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comparison agent/src/share/classes/sun/jvm/hotspot/oops/MethodData.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 2000-2004 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.runtime.*;
31 import sun.jvm.hotspot.types.*;
32 import sun.jvm.hotspot.utilities.*;
33
34 // A MethodData provides interpreter profiling information
35
36 public class MethodData extends Oop {
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 Type type = db.lookupType("methodDataOopDesc");
47 baseOffset = type.getSize();
48
49 size = new CIntField(type.getCIntegerField("_size"), 0);
50 method = new OopField(type.getOopField("_method"), 0);
51 // FIXME: add more fields and accessors
52 }
53
54 MethodData(OopHandle handle, ObjectHeap heap) {
55 super(handle, heap);
56 }
57
58 public boolean isMethodData() { return true; }
59
60 private static long baseOffset;
61 private static CIntField size;
62 private static OopField method;
63
64 public long getObjectSize() {
65 return alignObjectSize(size.getValue(this));
66 }
67
68 public Method getMethod() {
69 return (Method) method.getValue(this);
70 }
71
72 public void printValueOn(PrintStream tty) {
73 Method m = getMethod();
74 tty.print("MethodData for " + m.getName().asString() + m.getSignature().asString());
75 }
76
77 public void iterateFields(OopVisitor visitor, boolean doVMFields) {
78 super.iterateFields(visitor, doVMFields);
79 if (doVMFields) {
80 visitor.doOop(method, true);
81 visitor.doCInt(size, true);
82 }
83 }
84 }