| /* |
| * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.memory; |
| |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| public class Dictionary extends TwoOopHashtable { |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) { |
| // just checking that the type exists |
| Type type = db.lookupType("Dictionary"); |
| } |
| |
| public Dictionary(Address addr) { |
| super(addr); |
| } |
| |
| // this is overriden here so that Hashtable.bucket will return |
| // object of DictionaryEntry.class |
| protected Class getHashtableEntryClass() { |
| return DictionaryEntry.class; |
| } |
| |
| /** Iterate over all klasses in dictionary; just the classes from |
| declaring class loaders */ |
| public void classesDo(SystemDictionary.ClassVisitor v) { |
| ObjectHeap heap = VM.getVM().getObjectHeap(); |
| int tblSize = tableSize(); |
| for (int index = 0; index < tblSize; index++) { |
| for (DictionaryEntry probe = (DictionaryEntry) bucket(index); probe != null; |
| probe = (DictionaryEntry) probe.next()) { |
| Klass k = probe.klass(); |
| if (heap.equal(probe.loader(), ((InstanceKlass) k).getClassLoader())) { |
| v.visit(k); |
| } |
| } |
| } |
| } |
| |
| /** All classes, and their class loaders */ |
| public void classesDo(SystemDictionary.ClassAndLoaderVisitor v) { |
| int tblSize = tableSize(); |
| for (int index = 0; index < tblSize; index++) { |
| for (DictionaryEntry probe = (DictionaryEntry) bucket(index); probe != null; |
| probe = (DictionaryEntry) probe.next()) { |
| Klass k = probe.klass(); |
| v.visit(k, probe.loader()); |
| } |
| } |
| } |
| |
| public Klass find(int index, long hash, Symbol className, Oop classLoader, Oop protectionDomain) { |
| DictionaryEntry entry = getEntry(index, hash, className, classLoader); |
| if (entry != null && entry.isValidProtectionDomain(protectionDomain)) { |
| return entry.klass(); |
| } |
| return null; |
| } |
| |
| // - Internals only below this point |
| |
| private DictionaryEntry getEntry(int index, long hash, Symbol className, Oop classLoader) { |
| for (DictionaryEntry entry = (DictionaryEntry) bucket(index); entry != null; |
| entry = (DictionaryEntry) entry.next()) { |
| if (entry.hash() == hash && entry.equals(className, classLoader)) { |
| return entry; |
| } |
| } |
| return null; |
| } |
| } |