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1 /*
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2 * Copyright 2000-2004 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.ui;
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26
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27 import java.awt.BorderLayout;
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28 import java.awt.Dimension;
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29
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30 import java.awt.event.*;
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31
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32 import java.io.*;
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33 import java.util.*;
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34
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35 import javax.swing.*;
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36 import javax.swing.event.ListSelectionEvent;
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37 import javax.swing.event.ListSelectionListener;
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38 import javax.swing.table.*;
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39
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40 import sun.jvm.hotspot.debugger.*;
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41 import sun.jvm.hotspot.runtime.*;
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42
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43 import sun.jvm.hotspot.ui.action.*;
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44
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45 import com.sun.java.swing.ui.*;
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46 import com.sun.java.swing.action.*;
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47
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48 /**
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49 * This panel contains a JTable which displays the list of Java
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50 * threads as their native thread identifiers combined with their
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51 * Java names. It allows selection and examination of any of the
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52 * threads.
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53 */
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54 public class JavaThreadsPanel extends SAPanel implements ActionListener {
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55 private JavaThreadsTableModel dataModel;
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56 private StatusBar statusBar;
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57 private JTable threadTable;
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58 private java.util.List cachedThreads = new ArrayList();
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59
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60
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61 /** Constructor assumes the threads panel is created while the VM is
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62 suspended. Subsequent resume and suspend operations of the VM
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63 will cause the threads panel to clear and fill itself back in,
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64 respectively. */
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65 public JavaThreadsPanel() {
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66 VM.getVM().registerVMResumedObserver(new Observer() {
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67 public void update(Observable o, Object data) {
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68 decache();
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69 }
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70 });
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71
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72 VM.getVM().registerVMSuspendedObserver(new Observer() {
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73 public void update(Observable o, Object data) {
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74 cache();
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75 }
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76 });
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77
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78 cache();
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79
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80 setLayout(new BorderLayout());
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81
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82 dataModel = new JavaThreadsTableModel(cachedThreads);
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83 statusBar = new StatusBar();
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84
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85 threadTable = new JTable(dataModel, new JavaThreadsColumnModel());
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86 threadTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
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87 threadTable.addMouseListener(new MouseAdapter() {
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88 public void mouseClicked(MouseEvent evt) {
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89 if (evt.getClickCount() == 2) {
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90 // double clicking will display the oop inspector.
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91 fireShowThreadOopInspector();
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92 }
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93 }
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94 });
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95
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96 add(new JavaThreadsToolBar(statusBar), BorderLayout.NORTH);
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97 add(new ThreadPanel(threadTable), BorderLayout.CENTER);
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98 add(statusBar, BorderLayout.SOUTH);
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99
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100 registerActions();
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101 }
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102
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103 /**
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104 * A splitpane panel which contains the thread table and the Thread Info.
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105 * the thread info is toggleable
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106 */
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107 private class ThreadPanel extends JPanel {
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108
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109 private JSplitPane splitPane;
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110 private JTable threadTable;
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111 private ThreadInfoPanel threadInfo;
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112 private int dividerSize;
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113 private int dividerLocation = -1;
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114 private boolean actionsEnabled = false;
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115
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116 public ThreadPanel(JTable table) {
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117 setLayout(new BorderLayout());
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118 this.threadInfo = new ThreadInfoPanel();
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119 this.threadTable = table;
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120
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121 splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
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122 splitPane.setOneTouchExpandable(true);
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123 splitPane.setTopComponent(new JScrollPane(table));
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124
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125 // Set the size of the divider to 0 but save it so it can be restored
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126 dividerSize = splitPane.getDividerSize();
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127 splitPane.setDividerSize(0);
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128
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129 add(splitPane, BorderLayout.CENTER);
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130
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131 // Register an ItemListener on the LogViewerAction which toggles
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132 // the apearance of the ThreadInfoPanel
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133 ActionManager manager = HSDBActionManager.getInstance();
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134 StateChangeAction action = manager.getStateChangeAction(ThreadInfoAction.VALUE_COMMAND);
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135 if (action != null) {
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136 action.setItemListener(new ItemListener() {
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137 public void itemStateChanged(ItemEvent evt) {
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138 if (evt.getStateChange() == ItemEvent.SELECTED) {
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139 showOutputPane();
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140 } else {
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141 hideOutputPane();
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142 }
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143 }
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144 });
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145 }
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146
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147 // A listener is added to listen to changes in row selection
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148 // and changes the contents of the ThreadInfoPanel.
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149 ListSelectionModel selModel = table.getSelectionModel();
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150 selModel.addListSelectionListener(new ListSelectionListener() {
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151 public void valueChanged(ListSelectionEvent evt) {
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152 if (evt.getValueIsAdjusting() == false) {
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153 setActionsEnabled(true);
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154 if (isInfoVisible()) {
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155 showCurrentThreadInfo();
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156 }
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157 }
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158 }
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159 });
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160 }
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161
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162 /**
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163 * Returns a flag to indicate if the thread info is visible
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164 */
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165 private boolean isInfoVisible() {
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166 return (splitPane.getBottomComponent() != null);
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167 }
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168
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169 private void showOutputPane() {
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170 if (splitPane.getBottomComponent() == null) {
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171 splitPane.setBottomComponent(threadInfo);
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172
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173 if (dividerLocation == -1) {
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174 // Calculate the divider location from the pref size.
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175 Dimension pSize = this.getSize();
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176 dividerLocation = pSize.height / 2;
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177 }
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178
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179 splitPane.setDividerSize(dividerSize);
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180 splitPane.setDividerLocation(dividerLocation);
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181 showCurrentThreadInfo();
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182 }
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183 }
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184
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185 private void hideOutputPane() {
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186 dividerLocation = splitPane.getDividerLocation();
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187 splitPane.remove(threadInfo);
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188 splitPane.setDividerSize(0);
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189 }
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190
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191 private void showCurrentThreadInfo() {
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192 int row = threadTable.getSelectedRow();
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193 if (row >= 0) {
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194 threadInfo.setJavaThread(dataModel.getJavaThread(row));
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195 }
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196 }
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197
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198 private void setActionsEnabled(boolean enabled) {
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199 if (actionsEnabled != enabled) {
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200 ActionManager manager = ActionManager.getInstance();
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201 manager.setActionEnabled(InspectAction.VALUE_COMMAND, enabled);
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202 manager.setActionEnabled(MemoryAction.VALUE_COMMAND, enabled);
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203 manager.setActionEnabled(JavaStackTraceAction.VALUE_COMMAND, enabled);
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204 actionsEnabled = enabled;
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205 }
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206 }
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207
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208 } // end ThreadPanel
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209
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210 private class JavaThreadsToolBar extends CommonToolBar {
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211 public JavaThreadsToolBar(StatusBar status) {
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212 super(HSDBActionManager.getInstance(), status);
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213 }
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214
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215 protected void addComponents() {
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216 addButton(manager.getAction(InspectAction.VALUE_COMMAND));
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217 addButton(manager.getAction(MemoryAction.VALUE_COMMAND));
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218 addButton(manager.getAction(JavaStackTraceAction.VALUE_COMMAND));
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219
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220 addToggleButton(manager.getStateChangeAction(ThreadInfoAction.VALUE_COMMAND));
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221 addButton(manager.getAction(FindCrashesAction.VALUE_COMMAND));
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222 }
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223 }
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224
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225 private class JavaThreadsColumnModel extends DefaultTableColumnModel {
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226 private String[] columnNames = { "OS Thread ID", "Java Thread Name" };
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227
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228 public JavaThreadsColumnModel() {
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229 // Should actually get the line metrics for
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230 int PREF_WIDTH = 80;
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231 int MAX_WIDTH = 100;
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232 int HUGE_WIDTH = 140;
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233
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234 TableColumn column;
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235
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236 // Thread ID
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237 column = new TableColumn(0, MAX_WIDTH);
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238 column.setHeaderValue(columnNames[0]);
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239 column.setMaxWidth(MAX_WIDTH);
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240 column.setResizable(false);
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241 addColumn(column);
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242
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243 // Thread name
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244 column = new TableColumn(1, HUGE_WIDTH);
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245 column.setHeaderValue(columnNames[1]);
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246 column.setResizable(false);
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247 addColumn(column);
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248 }
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249 } // end class JavaThreadsColumnModel
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250
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251 /**
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252 * Encapsulates the set of threads in a table model
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253 */
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254 private class JavaThreadsTableModel extends AbstractTableModel {
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255 private String[] columnNames = { "OS Thread ID", "Java Thread Name" };
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256
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257 private java.util.List elements;
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258
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259 public JavaThreadsTableModel(java.util.List threads) {
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260 this.elements = threads;
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261 }
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262
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263 public int getColumnCount() {
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264 return columnNames.length;
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265 }
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266
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267 public int getRowCount() {
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268 return elements.size();
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269 }
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270
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271 public String getColumnName(int col) {
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272 return columnNames[col];
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273 }
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274
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275 public Object getValueAt(int row, int col) {
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276 CachedThread thread = getRow(row);
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277 switch (col) {
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278 case 0:
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279 return thread.getThreadID();
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280 case 1:
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281 return thread.getThreadName();
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282 default:
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283 throw new RuntimeException("Index (" + col + ", " + row + ") out of bounds");
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284 }
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285 }
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286
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287 /**
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288 * Returns the selected Java Thread indexed by the row or null.
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289 */
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290 public JavaThread getJavaThread(int index) {
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291 return getRow(index).getThread();
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292 }
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293
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294 private CachedThread getRow(int row) {
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295 return (CachedThread)elements.get(row);
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296 }
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297
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298 private String threadIDAt(int index) {
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299 return ((CachedThread) cachedThreads.get(index)).getThreadID();
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300 }
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301
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302 private String threadNameAt(int index) {
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303 try {
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304 return ((CachedThread) cachedThreads.get(index)).getThreadName();
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305 } catch (AddressException e) {
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306 return "<Error: AddressException>";
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307 } catch (NullPointerException e) {
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308 return "<Error: NullPointerException>";
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309 }
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310 }
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311 } // end class JavaThreadsTableModel
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312
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313 public void actionPerformed(ActionEvent evt) {
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314 String command = evt.getActionCommand();
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315
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316 if (command.equals(InspectAction.VALUE_COMMAND)) {
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317 fireShowThreadOopInspector();
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318 } else if (command.equals(MemoryAction.VALUE_COMMAND)) {
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319 fireShowThreadStackMemory();
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320 } else if (command.equals(ThreadInfoAction.VALUE_COMMAND)) {
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321 fireShowThreadInfo();
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322 } else if (command.equals(FindCrashesAction.VALUE_COMMAND)) {
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323 if (fireShowThreadCrashes()) {
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324 statusBar.setMessage("Some thread crashes were encountered");
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325 } else {
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326 statusBar.setMessage("No thread crashes encountered");
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327 }
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328 } else if (command.equals(JavaStackTraceAction.VALUE_COMMAND)) {
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329 fireShowJavaStackTrace();
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330 }
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331 }
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332
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333 // Cached data for a thread
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334 private class CachedThread {
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335 private JavaThread thread;
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336 private String threadID;
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337 private String threadName;
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338 private boolean computed;
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339
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340 public CachedThread(JavaThread thread) {
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341 this.thread = thread;
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342 }
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343
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344 public JavaThread getThread() {
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345 return thread;
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346 }
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347
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348 public String getThreadID() {
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349 if (!computed) {
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350 compute();
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351 }
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352
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353 return threadID;
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354 }
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355
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356 public String getThreadName() {
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357 if (!computed) {
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358 compute();
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359 }
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360
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361 return threadName;
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362 }
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363
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364 private void compute() {
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365 ByteArrayOutputStream bos = new ByteArrayOutputStream();
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366 thread.printThreadIDOn(new PrintStream(bos));
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367 threadID = bos.toString();
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368 threadName = thread.getThreadName();
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369
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370 computed = true;
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371 }
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372 }
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373
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374 //--------------------------------------------------------------------------------
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375 // Internals only below this point
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376 //
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377
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378 protected void registerActions() {
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379 registerAction(InspectAction.VALUE_COMMAND);
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380 registerAction(MemoryAction.VALUE_COMMAND);
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381 registerAction(FindCrashesAction.VALUE_COMMAND);
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382 registerAction(JavaStackTraceAction.VALUE_COMMAND);
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383
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384 // disable Inspector, Memory and Java Stack trace action until a thread is selected
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385 ActionManager manager = ActionManager.getInstance();
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386 manager.setActionEnabled(InspectAction.VALUE_COMMAND, false);
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387 manager.setActionEnabled(MemoryAction.VALUE_COMMAND, false);
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388 manager.setActionEnabled(JavaStackTraceAction.VALUE_COMMAND, false);
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389 }
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390
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391 private void registerAction(String actionName) {
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392 ActionManager manager = ActionManager.getInstance();
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393 DelegateAction action = manager.getDelegateAction(actionName);
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394 action.addActionListener(this);
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395 }
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396
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397
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398
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399 private void fireShowThreadOopInspector() {
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400 int i = threadTable.getSelectedRow();
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401 if (i < 0) {
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402 return;
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403 }
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404
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405 JavaThread t = dataModel.getJavaThread(i);
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406 showThreadOopInspector(t);
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407 }
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408
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409 private void fireShowThreadStackMemory() {
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410 int i = threadTable.getSelectedRow();
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411 if (i < 0) {
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412 return;
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413 }
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414 showThreadStackMemory(dataModel.getJavaThread(i));
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415 }
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416
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417 private void fireShowJavaStackTrace() {
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418 int i = threadTable.getSelectedRow();
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419 if (i < 0) {
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420 return;
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421 }
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422 showJavaStackTrace(dataModel.getJavaThread(i));
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423 }
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424
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425 private void fireShowThreadInfo() {
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426 int i = threadTable.getSelectedRow();
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427 if (i < 0) {
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428 return;
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429 }
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430 showThreadInfo(dataModel.getJavaThread(i));
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431 }
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432
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433 /**
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434 * Shows stack memory for threads which have crashed (defined as
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435 * having taken a signal above a Java frame)
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436 *
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437 * @return a flag which indicates if crashes were encountered.
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438 */
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439 private boolean fireShowThreadCrashes() {
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440 boolean crash = false;
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441 for (Iterator iter = cachedThreads.iterator(); iter.hasNext(); ) {
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442 JavaThread t = (JavaThread) ((CachedThread) iter.next()).getThread();
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443 sun.jvm.hotspot.runtime.Frame tmpFrame = t.getCurrentFrameGuess();
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444 RegisterMap tmpMap = t.newRegisterMap(false);
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445 while ((tmpFrame != null) && (!tmpFrame.isFirstFrame())) {
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446 if (tmpFrame.isSignalHandlerFrameDbg()) {
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447 showThreadStackMemory(t);
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448 crash = true;
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449 break;
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450 }
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451 tmpFrame = tmpFrame.sender(tmpMap);
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452 }
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453 }
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454 return crash;
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455 }
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456
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457 private void cache() {
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458 Threads threads = VM.getVM().getThreads();
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459 for (JavaThread t = threads.first(); t != null; t = t.next()) {
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460 if (t.isJavaThread()) {
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461 cachedThreads.add(new CachedThread(t));
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462 }
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463 }
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464 }
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465
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466 private void decache() {
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467 cachedThreads.clear();
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468 }
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469
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470 }
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