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