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 25package sun.jvm.hotspot.utilities; 26 27import java.util.Observable; 28import java.util.Observer; 29 30import sun.jvm.hotspot.debugger.Address; 31import sun.jvm.hotspot.runtime.VM; 32import sun.jvm.hotspot.types.Type; 33import sun.jvm.hotspot.types.TypeDataBase; 34import sun.jvm.hotspot.types.WrongTypeException; 35 36public class U1Array extends GenericArray { 37 static { 38 VM.registerVMInitializedObserver(new Observer() { 39 public void update(Observable o, Object data) { 40 initialize(VM.getVM().getTypeDataBase()); 41 } 42 }); 43 } 44 45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 46 elemType = db.lookupType("u1"); 47 48 Type type = db.lookupType("Array<u1>"); 49 dataFieldOffset = type.getAddressField("_data").getOffset(); 50 } 51 52 private static long dataFieldOffset; 53 protected static Type elemType; 54 55 public U1Array(Address addr) { 56 super(addr, dataFieldOffset); 57 } 58 59 public byte at(int i) { 60 return (byte)getIntegerAt(i); 61 } 62 63 public Type getElemType() { 64 return elemType; 65 } 66} 67