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