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1 /*
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2 * Copyright 2001-2004 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.debugger.win32;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28 import sun.jvm.hotspot.debugger.x86.*;
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29
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30 class Win32Thread implements ThreadProxy {
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31 private Win32Debugger debugger;
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32 private int handle;
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33 private boolean mustDuplicate;
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34 private boolean gotID;
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35 private int id;
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36
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37 /** The address argument must be the address of the HANDLE of the
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38 desired thread in the target process. */
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39 Win32Thread(Win32Debugger debugger, Address addr) {
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40 this.debugger = debugger;
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41 // FIXME: size of data fetched here should be configurable.
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42 // However, making it so would produce a dependency on the "types"
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43 // package from the debugger package, which is not desired.
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44 this.handle = (int) addr.getCIntegerAt(0, 4, true);
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45 // Thread handles in the target process must be duplicated before
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46 // fetching their contexts
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47 mustDuplicate = true;
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48 gotID = false;
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49 }
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50
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51 /** The integer argument must be the value of a HANDLE received from
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52 the "threadlist" operation. */
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53 Win32Thread(Win32Debugger debugger, long handle) {
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54 this.debugger = debugger;
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55 this.handle = (int) handle;
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56 mustDuplicate = false;
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57 gotID = false;
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58 }
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59
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60 public ThreadContext getContext() throws IllegalThreadStateException {
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61 if (!debugger.isSuspended()) {
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62 throw new IllegalThreadStateException("Target process must be suspended");
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63 }
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64 long[] data = debugger.getThreadIntegerRegisterSet(handle, mustDuplicate);
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65 Win32ThreadContext context = new Win32ThreadContext(debugger);
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66 for (int i = 0; i < data.length; i++) {
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67 context.setRegister(i, data[i]);
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68 }
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69 return context;
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70 }
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71
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72 public boolean canSetContext() throws DebuggerException {
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73 return true;
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74 }
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75
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76 public void setContext(ThreadContext thrCtx)
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77 throws IllegalThreadStateException, DebuggerException {
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78 if (!debugger.isSuspended()) {
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79 throw new IllegalThreadStateException("Target process must be suspended");
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80 }
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81 X86ThreadContext context = (X86ThreadContext) thrCtx;
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82 long[] data = new long[X86ThreadContext.NPRGREG];
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83 for (int i = 0; i < data.length; i++) {
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84 data[i] = context.getRegister(i);
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85 }
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86 debugger.setThreadIntegerRegisterSet(handle, mustDuplicate, data);
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87 }
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88
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89 public boolean equals(Object obj) {
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90 if ((obj == null) || !(obj instanceof Win32Thread)) {
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91 return false;
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92 }
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93
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94 return (((Win32Thread) obj).getThreadID() == getThreadID());
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95 }
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96
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97 public int hashCode() {
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98 return getThreadID();
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99 }
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100
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101 public String toString() {
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102 return Integer.toString(getThreadID());
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103 }
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104
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105 /** Retrieves the thread ID of this thread by examining the Thread
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106 Information Block. */
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107 private int getThreadID() {
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108 if (!gotID) {
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109 try {
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110 // Get thread context
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111 X86ThreadContext context = (X86ThreadContext) getContext();
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112 // Get LDT entry for FS register
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113 Win32LDTEntry ldt =
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114 debugger.getThreadSelectorEntry(handle,
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115 mustDuplicate,
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116 (int) context.getRegister(X86ThreadContext.FS));
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117 // Get base address of segment = Thread Environment Block (TEB)
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118 Address teb = debugger.newAddress(ldt.getBase());
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119 // Thread ID is at offset 0x24
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120 id = (int) teb.getCIntegerAt(0x24, 4, true);
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121 gotID = true;
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122 } catch (AddressException e) {
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123 throw new DebuggerException(e);
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124 }
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125 }
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126
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127 return id;
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128 }
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129 }
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