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src/share/vm/oops/objArrayKlass.hpp

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  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP
  26 #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP
  27 
  28 #include "classfile/classLoaderData.hpp"
  29 #include "oops/arrayKlass.hpp"
  30 #include "utilities/macros.hpp"
  31 
  32 // ObjArrayKlass is the klass for objArrays
  33 
  34 class ObjArrayKlass : public ArrayKlass {
  35   friend class VMStructs;
  36   friend class JVMCIVMStructs;
  37  private:
  38   Klass* _element_klass;            // The klass of the elements of this array type
  39   Klass* _bottom_klass;             // The one-dimensional type (InstanceKlass or TypeArrayKlass)
  40 
  41   // Constructor
  42   ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name);
  43   static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS);
  44  public:
  45   // For dummy objects
  46   ObjArrayKlass() {}
  47 
  48   // Instance variables
  49   Klass* element_klass() const      { return _element_klass; }
  50   void set_element_klass(Klass* k)  { _element_klass = k; }
  51   Klass** element_klass_addr()      { return &_element_klass; }
  52 
  53   Klass* bottom_klass() const       { return _bottom_klass; }
  54   void set_bottom_klass(Klass* k)   { _bottom_klass = k; }
  55   Klass** bottom_klass_addr()       { return &_bottom_klass; }
  56 
  57   ModuleEntry* module() const;
  58   PackageEntry* package() const;
  59 
  60   // Compiler/Interpreter offset
  61   static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); }
  62 
  63   // Dispatched operation
  64   bool can_be_primary_super_slow() const;
  65   GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
  66   bool compute_is_subtype_of(Klass* k);
  67   DEBUG_ONLY(bool is_objArray_klass_slow()  const  { return true; })
  68   int oop_size(oop obj) const;
  69 
  70   // Allocation
  71   static Klass* allocate_objArray_klass(ClassLoaderData* loader_data,
  72                                           int n, KlassHandle element_klass, TRAPS);
  73 
  74   objArrayOop allocate(int length, TRAPS);
  75   oop multi_allocate(int rank, jint* sizes, TRAPS);
  76 
  77   // Copying
  78   void  copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
  79 
  80   // Compute protection domain
  81   oop protection_domain() const { return bottom_klass()->protection_domain(); }
  82 
  83  private:
  84   // Either oop or narrowOop depending on UseCompressedOops.
  85   // must be called from within ObjArrayKlass.cpp
  86   template <class T> void do_copy(arrayOop s, T* src, arrayOop d,
  87                                   T* dst, int length, TRAPS);
  88  protected:
  89   // Returns the ObjArrayKlass for n'th dimension.
  90   virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
  91 
  92   // Returns the array class with this class as element type.




  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP
  26 #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP
  27 
  28 #include "classfile/classLoaderData.hpp"
  29 #include "oops/arrayKlass.hpp"
  30 #include "utilities/macros.hpp"
  31 
  32 // ObjArrayKlass is the klass for objArrays
  33 
  34 class ObjArrayKlass : public ArrayKlass {
  35   friend class VMStructs;
  36   friend class JVMCIVMStructs;
  37  private:
  38   Klass* _element_klass;            // The klass of the elements of this array type
  39   Klass* _bottom_klass;             // The one-dimensional type (InstanceKlass or TypeArrayKlass)
  40 
  41   // Constructor
  42   ObjArrayKlass(int n, Klass* element_klass, Symbol* name);
  43   static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, TRAPS);
  44  public:
  45   // For dummy objects
  46   ObjArrayKlass() {}
  47 
  48   // Instance variables
  49   Klass* element_klass() const      { return _element_klass; }
  50   void set_element_klass(Klass* k)  { _element_klass = k; }
  51   Klass** element_klass_addr()      { return &_element_klass; }
  52 
  53   Klass* bottom_klass() const       { return _bottom_klass; }
  54   void set_bottom_klass(Klass* k)   { _bottom_klass = k; }
  55   Klass** bottom_klass_addr()       { return &_bottom_klass; }
  56 
  57   ModuleEntry* module() const;
  58   PackageEntry* package() const;
  59 
  60   // Compiler/Interpreter offset
  61   static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); }
  62 
  63   // Dispatched operation
  64   bool can_be_primary_super_slow() const;
  65   GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
  66   bool compute_is_subtype_of(Klass* k);
  67   DEBUG_ONLY(bool is_objArray_klass_slow()  const  { return true; })
  68   int oop_size(oop obj) const;
  69 
  70   // Allocation
  71   static Klass* allocate_objArray_klass(ClassLoaderData* loader_data,
  72                                           int n, Klass* element_klass, TRAPS);
  73 
  74   objArrayOop allocate(int length, TRAPS);
  75   oop multi_allocate(int rank, jint* sizes, TRAPS);
  76 
  77   // Copying
  78   void  copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
  79 
  80   // Compute protection domain
  81   oop protection_domain() const { return bottom_klass()->protection_domain(); }
  82 
  83  private:
  84   // Either oop or narrowOop depending on UseCompressedOops.
  85   // must be called from within ObjArrayKlass.cpp
  86   template <class T> void do_copy(arrayOop s, T* src, arrayOop d,
  87                                   T* dst, int length, TRAPS);
  88  protected:
  89   // Returns the ObjArrayKlass for n'th dimension.
  90   virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
  91 
  92   // Returns the array class with this class as element type.


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