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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.jdi; | ||
| 27 | |||
| 28 | import com.sun.jdi.*; | ||
| 29 | import com.sun.jdi.event.*; | ||
| 30 | import com.sun.jdi.request.*; | ||
| 31 | |||
| 32 | import java.util.*; | ||
| 33 | enum EventDestination {UNKNOWN_EVENT, INTERNAL_EVENT, CLIENT_EVENT}; | ||
| 34 | |||
| 35 | /* | ||
| 36 | * An EventSet is normally created by the transport reader thread when | ||
| 37 | * it reads a JDWP Composite command. The constructor doesn't unpack | ||
| 38 | * the events contained in the Composite command and create EventImpls | ||
| 39 | * for them because that process might involve calling back into the back-end | ||
| 40 | * which should not be done by the transport reader thread. Instead, | ||
| 41 | * the raw bytes of the packet are read and stored in the EventSet. | ||
| 42 | * The EventSet is then added to each EventQueue. When an EventSet is | ||
| 43 | * removed from an EventQueue, the EventSetImpl.build() method is called. | ||
| 44 | * This method reads the packet bytes and creates the actual EventImpl objects. | ||
| 45 | * build() also filters out events for our internal handler and puts them in | ||
| 46 | * their own EventSet. This means that the EventImpls that are in the EventSet | ||
| 47 | * that is on the queues are all for client requests. | ||
| 48 | */ | ||
| 49 | public class EventSetImpl extends ArrayList<Event> implements EventSet { | ||
| 50 | |||
| 51 | private VirtualMachineImpl vm; // we implement Mirror | ||
| 52 | private Packet pkt; | ||
| 53 | private byte suspendPolicy; | ||
| 54 | private EventSetImpl internalEventSet; | ||
| 55 | |||
| 56 | public String toString() { | ||
| 57 | String string = "event set, policy:" + suspendPolicy + | ||
| 58 | ", count:" + this.size() + " = {"; | ||
| 59 | boolean first = true; | ||
| 60 | for (Event event : this) { | ||
| 61 | if (!first) { | ||
| 62 | string += ", "; | ||
| 63 | } | ||
| 64 | string += event.toString(); | ||
| 65 | first = false; | ||
| 66 | } | ||
| 67 | string += "}"; | ||
| 68 | return string; | ||
| 69 | } | ||
| 70 | |||
| 71 | abstract class EventImpl extends MirrorImpl implements Event { | ||
| 72 | |||
| 73 | private final byte eventCmd; | ||
| 74 | private final int requestID; | ||
| 75 | // This is set only for client requests, not internal requests. | ||
| 76 | private final EventRequest request; | ||
| 77 | |||
| 78 | /** | ||
| 79 | * Constructor for events. | ||
| 80 | */ | ||
| 81 | protected EventImpl(JDWP.Event.Composite.Events.EventsCommon evt, | ||
| 82 | int requestID) { | ||
| 83 | super(EventSetImpl.this.vm); | ||
| 84 | this.eventCmd = evt.eventKind(); | ||
| 85 | this.requestID = requestID; | ||
| 86 | EventRequestManagerImpl ermi = EventSetImpl.this. | ||
| 87 | vm.eventRequestManagerImpl(); | ||
| 88 | this.request = ermi.request(eventCmd, requestID); | ||
| 89 | } | ||
| 90 | |||
| 91 | /* | ||
| 92 | * Override superclass back to default equality | ||
| 93 | */ | ||
| 94 | public boolean equals(Object obj) { | ||
| 95 | return this == obj; | ||
| 96 | } | ||
| 97 | |||
| 98 | public int hashCode() { | ||
| 99 | return System.identityHashCode(this); | ||
| 100 | } | ||
| 101 | |||
| 102 | /** | ||
| 103 | * Constructor for VM disconnected events. | ||
| 104 | */ | ||
| 105 | protected EventImpl(byte eventCmd) { | ||
| 106 | super(EventSetImpl.this.vm); | ||
| 107 | this.eventCmd = eventCmd; | ||
| 108 | this.requestID = 0; | ||
| 109 | this.request = null; | ||
| 110 | } | ||
| 111 | |||
| 112 | public EventRequest request() { | ||
| 113 | return request; | ||
| 114 | } | ||
| 115 | |||
| 116 | int requestID() { | ||
| 117 | return requestID; | ||
| 118 | } | ||
| 119 | |||
| 120 | EventDestination destination() { | ||
| 121 | /* | ||
| 122 | * We need to decide if this event is for | ||
| 123 | * 1. an internal request | ||
| 124 | * 2. a client request that is no longer available, ie | ||
| 125 | * it has been deleted, or disabled and re-enabled | ||
| 126 | * which gives it a new ID. | ||
| 127 | * 3. a current client request that is disabled | ||
| 128 | * 4. a current enabled client request. | ||
| 129 | * | ||
| 130 | * We will filter this set into a set | ||
| 131 | * that contains only 1s for our internal queue | ||
| 132 | * and a set that contains only 4s for our client queue. | ||
| 133 | * If we get an EventSet that contains only 2 and 3 | ||
| 134 | * then we have to resume it if it is not SUSPEND_NONE | ||
| 135 | * because no one else will. | ||
| 136 | */ | ||
| 137 | if (requestID == 0) { | ||
| 138 | /* An unsolicited event. These have traditionally | ||
| 139 | * been treated as client events. | ||
| 140 | */ | ||
| 141 | return EventDestination.CLIENT_EVENT; | ||
| 142 | } | ||
| 143 | |||
| 144 | // Is this an event for a current client request? | ||
| 145 | if (request == null) { | ||
| 146 | // Nope. Is it an event for an internal request? | ||
| 147 | EventRequestManagerImpl ermi = this.vm.getInternalEventRequestManager(); | ||
| 148 | if (ermi.request(eventCmd, requestID) != null) { | ||
| 149 | // Yep | ||
| 150 | return EventDestination.INTERNAL_EVENT; | ||
| 151 | } | ||
| 152 | return EventDestination.UNKNOWN_EVENT; | ||
| 153 | } | ||
| 154 | |||
| 155 | // We found a client request | ||
| 156 | if (request.isEnabled()) { | ||
| 157 | return EventDestination.CLIENT_EVENT; | ||
| 158 | } | ||
| 159 | return EventDestination.UNKNOWN_EVENT; | ||
| 160 | } | ||
| 161 | |||
| 162 | abstract String eventName(); | ||
| 163 | |||
| 164 | public String toString() { | ||
| 165 | return eventName(); | ||
| 166 | } | ||
| 167 | |||
| 168 | } | ||
| 169 | |||
| 170 | abstract class ThreadedEventImpl extends EventImpl { | ||
| 171 | private ThreadReference thread; | ||
| 172 | |||
| 173 | ThreadedEventImpl(JDWP.Event.Composite.Events.EventsCommon evt, | ||
| 174 | int requestID, ThreadReference thread) { | ||
| 175 | super(evt, requestID); | ||
| 176 | this.thread = thread; | ||
| 177 | } | ||
| 178 | |||
| 179 | public ThreadReference thread() { | ||
| 180 | return thread; | ||
| 181 | } | ||
| 182 | |||
| 183 | public String toString() { | ||
| 184 | return eventName() + " in thread " + thread.name(); | ||
| 185 | } | ||
| 186 | } | ||
| 187 | |||
| 188 | abstract class LocatableEventImpl extends ThreadedEventImpl | ||
| 189 | implements Locatable { | ||
| 190 | private Location location; | ||
| 191 | |||
| 192 | LocatableEventImpl(JDWP.Event.Composite.Events.EventsCommon evt, | ||
| 193 | int requestID, | ||
| 194 | ThreadReference thread, Location location) { | ||
| 195 | super(evt, requestID, thread); | ||
| 196 | this.location = location; | ||
| 197 | } | ||
| 198 | |||
| 199 | public Location location() { | ||
| 200 | return location; | ||
| 201 | } | ||
| 202 | |||
| 203 | /** | ||
| 204 | * For MethodEntry and MethodExit | ||
| 205 | */ | ||
| 206 | public Method method() { | ||
| 207 | return location.method(); | ||
| 208 | } | ||
| 209 | |||
| 210 | public String toString() { | ||
| 211 | return eventName() + "@" + | ||
| 212 | ((location() == null) ? " null" : location().toString()) + | ||
| 213 | " in thread " + thread().name(); | ||
| 214 | } | ||
| 215 | } | ||
| 216 | |||
| 217 | class BreakpointEventImpl extends LocatableEventImpl | ||
| 218 | implements BreakpointEvent { | ||
| 219 | BreakpointEventImpl(JDWP.Event.Composite.Events.Breakpoint evt) { | ||
| 220 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 221 | } | ||
| 222 | |||
| 223 | String eventName() { | ||
| 224 | return "BreakpointEvent"; | ||
| 225 | } | ||
| 226 | } | ||
| 227 | |||
| 228 | class StepEventImpl extends LocatableEventImpl implements StepEvent { | ||
| 229 | StepEventImpl(JDWP.Event.Composite.Events.SingleStep evt) { | ||
| 230 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 231 | } | ||
| 232 | |||
| 233 | String eventName() { | ||
| 234 | return "StepEvent"; | ||
| 235 | } | ||
| 236 | } | ||
| 237 | |||
| 238 | class MethodEntryEventImpl extends LocatableEventImpl | ||
| 239 | implements MethodEntryEvent { | ||
| 240 | MethodEntryEventImpl(JDWP.Event.Composite.Events.MethodEntry evt) { | ||
| 241 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 242 | } | ||
| 243 | |||
| 244 | String eventName() { | ||
| 245 | return "MethodEntryEvent"; | ||
| 246 | } | ||
| 247 | } | ||
| 248 | |||
| 249 | class MethodExitEventImpl extends LocatableEventImpl | ||
| 250 | implements MethodExitEvent { | ||
| 251 | private Value returnVal = null; | ||
| 252 | |||
| 253 | MethodExitEventImpl(JDWP.Event.Composite.Events.MethodExit evt) { | ||
| 254 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 255 | } | ||
| 256 | |||
| 257 | MethodExitEventImpl(JDWP.Event.Composite.Events.MethodExitWithReturnValue evt) { | ||
| 258 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 259 | returnVal = evt.value; | ||
| 260 | } | ||
| 261 | |||
| 262 | String eventName() { | ||
| 263 | return "MethodExitEvent"; | ||
| 264 | } | ||
| 265 | |||
| 266 | public Value returnValue() { | ||
| 267 | if (!this.vm.canGetMethodReturnValues()) { | ||
| 268 | throw new UnsupportedOperationException( | ||
| 269 | "target does not support return values in MethodExit events"); | ||
| 270 | } | ||
| 271 | return returnVal; | ||
| 272 | } | ||
| 273 | |||
| 274 | } | ||
| 275 | |||
| 276 | class MonitorContendedEnterEventImpl extends LocatableEventImpl | ||
| 277 | implements MonitorContendedEnterEvent { | ||
| 278 | private ObjectReference monitor = null; | ||
| 279 | |||
| 280 | MonitorContendedEnterEventImpl(JDWP.Event.Composite.Events.MonitorContendedEnter evt) { | ||
| 281 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 282 | this.monitor = evt.object; | ||
| 283 | } | ||
| 284 | |||
| 285 | String eventName() { | ||
| 286 | return "MonitorContendedEnter"; | ||
| 287 | } | ||
| 288 | |||
| 289 | public ObjectReference monitor() { | ||
| 290 | return monitor; | ||
| 291 | }; | ||
| 292 | |||
| 293 | } | ||
| 294 | |||
| 295 | class MonitorContendedEnteredEventImpl extends LocatableEventImpl | ||
| 296 | implements MonitorContendedEnteredEvent { | ||
| 297 | private ObjectReference monitor = null; | ||
| 298 | |||
| 299 | MonitorContendedEnteredEventImpl(JDWP.Event.Composite.Events.MonitorContendedEntered evt) { | ||
| 300 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 301 | this.monitor = evt.object; | ||
| 302 | } | ||
| 303 | |||
| 304 | String eventName() { | ||
| 305 | return "MonitorContendedEntered"; | ||
| 306 | } | ||
| 307 | |||
| 308 | public ObjectReference monitor() { | ||
| 309 | return monitor; | ||
| 310 | }; | ||
| 311 | |||
| 312 | } | ||
| 313 | |||
| 314 | class MonitorWaitEventImpl extends LocatableEventImpl | ||
| 315 | implements MonitorWaitEvent { | ||
| 316 | private ObjectReference monitor = null; | ||
| 317 | private long timeout; | ||
| 318 | |||
| 319 | MonitorWaitEventImpl(JDWP.Event.Composite.Events.MonitorWait evt) { | ||
| 320 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 321 | this.monitor = evt.object; | ||
| 322 | this.timeout = evt.timeout; | ||
| 323 | } | ||
| 324 | |||
| 325 | String eventName() { | ||
| 326 | return "MonitorWait"; | ||
| 327 | } | ||
| 328 | |||
| 329 | public ObjectReference monitor() { | ||
| 330 | return monitor; | ||
| 331 | }; | ||
| 332 | |||
| 333 | public long timeout() { | ||
| 334 | return timeout; | ||
| 335 | } | ||
| 336 | } | ||
| 337 | |||
| 338 | class MonitorWaitedEventImpl extends LocatableEventImpl | ||
| 339 | implements MonitorWaitedEvent { | ||
| 340 | private ObjectReference monitor = null; | ||
| 341 | private boolean timed_out; | ||
| 342 | |||
| 343 | MonitorWaitedEventImpl(JDWP.Event.Composite.Events.MonitorWaited evt) { | ||
| 344 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 345 | this.monitor = evt.object; | ||
| 346 | this.timed_out = evt.timed_out; | ||
| 347 | } | ||
| 348 | |||
| 349 | String eventName() { | ||
| 350 | return "MonitorWaited"; | ||
| 351 | } | ||
| 352 | |||
| 353 | public ObjectReference monitor() { | ||
| 354 | return monitor; | ||
| 355 | }; | ||
| 356 | |||
| 357 | public boolean timedout() { | ||
| 358 | return timed_out; | ||
| 359 | } | ||
| 360 | } | ||
| 361 | |||
| 362 | class ClassPrepareEventImpl extends ThreadedEventImpl | ||
| 363 | implements ClassPrepareEvent { | ||
| 364 | private ReferenceType referenceType; | ||
| 365 | |||
| 366 | ClassPrepareEventImpl(JDWP.Event.Composite.Events.ClassPrepare evt) { | ||
| 367 | super(evt, evt.requestID, evt.thread); | ||
| 368 | referenceType = this.vm.referenceType(evt.typeID, evt.refTypeTag, | ||
| 369 | evt.signature); | ||
| 370 | ((ReferenceTypeImpl)referenceType).setStatus(evt.status); | ||
| 371 | } | ||
| 372 | |||
| 373 | public ReferenceType referenceType() { | ||
| 374 | return referenceType; | ||
| 375 | } | ||
| 376 | |||
| 377 | String eventName() { | ||
| 378 | return "ClassPrepareEvent"; | ||
| 379 | } | ||
| 380 | } | ||
| 381 | |||
| 382 | class ClassUnloadEventImpl extends EventImpl implements ClassUnloadEvent { | ||
| 383 | private String classSignature; | ||
| 384 | |||
| 385 | ClassUnloadEventImpl(JDWP.Event.Composite.Events.ClassUnload evt) { | ||
| 386 | super(evt, evt.requestID); | ||
| 387 | this.classSignature = evt.signature; | ||
| 388 | } | ||
| 389 | |||
| 390 | public String className() { | ||
| 391 | return classSignature.substring(1, classSignature.length()-1) | ||
| 392 | .replace('/', '.'); | ||
| 393 | } | ||
| 394 | |||
| 395 | public String classSignature() { | ||
| 396 | return classSignature; | ||
| 397 | } | ||
| 398 | |||
| 399 | String eventName() { | ||
| 400 | return "ClassUnloadEvent"; | ||
| 401 | } | ||
| 402 | } | ||
| 403 | |||
| 404 | class ExceptionEventImpl extends LocatableEventImpl | ||
| 405 | implements ExceptionEvent { | ||
| 406 | private ObjectReference exception; | ||
| 407 | private Location catchLocation; | ||
| 408 | |||
| 409 | ExceptionEventImpl(JDWP.Event.Composite.Events.Exception evt) { | ||
| 410 | super(evt, evt.requestID, evt.thread, evt.location); | ||
| 411 | this.exception = evt.exception; | ||
| 412 | this.catchLocation = evt.catchLocation; | ||
| 413 | } | ||
| 414 | |||
| 415 | public ObjectReference exception() { | ||
| 416 | return exception; | ||
| 417 | } | ||
| 418 | |||
| 419 | public Location catchLocation() { | ||
| 420 | return catchLocation; | ||
| 421 | } | ||
| 422 | |||
| 423 | String eventName() { | ||
| 424 | return "ExceptionEvent"; | ||
| 425 | } | ||
| 426 | } | ||
| 427 | |||
| 428 | class ThreadDeathEventImpl extends ThreadedEventImpl | ||
| 429 | implements ThreadDeathEvent { | ||
| 430 | ThreadDeathEventImpl(JDWP.Event.Composite.Events.ThreadDeath evt) { | ||
| 431 | super(evt, evt.requestID, evt.thread); | ||
| 432 | } | ||
| 433 | |||
| 434 | String eventName() { | ||
| 435 | return "ThreadDeathEvent"; | ||
| 436 | } | ||
| 437 | } | ||
| 438 | |||
| 439 | class ThreadStartEventImpl extends ThreadedEventImpl | ||
| 440 | implements ThreadStartEvent { | ||
| 441 | ThreadStartEventImpl(JDWP.Event.Composite.Events.ThreadStart evt) { | ||
| 442 | super(evt, evt.requestID, evt.thread); | ||
| 443 | } | ||
| 444 | |||
| 445 | String eventName() { | ||
| 446 | return "ThreadStartEvent"; | ||
| 447 | } | ||
| 448 | } | ||
| 449 | |||
| 450 | class VMStartEventImpl extends ThreadedEventImpl | ||
| 451 | implements VMStartEvent { | ||
| 452 | VMStartEventImpl(JDWP.Event.Composite.Events.VMStart evt) { | ||
| 453 | super(evt, evt.requestID, evt.thread); | ||
| 454 | } | ||
| 455 | |||
| 456 | String eventName() { | ||
| 457 | return "VMStartEvent"; | ||
| 458 | } | ||
| 459 | } | ||
| 460 | |||
| 461 | class VMDeathEventImpl extends EventImpl implements VMDeathEvent { | ||
| 462 | |||
| 463 | VMDeathEventImpl(JDWP.Event.Composite.Events.VMDeath evt) { | ||
| 464 | super(evt, evt.requestID); | ||
| 465 | } | ||
| 466 | |||
| 467 | String eventName() { | ||
| 468 | return "VMDeathEvent"; | ||
| 469 | } | ||
| 470 | } | ||
| 471 | |||
| 472 | class VMDisconnectEventImpl extends EventImpl | ||
| 473 | implements VMDisconnectEvent { | ||
| 474 | |||
| 475 | VMDisconnectEventImpl() { | ||
| 476 | super((byte)JDWP.EventKind.VM_DISCONNECTED); | ||
| 477 | } | ||
| 478 | |||
| 479 | String eventName() { | ||
| 480 | return "VMDisconnectEvent"; | ||
| 481 | } | ||
| 482 | } | ||
| 483 | |||
| 484 | abstract class WatchpointEventImpl extends LocatableEventImpl | ||
| 485 | implements WatchpointEvent { | ||
| 486 | private final ReferenceTypeImpl refType; | ||
| 487 | private final long fieldID; | ||
| 488 | private final ObjectReference object; | ||
| 489 | private Field field = null; | ||
| 490 | |||
| 491 | WatchpointEventImpl(JDWP.Event.Composite.Events.EventsCommon evt, | ||
| 492 | int requestID, | ||
| 493 | ThreadReference thread, Location location, | ||
| 494 | byte refTypeTag, long typeID, long fieldID, | ||
| 495 | ObjectReference object) { | ||
| 496 | super(evt, requestID, thread, location); | ||
| 497 | this.refType = this.vm.referenceType(typeID, refTypeTag); | ||
| 498 | this.fieldID = fieldID; | ||
| 499 | this.object = object; | ||
| 500 | } | ||
| 501 | |||
| 502 | public Field field() { | ||
| 503 | if (field == null) { | ||
| 504 | field = refType.getFieldMirror(fieldID); | ||
| 505 | } | ||
| 506 | return field; | ||
| 507 | } | ||
| 508 | |||
| 509 | public ObjectReference object() { | ||
| 510 | return object; | ||
| 511 | } | ||
| 512 | |||
| 513 | public Value valueCurrent() { | ||
| 514 | if (object == null) { | ||
| 515 | return refType.getValue(field()); | ||
| 516 | } else { | ||
| 517 | return object.getValue(field()); | ||
| 518 | } | ||
| 519 | } | ||
| 520 | } | ||
| 521 | |||
| 522 | class AccessWatchpointEventImpl extends WatchpointEventImpl | ||
| 523 | implements AccessWatchpointEvent { | ||
| 524 | |||
| 525 | AccessWatchpointEventImpl(JDWP.Event.Composite.Events.FieldAccess evt) { | ||
| 526 | super(evt, evt.requestID, evt.thread, evt.location, | ||
| 527 | evt.refTypeTag, evt.typeID, evt.fieldID, evt.object); | ||
| 528 | } | ||
| 529 | |||
| 530 | String eventName() { | ||
| 531 | return "AccessWatchpoint"; | ||
| 532 | } | ||
| 533 | } | ||
| 534 | |||
| 535 | class ModificationWatchpointEventImpl extends WatchpointEventImpl | ||
| 536 | implements ModificationWatchpointEvent { | ||
| 537 | Value newValue; | ||
| 538 | |||
| 539 | ModificationWatchpointEventImpl( | ||
| 540 | JDWP.Event.Composite.Events.FieldModification evt) { | ||
| 541 | super(evt, evt.requestID, evt.thread, evt.location, | ||
| 542 | evt.refTypeTag, evt.typeID, evt.fieldID, evt.object); | ||
| 543 | this.newValue = evt.valueToBe; | ||
| 544 | } | ||
| 545 | |||
| 546 | public Value valueToBe() { | ||
| 547 | return newValue; | ||
| 548 | } | ||
| 549 | |||
| 550 | String eventName() { | ||
| 551 | return "ModificationWatchpoint"; | ||
| 552 | } | ||
| 553 | } | ||
| 554 | |||
| 555 | /** | ||
| 556 | * Events are constructed on the thread which reads all data from the | ||
| 557 | * transport. This means that the packet cannot be converted to real | ||
| 558 | * JDI objects as that may involve further communications with the | ||
| 559 | * back end which would deadlock. | ||
| 560 | * | ||
| 561 | * Hence the {@link #build()} method below called by EventQueue. | ||
| 562 | */ | ||
| 563 | EventSetImpl(VirtualMachine aVm, Packet pkt) { | ||
| 564 | super(); | ||
| 565 | |||
| 566 | // From "MirrorImpl": | ||
| 567 | // Yes, its a bit of a hack. But by doing it this | ||
| 568 | // way, this is the only place we have to change | ||
| 569 | // typing to substitute a new impl. | ||
| 570 | vm = (VirtualMachineImpl)aVm; | ||
| 571 | |||
| 572 | this.pkt = pkt; | ||
| 573 | } | ||
| 574 | |||
| 575 | /** | ||
| 576 | * Constructor for special events like VM disconnected | ||
| 577 | */ | ||
| 578 | EventSetImpl(VirtualMachine aVm, byte eventCmd) { | ||
| 579 | this(aVm, null); | ||
| 580 | suspendPolicy = JDWP.SuspendPolicy.NONE; | ||
| 581 | switch (eventCmd) { | ||
| 582 | case JDWP.EventKind.VM_DISCONNECTED: | ||
| 583 | addEvent(new VMDisconnectEventImpl()); | ||
| 584 | break; | ||
| 585 | |||
| 586 | default: | ||
| 587 | throw new InternalException("Bad singleton event code"); | ||
| 588 | } | ||
| 589 | } | ||
| 590 | |||
| 591 | private void addEvent(EventImpl evt) { | ||
| 592 | // Note that this class has a public add method that throws | ||
| 593 | // an exception so that clients can't modify the EventSet | ||
| 594 | super.add(evt); | ||
| 595 | } | ||
| 596 | |||
| 597 | /* | ||
| 598 | * Complete the construction of an EventSet. This is called from | ||
| 599 | * an event handler thread. It upacks the JDWP events inside | ||
| 600 | * the packet and creates EventImpls for them. The EventSet is already | ||
| 601 | * on EventQueues when this is called, so it has to be synch. | ||
| 602 | */ | ||
| 603 | synchronized void build() { | ||
| 604 | if (pkt == null) { | ||
| 605 | return; | ||
| 606 | } | ||
| 607 | PacketStream ps = new PacketStream(vm, pkt); | ||
| 608 | JDWP.Event.Composite compEvt = new JDWP.Event.Composite(vm, ps); | ||
| 609 | suspendPolicy = compEvt.suspendPolicy; | ||
| 610 | if ((vm.traceFlags & vm.TRACE_EVENTS) != 0) { | ||
| 611 | switch(suspendPolicy) { | ||
| 612 | case JDWP.SuspendPolicy.ALL: | ||
| 613 | vm.printTrace("EventSet: SUSPEND_ALL"); | ||
| 614 | break; | ||
| 615 | |||
| 616 | case JDWP.SuspendPolicy.EVENT_THREAD: | ||
| 617 | vm.printTrace("EventSet: SUSPEND_EVENT_THREAD"); | ||
| 618 | break; | ||
| 619 | |||
| 620 | case JDWP.SuspendPolicy.NONE: | ||
| 621 | vm.printTrace("EventSet: SUSPEND_NONE"); | ||
| 622 | break; | ||
| 623 | } | ||
| 624 | } | ||
| 625 | |||
| 626 | ThreadReference fix6485605 = null; | ||
| 627 | for (int i = 0; i < compEvt.events.length; i++) { | ||
| 628 | EventImpl evt = createEvent(compEvt.events[i]); | ||
| 629 | if ((vm.traceFlags & vm.TRACE_EVENTS) != 0) { | ||
| 630 | try { | ||
| 631 | vm.printTrace("Event: " + evt); | ||
| 632 | } catch (VMDisconnectedException ee) { | ||
| 633 | // ignore - see bug 6502716 | ||
| 634 | } | ||
| 635 | } | ||
| 636 | |||
| 637 | switch (evt.destination()) { | ||
| 638 | case UNKNOWN_EVENT: | ||
| 639 | // Ignore disabled, deleted, unknown events, but | ||
| 640 | // save the thread if there is one since we might | ||
| 641 | // have to resume it. Note that events for different | ||
| 642 | // threads can't be in the same event set. | ||
| 643 | if (evt instanceof ThreadedEventImpl && | ||
| 644 | suspendPolicy == JDWP.SuspendPolicy.EVENT_THREAD) { | ||
| 645 | fix6485605 = ((ThreadedEventImpl)evt).thread(); | ||
| 646 | } | ||
| 647 | continue; | ||
| 648 | case CLIENT_EVENT: | ||
| 649 | addEvent(evt); | ||
| 650 | break; | ||
| 651 | case INTERNAL_EVENT: | ||
| 652 | if (internalEventSet == null) { | ||
| 653 | internalEventSet = new EventSetImpl(this.vm, null); | ||
| 654 | } | ||
| 655 | internalEventSet.addEvent(evt); | ||
| 656 | break; | ||
| 657 | default: | ||
| 658 | throw new InternalException("Invalid event destination"); | ||
| 659 | } | ||
| 660 | } | ||
| 661 | pkt = null; // No longer needed - free it up | ||
| 662 | |||
| 663 | // Avoid hangs described in 6296125, 6293795 | ||
| 664 | if (super.size() == 0) { | ||
| 665 | // This set has no client events. If we don't do | ||
| 666 | // needed resumes, no one else is going to. | ||
| 667 | if (suspendPolicy == JDWP.SuspendPolicy.ALL) { | ||
| 668 | vm.resume(); | ||
| 669 | } else if (suspendPolicy == JDWP.SuspendPolicy.EVENT_THREAD) { | ||
| 670 | // See bug 6485605. | ||
| 671 | if (fix6485605 != null) { | ||
| 672 | fix6485605.resume(); | ||
| 673 | } else { | ||
| 674 | // apparently, there is nothing to resume. | ||
| 675 | } | ||
| 676 | } | ||
| 677 | suspendPolicy = JDWP.SuspendPolicy.NONE; | ||
| 678 | |||
| 679 | } | ||
| 680 | |||
| 681 | } | ||
| 682 | |||
| 683 | /** | ||
| 684 | * Filter out internal events | ||
| 685 | */ | ||
| 686 | EventSet userFilter() { | ||
| 687 | return this; | ||
| 688 | } | ||
| 689 | |||
| 690 | /** | ||
| 691 | * Filter out user events. | ||
| 692 | */ | ||
| 693 | EventSet internalFilter() { | ||
| 694 | return this.internalEventSet; | ||
| 695 | } | ||
| 696 | |||
| 697 | EventImpl createEvent(JDWP.Event.Composite.Events evt) { | ||
| 698 | JDWP.Event.Composite.Events.EventsCommon comm = evt.aEventsCommon; | ||
| 699 | switch (evt.eventKind) { | ||
| 700 | case JDWP.EventKind.THREAD_START: | ||
| 701 | return new ThreadStartEventImpl( | ||
| 702 | (JDWP.Event.Composite.Events.ThreadStart)comm); | ||
| 703 | |||
| 704 | case JDWP.EventKind.THREAD_END: | ||
| 705 | return new ThreadDeathEventImpl( | ||
| 706 | (JDWP.Event.Composite.Events.ThreadDeath)comm); | ||
| 707 | |||
| 708 | case JDWP.EventKind.EXCEPTION: | ||
| 709 | return new ExceptionEventImpl( | ||
| 710 | (JDWP.Event.Composite.Events.Exception)comm); | ||
| 711 | |||
| 712 | case JDWP.EventKind.BREAKPOINT: | ||
| 713 | return new BreakpointEventImpl( | ||
| 714 | (JDWP.Event.Composite.Events.Breakpoint)comm); | ||
| 715 | |||
| 716 | case JDWP.EventKind.METHOD_ENTRY: | ||
| 717 | return new MethodEntryEventImpl( | ||
| 718 | (JDWP.Event.Composite.Events.MethodEntry)comm); | ||
| 719 | |||
| 720 | case JDWP.EventKind.METHOD_EXIT: | ||
| 721 | return new MethodExitEventImpl( | ||
| 722 | (JDWP.Event.Composite.Events.MethodExit)comm); | ||
| 723 | |||
| 724 | case JDWP.EventKind.METHOD_EXIT_WITH_RETURN_VALUE: | ||
| 725 | return new MethodExitEventImpl( | ||
| 726 | (JDWP.Event.Composite.Events.MethodExitWithReturnValue)comm); | ||
| 727 | |||
| 728 | case JDWP.EventKind.FIELD_ACCESS: | ||
| 729 | return new AccessWatchpointEventImpl( | ||
| 730 | (JDWP.Event.Composite.Events.FieldAccess)comm); | ||
| 731 | |||
| 732 | case JDWP.EventKind.FIELD_MODIFICATION: | ||
| 733 | return new ModificationWatchpointEventImpl( | ||
| 734 | (JDWP.Event.Composite.Events.FieldModification)comm); | ||
| 735 | |||
| 736 | case JDWP.EventKind.SINGLE_STEP: | ||
| 737 | return new StepEventImpl( | ||
| 738 | (JDWP.Event.Composite.Events.SingleStep)comm); | ||
| 739 | |||
| 740 | case JDWP.EventKind.CLASS_PREPARE: | ||
| 741 | return new ClassPrepareEventImpl( | ||
| 742 | (JDWP.Event.Composite.Events.ClassPrepare)comm); | ||
| 743 | |||
| 744 | case JDWP.EventKind.CLASS_UNLOAD: | ||
| 745 | return new ClassUnloadEventImpl( | ||
| 746 | (JDWP.Event.Composite.Events.ClassUnload)comm); | ||
| 747 | |||
| 748 | case JDWP.EventKind.MONITOR_CONTENDED_ENTER: | ||
| 749 | return new MonitorContendedEnterEventImpl( | ||
| 750 | (JDWP.Event.Composite.Events.MonitorContendedEnter)comm); | ||
| 751 | |||
| 752 | case JDWP.EventKind.MONITOR_CONTENDED_ENTERED: | ||
| 753 | return new MonitorContendedEnteredEventImpl( | ||
| 754 | (JDWP.Event.Composite.Events.MonitorContendedEntered)comm); | ||
| 755 | |||
| 756 | case JDWP.EventKind.MONITOR_WAIT: | ||
| 757 | return new MonitorWaitEventImpl( | ||
| 758 | (JDWP.Event.Composite.Events.MonitorWait)comm); | ||
| 759 | |||
| 760 | case JDWP.EventKind.MONITOR_WAITED: | ||
| 761 | return new MonitorWaitedEventImpl( | ||
| 762 | (JDWP.Event.Composite.Events.MonitorWaited)comm); | ||
| 763 | |||
| 764 | case JDWP.EventKind.VM_START: | ||
| 765 | return new VMStartEventImpl( | ||
| 766 | (JDWP.Event.Composite.Events.VMStart)comm); | ||
| 767 | |||
| 768 | case JDWP.EventKind.VM_DEATH: | ||
| 769 | return new VMDeathEventImpl( | ||
| 770 | (JDWP.Event.Composite.Events.VMDeath)comm); | ||
| 771 | |||
| 772 | default: | ||
| 773 | // Ignore unknown event types | ||
| 774 | System.err.println("Ignoring event cmd " + | ||
| 775 | evt.eventKind + " from the VM"); | ||
| 776 | return null; | ||
| 777 | } | ||
| 778 | } | ||
| 779 | |||
| 780 | public VirtualMachine virtualMachine() { | ||
| 781 | return vm; | ||
| 782 | } | ||
| 783 | |||
| 784 | public int suspendPolicy() { | ||
| 785 | return EventRequestManagerImpl.JDWPtoJDISuspendPolicy(suspendPolicy); | ||
| 786 | } | ||
| 787 | |||
| 788 | private ThreadReference eventThread() { | ||
| 789 | for (Event event : this) { | ||
| 790 | if (event instanceof ThreadedEventImpl) { | ||
| 791 | return ((ThreadedEventImpl)event).thread(); | ||
| 792 | } | ||
| 793 | } | ||
| 794 | return null; | ||
| 795 | } | ||
| 796 | |||
| 797 | public void resume() { | ||
| 798 | switch (suspendPolicy()) { | ||
| 799 | case EventRequest.SUSPEND_ALL: | ||
| 800 | vm.resume(); | ||
| 801 | break; | ||
| 802 | case EventRequest.SUSPEND_EVENT_THREAD: | ||
| 803 | ThreadReference thread = eventThread(); | ||
| 804 | if (thread == null) { | ||
| 805 | throw new InternalException("Inconsistent suspend policy"); | ||
| 806 | } | ||
| 807 | thread.resume(); | ||
| 808 | break; | ||
| 809 | case EventRequest.SUSPEND_NONE: | ||
| 810 | // Do nothing | ||
| 811 | break; | ||
| 812 | default: | ||
| 813 | throw new InternalException("Invalid suspend policy"); | ||
| 814 | } | ||
| 815 | } | ||
| 816 | |||
| 817 | public Iterator<Event> iterator() { | ||
| 818 | return new Itr(); | ||
| 819 | } | ||
| 820 | |||
| 821 | public EventIterator eventIterator() { | ||
| 822 | return new Itr(); | ||
| 823 | } | ||
| 824 | |||
| 825 | public class Itr implements EventIterator { | ||
| 826 | /** | ||
| 827 | * Index of element to be returned by subsequent call to next. | ||
| 828 | */ | ||
| 829 | int cursor = 0; | ||
| 830 | |||
| 831 | public boolean hasNext() { | ||
| 832 | return cursor != size(); | ||
| 833 | } | ||
| 834 | |||
| 835 | public Event next() { | ||
| 836 | try { | ||
| 837 | Event nxt = get(cursor); | ||
| 838 | ++cursor; | ||
| 839 | return nxt; | ||
| 840 | } catch(IndexOutOfBoundsException e) { | ||
| 841 | throw new NoSuchElementException(); | ||
| 842 | } | ||
| 843 | } | ||
| 844 | |||
| 845 | public Event nextEvent() { | ||
| 846 | return next(); | ||
| 847 | } | ||
| 848 | |||
| 849 | public void remove() { | ||
| 850 | throw new UnsupportedOperationException(); | ||
| 851 | } | ||
| 852 | } | ||
| 853 | |||
| 854 | /* below make this unmodifiable */ | ||
| 855 | |||
| 856 | public boolean add(Event o){ | ||
| 857 | throw new UnsupportedOperationException(); | ||
| 858 | } | ||
| 859 | public boolean remove(Object o) { | ||
| 860 | throw new UnsupportedOperationException(); | ||
| 861 | } | ||
| 862 | public boolean addAll(Collection<? extends Event> coll) { | ||
| 863 | throw new UnsupportedOperationException(); | ||
| 864 | } | ||
| 865 | public boolean removeAll(Collection<?> coll) { | ||
| 866 | throw new UnsupportedOperationException(); | ||
| 867 | } | ||
| 868 | public boolean retainAll(Collection<?> coll) { | ||
| 869 | throw new UnsupportedOperationException(); | ||
| 870 | } | ||
| 871 | public void clear() { | ||
| 872 | throw new UnsupportedOperationException(); | ||
| 873 | } | ||
| 874 | } | ||