39   static ReservedSpace* _shared_rs;
  40   static int _max_alignment;
  41 
  42  public:
  43   enum {
  44     vtbl_list_size = 17, // number of entries in the shared space vtable list.
  45     num_virtuals = 200   // maximum number of virtual functions
  46                          // If virtual functions are added to Metadata,
  47                          // this number needs to be increased.  Also,
  48                          // SharedMiscCodeSize will need to be increased.
  49   };
  50 
  51   enum {
  52     ro = 0,  // read-only shared space in the heap
  53     rw = 1,  // read-write shared space in the heap
  54     md = 2,  // miscellaneous data for initializing tables, etc.
  55     mc = 3,  // miscellaneous code - vtable replacement.
  56     n_regions = 4
  57   };
  58 
  59   static void set_max_alignment(int alignment) KERNEL_RETURN;
  60   static int max_alignment()                   KERNEL_RETURN_(0);



















  61 
  62   static void preload_and_dump(TRAPS) KERNEL_RETURN;
  63   static ReservedSpace* shared_rs();
  64   static void set_shared_rs(ReservedSpace* rs) KERNEL_RETURN;
  65 
  66   static bool map_shared_spaces(FileMapInfo* mapinfo) KERNEL_RETURN_(false);
  67   static void initialize_shared_spaces() KERNEL_RETURN;
  68 
  69   // Return true if given address is in the mapped shared space.
  70   static bool is_in_shared_space(const void* p) KERNEL_RETURN_(false);
  71 
  72   static void generate_vtable_methods(void** vtbl_list,
  73                                       void** vtable,
  74                                       char** md_top, char* md_end,
  75                                       char** mc_top, char* mc_end);
  76   static void serialize(SerializeClosure* sc);
  77 
  78   // JVM/TI RedefineClasses() support:
  79   // Remap the shared readonly space to shared readwrite, private if
  80   // sharing is enabled. Simply returns true if sharing is not enabled
  81   // or if the remapping has already been done by a prior call.
  82   static bool remap_shared_readonly_as_readwrite() KERNEL_RETURN_(true);
  83 
  84   static void print_shared_spaces();
  85 };
  86 #endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP

  39   static ReservedSpace* _shared_rs;
  40   static int _max_alignment;
  41 
  42  public:
  43   enum {
  44     vtbl_list_size = 17, // number of entries in the shared space vtable list.
  45     num_virtuals = 200   // maximum number of virtual functions
  46                          // If virtual functions are added to Metadata,
  47                          // this number needs to be increased.  Also,
  48                          // SharedMiscCodeSize will need to be increased.
  49   };
  50 
  51   enum {
  52     ro = 0,  // read-only shared space in the heap
  53     rw = 1,  // read-write shared space in the heap
  54     md = 2,  // miscellaneous data for initializing tables, etc.
  55     mc = 3,  // miscellaneous code - vtable replacement.
  56     n_regions = 4
  57   };
  58 
  59   // Accessor functions to save shared space created for metadata, which has
  60   // extra space allocated at the end for miscellaneous data and code.
  61   static void set_max_alignment(int alignment) {
  62     CDS_ONLY(_max_alignment = alignment);
  63   }
  64 
  65   static int max_alignment() {
  66     CDS_ONLY(return _max_alignment);
  67     NOT_CDS(return 0);
  68   }
  69 
  70   static void preload_and_dump(TRAPS) NOT_CDS_RETURN;
  71 
  72   static ReservedSpace* shared_rs() {
  73     CDS_ONLY(return _shared_rs);
  74     NOT_CDS(return NULL);
  75   }
  76 
  77   static void set_shared_rs(ReservedSpace* rs) {
  78     CDS_ONLY(_shared_rs = rs;)
  79   }
  80 
  81   static bool map_shared_spaces(FileMapInfo* mapinfo) NOT_CDS_RETURN_(false);
  82   static void initialize_shared_spaces() NOT_CDS_RETURN;




  83 
  84   // Return true if given address is in the mapped shared space.
  85   static bool is_in_shared_space(const void* p) NOT_CDS_RETURN_(false);
  86 
  87   static void generate_vtable_methods(void** vtbl_list,
  88                                       void** vtable,
  89                                       char** md_top, char* md_end,
  90                                       char** mc_top, char* mc_end);
  91   static void serialize(SerializeClosure* sc);
  92 
  93   // JVM/TI RedefineClasses() support:
  94   // Remap the shared readonly space to shared readwrite, private if
  95   // sharing is enabled. Simply returns true if sharing is not enabled
  96   // or if the remapping has already been done by a prior call.
  97   static bool remap_shared_readonly_as_readwrite() NOT_CDS_RETURN_(true);
  98 
  99   static void print_shared_spaces();
 100 };
 101 #endif // SHARE_VM_MEMORY_METASPACE_SHARED_HPP