0
|
1 /*
|
|
2 * Copyright 2006-2007 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.linux_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 LinuxSPARCJavaThreadPDAccess 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 osThreadField = type.getAddressField("_osthread");
|
|
59 hasFlushed = db.lookupIntConstant("JavaFrameAnchor::flushed").intValue();
|
|
60
|
|
61 type = db.lookupType("OSThread");
|
|
62 osThreadThreadIDField = type.getCIntegerField("_thread_id");
|
|
63 }
|
|
64
|
|
65 public Address getLastJavaFP(Address addr) {
|
|
66 return null;
|
|
67
|
|
68 }
|
|
69
|
|
70 public Address getLastJavaPC(Address addr) {
|
|
71 return null;
|
|
72 }
|
|
73
|
|
74 public Address getBaseOfStackPointer(Address addr) {
|
|
75 return baseOfStackPointerField.getValue(addr);
|
|
76 }
|
|
77
|
|
78 public Frame getLastFramePD(JavaThread thread, Address addr) {
|
|
79
|
|
80 // This assert doesn't work in the debugging case for threads
|
|
81 // which are running Java code and which haven't re-entered the
|
|
82 // runtime (e.g., through a Method.invoke() or otherwise). They
|
|
83 // haven't yet "decached" their last Java stack pointer to the
|
|
84 // thread.
|
|
85
|
|
86 // if (Assert.ASSERTS_ENABLED) {
|
|
87 // Assert.that(hasLastJavaFrame(), "must have last_Java_sp() when suspended");
|
|
88 // // FIXME: add assertion about flushing register windows for runtime system
|
|
89 // // (not appropriate for debugging system, though, unless at safepoin t)
|
|
90 // }
|
|
91
|
|
92 // FIXME: I don't think this is necessary, but might be useful
|
|
93 // while debugging
|
|
94 if (thread.getLastJavaSP() == null) {
|
|
95 return null;
|
|
96 }
|
|
97
|
|
98 // sparc does a lazy window flush. The _flags field of the JavaFrameAnchor
|
|
99 // encodes whether the windows have flushed. Whenever the windows have flushed
|
|
100 // there will be a last_Java_pc.
|
|
101 // In a relective system we'd have to do something to force the thread to flush
|
|
102 // its windows and give us the pc (or the younger_sp so we can find it ourselves)
|
|
103 // In a debugger situation (process or core) the flush should have happened and
|
|
104 // so if we don't have the younger sp we can find it
|
|
105 //
|
|
106 if (thread.getLastJavaPC() != null) {
|
|
107 return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()), thread.getLastJavaPC());
|
|
108 } else {
|
|
109 Frame top = getCurrentFrameGuess(thread, addr);
|
|
110 return new SPARCFrame(SPARCFrame.biasSP(thread.getLastJavaSP()),
|
|
111 SPARCFrame.biasSP(SPARCFrame.findYoungerSP(top.getSP(), thread.getLastJavaSP())),
|
|
112 false);
|
|
113 }
|
|
114
|
|
115
|
|
116 }
|
|
117
|
|
118 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) {
|
|
119 return new SPARCRegisterMap(thread, updateMap);
|
|
120 }
|
|
121
|
|
122 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) {
|
|
123 ThreadProxy t = getThreadProxy(addr);
|
|
124 SPARCThreadContext context = (SPARCThreadContext) t.getContext();
|
|
125 // For now, let's see what happens if we do a similar thing to
|
|
126 // what the runtime code does. I suspect this may cause us to lose
|
|
127 // the top frame from the stack.
|
|
128 Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
|
|
129 Address pc = context.getRegisterAsAddress(SPARCThreadContext.R_PC);
|
|
130
|
|
131 if ((sp == null) || (pc == null)) {
|
|
132 // Problems (have not hit this case so far, but would be bad to continue if we did)
|
|
133 return null;
|
|
134 }
|
|
135
|
|
136 return new SPARCFrame(sp, pc);
|
|
137 }
|
|
138
|
|
139
|
|
140 public void printThreadIDOn(Address addr, PrintStream tty) {
|
|
141 tty.print(getThreadProxy(addr));
|
|
142 }
|
|
143
|
|
144 public Address getLastSP(Address addr) {
|
|
145 ThreadProxy t = getThreadProxy(addr);
|
|
146 SPARCThreadContext context = (SPARCThreadContext) t.getContext();
|
|
147 return SPARCFrame.unBiasSP(context.getRegisterAsAddress(SPARCThreadContext.R_SP));
|
|
148 }
|
|
149
|
|
150 public void printInfoOn(Address threadAddr, PrintStream tty) {
|
|
151 }
|
|
152
|
|
153 public ThreadProxy getThreadProxy(Address addr) {
|
|
154 // Fetch the OSThread (for now and for simplicity, not making a
|
|
155 // separate "OSThread" class in this package)
|
|
156 Address osThreadAddr = osThreadField.getValue(addr);
|
|
157 // Get the address of the thread ID from the OSThread
|
|
158 Address tidAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset());
|
|
159
|
|
160 JVMDebugger debugger = VM.getVM().getDebugger();
|
|
161 return debugger.getThreadForIdentifierAddress(tidAddr);
|
|
162 }
|
|
163
|
|
164
|
|
165 }
|