594     assert( surv_rate_group != NULL, "pre-condition" );
 595     assert( _surv_rate_group == NULL, "pre-condition" );
 596     assert( is_young(), "pre-condition" );
 597 
 598     _surv_rate_group = surv_rate_group;
 599     _age_index = surv_rate_group->next_age_index();
 600   }
 601 
 602   void uninstall_surv_rate_group() {
 603     if (_surv_rate_group != NULL) {
 604       assert( _age_index > -1, "pre-condition" );
 605       assert( is_young(), "pre-condition" );
 606 
 607       _surv_rate_group = NULL;
 608       _age_index = -1;
 609     } else {
 610       assert( _age_index == -1, "pre-condition" );
 611     }
 612   }
 613 










 614   void set_free();
 615 
 616   void set_eden();
 617   void set_eden_pre_gc();
 618   void set_survivor();
 619 
 620   void move_to_old();
 621   void set_old();
 622 
 623   void set_open_archive();
 624   void set_closed_archive();
 625 
 626   // Determine if an object has been allocated since the last
 627   // mark performed by the collector. This returns true iff the object
 628   // is within the unmarked area of the region.
 629   bool obj_allocated_since_prev_marking(oop obj) const {
 630     return (HeapWord *) obj >= prev_top_at_mark_start();
 631   }
 632   bool obj_allocated_since_next_marking(oop obj) const {
 633     return (HeapWord *) obj >= next_top_at_mark_start();

 594     assert( surv_rate_group != NULL, "pre-condition" );
 595     assert( _surv_rate_group == NULL, "pre-condition" );
 596     assert( is_young(), "pre-condition" );
 597 
 598     _surv_rate_group = surv_rate_group;
 599     _age_index = surv_rate_group->next_age_index();
 600   }
 601 
 602   void uninstall_surv_rate_group() {
 603     if (_surv_rate_group != NULL) {
 604       assert( _age_index > -1, "pre-condition" );
 605       assert( is_young(), "pre-condition" );
 606 
 607       _surv_rate_group = NULL;
 608       _age_index = -1;
 609     } else {
 610       assert( _age_index == -1, "pre-condition" );
 611     }
 612   }
 613 
 614   // Used to install surv rate group for a retained heap region.
 615   void install_surv_rate_group_for_retained(SurvRateGroup* surv_rate_group) {
 616     assert( surv_rate_group != NULL, "pre-condition" );
 617     assert( _surv_rate_group == NULL, "pre-condition" );
 618     assert( is_young(), "pre-condition" );
 619 
 620     _surv_rate_group = surv_rate_group;
 621     _age_index = surv_rate_group->next_age_index_for_retained();
 622   }
 623 
 624   void set_free();
 625 
 626   void set_eden();
 627   void set_eden_pre_gc();
 628   void set_survivor();
 629 
 630   void move_to_old();
 631   void set_old();
 632 
 633   void set_open_archive();
 634   void set_closed_archive();
 635 
 636   // Determine if an object has been allocated since the last
 637   // mark performed by the collector. This returns true iff the object
 638   // is within the unmarked area of the region.
 639   bool obj_allocated_since_prev_marking(oop obj) const {
 640     return (HeapWord *) obj >= prev_top_at_mark_start();
 641   }
 642   bool obj_allocated_since_next_marking(oop obj) const {
 643     return (HeapWord *) obj >= next_top_at_mark_start();