Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/interpreter/InterpreterCodelet.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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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 } |