Mercurial > hg > truffle
annotate test/runtime/7158988/FieldMonitor.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | 19e197e2a1af |
children | a7f9a1195d86 |
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1 /* |
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2 * Copyright 2012 SAP AG. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test FieldMonitor.java |
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26 * @bug 7158988 |
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27 * @summary verify jvm does not crash while debugging |
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28 * @run shell TestFieldMonitor.sh |
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29 * @author axel.siebenborn@sap.com |
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30 */ |
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31 import java.io.BufferedReader; |
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32 import java.io.IOException; |
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33 import java.io.InputStream; |
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34 import java.io.InputStreamReader; |
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35 import java.io.OutputStream; |
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36 import java.io.OutputStreamWriter; |
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37 import java.io.Reader; |
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38 import java.io.Writer; |
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39 import java.util.Iterator; |
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40 import java.util.List; |
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41 import java.util.Map; |
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42 |
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43 import com.sun.jdi.Bootstrap; |
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44 import com.sun.jdi.Field; |
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45 import com.sun.jdi.ReferenceType; |
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46 import com.sun.jdi.VirtualMachine; |
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47 import com.sun.jdi.connect.Connector; |
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48 import com.sun.jdi.connect.IllegalConnectorArgumentsException; |
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49 import com.sun.jdi.connect.LaunchingConnector; |
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50 import com.sun.jdi.connect.VMStartException; |
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51 import com.sun.jdi.event.ClassPrepareEvent; |
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52 import com.sun.jdi.event.Event; |
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53 import com.sun.jdi.event.EventQueue; |
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54 import com.sun.jdi.event.EventSet; |
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55 import com.sun.jdi.event.ModificationWatchpointEvent; |
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56 import com.sun.jdi.event.VMDeathEvent; |
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57 import com.sun.jdi.event.VMDisconnectEvent; |
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58 import com.sun.jdi.request.ClassPrepareRequest; |
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59 import com.sun.jdi.request.EventRequest; |
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60 import com.sun.jdi.request.EventRequestManager; |
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61 import com.sun.jdi.request.ModificationWatchpointRequest; |
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62 |
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63 public class FieldMonitor { |
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64 |
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65 public static final String CLASS_NAME = "TestPostFieldModification"; |
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66 public static final String FIELD_NAME = "value"; |
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67 public static final String ARGUMENTS = "-Xshare:off -XX:+PrintGC"; |
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68 |
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69 public static void main(String[] args) |
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70 throws IOException, InterruptedException { |
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71 |
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72 StringBuffer sb = new StringBuffer(); |
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73 |
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74 for (int i=0; i < args.length; i++) { |
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75 sb.append(' '); |
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76 sb.append(args[i]); |
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77 } |
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78 //VirtualMachine vm = launchTarget(sb.toString()); |
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79 VirtualMachine vm = launchTarget(CLASS_NAME); |
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80 |
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81 System.out.println("Vm launched"); |
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82 // set watch field on already loaded classes |
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83 List<ReferenceType> referenceTypes = vm |
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84 .classesByName(CLASS_NAME); |
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85 for (ReferenceType refType : referenceTypes) { |
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86 addFieldWatch(vm, refType); |
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87 } |
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88 // watch for loaded classes |
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89 addClassWatch(vm); |
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90 |
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91 // process events |
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92 EventQueue eventQueue = vm.eventQueue(); |
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93 // resume the vm |
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94 |
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95 Process process = vm.process(); |
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96 |
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97 |
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98 // Copy target's output and error to our output and error. |
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99 Thread outThread = new StreamRedirectThread("out reader", process.getInputStream()); |
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100 Thread errThread = new StreamRedirectThread("error reader", process.getErrorStream()); |
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101 |
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102 errThread.start(); |
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103 outThread.start(); |
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104 |
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105 |
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106 vm.resume(); |
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107 boolean connected = true; |
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108 while (connected) { |
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109 EventSet eventSet = eventQueue.remove(); |
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110 for (Event event : eventSet) { |
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111 if (event instanceof VMDeathEvent |
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112 || event instanceof VMDisconnectEvent) { |
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113 // exit |
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114 connected = false; |
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115 } else if (event instanceof ClassPrepareEvent) { |
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116 // watch field on loaded class |
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117 System.out.println("ClassPrepareEvent"); |
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118 ClassPrepareEvent classPrepEvent = (ClassPrepareEvent) event; |
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119 ReferenceType refType = classPrepEvent |
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120 .referenceType(); |
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121 addFieldWatch(vm, refType); |
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122 } else if (event instanceof ModificationWatchpointEvent) { |
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123 System.out.println("sleep for 500 ms"); |
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124 Thread.sleep(500); |
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125 System.out.println("resume..."); |
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126 |
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127 ModificationWatchpointEvent modEvent = (ModificationWatchpointEvent) event; |
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128 System.out.println("old=" |
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129 + modEvent.valueCurrent()); |
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130 System.out.println("new=" + modEvent.valueToBe()); |
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131 System.out.println(); |
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132 } |
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133 } |
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134 eventSet.resume(); |
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135 } |
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136 // Shutdown begins when event thread terminates |
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137 try { |
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138 errThread.join(); // Make sure output is forwarded |
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139 outThread.join(); |
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140 } catch (InterruptedException exc) { |
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141 // we don't interrupt |
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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 * Find a com.sun.jdi.CommandLineLaunch connector |
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147 */ |
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148 static LaunchingConnector findLaunchingConnector() { |
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149 List <Connector> connectors = Bootstrap.virtualMachineManager().allConnectors(); |
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150 Iterator <Connector> iter = connectors.iterator(); |
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151 while (iter.hasNext()) { |
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152 Connector connector = iter.next(); |
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153 if (connector.name().equals("com.sun.jdi.CommandLineLaunch")) { |
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154 return (LaunchingConnector)connector; |
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155 } |
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156 } |
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157 throw new Error("No launching connector"); |
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158 } |
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159 /** |
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160 * Return the launching connector's arguments. |
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161 */ |
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162 static Map <String,Connector.Argument> connectorArguments(LaunchingConnector connector, String mainArgs) { |
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163 Map<String,Connector.Argument> arguments = connector.defaultArguments(); |
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164 for (String key : arguments.keySet()) { |
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165 System.out.println(key); |
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166 } |
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167 |
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168 Connector.Argument mainArg = (Connector.Argument)arguments.get("main"); |
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169 if (mainArg == null) { |
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170 throw new Error("Bad launching connector"); |
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171 } |
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172 mainArg.setValue(mainArgs); |
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173 |
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174 Connector.Argument optionsArg = (Connector.Argument)arguments.get("options"); |
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175 if (optionsArg == null) { |
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176 throw new Error("Bad launching connector"); |
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177 } |
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178 optionsArg.setValue(ARGUMENTS); |
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179 return arguments; |
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180 } |
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181 |
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182 static VirtualMachine launchTarget(String mainArgs) { |
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183 LaunchingConnector connector = findLaunchingConnector(); |
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184 Map arguments = connectorArguments(connector, mainArgs); |
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185 try { |
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186 return (VirtualMachine) connector.launch(arguments); |
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187 } catch (IOException exc) { |
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188 throw new Error("Unable to launch target VM: " + exc); |
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189 } catch (IllegalConnectorArgumentsException exc) { |
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190 throw new Error("Internal error: " + exc); |
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191 } catch (VMStartException exc) { |
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192 throw new Error("Target VM failed to initialize: " + |
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193 exc.getMessage()); |
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194 } |
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195 } |
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196 |
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197 |
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198 private static void addClassWatch(VirtualMachine vm) { |
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199 EventRequestManager erm = vm.eventRequestManager(); |
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200 ClassPrepareRequest classPrepareRequest = erm |
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201 .createClassPrepareRequest(); |
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202 classPrepareRequest.addClassFilter(CLASS_NAME); |
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203 classPrepareRequest.setEnabled(true); |
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204 } |
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205 |
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206 |
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207 private static void addFieldWatch(VirtualMachine vm, |
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208 ReferenceType refType) { |
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209 EventRequestManager erm = vm.eventRequestManager(); |
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210 Field field = refType.fieldByName(FIELD_NAME); |
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211 ModificationWatchpointRequest modificationWatchpointRequest = erm |
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212 .createModificationWatchpointRequest(field); |
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213 modificationWatchpointRequest.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD); |
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214 modificationWatchpointRequest.setEnabled(true); |
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215 } |
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216 } |
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217 |
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218 class StreamRedirectThread extends Thread { |
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219 |
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220 private final BufferedReader in; |
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221 |
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222 private static final int BUFFER_SIZE = 2048; |
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223 |
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224 /** |
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225 * Set up for copy. |
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226 * @param name Name of the thread |
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227 * @param in Stream to copy from |
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228 * @param out Stream to copy to |
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229 */ |
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230 StreamRedirectThread(String name, InputStream in) { |
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231 super(name); |
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232 this.in = new BufferedReader(new InputStreamReader(in)); |
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233 } |
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234 |
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235 /** |
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236 * Copy. |
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237 */ |
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238 public void run() { |
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239 try { |
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240 String line; |
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241 while ((line = in.readLine ()) != null) { |
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242 System.out.println ("testvm: " + line); |
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243 } |
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244 System.out.flush(); |
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245 } catch(IOException exc) { |
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246 System.err.println("Child I/O Transfer - " + exc); |
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247 } |
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248 } |
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249 } |