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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 c18cbe5936b8
line wrap: on
line source

/*
 * Copyright (c) 2007 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.
 *
 */
#ifndef KLASS_PS_H
#define KLASS_PS_H

  // Expands to Parallel Scavenge and Parallel Old declarations

#ifndef SERIALGC
#define PARALLEL_GC_DECLS \
  virtual void oop_copy_contents(PSPromotionManager* pm, oop obj);          \
  virtual void oop_push_contents(PSPromotionManager* pm, oop obj);          \
  /* Parallel Old GC support                                                \
                                                                            \
   The 2-arg version of oop_update_pointers is for objects that are         \
   known not to cross chunk boundaries.  The 4-arg version is for           \
   objects that do (or may) cross chunk boundaries; it updates only those   \
   oops that are in the region [beg_addr, end_addr).  */                    \
  virtual void oop_follow_contents(ParCompactionManager* cm, oop obj);      \
  virtual int  oop_update_pointers(ParCompactionManager* cm, oop obj);      \
  virtual int  oop_update_pointers(ParCompactionManager* cm, oop obj,       \
                                   HeapWord* beg_addr, HeapWord* end_addr);

// Pure virtual version for klass.hpp
#define PARALLEL_GC_DECLS_PV \
  virtual void oop_copy_contents(PSPromotionManager* pm, oop obj) = 0;      \
  virtual void oop_push_contents(PSPromotionManager* pm, oop obj) = 0;      \
  virtual void oop_follow_contents(ParCompactionManager* cm, oop obj) = 0;  \
  virtual int  oop_update_pointers(ParCompactionManager* cm, oop obj) = 0;  \
  virtual int  oop_update_pointers(ParCompactionManager* cm, oop obj,       \
                                   HeapWord* beg_addr, HeapWord* end_addr) = 0;
#else  // SERIALGC
#define PARALLEL_GC_DECLS
#define PARALLEL_GC_DECLS_PV
#endif // SERIALGC

#endif // KLASS_PS_H