Add v8::Object::GetRealNamedPropertyAttributes()

src/api.cc

 // 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 3739 matching lines @@
   EXCEPTION_PREAMBLE(it->isolate());
   i::Handle<i::Object> result;
   has_pending_exception = !i::Object::GetProperty(it).ToHandle(&result);
   EXCEPTION_BAILOUT_CHECK(it->isolate(), Local<Value>());
 
   if (it->IsFound()) return Utils::ToLocal(result);
   return Local<Value>();
 }
 
 
+static Maybe<PropertyAttribute> GetPropertyAttributesByLookup(
+    i::LookupIterator* it) {
+  Maybe<PropertyAttributes> attr = i::JSReceiver::GetPropertyAttributes(it);
+  if (!it->IsFound()) return Maybe<PropertyAttribute>();
+  return Maybe<PropertyAttribute>(static_cast<PropertyAttribute>(attr.value));
+}
+
+
 Local<Value> v8::Object::GetRealNamedPropertyInPrototypeChain(
     Handle<String> key) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate,
              "v8::Object::GetRealNamedPropertyInPrototypeChain()",
              return Local<Value>());
   ENTER_V8(isolate);
   i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
   i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
   i::PrototypeIterator iter(isolate, self_obj);
   if (iter.IsAtEnd()) return Local<Value>();
   i::Handle<i::Object> proto = i::PrototypeIterator::GetCurrent(iter);
   i::LookupIterator it(self_obj, key_obj, i::Handle<i::JSReceiver>::cast(proto),
                        i::LookupIterator::PROTOTYPE_CHAIN_SKIP_INTERCEPTOR);
   return GetPropertyByLookup(&it);
 }
 
 
+Maybe<PropertyAttribute>
+v8::Object::GetRealNamedPropertyAttributesInPrototypeChain(Handle<String> key) {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  ON_BAILOUT(isolate,
+             "v8::Object::GetRealNamedPropertyAttributesInPrototypeChain()",
+             return Maybe<PropertyAttribute>());
+  ENTER_V8(isolate);
+  i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
+  i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
+  i::PrototypeIterator iter(isolate, self_obj);
+  if (iter.IsAtEnd()) return Maybe<PropertyAttribute>();
+  i::Handle<i::Object> proto = i::PrototypeIterator::GetCurrent(iter);
+  i::LookupIterator it(self_obj, key_obj, i::Handle<i::JSReceiver>::cast(proto),
+                       i::LookupIterator::PROTOTYPE_CHAIN_SKIP_INTERCEPTOR);
+  return GetPropertyAttributesByLookup(&it);
+}
+
+
 Local<Value> v8::Object::GetRealNamedProperty(Handle<String> key) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::GetRealNamedProperty()",
              return Local<Value>());
   ENTER_V8(isolate);
   i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
   i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
   i::LookupIterator it(self_obj, key_obj,
                        i::LookupIterator::PROTOTYPE_CHAIN_SKIP_INTERCEPTOR);
   return GetPropertyByLookup(&it);
 }
 
 
+Maybe<PropertyAttribute> v8::Object::GetRealNamedPropertyAttributes(
+    Handle<String> key) {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  ON_BAILOUT(isolate, "v8::Object::GetRealNamedPropertyAttributes()",
+             return Maybe<PropertyAttribute>());
+  ENTER_V8(isolate);
+  i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
+  i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
+  i::LookupIterator it(self_obj, key_obj,
+                       i::LookupIterator::PROTOTYPE_CHAIN_SKIP_INTERCEPTOR);
+  return GetPropertyAttributesByLookup(&it);
+}
+
+
 // Turns on access checks by copying the map and setting the check flag.
 // Because the object gets a new map, existing inline cache caching
 // the old map of this object will fail.
 void v8::Object::TurnOnAccessCheck() {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::TurnOnAccessCheck()", return);
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
 
@@ skipping 3982 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal