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/logConfiguration.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 ClassLoaderExt::append_boot_classpath(zip_entry);
480 return JVMTI_ERROR_NONE;
481 } else {
482 return JVMTI_ERROR_WRONG_PHASE;
483 }
484
485 } /* end AddToBootstrapClassLoaderSearch */
486
487
488 // segment - pre-checked for NULL
489 jvmtiError
490 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
491 jvmtiPhase phase = get_phase();
492
493 if (phase == JVMTI_PHASE_ONLOAD) {
494 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
495 if (strcmp("java.class.path", p->key()) == 0) {
496 p->append_value(segment);
497 break;
498 }
499 }
500 return JVMTI_ERROR_NONE;
501 } else if (phase == JVMTI_PHASE_LIVE) {
502 // The phase is checked by the wrapper that called this function,
503 // but this thread could be racing with the thread that is
504 // terminating the VM so we check one more time.
505 HandleMark hm;
506
507 // create the zip entry (which will open the zip file and hence
508 // check that the segment is indeed a zip file).
509 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
510 if (zip_entry == NULL) {
511 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
512 }
513 delete zip_entry; // no longer needed
514
515 // lock the loader
516 Thread* THREAD = Thread::current();
517 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
518
519 ObjectLocker ol(loader, THREAD);
520
521 // need the path as java.lang.String
522 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
523 if (HAS_PENDING_EXCEPTION) {
524 CLEAR_PENDING_EXCEPTION;
525 return JVMTI_ERROR_INTERNAL;
526 }
527
528 instanceKlassHandle loader_ik(THREAD, loader->klass());
529
530 // Invoke the appendToClassPathForInstrumentation method - if the method
531 // is not found it means the loader doesn't support adding to the class path
532 // in the live phase.
533 {
534 JavaValue res(T_VOID);
535 JavaCalls::call_special(&res,
536 loader,
537 loader_ik,
538 vmSymbols::appendToClassPathForInstrumentation_name(),
539 vmSymbols::appendToClassPathForInstrumentation_signature(),
540 path,
541 THREAD);
542 if (HAS_PENDING_EXCEPTION) {
543 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
544 CLEAR_PENDING_EXCEPTION;
545
546 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
547 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
548 } else {
549 return JVMTI_ERROR_INTERNAL;
550 }
551 }
552 }
553
554 return JVMTI_ERROR_NONE;
555 } else {
556 return JVMTI_ERROR_WRONG_PHASE;
557 }
558 } /* end AddToSystemClassLoaderSearch */
559
560 //
561 // General functions
562 //
563
564 // phase_ptr - pre-checked for NULL
565 jvmtiError
566 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
567 *phase_ptr = get_phase();
568 return JVMTI_ERROR_NONE;
569 } /* end GetPhase */
570
571
572 jvmtiError
573 JvmtiEnv::DisposeEnvironment() {
574 dispose();
575 return JVMTI_ERROR_NONE;
576 } /* end DisposeEnvironment */
577
578
579 // data - NULL is a valid value, must be checked
580 jvmtiError
581 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
582 set_env_local_storage(data);
583 return JVMTI_ERROR_NONE;
584 } /* end SetEnvironmentLocalStorage */
585
586
587 // data_ptr - pre-checked for NULL
588 jvmtiError
589 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
590 *data_ptr = (void*)get_env_local_storage();
591 return JVMTI_ERROR_NONE;
592 } /* end GetEnvironmentLocalStorage */
593
594 // version_ptr - pre-checked for NULL
595 jvmtiError
596 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
597 *version_ptr = JVMTI_VERSION;
598 return JVMTI_ERROR_NONE;
599 } /* end GetVersionNumber */
600
601
602 // name_ptr - pre-checked for NULL
603 jvmtiError
604 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
605 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
606 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
607 }
608 const char *name = JvmtiUtil::error_name(error);
609 if (name == NULL) {
610 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
611 }
612 size_t len = strlen(name) + 1;
613 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
614 if (err == JVMTI_ERROR_NONE) {
615 memcpy(*name_ptr, name, len);
616 }
617 return err;
618 } /* end GetErrorName */
619
620
621 jvmtiError
622 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
623 switch (flag) {
624 case JVMTI_VERBOSE_OTHER:
625 // ignore
626 break;
627 case JVMTI_VERBOSE_CLASS:
628 TraceClassLoading = value != 0;
629 TraceClassUnloading = value != 0;
630 break;
631 case JVMTI_VERBOSE_GC:
632 {
633 MutexLocker ml(LogConfiguration_lock);
634 if (value == 0) {
635 LogConfiguration::parse_log_arguments("stdout", "gc=off", NULL, NULL, NULL);
636 } else {
637 LogConfiguration::parse_log_arguments("stdout", "gc", NULL, NULL, NULL);
638 }
639 }
640 break;
641 case JVMTI_VERBOSE_JNI:
642 PrintJNIResolving = value != 0;
643 break;
644 default:
645 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
646 };
647 return JVMTI_ERROR_NONE;
648 } /* end SetVerboseFlag */
649
650
651 // format_ptr - pre-checked for NULL
652 jvmtiError
653 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
654 *format_ptr = JVMTI_JLOCATION_JVMBCI;
655 return JVMTI_ERROR_NONE;
656 } /* end GetJLocationFormat */
657
658 //
659 // Thread functions
660 //
661
662 // Threads_lock NOT held
663 // thread - NOT pre-checked
664 // thread_state_ptr - pre-checked for NULL
665 jvmtiError
666 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
667 jint state;
668 oop thread_oop;
669 JavaThread* thr;
670
671 if (thread == NULL) {
672 thread_oop = JavaThread::current()->threadObj();
673 } else {
674 thread_oop = JNIHandles::resolve_external_guard(thread);
675 }
676
677 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
678 return JVMTI_ERROR_INVALID_THREAD;
679 }
680
681 // get most state bits
682 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
683
684 // add more state bits
685 thr = java_lang_Thread::thread(thread_oop);
686 if (thr != NULL) {
687 JavaThreadState jts = thr->thread_state();
688
689 if (thr->is_being_ext_suspended()) {
690 state |= JVMTI_THREAD_STATE_SUSPENDED;
691 }
692 if (jts == _thread_in_native) {
693 state |= JVMTI_THREAD_STATE_IN_NATIVE;
694 }
695 OSThread* osThread = thr->osthread();
696 if (osThread != NULL && osThread->interrupted()) {
697 state |= JVMTI_THREAD_STATE_INTERRUPTED;
698 }
699 }
700
701 *thread_state_ptr = state;
702 return JVMTI_ERROR_NONE;
703 } /* end GetThreadState */
704
705
706 // thread_ptr - pre-checked for NULL
707 jvmtiError
708 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
709 JavaThread* current_thread = JavaThread::current();
710 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
711 return JVMTI_ERROR_NONE;
712 } /* end GetCurrentThread */
713
714
715 // threads_count_ptr - pre-checked for NULL
716 // threads_ptr - pre-checked for NULL
717 jvmtiError
718 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
719 int nthreads = 0;
720 Handle *thread_objs = NULL;
721 ResourceMark rm;
722 HandleMark hm;
723
724 // enumerate threads (including agent threads)
725 ThreadsListEnumerator tle(Thread::current(), true);
726 nthreads = tle.num_threads();
727 *threads_count_ptr = nthreads;
728
729 if (nthreads == 0) {
730 *threads_ptr = NULL;
731 return JVMTI_ERROR_NONE;
732 }
733
734 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
735 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
736
737 for (int i=0; i < nthreads; i++) {
738 thread_objs[i] = Handle(tle.get_threadObj(i));
739 }
740
741 // have to make global handles outside of Threads_lock
742 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
743 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
744
745 *threads_ptr = jthreads;
746 return JVMTI_ERROR_NONE;
747 } /* end GetAllThreads */
748
749
750 // Threads_lock NOT held, java_thread not protected by lock
751 // java_thread - pre-checked
752 jvmtiError
753 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
754 // don't allow hidden thread suspend request.
755 if (java_thread->is_hidden_from_external_view()) {
756 return (JVMTI_ERROR_NONE);
757 }
758
759 {
760 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
761 if (java_thread->is_external_suspend()) {
762 // don't allow nested external suspend requests.
763 return (JVMTI_ERROR_THREAD_SUSPENDED);
764 }
765 if (java_thread->is_exiting()) { // thread is in the process of exiting
766 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
767 }
768 java_thread->set_external_suspend();
769 }
770
771 if (!JvmtiSuspendControl::suspend(java_thread)) {
772 // the thread was in the process of exiting
773 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
774 }
775 return JVMTI_ERROR_NONE;
776 } /* end SuspendThread */
777
778
779 // request_count - pre-checked to be greater than or equal to 0
780 // request_list - pre-checked for NULL
781 // results - pre-checked for NULL
782 jvmtiError
783 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
784 int needSafepoint = 0; // > 0 if we need a safepoint
785 for (int i = 0; i < request_count; i++) {
786 JavaThread *java_thread = get_JavaThread(request_list[i]);
787 if (java_thread == NULL) {
788 results[i] = JVMTI_ERROR_INVALID_THREAD;
789 continue;
790 }
791 // the thread has not yet run or has exited (not on threads list)
792 if (java_thread->threadObj() == NULL) {
793 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
794 continue;
795 }
796 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
797 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
798 continue;
799 }
800 // don't allow hidden thread suspend request.
801 if (java_thread->is_hidden_from_external_view()) {
802 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
803 continue;
804 }
805
806 {
807 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
808 if (java_thread->is_external_suspend()) {
809 // don't allow nested external suspend requests.
810 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
811 continue;
812 }
813 if (java_thread->is_exiting()) { // thread is in the process of exiting
814 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
815 continue;
816 }
817 java_thread->set_external_suspend();
818 }
819 if (java_thread->thread_state() == _thread_in_native) {
820 // We need to try and suspend native threads here. Threads in
821 // other states will self-suspend on their next transition.
822 if (!JvmtiSuspendControl::suspend(java_thread)) {
823 // The thread was in the process of exiting. Force another
824 // safepoint to make sure that this thread transitions.
825 needSafepoint++;
826 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
827 continue;
828 }
829 } else {
830 needSafepoint++;
831 }
832 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
833 }
834 if (needSafepoint > 0) {
835 VM_ForceSafepoint vfs;
836 VMThread::execute(&vfs);
837 }
838 // per-thread suspend results returned via results parameter
839 return JVMTI_ERROR_NONE;
840 } /* end SuspendThreadList */
841
842
843 // Threads_lock NOT held, java_thread not protected by lock
844 // java_thread - pre-checked
845 jvmtiError
846 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
847 // don't allow hidden thread resume request.
848 if (java_thread->is_hidden_from_external_view()) {
849 return JVMTI_ERROR_NONE;
850 }
851
852 if (!java_thread->is_being_ext_suspended()) {
853 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
854 }
855
856 if (!JvmtiSuspendControl::resume(java_thread)) {
857 return JVMTI_ERROR_INTERNAL;
858 }
859 return JVMTI_ERROR_NONE;
860 } /* end ResumeThread */
861
862
863 // request_count - pre-checked to be greater than or equal to 0
864 // request_list - pre-checked for NULL
865 // results - pre-checked for NULL
866 jvmtiError
867 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
868 for (int i = 0; i < request_count; i++) {
869 JavaThread *java_thread = get_JavaThread(request_list[i]);
870 if (java_thread == NULL) {
871 results[i] = JVMTI_ERROR_INVALID_THREAD;
872 continue;
873 }
874 // don't allow hidden thread resume request.
875 if (java_thread->is_hidden_from_external_view()) {
876 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
877 continue;
878 }
879 if (!java_thread->is_being_ext_suspended()) {
880 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
881 continue;
882 }
883
884 if (!JvmtiSuspendControl::resume(java_thread)) {
885 results[i] = JVMTI_ERROR_INTERNAL;
886 continue;
887 }
888
889 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
890 }
891 // per-thread resume results returned via results parameter
892 return JVMTI_ERROR_NONE;
893 } /* end ResumeThreadList */
894
895
896 // Threads_lock NOT held, java_thread not protected by lock
897 // java_thread - pre-checked
898 jvmtiError
899 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
900 oop e = JNIHandles::resolve_external_guard(exception);
901 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
902
903 JavaThread::send_async_exception(java_thread->threadObj(), e);
904
905 return JVMTI_ERROR_NONE;
906
907 } /* end StopThread */
908
909
910 // Threads_lock NOT held
911 // thread - NOT pre-checked
912 jvmtiError
913 JvmtiEnv::InterruptThread(jthread thread) {
914 oop thread_oop = JNIHandles::resolve_external_guard(thread);
915 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
916 return JVMTI_ERROR_INVALID_THREAD;
917
918 JavaThread* current_thread = JavaThread::current();
919
920 // Todo: this is a duplicate of JVM_Interrupt; share code in future
921 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
922 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
923 // We need to re-resolve the java_thread, since a GC might have happened during the
924 // acquire of the lock
925
926 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
927 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
928
929 Thread::interrupt(java_thread);
930
931 return JVMTI_ERROR_NONE;
932 } /* end InterruptThread */
933
934
935 // Threads_lock NOT held
936 // thread - NOT pre-checked
937 // info_ptr - pre-checked for NULL
938 jvmtiError
939 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
940 ResourceMark rm;
941 HandleMark hm;
942
943 JavaThread* current_thread = JavaThread::current();
944
945 // if thread is NULL the current thread is used
946 oop thread_oop;
947 if (thread == NULL) {
948 thread_oop = current_thread->threadObj();
949 } else {
950 thread_oop = JNIHandles::resolve_external_guard(thread);
951 }
952 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
953 return JVMTI_ERROR_INVALID_THREAD;
954
955 Handle thread_obj(current_thread, thread_oop);
956 Handle name;
957 ThreadPriority priority;
958 Handle thread_group;
959 Handle context_class_loader;
960 bool is_daemon;
961
962 { MutexLocker mu(Threads_lock);
963
964 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
965 priority = java_lang_Thread::priority(thread_obj());
966 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
967 is_daemon = java_lang_Thread::is_daemon(thread_obj());
968
969 oop loader = java_lang_Thread::context_class_loader(thread_obj());
970 context_class_loader = Handle(current_thread, loader);
971 }
972 { const char *n;
973
974 if (name() != NULL) {
975 n = java_lang_String::as_utf8_string(name());
976 } else {
977 n = UNICODE::as_utf8((jchar*) NULL, 0);
978 }
979
980 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
981 if (info_ptr->name == NULL)
982 return JVMTI_ERROR_OUT_OF_MEMORY;
983
984 strcpy(info_ptr->name, n);
985 }
986 info_ptr->is_daemon = is_daemon;
987 info_ptr->priority = priority;
988
989 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
990 jni_reference(context_class_loader);
991 info_ptr->thread_group = jni_reference(thread_group);
992
993 return JVMTI_ERROR_NONE;
994 } /* end GetThreadInfo */
995
996
997 // Threads_lock NOT held, java_thread not protected by lock
998 // java_thread - pre-checked
999 // owned_monitor_count_ptr - pre-checked for NULL
1000 // owned_monitors_ptr - pre-checked for NULL
1001 jvmtiError
1002 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1003 jvmtiError err = JVMTI_ERROR_NONE;
1004 JavaThread* calling_thread = JavaThread::current();
1005
1006 // growable array of jvmti monitors info on the C-heap
1007 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1008 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1009
1010 // It is only safe to perform the direct operation on the current
1011 // thread. All other usage needs to use a vm-safepoint-op for safety.
1012 if (java_thread == calling_thread) {
1013 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1014 } else {
1015 // JVMTI get monitors info at safepoint. Do not require target thread to
1016 // be suspended.
1017 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1018 VMThread::execute(&op);
1019 err = op.result();
1020 }
1021 jint owned_monitor_count = owned_monitors_list->length();
1022 if (err == JVMTI_ERROR_NONE) {
1023 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1024 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1025 // copy into the returned array
1026 for (int i = 0; i < owned_monitor_count; i++) {
1027 (*owned_monitors_ptr)[i] =
1028 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1029 }
1030 *owned_monitor_count_ptr = owned_monitor_count;
1031 }
1032 }
1033 // clean up.
1034 for (int i = 0; i < owned_monitor_count; i++) {
1035 deallocate((unsigned char*)owned_monitors_list->at(i));
1036 }
1037 delete owned_monitors_list;
1038
1039 return err;
1040 } /* end GetOwnedMonitorInfo */
1041
1042
1043 // Threads_lock NOT held, java_thread not protected by lock
1044 // java_thread - pre-checked
1045 // monitor_info_count_ptr - pre-checked for NULL
1046 // monitor_info_ptr - pre-checked for NULL
1047 jvmtiError
1048 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1049 jvmtiError err = JVMTI_ERROR_NONE;
1050 JavaThread* calling_thread = JavaThread::current();
1051
1052 // growable array of jvmti monitors info on the C-heap
1053 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1054 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1055
1056 // It is only safe to perform the direct operation on the current
1057 // thread. All other usage needs to use a vm-safepoint-op for safety.
1058 if (java_thread == calling_thread) {
1059 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1060 } else {
1061 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1062 // be suspended.
1063 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1064 VMThread::execute(&op);
1065 err = op.result();
1066 }
1067
1068 jint owned_monitor_count = owned_monitors_list->length();
1069 if (err == JVMTI_ERROR_NONE) {
1070 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1071 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1072 // copy to output array.
1073 for (int i = 0; i < owned_monitor_count; i++) {
1074 (*monitor_info_ptr)[i].monitor =
1075 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1076 (*monitor_info_ptr)[i].stack_depth =
1077 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1078 }
1079 }
1080 *monitor_info_count_ptr = owned_monitor_count;
1081 }
1082
1083 // clean up.
1084 for (int i = 0; i < owned_monitor_count; i++) {
1085 deallocate((unsigned char*)owned_monitors_list->at(i));
1086 }
1087 delete owned_monitors_list;
1088
1089 return err;
1090 } /* end GetOwnedMonitorStackDepthInfo */
1091
1092
1093 // Threads_lock NOT held, java_thread not protected by lock
1094 // java_thread - pre-checked
1095 // monitor_ptr - pre-checked for NULL
1096 jvmtiError
1097 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1098 jvmtiError err = JVMTI_ERROR_NONE;
1099 JavaThread* calling_thread = JavaThread::current();
1100
1101 // It is only safe to perform the direct operation on the current
1102 // thread. All other usage needs to use a vm-safepoint-op for safety.
1103 if (java_thread == calling_thread) {
1104 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1105 } else {
1106 // get contended monitor information at safepoint.
1107 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1108 VMThread::execute(&op);
1109 err = op.result();
1110 }
1111 return err;
1112 } /* end GetCurrentContendedMonitor */
1113
1114
1115 // Threads_lock NOT held
1116 // thread - NOT pre-checked
1117 // proc - pre-checked for NULL
1118 // arg - NULL is a valid value, must be checked
1119 jvmtiError
1120 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1121 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1122 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1123 return JVMTI_ERROR_INVALID_THREAD;
1124 }
1125 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1126 return JVMTI_ERROR_INVALID_PRIORITY;
1127 }
1128
1129 //Thread-self
1130 JavaThread* current_thread = JavaThread::current();
1131
1132 Handle thread_hndl(current_thread, thread_oop);
1133 {
1134 MutexLocker mu(Threads_lock); // grab Threads_lock
1135
1136 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1137
1138 // At this point it may be possible that no osthread was created for the
1139 // JavaThread due to lack of memory.
1140 if (new_thread == NULL || new_thread->osthread() == NULL) {
1141 if (new_thread) delete new_thread;
1142 return JVMTI_ERROR_OUT_OF_MEMORY;
1143 }
1144
1145 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1146 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1147 java_lang_Thread::set_daemon(thread_hndl());
1148
1149 new_thread->set_threadObj(thread_hndl());
1150 Threads::add(new_thread);
1151 Thread::start(new_thread);
1152 } // unlock Threads_lock
1153
1154 return JVMTI_ERROR_NONE;
1155 } /* end RunAgentThread */
1156
1157 //
1158 // Thread Group functions
1159 //
1160
1161 // group_count_ptr - pre-checked for NULL
1162 // groups_ptr - pre-checked for NULL
1163 jvmtiError
1164 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1165 JavaThread* current_thread = JavaThread::current();
1166
1167 // Only one top level thread group now.
1168 *group_count_ptr = 1;
1169
1170 // Allocate memory to store global-refs to the thread groups.
1171 // Assume this area is freed by caller.
1172 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1173
1174 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1175
1176 // Convert oop to Handle, then convert Handle to global-ref.
1177 {
1178 HandleMark hm(current_thread);
1179 Handle system_thread_group(current_thread, Universe::system_thread_group());
1180 *groups_ptr[0] = jni_reference(system_thread_group);
1181 }
1182
1183 return JVMTI_ERROR_NONE;
1184 } /* end GetTopThreadGroups */
1185
1186
1187 // info_ptr - pre-checked for NULL
1188 jvmtiError
1189 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1190 ResourceMark rm;
1191 HandleMark hm;
1192
1193 JavaThread* current_thread = JavaThread::current();
1194
1195 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1196 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1197
1198 const char* name;
1199 Handle parent_group;
1200 bool is_daemon;
1201 ThreadPriority max_priority;
1202
1203 { MutexLocker mu(Threads_lock);
1204
1205 name = java_lang_ThreadGroup::name(group_obj());
1206 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1207 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1208 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1209 }
1210
1211 info_ptr->is_daemon = is_daemon;
1212 info_ptr->max_priority = max_priority;
1213 info_ptr->parent = jni_reference(parent_group);
1214
1215 if (name != NULL) {
1216 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1217 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1218 strcpy(info_ptr->name, name);
1219 } else {
1220 info_ptr->name = NULL;
1221 }
1222
1223 return JVMTI_ERROR_NONE;
1224 } /* end GetThreadGroupInfo */
1225
1226
1227 // thread_count_ptr - pre-checked for NULL
1228 // threads_ptr - pre-checked for NULL
1229 // group_count_ptr - pre-checked for NULL
1230 // groups_ptr - pre-checked for NULL
1231 jvmtiError
1232 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1233 JavaThread* current_thread = JavaThread::current();
1234 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1235 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1236
1237 Handle *thread_objs = NULL;
1238 Handle *group_objs = NULL;
1239 int nthreads = 0;
1240 int ngroups = 0;
1241 int hidden_threads = 0;
1242
1243 ResourceMark rm;
1244 HandleMark hm;
1245
1246 Handle group_hdl(current_thread, group_obj);
1247
1248 { MutexLocker mu(Threads_lock);
1249
1250 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1251 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1252
1253 if (nthreads > 0) {
1254 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1255 assert(nthreads <= threads->length(), "too many threads");
1256 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1257 for (int i=0, j=0; i<nthreads; i++) {
1258 oop thread_obj = threads->obj_at(i);
1259 assert(thread_obj != NULL, "thread_obj is NULL");
1260 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1261 // Filter out hidden java threads.
1262 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1263 hidden_threads++;
1264 continue;
1265 }
1266 thread_objs[j++] = Handle(current_thread, thread_obj);
1267 }
1268 nthreads -= hidden_threads;
1269 }
1270 if (ngroups > 0) {
1271 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1272 assert(ngroups <= groups->length(), "too many threads");
1273 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1274 for (int i=0; i<ngroups; i++) {
1275 oop group_obj = groups->obj_at(i);
1276 assert(group_obj != NULL, "group_obj != NULL");
1277 group_objs[i] = Handle(current_thread, group_obj);
1278 }
1279 }
1280 }
1281
1282 // have to make global handles outside of Threads_lock
1283 *group_count_ptr = ngroups;
1284 *thread_count_ptr = nthreads;
1285 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1286 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1287 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1288 return JVMTI_ERROR_OUT_OF_MEMORY;
1289 }
1290 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1291 return JVMTI_ERROR_OUT_OF_MEMORY;
1292 }
1293
1294 return JVMTI_ERROR_NONE;
1295 } /* end GetThreadGroupChildren */
1296
1297
1298 //
1299 // Stack Frame functions
1300 //
1301
1302 // Threads_lock NOT held, java_thread not protected by lock
1303 // java_thread - pre-checked
1304 // max_frame_count - pre-checked to be greater than or equal to 0
1305 // frame_buffer - pre-checked for NULL
1306 // count_ptr - pre-checked for NULL
1307 jvmtiError
1308 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1309 jvmtiError err = JVMTI_ERROR_NONE;
1310
1311 // It is only safe to perform the direct operation on the current
1312 // thread. All other usage needs to use a vm-safepoint-op for safety.
1313 if (java_thread == JavaThread::current()) {
1314 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1315 } else {
1316 // JVMTI get stack trace at safepoint. Do not require target thread to
1317 // be suspended.
1318 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1319 VMThread::execute(&op);
1320 err = op.result();
1321 }
1322
1323 return err;
1324 } /* end GetStackTrace */
1325
1326
1327 // max_frame_count - pre-checked to be greater than or equal to 0
1328 // stack_info_ptr - pre-checked for NULL
1329 // thread_count_ptr - pre-checked for NULL
1330 jvmtiError
1331 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1332 jvmtiError err = JVMTI_ERROR_NONE;
1333 JavaThread* calling_thread = JavaThread::current();
1334
1335 // JVMTI get stack traces at safepoint.
1336 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1337 VMThread::execute(&op);
1338 *thread_count_ptr = op.final_thread_count();
1339 *stack_info_ptr = op.stack_info();
1340 err = op.result();
1341 return err;
1342 } /* end GetAllStackTraces */
1343
1344
1345 // thread_count - pre-checked to be greater than or equal to 0
1346 // thread_list - pre-checked for NULL
1347 // max_frame_count - pre-checked to be greater than or equal to 0
1348 // stack_info_ptr - pre-checked for NULL
1349 jvmtiError
1350 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1351 jvmtiError err = JVMTI_ERROR_NONE;
1352 // JVMTI get stack traces at safepoint.
1353 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1354 VMThread::execute(&op);
1355 err = op.result();
1356 if (err == JVMTI_ERROR_NONE) {
1357 *stack_info_ptr = op.stack_info();
1358 }
1359 return err;
1360 } /* end GetThreadListStackTraces */
1361
1362
1363 // Threads_lock NOT held, java_thread not protected by lock
1364 // java_thread - pre-checked
1365 // count_ptr - pre-checked for NULL
1366 jvmtiError
1367 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1368 jvmtiError err = JVMTI_ERROR_NONE;
1369
1370 // retrieve or create JvmtiThreadState.
1371 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1372 if (state == NULL) {
1373 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1374 }
1375
1376 // It is only safe to perform the direct operation on the current
1377 // thread. All other usage needs to use a vm-safepoint-op for safety.
1378 if (java_thread == JavaThread::current()) {
1379 err = get_frame_count(state, count_ptr);
1380 } else {
1381 // get java stack frame count at safepoint.
1382 VM_GetFrameCount op(this, state, count_ptr);
1383 VMThread::execute(&op);
1384 err = op.result();
1385 }
1386 return err;
1387 } /* end GetFrameCount */
1388
1389
1390 // Threads_lock NOT held, java_thread not protected by lock
1391 // java_thread - pre-checked
1392 jvmtiError
1393 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1394 JavaThread* current_thread = JavaThread::current();
1395 HandleMark hm(current_thread);
1396 uint32_t debug_bits = 0;
1397
1398 // retrieve or create the state
1399 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1400 if (state == NULL) {
1401 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1402 }
1403
1404 // Check if java_thread is fully suspended
1405 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1406 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1407 }
1408 // Check to see if a PopFrame was already in progress
1409 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1410 // Probably possible for JVMTI clients to trigger this, but the
1411 // JPDA backend shouldn't allow this to happen
1412 return JVMTI_ERROR_INTERNAL;
1413 }
1414
1415 {
1416 // Was workaround bug
1417 // 4812902: popFrame hangs if the method is waiting at a synchronize
1418 // Catch this condition and return an error to avoid hanging.
1419 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1420 OSThread* osThread = java_thread->osthread();
1421 if (osThread->get_state() == MONITOR_WAIT) {
1422 return JVMTI_ERROR_OPAQUE_FRAME;
1423 }
1424 }
1425
1426 {
1427 ResourceMark rm(current_thread);
1428 // Check if there are more than one Java frame in this thread, that the top two frames
1429 // are Java (not native) frames, and that there is no intervening VM frame
1430 int frame_count = 0;
1431 bool is_interpreted[2];
1432 intptr_t *frame_sp[2];
1433 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1434 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1435 methodHandle mh(current_thread, vfs.method());
1436 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1437 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1438 frame_sp[frame_count] = vfs.frame_id();
1439 if (++frame_count > 1) break;
1440 }
1441 if (frame_count < 2) {
1442 // We haven't found two adjacent non-native Java frames on the top.
1443 // There can be two situations here:
1444 // 1. There are no more java frames
1445 // 2. Two top java frames are separated by non-java native frames
1446 if(vframeFor(java_thread, 1) == NULL) {
1447 return JVMTI_ERROR_NO_MORE_FRAMES;
1448 } else {
1449 // Intervening non-java native or VM frames separate java frames.
1450 // Current implementation does not support this. See bug #5031735.
1451 // In theory it is possible to pop frames in such cases.
1452 return JVMTI_ERROR_OPAQUE_FRAME;
1453 }
1454 }
1455
1456 // If any of the top 2 frames is a compiled one, need to deoptimize it
1457 for (int i = 0; i < 2; i++) {
1458 if (!is_interpreted[i]) {
1459 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1460 }
1461 }
1462
1463 // Update the thread state to reflect that the top frame is popped
1464 // so that cur_stack_depth is maintained properly and all frameIDs
1465 // are invalidated.
1466 // The current frame will be popped later when the suspended thread
1467 // is resumed and right before returning from VM to Java.
1468 // (see call_VM_base() in assembler_<cpu>.cpp).
1469
1470 // It's fine to update the thread state here because no JVMTI events
1471 // shall be posted for this PopFrame.
1472
1473 // It is only safe to perform the direct operation on the current
1474 // thread. All other usage needs to use a vm-safepoint-op for safety.
1475 if (java_thread == JavaThread::current()) {
1476 state->update_for_pop_top_frame();
1477 } else {
1478 VM_UpdateForPopTopFrame op(state);
1479 VMThread::execute(&op);
1480 jvmtiError err = op.result();
1481 if (err != JVMTI_ERROR_NONE) {
1482 return err;
1483 }
1484 }
1485
1486 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1487 // Set pending step flag for this popframe and it is cleared when next
1488 // step event is posted.
1489 state->set_pending_step_for_popframe();
1490 }
1491
1492 return JVMTI_ERROR_NONE;
1493 } /* end PopFrame */
1494
1495
1496 // Threads_lock NOT held, java_thread not protected by lock
1497 // java_thread - pre-checked
1498 // java_thread - unchecked
1499 // depth - pre-checked as non-negative
1500 // method_ptr - pre-checked for NULL
1501 // location_ptr - pre-checked for NULL
1502 jvmtiError
1503 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1504 jvmtiError err = JVMTI_ERROR_NONE;
1505
1506 // It is only safe to perform the direct operation on the current
1507 // thread. All other usage needs to use a vm-safepoint-op for safety.
1508 if (java_thread == JavaThread::current()) {
1509 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1510 } else {
1511 // JVMTI get java stack frame location at safepoint.
1512 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1513 VMThread::execute(&op);
1514 err = op.result();
1515 }
1516 return err;
1517 } /* end GetFrameLocation */
1518
1519
1520 // Threads_lock NOT held, java_thread not protected by lock
1521 // java_thread - pre-checked
1522 // java_thread - unchecked
1523 // depth - pre-checked as non-negative
1524 jvmtiError
1525 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1526 jvmtiError err = JVMTI_ERROR_NONE;
1527 ResourceMark rm;
1528 uint32_t debug_bits = 0;
1529
1530 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1531 if (state == NULL) {
1532 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1533 }
1534
1535 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1536 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1537 }
1538
1539 if (TraceJVMTICalls) {
1540 JvmtiSuspendControl::print();
1541 }
1542
1543 vframe *vf = vframeFor(java_thread, depth);
1544 if (vf == NULL) {
1545 return JVMTI_ERROR_NO_MORE_FRAMES;
1546 }
1547
1548 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1549 return JVMTI_ERROR_OPAQUE_FRAME;
1550 }
1551
1552 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1553
1554 // It is only safe to perform the direct operation on the current
1555 // thread. All other usage needs to use a vm-safepoint-op for safety.
1556 if (java_thread == JavaThread::current()) {
1557 int frame_number = state->count_frames() - depth;
1558 state->env_thread_state(this)->set_frame_pop(frame_number);
1559 } else {
1560 VM_SetFramePop op(this, state, depth);
1561 VMThread::execute(&op);
1562 err = op.result();
1563 }
1564 return err;
1565 } /* end NotifyFramePop */
1566
1567
1568 //
1569 // Force Early Return functions
1570 //
1571
1572 // Threads_lock NOT held, java_thread not protected by lock
1573 // java_thread - pre-checked
1574 jvmtiError
1575 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1576 jvalue val;
1577 val.l = value;
1578 return force_early_return(java_thread, val, atos);
1579 } /* end ForceEarlyReturnObject */
1580
1581
1582 // Threads_lock NOT held, java_thread not protected by lock
1583 // java_thread - pre-checked
1584 jvmtiError
1585 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1586 jvalue val;
1587 val.i = value;
1588 return force_early_return(java_thread, val, itos);
1589 } /* end ForceEarlyReturnInt */
1590
1591
1592 // Threads_lock NOT held, java_thread not protected by lock
1593 // java_thread - pre-checked
1594 jvmtiError
1595 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1596 jvalue val;
1597 val.j = value;
1598 return force_early_return(java_thread, val, ltos);
1599 } /* end ForceEarlyReturnLong */
1600
1601
1602 // Threads_lock NOT held, java_thread not protected by lock
1603 // java_thread - pre-checked
1604 jvmtiError
1605 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1606 jvalue val;
1607 val.f = value;
1608 return force_early_return(java_thread, val, ftos);
1609 } /* end ForceEarlyReturnFloat */
1610
1611
1612 // Threads_lock NOT held, java_thread not protected by lock
1613 // java_thread - pre-checked
1614 jvmtiError
1615 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1616 jvalue val;
1617 val.d = value;
1618 return force_early_return(java_thread, val, dtos);
1619 } /* end ForceEarlyReturnDouble */
1620
1621
1622 // Threads_lock NOT held, java_thread not protected by lock
1623 // java_thread - pre-checked
1624 jvmtiError
1625 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1626 jvalue val;
1627 val.j = 0L;
1628 return force_early_return(java_thread, val, vtos);
1629 } /* end ForceEarlyReturnVoid */
1630
1631
1632 //
1633 // Heap functions
1634 //
1635
1636 // klass - NULL is a valid value, must be checked
1637 // initial_object - NULL is a valid value, must be checked
1638 // callbacks - pre-checked for NULL
1639 // user_data - NULL is a valid value, must be checked
1640 jvmtiError
1641 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1642 // check klass if provided
1643 Klass* k_oop = NULL;
1644 if (klass != NULL) {
1645 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1646 if (k_mirror == NULL) {
1647 return JVMTI_ERROR_INVALID_CLASS;
1648 }
1649 if (java_lang_Class::is_primitive(k_mirror)) {
1650 return JVMTI_ERROR_NONE;
1651 }
1652 k_oop = java_lang_Class::as_Klass(k_mirror);
1653 if (k_oop == NULL) {
1654 return JVMTI_ERROR_INVALID_CLASS;
1655 }
1656 }
1657
1658 Thread *thread = Thread::current();
1659 HandleMark hm(thread);
1660 KlassHandle kh (thread, k_oop);
1661
1662 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1663 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1664 return JVMTI_ERROR_NONE;
1665 } /* end FollowReferences */
1666
1667
1668 // klass - NULL is a valid value, must be checked
1669 // callbacks - pre-checked for NULL
1670 // user_data - NULL is a valid value, must be checked
1671 jvmtiError
1672 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1673 // check klass if provided
1674 Klass* k_oop = NULL;
1675 if (klass != NULL) {
1676 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1677 if (k_mirror == NULL) {
1678 return JVMTI_ERROR_INVALID_CLASS;
1679 }
1680 if (java_lang_Class::is_primitive(k_mirror)) {
1681 return JVMTI_ERROR_NONE;
1682 }
1683 k_oop = java_lang_Class::as_Klass(k_mirror);
1684 if (k_oop == NULL) {
1685 return JVMTI_ERROR_INVALID_CLASS;
1686 }
1687 }
1688
1689 Thread *thread = Thread::current();
1690 HandleMark hm(thread);
1691 KlassHandle kh (thread, k_oop);
1692
1693 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1694 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1695 return JVMTI_ERROR_NONE;
1696 } /* end IterateThroughHeap */
1697
1698
1699 // tag_ptr - pre-checked for NULL
1700 jvmtiError
1701 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1702 oop o = JNIHandles::resolve_external_guard(object);
1703 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1704 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1705 return JVMTI_ERROR_NONE;
1706 } /* end GetTag */
1707
1708
1709 jvmtiError
1710 JvmtiEnv::SetTag(jobject object, jlong tag) {
1711 oop o = JNIHandles::resolve_external_guard(object);
1712 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1713 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1714 return JVMTI_ERROR_NONE;
1715 } /* end SetTag */
1716
1717
1718 // tag_count - pre-checked to be greater than or equal to 0
1719 // tags - pre-checked for NULL
1720 // count_ptr - pre-checked for NULL
1721 // object_result_ptr - NULL is a valid value, must be checked
1722 // tag_result_ptr - NULL is a valid value, must be checked
1723 jvmtiError
1724 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1725 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1726 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1727 } /* end GetObjectsWithTags */
1728
1729
1730 jvmtiError
1731 JvmtiEnv::ForceGarbageCollection() {
1732 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1733 return JVMTI_ERROR_NONE;
1734 } /* end ForceGarbageCollection */
1735
1736
1737 //
1738 // Heap (1.0) functions
1739 //
1740
1741 // object_reference_callback - pre-checked for NULL
1742 // user_data - NULL is a valid value, must be checked
1743 jvmtiError
1744 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1745 oop o = JNIHandles::resolve_external_guard(object);
1746 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1747 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1748 return JVMTI_ERROR_NONE;
1749 } /* end IterateOverObjectsReachableFromObject */
1750
1751
1752 // heap_root_callback - NULL is a valid value, must be checked
1753 // stack_ref_callback - NULL is a valid value, must be checked
1754 // object_ref_callback - NULL is a valid value, must be checked
1755 // user_data - NULL is a valid value, must be checked
1756 jvmtiError
1757 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1758 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1759 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1760 return JVMTI_ERROR_NONE;
1761 } /* end IterateOverReachableObjects */
1762
1763
1764 // heap_object_callback - pre-checked for NULL
1765 // user_data - NULL is a valid value, must be checked
1766 jvmtiError
1767 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1768 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1769 Thread *thread = Thread::current();
1770 HandleMark hm(thread);
1771 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1772 return JVMTI_ERROR_NONE;
1773 } /* end IterateOverHeap */
1774
1775
1776 // k_mirror - may be primitive, this must be checked
1777 // heap_object_callback - pre-checked for NULL
1778 // user_data - NULL is a valid value, must be checked
1779 jvmtiError
1780 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1781 if (java_lang_Class::is_primitive(k_mirror)) {
1782 // DO PRIMITIVE CLASS PROCESSING
1783 return JVMTI_ERROR_NONE;
1784 }
1785 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1786 if (k_oop == NULL) {
1787 return JVMTI_ERROR_INVALID_CLASS;
1788 }
1789 Thread *thread = Thread::current();
1790 HandleMark hm(thread);
1791 KlassHandle klass (thread, k_oop);
1792 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1793 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1794 return JVMTI_ERROR_NONE;
1795 } /* end IterateOverInstancesOfClass */
1796
1797
1798 //
1799 // Local Variable functions
1800 //
1801
1802 // Threads_lock NOT held, java_thread not protected by lock
1803 // java_thread - pre-checked
1804 // java_thread - unchecked
1805 // depth - pre-checked as non-negative
1806 // value_ptr - pre-checked for NULL
1807 jvmtiError
1808 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1809 JavaThread* current_thread = JavaThread::current();
1810 // rm object is created to clean up the javaVFrame created in
1811 // doit_prologue(), but after doit() is finished with it.
1812 ResourceMark rm(current_thread);
1813
1814 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1815 VMThread::execute(&op);
1816 jvmtiError err = op.result();
1817 if (err != JVMTI_ERROR_NONE) {
1818 return err;
1819 } else {
1820 *value_ptr = op.value().l;
1821 return JVMTI_ERROR_NONE;
1822 }
1823 } /* end GetLocalObject */
1824
1825 // Threads_lock NOT held, java_thread not protected by lock
1826 // java_thread - pre-checked
1827 // java_thread - unchecked
1828 // depth - pre-checked as non-negative
1829 // value - pre-checked for NULL
1830 jvmtiError
1831 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1832 JavaThread* current_thread = JavaThread::current();
1833 // rm object is created to clean up the javaVFrame created in
1834 // doit_prologue(), but after doit() is finished with it.
1835 ResourceMark rm(current_thread);
1836
1837 VM_GetReceiver op(java_thread, current_thread, depth);
1838 VMThread::execute(&op);
1839 jvmtiError err = op.result();
1840 if (err != JVMTI_ERROR_NONE) {
1841 return err;
1842 } else {
1843 *value_ptr = op.value().l;
1844 return JVMTI_ERROR_NONE;
1845 }
1846 } /* end GetLocalInstance */
1847
1848
1849 // Threads_lock NOT held, java_thread not protected by lock
1850 // java_thread - pre-checked
1851 // java_thread - unchecked
1852 // depth - pre-checked as non-negative
1853 // value_ptr - pre-checked for NULL
1854 jvmtiError
1855 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1856 // rm object is created to clean up the javaVFrame created in
1857 // doit_prologue(), but after doit() is finished with it.
1858 ResourceMark rm;
1859
1860 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1861 VMThread::execute(&op);
1862 *value_ptr = op.value().i;
1863 return op.result();
1864 } /* end GetLocalInt */
1865
1866
1867 // Threads_lock NOT held, java_thread not protected by lock
1868 // java_thread - pre-checked
1869 // java_thread - unchecked
1870 // depth - pre-checked as non-negative
1871 // value_ptr - pre-checked for NULL
1872 jvmtiError
1873 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1874 // rm object is created to clean up the javaVFrame created in
1875 // doit_prologue(), but after doit() is finished with it.
1876 ResourceMark rm;
1877
1878 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1879 VMThread::execute(&op);
1880 *value_ptr = op.value().j;
1881 return op.result();
1882 } /* end GetLocalLong */
1883
1884
1885 // Threads_lock NOT held, java_thread not protected by lock
1886 // java_thread - pre-checked
1887 // java_thread - unchecked
1888 // depth - pre-checked as non-negative
1889 // value_ptr - pre-checked for NULL
1890 jvmtiError
1891 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1892 // rm object is created to clean up the javaVFrame created in
1893 // doit_prologue(), but after doit() is finished with it.
1894 ResourceMark rm;
1895
1896 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1897 VMThread::execute(&op);
1898 *value_ptr = op.value().f;
1899 return op.result();
1900 } /* end GetLocalFloat */
1901
1902
1903 // Threads_lock NOT held, java_thread not protected by lock
1904 // java_thread - pre-checked
1905 // java_thread - unchecked
1906 // depth - pre-checked as non-negative
1907 // value_ptr - pre-checked for NULL
1908 jvmtiError
1909 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1910 // rm object is created to clean up the javaVFrame created in
1911 // doit_prologue(), but after doit() is finished with it.
1912 ResourceMark rm;
1913
1914 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1915 VMThread::execute(&op);
1916 *value_ptr = op.value().d;
1917 return op.result();
1918 } /* end GetLocalDouble */
1919
1920
1921 // Threads_lock NOT held, java_thread not protected by lock
1922 // java_thread - pre-checked
1923 // java_thread - unchecked
1924 // depth - pre-checked as non-negative
1925 jvmtiError
1926 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1927 // rm object is created to clean up the javaVFrame created in
1928 // doit_prologue(), but after doit() is finished with it.
1929 ResourceMark rm;
1930 jvalue val;
1931 val.l = value;
1932 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1933 VMThread::execute(&op);
1934 return op.result();
1935 } /* end SetLocalObject */
1936
1937
1938 // Threads_lock NOT held, java_thread not protected by lock
1939 // java_thread - pre-checked
1940 // java_thread - unchecked
1941 // depth - pre-checked as non-negative
1942 jvmtiError
1943 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1944 // rm object is created to clean up the javaVFrame created in
1945 // doit_prologue(), but after doit() is finished with it.
1946 ResourceMark rm;
1947 jvalue val;
1948 val.i = value;
1949 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1950 VMThread::execute(&op);
1951 return op.result();
1952 } /* end SetLocalInt */
1953
1954
1955 // Threads_lock NOT held, java_thread not protected by lock
1956 // java_thread - pre-checked
1957 // java_thread - unchecked
1958 // depth - pre-checked as non-negative
1959 jvmtiError
1960 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1961 // rm object is created to clean up the javaVFrame created in
1962 // doit_prologue(), but after doit() is finished with it.
1963 ResourceMark rm;
1964 jvalue val;
1965 val.j = value;
1966 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1967 VMThread::execute(&op);
1968 return op.result();
1969 } /* end SetLocalLong */
1970
1971
1972 // Threads_lock NOT held, java_thread not protected by lock
1973 // java_thread - pre-checked
1974 // java_thread - unchecked
1975 // depth - pre-checked as non-negative
1976 jvmtiError
1977 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1978 // rm object is created to clean up the javaVFrame created in
1979 // doit_prologue(), but after doit() is finished with it.
1980 ResourceMark rm;
1981 jvalue val;
1982 val.f = value;
1983 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1984 VMThread::execute(&op);
1985 return op.result();
1986 } /* end SetLocalFloat */
1987
1988
1989 // Threads_lock NOT held, java_thread not protected by lock
1990 // java_thread - pre-checked
1991 // java_thread - unchecked
1992 // depth - pre-checked as non-negative
1993 jvmtiError
1994 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1995 // rm object is created to clean up the javaVFrame created in
1996 // doit_prologue(), but after doit() is finished with it.
1997 ResourceMark rm;
1998 jvalue val;
1999 val.d = value;
2000 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2001 VMThread::execute(&op);
2002 return op.result();
2003 } /* end SetLocalDouble */
2004
2005
2006 //
2007 // Breakpoint functions
2008 //
2009
2010 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2011 jvmtiError
2012 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2013 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2014 if (location < 0) { // simple invalid location check first
2015 return JVMTI_ERROR_INVALID_LOCATION;
2016 }
2017 // verify that the breakpoint is not past the end of the method
2018 if (location >= (jlocation) method_oop->code_size()) {
2019 return JVMTI_ERROR_INVALID_LOCATION;
2020 }
2021
2022 ResourceMark rm;
2023 JvmtiBreakpoint bp(method_oop, location);
2024 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2025 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2026 return JVMTI_ERROR_DUPLICATE;
2027
2028 if (TraceJVMTICalls) {
2029 jvmti_breakpoints.print();
2030 }
2031
2032 return JVMTI_ERROR_NONE;
2033 } /* end SetBreakpoint */
2034
2035
2036 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2037 jvmtiError
2038 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2039 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2040
2041 if (location < 0) { // simple invalid location check first
2042 return JVMTI_ERROR_INVALID_LOCATION;
2043 }
2044
2045 // verify that the breakpoint is not past the end of the method
2046 if (location >= (jlocation) method_oop->code_size()) {
2047 return JVMTI_ERROR_INVALID_LOCATION;
2048 }
2049
2050 JvmtiBreakpoint bp(method_oop, location);
2051
2052 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2053 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2054 return JVMTI_ERROR_NOT_FOUND;
2055
2056 if (TraceJVMTICalls) {
2057 jvmti_breakpoints.print();
2058 }
2059
2060 return JVMTI_ERROR_NONE;
2061 } /* end ClearBreakpoint */
2062
2063
2064 //
2065 // Watched Field functions
2066 //
2067
2068 jvmtiError
2069 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2070 // make sure we haven't set this watch before
2071 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2072 fdesc_ptr->set_is_field_access_watched(true);
2073
2074 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2075
2076 return JVMTI_ERROR_NONE;
2077 } /* end SetFieldAccessWatch */
2078
2079
2080 jvmtiError
2081 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2082 // make sure we have a watch to clear
2083 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2084 fdesc_ptr->set_is_field_access_watched(false);
2085
2086 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2087
2088 return JVMTI_ERROR_NONE;
2089 } /* end ClearFieldAccessWatch */
2090
2091
2092 jvmtiError
2093 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2094 // make sure we haven't set this watch before
2095 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2096 fdesc_ptr->set_is_field_modification_watched(true);
2097
2098 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2099
2100 return JVMTI_ERROR_NONE;
2101 } /* end SetFieldModificationWatch */
2102
2103
2104 jvmtiError
2105 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2106 // make sure we have a watch to clear
2107 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2108 fdesc_ptr->set_is_field_modification_watched(false);
2109
2110 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2111
2112 return JVMTI_ERROR_NONE;
2113 } /* end ClearFieldModificationWatch */
2114
2115 //
2116 // Class functions
2117 //
2118
2119
2120 // k_mirror - may be primitive, this must be checked
2121 // signature_ptr - NULL is a valid value, must be checked
2122 // generic_ptr - NULL is a valid value, must be checked
2123 jvmtiError
2124 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2125 ResourceMark rm;
2126 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2127 Klass* k = NULL;
2128 if (!isPrimitive) {
2129 k = java_lang_Class::as_Klass(k_mirror);
2130 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2131 }
2132 if (signature_ptr != NULL) {
2133 char* result = NULL;
2134 if (isPrimitive) {
2135 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2136 result = (char*) jvmtiMalloc(2);
2137 result[0] = tchar;
2138 result[1] = '\0';
2139 } else {
2140 const char* class_sig = k->signature_name();
2141 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2142 strcpy(result, class_sig);
2143 }
2144 *signature_ptr = result;
2145 }
2146 if (generic_ptr != NULL) {
2147 *generic_ptr = NULL;
2148 if (!isPrimitive && k->is_instance_klass()) {
2149 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2150 if (soo != NULL) {
2151 const char *gen_sig = soo->as_C_string();
2152 if (gen_sig != NULL) {
2153 char* gen_result;
2154 jvmtiError err = allocate(strlen(gen_sig) + 1,
2155 (unsigned char **)&gen_result);
2156 if (err != JVMTI_ERROR_NONE) {
2157 return err;
2158 }
2159 strcpy(gen_result, gen_sig);
2160 *generic_ptr = gen_result;
2161 }
2162 }
2163 }
2164 }
2165 return JVMTI_ERROR_NONE;
2166 } /* end GetClassSignature */
2167
2168
2169 // k_mirror - may be primitive, this must be checked
2170 // status_ptr - pre-checked for NULL
2171 jvmtiError
2172 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2173 jint result = 0;
2174 if (java_lang_Class::is_primitive(k_mirror)) {
2175 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2176 } else {
2177 Klass* k = java_lang_Class::as_Klass(k_mirror);
2178 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2179 result = k->jvmti_class_status();
2180 }
2181 *status_ptr = result;
2182
2183 return JVMTI_ERROR_NONE;
2184 } /* end GetClassStatus */
2185
2186
2187 // k_mirror - may be primitive, this must be checked
2188 // source_name_ptr - pre-checked for NULL
2189 jvmtiError
2190 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2191 if (java_lang_Class::is_primitive(k_mirror)) {
2192 return JVMTI_ERROR_ABSENT_INFORMATION;
2193 }
2194 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2195 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2196
2197 if (!k_klass->is_instance_klass()) {
2198 return JVMTI_ERROR_ABSENT_INFORMATION;
2199 }
2200
2201 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2202 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2203 {
2204 JavaThread* current_thread = JavaThread::current();
2205 ResourceMark rm(current_thread);
2206 const char* sfncp = (const char*) sfnOop->as_C_string();
2207 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2208 strcpy(*source_name_ptr, sfncp);
2209 }
2210
2211 return JVMTI_ERROR_NONE;
2212 } /* end GetSourceFileName */
2213
2214
2215 // k_mirror - may be primitive, this must be checked
2216 // modifiers_ptr - pre-checked for NULL
2217 jvmtiError
2218 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2219 JavaThread* current_thread = JavaThread::current();
2220 jint result = 0;
2221 if (!java_lang_Class::is_primitive(k_mirror)) {
2222 Klass* k = java_lang_Class::as_Klass(k_mirror);
2223 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2224 result = k->compute_modifier_flags(current_thread);
2225 JavaThread* THREAD = current_thread; // pass to macros
2226 if (HAS_PENDING_EXCEPTION) {
2227 CLEAR_PENDING_EXCEPTION;
2228 return JVMTI_ERROR_INTERNAL;
2229 };
2230
2231 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2232 if(k->is_super()) {
2233 result |= JVM_ACC_SUPER;
2234 }
2235 } else {
2236 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2237 }
2238 *modifiers_ptr = result;
2239
2240 return JVMTI_ERROR_NONE;
2241 } /* end GetClassModifiers */
2242
2243
2244 // k_mirror - may be primitive, this must be checked
2245 // method_count_ptr - pre-checked for NULL
2246 // methods_ptr - pre-checked for NULL
2247 jvmtiError
2248 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2249 JavaThread* current_thread = JavaThread::current();
2250 HandleMark hm(current_thread);
2251
2252 if (java_lang_Class::is_primitive(k_mirror)) {
2253 *method_count_ptr = 0;
2254 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2255 return JVMTI_ERROR_NONE;
2256 }
2257 Klass* k = java_lang_Class::as_Klass(k_mirror);
2258 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2259
2260 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2261 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2262 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2263 }
2264
2265 if (!k->is_instance_klass()) {
2266 *method_count_ptr = 0;
2267 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2268 return JVMTI_ERROR_NONE;
2269 }
2270 instanceKlassHandle instanceK_h(current_thread, k);
2271 // Allocate the result and fill it in
2272 int result_length = instanceK_h->methods()->length();
2273 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2274 int index;
2275 bool jmethodids_found = true;
2276
2277 if (JvmtiExport::can_maintain_original_method_order()) {
2278 // Use the original method ordering indices stored in the class, so we can emit
2279 // jmethodIDs in the order they appeared in the class file
2280 for (index = 0; index < result_length; index++) {
2281 Method* m = instanceK_h->methods()->at(index);
2282 int original_index = instanceK_h->method_ordering()->at(index);
2283 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2284 jmethodID id;
2285 if (jmethodids_found) {
2286 id = m->find_jmethod_id_or_null();
2287 if (id == NULL) {
2288 // If we find an uninitialized value, make sure there is
2289 // enough space for all the uninitialized values we might
2290 // find.
2291 instanceK_h->ensure_space_for_methodids(index);
2292 jmethodids_found = false;
2293 id = m->jmethod_id();
2294 }
2295 } else {
2296 id = m->jmethod_id();
2297 }
2298 result_list[original_index] = id;
2299 }
2300 } else {
2301 // otherwise just copy in any order
2302 for (index = 0; index < result_length; index++) {
2303 Method* m = instanceK_h->methods()->at(index);
2304 jmethodID id;
2305 if (jmethodids_found) {
2306 id = m->find_jmethod_id_or_null();
2307 if (id == NULL) {
2308 // If we find an uninitialized value, make sure there is
2309 // enough space for all the uninitialized values we might
2310 // find.
2311 instanceK_h->ensure_space_for_methodids(index);
2312 jmethodids_found = false;
2313 id = m->jmethod_id();
2314 }
2315 } else {
2316 id = m->jmethod_id();
2317 }
2318 result_list[index] = id;
2319 }
2320 }
2321 // Fill in return value.
2322 *method_count_ptr = result_length;
2323 *methods_ptr = result_list;
2324
2325 return JVMTI_ERROR_NONE;
2326 } /* end GetClassMethods */
2327
2328
2329 // k_mirror - may be primitive, this must be checked
2330 // field_count_ptr - pre-checked for NULL
2331 // fields_ptr - pre-checked for NULL
2332 jvmtiError
2333 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2334 if (java_lang_Class::is_primitive(k_mirror)) {
2335 *field_count_ptr = 0;
2336 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2337 return JVMTI_ERROR_NONE;
2338 }
2339 JavaThread* current_thread = JavaThread::current();
2340 HandleMark hm(current_thread);
2341 Klass* k = java_lang_Class::as_Klass(k_mirror);
2342 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2343
2344 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2345 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2346 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2347 }
2348
2349 if (!k->is_instance_klass()) {
2350 *field_count_ptr = 0;
2351 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2352 return JVMTI_ERROR_NONE;
2353 }
2354
2355
2356 instanceKlassHandle instanceK_h(current_thread, k);
2357
2358 int result_count = 0;
2359 // First, count the fields.
2360 FilteredFieldStream flds(instanceK_h, true, true);
2361 result_count = flds.field_count();
2362
2363 // Allocate the result and fill it in
2364 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2365 // The JVMTI spec requires fields in the order they occur in the class file,
2366 // this is the reverse order of what FieldStream hands out.
2367 int id_index = (result_count - 1);
2368
2369 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2370 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2371 instanceK_h, src_st.offset(),
2372 src_st.access_flags().is_static());
2373 }
2374 assert(id_index == -1, "just checking");
2375 // Fill in the results
2376 *field_count_ptr = result_count;
2377 *fields_ptr = result_list;
2378
2379 return JVMTI_ERROR_NONE;
2380 } /* end GetClassFields */
2381
2382
2383 // k_mirror - may be primitive, this must be checked
2384 // interface_count_ptr - pre-checked for NULL
2385 // interfaces_ptr - pre-checked for NULL
2386 jvmtiError
2387 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2388 {
2389 if (java_lang_Class::is_primitive(k_mirror)) {
2390 *interface_count_ptr = 0;
2391 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2392 return JVMTI_ERROR_NONE;
2393 }
2394 JavaThread* current_thread = JavaThread::current();
2395 HandleMark hm(current_thread);
2396 Klass* k = java_lang_Class::as_Klass(k_mirror);
2397 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2398
2399 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2400 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2401 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2402
2403 if (!k->is_instance_klass()) {
2404 *interface_count_ptr = 0;
2405 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2406 return JVMTI_ERROR_NONE;
2407 }
2408
2409 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2410 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2411 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2412 for (int i_index = 0; i_index < result_length; i_index += 1) {
2413 Klass* klass_at = interface_list->at(i_index);
2414 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2415 assert(klass_at->is_interface(), "interfaces must be interfaces");
2416 oop mirror_at = klass_at->java_mirror();
2417 Handle handle_at = Handle(current_thread, mirror_at);
2418 result_list[i_index] = (jclass) jni_reference(handle_at);
2419 }
2420 *interface_count_ptr = result_length;
2421 *interfaces_ptr = result_list;
2422 }
2423
2424 return JVMTI_ERROR_NONE;
2425 } /* end GetImplementedInterfaces */
2426
2427
2428 // k_mirror - may be primitive, this must be checked
2429 // minor_version_ptr - pre-checked for NULL
2430 // major_version_ptr - pre-checked for NULL
2431 jvmtiError
2432 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2433 if (java_lang_Class::is_primitive(k_mirror)) {
2434 return JVMTI_ERROR_ABSENT_INFORMATION;
2435 }
2436 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2437 Thread *thread = Thread::current();
2438 HandleMark hm(thread);
2439 KlassHandle klass(thread, k_oop);
2440
2441 jint status = klass->jvmti_class_status();
2442 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2443 return JVMTI_ERROR_INVALID_CLASS;
2444 }
2445 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2446 return JVMTI_ERROR_ABSENT_INFORMATION;
2447 }
2448
2449 instanceKlassHandle ik(thread, k_oop);
2450 *minor_version_ptr = ik->minor_version();
2451 *major_version_ptr = ik->major_version();
2452
2453 return JVMTI_ERROR_NONE;
2454 } /* end GetClassVersionNumbers */
2455
2456
2457 // k_mirror - may be primitive, this must be checked
2458 // constant_pool_count_ptr - pre-checked for NULL
2459 // constant_pool_byte_count_ptr - pre-checked for NULL
2460 // constant_pool_bytes_ptr - pre-checked for NULL
2461 jvmtiError
2462 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2463 if (java_lang_Class::is_primitive(k_mirror)) {
2464 return JVMTI_ERROR_ABSENT_INFORMATION;
2465 }
2466
2467 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2468 Thread *thread = Thread::current();
2469 HandleMark hm(thread);
2470 ResourceMark rm(thread);
2471 KlassHandle klass(thread, k_oop);
2472
2473 jint status = klass->jvmti_class_status();
2474 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2475 return JVMTI_ERROR_INVALID_CLASS;
2476 }
2477 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2478 return JVMTI_ERROR_ABSENT_INFORMATION;
2479 }
2480
2481 instanceKlassHandle ikh(thread, k_oop);
2482 JvmtiConstantPoolReconstituter reconstituter(ikh);
2483 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2484 return reconstituter.get_error();
2485 }
2486
2487 unsigned char *cpool_bytes;
2488 int cpool_size = reconstituter.cpool_size();
2489 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2490 return reconstituter.get_error();
2491 }
2492 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2493 if (res != JVMTI_ERROR_NONE) {
2494 return res;
2495 }
2496 reconstituter.copy_cpool_bytes(cpool_bytes);
2497 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2498 return reconstituter.get_error();
2499 }
2500
2501 constantPoolHandle constants(thread, ikh->constants());
2502 *constant_pool_count_ptr = constants->length();
2503 *constant_pool_byte_count_ptr = cpool_size;
2504 *constant_pool_bytes_ptr = cpool_bytes;
2505
2506 return JVMTI_ERROR_NONE;
2507 } /* end GetConstantPool */
2508
2509
2510 // k_mirror - may be primitive, this must be checked
2511 // is_interface_ptr - pre-checked for NULL
2512 jvmtiError
2513 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2514 {
2515 bool result = false;
2516 if (!java_lang_Class::is_primitive(k_mirror)) {
2517 Klass* k = java_lang_Class::as_Klass(k_mirror);
2518 if (k != NULL && k->is_interface()) {
2519 result = true;
2520 }
2521 }
2522 *is_interface_ptr = result;
2523 }
2524
2525 return JVMTI_ERROR_NONE;
2526 } /* end IsInterface */
2527
2528
2529 // k_mirror - may be primitive, this must be checked
2530 // is_array_class_ptr - pre-checked for NULL
2531 jvmtiError
2532 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2533 {
2534 bool result = false;
2535 if (!java_lang_Class::is_primitive(k_mirror)) {
2536 Klass* k = java_lang_Class::as_Klass(k_mirror);
2537 if (k != NULL && k->is_array_klass()) {
2538 result = true;
2539 }
2540 }
2541 *is_array_class_ptr = result;
2542 }
2543
2544 return JVMTI_ERROR_NONE;
2545 } /* end IsArrayClass */
2546
2547
2548 // k_mirror - may be primitive, this must be checked
2549 // classloader_ptr - pre-checked for NULL
2550 jvmtiError
2551 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2552 {
2553 if (java_lang_Class::is_primitive(k_mirror)) {
2554 *classloader_ptr = (jclass) jni_reference(Handle());
2555 return JVMTI_ERROR_NONE;
2556 }
2557 JavaThread* current_thread = JavaThread::current();
2558 HandleMark hm(current_thread);
2559 Klass* k = java_lang_Class::as_Klass(k_mirror);
2560 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2561
2562 oop result_oop = k->class_loader();
2563 if (result_oop == NULL) {
2564 *classloader_ptr = (jclass) jni_reference(Handle());
2565 return JVMTI_ERROR_NONE;
2566 }
2567 Handle result_handle = Handle(current_thread, result_oop);
2568 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2569 *classloader_ptr = result_jnihandle;
2570 }
2571 return JVMTI_ERROR_NONE;
2572 } /* end GetClassLoader */
2573
2574
2575 // k_mirror - may be primitive, this must be checked
2576 // source_debug_extension_ptr - pre-checked for NULL
2577 jvmtiError
2578 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2579 {
2580 if (java_lang_Class::is_primitive(k_mirror)) {
2581 return JVMTI_ERROR_ABSENT_INFORMATION;
2582 }
2583 Klass* k = java_lang_Class::as_Klass(k_mirror);
2584 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2585 if (!k->is_instance_klass()) {
2586 return JVMTI_ERROR_ABSENT_INFORMATION;
2587 }
2588 char* sde = InstanceKlass::cast(k)->source_debug_extension();
2589 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2590
2591 {
2592 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2593 strcpy(*source_debug_extension_ptr, sde);
2594 }
2595 }
2596
2597 return JVMTI_ERROR_NONE;
2598 } /* end GetSourceDebugExtension */
2599
2600 //
2601 // Object functions
2602 //
2603
2604 // hash_code_ptr - pre-checked for NULL
2605 jvmtiError
2606 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2607 oop mirror = JNIHandles::resolve_external_guard(object);
2608 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2609 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2610
2611 {
2612 jint result = (jint) mirror->identity_hash();
2613 *hash_code_ptr = result;
2614 }
2615 return JVMTI_ERROR_NONE;
2616 } /* end GetObjectHashCode */
2617
2618
2619 // info_ptr - pre-checked for NULL
2620 jvmtiError
2621 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2622 JavaThread* calling_thread = JavaThread::current();
2623 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2624 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2625 // Some of the critical threads were not suspended. go to a safepoint and try again
2626 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2627 VMThread::execute(&op);
2628 err = op.result();
2629 }
2630 return err;
2631 } /* end GetObjectMonitorUsage */
2632
2633
2634 //
2635 // Field functions
2636 //
2637
2638 // name_ptr - NULL is a valid value, must be checked
2639 // signature_ptr - NULL is a valid value, must be checked
2640 // generic_ptr - NULL is a valid value, must be checked
2641 jvmtiError
2642 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2643 JavaThread* current_thread = JavaThread::current();
2644 ResourceMark rm(current_thread);
2645 if (name_ptr == NULL) {
2646 // just don't return the name
2647 } else {
2648 const char* fieldName = fdesc_ptr->name()->as_C_string();
2649 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2650 if (*name_ptr == NULL)
2651 return JVMTI_ERROR_OUT_OF_MEMORY;
2652 strcpy(*name_ptr, fieldName);
2653 }
2654 if (signature_ptr== NULL) {
2655 // just don't return the signature
2656 } else {
2657 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2658 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2659 if (*signature_ptr == NULL)
2660 return JVMTI_ERROR_OUT_OF_MEMORY;
2661 strcpy(*signature_ptr, fieldSignature);
2662 }
2663 if (generic_ptr != NULL) {
2664 *generic_ptr = NULL;
2665 Symbol* soop = fdesc_ptr->generic_signature();
2666 if (soop != NULL) {
2667 const char* gen_sig = soop->as_C_string();
2668 if (gen_sig != NULL) {
2669 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2670 if (err != JVMTI_ERROR_NONE) {
2671 return err;
2672 }
2673 strcpy(*generic_ptr, gen_sig);
2674 }
2675 }
2676 }
2677 return JVMTI_ERROR_NONE;
2678 } /* end GetFieldName */
2679
2680
2681 // declaring_class_ptr - pre-checked for NULL
2682 jvmtiError
2683 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2684
2685 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2686 return JVMTI_ERROR_NONE;
2687 } /* end GetFieldDeclaringClass */
2688
2689
2690 // modifiers_ptr - pre-checked for NULL
2691 jvmtiError
2692 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2693
2694 AccessFlags resultFlags = fdesc_ptr->access_flags();
2695 jint result = resultFlags.as_int();
2696 *modifiers_ptr = result;
2697
2698 return JVMTI_ERROR_NONE;
2699 } /* end GetFieldModifiers */
2700
2701
2702 // is_synthetic_ptr - pre-checked for NULL
2703 jvmtiError
2704 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2705 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2706 return JVMTI_ERROR_NONE;
2707 } /* end IsFieldSynthetic */
2708
2709
2710 //
2711 // Method functions
2712 //
2713
2714 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2715 // name_ptr - NULL is a valid value, must be checked
2716 // signature_ptr - NULL is a valid value, must be checked
2717 // generic_ptr - NULL is a valid value, must be checked
2718 jvmtiError
2719 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2720 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2721 JavaThread* current_thread = JavaThread::current();
2722
2723 ResourceMark rm(current_thread); // get the utf8 name and signature
2724 if (name_ptr == NULL) {
2725 // just don't return the name
2726 } else {
2727 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2728 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2729 strcpy(*name_ptr, utf8_name);
2730 }
2731 if (signature_ptr == NULL) {
2732 // just don't return the signature
2733 } else {
2734 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2735 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2736 strcpy(*signature_ptr, utf8_signature);
2737 }
2738
2739 if (generic_ptr != NULL) {
2740 *generic_ptr = NULL;
2741 Symbol* soop = method_oop->generic_signature();
2742 if (soop != NULL) {
2743 const char* gen_sig = soop->as_C_string();
2744 if (gen_sig != NULL) {
2745 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2746 if (err != JVMTI_ERROR_NONE) {
2747 return err;
2748 }
2749 strcpy(*generic_ptr, gen_sig);
2750 }
2751 }
2752 }
2753 return JVMTI_ERROR_NONE;
2754 } /* end GetMethodName */
2755
2756
2757 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2758 // declaring_class_ptr - pre-checked for NULL
2759 jvmtiError
2760 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2761 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2762 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2763 return JVMTI_ERROR_NONE;
2764 } /* end GetMethodDeclaringClass */
2765
2766
2767 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2768 // modifiers_ptr - pre-checked for NULL
2769 jvmtiError
2770 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2771 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2772 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2773 return JVMTI_ERROR_NONE;
2774 } /* end GetMethodModifiers */
2775
2776
2777 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2778 // max_ptr - pre-checked for NULL
2779 jvmtiError
2780 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2781 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2782 // get max stack
2783 (*max_ptr) = method_oop->max_locals();
2784 return JVMTI_ERROR_NONE;
2785 } /* end GetMaxLocals */
2786
2787
2788 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2789 // size_ptr - pre-checked for NULL
2790 jvmtiError
2791 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2792 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2793 // get size of arguments
2794
2795 (*size_ptr) = method_oop->size_of_parameters();
2796 return JVMTI_ERROR_NONE;
2797 } /* end GetArgumentsSize */
2798
2799
2800 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2801 // entry_count_ptr - pre-checked for NULL
2802 // table_ptr - pre-checked for NULL
2803 jvmtiError
2804 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2805 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2806 if (!method_oop->has_linenumber_table()) {
2807 return (JVMTI_ERROR_ABSENT_INFORMATION);
2808 }
2809
2810 // The line number table is compressed so we don't know how big it is until decompressed.
2811 // Decompression is really fast so we just do it twice.
2812
2813 // Compute size of table
2814 jint num_entries = 0;
2815 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2816 while (stream.read_pair()) {
2817 num_entries++;
2818 }
2819 jvmtiLineNumberEntry *jvmti_table =
2820 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2821
2822 // Fill jvmti table
2823 if (num_entries > 0) {
2824 int index = 0;
2825 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2826 while (stream.read_pair()) {
2827 jvmti_table[index].start_location = (jlocation) stream.bci();
2828 jvmti_table[index].line_number = (jint) stream.line();
2829 index++;
2830 }
2831 assert(index == num_entries, "sanity check");
2832 }
2833
2834 // Set up results
2835 (*entry_count_ptr) = num_entries;
2836 (*table_ptr) = jvmti_table;
2837
2838 return JVMTI_ERROR_NONE;
2839 } /* end GetLineNumberTable */
2840
2841
2842 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2843 // start_location_ptr - pre-checked for NULL
2844 // end_location_ptr - pre-checked for NULL
2845 jvmtiError
2846 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2847
2848 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2849 // get start and end location
2850 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2851 if (method_oop->code_size() == 0) {
2852 // there is no code so there is no start location
2853 (*start_location_ptr) = (jlocation)(-1);
2854 } else {
2855 (*start_location_ptr) = (jlocation)(0);
2856 }
2857
2858 return JVMTI_ERROR_NONE;
2859 } /* end GetMethodLocation */
2860
2861
2862 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2863 // entry_count_ptr - pre-checked for NULL
2864 // table_ptr - pre-checked for NULL
2865 jvmtiError
2866 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2867
2868 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2869 JavaThread* current_thread = JavaThread::current();
2870
2871 // does the klass have any local variable information?
2872 InstanceKlass* ik = method_oop->method_holder();
2873 if (!ik->access_flags().has_localvariable_table()) {
2874 return (JVMTI_ERROR_ABSENT_INFORMATION);
2875 }
2876
2877 ConstantPool* constants = method_oop->constants();
2878 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2879
2880 // in the vm localvariable table representation, 6 consecutive elements in the table
2881 // represent a 6-tuple of shorts
2882 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2883 jint num_entries = method_oop->localvariable_table_length();
2884 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2885 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2886
2887 if (num_entries > 0) {
2888 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2889 for (int i = 0; i < num_entries; i++) {
2890 // get the 5 tuple information from the vm table
2891 jlocation start_location = (jlocation) table[i].start_bci;
2892 jint length = (jint) table[i].length;
2893 int name_index = (int) table[i].name_cp_index;
2894 int signature_index = (int) table[i].descriptor_cp_index;
2895 int generic_signature_index = (int) table[i].signature_cp_index;
2896 jint slot = (jint) table[i].slot;
2897
2898 // get utf8 name and signature
2899 char *name_buf = NULL;
2900 char *sig_buf = NULL;
2901 char *gen_sig_buf = NULL;
2902 {
2903 ResourceMark rm(current_thread);
2904
2905 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2906 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2907 strcpy(name_buf, utf8_name);
2908
2909 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2910 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2911 strcpy(sig_buf, utf8_signature);
2912
2913 if (generic_signature_index > 0) {
2914 const char *utf8_gen_sign = (const char *)
2915 constants->symbol_at(generic_signature_index)->as_utf8();
2916 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2917 strcpy(gen_sig_buf, utf8_gen_sign);
2918 }
2919 }
2920
2921 // fill in the jvmti local variable table
2922 jvmti_table[i].start_location = start_location;
2923 jvmti_table[i].length = length;
2924 jvmti_table[i].name = name_buf;
2925 jvmti_table[i].signature = sig_buf;
2926 jvmti_table[i].generic_signature = gen_sig_buf;
2927 jvmti_table[i].slot = slot;
2928 }
2929 }
2930
2931 // set results
2932 (*entry_count_ptr) = num_entries;
2933 (*table_ptr) = jvmti_table;
2934
2935 return JVMTI_ERROR_NONE;
2936 } /* end GetLocalVariableTable */
2937
2938
2939 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2940 // bytecode_count_ptr - pre-checked for NULL
2941 // bytecodes_ptr - pre-checked for NULL
2942 jvmtiError
2943 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2944 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2945
2946 HandleMark hm;
2947 methodHandle method(method_oop);
2948 jint size = (jint)method->code_size();
2949 jvmtiError err = allocate(size, bytecodes_ptr);
2950 if (err != JVMTI_ERROR_NONE) {
2951 return err;
2952 }
2953
2954 (*bytecode_count_ptr) = size;
2955 // get byte codes
2956 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2957
2958 return JVMTI_ERROR_NONE;
2959 } /* end GetBytecodes */
2960
2961
2962 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2963 // is_native_ptr - pre-checked for NULL
2964 jvmtiError
2965 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2966 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2967 (*is_native_ptr) = method_oop->is_native();
2968 return JVMTI_ERROR_NONE;
2969 } /* end IsMethodNative */
2970
2971
2972 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2973 // is_synthetic_ptr - pre-checked for NULL
2974 jvmtiError
2975 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
2976 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2977 (*is_synthetic_ptr) = method_oop->is_synthetic();
2978 return JVMTI_ERROR_NONE;
2979 } /* end IsMethodSynthetic */
2980
2981
2982 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2983 // is_obsolete_ptr - pre-checked for NULL
2984 jvmtiError
2985 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
2986 if (use_version_1_0_semantics() &&
2987 get_capabilities()->can_redefine_classes == 0) {
2988 // This JvmtiEnv requested version 1.0 semantics and this function
2989 // requires the can_redefine_classes capability in version 1.0 so
2990 // we need to return an error here.
2991 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2992 }
2993
2994 if (method_oop == NULL || method_oop->is_obsolete()) {
2995 *is_obsolete_ptr = true;
2996 } else {
2997 *is_obsolete_ptr = false;
2998 }
2999 return JVMTI_ERROR_NONE;
3000 } /* end IsMethodObsolete */
3001
3002 //
3003 // Raw Monitor functions
3004 //
3005
3006 // name - pre-checked for NULL
3007 // monitor_ptr - pre-checked for NULL
3008 jvmtiError
3009 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3010 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3011 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3012
3013 *monitor_ptr = (jrawMonitorID)rmonitor;
3014
3015 return JVMTI_ERROR_NONE;
3016 } /* end CreateRawMonitor */
3017
3018
3019 // rmonitor - pre-checked for validity
3020 jvmtiError
3021 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3022 if (Threads::number_of_threads() == 0) {
3023 // Remove this monitor from pending raw monitors list
3024 // if it has entered in onload or start phase.
3025 JvmtiPendingMonitors::destroy(rmonitor);
3026 } else {
3027 Thread* thread = Thread::current();
3028 if (rmonitor->is_entered(thread)) {
3029 // The caller owns this monitor which we are about to destroy.
3030 // We exit the underlying synchronization object so that the
3031 // "delete monitor" call below can work without an assertion
3032 // failure on systems that don't like destroying synchronization
3033 // objects that are locked.
3034 int r;
3035 intptr_t recursion = rmonitor->recursions();
3036 for (intptr_t i=0; i <= recursion; i++) {
3037 r = rmonitor->raw_exit(thread);
3038 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3039 if (r != ObjectMonitor::OM_OK) { // robustness
3040 return JVMTI_ERROR_INTERNAL;
3041 }
3042 }
3043 }
3044 if (rmonitor->owner() != NULL) {
3045 // The caller is trying to destroy a monitor that is locked by
3046 // someone else. While this is not forbidden by the JVMTI
3047 // spec, it will cause an assertion failure on systems that don't
3048 // like destroying synchronization objects that are locked.
3049 // We indicate a problem with the error return (and leak the
3050 // monitor's memory).
3051 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3052 }
3053 }
3054
3055 delete rmonitor;
3056
3057 return JVMTI_ERROR_NONE;
3058 } /* end DestroyRawMonitor */
3059
3060
3061 // rmonitor - pre-checked for validity
3062 jvmtiError
3063 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3064 if (Threads::number_of_threads() == 0) {
3065 // No JavaThreads exist so ObjectMonitor enter cannot be
3066 // used, add this raw monitor to the pending list.
3067 // The pending monitors will be actually entered when
3068 // the VM is setup.
3069 // See transition_pending_raw_monitors in create_vm()
3070 // in thread.cpp.
3071 JvmtiPendingMonitors::enter(rmonitor);
3072 } else {
3073 int r = 0;
3074 Thread* thread = Thread::current();
3075
3076 if (thread->is_Java_thread()) {
3077 JavaThread* current_thread = (JavaThread*)thread;
3078
3079 #ifdef PROPER_TRANSITIONS
3080 // Not really unknown but ThreadInVMfromNative does more than we want
3081 ThreadInVMfromUnknown __tiv;
3082 {
3083 ThreadBlockInVM __tbivm(current_thread);
3084 r = rmonitor->raw_enter(current_thread);
3085 }
3086 #else
3087 /* Transition to thread_blocked without entering vm state */
3088 /* This is really evil. Normally you can't undo _thread_blocked */
3089 /* transitions like this because it would cause us to miss a */
3090 /* safepoint but since the thread was already in _thread_in_native */
3091 /* the thread is not leaving a safepoint safe state and it will */
3092 /* block when it tries to return from native. We can't safepoint */
3093 /* block in here because we could deadlock the vmthread. Blech. */
3094
3095 JavaThreadState state = current_thread->thread_state();
3096 assert(state == _thread_in_native, "Must be _thread_in_native");
3097 // frame should already be walkable since we are in native
3098 assert(!current_thread->has_last_Java_frame() ||
3099 current_thread->frame_anchor()->walkable(), "Must be walkable");
3100 current_thread->set_thread_state(_thread_blocked);
3101
3102 r = rmonitor->raw_enter(current_thread);
3103 // restore state, still at a safepoint safe state
3104 current_thread->set_thread_state(state);
3105
3106 #endif /* PROPER_TRANSITIONS */
3107 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3108 } else {
3109 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3110 r = rmonitor->raw_enter(thread);
3111 } else {
3112 ShouldNotReachHere();
3113 }
3114 }
3115
3116 if (r != ObjectMonitor::OM_OK) { // robustness
3117 return JVMTI_ERROR_INTERNAL;
3118 }
3119 }
3120 return JVMTI_ERROR_NONE;
3121 } /* end RawMonitorEnter */
3122
3123
3124 // rmonitor - pre-checked for validity
3125 jvmtiError
3126 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3127 jvmtiError err = JVMTI_ERROR_NONE;
3128
3129 if (Threads::number_of_threads() == 0) {
3130 // No JavaThreads exist so just remove this monitor from the pending list.
3131 // Bool value from exit is false if rmonitor is not in the list.
3132 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3133 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3134 }
3135 } else {
3136 int r = 0;
3137 Thread* thread = Thread::current();
3138
3139 if (thread->is_Java_thread()) {
3140 JavaThread* current_thread = (JavaThread*)thread;
3141 #ifdef PROPER_TRANSITIONS
3142 // Not really unknown but ThreadInVMfromNative does more than we want
3143 ThreadInVMfromUnknown __tiv;
3144 #endif /* PROPER_TRANSITIONS */
3145 r = rmonitor->raw_exit(current_thread);
3146 } else {
3147 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3148 r = rmonitor->raw_exit(thread);
3149 } else {
3150 ShouldNotReachHere();
3151 }
3152 }
3153
3154 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3155 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3156 } else {
3157 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3158 if (r != ObjectMonitor::OM_OK) { // robustness
3159 err = JVMTI_ERROR_INTERNAL;
3160 }
3161 }
3162 }
3163 return err;
3164 } /* end RawMonitorExit */
3165
3166
3167 // rmonitor - pre-checked for validity
3168 jvmtiError
3169 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3170 int r = 0;
3171 Thread* thread = Thread::current();
3172
3173 if (thread->is_Java_thread()) {
3174 JavaThread* current_thread = (JavaThread*)thread;
3175 #ifdef PROPER_TRANSITIONS
3176 // Not really unknown but ThreadInVMfromNative does more than we want
3177 ThreadInVMfromUnknown __tiv;
3178 {
3179 ThreadBlockInVM __tbivm(current_thread);
3180 r = rmonitor->raw_wait(millis, true, current_thread);
3181 }
3182 #else
3183 /* Transition to thread_blocked without entering vm state */
3184 /* This is really evil. Normally you can't undo _thread_blocked */
3185 /* transitions like this because it would cause us to miss a */
3186 /* safepoint but since the thread was already in _thread_in_native */
3187 /* the thread is not leaving a safepoint safe state and it will */
3188 /* block when it tries to return from native. We can't safepoint */
3189 /* block in here because we could deadlock the vmthread. Blech. */
3190
3191 JavaThreadState state = current_thread->thread_state();
3192 assert(state == _thread_in_native, "Must be _thread_in_native");
3193 // frame should already be walkable since we are in native
3194 assert(!current_thread->has_last_Java_frame() ||
3195 current_thread->frame_anchor()->walkable(), "Must be walkable");
3196 current_thread->set_thread_state(_thread_blocked);
3197
3198 r = rmonitor->raw_wait(millis, true, current_thread);
3199 // restore state, still at a safepoint safe state
3200 current_thread->set_thread_state(state);
3201
3202 #endif /* PROPER_TRANSITIONS */
3203 } else {
3204 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3205 r = rmonitor->raw_wait(millis, true, thread);
3206 } else {
3207 ShouldNotReachHere();
3208 }
3209 }
3210
3211 switch (r) {
3212 case ObjectMonitor::OM_INTERRUPTED:
3213 return JVMTI_ERROR_INTERRUPT;
3214 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3215 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3216 }
3217 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3218 if (r != ObjectMonitor::OM_OK) { // robustness
3219 return JVMTI_ERROR_INTERNAL;
3220 }
3221
3222 return JVMTI_ERROR_NONE;
3223 } /* end RawMonitorWait */
3224
3225
3226 // rmonitor - pre-checked for validity
3227 jvmtiError
3228 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3229 int r = 0;
3230 Thread* thread = Thread::current();
3231
3232 if (thread->is_Java_thread()) {
3233 JavaThread* current_thread = (JavaThread*)thread;
3234 // Not really unknown but ThreadInVMfromNative does more than we want
3235 ThreadInVMfromUnknown __tiv;
3236 r = rmonitor->raw_notify(current_thread);
3237 } else {
3238 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3239 r = rmonitor->raw_notify(thread);
3240 } else {
3241 ShouldNotReachHere();
3242 }
3243 }
3244
3245 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3246 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3247 }
3248 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3249 if (r != ObjectMonitor::OM_OK) { // robustness
3250 return JVMTI_ERROR_INTERNAL;
3251 }
3252
3253 return JVMTI_ERROR_NONE;
3254 } /* end RawMonitorNotify */
3255
3256
3257 // rmonitor - pre-checked for validity
3258 jvmtiError
3259 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3260 int r = 0;
3261 Thread* thread = Thread::current();
3262
3263 if (thread->is_Java_thread()) {
3264 JavaThread* current_thread = (JavaThread*)thread;
3265 ThreadInVMfromUnknown __tiv;
3266 r = rmonitor->raw_notifyAll(current_thread);
3267 } else {
3268 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3269 r = rmonitor->raw_notifyAll(thread);
3270 } else {
3271 ShouldNotReachHere();
3272 }
3273 }
3274
3275 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3276 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3277 }
3278 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3279 if (r != ObjectMonitor::OM_OK) { // robustness
3280 return JVMTI_ERROR_INTERNAL;
3281 }
3282
3283 return JVMTI_ERROR_NONE;
3284 } /* end RawMonitorNotifyAll */
3285
3286
3287 //
3288 // JNI Function Interception functions
3289 //
3290
3291
3292 // function_table - pre-checked for NULL
3293 jvmtiError
3294 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3295 // Copy jni function table at safepoint.
3296 VM_JNIFunctionTableCopier copier(function_table);
3297 VMThread::execute(&copier);
3298
3299 return JVMTI_ERROR_NONE;
3300 } /* end SetJNIFunctionTable */
3301
3302
3303 // function_table - pre-checked for NULL
3304 jvmtiError
3305 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3306 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3307 if (*function_table == NULL)
3308 return JVMTI_ERROR_OUT_OF_MEMORY;
3309 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3310 return JVMTI_ERROR_NONE;
3311 } /* end GetJNIFunctionTable */
3312
3313
3314 //
3315 // Event Management functions
3316 //
3317
3318 jvmtiError
3319 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3320 // can only generate two event types
3321 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3322 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3323 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3324 }
3325
3326 // for compiled_method_load events we must check that the environment
3327 // has the can_generate_compiled_method_load_events capability.
3328 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3329 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3330 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3331 }
3332 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3333 } else {
3334 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3335 }
3336
3337 } /* end GenerateEvents */
3338
3339
3340 //
3341 // Extension Mechanism functions
3342 //
3343
3344 // extension_count_ptr - pre-checked for NULL
3345 // extensions - pre-checked for NULL
3346 jvmtiError
3347 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3348 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3349 } /* end GetExtensionFunctions */
3350
3351
3352 // extension_count_ptr - pre-checked for NULL
3353 // extensions - pre-checked for NULL
3354 jvmtiError
3355 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3356 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3357 } /* end GetExtensionEvents */
3358
3359
3360 // callback - NULL is a valid value, must be checked
3361 jvmtiError
3362 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3363 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3364 } /* end SetExtensionEventCallback */
3365
3366 //
3367 // Timers functions
3368 //
3369
3370 // info_ptr - pre-checked for NULL
3371 jvmtiError
3372 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3373 os::current_thread_cpu_time_info(info_ptr);
3374 return JVMTI_ERROR_NONE;
3375 } /* end GetCurrentThreadCpuTimerInfo */
3376
3377
3378 // nanos_ptr - pre-checked for NULL
3379 jvmtiError
3380 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3381 *nanos_ptr = os::current_thread_cpu_time();
3382 return JVMTI_ERROR_NONE;
3383 } /* end GetCurrentThreadCpuTime */
3384
3385
3386 // info_ptr - pre-checked for NULL
3387 jvmtiError
3388 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3389 os::thread_cpu_time_info(info_ptr);
3390 return JVMTI_ERROR_NONE;
3391 } /* end GetThreadCpuTimerInfo */
3392
3393
3394 // Threads_lock NOT held, java_thread not protected by lock
3395 // java_thread - pre-checked
3396 // nanos_ptr - pre-checked for NULL
3397 jvmtiError
3398 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3399 *nanos_ptr = os::thread_cpu_time(java_thread);
3400 return JVMTI_ERROR_NONE;
3401 } /* end GetThreadCpuTime */
3402
3403
3404 // info_ptr - pre-checked for NULL
3405 jvmtiError
3406 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3407 os::javaTimeNanos_info(info_ptr);
3408 return JVMTI_ERROR_NONE;
3409 } /* end GetTimerInfo */
3410
3411
3412 // nanos_ptr - pre-checked for NULL
3413 jvmtiError
3414 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3415 *nanos_ptr = os::javaTimeNanos();
3416 return JVMTI_ERROR_NONE;
3417 } /* end GetTime */
3418
3419
3420 // processor_count_ptr - pre-checked for NULL
3421 jvmtiError
3422 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3423 *processor_count_ptr = os::active_processor_count();
3424 return JVMTI_ERROR_NONE;
3425 } /* end GetAvailableProcessors */
3426
3427 //
3428 // System Properties functions
3429 //
3430
3431 // count_ptr - pre-checked for NULL
3432 // property_ptr - pre-checked for NULL
3433 jvmtiError
3434 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3435 jvmtiError err = JVMTI_ERROR_NONE;
3436
3437 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3438
3439 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3440 if (err != JVMTI_ERROR_NONE) {
3441 return err;
3442 }
3443 int i = 0 ;
3444 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3445 const char *key = p->key();
3446 char **tmp_value = *property_ptr+i;
3447 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3448 if (err == JVMTI_ERROR_NONE) {
3449 strcpy(*tmp_value, key);
3450 } else {
3451 // clean up previously allocated memory.
3452 for (int j=0; j<i; j++) {
3453 Deallocate((unsigned char*)*property_ptr+j);
3454 }
3455 Deallocate((unsigned char*)property_ptr);
3456 break;
3457 }
3458 }
3459 return err;
3460 } /* end GetSystemProperties */
3461
3462
3463 // property - pre-checked for NULL
3464 // value_ptr - pre-checked for NULL
3465 jvmtiError
3466 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3467 jvmtiError err = JVMTI_ERROR_NONE;
3468 const char *value;
3469
3470 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3471 if (value == NULL) {
3472 err = JVMTI_ERROR_NOT_AVAILABLE;
3473 } else {
3474 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3475 if (err == JVMTI_ERROR_NONE) {
3476 strcpy(*value_ptr, value);
3477 }
3478 }
3479 return err;
3480 } /* end GetSystemProperty */
3481
3482
3483 // property - pre-checked for NULL
3484 // value - NULL is a valid value, must be checked
3485 jvmtiError
3486 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3487 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3488
3489 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3490 if (strcmp(property, p->key()) == 0) {
3491 if (p->set_value(value_ptr)) {
3492 err = JVMTI_ERROR_NONE;
3493 }
3494 }
3495 }
3496 return err;
3497 } /* end SetSystemProperty */