--- a/src/hotspot/share/gc/shared/genCollectedHeap.hpp	Thu Nov 30 08:35:33 2017 -0800
+++ b/src/hotspot/share/gc/shared/genCollectedHeap.hpp	Thu Nov 30 13:40:07 2017 +0100
@@ -112,6 +112,9 @@
   // (gen-specific) roots processing.
   SubTasksDone* _process_strong_tasks;
 
+  GCMemoryManager* _young_manager;
+  GCMemoryManager* _old_manager;
+
   // Helper functions for allocation
   HeapWord* attempt_allocation(size_t size,
                                bool   is_tlab,