Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/Hashtable.java @ 3945:8ed53447f690
Merge
author | iveresov |
---|---|
date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | 1d1603768966 |
children | d2a62e0f25eb |
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/* * Copyright (c) 2003, 2011, 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.utilities; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.runtime.*; public class Hashtable extends BasicHashtable { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { // just to confirm that type exists Type type = db.lookupType("Hashtable<intptr_t>"); } // derived class may return Class<? extends HashtableEntry> protected Class getHashtableEntryClass() { return HashtableEntry.class; } public int hashToIndex(long fullHash) { return (int) (fullHash % tableSize()); } public Hashtable(Address addr) { super(addr); } // VM's Hashtable::hash_symbol protected static long hashSymbol(byte[] buf) { long h = 0; int s = 0; int len = buf.length; while (len-- > 0) { h = 31*h + (0xFFL & buf[s]); s++; } return h & 0xFFFFFFFFL; } }