Use page header information to test for InNewSpace.

src/top.cc

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// 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
 //       with the distribution.
@@ skipping 553 matching lines @@
 
 Failure* Isolate::ReThrow(MaybeObject* exception, MessageLocation* location) {
   bool can_be_caught_externally = false;
   ShouldReportException(&can_be_caught_externally,
                         is_catchable_by_javascript(exception));
   thread_local_top()->catcher_ = can_be_caught_externally ?
       try_catch_handler() : NULL;
 
   // Set the exception being re-thrown.
   set_pending_exception(exception);
+  if (exception->IsFailure()) return exception->ToFailureUnchecked();
   return Failure::Exception();
 }
 
 
 Failure* Isolate::ThrowIllegalOperation() {
   return Throw(heap_.illegal_access_symbol());
 }
 
 
 void Isolate::ScheduleThrow(Object* exception) {
@@ skipping 383 matching lines @@
   thread_local_top()->simulator_ = Simulator::current(this);
 #endif
 #endif
   if (RuntimeProfiler::IsEnabled() && current_vm_state() == JS) {
     RuntimeProfiler::IsolateEnteredJS(this);
   }
   return from + sizeof(ThreadLocalTop);
 }
 
 } }  // namespace v8::internal