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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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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.interpreter;
26
27 import java.io.*;
28 import java.util.*;
29
30 import sun.jvm.hotspot.code.*;
31 import sun.jvm.hotspot.debugger.*;
32 import sun.jvm.hotspot.runtime.*;
33 import sun.jvm.hotspot.types.*;
34 import sun.jvm.hotspot.utilities.*;
35
36 /** An InterpreterCodelet is a piece of interpreter code. All
37 interpreter code is generated into little codelets which contain
38 extra information for debugging and printing purposes. */
39
40 public class InterpreterCodelet extends Stub {
41 private static long instanceSize;
42 private static CIntegerField sizeField; // the size in bytes
43 private static AddressField descriptionField; // a description of the codelet, for debugging & printing
44 private static CIntegerField bytecodeField; // associated bytecode if any
45
46 static {
47 VM.registerVMInitializedObserver(new Observer() {
48 public void update(Observable o, Object data) {
49 initialize(VM.getVM().getTypeDataBase());
50 }
51 });
52 }
53
54 private static synchronized void initialize(TypeDataBase db) {
55 Type type = db.lookupType("InterpreterCodelet");
56
57 sizeField = type.getCIntegerField("_size");
58 descriptionField = type.getAddressField("_description");
59 bytecodeField = type.getCIntegerField("_bytecode");
60
61 instanceSize = type.getSize();
62 }
63
64 public InterpreterCodelet(Address addr) {
65 super(addr);
66 }
67
68 public long getSize() {
69 return sizeField.getValue(addr);
70 }
71
72 public Address codeBegin() {
73 return addr.addOffsetTo(instanceSize);
74 }
75
76 public Address codeEnd() {
77 return addr.addOffsetTo(getSize());
78 }
79
80 public long codeSize() {
81 return codeEnd().minus(codeBegin());
82 }
83
84 public String getDescription() {
85 return CStringUtilities.getString(descriptionField.getValue(addr));
86 }
87
88 public void verify() {
89 }
90
91 public void printOn(PrintStream tty) {
92 String desc = getDescription();
93 if (desc != null) {
94 tty.print(desc);
95 }
96 // FIXME: add printing of bytecode
97 tty.println(" [" + codeBegin() + ", " + codeEnd() + ") " +
98 codeSize() + " bytes ");
99 // FIXME: add disassembly
100 }
101 }