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 #include <ctype.h>
27
28 #include "util.h"
29 #include "utf_util.h"
30 #include "transport.h"
31 #include "eventHandler.h"
32 #include "threadControl.h"
33 #include "outStream.h"
34 #include "inStream.h"
35 #include "invoker.h"
36 #include "signature.h"
37
38
39 /* Global data area */
40 BackendGlobalData *gdata = NULL;
41
42 /* Forward declarations */
43 static jboolean isInterface(jclass clazz);
44 static jboolean isArrayClass(jclass clazz);
45 static char * getPropertyUTF8(JNIEnv *env, char *propertyName);
46
47 /* Save an object reference for use later (create a NewGlobalRef) */
48 void
49 saveGlobalRef(JNIEnv *env, jobject obj, jobject *pobj)
50 {
51 jobject newobj;
52
53 if ( pobj == NULL ) {
54 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"saveGlobalRef pobj");
55 }
56 if ( *pobj != NULL ) {
57 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"saveGlobalRef *pobj");
58 }
59 if ( env == NULL ) {
60 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"saveGlobalRef env");
61 }
62 if ( obj == NULL ) {
63 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"saveGlobalRef obj");
64 }
65 newobj = JNI_FUNC_PTR(env,NewGlobalRef)(env, obj);
66 if ( newobj == NULL ) {
67 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,"NewGlobalRef");
68 }
69 *pobj = newobj;
70 }
71
72 /* Toss a previously saved object reference */
73 void
74 tossGlobalRef(JNIEnv *env, jobject *pobj)
75 {
76 jobject obj;
77
78 if ( pobj == NULL ) {
79 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"tossGlobalRef pobj");
80 }
81 obj = *pobj;
82 if ( env == NULL ) {
83 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"tossGlobalRef env");
84 }
85 if ( obj == NULL ) {
86 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,"tossGlobalRef obj");
87 }
88 JNI_FUNC_PTR(env,DeleteGlobalRef)(env, obj);
89 *pobj = NULL;
90 }
91
92 jclass
93 findClass(JNIEnv *env, const char * name)
94 {
95 jclass x;
96
97 if ( env == NULL ) {
98 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"findClass env");
99 }
100 if ( name == NULL || name[0] == 0 ) {
101 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"findClass name");
102 }
103 x = JNI_FUNC_PTR(env,FindClass)(env, name);
104 if (x == NULL) {
105 ERROR_MESSAGE(("JDWP Can't find class %s", name));
106 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,NULL);
107 }
108 if ( JNI_FUNC_PTR(env,ExceptionOccurred)(env) ) {
109 ERROR_MESSAGE(("JDWP Exception occurred finding class %s", name));
110 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,NULL);
111 }
112 return x;
113 }
114
115 jmethodID
116 getMethod(JNIEnv *env, jclass clazz, const char * name, const char *signature)
117 {
118 jmethodID method;
119
120 if ( env == NULL ) {
121 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getMethod env");
122 }
123 if ( clazz == NULL ) {
124 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getMethod clazz");
125 }
126 if ( name == NULL || name[0] == 0 ) {
127 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getMethod name");
128 }
129 if ( signature == NULL || signature[0] == 0 ) {
130 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getMethod signature");
131 }
132 method = JNI_FUNC_PTR(env,GetMethodID)(env, clazz, name, signature);
133 if (method == NULL) {
134 ERROR_MESSAGE(("JDWP Can't find method %s with signature %s",
135 name, signature));
136 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,NULL);
137 }
138 if ( JNI_FUNC_PTR(env,ExceptionOccurred)(env) ) {
139 ERROR_MESSAGE(("JDWP Exception occurred finding method %s with signature %s",
140 name, signature));
141 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,NULL);
142 }
143 return method;
144 }
145
146 static jmethodID
147 getStaticMethod(JNIEnv *env, jclass clazz, const char * name, const char *signature)
148 {
149 jmethodID method;
150
151 if ( env == NULL ) {
152 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getStaticMethod env");
153 }
154 if ( clazz == NULL ) {
155 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getStaticMethod clazz");
156 }
157 if ( name == NULL || name[0] == 0 ) {
158 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getStaticMethod name");
159 }
160 if ( signature == NULL || signature[0] == 0 ) {
161 EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"getStaticMethod signature");
162 }
163 method = JNI_FUNC_PTR(env,GetStaticMethodID)(env, clazz, name, signature);
164 if (method == NULL) {
165 ERROR_MESSAGE(("JDWP Can't find method %s with signature %s",
166 name, signature));
167 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,NULL);
168 }
169 if ( JNI_FUNC_PTR(env,ExceptionOccurred)(env) ) {
170 ERROR_MESSAGE(("JDWP Exception occurred finding method %s with signature %s",
171 name, signature));
172 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,NULL);
173 }
174 return method;
175 }
176
177
178
179 void
180 util_initialize(JNIEnv *env)
181 {
182 WITH_LOCAL_REFS(env, 6) {
183
184 jvmtiError error;
185 jclass localClassClass;
186 jclass localThreadClass;
187 jclass localThreadGroupClass;
188 jclass localClassLoaderClass;
189 jclass localStringClass;
190 jclass localSystemClass;
191 jclass localPropertiesClass;
192 jclass localVMSupportClass;
193 jobject localAgentProperties;
194 jmethodID getAgentProperties;
195 jint groupCount;
196 jthreadGroup *groups;
197 jthreadGroup localSystemThreadGroup;
198
199 /* Find some standard classes */
200
201 localClassClass = findClass(env,"java/lang/Class");
202 localThreadClass = findClass(env,"java/lang/Thread");
203 localThreadGroupClass = findClass(env,"java/lang/ThreadGroup");
204 localClassLoaderClass = findClass(env,"java/lang/ClassLoader");
205 localStringClass = findClass(env,"java/lang/String");
206 localSystemClass = findClass(env,"java/lang/System");
207 localPropertiesClass = findClass(env,"java/util/Properties");
208
209 /* Save references */
210
211 saveGlobalRef(env, localClassClass, &(gdata->classClass));
212 saveGlobalRef(env, localThreadClass, &(gdata->threadClass));
213 saveGlobalRef(env, localThreadGroupClass, &(gdata->threadGroupClass));
214 saveGlobalRef(env, localClassLoaderClass, &(gdata->classLoaderClass));
215 saveGlobalRef(env, localStringClass, &(gdata->stringClass));
216 saveGlobalRef(env, localSystemClass, &(gdata->systemClass));
217
218 /* Find some standard methods */
219
220 gdata->threadConstructor =
221 getMethod(env, gdata->threadClass,
222 "<init>", "(Ljava/lang/ThreadGroup;Ljava/lang/String;)V");
223 gdata->threadSetDaemon =
224 getMethod(env, gdata->threadClass, "setDaemon", "(Z)V");
225 gdata->systemGetProperty =
226 getStaticMethod(env, gdata->systemClass,
227 "getProperty", "(Ljava/lang/String;)Ljava/lang/String;");
228 gdata->setProperty =
229 getMethod(env, localPropertiesClass,
230 "setProperty", "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;");
231
232 /* Find the system thread group */
233
234 groups = NULL;
235 groupCount = 0;
236 error = JVMTI_FUNC_PTR(gdata->jvmti,GetTopThreadGroups)
237 (gdata->jvmti, &groupCount, &groups);
238 if (error != JVMTI_ERROR_NONE ) {
239 EXIT_ERROR(error, "Can't get system thread group");
240 }
241 if ( groupCount == 0 ) {
242 EXIT_ERROR(AGENT_ERROR_NULL_POINTER, "Can't get system thread group");
243 }
244 localSystemThreadGroup = groups[0];
245 saveGlobalRef(env, localSystemThreadGroup, &(gdata->systemThreadGroup));
246 jvmtiDeallocate(groups);
247
248 /* Get some basic Java property values we will need at some point */
249 gdata->property_java_version
250 = getPropertyUTF8(env, "java.version");
251 gdata->property_java_vm_name
252 = getPropertyUTF8(env, "java.vm.name");
253 gdata->property_java_vm_info
254 = getPropertyUTF8(env, "java.vm.info");
255 gdata->property_java_class_path
256 = getPropertyUTF8(env, "java.class.path");
257 gdata->property_sun_boot_library_path
258 = getPropertyUTF8(env, "sun.boot.library.path");
259 gdata->property_path_separator
260 = getPropertyUTF8(env, "path.separator");
261 gdata->property_user_dir
262 = getPropertyUTF8(env, "user.dir");
263
264 /* Get agent properties: invoke VMSupport.getAgentProperties */
265 localVMSupportClass = JNI_FUNC_PTR(env,FindClass)
266 (env, "jdk/internal/vm/VMSupport");
267 if (localVMSupportClass == NULL) {
268 gdata->agent_properties = NULL;
269 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
270 JNI_FUNC_PTR(env,ExceptionClear)(env);
271 }
272 } else {
273 getAgentProperties =
274 getStaticMethod(env, localVMSupportClass,
275 "getAgentProperties", "()Ljava/util/Properties;");
276 localAgentProperties =
277 JNI_FUNC_PTR(env,CallStaticObjectMethod)
278 (env, localVMSupportClass, getAgentProperties);
279 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
280 JNI_FUNC_PTR(env,ExceptionClear)(env);
281 EXIT_ERROR(AGENT_ERROR_INTERNAL,
282 "Exception occurred calling VMSupport.getAgentProperties");
283 }
284 saveGlobalRef(env, localAgentProperties, &(gdata->agent_properties));
285 }
286
287 } END_WITH_LOCAL_REFS(env);
288
289 }
290
291 void
292 util_reset(void)
293 {
294 }
295
296 jboolean
297 isObjectTag(jbyte tag) {
298 return (tag == JDWP_TAG(OBJECT)) ||
299 (tag == JDWP_TAG(STRING)) ||
300 (tag == JDWP_TAG(THREAD)) ||
301 (tag == JDWP_TAG(THREAD_GROUP)) ||
302 (tag == JDWP_TAG(CLASS_LOADER)) ||
303 (tag == JDWP_TAG(CLASS_OBJECT)) ||
304 (tag == JDWP_TAG(ARRAY));
305 }
306
307 jbyte
308 specificTypeKey(JNIEnv *env, jobject object)
309 {
310 if (object == NULL) {
311 return JDWP_TAG(OBJECT);
312 } else if (JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->stringClass)) {
313 return JDWP_TAG(STRING);
314 } else if (JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->threadClass)) {
315 return JDWP_TAG(THREAD);
316 } else if (JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->threadGroupClass)) {
317 return JDWP_TAG(THREAD_GROUP);
318 } else if (JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->classLoaderClass)) {
319 return JDWP_TAG(CLASS_LOADER);
320 } else if (JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->classClass)) {
321 return JDWP_TAG(CLASS_OBJECT);
322 } else {
323 jboolean classIsArray;
324
325 WITH_LOCAL_REFS(env, 1) {
326 jclass clazz;
327 clazz = JNI_FUNC_PTR(env,GetObjectClass)(env, object);
328 classIsArray = isArrayClass(clazz);
329 } END_WITH_LOCAL_REFS(env);
330
331 return (classIsArray ? JDWP_TAG(ARRAY) : JDWP_TAG(OBJECT));
332 }
333 }
334
335 static void
336 writeFieldValue(JNIEnv *env, PacketOutputStream *out, jobject object,
337 jfieldID field)
338 {
339 jclass clazz;
340 char *signature = NULL;
341 jvmtiError error;
342 jbyte typeKey;
343
344 clazz = JNI_FUNC_PTR(env,GetObjectClass)(env, object);
345 error = fieldSignature(clazz, field, NULL, &signature, NULL);
346 if (error != JVMTI_ERROR_NONE) {
347 outStream_setError(out, map2jdwpError(error));
348 return;
349 }
350 typeKey = jdwpTag(signature);
351 jvmtiDeallocate(signature);
352
353 if (isReferenceTag(typeKey)) {
354
355 jobject value = JNI_FUNC_PTR(env,GetObjectField)(env, object, field);
356 (void)outStream_writeByte(out, specificTypeKey(env, value));
357 (void)outStream_writeObjectRef(env, out, value);
358 return;
359
360 }
361
362 /*
363 * For primitive types, the type key is bounced back as is.
364 */
365 (void)outStream_writeByte(out, typeKey);
366
367 switch (typeKey) {
368 case JDWP_TAG(BYTE):
369 (void)outStream_writeByte(out,
370 JNI_FUNC_PTR(env,GetByteField)(env, object, field));
371 break;
372
373 case JDWP_TAG(CHAR):
374 (void)outStream_writeChar(out,
375 JNI_FUNC_PTR(env,GetCharField)(env, object, field));
376 break;
377
378 case JDWP_TAG(FLOAT):
379 (void)outStream_writeFloat(out,
380 JNI_FUNC_PTR(env,GetFloatField)(env, object, field));
381 break;
382
383 case JDWP_TAG(DOUBLE):
384 (void)outStream_writeDouble(out,
385 JNI_FUNC_PTR(env,GetDoubleField)(env, object, field));
386 break;
387
388 case JDWP_TAG(INT):
389 (void)outStream_writeInt(out,
390 JNI_FUNC_PTR(env,GetIntField)(env, object, field));
391 break;
392
393 case JDWP_TAG(LONG):
394 (void)outStream_writeLong(out,
395 JNI_FUNC_PTR(env,GetLongField)(env, object, field));
396 break;
397
398 case JDWP_TAG(SHORT):
399 (void)outStream_writeShort(out,
400 JNI_FUNC_PTR(env,GetShortField)(env, object, field));
401 break;
402
403 case JDWP_TAG(BOOLEAN):
404 (void)outStream_writeBoolean(out,
405 JNI_FUNC_PTR(env,GetBooleanField)(env, object, field));
406 break;
407 }
408 }
409
410 static void
411 writeStaticFieldValue(JNIEnv *env, PacketOutputStream *out, jclass clazz,
412 jfieldID field)
413 {
414 jvmtiError error;
415 char *signature = NULL;
416 jbyte typeKey;
417
418 error = fieldSignature(clazz, field, NULL, &signature, NULL);
419 if (error != JVMTI_ERROR_NONE) {
420 outStream_setError(out, map2jdwpError(error));
421 return;
422 }
423 typeKey = jdwpTag(signature);
424 jvmtiDeallocate(signature);
425
426
427 if (isReferenceTag(typeKey)) {
428
429 jobject value = JNI_FUNC_PTR(env,GetStaticObjectField)(env, clazz, field);
430 (void)outStream_writeByte(out, specificTypeKey(env, value));
431 (void)outStream_writeObjectRef(env, out, value);
432
433 return;
434 }
435
436 /*
437 * For primitive types, the type key is bounced back as is.
438 */
439 (void)outStream_writeByte(out, typeKey);
440 switch (typeKey) {
441 case JDWP_TAG(BYTE):
442 (void)outStream_writeByte(out,
443 JNI_FUNC_PTR(env,GetStaticByteField)(env, clazz, field));
444 break;
445
446 case JDWP_TAG(CHAR):
447 (void)outStream_writeChar(out,
448 JNI_FUNC_PTR(env,GetStaticCharField)(env, clazz, field));
449 break;
450
451 case JDWP_TAG(FLOAT):
452 (void)outStream_writeFloat(out,
453 JNI_FUNC_PTR(env,GetStaticFloatField)(env, clazz, field));
454 break;
455
456 case JDWP_TAG(DOUBLE):
457 (void)outStream_writeDouble(out,
458 JNI_FUNC_PTR(env,GetStaticDoubleField)(env, clazz, field));
459 break;
460
461 case JDWP_TAG(INT):
462 (void)outStream_writeInt(out,
463 JNI_FUNC_PTR(env,GetStaticIntField)(env, clazz, field));
464 break;
465
466 case JDWP_TAG(LONG):
467 (void)outStream_writeLong(out,
468 JNI_FUNC_PTR(env,GetStaticLongField)(env, clazz, field));
469 break;
470
471 case JDWP_TAG(SHORT):
472 (void)outStream_writeShort(out,
473 JNI_FUNC_PTR(env,GetStaticShortField)(env, clazz, field));
474 break;
475
476 case JDWP_TAG(BOOLEAN):
477 (void)outStream_writeBoolean(out,
478 JNI_FUNC_PTR(env,GetStaticBooleanField)(env, clazz, field));
479 break;
480 }
481 }
482
483 void
484 sharedGetFieldValues(PacketInputStream *in, PacketOutputStream *out,
485 jboolean isStatic)
486 {
487 JNIEnv *env = getEnv();
488 jint length;
489 jobject object;
490 jclass clazz;
491
492 object = NULL;
493 clazz = NULL;
494
495 if (isStatic) {
496 clazz = inStream_readClassRef(env, in);
497 } else {
498 object = inStream_readObjectRef(env, in);
499 }
500
501 length = inStream_readInt(in);
502 if (inStream_error(in)) {
503 return;
504 }
505
506 WITH_LOCAL_REFS(env, length + 1) { /* +1 for class with instance fields */
507
508 int i;
509
510 (void)outStream_writeInt(out, length);
511 for (i = 0; (i < length) && !outStream_error(out); i++) {
512 jfieldID field = inStream_readFieldID(in);
513
514 if (isStatic) {
515 writeStaticFieldValue(env, out, clazz, field);
516 } else {
517 writeFieldValue(env, out, object, field);
518 }
519 }
520
521 } END_WITH_LOCAL_REFS(env);
522 }
523
524 jboolean
525 sharedInvoke(PacketInputStream *in, PacketOutputStream *out)
526 {
527 jvalue *arguments = NULL;
528 jint options;
529 jvmtiError error;
530 jbyte invokeType;
531 jclass clazz;
532 jmethodID method;
533 jint argumentCount;
534 jobject instance;
535 jthread thread;
536 JNIEnv *env;
537
538 /*
539 * Instance methods start with the instance, thread and class,
540 * and statics and constructors start with the class and then the
541 * thread.
542 */
543 env = getEnv();
544 if (inStream_command(in) == JDWP_COMMAND(ObjectReference, InvokeMethod)) {
545 instance = inStream_readObjectRef(env, in);
546 thread = inStream_readThreadRef(env, in);
547 clazz = inStream_readClassRef(env, in);
548 } else { /* static method or constructor */
549 instance = NULL;
550 clazz = inStream_readClassRef(env, in);
551 thread = inStream_readThreadRef(env, in);
552 }
553
554 /*
555 * ... and the rest of the packet is identical for all commands
556 */
557 method = inStream_readMethodID(in);
558 argumentCount = inStream_readInt(in);
559 if (inStream_error(in)) {
560 return JNI_TRUE;
561 }
562
563 /* If count == 0, don't try and allocate 0 bytes, you'll get NULL */
564 if ( argumentCount > 0 ) {
565 int i;
566 /*LINTED*/
567 arguments = jvmtiAllocate(argumentCount * (jint)sizeof(*arguments));
568 if (arguments == NULL) {
569 outStream_setError(out, JDWP_ERROR(OUT_OF_MEMORY));
570 return JNI_TRUE;
571 }
572 for (i = 0; (i < argumentCount) && !inStream_error(in); i++) {
573 arguments[i] = inStream_readValue(in);
574 }
575 if (inStream_error(in)) {
576 return JNI_TRUE;
577 }
578 }
579
580 options = inStream_readInt(in);
581 if (inStream_error(in)) {
582 if ( arguments != NULL ) {
583 jvmtiDeallocate(arguments);
584 }
585 return JNI_TRUE;
586 }
587
588 if (inStream_command(in) == JDWP_COMMAND(ClassType, NewInstance)) {
589 invokeType = INVOKE_CONSTRUCTOR;
590 } else if (inStream_command(in) == JDWP_COMMAND(ClassType, InvokeMethod)) {
591 invokeType = INVOKE_STATIC;
592 } else if (inStream_command(in) == JDWP_COMMAND(InterfaceType, InvokeMethod)) {
593 invokeType = INVOKE_STATIC;
594 } else if (inStream_command(in) == JDWP_COMMAND(ObjectReference, InvokeMethod)) {
595 invokeType = INVOKE_INSTANCE;
596 } else {
597 outStream_setError(out, JDWP_ERROR(INTERNAL));
598 if ( arguments != NULL ) {
599 jvmtiDeallocate(arguments);
600 }
601 return JNI_TRUE;
602 }
603
604 /*
605 * Request the invoke. If there are no errors in the request,
606 * the interrupting thread will actually do the invoke and a
607 * reply will be generated subsequently, so we don't reply here.
608 */
609 error = invoker_requestInvoke(invokeType, (jbyte)options, inStream_id(in),
610 thread, clazz, method,
611 instance, arguments, argumentCount);
612 if (error != JVMTI_ERROR_NONE) {
613 outStream_setError(out, map2jdwpError(error));
614 if ( arguments != NULL ) {
615 jvmtiDeallocate(arguments);
616 }
617 return JNI_TRUE;
618 }
619
620 return JNI_FALSE; /* Don't reply */
621 }
622
623 jint
624 uniqueID(void)
625 {
626 static jint currentID = 0;
627 return currentID++;
628 }
629
630 int
631 filterDebugThreads(jthread *threads, int count)
632 {
633 int i;
634 int current;
635
636 /* Squish out all of the debugger-spawned threads */
637 for (i = 0, current = 0; i < count; i++) {
638 jthread thread = threads[i];
639 if (!threadControl_isDebugThread(thread)) {
640 if (i > current) {
641 threads[current] = thread;
642 }
643 current++;
644 }
645 }
646 return current;
647 }
648
649 jbyte
650 referenceTypeTag(jclass clazz)
651 {
652 jbyte tag;
653
654 if (isInterface(clazz)) {
655 tag = JDWP_TYPE_TAG(INTERFACE);
656 } else if (isArrayClass(clazz)) {
657 tag = JDWP_TYPE_TAG(ARRAY);
658 } else {
659 tag = JDWP_TYPE_TAG(CLASS);
660 }
661
662 return tag;
663 }
664
665 /**
666 * Get field modifiers
667 */
668 jvmtiError
669 fieldModifiers(jclass clazz, jfieldID field, jint *pmodifiers)
670 {
671 jvmtiError error;
672
673 *pmodifiers = 0;
674 error = JVMTI_FUNC_PTR(gdata->jvmti,GetFieldModifiers)
675 (gdata->jvmti, clazz, field, pmodifiers);
676 return error;
677 }
678
679 /**
680 * Get method modifiers
681 */
682 jvmtiError
683 methodModifiers(jmethodID method, jint *pmodifiers)
684 {
685 jvmtiError error;
686
687 *pmodifiers = 0;
688 error = JVMTI_FUNC_PTR(gdata->jvmti,GetMethodModifiers)
689 (gdata->jvmti, method, pmodifiers);
690 return error;
691 }
692
693 /* Returns a local ref to the declaring class for a method, or NULL. */
694 jvmtiError
695 methodClass(jmethodID method, jclass *pclazz)
696 {
697 jvmtiError error;
698
699 *pclazz = NULL;
700 error = JVMTI_FUNC_PTR(gdata->jvmti,GetMethodDeclaringClass)
701 (gdata->jvmti, method, pclazz);
702 return error;
703 }
704
705 /* Returns the start and end locations of the specified method. */
706 jvmtiError
707 methodLocation(jmethodID method, jlocation *ploc1, jlocation *ploc2)
708 {
709 jvmtiError error;
710
711 error = JVMTI_FUNC_PTR(gdata->jvmti,GetMethodLocation)
712 (gdata->jvmti, method, ploc1, ploc2);
713 return error;
714 }
715
716 /**
717 * Get method signature
718 */
719 jvmtiError
720 methodSignature(jmethodID method,
721 char **pname, char **psignature, char **pgeneric_signature)
722 {
723 jvmtiError error;
724 char *name = NULL;
725 char *signature = NULL;
726 char *generic_signature = NULL;
727
728 error = JVMTI_FUNC_PTR(gdata->jvmti,GetMethodName)
729 (gdata->jvmti, method, &name, &signature, &generic_signature);
730
731 if ( pname != NULL ) {
732 *pname = name;
733 } else if ( name != NULL ) {
734 jvmtiDeallocate(name);
735 }
736 if ( psignature != NULL ) {
737 *psignature = signature;
738 } else if ( signature != NULL ) {
739 jvmtiDeallocate(signature);
740 }
741 if ( pgeneric_signature != NULL ) {
742 *pgeneric_signature = generic_signature;
743 } else if ( generic_signature != NULL ) {
744 jvmtiDeallocate(generic_signature);
745 }
746 return error;
747 }
748
749 /*
750 * Get the return type key of the method
751 * V or B C D F I J S Z L [
752 */
753 jvmtiError
754 methodReturnType(jmethodID method, char *typeKey)
755 {
756 char *signature;
757 jvmtiError error;
758
759 signature = NULL;
760 error = methodSignature(method, NULL, &signature, NULL);
761 if (error == JVMTI_ERROR_NONE) {
762 if (signature == NULL ) {
763 error = AGENT_ERROR_INVALID_TAG;
764 } else {
765 char * xx;
766
767 xx = strchr(signature, ')');
768 if (xx == NULL || *(xx + 1) == 0) {
769 error = AGENT_ERROR_INVALID_TAG;
770 } else {
771 *typeKey = *(xx + 1);
772 }
773 jvmtiDeallocate(signature);
774 }
775 }
776 return error;
777 }
778
779
780 /**
781 * Return class loader for a class (must be inside a WITH_LOCAL_REFS)
782 */
783 jvmtiError
784 classLoader(jclass clazz, jobject *pclazz)
785 {
786 jvmtiError error;
787
788 *pclazz = NULL;
789 error = JVMTI_FUNC_PTR(gdata->jvmti,GetClassLoader)
790 (gdata->jvmti, clazz, pclazz);
791 return error;
792 }
793
794 /**
795 * Get field signature
796 */
797 jvmtiError
798 fieldSignature(jclass clazz, jfieldID field,
799 char **pname, char **psignature, char **pgeneric_signature)
800 {
801 jvmtiError error;
802 char *name = NULL;
803 char *signature = NULL;
804 char *generic_signature = NULL;
805
806 error = JVMTI_FUNC_PTR(gdata->jvmti,GetFieldName)
807 (gdata->jvmti, clazz, field, &name, &signature, &generic_signature);
808
809 if ( pname != NULL ) {
810 *pname = name;
811 } else if ( name != NULL ) {
812 jvmtiDeallocate(name);
813 }
814 if ( psignature != NULL ) {
815 *psignature = signature;
816 } else if ( signature != NULL ) {
817 jvmtiDeallocate(signature);
818 }
819 if ( pgeneric_signature != NULL ) {
820 *pgeneric_signature = generic_signature;
821 } else if ( generic_signature != NULL ) {
822 jvmtiDeallocate(generic_signature);
823 }
824 return error;
825 }
826
827 JNIEnv *
828 getEnv(void)
829 {
830 JNIEnv *env = NULL;
831 jint rc;
832
833 rc = FUNC_PTR(gdata->jvm,GetEnv)
834 (gdata->jvm, (void **)&env, JNI_VERSION_1_2);
835 if (rc != JNI_OK) {
836 ERROR_MESSAGE(("JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = %d",
837 rc));
838 EXIT_ERROR(AGENT_ERROR_NO_JNI_ENV,NULL);
839 }
840 return env;
841 }
842
843 jvmtiError
844 spawnNewThread(jvmtiStartFunction func, void *arg, char *name)
845 {
846 JNIEnv *env = getEnv();
847 jvmtiError error;
848
849 LOG_MISC(("Spawning new thread: %s", name));
850
851 WITH_LOCAL_REFS(env, 3) {
852
853 jthread thread;
854 jstring nameString;
855
856 nameString = JNI_FUNC_PTR(env,NewStringUTF)(env, name);
857 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
858 JNI_FUNC_PTR(env,ExceptionClear)(env);
859 error = AGENT_ERROR_OUT_OF_MEMORY;
860 goto err;
861 }
862
863 thread = JNI_FUNC_PTR(env,NewObject)
864 (env, gdata->threadClass, gdata->threadConstructor,
865 gdata->systemThreadGroup, nameString);
866 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
867 JNI_FUNC_PTR(env,ExceptionClear)(env);
868 error = AGENT_ERROR_OUT_OF_MEMORY;
869 goto err;
870 }
871
872 /*
873 * Make the debugger thread a daemon
874 */
875 JNI_FUNC_PTR(env,CallVoidMethod)
876 (env, thread, gdata->threadSetDaemon, JNI_TRUE);
877 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
878 JNI_FUNC_PTR(env,ExceptionClear)(env);
879 error = AGENT_ERROR_JNI_EXCEPTION;
880 goto err;
881 }
882
883 error = threadControl_addDebugThread(thread);
884 if (error == JVMTI_ERROR_NONE) {
885 /*
886 * Debugger threads need cycles in all sorts of strange
887 * situations (e.g. infinite cpu-bound loops), so give the
888 * thread a high priority. Note that if the VM has an application
889 * thread running at the max priority, there is still a chance
890 * that debugger threads will be starved. (There needs to be
891 * a way to give debugger threads a priority higher than any
892 * application thread).
893 */
894 error = JVMTI_FUNC_PTR(gdata->jvmti,RunAgentThread)
895 (gdata->jvmti, thread, func, arg,
896 JVMTI_THREAD_MAX_PRIORITY);
897 }
898
899 err: ;
900
901 } END_WITH_LOCAL_REFS(env);
902
903 return error;
904 }
905
906 jvmtiError
907 jvmtiGetCapabilities(jvmtiCapabilities *caps)
908 {
909 if ( gdata->vmDead ) {
910 return AGENT_ERROR_VM_DEAD;
911 }
912 if (!gdata->haveCachedJvmtiCapabilities) {
913 jvmtiError error;
914
915 error = JVMTI_FUNC_PTR(gdata->jvmti,GetCapabilities)
916 (gdata->jvmti, &(gdata->cachedJvmtiCapabilities));
917 if (error != JVMTI_ERROR_NONE) {
918 return error;
919 }
920 gdata->haveCachedJvmtiCapabilities = JNI_TRUE;
921 }
922
923 *caps = gdata->cachedJvmtiCapabilities;
924
925 return JVMTI_ERROR_NONE;
926 }
927
928 static jint
929 jvmtiVersion(void)
930 {
931 if (gdata->cachedJvmtiVersion == 0) {
932 jvmtiError error;
933 error = JVMTI_FUNC_PTR(gdata->jvmti,GetVersionNumber)
934 (gdata->jvmti, &(gdata->cachedJvmtiVersion));
935 if (error != JVMTI_ERROR_NONE) {
936 EXIT_ERROR(error, "on getting the JVMTI version number");
937 }
938 }
939 return gdata->cachedJvmtiVersion;
940 }
941
942 jint
943 jvmtiMajorVersion(void)
944 {
945 return (jvmtiVersion() & JVMTI_VERSION_MASK_MAJOR)
946 >> JVMTI_VERSION_SHIFT_MAJOR;
947 }
948
949 jint
950 jvmtiMinorVersion(void)
951 {
952 return (jvmtiVersion() & JVMTI_VERSION_MASK_MINOR)
953 >> JVMTI_VERSION_SHIFT_MINOR;
954 }
955
956 jint
957 jvmtiMicroVersion(void)
958 {
959 return (jvmtiVersion() & JVMTI_VERSION_MASK_MICRO)
960 >> JVMTI_VERSION_SHIFT_MICRO;
961 }
962
963 jvmtiError
964 getSourceDebugExtension(jclass clazz, char **extensionPtr)
965 {
966 return JVMTI_FUNC_PTR(gdata->jvmti,GetSourceDebugExtension)
967 (gdata->jvmti, clazz, extensionPtr);
968 }
969
970
971 static void
972 handleInterrupt(void)
973 {
974 /*
975 * An interrupt is handled:
976 *
977 * 1) for running application threads by deferring the interrupt
978 * until the current event handler has concluded.
979 *
980 * 2) for debugger threads by ignoring the interrupt; this is the
981 * most robust solution since debugger threads don't use interrupts
982 * to signal any condition.
983 *
984 * 3) for application threads that have not started or already
985 * ended by ignoring the interrupt. In the former case, the application
986 * is relying on timing to determine whether or not the thread sees
987 * the interrupt; in the latter case, the interrupt is meaningless.
988 */
989 jthread thread = threadControl_currentThread();
990 if ((thread != NULL) && (!threadControl_isDebugThread(thread))) {
991 threadControl_setPendingInterrupt(thread);
992 }
993 }
994
995 static jvmtiError
996 ignore_vm_death(jvmtiError error)
997 {
998 if (error == JVMTI_ERROR_WRONG_PHASE) {
999 LOG_MISC(("VM_DEAD, in debugMonitor*()?"));
1000 return JVMTI_ERROR_NONE; /* JVMTI does this, not JVMDI? */
1001 }
1002 return error;
1003 }
1004
1005 void
1006 debugMonitorEnter(jrawMonitorID monitor)
1007 {
1008 jvmtiError error;
1009 error = JVMTI_FUNC_PTR(gdata->jvmti,RawMonitorEnter)
1010 (gdata->jvmti, monitor);
1011 error = ignore_vm_death(error);
1012 if (error != JVMTI_ERROR_NONE) {
1013 EXIT_ERROR(error, "on raw monitor enter");
1014 }
1015 }
1016
1017 void
1018 debugMonitorExit(jrawMonitorID monitor)
1019 {
1020 jvmtiError error;
1021
1022 error = JVMTI_FUNC_PTR(gdata->jvmti,RawMonitorExit)
1023 (gdata->jvmti, monitor);
1024 error = ignore_vm_death(error);
1025 if (error != JVMTI_ERROR_NONE) {
1026 EXIT_ERROR(error, "on raw monitor exit");
1027 }
1028 }
1029
1030 void
1031 debugMonitorWait(jrawMonitorID monitor)
1032 {
1033 jvmtiError error;
1034 error = JVMTI_FUNC_PTR(gdata->jvmti,RawMonitorWait)
1035 (gdata->jvmti, monitor, ((jlong)(-1)));
1036
1037 /*
1038 * According to the JLS (17.8), here we have
1039 * either :
1040 * a- been notified
1041 * b- gotten a spurious wakeup
1042 * c- been interrupted
1043 * If both a and c have happened, the VM must choose
1044 * which way to return - a or c. If it chooses c
1045 * then the notify is gone - either to some other
1046 * thread that is also waiting, or it is dropped
1047 * on the floor.
1048 *
1049 * a is what we expect. b won't hurt us any -
1050 * callers should be programmed to handle
1051 * spurious wakeups. In case of c,
1052 * then the interrupt has been cleared, but
1053 * we don't want to consume it. It came from
1054 * user code and is intended for user code, not us.
1055 * So, we will remember that the interrupt has
1056 * occurred and re-activate it when this thread
1057 * goes back into user code.
1058 * That being said, what do we do here? Since
1059 * we could have been notified too, here we will
1060 * just pretend that we have been. It won't hurt
1061 * anything to return in the same way as if
1062 * we were notified since callers have to be able to
1063 * handle spurious wakeups anyway.
1064 */
1065 if (error == JVMTI_ERROR_INTERRUPT) {
1066 handleInterrupt();
1067 error = JVMTI_ERROR_NONE;
1068 }
1069 error = ignore_vm_death(error);
1070 if (error != JVMTI_ERROR_NONE) {
1071 EXIT_ERROR(error, "on raw monitor wait");
1072 }
1073 }
1074
1075 void
1076 debugMonitorNotify(jrawMonitorID monitor)
1077 {
1078 jvmtiError error;
1079
1080 error = JVMTI_FUNC_PTR(gdata->jvmti,RawMonitorNotify)
1081 (gdata->jvmti, monitor);
1082 error = ignore_vm_death(error);
1083 if (error != JVMTI_ERROR_NONE) {
1084 EXIT_ERROR(error, "on raw monitor notify");
1085 }
1086 }
1087
1088 void
1089 debugMonitorNotifyAll(jrawMonitorID monitor)
1090 {
1091 jvmtiError error;
1092
1093 error = JVMTI_FUNC_PTR(gdata->jvmti,RawMonitorNotifyAll)
1094 (gdata->jvmti, monitor);
1095 error = ignore_vm_death(error);
1096 if (error != JVMTI_ERROR_NONE) {
1097 EXIT_ERROR(error, "on raw monitor notify all");
1098 }
1099 }
1100
1101 jrawMonitorID
1102 debugMonitorCreate(char *name)
1103 {
1104 jrawMonitorID monitor;
1105 jvmtiError error;
1106
1107 error = JVMTI_FUNC_PTR(gdata->jvmti,CreateRawMonitor)
1108 (gdata->jvmti, name, &monitor);
1109 if (error != JVMTI_ERROR_NONE) {
1110 EXIT_ERROR(error, "on creation of a raw monitor");
1111 }
1112 return monitor;
1113 }
1114
1115 void
1116 debugMonitorDestroy(jrawMonitorID monitor)
1117 {
1118 jvmtiError error;
1119
1120 error = JVMTI_FUNC_PTR(gdata->jvmti,DestroyRawMonitor)
1121 (gdata->jvmti, monitor);
1122 error = ignore_vm_death(error);
1123 if (error != JVMTI_ERROR_NONE) {
1124 EXIT_ERROR(error, "on destruction of raw monitor");
1125 }
1126 }
1127
1128 /**
1129 * Return array of all threads (must be inside a WITH_LOCAL_REFS)
1130 */
1131 jthread *
1132 allThreads(jint *count)
1133 {
1134 jthread *threads;
1135 jvmtiError error;
1136
1137 *count = 0;
1138 threads = NULL;
1139 error = JVMTI_FUNC_PTR(gdata->jvmti,GetAllThreads)
1140 (gdata->jvmti, count, &threads);
1141 if (error == AGENT_ERROR_OUT_OF_MEMORY) {
1142 return NULL; /* Let caller deal with no memory? */
1143 }
1144 if (error != JVMTI_ERROR_NONE) {
1145 EXIT_ERROR(error, "getting all threads");
1146 }
1147 return threads;
1148 }
1149
1150 /**
1151 * Fill the passed in structure with thread group info.
1152 * name field is JVMTI allocated. parent is global ref.
1153 */
1154 void
1155 threadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo *info)
1156 {
1157 jvmtiError error;
1158
1159 error = JVMTI_FUNC_PTR(gdata->jvmti,GetThreadGroupInfo)
1160 (gdata->jvmti, group, info);
1161 if (error != JVMTI_ERROR_NONE) {
1162 EXIT_ERROR(error, "on getting thread group info");
1163 }
1164 }
1165
1166 /**
1167 * Return class signature string
1168 */
1169 jvmtiError
1170 classSignature(jclass clazz, char **psignature, char **pgeneric_signature)
1171 {
1172 jvmtiError error;
1173 char *signature = NULL;
1174
1175 /*
1176 * pgeneric_signature can be NULL, and GetClassSignature
1177 * accepts NULL.
1178 */
1179 error = JVMTI_FUNC_PTR(gdata->jvmti,GetClassSignature)
1180 (gdata->jvmti, clazz, &signature, pgeneric_signature);
1181
1182 if ( psignature != NULL ) {
1183 *psignature = signature;
1184 } else if ( signature != NULL ) {
1185 jvmtiDeallocate(signature);
1186 }
1187 return error;
1188 }
1189
1190 /* Get class name (not signature) */
1191 char *
1192 getClassname(jclass clazz)
1193 {
1194 char *classname;
1195
1196 classname = NULL;
1197 if ( clazz != NULL ) {
1198 if (classSignature(clazz, &classname, NULL) != JVMTI_ERROR_NONE) {
1199 classname = NULL;
1200 } else {
1201 /* Convert in place */
1202 convertSignatureToClassname(classname);
1203 }
1204 }
1205 return classname; /* Caller must free this memory */
1206 }
1207
1208 void
1209 writeGenericSignature(PacketOutputStream *out, char *genericSignature)
1210 {
1211 if (genericSignature == NULL) {
1212 (void)outStream_writeString(out, "");
1213 } else {
1214 (void)outStream_writeString(out, genericSignature);
1215 }
1216 }
1217
1218 jint
1219 classStatus(jclass clazz)
1220 {
1221 jint status;
1222 jvmtiError error;
1223
1224 error = JVMTI_FUNC_PTR(gdata->jvmti,GetClassStatus)
1225 (gdata->jvmti, clazz, &status);
1226 if (error != JVMTI_ERROR_NONE) {
1227 EXIT_ERROR(error, "on getting class status");
1228 }
1229 return status;
1230 }
1231
1232 static jboolean
1233 isArrayClass(jclass clazz)
1234 {
1235 jboolean isArray = JNI_FALSE;
1236 jvmtiError error;
1237
1238 error = JVMTI_FUNC_PTR(gdata->jvmti,IsArrayClass)
1239 (gdata->jvmti, clazz, &isArray);
1240 if (error != JVMTI_ERROR_NONE) {
1241 EXIT_ERROR(error, "on checking for an array class");
1242 }
1243 return isArray;
1244 }
1245
1246 static jboolean
1247 isInterface(jclass clazz)
1248 {
1249 jboolean isInterface = JNI_FALSE;
1250 jvmtiError error;
1251
1252 error = JVMTI_FUNC_PTR(gdata->jvmti,IsInterface)
1253 (gdata->jvmti, clazz, &isInterface);
1254 if (error != JVMTI_ERROR_NONE) {
1255 EXIT_ERROR(error, "on checking for an interface");
1256 }
1257 return isInterface;
1258 }
1259
1260 jvmtiError
1261 isFieldSynthetic(jclass clazz, jfieldID field, jboolean *psynthetic)
1262 {
1263 jvmtiError error;
1264
1265 error = JVMTI_FUNC_PTR(gdata->jvmti,IsFieldSynthetic)
1266 (gdata->jvmti, clazz, field, psynthetic);
1267 if ( error == JVMTI_ERROR_MUST_POSSESS_CAPABILITY ) {
1268 /* If the query is not supported, we assume it is not synthetic. */
1269 *psynthetic = JNI_FALSE;
1270 return JVMTI_ERROR_NONE;
1271 }
1272 return error;
1273 }
1274
1275 jvmtiError
1276 isMethodSynthetic(jmethodID method, jboolean *psynthetic)
1277 {
1278 jvmtiError error;
1279
1280 error = JVMTI_FUNC_PTR(gdata->jvmti,IsMethodSynthetic)
1281 (gdata->jvmti, method, psynthetic);
1282 if ( error == JVMTI_ERROR_MUST_POSSESS_CAPABILITY ) {
1283 /* If the query is not supported, we assume it is not synthetic. */
1284 *psynthetic = JNI_FALSE;
1285 return JVMTI_ERROR_NONE;
1286 }
1287 return error;
1288 }
1289
1290 jboolean
1291 isMethodNative(jmethodID method)
1292 {
1293 jboolean isNative = JNI_FALSE;
1294 jvmtiError error;
1295
1296 error = JVMTI_FUNC_PTR(gdata->jvmti,IsMethodNative)
1297 (gdata->jvmti, method, &isNative);
1298 if (error != JVMTI_ERROR_NONE) {
1299 EXIT_ERROR(error, "on checking for a native interface");
1300 }
1301 return isNative;
1302 }
1303
1304 jboolean
1305 isSameObject(JNIEnv *env, jobject o1, jobject o2)
1306 {
1307 if ( o1==o2 ) {
1308 return JNI_TRUE;
1309 }
1310 return FUNC_PTR(env,IsSameObject)(env, o1, o2);
1311 }
1312
1313 jint
1314 objectHashCode(jobject object)
1315 {
1316 jint hashCode = 0;
1317 jvmtiError error;
1318
1319 if ( object!=NULL ) {
1320 error = JVMTI_FUNC_PTR(gdata->jvmti,GetObjectHashCode)
1321 (gdata->jvmti, object, &hashCode);
1322 if (error != JVMTI_ERROR_NONE) {
1323 EXIT_ERROR(error, "on getting an object hash code");
1324 }
1325 }
1326 return hashCode;
1327 }
1328
1329 /* Get all implemented interfaces (must be inside a WITH_LOCAL_REFS) */
1330 jvmtiError
1331 allInterfaces(jclass clazz, jclass **ppinterfaces, jint *pcount)
1332 {
1333 jvmtiError error;
1334
1335 *pcount = 0;
1336 *ppinterfaces = NULL;
1337 error = JVMTI_FUNC_PTR(gdata->jvmti,GetImplementedInterfaces)
1338 (gdata->jvmti, clazz, pcount, ppinterfaces);
1339 return error;
1340 }
1341
1342 /* Get all loaded classes (must be inside a WITH_LOCAL_REFS) */
1343 jvmtiError
1344 allLoadedClasses(jclass **ppclasses, jint *pcount)
1345 {
1346 jvmtiError error;
1347
1348 *pcount = 0;
1349 *ppclasses = NULL;
1350 error = JVMTI_FUNC_PTR(gdata->jvmti,GetLoadedClasses)
1351 (gdata->jvmti, pcount, ppclasses);
1352 return error;
1353 }
1354
1355 /* Get all loaded classes for a loader (must be inside a WITH_LOCAL_REFS) */
1356 jvmtiError
1357 allClassLoaderClasses(jobject loader, jclass **ppclasses, jint *pcount)
1358 {
1359 jvmtiError error;
1360
1361 *pcount = 0;
1362 *ppclasses = NULL;
1363 error = JVMTI_FUNC_PTR(gdata->jvmti,GetClassLoaderClasses)
1364 (gdata->jvmti, loader, pcount, ppclasses);
1365 return error;
1366 }
1367
1368 static jboolean
1369 is_a_nested_class(char *outer_sig, int outer_sig_len, char *sig, int sep)
1370 {
1371 char *inner;
1372
1373 /* Assumed outer class signature is "LOUTERCLASSNAME;"
1374 * inner class signature is "LOUTERCLASSNAME$INNERNAME;"
1375 *
1376 * INNERNAME can take the form:
1377 * [0-9][1-9]* anonymous class somewhere in the file
1378 * [0-9][1-9]*NAME local class somewhere in the OUTER class
1379 * NAME nested class in OUTER
1380 *
1381 * If NAME itself contains a $ (sep) then classname is further nested
1382 * inside another class.
1383 *
1384 */
1385
1386 /* Check prefix first */
1387 if ( strncmp(sig, outer_sig, outer_sig_len-1) != 0 ) {
1388 return JNI_FALSE;
1389 }
1390
1391 /* Prefix must be followed by a $ (sep) */
1392 if ( sig[outer_sig_len-1] != sep ) {
1393 return JNI_FALSE; /* No sep follows the match, must not be nested. */
1394 }
1395
1396 /* Walk past any digits, if we reach the end, must be pure anonymous */
1397 inner = sig + outer_sig_len;
1398 #if 1 /* We want to return local classes */
1399 while ( *inner && isdigit(*inner) ) {
1400 inner++;
1401 }
1402 /* But anonymous class names can't be trusted. */
1403 if ( *inner == ';' ) {
1404 return JNI_FALSE; /* A pure anonymous class */
1405 }
1406 #else
1407 if ( *inner && isdigit(*inner) ) {
1408 return JNI_FALSE; /* A pure anonymous or local class */
1409 }
1410 #endif
1411
1412 /* Nested deeper? */
1413 if ( strchr(inner, sep) != NULL ) {
1414 return JNI_FALSE; /* Nested deeper than we want? */
1415 }
1416 return JNI_TRUE;
1417 }
1418
1419 /* Get all nested classes for a class (must be inside a WITH_LOCAL_REFS) */
1420 jvmtiError
1421 allNestedClasses(jclass parent_clazz, jclass **ppnested, jint *pcount)
1422 {
1423 jvmtiError error;
1424 jobject parent_loader;
1425 jclass *classes;
1426 char *signature;
1427 size_t len;
1428 jint count;
1429 jint ncount;
1430 int i;
1431
1432 *ppnested = NULL;
1433 *pcount = 0;
1434
1435 parent_loader = NULL;
1436 classes = NULL;
1437 signature = NULL;
1438 count = 0;
1439 ncount = 0;
1440
1441 error = classLoader(parent_clazz, &parent_loader);
1442 if (error != JVMTI_ERROR_NONE) {
1443 return error;
1444 }
1445 error = classSignature(parent_clazz, &signature, NULL);
1446 if (error != JVMTI_ERROR_NONE) {
1447 return error;
1448 }
1449 len = strlen(signature);
1450
1451 error = allClassLoaderClasses(parent_loader, &classes, &count);
1452 if ( error != JVMTI_ERROR_NONE ) {
1453 jvmtiDeallocate(signature);
1454 return error;
1455 }
1456
1457 for (i=0; i<count; i++) {
1458 jclass clazz;
1459 char *candidate_signature;
1460
1461 clazz = classes[i];
1462 candidate_signature = NULL;
1463 error = classSignature(clazz, &candidate_signature, NULL);
1464 if (error != JVMTI_ERROR_NONE) {
1465 break;
1466 }
1467
1468 if ( is_a_nested_class(signature, (int)len, candidate_signature, '$') ||
1469 is_a_nested_class(signature, (int)len, candidate_signature, '#') ) {
1470 /* Float nested classes to top */
1471 classes[i] = classes[ncount];
1472 classes[ncount++] = clazz;
1473 }
1474 jvmtiDeallocate(candidate_signature);
1475 }
1476
1477 jvmtiDeallocate(signature);
1478
1479 if ( count != 0 && ncount == 0 ) {
1480 jvmtiDeallocate(classes);
1481 classes = NULL;
1482 }
1483
1484 *ppnested = classes;
1485 *pcount = ncount;
1486 return error;
1487 }
1488
1489 void
1490 createLocalRefSpace(JNIEnv *env, jint capacity)
1491 {
1492 /*
1493 * Save current exception since it might get overwritten by
1494 * the calls below. Note we must depend on space in the existing
1495 * frame because asking for a new frame may generate an exception.
1496 */
1497 jobject throwable = JNI_FUNC_PTR(env,ExceptionOccurred)(env);
1498
1499 /*
1500 * Use the current frame if necessary; otherwise create a new one
1501 */
1502 if (JNI_FUNC_PTR(env,PushLocalFrame)(env, capacity) < 0) {
1503 EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY,"PushLocalFrame: Unable to push JNI frame");
1504 }
1505
1506 /*
1507 * TO DO: This could be more efficient if it used EnsureLocalCapacity,
1508 * but that would not work if two functions on the call stack
1509 * use this function. We would need to either track reserved
1510 * references on a per-thread basis or come up with a convention
1511 * that would prevent two functions from depending on this function
1512 * at the same time.
1513 */
1514
1515 /*
1516 * Restore exception state from before call
1517 */
1518 if (throwable != NULL) {
1519 JNI_FUNC_PTR(env,Throw)(env, throwable);
1520 } else {
1521 JNI_FUNC_PTR(env,ExceptionClear)(env);
1522 }
1523 }
1524
1525 jboolean
1526 isClass(jobject object)
1527 {
1528 JNIEnv *env = getEnv();
1529 return JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->classClass);
1530 }
1531
1532 jboolean
1533 isVThread(jobject object)
1534 {
1535 JNIEnv *env = getEnv();
1536 return JNI_FUNC_PTR(env,IsVirtualThread)(env, object);
1537 }
1538
1539 jboolean
1540 isThread(jobject object)
1541 {
1542 JNIEnv *env = getEnv();
1543 return JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->threadClass);
1544 }
1545
1546 jboolean
1547 isThreadGroup(jobject object)
1548 {
1549 JNIEnv *env = getEnv();
1550 return JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->threadGroupClass);
1551 }
1552
1553 jboolean
1554 isString(jobject object)
1555 {
1556 JNIEnv *env = getEnv();
1557 return JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->stringClass);
1558 }
1559
1560 jboolean
1561 isClassLoader(jobject object)
1562 {
1563 JNIEnv *env = getEnv();
1564 return JNI_FUNC_PTR(env,IsInstanceOf)(env, object, gdata->classLoaderClass);
1565 }
1566
1567 jboolean
1568 isArray(jobject object)
1569 {
1570 JNIEnv *env = getEnv();
1571 jboolean is;
1572
1573 WITH_LOCAL_REFS(env, 1) {
1574 jclass clazz;
1575 clazz = JNI_FUNC_PTR(env,GetObjectClass)(env, object);
1576 is = isArrayClass(clazz);
1577 } END_WITH_LOCAL_REFS(env);
1578
1579 return is;
1580 }
1581
1582 /**
1583 * Return property value as jstring
1584 */
1585 static jstring
1586 getPropertyValue(JNIEnv *env, char *propertyName)
1587 {
1588 jstring valueString;
1589 jstring nameString;
1590
1591 valueString = NULL;
1592
1593 /* Create new String object to hold the property name */
1594 nameString = JNI_FUNC_PTR(env,NewStringUTF)(env, propertyName);
1595 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
1596 JNI_FUNC_PTR(env,ExceptionClear)(env);
1597 /* NULL will be returned below */
1598 } else {
1599 /* Call valueString = System.getProperty(nameString) */
1600 valueString = JNI_FUNC_PTR(env,CallStaticObjectMethod)
1601 (env, gdata->systemClass, gdata->systemGetProperty, nameString);
1602 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
1603 JNI_FUNC_PTR(env,ExceptionClear)(env);
1604 valueString = NULL;
1605 }
1606 }
1607 return valueString;
1608 }
1609
1610 /**
1611 * Set an agent property
1612 */
1613 void
1614 setAgentPropertyValue(JNIEnv *env, char *propertyName, char* propertyValue)
1615 {
1616 jstring nameString;
1617 jstring valueString;
1618
1619 if (gdata->agent_properties == NULL) {
1620 /* VMSupport doesn't exist; so ignore */
1621 return;
1622 }
1623
1624 /* Create jstrings for property name and value */
1625 nameString = JNI_FUNC_PTR(env,NewStringUTF)(env, propertyName);
1626 if (nameString != NULL) {
1627 /* convert the value to UTF8 */
1628 int len;
1629 char *utf8value;
1630 int utf8maxSize;
1631
1632 len = (int)strlen(propertyValue);
1633 utf8maxSize = len * 4 + 1;
1634 utf8value = (char *)jvmtiAllocate(utf8maxSize);
1635 if (utf8value != NULL) {
1636 utf8FromPlatform(propertyValue, len, (jbyte *)utf8value, utf8maxSize);
1637 valueString = JNI_FUNC_PTR(env, NewStringUTF)(env, utf8value);
1638 jvmtiDeallocate(utf8value);
1639
1640 if (valueString != NULL) {
1641 /* invoke Properties.setProperty */
1642 JNI_FUNC_PTR(env,CallObjectMethod)
1643 (env, gdata->agent_properties,
1644 gdata->setProperty,
1645 nameString, valueString);
1646 }
1647 }
1648 }
1649 if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) {
1650 JNI_FUNC_PTR(env,ExceptionClear)(env);
1651 }
1652 }
1653
1654 #ifdef DEBUG
1655 // APIs that can be called when debugging the debug agent
1656
1657 #define check_jvmti_status(err, msg) \
1658 if (err != JVMTI_ERROR_NONE) { \
1659 EXIT_ERROR(err, msg); \
1660 }
1661
1662 char*
1663 translateThreadState(jint flags) {
1664 char str[15 * 20];
1665 str[0] = '\0';
1666
1667 if (flags & JVMTI_THREAD_STATE_ALIVE) {
1668 strcat(str, " ALIVE");
1669 }
1670 if (flags & JVMTI_THREAD_STATE_TERMINATED) {
1671 strcat(str, " TERMINATED");
1672 }
1673 if (flags & JVMTI_THREAD_STATE_RUNNABLE) {
1674 strcat(str, " RUNNABLE");
1675 }
1676 if (flags & JVMTI_THREAD_STATE_WAITING) {
1677 strcat(str, " WAITING");
1678 }
1679 if (flags & JVMTI_THREAD_STATE_WAITING_INDEFINITELY) {
1680 strcat(str, " WAITING_INDEFINITELY");
1681 }
1682 if (flags & JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT) {
1683 strcat(str, " WAITING_WITH_TIMEOUT");
1684 }
1685 if (flags & JVMTI_THREAD_STATE_SLEEPING) {
1686 strcat(str, " SLEEPING");
1687 }
1688 if (flags & JVMTI_THREAD_STATE_IN_OBJECT_WAIT) {
1689 strcat(str, " IN_OBJECT_WAIT");
1690 }
1691 if (flags & JVMTI_THREAD_STATE_PARKED) {
1692 strcat(str, " PARKED");
1693 }
1694 if (flags & JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER) {
1695 strcat(str, " BLOCKED_ON_MONITOR_ENTER");
1696 }
1697 if (flags & JVMTI_THREAD_STATE_SUSPENDED) {
1698 strcat(str, " SUSPENDED");
1699 }
1700 if (flags & JVMTI_THREAD_STATE_INTERRUPTED) {
1701 strcat(str, " INTERRUPTED");
1702 }
1703 if (flags & JVMTI_THREAD_STATE_IN_NATIVE) {
1704 strcat(str, " IN_NATIVE");
1705 }
1706
1707 if (strlen(str) == 0) {
1708 strcpy(str, "<none>");
1709 }
1710
1711 char* tstate = (char*)jvmtiAllocate((int)strlen(str) + 1);
1712 strcpy(tstate, str);
1713
1714 return tstate;
1715 }
1716
1717 char*
1718 getThreadName(jthread thread) {
1719 jvmtiThreadInfo thr_info;
1720 jvmtiError err;
1721
1722 memset(&thr_info, 0, sizeof(thr_info));
1723 err = JVMTI_FUNC_PTR(gdata->jvmti,GetThreadInfo)
1724 (gdata->jvmti, thread, &thr_info);
1725 if (err == JVMTI_ERROR_WRONG_PHASE || err == JVMTI_ERROR_THREAD_NOT_ALIVE) {
1726 return NULL; // VM or target thread completed its work
1727 }
1728 check_jvmti_status(err, "getThreadName: error in JVMTI GetThreadInfo call");
1729
1730 char* tname = thr_info.name;
1731 if (tname == NULL) {
1732 const char* UNNAMED_STR = "<Unnamed thread>";
1733 size_t UNNAMED_LEN = strlen(UNNAMED_STR);
1734 tname = (char*)jvmtiAllocate((int)UNNAMED_LEN + 1);
1735 strcpy(tname, UNNAMED_STR);
1736 }
1737 return tname;
1738 }
1739
1740 char*
1741 getMethodName(jmethodID method) {
1742 char* mname = NULL;
1743 jvmtiError err;
1744
1745 err = JVMTI_FUNC_PTR(gdata->jvmti,GetMethodName)
1746 (gdata->jvmti, method, &mname, NULL, NULL);
1747 check_jvmti_status(err, "getMethodName: error in JVMTI GetMethodName call");
1748
1749 return mname;
1750 }
1751
1752 static char*
1753 get_method_class_name(jmethodID method) {
1754 jclass klass = NULL;
1755 char* cname = NULL;
1756 char* result = NULL;
1757 jvmtiError err;
1758
1759 err = JVMTI_FUNC_PTR(gdata->jvmti,GetMethodDeclaringClass)
1760 (gdata->jvmti, method, &klass);
1761 check_jvmti_status(err, "get_method_class_name: error in JVMTI GetMethodDeclaringClass");
1762
1763 err = JVMTI_FUNC_PTR(gdata->jvmti,GetClassSignature)
1764 (gdata->jvmti, klass, &cname, NULL);
1765 check_jvmti_status(err, "get_method_class_name: error in JVMTI GetClassSignature");
1766
1767 size_t len = strlen(cname) - 2; // get rid of leading 'L' and trailing ';'
1768 result = (char*)jvmtiAllocate((int)len + 1);
1769 strncpy(result, cname + 1, len); // skip leading 'L'
1770 result[len] = '\0';
1771 jvmtiDeallocate((void*)cname);
1772 return result;
1773 }
1774
1775 static void
1776 print_method(jmethodID method, jint depth) {
1777 char* cname = NULL;
1778 char* mname = NULL;
1779 char* msign = NULL;
1780 jvmtiError err;
1781
1782 cname = get_method_class_name(method);
1783
1784 err = JVMTI_FUNC_PTR(gdata->jvmti,GetMethodName)
1785 (gdata->jvmti, method, &mname, &msign, NULL);
1786 check_jvmti_status(err, "print_method: error in JVMTI GetMethodName");
1787
1788 tty_message("%2d: %s: %s%s", depth, cname, mname, msign);
1789 jvmtiDeallocate((void*)cname);
1790 jvmtiDeallocate((void*)mname);
1791 jvmtiDeallocate((void*)msign);
1792 }
1793
1794 #define MAX_FRAME_COUNT_PRINT_STACK_TRACE 200
1795
1796 void
1797 printStackTrace(jthread thread) {
1798 jvmtiFrameInfo frames[MAX_FRAME_COUNT_PRINT_STACK_TRACE];
1799 char* tname = getThreadName(thread);
1800 jint count = 0;
1801
1802 jvmtiError err = JVMTI_FUNC_PTR(gdata->jvmti,GetStackTrace)
1803 (gdata->jvmti, thread, 0, MAX_FRAME_COUNT_PRINT_STACK_TRACE, frames, &count);
1804 check_jvmti_status(err, "printStackTrace: error in JVMTI GetStackTrace");
1805
1806 tty_message("JVMTI Stack Trace for thread %s: frame count: %d", tname, count);
1807 for (int depth = 0; depth < count; depth++) {
1808 print_method(frames[depth].method, depth);
1809 }
1810 jvmtiDeallocate((void*)tname);
1811 }
1812
1813 void
1814 printThreadInfo(jthread thread) {
1815 jvmtiThreadInfo thread_info;
1816 jint thread_state;
1817 jvmtiError err;
1818 err = JVMTI_FUNC_PTR(gdata->jvmti,GetThreadInfo)
1819 (gdata->jvmti, thread, &thread_info);
1820 check_jvmti_status(err, "Error in GetThreadInfo");
1821 err = JVMTI_FUNC_PTR(gdata->jvmti,GetThreadState)
1822 (gdata->jvmti, thread, &thread_state);
1823 check_jvmti_status(err, "Error in GetThreadState");
1824 const char* state = translateThreadState(thread_state);
1825 tty_message("Thread: %p, name: %s, state(%x): %s, attrs: %s %s",
1826 thread, thread_info.name, thread_state, state,
1827 (isVThread(thread) ? "virtual": "platform"),
1828 (thread_info.is_daemon ? "daemon": ""));
1829 }
1830
1831 #endif /* DEBUG*/
1832
1833 /**
1834 * Return property value as JDWP allocated string in UTF8 encoding
1835 */
1836 static char *
1837 getPropertyUTF8(JNIEnv *env, char *propertyName)
1838 {
1839 jvmtiError error;
1840 char *value;
1841
1842 value = NULL;
1843 error = JVMTI_FUNC_PTR(gdata->jvmti,GetSystemProperty)
1844 (gdata->jvmti, (const char *)propertyName, &value);
1845 if (error != JVMTI_ERROR_NONE) {
1846 jstring valueString;
1847
1848 value = NULL;
1849 valueString = getPropertyValue(env, propertyName);
1850
1851 if (valueString != NULL) {
1852 const char *utf;
1853
1854 /* Get the UTF8 encoding for this property value string */
1855 utf = JNI_FUNC_PTR(env,GetStringUTFChars)(env, valueString, NULL);
1856 /* Make a copy for returning, release the JNI copy */
1857 value = jvmtiAllocate((int)strlen(utf) + 1);
1858 if (value != NULL) {
1859 (void)strcpy(value, utf);
1860 }
1861 JNI_FUNC_PTR(env,ReleaseStringUTFChars)(env, valueString, utf);
1862 }
1863 }
1864 if ( value == NULL ) {
1865 ERROR_MESSAGE(("JDWP Can't get property value for %s", propertyName));
1866 EXIT_ERROR(AGENT_ERROR_NULL_POINTER,NULL);
1867 }
1868 return value;
1869 }
1870
1871 jboolean
1872 isMethodObsolete(jmethodID method)
1873 {
1874 jvmtiError error;
1875 jboolean obsolete = JNI_TRUE;
1876
1877 if ( method != NULL ) {
1878 error = JVMTI_FUNC_PTR(gdata->jvmti,IsMethodObsolete)
1879 (gdata->jvmti, method, &obsolete);
1880 if (error != JVMTI_ERROR_NONE) {
1881 obsolete = JNI_TRUE;
1882 }
1883 }
1884 return obsolete;
1885 }
1886
1887 /* Get the jvmti environment to be used with tags */
1888 jvmtiEnv *
1889 getSpecialJvmti(void)
1890 {
1891 jvmtiEnv *jvmti;
1892 jvmtiError error;
1893 int rc;
1894
1895 /* Get one time use JVMTI Env */
1896 jvmtiCapabilities caps;
1897
1898 rc = JVM_FUNC_PTR(gdata->jvm,GetEnv)
1899 (gdata->jvm, (void **)&jvmti, JVMTI_VERSION);
1900 if (rc != JNI_OK) {
1901 return NULL;
1902 }
1903 (void)memset(&caps, 0, (int)sizeof(caps));
1904 caps.can_tag_objects = 1;
1905 error = JVMTI_FUNC_PTR(jvmti,AddCapabilities)(jvmti, &caps);
1906 if ( error != JVMTI_ERROR_NONE ) {
1907 return NULL;
1908 }
1909 return jvmti;
1910 }
1911
1912 void
1913 writeCodeLocation(PacketOutputStream *out, jclass clazz,
1914 jmethodID method, jlocation location)
1915 {
1916 jbyte tag;
1917
1918 if (clazz != NULL) {
1919 tag = referenceTypeTag(clazz);
1920 } else {
1921 tag = JDWP_TYPE_TAG(CLASS);
1922 }
1923 (void)outStream_writeByte(out, tag);
1924 (void)outStream_writeObjectRef(getEnv(), out, clazz);
1925 (void)outStream_writeMethodID(out, isMethodObsolete(method)?NULL:method);
1926 (void)outStream_writeLocation(out, location);
1927 }
1928
1929 void *
1930 jvmtiAllocate(jint numBytes)
1931 {
1932 void *ptr;
1933 jvmtiError error;
1934 if ( numBytes == 0 ) {
1935 return NULL;
1936 }
1937 error = JVMTI_FUNC_PTR(gdata->jvmti,Allocate)
1938 (gdata->jvmti, numBytes, (unsigned char**)&ptr);
1939 if (error != JVMTI_ERROR_NONE ) {
1940 EXIT_ERROR(error, "Can't allocate jvmti memory");
1941 }
1942 return ptr;
1943 }
1944
1945 void
1946 jvmtiDeallocate(void *ptr)
1947 {
1948 jvmtiError error;
1949 if ( ptr == NULL ) {
1950 return;
1951 }
1952 error = JVMTI_FUNC_PTR(gdata->jvmti,Deallocate)
1953 (gdata->jvmti, ptr);
1954 if (error != JVMTI_ERROR_NONE ) {
1955 EXIT_ERROR(error, "Can't deallocate jvmti memory");
1956 }
1957 }
1958
1959 /* Rarely needed, transport library uses JDWP errors, only use? */
1960 jvmtiError
1961 map2jvmtiError(jdwpError error)
1962 {
1963 switch ( error ) {
1964 case JDWP_ERROR(NONE):
1965 return JVMTI_ERROR_NONE;
1966 case JDWP_ERROR(INVALID_THREAD):
1967 return JVMTI_ERROR_INVALID_THREAD;
1968 case JDWP_ERROR(INVALID_THREAD_GROUP):
1969 return JVMTI_ERROR_INVALID_THREAD_GROUP;
1970 case JDWP_ERROR(INVALID_PRIORITY):
1971 return JVMTI_ERROR_INVALID_PRIORITY;
1972 case JDWP_ERROR(THREAD_NOT_SUSPENDED):
1973 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1974 case JDWP_ERROR(THREAD_SUSPENDED):
1975 return JVMTI_ERROR_THREAD_SUSPENDED;
1976 case JDWP_ERROR(INVALID_OBJECT):
1977 return JVMTI_ERROR_INVALID_OBJECT;
1978 case JDWP_ERROR(INVALID_CLASS):
1979 return JVMTI_ERROR_INVALID_CLASS;
1980 case JDWP_ERROR(CLASS_NOT_PREPARED):
1981 return JVMTI_ERROR_CLASS_NOT_PREPARED;
1982 case JDWP_ERROR(INVALID_METHODID):
1983 return JVMTI_ERROR_INVALID_METHODID;
1984 case JDWP_ERROR(INVALID_LOCATION):
1985 return JVMTI_ERROR_INVALID_LOCATION;
1986 case JDWP_ERROR(INVALID_FIELDID):
1987 return JVMTI_ERROR_INVALID_FIELDID;
1988 case JDWP_ERROR(INVALID_FRAMEID):
1989 return AGENT_ERROR_INVALID_FRAMEID;
1990 case JDWP_ERROR(NO_MORE_FRAMES):
1991 return JVMTI_ERROR_NO_MORE_FRAMES;
1992 case JDWP_ERROR(OPAQUE_FRAME):
1993 return JVMTI_ERROR_OPAQUE_FRAME;
1994 case JDWP_ERROR(NOT_CURRENT_FRAME):
1995 return AGENT_ERROR_NOT_CURRENT_FRAME;
1996 case JDWP_ERROR(TYPE_MISMATCH):
1997 return JVMTI_ERROR_TYPE_MISMATCH;
1998 case JDWP_ERROR(INVALID_SLOT):
1999 return JVMTI_ERROR_INVALID_SLOT;
2000 case JDWP_ERROR(DUPLICATE):
2001 return JVMTI_ERROR_DUPLICATE;
2002 case JDWP_ERROR(NOT_FOUND):
2003 return JVMTI_ERROR_NOT_FOUND;
2004 case JDWP_ERROR(INVALID_MONITOR):
2005 return JVMTI_ERROR_INVALID_MONITOR;
2006 case JDWP_ERROR(NOT_MONITOR_OWNER):
2007 return JVMTI_ERROR_NOT_MONITOR_OWNER;
2008 case JDWP_ERROR(INTERRUPT):
2009 return JVMTI_ERROR_INTERRUPT;
2010 case JDWP_ERROR(INVALID_CLASS_FORMAT):
2011 return JVMTI_ERROR_INVALID_CLASS_FORMAT;
2012 case JDWP_ERROR(CIRCULAR_CLASS_DEFINITION):
2013 return JVMTI_ERROR_CIRCULAR_CLASS_DEFINITION;
2014 case JDWP_ERROR(FAILS_VERIFICATION):
2015 return JVMTI_ERROR_FAILS_VERIFICATION;
2016 case JDWP_ERROR(ADD_METHOD_NOT_IMPLEMENTED):
2017 return JVMTI_ERROR_UNSUPPORTED_REDEFINITION_METHOD_ADDED;
2018 case JDWP_ERROR(SCHEMA_CHANGE_NOT_IMPLEMENTED):
2019 return JVMTI_ERROR_UNSUPPORTED_REDEFINITION_SCHEMA_CHANGED;
2020 case JDWP_ERROR(INVALID_TYPESTATE):
2021 return JVMTI_ERROR_INVALID_TYPESTATE;
2022 case JDWP_ERROR(HIERARCHY_CHANGE_NOT_IMPLEMENTED):
2023 return JVMTI_ERROR_UNSUPPORTED_REDEFINITION_HIERARCHY_CHANGED;
2024 case JDWP_ERROR(DELETE_METHOD_NOT_IMPLEMENTED):
2025 return JVMTI_ERROR_UNSUPPORTED_REDEFINITION_METHOD_DELETED;
2026 case JDWP_ERROR(UNSUPPORTED_VERSION):
2027 return JVMTI_ERROR_UNSUPPORTED_VERSION;
2028 case JDWP_ERROR(NAMES_DONT_MATCH):
2029 return JVMTI_ERROR_NAMES_DONT_MATCH;
2030 case JDWP_ERROR(CLASS_MODIFIERS_CHANGE_NOT_IMPLEMENTED):
2031 return JVMTI_ERROR_UNSUPPORTED_REDEFINITION_CLASS_MODIFIERS_CHANGED;
2032 case JDWP_ERROR(METHOD_MODIFIERS_CHANGE_NOT_IMPLEMENTED):
2033 return JVMTI_ERROR_UNSUPPORTED_REDEFINITION_METHOD_MODIFIERS_CHANGED;
2034 case JDWP_ERROR(CLASS_ATTRIBUTE_CHANGE_NOT_IMPLEMENTED):
2035 return JVMTI_ERROR_UNSUPPORTED_REDEFINITION_CLASS_ATTRIBUTE_CHANGED;
2036 case JDWP_ERROR(NOT_IMPLEMENTED):
2037 return JVMTI_ERROR_NOT_AVAILABLE;
2038 case JDWP_ERROR(NULL_POINTER):
2039 return JVMTI_ERROR_NULL_POINTER;
2040 case JDWP_ERROR(ABSENT_INFORMATION):
2041 return JVMTI_ERROR_ABSENT_INFORMATION;
2042 case JDWP_ERROR(INVALID_EVENT_TYPE):
2043 return JVMTI_ERROR_INVALID_EVENT_TYPE;
2044 case JDWP_ERROR(ILLEGAL_ARGUMENT):
2045 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2046 case JDWP_ERROR(OUT_OF_MEMORY):
2047 return JVMTI_ERROR_OUT_OF_MEMORY;
2048 case JDWP_ERROR(ACCESS_DENIED):
2049 return JVMTI_ERROR_ACCESS_DENIED;
2050 case JDWP_ERROR(VM_DEAD):
2051 return JVMTI_ERROR_WRONG_PHASE;
2052 case JDWP_ERROR(UNATTACHED_THREAD):
2053 return JVMTI_ERROR_UNATTACHED_THREAD;
2054 case JDWP_ERROR(INVALID_TAG):
2055 return AGENT_ERROR_INVALID_TAG;
2056 case JDWP_ERROR(ALREADY_INVOKING):
2057 return AGENT_ERROR_ALREADY_INVOKING;
2058 case JDWP_ERROR(INVALID_INDEX):
2059 return AGENT_ERROR_INVALID_INDEX;
2060 case JDWP_ERROR(INVALID_LENGTH):
2061 return AGENT_ERROR_INVALID_LENGTH;
2062 case JDWP_ERROR(INVALID_STRING):
2063 return AGENT_ERROR_INVALID_STRING;
2064 case JDWP_ERROR(INVALID_CLASS_LOADER):
2065 return AGENT_ERROR_INVALID_CLASS_LOADER;
2066 case JDWP_ERROR(INVALID_ARRAY):
2067 return AGENT_ERROR_INVALID_ARRAY;
2068 case JDWP_ERROR(TRANSPORT_LOAD):
2069 return AGENT_ERROR_TRANSPORT_LOAD;
2070 case JDWP_ERROR(TRANSPORT_INIT):
2071 return AGENT_ERROR_TRANSPORT_INIT;
2072 case JDWP_ERROR(NATIVE_METHOD):
2073 return AGENT_ERROR_NATIVE_METHOD;
2074 case JDWP_ERROR(INVALID_COUNT):
2075 return AGENT_ERROR_INVALID_COUNT;
2076 case JDWP_ERROR(INTERNAL):
2077 return AGENT_ERROR_JDWP_INTERNAL;
2078 }
2079 return AGENT_ERROR_INTERNAL;
2080 }
2081
2082 static jvmtiEvent index2jvmti[EI_max-EI_min+1];
2083 static jdwpEvent index2jdwp [EI_max-EI_min+1];
2084
2085 void
2086 eventIndexInit(void)
2087 {
2088 (void)memset(index2jvmti, 0, (int)sizeof(index2jvmti));
2089 (void)memset(index2jdwp, 0, (int)sizeof(index2jdwp));
2090
2091 index2jvmti[EI_SINGLE_STEP -EI_min] = JVMTI_EVENT_SINGLE_STEP;
2092 index2jvmti[EI_BREAKPOINT -EI_min] = JVMTI_EVENT_BREAKPOINT;
2093 index2jvmti[EI_FRAME_POP -EI_min] = JVMTI_EVENT_FRAME_POP;
2094 index2jvmti[EI_EXCEPTION -EI_min] = JVMTI_EVENT_EXCEPTION;
2095 index2jvmti[EI_THREAD_START -EI_min] = JVMTI_EVENT_THREAD_START;
2096 index2jvmti[EI_THREAD_END -EI_min] = JVMTI_EVENT_THREAD_END;
2097 index2jvmti[EI_CLASS_PREPARE -EI_min] = JVMTI_EVENT_CLASS_PREPARE;
2098 index2jvmti[EI_CLASS_UNLOAD -EI_min] = 0; // No mapping to JVMTI event
2099 index2jvmti[EI_CLASS_LOAD -EI_min] = JVMTI_EVENT_CLASS_LOAD;
2100 index2jvmti[EI_FIELD_ACCESS -EI_min] = JVMTI_EVENT_FIELD_ACCESS;
2101 index2jvmti[EI_FIELD_MODIFICATION -EI_min] = JVMTI_EVENT_FIELD_MODIFICATION;
2102 index2jvmti[EI_EXCEPTION_CATCH -EI_min] = JVMTI_EVENT_EXCEPTION_CATCH;
2103 index2jvmti[EI_METHOD_ENTRY -EI_min] = JVMTI_EVENT_METHOD_ENTRY;
2104 index2jvmti[EI_METHOD_EXIT -EI_min] = JVMTI_EVENT_METHOD_EXIT;
2105 index2jvmti[EI_MONITOR_CONTENDED_ENTER -EI_min] = JVMTI_EVENT_MONITOR_CONTENDED_ENTER;
2106 index2jvmti[EI_MONITOR_CONTENDED_ENTERED -EI_min] = JVMTI_EVENT_MONITOR_CONTENDED_ENTERED;
2107 index2jvmti[EI_MONITOR_WAIT -EI_min] = JVMTI_EVENT_MONITOR_WAIT;
2108 index2jvmti[EI_MONITOR_WAITED -EI_min] = JVMTI_EVENT_MONITOR_WAITED;
2109 index2jvmti[EI_VM_INIT -EI_min] = JVMTI_EVENT_VM_INIT;
2110 index2jvmti[EI_VM_DEATH -EI_min] = JVMTI_EVENT_VM_DEATH;
2111 index2jvmti[EI_VIRTUAL_THREAD_START -EI_min] = JVMTI_EVENT_VIRTUAL_THREAD_START;
2112 index2jvmti[EI_VIRTUAL_THREAD_END -EI_min] = JVMTI_EVENT_VIRTUAL_THREAD_END;
2113
2114 index2jdwp[EI_SINGLE_STEP -EI_min] = JDWP_EVENT(SINGLE_STEP);
2115 index2jdwp[EI_BREAKPOINT -EI_min] = JDWP_EVENT(BREAKPOINT);
2116 index2jdwp[EI_FRAME_POP -EI_min] = JDWP_EVENT(FRAME_POP);
2117 index2jdwp[EI_EXCEPTION -EI_min] = JDWP_EVENT(EXCEPTION);
2118 index2jdwp[EI_THREAD_START -EI_min] = JDWP_EVENT(THREAD_START);
2119 index2jdwp[EI_THREAD_END -EI_min] = JDWP_EVENT(THREAD_END);
2120 index2jdwp[EI_CLASS_PREPARE -EI_min] = JDWP_EVENT(CLASS_PREPARE);
2121 index2jdwp[EI_CLASS_UNLOAD -EI_min] = JDWP_EVENT(CLASS_UNLOAD);
2122 index2jdwp[EI_CLASS_LOAD -EI_min] = JDWP_EVENT(CLASS_LOAD);
2123 index2jdwp[EI_FIELD_ACCESS -EI_min] = JDWP_EVENT(FIELD_ACCESS);
2124 index2jdwp[EI_FIELD_MODIFICATION -EI_min] = JDWP_EVENT(FIELD_MODIFICATION);
2125 index2jdwp[EI_EXCEPTION_CATCH -EI_min] = JDWP_EVENT(EXCEPTION_CATCH);
2126 index2jdwp[EI_METHOD_ENTRY -EI_min] = JDWP_EVENT(METHOD_ENTRY);
2127 index2jdwp[EI_METHOD_EXIT -EI_min] = JDWP_EVENT(METHOD_EXIT);
2128 index2jdwp[EI_MONITOR_CONTENDED_ENTER -EI_min] = JDWP_EVENT(MONITOR_CONTENDED_ENTER);
2129 index2jdwp[EI_MONITOR_CONTENDED_ENTERED -EI_min] = JDWP_EVENT(MONITOR_CONTENDED_ENTERED);
2130 index2jdwp[EI_MONITOR_WAIT -EI_min] = JDWP_EVENT(MONITOR_WAIT);
2131 index2jdwp[EI_MONITOR_WAITED -EI_min] = JDWP_EVENT(MONITOR_WAITED);
2132 index2jdwp[EI_VM_INIT -EI_min] = JDWP_EVENT(VM_INIT);
2133 index2jdwp[EI_VM_DEATH -EI_min] = JDWP_EVENT(VM_DEATH);
2134 /* Just map VIRTUAL_THREAD_START/END to THREAD_START/END. */
2135 index2jdwp[EI_VIRTUAL_THREAD_START -EI_min] = JDWP_EVENT(THREAD_START);
2136 index2jdwp[EI_VIRTUAL_THREAD_END -EI_min] = JDWP_EVENT(THREAD_END);
2137 }
2138
2139 jdwpEvent
2140 eventIndex2jdwp(EventIndex ei)
2141 {
2142 jdwpEvent event = 0;
2143 if (ei >= EI_min && ei <= EI_max) {
2144 event = index2jdwp[ei - EI_min];
2145 }
2146 if (event == 0) {
2147 EXIT_ERROR(AGENT_ERROR_INVALID_INDEX, "bad EventIndex");
2148 }
2149 return event;
2150 }
2151
2152 jvmtiEvent
2153 eventIndex2jvmti(EventIndex ei)
2154 {
2155 jvmtiEvent event = 0;
2156 if (ei >= EI_min && ei <= EI_max) {
2157 event = index2jvmti[ei - EI_min];
2158 }
2159 if (event == 0) {
2160 EXIT_ERROR(AGENT_ERROR_INVALID_INDEX, "bad EventIndex");
2161 }
2162 return event;
2163 }
2164
2165 char*
2166 eventIndex2EventName(EventIndex ei)
2167 {
2168 switch ( ei ) {
2169 case EI_SINGLE_STEP:
2170 return "EI_SINGLE_STEP";
2171 case EI_BREAKPOINT:
2172 return "EI_BREAKPOINT";
2173 case EI_FRAME_POP:
2174 return "EI_FRAME_POP";
2175 case EI_EXCEPTION:
2176 return "EI_EXCEPTION";
2177 case EI_THREAD_START:
2178 return "EI_THREAD_START";
2179 case EI_THREAD_END:
2180 return "EI_THREAD_END";
2181 case EI_CLASS_PREPARE:
2182 return "EI_CLASS_PREPARE";
2183 case EI_CLASS_UNLOAD:
2184 return "EI_CLASS_UNLOAD";
2185 case EI_CLASS_LOAD:
2186 return "EI_CLASS_LOAD";
2187 case EI_FIELD_ACCESS:
2188 return "EI_FIELD_ACCESS";
2189 case EI_FIELD_MODIFICATION:
2190 return "EI_FIELD_MODIFICATION";
2191 case EI_EXCEPTION_CATCH:
2192 return "EI_EXCEPTION_CATCH";
2193 case EI_METHOD_ENTRY:
2194 return "EI_METHOD_ENTRY";
2195 case EI_METHOD_EXIT:
2196 return "EI_METHOD_EXIT";
2197 case EI_MONITOR_CONTENDED_ENTER:
2198 return "EI_MONITOR_CONTENDED_ENTER";
2199 case EI_MONITOR_CONTENDED_ENTERED:
2200 return "EI_MONITOR_CONTENDED_ENTERED";
2201 case EI_MONITOR_WAIT:
2202 return "EI_MONITOR_WAIT";
2203 case EI_MONITOR_WAITED:
2204 return "EI_MONITOR_WAITED";
2205 case EI_VM_INIT:
2206 return "EI_VM_INIT";
2207 case EI_VM_DEATH:
2208 return "EI_VM_DEATH";
2209 case EI_VIRTUAL_THREAD_START:
2210 return "EI_VIRTUAL_THREAD_START";
2211 case EI_VIRTUAL_THREAD_END:
2212 return "EI_VIRTUAL_THREAD_END";
2213 default:
2214 JDI_ASSERT(JNI_FALSE);
2215 return "Bad EI";
2216 }
2217 }
2218
2219 EventIndex
2220 jdwp2EventIndex(jdwpEvent eventType)
2221 {
2222 switch ( eventType ) {
2223 case JDWP_EVENT(SINGLE_STEP):
2224 return EI_SINGLE_STEP;
2225 case JDWP_EVENT(BREAKPOINT):
2226 return EI_BREAKPOINT;
2227 case JDWP_EVENT(FRAME_POP):
2228 return EI_FRAME_POP;
2229 case JDWP_EVENT(EXCEPTION):
2230 return EI_EXCEPTION;
2231 case JDWP_EVENT(THREAD_START):
2232 return EI_THREAD_START;
2233 case JDWP_EVENT(THREAD_END):
2234 return EI_THREAD_END;
2235 case JDWP_EVENT(CLASS_PREPARE):
2236 return EI_CLASS_PREPARE;
2237 case JDWP_EVENT(CLASS_UNLOAD):
2238 return EI_CLASS_UNLOAD;
2239 case JDWP_EVENT(CLASS_LOAD):
2240 return EI_CLASS_LOAD;
2241 case JDWP_EVENT(FIELD_ACCESS):
2242 return EI_FIELD_ACCESS;
2243 case JDWP_EVENT(FIELD_MODIFICATION):
2244 return EI_FIELD_MODIFICATION;
2245 case JDWP_EVENT(EXCEPTION_CATCH):
2246 return EI_EXCEPTION_CATCH;
2247 case JDWP_EVENT(METHOD_ENTRY):
2248 return EI_METHOD_ENTRY;
2249 case JDWP_EVENT(METHOD_EXIT):
2250 return EI_METHOD_EXIT;
2251 case JDWP_EVENT(METHOD_EXIT_WITH_RETURN_VALUE):
2252 return EI_METHOD_EXIT;
2253 case JDWP_EVENT(MONITOR_CONTENDED_ENTER):
2254 return EI_MONITOR_CONTENDED_ENTER;
2255 case JDWP_EVENT(MONITOR_CONTENDED_ENTERED):
2256 return EI_MONITOR_CONTENDED_ENTERED;
2257 case JDWP_EVENT(MONITOR_WAIT):
2258 return EI_MONITOR_WAIT;
2259 case JDWP_EVENT(MONITOR_WAITED):
2260 return EI_MONITOR_WAITED;
2261 case JDWP_EVENT(VM_INIT):
2262 return EI_VM_INIT;
2263 case JDWP_EVENT(VM_DEATH):
2264 return EI_VM_DEATH;
2265 default:
2266 break;
2267 }
2268
2269 /*
2270 * Event type not recognized - don't exit with error as caller
2271 * may wish to return error to debugger.
2272 */
2273 return (EventIndex)0;
2274 }
2275
2276 EventIndex
2277 jvmti2EventIndex(jvmtiEvent kind)
2278 {
2279 switch ( kind ) {
2280 case JVMTI_EVENT_SINGLE_STEP:
2281 return EI_SINGLE_STEP;
2282 case JVMTI_EVENT_BREAKPOINT:
2283 return EI_BREAKPOINT;
2284 case JVMTI_EVENT_FRAME_POP:
2285 return EI_FRAME_POP;
2286 case JVMTI_EVENT_EXCEPTION:
2287 return EI_EXCEPTION;
2288 case JVMTI_EVENT_THREAD_START:
2289 return EI_THREAD_START;
2290 case JVMTI_EVENT_THREAD_END:
2291 return EI_THREAD_END;
2292 case JVMTI_EVENT_CLASS_PREPARE:
2293 return EI_CLASS_PREPARE;
2294 case JVMTI_EVENT_CLASS_LOAD:
2295 return EI_CLASS_LOAD;
2296 case JVMTI_EVENT_FIELD_ACCESS:
2297 return EI_FIELD_ACCESS;
2298 case JVMTI_EVENT_FIELD_MODIFICATION:
2299 return EI_FIELD_MODIFICATION;
2300 case JVMTI_EVENT_EXCEPTION_CATCH:
2301 return EI_EXCEPTION_CATCH;
2302 case JVMTI_EVENT_METHOD_ENTRY:
2303 return EI_METHOD_ENTRY;
2304 case JVMTI_EVENT_METHOD_EXIT:
2305 return EI_METHOD_EXIT;
2306 /*
2307 * There is no JVMTI_EVENT_METHOD_EXIT_WITH_RETURN_VALUE.
2308 * The normal JVMTI_EVENT_METHOD_EXIT always contains the return value.
2309 */
2310 case JVMTI_EVENT_MONITOR_CONTENDED_ENTER:
2311 return EI_MONITOR_CONTENDED_ENTER;
2312 case JVMTI_EVENT_MONITOR_CONTENDED_ENTERED:
2313 return EI_MONITOR_CONTENDED_ENTERED;
2314 case JVMTI_EVENT_MONITOR_WAIT:
2315 return EI_MONITOR_WAIT;
2316 case JVMTI_EVENT_MONITOR_WAITED:
2317 return EI_MONITOR_WAITED;
2318 case JVMTI_EVENT_VM_INIT:
2319 return EI_VM_INIT;
2320 case JVMTI_EVENT_VM_DEATH:
2321 return EI_VM_DEATH;
2322 /* vthread events */
2323 case JVMTI_EVENT_VIRTUAL_THREAD_START:
2324 return EI_VIRTUAL_THREAD_START;
2325 case JVMTI_EVENT_VIRTUAL_THREAD_END:
2326 return EI_VIRTUAL_THREAD_END;
2327
2328 default:
2329 EXIT_ERROR(AGENT_ERROR_INVALID_INDEX,"JVMTI to EventIndex mapping");
2330 break;
2331 }
2332 return (EventIndex)0;
2333 }
2334
2335 /* This routine is commonly used, maps jvmti and agent errors to the best
2336 * jdwp error code we can map to.
2337 */
2338 jdwpError
2339 map2jdwpError(jvmtiError error)
2340 {
2341 switch ( (int)error ) {
2342 case JVMTI_ERROR_NONE:
2343 return JDWP_ERROR(NONE);
2344 case AGENT_ERROR_INVALID_THREAD:
2345 case JVMTI_ERROR_INVALID_THREAD:
2346 return JDWP_ERROR(INVALID_THREAD);
2347 case JVMTI_ERROR_INVALID_THREAD_GROUP:
2348 return JDWP_ERROR(INVALID_THREAD_GROUP);
2349 case JVMTI_ERROR_INVALID_PRIORITY:
2350 return JDWP_ERROR(INVALID_PRIORITY);
2351 case JVMTI_ERROR_THREAD_NOT_SUSPENDED:
2352 return JDWP_ERROR(THREAD_NOT_SUSPENDED);
2353 case JVMTI_ERROR_THREAD_SUSPENDED:
2354 return JDWP_ERROR(THREAD_SUSPENDED);
2355 case JVMTI_ERROR_THREAD_NOT_ALIVE:
2356 return JDWP_ERROR(INVALID_THREAD);
2357 case AGENT_ERROR_INVALID_OBJECT:
2358 case JVMTI_ERROR_INVALID_OBJECT:
2359 return JDWP_ERROR(INVALID_OBJECT);
2360 case JVMTI_ERROR_INVALID_CLASS:
2361 return JDWP_ERROR(INVALID_CLASS);
2362 case JVMTI_ERROR_CLASS_NOT_PREPARED:
2363 return JDWP_ERROR(CLASS_NOT_PREPARED);
2364 case JVMTI_ERROR_INVALID_METHODID:
2365 return JDWP_ERROR(INVALID_METHODID);
2366 case JVMTI_ERROR_INVALID_LOCATION:
2367 return JDWP_ERROR(INVALID_LOCATION);
2368 case JVMTI_ERROR_INVALID_FIELDID:
2369 return JDWP_ERROR(INVALID_FIELDID);
2370 case AGENT_ERROR_NO_MORE_FRAMES:
2371 case JVMTI_ERROR_NO_MORE_FRAMES:
2372 return JDWP_ERROR(NO_MORE_FRAMES);
2373 case JVMTI_ERROR_OPAQUE_FRAME:
2374 return JDWP_ERROR(OPAQUE_FRAME);
2375 case JVMTI_ERROR_TYPE_MISMATCH:
2376 return JDWP_ERROR(TYPE_MISMATCH);
2377 case JVMTI_ERROR_INVALID_SLOT:
2378 return JDWP_ERROR(INVALID_SLOT);
2379 case JVMTI_ERROR_DUPLICATE:
2380 return JDWP_ERROR(DUPLICATE);
2381 case JVMTI_ERROR_NOT_FOUND:
2382 return JDWP_ERROR(NOT_FOUND);
2383 case JVMTI_ERROR_INVALID_MONITOR:
2384 return JDWP_ERROR(INVALID_MONITOR);
2385 case JVMTI_ERROR_NOT_MONITOR_OWNER:
2386 return JDWP_ERROR(NOT_MONITOR_OWNER);
2387 case JVMTI_ERROR_INTERRUPT:
2388 return JDWP_ERROR(INTERRUPT);
2389 case JVMTI_ERROR_INVALID_CLASS_FORMAT:
2390 return JDWP_ERROR(INVALID_CLASS_FORMAT);
2391 case JVMTI_ERROR_CIRCULAR_CLASS_DEFINITION:
2392 return JDWP_ERROR(CIRCULAR_CLASS_DEFINITION);
2393 case JVMTI_ERROR_FAILS_VERIFICATION:
2394 return JDWP_ERROR(FAILS_VERIFICATION);
2395 case JVMTI_ERROR_INVALID_TYPESTATE:
2396 return JDWP_ERROR(INVALID_TYPESTATE);
2397 case JVMTI_ERROR_UNSUPPORTED_VERSION:
2398 return JDWP_ERROR(UNSUPPORTED_VERSION);
2399 case JVMTI_ERROR_NAMES_DONT_MATCH:
2400 return JDWP_ERROR(NAMES_DONT_MATCH);
2401 case AGENT_ERROR_NULL_POINTER:
2402 case JVMTI_ERROR_NULL_POINTER:
2403 return JDWP_ERROR(NULL_POINTER);
2404 case JVMTI_ERROR_ABSENT_INFORMATION:
2405 return JDWP_ERROR(ABSENT_INFORMATION);
2406 case AGENT_ERROR_INVALID_EVENT_TYPE:
2407 case JVMTI_ERROR_INVALID_EVENT_TYPE:
2408 return JDWP_ERROR(INVALID_EVENT_TYPE);
2409 case AGENT_ERROR_ILLEGAL_ARGUMENT:
2410 case JVMTI_ERROR_ILLEGAL_ARGUMENT:
2411 return JDWP_ERROR(ILLEGAL_ARGUMENT);
2412 case JVMTI_ERROR_OUT_OF_MEMORY:
2413 case AGENT_ERROR_OUT_OF_MEMORY:
2414 return JDWP_ERROR(OUT_OF_MEMORY);
2415 case JVMTI_ERROR_ACCESS_DENIED:
2416 return JDWP_ERROR(ACCESS_DENIED);
2417 case JVMTI_ERROR_WRONG_PHASE:
2418 case AGENT_ERROR_VM_DEAD:
2419 case AGENT_ERROR_NO_JNI_ENV:
2420 return JDWP_ERROR(VM_DEAD);
2421 case AGENT_ERROR_JNI_EXCEPTION:
2422 case JVMTI_ERROR_UNATTACHED_THREAD:
2423 return JDWP_ERROR(UNATTACHED_THREAD);
2424 case JVMTI_ERROR_NOT_AVAILABLE:
2425 case JVMTI_ERROR_MUST_POSSESS_CAPABILITY:
2426 return JDWP_ERROR(NOT_IMPLEMENTED);
2427 case JVMTI_ERROR_UNSUPPORTED_REDEFINITION_HIERARCHY_CHANGED:
2428 return JDWP_ERROR(HIERARCHY_CHANGE_NOT_IMPLEMENTED);
2429 case JVMTI_ERROR_UNSUPPORTED_REDEFINITION_METHOD_DELETED:
2430 return JDWP_ERROR(DELETE_METHOD_NOT_IMPLEMENTED);
2431 case JVMTI_ERROR_UNSUPPORTED_REDEFINITION_METHOD_ADDED:
2432 return JDWP_ERROR(ADD_METHOD_NOT_IMPLEMENTED);
2433 case JVMTI_ERROR_UNSUPPORTED_REDEFINITION_SCHEMA_CHANGED:
2434 return JDWP_ERROR(SCHEMA_CHANGE_NOT_IMPLEMENTED);
2435 case JVMTI_ERROR_UNSUPPORTED_REDEFINITION_CLASS_MODIFIERS_CHANGED:
2436 return JDWP_ERROR(CLASS_MODIFIERS_CHANGE_NOT_IMPLEMENTED);
2437 case JVMTI_ERROR_UNSUPPORTED_REDEFINITION_METHOD_MODIFIERS_CHANGED:
2438 return JDWP_ERROR(METHOD_MODIFIERS_CHANGE_NOT_IMPLEMENTED);
2439 case JVMTI_ERROR_UNSUPPORTED_REDEFINITION_CLASS_ATTRIBUTE_CHANGED:
2440 return JDWP_ERROR(CLASS_ATTRIBUTE_CHANGE_NOT_IMPLEMENTED);
2441 case JVMTI_ERROR_UNSUPPORTED_OPERATION:
2442 return JDWP_ERROR(NOT_IMPLEMENTED);
2443 case AGENT_ERROR_NOT_CURRENT_FRAME:
2444 return JDWP_ERROR(NOT_CURRENT_FRAME);
2445 case AGENT_ERROR_INVALID_TAG:
2446 return JDWP_ERROR(INVALID_TAG);
2447 case AGENT_ERROR_ALREADY_INVOKING:
2448 return JDWP_ERROR(ALREADY_INVOKING);
2449 case AGENT_ERROR_INVALID_INDEX:
2450 return JDWP_ERROR(INVALID_INDEX);
2451 case AGENT_ERROR_INVALID_LENGTH:
2452 return JDWP_ERROR(INVALID_LENGTH);
2453 case AGENT_ERROR_INVALID_STRING:
2454 return JDWP_ERROR(INVALID_STRING);
2455 case AGENT_ERROR_INVALID_CLASS_LOADER:
2456 return JDWP_ERROR(INVALID_CLASS_LOADER);
2457 case AGENT_ERROR_INVALID_ARRAY:
2458 return JDWP_ERROR(INVALID_ARRAY);
2459 case AGENT_ERROR_TRANSPORT_LOAD:
2460 return JDWP_ERROR(TRANSPORT_LOAD);
2461 case AGENT_ERROR_TRANSPORT_INIT:
2462 return JDWP_ERROR(TRANSPORT_INIT);
2463 case AGENT_ERROR_NATIVE_METHOD:
2464 return JDWP_ERROR(NATIVE_METHOD);
2465 case AGENT_ERROR_INVALID_COUNT:
2466 return JDWP_ERROR(INVALID_COUNT);
2467 case AGENT_ERROR_INVALID_FRAMEID:
2468 return JDWP_ERROR(INVALID_FRAMEID);
2469 case JVMTI_ERROR_INTERNAL:
2470 case JVMTI_ERROR_INVALID_ENVIRONMENT:
2471 case AGENT_ERROR_INTERNAL:
2472 case AGENT_ERROR_JVMTI_INTERNAL:
2473 case AGENT_ERROR_JDWP_INTERNAL:
2474 return JDWP_ERROR(INTERNAL);
2475 default:
2476 break;
2477 }
2478 return JDWP_ERROR(INTERNAL);
2479 }
2480
2481 jint
2482 map2jdwpSuspendStatus(jint state)
2483 {
2484 jint status = 0;
2485 if ( ( state & JVMTI_THREAD_STATE_SUSPENDED ) != 0 ) {
2486 status = JDWP_SUSPEND_STATUS(SUSPENDED);
2487 }
2488 return status;
2489 }
2490
2491 jdwpThreadStatus
2492 map2jdwpThreadStatus(jint state)
2493 {
2494 jdwpThreadStatus status;
2495
2496 status = (jdwpThreadStatus)(-1);
2497
2498 if ( ! ( state & JVMTI_THREAD_STATE_ALIVE ) ) {
2499 if ( state & JVMTI_THREAD_STATE_TERMINATED ) {
2500 status = JDWP_THREAD_STATUS(ZOMBIE);
2501 } else {
2502 /* FIXUP? New JDWP #define for not started? */
2503 status = (jdwpThreadStatus)(-1);
2504 }
2505 } else {
2506 if ( state & JVMTI_THREAD_STATE_SLEEPING ) {
2507 status = JDWP_THREAD_STATUS(SLEEPING);
2508 } else if ( state & JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER ) {
2509 status = JDWP_THREAD_STATUS(MONITOR);
2510 } else if ( state & JVMTI_THREAD_STATE_WAITING ) {
2511 status = JDWP_THREAD_STATUS(WAIT);
2512 } else if ( state & JVMTI_THREAD_STATE_RUNNABLE ) {
2513 status = JDWP_THREAD_STATUS(RUNNING);
2514 }
2515 }
2516 return status;
2517 }
2518
2519 jint
2520 map2jdwpClassStatus(jint classStatus)
2521 {
2522 jint status = 0;
2523 if ( ( classStatus & JVMTI_CLASS_STATUS_VERIFIED ) != 0 ) {
2524 status |= JDWP_CLASS_STATUS(VERIFIED);
2525 }
2526 if ( ( classStatus & JVMTI_CLASS_STATUS_PREPARED ) != 0 ) {
2527 status |= JDWP_CLASS_STATUS(PREPARED);
2528 }
2529 if ( ( classStatus & JVMTI_CLASS_STATUS_INITIALIZED ) != 0 ) {
2530 status |= JDWP_CLASS_STATUS(INITIALIZED);
2531 }
2532 if ( ( classStatus & JVMTI_CLASS_STATUS_ERROR ) != 0 ) {
2533 status |= JDWP_CLASS_STATUS(ERROR);
2534 }
2535 return status;
2536 }
2537
2538 void
2539 log_debugee_location(const char *func,
2540 jthread thread, jmethodID method, jlocation location)
2541 {
2542 int logging_locations = LOG_TEST(JDWP_LOG_LOC);
2543
2544 if ( logging_locations ) {
2545 char *method_name;
2546 char *class_sig;
2547 jvmtiError error;
2548 jvmtiThreadInfo info;
2549 jint state;
2550
2551 /* Get thread information */
2552 info.name = NULL;
2553 error = FUNC_PTR(gdata->jvmti,GetThreadInfo)
2554 (gdata->jvmti, thread, &info);
2555 if ( error != JVMTI_ERROR_NONE) {
2556 info.name = NULL;
2557 }
2558 error = FUNC_PTR(gdata->jvmti,GetThreadState)
2559 (gdata->jvmti, thread, &state);
2560 if ( error != JVMTI_ERROR_NONE) {
2561 state = 0;
2562 }
2563
2564 /* Get method if necessary */
2565 if ( method==NULL ) {
2566 error = FUNC_PTR(gdata->jvmti,GetFrameLocation)
2567 (gdata->jvmti, thread, 0, &method, &location);
2568 if ( error != JVMTI_ERROR_NONE ) {
2569 method = NULL;
2570 location = 0;
2571 }
2572 }
2573
2574 /* Get method name */
2575 method_name = NULL;
2576 if ( method != NULL ) {
2577 error = methodSignature(method, &method_name, NULL, NULL);
2578 if ( error != JVMTI_ERROR_NONE ) {
2579 method_name = NULL;
2580 }
2581 }
2582
2583 /* Get class signature */
2584 class_sig = NULL;
2585 if ( method != NULL ) {
2586 jclass clazz;
2587
2588 error = methodClass(method, &clazz);
2589 if ( error == JVMTI_ERROR_NONE ) {
2590 error = classSignature(clazz, &class_sig, NULL);
2591 if ( error != JVMTI_ERROR_NONE ) {
2592 class_sig = NULL;
2593 }
2594 }
2595 }
2596
2597 /* Issue log message */
2598 LOG_LOC(("%s: debuggee: thread=%p(%s:0x%x),method=%p(%s@%d;%s)",
2599 func,
2600 thread, info.name==NULL ? "?" : info.name, state,
2601 method, method_name==NULL ? "?" : method_name,
2602 (int)location, class_sig==NULL ? "?" : class_sig));
2603
2604 /* Free memory */
2605 if ( class_sig != NULL ) {
2606 jvmtiDeallocate(class_sig);
2607 }
2608 if ( method_name != NULL ) {
2609 jvmtiDeallocate(method_name);
2610 }
2611 if ( info.name != NULL ) {
2612 jvmtiDeallocate(info.name);
2613 }
2614 }
2615 }
2616
2617 /* ********************************************************************* */
2618 /* JDK 6.0: Use of new Heap Iteration functions */
2619 /* ********************************************************************* */
2620
2621 /* ********************************************************************* */
2622 /* Instances */
2623
2624 /* Structure to hold class instances heap iteration data (arg user_data) */
2625 typedef struct ClassInstancesData {
2626 jint instCount;
2627 jint maxInstances;
2628 jlong objTag;
2629 jvmtiError error;
2630 } ClassInstancesData;
2631
2632 /* Callback for instance object tagging (heap_reference_callback). */
2633 static jint JNICALL
2634 cbObjectTagInstance(jvmtiHeapReferenceKind reference_kind,
2635 const jvmtiHeapReferenceInfo* reference_info, jlong class_tag,
2636 jlong referrer_class_tag, jlong size,
2637 jlong* tag_ptr, jlong* referrer_tag_ptr, jint length, void* user_data)
2638 {
2639 ClassInstancesData *data;
2640
2641 /* Check data structure */
2642 data = (ClassInstancesData*)user_data;
2643 if (data == NULL) {
2644 return JVMTI_VISIT_ABORT;
2645 }
2646
2647 /* If we have tagged enough objects, just abort */
2648 if ( data->maxInstances != 0 && data->instCount >= data->maxInstances ) {
2649 return JVMTI_VISIT_ABORT;
2650 }
2651
2652 /* If tagged already, just continue */
2653 if ( (*tag_ptr) != (jlong)0 ) {
2654 return JVMTI_VISIT_OBJECTS;
2655 }
2656
2657 /* Tag the object so we don't count it again, and so we can retrieve it */
2658 (*tag_ptr) = data->objTag;
2659 data->instCount++;
2660 return JVMTI_VISIT_OBJECTS;
2661 }
2662
2663 /* Get instances for one class */
2664 jvmtiError
2665 classInstances(jclass klass, ObjectBatch *instances, int maxInstances)
2666 {
2667 ClassInstancesData data;
2668 jvmtiHeapCallbacks heap_callbacks;
2669 jvmtiError error;
2670 jvmtiEnv *jvmti;
2671
2672 /* Check interface assumptions */
2673
2674 if (klass == NULL) {
2675 return AGENT_ERROR_INVALID_OBJECT;
2676 }
2677
2678 if ( maxInstances < 0 || instances == NULL) {
2679 return AGENT_ERROR_ILLEGAL_ARGUMENT;
2680 }
2681
2682 /* Initialize return information */
2683 instances->count = 0;
2684 instances->objects = NULL;
2685
2686 /* Get jvmti environment to use */
2687 jvmti = getSpecialJvmti();
2688 if ( jvmti == NULL ) {
2689 return AGENT_ERROR_INTERNAL;
2690 }
2691
2692 /* Setup data to passed around the callbacks */
2693 data.instCount = 0;
2694 data.maxInstances = maxInstances;
2695 data.objTag = (jlong)1;
2696 data.error = JVMTI_ERROR_NONE;
2697
2698 /* Clear out callbacks structure */
2699 (void)memset(&heap_callbacks,0,sizeof(heap_callbacks));
2700
2701 /* Set the callbacks we want */
2702 heap_callbacks.heap_reference_callback = &cbObjectTagInstance;
2703
2704 /* Follow references, no initiating object, just this class, all objects */
2705 error = JVMTI_FUNC_PTR(jvmti,FollowReferences)
2706 (jvmti, 0, klass, NULL, &heap_callbacks, &data);
2707 if ( error == JVMTI_ERROR_NONE ) {
2708 error = data.error;
2709 }
2710
2711 /* Get all the instances now that they are tagged */
2712 if ( error == JVMTI_ERROR_NONE ) {
2713 error = JVMTI_FUNC_PTR(jvmti,GetObjectsWithTags)
2714 (jvmti, 1, &(data.objTag), &(instances->count),
2715 &(instances->objects), NULL);
2716 /* Verify we got the count we expected */
2717 if ( data.instCount != instances->count ) {
2718 error = AGENT_ERROR_INTERNAL;
2719 }
2720 }
2721
2722 /* Dispose of any special jvmti environment */
2723 (void)JVMTI_FUNC_PTR(jvmti,DisposeEnvironment)(jvmti);
2724 return error;
2725 }
2726
2727 /* ********************************************************************* */
2728 /* Instance counts. */
2729
2730 /* Macros to convert a class or instance tag to an index and back again */
2731 #define INDEX2CLASSTAG(i) ((jlong)((i)+1))
2732 #define CLASSTAG2INDEX(t) (((int)(t))-1)
2733 #define JLONG_ABS(x) (((x)<(jlong)0)?-(x):(x))
2734
2735 /* Structure to hold class count heap traversal data (arg user_data) */
2736 typedef struct ClassCountData {
2737 int classCount;
2738 jlong *counts;
2739 jlong negObjTag;
2740 jvmtiError error;
2741 } ClassCountData;
2742
2743 /* Two different cbObjectCounter's, one for FollowReferences, one for
2744 * IterateThroughHeap. Pick a card, any card.
2745 */
2746
2747 /* Callback for object count heap traversal (heap_reference_callback) */
2748 static jint JNICALL
2749 cbObjectCounterFromRef(jvmtiHeapReferenceKind reference_kind,
2750 const jvmtiHeapReferenceInfo* reference_info, jlong class_tag,
2751 jlong referrer_class_tag, jlong size,
2752 jlong* tag_ptr, jlong* referrer_tag_ptr, jint length, void* user_data)
2753 {
2754 ClassCountData *data;
2755 int index;
2756 jlong jindex;
2757 jlong tag;
2758
2759 /* Check data structure */
2760 data = (ClassCountData*)user_data;
2761 if (data == NULL) {
2762 return JVMTI_VISIT_ABORT;
2763 }
2764
2765 /* Classes with no class_tag should have been filtered out. */
2766 if ( class_tag == (jlong)0 ) {
2767 data->error = AGENT_ERROR_INTERNAL;
2768 return JVMTI_VISIT_ABORT;
2769 }
2770
2771 /* Class tag not one we really want (jclass not in supplied list) */
2772 if ( class_tag == data->negObjTag ) {
2773 return JVMTI_VISIT_OBJECTS;
2774 }
2775
2776 /* If object tag is negative, just continue, we counted it */
2777 tag = (*tag_ptr);
2778 if ( tag < (jlong)0 ) {
2779 return JVMTI_VISIT_OBJECTS;
2780 }
2781
2782 /* Tag the object with a negative value just so we don't count it again */
2783 if ( tag == (jlong)0 ) {
2784 /* This object had no tag value, so we give it the negObjTag value */
2785 (*tag_ptr) = data->negObjTag;
2786 } else {
2787 /* If this object had a positive tag value, it must be one of the
2788 * jclass objects we tagged. We need to preserve the value of
2789 * this tag for later objects that might have this as a class
2790 * tag, so we just make the existing tag value negative.
2791 */
2792 (*tag_ptr) = -tag;
2793 }
2794
2795 /* Absolute value of class tag is an index into the counts[] array */
2796 jindex = JLONG_ABS(class_tag);
2797 index = CLASSTAG2INDEX(jindex);
2798 if (index < 0 || index >= data->classCount) {
2799 data->error = AGENT_ERROR_ILLEGAL_ARGUMENT;
2800 return JVMTI_VISIT_ABORT;
2801 }
2802
2803 /* Bump instance count on this class */
2804 data->counts[index]++;
2805 return JVMTI_VISIT_OBJECTS;
2806 }
2807
2808 /* Callback for instance count heap traversal (heap_iteration_callback) */
2809 static jint JNICALL
2810 cbObjectCounter(jlong class_tag, jlong size, jlong* tag_ptr, jint length,
2811 void* user_data)
2812 {
2813 ClassCountData *data;
2814 int index;
2815
2816 /* Check data structure */
2817 data = (ClassCountData*)user_data;
2818 if (data == NULL) {
2819 return JVMTI_VISIT_ABORT;
2820 }
2821
2822 /* Classes with no tag should be filtered out. */
2823 if ( class_tag == (jlong)0 ) {
2824 data->error = AGENT_ERROR_INTERNAL;
2825 return JVMTI_VISIT_ABORT;
2826 }
2827
2828 /* Class tag is actually an index into data arrays */
2829 index = CLASSTAG2INDEX(class_tag);
2830 if (index < 0 || index >= data->classCount) {
2831 data->error = AGENT_ERROR_ILLEGAL_ARGUMENT;
2832 return JVMTI_VISIT_ABORT;
2833 }
2834
2835 /* Bump instance count on this class */
2836 data->counts[index]++;
2837 return JVMTI_VISIT_OBJECTS;
2838 }
2839
2840 /* Get instance counts for a set of classes */
2841 jvmtiError
2842 classInstanceCounts(jint classCount, jclass *classes, jlong *counts)
2843 {
2844 jvmtiHeapCallbacks heap_callbacks;
2845 ClassCountData data;
2846 jvmtiError error;
2847 jvmtiEnv *jvmti;
2848 int i;
2849
2850 /* Check interface assumptions */
2851 if ( classes == NULL || classCount <= 0 || counts == NULL ) {
2852 return AGENT_ERROR_ILLEGAL_ARGUMENT;
2853 }
2854
2855 /* Initialize return information */
2856 for ( i = 0 ; i < classCount ; i++ ) {
2857 counts[i] = (jlong)0;
2858 }
2859
2860 /* Get jvmti environment to use */
2861 jvmti = getSpecialJvmti();
2862 if ( jvmti == NULL ) {
2863 return AGENT_ERROR_INTERNAL;
2864 }
2865
2866 /* Setup class data structure */
2867 data.error = JVMTI_ERROR_NONE;
2868 data.classCount = classCount;
2869 data.counts = counts;
2870
2871 error = JVMTI_ERROR_NONE;
2872 /* Set tags on classes, use index in classes[] as the tag value. */
2873 error = JVMTI_ERROR_NONE;
2874 for ( i = 0 ; i < classCount ; i++ ) {
2875 if (classes[i] != NULL) {
2876 jlong tag;
2877
2878 tag = INDEX2CLASSTAG(i);
2879 error = JVMTI_FUNC_PTR(jvmti,SetTag) (jvmti, classes[i], tag);
2880 if ( error != JVMTI_ERROR_NONE ) {
2881 break;
2882 }
2883 }
2884 }
2885
2886 /* Traverse heap, two ways to do this for instance counts. */
2887 if ( error == JVMTI_ERROR_NONE ) {
2888
2889 /* Clear out callbacks structure */
2890 (void)memset(&heap_callbacks,0,sizeof(heap_callbacks));
2891
2892 /* Check debug flags to see how to do this. */
2893 if ( (gdata->debugflags & USE_ITERATE_THROUGH_HEAP) == 0 ) {
2894
2895 /* Using FollowReferences only gives us live objects, but we
2896 * need to tag the objects to avoid counting them twice since
2897 * the callback is per reference.
2898 * The jclass objects have been tagged with their index in the
2899 * supplied list, and that tag may flip to negative if it
2900 * is also an object of interest.
2901 * All other objects being counted that weren't in the
2902 * supplied classes list will have a negative classCount
2903 * tag value. So all objects counted will have negative tags.
2904 * If the absolute tag value is an index in the supplied
2905 * list, then it's one of the supplied classes.
2906 */
2907 data.negObjTag = -INDEX2CLASSTAG(classCount);
2908
2909 /* Setup callbacks, only using object reference callback */
2910 heap_callbacks.heap_reference_callback = &cbObjectCounterFromRef;
2911
2912 /* Follow references, no initiating object, tagged classes only */
2913 error = JVMTI_FUNC_PTR(jvmti,FollowReferences)
2914 (jvmti, JVMTI_HEAP_FILTER_CLASS_UNTAGGED,
2915 NULL, NULL, &heap_callbacks, &data);
2916
2917 } else {
2918
2919 /* Using IterateThroughHeap means that we will visit each object
2920 * once, so no special tag tricks here. Just simple counting.
2921 * However in this case the object might not be live, so we do
2922 * a GC beforehand to make sure we minimize this.
2923 */
2924
2925 /* FIXUP: Need some kind of trigger here to avoid excessive GC's? */
2926 error = JVMTI_FUNC_PTR(jvmti,ForceGarbageCollection)(jvmti);
2927 if ( error != JVMTI_ERROR_NONE ) {
2928
2929 /* Setup callbacks, just need object callback */
2930 heap_callbacks.heap_iteration_callback = &cbObjectCounter;
2931
2932 /* Iterate through entire heap, tagged classes only */
2933 error = JVMTI_FUNC_PTR(jvmti,IterateThroughHeap)
2934 (jvmti, JVMTI_HEAP_FILTER_CLASS_UNTAGGED,
2935 NULL, &heap_callbacks, &data);
2936
2937 }
2938 }
2939
2940 /* Use data error if needed */
2941 if ( error == JVMTI_ERROR_NONE ) {
2942 error = data.error;
2943 }
2944
2945 }
2946
2947 /* Dispose of any special jvmti environment */
2948 (void)JVMTI_FUNC_PTR(jvmti,DisposeEnvironment)(jvmti);
2949 return error;
2950 }
2951
2952 /* ********************************************************************* */
2953 /* Referrers */
2954
2955 /* Structure to hold object referrer heap traversal data (arg user_data) */
2956 typedef struct ReferrerData {
2957 int refCount;
2958 int maxObjects;
2959 jlong refTag;
2960 jlong objTag;
2961 jboolean selfRef;
2962 jvmtiError error;
2963 } ReferrerData;
2964
2965 /* Callback for referrers object tagging (heap_reference_callback). */
2966 static jint JNICALL
2967 cbObjectTagReferrer(jvmtiHeapReferenceKind reference_kind,
2968 const jvmtiHeapReferenceInfo* reference_info, jlong class_tag,
2969 jlong referrer_class_tag, jlong size,
2970 jlong* tag_ptr, jlong* referrer_tag_ptr, jint length, void* user_data)
2971 {
2972 ReferrerData *data;
2973
2974 /* Check data structure */
2975 data = (ReferrerData*)user_data;
2976 if (data == NULL) {
2977 return JVMTI_VISIT_ABORT;
2978 }
2979
2980 /* If we have tagged enough objects, just abort */
2981 if ( data->maxObjects != 0 && data->refCount >= data->maxObjects ) {
2982 return JVMTI_VISIT_ABORT;
2983 }
2984
2985 /* If not of interest, just continue */
2986 if ( (*tag_ptr) != data->objTag ) {
2987 return JVMTI_VISIT_OBJECTS;
2988 }
2989
2990 /* Self reference that we haven't counted? */
2991 if ( tag_ptr == referrer_tag_ptr ) {
2992 if ( data->selfRef == JNI_FALSE ) {
2993 data->selfRef = JNI_TRUE;
2994 data->refCount++;
2995 }
2996 return JVMTI_VISIT_OBJECTS;
2997 }
2998
2999 /* If the referrer can be tagged, and hasn't been tagged, tag it */
3000 if ( referrer_tag_ptr != NULL ) {
3001 if ( (*referrer_tag_ptr) == (jlong)0 ) {
3002 *referrer_tag_ptr = data->refTag;
3003 data->refCount++;
3004 }
3005 }
3006 return JVMTI_VISIT_OBJECTS;
3007 }
3008
3009 /* Heap traversal to find referrers of an object */
3010 jvmtiError
3011 objectReferrers(jobject obj, ObjectBatch *referrers, int maxObjects)
3012 {
3013 jvmtiHeapCallbacks heap_callbacks;
3014 ReferrerData data;
3015 jvmtiError error;
3016 jvmtiEnv *jvmti;
3017
3018 /* Check interface assumptions */
3019 if (obj == NULL) {
3020 return AGENT_ERROR_INVALID_OBJECT;
3021 }
3022 if (referrers == NULL || maxObjects < 0 ) {
3023 return AGENT_ERROR_ILLEGAL_ARGUMENT;
3024 }
3025
3026 /* Initialize return information */
3027 referrers->count = 0;
3028 referrers->objects = NULL;
3029
3030 /* Get jvmti environment to use */
3031 jvmti = getSpecialJvmti();
3032 if ( jvmti == NULL ) {
3033 return AGENT_ERROR_INTERNAL;
3034 }
3035
3036 /* Fill in the data structure passed around the callbacks */
3037 data.refCount = 0;
3038 data.maxObjects = maxObjects;
3039 data.objTag = (jlong)1;
3040 data.refTag = (jlong)2;
3041 data.selfRef = JNI_FALSE;
3042 data.error = JVMTI_ERROR_NONE;
3043
3044 /* Tag the object of interest */
3045 error = JVMTI_FUNC_PTR(jvmti,SetTag) (jvmti, obj, data.objTag);
3046
3047 /* No need to go any further if we can't tag the object */
3048 if ( error == JVMTI_ERROR_NONE ) {
3049
3050 /* Clear out callbacks structure */
3051 (void)memset(&heap_callbacks,0,sizeof(heap_callbacks));
3052
3053 /* Setup callbacks we want */
3054 heap_callbacks.heap_reference_callback = &cbObjectTagReferrer;
3055
3056 /* Follow references, no initiating object, all classes, 1 tagged objs */
3057 error = JVMTI_FUNC_PTR(jvmti,FollowReferences)
3058 (jvmti, JVMTI_HEAP_FILTER_UNTAGGED,
3059 NULL, NULL, &heap_callbacks, &data);
3060
3061 /* Use data error if needed */
3062 if ( error == JVMTI_ERROR_NONE ) {
3063 error = data.error;
3064 }
3065
3066 }
3067
3068 /* Watch out for self-reference */
3069 if ( error == JVMTI_ERROR_NONE && data.selfRef == JNI_TRUE ) {
3070 /* Tag itself as a referer */
3071 error = JVMTI_FUNC_PTR(jvmti,SetTag) (jvmti, obj, data.refTag);
3072 }
3073
3074 /* Get the jobjects for the tagged referrer objects. */
3075 if ( error == JVMTI_ERROR_NONE ) {
3076 error = JVMTI_FUNC_PTR(jvmti,GetObjectsWithTags)
3077 (jvmti, 1, &(data.refTag), &(referrers->count),
3078 &(referrers->objects), NULL);
3079 /* Verify we got the count we expected */
3080 if ( data.refCount != referrers->count ) {
3081 error = AGENT_ERROR_INTERNAL;
3082 }
3083 }
3084
3085 /* Dispose of any special jvmti environment */
3086 (void)JVMTI_FUNC_PTR(jvmti,DisposeEnvironment)(jvmti);
3087 return error;
3088 }