1 #ifdef USE_PRAGMA_IDENT_HDR
   2 #pragma ident "@(#)genMarkSweep.hpp     1.11 07/05/05 17:05:49 JVM"
   3 #endif
   4 /*
   5  * Copyright 2001-2004 Sun Microsystems, Inc.  All Rights Reserved.
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This code is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 only, as
  10  * published by the Free Software Foundation.
  11  *
  12  * This code is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * version 2 for more details (a copy is included in the LICENSE file that
  16  * accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License version
  19  * 2 along with this work; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *  
  26  */
  27 
  28 class GenMarkSweep : public MarkSweep {
  29   friend class VM_MarkSweep;
  30   friend class G1MarkSweep;
  31  public:
  32   static void invoke_at_safepoint(int level, ReferenceProcessor* rp,
  33                                   bool clear_all_softrefs);
  34 
  35  private:
  36 
  37   // Mark live objects
  38   static void mark_sweep_phase1(int level, bool clear_all_softrefs);
  39   // Calculate new addresses
  40   static void mark_sweep_phase2();
  41   // Update pointers
  42   static void mark_sweep_phase3(int level);
  43   // Move objects to new positions
  44   static void mark_sweep_phase4();
  45 
  46   // Temporary data structures for traversal and storing/restoring marks
  47   static void allocate_stacks();
  48   static void deallocate_stacks();
  49 };