1 /* 2 * Copyright (c) 2003, 2013, 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.memory; 26 27 import java.util.*; 28 import sun.jvm.hotspot.classfile.ClassLoaderData; 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.oops.*; 31 import sun.jvm.hotspot.types.*; 32 import sun.jvm.hotspot.runtime.*; 33 import sun.jvm.hotspot.utilities.*; 34 35 public class DictionaryEntry extends sun.jvm.hotspot.utilities.HashtableEntry { 36 static { 37 VM.registerVMInitializedObserver(new Observer() { 38 public void update(Observable o, Object data) { 39 initialize(VM.getVM().getTypeDataBase()); 40 } 41 }); 42 } 43 44 private static synchronized void initialize(TypeDataBase db) { 45 Type type = db.lookupType("DictionaryEntry"); 46 pdSetField = type.getAddressField("_pd_set"); 47 loaderDataField = type.getAddressField("_loader_data"); 48 } 49 50 // Fields 51 private static AddressField pdSetField; 52 private static AddressField loaderDataField; 53 54 // Accessors 55 56 public ProtectionDomainEntry pdSet() { 57 Address tmp = pdSetField.getValue(addr); 58 return (ProtectionDomainEntry) VMObjectFactory.newObject( 59 ProtectionDomainEntry.class, tmp); 60 } 61 62 public Oop loader() { 63 return loaderData().getClassLoader(); 64 } 65 66 public ClassLoaderData loaderData() { 67 return ClassLoaderData.instantiateWrapperFor(loaderDataField.getValue(addr)); 68 } 69 70 public Klass klass() { 71 return (Klass)Metadata.instantiateWrapperFor(literalValue()); 72 } 73 74 public DictionaryEntry(Address addr) { 75 super(addr); 76 } 77 78 public boolean equals(Symbol className, Oop classLoader) { 79 InstanceKlass ik = (InstanceKlass) klass(); 80 Oop loader = loader(); 81 if (! ik.getName().equals(className)) { 82 return false; 83 } else { 84 return (loader == null)? (classLoader == null) : 85 (loader.equals(classLoader)); 86 } 87 } 88 89 public boolean isValidProtectionDomain(Oop protectionDomain) { 90 if (protectionDomain == null) { 91 return true; 92 } else { 93 return containsProtectionDomain(protectionDomain); 94 } 95 } 96 97 public boolean containsProtectionDomain(Oop protectionDomain) { 98 InstanceKlass ik = (InstanceKlass) klass(); 99 // Currently unimplemented and not used. 100 // if (protectionDomain.equals(ik.getJavaMirror().getProtectionDomain())) { 101 // return true; // Succeeds trivially 102 // } 103 for (ProtectionDomainEntry current = pdSet(); current != null; 104 current = current.next()) { 105 if (protectionDomain.equals(current.protectionDomain())) { 106 return true; 107 } 108 } 109 return false; 110 } 111 112 /* covariant return type :-( 113 public DictionaryEntry next() { 114 return (DictionaryEntry) super.next(); 115 } 116 For now, let the caller cast it .. 117 */ 118 }