1 /*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "interpreter/bytecodeStream.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "jvmtifiles/jvmtiEnv.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "memory/universe.inline.hpp"
33 #include "oops/instanceKlass.hpp"
34 #include "prims/jniCheck.hpp"
35 #include "prims/jvm_misc.hpp"
36 #include "prims/jvmtiAgentThread.hpp"
37 #include "prims/jvmtiClassFileReconstituter.hpp"
38 #include "prims/jvmtiCodeBlobEvents.hpp"
39 #include "prims/jvmtiExtensions.hpp"
40 #include "prims/jvmtiGetLoadedClasses.hpp"
41 #include "prims/jvmtiImpl.hpp"
42 #include "prims/jvmtiManageCapabilities.hpp"
43 #include "prims/jvmtiRawMonitor.hpp"
44 #include "prims/jvmtiRedefineClasses.hpp"
45 #include "prims/jvmtiTagMap.hpp"
46 #include "prims/jvmtiThreadState.inline.hpp"
47 #include "prims/jvmtiUtil.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/deoptimization.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/osThread.hpp"
54 #include "runtime/reflectionUtils.hpp"
55 #include "runtime/signature.hpp"
56 #include "runtime/thread.inline.hpp"
57 #include "runtime/vframe.hpp"
58 #include "runtime/vmThread.hpp"
59 #include "services/threadService.hpp"
60 #include "utilities/exceptions.hpp"
61 #include "utilities/preserveException.hpp"
62
63
64 #define FIXLATER 0 // REMOVE this when completed.
65
66 // FIXLATER: hook into JvmtiTrace
67 #define TraceJVMTICalls false
68
69 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
70 }
71
72 JvmtiEnv::~JvmtiEnv() {
73 }
74
75 JvmtiEnv*
76 JvmtiEnv::create_a_jvmti(jint version) {
77 return new JvmtiEnv(version);
78 }
79
80 // VM operation class to copy jni function table at safepoint.
81 // More than one java threads or jvmti agents may be reading/
82 // modifying jni function tables. To reduce the risk of bad
83 // interaction b/w these threads it is copied at safepoint.
84 class VM_JNIFunctionTableCopier : public VM_Operation {
85 private:
86 const struct JNINativeInterface_ *_function_table;
87 public:
88 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
89 _function_table = func_tbl;
90 };
91
92 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
93 void doit() {
94 copy_jni_function_table(_function_table);
95 };
96 };
97
98 //
99 // Do not change the "prefix" marker below, everything above it is copied
100 // unchanged into the filled stub, everything below is controlled by the
101 // stub filler (only method bodies are carried forward, and then only for
102 // functionality still in the spec).
103 //
104 // end file prefix
105
106 //
107 // Memory Management functions
108 //
109
110 // mem_ptr - pre-checked for NULL
111 jvmtiError
112 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
113 return allocate(size, mem_ptr);
114 } /* end Allocate */
115
116
117 // mem - NULL is a valid value, must be checked
118 jvmtiError
119 JvmtiEnv::Deallocate(unsigned char* mem) {
120 return deallocate(mem);
121 } /* end Deallocate */
122
123 // Threads_lock NOT held, java_thread not protected by lock
124 // java_thread - pre-checked
125 // data - NULL is a valid value, must be checked
126 jvmtiError
127 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
128 JvmtiThreadState* state = java_thread->jvmti_thread_state();
129 if (state == NULL) {
130 if (data == NULL) {
131 // leaving state unset same as data set to NULL
132 return JVMTI_ERROR_NONE;
133 }
134 // otherwise, create the state
135 state = JvmtiThreadState::state_for(java_thread);
136 if (state == NULL) {
137 return JVMTI_ERROR_THREAD_NOT_ALIVE;
138 }
139 }
140 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
141 return JVMTI_ERROR_NONE;
142 } /* end SetThreadLocalStorage */
143
144
145 // Threads_lock NOT held
146 // thread - NOT pre-checked
147 // data_ptr - pre-checked for NULL
148 jvmtiError
149 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
150 JavaThread* current_thread = JavaThread::current();
151 if (thread == NULL) {
152 JvmtiThreadState* state = current_thread->jvmti_thread_state();
153 *data_ptr = (state == NULL) ? NULL :
154 state->env_thread_state(this)->get_agent_thread_local_storage_data();
155 } else {
156
157 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
158 // the thread to _thread_in_vm. However, when the TLS for a thread
159 // other than the current thread is required we need to transition
160 // from native so as to resolve the jthread.
161
162 ThreadInVMfromNative __tiv(current_thread);
163 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
164 debug_only(VMNativeEntryWrapper __vew;)
165
166 oop thread_oop = JNIHandles::resolve_external_guard(thread);
167 if (thread_oop == NULL) {
168 return JVMTI_ERROR_INVALID_THREAD;
169 }
170 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
171 return JVMTI_ERROR_INVALID_THREAD;
172 }
173 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
174 if (java_thread == NULL) {
175 return JVMTI_ERROR_THREAD_NOT_ALIVE;
176 }
177 JvmtiThreadState* state = java_thread->jvmti_thread_state();
178 *data_ptr = (state == NULL) ? NULL :
179 state->env_thread_state(this)->get_agent_thread_local_storage_data();
180 }
181 return JVMTI_ERROR_NONE;
182 } /* end GetThreadLocalStorage */
183
184 //
185 // Class functions
186 //
187
188 // class_count_ptr - pre-checked for NULL
189 // classes_ptr - pre-checked for NULL
190 jvmtiError
191 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
192 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
193 } /* end GetLoadedClasses */
194
195
196 // initiating_loader - NULL is a valid value, must be checked
197 // class_count_ptr - pre-checked for NULL
198 // classes_ptr - pre-checked for NULL
199 jvmtiError
200 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
201 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
202 class_count_ptr, classes_ptr);
203 } /* end GetClassLoaderClasses */
204
205 // k_mirror - may be primitive, this must be checked
206 // is_modifiable_class_ptr - pre-checked for NULL
207 jvmtiError
208 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
209 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
210 JNI_TRUE : JNI_FALSE;
211 return JVMTI_ERROR_NONE;
212 } /* end IsModifiableClass */
213
214 // class_count - pre-checked to be greater than or equal to 0
215 // classes - pre-checked for NULL
216 jvmtiError
217 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
218 //TODO: add locking
219
220 int index;
221 JavaThread* current_thread = JavaThread::current();
222 ResourceMark rm(current_thread);
223
224 jvmtiClassDefinition* class_definitions =
225 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
226 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
227
228 for (index = 0; index < class_count; index++) {
229 HandleMark hm(current_thread);
230
231 jclass jcls = classes[index];
232 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
233 if (k_mirror == NULL) {
234 return JVMTI_ERROR_INVALID_CLASS;
235 }
236 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
237 return JVMTI_ERROR_INVALID_CLASS;
238 }
239
240 if (java_lang_Class::is_primitive(k_mirror)) {
241 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
242 }
243
244 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
245 KlassHandle klass(current_thread, k_oop);
246
247 jint status = klass->jvmti_class_status();
248 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
249 return JVMTI_ERROR_INVALID_CLASS;
250 }
251 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
252 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
253 }
254
255 instanceKlassHandle ikh(current_thread, k_oop);
256 if (ikh->get_cached_class_file_bytes() == NULL) {
257 // Not cached, we need to reconstitute the class file from the
258 // VM representation. We don't attach the reconstituted class
259 // bytes to the InstanceKlass here because they have not been
260 // validated and we're not at a safepoint.
261 constantPoolHandle constants(current_thread, ikh->constants());
262 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
263
264 JvmtiClassFileReconstituter reconstituter(ikh);
265 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
266 return reconstituter.get_error();
267 }
268
269 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
270 class_definitions[index].class_bytes = (unsigned char*)
271 reconstituter.class_file_bytes();
272 } else {
273 // it is cached, get it from the cache
274 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
275 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
276 }
277 class_definitions[index].klass = jcls;
278 }
279 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
280 VMThread::execute(&op);
281 return (op.check_error());
282 } /* end RetransformClasses */
283
284
285 // class_count - pre-checked to be greater than or equal to 0
286 // class_definitions - pre-checked for NULL
287 jvmtiError
288 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
289 //TODO: add locking
290 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
291 VMThread::execute(&op);
292 return (op.check_error());
293 } /* end RedefineClasses */
294
295
296 //
297 // Object functions
298 //
299
300 // size_ptr - pre-checked for NULL
301 jvmtiError
302 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
303 oop mirror = JNIHandles::resolve_external_guard(object);
304 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
305
306 if (mirror->klass() == SystemDictionary::Class_klass() &&
307 !java_lang_Class::is_primitive(mirror)) {
308 Klass* k = java_lang_Class::as_Klass(mirror);
309 assert(k != NULL, "class for non-primitive mirror must exist");
310 *size_ptr = k->size() * wordSize;
311 } else {
312 *size_ptr = mirror->size() * wordSize;
313 }
314 return JVMTI_ERROR_NONE;
315 } /* end GetObjectSize */
316
317 //
318 // Method functions
319 //
320
321 // prefix - NULL is a valid value, must be checked
322 jvmtiError
323 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
324 return prefix == NULL?
325 SetNativeMethodPrefixes(0, NULL) :
326 SetNativeMethodPrefixes(1, (char**)&prefix);
327 } /* end SetNativeMethodPrefix */
328
329
330 // prefix_count - pre-checked to be greater than or equal to 0
331 // prefixes - pre-checked for NULL
332 jvmtiError
333 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
334 // Have to grab JVMTI thread state lock to be sure that some thread
335 // isn't accessing the prefixes at the same time we are setting them.
336 // No locks during VM bring-up.
337 if (Threads::number_of_threads() == 0) {
338 return set_native_method_prefixes(prefix_count, prefixes);
339 } else {
340 MutexLocker mu(JvmtiThreadState_lock);
341 return set_native_method_prefixes(prefix_count, prefixes);
342 }
343 } /* end SetNativeMethodPrefixes */
344
345 //
346 // Event Management functions
347 //
348
349 // callbacks - NULL is a valid value, must be checked
350 // size_of_callbacks - pre-checked to be greater than or equal to 0
351 jvmtiError
352 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
353 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
354 return JVMTI_ERROR_NONE;
355 } /* end SetEventCallbacks */
356
357
358 // event_thread - NULL is a valid value, must be checked
359 jvmtiError
360 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
361 JavaThread* java_thread = NULL;
362 if (event_thread != NULL) {
363 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
364 if (thread_oop == NULL) {
365 return JVMTI_ERROR_INVALID_THREAD;
366 }
367 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
368 return JVMTI_ERROR_INVALID_THREAD;
369 }
370 java_thread = java_lang_Thread::thread(thread_oop);
371 if (java_thread == NULL) {
372 return JVMTI_ERROR_THREAD_NOT_ALIVE;
373 }
374 }
375
376 // event_type must be valid
377 if (!JvmtiEventController::is_valid_event_type(event_type)) {
378 return JVMTI_ERROR_INVALID_EVENT_TYPE;
379 }
380
381 // global events cannot be controlled at thread level.
382 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
383 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
384 }
385
386 bool enabled = (mode == JVMTI_ENABLE);
387
388 // assure that needed capabilities are present
389 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
390 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
391 }
392
393 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
394 record_class_file_load_hook_enabled();
395 }
396 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
397
398 return JVMTI_ERROR_NONE;
399 } /* end SetEventNotificationMode */
400
401 //
402 // Capability functions
403 //
404
405 // capabilities_ptr - pre-checked for NULL
406 jvmtiError
407 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
408 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
409 get_prohibited_capabilities(),
410 capabilities_ptr);
411 return JVMTI_ERROR_NONE;
412 } /* end GetPotentialCapabilities */
413
414
415 // capabilities_ptr - pre-checked for NULL
416 jvmtiError
417 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
418 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
419 get_prohibited_capabilities(),
420 capabilities_ptr,
421 get_capabilities());
422 } /* end AddCapabilities */
423
424
425 // capabilities_ptr - pre-checked for NULL
426 jvmtiError
427 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
428 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
429 return JVMTI_ERROR_NONE;
430 } /* end RelinquishCapabilities */
431
432
433 // capabilities_ptr - pre-checked for NULL
434 jvmtiError
435 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
436 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
437 return JVMTI_ERROR_NONE;
438 } /* end GetCapabilities */
439
440 //
441 // Class Loader Search functions
442 //
443
444 // segment - pre-checked for NULL
445 jvmtiError
446 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
447 jvmtiPhase phase = get_phase();
448 if (phase == JVMTI_PHASE_ONLOAD) {
449 Arguments::append_sysclasspath(segment);
450 return JVMTI_ERROR_NONE;
451 } else if (use_version_1_0_semantics()) {
452 // This JvmtiEnv requested version 1.0 semantics and this function
453 // is only allowed in the ONLOAD phase in version 1.0 so we need to
454 // return an error here.
455 return JVMTI_ERROR_WRONG_PHASE;
456 } else if (phase == JVMTI_PHASE_LIVE) {
457 // The phase is checked by the wrapper that called this function,
458 // but this thread could be racing with the thread that is
459 // terminating the VM so we check one more time.
460
461 // create the zip entry
462 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
463 if (zip_entry == NULL) {
464 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
465 }
466
467 // lock the loader
468 Thread* thread = Thread::current();
469 HandleMark hm;
470 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
471
472 ObjectLocker ol(loader_lock, thread);
473
474 // add the jar file to the bootclasspath
475 if (TraceClassLoading) {
476 tty->print_cr("[Opened %s]", zip_entry->name());
477 }
478 ClassLoader::add_to_list(zip_entry);
479 return JVMTI_ERROR_NONE;
480 } else {
481 return JVMTI_ERROR_WRONG_PHASE;
482 }
483
484 } /* end AddToBootstrapClassLoaderSearch */
485
486
487 // segment - pre-checked for NULL
488 jvmtiError
489 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
490 jvmtiPhase phase = get_phase();
491
492 if (phase == JVMTI_PHASE_ONLOAD) {
493 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
494 if (strcmp("java.class.path", p->key()) == 0) {
495 p->append_value(segment);
496 break;
497 }
498 }
499 return JVMTI_ERROR_NONE;
500 } else if (phase == JVMTI_PHASE_LIVE) {
501 // The phase is checked by the wrapper that called this function,
502 // but this thread could be racing with the thread that is
503 // terminating the VM so we check one more time.
504 HandleMark hm;
505
506 // create the zip entry (which will open the zip file and hence
507 // check that the segment is indeed a zip file).
508 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
509 if (zip_entry == NULL) {
510 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
511 }
512 delete zip_entry; // no longer needed
513
514 // lock the loader
515 Thread* THREAD = Thread::current();
516 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
517
518 ObjectLocker ol(loader, THREAD);
519
520 // need the path as java.lang.String
521 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
522 if (HAS_PENDING_EXCEPTION) {
523 CLEAR_PENDING_EXCEPTION;
524 return JVMTI_ERROR_INTERNAL;
525 }
526
527 instanceKlassHandle loader_ik(THREAD, loader->klass());
528
529 // Invoke the appendToClassPathForInstrumentation method - if the method
530 // is not found it means the loader doesn't support adding to the class path
531 // in the live phase.
532 {
533 JavaValue res(T_VOID);
534 JavaCalls::call_special(&res,
535 loader,
536 loader_ik,
537 vmSymbols::appendToClassPathForInstrumentation_name(),
538 vmSymbols::appendToClassPathForInstrumentation_signature(),
539 path,
540 THREAD);
541 if (HAS_PENDING_EXCEPTION) {
542 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
543 CLEAR_PENDING_EXCEPTION;
544
545 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
546 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
547 } else {
548 return JVMTI_ERROR_INTERNAL;
549 }
550 }
551 }
552
553 return JVMTI_ERROR_NONE;
554 } else {
555 return JVMTI_ERROR_WRONG_PHASE;
556 }
557 } /* end AddToSystemClassLoaderSearch */
558
559 //
560 // General functions
561 //
562
563 // phase_ptr - pre-checked for NULL
564 jvmtiError
565 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
566 *phase_ptr = get_phase();
567 return JVMTI_ERROR_NONE;
568 } /* end GetPhase */
569
570
571 jvmtiError
572 JvmtiEnv::DisposeEnvironment() {
573 dispose();
574 return JVMTI_ERROR_NONE;
575 } /* end DisposeEnvironment */
576
577
578 // data - NULL is a valid value, must be checked
579 jvmtiError
580 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
581 set_env_local_storage(data);
582 return JVMTI_ERROR_NONE;
583 } /* end SetEnvironmentLocalStorage */
584
585
586 // data_ptr - pre-checked for NULL
587 jvmtiError
588 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
589 *data_ptr = (void*)get_env_local_storage();
590 return JVMTI_ERROR_NONE;
591 } /* end GetEnvironmentLocalStorage */
592
593 // version_ptr - pre-checked for NULL
594 jvmtiError
595 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
596 *version_ptr = JVMTI_VERSION;
597 return JVMTI_ERROR_NONE;
598 } /* end GetVersionNumber */
599
600
601 // name_ptr - pre-checked for NULL
602 jvmtiError
603 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
604 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
605 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
606 }
607 const char *name = JvmtiUtil::error_name(error);
608 if (name == NULL) {
609 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
610 }
611 size_t len = strlen(name) + 1;
612 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
613 if (err == JVMTI_ERROR_NONE) {
614 memcpy(*name_ptr, name, len);
615 }
616 return err;
617 } /* end GetErrorName */
618
619
620 jvmtiError
621 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
622 switch (flag) {
623 case JVMTI_VERBOSE_OTHER:
624 // ignore
625 break;
626 case JVMTI_VERBOSE_CLASS:
627 TraceClassLoading = value != 0;
628 TraceClassUnloading = value != 0;
629 break;
630 case JVMTI_VERBOSE_GC:
631 PrintGC = value != 0;
632 break;
633 case JVMTI_VERBOSE_JNI:
634 PrintJNIResolving = value != 0;
635 break;
636 default:
637 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
638 };
639 return JVMTI_ERROR_NONE;
640 } /* end SetVerboseFlag */
641
642
643 // format_ptr - pre-checked for NULL
644 jvmtiError
645 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
646 *format_ptr = JVMTI_JLOCATION_JVMBCI;
647 return JVMTI_ERROR_NONE;
648 } /* end GetJLocationFormat */
649
650 //
651 // Thread functions
652 //
653
654 // Threads_lock NOT held
655 // thread - NOT pre-checked
656 // thread_state_ptr - pre-checked for NULL
657 jvmtiError
658 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
659 jint state;
660 oop thread_oop;
661 JavaThread* thr;
662
663 if (thread == NULL) {
664 thread_oop = JavaThread::current()->threadObj();
665 } else {
666 thread_oop = JNIHandles::resolve_external_guard(thread);
667 }
668
669 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
670 return JVMTI_ERROR_INVALID_THREAD;
671 }
672
673 // get most state bits
674 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
675
676 // add more state bits
677 thr = java_lang_Thread::thread(thread_oop);
678 if (thr != NULL) {
679 JavaThreadState jts = thr->thread_state();
680
681 if (thr->is_being_ext_suspended()) {
682 state |= JVMTI_THREAD_STATE_SUSPENDED;
683 }
684 if (jts == _thread_in_native) {
685 state |= JVMTI_THREAD_STATE_IN_NATIVE;
686 }
687 OSThread* osThread = thr->osthread();
688 if (osThread != NULL && osThread->interrupted()) {
689 state |= JVMTI_THREAD_STATE_INTERRUPTED;
690 }
691 }
692
693 *thread_state_ptr = state;
694 return JVMTI_ERROR_NONE;
695 } /* end GetThreadState */
696
697
698 // thread_ptr - pre-checked for NULL
699 jvmtiError
700 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
701 JavaThread* current_thread = JavaThread::current();
702 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
703 return JVMTI_ERROR_NONE;
704 } /* end GetCurrentThread */
705
706
707 // threads_count_ptr - pre-checked for NULL
708 // threads_ptr - pre-checked for NULL
709 jvmtiError
710 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
711 int nthreads = 0;
712 Handle *thread_objs = NULL;
713 ResourceMark rm;
714 HandleMark hm;
715
716 // enumerate threads (including agent threads)
717 ThreadsListEnumerator tle(Thread::current(), true);
718 nthreads = tle.num_threads();
719 *threads_count_ptr = nthreads;
720
721 if (nthreads == 0) {
722 *threads_ptr = NULL;
723 return JVMTI_ERROR_NONE;
724 }
725
726 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
727 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
728
729 for (int i=0; i < nthreads; i++) {
730 thread_objs[i] = Handle(tle.get_threadObj(i));
731 }
732
733 // have to make global handles outside of Threads_lock
734 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
735 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
736
737 *threads_ptr = jthreads;
738 return JVMTI_ERROR_NONE;
739 } /* end GetAllThreads */
740
741
742 // Threads_lock NOT held, java_thread not protected by lock
743 // java_thread - pre-checked
744 jvmtiError
745 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
746 // don't allow hidden thread suspend request.
747 if (java_thread->is_hidden_from_external_view()) {
748 return (JVMTI_ERROR_NONE);
749 }
750
751 {
752 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
753 if (java_thread->is_external_suspend()) {
754 // don't allow nested external suspend requests.
755 return (JVMTI_ERROR_THREAD_SUSPENDED);
756 }
757 if (java_thread->is_exiting()) { // thread is in the process of exiting
758 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
759 }
760 java_thread->set_external_suspend();
761 }
762
763 if (!JvmtiSuspendControl::suspend(java_thread)) {
764 // the thread was in the process of exiting
765 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
766 }
767 return JVMTI_ERROR_NONE;
768 } /* end SuspendThread */
769
770
771 // request_count - pre-checked to be greater than or equal to 0
772 // request_list - pre-checked for NULL
773 // results - pre-checked for NULL
774 jvmtiError
775 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
776 int needSafepoint = 0; // > 0 if we need a safepoint
777 for (int i = 0; i < request_count; i++) {
778 JavaThread *java_thread = get_JavaThread(request_list[i]);
779 if (java_thread == NULL) {
780 results[i] = JVMTI_ERROR_INVALID_THREAD;
781 continue;
782 }
783 // the thread has not yet run or has exited (not on threads list)
784 if (java_thread->threadObj() == NULL) {
785 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
786 continue;
787 }
788 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
789 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
790 continue;
791 }
792 // don't allow hidden thread suspend request.
793 if (java_thread->is_hidden_from_external_view()) {
794 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
795 continue;
796 }
797
798 {
799 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
800 if (java_thread->is_external_suspend()) {
801 // don't allow nested external suspend requests.
802 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
803 continue;
804 }
805 if (java_thread->is_exiting()) { // thread is in the process of exiting
806 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
807 continue;
808 }
809 java_thread->set_external_suspend();
810 }
811 if (java_thread->thread_state() == _thread_in_native) {
812 // We need to try and suspend native threads here. Threads in
813 // other states will self-suspend on their next transition.
814 if (!JvmtiSuspendControl::suspend(java_thread)) {
815 // The thread was in the process of exiting. Force another
816 // safepoint to make sure that this thread transitions.
817 needSafepoint++;
818 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
819 continue;
820 }
821 } else {
822 needSafepoint++;
823 }
824 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
825 }
826 if (needSafepoint > 0) {
827 VM_ForceSafepoint vfs;
828 VMThread::execute(&vfs);
829 }
830 // per-thread suspend results returned via results parameter
831 return JVMTI_ERROR_NONE;
832 } /* end SuspendThreadList */
833
834
835 // Threads_lock NOT held, java_thread not protected by lock
836 // java_thread - pre-checked
837 jvmtiError
838 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
839 // don't allow hidden thread resume request.
840 if (java_thread->is_hidden_from_external_view()) {
841 return JVMTI_ERROR_NONE;
842 }
843
844 if (!java_thread->is_being_ext_suspended()) {
845 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
846 }
847
848 if (!JvmtiSuspendControl::resume(java_thread)) {
849 return JVMTI_ERROR_INTERNAL;
850 }
851 return JVMTI_ERROR_NONE;
852 } /* end ResumeThread */
853
854
855 // request_count - pre-checked to be greater than or equal to 0
856 // request_list - pre-checked for NULL
857 // results - pre-checked for NULL
858 jvmtiError
859 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
860 for (int i = 0; i < request_count; i++) {
861 JavaThread *java_thread = get_JavaThread(request_list[i]);
862 if (java_thread == NULL) {
863 results[i] = JVMTI_ERROR_INVALID_THREAD;
864 continue;
865 }
866 // don't allow hidden thread resume request.
867 if (java_thread->is_hidden_from_external_view()) {
868 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
869 continue;
870 }
871 if (!java_thread->is_being_ext_suspended()) {
872 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
873 continue;
874 }
875
876 if (!JvmtiSuspendControl::resume(java_thread)) {
877 results[i] = JVMTI_ERROR_INTERNAL;
878 continue;
879 }
880
881 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
882 }
883 // per-thread resume results returned via results parameter
884 return JVMTI_ERROR_NONE;
885 } /* end ResumeThreadList */
886
887
888 // Threads_lock NOT held, java_thread not protected by lock
889 // java_thread - pre-checked
890 jvmtiError
891 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
892 oop e = JNIHandles::resolve_external_guard(exception);
893 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
894
895 JavaThread::send_async_exception(java_thread->threadObj(), e);
896
897 return JVMTI_ERROR_NONE;
898
899 } /* end StopThread */
900
901
902 // Threads_lock NOT held
903 // thread - NOT pre-checked
904 jvmtiError
905 JvmtiEnv::InterruptThread(jthread thread) {
906 oop thread_oop = JNIHandles::resolve_external_guard(thread);
907 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
908 return JVMTI_ERROR_INVALID_THREAD;
909
910 JavaThread* current_thread = JavaThread::current();
911
912 // Todo: this is a duplicate of JVM_Interrupt; share code in future
913 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
914 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
915 // We need to re-resolve the java_thread, since a GC might have happened during the
916 // acquire of the lock
917
918 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
919 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
920
921 Thread::interrupt(java_thread);
922
923 return JVMTI_ERROR_NONE;
924 } /* end InterruptThread */
925
926
927 // Threads_lock NOT held
928 // thread - NOT pre-checked
929 // info_ptr - pre-checked for NULL
930 jvmtiError
931 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
932 ResourceMark rm;
933 HandleMark hm;
934
935 JavaThread* current_thread = JavaThread::current();
936
937 // if thread is NULL the current thread is used
938 oop thread_oop;
939 if (thread == NULL) {
940 thread_oop = current_thread->threadObj();
941 } else {
942 thread_oop = JNIHandles::resolve_external_guard(thread);
943 }
944 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
945 return JVMTI_ERROR_INVALID_THREAD;
946
947 Handle thread_obj(current_thread, thread_oop);
948 typeArrayHandle name;
949 ThreadPriority priority;
950 Handle thread_group;
951 Handle context_class_loader;
952 bool is_daemon;
953
954 { MutexLocker mu(Threads_lock);
955
956 name = typeArrayHandle(current_thread, java_lang_Thread::name(thread_obj()));
957 priority = java_lang_Thread::priority(thread_obj());
958 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
959 is_daemon = java_lang_Thread::is_daemon(thread_obj());
960
961 oop loader = java_lang_Thread::context_class_loader(thread_obj());
962 context_class_loader = Handle(current_thread, loader);
963 }
964 { const char *n;
965
966 if (name() != NULL) {
967 n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
968 } else {
969 n = UNICODE::as_utf8(NULL, 0);
970 }
971
972 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
973 if (info_ptr->name == NULL)
974 return JVMTI_ERROR_OUT_OF_MEMORY;
975
976 strcpy(info_ptr->name, n);
977 }
978 info_ptr->is_daemon = is_daemon;
979 info_ptr->priority = priority;
980
981 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
982 jni_reference(context_class_loader);
983 info_ptr->thread_group = jni_reference(thread_group);
984
985 return JVMTI_ERROR_NONE;
986 } /* end GetThreadInfo */
987
988
989 // Threads_lock NOT held, java_thread not protected by lock
990 // java_thread - pre-checked
991 // owned_monitor_count_ptr - pre-checked for NULL
992 // owned_monitors_ptr - pre-checked for NULL
993 jvmtiError
994 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
995 jvmtiError err = JVMTI_ERROR_NONE;
996 JavaThread* calling_thread = JavaThread::current();
997
998 // growable array of jvmti monitors info on the C-heap
999 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1000 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1001
1002 // It is only safe to perform the direct operation on the current
1003 // thread. All other usage needs to use a vm-safepoint-op for safety.
1004 if (java_thread == calling_thread) {
1005 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1006 } else {
1007 // JVMTI get monitors info at safepoint. Do not require target thread to
1008 // be suspended.
1009 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1010 VMThread::execute(&op);
1011 err = op.result();
1012 }
1013 jint owned_monitor_count = owned_monitors_list->length();
1014 if (err == JVMTI_ERROR_NONE) {
1015 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1016 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1017 // copy into the returned array
1018 for (int i = 0; i < owned_monitor_count; i++) {
1019 (*owned_monitors_ptr)[i] =
1020 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1021 }
1022 *owned_monitor_count_ptr = owned_monitor_count;
1023 }
1024 }
1025 // clean up.
1026 for (int i = 0; i < owned_monitor_count; i++) {
1027 deallocate((unsigned char*)owned_monitors_list->at(i));
1028 }
1029 delete owned_monitors_list;
1030
1031 return err;
1032 } /* end GetOwnedMonitorInfo */
1033
1034
1035 // Threads_lock NOT held, java_thread not protected by lock
1036 // java_thread - pre-checked
1037 // monitor_info_count_ptr - pre-checked for NULL
1038 // monitor_info_ptr - pre-checked for NULL
1039 jvmtiError
1040 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1041 jvmtiError err = JVMTI_ERROR_NONE;
1042 JavaThread* calling_thread = JavaThread::current();
1043
1044 // growable array of jvmti monitors info on the C-heap
1045 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1046 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1047
1048 // It is only safe to perform the direct operation on the current
1049 // thread. All other usage needs to use a vm-safepoint-op for safety.
1050 if (java_thread == calling_thread) {
1051 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1052 } else {
1053 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1054 // be suspended.
1055 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1056 VMThread::execute(&op);
1057 err = op.result();
1058 }
1059
1060 jint owned_monitor_count = owned_monitors_list->length();
1061 if (err == JVMTI_ERROR_NONE) {
1062 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1063 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1064 // copy to output array.
1065 for (int i = 0; i < owned_monitor_count; i++) {
1066 (*monitor_info_ptr)[i].monitor =
1067 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1068 (*monitor_info_ptr)[i].stack_depth =
1069 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1070 }
1071 }
1072 *monitor_info_count_ptr = owned_monitor_count;
1073 }
1074
1075 // clean up.
1076 for (int i = 0; i < owned_monitor_count; i++) {
1077 deallocate((unsigned char*)owned_monitors_list->at(i));
1078 }
1079 delete owned_monitors_list;
1080
1081 return err;
1082 } /* end GetOwnedMonitorStackDepthInfo */
1083
1084
1085 // Threads_lock NOT held, java_thread not protected by lock
1086 // java_thread - pre-checked
1087 // monitor_ptr - pre-checked for NULL
1088 jvmtiError
1089 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1090 jvmtiError err = JVMTI_ERROR_NONE;
1091 JavaThread* calling_thread = JavaThread::current();
1092
1093 // It is only safe to perform the direct operation on the current
1094 // thread. All other usage needs to use a vm-safepoint-op for safety.
1095 if (java_thread == calling_thread) {
1096 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1097 } else {
1098 // get contended monitor information at safepoint.
1099 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1100 VMThread::execute(&op);
1101 err = op.result();
1102 }
1103 return err;
1104 } /* end GetCurrentContendedMonitor */
1105
1106
1107 // Threads_lock NOT held
1108 // thread - NOT pre-checked
1109 // proc - pre-checked for NULL
1110 // arg - NULL is a valid value, must be checked
1111 jvmtiError
1112 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1113 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1114 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1115 return JVMTI_ERROR_INVALID_THREAD;
1116 }
1117 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1118 return JVMTI_ERROR_INVALID_PRIORITY;
1119 }
1120
1121 //Thread-self
1122 JavaThread* current_thread = JavaThread::current();
1123
1124 Handle thread_hndl(current_thread, thread_oop);
1125 {
1126 MutexLocker mu(Threads_lock); // grab Threads_lock
1127
1128 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1129
1130 // At this point it may be possible that no osthread was created for the
1131 // JavaThread due to lack of memory.
1132 if (new_thread == NULL || new_thread->osthread() == NULL) {
1133 if (new_thread) delete new_thread;
1134 return JVMTI_ERROR_OUT_OF_MEMORY;
1135 }
1136
1137 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1138 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1139 java_lang_Thread::set_daemon(thread_hndl());
1140
1141 new_thread->set_threadObj(thread_hndl());
1142 Threads::add(new_thread);
1143 Thread::start(new_thread);
1144 } // unlock Threads_lock
1145
1146 return JVMTI_ERROR_NONE;
1147 } /* end RunAgentThread */
1148
1149 //
1150 // Thread Group functions
1151 //
1152
1153 // group_count_ptr - pre-checked for NULL
1154 // groups_ptr - pre-checked for NULL
1155 jvmtiError
1156 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1157 JavaThread* current_thread = JavaThread::current();
1158
1159 // Only one top level thread group now.
1160 *group_count_ptr = 1;
1161
1162 // Allocate memory to store global-refs to the thread groups.
1163 // Assume this area is freed by caller.
1164 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1165
1166 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1167
1168 // Convert oop to Handle, then convert Handle to global-ref.
1169 {
1170 HandleMark hm(current_thread);
1171 Handle system_thread_group(current_thread, Universe::system_thread_group());
1172 *groups_ptr[0] = jni_reference(system_thread_group);
1173 }
1174
1175 return JVMTI_ERROR_NONE;
1176 } /* end GetTopThreadGroups */
1177
1178
1179 // info_ptr - pre-checked for NULL
1180 jvmtiError
1181 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1182 ResourceMark rm;
1183 HandleMark hm;
1184
1185 JavaThread* current_thread = JavaThread::current();
1186
1187 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1188 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1189
1190 typeArrayHandle name;
1191 Handle parent_group;
1192 bool is_daemon;
1193 ThreadPriority max_priority;
1194
1195 { MutexLocker mu(Threads_lock);
1196
1197 name = typeArrayHandle(current_thread,
1198 java_lang_ThreadGroup::name(group_obj()));
1199 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1200 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1201 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1202 }
1203
1204 info_ptr->is_daemon = is_daemon;
1205 info_ptr->max_priority = max_priority;
1206 info_ptr->parent = jni_reference(parent_group);
1207
1208 if (name() != NULL) {
1209 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
1210 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
1211 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1212 strcpy(info_ptr->name, n);
1213 } else {
1214 info_ptr->name = NULL;
1215 }
1216
1217 return JVMTI_ERROR_NONE;
1218 } /* end GetThreadGroupInfo */
1219
1220
1221 // thread_count_ptr - pre-checked for NULL
1222 // threads_ptr - pre-checked for NULL
1223 // group_count_ptr - pre-checked for NULL
1224 // groups_ptr - pre-checked for NULL
1225 jvmtiError
1226 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1227 JavaThread* current_thread = JavaThread::current();
1228 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1229 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1230
1231 Handle *thread_objs = NULL;
1232 Handle *group_objs = NULL;
1233 int nthreads = 0;
1234 int ngroups = 0;
1235 int hidden_threads = 0;
1236
1237 ResourceMark rm;
1238 HandleMark hm;
1239
1240 Handle group_hdl(current_thread, group_obj);
1241
1242 { MutexLocker mu(Threads_lock);
1243
1244 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1245 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1246
1247 if (nthreads > 0) {
1248 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1249 assert(nthreads <= threads->length(), "too many threads");
1250 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1251 for (int i=0, j=0; i<nthreads; i++) {
1252 oop thread_obj = threads->obj_at(i);
1253 assert(thread_obj != NULL, "thread_obj is NULL");
1254 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1255 // Filter out hidden java threads.
1256 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1257 hidden_threads++;
1258 continue;
1259 }
1260 thread_objs[j++] = Handle(current_thread, thread_obj);
1261 }
1262 nthreads -= hidden_threads;
1263 }
1264 if (ngroups > 0) {
1265 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1266 assert(ngroups <= groups->length(), "too many threads");
1267 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1268 for (int i=0; i<ngroups; i++) {
1269 oop group_obj = groups->obj_at(i);
1270 assert(group_obj != NULL, "group_obj != NULL");
1271 group_objs[i] = Handle(current_thread, group_obj);
1272 }
1273 }
1274 }
1275
1276 // have to make global handles outside of Threads_lock
1277 *group_count_ptr = ngroups;
1278 *thread_count_ptr = nthreads;
1279 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1280 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1281 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1282 return JVMTI_ERROR_OUT_OF_MEMORY;
1283 }
1284 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1285 return JVMTI_ERROR_OUT_OF_MEMORY;
1286 }
1287
1288 return JVMTI_ERROR_NONE;
1289 } /* end GetThreadGroupChildren */
1290
1291
1292 //
1293 // Stack Frame functions
1294 //
1295
1296 // Threads_lock NOT held, java_thread not protected by lock
1297 // java_thread - pre-checked
1298 // max_frame_count - pre-checked to be greater than or equal to 0
1299 // frame_buffer - pre-checked for NULL
1300 // count_ptr - pre-checked for NULL
1301 jvmtiError
1302 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1303 jvmtiError err = JVMTI_ERROR_NONE;
1304
1305 // It is only safe to perform the direct operation on the current
1306 // thread. All other usage needs to use a vm-safepoint-op for safety.
1307 if (java_thread == JavaThread::current()) {
1308 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1309 } else {
1310 // JVMTI get stack trace at safepoint. Do not require target thread to
1311 // be suspended.
1312 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1313 VMThread::execute(&op);
1314 err = op.result();
1315 }
1316
1317 return err;
1318 } /* end GetStackTrace */
1319
1320
1321 // max_frame_count - pre-checked to be greater than or equal to 0
1322 // stack_info_ptr - pre-checked for NULL
1323 // thread_count_ptr - pre-checked for NULL
1324 jvmtiError
1325 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1326 jvmtiError err = JVMTI_ERROR_NONE;
1327 JavaThread* calling_thread = JavaThread::current();
1328
1329 // JVMTI get stack traces at safepoint.
1330 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1331 VMThread::execute(&op);
1332 *thread_count_ptr = op.final_thread_count();
1333 *stack_info_ptr = op.stack_info();
1334 err = op.result();
1335 return err;
1336 } /* end GetAllStackTraces */
1337
1338
1339 // thread_count - pre-checked to be greater than or equal to 0
1340 // thread_list - pre-checked for NULL
1341 // max_frame_count - pre-checked to be greater than or equal to 0
1342 // stack_info_ptr - pre-checked for NULL
1343 jvmtiError
1344 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1345 jvmtiError err = JVMTI_ERROR_NONE;
1346 // JVMTI get stack traces at safepoint.
1347 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1348 VMThread::execute(&op);
1349 err = op.result();
1350 if (err == JVMTI_ERROR_NONE) {
1351 *stack_info_ptr = op.stack_info();
1352 }
1353 return err;
1354 } /* end GetThreadListStackTraces */
1355
1356
1357 // Threads_lock NOT held, java_thread not protected by lock
1358 // java_thread - pre-checked
1359 // count_ptr - pre-checked for NULL
1360 jvmtiError
1361 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1362 jvmtiError err = JVMTI_ERROR_NONE;
1363
1364 // retrieve or create JvmtiThreadState.
1365 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1366 if (state == NULL) {
1367 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1368 }
1369
1370 // It is only safe to perform the direct operation on the current
1371 // thread. All other usage needs to use a vm-safepoint-op for safety.
1372 if (java_thread == JavaThread::current()) {
1373 err = get_frame_count(state, count_ptr);
1374 } else {
1375 // get java stack frame count at safepoint.
1376 VM_GetFrameCount op(this, state, count_ptr);
1377 VMThread::execute(&op);
1378 err = op.result();
1379 }
1380 return err;
1381 } /* end GetFrameCount */
1382
1383
1384 // Threads_lock NOT held, java_thread not protected by lock
1385 // java_thread - pre-checked
1386 jvmtiError
1387 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1388 JavaThread* current_thread = JavaThread::current();
1389 HandleMark hm(current_thread);
1390 uint32_t debug_bits = 0;
1391
1392 // retrieve or create the state
1393 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1394 if (state == NULL) {
1395 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1396 }
1397
1398 // Check if java_thread is fully suspended
1399 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1400 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1401 }
1402 // Check to see if a PopFrame was already in progress
1403 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1404 // Probably possible for JVMTI clients to trigger this, but the
1405 // JPDA backend shouldn't allow this to happen
1406 return JVMTI_ERROR_INTERNAL;
1407 }
1408
1409 {
1410 // Was workaround bug
1411 // 4812902: popFrame hangs if the method is waiting at a synchronize
1412 // Catch this condition and return an error to avoid hanging.
1413 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1414 OSThread* osThread = java_thread->osthread();
1415 if (osThread->get_state() == MONITOR_WAIT) {
1416 return JVMTI_ERROR_OPAQUE_FRAME;
1417 }
1418 }
1419
1420 {
1421 ResourceMark rm(current_thread);
1422 // Check if there are more than one Java frame in this thread, that the top two frames
1423 // are Java (not native) frames, and that there is no intervening VM frame
1424 int frame_count = 0;
1425 bool is_interpreted[2];
1426 intptr_t *frame_sp[2];
1427 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1428 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1429 methodHandle mh(current_thread, vfs.method());
1430 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1431 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1432 frame_sp[frame_count] = vfs.frame_id();
1433 if (++frame_count > 1) break;
1434 }
1435 if (frame_count < 2) {
1436 // We haven't found two adjacent non-native Java frames on the top.
1437 // There can be two situations here:
1438 // 1. There are no more java frames
1439 // 2. Two top java frames are separated by non-java native frames
1440 if(vframeFor(java_thread, 1) == NULL) {
1441 return JVMTI_ERROR_NO_MORE_FRAMES;
1442 } else {
1443 // Intervening non-java native or VM frames separate java frames.
1444 // Current implementation does not support this. See bug #5031735.
1445 // In theory it is possible to pop frames in such cases.
1446 return JVMTI_ERROR_OPAQUE_FRAME;
1447 }
1448 }
1449
1450 // If any of the top 2 frames is a compiled one, need to deoptimize it
1451 for (int i = 0; i < 2; i++) {
1452 if (!is_interpreted[i]) {
1453 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1454 }
1455 }
1456
1457 // Update the thread state to reflect that the top frame is popped
1458 // so that cur_stack_depth is maintained properly and all frameIDs
1459 // are invalidated.
1460 // The current frame will be popped later when the suspended thread
1461 // is resumed and right before returning from VM to Java.
1462 // (see call_VM_base() in assembler_<cpu>.cpp).
1463
1464 // It's fine to update the thread state here because no JVMTI events
1465 // shall be posted for this PopFrame.
1466
1467 // It is only safe to perform the direct operation on the current
1468 // thread. All other usage needs to use a vm-safepoint-op for safety.
1469 if (java_thread == JavaThread::current()) {
1470 state->update_for_pop_top_frame();
1471 } else {
1472 VM_UpdateForPopTopFrame op(state);
1473 VMThread::execute(&op);
1474 jvmtiError err = op.result();
1475 if (err != JVMTI_ERROR_NONE) {
1476 return err;
1477 }
1478 }
1479
1480 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1481 // Set pending step flag for this popframe and it is cleared when next
1482 // step event is posted.
1483 state->set_pending_step_for_popframe();
1484 }
1485
1486 return JVMTI_ERROR_NONE;
1487 } /* end PopFrame */
1488
1489
1490 // Threads_lock NOT held, java_thread not protected by lock
1491 // java_thread - pre-checked
1492 // java_thread - unchecked
1493 // depth - pre-checked as non-negative
1494 // method_ptr - pre-checked for NULL
1495 // location_ptr - pre-checked for NULL
1496 jvmtiError
1497 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1498 jvmtiError err = JVMTI_ERROR_NONE;
1499
1500 // It is only safe to perform the direct operation on the current
1501 // thread. All other usage needs to use a vm-safepoint-op for safety.
1502 if (java_thread == JavaThread::current()) {
1503 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1504 } else {
1505 // JVMTI get java stack frame location at safepoint.
1506 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1507 VMThread::execute(&op);
1508 err = op.result();
1509 }
1510 return err;
1511 } /* end GetFrameLocation */
1512
1513
1514 // Threads_lock NOT held, java_thread not protected by lock
1515 // java_thread - pre-checked
1516 // java_thread - unchecked
1517 // depth - pre-checked as non-negative
1518 jvmtiError
1519 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1520 jvmtiError err = JVMTI_ERROR_NONE;
1521 ResourceMark rm;
1522 uint32_t debug_bits = 0;
1523
1524 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1525 if (state == NULL) {
1526 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1527 }
1528
1529 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1530 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1531 }
1532
1533 if (TraceJVMTICalls) {
1534 JvmtiSuspendControl::print();
1535 }
1536
1537 vframe *vf = vframeFor(java_thread, depth);
1538 if (vf == NULL) {
1539 return JVMTI_ERROR_NO_MORE_FRAMES;
1540 }
1541
1542 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1543 return JVMTI_ERROR_OPAQUE_FRAME;
1544 }
1545
1546 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1547
1548 // It is only safe to perform the direct operation on the current
1549 // thread. All other usage needs to use a vm-safepoint-op for safety.
1550 if (java_thread == JavaThread::current()) {
1551 int frame_number = state->count_frames() - depth;
1552 state->env_thread_state(this)->set_frame_pop(frame_number);
1553 } else {
1554 VM_SetFramePop op(this, state, depth);
1555 VMThread::execute(&op);
1556 err = op.result();
1557 }
1558 return err;
1559 } /* end NotifyFramePop */
1560
1561
1562 //
1563 // Force Early Return functions
1564 //
1565
1566 // Threads_lock NOT held, java_thread not protected by lock
1567 // java_thread - pre-checked
1568 jvmtiError
1569 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1570 jvalue val;
1571 val.l = value;
1572 return force_early_return(java_thread, val, atos);
1573 } /* end ForceEarlyReturnObject */
1574
1575
1576 // Threads_lock NOT held, java_thread not protected by lock
1577 // java_thread - pre-checked
1578 jvmtiError
1579 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1580 jvalue val;
1581 val.i = value;
1582 return force_early_return(java_thread, val, itos);
1583 } /* end ForceEarlyReturnInt */
1584
1585
1586 // Threads_lock NOT held, java_thread not protected by lock
1587 // java_thread - pre-checked
1588 jvmtiError
1589 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1590 jvalue val;
1591 val.j = value;
1592 return force_early_return(java_thread, val, ltos);
1593 } /* end ForceEarlyReturnLong */
1594
1595
1596 // Threads_lock NOT held, java_thread not protected by lock
1597 // java_thread - pre-checked
1598 jvmtiError
1599 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1600 jvalue val;
1601 val.f = value;
1602 return force_early_return(java_thread, val, ftos);
1603 } /* end ForceEarlyReturnFloat */
1604
1605
1606 // Threads_lock NOT held, java_thread not protected by lock
1607 // java_thread - pre-checked
1608 jvmtiError
1609 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1610 jvalue val;
1611 val.d = value;
1612 return force_early_return(java_thread, val, dtos);
1613 } /* end ForceEarlyReturnDouble */
1614
1615
1616 // Threads_lock NOT held, java_thread not protected by lock
1617 // java_thread - pre-checked
1618 jvmtiError
1619 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1620 jvalue val;
1621 val.j = 0L;
1622 return force_early_return(java_thread, val, vtos);
1623 } /* end ForceEarlyReturnVoid */
1624
1625
1626 //
1627 // Heap functions
1628 //
1629
1630 // klass - NULL is a valid value, must be checked
1631 // initial_object - NULL is a valid value, must be checked
1632 // callbacks - pre-checked for NULL
1633 // user_data - NULL is a valid value, must be checked
1634 jvmtiError
1635 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1636 // check klass if provided
1637 Klass* k_oop = NULL;
1638 if (klass != NULL) {
1639 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1640 if (k_mirror == NULL) {
1641 return JVMTI_ERROR_INVALID_CLASS;
1642 }
1643 if (java_lang_Class::is_primitive(k_mirror)) {
1644 return JVMTI_ERROR_NONE;
1645 }
1646 k_oop = java_lang_Class::as_Klass(k_mirror);
1647 if (k_oop == NULL) {
1648 return JVMTI_ERROR_INVALID_CLASS;
1649 }
1650 }
1651
1652 Thread *thread = Thread::current();
1653 HandleMark hm(thread);
1654 KlassHandle kh (thread, k_oop);
1655
1656 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1657 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1658 return JVMTI_ERROR_NONE;
1659 } /* end FollowReferences */
1660
1661
1662 // klass - NULL is a valid value, must be checked
1663 // callbacks - pre-checked for NULL
1664 // user_data - NULL is a valid value, must be checked
1665 jvmtiError
1666 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1667 // check klass if provided
1668 Klass* k_oop = NULL;
1669 if (klass != NULL) {
1670 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1671 if (k_mirror == NULL) {
1672 return JVMTI_ERROR_INVALID_CLASS;
1673 }
1674 if (java_lang_Class::is_primitive(k_mirror)) {
1675 return JVMTI_ERROR_NONE;
1676 }
1677 k_oop = java_lang_Class::as_Klass(k_mirror);
1678 if (k_oop == NULL) {
1679 return JVMTI_ERROR_INVALID_CLASS;
1680 }
1681 }
1682
1683 Thread *thread = Thread::current();
1684 HandleMark hm(thread);
1685 KlassHandle kh (thread, k_oop);
1686
1687 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1688 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1689 return JVMTI_ERROR_NONE;
1690 } /* end IterateThroughHeap */
1691
1692
1693 // tag_ptr - pre-checked for NULL
1694 jvmtiError
1695 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1696 oop o = JNIHandles::resolve_external_guard(object);
1697 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1698 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1699 return JVMTI_ERROR_NONE;
1700 } /* end GetTag */
1701
1702
1703 jvmtiError
1704 JvmtiEnv::SetTag(jobject object, jlong tag) {
1705 oop o = JNIHandles::resolve_external_guard(object);
1706 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1707 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1708 return JVMTI_ERROR_NONE;
1709 } /* end SetTag */
1710
1711
1712 // tag_count - pre-checked to be greater than or equal to 0
1713 // tags - pre-checked for NULL
1714 // count_ptr - pre-checked for NULL
1715 // object_result_ptr - NULL is a valid value, must be checked
1716 // tag_result_ptr - NULL is a valid value, must be checked
1717 jvmtiError
1718 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1719 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1720 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1721 } /* end GetObjectsWithTags */
1722
1723
1724 jvmtiError
1725 JvmtiEnv::ForceGarbageCollection() {
1726 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1727 return JVMTI_ERROR_NONE;
1728 } /* end ForceGarbageCollection */
1729
1730
1731 //
1732 // Heap (1.0) functions
1733 //
1734
1735 // object_reference_callback - pre-checked for NULL
1736 // user_data - NULL is a valid value, must be checked
1737 jvmtiError
1738 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1739 oop o = JNIHandles::resolve_external_guard(object);
1740 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1741 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1742 return JVMTI_ERROR_NONE;
1743 } /* end IterateOverObjectsReachableFromObject */
1744
1745
1746 // heap_root_callback - NULL is a valid value, must be checked
1747 // stack_ref_callback - NULL is a valid value, must be checked
1748 // object_ref_callback - NULL is a valid value, must be checked
1749 // user_data - NULL is a valid value, must be checked
1750 jvmtiError
1751 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1752 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1753 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1754 return JVMTI_ERROR_NONE;
1755 } /* end IterateOverReachableObjects */
1756
1757
1758 // heap_object_callback - pre-checked for NULL
1759 // user_data - NULL is a valid value, must be checked
1760 jvmtiError
1761 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1762 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1763 Thread *thread = Thread::current();
1764 HandleMark hm(thread);
1765 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1766 return JVMTI_ERROR_NONE;
1767 } /* end IterateOverHeap */
1768
1769
1770 // k_mirror - may be primitive, this must be checked
1771 // heap_object_callback - pre-checked for NULL
1772 // user_data - NULL is a valid value, must be checked
1773 jvmtiError
1774 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1775 if (java_lang_Class::is_primitive(k_mirror)) {
1776 // DO PRIMITIVE CLASS PROCESSING
1777 return JVMTI_ERROR_NONE;
1778 }
1779 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1780 if (k_oop == NULL) {
1781 return JVMTI_ERROR_INVALID_CLASS;
1782 }
1783 Thread *thread = Thread::current();
1784 HandleMark hm(thread);
1785 KlassHandle klass (thread, k_oop);
1786 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1787 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1788 return JVMTI_ERROR_NONE;
1789 } /* end IterateOverInstancesOfClass */
1790
1791
1792 //
1793 // Local Variable functions
1794 //
1795
1796 // Threads_lock NOT held, java_thread not protected by lock
1797 // java_thread - pre-checked
1798 // java_thread - unchecked
1799 // depth - pre-checked as non-negative
1800 // value_ptr - pre-checked for NULL
1801 jvmtiError
1802 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1803 JavaThread* current_thread = JavaThread::current();
1804 // rm object is created to clean up the javaVFrame created in
1805 // doit_prologue(), but after doit() is finished with it.
1806 ResourceMark rm(current_thread);
1807
1808 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1809 VMThread::execute(&op);
1810 jvmtiError err = op.result();
1811 if (err != JVMTI_ERROR_NONE) {
1812 return err;
1813 } else {
1814 *value_ptr = op.value().l;
1815 return JVMTI_ERROR_NONE;
1816 }
1817 } /* end GetLocalObject */
1818
1819 // Threads_lock NOT held, java_thread not protected by lock
1820 // java_thread - pre-checked
1821 // java_thread - unchecked
1822 // depth - pre-checked as non-negative
1823 // value - pre-checked for NULL
1824 jvmtiError
1825 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1826 JavaThread* current_thread = JavaThread::current();
1827 // rm object is created to clean up the javaVFrame created in
1828 // doit_prologue(), but after doit() is finished with it.
1829 ResourceMark rm(current_thread);
1830
1831 VM_GetReceiver op(java_thread, current_thread, depth);
1832 VMThread::execute(&op);
1833 jvmtiError err = op.result();
1834 if (err != JVMTI_ERROR_NONE) {
1835 return err;
1836 } else {
1837 *value_ptr = op.value().l;
1838 return JVMTI_ERROR_NONE;
1839 }
1840 } /* end GetLocalInstance */
1841
1842
1843 // Threads_lock NOT held, java_thread not protected by lock
1844 // java_thread - pre-checked
1845 // java_thread - unchecked
1846 // depth - pre-checked as non-negative
1847 // value_ptr - pre-checked for NULL
1848 jvmtiError
1849 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1850 // rm object is created to clean up the javaVFrame created in
1851 // doit_prologue(), but after doit() is finished with it.
1852 ResourceMark rm;
1853
1854 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1855 VMThread::execute(&op);
1856 *value_ptr = op.value().i;
1857 return op.result();
1858 } /* end GetLocalInt */
1859
1860
1861 // Threads_lock NOT held, java_thread not protected by lock
1862 // java_thread - pre-checked
1863 // java_thread - unchecked
1864 // depth - pre-checked as non-negative
1865 // value_ptr - pre-checked for NULL
1866 jvmtiError
1867 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1868 // rm object is created to clean up the javaVFrame created in
1869 // doit_prologue(), but after doit() is finished with it.
1870 ResourceMark rm;
1871
1872 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1873 VMThread::execute(&op);
1874 *value_ptr = op.value().j;
1875 return op.result();
1876 } /* end GetLocalLong */
1877
1878
1879 // Threads_lock NOT held, java_thread not protected by lock
1880 // java_thread - pre-checked
1881 // java_thread - unchecked
1882 // depth - pre-checked as non-negative
1883 // value_ptr - pre-checked for NULL
1884 jvmtiError
1885 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1886 // rm object is created to clean up the javaVFrame created in
1887 // doit_prologue(), but after doit() is finished with it.
1888 ResourceMark rm;
1889
1890 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1891 VMThread::execute(&op);
1892 *value_ptr = op.value().f;
1893 return op.result();
1894 } /* end GetLocalFloat */
1895
1896
1897 // Threads_lock NOT held, java_thread not protected by lock
1898 // java_thread - pre-checked
1899 // java_thread - unchecked
1900 // depth - pre-checked as non-negative
1901 // value_ptr - pre-checked for NULL
1902 jvmtiError
1903 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1904 // rm object is created to clean up the javaVFrame created in
1905 // doit_prologue(), but after doit() is finished with it.
1906 ResourceMark rm;
1907
1908 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1909 VMThread::execute(&op);
1910 *value_ptr = op.value().d;
1911 return op.result();
1912 } /* end GetLocalDouble */
1913
1914
1915 // Threads_lock NOT held, java_thread not protected by lock
1916 // java_thread - pre-checked
1917 // java_thread - unchecked
1918 // depth - pre-checked as non-negative
1919 jvmtiError
1920 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1921 // rm object is created to clean up the javaVFrame created in
1922 // doit_prologue(), but after doit() is finished with it.
1923 ResourceMark rm;
1924 jvalue val;
1925 val.l = value;
1926 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1927 VMThread::execute(&op);
1928 return op.result();
1929 } /* end SetLocalObject */
1930
1931
1932 // Threads_lock NOT held, java_thread not protected by lock
1933 // java_thread - pre-checked
1934 // java_thread - unchecked
1935 // depth - pre-checked as non-negative
1936 jvmtiError
1937 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1938 // rm object is created to clean up the javaVFrame created in
1939 // doit_prologue(), but after doit() is finished with it.
1940 ResourceMark rm;
1941 jvalue val;
1942 val.i = value;
1943 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1944 VMThread::execute(&op);
1945 return op.result();
1946 } /* end SetLocalInt */
1947
1948
1949 // Threads_lock NOT held, java_thread not protected by lock
1950 // java_thread - pre-checked
1951 // java_thread - unchecked
1952 // depth - pre-checked as non-negative
1953 jvmtiError
1954 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1955 // rm object is created to clean up the javaVFrame created in
1956 // doit_prologue(), but after doit() is finished with it.
1957 ResourceMark rm;
1958 jvalue val;
1959 val.j = value;
1960 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1961 VMThread::execute(&op);
1962 return op.result();
1963 } /* end SetLocalLong */
1964
1965
1966 // Threads_lock NOT held, java_thread not protected by lock
1967 // java_thread - pre-checked
1968 // java_thread - unchecked
1969 // depth - pre-checked as non-negative
1970 jvmtiError
1971 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1972 // rm object is created to clean up the javaVFrame created in
1973 // doit_prologue(), but after doit() is finished with it.
1974 ResourceMark rm;
1975 jvalue val;
1976 val.f = value;
1977 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1978 VMThread::execute(&op);
1979 return op.result();
1980 } /* end SetLocalFloat */
1981
1982
1983 // Threads_lock NOT held, java_thread not protected by lock
1984 // java_thread - pre-checked
1985 // java_thread - unchecked
1986 // depth - pre-checked as non-negative
1987 jvmtiError
1988 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1989 // rm object is created to clean up the javaVFrame created in
1990 // doit_prologue(), but after doit() is finished with it.
1991 ResourceMark rm;
1992 jvalue val;
1993 val.d = value;
1994 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
1995 VMThread::execute(&op);
1996 return op.result();
1997 } /* end SetLocalDouble */
1998
1999
2000 //
2001 // Breakpoint functions
2002 //
2003
2004 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2005 jvmtiError
2006 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2007 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2008 if (location < 0) { // simple invalid location check first
2009 return JVMTI_ERROR_INVALID_LOCATION;
2010 }
2011 // verify that the breakpoint is not past the end of the method
2012 if (location >= (jlocation) method_oop->code_size()) {
2013 return JVMTI_ERROR_INVALID_LOCATION;
2014 }
2015
2016 ResourceMark rm;
2017 JvmtiBreakpoint bp(method_oop, location);
2018 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2019 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2020 return JVMTI_ERROR_DUPLICATE;
2021
2022 if (TraceJVMTICalls) {
2023 jvmti_breakpoints.print();
2024 }
2025
2026 return JVMTI_ERROR_NONE;
2027 } /* end SetBreakpoint */
2028
2029
2030 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2031 jvmtiError
2032 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2033 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2034
2035 if (location < 0) { // simple invalid location check first
2036 return JVMTI_ERROR_INVALID_LOCATION;
2037 }
2038
2039 // verify that the breakpoint is not past the end of the method
2040 if (location >= (jlocation) method_oop->code_size()) {
2041 return JVMTI_ERROR_INVALID_LOCATION;
2042 }
2043
2044 JvmtiBreakpoint bp(method_oop, location);
2045
2046 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2047 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2048 return JVMTI_ERROR_NOT_FOUND;
2049
2050 if (TraceJVMTICalls) {
2051 jvmti_breakpoints.print();
2052 }
2053
2054 return JVMTI_ERROR_NONE;
2055 } /* end ClearBreakpoint */
2056
2057
2058 //
2059 // Watched Field functions
2060 //
2061
2062 jvmtiError
2063 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2064 // make sure we haven't set this watch before
2065 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2066 fdesc_ptr->set_is_field_access_watched(true);
2067
2068 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2069
2070 return JVMTI_ERROR_NONE;
2071 } /* end SetFieldAccessWatch */
2072
2073
2074 jvmtiError
2075 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2076 // make sure we have a watch to clear
2077 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2078 fdesc_ptr->set_is_field_access_watched(false);
2079
2080 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2081
2082 return JVMTI_ERROR_NONE;
2083 } /* end ClearFieldAccessWatch */
2084
2085
2086 jvmtiError
2087 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2088 // make sure we haven't set this watch before
2089 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2090 fdesc_ptr->set_is_field_modification_watched(true);
2091
2092 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2093
2094 return JVMTI_ERROR_NONE;
2095 } /* end SetFieldModificationWatch */
2096
2097
2098 jvmtiError
2099 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2100 // make sure we have a watch to clear
2101 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2102 fdesc_ptr->set_is_field_modification_watched(false);
2103
2104 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2105
2106 return JVMTI_ERROR_NONE;
2107 } /* end ClearFieldModificationWatch */
2108
2109 //
2110 // Class functions
2111 //
2112
2113
2114 // k_mirror - may be primitive, this must be checked
2115 // signature_ptr - NULL is a valid value, must be checked
2116 // generic_ptr - NULL is a valid value, must be checked
2117 jvmtiError
2118 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2119 ResourceMark rm;
2120 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2121 Klass* k = NULL;
2122 if (!isPrimitive) {
2123 k = java_lang_Class::as_Klass(k_mirror);
2124 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2125 }
2126 if (signature_ptr != NULL) {
2127 char* result = NULL;
2128 if (isPrimitive) {
2129 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2130 result = (char*) jvmtiMalloc(2);
2131 result[0] = tchar;
2132 result[1] = '\0';
2133 } else {
2134 const char* class_sig = k->signature_name();
2135 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2136 strcpy(result, class_sig);
2137 }
2138 *signature_ptr = result;
2139 }
2140 if (generic_ptr != NULL) {
2141 *generic_ptr = NULL;
2142 if (!isPrimitive && k->oop_is_instance()) {
2143 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2144 if (soo != NULL) {
2145 const char *gen_sig = soo->as_C_string();
2146 if (gen_sig != NULL) {
2147 char* gen_result;
2148 jvmtiError err = allocate(strlen(gen_sig) + 1,
2149 (unsigned char **)&gen_result);
2150 if (err != JVMTI_ERROR_NONE) {
2151 return err;
2152 }
2153 strcpy(gen_result, gen_sig);
2154 *generic_ptr = gen_result;
2155 }
2156 }
2157 }
2158 }
2159 return JVMTI_ERROR_NONE;
2160 } /* end GetClassSignature */
2161
2162
2163 // k_mirror - may be primitive, this must be checked
2164 // status_ptr - pre-checked for NULL
2165 jvmtiError
2166 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2167 jint result = 0;
2168 if (java_lang_Class::is_primitive(k_mirror)) {
2169 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2170 } else {
2171 Klass* k = java_lang_Class::as_Klass(k_mirror);
2172 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2173 result = k->jvmti_class_status();
2174 }
2175 *status_ptr = result;
2176
2177 return JVMTI_ERROR_NONE;
2178 } /* end GetClassStatus */
2179
2180
2181 // k_mirror - may be primitive, this must be checked
2182 // source_name_ptr - pre-checked for NULL
2183 jvmtiError
2184 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2185 if (java_lang_Class::is_primitive(k_mirror)) {
2186 return JVMTI_ERROR_ABSENT_INFORMATION;
2187 }
2188 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2189 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2190
2191 if (!k_klass->oop_is_instance()) {
2192 return JVMTI_ERROR_ABSENT_INFORMATION;
2193 }
2194
2195 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2196 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2197 {
2198 JavaThread* current_thread = JavaThread::current();
2199 ResourceMark rm(current_thread);
2200 const char* sfncp = (const char*) sfnOop->as_C_string();
2201 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2202 strcpy(*source_name_ptr, sfncp);
2203 }
2204
2205 return JVMTI_ERROR_NONE;
2206 } /* end GetSourceFileName */
2207
2208
2209 // k_mirror - may be primitive, this must be checked
2210 // modifiers_ptr - pre-checked for NULL
2211 jvmtiError
2212 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2213 JavaThread* current_thread = JavaThread::current();
2214 jint result = 0;
2215 if (!java_lang_Class::is_primitive(k_mirror)) {
2216 Klass* k = java_lang_Class::as_Klass(k_mirror);
2217 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2218 result = k->compute_modifier_flags(current_thread);
2219 JavaThread* THREAD = current_thread; // pass to macros
2220 if (HAS_PENDING_EXCEPTION) {
2221 CLEAR_PENDING_EXCEPTION;
2222 return JVMTI_ERROR_INTERNAL;
2223 };
2224
2225 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2226 if(k->is_super()) {
2227 result |= JVM_ACC_SUPER;
2228 }
2229 } else {
2230 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2231 }
2232 *modifiers_ptr = result;
2233
2234 return JVMTI_ERROR_NONE;
2235 } /* end GetClassModifiers */
2236
2237
2238 // k_mirror - may be primitive, this must be checked
2239 // method_count_ptr - pre-checked for NULL
2240 // methods_ptr - pre-checked for NULL
2241 jvmtiError
2242 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2243 JavaThread* current_thread = JavaThread::current();
2244 HandleMark hm(current_thread);
2245
2246 if (java_lang_Class::is_primitive(k_mirror)) {
2247 *method_count_ptr = 0;
2248 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2249 return JVMTI_ERROR_NONE;
2250 }
2251 Klass* k = java_lang_Class::as_Klass(k_mirror);
2252 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2253
2254 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2255 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2256 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2257 }
2258
2259 if (!k->oop_is_instance()) {
2260 *method_count_ptr = 0;
2261 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2262 return JVMTI_ERROR_NONE;
2263 }
2264 instanceKlassHandle instanceK_h(current_thread, k);
2265 // Allocate the result and fill it in
2266 int result_length = instanceK_h->methods()->length();
2267 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2268 int index;
2269 if (JvmtiExport::can_maintain_original_method_order()) {
2270 // Use the original method ordering indices stored in the class, so we can emit
2271 // jmethodIDs in the order they appeared in the class file
2272 for (index = 0; index < result_length; index++) {
2273 Method* m = instanceK_h->methods()->at(index);
2274 int original_index = instanceK_h->method_ordering()->at(index);
2275 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2276 jmethodID id = m->jmethod_id();
2277 result_list[original_index] = id;
2278 }
2279 } else {
2280 // otherwise just copy in any order
2281 for (index = 0; index < result_length; index++) {
2282 Method* m = instanceK_h->methods()->at(index);
2283 jmethodID id = m->jmethod_id();
2284 result_list[index] = id;
2285 }
2286 }
2287 // Fill in return value.
2288 *method_count_ptr = result_length;
2289 *methods_ptr = result_list;
2290
2291 return JVMTI_ERROR_NONE;
2292 } /* end GetClassMethods */
2293
2294
2295 // k_mirror - may be primitive, this must be checked
2296 // field_count_ptr - pre-checked for NULL
2297 // fields_ptr - pre-checked for NULL
2298 jvmtiError
2299 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2300 if (java_lang_Class::is_primitive(k_mirror)) {
2301 *field_count_ptr = 0;
2302 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2303 return JVMTI_ERROR_NONE;
2304 }
2305 JavaThread* current_thread = JavaThread::current();
2306 HandleMark hm(current_thread);
2307 Klass* k = java_lang_Class::as_Klass(k_mirror);
2308 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2309
2310 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2311 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2312 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2313 }
2314
2315 if (!k->oop_is_instance()) {
2316 *field_count_ptr = 0;
2317 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2318 return JVMTI_ERROR_NONE;
2319 }
2320
2321
2322 instanceKlassHandle instanceK_h(current_thread, k);
2323
2324 int result_count = 0;
2325 // First, count the fields.
2326 FilteredFieldStream flds(instanceK_h, true, true);
2327 result_count = flds.field_count();
2328
2329 // Allocate the result and fill it in
2330 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2331 // The JVMTI spec requires fields in the order they occur in the class file,
2332 // this is the reverse order of what FieldStream hands out.
2333 int id_index = (result_count - 1);
2334
2335 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2336 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2337 instanceK_h, src_st.offset(),
2338 src_st.access_flags().is_static());
2339 }
2340 assert(id_index == -1, "just checking");
2341 // Fill in the results
2342 *field_count_ptr = result_count;
2343 *fields_ptr = result_list;
2344
2345 return JVMTI_ERROR_NONE;
2346 } /* end GetClassFields */
2347
2348
2349 // k_mirror - may be primitive, this must be checked
2350 // interface_count_ptr - pre-checked for NULL
2351 // interfaces_ptr - pre-checked for NULL
2352 jvmtiError
2353 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2354 {
2355 if (java_lang_Class::is_primitive(k_mirror)) {
2356 *interface_count_ptr = 0;
2357 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2358 return JVMTI_ERROR_NONE;
2359 }
2360 JavaThread* current_thread = JavaThread::current();
2361 HandleMark hm(current_thread);
2362 Klass* k = java_lang_Class::as_Klass(k_mirror);
2363 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2364
2365 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2366 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2367 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2368
2369 if (!k->oop_is_instance()) {
2370 *interface_count_ptr = 0;
2371 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2372 return JVMTI_ERROR_NONE;
2373 }
2374
2375 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2376 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2377 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2378 for (int i_index = 0; i_index < result_length; i_index += 1) {
2379 Klass* klass_at = interface_list->at(i_index);
2380 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2381 assert(klass_at->is_interface(), "interfaces must be interfaces");
2382 oop mirror_at = klass_at->java_mirror();
2383 Handle handle_at = Handle(current_thread, mirror_at);
2384 result_list[i_index] = (jclass) jni_reference(handle_at);
2385 }
2386 *interface_count_ptr = result_length;
2387 *interfaces_ptr = result_list;
2388 }
2389
2390 return JVMTI_ERROR_NONE;
2391 } /* end GetImplementedInterfaces */
2392
2393
2394 // k_mirror - may be primitive, this must be checked
2395 // minor_version_ptr - pre-checked for NULL
2396 // major_version_ptr - pre-checked for NULL
2397 jvmtiError
2398 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2399 if (java_lang_Class::is_primitive(k_mirror)) {
2400 return JVMTI_ERROR_ABSENT_INFORMATION;
2401 }
2402 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2403 Thread *thread = Thread::current();
2404 HandleMark hm(thread);
2405 KlassHandle klass(thread, k_oop);
2406
2407 jint status = klass->jvmti_class_status();
2408 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2409 return JVMTI_ERROR_INVALID_CLASS;
2410 }
2411 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2412 return JVMTI_ERROR_ABSENT_INFORMATION;
2413 }
2414
2415 instanceKlassHandle ik(thread, k_oop);
2416 *minor_version_ptr = ik->minor_version();
2417 *major_version_ptr = ik->major_version();
2418
2419 return JVMTI_ERROR_NONE;
2420 } /* end GetClassVersionNumbers */
2421
2422
2423 // k_mirror - may be primitive, this must be checked
2424 // constant_pool_count_ptr - pre-checked for NULL
2425 // constant_pool_byte_count_ptr - pre-checked for NULL
2426 // constant_pool_bytes_ptr - pre-checked for NULL
2427 jvmtiError
2428 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2429 if (java_lang_Class::is_primitive(k_mirror)) {
2430 return JVMTI_ERROR_ABSENT_INFORMATION;
2431 }
2432
2433 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2434 Thread *thread = Thread::current();
2435 HandleMark hm(thread);
2436 ResourceMark rm(thread);
2437 KlassHandle klass(thread, k_oop);
2438
2439 jint status = klass->jvmti_class_status();
2440 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2441 return JVMTI_ERROR_INVALID_CLASS;
2442 }
2443 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2444 return JVMTI_ERROR_ABSENT_INFORMATION;
2445 }
2446
2447 instanceKlassHandle ikh(thread, k_oop);
2448 constantPoolHandle constants(thread, ikh->constants());
2449 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
2450
2451 JvmtiConstantPoolReconstituter reconstituter(ikh);
2452 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2453 return reconstituter.get_error();
2454 }
2455
2456 unsigned char *cpool_bytes;
2457 int cpool_size = reconstituter.cpool_size();
2458 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2459 return reconstituter.get_error();
2460 }
2461 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2462 if (res != JVMTI_ERROR_NONE) {
2463 return res;
2464 }
2465 reconstituter.copy_cpool_bytes(cpool_bytes);
2466 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2467 return reconstituter.get_error();
2468 }
2469
2470 *constant_pool_count_ptr = constants->length();
2471 *constant_pool_byte_count_ptr = cpool_size;
2472 *constant_pool_bytes_ptr = cpool_bytes;
2473
2474 return JVMTI_ERROR_NONE;
2475 } /* end GetConstantPool */
2476
2477
2478 // k_mirror - may be primitive, this must be checked
2479 // is_interface_ptr - pre-checked for NULL
2480 jvmtiError
2481 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2482 {
2483 bool result = false;
2484 if (!java_lang_Class::is_primitive(k_mirror)) {
2485 Klass* k = java_lang_Class::as_Klass(k_mirror);
2486 if (k != NULL && k->is_interface()) {
2487 result = true;
2488 }
2489 }
2490 *is_interface_ptr = result;
2491 }
2492
2493 return JVMTI_ERROR_NONE;
2494 } /* end IsInterface */
2495
2496
2497 // k_mirror - may be primitive, this must be checked
2498 // is_array_class_ptr - pre-checked for NULL
2499 jvmtiError
2500 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2501 {
2502 bool result = false;
2503 if (!java_lang_Class::is_primitive(k_mirror)) {
2504 Klass* k = java_lang_Class::as_Klass(k_mirror);
2505 if (k != NULL && k->oop_is_array()) {
2506 result = true;
2507 }
2508 }
2509 *is_array_class_ptr = result;
2510 }
2511
2512 return JVMTI_ERROR_NONE;
2513 } /* end IsArrayClass */
2514
2515
2516 // k_mirror - may be primitive, this must be checked
2517 // classloader_ptr - pre-checked for NULL
2518 jvmtiError
2519 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2520 {
2521 if (java_lang_Class::is_primitive(k_mirror)) {
2522 *classloader_ptr = (jclass) jni_reference(Handle());
2523 return JVMTI_ERROR_NONE;
2524 }
2525 JavaThread* current_thread = JavaThread::current();
2526 HandleMark hm(current_thread);
2527 Klass* k = java_lang_Class::as_Klass(k_mirror);
2528 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2529
2530 oop result_oop = k->class_loader();
2531 if (result_oop == NULL) {
2532 *classloader_ptr = (jclass) jni_reference(Handle());
2533 return JVMTI_ERROR_NONE;
2534 }
2535 Handle result_handle = Handle(current_thread, result_oop);
2536 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2537 *classloader_ptr = result_jnihandle;
2538 }
2539 return JVMTI_ERROR_NONE;
2540 } /* end GetClassLoader */
2541
2542
2543 // k_mirror - may be primitive, this must be checked
2544 // source_debug_extension_ptr - pre-checked for NULL
2545 jvmtiError
2546 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2547 {
2548 if (java_lang_Class::is_primitive(k_mirror)) {
2549 return JVMTI_ERROR_ABSENT_INFORMATION;
2550 }
2551 Klass* k = java_lang_Class::as_Klass(k_mirror);
2552 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2553 if (!k->oop_is_instance()) {
2554 return JVMTI_ERROR_ABSENT_INFORMATION;
2555 }
2556 char* sde = InstanceKlass::cast(k)->source_debug_extension();
2557 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2558
2559 {
2560 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2561 strcpy(*source_debug_extension_ptr, sde);
2562 }
2563 }
2564
2565 return JVMTI_ERROR_NONE;
2566 } /* end GetSourceDebugExtension */
2567
2568 //
2569 // Object functions
2570 //
2571
2572 // hash_code_ptr - pre-checked for NULL
2573 jvmtiError
2574 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2575 oop mirror = JNIHandles::resolve_external_guard(object);
2576 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2577 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2578
2579 {
2580 jint result = (jint) mirror->identity_hash();
2581 *hash_code_ptr = result;
2582 }
2583 return JVMTI_ERROR_NONE;
2584 } /* end GetObjectHashCode */
2585
2586
2587 // info_ptr - pre-checked for NULL
2588 jvmtiError
2589 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2590 JavaThread* calling_thread = JavaThread::current();
2591 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2592 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2593 // Some of the critical threads were not suspended. go to a safepoint and try again
2594 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2595 VMThread::execute(&op);
2596 err = op.result();
2597 }
2598 return err;
2599 } /* end GetObjectMonitorUsage */
2600
2601
2602 //
2603 // Field functions
2604 //
2605
2606 // name_ptr - NULL is a valid value, must be checked
2607 // signature_ptr - NULL is a valid value, must be checked
2608 // generic_ptr - NULL is a valid value, must be checked
2609 jvmtiError
2610 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2611 JavaThread* current_thread = JavaThread::current();
2612 ResourceMark rm(current_thread);
2613 if (name_ptr == NULL) {
2614 // just don't return the name
2615 } else {
2616 const char* fieldName = fdesc_ptr->name()->as_C_string();
2617 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2618 if (*name_ptr == NULL)
2619 return JVMTI_ERROR_OUT_OF_MEMORY;
2620 strcpy(*name_ptr, fieldName);
2621 }
2622 if (signature_ptr== NULL) {
2623 // just don't return the signature
2624 } else {
2625 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2626 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2627 if (*signature_ptr == NULL)
2628 return JVMTI_ERROR_OUT_OF_MEMORY;
2629 strcpy(*signature_ptr, fieldSignature);
2630 }
2631 if (generic_ptr != NULL) {
2632 *generic_ptr = NULL;
2633 Symbol* soop = fdesc_ptr->generic_signature();
2634 if (soop != NULL) {
2635 const char* gen_sig = soop->as_C_string();
2636 if (gen_sig != NULL) {
2637 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2638 if (err != JVMTI_ERROR_NONE) {
2639 return err;
2640 }
2641 strcpy(*generic_ptr, gen_sig);
2642 }
2643 }
2644 }
2645 return JVMTI_ERROR_NONE;
2646 } /* end GetFieldName */
2647
2648
2649 // declaring_class_ptr - pre-checked for NULL
2650 jvmtiError
2651 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2652
2653 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2654 return JVMTI_ERROR_NONE;
2655 } /* end GetFieldDeclaringClass */
2656
2657
2658 // modifiers_ptr - pre-checked for NULL
2659 jvmtiError
2660 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2661
2662 AccessFlags resultFlags = fdesc_ptr->access_flags();
2663 jint result = resultFlags.as_int();
2664 *modifiers_ptr = result;
2665
2666 return JVMTI_ERROR_NONE;
2667 } /* end GetFieldModifiers */
2668
2669
2670 // is_synthetic_ptr - pre-checked for NULL
2671 jvmtiError
2672 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2673 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2674 return JVMTI_ERROR_NONE;
2675 } /* end IsFieldSynthetic */
2676
2677
2678 //
2679 // Method functions
2680 //
2681
2682 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2683 // name_ptr - NULL is a valid value, must be checked
2684 // signature_ptr - NULL is a valid value, must be checked
2685 // generic_ptr - NULL is a valid value, must be checked
2686 jvmtiError
2687 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2688 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2689 JavaThread* current_thread = JavaThread::current();
2690
2691 ResourceMark rm(current_thread); // get the utf8 name and signature
2692 if (name_ptr == NULL) {
2693 // just don't return the name
2694 } else {
2695 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2696 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2697 strcpy(*name_ptr, utf8_name);
2698 }
2699 if (signature_ptr == NULL) {
2700 // just don't return the signature
2701 } else {
2702 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2703 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2704 strcpy(*signature_ptr, utf8_signature);
2705 }
2706
2707 if (generic_ptr != NULL) {
2708 *generic_ptr = NULL;
2709 Symbol* soop = method_oop->generic_signature();
2710 if (soop != NULL) {
2711 const char* gen_sig = soop->as_C_string();
2712 if (gen_sig != NULL) {
2713 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2714 if (err != JVMTI_ERROR_NONE) {
2715 return err;
2716 }
2717 strcpy(*generic_ptr, gen_sig);
2718 }
2719 }
2720 }
2721 return JVMTI_ERROR_NONE;
2722 } /* end GetMethodName */
2723
2724
2725 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2726 // declaring_class_ptr - pre-checked for NULL
2727 jvmtiError
2728 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2729 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2730 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2731 return JVMTI_ERROR_NONE;
2732 } /* end GetMethodDeclaringClass */
2733
2734
2735 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2736 // modifiers_ptr - pre-checked for NULL
2737 jvmtiError
2738 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2739 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2740 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2741 return JVMTI_ERROR_NONE;
2742 } /* end GetMethodModifiers */
2743
2744
2745 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2746 // max_ptr - pre-checked for NULL
2747 jvmtiError
2748 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2749 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2750 // get max stack
2751 (*max_ptr) = method_oop->max_locals();
2752 return JVMTI_ERROR_NONE;
2753 } /* end GetMaxLocals */
2754
2755
2756 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2757 // size_ptr - pre-checked for NULL
2758 jvmtiError
2759 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2760 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2761 // get size of arguments
2762
2763 (*size_ptr) = method_oop->size_of_parameters();
2764 return JVMTI_ERROR_NONE;
2765 } /* end GetArgumentsSize */
2766
2767
2768 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2769 // entry_count_ptr - pre-checked for NULL
2770 // table_ptr - pre-checked for NULL
2771 jvmtiError
2772 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2773 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2774 if (!method_oop->has_linenumber_table()) {
2775 return (JVMTI_ERROR_ABSENT_INFORMATION);
2776 }
2777
2778 // The line number table is compressed so we don't know how big it is until decompressed.
2779 // Decompression is really fast so we just do it twice.
2780
2781 // Compute size of table
2782 jint num_entries = 0;
2783 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2784 while (stream.read_pair()) {
2785 num_entries++;
2786 }
2787 jvmtiLineNumberEntry *jvmti_table =
2788 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2789
2790 // Fill jvmti table
2791 if (num_entries > 0) {
2792 int index = 0;
2793 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2794 while (stream.read_pair()) {
2795 jvmti_table[index].start_location = (jlocation) stream.bci();
2796 jvmti_table[index].line_number = (jint) stream.line();
2797 index++;
2798 }
2799 assert(index == num_entries, "sanity check");
2800 }
2801
2802 // Set up results
2803 (*entry_count_ptr) = num_entries;
2804 (*table_ptr) = jvmti_table;
2805
2806 return JVMTI_ERROR_NONE;
2807 } /* end GetLineNumberTable */
2808
2809
2810 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2811 // start_location_ptr - pre-checked for NULL
2812 // end_location_ptr - pre-checked for NULL
2813 jvmtiError
2814 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2815
2816 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2817 // get start and end location
2818 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2819 if (method_oop->code_size() == 0) {
2820 // there is no code so there is no start location
2821 (*start_location_ptr) = (jlocation)(-1);
2822 } else {
2823 (*start_location_ptr) = (jlocation)(0);
2824 }
2825
2826 return JVMTI_ERROR_NONE;
2827 } /* end GetMethodLocation */
2828
2829
2830 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2831 // entry_count_ptr - pre-checked for NULL
2832 // table_ptr - pre-checked for NULL
2833 jvmtiError
2834 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2835
2836 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2837 JavaThread* current_thread = JavaThread::current();
2838
2839 // does the klass have any local variable information?
2840 InstanceKlass* ik = method_oop->method_holder();
2841 if (!ik->access_flags().has_localvariable_table()) {
2842 return (JVMTI_ERROR_ABSENT_INFORMATION);
2843 }
2844
2845 ConstantPool* constants = method_oop->constants();
2846 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2847
2848 // in the vm localvariable table representation, 6 consecutive elements in the table
2849 // represent a 6-tuple of shorts
2850 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2851 jint num_entries = method_oop->localvariable_table_length();
2852 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2853 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2854
2855 if (num_entries > 0) {
2856 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2857 for (int i = 0; i < num_entries; i++) {
2858 // get the 5 tuple information from the vm table
2859 jlocation start_location = (jlocation) table[i].start_bci;
2860 jint length = (jint) table[i].length;
2861 int name_index = (int) table[i].name_cp_index;
2862 int signature_index = (int) table[i].descriptor_cp_index;
2863 int generic_signature_index = (int) table[i].signature_cp_index;
2864 jint slot = (jint) table[i].slot;
2865
2866 // get utf8 name and signature
2867 char *name_buf = NULL;
2868 char *sig_buf = NULL;
2869 char *gen_sig_buf = NULL;
2870 {
2871 ResourceMark rm(current_thread);
2872
2873 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2874 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2875 strcpy(name_buf, utf8_name);
2876
2877 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2878 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2879 strcpy(sig_buf, utf8_signature);
2880
2881 if (generic_signature_index > 0) {
2882 const char *utf8_gen_sign = (const char *)
2883 constants->symbol_at(generic_signature_index)->as_utf8();
2884 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2885 strcpy(gen_sig_buf, utf8_gen_sign);
2886 }
2887 }
2888
2889 // fill in the jvmti local variable table
2890 jvmti_table[i].start_location = start_location;
2891 jvmti_table[i].length = length;
2892 jvmti_table[i].name = name_buf;
2893 jvmti_table[i].signature = sig_buf;
2894 jvmti_table[i].generic_signature = gen_sig_buf;
2895 jvmti_table[i].slot = slot;
2896 }
2897 }
2898
2899 // set results
2900 (*entry_count_ptr) = num_entries;
2901 (*table_ptr) = jvmti_table;
2902
2903 return JVMTI_ERROR_NONE;
2904 } /* end GetLocalVariableTable */
2905
2906
2907 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2908 // bytecode_count_ptr - pre-checked for NULL
2909 // bytecodes_ptr - pre-checked for NULL
2910 jvmtiError
2911 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2912 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2913
2914 HandleMark hm;
2915 methodHandle method(method_oop);
2916 jint size = (jint)method->code_size();
2917 jvmtiError err = allocate(size, bytecodes_ptr);
2918 if (err != JVMTI_ERROR_NONE) {
2919 return err;
2920 }
2921
2922 (*bytecode_count_ptr) = size;
2923 // get byte codes
2924 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2925
2926 return JVMTI_ERROR_NONE;
2927 } /* end GetBytecodes */
2928
2929
2930 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2931 // is_native_ptr - pre-checked for NULL
2932 jvmtiError
2933 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2934 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2935 (*is_native_ptr) = method_oop->is_native();
2936 return JVMTI_ERROR_NONE;
2937 } /* end IsMethodNative */
2938
2939
2940 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2941 // is_synthetic_ptr - pre-checked for NULL
2942 jvmtiError
2943 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
2944 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2945 (*is_synthetic_ptr) = method_oop->is_synthetic();
2946 return JVMTI_ERROR_NONE;
2947 } /* end IsMethodSynthetic */
2948
2949
2950 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2951 // is_obsolete_ptr - pre-checked for NULL
2952 jvmtiError
2953 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
2954 if (use_version_1_0_semantics() &&
2955 get_capabilities()->can_redefine_classes == 0) {
2956 // This JvmtiEnv requested version 1.0 semantics and this function
2957 // requires the can_redefine_classes capability in version 1.0 so
2958 // we need to return an error here.
2959 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2960 }
2961
2962 if (method_oop == NULL || method_oop->is_obsolete()) {
2963 *is_obsolete_ptr = true;
2964 } else {
2965 *is_obsolete_ptr = false;
2966 }
2967 return JVMTI_ERROR_NONE;
2968 } /* end IsMethodObsolete */
2969
2970 //
2971 // Raw Monitor functions
2972 //
2973
2974 // name - pre-checked for NULL
2975 // monitor_ptr - pre-checked for NULL
2976 jvmtiError
2977 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
2978 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
2979 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
2980
2981 *monitor_ptr = (jrawMonitorID)rmonitor;
2982
2983 return JVMTI_ERROR_NONE;
2984 } /* end CreateRawMonitor */
2985
2986
2987 // rmonitor - pre-checked for validity
2988 jvmtiError
2989 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
2990 if (Threads::number_of_threads() == 0) {
2991 // Remove this monitor from pending raw monitors list
2992 // if it has entered in onload or start phase.
2993 JvmtiPendingMonitors::destroy(rmonitor);
2994 } else {
2995 Thread* thread = Thread::current();
2996 if (rmonitor->is_entered(thread)) {
2997 // The caller owns this monitor which we are about to destroy.
2998 // We exit the underlying synchronization object so that the
2999 // "delete monitor" call below can work without an assertion
3000 // failure on systems that don't like destroying synchronization
3001 // objects that are locked.
3002 int r;
3003 intptr_t recursion = rmonitor->recursions();
3004 for (intptr_t i=0; i <= recursion; i++) {
3005 r = rmonitor->raw_exit(thread);
3006 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3007 if (r != ObjectMonitor::OM_OK) { // robustness
3008 return JVMTI_ERROR_INTERNAL;
3009 }
3010 }
3011 }
3012 if (rmonitor->owner() != NULL) {
3013 // The caller is trying to destroy a monitor that is locked by
3014 // someone else. While this is not forbidden by the JVMTI
3015 // spec, it will cause an assertion failure on systems that don't
3016 // like destroying synchronization objects that are locked.
3017 // We indicate a problem with the error return (and leak the
3018 // monitor's memory).
3019 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3020 }
3021 }
3022
3023 delete rmonitor;
3024
3025 return JVMTI_ERROR_NONE;
3026 } /* end DestroyRawMonitor */
3027
3028
3029 // rmonitor - pre-checked for validity
3030 jvmtiError
3031 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3032 if (Threads::number_of_threads() == 0) {
3033 // No JavaThreads exist so ObjectMonitor enter cannot be
3034 // used, add this raw monitor to the pending list.
3035 // The pending monitors will be actually entered when
3036 // the VM is setup.
3037 // See transition_pending_raw_monitors in create_vm()
3038 // in thread.cpp.
3039 JvmtiPendingMonitors::enter(rmonitor);
3040 } else {
3041 int r;
3042 Thread* thread = Thread::current();
3043
3044 if (thread->is_Java_thread()) {
3045 JavaThread* current_thread = (JavaThread*)thread;
3046
3047 #ifdef PROPER_TRANSITIONS
3048 // Not really unknown but ThreadInVMfromNative does more than we want
3049 ThreadInVMfromUnknown __tiv;
3050 {
3051 ThreadBlockInVM __tbivm(current_thread);
3052 r = rmonitor->raw_enter(current_thread);
3053 }
3054 #else
3055 /* Transition to thread_blocked without entering vm state */
3056 /* This is really evil. Normally you can't undo _thread_blocked */
3057 /* transitions like this because it would cause us to miss a */
3058 /* safepoint but since the thread was already in _thread_in_native */
3059 /* the thread is not leaving a safepoint safe state and it will */
3060 /* block when it tries to return from native. We can't safepoint */
3061 /* block in here because we could deadlock the vmthread. Blech. */
3062
3063 JavaThreadState state = current_thread->thread_state();
3064 assert(state == _thread_in_native, "Must be _thread_in_native");
3065 // frame should already be walkable since we are in native
3066 assert(!current_thread->has_last_Java_frame() ||
3067 current_thread->frame_anchor()->walkable(), "Must be walkable");
3068 current_thread->set_thread_state(_thread_blocked);
3069
3070 r = rmonitor->raw_enter(current_thread);
3071 // restore state, still at a safepoint safe state
3072 current_thread->set_thread_state(state);
3073
3074 #endif /* PROPER_TRANSITIONS */
3075 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3076 } else {
3077 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3078 r = rmonitor->raw_enter(thread);
3079 } else {
3080 ShouldNotReachHere();
3081 }
3082 }
3083
3084 if (r != ObjectMonitor::OM_OK) { // robustness
3085 return JVMTI_ERROR_INTERNAL;
3086 }
3087 }
3088 return JVMTI_ERROR_NONE;
3089 } /* end RawMonitorEnter */
3090
3091
3092 // rmonitor - pre-checked for validity
3093 jvmtiError
3094 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3095 jvmtiError err = JVMTI_ERROR_NONE;
3096
3097 if (Threads::number_of_threads() == 0) {
3098 // No JavaThreads exist so just remove this monitor from the pending list.
3099 // Bool value from exit is false if rmonitor is not in the list.
3100 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3101 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3102 }
3103 } else {
3104 int r;
3105 Thread* thread = Thread::current();
3106
3107 if (thread->is_Java_thread()) {
3108 JavaThread* current_thread = (JavaThread*)thread;
3109 #ifdef PROPER_TRANSITIONS
3110 // Not really unknown but ThreadInVMfromNative does more than we want
3111 ThreadInVMfromUnknown __tiv;
3112 #endif /* PROPER_TRANSITIONS */
3113 r = rmonitor->raw_exit(current_thread);
3114 } else {
3115 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3116 r = rmonitor->raw_exit(thread);
3117 } else {
3118 ShouldNotReachHere();
3119 }
3120 }
3121
3122 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3123 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3124 } else {
3125 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3126 if (r != ObjectMonitor::OM_OK) { // robustness
3127 err = JVMTI_ERROR_INTERNAL;
3128 }
3129 }
3130 }
3131 return err;
3132 } /* end RawMonitorExit */
3133
3134
3135 // rmonitor - pre-checked for validity
3136 jvmtiError
3137 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3138 int r;
3139 Thread* thread = Thread::current();
3140
3141 if (thread->is_Java_thread()) {
3142 JavaThread* current_thread = (JavaThread*)thread;
3143 #ifdef PROPER_TRANSITIONS
3144 // Not really unknown but ThreadInVMfromNative does more than we want
3145 ThreadInVMfromUnknown __tiv;
3146 {
3147 ThreadBlockInVM __tbivm(current_thread);
3148 r = rmonitor->raw_wait(millis, true, current_thread);
3149 }
3150 #else
3151 /* Transition to thread_blocked without entering vm state */
3152 /* This is really evil. Normally you can't undo _thread_blocked */
3153 /* transitions like this because it would cause us to miss a */
3154 /* safepoint but since the thread was already in _thread_in_native */
3155 /* the thread is not leaving a safepoint safe state and it will */
3156 /* block when it tries to return from native. We can't safepoint */
3157 /* block in here because we could deadlock the vmthread. Blech. */
3158
3159 JavaThreadState state = current_thread->thread_state();
3160 assert(state == _thread_in_native, "Must be _thread_in_native");
3161 // frame should already be walkable since we are in native
3162 assert(!current_thread->has_last_Java_frame() ||
3163 current_thread->frame_anchor()->walkable(), "Must be walkable");
3164 current_thread->set_thread_state(_thread_blocked);
3165
3166 r = rmonitor->raw_wait(millis, true, current_thread);
3167 // restore state, still at a safepoint safe state
3168 current_thread->set_thread_state(state);
3169
3170 #endif /* PROPER_TRANSITIONS */
3171 } else {
3172 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3173 r = rmonitor->raw_wait(millis, true, thread);
3174 } else {
3175 ShouldNotReachHere();
3176 }
3177 }
3178
3179 switch (r) {
3180 case ObjectMonitor::OM_INTERRUPTED:
3181 return JVMTI_ERROR_INTERRUPT;
3182 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3183 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3184 }
3185 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3186 if (r != ObjectMonitor::OM_OK) { // robustness
3187 return JVMTI_ERROR_INTERNAL;
3188 }
3189
3190 return JVMTI_ERROR_NONE;
3191 } /* end RawMonitorWait */
3192
3193
3194 // rmonitor - pre-checked for validity
3195 jvmtiError
3196 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3197 int r;
3198 Thread* thread = Thread::current();
3199
3200 if (thread->is_Java_thread()) {
3201 JavaThread* current_thread = (JavaThread*)thread;
3202 // Not really unknown but ThreadInVMfromNative does more than we want
3203 ThreadInVMfromUnknown __tiv;
3204 r = rmonitor->raw_notify(current_thread);
3205 } else {
3206 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3207 r = rmonitor->raw_notify(thread);
3208 } else {
3209 ShouldNotReachHere();
3210 }
3211 }
3212
3213 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3214 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3215 }
3216 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3217 if (r != ObjectMonitor::OM_OK) { // robustness
3218 return JVMTI_ERROR_INTERNAL;
3219 }
3220
3221 return JVMTI_ERROR_NONE;
3222 } /* end RawMonitorNotify */
3223
3224
3225 // rmonitor - pre-checked for validity
3226 jvmtiError
3227 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3228 int r;
3229 Thread* thread = Thread::current();
3230
3231 if (thread->is_Java_thread()) {
3232 JavaThread* current_thread = (JavaThread*)thread;
3233 ThreadInVMfromUnknown __tiv;
3234 r = rmonitor->raw_notifyAll(current_thread);
3235 } else {
3236 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3237 r = rmonitor->raw_notifyAll(thread);
3238 } else {
3239 ShouldNotReachHere();
3240 }
3241 }
3242
3243 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3244 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3245 }
3246 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3247 if (r != ObjectMonitor::OM_OK) { // robustness
3248 return JVMTI_ERROR_INTERNAL;
3249 }
3250
3251 return JVMTI_ERROR_NONE;
3252 } /* end RawMonitorNotifyAll */
3253
3254
3255 //
3256 // JNI Function Interception functions
3257 //
3258
3259
3260 // function_table - pre-checked for NULL
3261 jvmtiError
3262 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3263 // Copy jni function table at safepoint.
3264 VM_JNIFunctionTableCopier copier(function_table);
3265 VMThread::execute(&copier);
3266
3267 return JVMTI_ERROR_NONE;
3268 } /* end SetJNIFunctionTable */
3269
3270
3271 // function_table - pre-checked for NULL
3272 jvmtiError
3273 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3274 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3275 if (*function_table == NULL)
3276 return JVMTI_ERROR_OUT_OF_MEMORY;
3277 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3278 return JVMTI_ERROR_NONE;
3279 } /* end GetJNIFunctionTable */
3280
3281
3282 //
3283 // Event Management functions
3284 //
3285
3286 jvmtiError
3287 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3288 // can only generate two event types
3289 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3290 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3291 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3292 }
3293
3294 // for compiled_method_load events we must check that the environment
3295 // has the can_generate_compiled_method_load_events capability.
3296 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3297 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3298 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3299 }
3300 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3301 } else {
3302 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3303 }
3304
3305 } /* end GenerateEvents */
3306
3307
3308 //
3309 // Extension Mechanism functions
3310 //
3311
3312 // extension_count_ptr - pre-checked for NULL
3313 // extensions - pre-checked for NULL
3314 jvmtiError
3315 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3316 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3317 } /* end GetExtensionFunctions */
3318
3319
3320 // extension_count_ptr - pre-checked for NULL
3321 // extensions - pre-checked for NULL
3322 jvmtiError
3323 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3324 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3325 } /* end GetExtensionEvents */
3326
3327
3328 // callback - NULL is a valid value, must be checked
3329 jvmtiError
3330 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3331 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3332 } /* end SetExtensionEventCallback */
3333
3334 //
3335 // Timers functions
3336 //
3337
3338 // info_ptr - pre-checked for NULL
3339 jvmtiError
3340 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3341 os::current_thread_cpu_time_info(info_ptr);
3342 return JVMTI_ERROR_NONE;
3343 } /* end GetCurrentThreadCpuTimerInfo */
3344
3345
3346 // nanos_ptr - pre-checked for NULL
3347 jvmtiError
3348 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3349 *nanos_ptr = os::current_thread_cpu_time();
3350 return JVMTI_ERROR_NONE;
3351 } /* end GetCurrentThreadCpuTime */
3352
3353
3354 // info_ptr - pre-checked for NULL
3355 jvmtiError
3356 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3357 os::thread_cpu_time_info(info_ptr);
3358 return JVMTI_ERROR_NONE;
3359 } /* end GetThreadCpuTimerInfo */
3360
3361
3362 // Threads_lock NOT held, java_thread not protected by lock
3363 // java_thread - pre-checked
3364 // nanos_ptr - pre-checked for NULL
3365 jvmtiError
3366 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3367 *nanos_ptr = os::thread_cpu_time(java_thread);
3368 return JVMTI_ERROR_NONE;
3369 } /* end GetThreadCpuTime */
3370
3371
3372 // info_ptr - pre-checked for NULL
3373 jvmtiError
3374 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3375 os::javaTimeNanos_info(info_ptr);
3376 return JVMTI_ERROR_NONE;
3377 } /* end GetTimerInfo */
3378
3379
3380 // nanos_ptr - pre-checked for NULL
3381 jvmtiError
3382 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3383 *nanos_ptr = os::javaTimeNanos();
3384 return JVMTI_ERROR_NONE;
3385 } /* end GetTime */
3386
3387
3388 // processor_count_ptr - pre-checked for NULL
3389 jvmtiError
3390 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3391 *processor_count_ptr = os::active_processor_count();
3392 return JVMTI_ERROR_NONE;
3393 } /* end GetAvailableProcessors */
3394
3395 //
3396 // System Properties functions
3397 //
3398
3399 // count_ptr - pre-checked for NULL
3400 // property_ptr - pre-checked for NULL
3401 jvmtiError
3402 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3403 jvmtiError err = JVMTI_ERROR_NONE;
3404
3405 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3406
3407 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3408 if (err != JVMTI_ERROR_NONE) {
3409 return err;
3410 }
3411 int i = 0 ;
3412 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3413 const char *key = p->key();
3414 char **tmp_value = *property_ptr+i;
3415 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3416 if (err == JVMTI_ERROR_NONE) {
3417 strcpy(*tmp_value, key);
3418 } else {
3419 // clean up previously allocated memory.
3420 for (int j=0; j<i; j++) {
3421 Deallocate((unsigned char*)*property_ptr+j);
3422 }
3423 Deallocate((unsigned char*)property_ptr);
3424 break;
3425 }
3426 }
3427 return err;
3428 } /* end GetSystemProperties */
3429
3430
3431 // property - pre-checked for NULL
3432 // value_ptr - pre-checked for NULL
3433 jvmtiError
3434 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3435 jvmtiError err = JVMTI_ERROR_NONE;
3436 const char *value;
3437
3438 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3439 if (value == NULL) {
3440 err = JVMTI_ERROR_NOT_AVAILABLE;
3441 } else {
3442 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3443 if (err == JVMTI_ERROR_NONE) {
3444 strcpy(*value_ptr, value);
3445 }
3446 }
3447 return err;
3448 } /* end GetSystemProperty */
3449
3450
3451 // property - pre-checked for NULL
3452 // value - NULL is a valid value, must be checked
3453 jvmtiError
3454 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3455 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3456
3457 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3458 if (strcmp(property, p->key()) == 0) {
3459 if (p->set_value((char *)value_ptr)) {
3460 err = JVMTI_ERROR_NONE;
3461 }
3462 }
3463 }
3464 return err;
3465 } /* end SetSystemProperty */