Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP

 #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP

 #include "memory/specialized_oop_closures.hpp"

 #include "oops/arrayKlass.hpp"

 #include "oops/instanceKlass.hpp"

 // objArrayKlass is the klass for objArrays

 class objArrayKlass : public arrayKlass {

   friend class VMStructs;

  private:

   klassOop _element_klass;            // The klass of the elements of this array type

   klassOop _bottom_klass;             // The one-dimensional type (instanceKlass or typeArrayKlass)

  public:

   // Instance variables

   klassOop element_klass() const      { return _element_klass; }

   void set_element_klass(klassOop k)  { oop_store_without_check((oop*) &_element_klass, (oop) k); }

   oop* element_klass_addr()           { return (oop*)&_element_klass; }

   klassOop bottom_klass() const       { return _bottom_klass; }

   void set_bottom_klass(klassOop k)   { oop_store_without_check((oop*) &_bottom_klass, (oop) k); }

   oop* bottom_klass_addr()            { return (oop*)&_bottom_klass; }

   // Compiler/Interpreter offset

   static int element_klass_offset_in_bytes() { return offset_of(objArrayKlass, _element_klass); }

   // Dispatched operation

   bool can_be_primary_super_slow() const;

   objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);

   bool compute_is_subtype_of(klassOop k);

   bool oop_is_objArray_slow()  const  { return true; }

   int oop_size(oop obj) const;

   int klass_oop_size() const          { return object_size(); }

   // Allocation

   DEFINE_ALLOCATE_PERMANENT(objArrayKlass);

   objArrayOop allocate(int length, TRAPS);

   oop multi_allocate(int rank, jint* sizes, TRAPS);

   // Copying

   void  copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);

   // Compute protection domain

   oop protection_domain() { return Klass::cast(bottom_klass())->protection_domain(); }

   // Compute class loader

   oop class_loader() const { return Klass::cast(bottom_klass())->class_loader(); }

  private:

   // Either oop or narrowOop depending on UseCompressedOops.

   // must be called from within objArrayKlass.cpp

   template <class T> void do_copy(arrayOop s, T* src, arrayOop d,

                                   T* dst, int length, TRAPS);

  protected:

   // Returns the objArrayKlass for n'th dimension.

   virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);

   // Returns the array class with this class as element type.

   virtual klassOop array_klass_impl(bool or_null, TRAPS);

  public:

   // Casting from klassOop

   static objArrayKlass* cast(klassOop k) {

     assert(k->klass_part()->oop_is_objArray_slow(), "cast to objArrayKlass");

     return (objArrayKlass*) k->klass_part();

   }

   // Sizing

   static int header_size()                { return oopDesc::header_size() + sizeof(objArrayKlass)/HeapWordSize; }

   int object_size() const                 { return arrayKlass::object_size(header_size()); }

   // Initialization (virtual from Klass)

   void initialize(TRAPS);

   // Garbage collection

   void oop_follow_contents(oop obj);

   inline void oop_follow_contents(oop obj, int index);

   template <class T> inline void objarray_follow_contents(oop obj, int index);

   int  oop_adjust_pointers(oop obj);

   // Parallel Scavenge and Parallel Old

   PARALLEL_GC_DECLS

 #ifndef SERIALGC

   inline void oop_follow_contents(ParCompactionManager* cm, oop obj, int index);

   template <class T> inline void

     objarray_follow_contents(ParCompactionManager* cm, oop obj, int index);

 #endif // !SERIALGC

   // Iterators

   int oop_oop_iterate(oop obj, OopClosure* blk) {

     return oop_oop_iterate_v(obj, blk);

   }

   int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {

     return oop_oop_iterate_v_m(obj, blk, mr);

   }

 #define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix)   \

   int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk);         \

   int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk,      \

                                      MemRegion mr);                     \

   int oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* blk,    \

                                      int start, int end);

   ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL)

   ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DECL)

   // JVM support

   jint compute_modifier_flags(TRAPS) const;

  private:

    static klassOop array_klass_impl   (objArrayKlassHandle this_oop, bool or_null, int n, TRAPS);

  public:

   // Printing

   void oop_print_value_on(oop obj, outputStream* st);

 #ifndef PRODUCT

   void oop_print_on      (oop obj, outputStream* st);

 #endif //PRODUCT

   // Verification

   const char* internal_name() const;

   void oop_verify_on(oop obj, outputStream* st);

   void oop_verify_old_oop(oop obj, oop* p, bool allow_dirty);

   void oop_verify_old_oop(oop obj, narrowOop* p, bool allow_dirty);

 };

 #endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP