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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2004, 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.jdi; | ||
| 27 | |||
| 28 | import com.sun.jdi.connect.*; | ||
| 29 | import com.sun.jdi.connect.spi.Connection; | ||
| 30 | import java.util.List; | ||
| 31 | import java.io.IOException; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * A manager of connections to target virtual machines. The | ||
| 35 | * VirtualMachineManager allows one application to debug | ||
| 36 | * multiple target VMs. (Note that the converse is not | ||
| 37 | * supported; a target VM can be debugged by only one | ||
| 38 | * debugger application.) This interface | ||
| 39 | * contains methods to manage connections | ||
| 40 | * to remote target VMs and to obtain the {@link VirtualMachine} | ||
| 41 | * mirror for available target VMs. | ||
| 42 | * <p> | ||
| 43 | * Connections can be made using one of several different | ||
| 44 | * {@link com.sun.jdi.connect.Connector} objects. Each connector encapsulates | ||
| 45 | * a different way of connecting the debugger with a target VM. | ||
| 46 | * <p> | ||
| 47 | * The VirtualMachineManager supports many different scenarios for | ||
| 48 | * connecting a debugger to a virtual machine. Four examples | ||
| 49 | * are presented in the table below. The | ||
| 50 | * examples use the command line syntax in Sun's implementation. | ||
| 51 | * Some {@link com.sun.jdi.connect.Connector} implementations may require slightly | ||
| 52 | * different handling than presented below. | ||
| 53 | * <p> | ||
| 54 | * <TABLE BORDER WIDTH="75%" SUMMARY="Four scenarios for connecting a debugger | ||
| 55 | * to a virtual machine"> | ||
| 56 | * <TR> | ||
| 57 | * <TH scope=col>Scenario</TH> | ||
| 58 | * <TH scope=col>Description</TH> | ||
| 59 | * <TR> | ||
| 60 | * <TD>Debugger launches target VM (simplest, most-common scenario)</TD> | ||
| 61 | * | ||
| 62 | * <TD>Debugger calls the | ||
| 63 | * {@link com.sun.jdi.connect.LaunchingConnector#launch(java.util.Map)} | ||
| 64 | * method of the default connector, obtained with {@link #defaultConnector}. The | ||
| 65 | * target VM is launched, and a connection between that VM and the | ||
| 66 | * debugger is established. A {@link VirtualMachine} mirror is returned. | ||
| 67 | * <P>Or, for more control | ||
| 68 | * <UL> | ||
| 69 | * <LI> | ||
| 70 | * Debugger selects a connector from the list returned by | ||
| 71 | * {@link #launchingConnectors} with desired characteristics | ||
| 72 | * (for example, transport type, etc.). | ||
| 73 | * <LI> | ||
| 74 | * Debugger calls the | ||
| 75 | * {@link com.sun.jdi.connect.LaunchingConnector#launch(java.util.Map)} | ||
| 76 | * method of the selected connector. The | ||
| 77 | * target VM is launched, and a connection between that VM and the | ||
| 78 | * debugger is established. A {@link VirtualMachine} mirror is returned. | ||
| 79 | * </UL> | ||
| 80 | * </TD> | ||
| 81 | * </TR> | ||
| 82 | * <TR> | ||
| 83 | * <TD>Debugger attaches to previously-running VM</TD> | ||
| 84 | * <TD> | ||
| 85 | * <UL> | ||
| 86 | * <LI> | ||
| 87 | * Target VM is launched using the options | ||
| 88 | * <code>-agentlib:jdwp=transport=xxx,server=y</code> | ||
| 89 | * </LI> | ||
| 90 | * <LI> | ||
| 91 | * Target VM generates and outputs the tranport-specific address at which it will | ||
| 92 | * listen for a connection.</LI> | ||
| 93 | * <LI> | ||
| 94 | * Debugger is launched. Debugger selects a connector in the list | ||
| 95 | * returned by {@link #attachingConnectors} matching the transport with | ||
| 96 | * the name "xxx". | ||
| 97 | * <LI> | ||
| 98 | * Debugger presents the default connector parameters (obtained through | ||
| 99 | * {@link com.sun.jdi.connect.Connector#defaultArguments()}) to the end user, | ||
| 100 | * allowing the user to | ||
| 101 | * fill in the transport-specific address generated by the target VM. | ||
| 102 | * <LI> | ||
| 103 | * Debugger calls the {@link com.sun.jdi.connect.AttachingConnector#attach(java.util.Map)} method | ||
| 104 | * of the selected to attach to the target VM. A {@link VirtualMachine} | ||
| 105 | * mirror is returned. | ||
| 106 | * </UL> | ||
| 107 | * </TD> | ||
| 108 | * </TR> | ||
| 109 | * | ||
| 110 | * <TR> | ||
| 111 | * <TD>Target VM attaches to previously-running debugger</TD> | ||
| 112 | * <TD> | ||
| 113 | * <LI> | ||
| 114 | * At startup, debugger selects one or more connectors from | ||
| 115 | * the list returned by {@link #listeningConnectors} for one or more | ||
| 116 | * transports.</LI> | ||
| 117 | * <LI> | ||
| 118 | * Debugger calls the {@link com.sun.jdi.connect.ListeningConnector#startListening(java.util.Map)} method for each selected | ||
| 119 | * connector. For each call, a transport-specific address string is | ||
| 120 | * generated and returned. The debugger makes the transport names and | ||
| 121 | * corresponding address strings available to the end user. | ||
| 122 | * <LI> | ||
| 123 | * Debugger calls | ||
| 124 | * {@link com.sun.jdi.connect.ListeningConnector#accept(java.util.Map)} | ||
| 125 | * for each selected connector to wait for | ||
| 126 | * a target VM to connect.</LI> | ||
| 127 | * <LI> | ||
| 128 | * Later, target VM is launched by end user with the options | ||
| 129 | * <code>-agentlib:jdwp=transport=xxx,address=yyy</code> | ||
| 130 | * where "xxx" the transport for one of the connectors selected by the | ||
| 131 | * the debugger and "yyy" | ||
| 132 | * is the address generated by | ||
| 133 | * {@link com.sun.jdi.connect.ListeningConnector#accept(java.util.Map)} for that | ||
| 134 | * transport.</LI> | ||
| 135 | * <LI> | ||
| 136 | * Debugger's call to {@link com.sun.jdi.connect.ListeningConnector#accept(java.util.Map)} returns | ||
| 137 | * a {@link VirtualMachine} mirror.</LI> | ||
| 138 | * </TD> | ||
| 139 | * </TR> | ||
| 140 | * | ||
| 141 | * <TR> | ||
| 142 | * <TD>Target VM launches debugger (sometimes called "Just-In-Time" debugging)</TD> | ||
| 143 | * <TD> | ||
| 144 | * <LI> | ||
| 145 | * Target VM is launched with the options | ||
| 146 | * <code>-agentlib:jdwp=launch=cmdline,onuncaught=y,transport=xxx,server=y</code> | ||
| 147 | * </LI> | ||
| 148 | * <LI> | ||
| 149 | * Later, an uncaught exception is thrown in the target VM. The target | ||
| 150 | * VM generates the tranport-specific address at which it will | ||
| 151 | * listen for a connection. | ||
| 152 | * <LI>Target VM launches the debugger with the following items concatenated | ||
| 153 | * together (separated by spaces) to form the command line: | ||
| 154 | * <UL> | ||
| 155 | * <LI> The launch= value | ||
| 156 | * <LI> The transport= value | ||
| 157 | * <LI> The generated transport-specific address at which VM is listening for | ||
| 158 | * debugger connection. | ||
| 159 | * </UL> | ||
| 160 | * <LI> | ||
| 161 | * Upon launch, debugger selects a connector in the list | ||
| 162 | * returned by {@link #attachingConnectors} matching the transport with | ||
| 163 | * the name "xxx". | ||
| 164 | * <LI> | ||
| 165 | * Debugger changes the default connector parameters (obtained through | ||
| 166 | * {@link com.sun.jdi.connect.Connector#defaultArguments()}) to specify | ||
| 167 | * the transport specific address at which the VM is listenig. Optionally, | ||
| 168 | * other connector arguments can be presented to the user. | ||
| 169 | * <LI> | ||
| 170 | * Debugger calls the | ||
| 171 | * {@link com.sun.jdi.connect.AttachingConnector#attach(java.util.Map)} method | ||
| 172 | * of the selected to attach to the target VM. A {@link VirtualMachine} | ||
| 173 | * mirror is returned. | ||
| 174 | * </TD> | ||
| 175 | * </TR> | ||
| 176 | * </TABLE> | ||
| 177 | * | ||
| 178 | * <p> Connectors are created at start-up time. That is, they | ||
| 179 | * are created the first time that {@link | ||
| 180 | * com.sun.jdi.Bootstrap#virtualMachineManager()} is invoked. | ||
| 181 | * The list of all Connectors created at start-up time can be | ||
| 182 | * obtained from the VirtualMachineManager by invoking the | ||
| 183 | * {@link #allConnectors allConnectors} method. | ||
| 184 | * | ||
| 185 | * <p> Connectors are created at start-up time if they are | ||
| 186 | * installed on the platform. In addition, Connectors are created | ||
| 187 | * automatically by the VirtualMachineManager to encapsulate any | ||
| 188 | * {@link com.sun.jdi.connect.spi.TransportService} implementations | ||
| 189 | * that are installed on the platform. These two mechanisms for | ||
| 190 | * creating Connectors are described here. | ||
| 191 | * | ||
| 192 | * <p> A Connector is installed on the platform if it is installed | ||
| 193 | * in a jar file that is visible to the defining class loader of | ||
| 194 | * the {@link com.sun.jdi.connect.Connector} type, | ||
| 195 | * and that jar file contains a provider configuration file named | ||
| 196 | * <tt>com.sun.jdi.connect.Connector</tt> in the resource directory | ||
| 197 | * <tt>META-INF/services</tt>, and the provider configuration file | ||
| 198 | * lists the full-qualified class name of the Connector | ||
| 199 | * implementation. A Connector is a class that implements the | ||
| 200 | * {@link com.sun.jdi.connect.Connector Connector} interface. More | ||
| 201 | * appropriately the class implements one of the specific Connector | ||
| 202 | * types, namely {@link com.sun.jdi.connect.AttachingConnector | ||
| 203 | * AttachingConnector}, {@link com.sun.jdi.connect.ListeningConnector | ||
| 204 | * ListeningConnector}, or {@link com.sun.jdi.connect.LaunchingConnector | ||
| 205 | * LaunchingConnector}. The format of the provider configuration file | ||
| 206 | * is one fully-qualified class name per line. Space and tab characters | ||
| 207 | * surrounding each class, as well as blank lines are ignored. The | ||
| 208 | * comment character is <tt>'#'</tt> (<tt>0x23</tt>), and on each | ||
| 209 | * line all characters following the first comment character are | ||
| 210 | * ignored. The file must be encoded in UTF-8. | ||
| 211 | * | ||
| 212 | * <p> At start-up time the VirtualMachineManager attempts to load | ||
| 213 | * and instantiate (using the no-arg constructor) each class listed | ||
| 214 | * in the provider configuration file. Exceptions thrown when loading | ||
| 215 | * or creating the Connector are caught and ignored. In other words, | ||
| 216 | * the start-up process continues despite of errors. | ||
| 217 | * | ||
| 218 | * <p> In addition to Connectors installed on the platform the | ||
| 219 | * VirtualMachineManager will also create Connectors to encapsulate | ||
| 220 | * any {@link com.sun.jdi.connect.spi.TransportService} implementations | ||
| 221 | * that are installed on the platform. A TransportService is | ||
| 222 | * installed on the platform if it installed in a jar file that is | ||
| 223 | * visible to the defining class loader for the | ||
| 224 | * {@link com.sun.jdi.connect.spi.TransportService} type, and that jar | ||
| 225 | * file contains a provider configuration file named | ||
| 226 | * <tt>com.sun.jdi.connect.spi.TransportService</tt> in the resource | ||
| 227 | * directory <tt>META-INF/services</tt>, and the provider | ||
| 228 | * configuration file lists the the full-qualified class name of the | ||
| 229 | * TransportService implementation. A TransportService is a concrete | ||
| 230 | * sub-class of {@link com.sun.jdi.connect.spi.TransportService | ||
| 231 | * TransportService}. The format of the provider configuration file | ||
| 232 | * is the same as the provider configuration file for Connectors | ||
| 233 | * except that each class listed must be the fully-qualified class | ||
| 234 | * name of a class that implements the TransportService interface. | ||
| 235 | * | ||
| 236 | * <p> For each TransportService installed on the platform, the | ||
| 237 | * VirtualMachineManager creates a corresponding | ||
| 238 | * {@link com.sun.jdi.connect.AttachingConnector} and | ||
| 239 | * {@link com.sun.jdi.connect.ListeningConnector}. These | ||
| 240 | * Connectors are created to encapsulate a {@link | ||
| 241 | * com.sun.jdi.connect.Transport Transport} that in turn | ||
| 242 | * encapsulates the TransportService. | ||
| 243 | * The AttachingConnector will be named based on the name of the | ||
| 244 | * transport service concatenated with the string <tt>Attach</tt>. | ||
| 245 | * For example, if the transport service {@link | ||
| 246 | * com.sun.jdi.connect.spi.TransportService#name() name()} method | ||
| 247 | * returns <tt>telepathic</tt> then the AttachingConnector will | ||
| 248 | * be named <tt>telepathicAttach</tt>. Similiarly the ListeningConnector | ||
| 249 | * will be named with the string <tt>Listen</tt> tagged onto the | ||
| 250 | * name of the transport service. The {@link | ||
| 251 | * com.sun.jdi.connect.Connector#description() description()} method | ||
| 252 | * of both the AttachingConnector, and the ListeningConnector, will | ||
| 253 | * delegate to the {@link com.sun.jdi.connect.spi.TransportService#description() | ||
| 254 | * description()} method of the underlying transport service. Both | ||
| 255 | * the AttachingConnector and the ListeningConnector will have two | ||
| 256 | * Connector {@link com.sun.jdi.connect.Connector$Argument Arguments}. | ||
| 257 | * A {@link com.sun.jdi.connect.Connector$StringArgument StringArgument} | ||
| 258 | * named <tt>address</tt> is the connector argument to specify the | ||
| 259 | * address to attach too, or to listen on. A | ||
| 260 | * {@link com.sun.jdi.connect.Connector$IntegerArgument IntegerArgument} | ||
| 261 | * named <tt>timeout</tt> is the connector argument to specify the | ||
| 262 | * timeout when attaching, or accepting. The timeout connector may be | ||
| 263 | * ignored depending on if the transport service supports an attach | ||
| 264 | * timeout or accept timeout. | ||
| 265 | * | ||
| 266 | * <p> Initialization of the virtual machine manager will fail, that is | ||
| 267 | * {@link com.sun.jdi.Bootstrap#virtualMachineManager()} will throw an | ||
| 268 | * error if the virtual machine manager is unable to create any | ||
| 269 | * connectors. | ||
| 270 | * | ||
| 271 | * @author Gordon Hirsch | ||
| 272 | * @since 1.3 | ||
| 273 | */ | ||
| 274 | public interface VirtualMachineManager { | ||
| 275 | |||
| 276 | /** | ||
| 277 | * Identifies the default connector. This connector should | ||
| 278 | * be used as the launching connector when selection of a | ||
| 279 | * connector with specific characteristics is unnecessary. | ||
| 280 | * | ||
| 281 | * @return the default {@link com.sun.jdi.connect.LaunchingConnector} | ||
| 282 | */ | ||
| 283 | LaunchingConnector defaultConnector(); | ||
| 284 | |||
| 285 | /** | ||
| 286 | * Returns the list of known {@link com.sun.jdi.connect.LaunchingConnector} objects. | ||
| 287 | * Any of the returned objects can be used to launch a new target | ||
| 288 | * VM and immediately create a {@link VirtualMachine} mirror for it. | ||
| 289 | * | ||
| 290 | * Note that a target VM launched by a launching connector is not | ||
| 291 | * guaranteed to be stable until after the {@link com.sun.jdi.event.VMStartEvent} has been | ||
| 292 | * received. | ||
| 293 | * @return a list of {@link com.sun.jdi.connect.LaunchingConnector} objects. | ||
| 294 | */ | ||
| 295 | List<LaunchingConnector> launchingConnectors(); | ||
| 296 | |||
| 297 | /** | ||
| 298 | * Returns the list of known {@link com.sun.jdi.connect.AttachingConnector} objects. | ||
| 299 | * Any of the returned objects can be used to attach to an existing target | ||
| 300 | * VM and create a {@link VirtualMachine} mirror for it. | ||
| 301 | * | ||
| 302 | * @return a list of {@link com.sun.jdi.connect.AttachingConnector} objects. | ||
| 303 | */ | ||
| 304 | List<AttachingConnector> attachingConnectors(); | ||
| 305 | |||
| 306 | /** | ||
| 307 | * Returns the list of known {@link com.sun.jdi.connect.ListeningConnector} objects. | ||
| 308 | * Any of the returned objects can be used to listen for a | ||
| 309 | * connection initiated by a target VM | ||
| 310 | * and create a {@link VirtualMachine} mirror for it. | ||
| 311 | * | ||
| 312 | * @return a list of {@link com.sun.jdi.connect.ListeningConnector} objects. | ||
| 313 | */ | ||
| 314 | List<ListeningConnector> listeningConnectors(); | ||
| 315 | |||
| 316 | /** | ||
| 317 | * Returns the list of all known {@link com.sun.jdi.connect.Connector} objects. | ||
| 318 | * | ||
| 319 | * @return a list of {@link com.sun.jdi.connect.Connector} objects. | ||
| 320 | */ | ||
| 321 | List<Connector> allConnectors(); | ||
| 322 | |||
| 323 | /** | ||
| 324 | * Lists all target VMs which are connected to the debugger. | ||
| 325 | * The list includes {@link VirtualMachine} instances for | ||
| 326 | * any target VMs which initiated a connection | ||
| 327 | * and any | ||
| 328 | * target VMs to which this manager has initiated a connection. | ||
| 329 | * A target VM will remain in this list | ||
| 330 | * until the VM is disconnected. | ||
| 331 | * {@link com.sun.jdi.event.VMDisconnectEvent} is placed in the event queue | ||
| 332 | * after the VM is removed from the list. | ||
| 333 | * | ||
| 334 | * @return a list of {@link VirtualMachine} objects, each mirroring | ||
| 335 | * a target VM. | ||
| 336 | */ | ||
| 337 | List<VirtualMachine> connectedVirtualMachines(); | ||
| 338 | |||
| 339 | /** | ||
| 340 | * Returns the major version number of the JDI interface. | ||
| 341 | * See {@link VirtualMachine#version} target VM version and | ||
| 342 | * information and | ||
| 343 | * {@link VirtualMachine#description} more version information. | ||
| 344 | * | ||
| 345 | * @return the integer major version number. | ||
| 346 | */ | ||
| 347 | int majorInterfaceVersion(); | ||
| 348 | |||
| 349 | /** | ||
| 350 | * Returns the minor version number of the JDI interface. | ||
| 351 | * See {@link VirtualMachine#version} target VM version and | ||
| 352 | * information and | ||
| 353 | * {@link VirtualMachine#description} more version information. | ||
| 354 | * | ||
| 355 | * @return the integer minor version number | ||
| 356 | */ | ||
| 357 | int minorInterfaceVersion(); | ||
| 358 | |||
| 359 | /** | ||
| 360 | * Create a virtual machine mirror for a target VM. | ||
| 361 | * | ||
| 362 | * <p> Creates a virtual machine mirror for a target VM | ||
| 363 | * for which a {@link com.sun.jdi.connect.spi.Connection Connection} | ||
| 364 | * already exists. A Connection is created when a {@link | ||
| 365 | * com.sun.jdi.connect.Connector Connector} establishes | ||
| 366 | * a connection and successfully handshakes with a target VM. | ||
| 367 | * A Connector can then use this method to create a virtual machine | ||
| 368 | * mirror to represent the composite state of the target VM. | ||
| 369 | * | ||
| 370 | * <p> The <tt>process</tt> argument specifies the | ||
| 371 | * {@link java.lang.Process} object for the taget VM. It may be | ||
| 372 | * specified as <tt>null</tt>. If the target VM is launched | ||
| 373 | * by a {@link com.sun.jdi.connect.LaunchingConnector | ||
| 374 | * LaunchingConnector} the <tt>process</tt> argument should be | ||
| 375 | * specified, otherwise calling {@link com.sun.jdi.VirtualMachine#process()} | ||
| 376 | * on the created virtual machine will return <tt>null</tt>. | ||
| 377 | * | ||
| 378 | * <p> This method exists so that Connectors may create | ||
| 379 | * a virtual machine mirror when a connection is established | ||
| 380 | * to a target VM. Only developers creating new Connector | ||
| 381 | * implementations should need to make direct use of this | ||
| 382 | * method. </p> | ||
| 383 | * | ||
| 384 | * @param connection | ||
| 385 | * The open connection to the target VM. | ||
| 386 | * | ||
| 387 | * @param process | ||
| 388 | * If launched, the {@link java.lang.Process} object for | ||
| 389 | * the target VM. <tt>null</tt> if not launched. | ||
| 390 | * | ||
| 391 | * @return new virtual machine representing the target VM. | ||
| 392 | * | ||
| 393 | * @throws IOException | ||
| 394 | * if an I/O error occurs | ||
| 395 | * | ||
| 396 | * @throws IllegalStateException | ||
| 397 | * if the connection is not open | ||
| 398 | * | ||
| 399 | * @see com.sun.jdi.connect.spi.Connection#isOpen() | ||
| 400 | * @see com.sun.jdi.VirtualMachine#process() | ||
| 401 | * | ||
| 402 | * @since 1.5 | ||
| 403 | */ | ||
| 404 | VirtualMachine createVirtualMachine(Connection connection, Process process) throws IOException; | ||
| 405 | |||
| 406 | /** | ||
| 407 | * Creates a new virtual machine. | ||
| 408 | * | ||
| 409 | * <p> This convenience method works as if by invoking {@link | ||
| 410 | * #createVirtualMachine(Connection, Process)} method and | ||
| 411 | * specifying <tt>null</tt> as the <tt>process</tt> argument. | ||
| 412 | * | ||
| 413 | * <p> This method exists so that Connectors may create | ||
| 414 | * a virtual machine mirror when a connection is established | ||
| 415 | * to a target VM. Only developers creating new Connector | ||
| 416 | * implementations should need to make direct use of this | ||
| 417 | * method. </p> | ||
| 418 | * | ||
| 419 | * @return the new virtual machine | ||
| 420 | * | ||
| 421 | * @throws IOException | ||
| 422 | * if an I/O error occurs | ||
| 423 | * | ||
| 424 | * @throws IllegalStateException | ||
| 425 | * if the connection is not open | ||
| 426 | * | ||
| 427 | * @since 1.5 | ||
| 428 | */ | ||
| 429 | VirtualMachine createVirtualMachine(Connection connection) throws IOException; | ||
| 430 | } | ||