1 /*
2 * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "interpreter/bytecodeStream.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "logging/log.hpp"
33 #include "logging/logConfiguration.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayOop.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/jniCheck.hpp"
40 #include "prims/jvm_misc.hpp"
41 #include "prims/jvmtiAgentThread.hpp"
42 #include "prims/jvmtiClassFileReconstituter.hpp"
43 #include "prims/jvmtiCodeBlobEvents.hpp"
44 #include "prims/jvmtiExtensions.hpp"
45 #include "prims/jvmtiGetLoadedClasses.hpp"
46 #include "prims/jvmtiImpl.hpp"
47 #include "prims/jvmtiManageCapabilities.hpp"
48 #include "prims/jvmtiRawMonitor.hpp"
49 #include "prims/jvmtiRedefineClasses.hpp"
50 #include "prims/jvmtiTagMap.hpp"
51 #include "prims/jvmtiThreadState.inline.hpp"
52 #include "prims/jvmtiUtil.hpp"
53 #include "runtime/arguments.hpp"
54 #include "runtime/deoptimization.hpp"
55 #include "runtime/interfaceSupport.hpp"
56 #include "runtime/javaCalls.hpp"
57 #include "runtime/jfieldIDWorkaround.hpp"
58 #include "runtime/osThread.hpp"
59 #include "runtime/reflectionUtils.hpp"
60 #include "runtime/signature.hpp"
61 #include "runtime/thread.inline.hpp"
62 #include "runtime/vframe.hpp"
63 #include "runtime/vmThread.hpp"
64 #include "services/threadService.hpp"
65 #include "utilities/exceptions.hpp"
66 #include "utilities/preserveException.hpp"
67
68
69 #define FIXLATER 0 // REMOVE this when completed.
70
71 // FIXLATER: hook into JvmtiTrace
72 #define TraceJVMTICalls false
73
74 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
75 }
76
77 JvmtiEnv::~JvmtiEnv() {
78 }
79
80 JvmtiEnv*
81 JvmtiEnv::create_a_jvmti(jint version) {
82 return new JvmtiEnv(version);
83 }
84
85 // VM operation class to copy jni function table at safepoint.
86 // More than one java threads or jvmti agents may be reading/
87 // modifying jni function tables. To reduce the risk of bad
88 // interaction b/w these threads it is copied at safepoint.
89 class VM_JNIFunctionTableCopier : public VM_Operation {
90 private:
91 const struct JNINativeInterface_ *_function_table;
92 public:
93 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
94 _function_table = func_tbl;
95 };
96
97 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
98 void doit() {
99 copy_jni_function_table(_function_table);
100 };
101 };
102
103 //
104 // Do not change the "prefix" marker below, everything above it is copied
105 // unchanged into the filled stub, everything below is controlled by the
106 // stub filler (only method bodies are carried forward, and then only for
107 // functionality still in the spec).
108 //
109 // end file prefix
110
111 //
112 // Memory Management functions
113 //
114
115 // mem_ptr - pre-checked for NULL
116 jvmtiError
117 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
118 return allocate(size, mem_ptr);
119 } /* end Allocate */
120
121
122 // mem - NULL is a valid value, must be checked
123 jvmtiError
124 JvmtiEnv::Deallocate(unsigned char* mem) {
125 return deallocate(mem);
126 } /* end Deallocate */
127
128 // Threads_lock NOT held, java_thread not protected by lock
129 // java_thread - pre-checked
130 // data - NULL is a valid value, must be checked
131 jvmtiError
132 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
133 JvmtiThreadState* state = java_thread->jvmti_thread_state();
134 if (state == NULL) {
135 if (data == NULL) {
136 // leaving state unset same as data set to NULL
137 return JVMTI_ERROR_NONE;
138 }
139 // otherwise, create the state
140 state = JvmtiThreadState::state_for(java_thread);
141 if (state == NULL) {
142 return JVMTI_ERROR_THREAD_NOT_ALIVE;
143 }
144 }
145 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
146 return JVMTI_ERROR_NONE;
147 } /* end SetThreadLocalStorage */
148
149
150 // Threads_lock NOT held
151 // thread - NOT pre-checked
152 // data_ptr - pre-checked for NULL
153 jvmtiError
154 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
155 JavaThread* current_thread = JavaThread::current();
156 if (thread == NULL) {
157 JvmtiThreadState* state = current_thread->jvmti_thread_state();
158 *data_ptr = (state == NULL) ? NULL :
159 state->env_thread_state(this)->get_agent_thread_local_storage_data();
160 } else {
161
162 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
163 // the thread to _thread_in_vm. However, when the TLS for a thread
164 // other than the current thread is required we need to transition
165 // from native so as to resolve the jthread.
166
167 ThreadInVMfromNative __tiv(current_thread);
168 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
169 debug_only(VMNativeEntryWrapper __vew;)
170
171 oop thread_oop = JNIHandles::resolve_external_guard(thread);
172 if (thread_oop == NULL) {
173 return JVMTI_ERROR_INVALID_THREAD;
174 }
175 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
176 return JVMTI_ERROR_INVALID_THREAD;
177 }
178 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
179 if (java_thread == NULL) {
180 return JVMTI_ERROR_THREAD_NOT_ALIVE;
181 }
182 JvmtiThreadState* state = java_thread->jvmti_thread_state();
183 *data_ptr = (state == NULL) ? NULL :
184 state->env_thread_state(this)->get_agent_thread_local_storage_data();
185 }
186 return JVMTI_ERROR_NONE;
187 } /* end GetThreadLocalStorage */
188
189 //
190 // Class functions
191 //
192
193 // class_count_ptr - pre-checked for NULL
194 // classes_ptr - pre-checked for NULL
195 jvmtiError
196 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
197 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
198 } /* end GetLoadedClasses */
199
200
201 // initiating_loader - NULL is a valid value, must be checked
202 // class_count_ptr - pre-checked for NULL
203 // classes_ptr - pre-checked for NULL
204 jvmtiError
205 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
206 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
207 class_count_ptr, classes_ptr);
208 } /* end GetClassLoaderClasses */
209
210 // k_mirror - may be primitive, this must be checked
211 // is_modifiable_class_ptr - pre-checked for NULL
212 jvmtiError
213 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
214 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
215 JNI_TRUE : JNI_FALSE;
216 return JVMTI_ERROR_NONE;
217 } /* end IsModifiableClass */
218
219 // class_count - pre-checked to be greater than or equal to 0
220 // classes - pre-checked for NULL
221 jvmtiError
222 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
223 //TODO: add locking
224
225 int index;
226 JavaThread* current_thread = JavaThread::current();
227 ResourceMark rm(current_thread);
228
229 jvmtiClassDefinition* class_definitions =
230 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
231 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
232
233 for (index = 0; index < class_count; index++) {
234 HandleMark hm(current_thread);
235
236 jclass jcls = classes[index];
237 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
238 if (k_mirror == NULL) {
239 return JVMTI_ERROR_INVALID_CLASS;
240 }
241 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
242 return JVMTI_ERROR_INVALID_CLASS;
243 }
244
245 if (java_lang_Class::is_primitive(k_mirror)) {
246 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
247 }
248
249 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
250 KlassHandle klass(current_thread, k_oop);
251
252 jint status = klass->jvmti_class_status();
253 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
254 return JVMTI_ERROR_INVALID_CLASS;
255 }
256 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
257 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
258 }
259
260 instanceKlassHandle ikh(current_thread, k_oop);
261 if (ikh->get_cached_class_file_bytes() == NULL) {
262 // Not cached, we need to reconstitute the class file from the
263 // VM representation. We don't attach the reconstituted class
264 // bytes to the InstanceKlass here because they have not been
265 // validated and we're not at a safepoint.
266 JvmtiClassFileReconstituter reconstituter(ikh);
267 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
268 return reconstituter.get_error();
269 }
270
271 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
272 class_definitions[index].class_bytes = (unsigned char*)
273 reconstituter.class_file_bytes();
274 } else {
275 // it is cached, get it from the cache
276 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
277 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
278 }
279 class_definitions[index].klass = jcls;
280 }
281 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
282 VMThread::execute(&op);
283 return (op.check_error());
284 } /* end RetransformClasses */
285
286
287 // class_count - pre-checked to be greater than or equal to 0
288 // class_definitions - pre-checked for NULL
289 jvmtiError
290 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
291 //TODO: add locking
292 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
293 VMThread::execute(&op);
294 return (op.check_error());
295 } /* end RedefineClasses */
296
297
298 //
299 // Object functions
300 //
301
302 // size_ptr - pre-checked for NULL
303 jvmtiError
304 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
305 oop mirror = JNIHandles::resolve_external_guard(object);
306 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
307
308 if (mirror->klass() == SystemDictionary::Class_klass() &&
309 !java_lang_Class::is_primitive(mirror)) {
310 Klass* k = java_lang_Class::as_Klass(mirror);
311 assert(k != NULL, "class for non-primitive mirror must exist");
312 *size_ptr = (jlong)k->size() * wordSize;
313 } else {
314 *size_ptr = (jlong)mirror->size() * wordSize;
315 }
316 return JVMTI_ERROR_NONE;
317 } /* end GetObjectSize */
318
319 //
320 // Method functions
321 //
322
323 // prefix - NULL is a valid value, must be checked
324 jvmtiError
325 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
326 return prefix == NULL?
327 SetNativeMethodPrefixes(0, NULL) :
328 SetNativeMethodPrefixes(1, (char**)&prefix);
329 } /* end SetNativeMethodPrefix */
330
331
332 // prefix_count - pre-checked to be greater than or equal to 0
333 // prefixes - pre-checked for NULL
334 jvmtiError
335 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
336 // Have to grab JVMTI thread state lock to be sure that some thread
337 // isn't accessing the prefixes at the same time we are setting them.
338 // No locks during VM bring-up.
339 if (Threads::number_of_threads() == 0) {
340 return set_native_method_prefixes(prefix_count, prefixes);
341 } else {
342 MutexLocker mu(JvmtiThreadState_lock);
343 return set_native_method_prefixes(prefix_count, prefixes);
344 }
345 } /* end SetNativeMethodPrefixes */
346
347 //
348 // Event Management functions
349 //
350
351 // callbacks - NULL is a valid value, must be checked
352 // size_of_callbacks - pre-checked to be greater than or equal to 0
353 jvmtiError
354 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
355 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
356 return JVMTI_ERROR_NONE;
357 } /* end SetEventCallbacks */
358
359
360 // event_thread - NULL is a valid value, must be checked
361 jvmtiError
362 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
363 JavaThread* java_thread = NULL;
364 if (event_thread != NULL) {
365 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
366 if (thread_oop == NULL) {
367 return JVMTI_ERROR_INVALID_THREAD;
368 }
369 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
370 return JVMTI_ERROR_INVALID_THREAD;
371 }
372 java_thread = java_lang_Thread::thread(thread_oop);
373 if (java_thread == NULL) {
374 return JVMTI_ERROR_THREAD_NOT_ALIVE;
375 }
376 }
377
378 // event_type must be valid
379 if (!JvmtiEventController::is_valid_event_type(event_type)) {
380 return JVMTI_ERROR_INVALID_EVENT_TYPE;
381 }
382
383 // global events cannot be controlled at thread level.
384 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
385 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
386 }
387
388 bool enabled = (mode == JVMTI_ENABLE);
389
390 // assure that needed capabilities are present
391 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
392 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
393 }
394
395 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
396 record_class_file_load_hook_enabled();
397 }
398 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
399
400 return JVMTI_ERROR_NONE;
401 } /* end SetEventNotificationMode */
402
403 //
404 // Capability functions
405 //
406
407 // capabilities_ptr - pre-checked for NULL
408 jvmtiError
409 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
410 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
411 get_prohibited_capabilities(),
412 capabilities_ptr);
413 return JVMTI_ERROR_NONE;
414 } /* end GetPotentialCapabilities */
415
416
417 // capabilities_ptr - pre-checked for NULL
418 jvmtiError
419 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
420 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
421 get_prohibited_capabilities(),
422 capabilities_ptr,
423 get_capabilities());
424 } /* end AddCapabilities */
425
426
427 // capabilities_ptr - pre-checked for NULL
428 jvmtiError
429 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
430 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
431 return JVMTI_ERROR_NONE;
432 } /* end RelinquishCapabilities */
433
434
435 // capabilities_ptr - pre-checked for NULL
436 jvmtiError
437 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
438 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
439 return JVMTI_ERROR_NONE;
440 } /* end GetCapabilities */
441
442 //
443 // Class Loader Search functions
444 //
445
446 // segment - pre-checked for NULL
447 jvmtiError
448 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
449 jvmtiPhase phase = get_phase();
450 if (phase == JVMTI_PHASE_ONLOAD) {
451 Arguments::append_sysclasspath(segment);
452 return JVMTI_ERROR_NONE;
453 } else if (use_version_1_0_semantics()) {
454 // This JvmtiEnv requested version 1.0 semantics and this function
455 // is only allowed in the ONLOAD phase in version 1.0 so we need to
456 // return an error here.
457 return JVMTI_ERROR_WRONG_PHASE;
458 } else if (phase == JVMTI_PHASE_LIVE) {
459 // The phase is checked by the wrapper that called this function,
460 // but this thread could be racing with the thread that is
461 // terminating the VM so we check one more time.
462
463 // create the zip entry
464 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
465 if (zip_entry == NULL) {
466 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
467 }
468
469 // lock the loader
470 Thread* thread = Thread::current();
471 HandleMark hm;
472 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
473
474 ObjectLocker ol(loader_lock, thread);
475
476 // add the jar file to the bootclasspath
477 log_info(classload)("opened: %s", zip_entry->name());
478 ClassLoaderExt::append_boot_classpath(zip_entry);
479 return JVMTI_ERROR_NONE;
480 } else {
481 return JVMTI_ERROR_WRONG_PHASE;
482 }
483
484 } /* end AddToBootstrapClassLoaderSearch */
485
486
487 // segment - pre-checked for NULL
488 jvmtiError
489 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
490 jvmtiPhase phase = get_phase();
491
492 if (phase == JVMTI_PHASE_ONLOAD) {
493 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
494 if (strcmp("java.class.path", p->key()) == 0) {
495 p->append_value(segment);
496 break;
497 }
498 }
499 return JVMTI_ERROR_NONE;
500 } else if (phase == JVMTI_PHASE_LIVE) {
501 // The phase is checked by the wrapper that called this function,
502 // but this thread could be racing with the thread that is
503 // terminating the VM so we check one more time.
504 HandleMark hm;
505
506 // create the zip entry (which will open the zip file and hence
507 // check that the segment is indeed a zip file).
508 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
509 if (zip_entry == NULL) {
510 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
511 }
512 delete zip_entry; // no longer needed
513
514 // lock the loader
515 Thread* THREAD = Thread::current();
516 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
517
518 ObjectLocker ol(loader, THREAD);
519
520 // need the path as java.lang.String
521 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
522 if (HAS_PENDING_EXCEPTION) {
523 CLEAR_PENDING_EXCEPTION;
524 return JVMTI_ERROR_INTERNAL;
525 }
526
527 instanceKlassHandle loader_ik(THREAD, loader->klass());
528
529 // Invoke the appendToClassPathForInstrumentation method - if the method
530 // is not found it means the loader doesn't support adding to the class path
531 // in the live phase.
532 {
533 JavaValue res(T_VOID);
534 JavaCalls::call_special(&res,
535 loader,
536 loader_ik,
537 vmSymbols::appendToClassPathForInstrumentation_name(),
538 vmSymbols::appendToClassPathForInstrumentation_signature(),
539 path,
540 THREAD);
541 if (HAS_PENDING_EXCEPTION) {
542 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
543 CLEAR_PENDING_EXCEPTION;
544
545 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
546 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
547 } else {
548 return JVMTI_ERROR_INTERNAL;
549 }
550 }
551 }
552
553 return JVMTI_ERROR_NONE;
554 } else {
555 return JVMTI_ERROR_WRONG_PHASE;
556 }
557 } /* end AddToSystemClassLoaderSearch */
558
559 //
560 // General functions
561 //
562
563 // phase_ptr - pre-checked for NULL
564 jvmtiError
565 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
566 *phase_ptr = get_phase();
567 return JVMTI_ERROR_NONE;
568 } /* end GetPhase */
569
570
571 jvmtiError
572 JvmtiEnv::DisposeEnvironment() {
573 dispose();
574 return JVMTI_ERROR_NONE;
575 } /* end DisposeEnvironment */
576
577
578 // data - NULL is a valid value, must be checked
579 jvmtiError
580 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
581 set_env_local_storage(data);
582 return JVMTI_ERROR_NONE;
583 } /* end SetEnvironmentLocalStorage */
584
585
586 // data_ptr - pre-checked for NULL
587 jvmtiError
588 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
589 *data_ptr = (void*)get_env_local_storage();
590 return JVMTI_ERROR_NONE;
591 } /* end GetEnvironmentLocalStorage */
592
593 // version_ptr - pre-checked for NULL
594 jvmtiError
595 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
596 *version_ptr = JVMTI_VERSION;
597 return JVMTI_ERROR_NONE;
598 } /* end GetVersionNumber */
599
600
601 // name_ptr - pre-checked for NULL
602 jvmtiError
603 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
604 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
605 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
606 }
607 const char *name = JvmtiUtil::error_name(error);
608 if (name == NULL) {
609 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
610 }
611 size_t len = strlen(name) + 1;
612 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
613 if (err == JVMTI_ERROR_NONE) {
614 memcpy(*name_ptr, name, len);
615 }
616 return err;
617 } /* end GetErrorName */
618
619
620 jvmtiError
621 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
622 switch (flag) {
623 case JVMTI_VERBOSE_OTHER:
624 // ignore
625 break;
626 case JVMTI_VERBOSE_CLASS:
627 if (value == 0) {
628 LogConfiguration::parse_log_arguments("stdout", "classunload=off", NULL, NULL, NULL);
629 LogConfiguration::parse_log_arguments("stdout", "classload=off", NULL, NULL, NULL);
630 } else {
631 LogConfiguration::parse_log_arguments("stdout", "classload=info", NULL, NULL, NULL);
632 LogConfiguration::parse_log_arguments("stdout", "classunload=info", NULL, NULL, NULL);
633 }
634 break;
635 case JVMTI_VERBOSE_GC:
636 if (value == 0) {
637 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
638 } else {
639 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
640 }
641 break;
642 case JVMTI_VERBOSE_JNI:
643 PrintJNIResolving = value != 0;
644 break;
645 default:
646 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
647 };
648 return JVMTI_ERROR_NONE;
649 } /* end SetVerboseFlag */
650
651
652 // format_ptr - pre-checked for NULL
653 jvmtiError
654 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
655 *format_ptr = JVMTI_JLOCATION_JVMBCI;
656 return JVMTI_ERROR_NONE;
657 } /* end GetJLocationFormat */
658
659 //
660 // Thread functions
661 //
662
663 // Threads_lock NOT held
664 // thread - NOT pre-checked
665 // thread_state_ptr - pre-checked for NULL
666 jvmtiError
667 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
668 jint state;
669 oop thread_oop;
670 JavaThread* thr;
671
672 if (thread == NULL) {
673 thread_oop = JavaThread::current()->threadObj();
674 } else {
675 thread_oop = JNIHandles::resolve_external_guard(thread);
676 }
677
678 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
679 return JVMTI_ERROR_INVALID_THREAD;
680 }
681
682 // get most state bits
683 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
684
685 // add more state bits
686 thr = java_lang_Thread::thread(thread_oop);
687 if (thr != NULL) {
688 JavaThreadState jts = thr->thread_state();
689
690 if (thr->is_being_ext_suspended()) {
691 state |= JVMTI_THREAD_STATE_SUSPENDED;
692 }
693 if (jts == _thread_in_native) {
694 state |= JVMTI_THREAD_STATE_IN_NATIVE;
695 }
696 OSThread* osThread = thr->osthread();
697 if (osThread != NULL && osThread->interrupted()) {
698 state |= JVMTI_THREAD_STATE_INTERRUPTED;
699 }
700 }
701
702 *thread_state_ptr = state;
703 return JVMTI_ERROR_NONE;
704 } /* end GetThreadState */
705
706
707 // thread_ptr - pre-checked for NULL
708 jvmtiError
709 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
710 JavaThread* current_thread = JavaThread::current();
711 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
712 return JVMTI_ERROR_NONE;
713 } /* end GetCurrentThread */
714
715
716 // threads_count_ptr - pre-checked for NULL
717 // threads_ptr - pre-checked for NULL
718 jvmtiError
719 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
720 int nthreads = 0;
721 Handle *thread_objs = NULL;
722 ResourceMark rm;
723 HandleMark hm;
724
725 // enumerate threads (including agent threads)
726 ThreadsListEnumerator tle(Thread::current(), true);
727 nthreads = tle.num_threads();
728 *threads_count_ptr = nthreads;
729
730 if (nthreads == 0) {
731 *threads_ptr = NULL;
732 return JVMTI_ERROR_NONE;
733 }
734
735 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
736 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
737
738 for (int i=0; i < nthreads; i++) {
739 thread_objs[i] = Handle(tle.get_threadObj(i));
740 }
741
742 // have to make global handles outside of Threads_lock
743 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
744 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
745
746 *threads_ptr = jthreads;
747 return JVMTI_ERROR_NONE;
748 } /* end GetAllThreads */
749
750
751 // Threads_lock NOT held, java_thread not protected by lock
752 // java_thread - pre-checked
753 jvmtiError
754 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
755 // don't allow hidden thread suspend request.
756 if (java_thread->is_hidden_from_external_view()) {
757 return (JVMTI_ERROR_NONE);
758 }
759
760 {
761 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
762 if (java_thread->is_external_suspend()) {
763 // don't allow nested external suspend requests.
764 return (JVMTI_ERROR_THREAD_SUSPENDED);
765 }
766 if (java_thread->is_exiting()) { // thread is in the process of exiting
767 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
768 }
769 java_thread->set_external_suspend();
770 }
771
772 if (!JvmtiSuspendControl::suspend(java_thread)) {
773 // the thread was in the process of exiting
774 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
775 }
776 return JVMTI_ERROR_NONE;
777 } /* end SuspendThread */
778
779
780 // request_count - pre-checked to be greater than or equal to 0
781 // request_list - pre-checked for NULL
782 // results - pre-checked for NULL
783 jvmtiError
784 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
785 int needSafepoint = 0; // > 0 if we need a safepoint
786 for (int i = 0; i < request_count; i++) {
787 JavaThread *java_thread = get_JavaThread(request_list[i]);
788 if (java_thread == NULL) {
789 results[i] = JVMTI_ERROR_INVALID_THREAD;
790 continue;
791 }
792 // the thread has not yet run or has exited (not on threads list)
793 if (java_thread->threadObj() == NULL) {
794 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
795 continue;
796 }
797 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
798 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
799 continue;
800 }
801 // don't allow hidden thread suspend request.
802 if (java_thread->is_hidden_from_external_view()) {
803 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
804 continue;
805 }
806
807 {
808 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
809 if (java_thread->is_external_suspend()) {
810 // don't allow nested external suspend requests.
811 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
812 continue;
813 }
814 if (java_thread->is_exiting()) { // thread is in the process of exiting
815 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
816 continue;
817 }
818 java_thread->set_external_suspend();
819 }
820 if (java_thread->thread_state() == _thread_in_native) {
821 // We need to try and suspend native threads here. Threads in
822 // other states will self-suspend on their next transition.
823 if (!JvmtiSuspendControl::suspend(java_thread)) {
824 // The thread was in the process of exiting. Force another
825 // safepoint to make sure that this thread transitions.
826 needSafepoint++;
827 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
828 continue;
829 }
830 } else {
831 needSafepoint++;
832 }
833 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
834 }
835 if (needSafepoint > 0) {
836 VM_ForceSafepoint vfs;
837 VMThread::execute(&vfs);
838 }
839 // per-thread suspend results returned via results parameter
840 return JVMTI_ERROR_NONE;
841 } /* end SuspendThreadList */
842
843
844 // Threads_lock NOT held, java_thread not protected by lock
845 // java_thread - pre-checked
846 jvmtiError
847 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
848 // don't allow hidden thread resume request.
849 if (java_thread->is_hidden_from_external_view()) {
850 return JVMTI_ERROR_NONE;
851 }
852
853 if (!java_thread->is_being_ext_suspended()) {
854 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
855 }
856
857 if (!JvmtiSuspendControl::resume(java_thread)) {
858 return JVMTI_ERROR_INTERNAL;
859 }
860 return JVMTI_ERROR_NONE;
861 } /* end ResumeThread */
862
863
864 // request_count - pre-checked to be greater than or equal to 0
865 // request_list - pre-checked for NULL
866 // results - pre-checked for NULL
867 jvmtiError
868 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
869 for (int i = 0; i < request_count; i++) {
870 JavaThread *java_thread = get_JavaThread(request_list[i]);
871 if (java_thread == NULL) {
872 results[i] = JVMTI_ERROR_INVALID_THREAD;
873 continue;
874 }
875 // don't allow hidden thread resume request.
876 if (java_thread->is_hidden_from_external_view()) {
877 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
878 continue;
879 }
880 if (!java_thread->is_being_ext_suspended()) {
881 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
882 continue;
883 }
884
885 if (!JvmtiSuspendControl::resume(java_thread)) {
886 results[i] = JVMTI_ERROR_INTERNAL;
887 continue;
888 }
889
890 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
891 }
892 // per-thread resume results returned via results parameter
893 return JVMTI_ERROR_NONE;
894 } /* end ResumeThreadList */
895
896
897 // Threads_lock NOT held, java_thread not protected by lock
898 // java_thread - pre-checked
899 jvmtiError
900 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
901 oop e = JNIHandles::resolve_external_guard(exception);
902 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
903
904 JavaThread::send_async_exception(java_thread->threadObj(), e);
905
906 return JVMTI_ERROR_NONE;
907
908 } /* end StopThread */
909
910
911 // Threads_lock NOT held
912 // thread - NOT pre-checked
913 jvmtiError
914 JvmtiEnv::InterruptThread(jthread thread) {
915 oop thread_oop = JNIHandles::resolve_external_guard(thread);
916 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
917 return JVMTI_ERROR_INVALID_THREAD;
918
919 JavaThread* current_thread = JavaThread::current();
920
921 // Todo: this is a duplicate of JVM_Interrupt; share code in future
922 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
923 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
924 // We need to re-resolve the java_thread, since a GC might have happened during the
925 // acquire of the lock
926
927 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
928 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
929
930 Thread::interrupt(java_thread);
931
932 return JVMTI_ERROR_NONE;
933 } /* end InterruptThread */
934
935
936 // Threads_lock NOT held
937 // thread - NOT pre-checked
938 // info_ptr - pre-checked for NULL
939 jvmtiError
940 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
941 ResourceMark rm;
942 HandleMark hm;
943
944 JavaThread* current_thread = JavaThread::current();
945
946 // if thread is NULL the current thread is used
947 oop thread_oop;
948 if (thread == NULL) {
949 thread_oop = current_thread->threadObj();
950 } else {
951 thread_oop = JNIHandles::resolve_external_guard(thread);
952 }
953 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
954 return JVMTI_ERROR_INVALID_THREAD;
955
956 Handle thread_obj(current_thread, thread_oop);
957 Handle name;
958 ThreadPriority priority;
959 Handle thread_group;
960 Handle context_class_loader;
961 bool is_daemon;
962
963 { MutexLocker mu(Threads_lock);
964
965 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
966 priority = java_lang_Thread::priority(thread_obj());
967 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
968 is_daemon = java_lang_Thread::is_daemon(thread_obj());
969
970 oop loader = java_lang_Thread::context_class_loader(thread_obj());
971 context_class_loader = Handle(current_thread, loader);
972 }
973 { const char *n;
974
975 if (name() != NULL) {
976 n = java_lang_String::as_utf8_string(name());
977 } else {
978 n = UNICODE::as_utf8((jchar*) NULL, 0);
979 }
980
981 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
982 if (info_ptr->name == NULL)
983 return JVMTI_ERROR_OUT_OF_MEMORY;
984
985 strcpy(info_ptr->name, n);
986 }
987 info_ptr->is_daemon = is_daemon;
988 info_ptr->priority = priority;
989
990 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
991 jni_reference(context_class_loader);
992 info_ptr->thread_group = jni_reference(thread_group);
993
994 return JVMTI_ERROR_NONE;
995 } /* end GetThreadInfo */
996
997
998 // Threads_lock NOT held, java_thread not protected by lock
999 // java_thread - pre-checked
1000 // owned_monitor_count_ptr - pre-checked for NULL
1001 // owned_monitors_ptr - pre-checked for NULL
1002 jvmtiError
1003 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1004 jvmtiError err = JVMTI_ERROR_NONE;
1005 JavaThread* calling_thread = JavaThread::current();
1006
1007 // growable array of jvmti monitors info on the C-heap
1008 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1009 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1010
1011 // It is only safe to perform the direct operation on the current
1012 // thread. All other usage needs to use a vm-safepoint-op for safety.
1013 if (java_thread == calling_thread) {
1014 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1015 } else {
1016 // JVMTI get monitors info at safepoint. Do not require target thread to
1017 // be suspended.
1018 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1019 VMThread::execute(&op);
1020 err = op.result();
1021 }
1022 jint owned_monitor_count = owned_monitors_list->length();
1023 if (err == JVMTI_ERROR_NONE) {
1024 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1025 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1026 // copy into the returned array
1027 for (int i = 0; i < owned_monitor_count; i++) {
1028 (*owned_monitors_ptr)[i] =
1029 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1030 }
1031 *owned_monitor_count_ptr = owned_monitor_count;
1032 }
1033 }
1034 // clean up.
1035 for (int i = 0; i < owned_monitor_count; i++) {
1036 deallocate((unsigned char*)owned_monitors_list->at(i));
1037 }
1038 delete owned_monitors_list;
1039
1040 return err;
1041 } /* end GetOwnedMonitorInfo */
1042
1043
1044 // Threads_lock NOT held, java_thread not protected by lock
1045 // java_thread - pre-checked
1046 // monitor_info_count_ptr - pre-checked for NULL
1047 // monitor_info_ptr - pre-checked for NULL
1048 jvmtiError
1049 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1050 jvmtiError err = JVMTI_ERROR_NONE;
1051 JavaThread* calling_thread = JavaThread::current();
1052
1053 // growable array of jvmti monitors info on the C-heap
1054 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1055 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1056
1057 // It is only safe to perform the direct operation on the current
1058 // thread. All other usage needs to use a vm-safepoint-op for safety.
1059 if (java_thread == calling_thread) {
1060 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1061 } else {
1062 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1063 // be suspended.
1064 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1065 VMThread::execute(&op);
1066 err = op.result();
1067 }
1068
1069 jint owned_monitor_count = owned_monitors_list->length();
1070 if (err == JVMTI_ERROR_NONE) {
1071 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1072 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1073 // copy to output array.
1074 for (int i = 0; i < owned_monitor_count; i++) {
1075 (*monitor_info_ptr)[i].monitor =
1076 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1077 (*monitor_info_ptr)[i].stack_depth =
1078 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1079 }
1080 }
1081 *monitor_info_count_ptr = owned_monitor_count;
1082 }
1083
1084 // clean up.
1085 for (int i = 0; i < owned_monitor_count; i++) {
1086 deallocate((unsigned char*)owned_monitors_list->at(i));
1087 }
1088 delete owned_monitors_list;
1089
1090 return err;
1091 } /* end GetOwnedMonitorStackDepthInfo */
1092
1093
1094 // Threads_lock NOT held, java_thread not protected by lock
1095 // java_thread - pre-checked
1096 // monitor_ptr - pre-checked for NULL
1097 jvmtiError
1098 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1099 jvmtiError err = JVMTI_ERROR_NONE;
1100 JavaThread* calling_thread = JavaThread::current();
1101
1102 // It is only safe to perform the direct operation on the current
1103 // thread. All other usage needs to use a vm-safepoint-op for safety.
1104 if (java_thread == calling_thread) {
1105 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1106 } else {
1107 // get contended monitor information at safepoint.
1108 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1109 VMThread::execute(&op);
1110 err = op.result();
1111 }
1112 return err;
1113 } /* end GetCurrentContendedMonitor */
1114
1115
1116 // Threads_lock NOT held
1117 // thread - NOT pre-checked
1118 // proc - pre-checked for NULL
1119 // arg - NULL is a valid value, must be checked
1120 jvmtiError
1121 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1122 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1123 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1124 return JVMTI_ERROR_INVALID_THREAD;
1125 }
1126 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1127 return JVMTI_ERROR_INVALID_PRIORITY;
1128 }
1129
1130 //Thread-self
1131 JavaThread* current_thread = JavaThread::current();
1132
1133 Handle thread_hndl(current_thread, thread_oop);
1134 {
1135 MutexLocker mu(Threads_lock); // grab Threads_lock
1136
1137 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1138
1139 // At this point it may be possible that no osthread was created for the
1140 // JavaThread due to lack of memory.
1141 if (new_thread == NULL || new_thread->osthread() == NULL) {
1142 if (new_thread) delete new_thread;
1143 return JVMTI_ERROR_OUT_OF_MEMORY;
1144 }
1145
1146 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1147 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1148 java_lang_Thread::set_daemon(thread_hndl());
1149
1150 new_thread->set_threadObj(thread_hndl());
1151 Threads::add(new_thread);
1152 Thread::start(new_thread);
1153 } // unlock Threads_lock
1154
1155 return JVMTI_ERROR_NONE;
1156 } /* end RunAgentThread */
1157
1158 //
1159 // Thread Group functions
1160 //
1161
1162 // group_count_ptr - pre-checked for NULL
1163 // groups_ptr - pre-checked for NULL
1164 jvmtiError
1165 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1166 JavaThread* current_thread = JavaThread::current();
1167
1168 // Only one top level thread group now.
1169 *group_count_ptr = 1;
1170
1171 // Allocate memory to store global-refs to the thread groups.
1172 // Assume this area is freed by caller.
1173 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1174
1175 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1176
1177 // Convert oop to Handle, then convert Handle to global-ref.
1178 {
1179 HandleMark hm(current_thread);
1180 Handle system_thread_group(current_thread, Universe::system_thread_group());
1181 *groups_ptr[0] = jni_reference(system_thread_group);
1182 }
1183
1184 return JVMTI_ERROR_NONE;
1185 } /* end GetTopThreadGroups */
1186
1187
1188 // info_ptr - pre-checked for NULL
1189 jvmtiError
1190 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1191 ResourceMark rm;
1192 HandleMark hm;
1193
1194 JavaThread* current_thread = JavaThread::current();
1195
1196 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1197 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1198
1199 const char* name;
1200 Handle parent_group;
1201 bool is_daemon;
1202 ThreadPriority max_priority;
1203
1204 { MutexLocker mu(Threads_lock);
1205
1206 name = java_lang_ThreadGroup::name(group_obj());
1207 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1208 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1209 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1210 }
1211
1212 info_ptr->is_daemon = is_daemon;
1213 info_ptr->max_priority = max_priority;
1214 info_ptr->parent = jni_reference(parent_group);
1215
1216 if (name != NULL) {
1217 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1218 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1219 strcpy(info_ptr->name, name);
1220 } else {
1221 info_ptr->name = NULL;
1222 }
1223
1224 return JVMTI_ERROR_NONE;
1225 } /* end GetThreadGroupInfo */
1226
1227
1228 // thread_count_ptr - pre-checked for NULL
1229 // threads_ptr - pre-checked for NULL
1230 // group_count_ptr - pre-checked for NULL
1231 // groups_ptr - pre-checked for NULL
1232 jvmtiError
1233 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1234 JavaThread* current_thread = JavaThread::current();
1235 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1236 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1237
1238 Handle *thread_objs = NULL;
1239 Handle *group_objs = NULL;
1240 int nthreads = 0;
1241 int ngroups = 0;
1242 int hidden_threads = 0;
1243
1244 ResourceMark rm;
1245 HandleMark hm;
1246
1247 Handle group_hdl(current_thread, group_obj);
1248
1249 { MutexLocker mu(Threads_lock);
1250
1251 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1252 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1253
1254 if (nthreads > 0) {
1255 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1256 assert(nthreads <= threads->length(), "too many threads");
1257 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1258 for (int i=0, j=0; i<nthreads; i++) {
1259 oop thread_obj = threads->obj_at(i);
1260 assert(thread_obj != NULL, "thread_obj is NULL");
1261 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1262 // Filter out hidden java threads.
1263 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1264 hidden_threads++;
1265 continue;
1266 }
1267 thread_objs[j++] = Handle(current_thread, thread_obj);
1268 }
1269 nthreads -= hidden_threads;
1270 }
1271 if (ngroups > 0) {
1272 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1273 assert(ngroups <= groups->length(), "too many threads");
1274 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1275 for (int i=0; i<ngroups; i++) {
1276 oop group_obj = groups->obj_at(i);
1277 assert(group_obj != NULL, "group_obj != NULL");
1278 group_objs[i] = Handle(current_thread, group_obj);
1279 }
1280 }
1281 }
1282
1283 // have to make global handles outside of Threads_lock
1284 *group_count_ptr = ngroups;
1285 *thread_count_ptr = nthreads;
1286 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1287 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1288 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1289 return JVMTI_ERROR_OUT_OF_MEMORY;
1290 }
1291 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1292 return JVMTI_ERROR_OUT_OF_MEMORY;
1293 }
1294
1295 return JVMTI_ERROR_NONE;
1296 } /* end GetThreadGroupChildren */
1297
1298
1299 //
1300 // Stack Frame functions
1301 //
1302
1303 // Threads_lock NOT held, java_thread not protected by lock
1304 // java_thread - pre-checked
1305 // max_frame_count - pre-checked to be greater than or equal to 0
1306 // frame_buffer - pre-checked for NULL
1307 // count_ptr - pre-checked for NULL
1308 jvmtiError
1309 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1310 jvmtiError err = JVMTI_ERROR_NONE;
1311
1312 // It is only safe to perform the direct operation on the current
1313 // thread. All other usage needs to use a vm-safepoint-op for safety.
1314 if (java_thread == JavaThread::current()) {
1315 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1316 } else {
1317 // JVMTI get stack trace at safepoint. Do not require target thread to
1318 // be suspended.
1319 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1320 VMThread::execute(&op);
1321 err = op.result();
1322 }
1323
1324 return err;
1325 } /* end GetStackTrace */
1326
1327
1328 // max_frame_count - pre-checked to be greater than or equal to 0
1329 // stack_info_ptr - pre-checked for NULL
1330 // thread_count_ptr - pre-checked for NULL
1331 jvmtiError
1332 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1333 jvmtiError err = JVMTI_ERROR_NONE;
1334 JavaThread* calling_thread = JavaThread::current();
1335
1336 // JVMTI get stack traces at safepoint.
1337 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1338 VMThread::execute(&op);
1339 *thread_count_ptr = op.final_thread_count();
1340 *stack_info_ptr = op.stack_info();
1341 err = op.result();
1342 return err;
1343 } /* end GetAllStackTraces */
1344
1345
1346 // thread_count - pre-checked to be greater than or equal to 0
1347 // thread_list - pre-checked for NULL
1348 // max_frame_count - pre-checked to be greater than or equal to 0
1349 // stack_info_ptr - pre-checked for NULL
1350 jvmtiError
1351 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1352 jvmtiError err = JVMTI_ERROR_NONE;
1353 // JVMTI get stack traces at safepoint.
1354 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1355 VMThread::execute(&op);
1356 err = op.result();
1357 if (err == JVMTI_ERROR_NONE) {
1358 *stack_info_ptr = op.stack_info();
1359 }
1360 return err;
1361 } /* end GetThreadListStackTraces */
1362
1363
1364 // Threads_lock NOT held, java_thread not protected by lock
1365 // java_thread - pre-checked
1366 // count_ptr - pre-checked for NULL
1367 jvmtiError
1368 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1369 jvmtiError err = JVMTI_ERROR_NONE;
1370
1371 // retrieve or create JvmtiThreadState.
1372 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1373 if (state == NULL) {
1374 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1375 }
1376
1377 // It is only safe to perform the direct operation on the current
1378 // thread. All other usage needs to use a vm-safepoint-op for safety.
1379 if (java_thread == JavaThread::current()) {
1380 err = get_frame_count(state, count_ptr);
1381 } else {
1382 // get java stack frame count at safepoint.
1383 VM_GetFrameCount op(this, state, count_ptr);
1384 VMThread::execute(&op);
1385 err = op.result();
1386 }
1387 return err;
1388 } /* end GetFrameCount */
1389
1390
1391 // Threads_lock NOT held, java_thread not protected by lock
1392 // java_thread - pre-checked
1393 jvmtiError
1394 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1395 JavaThread* current_thread = JavaThread::current();
1396 HandleMark hm(current_thread);
1397 uint32_t debug_bits = 0;
1398
1399 // retrieve or create the state
1400 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1401 if (state == NULL) {
1402 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1403 }
1404
1405 // Check if java_thread is fully suspended
1406 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1407 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1408 }
1409 // Check to see if a PopFrame was already in progress
1410 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1411 // Probably possible for JVMTI clients to trigger this, but the
1412 // JPDA backend shouldn't allow this to happen
1413 return JVMTI_ERROR_INTERNAL;
1414 }
1415
1416 {
1417 // Was workaround bug
1418 // 4812902: popFrame hangs if the method is waiting at a synchronize
1419 // Catch this condition and return an error to avoid hanging.
1420 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1421 OSThread* osThread = java_thread->osthread();
1422 if (osThread->get_state() == MONITOR_WAIT) {
1423 return JVMTI_ERROR_OPAQUE_FRAME;
1424 }
1425 }
1426
1427 {
1428 ResourceMark rm(current_thread);
1429 // Check if there are more than one Java frame in this thread, that the top two frames
1430 // are Java (not native) frames, and that there is no intervening VM frame
1431 int frame_count = 0;
1432 bool is_interpreted[2];
1433 intptr_t *frame_sp[2];
1434 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1435 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1436 methodHandle mh(current_thread, vfs.method());
1437 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1438 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1439 frame_sp[frame_count] = vfs.frame_id();
1440 if (++frame_count > 1) break;
1441 }
1442 if (frame_count < 2) {
1443 // We haven't found two adjacent non-native Java frames on the top.
1444 // There can be two situations here:
1445 // 1. There are no more java frames
1446 // 2. Two top java frames are separated by non-java native frames
1447 if(vframeFor(java_thread, 1) == NULL) {
1448 return JVMTI_ERROR_NO_MORE_FRAMES;
1449 } else {
1450 // Intervening non-java native or VM frames separate java frames.
1451 // Current implementation does not support this. See bug #5031735.
1452 // In theory it is possible to pop frames in such cases.
1453 return JVMTI_ERROR_OPAQUE_FRAME;
1454 }
1455 }
1456
1457 // If any of the top 2 frames is a compiled one, need to deoptimize it
1458 for (int i = 0; i < 2; i++) {
1459 if (!is_interpreted[i]) {
1460 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1461 }
1462 }
1463
1464 // Update the thread state to reflect that the top frame is popped
1465 // so that cur_stack_depth is maintained properly and all frameIDs
1466 // are invalidated.
1467 // The current frame will be popped later when the suspended thread
1468 // is resumed and right before returning from VM to Java.
1469 // (see call_VM_base() in assembler_<cpu>.cpp).
1470
1471 // It's fine to update the thread state here because no JVMTI events
1472 // shall be posted for this PopFrame.
1473
1474 // It is only safe to perform the direct operation on the current
1475 // thread. All other usage needs to use a vm-safepoint-op for safety.
1476 if (java_thread == JavaThread::current()) {
1477 state->update_for_pop_top_frame();
1478 } else {
1479 VM_UpdateForPopTopFrame op(state);
1480 VMThread::execute(&op);
1481 jvmtiError err = op.result();
1482 if (err != JVMTI_ERROR_NONE) {
1483 return err;
1484 }
1485 }
1486
1487 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1488 // Set pending step flag for this popframe and it is cleared when next
1489 // step event is posted.
1490 state->set_pending_step_for_popframe();
1491 }
1492
1493 return JVMTI_ERROR_NONE;
1494 } /* end PopFrame */
1495
1496
1497 // Threads_lock NOT held, java_thread not protected by lock
1498 // java_thread - pre-checked
1499 // java_thread - unchecked
1500 // depth - pre-checked as non-negative
1501 // method_ptr - pre-checked for NULL
1502 // location_ptr - pre-checked for NULL
1503 jvmtiError
1504 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1505 jvmtiError err = JVMTI_ERROR_NONE;
1506
1507 // It is only safe to perform the direct operation on the current
1508 // thread. All other usage needs to use a vm-safepoint-op for safety.
1509 if (java_thread == JavaThread::current()) {
1510 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1511 } else {
1512 // JVMTI get java stack frame location at safepoint.
1513 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1514 VMThread::execute(&op);
1515 err = op.result();
1516 }
1517 return err;
1518 } /* end GetFrameLocation */
1519
1520
1521 // Threads_lock NOT held, java_thread not protected by lock
1522 // java_thread - pre-checked
1523 // java_thread - unchecked
1524 // depth - pre-checked as non-negative
1525 jvmtiError
1526 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1527 jvmtiError err = JVMTI_ERROR_NONE;
1528 ResourceMark rm;
1529 uint32_t debug_bits = 0;
1530
1531 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1532 if (state == NULL) {
1533 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1534 }
1535
1536 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1537 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1538 }
1539
1540 if (TraceJVMTICalls) {
1541 JvmtiSuspendControl::print();
1542 }
1543
1544 vframe *vf = vframeFor(java_thread, depth);
1545 if (vf == NULL) {
1546 return JVMTI_ERROR_NO_MORE_FRAMES;
1547 }
1548
1549 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1550 return JVMTI_ERROR_OPAQUE_FRAME;
1551 }
1552
1553 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1554
1555 // It is only safe to perform the direct operation on the current
1556 // thread. All other usage needs to use a vm-safepoint-op for safety.
1557 if (java_thread == JavaThread::current()) {
1558 int frame_number = state->count_frames() - depth;
1559 state->env_thread_state(this)->set_frame_pop(frame_number);
1560 } else {
1561 VM_SetFramePop op(this, state, depth);
1562 VMThread::execute(&op);
1563 err = op.result();
1564 }
1565 return err;
1566 } /* end NotifyFramePop */
1567
1568
1569 //
1570 // Force Early Return functions
1571 //
1572
1573 // Threads_lock NOT held, java_thread not protected by lock
1574 // java_thread - pre-checked
1575 jvmtiError
1576 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1577 jvalue val;
1578 val.l = value;
1579 return force_early_return(java_thread, val, atos);
1580 } /* end ForceEarlyReturnObject */
1581
1582
1583 // Threads_lock NOT held, java_thread not protected by lock
1584 // java_thread - pre-checked
1585 jvmtiError
1586 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1587 jvalue val;
1588 val.i = value;
1589 return force_early_return(java_thread, val, itos);
1590 } /* end ForceEarlyReturnInt */
1591
1592
1593 // Threads_lock NOT held, java_thread not protected by lock
1594 // java_thread - pre-checked
1595 jvmtiError
1596 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1597 jvalue val;
1598 val.j = value;
1599 return force_early_return(java_thread, val, ltos);
1600 } /* end ForceEarlyReturnLong */
1601
1602
1603 // Threads_lock NOT held, java_thread not protected by lock
1604 // java_thread - pre-checked
1605 jvmtiError
1606 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1607 jvalue val;
1608 val.f = value;
1609 return force_early_return(java_thread, val, ftos);
1610 } /* end ForceEarlyReturnFloat */
1611
1612
1613 // Threads_lock NOT held, java_thread not protected by lock
1614 // java_thread - pre-checked
1615 jvmtiError
1616 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1617 jvalue val;
1618 val.d = value;
1619 return force_early_return(java_thread, val, dtos);
1620 } /* end ForceEarlyReturnDouble */
1621
1622
1623 // Threads_lock NOT held, java_thread not protected by lock
1624 // java_thread - pre-checked
1625 jvmtiError
1626 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1627 jvalue val;
1628 val.j = 0L;
1629 return force_early_return(java_thread, val, vtos);
1630 } /* end ForceEarlyReturnVoid */
1631
1632
1633 //
1634 // Heap functions
1635 //
1636
1637 // klass - NULL is a valid value, must be checked
1638 // initial_object - NULL is a valid value, must be checked
1639 // callbacks - pre-checked for NULL
1640 // user_data - NULL is a valid value, must be checked
1641 jvmtiError
1642 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1643 // check klass if provided
1644 Klass* k_oop = NULL;
1645 if (klass != NULL) {
1646 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1647 if (k_mirror == NULL) {
1648 return JVMTI_ERROR_INVALID_CLASS;
1649 }
1650 if (java_lang_Class::is_primitive(k_mirror)) {
1651 return JVMTI_ERROR_NONE;
1652 }
1653 k_oop = java_lang_Class::as_Klass(k_mirror);
1654 if (k_oop == NULL) {
1655 return JVMTI_ERROR_INVALID_CLASS;
1656 }
1657 }
1658
1659 Thread *thread = Thread::current();
1660 HandleMark hm(thread);
1661 KlassHandle kh (thread, k_oop);
1662
1663 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1664 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1665 return JVMTI_ERROR_NONE;
1666 } /* end FollowReferences */
1667
1668
1669 // klass - NULL is a valid value, must be checked
1670 // callbacks - pre-checked for NULL
1671 // user_data - NULL is a valid value, must be checked
1672 jvmtiError
1673 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1674 // check klass if provided
1675 Klass* k_oop = NULL;
1676 if (klass != NULL) {
1677 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1678 if (k_mirror == NULL) {
1679 return JVMTI_ERROR_INVALID_CLASS;
1680 }
1681 if (java_lang_Class::is_primitive(k_mirror)) {
1682 return JVMTI_ERROR_NONE;
1683 }
1684 k_oop = java_lang_Class::as_Klass(k_mirror);
1685 if (k_oop == NULL) {
1686 return JVMTI_ERROR_INVALID_CLASS;
1687 }
1688 }
1689
1690 Thread *thread = Thread::current();
1691 HandleMark hm(thread);
1692 KlassHandle kh (thread, k_oop);
1693
1694 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1695 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1696 return JVMTI_ERROR_NONE;
1697 } /* end IterateThroughHeap */
1698
1699
1700 // tag_ptr - pre-checked for NULL
1701 jvmtiError
1702 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1703 oop o = JNIHandles::resolve_external_guard(object);
1704 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1705 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1706 return JVMTI_ERROR_NONE;
1707 } /* end GetTag */
1708
1709
1710 jvmtiError
1711 JvmtiEnv::SetTag(jobject object, jlong tag) {
1712 oop o = JNIHandles::resolve_external_guard(object);
1713 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1714 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1715 return JVMTI_ERROR_NONE;
1716 } /* end SetTag */
1717
1718
1719 // tag_count - pre-checked to be greater than or equal to 0
1720 // tags - pre-checked for NULL
1721 // count_ptr - pre-checked for NULL
1722 // object_result_ptr - NULL is a valid value, must be checked
1723 // tag_result_ptr - NULL is a valid value, must be checked
1724 jvmtiError
1725 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1726 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1727 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1728 } /* end GetObjectsWithTags */
1729
1730
1731 jvmtiError
1732 JvmtiEnv::ForceGarbageCollection() {
1733 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1734 return JVMTI_ERROR_NONE;
1735 } /* end ForceGarbageCollection */
1736
1737
1738 //
1739 // Heap (1.0) functions
1740 //
1741
1742 // object_reference_callback - pre-checked for NULL
1743 // user_data - NULL is a valid value, must be checked
1744 jvmtiError
1745 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1746 oop o = JNIHandles::resolve_external_guard(object);
1747 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1748 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1749 return JVMTI_ERROR_NONE;
1750 } /* end IterateOverObjectsReachableFromObject */
1751
1752
1753 // heap_root_callback - NULL is a valid value, must be checked
1754 // stack_ref_callback - NULL is a valid value, must be checked
1755 // object_ref_callback - NULL is a valid value, must be checked
1756 // user_data - NULL is a valid value, must be checked
1757 jvmtiError
1758 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1759 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1760 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1761 return JVMTI_ERROR_NONE;
1762 } /* end IterateOverReachableObjects */
1763
1764
1765 // heap_object_callback - pre-checked for NULL
1766 // user_data - NULL is a valid value, must be checked
1767 jvmtiError
1768 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1769 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1770 Thread *thread = Thread::current();
1771 HandleMark hm(thread);
1772 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1773 return JVMTI_ERROR_NONE;
1774 } /* end IterateOverHeap */
1775
1776
1777 // k_mirror - may be primitive, this must be checked
1778 // heap_object_callback - pre-checked for NULL
1779 // user_data - NULL is a valid value, must be checked
1780 jvmtiError
1781 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1782 if (java_lang_Class::is_primitive(k_mirror)) {
1783 // DO PRIMITIVE CLASS PROCESSING
1784 return JVMTI_ERROR_NONE;
1785 }
1786 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1787 if (k_oop == NULL) {
1788 return JVMTI_ERROR_INVALID_CLASS;
1789 }
1790 Thread *thread = Thread::current();
1791 HandleMark hm(thread);
1792 KlassHandle klass (thread, k_oop);
1793 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1794 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1795 return JVMTI_ERROR_NONE;
1796 } /* end IterateOverInstancesOfClass */
1797
1798
1799 //
1800 // Local Variable functions
1801 //
1802
1803 // Threads_lock NOT held, java_thread not protected by lock
1804 // java_thread - pre-checked
1805 // java_thread - unchecked
1806 // depth - pre-checked as non-negative
1807 // value_ptr - pre-checked for NULL
1808 jvmtiError
1809 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1810 JavaThread* current_thread = JavaThread::current();
1811 // rm object is created to clean up the javaVFrame created in
1812 // doit_prologue(), but after doit() is finished with it.
1813 ResourceMark rm(current_thread);
1814
1815 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1816 VMThread::execute(&op);
1817 jvmtiError err = op.result();
1818 if (err != JVMTI_ERROR_NONE) {
1819 return err;
1820 } else {
1821 *value_ptr = op.value().l;
1822 return JVMTI_ERROR_NONE;
1823 }
1824 } /* end GetLocalObject */
1825
1826 // Threads_lock NOT held, java_thread not protected by lock
1827 // java_thread - pre-checked
1828 // java_thread - unchecked
1829 // depth - pre-checked as non-negative
1830 // value - pre-checked for NULL
1831 jvmtiError
1832 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1833 JavaThread* current_thread = JavaThread::current();
1834 // rm object is created to clean up the javaVFrame created in
1835 // doit_prologue(), but after doit() is finished with it.
1836 ResourceMark rm(current_thread);
1837
1838 VM_GetReceiver op(java_thread, current_thread, depth);
1839 VMThread::execute(&op);
1840 jvmtiError err = op.result();
1841 if (err != JVMTI_ERROR_NONE) {
1842 return err;
1843 } else {
1844 *value_ptr = op.value().l;
1845 return JVMTI_ERROR_NONE;
1846 }
1847 } /* end GetLocalInstance */
1848
1849
1850 // Threads_lock NOT held, java_thread not protected by lock
1851 // java_thread - pre-checked
1852 // java_thread - unchecked
1853 // depth - pre-checked as non-negative
1854 // value_ptr - pre-checked for NULL
1855 jvmtiError
1856 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1857 // rm object is created to clean up the javaVFrame created in
1858 // doit_prologue(), but after doit() is finished with it.
1859 ResourceMark rm;
1860
1861 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1862 VMThread::execute(&op);
1863 *value_ptr = op.value().i;
1864 return op.result();
1865 } /* end GetLocalInt */
1866
1867
1868 // Threads_lock NOT held, java_thread not protected by lock
1869 // java_thread - pre-checked
1870 // java_thread - unchecked
1871 // depth - pre-checked as non-negative
1872 // value_ptr - pre-checked for NULL
1873 jvmtiError
1874 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1875 // rm object is created to clean up the javaVFrame created in
1876 // doit_prologue(), but after doit() is finished with it.
1877 ResourceMark rm;
1878
1879 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1880 VMThread::execute(&op);
1881 *value_ptr = op.value().j;
1882 return op.result();
1883 } /* end GetLocalLong */
1884
1885
1886 // Threads_lock NOT held, java_thread not protected by lock
1887 // java_thread - pre-checked
1888 // java_thread - unchecked
1889 // depth - pre-checked as non-negative
1890 // value_ptr - pre-checked for NULL
1891 jvmtiError
1892 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1893 // rm object is created to clean up the javaVFrame created in
1894 // doit_prologue(), but after doit() is finished with it.
1895 ResourceMark rm;
1896
1897 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1898 VMThread::execute(&op);
1899 *value_ptr = op.value().f;
1900 return op.result();
1901 } /* end GetLocalFloat */
1902
1903
1904 // Threads_lock NOT held, java_thread not protected by lock
1905 // java_thread - pre-checked
1906 // java_thread - unchecked
1907 // depth - pre-checked as non-negative
1908 // value_ptr - pre-checked for NULL
1909 jvmtiError
1910 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1911 // rm object is created to clean up the javaVFrame created in
1912 // doit_prologue(), but after doit() is finished with it.
1913 ResourceMark rm;
1914
1915 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1916 VMThread::execute(&op);
1917 *value_ptr = op.value().d;
1918 return op.result();
1919 } /* end GetLocalDouble */
1920
1921
1922 // Threads_lock NOT held, java_thread not protected by lock
1923 // java_thread - pre-checked
1924 // java_thread - unchecked
1925 // depth - pre-checked as non-negative
1926 jvmtiError
1927 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1928 // rm object is created to clean up the javaVFrame created in
1929 // doit_prologue(), but after doit() is finished with it.
1930 ResourceMark rm;
1931 jvalue val;
1932 val.l = value;
1933 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1934 VMThread::execute(&op);
1935 return op.result();
1936 } /* end SetLocalObject */
1937
1938
1939 // Threads_lock NOT held, java_thread not protected by lock
1940 // java_thread - pre-checked
1941 // java_thread - unchecked
1942 // depth - pre-checked as non-negative
1943 jvmtiError
1944 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1945 // rm object is created to clean up the javaVFrame created in
1946 // doit_prologue(), but after doit() is finished with it.
1947 ResourceMark rm;
1948 jvalue val;
1949 val.i = value;
1950 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1951 VMThread::execute(&op);
1952 return op.result();
1953 } /* end SetLocalInt */
1954
1955
1956 // Threads_lock NOT held, java_thread not protected by lock
1957 // java_thread - pre-checked
1958 // java_thread - unchecked
1959 // depth - pre-checked as non-negative
1960 jvmtiError
1961 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1962 // rm object is created to clean up the javaVFrame created in
1963 // doit_prologue(), but after doit() is finished with it.
1964 ResourceMark rm;
1965 jvalue val;
1966 val.j = value;
1967 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1968 VMThread::execute(&op);
1969 return op.result();
1970 } /* end SetLocalLong */
1971
1972
1973 // Threads_lock NOT held, java_thread not protected by lock
1974 // java_thread - pre-checked
1975 // java_thread - unchecked
1976 // depth - pre-checked as non-negative
1977 jvmtiError
1978 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1979 // rm object is created to clean up the javaVFrame created in
1980 // doit_prologue(), but after doit() is finished with it.
1981 ResourceMark rm;
1982 jvalue val;
1983 val.f = value;
1984 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1985 VMThread::execute(&op);
1986 return op.result();
1987 } /* end SetLocalFloat */
1988
1989
1990 // Threads_lock NOT held, java_thread not protected by lock
1991 // java_thread - pre-checked
1992 // java_thread - unchecked
1993 // depth - pre-checked as non-negative
1994 jvmtiError
1995 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1996 // rm object is created to clean up the javaVFrame created in
1997 // doit_prologue(), but after doit() is finished with it.
1998 ResourceMark rm;
1999 jvalue val;
2000 val.d = value;
2001 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2002 VMThread::execute(&op);
2003 return op.result();
2004 } /* end SetLocalDouble */
2005
2006
2007 //
2008 // Breakpoint functions
2009 //
2010
2011 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2012 jvmtiError
2013 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2014 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2015 if (location < 0) { // simple invalid location check first
2016 return JVMTI_ERROR_INVALID_LOCATION;
2017 }
2018 // verify that the breakpoint is not past the end of the method
2019 if (location >= (jlocation) method_oop->code_size()) {
2020 return JVMTI_ERROR_INVALID_LOCATION;
2021 }
2022
2023 ResourceMark rm;
2024 JvmtiBreakpoint bp(method_oop, location);
2025 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2026 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2027 return JVMTI_ERROR_DUPLICATE;
2028
2029 if (TraceJVMTICalls) {
2030 jvmti_breakpoints.print();
2031 }
2032
2033 return JVMTI_ERROR_NONE;
2034 } /* end SetBreakpoint */
2035
2036
2037 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2038 jvmtiError
2039 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2040 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2041
2042 if (location < 0) { // simple invalid location check first
2043 return JVMTI_ERROR_INVALID_LOCATION;
2044 }
2045
2046 // verify that the breakpoint is not past the end of the method
2047 if (location >= (jlocation) method_oop->code_size()) {
2048 return JVMTI_ERROR_INVALID_LOCATION;
2049 }
2050
2051 JvmtiBreakpoint bp(method_oop, location);
2052
2053 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2054 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2055 return JVMTI_ERROR_NOT_FOUND;
2056
2057 if (TraceJVMTICalls) {
2058 jvmti_breakpoints.print();
2059 }
2060
2061 return JVMTI_ERROR_NONE;
2062 } /* end ClearBreakpoint */
2063
2064
2065 //
2066 // Watched Field functions
2067 //
2068
2069 jvmtiError
2070 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2071 // make sure we haven't set this watch before
2072 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2073 fdesc_ptr->set_is_field_access_watched(true);
2074
2075 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2076
2077 return JVMTI_ERROR_NONE;
2078 } /* end SetFieldAccessWatch */
2079
2080
2081 jvmtiError
2082 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2083 // make sure we have a watch to clear
2084 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2085 fdesc_ptr->set_is_field_access_watched(false);
2086
2087 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2088
2089 return JVMTI_ERROR_NONE;
2090 } /* end ClearFieldAccessWatch */
2091
2092
2093 jvmtiError
2094 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2095 // make sure we haven't set this watch before
2096 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2097 fdesc_ptr->set_is_field_modification_watched(true);
2098
2099 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2100
2101 return JVMTI_ERROR_NONE;
2102 } /* end SetFieldModificationWatch */
2103
2104
2105 jvmtiError
2106 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2107 // make sure we have a watch to clear
2108 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2109 fdesc_ptr->set_is_field_modification_watched(false);
2110
2111 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2112
2113 return JVMTI_ERROR_NONE;
2114 } /* end ClearFieldModificationWatch */
2115
2116 //
2117 // Class functions
2118 //
2119
2120
2121 // k_mirror - may be primitive, this must be checked
2122 // signature_ptr - NULL is a valid value, must be checked
2123 // generic_ptr - NULL is a valid value, must be checked
2124 jvmtiError
2125 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2126 ResourceMark rm;
2127 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2128 Klass* k = NULL;
2129 if (!isPrimitive) {
2130 k = java_lang_Class::as_Klass(k_mirror);
2131 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2132 }
2133 if (signature_ptr != NULL) {
2134 char* result = NULL;
2135 if (isPrimitive) {
2136 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2137 result = (char*) jvmtiMalloc(2);
2138 result[0] = tchar;
2139 result[1] = '\0';
2140 } else {
2141 const char* class_sig = k->signature_name();
2142 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2143 strcpy(result, class_sig);
2144 }
2145 *signature_ptr = result;
2146 }
2147 if (generic_ptr != NULL) {
2148 *generic_ptr = NULL;
2149 if (!isPrimitive && k->is_instance_klass()) {
2150 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2151 if (soo != NULL) {
2152 const char *gen_sig = soo->as_C_string();
2153 if (gen_sig != NULL) {
2154 char* gen_result;
2155 jvmtiError err = allocate(strlen(gen_sig) + 1,
2156 (unsigned char **)&gen_result);
2157 if (err != JVMTI_ERROR_NONE) {
2158 return err;
2159 }
2160 strcpy(gen_result, gen_sig);
2161 *generic_ptr = gen_result;
2162 }
2163 }
2164 }
2165 }
2166 return JVMTI_ERROR_NONE;
2167 } /* end GetClassSignature */
2168
2169
2170 // k_mirror - may be primitive, this must be checked
2171 // status_ptr - pre-checked for NULL
2172 jvmtiError
2173 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2174 jint result = 0;
2175 if (java_lang_Class::is_primitive(k_mirror)) {
2176 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2177 } else {
2178 Klass* k = java_lang_Class::as_Klass(k_mirror);
2179 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2180 result = k->jvmti_class_status();
2181 }
2182 *status_ptr = result;
2183
2184 return JVMTI_ERROR_NONE;
2185 } /* end GetClassStatus */
2186
2187
2188 // k_mirror - may be primitive, this must be checked
2189 // source_name_ptr - pre-checked for NULL
2190 jvmtiError
2191 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2192 if (java_lang_Class::is_primitive(k_mirror)) {
2193 return JVMTI_ERROR_ABSENT_INFORMATION;
2194 }
2195 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2196 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2197
2198 if (!k_klass->is_instance_klass()) {
2199 return JVMTI_ERROR_ABSENT_INFORMATION;
2200 }
2201
2202 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2203 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2204 {
2205 JavaThread* current_thread = JavaThread::current();
2206 ResourceMark rm(current_thread);
2207 const char* sfncp = (const char*) sfnOop->as_C_string();
2208 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2209 strcpy(*source_name_ptr, sfncp);
2210 }
2211
2212 return JVMTI_ERROR_NONE;
2213 } /* end GetSourceFileName */
2214
2215
2216 // k_mirror - may be primitive, this must be checked
2217 // modifiers_ptr - pre-checked for NULL
2218 jvmtiError
2219 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2220 JavaThread* current_thread = JavaThread::current();
2221 jint result = 0;
2222 if (!java_lang_Class::is_primitive(k_mirror)) {
2223 Klass* k = java_lang_Class::as_Klass(k_mirror);
2224 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2225 result = k->compute_modifier_flags(current_thread);
2226 JavaThread* THREAD = current_thread; // pass to macros
2227 if (HAS_PENDING_EXCEPTION) {
2228 CLEAR_PENDING_EXCEPTION;
2229 return JVMTI_ERROR_INTERNAL;
2230 };
2231
2232 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2233 if(k->is_super()) {
2234 result |= JVM_ACC_SUPER;
2235 }
2236 } else {
2237 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2238 }
2239 *modifiers_ptr = result;
2240
2241 return JVMTI_ERROR_NONE;
2242 } /* end GetClassModifiers */
2243
2244
2245 // k_mirror - may be primitive, this must be checked
2246 // method_count_ptr - pre-checked for NULL
2247 // methods_ptr - pre-checked for NULL
2248 jvmtiError
2249 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2250 JavaThread* current_thread = JavaThread::current();
2251 HandleMark hm(current_thread);
2252
2253 if (java_lang_Class::is_primitive(k_mirror)) {
2254 *method_count_ptr = 0;
2255 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2256 return JVMTI_ERROR_NONE;
2257 }
2258 Klass* k = java_lang_Class::as_Klass(k_mirror);
2259 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2260
2261 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2262 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2263 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2264 }
2265
2266 if (!k->is_instance_klass()) {
2267 *method_count_ptr = 0;
2268 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2269 return JVMTI_ERROR_NONE;
2270 }
2271 instanceKlassHandle instanceK_h(current_thread, k);
2272 // Allocate the result and fill it in
2273 int result_length = instanceK_h->methods()->length();
2274 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2275 int index;
2276 bool jmethodids_found = true;
2277
2278 if (JvmtiExport::can_maintain_original_method_order()) {
2279 // Use the original method ordering indices stored in the class, so we can emit
2280 // jmethodIDs in the order they appeared in the class file
2281 for (index = 0; index < result_length; index++) {
2282 Method* m = instanceK_h->methods()->at(index);
2283 int original_index = instanceK_h->method_ordering()->at(index);
2284 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2285 jmethodID id;
2286 if (jmethodids_found) {
2287 id = m->find_jmethod_id_or_null();
2288 if (id == NULL) {
2289 // If we find an uninitialized value, make sure there is
2290 // enough space for all the uninitialized values we might
2291 // find.
2292 instanceK_h->ensure_space_for_methodids(index);
2293 jmethodids_found = false;
2294 id = m->jmethod_id();
2295 }
2296 } else {
2297 id = m->jmethod_id();
2298 }
2299 result_list[original_index] = id;
2300 }
2301 } else {
2302 // otherwise just copy in any order
2303 for (index = 0; index < result_length; index++) {
2304 Method* m = instanceK_h->methods()->at(index);
2305 jmethodID id;
2306 if (jmethodids_found) {
2307 id = m->find_jmethod_id_or_null();
2308 if (id == NULL) {
2309 // If we find an uninitialized value, make sure there is
2310 // enough space for all the uninitialized values we might
2311 // find.
2312 instanceK_h->ensure_space_for_methodids(index);
2313 jmethodids_found = false;
2314 id = m->jmethod_id();
2315 }
2316 } else {
2317 id = m->jmethod_id();
2318 }
2319 result_list[index] = id;
2320 }
2321 }
2322 // Fill in return value.
2323 *method_count_ptr = result_length;
2324 *methods_ptr = result_list;
2325
2326 return JVMTI_ERROR_NONE;
2327 } /* end GetClassMethods */
2328
2329
2330 // k_mirror - may be primitive, this must be checked
2331 // field_count_ptr - pre-checked for NULL
2332 // fields_ptr - pre-checked for NULL
2333 jvmtiError
2334 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2335 if (java_lang_Class::is_primitive(k_mirror)) {
2336 *field_count_ptr = 0;
2337 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2338 return JVMTI_ERROR_NONE;
2339 }
2340 JavaThread* current_thread = JavaThread::current();
2341 HandleMark hm(current_thread);
2342 Klass* k = java_lang_Class::as_Klass(k_mirror);
2343 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2344
2345 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2346 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2347 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2348 }
2349
2350 if (!k->is_instance_klass()) {
2351 *field_count_ptr = 0;
2352 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2353 return JVMTI_ERROR_NONE;
2354 }
2355
2356
2357 instanceKlassHandle instanceK_h(current_thread, k);
2358
2359 int result_count = 0;
2360 // First, count the fields.
2361 FilteredFieldStream flds(instanceK_h, true, true);
2362 result_count = flds.field_count();
2363
2364 // Allocate the result and fill it in
2365 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2366 // The JVMTI spec requires fields in the order they occur in the class file,
2367 // this is the reverse order of what FieldStream hands out.
2368 int id_index = (result_count - 1);
2369
2370 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2371 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2372 instanceK_h, src_st.offset(),
2373 src_st.access_flags().is_static());
2374 }
2375 assert(id_index == -1, "just checking");
2376 // Fill in the results
2377 *field_count_ptr = result_count;
2378 *fields_ptr = result_list;
2379
2380 return JVMTI_ERROR_NONE;
2381 } /* end GetClassFields */
2382
2383
2384 // k_mirror - may be primitive, this must be checked
2385 // interface_count_ptr - pre-checked for NULL
2386 // interfaces_ptr - pre-checked for NULL
2387 jvmtiError
2388 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2389 {
2390 if (java_lang_Class::is_primitive(k_mirror)) {
2391 *interface_count_ptr = 0;
2392 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2393 return JVMTI_ERROR_NONE;
2394 }
2395 JavaThread* current_thread = JavaThread::current();
2396 HandleMark hm(current_thread);
2397 Klass* k = java_lang_Class::as_Klass(k_mirror);
2398 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2399
2400 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2401 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2402 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2403
2404 if (!k->is_instance_klass()) {
2405 *interface_count_ptr = 0;
2406 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2407 return JVMTI_ERROR_NONE;
2408 }
2409
2410 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2411 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2412 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2413 for (int i_index = 0; i_index < result_length; i_index += 1) {
2414 Klass* klass_at = interface_list->at(i_index);
2415 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2416 assert(klass_at->is_interface(), "interfaces must be interfaces");
2417 oop mirror_at = klass_at->java_mirror();
2418 Handle handle_at = Handle(current_thread, mirror_at);
2419 result_list[i_index] = (jclass) jni_reference(handle_at);
2420 }
2421 *interface_count_ptr = result_length;
2422 *interfaces_ptr = result_list;
2423 }
2424
2425 return JVMTI_ERROR_NONE;
2426 } /* end GetImplementedInterfaces */
2427
2428
2429 // k_mirror - may be primitive, this must be checked
2430 // minor_version_ptr - pre-checked for NULL
2431 // major_version_ptr - pre-checked for NULL
2432 jvmtiError
2433 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2434 if (java_lang_Class::is_primitive(k_mirror)) {
2435 return JVMTI_ERROR_ABSENT_INFORMATION;
2436 }
2437 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2438 Thread *thread = Thread::current();
2439 HandleMark hm(thread);
2440 KlassHandle klass(thread, k_oop);
2441
2442 jint status = klass->jvmti_class_status();
2443 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2444 return JVMTI_ERROR_INVALID_CLASS;
2445 }
2446 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2447 return JVMTI_ERROR_ABSENT_INFORMATION;
2448 }
2449
2450 instanceKlassHandle ik(thread, k_oop);
2451 *minor_version_ptr = ik->minor_version();
2452 *major_version_ptr = ik->major_version();
2453
2454 return JVMTI_ERROR_NONE;
2455 } /* end GetClassVersionNumbers */
2456
2457
2458 // k_mirror - may be primitive, this must be checked
2459 // constant_pool_count_ptr - pre-checked for NULL
2460 // constant_pool_byte_count_ptr - pre-checked for NULL
2461 // constant_pool_bytes_ptr - pre-checked for NULL
2462 jvmtiError
2463 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2464 if (java_lang_Class::is_primitive(k_mirror)) {
2465 return JVMTI_ERROR_ABSENT_INFORMATION;
2466 }
2467
2468 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2469 Thread *thread = Thread::current();
2470 HandleMark hm(thread);
2471 ResourceMark rm(thread);
2472 KlassHandle klass(thread, k_oop);
2473
2474 jint status = klass->jvmti_class_status();
2475 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2476 return JVMTI_ERROR_INVALID_CLASS;
2477 }
2478 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2479 return JVMTI_ERROR_ABSENT_INFORMATION;
2480 }
2481
2482 instanceKlassHandle ikh(thread, k_oop);
2483 JvmtiConstantPoolReconstituter reconstituter(ikh);
2484 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2485 return reconstituter.get_error();
2486 }
2487
2488 unsigned char *cpool_bytes;
2489 int cpool_size = reconstituter.cpool_size();
2490 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2491 return reconstituter.get_error();
2492 }
2493 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2494 if (res != JVMTI_ERROR_NONE) {
2495 return res;
2496 }
2497 reconstituter.copy_cpool_bytes(cpool_bytes);
2498 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2499 return reconstituter.get_error();
2500 }
2501
2502 constantPoolHandle constants(thread, ikh->constants());
2503 *constant_pool_count_ptr = constants->length();
2504 *constant_pool_byte_count_ptr = cpool_size;
2505 *constant_pool_bytes_ptr = cpool_bytes;
2506
2507 return JVMTI_ERROR_NONE;
2508 } /* end GetConstantPool */
2509
2510
2511 // k_mirror - may be primitive, this must be checked
2512 // is_interface_ptr - pre-checked for NULL
2513 jvmtiError
2514 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2515 {
2516 bool result = false;
2517 if (!java_lang_Class::is_primitive(k_mirror)) {
2518 Klass* k = java_lang_Class::as_Klass(k_mirror);
2519 if (k != NULL && k->is_interface()) {
2520 result = true;
2521 }
2522 }
2523 *is_interface_ptr = result;
2524 }
2525
2526 return JVMTI_ERROR_NONE;
2527 } /* end IsInterface */
2528
2529
2530 // k_mirror - may be primitive, this must be checked
2531 // is_array_class_ptr - pre-checked for NULL
2532 jvmtiError
2533 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2534 {
2535 bool result = false;
2536 if (!java_lang_Class::is_primitive(k_mirror)) {
2537 Klass* k = java_lang_Class::as_Klass(k_mirror);
2538 if (k != NULL && k->is_array_klass()) {
2539 result = true;
2540 }
2541 }
2542 *is_array_class_ptr = result;
2543 }
2544
2545 return JVMTI_ERROR_NONE;
2546 } /* end IsArrayClass */
2547
2548
2549 // k_mirror - may be primitive, this must be checked
2550 // classloader_ptr - pre-checked for NULL
2551 jvmtiError
2552 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2553 {
2554 if (java_lang_Class::is_primitive(k_mirror)) {
2555 *classloader_ptr = (jclass) jni_reference(Handle());
2556 return JVMTI_ERROR_NONE;
2557 }
2558 JavaThread* current_thread = JavaThread::current();
2559 HandleMark hm(current_thread);
2560 Klass* k = java_lang_Class::as_Klass(k_mirror);
2561 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2562
2563 oop result_oop = k->class_loader();
2564 if (result_oop == NULL) {
2565 *classloader_ptr = (jclass) jni_reference(Handle());
2566 return JVMTI_ERROR_NONE;
2567 }
2568 Handle result_handle = Handle(current_thread, result_oop);
2569 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2570 *classloader_ptr = result_jnihandle;
2571 }
2572 return JVMTI_ERROR_NONE;
2573 } /* end GetClassLoader */
2574
2575
2576 // k_mirror - may be primitive, this must be checked
2577 // source_debug_extension_ptr - pre-checked for NULL
2578 jvmtiError
2579 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2580 {
2581 if (java_lang_Class::is_primitive(k_mirror)) {
2582 return JVMTI_ERROR_ABSENT_INFORMATION;
2583 }
2584 Klass* k = java_lang_Class::as_Klass(k_mirror);
2585 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2586 if (!k->is_instance_klass()) {
2587 return JVMTI_ERROR_ABSENT_INFORMATION;
2588 }
2589 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2590 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2591
2592 {
2593 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2594 strcpy(*source_debug_extension_ptr, sde);
2595 }
2596 }
2597
2598 return JVMTI_ERROR_NONE;
2599 } /* end GetSourceDebugExtension */
2600
2601 //
2602 // Object functions
2603 //
2604
2605 // hash_code_ptr - pre-checked for NULL
2606 jvmtiError
2607 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2608 oop mirror = JNIHandles::resolve_external_guard(object);
2609 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2610 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2611
2612 {
2613 jint result = (jint) mirror->identity_hash();
2614 *hash_code_ptr = result;
2615 }
2616 return JVMTI_ERROR_NONE;
2617 } /* end GetObjectHashCode */
2618
2619
2620 // info_ptr - pre-checked for NULL
2621 jvmtiError
2622 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2623 JavaThread* calling_thread = JavaThread::current();
2624 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2625 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2626 // Some of the critical threads were not suspended. go to a safepoint and try again
2627 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2628 VMThread::execute(&op);
2629 err = op.result();
2630 }
2631 return err;
2632 } /* end GetObjectMonitorUsage */
2633
2634
2635 //
2636 // Field functions
2637 //
2638
2639 // name_ptr - NULL is a valid value, must be checked
2640 // signature_ptr - NULL is a valid value, must be checked
2641 // generic_ptr - NULL is a valid value, must be checked
2642 jvmtiError
2643 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2644 JavaThread* current_thread = JavaThread::current();
2645 ResourceMark rm(current_thread);
2646 if (name_ptr == NULL) {
2647 // just don't return the name
2648 } else {
2649 const char* fieldName = fdesc_ptr->name()->as_C_string();
2650 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2651 if (*name_ptr == NULL)
2652 return JVMTI_ERROR_OUT_OF_MEMORY;
2653 strcpy(*name_ptr, fieldName);
2654 }
2655 if (signature_ptr== NULL) {
2656 // just don't return the signature
2657 } else {
2658 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2659 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2660 if (*signature_ptr == NULL)
2661 return JVMTI_ERROR_OUT_OF_MEMORY;
2662 strcpy(*signature_ptr, fieldSignature);
2663 }
2664 if (generic_ptr != NULL) {
2665 *generic_ptr = NULL;
2666 Symbol* soop = fdesc_ptr->generic_signature();
2667 if (soop != NULL) {
2668 const char* gen_sig = soop->as_C_string();
2669 if (gen_sig != NULL) {
2670 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2671 if (err != JVMTI_ERROR_NONE) {
2672 return err;
2673 }
2674 strcpy(*generic_ptr, gen_sig);
2675 }
2676 }
2677 }
2678 return JVMTI_ERROR_NONE;
2679 } /* end GetFieldName */
2680
2681
2682 // declaring_class_ptr - pre-checked for NULL
2683 jvmtiError
2684 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2685
2686 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2687 return JVMTI_ERROR_NONE;
2688 } /* end GetFieldDeclaringClass */
2689
2690
2691 // modifiers_ptr - pre-checked for NULL
2692 jvmtiError
2693 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2694
2695 AccessFlags resultFlags = fdesc_ptr->access_flags();
2696 jint result = resultFlags.as_int();
2697 *modifiers_ptr = result;
2698
2699 return JVMTI_ERROR_NONE;
2700 } /* end GetFieldModifiers */
2701
2702
2703 // is_synthetic_ptr - pre-checked for NULL
2704 jvmtiError
2705 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2706 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2707 return JVMTI_ERROR_NONE;
2708 } /* end IsFieldSynthetic */
2709
2710
2711 //
2712 // Method functions
2713 //
2714
2715 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2716 // name_ptr - NULL is a valid value, must be checked
2717 // signature_ptr - NULL is a valid value, must be checked
2718 // generic_ptr - NULL is a valid value, must be checked
2719 jvmtiError
2720 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2721 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2722 JavaThread* current_thread = JavaThread::current();
2723
2724 ResourceMark rm(current_thread); // get the utf8 name and signature
2725 if (name_ptr == NULL) {
2726 // just don't return the name
2727 } else {
2728 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2729 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2730 strcpy(*name_ptr, utf8_name);
2731 }
2732 if (signature_ptr == NULL) {
2733 // just don't return the signature
2734 } else {
2735 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2736 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2737 strcpy(*signature_ptr, utf8_signature);
2738 }
2739
2740 if (generic_ptr != NULL) {
2741 *generic_ptr = NULL;
2742 Symbol* soop = method_oop->generic_signature();
2743 if (soop != NULL) {
2744 const char* gen_sig = soop->as_C_string();
2745 if (gen_sig != NULL) {
2746 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2747 if (err != JVMTI_ERROR_NONE) {
2748 return err;
2749 }
2750 strcpy(*generic_ptr, gen_sig);
2751 }
2752 }
2753 }
2754 return JVMTI_ERROR_NONE;
2755 } /* end GetMethodName */
2756
2757
2758 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2759 // declaring_class_ptr - pre-checked for NULL
2760 jvmtiError
2761 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2762 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2763 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2764 return JVMTI_ERROR_NONE;
2765 } /* end GetMethodDeclaringClass */
2766
2767
2768 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2769 // modifiers_ptr - pre-checked for NULL
2770 jvmtiError
2771 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2772 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2773 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2774 return JVMTI_ERROR_NONE;
2775 } /* end GetMethodModifiers */
2776
2777
2778 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2779 // max_ptr - pre-checked for NULL
2780 jvmtiError
2781 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2782 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2783 // get max stack
2784 (*max_ptr) = method_oop->max_locals();
2785 return JVMTI_ERROR_NONE;
2786 } /* end GetMaxLocals */
2787
2788
2789 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2790 // size_ptr - pre-checked for NULL
2791 jvmtiError
2792 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2793 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2794 // get size of arguments
2795
2796 (*size_ptr) = method_oop->size_of_parameters();
2797 return JVMTI_ERROR_NONE;
2798 } /* end GetArgumentsSize */
2799
2800
2801 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2802 // entry_count_ptr - pre-checked for NULL
2803 // table_ptr - pre-checked for NULL
2804 jvmtiError
2805 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2806 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2807 if (!method_oop->has_linenumber_table()) {
2808 return (JVMTI_ERROR_ABSENT_INFORMATION);
2809 }
2810
2811 // The line number table is compressed so we don't know how big it is until decompressed.
2812 // Decompression is really fast so we just do it twice.
2813
2814 // Compute size of table
2815 jint num_entries = 0;
2816 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2817 while (stream.read_pair()) {
2818 num_entries++;
2819 }
2820 jvmtiLineNumberEntry *jvmti_table =
2821 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2822
2823 // Fill jvmti table
2824 if (num_entries > 0) {
2825 int index = 0;
2826 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2827 while (stream.read_pair()) {
2828 jvmti_table[index].start_location = (jlocation) stream.bci();
2829 jvmti_table[index].line_number = (jint) stream.line();
2830 index++;
2831 }
2832 assert(index == num_entries, "sanity check");
2833 }
2834
2835 // Set up results
2836 (*entry_count_ptr) = num_entries;
2837 (*table_ptr) = jvmti_table;
2838
2839 return JVMTI_ERROR_NONE;
2840 } /* end GetLineNumberTable */
2841
2842
2843 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2844 // start_location_ptr - pre-checked for NULL
2845 // end_location_ptr - pre-checked for NULL
2846 jvmtiError
2847 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2848
2849 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2850 // get start and end location
2851 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2852 if (method_oop->code_size() == 0) {
2853 // there is no code so there is no start location
2854 (*start_location_ptr) = (jlocation)(-1);
2855 } else {
2856 (*start_location_ptr) = (jlocation)(0);
2857 }
2858
2859 return JVMTI_ERROR_NONE;
2860 } /* end GetMethodLocation */
2861
2862
2863 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2864 // entry_count_ptr - pre-checked for NULL
2865 // table_ptr - pre-checked for NULL
2866 jvmtiError
2867 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2868
2869 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2870 JavaThread* current_thread = JavaThread::current();
2871
2872 // does the klass have any local variable information?
2873 InstanceKlass* ik = method_oop->method_holder();
2874 if (!ik->access_flags().has_localvariable_table()) {
2875 return (JVMTI_ERROR_ABSENT_INFORMATION);
2876 }
2877
2878 ConstantPool* constants = method_oop->constants();
2879 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2880
2881 // in the vm localvariable table representation, 6 consecutive elements in the table
2882 // represent a 6-tuple of shorts
2883 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2884 jint num_entries = method_oop->localvariable_table_length();
2885 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2886 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2887
2888 if (num_entries > 0) {
2889 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2890 for (int i = 0; i < num_entries; i++) {
2891 // get the 5 tuple information from the vm table
2892 jlocation start_location = (jlocation) table[i].start_bci;
2893 jint length = (jint) table[i].length;
2894 int name_index = (int) table[i].name_cp_index;
2895 int signature_index = (int) table[i].descriptor_cp_index;
2896 int generic_signature_index = (int) table[i].signature_cp_index;
2897 jint slot = (jint) table[i].slot;
2898
2899 // get utf8 name and signature
2900 char *name_buf = NULL;
2901 char *sig_buf = NULL;
2902 char *gen_sig_buf = NULL;
2903 {
2904 ResourceMark rm(current_thread);
2905
2906 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2907 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2908 strcpy(name_buf, utf8_name);
2909
2910 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2911 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2912 strcpy(sig_buf, utf8_signature);
2913
2914 if (generic_signature_index > 0) {
2915 const char *utf8_gen_sign = (const char *)
2916 constants->symbol_at(generic_signature_index)->as_utf8();
2917 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2918 strcpy(gen_sig_buf, utf8_gen_sign);
2919 }
2920 }
2921
2922 // fill in the jvmti local variable table
2923 jvmti_table[i].start_location = start_location;
2924 jvmti_table[i].length = length;
2925 jvmti_table[i].name = name_buf;
2926 jvmti_table[i].signature = sig_buf;
2927 jvmti_table[i].generic_signature = gen_sig_buf;
2928 jvmti_table[i].slot = slot;
2929 }
2930 }
2931
2932 // set results
2933 (*entry_count_ptr) = num_entries;
2934 (*table_ptr) = jvmti_table;
2935
2936 return JVMTI_ERROR_NONE;
2937 } /* end GetLocalVariableTable */
2938
2939
2940 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2941 // bytecode_count_ptr - pre-checked for NULL
2942 // bytecodes_ptr - pre-checked for NULL
2943 jvmtiError
2944 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2945 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2946
2947 HandleMark hm;
2948 methodHandle method(method_oop);
2949 jint size = (jint)method->code_size();
2950 jvmtiError err = allocate(size, bytecodes_ptr);
2951 if (err != JVMTI_ERROR_NONE) {
2952 return err;
2953 }
2954
2955 (*bytecode_count_ptr) = size;
2956 // get byte codes
2957 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2958
2959 return JVMTI_ERROR_NONE;
2960 } /* end GetBytecodes */
2961
2962
2963 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2964 // is_native_ptr - pre-checked for NULL
2965 jvmtiError
2966 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2967 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2968 (*is_native_ptr) = method_oop->is_native();
2969 return JVMTI_ERROR_NONE;
2970 } /* end IsMethodNative */
2971
2972
2973 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2974 // is_synthetic_ptr - pre-checked for NULL
2975 jvmtiError
2976 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
2977 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2978 (*is_synthetic_ptr) = method_oop->is_synthetic();
2979 return JVMTI_ERROR_NONE;
2980 } /* end IsMethodSynthetic */
2981
2982
2983 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2984 // is_obsolete_ptr - pre-checked for NULL
2985 jvmtiError
2986 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
2987 if (use_version_1_0_semantics() &&
2988 get_capabilities()->can_redefine_classes == 0) {
2989 // This JvmtiEnv requested version 1.0 semantics and this function
2990 // requires the can_redefine_classes capability in version 1.0 so
2991 // we need to return an error here.
2992 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2993 }
2994
2995 if (method_oop == NULL || method_oop->is_obsolete()) {
2996 *is_obsolete_ptr = true;
2997 } else {
2998 *is_obsolete_ptr = false;
2999 }
3000 return JVMTI_ERROR_NONE;
3001 } /* end IsMethodObsolete */
3002
3003 //
3004 // Raw Monitor functions
3005 //
3006
3007 // name - pre-checked for NULL
3008 // monitor_ptr - pre-checked for NULL
3009 jvmtiError
3010 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3011 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3012 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3013
3014 *monitor_ptr = (jrawMonitorID)rmonitor;
3015
3016 return JVMTI_ERROR_NONE;
3017 } /* end CreateRawMonitor */
3018
3019
3020 // rmonitor - pre-checked for validity
3021 jvmtiError
3022 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3023 if (Threads::number_of_threads() == 0) {
3024 // Remove this monitor from pending raw monitors list
3025 // if it has entered in onload or start phase.
3026 JvmtiPendingMonitors::destroy(rmonitor);
3027 } else {
3028 Thread* thread = Thread::current();
3029 if (rmonitor->is_entered(thread)) {
3030 // The caller owns this monitor which we are about to destroy.
3031 // We exit the underlying synchronization object so that the
3032 // "delete monitor" call below can work without an assertion
3033 // failure on systems that don't like destroying synchronization
3034 // objects that are locked.
3035 int r;
3036 intptr_t recursion = rmonitor->recursions();
3037 for (intptr_t i=0; i <= recursion; i++) {
3038 r = rmonitor->raw_exit(thread);
3039 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3040 if (r != ObjectMonitor::OM_OK) { // robustness
3041 return JVMTI_ERROR_INTERNAL;
3042 }
3043 }
3044 }
3045 if (rmonitor->owner() != NULL) {
3046 // The caller is trying to destroy a monitor that is locked by
3047 // someone else. While this is not forbidden by the JVMTI
3048 // spec, it will cause an assertion failure on systems that don't
3049 // like destroying synchronization objects that are locked.
3050 // We indicate a problem with the error return (and leak the
3051 // monitor's memory).
3052 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3053 }
3054 }
3055
3056 delete rmonitor;
3057
3058 return JVMTI_ERROR_NONE;
3059 } /* end DestroyRawMonitor */
3060
3061
3062 // rmonitor - pre-checked for validity
3063 jvmtiError
3064 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3065 if (Threads::number_of_threads() == 0) {
3066 // No JavaThreads exist so ObjectMonitor enter cannot be
3067 // used, add this raw monitor to the pending list.
3068 // The pending monitors will be actually entered when
3069 // the VM is setup.
3070 // See transition_pending_raw_monitors in create_vm()
3071 // in thread.cpp.
3072 JvmtiPendingMonitors::enter(rmonitor);
3073 } else {
3074 int r = 0;
3075 Thread* thread = Thread::current();
3076
3077 if (thread->is_Java_thread()) {
3078 JavaThread* current_thread = (JavaThread*)thread;
3079
3080 #ifdef PROPER_TRANSITIONS
3081 // Not really unknown but ThreadInVMfromNative does more than we want
3082 ThreadInVMfromUnknown __tiv;
3083 {
3084 ThreadBlockInVM __tbivm(current_thread);
3085 r = rmonitor->raw_enter(current_thread);
3086 }
3087 #else
3088 /* Transition to thread_blocked without entering vm state */
3089 /* This is really evil. Normally you can't undo _thread_blocked */
3090 /* transitions like this because it would cause us to miss a */
3091 /* safepoint but since the thread was already in _thread_in_native */
3092 /* the thread is not leaving a safepoint safe state and it will */
3093 /* block when it tries to return from native. We can't safepoint */
3094 /* block in here because we could deadlock the vmthread. Blech. */
3095
3096 JavaThreadState state = current_thread->thread_state();
3097 assert(state == _thread_in_native, "Must be _thread_in_native");
3098 // frame should already be walkable since we are in native
3099 assert(!current_thread->has_last_Java_frame() ||
3100 current_thread->frame_anchor()->walkable(), "Must be walkable");
3101 current_thread->set_thread_state(_thread_blocked);
3102
3103 r = rmonitor->raw_enter(current_thread);
3104 // restore state, still at a safepoint safe state
3105 current_thread->set_thread_state(state);
3106
3107 #endif /* PROPER_TRANSITIONS */
3108 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3109 } else {
3110 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3111 r = rmonitor->raw_enter(thread);
3112 } else {
3113 ShouldNotReachHere();
3114 }
3115 }
3116
3117 if (r != ObjectMonitor::OM_OK) { // robustness
3118 return JVMTI_ERROR_INTERNAL;
3119 }
3120 }
3121 return JVMTI_ERROR_NONE;
3122 } /* end RawMonitorEnter */
3123
3124
3125 // rmonitor - pre-checked for validity
3126 jvmtiError
3127 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3128 jvmtiError err = JVMTI_ERROR_NONE;
3129
3130 if (Threads::number_of_threads() == 0) {
3131 // No JavaThreads exist so just remove this monitor from the pending list.
3132 // Bool value from exit is false if rmonitor is not in the list.
3133 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3134 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3135 }
3136 } else {
3137 int r = 0;
3138 Thread* thread = Thread::current();
3139
3140 if (thread->is_Java_thread()) {
3141 JavaThread* current_thread = (JavaThread*)thread;
3142 #ifdef PROPER_TRANSITIONS
3143 // Not really unknown but ThreadInVMfromNative does more than we want
3144 ThreadInVMfromUnknown __tiv;
3145 #endif /* PROPER_TRANSITIONS */
3146 r = rmonitor->raw_exit(current_thread);
3147 } else {
3148 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3149 r = rmonitor->raw_exit(thread);
3150 } else {
3151 ShouldNotReachHere();
3152 }
3153 }
3154
3155 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3156 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3157 } else {
3158 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3159 if (r != ObjectMonitor::OM_OK) { // robustness
3160 err = JVMTI_ERROR_INTERNAL;
3161 }
3162 }
3163 }
3164 return err;
3165 } /* end RawMonitorExit */
3166
3167
3168 // rmonitor - pre-checked for validity
3169 jvmtiError
3170 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3171 int r = 0;
3172 Thread* thread = Thread::current();
3173
3174 if (thread->is_Java_thread()) {
3175 JavaThread* current_thread = (JavaThread*)thread;
3176 #ifdef PROPER_TRANSITIONS
3177 // Not really unknown but ThreadInVMfromNative does more than we want
3178 ThreadInVMfromUnknown __tiv;
3179 {
3180 ThreadBlockInVM __tbivm(current_thread);
3181 r = rmonitor->raw_wait(millis, true, current_thread);
3182 }
3183 #else
3184 /* Transition to thread_blocked without entering vm state */
3185 /* This is really evil. Normally you can't undo _thread_blocked */
3186 /* transitions like this because it would cause us to miss a */
3187 /* safepoint but since the thread was already in _thread_in_native */
3188 /* the thread is not leaving a safepoint safe state and it will */
3189 /* block when it tries to return from native. We can't safepoint */
3190 /* block in here because we could deadlock the vmthread. Blech. */
3191
3192 JavaThreadState state = current_thread->thread_state();
3193 assert(state == _thread_in_native, "Must be _thread_in_native");
3194 // frame should already be walkable since we are in native
3195 assert(!current_thread->has_last_Java_frame() ||
3196 current_thread->frame_anchor()->walkable(), "Must be walkable");
3197 current_thread->set_thread_state(_thread_blocked);
3198
3199 r = rmonitor->raw_wait(millis, true, current_thread);
3200 // restore state, still at a safepoint safe state
3201 current_thread->set_thread_state(state);
3202
3203 #endif /* PROPER_TRANSITIONS */
3204 } else {
3205 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3206 r = rmonitor->raw_wait(millis, true, thread);
3207 } else {
3208 ShouldNotReachHere();
3209 }
3210 }
3211
3212 switch (r) {
3213 case ObjectMonitor::OM_INTERRUPTED:
3214 return JVMTI_ERROR_INTERRUPT;
3215 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3216 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3217 }
3218 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3219 if (r != ObjectMonitor::OM_OK) { // robustness
3220 return JVMTI_ERROR_INTERNAL;
3221 }
3222
3223 return JVMTI_ERROR_NONE;
3224 } /* end RawMonitorWait */
3225
3226
3227 // rmonitor - pre-checked for validity
3228 jvmtiError
3229 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3230 int r = 0;
3231 Thread* thread = Thread::current();
3232
3233 if (thread->is_Java_thread()) {
3234 JavaThread* current_thread = (JavaThread*)thread;
3235 // Not really unknown but ThreadInVMfromNative does more than we want
3236 ThreadInVMfromUnknown __tiv;
3237 r = rmonitor->raw_notify(current_thread);
3238 } else {
3239 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3240 r = rmonitor->raw_notify(thread);
3241 } else {
3242 ShouldNotReachHere();
3243 }
3244 }
3245
3246 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3247 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3248 }
3249 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3250 if (r != ObjectMonitor::OM_OK) { // robustness
3251 return JVMTI_ERROR_INTERNAL;
3252 }
3253
3254 return JVMTI_ERROR_NONE;
3255 } /* end RawMonitorNotify */
3256
3257
3258 // rmonitor - pre-checked for validity
3259 jvmtiError
3260 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3261 int r = 0;
3262 Thread* thread = Thread::current();
3263
3264 if (thread->is_Java_thread()) {
3265 JavaThread* current_thread = (JavaThread*)thread;
3266 ThreadInVMfromUnknown __tiv;
3267 r = rmonitor->raw_notifyAll(current_thread);
3268 } else {
3269 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3270 r = rmonitor->raw_notifyAll(thread);
3271 } else {
3272 ShouldNotReachHere();
3273 }
3274 }
3275
3276 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3277 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3278 }
3279 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3280 if (r != ObjectMonitor::OM_OK) { // robustness
3281 return JVMTI_ERROR_INTERNAL;
3282 }
3283
3284 return JVMTI_ERROR_NONE;
3285 } /* end RawMonitorNotifyAll */
3286
3287
3288 //
3289 // JNI Function Interception functions
3290 //
3291
3292
3293 // function_table - pre-checked for NULL
3294 jvmtiError
3295 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3296 // Copy jni function table at safepoint.
3297 VM_JNIFunctionTableCopier copier(function_table);
3298 VMThread::execute(&copier);
3299
3300 return JVMTI_ERROR_NONE;
3301 } /* end SetJNIFunctionTable */
3302
3303
3304 // function_table - pre-checked for NULL
3305 jvmtiError
3306 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3307 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3308 if (*function_table == NULL)
3309 return JVMTI_ERROR_OUT_OF_MEMORY;
3310 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3311 return JVMTI_ERROR_NONE;
3312 } /* end GetJNIFunctionTable */
3313
3314
3315 //
3316 // Event Management functions
3317 //
3318
3319 jvmtiError
3320 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3321 // can only generate two event types
3322 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3323 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3324 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3325 }
3326
3327 // for compiled_method_load events we must check that the environment
3328 // has the can_generate_compiled_method_load_events capability.
3329 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3330 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3331 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3332 }
3333 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3334 } else {
3335 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3336 }
3337
3338 } /* end GenerateEvents */
3339
3340
3341 //
3342 // Extension Mechanism functions
3343 //
3344
3345 // extension_count_ptr - pre-checked for NULL
3346 // extensions - pre-checked for NULL
3347 jvmtiError
3348 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3349 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3350 } /* end GetExtensionFunctions */
3351
3352
3353 // extension_count_ptr - pre-checked for NULL
3354 // extensions - pre-checked for NULL
3355 jvmtiError
3356 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3357 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3358 } /* end GetExtensionEvents */
3359
3360
3361 // callback - NULL is a valid value, must be checked
3362 jvmtiError
3363 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3364 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3365 } /* end SetExtensionEventCallback */
3366
3367 //
3368 // Timers functions
3369 //
3370
3371 // info_ptr - pre-checked for NULL
3372 jvmtiError
3373 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3374 os::current_thread_cpu_time_info(info_ptr);
3375 return JVMTI_ERROR_NONE;
3376 } /* end GetCurrentThreadCpuTimerInfo */
3377
3378
3379 // nanos_ptr - pre-checked for NULL
3380 jvmtiError
3381 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3382 *nanos_ptr = os::current_thread_cpu_time();
3383 return JVMTI_ERROR_NONE;
3384 } /* end GetCurrentThreadCpuTime */
3385
3386
3387 // info_ptr - pre-checked for NULL
3388 jvmtiError
3389 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3390 os::thread_cpu_time_info(info_ptr);
3391 return JVMTI_ERROR_NONE;
3392 } /* end GetThreadCpuTimerInfo */
3393
3394
3395 // Threads_lock NOT held, java_thread not protected by lock
3396 // java_thread - pre-checked
3397 // nanos_ptr - pre-checked for NULL
3398 jvmtiError
3399 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3400 *nanos_ptr = os::thread_cpu_time(java_thread);
3401 return JVMTI_ERROR_NONE;
3402 } /* end GetThreadCpuTime */
3403
3404
3405 // info_ptr - pre-checked for NULL
3406 jvmtiError
3407 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3408 os::javaTimeNanos_info(info_ptr);
3409 return JVMTI_ERROR_NONE;
3410 } /* end GetTimerInfo */
3411
3412
3413 // nanos_ptr - pre-checked for NULL
3414 jvmtiError
3415 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3416 *nanos_ptr = os::javaTimeNanos();
3417 return JVMTI_ERROR_NONE;
3418 } /* end GetTime */
3419
3420
3421 // processor_count_ptr - pre-checked for NULL
3422 jvmtiError
3423 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3424 *processor_count_ptr = os::active_processor_count();
3425 return JVMTI_ERROR_NONE;
3426 } /* end GetAvailableProcessors */
3427
3428 //
3429 // System Properties functions
3430 //
3431
3432 // count_ptr - pre-checked for NULL
3433 // property_ptr - pre-checked for NULL
3434 jvmtiError
3435 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3436 jvmtiError err = JVMTI_ERROR_NONE;
3437
3438 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3439
3440 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3441 if (err != JVMTI_ERROR_NONE) {
3442 return err;
3443 }
3444 int i = 0 ;
3445 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3446 const char *key = p->key();
3447 char **tmp_value = *property_ptr+i;
3448 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3449 if (err == JVMTI_ERROR_NONE) {
3450 strcpy(*tmp_value, key);
3451 } else {
3452 // clean up previously allocated memory.
3453 for (int j=0; j<i; j++) {
3454 Deallocate((unsigned char*)*property_ptr+j);
3455 }
3456 Deallocate((unsigned char*)property_ptr);
3457 break;
3458 }
3459 }
3460 return err;
3461 } /* end GetSystemProperties */
3462
3463
3464 // property - pre-checked for NULL
3465 // value_ptr - pre-checked for NULL
3466 jvmtiError
3467 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3468 jvmtiError err = JVMTI_ERROR_NONE;
3469 const char *value;
3470
3471 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3472 if (value == NULL) {
3473 err = JVMTI_ERROR_NOT_AVAILABLE;
3474 } else {
3475 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3476 if (err == JVMTI_ERROR_NONE) {
3477 strcpy(*value_ptr, value);
3478 }
3479 }
3480 return err;
3481 } /* end GetSystemProperty */
3482
3483
3484 // property - pre-checked for NULL
3485 // value - NULL is a valid value, must be checked
3486 jvmtiError
3487 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3488 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3489
3490 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3491 if (strcmp(property, p->key()) == 0) {
3492 if (p->set_value(value_ptr)) {
3493 err = JVMTI_ERROR_NONE;
3494 }
3495 }
3496 }
3497 return err;
3498 } /* end SetSystemProperty */