Fixed global object leak

src/runtime.cc

 // 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 9628 matching lines @@
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GlobalReceiver) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 1);
   Object* global = args[0];
   if (!global->IsJSGlobalObject()) return isolate->heap()->null_value();
   return JSGlobalObject::cast(global)->global_receiver();
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_IsAttachedGlobal) {
+  SealHandleScope shs(isolate);
+  ASSERT(args.length() == 1);
+  Object* global = args[0];
+  if (!global->IsJSGlobalObject()) return isolate->heap()->false_value();
+  return isolate->heap()->ToBoolean(
+      !JSGlobalObject::cast(global)->IsDetached());
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_ParseJson) {
   HandleScope scope(isolate);
   ASSERT_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
 
   source = Handle<String>(FlattenGetString(source));
   // Optimized fast case where we only have ASCII characters.
   Handle<Object> result;
   if (source->IsSeqOneByteString()) {
     result = JsonParser<true>::Parse(source);
@@ skipping 5256 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal