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comparison agent/src/share/classes/sun/jvm/hotspot/oops/LocalVariableTableElement.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2001-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any 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 {
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("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 OopHandle handle;
62 private long offset;
63
64 public LocalVariableTableElement(OopHandle handle, long offset) {
65 this.handle = handle;
66 this.offset = offset;
67 }
68
69 public int getStartBCI() {
70 return (int) handle.getCIntegerAt(offset + offsetOfStartBCI, 2, true);
71 }
72
73 public int getLength() {
74 return (int) handle.getCIntegerAt(offset + offsetOfLength, 2, true);
75 }
76
77 public int getNameCPIndex() {
78 return (int) handle.getCIntegerAt(offset + offsetOfNameCPIndex, 2, true);
79 }
80
81 public int getDescriptorCPIndex() {
82 return (int) handle.getCIntegerAt(offset + offsetOfDescriptorCPIndex, 2, true);
83 }
84
85 public int getSignatureCPIndex() {
86 return (int) handle.getCIntegerAt(offset + offsetOfSignatureCPIndex, 2, true);
87 }
88
89 public int getSlot() {
90 return (int) handle.getCIntegerAt(offset + offsetOfSlot, 2, true);
91 }
92 }