src/hotspot/share/gc/z/zPage.hpp

*** 33,62 ****
  class ZPage : public CHeapObj<mtGC> {
    friend class VMStructs;
    friend class ZList<ZPage>;
  
  private:
!   // Always hot
!   const uint8_t        _type;             // Page type
!   uint8_t              _numa_id;          // NUMA node affinity
!   uint32_t             _seqnum;           // Allocation sequence number
!   const ZVirtualMemory _virtual;          // Virtual start/end address
!   volatile uintptr_t   _top;              // Virtual top address
!   ZLiveMap             _livemap;          // Live map
! 
!   // Hot when relocated and cached
!   ZPhysicalMemory      _physical;         // Physical memory for page
!   ZListNode<ZPage>     _node;             // Page list node
  
    const char* type_to_string() const;
  
    bool is_object_marked(uintptr_t addr) const;
    bool is_object_strongly_marked(uintptr_t addr) const;
  
  public:
!   ZPage(uint8_t type, ZVirtualMemory vmem, ZPhysicalMemory pmem);
!   ~ZPage();
  
    uint32_t object_max_count() const;
    size_t object_alignment_shift() const;
    size_t object_alignment() const;
  
--- 33,63 ----
  class ZPage : public CHeapObj<mtGC> {
    friend class VMStructs;
    friend class ZList<ZPage>;
  
  private:
!   uint8_t            _type;
!   uint8_t            _numa_id;
!   uint32_t           _seqnum;
!   ZVirtualMemory     _virtual;
!   volatile uintptr_t _top;
!   ZLiveMap           _livemap;
!   uint64_t           _last_used;
!   ZPhysicalMemory    _physical;
!   ZListNode<ZPage>   _node;
  
+   void assert_initialized() const;
+ 
+   uint8_t type_from_size(size_t size) const;
    const char* type_to_string() const;
  
    bool is_object_marked(uintptr_t addr) const;
    bool is_object_strongly_marked(uintptr_t addr) const;
  
  public:
!   ZPage(const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem);
!   ZPage(uint8_t type, const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem);
  
    uint32_t object_max_count() const;
    size_t object_alignment_shift() const;
    size_t object_alignment() const;
  
*** 67,81 ****
    uintptr_t top() const;
    size_t remaining() const;
  
    uint8_t numa_id();
  
!   ZPhysicalMemory& physical_memory();
    const ZVirtualMemory& virtual_memory() const;
  
    void reset();
  
    bool is_in(uintptr_t addr) const;
  
    uintptr_t block_start(uintptr_t addr) const;
    bool block_is_obj(uintptr_t addr) const;
  
--- 68,89 ----
    uintptr_t top() const;
    size_t remaining() const;
  
    uint8_t numa_id();
  
!   uint64_t last_used() const;
!   void set_last_used();
! 
!   const ZPhysicalMemory& physical_memory() const;
    const ZVirtualMemory& virtual_memory() const;
  
    void reset();
  
+   ZPage* retype(uint8_t type);
+   ZPage* split(size_t size);
+   ZPage* split(uint8_t type, size_t size);
+ 
    bool is_in(uintptr_t addr) const;
  
    uintptr_t block_start(uintptr_t addr) const;
    bool block_is_obj(uintptr_t addr) const;