329   static Klass** doubleArrayKlassObj_addr()         { return &_doubleArrayKlassObj; }
 330   static Klass** objectArrayKlassObj_addr()         { return &_objectArrayKlassObj; }
 331 
 332   // The particular choice of collected heap.
 333   static CollectedHeap* heap() { return _collectedHeap; }
 334 
 335   // For UseCompressedOops
 336   // Narrow Oop encoding mode:
 337   // 0 - Use 32-bits oops without encoding when
 338   //     NarrowOopHeapBaseMin + heap_size < 4Gb
 339   // 1 - Use zero based compressed oops with encoding when
 340   //     NarrowOopHeapBaseMin + heap_size < 32Gb
 341   // 2 - Use compressed oops with heap base + encoding.
 342   enum NARROW_OOP_MODE {
 343     UnscaledNarrowOop  = 0,
 344     ZeroBasedNarrowOop = 1,
 345     HeapBasedNarrowOop = 2
 346   };
 347   static NARROW_OOP_MODE narrow_oop_mode();
 348   static const char* narrow_oop_mode_to_string(NARROW_OOP_MODE mode);
 349   static char*    preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode);
 350   static char*    preferred_metaspace_base(size_t heap_size, NARROW_OOP_MODE mode);
 351   static address  narrow_oop_base()                       { return  _narrow_oop._base; }
 352   static bool  is_narrow_oop_base(void* addr)             { return (narrow_oop_base() == (address)addr); }
 353   static int      narrow_oop_shift()                      { return  _narrow_oop._shift; }
 354   static bool     narrow_oop_use_implicit_null_checks()   { return  _narrow_oop._use_implicit_null_checks; }
 355 
 356   // For UseCompressedKlassPointers
 357   static address  narrow_klass_base()                     { return  _narrow_klass._base; }
 358   static bool  is_narrow_klass_base(void* addr)           { return (narrow_klass_base() == (address)addr); }
 359   static int      narrow_klass_shift()                    { return  _narrow_klass._shift; }
 360   static bool     narrow_klass_use_implicit_null_checks() { return  _narrow_klass._use_implicit_null_checks; }
 361 
 362   static address* narrow_ptrs_base_addr()                 { return &_narrow_ptrs_base; }
 363   static void     set_narrow_ptrs_base(address a)         { _narrow_ptrs_base = a; }
 364   static address  narrow_ptrs_base()                      { return _narrow_ptrs_base; }
 365 
 366   // this is set in vm_version on sparc (and then reset in universe afaict)
 367   static void     set_narrow_oop_shift(int shift)         {
 368     _narrow_oop._shift   = shift;
 369   }

 329   static Klass** doubleArrayKlassObj_addr()         { return &_doubleArrayKlassObj; }
 330   static Klass** objectArrayKlassObj_addr()         { return &_objectArrayKlassObj; }
 331 
 332   // The particular choice of collected heap.
 333   static CollectedHeap* heap() { return _collectedHeap; }
 334 
 335   // For UseCompressedOops
 336   // Narrow Oop encoding mode:
 337   // 0 - Use 32-bits oops without encoding when
 338   //     NarrowOopHeapBaseMin + heap_size < 4Gb
 339   // 1 - Use zero based compressed oops with encoding when
 340   //     NarrowOopHeapBaseMin + heap_size < 32Gb
 341   // 2 - Use compressed oops with heap base + encoding.
 342   enum NARROW_OOP_MODE {
 343     UnscaledNarrowOop  = 0,
 344     ZeroBasedNarrowOop = 1,
 345     HeapBasedNarrowOop = 2
 346   };
 347   static NARROW_OOP_MODE narrow_oop_mode();
 348   static const char* narrow_oop_mode_to_string(NARROW_OOP_MODE mode);
 349   static char*    preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode);
 350   static char*    preferred_metaspace_base(size_t heap_size, NARROW_OOP_MODE mode);
 351   static address  narrow_oop_base()                       { return  _narrow_oop._base; }
 352   static bool  is_narrow_oop_base(void* addr)             { return (narrow_oop_base() == (address)addr); }
 353   static int      narrow_oop_shift()                      { return  _narrow_oop._shift; }
 354   static bool     narrow_oop_use_implicit_null_checks()   { return  _narrow_oop._use_implicit_null_checks; }
 355 
 356   // For UseCompressedKlassPointers
 357   static address  narrow_klass_base()                     { return  _narrow_klass._base; }
 358   static bool  is_narrow_klass_base(void* addr)           { return (narrow_klass_base() == (address)addr); }
 359   static int      narrow_klass_shift()                    { return  _narrow_klass._shift; }
 360   static bool     narrow_klass_use_implicit_null_checks() { return  _narrow_klass._use_implicit_null_checks; }
 361 
 362   static address* narrow_ptrs_base_addr()                 { return &_narrow_ptrs_base; }
 363   static void     set_narrow_ptrs_base(address a)         { _narrow_ptrs_base = a; }
 364   static address  narrow_ptrs_base()                      { return _narrow_ptrs_base; }
 365 
 366   // this is set in vm_version on sparc (and then reset in universe afaict)
 367   static void     set_narrow_oop_shift(int shift)         {
 368     _narrow_oop._shift   = shift;
 369   }