1 /*
2 * Copyright (c) 2003, 2014, 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 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "interpreter/bytecodeStream.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "jvmtifiles/jvmtiEnv.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "memory/universe.inline.hpp"
33 #include "oops/instanceKlass.hpp"
34 #include "prims/jniCheck.hpp"
35 #include "prims/jvm_misc.hpp"
36 #include "prims/jvmtiAgentThread.hpp"
37 #include "prims/jvmtiClassFileReconstituter.hpp"
38 #include "prims/jvmtiCodeBlobEvents.hpp"
39 #include "prims/jvmtiExtensions.hpp"
40 #include "prims/jvmtiGetLoadedClasses.hpp"
41 #include "prims/jvmtiImpl.hpp"
42 #include "prims/jvmtiManageCapabilities.hpp"
43 #include "prims/jvmtiRawMonitor.hpp"
44 #include "prims/jvmtiRedefineClasses.hpp"
45 #include "prims/jvmtiTagMap.hpp"
46 #include "prims/jvmtiThreadState.inline.hpp"
47 #include "prims/jvmtiUtil.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/deoptimization.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/osThread.hpp"
54 #include "runtime/reflectionUtils.hpp"
55 #include "runtime/signature.hpp"
56 #include "runtime/thread.inline.hpp"
57 #include "runtime/vframe.hpp"
58 #include "runtime/vmThread.hpp"
59 #include "services/threadService.hpp"
60 #include "utilities/exceptions.hpp"
61 #include "utilities/preserveException.hpp"
62
63
64 #define FIXLATER 0 // REMOVE this when completed.
65
66 // FIXLATER: hook into JvmtiTrace
67 #define TraceJVMTICalls false
68
69 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
70 }
71
72 JvmtiEnv::~JvmtiEnv() {
73 }
74
75 JvmtiEnv*
76 JvmtiEnv::create_a_jvmti(jint version) {
77 return new JvmtiEnv(version);
78 }
79
80 // VM operation class to copy jni function table at safepoint.
81 // More than one java threads or jvmti agents may be reading/
82 // modifying jni function tables. To reduce the risk of bad
83 // interaction b/w these threads it is copied at safepoint.
84 class VM_JNIFunctionTableCopier : public VM_Operation {
85 private:
86 const struct JNINativeInterface_ *_function_table;
87 public:
88 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
89 _function_table = func_tbl;
90 };
91
92 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
93 void doit() {
94 copy_jni_function_table(_function_table);
95 };
96 };
97
98 //
99 // Do not change the "prefix" marker below, everything above it is copied
100 // unchanged into the filled stub, everything below is controlled by the
101 // stub filler (only method bodies are carried forward, and then only for
102 // functionality still in the spec).
103 //
104 // end file prefix
105
106 //
107 // Memory Management functions
108 //
109
110 // mem_ptr - pre-checked for NULL
111 jvmtiError
112 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
113 return allocate(size, mem_ptr);
114 } /* end Allocate */
115
116
117 // mem - NULL is a valid value, must be checked
118 jvmtiError
119 JvmtiEnv::Deallocate(unsigned char* mem) {
120 return deallocate(mem);
121 } /* end Deallocate */
122
123 // Threads_lock NOT held, java_thread not protected by lock
124 // java_thread - pre-checked
125 // data - NULL is a valid value, must be checked
126 jvmtiError
127 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
128 JvmtiThreadState* state = java_thread->jvmti_thread_state();
129 if (state == NULL) {
130 if (data == NULL) {
131 // leaving state unset same as data set to NULL
132 return JVMTI_ERROR_NONE;
133 }
134 // otherwise, create the state
135 state = JvmtiThreadState::state_for(java_thread);
136 if (state == NULL) {
137 return JVMTI_ERROR_THREAD_NOT_ALIVE;
138 }
139 }
140 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
141 return JVMTI_ERROR_NONE;
142 } /* end SetThreadLocalStorage */
143
144
145 // Threads_lock NOT held
146 // thread - NOT pre-checked
147 // data_ptr - pre-checked for NULL
148 jvmtiError
149 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
150 JavaThread* current_thread = JavaThread::current();
151 if (thread == NULL) {
152 JvmtiThreadState* state = current_thread->jvmti_thread_state();
153 *data_ptr = (state == NULL) ? NULL :
154 state->env_thread_state(this)->get_agent_thread_local_storage_data();
155 } else {
156
157 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
158 // the thread to _thread_in_vm. However, when the TLS for a thread
159 // other than the current thread is required we need to transition
160 // from native so as to resolve the jthread.
161
162 ThreadInVMfromNative __tiv(current_thread);
163 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
164 debug_only(VMNativeEntryWrapper __vew;)
165
166 oop thread_oop = JNIHandles::resolve_external_guard(thread);
167 if (thread_oop == NULL) {
168 return JVMTI_ERROR_INVALID_THREAD;
169 }
170 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
171 return JVMTI_ERROR_INVALID_THREAD;
172 }
173 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
174 if (java_thread == NULL) {
175 return JVMTI_ERROR_THREAD_NOT_ALIVE;
176 }
177 JvmtiThreadState* state = java_thread->jvmti_thread_state();
178 *data_ptr = (state == NULL) ? NULL :
179 state->env_thread_state(this)->get_agent_thread_local_storage_data();
180 }
181 return JVMTI_ERROR_NONE;
182 } /* end GetThreadLocalStorage */
183
184 //
185 // Class functions
186 //
187
188 // class_count_ptr - pre-checked for NULL
189 // classes_ptr - pre-checked for NULL
190 jvmtiError
191 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
192 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
193 } /* end GetLoadedClasses */
194
195
196 // initiating_loader - NULL is a valid value, must be checked
197 // class_count_ptr - pre-checked for NULL
198 // classes_ptr - pre-checked for NULL
199 jvmtiError
200 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
201 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
202 class_count_ptr, classes_ptr);
203 } /* end GetClassLoaderClasses */
204
205 // k_mirror - may be primitive, this must be checked
206 // is_modifiable_class_ptr - pre-checked for NULL
207 jvmtiError
208 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
209 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
210 JNI_TRUE : JNI_FALSE;
211 return JVMTI_ERROR_NONE;
212 } /* end IsModifiableClass */
213
214 // class_count - pre-checked to be greater than or equal to 0
215 // classes - pre-checked for NULL
216 jvmtiError
217 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
218 //TODO: add locking
219
220 int index;
221 JavaThread* current_thread = JavaThread::current();
222 ResourceMark rm(current_thread);
223
224 jvmtiClassDefinition* class_definitions =
225 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
226 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
227
228 for (index = 0; index < class_count; index++) {
229 HandleMark hm(current_thread);
230
231 jclass jcls = classes[index];
232 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
233 if (k_mirror == NULL) {
234 return JVMTI_ERROR_INVALID_CLASS;
235 }
236 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
237 return JVMTI_ERROR_INVALID_CLASS;
238 }
239
240 if (java_lang_Class::is_primitive(k_mirror)) {
241 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
242 }
243
244 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
245 KlassHandle klass(current_thread, k_oop);
246
247 jint status = klass->jvmti_class_status();
248 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
249 return JVMTI_ERROR_INVALID_CLASS;
250 }
251 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
252 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
253 }
254
255 instanceKlassHandle ikh(current_thread, k_oop);
256 if (ikh->get_cached_class_file_bytes() == NULL) {
257 // Not cached, we need to reconstitute the class file from the
258 // VM representation. We don't attach the reconstituted class
259 // bytes to the InstanceKlass here because they have not been
260 // validated and we're not at a safepoint.
261 constantPoolHandle constants(current_thread, ikh->constants());
262 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
263
264 JvmtiClassFileReconstituter reconstituter(ikh);
265 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
266 return reconstituter.get_error();
267 }
268
269 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
270 class_definitions[index].class_bytes = (unsigned char*)
271 reconstituter.class_file_bytes();
272 } else {
273 // it is cached, get it from the cache
274 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
275 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
276 }
277 class_definitions[index].klass = jcls;
278 }
279 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
280 VMThread::execute(&op);
281 return (op.check_error());
282 } /* end RetransformClasses */
283
284
285 // class_count - pre-checked to be greater than or equal to 0
286 // class_definitions - pre-checked for NULL
287 jvmtiError
288 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
289 //TODO: add locking
290 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
291 VMThread::execute(&op);
292 return (op.check_error());
293 } /* end RedefineClasses */
294
295
296 //
297 // Object functions
298 //
299
300 // size_ptr - pre-checked for NULL
301 jvmtiError
302 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
303 oop mirror = JNIHandles::resolve_external_guard(object);
304 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
305
306 if (mirror->klass() == SystemDictionary::Class_klass() &&
307 !java_lang_Class::is_primitive(mirror)) {
308 Klass* k = java_lang_Class::as_Klass(mirror);
309 assert(k != NULL, "class for non-primitive mirror must exist");
310 *size_ptr = k->size() * wordSize;
311 } else {
312 *size_ptr = mirror->size() * wordSize;
313 }
314 return JVMTI_ERROR_NONE;
315 } /* end GetObjectSize */
316
317 //
318 // Method functions
319 //
320
321 // prefix - NULL is a valid value, must be checked
322 jvmtiError
323 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
324 return prefix == NULL?
325 SetNativeMethodPrefixes(0, NULL) :
326 SetNativeMethodPrefixes(1, (char**)&prefix);
327 } /* end SetNativeMethodPrefix */
328
329
330 // prefix_count - pre-checked to be greater than or equal to 0
331 // prefixes - pre-checked for NULL
332 jvmtiError
333 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
334 // Have to grab JVMTI thread state lock to be sure that some thread
335 // isn't accessing the prefixes at the same time we are setting them.
336 // No locks during VM bring-up.
337 if (Threads::number_of_threads() == 0) {
338 return set_native_method_prefixes(prefix_count, prefixes);
339 } else {
340 MutexLocker mu(JvmtiThreadState_lock);
341 return set_native_method_prefixes(prefix_count, prefixes);
342 }
343 } /* end SetNativeMethodPrefixes */
344
345 //
346 // Event Management functions
347 //
348
349 // callbacks - NULL is a valid value, must be checked
350 // size_of_callbacks - pre-checked to be greater than or equal to 0
351 jvmtiError
352 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
353 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
354 return JVMTI_ERROR_NONE;
355 } /* end SetEventCallbacks */
356
357
358 // event_thread - NULL is a valid value, must be checked
359 jvmtiError
360 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
361 JavaThread* java_thread = NULL;
362 if (event_thread != NULL) {
363 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
364 if (thread_oop == NULL) {
365 return JVMTI_ERROR_INVALID_THREAD;
366 }
367 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
368 return JVMTI_ERROR_INVALID_THREAD;
369 }
370 java_thread = java_lang_Thread::thread(thread_oop);
371 if (java_thread == NULL) {
372 return JVMTI_ERROR_THREAD_NOT_ALIVE;
373 }
374 }
375
376 // event_type must be valid
377 if (!JvmtiEventController::is_valid_event_type(event_type)) {
378 return JVMTI_ERROR_INVALID_EVENT_TYPE;
379 }
380
381 // global events cannot be controlled at thread level.
382 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
383 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
384 }
385
386 bool enabled = (mode == JVMTI_ENABLE);
387
388 // assure that needed capabilities are present
389 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
390 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
391 }
392
393 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
394 record_class_file_load_hook_enabled();
395 }
396 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
397
398 return JVMTI_ERROR_NONE;
399 } /* end SetEventNotificationMode */
400
401 //
402 // Capability functions
403 //
404
405 // capabilities_ptr - pre-checked for NULL
406 jvmtiError
407 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
408 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
409 get_prohibited_capabilities(),
410 capabilities_ptr);
411 return JVMTI_ERROR_NONE;
412 } /* end GetPotentialCapabilities */
413
414
415 // capabilities_ptr - pre-checked for NULL
416 jvmtiError
417 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
418 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
419 get_prohibited_capabilities(),
420 capabilities_ptr,
421 get_capabilities());
422 } /* end AddCapabilities */
423
424
425 // capabilities_ptr - pre-checked for NULL
426 jvmtiError
427 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
428 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
429 return JVMTI_ERROR_NONE;
430 } /* end RelinquishCapabilities */
431
432
433 // capabilities_ptr - pre-checked for NULL
434 jvmtiError
435 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
436 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
437 return JVMTI_ERROR_NONE;
438 } /* end GetCapabilities */
439
440 //
441 // Class Loader Search functions
442 //
443
444 // segment - pre-checked for NULL
445 jvmtiError
446 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
447 jvmtiPhase phase = get_phase();
448 if (phase == JVMTI_PHASE_ONLOAD) {
449 Arguments::append_sysclasspath(segment);
450 return JVMTI_ERROR_NONE;
451 } else if (use_version_1_0_semantics()) {
452 // This JvmtiEnv requested version 1.0 semantics and this function
453 // is only allowed in the ONLOAD phase in version 1.0 so we need to
454 // return an error here.
455 return JVMTI_ERROR_WRONG_PHASE;
456 } else if (phase == JVMTI_PHASE_LIVE) {
457 // The phase is checked by the wrapper that called this function,
458 // but this thread could be racing with the thread that is
459 // terminating the VM so we check one more time.
460
461 // create the zip entry
462 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
463 if (zip_entry == NULL) {
464 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
465 }
466
467 // lock the loader
468 Thread* thread = Thread::current();
469 HandleMark hm;
470 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
471
472 ObjectLocker ol(loader_lock, thread);
473
474 // add the jar file to the bootclasspath
475 if (TraceClassLoading) {
476 tty->print_cr("[Opened %s]", zip_entry->name());
477 }
478 ClassLoader::add_to_list(zip_entry);
479 return JVMTI_ERROR_NONE;
480 } else {
481 return JVMTI_ERROR_WRONG_PHASE;
482 }
483
484 } /* end AddToBootstrapClassLoaderSearch */
485
486
487 // segment - pre-checked for NULL
488 jvmtiError
489 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
490 jvmtiPhase phase = get_phase();
491
492 if (phase == JVMTI_PHASE_ONLOAD) {
493 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
494 if (strcmp("java.class.path", p->key()) == 0) {
495 p->append_value(segment);
496 break;
497 }
498 }
499 return JVMTI_ERROR_NONE;
500 } else if (phase == JVMTI_PHASE_LIVE) {
501 // The phase is checked by the wrapper that called this function,
502 // but this thread could be racing with the thread that is
503 // terminating the VM so we check one more time.
504 HandleMark hm;
505
506 // create the zip entry (which will open the zip file and hence
507 // check that the segment is indeed a zip file).
508 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
509 if (zip_entry == NULL) {
510 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
511 }
512 delete zip_entry; // no longer needed
513
514 // lock the loader
515 Thread* THREAD = Thread::current();
516 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
517
518 ObjectLocker ol(loader, THREAD);
519
520 // need the path as java.lang.String
521 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
522 if (HAS_PENDING_EXCEPTION) {
523 CLEAR_PENDING_EXCEPTION;
524 return JVMTI_ERROR_INTERNAL;
525 }
526
527 instanceKlassHandle loader_ik(THREAD, loader->klass());
528
529 // Invoke the appendToClassPathForInstrumentation method - if the method
530 // is not found it means the loader doesn't support adding to the class path
531 // in the live phase.
532 {
533 JavaValue res(T_VOID);
534 JavaCalls::call_special(&res,
535 loader,
536 loader_ik,
537 vmSymbols::appendToClassPathForInstrumentation_name(),
538 vmSymbols::appendToClassPathForInstrumentation_signature(),
539 path,
540 THREAD);
541 if (HAS_PENDING_EXCEPTION) {
542 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
543 CLEAR_PENDING_EXCEPTION;
544
545 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
546 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
547 } else {
548 return JVMTI_ERROR_INTERNAL;
549 }
550 }
551 }
552
553 return JVMTI_ERROR_NONE;
554 } else {
555 return JVMTI_ERROR_WRONG_PHASE;
556 }
557 } /* end AddToSystemClassLoaderSearch */
558
559 //
560 // General functions
561 //
562
563 // phase_ptr - pre-checked for NULL
564 jvmtiError
565 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
566 *phase_ptr = get_phase();
567 return JVMTI_ERROR_NONE;
568 } /* end GetPhase */
569
570
571 jvmtiError
572 JvmtiEnv::DisposeEnvironment() {
573 dispose();
574 return JVMTI_ERROR_NONE;
575 } /* end DisposeEnvironment */
576
577
578 // data - NULL is a valid value, must be checked
579 jvmtiError
580 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
581 set_env_local_storage(data);
582 return JVMTI_ERROR_NONE;
583 } /* end SetEnvironmentLocalStorage */
584
585
586 // data_ptr - pre-checked for NULL
587 jvmtiError
588 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
589 *data_ptr = (void*)get_env_local_storage();
590 return JVMTI_ERROR_NONE;
591 } /* end GetEnvironmentLocalStorage */
592
593 // version_ptr - pre-checked for NULL
594 jvmtiError
595 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
596 *version_ptr = JVMTI_VERSION;
597 return JVMTI_ERROR_NONE;
598 } /* end GetVersionNumber */
599
600
601 // name_ptr - pre-checked for NULL
602 jvmtiError
603 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
604 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
605 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
606 }
607 const char *name = JvmtiUtil::error_name(error);
608 if (name == NULL) {
609 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
610 }
611 size_t len = strlen(name) + 1;
612 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
613 if (err == JVMTI_ERROR_NONE) {
614 memcpy(*name_ptr, name, len);
615 }
616 return err;
617 } /* end GetErrorName */
618
619
620 jvmtiError
621 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
622 switch (flag) {
623 case JVMTI_VERBOSE_OTHER:
624 // ignore
625 break;
626 case JVMTI_VERBOSE_CLASS:
627 TraceClassLoading = value != 0;
628 TraceClassUnloading = value != 0;
629 break;
630 case JVMTI_VERBOSE_GC:
631 PrintGC = value != 0;
632 break;
633 case JVMTI_VERBOSE_JNI:
634 PrintJNIResolving = value != 0;
635 break;
636 default:
637 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
638 };
639 return JVMTI_ERROR_NONE;
640 } /* end SetVerboseFlag */
641
642
643 // format_ptr - pre-checked for NULL
644 jvmtiError
645 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
646 *format_ptr = JVMTI_JLOCATION_JVMBCI;
647 return JVMTI_ERROR_NONE;
648 } /* end GetJLocationFormat */
649
650 //
651 // Thread functions
652 //
653
654 // Threads_lock NOT held
655 // thread - NOT pre-checked
656 // thread_state_ptr - pre-checked for NULL
657 jvmtiError
658 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
659 jint state;
660 oop thread_oop;
661 JavaThread* thr;
662
663 if (thread == NULL) {
664 thread_oop = JavaThread::current()->threadObj();
665 } else {
666 thread_oop = JNIHandles::resolve_external_guard(thread);
667 }
668
669 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
670 return JVMTI_ERROR_INVALID_THREAD;
671 }
672
673 // get most state bits
674 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
675
676 // add more state bits
677 thr = java_lang_Thread::thread(thread_oop);
678 if (thr != NULL) {
679 JavaThreadState jts = thr->thread_state();
680
681 if (thr->is_being_ext_suspended()) {
682 state |= JVMTI_THREAD_STATE_SUSPENDED;
683 }
684 if (jts == _thread_in_native) {
685 state |= JVMTI_THREAD_STATE_IN_NATIVE;
686 }
687 OSThread* osThread = thr->osthread();
688 if (osThread != NULL && osThread->interrupted()) {
689 state |= JVMTI_THREAD_STATE_INTERRUPTED;
690 }
691 }
692
693 *thread_state_ptr = state;
694 return JVMTI_ERROR_NONE;
695 } /* end GetThreadState */
696
697
698 // thread_ptr - pre-checked for NULL
699 jvmtiError
700 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
701 JavaThread* current_thread = JavaThread::current();
702 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
703 return JVMTI_ERROR_NONE;
704 } /* end GetCurrentThread */
705
706
707 // threads_count_ptr - pre-checked for NULL
708 // threads_ptr - pre-checked for NULL
709 jvmtiError
710 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
711 int nthreads = 0;
712 Handle *thread_objs = NULL;
713 ResourceMark rm;
714 HandleMark hm;
715
716 // enumerate threads (including agent threads)
717 ThreadsListEnumerator tle(Thread::current(), true);
718 nthreads = tle.num_threads();
719 *threads_count_ptr = nthreads;
720
721 if (nthreads == 0) {
722 *threads_ptr = NULL;
723 return JVMTI_ERROR_NONE;
724 }
725
726 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
727 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
728
729 for (int i=0; i < nthreads; i++) {
730 thread_objs[i] = Handle(tle.get_threadObj(i));
731 }
732
733 // have to make global handles outside of Threads_lock
734 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
735 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
736
737 *threads_ptr = jthreads;
738 return JVMTI_ERROR_NONE;
739 } /* end GetAllThreads */
740
741
742 // Threads_lock NOT held, java_thread not protected by lock
743 // java_thread - pre-checked
744 jvmtiError
745 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
746 // don't allow hidden thread suspend request.
747 if (java_thread->is_hidden_from_external_view()) {
748 return (JVMTI_ERROR_NONE);
749 }
750
751 {
752 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
753 if (java_thread->is_external_suspend()) {
754 // don't allow nested external suspend requests.
755 return (JVMTI_ERROR_THREAD_SUSPENDED);
756 }
757 if (java_thread->is_exiting()) { // thread is in the process of exiting
758 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
759 }
760 java_thread->set_external_suspend();
761 }
762
763 if (!JvmtiSuspendControl::suspend(java_thread)) {
764 // the thread was in the process of exiting
765 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
766 }
767 return JVMTI_ERROR_NONE;
768 } /* end SuspendThread */
769
770
771 // request_count - pre-checked to be greater than or equal to 0
772 // request_list - pre-checked for NULL
773 // results - pre-checked for NULL
774 jvmtiError
775 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
776 int needSafepoint = 0; // > 0 if we need a safepoint
777 for (int i = 0; i < request_count; i++) {
778 JavaThread *java_thread = get_JavaThread(request_list[i]);
779 if (java_thread == NULL) {
780 results[i] = JVMTI_ERROR_INVALID_THREAD;
781 continue;
782 }
783 // the thread has not yet run or has exited (not on threads list)
784 if (java_thread->threadObj() == NULL) {
785 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
786 continue;
787 }
788 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
789 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
790 continue;
791 }
792 // don't allow hidden thread suspend request.
793 if (java_thread->is_hidden_from_external_view()) {
794 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
795 continue;
796 }
797
798 {
799 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
800 if (java_thread->is_external_suspend()) {
801 // don't allow nested external suspend requests.
802 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
803 continue;
804 }
805 if (java_thread->is_exiting()) { // thread is in the process of exiting
806 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
807 continue;
808 }
809 java_thread->set_external_suspend();
810 }
811 if (java_thread->thread_state() == _thread_in_native) {
812 // We need to try and suspend native threads here. Threads in
813 // other states will self-suspend on their next transition.
814 if (!JvmtiSuspendControl::suspend(java_thread)) {
815 // The thread was in the process of exiting. Force another
816 // safepoint to make sure that this thread transitions.
817 needSafepoint++;
818 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
819 continue;
820 }
821 } else {
822 needSafepoint++;
823 }
824 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
825 }
826 if (needSafepoint > 0) {
827 VM_ForceSafepoint vfs;
828 VMThread::execute(&vfs);
829 }
830 // per-thread suspend results returned via results parameter
831 return JVMTI_ERROR_NONE;
832 } /* end SuspendThreadList */
833
834
835 // Threads_lock NOT held, java_thread not protected by lock
836 // java_thread - pre-checked
837 jvmtiError
838 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
839 // don't allow hidden thread resume request.
840 if (java_thread->is_hidden_from_external_view()) {
841 return JVMTI_ERROR_NONE;
842 }
843
844 if (!java_thread->is_being_ext_suspended()) {
845 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
846 }
847
848 if (!JvmtiSuspendControl::resume(java_thread)) {
849 return JVMTI_ERROR_INTERNAL;
850 }
851 return JVMTI_ERROR_NONE;
852 } /* end ResumeThread */
853
854
855 // request_count - pre-checked to be greater than or equal to 0
856 // request_list - pre-checked for NULL
857 // results - pre-checked for NULL
858 jvmtiError
859 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
860 for (int i = 0; i < request_count; i++) {
861 JavaThread *java_thread = get_JavaThread(request_list[i]);
862 if (java_thread == NULL) {
863 results[i] = JVMTI_ERROR_INVALID_THREAD;
864 continue;
865 }
866 // don't allow hidden thread resume request.
867 if (java_thread->is_hidden_from_external_view()) {
868 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
869 continue;
870 }
871 if (!java_thread->is_being_ext_suspended()) {
872 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
873 continue;
874 }
875
876 if (!JvmtiSuspendControl::resume(java_thread)) {
877 results[i] = JVMTI_ERROR_INTERNAL;
878 continue;
879 }
880
881 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
882 }
883 // per-thread resume results returned via results parameter
884 return JVMTI_ERROR_NONE;
885 } /* end ResumeThreadList */
886
887
888 // Threads_lock NOT held, java_thread not protected by lock
889 // java_thread - pre-checked
890 jvmtiError
891 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
892 oop e = JNIHandles::resolve_external_guard(exception);
893 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
894
895 JavaThread::send_async_exception(java_thread->threadObj(), e);
896
897 return JVMTI_ERROR_NONE;
898
899 } /* end StopThread */
900
901
902 // Threads_lock NOT held
903 // thread - NOT pre-checked
904 jvmtiError
905 JvmtiEnv::InterruptThread(jthread thread) {
906 oop thread_oop = JNIHandles::resolve_external_guard(thread);
907 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
908 return JVMTI_ERROR_INVALID_THREAD;
909
910 JavaThread* current_thread = JavaThread::current();
911
912 // Todo: this is a duplicate of JVM_Interrupt; share code in future
913 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
914 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
915 // We need to re-resolve the java_thread, since a GC might have happened during the
916 // acquire of the lock
917
918 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
919 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
920
921 Thread::interrupt(java_thread);
922
923 return JVMTI_ERROR_NONE;
924 } /* end InterruptThread */
925
926
927 // Threads_lock NOT held
928 // thread - NOT pre-checked
929 // info_ptr - pre-checked for NULL
930 jvmtiError
931 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
932 ResourceMark rm;
933 HandleMark hm;
934
935 JavaThread* current_thread = JavaThread::current();
936
937 // if thread is NULL the current thread is used
938 oop thread_oop;
939 if (thread == NULL) {
940 thread_oop = current_thread->threadObj();
941 } else {
942 thread_oop = JNIHandles::resolve_external_guard(thread);
943 }
944 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
945 return JVMTI_ERROR_INVALID_THREAD;
946
947 Handle thread_obj(current_thread, thread_oop);
948 typeArrayHandle name;
949 ThreadPriority priority;
950 Handle thread_group;
951 Handle context_class_loader;
952 bool is_daemon;
953
954 { MutexLocker mu(Threads_lock);
955
956 name = typeArrayHandle(current_thread, java_lang_Thread::name(thread_obj()));
957 priority = java_lang_Thread::priority(thread_obj());
958 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
959 is_daemon = java_lang_Thread::is_daemon(thread_obj());
960
961 oop loader = java_lang_Thread::context_class_loader(thread_obj());
962 context_class_loader = Handle(current_thread, loader);
963 }
964 { const char *n;
965
966 if (name() != NULL) {
967 n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
968 } else {
969 n = UNICODE::as_utf8(NULL, 0);
970 }
971
972 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
973 if (info_ptr->name == NULL)
974 return JVMTI_ERROR_OUT_OF_MEMORY;
975
976 strcpy(info_ptr->name, n);
977 }
978 info_ptr->is_daemon = is_daemon;
979 info_ptr->priority = priority;
980
981 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
982 jni_reference(context_class_loader);
983 info_ptr->thread_group = jni_reference(thread_group);
984
985 return JVMTI_ERROR_NONE;
986 } /* end GetThreadInfo */
987
988
989 // Threads_lock NOT held, java_thread not protected by lock
990 // java_thread - pre-checked
991 // owned_monitor_count_ptr - pre-checked for NULL
992 // owned_monitors_ptr - pre-checked for NULL
993 jvmtiError
994 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
995 jvmtiError err = JVMTI_ERROR_NONE;
996 JavaThread* calling_thread = JavaThread::current();
997
998 // growable array of jvmti monitors info on the C-heap
999 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1000 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1001
1002 // It is only safe to perform the direct operation on the current
1003 // thread. All other usage needs to use a vm-safepoint-op for safety.
1004 if (java_thread == calling_thread) {
1005 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1006 } else {
1007 // JVMTI get monitors info at safepoint. Do not require target thread to
1008 // be suspended.
1009 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1010 VMThread::execute(&op);
1011 err = op.result();
1012 }
1013 jint owned_monitor_count = owned_monitors_list->length();
1014 if (err == JVMTI_ERROR_NONE) {
1015 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1016 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1017 // copy into the returned array
1018 for (int i = 0; i < owned_monitor_count; i++) {
1019 (*owned_monitors_ptr)[i] =
1020 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1021 }
1022 *owned_monitor_count_ptr = owned_monitor_count;
1023 }
1024 }
1025 // clean up.
1026 for (int i = 0; i < owned_monitor_count; i++) {
1027 deallocate((unsigned char*)owned_monitors_list->at(i));
1028 }
1029 delete owned_monitors_list;
1030
1031 return err;
1032 } /* end GetOwnedMonitorInfo */
1033
1034
1035 // Threads_lock NOT held, java_thread not protected by lock
1036 // java_thread - pre-checked
1037 // monitor_info_count_ptr - pre-checked for NULL
1038 // monitor_info_ptr - pre-checked for NULL
1039 jvmtiError
1040 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1041 jvmtiError err = JVMTI_ERROR_NONE;
1042 JavaThread* calling_thread = JavaThread::current();
1043
1044 // growable array of jvmti monitors info on the C-heap
1045 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1046 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1047
1048 // It is only safe to perform the direct operation on the current
1049 // thread. All other usage needs to use a vm-safepoint-op for safety.
1050 if (java_thread == calling_thread) {
1051 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1052 } else {
1053 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1054 // be suspended.
1055 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1056 VMThread::execute(&op);
1057 err = op.result();
1058 }
1059
1060 jint owned_monitor_count = owned_monitors_list->length();
1061 if (err == JVMTI_ERROR_NONE) {
1062 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1063 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1064 // copy to output array.
1065 for (int i = 0; i < owned_monitor_count; i++) {
1066 (*monitor_info_ptr)[i].monitor =
1067 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1068 (*monitor_info_ptr)[i].stack_depth =
1069 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1070 }
1071 }
1072 *monitor_info_count_ptr = owned_monitor_count;
1073 }
1074
1075 // clean up.
1076 for (int i = 0; i < owned_monitor_count; i++) {
1077 deallocate((unsigned char*)owned_monitors_list->at(i));
1078 }
1079 delete owned_monitors_list;
1080
1081 return err;
1082 } /* end GetOwnedMonitorStackDepthInfo */
1083
1084
1085 // Threads_lock NOT held, java_thread not protected by lock
1086 // java_thread - pre-checked
1087 // monitor_ptr - pre-checked for NULL
1088 jvmtiError
1089 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1090 jvmtiError err = JVMTI_ERROR_NONE;
1091 JavaThread* calling_thread = JavaThread::current();
1092
1093 // It is only safe to perform the direct operation on the current
1094 // thread. All other usage needs to use a vm-safepoint-op for safety.
1095 if (java_thread == calling_thread) {
1096 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1097 } else {
1098 // get contended monitor information at safepoint.
1099 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1100 VMThread::execute(&op);
1101 err = op.result();
1102 }
1103 return err;
1104 } /* end GetCurrentContendedMonitor */
1105
1106
1107 // Threads_lock NOT held
1108 // thread - NOT pre-checked
1109 // proc - pre-checked for NULL
1110 // arg - NULL is a valid value, must be checked
1111 jvmtiError
1112 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1113 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1114 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1115 return JVMTI_ERROR_INVALID_THREAD;
1116 }
1117 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1118 return JVMTI_ERROR_INVALID_PRIORITY;
1119 }
1120
1121 //Thread-self
1122 JavaThread* current_thread = JavaThread::current();
1123
1124 Handle thread_hndl(current_thread, thread_oop);
1125 {
1126 MutexLocker mu(Threads_lock); // grab Threads_lock
1127
1128 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1129
1130 // At this point it may be possible that no osthread was created for the
1131 // JavaThread due to lack of memory.
1132 if (new_thread == NULL || new_thread->osthread() == NULL) {
1133 if (new_thread) delete new_thread;
1134 return JVMTI_ERROR_OUT_OF_MEMORY;
1135 }
1136
1137 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1138 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1139 java_lang_Thread::set_daemon(thread_hndl());
1140
1141 new_thread->set_threadObj(thread_hndl());
1142 Threads::add(new_thread);
1143 Thread::start(new_thread);
1144 } // unlock Threads_lock
1145
1146 return JVMTI_ERROR_NONE;
1147 } /* end RunAgentThread */
1148
1149 //
1150 // Thread Group functions
1151 //
1152
1153 // group_count_ptr - pre-checked for NULL
1154 // groups_ptr - pre-checked for NULL
1155 jvmtiError
1156 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1157 JavaThread* current_thread = JavaThread::current();
1158
1159 // Only one top level thread group now.
1160 *group_count_ptr = 1;
1161
1162 // Allocate memory to store global-refs to the thread groups.
1163 // Assume this area is freed by caller.
1164 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1165
1166 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1167
1168 // Convert oop to Handle, then convert Handle to global-ref.
1169 {
1170 HandleMark hm(current_thread);
1171 Handle system_thread_group(current_thread, Universe::system_thread_group());
1172 *groups_ptr[0] = jni_reference(system_thread_group);
1173 }
1174
1175 return JVMTI_ERROR_NONE;
1176 } /* end GetTopThreadGroups */
1177
1178
1179 // info_ptr - pre-checked for NULL
1180 jvmtiError
1181 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1182 ResourceMark rm;
1183 HandleMark hm;
1184
1185 JavaThread* current_thread = JavaThread::current();
1186
1187 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1188 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1189
1190 typeArrayHandle name;
1191 Handle parent_group;
1192 bool is_daemon;
1193 ThreadPriority max_priority;
1194
1195 { MutexLocker mu(Threads_lock);
1196
1197 name = typeArrayHandle(current_thread,
1198 java_lang_ThreadGroup::name(group_obj()));
1199 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1200 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1201 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1202 }
1203
1204 info_ptr->is_daemon = is_daemon;
1205 info_ptr->max_priority = max_priority;
1206 info_ptr->parent = jni_reference(parent_group);
1207
1208 if (name() != NULL) {
1209 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
1210 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
1211 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1212 strcpy(info_ptr->name, n);
1213 } else {
1214 info_ptr->name = NULL;
1215 }
1216
1217 return JVMTI_ERROR_NONE;
1218 } /* end GetThreadGroupInfo */
1219
1220
1221 // thread_count_ptr - pre-checked for NULL
1222 // threads_ptr - pre-checked for NULL
1223 // group_count_ptr - pre-checked for NULL
1224 // groups_ptr - pre-checked for NULL
1225 jvmtiError
1226 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1227 JavaThread* current_thread = JavaThread::current();
1228 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1229 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1230
1231 Handle *thread_objs = NULL;
1232 Handle *group_objs = NULL;
1233 int nthreads = 0;
1234 int ngroups = 0;
1235 int hidden_threads = 0;
1236
1237 ResourceMark rm;
1238 HandleMark hm;
1239
1240 Handle group_hdl(current_thread, group_obj);
1241
1242 { MutexLocker mu(Threads_lock);
1243
1244 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1245 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1246
1247 if (nthreads > 0) {
1248 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1249 assert(nthreads <= threads->length(), "too many threads");
1250 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1251 for (int i=0, j=0; i<nthreads; i++) {
1252 oop thread_obj = threads->obj_at(i);
1253 assert(thread_obj != NULL, "thread_obj is NULL");
1254 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1255 // Filter out hidden java threads.
1256 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1257 hidden_threads++;
1258 continue;
1259 }
1260 thread_objs[j++] = Handle(current_thread, thread_obj);
1261 }
1262 nthreads -= hidden_threads;
1263 }
1264 if (ngroups > 0) {
1265 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1266 assert(ngroups <= groups->length(), "too many threads");
1267 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1268 for (int i=0; i<ngroups; i++) {
1269 oop group_obj = groups->obj_at(i);
1270 assert(group_obj != NULL, "group_obj != NULL");
1271 group_objs[i] = Handle(current_thread, group_obj);
1272 }
1273 }
1274 }
1275
1276 // have to make global handles outside of Threads_lock
1277 *group_count_ptr = ngroups;
1278 *thread_count_ptr = nthreads;
1279 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1280 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1281 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1282 return JVMTI_ERROR_OUT_OF_MEMORY;
1283 }
1284 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1285 return JVMTI_ERROR_OUT_OF_MEMORY;
1286 }
1287
1288 return JVMTI_ERROR_NONE;
1289 } /* end GetThreadGroupChildren */
1290
1291
1292 //
1293 // Stack Frame functions
1294 //
1295
1296 // Threads_lock NOT held, java_thread not protected by lock
1297 // java_thread - pre-checked
1298 // max_frame_count - pre-checked to be greater than or equal to 0
1299 // frame_buffer - pre-checked for NULL
1300 // count_ptr - pre-checked for NULL
1301 jvmtiError
1302 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1303 jvmtiError err = JVMTI_ERROR_NONE;
1304
1305 // It is only safe to perform the direct operation on the current
1306 // thread. All other usage needs to use a vm-safepoint-op for safety.
1307 if (java_thread == JavaThread::current()) {
1308 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1309 } else {
1310 // JVMTI get stack trace at safepoint. Do not require target thread to
1311 // be suspended.
1312 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1313 VMThread::execute(&op);
1314 err = op.result();
1315 }
1316
1317 return err;
1318 } /* end GetStackTrace */
1319
1320
1321 // max_frame_count - pre-checked to be greater than or equal to 0
1322 // stack_info_ptr - pre-checked for NULL
1323 // thread_count_ptr - pre-checked for NULL
1324 jvmtiError
1325 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1326 jvmtiError err = JVMTI_ERROR_NONE;
1327 JavaThread* calling_thread = JavaThread::current();
1328
1329 // JVMTI get stack traces at safepoint.
1330 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1331 VMThread::execute(&op);
1332 *thread_count_ptr = op.final_thread_count();
1333 *stack_info_ptr = op.stack_info();
1334 err = op.result();
1335 return err;
1336 } /* end GetAllStackTraces */
1337
1338
1339 // thread_count - pre-checked to be greater than or equal to 0
1340 // thread_list - pre-checked for NULL
1341 // max_frame_count - pre-checked to be greater than or equal to 0
1342 // stack_info_ptr - pre-checked for NULL
1343 jvmtiError
1344 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1345 jvmtiError err = JVMTI_ERROR_NONE;
1346 // JVMTI get stack traces at safepoint.
1347 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1348 VMThread::execute(&op);
1349 err = op.result();
1350 if (err == JVMTI_ERROR_NONE) {
1351 *stack_info_ptr = op.stack_info();
1352 }
1353 return err;
1354 } /* end GetThreadListStackTraces */
1355
1356
1357 // Threads_lock NOT held, java_thread not protected by lock
1358 // java_thread - pre-checked
1359 // count_ptr - pre-checked for NULL
1360 jvmtiError
1361 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1362 jvmtiError err = JVMTI_ERROR_NONE;
1363
1364 // retrieve or create JvmtiThreadState.
1365 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1366 if (state == NULL) {
1367 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1368 }
1369
1370 // It is only safe to perform the direct operation on the current
1371 // thread. All other usage needs to use a vm-safepoint-op for safety.
1372 if (java_thread == JavaThread::current()) {
1373 err = get_frame_count(state, count_ptr);
1374 } else {
1375 // get java stack frame count at safepoint.
1376 VM_GetFrameCount op(this, state, count_ptr);
1377 VMThread::execute(&op);
1378 err = op.result();
1379 }
1380 return err;
1381 } /* end GetFrameCount */
1382
1383
1384 // Threads_lock NOT held, java_thread not protected by lock
1385 // java_thread - pre-checked
1386 jvmtiError
1387 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1388 JavaThread* current_thread = JavaThread::current();
1389 HandleMark hm(current_thread);
1390 uint32_t debug_bits = 0;
1391
1392 // retrieve or create the state
1393 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1394 if (state == NULL) {
1395 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1396 }
1397
1398 // Check if java_thread is fully suspended
1399 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1400 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1401 }
1402 // Check to see if a PopFrame was already in progress
1403 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1404 // Probably possible for JVMTI clients to trigger this, but the
1405 // JPDA backend shouldn't allow this to happen
1406 return JVMTI_ERROR_INTERNAL;
1407 }
1408
1409 {
1410 // Was workaround bug
1411 // 4812902: popFrame hangs if the method is waiting at a synchronize
1412 // Catch this condition and return an error to avoid hanging.
1413 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1414 OSThread* osThread = java_thread->osthread();
1415 if (osThread->get_state() == MONITOR_WAIT) {
1416 return JVMTI_ERROR_OPAQUE_FRAME;
1417 }
1418 }
1419
1420 {
1421 ResourceMark rm(current_thread);
1422 // Check if there are more than one Java frame in this thread, that the top two frames
1423 // are Java (not native) frames, and that there is no intervening VM frame
1424 int frame_count = 0;
1425 bool is_interpreted[2];
1426 intptr_t *frame_sp[2];
1427 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1428 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1429 methodHandle mh(current_thread, vfs.method());
1430 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1431 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1432 frame_sp[frame_count] = vfs.frame_id();
1433 if (++frame_count > 1) break;
1434 }
1435 if (frame_count < 2) {
1436 // We haven't found two adjacent non-native Java frames on the top.
1437 // There can be two situations here:
1438 // 1. There are no more java frames
1439 // 2. Two top java frames are separated by non-java native frames
1440 if(vframeFor(java_thread, 1) == NULL) {
1441 return JVMTI_ERROR_NO_MORE_FRAMES;
1442 } else {
1443 // Intervening non-java native or VM frames separate java frames.
1444 // Current implementation does not support this. See bug #5031735.
1445 // In theory it is possible to pop frames in such cases.
1446 return JVMTI_ERROR_OPAQUE_FRAME;
1447 }
1448 }
1449
1450 // If any of the top 2 frames is a compiled one, need to deoptimize it
1451 for (int i = 0; i < 2; i++) {
1452 if (!is_interpreted[i]) {
1453 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1454 }
1455 }
1456
1457 // Update the thread state to reflect that the top frame is popped
1458 // so that cur_stack_depth is maintained properly and all frameIDs
1459 // are invalidated.
1460 // The current frame will be popped later when the suspended thread
1461 // is resumed and right before returning from VM to Java.
1462 // (see call_VM_base() in assembler_<cpu>.cpp).
1463
1464 // It's fine to update the thread state here because no JVMTI events
1465 // shall be posted for this PopFrame.
1466
1467 state->update_for_pop_top_frame();
1468 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1469 // Set pending step flag for this popframe and it is cleared when next
1470 // step event is posted.
1471 state->set_pending_step_for_popframe();
1472 }
1473
1474 return JVMTI_ERROR_NONE;
1475 } /* end PopFrame */
1476
1477
1478 // Threads_lock NOT held, java_thread not protected by lock
1479 // java_thread - pre-checked
1480 // java_thread - unchecked
1481 // depth - pre-checked as non-negative
1482 // method_ptr - pre-checked for NULL
1483 // location_ptr - pre-checked for NULL
1484 jvmtiError
1485 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1486 jvmtiError err = JVMTI_ERROR_NONE;
1487
1488 // It is only safe to perform the direct operation on the current
1489 // thread. All other usage needs to use a vm-safepoint-op for safety.
1490 if (java_thread == JavaThread::current()) {
1491 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1492 } else {
1493 // JVMTI get java stack frame location at safepoint.
1494 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1495 VMThread::execute(&op);
1496 err = op.result();
1497 }
1498 return err;
1499 } /* end GetFrameLocation */
1500
1501
1502 // Threads_lock NOT held, java_thread not protected by lock
1503 // java_thread - pre-checked
1504 // java_thread - unchecked
1505 // depth - pre-checked as non-negative
1506 jvmtiError
1507 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1508 ResourceMark rm;
1509 uint32_t debug_bits = 0;
1510
1511 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1512 if (state == NULL) {
1513 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1514 }
1515
1516 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1517 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1518 }
1519
1520 if (TraceJVMTICalls) {
1521 JvmtiSuspendControl::print();
1522 }
1523
1524 vframe *vf = vframeFor(java_thread, depth);
1525 if (vf == NULL) {
1526 return JVMTI_ERROR_NO_MORE_FRAMES;
1527 }
1528
1529 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1530 return JVMTI_ERROR_OPAQUE_FRAME;
1531 }
1532
1533 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1534
1535 int frame_number = state->count_frames() - depth;
1536 state->env_thread_state(this)->set_frame_pop(frame_number);
1537
1538 return JVMTI_ERROR_NONE;
1539 } /* end NotifyFramePop */
1540
1541
1542 //
1543 // Force Early Return functions
1544 //
1545
1546 // Threads_lock NOT held, java_thread not protected by lock
1547 // java_thread - pre-checked
1548 jvmtiError
1549 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1550 jvalue val;
1551 val.l = value;
1552 return force_early_return(java_thread, val, atos);
1553 } /* end ForceEarlyReturnObject */
1554
1555
1556 // Threads_lock NOT held, java_thread not protected by lock
1557 // java_thread - pre-checked
1558 jvmtiError
1559 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1560 jvalue val;
1561 val.i = value;
1562 return force_early_return(java_thread, val, itos);
1563 } /* end ForceEarlyReturnInt */
1564
1565
1566 // Threads_lock NOT held, java_thread not protected by lock
1567 // java_thread - pre-checked
1568 jvmtiError
1569 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1570 jvalue val;
1571 val.j = value;
1572 return force_early_return(java_thread, val, ltos);
1573 } /* end ForceEarlyReturnLong */
1574
1575
1576 // Threads_lock NOT held, java_thread not protected by lock
1577 // java_thread - pre-checked
1578 jvmtiError
1579 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1580 jvalue val;
1581 val.f = value;
1582 return force_early_return(java_thread, val, ftos);
1583 } /* end ForceEarlyReturnFloat */
1584
1585
1586 // Threads_lock NOT held, java_thread not protected by lock
1587 // java_thread - pre-checked
1588 jvmtiError
1589 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1590 jvalue val;
1591 val.d = value;
1592 return force_early_return(java_thread, val, dtos);
1593 } /* end ForceEarlyReturnDouble */
1594
1595
1596 // Threads_lock NOT held, java_thread not protected by lock
1597 // java_thread - pre-checked
1598 jvmtiError
1599 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1600 jvalue val;
1601 val.j = 0L;
1602 return force_early_return(java_thread, val, vtos);
1603 } /* end ForceEarlyReturnVoid */
1604
1605
1606 //
1607 // Heap functions
1608 //
1609
1610 // klass - NULL is a valid value, must be checked
1611 // initial_object - NULL is a valid value, must be checked
1612 // callbacks - pre-checked for NULL
1613 // user_data - NULL is a valid value, must be checked
1614 jvmtiError
1615 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1616 // check klass if provided
1617 Klass* k_oop = NULL;
1618 if (klass != NULL) {
1619 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1620 if (k_mirror == NULL) {
1621 return JVMTI_ERROR_INVALID_CLASS;
1622 }
1623 if (java_lang_Class::is_primitive(k_mirror)) {
1624 return JVMTI_ERROR_NONE;
1625 }
1626 k_oop = java_lang_Class::as_Klass(k_mirror);
1627 if (k_oop == NULL) {
1628 return JVMTI_ERROR_INVALID_CLASS;
1629 }
1630 }
1631
1632 Thread *thread = Thread::current();
1633 HandleMark hm(thread);
1634 KlassHandle kh (thread, k_oop);
1635
1636 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1637 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1638 return JVMTI_ERROR_NONE;
1639 } /* end FollowReferences */
1640
1641
1642 // klass - NULL is a valid value, must be checked
1643 // callbacks - pre-checked for NULL
1644 // user_data - NULL is a valid value, must be checked
1645 jvmtiError
1646 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1647 // check klass if provided
1648 Klass* k_oop = NULL;
1649 if (klass != NULL) {
1650 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1651 if (k_mirror == NULL) {
1652 return JVMTI_ERROR_INVALID_CLASS;
1653 }
1654 if (java_lang_Class::is_primitive(k_mirror)) {
1655 return JVMTI_ERROR_NONE;
1656 }
1657 k_oop = java_lang_Class::as_Klass(k_mirror);
1658 if (k_oop == NULL) {
1659 return JVMTI_ERROR_INVALID_CLASS;
1660 }
1661 }
1662
1663 Thread *thread = Thread::current();
1664 HandleMark hm(thread);
1665 KlassHandle kh (thread, k_oop);
1666
1667 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1668 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1669 return JVMTI_ERROR_NONE;
1670 } /* end IterateThroughHeap */
1671
1672
1673 // tag_ptr - pre-checked for NULL
1674 jvmtiError
1675 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1676 oop o = JNIHandles::resolve_external_guard(object);
1677 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1678 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1679 return JVMTI_ERROR_NONE;
1680 } /* end GetTag */
1681
1682
1683 jvmtiError
1684 JvmtiEnv::SetTag(jobject object, jlong tag) {
1685 oop o = JNIHandles::resolve_external_guard(object);
1686 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1687 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1688 return JVMTI_ERROR_NONE;
1689 } /* end SetTag */
1690
1691
1692 // tag_count - pre-checked to be greater than or equal to 0
1693 // tags - pre-checked for NULL
1694 // count_ptr - pre-checked for NULL
1695 // object_result_ptr - NULL is a valid value, must be checked
1696 // tag_result_ptr - NULL is a valid value, must be checked
1697 jvmtiError
1698 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1699 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1700 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1701 } /* end GetObjectsWithTags */
1702
1703
1704 jvmtiError
1705 JvmtiEnv::ForceGarbageCollection() {
1706 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1707 return JVMTI_ERROR_NONE;
1708 } /* end ForceGarbageCollection */
1709
1710
1711 //
1712 // Heap (1.0) functions
1713 //
1714
1715 // object_reference_callback - pre-checked for NULL
1716 // user_data - NULL is a valid value, must be checked
1717 jvmtiError
1718 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1719 oop o = JNIHandles::resolve_external_guard(object);
1720 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1721 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1722 return JVMTI_ERROR_NONE;
1723 } /* end IterateOverObjectsReachableFromObject */
1724
1725
1726 // heap_root_callback - NULL is a valid value, must be checked
1727 // stack_ref_callback - NULL is a valid value, must be checked
1728 // object_ref_callback - NULL is a valid value, must be checked
1729 // user_data - NULL is a valid value, must be checked
1730 jvmtiError
1731 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1732 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1733 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1734 return JVMTI_ERROR_NONE;
1735 } /* end IterateOverReachableObjects */
1736
1737
1738 // heap_object_callback - pre-checked for NULL
1739 // user_data - NULL is a valid value, must be checked
1740 jvmtiError
1741 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1742 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1743 Thread *thread = Thread::current();
1744 HandleMark hm(thread);
1745 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1746 return JVMTI_ERROR_NONE;
1747 } /* end IterateOverHeap */
1748
1749
1750 // k_mirror - may be primitive, this must be checked
1751 // heap_object_callback - pre-checked for NULL
1752 // user_data - NULL is a valid value, must be checked
1753 jvmtiError
1754 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1755 if (java_lang_Class::is_primitive(k_mirror)) {
1756 // DO PRIMITIVE CLASS PROCESSING
1757 return JVMTI_ERROR_NONE;
1758 }
1759 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1760 if (k_oop == NULL) {
1761 return JVMTI_ERROR_INVALID_CLASS;
1762 }
1763 Thread *thread = Thread::current();
1764 HandleMark hm(thread);
1765 KlassHandle klass (thread, k_oop);
1766 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1767 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1768 return JVMTI_ERROR_NONE;
1769 } /* end IterateOverInstancesOfClass */
1770
1771
1772 //
1773 // Local Variable functions
1774 //
1775
1776 // Threads_lock NOT held, java_thread not protected by lock
1777 // java_thread - pre-checked
1778 // java_thread - unchecked
1779 // depth - pre-checked as non-negative
1780 // value_ptr - pre-checked for NULL
1781 jvmtiError
1782 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1783 JavaThread* current_thread = JavaThread::current();
1784 // rm object is created to clean up the javaVFrame created in
1785 // doit_prologue(), but after doit() is finished with it.
1786 ResourceMark rm(current_thread);
1787
1788 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1789 VMThread::execute(&op);
1790 jvmtiError err = op.result();
1791 if (err != JVMTI_ERROR_NONE) {
1792 return err;
1793 } else {
1794 *value_ptr = op.value().l;
1795 return JVMTI_ERROR_NONE;
1796 }
1797 } /* end GetLocalObject */
1798
1799 // Threads_lock NOT held, java_thread not protected by lock
1800 // java_thread - pre-checked
1801 // java_thread - unchecked
1802 // depth - pre-checked as non-negative
1803 // value - pre-checked for NULL
1804 jvmtiError
1805 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1806 JavaThread* current_thread = JavaThread::current();
1807 // rm object is created to clean up the javaVFrame created in
1808 // doit_prologue(), but after doit() is finished with it.
1809 ResourceMark rm(current_thread);
1810
1811 VM_GetReceiver op(java_thread, current_thread, depth);
1812 VMThread::execute(&op);
1813 jvmtiError err = op.result();
1814 if (err != JVMTI_ERROR_NONE) {
1815 return err;
1816 } else {
1817 *value_ptr = op.value().l;
1818 return JVMTI_ERROR_NONE;
1819 }
1820 } /* end GetLocalInstance */
1821
1822
1823 // Threads_lock NOT held, java_thread not protected by lock
1824 // java_thread - pre-checked
1825 // java_thread - unchecked
1826 // depth - pre-checked as non-negative
1827 // value_ptr - pre-checked for NULL
1828 jvmtiError
1829 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1830 // rm object is created to clean up the javaVFrame created in
1831 // doit_prologue(), but after doit() is finished with it.
1832 ResourceMark rm;
1833
1834 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1835 VMThread::execute(&op);
1836 *value_ptr = op.value().i;
1837 return op.result();
1838 } /* end GetLocalInt */
1839
1840
1841 // Threads_lock NOT held, java_thread not protected by lock
1842 // java_thread - pre-checked
1843 // java_thread - unchecked
1844 // depth - pre-checked as non-negative
1845 // value_ptr - pre-checked for NULL
1846 jvmtiError
1847 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1848 // rm object is created to clean up the javaVFrame created in
1849 // doit_prologue(), but after doit() is finished with it.
1850 ResourceMark rm;
1851
1852 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1853 VMThread::execute(&op);
1854 *value_ptr = op.value().j;
1855 return op.result();
1856 } /* end GetLocalLong */
1857
1858
1859 // Threads_lock NOT held, java_thread not protected by lock
1860 // java_thread - pre-checked
1861 // java_thread - unchecked
1862 // depth - pre-checked as non-negative
1863 // value_ptr - pre-checked for NULL
1864 jvmtiError
1865 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1866 // rm object is created to clean up the javaVFrame created in
1867 // doit_prologue(), but after doit() is finished with it.
1868 ResourceMark rm;
1869
1870 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1871 VMThread::execute(&op);
1872 *value_ptr = op.value().f;
1873 return op.result();
1874 } /* end GetLocalFloat */
1875
1876
1877 // Threads_lock NOT held, java_thread not protected by lock
1878 // java_thread - pre-checked
1879 // java_thread - unchecked
1880 // depth - pre-checked as non-negative
1881 // value_ptr - pre-checked for NULL
1882 jvmtiError
1883 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1884 // rm object is created to clean up the javaVFrame created in
1885 // doit_prologue(), but after doit() is finished with it.
1886 ResourceMark rm;
1887
1888 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1889 VMThread::execute(&op);
1890 *value_ptr = op.value().d;
1891 return op.result();
1892 } /* end GetLocalDouble */
1893
1894
1895 // Threads_lock NOT held, java_thread not protected by lock
1896 // java_thread - pre-checked
1897 // java_thread - unchecked
1898 // depth - pre-checked as non-negative
1899 jvmtiError
1900 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1901 // rm object is created to clean up the javaVFrame created in
1902 // doit_prologue(), but after doit() is finished with it.
1903 ResourceMark rm;
1904 jvalue val;
1905 val.l = value;
1906 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1907 VMThread::execute(&op);
1908 return op.result();
1909 } /* end SetLocalObject */
1910
1911
1912 // Threads_lock NOT held, java_thread not protected by lock
1913 // java_thread - pre-checked
1914 // java_thread - unchecked
1915 // depth - pre-checked as non-negative
1916 jvmtiError
1917 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1918 // rm object is created to clean up the javaVFrame created in
1919 // doit_prologue(), but after doit() is finished with it.
1920 ResourceMark rm;
1921 jvalue val;
1922 val.i = value;
1923 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1924 VMThread::execute(&op);
1925 return op.result();
1926 } /* end SetLocalInt */
1927
1928
1929 // Threads_lock NOT held, java_thread not protected by lock
1930 // java_thread - pre-checked
1931 // java_thread - unchecked
1932 // depth - pre-checked as non-negative
1933 jvmtiError
1934 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1935 // rm object is created to clean up the javaVFrame created in
1936 // doit_prologue(), but after doit() is finished with it.
1937 ResourceMark rm;
1938 jvalue val;
1939 val.j = value;
1940 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1941 VMThread::execute(&op);
1942 return op.result();
1943 } /* end SetLocalLong */
1944
1945
1946 // Threads_lock NOT held, java_thread not protected by lock
1947 // java_thread - pre-checked
1948 // java_thread - unchecked
1949 // depth - pre-checked as non-negative
1950 jvmtiError
1951 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1952 // rm object is created to clean up the javaVFrame created in
1953 // doit_prologue(), but after doit() is finished with it.
1954 ResourceMark rm;
1955 jvalue val;
1956 val.f = value;
1957 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1958 VMThread::execute(&op);
1959 return op.result();
1960 } /* end SetLocalFloat */
1961
1962
1963 // Threads_lock NOT held, java_thread not protected by lock
1964 // java_thread - pre-checked
1965 // java_thread - unchecked
1966 // depth - pre-checked as non-negative
1967 jvmtiError
1968 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1969 // rm object is created to clean up the javaVFrame created in
1970 // doit_prologue(), but after doit() is finished with it.
1971 ResourceMark rm;
1972 jvalue val;
1973 val.d = value;
1974 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
1975 VMThread::execute(&op);
1976 return op.result();
1977 } /* end SetLocalDouble */
1978
1979
1980 //
1981 // Breakpoint functions
1982 //
1983
1984 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
1985 jvmtiError
1986 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
1987 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
1988 if (location < 0) { // simple invalid location check first
1989 return JVMTI_ERROR_INVALID_LOCATION;
1990 }
1991 // verify that the breakpoint is not past the end of the method
1992 if (location >= (jlocation) method_oop->code_size()) {
1993 return JVMTI_ERROR_INVALID_LOCATION;
1994 }
1995
1996 ResourceMark rm;
1997 JvmtiBreakpoint bp(method_oop, location);
1998 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
1999 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2000 return JVMTI_ERROR_DUPLICATE;
2001
2002 if (TraceJVMTICalls) {
2003 jvmti_breakpoints.print();
2004 }
2005
2006 return JVMTI_ERROR_NONE;
2007 } /* end SetBreakpoint */
2008
2009
2010 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2011 jvmtiError
2012 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2013 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2014
2015 if (location < 0) { // simple invalid location check first
2016 return JVMTI_ERROR_INVALID_LOCATION;
2017 }
2018
2019 // verify that the breakpoint is not past the end of the method
2020 if (location >= (jlocation) method_oop->code_size()) {
2021 return JVMTI_ERROR_INVALID_LOCATION;
2022 }
2023
2024 JvmtiBreakpoint bp(method_oop, location);
2025
2026 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2027 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2028 return JVMTI_ERROR_NOT_FOUND;
2029
2030 if (TraceJVMTICalls) {
2031 jvmti_breakpoints.print();
2032 }
2033
2034 return JVMTI_ERROR_NONE;
2035 } /* end ClearBreakpoint */
2036
2037
2038 //
2039 // Watched Field functions
2040 //
2041
2042 jvmtiError
2043 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2044 // make sure we haven't set this watch before
2045 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2046 fdesc_ptr->set_is_field_access_watched(true);
2047
2048 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2049
2050 return JVMTI_ERROR_NONE;
2051 } /* end SetFieldAccessWatch */
2052
2053
2054 jvmtiError
2055 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2056 // make sure we have a watch to clear
2057 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2058 fdesc_ptr->set_is_field_access_watched(false);
2059
2060 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2061
2062 return JVMTI_ERROR_NONE;
2063 } /* end ClearFieldAccessWatch */
2064
2065
2066 jvmtiError
2067 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2068 // make sure we haven't set this watch before
2069 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2070 fdesc_ptr->set_is_field_modification_watched(true);
2071
2072 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2073
2074 return JVMTI_ERROR_NONE;
2075 } /* end SetFieldModificationWatch */
2076
2077
2078 jvmtiError
2079 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2080 // make sure we have a watch to clear
2081 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2082 fdesc_ptr->set_is_field_modification_watched(false);
2083
2084 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2085
2086 return JVMTI_ERROR_NONE;
2087 } /* end ClearFieldModificationWatch */
2088
2089 //
2090 // Class functions
2091 //
2092
2093
2094 // k_mirror - may be primitive, this must be checked
2095 // signature_ptr - NULL is a valid value, must be checked
2096 // generic_ptr - NULL is a valid value, must be checked
2097 jvmtiError
2098 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2099 ResourceMark rm;
2100 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2101 Klass* k = NULL;
2102 if (!isPrimitive) {
2103 k = java_lang_Class::as_Klass(k_mirror);
2104 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2105 }
2106 if (signature_ptr != NULL) {
2107 char* result = NULL;
2108 if (isPrimitive) {
2109 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2110 result = (char*) jvmtiMalloc(2);
2111 result[0] = tchar;
2112 result[1] = '\0';
2113 } else {
2114 const char* class_sig = k->signature_name();
2115 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2116 strcpy(result, class_sig);
2117 }
2118 *signature_ptr = result;
2119 }
2120 if (generic_ptr != NULL) {
2121 *generic_ptr = NULL;
2122 if (!isPrimitive && k->oop_is_instance()) {
2123 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2124 if (soo != NULL) {
2125 const char *gen_sig = soo->as_C_string();
2126 if (gen_sig != NULL) {
2127 char* gen_result;
2128 jvmtiError err = allocate(strlen(gen_sig) + 1,
2129 (unsigned char **)&gen_result);
2130 if (err != JVMTI_ERROR_NONE) {
2131 return err;
2132 }
2133 strcpy(gen_result, gen_sig);
2134 *generic_ptr = gen_result;
2135 }
2136 }
2137 }
2138 }
2139 return JVMTI_ERROR_NONE;
2140 } /* end GetClassSignature */
2141
2142
2143 // k_mirror - may be primitive, this must be checked
2144 // status_ptr - pre-checked for NULL
2145 jvmtiError
2146 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2147 jint result = 0;
2148 if (java_lang_Class::is_primitive(k_mirror)) {
2149 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2150 } else {
2151 Klass* k = java_lang_Class::as_Klass(k_mirror);
2152 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2153 result = k->jvmti_class_status();
2154 }
2155 *status_ptr = result;
2156
2157 return JVMTI_ERROR_NONE;
2158 } /* end GetClassStatus */
2159
2160
2161 // k_mirror - may be primitive, this must be checked
2162 // source_name_ptr - pre-checked for NULL
2163 jvmtiError
2164 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2165 if (java_lang_Class::is_primitive(k_mirror)) {
2166 return JVMTI_ERROR_ABSENT_INFORMATION;
2167 }
2168 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2169 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2170
2171 if (!k_klass->oop_is_instance()) {
2172 return JVMTI_ERROR_ABSENT_INFORMATION;
2173 }
2174
2175 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2176 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2177 {
2178 JavaThread* current_thread = JavaThread::current();
2179 ResourceMark rm(current_thread);
2180 const char* sfncp = (const char*) sfnOop->as_C_string();
2181 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2182 strcpy(*source_name_ptr, sfncp);
2183 }
2184
2185 return JVMTI_ERROR_NONE;
2186 } /* end GetSourceFileName */
2187
2188
2189 // k_mirror - may be primitive, this must be checked
2190 // modifiers_ptr - pre-checked for NULL
2191 jvmtiError
2192 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2193 JavaThread* current_thread = JavaThread::current();
2194 jint result = 0;
2195 if (!java_lang_Class::is_primitive(k_mirror)) {
2196 Klass* k = java_lang_Class::as_Klass(k_mirror);
2197 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2198 result = k->compute_modifier_flags(current_thread);
2199 JavaThread* THREAD = current_thread; // pass to macros
2200 if (HAS_PENDING_EXCEPTION) {
2201 CLEAR_PENDING_EXCEPTION;
2202 return JVMTI_ERROR_INTERNAL;
2203 };
2204
2205 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2206 if(k->is_super()) {
2207 result |= JVM_ACC_SUPER;
2208 }
2209 } else {
2210 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2211 }
2212 *modifiers_ptr = result;
2213
2214 return JVMTI_ERROR_NONE;
2215 } /* end GetClassModifiers */
2216
2217
2218 // k_mirror - may be primitive, this must be checked
2219 // method_count_ptr - pre-checked for NULL
2220 // methods_ptr - pre-checked for NULL
2221 jvmtiError
2222 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2223 JavaThread* current_thread = JavaThread::current();
2224 HandleMark hm(current_thread);
2225
2226 if (java_lang_Class::is_primitive(k_mirror)) {
2227 *method_count_ptr = 0;
2228 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2229 return JVMTI_ERROR_NONE;
2230 }
2231 Klass* k = java_lang_Class::as_Klass(k_mirror);
2232 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2233
2234 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2235 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2236 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2237 }
2238
2239 if (!k->oop_is_instance()) {
2240 *method_count_ptr = 0;
2241 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2242 return JVMTI_ERROR_NONE;
2243 }
2244 instanceKlassHandle instanceK_h(current_thread, k);
2245 // Allocate the result and fill it in
2246 int result_length = instanceK_h->methods()->length();
2247 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2248 int index;
2249 if (JvmtiExport::can_maintain_original_method_order()) {
2250 // Use the original method ordering indices stored in the class, so we can emit
2251 // jmethodIDs in the order they appeared in the class file
2252 for (index = 0; index < result_length; index++) {
2253 Method* m = instanceK_h->methods()->at(index);
2254 int original_index = instanceK_h->method_ordering()->at(index);
2255 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2256 jmethodID id = m->jmethod_id();
2257 result_list[original_index] = id;
2258 }
2259 } else {
2260 // otherwise just copy in any order
2261 for (index = 0; index < result_length; index++) {
2262 Method* m = instanceK_h->methods()->at(index);
2263 jmethodID id = m->jmethod_id();
2264 result_list[index] = id;
2265 }
2266 }
2267 // Fill in return value.
2268 *method_count_ptr = result_length;
2269 *methods_ptr = result_list;
2270
2271 return JVMTI_ERROR_NONE;
2272 } /* end GetClassMethods */
2273
2274
2275 // k_mirror - may be primitive, this must be checked
2276 // field_count_ptr - pre-checked for NULL
2277 // fields_ptr - pre-checked for NULL
2278 jvmtiError
2279 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2280 if (java_lang_Class::is_primitive(k_mirror)) {
2281 *field_count_ptr = 0;
2282 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2283 return JVMTI_ERROR_NONE;
2284 }
2285 JavaThread* current_thread = JavaThread::current();
2286 HandleMark hm(current_thread);
2287 Klass* k = java_lang_Class::as_Klass(k_mirror);
2288 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2289
2290 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2291 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2292 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2293 }
2294
2295 if (!k->oop_is_instance()) {
2296 *field_count_ptr = 0;
2297 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2298 return JVMTI_ERROR_NONE;
2299 }
2300
2301
2302 instanceKlassHandle instanceK_h(current_thread, k);
2303
2304 int result_count = 0;
2305 // First, count the fields.
2306 FilteredFieldStream flds(instanceK_h, true, true);
2307 result_count = flds.field_count();
2308
2309 // Allocate the result and fill it in
2310 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2311 // The JVMTI spec requires fields in the order they occur in the class file,
2312 // this is the reverse order of what FieldStream hands out.
2313 int id_index = (result_count - 1);
2314
2315 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2316 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2317 instanceK_h, src_st.offset(),
2318 src_st.access_flags().is_static());
2319 }
2320 assert(id_index == -1, "just checking");
2321 // Fill in the results
2322 *field_count_ptr = result_count;
2323 *fields_ptr = result_list;
2324
2325 return JVMTI_ERROR_NONE;
2326 } /* end GetClassFields */
2327
2328
2329 // k_mirror - may be primitive, this must be checked
2330 // interface_count_ptr - pre-checked for NULL
2331 // interfaces_ptr - pre-checked for NULL
2332 jvmtiError
2333 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2334 {
2335 if (java_lang_Class::is_primitive(k_mirror)) {
2336 *interface_count_ptr = 0;
2337 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2338 return JVMTI_ERROR_NONE;
2339 }
2340 JavaThread* current_thread = JavaThread::current();
2341 HandleMark hm(current_thread);
2342 Klass* k = java_lang_Class::as_Klass(k_mirror);
2343 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2344
2345 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2346 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2347 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2348
2349 if (!k->oop_is_instance()) {
2350 *interface_count_ptr = 0;
2351 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2352 return JVMTI_ERROR_NONE;
2353 }
2354
2355 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2356 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2357 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2358 for (int i_index = 0; i_index < result_length; i_index += 1) {
2359 Klass* klass_at = interface_list->at(i_index);
2360 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2361 assert(klass_at->is_interface(), "interfaces must be interfaces");
2362 oop mirror_at = klass_at->java_mirror();
2363 Handle handle_at = Handle(current_thread, mirror_at);
2364 result_list[i_index] = (jclass) jni_reference(handle_at);
2365 }
2366 *interface_count_ptr = result_length;
2367 *interfaces_ptr = result_list;
2368 }
2369
2370 return JVMTI_ERROR_NONE;
2371 } /* end GetImplementedInterfaces */
2372
2373
2374 // k_mirror - may be primitive, this must be checked
2375 // minor_version_ptr - pre-checked for NULL
2376 // major_version_ptr - pre-checked for NULL
2377 jvmtiError
2378 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2379 if (java_lang_Class::is_primitive(k_mirror)) {
2380 return JVMTI_ERROR_ABSENT_INFORMATION;
2381 }
2382 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2383 Thread *thread = Thread::current();
2384 HandleMark hm(thread);
2385 KlassHandle klass(thread, k_oop);
2386
2387 jint status = klass->jvmti_class_status();
2388 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2389 return JVMTI_ERROR_INVALID_CLASS;
2390 }
2391 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2392 return JVMTI_ERROR_ABSENT_INFORMATION;
2393 }
2394
2395 instanceKlassHandle ik(thread, k_oop);
2396 *minor_version_ptr = ik->minor_version();
2397 *major_version_ptr = ik->major_version();
2398
2399 return JVMTI_ERROR_NONE;
2400 } /* end GetClassVersionNumbers */
2401
2402
2403 // k_mirror - may be primitive, this must be checked
2404 // constant_pool_count_ptr - pre-checked for NULL
2405 // constant_pool_byte_count_ptr - pre-checked for NULL
2406 // constant_pool_bytes_ptr - pre-checked for NULL
2407 jvmtiError
2408 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2409 if (java_lang_Class::is_primitive(k_mirror)) {
2410 return JVMTI_ERROR_ABSENT_INFORMATION;
2411 }
2412
2413 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2414 Thread *thread = Thread::current();
2415 HandleMark hm(thread);
2416 ResourceMark rm(thread);
2417 KlassHandle klass(thread, k_oop);
2418
2419 jint status = klass->jvmti_class_status();
2420 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2421 return JVMTI_ERROR_INVALID_CLASS;
2422 }
2423 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2424 return JVMTI_ERROR_ABSENT_INFORMATION;
2425 }
2426
2427 instanceKlassHandle ikh(thread, k_oop);
2428 constantPoolHandle constants(thread, ikh->constants());
2429 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
2430
2431 JvmtiConstantPoolReconstituter reconstituter(ikh);
2432 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2433 return reconstituter.get_error();
2434 }
2435
2436 unsigned char *cpool_bytes;
2437 int cpool_size = reconstituter.cpool_size();
2438 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2439 return reconstituter.get_error();
2440 }
2441 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2442 if (res != JVMTI_ERROR_NONE) {
2443 return res;
2444 }
2445 reconstituter.copy_cpool_bytes(cpool_bytes);
2446 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2447 return reconstituter.get_error();
2448 }
2449
2450 *constant_pool_count_ptr = constants->length();
2451 *constant_pool_byte_count_ptr = cpool_size;
2452 *constant_pool_bytes_ptr = cpool_bytes;
2453
2454 return JVMTI_ERROR_NONE;
2455 } /* end GetConstantPool */
2456
2457
2458 // k_mirror - may be primitive, this must be checked
2459 // is_interface_ptr - pre-checked for NULL
2460 jvmtiError
2461 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2462 {
2463 bool result = false;
2464 if (!java_lang_Class::is_primitive(k_mirror)) {
2465 Klass* k = java_lang_Class::as_Klass(k_mirror);
2466 if (k != NULL && k->is_interface()) {
2467 result = true;
2468 }
2469 }
2470 *is_interface_ptr = result;
2471 }
2472
2473 return JVMTI_ERROR_NONE;
2474 } /* end IsInterface */
2475
2476
2477 // k_mirror - may be primitive, this must be checked
2478 // is_array_class_ptr - pre-checked for NULL
2479 jvmtiError
2480 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2481 {
2482 bool result = false;
2483 if (!java_lang_Class::is_primitive(k_mirror)) {
2484 Klass* k = java_lang_Class::as_Klass(k_mirror);
2485 if (k != NULL && k->oop_is_array()) {
2486 result = true;
2487 }
2488 }
2489 *is_array_class_ptr = result;
2490 }
2491
2492 return JVMTI_ERROR_NONE;
2493 } /* end IsArrayClass */
2494
2495
2496 // k_mirror - may be primitive, this must be checked
2497 // classloader_ptr - pre-checked for NULL
2498 jvmtiError
2499 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2500 {
2501 if (java_lang_Class::is_primitive(k_mirror)) {
2502 *classloader_ptr = (jclass) jni_reference(Handle());
2503 return JVMTI_ERROR_NONE;
2504 }
2505 JavaThread* current_thread = JavaThread::current();
2506 HandleMark hm(current_thread);
2507 Klass* k = java_lang_Class::as_Klass(k_mirror);
2508 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2509
2510 oop result_oop = k->class_loader();
2511 if (result_oop == NULL) {
2512 *classloader_ptr = (jclass) jni_reference(Handle());
2513 return JVMTI_ERROR_NONE;
2514 }
2515 Handle result_handle = Handle(current_thread, result_oop);
2516 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2517 *classloader_ptr = result_jnihandle;
2518 }
2519 return JVMTI_ERROR_NONE;
2520 } /* end GetClassLoader */
2521
2522
2523 // k_mirror - may be primitive, this must be checked
2524 // source_debug_extension_ptr - pre-checked for NULL
2525 jvmtiError
2526 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2527 {
2528 if (java_lang_Class::is_primitive(k_mirror)) {
2529 return JVMTI_ERROR_ABSENT_INFORMATION;
2530 }
2531 Klass* k = java_lang_Class::as_Klass(k_mirror);
2532 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2533 if (!k->oop_is_instance()) {
2534 return JVMTI_ERROR_ABSENT_INFORMATION;
2535 }
2536 char* sde = InstanceKlass::cast(k)->source_debug_extension();
2537 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2538
2539 {
2540 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2541 strcpy(*source_debug_extension_ptr, sde);
2542 }
2543 }
2544
2545 return JVMTI_ERROR_NONE;
2546 } /* end GetSourceDebugExtension */
2547
2548 //
2549 // Object functions
2550 //
2551
2552 // hash_code_ptr - pre-checked for NULL
2553 jvmtiError
2554 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2555 oop mirror = JNIHandles::resolve_external_guard(object);
2556 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2557 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2558
2559 {
2560 jint result = (jint) mirror->identity_hash();
2561 *hash_code_ptr = result;
2562 }
2563 return JVMTI_ERROR_NONE;
2564 } /* end GetObjectHashCode */
2565
2566
2567 // info_ptr - pre-checked for NULL
2568 jvmtiError
2569 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2570 JavaThread* calling_thread = JavaThread::current();
2571 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2572 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2573 // Some of the critical threads were not suspended. go to a safepoint and try again
2574 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2575 VMThread::execute(&op);
2576 err = op.result();
2577 }
2578 return err;
2579 } /* end GetObjectMonitorUsage */
2580
2581
2582 //
2583 // Field functions
2584 //
2585
2586 // name_ptr - NULL is a valid value, must be checked
2587 // signature_ptr - NULL is a valid value, must be checked
2588 // generic_ptr - NULL is a valid value, must be checked
2589 jvmtiError
2590 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2591 JavaThread* current_thread = JavaThread::current();
2592 ResourceMark rm(current_thread);
2593 if (name_ptr == NULL) {
2594 // just don't return the name
2595 } else {
2596 const char* fieldName = fdesc_ptr->name()->as_C_string();
2597 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2598 if (*name_ptr == NULL)
2599 return JVMTI_ERROR_OUT_OF_MEMORY;
2600 strcpy(*name_ptr, fieldName);
2601 }
2602 if (signature_ptr== NULL) {
2603 // just don't return the signature
2604 } else {
2605 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2606 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2607 if (*signature_ptr == NULL)
2608 return JVMTI_ERROR_OUT_OF_MEMORY;
2609 strcpy(*signature_ptr, fieldSignature);
2610 }
2611 if (generic_ptr != NULL) {
2612 *generic_ptr = NULL;
2613 Symbol* soop = fdesc_ptr->generic_signature();
2614 if (soop != NULL) {
2615 const char* gen_sig = soop->as_C_string();
2616 if (gen_sig != NULL) {
2617 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2618 if (err != JVMTI_ERROR_NONE) {
2619 return err;
2620 }
2621 strcpy(*generic_ptr, gen_sig);
2622 }
2623 }
2624 }
2625 return JVMTI_ERROR_NONE;
2626 } /* end GetFieldName */
2627
2628
2629 // declaring_class_ptr - pre-checked for NULL
2630 jvmtiError
2631 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2632
2633 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2634 return JVMTI_ERROR_NONE;
2635 } /* end GetFieldDeclaringClass */
2636
2637
2638 // modifiers_ptr - pre-checked for NULL
2639 jvmtiError
2640 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2641
2642 AccessFlags resultFlags = fdesc_ptr->access_flags();
2643 jint result = resultFlags.as_int();
2644 *modifiers_ptr = result;
2645
2646 return JVMTI_ERROR_NONE;
2647 } /* end GetFieldModifiers */
2648
2649
2650 // is_synthetic_ptr - pre-checked for NULL
2651 jvmtiError
2652 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2653 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2654 return JVMTI_ERROR_NONE;
2655 } /* end IsFieldSynthetic */
2656
2657
2658 //
2659 // Method functions
2660 //
2661
2662 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2663 // name_ptr - NULL is a valid value, must be checked
2664 // signature_ptr - NULL is a valid value, must be checked
2665 // generic_ptr - NULL is a valid value, must be checked
2666 jvmtiError
2667 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2668 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2669 JavaThread* current_thread = JavaThread::current();
2670
2671 ResourceMark rm(current_thread); // get the utf8 name and signature
2672 if (name_ptr == NULL) {
2673 // just don't return the name
2674 } else {
2675 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2676 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2677 strcpy(*name_ptr, utf8_name);
2678 }
2679 if (signature_ptr == NULL) {
2680 // just don't return the signature
2681 } else {
2682 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2683 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2684 strcpy(*signature_ptr, utf8_signature);
2685 }
2686
2687 if (generic_ptr != NULL) {
2688 *generic_ptr = NULL;
2689 Symbol* soop = method_oop->generic_signature();
2690 if (soop != NULL) {
2691 const char* gen_sig = soop->as_C_string();
2692 if (gen_sig != NULL) {
2693 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2694 if (err != JVMTI_ERROR_NONE) {
2695 return err;
2696 }
2697 strcpy(*generic_ptr, gen_sig);
2698 }
2699 }
2700 }
2701 return JVMTI_ERROR_NONE;
2702 } /* end GetMethodName */
2703
2704
2705 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2706 // declaring_class_ptr - pre-checked for NULL
2707 jvmtiError
2708 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2709 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2710 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2711 return JVMTI_ERROR_NONE;
2712 } /* end GetMethodDeclaringClass */
2713
2714
2715 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2716 // modifiers_ptr - pre-checked for NULL
2717 jvmtiError
2718 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2719 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2720 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2721 return JVMTI_ERROR_NONE;
2722 } /* end GetMethodModifiers */
2723
2724
2725 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2726 // max_ptr - pre-checked for NULL
2727 jvmtiError
2728 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2729 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2730 // get max stack
2731 (*max_ptr) = method_oop->max_locals();
2732 return JVMTI_ERROR_NONE;
2733 } /* end GetMaxLocals */
2734
2735
2736 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2737 // size_ptr - pre-checked for NULL
2738 jvmtiError
2739 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2740 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2741 // get size of arguments
2742
2743 (*size_ptr) = method_oop->size_of_parameters();
2744 return JVMTI_ERROR_NONE;
2745 } /* end GetArgumentsSize */
2746
2747
2748 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2749 // entry_count_ptr - pre-checked for NULL
2750 // table_ptr - pre-checked for NULL
2751 jvmtiError
2752 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2753 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2754 if (!method_oop->has_linenumber_table()) {
2755 return (JVMTI_ERROR_ABSENT_INFORMATION);
2756 }
2757
2758 // The line number table is compressed so we don't know how big it is until decompressed.
2759 // Decompression is really fast so we just do it twice.
2760
2761 // Compute size of table
2762 jint num_entries = 0;
2763 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2764 while (stream.read_pair()) {
2765 num_entries++;
2766 }
2767 jvmtiLineNumberEntry *jvmti_table =
2768 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2769
2770 // Fill jvmti table
2771 if (num_entries > 0) {
2772 int index = 0;
2773 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2774 while (stream.read_pair()) {
2775 jvmti_table[index].start_location = (jlocation) stream.bci();
2776 jvmti_table[index].line_number = (jint) stream.line();
2777 index++;
2778 }
2779 assert(index == num_entries, "sanity check");
2780 }
2781
2782 // Set up results
2783 (*entry_count_ptr) = num_entries;
2784 (*table_ptr) = jvmti_table;
2785
2786 return JVMTI_ERROR_NONE;
2787 } /* end GetLineNumberTable */
2788
2789
2790 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2791 // start_location_ptr - pre-checked for NULL
2792 // end_location_ptr - pre-checked for NULL
2793 jvmtiError
2794 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2795
2796 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2797 // get start and end location
2798 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2799 if (method_oop->code_size() == 0) {
2800 // there is no code so there is no start location
2801 (*start_location_ptr) = (jlocation)(-1);
2802 } else {
2803 (*start_location_ptr) = (jlocation)(0);
2804 }
2805
2806 return JVMTI_ERROR_NONE;
2807 } /* end GetMethodLocation */
2808
2809
2810 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2811 // entry_count_ptr - pre-checked for NULL
2812 // table_ptr - pre-checked for NULL
2813 jvmtiError
2814 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2815
2816 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2817 JavaThread* current_thread = JavaThread::current();
2818
2819 // does the klass have any local variable information?
2820 InstanceKlass* ik = method_oop->method_holder();
2821 if (!ik->access_flags().has_localvariable_table()) {
2822 return (JVMTI_ERROR_ABSENT_INFORMATION);
2823 }
2824
2825 ConstantPool* constants = method_oop->constants();
2826 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2827
2828 // in the vm localvariable table representation, 6 consecutive elements in the table
2829 // represent a 6-tuple of shorts
2830 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2831 jint num_entries = method_oop->localvariable_table_length();
2832 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2833 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2834
2835 if (num_entries > 0) {
2836 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2837 for (int i = 0; i < num_entries; i++) {
2838 // get the 5 tuple information from the vm table
2839 jlocation start_location = (jlocation) table[i].start_bci;
2840 jint length = (jint) table[i].length;
2841 int name_index = (int) table[i].name_cp_index;
2842 int signature_index = (int) table[i].descriptor_cp_index;
2843 int generic_signature_index = (int) table[i].signature_cp_index;
2844 jint slot = (jint) table[i].slot;
2845
2846 // get utf8 name and signature
2847 char *name_buf = NULL;
2848 char *sig_buf = NULL;
2849 char *gen_sig_buf = NULL;
2850 {
2851 ResourceMark rm(current_thread);
2852
2853 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2854 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2855 strcpy(name_buf, utf8_name);
2856
2857 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2858 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2859 strcpy(sig_buf, utf8_signature);
2860
2861 if (generic_signature_index > 0) {
2862 const char *utf8_gen_sign = (const char *)
2863 constants->symbol_at(generic_signature_index)->as_utf8();
2864 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2865 strcpy(gen_sig_buf, utf8_gen_sign);
2866 }
2867 }
2868
2869 // fill in the jvmti local variable table
2870 jvmti_table[i].start_location = start_location;
2871 jvmti_table[i].length = length;
2872 jvmti_table[i].name = name_buf;
2873 jvmti_table[i].signature = sig_buf;
2874 jvmti_table[i].generic_signature = gen_sig_buf;
2875 jvmti_table[i].slot = slot;
2876 }
2877 }
2878
2879 // set results
2880 (*entry_count_ptr) = num_entries;
2881 (*table_ptr) = jvmti_table;
2882
2883 return JVMTI_ERROR_NONE;
2884 } /* end GetLocalVariableTable */
2885
2886
2887 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2888 // bytecode_count_ptr - pre-checked for NULL
2889 // bytecodes_ptr - pre-checked for NULL
2890 jvmtiError
2891 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2892 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2893
2894 HandleMark hm;
2895 methodHandle method(method_oop);
2896 jint size = (jint)method->code_size();
2897 jvmtiError err = allocate(size, bytecodes_ptr);
2898 if (err != JVMTI_ERROR_NONE) {
2899 return err;
2900 }
2901
2902 (*bytecode_count_ptr) = size;
2903 // get byte codes
2904 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2905
2906 return JVMTI_ERROR_NONE;
2907 } /* end GetBytecodes */
2908
2909
2910 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2911 // is_native_ptr - pre-checked for NULL
2912 jvmtiError
2913 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2914 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2915 (*is_native_ptr) = method_oop->is_native();
2916 return JVMTI_ERROR_NONE;
2917 } /* end IsMethodNative */
2918
2919
2920 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2921 // is_synthetic_ptr - pre-checked for NULL
2922 jvmtiError
2923 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
2924 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2925 (*is_synthetic_ptr) = method_oop->is_synthetic();
2926 return JVMTI_ERROR_NONE;
2927 } /* end IsMethodSynthetic */
2928
2929
2930 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2931 // is_obsolete_ptr - pre-checked for NULL
2932 jvmtiError
2933 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
2934 if (use_version_1_0_semantics() &&
2935 get_capabilities()->can_redefine_classes == 0) {
2936 // This JvmtiEnv requested version 1.0 semantics and this function
2937 // requires the can_redefine_classes capability in version 1.0 so
2938 // we need to return an error here.
2939 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2940 }
2941
2942 if (method_oop == NULL || method_oop->is_obsolete()) {
2943 *is_obsolete_ptr = true;
2944 } else {
2945 *is_obsolete_ptr = false;
2946 }
2947 return JVMTI_ERROR_NONE;
2948 } /* end IsMethodObsolete */
2949
2950 //
2951 // Raw Monitor functions
2952 //
2953
2954 // name - pre-checked for NULL
2955 // monitor_ptr - pre-checked for NULL
2956 jvmtiError
2957 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
2958 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
2959 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
2960
2961 *monitor_ptr = (jrawMonitorID)rmonitor;
2962
2963 return JVMTI_ERROR_NONE;
2964 } /* end CreateRawMonitor */
2965
2966
2967 // rmonitor - pre-checked for validity
2968 jvmtiError
2969 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
2970 if (Threads::number_of_threads() == 0) {
2971 // Remove this monitor from pending raw monitors list
2972 // if it has entered in onload or start phase.
2973 JvmtiPendingMonitors::destroy(rmonitor);
2974 } else {
2975 Thread* thread = Thread::current();
2976 if (rmonitor->is_entered(thread)) {
2977 // The caller owns this monitor which we are about to destroy.
2978 // We exit the underlying synchronization object so that the
2979 // "delete monitor" call below can work without an assertion
2980 // failure on systems that don't like destroying synchronization
2981 // objects that are locked.
2982 int r;
2983 intptr_t recursion = rmonitor->recursions();
2984 for (intptr_t i=0; i <= recursion; i++) {
2985 r = rmonitor->raw_exit(thread);
2986 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
2987 if (r != ObjectMonitor::OM_OK) { // robustness
2988 return JVMTI_ERROR_INTERNAL;
2989 }
2990 }
2991 }
2992 if (rmonitor->owner() != NULL) {
2993 // The caller is trying to destroy a monitor that is locked by
2994 // someone else. While this is not forbidden by the JVMTI
2995 // spec, it will cause an assertion failure on systems that don't
2996 // like destroying synchronization objects that are locked.
2997 // We indicate a problem with the error return (and leak the
2998 // monitor's memory).
2999 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3000 }
3001 }
3002
3003 delete rmonitor;
3004
3005 return JVMTI_ERROR_NONE;
3006 } /* end DestroyRawMonitor */
3007
3008
3009 // rmonitor - pre-checked for validity
3010 jvmtiError
3011 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3012 if (Threads::number_of_threads() == 0) {
3013 // No JavaThreads exist so ObjectMonitor enter cannot be
3014 // used, add this raw monitor to the pending list.
3015 // The pending monitors will be actually entered when
3016 // the VM is setup.
3017 // See transition_pending_raw_monitors in create_vm()
3018 // in thread.cpp.
3019 JvmtiPendingMonitors::enter(rmonitor);
3020 } else {
3021 int r;
3022 Thread* thread = Thread::current();
3023
3024 if (thread->is_Java_thread()) {
3025 JavaThread* current_thread = (JavaThread*)thread;
3026
3027 #ifdef PROPER_TRANSITIONS
3028 // Not really unknown but ThreadInVMfromNative does more than we want
3029 ThreadInVMfromUnknown __tiv;
3030 {
3031 ThreadBlockInVM __tbivm(current_thread);
3032 r = rmonitor->raw_enter(current_thread);
3033 }
3034 #else
3035 /* Transition to thread_blocked without entering vm state */
3036 /* This is really evil. Normally you can't undo _thread_blocked */
3037 /* transitions like this because it would cause us to miss a */
3038 /* safepoint but since the thread was already in _thread_in_native */
3039 /* the thread is not leaving a safepoint safe state and it will */
3040 /* block when it tries to return from native. We can't safepoint */
3041 /* block in here because we could deadlock the vmthread. Blech. */
3042
3043 JavaThreadState state = current_thread->thread_state();
3044 assert(state == _thread_in_native, "Must be _thread_in_native");
3045 // frame should already be walkable since we are in native
3046 assert(!current_thread->has_last_Java_frame() ||
3047 current_thread->frame_anchor()->walkable(), "Must be walkable");
3048 current_thread->set_thread_state(_thread_blocked);
3049
3050 r = rmonitor->raw_enter(current_thread);
3051 // restore state, still at a safepoint safe state
3052 current_thread->set_thread_state(state);
3053
3054 #endif /* PROPER_TRANSITIONS */
3055 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3056 } else {
3057 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3058 r = rmonitor->raw_enter(thread);
3059 } else {
3060 ShouldNotReachHere();
3061 }
3062 }
3063
3064 if (r != ObjectMonitor::OM_OK) { // robustness
3065 return JVMTI_ERROR_INTERNAL;
3066 }
3067 }
3068 return JVMTI_ERROR_NONE;
3069 } /* end RawMonitorEnter */
3070
3071
3072 // rmonitor - pre-checked for validity
3073 jvmtiError
3074 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3075 jvmtiError err = JVMTI_ERROR_NONE;
3076
3077 if (Threads::number_of_threads() == 0) {
3078 // No JavaThreads exist so just remove this monitor from the pending list.
3079 // Bool value from exit is false if rmonitor is not in the list.
3080 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3081 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3082 }
3083 } else {
3084 int r;
3085 Thread* thread = Thread::current();
3086
3087 if (thread->is_Java_thread()) {
3088 JavaThread* current_thread = (JavaThread*)thread;
3089 #ifdef PROPER_TRANSITIONS
3090 // Not really unknown but ThreadInVMfromNative does more than we want
3091 ThreadInVMfromUnknown __tiv;
3092 #endif /* PROPER_TRANSITIONS */
3093 r = rmonitor->raw_exit(current_thread);
3094 } else {
3095 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3096 r = rmonitor->raw_exit(thread);
3097 } else {
3098 ShouldNotReachHere();
3099 }
3100 }
3101
3102 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3103 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3104 } else {
3105 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3106 if (r != ObjectMonitor::OM_OK) { // robustness
3107 err = JVMTI_ERROR_INTERNAL;
3108 }
3109 }
3110 }
3111 return err;
3112 } /* end RawMonitorExit */
3113
3114
3115 // rmonitor - pre-checked for validity
3116 jvmtiError
3117 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3118 int r;
3119 Thread* thread = Thread::current();
3120
3121 if (thread->is_Java_thread()) {
3122 JavaThread* current_thread = (JavaThread*)thread;
3123 #ifdef PROPER_TRANSITIONS
3124 // Not really unknown but ThreadInVMfromNative does more than we want
3125 ThreadInVMfromUnknown __tiv;
3126 {
3127 ThreadBlockInVM __tbivm(current_thread);
3128 r = rmonitor->raw_wait(millis, true, current_thread);
3129 }
3130 #else
3131 /* Transition to thread_blocked without entering vm state */
3132 /* This is really evil. Normally you can't undo _thread_blocked */
3133 /* transitions like this because it would cause us to miss a */
3134 /* safepoint but since the thread was already in _thread_in_native */
3135 /* the thread is not leaving a safepoint safe state and it will */
3136 /* block when it tries to return from native. We can't safepoint */
3137 /* block in here because we could deadlock the vmthread. Blech. */
3138
3139 JavaThreadState state = current_thread->thread_state();
3140 assert(state == _thread_in_native, "Must be _thread_in_native");
3141 // frame should already be walkable since we are in native
3142 assert(!current_thread->has_last_Java_frame() ||
3143 current_thread->frame_anchor()->walkable(), "Must be walkable");
3144 current_thread->set_thread_state(_thread_blocked);
3145
3146 r = rmonitor->raw_wait(millis, true, current_thread);
3147 // restore state, still at a safepoint safe state
3148 current_thread->set_thread_state(state);
3149
3150 #endif /* PROPER_TRANSITIONS */
3151 } else {
3152 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3153 r = rmonitor->raw_wait(millis, true, thread);
3154 } else {
3155 ShouldNotReachHere();
3156 }
3157 }
3158
3159 switch (r) {
3160 case ObjectMonitor::OM_INTERRUPTED:
3161 return JVMTI_ERROR_INTERRUPT;
3162 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3163 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3164 }
3165 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3166 if (r != ObjectMonitor::OM_OK) { // robustness
3167 return JVMTI_ERROR_INTERNAL;
3168 }
3169
3170 return JVMTI_ERROR_NONE;
3171 } /* end RawMonitorWait */
3172
3173
3174 // rmonitor - pre-checked for validity
3175 jvmtiError
3176 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3177 int r;
3178 Thread* thread = Thread::current();
3179
3180 if (thread->is_Java_thread()) {
3181 JavaThread* current_thread = (JavaThread*)thread;
3182 // Not really unknown but ThreadInVMfromNative does more than we want
3183 ThreadInVMfromUnknown __tiv;
3184 r = rmonitor->raw_notify(current_thread);
3185 } else {
3186 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3187 r = rmonitor->raw_notify(thread);
3188 } else {
3189 ShouldNotReachHere();
3190 }
3191 }
3192
3193 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3194 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3195 }
3196 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3197 if (r != ObjectMonitor::OM_OK) { // robustness
3198 return JVMTI_ERROR_INTERNAL;
3199 }
3200
3201 return JVMTI_ERROR_NONE;
3202 } /* end RawMonitorNotify */
3203
3204
3205 // rmonitor - pre-checked for validity
3206 jvmtiError
3207 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3208 int r;
3209 Thread* thread = Thread::current();
3210
3211 if (thread->is_Java_thread()) {
3212 JavaThread* current_thread = (JavaThread*)thread;
3213 ThreadInVMfromUnknown __tiv;
3214 r = rmonitor->raw_notifyAll(current_thread);
3215 } else {
3216 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3217 r = rmonitor->raw_notifyAll(thread);
3218 } else {
3219 ShouldNotReachHere();
3220 }
3221 }
3222
3223 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3224 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3225 }
3226 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3227 if (r != ObjectMonitor::OM_OK) { // robustness
3228 return JVMTI_ERROR_INTERNAL;
3229 }
3230
3231 return JVMTI_ERROR_NONE;
3232 } /* end RawMonitorNotifyAll */
3233
3234
3235 //
3236 // JNI Function Interception functions
3237 //
3238
3239
3240 // function_table - pre-checked for NULL
3241 jvmtiError
3242 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3243 // Copy jni function table at safepoint.
3244 VM_JNIFunctionTableCopier copier(function_table);
3245 VMThread::execute(&copier);
3246
3247 return JVMTI_ERROR_NONE;
3248 } /* end SetJNIFunctionTable */
3249
3250
3251 // function_table - pre-checked for NULL
3252 jvmtiError
3253 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3254 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3255 if (*function_table == NULL)
3256 return JVMTI_ERROR_OUT_OF_MEMORY;
3257 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3258 return JVMTI_ERROR_NONE;
3259 } /* end GetJNIFunctionTable */
3260
3261
3262 //
3263 // Event Management functions
3264 //
3265
3266 jvmtiError
3267 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3268 // can only generate two event types
3269 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3270 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3271 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3272 }
3273
3274 // for compiled_method_load events we must check that the environment
3275 // has the can_generate_compiled_method_load_events capability.
3276 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3277 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3278 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3279 }
3280 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3281 } else {
3282 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3283 }
3284
3285 } /* end GenerateEvents */
3286
3287
3288 //
3289 // Extension Mechanism functions
3290 //
3291
3292 // extension_count_ptr - pre-checked for NULL
3293 // extensions - pre-checked for NULL
3294 jvmtiError
3295 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3296 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3297 } /* end GetExtensionFunctions */
3298
3299
3300 // extension_count_ptr - pre-checked for NULL
3301 // extensions - pre-checked for NULL
3302 jvmtiError
3303 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3304 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3305 } /* end GetExtensionEvents */
3306
3307
3308 // callback - NULL is a valid value, must be checked
3309 jvmtiError
3310 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3311 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3312 } /* end SetExtensionEventCallback */
3313
3314 //
3315 // Timers functions
3316 //
3317
3318 // info_ptr - pre-checked for NULL
3319 jvmtiError
3320 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3321 os::current_thread_cpu_time_info(info_ptr);
3322 return JVMTI_ERROR_NONE;
3323 } /* end GetCurrentThreadCpuTimerInfo */
3324
3325
3326 // nanos_ptr - pre-checked for NULL
3327 jvmtiError
3328 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3329 *nanos_ptr = os::current_thread_cpu_time();
3330 return JVMTI_ERROR_NONE;
3331 } /* end GetCurrentThreadCpuTime */
3332
3333
3334 // info_ptr - pre-checked for NULL
3335 jvmtiError
3336 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3337 os::thread_cpu_time_info(info_ptr);
3338 return JVMTI_ERROR_NONE;
3339 } /* end GetThreadCpuTimerInfo */
3340
3341
3342 // Threads_lock NOT held, java_thread not protected by lock
3343 // java_thread - pre-checked
3344 // nanos_ptr - pre-checked for NULL
3345 jvmtiError
3346 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3347 *nanos_ptr = os::thread_cpu_time(java_thread);
3348 return JVMTI_ERROR_NONE;
3349 } /* end GetThreadCpuTime */
3350
3351
3352 // info_ptr - pre-checked for NULL
3353 jvmtiError
3354 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3355 os::javaTimeNanos_info(info_ptr);
3356 return JVMTI_ERROR_NONE;
3357 } /* end GetTimerInfo */
3358
3359
3360 // nanos_ptr - pre-checked for NULL
3361 jvmtiError
3362 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3363 *nanos_ptr = os::javaTimeNanos();
3364 return JVMTI_ERROR_NONE;
3365 } /* end GetTime */
3366
3367
3368 // processor_count_ptr - pre-checked for NULL
3369 jvmtiError
3370 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3371 *processor_count_ptr = os::active_processor_count();
3372 return JVMTI_ERROR_NONE;
3373 } /* end GetAvailableProcessors */
3374
3375 //
3376 // System Properties functions
3377 //
3378
3379 // count_ptr - pre-checked for NULL
3380 // property_ptr - pre-checked for NULL
3381 jvmtiError
3382 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3383 jvmtiError err = JVMTI_ERROR_NONE;
3384
3385 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3386
3387 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3388 if (err != JVMTI_ERROR_NONE) {
3389 return err;
3390 }
3391 int i = 0 ;
3392 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3393 const char *key = p->key();
3394 char **tmp_value = *property_ptr+i;
3395 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3396 if (err == JVMTI_ERROR_NONE) {
3397 strcpy(*tmp_value, key);
3398 } else {
3399 // clean up previously allocated memory.
3400 for (int j=0; j<i; j++) {
3401 Deallocate((unsigned char*)*property_ptr+j);
3402 }
3403 Deallocate((unsigned char*)property_ptr);
3404 break;
3405 }
3406 }
3407 return err;
3408 } /* end GetSystemProperties */
3409
3410
3411 // property - pre-checked for NULL
3412 // value_ptr - pre-checked for NULL
3413 jvmtiError
3414 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3415 jvmtiError err = JVMTI_ERROR_NONE;
3416 const char *value;
3417
3418 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3419 if (value == NULL) {
3420 err = JVMTI_ERROR_NOT_AVAILABLE;
3421 } else {
3422 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3423 if (err == JVMTI_ERROR_NONE) {
3424 strcpy(*value_ptr, value);
3425 }
3426 }
3427 return err;
3428 } /* end GetSystemProperty */
3429
3430
3431 // property - pre-checked for NULL
3432 // value - NULL is a valid value, must be checked
3433 jvmtiError
3434 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3435 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3436
3437 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3438 if (strcmp(property, p->key()) == 0) {
3439 if (p->set_value((char *)value_ptr)) {
3440 err = JVMTI_ERROR_NONE;
3441 }
3442 }
3443 }
3444 return err;
3445 } /* end SetSystemProperty */