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comparison agent/src/share/classes/sun/jvm/hotspot/runtime/solaris_sparc/SolarisSPARCJavaThreadPDAccess.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 /*
2 * Copyright 2000-2006 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.solaris_sparc;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.debugger.sparc.*;
31 import sun.jvm.hotspot.runtime.*;
32 import sun.jvm.hotspot.runtime.sparc.*;
33 import sun.jvm.hotspot.types.*;
34 import sun.jvm.hotspot.utilities.*;
35
36 public class SolarisSPARCJavaThreadPDAccess implements JavaThreadPDAccess {
37 private static AddressField baseOfStackPointerField;
38 private static AddressField postJavaStateField;
39 private static AddressField osThreadField;
40 private static int isPC;
41 private static int hasFlushed;
42
43 // Field from OSThread
44 private static CIntegerField osThreadThreadIDField;
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("JavaThread");
56 Type anchorType = db.lookupType("JavaFrameAnchor");
57
58 baseOfStackPointerField = type.getAddressField("_base_of_stack_pointer");
59 osThreadField = type.getAddressField("_osthread");
60 hasFlushed = db.lookupIntConstant("JavaFrameAnchor::flushed").intValue();
61
62 type = db.lookupType("OSThread");
63 osThreadThreadIDField = type.getCIntegerField("_thread_id");
64 }
65
66 public Address getLastJavaFP(Address addr) {
67 return null;
68
69 }
70
71 public Address getLastJavaPC(Address addr) {
72 return null;
73 }
74
75 public Address getBaseOfStackPointer(Address addr) {
76 return baseOfStackPointerField.getValue(addr);
77 }
78
79 public Frame getLastFramePD(JavaThread thread, Address addr) {
80
81 // This assert doesn't work in the debugging case for threads
82 // which are running Java code and which haven't re-entered the
83 // runtime (e.g., through a Method.invoke() or otherwise). They
84 // haven't yet "decached" their last Java stack pointer to the
85 // thread.
86
87 // if (Assert.ASSERTS_ENABLED) {
88 // Assert.that(hasLastJavaFrame(), "must have last_Java_sp() when suspended");
89 // // FIXME: add assertion about flushing register windows for runtime system
90 // // (not appropriate for debugging system, though, unless at safepoin t)
91 // }
92
93 // FIXME: I don't think this is necessary, but might be useful
94 // while debugging
95 if (thread.getLastJavaSP() == null) {
96 return null;
97 }
98
99 // sparc does a lazy window flush. The _flags field of the JavaFrameAnchor
100 // encodes whether the windows have flushed. Whenever the windows have flushed
101 // there will be a last_Java_pc.
102 // In a relective system we'd have to do something to force the thread to flush
103 // its windows and give us the pc (or the younger_sp so we can find it ourselves)
104 // In a debugger situation (process or core) the flush should have happened and
105 // so if we don't have the younger sp we can find it
106 //
107 if (thread.getLastJavaPC() != null) {
108 return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()), thread.getLastJavaPC());
109 } else {
110 Frame top = getCurrentFrameGuess(thread, addr);
111 return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()),
112 SPARCFrame.biasSP(SPARCFrame.findYoungerSP(top.getSP(), thread.getLastJavaSP())),
113 false);
114 }
115
116
117 }
118
119 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) {
120 return new SPARCRegisterMap(thread, updateMap);
121 }
122
123 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) {
124 ThreadProxy t = getThreadProxy(addr);
125 SPARCThreadContext context = (SPARCThreadContext) t.getContext();
126 // For now, let's see what happens if we do a similar thing to
127 // what the runtime code does. I suspect this may cause us to lose
128 // the top frame from the stack.
129 Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
130 Address pc = context.getRegisterAsAddress(SPARCThreadContext.R_PC);
131
132 if ((sp == null) || (pc == null)) {
133 // Problems (have not hit this case so far, but would be bad to continue if we did)
134 return null;
135 }
136
137 return new SPARCFrame(sp, pc);
138 }
139
140
141 public void printThreadIDOn(Address addr, PrintStream tty) {
142 tty.print(getThreadProxy(addr));
143 }
144
145 public Address getLastSP(Address addr) {
146 ThreadProxy t = getThreadProxy(addr);
147 SPARCThreadContext context = (SPARCThreadContext) t.getContext();
148 return SPARCFrame.unBiasSP(context.getRegisterAsAddress(SPARCThreadContext.R_SP));
149 }
150
151 public void printInfoOn(Address threadAddr, PrintStream tty) {
152 }
153
154 public ThreadProxy getThreadProxy(Address addr) {
155 // Fetch the OSThread (for now and for simplicity, not making a
156 // separate "OSThread" class in this package)
157 Address osThreadAddr = osThreadField.getValue(addr);
158 // Get the address of the thread ID from the OSThread
159 Address tidAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset());
160
161 JVMDebugger debugger = VM.getVM().getDebugger();
162 return debugger.getThreadForIdentifierAddress(tidAddr);
163 }
164
165
166 }