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, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1208
1209 // It is only safe to perform the direct operation on the current
1210 // thread. All other usage needs to use a vm-safepoint-op for safety.
1211 if (java_thread == calling_thread) {
1212 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1213 } else {
1214 // JVMTI get monitors info at safepoint. Do not require target thread to
1215 // be suspended.
1216 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1217 VMThread::execute(&op);
1218 err = op.result();
1219 }
1220 jint owned_monitor_count = owned_monitors_list->length();
1221 if (err == JVMTI_ERROR_NONE) {
1222 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1223 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1224 // copy into the returned array
1225 for (int i = 0; i < owned_monitor_count; i++) {
1226 (*owned_monitors_ptr)[i] =
1227 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1228 }
1229 *owned_monitor_count_ptr = owned_monitor_count;
1230 }
1231 }
1232 // clean up.
1233 for (int i = 0; i < owned_monitor_count; i++) {
1234 deallocate((unsigned char*)owned_monitors_list->at(i));
1235 }
1236 delete owned_monitors_list;
1237
1238 return err;
1239 } /* end GetOwnedMonitorInfo */
1240
1241
1242 // Threads_lock NOT held, java_thread not protected by lock
1243 // java_thread - pre-checked
1244 // monitor_info_count_ptr - pre-checked for NULL
1245 // monitor_info_ptr - pre-checked for NULL
1246 jvmtiError
1247 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1248 jvmtiError err = JVMTI_ERROR_NONE;
1249 JavaThread* calling_thread = JavaThread::current();
1250
1251 // growable array of jvmti monitors info on the C-heap
1252 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1253 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1254
1255 // It is only safe to perform the direct operation on the current
1256 // thread. All other usage needs to use a vm-safepoint-op for safety.
1257 if (java_thread == calling_thread) {
1258 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1259 } else {
1260 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1261 // be suspended.
1262 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1263 VMThread::execute(&op);
1264 err = op.result();
1265 }
1266
1267 jint owned_monitor_count = owned_monitors_list->length();
1268 if (err == JVMTI_ERROR_NONE) {
1269 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1270 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1271 // copy to output array.
1272 for (int i = 0; i < owned_monitor_count; i++) {
1273 (*monitor_info_ptr)[i].monitor =
1274 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1275 (*monitor_info_ptr)[i].stack_depth =
1276 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1277 }
1278 }
1279 *monitor_info_count_ptr = owned_monitor_count;
1280 }
1281
1282 // clean up.
1283 for (int i = 0; i < owned_monitor_count; i++) {
1284 deallocate((unsigned char*)owned_monitors_list->at(i));
1285 }
1286 delete owned_monitors_list;
1287
1288 return err;
1289 } /* end GetOwnedMonitorStackDepthInfo */
1290
1291
1292 // Threads_lock NOT held, java_thread not protected by lock
1293 // java_thread - pre-checked
1294 // monitor_ptr - pre-checked for NULL
1295 jvmtiError
1296 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1297 jvmtiError err = JVMTI_ERROR_NONE;
1298 JavaThread* calling_thread = JavaThread::current();
1299
1300 // It is only safe to perform the direct operation on the current
1301 // thread. All other usage needs to use a vm-safepoint-op for safety.
1302 if (java_thread == calling_thread) {
1303 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1304 } else {
1305 // get contended monitor information at safepoint.
1306 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1307 VMThread::execute(&op);
1308 err = op.result();
1309 }
1310 return err;
1311 } /* end GetCurrentContendedMonitor */
1312
1313
1314 // Threads_lock NOT held
1315 // thread - NOT pre-checked
1316 // proc - pre-checked for NULL
1317 // arg - NULL is a valid value, must be checked
1318 jvmtiError
1319 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1320 JavaThread* current_thread = JavaThread::current();
1321
1322 JavaThread* java_thread = NULL;
1323 oop thread_oop = NULL;
1324 ThreadsListHandle tlh(current_thread);
1325 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1326 if (err != JVMTI_ERROR_NONE) {
1327 // We got an error code so we don't have a JavaThread *, but
1328 // only return an error from here if we didn't get a valid
1329 // thread_oop.
1330 if (thread_oop == NULL) {
1331 return err;
1332 }
1333 // We have a valid thread_oop.
1334 }
1335
1336 if (java_thread != NULL) {
1337 // 'thread' refers to an existing JavaThread.
1338 return JVMTI_ERROR_INVALID_THREAD;
1339 }
1340
1341 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1342 return JVMTI_ERROR_INVALID_PRIORITY;
1343 }
1344
1345 Handle thread_hndl(current_thread, thread_oop);
1346 {
1347 MutexLocker mu(current_thread, Threads_lock); // grab Threads_lock
1348
1349 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1350
1351 // At this point it may be possible that no osthread was created for the
1352 // JavaThread due to lack of memory.
1353 if (new_thread == NULL || new_thread->osthread() == NULL) {
1354 if (new_thread != NULL) {
1355 new_thread->smr_delete();
1356 }
1357 return JVMTI_ERROR_OUT_OF_MEMORY;
1358 }
1359
1360 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1361 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1362 java_lang_Thread::set_daemon(thread_hndl());
1363
1364 new_thread->set_threadObj(thread_hndl());
1365 Threads::add(new_thread);
1366 Thread::start(new_thread);
1367 } // unlock Threads_lock
1368
1369 return JVMTI_ERROR_NONE;
1370 } /* end RunAgentThread */
1371
1372 //
1373 // Thread Group functions
1374 //
1375
1376 // group_count_ptr - pre-checked for NULL
1377 // groups_ptr - pre-checked for NULL
1378 jvmtiError
1379 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1380 JavaThread* current_thread = JavaThread::current();
1381
1382 // Only one top level thread group now.
1383 *group_count_ptr = 1;
1384
1385 // Allocate memory to store global-refs to the thread groups.
1386 // Assume this area is freed by caller.
1387 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1388
1389 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1390
1391 // Convert oop to Handle, then convert Handle to global-ref.
1392 {
1393 HandleMark hm(current_thread);
1394 Handle system_thread_group(current_thread, Universe::system_thread_group());
1395 *groups_ptr[0] = jni_reference(system_thread_group);
1396 }
1397
1398 return JVMTI_ERROR_NONE;
1399 } /* end GetTopThreadGroups */
1400
1401
1402 // info_ptr - pre-checked for NULL
1403 jvmtiError
1404 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1405 ResourceMark rm;
1406 HandleMark hm;
1407
1408 JavaThread* current_thread = JavaThread::current();
1409
1410 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1411 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1412
1413 const char* name;
1414 Handle parent_group;
1415 bool is_daemon;
1416 ThreadPriority max_priority;
1417
1418 name = java_lang_ThreadGroup::name(group_obj());
1419 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1420 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1421 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1422
1423 info_ptr->is_daemon = is_daemon;
1424 info_ptr->max_priority = max_priority;
1425 info_ptr->parent = jni_reference(parent_group);
1426
1427 if (name != NULL) {
1428 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1429 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1430 strcpy(info_ptr->name, name);
1431 } else {
1432 info_ptr->name = NULL;
1433 }
1434
1435 return JVMTI_ERROR_NONE;
1436 } /* end GetThreadGroupInfo */
1437
1438
1439 // thread_count_ptr - pre-checked for NULL
1440 // threads_ptr - pre-checked for NULL
1441 // group_count_ptr - pre-checked for NULL
1442 // groups_ptr - pre-checked for NULL
1443 jvmtiError
1444 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1445 JavaThread* current_thread = JavaThread::current();
1446 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1447 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1448
1449 Handle *thread_objs = NULL;
1450 Handle *group_objs = NULL;
1451 int nthreads = 0;
1452 int ngroups = 0;
1453 int hidden_threads = 0;
1454
1455 ResourceMark rm(current_thread);
1456 HandleMark hm(current_thread);
1457
1458 Handle group_hdl(current_thread, group_obj);
1459
1460 { // Cannot allow thread or group counts to change.
1461 ObjectLocker ol(group_hdl, current_thread);
1462
1463 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1464 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1465
1466 if (nthreads > 0) {
1467 ThreadsListHandle tlh(current_thread);
1468 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1469 assert(nthreads <= threads->length(), "too many threads");
1470 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1471 for (int i = 0, j = 0; i < nthreads; i++) {
1472 oop thread_obj = threads->obj_at(i);
1473 assert(thread_obj != NULL, "thread_obj is NULL");
1474 JavaThread *java_thread = NULL;
1475 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1476 if (err == JVMTI_ERROR_NONE) {
1477 // Have a valid JavaThread*.
1478 if (java_thread->is_hidden_from_external_view()) {
1479 // Filter out hidden java threads.
1480 hidden_threads++;
1481 continue;
1482 }
1483 } else {
1484 // We couldn't convert thread_obj into a JavaThread*.
1485 if (err == JVMTI_ERROR_INVALID_THREAD) {
1486 // The thread_obj does not refer to a java.lang.Thread object
1487 // so skip it.
1488 hidden_threads++;
1489 continue;
1490 }
1491 // We have a valid thread_obj, but no JavaThread*; the caller
1492 // can still have limited use for the thread_obj.
1493 }
1494 thread_objs[j++] = Handle(current_thread, thread_obj);
1495 }
1496 nthreads -= hidden_threads;
1497 } // ThreadsListHandle is destroyed here.
1498
1499 if (ngroups > 0) {
1500 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1501 assert(ngroups <= groups->length(), "too many groups");
1502 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1503 for (int i = 0; i < ngroups; i++) {
1504 oop group_obj = groups->obj_at(i);
1505 assert(group_obj != NULL, "group_obj != NULL");
1506 group_objs[i] = Handle(current_thread, group_obj);
1507 }
1508 }
1509 } // ThreadGroup unlocked here
1510
1511 *group_count_ptr = ngroups;
1512 *thread_count_ptr = nthreads;
1513 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1514 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1515 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1516 return JVMTI_ERROR_OUT_OF_MEMORY;
1517 }
1518 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1519 return JVMTI_ERROR_OUT_OF_MEMORY;
1520 }
1521
1522 return JVMTI_ERROR_NONE;
1523 } /* end GetThreadGroupChildren */
1524
1525
1526 //
1527 // Stack Frame functions
1528 //
1529
1530 // Threads_lock NOT held, java_thread not protected by lock
1531 // java_thread - pre-checked
1532 // max_frame_count - pre-checked to be greater than or equal to 0
1533 // frame_buffer - pre-checked for NULL
1534 // count_ptr - pre-checked for NULL
1535 jvmtiError
1536 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1537 jvmtiError err = JVMTI_ERROR_NONE;
1538
1539 // It is only safe to perform the direct operation on the current
1540 // thread. All other usage needs to use a vm-safepoint-op for safety.
1541 if (java_thread == JavaThread::current()) {
1542 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1543 } else {
1544 // JVMTI get stack trace at safepoint. Do not require target thread to
1545 // be suspended.
1546 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1547 VMThread::execute(&op);
1548 err = op.result();
1549 }
1550
1551 return err;
1552 } /* end GetStackTrace */
1553
1554
1555 // max_frame_count - pre-checked to be greater than or equal to 0
1556 // stack_info_ptr - pre-checked for NULL
1557 // thread_count_ptr - pre-checked for NULL
1558 jvmtiError
1559 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1560 jvmtiError err = JVMTI_ERROR_NONE;
1561 JavaThread* calling_thread = JavaThread::current();
1562
1563 // JVMTI get stack traces at safepoint.
1564 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1565 VMThread::execute(&op);
1566 *thread_count_ptr = op.final_thread_count();
1567 *stack_info_ptr = op.stack_info();
1568 err = op.result();
1569 return err;
1570 } /* end GetAllStackTraces */
1571
1572
1573 // thread_count - pre-checked to be greater than or equal to 0
1574 // thread_list - pre-checked for NULL
1575 // max_frame_count - pre-checked to be greater than or equal to 0
1576 // stack_info_ptr - pre-checked for NULL
1577 jvmtiError
1578 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1579 jvmtiError err = JVMTI_ERROR_NONE;
1580 // JVMTI get stack traces at safepoint.
1581 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1582 VMThread::execute(&op);
1583 err = op.result();
1584 if (err == JVMTI_ERROR_NONE) {
1585 *stack_info_ptr = op.stack_info();
1586 }
1587 return err;
1588 } /* end GetThreadListStackTraces */
1589
1590
1591 // Threads_lock NOT held, java_thread not protected by lock
1592 // java_thread - pre-checked
1593 // count_ptr - pre-checked for NULL
1594 jvmtiError
1595 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1596 jvmtiError err = JVMTI_ERROR_NONE;
1597
1598 // retrieve or create JvmtiThreadState.
1599 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1600 if (state == NULL) {
1601 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1602 }
1603
1604 // It is only safe to perform the direct operation on the current
1605 // thread. All other usage needs to use a vm-safepoint-op for safety.
1606 if (java_thread == JavaThread::current()) {
1607 err = get_frame_count(state, count_ptr);
1608 } else {
1609 // get java stack frame count at safepoint.
1610 VM_GetFrameCount op(this, state, count_ptr);
1611 VMThread::execute(&op);
1612 err = op.result();
1613 }
1614 return err;
1615 } /* end GetFrameCount */
1616
1617
1618 // Threads_lock NOT held, java_thread not protected by lock
1619 // java_thread - pre-checked
1620 jvmtiError
1621 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1622 JavaThread* current_thread = JavaThread::current();
1623 HandleMark hm(current_thread);
1624 uint32_t debug_bits = 0;
1625
1626 // retrieve or create the state
1627 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1628 if (state == NULL) {
1629 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1630 }
1631
1632 // Check if java_thread is fully suspended
1633 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1634 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1635 }
1636 // Check to see if a PopFrame was already in progress
1637 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1638 // Probably possible for JVMTI clients to trigger this, but the
1639 // JPDA backend shouldn't allow this to happen
1640 return JVMTI_ERROR_INTERNAL;
1641 }
1642
1643 {
1644 // Was workaround bug
1645 // 4812902: popFrame hangs if the method is waiting at a synchronize
1646 // Catch this condition and return an error to avoid hanging.
1647 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1648 OSThread* osThread = java_thread->osthread();
1649 if (osThread->get_state() == MONITOR_WAIT) {
1650 return JVMTI_ERROR_OPAQUE_FRAME;
1651 }
1652 }
1653
1654 {
1655 ResourceMark rm(current_thread);
1656 // Check if there are more than one Java frame in this thread, that the top two frames
1657 // are Java (not native) frames, and that there is no intervening VM frame
1658 int frame_count = 0;
1659 bool is_interpreted[2];
1660 intptr_t *frame_sp[2];
1661 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1662 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1663 methodHandle mh(current_thread, vfs.method());
1664 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1665 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1666 frame_sp[frame_count] = vfs.frame_id();
1667 if (++frame_count > 1) break;
1668 }
1669 if (frame_count < 2) {
1670 // We haven't found two adjacent non-native Java frames on the top.
1671 // There can be two situations here:
1672 // 1. There are no more java frames
1673 // 2. Two top java frames are separated by non-java native frames
1674 if(vframeFor(java_thread, 1) == NULL) {
1675 return JVMTI_ERROR_NO_MORE_FRAMES;
1676 } else {
1677 // Intervening non-java native or VM frames separate java frames.
1678 // Current implementation does not support this. See bug #5031735.
1679 // In theory it is possible to pop frames in such cases.
1680 return JVMTI_ERROR_OPAQUE_FRAME;
1681 }
1682 }
1683
1684 // If any of the top 2 frames is a compiled one, need to deoptimize it
1685 for (int i = 0; i < 2; i++) {
1686 if (!is_interpreted[i]) {
1687 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1688 }
1689 }
1690
1691 // Update the thread state to reflect that the top frame is popped
1692 // so that cur_stack_depth is maintained properly and all frameIDs
1693 // are invalidated.
1694 // The current frame will be popped later when the suspended thread
1695 // is resumed and right before returning from VM to Java.
1696 // (see call_VM_base() in assembler_<cpu>.cpp).
1697
1698 // It's fine to update the thread state here because no JVMTI events
1699 // shall be posted for this PopFrame.
1700
1701 // It is only safe to perform the direct operation on the current
1702 // thread. All other usage needs to use a vm-safepoint-op for safety.
1703 if (java_thread == JavaThread::current()) {
1704 state->update_for_pop_top_frame();
1705 } else {
1706 VM_UpdateForPopTopFrame op(state);
1707 VMThread::execute(&op);
1708 jvmtiError err = op.result();
1709 if (err != JVMTI_ERROR_NONE) {
1710 return err;
1711 }
1712 }
1713
1714 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1715 // Set pending step flag for this popframe and it is cleared when next
1716 // step event is posted.
1717 state->set_pending_step_for_popframe();
1718 }
1719
1720 return JVMTI_ERROR_NONE;
1721 } /* end PopFrame */
1722
1723
1724 // Threads_lock NOT held, java_thread not protected by lock
1725 // java_thread - pre-checked
1726 // java_thread - unchecked
1727 // depth - pre-checked as non-negative
1728 // method_ptr - pre-checked for NULL
1729 // location_ptr - pre-checked for NULL
1730 jvmtiError
1731 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1732 jvmtiError err = JVMTI_ERROR_NONE;
1733
1734 // It is only safe to perform the direct operation on the current
1735 // thread. All other usage needs to use a vm-safepoint-op for safety.
1736 if (java_thread == JavaThread::current()) {
1737 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1738 } else {
1739 // JVMTI get java stack frame location at safepoint.
1740 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1741 VMThread::execute(&op);
1742 err = op.result();
1743 }
1744 return err;
1745 } /* end GetFrameLocation */
1746
1747
1748 // Threads_lock NOT held, java_thread not protected by lock
1749 // java_thread - pre-checked
1750 // java_thread - unchecked
1751 // depth - pre-checked as non-negative
1752 jvmtiError
1753 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1754 jvmtiError err = JVMTI_ERROR_NONE;
1755 ResourceMark rm;
1756 uint32_t debug_bits = 0;
1757
1758 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1759 if (state == NULL) {
1760 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1761 }
1762
1763 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1764 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1765 }
1766
1767 if (TraceJVMTICalls) {
1768 JvmtiSuspendControl::print();
1769 }
1770
1771 vframe *vf = vframeFor(java_thread, depth);
1772 if (vf == NULL) {
1773 return JVMTI_ERROR_NO_MORE_FRAMES;
1774 }
1775
1776 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1777 return JVMTI_ERROR_OPAQUE_FRAME;
1778 }
1779
1780 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1781
1782 // It is only safe to perform the direct operation on the current
1783 // thread. All other usage needs to use a vm-safepoint-op for safety.
1784 if (java_thread == JavaThread::current()) {
1785 int frame_number = state->count_frames() - depth;
1786 state->env_thread_state(this)->set_frame_pop(frame_number);
1787 } else {
1788 VM_SetFramePop op(this, state, depth);
1789 VMThread::execute(&op);
1790 err = op.result();
1791 }
1792 return err;
1793 } /* end NotifyFramePop */
1794
1795
1796 //
1797 // Force Early Return functions
1798 //
1799
1800 // Threads_lock NOT held, java_thread not protected by lock
1801 // java_thread - pre-checked
1802 jvmtiError
1803 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1804 jvalue val;
1805 val.l = value;
1806 return force_early_return(java_thread, val, atos);
1807 } /* end ForceEarlyReturnObject */
1808
1809
1810 // Threads_lock NOT held, java_thread not protected by lock
1811 // java_thread - pre-checked
1812 jvmtiError
1813 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1814 jvalue val;
1815 val.i = value;
1816 return force_early_return(java_thread, val, itos);
1817 } /* end ForceEarlyReturnInt */
1818
1819
1820 // Threads_lock NOT held, java_thread not protected by lock
1821 // java_thread - pre-checked
1822 jvmtiError
1823 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1824 jvalue val;
1825 val.j = value;
1826 return force_early_return(java_thread, val, ltos);
1827 } /* end ForceEarlyReturnLong */
1828
1829
1830 // Threads_lock NOT held, java_thread not protected by lock
1831 // java_thread - pre-checked
1832 jvmtiError
1833 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1834 jvalue val;
1835 val.f = value;
1836 return force_early_return(java_thread, val, ftos);
1837 } /* end ForceEarlyReturnFloat */
1838
1839
1840 // Threads_lock NOT held, java_thread not protected by lock
1841 // java_thread - pre-checked
1842 jvmtiError
1843 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1844 jvalue val;
1845 val.d = value;
1846 return force_early_return(java_thread, val, dtos);
1847 } /* end ForceEarlyReturnDouble */
1848
1849
1850 // Threads_lock NOT held, java_thread not protected by lock
1851 // java_thread - pre-checked
1852 jvmtiError
1853 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1854 jvalue val;
1855 val.j = 0L;
1856 return force_early_return(java_thread, val, vtos);
1857 } /* end ForceEarlyReturnVoid */
1858
1859
1860 //
1861 // Heap functions
1862 //
1863
1864 // klass - NULL is a valid value, must be checked
1865 // initial_object - NULL is a valid value, must be checked
1866 // callbacks - pre-checked for NULL
1867 // user_data - NULL is a valid value, must be checked
1868 jvmtiError
1869 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1870 // check klass if provided
1871 Klass* k = NULL;
1872 if (klass != NULL) {
1873 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1874 if (k_mirror == NULL) {
1875 return JVMTI_ERROR_INVALID_CLASS;
1876 }
1877 if (java_lang_Class::is_primitive(k_mirror)) {
1878 return JVMTI_ERROR_NONE;
1879 }
1880 k = java_lang_Class::as_Klass(k_mirror);
1881 if (klass == NULL) {
1882 return JVMTI_ERROR_INVALID_CLASS;
1883 }
1884 }
1885
1886 if (initial_object != NULL) {
1887 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1888 if (init_obj == NULL) {
1889 return JVMTI_ERROR_INVALID_OBJECT;
1890 }
1891 }
1892
1893 Thread *thread = Thread::current();
1894 HandleMark hm(thread);
1895
1896 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1897 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1898 return JVMTI_ERROR_NONE;
1899 } /* end FollowReferences */
1900
1901
1902 // klass - NULL is a valid value, must be checked
1903 // callbacks - pre-checked for NULL
1904 // user_data - NULL is a valid value, must be checked
1905 jvmtiError
1906 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1907 // check klass if provided
1908 Klass* k = NULL;
1909 if (klass != NULL) {
1910 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1911 if (k_mirror == NULL) {
1912 return JVMTI_ERROR_INVALID_CLASS;
1913 }
1914 if (java_lang_Class::is_primitive(k_mirror)) {
1915 return JVMTI_ERROR_NONE;
1916 }
1917 k = java_lang_Class::as_Klass(k_mirror);
1918 if (k == NULL) {
1919 return JVMTI_ERROR_INVALID_CLASS;
1920 }
1921 }
1922
1923 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1924 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1925 return JVMTI_ERROR_NONE;
1926 } /* end IterateThroughHeap */
1927
1928
1929 // tag_ptr - pre-checked for NULL
1930 jvmtiError
1931 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1932 oop o = JNIHandles::resolve_external_guard(object);
1933 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1934 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1935 return JVMTI_ERROR_NONE;
1936 } /* end GetTag */
1937
1938
1939 jvmtiError
1940 JvmtiEnv::SetTag(jobject object, jlong tag) {
1941 oop o = JNIHandles::resolve_external_guard(object);
1942 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1943 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1944 return JVMTI_ERROR_NONE;
1945 } /* end SetTag */
1946
1947
1948 // tag_count - pre-checked to be greater than or equal to 0
1949 // tags - pre-checked for NULL
1950 // count_ptr - pre-checked for NULL
1951 // object_result_ptr - NULL is a valid value, must be checked
1952 // tag_result_ptr - NULL is a valid value, must be checked
1953 jvmtiError
1954 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1955 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1956 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1957 } /* end GetObjectsWithTags */
1958
1959
1960 jvmtiError
1961 JvmtiEnv::ForceGarbageCollection() {
1962 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1963 return JVMTI_ERROR_NONE;
1964 } /* end ForceGarbageCollection */
1965
1966
1967 //
1968 // Heap (1.0) functions
1969 //
1970
1971 // object_reference_callback - pre-checked for NULL
1972 // user_data - NULL is a valid value, must be checked
1973 jvmtiError
1974 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1975 oop o = JNIHandles::resolve_external_guard(object);
1976 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1977 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1978 return JVMTI_ERROR_NONE;
1979 } /* end IterateOverObjectsReachableFromObject */
1980
1981
1982 // heap_root_callback - NULL is a valid value, must be checked
1983 // stack_ref_callback - NULL is a valid value, must be checked
1984 // object_ref_callback - NULL is a valid value, must be checked
1985 // user_data - NULL is a valid value, must be checked
1986 jvmtiError
1987 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1988 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1989 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1990 return JVMTI_ERROR_NONE;
1991 } /* end IterateOverReachableObjects */
1992
1993
1994 // heap_object_callback - pre-checked for NULL
1995 // user_data - NULL is a valid value, must be checked
1996 jvmtiError
1997 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1998 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1999 Thread *thread = Thread::current();
2000 HandleMark hm(thread);
2001 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
2002 return JVMTI_ERROR_NONE;
2003 } /* end IterateOverHeap */
2004
2005
2006 // k_mirror - may be primitive, this must be checked
2007 // heap_object_callback - pre-checked for NULL
2008 // user_data - NULL is a valid value, must be checked
2009 jvmtiError
2010 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2011 if (java_lang_Class::is_primitive(k_mirror)) {
2012 // DO PRIMITIVE CLASS PROCESSING
2013 return JVMTI_ERROR_NONE;
2014 }
2015 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2016 if (klass == NULL) {
2017 return JVMTI_ERROR_INVALID_CLASS;
2018 }
2019 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2020 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2021 return JVMTI_ERROR_NONE;
2022 } /* end IterateOverInstancesOfClass */
2023
2024
2025 //
2026 // Local Variable functions
2027 //
2028
2029 // Threads_lock NOT held, java_thread not protected by lock
2030 // java_thread - pre-checked
2031 // java_thread - unchecked
2032 // depth - pre-checked as non-negative
2033 // value_ptr - pre-checked for NULL
2034 jvmtiError
2035 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2036 JavaThread* current_thread = JavaThread::current();
2037 // rm object is created to clean up the javaVFrame created in
2038 // doit_prologue(), but after doit() is finished with it.
2039 ResourceMark rm(current_thread);
2040
2041 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2042 VMThread::execute(&op);
2043 jvmtiError err = op.result();
2044 if (err != JVMTI_ERROR_NONE) {
2045 return err;
2046 } else {
2047 *value_ptr = op.value().l;
2048 return JVMTI_ERROR_NONE;
2049 }
2050 } /* end GetLocalObject */
2051
2052 // Threads_lock NOT held, java_thread not protected by lock
2053 // java_thread - pre-checked
2054 // java_thread - unchecked
2055 // depth - pre-checked as non-negative
2056 // value - pre-checked for NULL
2057 jvmtiError
2058 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2059 JavaThread* current_thread = JavaThread::current();
2060 // rm object is created to clean up the javaVFrame created in
2061 // doit_prologue(), but after doit() is finished with it.
2062 ResourceMark rm(current_thread);
2063
2064 VM_GetReceiver op(java_thread, current_thread, depth);
2065 VMThread::execute(&op);
2066 jvmtiError err = op.result();
2067 if (err != JVMTI_ERROR_NONE) {
2068 return err;
2069 } else {
2070 *value_ptr = op.value().l;
2071 return JVMTI_ERROR_NONE;
2072 }
2073 } /* end GetLocalInstance */
2074
2075
2076 // Threads_lock NOT held, java_thread not protected by lock
2077 // java_thread - pre-checked
2078 // java_thread - unchecked
2079 // depth - pre-checked as non-negative
2080 // value_ptr - pre-checked for NULL
2081 jvmtiError
2082 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2083 // rm object is created to clean up the javaVFrame created in
2084 // doit_prologue(), but after doit() is finished with it.
2085 ResourceMark rm;
2086
2087 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2088 VMThread::execute(&op);
2089 *value_ptr = op.value().i;
2090 return op.result();
2091 } /* end GetLocalInt */
2092
2093
2094 // Threads_lock NOT held, java_thread not protected by lock
2095 // java_thread - pre-checked
2096 // java_thread - unchecked
2097 // depth - pre-checked as non-negative
2098 // value_ptr - pre-checked for NULL
2099 jvmtiError
2100 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2101 // rm object is created to clean up the javaVFrame created in
2102 // doit_prologue(), but after doit() is finished with it.
2103 ResourceMark rm;
2104
2105 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2106 VMThread::execute(&op);
2107 *value_ptr = op.value().j;
2108 return op.result();
2109 } /* end GetLocalLong */
2110
2111
2112 // Threads_lock NOT held, java_thread not protected by lock
2113 // java_thread - pre-checked
2114 // java_thread - unchecked
2115 // depth - pre-checked as non-negative
2116 // value_ptr - pre-checked for NULL
2117 jvmtiError
2118 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2119 // rm object is created to clean up the javaVFrame created in
2120 // doit_prologue(), but after doit() is finished with it.
2121 ResourceMark rm;
2122
2123 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2124 VMThread::execute(&op);
2125 *value_ptr = op.value().f;
2126 return op.result();
2127 } /* end GetLocalFloat */
2128
2129
2130 // Threads_lock NOT held, java_thread not protected by lock
2131 // java_thread - pre-checked
2132 // java_thread - unchecked
2133 // depth - pre-checked as non-negative
2134 // value_ptr - pre-checked for NULL
2135 jvmtiError
2136 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2137 // rm object is created to clean up the javaVFrame created in
2138 // doit_prologue(), but after doit() is finished with it.
2139 ResourceMark rm;
2140
2141 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2142 VMThread::execute(&op);
2143 *value_ptr = op.value().d;
2144 return op.result();
2145 } /* end GetLocalDouble */
2146
2147
2148 // Threads_lock NOT held, java_thread not protected by lock
2149 // java_thread - pre-checked
2150 // java_thread - unchecked
2151 // depth - pre-checked as non-negative
2152 jvmtiError
2153 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2154 // rm object is created to clean up the javaVFrame created in
2155 // doit_prologue(), but after doit() is finished with it.
2156 ResourceMark rm;
2157 jvalue val;
2158 val.l = value;
2159 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2160 VMThread::execute(&op);
2161 return op.result();
2162 } /* end SetLocalObject */
2163
2164
2165 // Threads_lock NOT held, java_thread not protected by lock
2166 // java_thread - pre-checked
2167 // java_thread - unchecked
2168 // depth - pre-checked as non-negative
2169 jvmtiError
2170 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2171 // rm object is created to clean up the javaVFrame created in
2172 // doit_prologue(), but after doit() is finished with it.
2173 ResourceMark rm;
2174 jvalue val;
2175 val.i = value;
2176 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2177 VMThread::execute(&op);
2178 return op.result();
2179 } /* end SetLocalInt */
2180
2181
2182 // Threads_lock NOT held, java_thread not protected by lock
2183 // java_thread - pre-checked
2184 // java_thread - unchecked
2185 // depth - pre-checked as non-negative
2186 jvmtiError
2187 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2188 // rm object is created to clean up the javaVFrame created in
2189 // doit_prologue(), but after doit() is finished with it.
2190 ResourceMark rm;
2191 jvalue val;
2192 val.j = value;
2193 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2194 VMThread::execute(&op);
2195 return op.result();
2196 } /* end SetLocalLong */
2197
2198
2199 // Threads_lock NOT held, java_thread not protected by lock
2200 // java_thread - pre-checked
2201 // java_thread - unchecked
2202 // depth - pre-checked as non-negative
2203 jvmtiError
2204 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2205 // rm object is created to clean up the javaVFrame created in
2206 // doit_prologue(), but after doit() is finished with it.
2207 ResourceMark rm;
2208 jvalue val;
2209 val.f = value;
2210 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2211 VMThread::execute(&op);
2212 return op.result();
2213 } /* end SetLocalFloat */
2214
2215
2216 // Threads_lock NOT held, java_thread not protected by lock
2217 // java_thread - pre-checked
2218 // java_thread - unchecked
2219 // depth - pre-checked as non-negative
2220 jvmtiError
2221 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2222 // rm object is created to clean up the javaVFrame created in
2223 // doit_prologue(), but after doit() is finished with it.
2224 ResourceMark rm;
2225 jvalue val;
2226 val.d = value;
2227 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2228 VMThread::execute(&op);
2229 return op.result();
2230 } /* end SetLocalDouble */
2231
2232
2233 //
2234 // Breakpoint functions
2235 //
2236
2237 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2238 jvmtiError
2239 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2240 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2241 if (location < 0) { // simple invalid location check first
2242 return JVMTI_ERROR_INVALID_LOCATION;
2243 }
2244 // verify that the breakpoint is not past the end of the method
2245 if (location >= (jlocation) method_oop->code_size()) {
2246 return JVMTI_ERROR_INVALID_LOCATION;
2247 }
2248
2249 ResourceMark rm;
2250 JvmtiBreakpoint bp(method_oop, location);
2251 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2252 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2253 return JVMTI_ERROR_DUPLICATE;
2254
2255 if (TraceJVMTICalls) {
2256 jvmti_breakpoints.print();
2257 }
2258
2259 return JVMTI_ERROR_NONE;
2260 } /* end SetBreakpoint */
2261
2262
2263 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2264 jvmtiError
2265 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2266 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2267
2268 if (location < 0) { // simple invalid location check first
2269 return JVMTI_ERROR_INVALID_LOCATION;
2270 }
2271
2272 // verify that the breakpoint is not past the end of the method
2273 if (location >= (jlocation) method_oop->code_size()) {
2274 return JVMTI_ERROR_INVALID_LOCATION;
2275 }
2276
2277 JvmtiBreakpoint bp(method_oop, location);
2278
2279 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2280 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2281 return JVMTI_ERROR_NOT_FOUND;
2282
2283 if (TraceJVMTICalls) {
2284 jvmti_breakpoints.print();
2285 }
2286
2287 return JVMTI_ERROR_NONE;
2288 } /* end ClearBreakpoint */
2289
2290
2291 //
2292 // Watched Field functions
2293 //
2294
2295 jvmtiError
2296 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2297 // make sure we haven't set this watch before
2298 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2299 fdesc_ptr->set_is_field_access_watched(true);
2300
2301 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2302
2303 return JVMTI_ERROR_NONE;
2304 } /* end SetFieldAccessWatch */
2305
2306
2307 jvmtiError
2308 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2309 // make sure we have a watch to clear
2310 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2311 fdesc_ptr->set_is_field_access_watched(false);
2312
2313 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2314
2315 return JVMTI_ERROR_NONE;
2316 } /* end ClearFieldAccessWatch */
2317
2318
2319 jvmtiError
2320 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2321 // make sure we haven't set this watch before
2322 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2323 fdesc_ptr->set_is_field_modification_watched(true);
2324
2325 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2326
2327 return JVMTI_ERROR_NONE;
2328 } /* end SetFieldModificationWatch */
2329
2330
2331 jvmtiError
2332 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2333 // make sure we have a watch to clear
2334 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2335 fdesc_ptr->set_is_field_modification_watched(false);
2336
2337 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2338
2339 return JVMTI_ERROR_NONE;
2340 } /* end ClearFieldModificationWatch */
2341
2342 //
2343 // Class functions
2344 //
2345
2346
2347 // k_mirror - may be primitive, this must be checked
2348 // signature_ptr - NULL is a valid value, must be checked
2349 // generic_ptr - NULL is a valid value, must be checked
2350 jvmtiError
2351 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2352 ResourceMark rm;
2353 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2354 Klass* k = NULL;
2355 if (!isPrimitive) {
2356 k = java_lang_Class::as_Klass(k_mirror);
2357 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2358 }
2359 if (signature_ptr != NULL) {
2360 char* result = NULL;
2361 if (isPrimitive) {
2362 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2363 result = (char*) jvmtiMalloc(2);
2364 result[0] = tchar;
2365 result[1] = '\0';
2366 } else {
2367 const char* class_sig = k->signature_name();
2368 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2369 strcpy(result, class_sig);
2370 }
2371 *signature_ptr = result;
2372 }
2373 if (generic_ptr != NULL) {
2374 *generic_ptr = NULL;
2375 if (!isPrimitive && k->is_instance_klass()) {
2376 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2377 if (soo != NULL) {
2378 const char *gen_sig = soo->as_C_string();
2379 if (gen_sig != NULL) {
2380 char* gen_result;
2381 jvmtiError err = allocate(strlen(gen_sig) + 1,
2382 (unsigned char **)&gen_result);
2383 if (err != JVMTI_ERROR_NONE) {
2384 return err;
2385 }
2386 strcpy(gen_result, gen_sig);
2387 *generic_ptr = gen_result;
2388 }
2389 }
2390 }
2391 }
2392 return JVMTI_ERROR_NONE;
2393 } /* end GetClassSignature */
2394
2395
2396 // k_mirror - may be primitive, this must be checked
2397 // status_ptr - pre-checked for NULL
2398 jvmtiError
2399 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2400 jint result = 0;
2401 if (java_lang_Class::is_primitive(k_mirror)) {
2402 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2403 } else {
2404 Klass* k = java_lang_Class::as_Klass(k_mirror);
2405 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2406 result = k->jvmti_class_status();
2407 }
2408 *status_ptr = result;
2409
2410 return JVMTI_ERROR_NONE;
2411 } /* end GetClassStatus */
2412
2413
2414 // k_mirror - may be primitive, this must be checked
2415 // source_name_ptr - pre-checked for NULL
2416 jvmtiError
2417 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2418 if (java_lang_Class::is_primitive(k_mirror)) {
2419 return JVMTI_ERROR_ABSENT_INFORMATION;
2420 }
2421 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2422 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2423
2424 if (!k_klass->is_instance_klass()) {
2425 return JVMTI_ERROR_ABSENT_INFORMATION;
2426 }
2427
2428 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2429 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2430 {
2431 JavaThread* current_thread = JavaThread::current();
2432 ResourceMark rm(current_thread);
2433 const char* sfncp = (const char*) sfnOop->as_C_string();
2434 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2435 strcpy(*source_name_ptr, sfncp);
2436 }
2437
2438 return JVMTI_ERROR_NONE;
2439 } /* end GetSourceFileName */
2440
2441
2442 // k_mirror - may be primitive, this must be checked
2443 // modifiers_ptr - pre-checked for NULL
2444 jvmtiError
2445 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2446 JavaThread* current_thread = JavaThread::current();
2447 jint result = 0;
2448 if (!java_lang_Class::is_primitive(k_mirror)) {
2449 Klass* k = java_lang_Class::as_Klass(k_mirror);
2450 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2451 result = k->compute_modifier_flags(current_thread);
2452 JavaThread* THREAD = current_thread; // pass to macros
2453 if (HAS_PENDING_EXCEPTION) {
2454 CLEAR_PENDING_EXCEPTION;
2455 return JVMTI_ERROR_INTERNAL;
2456 };
2457
2458 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2459 if(k->is_super()) {
2460 result |= JVM_ACC_SUPER;
2461 }
2462 } else {
2463 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2464 }
2465 *modifiers_ptr = result;
2466
2467 return JVMTI_ERROR_NONE;
2468 } /* end GetClassModifiers */
2469
2470
2471 // k_mirror - may be primitive, this must be checked
2472 // method_count_ptr - pre-checked for NULL
2473 // methods_ptr - pre-checked for NULL
2474 jvmtiError
2475 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2476 JavaThread* current_thread = JavaThread::current();
2477 HandleMark hm(current_thread);
2478
2479 if (java_lang_Class::is_primitive(k_mirror)) {
2480 *method_count_ptr = 0;
2481 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2482 return JVMTI_ERROR_NONE;
2483 }
2484 Klass* k = java_lang_Class::as_Klass(k_mirror);
2485 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2486
2487 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2488 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2489 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2490 }
2491
2492 if (!k->is_instance_klass()) {
2493 *method_count_ptr = 0;
2494 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2495 return JVMTI_ERROR_NONE;
2496 }
2497 InstanceKlass* ik = InstanceKlass::cast(k);
2498 // Allocate the result and fill it in
2499 int result_length = ik->methods()->length();
2500 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2501 int index;
2502 bool jmethodids_found = true;
2503
2504 if (JvmtiExport::can_maintain_original_method_order()) {
2505 // Use the original method ordering indices stored in the class, so we can emit
2506 // jmethodIDs in the order they appeared in the class file
2507 for (index = 0; index < result_length; index++) {
2508 Method* m = ik->methods()->at(index);
2509 int original_index = ik->method_ordering()->at(index);
2510 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2511 jmethodID id;
2512 if (jmethodids_found) {
2513 id = m->find_jmethod_id_or_null();
2514 if (id == NULL) {
2515 // If we find an uninitialized value, make sure there is
2516 // enough space for all the uninitialized values we might
2517 // find.
2518 ik->ensure_space_for_methodids(index);
2519 jmethodids_found = false;
2520 id = m->jmethod_id();
2521 }
2522 } else {
2523 id = m->jmethod_id();
2524 }
2525 result_list[original_index] = id;
2526 }
2527 } else {
2528 // otherwise just copy in any order
2529 for (index = 0; index < result_length; index++) {
2530 Method* m = ik->methods()->at(index);
2531 jmethodID id;
2532 if (jmethodids_found) {
2533 id = m->find_jmethod_id_or_null();
2534 if (id == NULL) {
2535 // If we find an uninitialized value, make sure there is
2536 // enough space for all the uninitialized values we might
2537 // find.
2538 ik->ensure_space_for_methodids(index);
2539 jmethodids_found = false;
2540 id = m->jmethod_id();
2541 }
2542 } else {
2543 id = m->jmethod_id();
2544 }
2545 result_list[index] = id;
2546 }
2547 }
2548 // Fill in return value.
2549 *method_count_ptr = result_length;
2550 *methods_ptr = result_list;
2551
2552 return JVMTI_ERROR_NONE;
2553 } /* end GetClassMethods */
2554
2555
2556 // k_mirror - may be primitive, this must be checked
2557 // field_count_ptr - pre-checked for NULL
2558 // fields_ptr - pre-checked for NULL
2559 jvmtiError
2560 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2561 if (java_lang_Class::is_primitive(k_mirror)) {
2562 *field_count_ptr = 0;
2563 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2564 return JVMTI_ERROR_NONE;
2565 }
2566 JavaThread* current_thread = JavaThread::current();
2567 HandleMark hm(current_thread);
2568 Klass* k = java_lang_Class::as_Klass(k_mirror);
2569 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2570
2571 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2572 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2573 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2574 }
2575
2576 if (!k->is_instance_klass()) {
2577 *field_count_ptr = 0;
2578 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2579 return JVMTI_ERROR_NONE;
2580 }
2581
2582
2583 InstanceKlass* ik = InstanceKlass::cast(k);
2584
2585 int result_count = 0;
2586 // First, count the fields.
2587 FilteredFieldStream flds(ik, true, true);
2588 result_count = flds.field_count();
2589
2590 // Allocate the result and fill it in
2591 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2592 // The JVMTI spec requires fields in the order they occur in the class file,
2593 // this is the reverse order of what FieldStream hands out.
2594 int id_index = (result_count - 1);
2595
2596 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2597 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2598 ik, src_st.offset(),
2599 src_st.access_flags().is_static());
2600 }
2601 assert(id_index == -1, "just checking");
2602 // Fill in the results
2603 *field_count_ptr = result_count;
2604 *fields_ptr = result_list;
2605
2606 return JVMTI_ERROR_NONE;
2607 } /* end GetClassFields */
2608
2609
2610 // k_mirror - may be primitive, this must be checked
2611 // interface_count_ptr - pre-checked for NULL
2612 // interfaces_ptr - pre-checked for NULL
2613 jvmtiError
2614 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2615 {
2616 if (java_lang_Class::is_primitive(k_mirror)) {
2617 *interface_count_ptr = 0;
2618 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2619 return JVMTI_ERROR_NONE;
2620 }
2621 JavaThread* current_thread = JavaThread::current();
2622 HandleMark hm(current_thread);
2623 Klass* k = java_lang_Class::as_Klass(k_mirror);
2624 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2625
2626 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2627 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2628 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2629
2630 if (!k->is_instance_klass()) {
2631 *interface_count_ptr = 0;
2632 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2633 return JVMTI_ERROR_NONE;
2634 }
2635
2636 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2637 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2638 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2639 for (int i_index = 0; i_index < result_length; i_index += 1) {
2640 InstanceKlass* klass_at = interface_list->at(i_index);
2641 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2642 assert(klass_at->is_interface(), "interfaces must be interfaces");
2643 oop mirror_at = klass_at->java_mirror();
2644 Handle handle_at = Handle(current_thread, mirror_at);
2645 result_list[i_index] = (jclass) jni_reference(handle_at);
2646 }
2647 *interface_count_ptr = result_length;
2648 *interfaces_ptr = result_list;
2649 }
2650
2651 return JVMTI_ERROR_NONE;
2652 } /* end GetImplementedInterfaces */
2653
2654
2655 // k_mirror - may be primitive, this must be checked
2656 // minor_version_ptr - pre-checked for NULL
2657 // major_version_ptr - pre-checked for NULL
2658 jvmtiError
2659 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2660 if (java_lang_Class::is_primitive(k_mirror)) {
2661 return JVMTI_ERROR_ABSENT_INFORMATION;
2662 }
2663 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2664
2665 jint status = klass->jvmti_class_status();
2666 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2667 return JVMTI_ERROR_INVALID_CLASS;
2668 }
2669 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2670 return JVMTI_ERROR_ABSENT_INFORMATION;
2671 }
2672
2673 InstanceKlass* ik = InstanceKlass::cast(klass);
2674 *minor_version_ptr = ik->minor_version();
2675 *major_version_ptr = ik->major_version();
2676
2677 return JVMTI_ERROR_NONE;
2678 } /* end GetClassVersionNumbers */
2679
2680
2681 // k_mirror - may be primitive, this must be checked
2682 // constant_pool_count_ptr - pre-checked for NULL
2683 // constant_pool_byte_count_ptr - pre-checked for NULL
2684 // constant_pool_bytes_ptr - pre-checked for NULL
2685 jvmtiError
2686 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2687 if (java_lang_Class::is_primitive(k_mirror)) {
2688 return JVMTI_ERROR_ABSENT_INFORMATION;
2689 }
2690
2691 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2692 Thread *thread = Thread::current();
2693 ResourceMark rm(thread);
2694
2695 jint status = klass->jvmti_class_status();
2696 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2697 return JVMTI_ERROR_INVALID_CLASS;
2698 }
2699 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2700 return JVMTI_ERROR_ABSENT_INFORMATION;
2701 }
2702
2703 InstanceKlass* ik = InstanceKlass::cast(klass);
2704 JvmtiConstantPoolReconstituter reconstituter(ik);
2705 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2706 return reconstituter.get_error();
2707 }
2708
2709 unsigned char *cpool_bytes;
2710 int cpool_size = reconstituter.cpool_size();
2711 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2712 return reconstituter.get_error();
2713 }
2714 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2715 if (res != JVMTI_ERROR_NONE) {
2716 return res;
2717 }
2718 reconstituter.copy_cpool_bytes(cpool_bytes);
2719 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2720 return reconstituter.get_error();
2721 }
2722
2723 constantPoolHandle constants(thread, ik->constants());
2724 *constant_pool_count_ptr = constants->length();
2725 *constant_pool_byte_count_ptr = cpool_size;
2726 *constant_pool_bytes_ptr = cpool_bytes;
2727
2728 return JVMTI_ERROR_NONE;
2729 } /* end GetConstantPool */
2730
2731
2732 // k_mirror - may be primitive, this must be checked
2733 // is_interface_ptr - pre-checked for NULL
2734 jvmtiError
2735 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2736 {
2737 bool result = false;
2738 if (!java_lang_Class::is_primitive(k_mirror)) {
2739 Klass* k = java_lang_Class::as_Klass(k_mirror);
2740 if (k != NULL && k->is_interface()) {
2741 result = true;
2742 }
2743 }
2744 *is_interface_ptr = result;
2745 }
2746
2747 return JVMTI_ERROR_NONE;
2748 } /* end IsInterface */
2749
2750
2751 // k_mirror - may be primitive, this must be checked
2752 // is_array_class_ptr - pre-checked for NULL
2753 jvmtiError
2754 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2755 {
2756 bool result = false;
2757 if (!java_lang_Class::is_primitive(k_mirror)) {
2758 Klass* k = java_lang_Class::as_Klass(k_mirror);
2759 if (k != NULL && k->is_array_klass()) {
2760 result = true;
2761 }
2762 }
2763 *is_array_class_ptr = result;
2764 }
2765
2766 return JVMTI_ERROR_NONE;
2767 } /* end IsArrayClass */
2768
2769
2770 // k_mirror - may be primitive, this must be checked
2771 // classloader_ptr - pre-checked for NULL
2772 jvmtiError
2773 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2774 {
2775 if (java_lang_Class::is_primitive(k_mirror)) {
2776 *classloader_ptr = (jclass) jni_reference(Handle());
2777 return JVMTI_ERROR_NONE;
2778 }
2779 JavaThread* current_thread = JavaThread::current();
2780 HandleMark hm(current_thread);
2781 Klass* k = java_lang_Class::as_Klass(k_mirror);
2782 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2783
2784 oop result_oop = k->class_loader();
2785 if (result_oop == NULL) {
2786 *classloader_ptr = (jclass) jni_reference(Handle());
2787 return JVMTI_ERROR_NONE;
2788 }
2789 Handle result_handle = Handle(current_thread, result_oop);
2790 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2791 *classloader_ptr = result_jnihandle;
2792 }
2793 return JVMTI_ERROR_NONE;
2794 } /* end GetClassLoader */
2795
2796
2797 // k_mirror - may be primitive, this must be checked
2798 // source_debug_extension_ptr - pre-checked for NULL
2799 jvmtiError
2800 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2801 {
2802 if (java_lang_Class::is_primitive(k_mirror)) {
2803 return JVMTI_ERROR_ABSENT_INFORMATION;
2804 }
2805 Klass* k = java_lang_Class::as_Klass(k_mirror);
2806 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2807 if (!k->is_instance_klass()) {
2808 return JVMTI_ERROR_ABSENT_INFORMATION;
2809 }
2810 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2811 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2812
2813 {
2814 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2815 strcpy(*source_debug_extension_ptr, sde);
2816 }
2817 }
2818
2819 return JVMTI_ERROR_NONE;
2820 } /* end GetSourceDebugExtension */
2821
2822 //
2823 // Object functions
2824 //
2825
2826 // hash_code_ptr - pre-checked for NULL
2827 jvmtiError
2828 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2829 oop mirror = JNIHandles::resolve_external_guard(object);
2830 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2831 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2832
2833 {
2834 jint result = (jint) mirror->identity_hash();
2835 *hash_code_ptr = result;
2836 }
2837 return JVMTI_ERROR_NONE;
2838 } /* end GetObjectHashCode */
2839
2840
2841 // info_ptr - pre-checked for NULL
2842 jvmtiError
2843 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2844 JavaThread* calling_thread = JavaThread::current();
2845 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2846 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2847 // Some of the critical threads were not suspended. go to a safepoint and try again
2848 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2849 VMThread::execute(&op);
2850 err = op.result();
2851 }
2852 return err;
2853 } /* end GetObjectMonitorUsage */
2854
2855
2856 //
2857 // Field functions
2858 //
2859
2860 // name_ptr - NULL is a valid value, must be checked
2861 // signature_ptr - NULL is a valid value, must be checked
2862 // generic_ptr - NULL is a valid value, must be checked
2863 jvmtiError
2864 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2865 JavaThread* current_thread = JavaThread::current();
2866 ResourceMark rm(current_thread);
2867 if (name_ptr == NULL) {
2868 // just don't return the name
2869 } else {
2870 const char* fieldName = fdesc_ptr->name()->as_C_string();
2871 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2872 if (*name_ptr == NULL)
2873 return JVMTI_ERROR_OUT_OF_MEMORY;
2874 strcpy(*name_ptr, fieldName);
2875 }
2876 if (signature_ptr== NULL) {
2877 // just don't return the signature
2878 } else {
2879 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2880 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2881 if (*signature_ptr == NULL)
2882 return JVMTI_ERROR_OUT_OF_MEMORY;
2883 strcpy(*signature_ptr, fieldSignature);
2884 }
2885 if (generic_ptr != NULL) {
2886 *generic_ptr = NULL;
2887 Symbol* soop = fdesc_ptr->generic_signature();
2888 if (soop != NULL) {
2889 const char* gen_sig = soop->as_C_string();
2890 if (gen_sig != NULL) {
2891 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2892 if (err != JVMTI_ERROR_NONE) {
2893 return err;
2894 }
2895 strcpy(*generic_ptr, gen_sig);
2896 }
2897 }
2898 }
2899 return JVMTI_ERROR_NONE;
2900 } /* end GetFieldName */
2901
2902
2903 // declaring_class_ptr - pre-checked for NULL
2904 jvmtiError
2905 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2906
2907 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2908 return JVMTI_ERROR_NONE;
2909 } /* end GetFieldDeclaringClass */
2910
2911
2912 // modifiers_ptr - pre-checked for NULL
2913 jvmtiError
2914 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2915
2916 AccessFlags resultFlags = fdesc_ptr->access_flags();
2917 jint result = resultFlags.as_int();
2918 *modifiers_ptr = result;
2919
2920 return JVMTI_ERROR_NONE;
2921 } /* end GetFieldModifiers */
2922
2923
2924 // is_synthetic_ptr - pre-checked for NULL
2925 jvmtiError
2926 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2927 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2928 return JVMTI_ERROR_NONE;
2929 } /* end IsFieldSynthetic */
2930
2931
2932 //
2933 // Method functions
2934 //
2935
2936 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2937 // name_ptr - NULL is a valid value, must be checked
2938 // signature_ptr - NULL is a valid value, must be checked
2939 // generic_ptr - NULL is a valid value, must be checked
2940 jvmtiError
2941 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2942 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2943 JavaThread* current_thread = JavaThread::current();
2944
2945 ResourceMark rm(current_thread); // get the utf8 name and signature
2946 if (name_ptr == NULL) {
2947 // just don't return the name
2948 } else {
2949 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2950 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2951 strcpy(*name_ptr, utf8_name);
2952 }
2953 if (signature_ptr == NULL) {
2954 // just don't return the signature
2955 } else {
2956 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2957 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2958 strcpy(*signature_ptr, utf8_signature);
2959 }
2960
2961 if (generic_ptr != NULL) {
2962 *generic_ptr = NULL;
2963 Symbol* soop = method_oop->generic_signature();
2964 if (soop != NULL) {
2965 const char* gen_sig = soop->as_C_string();
2966 if (gen_sig != NULL) {
2967 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2968 if (err != JVMTI_ERROR_NONE) {
2969 return err;
2970 }
2971 strcpy(*generic_ptr, gen_sig);
2972 }
2973 }
2974 }
2975 return JVMTI_ERROR_NONE;
2976 } /* end GetMethodName */
2977
2978
2979 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2980 // declaring_class_ptr - pre-checked for NULL
2981 jvmtiError
2982 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2983 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2984 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2985 return JVMTI_ERROR_NONE;
2986 } /* end GetMethodDeclaringClass */
2987
2988
2989 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2990 // modifiers_ptr - pre-checked for NULL
2991 jvmtiError
2992 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2993 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2994 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2995 return JVMTI_ERROR_NONE;
2996 } /* end GetMethodModifiers */
2997
2998
2999 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3000 // max_ptr - pre-checked for NULL
3001 jvmtiError
3002 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
3003 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3004 // get max stack
3005 (*max_ptr) = method_oop->max_locals();
3006 return JVMTI_ERROR_NONE;
3007 } /* end GetMaxLocals */
3008
3009
3010 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3011 // size_ptr - pre-checked for NULL
3012 jvmtiError
3013 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3014 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3015 // get size of arguments
3016
3017 (*size_ptr) = method_oop->size_of_parameters();
3018 return JVMTI_ERROR_NONE;
3019 } /* end GetArgumentsSize */
3020
3021
3022 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3023 // entry_count_ptr - pre-checked for NULL
3024 // table_ptr - pre-checked for NULL
3025 jvmtiError
3026 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3027 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3028 if (!method_oop->has_linenumber_table()) {
3029 return (JVMTI_ERROR_ABSENT_INFORMATION);
3030 }
3031
3032 // The line number table is compressed so we don't know how big it is until decompressed.
3033 // Decompression is really fast so we just do it twice.
3034
3035 // Compute size of table
3036 jint num_entries = 0;
3037 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3038 while (stream.read_pair()) {
3039 num_entries++;
3040 }
3041 jvmtiLineNumberEntry *jvmti_table =
3042 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3043
3044 // Fill jvmti table
3045 if (num_entries > 0) {
3046 int index = 0;
3047 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3048 while (stream.read_pair()) {
3049 jvmti_table[index].start_location = (jlocation) stream.bci();
3050 jvmti_table[index].line_number = (jint) stream.line();
3051 index++;
3052 }
3053 assert(index == num_entries, "sanity check");
3054 }
3055
3056 // Set up results
3057 (*entry_count_ptr) = num_entries;
3058 (*table_ptr) = jvmti_table;
3059
3060 return JVMTI_ERROR_NONE;
3061 } /* end GetLineNumberTable */
3062
3063
3064 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3065 // start_location_ptr - pre-checked for NULL
3066 // end_location_ptr - pre-checked for NULL
3067 jvmtiError
3068 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3069
3070 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3071 // get start and end location
3072 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3073 if (method_oop->code_size() == 0) {
3074 // there is no code so there is no start location
3075 (*start_location_ptr) = (jlocation)(-1);
3076 } else {
3077 (*start_location_ptr) = (jlocation)(0);
3078 }
3079
3080 return JVMTI_ERROR_NONE;
3081 } /* end GetMethodLocation */
3082
3083
3084 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3085 // entry_count_ptr - pre-checked for NULL
3086 // table_ptr - pre-checked for NULL
3087 jvmtiError
3088 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3089
3090 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3091 JavaThread* current_thread = JavaThread::current();
3092
3093 // does the klass have any local variable information?
3094 InstanceKlass* ik = method_oop->method_holder();
3095 if (!ik->access_flags().has_localvariable_table()) {
3096 return (JVMTI_ERROR_ABSENT_INFORMATION);
3097 }
3098
3099 ConstantPool* constants = method_oop->constants();
3100 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3101
3102 // in the vm localvariable table representation, 6 consecutive elements in the table
3103 // represent a 6-tuple of shorts
3104 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3105 jint num_entries = method_oop->localvariable_table_length();
3106 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3107 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3108
3109 if (num_entries > 0) {
3110 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3111 for (int i = 0; i < num_entries; i++) {
3112 // get the 5 tuple information from the vm table
3113 jlocation start_location = (jlocation) table[i].start_bci;
3114 jint length = (jint) table[i].length;
3115 int name_index = (int) table[i].name_cp_index;
3116 int signature_index = (int) table[i].descriptor_cp_index;
3117 int generic_signature_index = (int) table[i].signature_cp_index;
3118 jint slot = (jint) table[i].slot;
3119
3120 // get utf8 name and signature
3121 char *name_buf = NULL;
3122 char *sig_buf = NULL;
3123 char *gen_sig_buf = NULL;
3124 {
3125 ResourceMark rm(current_thread);
3126
3127 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3128 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3129 strcpy(name_buf, utf8_name);
3130
3131 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3132 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3133 strcpy(sig_buf, utf8_signature);
3134
3135 if (generic_signature_index > 0) {
3136 const char *utf8_gen_sign = (const char *)
3137 constants->symbol_at(generic_signature_index)->as_utf8();
3138 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3139 strcpy(gen_sig_buf, utf8_gen_sign);
3140 }
3141 }
3142
3143 // fill in the jvmti local variable table
3144 jvmti_table[i].start_location = start_location;
3145 jvmti_table[i].length = length;
3146 jvmti_table[i].name = name_buf;
3147 jvmti_table[i].signature = sig_buf;
3148 jvmti_table[i].generic_signature = gen_sig_buf;
3149 jvmti_table[i].slot = slot;
3150 }
3151 }
3152
3153 // set results
3154 (*entry_count_ptr) = num_entries;
3155 (*table_ptr) = jvmti_table;
3156
3157 return JVMTI_ERROR_NONE;
3158 } /* end GetLocalVariableTable */
3159
3160
3161 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3162 // bytecode_count_ptr - pre-checked for NULL
3163 // bytecodes_ptr - pre-checked for NULL
3164 jvmtiError
3165 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3166 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3167
3168 HandleMark hm;
3169 methodHandle method(Thread::current(), method_oop);
3170 jint size = (jint)method->code_size();
3171 jvmtiError err = allocate(size, bytecodes_ptr);
3172 if (err != JVMTI_ERROR_NONE) {
3173 return err;
3174 }
3175
3176 (*bytecode_count_ptr) = size;
3177 // get byte codes
3178 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3179
3180 return JVMTI_ERROR_NONE;
3181 } /* end GetBytecodes */
3182
3183
3184 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3185 // is_native_ptr - pre-checked for NULL
3186 jvmtiError
3187 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3188 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3189 (*is_native_ptr) = method_oop->is_native();
3190 return JVMTI_ERROR_NONE;
3191 } /* end IsMethodNative */
3192
3193
3194 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3195 // is_synthetic_ptr - pre-checked for NULL
3196 jvmtiError
3197 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3198 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3199 (*is_synthetic_ptr) = method_oop->is_synthetic();
3200 return JVMTI_ERROR_NONE;
3201 } /* end IsMethodSynthetic */
3202
3203
3204 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3205 // is_obsolete_ptr - pre-checked for NULL
3206 jvmtiError
3207 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3208 if (use_version_1_0_semantics() &&
3209 get_capabilities()->can_redefine_classes == 0) {
3210 // This JvmtiEnv requested version 1.0 semantics and this function
3211 // requires the can_redefine_classes capability in version 1.0 so
3212 // we need to return an error here.
3213 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3214 }
3215
3216 if (method_oop == NULL || method_oop->is_obsolete()) {
3217 *is_obsolete_ptr = true;
3218 } else {
3219 *is_obsolete_ptr = false;
3220 }
3221 return JVMTI_ERROR_NONE;
3222 } /* end IsMethodObsolete */
3223
3224 //
3225 // Raw Monitor functions
3226 //
3227
3228 // name - pre-checked for NULL
3229 // monitor_ptr - pre-checked for NULL
3230 jvmtiError
3231 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3232 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3233 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3234
3235 *monitor_ptr = (jrawMonitorID)rmonitor;
3236
3237 return JVMTI_ERROR_NONE;
3238 } /* end CreateRawMonitor */
3239
3240
3241 // rmonitor - pre-checked for validity
3242 jvmtiError
3243 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3244 if (Threads::number_of_threads() == 0) {
3245 // Remove this monitor from pending raw monitors list
3246 // if it has entered in onload or start phase.
3247 JvmtiPendingMonitors::destroy(rmonitor);
3248 } else {
3249 Thread* thread = Thread::current();
3250 if (rmonitor->owner() == thread) {
3251 // The caller owns this monitor which we are about to destroy.
3252 // We exit the underlying synchronization object so that the
3253 // "delete monitor" call below can work without an assertion
3254 // failure on systems that don't like destroying synchronization
3255 // objects that are locked.
3256 int r;
3257 int recursion = rmonitor->recursions();
3258 for (int i = 0; i <= recursion; i++) {
3259 r = rmonitor->raw_exit(thread);
3260 assert(r == JvmtiRawMonitor::M_OK, "raw_exit should have worked");
3261 if (r != JvmtiRawMonitor::M_OK) { // robustness
3262 return JVMTI_ERROR_INTERNAL;
3263 }
3264 }
3265 }
3266 if (rmonitor->owner() != NULL) {
3267 // The caller is trying to destroy a monitor that is locked by
3268 // someone else. While this is not forbidden by the JVMTI
3269 // spec, it will cause an assertion failure on systems that don't
3270 // like destroying synchronization objects that are locked.
3271 // We indicate a problem with the error return (and leak the
3272 // monitor's memory).
3273 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3274 }
3275 }
3276
3277 delete rmonitor;
3278
3279 return JVMTI_ERROR_NONE;
3280 } /* end DestroyRawMonitor */
3281
3282
3283 // rmonitor - pre-checked for validity
3284 jvmtiError
3285 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3286 if (Threads::number_of_threads() == 0) {
3287 // No JavaThreads exist so JvmtiRawMonitor enter cannot be
3288 // used, add this raw monitor to the pending list.
3289 // The pending monitors will be actually entered when
3290 // the VM is setup.
3291 // See transition_pending_raw_monitors in create_vm()
3292 // in thread.cpp.
3293 JvmtiPendingMonitors::enter(rmonitor);
3294 } else {
3295 Thread* thread = Thread::current();
3296 if (thread->is_Java_thread()) {
3297 JavaThread* current_thread = (JavaThread*)thread;
3298
3299 /* Transition to thread_blocked without entering vm state */
3300 /* This is really evil. Normally you can't undo _thread_blocked */
3301 /* transitions like this because it would cause us to miss a */
3302 /* safepoint but since the thread was already in _thread_in_native */
3303 /* the thread is not leaving a safepoint safe state and it will */
3304 /* block when it tries to return from native. We can't safepoint */
3305 /* block in here because we could deadlock the vmthread. Blech. */
3306
3307 JavaThreadState state = current_thread->thread_state();
3308 assert(state == _thread_in_native, "Must be _thread_in_native");
3309 // frame should already be walkable since we are in native
3310 assert(!current_thread->has_last_Java_frame() ||
3311 current_thread->frame_anchor()->walkable(), "Must be walkable");
3312 current_thread->set_thread_state(_thread_blocked);
3313
3314 rmonitor->raw_enter(current_thread);
3315 // restore state, still at a safepoint safe state
3316 current_thread->set_thread_state(state);
3317 } else {
3318 rmonitor->raw_enter(thread);
3319 }
3320 }
3321 return JVMTI_ERROR_NONE;
3322 } /* end RawMonitorEnter */
3323
3324
3325 // rmonitor - pre-checked for validity
3326 jvmtiError
3327 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3328 jvmtiError err = JVMTI_ERROR_NONE;
3329
3330 if (Threads::number_of_threads() == 0) {
3331 // No JavaThreads exist so just remove this monitor from the pending list.
3332 // Bool value from exit is false if rmonitor is not in the list.
3333 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3334 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3335 }
3336 } else {
3337 Thread* thread = Thread::current();
3338 int r = rmonitor->raw_exit(thread);
3339 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3340 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3341 }
3342 }
3343 return err;
3344 } /* end RawMonitorExit */
3345
3346
3347 // rmonitor - pre-checked for validity
3348 jvmtiError
3349 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3350 Thread* thread = Thread::current();
3351 int r = rmonitor->raw_wait(millis, thread);
3352
3353 switch (r) {
3354 case JvmtiRawMonitor::M_INTERRUPTED:
3355 return JVMTI_ERROR_INTERRUPT;
3356 case JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE:
3357 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3358 default:
3359 return JVMTI_ERROR_NONE;
3360 }
3361 } /* end RawMonitorWait */
3362
3363
3364 // rmonitor - pre-checked for validity
3365 jvmtiError
3366 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3367 Thread* thread = Thread::current();
3368 int r = rmonitor->raw_notify(thread);
3369
3370 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3371 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3372 }
3373 return JVMTI_ERROR_NONE;
3374 } /* end RawMonitorNotify */
3375
3376
3377 // rmonitor - pre-checked for validity
3378 jvmtiError
3379 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3380 Thread* thread = Thread::current();
3381 int r = rmonitor->raw_notifyAll(thread);
3382
3383 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3384 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3385 }
3386 return JVMTI_ERROR_NONE;
3387 } /* end RawMonitorNotifyAll */
3388
3389
3390 //
3391 // JNI Function Interception functions
3392 //
3393
3394
3395 // function_table - pre-checked for NULL
3396 jvmtiError
3397 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3398 // Copy jni function table at safepoint.
3399 VM_JNIFunctionTableCopier copier(function_table);
3400 VMThread::execute(&copier);
3401
3402 return JVMTI_ERROR_NONE;
3403 } /* end SetJNIFunctionTable */
3404
3405
3406 // function_table - pre-checked for NULL
3407 jvmtiError
3408 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3409 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3410 if (*function_table == NULL)
3411 return JVMTI_ERROR_OUT_OF_MEMORY;
3412 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3413 return JVMTI_ERROR_NONE;
3414 } /* end GetJNIFunctionTable */
3415
3416
3417 //
3418 // Event Management functions
3419 //
3420
3421 jvmtiError
3422 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3423 // can only generate two event types
3424 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3425 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3426 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3427 }
3428
3429 // for compiled_method_load events we must check that the environment
3430 // has the can_generate_compiled_method_load_events capability.
3431 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3432 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3433 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3434 }
3435 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3436 } else {
3437 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3438 }
3439
3440 } /* end GenerateEvents */
3441
3442
3443 //
3444 // Extension Mechanism functions
3445 //
3446
3447 // extension_count_ptr - pre-checked for NULL
3448 // extensions - pre-checked for NULL
3449 jvmtiError
3450 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3451 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3452 } /* end GetExtensionFunctions */
3453
3454
3455 // extension_count_ptr - pre-checked for NULL
3456 // extensions - pre-checked for NULL
3457 jvmtiError
3458 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3459 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3460 } /* end GetExtensionEvents */
3461
3462
3463 // callback - NULL is a valid value, must be checked
3464 jvmtiError
3465 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3466 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3467 } /* end SetExtensionEventCallback */
3468
3469 //
3470 // Timers functions
3471 //
3472
3473 // info_ptr - pre-checked for NULL
3474 jvmtiError
3475 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3476 os::current_thread_cpu_time_info(info_ptr);
3477 return JVMTI_ERROR_NONE;
3478 } /* end GetCurrentThreadCpuTimerInfo */
3479
3480
3481 // nanos_ptr - pre-checked for NULL
3482 jvmtiError
3483 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3484 *nanos_ptr = os::current_thread_cpu_time();
3485 return JVMTI_ERROR_NONE;
3486 } /* end GetCurrentThreadCpuTime */
3487
3488
3489 // info_ptr - pre-checked for NULL
3490 jvmtiError
3491 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3492 os::thread_cpu_time_info(info_ptr);
3493 return JVMTI_ERROR_NONE;
3494 } /* end GetThreadCpuTimerInfo */
3495
3496
3497 // Threads_lock NOT held, java_thread not protected by lock
3498 // java_thread - pre-checked
3499 // nanos_ptr - pre-checked for NULL
3500 jvmtiError
3501 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3502 *nanos_ptr = os::thread_cpu_time(java_thread);
3503 return JVMTI_ERROR_NONE;
3504 } /* end GetThreadCpuTime */
3505
3506
3507 // info_ptr - pre-checked for NULL
3508 jvmtiError
3509 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3510 os::javaTimeNanos_info(info_ptr);
3511 return JVMTI_ERROR_NONE;
3512 } /* end GetTimerInfo */
3513
3514
3515 // nanos_ptr - pre-checked for NULL
3516 jvmtiError
3517 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3518 *nanos_ptr = os::javaTimeNanos();
3519 return JVMTI_ERROR_NONE;
3520 } /* end GetTime */
3521
3522
3523 // processor_count_ptr - pre-checked for NULL
3524 jvmtiError
3525 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3526 *processor_count_ptr = os::active_processor_count();
3527 return JVMTI_ERROR_NONE;
3528 } /* end GetAvailableProcessors */
3529
3530 jvmtiError
3531 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3532 if (sampling_interval < 0) {
3533 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3534 }
3535 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3536 return JVMTI_ERROR_NONE;
3537 } /* end SetHeapSamplingInterval */
3538
3539 //
3540 // System Properties functions
3541 //
3542
3543 // count_ptr - pre-checked for NULL
3544 // property_ptr - pre-checked for NULL
3545 jvmtiError
3546 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3547 jvmtiError err = JVMTI_ERROR_NONE;
3548
3549 // Get the number of readable properties.
3550 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3551
3552 // Allocate memory to hold the exact number of readable properties.
3553 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3554 if (err != JVMTI_ERROR_NONE) {
3555 return err;
3556 }
3557 int readable_count = 0;
3558 // Loop through the system properties until all the readable properties are found.
3559 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3560 if (p->is_readable()) {
3561 const char *key = p->key();
3562 char **tmp_value = *property_ptr+readable_count;
3563 readable_count++;
3564 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3565 if (err == JVMTI_ERROR_NONE) {
3566 strcpy(*tmp_value, key);
3567 } else {
3568 // clean up previously allocated memory.
3569 for (int j = 0; j < readable_count; j++) {
3570 Deallocate((unsigned char*)*property_ptr+j);
3571 }
3572 Deallocate((unsigned char*)property_ptr);
3573 break;
3574 }
3575 }
3576 }
3577 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3578 return err;
3579 } /* end GetSystemProperties */
3580
3581
3582 // property - pre-checked for NULL
3583 // value_ptr - pre-checked for NULL
3584 jvmtiError
3585 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3586 jvmtiError err = JVMTI_ERROR_NONE;
3587 const char *value;
3588
3589 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3590 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3591 if (value == NULL) {
3592 err = JVMTI_ERROR_NOT_AVAILABLE;
3593 } else {
3594 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3595 if (err == JVMTI_ERROR_NONE) {
3596 strcpy(*value_ptr, value);
3597 }
3598 }
3599 return err;
3600 } /* end GetSystemProperty */
3601
3602
3603 // property - pre-checked for NULL
3604 // value - NULL is a valid value, must be checked
3605 jvmtiError
3606 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3607 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3608
3609 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3610 if (strcmp(property, p->key()) == 0) {
3611 if (p->set_writeable_value(value_ptr)) {
3612 err = JVMTI_ERROR_NONE;
3613 }
3614 }
3615 }
3616 return err;
3617 } /* end SetSystemProperty */