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 JvmtiClassFileReconstituter reconstituter(ikh);
262 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
263 return reconstituter.get_error();
264 }
265
266 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
267 class_definitions[index].class_bytes = (unsigned char*)
268 reconstituter.class_file_bytes();
269 } else {
270 // it is cached, get it from the cache
271 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
272 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
273 }
274 class_definitions[index].klass = jcls;
275 }
276 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
277 VMThread::execute(&op);
278 return (op.check_error());
279 } /* end RetransformClasses */
280
281
282 // class_count - pre-checked to be greater than or equal to 0
283 // class_definitions - pre-checked for NULL
284 jvmtiError
285 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
286 //TODO: add locking
287 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
288 VMThread::execute(&op);
289 return (op.check_error());
290 } /* end RedefineClasses */
291
292
293 //
294 // Object functions
295 //
296
297 // size_ptr - pre-checked for NULL
298 jvmtiError
299 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
300 oop mirror = JNIHandles::resolve_external_guard(object);
301 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
302
303 if (mirror->klass() == SystemDictionary::Class_klass() &&
304 !java_lang_Class::is_primitive(mirror)) {
305 Klass* k = java_lang_Class::as_Klass(mirror);
306 assert(k != NULL, "class for non-primitive mirror must exist");
307 *size_ptr = (jlong)k->size() * wordSize;
308 } else {
309 *size_ptr = (jlong)mirror->size() * wordSize;
310 }
311 return JVMTI_ERROR_NONE;
312 } /* end GetObjectSize */
313
314 //
315 // Method functions
316 //
317
318 // prefix - NULL is a valid value, must be checked
319 jvmtiError
320 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
321 return prefix == NULL?
322 SetNativeMethodPrefixes(0, NULL) :
323 SetNativeMethodPrefixes(1, (char**)&prefix);
324 } /* end SetNativeMethodPrefix */
325
326
327 // prefix_count - pre-checked to be greater than or equal to 0
328 // prefixes - pre-checked for NULL
329 jvmtiError
330 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
331 // Have to grab JVMTI thread state lock to be sure that some thread
332 // isn't accessing the prefixes at the same time we are setting them.
333 // No locks during VM bring-up.
334 if (Threads::number_of_threads() == 0) {
335 return set_native_method_prefixes(prefix_count, prefixes);
336 } else {
337 MutexLocker mu(JvmtiThreadState_lock);
338 return set_native_method_prefixes(prefix_count, prefixes);
339 }
340 } /* end SetNativeMethodPrefixes */
341
342 //
343 // Event Management functions
344 //
345
346 // callbacks - NULL is a valid value, must be checked
347 // size_of_callbacks - pre-checked to be greater than or equal to 0
348 jvmtiError
349 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
350 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
351 return JVMTI_ERROR_NONE;
352 } /* end SetEventCallbacks */
353
354
355 // event_thread - NULL is a valid value, must be checked
356 jvmtiError
357 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
358 JavaThread* java_thread = NULL;
359 if (event_thread != NULL) {
360 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
361 if (thread_oop == NULL) {
362 return JVMTI_ERROR_INVALID_THREAD;
363 }
364 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
365 return JVMTI_ERROR_INVALID_THREAD;
366 }
367 java_thread = java_lang_Thread::thread(thread_oop);
368 if (java_thread == NULL) {
369 return JVMTI_ERROR_THREAD_NOT_ALIVE;
370 }
371 }
372
373 // event_type must be valid
374 if (!JvmtiEventController::is_valid_event_type(event_type)) {
375 return JVMTI_ERROR_INVALID_EVENT_TYPE;
376 }
377
378 // global events cannot be controlled at thread level.
379 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
380 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
381 }
382
383 bool enabled = (mode == JVMTI_ENABLE);
384
385 // assure that needed capabilities are present
386 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
387 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
388 }
389
390 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
391 record_class_file_load_hook_enabled();
392 }
393 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
394
395 return JVMTI_ERROR_NONE;
396 } /* end SetEventNotificationMode */
397
398 //
399 // Capability functions
400 //
401
402 // capabilities_ptr - pre-checked for NULL
403 jvmtiError
404 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
405 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
406 get_prohibited_capabilities(),
407 capabilities_ptr);
408 return JVMTI_ERROR_NONE;
409 } /* end GetPotentialCapabilities */
410
411
412 // capabilities_ptr - pre-checked for NULL
413 jvmtiError
414 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
415 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
416 get_prohibited_capabilities(),
417 capabilities_ptr,
418 get_capabilities());
419 } /* end AddCapabilities */
420
421
422 // capabilities_ptr - pre-checked for NULL
423 jvmtiError
424 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
425 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
426 return JVMTI_ERROR_NONE;
427 } /* end RelinquishCapabilities */
428
429
430 // capabilities_ptr - pre-checked for NULL
431 jvmtiError
432 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
433 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
434 return JVMTI_ERROR_NONE;
435 } /* end GetCapabilities */
436
437 //
438 // Class Loader Search functions
439 //
440
441 // segment - pre-checked for NULL
442 jvmtiError
443 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
444 jvmtiPhase phase = get_phase();
445 if (phase == JVMTI_PHASE_ONLOAD) {
446 Arguments::append_sysclasspath(segment);
447 return JVMTI_ERROR_NONE;
448 } else if (use_version_1_0_semantics()) {
449 // This JvmtiEnv requested version 1.0 semantics and this function
450 // is only allowed in the ONLOAD phase in version 1.0 so we need to
451 // return an error here.
452 return JVMTI_ERROR_WRONG_PHASE;
453 } else if (phase == JVMTI_PHASE_LIVE) {
454 // The phase is checked by the wrapper that called this function,
455 // but this thread could be racing with the thread that is
456 // terminating the VM so we check one more time.
457
458 // create the zip entry
459 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
460 if (zip_entry == NULL) {
461 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
462 }
463
464 // lock the loader
465 Thread* thread = Thread::current();
466 HandleMark hm;
467 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
468
469 ObjectLocker ol(loader_lock, thread);
470
471 // add the jar file to the bootclasspath
472 if (TraceClassLoading) {
473 tty->print_cr("[Opened %s]", zip_entry->name());
474 }
475 ClassLoader::add_to_list(zip_entry);
476 return JVMTI_ERROR_NONE;
477 } else {
478 return JVMTI_ERROR_WRONG_PHASE;
479 }
480
481 } /* end AddToBootstrapClassLoaderSearch */
482
483
484 // segment - pre-checked for NULL
485 jvmtiError
486 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
487 jvmtiPhase phase = get_phase();
488
489 if (phase == JVMTI_PHASE_ONLOAD) {
490 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
491 if (strcmp("java.class.path", p->key()) == 0) {
492 p->append_value(segment);
493 break;
494 }
495 }
496 return JVMTI_ERROR_NONE;
497 } else if (phase == JVMTI_PHASE_LIVE) {
498 // The phase is checked by the wrapper that called this function,
499 // but this thread could be racing with the thread that is
500 // terminating the VM so we check one more time.
501 HandleMark hm;
502
503 // create the zip entry (which will open the zip file and hence
504 // check that the segment is indeed a zip file).
505 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
506 if (zip_entry == NULL) {
507 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
508 }
509 delete zip_entry; // no longer needed
510
511 // lock the loader
512 Thread* THREAD = Thread::current();
513 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
514
515 ObjectLocker ol(loader, THREAD);
516
517 // need the path as java.lang.String
518 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
519 if (HAS_PENDING_EXCEPTION) {
520 CLEAR_PENDING_EXCEPTION;
521 return JVMTI_ERROR_INTERNAL;
522 }
523
524 instanceKlassHandle loader_ik(THREAD, loader->klass());
525
526 // Invoke the appendToClassPathForInstrumentation method - if the method
527 // is not found it means the loader doesn't support adding to the class path
528 // in the live phase.
529 {
530 JavaValue res(T_VOID);
531 JavaCalls::call_special(&res,
532 loader,
533 loader_ik,
534 vmSymbols::appendToClassPathForInstrumentation_name(),
535 vmSymbols::appendToClassPathForInstrumentation_signature(),
536 path,
537 THREAD);
538 if (HAS_PENDING_EXCEPTION) {
539 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
540 CLEAR_PENDING_EXCEPTION;
541
542 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
543 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
544 } else {
545 return JVMTI_ERROR_INTERNAL;
546 }
547 }
548 }
549
550 return JVMTI_ERROR_NONE;
551 } else {
552 return JVMTI_ERROR_WRONG_PHASE;
553 }
554 } /* end AddToSystemClassLoaderSearch */
555
556 //
557 // General functions
558 //
559
560 // phase_ptr - pre-checked for NULL
561 jvmtiError
562 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
563 *phase_ptr = get_phase();
564 return JVMTI_ERROR_NONE;
565 } /* end GetPhase */
566
567
568 jvmtiError
569 JvmtiEnv::DisposeEnvironment() {
570 dispose();
571 return JVMTI_ERROR_NONE;
572 } /* end DisposeEnvironment */
573
574
575 // data - NULL is a valid value, must be checked
576 jvmtiError
577 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
578 set_env_local_storage(data);
579 return JVMTI_ERROR_NONE;
580 } /* end SetEnvironmentLocalStorage */
581
582
583 // data_ptr - pre-checked for NULL
584 jvmtiError
585 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
586 *data_ptr = (void*)get_env_local_storage();
587 return JVMTI_ERROR_NONE;
588 } /* end GetEnvironmentLocalStorage */
589
590 // version_ptr - pre-checked for NULL
591 jvmtiError
592 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
593 *version_ptr = JVMTI_VERSION;
594 return JVMTI_ERROR_NONE;
595 } /* end GetVersionNumber */
596
597
598 // name_ptr - pre-checked for NULL
599 jvmtiError
600 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
601 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
602 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
603 }
604 const char *name = JvmtiUtil::error_name(error);
605 if (name == NULL) {
606 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
607 }
608 size_t len = strlen(name) + 1;
609 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
610 if (err == JVMTI_ERROR_NONE) {
611 memcpy(*name_ptr, name, len);
612 }
613 return err;
614 } /* end GetErrorName */
615
616
617 jvmtiError
618 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
619 switch (flag) {
620 case JVMTI_VERBOSE_OTHER:
621 // ignore
622 break;
623 case JVMTI_VERBOSE_CLASS:
624 TraceClassLoading = value != 0;
625 TraceClassUnloading = value != 0;
626 break;
627 case JVMTI_VERBOSE_GC:
628 PrintGC = value != 0;
629 break;
630 case JVMTI_VERBOSE_JNI:
631 PrintJNIResolving = value != 0;
632 break;
633 default:
634 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
635 };
636 return JVMTI_ERROR_NONE;
637 } /* end SetVerboseFlag */
638
639
640 // format_ptr - pre-checked for NULL
641 jvmtiError
642 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
643 *format_ptr = JVMTI_JLOCATION_JVMBCI;
644 return JVMTI_ERROR_NONE;
645 } /* end GetJLocationFormat */
646
647 //
648 // Thread functions
649 //
650
651 // Threads_lock NOT held
652 // thread - NOT pre-checked
653 // thread_state_ptr - pre-checked for NULL
654 jvmtiError
655 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
656 jint state;
657 oop thread_oop;
658 JavaThread* thr;
659
660 if (thread == NULL) {
661 thread_oop = JavaThread::current()->threadObj();
662 } else {
663 thread_oop = JNIHandles::resolve_external_guard(thread);
664 }
665
666 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
667 return JVMTI_ERROR_INVALID_THREAD;
668 }
669
670 // get most state bits
671 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
672
673 // add more state bits
674 thr = java_lang_Thread::thread(thread_oop);
675 if (thr != NULL) {
676 JavaThreadState jts = thr->thread_state();
677
678 if (thr->is_being_ext_suspended()) {
679 state |= JVMTI_THREAD_STATE_SUSPENDED;
680 }
681 if (jts == _thread_in_native) {
682 state |= JVMTI_THREAD_STATE_IN_NATIVE;
683 }
684 OSThread* osThread = thr->osthread();
685 if (osThread != NULL && osThread->interrupted()) {
686 state |= JVMTI_THREAD_STATE_INTERRUPTED;
687 }
688 }
689
690 *thread_state_ptr = state;
691 return JVMTI_ERROR_NONE;
692 } /* end GetThreadState */
693
694
695 // thread_ptr - pre-checked for NULL
696 jvmtiError
697 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
698 JavaThread* current_thread = JavaThread::current();
699 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
700 return JVMTI_ERROR_NONE;
701 } /* end GetCurrentThread */
702
703
704 // threads_count_ptr - pre-checked for NULL
705 // threads_ptr - pre-checked for NULL
706 jvmtiError
707 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
708 int nthreads = 0;
709 Handle *thread_objs = NULL;
710 ResourceMark rm;
711 HandleMark hm;
712
713 // enumerate threads (including agent threads)
714 ThreadsListEnumerator tle(Thread::current(), true);
715 nthreads = tle.num_threads();
716 *threads_count_ptr = nthreads;
717
718 if (nthreads == 0) {
719 *threads_ptr = NULL;
720 return JVMTI_ERROR_NONE;
721 }
722
723 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
724 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
725
726 for (int i=0; i < nthreads; i++) {
727 thread_objs[i] = Handle(tle.get_threadObj(i));
728 }
729
730 // have to make global handles outside of Threads_lock
731 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
732 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
733
734 *threads_ptr = jthreads;
735 return JVMTI_ERROR_NONE;
736 } /* end GetAllThreads */
737
738
739 // Threads_lock NOT held, java_thread not protected by lock
740 // java_thread - pre-checked
741 jvmtiError
742 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
743 // don't allow hidden thread suspend request.
744 if (java_thread->is_hidden_from_external_view()) {
745 return (JVMTI_ERROR_NONE);
746 }
747
748 {
749 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
750 if (java_thread->is_external_suspend()) {
751 // don't allow nested external suspend requests.
752 return (JVMTI_ERROR_THREAD_SUSPENDED);
753 }
754 if (java_thread->is_exiting()) { // thread is in the process of exiting
755 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
756 }
757 java_thread->set_external_suspend();
758 }
759
760 if (!JvmtiSuspendControl::suspend(java_thread)) {
761 // the thread was in the process of exiting
762 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
763 }
764 return JVMTI_ERROR_NONE;
765 } /* end SuspendThread */
766
767
768 // request_count - pre-checked to be greater than or equal to 0
769 // request_list - pre-checked for NULL
770 // results - pre-checked for NULL
771 jvmtiError
772 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
773 int needSafepoint = 0; // > 0 if we need a safepoint
774 for (int i = 0; i < request_count; i++) {
775 JavaThread *java_thread = get_JavaThread(request_list[i]);
776 if (java_thread == NULL) {
777 results[i] = JVMTI_ERROR_INVALID_THREAD;
778 continue;
779 }
780 // the thread has not yet run or has exited (not on threads list)
781 if (java_thread->threadObj() == NULL) {
782 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
783 continue;
784 }
785 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
786 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
787 continue;
788 }
789 // don't allow hidden thread suspend request.
790 if (java_thread->is_hidden_from_external_view()) {
791 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
792 continue;
793 }
794
795 {
796 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
797 if (java_thread->is_external_suspend()) {
798 // don't allow nested external suspend requests.
799 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
800 continue;
801 }
802 if (java_thread->is_exiting()) { // thread is in the process of exiting
803 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
804 continue;
805 }
806 java_thread->set_external_suspend();
807 }
808 if (java_thread->thread_state() == _thread_in_native) {
809 // We need to try and suspend native threads here. Threads in
810 // other states will self-suspend on their next transition.
811 if (!JvmtiSuspendControl::suspend(java_thread)) {
812 // The thread was in the process of exiting. Force another
813 // safepoint to make sure that this thread transitions.
814 needSafepoint++;
815 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
816 continue;
817 }
818 } else {
819 needSafepoint++;
820 }
821 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
822 }
823 if (needSafepoint > 0) {
824 VM_ForceSafepoint vfs;
825 VMThread::execute(&vfs);
826 }
827 // per-thread suspend results returned via results parameter
828 return JVMTI_ERROR_NONE;
829 } /* end SuspendThreadList */
830
831
832 // Threads_lock NOT held, java_thread not protected by lock
833 // java_thread - pre-checked
834 jvmtiError
835 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
836 // don't allow hidden thread resume request.
837 if (java_thread->is_hidden_from_external_view()) {
838 return JVMTI_ERROR_NONE;
839 }
840
841 if (!java_thread->is_being_ext_suspended()) {
842 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
843 }
844
845 if (!JvmtiSuspendControl::resume(java_thread)) {
846 return JVMTI_ERROR_INTERNAL;
847 }
848 return JVMTI_ERROR_NONE;
849 } /* end ResumeThread */
850
851
852 // request_count - pre-checked to be greater than or equal to 0
853 // request_list - pre-checked for NULL
854 // results - pre-checked for NULL
855 jvmtiError
856 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
857 for (int i = 0; i < request_count; i++) {
858 JavaThread *java_thread = get_JavaThread(request_list[i]);
859 if (java_thread == NULL) {
860 results[i] = JVMTI_ERROR_INVALID_THREAD;
861 continue;
862 }
863 // don't allow hidden thread resume request.
864 if (java_thread->is_hidden_from_external_view()) {
865 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
866 continue;
867 }
868 if (!java_thread->is_being_ext_suspended()) {
869 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
870 continue;
871 }
872
873 if (!JvmtiSuspendControl::resume(java_thread)) {
874 results[i] = JVMTI_ERROR_INTERNAL;
875 continue;
876 }
877
878 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
879 }
880 // per-thread resume results returned via results parameter
881 return JVMTI_ERROR_NONE;
882 } /* end ResumeThreadList */
883
884
885 // Threads_lock NOT held, java_thread not protected by lock
886 // java_thread - pre-checked
887 jvmtiError
888 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
889 oop e = JNIHandles::resolve_external_guard(exception);
890 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
891
892 JavaThread::send_async_exception(java_thread->threadObj(), e);
893
894 return JVMTI_ERROR_NONE;
895
896 } /* end StopThread */
897
898
899 // Threads_lock NOT held
900 // thread - NOT pre-checked
901 jvmtiError
902 JvmtiEnv::InterruptThread(jthread thread) {
903 oop thread_oop = JNIHandles::resolve_external_guard(thread);
904 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
905 return JVMTI_ERROR_INVALID_THREAD;
906
907 JavaThread* current_thread = JavaThread::current();
908
909 // Todo: this is a duplicate of JVM_Interrupt; share code in future
910 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
911 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
912 // We need to re-resolve the java_thread, since a GC might have happened during the
913 // acquire of the lock
914
915 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
916 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
917
918 Thread::interrupt(java_thread);
919
920 return JVMTI_ERROR_NONE;
921 } /* end InterruptThread */
922
923
924 // Threads_lock NOT held
925 // thread - NOT pre-checked
926 // info_ptr - pre-checked for NULL
927 jvmtiError
928 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
929 ResourceMark rm;
930 HandleMark hm;
931
932 JavaThread* current_thread = JavaThread::current();
933
934 // if thread is NULL the current thread is used
935 oop thread_oop;
936 if (thread == NULL) {
937 thread_oop = current_thread->threadObj();
938 } else {
939 thread_oop = JNIHandles::resolve_external_guard(thread);
940 }
941 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
942 return JVMTI_ERROR_INVALID_THREAD;
943
944 Handle thread_obj(current_thread, thread_oop);
945 Handle name;
946 ThreadPriority priority;
947 Handle thread_group;
948 Handle context_class_loader;
949 bool is_daemon;
950
951 { MutexLocker mu(Threads_lock);
952
953 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
954 priority = java_lang_Thread::priority(thread_obj());
955 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
956 is_daemon = java_lang_Thread::is_daemon(thread_obj());
957
958 oop loader = java_lang_Thread::context_class_loader(thread_obj());
959 context_class_loader = Handle(current_thread, loader);
960 }
961 { const char *n;
962
963 if (name() != NULL) {
964 n = java_lang_String::as_utf8_string(name());
965 } else {
966 n = UNICODE::as_utf8(NULL, 0);
967 }
968
969 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
970 if (info_ptr->name == NULL)
971 return JVMTI_ERROR_OUT_OF_MEMORY;
972
973 strcpy(info_ptr->name, n);
974 }
975 info_ptr->is_daemon = is_daemon;
976 info_ptr->priority = priority;
977
978 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
979 jni_reference(context_class_loader);
980 info_ptr->thread_group = jni_reference(thread_group);
981
982 return JVMTI_ERROR_NONE;
983 } /* end GetThreadInfo */
984
985
986 // Threads_lock NOT held, java_thread not protected by lock
987 // java_thread - pre-checked
988 // owned_monitor_count_ptr - pre-checked for NULL
989 // owned_monitors_ptr - pre-checked for NULL
990 jvmtiError
991 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
992 jvmtiError err = JVMTI_ERROR_NONE;
993 JavaThread* calling_thread = JavaThread::current();
994
995 // growable array of jvmti monitors info on the C-heap
996 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
997 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
998
999 // It is only safe to perform the direct operation on the current
1000 // thread. All other usage needs to use a vm-safepoint-op for safety.
1001 if (java_thread == calling_thread) {
1002 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1003 } else {
1004 // JVMTI get monitors info at safepoint. Do not require target thread to
1005 // be suspended.
1006 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1007 VMThread::execute(&op);
1008 err = op.result();
1009 }
1010 jint owned_monitor_count = owned_monitors_list->length();
1011 if (err == JVMTI_ERROR_NONE) {
1012 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1013 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1014 // copy into the returned array
1015 for (int i = 0; i < owned_monitor_count; i++) {
1016 (*owned_monitors_ptr)[i] =
1017 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1018 }
1019 *owned_monitor_count_ptr = owned_monitor_count;
1020 }
1021 }
1022 // clean up.
1023 for (int i = 0; i < owned_monitor_count; i++) {
1024 deallocate((unsigned char*)owned_monitors_list->at(i));
1025 }
1026 delete owned_monitors_list;
1027
1028 return err;
1029 } /* end GetOwnedMonitorInfo */
1030
1031
1032 // Threads_lock NOT held, java_thread not protected by lock
1033 // java_thread - pre-checked
1034 // monitor_info_count_ptr - pre-checked for NULL
1035 // monitor_info_ptr - pre-checked for NULL
1036 jvmtiError
1037 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1038 jvmtiError err = JVMTI_ERROR_NONE;
1039 JavaThread* calling_thread = JavaThread::current();
1040
1041 // growable array of jvmti monitors info on the C-heap
1042 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1043 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1044
1045 // It is only safe to perform the direct operation on the current
1046 // thread. All other usage needs to use a vm-safepoint-op for safety.
1047 if (java_thread == calling_thread) {
1048 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1049 } else {
1050 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1051 // be suspended.
1052 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1053 VMThread::execute(&op);
1054 err = op.result();
1055 }
1056
1057 jint owned_monitor_count = owned_monitors_list->length();
1058 if (err == JVMTI_ERROR_NONE) {
1059 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1060 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1061 // copy to output array.
1062 for (int i = 0; i < owned_monitor_count; i++) {
1063 (*monitor_info_ptr)[i].monitor =
1064 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1065 (*monitor_info_ptr)[i].stack_depth =
1066 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1067 }
1068 }
1069 *monitor_info_count_ptr = owned_monitor_count;
1070 }
1071
1072 // clean up.
1073 for (int i = 0; i < owned_monitor_count; i++) {
1074 deallocate((unsigned char*)owned_monitors_list->at(i));
1075 }
1076 delete owned_monitors_list;
1077
1078 return err;
1079 } /* end GetOwnedMonitorStackDepthInfo */
1080
1081
1082 // Threads_lock NOT held, java_thread not protected by lock
1083 // java_thread - pre-checked
1084 // monitor_ptr - pre-checked for NULL
1085 jvmtiError
1086 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1087 jvmtiError err = JVMTI_ERROR_NONE;
1088 JavaThread* calling_thread = JavaThread::current();
1089
1090 // It is only safe to perform the direct operation on the current
1091 // thread. All other usage needs to use a vm-safepoint-op for safety.
1092 if (java_thread == calling_thread) {
1093 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1094 } else {
1095 // get contended monitor information at safepoint.
1096 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1097 VMThread::execute(&op);
1098 err = op.result();
1099 }
1100 return err;
1101 } /* end GetCurrentContendedMonitor */
1102
1103
1104 // Threads_lock NOT held
1105 // thread - NOT pre-checked
1106 // proc - pre-checked for NULL
1107 // arg - NULL is a valid value, must be checked
1108 jvmtiError
1109 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1110 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1111 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1112 return JVMTI_ERROR_INVALID_THREAD;
1113 }
1114 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1115 return JVMTI_ERROR_INVALID_PRIORITY;
1116 }
1117
1118 //Thread-self
1119 JavaThread* current_thread = JavaThread::current();
1120
1121 Handle thread_hndl(current_thread, thread_oop);
1122 {
1123 MutexLocker mu(Threads_lock); // grab Threads_lock
1124
1125 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1126
1127 // At this point it may be possible that no osthread was created for the
1128 // JavaThread due to lack of memory.
1129 if (new_thread == NULL || new_thread->osthread() == NULL) {
1130 if (new_thread) delete new_thread;
1131 return JVMTI_ERROR_OUT_OF_MEMORY;
1132 }
1133
1134 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1135 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1136 java_lang_Thread::set_daemon(thread_hndl());
1137
1138 new_thread->set_threadObj(thread_hndl());
1139 Threads::add(new_thread);
1140 Thread::start(new_thread);
1141 } // unlock Threads_lock
1142
1143 return JVMTI_ERROR_NONE;
1144 } /* end RunAgentThread */
1145
1146 //
1147 // Thread Group functions
1148 //
1149
1150 // group_count_ptr - pre-checked for NULL
1151 // groups_ptr - pre-checked for NULL
1152 jvmtiError
1153 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1154 JavaThread* current_thread = JavaThread::current();
1155
1156 // Only one top level thread group now.
1157 *group_count_ptr = 1;
1158
1159 // Allocate memory to store global-refs to the thread groups.
1160 // Assume this area is freed by caller.
1161 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1162
1163 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1164
1165 // Convert oop to Handle, then convert Handle to global-ref.
1166 {
1167 HandleMark hm(current_thread);
1168 Handle system_thread_group(current_thread, Universe::system_thread_group());
1169 *groups_ptr[0] = jni_reference(system_thread_group);
1170 }
1171
1172 return JVMTI_ERROR_NONE;
1173 } /* end GetTopThreadGroups */
1174
1175
1176 // info_ptr - pre-checked for NULL
1177 jvmtiError
1178 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1179 ResourceMark rm;
1180 HandleMark hm;
1181
1182 JavaThread* current_thread = JavaThread::current();
1183
1184 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1185 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1186
1187 typeArrayHandle name;
1188 Handle parent_group;
1189 bool is_daemon;
1190 ThreadPriority max_priority;
1191
1192 { MutexLocker mu(Threads_lock);
1193
1194 name = typeArrayHandle(current_thread,
1195 java_lang_ThreadGroup::name(group_obj()));
1196 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1197 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1198 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1199 }
1200
1201 info_ptr->is_daemon = is_daemon;
1202 info_ptr->max_priority = max_priority;
1203 info_ptr->parent = jni_reference(parent_group);
1204
1205 if (name() != NULL) {
1206 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
1207 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
1208 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1209 strcpy(info_ptr->name, n);
1210 } else {
1211 info_ptr->name = NULL;
1212 }
1213
1214 return JVMTI_ERROR_NONE;
1215 } /* end GetThreadGroupInfo */
1216
1217
1218 // thread_count_ptr - pre-checked for NULL
1219 // threads_ptr - pre-checked for NULL
1220 // group_count_ptr - pre-checked for NULL
1221 // groups_ptr - pre-checked for NULL
1222 jvmtiError
1223 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1224 JavaThread* current_thread = JavaThread::current();
1225 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1226 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1227
1228 Handle *thread_objs = NULL;
1229 Handle *group_objs = NULL;
1230 int nthreads = 0;
1231 int ngroups = 0;
1232 int hidden_threads = 0;
1233
1234 ResourceMark rm;
1235 HandleMark hm;
1236
1237 Handle group_hdl(current_thread, group_obj);
1238
1239 { MutexLocker mu(Threads_lock);
1240
1241 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1242 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1243
1244 if (nthreads > 0) {
1245 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1246 assert(nthreads <= threads->length(), "too many threads");
1247 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1248 for (int i=0, j=0; i<nthreads; i++) {
1249 oop thread_obj = threads->obj_at(i);
1250 assert(thread_obj != NULL, "thread_obj is NULL");
1251 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1252 // Filter out hidden java threads.
1253 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1254 hidden_threads++;
1255 continue;
1256 }
1257 thread_objs[j++] = Handle(current_thread, thread_obj);
1258 }
1259 nthreads -= hidden_threads;
1260 }
1261 if (ngroups > 0) {
1262 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1263 assert(ngroups <= groups->length(), "too many threads");
1264 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1265 for (int i=0; i<ngroups; i++) {
1266 oop group_obj = groups->obj_at(i);
1267 assert(group_obj != NULL, "group_obj != NULL");
1268 group_objs[i] = Handle(current_thread, group_obj);
1269 }
1270 }
1271 }
1272
1273 // have to make global handles outside of Threads_lock
1274 *group_count_ptr = ngroups;
1275 *thread_count_ptr = nthreads;
1276 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1277 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1278 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1279 return JVMTI_ERROR_OUT_OF_MEMORY;
1280 }
1281 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1282 return JVMTI_ERROR_OUT_OF_MEMORY;
1283 }
1284
1285 return JVMTI_ERROR_NONE;
1286 } /* end GetThreadGroupChildren */
1287
1288
1289 //
1290 // Stack Frame functions
1291 //
1292
1293 // Threads_lock NOT held, java_thread not protected by lock
1294 // java_thread - pre-checked
1295 // max_frame_count - pre-checked to be greater than or equal to 0
1296 // frame_buffer - pre-checked for NULL
1297 // count_ptr - pre-checked for NULL
1298 jvmtiError
1299 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1300 jvmtiError err = JVMTI_ERROR_NONE;
1301
1302 // It is only safe to perform the direct operation on the current
1303 // thread. All other usage needs to use a vm-safepoint-op for safety.
1304 if (java_thread == JavaThread::current()) {
1305 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1306 } else {
1307 // JVMTI get stack trace at safepoint. Do not require target thread to
1308 // be suspended.
1309 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1310 VMThread::execute(&op);
1311 err = op.result();
1312 }
1313
1314 return err;
1315 } /* end GetStackTrace */
1316
1317
1318 // max_frame_count - pre-checked to be greater than or equal to 0
1319 // stack_info_ptr - pre-checked for NULL
1320 // thread_count_ptr - pre-checked for NULL
1321 jvmtiError
1322 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1323 jvmtiError err = JVMTI_ERROR_NONE;
1324 JavaThread* calling_thread = JavaThread::current();
1325
1326 // JVMTI get stack traces at safepoint.
1327 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1328 VMThread::execute(&op);
1329 *thread_count_ptr = op.final_thread_count();
1330 *stack_info_ptr = op.stack_info();
1331 err = op.result();
1332 return err;
1333 } /* end GetAllStackTraces */
1334
1335
1336 // thread_count - pre-checked to be greater than or equal to 0
1337 // thread_list - pre-checked for NULL
1338 // max_frame_count - pre-checked to be greater than or equal to 0
1339 // stack_info_ptr - pre-checked for NULL
1340 jvmtiError
1341 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1342 jvmtiError err = JVMTI_ERROR_NONE;
1343 // JVMTI get stack traces at safepoint.
1344 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1345 VMThread::execute(&op);
1346 err = op.result();
1347 if (err == JVMTI_ERROR_NONE) {
1348 *stack_info_ptr = op.stack_info();
1349 }
1350 return err;
1351 } /* end GetThreadListStackTraces */
1352
1353
1354 // Threads_lock NOT held, java_thread not protected by lock
1355 // java_thread - pre-checked
1356 // count_ptr - pre-checked for NULL
1357 jvmtiError
1358 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1359 jvmtiError err = JVMTI_ERROR_NONE;
1360
1361 // retrieve or create JvmtiThreadState.
1362 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1363 if (state == NULL) {
1364 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1365 }
1366
1367 // It is only safe to perform the direct operation on the current
1368 // thread. All other usage needs to use a vm-safepoint-op for safety.
1369 if (java_thread == JavaThread::current()) {
1370 err = get_frame_count(state, count_ptr);
1371 } else {
1372 // get java stack frame count at safepoint.
1373 VM_GetFrameCount op(this, state, count_ptr);
1374 VMThread::execute(&op);
1375 err = op.result();
1376 }
1377 return err;
1378 } /* end GetFrameCount */
1379
1380
1381 // Threads_lock NOT held, java_thread not protected by lock
1382 // java_thread - pre-checked
1383 jvmtiError
1384 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1385 JavaThread* current_thread = JavaThread::current();
1386 HandleMark hm(current_thread);
1387 uint32_t debug_bits = 0;
1388
1389 // retrieve or create the state
1390 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1391 if (state == NULL) {
1392 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1393 }
1394
1395 // Check if java_thread is fully suspended
1396 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1397 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1398 }
1399 // Check to see if a PopFrame was already in progress
1400 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1401 // Probably possible for JVMTI clients to trigger this, but the
1402 // JPDA backend shouldn't allow this to happen
1403 return JVMTI_ERROR_INTERNAL;
1404 }
1405
1406 {
1407 // Was workaround bug
1408 // 4812902: popFrame hangs if the method is waiting at a synchronize
1409 // Catch this condition and return an error to avoid hanging.
1410 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1411 OSThread* osThread = java_thread->osthread();
1412 if (osThread->get_state() == MONITOR_WAIT) {
1413 return JVMTI_ERROR_OPAQUE_FRAME;
1414 }
1415 }
1416
1417 {
1418 ResourceMark rm(current_thread);
1419 // Check if there are more than one Java frame in this thread, that the top two frames
1420 // are Java (not native) frames, and that there is no intervening VM frame
1421 int frame_count = 0;
1422 bool is_interpreted[2];
1423 intptr_t *frame_sp[2];
1424 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1425 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1426 methodHandle mh(current_thread, vfs.method());
1427 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1428 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1429 frame_sp[frame_count] = vfs.frame_id();
1430 if (++frame_count > 1) break;
1431 }
1432 if (frame_count < 2) {
1433 // We haven't found two adjacent non-native Java frames on the top.
1434 // There can be two situations here:
1435 // 1. There are no more java frames
1436 // 2. Two top java frames are separated by non-java native frames
1437 if(vframeFor(java_thread, 1) == NULL) {
1438 return JVMTI_ERROR_NO_MORE_FRAMES;
1439 } else {
1440 // Intervening non-java native or VM frames separate java frames.
1441 // Current implementation does not support this. See bug #5031735.
1442 // In theory it is possible to pop frames in such cases.
1443 return JVMTI_ERROR_OPAQUE_FRAME;
1444 }
1445 }
1446
1447 // If any of the top 2 frames is a compiled one, need to deoptimize it
1448 for (int i = 0; i < 2; i++) {
1449 if (!is_interpreted[i]) {
1450 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1451 }
1452 }
1453
1454 // Update the thread state to reflect that the top frame is popped
1455 // so that cur_stack_depth is maintained properly and all frameIDs
1456 // are invalidated.
1457 // The current frame will be popped later when the suspended thread
1458 // is resumed and right before returning from VM to Java.
1459 // (see call_VM_base() in assembler_<cpu>.cpp).
1460
1461 // It's fine to update the thread state here because no JVMTI events
1462 // shall be posted for this PopFrame.
1463
1464 // It is only safe to perform the direct operation on the current
1465 // thread. All other usage needs to use a vm-safepoint-op for safety.
1466 if (java_thread == JavaThread::current()) {
1467 state->update_for_pop_top_frame();
1468 } else {
1469 VM_UpdateForPopTopFrame op(state);
1470 VMThread::execute(&op);
1471 jvmtiError err = op.result();
1472 if (err != JVMTI_ERROR_NONE) {
1473 return err;
1474 }
1475 }
1476
1477 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1478 // Set pending step flag for this popframe and it is cleared when next
1479 // step event is posted.
1480 state->set_pending_step_for_popframe();
1481 }
1482
1483 return JVMTI_ERROR_NONE;
1484 } /* end PopFrame */
1485
1486
1487 // Threads_lock NOT held, java_thread not protected by lock
1488 // java_thread - pre-checked
1489 // java_thread - unchecked
1490 // depth - pre-checked as non-negative
1491 // method_ptr - pre-checked for NULL
1492 // location_ptr - pre-checked for NULL
1493 jvmtiError
1494 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1495 jvmtiError err = JVMTI_ERROR_NONE;
1496
1497 // It is only safe to perform the direct operation on the current
1498 // thread. All other usage needs to use a vm-safepoint-op for safety.
1499 if (java_thread == JavaThread::current()) {
1500 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1501 } else {
1502 // JVMTI get java stack frame location at safepoint.
1503 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1504 VMThread::execute(&op);
1505 err = op.result();
1506 }
1507 return err;
1508 } /* end GetFrameLocation */
1509
1510
1511 // Threads_lock NOT held, java_thread not protected by lock
1512 // java_thread - pre-checked
1513 // java_thread - unchecked
1514 // depth - pre-checked as non-negative
1515 jvmtiError
1516 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1517 jvmtiError err = JVMTI_ERROR_NONE;
1518 ResourceMark rm;
1519 uint32_t debug_bits = 0;
1520
1521 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1522 if (state == NULL) {
1523 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1524 }
1525
1526 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1527 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1528 }
1529
1530 if (TraceJVMTICalls) {
1531 JvmtiSuspendControl::print();
1532 }
1533
1534 vframe *vf = vframeFor(java_thread, depth);
1535 if (vf == NULL) {
1536 return JVMTI_ERROR_NO_MORE_FRAMES;
1537 }
1538
1539 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1540 return JVMTI_ERROR_OPAQUE_FRAME;
1541 }
1542
1543 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1544
1545 // It is only safe to perform the direct operation on the current
1546 // thread. All other usage needs to use a vm-safepoint-op for safety.
1547 if (java_thread == JavaThread::current()) {
1548 int frame_number = state->count_frames() - depth;
1549 state->env_thread_state(this)->set_frame_pop(frame_number);
1550 } else {
1551 VM_SetFramePop op(this, state, depth);
1552 VMThread::execute(&op);
1553 err = op.result();
1554 }
1555 return err;
1556 } /* end NotifyFramePop */
1557
1558
1559 //
1560 // Force Early Return functions
1561 //
1562
1563 // Threads_lock NOT held, java_thread not protected by lock
1564 // java_thread - pre-checked
1565 jvmtiError
1566 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1567 jvalue val;
1568 val.l = value;
1569 return force_early_return(java_thread, val, atos);
1570 } /* end ForceEarlyReturnObject */
1571
1572
1573 // Threads_lock NOT held, java_thread not protected by lock
1574 // java_thread - pre-checked
1575 jvmtiError
1576 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1577 jvalue val;
1578 val.i = value;
1579 return force_early_return(java_thread, val, itos);
1580 } /* end ForceEarlyReturnInt */
1581
1582
1583 // Threads_lock NOT held, java_thread not protected by lock
1584 // java_thread - pre-checked
1585 jvmtiError
1586 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1587 jvalue val;
1588 val.j = value;
1589 return force_early_return(java_thread, val, ltos);
1590 } /* end ForceEarlyReturnLong */
1591
1592
1593 // Threads_lock NOT held, java_thread not protected by lock
1594 // java_thread - pre-checked
1595 jvmtiError
1596 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1597 jvalue val;
1598 val.f = value;
1599 return force_early_return(java_thread, val, ftos);
1600 } /* end ForceEarlyReturnFloat */
1601
1602
1603 // Threads_lock NOT held, java_thread not protected by lock
1604 // java_thread - pre-checked
1605 jvmtiError
1606 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1607 jvalue val;
1608 val.d = value;
1609 return force_early_return(java_thread, val, dtos);
1610 } /* end ForceEarlyReturnDouble */
1611
1612
1613 // Threads_lock NOT held, java_thread not protected by lock
1614 // java_thread - pre-checked
1615 jvmtiError
1616 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1617 jvalue val;
1618 val.j = 0L;
1619 return force_early_return(java_thread, val, vtos);
1620 } /* end ForceEarlyReturnVoid */
1621
1622
1623 //
1624 // Heap functions
1625 //
1626
1627 // klass - NULL is a valid value, must be checked
1628 // initial_object - NULL is a valid value, must be checked
1629 // callbacks - pre-checked for NULL
1630 // user_data - NULL is a valid value, must be checked
1631 jvmtiError
1632 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1633 // check klass if provided
1634 Klass* k_oop = NULL;
1635 if (klass != NULL) {
1636 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1637 if (k_mirror == NULL) {
1638 return JVMTI_ERROR_INVALID_CLASS;
1639 }
1640 if (java_lang_Class::is_primitive(k_mirror)) {
1641 return JVMTI_ERROR_NONE;
1642 }
1643 k_oop = java_lang_Class::as_Klass(k_mirror);
1644 if (k_oop == NULL) {
1645 return JVMTI_ERROR_INVALID_CLASS;
1646 }
1647 }
1648
1649 Thread *thread = Thread::current();
1650 HandleMark hm(thread);
1651 KlassHandle kh (thread, k_oop);
1652
1653 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1654 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1655 return JVMTI_ERROR_NONE;
1656 } /* end FollowReferences */
1657
1658
1659 // klass - NULL is a valid value, must be checked
1660 // callbacks - pre-checked for NULL
1661 // user_data - NULL is a valid value, must be checked
1662 jvmtiError
1663 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1664 // check klass if provided
1665 Klass* k_oop = NULL;
1666 if (klass != NULL) {
1667 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1668 if (k_mirror == NULL) {
1669 return JVMTI_ERROR_INVALID_CLASS;
1670 }
1671 if (java_lang_Class::is_primitive(k_mirror)) {
1672 return JVMTI_ERROR_NONE;
1673 }
1674 k_oop = java_lang_Class::as_Klass(k_mirror);
1675 if (k_oop == NULL) {
1676 return JVMTI_ERROR_INVALID_CLASS;
1677 }
1678 }
1679
1680 Thread *thread = Thread::current();
1681 HandleMark hm(thread);
1682 KlassHandle kh (thread, k_oop);
1683
1684 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1685 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1686 return JVMTI_ERROR_NONE;
1687 } /* end IterateThroughHeap */
1688
1689
1690 // tag_ptr - pre-checked for NULL
1691 jvmtiError
1692 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1693 oop o = JNIHandles::resolve_external_guard(object);
1694 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1695 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1696 return JVMTI_ERROR_NONE;
1697 } /* end GetTag */
1698
1699
1700 jvmtiError
1701 JvmtiEnv::SetTag(jobject object, jlong tag) {
1702 oop o = JNIHandles::resolve_external_guard(object);
1703 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1704 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1705 return JVMTI_ERROR_NONE;
1706 } /* end SetTag */
1707
1708
1709 // tag_count - pre-checked to be greater than or equal to 0
1710 // tags - pre-checked for NULL
1711 // count_ptr - pre-checked for NULL
1712 // object_result_ptr - NULL is a valid value, must be checked
1713 // tag_result_ptr - NULL is a valid value, must be checked
1714 jvmtiError
1715 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1716 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1717 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1718 } /* end GetObjectsWithTags */
1719
1720
1721 jvmtiError
1722 JvmtiEnv::ForceGarbageCollection() {
1723 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1724 return JVMTI_ERROR_NONE;
1725 } /* end ForceGarbageCollection */
1726
1727
1728 //
1729 // Heap (1.0) functions
1730 //
1731
1732 // object_reference_callback - pre-checked for NULL
1733 // user_data - NULL is a valid value, must be checked
1734 jvmtiError
1735 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1736 oop o = JNIHandles::resolve_external_guard(object);
1737 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1738 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1739 return JVMTI_ERROR_NONE;
1740 } /* end IterateOverObjectsReachableFromObject */
1741
1742
1743 // heap_root_callback - NULL is a valid value, must be checked
1744 // stack_ref_callback - NULL is a valid value, must be checked
1745 // object_ref_callback - NULL is a valid value, must be checked
1746 // user_data - NULL is a valid value, must be checked
1747 jvmtiError
1748 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1749 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1750 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1751 return JVMTI_ERROR_NONE;
1752 } /* end IterateOverReachableObjects */
1753
1754
1755 // heap_object_callback - pre-checked for NULL
1756 // user_data - NULL is a valid value, must be checked
1757 jvmtiError
1758 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1759 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1760 Thread *thread = Thread::current();
1761 HandleMark hm(thread);
1762 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1763 return JVMTI_ERROR_NONE;
1764 } /* end IterateOverHeap */
1765
1766
1767 // k_mirror - may be primitive, this must be checked
1768 // heap_object_callback - pre-checked for NULL
1769 // user_data - NULL is a valid value, must be checked
1770 jvmtiError
1771 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1772 if (java_lang_Class::is_primitive(k_mirror)) {
1773 // DO PRIMITIVE CLASS PROCESSING
1774 return JVMTI_ERROR_NONE;
1775 }
1776 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1777 if (k_oop == NULL) {
1778 return JVMTI_ERROR_INVALID_CLASS;
1779 }
1780 Thread *thread = Thread::current();
1781 HandleMark hm(thread);
1782 KlassHandle klass (thread, k_oop);
1783 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1784 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1785 return JVMTI_ERROR_NONE;
1786 } /* end IterateOverInstancesOfClass */
1787
1788
1789 //
1790 // Local Variable functions
1791 //
1792
1793 // Threads_lock NOT held, java_thread not protected by lock
1794 // java_thread - pre-checked
1795 // java_thread - unchecked
1796 // depth - pre-checked as non-negative
1797 // value_ptr - pre-checked for NULL
1798 jvmtiError
1799 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1800 JavaThread* current_thread = JavaThread::current();
1801 // rm object is created to clean up the javaVFrame created in
1802 // doit_prologue(), but after doit() is finished with it.
1803 ResourceMark rm(current_thread);
1804
1805 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1806 VMThread::execute(&op);
1807 jvmtiError err = op.result();
1808 if (err != JVMTI_ERROR_NONE) {
1809 return err;
1810 } else {
1811 *value_ptr = op.value().l;
1812 return JVMTI_ERROR_NONE;
1813 }
1814 } /* end GetLocalObject */
1815
1816 // Threads_lock NOT held, java_thread not protected by lock
1817 // java_thread - pre-checked
1818 // java_thread - unchecked
1819 // depth - pre-checked as non-negative
1820 // value - pre-checked for NULL
1821 jvmtiError
1822 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1823 JavaThread* current_thread = JavaThread::current();
1824 // rm object is created to clean up the javaVFrame created in
1825 // doit_prologue(), but after doit() is finished with it.
1826 ResourceMark rm(current_thread);
1827
1828 VM_GetReceiver op(java_thread, current_thread, depth);
1829 VMThread::execute(&op);
1830 jvmtiError err = op.result();
1831 if (err != JVMTI_ERROR_NONE) {
1832 return err;
1833 } else {
1834 *value_ptr = op.value().l;
1835 return JVMTI_ERROR_NONE;
1836 }
1837 } /* end GetLocalInstance */
1838
1839
1840 // Threads_lock NOT held, java_thread not protected by lock
1841 // java_thread - pre-checked
1842 // java_thread - unchecked
1843 // depth - pre-checked as non-negative
1844 // value_ptr - pre-checked for NULL
1845 jvmtiError
1846 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1847 // rm object is created to clean up the javaVFrame created in
1848 // doit_prologue(), but after doit() is finished with it.
1849 ResourceMark rm;
1850
1851 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1852 VMThread::execute(&op);
1853 *value_ptr = op.value().i;
1854 return op.result();
1855 } /* end GetLocalInt */
1856
1857
1858 // Threads_lock NOT held, java_thread not protected by lock
1859 // java_thread - pre-checked
1860 // java_thread - unchecked
1861 // depth - pre-checked as non-negative
1862 // value_ptr - pre-checked for NULL
1863 jvmtiError
1864 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1865 // rm object is created to clean up the javaVFrame created in
1866 // doit_prologue(), but after doit() is finished with it.
1867 ResourceMark rm;
1868
1869 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1870 VMThread::execute(&op);
1871 *value_ptr = op.value().j;
1872 return op.result();
1873 } /* end GetLocalLong */
1874
1875
1876 // Threads_lock NOT held, java_thread not protected by lock
1877 // java_thread - pre-checked
1878 // java_thread - unchecked
1879 // depth - pre-checked as non-negative
1880 // value_ptr - pre-checked for NULL
1881 jvmtiError
1882 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1883 // rm object is created to clean up the javaVFrame created in
1884 // doit_prologue(), but after doit() is finished with it.
1885 ResourceMark rm;
1886
1887 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1888 VMThread::execute(&op);
1889 *value_ptr = op.value().f;
1890 return op.result();
1891 } /* end GetLocalFloat */
1892
1893
1894 // Threads_lock NOT held, java_thread not protected by lock
1895 // java_thread - pre-checked
1896 // java_thread - unchecked
1897 // depth - pre-checked as non-negative
1898 // value_ptr - pre-checked for NULL
1899 jvmtiError
1900 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1901 // rm object is created to clean up the javaVFrame created in
1902 // doit_prologue(), but after doit() is finished with it.
1903 ResourceMark rm;
1904
1905 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1906 VMThread::execute(&op);
1907 *value_ptr = op.value().d;
1908 return op.result();
1909 } /* end GetLocalDouble */
1910
1911
1912 // Threads_lock NOT held, java_thread not protected by lock
1913 // java_thread - pre-checked
1914 // java_thread - unchecked
1915 // depth - pre-checked as non-negative
1916 jvmtiError
1917 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1918 // rm object is created to clean up the javaVFrame created in
1919 // doit_prologue(), but after doit() is finished with it.
1920 ResourceMark rm;
1921 jvalue val;
1922 val.l = value;
1923 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1924 VMThread::execute(&op);
1925 return op.result();
1926 } /* end SetLocalObject */
1927
1928
1929 // Threads_lock NOT held, java_thread not protected by lock
1930 // java_thread - pre-checked
1931 // java_thread - unchecked
1932 // depth - pre-checked as non-negative
1933 jvmtiError
1934 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1935 // rm object is created to clean up the javaVFrame created in
1936 // doit_prologue(), but after doit() is finished with it.
1937 ResourceMark rm;
1938 jvalue val;
1939 val.i = value;
1940 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1941 VMThread::execute(&op);
1942 return op.result();
1943 } /* end SetLocalInt */
1944
1945
1946 // Threads_lock NOT held, java_thread not protected by lock
1947 // java_thread - pre-checked
1948 // java_thread - unchecked
1949 // depth - pre-checked as non-negative
1950 jvmtiError
1951 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1952 // rm object is created to clean up the javaVFrame created in
1953 // doit_prologue(), but after doit() is finished with it.
1954 ResourceMark rm;
1955 jvalue val;
1956 val.j = value;
1957 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1958 VMThread::execute(&op);
1959 return op.result();
1960 } /* end SetLocalLong */
1961
1962
1963 // Threads_lock NOT held, java_thread not protected by lock
1964 // java_thread - pre-checked
1965 // java_thread - unchecked
1966 // depth - pre-checked as non-negative
1967 jvmtiError
1968 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1969 // rm object is created to clean up the javaVFrame created in
1970 // doit_prologue(), but after doit() is finished with it.
1971 ResourceMark rm;
1972 jvalue val;
1973 val.f = value;
1974 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1975 VMThread::execute(&op);
1976 return op.result();
1977 } /* end SetLocalFloat */
1978
1979
1980 // Threads_lock NOT held, java_thread not protected by lock
1981 // java_thread - pre-checked
1982 // java_thread - unchecked
1983 // depth - pre-checked as non-negative
1984 jvmtiError
1985 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1986 // rm object is created to clean up the javaVFrame created in
1987 // doit_prologue(), but after doit() is finished with it.
1988 ResourceMark rm;
1989 jvalue val;
1990 val.d = value;
1991 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
1992 VMThread::execute(&op);
1993 return op.result();
1994 } /* end SetLocalDouble */
1995
1996
1997 //
1998 // Breakpoint functions
1999 //
2000
2001 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2002 jvmtiError
2003 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2004 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2005 if (location < 0) { // simple invalid location check first
2006 return JVMTI_ERROR_INVALID_LOCATION;
2007 }
2008 // verify that the breakpoint is not past the end of the method
2009 if (location >= (jlocation) method_oop->code_size()) {
2010 return JVMTI_ERROR_INVALID_LOCATION;
2011 }
2012
2013 ResourceMark rm;
2014 JvmtiBreakpoint bp(method_oop, location);
2015 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2016 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2017 return JVMTI_ERROR_DUPLICATE;
2018
2019 if (TraceJVMTICalls) {
2020 jvmti_breakpoints.print();
2021 }
2022
2023 return JVMTI_ERROR_NONE;
2024 } /* end SetBreakpoint */
2025
2026
2027 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2028 jvmtiError
2029 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2030 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2031
2032 if (location < 0) { // simple invalid location check first
2033 return JVMTI_ERROR_INVALID_LOCATION;
2034 }
2035
2036 // verify that the breakpoint is not past the end of the method
2037 if (location >= (jlocation) method_oop->code_size()) {
2038 return JVMTI_ERROR_INVALID_LOCATION;
2039 }
2040
2041 JvmtiBreakpoint bp(method_oop, location);
2042
2043 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2044 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2045 return JVMTI_ERROR_NOT_FOUND;
2046
2047 if (TraceJVMTICalls) {
2048 jvmti_breakpoints.print();
2049 }
2050
2051 return JVMTI_ERROR_NONE;
2052 } /* end ClearBreakpoint */
2053
2054
2055 //
2056 // Watched Field functions
2057 //
2058
2059 jvmtiError
2060 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2061 // make sure we haven't set this watch before
2062 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2063 fdesc_ptr->set_is_field_access_watched(true);
2064
2065 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2066
2067 return JVMTI_ERROR_NONE;
2068 } /* end SetFieldAccessWatch */
2069
2070
2071 jvmtiError
2072 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2073 // make sure we have a watch to clear
2074 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2075 fdesc_ptr->set_is_field_access_watched(false);
2076
2077 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2078
2079 return JVMTI_ERROR_NONE;
2080 } /* end ClearFieldAccessWatch */
2081
2082
2083 jvmtiError
2084 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2085 // make sure we haven't set this watch before
2086 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2087 fdesc_ptr->set_is_field_modification_watched(true);
2088
2089 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2090
2091 return JVMTI_ERROR_NONE;
2092 } /* end SetFieldModificationWatch */
2093
2094
2095 jvmtiError
2096 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2097 // make sure we have a watch to clear
2098 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2099 fdesc_ptr->set_is_field_modification_watched(false);
2100
2101 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2102
2103 return JVMTI_ERROR_NONE;
2104 } /* end ClearFieldModificationWatch */
2105
2106 //
2107 // Class functions
2108 //
2109
2110
2111 // k_mirror - may be primitive, this must be checked
2112 // signature_ptr - NULL is a valid value, must be checked
2113 // generic_ptr - NULL is a valid value, must be checked
2114 jvmtiError
2115 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2116 ResourceMark rm;
2117 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2118 Klass* k = NULL;
2119 if (!isPrimitive) {
2120 k = java_lang_Class::as_Klass(k_mirror);
2121 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2122 }
2123 if (signature_ptr != NULL) {
2124 char* result = NULL;
2125 if (isPrimitive) {
2126 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2127 result = (char*) jvmtiMalloc(2);
2128 result[0] = tchar;
2129 result[1] = '\0';
2130 } else {
2131 const char* class_sig = k->signature_name();
2132 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2133 strcpy(result, class_sig);
2134 }
2135 *signature_ptr = result;
2136 }
2137 if (generic_ptr != NULL) {
2138 *generic_ptr = NULL;
2139 if (!isPrimitive && k->oop_is_instance()) {
2140 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2141 if (soo != NULL) {
2142 const char *gen_sig = soo->as_C_string();
2143 if (gen_sig != NULL) {
2144 char* gen_result;
2145 jvmtiError err = allocate(strlen(gen_sig) + 1,
2146 (unsigned char **)&gen_result);
2147 if (err != JVMTI_ERROR_NONE) {
2148 return err;
2149 }
2150 strcpy(gen_result, gen_sig);
2151 *generic_ptr = gen_result;
2152 }
2153 }
2154 }
2155 }
2156 return JVMTI_ERROR_NONE;
2157 } /* end GetClassSignature */
2158
2159
2160 // k_mirror - may be primitive, this must be checked
2161 // status_ptr - pre-checked for NULL
2162 jvmtiError
2163 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2164 jint result = 0;
2165 if (java_lang_Class::is_primitive(k_mirror)) {
2166 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2167 } else {
2168 Klass* k = java_lang_Class::as_Klass(k_mirror);
2169 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2170 result = k->jvmti_class_status();
2171 }
2172 *status_ptr = result;
2173
2174 return JVMTI_ERROR_NONE;
2175 } /* end GetClassStatus */
2176
2177
2178 // k_mirror - may be primitive, this must be checked
2179 // source_name_ptr - pre-checked for NULL
2180 jvmtiError
2181 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2182 if (java_lang_Class::is_primitive(k_mirror)) {
2183 return JVMTI_ERROR_ABSENT_INFORMATION;
2184 }
2185 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2186 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2187
2188 if (!k_klass->oop_is_instance()) {
2189 return JVMTI_ERROR_ABSENT_INFORMATION;
2190 }
2191
2192 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2193 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2194 {
2195 JavaThread* current_thread = JavaThread::current();
2196 ResourceMark rm(current_thread);
2197 const char* sfncp = (const char*) sfnOop->as_C_string();
2198 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2199 strcpy(*source_name_ptr, sfncp);
2200 }
2201
2202 return JVMTI_ERROR_NONE;
2203 } /* end GetSourceFileName */
2204
2205
2206 // k_mirror - may be primitive, this must be checked
2207 // modifiers_ptr - pre-checked for NULL
2208 jvmtiError
2209 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2210 JavaThread* current_thread = JavaThread::current();
2211 jint result = 0;
2212 if (!java_lang_Class::is_primitive(k_mirror)) {
2213 Klass* k = java_lang_Class::as_Klass(k_mirror);
2214 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2215 result = k->compute_modifier_flags(current_thread);
2216 JavaThread* THREAD = current_thread; // pass to macros
2217 if (HAS_PENDING_EXCEPTION) {
2218 CLEAR_PENDING_EXCEPTION;
2219 return JVMTI_ERROR_INTERNAL;
2220 };
2221
2222 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2223 if(k->is_super()) {
2224 result |= JVM_ACC_SUPER;
2225 }
2226 } else {
2227 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2228 }
2229 *modifiers_ptr = result;
2230
2231 return JVMTI_ERROR_NONE;
2232 } /* end GetClassModifiers */
2233
2234
2235 // k_mirror - may be primitive, this must be checked
2236 // method_count_ptr - pre-checked for NULL
2237 // methods_ptr - pre-checked for NULL
2238 jvmtiError
2239 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2240 JavaThread* current_thread = JavaThread::current();
2241 HandleMark hm(current_thread);
2242
2243 if (java_lang_Class::is_primitive(k_mirror)) {
2244 *method_count_ptr = 0;
2245 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2246 return JVMTI_ERROR_NONE;
2247 }
2248 Klass* k = java_lang_Class::as_Klass(k_mirror);
2249 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2250
2251 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2252 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2253 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2254 }
2255
2256 if (!k->oop_is_instance()) {
2257 *method_count_ptr = 0;
2258 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2259 return JVMTI_ERROR_NONE;
2260 }
2261 instanceKlassHandle instanceK_h(current_thread, k);
2262 // Allocate the result and fill it in
2263 int result_length = instanceK_h->methods()->length();
2264 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2265 int index;
2266 if (JvmtiExport::can_maintain_original_method_order()) {
2267 // Use the original method ordering indices stored in the class, so we can emit
2268 // jmethodIDs in the order they appeared in the class file
2269 for (index = 0; index < result_length; index++) {
2270 Method* m = instanceK_h->methods()->at(index);
2271 int original_index = instanceK_h->method_ordering()->at(index);
2272 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2273 jmethodID id = m->jmethod_id();
2274 result_list[original_index] = id;
2275 }
2276 } else {
2277 // otherwise just copy in any order
2278 for (index = 0; index < result_length; index++) {
2279 Method* m = instanceK_h->methods()->at(index);
2280 jmethodID id = m->jmethod_id();
2281 result_list[index] = id;
2282 }
2283 }
2284 // Fill in return value.
2285 *method_count_ptr = result_length;
2286 *methods_ptr = result_list;
2287
2288 return JVMTI_ERROR_NONE;
2289 } /* end GetClassMethods */
2290
2291
2292 // k_mirror - may be primitive, this must be checked
2293 // field_count_ptr - pre-checked for NULL
2294 // fields_ptr - pre-checked for NULL
2295 jvmtiError
2296 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2297 if (java_lang_Class::is_primitive(k_mirror)) {
2298 *field_count_ptr = 0;
2299 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2300 return JVMTI_ERROR_NONE;
2301 }
2302 JavaThread* current_thread = JavaThread::current();
2303 HandleMark hm(current_thread);
2304 Klass* k = java_lang_Class::as_Klass(k_mirror);
2305 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2306
2307 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2308 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2309 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2310 }
2311
2312 if (!k->oop_is_instance()) {
2313 *field_count_ptr = 0;
2314 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2315 return JVMTI_ERROR_NONE;
2316 }
2317
2318
2319 instanceKlassHandle instanceK_h(current_thread, k);
2320
2321 int result_count = 0;
2322 // First, count the fields.
2323 FilteredFieldStream flds(instanceK_h, true, true);
2324 result_count = flds.field_count();
2325
2326 // Allocate the result and fill it in
2327 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2328 // The JVMTI spec requires fields in the order they occur in the class file,
2329 // this is the reverse order of what FieldStream hands out.
2330 int id_index = (result_count - 1);
2331
2332 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2333 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2334 instanceK_h, src_st.offset(),
2335 src_st.access_flags().is_static());
2336 }
2337 assert(id_index == -1, "just checking");
2338 // Fill in the results
2339 *field_count_ptr = result_count;
2340 *fields_ptr = result_list;
2341
2342 return JVMTI_ERROR_NONE;
2343 } /* end GetClassFields */
2344
2345
2346 // k_mirror - may be primitive, this must be checked
2347 // interface_count_ptr - pre-checked for NULL
2348 // interfaces_ptr - pre-checked for NULL
2349 jvmtiError
2350 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2351 {
2352 if (java_lang_Class::is_primitive(k_mirror)) {
2353 *interface_count_ptr = 0;
2354 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2355 return JVMTI_ERROR_NONE;
2356 }
2357 JavaThread* current_thread = JavaThread::current();
2358 HandleMark hm(current_thread);
2359 Klass* k = java_lang_Class::as_Klass(k_mirror);
2360 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2361
2362 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2363 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2364 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2365
2366 if (!k->oop_is_instance()) {
2367 *interface_count_ptr = 0;
2368 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2369 return JVMTI_ERROR_NONE;
2370 }
2371
2372 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2373 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2374 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2375 for (int i_index = 0; i_index < result_length; i_index += 1) {
2376 Klass* klass_at = interface_list->at(i_index);
2377 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2378 assert(klass_at->is_interface(), "interfaces must be interfaces");
2379 oop mirror_at = klass_at->java_mirror();
2380 Handle handle_at = Handle(current_thread, mirror_at);
2381 result_list[i_index] = (jclass) jni_reference(handle_at);
2382 }
2383 *interface_count_ptr = result_length;
2384 *interfaces_ptr = result_list;
2385 }
2386
2387 return JVMTI_ERROR_NONE;
2388 } /* end GetImplementedInterfaces */
2389
2390
2391 // k_mirror - may be primitive, this must be checked
2392 // minor_version_ptr - pre-checked for NULL
2393 // major_version_ptr - pre-checked for NULL
2394 jvmtiError
2395 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2396 if (java_lang_Class::is_primitive(k_mirror)) {
2397 return JVMTI_ERROR_ABSENT_INFORMATION;
2398 }
2399 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2400 Thread *thread = Thread::current();
2401 HandleMark hm(thread);
2402 KlassHandle klass(thread, k_oop);
2403
2404 jint status = klass->jvmti_class_status();
2405 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2406 return JVMTI_ERROR_INVALID_CLASS;
2407 }
2408 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2409 return JVMTI_ERROR_ABSENT_INFORMATION;
2410 }
2411
2412 instanceKlassHandle ik(thread, k_oop);
2413 *minor_version_ptr = ik->minor_version();
2414 *major_version_ptr = ik->major_version();
2415
2416 return JVMTI_ERROR_NONE;
2417 } /* end GetClassVersionNumbers */
2418
2419
2420 // k_mirror - may be primitive, this must be checked
2421 // constant_pool_count_ptr - pre-checked for NULL
2422 // constant_pool_byte_count_ptr - pre-checked for NULL
2423 // constant_pool_bytes_ptr - pre-checked for NULL
2424 jvmtiError
2425 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2426 if (java_lang_Class::is_primitive(k_mirror)) {
2427 return JVMTI_ERROR_ABSENT_INFORMATION;
2428 }
2429
2430 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2431 Thread *thread = Thread::current();
2432 HandleMark hm(thread);
2433 ResourceMark rm(thread);
2434 KlassHandle klass(thread, k_oop);
2435
2436 jint status = klass->jvmti_class_status();
2437 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2438 return JVMTI_ERROR_INVALID_CLASS;
2439 }
2440 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2441 return JVMTI_ERROR_ABSENT_INFORMATION;
2442 }
2443
2444 instanceKlassHandle ikh(thread, k_oop);
2445 JvmtiConstantPoolReconstituter reconstituter(ikh);
2446 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2447 return reconstituter.get_error();
2448 }
2449
2450 unsigned char *cpool_bytes;
2451 int cpool_size = reconstituter.cpool_size();
2452 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2453 return reconstituter.get_error();
2454 }
2455 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2456 if (res != JVMTI_ERROR_NONE) {
2457 return res;
2458 }
2459 reconstituter.copy_cpool_bytes(cpool_bytes);
2460 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2461 return reconstituter.get_error();
2462 }
2463
2464 constantPoolHandle constants(thread, ikh->constants());
2465 *constant_pool_count_ptr = constants->length();
2466 *constant_pool_byte_count_ptr = cpool_size;
2467 *constant_pool_bytes_ptr = cpool_bytes;
2468
2469 return JVMTI_ERROR_NONE;
2470 } /* end GetConstantPool */
2471
2472
2473 // k_mirror - may be primitive, this must be checked
2474 // is_interface_ptr - pre-checked for NULL
2475 jvmtiError
2476 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2477 {
2478 bool result = false;
2479 if (!java_lang_Class::is_primitive(k_mirror)) {
2480 Klass* k = java_lang_Class::as_Klass(k_mirror);
2481 if (k != NULL && k->is_interface()) {
2482 result = true;
2483 }
2484 }
2485 *is_interface_ptr = result;
2486 }
2487
2488 return JVMTI_ERROR_NONE;
2489 } /* end IsInterface */
2490
2491
2492 // k_mirror - may be primitive, this must be checked
2493 // is_array_class_ptr - pre-checked for NULL
2494 jvmtiError
2495 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2496 {
2497 bool result = false;
2498 if (!java_lang_Class::is_primitive(k_mirror)) {
2499 Klass* k = java_lang_Class::as_Klass(k_mirror);
2500 if (k != NULL && k->oop_is_array()) {
2501 result = true;
2502 }
2503 }
2504 *is_array_class_ptr = result;
2505 }
2506
2507 return JVMTI_ERROR_NONE;
2508 } /* end IsArrayClass */
2509
2510
2511 // k_mirror - may be primitive, this must be checked
2512 // classloader_ptr - pre-checked for NULL
2513 jvmtiError
2514 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2515 {
2516 if (java_lang_Class::is_primitive(k_mirror)) {
2517 *classloader_ptr = (jclass) jni_reference(Handle());
2518 return JVMTI_ERROR_NONE;
2519 }
2520 JavaThread* current_thread = JavaThread::current();
2521 HandleMark hm(current_thread);
2522 Klass* k = java_lang_Class::as_Klass(k_mirror);
2523 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2524
2525 oop result_oop = k->class_loader();
2526 if (result_oop == NULL) {
2527 *classloader_ptr = (jclass) jni_reference(Handle());
2528 return JVMTI_ERROR_NONE;
2529 }
2530 Handle result_handle = Handle(current_thread, result_oop);
2531 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2532 *classloader_ptr = result_jnihandle;
2533 }
2534 return JVMTI_ERROR_NONE;
2535 } /* end GetClassLoader */
2536
2537
2538 // k_mirror - may be primitive, this must be checked
2539 // source_debug_extension_ptr - pre-checked for NULL
2540 jvmtiError
2541 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2542 {
2543 if (java_lang_Class::is_primitive(k_mirror)) {
2544 return JVMTI_ERROR_ABSENT_INFORMATION;
2545 }
2546 Klass* k = java_lang_Class::as_Klass(k_mirror);
2547 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2548 if (!k->oop_is_instance()) {
2549 return JVMTI_ERROR_ABSENT_INFORMATION;
2550 }
2551 char* sde = InstanceKlass::cast(k)->source_debug_extension();
2552 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2553
2554 {
2555 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2556 strcpy(*source_debug_extension_ptr, sde);
2557 }
2558 }
2559
2560 return JVMTI_ERROR_NONE;
2561 } /* end GetSourceDebugExtension */
2562
2563 //
2564 // Object functions
2565 //
2566
2567 // hash_code_ptr - pre-checked for NULL
2568 jvmtiError
2569 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2570 oop mirror = JNIHandles::resolve_external_guard(object);
2571 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2572 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2573
2574 {
2575 jint result = (jint) mirror->identity_hash();
2576 *hash_code_ptr = result;
2577 }
2578 return JVMTI_ERROR_NONE;
2579 } /* end GetObjectHashCode */
2580
2581
2582 // info_ptr - pre-checked for NULL
2583 jvmtiError
2584 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2585 JavaThread* calling_thread = JavaThread::current();
2586 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2587 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2588 // Some of the critical threads were not suspended. go to a safepoint and try again
2589 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2590 VMThread::execute(&op);
2591 err = op.result();
2592 }
2593 return err;
2594 } /* end GetObjectMonitorUsage */
2595
2596
2597 //
2598 // Field functions
2599 //
2600
2601 // name_ptr - NULL is a valid value, must be checked
2602 // signature_ptr - NULL is a valid value, must be checked
2603 // generic_ptr - NULL is a valid value, must be checked
2604 jvmtiError
2605 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2606 JavaThread* current_thread = JavaThread::current();
2607 ResourceMark rm(current_thread);
2608 if (name_ptr == NULL) {
2609 // just don't return the name
2610 } else {
2611 const char* fieldName = fdesc_ptr->name()->as_C_string();
2612 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2613 if (*name_ptr == NULL)
2614 return JVMTI_ERROR_OUT_OF_MEMORY;
2615 strcpy(*name_ptr, fieldName);
2616 }
2617 if (signature_ptr== NULL) {
2618 // just don't return the signature
2619 } else {
2620 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2621 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2622 if (*signature_ptr == NULL)
2623 return JVMTI_ERROR_OUT_OF_MEMORY;
2624 strcpy(*signature_ptr, fieldSignature);
2625 }
2626 if (generic_ptr != NULL) {
2627 *generic_ptr = NULL;
2628 Symbol* soop = fdesc_ptr->generic_signature();
2629 if (soop != NULL) {
2630 const char* gen_sig = soop->as_C_string();
2631 if (gen_sig != NULL) {
2632 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2633 if (err != JVMTI_ERROR_NONE) {
2634 return err;
2635 }
2636 strcpy(*generic_ptr, gen_sig);
2637 }
2638 }
2639 }
2640 return JVMTI_ERROR_NONE;
2641 } /* end GetFieldName */
2642
2643
2644 // declaring_class_ptr - pre-checked for NULL
2645 jvmtiError
2646 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2647
2648 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2649 return JVMTI_ERROR_NONE;
2650 } /* end GetFieldDeclaringClass */
2651
2652
2653 // modifiers_ptr - pre-checked for NULL
2654 jvmtiError
2655 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2656
2657 AccessFlags resultFlags = fdesc_ptr->access_flags();
2658 jint result = resultFlags.as_int();
2659 *modifiers_ptr = result;
2660
2661 return JVMTI_ERROR_NONE;
2662 } /* end GetFieldModifiers */
2663
2664
2665 // is_synthetic_ptr - pre-checked for NULL
2666 jvmtiError
2667 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2668 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2669 return JVMTI_ERROR_NONE;
2670 } /* end IsFieldSynthetic */
2671
2672
2673 //
2674 // Method functions
2675 //
2676
2677 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2678 // name_ptr - NULL is a valid value, must be checked
2679 // signature_ptr - NULL is a valid value, must be checked
2680 // generic_ptr - NULL is a valid value, must be checked
2681 jvmtiError
2682 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2683 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2684 JavaThread* current_thread = JavaThread::current();
2685
2686 ResourceMark rm(current_thread); // get the utf8 name and signature
2687 if (name_ptr == NULL) {
2688 // just don't return the name
2689 } else {
2690 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2691 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2692 strcpy(*name_ptr, utf8_name);
2693 }
2694 if (signature_ptr == NULL) {
2695 // just don't return the signature
2696 } else {
2697 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2698 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2699 strcpy(*signature_ptr, utf8_signature);
2700 }
2701
2702 if (generic_ptr != NULL) {
2703 *generic_ptr = NULL;
2704 Symbol* soop = method_oop->generic_signature();
2705 if (soop != NULL) {
2706 const char* gen_sig = soop->as_C_string();
2707 if (gen_sig != NULL) {
2708 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2709 if (err != JVMTI_ERROR_NONE) {
2710 return err;
2711 }
2712 strcpy(*generic_ptr, gen_sig);
2713 }
2714 }
2715 }
2716 return JVMTI_ERROR_NONE;
2717 } /* end GetMethodName */
2718
2719
2720 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2721 // declaring_class_ptr - pre-checked for NULL
2722 jvmtiError
2723 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2724 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2725 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2726 return JVMTI_ERROR_NONE;
2727 } /* end GetMethodDeclaringClass */
2728
2729
2730 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2731 // modifiers_ptr - pre-checked for NULL
2732 jvmtiError
2733 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2734 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2735 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2736 return JVMTI_ERROR_NONE;
2737 } /* end GetMethodModifiers */
2738
2739
2740 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2741 // max_ptr - pre-checked for NULL
2742 jvmtiError
2743 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2744 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2745 // get max stack
2746 (*max_ptr) = method_oop->max_locals();
2747 return JVMTI_ERROR_NONE;
2748 } /* end GetMaxLocals */
2749
2750
2751 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2752 // size_ptr - pre-checked for NULL
2753 jvmtiError
2754 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2755 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2756 // get size of arguments
2757
2758 (*size_ptr) = method_oop->size_of_parameters();
2759 return JVMTI_ERROR_NONE;
2760 } /* end GetArgumentsSize */
2761
2762
2763 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2764 // entry_count_ptr - pre-checked for NULL
2765 // table_ptr - pre-checked for NULL
2766 jvmtiError
2767 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2768 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2769 if (!method_oop->has_linenumber_table()) {
2770 return (JVMTI_ERROR_ABSENT_INFORMATION);
2771 }
2772
2773 // The line number table is compressed so we don't know how big it is until decompressed.
2774 // Decompression is really fast so we just do it twice.
2775
2776 // Compute size of table
2777 jint num_entries = 0;
2778 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2779 while (stream.read_pair()) {
2780 num_entries++;
2781 }
2782 jvmtiLineNumberEntry *jvmti_table =
2783 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2784
2785 // Fill jvmti table
2786 if (num_entries > 0) {
2787 int index = 0;
2788 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2789 while (stream.read_pair()) {
2790 jvmti_table[index].start_location = (jlocation) stream.bci();
2791 jvmti_table[index].line_number = (jint) stream.line();
2792 index++;
2793 }
2794 assert(index == num_entries, "sanity check");
2795 }
2796
2797 // Set up results
2798 (*entry_count_ptr) = num_entries;
2799 (*table_ptr) = jvmti_table;
2800
2801 return JVMTI_ERROR_NONE;
2802 } /* end GetLineNumberTable */
2803
2804
2805 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2806 // start_location_ptr - pre-checked for NULL
2807 // end_location_ptr - pre-checked for NULL
2808 jvmtiError
2809 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2810
2811 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2812 // get start and end location
2813 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2814 if (method_oop->code_size() == 0) {
2815 // there is no code so there is no start location
2816 (*start_location_ptr) = (jlocation)(-1);
2817 } else {
2818 (*start_location_ptr) = (jlocation)(0);
2819 }
2820
2821 return JVMTI_ERROR_NONE;
2822 } /* end GetMethodLocation */
2823
2824
2825 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2826 // entry_count_ptr - pre-checked for NULL
2827 // table_ptr - pre-checked for NULL
2828 jvmtiError
2829 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2830
2831 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2832 JavaThread* current_thread = JavaThread::current();
2833
2834 // does the klass have any local variable information?
2835 InstanceKlass* ik = method_oop->method_holder();
2836 if (!ik->access_flags().has_localvariable_table()) {
2837 return (JVMTI_ERROR_ABSENT_INFORMATION);
2838 }
2839
2840 ConstantPool* constants = method_oop->constants();
2841 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2842
2843 // in the vm localvariable table representation, 6 consecutive elements in the table
2844 // represent a 6-tuple of shorts
2845 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2846 jint num_entries = method_oop->localvariable_table_length();
2847 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2848 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2849
2850 if (num_entries > 0) {
2851 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2852 for (int i = 0; i < num_entries; i++) {
2853 // get the 5 tuple information from the vm table
2854 jlocation start_location = (jlocation) table[i].start_bci;
2855 jint length = (jint) table[i].length;
2856 int name_index = (int) table[i].name_cp_index;
2857 int signature_index = (int) table[i].descriptor_cp_index;
2858 int generic_signature_index = (int) table[i].signature_cp_index;
2859 jint slot = (jint) table[i].slot;
2860
2861 // get utf8 name and signature
2862 char *name_buf = NULL;
2863 char *sig_buf = NULL;
2864 char *gen_sig_buf = NULL;
2865 {
2866 ResourceMark rm(current_thread);
2867
2868 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2869 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2870 strcpy(name_buf, utf8_name);
2871
2872 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2873 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2874 strcpy(sig_buf, utf8_signature);
2875
2876 if (generic_signature_index > 0) {
2877 const char *utf8_gen_sign = (const char *)
2878 constants->symbol_at(generic_signature_index)->as_utf8();
2879 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2880 strcpy(gen_sig_buf, utf8_gen_sign);
2881 }
2882 }
2883
2884 // fill in the jvmti local variable table
2885 jvmti_table[i].start_location = start_location;
2886 jvmti_table[i].length = length;
2887 jvmti_table[i].name = name_buf;
2888 jvmti_table[i].signature = sig_buf;
2889 jvmti_table[i].generic_signature = gen_sig_buf;
2890 jvmti_table[i].slot = slot;
2891 }
2892 }
2893
2894 // set results
2895 (*entry_count_ptr) = num_entries;
2896 (*table_ptr) = jvmti_table;
2897
2898 return JVMTI_ERROR_NONE;
2899 } /* end GetLocalVariableTable */
2900
2901
2902 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2903 // bytecode_count_ptr - pre-checked for NULL
2904 // bytecodes_ptr - pre-checked for NULL
2905 jvmtiError
2906 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2907 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2908
2909 HandleMark hm;
2910 methodHandle method(method_oop);
2911 jint size = (jint)method->code_size();
2912 jvmtiError err = allocate(size, bytecodes_ptr);
2913 if (err != JVMTI_ERROR_NONE) {
2914 return err;
2915 }
2916
2917 (*bytecode_count_ptr) = size;
2918 // get byte codes
2919 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2920
2921 return JVMTI_ERROR_NONE;
2922 } /* end GetBytecodes */
2923
2924
2925 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2926 // is_native_ptr - pre-checked for NULL
2927 jvmtiError
2928 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2929 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2930 (*is_native_ptr) = method_oop->is_native();
2931 return JVMTI_ERROR_NONE;
2932 } /* end IsMethodNative */
2933
2934
2935 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2936 // is_synthetic_ptr - pre-checked for NULL
2937 jvmtiError
2938 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
2939 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2940 (*is_synthetic_ptr) = method_oop->is_synthetic();
2941 return JVMTI_ERROR_NONE;
2942 } /* end IsMethodSynthetic */
2943
2944
2945 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2946 // is_obsolete_ptr - pre-checked for NULL
2947 jvmtiError
2948 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
2949 if (use_version_1_0_semantics() &&
2950 get_capabilities()->can_redefine_classes == 0) {
2951 // This JvmtiEnv requested version 1.0 semantics and this function
2952 // requires the can_redefine_classes capability in version 1.0 so
2953 // we need to return an error here.
2954 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2955 }
2956
2957 if (method_oop == NULL || method_oop->is_obsolete()) {
2958 *is_obsolete_ptr = true;
2959 } else {
2960 *is_obsolete_ptr = false;
2961 }
2962 return JVMTI_ERROR_NONE;
2963 } /* end IsMethodObsolete */
2964
2965 //
2966 // Raw Monitor functions
2967 //
2968
2969 // name - pre-checked for NULL
2970 // monitor_ptr - pre-checked for NULL
2971 jvmtiError
2972 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
2973 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
2974 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
2975
2976 *monitor_ptr = (jrawMonitorID)rmonitor;
2977
2978 return JVMTI_ERROR_NONE;
2979 } /* end CreateRawMonitor */
2980
2981
2982 // rmonitor - pre-checked for validity
2983 jvmtiError
2984 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
2985 if (Threads::number_of_threads() == 0) {
2986 // Remove this monitor from pending raw monitors list
2987 // if it has entered in onload or start phase.
2988 JvmtiPendingMonitors::destroy(rmonitor);
2989 } else {
2990 Thread* thread = Thread::current();
2991 if (rmonitor->is_entered(thread)) {
2992 // The caller owns this monitor which we are about to destroy.
2993 // We exit the underlying synchronization object so that the
2994 // "delete monitor" call below can work without an assertion
2995 // failure on systems that don't like destroying synchronization
2996 // objects that are locked.
2997 int r;
2998 intptr_t recursion = rmonitor->recursions();
2999 for (intptr_t i=0; i <= recursion; i++) {
3000 r = rmonitor->raw_exit(thread);
3001 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3002 if (r != ObjectMonitor::OM_OK) { // robustness
3003 return JVMTI_ERROR_INTERNAL;
3004 }
3005 }
3006 }
3007 if (rmonitor->owner() != NULL) {
3008 // The caller is trying to destroy a monitor that is locked by
3009 // someone else. While this is not forbidden by the JVMTI
3010 // spec, it will cause an assertion failure on systems that don't
3011 // like destroying synchronization objects that are locked.
3012 // We indicate a problem with the error return (and leak the
3013 // monitor's memory).
3014 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3015 }
3016 }
3017
3018 delete rmonitor;
3019
3020 return JVMTI_ERROR_NONE;
3021 } /* end DestroyRawMonitor */
3022
3023
3024 // rmonitor - pre-checked for validity
3025 jvmtiError
3026 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3027 if (Threads::number_of_threads() == 0) {
3028 // No JavaThreads exist so ObjectMonitor enter cannot be
3029 // used, add this raw monitor to the pending list.
3030 // The pending monitors will be actually entered when
3031 // the VM is setup.
3032 // See transition_pending_raw_monitors in create_vm()
3033 // in thread.cpp.
3034 JvmtiPendingMonitors::enter(rmonitor);
3035 } else {
3036 int r;
3037 Thread* thread = Thread::current();
3038
3039 if (thread->is_Java_thread()) {
3040 JavaThread* current_thread = (JavaThread*)thread;
3041
3042 #ifdef PROPER_TRANSITIONS
3043 // Not really unknown but ThreadInVMfromNative does more than we want
3044 ThreadInVMfromUnknown __tiv;
3045 {
3046 ThreadBlockInVM __tbivm(current_thread);
3047 r = rmonitor->raw_enter(current_thread);
3048 }
3049 #else
3050 /* Transition to thread_blocked without entering vm state */
3051 /* This is really evil. Normally you can't undo _thread_blocked */
3052 /* transitions like this because it would cause us to miss a */
3053 /* safepoint but since the thread was already in _thread_in_native */
3054 /* the thread is not leaving a safepoint safe state and it will */
3055 /* block when it tries to return from native. We can't safepoint */
3056 /* block in here because we could deadlock the vmthread. Blech. */
3057
3058 JavaThreadState state = current_thread->thread_state();
3059 assert(state == _thread_in_native, "Must be _thread_in_native");
3060 // frame should already be walkable since we are in native
3061 assert(!current_thread->has_last_Java_frame() ||
3062 current_thread->frame_anchor()->walkable(), "Must be walkable");
3063 current_thread->set_thread_state(_thread_blocked);
3064
3065 r = rmonitor->raw_enter(current_thread);
3066 // restore state, still at a safepoint safe state
3067 current_thread->set_thread_state(state);
3068
3069 #endif /* PROPER_TRANSITIONS */
3070 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3071 } else {
3072 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3073 r = rmonitor->raw_enter(thread);
3074 } else {
3075 ShouldNotReachHere();
3076 }
3077 }
3078
3079 if (r != ObjectMonitor::OM_OK) { // robustness
3080 return JVMTI_ERROR_INTERNAL;
3081 }
3082 }
3083 return JVMTI_ERROR_NONE;
3084 } /* end RawMonitorEnter */
3085
3086
3087 // rmonitor - pre-checked for validity
3088 jvmtiError
3089 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3090 jvmtiError err = JVMTI_ERROR_NONE;
3091
3092 if (Threads::number_of_threads() == 0) {
3093 // No JavaThreads exist so just remove this monitor from the pending list.
3094 // Bool value from exit is false if rmonitor is not in the list.
3095 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3096 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3097 }
3098 } else {
3099 int r;
3100 Thread* thread = Thread::current();
3101
3102 if (thread->is_Java_thread()) {
3103 JavaThread* current_thread = (JavaThread*)thread;
3104 #ifdef PROPER_TRANSITIONS
3105 // Not really unknown but ThreadInVMfromNative does more than we want
3106 ThreadInVMfromUnknown __tiv;
3107 #endif /* PROPER_TRANSITIONS */
3108 r = rmonitor->raw_exit(current_thread);
3109 } else {
3110 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3111 r = rmonitor->raw_exit(thread);
3112 } else {
3113 ShouldNotReachHere();
3114 }
3115 }
3116
3117 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3118 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3119 } else {
3120 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3121 if (r != ObjectMonitor::OM_OK) { // robustness
3122 err = JVMTI_ERROR_INTERNAL;
3123 }
3124 }
3125 }
3126 return err;
3127 } /* end RawMonitorExit */
3128
3129
3130 // rmonitor - pre-checked for validity
3131 jvmtiError
3132 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3133 int r;
3134 Thread* thread = Thread::current();
3135
3136 if (thread->is_Java_thread()) {
3137 JavaThread* current_thread = (JavaThread*)thread;
3138 #ifdef PROPER_TRANSITIONS
3139 // Not really unknown but ThreadInVMfromNative does more than we want
3140 ThreadInVMfromUnknown __tiv;
3141 {
3142 ThreadBlockInVM __tbivm(current_thread);
3143 r = rmonitor->raw_wait(millis, true, current_thread);
3144 }
3145 #else
3146 /* Transition to thread_blocked without entering vm state */
3147 /* This is really evil. Normally you can't undo _thread_blocked */
3148 /* transitions like this because it would cause us to miss a */
3149 /* safepoint but since the thread was already in _thread_in_native */
3150 /* the thread is not leaving a safepoint safe state and it will */
3151 /* block when it tries to return from native. We can't safepoint */
3152 /* block in here because we could deadlock the vmthread. Blech. */
3153
3154 JavaThreadState state = current_thread->thread_state();
3155 assert(state == _thread_in_native, "Must be _thread_in_native");
3156 // frame should already be walkable since we are in native
3157 assert(!current_thread->has_last_Java_frame() ||
3158 current_thread->frame_anchor()->walkable(), "Must be walkable");
3159 current_thread->set_thread_state(_thread_blocked);
3160
3161 r = rmonitor->raw_wait(millis, true, current_thread);
3162 // restore state, still at a safepoint safe state
3163 current_thread->set_thread_state(state);
3164
3165 #endif /* PROPER_TRANSITIONS */
3166 } else {
3167 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3168 r = rmonitor->raw_wait(millis, true, thread);
3169 } else {
3170 ShouldNotReachHere();
3171 }
3172 }
3173
3174 switch (r) {
3175 case ObjectMonitor::OM_INTERRUPTED:
3176 return JVMTI_ERROR_INTERRUPT;
3177 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3178 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3179 }
3180 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3181 if (r != ObjectMonitor::OM_OK) { // robustness
3182 return JVMTI_ERROR_INTERNAL;
3183 }
3184
3185 return JVMTI_ERROR_NONE;
3186 } /* end RawMonitorWait */
3187
3188
3189 // rmonitor - pre-checked for validity
3190 jvmtiError
3191 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3192 int r;
3193 Thread* thread = Thread::current();
3194
3195 if (thread->is_Java_thread()) {
3196 JavaThread* current_thread = (JavaThread*)thread;
3197 // Not really unknown but ThreadInVMfromNative does more than we want
3198 ThreadInVMfromUnknown __tiv;
3199 r = rmonitor->raw_notify(current_thread);
3200 } else {
3201 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3202 r = rmonitor->raw_notify(thread);
3203 } else {
3204 ShouldNotReachHere();
3205 }
3206 }
3207
3208 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3209 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3210 }
3211 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3212 if (r != ObjectMonitor::OM_OK) { // robustness
3213 return JVMTI_ERROR_INTERNAL;
3214 }
3215
3216 return JVMTI_ERROR_NONE;
3217 } /* end RawMonitorNotify */
3218
3219
3220 // rmonitor - pre-checked for validity
3221 jvmtiError
3222 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3223 int r;
3224 Thread* thread = Thread::current();
3225
3226 if (thread->is_Java_thread()) {
3227 JavaThread* current_thread = (JavaThread*)thread;
3228 ThreadInVMfromUnknown __tiv;
3229 r = rmonitor->raw_notifyAll(current_thread);
3230 } else {
3231 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3232 r = rmonitor->raw_notifyAll(thread);
3233 } else {
3234 ShouldNotReachHere();
3235 }
3236 }
3237
3238 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3239 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3240 }
3241 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3242 if (r != ObjectMonitor::OM_OK) { // robustness
3243 return JVMTI_ERROR_INTERNAL;
3244 }
3245
3246 return JVMTI_ERROR_NONE;
3247 } /* end RawMonitorNotifyAll */
3248
3249
3250 //
3251 // JNI Function Interception functions
3252 //
3253
3254
3255 // function_table - pre-checked for NULL
3256 jvmtiError
3257 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3258 // Copy jni function table at safepoint.
3259 VM_JNIFunctionTableCopier copier(function_table);
3260 VMThread::execute(&copier);
3261
3262 return JVMTI_ERROR_NONE;
3263 } /* end SetJNIFunctionTable */
3264
3265
3266 // function_table - pre-checked for NULL
3267 jvmtiError
3268 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3269 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3270 if (*function_table == NULL)
3271 return JVMTI_ERROR_OUT_OF_MEMORY;
3272 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3273 return JVMTI_ERROR_NONE;
3274 } /* end GetJNIFunctionTable */
3275
3276
3277 //
3278 // Event Management functions
3279 //
3280
3281 jvmtiError
3282 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3283 // can only generate two event types
3284 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3285 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3286 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3287 }
3288
3289 // for compiled_method_load events we must check that the environment
3290 // has the can_generate_compiled_method_load_events capability.
3291 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3292 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3293 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3294 }
3295 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3296 } else {
3297 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3298 }
3299
3300 } /* end GenerateEvents */
3301
3302
3303 //
3304 // Extension Mechanism functions
3305 //
3306
3307 // extension_count_ptr - pre-checked for NULL
3308 // extensions - pre-checked for NULL
3309 jvmtiError
3310 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3311 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3312 } /* end GetExtensionFunctions */
3313
3314
3315 // extension_count_ptr - pre-checked for NULL
3316 // extensions - pre-checked for NULL
3317 jvmtiError
3318 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3319 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3320 } /* end GetExtensionEvents */
3321
3322
3323 // callback - NULL is a valid value, must be checked
3324 jvmtiError
3325 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3326 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3327 } /* end SetExtensionEventCallback */
3328
3329 //
3330 // Timers functions
3331 //
3332
3333 // info_ptr - pre-checked for NULL
3334 jvmtiError
3335 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3336 os::current_thread_cpu_time_info(info_ptr);
3337 return JVMTI_ERROR_NONE;
3338 } /* end GetCurrentThreadCpuTimerInfo */
3339
3340
3341 // nanos_ptr - pre-checked for NULL
3342 jvmtiError
3343 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3344 *nanos_ptr = os::current_thread_cpu_time();
3345 return JVMTI_ERROR_NONE;
3346 } /* end GetCurrentThreadCpuTime */
3347
3348
3349 // info_ptr - pre-checked for NULL
3350 jvmtiError
3351 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3352 os::thread_cpu_time_info(info_ptr);
3353 return JVMTI_ERROR_NONE;
3354 } /* end GetThreadCpuTimerInfo */
3355
3356
3357 // Threads_lock NOT held, java_thread not protected by lock
3358 // java_thread - pre-checked
3359 // nanos_ptr - pre-checked for NULL
3360 jvmtiError
3361 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3362 *nanos_ptr = os::thread_cpu_time(java_thread);
3363 return JVMTI_ERROR_NONE;
3364 } /* end GetThreadCpuTime */
3365
3366
3367 // info_ptr - pre-checked for NULL
3368 jvmtiError
3369 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3370 os::javaTimeNanos_info(info_ptr);
3371 return JVMTI_ERROR_NONE;
3372 } /* end GetTimerInfo */
3373
3374
3375 // nanos_ptr - pre-checked for NULL
3376 jvmtiError
3377 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3378 *nanos_ptr = os::javaTimeNanos();
3379 return JVMTI_ERROR_NONE;
3380 } /* end GetTime */
3381
3382
3383 // processor_count_ptr - pre-checked for NULL
3384 jvmtiError
3385 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3386 *processor_count_ptr = os::active_processor_count();
3387 return JVMTI_ERROR_NONE;
3388 } /* end GetAvailableProcessors */
3389
3390 //
3391 // System Properties functions
3392 //
3393
3394 // count_ptr - pre-checked for NULL
3395 // property_ptr - pre-checked for NULL
3396 jvmtiError
3397 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3398 jvmtiError err = JVMTI_ERROR_NONE;
3399
3400 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3401
3402 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3403 if (err != JVMTI_ERROR_NONE) {
3404 return err;
3405 }
3406 int i = 0 ;
3407 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3408 const char *key = p->key();
3409 char **tmp_value = *property_ptr+i;
3410 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3411 if (err == JVMTI_ERROR_NONE) {
3412 strcpy(*tmp_value, key);
3413 } else {
3414 // clean up previously allocated memory.
3415 for (int j=0; j<i; j++) {
3416 Deallocate((unsigned char*)*property_ptr+j);
3417 }
3418 Deallocate((unsigned char*)property_ptr);
3419 break;
3420 }
3421 }
3422 return err;
3423 } /* end GetSystemProperties */
3424
3425
3426 // property - pre-checked for NULL
3427 // value_ptr - pre-checked for NULL
3428 jvmtiError
3429 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3430 jvmtiError err = JVMTI_ERROR_NONE;
3431 const char *value;
3432
3433 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3434 if (value == NULL) {
3435 err = JVMTI_ERROR_NOT_AVAILABLE;
3436 } else {
3437 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3438 if (err == JVMTI_ERROR_NONE) {
3439 strcpy(*value_ptr, value);
3440 }
3441 }
3442 return err;
3443 } /* end GetSystemProperty */
3444
3445
3446 // property - pre-checked for NULL
3447 // value - NULL is a valid value, must be checked
3448 jvmtiError
3449 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3450 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3451
3452 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3453 if (strcmp(property, p->key()) == 0) {
3454 if (p->set_value((char *)value_ptr)) {
3455 err = JVMTI_ERROR_NONE;
3456 }
3457 }
3458 }
3459 return err;
3460 } /* end SetSystemProperty */