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| 1 | +/* | |
| 2 | + * Copyright (c) 1999, 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.jdi; | |
| 27 | + | |
| 28 | +import com.sun.tools.jdi.*; | |
| 29 | +import com.sun.jdi.connect.*; | |
| 30 | +import com.sun.jdi.connect.spi.*; | |
| 31 | +import com.sun.jdi.*; | |
| 32 | + | |
| 33 | +import java.util.Map; | |
| 34 | +import java.util.StringTokenizer; | |
| 35 | +import java.util.List; | |
| 36 | +import java.util.ArrayList; | |
| 37 | +import java.io.IOException; | |
| 38 | +import java.io.InterruptedIOException; | |
| 39 | + | |
| 40 | +abstract class AbstractLauncher extends ConnectorImpl implements LaunchingConnector { | |
| 41 | + | |
| 42 | + abstract public VirtualMachine | |
| 43 | + launch(Map<String,? extends Connector.Argument> arguments) | |
| 44 | + throws IOException, | |
| 45 | + IllegalConnectorArgumentsException, | |
| 46 | + VMStartException; | |
| 47 | + abstract public String name(); | |
| 48 | + abstract public String description(); | |
| 49 | + | |
| 50 | + ThreadGroup grp; | |
| 51 | + | |
| 52 | + AbstractLauncher() { | |
| 53 | + super(); | |
| 54 | + | |
| 55 | + grp = Thread.currentThread().getThreadGroup(); | |
| 56 | + ThreadGroup parent = null; | |
| 57 | + while ((parent = grp.getParent()) != null) { | |
| 58 | + grp = parent; | |
| 59 | + } | |
| 60 | + } | |
| 61 | + | |
| 62 | + String[] tokenizeCommand(String command, char quote) { | |
| 63 | + String quoteStr = String.valueOf(quote); // easier to deal with | |
| 64 | + | |
| 65 | + /* | |
| 66 | + * Tokenize the command, respecting the given quote character. | |
| 67 | + */ | |
| 68 | + StringTokenizer tokenizer = new StringTokenizer(command, | |
| 69 | + quote + " \t\r\n\f", | |
| 70 | + true); | |
| 71 | + String quoted = null; | |
| 72 | + String pending = null; | |
| 73 | + List<String> tokenList = new ArrayList<String>(); | |
| 74 | + while (tokenizer.hasMoreTokens()) { | |
| 75 | + String token = tokenizer.nextToken(); | |
| 76 | + if (quoted != null) { | |
| 77 | + if (token.equals(quoteStr)) { | |
| 78 | + tokenList.add(quoted); | |
| 79 | + quoted = null; | |
| 80 | + } else { | |
| 81 | + quoted += token; | |
| 82 | + } | |
| 83 | + } else if (pending != null) { | |
| 84 | + if (token.equals(quoteStr)) { | |
| 85 | + quoted = pending; | |
| 86 | + } else if ((token.length() == 1) && | |
| 87 | + Character.isWhitespace(token.charAt(0))) { | |
| 88 | + tokenList.add(pending); | |
| 89 | + } else { | |
| 90 | + throw new InternalException("Unexpected token: " + token); | |
| 91 | + } | |
| 92 | + pending = null; | |
| 93 | + } else { | |
| 94 | + if (token.equals(quoteStr)) { | |
| 95 | + quoted = ""; | |
| 96 | + } else if ((token.length() == 1) && | |
| 97 | + Character.isWhitespace(token.charAt(0))) { | |
| 98 | + // continue | |
| 99 | + } else { | |
| 100 | + pending = token; | |
| 101 | + } | |
| 102 | + } | |
| 103 | + } | |
| 104 | + | |
| 105 | + /* | |
| 106 | + * Add final token. | |
| 107 | + */ | |
| 108 | + if (pending != null) { | |
| 109 | + tokenList.add(pending); | |
| 110 | + } | |
| 111 | + | |
| 112 | + /* | |
| 113 | + * An unclosed quote at the end of the command. Do an | |
| 114 | + * implicit end quote. | |
| 115 | + */ | |
| 116 | + if (quoted != null) { | |
| 117 | + tokenList.add(quoted); | |
| 118 | + } | |
| 119 | + | |
| 120 | + String[] tokenArray = new String[tokenList.size()]; | |
| 121 | + for (int i = 0; i < tokenList.size(); i++) { | |
| 122 | + tokenArray[i] = tokenList.get(i); | |
| 123 | + } | |
| 124 | + return tokenArray; | |
| 125 | + } | |
| 126 | + | |
| 127 | + protected VirtualMachine launch(String[] commandArray, String address, | |
| 128 | + TransportService.ListenKey listenKey, | |
| 129 | + TransportService ts) | |
| 130 | + throws IOException, VMStartException { | |
| 131 | + Helper helper = new Helper(commandArray, address, listenKey, ts); | |
| 132 | + helper.launchAndAccept(); | |
| 133 | + | |
| 134 | + VirtualMachineManager manager = | |
| 135 | + Bootstrap.virtualMachineManager(); | |
| 136 | + | |
| 137 | + return manager.createVirtualMachine(helper.connection(), | |
| 138 | + helper.process()); | |
| 139 | + } | |
| 140 | + | |
| 141 | + /** | |
| 142 | + * This class simply provides a context for a single launch and | |
| 143 | + * accept. It provides instance fields that can be used by | |
| 144 | + * all threads involved. This stuff can't be in the Connector proper | |
| 145 | + * because the connector is is a singleton and not specific to any | |
| 146 | + * one launch. | |
| 147 | + */ | |
| 148 | + private class Helper { | |
| 149 | + private final String address; | |
| 150 | + private TransportService.ListenKey listenKey; | |
| 151 | + private TransportService ts; | |
| 152 | + private final String[] commandArray; | |
| 153 | + private Process process = null; | |
| 154 | + private Connection connection = null; | |
| 155 | + private IOException acceptException = null; | |
| 156 | + private boolean exited = false; | |
| 157 | + | |
| 158 | + Helper(String[] commandArray, String address, TransportService.ListenKey listenKey, | |
| 159 | + TransportService ts) { | |
| 160 | + this.commandArray = commandArray; | |
| 161 | + this.address = address; | |
| 162 | + this.listenKey = listenKey; | |
| 163 | + this.ts = ts; | |
| 164 | + } | |
| 165 | + | |
| 166 | + String commandString() { | |
| 167 | + String str = ""; | |
| 168 | + for (int i = 0; i < commandArray.length; i++) { | |
| 169 | + if (i > 0) { | |
| 170 | + str += " "; | |
| 171 | + } | |
| 172 | + str += commandArray[i]; | |
| 173 | + } | |
| 174 | + return str; | |
| 175 | + } | |
| 176 | + | |
| 177 | + synchronized void launchAndAccept() throws | |
| 178 | + IOException, VMStartException { | |
| 179 | + | |
| 180 | + process = Runtime.getRuntime().exec(commandArray); | |
| 181 | + | |
| 182 | + Thread acceptingThread = acceptConnection(); | |
| 183 | + Thread monitoringThread = monitorTarget(); | |
| 184 | + try { | |
| 185 | + while ((connection == null) && | |
| 186 | + (acceptException == null) && | |
| 187 | + !exited) { | |
| 188 | + wait(); | |
| 189 | + } | |
| 190 | + | |
| 191 | + if (exited) { | |
| 192 | + throw new VMStartException( | |
| 193 | + "VM initialization failed for: " + commandString(), process); | |
| 194 | + } | |
| 195 | + if (acceptException != null) { | |
| 196 | + // Rethrow the exception in this thread | |
| 197 | + throw acceptException; | |
| 198 | + } | |
| 199 | + } catch (InterruptedException e) { | |
| 200 | + throw new InterruptedIOException("Interrupted during accept"); | |
| 201 | + } finally { | |
| 202 | + acceptingThread.interrupt(); | |
| 203 | + monitoringThread.interrupt(); | |
| 204 | + } | |
| 205 | + } | |
| 206 | + | |
| 207 | + Process process() { | |
| 208 | + return process; | |
| 209 | + } | |
| 210 | + | |
| 211 | + Connection connection() { | |
| 212 | + return connection; | |
| 213 | + } | |
| 214 | + | |
| 215 | + synchronized void notifyOfExit() { | |
| 216 | + exited = true; | |
| 217 | + notify(); | |
| 218 | + } | |
| 219 | + | |
| 220 | + synchronized void notifyOfConnection(Connection connection) { | |
| 221 | + this.connection = connection; | |
| 222 | + notify(); | |
| 223 | + } | |
| 224 | + | |
| 225 | + synchronized void notifyOfAcceptException(IOException acceptException) { | |
| 226 | + this.acceptException = acceptException; | |
| 227 | + notify(); | |
| 228 | + } | |
| 229 | + | |
| 230 | + Thread monitorTarget() { | |
| 231 | + Thread thread = new Thread(grp, | |
| 232 | + "launched target monitor") { | |
| 233 | + public void run() { | |
| 234 | + try { | |
| 235 | + process.waitFor(); | |
| 236 | + /* | |
| 237 | + * Notify waiting thread of VM error termination | |
| 238 | + */ | |
| 239 | + notifyOfExit(); | |
| 240 | + } catch (InterruptedException e) { | |
| 241 | + // Connection has been established, stop monitoring | |
| 242 | + } | |
| 243 | + } | |
| 244 | + }; | |
| 245 | + thread.setDaemon(true); | |
| 246 | + thread.start(); | |
| 247 | + return thread; | |
| 248 | + } | |
| 249 | + | |
| 250 | + Thread acceptConnection() { | |
| 251 | + Thread thread = new Thread(grp, | |
| 252 | + "connection acceptor") { | |
| 253 | + public void run() { | |
| 254 | + try { | |
| 255 | + Connection connection = ts.accept(listenKey, 0, 0); | |
| 256 | + /* | |
| 257 | + * Notify waiting thread of connection | |
| 258 | + */ | |
| 259 | + notifyOfConnection(connection); | |
| 260 | + } catch (InterruptedIOException e) { | |
| 261 | + // VM terminated, stop accepting | |
| 262 | + } catch (IOException e) { | |
| 263 | + // Report any other exception to waiting thread | |
| 264 | + notifyOfAcceptException(e); | |
| 265 | + } | |
| 266 | + } | |
| 267 | + }; | |
| 268 | + thread.setDaemon(true); | |
| 269 | + thread.start(); | |
| 270 | + return thread; | |
| 271 | + } | |
| 272 | + } | |
| 273 | +} | |