1 /* 2 * Copyright (c) 2001, 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.oops; 26 27 import java.io.*; 28 import java.util.*; 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.interpreter.*; 31 import sun.jvm.hotspot.runtime.*; 32 import sun.jvm.hotspot.types.*; 33 import sun.jvm.hotspot.utilities.*; 34 35 public class LocalVariableTableElement { 36 static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } })37 VM.registerVMInitializedObserver(new Observer() { 38 public void update(Observable o, Object data) { 39 initialize(VM.getVM().getTypeDataBase()); 40 } 41 }); 42 } 43 initialize(TypeDataBase db)44 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 45 Type type = db.lookupType("LocalVariableTableElement"); 46 offsetOfStartBCI = type.getCIntegerField("start_bci").getOffset(); 47 offsetOfLength = type.getCIntegerField("length").getOffset(); 48 offsetOfNameCPIndex = type.getCIntegerField("name_cp_index").getOffset(); 49 offsetOfDescriptorCPIndex = type.getCIntegerField("descriptor_cp_index").getOffset(); 50 offsetOfSignatureCPIndex = type.getCIntegerField("signature_cp_index").getOffset(); 51 offsetOfSlot = type.getCIntegerField("slot").getOffset(); 52 } 53 54 private static long offsetOfStartBCI; 55 private static long offsetOfLength; 56 private static long offsetOfNameCPIndex; 57 private static long offsetOfDescriptorCPIndex; 58 private static long offsetOfSignatureCPIndex; 59 private static long offsetOfSlot; 60 61 private Address handle; 62 private long offset; 63 LocalVariableTableElement(Address handle, long offset)64 public LocalVariableTableElement(Address handle, long offset) { 65 this.handle = handle; 66 this.offset = offset; 67 } 68 getStartBCI()69 public int getStartBCI() { 70 return (int) handle.getCIntegerAt(offset + offsetOfStartBCI, 2, true); 71 } 72 getLength()73 public int getLength() { 74 return (int) handle.getCIntegerAt(offset + offsetOfLength, 2, true); 75 } 76 getNameCPIndex()77 public int getNameCPIndex() { 78 return (int) handle.getCIntegerAt(offset + offsetOfNameCPIndex, 2, true); 79 } 80 getDescriptorCPIndex()81 public int getDescriptorCPIndex() { 82 return (int) handle.getCIntegerAt(offset + offsetOfDescriptorCPIndex, 2, true); 83 } 84 getSignatureCPIndex()85 public int getSignatureCPIndex() { 86 return (int) handle.getCIntegerAt(offset + offsetOfSignatureCPIndex, 2, true); 87 } 88 getSlot()89 public int getSlot() { 90 return (int) handle.getCIntegerAt(offset + offsetOfSlot, 2, true); 91 } 92 } 93