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comparison agent/src/share/classes/sun/jvm/hotspot/runtime/win32_amd64/Win32AMD64JavaThreadPDAccess.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 2005 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.runtime.win32_amd64;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.debugger.win32.*;
31 import sun.jvm.hotspot.debugger.amd64.*;
32 import sun.jvm.hotspot.runtime.*;
33 import sun.jvm.hotspot.runtime.amd64.*;
34 import sun.jvm.hotspot.types.*;
35 import sun.jvm.hotspot.utilities.*;
36
37 /** This class is only public to allow using the VMObjectFactory to
38 instantiate these.
39 */
40
41 public class Win32AMD64JavaThreadPDAccess implements JavaThreadPDAccess {
42 private static AddressField lastJavaFPField;
43 private static AddressField osThreadField;
44
45 // Field from OSThread
46 private static Field osThreadThreadHandleField;
47
48 // This is currently unneeded but is being kept in case we change
49 // the currentFrameGuess algorithm
50 private static final long GUESS_SCAN_RANGE = 128 * 1024;
51
52 static {
53 VM.registerVMInitializedObserver(new Observer() {
54 public void update(Observable o, Object data) {
55 initialize(VM.getVM().getTypeDataBase());
56 }
57 });
58 }
59
60 private static synchronized void initialize(TypeDataBase db) {
61 Type type = db.lookupType("JavaThread");
62 Type anchorType = db.lookupType("JavaFrameAnchor");
63 lastJavaFPField = anchorType.getAddressField("_last_Java_fp");
64 osThreadField = type.getAddressField("_osthread");
65
66 type = db.lookupType("OSThread");
67 osThreadThreadHandleField = type.getField("_thread_handle");
68 }
69
70 public Address getLastJavaFP(Address addr) {
71 return lastJavaFPField.getValue(addr.addOffsetTo(sun.jvm.hotspot.runtime.JavaThread.getAnchorField().getOffset()));
72 }
73
74 public Address getLastJavaPC(Address addr) {
75 return null;
76 }
77
78 public Address getBaseOfStackPointer(Address addr) {
79 return null;
80 }
81
82 public Frame getLastFramePD(JavaThread thread, Address addr) {
83 Address fp = thread.getLastJavaFP();
84 if (fp == null) {
85 return null; // no information
86 }
87 Address pc = thread.getLastJavaPC();
88 if ( pc != null ) {
89 return new AMD64Frame(thread.getLastJavaSP(), fp, pc);
90 } else {
91 return new AMD64Frame(thread.getLastJavaSP(), fp);
92 }
93 }
94
95 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) {
96 return new AMD64RegisterMap(thread, updateMap);
97 }
98
99 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) {
100 ThreadProxy t = getThreadProxy(addr);
101 AMD64ThreadContext context = (AMD64ThreadContext) t.getContext();
102 AMD64CurrentFrameGuess guesser = new AMD64CurrentFrameGuess(context, thread);
103 if (!guesser.run(GUESS_SCAN_RANGE)) {
104 return null;
105 }
106 if (guesser.getPC() == null) {
107 return new AMD64Frame(guesser.getSP(), guesser.getFP());
108 } else {
109 return new AMD64Frame(guesser.getSP(), guesser.getFP(), guesser.getPC());
110 }
111 }
112
113 public void printThreadIDOn(Address addr, PrintStream tty) {
114 tty.print(getThreadProxy(addr));
115 }
116
117 public void printInfoOn(Address threadAddr, PrintStream tty) {
118 }
119
120 public Address getLastSP(Address addr) {
121 ThreadProxy t = getThreadProxy(addr);
122 AMD64ThreadContext context = (AMD64ThreadContext) t.getContext();
123 return context.getRegisterAsAddress(AMD64ThreadContext.RSP);
124 }
125
126 public ThreadProxy getThreadProxy(Address addr) {
127 // Addr is the address of the JavaThread.
128 // Fetch the OSThread (for now and for simplicity, not making a
129 // separate "OSThread" class in this package)
130 Address osThreadAddr = osThreadField.getValue(addr);
131 // Get the address of the HANDLE within the OSThread
132 Address threadHandleAddr =
133 osThreadAddr.addOffsetTo(osThreadThreadHandleField.getOffset());
134 JVMDebugger debugger = VM.getVM().getDebugger();
135 return debugger.getThreadForIdentifierAddress(threadHandleAddr);
136 }
137 }