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comparison agent/src/share/classes/sun/jvm/hotspot/compiler/OopMap.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.compiler;
26
27 import java.util.*;
28
29 import sun.jvm.hotspot.code.*;
30 import sun.jvm.hotspot.debugger.*;
31 import sun.jvm.hotspot.runtime.*;
32 import sun.jvm.hotspot.types.*;
33
34 public class OopMap extends VMObject {
35 private static CIntegerField pcOffsetField;
36 private static CIntegerField omvCountField;
37 private static CIntegerField omvDataSizeField;
38 private static AddressField omvDataField;
39 private static AddressField compressedWriteStreamField;
40
41 // This is actually a field inside class CompressedStream
42 private static AddressField compressedStreamBufferField;
43
44 static {
45 VM.registerVMInitializedObserver(new Observer() {
46 public void update(Observable o, Object data) {
47 initialize(VM.getVM().getTypeDataBase());
48 }
49 });
50 }
51
52 private static void initialize(TypeDataBase db) {
53 Type type = db.lookupType("OopMap");
54
55 pcOffsetField = type.getCIntegerField("_pc_offset");
56 omvCountField = type.getCIntegerField("_omv_count");
57 omvDataSizeField = type.getCIntegerField("_omv_data_size");
58 omvDataField = type.getAddressField("_omv_data");
59 compressedWriteStreamField = type.getAddressField("_write_stream");
60
61 type = db.lookupType("CompressedStream");
62 compressedStreamBufferField = type.getAddressField("_buffer");
63 }
64
65 public OopMap(Address addr) {
66 super(addr);
67 }
68
69 public long getOffset() {
70 return pcOffsetField.getValue(addr);
71 }
72
73 //--------------------------------------------------------------------------------
74 // Internals only below this point
75 //
76
77 // Accessors -- package private for now
78 Address getOMVData() {
79 return omvDataField.getValue(addr);
80 }
81
82 long getOMVDataSize() {
83 return omvDataSizeField.getValue(addr);
84 }
85
86 long getOMVCount() {
87 return omvCountField.getValue(addr);
88 }
89
90 CompressedWriteStream getWriteStream() {
91 Address wsAddr = compressedWriteStreamField.getValue(addr);
92 if (wsAddr == null) {
93 return null;
94 }
95 Address bufferAddr = compressedStreamBufferField.getValue(wsAddr);
96 if (bufferAddr == null) {
97 return null;
98 }
99 return new CompressedWriteStream(bufferAddr);
100 }
101 }