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1 /*
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2 * Copyright 2002-2003 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.jdi;
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26
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27 import sun.jvm.hotspot.oops.Oop;
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28 import sun.jvm.hotspot.oops.Instance;
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29 import sun.jvm.hotspot.oops.Klass;
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30 import sun.jvm.hotspot.memory.SystemDictionary;
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31 import sun.jvm.hotspot.memory.Universe;
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32 import sun.jvm.hotspot.runtime.VM;
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33
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34 import com.sun.jdi.*;
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35 import java.util.*;
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36
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37 public class ClassLoaderReferenceImpl
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38 extends ObjectReferenceImpl
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39 implements ClassLoaderReference
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40 {
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41 // because we work on process snapshot or core we can
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42 // cache visibleClasses & definedClasses always (i.e., no suspension)
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43 private List visibleClassesCache;
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44 private List definedClassesCache;
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45
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46 ClassLoaderReferenceImpl(VirtualMachine aVm, Instance oRef) {
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47 super(aVm, oRef);
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48 }
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49
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50 protected String description() {
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51 return "ClassLoaderReference " + uniqueID();
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52 }
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53
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54 public List definedClasses() {
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55 if (definedClassesCache == null) {
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56 definedClassesCache = new ArrayList();
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57 Iterator iter = vm.allClasses().iterator();
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58 while (iter.hasNext()) {
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59 ReferenceType type = (ReferenceType)iter.next();
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60 if (equals(type.classLoader())) { /* thanks OTI */
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61 definedClassesCache.add(type);
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62 }
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63 }
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64 }
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65 return definedClassesCache;
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66 }
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67
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68 private SystemDictionary getSystemDictionary() {
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69 return vm.saSystemDictionary();
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70 }
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71
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72 private Universe getUniverse() {
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73 return vm.saUniverse();
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74 }
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75
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76 public List visibleClasses() {
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77 if (visibleClassesCache != null)
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78 return visibleClassesCache;
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79
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80 visibleClassesCache = new ArrayList();
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81
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82 // refer to getClassLoaderClasses in jvmtiGetLoadedClasses.cpp
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83 // a. SystemDictionary::classes_do doesn't include arrays of primitive types (any dimensions)
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84 SystemDictionary sysDict = getSystemDictionary();
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85 sysDict.classesDo(
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86 new SystemDictionary.ClassAndLoaderVisitor() {
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87 public void visit(Klass k, Oop loader) {
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88 if (ref().equals(loader)) {
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89 for (Klass l = k; l != null; l = l.arrayKlassOrNull()) {
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90 visibleClassesCache.add(vm.referenceType(l));
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91 }
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92 }
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93 }
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94 }
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95 );
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96
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97 // b. multi dimensional arrays of primitive types
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98 sysDict.primArrayClassesDo(
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99 new SystemDictionary.ClassAndLoaderVisitor() {
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100 public void visit(Klass k, Oop loader) {
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101 if (ref().equals(loader)) {
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102 visibleClassesCache.add(vm.referenceType(k));
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103 }
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104 }
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105 }
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106 );
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107
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108 // c. single dimensional primitive array klasses from Universe
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109 // these are not added to SystemDictionary
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110 getUniverse().basicTypeClassesDo(
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111 new SystemDictionary.ClassVisitor() {
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112 public void visit(Klass k) {
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113 visibleClassesCache.add(vm.referenceType(k));
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114 }
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115 }
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116 );
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117
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118 return visibleClassesCache;
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119 }
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120
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121 Type findType(String signature) throws ClassNotLoadedException {
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122 List types = visibleClasses();
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123 Iterator iter = types.iterator();
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124 while (iter.hasNext()) {
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125 ReferenceType type = (ReferenceType)iter.next();
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126 if (type.signature().equals(signature)) {
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127 return type;
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128 }
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129 }
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130 JNITypeParser parser = new JNITypeParser(signature);
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131 throw new ClassNotLoadedException(parser.typeName(),
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132 "Class " + parser.typeName() + " not loaded");
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133 }
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134 }
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