1 /*
2 * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/modules.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "interpreter/bytecodeStream.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvmtifiles/jvmtiEnv.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.inline.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jniCheck.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "prims/jvmtiAgentThread.hpp"
45 #include "prims/jvmtiClassFileReconstituter.hpp"
46 #include "prims/jvmtiCodeBlobEvents.hpp"
47 #include "prims/jvmtiExtensions.hpp"
48 #include "prims/jvmtiGetLoadedClasses.hpp"
49 #include "prims/jvmtiImpl.hpp"
50 #include "prims/jvmtiManageCapabilities.hpp"
51 #include "prims/jvmtiRawMonitor.hpp"
52 #include "prims/jvmtiRedefineClasses.hpp"
53 #include "prims/jvmtiTagMap.hpp"
54 #include "prims/jvmtiThreadState.inline.hpp"
55 #include "prims/jvmtiUtil.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/interfaceSupport.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/jfieldIDWorkaround.hpp"
61 #include "runtime/osThread.hpp"
62 #include "runtime/reflectionUtils.hpp"
63 #include "runtime/signature.hpp"
64 #include "runtime/thread.inline.hpp"
65 #include "runtime/timerTrace.hpp"
66 #include "runtime/vframe.hpp"
67 #include "runtime/vmThread.hpp"
68 #include "services/threadService.hpp"
69 #include "utilities/exceptions.hpp"
70 #include "utilities/preserveException.hpp"
71
72
73 #define FIXLATER 0 // REMOVE this when completed.
74
75 // FIXLATER: hook into JvmtiTrace
76 #define TraceJVMTICalls false
77
78 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
79 }
80
81 JvmtiEnv::~JvmtiEnv() {
82 }
83
84 JvmtiEnv*
85 JvmtiEnv::create_a_jvmti(jint version) {
86 return new JvmtiEnv(version);
87 }
88
89 // VM operation class to copy jni function table at safepoint.
90 // More than one java threads or jvmti agents may be reading/
91 // modifying jni function tables. To reduce the risk of bad
92 // interaction b/w these threads it is copied at safepoint.
93 class VM_JNIFunctionTableCopier : public VM_Operation {
94 private:
95 const struct JNINativeInterface_ *_function_table;
96 public:
97 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
98 _function_table = func_tbl;
99 };
100
101 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
102 void doit() {
103 copy_jni_function_table(_function_table);
104 };
105 };
106
107 //
108 // Do not change the "prefix" marker below, everything above it is copied
109 // unchanged into the filled stub, everything below is controlled by the
110 // stub filler (only method bodies are carried forward, and then only for
111 // functionality still in the spec).
112 //
113 // end file prefix
114
115 //
116 // Memory Management functions
117 //
118
119 // mem_ptr - pre-checked for NULL
120 jvmtiError
121 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
122 return allocate(size, mem_ptr);
123 } /* end Allocate */
124
125
126 // mem - NULL is a valid value, must be checked
127 jvmtiError
128 JvmtiEnv::Deallocate(unsigned char* mem) {
129 return deallocate(mem);
130 } /* end Deallocate */
131
132 // Threads_lock NOT held, java_thread not protected by lock
133 // java_thread - pre-checked
134 // data - NULL is a valid value, must be checked
135 jvmtiError
136 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
137 JvmtiThreadState* state = java_thread->jvmti_thread_state();
138 if (state == NULL) {
139 if (data == NULL) {
140 // leaving state unset same as data set to NULL
141 return JVMTI_ERROR_NONE;
142 }
143 // otherwise, create the state
144 state = JvmtiThreadState::state_for(java_thread);
145 if (state == NULL) {
146 return JVMTI_ERROR_THREAD_NOT_ALIVE;
147 }
148 }
149 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
150 return JVMTI_ERROR_NONE;
151 } /* end SetThreadLocalStorage */
152
153
154 // Threads_lock NOT held
155 // thread - NOT pre-checked
156 // data_ptr - pre-checked for NULL
157 jvmtiError
158 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
159 JavaThread* current_thread = JavaThread::current();
160 if (thread == NULL) {
161 JvmtiThreadState* state = current_thread->jvmti_thread_state();
162 *data_ptr = (state == NULL) ? NULL :
163 state->env_thread_state(this)->get_agent_thread_local_storage_data();
164 } else {
165
166 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
167 // the thread to _thread_in_vm. However, when the TLS for a thread
168 // other than the current thread is required we need to transition
169 // from native so as to resolve the jthread.
170
171 ThreadInVMfromNative __tiv(current_thread);
172 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
173 debug_only(VMNativeEntryWrapper __vew;)
174
175 oop thread_oop = JNIHandles::resolve_external_guard(thread);
176 if (thread_oop == NULL) {
177 return JVMTI_ERROR_INVALID_THREAD;
178 }
179 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
180 return JVMTI_ERROR_INVALID_THREAD;
181 }
182 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
183 if (java_thread == NULL) {
184 return JVMTI_ERROR_THREAD_NOT_ALIVE;
185 }
186 JvmtiThreadState* state = java_thread->jvmti_thread_state();
187 *data_ptr = (state == NULL) ? NULL :
188 state->env_thread_state(this)->get_agent_thread_local_storage_data();
189 }
190 return JVMTI_ERROR_NONE;
191 } /* end GetThreadLocalStorage */
192
193 //
194 // Module functions
195 //
196
197 // module_count_ptr - pre-checked for NULL
198 // modules_ptr - pre-checked for NULL
199 jvmtiError
200 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
201 JvmtiModuleClosure jmc;
202
203 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
204 } /* end GetAllModules */
205
206
207 // class_loader - NULL is a valid value, must be pre-checked
208 // package_name - pre-checked for NULL
209 // module_ptr - pre-checked for NULL
210 jvmtiError
211 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
212 JavaThread* THREAD = JavaThread::current(); // pass to macros
213 ResourceMark rm(THREAD);
214
215 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
216 // Check that loader is a subclass of java.lang.ClassLoader.
217 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
218 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
219 }
220 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
221 if (HAS_PENDING_EXCEPTION) {
222 CLEAR_PENDING_EXCEPTION;
223 return JVMTI_ERROR_INTERNAL; // unexpected exception
224 }
225 *module_ptr = module;
226 return JVMTI_ERROR_NONE;
227 } /* end GetNamedModule */
228
229
230 //
231 // Class functions
232 //
233
234 // class_count_ptr - pre-checked for NULL
235 // classes_ptr - pre-checked for NULL
236 jvmtiError
237 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
238 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
239 } /* end GetLoadedClasses */
240
241
242 // initiating_loader - NULL is a valid value, must be checked
243 // class_count_ptr - pre-checked for NULL
244 // classes_ptr - pre-checked for NULL
245 jvmtiError
246 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
247 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
248 class_count_ptr, classes_ptr);
249 } /* end GetClassLoaderClasses */
250
251 // k_mirror - may be primitive, this must be checked
252 // is_modifiable_class_ptr - pre-checked for NULL
253 jvmtiError
254 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
255 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
256 JNI_TRUE : JNI_FALSE;
257 return JVMTI_ERROR_NONE;
258 } /* end IsModifiableClass */
259
260 // class_count - pre-checked to be greater than or equal to 0
261 // classes - pre-checked for NULL
262 jvmtiError
263 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
264 //TODO: add locking
265
266 int index;
267 JavaThread* current_thread = JavaThread::current();
268 ResourceMark rm(current_thread);
269
270 jvmtiClassDefinition* class_definitions =
271 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
272 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
273
274 for (index = 0; index < class_count; index++) {
275 HandleMark hm(current_thread);
276
277 jclass jcls = classes[index];
278 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
279 if (k_mirror == NULL) {
280 return JVMTI_ERROR_INVALID_CLASS;
281 }
282 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
283 return JVMTI_ERROR_INVALID_CLASS;
284 }
285
286 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
287 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
288 }
289
290 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
291 KlassHandle klass(current_thread, k_oop);
292
293 jint status = klass->jvmti_class_status();
294 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
295 return JVMTI_ERROR_INVALID_CLASS;
296 }
297
298 instanceKlassHandle ikh(current_thread, k_oop);
299 if (ikh->get_cached_class_file_bytes() == NULL) {
300 // Not cached, we need to reconstitute the class file from the
301 // VM representation. We don't attach the reconstituted class
302 // bytes to the InstanceKlass here because they have not been
303 // validated and we're not at a safepoint.
304 JvmtiClassFileReconstituter reconstituter(ikh);
305 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
306 return reconstituter.get_error();
307 }
308
309 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
310 class_definitions[index].class_bytes = (unsigned char*)
311 reconstituter.class_file_bytes();
312 } else {
313 // it is cached, get it from the cache
314 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
315 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
316 }
317 class_definitions[index].klass = jcls;
318 }
319 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
320 VMThread::execute(&op);
321 return (op.check_error());
322 } /* end RetransformClasses */
323
324
325 // class_count - pre-checked to be greater than or equal to 0
326 // class_definitions - pre-checked for NULL
327 jvmtiError
328 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
329 //TODO: add locking
330 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
331 VMThread::execute(&op);
332 return (op.check_error());
333 } /* end RedefineClasses */
334
335
336 //
337 // Object functions
338 //
339
340 // size_ptr - pre-checked for NULL
341 jvmtiError
342 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
343 oop mirror = JNIHandles::resolve_external_guard(object);
344 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
345 *size_ptr = (jlong)mirror->size() * wordSize;
346 return JVMTI_ERROR_NONE;
347 } /* end GetObjectSize */
348
349 //
350 // Method functions
351 //
352
353 // prefix - NULL is a valid value, must be checked
354 jvmtiError
355 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
356 return prefix == NULL?
357 SetNativeMethodPrefixes(0, NULL) :
358 SetNativeMethodPrefixes(1, (char**)&prefix);
359 } /* end SetNativeMethodPrefix */
360
361
362 // prefix_count - pre-checked to be greater than or equal to 0
363 // prefixes - pre-checked for NULL
364 jvmtiError
365 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
366 // Have to grab JVMTI thread state lock to be sure that some thread
367 // isn't accessing the prefixes at the same time we are setting them.
368 // No locks during VM bring-up.
369 if (Threads::number_of_threads() == 0) {
370 return set_native_method_prefixes(prefix_count, prefixes);
371 } else {
372 MutexLocker mu(JvmtiThreadState_lock);
373 return set_native_method_prefixes(prefix_count, prefixes);
374 }
375 } /* end SetNativeMethodPrefixes */
376
377 //
378 // Event Management functions
379 //
380
381 // callbacks - NULL is a valid value, must be checked
382 // size_of_callbacks - pre-checked to be greater than or equal to 0
383 jvmtiError
384 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
385 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
386 return JVMTI_ERROR_NONE;
387 } /* end SetEventCallbacks */
388
389
390 // event_thread - NULL is a valid value, must be checked
391 jvmtiError
392 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
393 JavaThread* java_thread = NULL;
394 if (event_thread != NULL) {
395 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
396 if (thread_oop == NULL) {
397 return JVMTI_ERROR_INVALID_THREAD;
398 }
399 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
400 return JVMTI_ERROR_INVALID_THREAD;
401 }
402 java_thread = java_lang_Thread::thread(thread_oop);
403 if (java_thread == NULL) {
404 return JVMTI_ERROR_THREAD_NOT_ALIVE;
405 }
406 }
407
408 // event_type must be valid
409 if (!JvmtiEventController::is_valid_event_type(event_type)) {
410 return JVMTI_ERROR_INVALID_EVENT_TYPE;
411 }
412
413 // global events cannot be controlled at thread level.
414 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
415 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
416 }
417
418 bool enabled = (mode == JVMTI_ENABLE);
419
420 // assure that needed capabilities are present
421 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
422 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
423 }
424
425 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
426 record_class_file_load_hook_enabled();
427 }
428 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
429
430 return JVMTI_ERROR_NONE;
431 } /* end SetEventNotificationMode */
432
433 //
434 // Capability functions
435 //
436
437 // capabilities_ptr - pre-checked for NULL
438 jvmtiError
439 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
440 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
441 get_prohibited_capabilities(),
442 capabilities_ptr);
443 return JVMTI_ERROR_NONE;
444 } /* end GetPotentialCapabilities */
445
446
447 // capabilities_ptr - pre-checked for NULL
448 jvmtiError
449 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
450 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
451 get_prohibited_capabilities(),
452 capabilities_ptr,
453 get_capabilities());
454 } /* end AddCapabilities */
455
456
457 // capabilities_ptr - pre-checked for NULL
458 jvmtiError
459 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
460 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
461 return JVMTI_ERROR_NONE;
462 } /* end RelinquishCapabilities */
463
464
465 // capabilities_ptr - pre-checked for NULL
466 jvmtiError
467 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
468 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
469 return JVMTI_ERROR_NONE;
470 } /* end GetCapabilities */
471
472 //
473 // Class Loader Search functions
474 //
475
476 // segment - pre-checked for NULL
477 jvmtiError
478 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
479 jvmtiPhase phase = get_phase();
480 if (phase == JVMTI_PHASE_ONLOAD) {
481 Arguments::append_sysclasspath(segment);
482 return JVMTI_ERROR_NONE;
483 } else if (use_version_1_0_semantics()) {
484 // This JvmtiEnv requested version 1.0 semantics and this function
485 // is only allowed in the ONLOAD phase in version 1.0 so we need to
486 // return an error here.
487 return JVMTI_ERROR_WRONG_PHASE;
488 } else if (phase == JVMTI_PHASE_LIVE) {
489 // The phase is checked by the wrapper that called this function,
490 // but this thread could be racing with the thread that is
491 // terminating the VM so we check one more time.
492
493 // create the zip entry
494 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
495 if (zip_entry == NULL) {
496 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
497 }
498
499 // lock the loader
500 Thread* thread = Thread::current();
501 HandleMark hm;
502 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
503
504 ObjectLocker ol(loader_lock, thread);
505
506 // add the jar file to the bootclasspath
507 log_info(class, load)("opened: %s", zip_entry->name());
508 ClassLoaderExt::append_boot_classpath(zip_entry);
509 return JVMTI_ERROR_NONE;
510 } else {
511 return JVMTI_ERROR_WRONG_PHASE;
512 }
513
514 } /* end AddToBootstrapClassLoaderSearch */
515
516
517 // segment - pre-checked for NULL
518 jvmtiError
519 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
520 jvmtiPhase phase = get_phase();
521
522 if (phase == JVMTI_PHASE_ONLOAD) {
523 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
524 if (strcmp("java.class.path", p->key()) == 0) {
525 p->append_value(segment);
526 break;
527 }
528 }
529 return JVMTI_ERROR_NONE;
530 } else if (phase == JVMTI_PHASE_LIVE) {
531 // The phase is checked by the wrapper that called this function,
532 // but this thread could be racing with the thread that is
533 // terminating the VM so we check one more time.
534 HandleMark hm;
535
536 // create the zip entry (which will open the zip file and hence
537 // check that the segment is indeed a zip file).
538 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
539 if (zip_entry == NULL) {
540 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
541 }
542 delete zip_entry; // no longer needed
543
544 // lock the loader
545 Thread* THREAD = Thread::current();
546 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
547
548 ObjectLocker ol(loader, THREAD);
549
550 // need the path as java.lang.String
551 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
552 if (HAS_PENDING_EXCEPTION) {
553 CLEAR_PENDING_EXCEPTION;
554 return JVMTI_ERROR_INTERNAL;
555 }
556
557 instanceKlassHandle loader_ik(THREAD, loader->klass());
558
559 // Invoke the appendToClassPathForInstrumentation method - if the method
560 // is not found it means the loader doesn't support adding to the class path
561 // in the live phase.
562 {
563 JavaValue res(T_VOID);
564 JavaCalls::call_special(&res,
565 loader,
566 loader_ik,
567 vmSymbols::appendToClassPathForInstrumentation_name(),
568 vmSymbols::appendToClassPathForInstrumentation_signature(),
569 path,
570 THREAD);
571 if (HAS_PENDING_EXCEPTION) {
572 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
573 CLEAR_PENDING_EXCEPTION;
574
575 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
576 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
577 } else {
578 return JVMTI_ERROR_INTERNAL;
579 }
580 }
581 }
582
583 return JVMTI_ERROR_NONE;
584 } else {
585 return JVMTI_ERROR_WRONG_PHASE;
586 }
587 } /* end AddToSystemClassLoaderSearch */
588
589 //
590 // General functions
591 //
592
593 // phase_ptr - pre-checked for NULL
594 jvmtiError
595 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
596 *phase_ptr = phase();
597 return JVMTI_ERROR_NONE;
598 } /* end GetPhase */
599
600
601 jvmtiError
602 JvmtiEnv::DisposeEnvironment() {
603 dispose();
604 return JVMTI_ERROR_NONE;
605 } /* end DisposeEnvironment */
606
607
608 // data - NULL is a valid value, must be checked
609 jvmtiError
610 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
611 set_env_local_storage(data);
612 return JVMTI_ERROR_NONE;
613 } /* end SetEnvironmentLocalStorage */
614
615
616 // data_ptr - pre-checked for NULL
617 jvmtiError
618 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
619 *data_ptr = (void*)get_env_local_storage();
620 return JVMTI_ERROR_NONE;
621 } /* end GetEnvironmentLocalStorage */
622
623 // version_ptr - pre-checked for NULL
624 jvmtiError
625 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
626 *version_ptr = JVMTI_VERSION;
627 return JVMTI_ERROR_NONE;
628 } /* end GetVersionNumber */
629
630
631 // name_ptr - pre-checked for NULL
632 jvmtiError
633 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
634 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
635 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
636 }
637 const char *name = JvmtiUtil::error_name(error);
638 if (name == NULL) {
639 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
640 }
641 size_t len = strlen(name) + 1;
642 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
643 if (err == JVMTI_ERROR_NONE) {
644 memcpy(*name_ptr, name, len);
645 }
646 return err;
647 } /* end GetErrorName */
648
649
650 jvmtiError
651 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
652 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
653 switch (flag) {
654 case JVMTI_VERBOSE_OTHER:
655 // ignore
656 break;
657 case JVMTI_VERBOSE_CLASS:
658 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
659 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
660 break;
661 case JVMTI_VERBOSE_GC:
662 if (value == 0) {
663 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
664 } else {
665 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
666 }
667 break;
668 case JVMTI_VERBOSE_JNI:
669 PrintJNIResolving = value != 0;
670 break;
671 default:
672 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
673 };
674 return JVMTI_ERROR_NONE;
675 } /* end SetVerboseFlag */
676
677
678 // format_ptr - pre-checked for NULL
679 jvmtiError
680 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
681 *format_ptr = JVMTI_JLOCATION_JVMBCI;
682 return JVMTI_ERROR_NONE;
683 } /* end GetJLocationFormat */
684
685 //
686 // Thread functions
687 //
688
689 // Threads_lock NOT held
690 // thread - NOT pre-checked
691 // thread_state_ptr - pre-checked for NULL
692 jvmtiError
693 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
694 jint state;
695 oop thread_oop;
696 JavaThread* thr;
697
698 if (thread == NULL) {
699 thread_oop = JavaThread::current()->threadObj();
700 } else {
701 thread_oop = JNIHandles::resolve_external_guard(thread);
702 }
703
704 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
705 return JVMTI_ERROR_INVALID_THREAD;
706 }
707
708 // get most state bits
709 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
710
711 // add more state bits
712 thr = java_lang_Thread::thread(thread_oop);
713 if (thr != NULL) {
714 JavaThreadState jts = thr->thread_state();
715
716 if (thr->is_being_ext_suspended()) {
717 state |= JVMTI_THREAD_STATE_SUSPENDED;
718 }
719 if (jts == _thread_in_native) {
720 state |= JVMTI_THREAD_STATE_IN_NATIVE;
721 }
722 OSThread* osThread = thr->osthread();
723 if (osThread != NULL && osThread->interrupted()) {
724 state |= JVMTI_THREAD_STATE_INTERRUPTED;
725 }
726 }
727
728 *thread_state_ptr = state;
729 return JVMTI_ERROR_NONE;
730 } /* end GetThreadState */
731
732
733 // thread_ptr - pre-checked for NULL
734 jvmtiError
735 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
736 JavaThread* current_thread = JavaThread::current();
737 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
738 return JVMTI_ERROR_NONE;
739 } /* end GetCurrentThread */
740
741
742 // threads_count_ptr - pre-checked for NULL
743 // threads_ptr - pre-checked for NULL
744 jvmtiError
745 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
746 int nthreads = 0;
747 Handle *thread_objs = NULL;
748 ResourceMark rm;
749 HandleMark hm;
750
751 // enumerate threads (including agent threads)
752 ThreadsListEnumerator tle(Thread::current(), true);
753 nthreads = tle.num_threads();
754 *threads_count_ptr = nthreads;
755
756 if (nthreads == 0) {
757 *threads_ptr = NULL;
758 return JVMTI_ERROR_NONE;
759 }
760
761 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
762 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
763
764 for (int i=0; i < nthreads; i++) {
765 thread_objs[i] = Handle(tle.get_threadObj(i));
766 }
767
768 // have to make global handles outside of Threads_lock
769 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
770 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
771
772 *threads_ptr = jthreads;
773 return JVMTI_ERROR_NONE;
774 } /* end GetAllThreads */
775
776
777 // Threads_lock NOT held, java_thread not protected by lock
778 // java_thread - pre-checked
779 jvmtiError
780 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
781 // don't allow hidden thread suspend request.
782 if (java_thread->is_hidden_from_external_view()) {
783 return (JVMTI_ERROR_NONE);
784 }
785
786 {
787 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
788 if (java_thread->is_external_suspend()) {
789 // don't allow nested external suspend requests.
790 return (JVMTI_ERROR_THREAD_SUSPENDED);
791 }
792 if (java_thread->is_exiting()) { // thread is in the process of exiting
793 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
794 }
795 java_thread->set_external_suspend();
796 }
797
798 if (!JvmtiSuspendControl::suspend(java_thread)) {
799 // the thread was in the process of exiting
800 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
801 }
802 return JVMTI_ERROR_NONE;
803 } /* end SuspendThread */
804
805
806 // request_count - pre-checked to be greater than or equal to 0
807 // request_list - pre-checked for NULL
808 // results - pre-checked for NULL
809 jvmtiError
810 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
811 int needSafepoint = 0; // > 0 if we need a safepoint
812 for (int i = 0; i < request_count; i++) {
813 JavaThread *java_thread = get_JavaThread(request_list[i]);
814 if (java_thread == NULL) {
815 results[i] = JVMTI_ERROR_INVALID_THREAD;
816 continue;
817 }
818 // the thread has not yet run or has exited (not on threads list)
819 if (java_thread->threadObj() == NULL) {
820 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
821 continue;
822 }
823 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
824 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
825 continue;
826 }
827 // don't allow hidden thread suspend request.
828 if (java_thread->is_hidden_from_external_view()) {
829 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
830 continue;
831 }
832
833 {
834 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
835 if (java_thread->is_external_suspend()) {
836 // don't allow nested external suspend requests.
837 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
838 continue;
839 }
840 if (java_thread->is_exiting()) { // thread is in the process of exiting
841 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
842 continue;
843 }
844 java_thread->set_external_suspend();
845 }
846 if (java_thread->thread_state() == _thread_in_native) {
847 // We need to try and suspend native threads here. Threads in
848 // other states will self-suspend on their next transition.
849 if (!JvmtiSuspendControl::suspend(java_thread)) {
850 // The thread was in the process of exiting. Force another
851 // safepoint to make sure that this thread transitions.
852 needSafepoint++;
853 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
854 continue;
855 }
856 } else {
857 needSafepoint++;
858 }
859 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
860 }
861 if (needSafepoint > 0) {
862 VM_ForceSafepoint vfs;
863 VMThread::execute(&vfs);
864 }
865 // per-thread suspend results returned via results parameter
866 return JVMTI_ERROR_NONE;
867 } /* end SuspendThreadList */
868
869
870 // Threads_lock NOT held, java_thread not protected by lock
871 // java_thread - pre-checked
872 jvmtiError
873 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
874 // don't allow hidden thread resume request.
875 if (java_thread->is_hidden_from_external_view()) {
876 return JVMTI_ERROR_NONE;
877 }
878
879 if (!java_thread->is_being_ext_suspended()) {
880 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
881 }
882
883 if (!JvmtiSuspendControl::resume(java_thread)) {
884 return JVMTI_ERROR_INTERNAL;
885 }
886 return JVMTI_ERROR_NONE;
887 } /* end ResumeThread */
888
889
890 // request_count - pre-checked to be greater than or equal to 0
891 // request_list - pre-checked for NULL
892 // results - pre-checked for NULL
893 jvmtiError
894 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
895 for (int i = 0; i < request_count; i++) {
896 JavaThread *java_thread = get_JavaThread(request_list[i]);
897 if (java_thread == NULL) {
898 results[i] = JVMTI_ERROR_INVALID_THREAD;
899 continue;
900 }
901 // don't allow hidden thread resume request.
902 if (java_thread->is_hidden_from_external_view()) {
903 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
904 continue;
905 }
906 if (!java_thread->is_being_ext_suspended()) {
907 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
908 continue;
909 }
910
911 if (!JvmtiSuspendControl::resume(java_thread)) {
912 results[i] = JVMTI_ERROR_INTERNAL;
913 continue;
914 }
915
916 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
917 }
918 // per-thread resume results returned via results parameter
919 return JVMTI_ERROR_NONE;
920 } /* end ResumeThreadList */
921
922
923 // Threads_lock NOT held, java_thread not protected by lock
924 // java_thread - pre-checked
925 jvmtiError
926 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
927 oop e = JNIHandles::resolve_external_guard(exception);
928 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
929
930 JavaThread::send_async_exception(java_thread->threadObj(), e);
931
932 return JVMTI_ERROR_NONE;
933
934 } /* end StopThread */
935
936
937 // Threads_lock NOT held
938 // thread - NOT pre-checked
939 jvmtiError
940 JvmtiEnv::InterruptThread(jthread thread) {
941 oop thread_oop = JNIHandles::resolve_external_guard(thread);
942 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
943 return JVMTI_ERROR_INVALID_THREAD;
944
945 JavaThread* current_thread = JavaThread::current();
946
947 // Todo: this is a duplicate of JVM_Interrupt; share code in future
948 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
949 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
950 // We need to re-resolve the java_thread, since a GC might have happened during the
951 // acquire of the lock
952
953 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
954 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
955
956 Thread::interrupt(java_thread);
957
958 return JVMTI_ERROR_NONE;
959 } /* end InterruptThread */
960
961
962 // Threads_lock NOT held
963 // thread - NOT pre-checked
964 // info_ptr - pre-checked for NULL
965 jvmtiError
966 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
967 ResourceMark rm;
968 HandleMark hm;
969
970 JavaThread* current_thread = JavaThread::current();
971
972 // if thread is NULL the current thread is used
973 oop thread_oop;
974 if (thread == NULL) {
975 thread_oop = current_thread->threadObj();
976 } else {
977 thread_oop = JNIHandles::resolve_external_guard(thread);
978 }
979 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
980 return JVMTI_ERROR_INVALID_THREAD;
981
982 Handle thread_obj(current_thread, thread_oop);
983 Handle name;
984 ThreadPriority priority;
985 Handle thread_group;
986 Handle context_class_loader;
987 bool is_daemon;
988
989 { MutexLocker mu(Threads_lock);
990
991 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
992 priority = java_lang_Thread::priority(thread_obj());
993 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
994 is_daemon = java_lang_Thread::is_daemon(thread_obj());
995
996 oop loader = java_lang_Thread::context_class_loader(thread_obj());
997 context_class_loader = Handle(current_thread, loader);
998 }
999 { const char *n;
1000
1001 if (name() != NULL) {
1002 n = java_lang_String::as_utf8_string(name());
1003 } else {
1004 int utf8_length = 0;
1005 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1006 }
1007
1008 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1009 if (info_ptr->name == NULL)
1010 return JVMTI_ERROR_OUT_OF_MEMORY;
1011
1012 strcpy(info_ptr->name, n);
1013 }
1014 info_ptr->is_daemon = is_daemon;
1015 info_ptr->priority = priority;
1016
1017 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1018 jni_reference(context_class_loader);
1019 info_ptr->thread_group = jni_reference(thread_group);
1020
1021 return JVMTI_ERROR_NONE;
1022 } /* end GetThreadInfo */
1023
1024
1025 // Threads_lock NOT held, java_thread not protected by lock
1026 // java_thread - pre-checked
1027 // owned_monitor_count_ptr - pre-checked for NULL
1028 // owned_monitors_ptr - pre-checked for NULL
1029 jvmtiError
1030 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1031 jvmtiError err = JVMTI_ERROR_NONE;
1032 JavaThread* calling_thread = JavaThread::current();
1033
1034 // growable array of jvmti monitors info on the C-heap
1035 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1036 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1037
1038 // It is only safe to perform the direct operation on the current
1039 // thread. All other usage needs to use a vm-safepoint-op for safety.
1040 if (java_thread == calling_thread) {
1041 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1042 } else {
1043 // JVMTI get monitors info at safepoint. Do not require target thread to
1044 // be suspended.
1045 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1046 VMThread::execute(&op);
1047 err = op.result();
1048 }
1049 jint owned_monitor_count = owned_monitors_list->length();
1050 if (err == JVMTI_ERROR_NONE) {
1051 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1052 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1053 // copy into the returned array
1054 for (int i = 0; i < owned_monitor_count; i++) {
1055 (*owned_monitors_ptr)[i] =
1056 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1057 }
1058 *owned_monitor_count_ptr = owned_monitor_count;
1059 }
1060 }
1061 // clean up.
1062 for (int i = 0; i < owned_monitor_count; i++) {
1063 deallocate((unsigned char*)owned_monitors_list->at(i));
1064 }
1065 delete owned_monitors_list;
1066
1067 return err;
1068 } /* end GetOwnedMonitorInfo */
1069
1070
1071 // Threads_lock NOT held, java_thread not protected by lock
1072 // java_thread - pre-checked
1073 // monitor_info_count_ptr - pre-checked for NULL
1074 // monitor_info_ptr - pre-checked for NULL
1075 jvmtiError
1076 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1077 jvmtiError err = JVMTI_ERROR_NONE;
1078 JavaThread* calling_thread = JavaThread::current();
1079
1080 // growable array of jvmti monitors info on the C-heap
1081 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1082 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1083
1084 // It is only safe to perform the direct operation on the current
1085 // thread. All other usage needs to use a vm-safepoint-op for safety.
1086 if (java_thread == calling_thread) {
1087 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1088 } else {
1089 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1090 // be suspended.
1091 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1092 VMThread::execute(&op);
1093 err = op.result();
1094 }
1095
1096 jint owned_monitor_count = owned_monitors_list->length();
1097 if (err == JVMTI_ERROR_NONE) {
1098 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1099 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1100 // copy to output array.
1101 for (int i = 0; i < owned_monitor_count; i++) {
1102 (*monitor_info_ptr)[i].monitor =
1103 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1104 (*monitor_info_ptr)[i].stack_depth =
1105 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1106 }
1107 }
1108 *monitor_info_count_ptr = owned_monitor_count;
1109 }
1110
1111 // clean up.
1112 for (int i = 0; i < owned_monitor_count; i++) {
1113 deallocate((unsigned char*)owned_monitors_list->at(i));
1114 }
1115 delete owned_monitors_list;
1116
1117 return err;
1118 } /* end GetOwnedMonitorStackDepthInfo */
1119
1120
1121 // Threads_lock NOT held, java_thread not protected by lock
1122 // java_thread - pre-checked
1123 // monitor_ptr - pre-checked for NULL
1124 jvmtiError
1125 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1126 jvmtiError err = JVMTI_ERROR_NONE;
1127 JavaThread* calling_thread = JavaThread::current();
1128
1129 // It is only safe to perform the direct operation on the current
1130 // thread. All other usage needs to use a vm-safepoint-op for safety.
1131 if (java_thread == calling_thread) {
1132 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1133 } else {
1134 // get contended monitor information at safepoint.
1135 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1136 VMThread::execute(&op);
1137 err = op.result();
1138 }
1139 return err;
1140 } /* end GetCurrentContendedMonitor */
1141
1142
1143 // Threads_lock NOT held
1144 // thread - NOT pre-checked
1145 // proc - pre-checked for NULL
1146 // arg - NULL is a valid value, must be checked
1147 jvmtiError
1148 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1149 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1150 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1151 return JVMTI_ERROR_INVALID_THREAD;
1152 }
1153 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1154 return JVMTI_ERROR_INVALID_PRIORITY;
1155 }
1156
1157 //Thread-self
1158 JavaThread* current_thread = JavaThread::current();
1159
1160 Handle thread_hndl(current_thread, thread_oop);
1161 {
1162 MutexLocker mu(Threads_lock); // grab Threads_lock
1163
1164 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1165
1166 // At this point it may be possible that no osthread was created for the
1167 // JavaThread due to lack of memory.
1168 if (new_thread == NULL || new_thread->osthread() == NULL) {
1169 if (new_thread) delete new_thread;
1170 return JVMTI_ERROR_OUT_OF_MEMORY;
1171 }
1172
1173 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1174 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1175 java_lang_Thread::set_daemon(thread_hndl());
1176
1177 new_thread->set_threadObj(thread_hndl());
1178 Threads::add(new_thread);
1179 Thread::start(new_thread);
1180 } // unlock Threads_lock
1181
1182 return JVMTI_ERROR_NONE;
1183 } /* end RunAgentThread */
1184
1185 //
1186 // Thread Group functions
1187 //
1188
1189 // group_count_ptr - pre-checked for NULL
1190 // groups_ptr - pre-checked for NULL
1191 jvmtiError
1192 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1193 JavaThread* current_thread = JavaThread::current();
1194
1195 // Only one top level thread group now.
1196 *group_count_ptr = 1;
1197
1198 // Allocate memory to store global-refs to the thread groups.
1199 // Assume this area is freed by caller.
1200 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1201
1202 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1203
1204 // Convert oop to Handle, then convert Handle to global-ref.
1205 {
1206 HandleMark hm(current_thread);
1207 Handle system_thread_group(current_thread, Universe::system_thread_group());
1208 *groups_ptr[0] = jni_reference(system_thread_group);
1209 }
1210
1211 return JVMTI_ERROR_NONE;
1212 } /* end GetTopThreadGroups */
1213
1214
1215 // info_ptr - pre-checked for NULL
1216 jvmtiError
1217 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1218 ResourceMark rm;
1219 HandleMark hm;
1220
1221 JavaThread* current_thread = JavaThread::current();
1222
1223 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1224 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1225
1226 const char* name;
1227 Handle parent_group;
1228 bool is_daemon;
1229 ThreadPriority max_priority;
1230
1231 { MutexLocker mu(Threads_lock);
1232
1233 name = java_lang_ThreadGroup::name(group_obj());
1234 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1235 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1236 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1237 }
1238
1239 info_ptr->is_daemon = is_daemon;
1240 info_ptr->max_priority = max_priority;
1241 info_ptr->parent = jni_reference(parent_group);
1242
1243 if (name != NULL) {
1244 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1245 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1246 strcpy(info_ptr->name, name);
1247 } else {
1248 info_ptr->name = NULL;
1249 }
1250
1251 return JVMTI_ERROR_NONE;
1252 } /* end GetThreadGroupInfo */
1253
1254
1255 // thread_count_ptr - pre-checked for NULL
1256 // threads_ptr - pre-checked for NULL
1257 // group_count_ptr - pre-checked for NULL
1258 // groups_ptr - pre-checked for NULL
1259 jvmtiError
1260 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1261 JavaThread* current_thread = JavaThread::current();
1262 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1263 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1264
1265 Handle *thread_objs = NULL;
1266 Handle *group_objs = NULL;
1267 int nthreads = 0;
1268 int ngroups = 0;
1269 int hidden_threads = 0;
1270
1271 ResourceMark rm;
1272 HandleMark hm;
1273
1274 Handle group_hdl(current_thread, group_obj);
1275
1276 { MutexLocker mu(Threads_lock);
1277
1278 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1279 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1280
1281 if (nthreads > 0) {
1282 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1283 assert(nthreads <= threads->length(), "too many threads");
1284 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1285 for (int i=0, j=0; i<nthreads; i++) {
1286 oop thread_obj = threads->obj_at(i);
1287 assert(thread_obj != NULL, "thread_obj is NULL");
1288 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1289 // Filter out hidden java threads.
1290 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1291 hidden_threads++;
1292 continue;
1293 }
1294 thread_objs[j++] = Handle(current_thread, thread_obj);
1295 }
1296 nthreads -= hidden_threads;
1297 }
1298 if (ngroups > 0) {
1299 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1300 assert(ngroups <= groups->length(), "too many threads");
1301 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1302 for (int i=0; i<ngroups; i++) {
1303 oop group_obj = groups->obj_at(i);
1304 assert(group_obj != NULL, "group_obj != NULL");
1305 group_objs[i] = Handle(current_thread, group_obj);
1306 }
1307 }
1308 }
1309
1310 // have to make global handles outside of Threads_lock
1311 *group_count_ptr = ngroups;
1312 *thread_count_ptr = nthreads;
1313 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1314 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1315 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1316 return JVMTI_ERROR_OUT_OF_MEMORY;
1317 }
1318 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1319 return JVMTI_ERROR_OUT_OF_MEMORY;
1320 }
1321
1322 return JVMTI_ERROR_NONE;
1323 } /* end GetThreadGroupChildren */
1324
1325
1326 //
1327 // Stack Frame functions
1328 //
1329
1330 // Threads_lock NOT held, java_thread not protected by lock
1331 // java_thread - pre-checked
1332 // max_frame_count - pre-checked to be greater than or equal to 0
1333 // frame_buffer - pre-checked for NULL
1334 // count_ptr - pre-checked for NULL
1335 jvmtiError
1336 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1337 jvmtiError err = JVMTI_ERROR_NONE;
1338
1339 // It is only safe to perform the direct operation on the current
1340 // thread. All other usage needs to use a vm-safepoint-op for safety.
1341 if (java_thread == JavaThread::current()) {
1342 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1343 } else {
1344 // JVMTI get stack trace at safepoint. Do not require target thread to
1345 // be suspended.
1346 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1347 VMThread::execute(&op);
1348 err = op.result();
1349 }
1350
1351 return err;
1352 } /* end GetStackTrace */
1353
1354
1355 // max_frame_count - pre-checked to be greater than or equal to 0
1356 // stack_info_ptr - pre-checked for NULL
1357 // thread_count_ptr - pre-checked for NULL
1358 jvmtiError
1359 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1360 jvmtiError err = JVMTI_ERROR_NONE;
1361 JavaThread* calling_thread = JavaThread::current();
1362
1363 // JVMTI get stack traces at safepoint.
1364 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1365 VMThread::execute(&op);
1366 *thread_count_ptr = op.final_thread_count();
1367 *stack_info_ptr = op.stack_info();
1368 err = op.result();
1369 return err;
1370 } /* end GetAllStackTraces */
1371
1372
1373 // thread_count - pre-checked to be greater than or equal to 0
1374 // thread_list - pre-checked for NULL
1375 // max_frame_count - pre-checked to be greater than or equal to 0
1376 // stack_info_ptr - pre-checked for NULL
1377 jvmtiError
1378 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1379 jvmtiError err = JVMTI_ERROR_NONE;
1380 // JVMTI get stack traces at safepoint.
1381 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1382 VMThread::execute(&op);
1383 err = op.result();
1384 if (err == JVMTI_ERROR_NONE) {
1385 *stack_info_ptr = op.stack_info();
1386 }
1387 return err;
1388 } /* end GetThreadListStackTraces */
1389
1390
1391 // Threads_lock NOT held, java_thread not protected by lock
1392 // java_thread - pre-checked
1393 // count_ptr - pre-checked for NULL
1394 jvmtiError
1395 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1396 jvmtiError err = JVMTI_ERROR_NONE;
1397
1398 // retrieve or create JvmtiThreadState.
1399 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1400 if (state == NULL) {
1401 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1402 }
1403
1404 // It is only safe to perform the direct operation on the current
1405 // thread. All other usage needs to use a vm-safepoint-op for safety.
1406 if (java_thread == JavaThread::current()) {
1407 err = get_frame_count(state, count_ptr);
1408 } else {
1409 // get java stack frame count at safepoint.
1410 VM_GetFrameCount op(this, state, count_ptr);
1411 VMThread::execute(&op);
1412 err = op.result();
1413 }
1414 return err;
1415 } /* end GetFrameCount */
1416
1417
1418 // Threads_lock NOT held, java_thread not protected by lock
1419 // java_thread - pre-checked
1420 jvmtiError
1421 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1422 JavaThread* current_thread = JavaThread::current();
1423 HandleMark hm(current_thread);
1424 uint32_t debug_bits = 0;
1425
1426 // retrieve or create the state
1427 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1428 if (state == NULL) {
1429 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1430 }
1431
1432 // Check if java_thread is fully suspended
1433 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1434 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1435 }
1436 // Check to see if a PopFrame was already in progress
1437 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1438 // Probably possible for JVMTI clients to trigger this, but the
1439 // JPDA backend shouldn't allow this to happen
1440 return JVMTI_ERROR_INTERNAL;
1441 }
1442
1443 {
1444 // Was workaround bug
1445 // 4812902: popFrame hangs if the method is waiting at a synchronize
1446 // Catch this condition and return an error to avoid hanging.
1447 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1448 OSThread* osThread = java_thread->osthread();
1449 if (osThread->get_state() == MONITOR_WAIT) {
1450 return JVMTI_ERROR_OPAQUE_FRAME;
1451 }
1452 }
1453
1454 {
1455 ResourceMark rm(current_thread);
1456 // Check if there are more than one Java frame in this thread, that the top two frames
1457 // are Java (not native) frames, and that there is no intervening VM frame
1458 int frame_count = 0;
1459 bool is_interpreted[2];
1460 intptr_t *frame_sp[2];
1461 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1462 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1463 methodHandle mh(current_thread, vfs.method());
1464 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1465 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1466 frame_sp[frame_count] = vfs.frame_id();
1467 if (++frame_count > 1) break;
1468 }
1469 if (frame_count < 2) {
1470 // We haven't found two adjacent non-native Java frames on the top.
1471 // There can be two situations here:
1472 // 1. There are no more java frames
1473 // 2. Two top java frames are separated by non-java native frames
1474 if(vframeFor(java_thread, 1) == NULL) {
1475 return JVMTI_ERROR_NO_MORE_FRAMES;
1476 } else {
1477 // Intervening non-java native or VM frames separate java frames.
1478 // Current implementation does not support this. See bug #5031735.
1479 // In theory it is possible to pop frames in such cases.
1480 return JVMTI_ERROR_OPAQUE_FRAME;
1481 }
1482 }
1483
1484 // If any of the top 2 frames is a compiled one, need to deoptimize it
1485 for (int i = 0; i < 2; i++) {
1486 if (!is_interpreted[i]) {
1487 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1488 }
1489 }
1490
1491 // Update the thread state to reflect that the top frame is popped
1492 // so that cur_stack_depth is maintained properly and all frameIDs
1493 // are invalidated.
1494 // The current frame will be popped later when the suspended thread
1495 // is resumed and right before returning from VM to Java.
1496 // (see call_VM_base() in assembler_<cpu>.cpp).
1497
1498 // It's fine to update the thread state here because no JVMTI events
1499 // shall be posted for this PopFrame.
1500
1501 // It is only safe to perform the direct operation on the current
1502 // thread. All other usage needs to use a vm-safepoint-op for safety.
1503 if (java_thread == JavaThread::current()) {
1504 state->update_for_pop_top_frame();
1505 } else {
1506 VM_UpdateForPopTopFrame op(state);
1507 VMThread::execute(&op);
1508 jvmtiError err = op.result();
1509 if (err != JVMTI_ERROR_NONE) {
1510 return err;
1511 }
1512 }
1513
1514 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1515 // Set pending step flag for this popframe and it is cleared when next
1516 // step event is posted.
1517 state->set_pending_step_for_popframe();
1518 }
1519
1520 return JVMTI_ERROR_NONE;
1521 } /* end PopFrame */
1522
1523
1524 // Threads_lock NOT held, java_thread not protected by lock
1525 // java_thread - pre-checked
1526 // java_thread - unchecked
1527 // depth - pre-checked as non-negative
1528 // method_ptr - pre-checked for NULL
1529 // location_ptr - pre-checked for NULL
1530 jvmtiError
1531 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1532 jvmtiError err = JVMTI_ERROR_NONE;
1533
1534 // It is only safe to perform the direct operation on the current
1535 // thread. All other usage needs to use a vm-safepoint-op for safety.
1536 if (java_thread == JavaThread::current()) {
1537 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1538 } else {
1539 // JVMTI get java stack frame location at safepoint.
1540 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1541 VMThread::execute(&op);
1542 err = op.result();
1543 }
1544 return err;
1545 } /* end GetFrameLocation */
1546
1547
1548 // Threads_lock NOT held, java_thread not protected by lock
1549 // java_thread - pre-checked
1550 // java_thread - unchecked
1551 // depth - pre-checked as non-negative
1552 jvmtiError
1553 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1554 jvmtiError err = JVMTI_ERROR_NONE;
1555 ResourceMark rm;
1556 uint32_t debug_bits = 0;
1557
1558 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1559 if (state == NULL) {
1560 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1561 }
1562
1563 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1564 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1565 }
1566
1567 if (TraceJVMTICalls) {
1568 JvmtiSuspendControl::print();
1569 }
1570
1571 vframe *vf = vframeFor(java_thread, depth);
1572 if (vf == NULL) {
1573 return JVMTI_ERROR_NO_MORE_FRAMES;
1574 }
1575
1576 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1577 return JVMTI_ERROR_OPAQUE_FRAME;
1578 }
1579
1580 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1581
1582 // It is only safe to perform the direct operation on the current
1583 // thread. All other usage needs to use a vm-safepoint-op for safety.
1584 if (java_thread == JavaThread::current()) {
1585 int frame_number = state->count_frames() - depth;
1586 state->env_thread_state(this)->set_frame_pop(frame_number);
1587 } else {
1588 VM_SetFramePop op(this, state, depth);
1589 VMThread::execute(&op);
1590 err = op.result();
1591 }
1592 return err;
1593 } /* end NotifyFramePop */
1594
1595
1596 //
1597 // Force Early Return functions
1598 //
1599
1600 // Threads_lock NOT held, java_thread not protected by lock
1601 // java_thread - pre-checked
1602 jvmtiError
1603 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1604 jvalue val;
1605 val.l = value;
1606 return force_early_return(java_thread, val, atos);
1607 } /* end ForceEarlyReturnObject */
1608
1609
1610 // Threads_lock NOT held, java_thread not protected by lock
1611 // java_thread - pre-checked
1612 jvmtiError
1613 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1614 jvalue val;
1615 val.i = value;
1616 return force_early_return(java_thread, val, itos);
1617 } /* end ForceEarlyReturnInt */
1618
1619
1620 // Threads_lock NOT held, java_thread not protected by lock
1621 // java_thread - pre-checked
1622 jvmtiError
1623 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1624 jvalue val;
1625 val.j = value;
1626 return force_early_return(java_thread, val, ltos);
1627 } /* end ForceEarlyReturnLong */
1628
1629
1630 // Threads_lock NOT held, java_thread not protected by lock
1631 // java_thread - pre-checked
1632 jvmtiError
1633 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1634 jvalue val;
1635 val.f = value;
1636 return force_early_return(java_thread, val, ftos);
1637 } /* end ForceEarlyReturnFloat */
1638
1639
1640 // Threads_lock NOT held, java_thread not protected by lock
1641 // java_thread - pre-checked
1642 jvmtiError
1643 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1644 jvalue val;
1645 val.d = value;
1646 return force_early_return(java_thread, val, dtos);
1647 } /* end ForceEarlyReturnDouble */
1648
1649
1650 // Threads_lock NOT held, java_thread not protected by lock
1651 // java_thread - pre-checked
1652 jvmtiError
1653 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1654 jvalue val;
1655 val.j = 0L;
1656 return force_early_return(java_thread, val, vtos);
1657 } /* end ForceEarlyReturnVoid */
1658
1659
1660 //
1661 // Heap functions
1662 //
1663
1664 // klass - NULL is a valid value, must be checked
1665 // initial_object - 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::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, 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("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1691 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1692 return JVMTI_ERROR_NONE;
1693 } /* end FollowReferences */
1694
1695
1696 // klass - NULL is a valid value, must be checked
1697 // callbacks - pre-checked for NULL
1698 // user_data - NULL is a valid value, must be checked
1699 jvmtiError
1700 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1701 // check klass if provided
1702 Klass* k_oop = NULL;
1703 if (klass != NULL) {
1704 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1705 if (k_mirror == NULL) {
1706 return JVMTI_ERROR_INVALID_CLASS;
1707 }
1708 if (java_lang_Class::is_primitive(k_mirror)) {
1709 return JVMTI_ERROR_NONE;
1710 }
1711 k_oop = java_lang_Class::as_Klass(k_mirror);
1712 if (k_oop == NULL) {
1713 return JVMTI_ERROR_INVALID_CLASS;
1714 }
1715 }
1716
1717 Thread *thread = Thread::current();
1718 HandleMark hm(thread);
1719 KlassHandle kh (thread, k_oop);
1720
1721 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1722 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1723 return JVMTI_ERROR_NONE;
1724 } /* end IterateThroughHeap */
1725
1726
1727 // tag_ptr - pre-checked for NULL
1728 jvmtiError
1729 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1730 oop o = JNIHandles::resolve_external_guard(object);
1731 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1732 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1733 return JVMTI_ERROR_NONE;
1734 } /* end GetTag */
1735
1736
1737 jvmtiError
1738 JvmtiEnv::SetTag(jobject object, jlong tag) {
1739 oop o = JNIHandles::resolve_external_guard(object);
1740 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1741 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1742 return JVMTI_ERROR_NONE;
1743 } /* end SetTag */
1744
1745
1746 // tag_count - pre-checked to be greater than or equal to 0
1747 // tags - pre-checked for NULL
1748 // count_ptr - pre-checked for NULL
1749 // object_result_ptr - NULL is a valid value, must be checked
1750 // tag_result_ptr - NULL is a valid value, must be checked
1751 jvmtiError
1752 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1753 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1754 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1755 } /* end GetObjectsWithTags */
1756
1757
1758 jvmtiError
1759 JvmtiEnv::ForceGarbageCollection() {
1760 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1761 return JVMTI_ERROR_NONE;
1762 } /* end ForceGarbageCollection */
1763
1764
1765 //
1766 // Heap (1.0) functions
1767 //
1768
1769 // object_reference_callback - pre-checked for NULL
1770 // user_data - NULL is a valid value, must be checked
1771 jvmtiError
1772 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1773 oop o = JNIHandles::resolve_external_guard(object);
1774 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1775 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1776 return JVMTI_ERROR_NONE;
1777 } /* end IterateOverObjectsReachableFromObject */
1778
1779
1780 // heap_root_callback - NULL is a valid value, must be checked
1781 // stack_ref_callback - NULL is a valid value, must be checked
1782 // object_ref_callback - NULL is a valid value, must be checked
1783 // user_data - NULL is a valid value, must be checked
1784 jvmtiError
1785 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1786 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1787 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1788 return JVMTI_ERROR_NONE;
1789 } /* end IterateOverReachableObjects */
1790
1791
1792 // heap_object_callback - pre-checked for NULL
1793 // user_data - NULL is a valid value, must be checked
1794 jvmtiError
1795 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1796 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1797 Thread *thread = Thread::current();
1798 HandleMark hm(thread);
1799 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1800 return JVMTI_ERROR_NONE;
1801 } /* end IterateOverHeap */
1802
1803
1804 // k_mirror - may be primitive, this must be checked
1805 // heap_object_callback - pre-checked for NULL
1806 // user_data - NULL is a valid value, must be checked
1807 jvmtiError
1808 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1809 if (java_lang_Class::is_primitive(k_mirror)) {
1810 // DO PRIMITIVE CLASS PROCESSING
1811 return JVMTI_ERROR_NONE;
1812 }
1813 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1814 if (k_oop == NULL) {
1815 return JVMTI_ERROR_INVALID_CLASS;
1816 }
1817 Thread *thread = Thread::current();
1818 HandleMark hm(thread);
1819 KlassHandle klass (thread, k_oop);
1820 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
1821 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1822 return JVMTI_ERROR_NONE;
1823 } /* end IterateOverInstancesOfClass */
1824
1825
1826 //
1827 // Local Variable functions
1828 //
1829
1830 // Threads_lock NOT held, java_thread not protected by lock
1831 // java_thread - pre-checked
1832 // java_thread - unchecked
1833 // depth - pre-checked as non-negative
1834 // value_ptr - pre-checked for NULL
1835 jvmtiError
1836 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1837 JavaThread* current_thread = JavaThread::current();
1838 // rm object is created to clean up the javaVFrame created in
1839 // doit_prologue(), but after doit() is finished with it.
1840 ResourceMark rm(current_thread);
1841
1842 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1843 VMThread::execute(&op);
1844 jvmtiError err = op.result();
1845 if (err != JVMTI_ERROR_NONE) {
1846 return err;
1847 } else {
1848 *value_ptr = op.value().l;
1849 return JVMTI_ERROR_NONE;
1850 }
1851 } /* end GetLocalObject */
1852
1853 // Threads_lock NOT held, java_thread not protected by lock
1854 // java_thread - pre-checked
1855 // java_thread - unchecked
1856 // depth - pre-checked as non-negative
1857 // value - pre-checked for NULL
1858 jvmtiError
1859 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1860 JavaThread* current_thread = JavaThread::current();
1861 // rm object is created to clean up the javaVFrame created in
1862 // doit_prologue(), but after doit() is finished with it.
1863 ResourceMark rm(current_thread);
1864
1865 VM_GetReceiver op(java_thread, current_thread, depth);
1866 VMThread::execute(&op);
1867 jvmtiError err = op.result();
1868 if (err != JVMTI_ERROR_NONE) {
1869 return err;
1870 } else {
1871 *value_ptr = op.value().l;
1872 return JVMTI_ERROR_NONE;
1873 }
1874 } /* end GetLocalInstance */
1875
1876
1877 // Threads_lock NOT held, java_thread not protected by lock
1878 // java_thread - pre-checked
1879 // java_thread - unchecked
1880 // depth - pre-checked as non-negative
1881 // value_ptr - pre-checked for NULL
1882 jvmtiError
1883 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1884 // rm object is created to clean up the javaVFrame created in
1885 // doit_prologue(), but after doit() is finished with it.
1886 ResourceMark rm;
1887
1888 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1889 VMThread::execute(&op);
1890 *value_ptr = op.value().i;
1891 return op.result();
1892 } /* end GetLocalInt */
1893
1894
1895 // Threads_lock NOT held, java_thread not protected by lock
1896 // java_thread - pre-checked
1897 // java_thread - unchecked
1898 // depth - pre-checked as non-negative
1899 // value_ptr - pre-checked for NULL
1900 jvmtiError
1901 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1902 // rm object is created to clean up the javaVFrame created in
1903 // doit_prologue(), but after doit() is finished with it.
1904 ResourceMark rm;
1905
1906 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1907 VMThread::execute(&op);
1908 *value_ptr = op.value().j;
1909 return op.result();
1910 } /* end GetLocalLong */
1911
1912
1913 // Threads_lock NOT held, java_thread not protected by lock
1914 // java_thread - pre-checked
1915 // java_thread - unchecked
1916 // depth - pre-checked as non-negative
1917 // value_ptr - pre-checked for NULL
1918 jvmtiError
1919 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1920 // rm object is created to clean up the javaVFrame created in
1921 // doit_prologue(), but after doit() is finished with it.
1922 ResourceMark rm;
1923
1924 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1925 VMThread::execute(&op);
1926 *value_ptr = op.value().f;
1927 return op.result();
1928 } /* end GetLocalFloat */
1929
1930
1931 // Threads_lock NOT held, java_thread not protected by lock
1932 // java_thread - pre-checked
1933 // java_thread - unchecked
1934 // depth - pre-checked as non-negative
1935 // value_ptr - pre-checked for NULL
1936 jvmtiError
1937 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1938 // rm object is created to clean up the javaVFrame created in
1939 // doit_prologue(), but after doit() is finished with it.
1940 ResourceMark rm;
1941
1942 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1943 VMThread::execute(&op);
1944 *value_ptr = op.value().d;
1945 return op.result();
1946 } /* end GetLocalDouble */
1947
1948
1949 // Threads_lock NOT held, java_thread not protected by lock
1950 // java_thread - pre-checked
1951 // java_thread - unchecked
1952 // depth - pre-checked as non-negative
1953 jvmtiError
1954 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1955 // rm object is created to clean up the javaVFrame created in
1956 // doit_prologue(), but after doit() is finished with it.
1957 ResourceMark rm;
1958 jvalue val;
1959 val.l = value;
1960 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1961 VMThread::execute(&op);
1962 return op.result();
1963 } /* end SetLocalObject */
1964
1965
1966 // Threads_lock NOT held, java_thread not protected by lock
1967 // java_thread - pre-checked
1968 // java_thread - unchecked
1969 // depth - pre-checked as non-negative
1970 jvmtiError
1971 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1972 // rm object is created to clean up the javaVFrame created in
1973 // doit_prologue(), but after doit() is finished with it.
1974 ResourceMark rm;
1975 jvalue val;
1976 val.i = value;
1977 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1978 VMThread::execute(&op);
1979 return op.result();
1980 } /* end SetLocalInt */
1981
1982
1983 // Threads_lock NOT held, java_thread not protected by lock
1984 // java_thread - pre-checked
1985 // java_thread - unchecked
1986 // depth - pre-checked as non-negative
1987 jvmtiError
1988 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1989 // rm object is created to clean up the javaVFrame created in
1990 // doit_prologue(), but after doit() is finished with it.
1991 ResourceMark rm;
1992 jvalue val;
1993 val.j = value;
1994 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1995 VMThread::execute(&op);
1996 return op.result();
1997 } /* end SetLocalLong */
1998
1999
2000 // Threads_lock NOT held, java_thread not protected by lock
2001 // java_thread - pre-checked
2002 // java_thread - unchecked
2003 // depth - pre-checked as non-negative
2004 jvmtiError
2005 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2006 // rm object is created to clean up the javaVFrame created in
2007 // doit_prologue(), but after doit() is finished with it.
2008 ResourceMark rm;
2009 jvalue val;
2010 val.f = value;
2011 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2012 VMThread::execute(&op);
2013 return op.result();
2014 } /* end SetLocalFloat */
2015
2016
2017 // Threads_lock NOT held, java_thread not protected by lock
2018 // java_thread - pre-checked
2019 // java_thread - unchecked
2020 // depth - pre-checked as non-negative
2021 jvmtiError
2022 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2023 // rm object is created to clean up the javaVFrame created in
2024 // doit_prologue(), but after doit() is finished with it.
2025 ResourceMark rm;
2026 jvalue val;
2027 val.d = value;
2028 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2029 VMThread::execute(&op);
2030 return op.result();
2031 } /* end SetLocalDouble */
2032
2033
2034 //
2035 // Breakpoint functions
2036 //
2037
2038 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2039 jvmtiError
2040 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2041 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2042 if (location < 0) { // simple invalid location check first
2043 return JVMTI_ERROR_INVALID_LOCATION;
2044 }
2045 // verify that the breakpoint is not past the end of the method
2046 if (location >= (jlocation) method_oop->code_size()) {
2047 return JVMTI_ERROR_INVALID_LOCATION;
2048 }
2049
2050 ResourceMark rm;
2051 JvmtiBreakpoint bp(method_oop, location);
2052 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2053 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2054 return JVMTI_ERROR_DUPLICATE;
2055
2056 if (TraceJVMTICalls) {
2057 jvmti_breakpoints.print();
2058 }
2059
2060 return JVMTI_ERROR_NONE;
2061 } /* end SetBreakpoint */
2062
2063
2064 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2065 jvmtiError
2066 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2067 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2068
2069 if (location < 0) { // simple invalid location check first
2070 return JVMTI_ERROR_INVALID_LOCATION;
2071 }
2072
2073 // verify that the breakpoint is not past the end of the method
2074 if (location >= (jlocation) method_oop->code_size()) {
2075 return JVMTI_ERROR_INVALID_LOCATION;
2076 }
2077
2078 JvmtiBreakpoint bp(method_oop, location);
2079
2080 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2081 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2082 return JVMTI_ERROR_NOT_FOUND;
2083
2084 if (TraceJVMTICalls) {
2085 jvmti_breakpoints.print();
2086 }
2087
2088 return JVMTI_ERROR_NONE;
2089 } /* end ClearBreakpoint */
2090
2091
2092 //
2093 // Watched Field functions
2094 //
2095
2096 jvmtiError
2097 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2098 // make sure we haven't set this watch before
2099 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2100 fdesc_ptr->set_is_field_access_watched(true);
2101
2102 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2103
2104 return JVMTI_ERROR_NONE;
2105 } /* end SetFieldAccessWatch */
2106
2107
2108 jvmtiError
2109 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2110 // make sure we have a watch to clear
2111 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2112 fdesc_ptr->set_is_field_access_watched(false);
2113
2114 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2115
2116 return JVMTI_ERROR_NONE;
2117 } /* end ClearFieldAccessWatch */
2118
2119
2120 jvmtiError
2121 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2122 // make sure we haven't set this watch before
2123 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2124 fdesc_ptr->set_is_field_modification_watched(true);
2125
2126 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2127
2128 return JVMTI_ERROR_NONE;
2129 } /* end SetFieldModificationWatch */
2130
2131
2132 jvmtiError
2133 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2134 // make sure we have a watch to clear
2135 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2136 fdesc_ptr->set_is_field_modification_watched(false);
2137
2138 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2139
2140 return JVMTI_ERROR_NONE;
2141 } /* end ClearFieldModificationWatch */
2142
2143 //
2144 // Class functions
2145 //
2146
2147
2148 // k_mirror - may be primitive, this must be checked
2149 // signature_ptr - NULL is a valid value, must be checked
2150 // generic_ptr - NULL is a valid value, must be checked
2151 jvmtiError
2152 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2153 ResourceMark rm;
2154 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2155 Klass* k = NULL;
2156 if (!isPrimitive) {
2157 k = java_lang_Class::as_Klass(k_mirror);
2158 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2159 }
2160 if (signature_ptr != NULL) {
2161 char* result = NULL;
2162 if (isPrimitive) {
2163 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2164 result = (char*) jvmtiMalloc(2);
2165 result[0] = tchar;
2166 result[1] = '\0';
2167 } else {
2168 const char* class_sig = k->signature_name();
2169 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2170 strcpy(result, class_sig);
2171 }
2172 *signature_ptr = result;
2173 }
2174 if (generic_ptr != NULL) {
2175 *generic_ptr = NULL;
2176 if (!isPrimitive && k->is_instance_klass()) {
2177 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2178 if (soo != NULL) {
2179 const char *gen_sig = soo->as_C_string();
2180 if (gen_sig != NULL) {
2181 char* gen_result;
2182 jvmtiError err = allocate(strlen(gen_sig) + 1,
2183 (unsigned char **)&gen_result);
2184 if (err != JVMTI_ERROR_NONE) {
2185 return err;
2186 }
2187 strcpy(gen_result, gen_sig);
2188 *generic_ptr = gen_result;
2189 }
2190 }
2191 }
2192 }
2193 return JVMTI_ERROR_NONE;
2194 } /* end GetClassSignature */
2195
2196
2197 // k_mirror - may be primitive, this must be checked
2198 // status_ptr - pre-checked for NULL
2199 jvmtiError
2200 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2201 jint result = 0;
2202 if (java_lang_Class::is_primitive(k_mirror)) {
2203 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2204 } else {
2205 Klass* k = java_lang_Class::as_Klass(k_mirror);
2206 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2207 result = k->jvmti_class_status();
2208 }
2209 *status_ptr = result;
2210
2211 return JVMTI_ERROR_NONE;
2212 } /* end GetClassStatus */
2213
2214
2215 // k_mirror - may be primitive, this must be checked
2216 // source_name_ptr - pre-checked for NULL
2217 jvmtiError
2218 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2219 if (java_lang_Class::is_primitive(k_mirror)) {
2220 return JVMTI_ERROR_ABSENT_INFORMATION;
2221 }
2222 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2223 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2224
2225 if (!k_klass->is_instance_klass()) {
2226 return JVMTI_ERROR_ABSENT_INFORMATION;
2227 }
2228
2229 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2230 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2231 {
2232 JavaThread* current_thread = JavaThread::current();
2233 ResourceMark rm(current_thread);
2234 const char* sfncp = (const char*) sfnOop->as_C_string();
2235 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2236 strcpy(*source_name_ptr, sfncp);
2237 }
2238
2239 return JVMTI_ERROR_NONE;
2240 } /* end GetSourceFileName */
2241
2242
2243 // k_mirror - may be primitive, this must be checked
2244 // modifiers_ptr - pre-checked for NULL
2245 jvmtiError
2246 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2247 JavaThread* current_thread = JavaThread::current();
2248 jint result = 0;
2249 if (!java_lang_Class::is_primitive(k_mirror)) {
2250 Klass* k = java_lang_Class::as_Klass(k_mirror);
2251 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2252 result = k->compute_modifier_flags(current_thread);
2253 JavaThread* THREAD = current_thread; // pass to macros
2254 if (HAS_PENDING_EXCEPTION) {
2255 CLEAR_PENDING_EXCEPTION;
2256 return JVMTI_ERROR_INTERNAL;
2257 };
2258
2259 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2260 if(k->is_super()) {
2261 result |= JVM_ACC_SUPER;
2262 }
2263 } else {
2264 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2265 }
2266 *modifiers_ptr = result;
2267
2268 return JVMTI_ERROR_NONE;
2269 } /* end GetClassModifiers */
2270
2271
2272 // k_mirror - may be primitive, this must be checked
2273 // method_count_ptr - pre-checked for NULL
2274 // methods_ptr - pre-checked for NULL
2275 jvmtiError
2276 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2277 JavaThread* current_thread = JavaThread::current();
2278 HandleMark hm(current_thread);
2279
2280 if (java_lang_Class::is_primitive(k_mirror)) {
2281 *method_count_ptr = 0;
2282 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2283 return JVMTI_ERROR_NONE;
2284 }
2285 Klass* k = java_lang_Class::as_Klass(k_mirror);
2286 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2287
2288 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2289 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2290 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2291 }
2292
2293 if (!k->is_instance_klass()) {
2294 *method_count_ptr = 0;
2295 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2296 return JVMTI_ERROR_NONE;
2297 }
2298 instanceKlassHandle instanceK_h(current_thread, k);
2299 // Allocate the result and fill it in
2300 int result_length = instanceK_h->methods()->length();
2301 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2302 int index;
2303 bool jmethodids_found = true;
2304
2305 if (JvmtiExport::can_maintain_original_method_order()) {
2306 // Use the original method ordering indices stored in the class, so we can emit
2307 // jmethodIDs in the order they appeared in the class file
2308 for (index = 0; index < result_length; index++) {
2309 Method* m = instanceK_h->methods()->at(index);
2310 int original_index = instanceK_h->method_ordering()->at(index);
2311 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2312 jmethodID id;
2313 if (jmethodids_found) {
2314 id = m->find_jmethod_id_or_null();
2315 if (id == NULL) {
2316 // If we find an uninitialized value, make sure there is
2317 // enough space for all the uninitialized values we might
2318 // find.
2319 instanceK_h->ensure_space_for_methodids(index);
2320 jmethodids_found = false;
2321 id = m->jmethod_id();
2322 }
2323 } else {
2324 id = m->jmethod_id();
2325 }
2326 result_list[original_index] = id;
2327 }
2328 } else {
2329 // otherwise just copy in any order
2330 for (index = 0; index < result_length; index++) {
2331 Method* m = instanceK_h->methods()->at(index);
2332 jmethodID id;
2333 if (jmethodids_found) {
2334 id = m->find_jmethod_id_or_null();
2335 if (id == NULL) {
2336 // If we find an uninitialized value, make sure there is
2337 // enough space for all the uninitialized values we might
2338 // find.
2339 instanceK_h->ensure_space_for_methodids(index);
2340 jmethodids_found = false;
2341 id = m->jmethod_id();
2342 }
2343 } else {
2344 id = m->jmethod_id();
2345 }
2346 result_list[index] = id;
2347 }
2348 }
2349 // Fill in return value.
2350 *method_count_ptr = result_length;
2351 *methods_ptr = result_list;
2352
2353 return JVMTI_ERROR_NONE;
2354 } /* end GetClassMethods */
2355
2356
2357 // k_mirror - may be primitive, this must be checked
2358 // field_count_ptr - pre-checked for NULL
2359 // fields_ptr - pre-checked for NULL
2360 jvmtiError
2361 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2362 if (java_lang_Class::is_primitive(k_mirror)) {
2363 *field_count_ptr = 0;
2364 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2365 return JVMTI_ERROR_NONE;
2366 }
2367 JavaThread* current_thread = JavaThread::current();
2368 HandleMark hm(current_thread);
2369 Klass* k = java_lang_Class::as_Klass(k_mirror);
2370 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2371
2372 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2373 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2374 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2375 }
2376
2377 if (!k->is_instance_klass()) {
2378 *field_count_ptr = 0;
2379 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2380 return JVMTI_ERROR_NONE;
2381 }
2382
2383
2384 instanceKlassHandle instanceK_h(current_thread, k);
2385
2386 int result_count = 0;
2387 // First, count the fields.
2388 FilteredFieldStream flds(instanceK_h, true, true);
2389 result_count = flds.field_count();
2390
2391 // Allocate the result and fill it in
2392 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2393 // The JVMTI spec requires fields in the order they occur in the class file,
2394 // this is the reverse order of what FieldStream hands out.
2395 int id_index = (result_count - 1);
2396
2397 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2398 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2399 instanceK_h, src_st.offset(),
2400 src_st.access_flags().is_static());
2401 }
2402 assert(id_index == -1, "just checking");
2403 // Fill in the results
2404 *field_count_ptr = result_count;
2405 *fields_ptr = result_list;
2406
2407 return JVMTI_ERROR_NONE;
2408 } /* end GetClassFields */
2409
2410
2411 // k_mirror - may be primitive, this must be checked
2412 // interface_count_ptr - pre-checked for NULL
2413 // interfaces_ptr - pre-checked for NULL
2414 jvmtiError
2415 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2416 {
2417 if (java_lang_Class::is_primitive(k_mirror)) {
2418 *interface_count_ptr = 0;
2419 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2420 return JVMTI_ERROR_NONE;
2421 }
2422 JavaThread* current_thread = JavaThread::current();
2423 HandleMark hm(current_thread);
2424 Klass* k = java_lang_Class::as_Klass(k_mirror);
2425 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2426
2427 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2428 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2429 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2430
2431 if (!k->is_instance_klass()) {
2432 *interface_count_ptr = 0;
2433 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2434 return JVMTI_ERROR_NONE;
2435 }
2436
2437 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2438 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2439 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2440 for (int i_index = 0; i_index < result_length; i_index += 1) {
2441 Klass* klass_at = interface_list->at(i_index);
2442 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2443 assert(klass_at->is_interface(), "interfaces must be interfaces");
2444 oop mirror_at = klass_at->java_mirror();
2445 Handle handle_at = Handle(current_thread, mirror_at);
2446 result_list[i_index] = (jclass) jni_reference(handle_at);
2447 }
2448 *interface_count_ptr = result_length;
2449 *interfaces_ptr = result_list;
2450 }
2451
2452 return JVMTI_ERROR_NONE;
2453 } /* end GetImplementedInterfaces */
2454
2455
2456 // k_mirror - may be primitive, this must be checked
2457 // minor_version_ptr - pre-checked for NULL
2458 // major_version_ptr - pre-checked for NULL
2459 jvmtiError
2460 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2461 if (java_lang_Class::is_primitive(k_mirror)) {
2462 return JVMTI_ERROR_ABSENT_INFORMATION;
2463 }
2464 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2465 Thread *thread = Thread::current();
2466 HandleMark hm(thread);
2467 KlassHandle klass(thread, k_oop);
2468
2469 jint status = klass->jvmti_class_status();
2470 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2471 return JVMTI_ERROR_INVALID_CLASS;
2472 }
2473 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2474 return JVMTI_ERROR_ABSENT_INFORMATION;
2475 }
2476
2477 instanceKlassHandle ik(thread, k_oop);
2478 *minor_version_ptr = ik->minor_version();
2479 *major_version_ptr = ik->major_version();
2480
2481 return JVMTI_ERROR_NONE;
2482 } /* end GetClassVersionNumbers */
2483
2484
2485 // k_mirror - may be primitive, this must be checked
2486 // constant_pool_count_ptr - pre-checked for NULL
2487 // constant_pool_byte_count_ptr - pre-checked for NULL
2488 // constant_pool_bytes_ptr - pre-checked for NULL
2489 jvmtiError
2490 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2491 if (java_lang_Class::is_primitive(k_mirror)) {
2492 return JVMTI_ERROR_ABSENT_INFORMATION;
2493 }
2494
2495 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2496 Thread *thread = Thread::current();
2497 HandleMark hm(thread);
2498 ResourceMark rm(thread);
2499 KlassHandle klass(thread, k_oop);
2500
2501 jint status = klass->jvmti_class_status();
2502 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2503 return JVMTI_ERROR_INVALID_CLASS;
2504 }
2505 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2506 return JVMTI_ERROR_ABSENT_INFORMATION;
2507 }
2508
2509 instanceKlassHandle ikh(thread, k_oop);
2510 JvmtiConstantPoolReconstituter reconstituter(ikh);
2511 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2512 return reconstituter.get_error();
2513 }
2514
2515 unsigned char *cpool_bytes;
2516 int cpool_size = reconstituter.cpool_size();
2517 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2518 return reconstituter.get_error();
2519 }
2520 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2521 if (res != JVMTI_ERROR_NONE) {
2522 return res;
2523 }
2524 reconstituter.copy_cpool_bytes(cpool_bytes);
2525 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2526 return reconstituter.get_error();
2527 }
2528
2529 constantPoolHandle constants(thread, ikh->constants());
2530 *constant_pool_count_ptr = constants->length();
2531 *constant_pool_byte_count_ptr = cpool_size;
2532 *constant_pool_bytes_ptr = cpool_bytes;
2533
2534 return JVMTI_ERROR_NONE;
2535 } /* end GetConstantPool */
2536
2537
2538 // k_mirror - may be primitive, this must be checked
2539 // is_interface_ptr - pre-checked for NULL
2540 jvmtiError
2541 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2542 {
2543 bool result = false;
2544 if (!java_lang_Class::is_primitive(k_mirror)) {
2545 Klass* k = java_lang_Class::as_Klass(k_mirror);
2546 if (k != NULL && k->is_interface()) {
2547 result = true;
2548 }
2549 }
2550 *is_interface_ptr = result;
2551 }
2552
2553 return JVMTI_ERROR_NONE;
2554 } /* end IsInterface */
2555
2556
2557 // k_mirror - may be primitive, this must be checked
2558 // is_array_class_ptr - pre-checked for NULL
2559 jvmtiError
2560 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2561 {
2562 bool result = false;
2563 if (!java_lang_Class::is_primitive(k_mirror)) {
2564 Klass* k = java_lang_Class::as_Klass(k_mirror);
2565 if (k != NULL && k->is_array_klass()) {
2566 result = true;
2567 }
2568 }
2569 *is_array_class_ptr = result;
2570 }
2571
2572 return JVMTI_ERROR_NONE;
2573 } /* end IsArrayClass */
2574
2575
2576 // k_mirror - may be primitive, this must be checked
2577 // classloader_ptr - pre-checked for NULL
2578 jvmtiError
2579 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2580 {
2581 if (java_lang_Class::is_primitive(k_mirror)) {
2582 *classloader_ptr = (jclass) jni_reference(Handle());
2583 return JVMTI_ERROR_NONE;
2584 }
2585 JavaThread* current_thread = JavaThread::current();
2586 HandleMark hm(current_thread);
2587 Klass* k = java_lang_Class::as_Klass(k_mirror);
2588 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2589
2590 oop result_oop = k->class_loader();
2591 if (result_oop == NULL) {
2592 *classloader_ptr = (jclass) jni_reference(Handle());
2593 return JVMTI_ERROR_NONE;
2594 }
2595 Handle result_handle = Handle(current_thread, result_oop);
2596 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2597 *classloader_ptr = result_jnihandle;
2598 }
2599 return JVMTI_ERROR_NONE;
2600 } /* end GetClassLoader */
2601
2602
2603 // k_mirror - may be primitive, this must be checked
2604 // source_debug_extension_ptr - pre-checked for NULL
2605 jvmtiError
2606 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2607 {
2608 if (java_lang_Class::is_primitive(k_mirror)) {
2609 return JVMTI_ERROR_ABSENT_INFORMATION;
2610 }
2611 Klass* k = java_lang_Class::as_Klass(k_mirror);
2612 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2613 if (!k->is_instance_klass()) {
2614 return JVMTI_ERROR_ABSENT_INFORMATION;
2615 }
2616 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2617 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2618
2619 {
2620 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2621 strcpy(*source_debug_extension_ptr, sde);
2622 }
2623 }
2624
2625 return JVMTI_ERROR_NONE;
2626 } /* end GetSourceDebugExtension */
2627
2628 //
2629 // Object functions
2630 //
2631
2632 // hash_code_ptr - pre-checked for NULL
2633 jvmtiError
2634 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2635 oop mirror = JNIHandles::resolve_external_guard(object);
2636 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2637 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2638
2639 {
2640 jint result = (jint) mirror->identity_hash();
2641 *hash_code_ptr = result;
2642 }
2643 return JVMTI_ERROR_NONE;
2644 } /* end GetObjectHashCode */
2645
2646
2647 // info_ptr - pre-checked for NULL
2648 jvmtiError
2649 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2650 JavaThread* calling_thread = JavaThread::current();
2651 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2652 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2653 // Some of the critical threads were not suspended. go to a safepoint and try again
2654 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2655 VMThread::execute(&op);
2656 err = op.result();
2657 }
2658 return err;
2659 } /* end GetObjectMonitorUsage */
2660
2661
2662 //
2663 // Field functions
2664 //
2665
2666 // name_ptr - NULL is a valid value, must be checked
2667 // signature_ptr - NULL is a valid value, must be checked
2668 // generic_ptr - NULL is a valid value, must be checked
2669 jvmtiError
2670 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2671 JavaThread* current_thread = JavaThread::current();
2672 ResourceMark rm(current_thread);
2673 if (name_ptr == NULL) {
2674 // just don't return the name
2675 } else {
2676 const char* fieldName = fdesc_ptr->name()->as_C_string();
2677 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2678 if (*name_ptr == NULL)
2679 return JVMTI_ERROR_OUT_OF_MEMORY;
2680 strcpy(*name_ptr, fieldName);
2681 }
2682 if (signature_ptr== NULL) {
2683 // just don't return the signature
2684 } else {
2685 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2686 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2687 if (*signature_ptr == NULL)
2688 return JVMTI_ERROR_OUT_OF_MEMORY;
2689 strcpy(*signature_ptr, fieldSignature);
2690 }
2691 if (generic_ptr != NULL) {
2692 *generic_ptr = NULL;
2693 Symbol* soop = fdesc_ptr->generic_signature();
2694 if (soop != NULL) {
2695 const char* gen_sig = soop->as_C_string();
2696 if (gen_sig != NULL) {
2697 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2698 if (err != JVMTI_ERROR_NONE) {
2699 return err;
2700 }
2701 strcpy(*generic_ptr, gen_sig);
2702 }
2703 }
2704 }
2705 return JVMTI_ERROR_NONE;
2706 } /* end GetFieldName */
2707
2708
2709 // declaring_class_ptr - pre-checked for NULL
2710 jvmtiError
2711 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2712
2713 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2714 return JVMTI_ERROR_NONE;
2715 } /* end GetFieldDeclaringClass */
2716
2717
2718 // modifiers_ptr - pre-checked for NULL
2719 jvmtiError
2720 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2721
2722 AccessFlags resultFlags = fdesc_ptr->access_flags();
2723 jint result = resultFlags.as_int();
2724 *modifiers_ptr = result;
2725
2726 return JVMTI_ERROR_NONE;
2727 } /* end GetFieldModifiers */
2728
2729
2730 // is_synthetic_ptr - pre-checked for NULL
2731 jvmtiError
2732 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2733 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2734 return JVMTI_ERROR_NONE;
2735 } /* end IsFieldSynthetic */
2736
2737
2738 //
2739 // Method functions
2740 //
2741
2742 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2743 // name_ptr - NULL is a valid value, must be checked
2744 // signature_ptr - NULL is a valid value, must be checked
2745 // generic_ptr - NULL is a valid value, must be checked
2746 jvmtiError
2747 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2748 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2749 JavaThread* current_thread = JavaThread::current();
2750
2751 ResourceMark rm(current_thread); // get the utf8 name and signature
2752 if (name_ptr == NULL) {
2753 // just don't return the name
2754 } else {
2755 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2756 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2757 strcpy(*name_ptr, utf8_name);
2758 }
2759 if (signature_ptr == NULL) {
2760 // just don't return the signature
2761 } else {
2762 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2763 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2764 strcpy(*signature_ptr, utf8_signature);
2765 }
2766
2767 if (generic_ptr != NULL) {
2768 *generic_ptr = NULL;
2769 Symbol* soop = method_oop->generic_signature();
2770 if (soop != NULL) {
2771 const char* gen_sig = soop->as_C_string();
2772 if (gen_sig != NULL) {
2773 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2774 if (err != JVMTI_ERROR_NONE) {
2775 return err;
2776 }
2777 strcpy(*generic_ptr, gen_sig);
2778 }
2779 }
2780 }
2781 return JVMTI_ERROR_NONE;
2782 } /* end GetMethodName */
2783
2784
2785 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2786 // declaring_class_ptr - pre-checked for NULL
2787 jvmtiError
2788 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2789 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2790 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2791 return JVMTI_ERROR_NONE;
2792 } /* end GetMethodDeclaringClass */
2793
2794
2795 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2796 // modifiers_ptr - pre-checked for NULL
2797 jvmtiError
2798 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2799 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2800 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2801 return JVMTI_ERROR_NONE;
2802 } /* end GetMethodModifiers */
2803
2804
2805 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2806 // max_ptr - pre-checked for NULL
2807 jvmtiError
2808 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2809 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2810 // get max stack
2811 (*max_ptr) = method_oop->max_locals();
2812 return JVMTI_ERROR_NONE;
2813 } /* end GetMaxLocals */
2814
2815
2816 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2817 // size_ptr - pre-checked for NULL
2818 jvmtiError
2819 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2820 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2821 // get size of arguments
2822
2823 (*size_ptr) = method_oop->size_of_parameters();
2824 return JVMTI_ERROR_NONE;
2825 } /* end GetArgumentsSize */
2826
2827
2828 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2829 // entry_count_ptr - pre-checked for NULL
2830 // table_ptr - pre-checked for NULL
2831 jvmtiError
2832 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2833 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2834 if (!method_oop->has_linenumber_table()) {
2835 return (JVMTI_ERROR_ABSENT_INFORMATION);
2836 }
2837
2838 // The line number table is compressed so we don't know how big it is until decompressed.
2839 // Decompression is really fast so we just do it twice.
2840
2841 // Compute size of table
2842 jint num_entries = 0;
2843 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2844 while (stream.read_pair()) {
2845 num_entries++;
2846 }
2847 jvmtiLineNumberEntry *jvmti_table =
2848 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2849
2850 // Fill jvmti table
2851 if (num_entries > 0) {
2852 int index = 0;
2853 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2854 while (stream.read_pair()) {
2855 jvmti_table[index].start_location = (jlocation) stream.bci();
2856 jvmti_table[index].line_number = (jint) stream.line();
2857 index++;
2858 }
2859 assert(index == num_entries, "sanity check");
2860 }
2861
2862 // Set up results
2863 (*entry_count_ptr) = num_entries;
2864 (*table_ptr) = jvmti_table;
2865
2866 return JVMTI_ERROR_NONE;
2867 } /* end GetLineNumberTable */
2868
2869
2870 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2871 // start_location_ptr - pre-checked for NULL
2872 // end_location_ptr - pre-checked for NULL
2873 jvmtiError
2874 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2875
2876 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2877 // get start and end location
2878 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2879 if (method_oop->code_size() == 0) {
2880 // there is no code so there is no start location
2881 (*start_location_ptr) = (jlocation)(-1);
2882 } else {
2883 (*start_location_ptr) = (jlocation)(0);
2884 }
2885
2886 return JVMTI_ERROR_NONE;
2887 } /* end GetMethodLocation */
2888
2889
2890 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2891 // entry_count_ptr - pre-checked for NULL
2892 // table_ptr - pre-checked for NULL
2893 jvmtiError
2894 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2895
2896 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2897 JavaThread* current_thread = JavaThread::current();
2898
2899 // does the klass have any local variable information?
2900 InstanceKlass* ik = method_oop->method_holder();
2901 if (!ik->access_flags().has_localvariable_table()) {
2902 return (JVMTI_ERROR_ABSENT_INFORMATION);
2903 }
2904
2905 ConstantPool* constants = method_oop->constants();
2906 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2907
2908 // in the vm localvariable table representation, 6 consecutive elements in the table
2909 // represent a 6-tuple of shorts
2910 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2911 jint num_entries = method_oop->localvariable_table_length();
2912 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2913 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2914
2915 if (num_entries > 0) {
2916 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2917 for (int i = 0; i < num_entries; i++) {
2918 // get the 5 tuple information from the vm table
2919 jlocation start_location = (jlocation) table[i].start_bci;
2920 jint length = (jint) table[i].length;
2921 int name_index = (int) table[i].name_cp_index;
2922 int signature_index = (int) table[i].descriptor_cp_index;
2923 int generic_signature_index = (int) table[i].signature_cp_index;
2924 jint slot = (jint) table[i].slot;
2925
2926 // get utf8 name and signature
2927 char *name_buf = NULL;
2928 char *sig_buf = NULL;
2929 char *gen_sig_buf = NULL;
2930 {
2931 ResourceMark rm(current_thread);
2932
2933 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2934 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2935 strcpy(name_buf, utf8_name);
2936
2937 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2938 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2939 strcpy(sig_buf, utf8_signature);
2940
2941 if (generic_signature_index > 0) {
2942 const char *utf8_gen_sign = (const char *)
2943 constants->symbol_at(generic_signature_index)->as_utf8();
2944 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2945 strcpy(gen_sig_buf, utf8_gen_sign);
2946 }
2947 }
2948
2949 // fill in the jvmti local variable table
2950 jvmti_table[i].start_location = start_location;
2951 jvmti_table[i].length = length;
2952 jvmti_table[i].name = name_buf;
2953 jvmti_table[i].signature = sig_buf;
2954 jvmti_table[i].generic_signature = gen_sig_buf;
2955 jvmti_table[i].slot = slot;
2956 }
2957 }
2958
2959 // set results
2960 (*entry_count_ptr) = num_entries;
2961 (*table_ptr) = jvmti_table;
2962
2963 return JVMTI_ERROR_NONE;
2964 } /* end GetLocalVariableTable */
2965
2966
2967 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2968 // bytecode_count_ptr - pre-checked for NULL
2969 // bytecodes_ptr - pre-checked for NULL
2970 jvmtiError
2971 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2972 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2973
2974 HandleMark hm;
2975 methodHandle method(method_oop);
2976 jint size = (jint)method->code_size();
2977 jvmtiError err = allocate(size, bytecodes_ptr);
2978 if (err != JVMTI_ERROR_NONE) {
2979 return err;
2980 }
2981
2982 (*bytecode_count_ptr) = size;
2983 // get byte codes
2984 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2985
2986 return JVMTI_ERROR_NONE;
2987 } /* end GetBytecodes */
2988
2989
2990 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2991 // is_native_ptr - pre-checked for NULL
2992 jvmtiError
2993 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2994 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2995 (*is_native_ptr) = method_oop->is_native();
2996 return JVMTI_ERROR_NONE;
2997 } /* end IsMethodNative */
2998
2999
3000 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3001 // is_synthetic_ptr - pre-checked for NULL
3002 jvmtiError
3003 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3004 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3005 (*is_synthetic_ptr) = method_oop->is_synthetic();
3006 return JVMTI_ERROR_NONE;
3007 } /* end IsMethodSynthetic */
3008
3009
3010 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3011 // is_obsolete_ptr - pre-checked for NULL
3012 jvmtiError
3013 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3014 if (use_version_1_0_semantics() &&
3015 get_capabilities()->can_redefine_classes == 0) {
3016 // This JvmtiEnv requested version 1.0 semantics and this function
3017 // requires the can_redefine_classes capability in version 1.0 so
3018 // we need to return an error here.
3019 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3020 }
3021
3022 if (method_oop == NULL || method_oop->is_obsolete()) {
3023 *is_obsolete_ptr = true;
3024 } else {
3025 *is_obsolete_ptr = false;
3026 }
3027 return JVMTI_ERROR_NONE;
3028 } /* end IsMethodObsolete */
3029
3030 //
3031 // Raw Monitor functions
3032 //
3033
3034 // name - pre-checked for NULL
3035 // monitor_ptr - pre-checked for NULL
3036 jvmtiError
3037 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3038 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3039 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3040
3041 *monitor_ptr = (jrawMonitorID)rmonitor;
3042
3043 return JVMTI_ERROR_NONE;
3044 } /* end CreateRawMonitor */
3045
3046
3047 // rmonitor - pre-checked for validity
3048 jvmtiError
3049 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3050 if (Threads::number_of_threads() == 0) {
3051 // Remove this monitor from pending raw monitors list
3052 // if it has entered in onload or start phase.
3053 JvmtiPendingMonitors::destroy(rmonitor);
3054 } else {
3055 Thread* thread = Thread::current();
3056 if (rmonitor->is_entered(thread)) {
3057 // The caller owns this monitor which we are about to destroy.
3058 // We exit the underlying synchronization object so that the
3059 // "delete monitor" call below can work without an assertion
3060 // failure on systems that don't like destroying synchronization
3061 // objects that are locked.
3062 int r;
3063 intptr_t recursion = rmonitor->recursions();
3064 for (intptr_t i=0; i <= recursion; i++) {
3065 r = rmonitor->raw_exit(thread);
3066 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3067 if (r != ObjectMonitor::OM_OK) { // robustness
3068 return JVMTI_ERROR_INTERNAL;
3069 }
3070 }
3071 }
3072 if (rmonitor->owner() != NULL) {
3073 // The caller is trying to destroy a monitor that is locked by
3074 // someone else. While this is not forbidden by the JVMTI
3075 // spec, it will cause an assertion failure on systems that don't
3076 // like destroying synchronization objects that are locked.
3077 // We indicate a problem with the error return (and leak the
3078 // monitor's memory).
3079 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3080 }
3081 }
3082
3083 delete rmonitor;
3084
3085 return JVMTI_ERROR_NONE;
3086 } /* end DestroyRawMonitor */
3087
3088
3089 // rmonitor - pre-checked for validity
3090 jvmtiError
3091 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3092 if (Threads::number_of_threads() == 0) {
3093 // No JavaThreads exist so ObjectMonitor enter cannot be
3094 // used, add this raw monitor to the pending list.
3095 // The pending monitors will be actually entered when
3096 // the VM is setup.
3097 // See transition_pending_raw_monitors in create_vm()
3098 // in thread.cpp.
3099 JvmtiPendingMonitors::enter(rmonitor);
3100 } else {
3101 int r = 0;
3102 Thread* thread = Thread::current();
3103
3104 if (thread->is_Java_thread()) {
3105 JavaThread* current_thread = (JavaThread*)thread;
3106
3107 #ifdef PROPER_TRANSITIONS
3108 // Not really unknown but ThreadInVMfromNative does more than we want
3109 ThreadInVMfromUnknown __tiv;
3110 {
3111 ThreadBlockInVM __tbivm(current_thread);
3112 r = rmonitor->raw_enter(current_thread);
3113 }
3114 #else
3115 /* Transition to thread_blocked without entering vm state */
3116 /* This is really evil. Normally you can't undo _thread_blocked */
3117 /* transitions like this because it would cause us to miss a */
3118 /* safepoint but since the thread was already in _thread_in_native */
3119 /* the thread is not leaving a safepoint safe state and it will */
3120 /* block when it tries to return from native. We can't safepoint */
3121 /* block in here because we could deadlock the vmthread. Blech. */
3122
3123 JavaThreadState state = current_thread->thread_state();
3124 assert(state == _thread_in_native, "Must be _thread_in_native");
3125 // frame should already be walkable since we are in native
3126 assert(!current_thread->has_last_Java_frame() ||
3127 current_thread->frame_anchor()->walkable(), "Must be walkable");
3128 current_thread->set_thread_state(_thread_blocked);
3129
3130 r = rmonitor->raw_enter(current_thread);
3131 // restore state, still at a safepoint safe state
3132 current_thread->set_thread_state(state);
3133
3134 #endif /* PROPER_TRANSITIONS */
3135 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3136 } else {
3137 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3138 r = rmonitor->raw_enter(thread);
3139 } else {
3140 ShouldNotReachHere();
3141 }
3142 }
3143
3144 if (r != ObjectMonitor::OM_OK) { // robustness
3145 return JVMTI_ERROR_INTERNAL;
3146 }
3147 }
3148 return JVMTI_ERROR_NONE;
3149 } /* end RawMonitorEnter */
3150
3151
3152 // rmonitor - pre-checked for validity
3153 jvmtiError
3154 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3155 jvmtiError err = JVMTI_ERROR_NONE;
3156
3157 if (Threads::number_of_threads() == 0) {
3158 // No JavaThreads exist so just remove this monitor from the pending list.
3159 // Bool value from exit is false if rmonitor is not in the list.
3160 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3161 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3162 }
3163 } else {
3164 int r = 0;
3165 Thread* thread = Thread::current();
3166
3167 if (thread->is_Java_thread()) {
3168 JavaThread* current_thread = (JavaThread*)thread;
3169 #ifdef PROPER_TRANSITIONS
3170 // Not really unknown but ThreadInVMfromNative does more than we want
3171 ThreadInVMfromUnknown __tiv;
3172 #endif /* PROPER_TRANSITIONS */
3173 r = rmonitor->raw_exit(current_thread);
3174 } else {
3175 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3176 r = rmonitor->raw_exit(thread);
3177 } else {
3178 ShouldNotReachHere();
3179 }
3180 }
3181
3182 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3183 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3184 } else {
3185 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3186 if (r != ObjectMonitor::OM_OK) { // robustness
3187 err = JVMTI_ERROR_INTERNAL;
3188 }
3189 }
3190 }
3191 return err;
3192 } /* end RawMonitorExit */
3193
3194
3195 // rmonitor - pre-checked for validity
3196 jvmtiError
3197 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3198 int r = 0;
3199 Thread* thread = Thread::current();
3200
3201 if (thread->is_Java_thread()) {
3202 JavaThread* current_thread = (JavaThread*)thread;
3203 #ifdef PROPER_TRANSITIONS
3204 // Not really unknown but ThreadInVMfromNative does more than we want
3205 ThreadInVMfromUnknown __tiv;
3206 {
3207 ThreadBlockInVM __tbivm(current_thread);
3208 r = rmonitor->raw_wait(millis, true, current_thread);
3209 }
3210 #else
3211 /* Transition to thread_blocked without entering vm state */
3212 /* This is really evil. Normally you can't undo _thread_blocked */
3213 /* transitions like this because it would cause us to miss a */
3214 /* safepoint but since the thread was already in _thread_in_native */
3215 /* the thread is not leaving a safepoint safe state and it will */
3216 /* block when it tries to return from native. We can't safepoint */
3217 /* block in here because we could deadlock the vmthread. Blech. */
3218
3219 JavaThreadState state = current_thread->thread_state();
3220 assert(state == _thread_in_native, "Must be _thread_in_native");
3221 // frame should already be walkable since we are in native
3222 assert(!current_thread->has_last_Java_frame() ||
3223 current_thread->frame_anchor()->walkable(), "Must be walkable");
3224 current_thread->set_thread_state(_thread_blocked);
3225
3226 r = rmonitor->raw_wait(millis, true, current_thread);
3227 // restore state, still at a safepoint safe state
3228 current_thread->set_thread_state(state);
3229
3230 #endif /* PROPER_TRANSITIONS */
3231 } else {
3232 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3233 r = rmonitor->raw_wait(millis, true, thread);
3234 } else {
3235 ShouldNotReachHere();
3236 }
3237 }
3238
3239 switch (r) {
3240 case ObjectMonitor::OM_INTERRUPTED:
3241 return JVMTI_ERROR_INTERRUPT;
3242 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3243 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3244 }
3245 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3246 if (r != ObjectMonitor::OM_OK) { // robustness
3247 return JVMTI_ERROR_INTERNAL;
3248 }
3249
3250 return JVMTI_ERROR_NONE;
3251 } /* end RawMonitorWait */
3252
3253
3254 // rmonitor - pre-checked for validity
3255 jvmtiError
3256 JvmtiEnv::RawMonitorNotify(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 // Not really unknown but ThreadInVMfromNative does more than we want
3263 ThreadInVMfromUnknown __tiv;
3264 r = rmonitor->raw_notify(current_thread);
3265 } else {
3266 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3267 r = rmonitor->raw_notify(thread);
3268 } else {
3269 ShouldNotReachHere();
3270 }
3271 }
3272
3273 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3274 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3275 }
3276 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3277 if (r != ObjectMonitor::OM_OK) { // robustness
3278 return JVMTI_ERROR_INTERNAL;
3279 }
3280
3281 return JVMTI_ERROR_NONE;
3282 } /* end RawMonitorNotify */
3283
3284
3285 // rmonitor - pre-checked for validity
3286 jvmtiError
3287 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3288 int r = 0;
3289 Thread* thread = Thread::current();
3290
3291 if (thread->is_Java_thread()) {
3292 JavaThread* current_thread = (JavaThread*)thread;
3293 ThreadInVMfromUnknown __tiv;
3294 r = rmonitor->raw_notifyAll(current_thread);
3295 } else {
3296 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3297 r = rmonitor->raw_notifyAll(thread);
3298 } else {
3299 ShouldNotReachHere();
3300 }
3301 }
3302
3303 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3304 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3305 }
3306 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3307 if (r != ObjectMonitor::OM_OK) { // robustness
3308 return JVMTI_ERROR_INTERNAL;
3309 }
3310
3311 return JVMTI_ERROR_NONE;
3312 } /* end RawMonitorNotifyAll */
3313
3314
3315 //
3316 // JNI Function Interception functions
3317 //
3318
3319
3320 // function_table - pre-checked for NULL
3321 jvmtiError
3322 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3323 // Copy jni function table at safepoint.
3324 VM_JNIFunctionTableCopier copier(function_table);
3325 VMThread::execute(&copier);
3326
3327 return JVMTI_ERROR_NONE;
3328 } /* end SetJNIFunctionTable */
3329
3330
3331 // function_table - pre-checked for NULL
3332 jvmtiError
3333 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3334 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3335 if (*function_table == NULL)
3336 return JVMTI_ERROR_OUT_OF_MEMORY;
3337 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3338 return JVMTI_ERROR_NONE;
3339 } /* end GetJNIFunctionTable */
3340
3341
3342 //
3343 // Event Management functions
3344 //
3345
3346 jvmtiError
3347 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3348 // can only generate two event types
3349 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3350 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3351 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3352 }
3353
3354 // for compiled_method_load events we must check that the environment
3355 // has the can_generate_compiled_method_load_events capability.
3356 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3357 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3358 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3359 }
3360 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3361 } else {
3362 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3363 }
3364
3365 } /* end GenerateEvents */
3366
3367
3368 //
3369 // Extension Mechanism functions
3370 //
3371
3372 // extension_count_ptr - pre-checked for NULL
3373 // extensions - pre-checked for NULL
3374 jvmtiError
3375 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3376 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3377 } /* end GetExtensionFunctions */
3378
3379
3380 // extension_count_ptr - pre-checked for NULL
3381 // extensions - pre-checked for NULL
3382 jvmtiError
3383 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3384 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3385 } /* end GetExtensionEvents */
3386
3387
3388 // callback - NULL is a valid value, must be checked
3389 jvmtiError
3390 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3391 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3392 } /* end SetExtensionEventCallback */
3393
3394 //
3395 // Timers functions
3396 //
3397
3398 // info_ptr - pre-checked for NULL
3399 jvmtiError
3400 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3401 os::current_thread_cpu_time_info(info_ptr);
3402 return JVMTI_ERROR_NONE;
3403 } /* end GetCurrentThreadCpuTimerInfo */
3404
3405
3406 // nanos_ptr - pre-checked for NULL
3407 jvmtiError
3408 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3409 *nanos_ptr = os::current_thread_cpu_time();
3410 return JVMTI_ERROR_NONE;
3411 } /* end GetCurrentThreadCpuTime */
3412
3413
3414 // info_ptr - pre-checked for NULL
3415 jvmtiError
3416 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3417 os::thread_cpu_time_info(info_ptr);
3418 return JVMTI_ERROR_NONE;
3419 } /* end GetThreadCpuTimerInfo */
3420
3421
3422 // Threads_lock NOT held, java_thread not protected by lock
3423 // java_thread - pre-checked
3424 // nanos_ptr - pre-checked for NULL
3425 jvmtiError
3426 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3427 *nanos_ptr = os::thread_cpu_time(java_thread);
3428 return JVMTI_ERROR_NONE;
3429 } /* end GetThreadCpuTime */
3430
3431
3432 // info_ptr - pre-checked for NULL
3433 jvmtiError
3434 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3435 os::javaTimeNanos_info(info_ptr);
3436 return JVMTI_ERROR_NONE;
3437 } /* end GetTimerInfo */
3438
3439
3440 // nanos_ptr - pre-checked for NULL
3441 jvmtiError
3442 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3443 *nanos_ptr = os::javaTimeNanos();
3444 return JVMTI_ERROR_NONE;
3445 } /* end GetTime */
3446
3447
3448 // processor_count_ptr - pre-checked for NULL
3449 jvmtiError
3450 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3451 *processor_count_ptr = os::active_processor_count();
3452 return JVMTI_ERROR_NONE;
3453 } /* end GetAvailableProcessors */
3454
3455 //
3456 // System Properties functions
3457 //
3458
3459 // count_ptr - pre-checked for NULL
3460 // property_ptr - pre-checked for NULL
3461 jvmtiError
3462 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3463 jvmtiError err = JVMTI_ERROR_NONE;
3464
3465 // Get the number of readable properties.
3466 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3467
3468 // Allocate memory to hold the exact number of readable properties.
3469 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3470 if (err != JVMTI_ERROR_NONE) {
3471 return err;
3472 }
3473 int readable_count = 0;
3474 // Loop through the system properties until all the readable properties are found.
3475 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3476 if (p->is_readable()) {
3477 const char *key = p->key();
3478 char **tmp_value = *property_ptr+readable_count;
3479 readable_count++;
3480 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3481 if (err == JVMTI_ERROR_NONE) {
3482 strcpy(*tmp_value, key);
3483 } else {
3484 // clean up previously allocated memory.
3485 for (int j=0; j<readable_count; j++) {
3486 Deallocate((unsigned char*)*property_ptr+j);
3487 }
3488 Deallocate((unsigned char*)property_ptr);
3489 break;
3490 }
3491 }
3492 }
3493 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3494 return err;
3495 } /* end GetSystemProperties */
3496
3497
3498 // property - pre-checked for NULL
3499 // value_ptr - pre-checked for NULL
3500 jvmtiError
3501 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3502 jvmtiError err = JVMTI_ERROR_NONE;
3503 const char *value;
3504
3505 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3506 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3507 if (value == NULL) {
3508 err = JVMTI_ERROR_NOT_AVAILABLE;
3509 } else {
3510 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3511 if (err == JVMTI_ERROR_NONE) {
3512 strcpy(*value_ptr, value);
3513 }
3514 }
3515 return err;
3516 } /* end GetSystemProperty */
3517
3518
3519 // property - pre-checked for NULL
3520 // value - NULL is a valid value, must be checked
3521 jvmtiError
3522 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3523 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3524
3525 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3526 if (strcmp(property, p->key()) == 0) {
3527 if (p->set_writeable_value(value_ptr)) {
3528 err = JVMTI_ERROR_NONE;
3529 }
3530 }
3531 }
3532 return err;
3533 } /* end SetSystemProperty */