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)Universe::heap()->obj_size(mirror) * 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;
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 HandleMark hm;
701
702 // create the zip entry (which will open the zip file and hence
703 // check that the segment is indeed a zip file).
704 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
705 if (zip_entry == NULL) {
706 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
707 }
708 delete zip_entry; // no longer needed
709
710 // lock the loader
711 Thread* THREAD = Thread::current();
712 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
713
714 ObjectLocker ol(loader, THREAD);
715
716 // need the path as java.lang.String
717 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
718 if (HAS_PENDING_EXCEPTION) {
719 CLEAR_PENDING_EXCEPTION;
720 return JVMTI_ERROR_INTERNAL;
721 }
722
723 // Invoke the appendToClassPathForInstrumentation method - if the method
724 // is not found it means the loader doesn't support adding to the class path
725 // in the live phase.
726 {
727 JavaValue res(T_VOID);
728 JavaCalls::call_special(&res,
729 loader,
730 loader->klass(),
731 vmSymbols::appendToClassPathForInstrumentation_name(),
732 vmSymbols::appendToClassPathForInstrumentation_signature(),
733 path,
734 THREAD);
735 if (HAS_PENDING_EXCEPTION) {
736 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
737 CLEAR_PENDING_EXCEPTION;
738
739 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
740 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
741 } else {
742 return JVMTI_ERROR_INTERNAL;
743 }
744 }
745 }
746
747 return JVMTI_ERROR_NONE;
748 } else {
749 return JVMTI_ERROR_WRONG_PHASE;
750 }
751 } /* end AddToSystemClassLoaderSearch */
752
753 //
754 // General functions
755 //
756
757 // phase_ptr - pre-checked for NULL
758 jvmtiError
759 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
760 *phase_ptr = phase();
761 return JVMTI_ERROR_NONE;
762 } /* end GetPhase */
763
764
765 jvmtiError
766 JvmtiEnv::DisposeEnvironment() {
767 dispose();
768 return JVMTI_ERROR_NONE;
769 } /* end DisposeEnvironment */
770
771
772 // data - NULL is a valid value, must be checked
773 jvmtiError
774 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
775 set_env_local_storage(data);
776 return JVMTI_ERROR_NONE;
777 } /* end SetEnvironmentLocalStorage */
778
779
780 // data_ptr - pre-checked for NULL
781 jvmtiError
782 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
783 *data_ptr = (void*)get_env_local_storage();
784 return JVMTI_ERROR_NONE;
785 } /* end GetEnvironmentLocalStorage */
786
787 // version_ptr - pre-checked for NULL
788 jvmtiError
789 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
790 *version_ptr = JVMTI_VERSION;
791 return JVMTI_ERROR_NONE;
792 } /* end GetVersionNumber */
793
794
795 // name_ptr - pre-checked for NULL
796 jvmtiError
797 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
798 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
799 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
800 }
801 const char *name = JvmtiUtil::error_name(error);
802 if (name == NULL) {
803 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
804 }
805 size_t len = strlen(name) + 1;
806 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
807 if (err == JVMTI_ERROR_NONE) {
808 memcpy(*name_ptr, name, len);
809 }
810 return err;
811 } /* end GetErrorName */
812
813
814 jvmtiError
815 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
816 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
817 switch (flag) {
818 case JVMTI_VERBOSE_OTHER:
819 // ignore
820 break;
821 case JVMTI_VERBOSE_CLASS:
822 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
823 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
824 break;
825 case JVMTI_VERBOSE_GC:
826 LogConfiguration::configure_stdout(level, true, LOG_TAGS(gc));
827 break;
828 case JVMTI_VERBOSE_JNI:
829 level = value == 0 ? LogLevel::Off : LogLevel::Debug;
830 LogConfiguration::configure_stdout(level, true, LOG_TAGS(jni, resolve));
831 break;
832 default:
833 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
834 };
835 return JVMTI_ERROR_NONE;
836 } /* end SetVerboseFlag */
837
838
839 // format_ptr - pre-checked for NULL
840 jvmtiError
841 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
842 *format_ptr = JVMTI_JLOCATION_JVMBCI;
843 return JVMTI_ERROR_NONE;
844 } /* end GetJLocationFormat */
845
846 //
847 // Thread functions
848 //
849
850 // Threads_lock NOT held
851 // thread - NOT pre-checked
852 // thread_state_ptr - pre-checked for NULL
853 jvmtiError
854 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
855 JavaThread* current_thread = JavaThread::current();
856 JavaThread* java_thread = NULL;
857 oop thread_oop = NULL;
858 ThreadsListHandle tlh(current_thread);
859
860 if (thread == NULL) {
861 java_thread = current_thread;
862 thread_oop = java_thread->threadObj();
863
864 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
865 return JVMTI_ERROR_INVALID_THREAD;
866 }
867 } else {
868 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
869 if (err != JVMTI_ERROR_NONE) {
870 // We got an error code so we don't have a JavaThread *, but
871 // only return an error from here if we didn't get a valid
872 // thread_oop.
873 if (thread_oop == NULL) {
874 return err;
875 }
876 // We have a valid thread_oop so we can return some thread state.
877 }
878 }
879
880 // get most state bits
881 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
882
883 if (java_thread != NULL) {
884 // We have a JavaThread* so add more state bits.
885 JavaThreadState jts = java_thread->thread_state();
886
887 if (java_thread->is_being_ext_suspended()) {
888 state |= JVMTI_THREAD_STATE_SUSPENDED;
889 }
890 if (jts == _thread_in_native) {
891 state |= JVMTI_THREAD_STATE_IN_NATIVE;
892 }
893 if (java_thread->is_interrupted(false)) {
894 state |= JVMTI_THREAD_STATE_INTERRUPTED;
895 }
896 }
897
898 *thread_state_ptr = state;
899 return JVMTI_ERROR_NONE;
900 } /* end GetThreadState */
901
902
903 // thread_ptr - pre-checked for NULL
904 jvmtiError
905 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
906 JavaThread* current_thread = JavaThread::current();
907 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
908 return JVMTI_ERROR_NONE;
909 } /* end GetCurrentThread */
910
911
912 // threads_count_ptr - pre-checked for NULL
913 // threads_ptr - pre-checked for NULL
914 jvmtiError
915 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
916 int nthreads = 0;
917 Handle *thread_objs = NULL;
918 ResourceMark rm;
919 HandleMark hm;
920
921 // enumerate threads (including agent threads)
922 ThreadsListEnumerator tle(Thread::current(), 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 ResourceMark rm;
1129 HandleMark hm;
1130
1131 JavaThread* current_thread = JavaThread::current();
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 ResourceMark rm;
1404 HandleMark hm;
1405
1406 JavaThread* current_thread = JavaThread::current();
1407
1408 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1409 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1410
1411 const char* name;
1412 Handle parent_group;
1413 bool is_daemon;
1414 ThreadPriority max_priority;
1415
1416 name = java_lang_ThreadGroup::name(group_obj());
1417 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1418 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1419 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1420
1421 info_ptr->is_daemon = is_daemon;
1422 info_ptr->max_priority = max_priority;
1423 info_ptr->parent = jni_reference(parent_group);
1424
1425 if (name != NULL) {
1426 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1427 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1428 strcpy(info_ptr->name, name);
1429 } else {
1430 info_ptr->name = NULL;
1431 }
1432
1433 return JVMTI_ERROR_NONE;
1434 } /* end GetThreadGroupInfo */
1435
1436
1437 // thread_count_ptr - pre-checked for NULL
1438 // threads_ptr - pre-checked for NULL
1439 // group_count_ptr - pre-checked for NULL
1440 // groups_ptr - pre-checked for NULL
1441 jvmtiError
1442 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1443 JavaThread* current_thread = JavaThread::current();
1444 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1445 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1446
1447 Handle *thread_objs = NULL;
1448 Handle *group_objs = NULL;
1449 int nthreads = 0;
1450 int ngroups = 0;
1451 int hidden_threads = 0;
1452
1453 ResourceMark rm(current_thread);
1454 HandleMark hm(current_thread);
1455
1456 Handle group_hdl(current_thread, group_obj);
1457
1458 { // Cannot allow thread or group counts to change.
1459 ObjectLocker ol(group_hdl, current_thread);
1460
1461 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1462 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1463
1464 if (nthreads > 0) {
1465 ThreadsListHandle tlh(current_thread);
1466 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1467 assert(nthreads <= threads->length(), "too many threads");
1468 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1469 for (int i = 0, j = 0; i < nthreads; i++) {
1470 oop thread_obj = threads->obj_at(i);
1471 assert(thread_obj != NULL, "thread_obj is NULL");
1472 JavaThread *java_thread = NULL;
1473 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1474 if (err == JVMTI_ERROR_NONE) {
1475 // Have a valid JavaThread*.
1476 if (java_thread->is_hidden_from_external_view()) {
1477 // Filter out hidden java threads.
1478 hidden_threads++;
1479 continue;
1480 }
1481 } else {
1482 // We couldn't convert thread_obj into a JavaThread*.
1483 if (err == JVMTI_ERROR_INVALID_THREAD) {
1484 // The thread_obj does not refer to a java.lang.Thread object
1485 // so skip it.
1486 hidden_threads++;
1487 continue;
1488 }
1489 // We have a valid thread_obj, but no JavaThread*; the caller
1490 // can still have limited use for the thread_obj.
1491 }
1492 thread_objs[j++] = Handle(current_thread, thread_obj);
1493 }
1494 nthreads -= hidden_threads;
1495 } // ThreadsListHandle is destroyed here.
1496
1497 if (ngroups > 0) {
1498 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1499 assert(ngroups <= groups->length(), "too many groups");
1500 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1501 for (int i = 0; i < ngroups; i++) {
1502 oop group_obj = groups->obj_at(i);
1503 assert(group_obj != NULL, "group_obj != NULL");
1504 group_objs[i] = Handle(current_thread, group_obj);
1505 }
1506 }
1507 } // ThreadGroup unlocked here
1508
1509 *group_count_ptr = ngroups;
1510 *thread_count_ptr = nthreads;
1511 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1512 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1513 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1514 return JVMTI_ERROR_OUT_OF_MEMORY;
1515 }
1516 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1517 return JVMTI_ERROR_OUT_OF_MEMORY;
1518 }
1519
1520 return JVMTI_ERROR_NONE;
1521 } /* end GetThreadGroupChildren */
1522
1523
1524 //
1525 // Stack Frame functions
1526 //
1527
1528 // Threads_lock NOT held, java_thread not protected by lock
1529 // java_thread - pre-checked
1530 // max_frame_count - pre-checked to be greater than or equal to 0
1531 // frame_buffer - pre-checked for NULL
1532 // count_ptr - pre-checked for NULL
1533 jvmtiError
1534 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1535 jvmtiError err = JVMTI_ERROR_NONE;
1536
1537 // It is only safe to perform the direct operation on the current
1538 // thread. All other usage needs to use a direct handshake for safety.
1539 if (java_thread == JavaThread::current()) {
1540 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1541 } else {
1542 // Get stack trace with handshake
1543 GetStackTraceClosure op(this, start_depth, max_frame_count, frame_buffer, count_ptr);
1544 bool executed = Handshake::execute_direct(&op, java_thread);
1545 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1546 }
1547
1548 return err;
1549 } /* end GetStackTrace */
1550
1551
1552 // max_frame_count - pre-checked to be greater than or equal to 0
1553 // stack_info_ptr - pre-checked for NULL
1554 // thread_count_ptr - pre-checked for NULL
1555 jvmtiError
1556 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1557 jvmtiError err = JVMTI_ERROR_NONE;
1558 JavaThread* calling_thread = JavaThread::current();
1559
1560 // JVMTI get stack traces at safepoint.
1561 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1562 VMThread::execute(&op);
1563 *thread_count_ptr = op.final_thread_count();
1564 *stack_info_ptr = op.stack_info();
1565 err = op.result();
1566 return err;
1567 } /* end GetAllStackTraces */
1568
1569
1570 // thread_count - pre-checked to be greater than or equal to 0
1571 // thread_list - pre-checked for NULL
1572 // max_frame_count - pre-checked to be greater than or equal to 0
1573 // stack_info_ptr - pre-checked for NULL
1574 jvmtiError
1575 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1576 jvmtiError err = JVMTI_ERROR_NONE;
1577
1578 if (thread_count == 1) {
1579 // Use direct handshake if we need to get only one stack trace.
1580 JavaThread *current_thread = JavaThread::current();
1581 ThreadsListHandle tlh(current_thread);
1582 JavaThread *java_thread;
1583 err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), *thread_list, &java_thread, NULL);
1584 if (err != JVMTI_ERROR_NONE) {
1585 return err;
1586 }
1587
1588 GetSingleStackTraceClosure op(this, current_thread, max_frame_count);
1589 bool executed = Handshake::execute_direct(&op, java_thread);
1590 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE;
1591 *stack_info_ptr = op.stack_info();
1592 } else {
1593 // JVMTI get stack traces at safepoint.
1594 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1595 VMThread::execute(&op);
1596 err = op.result();
1597 *stack_info_ptr = op.stack_info();
1598 }
1599 return err;
1600 } /* end GetThreadListStackTraces */
1601
1602
1603 // Threads_lock NOT held, java_thread not protected by lock
1604 // java_thread - pre-checked
1605 // count_ptr - pre-checked for NULL
1606 jvmtiError
1607 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1608 jvmtiError err = JVMTI_ERROR_NONE;
1609
1610 // retrieve or create JvmtiThreadState.
1611 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1612 if (state == NULL) {
1613 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1614 }
1615
1616 // It is only safe to perform the direct operation on the current
1617 // thread. All other usage needs to use a vm-safepoint-op for safety.
1618 if (java_thread == JavaThread::current()) {
1619 err = get_frame_count(state, count_ptr);
1620 } else {
1621 // get java stack frame count at safepoint.
1622 VM_GetFrameCount op(this, state, count_ptr);
1623 VMThread::execute(&op);
1624 err = op.result();
1625 }
1626 return err;
1627 } /* end GetFrameCount */
1628
1629
1630 // Threads_lock NOT held, java_thread not protected by lock
1631 // java_thread - pre-checked
1632 jvmtiError
1633 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1634 JavaThread* current_thread = JavaThread::current();
1635 HandleMark hm(current_thread);
1636 uint32_t debug_bits = 0;
1637
1638 // retrieve or create the state
1639 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1640 if (state == NULL) {
1641 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1642 }
1643
1644 // Check if java_thread is fully suspended
1645 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1646 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1647 }
1648 // Check to see if a PopFrame was already in progress
1649 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1650 // Probably possible for JVMTI clients to trigger this, but the
1651 // JPDA backend shouldn't allow this to happen
1652 return JVMTI_ERROR_INTERNAL;
1653 }
1654
1655 {
1656 // Was workaround bug
1657 // 4812902: popFrame hangs if the method is waiting at a synchronize
1658 // Catch this condition and return an error to avoid hanging.
1659 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1660 OSThread* osThread = java_thread->osthread();
1661 if (osThread->get_state() == MONITOR_WAIT) {
1662 return JVMTI_ERROR_OPAQUE_FRAME;
1663 }
1664 }
1665
1666 {
1667 ResourceMark rm(current_thread);
1668 // Check if there are more than one Java frame in this thread, that the top two frames
1669 // are Java (not native) frames, and that there is no intervening VM frame
1670 int frame_count = 0;
1671 bool is_interpreted[2];
1672 intptr_t *frame_sp[2];
1673 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1674 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1675 methodHandle mh(current_thread, vfs.method());
1676 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1677 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1678 frame_sp[frame_count] = vfs.frame_id();
1679 if (++frame_count > 1) break;
1680 }
1681 if (frame_count < 2) {
1682 // We haven't found two adjacent non-native Java frames on the top.
1683 // There can be two situations here:
1684 // 1. There are no more java frames
1685 // 2. Two top java frames are separated by non-java native frames
1686 if(vframeFor(java_thread, 1) == NULL) {
1687 return JVMTI_ERROR_NO_MORE_FRAMES;
1688 } else {
1689 // Intervening non-java native or VM frames separate java frames.
1690 // Current implementation does not support this. See bug #5031735.
1691 // In theory it is possible to pop frames in such cases.
1692 return JVMTI_ERROR_OPAQUE_FRAME;
1693 }
1694 }
1695
1696 // If any of the top 2 frames is a compiled one, need to deoptimize it
1697 for (int i = 0; i < 2; i++) {
1698 if (!is_interpreted[i]) {
1699 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1700 }
1701 }
1702
1703 // Update the thread state to reflect that the top frame is popped
1704 // so that cur_stack_depth is maintained properly and all frameIDs
1705 // are invalidated.
1706 // The current frame will be popped later when the suspended thread
1707 // is resumed and right before returning from VM to Java.
1708 // (see call_VM_base() in assembler_<cpu>.cpp).
1709
1710 // It's fine to update the thread state here because no JVMTI events
1711 // shall be posted for this PopFrame.
1712
1713 // It is only safe to perform the direct operation on the current
1714 // thread. All other usage needs to use a vm-safepoint-op for safety.
1715 if (java_thread == JavaThread::current()) {
1716 state->update_for_pop_top_frame();
1717 } else {
1718 VM_UpdateForPopTopFrame op(state);
1719 VMThread::execute(&op);
1720 jvmtiError err = op.result();
1721 if (err != JVMTI_ERROR_NONE) {
1722 return err;
1723 }
1724 }
1725
1726 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1727 // Set pending step flag for this popframe and it is cleared when next
1728 // step event is posted.
1729 state->set_pending_step_for_popframe();
1730 }
1731
1732 return JVMTI_ERROR_NONE;
1733 } /* end PopFrame */
1734
1735
1736 // Threads_lock NOT held, java_thread not protected by lock
1737 // java_thread - pre-checked
1738 // java_thread - unchecked
1739 // depth - pre-checked as non-negative
1740 // method_ptr - pre-checked for NULL
1741 // location_ptr - pre-checked for NULL
1742 jvmtiError
1743 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1744 jvmtiError err = JVMTI_ERROR_NONE;
1745
1746 // It is only safe to perform the direct operation on the current
1747 // thread. All other usage needs to use a vm-safepoint-op for safety.
1748 if (java_thread == JavaThread::current()) {
1749 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1750 } else {
1751 // JVMTI get java stack frame location at safepoint.
1752 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1753 VMThread::execute(&op);
1754 err = op.result();
1755 }
1756 return err;
1757 } /* end GetFrameLocation */
1758
1759
1760 // Threads_lock NOT held, java_thread not protected by lock
1761 // java_thread - pre-checked
1762 // java_thread - unchecked
1763 // depth - pre-checked as non-negative
1764 jvmtiError
1765 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1766 jvmtiError err = JVMTI_ERROR_NONE;
1767 ResourceMark rm;
1768 uint32_t debug_bits = 0;
1769
1770 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1771 if (state == NULL) {
1772 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1773 }
1774
1775 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1776 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1777 }
1778
1779 if (TraceJVMTICalls) {
1780 JvmtiSuspendControl::print();
1781 }
1782
1783 vframe *vf = vframeFor(java_thread, depth);
1784 if (vf == NULL) {
1785 return JVMTI_ERROR_NO_MORE_FRAMES;
1786 }
1787
1788 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1789 return JVMTI_ERROR_OPAQUE_FRAME;
1790 }
1791
1792 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1793
1794 // It is only safe to perform the direct operation on the current
1795 // thread. All other usage needs to use a vm-safepoint-op for safety.
1796 if (java_thread == JavaThread::current()) {
1797 int frame_number = state->count_frames() - depth;
1798 state->env_thread_state(this)->set_frame_pop(frame_number);
1799 } else {
1800 VM_SetFramePop op(this, state, depth);
1801 VMThread::execute(&op);
1802 err = op.result();
1803 }
1804 return err;
1805 } /* end NotifyFramePop */
1806
1807
1808 //
1809 // Force Early Return functions
1810 //
1811
1812 // Threads_lock NOT held, java_thread not protected by lock
1813 // java_thread - pre-checked
1814 jvmtiError
1815 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1816 jvalue val;
1817 val.l = value;
1818 return force_early_return(java_thread, val, atos);
1819 } /* end ForceEarlyReturnObject */
1820
1821
1822 // Threads_lock NOT held, java_thread not protected by lock
1823 // java_thread - pre-checked
1824 jvmtiError
1825 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1826 jvalue val;
1827 val.i = value;
1828 return force_early_return(java_thread, val, itos);
1829 } /* end ForceEarlyReturnInt */
1830
1831
1832 // Threads_lock NOT held, java_thread not protected by lock
1833 // java_thread - pre-checked
1834 jvmtiError
1835 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1836 jvalue val;
1837 val.j = value;
1838 return force_early_return(java_thread, val, ltos);
1839 } /* end ForceEarlyReturnLong */
1840
1841
1842 // Threads_lock NOT held, java_thread not protected by lock
1843 // java_thread - pre-checked
1844 jvmtiError
1845 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1846 jvalue val;
1847 val.f = value;
1848 return force_early_return(java_thread, val, ftos);
1849 } /* end ForceEarlyReturnFloat */
1850
1851
1852 // Threads_lock NOT held, java_thread not protected by lock
1853 // java_thread - pre-checked
1854 jvmtiError
1855 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1856 jvalue val;
1857 val.d = value;
1858 return force_early_return(java_thread, val, dtos);
1859 } /* end ForceEarlyReturnDouble */
1860
1861
1862 // Threads_lock NOT held, java_thread not protected by lock
1863 // java_thread - pre-checked
1864 jvmtiError
1865 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1866 jvalue val;
1867 val.j = 0L;
1868 return force_early_return(java_thread, val, vtos);
1869 } /* end ForceEarlyReturnVoid */
1870
1871
1872 //
1873 // Heap functions
1874 //
1875
1876 // klass - NULL is a valid value, must be checked
1877 // initial_object - NULL is a valid value, must be checked
1878 // callbacks - pre-checked for NULL
1879 // user_data - NULL is a valid value, must be checked
1880 jvmtiError
1881 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1882 // check klass if provided
1883 Klass* k = NULL;
1884 if (klass != NULL) {
1885 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1886 if (k_mirror == NULL) {
1887 return JVMTI_ERROR_INVALID_CLASS;
1888 }
1889 if (java_lang_Class::is_primitive(k_mirror)) {
1890 return JVMTI_ERROR_NONE;
1891 }
1892 k = java_lang_Class::as_Klass(k_mirror);
1893 if (klass == NULL) {
1894 return JVMTI_ERROR_INVALID_CLASS;
1895 }
1896 }
1897
1898 if (initial_object != NULL) {
1899 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1900 if (init_obj == NULL) {
1901 return JVMTI_ERROR_INVALID_OBJECT;
1902 }
1903 }
1904
1905 Thread *thread = Thread::current();
1906 HandleMark hm(thread);
1907
1908 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1909 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1910 return JVMTI_ERROR_NONE;
1911 } /* end FollowReferences */
1912
1913
1914 // klass - NULL is a valid value, must be checked
1915 // callbacks - pre-checked for NULL
1916 // user_data - NULL is a valid value, must be checked
1917 jvmtiError
1918 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1919 // check klass if provided
1920 Klass* k = NULL;
1921 if (klass != NULL) {
1922 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1923 if (k_mirror == NULL) {
1924 return JVMTI_ERROR_INVALID_CLASS;
1925 }
1926 if (java_lang_Class::is_primitive(k_mirror)) {
1927 return JVMTI_ERROR_NONE;
1928 }
1929 k = java_lang_Class::as_Klass(k_mirror);
1930 if (k == NULL) {
1931 return JVMTI_ERROR_INVALID_CLASS;
1932 }
1933 }
1934
1935 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1936 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1937 return JVMTI_ERROR_NONE;
1938 } /* end IterateThroughHeap */
1939
1940
1941 // tag_ptr - pre-checked for NULL
1942 jvmtiError
1943 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1944 oop o = JNIHandles::resolve_external_guard(object);
1945 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1946 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1947 return JVMTI_ERROR_NONE;
1948 } /* end GetTag */
1949
1950
1951 jvmtiError
1952 JvmtiEnv::SetTag(jobject object, jlong tag) {
1953 oop o = JNIHandles::resolve_external_guard(object);
1954 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1955 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1956 return JVMTI_ERROR_NONE;
1957 } /* end SetTag */
1958
1959
1960 // tag_count - pre-checked to be greater than or equal to 0
1961 // tags - pre-checked for NULL
1962 // count_ptr - pre-checked for NULL
1963 // object_result_ptr - NULL is a valid value, must be checked
1964 // tag_result_ptr - NULL is a valid value, must be checked
1965 jvmtiError
1966 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1967 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1968 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1969 } /* end GetObjectsWithTags */
1970
1971
1972 jvmtiError
1973 JvmtiEnv::ForceGarbageCollection() {
1974 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1975 return JVMTI_ERROR_NONE;
1976 } /* end ForceGarbageCollection */
1977
1978
1979 //
1980 // Heap (1.0) functions
1981 //
1982
1983 // object_reference_callback - pre-checked for NULL
1984 // user_data - NULL is a valid value, must be checked
1985 jvmtiError
1986 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1987 oop o = JNIHandles::resolve_external_guard(object);
1988 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1989 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1990 return JVMTI_ERROR_NONE;
1991 } /* end IterateOverObjectsReachableFromObject */
1992
1993
1994 // heap_root_callback - NULL is a valid value, must be checked
1995 // stack_ref_callback - NULL is a valid value, must be checked
1996 // object_ref_callback - NULL is a valid value, must be checked
1997 // user_data - NULL is a valid value, must be checked
1998 jvmtiError
1999 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
2000 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
2001 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
2002 return JVMTI_ERROR_NONE;
2003 } /* end IterateOverReachableObjects */
2004
2005
2006 // heap_object_callback - pre-checked for NULL
2007 // user_data - NULL is a valid value, must be checked
2008 jvmtiError
2009 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2010 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
2011 Thread *thread = Thread::current();
2012 HandleMark hm(thread);
2013 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
2014 return JVMTI_ERROR_NONE;
2015 } /* end IterateOverHeap */
2016
2017
2018 // k_mirror - may be primitive, this must be checked
2019 // heap_object_callback - pre-checked for NULL
2020 // user_data - NULL is a valid value, must be checked
2021 jvmtiError
2022 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2023 if (java_lang_Class::is_primitive(k_mirror)) {
2024 // DO PRIMITIVE CLASS PROCESSING
2025 return JVMTI_ERROR_NONE;
2026 }
2027 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2028 if (klass == NULL) {
2029 return JVMTI_ERROR_INVALID_CLASS;
2030 }
2031 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2032 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2033 return JVMTI_ERROR_NONE;
2034 } /* end IterateOverInstancesOfClass */
2035
2036
2037 //
2038 // Local Variable functions
2039 //
2040
2041 // Threads_lock NOT held, java_thread not protected by lock
2042 // java_thread - pre-checked
2043 // java_thread - unchecked
2044 // depth - pre-checked as non-negative
2045 // value_ptr - pre-checked for NULL
2046 jvmtiError
2047 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2048 JavaThread* current_thread = JavaThread::current();
2049 // rm object is created to clean up the javaVFrame created in
2050 // doit_prologue(), but after doit() is finished with it.
2051 ResourceMark rm(current_thread);
2052
2053 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2054 VMThread::execute(&op);
2055 jvmtiError err = op.result();
2056 if (err != JVMTI_ERROR_NONE) {
2057 return err;
2058 } else {
2059 *value_ptr = op.value().l;
2060 return JVMTI_ERROR_NONE;
2061 }
2062 } /* end GetLocalObject */
2063
2064 // Threads_lock NOT held, java_thread not protected by lock
2065 // java_thread - pre-checked
2066 // java_thread - unchecked
2067 // depth - pre-checked as non-negative
2068 // value - pre-checked for NULL
2069 jvmtiError
2070 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2071 JavaThread* current_thread = JavaThread::current();
2072 // rm object is created to clean up the javaVFrame created in
2073 // doit_prologue(), but after doit() is finished with it.
2074 ResourceMark rm(current_thread);
2075
2076 VM_GetReceiver op(java_thread, current_thread, depth);
2077 VMThread::execute(&op);
2078 jvmtiError err = op.result();
2079 if (err != JVMTI_ERROR_NONE) {
2080 return err;
2081 } else {
2082 *value_ptr = op.value().l;
2083 return JVMTI_ERROR_NONE;
2084 }
2085 } /* end GetLocalInstance */
2086
2087
2088 // Threads_lock NOT held, java_thread not protected by lock
2089 // java_thread - pre-checked
2090 // java_thread - unchecked
2091 // depth - pre-checked as non-negative
2092 // value_ptr - pre-checked for NULL
2093 jvmtiError
2094 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2095 // rm object is created to clean up the javaVFrame created in
2096 // doit_prologue(), but after doit() is finished with it.
2097 ResourceMark rm;
2098
2099 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2100 VMThread::execute(&op);
2101 *value_ptr = op.value().i;
2102 return op.result();
2103 } /* end GetLocalInt */
2104
2105
2106 // Threads_lock NOT held, java_thread not protected by lock
2107 // java_thread - pre-checked
2108 // java_thread - unchecked
2109 // depth - pre-checked as non-negative
2110 // value_ptr - pre-checked for NULL
2111 jvmtiError
2112 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2113 // rm object is created to clean up the javaVFrame created in
2114 // doit_prologue(), but after doit() is finished with it.
2115 ResourceMark rm;
2116
2117 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2118 VMThread::execute(&op);
2119 *value_ptr = op.value().j;
2120 return op.result();
2121 } /* end GetLocalLong */
2122
2123
2124 // Threads_lock NOT held, java_thread not protected by lock
2125 // java_thread - pre-checked
2126 // java_thread - unchecked
2127 // depth - pre-checked as non-negative
2128 // value_ptr - pre-checked for NULL
2129 jvmtiError
2130 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2131 // rm object is created to clean up the javaVFrame created in
2132 // doit_prologue(), but after doit() is finished with it.
2133 ResourceMark rm;
2134
2135 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2136 VMThread::execute(&op);
2137 *value_ptr = op.value().f;
2138 return op.result();
2139 } /* end GetLocalFloat */
2140
2141
2142 // Threads_lock NOT held, java_thread not protected by lock
2143 // java_thread - pre-checked
2144 // java_thread - unchecked
2145 // depth - pre-checked as non-negative
2146 // value_ptr - pre-checked for NULL
2147 jvmtiError
2148 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2149 // rm object is created to clean up the javaVFrame created in
2150 // doit_prologue(), but after doit() is finished with it.
2151 ResourceMark rm;
2152
2153 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2154 VMThread::execute(&op);
2155 *value_ptr = op.value().d;
2156 return op.result();
2157 } /* end GetLocalDouble */
2158
2159
2160 // Threads_lock NOT held, java_thread not protected by lock
2161 // java_thread - pre-checked
2162 // java_thread - unchecked
2163 // depth - pre-checked as non-negative
2164 jvmtiError
2165 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2166 // rm object is created to clean up the javaVFrame created in
2167 // doit_prologue(), but after doit() is finished with it.
2168 ResourceMark rm;
2169 jvalue val;
2170 val.l = value;
2171 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2172 VMThread::execute(&op);
2173 return op.result();
2174 } /* end SetLocalObject */
2175
2176
2177 // Threads_lock NOT held, java_thread not protected by lock
2178 // java_thread - pre-checked
2179 // java_thread - unchecked
2180 // depth - pre-checked as non-negative
2181 jvmtiError
2182 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2183 // rm object is created to clean up the javaVFrame created in
2184 // doit_prologue(), but after doit() is finished with it.
2185 ResourceMark rm;
2186 jvalue val;
2187 val.i = value;
2188 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2189 VMThread::execute(&op);
2190 return op.result();
2191 } /* end SetLocalInt */
2192
2193
2194 // Threads_lock NOT held, java_thread not protected by lock
2195 // java_thread - pre-checked
2196 // java_thread - unchecked
2197 // depth - pre-checked as non-negative
2198 jvmtiError
2199 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2200 // rm object is created to clean up the javaVFrame created in
2201 // doit_prologue(), but after doit() is finished with it.
2202 ResourceMark rm;
2203 jvalue val;
2204 val.j = value;
2205 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2206 VMThread::execute(&op);
2207 return op.result();
2208 } /* end SetLocalLong */
2209
2210
2211 // Threads_lock NOT held, java_thread not protected by lock
2212 // java_thread - pre-checked
2213 // java_thread - unchecked
2214 // depth - pre-checked as non-negative
2215 jvmtiError
2216 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2217 // rm object is created to clean up the javaVFrame created in
2218 // doit_prologue(), but after doit() is finished with it.
2219 ResourceMark rm;
2220 jvalue val;
2221 val.f = value;
2222 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2223 VMThread::execute(&op);
2224 return op.result();
2225 } /* end SetLocalFloat */
2226
2227
2228 // Threads_lock NOT held, java_thread not protected by lock
2229 // java_thread - pre-checked
2230 // java_thread - unchecked
2231 // depth - pre-checked as non-negative
2232 jvmtiError
2233 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2234 // rm object is created to clean up the javaVFrame created in
2235 // doit_prologue(), but after doit() is finished with it.
2236 ResourceMark rm;
2237 jvalue val;
2238 val.d = value;
2239 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2240 VMThread::execute(&op);
2241 return op.result();
2242 } /* end SetLocalDouble */
2243
2244
2245 //
2246 // Breakpoint functions
2247 //
2248
2249 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2250 jvmtiError
2251 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2252 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2253 if (location < 0) { // simple invalid location check first
2254 return JVMTI_ERROR_INVALID_LOCATION;
2255 }
2256 // verify that the breakpoint is not past the end of the method
2257 if (location >= (jlocation) method_oop->code_size()) {
2258 return JVMTI_ERROR_INVALID_LOCATION;
2259 }
2260
2261 ResourceMark rm;
2262 JvmtiBreakpoint bp(method_oop, location);
2263 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2264 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2265 return JVMTI_ERROR_DUPLICATE;
2266
2267 if (TraceJVMTICalls) {
2268 jvmti_breakpoints.print();
2269 }
2270
2271 return JVMTI_ERROR_NONE;
2272 } /* end SetBreakpoint */
2273
2274
2275 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2276 jvmtiError
2277 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2278 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2279
2280 if (location < 0) { // simple invalid location check first
2281 return JVMTI_ERROR_INVALID_LOCATION;
2282 }
2283
2284 // verify that the breakpoint is not past the end of the method
2285 if (location >= (jlocation) method_oop->code_size()) {
2286 return JVMTI_ERROR_INVALID_LOCATION;
2287 }
2288
2289 JvmtiBreakpoint bp(method_oop, location);
2290
2291 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2292 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2293 return JVMTI_ERROR_NOT_FOUND;
2294
2295 if (TraceJVMTICalls) {
2296 jvmti_breakpoints.print();
2297 }
2298
2299 return JVMTI_ERROR_NONE;
2300 } /* end ClearBreakpoint */
2301
2302
2303 //
2304 // Watched Field functions
2305 //
2306
2307 jvmtiError
2308 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2309 // make sure we haven't set this watch before
2310 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2311 fdesc_ptr->set_is_field_access_watched(true);
2312
2313 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2314
2315 return JVMTI_ERROR_NONE;
2316 } /* end SetFieldAccessWatch */
2317
2318
2319 jvmtiError
2320 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2321 // make sure we have a watch to clear
2322 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2323 fdesc_ptr->set_is_field_access_watched(false);
2324
2325 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2326
2327 return JVMTI_ERROR_NONE;
2328 } /* end ClearFieldAccessWatch */
2329
2330
2331 jvmtiError
2332 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2333 // make sure we haven't set this watch before
2334 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2335 fdesc_ptr->set_is_field_modification_watched(true);
2336
2337 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2338
2339 return JVMTI_ERROR_NONE;
2340 } /* end SetFieldModificationWatch */
2341
2342
2343 jvmtiError
2344 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2345 // make sure we have a watch to clear
2346 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2347 fdesc_ptr->set_is_field_modification_watched(false);
2348
2349 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2350
2351 return JVMTI_ERROR_NONE;
2352 } /* end ClearFieldModificationWatch */
2353
2354 //
2355 // Class functions
2356 //
2357
2358
2359 // k_mirror - may be primitive, this must be checked
2360 // signature_ptr - NULL is a valid value, must be checked
2361 // generic_ptr - NULL is a valid value, must be checked
2362 jvmtiError
2363 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2364 ResourceMark rm;
2365 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2366 Klass* k = NULL;
2367 if (!isPrimitive) {
2368 k = java_lang_Class::as_Klass(k_mirror);
2369 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2370 }
2371 if (signature_ptr != NULL) {
2372 char* result = NULL;
2373 if (isPrimitive) {
2374 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2375 result = (char*) jvmtiMalloc(2);
2376 result[0] = tchar;
2377 result[1] = '\0';
2378 } else {
2379 const char* class_sig = k->signature_name();
2380 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2381 strcpy(result, class_sig);
2382 }
2383 *signature_ptr = result;
2384 }
2385 if (generic_ptr != NULL) {
2386 *generic_ptr = NULL;
2387 if (!isPrimitive && k->is_instance_klass()) {
2388 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2389 if (soo != NULL) {
2390 const char *gen_sig = soo->as_C_string();
2391 if (gen_sig != NULL) {
2392 char* gen_result;
2393 jvmtiError err = allocate(strlen(gen_sig) + 1,
2394 (unsigned char **)&gen_result);
2395 if (err != JVMTI_ERROR_NONE) {
2396 return err;
2397 }
2398 strcpy(gen_result, gen_sig);
2399 *generic_ptr = gen_result;
2400 }
2401 }
2402 }
2403 }
2404 return JVMTI_ERROR_NONE;
2405 } /* end GetClassSignature */
2406
2407
2408 // k_mirror - may be primitive, this must be checked
2409 // status_ptr - pre-checked for NULL
2410 jvmtiError
2411 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2412 jint result = 0;
2413 if (java_lang_Class::is_primitive(k_mirror)) {
2414 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2415 } else {
2416 Klass* k = java_lang_Class::as_Klass(k_mirror);
2417 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2418 result = k->jvmti_class_status();
2419 }
2420 *status_ptr = result;
2421
2422 return JVMTI_ERROR_NONE;
2423 } /* end GetClassStatus */
2424
2425
2426 // k_mirror - may be primitive, this must be checked
2427 // source_name_ptr - pre-checked for NULL
2428 jvmtiError
2429 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2430 if (java_lang_Class::is_primitive(k_mirror)) {
2431 return JVMTI_ERROR_ABSENT_INFORMATION;
2432 }
2433 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2434 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2435
2436 if (!k_klass->is_instance_klass()) {
2437 return JVMTI_ERROR_ABSENT_INFORMATION;
2438 }
2439
2440 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2441 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2442 {
2443 JavaThread* current_thread = JavaThread::current();
2444 ResourceMark rm(current_thread);
2445 const char* sfncp = (const char*) sfnOop->as_C_string();
2446 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2447 strcpy(*source_name_ptr, sfncp);
2448 }
2449
2450 return JVMTI_ERROR_NONE;
2451 } /* end GetSourceFileName */
2452
2453
2454 // k_mirror - may be primitive, this must be checked
2455 // modifiers_ptr - pre-checked for NULL
2456 jvmtiError
2457 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2458 JavaThread* current_thread = JavaThread::current();
2459 jint result = 0;
2460 if (!java_lang_Class::is_primitive(k_mirror)) {
2461 Klass* k = java_lang_Class::as_Klass(k_mirror);
2462 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2463 result = k->compute_modifier_flags(current_thread);
2464 JavaThread* THREAD = current_thread; // pass to macros
2465 if (HAS_PENDING_EXCEPTION) {
2466 CLEAR_PENDING_EXCEPTION;
2467 return JVMTI_ERROR_INTERNAL;
2468 };
2469
2470 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2471 if(k->is_super()) {
2472 result |= JVM_ACC_SUPER;
2473 }
2474 } else {
2475 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2476 }
2477 *modifiers_ptr = result;
2478
2479 return JVMTI_ERROR_NONE;
2480 } /* end GetClassModifiers */
2481
2482
2483 // k_mirror - may be primitive, this must be checked
2484 // method_count_ptr - pre-checked for NULL
2485 // methods_ptr - pre-checked for NULL
2486 jvmtiError
2487 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2488 JavaThread* current_thread = JavaThread::current();
2489 HandleMark hm(current_thread);
2490
2491 if (java_lang_Class::is_primitive(k_mirror)) {
2492 *method_count_ptr = 0;
2493 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2494 return JVMTI_ERROR_NONE;
2495 }
2496 Klass* k = java_lang_Class::as_Klass(k_mirror);
2497 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2498
2499 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2500 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2501 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2502 }
2503
2504 if (!k->is_instance_klass()) {
2505 *method_count_ptr = 0;
2506 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2507 return JVMTI_ERROR_NONE;
2508 }
2509 InstanceKlass* ik = InstanceKlass::cast(k);
2510 // Allocate the result and fill it in
2511 int result_length = ik->methods()->length();
2512 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2513 int index;
2514 bool jmethodids_found = true;
2515
2516 if (JvmtiExport::can_maintain_original_method_order()) {
2517 // Use the original method ordering indices stored in the class, so we can emit
2518 // jmethodIDs in the order they appeared in the class file
2519 for (index = 0; index < result_length; index++) {
2520 Method* m = ik->methods()->at(index);
2521 int original_index = ik->method_ordering()->at(index);
2522 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2523 jmethodID id;
2524 if (jmethodids_found) {
2525 id = m->find_jmethod_id_or_null();
2526 if (id == NULL) {
2527 // If we find an uninitialized value, make sure there is
2528 // enough space for all the uninitialized values we might
2529 // find.
2530 ik->ensure_space_for_methodids(index);
2531 jmethodids_found = false;
2532 id = m->jmethod_id();
2533 }
2534 } else {
2535 id = m->jmethod_id();
2536 }
2537 result_list[original_index] = id;
2538 }
2539 } else {
2540 // otherwise just copy in any order
2541 for (index = 0; index < result_length; index++) {
2542 Method* m = ik->methods()->at(index);
2543 jmethodID id;
2544 if (jmethodids_found) {
2545 id = m->find_jmethod_id_or_null();
2546 if (id == NULL) {
2547 // If we find an uninitialized value, make sure there is
2548 // enough space for all the uninitialized values we might
2549 // find.
2550 ik->ensure_space_for_methodids(index);
2551 jmethodids_found = false;
2552 id = m->jmethod_id();
2553 }
2554 } else {
2555 id = m->jmethod_id();
2556 }
2557 result_list[index] = id;
2558 }
2559 }
2560 // Fill in return value.
2561 *method_count_ptr = result_length;
2562 *methods_ptr = result_list;
2563
2564 return JVMTI_ERROR_NONE;
2565 } /* end GetClassMethods */
2566
2567
2568 // k_mirror - may be primitive, this must be checked
2569 // field_count_ptr - pre-checked for NULL
2570 // fields_ptr - pre-checked for NULL
2571 jvmtiError
2572 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2573 if (java_lang_Class::is_primitive(k_mirror)) {
2574 *field_count_ptr = 0;
2575 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2576 return JVMTI_ERROR_NONE;
2577 }
2578 JavaThread* current_thread = JavaThread::current();
2579 HandleMark hm(current_thread);
2580 Klass* k = java_lang_Class::as_Klass(k_mirror);
2581 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2582
2583 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2584 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2585 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2586 }
2587
2588 if (!k->is_instance_klass()) {
2589 *field_count_ptr = 0;
2590 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2591 return JVMTI_ERROR_NONE;
2592 }
2593
2594
2595 InstanceKlass* ik = InstanceKlass::cast(k);
2596
2597 int result_count = 0;
2598 // First, count the fields.
2599 FilteredFieldStream flds(ik, true, true);
2600 result_count = flds.field_count();
2601
2602 // Allocate the result and fill it in
2603 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2604 // The JVMTI spec requires fields in the order they occur in the class file,
2605 // this is the reverse order of what FieldStream hands out.
2606 int id_index = (result_count - 1);
2607
2608 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2609 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2610 ik, src_st.offset(),
2611 src_st.access_flags().is_static());
2612 }
2613 assert(id_index == -1, "just checking");
2614 // Fill in the results
2615 *field_count_ptr = result_count;
2616 *fields_ptr = result_list;
2617
2618 return JVMTI_ERROR_NONE;
2619 } /* end GetClassFields */
2620
2621
2622 // k_mirror - may be primitive, this must be checked
2623 // interface_count_ptr - pre-checked for NULL
2624 // interfaces_ptr - pre-checked for NULL
2625 jvmtiError
2626 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2627 {
2628 if (java_lang_Class::is_primitive(k_mirror)) {
2629 *interface_count_ptr = 0;
2630 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2631 return JVMTI_ERROR_NONE;
2632 }
2633 JavaThread* current_thread = JavaThread::current();
2634 HandleMark hm(current_thread);
2635 Klass* k = java_lang_Class::as_Klass(k_mirror);
2636 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2637
2638 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2639 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2640 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2641
2642 if (!k->is_instance_klass()) {
2643 *interface_count_ptr = 0;
2644 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2645 return JVMTI_ERROR_NONE;
2646 }
2647
2648 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2649 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2650 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2651 for (int i_index = 0; i_index < result_length; i_index += 1) {
2652 InstanceKlass* klass_at = interface_list->at(i_index);
2653 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2654 assert(klass_at->is_interface(), "interfaces must be interfaces");
2655 oop mirror_at = klass_at->java_mirror();
2656 Handle handle_at = Handle(current_thread, mirror_at);
2657 result_list[i_index] = (jclass) jni_reference(handle_at);
2658 }
2659 *interface_count_ptr = result_length;
2660 *interfaces_ptr = result_list;
2661 }
2662
2663 return JVMTI_ERROR_NONE;
2664 } /* end GetImplementedInterfaces */
2665
2666
2667 // k_mirror - may be primitive, this must be checked
2668 // minor_version_ptr - pre-checked for NULL
2669 // major_version_ptr - pre-checked for NULL
2670 jvmtiError
2671 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2672 if (java_lang_Class::is_primitive(k_mirror)) {
2673 return JVMTI_ERROR_ABSENT_INFORMATION;
2674 }
2675 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2676
2677 jint status = klass->jvmti_class_status();
2678 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2679 return JVMTI_ERROR_INVALID_CLASS;
2680 }
2681 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2682 return JVMTI_ERROR_ABSENT_INFORMATION;
2683 }
2684
2685 InstanceKlass* ik = InstanceKlass::cast(klass);
2686 *minor_version_ptr = ik->minor_version();
2687 *major_version_ptr = ik->major_version();
2688
2689 return JVMTI_ERROR_NONE;
2690 } /* end GetClassVersionNumbers */
2691
2692
2693 // k_mirror - may be primitive, this must be checked
2694 // constant_pool_count_ptr - pre-checked for NULL
2695 // constant_pool_byte_count_ptr - pre-checked for NULL
2696 // constant_pool_bytes_ptr - pre-checked for NULL
2697 jvmtiError
2698 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2699 if (java_lang_Class::is_primitive(k_mirror)) {
2700 return JVMTI_ERROR_ABSENT_INFORMATION;
2701 }
2702
2703 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2704 Thread *thread = Thread::current();
2705 ResourceMark rm(thread);
2706
2707 jint status = klass->jvmti_class_status();
2708 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2709 return JVMTI_ERROR_INVALID_CLASS;
2710 }
2711 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2712 return JVMTI_ERROR_ABSENT_INFORMATION;
2713 }
2714
2715 InstanceKlass* ik = InstanceKlass::cast(klass);
2716 JvmtiConstantPoolReconstituter reconstituter(ik);
2717 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2718 return reconstituter.get_error();
2719 }
2720
2721 unsigned char *cpool_bytes;
2722 int cpool_size = reconstituter.cpool_size();
2723 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2724 return reconstituter.get_error();
2725 }
2726 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2727 if (res != JVMTI_ERROR_NONE) {
2728 return res;
2729 }
2730 reconstituter.copy_cpool_bytes(cpool_bytes);
2731 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2732 return reconstituter.get_error();
2733 }
2734
2735 constantPoolHandle constants(thread, ik->constants());
2736 *constant_pool_count_ptr = constants->length();
2737 *constant_pool_byte_count_ptr = cpool_size;
2738 *constant_pool_bytes_ptr = cpool_bytes;
2739
2740 return JVMTI_ERROR_NONE;
2741 } /* end GetConstantPool */
2742
2743
2744 // k_mirror - may be primitive, this must be checked
2745 // is_interface_ptr - pre-checked for NULL
2746 jvmtiError
2747 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2748 {
2749 bool result = false;
2750 if (!java_lang_Class::is_primitive(k_mirror)) {
2751 Klass* k = java_lang_Class::as_Klass(k_mirror);
2752 if (k != NULL && k->is_interface()) {
2753 result = true;
2754 }
2755 }
2756 *is_interface_ptr = result;
2757 }
2758
2759 return JVMTI_ERROR_NONE;
2760 } /* end IsInterface */
2761
2762
2763 // k_mirror - may be primitive, this must be checked
2764 // is_array_class_ptr - pre-checked for NULL
2765 jvmtiError
2766 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2767 {
2768 bool result = false;
2769 if (!java_lang_Class::is_primitive(k_mirror)) {
2770 Klass* k = java_lang_Class::as_Klass(k_mirror);
2771 if (k != NULL && k->is_array_klass()) {
2772 result = true;
2773 }
2774 }
2775 *is_array_class_ptr = result;
2776 }
2777
2778 return JVMTI_ERROR_NONE;
2779 } /* end IsArrayClass */
2780
2781
2782 // k_mirror - may be primitive, this must be checked
2783 // classloader_ptr - pre-checked for NULL
2784 jvmtiError
2785 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2786 {
2787 if (java_lang_Class::is_primitive(k_mirror)) {
2788 *classloader_ptr = (jclass) jni_reference(Handle());
2789 return JVMTI_ERROR_NONE;
2790 }
2791 JavaThread* current_thread = JavaThread::current();
2792 HandleMark hm(current_thread);
2793 Klass* k = java_lang_Class::as_Klass(k_mirror);
2794 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2795
2796 oop result_oop = k->class_loader();
2797 if (result_oop == NULL) {
2798 *classloader_ptr = (jclass) jni_reference(Handle());
2799 return JVMTI_ERROR_NONE;
2800 }
2801 Handle result_handle = Handle(current_thread, result_oop);
2802 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2803 *classloader_ptr = result_jnihandle;
2804 }
2805 return JVMTI_ERROR_NONE;
2806 } /* end GetClassLoader */
2807
2808
2809 // k_mirror - may be primitive, this must be checked
2810 // source_debug_extension_ptr - pre-checked for NULL
2811 jvmtiError
2812 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2813 {
2814 if (java_lang_Class::is_primitive(k_mirror)) {
2815 return JVMTI_ERROR_ABSENT_INFORMATION;
2816 }
2817 Klass* k = java_lang_Class::as_Klass(k_mirror);
2818 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2819 if (!k->is_instance_klass()) {
2820 return JVMTI_ERROR_ABSENT_INFORMATION;
2821 }
2822 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2823 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2824
2825 {
2826 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2827 strcpy(*source_debug_extension_ptr, sde);
2828 }
2829 }
2830
2831 return JVMTI_ERROR_NONE;
2832 } /* end GetSourceDebugExtension */
2833
2834 //
2835 // Object functions
2836 //
2837
2838 // hash_code_ptr - pre-checked for NULL
2839 jvmtiError
2840 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2841 oop mirror = JNIHandles::resolve_external_guard(object);
2842 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2843 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2844
2845 {
2846 jint result = (jint) mirror->identity_hash();
2847 *hash_code_ptr = result;
2848 }
2849 return JVMTI_ERROR_NONE;
2850 } /* end GetObjectHashCode */
2851
2852
2853 // info_ptr - pre-checked for NULL
2854 jvmtiError
2855 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2856 // This needs to be performed at a safepoint to gather stable data
2857 // because monitor owner / waiters might not be suspended.
2858 VM_GetObjectMonitorUsage op(this, JavaThread::current(), object, info_ptr);
2859 VMThread::execute(&op);
2860 return op.result();
2861 } /* end GetObjectMonitorUsage */
2862
2863
2864 //
2865 // Field functions
2866 //
2867
2868 // name_ptr - NULL is a valid value, must be checked
2869 // signature_ptr - NULL is a valid value, must be checked
2870 // generic_ptr - NULL is a valid value, must be checked
2871 jvmtiError
2872 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2873 JavaThread* current_thread = JavaThread::current();
2874 ResourceMark rm(current_thread);
2875 if (name_ptr == NULL) {
2876 // just don't return the name
2877 } else {
2878 const char* fieldName = fdesc_ptr->name()->as_C_string();
2879 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2880 if (*name_ptr == NULL)
2881 return JVMTI_ERROR_OUT_OF_MEMORY;
2882 strcpy(*name_ptr, fieldName);
2883 }
2884 if (signature_ptr== NULL) {
2885 // just don't return the signature
2886 } else {
2887 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2888 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2889 if (*signature_ptr == NULL)
2890 return JVMTI_ERROR_OUT_OF_MEMORY;
2891 strcpy(*signature_ptr, fieldSignature);
2892 }
2893 if (generic_ptr != NULL) {
2894 *generic_ptr = NULL;
2895 Symbol* soop = fdesc_ptr->generic_signature();
2896 if (soop != NULL) {
2897 const char* gen_sig = soop->as_C_string();
2898 if (gen_sig != NULL) {
2899 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2900 if (err != JVMTI_ERROR_NONE) {
2901 return err;
2902 }
2903 strcpy(*generic_ptr, gen_sig);
2904 }
2905 }
2906 }
2907 return JVMTI_ERROR_NONE;
2908 } /* end GetFieldName */
2909
2910
2911 // declaring_class_ptr - pre-checked for NULL
2912 jvmtiError
2913 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2914
2915 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2916 return JVMTI_ERROR_NONE;
2917 } /* end GetFieldDeclaringClass */
2918
2919
2920 // modifiers_ptr - pre-checked for NULL
2921 jvmtiError
2922 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2923
2924 AccessFlags resultFlags = fdesc_ptr->access_flags();
2925 jint result = resultFlags.as_int();
2926 *modifiers_ptr = result;
2927
2928 return JVMTI_ERROR_NONE;
2929 } /* end GetFieldModifiers */
2930
2931
2932 // is_synthetic_ptr - pre-checked for NULL
2933 jvmtiError
2934 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2935 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2936 return JVMTI_ERROR_NONE;
2937 } /* end IsFieldSynthetic */
2938
2939
2940 //
2941 // Method functions
2942 //
2943
2944 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2945 // name_ptr - NULL is a valid value, must be checked
2946 // signature_ptr - NULL is a valid value, must be checked
2947 // generic_ptr - NULL is a valid value, must be checked
2948 jvmtiError
2949 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2950 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2951 JavaThread* current_thread = JavaThread::current();
2952
2953 ResourceMark rm(current_thread); // get the utf8 name and signature
2954 if (name_ptr == NULL) {
2955 // just don't return the name
2956 } else {
2957 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2958 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2959 strcpy(*name_ptr, utf8_name);
2960 }
2961 if (signature_ptr == NULL) {
2962 // just don't return the signature
2963 } else {
2964 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2965 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2966 strcpy(*signature_ptr, utf8_signature);
2967 }
2968
2969 if (generic_ptr != NULL) {
2970 *generic_ptr = NULL;
2971 Symbol* soop = method_oop->generic_signature();
2972 if (soop != NULL) {
2973 const char* gen_sig = soop->as_C_string();
2974 if (gen_sig != NULL) {
2975 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2976 if (err != JVMTI_ERROR_NONE) {
2977 return err;
2978 }
2979 strcpy(*generic_ptr, gen_sig);
2980 }
2981 }
2982 }
2983 return JVMTI_ERROR_NONE;
2984 } /* end GetMethodName */
2985
2986
2987 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2988 // declaring_class_ptr - pre-checked for NULL
2989 jvmtiError
2990 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2991 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2992 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2993 return JVMTI_ERROR_NONE;
2994 } /* end GetMethodDeclaringClass */
2995
2996
2997 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2998 // modifiers_ptr - pre-checked for NULL
2999 jvmtiError
3000 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
3001 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3002 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
3003 return JVMTI_ERROR_NONE;
3004 } /* end GetMethodModifiers */
3005
3006
3007 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3008 // max_ptr - pre-checked for NULL
3009 jvmtiError
3010 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
3011 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3012 // get max stack
3013 (*max_ptr) = method_oop->max_locals();
3014 return JVMTI_ERROR_NONE;
3015 } /* end GetMaxLocals */
3016
3017
3018 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3019 // size_ptr - pre-checked for NULL
3020 jvmtiError
3021 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3022 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3023 // get size of arguments
3024
3025 (*size_ptr) = method_oop->size_of_parameters();
3026 return JVMTI_ERROR_NONE;
3027 } /* end GetArgumentsSize */
3028
3029
3030 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3031 // entry_count_ptr - pre-checked for NULL
3032 // table_ptr - pre-checked for NULL
3033 jvmtiError
3034 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3035 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3036 if (!method_oop->has_linenumber_table()) {
3037 return (JVMTI_ERROR_ABSENT_INFORMATION);
3038 }
3039
3040 // The line number table is compressed so we don't know how big it is until decompressed.
3041 // Decompression is really fast so we just do it twice.
3042
3043 // Compute size of table
3044 jint num_entries = 0;
3045 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3046 while (stream.read_pair()) {
3047 num_entries++;
3048 }
3049 jvmtiLineNumberEntry *jvmti_table =
3050 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3051
3052 // Fill jvmti table
3053 if (num_entries > 0) {
3054 int index = 0;
3055 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3056 while (stream.read_pair()) {
3057 jvmti_table[index].start_location = (jlocation) stream.bci();
3058 jvmti_table[index].line_number = (jint) stream.line();
3059 index++;
3060 }
3061 assert(index == num_entries, "sanity check");
3062 }
3063
3064 // Set up results
3065 (*entry_count_ptr) = num_entries;
3066 (*table_ptr) = jvmti_table;
3067
3068 return JVMTI_ERROR_NONE;
3069 } /* end GetLineNumberTable */
3070
3071
3072 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3073 // start_location_ptr - pre-checked for NULL
3074 // end_location_ptr - pre-checked for NULL
3075 jvmtiError
3076 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3077
3078 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3079 // get start and end location
3080 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3081 if (method_oop->code_size() == 0) {
3082 // there is no code so there is no start location
3083 (*start_location_ptr) = (jlocation)(-1);
3084 } else {
3085 (*start_location_ptr) = (jlocation)(0);
3086 }
3087
3088 return JVMTI_ERROR_NONE;
3089 } /* end GetMethodLocation */
3090
3091
3092 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3093 // entry_count_ptr - pre-checked for NULL
3094 // table_ptr - pre-checked for NULL
3095 jvmtiError
3096 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3097
3098 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3099 JavaThread* current_thread = JavaThread::current();
3100
3101 // does the klass have any local variable information?
3102 InstanceKlass* ik = method_oop->method_holder();
3103 if (!ik->access_flags().has_localvariable_table()) {
3104 return (JVMTI_ERROR_ABSENT_INFORMATION);
3105 }
3106
3107 ConstantPool* constants = method_oop->constants();
3108 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3109
3110 // in the vm localvariable table representation, 6 consecutive elements in the table
3111 // represent a 6-tuple of shorts
3112 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3113 jint num_entries = method_oop->localvariable_table_length();
3114 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3115 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3116
3117 if (num_entries > 0) {
3118 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3119 for (int i = 0; i < num_entries; i++) {
3120 // get the 5 tuple information from the vm table
3121 jlocation start_location = (jlocation) table[i].start_bci;
3122 jint length = (jint) table[i].length;
3123 int name_index = (int) table[i].name_cp_index;
3124 int signature_index = (int) table[i].descriptor_cp_index;
3125 int generic_signature_index = (int) table[i].signature_cp_index;
3126 jint slot = (jint) table[i].slot;
3127
3128 // get utf8 name and signature
3129 char *name_buf = NULL;
3130 char *sig_buf = NULL;
3131 char *gen_sig_buf = NULL;
3132 {
3133 ResourceMark rm(current_thread);
3134
3135 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3136 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3137 strcpy(name_buf, utf8_name);
3138
3139 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3140 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3141 strcpy(sig_buf, utf8_signature);
3142
3143 if (generic_signature_index > 0) {
3144 const char *utf8_gen_sign = (const char *)
3145 constants->symbol_at(generic_signature_index)->as_utf8();
3146 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3147 strcpy(gen_sig_buf, utf8_gen_sign);
3148 }
3149 }
3150
3151 // fill in the jvmti local variable table
3152 jvmti_table[i].start_location = start_location;
3153 jvmti_table[i].length = length;
3154 jvmti_table[i].name = name_buf;
3155 jvmti_table[i].signature = sig_buf;
3156 jvmti_table[i].generic_signature = gen_sig_buf;
3157 jvmti_table[i].slot = slot;
3158 }
3159 }
3160
3161 // set results
3162 (*entry_count_ptr) = num_entries;
3163 (*table_ptr) = jvmti_table;
3164
3165 return JVMTI_ERROR_NONE;
3166 } /* end GetLocalVariableTable */
3167
3168
3169 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3170 // bytecode_count_ptr - pre-checked for NULL
3171 // bytecodes_ptr - pre-checked for NULL
3172 jvmtiError
3173 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3174 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3175
3176 HandleMark hm;
3177 methodHandle method(Thread::current(), method_oop);
3178 jint size = (jint)method->code_size();
3179 jvmtiError err = allocate(size, bytecodes_ptr);
3180 if (err != JVMTI_ERROR_NONE) {
3181 return err;
3182 }
3183
3184 (*bytecode_count_ptr) = size;
3185 // get byte codes
3186 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3187
3188 return JVMTI_ERROR_NONE;
3189 } /* end GetBytecodes */
3190
3191
3192 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3193 // is_native_ptr - pre-checked for NULL
3194 jvmtiError
3195 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3196 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3197 (*is_native_ptr) = method_oop->is_native();
3198 return JVMTI_ERROR_NONE;
3199 } /* end IsMethodNative */
3200
3201
3202 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3203 // is_synthetic_ptr - pre-checked for NULL
3204 jvmtiError
3205 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3206 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3207 (*is_synthetic_ptr) = method_oop->is_synthetic();
3208 return JVMTI_ERROR_NONE;
3209 } /* end IsMethodSynthetic */
3210
3211
3212 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3213 // is_obsolete_ptr - pre-checked for NULL
3214 jvmtiError
3215 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3216 if (use_version_1_0_semantics() &&
3217 get_capabilities()->can_redefine_classes == 0) {
3218 // This JvmtiEnv requested version 1.0 semantics and this function
3219 // requires the can_redefine_classes capability in version 1.0 so
3220 // we need to return an error here.
3221 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3222 }
3223
3224 if (method_oop == NULL || method_oop->is_obsolete()) {
3225 *is_obsolete_ptr = true;
3226 } else {
3227 *is_obsolete_ptr = false;
3228 }
3229 return JVMTI_ERROR_NONE;
3230 } /* end IsMethodObsolete */
3231
3232 //
3233 // Raw Monitor functions
3234 //
3235
3236 // name - pre-checked for NULL
3237 // monitor_ptr - pre-checked for NULL
3238 jvmtiError
3239 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3240 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3241 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3242
3243 *monitor_ptr = (jrawMonitorID)rmonitor;
3244
3245 return JVMTI_ERROR_NONE;
3246 } /* end CreateRawMonitor */
3247
3248
3249 // rmonitor - pre-checked for validity
3250 jvmtiError
3251 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3252 if (Threads::number_of_threads() == 0) {
3253 // Remove this monitor from pending raw monitors list
3254 // if it has entered in onload or start phase.
3255 JvmtiPendingMonitors::destroy(rmonitor);
3256 } else {
3257 Thread* thread = Thread::current();
3258 if (rmonitor->owner() == thread) {
3259 // The caller owns this monitor which we are about to destroy.
3260 // We exit the underlying synchronization object so that the
3261 // "delete monitor" call below can work without an assertion
3262 // failure on systems that don't like destroying synchronization
3263 // objects that are locked.
3264 int r;
3265 int recursion = rmonitor->recursions();
3266 for (int i = 0; i <= recursion; i++) {
3267 r = rmonitor->raw_exit(thread);
3268 assert(r == JvmtiRawMonitor::M_OK, "raw_exit should have worked");
3269 if (r != JvmtiRawMonitor::M_OK) { // robustness
3270 return JVMTI_ERROR_INTERNAL;
3271 }
3272 }
3273 }
3274 if (rmonitor->owner() != NULL) {
3275 // The caller is trying to destroy a monitor that is locked by
3276 // someone else. While this is not forbidden by the JVMTI
3277 // spec, it will cause an assertion failure on systems that don't
3278 // like destroying synchronization objects that are locked.
3279 // We indicate a problem with the error return (and leak the
3280 // monitor's memory).
3281 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3282 }
3283 }
3284
3285 delete rmonitor;
3286
3287 return JVMTI_ERROR_NONE;
3288 } /* end DestroyRawMonitor */
3289
3290
3291 // rmonitor - pre-checked for validity
3292 jvmtiError
3293 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3294 if (Threads::number_of_threads() == 0) {
3295 // No JavaThreads exist so JvmtiRawMonitor enter cannot be
3296 // used, add this raw monitor to the pending list.
3297 // The pending monitors will be actually entered when
3298 // the VM is setup.
3299 // See transition_pending_raw_monitors in create_vm()
3300 // in thread.cpp.
3301 JvmtiPendingMonitors::enter(rmonitor);
3302 } else {
3303 Thread* thread = Thread::current();
3304 if (thread->is_Java_thread()) {
3305 JavaThread* current_thread = (JavaThread*)thread;
3306
3307 /* Transition to thread_blocked without entering vm state */
3308 /* This is really evil. Normally you can't undo _thread_blocked */
3309 /* transitions like this because it would cause us to miss a */
3310 /* safepoint but since the thread was already in _thread_in_native */
3311 /* the thread is not leaving a safepoint safe state and it will */
3312 /* block when it tries to return from native. We can't safepoint */
3313 /* block in here because we could deadlock the vmthread. Blech. */
3314
3315 JavaThreadState state = current_thread->thread_state();
3316 assert(state == _thread_in_native, "Must be _thread_in_native");
3317 // frame should already be walkable since we are in native
3318 assert(!current_thread->has_last_Java_frame() ||
3319 current_thread->frame_anchor()->walkable(), "Must be walkable");
3320 current_thread->set_thread_state(_thread_blocked);
3321
3322 rmonitor->raw_enter(current_thread);
3323 // restore state, still at a safepoint safe state
3324 current_thread->set_thread_state(state);
3325 } else {
3326 rmonitor->raw_enter(thread);
3327 }
3328 }
3329 return JVMTI_ERROR_NONE;
3330 } /* end RawMonitorEnter */
3331
3332
3333 // rmonitor - pre-checked for validity
3334 jvmtiError
3335 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3336 jvmtiError err = JVMTI_ERROR_NONE;
3337
3338 if (Threads::number_of_threads() == 0) {
3339 // No JavaThreads exist so just remove this monitor from the pending list.
3340 // Bool value from exit is false if rmonitor is not in the list.
3341 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3342 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3343 }
3344 } else {
3345 Thread* thread = Thread::current();
3346 int r = rmonitor->raw_exit(thread);
3347 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3348 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3349 }
3350 }
3351 return err;
3352 } /* end RawMonitorExit */
3353
3354
3355 // rmonitor - pre-checked for validity
3356 jvmtiError
3357 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3358 Thread* thread = Thread::current();
3359 int r = rmonitor->raw_wait(millis, thread);
3360
3361 switch (r) {
3362 case JvmtiRawMonitor::M_INTERRUPTED:
3363 return JVMTI_ERROR_INTERRUPT;
3364 case JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE:
3365 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3366 default:
3367 return JVMTI_ERROR_NONE;
3368 }
3369 } /* end RawMonitorWait */
3370
3371
3372 // rmonitor - pre-checked for validity
3373 jvmtiError
3374 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3375 Thread* thread = Thread::current();
3376 int r = rmonitor->raw_notify(thread);
3377
3378 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3379 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3380 }
3381 return JVMTI_ERROR_NONE;
3382 } /* end RawMonitorNotify */
3383
3384
3385 // rmonitor - pre-checked for validity
3386 jvmtiError
3387 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3388 Thread* thread = Thread::current();
3389 int r = rmonitor->raw_notifyAll(thread);
3390
3391 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3392 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3393 }
3394 return JVMTI_ERROR_NONE;
3395 } /* end RawMonitorNotifyAll */
3396
3397
3398 //
3399 // JNI Function Interception functions
3400 //
3401
3402
3403 // function_table - pre-checked for NULL
3404 jvmtiError
3405 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3406 // Copy jni function table at safepoint.
3407 VM_JNIFunctionTableCopier copier(function_table);
3408 VMThread::execute(&copier);
3409
3410 return JVMTI_ERROR_NONE;
3411 } /* end SetJNIFunctionTable */
3412
3413
3414 // function_table - pre-checked for NULL
3415 jvmtiError
3416 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3417 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3418 if (*function_table == NULL)
3419 return JVMTI_ERROR_OUT_OF_MEMORY;
3420 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3421 return JVMTI_ERROR_NONE;
3422 } /* end GetJNIFunctionTable */
3423
3424
3425 //
3426 // Event Management functions
3427 //
3428
3429 jvmtiError
3430 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3431 // can only generate two event types
3432 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3433 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3434 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3435 }
3436
3437 // for compiled_method_load events we must check that the environment
3438 // has the can_generate_compiled_method_load_events capability.
3439 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3440 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3441 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3442 }
3443 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3444 } else {
3445 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3446 }
3447
3448 } /* end GenerateEvents */
3449
3450
3451 //
3452 // Extension Mechanism functions
3453 //
3454
3455 // extension_count_ptr - pre-checked for NULL
3456 // extensions - pre-checked for NULL
3457 jvmtiError
3458 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3459 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3460 } /* end GetExtensionFunctions */
3461
3462
3463 // extension_count_ptr - pre-checked for NULL
3464 // extensions - pre-checked for NULL
3465 jvmtiError
3466 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3467 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3468 } /* end GetExtensionEvents */
3469
3470
3471 // callback - NULL is a valid value, must be checked
3472 jvmtiError
3473 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3474 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3475 } /* end SetExtensionEventCallback */
3476
3477 //
3478 // Timers functions
3479 //
3480
3481 // info_ptr - pre-checked for NULL
3482 jvmtiError
3483 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3484 os::current_thread_cpu_time_info(info_ptr);
3485 return JVMTI_ERROR_NONE;
3486 } /* end GetCurrentThreadCpuTimerInfo */
3487
3488
3489 // nanos_ptr - pre-checked for NULL
3490 jvmtiError
3491 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3492 *nanos_ptr = os::current_thread_cpu_time();
3493 return JVMTI_ERROR_NONE;
3494 } /* end GetCurrentThreadCpuTime */
3495
3496
3497 // info_ptr - pre-checked for NULL
3498 jvmtiError
3499 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3500 os::thread_cpu_time_info(info_ptr);
3501 return JVMTI_ERROR_NONE;
3502 } /* end GetThreadCpuTimerInfo */
3503
3504
3505 // Threads_lock NOT held, java_thread not protected by lock
3506 // java_thread - pre-checked
3507 // nanos_ptr - pre-checked for NULL
3508 jvmtiError
3509 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3510 *nanos_ptr = os::thread_cpu_time(java_thread);
3511 return JVMTI_ERROR_NONE;
3512 } /* end GetThreadCpuTime */
3513
3514
3515 // info_ptr - pre-checked for NULL
3516 jvmtiError
3517 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3518 os::javaTimeNanos_info(info_ptr);
3519 return JVMTI_ERROR_NONE;
3520 } /* end GetTimerInfo */
3521
3522
3523 // nanos_ptr - pre-checked for NULL
3524 jvmtiError
3525 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3526 *nanos_ptr = os::javaTimeNanos();
3527 return JVMTI_ERROR_NONE;
3528 } /* end GetTime */
3529
3530
3531 // processor_count_ptr - pre-checked for NULL
3532 jvmtiError
3533 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3534 *processor_count_ptr = os::active_processor_count();
3535 return JVMTI_ERROR_NONE;
3536 } /* end GetAvailableProcessors */
3537
3538 jvmtiError
3539 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3540 if (sampling_interval < 0) {
3541 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3542 }
3543 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3544 return JVMTI_ERROR_NONE;
3545 } /* end SetHeapSamplingInterval */
3546
3547 //
3548 // System Properties functions
3549 //
3550
3551 // count_ptr - pre-checked for NULL
3552 // property_ptr - pre-checked for NULL
3553 jvmtiError
3554 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3555 jvmtiError err = JVMTI_ERROR_NONE;
3556
3557 // Get the number of readable properties.
3558 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3559
3560 // Allocate memory to hold the exact number of readable properties.
3561 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3562 if (err != JVMTI_ERROR_NONE) {
3563 return err;
3564 }
3565 int readable_count = 0;
3566 // Loop through the system properties until all the readable properties are found.
3567 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3568 if (p->is_readable()) {
3569 const char *key = p->key();
3570 char **tmp_value = *property_ptr+readable_count;
3571 readable_count++;
3572 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3573 if (err == JVMTI_ERROR_NONE) {
3574 strcpy(*tmp_value, key);
3575 } else {
3576 // clean up previously allocated memory.
3577 for (int j = 0; j < readable_count; j++) {
3578 Deallocate((unsigned char*)*property_ptr+j);
3579 }
3580 Deallocate((unsigned char*)property_ptr);
3581 break;
3582 }
3583 }
3584 }
3585 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3586 return err;
3587 } /* end GetSystemProperties */
3588
3589
3590 // property - pre-checked for NULL
3591 // value_ptr - pre-checked for NULL
3592 jvmtiError
3593 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3594 jvmtiError err = JVMTI_ERROR_NONE;
3595 const char *value;
3596
3597 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3598 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3599 if (value == NULL) {
3600 err = JVMTI_ERROR_NOT_AVAILABLE;
3601 } else {
3602 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3603 if (err == JVMTI_ERROR_NONE) {
3604 strcpy(*value_ptr, value);
3605 }
3606 }
3607 return err;
3608 } /* end GetSystemProperty */
3609
3610
3611 // property - pre-checked for NULL
3612 // value - NULL is a valid value, must be checked
3613 jvmtiError
3614 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3615 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3616
3617 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3618 if (strcmp(property, p->key()) == 0) {
3619 if (p->set_writeable_value(value_ptr)) {
3620 err = JVMTI_ERROR_NONE;
3621 }
3622 }
3623 }
3624 return err;
3625 } /* end SetSystemProperty */