37 // collection.  It has two generations, young and old.
  38 class GenCollectedHeap : public CollectedHeap {
  39   friend class GenCollectorPolicy;
  40   friend class Generation;
  41   friend class DefNewGeneration;
  42   friend class TenuredGeneration;
  43   friend class ConcurrentMarkSweepGeneration;
  44   friend class CMSCollector;
  45   friend class GenMarkSweep;
  46   friend class VM_GenCollectForAllocation;
  47   friend class VM_GenCollectFull;
  48   friend class VM_GenCollectFullConcurrent;
  49   friend class VM_GC_HeapInspection;
  50   friend class VM_HeapDumper;
  51   friend class HeapInspection;
  52   friend class GCCauseSetter;
  53   friend class VMStructs;
  54 public:
  55   friend class VM_PopulateDumpSharedSpace;
  56 
  57  protected:
  58   // Fields:
  59   static GenCollectedHeap* _gch;
  60 
  61  private:
  62   Generation* _young_gen;
  63   Generation* _old_gen;
  64 
  65   // The singleton Gen Remembered Set.
  66   GenRemSet* _rem_set;
  67 
  68   // The generational collector policy.
  69   GenCollectorPolicy* _gen_policy;
  70 
  71   // Indicates that the most recent previous incremental collection failed.
  72   // The flag is cleared when an action is taken that might clear the
  73   // condition that caused that incremental collection to fail.
  74   bool _incremental_collection_failed;
  75 
  76   // In support of ExplicitGCInvokesConcurrent functionality
  77   unsigned int _full_collections_completed;
  78 
  79   // Data structure for claiming the (potentially) parallel tasks in
  80   // (gen-specific) roots processing.
  81   SubTasksDone* _process_strong_tasks;

  37 // collection.  It has two generations, young and old.
  38 class GenCollectedHeap : public CollectedHeap {
  39   friend class GenCollectorPolicy;
  40   friend class Generation;
  41   friend class DefNewGeneration;
  42   friend class TenuredGeneration;
  43   friend class ConcurrentMarkSweepGeneration;
  44   friend class CMSCollector;
  45   friend class GenMarkSweep;
  46   friend class VM_GenCollectForAllocation;
  47   friend class VM_GenCollectFull;
  48   friend class VM_GenCollectFullConcurrent;
  49   friend class VM_GC_HeapInspection;
  50   friend class VM_HeapDumper;
  51   friend class HeapInspection;
  52   friend class GCCauseSetter;
  53   friend class VMStructs;
  54 public:
  55   friend class VM_PopulateDumpSharedSpace;
  56 
  57 private:




  58   Generation* _young_gen;
  59   Generation* _old_gen;
  60 
  61   // The singleton Gen Remembered Set.
  62   GenRemSet* _rem_set;
  63 
  64   // The generational collector policy.
  65   GenCollectorPolicy* _gen_policy;
  66 
  67   // Indicates that the most recent previous incremental collection failed.
  68   // The flag is cleared when an action is taken that might clear the
  69   // condition that caused that incremental collection to fail.
  70   bool _incremental_collection_failed;
  71 
  72   // In support of ExplicitGCInvokesConcurrent functionality
  73   unsigned int _full_collections_completed;
  74 
  75   // Data structure for claiming the (potentially) parallel tasks in
  76   // (gen-specific) roots processing.
  77   SubTasksDone* _process_strong_tasks;