--- a/hotspot/src/share/vm/gc_interface/collectedHeap.cpp	Fri Sep 19 09:23:55 2014 +0200
+++ b/hotspot/src/share/vm/gc_interface/collectedHeap.cpp	Thu Sep 18 12:45:45 2014 +0200
@@ -582,6 +582,14 @@
   }
 }
 
+void CollectedHeap::initialize_reserved_region(HeapWord *start, HeapWord *end) {
+  // It is important to do this in a way such that concurrent readers can't
+  // temporarily think something is in the heap.  (Seen this happen in asserts.)
+  _reserved.set_word_size(0);
+  _reserved.set_start(start);
+  _reserved.set_end(end);
+}
+
 /////////////// Unit tests ///////////////
 
 #ifndef PRODUCT