wrap gc callbacks in handlescopes

src/global-handles.cc

 // Copyright 2009 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 244 matching lines @@
     Object** object = location();
     {
       // Check that we are not passing a finalized external string to
       // the callback.
       ASSERT(!object_->IsExternalAsciiString() ||
              ExternalAsciiString::cast(object_)->resource() != NULL);
       ASSERT(!object_->IsExternalTwoByteString() ||
              ExternalTwoByteString::cast(object_)->resource() != NULL);
       // Leaving V8.
       VMState<EXTERNAL> state(isolate);
+      HandleScope handle_scope(isolate);
       weak_reference_callback_(reinterpret_cast<v8::Isolate*>(isolate),
                                reinterpret_cast<Persistent<Value>*>(&object),
                                par);
     }
     // Absence of explicit cleanup or revival of weak handle
     // in most of the cases would lead to memory leak.
     ASSERT(state() != NEAR_DEATH);
     return true;
   }
 
@@ skipping 736 matching lines @@
     }
   }
   object_group_connections_.Clear();
   object_group_connections_.Initialize(kObjectGroupConnectionsCapacity);
   retainer_infos_.Clear();
   implicit_ref_connections_.Clear();
 }
 
 
 } }  // namespace v8::internal