Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/memory/Dictionary.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/memory/Dictionary.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,108 @@ +/* + * Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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()) { + Oop k = probe.klass(); + if (k.isKlass() && + heap.equal(probe.loader(), ((InstanceKlass) k).getClassLoader())) { + v.visit((Klass) 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()) { + Oop k = probe.klass(); + if (k.isKlass()) { + v.visit((Klass) 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; + } +}