vm/oops/instanceKlassKlass.hpp

/*
 * Copyright (c) 1997, 2012, 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.
 *
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#ifndef SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP
#define SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP

#include "memory/referenceType.hpp"
#include "oops/klassKlass.hpp"

// An instanceKlassKlass is the klass of an instanceKlass

class instanceKlassKlass : public klassKlass {
 public:
  // Dispatched operation
  bool oop_is_klass() const           { return true; }
  bool oop_is_instanceKlass() const   { return true; }

  int oop_size(oop obj) const;
  int klass_oop_size() const    { return object_size(); }

  // Allocation
  DEFINE_ALLOCATE_PERMANENT(instanceKlassKlass);
  static klassOop create_klass(TRAPS);
  klassOop allocate_instance_klass(Symbol* name,
                                   int vtable_len,
                                   int itable_len,
                                   int static_field_size,
                                   unsigned int nonstatic_oop_map_count,
                                   AccessFlags access_flags,
                                   ReferenceType rt,
                                   KlassHandle host_klass,
                                   TRAPS);

  // Casting from klassOop
  static instanceKlassKlass* cast(klassOop k) {
    assert(k->klass_part()->oop_is_klass(), "cast to instanceKlassKlass");
    return (instanceKlassKlass*) k->klass_part();
  }

  // Sizing
  static int header_size()    { return oopDesc::header_size() + sizeof(instanceKlassKlass)/HeapWordSize; }
  int object_size() const     { return align_object_size(header_size()); }

  // Garbage collection
  void oop_follow_contents(oop obj);
  int  oop_adjust_pointers(oop obj);
  bool oop_is_parsable(oop obj) const;

  // Parallel Scavenge and Parallel Old
  PARALLEL_GC_DECLS

  // Iterators
  int oop_oop_iterate(oop obj, OopClosure* blk);
  int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);

private:
  // Apply closure to the InstanceKlass oops that are outside the java heap.
  inline void iterate_c_heap_oops(instanceKlass* ik, OopClosure* closure);

 public:
  // Printing
  void oop_print_value_on(oop obj, outputStream* st);
#ifndef PRODUCT
  void oop_print_on(oop obj, outputStream* st);
#endif

  // Verification
  const char* internal_name() const;
  void oop_verify_on(oop obj, outputStream* st);
  // tells whether obj is partially constructed (gc during class loading)
  bool oop_partially_loaded(oop obj) const;
  void oop_set_partially_loaded(oop obj);
};

#endif // SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP