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.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 ExceptionTableElement { 36 static { 37 VM.registerVMInitializedObserver(new Observer() { 38 public void update(Observable o, Object data) { 39 initialize(VM.getVM().getTypeDataBase()); 40 } 41 }); 42 } 43 44 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 45 Type type = db.lookupType("ExceptionTableElement"); 46 offsetOfStartPC = type.getCIntegerField("start_pc").getOffset(); 47 offsetOfEndPC = type.getCIntegerField("end_pc").getOffset(); 48 offsetOfHandlerPC = type.getCIntegerField("handler_pc").getOffset(); 49 offsetOfCatchTypeIndex = type.getCIntegerField("catch_type_index").getOffset(); 50 } 51 52 private static long offsetOfStartPC; 53 private static long offsetOfEndPC; 54 private static long offsetOfHandlerPC; 55 private static long offsetOfCatchTypeIndex; 56 57 private OopHandle handle; 58 private long offset; 59 60 public ExceptionTableElement(OopHandle handle, long offset) { 61 this.handle = handle; 62 this.offset = offset; 63 } 64 65 public int getStartPC() { 66 return (int) handle.getCIntegerAt(offset + offsetOfStartPC, 2, true); 67 } 68 69 public int getEndPC() { 70 return (int) handle.getCIntegerAt(offset + offsetOfEndPC, 2, true); 71 } 72 73 public int getHandlerPC() { 74 return (int) handle.getCIntegerAt(offset + offsetOfHandlerPC, 2, true); 75 } 76 77 public int getCatchTypeIndex() { 78 return (int) handle.getCIntegerAt(offset + offsetOfCatchTypeIndex, 2, true); 79 } 80 } 81