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src/share/vm/runtime/virtualspace.hpp

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rev 7280 : 8064457: Introduce compressed oops mode "disjoint base" and improve compressed heap handling.


  87   static size_t allocation_align_size_down(size_t size);
  88 };
  89 
  90 ReservedSpace
  91 ReservedSpace::first_part(size_t partition_size, bool split, bool realloc)
  92 {
  93   return first_part(partition_size, alignment(), split, realloc);
  94 }
  95 
  96 ReservedSpace ReservedSpace::last_part(size_t partition_size)
  97 {
  98   return last_part(partition_size, alignment());
  99 }
 100 
 101 // Class encapsulating behavior specific of memory space reserved for Java heap
 102 class ReservedHeapSpace : public ReservedSpace {
 103 public:
 104   // Constructor
 105   ReservedHeapSpace(size_t size, size_t forced_base_alignment,
 106                     bool large, char* requested_address);

 107 };
 108 
 109 // Class encapsulating behavior specific memory space for Code
 110 class ReservedCodeSpace : public ReservedSpace {
 111  public:
 112   // Constructor
 113   ReservedCodeSpace(size_t r_size, size_t rs_align, bool large);
 114 };
 115 
 116 // VirtualSpace is data structure for committing a previously reserved address range in smaller chunks.
 117 
 118 class VirtualSpace VALUE_OBJ_CLASS_SPEC {
 119   friend class VMStructs;
 120  private:
 121   // Reserved area
 122   char* _low_boundary;
 123   char* _high_boundary;
 124 
 125   // Committed area
 126   char* _low;




  87   static size_t allocation_align_size_down(size_t size);
  88 };
  89 
  90 ReservedSpace
  91 ReservedSpace::first_part(size_t partition_size, bool split, bool realloc)
  92 {
  93   return first_part(partition_size, alignment(), split, realloc);
  94 }
  95 
  96 ReservedSpace ReservedSpace::last_part(size_t partition_size)
  97 {
  98   return last_part(partition_size, alignment());
  99 }
 100 
 101 // Class encapsulating behavior specific of memory space reserved for Java heap
 102 class ReservedHeapSpace : public ReservedSpace {
 103 public:
 104   // Constructor
 105   ReservedHeapSpace(size_t size, size_t forced_base_alignment,
 106                     bool large, char* requested_address);
 107   static size_t noaccess_prefix_size(size_t alignment);
 108 };
 109 
 110 // Class encapsulating behavior specific memory space for Code
 111 class ReservedCodeSpace : public ReservedSpace {
 112  public:
 113   // Constructor
 114   ReservedCodeSpace(size_t r_size, size_t rs_align, bool large);
 115 };
 116 
 117 // VirtualSpace is data structure for committing a previously reserved address range in smaller chunks.
 118 
 119 class VirtualSpace VALUE_OBJ_CLASS_SPEC {
 120   friend class VMStructs;
 121  private:
 122   // Reserved area
 123   char* _low_boundary;
 124   char* _high_boundary;
 125 
 126   // Committed area
 127   char* _low;


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