120 
 121   // Reason for current garbage collection.  Should be set to
 122   // a value reflecting no collection between collections.
 123   GCCause::Cause _gc_cause;
 124   GCCause::Cause _gc_lastcause;
 125   PerfStringVariable* _perf_gc_cause;
 126   PerfStringVariable* _perf_gc_lastcause;
 127 
 128   // Constructor
 129   CollectedHeap();
 130 
 131   // Create a new tlab. All TLAB allocations must go through this.
 132   // To allow more flexible TLAB allocations min_size specifies
 133   // the minimum size needed, while requested_size is the requested
 134   // size based on ergonomics. The actually allocated size will be
 135   // returned in actual_size.
 136   virtual HeapWord* allocate_new_tlab(size_t min_size,
 137                                       size_t requested_size,
 138                                       size_t* actual_size);
 139 
 140   // Accumulate statistics on all tlabs.
 141   virtual void accumulate_statistics_all_tlabs();
 142 
 143   // Reinitialize tlabs before resuming mutators.
 144   virtual void resize_all_tlabs();
 145 
 146   // Raw memory allocation facilities
 147   // The obj and array allocate methods are covers for these methods.
 148   // mem_allocate() should never be
 149   // called to allocate TLABs, only individual objects.
 150   virtual HeapWord* mem_allocate(size_t size,
 151                                  bool* gc_overhead_limit_was_exceeded) = 0;
 152 
 153   // Filler object utilities.
 154   static inline size_t filler_array_hdr_size();
 155   static inline size_t filler_array_min_size();
 156 
 157   DEBUG_ONLY(static void fill_args_check(HeapWord* start, size_t words);)
 158   DEBUG_ONLY(static void zap_filler_array(HeapWord* start, size_t words, bool zap = true);)
 159 
 160   // Fill with a single array; caller must ensure filler_array_min_size() <=
 161   // words <= filler_array_max_size().
 162   static inline void fill_with_array(HeapWord* start, size_t words, bool zap = true);

 120 
 121   // Reason for current garbage collection.  Should be set to
 122   // a value reflecting no collection between collections.
 123   GCCause::Cause _gc_cause;
 124   GCCause::Cause _gc_lastcause;
 125   PerfStringVariable* _perf_gc_cause;
 126   PerfStringVariable* _perf_gc_lastcause;
 127 
 128   // Constructor
 129   CollectedHeap();
 130 
 131   // Create a new tlab. All TLAB allocations must go through this.
 132   // To allow more flexible TLAB allocations min_size specifies
 133   // the minimum size needed, while requested_size is the requested
 134   // size based on ergonomics. The actually allocated size will be
 135   // returned in actual_size.
 136   virtual HeapWord* allocate_new_tlab(size_t min_size,
 137                                       size_t requested_size,
 138                                       size_t* actual_size);
 139 



 140   // Reinitialize tlabs before resuming mutators.
 141   virtual void resize_all_tlabs();
 142 
 143   // Raw memory allocation facilities
 144   // The obj and array allocate methods are covers for these methods.
 145   // mem_allocate() should never be
 146   // called to allocate TLABs, only individual objects.
 147   virtual HeapWord* mem_allocate(size_t size,
 148                                  bool* gc_overhead_limit_was_exceeded) = 0;
 149 
 150   // Filler object utilities.
 151   static inline size_t filler_array_hdr_size();
 152   static inline size_t filler_array_min_size();
 153 
 154   DEBUG_ONLY(static void fill_args_check(HeapWord* start, size_t words);)
 155   DEBUG_ONLY(static void zap_filler_array(HeapWord* start, size_t words, bool zap = true);)
 156 
 157   // Fill with a single array; caller must ensure filler_array_min_size() <=
 158   // words <= filler_array_max_size().
 159   static inline void fill_with_array(HeapWord* start, size_t words, bool zap = true);