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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 Address handle;
58    private long      offset;
59  
60    public ExceptionTableElement(Address 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  }