view src/share/vm/oops/objArrayKlassKlass.hpp @ 1091:6aa7255741f3

6906727: UseCompressedOops: some card-marking fixes related to object arrays Summary: Introduced a new write_ref_array(HeapWords* start, size_t count) method that does the requisite MemRegion range calculation so (some of the) clients of the erstwhile write_ref_array(MemRegion mr) do not need to worry. This removed all external uses of array_size(), which was also simplified and made private. Asserts were added to catch other possible issues. Further, less essential, fixes stemming from this investigation are deferred to CR 6904516 (to follow shortly in hs17). Reviewed-by: kvn, coleenp, jmasa
author ysr
date Thu, 03 Dec 2009 15:01:57 -0800
parents a61af66fc99e
children 4e6abf09f540
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/*
 * Copyright 1997-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

// The objArrayKlassKlass is klass for all objArrayKlass'

class objArrayKlassKlass : public arrayKlassKlass {
 public:
  // Testing
  virtual bool oop_is_objArrayKlass() const { return true; }

  // Dispatched operation
  int oop_size(oop obj) const { return objArrayKlass::cast(klassOop(obj))->object_size(); }
  int klass_oop_size() const  { return object_size(); }

  // Allocation
  DEFINE_ALLOCATE_PERMANENT(objArrayKlassKlass);
  static klassOop create_klass(TRAPS);
  klassOop allocate_objArray_klass(int n, KlassHandle element_klass, TRAPS);
  klassOop allocate_system_objArray_klass(TRAPS); // Used for bootstrapping in Universe::genesis

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

  // Sizing
  static int header_size()  { return oopDesc::header_size() + sizeof(objArrayKlassKlass)/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);

  // 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:
  // helpers
  static klassOop allocate_objArray_klass_impl(objArrayKlassKlassHandle this_oop, int n, KlassHandle element_klass, TRAPS);

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

 public:
  // Verification
  const char* internal_name() const;
  void oop_verify_on(oop obj, outputStream* st);

};