494   // If clear_space is true, clear the HeapRegion's memory.
 495   // Callers must ensure this is not called by multiple threads at the same time.
 496   void hr_clear(bool clear_space);
 497   // Clear the card table corresponding to this region.
 498   void clear_cardtable();
 499 
 500   // Returns the "evacuation_failed" property of the region.
 501   bool evacuation_failed() { return _evacuation_failed; }
 502 
 503   // Sets the "evacuation_failed" property of the region.
 504   void set_evacuation_failed(bool b) {
 505     _evacuation_failed = b;
 506 
 507     if (b) {
 508       _next_marked_bytes = 0;
 509     }
 510   }
 511 
 512   // Notify the region that we are about to start processing
 513   // self-forwarded objects during evac failure handling.
 514   void note_self_forwarding_removal_start(bool during_initial_mark,
 515                                           bool during_conc_mark);
 516 
 517   // Notify the region that we have finished processing self-forwarded
 518   // objects during evac failure handling.
 519   void note_self_forwarding_removal_end(size_t marked_bytes);
 520 
 521   uint index_in_opt_cset() const {
 522     assert(has_index_in_opt_cset(), "Opt cset index not set.");
 523     return _index_in_opt_cset;
 524   }
 525   bool has_index_in_opt_cset() const { return _index_in_opt_cset != InvalidCSetIndex; }
 526   void set_index_in_opt_cset(uint index) { _index_in_opt_cset = index; }
 527   void clear_index_in_opt_cset() { _index_in_opt_cset = InvalidCSetIndex; }
 528 
 529   void calc_gc_efficiency(void);
 530   double gc_efficiency() const { return _gc_efficiency;}
 531 
 532   uint  young_index_in_cset() const { return _young_index_in_cset; }
 533   void clear_young_index_in_cset() { _young_index_in_cset = 0; }
 534   void set_young_index_in_cset(uint index) {

 494   // If clear_space is true, clear the HeapRegion's memory.
 495   // Callers must ensure this is not called by multiple threads at the same time.
 496   void hr_clear(bool clear_space);
 497   // Clear the card table corresponding to this region.
 498   void clear_cardtable();
 499 
 500   // Returns the "evacuation_failed" property of the region.
 501   bool evacuation_failed() { return _evacuation_failed; }
 502 
 503   // Sets the "evacuation_failed" property of the region.
 504   void set_evacuation_failed(bool b) {
 505     _evacuation_failed = b;
 506 
 507     if (b) {
 508       _next_marked_bytes = 0;
 509     }
 510   }
 511 
 512   // Notify the region that we are about to start processing
 513   // self-forwarded objects during evac failure handling.
 514   void note_self_forwarding_removal_start(bool during_concurrent_start,
 515                                           bool during_conc_mark);
 516 
 517   // Notify the region that we have finished processing self-forwarded
 518   // objects during evac failure handling.
 519   void note_self_forwarding_removal_end(size_t marked_bytes);
 520 
 521   uint index_in_opt_cset() const {
 522     assert(has_index_in_opt_cset(), "Opt cset index not set.");
 523     return _index_in_opt_cset;
 524   }
 525   bool has_index_in_opt_cset() const { return _index_in_opt_cset != InvalidCSetIndex; }
 526   void set_index_in_opt_cset(uint index) { _index_in_opt_cset = index; }
 527   void clear_index_in_opt_cset() { _index_in_opt_cset = InvalidCSetIndex; }
 528 
 529   void calc_gc_efficiency(void);
 530   double gc_efficiency() const { return _gc_efficiency;}
 531 
 532   uint  young_index_in_cset() const { return _young_index_in_cset; }
 533   void clear_young_index_in_cset() { _young_index_in_cset = 0; }
 534   void set_young_index_in_cset(uint index) {