1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.utilities;
  26 
  27 import java.util.*;
  28 import sun.jvm.hotspot.debugger.*;
  29 import sun.jvm.hotspot.runtime.*;
  30 import sun.jvm.hotspot.oops.*;
  31 import sun.jvm.hotspot.types.*;
  32 
  33 public class GenericGrowableArray extends VMObject {
  34   static {
  35     VM.registerVMInitializedObserver(new Observer() {
  36         public void update(Observable o, Object data) {
  37           initialize(VM.getVM().getTypeDataBase());
  38         }
  39       });
  40   }
  41 
  42   private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
  43     Type type      = db.lookupType("GenericGrowableArray");
  44     _arena_field = type.getAddressField("_arena");
  45     _max_field = new CIntField(type.getCIntegerField("_max"), 0);
  46     _len_field = new CIntField(type.getCIntegerField("_len"), 0);
  47   }
  48 
  49   private static AddressField _arena_field;
  50   private static CIntField _max_field;
  51   private static CIntField _len_field;
  52 
  53   public int max() {
  54     return (int)_max_field.getValue(getAddress());
  55   }
  56 
  57   public int length() {
  58     return (int)_len_field.getValue(getAddress());
  59   }
  60 
  61   public GenericGrowableArray(Address addr) {
  62     super(addr);
  63   }
  64 }