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

src/objects-inl.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 1659 matching lines @@
     set_bit_field(bit_field() & ~(1 << kHasNonInstancePrototype));
   }
 }
 
 
 bool Map::has_non_instance_prototype() {
   return ((1 << kHasNonInstancePrototype) & bit_field()) != 0;
 }
 
 
+void Map::set_is_access_check_needed(bool access_check_needed) {
+  if (access_check_needed) {
+    set_bit_field(bit_field() | (1 << kIsAccessCheckNeeded));
+  } else {
+    set_bit_field(bit_field() & ~(1 << kIsAccessCheckNeeded));
+  }
+}
+
+
+bool Map::is_access_check_needed() {
+  return ((1 << kIsAccessCheckNeeded) & bit_field()) != 0;
+}
+
+
 Code::Flags Code::flags() {
   return static_cast<Flags>(READ_INT_FIELD(this, kFlagsOffset));
 }
 
 
 void Code::set_flags(Code::Flags flags) {
   // Make sure that all call stubs have an arguments count.
   ASSERT(ExtractKindFromFlags(flags) != CALL_IC ||
          ExtractArgumentsCountFromFlags(flags) >= 0);
   WRITE_INT_FIELD(this, kFlagsOffset, flags);
@@ skipping 601 matching lines @@
 bool AccessorInfo::all_can_write() {
   return BooleanBit::get(flag(), kAllCanWriteBit);
 }
 
 
 void AccessorInfo::set_all_can_write(bool value) {
   set_flag(BooleanBit::set(flag(), kAllCanWriteBit, value));
 }
 
 
+bool AccessorInfo::prohibits_overwriting() {
+  return BooleanBit::get(flag(), kProhibitsOverwritingBit);
+}
+
+
+void AccessorInfo::set_prohibits_overwriting(bool value) {
+  set_flag(BooleanBit::set(flag(), kProhibitsOverwritingBit, value));
+}
+
+
 PropertyAttributes AccessorInfo::property_attributes() {
   return AttributesField::decode(static_cast<uint32_t>(flag()->value()));
 }
 
 
 void AccessorInfo::set_property_attributes(PropertyAttributes attributes) {
   ASSERT(AttributesField::is_valid(attributes));
   int rest_value = flag()->value() & ~AttributesField::mask();
   set_flag(Smi::FromInt(rest_value | AttributesField::encode(attributes)));
 }
@@ skipping 49 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_