Make 'Become' safe for retries.

src/factory.cc

 // Copyright 2011 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 930 matching lines @@
 
 
 void Factory::BecomeJSFunction(Handle<JSReceiver> object) {
   CALL_HEAP_FUNCTION_VOID(
       isolate(),
       isolate()->heap()->ReinitializeJSReceiver(
           *object, JS_FUNCTION_TYPE, JSFunction::kSize));
 }
 
 
+void Factory::SetIdentityHash(Handle<JSObject> object, Object* hash) {
+  CALL_HEAP_FUNCTION_VOID(
+      isolate(),
+      object->SetIdentityHash(hash, ALLOW_CREATION));
+}
+
+
 Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(
     Handle<String> name,
     int number_of_literals,
     Handle<Code> code,
     Handle<SerializedScopeInfo> scope_info) {
   Handle<SharedFunctionInfo> shared = NewSharedFunctionInfo(name);
   shared->set_code(*code);
   shared->set_scope_info(*scope_info);
   int literals_array_size = number_of_literals;
   // If the function contains object, regexp or array literals,
@@ skipping 357 matching lines @@
 Handle<Object> Factory::GlobalConstantFor(Handle<String> name) {
   Heap* h = isolate()->heap();
   if (name->Equals(h->undefined_symbol())) return undefined_value();
   if (name->Equals(h->nan_symbol())) return nan_value();
   if (name->Equals(h->infinity_symbol())) return infinity_value();
   return Handle<Object>::null();
 }
 
 
 } }  // namespace v8::internal