src/hotspot/share/memory/universe.hpp

rev 48545 : Value-based classes (vbc) / Oop value test via metadata ptr

*** 193,203 ****
    // For UseCompressedOops.
    static struct NarrowPtrStruct _narrow_oop;
    // For UseCompressedClassPointers.
    static struct NarrowPtrStruct _narrow_klass;
    static address _narrow_ptrs_base;
! 
    // array of dummy objects used with +FullGCAlot
    debug_only(static objArrayOop _fullgc_alot_dummy_array;)
    // index of next entry to clear
    debug_only(static int         _fullgc_alot_dummy_next;)
  
--- 193,205 ----
    // For UseCompressedOops.
    static struct NarrowPtrStruct _narrow_oop;
    // For UseCompressedClassPointers.
    static struct NarrowPtrStruct _narrow_klass;
    static address _narrow_ptrs_base;
! #if INCLUDE_VBC
!   static int     _oop_metadata_odd_mask;
! #endif
    // array of dummy objects used with +FullGCAlot
    debug_only(static objArrayOop _fullgc_alot_dummy_array;)
    // index of next entry to clear
    debug_only(static int         _fullgc_alot_dummy_next;)
  
*** 436,447 ****
--- 438,457 ----
    }
  
    static void     set_narrow_klass_shift(int shift)       {
      assert(shift == 0 || shift == LogKlassAlignmentInBytes, "invalid shift for klass ptrs");
      _narrow_klass._shift   = shift;
+ #if INCLUDE_VBC
+     _oop_metadata_odd_mask = (shift) ? 1 : KlassPtrEvenOddMask;
+ #endif
    }
  
+ #if INCLUDE_VBC
+   static int oop_metadata_odd_mask() { return _oop_metadata_odd_mask; }
+ #endif
+ 
+ 
    // Reserve Java heap and determine CompressedOops mode
    static ReservedSpace reserve_heap(size_t heap_size, size_t alignment);
  
    // Historic gc information
    static size_t get_heap_capacity_at_last_gc()         { return _heap_capacity_at_last_gc; }