--- a/hotspot/src/share/vm/runtime/vmStructs.cpp	Tue Oct 21 11:57:22 2014 +0200
+++ b/hotspot/src/share/vm/runtime/vmStructs.cpp	Wed Oct 22 16:40:43 2014 +0200
@@ -547,6 +547,7 @@
                                                                                                                                      \
     static_field(GenCollectedHeap,             _gch,                                          GenCollectedHeap*)                     \
  nonstatic_field(GenCollectedHeap,             _n_gens,                                       int)                                   \
+ unchecked_nonstatic_field(GenCollectedHeap,   _gens,                                         sizeof(GenCollectedHeap::_gens)) /* NOTE: no type */ \
   nonstatic_field(GenCollectedHeap,            _gen_specs,                                    GenerationSpec**)                      \
                                                                                                                                      \
   nonstatic_field(HeapWord,                    i,                                             char*)                                 \