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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 1999, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package com.sun.tools.example.debug.bdi; | |
| 27 | + | |
| 28 | +import com.sun.jdi.*; | |
| 29 | +import com.sun.jdi.connect.LaunchingConnector; | |
| 30 | +import com.sun.jdi.connect.Connector; | |
| 31 | +import com.sun.jdi.connect.VMStartException; | |
| 32 | +import com.sun.jdi.connect.IllegalConnectorArgumentsException; | |
| 33 | +import java.io.*; | |
| 34 | +import java.util.Map; | |
| 35 | +import javax.swing.SwingUtilities; | |
| 36 | + | |
| 37 | + | |
| 38 | +class ChildSession extends Session { | |
| 39 | + | |
| 40 | + private Process process; | |
| 41 | + | |
| 42 | + private PrintWriter in; | |
| 43 | + private BufferedReader out; | |
| 44 | + private BufferedReader err; | |
| 45 | + | |
| 46 | + private InputListener input; | |
| 47 | + private OutputListener output; | |
| 48 | + private OutputListener error; | |
| 49 | + | |
| 50 | + public ChildSession(ExecutionManager runtime, | |
| 51 | + String userVMArgs, String cmdLine, | |
| 52 | + InputListener input, | |
| 53 | + OutputListener output, | |
| 54 | + OutputListener error, | |
| 55 | + OutputListener diagnostics) { | |
| 56 | + this(runtime, getVM(diagnostics, userVMArgs, cmdLine), | |
| 57 | + input, output, error, diagnostics); | |
| 58 | + } | |
| 59 | + | |
| 60 | + public ChildSession(ExecutionManager runtime, | |
| 61 | + LaunchingConnector connector, | |
| 62 | + Map<String, Connector.Argument> arguments, | |
| 63 | + InputListener input, | |
| 64 | + OutputListener output, | |
| 65 | + OutputListener error, | |
| 66 | + OutputListener diagnostics) { | |
| 67 | + this(runtime, generalGetVM(diagnostics, connector, arguments), | |
| 68 | + input, output, error, diagnostics); | |
| 69 | + } | |
| 70 | + | |
| 71 | + private ChildSession(ExecutionManager runtime, | |
| 72 | + VirtualMachine vm, | |
| 73 | + InputListener input, | |
| 74 | + OutputListener output, | |
| 75 | + OutputListener error, | |
| 76 | + OutputListener diagnostics) { | |
| 77 | + super(vm, runtime, diagnostics); | |
| 78 | + this.input = input; | |
| 79 | + this.output = output; | |
| 80 | + this.error = error; | |
| 81 | + } | |
| 82 | + | |
| 83 | + @Override | |
| 84 | + public boolean attach() { | |
| 85 | + | |
| 86 | + if (!connectToVMProcess()) { | |
| 87 | + diagnostics.putString("Could not launch VM"); | |
| 88 | + return false; | |
| 89 | + } | |
| 90 | + | |
| 91 | + /* | |
| 92 | + * Create a Thread that will retrieve and display any output. | |
| 93 | + * Needs to be high priority, else debugger may exit before | |
| 94 | + * it can be displayed. | |
| 95 | + */ | |
| 96 | + | |
| 97 | + //### Rename InputWriter and OutputReader classes | |
| 98 | + //### Thread priorities cribbed from ttydebug. Think about them. | |
| 99 | + | |
| 100 | + OutputReader outputReader = | |
| 101 | + new OutputReader("output reader", "output", | |
| 102 | + out, output, diagnostics); | |
| 103 | + outputReader.setPriority(Thread.MAX_PRIORITY-1); | |
| 104 | + outputReader.start(); | |
| 105 | + | |
| 106 | + OutputReader errorReader = | |
| 107 | + new OutputReader("error reader", "error", | |
| 108 | + err, error, diagnostics); | |
| 109 | + errorReader.setPriority(Thread.MAX_PRIORITY-1); | |
| 110 | + errorReader.start(); | |
| 111 | + | |
| 112 | + InputWriter inputWriter = | |
| 113 | + new InputWriter("input writer", in, input); | |
| 114 | + inputWriter.setPriority(Thread.MAX_PRIORITY-1); | |
| 115 | + inputWriter.start(); | |
| 116 | + | |
| 117 | + if (!super.attach()) { | |
| 118 | + if (process != null) { | |
| 119 | + process.destroy(); | |
| 120 | + process = null; | |
| 121 | + } | |
| 122 | + return false; | |
| 123 | + } | |
| 124 | + | |
| 125 | + //### debug | |
| 126 | + //System.out.println("IO after attach: "+ inputWriter + " " + outputReader + " "+ errorReader); | |
| 127 | + | |
| 128 | + return true; | |
| 129 | + } | |
| 130 | + | |
| 131 | + @Override | |
| 132 | + public void detach() { | |
| 133 | + | |
| 134 | + //### debug | |
| 135 | + //System.out.println("IO before detach: "+ inputWriter + " " + outputReader + " "+ errorReader); | |
| 136 | + | |
| 137 | + super.detach(); | |
| 138 | + | |
| 139 | + /* | |
| 140 | + inputWriter.quit(); | |
| 141 | + outputReader.quit(); | |
| 142 | + errorReader.quit(); | |
| 143 | + */ | |
| 144 | + | |
| 145 | + if (process != null) { | |
| 146 | + process.destroy(); | |
| 147 | + process = null; | |
| 148 | + } | |
| 149 | + | |
| 150 | + } | |
| 151 | + | |
| 152 | + /** | |
| 153 | + * Launch child java interpreter, return host:port | |
| 154 | + */ | |
| 155 | + | |
| 156 | + static private void dumpStream(OutputListener diagnostics, | |
| 157 | + InputStream stream) throws IOException { | |
| 158 | + BufferedReader in = | |
| 159 | + new BufferedReader(new InputStreamReader(stream)); | |
| 160 | + String line; | |
| 161 | + while ((line = in.readLine()) != null) { | |
| 162 | + diagnostics.putString(line); | |
| 163 | + } | |
| 164 | + } | |
| 165 | + | |
| 166 | + static private void dumpFailedLaunchInfo(OutputListener diagnostics, | |
| 167 | + Process process) { | |
| 168 | + try { | |
| 169 | + dumpStream(diagnostics, process.getErrorStream()); | |
| 170 | + dumpStream(diagnostics, process.getInputStream()); | |
| 171 | + } catch (IOException e) { | |
| 172 | + diagnostics.putString("Unable to display process output: " + | |
| 173 | + e.getMessage()); | |
| 174 | + } | |
| 175 | + } | |
| 176 | + | |
| 177 | + static private VirtualMachine getVM(OutputListener diagnostics, | |
| 178 | + String userVMArgs, | |
| 179 | + String cmdLine) { | |
| 180 | + VirtualMachineManager manager = Bootstrap.virtualMachineManager(); | |
| 181 | + LaunchingConnector connector = manager.defaultConnector(); | |
| 182 | + Map<String, Connector.Argument> arguments = connector.defaultArguments(); | |
| 183 | + arguments.get("options").setValue(userVMArgs); | |
| 184 | + arguments.get("main").setValue(cmdLine); | |
| 185 | + return generalGetVM(diagnostics, connector, arguments); | |
| 186 | + } | |
| 187 | + | |
| 188 | + static private VirtualMachine generalGetVM(OutputListener diagnostics, | |
| 189 | + LaunchingConnector connector, | |
| 190 | + Map<String, Connector.Argument> arguments) { | |
| 191 | + VirtualMachine vm = null; | |
| 192 | + try { | |
| 193 | + diagnostics.putString("Starting child."); | |
| 194 | + vm = connector.launch(arguments); | |
| 195 | + } catch (IOException ioe) { | |
| 196 | + diagnostics.putString("Unable to start child: " + ioe.getMessage()); | |
| 197 | + } catch (IllegalConnectorArgumentsException icae) { | |
| 198 | + diagnostics.putString("Unable to start child: " + icae.getMessage()); | |
| 199 | + } catch (VMStartException vmse) { | |
| 200 | + diagnostics.putString("Unable to start child: " + vmse.getMessage() + '\n'); | |
| 201 | + dumpFailedLaunchInfo(diagnostics, vmse.process()); | |
| 202 | + } | |
| 203 | + return vm; | |
| 204 | + } | |
| 205 | + | |
| 206 | + private boolean connectToVMProcess() { | |
| 207 | + if (vm == null) { | |
| 208 | + return false; | |
| 209 | + } | |
| 210 | + process = vm.process(); | |
| 211 | + in = new PrintWriter(new OutputStreamWriter(process.getOutputStream())); | |
| 212 | + //### Note small buffer sizes! | |
| 213 | + out = new BufferedReader(new InputStreamReader(process.getInputStream()), 1); | |
| 214 | + err = new BufferedReader(new InputStreamReader(process.getErrorStream()), 1); | |
| 215 | + return true; | |
| 216 | + } | |
| 217 | + | |
| 218 | + /** | |
| 219 | + * Threads to handle application input/output. | |
| 220 | + */ | |
| 221 | + | |
| 222 | + private static class OutputReader extends Thread { | |
| 223 | + | |
| 224 | + private String streamName; | |
| 225 | + private BufferedReader stream; | |
| 226 | + private OutputListener output; | |
| 227 | + private OutputListener diagnostics; | |
| 228 | + private boolean running = true; | |
| 229 | + private char[] buffer = new char[512]; | |
| 230 | + | |
| 231 | + OutputReader(String threadName, | |
| 232 | + String streamName, | |
| 233 | + BufferedReader stream, | |
| 234 | + OutputListener output, | |
| 235 | + OutputListener diagnostics) { | |
| 236 | + super(threadName); | |
| 237 | + this.streamName = streamName; | |
| 238 | + this.stream = stream; | |
| 239 | + this.output = output; | |
| 240 | + this.diagnostics = diagnostics; | |
| 241 | + } | |
| 242 | + | |
| 243 | + @Override | |
| 244 | + public void run() { | |
| 245 | + try { | |
| 246 | + int count; | |
| 247 | + while (running && (count = stream.read(buffer, 0, 512)) != -1) { | |
| 248 | + if (count > 0) { | |
| 249 | + // Run in Swing event dispatcher thread. | |
| 250 | + final String chars = new String(buffer, 0, count); | |
| 251 | + SwingUtilities.invokeLater(new Runnable() { | |
| 252 | + @Override | |
| 253 | + public void run() { | |
| 254 | + output.putString(chars); | |
| 255 | + } | |
| 256 | + }); | |
| 257 | + } | |
| 258 | + //### Should we sleep briefly here? | |
| 259 | + } | |
| 260 | + } catch (IOException e) { | |
| 261 | + // Run in Swing event dispatcher thread. | |
| 262 | + SwingUtilities.invokeLater(new Runnable() { | |
| 263 | + @Override | |
| 264 | + public void run() { | |
| 265 | + diagnostics.putString("IO error reading " + | |
| 266 | + streamName + | |
| 267 | + " stream of child java interpreter"); | |
| 268 | + } | |
| 269 | + }); | |
| 270 | + } | |
| 271 | + } | |
| 272 | + } | |
| 273 | + | |
| 274 | + private static class InputWriter extends Thread { | |
| 275 | + | |
| 276 | + private PrintWriter stream; | |
| 277 | + private InputListener input; | |
| 278 | + private boolean running = true; | |
| 279 | + | |
| 280 | + InputWriter(String threadName, | |
| 281 | + PrintWriter stream, | |
| 282 | + InputListener input) { | |
| 283 | + super(threadName); | |
| 284 | + this.stream = stream; | |
| 285 | + this.input = input; | |
| 286 | + } | |
| 287 | + | |
| 288 | + @Override | |
| 289 | + public void run() { | |
| 290 | + String line; | |
| 291 | + while (running) { | |
| 292 | + line = input.getLine(); | |
| 293 | + stream.println(line); | |
| 294 | + // Should not be needed for println above! | |
| 295 | + stream.flush(); | |
| 296 | + } | |
| 297 | + } | |
| 298 | + } | |
| 299 | + | |
| 300 | +} | |