1 /*
2 * Copyright (c) 2003, 2015, 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/classLoaderExt.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "interpreter/bytecodeStream.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "logging/log.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/instanceKlass.hpp"
36 #include "oops/objArrayOop.inline.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jniCheck.hpp"
39 #include "prims/jvm_misc.hpp"
40 #include "prims/jvmtiAgentThread.hpp"
41 #include "prims/jvmtiClassFileReconstituter.hpp"
42 #include "prims/jvmtiCodeBlobEvents.hpp"
43 #include "prims/jvmtiExtensions.hpp"
44 #include "prims/jvmtiGetLoadedClasses.hpp"
45 #include "prims/jvmtiImpl.hpp"
46 #include "prims/jvmtiManageCapabilities.hpp"
47 #include "prims/jvmtiRawMonitor.hpp"
48 #include "prims/jvmtiRedefineClasses.hpp"
49 #include "prims/jvmtiTagMap.hpp"
50 #include "prims/jvmtiThreadState.inline.hpp"
51 #include "prims/jvmtiUtil.hpp"
52 #include "runtime/arguments.hpp"
53 #include "runtime/deoptimization.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/jfieldIDWorkaround.hpp"
57 #include "runtime/osThread.hpp"
58 #include "runtime/reflectionUtils.hpp"
59 #include "runtime/signature.hpp"
60 #include "runtime/thread.inline.hpp"
61 #include "runtime/vframe.hpp"
62 #include "runtime/vmThread.hpp"
63 #include "services/threadService.hpp"
64 #include "utilities/exceptions.hpp"
65 #include "utilities/preserveException.hpp"
66
67
68 #define FIXLATER 0 // REMOVE this when completed.
69
70 // FIXLATER: hook into JvmtiTrace
71 #define TraceJVMTICalls false
72
73 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
74 }
75
76 JvmtiEnv::~JvmtiEnv() {
77 }
78
79 JvmtiEnv*
80 JvmtiEnv::create_a_jvmti(jint version) {
81 return new JvmtiEnv(version);
82 }
83
84 // VM operation class to copy jni function table at safepoint.
85 // More than one java threads or jvmti agents may be reading/
86 // modifying jni function tables. To reduce the risk of bad
87 // interaction b/w these threads it is copied at safepoint.
88 class VM_JNIFunctionTableCopier : public VM_Operation {
89 private:
90 const struct JNINativeInterface_ *_function_table;
91 public:
92 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
93 _function_table = func_tbl;
94 };
95
96 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
97 void doit() {
98 copy_jni_function_table(_function_table);
99 };
100 };
101
102 //
103 // Do not change the "prefix" marker below, everything above it is copied
104 // unchanged into the filled stub, everything below is controlled by the
105 // stub filler (only method bodies are carried forward, and then only for
106 // functionality still in the spec).
107 //
108 // end file prefix
109
110 //
111 // Memory Management functions
112 //
113
114 // mem_ptr - pre-checked for NULL
115 jvmtiError
116 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
117 return allocate(size, mem_ptr);
118 } /* end Allocate */
119
120
121 // mem - NULL is a valid value, must be checked
122 jvmtiError
123 JvmtiEnv::Deallocate(unsigned char* mem) {
124 return deallocate(mem);
125 } /* end Deallocate */
126
127 // Threads_lock NOT held, java_thread not protected by lock
128 // java_thread - pre-checked
129 // data - NULL is a valid value, must be checked
130 jvmtiError
131 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
132 JvmtiThreadState* state = java_thread->jvmti_thread_state();
133 if (state == NULL) {
134 if (data == NULL) {
135 // leaving state unset same as data set to NULL
136 return JVMTI_ERROR_NONE;
137 }
138 // otherwise, create the state
139 state = JvmtiThreadState::state_for(java_thread);
140 if (state == NULL) {
141 return JVMTI_ERROR_THREAD_NOT_ALIVE;
142 }
143 }
144 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
145 return JVMTI_ERROR_NONE;
146 } /* end SetThreadLocalStorage */
147
148
149 // Threads_lock NOT held
150 // thread - NOT pre-checked
151 // data_ptr - pre-checked for NULL
152 jvmtiError
153 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
154 JavaThread* current_thread = JavaThread::current();
155 if (thread == NULL) {
156 JvmtiThreadState* state = current_thread->jvmti_thread_state();
157 *data_ptr = (state == NULL) ? NULL :
158 state->env_thread_state(this)->get_agent_thread_local_storage_data();
159 } else {
160
161 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
162 // the thread to _thread_in_vm. However, when the TLS for a thread
163 // other than the current thread is required we need to transition
164 // from native so as to resolve the jthread.
165
166 ThreadInVMfromNative __tiv(current_thread);
167 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
168 debug_only(VMNativeEntryWrapper __vew;)
169
170 oop thread_oop = JNIHandles::resolve_external_guard(thread);
171 if (thread_oop == NULL) {
172 return JVMTI_ERROR_INVALID_THREAD;
173 }
174 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
175 return JVMTI_ERROR_INVALID_THREAD;
176 }
177 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
178 if (java_thread == NULL) {
179 return JVMTI_ERROR_THREAD_NOT_ALIVE;
180 }
181 JvmtiThreadState* state = java_thread->jvmti_thread_state();
182 *data_ptr = (state == NULL) ? NULL :
183 state->env_thread_state(this)->get_agent_thread_local_storage_data();
184 }
185 return JVMTI_ERROR_NONE;
186 } /* end GetThreadLocalStorage */
187
188 //
189 // Class functions
190 //
191
192 // class_count_ptr - pre-checked for NULL
193 // classes_ptr - pre-checked for NULL
194 jvmtiError
195 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
196 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
197 } /* end GetLoadedClasses */
198
199
200 // initiating_loader - NULL is a valid value, must be checked
201 // class_count_ptr - pre-checked for NULL
202 // classes_ptr - pre-checked for NULL
203 jvmtiError
204 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
205 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
206 class_count_ptr, classes_ptr);
207 } /* end GetClassLoaderClasses */
208
209 // k_mirror - may be primitive, this must be checked
210 // is_modifiable_class_ptr - pre-checked for NULL
211 jvmtiError
212 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
213 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
214 JNI_TRUE : JNI_FALSE;
215 return JVMTI_ERROR_NONE;
216 } /* end IsModifiableClass */
217
218 // class_count - pre-checked to be greater than or equal to 0
219 // classes - pre-checked for NULL
220 jvmtiError
221 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
222 //TODO: add locking
223
224 int index;
225 JavaThread* current_thread = JavaThread::current();
226 ResourceMark rm(current_thread);
227
228 jvmtiClassDefinition* class_definitions =
229 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
230 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
231
232 for (index = 0; index < class_count; index++) {
233 HandleMark hm(current_thread);
234
235 jclass jcls = classes[index];
236 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
237 if (k_mirror == NULL) {
238 return JVMTI_ERROR_INVALID_CLASS;
239 }
240 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
241 return JVMTI_ERROR_INVALID_CLASS;
242 }
243
244 if (java_lang_Class::is_primitive(k_mirror)) {
245 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
246 }
247
248 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
249 KlassHandle klass(current_thread, k_oop);
250
251 jint status = klass->jvmti_class_status();
252 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
253 return JVMTI_ERROR_INVALID_CLASS;
254 }
255 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
256 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
257 }
258
259 instanceKlassHandle ikh(current_thread, k_oop);
260 if (ikh->get_cached_class_file_bytes() == NULL) {
261 // Not cached, we need to reconstitute the class file from the
262 // VM representation. We don't attach the reconstituted class
263 // bytes to the InstanceKlass here because they have not been
264 // validated and we're not at a safepoint.
265 JvmtiClassFileReconstituter reconstituter(ikh);
266 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
267 return reconstituter.get_error();
268 }
269
270 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
271 class_definitions[index].class_bytes = (unsigned char*)
272 reconstituter.class_file_bytes();
273 } else {
274 // it is cached, get it from the cache
275 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
276 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
277 }
278 class_definitions[index].klass = jcls;
279 }
280 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
281 VMThread::execute(&op);
282 return (op.check_error());
283 } /* end RetransformClasses */
284
285
286 // class_count - pre-checked to be greater than or equal to 0
287 // class_definitions - pre-checked for NULL
288 jvmtiError
289 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
290 //TODO: add locking
291 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
292 VMThread::execute(&op);
293 return (op.check_error());
294 } /* end RedefineClasses */
295
296
297 //
298 // Object functions
299 //
300
301 // size_ptr - pre-checked for NULL
302 jvmtiError
303 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
304 oop mirror = JNIHandles::resolve_external_guard(object);
305 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
306
307 if (mirror->klass() == SystemDictionary::Class_klass() &&
308 !java_lang_Class::is_primitive(mirror)) {
309 Klass* k = java_lang_Class::as_Klass(mirror);
310 assert(k != NULL, "class for non-primitive mirror must exist");
311 *size_ptr = (jlong)k->size() * wordSize;
312 } else {
313 *size_ptr = (jlong)mirror->size() * wordSize;
314 }
315 return JVMTI_ERROR_NONE;
316 } /* end GetObjectSize */
317
318 //
319 // Method functions
320 //
321
322 // prefix - NULL is a valid value, must be checked
323 jvmtiError
324 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
325 return prefix == NULL?
326 SetNativeMethodPrefixes(0, NULL) :
327 SetNativeMethodPrefixes(1, (char**)&prefix);
328 } /* end SetNativeMethodPrefix */
329
330
331 // prefix_count - pre-checked to be greater than or equal to 0
332 // prefixes - pre-checked for NULL
333 jvmtiError
334 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
335 // Have to grab JVMTI thread state lock to be sure that some thread
336 // isn't accessing the prefixes at the same time we are setting them.
337 // No locks during VM bring-up.
338 if (Threads::number_of_threads() == 0) {
339 return set_native_method_prefixes(prefix_count, prefixes);
340 } else {
341 MutexLocker mu(JvmtiThreadState_lock);
342 return set_native_method_prefixes(prefix_count, prefixes);
343 }
344 } /* end SetNativeMethodPrefixes */
345
346 //
347 // Event Management functions
348 //
349
350 // callbacks - NULL is a valid value, must be checked
351 // size_of_callbacks - pre-checked to be greater than or equal to 0
352 jvmtiError
353 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
354 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
355 return JVMTI_ERROR_NONE;
356 } /* end SetEventCallbacks */
357
358
359 // event_thread - NULL is a valid value, must be checked
360 jvmtiError
361 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
362 JavaThread* java_thread = NULL;
363 if (event_thread != NULL) {
364 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
365 if (thread_oop == NULL) {
366 return JVMTI_ERROR_INVALID_THREAD;
367 }
368 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
369 return JVMTI_ERROR_INVALID_THREAD;
370 }
371 java_thread = java_lang_Thread::thread(thread_oop);
372 if (java_thread == NULL) {
373 return JVMTI_ERROR_THREAD_NOT_ALIVE;
374 }
375 }
376
377 // event_type must be valid
378 if (!JvmtiEventController::is_valid_event_type(event_type)) {
379 return JVMTI_ERROR_INVALID_EVENT_TYPE;
380 }
381
382 // global events cannot be controlled at thread level.
383 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
384 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
385 }
386
387 bool enabled = (mode == JVMTI_ENABLE);
388
389 // assure that needed capabilities are present
390 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
391 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
392 }
393
394 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
395 record_class_file_load_hook_enabled();
396 }
397 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
398
399 return JVMTI_ERROR_NONE;
400 } /* end SetEventNotificationMode */
401
402 //
403 // Capability functions
404 //
405
406 // capabilities_ptr - pre-checked for NULL
407 jvmtiError
408 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
409 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
410 get_prohibited_capabilities(),
411 capabilities_ptr);
412 return JVMTI_ERROR_NONE;
413 } /* end GetPotentialCapabilities */
414
415
416 // capabilities_ptr - pre-checked for NULL
417 jvmtiError
418 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
419 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
420 get_prohibited_capabilities(),
421 capabilities_ptr,
422 get_capabilities());
423 } /* end AddCapabilities */
424
425
426 // capabilities_ptr - pre-checked for NULL
427 jvmtiError
428 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
429 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
430 return JVMTI_ERROR_NONE;
431 } /* end RelinquishCapabilities */
432
433
434 // capabilities_ptr - pre-checked for NULL
435 jvmtiError
436 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
437 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
438 return JVMTI_ERROR_NONE;
439 } /* end GetCapabilities */
440
441 //
442 // Class Loader Search functions
443 //
444
445 // segment - pre-checked for NULL
446 jvmtiError
447 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
448 jvmtiPhase phase = get_phase();
449 if (phase == JVMTI_PHASE_ONLOAD) {
450 Arguments::append_sysclasspath(segment);
451 return JVMTI_ERROR_NONE;
452 } else if (use_version_1_0_semantics()) {
453 // This JvmtiEnv requested version 1.0 semantics and this function
454 // is only allowed in the ONLOAD phase in version 1.0 so we need to
455 // return an error here.
456 return JVMTI_ERROR_WRONG_PHASE;
457 } else if (phase == JVMTI_PHASE_LIVE) {
458 // The phase is checked by the wrapper that called this function,
459 // but this thread could be racing with the thread that is
460 // terminating the VM so we check one more time.
461
462 // create the zip entry
463 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
464 if (zip_entry == NULL) {
465 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
466 }
467
468 // lock the loader
469 Thread* thread = Thread::current();
470 HandleMark hm;
471 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
472
473 ObjectLocker ol(loader_lock, thread);
474
475 // add the jar file to the bootclasspath
476 if (TraceClassLoading) {
477 tty->print_cr("[Opened %s]", zip_entry->name());
478 }
479 if (log_is_enabled(Debug, classload)) {
480 outputStream* log = LogHandle(classload)::debug_stream();
481 log->print_cr("[Opened %s]", zip_entry->name());
482 }
483 ClassLoaderExt::append_boot_classpath(zip_entry);
484 return JVMTI_ERROR_NONE;
485 } else {
486 return JVMTI_ERROR_WRONG_PHASE;
487 }
488
489 } /* end AddToBootstrapClassLoaderSearch */
490
491
492 // segment - pre-checked for NULL
493 jvmtiError
494 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
495 jvmtiPhase phase = get_phase();
496
497 if (phase == JVMTI_PHASE_ONLOAD) {
498 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
499 if (strcmp("java.class.path", p->key()) == 0) {
500 p->append_value(segment);
501 break;
502 }
503 }
504 return JVMTI_ERROR_NONE;
505 } else if (phase == JVMTI_PHASE_LIVE) {
506 // The phase is checked by the wrapper that called this function,
507 // but this thread could be racing with the thread that is
508 // terminating the VM so we check one more time.
509 HandleMark hm;
510
511 // create the zip entry (which will open the zip file and hence
512 // check that the segment is indeed a zip file).
513 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
514 if (zip_entry == NULL) {
515 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
516 }
517 delete zip_entry; // no longer needed
518
519 // lock the loader
520 Thread* THREAD = Thread::current();
521 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
522
523 ObjectLocker ol(loader, THREAD);
524
525 // need the path as java.lang.String
526 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
527 if (HAS_PENDING_EXCEPTION) {
528 CLEAR_PENDING_EXCEPTION;
529 return JVMTI_ERROR_INTERNAL;
530 }
531
532 instanceKlassHandle loader_ik(THREAD, loader->klass());
533
534 // Invoke the appendToClassPathForInstrumentation method - if the method
535 // is not found it means the loader doesn't support adding to the class path
536 // in the live phase.
537 {
538 JavaValue res(T_VOID);
539 JavaCalls::call_special(&res,
540 loader,
541 loader_ik,
542 vmSymbols::appendToClassPathForInstrumentation_name(),
543 vmSymbols::appendToClassPathForInstrumentation_signature(),
544 path,
545 THREAD);
546 if (HAS_PENDING_EXCEPTION) {
547 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
548 CLEAR_PENDING_EXCEPTION;
549
550 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
551 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
552 } else {
553 return JVMTI_ERROR_INTERNAL;
554 }
555 }
556 }
557
558 return JVMTI_ERROR_NONE;
559 } else {
560 return JVMTI_ERROR_WRONG_PHASE;
561 }
562 } /* end AddToSystemClassLoaderSearch */
563
564 //
565 // General functions
566 //
567
568 // phase_ptr - pre-checked for NULL
569 jvmtiError
570 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
571 *phase_ptr = get_phase();
572 return JVMTI_ERROR_NONE;
573 } /* end GetPhase */
574
575
576 jvmtiError
577 JvmtiEnv::DisposeEnvironment() {
578 dispose();
579 return JVMTI_ERROR_NONE;
580 } /* end DisposeEnvironment */
581
582
583 // data - NULL is a valid value, must be checked
584 jvmtiError
585 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
586 set_env_local_storage(data);
587 return JVMTI_ERROR_NONE;
588 } /* end SetEnvironmentLocalStorage */
589
590
591 // data_ptr - pre-checked for NULL
592 jvmtiError
593 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
594 *data_ptr = (void*)get_env_local_storage();
595 return JVMTI_ERROR_NONE;
596 } /* end GetEnvironmentLocalStorage */
597
598 // version_ptr - pre-checked for NULL
599 jvmtiError
600 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
601 *version_ptr = JVMTI_VERSION;
602 return JVMTI_ERROR_NONE;
603 } /* end GetVersionNumber */
604
605
606 // name_ptr - pre-checked for NULL
607 jvmtiError
608 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
609 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
610 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
611 }
612 const char *name = JvmtiUtil::error_name(error);
613 if (name == NULL) {
614 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
615 }
616 size_t len = strlen(name) + 1;
617 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
618 if (err == JVMTI_ERROR_NONE) {
619 memcpy(*name_ptr, name, len);
620 }
621 return err;
622 } /* end GetErrorName */
623
624
625 jvmtiError
626 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
627 switch (flag) {
628 case JVMTI_VERBOSE_OTHER:
629 // ignore
630 break;
631 case JVMTI_VERBOSE_CLASS:
632 TraceClassLoading = value != 0;
633 TraceClassUnloading = value != 0;
634 break;
635 case JVMTI_VERBOSE_GC:
636 PrintGC = value != 0;
637 break;
638 case JVMTI_VERBOSE_JNI:
639 PrintJNIResolving = value != 0;
640 break;
641 default:
642 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
643 };
644 return JVMTI_ERROR_NONE;
645 } /* end SetVerboseFlag */
646
647
648 // format_ptr - pre-checked for NULL
649 jvmtiError
650 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
651 *format_ptr = JVMTI_JLOCATION_JVMBCI;
652 return JVMTI_ERROR_NONE;
653 } /* end GetJLocationFormat */
654
655 //
656 // Thread functions
657 //
658
659 // Threads_lock NOT held
660 // thread - NOT pre-checked
661 // thread_state_ptr - pre-checked for NULL
662 jvmtiError
663 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
664 jint state;
665 oop thread_oop;
666 JavaThread* thr;
667
668 if (thread == NULL) {
669 thread_oop = JavaThread::current()->threadObj();
670 } else {
671 thread_oop = JNIHandles::resolve_external_guard(thread);
672 }
673
674 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
675 return JVMTI_ERROR_INVALID_THREAD;
676 }
677
678 // get most state bits
679 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
680
681 // add more state bits
682 thr = java_lang_Thread::thread(thread_oop);
683 if (thr != NULL) {
684 JavaThreadState jts = thr->thread_state();
685
686 if (thr->is_being_ext_suspended()) {
687 state |= JVMTI_THREAD_STATE_SUSPENDED;
688 }
689 if (jts == _thread_in_native) {
690 state |= JVMTI_THREAD_STATE_IN_NATIVE;
691 }
692 OSThread* osThread = thr->osthread();
693 if (osThread != NULL && osThread->interrupted()) {
694 state |= JVMTI_THREAD_STATE_INTERRUPTED;
695 }
696 }
697
698 *thread_state_ptr = state;
699 return JVMTI_ERROR_NONE;
700 } /* end GetThreadState */
701
702
703 // thread_ptr - pre-checked for NULL
704 jvmtiError
705 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
706 JavaThread* current_thread = JavaThread::current();
707 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
708 return JVMTI_ERROR_NONE;
709 } /* end GetCurrentThread */
710
711
712 // threads_count_ptr - pre-checked for NULL
713 // threads_ptr - pre-checked for NULL
714 jvmtiError
715 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
716 int nthreads = 0;
717 Handle *thread_objs = NULL;
718 ResourceMark rm;
719 HandleMark hm;
720
721 // enumerate threads (including agent threads)
722 ThreadsListEnumerator tle(Thread::current(), true);
723 nthreads = tle.num_threads();
724 *threads_count_ptr = nthreads;
725
726 if (nthreads == 0) {
727 *threads_ptr = NULL;
728 return JVMTI_ERROR_NONE;
729 }
730
731 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
732 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
733
734 for (int i=0; i < nthreads; i++) {
735 thread_objs[i] = Handle(tle.get_threadObj(i));
736 }
737
738 // have to make global handles outside of Threads_lock
739 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
740 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
741
742 *threads_ptr = jthreads;
743 return JVMTI_ERROR_NONE;
744 } /* end GetAllThreads */
745
746
747 // Threads_lock NOT held, java_thread not protected by lock
748 // java_thread - pre-checked
749 jvmtiError
750 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
751 // don't allow hidden thread suspend request.
752 if (java_thread->is_hidden_from_external_view()) {
753 return (JVMTI_ERROR_NONE);
754 }
755
756 {
757 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
758 if (java_thread->is_external_suspend()) {
759 // don't allow nested external suspend requests.
760 return (JVMTI_ERROR_THREAD_SUSPENDED);
761 }
762 if (java_thread->is_exiting()) { // thread is in the process of exiting
763 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
764 }
765 java_thread->set_external_suspend();
766 }
767
768 if (!JvmtiSuspendControl::suspend(java_thread)) {
769 // the thread was in the process of exiting
770 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
771 }
772 return JVMTI_ERROR_NONE;
773 } /* end SuspendThread */
774
775
776 // request_count - pre-checked to be greater than or equal to 0
777 // request_list - pre-checked for NULL
778 // results - pre-checked for NULL
779 jvmtiError
780 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
781 int needSafepoint = 0; // > 0 if we need a safepoint
782 for (int i = 0; i < request_count; i++) {
783 JavaThread *java_thread = get_JavaThread(request_list[i]);
784 if (java_thread == NULL) {
785 results[i] = JVMTI_ERROR_INVALID_THREAD;
786 continue;
787 }
788 // the thread has not yet run or has exited (not on threads list)
789 if (java_thread->threadObj() == NULL) {
790 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
791 continue;
792 }
793 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
794 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
795 continue;
796 }
797 // don't allow hidden thread suspend request.
798 if (java_thread->is_hidden_from_external_view()) {
799 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
800 continue;
801 }
802
803 {
804 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
805 if (java_thread->is_external_suspend()) {
806 // don't allow nested external suspend requests.
807 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
808 continue;
809 }
810 if (java_thread->is_exiting()) { // thread is in the process of exiting
811 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
812 continue;
813 }
814 java_thread->set_external_suspend();
815 }
816 if (java_thread->thread_state() == _thread_in_native) {
817 // We need to try and suspend native threads here. Threads in
818 // other states will self-suspend on their next transition.
819 if (!JvmtiSuspendControl::suspend(java_thread)) {
820 // The thread was in the process of exiting. Force another
821 // safepoint to make sure that this thread transitions.
822 needSafepoint++;
823 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
824 continue;
825 }
826 } else {
827 needSafepoint++;
828 }
829 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
830 }
831 if (needSafepoint > 0) {
832 VM_ForceSafepoint vfs;
833 VMThread::execute(&vfs);
834 }
835 // per-thread suspend results returned via results parameter
836 return JVMTI_ERROR_NONE;
837 } /* end SuspendThreadList */
838
839
840 // Threads_lock NOT held, java_thread not protected by lock
841 // java_thread - pre-checked
842 jvmtiError
843 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
844 // don't allow hidden thread resume request.
845 if (java_thread->is_hidden_from_external_view()) {
846 return JVMTI_ERROR_NONE;
847 }
848
849 if (!java_thread->is_being_ext_suspended()) {
850 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
851 }
852
853 if (!JvmtiSuspendControl::resume(java_thread)) {
854 return JVMTI_ERROR_INTERNAL;
855 }
856 return JVMTI_ERROR_NONE;
857 } /* end ResumeThread */
858
859
860 // request_count - pre-checked to be greater than or equal to 0
861 // request_list - pre-checked for NULL
862 // results - pre-checked for NULL
863 jvmtiError
864 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
865 for (int i = 0; i < request_count; i++) {
866 JavaThread *java_thread = get_JavaThread(request_list[i]);
867 if (java_thread == NULL) {
868 results[i] = JVMTI_ERROR_INVALID_THREAD;
869 continue;
870 }
871 // don't allow hidden thread resume request.
872 if (java_thread->is_hidden_from_external_view()) {
873 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
874 continue;
875 }
876 if (!java_thread->is_being_ext_suspended()) {
877 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
878 continue;
879 }
880
881 if (!JvmtiSuspendControl::resume(java_thread)) {
882 results[i] = JVMTI_ERROR_INTERNAL;
883 continue;
884 }
885
886 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
887 }
888 // per-thread resume results returned via results parameter
889 return JVMTI_ERROR_NONE;
890 } /* end ResumeThreadList */
891
892
893 // Threads_lock NOT held, java_thread not protected by lock
894 // java_thread - pre-checked
895 jvmtiError
896 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
897 oop e = JNIHandles::resolve_external_guard(exception);
898 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
899
900 JavaThread::send_async_exception(java_thread->threadObj(), e);
901
902 return JVMTI_ERROR_NONE;
903
904 } /* end StopThread */
905
906
907 // Threads_lock NOT held
908 // thread - NOT pre-checked
909 jvmtiError
910 JvmtiEnv::InterruptThread(jthread thread) {
911 oop thread_oop = JNIHandles::resolve_external_guard(thread);
912 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
913 return JVMTI_ERROR_INVALID_THREAD;
914
915 JavaThread* current_thread = JavaThread::current();
916
917 // Todo: this is a duplicate of JVM_Interrupt; share code in future
918 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
919 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
920 // We need to re-resolve the java_thread, since a GC might have happened during the
921 // acquire of the lock
922
923 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
924 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
925
926 Thread::interrupt(java_thread);
927
928 return JVMTI_ERROR_NONE;
929 } /* end InterruptThread */
930
931
932 // Threads_lock NOT held
933 // thread - NOT pre-checked
934 // info_ptr - pre-checked for NULL
935 jvmtiError
936 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
937 ResourceMark rm;
938 HandleMark hm;
939
940 JavaThread* current_thread = JavaThread::current();
941
942 // if thread is NULL the current thread is used
943 oop thread_oop;
944 if (thread == NULL) {
945 thread_oop = current_thread->threadObj();
946 } else {
947 thread_oop = JNIHandles::resolve_external_guard(thread);
948 }
949 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
950 return JVMTI_ERROR_INVALID_THREAD;
951
952 Handle thread_obj(current_thread, thread_oop);
953 Handle name;
954 ThreadPriority priority;
955 Handle thread_group;
956 Handle context_class_loader;
957 bool is_daemon;
958
959 { MutexLocker mu(Threads_lock);
960
961 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
962 priority = java_lang_Thread::priority(thread_obj());
963 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
964 is_daemon = java_lang_Thread::is_daemon(thread_obj());
965
966 oop loader = java_lang_Thread::context_class_loader(thread_obj());
967 context_class_loader = Handle(current_thread, loader);
968 }
969 { const char *n;
970
971 if (name() != NULL) {
972 n = java_lang_String::as_utf8_string(name());
973 } else {
974 n = UNICODE::as_utf8(NULL, 0);
975 }
976
977 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
978 if (info_ptr->name == NULL)
979 return JVMTI_ERROR_OUT_OF_MEMORY;
980
981 strcpy(info_ptr->name, n);
982 }
983 info_ptr->is_daemon = is_daemon;
984 info_ptr->priority = priority;
985
986 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
987 jni_reference(context_class_loader);
988 info_ptr->thread_group = jni_reference(thread_group);
989
990 return JVMTI_ERROR_NONE;
991 } /* end GetThreadInfo */
992
993
994 // Threads_lock NOT held, java_thread not protected by lock
995 // java_thread - pre-checked
996 // owned_monitor_count_ptr - pre-checked for NULL
997 // owned_monitors_ptr - pre-checked for NULL
998 jvmtiError
999 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1000 jvmtiError err = JVMTI_ERROR_NONE;
1001 JavaThread* calling_thread = JavaThread::current();
1002
1003 // growable array of jvmti monitors info on the C-heap
1004 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1005 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1006
1007 // It is only safe to perform the direct operation on the current
1008 // thread. All other usage needs to use a vm-safepoint-op for safety.
1009 if (java_thread == calling_thread) {
1010 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1011 } else {
1012 // JVMTI get monitors info at safepoint. Do not require target thread to
1013 // be suspended.
1014 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1015 VMThread::execute(&op);
1016 err = op.result();
1017 }
1018 jint owned_monitor_count = owned_monitors_list->length();
1019 if (err == JVMTI_ERROR_NONE) {
1020 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1021 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1022 // copy into the returned array
1023 for (int i = 0; i < owned_monitor_count; i++) {
1024 (*owned_monitors_ptr)[i] =
1025 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1026 }
1027 *owned_monitor_count_ptr = owned_monitor_count;
1028 }
1029 }
1030 // clean up.
1031 for (int i = 0; i < owned_monitor_count; i++) {
1032 deallocate((unsigned char*)owned_monitors_list->at(i));
1033 }
1034 delete owned_monitors_list;
1035
1036 return err;
1037 } /* end GetOwnedMonitorInfo */
1038
1039
1040 // Threads_lock NOT held, java_thread not protected by lock
1041 // java_thread - pre-checked
1042 // monitor_info_count_ptr - pre-checked for NULL
1043 // monitor_info_ptr - pre-checked for NULL
1044 jvmtiError
1045 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1046 jvmtiError err = JVMTI_ERROR_NONE;
1047 JavaThread* calling_thread = JavaThread::current();
1048
1049 // growable array of jvmti monitors info on the C-heap
1050 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1051 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1052
1053 // It is only safe to perform the direct operation on the current
1054 // thread. All other usage needs to use a vm-safepoint-op for safety.
1055 if (java_thread == calling_thread) {
1056 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1057 } else {
1058 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1059 // be suspended.
1060 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1061 VMThread::execute(&op);
1062 err = op.result();
1063 }
1064
1065 jint owned_monitor_count = owned_monitors_list->length();
1066 if (err == JVMTI_ERROR_NONE) {
1067 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1068 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1069 // copy to output array.
1070 for (int i = 0; i < owned_monitor_count; i++) {
1071 (*monitor_info_ptr)[i].monitor =
1072 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1073 (*monitor_info_ptr)[i].stack_depth =
1074 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1075 }
1076 }
1077 *monitor_info_count_ptr = owned_monitor_count;
1078 }
1079
1080 // clean up.
1081 for (int i = 0; i < owned_monitor_count; i++) {
1082 deallocate((unsigned char*)owned_monitors_list->at(i));
1083 }
1084 delete owned_monitors_list;
1085
1086 return err;
1087 } /* end GetOwnedMonitorStackDepthInfo */
1088
1089
1090 // Threads_lock NOT held, java_thread not protected by lock
1091 // java_thread - pre-checked
1092 // monitor_ptr - pre-checked for NULL
1093 jvmtiError
1094 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1095 jvmtiError err = JVMTI_ERROR_NONE;
1096 JavaThread* calling_thread = JavaThread::current();
1097
1098 // It is only safe to perform the direct operation on the current
1099 // thread. All other usage needs to use a vm-safepoint-op for safety.
1100 if (java_thread == calling_thread) {
1101 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1102 } else {
1103 // get contended monitor information at safepoint.
1104 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1105 VMThread::execute(&op);
1106 err = op.result();
1107 }
1108 return err;
1109 } /* end GetCurrentContendedMonitor */
1110
1111
1112 // Threads_lock NOT held
1113 // thread - NOT pre-checked
1114 // proc - pre-checked for NULL
1115 // arg - NULL is a valid value, must be checked
1116 jvmtiError
1117 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1118 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1119 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1120 return JVMTI_ERROR_INVALID_THREAD;
1121 }
1122 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1123 return JVMTI_ERROR_INVALID_PRIORITY;
1124 }
1125
1126 //Thread-self
1127 JavaThread* current_thread = JavaThread::current();
1128
1129 Handle thread_hndl(current_thread, thread_oop);
1130 {
1131 MutexLocker mu(Threads_lock); // grab Threads_lock
1132
1133 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1134
1135 // At this point it may be possible that no osthread was created for the
1136 // JavaThread due to lack of memory.
1137 if (new_thread == NULL || new_thread->osthread() == NULL) {
1138 if (new_thread) delete new_thread;
1139 return JVMTI_ERROR_OUT_OF_MEMORY;
1140 }
1141
1142 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1143 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1144 java_lang_Thread::set_daemon(thread_hndl());
1145
1146 new_thread->set_threadObj(thread_hndl());
1147 Threads::add(new_thread);
1148 Thread::start(new_thread);
1149 } // unlock Threads_lock
1150
1151 return JVMTI_ERROR_NONE;
1152 } /* end RunAgentThread */
1153
1154 //
1155 // Thread Group functions
1156 //
1157
1158 // group_count_ptr - pre-checked for NULL
1159 // groups_ptr - pre-checked for NULL
1160 jvmtiError
1161 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1162 JavaThread* current_thread = JavaThread::current();
1163
1164 // Only one top level thread group now.
1165 *group_count_ptr = 1;
1166
1167 // Allocate memory to store global-refs to the thread groups.
1168 // Assume this area is freed by caller.
1169 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1170
1171 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1172
1173 // Convert oop to Handle, then convert Handle to global-ref.
1174 {
1175 HandleMark hm(current_thread);
1176 Handle system_thread_group(current_thread, Universe::system_thread_group());
1177 *groups_ptr[0] = jni_reference(system_thread_group);
1178 }
1179
1180 return JVMTI_ERROR_NONE;
1181 } /* end GetTopThreadGroups */
1182
1183
1184 // info_ptr - pre-checked for NULL
1185 jvmtiError
1186 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1187 ResourceMark rm;
1188 HandleMark hm;
1189
1190 JavaThread* current_thread = JavaThread::current();
1191
1192 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1193 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1194
1195 typeArrayHandle name;
1196 Handle parent_group;
1197 bool is_daemon;
1198 ThreadPriority max_priority;
1199
1200 { MutexLocker mu(Threads_lock);
1201
1202 name = typeArrayHandle(current_thread,
1203 java_lang_ThreadGroup::name(group_obj()));
1204 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1205 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1206 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1207 }
1208
1209 info_ptr->is_daemon = is_daemon;
1210 info_ptr->max_priority = max_priority;
1211 info_ptr->parent = jni_reference(parent_group);
1212
1213 if (name() != NULL) {
1214 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
1215 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
1216 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1217 strcpy(info_ptr->name, n);
1218 } else {
1219 info_ptr->name = NULL;
1220 }
1221
1222 return JVMTI_ERROR_NONE;
1223 } /* end GetThreadGroupInfo */
1224
1225
1226 // thread_count_ptr - pre-checked for NULL
1227 // threads_ptr - pre-checked for NULL
1228 // group_count_ptr - pre-checked for NULL
1229 // groups_ptr - pre-checked for NULL
1230 jvmtiError
1231 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1232 JavaThread* current_thread = JavaThread::current();
1233 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1234 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1235
1236 Handle *thread_objs = NULL;
1237 Handle *group_objs = NULL;
1238 int nthreads = 0;
1239 int ngroups = 0;
1240 int hidden_threads = 0;
1241
1242 ResourceMark rm;
1243 HandleMark hm;
1244
1245 Handle group_hdl(current_thread, group_obj);
1246
1247 { MutexLocker mu(Threads_lock);
1248
1249 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1250 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1251
1252 if (nthreads > 0) {
1253 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1254 assert(nthreads <= threads->length(), "too many threads");
1255 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1256 for (int i=0, j=0; i<nthreads; i++) {
1257 oop thread_obj = threads->obj_at(i);
1258 assert(thread_obj != NULL, "thread_obj is NULL");
1259 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1260 // Filter out hidden java threads.
1261 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1262 hidden_threads++;
1263 continue;
1264 }
1265 thread_objs[j++] = Handle(current_thread, thread_obj);
1266 }
1267 nthreads -= hidden_threads;
1268 }
1269 if (ngroups > 0) {
1270 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1271 assert(ngroups <= groups->length(), "too many threads");
1272 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1273 for (int i=0; i<ngroups; i++) {
1274 oop group_obj = groups->obj_at(i);
1275 assert(group_obj != NULL, "group_obj != NULL");
1276 group_objs[i] = Handle(current_thread, group_obj);
1277 }
1278 }
1279 }
1280
1281 // have to make global handles outside of Threads_lock
1282 *group_count_ptr = ngroups;
1283 *thread_count_ptr = nthreads;
1284 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1285 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1286 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1287 return JVMTI_ERROR_OUT_OF_MEMORY;
1288 }
1289 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1290 return JVMTI_ERROR_OUT_OF_MEMORY;
1291 }
1292
1293 return JVMTI_ERROR_NONE;
1294 } /* end GetThreadGroupChildren */
1295
1296
1297 //
1298 // Stack Frame functions
1299 //
1300
1301 // Threads_lock NOT held, java_thread not protected by lock
1302 // java_thread - pre-checked
1303 // max_frame_count - pre-checked to be greater than or equal to 0
1304 // frame_buffer - pre-checked for NULL
1305 // count_ptr - pre-checked for NULL
1306 jvmtiError
1307 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1308 jvmtiError err = JVMTI_ERROR_NONE;
1309
1310 // It is only safe to perform the direct operation on the current
1311 // thread. All other usage needs to use a vm-safepoint-op for safety.
1312 if (java_thread == JavaThread::current()) {
1313 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1314 } else {
1315 // JVMTI get stack trace at safepoint. Do not require target thread to
1316 // be suspended.
1317 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1318 VMThread::execute(&op);
1319 err = op.result();
1320 }
1321
1322 return err;
1323 } /* end GetStackTrace */
1324
1325
1326 // max_frame_count - pre-checked to be greater than or equal to 0
1327 // stack_info_ptr - pre-checked for NULL
1328 // thread_count_ptr - pre-checked for NULL
1329 jvmtiError
1330 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1331 jvmtiError err = JVMTI_ERROR_NONE;
1332 JavaThread* calling_thread = JavaThread::current();
1333
1334 // JVMTI get stack traces at safepoint.
1335 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1336 VMThread::execute(&op);
1337 *thread_count_ptr = op.final_thread_count();
1338 *stack_info_ptr = op.stack_info();
1339 err = op.result();
1340 return err;
1341 } /* end GetAllStackTraces */
1342
1343
1344 // thread_count - pre-checked to be greater than or equal to 0
1345 // thread_list - pre-checked for NULL
1346 // max_frame_count - pre-checked to be greater than or equal to 0
1347 // stack_info_ptr - pre-checked for NULL
1348 jvmtiError
1349 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1350 jvmtiError err = JVMTI_ERROR_NONE;
1351 // JVMTI get stack traces at safepoint.
1352 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1353 VMThread::execute(&op);
1354 err = op.result();
1355 if (err == JVMTI_ERROR_NONE) {
1356 *stack_info_ptr = op.stack_info();
1357 }
1358 return err;
1359 } /* end GetThreadListStackTraces */
1360
1361
1362 // Threads_lock NOT held, java_thread not protected by lock
1363 // java_thread - pre-checked
1364 // count_ptr - pre-checked for NULL
1365 jvmtiError
1366 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1367 jvmtiError err = JVMTI_ERROR_NONE;
1368
1369 // retrieve or create JvmtiThreadState.
1370 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1371 if (state == NULL) {
1372 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1373 }
1374
1375 // It is only safe to perform the direct operation on the current
1376 // thread. All other usage needs to use a vm-safepoint-op for safety.
1377 if (java_thread == JavaThread::current()) {
1378 err = get_frame_count(state, count_ptr);
1379 } else {
1380 // get java stack frame count at safepoint.
1381 VM_GetFrameCount op(this, state, count_ptr);
1382 VMThread::execute(&op);
1383 err = op.result();
1384 }
1385 return err;
1386 } /* end GetFrameCount */
1387
1388
1389 // Threads_lock NOT held, java_thread not protected by lock
1390 // java_thread - pre-checked
1391 jvmtiError
1392 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1393 JavaThread* current_thread = JavaThread::current();
1394 HandleMark hm(current_thread);
1395 uint32_t debug_bits = 0;
1396
1397 // retrieve or create the state
1398 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1399 if (state == NULL) {
1400 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1401 }
1402
1403 // Check if java_thread is fully suspended
1404 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1405 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1406 }
1407 // Check to see if a PopFrame was already in progress
1408 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1409 // Probably possible for JVMTI clients to trigger this, but the
1410 // JPDA backend shouldn't allow this to happen
1411 return JVMTI_ERROR_INTERNAL;
1412 }
1413
1414 {
1415 // Was workaround bug
1416 // 4812902: popFrame hangs if the method is waiting at a synchronize
1417 // Catch this condition and return an error to avoid hanging.
1418 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1419 OSThread* osThread = java_thread->osthread();
1420 if (osThread->get_state() == MONITOR_WAIT) {
1421 return JVMTI_ERROR_OPAQUE_FRAME;
1422 }
1423 }
1424
1425 {
1426 ResourceMark rm(current_thread);
1427 // Check if there are more than one Java frame in this thread, that the top two frames
1428 // are Java (not native) frames, and that there is no intervening VM frame
1429 int frame_count = 0;
1430 bool is_interpreted[2];
1431 intptr_t *frame_sp[2];
1432 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1433 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1434 methodHandle mh(current_thread, vfs.method());
1435 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1436 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1437 frame_sp[frame_count] = vfs.frame_id();
1438 if (++frame_count > 1) break;
1439 }
1440 if (frame_count < 2) {
1441 // We haven't found two adjacent non-native Java frames on the top.
1442 // There can be two situations here:
1443 // 1. There are no more java frames
1444 // 2. Two top java frames are separated by non-java native frames
1445 if(vframeFor(java_thread, 1) == NULL) {
1446 return JVMTI_ERROR_NO_MORE_FRAMES;
1447 } else {
1448 // Intervening non-java native or VM frames separate java frames.
1449 // Current implementation does not support this. See bug #5031735.
1450 // In theory it is possible to pop frames in such cases.
1451 return JVMTI_ERROR_OPAQUE_FRAME;
1452 }
1453 }
1454
1455 // If any of the top 2 frames is a compiled one, need to deoptimize it
1456 for (int i = 0; i < 2; i++) {
1457 if (!is_interpreted[i]) {
1458 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1459 }
1460 }
1461
1462 // Update the thread state to reflect that the top frame is popped
1463 // so that cur_stack_depth is maintained properly and all frameIDs
1464 // are invalidated.
1465 // The current frame will be popped later when the suspended thread
1466 // is resumed and right before returning from VM to Java.
1467 // (see call_VM_base() in assembler_<cpu>.cpp).
1468
1469 // It's fine to update the thread state here because no JVMTI events
1470 // shall be posted for this PopFrame.
1471
1472 // It is only safe to perform the direct operation on the current
1473 // thread. All other usage needs to use a vm-safepoint-op for safety.
1474 if (java_thread == JavaThread::current()) {
1475 state->update_for_pop_top_frame();
1476 } else {
1477 VM_UpdateForPopTopFrame op(state);
1478 VMThread::execute(&op);
1479 jvmtiError err = op.result();
1480 if (err != JVMTI_ERROR_NONE) {
1481 return err;
1482 }
1483 }
1484
1485 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1486 // Set pending step flag for this popframe and it is cleared when next
1487 // step event is posted.
1488 state->set_pending_step_for_popframe();
1489 }
1490
1491 return JVMTI_ERROR_NONE;
1492 } /* end PopFrame */
1493
1494
1495 // Threads_lock NOT held, java_thread not protected by lock
1496 // java_thread - pre-checked
1497 // java_thread - unchecked
1498 // depth - pre-checked as non-negative
1499 // method_ptr - pre-checked for NULL
1500 // location_ptr - pre-checked for NULL
1501 jvmtiError
1502 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1503 jvmtiError err = JVMTI_ERROR_NONE;
1504
1505 // It is only safe to perform the direct operation on the current
1506 // thread. All other usage needs to use a vm-safepoint-op for safety.
1507 if (java_thread == JavaThread::current()) {
1508 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1509 } else {
1510 // JVMTI get java stack frame location at safepoint.
1511 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1512 VMThread::execute(&op);
1513 err = op.result();
1514 }
1515 return err;
1516 } /* end GetFrameLocation */
1517
1518
1519 // Threads_lock NOT held, java_thread not protected by lock
1520 // java_thread - pre-checked
1521 // java_thread - unchecked
1522 // depth - pre-checked as non-negative
1523 jvmtiError
1524 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1525 jvmtiError err = JVMTI_ERROR_NONE;
1526 ResourceMark rm;
1527 uint32_t debug_bits = 0;
1528
1529 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1530 if (state == NULL) {
1531 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1532 }
1533
1534 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1535 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1536 }
1537
1538 if (TraceJVMTICalls) {
1539 JvmtiSuspendControl::print();
1540 }
1541
1542 vframe *vf = vframeFor(java_thread, depth);
1543 if (vf == NULL) {
1544 return JVMTI_ERROR_NO_MORE_FRAMES;
1545 }
1546
1547 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1548 return JVMTI_ERROR_OPAQUE_FRAME;
1549 }
1550
1551 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1552
1553 // It is only safe to perform the direct operation on the current
1554 // thread. All other usage needs to use a vm-safepoint-op for safety.
1555 if (java_thread == JavaThread::current()) {
1556 int frame_number = state->count_frames() - depth;
1557 state->env_thread_state(this)->set_frame_pop(frame_number);
1558 } else {
1559 VM_SetFramePop op(this, state, depth);
1560 VMThread::execute(&op);
1561 err = op.result();
1562 }
1563 return err;
1564 } /* end NotifyFramePop */
1565
1566
1567 //
1568 // Force Early Return functions
1569 //
1570
1571 // Threads_lock NOT held, java_thread not protected by lock
1572 // java_thread - pre-checked
1573 jvmtiError
1574 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1575 jvalue val;
1576 val.l = value;
1577 return force_early_return(java_thread, val, atos);
1578 } /* end ForceEarlyReturnObject */
1579
1580
1581 // Threads_lock NOT held, java_thread not protected by lock
1582 // java_thread - pre-checked
1583 jvmtiError
1584 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1585 jvalue val;
1586 val.i = value;
1587 return force_early_return(java_thread, val, itos);
1588 } /* end ForceEarlyReturnInt */
1589
1590
1591 // Threads_lock NOT held, java_thread not protected by lock
1592 // java_thread - pre-checked
1593 jvmtiError
1594 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1595 jvalue val;
1596 val.j = value;
1597 return force_early_return(java_thread, val, ltos);
1598 } /* end ForceEarlyReturnLong */
1599
1600
1601 // Threads_lock NOT held, java_thread not protected by lock
1602 // java_thread - pre-checked
1603 jvmtiError
1604 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1605 jvalue val;
1606 val.f = value;
1607 return force_early_return(java_thread, val, ftos);
1608 } /* end ForceEarlyReturnFloat */
1609
1610
1611 // Threads_lock NOT held, java_thread not protected by lock
1612 // java_thread - pre-checked
1613 jvmtiError
1614 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1615 jvalue val;
1616 val.d = value;
1617 return force_early_return(java_thread, val, dtos);
1618 } /* end ForceEarlyReturnDouble */
1619
1620
1621 // Threads_lock NOT held, java_thread not protected by lock
1622 // java_thread - pre-checked
1623 jvmtiError
1624 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1625 jvalue val;
1626 val.j = 0L;
1627 return force_early_return(java_thread, val, vtos);
1628 } /* end ForceEarlyReturnVoid */
1629
1630
1631 //
1632 // Heap functions
1633 //
1634
1635 // klass - NULL is a valid value, must be checked
1636 // initial_object - NULL is a valid value, must be checked
1637 // callbacks - pre-checked for NULL
1638 // user_data - NULL is a valid value, must be checked
1639 jvmtiError
1640 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1641 // check klass if provided
1642 Klass* k_oop = NULL;
1643 if (klass != NULL) {
1644 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1645 if (k_mirror == NULL) {
1646 return JVMTI_ERROR_INVALID_CLASS;
1647 }
1648 if (java_lang_Class::is_primitive(k_mirror)) {
1649 return JVMTI_ERROR_NONE;
1650 }
1651 k_oop = java_lang_Class::as_Klass(k_mirror);
1652 if (k_oop == NULL) {
1653 return JVMTI_ERROR_INVALID_CLASS;
1654 }
1655 }
1656
1657 Thread *thread = Thread::current();
1658 HandleMark hm(thread);
1659 KlassHandle kh (thread, k_oop);
1660
1661 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1662 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1663 return JVMTI_ERROR_NONE;
1664 } /* end FollowReferences */
1665
1666
1667 // klass - NULL is a valid value, must be checked
1668 // callbacks - pre-checked for NULL
1669 // user_data - NULL is a valid value, must be checked
1670 jvmtiError
1671 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1672 // check klass if provided
1673 Klass* k_oop = NULL;
1674 if (klass != NULL) {
1675 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1676 if (k_mirror == NULL) {
1677 return JVMTI_ERROR_INVALID_CLASS;
1678 }
1679 if (java_lang_Class::is_primitive(k_mirror)) {
1680 return JVMTI_ERROR_NONE;
1681 }
1682 k_oop = java_lang_Class::as_Klass(k_mirror);
1683 if (k_oop == NULL) {
1684 return JVMTI_ERROR_INVALID_CLASS;
1685 }
1686 }
1687
1688 Thread *thread = Thread::current();
1689 HandleMark hm(thread);
1690 KlassHandle kh (thread, k_oop);
1691
1692 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1693 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1694 return JVMTI_ERROR_NONE;
1695 } /* end IterateThroughHeap */
1696
1697
1698 // tag_ptr - pre-checked for NULL
1699 jvmtiError
1700 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1701 oop o = JNIHandles::resolve_external_guard(object);
1702 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1703 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1704 return JVMTI_ERROR_NONE;
1705 } /* end GetTag */
1706
1707
1708 jvmtiError
1709 JvmtiEnv::SetTag(jobject object, jlong tag) {
1710 oop o = JNIHandles::resolve_external_guard(object);
1711 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1712 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1713 return JVMTI_ERROR_NONE;
1714 } /* end SetTag */
1715
1716
1717 // tag_count - pre-checked to be greater than or equal to 0
1718 // tags - pre-checked for NULL
1719 // count_ptr - pre-checked for NULL
1720 // object_result_ptr - NULL is a valid value, must be checked
1721 // tag_result_ptr - NULL is a valid value, must be checked
1722 jvmtiError
1723 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1724 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1725 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1726 } /* end GetObjectsWithTags */
1727
1728
1729 jvmtiError
1730 JvmtiEnv::ForceGarbageCollection() {
1731 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1732 return JVMTI_ERROR_NONE;
1733 } /* end ForceGarbageCollection */
1734
1735
1736 //
1737 // Heap (1.0) functions
1738 //
1739
1740 // object_reference_callback - pre-checked for NULL
1741 // user_data - NULL is a valid value, must be checked
1742 jvmtiError
1743 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1744 oop o = JNIHandles::resolve_external_guard(object);
1745 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1746 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1747 return JVMTI_ERROR_NONE;
1748 } /* end IterateOverObjectsReachableFromObject */
1749
1750
1751 // heap_root_callback - NULL is a valid value, must be checked
1752 // stack_ref_callback - NULL is a valid value, must be checked
1753 // object_ref_callback - NULL is a valid value, must be checked
1754 // user_data - NULL is a valid value, must be checked
1755 jvmtiError
1756 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1757 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1758 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1759 return JVMTI_ERROR_NONE;
1760 } /* end IterateOverReachableObjects */
1761
1762
1763 // heap_object_callback - pre-checked for NULL
1764 // user_data - NULL is a valid value, must be checked
1765 jvmtiError
1766 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1767 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1768 Thread *thread = Thread::current();
1769 HandleMark hm(thread);
1770 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1771 return JVMTI_ERROR_NONE;
1772 } /* end IterateOverHeap */
1773
1774
1775 // k_mirror - may be primitive, this must be checked
1776 // heap_object_callback - pre-checked for NULL
1777 // user_data - NULL is a valid value, must be checked
1778 jvmtiError
1779 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1780 if (java_lang_Class::is_primitive(k_mirror)) {
1781 // DO PRIMITIVE CLASS PROCESSING
1782 return JVMTI_ERROR_NONE;
1783 }
1784 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1785 if (k_oop == NULL) {
1786 return JVMTI_ERROR_INVALID_CLASS;
1787 }
1788 Thread *thread = Thread::current();
1789 HandleMark hm(thread);
1790 KlassHandle klass (thread, k_oop);
1791 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1792 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1793 return JVMTI_ERROR_NONE;
1794 } /* end IterateOverInstancesOfClass */
1795
1796
1797 //
1798 // Local Variable functions
1799 //
1800
1801 // Threads_lock NOT held, java_thread not protected by lock
1802 // java_thread - pre-checked
1803 // java_thread - unchecked
1804 // depth - pre-checked as non-negative
1805 // value_ptr - pre-checked for NULL
1806 jvmtiError
1807 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1808 JavaThread* current_thread = JavaThread::current();
1809 // rm object is created to clean up the javaVFrame created in
1810 // doit_prologue(), but after doit() is finished with it.
1811 ResourceMark rm(current_thread);
1812
1813 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1814 VMThread::execute(&op);
1815 jvmtiError err = op.result();
1816 if (err != JVMTI_ERROR_NONE) {
1817 return err;
1818 } else {
1819 *value_ptr = op.value().l;
1820 return JVMTI_ERROR_NONE;
1821 }
1822 } /* end GetLocalObject */
1823
1824 // Threads_lock NOT held, java_thread not protected by lock
1825 // java_thread - pre-checked
1826 // java_thread - unchecked
1827 // depth - pre-checked as non-negative
1828 // value - pre-checked for NULL
1829 jvmtiError
1830 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1831 JavaThread* current_thread = JavaThread::current();
1832 // rm object is created to clean up the javaVFrame created in
1833 // doit_prologue(), but after doit() is finished with it.
1834 ResourceMark rm(current_thread);
1835
1836 VM_GetReceiver op(java_thread, current_thread, depth);
1837 VMThread::execute(&op);
1838 jvmtiError err = op.result();
1839 if (err != JVMTI_ERROR_NONE) {
1840 return err;
1841 } else {
1842 *value_ptr = op.value().l;
1843 return JVMTI_ERROR_NONE;
1844 }
1845 } /* end GetLocalInstance */
1846
1847
1848 // Threads_lock NOT held, java_thread not protected by lock
1849 // java_thread - pre-checked
1850 // java_thread - unchecked
1851 // depth - pre-checked as non-negative
1852 // value_ptr - pre-checked for NULL
1853 jvmtiError
1854 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1855 // rm object is created to clean up the javaVFrame created in
1856 // doit_prologue(), but after doit() is finished with it.
1857 ResourceMark rm;
1858
1859 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1860 VMThread::execute(&op);
1861 *value_ptr = op.value().i;
1862 return op.result();
1863 } /* end GetLocalInt */
1864
1865
1866 // Threads_lock NOT held, java_thread not protected by lock
1867 // java_thread - pre-checked
1868 // java_thread - unchecked
1869 // depth - pre-checked as non-negative
1870 // value_ptr - pre-checked for NULL
1871 jvmtiError
1872 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1873 // rm object is created to clean up the javaVFrame created in
1874 // doit_prologue(), but after doit() is finished with it.
1875 ResourceMark rm;
1876
1877 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1878 VMThread::execute(&op);
1879 *value_ptr = op.value().j;
1880 return op.result();
1881 } /* end GetLocalLong */
1882
1883
1884 // Threads_lock NOT held, java_thread not protected by lock
1885 // java_thread - pre-checked
1886 // java_thread - unchecked
1887 // depth - pre-checked as non-negative
1888 // value_ptr - pre-checked for NULL
1889 jvmtiError
1890 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1891 // rm object is created to clean up the javaVFrame created in
1892 // doit_prologue(), but after doit() is finished with it.
1893 ResourceMark rm;
1894
1895 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1896 VMThread::execute(&op);
1897 *value_ptr = op.value().f;
1898 return op.result();
1899 } /* end GetLocalFloat */
1900
1901
1902 // Threads_lock NOT held, java_thread not protected by lock
1903 // java_thread - pre-checked
1904 // java_thread - unchecked
1905 // depth - pre-checked as non-negative
1906 // value_ptr - pre-checked for NULL
1907 jvmtiError
1908 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1909 // rm object is created to clean up the javaVFrame created in
1910 // doit_prologue(), but after doit() is finished with it.
1911 ResourceMark rm;
1912
1913 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1914 VMThread::execute(&op);
1915 *value_ptr = op.value().d;
1916 return op.result();
1917 } /* end GetLocalDouble */
1918
1919
1920 // Threads_lock NOT held, java_thread not protected by lock
1921 // java_thread - pre-checked
1922 // java_thread - unchecked
1923 // depth - pre-checked as non-negative
1924 jvmtiError
1925 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1926 // rm object is created to clean up the javaVFrame created in
1927 // doit_prologue(), but after doit() is finished with it.
1928 ResourceMark rm;
1929 jvalue val;
1930 val.l = value;
1931 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1932 VMThread::execute(&op);
1933 return op.result();
1934 } /* end SetLocalObject */
1935
1936
1937 // Threads_lock NOT held, java_thread not protected by lock
1938 // java_thread - pre-checked
1939 // java_thread - unchecked
1940 // depth - pre-checked as non-negative
1941 jvmtiError
1942 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1943 // rm object is created to clean up the javaVFrame created in
1944 // doit_prologue(), but after doit() is finished with it.
1945 ResourceMark rm;
1946 jvalue val;
1947 val.i = value;
1948 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1949 VMThread::execute(&op);
1950 return op.result();
1951 } /* end SetLocalInt */
1952
1953
1954 // Threads_lock NOT held, java_thread not protected by lock
1955 // java_thread - pre-checked
1956 // java_thread - unchecked
1957 // depth - pre-checked as non-negative
1958 jvmtiError
1959 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1960 // rm object is created to clean up the javaVFrame created in
1961 // doit_prologue(), but after doit() is finished with it.
1962 ResourceMark rm;
1963 jvalue val;
1964 val.j = value;
1965 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1966 VMThread::execute(&op);
1967 return op.result();
1968 } /* end SetLocalLong */
1969
1970
1971 // Threads_lock NOT held, java_thread not protected by lock
1972 // java_thread - pre-checked
1973 // java_thread - unchecked
1974 // depth - pre-checked as non-negative
1975 jvmtiError
1976 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1977 // rm object is created to clean up the javaVFrame created in
1978 // doit_prologue(), but after doit() is finished with it.
1979 ResourceMark rm;
1980 jvalue val;
1981 val.f = value;
1982 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1983 VMThread::execute(&op);
1984 return op.result();
1985 } /* end SetLocalFloat */
1986
1987
1988 // Threads_lock NOT held, java_thread not protected by lock
1989 // java_thread - pre-checked
1990 // java_thread - unchecked
1991 // depth - pre-checked as non-negative
1992 jvmtiError
1993 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1994 // rm object is created to clean up the javaVFrame created in
1995 // doit_prologue(), but after doit() is finished with it.
1996 ResourceMark rm;
1997 jvalue val;
1998 val.d = value;
1999 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2000 VMThread::execute(&op);
2001 return op.result();
2002 } /* end SetLocalDouble */
2003
2004
2005 //
2006 // Breakpoint functions
2007 //
2008
2009 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2010 jvmtiError
2011 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2012 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2013 if (location < 0) { // simple invalid location check first
2014 return JVMTI_ERROR_INVALID_LOCATION;
2015 }
2016 // verify that the breakpoint is not past the end of the method
2017 if (location >= (jlocation) method_oop->code_size()) {
2018 return JVMTI_ERROR_INVALID_LOCATION;
2019 }
2020
2021 ResourceMark rm;
2022 JvmtiBreakpoint bp(method_oop, location);
2023 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2024 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2025 return JVMTI_ERROR_DUPLICATE;
2026
2027 if (TraceJVMTICalls) {
2028 jvmti_breakpoints.print();
2029 }
2030
2031 return JVMTI_ERROR_NONE;
2032 } /* end SetBreakpoint */
2033
2034
2035 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2036 jvmtiError
2037 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2038 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2039
2040 if (location < 0) { // simple invalid location check first
2041 return JVMTI_ERROR_INVALID_LOCATION;
2042 }
2043
2044 // verify that the breakpoint is not past the end of the method
2045 if (location >= (jlocation) method_oop->code_size()) {
2046 return JVMTI_ERROR_INVALID_LOCATION;
2047 }
2048
2049 JvmtiBreakpoint bp(method_oop, location);
2050
2051 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2052 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2053 return JVMTI_ERROR_NOT_FOUND;
2054
2055 if (TraceJVMTICalls) {
2056 jvmti_breakpoints.print();
2057 }
2058
2059 return JVMTI_ERROR_NONE;
2060 } /* end ClearBreakpoint */
2061
2062
2063 //
2064 // Watched Field functions
2065 //
2066
2067 jvmtiError
2068 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2069 // make sure we haven't set this watch before
2070 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2071 fdesc_ptr->set_is_field_access_watched(true);
2072
2073 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2074
2075 return JVMTI_ERROR_NONE;
2076 } /* end SetFieldAccessWatch */
2077
2078
2079 jvmtiError
2080 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2081 // make sure we have a watch to clear
2082 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2083 fdesc_ptr->set_is_field_access_watched(false);
2084
2085 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2086
2087 return JVMTI_ERROR_NONE;
2088 } /* end ClearFieldAccessWatch */
2089
2090
2091 jvmtiError
2092 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2093 // make sure we haven't set this watch before
2094 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2095 fdesc_ptr->set_is_field_modification_watched(true);
2096
2097 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2098
2099 return JVMTI_ERROR_NONE;
2100 } /* end SetFieldModificationWatch */
2101
2102
2103 jvmtiError
2104 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2105 // make sure we have a watch to clear
2106 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2107 fdesc_ptr->set_is_field_modification_watched(false);
2108
2109 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2110
2111 return JVMTI_ERROR_NONE;
2112 } /* end ClearFieldModificationWatch */
2113
2114 //
2115 // Class functions
2116 //
2117
2118
2119 // k_mirror - may be primitive, this must be checked
2120 // signature_ptr - NULL is a valid value, must be checked
2121 // generic_ptr - NULL is a valid value, must be checked
2122 jvmtiError
2123 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2124 ResourceMark rm;
2125 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2126 Klass* k = NULL;
2127 if (!isPrimitive) {
2128 k = java_lang_Class::as_Klass(k_mirror);
2129 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2130 }
2131 if (signature_ptr != NULL) {
2132 char* result = NULL;
2133 if (isPrimitive) {
2134 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2135 result = (char*) jvmtiMalloc(2);
2136 result[0] = tchar;
2137 result[1] = '\0';
2138 } else {
2139 const char* class_sig = k->signature_name();
2140 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2141 strcpy(result, class_sig);
2142 }
2143 *signature_ptr = result;
2144 }
2145 if (generic_ptr != NULL) {
2146 *generic_ptr = NULL;
2147 if (!isPrimitive && k->is_instance_klass()) {
2148 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2149 if (soo != NULL) {
2150 const char *gen_sig = soo->as_C_string();
2151 if (gen_sig != NULL) {
2152 char* gen_result;
2153 jvmtiError err = allocate(strlen(gen_sig) + 1,
2154 (unsigned char **)&gen_result);
2155 if (err != JVMTI_ERROR_NONE) {
2156 return err;
2157 }
2158 strcpy(gen_result, gen_sig);
2159 *generic_ptr = gen_result;
2160 }
2161 }
2162 }
2163 }
2164 return JVMTI_ERROR_NONE;
2165 } /* end GetClassSignature */
2166
2167
2168 // k_mirror - may be primitive, this must be checked
2169 // status_ptr - pre-checked for NULL
2170 jvmtiError
2171 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2172 jint result = 0;
2173 if (java_lang_Class::is_primitive(k_mirror)) {
2174 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2175 } else {
2176 Klass* k = java_lang_Class::as_Klass(k_mirror);
2177 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2178 result = k->jvmti_class_status();
2179 }
2180 *status_ptr = result;
2181
2182 return JVMTI_ERROR_NONE;
2183 } /* end GetClassStatus */
2184
2185
2186 // k_mirror - may be primitive, this must be checked
2187 // source_name_ptr - pre-checked for NULL
2188 jvmtiError
2189 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2190 if (java_lang_Class::is_primitive(k_mirror)) {
2191 return JVMTI_ERROR_ABSENT_INFORMATION;
2192 }
2193 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2194 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2195
2196 if (!k_klass->is_instance_klass()) {
2197 return JVMTI_ERROR_ABSENT_INFORMATION;
2198 }
2199
2200 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2201 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2202 {
2203 JavaThread* current_thread = JavaThread::current();
2204 ResourceMark rm(current_thread);
2205 const char* sfncp = (const char*) sfnOop->as_C_string();
2206 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2207 strcpy(*source_name_ptr, sfncp);
2208 }
2209
2210 return JVMTI_ERROR_NONE;
2211 } /* end GetSourceFileName */
2212
2213
2214 // k_mirror - may be primitive, this must be checked
2215 // modifiers_ptr - pre-checked for NULL
2216 jvmtiError
2217 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2218 JavaThread* current_thread = JavaThread::current();
2219 jint result = 0;
2220 if (!java_lang_Class::is_primitive(k_mirror)) {
2221 Klass* k = java_lang_Class::as_Klass(k_mirror);
2222 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2223 result = k->compute_modifier_flags(current_thread);
2224 JavaThread* THREAD = current_thread; // pass to macros
2225 if (HAS_PENDING_EXCEPTION) {
2226 CLEAR_PENDING_EXCEPTION;
2227 return JVMTI_ERROR_INTERNAL;
2228 };
2229
2230 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2231 if(k->is_super()) {
2232 result |= JVM_ACC_SUPER;
2233 }
2234 } else {
2235 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2236 }
2237 *modifiers_ptr = result;
2238
2239 return JVMTI_ERROR_NONE;
2240 } /* end GetClassModifiers */
2241
2242
2243 // k_mirror - may be primitive, this must be checked
2244 // method_count_ptr - pre-checked for NULL
2245 // methods_ptr - pre-checked for NULL
2246 jvmtiError
2247 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2248 JavaThread* current_thread = JavaThread::current();
2249 HandleMark hm(current_thread);
2250
2251 if (java_lang_Class::is_primitive(k_mirror)) {
2252 *method_count_ptr = 0;
2253 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2254 return JVMTI_ERROR_NONE;
2255 }
2256 Klass* k = java_lang_Class::as_Klass(k_mirror);
2257 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2258
2259 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2260 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2261 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2262 }
2263
2264 if (!k->is_instance_klass()) {
2265 *method_count_ptr = 0;
2266 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2267 return JVMTI_ERROR_NONE;
2268 }
2269 instanceKlassHandle instanceK_h(current_thread, k);
2270 // Allocate the result and fill it in
2271 int result_length = instanceK_h->methods()->length();
2272 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2273 int index;
2274 bool jmethodids_found = true;
2275
2276 if (JvmtiExport::can_maintain_original_method_order()) {
2277 // Use the original method ordering indices stored in the class, so we can emit
2278 // jmethodIDs in the order they appeared in the class file
2279 for (index = 0; index < result_length; index++) {
2280 Method* m = instanceK_h->methods()->at(index);
2281 int original_index = instanceK_h->method_ordering()->at(index);
2282 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2283 jmethodID id;
2284 if (jmethodids_found) {
2285 id = m->find_jmethod_id_or_null();
2286 if (id == NULL) {
2287 // If we find an uninitialized value, make sure there is
2288 // enough space for all the uninitialized values we might
2289 // find.
2290 instanceK_h->ensure_space_for_methodids(index);
2291 jmethodids_found = false;
2292 id = m->jmethod_id();
2293 }
2294 } else {
2295 id = m->jmethod_id();
2296 }
2297 result_list[original_index] = id;
2298 }
2299 } else {
2300 // otherwise just copy in any order
2301 for (index = 0; index < result_length; index++) {
2302 Method* m = instanceK_h->methods()->at(index);
2303 jmethodID id;
2304 if (jmethodids_found) {
2305 id = m->find_jmethod_id_or_null();
2306 if (id == NULL) {
2307 // If we find an uninitialized value, make sure there is
2308 // enough space for all the uninitialized values we might
2309 // find.
2310 instanceK_h->ensure_space_for_methodids(index);
2311 jmethodids_found = false;
2312 id = m->jmethod_id();
2313 }
2314 } else {
2315 id = m->jmethod_id();
2316 }
2317 result_list[index] = id;
2318 }
2319 }
2320 // Fill in return value.
2321 *method_count_ptr = result_length;
2322 *methods_ptr = result_list;
2323
2324 return JVMTI_ERROR_NONE;
2325 } /* end GetClassMethods */
2326
2327
2328 // k_mirror - may be primitive, this must be checked
2329 // field_count_ptr - pre-checked for NULL
2330 // fields_ptr - pre-checked for NULL
2331 jvmtiError
2332 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2333 if (java_lang_Class::is_primitive(k_mirror)) {
2334 *field_count_ptr = 0;
2335 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2336 return JVMTI_ERROR_NONE;
2337 }
2338 JavaThread* current_thread = JavaThread::current();
2339 HandleMark hm(current_thread);
2340 Klass* k = java_lang_Class::as_Klass(k_mirror);
2341 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2342
2343 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2344 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2345 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2346 }
2347
2348 if (!k->is_instance_klass()) {
2349 *field_count_ptr = 0;
2350 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2351 return JVMTI_ERROR_NONE;
2352 }
2353
2354
2355 instanceKlassHandle instanceK_h(current_thread, k);
2356
2357 int result_count = 0;
2358 // First, count the fields.
2359 FilteredFieldStream flds(instanceK_h, true, true);
2360 result_count = flds.field_count();
2361
2362 // Allocate the result and fill it in
2363 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2364 // The JVMTI spec requires fields in the order they occur in the class file,
2365 // this is the reverse order of what FieldStream hands out.
2366 int id_index = (result_count - 1);
2367
2368 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2369 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2370 instanceK_h, src_st.offset(),
2371 src_st.access_flags().is_static());
2372 }
2373 assert(id_index == -1, "just checking");
2374 // Fill in the results
2375 *field_count_ptr = result_count;
2376 *fields_ptr = result_list;
2377
2378 return JVMTI_ERROR_NONE;
2379 } /* end GetClassFields */
2380
2381
2382 // k_mirror - may be primitive, this must be checked
2383 // interface_count_ptr - pre-checked for NULL
2384 // interfaces_ptr - pre-checked for NULL
2385 jvmtiError
2386 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2387 {
2388 if (java_lang_Class::is_primitive(k_mirror)) {
2389 *interface_count_ptr = 0;
2390 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2391 return JVMTI_ERROR_NONE;
2392 }
2393 JavaThread* current_thread = JavaThread::current();
2394 HandleMark hm(current_thread);
2395 Klass* k = java_lang_Class::as_Klass(k_mirror);
2396 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2397
2398 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2399 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2400 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2401
2402 if (!k->is_instance_klass()) {
2403 *interface_count_ptr = 0;
2404 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2405 return JVMTI_ERROR_NONE;
2406 }
2407
2408 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2409 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2410 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2411 for (int i_index = 0; i_index < result_length; i_index += 1) {
2412 Klass* klass_at = interface_list->at(i_index);
2413 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2414 assert(klass_at->is_interface(), "interfaces must be interfaces");
2415 oop mirror_at = klass_at->java_mirror();
2416 Handle handle_at = Handle(current_thread, mirror_at);
2417 result_list[i_index] = (jclass) jni_reference(handle_at);
2418 }
2419 *interface_count_ptr = result_length;
2420 *interfaces_ptr = result_list;
2421 }
2422
2423 return JVMTI_ERROR_NONE;
2424 } /* end GetImplementedInterfaces */
2425
2426
2427 // k_mirror - may be primitive, this must be checked
2428 // minor_version_ptr - pre-checked for NULL
2429 // major_version_ptr - pre-checked for NULL
2430 jvmtiError
2431 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2432 if (java_lang_Class::is_primitive(k_mirror)) {
2433 return JVMTI_ERROR_ABSENT_INFORMATION;
2434 }
2435 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2436 Thread *thread = Thread::current();
2437 HandleMark hm(thread);
2438 KlassHandle klass(thread, k_oop);
2439
2440 jint status = klass->jvmti_class_status();
2441 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2442 return JVMTI_ERROR_INVALID_CLASS;
2443 }
2444 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2445 return JVMTI_ERROR_ABSENT_INFORMATION;
2446 }
2447
2448 instanceKlassHandle ik(thread, k_oop);
2449 *minor_version_ptr = ik->minor_version();
2450 *major_version_ptr = ik->major_version();
2451
2452 return JVMTI_ERROR_NONE;
2453 } /* end GetClassVersionNumbers */
2454
2455
2456 // k_mirror - may be primitive, this must be checked
2457 // constant_pool_count_ptr - pre-checked for NULL
2458 // constant_pool_byte_count_ptr - pre-checked for NULL
2459 // constant_pool_bytes_ptr - pre-checked for NULL
2460 jvmtiError
2461 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2462 if (java_lang_Class::is_primitive(k_mirror)) {
2463 return JVMTI_ERROR_ABSENT_INFORMATION;
2464 }
2465
2466 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2467 Thread *thread = Thread::current();
2468 HandleMark hm(thread);
2469 ResourceMark rm(thread);
2470 KlassHandle klass(thread, k_oop);
2471
2472 jint status = klass->jvmti_class_status();
2473 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2474 return JVMTI_ERROR_INVALID_CLASS;
2475 }
2476 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2477 return JVMTI_ERROR_ABSENT_INFORMATION;
2478 }
2479
2480 instanceKlassHandle ikh(thread, k_oop);
2481 JvmtiConstantPoolReconstituter reconstituter(ikh);
2482 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2483 return reconstituter.get_error();
2484 }
2485
2486 unsigned char *cpool_bytes;
2487 int cpool_size = reconstituter.cpool_size();
2488 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2489 return reconstituter.get_error();
2490 }
2491 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2492 if (res != JVMTI_ERROR_NONE) {
2493 return res;
2494 }
2495 reconstituter.copy_cpool_bytes(cpool_bytes);
2496 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2497 return reconstituter.get_error();
2498 }
2499
2500 constantPoolHandle constants(thread, ikh->constants());
2501 *constant_pool_count_ptr = constants->length();
2502 *constant_pool_byte_count_ptr = cpool_size;
2503 *constant_pool_bytes_ptr = cpool_bytes;
2504
2505 return JVMTI_ERROR_NONE;
2506 } /* end GetConstantPool */
2507
2508
2509 // k_mirror - may be primitive, this must be checked
2510 // is_interface_ptr - pre-checked for NULL
2511 jvmtiError
2512 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2513 {
2514 bool result = false;
2515 if (!java_lang_Class::is_primitive(k_mirror)) {
2516 Klass* k = java_lang_Class::as_Klass(k_mirror);
2517 if (k != NULL && k->is_interface()) {
2518 result = true;
2519 }
2520 }
2521 *is_interface_ptr = result;
2522 }
2523
2524 return JVMTI_ERROR_NONE;
2525 } /* end IsInterface */
2526
2527
2528 // k_mirror - may be primitive, this must be checked
2529 // is_array_class_ptr - pre-checked for NULL
2530 jvmtiError
2531 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2532 {
2533 bool result = false;
2534 if (!java_lang_Class::is_primitive(k_mirror)) {
2535 Klass* k = java_lang_Class::as_Klass(k_mirror);
2536 if (k != NULL && k->is_array_klass()) {
2537 result = true;
2538 }
2539 }
2540 *is_array_class_ptr = result;
2541 }
2542
2543 return JVMTI_ERROR_NONE;
2544 } /* end IsArrayClass */
2545
2546
2547 // k_mirror - may be primitive, this must be checked
2548 // classloader_ptr - pre-checked for NULL
2549 jvmtiError
2550 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2551 {
2552 if (java_lang_Class::is_primitive(k_mirror)) {
2553 *classloader_ptr = (jclass) jni_reference(Handle());
2554 return JVMTI_ERROR_NONE;
2555 }
2556 JavaThread* current_thread = JavaThread::current();
2557 HandleMark hm(current_thread);
2558 Klass* k = java_lang_Class::as_Klass(k_mirror);
2559 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2560
2561 oop result_oop = k->class_loader();
2562 if (result_oop == NULL) {
2563 *classloader_ptr = (jclass) jni_reference(Handle());
2564 return JVMTI_ERROR_NONE;
2565 }
2566 Handle result_handle = Handle(current_thread, result_oop);
2567 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2568 *classloader_ptr = result_jnihandle;
2569 }
2570 return JVMTI_ERROR_NONE;
2571 } /* end GetClassLoader */
2572
2573
2574 // k_mirror - may be primitive, this must be checked
2575 // source_debug_extension_ptr - pre-checked for NULL
2576 jvmtiError
2577 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2578 {
2579 if (java_lang_Class::is_primitive(k_mirror)) {
2580 return JVMTI_ERROR_ABSENT_INFORMATION;
2581 }
2582 Klass* k = java_lang_Class::as_Klass(k_mirror);
2583 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2584 if (!k->is_instance_klass()) {
2585 return JVMTI_ERROR_ABSENT_INFORMATION;
2586 }
2587 char* sde = InstanceKlass::cast(k)->source_debug_extension();
2588 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2589
2590 {
2591 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2592 strcpy(*source_debug_extension_ptr, sde);
2593 }
2594 }
2595
2596 return JVMTI_ERROR_NONE;
2597 } /* end GetSourceDebugExtension */
2598
2599 //
2600 // Object functions
2601 //
2602
2603 // hash_code_ptr - pre-checked for NULL
2604 jvmtiError
2605 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2606 oop mirror = JNIHandles::resolve_external_guard(object);
2607 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2608 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2609
2610 {
2611 jint result = (jint) mirror->identity_hash();
2612 *hash_code_ptr = result;
2613 }
2614 return JVMTI_ERROR_NONE;
2615 } /* end GetObjectHashCode */
2616
2617
2618 // info_ptr - pre-checked for NULL
2619 jvmtiError
2620 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2621 JavaThread* calling_thread = JavaThread::current();
2622 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2623 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2624 // Some of the critical threads were not suspended. go to a safepoint and try again
2625 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2626 VMThread::execute(&op);
2627 err = op.result();
2628 }
2629 return err;
2630 } /* end GetObjectMonitorUsage */
2631
2632
2633 //
2634 // Field functions
2635 //
2636
2637 // name_ptr - NULL is a valid value, must be checked
2638 // signature_ptr - NULL is a valid value, must be checked
2639 // generic_ptr - NULL is a valid value, must be checked
2640 jvmtiError
2641 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2642 JavaThread* current_thread = JavaThread::current();
2643 ResourceMark rm(current_thread);
2644 if (name_ptr == NULL) {
2645 // just don't return the name
2646 } else {
2647 const char* fieldName = fdesc_ptr->name()->as_C_string();
2648 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2649 if (*name_ptr == NULL)
2650 return JVMTI_ERROR_OUT_OF_MEMORY;
2651 strcpy(*name_ptr, fieldName);
2652 }
2653 if (signature_ptr== NULL) {
2654 // just don't return the signature
2655 } else {
2656 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2657 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2658 if (*signature_ptr == NULL)
2659 return JVMTI_ERROR_OUT_OF_MEMORY;
2660 strcpy(*signature_ptr, fieldSignature);
2661 }
2662 if (generic_ptr != NULL) {
2663 *generic_ptr = NULL;
2664 Symbol* soop = fdesc_ptr->generic_signature();
2665 if (soop != NULL) {
2666 const char* gen_sig = soop->as_C_string();
2667 if (gen_sig != NULL) {
2668 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2669 if (err != JVMTI_ERROR_NONE) {
2670 return err;
2671 }
2672 strcpy(*generic_ptr, gen_sig);
2673 }
2674 }
2675 }
2676 return JVMTI_ERROR_NONE;
2677 } /* end GetFieldName */
2678
2679
2680 // declaring_class_ptr - pre-checked for NULL
2681 jvmtiError
2682 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2683
2684 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2685 return JVMTI_ERROR_NONE;
2686 } /* end GetFieldDeclaringClass */
2687
2688
2689 // modifiers_ptr - pre-checked for NULL
2690 jvmtiError
2691 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2692
2693 AccessFlags resultFlags = fdesc_ptr->access_flags();
2694 jint result = resultFlags.as_int();
2695 *modifiers_ptr = result;
2696
2697 return JVMTI_ERROR_NONE;
2698 } /* end GetFieldModifiers */
2699
2700
2701 // is_synthetic_ptr - pre-checked for NULL
2702 jvmtiError
2703 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2704 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2705 return JVMTI_ERROR_NONE;
2706 } /* end IsFieldSynthetic */
2707
2708
2709 //
2710 // Method functions
2711 //
2712
2713 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2714 // name_ptr - NULL is a valid value, must be checked
2715 // signature_ptr - NULL is a valid value, must be checked
2716 // generic_ptr - NULL is a valid value, must be checked
2717 jvmtiError
2718 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2719 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2720 JavaThread* current_thread = JavaThread::current();
2721
2722 ResourceMark rm(current_thread); // get the utf8 name and signature
2723 if (name_ptr == NULL) {
2724 // just don't return the name
2725 } else {
2726 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2727 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2728 strcpy(*name_ptr, utf8_name);
2729 }
2730 if (signature_ptr == NULL) {
2731 // just don't return the signature
2732 } else {
2733 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2734 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2735 strcpy(*signature_ptr, utf8_signature);
2736 }
2737
2738 if (generic_ptr != NULL) {
2739 *generic_ptr = NULL;
2740 Symbol* soop = method_oop->generic_signature();
2741 if (soop != NULL) {
2742 const char* gen_sig = soop->as_C_string();
2743 if (gen_sig != NULL) {
2744 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2745 if (err != JVMTI_ERROR_NONE) {
2746 return err;
2747 }
2748 strcpy(*generic_ptr, gen_sig);
2749 }
2750 }
2751 }
2752 return JVMTI_ERROR_NONE;
2753 } /* end GetMethodName */
2754
2755
2756 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2757 // declaring_class_ptr - pre-checked for NULL
2758 jvmtiError
2759 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2760 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2761 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2762 return JVMTI_ERROR_NONE;
2763 } /* end GetMethodDeclaringClass */
2764
2765
2766 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2767 // modifiers_ptr - pre-checked for NULL
2768 jvmtiError
2769 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2770 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2771 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2772 return JVMTI_ERROR_NONE;
2773 } /* end GetMethodModifiers */
2774
2775
2776 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2777 // max_ptr - pre-checked for NULL
2778 jvmtiError
2779 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2780 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2781 // get max stack
2782 (*max_ptr) = method_oop->max_locals();
2783 return JVMTI_ERROR_NONE;
2784 } /* end GetMaxLocals */
2785
2786
2787 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2788 // size_ptr - pre-checked for NULL
2789 jvmtiError
2790 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2791 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2792 // get size of arguments
2793
2794 (*size_ptr) = method_oop->size_of_parameters();
2795 return JVMTI_ERROR_NONE;
2796 } /* end GetArgumentsSize */
2797
2798
2799 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2800 // entry_count_ptr - pre-checked for NULL
2801 // table_ptr - pre-checked for NULL
2802 jvmtiError
2803 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2804 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2805 if (!method_oop->has_linenumber_table()) {
2806 return (JVMTI_ERROR_ABSENT_INFORMATION);
2807 }
2808
2809 // The line number table is compressed so we don't know how big it is until decompressed.
2810 // Decompression is really fast so we just do it twice.
2811
2812 // Compute size of table
2813 jint num_entries = 0;
2814 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2815 while (stream.read_pair()) {
2816 num_entries++;
2817 }
2818 jvmtiLineNumberEntry *jvmti_table =
2819 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2820
2821 // Fill jvmti table
2822 if (num_entries > 0) {
2823 int index = 0;
2824 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2825 while (stream.read_pair()) {
2826 jvmti_table[index].start_location = (jlocation) stream.bci();
2827 jvmti_table[index].line_number = (jint) stream.line();
2828 index++;
2829 }
2830 assert(index == num_entries, "sanity check");
2831 }
2832
2833 // Set up results
2834 (*entry_count_ptr) = num_entries;
2835 (*table_ptr) = jvmti_table;
2836
2837 return JVMTI_ERROR_NONE;
2838 } /* end GetLineNumberTable */
2839
2840
2841 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2842 // start_location_ptr - pre-checked for NULL
2843 // end_location_ptr - pre-checked for NULL
2844 jvmtiError
2845 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2846
2847 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2848 // get start and end location
2849 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2850 if (method_oop->code_size() == 0) {
2851 // there is no code so there is no start location
2852 (*start_location_ptr) = (jlocation)(-1);
2853 } else {
2854 (*start_location_ptr) = (jlocation)(0);
2855 }
2856
2857 return JVMTI_ERROR_NONE;
2858 } /* end GetMethodLocation */
2859
2860
2861 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2862 // entry_count_ptr - pre-checked for NULL
2863 // table_ptr - pre-checked for NULL
2864 jvmtiError
2865 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2866
2867 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2868 JavaThread* current_thread = JavaThread::current();
2869
2870 // does the klass have any local variable information?
2871 InstanceKlass* ik = method_oop->method_holder();
2872 if (!ik->access_flags().has_localvariable_table()) {
2873 return (JVMTI_ERROR_ABSENT_INFORMATION);
2874 }
2875
2876 ConstantPool* constants = method_oop->constants();
2877 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2878
2879 // in the vm localvariable table representation, 6 consecutive elements in the table
2880 // represent a 6-tuple of shorts
2881 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2882 jint num_entries = method_oop->localvariable_table_length();
2883 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2884 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2885
2886 if (num_entries > 0) {
2887 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2888 for (int i = 0; i < num_entries; i++) {
2889 // get the 5 tuple information from the vm table
2890 jlocation start_location = (jlocation) table[i].start_bci;
2891 jint length = (jint) table[i].length;
2892 int name_index = (int) table[i].name_cp_index;
2893 int signature_index = (int) table[i].descriptor_cp_index;
2894 int generic_signature_index = (int) table[i].signature_cp_index;
2895 jint slot = (jint) table[i].slot;
2896
2897 // get utf8 name and signature
2898 char *name_buf = NULL;
2899 char *sig_buf = NULL;
2900 char *gen_sig_buf = NULL;
2901 {
2902 ResourceMark rm(current_thread);
2903
2904 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2905 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2906 strcpy(name_buf, utf8_name);
2907
2908 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2909 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2910 strcpy(sig_buf, utf8_signature);
2911
2912 if (generic_signature_index > 0) {
2913 const char *utf8_gen_sign = (const char *)
2914 constants->symbol_at(generic_signature_index)->as_utf8();
2915 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2916 strcpy(gen_sig_buf, utf8_gen_sign);
2917 }
2918 }
2919
2920 // fill in the jvmti local variable table
2921 jvmti_table[i].start_location = start_location;
2922 jvmti_table[i].length = length;
2923 jvmti_table[i].name = name_buf;
2924 jvmti_table[i].signature = sig_buf;
2925 jvmti_table[i].generic_signature = gen_sig_buf;
2926 jvmti_table[i].slot = slot;
2927 }
2928 }
2929
2930 // set results
2931 (*entry_count_ptr) = num_entries;
2932 (*table_ptr) = jvmti_table;
2933
2934 return JVMTI_ERROR_NONE;
2935 } /* end GetLocalVariableTable */
2936
2937
2938 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2939 // bytecode_count_ptr - pre-checked for NULL
2940 // bytecodes_ptr - pre-checked for NULL
2941 jvmtiError
2942 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2943 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2944
2945 HandleMark hm;
2946 methodHandle method(method_oop);
2947 jint size = (jint)method->code_size();
2948 jvmtiError err = allocate(size, bytecodes_ptr);
2949 if (err != JVMTI_ERROR_NONE) {
2950 return err;
2951 }
2952
2953 (*bytecode_count_ptr) = size;
2954 // get byte codes
2955 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2956
2957 return JVMTI_ERROR_NONE;
2958 } /* end GetBytecodes */
2959
2960
2961 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2962 // is_native_ptr - pre-checked for NULL
2963 jvmtiError
2964 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2965 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2966 (*is_native_ptr) = method_oop->is_native();
2967 return JVMTI_ERROR_NONE;
2968 } /* end IsMethodNative */
2969
2970
2971 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2972 // is_synthetic_ptr - pre-checked for NULL
2973 jvmtiError
2974 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
2975 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2976 (*is_synthetic_ptr) = method_oop->is_synthetic();
2977 return JVMTI_ERROR_NONE;
2978 } /* end IsMethodSynthetic */
2979
2980
2981 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2982 // is_obsolete_ptr - pre-checked for NULL
2983 jvmtiError
2984 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
2985 if (use_version_1_0_semantics() &&
2986 get_capabilities()->can_redefine_classes == 0) {
2987 // This JvmtiEnv requested version 1.0 semantics and this function
2988 // requires the can_redefine_classes capability in version 1.0 so
2989 // we need to return an error here.
2990 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2991 }
2992
2993 if (method_oop == NULL || method_oop->is_obsolete()) {
2994 *is_obsolete_ptr = true;
2995 } else {
2996 *is_obsolete_ptr = false;
2997 }
2998 return JVMTI_ERROR_NONE;
2999 } /* end IsMethodObsolete */
3000
3001 //
3002 // Raw Monitor functions
3003 //
3004
3005 // name - pre-checked for NULL
3006 // monitor_ptr - pre-checked for NULL
3007 jvmtiError
3008 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3009 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3010 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3011
3012 *monitor_ptr = (jrawMonitorID)rmonitor;
3013
3014 return JVMTI_ERROR_NONE;
3015 } /* end CreateRawMonitor */
3016
3017
3018 // rmonitor - pre-checked for validity
3019 jvmtiError
3020 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3021 if (Threads::number_of_threads() == 0) {
3022 // Remove this monitor from pending raw monitors list
3023 // if it has entered in onload or start phase.
3024 JvmtiPendingMonitors::destroy(rmonitor);
3025 } else {
3026 Thread* thread = Thread::current();
3027 if (rmonitor->is_entered(thread)) {
3028 // The caller owns this monitor which we are about to destroy.
3029 // We exit the underlying synchronization object so that the
3030 // "delete monitor" call below can work without an assertion
3031 // failure on systems that don't like destroying synchronization
3032 // objects that are locked.
3033 int r;
3034 intptr_t recursion = rmonitor->recursions();
3035 for (intptr_t i=0; i <= recursion; i++) {
3036 r = rmonitor->raw_exit(thread);
3037 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3038 if (r != ObjectMonitor::OM_OK) { // robustness
3039 return JVMTI_ERROR_INTERNAL;
3040 }
3041 }
3042 }
3043 if (rmonitor->owner() != NULL) {
3044 // The caller is trying to destroy a monitor that is locked by
3045 // someone else. While this is not forbidden by the JVMTI
3046 // spec, it will cause an assertion failure on systems that don't
3047 // like destroying synchronization objects that are locked.
3048 // We indicate a problem with the error return (and leak the
3049 // monitor's memory).
3050 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3051 }
3052 }
3053
3054 delete rmonitor;
3055
3056 return JVMTI_ERROR_NONE;
3057 } /* end DestroyRawMonitor */
3058
3059
3060 // rmonitor - pre-checked for validity
3061 jvmtiError
3062 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3063 if (Threads::number_of_threads() == 0) {
3064 // No JavaThreads exist so ObjectMonitor enter cannot be
3065 // used, add this raw monitor to the pending list.
3066 // The pending monitors will be actually entered when
3067 // the VM is setup.
3068 // See transition_pending_raw_monitors in create_vm()
3069 // in thread.cpp.
3070 JvmtiPendingMonitors::enter(rmonitor);
3071 } else {
3072 int r = 0;
3073 Thread* thread = Thread::current();
3074
3075 if (thread->is_Java_thread()) {
3076 JavaThread* current_thread = (JavaThread*)thread;
3077
3078 #ifdef PROPER_TRANSITIONS
3079 // Not really unknown but ThreadInVMfromNative does more than we want
3080 ThreadInVMfromUnknown __tiv;
3081 {
3082 ThreadBlockInVM __tbivm(current_thread);
3083 r = rmonitor->raw_enter(current_thread);
3084 }
3085 #else
3086 /* Transition to thread_blocked without entering vm state */
3087 /* This is really evil. Normally you can't undo _thread_blocked */
3088 /* transitions like this because it would cause us to miss a */
3089 /* safepoint but since the thread was already in _thread_in_native */
3090 /* the thread is not leaving a safepoint safe state and it will */
3091 /* block when it tries to return from native. We can't safepoint */
3092 /* block in here because we could deadlock the vmthread. Blech. */
3093
3094 JavaThreadState state = current_thread->thread_state();
3095 assert(state == _thread_in_native, "Must be _thread_in_native");
3096 // frame should already be walkable since we are in native
3097 assert(!current_thread->has_last_Java_frame() ||
3098 current_thread->frame_anchor()->walkable(), "Must be walkable");
3099 current_thread->set_thread_state(_thread_blocked);
3100
3101 r = rmonitor->raw_enter(current_thread);
3102 // restore state, still at a safepoint safe state
3103 current_thread->set_thread_state(state);
3104
3105 #endif /* PROPER_TRANSITIONS */
3106 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3107 } else {
3108 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3109 r = rmonitor->raw_enter(thread);
3110 } else {
3111 ShouldNotReachHere();
3112 }
3113 }
3114
3115 if (r != ObjectMonitor::OM_OK) { // robustness
3116 return JVMTI_ERROR_INTERNAL;
3117 }
3118 }
3119 return JVMTI_ERROR_NONE;
3120 } /* end RawMonitorEnter */
3121
3122
3123 // rmonitor - pre-checked for validity
3124 jvmtiError
3125 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3126 jvmtiError err = JVMTI_ERROR_NONE;
3127
3128 if (Threads::number_of_threads() == 0) {
3129 // No JavaThreads exist so just remove this monitor from the pending list.
3130 // Bool value from exit is false if rmonitor is not in the list.
3131 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3132 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3133 }
3134 } else {
3135 int r = 0;
3136 Thread* thread = Thread::current();
3137
3138 if (thread->is_Java_thread()) {
3139 JavaThread* current_thread = (JavaThread*)thread;
3140 #ifdef PROPER_TRANSITIONS
3141 // Not really unknown but ThreadInVMfromNative does more than we want
3142 ThreadInVMfromUnknown __tiv;
3143 #endif /* PROPER_TRANSITIONS */
3144 r = rmonitor->raw_exit(current_thread);
3145 } else {
3146 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3147 r = rmonitor->raw_exit(thread);
3148 } else {
3149 ShouldNotReachHere();
3150 }
3151 }
3152
3153 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3154 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3155 } else {
3156 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3157 if (r != ObjectMonitor::OM_OK) { // robustness
3158 err = JVMTI_ERROR_INTERNAL;
3159 }
3160 }
3161 }
3162 return err;
3163 } /* end RawMonitorExit */
3164
3165
3166 // rmonitor - pre-checked for validity
3167 jvmtiError
3168 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3169 int r = 0;
3170 Thread* thread = Thread::current();
3171
3172 if (thread->is_Java_thread()) {
3173 JavaThread* current_thread = (JavaThread*)thread;
3174 #ifdef PROPER_TRANSITIONS
3175 // Not really unknown but ThreadInVMfromNative does more than we want
3176 ThreadInVMfromUnknown __tiv;
3177 {
3178 ThreadBlockInVM __tbivm(current_thread);
3179 r = rmonitor->raw_wait(millis, true, current_thread);
3180 }
3181 #else
3182 /* Transition to thread_blocked without entering vm state */
3183 /* This is really evil. Normally you can't undo _thread_blocked */
3184 /* transitions like this because it would cause us to miss a */
3185 /* safepoint but since the thread was already in _thread_in_native */
3186 /* the thread is not leaving a safepoint safe state and it will */
3187 /* block when it tries to return from native. We can't safepoint */
3188 /* block in here because we could deadlock the vmthread. Blech. */
3189
3190 JavaThreadState state = current_thread->thread_state();
3191 assert(state == _thread_in_native, "Must be _thread_in_native");
3192 // frame should already be walkable since we are in native
3193 assert(!current_thread->has_last_Java_frame() ||
3194 current_thread->frame_anchor()->walkable(), "Must be walkable");
3195 current_thread->set_thread_state(_thread_blocked);
3196
3197 r = rmonitor->raw_wait(millis, true, current_thread);
3198 // restore state, still at a safepoint safe state
3199 current_thread->set_thread_state(state);
3200
3201 #endif /* PROPER_TRANSITIONS */
3202 } else {
3203 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3204 r = rmonitor->raw_wait(millis, true, thread);
3205 } else {
3206 ShouldNotReachHere();
3207 }
3208 }
3209
3210 switch (r) {
3211 case ObjectMonitor::OM_INTERRUPTED:
3212 return JVMTI_ERROR_INTERRUPT;
3213 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3214 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3215 }
3216 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3217 if (r != ObjectMonitor::OM_OK) { // robustness
3218 return JVMTI_ERROR_INTERNAL;
3219 }
3220
3221 return JVMTI_ERROR_NONE;
3222 } /* end RawMonitorWait */
3223
3224
3225 // rmonitor - pre-checked for validity
3226 jvmtiError
3227 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3228 int r = 0;
3229 Thread* thread = Thread::current();
3230
3231 if (thread->is_Java_thread()) {
3232 JavaThread* current_thread = (JavaThread*)thread;
3233 // Not really unknown but ThreadInVMfromNative does more than we want
3234 ThreadInVMfromUnknown __tiv;
3235 r = rmonitor->raw_notify(current_thread);
3236 } else {
3237 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3238 r = rmonitor->raw_notify(thread);
3239 } else {
3240 ShouldNotReachHere();
3241 }
3242 }
3243
3244 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3245 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3246 }
3247 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3248 if (r != ObjectMonitor::OM_OK) { // robustness
3249 return JVMTI_ERROR_INTERNAL;
3250 }
3251
3252 return JVMTI_ERROR_NONE;
3253 } /* end RawMonitorNotify */
3254
3255
3256 // rmonitor - pre-checked for validity
3257 jvmtiError
3258 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3259 int r = 0;
3260 Thread* thread = Thread::current();
3261
3262 if (thread->is_Java_thread()) {
3263 JavaThread* current_thread = (JavaThread*)thread;
3264 ThreadInVMfromUnknown __tiv;
3265 r = rmonitor->raw_notifyAll(current_thread);
3266 } else {
3267 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3268 r = rmonitor->raw_notifyAll(thread);
3269 } else {
3270 ShouldNotReachHere();
3271 }
3272 }
3273
3274 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3275 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3276 }
3277 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3278 if (r != ObjectMonitor::OM_OK) { // robustness
3279 return JVMTI_ERROR_INTERNAL;
3280 }
3281
3282 return JVMTI_ERROR_NONE;
3283 } /* end RawMonitorNotifyAll */
3284
3285
3286 //
3287 // JNI Function Interception functions
3288 //
3289
3290
3291 // function_table - pre-checked for NULL
3292 jvmtiError
3293 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3294 // Copy jni function table at safepoint.
3295 VM_JNIFunctionTableCopier copier(function_table);
3296 VMThread::execute(&copier);
3297
3298 return JVMTI_ERROR_NONE;
3299 } /* end SetJNIFunctionTable */
3300
3301
3302 // function_table - pre-checked for NULL
3303 jvmtiError
3304 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3305 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3306 if (*function_table == NULL)
3307 return JVMTI_ERROR_OUT_OF_MEMORY;
3308 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3309 return JVMTI_ERROR_NONE;
3310 } /* end GetJNIFunctionTable */
3311
3312
3313 //
3314 // Event Management functions
3315 //
3316
3317 jvmtiError
3318 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3319 // can only generate two event types
3320 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3321 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3322 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3323 }
3324
3325 // for compiled_method_load events we must check that the environment
3326 // has the can_generate_compiled_method_load_events capability.
3327 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3328 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3329 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3330 }
3331 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3332 } else {
3333 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3334 }
3335
3336 } /* end GenerateEvents */
3337
3338
3339 //
3340 // Extension Mechanism functions
3341 //
3342
3343 // extension_count_ptr - pre-checked for NULL
3344 // extensions - pre-checked for NULL
3345 jvmtiError
3346 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3347 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3348 } /* end GetExtensionFunctions */
3349
3350
3351 // extension_count_ptr - pre-checked for NULL
3352 // extensions - pre-checked for NULL
3353 jvmtiError
3354 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3355 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3356 } /* end GetExtensionEvents */
3357
3358
3359 // callback - NULL is a valid value, must be checked
3360 jvmtiError
3361 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3362 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3363 } /* end SetExtensionEventCallback */
3364
3365 //
3366 // Timers functions
3367 //
3368
3369 // info_ptr - pre-checked for NULL
3370 jvmtiError
3371 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3372 os::current_thread_cpu_time_info(info_ptr);
3373 return JVMTI_ERROR_NONE;
3374 } /* end GetCurrentThreadCpuTimerInfo */
3375
3376
3377 // nanos_ptr - pre-checked for NULL
3378 jvmtiError
3379 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3380 *nanos_ptr = os::current_thread_cpu_time();
3381 return JVMTI_ERROR_NONE;
3382 } /* end GetCurrentThreadCpuTime */
3383
3384
3385 // info_ptr - pre-checked for NULL
3386 jvmtiError
3387 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3388 os::thread_cpu_time_info(info_ptr);
3389 return JVMTI_ERROR_NONE;
3390 } /* end GetThreadCpuTimerInfo */
3391
3392
3393 // Threads_lock NOT held, java_thread not protected by lock
3394 // java_thread - pre-checked
3395 // nanos_ptr - pre-checked for NULL
3396 jvmtiError
3397 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3398 *nanos_ptr = os::thread_cpu_time(java_thread);
3399 return JVMTI_ERROR_NONE;
3400 } /* end GetThreadCpuTime */
3401
3402
3403 // info_ptr - pre-checked for NULL
3404 jvmtiError
3405 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3406 os::javaTimeNanos_info(info_ptr);
3407 return JVMTI_ERROR_NONE;
3408 } /* end GetTimerInfo */
3409
3410
3411 // nanos_ptr - pre-checked for NULL
3412 jvmtiError
3413 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3414 *nanos_ptr = os::javaTimeNanos();
3415 return JVMTI_ERROR_NONE;
3416 } /* end GetTime */
3417
3418
3419 // processor_count_ptr - pre-checked for NULL
3420 jvmtiError
3421 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3422 *processor_count_ptr = os::active_processor_count();
3423 return JVMTI_ERROR_NONE;
3424 } /* end GetAvailableProcessors */
3425
3426 //
3427 // System Properties functions
3428 //
3429
3430 // count_ptr - pre-checked for NULL
3431 // property_ptr - pre-checked for NULL
3432 jvmtiError
3433 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3434 jvmtiError err = JVMTI_ERROR_NONE;
3435
3436 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3437
3438 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3439 if (err != JVMTI_ERROR_NONE) {
3440 return err;
3441 }
3442 int i = 0 ;
3443 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3444 const char *key = p->key();
3445 char **tmp_value = *property_ptr+i;
3446 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3447 if (err == JVMTI_ERROR_NONE) {
3448 strcpy(*tmp_value, key);
3449 } else {
3450 // clean up previously allocated memory.
3451 for (int j=0; j<i; j++) {
3452 Deallocate((unsigned char*)*property_ptr+j);
3453 }
3454 Deallocate((unsigned char*)property_ptr);
3455 break;
3456 }
3457 }
3458 return err;
3459 } /* end GetSystemProperties */
3460
3461
3462 // property - pre-checked for NULL
3463 // value_ptr - pre-checked for NULL
3464 jvmtiError
3465 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3466 jvmtiError err = JVMTI_ERROR_NONE;
3467 const char *value;
3468
3469 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3470 if (value == NULL) {
3471 err = JVMTI_ERROR_NOT_AVAILABLE;
3472 } else {
3473 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3474 if (err == JVMTI_ERROR_NONE) {
3475 strcpy(*value_ptr, value);
3476 }
3477 }
3478 return err;
3479 } /* end GetSystemProperty */
3480
3481
3482 // property - pre-checked for NULL
3483 // value - NULL is a valid value, must be checked
3484 jvmtiError
3485 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3486 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3487
3488 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3489 if (strcmp(property, p->key()) == 0) {
3490 if (p->set_value(value_ptr)) {
3491 err = JVMTI_ERROR_NONE;
3492 }
3493 }
3494 }
3495 return err;
3496 } /* end SetSystemProperty */