src/share/vm/gc/g1/heapRegion.hpp

rev 13047 : imported patch 8071280-specialize-heapregion-oops-on-card-seq-iterate
rev 13048 : imported patch 8071280-kim-review
rev 13049 : imported patch 8071280-kim-sangheon-review
rev 13050 : imported patch 8071280-erikh-review

*** 249,261 ****
  
    void report_region_type_change(G1HeapRegionTraceType::Type to);
  
    // Returns whether the given object address refers to a dead object, and either the
    // size of the object (if live) or the size of the block (if dead) in size.
!   // Performs some optimizations if is_gc_active is set.
!   template <bool is_gc_active>
!   inline bool is_obj_dead_with_size(const oop obj, G1CMBitMapRO* bitmap, size_t* size) const;
  
   protected:
    // The index of this region in the heap region sequence.
    uint  _hrm_index;
  
--- 249,262 ----
  
    void report_region_type_change(G1HeapRegionTraceType::Type to);
  
    // Returns whether the given object address refers to a dead object, and either the
    // size of the object (if live) or the size of the block (if dead) in size.
!   // May
!   // - only called with obj < top()
!   // - not called on humongous objects or archive regions
!   inline bool is_obj_dead_with_size(const oop obj, G1CMBitMapRO* prev_bitmap, size_t* size) const;
  
   protected:
    // The index of this region in the heap region sequence.
    uint  _hrm_index;
  
*** 327,337 ****
                                             Closure* cl,
                                             G1CollectedHeap* g1h);
  
    // Returns the block size of the given (dead, potentially having its class unloaded) object
    // starting at p extending to at most the prev TAMS using the given mark bitmap.
!   inline size_t block_size_using_bitmap(const HeapWord* p, const G1CMBitMapRO* bitmap) const;
   public:
    HeapRegion(uint hrm_index,
               G1BlockOffsetTable* bot,
               MemRegion mr);
  
--- 328,338 ----
                                             Closure* cl,
                                             G1CollectedHeap* g1h);
  
    // Returns the block size of the given (dead, potentially having its class unloaded) object
    // starting at p extending to at most the prev TAMS using the given mark bitmap.
!   inline size_t block_size_using_bitmap(const HeapWord* p, const G1CMBitMapRO* prev_bitmap) const;
   public:
    HeapRegion(uint hrm_index,
               G1BlockOffsetTable* bot,
               MemRegion mr);
  
*** 374,389 ****
    static void setup_heap_region_size(size_t initial_heap_size, size_t max_heap_size);
  
    // All allocated blocks are occupied by objects in a HeapRegion
    bool block_is_obj(const HeapWord* p) const;
  
!   // Returns the object size for valid block starts for potentially unloaded dead
!   // objects. Must only be called during scanning cards during GC. Expects the
!   // following preconditions:
!   // - only called on p < top()
!   // - not called on humongous objects or archive regions
!   size_t block_size_during_gc(const HeapWord* p, const G1CMBitMapRO* bitmap) const;
  
    // Returns the object size for all valid block starts
    // and the amount of unallocated words if called on top()
    size_t block_size(const HeapWord* p) const;
  
--- 375,386 ----
    static void setup_heap_region_size(size_t initial_heap_size, size_t max_heap_size);
  
    // All allocated blocks are occupied by objects in a HeapRegion
    bool block_is_obj(const HeapWord* p) const;
  
!   // Returns whether the given object is dead based on TAMS and bitmap.
!   bool is_obj_dead(const oop obj, const G1CMBitMapRO* prev_bitmap) const;
  
    // Returns the object size for all valid block starts
    // and the amount of unallocated words if called on top()
    size_t block_size(const HeapWord* p) const;
  
*** 676,687 ****
      }
    }
  
    // Iterate over the objects overlapping part of a card, applying cl
    // to all references in the region.  This is a helper for
!   // G1RemSet::refine_card, and is tightly coupled with it.
!   // mr: the memory region covered by the card, trimmed to the
    // allocated space for this region.  Must not be empty.
    // This region must be old or humongous.
    // Returns true if the designated objects were successfully
    // processed, false if an unparsable part of the heap was
    // encountered; that only happens when invoked concurrently with the
--- 673,684 ----
      }
    }
  
    // Iterate over the objects overlapping part of a card, applying cl
    // to all references in the region.  This is a helper for
!   // G1RemSet::refine_card*, and is tightly coupled with them.
!   // mr is the memory region covered by the card, trimmed to the
    // allocated space for this region.  Must not be empty.
    // This region must be old or humongous.
    // Returns true if the designated objects were successfully
    // processed, false if an unparsable part of the heap was
    // encountered; that only happens when invoked concurrently with the