Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/KlassArray.java @ 12704:0e998f0daddf
Code cache: make sure we collect statistics even if the compiler is not recognized
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 07 Nov 2013 11:17:23 +0100 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 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.Observable; import java.util.Observer; import sun.jvm.hotspot.debugger.Address; import sun.jvm.hotspot.oops.Metadata; import sun.jvm.hotspot.oops.Klass; import sun.jvm.hotspot.runtime.VM; import sun.jvm.hotspot.types.Type; import sun.jvm.hotspot.types.TypeDataBase; import sun.jvm.hotspot.types.WrongTypeException; public class KlassArray extends GenericArray { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { elemType = db.lookupType("Klass*"); Type type = db.lookupType("Array<Klass*>"); dataFieldOffset = type.getAddressField("_data").getOffset(); } private static long dataFieldOffset; protected static Type elemType; public KlassArray(Address addr) { super(addr, dataFieldOffset); } public Klass getAt(int i) { return (Klass) Metadata.instantiateWrapperFor(getAddressAt(i)); } public Type getElemType() { return elemType; } }