1 /*
2 * Copyright (c) 2003, 2020, 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 "jfr/jfrEvents.hpp"
35 #include "jvmtifiles/jvmtiEnv.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logConfiguration.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "memory/universe.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/jniCheck.hpp"
44 #include "prims/jvm_misc.hpp"
45 #include "prims/jvmtiAgentThread.hpp"
46 #include "prims/jvmtiClassFileReconstituter.hpp"
47 #include "prims/jvmtiCodeBlobEvents.hpp"
48 #include "prims/jvmtiExtensions.hpp"
49 #include "prims/jvmtiGetLoadedClasses.hpp"
50 #include "prims/jvmtiImpl.hpp"
51 #include "prims/jvmtiManageCapabilities.hpp"
52 #include "prims/jvmtiRawMonitor.hpp"
53 #include "prims/jvmtiRedefineClasses.hpp"
54 #include "prims/jvmtiTagMap.hpp"
55 #include "prims/jvmtiThreadState.inline.hpp"
56 #include "prims/jvmtiUtil.hpp"
57 #include "runtime/arguments.hpp"
58 #include "runtime/deoptimization.hpp"
59 #include "runtime/fieldDescriptor.inline.hpp"
60 #include "runtime/handles.inline.hpp"
61 #include "runtime/interfaceSupport.inline.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/jfieldIDWorkaround.hpp"
64 #include "runtime/jniHandles.inline.hpp"
65 #include "runtime/objectMonitor.inline.hpp"
66 #include "runtime/osThread.hpp"
67 #include "runtime/reflectionUtils.hpp"
68 #include "runtime/signature.hpp"
69 #include "runtime/thread.inline.hpp"
70 #include "runtime/threadHeapSampler.hpp"
71 #include "runtime/threadSMR.hpp"
72 #include "runtime/timerTrace.hpp"
73 #include "runtime/vframe.inline.hpp"
74 #include "runtime/vmThread.hpp"
75 #include "services/threadService.hpp"
76 #include "utilities/exceptions.hpp"
77 #include "utilities/preserveException.hpp"
78 #include "utilities/utf8.hpp"
79
80
81 #define FIXLATER 0 // REMOVE this when completed.
82
83 // FIXLATER: hook into JvmtiTrace
84 #define TraceJVMTICalls false
85
86 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
87 }
88
89 JvmtiEnv::~JvmtiEnv() {
90 }
91
92 JvmtiEnv*
93 JvmtiEnv::create_a_jvmti(jint version) {
94 return new JvmtiEnv(version);
95 }
96
97 // VM operation class to copy jni function table at safepoint.
98 // More than one java threads or jvmti agents may be reading/
99 // modifying jni function tables. To reduce the risk of bad
100 // interaction b/w these threads it is copied at safepoint.
101 class VM_JNIFunctionTableCopier : public VM_Operation {
102 private:
103 const struct JNINativeInterface_ *_function_table;
104 public:
105 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
106 _function_table = func_tbl;
107 };
108
109 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
110 void doit() {
111 copy_jni_function_table(_function_table);
112 };
113 };
114
115 //
116 // Do not change the "prefix" marker below, everything above it is copied
117 // unchanged into the filled stub, everything below is controlled by the
118 // stub filler (only method bodies are carried forward, and then only for
119 // functionality still in the spec).
120 //
121 // end file prefix
122
123 //
124 // Memory Management functions
125 //
126
127 // mem_ptr - pre-checked for NULL
128 jvmtiError
129 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
130 return allocate(size, mem_ptr);
131 } /* end Allocate */
132
133
134 // mem - NULL is a valid value, must be checked
135 jvmtiError
136 JvmtiEnv::Deallocate(unsigned char* mem) {
137 return deallocate(mem);
138 } /* end Deallocate */
139
140 // Threads_lock NOT held, java_thread not protected by lock
141 // java_thread - pre-checked
142 // data - NULL is a valid value, must be checked
143 jvmtiError
144 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
145 JvmtiThreadState* state = java_thread->jvmti_thread_state();
146 if (state == NULL) {
147 if (data == NULL) {
148 // leaving state unset same as data set to NULL
149 return JVMTI_ERROR_NONE;
150 }
151 // otherwise, create the state
152 state = JvmtiThreadState::state_for(java_thread);
153 if (state == NULL) {
154 return JVMTI_ERROR_THREAD_NOT_ALIVE;
155 }
156 }
157 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
158 return JVMTI_ERROR_NONE;
159 } /* end SetThreadLocalStorage */
160
161
162 // Threads_lock NOT held
163 // thread - NOT pre-checked
164 // data_ptr - pre-checked for NULL
165 jvmtiError
166 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
167 JavaThread* current_thread = JavaThread::current();
168 if (thread == NULL) {
169 JvmtiThreadState* state = current_thread->jvmti_thread_state();
170 *data_ptr = (state == NULL) ? NULL :
171 state->env_thread_state(this)->get_agent_thread_local_storage_data();
172 } else {
173 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
174 // the thread to _thread_in_vm. However, when the TLS for a thread
175 // other than the current thread is required we need to transition
176 // from native so as to resolve the jthread.
177
178 ThreadInVMfromNative __tiv(current_thread);
179 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
180 debug_only(VMNativeEntryWrapper __vew;)
181
182 JavaThread* java_thread = NULL;
183 ThreadsListHandle tlh(current_thread);
184 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
185 if (err != JVMTI_ERROR_NONE) {
186 return err;
187 }
188
189 JvmtiThreadState* state = java_thread->jvmti_thread_state();
190 *data_ptr = (state == NULL) ? NULL :
191 state->env_thread_state(this)->get_agent_thread_local_storage_data();
192 }
193 return JVMTI_ERROR_NONE;
194 } /* end GetThreadLocalStorage */
195
196 //
197 // Module functions
198 //
199
200 // module_count_ptr - pre-checked for NULL
201 // modules_ptr - pre-checked for NULL
202 jvmtiError
203 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
204 JvmtiModuleClosure jmc;
205
206 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
207 } /* end GetAllModules */
208
209
210 // class_loader - NULL is a valid value, must be pre-checked
211 // package_name - pre-checked for NULL
212 // module_ptr - pre-checked for NULL
213 jvmtiError
214 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
215 JavaThread* THREAD = JavaThread::current(); // pass to macros
216 ResourceMark rm(THREAD);
217 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
218 // Check that loader is a subclass of java.lang.ClassLoader.
219 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
220 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
221 }
222 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
223 if (HAS_PENDING_EXCEPTION) {
224 CLEAR_PENDING_EXCEPTION;
225 return JVMTI_ERROR_INTERNAL; // unexpected exception
226 }
227 *module_ptr = module;
228 return JVMTI_ERROR_NONE;
229 } /* end GetNamedModule */
230
231
232 // module - pre-checked for NULL
233 // to_module - pre-checked for NULL
234 jvmtiError
235 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
236 JavaThread* THREAD = JavaThread::current();
237
238 // check module
239 Handle h_module(THREAD, JNIHandles::resolve(module));
240 if (!java_lang_Module::is_instance(h_module())) {
241 return JVMTI_ERROR_INVALID_MODULE;
242 }
243 // check to_module
244 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
245 if (!java_lang_Module::is_instance(h_to_module())) {
246 return JVMTI_ERROR_INVALID_MODULE;
247 }
248 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
249 } /* end AddModuleReads */
250
251
252 // module - pre-checked for NULL
253 // pkg_name - pre-checked for NULL
254 // to_module - pre-checked for NULL
255 jvmtiError
256 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
257 JavaThread* THREAD = JavaThread::current();
258 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
259
260 // check module
261 Handle h_module(THREAD, JNIHandles::resolve(module));
262 if (!java_lang_Module::is_instance(h_module())) {
263 return JVMTI_ERROR_INVALID_MODULE;
264 }
265 // check to_module
266 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
267 if (!java_lang_Module::is_instance(h_to_module())) {
268 return JVMTI_ERROR_INVALID_MODULE;
269 }
270 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
271 } /* end AddModuleExports */
272
273
274 // module - pre-checked for NULL
275 // pkg_name - pre-checked for NULL
276 // to_module - pre-checked for NULL
277 jvmtiError
278 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
279 JavaThread* THREAD = JavaThread::current();
280 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
281
282 // check module
283 Handle h_module(THREAD, JNIHandles::resolve(module));
284 if (!java_lang_Module::is_instance(h_module())) {
285 return JVMTI_ERROR_INVALID_MODULE;
286 }
287 // check to_module
288 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
289 if (!java_lang_Module::is_instance(h_to_module())) {
290 return JVMTI_ERROR_INVALID_MODULE;
291 }
292 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
293 } /* end AddModuleOpens */
294
295
296 // module - pre-checked for NULL
297 // service - pre-checked for NULL
298 jvmtiError
299 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
300 JavaThread* THREAD = JavaThread::current();
301
302 // check module
303 Handle h_module(THREAD, JNIHandles::resolve(module));
304 if (!java_lang_Module::is_instance(h_module())) {
305 return JVMTI_ERROR_INVALID_MODULE;
306 }
307 // check service
308 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
309 if (!java_lang_Class::is_instance(h_service()) ||
310 java_lang_Class::is_primitive(h_service())) {
311 return JVMTI_ERROR_INVALID_CLASS;
312 }
313 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
314 } /* end AddModuleUses */
315
316
317 // module - pre-checked for NULL
318 // service - pre-checked for NULL
319 // impl_class - pre-checked for NULL
320 jvmtiError
321 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
322 JavaThread* THREAD = JavaThread::current();
323
324 // check module
325 Handle h_module(THREAD, JNIHandles::resolve(module));
326 if (!java_lang_Module::is_instance(h_module())) {
327 return JVMTI_ERROR_INVALID_MODULE;
328 }
329 // check service
330 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
331 if (!java_lang_Class::is_instance(h_service()) ||
332 java_lang_Class::is_primitive(h_service())) {
333 return JVMTI_ERROR_INVALID_CLASS;
334 }
335 // check impl_class
336 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
337 if (!java_lang_Class::is_instance(h_impl_class()) ||
338 java_lang_Class::is_primitive(h_impl_class())) {
339 return JVMTI_ERROR_INVALID_CLASS;
340 }
341 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
342 } /* end AddModuleProvides */
343
344 // module - pre-checked for NULL
345 // is_modifiable_class_ptr - pre-checked for NULL
346 jvmtiError
347 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
348 JavaThread* THREAD = JavaThread::current();
349
350 // check module
351 Handle h_module(THREAD, JNIHandles::resolve(module));
352 if (!java_lang_Module::is_instance(h_module())) {
353 return JVMTI_ERROR_INVALID_MODULE;
354 }
355
356 *is_modifiable_module_ptr = JNI_TRUE;
357 return JVMTI_ERROR_NONE;
358 } /* end IsModifiableModule */
359
360
361 //
362 // Class functions
363 //
364
365 // class_count_ptr - pre-checked for NULL
366 // classes_ptr - pre-checked for NULL
367 jvmtiError
368 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
369 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
370 } /* end GetLoadedClasses */
371
372
373 // initiating_loader - NULL is a valid value, must be checked
374 // class_count_ptr - pre-checked for NULL
375 // classes_ptr - pre-checked for NULL
376 jvmtiError
377 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
378 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
379 class_count_ptr, classes_ptr);
380 } /* end GetClassLoaderClasses */
381
382 // k_mirror - may be primitive, this must be checked
383 // is_modifiable_class_ptr - pre-checked for NULL
384 jvmtiError
385 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
386 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
387 JNI_TRUE : JNI_FALSE;
388 return JVMTI_ERROR_NONE;
389 } /* end IsModifiableClass */
390
391 // class_count - pre-checked to be greater than or equal to 0
392 // classes - pre-checked for NULL
393 jvmtiError
394 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
395 //TODO: add locking
396
397 int index;
398 JavaThread* current_thread = JavaThread::current();
399 ResourceMark rm(current_thread);
400
401 jvmtiClassDefinition* class_definitions =
402 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
403 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
404
405 for (index = 0; index < class_count; index++) {
406 HandleMark hm(current_thread);
407
408 jclass jcls = classes[index];
409 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
410 if (k_mirror == NULL) {
411 return JVMTI_ERROR_INVALID_CLASS;
412 }
413 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
414 return JVMTI_ERROR_INVALID_CLASS;
415 }
416
417 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
418 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
419 }
420
421 Klass* klass = java_lang_Class::as_Klass(k_mirror);
422
423 jint status = klass->jvmti_class_status();
424 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
425 return JVMTI_ERROR_INVALID_CLASS;
426 }
427
428 InstanceKlass* ik = InstanceKlass::cast(klass);
429 if (ik->get_cached_class_file_bytes() == NULL) {
430 // Not cached, we need to reconstitute the class file from the
431 // VM representation. We don't attach the reconstituted class
432 // bytes to the InstanceKlass here because they have not been
433 // validated and we're not at a safepoint.
434 JvmtiClassFileReconstituter reconstituter(ik);
435 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
436 return reconstituter.get_error();
437 }
438
439 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
440 class_definitions[index].class_bytes = (unsigned char*)
441 reconstituter.class_file_bytes();
442 } else {
443 // it is cached, get it from the cache
444 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
445 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
446 }
447 class_definitions[index].klass = jcls;
448 }
449 EventRetransformClasses event;
450 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
451 VMThread::execute(&op);
452 jvmtiError error = op.check_error();
453 if (error == JVMTI_ERROR_NONE) {
454 event.set_classCount(class_count);
455 event.set_redefinitionId(op.id());
456 event.commit();
457 }
458 return error;
459 } /* end RetransformClasses */
460
461
462 // class_count - pre-checked to be greater than or equal to 0
463 // class_definitions - pre-checked for NULL
464 jvmtiError
465 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
466 //TODO: add locking
467 EventRedefineClasses event;
468 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
469 VMThread::execute(&op);
470 jvmtiError error = op.check_error();
471 if (error == JVMTI_ERROR_NONE) {
472 event.set_classCount(class_count);
473 event.set_redefinitionId(op.id());
474 event.commit();
475 }
476 return error;
477 } /* end RedefineClasses */
478
479
480 //
481 // Object functions
482 //
483
484 // size_ptr - pre-checked for NULL
485 jvmtiError
486 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
487 oop mirror = JNIHandles::resolve_external_guard(object);
488 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
489 *size_ptr = (jlong)mirror->size() * wordSize;
490 return JVMTI_ERROR_NONE;
491 } /* end GetObjectSize */
492
493 //
494 // Method functions
495 //
496
497 // prefix - NULL is a valid value, must be checked
498 jvmtiError
499 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
500 return prefix == NULL?
501 SetNativeMethodPrefixes(0, NULL) :
502 SetNativeMethodPrefixes(1, (char**)&prefix);
503 } /* end SetNativeMethodPrefix */
504
505
506 // prefix_count - pre-checked to be greater than or equal to 0
507 // prefixes - pre-checked for NULL
508 jvmtiError
509 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
510 // Have to grab JVMTI thread state lock to be sure that some thread
511 // isn't accessing the prefixes at the same time we are setting them.
512 // No locks during VM bring-up.
513 if (Threads::number_of_threads() == 0) {
514 return set_native_method_prefixes(prefix_count, prefixes);
515 } else {
516 MutexLocker mu(JvmtiThreadState_lock);
517 return set_native_method_prefixes(prefix_count, prefixes);
518 }
519 } /* end SetNativeMethodPrefixes */
520
521 //
522 // Event Management functions
523 //
524
525 // callbacks - NULL is a valid value, must be checked
526 // size_of_callbacks - pre-checked to be greater than or equal to 0
527 jvmtiError
528 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
529 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
530 return JVMTI_ERROR_NONE;
531 } /* end SetEventCallbacks */
532
533
534 // event_thread - NULL is a valid value, must be checked
535 jvmtiError
536 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
537 if (event_thread == NULL) {
538 // Can be called at Agent_OnLoad() time with event_thread == NULL
539 // when Thread::current() does not work yet so we cannot create a
540 // ThreadsListHandle that is common to both thread-specific and
541 // global code paths.
542
543 // event_type must be valid
544 if (!JvmtiEventController::is_valid_event_type(event_type)) {
545 return JVMTI_ERROR_INVALID_EVENT_TYPE;
546 }
547
548 bool enabled = (mode == JVMTI_ENABLE);
549
550 // assure that needed capabilities are present
551 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
552 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
553 }
554
555 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
556 record_class_file_load_hook_enabled();
557 }
558
559 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
560 } else {
561 // We have a specified event_thread.
562 JavaThread* java_thread = NULL;
563 ThreadsListHandle tlh;
564 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
565 if (err != JVMTI_ERROR_NONE) {
566 return err;
567 }
568
569 // event_type must be valid
570 if (!JvmtiEventController::is_valid_event_type(event_type)) {
571 return JVMTI_ERROR_INVALID_EVENT_TYPE;
572 }
573
574 // global events cannot be controlled at thread level.
575 if (JvmtiEventController::is_global_event(event_type)) {
576 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
577 }
578
579 bool enabled = (mode == JVMTI_ENABLE);
580
581 // assure that needed capabilities are present
582 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
583 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
584 }
585
586 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
587 record_class_file_load_hook_enabled();
588 }
589 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
590 }
591
592 return JVMTI_ERROR_NONE;
593 } /* end SetEventNotificationMode */
594
595 //
596 // Capability functions
597 //
598
599 // capabilities_ptr - pre-checked for NULL
600 jvmtiError
601 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
602 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
603 get_prohibited_capabilities(),
604 capabilities_ptr);
605 return JVMTI_ERROR_NONE;
606 } /* end GetPotentialCapabilities */
607
608
609 // capabilities_ptr - pre-checked for NULL
610 jvmtiError
611 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
612 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
613 get_prohibited_capabilities(),
614 capabilities_ptr,
615 get_capabilities());
616 } /* end AddCapabilities */
617
618
619 // capabilities_ptr - pre-checked for NULL
620 jvmtiError
621 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
622 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
623 return JVMTI_ERROR_NONE;
624 } /* end RelinquishCapabilities */
625
626
627 // capabilities_ptr - pre-checked for NULL
628 jvmtiError
629 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
630 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
631 return JVMTI_ERROR_NONE;
632 } /* end GetCapabilities */
633
634 //
635 // Class Loader Search functions
636 //
637
638 // segment - pre-checked for NULL
639 jvmtiError
640 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
641 jvmtiPhase phase = get_phase();
642 if (phase == JVMTI_PHASE_ONLOAD) {
643 Arguments::append_sysclasspath(segment);
644 return JVMTI_ERROR_NONE;
645 } else if (use_version_1_0_semantics()) {
646 // This JvmtiEnv requested version 1.0 semantics and this function
647 // is only allowed in the ONLOAD phase in version 1.0 so we need to
648 // return an error here.
649 return JVMTI_ERROR_WRONG_PHASE;
650 } else if (phase == JVMTI_PHASE_LIVE) {
651 // The phase is checked by the wrapper that called this function,
652 // but this thread could be racing with the thread that is
653 // terminating the VM so we check one more time.
654
655 // create the zip entry
656 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
657 if (zip_entry == NULL) {
658 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
659 }
660
661 // lock the loader
662 Thread* thread = Thread::current();
663 HandleMark hm(thread);
664 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
665
666 ObjectLocker ol(loader_lock, thread);
667
668 // add the jar file to the bootclasspath
669 log_info(class, load)("opened: %s", zip_entry->name());
670 #if INCLUDE_CDS
671 ClassLoaderExt::append_boot_classpath(zip_entry);
672 #else
673 ClassLoader::add_to_boot_append_entries(zip_entry);
674 #endif
675 return JVMTI_ERROR_NONE;
676 } else {
677 return JVMTI_ERROR_WRONG_PHASE;
678 }
679
680 } /* end AddToBootstrapClassLoaderSearch */
681
682
683 // segment - pre-checked for NULL
684 jvmtiError
685 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
686 jvmtiPhase phase = get_phase();
687
688 if (phase == JVMTI_PHASE_ONLOAD) {
689 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
690 if (strcmp("java.class.path", p->key()) == 0) {
691 p->append_value(segment);
692 break;
693 }
694 }
695 return JVMTI_ERROR_NONE;
696 } else if (phase == JVMTI_PHASE_LIVE) {
697 // The phase is checked by the wrapper that called this function,
698 // but this thread could be racing with the thread that is
699 // terminating the VM so we check one more time.
700 Thread* THREAD = Thread::current();
701 HandleMark hm(THREAD);
702
703 // create the zip entry (which will open the zip file and hence
704 // check that the segment is indeed a zip file).
705 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
706 if (zip_entry == NULL) {
707 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
708 }
709 delete zip_entry; // no longer needed
710
711 // lock the loader
712 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
713 ObjectLocker ol(loader, THREAD);
714
715 // need the path as java.lang.String
716 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
717 if (HAS_PENDING_EXCEPTION) {
718 CLEAR_PENDING_EXCEPTION;
719 return JVMTI_ERROR_INTERNAL;
720 }
721
722 // Invoke the appendToClassPathForInstrumentation method - if the method
723 // is not found it means the loader doesn't support adding to the class path
724 // in the live phase.
725 {
726 JavaValue res(T_VOID);
727 JavaCalls::call_special(&res,
728 loader,
729 loader->klass(),
730 vmSymbols::appendToClassPathForInstrumentation_name(),
731 vmSymbols::appendToClassPathForInstrumentation_signature(),
732 path,
733 THREAD);
734 if (HAS_PENDING_EXCEPTION) {
735 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
736 CLEAR_PENDING_EXCEPTION;
737
738 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
739 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
740 } else {
741 return JVMTI_ERROR_INTERNAL;
742 }
743 }
744 }
745
746 return JVMTI_ERROR_NONE;
747 } else {
748 return JVMTI_ERROR_WRONG_PHASE;
749 }
750 } /* end AddToSystemClassLoaderSearch */
751
752 //
753 // General functions
754 //
755
756 // phase_ptr - pre-checked for NULL
757 jvmtiError
758 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
759 *phase_ptr = phase();
760 return JVMTI_ERROR_NONE;
761 } /* end GetPhase */
762
763
764 jvmtiError
765 JvmtiEnv::DisposeEnvironment() {
766 dispose();
767 return JVMTI_ERROR_NONE;
768 } /* end DisposeEnvironment */
769
770
771 // data - NULL is a valid value, must be checked
772 jvmtiError
773 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
774 set_env_local_storage(data);
775 return JVMTI_ERROR_NONE;
776 } /* end SetEnvironmentLocalStorage */
777
778
779 // data_ptr - pre-checked for NULL
780 jvmtiError
781 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
782 *data_ptr = (void*)get_env_local_storage();
783 return JVMTI_ERROR_NONE;
784 } /* end GetEnvironmentLocalStorage */
785
786 // version_ptr - pre-checked for NULL
787 jvmtiError
788 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
789 *version_ptr = JVMTI_VERSION;
790 return JVMTI_ERROR_NONE;
791 } /* end GetVersionNumber */
792
793
794 // name_ptr - pre-checked for NULL
795 jvmtiError
796 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
797 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
798 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
799 }
800 const char *name = JvmtiUtil::error_name(error);
801 if (name == NULL) {
802 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
803 }
804 size_t len = strlen(name) + 1;
805 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
806 if (err == JVMTI_ERROR_NONE) {
807 memcpy(*name_ptr, name, len);
808 }
809 return err;
810 } /* end GetErrorName */
811
812
813 jvmtiError
814 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
815 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
816 switch (flag) {
817 case JVMTI_VERBOSE_OTHER:
818 // ignore
819 break;
820 case JVMTI_VERBOSE_CLASS:
821 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
822 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
823 break;
824 case JVMTI_VERBOSE_GC:
825 LogConfiguration::configure_stdout(level, true, LOG_TAGS(gc));
826 break;
827 case JVMTI_VERBOSE_JNI:
828 level = value == 0 ? LogLevel::Off : LogLevel::Debug;
829 LogConfiguration::configure_stdout(level, true, LOG_TAGS(jni, resolve));
830 break;
831 default:
832 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
833 };
834 return JVMTI_ERROR_NONE;
835 } /* end SetVerboseFlag */
836
837
838 // format_ptr - pre-checked for NULL
839 jvmtiError
840 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
841 *format_ptr = JVMTI_JLOCATION_JVMBCI;
842 return JVMTI_ERROR_NONE;
843 } /* end GetJLocationFormat */
844
845 //
846 // Thread functions
847 //
848
849 // Threads_lock NOT held
850 // thread - NOT pre-checked
851 // thread_state_ptr - pre-checked for NULL
852 jvmtiError
853 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
854 JavaThread* current_thread = JavaThread::current();
855 JavaThread* java_thread = NULL;
856 oop thread_oop = NULL;
857 ThreadsListHandle tlh(current_thread);
858
859 if (thread == NULL) {
860 java_thread = current_thread;
861 thread_oop = java_thread->threadObj();
862
863 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
864 return JVMTI_ERROR_INVALID_THREAD;
865 }
866 } else {
867 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
868 if (err != JVMTI_ERROR_NONE) {
869 // We got an error code so we don't have a JavaThread *, but
870 // only return an error from here if we didn't get a valid
871 // thread_oop.
872 if (thread_oop == NULL) {
873 return err;
874 }
875 // We have a valid thread_oop so we can return some thread state.
876 }
877 }
878
879 // get most state bits
880 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
881
882 if (java_thread != NULL) {
883 // We have a JavaThread* so add more state bits.
884 JavaThreadState jts = java_thread->thread_state();
885
886 if (java_thread->is_being_ext_suspended()) {
887 state |= JVMTI_THREAD_STATE_SUSPENDED;
888 }
889 if (jts == _thread_in_native) {
890 state |= JVMTI_THREAD_STATE_IN_NATIVE;
891 }
892 if (java_thread->is_interrupted(false)) {
893 state |= JVMTI_THREAD_STATE_INTERRUPTED;
894 }
895 }
896
897 *thread_state_ptr = state;
898 return JVMTI_ERROR_NONE;
899 } /* end GetThreadState */
900
901
902 // thread_ptr - pre-checked for NULL
903 jvmtiError
904 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
905 JavaThread* current_thread = JavaThread::current();
906 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
907 return JVMTI_ERROR_NONE;
908 } /* end GetCurrentThread */
909
910
911 // threads_count_ptr - pre-checked for NULL
912 // threads_ptr - pre-checked for NULL
913 jvmtiError
914 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
915 int nthreads = 0;
916 Handle *thread_objs = NULL;
917 Thread* current_thread = Thread::current();
918 ResourceMark rm(current_thread);
919 HandleMark hm(current_thread);
920
921 // enumerate threads (including agent threads)
922 ThreadsListEnumerator tle(current_thread, true);
923 nthreads = tle.num_threads();
924 *threads_count_ptr = nthreads;
925
926 if (nthreads == 0) {
927 *threads_ptr = NULL;
928 return JVMTI_ERROR_NONE;
929 }
930
931 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
932 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
933
934 for (int i = 0; i < nthreads; i++) {
935 thread_objs[i] = Handle(tle.get_threadObj(i));
936 }
937
938 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
939 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
940
941 *threads_ptr = jthreads;
942 return JVMTI_ERROR_NONE;
943 } /* end GetAllThreads */
944
945
946 // Threads_lock NOT held, java_thread not protected by lock
947 // java_thread - pre-checked
948 jvmtiError
949 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
950 // don't allow hidden thread suspend request.
951 if (java_thread->is_hidden_from_external_view()) {
952 return (JVMTI_ERROR_NONE);
953 }
954
955 {
956 MutexLocker ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
957 if (java_thread->is_external_suspend()) {
958 // don't allow nested external suspend requests.
959 return (JVMTI_ERROR_THREAD_SUSPENDED);
960 }
961 if (java_thread->is_exiting()) { // thread is in the process of exiting
962 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
963 }
964 java_thread->set_external_suspend();
965 }
966
967 if (!JvmtiSuspendControl::suspend(java_thread)) {
968 // the thread was in the process of exiting
969 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
970 }
971 return JVMTI_ERROR_NONE;
972 } /* end SuspendThread */
973
974
975 // request_count - pre-checked to be greater than or equal to 0
976 // request_list - pre-checked for NULL
977 // results - pre-checked for NULL
978 jvmtiError
979 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
980 int needSafepoint = 0; // > 0 if we need a safepoint
981 ThreadsListHandle tlh;
982 for (int i = 0; i < request_count; i++) {
983 JavaThread *java_thread = NULL;
984 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
985 if (err != JVMTI_ERROR_NONE) {
986 results[i] = err;
987 continue;
988 }
989 // don't allow hidden thread suspend request.
990 if (java_thread->is_hidden_from_external_view()) {
991 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
992 continue;
993 }
994
995 {
996 MutexLocker ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
997 if (java_thread->is_external_suspend()) {
998 // don't allow nested external suspend requests.
999 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
1000 continue;
1001 }
1002 if (java_thread->is_exiting()) { // thread is in the process of exiting
1003 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1004 continue;
1005 }
1006 java_thread->set_external_suspend();
1007 }
1008 if (java_thread->thread_state() == _thread_in_native) {
1009 // We need to try and suspend native threads here. Threads in
1010 // other states will self-suspend on their next transition.
1011 if (!JvmtiSuspendControl::suspend(java_thread)) {
1012 // The thread was in the process of exiting. Force another
1013 // safepoint to make sure that this thread transitions.
1014 needSafepoint++;
1015 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1016 continue;
1017 }
1018 } else {
1019 needSafepoint++;
1020 }
1021 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1022 }
1023 if (needSafepoint > 0) {
1024 VM_ThreadsSuspendJVMTI tsj;
1025 VMThread::execute(&tsj);
1026 }
1027 // per-thread suspend results returned via results parameter
1028 return JVMTI_ERROR_NONE;
1029 } /* end SuspendThreadList */
1030
1031
1032 // Threads_lock NOT held, java_thread not protected by lock
1033 // java_thread - pre-checked
1034 jvmtiError
1035 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1036 // don't allow hidden thread resume request.
1037 if (java_thread->is_hidden_from_external_view()) {
1038 return JVMTI_ERROR_NONE;
1039 }
1040
1041 if (!java_thread->is_being_ext_suspended()) {
1042 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1043 }
1044
1045 if (!JvmtiSuspendControl::resume(java_thread)) {
1046 return JVMTI_ERROR_INTERNAL;
1047 }
1048 return JVMTI_ERROR_NONE;
1049 } /* end ResumeThread */
1050
1051
1052 // request_count - pre-checked to be greater than or equal to 0
1053 // request_list - pre-checked for NULL
1054 // results - pre-checked for NULL
1055 jvmtiError
1056 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1057 ThreadsListHandle tlh;
1058 for (int i = 0; i < request_count; i++) {
1059 JavaThread* java_thread = NULL;
1060 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1061 if (err != JVMTI_ERROR_NONE) {
1062 results[i] = err;
1063 continue;
1064 }
1065 // don't allow hidden thread resume request.
1066 if (java_thread->is_hidden_from_external_view()) {
1067 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1068 continue;
1069 }
1070 if (!java_thread->is_being_ext_suspended()) {
1071 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1072 continue;
1073 }
1074
1075 if (!JvmtiSuspendControl::resume(java_thread)) {
1076 results[i] = JVMTI_ERROR_INTERNAL;
1077 continue;
1078 }
1079
1080 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1081 }
1082 // per-thread resume results returned via results parameter
1083 return JVMTI_ERROR_NONE;
1084 } /* end ResumeThreadList */
1085
1086
1087 // Threads_lock NOT held, java_thread not protected by lock
1088 // java_thread - pre-checked
1089 jvmtiError
1090 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1091 oop e = JNIHandles::resolve_external_guard(exception);
1092 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1093
1094 JavaThread::send_async_exception(java_thread->threadObj(), e);
1095
1096 return JVMTI_ERROR_NONE;
1097
1098 } /* end StopThread */
1099
1100
1101 // Threads_lock NOT held
1102 // thread - NOT pre-checked
1103 jvmtiError
1104 JvmtiEnv::InterruptThread(jthread thread) {
1105 JavaThread* current_thread = JavaThread::current();
1106 JavaThread* java_thread = NULL;
1107 ThreadsListHandle tlh(current_thread);
1108 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1109 if (err != JVMTI_ERROR_NONE) {
1110 return err;
1111 }
1112 // Really this should be a Java call to Thread.interrupt to ensure the same
1113 // semantics, however historically this has not been done for some reason.
1114 // So we continue with that (which means we don't interact with any Java-level
1115 // Interruptible object) but we must set the Java-level interrupted state.
1116 java_lang_Thread::set_interrupted(JNIHandles::resolve(thread), true);
1117 java_thread->interrupt();
1118
1119 return JVMTI_ERROR_NONE;
1120 } /* end InterruptThread */
1121
1122
1123 // Threads_lock NOT held
1124 // thread - NOT pre-checked
1125 // info_ptr - pre-checked for NULL
1126 jvmtiError
1127 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1128 JavaThread* current_thread = JavaThread::current();
1129 ResourceMark rm(current_thread);
1130 HandleMark hm(current_thread);
1131
1132 ThreadsListHandle tlh(current_thread);
1133
1134 // if thread is NULL the current thread is used
1135 oop thread_oop = NULL;
1136 if (thread == NULL) {
1137 thread_oop = current_thread->threadObj();
1138 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1139 return JVMTI_ERROR_INVALID_THREAD;
1140 }
1141 } else {
1142 JavaThread* java_thread = NULL;
1143 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1144 if (err != JVMTI_ERROR_NONE) {
1145 // We got an error code so we don't have a JavaThread *, but
1146 // only return an error from here if we didn't get a valid
1147 // thread_oop.
1148 if (thread_oop == NULL) {
1149 return err;
1150 }
1151 // We have a valid thread_oop so we can return some thread info.
1152 }
1153 }
1154
1155 Handle thread_obj(current_thread, thread_oop);
1156 Handle name;
1157 ThreadPriority priority;
1158 Handle thread_group;
1159 Handle context_class_loader;
1160 bool is_daemon;
1161
1162 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1163 priority = java_lang_Thread::priority(thread_obj());
1164 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1165 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1166
1167 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1168 context_class_loader = Handle(current_thread, loader);
1169
1170 { const char *n;
1171
1172 if (name() != NULL) {
1173 n = java_lang_String::as_utf8_string(name());
1174 } else {
1175 int utf8_length = 0;
1176 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1177 }
1178
1179 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1180 if (info_ptr->name == NULL)
1181 return JVMTI_ERROR_OUT_OF_MEMORY;
1182
1183 strcpy(info_ptr->name, n);
1184 }
1185 info_ptr->is_daemon = is_daemon;
1186 info_ptr->priority = priority;
1187
1188 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1189 jni_reference(context_class_loader);
1190 info_ptr->thread_group = jni_reference(thread_group);
1191
1192 return JVMTI_ERROR_NONE;
1193 } /* end GetThreadInfo */
1194
1195
1196 // Threads_lock NOT held, java_thread not protected by lock
1197 // java_thread - pre-checked
1198 // owned_monitor_count_ptr - pre-checked for NULL
1199 // owned_monitors_ptr - pre-checked for NULL
1200 jvmtiError
1201 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1202 jvmtiError err = JVMTI_ERROR_NONE;
1203 JavaThread* calling_thread = JavaThread::current();
1204
1205 // growable array of jvmti monitors info on the C-heap
1206 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1207 new (ResourceObj::C_HEAP, mtServiceability) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, mtServiceability);
1208
1209 // It is only safe to perform the direct operation on the current
1210 // thread. All other usage needs to use a direct handshake for safety.
1211 if (java_thread == calling_thread) {
1212 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1213 } else {
1214 // get owned monitors info with handshake
1215 GetOwnedMonitorInfoClosure op(calling_thread, this, owned_monitors_list);
1216 bool executed = Handshake::execute_direct(&op, java_thread);
1217 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1218 }
1219 jint owned_monitor_count = owned_monitors_list->length();
1220 if (err == JVMTI_ERROR_NONE) {
1221 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1222 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1223 // copy into the returned array
1224 for (int i = 0; i < owned_monitor_count; i++) {
1225 (*owned_monitors_ptr)[i] =
1226 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1227 }
1228 *owned_monitor_count_ptr = owned_monitor_count;
1229 }
1230 }
1231 // clean up.
1232 for (int i = 0; i < owned_monitor_count; i++) {
1233 deallocate((unsigned char*)owned_monitors_list->at(i));
1234 }
1235 delete owned_monitors_list;
1236
1237 return err;
1238 } /* end GetOwnedMonitorInfo */
1239
1240
1241 // Threads_lock NOT held, java_thread not protected by lock
1242 // java_thread - pre-checked
1243 // monitor_info_count_ptr - pre-checked for NULL
1244 // monitor_info_ptr - pre-checked for NULL
1245 jvmtiError
1246 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1247 jvmtiError err = JVMTI_ERROR_NONE;
1248 JavaThread* calling_thread = JavaThread::current();
1249
1250 // growable array of jvmti monitors info on the C-heap
1251 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1252 new (ResourceObj::C_HEAP, mtServiceability) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, mtServiceability);
1253
1254 // It is only safe to perform the direct operation on the current
1255 // thread. All other usage needs to use a direct handshake for safety.
1256 if (java_thread == calling_thread) {
1257 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1258 } else {
1259 // get owned monitors info with handshake
1260 GetOwnedMonitorInfoClosure op(calling_thread, this, owned_monitors_list);
1261 bool executed = Handshake::execute_direct(&op, java_thread);
1262 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1263 }
1264
1265 jint owned_monitor_count = owned_monitors_list->length();
1266 if (err == JVMTI_ERROR_NONE) {
1267 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1268 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1269 // copy to output array.
1270 for (int i = 0; i < owned_monitor_count; i++) {
1271 (*monitor_info_ptr)[i].monitor =
1272 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1273 (*monitor_info_ptr)[i].stack_depth =
1274 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1275 }
1276 }
1277 *monitor_info_count_ptr = owned_monitor_count;
1278 }
1279
1280 // clean up.
1281 for (int i = 0; i < owned_monitor_count; i++) {
1282 deallocate((unsigned char*)owned_monitors_list->at(i));
1283 }
1284 delete owned_monitors_list;
1285
1286 return err;
1287 } /* end GetOwnedMonitorStackDepthInfo */
1288
1289
1290 // Threads_lock NOT held, java_thread not protected by lock
1291 // java_thread - pre-checked
1292 // monitor_ptr - pre-checked for NULL
1293 jvmtiError
1294 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1295 jvmtiError err = JVMTI_ERROR_NONE;
1296 JavaThread* calling_thread = JavaThread::current();
1297
1298 // It is only safe to perform the direct operation on the current
1299 // thread. All other usage needs to use a direct handshake for safety.
1300 if (java_thread == calling_thread) {
1301 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1302 } else {
1303 // get contended monitor information with handshake
1304 GetCurrentContendedMonitorClosure op(calling_thread, this, monitor_ptr);
1305 bool executed = Handshake::execute_direct(&op, java_thread);
1306 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1307 }
1308 return err;
1309 } /* end GetCurrentContendedMonitor */
1310
1311
1312 // Threads_lock NOT held
1313 // thread - NOT pre-checked
1314 // proc - pre-checked for NULL
1315 // arg - NULL is a valid value, must be checked
1316 jvmtiError
1317 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1318 JavaThread* current_thread = JavaThread::current();
1319
1320 JavaThread* java_thread = NULL;
1321 oop thread_oop = NULL;
1322 ThreadsListHandle tlh(current_thread);
1323 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1324 if (err != JVMTI_ERROR_NONE) {
1325 // We got an error code so we don't have a JavaThread *, but
1326 // only return an error from here if we didn't get a valid
1327 // thread_oop.
1328 if (thread_oop == NULL) {
1329 return err;
1330 }
1331 // We have a valid thread_oop.
1332 }
1333
1334 if (java_thread != NULL) {
1335 // 'thread' refers to an existing JavaThread.
1336 return JVMTI_ERROR_INVALID_THREAD;
1337 }
1338
1339 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1340 return JVMTI_ERROR_INVALID_PRIORITY;
1341 }
1342
1343 Handle thread_hndl(current_thread, thread_oop);
1344 {
1345 MutexLocker mu(current_thread, Threads_lock); // grab Threads_lock
1346
1347 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1348
1349 // At this point it may be possible that no osthread was created for the
1350 // JavaThread due to lack of memory.
1351 if (new_thread == NULL || new_thread->osthread() == NULL) {
1352 if (new_thread != NULL) {
1353 new_thread->smr_delete();
1354 }
1355 return JVMTI_ERROR_OUT_OF_MEMORY;
1356 }
1357
1358 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1359 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1360 java_lang_Thread::set_daemon(thread_hndl());
1361
1362 new_thread->set_threadObj(thread_hndl());
1363 Threads::add(new_thread);
1364 Thread::start(new_thread);
1365 } // unlock Threads_lock
1366
1367 return JVMTI_ERROR_NONE;
1368 } /* end RunAgentThread */
1369
1370 //
1371 // Thread Group functions
1372 //
1373
1374 // group_count_ptr - pre-checked for NULL
1375 // groups_ptr - pre-checked for NULL
1376 jvmtiError
1377 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1378 JavaThread* current_thread = JavaThread::current();
1379
1380 // Only one top level thread group now.
1381 *group_count_ptr = 1;
1382
1383 // Allocate memory to store global-refs to the thread groups.
1384 // Assume this area is freed by caller.
1385 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1386
1387 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1388
1389 // Convert oop to Handle, then convert Handle to global-ref.
1390 {
1391 HandleMark hm(current_thread);
1392 Handle system_thread_group(current_thread, Universe::system_thread_group());
1393 *groups_ptr[0] = jni_reference(system_thread_group);
1394 }
1395
1396 return JVMTI_ERROR_NONE;
1397 } /* end GetTopThreadGroups */
1398
1399
1400 // info_ptr - pre-checked for NULL
1401 jvmtiError
1402 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1403 Thread* current_thread = Thread::current();
1404 ResourceMark rm(current_thread);
1405 HandleMark hm(current_thread);
1406
1407 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1408 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1409
1410 const char* name;
1411 Handle parent_group;
1412 bool is_daemon;
1413 ThreadPriority max_priority;
1414
1415 name = java_lang_ThreadGroup::name(group_obj());
1416 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1417 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1418 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1419
1420 info_ptr->is_daemon = is_daemon;
1421 info_ptr->max_priority = max_priority;
1422 info_ptr->parent = jni_reference(parent_group);
1423
1424 if (name != NULL) {
1425 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1426 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1427 strcpy(info_ptr->name, name);
1428 } else {
1429 info_ptr->name = NULL;
1430 }
1431
1432 return JVMTI_ERROR_NONE;
1433 } /* end GetThreadGroupInfo */
1434
1435
1436 // thread_count_ptr - pre-checked for NULL
1437 // threads_ptr - pre-checked for NULL
1438 // group_count_ptr - pre-checked for NULL
1439 // groups_ptr - pre-checked for NULL
1440 jvmtiError
1441 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1442 JavaThread* current_thread = JavaThread::current();
1443 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1444 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1445
1446 Handle *thread_objs = NULL;
1447 Handle *group_objs = NULL;
1448 int nthreads = 0;
1449 int ngroups = 0;
1450 int hidden_threads = 0;
1451
1452 ResourceMark rm(current_thread);
1453 HandleMark hm(current_thread);
1454
1455 Handle group_hdl(current_thread, group_obj);
1456
1457 { // Cannot allow thread or group counts to change.
1458 ObjectLocker ol(group_hdl, current_thread);
1459
1460 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1461 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1462
1463 if (nthreads > 0) {
1464 ThreadsListHandle tlh(current_thread);
1465 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1466 assert(nthreads <= threads->length(), "too many threads");
1467 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1468 for (int i = 0, j = 0; i < nthreads; i++) {
1469 oop thread_obj = threads->obj_at(i);
1470 assert(thread_obj != NULL, "thread_obj is NULL");
1471 JavaThread *java_thread = NULL;
1472 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1473 if (err == JVMTI_ERROR_NONE) {
1474 // Have a valid JavaThread*.
1475 if (java_thread->is_hidden_from_external_view()) {
1476 // Filter out hidden java threads.
1477 hidden_threads++;
1478 continue;
1479 }
1480 } else {
1481 // We couldn't convert thread_obj into a JavaThread*.
1482 if (err == JVMTI_ERROR_INVALID_THREAD) {
1483 // The thread_obj does not refer to a java.lang.Thread object
1484 // so skip it.
1485 hidden_threads++;
1486 continue;
1487 }
1488 // We have a valid thread_obj, but no JavaThread*; the caller
1489 // can still have limited use for the thread_obj.
1490 }
1491 thread_objs[j++] = Handle(current_thread, thread_obj);
1492 }
1493 nthreads -= hidden_threads;
1494 } // ThreadsListHandle is destroyed here.
1495
1496 if (ngroups > 0) {
1497 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1498 assert(ngroups <= groups->length(), "too many groups");
1499 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1500 for (int i = 0; i < ngroups; i++) {
1501 oop group_obj = groups->obj_at(i);
1502 assert(group_obj != NULL, "group_obj != NULL");
1503 group_objs[i] = Handle(current_thread, group_obj);
1504 }
1505 }
1506 } // ThreadGroup unlocked here
1507
1508 *group_count_ptr = ngroups;
1509 *thread_count_ptr = nthreads;
1510 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1511 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1512 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1513 return JVMTI_ERROR_OUT_OF_MEMORY;
1514 }
1515 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1516 return JVMTI_ERROR_OUT_OF_MEMORY;
1517 }
1518
1519 return JVMTI_ERROR_NONE;
1520 } /* end GetThreadGroupChildren */
1521
1522
1523 //
1524 // Stack Frame functions
1525 //
1526
1527 // Threads_lock NOT held, java_thread not protected by lock
1528 // java_thread - pre-checked
1529 // max_frame_count - pre-checked to be greater than or equal to 0
1530 // frame_buffer - pre-checked for NULL
1531 // count_ptr - pre-checked for NULL
1532 jvmtiError
1533 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1534 jvmtiError err = JVMTI_ERROR_NONE;
1535
1536 // It is only safe to perform the direct operation on the current
1537 // thread. All other usage needs to use a direct handshake for safety.
1538 if (java_thread == JavaThread::current()) {
1539 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1540 } else {
1541 // Get stack trace with handshake.
1542 GetStackTraceClosure op(this, start_depth, max_frame_count, frame_buffer, count_ptr);
1543 bool executed = Handshake::execute_direct(&op, java_thread);
1544 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1545 }
1546
1547 return err;
1548 } /* end GetStackTrace */
1549
1550
1551 // max_frame_count - pre-checked to be greater than or equal to 0
1552 // stack_info_ptr - pre-checked for NULL
1553 // thread_count_ptr - pre-checked for NULL
1554 jvmtiError
1555 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1556 jvmtiError err = JVMTI_ERROR_NONE;
1557 JavaThread* calling_thread = JavaThread::current();
1558
1559 // JVMTI get stack traces at safepoint.
1560 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1561 VMThread::execute(&op);
1562 *thread_count_ptr = op.final_thread_count();
1563 *stack_info_ptr = op.stack_info();
1564 err = op.result();
1565 return err;
1566 } /* end GetAllStackTraces */
1567
1568
1569 // thread_count - pre-checked to be greater than or equal to 0
1570 // thread_list - pre-checked for NULL
1571 // max_frame_count - pre-checked to be greater than or equal to 0
1572 // stack_info_ptr - pre-checked for NULL
1573 jvmtiError
1574 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1575 jvmtiError err = JVMTI_ERROR_NONE;
1576
1577 if (thread_count == 1) {
1578 // Use direct handshake if we need to get only one stack trace.
1579 JavaThread *current_thread = JavaThread::current();
1580 ThreadsListHandle tlh(current_thread);
1581 JavaThread *java_thread;
1582 err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), *thread_list, &java_thread, NULL);
1583 if (err != JVMTI_ERROR_NONE) {
1584 return err;
1585 }
1586
1587 GetSingleStackTraceClosure op(this, current_thread, *thread_list, max_frame_count);
1588 bool executed = Handshake::execute_direct(&op, java_thread);
1589 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1590 if (err == JVMTI_ERROR_NONE) {
1591 *stack_info_ptr = op.stack_info();
1592 }
1593 } else {
1594 // JVMTI get stack traces at safepoint.
1595 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1596 VMThread::execute(&op);
1597 err = op.result();
1598 if (err == JVMTI_ERROR_NONE) {
1599 *stack_info_ptr = op.stack_info();
1600 }
1601 }
1602 return err;
1603 } /* end GetThreadListStackTraces */
1604
1605
1606 // Threads_lock NOT held, java_thread not protected by lock
1607 // java_thread - pre-checked
1608 // count_ptr - pre-checked for NULL
1609 jvmtiError
1610 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1611 jvmtiError err = JVMTI_ERROR_NONE;
1612
1613 // retrieve or create JvmtiThreadState.
1614 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1615 if (state == NULL) {
1616 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1617 }
1618
1619 // It is only safe to perform the direct operation on the current
1620 // thread. All other usage needs to use a direct handshake for safety.
1621 if (java_thread == JavaThread::current()) {
1622 err = get_frame_count(state, count_ptr);
1623 } else {
1624 // get java stack frame count with handshake.
1625 GetFrameCountClosure op(this, state, count_ptr);
1626 bool executed = Handshake::execute_direct(&op, java_thread);
1627 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1628 }
1629 return err;
1630 } /* end GetFrameCount */
1631
1632
1633 // Threads_lock NOT held, java_thread not protected by lock
1634 // java_thread - pre-checked
1635 jvmtiError
1636 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1637 JavaThread* current_thread = JavaThread::current();
1638 HandleMark hm(current_thread);
1639 uint32_t debug_bits = 0;
1640
1641 // retrieve or create the state
1642 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1643 if (state == NULL) {
1644 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1645 }
1646
1647 // Check if java_thread is fully suspended
1648 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1649 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1650 }
1651 // Check to see if a PopFrame was already in progress
1652 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1653 // Probably possible for JVMTI clients to trigger this, but the
1654 // JPDA backend shouldn't allow this to happen
1655 return JVMTI_ERROR_INTERNAL;
1656 }
1657
1658 {
1659 // Was workaround bug
1660 // 4812902: popFrame hangs if the method is waiting at a synchronize
1661 // Catch this condition and return an error to avoid hanging.
1662 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1663 OSThread* osThread = java_thread->osthread();
1664 if (osThread->get_state() == MONITOR_WAIT) {
1665 return JVMTI_ERROR_OPAQUE_FRAME;
1666 }
1667 }
1668
1669 {
1670 ResourceMark rm(current_thread);
1671 // Check if there are more than one Java frame in this thread, that the top two frames
1672 // are Java (not native) frames, and that there is no intervening VM frame
1673 int frame_count = 0;
1674 bool is_interpreted[2];
1675 intptr_t *frame_sp[2];
1676 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1677 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1678 methodHandle mh(current_thread, vfs.method());
1679 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1680 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1681 frame_sp[frame_count] = vfs.frame_id();
1682 if (++frame_count > 1) break;
1683 }
1684 if (frame_count < 2) {
1685 // We haven't found two adjacent non-native Java frames on the top.
1686 // There can be two situations here:
1687 // 1. There are no more java frames
1688 // 2. Two top java frames are separated by non-java native frames
1689 if(vframeFor(java_thread, 1) == NULL) {
1690 return JVMTI_ERROR_NO_MORE_FRAMES;
1691 } else {
1692 // Intervening non-java native or VM frames separate java frames.
1693 // Current implementation does not support this. See bug #5031735.
1694 // In theory it is possible to pop frames in such cases.
1695 return JVMTI_ERROR_OPAQUE_FRAME;
1696 }
1697 }
1698
1699 // If any of the top 2 frames is a compiled one, need to deoptimize it
1700 for (int i = 0; i < 2; i++) {
1701 if (!is_interpreted[i]) {
1702 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1703 }
1704 }
1705
1706 // Update the thread state to reflect that the top frame is popped
1707 // so that cur_stack_depth is maintained properly and all frameIDs
1708 // are invalidated.
1709 // The current frame will be popped later when the suspended thread
1710 // is resumed and right before returning from VM to Java.
1711 // (see call_VM_base() in assembler_<cpu>.cpp).
1712
1713 // It's fine to update the thread state here because no JVMTI events
1714 // shall be posted for this PopFrame.
1715
1716 // It is only safe to perform the direct operation on the current
1717 // thread. All other usage needs to use a vm-safepoint-op for safety.
1718 if (java_thread == JavaThread::current()) {
1719 state->update_for_pop_top_frame();
1720 } else {
1721 VM_UpdateForPopTopFrame op(state);
1722 VMThread::execute(&op);
1723 jvmtiError err = op.result();
1724 if (err != JVMTI_ERROR_NONE) {
1725 return err;
1726 }
1727 }
1728
1729 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1730 // Set pending step flag for this popframe and it is cleared when next
1731 // step event is posted.
1732 state->set_pending_step_for_popframe();
1733 }
1734
1735 return JVMTI_ERROR_NONE;
1736 } /* end PopFrame */
1737
1738
1739 // Threads_lock NOT held, java_thread not protected by lock
1740 // java_thread - pre-checked
1741 // java_thread - unchecked
1742 // depth - pre-checked as non-negative
1743 // method_ptr - pre-checked for NULL
1744 // location_ptr - pre-checked for NULL
1745 jvmtiError
1746 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1747 jvmtiError err = JVMTI_ERROR_NONE;
1748
1749 // It is only safe to perform the direct operation on the current
1750 // thread. All other usage needs to use a direct handshake for safety.
1751 if (java_thread == JavaThread::current()) {
1752 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1753 } else {
1754 // JVMTI get java stack frame location via direct handshake.
1755 GetFrameLocationClosure op(this, depth, method_ptr, location_ptr);
1756 bool executed = Handshake::execute_direct(&op, java_thread);
1757 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1758 }
1759 return err;
1760 } /* end GetFrameLocation */
1761
1762
1763 // Threads_lock NOT held, java_thread not protected by lock
1764 // java_thread - pre-checked
1765 // java_thread - unchecked
1766 // depth - pre-checked as non-negative
1767 jvmtiError
1768 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1769 jvmtiError err = JVMTI_ERROR_NONE;
1770 ResourceMark rm;
1771 uint32_t debug_bits = 0;
1772
1773 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1774 if (state == NULL) {
1775 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1776 }
1777
1778 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1779 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1780 }
1781
1782 if (TraceJVMTICalls) {
1783 JvmtiSuspendControl::print();
1784 }
1785
1786 vframe *vf = vframeFor(java_thread, depth);
1787 if (vf == NULL) {
1788 return JVMTI_ERROR_NO_MORE_FRAMES;
1789 }
1790
1791 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1792 return JVMTI_ERROR_OPAQUE_FRAME;
1793 }
1794
1795 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1796
1797 // It is only safe to perform the direct operation on the current
1798 // thread. All other usage needs to use a vm-safepoint-op for safety.
1799 if (java_thread == JavaThread::current()) {
1800 int frame_number = state->count_frames() - depth;
1801 state->env_thread_state(this)->set_frame_pop(frame_number);
1802 } else {
1803 VM_SetFramePop op(this, state, depth);
1804 VMThread::execute(&op);
1805 err = op.result();
1806 }
1807 return err;
1808 } /* end NotifyFramePop */
1809
1810
1811 //
1812 // Force Early Return functions
1813 //
1814
1815 // Threads_lock NOT held, java_thread not protected by lock
1816 // java_thread - pre-checked
1817 jvmtiError
1818 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1819 jvalue val;
1820 val.l = value;
1821 return force_early_return(java_thread, val, atos);
1822 } /* end ForceEarlyReturnObject */
1823
1824
1825 // Threads_lock NOT held, java_thread not protected by lock
1826 // java_thread - pre-checked
1827 jvmtiError
1828 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1829 jvalue val;
1830 val.i = value;
1831 return force_early_return(java_thread, val, itos);
1832 } /* end ForceEarlyReturnInt */
1833
1834
1835 // Threads_lock NOT held, java_thread not protected by lock
1836 // java_thread - pre-checked
1837 jvmtiError
1838 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1839 jvalue val;
1840 val.j = value;
1841 return force_early_return(java_thread, val, ltos);
1842 } /* end ForceEarlyReturnLong */
1843
1844
1845 // Threads_lock NOT held, java_thread not protected by lock
1846 // java_thread - pre-checked
1847 jvmtiError
1848 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1849 jvalue val;
1850 val.f = value;
1851 return force_early_return(java_thread, val, ftos);
1852 } /* end ForceEarlyReturnFloat */
1853
1854
1855 // Threads_lock NOT held, java_thread not protected by lock
1856 // java_thread - pre-checked
1857 jvmtiError
1858 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1859 jvalue val;
1860 val.d = value;
1861 return force_early_return(java_thread, val, dtos);
1862 } /* end ForceEarlyReturnDouble */
1863
1864
1865 // Threads_lock NOT held, java_thread not protected by lock
1866 // java_thread - pre-checked
1867 jvmtiError
1868 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1869 jvalue val;
1870 val.j = 0L;
1871 return force_early_return(java_thread, val, vtos);
1872 } /* end ForceEarlyReturnVoid */
1873
1874
1875 //
1876 // Heap functions
1877 //
1878
1879 // klass - NULL is a valid value, must be checked
1880 // initial_object - NULL is a valid value, must be checked
1881 // callbacks - pre-checked for NULL
1882 // user_data - NULL is a valid value, must be checked
1883 jvmtiError
1884 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1885 // check klass if provided
1886 Klass* k = NULL;
1887 if (klass != NULL) {
1888 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1889 if (k_mirror == NULL) {
1890 return JVMTI_ERROR_INVALID_CLASS;
1891 }
1892 if (java_lang_Class::is_primitive(k_mirror)) {
1893 return JVMTI_ERROR_NONE;
1894 }
1895 k = java_lang_Class::as_Klass(k_mirror);
1896 if (klass == NULL) {
1897 return JVMTI_ERROR_INVALID_CLASS;
1898 }
1899 }
1900
1901 if (initial_object != NULL) {
1902 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1903 if (init_obj == NULL) {
1904 return JVMTI_ERROR_INVALID_OBJECT;
1905 }
1906 }
1907
1908 Thread *thread = Thread::current();
1909 HandleMark hm(thread);
1910
1911 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1912 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1913 return JVMTI_ERROR_NONE;
1914 } /* end FollowReferences */
1915
1916
1917 // klass - NULL is a valid value, must be checked
1918 // callbacks - pre-checked for NULL
1919 // user_data - NULL is a valid value, must be checked
1920 jvmtiError
1921 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1922 // check klass if provided
1923 Klass* k = NULL;
1924 if (klass != NULL) {
1925 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1926 if (k_mirror == NULL) {
1927 return JVMTI_ERROR_INVALID_CLASS;
1928 }
1929 if (java_lang_Class::is_primitive(k_mirror)) {
1930 return JVMTI_ERROR_NONE;
1931 }
1932 k = java_lang_Class::as_Klass(k_mirror);
1933 if (k == NULL) {
1934 return JVMTI_ERROR_INVALID_CLASS;
1935 }
1936 }
1937
1938 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1939 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1940 return JVMTI_ERROR_NONE;
1941 } /* end IterateThroughHeap */
1942
1943
1944 // tag_ptr - pre-checked for NULL
1945 jvmtiError
1946 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1947 oop o = JNIHandles::resolve_external_guard(object);
1948 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1949 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1950 return JVMTI_ERROR_NONE;
1951 } /* end GetTag */
1952
1953
1954 jvmtiError
1955 JvmtiEnv::SetTag(jobject object, jlong tag) {
1956 oop o = JNIHandles::resolve_external_guard(object);
1957 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1958 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1959 return JVMTI_ERROR_NONE;
1960 } /* end SetTag */
1961
1962
1963 // tag_count - pre-checked to be greater than or equal to 0
1964 // tags - pre-checked for NULL
1965 // count_ptr - pre-checked for NULL
1966 // object_result_ptr - NULL is a valid value, must be checked
1967 // tag_result_ptr - NULL is a valid value, must be checked
1968 jvmtiError
1969 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1970 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1971 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1972 } /* end GetObjectsWithTags */
1973
1974
1975 jvmtiError
1976 JvmtiEnv::ForceGarbageCollection() {
1977 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1978 return JVMTI_ERROR_NONE;
1979 } /* end ForceGarbageCollection */
1980
1981
1982 //
1983 // Heap (1.0) functions
1984 //
1985
1986 // object_reference_callback - pre-checked for NULL
1987 // user_data - NULL is a valid value, must be checked
1988 jvmtiError
1989 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1990 oop o = JNIHandles::resolve_external_guard(object);
1991 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1992 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1993 return JVMTI_ERROR_NONE;
1994 } /* end IterateOverObjectsReachableFromObject */
1995
1996
1997 // heap_root_callback - NULL is a valid value, must be checked
1998 // stack_ref_callback - NULL is a valid value, must be checked
1999 // object_ref_callback - NULL is a valid value, must be checked
2000 // user_data - NULL is a valid value, must be checked
2001 jvmtiError
2002 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
2003 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
2004 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
2005 return JVMTI_ERROR_NONE;
2006 } /* end IterateOverReachableObjects */
2007
2008
2009 // heap_object_callback - pre-checked for NULL
2010 // user_data - NULL is a valid value, must be checked
2011 jvmtiError
2012 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2013 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
2014 Thread *thread = Thread::current();
2015 HandleMark hm(thread);
2016 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
2017 return JVMTI_ERROR_NONE;
2018 } /* end IterateOverHeap */
2019
2020
2021 // k_mirror - may be primitive, this must be checked
2022 // heap_object_callback - pre-checked for NULL
2023 // user_data - NULL is a valid value, must be checked
2024 jvmtiError
2025 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2026 if (java_lang_Class::is_primitive(k_mirror)) {
2027 // DO PRIMITIVE CLASS PROCESSING
2028 return JVMTI_ERROR_NONE;
2029 }
2030 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2031 if (klass == NULL) {
2032 return JVMTI_ERROR_INVALID_CLASS;
2033 }
2034 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2035 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2036 return JVMTI_ERROR_NONE;
2037 } /* end IterateOverInstancesOfClass */
2038
2039
2040 //
2041 // Local Variable functions
2042 //
2043
2044 // Threads_lock NOT held, java_thread not protected by lock
2045 // java_thread - pre-checked
2046 // java_thread - unchecked
2047 // depth - pre-checked as non-negative
2048 // value_ptr - pre-checked for NULL
2049 jvmtiError
2050 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2051 JavaThread* current_thread = JavaThread::current();
2052 // rm object is created to clean up the javaVFrame created in
2053 // doit_prologue(), but after doit() is finished with it.
2054 ResourceMark rm(current_thread);
2055
2056 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2057 VMThread::execute(&op);
2058 jvmtiError err = op.result();
2059 if (err != JVMTI_ERROR_NONE) {
2060 return err;
2061 } else {
2062 *value_ptr = op.value().l;
2063 return JVMTI_ERROR_NONE;
2064 }
2065 } /* end GetLocalObject */
2066
2067 // Threads_lock NOT held, java_thread not protected by lock
2068 // java_thread - pre-checked
2069 // java_thread - unchecked
2070 // depth - pre-checked as non-negative
2071 // value - pre-checked for NULL
2072 jvmtiError
2073 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2074 JavaThread* current_thread = JavaThread::current();
2075 // rm object is created to clean up the javaVFrame created in
2076 // doit_prologue(), but after doit() is finished with it.
2077 ResourceMark rm(current_thread);
2078
2079 VM_GetReceiver op(java_thread, current_thread, depth);
2080 VMThread::execute(&op);
2081 jvmtiError err = op.result();
2082 if (err != JVMTI_ERROR_NONE) {
2083 return err;
2084 } else {
2085 *value_ptr = op.value().l;
2086 return JVMTI_ERROR_NONE;
2087 }
2088 } /* end GetLocalInstance */
2089
2090
2091 // Threads_lock NOT held, java_thread not protected by lock
2092 // java_thread - pre-checked
2093 // java_thread - unchecked
2094 // depth - pre-checked as non-negative
2095 // value_ptr - pre-checked for NULL
2096 jvmtiError
2097 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2098 // rm object is created to clean up the javaVFrame created in
2099 // doit_prologue(), but after doit() is finished with it.
2100 ResourceMark rm;
2101
2102 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2103 VMThread::execute(&op);
2104 *value_ptr = op.value().i;
2105 return op.result();
2106 } /* end GetLocalInt */
2107
2108
2109 // Threads_lock NOT held, java_thread not protected by lock
2110 // java_thread - pre-checked
2111 // java_thread - unchecked
2112 // depth - pre-checked as non-negative
2113 // value_ptr - pre-checked for NULL
2114 jvmtiError
2115 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2116 // rm object is created to clean up the javaVFrame created in
2117 // doit_prologue(), but after doit() is finished with it.
2118 ResourceMark rm;
2119
2120 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2121 VMThread::execute(&op);
2122 *value_ptr = op.value().j;
2123 return op.result();
2124 } /* end GetLocalLong */
2125
2126
2127 // Threads_lock NOT held, java_thread not protected by lock
2128 // java_thread - pre-checked
2129 // java_thread - unchecked
2130 // depth - pre-checked as non-negative
2131 // value_ptr - pre-checked for NULL
2132 jvmtiError
2133 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2134 // rm object is created to clean up the javaVFrame created in
2135 // doit_prologue(), but after doit() is finished with it.
2136 ResourceMark rm;
2137
2138 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2139 VMThread::execute(&op);
2140 *value_ptr = op.value().f;
2141 return op.result();
2142 } /* end GetLocalFloat */
2143
2144
2145 // Threads_lock NOT held, java_thread not protected by lock
2146 // java_thread - pre-checked
2147 // java_thread - unchecked
2148 // depth - pre-checked as non-negative
2149 // value_ptr - pre-checked for NULL
2150 jvmtiError
2151 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2152 // rm object is created to clean up the javaVFrame created in
2153 // doit_prologue(), but after doit() is finished with it.
2154 ResourceMark rm;
2155
2156 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2157 VMThread::execute(&op);
2158 *value_ptr = op.value().d;
2159 return op.result();
2160 } /* end GetLocalDouble */
2161
2162
2163 // Threads_lock NOT held, java_thread not protected by lock
2164 // java_thread - pre-checked
2165 // java_thread - unchecked
2166 // depth - pre-checked as non-negative
2167 jvmtiError
2168 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2169 // rm object is created to clean up the javaVFrame created in
2170 // doit_prologue(), but after doit() is finished with it.
2171 ResourceMark rm;
2172 jvalue val;
2173 val.l = value;
2174 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2175 VMThread::execute(&op);
2176 return op.result();
2177 } /* end SetLocalObject */
2178
2179
2180 // Threads_lock NOT held, java_thread not protected by lock
2181 // java_thread - pre-checked
2182 // java_thread - unchecked
2183 // depth - pre-checked as non-negative
2184 jvmtiError
2185 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2186 // rm object is created to clean up the javaVFrame created in
2187 // doit_prologue(), but after doit() is finished with it.
2188 ResourceMark rm;
2189 jvalue val;
2190 val.i = value;
2191 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2192 VMThread::execute(&op);
2193 return op.result();
2194 } /* end SetLocalInt */
2195
2196
2197 // Threads_lock NOT held, java_thread not protected by lock
2198 // java_thread - pre-checked
2199 // java_thread - unchecked
2200 // depth - pre-checked as non-negative
2201 jvmtiError
2202 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2203 // rm object is created to clean up the javaVFrame created in
2204 // doit_prologue(), but after doit() is finished with it.
2205 ResourceMark rm;
2206 jvalue val;
2207 val.j = value;
2208 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2209 VMThread::execute(&op);
2210 return op.result();
2211 } /* end SetLocalLong */
2212
2213
2214 // Threads_lock NOT held, java_thread not protected by lock
2215 // java_thread - pre-checked
2216 // java_thread - unchecked
2217 // depth - pre-checked as non-negative
2218 jvmtiError
2219 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2220 // rm object is created to clean up the javaVFrame created in
2221 // doit_prologue(), but after doit() is finished with it.
2222 ResourceMark rm;
2223 jvalue val;
2224 val.f = value;
2225 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2226 VMThread::execute(&op);
2227 return op.result();
2228 } /* end SetLocalFloat */
2229
2230
2231 // Threads_lock NOT held, java_thread not protected by lock
2232 // java_thread - pre-checked
2233 // java_thread - unchecked
2234 // depth - pre-checked as non-negative
2235 jvmtiError
2236 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2237 // rm object is created to clean up the javaVFrame created in
2238 // doit_prologue(), but after doit() is finished with it.
2239 ResourceMark rm;
2240 jvalue val;
2241 val.d = value;
2242 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2243 VMThread::execute(&op);
2244 return op.result();
2245 } /* end SetLocalDouble */
2246
2247
2248 //
2249 // Breakpoint functions
2250 //
2251
2252 // method - pre-checked for validity, but may be NULL meaning obsolete method
2253 jvmtiError
2254 JvmtiEnv::SetBreakpoint(Method* method, jlocation location) {
2255 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
2256 if (location < 0) { // simple invalid location check first
2257 return JVMTI_ERROR_INVALID_LOCATION;
2258 }
2259 // verify that the breakpoint is not past the end of the method
2260 if (location >= (jlocation) method->code_size()) {
2261 return JVMTI_ERROR_INVALID_LOCATION;
2262 }
2263
2264 ResourceMark rm;
2265 JvmtiBreakpoint bp(method, location);
2266 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2267 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2268 return JVMTI_ERROR_DUPLICATE;
2269
2270 if (TraceJVMTICalls) {
2271 jvmti_breakpoints.print();
2272 }
2273
2274 return JVMTI_ERROR_NONE;
2275 } /* end SetBreakpoint */
2276
2277
2278 // method - pre-checked for validity, but may be NULL meaning obsolete method
2279 jvmtiError
2280 JvmtiEnv::ClearBreakpoint(Method* method, jlocation location) {
2281 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
2282
2283 if (location < 0) { // simple invalid location check first
2284 return JVMTI_ERROR_INVALID_LOCATION;
2285 }
2286
2287 // verify that the breakpoint is not past the end of the method
2288 if (location >= (jlocation) method->code_size()) {
2289 return JVMTI_ERROR_INVALID_LOCATION;
2290 }
2291
2292 JvmtiBreakpoint bp(method, location);
2293
2294 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2295 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2296 return JVMTI_ERROR_NOT_FOUND;
2297
2298 if (TraceJVMTICalls) {
2299 jvmti_breakpoints.print();
2300 }
2301
2302 return JVMTI_ERROR_NONE;
2303 } /* end ClearBreakpoint */
2304
2305
2306 //
2307 // Watched Field functions
2308 //
2309
2310 jvmtiError
2311 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2312 // make sure we haven't set this watch before
2313 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2314 fdesc_ptr->set_is_field_access_watched(true);
2315
2316 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2317
2318 return JVMTI_ERROR_NONE;
2319 } /* end SetFieldAccessWatch */
2320
2321
2322 jvmtiError
2323 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2324 // make sure we have a watch to clear
2325 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2326 fdesc_ptr->set_is_field_access_watched(false);
2327
2328 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2329
2330 return JVMTI_ERROR_NONE;
2331 } /* end ClearFieldAccessWatch */
2332
2333
2334 jvmtiError
2335 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2336 // make sure we haven't set this watch before
2337 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2338 fdesc_ptr->set_is_field_modification_watched(true);
2339
2340 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2341
2342 return JVMTI_ERROR_NONE;
2343 } /* end SetFieldModificationWatch */
2344
2345
2346 jvmtiError
2347 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2348 // make sure we have a watch to clear
2349 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2350 fdesc_ptr->set_is_field_modification_watched(false);
2351
2352 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2353
2354 return JVMTI_ERROR_NONE;
2355 } /* end ClearFieldModificationWatch */
2356
2357 //
2358 // Class functions
2359 //
2360
2361
2362 // k_mirror - may be primitive, this must be checked
2363 // signature_ptr - NULL is a valid value, must be checked
2364 // generic_ptr - NULL is a valid value, must be checked
2365 jvmtiError
2366 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2367 ResourceMark rm;
2368 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2369 Klass* k = NULL;
2370 if (!isPrimitive) {
2371 k = java_lang_Class::as_Klass(k_mirror);
2372 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2373 }
2374 if (signature_ptr != NULL) {
2375 char* result = NULL;
2376 if (isPrimitive) {
2377 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2378 result = (char*) jvmtiMalloc(2);
2379 result[0] = tchar;
2380 result[1] = '\0';
2381 } else {
2382 const char* class_sig = k->signature_name();
2383 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2384 strcpy(result, class_sig);
2385 }
2386 *signature_ptr = result;
2387 }
2388 if (generic_ptr != NULL) {
2389 *generic_ptr = NULL;
2390 if (!isPrimitive && k->is_instance_klass()) {
2391 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2392 if (soo != NULL) {
2393 const char *gen_sig = soo->as_C_string();
2394 if (gen_sig != NULL) {
2395 char* gen_result;
2396 jvmtiError err = allocate(strlen(gen_sig) + 1,
2397 (unsigned char **)&gen_result);
2398 if (err != JVMTI_ERROR_NONE) {
2399 return err;
2400 }
2401 strcpy(gen_result, gen_sig);
2402 *generic_ptr = gen_result;
2403 }
2404 }
2405 }
2406 }
2407 return JVMTI_ERROR_NONE;
2408 } /* end GetClassSignature */
2409
2410
2411 // k_mirror - may be primitive, this must be checked
2412 // status_ptr - pre-checked for NULL
2413 jvmtiError
2414 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2415 jint result = 0;
2416 if (java_lang_Class::is_primitive(k_mirror)) {
2417 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2418 } else {
2419 Klass* k = java_lang_Class::as_Klass(k_mirror);
2420 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2421 result = k->jvmti_class_status();
2422 }
2423 *status_ptr = result;
2424
2425 return JVMTI_ERROR_NONE;
2426 } /* end GetClassStatus */
2427
2428
2429 // k_mirror - may be primitive, this must be checked
2430 // source_name_ptr - pre-checked for NULL
2431 jvmtiError
2432 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2433 if (java_lang_Class::is_primitive(k_mirror)) {
2434 return JVMTI_ERROR_ABSENT_INFORMATION;
2435 }
2436 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2437 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2438
2439 if (!k_klass->is_instance_klass()) {
2440 return JVMTI_ERROR_ABSENT_INFORMATION;
2441 }
2442
2443 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2444 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2445 {
2446 JavaThread* current_thread = JavaThread::current();
2447 ResourceMark rm(current_thread);
2448 const char* sfncp = (const char*) sfnOop->as_C_string();
2449 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2450 strcpy(*source_name_ptr, sfncp);
2451 }
2452
2453 return JVMTI_ERROR_NONE;
2454 } /* end GetSourceFileName */
2455
2456
2457 // k_mirror - may be primitive, this must be checked
2458 // modifiers_ptr - pre-checked for NULL
2459 jvmtiError
2460 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2461 JavaThread* current_thread = JavaThread::current();
2462 jint result = 0;
2463 if (!java_lang_Class::is_primitive(k_mirror)) {
2464 Klass* k = java_lang_Class::as_Klass(k_mirror);
2465 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2466 result = k->compute_modifier_flags(current_thread);
2467 JavaThread* THREAD = current_thread; // pass to macros
2468 if (HAS_PENDING_EXCEPTION) {
2469 CLEAR_PENDING_EXCEPTION;
2470 return JVMTI_ERROR_INTERNAL;
2471 };
2472
2473 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2474 if(k->is_super()) {
2475 result |= JVM_ACC_SUPER;
2476 }
2477 } else {
2478 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2479 }
2480 *modifiers_ptr = result;
2481
2482 return JVMTI_ERROR_NONE;
2483 } /* end GetClassModifiers */
2484
2485
2486 // k_mirror - may be primitive, this must be checked
2487 // method_count_ptr - pre-checked for NULL
2488 // methods_ptr - pre-checked for NULL
2489 jvmtiError
2490 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2491 JavaThread* current_thread = JavaThread::current();
2492 HandleMark hm(current_thread);
2493
2494 if (java_lang_Class::is_primitive(k_mirror)) {
2495 *method_count_ptr = 0;
2496 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2497 return JVMTI_ERROR_NONE;
2498 }
2499 Klass* k = java_lang_Class::as_Klass(k_mirror);
2500 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2501
2502 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2503 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2504 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2505 }
2506
2507 if (!k->is_instance_klass()) {
2508 *method_count_ptr = 0;
2509 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2510 return JVMTI_ERROR_NONE;
2511 }
2512 InstanceKlass* ik = InstanceKlass::cast(k);
2513 // Allocate the result and fill it in
2514 int result_length = ik->methods()->length();
2515 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2516 int index;
2517 bool jmethodids_found = true;
2518 int skipped = 0; // skip overpass methods
2519
2520 for (index = 0; index < result_length; index++) {
2521 Method* m = ik->methods()->at(index);
2522 // Depending on can_maintain_original_method_order capability use the original
2523 // method ordering indices stored in the class, so we can emit jmethodIDs in
2524 // the order they appeared in the class file or just copy in current order.
2525 int result_index = JvmtiExport::can_maintain_original_method_order() ? ik->method_ordering()->at(index) : index;
2526 assert(result_index >= 0 && result_index < result_length, "invalid original method index");
2527 if (m->is_overpass()) {
2528 result_list[result_index] = NULL;
2529 skipped++;
2530 continue;
2531 }
2532 jmethodID id;
2533 if (jmethodids_found) {
2534 id = m->find_jmethod_id_or_null();
2535 if (id == NULL) {
2536 // If we find an uninitialized value, make sure there is
2537 // enough space for all the uninitialized values we might
2538 // find.
2539 ik->ensure_space_for_methodids(index);
2540 jmethodids_found = false;
2541 id = m->jmethod_id();
2542 }
2543 } else {
2544 id = m->jmethod_id();
2545 }
2546 result_list[result_index] = id;
2547 }
2548
2549 // Fill in return value.
2550 if (skipped > 0) {
2551 // copy results skipping NULL methodIDs
2552 *methods_ptr = (jmethodID*)jvmtiMalloc((result_length - skipped) * sizeof(jmethodID));
2553 *method_count_ptr = result_length - skipped;
2554 for (index = 0, skipped = 0; index < result_length; index++) {
2555 if (result_list[index] == NULL) {
2556 skipped++;
2557 } else {
2558 (*methods_ptr)[index - skipped] = result_list[index];
2559 }
2560 }
2561 deallocate((unsigned char *)result_list);
2562 } else {
2563 *method_count_ptr = result_length;
2564 *methods_ptr = result_list;
2565 }
2566
2567 return JVMTI_ERROR_NONE;
2568 } /* end GetClassMethods */
2569
2570
2571 // k_mirror - may be primitive, this must be checked
2572 // field_count_ptr - pre-checked for NULL
2573 // fields_ptr - pre-checked for NULL
2574 jvmtiError
2575 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2576 if (java_lang_Class::is_primitive(k_mirror)) {
2577 *field_count_ptr = 0;
2578 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2579 return JVMTI_ERROR_NONE;
2580 }
2581 JavaThread* current_thread = JavaThread::current();
2582 HandleMark hm(current_thread);
2583 Klass* k = java_lang_Class::as_Klass(k_mirror);
2584 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2585
2586 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2587 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2588 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2589 }
2590
2591 if (!k->is_instance_klass()) {
2592 *field_count_ptr = 0;
2593 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2594 return JVMTI_ERROR_NONE;
2595 }
2596
2597
2598 InstanceKlass* ik = InstanceKlass::cast(k);
2599
2600 int result_count = 0;
2601 // First, count the fields.
2602 FilteredFieldStream flds(ik, true, true);
2603 result_count = flds.field_count();
2604
2605 // Allocate the result and fill it in
2606 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2607 // The JVMTI spec requires fields in the order they occur in the class file,
2608 // this is the reverse order of what FieldStream hands out.
2609 int id_index = (result_count - 1);
2610
2611 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2612 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2613 ik, src_st.offset(),
2614 src_st.access_flags().is_static());
2615 }
2616 assert(id_index == -1, "just checking");
2617 // Fill in the results
2618 *field_count_ptr = result_count;
2619 *fields_ptr = result_list;
2620
2621 return JVMTI_ERROR_NONE;
2622 } /* end GetClassFields */
2623
2624
2625 // k_mirror - may be primitive, this must be checked
2626 // interface_count_ptr - pre-checked for NULL
2627 // interfaces_ptr - pre-checked for NULL
2628 jvmtiError
2629 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2630 {
2631 if (java_lang_Class::is_primitive(k_mirror)) {
2632 *interface_count_ptr = 0;
2633 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2634 return JVMTI_ERROR_NONE;
2635 }
2636 JavaThread* current_thread = JavaThread::current();
2637 HandleMark hm(current_thread);
2638 Klass* k = java_lang_Class::as_Klass(k_mirror);
2639 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2640
2641 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2642 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2643 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2644
2645 if (!k->is_instance_klass()) {
2646 *interface_count_ptr = 0;
2647 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2648 return JVMTI_ERROR_NONE;
2649 }
2650
2651 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2652 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2653 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2654 for (int i_index = 0; i_index < result_length; i_index += 1) {
2655 InstanceKlass* klass_at = interface_list->at(i_index);
2656 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2657 assert(klass_at->is_interface(), "interfaces must be interfaces");
2658 oop mirror_at = klass_at->java_mirror();
2659 Handle handle_at = Handle(current_thread, mirror_at);
2660 result_list[i_index] = (jclass) jni_reference(handle_at);
2661 }
2662 *interface_count_ptr = result_length;
2663 *interfaces_ptr = result_list;
2664 }
2665
2666 return JVMTI_ERROR_NONE;
2667 } /* end GetImplementedInterfaces */
2668
2669
2670 // k_mirror - may be primitive, this must be checked
2671 // minor_version_ptr - pre-checked for NULL
2672 // major_version_ptr - pre-checked for NULL
2673 jvmtiError
2674 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2675 if (java_lang_Class::is_primitive(k_mirror)) {
2676 return JVMTI_ERROR_ABSENT_INFORMATION;
2677 }
2678 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2679
2680 jint status = klass->jvmti_class_status();
2681 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2682 return JVMTI_ERROR_INVALID_CLASS;
2683 }
2684 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2685 return JVMTI_ERROR_ABSENT_INFORMATION;
2686 }
2687
2688 InstanceKlass* ik = InstanceKlass::cast(klass);
2689 *minor_version_ptr = ik->minor_version();
2690 *major_version_ptr = ik->major_version();
2691
2692 return JVMTI_ERROR_NONE;
2693 } /* end GetClassVersionNumbers */
2694
2695
2696 // k_mirror - may be primitive, this must be checked
2697 // constant_pool_count_ptr - pre-checked for NULL
2698 // constant_pool_byte_count_ptr - pre-checked for NULL
2699 // constant_pool_bytes_ptr - pre-checked for NULL
2700 jvmtiError
2701 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2702 if (java_lang_Class::is_primitive(k_mirror)) {
2703 return JVMTI_ERROR_ABSENT_INFORMATION;
2704 }
2705
2706 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2707 Thread *thread = Thread::current();
2708 ResourceMark rm(thread);
2709
2710 jint status = klass->jvmti_class_status();
2711 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2712 return JVMTI_ERROR_INVALID_CLASS;
2713 }
2714 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2715 return JVMTI_ERROR_ABSENT_INFORMATION;
2716 }
2717
2718 InstanceKlass* ik = InstanceKlass::cast(klass);
2719 JvmtiConstantPoolReconstituter reconstituter(ik);
2720 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2721 return reconstituter.get_error();
2722 }
2723
2724 unsigned char *cpool_bytes;
2725 int cpool_size = reconstituter.cpool_size();
2726 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2727 return reconstituter.get_error();
2728 }
2729 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2730 if (res != JVMTI_ERROR_NONE) {
2731 return res;
2732 }
2733 reconstituter.copy_cpool_bytes(cpool_bytes);
2734 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2735 return reconstituter.get_error();
2736 }
2737
2738 constantPoolHandle constants(thread, ik->constants());
2739 *constant_pool_count_ptr = constants->length();
2740 *constant_pool_byte_count_ptr = cpool_size;
2741 *constant_pool_bytes_ptr = cpool_bytes;
2742
2743 return JVMTI_ERROR_NONE;
2744 } /* end GetConstantPool */
2745
2746
2747 // k_mirror - may be primitive, this must be checked
2748 // is_interface_ptr - pre-checked for NULL
2749 jvmtiError
2750 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2751 {
2752 bool result = false;
2753 if (!java_lang_Class::is_primitive(k_mirror)) {
2754 Klass* k = java_lang_Class::as_Klass(k_mirror);
2755 if (k != NULL && k->is_interface()) {
2756 result = true;
2757 }
2758 }
2759 *is_interface_ptr = result;
2760 }
2761
2762 return JVMTI_ERROR_NONE;
2763 } /* end IsInterface */
2764
2765
2766 // k_mirror - may be primitive, this must be checked
2767 // is_array_class_ptr - pre-checked for NULL
2768 jvmtiError
2769 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2770 {
2771 bool result = false;
2772 if (!java_lang_Class::is_primitive(k_mirror)) {
2773 Klass* k = java_lang_Class::as_Klass(k_mirror);
2774 if (k != NULL && k->is_array_klass()) {
2775 result = true;
2776 }
2777 }
2778 *is_array_class_ptr = result;
2779 }
2780
2781 return JVMTI_ERROR_NONE;
2782 } /* end IsArrayClass */
2783
2784
2785 // k_mirror - may be primitive, this must be checked
2786 // classloader_ptr - pre-checked for NULL
2787 jvmtiError
2788 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2789 {
2790 if (java_lang_Class::is_primitive(k_mirror)) {
2791 *classloader_ptr = (jclass) jni_reference(Handle());
2792 return JVMTI_ERROR_NONE;
2793 }
2794 JavaThread* current_thread = JavaThread::current();
2795 HandleMark hm(current_thread);
2796 Klass* k = java_lang_Class::as_Klass(k_mirror);
2797 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2798
2799 oop result_oop = k->class_loader();
2800 if (result_oop == NULL) {
2801 *classloader_ptr = (jclass) jni_reference(Handle());
2802 return JVMTI_ERROR_NONE;
2803 }
2804 Handle result_handle = Handle(current_thread, result_oop);
2805 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2806 *classloader_ptr = result_jnihandle;
2807 }
2808 return JVMTI_ERROR_NONE;
2809 } /* end GetClassLoader */
2810
2811
2812 // k_mirror - may be primitive, this must be checked
2813 // source_debug_extension_ptr - pre-checked for NULL
2814 jvmtiError
2815 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2816 {
2817 if (java_lang_Class::is_primitive(k_mirror)) {
2818 return JVMTI_ERROR_ABSENT_INFORMATION;
2819 }
2820 Klass* k = java_lang_Class::as_Klass(k_mirror);
2821 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2822 if (!k->is_instance_klass()) {
2823 return JVMTI_ERROR_ABSENT_INFORMATION;
2824 }
2825 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2826 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2827
2828 {
2829 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2830 strcpy(*source_debug_extension_ptr, sde);
2831 }
2832 }
2833
2834 return JVMTI_ERROR_NONE;
2835 } /* end GetSourceDebugExtension */
2836
2837 //
2838 // Object functions
2839 //
2840
2841 // hash_code_ptr - pre-checked for NULL
2842 jvmtiError
2843 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2844 oop mirror = JNIHandles::resolve_external_guard(object);
2845 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2846 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2847
2848 {
2849 jint result = (jint) mirror->identity_hash();
2850 *hash_code_ptr = result;
2851 }
2852 return JVMTI_ERROR_NONE;
2853 } /* end GetObjectHashCode */
2854
2855
2856 // info_ptr - pre-checked for NULL
2857 jvmtiError
2858 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2859 // This needs to be performed at a safepoint to gather stable data
2860 // because monitor owner / waiters might not be suspended.
2861 VM_GetObjectMonitorUsage op(this, JavaThread::current(), object, info_ptr);
2862 VMThread::execute(&op);
2863 return op.result();
2864 } /* end GetObjectMonitorUsage */
2865
2866
2867 //
2868 // Field functions
2869 //
2870
2871 // name_ptr - NULL is a valid value, must be checked
2872 // signature_ptr - NULL is a valid value, must be checked
2873 // generic_ptr - NULL is a valid value, must be checked
2874 jvmtiError
2875 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2876 JavaThread* current_thread = JavaThread::current();
2877 ResourceMark rm(current_thread);
2878 if (name_ptr == NULL) {
2879 // just don't return the name
2880 } else {
2881 const char* fieldName = fdesc_ptr->name()->as_C_string();
2882 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2883 if (*name_ptr == NULL)
2884 return JVMTI_ERROR_OUT_OF_MEMORY;
2885 strcpy(*name_ptr, fieldName);
2886 }
2887 if (signature_ptr== NULL) {
2888 // just don't return the signature
2889 } else {
2890 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2891 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2892 if (*signature_ptr == NULL)
2893 return JVMTI_ERROR_OUT_OF_MEMORY;
2894 strcpy(*signature_ptr, fieldSignature);
2895 }
2896 if (generic_ptr != NULL) {
2897 *generic_ptr = NULL;
2898 Symbol* soop = fdesc_ptr->generic_signature();
2899 if (soop != NULL) {
2900 const char* gen_sig = soop->as_C_string();
2901 if (gen_sig != NULL) {
2902 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2903 if (err != JVMTI_ERROR_NONE) {
2904 return err;
2905 }
2906 strcpy(*generic_ptr, gen_sig);
2907 }
2908 }
2909 }
2910 return JVMTI_ERROR_NONE;
2911 } /* end GetFieldName */
2912
2913
2914 // declaring_class_ptr - pre-checked for NULL
2915 jvmtiError
2916 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2917
2918 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2919 return JVMTI_ERROR_NONE;
2920 } /* end GetFieldDeclaringClass */
2921
2922
2923 // modifiers_ptr - pre-checked for NULL
2924 jvmtiError
2925 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2926
2927 AccessFlags resultFlags = fdesc_ptr->access_flags();
2928 jint result = resultFlags.as_int();
2929 *modifiers_ptr = result;
2930
2931 return JVMTI_ERROR_NONE;
2932 } /* end GetFieldModifiers */
2933
2934
2935 // is_synthetic_ptr - pre-checked for NULL
2936 jvmtiError
2937 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2938 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2939 return JVMTI_ERROR_NONE;
2940 } /* end IsFieldSynthetic */
2941
2942
2943 //
2944 // Method functions
2945 //
2946
2947 // method - pre-checked for validity, but may be NULL meaning obsolete method
2948 // name_ptr - NULL is a valid value, must be checked
2949 // signature_ptr - NULL is a valid value, must be checked
2950 // generic_ptr - NULL is a valid value, must be checked
2951 jvmtiError
2952 JvmtiEnv::GetMethodName(Method* method, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2953 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
2954 JavaThread* current_thread = JavaThread::current();
2955
2956 ResourceMark rm(current_thread); // get the utf8 name and signature
2957 if (name_ptr == NULL) {
2958 // just don't return the name
2959 } else {
2960 const char* utf8_name = (const char *) method->name()->as_utf8();
2961 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2962 strcpy(*name_ptr, utf8_name);
2963 }
2964 if (signature_ptr == NULL) {
2965 // just don't return the signature
2966 } else {
2967 const char* utf8_signature = (const char *) method->signature()->as_utf8();
2968 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2969 strcpy(*signature_ptr, utf8_signature);
2970 }
2971
2972 if (generic_ptr != NULL) {
2973 *generic_ptr = NULL;
2974 Symbol* soop = method->generic_signature();
2975 if (soop != NULL) {
2976 const char* gen_sig = soop->as_C_string();
2977 if (gen_sig != NULL) {
2978 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2979 if (err != JVMTI_ERROR_NONE) {
2980 return err;
2981 }
2982 strcpy(*generic_ptr, gen_sig);
2983 }
2984 }
2985 }
2986 return JVMTI_ERROR_NONE;
2987 } /* end GetMethodName */
2988
2989
2990 // method - pre-checked for validity, but may be NULL meaning obsolete method
2991 // declaring_class_ptr - pre-checked for NULL
2992 jvmtiError
2993 JvmtiEnv::GetMethodDeclaringClass(Method* method, jclass* declaring_class_ptr) {
2994 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
2995 (*declaring_class_ptr) = get_jni_class_non_null(method->method_holder());
2996 return JVMTI_ERROR_NONE;
2997 } /* end GetMethodDeclaringClass */
2998
2999
3000 // method - pre-checked for validity, but may be NULL meaning obsolete method
3001 // modifiers_ptr - pre-checked for NULL
3002 jvmtiError
3003 JvmtiEnv::GetMethodModifiers(Method* method, jint* modifiers_ptr) {
3004 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3005 (*modifiers_ptr) = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
3006 return JVMTI_ERROR_NONE;
3007 } /* end GetMethodModifiers */
3008
3009
3010 // method - pre-checked for validity, but may be NULL meaning obsolete method
3011 // max_ptr - pre-checked for NULL
3012 jvmtiError
3013 JvmtiEnv::GetMaxLocals(Method* method, jint* max_ptr) {
3014 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3015 // get max stack
3016 (*max_ptr) = method->max_locals();
3017 return JVMTI_ERROR_NONE;
3018 } /* end GetMaxLocals */
3019
3020
3021 // method - pre-checked for validity, but may be NULL meaning obsolete method
3022 // size_ptr - pre-checked for NULL
3023 jvmtiError
3024 JvmtiEnv::GetArgumentsSize(Method* method, jint* size_ptr) {
3025 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3026 // get size of arguments
3027
3028 (*size_ptr) = method->size_of_parameters();
3029 return JVMTI_ERROR_NONE;
3030 } /* end GetArgumentsSize */
3031
3032
3033 // method - pre-checked for validity, but may be NULL meaning obsolete method
3034 // entry_count_ptr - pre-checked for NULL
3035 // table_ptr - pre-checked for NULL
3036 jvmtiError
3037 JvmtiEnv::GetLineNumberTable(Method* method, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3038 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3039 if (!method->has_linenumber_table()) {
3040 return (JVMTI_ERROR_ABSENT_INFORMATION);
3041 }
3042
3043 // The line number table is compressed so we don't know how big it is until decompressed.
3044 // Decompression is really fast so we just do it twice.
3045
3046 // Compute size of table
3047 jint num_entries = 0;
3048 CompressedLineNumberReadStream stream(method->compressed_linenumber_table());
3049 while (stream.read_pair()) {
3050 num_entries++;
3051 }
3052 jvmtiLineNumberEntry *jvmti_table =
3053 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3054
3055 // Fill jvmti table
3056 if (num_entries > 0) {
3057 int index = 0;
3058 CompressedLineNumberReadStream stream(method->compressed_linenumber_table());
3059 while (stream.read_pair()) {
3060 jvmti_table[index].start_location = (jlocation) stream.bci();
3061 jvmti_table[index].line_number = (jint) stream.line();
3062 index++;
3063 }
3064 assert(index == num_entries, "sanity check");
3065 }
3066
3067 // Set up results
3068 (*entry_count_ptr) = num_entries;
3069 (*table_ptr) = jvmti_table;
3070
3071 return JVMTI_ERROR_NONE;
3072 } /* end GetLineNumberTable */
3073
3074
3075 // method - pre-checked for validity, but may be NULL meaning obsolete method
3076 // start_location_ptr - pre-checked for NULL
3077 // end_location_ptr - pre-checked for NULL
3078 jvmtiError
3079 JvmtiEnv::GetMethodLocation(Method* method, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3080
3081 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3082 // get start and end location
3083 (*end_location_ptr) = (jlocation) (method->code_size() - 1);
3084 if (method->code_size() == 0) {
3085 // there is no code so there is no start location
3086 (*start_location_ptr) = (jlocation)(-1);
3087 } else {
3088 (*start_location_ptr) = (jlocation)(0);
3089 }
3090
3091 return JVMTI_ERROR_NONE;
3092 } /* end GetMethodLocation */
3093
3094
3095 // method - pre-checked for validity, but may be NULL meaning obsolete method
3096 // entry_count_ptr - pre-checked for NULL
3097 // table_ptr - pre-checked for NULL
3098 jvmtiError
3099 JvmtiEnv::GetLocalVariableTable(Method* method, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3100
3101 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3102 JavaThread* current_thread = JavaThread::current();
3103
3104 // does the klass have any local variable information?
3105 InstanceKlass* ik = method->method_holder();
3106 if (!ik->access_flags().has_localvariable_table()) {
3107 return (JVMTI_ERROR_ABSENT_INFORMATION);
3108 }
3109
3110 ConstantPool* constants = method->constants();
3111 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3112
3113 // in the vm localvariable table representation, 6 consecutive elements in the table
3114 // represent a 6-tuple of shorts
3115 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3116 jint num_entries = method->localvariable_table_length();
3117 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3118 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3119
3120 if (num_entries > 0) {
3121 LocalVariableTableElement* table = method->localvariable_table_start();
3122 for (int i = 0; i < num_entries; i++) {
3123 // get the 5 tuple information from the vm table
3124 jlocation start_location = (jlocation) table[i].start_bci;
3125 jint length = (jint) table[i].length;
3126 int name_index = (int) table[i].name_cp_index;
3127 int signature_index = (int) table[i].descriptor_cp_index;
3128 int generic_signature_index = (int) table[i].signature_cp_index;
3129 jint slot = (jint) table[i].slot;
3130
3131 // get utf8 name and signature
3132 char *name_buf = NULL;
3133 char *sig_buf = NULL;
3134 char *gen_sig_buf = NULL;
3135 {
3136 ResourceMark rm(current_thread);
3137
3138 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3139 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3140 strcpy(name_buf, utf8_name);
3141
3142 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3143 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3144 strcpy(sig_buf, utf8_signature);
3145
3146 if (generic_signature_index > 0) {
3147 const char *utf8_gen_sign = (const char *)
3148 constants->symbol_at(generic_signature_index)->as_utf8();
3149 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3150 strcpy(gen_sig_buf, utf8_gen_sign);
3151 }
3152 }
3153
3154 // fill in the jvmti local variable table
3155 jvmti_table[i].start_location = start_location;
3156 jvmti_table[i].length = length;
3157 jvmti_table[i].name = name_buf;
3158 jvmti_table[i].signature = sig_buf;
3159 jvmti_table[i].generic_signature = gen_sig_buf;
3160 jvmti_table[i].slot = slot;
3161 }
3162 }
3163
3164 // set results
3165 (*entry_count_ptr) = num_entries;
3166 (*table_ptr) = jvmti_table;
3167
3168 return JVMTI_ERROR_NONE;
3169 } /* end GetLocalVariableTable */
3170
3171
3172 // method - pre-checked for validity, but may be NULL meaning obsolete method
3173 // bytecode_count_ptr - pre-checked for NULL
3174 // bytecodes_ptr - pre-checked for NULL
3175 jvmtiError
3176 JvmtiEnv::GetBytecodes(Method* method, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3177 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3178
3179 methodHandle mh(Thread::current(), method);
3180 jint size = (jint)mh->code_size();
3181 jvmtiError err = allocate(size, bytecodes_ptr);
3182 if (err != JVMTI_ERROR_NONE) {
3183 return err;
3184 }
3185
3186 (*bytecode_count_ptr) = size;
3187 // get byte codes
3188 JvmtiClassFileReconstituter::copy_bytecodes(mh, *bytecodes_ptr);
3189
3190 return JVMTI_ERROR_NONE;
3191 } /* end GetBytecodes */
3192
3193
3194 // method - pre-checked for validity, but may be NULL meaning obsolete method
3195 // is_native_ptr - pre-checked for NULL
3196 jvmtiError
3197 JvmtiEnv::IsMethodNative(Method* method, jboolean* is_native_ptr) {
3198 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3199 (*is_native_ptr) = method->is_native();
3200 return JVMTI_ERROR_NONE;
3201 } /* end IsMethodNative */
3202
3203
3204 // method - pre-checked for validity, but may be NULL meaning obsolete method
3205 // is_synthetic_ptr - pre-checked for NULL
3206 jvmtiError
3207 JvmtiEnv::IsMethodSynthetic(Method* method, jboolean* is_synthetic_ptr) {
3208 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID);
3209 (*is_synthetic_ptr) = method->is_synthetic();
3210 return JVMTI_ERROR_NONE;
3211 } /* end IsMethodSynthetic */
3212
3213
3214 // method - pre-checked for validity, but may be NULL meaning obsolete method
3215 // is_obsolete_ptr - pre-checked for NULL
3216 jvmtiError
3217 JvmtiEnv::IsMethodObsolete(Method* method, jboolean* is_obsolete_ptr) {
3218 if (use_version_1_0_semantics() &&
3219 get_capabilities()->can_redefine_classes == 0) {
3220 // This JvmtiEnv requested version 1.0 semantics and this function
3221 // requires the can_redefine_classes capability in version 1.0 so
3222 // we need to return an error here.
3223 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3224 }
3225
3226 if (method == NULL || method->is_obsolete()) {
3227 *is_obsolete_ptr = true;
3228 } else {
3229 *is_obsolete_ptr = false;
3230 }
3231 return JVMTI_ERROR_NONE;
3232 } /* end IsMethodObsolete */
3233
3234 //
3235 // Raw Monitor functions
3236 //
3237
3238 // name - pre-checked for NULL
3239 // monitor_ptr - pre-checked for NULL
3240 jvmtiError
3241 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3242 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3243 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3244
3245 *monitor_ptr = (jrawMonitorID)rmonitor;
3246
3247 return JVMTI_ERROR_NONE;
3248 } /* end CreateRawMonitor */
3249
3250
3251 // rmonitor - pre-checked for validity
3252 jvmtiError
3253 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3254 if (Threads::number_of_threads() == 0) {
3255 // Remove this monitor from pending raw monitors list
3256 // if it has entered in onload or start phase.
3257 JvmtiPendingMonitors::destroy(rmonitor);
3258 } else {
3259 Thread* thread = Thread::current();
3260 if (rmonitor->owner() == thread) {
3261 // The caller owns this monitor which we are about to destroy.
3262 // We exit the underlying synchronization object so that the
3263 // "delete monitor" call below can work without an assertion
3264 // failure on systems that don't like destroying synchronization
3265 // objects that are locked.
3266 int r;
3267 int recursion = rmonitor->recursions();
3268 for (int i = 0; i <= recursion; i++) {
3269 r = rmonitor->raw_exit(thread);
3270 assert(r == JvmtiRawMonitor::M_OK, "raw_exit should have worked");
3271 if (r != JvmtiRawMonitor::M_OK) { // robustness
3272 return JVMTI_ERROR_INTERNAL;
3273 }
3274 }
3275 }
3276 if (rmonitor->owner() != NULL) {
3277 // The caller is trying to destroy a monitor that is locked by
3278 // someone else. While this is not forbidden by the JVMTI
3279 // spec, it will cause an assertion failure on systems that don't
3280 // like destroying synchronization objects that are locked.
3281 // We indicate a problem with the error return (and leak the
3282 // monitor's memory).
3283 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3284 }
3285 }
3286
3287 delete rmonitor;
3288
3289 return JVMTI_ERROR_NONE;
3290 } /* end DestroyRawMonitor */
3291
3292
3293 // rmonitor - pre-checked for validity
3294 jvmtiError
3295 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3296 if (Threads::number_of_threads() == 0) {
3297 // No JavaThreads exist so JvmtiRawMonitor enter cannot be
3298 // used, add this raw monitor to the pending list.
3299 // The pending monitors will be actually entered when
3300 // the VM is setup.
3301 // See transition_pending_raw_monitors in create_vm()
3302 // in thread.cpp.
3303 JvmtiPendingMonitors::enter(rmonitor);
3304 } else {
3305 Thread* thread = Thread::current();
3306 if (thread->is_Java_thread()) {
3307 JavaThread* current_thread = (JavaThread*)thread;
3308
3309 /* Transition to thread_blocked without entering vm state */
3310 /* This is really evil. Normally you can't undo _thread_blocked */
3311 /* transitions like this because it would cause us to miss a */
3312 /* safepoint but since the thread was already in _thread_in_native */
3313 /* the thread is not leaving a safepoint safe state and it will */
3314 /* block when it tries to return from native. We can't safepoint */
3315 /* block in here because we could deadlock the vmthread. Blech. */
3316
3317 JavaThreadState state = current_thread->thread_state();
3318 assert(state == _thread_in_native, "Must be _thread_in_native");
3319 // frame should already be walkable since we are in native
3320 assert(!current_thread->has_last_Java_frame() ||
3321 current_thread->frame_anchor()->walkable(), "Must be walkable");
3322 current_thread->set_thread_state(_thread_blocked);
3323
3324 rmonitor->raw_enter(current_thread);
3325 // restore state, still at a safepoint safe state
3326 current_thread->set_thread_state(state);
3327 } else {
3328 rmonitor->raw_enter(thread);
3329 }
3330 }
3331 return JVMTI_ERROR_NONE;
3332 } /* end RawMonitorEnter */
3333
3334
3335 // rmonitor - pre-checked for validity
3336 jvmtiError
3337 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3338 jvmtiError err = JVMTI_ERROR_NONE;
3339
3340 if (Threads::number_of_threads() == 0) {
3341 // No JavaThreads exist so just remove this monitor from the pending list.
3342 // Bool value from exit is false if rmonitor is not in the list.
3343 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3344 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3345 }
3346 } else {
3347 Thread* thread = Thread::current();
3348 int r = rmonitor->raw_exit(thread);
3349 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3350 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3351 }
3352 }
3353 return err;
3354 } /* end RawMonitorExit */
3355
3356
3357 // rmonitor - pre-checked for validity
3358 jvmtiError
3359 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3360 Thread* thread = Thread::current();
3361 int r = rmonitor->raw_wait(millis, thread);
3362
3363 switch (r) {
3364 case JvmtiRawMonitor::M_INTERRUPTED:
3365 return JVMTI_ERROR_INTERRUPT;
3366 case JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE:
3367 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3368 default:
3369 return JVMTI_ERROR_NONE;
3370 }
3371 } /* end RawMonitorWait */
3372
3373
3374 // rmonitor - pre-checked for validity
3375 jvmtiError
3376 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3377 Thread* thread = Thread::current();
3378 int r = rmonitor->raw_notify(thread);
3379
3380 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3381 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3382 }
3383 return JVMTI_ERROR_NONE;
3384 } /* end RawMonitorNotify */
3385
3386
3387 // rmonitor - pre-checked for validity
3388 jvmtiError
3389 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3390 Thread* thread = Thread::current();
3391 int r = rmonitor->raw_notifyAll(thread);
3392
3393 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3394 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3395 }
3396 return JVMTI_ERROR_NONE;
3397 } /* end RawMonitorNotifyAll */
3398
3399
3400 //
3401 // JNI Function Interception functions
3402 //
3403
3404
3405 // function_table - pre-checked for NULL
3406 jvmtiError
3407 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3408 // Copy jni function table at safepoint.
3409 VM_JNIFunctionTableCopier copier(function_table);
3410 VMThread::execute(&copier);
3411
3412 return JVMTI_ERROR_NONE;
3413 } /* end SetJNIFunctionTable */
3414
3415
3416 // function_table - pre-checked for NULL
3417 jvmtiError
3418 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3419 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3420 if (*function_table == NULL)
3421 return JVMTI_ERROR_OUT_OF_MEMORY;
3422 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3423 return JVMTI_ERROR_NONE;
3424 } /* end GetJNIFunctionTable */
3425
3426
3427 //
3428 // Event Management functions
3429 //
3430
3431 jvmtiError
3432 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3433 // can only generate two event types
3434 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3435 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3436 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3437 }
3438
3439 // for compiled_method_load events we must check that the environment
3440 // has the can_generate_compiled_method_load_events capability.
3441 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3442 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3443 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3444 }
3445 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3446 } else {
3447 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3448 }
3449
3450 } /* end GenerateEvents */
3451
3452
3453 //
3454 // Extension Mechanism functions
3455 //
3456
3457 // extension_count_ptr - pre-checked for NULL
3458 // extensions - pre-checked for NULL
3459 jvmtiError
3460 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3461 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3462 } /* end GetExtensionFunctions */
3463
3464
3465 // extension_count_ptr - pre-checked for NULL
3466 // extensions - pre-checked for NULL
3467 jvmtiError
3468 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3469 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3470 } /* end GetExtensionEvents */
3471
3472
3473 // callback - NULL is a valid value, must be checked
3474 jvmtiError
3475 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3476 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3477 } /* end SetExtensionEventCallback */
3478
3479 //
3480 // Timers functions
3481 //
3482
3483 // info_ptr - pre-checked for NULL
3484 jvmtiError
3485 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3486 os::current_thread_cpu_time_info(info_ptr);
3487 return JVMTI_ERROR_NONE;
3488 } /* end GetCurrentThreadCpuTimerInfo */
3489
3490
3491 // nanos_ptr - pre-checked for NULL
3492 jvmtiError
3493 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3494 *nanos_ptr = os::current_thread_cpu_time();
3495 return JVMTI_ERROR_NONE;
3496 } /* end GetCurrentThreadCpuTime */
3497
3498
3499 // info_ptr - pre-checked for NULL
3500 jvmtiError
3501 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3502 os::thread_cpu_time_info(info_ptr);
3503 return JVMTI_ERROR_NONE;
3504 } /* end GetThreadCpuTimerInfo */
3505
3506
3507 // Threads_lock NOT held, java_thread not protected by lock
3508 // java_thread - pre-checked
3509 // nanos_ptr - pre-checked for NULL
3510 jvmtiError
3511 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3512 *nanos_ptr = os::thread_cpu_time(java_thread);
3513 return JVMTI_ERROR_NONE;
3514 } /* end GetThreadCpuTime */
3515
3516
3517 // info_ptr - pre-checked for NULL
3518 jvmtiError
3519 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3520 os::javaTimeNanos_info(info_ptr);
3521 return JVMTI_ERROR_NONE;
3522 } /* end GetTimerInfo */
3523
3524
3525 // nanos_ptr - pre-checked for NULL
3526 jvmtiError
3527 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3528 *nanos_ptr = os::javaTimeNanos();
3529 return JVMTI_ERROR_NONE;
3530 } /* end GetTime */
3531
3532
3533 // processor_count_ptr - pre-checked for NULL
3534 jvmtiError
3535 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3536 *processor_count_ptr = os::active_processor_count();
3537 return JVMTI_ERROR_NONE;
3538 } /* end GetAvailableProcessors */
3539
3540 jvmtiError
3541 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3542 if (sampling_interval < 0) {
3543 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3544 }
3545 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3546 return JVMTI_ERROR_NONE;
3547 } /* end SetHeapSamplingInterval */
3548
3549 //
3550 // System Properties functions
3551 //
3552
3553 // count_ptr - pre-checked for NULL
3554 // property_ptr - pre-checked for NULL
3555 jvmtiError
3556 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3557 jvmtiError err = JVMTI_ERROR_NONE;
3558
3559 // Get the number of readable properties.
3560 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3561
3562 // Allocate memory to hold the exact number of readable properties.
3563 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3564 if (err != JVMTI_ERROR_NONE) {
3565 return err;
3566 }
3567 int readable_count = 0;
3568 // Loop through the system properties until all the readable properties are found.
3569 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3570 if (p->is_readable()) {
3571 const char *key = p->key();
3572 char **tmp_value = *property_ptr+readable_count;
3573 readable_count++;
3574 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3575 if (err == JVMTI_ERROR_NONE) {
3576 strcpy(*tmp_value, key);
3577 } else {
3578 // clean up previously allocated memory.
3579 for (int j = 0; j < readable_count; j++) {
3580 Deallocate((unsigned char*)*property_ptr+j);
3581 }
3582 Deallocate((unsigned char*)property_ptr);
3583 break;
3584 }
3585 }
3586 }
3587 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3588 return err;
3589 } /* end GetSystemProperties */
3590
3591
3592 // property - pre-checked for NULL
3593 // value_ptr - pre-checked for NULL
3594 jvmtiError
3595 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3596 jvmtiError err = JVMTI_ERROR_NONE;
3597 const char *value;
3598
3599 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3600 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3601 if (value == NULL) {
3602 err = JVMTI_ERROR_NOT_AVAILABLE;
3603 } else {
3604 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3605 if (err == JVMTI_ERROR_NONE) {
3606 strcpy(*value_ptr, value);
3607 }
3608 }
3609 return err;
3610 } /* end GetSystemProperty */
3611
3612
3613 // property - pre-checked for NULL
3614 // value - NULL is a valid value, must be checked
3615 jvmtiError
3616 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3617 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3618
3619 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3620 if (strcmp(property, p->key()) == 0) {
3621 if (p->set_writeable_value(value_ptr)) {
3622 err = JVMTI_ERROR_NONE;
3623 }
3624 }
3625 }
3626 return err;
3627 } /* end SetSystemProperty */