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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2008, 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.tty; | |
| 27 | + | |
| 28 | +import com.sun.jdi.*; | |
| 29 | +import com.sun.jdi.connect.*; | |
| 30 | +import com.sun.jdi.request.EventRequestManager; | |
| 31 | +import com.sun.jdi.request.ThreadStartRequest; | |
| 32 | +import com.sun.jdi.request.ThreadDeathRequest; | |
| 33 | + | |
| 34 | +import java.util.*; | |
| 35 | +import java.util.regex.*; | |
| 36 | +import java.io.*; | |
| 37 | + | |
| 38 | +class VMConnection { | |
| 39 | + | |
| 40 | + private VirtualMachine vm; | |
| 41 | + private Process process = null; | |
| 42 | + private int outputCompleteCount = 0; | |
| 43 | + | |
| 44 | + private final Connector connector; | |
| 45 | + private final Map<String, com.sun.jdi.connect.Connector.Argument> connectorArgs; | |
| 46 | + private final int traceFlags; | |
| 47 | + | |
| 48 | + synchronized void notifyOutputComplete() { | |
| 49 | + outputCompleteCount++; | |
| 50 | + notifyAll(); | |
| 51 | + } | |
| 52 | + | |
| 53 | + synchronized void waitOutputComplete() { | |
| 54 | + // Wait for stderr and stdout | |
| 55 | + if (process != null) { | |
| 56 | + while (outputCompleteCount < 2) { | |
| 57 | + try {wait();} catch (InterruptedException e) {} | |
| 58 | + } | |
| 59 | + } | |
| 60 | + } | |
| 61 | + | |
| 62 | + private Connector findConnector(String name) { | |
| 63 | + for (Connector connector : | |
| 64 | + Bootstrap.virtualMachineManager().allConnectors()) { | |
| 65 | + if (connector.name().equals(name)) { | |
| 66 | + return connector; | |
| 67 | + } | |
| 68 | + } | |
| 69 | + return null; | |
| 70 | + } | |
| 71 | + | |
| 72 | + private Map <String, com.sun.jdi.connect.Connector.Argument> parseConnectorArgs(Connector connector, String argString) { | |
| 73 | + Map<String, com.sun.jdi.connect.Connector.Argument> arguments = connector.defaultArguments(); | |
| 74 | + | |
| 75 | + /* | |
| 76 | + * We are parsing strings of the form: | |
| 77 | + * name1=value1,[name2=value2,...] | |
| 78 | + * However, the value1...valuen substrings may contain | |
| 79 | + * embedded comma(s), so make provision for quoting inside | |
| 80 | + * the value substrings. (Bug ID 4285874) | |
| 81 | + */ | |
| 82 | + String regexPattern = | |
| 83 | + "(quote=[^,]+,)|" + // special case for quote=., | |
| 84 | + "(\\w+=)" + // name= | |
| 85 | + "(((\"[^\"]*\")|" + // ( "l , ue" | |
| 86 | + "('[^']*')|" + // 'l , ue' | |
| 87 | + "([^,'\"]+))+,)"; // v a l u e )+ , | |
| 88 | + Pattern p = Pattern.compile(regexPattern); | |
| 89 | + Matcher m = p.matcher(argString); | |
| 90 | + while (m.find()) { | |
| 91 | + int startPosition = m.start(); | |
| 92 | + int endPosition = m.end(); | |
| 93 | + if (startPosition > 0) { | |
| 94 | + /* | |
| 95 | + * It is an error if parsing skips over any part of argString. | |
| 96 | + */ | |
| 97 | + throw new IllegalArgumentException | |
| 98 | + (MessageOutput.format("Illegal connector argument", | |
| 99 | + argString)); | |
| 100 | + } | |
| 101 | + | |
| 102 | + String token = argString.substring(startPosition, endPosition); | |
| 103 | + int index = token.indexOf('='); | |
| 104 | + String name = token.substring(0, index); | |
| 105 | + String value = token.substring(index + 1, | |
| 106 | + token.length() - 1); // Remove comma delimiter | |
| 107 | + | |
| 108 | + Connector.Argument argument = arguments.get(name); | |
| 109 | + if (argument == null) { | |
| 110 | + throw new IllegalArgumentException | |
| 111 | + (MessageOutput.format("Argument is not defined for connector:", | |
| 112 | + new Object [] {name, connector.name()})); | |
| 113 | + } | |
| 114 | + argument.setValue(value); | |
| 115 | + | |
| 116 | + argString = argString.substring(endPosition); // Remove what was just parsed... | |
| 117 | + m = p.matcher(argString); // and parse again on what is left. | |
| 118 | + } | |
| 119 | + if ((! argString.equals(",")) && (argString.length() > 0)) { | |
| 120 | + /* | |
| 121 | + * It is an error if any part of argString is left over, | |
| 122 | + * unless it was empty to begin with. | |
| 123 | + */ | |
| 124 | + throw new IllegalArgumentException | |
| 125 | + (MessageOutput.format("Illegal connector argument", argString)); | |
| 126 | + } | |
| 127 | + return arguments; | |
| 128 | + } | |
| 129 | + | |
| 130 | + VMConnection(String connectSpec, int traceFlags) { | |
| 131 | + String nameString; | |
| 132 | + String argString; | |
| 133 | + int index = connectSpec.indexOf(':'); | |
| 134 | + if (index == -1) { | |
| 135 | + nameString = connectSpec; | |
| 136 | + argString = ""; | |
| 137 | + } else { | |
| 138 | + nameString = connectSpec.substring(0, index); | |
| 139 | + argString = connectSpec.substring(index + 1); | |
| 140 | + } | |
| 141 | + | |
| 142 | + connector = findConnector(nameString); | |
| 143 | + if (connector == null) { | |
| 144 | + throw new IllegalArgumentException | |
| 145 | + (MessageOutput.format("No connector named:", nameString)); | |
| 146 | + } | |
| 147 | + | |
| 148 | + connectorArgs = parseConnectorArgs(connector, argString); | |
| 149 | + this.traceFlags = traceFlags; | |
| 150 | + } | |
| 151 | + | |
| 152 | + synchronized VirtualMachine open() { | |
| 153 | + if (connector instanceof LaunchingConnector) { | |
| 154 | + vm = launchTarget(); | |
| 155 | + } else if (connector instanceof AttachingConnector) { | |
| 156 | + vm = attachTarget(); | |
| 157 | + } else if (connector instanceof ListeningConnector) { | |
| 158 | + vm = listenTarget(); | |
| 159 | + } else { | |
| 160 | + throw new InternalError | |
| 161 | + (MessageOutput.format("Invalid connect type")); | |
| 162 | + } | |
| 163 | + vm.setDebugTraceMode(traceFlags); | |
| 164 | + if (vm.canBeModified()){ | |
| 165 | + setEventRequests(vm); | |
| 166 | + resolveEventRequests(); | |
| 167 | + } | |
| 168 | + /* | |
| 169 | + * Now that the vm connection is open, fetch the debugee | |
| 170 | + * classpath and set up a default sourcepath. | |
| 171 | + * (Unless user supplied a sourcepath on the command line) | |
| 172 | + * (Bug ID 4186582) | |
| 173 | + */ | |
| 174 | + if (Env.getSourcePath().length() == 0) { | |
| 175 | + if (vm instanceof PathSearchingVirtualMachine) { | |
| 176 | + PathSearchingVirtualMachine psvm = | |
| 177 | + (PathSearchingVirtualMachine) vm; | |
| 178 | + Env.setSourcePath(psvm.classPath()); | |
| 179 | + } else { | |
| 180 | + Env.setSourcePath("."); | |
| 181 | + } | |
| 182 | + } | |
| 183 | + | |
| 184 | + return vm; | |
| 185 | + } | |
| 186 | + | |
| 187 | + boolean setConnectorArg(String name, String value) { | |
| 188 | + /* | |
| 189 | + * Too late if the connection already made | |
| 190 | + */ | |
| 191 | + if (vm != null) { | |
| 192 | + return false; | |
| 193 | + } | |
| 194 | + | |
| 195 | + Connector.Argument argument = connectorArgs.get(name); | |
| 196 | + if (argument == null) { | |
| 197 | + return false; | |
| 198 | + } | |
| 199 | + argument.setValue(value); | |
| 200 | + return true; | |
| 201 | + } | |
| 202 | + | |
| 203 | + String connectorArg(String name) { | |
| 204 | + Connector.Argument argument = connectorArgs.get(name); | |
| 205 | + if (argument == null) { | |
| 206 | + return ""; | |
| 207 | + } | |
| 208 | + return argument.value(); | |
| 209 | + } | |
| 210 | + | |
| 211 | + public synchronized VirtualMachine vm() { | |
| 212 | + if (vm == null) { | |
| 213 | + throw new VMNotConnectedException(); | |
| 214 | + } else { | |
| 215 | + return vm; | |
| 216 | + } | |
| 217 | + } | |
| 218 | + | |
| 219 | + boolean isOpen() { | |
| 220 | + return (vm != null); | |
| 221 | + } | |
| 222 | + | |
| 223 | + boolean isLaunch() { | |
| 224 | + return (connector instanceof LaunchingConnector); | |
| 225 | + } | |
| 226 | + | |
| 227 | + public void disposeVM() { | |
| 228 | + try { | |
| 229 | + if (vm != null) { | |
| 230 | + vm.dispose(); | |
| 231 | + vm = null; | |
| 232 | + } | |
| 233 | + } finally { | |
| 234 | + if (process != null) { | |
| 235 | + process.destroy(); | |
| 236 | + process = null; | |
| 237 | + } | |
| 238 | + waitOutputComplete(); | |
| 239 | + } | |
| 240 | + } | |
| 241 | + | |
| 242 | + private void setEventRequests(VirtualMachine vm) { | |
| 243 | + EventRequestManager erm = vm.eventRequestManager(); | |
| 244 | + | |
| 245 | + // Normally, we want all uncaught exceptions. We request them | |
| 246 | + // via the same mechanism as Commands.commandCatchException() | |
| 247 | + // so the user can ignore them later if they are not | |
| 248 | + // interested. | |
| 249 | + // FIXME: this works but generates spurious messages on stdout | |
| 250 | + // during startup: | |
| 251 | + // Set uncaught java.lang.Throwable | |
| 252 | + // Set deferred uncaught java.lang.Throwable | |
| 253 | + Commands evaluator = new Commands(); | |
| 254 | + evaluator.commandCatchException | |
| 255 | + (new StringTokenizer("uncaught java.lang.Throwable")); | |
| 256 | + | |
| 257 | + ThreadStartRequest tsr = erm.createThreadStartRequest(); | |
| 258 | + tsr.enable(); | |
| 259 | + ThreadDeathRequest tdr = erm.createThreadDeathRequest(); | |
| 260 | + tdr.enable(); | |
| 261 | + } | |
| 262 | + | |
| 263 | + private void resolveEventRequests() { | |
| 264 | + Env.specList.resolveAll(); | |
| 265 | + } | |
| 266 | + | |
| 267 | + private void dumpStream(InputStream stream) throws IOException { | |
| 268 | + BufferedReader in = | |
| 269 | + new BufferedReader(new InputStreamReader(stream)); | |
| 270 | + int i; | |
| 271 | + try { | |
| 272 | + while ((i = in.read()) != -1) { | |
| 273 | + MessageOutput.printDirect((char)i);// Special case: use | |
| 274 | + // printDirect() | |
| 275 | + } | |
| 276 | + } catch (IOException ex) { | |
| 277 | + String s = ex.getMessage(); | |
| 278 | + if (!s.startsWith("Bad file number")) { | |
| 279 | + throw ex; | |
| 280 | + } | |
| 281 | + // else we got a Bad file number IOException which just means | |
| 282 | + // that the debuggee has gone away. We'll just treat it the | |
| 283 | + // same as if we got an EOF. | |
| 284 | + } | |
| 285 | + } | |
| 286 | + | |
| 287 | + /** | |
| 288 | + * Create a Thread that will retrieve and display any output. | |
| 289 | + * Needs to be high priority, else debugger may exit before | |
| 290 | + * it can be displayed. | |
| 291 | + */ | |
| 292 | + private void displayRemoteOutput(final InputStream stream) { | |
| 293 | + Thread thr = new Thread("output reader") { | |
| 294 | + @Override | |
| 295 | + public void run() { | |
| 296 | + try { | |
| 297 | + dumpStream(stream); | |
| 298 | + } catch (IOException ex) { | |
| 299 | + MessageOutput.fatalError("Failed reading output"); | |
| 300 | + } finally { | |
| 301 | + notifyOutputComplete(); | |
| 302 | + } | |
| 303 | + } | |
| 304 | + }; | |
| 305 | + thr.setPriority(Thread.MAX_PRIORITY-1); | |
| 306 | + thr.start(); | |
| 307 | + } | |
| 308 | + | |
| 309 | + private void dumpFailedLaunchInfo(Process process) { | |
| 310 | + try { | |
| 311 | + dumpStream(process.getErrorStream()); | |
| 312 | + dumpStream(process.getInputStream()); | |
| 313 | + } catch (IOException e) { | |
| 314 | + MessageOutput.println("Unable to display process output:", | |
| 315 | + e.getMessage()); | |
| 316 | + } | |
| 317 | + } | |
| 318 | + | |
| 319 | + /* launch child target vm */ | |
| 320 | + private VirtualMachine launchTarget() { | |
| 321 | + LaunchingConnector launcher = (LaunchingConnector)connector; | |
| 322 | + try { | |
| 323 | + VirtualMachine vm = launcher.launch(connectorArgs); | |
| 324 | + process = vm.process(); | |
| 325 | + displayRemoteOutput(process.getErrorStream()); | |
| 326 | + displayRemoteOutput(process.getInputStream()); | |
| 327 | + return vm; | |
| 328 | + } catch (IOException ioe) { | |
| 329 | + ioe.printStackTrace(); | |
| 330 | + MessageOutput.fatalError("Unable to launch target VM."); | |
| 331 | + } catch (IllegalConnectorArgumentsException icae) { | |
| 332 | + icae.printStackTrace(); | |
| 333 | + MessageOutput.fatalError("Internal debugger error."); | |
| 334 | + } catch (VMStartException vmse) { | |
| 335 | + MessageOutput.println("vmstartexception", vmse.getMessage()); | |
| 336 | + MessageOutput.println(); | |
| 337 | + dumpFailedLaunchInfo(vmse.process()); | |
| 338 | + MessageOutput.fatalError("Target VM failed to initialize."); | |
| 339 | + } | |
| 340 | + return null; // Shuts up the compiler | |
| 341 | + } | |
| 342 | + | |
| 343 | + /* attach to running target vm */ | |
| 344 | + private VirtualMachine attachTarget() { | |
| 345 | + AttachingConnector attacher = (AttachingConnector)connector; | |
| 346 | + try { | |
| 347 | + return attacher.attach(connectorArgs); | |
| 348 | + } catch (IOException ioe) { | |
| 349 | + ioe.printStackTrace(); | |
| 350 | + MessageOutput.fatalError("Unable to attach to target VM."); | |
| 351 | + } catch (IllegalConnectorArgumentsException icae) { | |
| 352 | + icae.printStackTrace(); | |
| 353 | + MessageOutput.fatalError("Internal debugger error."); | |
| 354 | + } | |
| 355 | + return null; // Shuts up the compiler | |
| 356 | + } | |
| 357 | + | |
| 358 | + /* listen for connection from target vm */ | |
| 359 | + private VirtualMachine listenTarget() { | |
| 360 | + ListeningConnector listener = (ListeningConnector)connector; | |
| 361 | + try { | |
| 362 | + String retAddress = listener.startListening(connectorArgs); | |
| 363 | + MessageOutput.println("Listening at address:", retAddress); | |
| 364 | + vm = listener.accept(connectorArgs); | |
| 365 | + listener.stopListening(connectorArgs); | |
| 366 | + return vm; | |
| 367 | + } catch (IOException ioe) { | |
| 368 | + ioe.printStackTrace(); | |
| 369 | + MessageOutput.fatalError("Unable to attach to target VM."); | |
| 370 | + } catch (IllegalConnectorArgumentsException icae) { | |
| 371 | + icae.printStackTrace(); | |
| 372 | + MessageOutput.fatalError("Internal debugger error."); | |
| 373 | + } | |
| 374 | + return null; // Shuts up the compiler | |
| 375 | + } | |
| 376 | +} | |