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1 /*
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2 * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.memory;
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26
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27 import java.util.*;
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28
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.runtime.*;
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31 import sun.jvm.hotspot.types.*;
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32
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33 /** Factory containing a VirtualConstructor suitable for instantiating
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34 wrapper objects for all types of generations */
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35
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36 public class GenerationFactory {
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37 private static VirtualConstructor ctor;
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38
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39 static {
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40 VM.registerVMInitializedObserver(new Observer() {
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41 public void update(Observable o, Object data) {
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42 initialize(VM.getVM().getTypeDataBase());
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43 }
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44 });
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45 }
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46
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47 private static synchronized void initialize(TypeDataBase db) {
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48 ctor = new VirtualConstructor(db);
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49
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50 ctor.addMapping("CompactingPermGenGen", CompactingPermGenGen.class);
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51 ctor.addMapping("CMSPermGenGen", CMSPermGenGen.class);
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52 ctor.addMapping("DefNewGeneration", DefNewGeneration.class);
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53 ctor.addMapping("ParNewGeneration", ParNewGeneration.class);
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54 ctor.addMapping("TenuredGeneration", TenuredGeneration.class);
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55 ctor.addMapping("ConcurrentMarkSweepGeneration", ConcurrentMarkSweepGeneration.class);
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56 }
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57
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58 public static Generation newObject(Address addr) {
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59 try {
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60 return (Generation) ctor.instantiateWrapperFor(addr);
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61 } catch (WrongTypeException e) {
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62 return new Generation(addr) {
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63 public String name() {
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64 return "unknown generation type";
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65 }
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66 public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
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67 }
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68 public void printOn(java.io.PrintStream tty) {
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69 tty.println("unknown subtype of Generation @ " + getAddress() + " (" +
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70 virtualSpace().low() + "," + virtualSpace().high() + ")");
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71 }
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72 public long used() {
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73 return 0;
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74 }
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75 public long free() {
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76 return 0;
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77 }
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78 public long capacity() {
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79 return 0;
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80 }
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81 public long contiguousAvailable() {
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82 return 0;
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83 }
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84
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85 };
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86 }
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87 }
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88 }
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