Make Object.freeze/seal/preventExtensions observable

src/v8natives.js

 // Copyright 2012 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 1231 matching lines @@
   return obj;
 }
 
 
 // ES5 section 15.2.3.9.
 function ObjectFreeze(obj) {
   if (!IS_SPEC_OBJECT(obj)) {
     throw MakeTypeError("called_on_non_object", ["Object.freeze"]);
   }
   var isProxy = %IsJSProxy(obj);
-  if (isProxy || %HasNonStrictArgumentsElements(obj)) {
+  if (isProxy || %HasNonStrictArgumentsElements(obj) || %IsObserved(obj)) {
     if (isProxy) {
       ProxyFix(obj);
     }
     var names = ObjectGetOwnPropertyNames(obj);
     for (var i = 0; i < names.length; i++) {
       var name = names[i];
       var desc = GetOwnProperty(obj, name);
       if (desc.isWritable() || desc.isConfigurable()) {
         if (IsDataDescriptor(desc)) desc.setWritable(false);
         desc.setConfigurable(false);
@@ skipping 567 matching lines @@
   %SetCode($Function, FunctionConstructor);
   %SetProperty($Function.prototype, "constructor", $Function, DONT_ENUM);
 
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "bind", FunctionBind,
     "toString", FunctionToString
   ));
 }
 
 SetUpFunction();