73   }
  74 };
  75 
  76 //
  77 // CollectedHeap
  78 //   GenCollectedHeap
  79 //   G1CollectedHeap
  80 //   ParallelScavengeHeap
  81 //
  82 class CollectedHeap : public CHeapObj<mtInternal> {
  83   friend class VMStructs;
  84   friend class IsGCActiveMark; // Block structured external access to _is_gc_active
  85 
  86  private:
  87 #ifdef ASSERT
  88   static int       _fire_out_of_memory_count;
  89 #endif
  90 
  91   GCHeapLog* _gc_heap_log;
  92 
  93   // Used in support of ReduceInitialCardMarks; only consulted if COMPILER2 is being used

  94   bool _defer_initial_card_mark;
  95 
  96   MemRegion _reserved;
  97 
  98  protected:
  99   BarrierSet* _barrier_set;
 100   bool _is_gc_active;
 101 
 102   // Used for filler objects (static, but initialized in ctor).
 103   static size_t _filler_array_max_size;
 104 
 105   unsigned int _total_collections;          // ... started
 106   unsigned int _total_full_collections;     // ... started
 107   NOT_PRODUCT(volatile size_t _promotion_failure_alot_count;)
 108   NOT_PRODUCT(volatile size_t _promotion_failure_alot_gc_number;)
 109 
 110   // Reason for current garbage collection.  Should be set to
 111   // a value reflecting no collection between collections.
 112   GCCause::Cause _gc_cause;
 113   GCCause::Cause _gc_lastcause;

  73   }
  74 };
  75 
  76 //
  77 // CollectedHeap
  78 //   GenCollectedHeap
  79 //   G1CollectedHeap
  80 //   ParallelScavengeHeap
  81 //
  82 class CollectedHeap : public CHeapObj<mtInternal> {
  83   friend class VMStructs;
  84   friend class IsGCActiveMark; // Block structured external access to _is_gc_active
  85 
  86  private:
  87 #ifdef ASSERT
  88   static int       _fire_out_of_memory_count;
  89 #endif
  90 
  91   GCHeapLog* _gc_heap_log;
  92 
  93   // Used in support of ReduceInitialCardMarks; only consulted if COMPILER2
  94   // or INCLUDE_JVMCI is being used
  95   bool _defer_initial_card_mark;
  96 
  97   MemRegion _reserved;
  98 
  99  protected:
 100   BarrierSet* _barrier_set;
 101   bool _is_gc_active;
 102 
 103   // Used for filler objects (static, but initialized in ctor).
 104   static size_t _filler_array_max_size;
 105 
 106   unsigned int _total_collections;          // ... started
 107   unsigned int _total_full_collections;     // ... started
 108   NOT_PRODUCT(volatile size_t _promotion_failure_alot_count;)
 109   NOT_PRODUCT(volatile size_t _promotion_failure_alot_gc_number;)
 110 
 111   // Reason for current garbage collection.  Should be set to
 112   // a value reflecting no collection between collections.
 113   GCCause::Cause _gc_cause;
 114   GCCause::Cause _gc_lastcause;