1 /*
2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/modules.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "interpreter/bytecodeStream.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvmtifiles/jvmtiEnv.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.inline.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jniCheck.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "prims/jvmtiAgentThread.hpp"
45 #include "prims/jvmtiClassFileReconstituter.hpp"
46 #include "prims/jvmtiCodeBlobEvents.hpp"
47 #include "prims/jvmtiExtensions.hpp"
48 #include "prims/jvmtiGetLoadedClasses.hpp"
49 #include "prims/jvmtiHeapTransition.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/heapMonitoring.hpp"
60 #include "runtime/interfaceSupport.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/jfieldIDWorkaround.hpp"
63 #include "runtime/osThread.hpp"
64 #include "runtime/reflectionUtils.hpp"
65 #include "runtime/signature.hpp"
66 #include "runtime/thread.inline.hpp"
67 #include "runtime/threadSMR.hpp"
68 #include "runtime/timerTrace.hpp"
69 #include "runtime/vframe.hpp"
70 #include "runtime/vmThread.hpp"
71 #include "services/threadService.hpp"
72 #include "utilities/exceptions.hpp"
73 #include "utilities/preserveException.hpp"
74
75
76 #define FIXLATER 0 // REMOVE this when completed.
77
78 // FIXLATER: hook into JvmtiTrace
79 #define TraceJVMTICalls false
80
81 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
82 }
83
84 JvmtiEnv::~JvmtiEnv() {
85 }
86
87 JvmtiEnv*
88 JvmtiEnv::create_a_jvmti(jint version) {
89 return new JvmtiEnv(version);
90 }
91
92 // VM operation class to copy jni function table at safepoint.
93 // More than one java threads or jvmti agents may be reading/
94 // modifying jni function tables. To reduce the risk of bad
95 // interaction b/w these threads it is copied at safepoint.
96 class VM_JNIFunctionTableCopier : public VM_Operation {
97 private:
98 const struct JNINativeInterface_ *_function_table;
99 public:
100 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
101 _function_table = func_tbl;
102 };
103
104 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
105 void doit() {
106 copy_jni_function_table(_function_table);
107 };
108 };
109
110 //
111 // Do not change the "prefix" marker below, everything above it is copied
112 // unchanged into the filled stub, everything below is controlled by the
113 // stub filler (only method bodies are carried forward, and then only for
114 // functionality still in the spec).
115 //
116 // end file prefix
117
118 //
119 // Memory Management functions
120 //
121
122 // mem_ptr - pre-checked for NULL
123 jvmtiError
124 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
125 return allocate(size, mem_ptr);
126 } /* end Allocate */
127
128
129 // mem - NULL is a valid value, must be checked
130 jvmtiError
131 JvmtiEnv::Deallocate(unsigned char* mem) {
132 return deallocate(mem);
133 } /* end Deallocate */
134
135 // Threads_lock NOT held, java_thread not protected by lock
136 // java_thread - pre-checked
137 // data - NULL is a valid value, must be checked
138 jvmtiError
139 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
140 JvmtiThreadState* state = java_thread->jvmti_thread_state();
141 if (state == NULL) {
142 if (data == NULL) {
143 // leaving state unset same as data set to NULL
144 return JVMTI_ERROR_NONE;
145 }
146 // otherwise, create the state
147 state = JvmtiThreadState::state_for(java_thread);
148 if (state == NULL) {
149 return JVMTI_ERROR_THREAD_NOT_ALIVE;
150 }
151 }
152 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
153 return JVMTI_ERROR_NONE;
154 } /* end SetThreadLocalStorage */
155
156
157 // Threads_lock NOT held
158 // thread - NOT pre-checked
159 // data_ptr - pre-checked for NULL
160 jvmtiError
161 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
162 JavaThread* current_thread = JavaThread::current();
163 if (thread == NULL) {
164 JvmtiThreadState* state = current_thread->jvmti_thread_state();
165 *data_ptr = (state == NULL) ? NULL :
166 state->env_thread_state(this)->get_agent_thread_local_storage_data();
167 } else {
168 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
169 // the thread to _thread_in_vm. However, when the TLS for a thread
170 // other than the current thread is required we need to transition
171 // from native so as to resolve the jthread.
172
173 ThreadInVMfromNative __tiv(current_thread);
174 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
175 debug_only(VMNativeEntryWrapper __vew;)
176
177 JavaThread* java_thread = NULL;
178 ThreadsListHandle tlh(current_thread);
179 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
180 if (err != JVMTI_ERROR_NONE) {
181 return err;
182 }
183
184 JvmtiThreadState* state = java_thread->jvmti_thread_state();
185 *data_ptr = (state == NULL) ? NULL :
186 state->env_thread_state(this)->get_agent_thread_local_storage_data();
187 }
188 return JVMTI_ERROR_NONE;
189 } /* end GetThreadLocalStorage */
190
191 //
192 // Module functions
193 //
194
195 // module_count_ptr - pre-checked for NULL
196 // modules_ptr - pre-checked for NULL
197 jvmtiError
198 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
199 JvmtiModuleClosure jmc;
200
201 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
202 } /* end GetAllModules */
203
204
205 // class_loader - NULL is a valid value, must be pre-checked
206 // package_name - pre-checked for NULL
207 // module_ptr - pre-checked for NULL
208 jvmtiError
209 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
210 JavaThread* THREAD = JavaThread::current(); // pass to macros
211 ResourceMark rm(THREAD);
212
213 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
214 // Check that loader is a subclass of java.lang.ClassLoader.
215 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
216 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
217 }
218 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
219 if (HAS_PENDING_EXCEPTION) {
220 CLEAR_PENDING_EXCEPTION;
221 return JVMTI_ERROR_INTERNAL; // unexpected exception
222 }
223 *module_ptr = module;
224 return JVMTI_ERROR_NONE;
225 } /* end GetNamedModule */
226
227
228 // module - pre-checked for NULL
229 // to_module - pre-checked for NULL
230 jvmtiError
231 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
232 JavaThread* THREAD = JavaThread::current();
233
234 // check module
235 Handle h_module(THREAD, JNIHandles::resolve(module));
236 if (!java_lang_Module::is_instance(h_module())) {
237 return JVMTI_ERROR_INVALID_MODULE;
238 }
239 // check to_module
240 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
241 if (!java_lang_Module::is_instance(h_to_module())) {
242 return JVMTI_ERROR_INVALID_MODULE;
243 }
244 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
245 } /* end AddModuleReads */
246
247
248 // module - pre-checked for NULL
249 // pkg_name - pre-checked for NULL
250 // to_module - pre-checked for NULL
251 jvmtiError
252 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
253 JavaThread* THREAD = JavaThread::current();
254 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
255
256 // check module
257 Handle h_module(THREAD, JNIHandles::resolve(module));
258 if (!java_lang_Module::is_instance(h_module())) {
259 return JVMTI_ERROR_INVALID_MODULE;
260 }
261 // check to_module
262 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
263 if (!java_lang_Module::is_instance(h_to_module())) {
264 return JVMTI_ERROR_INVALID_MODULE;
265 }
266 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
267 } /* end AddModuleExports */
268
269
270 // module - pre-checked for NULL
271 // pkg_name - pre-checked for NULL
272 // to_module - pre-checked for NULL
273 jvmtiError
274 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
275 JavaThread* THREAD = JavaThread::current();
276 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
277
278 // check module
279 Handle h_module(THREAD, JNIHandles::resolve(module));
280 if (!java_lang_Module::is_instance(h_module())) {
281 return JVMTI_ERROR_INVALID_MODULE;
282 }
283 // check to_module
284 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
285 if (!java_lang_Module::is_instance(h_to_module())) {
286 return JVMTI_ERROR_INVALID_MODULE;
287 }
288 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
289 } /* end AddModuleOpens */
290
291
292 // module - pre-checked for NULL
293 // service - pre-checked for NULL
294 jvmtiError
295 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
296 JavaThread* THREAD = JavaThread::current();
297
298 // check module
299 Handle h_module(THREAD, JNIHandles::resolve(module));
300 if (!java_lang_Module::is_instance(h_module())) {
301 return JVMTI_ERROR_INVALID_MODULE;
302 }
303 // check service
304 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
305 if (!java_lang_Class::is_instance(h_service()) ||
306 java_lang_Class::is_primitive(h_service())) {
307 return JVMTI_ERROR_INVALID_CLASS;
308 }
309 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
310 } /* end AddModuleUses */
311
312
313 // module - pre-checked for NULL
314 // service - pre-checked for NULL
315 // impl_class - pre-checked for NULL
316 jvmtiError
317 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
318 JavaThread* THREAD = JavaThread::current();
319
320 // check module
321 Handle h_module(THREAD, JNIHandles::resolve(module));
322 if (!java_lang_Module::is_instance(h_module())) {
323 return JVMTI_ERROR_INVALID_MODULE;
324 }
325 // check service
326 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
327 if (!java_lang_Class::is_instance(h_service()) ||
328 java_lang_Class::is_primitive(h_service())) {
329 return JVMTI_ERROR_INVALID_CLASS;
330 }
331 // check impl_class
332 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
333 if (!java_lang_Class::is_instance(h_impl_class()) ||
334 java_lang_Class::is_primitive(h_impl_class())) {
335 return JVMTI_ERROR_INVALID_CLASS;
336 }
337 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
338 } /* end AddModuleProvides */
339
340 // module - pre-checked for NULL
341 // is_modifiable_class_ptr - pre-checked for NULL
342 jvmtiError
343 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
344 JavaThread* THREAD = JavaThread::current();
345
346 // check module
347 Handle h_module(THREAD, JNIHandles::resolve(module));
348 if (!java_lang_Module::is_instance(h_module())) {
349 return JVMTI_ERROR_INVALID_MODULE;
350 }
351
352 *is_modifiable_module_ptr = JNI_TRUE;
353 return JVMTI_ERROR_NONE;
354 } /* end IsModifiableModule */
355
356
357 //
358 // Class functions
359 //
360
361 // class_count_ptr - pre-checked for NULL
362 // classes_ptr - pre-checked for NULL
363 jvmtiError
364 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
365 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
366 } /* end GetLoadedClasses */
367
368
369 // initiating_loader - NULL is a valid value, must be checked
370 // class_count_ptr - pre-checked for NULL
371 // classes_ptr - pre-checked for NULL
372 jvmtiError
373 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
374 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
375 class_count_ptr, classes_ptr);
376 } /* end GetClassLoaderClasses */
377
378 // k_mirror - may be primitive, this must be checked
379 // is_modifiable_class_ptr - pre-checked for NULL
380 jvmtiError
381 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
382 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
383 JNI_TRUE : JNI_FALSE;
384 return JVMTI_ERROR_NONE;
385 } /* end IsModifiableClass */
386
387 // class_count - pre-checked to be greater than or equal to 0
388 // classes - pre-checked for NULL
389 jvmtiError
390 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
391 //TODO: add locking
392
393 int index;
394 JavaThread* current_thread = JavaThread::current();
395 ResourceMark rm(current_thread);
396
397 jvmtiClassDefinition* class_definitions =
398 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
399 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
400
401 for (index = 0; index < class_count; index++) {
402 HandleMark hm(current_thread);
403
404 jclass jcls = classes[index];
405 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
406 if (k_mirror == NULL) {
407 return JVMTI_ERROR_INVALID_CLASS;
408 }
409 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
410 return JVMTI_ERROR_INVALID_CLASS;
411 }
412
413 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
414 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
415 }
416
417 Klass* klass = java_lang_Class::as_Klass(k_mirror);
418
419 jint status = klass->jvmti_class_status();
420 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
421 return JVMTI_ERROR_INVALID_CLASS;
422 }
423
424 InstanceKlass* ik = InstanceKlass::cast(klass);
425 if (ik->get_cached_class_file_bytes() == NULL) {
426 // Not cached, we need to reconstitute the class file from the
427 // VM representation. We don't attach the reconstituted class
428 // bytes to the InstanceKlass here because they have not been
429 // validated and we're not at a safepoint.
430 JvmtiClassFileReconstituter reconstituter(ik);
431 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
432 return reconstituter.get_error();
433 }
434
435 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
436 class_definitions[index].class_bytes = (unsigned char*)
437 reconstituter.class_file_bytes();
438 } else {
439 // it is cached, get it from the cache
440 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
441 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
442 }
443 class_definitions[index].klass = jcls;
444 }
445 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
446 VMThread::execute(&op);
447 return (op.check_error());
448 } /* end RetransformClasses */
449
450
451 // class_count - pre-checked to be greater than or equal to 0
452 // class_definitions - pre-checked for NULL
453 jvmtiError
454 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
455 //TODO: add locking
456 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
457 VMThread::execute(&op);
458 return (op.check_error());
459 } /* end RedefineClasses */
460
461
462 //
463 // Object functions
464 //
465
466 // size_ptr - pre-checked for NULL
467 jvmtiError
468 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
469 oop mirror = JNIHandles::resolve_external_guard(object);
470 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
471 *size_ptr = (jlong)mirror->size() * wordSize;
472 return JVMTI_ERROR_NONE;
473 } /* end GetObjectSize */
474
475 //
476 // Method functions
477 //
478
479 // prefix - NULL is a valid value, must be checked
480 jvmtiError
481 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
482 return prefix == NULL?
483 SetNativeMethodPrefixes(0, NULL) :
484 SetNativeMethodPrefixes(1, (char**)&prefix);
485 } /* end SetNativeMethodPrefix */
486
487
488 // prefix_count - pre-checked to be greater than or equal to 0
489 // prefixes - pre-checked for NULL
490 jvmtiError
491 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
492 // Have to grab JVMTI thread state lock to be sure that some thread
493 // isn't accessing the prefixes at the same time we are setting them.
494 // No locks during VM bring-up.
495 if (Threads::number_of_threads() == 0) {
496 return set_native_method_prefixes(prefix_count, prefixes);
497 } else {
498 MutexLocker mu(JvmtiThreadState_lock);
499 return set_native_method_prefixes(prefix_count, prefixes);
500 }
501 } /* end SetNativeMethodPrefixes */
502
503 //
504 // Event Management functions
505 //
506
507 // callbacks - NULL is a valid value, must be checked
508 // size_of_callbacks - pre-checked to be greater than or equal to 0
509 jvmtiError
510 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
511 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
512 return JVMTI_ERROR_NONE;
513 } /* end SetEventCallbacks */
514
515
516 // event_thread - NULL is a valid value, must be checked
517 jvmtiError
518 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
519 if (event_thread == NULL) {
520 // Can be called at Agent_OnLoad() time with event_thread == NULL
521 // when Thread::current() does not work yet so we cannot create a
522 // ThreadsListHandle that is common to both thread-specific and
523 // global code paths.
524
525 // event_type must be valid
526 if (!JvmtiEventController::is_valid_event_type(event_type)) {
527 return JVMTI_ERROR_INVALID_EVENT_TYPE;
528 }
529
530 bool enabled = (mode == JVMTI_ENABLE);
531
532 // assure that needed capabilities are present
533 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
534 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
535 }
536
537 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
538 record_class_file_load_hook_enabled();
539 }
540 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
541 } else {
542 // We have a specified event_thread.
543
544 JavaThread* java_thread = NULL;
545 ThreadsListHandle tlh;
546 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
547 if (err != JVMTI_ERROR_NONE) {
548 return err;
549 }
550
551 // event_type must be valid
552 if (!JvmtiEventController::is_valid_event_type(event_type)) {
553 return JVMTI_ERROR_INVALID_EVENT_TYPE;
554 }
555
556 // global events cannot be controlled at thread level.
557 if (JvmtiEventController::is_global_event(event_type)) {
558 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
559 }
560
561 bool enabled = (mode == JVMTI_ENABLE);
562
563 // assure that needed capabilities are present
564 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
565 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
566 }
567
568 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
569 record_class_file_load_hook_enabled();
570 }
571 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
572 }
573
574 return JVMTI_ERROR_NONE;
575 } /* end SetEventNotificationMode */
576
577 //
578 // Capability functions
579 //
580
581 // capabilities_ptr - pre-checked for NULL
582 jvmtiError
583 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
584 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
585 get_prohibited_capabilities(),
586 capabilities_ptr);
587 return JVMTI_ERROR_NONE;
588 } /* end GetPotentialCapabilities */
589
590
591 // capabilities_ptr - pre-checked for NULL
592 jvmtiError
593 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
594 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
595 get_prohibited_capabilities(),
596 capabilities_ptr,
597 get_capabilities());
598 } /* end AddCapabilities */
599
600
601 // capabilities_ptr - pre-checked for NULL
602 jvmtiError
603 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
604 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
605 return JVMTI_ERROR_NONE;
606 } /* end RelinquishCapabilities */
607
608
609 // capabilities_ptr - pre-checked for NULL
610 jvmtiError
611 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
612 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
613 return JVMTI_ERROR_NONE;
614 } /* end GetCapabilities */
615
616 //
617 // Class Loader Search functions
618 //
619
620 // segment - pre-checked for NULL
621 jvmtiError
622 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
623 jvmtiPhase phase = get_phase();
624 if (phase == JVMTI_PHASE_ONLOAD) {
625 Arguments::append_sysclasspath(segment);
626 return JVMTI_ERROR_NONE;
627 } else if (use_version_1_0_semantics()) {
628 // This JvmtiEnv requested version 1.0 semantics and this function
629 // is only allowed in the ONLOAD phase in version 1.0 so we need to
630 // return an error here.
631 return JVMTI_ERROR_WRONG_PHASE;
632 } else if (phase == JVMTI_PHASE_LIVE) {
633 // The phase is checked by the wrapper that called this function,
634 // but this thread could be racing with the thread that is
635 // terminating the VM so we check one more time.
636
637 // create the zip entry
638 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
639 if (zip_entry == NULL) {
640 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
641 }
642
643 // lock the loader
644 Thread* thread = Thread::current();
645 HandleMark hm;
646 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
647
648 ObjectLocker ol(loader_lock, thread);
649
650 // add the jar file to the bootclasspath
651 log_info(class, load)("opened: %s", zip_entry->name());
652 ClassLoaderExt::append_boot_classpath(zip_entry);
653 return JVMTI_ERROR_NONE;
654 } else {
655 return JVMTI_ERROR_WRONG_PHASE;
656 }
657
658 } /* end AddToBootstrapClassLoaderSearch */
659
660
661 // segment - pre-checked for NULL
662 jvmtiError
663 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
664 jvmtiPhase phase = get_phase();
665
666 if (phase == JVMTI_PHASE_ONLOAD) {
667 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
668 if (strcmp("java.class.path", p->key()) == 0) {
669 p->append_value(segment);
670 break;
671 }
672 }
673 return JVMTI_ERROR_NONE;
674 } else if (phase == JVMTI_PHASE_LIVE) {
675 // The phase is checked by the wrapper that called this function,
676 // but this thread could be racing with the thread that is
677 // terminating the VM so we check one more time.
678 HandleMark hm;
679
680 // create the zip entry (which will open the zip file and hence
681 // check that the segment is indeed a zip file).
682 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
683 if (zip_entry == NULL) {
684 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
685 }
686 delete zip_entry; // no longer needed
687
688 // lock the loader
689 Thread* THREAD = Thread::current();
690 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
691
692 ObjectLocker ol(loader, THREAD);
693
694 // need the path as java.lang.String
695 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
696 if (HAS_PENDING_EXCEPTION) {
697 CLEAR_PENDING_EXCEPTION;
698 return JVMTI_ERROR_INTERNAL;
699 }
700
701 // Invoke the appendToClassPathForInstrumentation method - if the method
702 // is not found it means the loader doesn't support adding to the class path
703 // in the live phase.
704 {
705 JavaValue res(T_VOID);
706 JavaCalls::call_special(&res,
707 loader,
708 loader->klass(),
709 vmSymbols::appendToClassPathForInstrumentation_name(),
710 vmSymbols::appendToClassPathForInstrumentation_signature(),
711 path,
712 THREAD);
713 if (HAS_PENDING_EXCEPTION) {
714 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
715 CLEAR_PENDING_EXCEPTION;
716
717 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
718 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
719 } else {
720 return JVMTI_ERROR_INTERNAL;
721 }
722 }
723 }
724
725 return JVMTI_ERROR_NONE;
726 } else {
727 return JVMTI_ERROR_WRONG_PHASE;
728 }
729 } /* end AddToSystemClassLoaderSearch */
730
731 //
732 // General functions
733 //
734
735 // phase_ptr - pre-checked for NULL
736 jvmtiError
737 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
738 *phase_ptr = phase();
739 return JVMTI_ERROR_NONE;
740 } /* end GetPhase */
741
742
743 jvmtiError
744 JvmtiEnv::DisposeEnvironment() {
745 dispose();
746 return JVMTI_ERROR_NONE;
747 } /* end DisposeEnvironment */
748
749
750 // data - NULL is a valid value, must be checked
751 jvmtiError
752 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
753 set_env_local_storage(data);
754 return JVMTI_ERROR_NONE;
755 } /* end SetEnvironmentLocalStorage */
756
757
758 // data_ptr - pre-checked for NULL
759 jvmtiError
760 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
761 *data_ptr = (void*)get_env_local_storage();
762 return JVMTI_ERROR_NONE;
763 } /* end GetEnvironmentLocalStorage */
764
765 // version_ptr - pre-checked for NULL
766 jvmtiError
767 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
768 *version_ptr = JVMTI_VERSION;
769 return JVMTI_ERROR_NONE;
770 } /* end GetVersionNumber */
771
772
773 // name_ptr - pre-checked for NULL
774 jvmtiError
775 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
776 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
777 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
778 }
779 const char *name = JvmtiUtil::error_name(error);
780 if (name == NULL) {
781 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
782 }
783 size_t len = strlen(name) + 1;
784 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
785 if (err == JVMTI_ERROR_NONE) {
786 memcpy(*name_ptr, name, len);
787 }
788 return err;
789 } /* end GetErrorName */
790
791
792 jvmtiError
793 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
794 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
795 switch (flag) {
796 case JVMTI_VERBOSE_OTHER:
797 // ignore
798 break;
799 case JVMTI_VERBOSE_CLASS:
800 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
801 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
802 break;
803 case JVMTI_VERBOSE_GC:
804 if (value == 0) {
805 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
806 } else {
807 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
808 }
809 break;
810 case JVMTI_VERBOSE_JNI:
811 PrintJNIResolving = value != 0;
812 break;
813 default:
814 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
815 };
816 return JVMTI_ERROR_NONE;
817 } /* end SetVerboseFlag */
818
819
820 // format_ptr - pre-checked for NULL
821 jvmtiError
822 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
823 *format_ptr = JVMTI_JLOCATION_JVMBCI;
824 return JVMTI_ERROR_NONE;
825 } /* end GetJLocationFormat */
826
827 //
828 // Thread functions
829 //
830
831 // Threads_lock NOT held
832 // thread - NOT pre-checked
833 // thread_state_ptr - pre-checked for NULL
834 jvmtiError
835 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
836 JavaThread* current_thread = JavaThread::current();
837 JavaThread* java_thread = NULL;
838 oop thread_oop = NULL;
839 ThreadsListHandle tlh(current_thread);
840
841 if (thread == NULL) {
842 java_thread = current_thread;
843 thread_oop = java_thread->threadObj();
844
845 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
846 return JVMTI_ERROR_INVALID_THREAD;
847 }
848 } else {
849 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
850 if (err != JVMTI_ERROR_NONE) {
851 // We got an error code so we don't have a JavaThread *, but
852 // only return an error from here if we didn't get a valid
853 // thread_oop.
854 if (thread_oop == NULL) {
855 return err;
856 }
857 // We have a valid thread_oop so we can return some thread state.
858 }
859 }
860
861 // get most state bits
862 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
863
864 if (java_thread != NULL) {
865 // We have a JavaThread* so add more state bits.
866 JavaThreadState jts = java_thread->thread_state();
867
868 if (java_thread->is_being_ext_suspended()) {
869 state |= JVMTI_THREAD_STATE_SUSPENDED;
870 }
871 if (jts == _thread_in_native) {
872 state |= JVMTI_THREAD_STATE_IN_NATIVE;
873 }
874 OSThread* osThread = java_thread->osthread();
875 if (osThread != NULL && osThread->interrupted()) {
876 state |= JVMTI_THREAD_STATE_INTERRUPTED;
877 }
878 }
879
880 *thread_state_ptr = state;
881 return JVMTI_ERROR_NONE;
882 } /* end GetThreadState */
883
884
885 // thread_ptr - pre-checked for NULL
886 jvmtiError
887 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
888 JavaThread* current_thread = JavaThread::current();
889 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
890 return JVMTI_ERROR_NONE;
891 } /* end GetCurrentThread */
892
893
894 // threads_count_ptr - pre-checked for NULL
895 // threads_ptr - pre-checked for NULL
896 jvmtiError
897 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
898 int nthreads = 0;
899 Handle *thread_objs = NULL;
900 ResourceMark rm;
901 HandleMark hm;
902
903 // enumerate threads (including agent threads)
904 ThreadsListEnumerator tle(Thread::current(), true);
905 nthreads = tle.num_threads();
906 *threads_count_ptr = nthreads;
907
908 if (nthreads == 0) {
909 *threads_ptr = NULL;
910 return JVMTI_ERROR_NONE;
911 }
912
913 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
914 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
915
916 for (int i=0; i < nthreads; i++) {
917 thread_objs[i] = Handle(tle.get_threadObj(i));
918 }
919
920 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
921 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
922
923 *threads_ptr = jthreads;
924 return JVMTI_ERROR_NONE;
925 } /* end GetAllThreads */
926
927
928 // Threads_lock NOT held, java_thread not protected by lock
929 // java_thread - pre-checked
930 jvmtiError
931 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
932 // don't allow hidden thread suspend request.
933 if (java_thread->is_hidden_from_external_view()) {
934 return (JVMTI_ERROR_NONE);
935 }
936
937 {
938 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
939 if (java_thread->is_external_suspend()) {
940 // don't allow nested external suspend requests.
941 return (JVMTI_ERROR_THREAD_SUSPENDED);
942 }
943 if (java_thread->is_exiting()) { // thread is in the process of exiting
944 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
945 }
946 java_thread->set_external_suspend();
947 }
948
949 if (!JvmtiSuspendControl::suspend(java_thread)) {
950 // the thread was in the process of exiting
951 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
952 }
953 return JVMTI_ERROR_NONE;
954 } /* end SuspendThread */
955
956
957 // request_count - pre-checked to be greater than or equal to 0
958 // request_list - pre-checked for NULL
959 // results - pre-checked for NULL
960 jvmtiError
961 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
962 int needSafepoint = 0; // > 0 if we need a safepoint
963 ThreadsListHandle tlh;
964 for (int i = 0; i < request_count; i++) {
965 JavaThread *java_thread = NULL;
966 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
967 if (err != JVMTI_ERROR_NONE) {
968 results[i] = err;
969 continue;
970 }
971 // don't allow hidden thread suspend request.
972 if (java_thread->is_hidden_from_external_view()) {
973 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
974 continue;
975 }
976
977 {
978 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
979 if (java_thread->is_external_suspend()) {
980 // don't allow nested external suspend requests.
981 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
982 continue;
983 }
984 if (java_thread->is_exiting()) { // thread is in the process of exiting
985 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
986 continue;
987 }
988 java_thread->set_external_suspend();
989 }
990 if (java_thread->thread_state() == _thread_in_native) {
991 // We need to try and suspend native threads here. Threads in
992 // other states will self-suspend on their next transition.
993 if (!JvmtiSuspendControl::suspend(java_thread)) {
994 // The thread was in the process of exiting. Force another
995 // safepoint to make sure that this thread transitions.
996 needSafepoint++;
997 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
998 continue;
999 }
1000 } else {
1001 needSafepoint++;
1002 }
1003 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1004 }
1005 if (needSafepoint > 0) {
1006 VM_ThreadsSuspendJVMTI tsj;
1007 VMThread::execute(&tsj);
1008 }
1009 // per-thread suspend results returned via results parameter
1010 return JVMTI_ERROR_NONE;
1011 } /* end SuspendThreadList */
1012
1013
1014 // Threads_lock NOT held, java_thread not protected by lock
1015 // java_thread - pre-checked
1016 jvmtiError
1017 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1018 // don't allow hidden thread resume request.
1019 if (java_thread->is_hidden_from_external_view()) {
1020 return JVMTI_ERROR_NONE;
1021 }
1022
1023 if (!java_thread->is_being_ext_suspended()) {
1024 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1025 }
1026
1027 if (!JvmtiSuspendControl::resume(java_thread)) {
1028 return JVMTI_ERROR_INTERNAL;
1029 }
1030 return JVMTI_ERROR_NONE;
1031 } /* end ResumeThread */
1032
1033
1034 // request_count - pre-checked to be greater than or equal to 0
1035 // request_list - pre-checked for NULL
1036 // results - pre-checked for NULL
1037 jvmtiError
1038 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1039 ThreadsListHandle tlh;
1040 for (int i = 0; i < request_count; i++) {
1041 JavaThread* java_thread = NULL;
1042 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1043 if (err != JVMTI_ERROR_NONE) {
1044 results[i] = err;
1045 continue;
1046 }
1047 // don't allow hidden thread resume request.
1048 if (java_thread->is_hidden_from_external_view()) {
1049 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1050 continue;
1051 }
1052 if (!java_thread->is_being_ext_suspended()) {
1053 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1054 continue;
1055 }
1056
1057 if (!JvmtiSuspendControl::resume(java_thread)) {
1058 results[i] = JVMTI_ERROR_INTERNAL;
1059 continue;
1060 }
1061
1062 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1063 }
1064 // per-thread resume results returned via results parameter
1065 return JVMTI_ERROR_NONE;
1066 } /* end ResumeThreadList */
1067
1068
1069 // Threads_lock NOT held, java_thread not protected by lock
1070 // java_thread - pre-checked
1071 jvmtiError
1072 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1073 oop e = JNIHandles::resolve_external_guard(exception);
1074 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1075
1076 JavaThread::send_async_exception(java_thread->threadObj(), e);
1077
1078 return JVMTI_ERROR_NONE;
1079
1080 } /* end StopThread */
1081
1082
1083 // Threads_lock NOT held
1084 // thread - NOT pre-checked
1085 jvmtiError
1086 JvmtiEnv::InterruptThread(jthread thread) {
1087 // TODO: this is very similar to JVM_Interrupt(); share code in future
1088 JavaThread* current_thread = JavaThread::current();
1089 JavaThread* java_thread = NULL;
1090 ThreadsListHandle tlh(current_thread);
1091 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1092 if (err != JVMTI_ERROR_NONE) {
1093 return err;
1094 }
1095
1096 Thread::interrupt(java_thread);
1097
1098 return JVMTI_ERROR_NONE;
1099 } /* end InterruptThread */
1100
1101
1102 // Threads_lock NOT held
1103 // thread - NOT pre-checked
1104 // info_ptr - pre-checked for NULL
1105 jvmtiError
1106 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1107 ResourceMark rm;
1108 HandleMark hm;
1109
1110 JavaThread* current_thread = JavaThread::current();
1111 ThreadsListHandle tlh(current_thread);
1112
1113 // if thread is NULL the current thread is used
1114 oop thread_oop = NULL;
1115 if (thread == NULL) {
1116 thread_oop = current_thread->threadObj();
1117 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1118 return JVMTI_ERROR_INVALID_THREAD;
1119 }
1120 } else {
1121 JavaThread* java_thread = NULL;
1122 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1123 if (err != JVMTI_ERROR_NONE) {
1124 // We got an error code so we don't have a JavaThread *, but
1125 // only return an error from here if we didn't get a valid
1126 // thread_oop.
1127 if (thread_oop == NULL) {
1128 return err;
1129 }
1130 // We have a valid thread_oop so we can return some thread info.
1131 }
1132 }
1133
1134 Handle thread_obj(current_thread, thread_oop);
1135 Handle name;
1136 ThreadPriority priority;
1137 Handle thread_group;
1138 Handle context_class_loader;
1139 bool is_daemon;
1140
1141 { MutexLocker mu(Threads_lock);
1142
1143 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1144 priority = java_lang_Thread::priority(thread_obj());
1145 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1146 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1147
1148 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1149 context_class_loader = Handle(current_thread, loader);
1150 }
1151 { const char *n;
1152
1153 if (name() != NULL) {
1154 n = java_lang_String::as_utf8_string(name());
1155 } else {
1156 int utf8_length = 0;
1157 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1158 }
1159
1160 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1161 if (info_ptr->name == NULL)
1162 return JVMTI_ERROR_OUT_OF_MEMORY;
1163
1164 strcpy(info_ptr->name, n);
1165 }
1166 info_ptr->is_daemon = is_daemon;
1167 info_ptr->priority = priority;
1168
1169 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1170 jni_reference(context_class_loader);
1171 info_ptr->thread_group = jni_reference(thread_group);
1172
1173 return JVMTI_ERROR_NONE;
1174 } /* end GetThreadInfo */
1175
1176
1177 // Threads_lock NOT held, java_thread not protected by lock
1178 // java_thread - pre-checked
1179 // owned_monitor_count_ptr - pre-checked for NULL
1180 // owned_monitors_ptr - pre-checked for NULL
1181 jvmtiError
1182 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1183 jvmtiError err = JVMTI_ERROR_NONE;
1184 JavaThread* calling_thread = JavaThread::current();
1185
1186 // growable array of jvmti monitors info on the C-heap
1187 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1188 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1189
1190 // It is only safe to perform the direct operation on the current
1191 // thread. All other usage needs to use a vm-safepoint-op for safety.
1192 if (java_thread == calling_thread) {
1193 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1194 } else {
1195 // JVMTI get monitors info at safepoint. Do not require target thread to
1196 // be suspended.
1197 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1198 VMThread::execute(&op);
1199 err = op.result();
1200 }
1201 jint owned_monitor_count = owned_monitors_list->length();
1202 if (err == JVMTI_ERROR_NONE) {
1203 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1204 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1205 // copy into the returned array
1206 for (int i = 0; i < owned_monitor_count; i++) {
1207 (*owned_monitors_ptr)[i] =
1208 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1209 }
1210 *owned_monitor_count_ptr = owned_monitor_count;
1211 }
1212 }
1213 // clean up.
1214 for (int i = 0; i < owned_monitor_count; i++) {
1215 deallocate((unsigned char*)owned_monitors_list->at(i));
1216 }
1217 delete owned_monitors_list;
1218
1219 return err;
1220 } /* end GetOwnedMonitorInfo */
1221
1222
1223 // Threads_lock NOT held, java_thread not protected by lock
1224 // java_thread - pre-checked
1225 // monitor_info_count_ptr - pre-checked for NULL
1226 // monitor_info_ptr - pre-checked for NULL
1227 jvmtiError
1228 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1229 jvmtiError err = JVMTI_ERROR_NONE;
1230 JavaThread* calling_thread = JavaThread::current();
1231
1232 // growable array of jvmti monitors info on the C-heap
1233 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1234 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1235
1236 // It is only safe to perform the direct operation on the current
1237 // thread. All other usage needs to use a vm-safepoint-op for safety.
1238 if (java_thread == calling_thread) {
1239 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1240 } else {
1241 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1242 // be suspended.
1243 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1244 VMThread::execute(&op);
1245 err = op.result();
1246 }
1247
1248 jint owned_monitor_count = owned_monitors_list->length();
1249 if (err == JVMTI_ERROR_NONE) {
1250 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1251 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1252 // copy to output array.
1253 for (int i = 0; i < owned_monitor_count; i++) {
1254 (*monitor_info_ptr)[i].monitor =
1255 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1256 (*monitor_info_ptr)[i].stack_depth =
1257 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1258 }
1259 }
1260 *monitor_info_count_ptr = owned_monitor_count;
1261 }
1262
1263 // clean up.
1264 for (int i = 0; i < owned_monitor_count; i++) {
1265 deallocate((unsigned char*)owned_monitors_list->at(i));
1266 }
1267 delete owned_monitors_list;
1268
1269 return err;
1270 } /* end GetOwnedMonitorStackDepthInfo */
1271
1272
1273 // Threads_lock NOT held, java_thread not protected by lock
1274 // java_thread - pre-checked
1275 // monitor_ptr - pre-checked for NULL
1276 jvmtiError
1277 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1278 jvmtiError err = JVMTI_ERROR_NONE;
1279 JavaThread* calling_thread = JavaThread::current();
1280
1281 // It is only safe to perform the direct operation on the current
1282 // thread. All other usage needs to use a vm-safepoint-op for safety.
1283 if (java_thread == calling_thread) {
1284 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1285 } else {
1286 // get contended monitor information at safepoint.
1287 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1288 VMThread::execute(&op);
1289 err = op.result();
1290 }
1291 return err;
1292 } /* end GetCurrentContendedMonitor */
1293
1294
1295 // Threads_lock NOT held
1296 // thread - NOT pre-checked
1297 // proc - pre-checked for NULL
1298 // arg - NULL is a valid value, must be checked
1299 jvmtiError
1300 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1301 JavaThread* current_thread = JavaThread::current();
1302
1303 JavaThread* java_thread = NULL;
1304 oop thread_oop = NULL;
1305 ThreadsListHandle tlh(current_thread);
1306 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1307 if (err != JVMTI_ERROR_NONE) {
1308 // We got an error code so we don't have a JavaThread *, but
1309 // only return an error from here if we didn't get a valid
1310 // thread_oop.
1311 if (thread_oop == NULL) {
1312 return err;
1313 }
1314 // We have a valid thread_oop.
1315 }
1316
1317 if (java_thread != NULL) {
1318 // 'thread' refers to an existing JavaThread.
1319 return JVMTI_ERROR_INVALID_THREAD;
1320 }
1321
1322 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1323 return JVMTI_ERROR_INVALID_PRIORITY;
1324 }
1325
1326 Handle thread_hndl(current_thread, thread_oop);
1327 {
1328 MutexLocker mu(Threads_lock); // grab Threads_lock
1329
1330 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1331
1332 // At this point it may be possible that no osthread was created for the
1333 // JavaThread due to lack of memory.
1334 if (new_thread == NULL || new_thread->osthread() == NULL) {
1335 if (new_thread != NULL) {
1336 new_thread->smr_delete();
1337 }
1338 return JVMTI_ERROR_OUT_OF_MEMORY;
1339 }
1340
1341 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1342 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1343 java_lang_Thread::set_daemon(thread_hndl());
1344
1345 new_thread->set_threadObj(thread_hndl());
1346 Threads::add(new_thread);
1347 Thread::start(new_thread);
1348 } // unlock Threads_lock
1349
1350 return JVMTI_ERROR_NONE;
1351 } /* end RunAgentThread */
1352
1353 //
1354 // Thread Group functions
1355 //
1356
1357 // group_count_ptr - pre-checked for NULL
1358 // groups_ptr - pre-checked for NULL
1359 jvmtiError
1360 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1361 JavaThread* current_thread = JavaThread::current();
1362
1363 // Only one top level thread group now.
1364 *group_count_ptr = 1;
1365
1366 // Allocate memory to store global-refs to the thread groups.
1367 // Assume this area is freed by caller.
1368 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1369
1370 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1371
1372 // Convert oop to Handle, then convert Handle to global-ref.
1373 {
1374 HandleMark hm(current_thread);
1375 Handle system_thread_group(current_thread, Universe::system_thread_group());
1376 *groups_ptr[0] = jni_reference(system_thread_group);
1377 }
1378
1379 return JVMTI_ERROR_NONE;
1380 } /* end GetTopThreadGroups */
1381
1382
1383 // info_ptr - pre-checked for NULL
1384 jvmtiError
1385 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1386 ResourceMark rm;
1387 HandleMark hm;
1388
1389 JavaThread* current_thread = JavaThread::current();
1390
1391 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1392 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1393
1394 const char* name;
1395 Handle parent_group;
1396 bool is_daemon;
1397 ThreadPriority max_priority;
1398
1399 { MutexLocker mu(Threads_lock);
1400
1401 name = java_lang_ThreadGroup::name(group_obj());
1402 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1403 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1404 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1405 }
1406
1407 info_ptr->is_daemon = is_daemon;
1408 info_ptr->max_priority = max_priority;
1409 info_ptr->parent = jni_reference(parent_group);
1410
1411 if (name != NULL) {
1412 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1413 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1414 strcpy(info_ptr->name, name);
1415 } else {
1416 info_ptr->name = NULL;
1417 }
1418
1419 return JVMTI_ERROR_NONE;
1420 } /* end GetThreadGroupInfo */
1421
1422
1423 // thread_count_ptr - pre-checked for NULL
1424 // threads_ptr - pre-checked for NULL
1425 // group_count_ptr - pre-checked for NULL
1426 // groups_ptr - pre-checked for NULL
1427 jvmtiError
1428 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1429 JavaThread* current_thread = JavaThread::current();
1430 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1431 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1432
1433 Handle *thread_objs = NULL;
1434 Handle *group_objs = NULL;
1435 int nthreads = 0;
1436 int ngroups = 0;
1437 int hidden_threads = 0;
1438
1439 ResourceMark rm(current_thread);
1440 HandleMark hm(current_thread);
1441
1442 Handle group_hdl(current_thread, group_obj);
1443
1444 { // Cannot allow thread or group counts to change.
1445 MutexLocker mu(Threads_lock);
1446
1447 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1448 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1449
1450 if (nthreads > 0) {
1451 ThreadsListHandle tlh(current_thread);
1452 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1453 assert(nthreads <= threads->length(), "too many threads");
1454 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1455 for (int i=0, j=0; i<nthreads; i++) {
1456 oop thread_obj = threads->obj_at(i);
1457 assert(thread_obj != NULL, "thread_obj is NULL");
1458 JavaThread *java_thread = NULL;
1459 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1460 if (err == JVMTI_ERROR_NONE) {
1461 // Have a valid JavaThread*.
1462 if (java_thread->is_hidden_from_external_view()) {
1463 // Filter out hidden java threads.
1464 hidden_threads++;
1465 continue;
1466 }
1467 } else {
1468 // We couldn't convert thread_obj into a JavaThread*.
1469 if (err == JVMTI_ERROR_INVALID_THREAD) {
1470 // The thread_obj does not refer to a java.lang.Thread object
1471 // so skip it.
1472 hidden_threads++;
1473 continue;
1474 }
1475 // We have a valid thread_obj, but no JavaThread*; the caller
1476 // can still have limited use for the thread_obj.
1477 }
1478 thread_objs[j++] = Handle(current_thread, thread_obj);
1479 }
1480 nthreads -= hidden_threads;
1481 } // ThreadsListHandle is destroyed here.
1482
1483 if (ngroups > 0) {
1484 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1485 assert(ngroups <= groups->length(), "too many groups");
1486 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1487 for (int i=0; i<ngroups; i++) {
1488 oop group_obj = groups->obj_at(i);
1489 assert(group_obj != NULL, "group_obj != NULL");
1490 group_objs[i] = Handle(current_thread, group_obj);
1491 }
1492 }
1493 }
1494
1495 // have to make global handles outside of Threads_lock
1496 *group_count_ptr = ngroups;
1497 *thread_count_ptr = nthreads;
1498 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1499 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1500 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1501 return JVMTI_ERROR_OUT_OF_MEMORY;
1502 }
1503 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1504 return JVMTI_ERROR_OUT_OF_MEMORY;
1505 }
1506
1507 return JVMTI_ERROR_NONE;
1508 } /* end GetThreadGroupChildren */
1509
1510
1511 //
1512 // Stack Frame functions
1513 //
1514
1515 // Threads_lock NOT held, java_thread not protected by lock
1516 // java_thread - pre-checked
1517 // max_frame_count - pre-checked to be greater than or equal to 0
1518 // frame_buffer - pre-checked for NULL
1519 // count_ptr - pre-checked for NULL
1520 jvmtiError
1521 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1522 jvmtiError err = JVMTI_ERROR_NONE;
1523
1524 // It is only safe to perform the direct operation on the current
1525 // thread. All other usage needs to use a vm-safepoint-op for safety.
1526 if (java_thread == JavaThread::current()) {
1527 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1528 } else {
1529 // JVMTI get stack trace at safepoint. Do not require target thread to
1530 // be suspended.
1531 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1532 VMThread::execute(&op);
1533 err = op.result();
1534 }
1535
1536 return err;
1537 } /* end GetStackTrace */
1538
1539
1540 // max_frame_count - pre-checked to be greater than or equal to 0
1541 // stack_info_ptr - pre-checked for NULL
1542 // thread_count_ptr - pre-checked for NULL
1543 jvmtiError
1544 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1545 jvmtiError err = JVMTI_ERROR_NONE;
1546 JavaThread* calling_thread = JavaThread::current();
1547
1548 // JVMTI get stack traces at safepoint.
1549 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1550 VMThread::execute(&op);
1551 *thread_count_ptr = op.final_thread_count();
1552 *stack_info_ptr = op.stack_info();
1553 err = op.result();
1554 return err;
1555 } /* end GetAllStackTraces */
1556
1557
1558 // thread_count - pre-checked to be greater than or equal to 0
1559 // thread_list - pre-checked for NULL
1560 // max_frame_count - pre-checked to be greater than or equal to 0
1561 // stack_info_ptr - pre-checked for NULL
1562 jvmtiError
1563 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1564 jvmtiError err = JVMTI_ERROR_NONE;
1565 // JVMTI get stack traces at safepoint.
1566 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1567 VMThread::execute(&op);
1568 err = op.result();
1569 if (err == JVMTI_ERROR_NONE) {
1570 *stack_info_ptr = op.stack_info();
1571 }
1572 return err;
1573 } /* end GetThreadListStackTraces */
1574
1575
1576 // Threads_lock NOT held, java_thread not protected by lock
1577 // java_thread - pre-checked
1578 // count_ptr - pre-checked for NULL
1579 jvmtiError
1580 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1581 jvmtiError err = JVMTI_ERROR_NONE;
1582
1583 // retrieve or create JvmtiThreadState.
1584 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1585 if (state == NULL) {
1586 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1587 }
1588
1589 // It is only safe to perform the direct operation on the current
1590 // thread. All other usage needs to use a vm-safepoint-op for safety.
1591 if (java_thread == JavaThread::current()) {
1592 err = get_frame_count(state, count_ptr);
1593 } else {
1594 // get java stack frame count at safepoint.
1595 VM_GetFrameCount op(this, state, count_ptr);
1596 VMThread::execute(&op);
1597 err = op.result();
1598 }
1599 return err;
1600 } /* end GetFrameCount */
1601
1602
1603 // Threads_lock NOT held, java_thread not protected by lock
1604 // java_thread - pre-checked
1605 jvmtiError
1606 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1607 JavaThread* current_thread = JavaThread::current();
1608 HandleMark hm(current_thread);
1609 uint32_t debug_bits = 0;
1610
1611 // retrieve or create the state
1612 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1613 if (state == NULL) {
1614 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1615 }
1616
1617 // Check if java_thread is fully suspended
1618 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1619 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1620 }
1621 // Check to see if a PopFrame was already in progress
1622 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1623 // Probably possible for JVMTI clients to trigger this, but the
1624 // JPDA backend shouldn't allow this to happen
1625 return JVMTI_ERROR_INTERNAL;
1626 }
1627
1628 {
1629 // Was workaround bug
1630 // 4812902: popFrame hangs if the method is waiting at a synchronize
1631 // Catch this condition and return an error to avoid hanging.
1632 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1633 OSThread* osThread = java_thread->osthread();
1634 if (osThread->get_state() == MONITOR_WAIT) {
1635 return JVMTI_ERROR_OPAQUE_FRAME;
1636 }
1637 }
1638
1639 {
1640 ResourceMark rm(current_thread);
1641 // Check if there are more than one Java frame in this thread, that the top two frames
1642 // are Java (not native) frames, and that there is no intervening VM frame
1643 int frame_count = 0;
1644 bool is_interpreted[2];
1645 intptr_t *frame_sp[2];
1646 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1647 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1648 methodHandle mh(current_thread, vfs.method());
1649 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1650 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1651 frame_sp[frame_count] = vfs.frame_id();
1652 if (++frame_count > 1) break;
1653 }
1654 if (frame_count < 2) {
1655 // We haven't found two adjacent non-native Java frames on the top.
1656 // There can be two situations here:
1657 // 1. There are no more java frames
1658 // 2. Two top java frames are separated by non-java native frames
1659 if(vframeFor(java_thread, 1) == NULL) {
1660 return JVMTI_ERROR_NO_MORE_FRAMES;
1661 } else {
1662 // Intervening non-java native or VM frames separate java frames.
1663 // Current implementation does not support this. See bug #5031735.
1664 // In theory it is possible to pop frames in such cases.
1665 return JVMTI_ERROR_OPAQUE_FRAME;
1666 }
1667 }
1668
1669 // If any of the top 2 frames is a compiled one, need to deoptimize it
1670 for (int i = 0; i < 2; i++) {
1671 if (!is_interpreted[i]) {
1672 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1673 }
1674 }
1675
1676 // Update the thread state to reflect that the top frame is popped
1677 // so that cur_stack_depth is maintained properly and all frameIDs
1678 // are invalidated.
1679 // The current frame will be popped later when the suspended thread
1680 // is resumed and right before returning from VM to Java.
1681 // (see call_VM_base() in assembler_<cpu>.cpp).
1682
1683 // It's fine to update the thread state here because no JVMTI events
1684 // shall be posted for this PopFrame.
1685
1686 // It is only safe to perform the direct operation on the current
1687 // thread. All other usage needs to use a vm-safepoint-op for safety.
1688 if (java_thread == JavaThread::current()) {
1689 state->update_for_pop_top_frame();
1690 } else {
1691 VM_UpdateForPopTopFrame op(state);
1692 VMThread::execute(&op);
1693 jvmtiError err = op.result();
1694 if (err != JVMTI_ERROR_NONE) {
1695 return err;
1696 }
1697 }
1698
1699 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1700 // Set pending step flag for this popframe and it is cleared when next
1701 // step event is posted.
1702 state->set_pending_step_for_popframe();
1703 }
1704
1705 return JVMTI_ERROR_NONE;
1706 } /* end PopFrame */
1707
1708
1709 // Threads_lock NOT held, java_thread not protected by lock
1710 // java_thread - pre-checked
1711 // java_thread - unchecked
1712 // depth - pre-checked as non-negative
1713 // method_ptr - pre-checked for NULL
1714 // location_ptr - pre-checked for NULL
1715 jvmtiError
1716 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1717 jvmtiError err = JVMTI_ERROR_NONE;
1718
1719 // It is only safe to perform the direct operation on the current
1720 // thread. All other usage needs to use a vm-safepoint-op for safety.
1721 if (java_thread == JavaThread::current()) {
1722 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1723 } else {
1724 // JVMTI get java stack frame location at safepoint.
1725 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1726 VMThread::execute(&op);
1727 err = op.result();
1728 }
1729 return err;
1730 } /* end GetFrameLocation */
1731
1732
1733 // Threads_lock NOT held, java_thread not protected by lock
1734 // java_thread - pre-checked
1735 // java_thread - unchecked
1736 // depth - pre-checked as non-negative
1737 jvmtiError
1738 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1739 jvmtiError err = JVMTI_ERROR_NONE;
1740 ResourceMark rm;
1741 uint32_t debug_bits = 0;
1742
1743 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1744 if (state == NULL) {
1745 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1746 }
1747
1748 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1749 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1750 }
1751
1752 if (TraceJVMTICalls) {
1753 JvmtiSuspendControl::print();
1754 }
1755
1756 vframe *vf = vframeFor(java_thread, depth);
1757 if (vf == NULL) {
1758 return JVMTI_ERROR_NO_MORE_FRAMES;
1759 }
1760
1761 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1762 return JVMTI_ERROR_OPAQUE_FRAME;
1763 }
1764
1765 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1766
1767 // It is only safe to perform the direct operation on the current
1768 // thread. All other usage needs to use a vm-safepoint-op for safety.
1769 if (java_thread == JavaThread::current()) {
1770 int frame_number = state->count_frames() - depth;
1771 state->env_thread_state(this)->set_frame_pop(frame_number);
1772 } else {
1773 VM_SetFramePop op(this, state, depth);
1774 VMThread::execute(&op);
1775 err = op.result();
1776 }
1777 return err;
1778 } /* end NotifyFramePop */
1779
1780
1781 //
1782 // Force Early Return functions
1783 //
1784
1785 // Threads_lock NOT held, java_thread not protected by lock
1786 // java_thread - pre-checked
1787 jvmtiError
1788 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1789 jvalue val;
1790 val.l = value;
1791 return force_early_return(java_thread, val, atos);
1792 } /* end ForceEarlyReturnObject */
1793
1794
1795 // Threads_lock NOT held, java_thread not protected by lock
1796 // java_thread - pre-checked
1797 jvmtiError
1798 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1799 jvalue val;
1800 val.i = value;
1801 return force_early_return(java_thread, val, itos);
1802 } /* end ForceEarlyReturnInt */
1803
1804
1805 // Threads_lock NOT held, java_thread not protected by lock
1806 // java_thread - pre-checked
1807 jvmtiError
1808 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1809 jvalue val;
1810 val.j = value;
1811 return force_early_return(java_thread, val, ltos);
1812 } /* end ForceEarlyReturnLong */
1813
1814
1815 // Threads_lock NOT held, java_thread not protected by lock
1816 // java_thread - pre-checked
1817 jvmtiError
1818 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1819 jvalue val;
1820 val.f = value;
1821 return force_early_return(java_thread, val, ftos);
1822 } /* end ForceEarlyReturnFloat */
1823
1824
1825 // Threads_lock NOT held, java_thread not protected by lock
1826 // java_thread - pre-checked
1827 jvmtiError
1828 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1829 jvalue val;
1830 val.d = value;
1831 return force_early_return(java_thread, val, dtos);
1832 } /* end ForceEarlyReturnDouble */
1833
1834
1835 // Threads_lock NOT held, java_thread not protected by lock
1836 // java_thread - pre-checked
1837 jvmtiError
1838 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1839 jvalue val;
1840 val.j = 0L;
1841 return force_early_return(java_thread, val, vtos);
1842 } /* end ForceEarlyReturnVoid */
1843
1844
1845 //
1846 // Heap functions
1847 //
1848
1849 // klass - NULL is a valid value, must be checked
1850 // initial_object - NULL is a valid value, must be checked
1851 // callbacks - pre-checked for NULL
1852 // user_data - NULL is a valid value, must be checked
1853 jvmtiError
1854 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1855 // check klass if provided
1856 Klass* k = NULL;
1857 if (klass != NULL) {
1858 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1859 if (k_mirror == NULL) {
1860 return JVMTI_ERROR_INVALID_CLASS;
1861 }
1862 if (java_lang_Class::is_primitive(k_mirror)) {
1863 return JVMTI_ERROR_NONE;
1864 }
1865 k = java_lang_Class::as_Klass(k_mirror);
1866 if (klass == NULL) {
1867 return JVMTI_ERROR_INVALID_CLASS;
1868 }
1869 }
1870
1871 if (initial_object != NULL) {
1872 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1873 if (init_obj == NULL) {
1874 return JVMTI_ERROR_INVALID_OBJECT;
1875 }
1876 }
1877
1878 Thread *thread = Thread::current();
1879 HandleMark hm(thread);
1880
1881 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1882 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1883 return JVMTI_ERROR_NONE;
1884 } /* end FollowReferences */
1885
1886
1887 // klass - NULL is a valid value, must be checked
1888 // callbacks - pre-checked for NULL
1889 // user_data - NULL is a valid value, must be checked
1890 jvmtiError
1891 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1892 // check klass if provided
1893 Klass* k = NULL;
1894 if (klass != NULL) {
1895 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1896 if (k_mirror == NULL) {
1897 return JVMTI_ERROR_INVALID_CLASS;
1898 }
1899 if (java_lang_Class::is_primitive(k_mirror)) {
1900 return JVMTI_ERROR_NONE;
1901 }
1902 k = java_lang_Class::as_Klass(k_mirror);
1903 if (k == NULL) {
1904 return JVMTI_ERROR_INVALID_CLASS;
1905 }
1906 }
1907
1908 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1909 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1910 return JVMTI_ERROR_NONE;
1911 } /* end IterateThroughHeap */
1912
1913
1914 // tag_ptr - pre-checked for NULL
1915 jvmtiError
1916 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1917 oop o = JNIHandles::resolve_external_guard(object);
1918 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1919 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1920 return JVMTI_ERROR_NONE;
1921 } /* end GetTag */
1922
1923
1924 jvmtiError
1925 JvmtiEnv::SetTag(jobject object, jlong tag) {
1926 oop o = JNIHandles::resolve_external_guard(object);
1927 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1928 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1929 return JVMTI_ERROR_NONE;
1930 } /* end SetTag */
1931
1932
1933 // tag_count - pre-checked to be greater than or equal to 0
1934 // tags - pre-checked for NULL
1935 // count_ptr - pre-checked for NULL
1936 // object_result_ptr - NULL is a valid value, must be checked
1937 // tag_result_ptr - NULL is a valid value, must be checked
1938 jvmtiError
1939 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1940 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1941 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1942 } /* end GetObjectsWithTags */
1943
1944
1945 jvmtiError
1946 JvmtiEnv::ForceGarbageCollection() {
1947 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1948 return JVMTI_ERROR_NONE;
1949 } /* end ForceGarbageCollection */
1950
1951
1952 //
1953 // Heap (1.0) functions
1954 //
1955
1956 // object_reference_callback - pre-checked for NULL
1957 // user_data - NULL is a valid value, must be checked
1958 jvmtiError
1959 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1960 oop o = JNIHandles::resolve_external_guard(object);
1961 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1962 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1963 return JVMTI_ERROR_NONE;
1964 } /* end IterateOverObjectsReachableFromObject */
1965
1966
1967 // heap_root_callback - NULL is a valid value, must be checked
1968 // stack_ref_callback - NULL is a valid value, must be checked
1969 // object_ref_callback - NULL is a valid value, must be checked
1970 // user_data - NULL is a valid value, must be checked
1971 jvmtiError
1972 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1973 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1974 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1975 return JVMTI_ERROR_NONE;
1976 } /* end IterateOverReachableObjects */
1977
1978
1979 // heap_object_callback - pre-checked for NULL
1980 // user_data - NULL is a valid value, must be checked
1981 jvmtiError
1982 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1983 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1984 Thread *thread = Thread::current();
1985 HandleMark hm(thread);
1986 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
1987 return JVMTI_ERROR_NONE;
1988 } /* end IterateOverHeap */
1989
1990
1991 // k_mirror - may be primitive, this must be checked
1992 // heap_object_callback - pre-checked for NULL
1993 // user_data - NULL is a valid value, must be checked
1994 jvmtiError
1995 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1996 if (java_lang_Class::is_primitive(k_mirror)) {
1997 // DO PRIMITIVE CLASS PROCESSING
1998 return JVMTI_ERROR_NONE;
1999 }
2000 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2001 if (klass == NULL) {
2002 return JVMTI_ERROR_INVALID_CLASS;
2003 }
2004 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2005 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2006 return JVMTI_ERROR_NONE;
2007 } /* end IterateOverInstancesOfClass */
2008
2009 // Start the sampler.
2010 jvmtiError
2011 JvmtiEnv::StartHeapSampling(jint monitoring_rate, jint max_gc_storage) {
2012 if (monitoring_rate < 0) {
2013 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2014 }
2015
2016 HeapThreadTransition htt(Thread::current());
2017 HeapMonitoring::initialize_profiling(monitoring_rate, max_gc_storage);
2018 return JVMTI_ERROR_NONE;
2019 } /* end StartHeapSampling */
2020
2021 // Stop the sampler.
2022 jvmtiError
2023 JvmtiEnv::StopHeapSampling() {
2024 HeapThreadTransition htt(Thread::current());
2025 HeapMonitoring::stop_profiling();
2026 return JVMTI_ERROR_NONE;
2027 } /* end StopHeapSampling */
2028
2029 // Provoke a GC and get the currently live sampled allocations.
2030 jvmtiError
2031 JvmtiEnv::GetLiveTraces(jvmtiStackTraces* stack_traces) {
2032 ForceGarbageCollection();
2033 HeapThreadTransition htt(Thread::current());
2034 if (stack_traces == NULL) {
2035 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2036 }
2037
2038 HeapMonitoring::get_live_traces(stack_traces);
2039 return JVMTI_ERROR_NONE;
2040 } /* end GetLiveTraces */
2041
2042 // Get the recently garbage collected allocations.
2043 jvmtiError
2044 JvmtiEnv::GetGarbageTraces(jvmtiStackTraces* stack_traces) {
2045 HeapThreadTransition htt(Thread::current());
2046 if (stack_traces == NULL) {
2047 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2048 }
2049
2050 HeapMonitoring::get_garbage_traces(stack_traces);
2051 return JVMTI_ERROR_NONE;
2052 } /* end GetGarbageTraces */
2053
2054 // Get the frequently garbage collected traces.
2055 jvmtiError
2056 JvmtiEnv::GetFrequentGarbageTraces(jvmtiStackTraces* stack_traces) {
2057 HeapThreadTransition htt(Thread::current());
2058 if (stack_traces == NULL) {
2059 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2060 }
2061
2062 HeapMonitoring::get_frequent_garbage_traces(stack_traces);
2063 return JVMTI_ERROR_NONE;
2064 } /* end GetFrequentGarbageTraces */
2065
2066 // Get the traces that were garbage collected in the last full GC.
2067 jvmtiError
2068 JvmtiEnv::GetCachedTraces(jvmtiStackTraces* stack_traces) {
2069 HeapThreadTransition htt(Thread::current());
2070 if (stack_traces == NULL) {
2071 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2072 }
2073
2074 HeapMonitoring::get_cached_traces(stack_traces);
2075 return JVMTI_ERROR_NONE;
2076 } /* end GetCachedTraces */
2077
2078 // Release sampled traces.
2079 jvmtiError
2080 JvmtiEnv::ReleaseTraces(jvmtiStackTraces* stack_traces) {
2081 if (stack_traces == NULL) {
2082 return JVMTI_ERROR_NONE;
2083 }
2084 HeapMonitoring::release_traces(stack_traces);
2085 return JVMTI_ERROR_NONE;
2086 } /* end ReleaseTraces */
2087
2088 // Get the heap sampling statistics.
2089 jvmtiError
2090 JvmtiEnv::GetHeapSamplingStats(jvmtiHeapSamplingStats* stats) {
2091 if (stats == NULL) {
2092 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2093 }
2094 HeapMonitoring::get_sampling_statistics(stats);
2095 return JVMTI_ERROR_NONE;
2096 } /* end GetHeapSamplingStats */
2097
2098 //
2099 // Local Variable functions
2100 //
2101
2102 // Threads_lock NOT held, java_thread not protected by lock
2103 // java_thread - pre-checked
2104 // java_thread - unchecked
2105 // depth - pre-checked as non-negative
2106 // value_ptr - pre-checked for NULL
2107 jvmtiError
2108 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2109 JavaThread* current_thread = JavaThread::current();
2110 // rm object is created to clean up the javaVFrame created in
2111 // doit_prologue(), but after doit() is finished with it.
2112 ResourceMark rm(current_thread);
2113
2114 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2115 VMThread::execute(&op);
2116 jvmtiError err = op.result();
2117 if (err != JVMTI_ERROR_NONE) {
2118 return err;
2119 } else {
2120 *value_ptr = op.value().l;
2121 return JVMTI_ERROR_NONE;
2122 }
2123 } /* end GetLocalObject */
2124
2125 // Threads_lock NOT held, java_thread not protected by lock
2126 // java_thread - pre-checked
2127 // java_thread - unchecked
2128 // depth - pre-checked as non-negative
2129 // value - pre-checked for NULL
2130 jvmtiError
2131 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2132 JavaThread* current_thread = JavaThread::current();
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(current_thread);
2136
2137 VM_GetReceiver op(java_thread, current_thread, depth);
2138 VMThread::execute(&op);
2139 jvmtiError err = op.result();
2140 if (err != JVMTI_ERROR_NONE) {
2141 return err;
2142 } else {
2143 *value_ptr = op.value().l;
2144 return JVMTI_ERROR_NONE;
2145 }
2146 } /* end GetLocalInstance */
2147
2148
2149 // Threads_lock NOT held, java_thread not protected by lock
2150 // java_thread - pre-checked
2151 // java_thread - unchecked
2152 // depth - pre-checked as non-negative
2153 // value_ptr - pre-checked for NULL
2154 jvmtiError
2155 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2156 // rm object is created to clean up the javaVFrame created in
2157 // doit_prologue(), but after doit() is finished with it.
2158 ResourceMark rm;
2159
2160 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2161 VMThread::execute(&op);
2162 *value_ptr = op.value().i;
2163 return op.result();
2164 } /* end GetLocalInt */
2165
2166
2167 // Threads_lock NOT held, java_thread not protected by lock
2168 // java_thread - pre-checked
2169 // java_thread - unchecked
2170 // depth - pre-checked as non-negative
2171 // value_ptr - pre-checked for NULL
2172 jvmtiError
2173 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2174 // rm object is created to clean up the javaVFrame created in
2175 // doit_prologue(), but after doit() is finished with it.
2176 ResourceMark rm;
2177
2178 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2179 VMThread::execute(&op);
2180 *value_ptr = op.value().j;
2181 return op.result();
2182 } /* end GetLocalLong */
2183
2184
2185 // Threads_lock NOT held, java_thread not protected by lock
2186 // java_thread - pre-checked
2187 // java_thread - unchecked
2188 // depth - pre-checked as non-negative
2189 // value_ptr - pre-checked for NULL
2190 jvmtiError
2191 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2192 // rm object is created to clean up the javaVFrame created in
2193 // doit_prologue(), but after doit() is finished with it.
2194 ResourceMark rm;
2195
2196 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2197 VMThread::execute(&op);
2198 *value_ptr = op.value().f;
2199 return op.result();
2200 } /* end GetLocalFloat */
2201
2202
2203 // Threads_lock NOT held, java_thread not protected by lock
2204 // java_thread - pre-checked
2205 // java_thread - unchecked
2206 // depth - pre-checked as non-negative
2207 // value_ptr - pre-checked for NULL
2208 jvmtiError
2209 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2210 // rm object is created to clean up the javaVFrame created in
2211 // doit_prologue(), but after doit() is finished with it.
2212 ResourceMark rm;
2213
2214 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2215 VMThread::execute(&op);
2216 *value_ptr = op.value().d;
2217 return op.result();
2218 } /* end GetLocalDouble */
2219
2220
2221 // Threads_lock NOT held, java_thread not protected by lock
2222 // java_thread - pre-checked
2223 // java_thread - unchecked
2224 // depth - pre-checked as non-negative
2225 jvmtiError
2226 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2227 // rm object is created to clean up the javaVFrame created in
2228 // doit_prologue(), but after doit() is finished with it.
2229 ResourceMark rm;
2230 jvalue val;
2231 val.l = value;
2232 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2233 VMThread::execute(&op);
2234 return op.result();
2235 } /* end SetLocalObject */
2236
2237
2238 // Threads_lock NOT held, java_thread not protected by lock
2239 // java_thread - pre-checked
2240 // java_thread - unchecked
2241 // depth - pre-checked as non-negative
2242 jvmtiError
2243 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2244 // rm object is created to clean up the javaVFrame created in
2245 // doit_prologue(), but after doit() is finished with it.
2246 ResourceMark rm;
2247 jvalue val;
2248 val.i = value;
2249 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2250 VMThread::execute(&op);
2251 return op.result();
2252 } /* end SetLocalInt */
2253
2254
2255 // Threads_lock NOT held, java_thread not protected by lock
2256 // java_thread - pre-checked
2257 // java_thread - unchecked
2258 // depth - pre-checked as non-negative
2259 jvmtiError
2260 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2261 // rm object is created to clean up the javaVFrame created in
2262 // doit_prologue(), but after doit() is finished with it.
2263 ResourceMark rm;
2264 jvalue val;
2265 val.j = value;
2266 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2267 VMThread::execute(&op);
2268 return op.result();
2269 } /* end SetLocalLong */
2270
2271
2272 // Threads_lock NOT held, java_thread not protected by lock
2273 // java_thread - pre-checked
2274 // java_thread - unchecked
2275 // depth - pre-checked as non-negative
2276 jvmtiError
2277 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2278 // rm object is created to clean up the javaVFrame created in
2279 // doit_prologue(), but after doit() is finished with it.
2280 ResourceMark rm;
2281 jvalue val;
2282 val.f = value;
2283 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2284 VMThread::execute(&op);
2285 return op.result();
2286 } /* end SetLocalFloat */
2287
2288
2289 // Threads_lock NOT held, java_thread not protected by lock
2290 // java_thread - pre-checked
2291 // java_thread - unchecked
2292 // depth - pre-checked as non-negative
2293 jvmtiError
2294 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2295 // rm object is created to clean up the javaVFrame created in
2296 // doit_prologue(), but after doit() is finished with it.
2297 ResourceMark rm;
2298 jvalue val;
2299 val.d = value;
2300 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2301 VMThread::execute(&op);
2302 return op.result();
2303 } /* end SetLocalDouble */
2304
2305
2306 //
2307 // Breakpoint functions
2308 //
2309
2310 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2311 jvmtiError
2312 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2313 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2314 if (location < 0) { // simple invalid location check first
2315 return JVMTI_ERROR_INVALID_LOCATION;
2316 }
2317 // verify that the breakpoint is not past the end of the method
2318 if (location >= (jlocation) method_oop->code_size()) {
2319 return JVMTI_ERROR_INVALID_LOCATION;
2320 }
2321
2322 ResourceMark rm;
2323 JvmtiBreakpoint bp(method_oop, location);
2324 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2325 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2326 return JVMTI_ERROR_DUPLICATE;
2327
2328 if (TraceJVMTICalls) {
2329 jvmti_breakpoints.print();
2330 }
2331
2332 return JVMTI_ERROR_NONE;
2333 } /* end SetBreakpoint */
2334
2335
2336 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2337 jvmtiError
2338 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2339 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2340
2341 if (location < 0) { // simple invalid location check first
2342 return JVMTI_ERROR_INVALID_LOCATION;
2343 }
2344
2345 // verify that the breakpoint is not past the end of the method
2346 if (location >= (jlocation) method_oop->code_size()) {
2347 return JVMTI_ERROR_INVALID_LOCATION;
2348 }
2349
2350 JvmtiBreakpoint bp(method_oop, location);
2351
2352 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2353 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2354 return JVMTI_ERROR_NOT_FOUND;
2355
2356 if (TraceJVMTICalls) {
2357 jvmti_breakpoints.print();
2358 }
2359
2360 return JVMTI_ERROR_NONE;
2361 } /* end ClearBreakpoint */
2362
2363
2364 //
2365 // Watched Field functions
2366 //
2367
2368 jvmtiError
2369 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2370 // make sure we haven't set this watch before
2371 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2372 fdesc_ptr->set_is_field_access_watched(true);
2373
2374 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2375
2376 return JVMTI_ERROR_NONE;
2377 } /* end SetFieldAccessWatch */
2378
2379
2380 jvmtiError
2381 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2382 // make sure we have a watch to clear
2383 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2384 fdesc_ptr->set_is_field_access_watched(false);
2385
2386 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2387
2388 return JVMTI_ERROR_NONE;
2389 } /* end ClearFieldAccessWatch */
2390
2391
2392 jvmtiError
2393 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2394 // make sure we haven't set this watch before
2395 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2396 fdesc_ptr->set_is_field_modification_watched(true);
2397
2398 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2399
2400 return JVMTI_ERROR_NONE;
2401 } /* end SetFieldModificationWatch */
2402
2403
2404 jvmtiError
2405 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2406 // make sure we have a watch to clear
2407 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2408 fdesc_ptr->set_is_field_modification_watched(false);
2409
2410 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2411
2412 return JVMTI_ERROR_NONE;
2413 } /* end ClearFieldModificationWatch */
2414
2415 //
2416 // Class functions
2417 //
2418
2419
2420 // k_mirror - may be primitive, this must be checked
2421 // signature_ptr - NULL is a valid value, must be checked
2422 // generic_ptr - NULL is a valid value, must be checked
2423 jvmtiError
2424 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2425 ResourceMark rm;
2426 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2427 Klass* k = NULL;
2428 if (!isPrimitive) {
2429 k = java_lang_Class::as_Klass(k_mirror);
2430 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2431 }
2432 if (signature_ptr != NULL) {
2433 char* result = NULL;
2434 if (isPrimitive) {
2435 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2436 result = (char*) jvmtiMalloc(2);
2437 result[0] = tchar;
2438 result[1] = '\0';
2439 } else {
2440 const char* class_sig = k->signature_name();
2441 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2442 strcpy(result, class_sig);
2443 }
2444 *signature_ptr = result;
2445 }
2446 if (generic_ptr != NULL) {
2447 *generic_ptr = NULL;
2448 if (!isPrimitive && k->is_instance_klass()) {
2449 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2450 if (soo != NULL) {
2451 const char *gen_sig = soo->as_C_string();
2452 if (gen_sig != NULL) {
2453 char* gen_result;
2454 jvmtiError err = allocate(strlen(gen_sig) + 1,
2455 (unsigned char **)&gen_result);
2456 if (err != JVMTI_ERROR_NONE) {
2457 return err;
2458 }
2459 strcpy(gen_result, gen_sig);
2460 *generic_ptr = gen_result;
2461 }
2462 }
2463 }
2464 }
2465 return JVMTI_ERROR_NONE;
2466 } /* end GetClassSignature */
2467
2468
2469 // k_mirror - may be primitive, this must be checked
2470 // status_ptr - pre-checked for NULL
2471 jvmtiError
2472 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2473 jint result = 0;
2474 if (java_lang_Class::is_primitive(k_mirror)) {
2475 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2476 } else {
2477 Klass* k = java_lang_Class::as_Klass(k_mirror);
2478 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2479 result = k->jvmti_class_status();
2480 }
2481 *status_ptr = result;
2482
2483 return JVMTI_ERROR_NONE;
2484 } /* end GetClassStatus */
2485
2486
2487 // k_mirror - may be primitive, this must be checked
2488 // source_name_ptr - pre-checked for NULL
2489 jvmtiError
2490 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2491 if (java_lang_Class::is_primitive(k_mirror)) {
2492 return JVMTI_ERROR_ABSENT_INFORMATION;
2493 }
2494 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2495 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2496
2497 if (!k_klass->is_instance_klass()) {
2498 return JVMTI_ERROR_ABSENT_INFORMATION;
2499 }
2500
2501 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2502 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2503 {
2504 JavaThread* current_thread = JavaThread::current();
2505 ResourceMark rm(current_thread);
2506 const char* sfncp = (const char*) sfnOop->as_C_string();
2507 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2508 strcpy(*source_name_ptr, sfncp);
2509 }
2510
2511 return JVMTI_ERROR_NONE;
2512 } /* end GetSourceFileName */
2513
2514
2515 // k_mirror - may be primitive, this must be checked
2516 // modifiers_ptr - pre-checked for NULL
2517 jvmtiError
2518 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2519 JavaThread* current_thread = JavaThread::current();
2520 jint result = 0;
2521 if (!java_lang_Class::is_primitive(k_mirror)) {
2522 Klass* k = java_lang_Class::as_Klass(k_mirror);
2523 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2524 result = k->compute_modifier_flags(current_thread);
2525 JavaThread* THREAD = current_thread; // pass to macros
2526 if (HAS_PENDING_EXCEPTION) {
2527 CLEAR_PENDING_EXCEPTION;
2528 return JVMTI_ERROR_INTERNAL;
2529 };
2530
2531 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2532 if(k->is_super()) {
2533 result |= JVM_ACC_SUPER;
2534 }
2535 } else {
2536 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2537 }
2538 *modifiers_ptr = result;
2539
2540 return JVMTI_ERROR_NONE;
2541 } /* end GetClassModifiers */
2542
2543
2544 // k_mirror - may be primitive, this must be checked
2545 // method_count_ptr - pre-checked for NULL
2546 // methods_ptr - pre-checked for NULL
2547 jvmtiError
2548 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2549 JavaThread* current_thread = JavaThread::current();
2550 HandleMark hm(current_thread);
2551
2552 if (java_lang_Class::is_primitive(k_mirror)) {
2553 *method_count_ptr = 0;
2554 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2555 return JVMTI_ERROR_NONE;
2556 }
2557 Klass* k = java_lang_Class::as_Klass(k_mirror);
2558 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2559
2560 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2561 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2562 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2563 }
2564
2565 if (!k->is_instance_klass()) {
2566 *method_count_ptr = 0;
2567 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2568 return JVMTI_ERROR_NONE;
2569 }
2570 InstanceKlass* ik = InstanceKlass::cast(k);
2571 // Allocate the result and fill it in
2572 int result_length = ik->methods()->length();
2573 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2574 int index;
2575 bool jmethodids_found = true;
2576
2577 if (JvmtiExport::can_maintain_original_method_order()) {
2578 // Use the original method ordering indices stored in the class, so we can emit
2579 // jmethodIDs in the order they appeared in the class file
2580 for (index = 0; index < result_length; index++) {
2581 Method* m = ik->methods()->at(index);
2582 int original_index = ik->method_ordering()->at(index);
2583 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2584 jmethodID id;
2585 if (jmethodids_found) {
2586 id = m->find_jmethod_id_or_null();
2587 if (id == NULL) {
2588 // If we find an uninitialized value, make sure there is
2589 // enough space for all the uninitialized values we might
2590 // find.
2591 ik->ensure_space_for_methodids(index);
2592 jmethodids_found = false;
2593 id = m->jmethod_id();
2594 }
2595 } else {
2596 id = m->jmethod_id();
2597 }
2598 result_list[original_index] = id;
2599 }
2600 } else {
2601 // otherwise just copy in any order
2602 for (index = 0; index < result_length; index++) {
2603 Method* m = ik->methods()->at(index);
2604 jmethodID id;
2605 if (jmethodids_found) {
2606 id = m->find_jmethod_id_or_null();
2607 if (id == NULL) {
2608 // If we find an uninitialized value, make sure there is
2609 // enough space for all the uninitialized values we might
2610 // find.
2611 ik->ensure_space_for_methodids(index);
2612 jmethodids_found = false;
2613 id = m->jmethod_id();
2614 }
2615 } else {
2616 id = m->jmethod_id();
2617 }
2618 result_list[index] = id;
2619 }
2620 }
2621 // Fill in return value.
2622 *method_count_ptr = result_length;
2623 *methods_ptr = result_list;
2624
2625 return JVMTI_ERROR_NONE;
2626 } /* end GetClassMethods */
2627
2628
2629 // k_mirror - may be primitive, this must be checked
2630 // field_count_ptr - pre-checked for NULL
2631 // fields_ptr - pre-checked for NULL
2632 jvmtiError
2633 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2634 if (java_lang_Class::is_primitive(k_mirror)) {
2635 *field_count_ptr = 0;
2636 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2637 return JVMTI_ERROR_NONE;
2638 }
2639 JavaThread* current_thread = JavaThread::current();
2640 HandleMark hm(current_thread);
2641 Klass* k = java_lang_Class::as_Klass(k_mirror);
2642 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2643
2644 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2645 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2646 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2647 }
2648
2649 if (!k->is_instance_klass()) {
2650 *field_count_ptr = 0;
2651 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2652 return JVMTI_ERROR_NONE;
2653 }
2654
2655
2656 InstanceKlass* ik = InstanceKlass::cast(k);
2657
2658 int result_count = 0;
2659 // First, count the fields.
2660 FilteredFieldStream flds(ik, true, true);
2661 result_count = flds.field_count();
2662
2663 // Allocate the result and fill it in
2664 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2665 // The JVMTI spec requires fields in the order they occur in the class file,
2666 // this is the reverse order of what FieldStream hands out.
2667 int id_index = (result_count - 1);
2668
2669 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2670 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2671 ik, src_st.offset(),
2672 src_st.access_flags().is_static());
2673 }
2674 assert(id_index == -1, "just checking");
2675 // Fill in the results
2676 *field_count_ptr = result_count;
2677 *fields_ptr = result_list;
2678
2679 return JVMTI_ERROR_NONE;
2680 } /* end GetClassFields */
2681
2682
2683 // k_mirror - may be primitive, this must be checked
2684 // interface_count_ptr - pre-checked for NULL
2685 // interfaces_ptr - pre-checked for NULL
2686 jvmtiError
2687 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2688 {
2689 if (java_lang_Class::is_primitive(k_mirror)) {
2690 *interface_count_ptr = 0;
2691 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2692 return JVMTI_ERROR_NONE;
2693 }
2694 JavaThread* current_thread = JavaThread::current();
2695 HandleMark hm(current_thread);
2696 Klass* k = java_lang_Class::as_Klass(k_mirror);
2697 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2698
2699 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2700 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2701 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2702
2703 if (!k->is_instance_klass()) {
2704 *interface_count_ptr = 0;
2705 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2706 return JVMTI_ERROR_NONE;
2707 }
2708
2709 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2710 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2711 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2712 for (int i_index = 0; i_index < result_length; i_index += 1) {
2713 Klass* klass_at = interface_list->at(i_index);
2714 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2715 assert(klass_at->is_interface(), "interfaces must be interfaces");
2716 oop mirror_at = klass_at->java_mirror();
2717 Handle handle_at = Handle(current_thread, mirror_at);
2718 result_list[i_index] = (jclass) jni_reference(handle_at);
2719 }
2720 *interface_count_ptr = result_length;
2721 *interfaces_ptr = result_list;
2722 }
2723
2724 return JVMTI_ERROR_NONE;
2725 } /* end GetImplementedInterfaces */
2726
2727
2728 // k_mirror - may be primitive, this must be checked
2729 // minor_version_ptr - pre-checked for NULL
2730 // major_version_ptr - pre-checked for NULL
2731 jvmtiError
2732 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2733 if (java_lang_Class::is_primitive(k_mirror)) {
2734 return JVMTI_ERROR_ABSENT_INFORMATION;
2735 }
2736 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2737
2738 jint status = klass->jvmti_class_status();
2739 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2740 return JVMTI_ERROR_INVALID_CLASS;
2741 }
2742 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2743 return JVMTI_ERROR_ABSENT_INFORMATION;
2744 }
2745
2746 InstanceKlass* ik = InstanceKlass::cast(klass);
2747 *minor_version_ptr = ik->minor_version();
2748 *major_version_ptr = ik->major_version();
2749
2750 return JVMTI_ERROR_NONE;
2751 } /* end GetClassVersionNumbers */
2752
2753
2754 // k_mirror - may be primitive, this must be checked
2755 // constant_pool_count_ptr - pre-checked for NULL
2756 // constant_pool_byte_count_ptr - pre-checked for NULL
2757 // constant_pool_bytes_ptr - pre-checked for NULL
2758 jvmtiError
2759 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2760 if (java_lang_Class::is_primitive(k_mirror)) {
2761 return JVMTI_ERROR_ABSENT_INFORMATION;
2762 }
2763
2764 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2765 Thread *thread = Thread::current();
2766 ResourceMark rm(thread);
2767
2768 jint status = klass->jvmti_class_status();
2769 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2770 return JVMTI_ERROR_INVALID_CLASS;
2771 }
2772 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2773 return JVMTI_ERROR_ABSENT_INFORMATION;
2774 }
2775
2776 InstanceKlass* ik = InstanceKlass::cast(klass);
2777 JvmtiConstantPoolReconstituter reconstituter(ik);
2778 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2779 return reconstituter.get_error();
2780 }
2781
2782 unsigned char *cpool_bytes;
2783 int cpool_size = reconstituter.cpool_size();
2784 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2785 return reconstituter.get_error();
2786 }
2787 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2788 if (res != JVMTI_ERROR_NONE) {
2789 return res;
2790 }
2791 reconstituter.copy_cpool_bytes(cpool_bytes);
2792 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2793 return reconstituter.get_error();
2794 }
2795
2796 constantPoolHandle constants(thread, ik->constants());
2797 *constant_pool_count_ptr = constants->length();
2798 *constant_pool_byte_count_ptr = cpool_size;
2799 *constant_pool_bytes_ptr = cpool_bytes;
2800
2801 return JVMTI_ERROR_NONE;
2802 } /* end GetConstantPool */
2803
2804
2805 // k_mirror - may be primitive, this must be checked
2806 // is_interface_ptr - pre-checked for NULL
2807 jvmtiError
2808 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2809 {
2810 bool result = false;
2811 if (!java_lang_Class::is_primitive(k_mirror)) {
2812 Klass* k = java_lang_Class::as_Klass(k_mirror);
2813 if (k != NULL && k->is_interface()) {
2814 result = true;
2815 }
2816 }
2817 *is_interface_ptr = result;
2818 }
2819
2820 return JVMTI_ERROR_NONE;
2821 } /* end IsInterface */
2822
2823
2824 // k_mirror - may be primitive, this must be checked
2825 // is_array_class_ptr - pre-checked for NULL
2826 jvmtiError
2827 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2828 {
2829 bool result = false;
2830 if (!java_lang_Class::is_primitive(k_mirror)) {
2831 Klass* k = java_lang_Class::as_Klass(k_mirror);
2832 if (k != NULL && k->is_array_klass()) {
2833 result = true;
2834 }
2835 }
2836 *is_array_class_ptr = result;
2837 }
2838
2839 return JVMTI_ERROR_NONE;
2840 } /* end IsArrayClass */
2841
2842
2843 // k_mirror - may be primitive, this must be checked
2844 // classloader_ptr - pre-checked for NULL
2845 jvmtiError
2846 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2847 {
2848 if (java_lang_Class::is_primitive(k_mirror)) {
2849 *classloader_ptr = (jclass) jni_reference(Handle());
2850 return JVMTI_ERROR_NONE;
2851 }
2852 JavaThread* current_thread = JavaThread::current();
2853 HandleMark hm(current_thread);
2854 Klass* k = java_lang_Class::as_Klass(k_mirror);
2855 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2856
2857 oop result_oop = k->class_loader();
2858 if (result_oop == NULL) {
2859 *classloader_ptr = (jclass) jni_reference(Handle());
2860 return JVMTI_ERROR_NONE;
2861 }
2862 Handle result_handle = Handle(current_thread, result_oop);
2863 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2864 *classloader_ptr = result_jnihandle;
2865 }
2866 return JVMTI_ERROR_NONE;
2867 } /* end GetClassLoader */
2868
2869
2870 // k_mirror - may be primitive, this must be checked
2871 // source_debug_extension_ptr - pre-checked for NULL
2872 jvmtiError
2873 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2874 {
2875 if (java_lang_Class::is_primitive(k_mirror)) {
2876 return JVMTI_ERROR_ABSENT_INFORMATION;
2877 }
2878 Klass* k = java_lang_Class::as_Klass(k_mirror);
2879 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2880 if (!k->is_instance_klass()) {
2881 return JVMTI_ERROR_ABSENT_INFORMATION;
2882 }
2883 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2884 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2885
2886 {
2887 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2888 strcpy(*source_debug_extension_ptr, sde);
2889 }
2890 }
2891
2892 return JVMTI_ERROR_NONE;
2893 } /* end GetSourceDebugExtension */
2894
2895 //
2896 // Object functions
2897 //
2898
2899 // hash_code_ptr - pre-checked for NULL
2900 jvmtiError
2901 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2902 oop mirror = JNIHandles::resolve_external_guard(object);
2903 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2904 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2905
2906 {
2907 jint result = (jint) mirror->identity_hash();
2908 *hash_code_ptr = result;
2909 }
2910 return JVMTI_ERROR_NONE;
2911 } /* end GetObjectHashCode */
2912
2913
2914 // info_ptr - pre-checked for NULL
2915 jvmtiError
2916 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2917 JavaThread* calling_thread = JavaThread::current();
2918 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2919 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2920 // Some of the critical threads were not suspended. go to a safepoint and try again
2921 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2922 VMThread::execute(&op);
2923 err = op.result();
2924 }
2925 return err;
2926 } /* end GetObjectMonitorUsage */
2927
2928
2929 //
2930 // Field functions
2931 //
2932
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::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2938 JavaThread* current_thread = JavaThread::current();
2939 ResourceMark rm(current_thread);
2940 if (name_ptr == NULL) {
2941 // just don't return the name
2942 } else {
2943 const char* fieldName = fdesc_ptr->name()->as_C_string();
2944 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2945 if (*name_ptr == NULL)
2946 return JVMTI_ERROR_OUT_OF_MEMORY;
2947 strcpy(*name_ptr, fieldName);
2948 }
2949 if (signature_ptr== NULL) {
2950 // just don't return the signature
2951 } else {
2952 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2953 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2954 if (*signature_ptr == NULL)
2955 return JVMTI_ERROR_OUT_OF_MEMORY;
2956 strcpy(*signature_ptr, fieldSignature);
2957 }
2958 if (generic_ptr != NULL) {
2959 *generic_ptr = NULL;
2960 Symbol* soop = fdesc_ptr->generic_signature();
2961 if (soop != NULL) {
2962 const char* gen_sig = soop->as_C_string();
2963 if (gen_sig != NULL) {
2964 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2965 if (err != JVMTI_ERROR_NONE) {
2966 return err;
2967 }
2968 strcpy(*generic_ptr, gen_sig);
2969 }
2970 }
2971 }
2972 return JVMTI_ERROR_NONE;
2973 } /* end GetFieldName */
2974
2975
2976 // declaring_class_ptr - pre-checked for NULL
2977 jvmtiError
2978 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2979
2980 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2981 return JVMTI_ERROR_NONE;
2982 } /* end GetFieldDeclaringClass */
2983
2984
2985 // modifiers_ptr - pre-checked for NULL
2986 jvmtiError
2987 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2988
2989 AccessFlags resultFlags = fdesc_ptr->access_flags();
2990 jint result = resultFlags.as_int();
2991 *modifiers_ptr = result;
2992
2993 return JVMTI_ERROR_NONE;
2994 } /* end GetFieldModifiers */
2995
2996
2997 // is_synthetic_ptr - pre-checked for NULL
2998 jvmtiError
2999 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
3000 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
3001 return JVMTI_ERROR_NONE;
3002 } /* end IsFieldSynthetic */
3003
3004
3005 //
3006 // Method functions
3007 //
3008
3009 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3010 // name_ptr - NULL is a valid value, must be checked
3011 // signature_ptr - NULL is a valid value, must be checked
3012 // generic_ptr - NULL is a valid value, must be checked
3013 jvmtiError
3014 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
3015 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3016 JavaThread* current_thread = JavaThread::current();
3017
3018 ResourceMark rm(current_thread); // get the utf8 name and signature
3019 if (name_ptr == NULL) {
3020 // just don't return the name
3021 } else {
3022 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
3023 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3024 strcpy(*name_ptr, utf8_name);
3025 }
3026 if (signature_ptr == NULL) {
3027 // just don't return the signature
3028 } else {
3029 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
3030 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
3031 strcpy(*signature_ptr, utf8_signature);
3032 }
3033
3034 if (generic_ptr != NULL) {
3035 *generic_ptr = NULL;
3036 Symbol* soop = method_oop->generic_signature();
3037 if (soop != NULL) {
3038 const char* gen_sig = soop->as_C_string();
3039 if (gen_sig != NULL) {
3040 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
3041 if (err != JVMTI_ERROR_NONE) {
3042 return err;
3043 }
3044 strcpy(*generic_ptr, gen_sig);
3045 }
3046 }
3047 }
3048 return JVMTI_ERROR_NONE;
3049 } /* end GetMethodName */
3050
3051
3052 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3053 // declaring_class_ptr - pre-checked for NULL
3054 jvmtiError
3055 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
3056 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3057 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
3058 return JVMTI_ERROR_NONE;
3059 } /* end GetMethodDeclaringClass */
3060
3061
3062 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3063 // modifiers_ptr - pre-checked for NULL
3064 jvmtiError
3065 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
3066 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3067 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
3068 return JVMTI_ERROR_NONE;
3069 } /* end GetMethodModifiers */
3070
3071
3072 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3073 // max_ptr - pre-checked for NULL
3074 jvmtiError
3075 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
3076 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3077 // get max stack
3078 (*max_ptr) = method_oop->max_locals();
3079 return JVMTI_ERROR_NONE;
3080 } /* end GetMaxLocals */
3081
3082
3083 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3084 // size_ptr - pre-checked for NULL
3085 jvmtiError
3086 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3087 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3088 // get size of arguments
3089
3090 (*size_ptr) = method_oop->size_of_parameters();
3091 return JVMTI_ERROR_NONE;
3092 } /* end GetArgumentsSize */
3093
3094
3095 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3096 // entry_count_ptr - pre-checked for NULL
3097 // table_ptr - pre-checked for NULL
3098 jvmtiError
3099 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3100 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3101 if (!method_oop->has_linenumber_table()) {
3102 return (JVMTI_ERROR_ABSENT_INFORMATION);
3103 }
3104
3105 // The line number table is compressed so we don't know how big it is until decompressed.
3106 // Decompression is really fast so we just do it twice.
3107
3108 // Compute size of table
3109 jint num_entries = 0;
3110 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3111 while (stream.read_pair()) {
3112 num_entries++;
3113 }
3114 jvmtiLineNumberEntry *jvmti_table =
3115 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3116
3117 // Fill jvmti table
3118 if (num_entries > 0) {
3119 int index = 0;
3120 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3121 while (stream.read_pair()) {
3122 jvmti_table[index].start_location = (jlocation) stream.bci();
3123 jvmti_table[index].line_number = (jint) stream.line();
3124 index++;
3125 }
3126 assert(index == num_entries, "sanity check");
3127 }
3128
3129 // Set up results
3130 (*entry_count_ptr) = num_entries;
3131 (*table_ptr) = jvmti_table;
3132
3133 return JVMTI_ERROR_NONE;
3134 } /* end GetLineNumberTable */
3135
3136
3137 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3138 // start_location_ptr - pre-checked for NULL
3139 // end_location_ptr - pre-checked for NULL
3140 jvmtiError
3141 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3142
3143 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3144 // get start and end location
3145 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3146 if (method_oop->code_size() == 0) {
3147 // there is no code so there is no start location
3148 (*start_location_ptr) = (jlocation)(-1);
3149 } else {
3150 (*start_location_ptr) = (jlocation)(0);
3151 }
3152
3153 return JVMTI_ERROR_NONE;
3154 } /* end GetMethodLocation */
3155
3156
3157 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3158 // entry_count_ptr - pre-checked for NULL
3159 // table_ptr - pre-checked for NULL
3160 jvmtiError
3161 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3162
3163 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3164 JavaThread* current_thread = JavaThread::current();
3165
3166 // does the klass have any local variable information?
3167 InstanceKlass* ik = method_oop->method_holder();
3168 if (!ik->access_flags().has_localvariable_table()) {
3169 return (JVMTI_ERROR_ABSENT_INFORMATION);
3170 }
3171
3172 ConstantPool* constants = method_oop->constants();
3173 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3174
3175 // in the vm localvariable table representation, 6 consecutive elements in the table
3176 // represent a 6-tuple of shorts
3177 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3178 jint num_entries = method_oop->localvariable_table_length();
3179 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3180 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3181
3182 if (num_entries > 0) {
3183 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3184 for (int i = 0; i < num_entries; i++) {
3185 // get the 5 tuple information from the vm table
3186 jlocation start_location = (jlocation) table[i].start_bci;
3187 jint length = (jint) table[i].length;
3188 int name_index = (int) table[i].name_cp_index;
3189 int signature_index = (int) table[i].descriptor_cp_index;
3190 int generic_signature_index = (int) table[i].signature_cp_index;
3191 jint slot = (jint) table[i].slot;
3192
3193 // get utf8 name and signature
3194 char *name_buf = NULL;
3195 char *sig_buf = NULL;
3196 char *gen_sig_buf = NULL;
3197 {
3198 ResourceMark rm(current_thread);
3199
3200 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3201 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3202 strcpy(name_buf, utf8_name);
3203
3204 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3205 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3206 strcpy(sig_buf, utf8_signature);
3207
3208 if (generic_signature_index > 0) {
3209 const char *utf8_gen_sign = (const char *)
3210 constants->symbol_at(generic_signature_index)->as_utf8();
3211 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3212 strcpy(gen_sig_buf, utf8_gen_sign);
3213 }
3214 }
3215
3216 // fill in the jvmti local variable table
3217 jvmti_table[i].start_location = start_location;
3218 jvmti_table[i].length = length;
3219 jvmti_table[i].name = name_buf;
3220 jvmti_table[i].signature = sig_buf;
3221 jvmti_table[i].generic_signature = gen_sig_buf;
3222 jvmti_table[i].slot = slot;
3223 }
3224 }
3225
3226 // set results
3227 (*entry_count_ptr) = num_entries;
3228 (*table_ptr) = jvmti_table;
3229
3230 return JVMTI_ERROR_NONE;
3231 } /* end GetLocalVariableTable */
3232
3233
3234 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3235 // bytecode_count_ptr - pre-checked for NULL
3236 // bytecodes_ptr - pre-checked for NULL
3237 jvmtiError
3238 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3239 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3240
3241 HandleMark hm;
3242 methodHandle method(method_oop);
3243 jint size = (jint)method->code_size();
3244 jvmtiError err = allocate(size, bytecodes_ptr);
3245 if (err != JVMTI_ERROR_NONE) {
3246 return err;
3247 }
3248
3249 (*bytecode_count_ptr) = size;
3250 // get byte codes
3251 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3252
3253 return JVMTI_ERROR_NONE;
3254 } /* end GetBytecodes */
3255
3256
3257 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3258 // is_native_ptr - pre-checked for NULL
3259 jvmtiError
3260 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3261 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3262 (*is_native_ptr) = method_oop->is_native();
3263 return JVMTI_ERROR_NONE;
3264 } /* end IsMethodNative */
3265
3266
3267 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3268 // is_synthetic_ptr - pre-checked for NULL
3269 jvmtiError
3270 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3271 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3272 (*is_synthetic_ptr) = method_oop->is_synthetic();
3273 return JVMTI_ERROR_NONE;
3274 } /* end IsMethodSynthetic */
3275
3276
3277 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3278 // is_obsolete_ptr - pre-checked for NULL
3279 jvmtiError
3280 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3281 if (use_version_1_0_semantics() &&
3282 get_capabilities()->can_redefine_classes == 0) {
3283 // This JvmtiEnv requested version 1.0 semantics and this function
3284 // requires the can_redefine_classes capability in version 1.0 so
3285 // we need to return an error here.
3286 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3287 }
3288
3289 if (method_oop == NULL || method_oop->is_obsolete()) {
3290 *is_obsolete_ptr = true;
3291 } else {
3292 *is_obsolete_ptr = false;
3293 }
3294 return JVMTI_ERROR_NONE;
3295 } /* end IsMethodObsolete */
3296
3297 //
3298 // Raw Monitor functions
3299 //
3300
3301 // name - pre-checked for NULL
3302 // monitor_ptr - pre-checked for NULL
3303 jvmtiError
3304 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3305 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3306 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3307
3308 *monitor_ptr = (jrawMonitorID)rmonitor;
3309
3310 return JVMTI_ERROR_NONE;
3311 } /* end CreateRawMonitor */
3312
3313
3314 // rmonitor - pre-checked for validity
3315 jvmtiError
3316 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3317 if (Threads::number_of_threads() == 0) {
3318 // Remove this monitor from pending raw monitors list
3319 // if it has entered in onload or start phase.
3320 JvmtiPendingMonitors::destroy(rmonitor);
3321 } else {
3322 Thread* thread = Thread::current();
3323 if (rmonitor->is_entered(thread)) {
3324 // The caller owns this monitor which we are about to destroy.
3325 // We exit the underlying synchronization object so that the
3326 // "delete monitor" call below can work without an assertion
3327 // failure on systems that don't like destroying synchronization
3328 // objects that are locked.
3329 int r;
3330 intptr_t recursion = rmonitor->recursions();
3331 for (intptr_t i=0; i <= recursion; i++) {
3332 r = rmonitor->raw_exit(thread);
3333 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3334 if (r != ObjectMonitor::OM_OK) { // robustness
3335 return JVMTI_ERROR_INTERNAL;
3336 }
3337 }
3338 }
3339 if (rmonitor->owner() != NULL) {
3340 // The caller is trying to destroy a monitor that is locked by
3341 // someone else. While this is not forbidden by the JVMTI
3342 // spec, it will cause an assertion failure on systems that don't
3343 // like destroying synchronization objects that are locked.
3344 // We indicate a problem with the error return (and leak the
3345 // monitor's memory).
3346 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3347 }
3348 }
3349
3350 delete rmonitor;
3351
3352 return JVMTI_ERROR_NONE;
3353 } /* end DestroyRawMonitor */
3354
3355
3356 // rmonitor - pre-checked for validity
3357 jvmtiError
3358 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3359 if (Threads::number_of_threads() == 0) {
3360 // No JavaThreads exist so ObjectMonitor enter cannot be
3361 // used, add this raw monitor to the pending list.
3362 // The pending monitors will be actually entered when
3363 // the VM is setup.
3364 // See transition_pending_raw_monitors in create_vm()
3365 // in thread.cpp.
3366 JvmtiPendingMonitors::enter(rmonitor);
3367 } else {
3368 int r = 0;
3369 Thread* thread = Thread::current();
3370
3371 if (thread->is_Java_thread()) {
3372 JavaThread* current_thread = (JavaThread*)thread;
3373
3374 #ifdef PROPER_TRANSITIONS
3375 // Not really unknown but ThreadInVMfromNative does more than we want
3376 ThreadInVMfromUnknown __tiv;
3377 {
3378 ThreadBlockInVM __tbivm(current_thread);
3379 r = rmonitor->raw_enter(current_thread);
3380 }
3381 #else
3382 /* Transition to thread_blocked without entering vm state */
3383 /* This is really evil. Normally you can't undo _thread_blocked */
3384 /* transitions like this because it would cause us to miss a */
3385 /* safepoint but since the thread was already in _thread_in_native */
3386 /* the thread is not leaving a safepoint safe state and it will */
3387 /* block when it tries to return from native. We can't safepoint */
3388 /* block in here because we could deadlock the vmthread. Blech. */
3389
3390 JavaThreadState state = current_thread->thread_state();
3391 assert(state == _thread_in_native, "Must be _thread_in_native");
3392 // frame should already be walkable since we are in native
3393 assert(!current_thread->has_last_Java_frame() ||
3394 current_thread->frame_anchor()->walkable(), "Must be walkable");
3395 current_thread->set_thread_state(_thread_blocked);
3396
3397 r = rmonitor->raw_enter(current_thread);
3398 // restore state, still at a safepoint safe state
3399 current_thread->set_thread_state(state);
3400
3401 #endif /* PROPER_TRANSITIONS */
3402 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3403 } else {
3404 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3405 r = rmonitor->raw_enter(thread);
3406 } else {
3407 ShouldNotReachHere();
3408 }
3409 }
3410
3411 if (r != ObjectMonitor::OM_OK) { // robustness
3412 return JVMTI_ERROR_INTERNAL;
3413 }
3414 }
3415 return JVMTI_ERROR_NONE;
3416 } /* end RawMonitorEnter */
3417
3418
3419 // rmonitor - pre-checked for validity
3420 jvmtiError
3421 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3422 jvmtiError err = JVMTI_ERROR_NONE;
3423
3424 if (Threads::number_of_threads() == 0) {
3425 // No JavaThreads exist so just remove this monitor from the pending list.
3426 // Bool value from exit is false if rmonitor is not in the list.
3427 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3428 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3429 }
3430 } else {
3431 int r = 0;
3432 Thread* thread = Thread::current();
3433
3434 if (thread->is_Java_thread()) {
3435 JavaThread* current_thread = (JavaThread*)thread;
3436 #ifdef PROPER_TRANSITIONS
3437 // Not really unknown but ThreadInVMfromNative does more than we want
3438 ThreadInVMfromUnknown __tiv;
3439 #endif /* PROPER_TRANSITIONS */
3440 r = rmonitor->raw_exit(current_thread);
3441 } else {
3442 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3443 r = rmonitor->raw_exit(thread);
3444 } else {
3445 ShouldNotReachHere();
3446 }
3447 }
3448
3449 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3450 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3451 } else {
3452 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3453 if (r != ObjectMonitor::OM_OK) { // robustness
3454 err = JVMTI_ERROR_INTERNAL;
3455 }
3456 }
3457 }
3458 return err;
3459 } /* end RawMonitorExit */
3460
3461
3462 // rmonitor - pre-checked for validity
3463 jvmtiError
3464 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3465 int r = 0;
3466 Thread* thread = Thread::current();
3467
3468 if (thread->is_Java_thread()) {
3469 JavaThread* current_thread = (JavaThread*)thread;
3470 #ifdef PROPER_TRANSITIONS
3471 // Not really unknown but ThreadInVMfromNative does more than we want
3472 ThreadInVMfromUnknown __tiv;
3473 {
3474 ThreadBlockInVM __tbivm(current_thread);
3475 r = rmonitor->raw_wait(millis, true, current_thread);
3476 }
3477 #else
3478 /* Transition to thread_blocked without entering vm state */
3479 /* This is really evil. Normally you can't undo _thread_blocked */
3480 /* transitions like this because it would cause us to miss a */
3481 /* safepoint but since the thread was already in _thread_in_native */
3482 /* the thread is not leaving a safepoint safe state and it will */
3483 /* block when it tries to return from native. We can't safepoint */
3484 /* block in here because we could deadlock the vmthread. Blech. */
3485
3486 JavaThreadState state = current_thread->thread_state();
3487 assert(state == _thread_in_native, "Must be _thread_in_native");
3488 // frame should already be walkable since we are in native
3489 assert(!current_thread->has_last_Java_frame() ||
3490 current_thread->frame_anchor()->walkable(), "Must be walkable");
3491 current_thread->set_thread_state(_thread_blocked);
3492
3493 r = rmonitor->raw_wait(millis, true, current_thread);
3494 // restore state, still at a safepoint safe state
3495 current_thread->set_thread_state(state);
3496
3497 #endif /* PROPER_TRANSITIONS */
3498 } else {
3499 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3500 r = rmonitor->raw_wait(millis, true, thread);
3501 } else {
3502 ShouldNotReachHere();
3503 }
3504 }
3505
3506 switch (r) {
3507 case ObjectMonitor::OM_INTERRUPTED:
3508 return JVMTI_ERROR_INTERRUPT;
3509 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3510 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3511 }
3512 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3513 if (r != ObjectMonitor::OM_OK) { // robustness
3514 return JVMTI_ERROR_INTERNAL;
3515 }
3516
3517 return JVMTI_ERROR_NONE;
3518 } /* end RawMonitorWait */
3519
3520
3521 // rmonitor - pre-checked for validity
3522 jvmtiError
3523 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3524 int r = 0;
3525 Thread* thread = Thread::current();
3526
3527 if (thread->is_Java_thread()) {
3528 JavaThread* current_thread = (JavaThread*)thread;
3529 // Not really unknown but ThreadInVMfromNative does more than we want
3530 ThreadInVMfromUnknown __tiv;
3531 r = rmonitor->raw_notify(current_thread);
3532 } else {
3533 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3534 r = rmonitor->raw_notify(thread);
3535 } else {
3536 ShouldNotReachHere();
3537 }
3538 }
3539
3540 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3541 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3542 }
3543 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3544 if (r != ObjectMonitor::OM_OK) { // robustness
3545 return JVMTI_ERROR_INTERNAL;
3546 }
3547
3548 return JVMTI_ERROR_NONE;
3549 } /* end RawMonitorNotify */
3550
3551
3552 // rmonitor - pre-checked for validity
3553 jvmtiError
3554 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3555 int r = 0;
3556 Thread* thread = Thread::current();
3557
3558 if (thread->is_Java_thread()) {
3559 JavaThread* current_thread = (JavaThread*)thread;
3560 ThreadInVMfromUnknown __tiv;
3561 r = rmonitor->raw_notifyAll(current_thread);
3562 } else {
3563 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3564 r = rmonitor->raw_notifyAll(thread);
3565 } else {
3566 ShouldNotReachHere();
3567 }
3568 }
3569
3570 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3571 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3572 }
3573 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3574 if (r != ObjectMonitor::OM_OK) { // robustness
3575 return JVMTI_ERROR_INTERNAL;
3576 }
3577
3578 return JVMTI_ERROR_NONE;
3579 } /* end RawMonitorNotifyAll */
3580
3581
3582 //
3583 // JNI Function Interception functions
3584 //
3585
3586
3587 // function_table - pre-checked for NULL
3588 jvmtiError
3589 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3590 // Copy jni function table at safepoint.
3591 VM_JNIFunctionTableCopier copier(function_table);
3592 VMThread::execute(&copier);
3593
3594 return JVMTI_ERROR_NONE;
3595 } /* end SetJNIFunctionTable */
3596
3597
3598 // function_table - pre-checked for NULL
3599 jvmtiError
3600 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3601 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3602 if (*function_table == NULL)
3603 return JVMTI_ERROR_OUT_OF_MEMORY;
3604 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3605 return JVMTI_ERROR_NONE;
3606 } /* end GetJNIFunctionTable */
3607
3608
3609 //
3610 // Event Management functions
3611 //
3612
3613 jvmtiError
3614 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3615 // can only generate two event types
3616 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3617 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3618 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3619 }
3620
3621 // for compiled_method_load events we must check that the environment
3622 // has the can_generate_compiled_method_load_events capability.
3623 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3624 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3625 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3626 }
3627 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3628 } else {
3629 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3630 }
3631
3632 } /* end GenerateEvents */
3633
3634
3635 //
3636 // Extension Mechanism functions
3637 //
3638
3639 // extension_count_ptr - pre-checked for NULL
3640 // extensions - pre-checked for NULL
3641 jvmtiError
3642 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3643 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3644 } /* end GetExtensionFunctions */
3645
3646
3647 // extension_count_ptr - pre-checked for NULL
3648 // extensions - pre-checked for NULL
3649 jvmtiError
3650 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3651 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3652 } /* end GetExtensionEvents */
3653
3654
3655 // callback - NULL is a valid value, must be checked
3656 jvmtiError
3657 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3658 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3659 } /* end SetExtensionEventCallback */
3660
3661 //
3662 // Timers functions
3663 //
3664
3665 // info_ptr - pre-checked for NULL
3666 jvmtiError
3667 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3668 os::current_thread_cpu_time_info(info_ptr);
3669 return JVMTI_ERROR_NONE;
3670 } /* end GetCurrentThreadCpuTimerInfo */
3671
3672
3673 // nanos_ptr - pre-checked for NULL
3674 jvmtiError
3675 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3676 *nanos_ptr = os::current_thread_cpu_time();
3677 return JVMTI_ERROR_NONE;
3678 } /* end GetCurrentThreadCpuTime */
3679
3680
3681 // info_ptr - pre-checked for NULL
3682 jvmtiError
3683 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3684 os::thread_cpu_time_info(info_ptr);
3685 return JVMTI_ERROR_NONE;
3686 } /* end GetThreadCpuTimerInfo */
3687
3688
3689 // Threads_lock NOT held, java_thread not protected by lock
3690 // java_thread - pre-checked
3691 // nanos_ptr - pre-checked for NULL
3692 jvmtiError
3693 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3694 *nanos_ptr = os::thread_cpu_time(java_thread);
3695 return JVMTI_ERROR_NONE;
3696 } /* end GetThreadCpuTime */
3697
3698
3699 // info_ptr - pre-checked for NULL
3700 jvmtiError
3701 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3702 os::javaTimeNanos_info(info_ptr);
3703 return JVMTI_ERROR_NONE;
3704 } /* end GetTimerInfo */
3705
3706
3707 // nanos_ptr - pre-checked for NULL
3708 jvmtiError
3709 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3710 *nanos_ptr = os::javaTimeNanos();
3711 return JVMTI_ERROR_NONE;
3712 } /* end GetTime */
3713
3714
3715 // processor_count_ptr - pre-checked for NULL
3716 jvmtiError
3717 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3718 *processor_count_ptr = os::active_processor_count();
3719 return JVMTI_ERROR_NONE;
3720 } /* end GetAvailableProcessors */
3721
3722 //
3723 // System Properties functions
3724 //
3725
3726 // count_ptr - pre-checked for NULL
3727 // property_ptr - pre-checked for NULL
3728 jvmtiError
3729 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3730 jvmtiError err = JVMTI_ERROR_NONE;
3731
3732 // Get the number of readable properties.
3733 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3734
3735 // Allocate memory to hold the exact number of readable properties.
3736 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3737 if (err != JVMTI_ERROR_NONE) {
3738 return err;
3739 }
3740 int readable_count = 0;
3741 // Loop through the system properties until all the readable properties are found.
3742 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3743 if (p->is_readable()) {
3744 const char *key = p->key();
3745 char **tmp_value = *property_ptr+readable_count;
3746 readable_count++;
3747 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3748 if (err == JVMTI_ERROR_NONE) {
3749 strcpy(*tmp_value, key);
3750 } else {
3751 // clean up previously allocated memory.
3752 for (int j=0; j<readable_count; j++) {
3753 Deallocate((unsigned char*)*property_ptr+j);
3754 }
3755 Deallocate((unsigned char*)property_ptr);
3756 break;
3757 }
3758 }
3759 }
3760 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3761 return err;
3762 } /* end GetSystemProperties */
3763
3764
3765 // property - pre-checked for NULL
3766 // value_ptr - pre-checked for NULL
3767 jvmtiError
3768 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3769 jvmtiError err = JVMTI_ERROR_NONE;
3770 const char *value;
3771
3772 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3773 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3774 if (value == NULL) {
3775 err = JVMTI_ERROR_NOT_AVAILABLE;
3776 } else {
3777 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3778 if (err == JVMTI_ERROR_NONE) {
3779 strcpy(*value_ptr, value);
3780 }
3781 }
3782 return err;
3783 } /* end GetSystemProperty */
3784
3785
3786 // property - pre-checked for NULL
3787 // value - NULL is a valid value, must be checked
3788 jvmtiError
3789 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3790 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3791
3792 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3793 if (strcmp(property, p->key()) == 0) {
3794 if (p->set_writeable_value(value_ptr)) {
3795 err = JVMTI_ERROR_NONE;
3796 }
3797 }
3798 }
3799 return err;
3800 } /* end SetSystemProperty */