Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/Dictionary.java @ 271:818a18cd69a8
6730514: assertion failure in mangling code when expanding by 0 bytes
Summary: An expansion by 0 bytes was not anticipated when the assertion was composed.
Reviewed-by: jjh, jcoomes, apetrusenko
author | jmasa |
---|---|
date | Wed, 30 Jul 2008 11:54:00 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * 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; } }