Add support for API accessors that prohibit overwriting by accessors...

src/objects.h

 // 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 1262 matching lines @@
   // Lookup a property.  If found, the result is valid and has
   // detailed information.
   void LocalLookup(String* name, LookupResult* result);
   void Lookup(String* name, LookupResult* result);
 
   // The following lookup functions skip interceptors.
   void LocalLookupRealNamedProperty(String* name, LookupResult* result);
   void LookupRealNamedProperty(String* name, LookupResult* result);
   void LookupRealNamedPropertyInPrototypes(String* name, LookupResult* result);
   void LookupCallbackSetterInPrototypes(String* name, LookupResult* result);
+  void LookupCallback(String* name, LookupResult* result);
 
   // Returns the number of properties on this object filtering out properties
   // with the specified attributes (ignoring interceptors).
   int NumberOfLocalProperties(PropertyAttributes filter);
   // Returns the number of enumerable properties (ignoring interceptors).
   int NumberOfEnumProperties();
   // Fill in details for properties into storage.
   void GetLocalPropertyNames(FixedArray* storage);
 
   // Returns the number of properties on this object filtering out properties
@@ skipping 1064 matching lines @@
   inline void set_has_instance_call_handler() {
     set_bit_field(bit_field() | (1 << kHasInstanceCallHandler));
   }
 
   inline bool has_instance_call_handler() {
     return ((1 << kHasInstanceCallHandler) & bit_field()) != 0;
   }
 
   // Tells whether the instance needs security checks when accessing its
   // properties.
-  inline void set_is_access_check_needed() {
-    set_bit_field(bit_field() | (1 << kIsAccessCheckNeeded));
-  }
-
-  inline bool is_access_check_needed() {
-    return ((1 << kIsAccessCheckNeeded) & bit_field()) != 0;
-  }
+  inline void set_is_access_check_needed(bool access_check_needed);
+  inline bool is_access_check_needed();
 
   // [prototype]: implicit prototype object.
   DECL_ACCESSORS(prototype, Object)
 
   // [constructor]: points back to the function responsible for this map.
   DECL_ACCESSORS(constructor, Object)
 
   // [instance descriptors]: describes the object.
   DECL_ACCESSORS(instance_descriptors, DescriptorArray)
 
@@ skipping 1326 matching lines @@
   DECL_ACCESSORS(data, Object)
   DECL_ACCESSORS(name, Object)
   DECL_ACCESSORS(flag, Smi)
 
   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 prohibits_overwriting();
+  inline void set_prohibits_overwriting(bool value);
+
   inline PropertyAttributes property_attributes();
   inline void set_property_attributes(PropertyAttributes attributes);
 
   static inline AccessorInfo* cast(Object* obj);
 
 #ifdef DEBUG
   void AccessorInfoPrint();
   void AccessorInfoVerify();
 #endif
 
   static const int kGetterOffset = HeapObject::kHeaderSize;
   static const int kSetterOffset = kGetterOffset + kPointerSize;
   static const int kDataOffset = kSetterOffset + kPointerSize;
   static const int kNameOffset = kDataOffset + kPointerSize;
   static const int kFlagOffset = kNameOffset + kPointerSize;
   static const int kSize = kFlagOffset + kPointerSize;
 
  private:
   // Bit positions in flag.
-  static const int kAllCanReadBit  = 0;
+  static const int kAllCanReadBit = 0;
   static const int kAllCanWriteBit = 1;
-  class AttributesField: public BitField<PropertyAttributes, 2, 3> {};
+  static const int kProhibitsOverwritingBit = 2;
+  class AttributesField: public BitField<PropertyAttributes, 3, 3> {};
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(AccessorInfo);
 };
 
 
 class AccessCheckInfo: public Struct {
  public:
   DECL_ACCESSORS(named_callback, Object)
   DECL_ACCESSORS(indexed_callback, Object)
   DECL_ACCESSORS(data, Object)
@@ skipping 381 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_