1 /*
2 * Copyright (c) 2003, 2009, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25
26 # include "incls/_precompiled.incl"
27 # include "incls/_jvmtiEnv.cpp.incl"
28
29
30 #define FIXLATER 0 // REMOVE this when completed.
31
32 // FIXLATER: hook into JvmtiTrace
33 #define TraceJVMTICalls false
34
35 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
36 }
37
38 JvmtiEnv::~JvmtiEnv() {
39 }
40
41 JvmtiEnv*
42 JvmtiEnv::create_a_jvmti(jint version) {
43 return new JvmtiEnv(version);
44 }
45
46 // VM operation class to copy jni function table at safepoint.
47 // More than one java threads or jvmti agents may be reading/
48 // modifying jni function tables. To reduce the risk of bad
49 // interaction b/w these threads it is copied at safepoint.
50 class VM_JNIFunctionTableCopier : public VM_Operation {
51 private:
52 const struct JNINativeInterface_ *_function_table;
53 public:
54 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
55 _function_table = func_tbl;
56 };
57
58 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
59 void doit() {
60 copy_jni_function_table(_function_table);
61 };
62 };
63
64 //
65 // Do not change the "prefix" marker below, everything above it is copied
66 // unchanged into the filled stub, everything below is controlled by the
67 // stub filler (only method bodies are carried forward, and then only for
68 // functionality still in the spec).
69 //
70 // end file prefix
71
72 //
73 // Memory Management functions
74 //
75
76 // mem_ptr - pre-checked for NULL
77 jvmtiError
78 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
79 return allocate(size, mem_ptr);
80 } /* end Allocate */
81
82
83 // mem - NULL is a valid value, must be checked
84 jvmtiError
85 JvmtiEnv::Deallocate(unsigned char* mem) {
86 return deallocate(mem);
87 } /* end Deallocate */
88
89 // Threads_lock NOT held, java_thread not protected by lock
90 // java_thread - pre-checked
91 // data - NULL is a valid value, must be checked
92 jvmtiError
93 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
94 JvmtiThreadState* state = java_thread->jvmti_thread_state();
95 if (state == NULL) {
96 if (data == NULL) {
97 // leaving state unset same as data set to NULL
98 return JVMTI_ERROR_NONE;
99 }
100 // otherwise, create the state
101 state = JvmtiThreadState::state_for(java_thread);
102 if (state == NULL) {
103 return JVMTI_ERROR_THREAD_NOT_ALIVE;
104 }
105 }
106 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
107 return JVMTI_ERROR_NONE;
108 } /* end SetThreadLocalStorage */
109
110
111 // Threads_lock NOT held
112 // thread - NOT pre-checked
113 // data_ptr - pre-checked for NULL
114 jvmtiError
115 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
116 JavaThread* current_thread = JavaThread::current();
117 if (thread == NULL) {
118 JvmtiThreadState* state = current_thread->jvmti_thread_state();
119 *data_ptr = (state == NULL) ? NULL :
120 state->env_thread_state(this)->get_agent_thread_local_storage_data();
121 } else {
122
123 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
124 // the thread to _thread_in_vm. However, when the TLS for a thread
125 // other than the current thread is required we need to transition
126 // from native so as to resolve the jthread.
127
128 ThreadInVMfromNative __tiv(current_thread);
129 __ENTRY(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
130 debug_only(VMNativeEntryWrapper __vew;)
131
132 oop thread_oop = JNIHandles::resolve_external_guard(thread);
133 if (thread_oop == NULL) {
134 return JVMTI_ERROR_INVALID_THREAD;
135 }
136 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
137 return JVMTI_ERROR_INVALID_THREAD;
138 }
139 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
140 if (java_thread == NULL) {
141 return JVMTI_ERROR_THREAD_NOT_ALIVE;
142 }
143 JvmtiThreadState* state = java_thread->jvmti_thread_state();
144 *data_ptr = (state == NULL) ? NULL :
145 state->env_thread_state(this)->get_agent_thread_local_storage_data();
146 }
147 return JVMTI_ERROR_NONE;
148 } /* end GetThreadLocalStorage */
149
150 //
151 // Class functions
152 //
153
154 // class_count_ptr - pre-checked for NULL
155 // classes_ptr - pre-checked for NULL
156 jvmtiError
157 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
158 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
159 } /* end GetLoadedClasses */
160
161
162 // initiating_loader - NULL is a valid value, must be checked
163 // class_count_ptr - pre-checked for NULL
164 // classes_ptr - pre-checked for NULL
165 jvmtiError
166 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
167 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
168 class_count_ptr, classes_ptr);
169 } /* end GetClassLoaderClasses */
170
171 // k_mirror - may be primitive, this must be checked
172 // is_modifiable_class_ptr - pre-checked for NULL
173 jvmtiError
174 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
175 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
176 JNI_TRUE : JNI_FALSE;
177 return JVMTI_ERROR_NONE;
178 } /* end IsModifiableClass */
179
180 // class_count - pre-checked to be greater than or equal to 0
181 // classes - pre-checked for NULL
182 jvmtiError
183 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
184 //TODO: add locking
185
186 int index;
187 JavaThread* current_thread = JavaThread::current();
188 ResourceMark rm(current_thread);
189
190 jvmtiClassDefinition* class_definitions =
191 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
192 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
193
194 for (index = 0; index < class_count; index++) {
195 HandleMark hm(current_thread);
196
197 jclass jcls = classes[index];
198 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
199 if (k_mirror == NULL) {
200 return JVMTI_ERROR_INVALID_CLASS;
201 }
202 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
203 return JVMTI_ERROR_INVALID_CLASS;
204 }
205
206 if (java_lang_Class::is_primitive(k_mirror)) {
207 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
208 }
209
210 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
211 KlassHandle klass(current_thread, k_oop);
212
213 jint status = klass->jvmti_class_status();
214 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
215 return JVMTI_ERROR_INVALID_CLASS;
216 }
217 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
218 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
219 }
220
221 instanceKlassHandle ikh(current_thread, k_oop);
222 if (ikh->get_cached_class_file_bytes() == NULL) {
223 // not cached, we need to reconstitute the class file from VM representation
224 constantPoolHandle constants(current_thread, ikh->constants());
225 ObjectLocker ol(constants, current_thread); // lock constant pool while we query it
226
227 JvmtiClassFileReconstituter reconstituter(ikh);
228 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
229 return reconstituter.get_error();
230 }
231
232 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
233 class_definitions[index].class_bytes = (unsigned char*)
234 reconstituter.class_file_bytes();
235 } else {
236 // it is cached, get it from the cache
237 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
238 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
239 }
240 class_definitions[index].klass = jcls;
241 }
242 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
243 VMThread::execute(&op);
244 return (op.check_error());
245 } /* end RetransformClasses */
246
247
248 // class_count - pre-checked to be greater than or equal to 0
249 // class_definitions - pre-checked for NULL
250 jvmtiError
251 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
252 //TODO: add locking
253 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
254 VMThread::execute(&op);
255 return (op.check_error());
256 } /* end RedefineClasses */
257
258
259 //
260 // Object functions
261 //
262
263 // size_ptr - pre-checked for NULL
264 jvmtiError
265 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
266 oop mirror = JNIHandles::resolve_external_guard(object);
267 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
268
269 if (mirror->klass() == SystemDictionary::Class_klass()) {
270 if (!java_lang_Class::is_primitive(mirror)) {
271 mirror = java_lang_Class::as_klassOop(mirror);
272 assert(mirror != NULL, "class for non-primitive mirror must exist");
273 }
274 }
275
276 *size_ptr = mirror->size() * wordSize;
277 return JVMTI_ERROR_NONE;
278 } /* end GetObjectSize */
279
280 //
281 // Method functions
282 //
283
284 // prefix - NULL is a valid value, must be checked
285 jvmtiError
286 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
287 return prefix == NULL?
288 SetNativeMethodPrefixes(0, NULL) :
289 SetNativeMethodPrefixes(1, (char**)&prefix);
290 } /* end SetNativeMethodPrefix */
291
292
293 // prefix_count - pre-checked to be greater than or equal to 0
294 // prefixes - pre-checked for NULL
295 jvmtiError
296 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
297 // Have to grab JVMTI thread state lock to be sure that some thread
298 // isn't accessing the prefixes at the same time we are setting them.
299 // No locks during VM bring-up.
300 if (Threads::number_of_threads() == 0) {
301 return set_native_method_prefixes(prefix_count, prefixes);
302 } else {
303 MutexLocker mu(JvmtiThreadState_lock);
304 return set_native_method_prefixes(prefix_count, prefixes);
305 }
306 } /* end SetNativeMethodPrefixes */
307
308 //
309 // Event Management functions
310 //
311
312 // callbacks - NULL is a valid value, must be checked
313 // size_of_callbacks - pre-checked to be greater than or equal to 0
314 jvmtiError
315 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
316 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
317 return JVMTI_ERROR_NONE;
318 } /* end SetEventCallbacks */
319
320
321 // event_thread - NULL is a valid value, must be checked
322 jvmtiError
323 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
324 JavaThread* java_thread = NULL;
325 if (event_thread != NULL) {
326 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
327 if (thread_oop == NULL) {
328 return JVMTI_ERROR_INVALID_THREAD;
329 }
330 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
331 return JVMTI_ERROR_INVALID_THREAD;
332 }
333 java_thread = java_lang_Thread::thread(thread_oop);
334 if (java_thread == NULL) {
335 return JVMTI_ERROR_THREAD_NOT_ALIVE;
336 }
337 }
338
339 // event_type must be valid
340 if (!JvmtiEventController::is_valid_event_type(event_type)) {
341 return JVMTI_ERROR_INVALID_EVENT_TYPE;
342 }
343
344 // global events cannot be controlled at thread level.
345 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
346 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
347 }
348
349 bool enabled = (mode == JVMTI_ENABLE);
350
351 // assure that needed capabilities are present
352 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
353 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
354 }
355
356 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
357 record_class_file_load_hook_enabled();
358 }
359 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
360
361 return JVMTI_ERROR_NONE;
362 } /* end SetEventNotificationMode */
363
364 //
365 // Capability functions
366 //
367
368 // capabilities_ptr - pre-checked for NULL
369 jvmtiError
370 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
371 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
372 get_prohibited_capabilities(),
373 capabilities_ptr);
374 return JVMTI_ERROR_NONE;
375 } /* end GetPotentialCapabilities */
376
377
378 // capabilities_ptr - pre-checked for NULL
379 jvmtiError
380 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
381 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
382 get_prohibited_capabilities(),
383 capabilities_ptr,
384 get_capabilities());
385 } /* end AddCapabilities */
386
387
388 // capabilities_ptr - pre-checked for NULL
389 jvmtiError
390 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
391 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
392 return JVMTI_ERROR_NONE;
393 } /* end RelinquishCapabilities */
394
395
396 // capabilities_ptr - pre-checked for NULL
397 jvmtiError
398 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
399 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
400 return JVMTI_ERROR_NONE;
401 } /* end GetCapabilities */
402
403 //
404 // Class Loader Search functions
405 //
406
407 // segment - pre-checked for NULL
408 jvmtiError
409 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
410 jvmtiPhase phase = get_phase();
411 if (phase == JVMTI_PHASE_ONLOAD) {
412 Arguments::append_sysclasspath(segment);
413 return JVMTI_ERROR_NONE;
414 } else if (use_version_1_0_semantics()) {
415 // This JvmtiEnv requested version 1.0 semantics and this function
416 // is only allowed in the ONLOAD phase in version 1.0 so we need to
417 // return an error here.
418 return JVMTI_ERROR_WRONG_PHASE;
419 } else if (phase == JVMTI_PHASE_LIVE) {
420 // The phase is checked by the wrapper that called this function,
421 // but this thread could be racing with the thread that is
422 // terminating the VM so we check one more time.
423
424 // create the zip entry
425 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
426 if (zip_entry == NULL) {
427 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
428 }
429
430 // lock the loader
431 Thread* thread = Thread::current();
432 HandleMark hm;
433 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
434
435 ObjectLocker ol(loader_lock, thread);
436
437 // add the jar file to the bootclasspath
438 if (TraceClassLoading) {
439 tty->print_cr("[Opened %s]", zip_entry->name());
440 }
441 ClassLoader::add_to_list(zip_entry);
442 return JVMTI_ERROR_NONE;
443 } else {
444 return JVMTI_ERROR_WRONG_PHASE;
445 }
446
447 } /* end AddToBootstrapClassLoaderSearch */
448
449
450 // segment - pre-checked for NULL
451 jvmtiError
452 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
453 jvmtiPhase phase = get_phase();
454
455 if (phase == JVMTI_PHASE_ONLOAD) {
456 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
457 if (strcmp("java.class.path", p->key()) == 0) {
458 p->append_value(segment);
459 break;
460 }
461 }
462 return JVMTI_ERROR_NONE;
463 } else if (phase == JVMTI_PHASE_LIVE) {
464 // The phase is checked by the wrapper that called this function,
465 // but this thread could be racing with the thread that is
466 // terminating the VM so we check one more time.
467 HandleMark hm;
468
469 // create the zip entry (which will open the zip file and hence
470 // check that the segment is indeed a zip file).
471 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
472 if (zip_entry == NULL) {
473 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
474 }
475 delete zip_entry; // no longer needed
476
477 // lock the loader
478 Thread* THREAD = Thread::current();
479 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
480
481 ObjectLocker ol(loader, THREAD);
482
483 // need the path as java.lang.String
484 Handle path = java_lang_String::create_from_str(segment, THREAD);
485 if (HAS_PENDING_EXCEPTION) {
486 CLEAR_PENDING_EXCEPTION;
487 return JVMTI_ERROR_INTERNAL;
488 }
489
490 instanceKlassHandle loader_ik(THREAD, loader->klass());
491
492 // Invoke the appendToClassPathForInstrumentation method - if the method
493 // is not found it means the loader doesn't support adding to the class path
494 // in the live phase.
495 {
496 JavaValue res(T_VOID);
497 JavaCalls::call_special(&res,
498 loader,
499 loader_ik,
500 vmSymbolHandles::appendToClassPathForInstrumentation_name(),
501 vmSymbolHandles::appendToClassPathForInstrumentation_signature(),
502 path,
503 THREAD);
504 if (HAS_PENDING_EXCEPTION) {
505 symbolOop ex_name = PENDING_EXCEPTION->klass()->klass_part()->name();
506 CLEAR_PENDING_EXCEPTION;
507
508 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
509 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
510 } else {
511 return JVMTI_ERROR_INTERNAL;
512 }
513 }
514 }
515
516 return JVMTI_ERROR_NONE;
517 } else {
518 return JVMTI_ERROR_WRONG_PHASE;
519 }
520 } /* end AddToSystemClassLoaderSearch */
521
522 //
523 // General functions
524 //
525
526 // phase_ptr - pre-checked for NULL
527 jvmtiError
528 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
529 *phase_ptr = get_phase();
530 return JVMTI_ERROR_NONE;
531 } /* end GetPhase */
532
533
534 jvmtiError
535 JvmtiEnv::DisposeEnvironment() {
536 dispose();
537 return JVMTI_ERROR_NONE;
538 } /* end DisposeEnvironment */
539
540
541 // data - NULL is a valid value, must be checked
542 jvmtiError
543 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
544 set_env_local_storage(data);
545 return JVMTI_ERROR_NONE;
546 } /* end SetEnvironmentLocalStorage */
547
548
549 // data_ptr - pre-checked for NULL
550 jvmtiError
551 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
552 *data_ptr = (void*)get_env_local_storage();
553 return JVMTI_ERROR_NONE;
554 } /* end GetEnvironmentLocalStorage */
555
556 // version_ptr - pre-checked for NULL
557 jvmtiError
558 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
559 *version_ptr = JVMTI_VERSION;
560 return JVMTI_ERROR_NONE;
561 } /* end GetVersionNumber */
562
563
564 // name_ptr - pre-checked for NULL
565 jvmtiError
566 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
567 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
568 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
569 }
570 const char *name = JvmtiUtil::error_name(error);
571 if (name == NULL) {
572 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
573 }
574 size_t len = strlen(name) + 1;
575 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
576 if (err == JVMTI_ERROR_NONE) {
577 memcpy(*name_ptr, name, len);
578 }
579 return err;
580 } /* end GetErrorName */
581
582
583 jvmtiError
584 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
585 switch (flag) {
586 case JVMTI_VERBOSE_OTHER:
587 // ignore
588 break;
589 case JVMTI_VERBOSE_CLASS:
590 TraceClassLoading = value != 0;
591 TraceClassUnloading = value != 0;
592 break;
593 case JVMTI_VERBOSE_GC:
594 PrintGC = value != 0;
595 break;
596 case JVMTI_VERBOSE_JNI:
597 PrintJNIResolving = value != 0;
598 break;
599 default:
600 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
601 };
602 return JVMTI_ERROR_NONE;
603 } /* end SetVerboseFlag */
604
605
606 // format_ptr - pre-checked for NULL
607 jvmtiError
608 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
609 *format_ptr = JVMTI_JLOCATION_JVMBCI;
610 return JVMTI_ERROR_NONE;
611 } /* end GetJLocationFormat */
612
613 #ifndef JVMTI_KERNEL
614
615 //
616 // Thread functions
617 //
618
619 // Threads_lock NOT held
620 // thread - NOT pre-checked
621 // thread_state_ptr - pre-checked for NULL
622 jvmtiError
623 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
624 jint state;
625 oop thread_oop;
626 JavaThread* thr;
627
628 if (thread == NULL) {
629 thread_oop = JavaThread::current()->threadObj();
630 } else {
631 thread_oop = JNIHandles::resolve_external_guard(thread);
632 }
633
634 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
635 return JVMTI_ERROR_INVALID_THREAD;
636 }
637
638 // get most state bits
639 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
640
641 // add more state bits
642 thr = java_lang_Thread::thread(thread_oop);
643 if (thr != NULL) {
644 JavaThreadState jts = thr->thread_state();
645
646 if (thr->is_being_ext_suspended()) {
647 state |= JVMTI_THREAD_STATE_SUSPENDED;
648 }
649 if (jts == _thread_in_native) {
650 state |= JVMTI_THREAD_STATE_IN_NATIVE;
651 }
652 OSThread* osThread = thr->osthread();
653 if (osThread != NULL && osThread->interrupted()) {
654 state |= JVMTI_THREAD_STATE_INTERRUPTED;
655 }
656 }
657
658 *thread_state_ptr = state;
659 return JVMTI_ERROR_NONE;
660 } /* end GetThreadState */
661
662
663 // thread_ptr - pre-checked for NULL
664 jvmtiError
665 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
666 JavaThread* current_thread = JavaThread::current();
667 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
668 return JVMTI_ERROR_NONE;
669 } /* end GetCurrentThread */
670
671
672 // threads_count_ptr - pre-checked for NULL
673 // threads_ptr - pre-checked for NULL
674 jvmtiError
675 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
676 int nthreads = 0;
677 Handle *thread_objs = NULL;
678 ResourceMark rm;
679 HandleMark hm;
680
681 // enumerate threads (including agent threads)
682 ThreadsListEnumerator tle(Thread::current(), true);
683 nthreads = tle.num_threads();
684 *threads_count_ptr = nthreads;
685
686 if (nthreads == 0) {
687 *threads_ptr = NULL;
688 return JVMTI_ERROR_NONE;
689 }
690
691 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
692 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
693
694 for (int i=0; i < nthreads; i++) {
695 thread_objs[i] = Handle(tle.get_threadObj(i));
696 }
697
698 // have to make global handles outside of Threads_lock
699 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
700 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
701
702 *threads_ptr = jthreads;
703 return JVMTI_ERROR_NONE;
704 } /* end GetAllThreads */
705
706
707 // Threads_lock NOT held, java_thread not protected by lock
708 // java_thread - pre-checked
709 jvmtiError
710 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
711 // don't allow hidden thread suspend request.
712 if (java_thread->is_hidden_from_external_view()) {
713 return (JVMTI_ERROR_NONE);
714 }
715
716 {
717 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
718 if (java_thread->is_external_suspend()) {
719 // don't allow nested external suspend requests.
720 return (JVMTI_ERROR_THREAD_SUSPENDED);
721 }
722 if (java_thread->is_exiting()) { // thread is in the process of exiting
723 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
724 }
725 java_thread->set_external_suspend();
726 }
727
728 if (!JvmtiSuspendControl::suspend(java_thread)) {
729 // the thread was in the process of exiting
730 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
731 }
732 return JVMTI_ERROR_NONE;
733 } /* end SuspendThread */
734
735
736 // request_count - pre-checked to be greater than or equal to 0
737 // request_list - pre-checked for NULL
738 // results - pre-checked for NULL
739 jvmtiError
740 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
741 int needSafepoint = 0; // > 0 if we need a safepoint
742 for (int i = 0; i < request_count; i++) {
743 JavaThread *java_thread = get_JavaThread(request_list[i]);
744 if (java_thread == NULL) {
745 results[i] = JVMTI_ERROR_INVALID_THREAD;
746 continue;
747 }
748 // the thread has not yet run or has exited (not on threads list)
749 if (java_thread->threadObj() == NULL) {
750 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
751 continue;
752 }
753 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
754 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
755 continue;
756 }
757 // don't allow hidden thread suspend request.
758 if (java_thread->is_hidden_from_external_view()) {
759 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
760 continue;
761 }
762
763 {
764 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
765 if (java_thread->is_external_suspend()) {
766 // don't allow nested external suspend requests.
767 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
768 continue;
769 }
770 if (java_thread->is_exiting()) { // thread is in the process of exiting
771 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
772 continue;
773 }
774 java_thread->set_external_suspend();
775 }
776 if (java_thread->thread_state() == _thread_in_native) {
777 // We need to try and suspend native threads here. Threads in
778 // other states will self-suspend on their next transition.
779 if (!JvmtiSuspendControl::suspend(java_thread)) {
780 // The thread was in the process of exiting. Force another
781 // safepoint to make sure that this thread transitions.
782 needSafepoint++;
783 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
784 continue;
785 }
786 } else {
787 needSafepoint++;
788 }
789 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
790 }
791 if (needSafepoint > 0) {
792 VM_ForceSafepoint vfs;
793 VMThread::execute(&vfs);
794 }
795 // per-thread suspend results returned via results parameter
796 return JVMTI_ERROR_NONE;
797 } /* end SuspendThreadList */
798
799
800 // Threads_lock NOT held, java_thread not protected by lock
801 // java_thread - pre-checked
802 jvmtiError
803 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
804 // don't allow hidden thread resume request.
805 if (java_thread->is_hidden_from_external_view()) {
806 return JVMTI_ERROR_NONE;
807 }
808
809 if (!java_thread->is_being_ext_suspended()) {
810 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
811 }
812
813 if (!JvmtiSuspendControl::resume(java_thread)) {
814 return JVMTI_ERROR_INTERNAL;
815 }
816 return JVMTI_ERROR_NONE;
817 } /* end ResumeThread */
818
819
820 // request_count - pre-checked to be greater than or equal to 0
821 // request_list - pre-checked for NULL
822 // results - pre-checked for NULL
823 jvmtiError
824 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
825 for (int i = 0; i < request_count; i++) {
826 JavaThread *java_thread = get_JavaThread(request_list[i]);
827 if (java_thread == NULL) {
828 results[i] = JVMTI_ERROR_INVALID_THREAD;
829 continue;
830 }
831 // don't allow hidden thread resume request.
832 if (java_thread->is_hidden_from_external_view()) {
833 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
834 continue;
835 }
836 if (!java_thread->is_being_ext_suspended()) {
837 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
838 continue;
839 }
840
841 if (!JvmtiSuspendControl::resume(java_thread)) {
842 results[i] = JVMTI_ERROR_INTERNAL;
843 continue;
844 }
845
846 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
847 }
848 // per-thread resume results returned via results parameter
849 return JVMTI_ERROR_NONE;
850 } /* end ResumeThreadList */
851
852
853 // Threads_lock NOT held, java_thread not protected by lock
854 // java_thread - pre-checked
855 jvmtiError
856 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
857 oop e = JNIHandles::resolve_external_guard(exception);
858 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
859
860 JavaThread::send_async_exception(java_thread->threadObj(), e);
861
862 return JVMTI_ERROR_NONE;
863
864 } /* end StopThread */
865
866
867 // Threads_lock NOT held
868 // thread - NOT pre-checked
869 jvmtiError
870 JvmtiEnv::InterruptThread(jthread thread) {
871 oop thread_oop = JNIHandles::resolve_external_guard(thread);
872 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
873 return JVMTI_ERROR_INVALID_THREAD;
874
875 JavaThread* current_thread = JavaThread::current();
876
877 // Todo: this is a duplicate of JVM_Interrupt; share code in future
878 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
879 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
880 // We need to re-resolve the java_thread, since a GC might have happened during the
881 // acquire of the lock
882
883 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
884 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
885
886 Thread::interrupt(java_thread);
887
888 return JVMTI_ERROR_NONE;
889 } /* end InterruptThread */
890
891
892 // Threads_lock NOT held
893 // thread - NOT pre-checked
894 // info_ptr - pre-checked for NULL
895 jvmtiError
896 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
897 ResourceMark rm;
898 HandleMark hm;
899
900 JavaThread* current_thread = JavaThread::current();
901
902 // if thread is NULL the current thread is used
903 oop thread_oop;
904 if (thread == NULL) {
905 thread_oop = current_thread->threadObj();
906 } else {
907 thread_oop = JNIHandles::resolve_external_guard(thread);
908 }
909 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
910 return JVMTI_ERROR_INVALID_THREAD;
911
912 Handle thread_obj(current_thread, thread_oop);
913 typeArrayHandle name;
914 ThreadPriority priority;
915 Handle thread_group;
916 Handle context_class_loader;
917 bool is_daemon;
918
919 { MutexLocker mu(Threads_lock);
920
921 name = typeArrayHandle(current_thread, java_lang_Thread::name(thread_obj()));
922 priority = java_lang_Thread::priority(thread_obj());
923 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
924 is_daemon = java_lang_Thread::is_daemon(thread_obj());
925
926 oop loader = java_lang_Thread::context_class_loader(thread_obj());
927 context_class_loader = Handle(current_thread, loader);
928 }
929 { const char *n;
930
931 if (name() != NULL) {
932 n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
933 } else {
934 n = UNICODE::as_utf8(NULL, 0);
935 }
936
937 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
938 if (info_ptr->name == NULL)
939 return JVMTI_ERROR_OUT_OF_MEMORY;
940
941 strcpy(info_ptr->name, n);
942 }
943 info_ptr->is_daemon = is_daemon;
944 info_ptr->priority = priority;
945
946 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
947 jni_reference(context_class_loader);
948 info_ptr->thread_group = jni_reference(thread_group);
949
950 return JVMTI_ERROR_NONE;
951 } /* end GetThreadInfo */
952
953
954 // Threads_lock NOT held, java_thread not protected by lock
955 // java_thread - pre-checked
956 // owned_monitor_count_ptr - pre-checked for NULL
957 // owned_monitors_ptr - pre-checked for NULL
958 jvmtiError
959 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
960 jvmtiError err = JVMTI_ERROR_NONE;
961 JavaThread* calling_thread = JavaThread::current();
962
963 // growable array of jvmti monitors info on the C-heap
964 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
965 new (ResourceObj::C_HEAP) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
966
967 uint32_t debug_bits = 0;
968 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
969 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
970 } else {
971 // JVMTI get monitors info at safepoint. Do not require target thread to
972 // be suspended.
973 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
974 VMThread::execute(&op);
975 err = op.result();
976 }
977 jint owned_monitor_count = owned_monitors_list->length();
978 if (err == JVMTI_ERROR_NONE) {
979 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
980 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
981 // copy into the returned array
982 for (int i = 0; i < owned_monitor_count; i++) {
983 (*owned_monitors_ptr)[i] =
984 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
985 }
986 *owned_monitor_count_ptr = owned_monitor_count;
987 }
988 }
989 // clean up.
990 for (int i = 0; i < owned_monitor_count; i++) {
991 deallocate((unsigned char*)owned_monitors_list->at(i));
992 }
993 delete owned_monitors_list;
994
995 return err;
996 } /* end GetOwnedMonitorInfo */
997
998
999 // Threads_lock NOT held, java_thread not protected by lock
1000 // java_thread - pre-checked
1001 // monitor_info_count_ptr - pre-checked for NULL
1002 // monitor_info_ptr - pre-checked for NULL
1003 jvmtiError
1004 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1005 jvmtiError err = JVMTI_ERROR_NONE;
1006 JavaThread* calling_thread = JavaThread::current();
1007
1008 // growable array of jvmti monitors info on the C-heap
1009 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1010 new (ResourceObj::C_HEAP) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1011
1012 uint32_t debug_bits = 0;
1013 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1014 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1015 } else {
1016 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1017 // be suspended.
1018 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1019 VMThread::execute(&op);
1020 err = op.result();
1021 }
1022
1023 jint owned_monitor_count = owned_monitors_list->length();
1024 if (err == JVMTI_ERROR_NONE) {
1025 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1026 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1027 // copy to output array.
1028 for (int i = 0; i < owned_monitor_count; i++) {
1029 (*monitor_info_ptr)[i].monitor =
1030 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1031 (*monitor_info_ptr)[i].stack_depth =
1032 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1033 }
1034 }
1035 *monitor_info_count_ptr = owned_monitor_count;
1036 }
1037
1038 // clean up.
1039 for (int i = 0; i < owned_monitor_count; i++) {
1040 deallocate((unsigned char*)owned_monitors_list->at(i));
1041 }
1042 delete owned_monitors_list;
1043
1044 return err;
1045 } /* end GetOwnedMonitorStackDepthInfo */
1046
1047
1048 // Threads_lock NOT held, java_thread not protected by lock
1049 // java_thread - pre-checked
1050 // monitor_ptr - pre-checked for NULL
1051 jvmtiError
1052 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1053 jvmtiError err = JVMTI_ERROR_NONE;
1054 uint32_t debug_bits = 0;
1055 JavaThread* calling_thread = JavaThread::current();
1056 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1057 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1058 } else {
1059 // get contended monitor information at safepoint.
1060 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1061 VMThread::execute(&op);
1062 err = op.result();
1063 }
1064 return err;
1065 } /* end GetCurrentContendedMonitor */
1066
1067
1068 // Threads_lock NOT held
1069 // thread - NOT pre-checked
1070 // proc - pre-checked for NULL
1071 // arg - NULL is a valid value, must be checked
1072 jvmtiError
1073 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1074 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1075 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1076 return JVMTI_ERROR_INVALID_THREAD;
1077 }
1078 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1079 return JVMTI_ERROR_INVALID_PRIORITY;
1080 }
1081
1082 //Thread-self
1083 JavaThread* current_thread = JavaThread::current();
1084
1085 Handle thread_hndl(current_thread, thread_oop);
1086 {
1087 MutexLocker mu(Threads_lock); // grab Threads_lock
1088
1089 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1090
1091 // At this point it may be possible that no osthread was created for the
1092 // JavaThread due to lack of memory.
1093 if (new_thread == NULL || new_thread->osthread() == NULL) {
1094 if (new_thread) delete new_thread;
1095 return JVMTI_ERROR_OUT_OF_MEMORY;
1096 }
1097
1098 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1099 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1100 java_lang_Thread::set_daemon(thread_hndl());
1101
1102 new_thread->set_threadObj(thread_hndl());
1103 Threads::add(new_thread);
1104 Thread::start(new_thread);
1105 } // unlock Threads_lock
1106
1107 return JVMTI_ERROR_NONE;
1108 } /* end RunAgentThread */
1109
1110 //
1111 // Thread Group functions
1112 //
1113
1114 // group_count_ptr - pre-checked for NULL
1115 // groups_ptr - pre-checked for NULL
1116 jvmtiError
1117 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1118 JavaThread* current_thread = JavaThread::current();
1119
1120 // Only one top level thread group now.
1121 *group_count_ptr = 1;
1122
1123 // Allocate memory to store global-refs to the thread groups.
1124 // Assume this area is freed by caller.
1125 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1126
1127 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1128
1129 // Convert oop to Handle, then convert Handle to global-ref.
1130 {
1131 HandleMark hm(current_thread);
1132 Handle system_thread_group(current_thread, Universe::system_thread_group());
1133 *groups_ptr[0] = jni_reference(system_thread_group);
1134 }
1135
1136 return JVMTI_ERROR_NONE;
1137 } /* end GetTopThreadGroups */
1138
1139
1140 // info_ptr - pre-checked for NULL
1141 jvmtiError
1142 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1143 ResourceMark rm;
1144 HandleMark hm;
1145
1146 JavaThread* current_thread = JavaThread::current();
1147
1148 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1149 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1150
1151 typeArrayHandle name;
1152 Handle parent_group;
1153 bool is_daemon;
1154 ThreadPriority max_priority;
1155
1156 { MutexLocker mu(Threads_lock);
1157
1158 name = typeArrayHandle(current_thread,
1159 java_lang_ThreadGroup::name(group_obj()));
1160 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1161 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1162 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1163 }
1164
1165 info_ptr->is_daemon = is_daemon;
1166 info_ptr->max_priority = max_priority;
1167 info_ptr->parent = jni_reference(parent_group);
1168
1169 if (name() != NULL) {
1170 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
1171 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
1172 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1173 strcpy(info_ptr->name, n);
1174 } else {
1175 info_ptr->name = NULL;
1176 }
1177
1178 return JVMTI_ERROR_NONE;
1179 } /* end GetThreadGroupInfo */
1180
1181
1182 // thread_count_ptr - pre-checked for NULL
1183 // threads_ptr - pre-checked for NULL
1184 // group_count_ptr - pre-checked for NULL
1185 // groups_ptr - pre-checked for NULL
1186 jvmtiError
1187 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1188 JavaThread* current_thread = JavaThread::current();
1189 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1190 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1191
1192 Handle *thread_objs = NULL;
1193 Handle *group_objs = NULL;
1194 int nthreads = 0;
1195 int ngroups = 0;
1196 int hidden_threads = 0;
1197
1198 ResourceMark rm;
1199 HandleMark hm;
1200
1201 Handle group_hdl(current_thread, group_obj);
1202
1203 { MutexLocker mu(Threads_lock);
1204
1205 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1206 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1207
1208 if (nthreads > 0) {
1209 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1210 assert(nthreads <= threads->length(), "too many threads");
1211 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1212 for (int i=0, j=0; i<nthreads; i++) {
1213 oop thread_obj = threads->obj_at(i);
1214 assert(thread_obj != NULL, "thread_obj is NULL");
1215 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1216 // Filter out hidden java threads.
1217 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1218 hidden_threads++;
1219 continue;
1220 }
1221 thread_objs[j++] = Handle(current_thread, thread_obj);
1222 }
1223 nthreads -= hidden_threads;
1224 }
1225 if (ngroups > 0) {
1226 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1227 assert(ngroups <= groups->length(), "too many threads");
1228 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1229 for (int i=0; i<ngroups; i++) {
1230 oop group_obj = groups->obj_at(i);
1231 assert(group_obj != NULL, "group_obj != NULL");
1232 group_objs[i] = Handle(current_thread, group_obj);
1233 }
1234 }
1235 }
1236
1237 // have to make global handles outside of Threads_lock
1238 *group_count_ptr = ngroups;
1239 *thread_count_ptr = nthreads;
1240 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1241 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1242 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1243 return JVMTI_ERROR_OUT_OF_MEMORY;
1244 }
1245 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1246 return JVMTI_ERROR_OUT_OF_MEMORY;
1247 }
1248
1249 return JVMTI_ERROR_NONE;
1250 } /* end GetThreadGroupChildren */
1251
1252
1253 //
1254 // Stack Frame functions
1255 //
1256
1257 // Threads_lock NOT held, java_thread not protected by lock
1258 // java_thread - pre-checked
1259 // max_frame_count - pre-checked to be greater than or equal to 0
1260 // frame_buffer - pre-checked for NULL
1261 // count_ptr - pre-checked for NULL
1262 jvmtiError
1263 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1264 jvmtiError err = JVMTI_ERROR_NONE;
1265 uint32_t debug_bits = 0;
1266 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1267 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1268 } else {
1269 // JVMTI get stack trace at safepoint. Do not require target thread to
1270 // be suspended.
1271 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1272 VMThread::execute(&op);
1273 err = op.result();
1274 }
1275
1276 return err;
1277 } /* end GetStackTrace */
1278
1279
1280 // max_frame_count - pre-checked to be greater than or equal to 0
1281 // stack_info_ptr - pre-checked for NULL
1282 // thread_count_ptr - pre-checked for NULL
1283 jvmtiError
1284 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1285 jvmtiError err = JVMTI_ERROR_NONE;
1286 JavaThread* calling_thread = JavaThread::current();
1287
1288 // JVMTI get stack traces at safepoint.
1289 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1290 VMThread::execute(&op);
1291 *thread_count_ptr = op.final_thread_count();
1292 *stack_info_ptr = op.stack_info();
1293 err = op.result();
1294 return err;
1295 } /* end GetAllStackTraces */
1296
1297
1298 // thread_count - pre-checked to be greater than or equal to 0
1299 // thread_list - pre-checked for NULL
1300 // max_frame_count - pre-checked to be greater than or equal to 0
1301 // stack_info_ptr - pre-checked for NULL
1302 jvmtiError
1303 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1304 jvmtiError err = JVMTI_ERROR_NONE;
1305 // JVMTI get stack traces at safepoint.
1306 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1307 VMThread::execute(&op);
1308 err = op.result();
1309 if (err == JVMTI_ERROR_NONE) {
1310 *stack_info_ptr = op.stack_info();
1311 }
1312 return err;
1313 } /* end GetThreadListStackTraces */
1314
1315
1316 // Threads_lock NOT held, java_thread not protected by lock
1317 // java_thread - pre-checked
1318 // count_ptr - pre-checked for NULL
1319 jvmtiError
1320 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1321 jvmtiError err = JVMTI_ERROR_NONE;
1322
1323 // retrieve or create JvmtiThreadState.
1324 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1325 if (state == NULL) {
1326 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1327 }
1328 uint32_t debug_bits = 0;
1329 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1330 err = get_frame_count(state, count_ptr);
1331 } else {
1332 // get java stack frame count at safepoint.
1333 VM_GetFrameCount op(this, state, count_ptr);
1334 VMThread::execute(&op);
1335 err = op.result();
1336 }
1337 return err;
1338 } /* end GetFrameCount */
1339
1340
1341 // Threads_lock NOT held, java_thread not protected by lock
1342 // java_thread - pre-checked
1343 jvmtiError
1344 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1345 JavaThread* current_thread = JavaThread::current();
1346 HandleMark hm(current_thread);
1347 uint32_t debug_bits = 0;
1348
1349 // retrieve or create the state
1350 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1351 if (state == NULL) {
1352 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1353 }
1354
1355 // Check if java_thread is fully suspended
1356 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1357 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1358 }
1359 // Check to see if a PopFrame was already in progress
1360 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1361 // Probably possible for JVMTI clients to trigger this, but the
1362 // JPDA backend shouldn't allow this to happen
1363 return JVMTI_ERROR_INTERNAL;
1364 }
1365
1366 {
1367 // Was workaround bug
1368 // 4812902: popFrame hangs if the method is waiting at a synchronize
1369 // Catch this condition and return an error to avoid hanging.
1370 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1371 OSThread* osThread = java_thread->osthread();
1372 if (osThread->get_state() == MONITOR_WAIT) {
1373 return JVMTI_ERROR_OPAQUE_FRAME;
1374 }
1375 }
1376
1377 {
1378 ResourceMark rm(current_thread);
1379 // Check if there are more than one Java frame in this thread, that the top two frames
1380 // are Java (not native) frames, and that there is no intervening VM frame
1381 int frame_count = 0;
1382 bool is_interpreted[2];
1383 intptr_t *frame_sp[2];
1384 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1385 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1386 methodHandle mh(current_thread, vfs.method());
1387 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1388 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1389 frame_sp[frame_count] = vfs.frame_id();
1390 if (++frame_count > 1) break;
1391 }
1392 if (frame_count < 2) {
1393 // We haven't found two adjacent non-native Java frames on the top.
1394 // There can be two situations here:
1395 // 1. There are no more java frames
1396 // 2. Two top java frames are separated by non-java native frames
1397 if(vframeFor(java_thread, 1) == NULL) {
1398 return JVMTI_ERROR_NO_MORE_FRAMES;
1399 } else {
1400 // Intervening non-java native or VM frames separate java frames.
1401 // Current implementation does not support this. See bug #5031735.
1402 // In theory it is possible to pop frames in such cases.
1403 return JVMTI_ERROR_OPAQUE_FRAME;
1404 }
1405 }
1406
1407 // If any of the top 2 frames is a compiled one, need to deoptimize it
1408 for (int i = 0; i < 2; i++) {
1409 if (!is_interpreted[i]) {
1410 VM_DeoptimizeFrame op(java_thread, frame_sp[i]);
1411 VMThread::execute(&op);
1412 }
1413 }
1414
1415 // Update the thread state to reflect that the top frame is popped
1416 // so that cur_stack_depth is maintained properly and all frameIDs
1417 // are invalidated.
1418 // The current frame will be popped later when the suspended thread
1419 // is resumed and right before returning from VM to Java.
1420 // (see call_VM_base() in assembler_<cpu>.cpp).
1421
1422 // It's fine to update the thread state here because no JVMTI events
1423 // shall be posted for this PopFrame.
1424
1425 state->update_for_pop_top_frame();
1426 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1427 // Set pending step flag for this popframe and it is cleared when next
1428 // step event is posted.
1429 state->set_pending_step_for_popframe();
1430 }
1431
1432 return JVMTI_ERROR_NONE;
1433 } /* end PopFrame */
1434
1435
1436 // Threads_lock NOT held, java_thread not protected by lock
1437 // java_thread - pre-checked
1438 // java_thread - unchecked
1439 // depth - pre-checked as non-negative
1440 // method_ptr - pre-checked for NULL
1441 // location_ptr - pre-checked for NULL
1442 jvmtiError
1443 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1444 jvmtiError err = JVMTI_ERROR_NONE;
1445 uint32_t debug_bits = 0;
1446
1447 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1448 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1449 } else {
1450 // JVMTI get java stack frame location at safepoint.
1451 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1452 VMThread::execute(&op);
1453 err = op.result();
1454 }
1455 return err;
1456 } /* end GetFrameLocation */
1457
1458
1459 // Threads_lock NOT held, java_thread not protected by lock
1460 // java_thread - pre-checked
1461 // java_thread - unchecked
1462 // depth - pre-checked as non-negative
1463 jvmtiError
1464 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1465 ResourceMark rm;
1466 uint32_t debug_bits = 0;
1467
1468 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1469 if (state == NULL) {
1470 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1471 }
1472
1473 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1474 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1475 }
1476
1477 if (TraceJVMTICalls) {
1478 JvmtiSuspendControl::print();
1479 }
1480
1481 vframe *vf = vframeFor(java_thread, depth);
1482 if (vf == NULL) {
1483 return JVMTI_ERROR_NO_MORE_FRAMES;
1484 }
1485
1486 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1487 return JVMTI_ERROR_OPAQUE_FRAME;
1488 }
1489
1490 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1491
1492 int frame_number = state->count_frames() - depth;
1493 state->env_thread_state(this)->set_frame_pop(frame_number);
1494
1495 return JVMTI_ERROR_NONE;
1496 } /* end NotifyFramePop */
1497
1498
1499 //
1500 // Force Early Return functions
1501 //
1502
1503 // Threads_lock NOT held, java_thread not protected by lock
1504 // java_thread - pre-checked
1505 jvmtiError
1506 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1507 jvalue val;
1508 val.l = value;
1509 return force_early_return(java_thread, val, atos);
1510 } /* end ForceEarlyReturnObject */
1511
1512
1513 // Threads_lock NOT held, java_thread not protected by lock
1514 // java_thread - pre-checked
1515 jvmtiError
1516 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1517 jvalue val;
1518 val.i = value;
1519 return force_early_return(java_thread, val, itos);
1520 } /* end ForceEarlyReturnInt */
1521
1522
1523 // Threads_lock NOT held, java_thread not protected by lock
1524 // java_thread - pre-checked
1525 jvmtiError
1526 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1527 jvalue val;
1528 val.j = value;
1529 return force_early_return(java_thread, val, ltos);
1530 } /* end ForceEarlyReturnLong */
1531
1532
1533 // Threads_lock NOT held, java_thread not protected by lock
1534 // java_thread - pre-checked
1535 jvmtiError
1536 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1537 jvalue val;
1538 val.f = value;
1539 return force_early_return(java_thread, val, ftos);
1540 } /* end ForceEarlyReturnFloat */
1541
1542
1543 // Threads_lock NOT held, java_thread not protected by lock
1544 // java_thread - pre-checked
1545 jvmtiError
1546 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1547 jvalue val;
1548 val.d = value;
1549 return force_early_return(java_thread, val, dtos);
1550 } /* end ForceEarlyReturnDouble */
1551
1552
1553 // Threads_lock NOT held, java_thread not protected by lock
1554 // java_thread - pre-checked
1555 jvmtiError
1556 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1557 jvalue val;
1558 val.j = 0L;
1559 return force_early_return(java_thread, val, vtos);
1560 } /* end ForceEarlyReturnVoid */
1561
1562
1563 //
1564 // Heap functions
1565 //
1566
1567 // klass - NULL is a valid value, must be checked
1568 // initial_object - NULL is a valid value, must be checked
1569 // callbacks - pre-checked for NULL
1570 // user_data - NULL is a valid value, must be checked
1571 jvmtiError
1572 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1573 // check klass if provided
1574 klassOop k_oop = NULL;
1575 if (klass != NULL) {
1576 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1577 if (k_mirror == NULL) {
1578 return JVMTI_ERROR_INVALID_CLASS;
1579 }
1580 if (java_lang_Class::is_primitive(k_mirror)) {
1581 return JVMTI_ERROR_NONE;
1582 }
1583 k_oop = java_lang_Class::as_klassOop(k_mirror);
1584 if (k_oop == NULL) {
1585 return JVMTI_ERROR_INVALID_CLASS;
1586 }
1587 }
1588
1589 Thread *thread = Thread::current();
1590 HandleMark hm(thread);
1591 KlassHandle kh (thread, k_oop);
1592
1593 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1594 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1595 return JVMTI_ERROR_NONE;
1596 } /* end FollowReferences */
1597
1598
1599 // klass - NULL is a valid value, must be checked
1600 // callbacks - pre-checked for NULL
1601 // user_data - NULL is a valid value, must be checked
1602 jvmtiError
1603 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1604 // check klass if provided
1605 klassOop k_oop = NULL;
1606 if (klass != NULL) {
1607 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1608 if (k_mirror == NULL) {
1609 return JVMTI_ERROR_INVALID_CLASS;
1610 }
1611 if (java_lang_Class::is_primitive(k_mirror)) {
1612 return JVMTI_ERROR_NONE;
1613 }
1614 k_oop = java_lang_Class::as_klassOop(k_mirror);
1615 if (k_oop == NULL) {
1616 return JVMTI_ERROR_INVALID_CLASS;
1617 }
1618 }
1619
1620 Thread *thread = Thread::current();
1621 HandleMark hm(thread);
1622 KlassHandle kh (thread, k_oop);
1623
1624 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1625 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1626 return JVMTI_ERROR_NONE;
1627 } /* end IterateThroughHeap */
1628
1629
1630 // tag_ptr - pre-checked for NULL
1631 jvmtiError
1632 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1633 oop o = JNIHandles::resolve_external_guard(object);
1634 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1635 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1636 return JVMTI_ERROR_NONE;
1637 } /* end GetTag */
1638
1639
1640 jvmtiError
1641 JvmtiEnv::SetTag(jobject object, jlong tag) {
1642 oop o = JNIHandles::resolve_external_guard(object);
1643 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1644 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1645 return JVMTI_ERROR_NONE;
1646 } /* end SetTag */
1647
1648
1649 // tag_count - pre-checked to be greater than or equal to 0
1650 // tags - pre-checked for NULL
1651 // count_ptr - pre-checked for NULL
1652 // object_result_ptr - NULL is a valid value, must be checked
1653 // tag_result_ptr - NULL is a valid value, must be checked
1654 jvmtiError
1655 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1656 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1657 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1658 } /* end GetObjectsWithTags */
1659
1660
1661 jvmtiError
1662 JvmtiEnv::ForceGarbageCollection() {
1663 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1664 return JVMTI_ERROR_NONE;
1665 } /* end ForceGarbageCollection */
1666
1667
1668 //
1669 // Heap (1.0) functions
1670 //
1671
1672 // object_reference_callback - pre-checked for NULL
1673 // user_data - NULL is a valid value, must be checked
1674 jvmtiError
1675 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1676 oop o = JNIHandles::resolve_external_guard(object);
1677 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1678 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1679 return JVMTI_ERROR_NONE;
1680 } /* end IterateOverObjectsReachableFromObject */
1681
1682
1683 // heap_root_callback - NULL is a valid value, must be checked
1684 // stack_ref_callback - NULL is a valid value, must be checked
1685 // object_ref_callback - NULL is a valid value, must be checked
1686 // user_data - NULL is a valid value, must be checked
1687 jvmtiError
1688 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1689 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1690 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1691 return JVMTI_ERROR_NONE;
1692 } /* end IterateOverReachableObjects */
1693
1694
1695 // heap_object_callback - pre-checked for NULL
1696 // user_data - NULL is a valid value, must be checked
1697 jvmtiError
1698 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1699 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1700 Thread *thread = Thread::current();
1701 HandleMark hm(thread);
1702 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1703 return JVMTI_ERROR_NONE;
1704 } /* end IterateOverHeap */
1705
1706
1707 // k_mirror - may be primitive, this must be checked
1708 // heap_object_callback - pre-checked for NULL
1709 // user_data - NULL is a valid value, must be checked
1710 jvmtiError
1711 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1712 if (java_lang_Class::is_primitive(k_mirror)) {
1713 // DO PRIMITIVE CLASS PROCESSING
1714 return JVMTI_ERROR_NONE;
1715 }
1716 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
1717 if (k_oop == NULL) {
1718 return JVMTI_ERROR_INVALID_CLASS;
1719 }
1720 Thread *thread = Thread::current();
1721 HandleMark hm(thread);
1722 KlassHandle klass (thread, k_oop);
1723 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1724 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1725 return JVMTI_ERROR_NONE;
1726 } /* end IterateOverInstancesOfClass */
1727
1728
1729 //
1730 // Local Variable functions
1731 //
1732
1733 // Threads_lock NOT held, java_thread not protected by lock
1734 // java_thread - pre-checked
1735 // java_thread - unchecked
1736 // depth - pre-checked as non-negative
1737 // value_ptr - pre-checked for NULL
1738 jvmtiError
1739 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1740 JavaThread* current_thread = JavaThread::current();
1741 // rm object is created to clean up the javaVFrame created in
1742 // doit_prologue(), but after doit() is finished with it.
1743 ResourceMark rm(current_thread);
1744
1745 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1746 VMThread::execute(&op);
1747 jvmtiError err = op.result();
1748 if (err != JVMTI_ERROR_NONE) {
1749 return err;
1750 } else {
1751 *value_ptr = op.value().l;
1752 return JVMTI_ERROR_NONE;
1753 }
1754 } /* end GetLocalObject */
1755
1756
1757 // Threads_lock NOT held, java_thread not protected by lock
1758 // java_thread - pre-checked
1759 // java_thread - unchecked
1760 // depth - pre-checked as non-negative
1761 // value_ptr - pre-checked for NULL
1762 jvmtiError
1763 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1764 // rm object is created to clean up the javaVFrame created in
1765 // doit_prologue(), but after doit() is finished with it.
1766 ResourceMark rm;
1767
1768 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1769 VMThread::execute(&op);
1770 *value_ptr = op.value().i;
1771 return op.result();
1772 } /* end GetLocalInt */
1773
1774
1775 // Threads_lock NOT held, java_thread not protected by lock
1776 // java_thread - pre-checked
1777 // java_thread - unchecked
1778 // depth - pre-checked as non-negative
1779 // value_ptr - pre-checked for NULL
1780 jvmtiError
1781 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1782 // rm object is created to clean up the javaVFrame created in
1783 // doit_prologue(), but after doit() is finished with it.
1784 ResourceMark rm;
1785
1786 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1787 VMThread::execute(&op);
1788 *value_ptr = op.value().j;
1789 return op.result();
1790 } /* end GetLocalLong */
1791
1792
1793 // Threads_lock NOT held, java_thread not protected by lock
1794 // java_thread - pre-checked
1795 // java_thread - unchecked
1796 // depth - pre-checked as non-negative
1797 // value_ptr - pre-checked for NULL
1798 jvmtiError
1799 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1800 // rm object is created to clean up the javaVFrame created in
1801 // doit_prologue(), but after doit() is finished with it.
1802 ResourceMark rm;
1803
1804 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1805 VMThread::execute(&op);
1806 *value_ptr = op.value().f;
1807 return op.result();
1808 } /* end GetLocalFloat */
1809
1810
1811 // Threads_lock NOT held, java_thread not protected by lock
1812 // java_thread - pre-checked
1813 // java_thread - unchecked
1814 // depth - pre-checked as non-negative
1815 // value_ptr - pre-checked for NULL
1816 jvmtiError
1817 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1818 // rm object is created to clean up the javaVFrame created in
1819 // doit_prologue(), but after doit() is finished with it.
1820 ResourceMark rm;
1821
1822 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1823 VMThread::execute(&op);
1824 *value_ptr = op.value().d;
1825 return op.result();
1826 } /* end GetLocalDouble */
1827
1828
1829 // Threads_lock NOT held, java_thread not protected by lock
1830 // java_thread - pre-checked
1831 // java_thread - unchecked
1832 // depth - pre-checked as non-negative
1833 jvmtiError
1834 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1835 // rm object is created to clean up the javaVFrame created in
1836 // doit_prologue(), but after doit() is finished with it.
1837 ResourceMark rm;
1838 jvalue val;
1839 val.l = value;
1840 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1841 VMThread::execute(&op);
1842 return op.result();
1843 } /* end SetLocalObject */
1844
1845
1846 // Threads_lock NOT held, java_thread not protected by lock
1847 // java_thread - pre-checked
1848 // java_thread - unchecked
1849 // depth - pre-checked as non-negative
1850 jvmtiError
1851 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1852 // rm object is created to clean up the javaVFrame created in
1853 // doit_prologue(), but after doit() is finished with it.
1854 ResourceMark rm;
1855 jvalue val;
1856 val.i = value;
1857 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1858 VMThread::execute(&op);
1859 return op.result();
1860 } /* end SetLocalInt */
1861
1862
1863 // Threads_lock NOT held, java_thread not protected by lock
1864 // java_thread - pre-checked
1865 // java_thread - unchecked
1866 // depth - pre-checked as non-negative
1867 jvmtiError
1868 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1869 // rm object is created to clean up the javaVFrame created in
1870 // doit_prologue(), but after doit() is finished with it.
1871 ResourceMark rm;
1872 jvalue val;
1873 val.j = value;
1874 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1875 VMThread::execute(&op);
1876 return op.result();
1877 } /* end SetLocalLong */
1878
1879
1880 // Threads_lock NOT held, java_thread not protected by lock
1881 // java_thread - pre-checked
1882 // java_thread - unchecked
1883 // depth - pre-checked as non-negative
1884 jvmtiError
1885 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1886 // rm object is created to clean up the javaVFrame created in
1887 // doit_prologue(), but after doit() is finished with it.
1888 ResourceMark rm;
1889 jvalue val;
1890 val.f = value;
1891 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1892 VMThread::execute(&op);
1893 return op.result();
1894 } /* end SetLocalFloat */
1895
1896
1897 // Threads_lock NOT held, java_thread not protected by lock
1898 // java_thread - pre-checked
1899 // java_thread - unchecked
1900 // depth - pre-checked as non-negative
1901 jvmtiError
1902 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1903 // rm object is created to clean up the javaVFrame created in
1904 // doit_prologue(), but after doit() is finished with it.
1905 ResourceMark rm;
1906 jvalue val;
1907 val.d = value;
1908 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
1909 VMThread::execute(&op);
1910 return op.result();
1911 } /* end SetLocalDouble */
1912
1913
1914 //
1915 // Breakpoint functions
1916 //
1917
1918 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
1919 jvmtiError
1920 JvmtiEnv::SetBreakpoint(methodOop method_oop, jlocation location) {
1921 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
1922 if (location < 0) { // simple invalid location check first
1923 return JVMTI_ERROR_INVALID_LOCATION;
1924 }
1925 // verify that the breakpoint is not past the end of the method
1926 if (location >= (jlocation) method_oop->code_size()) {
1927 return JVMTI_ERROR_INVALID_LOCATION;
1928 }
1929
1930 ResourceMark rm;
1931 JvmtiBreakpoint bp(method_oop, location);
1932 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
1933 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
1934 return JVMTI_ERROR_DUPLICATE;
1935
1936 if (TraceJVMTICalls) {
1937 jvmti_breakpoints.print();
1938 }
1939
1940 return JVMTI_ERROR_NONE;
1941 } /* end SetBreakpoint */
1942
1943
1944 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
1945 jvmtiError
1946 JvmtiEnv::ClearBreakpoint(methodOop method_oop, jlocation location) {
1947 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
1948
1949 if (location < 0) { // simple invalid location check first
1950 return JVMTI_ERROR_INVALID_LOCATION;
1951 }
1952
1953 // verify that the breakpoint is not past the end of the method
1954 if (location >= (jlocation) method_oop->code_size()) {
1955 return JVMTI_ERROR_INVALID_LOCATION;
1956 }
1957
1958 JvmtiBreakpoint bp(method_oop, location);
1959
1960 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
1961 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
1962 return JVMTI_ERROR_NOT_FOUND;
1963
1964 if (TraceJVMTICalls) {
1965 jvmti_breakpoints.print();
1966 }
1967
1968 return JVMTI_ERROR_NONE;
1969 } /* end ClearBreakpoint */
1970
1971
1972 //
1973 // Watched Field functions
1974 //
1975
1976 jvmtiError
1977 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
1978 // make sure we haven't set this watch before
1979 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
1980 fdesc_ptr->set_is_field_access_watched(true);
1981 update_klass_field_access_flag(fdesc_ptr);
1982
1983 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
1984
1985 return JVMTI_ERROR_NONE;
1986 } /* end SetFieldAccessWatch */
1987
1988
1989 jvmtiError
1990 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
1991 // make sure we have a watch to clear
1992 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
1993 fdesc_ptr->set_is_field_access_watched(false);
1994 update_klass_field_access_flag(fdesc_ptr);
1995
1996 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
1997
1998 return JVMTI_ERROR_NONE;
1999 } /* end ClearFieldAccessWatch */
2000
2001
2002 jvmtiError
2003 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2004 // make sure we haven't set this watch before
2005 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2006 fdesc_ptr->set_is_field_modification_watched(true);
2007 update_klass_field_access_flag(fdesc_ptr);
2008
2009 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2010
2011 return JVMTI_ERROR_NONE;
2012 } /* end SetFieldModificationWatch */
2013
2014
2015 jvmtiError
2016 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2017 // make sure we have a watch to clear
2018 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2019 fdesc_ptr->set_is_field_modification_watched(false);
2020 update_klass_field_access_flag(fdesc_ptr);
2021
2022 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2023
2024 return JVMTI_ERROR_NONE;
2025 } /* end ClearFieldModificationWatch */
2026
2027 //
2028 // Class functions
2029 //
2030
2031
2032 // k_mirror - may be primitive, this must be checked
2033 // signature_ptr - NULL is a valid value, must be checked
2034 // generic_ptr - NULL is a valid value, must be checked
2035 jvmtiError
2036 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2037 ResourceMark rm;
2038 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2039 klassOop k = NULL;
2040 if (!isPrimitive) {
2041 k = java_lang_Class::as_klassOop(k_mirror);
2042 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2043 }
2044 if (signature_ptr != NULL) {
2045 char* result = NULL;
2046 if (isPrimitive) {
2047 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2048 result = (char*) jvmtiMalloc(2);
2049 result[0] = tchar;
2050 result[1] = '\0';
2051 } else {
2052 const char* class_sig = Klass::cast(k)->signature_name();
2053 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2054 strcpy(result, class_sig);
2055 }
2056 *signature_ptr = result;
2057 }
2058 if (generic_ptr != NULL) {
2059 *generic_ptr = NULL;
2060 if (!isPrimitive && Klass::cast(k)->oop_is_instance()) {
2061 symbolOop soo = instanceKlass::cast(k)->generic_signature();
2062 if (soo != NULL) {
2063 const char *gen_sig = soo->as_C_string();
2064 if (gen_sig != NULL) {
2065 char* gen_result;
2066 jvmtiError err = allocate(strlen(gen_sig) + 1,
2067 (unsigned char **)&gen_result);
2068 if (err != JVMTI_ERROR_NONE) {
2069 return err;
2070 }
2071 strcpy(gen_result, gen_sig);
2072 *generic_ptr = gen_result;
2073 }
2074 }
2075 }
2076 }
2077 return JVMTI_ERROR_NONE;
2078 } /* end GetClassSignature */
2079
2080
2081 // k_mirror - may be primitive, this must be checked
2082 // status_ptr - pre-checked for NULL
2083 jvmtiError
2084 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2085 jint result = 0;
2086 if (java_lang_Class::is_primitive(k_mirror)) {
2087 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2088 } else {
2089 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2090 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2091 result = Klass::cast(k)->jvmti_class_status();
2092 }
2093 *status_ptr = result;
2094
2095 return JVMTI_ERROR_NONE;
2096 } /* end GetClassStatus */
2097
2098
2099 // k_mirror - may be primitive, this must be checked
2100 // source_name_ptr - pre-checked for NULL
2101 jvmtiError
2102 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2103 if (java_lang_Class::is_primitive(k_mirror)) {
2104 return JVMTI_ERROR_ABSENT_INFORMATION;
2105 }
2106 klassOop k_klass = java_lang_Class::as_klassOop(k_mirror);
2107 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2108
2109 if (!Klass::cast(k_klass)->oop_is_instance()) {
2110 return JVMTI_ERROR_ABSENT_INFORMATION;
2111 }
2112
2113 symbolOop sfnOop = instanceKlass::cast(k_klass)->source_file_name();
2114 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2115 {
2116 JavaThread* current_thread = JavaThread::current();
2117 ResourceMark rm(current_thread);
2118 const char* sfncp = (const char*) sfnOop->as_C_string();
2119 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2120 strcpy(*source_name_ptr, sfncp);
2121 }
2122
2123 return JVMTI_ERROR_NONE;
2124 } /* end GetSourceFileName */
2125
2126
2127 // k_mirror - may be primitive, this must be checked
2128 // modifiers_ptr - pre-checked for NULL
2129 jvmtiError
2130 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2131 JavaThread* current_thread = JavaThread::current();
2132 jint result = 0;
2133 if (!java_lang_Class::is_primitive(k_mirror)) {
2134 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2135 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2136 assert((Klass::cast(k)->oop_is_instance() || Klass::cast(k)->oop_is_array()), "should be an instance or an array klass");
2137 result = Klass::cast(k)->compute_modifier_flags(current_thread);
2138 JavaThread* THREAD = current_thread; // pass to macros
2139 if (HAS_PENDING_EXCEPTION) {
2140 CLEAR_PENDING_EXCEPTION;
2141 return JVMTI_ERROR_INTERNAL;
2142 };
2143
2144 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2145 if(Klass::cast(k)->is_super()) {
2146 result |= JVM_ACC_SUPER;
2147 }
2148 } else {
2149 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2150 }
2151 *modifiers_ptr = result;
2152
2153 return JVMTI_ERROR_NONE;
2154 } /* end GetClassModifiers */
2155
2156
2157 // k_mirror - may be primitive, this must be checked
2158 // method_count_ptr - pre-checked for NULL
2159 // methods_ptr - pre-checked for NULL
2160 jvmtiError
2161 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2162 JavaThread* current_thread = JavaThread::current();
2163 HandleMark hm(current_thread);
2164
2165 if (java_lang_Class::is_primitive(k_mirror)) {
2166 *method_count_ptr = 0;
2167 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2168 return JVMTI_ERROR_NONE;
2169 }
2170 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2171 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2172
2173 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2174 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2175 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2176 }
2177
2178 if (!Klass::cast(k)->oop_is_instance()) {
2179 *method_count_ptr = 0;
2180 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2181 return JVMTI_ERROR_NONE;
2182 }
2183 instanceKlassHandle instanceK_h(current_thread, k);
2184 // Allocate the result and fill it in
2185 int result_length = instanceK_h->methods()->length();
2186 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2187 int index;
2188 if (JvmtiExport::can_maintain_original_method_order()) {
2189 // Use the original method ordering indices stored in the class, so we can emit
2190 // jmethodIDs in the order they appeared in the class file
2191 for (index = 0; index < result_length; index++) {
2192 methodOop m = methodOop(instanceK_h->methods()->obj_at(index));
2193 int original_index = instanceK_h->method_ordering()->int_at(index);
2194 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2195 jmethodID id = m->jmethod_id();
2196 result_list[original_index] = id;
2197 }
2198 } else {
2199 // otherwise just copy in any order
2200 for (index = 0; index < result_length; index++) {
2201 methodOop m = methodOop(instanceK_h->methods()->obj_at(index));
2202 jmethodID id = m->jmethod_id();
2203 result_list[index] = id;
2204 }
2205 }
2206 // Fill in return value.
2207 *method_count_ptr = result_length;
2208 *methods_ptr = result_list;
2209
2210 return JVMTI_ERROR_NONE;
2211 } /* end GetClassMethods */
2212
2213
2214 // k_mirror - may be primitive, this must be checked
2215 // field_count_ptr - pre-checked for NULL
2216 // fields_ptr - pre-checked for NULL
2217 jvmtiError
2218 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2219 if (java_lang_Class::is_primitive(k_mirror)) {
2220 *field_count_ptr = 0;
2221 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2222 return JVMTI_ERROR_NONE;
2223 }
2224 JavaThread* current_thread = JavaThread::current();
2225 HandleMark hm(current_thread);
2226 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2227 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2228
2229 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2230 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2231 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2232 }
2233
2234 if (!Klass::cast(k)->oop_is_instance()) {
2235 *field_count_ptr = 0;
2236 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2237 return JVMTI_ERROR_NONE;
2238 }
2239
2240
2241 instanceKlassHandle instanceK_h(current_thread, k);
2242
2243 int result_count = 0;
2244 // First, count the fields.
2245 FilteredFieldStream flds(instanceK_h, true, true);
2246 result_count = flds.field_count();
2247
2248 // Allocate the result and fill it in
2249 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2250 // The JVMTI spec requires fields in the order they occur in the class file,
2251 // this is the reverse order of what FieldStream hands out.
2252 int id_index = (result_count - 1);
2253
2254 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2255 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2256 instanceK_h, src_st.offset(),
2257 src_st.access_flags().is_static());
2258 }
2259 assert(id_index == -1, "just checking");
2260 // Fill in the results
2261 *field_count_ptr = result_count;
2262 *fields_ptr = result_list;
2263
2264 return JVMTI_ERROR_NONE;
2265 } /* end GetClassFields */
2266
2267
2268 // k_mirror - may be primitive, this must be checked
2269 // interface_count_ptr - pre-checked for NULL
2270 // interfaces_ptr - pre-checked for NULL
2271 jvmtiError
2272 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2273 {
2274 if (java_lang_Class::is_primitive(k_mirror)) {
2275 *interface_count_ptr = 0;
2276 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2277 return JVMTI_ERROR_NONE;
2278 }
2279 JavaThread* current_thread = JavaThread::current();
2280 HandleMark hm(current_thread);
2281 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2282 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2283
2284 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2285 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2286 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2287
2288 if (!Klass::cast(k)->oop_is_instance()) {
2289 *interface_count_ptr = 0;
2290 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2291 return JVMTI_ERROR_NONE;
2292 }
2293
2294 objArrayHandle interface_list(current_thread, instanceKlass::cast(k)->local_interfaces());
2295 const int result_length = (interface_list.is_null() ? 0 : interface_list->length());
2296 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2297 for (int i_index = 0; i_index < result_length; i_index += 1) {
2298 oop oop_at = interface_list->obj_at(i_index);
2299 assert(oop_at->is_klass(), "interfaces must be klassOops");
2300 klassOop klassOop_at = klassOop(oop_at); // ???: is there a better way?
2301 assert(Klass::cast(klassOop_at)->is_interface(), "interfaces must be interfaces");
2302 oop mirror_at = Klass::cast(klassOop_at)->java_mirror();
2303 Handle handle_at = Handle(current_thread, mirror_at);
2304 result_list[i_index] = (jclass) jni_reference(handle_at);
2305 }
2306 *interface_count_ptr = result_length;
2307 *interfaces_ptr = result_list;
2308 }
2309
2310 return JVMTI_ERROR_NONE;
2311 } /* end GetImplementedInterfaces */
2312
2313
2314 // k_mirror - may be primitive, this must be checked
2315 // minor_version_ptr - pre-checked for NULL
2316 // major_version_ptr - pre-checked for NULL
2317 jvmtiError
2318 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2319 if (java_lang_Class::is_primitive(k_mirror)) {
2320 return JVMTI_ERROR_ABSENT_INFORMATION;
2321 }
2322 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
2323 Thread *thread = Thread::current();
2324 HandleMark hm(thread);
2325 KlassHandle klass(thread, k_oop);
2326
2327 jint status = klass->jvmti_class_status();
2328 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2329 return JVMTI_ERROR_INVALID_CLASS;
2330 }
2331 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2332 return JVMTI_ERROR_ABSENT_INFORMATION;
2333 }
2334
2335 instanceKlassHandle ik(thread, k_oop);
2336 *minor_version_ptr = ik->minor_version();
2337 *major_version_ptr = ik->major_version();
2338
2339 return JVMTI_ERROR_NONE;
2340 } /* end GetClassVersionNumbers */
2341
2342
2343 // k_mirror - may be primitive, this must be checked
2344 // constant_pool_count_ptr - pre-checked for NULL
2345 // constant_pool_byte_count_ptr - pre-checked for NULL
2346 // constant_pool_bytes_ptr - pre-checked for NULL
2347 jvmtiError
2348 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2349 if (java_lang_Class::is_primitive(k_mirror)) {
2350 return JVMTI_ERROR_ABSENT_INFORMATION;
2351 }
2352
2353 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror);
2354 Thread *thread = Thread::current();
2355 HandleMark hm(thread);
2356 ResourceMark rm(thread);
2357 KlassHandle klass(thread, k_oop);
2358
2359 jint status = klass->jvmti_class_status();
2360 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2361 return JVMTI_ERROR_INVALID_CLASS;
2362 }
2363 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2364 return JVMTI_ERROR_ABSENT_INFORMATION;
2365 }
2366
2367 instanceKlassHandle ikh(thread, k_oop);
2368 constantPoolHandle constants(thread, ikh->constants());
2369 ObjectLocker ol(constants, thread); // lock constant pool while we query it
2370
2371 JvmtiConstantPoolReconstituter reconstituter(ikh);
2372 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2373 return reconstituter.get_error();
2374 }
2375
2376 unsigned char *cpool_bytes;
2377 int cpool_size = reconstituter.cpool_size();
2378 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2379 return reconstituter.get_error();
2380 }
2381 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2382 if (res != JVMTI_ERROR_NONE) {
2383 return res;
2384 }
2385 reconstituter.copy_cpool_bytes(cpool_bytes);
2386 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2387 return reconstituter.get_error();
2388 }
2389
2390 *constant_pool_count_ptr = constants->length();
2391 *constant_pool_byte_count_ptr = cpool_size;
2392 *constant_pool_bytes_ptr = cpool_bytes;
2393
2394 return JVMTI_ERROR_NONE;
2395 } /* end GetConstantPool */
2396
2397
2398 // k_mirror - may be primitive, this must be checked
2399 // is_interface_ptr - pre-checked for NULL
2400 jvmtiError
2401 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2402 {
2403 bool result = false;
2404 if (!java_lang_Class::is_primitive(k_mirror)) {
2405 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2406 if (k != NULL && Klass::cast(k)->is_interface()) {
2407 result = true;
2408 }
2409 }
2410 *is_interface_ptr = result;
2411 }
2412
2413 return JVMTI_ERROR_NONE;
2414 } /* end IsInterface */
2415
2416
2417 // k_mirror - may be primitive, this must be checked
2418 // is_array_class_ptr - pre-checked for NULL
2419 jvmtiError
2420 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2421 {
2422 bool result = false;
2423 if (!java_lang_Class::is_primitive(k_mirror)) {
2424 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2425 if (k != NULL && Klass::cast(k)->oop_is_array()) {
2426 result = true;
2427 }
2428 }
2429 *is_array_class_ptr = result;
2430 }
2431
2432 return JVMTI_ERROR_NONE;
2433 } /* end IsArrayClass */
2434
2435
2436 // k_mirror - may be primitive, this must be checked
2437 // classloader_ptr - pre-checked for NULL
2438 jvmtiError
2439 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2440 {
2441 if (java_lang_Class::is_primitive(k_mirror)) {
2442 *classloader_ptr = (jclass) jni_reference(Handle());
2443 return JVMTI_ERROR_NONE;
2444 }
2445 JavaThread* current_thread = JavaThread::current();
2446 HandleMark hm(current_thread);
2447 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2448 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2449
2450 oop result_oop = Klass::cast(k)->class_loader();
2451 if (result_oop == NULL) {
2452 *classloader_ptr = (jclass) jni_reference(Handle());
2453 return JVMTI_ERROR_NONE;
2454 }
2455 Handle result_handle = Handle(current_thread, result_oop);
2456 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2457 *classloader_ptr = result_jnihandle;
2458 }
2459 return JVMTI_ERROR_NONE;
2460 } /* end GetClassLoader */
2461
2462
2463 // k_mirror - may be primitive, this must be checked
2464 // source_debug_extension_ptr - pre-checked for NULL
2465 jvmtiError
2466 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2467 {
2468 if (java_lang_Class::is_primitive(k_mirror)) {
2469 return JVMTI_ERROR_ABSENT_INFORMATION;
2470 }
2471 klassOop k = java_lang_Class::as_klassOop(k_mirror);
2472 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2473 if (!Klass::cast(k)->oop_is_instance()) {
2474 return JVMTI_ERROR_ABSENT_INFORMATION;
2475 }
2476 symbolOop sdeOop = instanceKlass::cast(k)->source_debug_extension();
2477 NULL_CHECK(sdeOop, JVMTI_ERROR_ABSENT_INFORMATION);
2478
2479 {
2480 JavaThread* current_thread = JavaThread::current();
2481 ResourceMark rm(current_thread);
2482 const char* sdecp = (const char*) sdeOop->as_C_string();
2483 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sdecp)+1);
2484 strcpy(*source_debug_extension_ptr, sdecp);
2485 }
2486 }
2487
2488 return JVMTI_ERROR_NONE;
2489 } /* end GetSourceDebugExtension */
2490
2491 //
2492 // Object functions
2493 //
2494
2495 // hash_code_ptr - pre-checked for NULL
2496 jvmtiError
2497 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2498 oop mirror = JNIHandles::resolve_external_guard(object);
2499 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2500 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2501
2502 {
2503 jint result = (jint) mirror->identity_hash();
2504 *hash_code_ptr = result;
2505 }
2506 return JVMTI_ERROR_NONE;
2507 } /* end GetObjectHashCode */
2508
2509
2510 // info_ptr - pre-checked for NULL
2511 jvmtiError
2512 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2513 JavaThread* calling_thread = JavaThread::current();
2514 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2515 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2516 // Some of the critical threads were not suspended. go to a safepoint and try again
2517 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2518 VMThread::execute(&op);
2519 err = op.result();
2520 }
2521 return err;
2522 } /* end GetObjectMonitorUsage */
2523
2524
2525 //
2526 // Field functions
2527 //
2528
2529 // name_ptr - NULL is a valid value, must be checked
2530 // signature_ptr - NULL is a valid value, must be checked
2531 // generic_ptr - NULL is a valid value, must be checked
2532 jvmtiError
2533 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2534 JavaThread* current_thread = JavaThread::current();
2535 ResourceMark rm(current_thread);
2536 if (name_ptr == NULL) {
2537 // just don't return the name
2538 } else {
2539 const char* fieldName = fdesc_ptr->name()->as_C_string();
2540 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2541 if (*name_ptr == NULL)
2542 return JVMTI_ERROR_OUT_OF_MEMORY;
2543 strcpy(*name_ptr, fieldName);
2544 }
2545 if (signature_ptr== NULL) {
2546 // just don't return the signature
2547 } else {
2548 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2549 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2550 if (*signature_ptr == NULL)
2551 return JVMTI_ERROR_OUT_OF_MEMORY;
2552 strcpy(*signature_ptr, fieldSignature);
2553 }
2554 if (generic_ptr != NULL) {
2555 *generic_ptr = NULL;
2556 symbolOop soop = fdesc_ptr->generic_signature();
2557 if (soop != NULL) {
2558 const char* gen_sig = soop->as_C_string();
2559 if (gen_sig != NULL) {
2560 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2561 if (err != JVMTI_ERROR_NONE) {
2562 return err;
2563 }
2564 strcpy(*generic_ptr, gen_sig);
2565 }
2566 }
2567 }
2568 return JVMTI_ERROR_NONE;
2569 } /* end GetFieldName */
2570
2571
2572 // declaring_class_ptr - pre-checked for NULL
2573 jvmtiError
2574 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2575
2576 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2577 return JVMTI_ERROR_NONE;
2578 } /* end GetFieldDeclaringClass */
2579
2580
2581 // modifiers_ptr - pre-checked for NULL
2582 jvmtiError
2583 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2584
2585 AccessFlags resultFlags = fdesc_ptr->access_flags();
2586 jint result = resultFlags.as_int();
2587 *modifiers_ptr = result;
2588
2589 return JVMTI_ERROR_NONE;
2590 } /* end GetFieldModifiers */
2591
2592
2593 // is_synthetic_ptr - pre-checked for NULL
2594 jvmtiError
2595 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2596 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2597 return JVMTI_ERROR_NONE;
2598 } /* end IsFieldSynthetic */
2599
2600
2601 //
2602 // Method functions
2603 //
2604
2605 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2606 // name_ptr - NULL is a valid value, must be checked
2607 // signature_ptr - NULL is a valid value, must be checked
2608 // generic_ptr - NULL is a valid value, must be checked
2609 jvmtiError
2610 JvmtiEnv::GetMethodName(methodOop method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2611 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2612 JavaThread* current_thread = JavaThread::current();
2613
2614 ResourceMark rm(current_thread); // get the utf8 name and signature
2615 if (name_ptr == NULL) {
2616 // just don't return the name
2617 } else {
2618 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2619 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2620 strcpy(*name_ptr, utf8_name);
2621 }
2622 if (signature_ptr == NULL) {
2623 // just don't return the signature
2624 } else {
2625 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2626 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2627 strcpy(*signature_ptr, utf8_signature);
2628 }
2629
2630 if (generic_ptr != NULL) {
2631 *generic_ptr = NULL;
2632 symbolOop soop = method_oop->generic_signature();
2633 if (soop != NULL) {
2634 const char* gen_sig = soop->as_C_string();
2635 if (gen_sig != NULL) {
2636 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2637 if (err != JVMTI_ERROR_NONE) {
2638 return err;
2639 }
2640 strcpy(*generic_ptr, gen_sig);
2641 }
2642 }
2643 }
2644 return JVMTI_ERROR_NONE;
2645 } /* end GetMethodName */
2646
2647
2648 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2649 // declaring_class_ptr - pre-checked for NULL
2650 jvmtiError
2651 JvmtiEnv::GetMethodDeclaringClass(methodOop method_oop, jclass* declaring_class_ptr) {
2652 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2653 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2654 return JVMTI_ERROR_NONE;
2655 } /* end GetMethodDeclaringClass */
2656
2657
2658 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2659 // modifiers_ptr - pre-checked for NULL
2660 jvmtiError
2661 JvmtiEnv::GetMethodModifiers(methodOop method_oop, jint* modifiers_ptr) {
2662 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2663 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2664 return JVMTI_ERROR_NONE;
2665 } /* end GetMethodModifiers */
2666
2667
2668 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2669 // max_ptr - pre-checked for NULL
2670 jvmtiError
2671 JvmtiEnv::GetMaxLocals(methodOop method_oop, jint* max_ptr) {
2672 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2673 // get max stack
2674 (*max_ptr) = method_oop->max_locals();
2675 return JVMTI_ERROR_NONE;
2676 } /* end GetMaxLocals */
2677
2678
2679 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2680 // size_ptr - pre-checked for NULL
2681 jvmtiError
2682 JvmtiEnv::GetArgumentsSize(methodOop method_oop, jint* size_ptr) {
2683 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2684 // get size of arguments
2685
2686 (*size_ptr) = method_oop->size_of_parameters();
2687 return JVMTI_ERROR_NONE;
2688 } /* end GetArgumentsSize */
2689
2690
2691 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2692 // entry_count_ptr - pre-checked for NULL
2693 // table_ptr - pre-checked for NULL
2694 jvmtiError
2695 JvmtiEnv::GetLineNumberTable(methodOop method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2696 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2697 if (!method_oop->has_linenumber_table()) {
2698 return (JVMTI_ERROR_ABSENT_INFORMATION);
2699 }
2700
2701 // The line number table is compressed so we don't know how big it is until decompressed.
2702 // Decompression is really fast so we just do it twice.
2703
2704 // Compute size of table
2705 jint num_entries = 0;
2706 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2707 while (stream.read_pair()) {
2708 num_entries++;
2709 }
2710 jvmtiLineNumberEntry *jvmti_table =
2711 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2712
2713 // Fill jvmti table
2714 if (num_entries > 0) {
2715 int index = 0;
2716 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2717 while (stream.read_pair()) {
2718 jvmti_table[index].start_location = (jlocation) stream.bci();
2719 jvmti_table[index].line_number = (jint) stream.line();
2720 index++;
2721 }
2722 assert(index == num_entries, "sanity check");
2723 }
2724
2725 // Set up results
2726 (*entry_count_ptr) = num_entries;
2727 (*table_ptr) = jvmti_table;
2728
2729 return JVMTI_ERROR_NONE;
2730 } /* end GetLineNumberTable */
2731
2732
2733 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2734 // start_location_ptr - pre-checked for NULL
2735 // end_location_ptr - pre-checked for NULL
2736 jvmtiError
2737 JvmtiEnv::GetMethodLocation(methodOop method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2738
2739 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2740 // get start and end location
2741 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2742 if (method_oop->code_size() == 0) {
2743 // there is no code so there is no start location
2744 (*start_location_ptr) = (jlocation)(-1);
2745 } else {
2746 (*start_location_ptr) = (jlocation)(0);
2747 }
2748
2749 return JVMTI_ERROR_NONE;
2750 } /* end GetMethodLocation */
2751
2752
2753 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2754 // entry_count_ptr - pre-checked for NULL
2755 // table_ptr - pre-checked for NULL
2756 jvmtiError
2757 JvmtiEnv::GetLocalVariableTable(methodOop method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2758
2759 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2760 JavaThread* current_thread = JavaThread::current();
2761
2762 // does the klass have any local variable information?
2763 instanceKlass* ik = instanceKlass::cast(method_oop->method_holder());
2764 if (!ik->access_flags().has_localvariable_table()) {
2765 return (JVMTI_ERROR_ABSENT_INFORMATION);
2766 }
2767
2768 constantPoolOop constants = method_oop->constants();
2769 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2770
2771 // in the vm localvariable table representation, 6 consecutive elements in the table
2772 // represent a 6-tuple of shorts
2773 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2774 jint num_entries = method_oop->localvariable_table_length();
2775 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2776 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2777
2778 if (num_entries > 0) {
2779 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2780 for (int i = 0; i < num_entries; i++) {
2781 // get the 5 tuple information from the vm table
2782 jlocation start_location = (jlocation) table[i].start_bci;
2783 jint length = (jint) table[i].length;
2784 int name_index = (int) table[i].name_cp_index;
2785 int signature_index = (int) table[i].descriptor_cp_index;
2786 int generic_signature_index = (int) table[i].signature_cp_index;
2787 jint slot = (jint) table[i].slot;
2788
2789 // get utf8 name and signature
2790 char *name_buf = NULL;
2791 char *sig_buf = NULL;
2792 char *gen_sig_buf = NULL;
2793 {
2794 ResourceMark rm(current_thread);
2795
2796 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2797 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2798 strcpy(name_buf, utf8_name);
2799
2800 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2801 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2802 strcpy(sig_buf, utf8_signature);
2803
2804 if (generic_signature_index > 0) {
2805 const char *utf8_gen_sign = (const char *)
2806 constants->symbol_at(generic_signature_index)->as_utf8();
2807 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2808 strcpy(gen_sig_buf, utf8_gen_sign);
2809 }
2810 }
2811
2812 // fill in the jvmti local variable table
2813 jvmti_table[i].start_location = start_location;
2814 jvmti_table[i].length = length;
2815 jvmti_table[i].name = name_buf;
2816 jvmti_table[i].signature = sig_buf;
2817 jvmti_table[i].generic_signature = gen_sig_buf;
2818 jvmti_table[i].slot = slot;
2819 }
2820 }
2821
2822 // set results
2823 (*entry_count_ptr) = num_entries;
2824 (*table_ptr) = jvmti_table;
2825
2826 return JVMTI_ERROR_NONE;
2827 } /* end GetLocalVariableTable */
2828
2829
2830 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2831 // bytecode_count_ptr - pre-checked for NULL
2832 // bytecodes_ptr - pre-checked for NULL
2833 jvmtiError
2834 JvmtiEnv::GetBytecodes(methodOop method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2835 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2836
2837 HandleMark hm;
2838 methodHandle method(method_oop);
2839 jint size = (jint)method->code_size();
2840 jvmtiError err = allocate(size, bytecodes_ptr);
2841 if (err != JVMTI_ERROR_NONE) {
2842 return err;
2843 }
2844
2845 (*bytecode_count_ptr) = size;
2846 // get byte codes
2847 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2848
2849 return JVMTI_ERROR_NONE;
2850 } /* end GetBytecodes */
2851
2852
2853 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2854 // is_native_ptr - pre-checked for NULL
2855 jvmtiError
2856 JvmtiEnv::IsMethodNative(methodOop method_oop, jboolean* is_native_ptr) {
2857 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2858 (*is_native_ptr) = method_oop->is_native();
2859 return JVMTI_ERROR_NONE;
2860 } /* end IsMethodNative */
2861
2862
2863 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2864 // is_synthetic_ptr - pre-checked for NULL
2865 jvmtiError
2866 JvmtiEnv::IsMethodSynthetic(methodOop method_oop, jboolean* is_synthetic_ptr) {
2867 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2868 (*is_synthetic_ptr) = method_oop->is_synthetic();
2869 return JVMTI_ERROR_NONE;
2870 } /* end IsMethodSynthetic */
2871
2872
2873 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2874 // is_obsolete_ptr - pre-checked for NULL
2875 jvmtiError
2876 JvmtiEnv::IsMethodObsolete(methodOop method_oop, jboolean* is_obsolete_ptr) {
2877 if (use_version_1_0_semantics() &&
2878 get_capabilities()->can_redefine_classes == 0) {
2879 // This JvmtiEnv requested version 1.0 semantics and this function
2880 // requires the can_redefine_classes capability in version 1.0 so
2881 // we need to return an error here.
2882 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2883 }
2884
2885 if (method_oop == NULL || method_oop->is_obsolete()) {
2886 *is_obsolete_ptr = true;
2887 } else {
2888 *is_obsolete_ptr = false;
2889 }
2890 return JVMTI_ERROR_NONE;
2891 } /* end IsMethodObsolete */
2892
2893 //
2894 // Raw Monitor functions
2895 //
2896
2897 // name - pre-checked for NULL
2898 // monitor_ptr - pre-checked for NULL
2899 jvmtiError
2900 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
2901 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
2902 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
2903
2904 *monitor_ptr = (jrawMonitorID)rmonitor;
2905
2906 return JVMTI_ERROR_NONE;
2907 } /* end CreateRawMonitor */
2908
2909
2910 // rmonitor - pre-checked for validity
2911 jvmtiError
2912 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
2913 if (Threads::number_of_threads() == 0) {
2914 // Remove this monitor from pending raw monitors list
2915 // if it has entered in onload or start phase.
2916 JvmtiPendingMonitors::destroy(rmonitor);
2917 } else {
2918 Thread* thread = Thread::current();
2919 if (rmonitor->is_entered(thread)) {
2920 // The caller owns this monitor which we are about to destroy.
2921 // We exit the underlying synchronization object so that the
2922 // "delete monitor" call below can work without an assertion
2923 // failure on systems that don't like destroying synchronization
2924 // objects that are locked.
2925 int r;
2926 intptr_t recursion = rmonitor->recursions();
2927 for (intptr_t i=0; i <= recursion; i++) {
2928 r = rmonitor->raw_exit(thread);
2929 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
2930 if (r != ObjectMonitor::OM_OK) { // robustness
2931 return JVMTI_ERROR_INTERNAL;
2932 }
2933 }
2934 }
2935 if (rmonitor->owner() != NULL) {
2936 // The caller is trying to destroy a monitor that is locked by
2937 // someone else. While this is not forbidden by the JVMTI
2938 // spec, it will cause an assertion failure on systems that don't
2939 // like destroying synchronization objects that are locked.
2940 // We indicate a problem with the error return (and leak the
2941 // monitor's memory).
2942 return JVMTI_ERROR_NOT_MONITOR_OWNER;
2943 }
2944 }
2945
2946 delete rmonitor;
2947
2948 return JVMTI_ERROR_NONE;
2949 } /* end DestroyRawMonitor */
2950
2951
2952 // rmonitor - pre-checked for validity
2953 jvmtiError
2954 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
2955 if (Threads::number_of_threads() == 0) {
2956 // No JavaThreads exist so ObjectMonitor enter cannot be
2957 // used, add this raw monitor to the pending list.
2958 // The pending monitors will be actually entered when
2959 // the VM is setup.
2960 // See transition_pending_raw_monitors in create_vm()
2961 // in thread.cpp.
2962 JvmtiPendingMonitors::enter(rmonitor);
2963 } else {
2964 int r;
2965 Thread* thread = Thread::current();
2966
2967 if (thread->is_Java_thread()) {
2968 JavaThread* current_thread = (JavaThread*)thread;
2969
2970 #ifdef PROPER_TRANSITIONS
2971 // Not really unknown but ThreadInVMfromNative does more than we want
2972 ThreadInVMfromUnknown __tiv;
2973 {
2974 ThreadBlockInVM __tbivm(current_thread);
2975 r = rmonitor->raw_enter(current_thread);
2976 }
2977 #else
2978 /* Transition to thread_blocked without entering vm state */
2979 /* This is really evil. Normally you can't undo _thread_blocked */
2980 /* transitions like this because it would cause us to miss a */
2981 /* safepoint but since the thread was already in _thread_in_native */
2982 /* the thread is not leaving a safepoint safe state and it will */
2983 /* block when it tries to return from native. We can't safepoint */
2984 /* block in here because we could deadlock the vmthread. Blech. */
2985
2986 JavaThreadState state = current_thread->thread_state();
2987 assert(state == _thread_in_native, "Must be _thread_in_native");
2988 // frame should already be walkable since we are in native
2989 assert(!current_thread->has_last_Java_frame() ||
2990 current_thread->frame_anchor()->walkable(), "Must be walkable");
2991 current_thread->set_thread_state(_thread_blocked);
2992
2993 r = rmonitor->raw_enter(current_thread);
2994 // restore state, still at a safepoint safe state
2995 current_thread->set_thread_state(state);
2996
2997 #endif /* PROPER_TRANSITIONS */
2998 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
2999 } else {
3000 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3001 r = rmonitor->raw_enter(thread);
3002 } else {
3003 ShouldNotReachHere();
3004 }
3005 }
3006
3007 if (r != ObjectMonitor::OM_OK) { // robustness
3008 return JVMTI_ERROR_INTERNAL;
3009 }
3010 }
3011 return JVMTI_ERROR_NONE;
3012 } /* end RawMonitorEnter */
3013
3014
3015 // rmonitor - pre-checked for validity
3016 jvmtiError
3017 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3018 jvmtiError err = JVMTI_ERROR_NONE;
3019
3020 if (Threads::number_of_threads() == 0) {
3021 // No JavaThreads exist so just remove this monitor from the pending list.
3022 // Bool value from exit is false if rmonitor is not in the list.
3023 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3024 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3025 }
3026 } else {
3027 int r;
3028 Thread* thread = Thread::current();
3029
3030 if (thread->is_Java_thread()) {
3031 JavaThread* current_thread = (JavaThread*)thread;
3032 #ifdef PROPER_TRANSITIONS
3033 // Not really unknown but ThreadInVMfromNative does more than we want
3034 ThreadInVMfromUnknown __tiv;
3035 #endif /* PROPER_TRANSITIONS */
3036 r = rmonitor->raw_exit(current_thread);
3037 } else {
3038 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3039 r = rmonitor->raw_exit(thread);
3040 } else {
3041 ShouldNotReachHere();
3042 }
3043 }
3044
3045 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3046 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3047 } else {
3048 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3049 if (r != ObjectMonitor::OM_OK) { // robustness
3050 err = JVMTI_ERROR_INTERNAL;
3051 }
3052 }
3053 }
3054 return err;
3055 } /* end RawMonitorExit */
3056
3057
3058 // rmonitor - pre-checked for validity
3059 jvmtiError
3060 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3061 int r;
3062 Thread* thread = Thread::current();
3063
3064 if (thread->is_Java_thread()) {
3065 JavaThread* current_thread = (JavaThread*)thread;
3066 #ifdef PROPER_TRANSITIONS
3067 // Not really unknown but ThreadInVMfromNative does more than we want
3068 ThreadInVMfromUnknown __tiv;
3069 {
3070 ThreadBlockInVM __tbivm(current_thread);
3071 r = rmonitor->raw_wait(millis, true, current_thread);
3072 }
3073 #else
3074 /* Transition to thread_blocked without entering vm state */
3075 /* This is really evil. Normally you can't undo _thread_blocked */
3076 /* transitions like this because it would cause us to miss a */
3077 /* safepoint but since the thread was already in _thread_in_native */
3078 /* the thread is not leaving a safepoint safe state and it will */
3079 /* block when it tries to return from native. We can't safepoint */
3080 /* block in here because we could deadlock the vmthread. Blech. */
3081
3082 JavaThreadState state = current_thread->thread_state();
3083 assert(state == _thread_in_native, "Must be _thread_in_native");
3084 // frame should already be walkable since we are in native
3085 assert(!current_thread->has_last_Java_frame() ||
3086 current_thread->frame_anchor()->walkable(), "Must be walkable");
3087 current_thread->set_thread_state(_thread_blocked);
3088
3089 r = rmonitor->raw_wait(millis, true, current_thread);
3090 // restore state, still at a safepoint safe state
3091 current_thread->set_thread_state(state);
3092
3093 #endif /* PROPER_TRANSITIONS */
3094 } else {
3095 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3096 r = rmonitor->raw_wait(millis, true, thread);
3097 } else {
3098 ShouldNotReachHere();
3099 }
3100 }
3101
3102 switch (r) {
3103 case ObjectMonitor::OM_INTERRUPTED:
3104 return JVMTI_ERROR_INTERRUPT;
3105 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3106 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3107 }
3108 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3109 if (r != ObjectMonitor::OM_OK) { // robustness
3110 return JVMTI_ERROR_INTERNAL;
3111 }
3112
3113 return JVMTI_ERROR_NONE;
3114 } /* end RawMonitorWait */
3115
3116
3117 // rmonitor - pre-checked for validity
3118 jvmtiError
3119 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3120 int r;
3121 Thread* thread = Thread::current();
3122
3123 if (thread->is_Java_thread()) {
3124 JavaThread* current_thread = (JavaThread*)thread;
3125 // Not really unknown but ThreadInVMfromNative does more than we want
3126 ThreadInVMfromUnknown __tiv;
3127 r = rmonitor->raw_notify(current_thread);
3128 } else {
3129 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3130 r = rmonitor->raw_notify(thread);
3131 } else {
3132 ShouldNotReachHere();
3133 }
3134 }
3135
3136 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3137 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3138 }
3139 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3140 if (r != ObjectMonitor::OM_OK) { // robustness
3141 return JVMTI_ERROR_INTERNAL;
3142 }
3143
3144 return JVMTI_ERROR_NONE;
3145 } /* end RawMonitorNotify */
3146
3147
3148 // rmonitor - pre-checked for validity
3149 jvmtiError
3150 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3151 int r;
3152 Thread* thread = Thread::current();
3153
3154 if (thread->is_Java_thread()) {
3155 JavaThread* current_thread = (JavaThread*)thread;
3156 ThreadInVMfromUnknown __tiv;
3157 r = rmonitor->raw_notifyAll(current_thread);
3158 } else {
3159 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3160 r = rmonitor->raw_notifyAll(thread);
3161 } else {
3162 ShouldNotReachHere();
3163 }
3164 }
3165
3166 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3167 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3168 }
3169 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3170 if (r != ObjectMonitor::OM_OK) { // robustness
3171 return JVMTI_ERROR_INTERNAL;
3172 }
3173
3174 return JVMTI_ERROR_NONE;
3175 } /* end RawMonitorNotifyAll */
3176
3177
3178 //
3179 // JNI Function Interception functions
3180 //
3181
3182
3183 // function_table - pre-checked for NULL
3184 jvmtiError
3185 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3186 // Copy jni function table at safepoint.
3187 VM_JNIFunctionTableCopier copier(function_table);
3188 VMThread::execute(&copier);
3189
3190 return JVMTI_ERROR_NONE;
3191 } /* end SetJNIFunctionTable */
3192
3193
3194 // function_table - pre-checked for NULL
3195 jvmtiError
3196 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3197 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3198 if (*function_table == NULL)
3199 return JVMTI_ERROR_OUT_OF_MEMORY;
3200 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3201 return JVMTI_ERROR_NONE;
3202 } /* end GetJNIFunctionTable */
3203
3204
3205 //
3206 // Event Management functions
3207 //
3208
3209 jvmtiError
3210 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3211 // can only generate two event types
3212 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3213 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3214 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3215 }
3216
3217 // for compiled_method_load events we must check that the environment
3218 // has the can_generate_compiled_method_load_events capability.
3219 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3220 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3221 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3222 }
3223 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3224 } else {
3225 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3226 }
3227
3228 } /* end GenerateEvents */
3229
3230
3231 //
3232 // Extension Mechanism functions
3233 //
3234
3235 // extension_count_ptr - pre-checked for NULL
3236 // extensions - pre-checked for NULL
3237 jvmtiError
3238 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3239 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3240 } /* end GetExtensionFunctions */
3241
3242
3243 // extension_count_ptr - pre-checked for NULL
3244 // extensions - pre-checked for NULL
3245 jvmtiError
3246 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3247 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3248 } /* end GetExtensionEvents */
3249
3250
3251 // callback - NULL is a valid value, must be checked
3252 jvmtiError
3253 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3254 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3255 } /* end SetExtensionEventCallback */
3256
3257 //
3258 // Timers functions
3259 //
3260
3261 // info_ptr - pre-checked for NULL
3262 jvmtiError
3263 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3264 os::current_thread_cpu_time_info(info_ptr);
3265 return JVMTI_ERROR_NONE;
3266 } /* end GetCurrentThreadCpuTimerInfo */
3267
3268
3269 // nanos_ptr - pre-checked for NULL
3270 jvmtiError
3271 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3272 *nanos_ptr = os::current_thread_cpu_time();
3273 return JVMTI_ERROR_NONE;
3274 } /* end GetCurrentThreadCpuTime */
3275
3276
3277 // info_ptr - pre-checked for NULL
3278 jvmtiError
3279 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3280 os::thread_cpu_time_info(info_ptr);
3281 return JVMTI_ERROR_NONE;
3282 } /* end GetThreadCpuTimerInfo */
3283
3284
3285 // Threads_lock NOT held, java_thread not protected by lock
3286 // java_thread - pre-checked
3287 // nanos_ptr - pre-checked for NULL
3288 jvmtiError
3289 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3290 *nanos_ptr = os::thread_cpu_time(java_thread);
3291 return JVMTI_ERROR_NONE;
3292 } /* end GetThreadCpuTime */
3293
3294
3295 // info_ptr - pre-checked for NULL
3296 jvmtiError
3297 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3298 os::javaTimeNanos_info(info_ptr);
3299 return JVMTI_ERROR_NONE;
3300 } /* end GetTimerInfo */
3301
3302
3303 // nanos_ptr - pre-checked for NULL
3304 jvmtiError
3305 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3306 *nanos_ptr = os::javaTimeNanos();
3307 return JVMTI_ERROR_NONE;
3308 } /* end GetTime */
3309
3310
3311 // processor_count_ptr - pre-checked for NULL
3312 jvmtiError
3313 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3314 *processor_count_ptr = os::active_processor_count();
3315 return JVMTI_ERROR_NONE;
3316 } /* end GetAvailableProcessors */
3317
3318 //
3319 // System Properties functions
3320 //
3321
3322 // count_ptr - pre-checked for NULL
3323 // property_ptr - pre-checked for NULL
3324 jvmtiError
3325 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3326 jvmtiError err = JVMTI_ERROR_NONE;
3327
3328 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3329
3330 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3331 if (err != JVMTI_ERROR_NONE) {
3332 return err;
3333 }
3334 int i = 0 ;
3335 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3336 const char *key = p->key();
3337 char **tmp_value = *property_ptr+i;
3338 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3339 if (err == JVMTI_ERROR_NONE) {
3340 strcpy(*tmp_value, key);
3341 } else {
3342 // clean up previously allocated memory.
3343 for (int j=0; j<i; j++) {
3344 Deallocate((unsigned char*)*property_ptr+j);
3345 }
3346 Deallocate((unsigned char*)property_ptr);
3347 break;
3348 }
3349 }
3350 return err;
3351 } /* end GetSystemProperties */
3352
3353
3354 // property - pre-checked for NULL
3355 // value_ptr - pre-checked for NULL
3356 jvmtiError
3357 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3358 jvmtiError err = JVMTI_ERROR_NONE;
3359 const char *value;
3360
3361 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3362 if (value == NULL) {
3363 err = JVMTI_ERROR_NOT_AVAILABLE;
3364 } else {
3365 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3366 if (err == JVMTI_ERROR_NONE) {
3367 strcpy(*value_ptr, value);
3368 }
3369 }
3370 return err;
3371 } /* end GetSystemProperty */
3372
3373
3374 // property - pre-checked for NULL
3375 // value - NULL is a valid value, must be checked
3376 jvmtiError
3377 JvmtiEnv::SetSystemProperty(const char* property, const char* value) {
3378 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3379
3380 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3381 if (strcmp(property, p->key()) == 0) {
3382 if (p->set_value((char *)value)) {
3383 err = JVMTI_ERROR_NONE;
3384 }
3385 }
3386 }
3387 return err;
3388 } /* end SetSystemProperty */
3389
3390 #endif // !JVMTI_KERNEL