71   //   Before the collection
  72   //     Objects are in eden or from-space
  73   //     All roots into the young generation point into eden or from-space.
  74   //
  75   //   After a failed collection
  76   //     Objects may be in eden, from-space, or to-space
  77   //     An object A in eden or from-space may have a copy B
  78   //       in to-space.  If B exists, all roots that once pointed
  79   //       to A must now point to B.
  80   //     All objects in the young generation are unmarked.
  81   //     Eden, from-space, and to-space will all be collected by
  82   //       the full collection.
  83   void handle_promotion_failure(oop);
  84 
  85   // In the absence of promotion failure, we wouldn't look at "from-space"
  86   // objects after a young-gen collection.  When promotion fails, however,
  87   // the subsequent full collection will look at from-space objects:
  88   // therefore we must remove their forwarding pointers.
  89   void remove_forwarding_pointers();
  90 


  91   // Preserved marks
  92   PreservedMarksSet _preserved_marks_set;
  93 
  94   // Promotion failure handling
  95   ExtendedOopClosure *_promo_failure_scan_stack_closure;
  96   void set_promo_failure_scan_stack_closure(ExtendedOopClosure *scan_stack_closure) {
  97     _promo_failure_scan_stack_closure = scan_stack_closure;
  98   }
  99 
 100   Stack<oop, mtGC> _promo_failure_scan_stack;
 101   void drain_promo_failure_scan_stack(void);
 102   bool _promo_failure_drain_in_progress;
 103 
 104   // Performance Counters
 105   GenerationCounters*  _gen_counters;
 106   CSpaceCounters*      _eden_counters;
 107   CSpaceCounters*      _from_counters;
 108   CSpaceCounters*      _to_counters;
 109 
 110   // sizing information

  71   //   Before the collection
  72   //     Objects are in eden or from-space
  73   //     All roots into the young generation point into eden or from-space.
  74   //
  75   //   After a failed collection
  76   //     Objects may be in eden, from-space, or to-space
  77   //     An object A in eden or from-space may have a copy B
  78   //       in to-space.  If B exists, all roots that once pointed
  79   //       to A must now point to B.
  80   //     All objects in the young generation are unmarked.
  81   //     Eden, from-space, and to-space will all be collected by
  82   //       the full collection.
  83   void handle_promotion_failure(oop);
  84 
  85   // In the absence of promotion failure, we wouldn't look at "from-space"
  86   // objects after a young-gen collection.  When promotion fails, however,
  87   // the subsequent full collection will look at from-space objects:
  88   // therefore we must remove their forwarding pointers.
  89   void remove_forwarding_pointers();
  90 
  91   virtual void restore_preserved_marks();
  92 
  93   // Preserved marks
  94   PreservedMarksSet _preserved_marks_set;
  95 
  96   // Promotion failure handling
  97   ExtendedOopClosure *_promo_failure_scan_stack_closure;
  98   void set_promo_failure_scan_stack_closure(ExtendedOopClosure *scan_stack_closure) {
  99     _promo_failure_scan_stack_closure = scan_stack_closure;
 100   }
 101 
 102   Stack<oop, mtGC> _promo_failure_scan_stack;
 103   void drain_promo_failure_scan_stack(void);
 104   bool _promo_failure_drain_in_progress;
 105 
 106   // Performance Counters
 107   GenerationCounters*  _gen_counters;
 108   CSpaceCounters*      _eden_counters;
 109   CSpaceCounters*      _from_counters;
 110   CSpaceCounters*      _to_counters;
 111 
 112   // sizing information