view src/share/vm/oops/cpCacheKlass.hpp @ 2226:c5a923563727

6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?") Summary: Fix block_size_if_printezis_bits() so it does not expect the bits, only uses them when available. Fix block_size_no_stall() so it does not stall when the bits are missing such cases, letting the caller deal with zero size returns. Constant pool cache oops do not need to be unparsable or conc_unsafe after their klass pointer is installed. Some cosmetic clean-ups and some assertion checking for conc-usafety which, in the presence of class file redefinition, has no a-priori time boundedness, so all GCs must be able to safely deal with putatively conc-unsafe objects in a stop-world pause. Reviewed-by: jmasa, johnc
author ysr
date Mon, 07 Feb 2011 22:19:57 -0800
parents f95d63e2154a
children 1d1603768966
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/*
 * Copyright (c) 1998, 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_CPCACHEKLASS_HPP
#define SHARE_VM_OOPS_CPCACHEKLASS_HPP

#include "oops/arrayKlass.hpp"
#include "oops/cpCacheOop.hpp"
#include "oops/instanceKlass.hpp"

class constantPoolCacheKlass: public Klass {
  juint    _alloc_size;        // allocation profiling support
 public:
  // Dispatched klass operations
  bool oop_is_constantPoolCache() const          { return true; }
  int  oop_size(oop obj) const;
  int  klass_oop_size() const                    { return object_size(); }

  // Allocation
  DEFINE_ALLOCATE_PERMANENT(constantPoolCacheKlass);
  constantPoolCacheOop allocate(int length, TRAPS);
  static klassOop create_klass(TRAPS);

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

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

  // Allocation profiling support
  juint alloc_size() const              { return _alloc_size; }
  void set_alloc_size(juint n)          { _alloc_size = n; }

  // Printing
  void oop_print_value_on(oop obj, outputStream* st);
  void oop_print_on(oop obj, outputStream* st);

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

#endif // SHARE_VM_OOPS_CPCACHEKLASS_HPP