skipping 549 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_