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comparison agent/src/share/classes/sun/jvm/hotspot/debugger/win32/Win32Thread.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 2001-2004 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.debugger.win32;
26
27 import sun.jvm.hotspot.debugger.*;
28 import sun.jvm.hotspot.debugger.x86.*;
29
30 class Win32Thread implements ThreadProxy {
31 private Win32Debugger debugger;
32 private int handle;
33 private boolean mustDuplicate;
34 private boolean gotID;
35 private int id;
36
37 /** The address argument must be the address of the HANDLE of the
38 desired thread in the target process. */
39 Win32Thread(Win32Debugger debugger, Address addr) {
40 this.debugger = debugger;
41 // FIXME: size of data fetched here should be configurable.
42 // However, making it so would produce a dependency on the "types"
43 // package from the debugger package, which is not desired.
44 this.handle = (int) addr.getCIntegerAt(0, 4, true);
45 // Thread handles in the target process must be duplicated before
46 // fetching their contexts
47 mustDuplicate = true;
48 gotID = false;
49 }
50
51 /** The integer argument must be the value of a HANDLE received from
52 the "threadlist" operation. */
53 Win32Thread(Win32Debugger debugger, long handle) {
54 this.debugger = debugger;
55 this.handle = (int) handle;
56 mustDuplicate = false;
57 gotID = false;
58 }
59
60 public ThreadContext getContext() throws IllegalThreadStateException {
61 if (!debugger.isSuspended()) {
62 throw new IllegalThreadStateException("Target process must be suspended");
63 }
64 long[] data = debugger.getThreadIntegerRegisterSet(handle, mustDuplicate);
65 Win32ThreadContext context = new Win32ThreadContext(debugger);
66 for (int i = 0; i < data.length; i++) {
67 context.setRegister(i, data[i]);
68 }
69 return context;
70 }
71
72 public boolean canSetContext() throws DebuggerException {
73 return true;
74 }
75
76 public void setContext(ThreadContext thrCtx)
77 throws IllegalThreadStateException, DebuggerException {
78 if (!debugger.isSuspended()) {
79 throw new IllegalThreadStateException("Target process must be suspended");
80 }
81 X86ThreadContext context = (X86ThreadContext) thrCtx;
82 long[] data = new long[X86ThreadContext.NPRGREG];
83 for (int i = 0; i < data.length; i++) {
84 data[i] = context.getRegister(i);
85 }
86 debugger.setThreadIntegerRegisterSet(handle, mustDuplicate, data);
87 }
88
89 public boolean equals(Object obj) {
90 if ((obj == null) || !(obj instanceof Win32Thread)) {
91 return false;
92 }
93
94 return (((Win32Thread) obj).getThreadID() == getThreadID());
95 }
96
97 public int hashCode() {
98 return getThreadID();
99 }
100
101 public String toString() {
102 return Integer.toString(getThreadID());
103 }
104
105 /** Retrieves the thread ID of this thread by examining the Thread
106 Information Block. */
107 private int getThreadID() {
108 if (!gotID) {
109 try {
110 // Get thread context
111 X86ThreadContext context = (X86ThreadContext) getContext();
112 // Get LDT entry for FS register
113 Win32LDTEntry ldt =
114 debugger.getThreadSelectorEntry(handle,
115 mustDuplicate,
116 (int) context.getRegister(X86ThreadContext.FS));
117 // Get base address of segment = Thread Environment Block (TEB)
118 Address teb = debugger.newAddress(ldt.getBase());
119 // Thread ID is at offset 0x24
120 id = (int) teb.getCIntegerAt(0x24, 4, true);
121 gotID = true;
122 } catch (AddressException e) {
123 throw new DebuggerException(e);
124 }
125 }
126
127 return id;
128 }
129 }