1 /* 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.utilities; 26 27 import java.util.Observable; 28 import java.util.Observer; 29 30 import sun.jvm.hotspot.debugger.Address; 31 import sun.jvm.hotspot.oops.Metadata; 32 import sun.jvm.hotspot.oops.Klass; 33 import sun.jvm.hotspot.runtime.VM; 34 import sun.jvm.hotspot.types.Type; 35 import sun.jvm.hotspot.types.TypeDataBase; 36 import sun.jvm.hotspot.types.WrongTypeException; 37 38 public class KlassArray extends GenericArray { 39 static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } })40 VM.registerVMInitializedObserver(new Observer() { 41 public void update(Observable o, Object data) { 42 initialize(VM.getVM().getTypeDataBase()); 43 } 44 }); 45 } 46 initialize(TypeDataBase db)47 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 48 elemType = db.lookupType("Klass*"); 49 50 Type type = db.lookupType("Array<Klass*>"); 51 dataFieldOffset = type.getAddressField("_data").getOffset(); 52 } 53 54 private static long dataFieldOffset; 55 protected static Type elemType; 56 KlassArray(Address addr)57 public KlassArray(Address addr) { 58 super(addr, dataFieldOffset); 59 } 60 getAt(int i)61 public Klass getAt(int i) { 62 return (Klass) Metadata.instantiateWrapperFor(getAddressAt(i)); 63 } 64 getElemType()65 public Type getElemType() { 66 return elemType; 67 } 68 } 69