Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/BasicHashtable.java @ 13705:ac5b0f31f7a2
Truffle API-change: FrameDescriptors are now stored in the RootNode in a final field instead of the CallTarget.
author | Christian Humer <christian.humer@gmail.com> |
---|---|
date | Fri, 17 Jan 2014 17:06:08 +0100 |
parents | b9a9ed0f8eeb |
children |
line wrap: on
line source
/* * 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.utilities; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.runtime.*; // Superclass for symbol and string tables. public class BasicHashtable extends VMObject { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("BasicHashtable<mtInternal>"); tableSizeField = type.getCIntegerField("_table_size"); bucketsField = type.getAddressField("_buckets"); bucketSize = db.lookupType("HashtableBucket<mtInternal>").getSize(); } // Fields private static CIntegerField tableSizeField; private static AddressField bucketsField; private static long bucketSize; // Accessors protected int tableSize() { return (int) tableSizeField.getValue(addr); } protected BasicHashtableEntry bucket(int i) { if (Assert.ASSERTS_ENABLED) { Assert.that(i >= 0 && i < tableSize(), "Invalid bucket id"); } Address tmp = bucketsField.getValue(addr); tmp = tmp.addOffsetTo(i * bucketSize); HashtableBucket bucket = (HashtableBucket) VMObjectFactory.newObject( HashtableBucket.class, tmp); return bucket.getEntry(getHashtableEntryClass()); } // derived class may return Class<? extends BasicHashtableEntry> protected Class getHashtableEntryClass() { return BasicHashtableEntry.class; } public BasicHashtable(Address addr) { super(addr); } }