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