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1 /*
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2 * Copyright 2003-2005 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 import sun.jvm.hotspot.debugger.*;
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29 import sun.jvm.hotspot.oops.*;
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30 import sun.jvm.hotspot.types.*;
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31 import sun.jvm.hotspot.runtime.*;
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32 import sun.jvm.hotspot.utilities.*;
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33
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34 public class DictionaryEntry extends sun.jvm.hotspot.utilities.HashtableEntry {
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35 static {
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36 VM.registerVMInitializedObserver(new Observer() {
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37 public void update(Observable o, Object data) {
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38 initialize(VM.getVM().getTypeDataBase());
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39 }
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40 });
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41 }
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42
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43 private static synchronized void initialize(TypeDataBase db) {
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44 Type type = db.lookupType("DictionaryEntry");
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45 pdSetField = type.getAddressField("_pd_set");
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46 loaderField = type.getOopField("_loader");
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47 }
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48
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49 // Fields
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50 private static AddressField pdSetField;
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51 private static sun.jvm.hotspot.types.OopField loaderField;
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52
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53 // Accessors
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54
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55 public ProtectionDomainEntry pdSet() {
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56 Address tmp = pdSetField.getValue(addr);
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57 return (ProtectionDomainEntry) VMObjectFactory.newObject(
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58 ProtectionDomainEntry.class, tmp);
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59 }
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60
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61 public Oop loader() {
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62 return VM.getVM().getObjectHeap().newOop(loaderField.getValue(addr));
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63 }
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64
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65 public Klass klass() {
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66 return (Klass) literal();
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67 }
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68
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69 public DictionaryEntry(Address addr) {
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70 super(addr);
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71 }
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72
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73 public boolean equals(Symbol className, Oop classLoader) {
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74 InstanceKlass ik = (InstanceKlass) klass();
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75 Oop loader = loader();
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76 if (! ik.getName().equals(className)) {
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77 return false;
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78 } else {
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79 return (loader == null)? (classLoader == null) :
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80 (loader.equals(classLoader));
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81 }
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82 }
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83
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84 public boolean isValidProtectionDomain(Oop protectionDomain) {
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85 if (protectionDomain == null) {
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86 return true;
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87 } else {
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88 return containsProtectionDomain(protectionDomain);
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89 }
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90 }
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91
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92 public boolean containsProtectionDomain(Oop protectionDomain) {
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93 InstanceKlass ik = (InstanceKlass) klass();
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94 if (protectionDomain.equals(ik.getProtectionDomain())) {
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95 return true; // Succeeds trivially
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96 }
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97 for (ProtectionDomainEntry current = pdSet(); current != null;
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98 current = current.next()) {
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99 if (protectionDomain.equals(current.protectionDomain())) {
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100 return true;
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101 }
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102 }
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103 return false;
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104 }
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105
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106 /* covariant return type :-(
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107 public DictionaryEntry next() {
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108 return (DictionaryEntry) super.next();
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109 }
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110 For now, let the caller cast it ..
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111 */
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112 }
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