1 /*
2 * Copyright (c) 1998, 2024, 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 java.lang.ref.Reference;
29 import java.lang.ref.ReferenceQueue;
30 import java.lang.ref.SoftReference;
31 import java.text.MessageFormat;
32 import java.util.ArrayList;
33 import java.util.Arrays;
34 import java.util.Collections;
35 import java.util.HashMap;
36 import java.util.HashSet;
37 import java.util.Iterator;
38 import java.util.List;
39 import java.util.Map;
40 import java.util.Set;
41 import java.util.function.Consumer;
42
43 import com.sun.jdi.BooleanType;
44 import com.sun.jdi.BooleanValue;
45 import com.sun.jdi.ByteType;
46 import com.sun.jdi.ByteValue;
47 import com.sun.jdi.CharType;
48 import com.sun.jdi.CharValue;
49 import com.sun.jdi.ClassNotLoadedException;
50 import com.sun.jdi.DoubleType;
51 import com.sun.jdi.DoubleValue;
52 import com.sun.jdi.FloatType;
53 import com.sun.jdi.FloatValue;
54 import com.sun.jdi.IntegerType;
55 import com.sun.jdi.IntegerValue;
56 import com.sun.jdi.InternalException;
57 import com.sun.jdi.LongType;
58 import com.sun.jdi.LongValue;
59 import com.sun.jdi.ModuleReference;
60 import com.sun.jdi.ObjectCollectedException;
61 import com.sun.jdi.PathSearchingVirtualMachine;
62 import com.sun.jdi.PrimitiveType;
63 import com.sun.jdi.ReferenceType;
64 import com.sun.jdi.ShortType;
65 import com.sun.jdi.ShortValue;
66 import com.sun.jdi.StringReference;
67 import com.sun.jdi.ThreadGroupReference;
68 import com.sun.jdi.ThreadReference;
69 import com.sun.jdi.Type;
70 import com.sun.jdi.VMDisconnectedException;
71 import com.sun.jdi.VirtualMachine;
72 import com.sun.jdi.VirtualMachineManager;
73 import com.sun.jdi.VoidType;
74 import com.sun.jdi.VoidValue;
75 import com.sun.jdi.connect.spi.Connection;
76 import com.sun.jdi.event.EventQueue;
77 import com.sun.jdi.request.BreakpointRequest;
78 import com.sun.jdi.request.EventRequest;
79 import com.sun.jdi.request.EventRequestManager;
80
81 class VirtualMachineImpl extends MirrorImpl
82 implements PathSearchingVirtualMachine, ThreadListener {
83 // VM Level exported variables, these
84 // are unique to a given vm
85 public final int sizeofFieldRef;
86 public final int sizeofMethodRef;
87 public final int sizeofObjectRef;
88 public final int sizeofClassRef;
89 public final int sizeofFrameRef;
90 public final int sizeofModuleRef;
91
92 final int sequenceNumber;
93
94 private final TargetVM target;
95 private final EventQueueImpl eventQueue;
96 private final EventRequestManagerImpl internalEventRequestManager;
97 private final EventRequestManagerImpl eventRequestManager;
98 final VirtualMachineManagerImpl vmManager;
99 private final ThreadGroup threadGroupForJDI;
100
101 // Allow direct access to this field so that that tracing code slows down
102 // JDI as little as possible when not enabled.
103 int traceFlags = TRACE_NONE;
104
105 static int TRACE_RAW_SENDS = 0x01000000;
106 static int TRACE_RAW_RECEIVES = 0x02000000;
107
108 boolean traceReceives = false; // pre-compute because of frequency
109
110 // ReferenceType access - updated with class prepare and unload events
111 // Protected by "synchronized(this)". "retrievedAllTypes" may be
112 // tested unsynchronized (since once true, it stays true), but must
113 // be set synchronously
114 private Map<Long, ReferenceType> typesByID;
115 private Set<ReferenceType> typesBySignature;
116 private boolean retrievedAllTypes = false;
117
118 private Map<Long, ModuleReference> modulesByID;
119
120 // For other languages support
121 private String defaultStratum = null;
122
123 // ObjectReference cache
124 // "objectsByID" protected by "synchronized(this)".
125 private final Map<Long, SoftObjectReference> objectsByID = new HashMap<>();
126 private final ReferenceQueue<ObjectReferenceImpl> referenceQueue = new ReferenceQueue<>();
127 private static final int DISPOSE_THRESHOLD = 50;
128 private final List<SoftObjectReference> batchedDisposeRequests =
129 Collections.synchronizedList(new ArrayList<>(DISPOSE_THRESHOLD + 10));
130
131 // These are cached once for the life of the VM
132 private JDWP.VirtualMachine.Version versionInfo;
133 private JDWP.VirtualMachine.ClassPaths pathInfo;
134 private JDWP.VirtualMachine.Capabilities capabilities = null;
135 private JDWP.VirtualMachine.CapabilitiesNew capabilitiesNew = null;
136
137 // Per-vm singletons for primitive types and for void.
138 // singleton-ness protected by "synchronized(this)".
139 private BooleanType theBooleanType;
140 private ByteType theByteType;
141 private CharType theCharType;
142 private ShortType theShortType;
143 private IntegerType theIntegerType;
144 private LongType theLongType;
145 private FloatType theFloatType;
146 private DoubleType theDoubleType;
147
148 private VoidType theVoidType;
149
150 private VoidValue voidVal;
151
152 // Launched debuggee process
153 private Process process;
154
155 // coordinates state changes and corresponding listener notifications
156 private VMState state = new VMState(this);
157
158 private Object initMonitor = new Object();
159 private boolean initComplete = false;
160 private boolean shutdown = false;
161
162 private void notifyInitCompletion() {
163 synchronized(initMonitor) {
164 initComplete = true;
165 initMonitor.notifyAll();
166 }
167 }
168
169 void waitInitCompletion() {
170 synchronized(initMonitor) {
171 while (!initComplete) {
172 try {
173 initMonitor.wait();
174 } catch (InterruptedException e) {
175 // ignore
176 }
177 }
178 }
179 }
180
181 VMState state() {
182 return state;
183 }
184
185 /*
186 * ThreadListener implementation
187 */
188 public boolean threadResumable(ThreadAction action) {
189 /*
190 * If any thread is resumed, the VM is considered not suspended.
191 * Just one thread is being resumed so pass it to thaw.
192 */
193 state.thaw(action.thread());
194 return true;
195 }
196
197 VirtualMachineImpl(VirtualMachineManager manager,
198 Connection connection, Process process,
199 int sequenceNumber) {
200 super(null); // Can't use super(this)
201 vm = this;
202
203 this.vmManager = (VirtualMachineManagerImpl)manager;
204 this.process = process;
205 this.sequenceNumber = sequenceNumber;
206
207 /* Create ThreadGroup to be used by all threads servicing
208 * this VM.
209 */
210 threadGroupForJDI = new ThreadGroup(vmManager.mainGroupForJDI(),
211 "JDI [" +
212 this.hashCode() + "]");
213
214 /*
215 * Set up a thread to communicate with the target VM over
216 * the specified transport.
217 */
218 target = new TargetVM(this, connection);
219
220 /*
221 * Set up a thread to handle events processed internally
222 * the JDI implementation.
223 */
224 EventQueueImpl internalEventQueue = new EventQueueImpl(this, target);
225 new InternalEventHandler(this, internalEventQueue);
226 /*
227 * Initialize client access to event setting and handling
228 */
229 eventQueue = new EventQueueImpl(this, target);
230 eventRequestManager = new EventRequestManagerImpl(this);
231
232 target.start();
233
234 /*
235 * Many ids are variably sized, depending on target VM.
236 * Find out the sizes right away.
237 */
238 JDWP.VirtualMachine.IDSizes idSizes;
239 try {
240 idSizes = JDWP.VirtualMachine.IDSizes.process(vm);
241 } catch (JDWPException exc) {
242 throw exc.toJDIException();
243 }
244 sizeofFieldRef = idSizes.fieldIDSize;
245 sizeofMethodRef = idSizes.methodIDSize;
246 sizeofObjectRef = idSizes.objectIDSize;
247 sizeofClassRef = idSizes.referenceTypeIDSize;
248 sizeofFrameRef = idSizes.frameIDSize;
249 sizeofModuleRef = idSizes.objectIDSize;
250
251 /**
252 * Set up requests needed by internal event handler.
253 * Make sure they are distinguished by creating them with
254 * an internal event request manager.
255 *
256 * Warning: create events only with SUSPEND_NONE policy.
257 * In the current implementation other policies will not
258 * be handled correctly when the event comes in. (notfiySuspend()
259 * will not be properly called, and if the event is combined
260 * with external events in the same set, suspend policy is not
261 * correctly determined for the internal vs. external event sets)
262 */
263 internalEventRequestManager = new EventRequestManagerImpl(this);
264 EventRequest er = internalEventRequestManager.createClassPrepareRequest();
265 er.setSuspendPolicy(EventRequest.SUSPEND_NONE);
266 er.enable();
267 er = internalEventRequestManager.createClassUnloadRequest();
268 er.setSuspendPolicy(EventRequest.SUSPEND_NONE);
269 er.enable();
270
271 /*
272 * Tell other threads, notably TargetVM, that initialization
273 * is complete.
274 */
275 notifyInitCompletion();
276 }
277
278 EventRequestManagerImpl getInternalEventRequestManager() {
279 return internalEventRequestManager;
280 }
281
282 void validateVM() {
283 /*
284 * We no longer need to do this. The spec now says
285 * that a VMDisconnected _may_ be thrown in these
286 * cases, not that it _will_ be thrown.
287 * So, to simplify things we will just let the
288 * caller's of this method proceed with their business.
289 * If the debuggee is disconnected, either because it
290 * crashed or finished or something, or because the
291 * debugger called exit() or dispose(), then if
292 * we end up trying to communicate with the debuggee,
293 * code in TargetVM will throw a VMDisconnectedException.
294 * This means that if we can satisfy a request without
295 * talking to the debuggee, (eg, with cached data) then
296 * VMDisconnectedException will _not_ be thrown.
297 * if (shutdown) {
298 * throw new VMDisconnectedException();
299 * }
300 */
301 }
302
303 public boolean equals(Object obj) {
304 return this == obj;
305 }
306
307 public int hashCode() {
308 return System.identityHashCode(this);
309 }
310
311 public List<ModuleReference> allModules() {
312 validateVM();
313 List<ModuleReference> modules = retrieveAllModules();
314 return Collections.unmodifiableList(modules);
315 }
316
317 public List<ReferenceType> classesByName(String className) {
318 validateVM();
319 return classesBySignature(JNITypeParser.typeNameToSignature(className));
320 }
321
322 List<ReferenceType> classesBySignature(String signature) {
323 validateVM();
324 List<ReferenceType> list;
325 if (retrievedAllTypes) {
326 list = findReferenceTypes(signature);
327 } else {
328 list = retrieveClassesBySignature(signature);
329 }
330 return Collections.unmodifiableList(list);
331 }
332
333 public List<ReferenceType> allClasses() {
334 validateVM();
335
336 if (!retrievedAllTypes) {
337 retrieveAllClasses();
338 }
339 ArrayList<ReferenceType> a;
340 synchronized (this) {
341 a = new ArrayList<>(typesBySignature);
342 }
343 return Collections.unmodifiableList(a);
344 }
345
346 /**
347 * Performs an action for each loaded type.
348 */
349 public void forEachClass(Consumer<ReferenceType> action) {
350 for (ReferenceType type : allClasses()) {
351 try {
352 action.accept(type);
353 } catch (ObjectCollectedException ex) {
354 // Some classes might be unloaded and garbage collected since
355 // we retrieved the copy of all loaded classes and started
356 // iterating over them. In this case calling methods on such types
357 // might result in com.sun.jdi.ObjectCollectedException
358 // being thrown. We ignore such classes and keep iterating.
359 if ((vm.traceFlags & VirtualMachine.TRACE_OBJREFS) != 0) {
360 vm.printTrace("ObjectCollectedException was thrown while " +
361 "accessing unloaded class " + type.name());
362 }
363 }
364 }
365 }
366
367 public void
368 redefineClasses(Map<? extends ReferenceType, byte[]> classToBytes)
369 {
370 int cnt = classToBytes.size();
371 JDWP.VirtualMachine.RedefineClasses.ClassDef[] defs =
372 new JDWP.VirtualMachine.RedefineClasses.ClassDef[cnt];
373 validateVM();
374 if (!canRedefineClasses()) {
375 throw new UnsupportedOperationException();
376 }
377 Iterator<?> it = classToBytes.entrySet().iterator();
378 for (int i = 0; it.hasNext(); i++) {
379 Map.Entry<?, ?> entry = (Map.Entry)it.next();
380 ReferenceTypeImpl refType = (ReferenceTypeImpl)entry.getKey();
381 validateMirror(refType);
382 defs[i] = new JDWP.VirtualMachine.RedefineClasses
383 .ClassDef(refType, (byte[])entry.getValue());
384 }
385
386 // flush caches and disable caching until the next suspend
387 vm.state().thaw();
388
389 try {
390 JDWP.VirtualMachine.RedefineClasses.
391 process(vm, defs);
392 } catch (JDWPException exc) {
393 switch (exc.errorCode()) {
394 case JDWP.Error.INVALID_CLASS_FORMAT :
395 throw new ClassFormatError(
396 "class not in class file format");
397 case JDWP.Error.CIRCULAR_CLASS_DEFINITION :
398 throw new ClassCircularityError(
399 "circularity has been detected while initializing a class");
400 case JDWP.Error.FAILS_VERIFICATION :
401 throw new VerifyError(
402 "verifier detected internal inconsistency or security problem");
403 case JDWP.Error.UNSUPPORTED_VERSION :
404 throw new UnsupportedClassVersionError(
405 "version numbers of class are not supported");
406 case JDWP.Error.ADD_METHOD_NOT_IMPLEMENTED:
407 throw new UnsupportedOperationException(
408 "add method not implemented");
409 case JDWP.Error.SCHEMA_CHANGE_NOT_IMPLEMENTED :
410 throw new UnsupportedOperationException(
411 "schema change not implemented");
412 case JDWP.Error.HIERARCHY_CHANGE_NOT_IMPLEMENTED:
413 throw new UnsupportedOperationException(
414 "hierarchy change not implemented");
415 case JDWP.Error.DELETE_METHOD_NOT_IMPLEMENTED :
416 throw new UnsupportedOperationException(
417 "delete method not implemented");
418 case JDWP.Error.CLASS_MODIFIERS_CHANGE_NOT_IMPLEMENTED:
419 throw new UnsupportedOperationException(
420 "changes to class modifiers not implemented");
421 case JDWP.Error.METHOD_MODIFIERS_CHANGE_NOT_IMPLEMENTED :
422 throw new UnsupportedOperationException(
423 "changes to method modifiers not implemented");
424 case JDWP.Error.CLASS_ATTRIBUTE_CHANGE_NOT_IMPLEMENTED :
425 throw new UnsupportedOperationException(
426 "changes to class attribute not implemented");
427 case JDWP.Error.NAMES_DONT_MATCH :
428 throw new NoClassDefFoundError(
429 "class names do not match");
430 default:
431 throw exc.toJDIException();
432 }
433 }
434
435 // Delete any record of the breakpoints
436 List<BreakpointRequest> toDelete = new ArrayList<>();
437 EventRequestManager erm = eventRequestManager();
438 it = erm.breakpointRequests().iterator();
439 while (it.hasNext()) {
440 BreakpointRequest req = (BreakpointRequest)it.next();
441 if (classToBytes.containsKey(req.location().declaringType())) {
442 toDelete.add(req);
443 }
444 }
445 erm.deleteEventRequests(toDelete);
446
447 // Invalidate any information cached for the classes just redefined.
448 it = classToBytes.keySet().iterator();
449 while (it.hasNext()) {
450 ReferenceTypeImpl rti = (ReferenceTypeImpl)it.next();
451 rti.noticeRedefineClass();
452 }
453 }
454
455 public List<ThreadReference> allThreads() {
456 validateVM();
457 return state.allThreads();
458 }
459
460 public List<ThreadGroupReference> topLevelThreadGroups() {
461 validateVM();
462 return state.topLevelThreadGroups();
463 }
464
465 /*
466 * Sends a command to the back end which is defined to do an
467 * implicit vm-wide resume. The VM can no longer be considered
468 * suspended, so certain cached data must be invalidated.
469 */
470 PacketStream sendResumingCommand(CommandSender sender) {
471 return state.thawCommand(sender);
472 }
473
474 /*
475 * The VM has been suspended. Additional caching can be done
476 * as long as there are no pending resumes.
477 */
478 void notifySuspend() {
479 state.freeze();
480 }
481
482 public void suspend() {
483 validateVM();
484 try {
485 JDWP.VirtualMachine.Suspend.process(vm);
486 } catch (JDWPException exc) {
487 throw exc.toJDIException();
488 }
489 notifySuspend();
490 }
491
492 public void resume() {
493 validateVM();
494 CommandSender sender =
495 new CommandSender() {
496 public PacketStream send() {
497 return JDWP.VirtualMachine.Resume.enqueueCommand(vm);
498 }
499 };
500 try {
501 PacketStream stream = state.thawCommand(sender);
502 JDWP.VirtualMachine.Resume.waitForReply(vm, stream);
503 } catch (VMDisconnectedException exc) {
504 /*
505 * If the debugger makes a VMDeathRequest with SUSPEND_ALL,
506 * then when it does an EventSet.resume after getting the
507 * VMDeathEvent, the normal flow of events is that the
508 * BE shuts down, but the waitForReply comes back ok. In this
509 * case, the run loop in TargetVM that is waiting for a packet
510 * gets an EOF because the socket closes. It generates a
511 * VMDisconnectedEvent and everyone is happy.
512 * However, sometimes, the BE gets shutdown before this
513 * waitForReply completes. In this case, TargetVM.waitForReply
514 * gets awakened with no reply and so gens a VMDisconnectedException
515 * which is not what we want. It might be possible to fix this
516 * in the BE, but it is ok to just ignore the VMDisconnectedException
517 * here. This will allow the VMDisconnectedEvent to be generated
518 * correctly. And, if the debugger should happen to make another
519 * request, it will get a VMDisconnectedException at that time.
520 */
521 } catch (JDWPException exc) {
522 switch (exc.errorCode()) {
523 case JDWP.Error.VM_DEAD:
524 return;
525 default:
526 throw exc.toJDIException();
527 }
528 }
529 }
530
531 public EventQueue eventQueue() {
532 /*
533 * No VM validation here. We allow access to the event queue
534 * after disconnection, so that there is access to the terminating
535 * events.
536 */
537 return eventQueue;
538 }
539
540 public EventRequestManager eventRequestManager() {
541 validateVM();
542 return eventRequestManager;
543 }
544
545 EventRequestManagerImpl eventRequestManagerImpl() {
546 return eventRequestManager;
547 }
548
549 public BooleanValue mirrorOf(boolean value) {
550 validateVM();
551 return new BooleanValueImpl(this,value);
552 }
553
554 public ByteValue mirrorOf(byte value) {
555 validateVM();
556 return new ByteValueImpl(this,value);
557 }
558
559 public CharValue mirrorOf(char value) {
560 validateVM();
561 return new CharValueImpl(this,value);
562 }
563
564 public ShortValue mirrorOf(short value) {
565 validateVM();
566 return new ShortValueImpl(this,value);
567 }
568
569 public IntegerValue mirrorOf(int value) {
570 validateVM();
571 return new IntegerValueImpl(this,value);
572 }
573
574 public LongValue mirrorOf(long value) {
575 validateVM();
576 return new LongValueImpl(this,value);
577 }
578
579 public FloatValue mirrorOf(float value) {
580 validateVM();
581 return new FloatValueImpl(this,value);
582 }
583
584 public DoubleValue mirrorOf(double value) {
585 validateVM();
586 return new DoubleValueImpl(this,value);
587 }
588
589 public StringReference mirrorOf(String value) {
590 validateVM();
591 try {
592 return JDWP.VirtualMachine.CreateString.
593 process(vm, value).stringObject;
594 } catch (JDWPException exc) {
595 throw exc.toJDIException();
596 }
597 }
598
599 public VoidValue mirrorOfVoid() {
600 if (voidVal == null) {
601 voidVal = new VoidValueImpl(this);
602 }
603 return voidVal;
604 }
605
606 public long[] instanceCounts(List<? extends ReferenceType> classes) {
607 if (!canGetInstanceInfo()) {
608 throw new UnsupportedOperationException(
609 "target does not support getting instances");
610 }
611 long[] retValue ;
612 ReferenceTypeImpl[] rtArray = new ReferenceTypeImpl[classes.size()];
613 int ii = 0;
614 for (ReferenceType rti: classes) {
615 validateMirror(rti);
616 rtArray[ii++] = (ReferenceTypeImpl)rti;
617 }
618 try {
619 retValue = JDWP.VirtualMachine.InstanceCounts.
620 process(vm, rtArray).counts;
621 } catch (JDWPException exc) {
622 throw exc.toJDIException();
623 }
624
625 return retValue;
626 }
627
628 public void dispose() {
629 validateVM();
630 shutdown = true;
631 try {
632 JDWP.VirtualMachine.Dispose.process(vm);
633 } catch (JDWPException exc) {
634 throw exc.toJDIException();
635 }
636 target.stopListening();
637 }
638
639 public void exit(int exitCode) {
640 validateVM();
641 shutdown = true;
642 try {
643 JDWP.VirtualMachine.Exit.process(vm, exitCode);
644 } catch (JDWPException exc) {
645 throw exc.toJDIException();
646 }
647 target.stopListening();
648 }
649
650 public Process process() {
651 validateVM();
652 return process;
653 }
654
655 private JDWP.VirtualMachine.Version versionInfo() {
656 try {
657 if (versionInfo == null) {
658 // Need not be synchronized since it is static information
659 versionInfo = JDWP.VirtualMachine.Version.process(vm);
660 }
661 return versionInfo;
662 } catch (JDWPException exc) {
663 throw exc.toJDIException();
664 }
665 }
666
667 public String description() {
668 validateVM();
669
670 return MessageFormat.format(vmManager.getString("version_format"),
671 "" + vmManager.majorInterfaceVersion(),
672 "" + vmManager.minorInterfaceVersion(),
673 versionInfo().description);
674 }
675
676 public String version() {
677 validateVM();
678 return versionInfo().vmVersion;
679 }
680
681 public String name() {
682 validateVM();
683 return versionInfo().vmName;
684 }
685
686 public boolean canWatchFieldModification() {
687 validateVM();
688 return capabilities().canWatchFieldModification;
689 }
690
691 public boolean canWatchFieldAccess() {
692 validateVM();
693 return capabilities().canWatchFieldAccess;
694 }
695
696 public boolean canGetBytecodes() {
697 validateVM();
698 return capabilities().canGetBytecodes;
699 }
700
701 public boolean canGetSyntheticAttribute() {
702 validateVM();
703 return capabilities().canGetSyntheticAttribute;
704 }
705
706 public boolean canGetOwnedMonitorInfo() {
707 validateVM();
708 return capabilities().canGetOwnedMonitorInfo;
709 }
710
711 public boolean canGetCurrentContendedMonitor() {
712 validateVM();
713 return capabilities().canGetCurrentContendedMonitor;
714 }
715
716 public boolean canGetMonitorInfo() {
717 validateVM();
718 return capabilities().canGetMonitorInfo;
719 }
720
721 private boolean hasNewCapabilities() {
722 return versionInfo().jdwpMajor > 1 ||
723 versionInfo().jdwpMinor >= 4;
724 }
725
726 boolean canGet1_5LanguageFeatures() {
727 return versionInfo().jdwpMajor > 1 ||
728 versionInfo().jdwpMinor >= 5;
729 }
730
731 public boolean canUseInstanceFilters() {
732 validateVM();
733 return hasNewCapabilities() &&
734 capabilitiesNew().canUseInstanceFilters;
735 }
736
737 public boolean canRedefineClasses() {
738 validateVM();
739 return hasNewCapabilities() &&
740 capabilitiesNew().canRedefineClasses;
741 }
742
743 @Deprecated(since="15")
744 public boolean canAddMethod() {
745 validateVM();
746 return hasNewCapabilities() &&
747 capabilitiesNew().canAddMethod;
748 }
749
750 @Deprecated(since="15")
751 public boolean canUnrestrictedlyRedefineClasses() {
752 validateVM();
753 return hasNewCapabilities() &&
754 capabilitiesNew().canUnrestrictedlyRedefineClasses;
755 }
756
757 public boolean canPopFrames() {
758 validateVM();
759 return hasNewCapabilities() &&
760 capabilitiesNew().canPopFrames;
761 }
762
763 public boolean canGetMethodReturnValues() {
764 return versionInfo().jdwpMajor > 1 ||
765 versionInfo().jdwpMinor >= 6;
766 }
767
768 public boolean canGetInstanceInfo() {
769 if (versionInfo().jdwpMajor > 1 ||
770 versionInfo().jdwpMinor >= 6) {
771 validateVM();
772 return hasNewCapabilities() &&
773 capabilitiesNew().canGetInstanceInfo;
774 } else {
775 return false;
776 }
777 }
778
779 public boolean canUseSourceNameFilters() {
780 return versionInfo().jdwpMajor > 1 ||
781 versionInfo().jdwpMinor >= 6;
782 }
783
784 public boolean canForceEarlyReturn() {
785 validateVM();
786 return hasNewCapabilities() &&
787 capabilitiesNew().canForceEarlyReturn;
788 }
789
790 public boolean canBeModified() {
791 return true;
792 }
793
794 public boolean canGetSourceDebugExtension() {
795 validateVM();
796 return hasNewCapabilities() &&
797 capabilitiesNew().canGetSourceDebugExtension;
798 }
799
800 public boolean canGetClassFileVersion() {
801 return versionInfo().jdwpMajor > 1 ||
802 versionInfo().jdwpMinor >= 6;
803 }
804
805 public boolean canGetConstantPool() {
806 validateVM();
807 return hasNewCapabilities() &&
808 capabilitiesNew().canGetConstantPool;
809 }
810
811 public boolean canRequestVMDeathEvent() {
812 validateVM();
813 return hasNewCapabilities() &&
814 capabilitiesNew().canRequestVMDeathEvent;
815 }
816
817 public boolean canRequestMonitorEvents() {
818 validateVM();
819 return hasNewCapabilities() &&
820 capabilitiesNew().canRequestMonitorEvents;
821 }
822
823 public boolean canGetMonitorFrameInfo() {
824 validateVM();
825 return hasNewCapabilities() &&
826 capabilitiesNew().canGetMonitorFrameInfo;
827 }
828
829 public boolean canGetModuleInfo() {
830 validateVM();
831 return versionInfo().jdwpMajor >= 9;
832 }
833
834 boolean mayCreateVirtualThreads() {
835 return versionInfo().jdwpMajor >= 19;
836 }
837
838 public void setDebugTraceMode(int traceFlags) {
839 validateVM();
840 this.traceFlags = traceFlags;
841 this.traceReceives = (traceFlags & TRACE_RECEIVES) != 0;
842 }
843
844 void printTrace(String string) {
845 System.err.println("[JDI: " + string + "]");
846 }
847
848 void printReceiveTrace(int depth, String string) {
849 StringBuilder sb = new StringBuilder("Receiving:");
850 for (int i = depth; i > 0; --i) {
851 sb.append(" ");
852 }
853 sb.append(string);
854 printTrace(sb.toString());
855 }
856
857 private synchronized ReferenceTypeImpl addReferenceType(long id,
858 int tag,
859 String signature) {
860 if (typesByID == null) {
861 initReferenceTypes();
862 }
863 ReferenceTypeImpl type = null;
864 switch(tag) {
865 case JDWP.TypeTag.CLASS:
866 type = new ClassTypeImpl(vm, id);
867 break;
868 case JDWP.TypeTag.INTERFACE:
869 type = new InterfaceTypeImpl(vm, id);
870 break;
871 case JDWP.TypeTag.ARRAY:
872 type = new ArrayTypeImpl(vm, id);
873 break;
874 default:
875 throw new InternalException("Invalid reference type tag");
876 }
877
878 if (signature == null && retrievedAllTypes) {
879 // do not cache if signature is not provided
880 return type;
881 }
882
883 typesByID.put(id, type);
884 typesBySignature.add(type);
885
886 if ((vm.traceFlags & VirtualMachine.TRACE_REFTYPES) != 0) {
887 vm.printTrace("Caching new ReferenceType, sig=" + signature +
888 ", id=" + id);
889 }
890
891 return type;
892 }
893
894 synchronized void removeReferenceType(String signature) {
895 if (typesByID == null) {
896 return;
897 }
898 /*
899 * There can be multiple classes with the same name. Since
900 * we can't differentiate here, we first remove all
901 * matching classes from our cache...
902 */
903 Iterator<ReferenceType> iter = typesBySignature.iterator();
904 int matches = 0;
905 while (iter.hasNext()) {
906 ReferenceTypeImpl type = (ReferenceTypeImpl)iter.next();
907 int comp = signature.compareTo(type.signature());
908 if (comp == 0) {
909 matches++;
910 iter.remove();
911 typesByID.remove(type.ref());
912 if ((vm.traceFlags & VirtualMachine.TRACE_REFTYPES) != 0) {
913 vm.printTrace("Uncaching ReferenceType, sig=" + signature +
914 ", id=" + type.ref());
915 }
916 // fix for 4359077, don't break out. list is no longer sorted
917 // in the order we think
918 }
919 }
920
921 /*
922 * ...and if there was more than one, re-retrieve the classes
923 * with that name
924 */
925 if (matches > 1) {
926 retrieveClassesBySignature(signature);
927 }
928 }
929
930 private synchronized List<ReferenceType> findReferenceTypes(String signature) {
931 if (typesByID == null) {
932 return new ArrayList<>(0);
933 }
934 Iterator<ReferenceType> iter = typesBySignature.iterator();
935 List<ReferenceType> list = new ArrayList<>();
936 while (iter.hasNext()) {
937 ReferenceTypeImpl type = (ReferenceTypeImpl)iter.next();
938 int comp = signature.compareTo(type.signature());
939 if (comp == 0) {
940 list.add(type);
941 // fix for 4359077, don't break out. list is no longer sorted
942 // in the order we think
943 }
944 }
945 return list;
946 }
947
948 private void initReferenceTypes() {
949 typesByID = new HashMap<>(300);
950 typesBySignature = new HashSet<>();
951 }
952
953 ReferenceTypeImpl referenceType(long ref, byte tag) {
954 return referenceType(ref, tag, null);
955 }
956
957 ClassTypeImpl classType(long ref) {
958 return (ClassTypeImpl)referenceType(ref, JDWP.TypeTag.CLASS, null);
959 }
960
961 InterfaceTypeImpl interfaceType(long ref) {
962 return (InterfaceTypeImpl)referenceType(ref, JDWP.TypeTag.INTERFACE, null);
963 }
964
965 ArrayTypeImpl arrayType(long ref) {
966 return (ArrayTypeImpl)referenceType(ref, JDWP.TypeTag.ARRAY, null);
967 }
968
969 ReferenceTypeImpl referenceType(long id, int tag, String signature) {
970 if ((vm.traceFlags & VirtualMachine.TRACE_REFTYPES) != 0) {
971 StringBuilder sb = new StringBuilder();
972 sb.append("Looking up ");
973 if (tag == JDWP.TypeTag.CLASS) {
974 sb.append("Class");
975 } else if (tag == JDWP.TypeTag.INTERFACE) {
976 sb.append("Interface");
977 } else if (tag == JDWP.TypeTag.ARRAY) {
978 sb.append("ArrayType");
979 } else {
980 sb.append("UNKNOWN TAG: ").append(tag);
981 }
982 if (signature != null) {
983 sb.append(", signature='").append(signature).append('\'');
984 }
985 sb.append(", id=").append(id);
986 vm.printTrace(sb.toString());
987 }
988 if (id == 0) {
989 return null;
990 } else {
991 ReferenceTypeImpl retType = null;
992 synchronized (this) {
993 if (typesByID != null) {
994 retType = (ReferenceTypeImpl)typesByID.get(id);
995 }
996 if (retType == null) {
997 retType = addReferenceType(id, tag, signature);
998 }
999 if (signature != null) {
1000 retType.setSignature(signature);
1001 }
1002 }
1003 return retType;
1004 }
1005 }
1006
1007 private JDWP.VirtualMachine.Capabilities capabilities() {
1008 if (capabilities == null) {
1009 try {
1010 capabilities = JDWP.VirtualMachine
1011 .Capabilities.process(vm);
1012 } catch (JDWPException exc) {
1013 throw exc.toJDIException();
1014 }
1015 }
1016 return capabilities;
1017 }
1018
1019 private JDWP.VirtualMachine.CapabilitiesNew capabilitiesNew() {
1020 if (capabilitiesNew == null) {
1021 try {
1022 capabilitiesNew = JDWP.VirtualMachine
1023 .CapabilitiesNew.process(vm);
1024 } catch (JDWPException exc) {
1025 throw exc.toJDIException();
1026 }
1027 }
1028 return capabilitiesNew;
1029 }
1030
1031 private synchronized ModuleReference addModule(long id) {
1032 if (modulesByID == null) {
1033 modulesByID = new HashMap<>(77);
1034 }
1035 ModuleReference module = new ModuleReferenceImpl(vm, id);
1036 modulesByID.put(id, module);
1037 return module;
1038 }
1039
1040 ModuleReference getModule(long id) {
1041 if (id == 0) {
1042 return null;
1043 } else {
1044 ModuleReference module = null;
1045 synchronized (this) {
1046 if (modulesByID != null) {
1047 module = modulesByID.get(id);
1048 }
1049 if (module == null) {
1050 module = addModule(id);
1051 }
1052 }
1053 return module;
1054 }
1055 }
1056
1057 private synchronized List<ModuleReference> retrieveAllModules() {
1058 ModuleReferenceImpl[] reqModules;
1059 try {
1060 reqModules = JDWP.VirtualMachine.AllModules.process(vm).modules;
1061 } catch (JDWPException exc) {
1062 throw exc.toJDIException();
1063 }
1064 ArrayList<ModuleReference> modules = new ArrayList<>();
1065 for (int i = 0; i < reqModules.length; i++) {
1066 long moduleRef = reqModules[i].ref();
1067 ModuleReference module = getModule(moduleRef);
1068 modules.add(module);
1069 }
1070 return modules;
1071 }
1072
1073 private List<ReferenceType> retrieveClassesBySignature(String signature) {
1074 if ((vm.traceFlags & VirtualMachine.TRACE_REFTYPES) != 0) {
1075 vm.printTrace("Retrieving matching ReferenceTypes, sig=" + signature);
1076 }
1077 JDWP.VirtualMachine.ClassesBySignature.ClassInfo[] cinfos;
1078 try {
1079 cinfos = JDWP.VirtualMachine.ClassesBySignature.
1080 process(vm, signature).classes;
1081 } catch (JDWPException exc) {
1082 throw exc.toJDIException();
1083 }
1084
1085 int count = cinfos.length;
1086 List<ReferenceType> list = new ArrayList<>(count);
1087
1088 // Hold lock during processing to improve performance
1089 synchronized (this) {
1090 for (int i = 0; i < count; i++) {
1091 JDWP.VirtualMachine.ClassesBySignature.ClassInfo ci =
1092 cinfos[i];
1093 ReferenceTypeImpl type = referenceType(ci.typeID,
1094 ci.refTypeTag,
1095 signature);
1096 type.setStatus(ci.status);
1097 list.add(type);
1098 }
1099 }
1100 return list;
1101 }
1102
1103 private void retrieveAllClasses1_4() {
1104 JDWP.VirtualMachine.AllClasses.ClassInfo[] cinfos;
1105 try {
1106 cinfos = JDWP.VirtualMachine.AllClasses.process(vm).classes;
1107 } catch (JDWPException exc) {
1108 throw exc.toJDIException();
1109 }
1110
1111 // Hold lock during processing to improve performance
1112 // and to have safe check/set of retrievedAllTypes
1113 synchronized (this) {
1114 if (!retrievedAllTypes) {
1115 // Number of classes
1116 int count = cinfos.length;
1117 for (int i = 0; i < count; i++) {
1118 JDWP.VirtualMachine.AllClasses.ClassInfo ci = cinfos[i];
1119 ReferenceTypeImpl type = referenceType(ci.typeID,
1120 ci.refTypeTag,
1121 ci.signature);
1122 type.setStatus(ci.status);
1123 }
1124 retrievedAllTypes = true;
1125 }
1126 }
1127 }
1128
1129 private void retrieveAllClasses() {
1130 if ((vm.traceFlags & VirtualMachine.TRACE_REFTYPES) != 0) {
1131 vm.printTrace("Retrieving all ReferenceTypes");
1132 }
1133
1134 if (!vm.canGet1_5LanguageFeatures()) {
1135 retrieveAllClasses1_4();
1136 return;
1137 }
1138
1139 /*
1140 * To save time (assuming the caller will be
1141 * using then) we will get the generic sigs too.
1142 */
1143 JDWP.VirtualMachine.AllClassesWithGeneric.ClassInfo[] cinfos;
1144 try {
1145 cinfos = JDWP.VirtualMachine.AllClassesWithGeneric.process(vm).classes;
1146 } catch (JDWPException exc) {
1147 throw exc.toJDIException();
1148 }
1149
1150 // Hold lock during processing to improve performance
1151 // and to have safe check/set of retrievedAllTypes
1152 synchronized (this) {
1153 if (!retrievedAllTypes) {
1154 // Number of classes
1155 int count = cinfos.length;
1156 for (int i = 0; i < count; i++) {
1157 JDWP.VirtualMachine.AllClassesWithGeneric.ClassInfo ci =
1158 cinfos[i];
1159 ReferenceTypeImpl type = referenceType(ci.typeID,
1160 ci.refTypeTag,
1161 ci.signature);
1162 type.setGenericSignature(ci.genericSignature);
1163 type.setStatus(ci.status);
1164 }
1165 retrievedAllTypes = true;
1166 }
1167 }
1168 }
1169
1170 void sendToTarget(Packet packet) {
1171 target.send(packet);
1172 }
1173
1174 void waitForTargetReply(Packet packet) {
1175 target.waitForReply(packet);
1176 /*
1177 * If any object disposes have been batched up, send them now.
1178 */
1179 processBatchedDisposes();
1180 }
1181
1182 Type findBootType(String signature) throws ClassNotLoadedException {
1183 List<ReferenceType> types = retrieveClassesBySignature(signature);
1184 for (ReferenceType type : types) {
1185 if (type.classLoader() == null) {
1186 return type;
1187 }
1188 }
1189 JNITypeParser parser = new JNITypeParser(signature);
1190 throw new ClassNotLoadedException(parser.typeName(),
1191 "Type " + parser.typeName() + " not loaded");
1192 }
1193
1194 BooleanType theBooleanType() {
1195 if (theBooleanType == null) {
1196 synchronized(this) {
1197 if (theBooleanType == null) {
1198 theBooleanType = new BooleanTypeImpl(this);
1199 }
1200 }
1201 }
1202 return theBooleanType;
1203 }
1204
1205 ByteType theByteType() {
1206 if (theByteType == null) {
1207 synchronized(this) {
1208 if (theByteType == null) {
1209 theByteType = new ByteTypeImpl(this);
1210 }
1211 }
1212 }
1213 return theByteType;
1214 }
1215
1216 CharType theCharType() {
1217 if (theCharType == null) {
1218 synchronized(this) {
1219 if (theCharType == null) {
1220 theCharType = new CharTypeImpl(this);
1221 }
1222 }
1223 }
1224 return theCharType;
1225 }
1226
1227 ShortType theShortType() {
1228 if (theShortType == null) {
1229 synchronized(this) {
1230 if (theShortType == null) {
1231 theShortType = new ShortTypeImpl(this);
1232 }
1233 }
1234 }
1235 return theShortType;
1236 }
1237
1238 IntegerType theIntegerType() {
1239 if (theIntegerType == null) {
1240 synchronized(this) {
1241 if (theIntegerType == null) {
1242 theIntegerType = new IntegerTypeImpl(this);
1243 }
1244 }
1245 }
1246 return theIntegerType;
1247 }
1248
1249 LongType theLongType() {
1250 if (theLongType == null) {
1251 synchronized(this) {
1252 if (theLongType == null) {
1253 theLongType = new LongTypeImpl(this);
1254 }
1255 }
1256 }
1257 return theLongType;
1258 }
1259
1260 FloatType theFloatType() {
1261 if (theFloatType == null) {
1262 synchronized(this) {
1263 if (theFloatType == null) {
1264 theFloatType = new FloatTypeImpl(this);
1265 }
1266 }
1267 }
1268 return theFloatType;
1269 }
1270
1271 DoubleType theDoubleType() {
1272 if (theDoubleType == null) {
1273 synchronized(this) {
1274 if (theDoubleType == null) {
1275 theDoubleType = new DoubleTypeImpl(this);
1276 }
1277 }
1278 }
1279 return theDoubleType;
1280 }
1281
1282 VoidType theVoidType() {
1283 if (theVoidType == null) {
1284 synchronized(this) {
1285 if (theVoidType == null) {
1286 theVoidType = new VoidTypeImpl(this);
1287 }
1288 }
1289 }
1290 return theVoidType;
1291 }
1292
1293 PrimitiveType primitiveTypeMirror(byte tag) {
1294 switch (tag) {
1295 case JDWP.Tag.BOOLEAN:
1296 return theBooleanType();
1297 case JDWP.Tag.BYTE:
1298 return theByteType();
1299 case JDWP.Tag.CHAR:
1300 return theCharType();
1301 case JDWP.Tag.SHORT:
1302 return theShortType();
1303 case JDWP.Tag.INT:
1304 return theIntegerType();
1305 case JDWP.Tag.LONG:
1306 return theLongType();
1307 case JDWP.Tag.FLOAT:
1308 return theFloatType();
1309 case JDWP.Tag.DOUBLE:
1310 return theDoubleType();
1311 default:
1312 throw new IllegalArgumentException("Unrecognized primitive tag " + tag);
1313 }
1314 }
1315
1316 private void processBatchedDisposes() {
1317 if (shutdown) {
1318 return;
1319 }
1320
1321 JDWP.VirtualMachine.DisposeObjects.Request[] requests = null;
1322 synchronized(batchedDisposeRequests) {
1323 int size = batchedDisposeRequests.size();
1324 if (size >= DISPOSE_THRESHOLD) {
1325 if ((traceFlags & TRACE_OBJREFS) != 0) {
1326 printTrace("Dispose threshold reached. Will dispose "
1327 + size + " object references...");
1328 }
1329 requests = new JDWP.VirtualMachine.DisposeObjects.Request[size];
1330 for (int i = 0; i < requests.length; i++) {
1331 SoftObjectReference ref = batchedDisposeRequests.get(i);
1332 if ((traceFlags & TRACE_OBJREFS) != 0) {
1333 printTrace("Disposing object " + ref.key().longValue() +
1334 " (ref count = " + ref.count() + ")");
1335 }
1336
1337 // This is kludgy. We temporarily re-create an object
1338 // reference so that we can correctly pass its id to the
1339 // JDWP command.
1340 requests[i] =
1341 new JDWP.VirtualMachine.DisposeObjects.Request(
1342 new ObjectReferenceImpl(this, ref.key().longValue()),
1343 ref.count());
1344 }
1345 batchedDisposeRequests.clear();
1346 }
1347 }
1348 if (requests != null) {
1349 try {
1350 JDWP.VirtualMachine.DisposeObjects.process(vm, requests);
1351 } catch (JDWPException exc) {
1352 throw exc.toJDIException();
1353 }
1354 }
1355 }
1356
1357 private void batchForDispose(SoftObjectReference ref) {
1358 if ((traceFlags & TRACE_OBJREFS) != 0) {
1359 printTrace("Batching object " + ref.key().longValue() +
1360 " for dispose (ref count = " + ref.count() + ")");
1361 }
1362 batchedDisposeRequests.add(ref);
1363 }
1364
1365 private void processQueue() {
1366 Reference<?> ref;
1367 //if ((traceFlags & TRACE_OBJREFS) != 0) {
1368 // printTrace("Checking for softly reachable objects");
1369 //}
1370 boolean found = false;
1371 while ((ref = referenceQueue.poll()) != null) {
1372 SoftObjectReference softRef = (SoftObjectReference)ref;
1373 removeObjectMirror(softRef);
1374 batchForDispose(softRef);
1375 found = true;
1376 }
1377
1378 if (found) {
1379 // If we batched any ObjectReferences for disposing, we can dispose them now.
1380 processBatchedDisposes();
1381 }
1382 }
1383
1384 synchronized ObjectReferenceImpl objectMirror(long id, int tag) {
1385
1386 // Handle any queue elements that are not strongly reachable
1387 processQueue();
1388
1389 if (id == 0) {
1390 return null;
1391 }
1392 ObjectReferenceImpl object = null;
1393 Long key = id;
1394
1395 /*
1396 * Attempt to retrieve an existing object reference
1397 */
1398 SoftObjectReference ref = objectsByID.get(key);
1399 if (ref != null) {
1400 object = ref.object();
1401 }
1402
1403 /*
1404 * If the object wasn't in the table, or it's soft reference was
1405 * cleared, create a new instance.
1406 */
1407 if (object == null) {
1408 switch (tag) {
1409 case JDWP.Tag.OBJECT:
1410 object = new ObjectReferenceImpl(vm, id);
1411 break;
1412 case JDWP.Tag.STRING:
1413 object = new StringReferenceImpl(vm, id);
1414 break;
1415 case JDWP.Tag.ARRAY:
1416 object = new ArrayReferenceImpl(vm, id);
1417 break;
1418 case JDWP.Tag.THREAD:
1419 ThreadReferenceImpl thread =
1420 new ThreadReferenceImpl(vm, id);
1421 thread.addListener(this);
1422 object = thread;
1423 break;
1424 case JDWP.Tag.THREAD_GROUP:
1425 object = new ThreadGroupReferenceImpl(vm, id);
1426 break;
1427 case JDWP.Tag.CLASS_LOADER:
1428 object = new ClassLoaderReferenceImpl(vm, id);
1429 break;
1430 case JDWP.Tag.CLASS_OBJECT:
1431 object = new ClassObjectReferenceImpl(vm, id);
1432 break;
1433 default:
1434 throw new IllegalArgumentException("Invalid object tag: " + tag);
1435 }
1436 ref = new SoftObjectReference(key, object, referenceQueue);
1437
1438 /*
1439 * If there was no previous entry in the table, we add one here
1440 * If the previous entry was cleared, we replace it here.
1441 */
1442 objectsByID.put(key, ref);
1443 if ((traceFlags & TRACE_OBJREFS) != 0) {
1444 printTrace("Creating new " +
1445 object.getClass().getName() + " (id = " + id + ")");
1446 }
1447 } else {
1448 ref.incrementCount();
1449 }
1450
1451 return object;
1452 }
1453
1454 private synchronized void removeObjectMirror(SoftObjectReference ref) {
1455 /*
1456 * This will remove the soft reference if it has not been
1457 * replaced in the cache.
1458 */
1459 objectsByID.remove(ref.key());
1460 }
1461
1462 ObjectReferenceImpl objectMirror(long id) {
1463 return objectMirror(id, JDWP.Tag.OBJECT);
1464 }
1465
1466 StringReferenceImpl stringMirror(long id) {
1467 return (StringReferenceImpl)objectMirror(id, JDWP.Tag.STRING);
1468 }
1469
1470 ArrayReferenceImpl arrayMirror(long id) {
1471 return (ArrayReferenceImpl)objectMirror(id, JDWP.Tag.ARRAY);
1472 }
1473
1474 ThreadReferenceImpl threadMirror(long id) {
1475 return (ThreadReferenceImpl)objectMirror(id, JDWP.Tag.THREAD);
1476 }
1477
1478 ThreadGroupReferenceImpl threadGroupMirror(long id) {
1479 return (ThreadGroupReferenceImpl)objectMirror(id,
1480 JDWP.Tag.THREAD_GROUP);
1481 }
1482
1483 ClassLoaderReferenceImpl classLoaderMirror(long id) {
1484 return (ClassLoaderReferenceImpl)objectMirror(id,
1485 JDWP.Tag.CLASS_LOADER);
1486 }
1487
1488 ClassObjectReferenceImpl classObjectMirror(long id) {
1489 return (ClassObjectReferenceImpl)objectMirror(id,
1490 JDWP.Tag.CLASS_OBJECT);
1491 }
1492
1493 ModuleReferenceImpl moduleMirror(long id) {
1494 return (ModuleReferenceImpl)getModule(id);
1495 }
1496
1497 /*
1498 * Implementation of PathSearchingVirtualMachine
1499 */
1500 private JDWP.VirtualMachine.ClassPaths getClasspath() {
1501 if (pathInfo == null) {
1502 try {
1503 pathInfo = JDWP.VirtualMachine.ClassPaths.process(vm);
1504 } catch (JDWPException exc) {
1505 throw exc.toJDIException();
1506 }
1507 }
1508 return pathInfo;
1509 }
1510
1511 public List<String> classPath() {
1512 return Arrays.asList(getClasspath().classpaths);
1513 }
1514
1515 public List<String> bootClassPath() {
1516 return Collections.emptyList();
1517 }
1518
1519 public String baseDirectory() {
1520 return getClasspath().baseDir;
1521 }
1522
1523 public void setDefaultStratum(String stratum) {
1524 defaultStratum = stratum;
1525 if (stratum == null) {
1526 stratum = "";
1527 }
1528 try {
1529 JDWP.VirtualMachine.SetDefaultStratum.process(vm,
1530 stratum);
1531 } catch (JDWPException exc) {
1532 throw exc.toJDIException();
1533 }
1534 }
1535
1536 public String getDefaultStratum() {
1537 return defaultStratum;
1538 }
1539
1540 ThreadGroup threadGroupForJDI() {
1541 return threadGroupForJDI;
1542 }
1543
1544 private static class SoftObjectReference extends SoftReference<ObjectReferenceImpl> {
1545 int count;
1546 Long key;
1547
1548 SoftObjectReference(Long key, ObjectReferenceImpl mirror,
1549 ReferenceQueue<ObjectReferenceImpl> queue) {
1550 super(mirror, queue);
1551 this.count = 1;
1552 this.key = key;
1553 }
1554
1555 int count() {
1556 return count;
1557 }
1558
1559 void incrementCount() {
1560 count++;
1561 }
1562
1563 Long key() {
1564 return key;
1565 }
1566
1567 ObjectReferenceImpl object() {
1568 return get();
1569 }
1570 }
1571 }