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::GetObjectAllocTraces(jvmtiAllocTraceInfo** stack_traces,
2032 jint* trace_counter_ptr) {
2033 ForceGarbageCollection();
2034 HeapThreadTransition htt(Thread::current());
2035 if (stack_traces == NULL) {
2036 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2037 }
2038
2039 HeapMonitoring::get_live_traces(this, stack_traces, trace_counter_ptr);
2040 return JVMTI_ERROR_NONE;
2041 } /* end GetLiveTraces */
2042
2043 // Get the recently garbage collected allocations.
2044 jvmtiError
2045 JvmtiEnv::GetGarbageTraces(jvmtiAllocTraceInfo** stack_traces,
2046 jint* trace_counter_ptr) {
2047 HeapThreadTransition htt(Thread::current());
2048 if (stack_traces == NULL) {
2049 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2050 }
2051
2052 HeapMonitoring::get_garbage_traces(this, stack_traces, trace_counter_ptr);
2053 return JVMTI_ERROR_NONE;
2054 } /* end GetGarbageTraces */
2055
2056 // Get the frequently garbage collected traces.
2057 jvmtiError
2058 JvmtiEnv::GetFrequentGarbageTraces(jvmtiAllocTraceInfo** stack_traces,
2059 jint* trace_counter_ptr) {
2060 HeapThreadTransition htt(Thread::current());
2061 if (stack_traces == NULL) {
2062 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2063 }
2064
2065 HeapMonitoring::get_frequent_garbage_traces(this, stack_traces, trace_counter_ptr);
2066 return JVMTI_ERROR_NONE;
2067 } /* end GetFrequentGarbageTraces */
2068
2069 // Get the traces that were garbage collected in the last full GC.
2070 jvmtiError
2071 JvmtiEnv::GetCachedObjectAllocTraces(jvmtiAllocTraceInfo** stack_traces,
2072 jint* trace_counter_ptr) {
2073 HeapThreadTransition htt(Thread::current());
2074 if (stack_traces == NULL) {
2075 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2076 }
2077
2078 HeapMonitoring::get_cached_traces(this, stack_traces, trace_counter_ptr);
2079 return JVMTI_ERROR_NONE;
2080 } /* end GetObjectAllocTraces */
2081
2082 // Get the heap sampling statistics.
2083 jvmtiError
2084 JvmtiEnv::GetHeapSamplingStats(jvmtiHeapSamplingStats* stats) {
2085 if (stats == NULL) {
2086 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
2087 }
2088 HeapMonitoring::get_sampling_statistics(stats);
2089 return JVMTI_ERROR_NONE;
2090 } /* end GetHeapSamplingStats */
2091
2092 //
2093 // Local Variable functions
2094 //
2095
2096 // Threads_lock NOT held, java_thread not protected by lock
2097 // java_thread - pre-checked
2098 // java_thread - unchecked
2099 // depth - pre-checked as non-negative
2100 // value_ptr - pre-checked for NULL
2101 jvmtiError
2102 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2103 JavaThread* current_thread = JavaThread::current();
2104 // rm object is created to clean up the javaVFrame created in
2105 // doit_prologue(), but after doit() is finished with it.
2106 ResourceMark rm(current_thread);
2107
2108 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2109 VMThread::execute(&op);
2110 jvmtiError err = op.result();
2111 if (err != JVMTI_ERROR_NONE) {
2112 return err;
2113 } else {
2114 *value_ptr = op.value().l;
2115 return JVMTI_ERROR_NONE;
2116 }
2117 } /* end GetLocalObject */
2118
2119 // Threads_lock NOT held, java_thread not protected by lock
2120 // java_thread - pre-checked
2121 // java_thread - unchecked
2122 // depth - pre-checked as non-negative
2123 // value - pre-checked for NULL
2124 jvmtiError
2125 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2126 JavaThread* current_thread = JavaThread::current();
2127 // rm object is created to clean up the javaVFrame created in
2128 // doit_prologue(), but after doit() is finished with it.
2129 ResourceMark rm(current_thread);
2130
2131 VM_GetReceiver op(java_thread, current_thread, depth);
2132 VMThread::execute(&op);
2133 jvmtiError err = op.result();
2134 if (err != JVMTI_ERROR_NONE) {
2135 return err;
2136 } else {
2137 *value_ptr = op.value().l;
2138 return JVMTI_ERROR_NONE;
2139 }
2140 } /* end GetLocalInstance */
2141
2142
2143 // Threads_lock NOT held, java_thread not protected by lock
2144 // java_thread - pre-checked
2145 // java_thread - unchecked
2146 // depth - pre-checked as non-negative
2147 // value_ptr - pre-checked for NULL
2148 jvmtiError
2149 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2150 // rm object is created to clean up the javaVFrame created in
2151 // doit_prologue(), but after doit() is finished with it.
2152 ResourceMark rm;
2153
2154 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2155 VMThread::execute(&op);
2156 *value_ptr = op.value().i;
2157 return op.result();
2158 } /* end GetLocalInt */
2159
2160
2161 // Threads_lock NOT held, java_thread not protected by lock
2162 // java_thread - pre-checked
2163 // java_thread - unchecked
2164 // depth - pre-checked as non-negative
2165 // value_ptr - pre-checked for NULL
2166 jvmtiError
2167 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2168 // rm object is created to clean up the javaVFrame created in
2169 // doit_prologue(), but after doit() is finished with it.
2170 ResourceMark rm;
2171
2172 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2173 VMThread::execute(&op);
2174 *value_ptr = op.value().j;
2175 return op.result();
2176 } /* end GetLocalLong */
2177
2178
2179 // Threads_lock NOT held, java_thread not protected by lock
2180 // java_thread - pre-checked
2181 // java_thread - unchecked
2182 // depth - pre-checked as non-negative
2183 // value_ptr - pre-checked for NULL
2184 jvmtiError
2185 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2186 // rm object is created to clean up the javaVFrame created in
2187 // doit_prologue(), but after doit() is finished with it.
2188 ResourceMark rm;
2189
2190 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2191 VMThread::execute(&op);
2192 *value_ptr = op.value().f;
2193 return op.result();
2194 } /* end GetLocalFloat */
2195
2196
2197 // Threads_lock NOT held, java_thread not protected by lock
2198 // java_thread - pre-checked
2199 // java_thread - unchecked
2200 // depth - pre-checked as non-negative
2201 // value_ptr - pre-checked for NULL
2202 jvmtiError
2203 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2204 // rm object is created to clean up the javaVFrame created in
2205 // doit_prologue(), but after doit() is finished with it.
2206 ResourceMark rm;
2207
2208 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2209 VMThread::execute(&op);
2210 *value_ptr = op.value().d;
2211 return op.result();
2212 } /* end GetLocalDouble */
2213
2214
2215 // Threads_lock NOT held, java_thread not protected by lock
2216 // java_thread - pre-checked
2217 // java_thread - unchecked
2218 // depth - pre-checked as non-negative
2219 jvmtiError
2220 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2221 // rm object is created to clean up the javaVFrame created in
2222 // doit_prologue(), but after doit() is finished with it.
2223 ResourceMark rm;
2224 jvalue val;
2225 val.l = value;
2226 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2227 VMThread::execute(&op);
2228 return op.result();
2229 } /* end SetLocalObject */
2230
2231
2232 // Threads_lock NOT held, java_thread not protected by lock
2233 // java_thread - pre-checked
2234 // java_thread - unchecked
2235 // depth - pre-checked as non-negative
2236 jvmtiError
2237 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2238 // rm object is created to clean up the javaVFrame created in
2239 // doit_prologue(), but after doit() is finished with it.
2240 ResourceMark rm;
2241 jvalue val;
2242 val.i = value;
2243 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2244 VMThread::execute(&op);
2245 return op.result();
2246 } /* end SetLocalInt */
2247
2248
2249 // Threads_lock NOT held, java_thread not protected by lock
2250 // java_thread - pre-checked
2251 // java_thread - unchecked
2252 // depth - pre-checked as non-negative
2253 jvmtiError
2254 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2255 // rm object is created to clean up the javaVFrame created in
2256 // doit_prologue(), but after doit() is finished with it.
2257 ResourceMark rm;
2258 jvalue val;
2259 val.j = value;
2260 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2261 VMThread::execute(&op);
2262 return op.result();
2263 } /* end SetLocalLong */
2264
2265
2266 // Threads_lock NOT held, java_thread not protected by lock
2267 // java_thread - pre-checked
2268 // java_thread - unchecked
2269 // depth - pre-checked as non-negative
2270 jvmtiError
2271 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2272 // rm object is created to clean up the javaVFrame created in
2273 // doit_prologue(), but after doit() is finished with it.
2274 ResourceMark rm;
2275 jvalue val;
2276 val.f = value;
2277 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2278 VMThread::execute(&op);
2279 return op.result();
2280 } /* end SetLocalFloat */
2281
2282
2283 // Threads_lock NOT held, java_thread not protected by lock
2284 // java_thread - pre-checked
2285 // java_thread - unchecked
2286 // depth - pre-checked as non-negative
2287 jvmtiError
2288 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2289 // rm object is created to clean up the javaVFrame created in
2290 // doit_prologue(), but after doit() is finished with it.
2291 ResourceMark rm;
2292 jvalue val;
2293 val.d = value;
2294 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2295 VMThread::execute(&op);
2296 return op.result();
2297 } /* end SetLocalDouble */
2298
2299
2300 //
2301 // Breakpoint functions
2302 //
2303
2304 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2305 jvmtiError
2306 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2307 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2308 if (location < 0) { // simple invalid location check first
2309 return JVMTI_ERROR_INVALID_LOCATION;
2310 }
2311 // verify that the breakpoint is not past the end of the method
2312 if (location >= (jlocation) method_oop->code_size()) {
2313 return JVMTI_ERROR_INVALID_LOCATION;
2314 }
2315
2316 ResourceMark rm;
2317 JvmtiBreakpoint bp(method_oop, location);
2318 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2319 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2320 return JVMTI_ERROR_DUPLICATE;
2321
2322 if (TraceJVMTICalls) {
2323 jvmti_breakpoints.print();
2324 }
2325
2326 return JVMTI_ERROR_NONE;
2327 } /* end SetBreakpoint */
2328
2329
2330 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2331 jvmtiError
2332 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2333 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2334
2335 if (location < 0) { // simple invalid location check first
2336 return JVMTI_ERROR_INVALID_LOCATION;
2337 }
2338
2339 // verify that the breakpoint is not past the end of the method
2340 if (location >= (jlocation) method_oop->code_size()) {
2341 return JVMTI_ERROR_INVALID_LOCATION;
2342 }
2343
2344 JvmtiBreakpoint bp(method_oop, location);
2345
2346 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2347 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2348 return JVMTI_ERROR_NOT_FOUND;
2349
2350 if (TraceJVMTICalls) {
2351 jvmti_breakpoints.print();
2352 }
2353
2354 return JVMTI_ERROR_NONE;
2355 } /* end ClearBreakpoint */
2356
2357
2358 //
2359 // Watched Field functions
2360 //
2361
2362 jvmtiError
2363 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2364 // make sure we haven't set this watch before
2365 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2366 fdesc_ptr->set_is_field_access_watched(true);
2367
2368 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2369
2370 return JVMTI_ERROR_NONE;
2371 } /* end SetFieldAccessWatch */
2372
2373
2374 jvmtiError
2375 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2376 // make sure we have a watch to clear
2377 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2378 fdesc_ptr->set_is_field_access_watched(false);
2379
2380 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2381
2382 return JVMTI_ERROR_NONE;
2383 } /* end ClearFieldAccessWatch */
2384
2385
2386 jvmtiError
2387 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2388 // make sure we haven't set this watch before
2389 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2390 fdesc_ptr->set_is_field_modification_watched(true);
2391
2392 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2393
2394 return JVMTI_ERROR_NONE;
2395 } /* end SetFieldModificationWatch */
2396
2397
2398 jvmtiError
2399 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2400 // make sure we have a watch to clear
2401 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2402 fdesc_ptr->set_is_field_modification_watched(false);
2403
2404 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2405
2406 return JVMTI_ERROR_NONE;
2407 } /* end ClearFieldModificationWatch */
2408
2409 //
2410 // Class functions
2411 //
2412
2413
2414 // k_mirror - may be primitive, this must be checked
2415 // signature_ptr - NULL is a valid value, must be checked
2416 // generic_ptr - NULL is a valid value, must be checked
2417 jvmtiError
2418 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2419 ResourceMark rm;
2420 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2421 Klass* k = NULL;
2422 if (!isPrimitive) {
2423 k = java_lang_Class::as_Klass(k_mirror);
2424 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2425 }
2426 if (signature_ptr != NULL) {
2427 char* result = NULL;
2428 if (isPrimitive) {
2429 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2430 result = (char*) jvmtiMalloc(2);
2431 result[0] = tchar;
2432 result[1] = '\0';
2433 } else {
2434 const char* class_sig = k->signature_name();
2435 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2436 strcpy(result, class_sig);
2437 }
2438 *signature_ptr = result;
2439 }
2440 if (generic_ptr != NULL) {
2441 *generic_ptr = NULL;
2442 if (!isPrimitive && k->is_instance_klass()) {
2443 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2444 if (soo != NULL) {
2445 const char *gen_sig = soo->as_C_string();
2446 if (gen_sig != NULL) {
2447 char* gen_result;
2448 jvmtiError err = allocate(strlen(gen_sig) + 1,
2449 (unsigned char **)&gen_result);
2450 if (err != JVMTI_ERROR_NONE) {
2451 return err;
2452 }
2453 strcpy(gen_result, gen_sig);
2454 *generic_ptr = gen_result;
2455 }
2456 }
2457 }
2458 }
2459 return JVMTI_ERROR_NONE;
2460 } /* end GetClassSignature */
2461
2462
2463 // k_mirror - may be primitive, this must be checked
2464 // status_ptr - pre-checked for NULL
2465 jvmtiError
2466 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2467 jint result = 0;
2468 if (java_lang_Class::is_primitive(k_mirror)) {
2469 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2470 } else {
2471 Klass* k = java_lang_Class::as_Klass(k_mirror);
2472 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2473 result = k->jvmti_class_status();
2474 }
2475 *status_ptr = result;
2476
2477 return JVMTI_ERROR_NONE;
2478 } /* end GetClassStatus */
2479
2480
2481 // k_mirror - may be primitive, this must be checked
2482 // source_name_ptr - pre-checked for NULL
2483 jvmtiError
2484 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2485 if (java_lang_Class::is_primitive(k_mirror)) {
2486 return JVMTI_ERROR_ABSENT_INFORMATION;
2487 }
2488 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2489 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2490
2491 if (!k_klass->is_instance_klass()) {
2492 return JVMTI_ERROR_ABSENT_INFORMATION;
2493 }
2494
2495 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2496 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2497 {
2498 JavaThread* current_thread = JavaThread::current();
2499 ResourceMark rm(current_thread);
2500 const char* sfncp = (const char*) sfnOop->as_C_string();
2501 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2502 strcpy(*source_name_ptr, sfncp);
2503 }
2504
2505 return JVMTI_ERROR_NONE;
2506 } /* end GetSourceFileName */
2507
2508
2509 // k_mirror - may be primitive, this must be checked
2510 // modifiers_ptr - pre-checked for NULL
2511 jvmtiError
2512 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2513 JavaThread* current_thread = JavaThread::current();
2514 jint result = 0;
2515 if (!java_lang_Class::is_primitive(k_mirror)) {
2516 Klass* k = java_lang_Class::as_Klass(k_mirror);
2517 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2518 result = k->compute_modifier_flags(current_thread);
2519 JavaThread* THREAD = current_thread; // pass to macros
2520 if (HAS_PENDING_EXCEPTION) {
2521 CLEAR_PENDING_EXCEPTION;
2522 return JVMTI_ERROR_INTERNAL;
2523 };
2524
2525 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2526 if(k->is_super()) {
2527 result |= JVM_ACC_SUPER;
2528 }
2529 } else {
2530 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2531 }
2532 *modifiers_ptr = result;
2533
2534 return JVMTI_ERROR_NONE;
2535 } /* end GetClassModifiers */
2536
2537
2538 // k_mirror - may be primitive, this must be checked
2539 // method_count_ptr - pre-checked for NULL
2540 // methods_ptr - pre-checked for NULL
2541 jvmtiError
2542 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2543 JavaThread* current_thread = JavaThread::current();
2544 HandleMark hm(current_thread);
2545
2546 if (java_lang_Class::is_primitive(k_mirror)) {
2547 *method_count_ptr = 0;
2548 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2549 return JVMTI_ERROR_NONE;
2550 }
2551 Klass* k = java_lang_Class::as_Klass(k_mirror);
2552 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2553
2554 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2555 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2556 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2557 }
2558
2559 if (!k->is_instance_klass()) {
2560 *method_count_ptr = 0;
2561 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2562 return JVMTI_ERROR_NONE;
2563 }
2564 InstanceKlass* ik = InstanceKlass::cast(k);
2565 // Allocate the result and fill it in
2566 int result_length = ik->methods()->length();
2567 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2568 int index;
2569 bool jmethodids_found = true;
2570
2571 if (JvmtiExport::can_maintain_original_method_order()) {
2572 // Use the original method ordering indices stored in the class, so we can emit
2573 // jmethodIDs in the order they appeared in the class file
2574 for (index = 0; index < result_length; index++) {
2575 Method* m = ik->methods()->at(index);
2576 int original_index = ik->method_ordering()->at(index);
2577 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2578 jmethodID id;
2579 if (jmethodids_found) {
2580 id = m->find_jmethod_id_or_null();
2581 if (id == NULL) {
2582 // If we find an uninitialized value, make sure there is
2583 // enough space for all the uninitialized values we might
2584 // find.
2585 ik->ensure_space_for_methodids(index);
2586 jmethodids_found = false;
2587 id = m->jmethod_id();
2588 }
2589 } else {
2590 id = m->jmethod_id();
2591 }
2592 result_list[original_index] = id;
2593 }
2594 } else {
2595 // otherwise just copy in any order
2596 for (index = 0; index < result_length; index++) {
2597 Method* m = ik->methods()->at(index);
2598 jmethodID id;
2599 if (jmethodids_found) {
2600 id = m->find_jmethod_id_or_null();
2601 if (id == NULL) {
2602 // If we find an uninitialized value, make sure there is
2603 // enough space for all the uninitialized values we might
2604 // find.
2605 ik->ensure_space_for_methodids(index);
2606 jmethodids_found = false;
2607 id = m->jmethod_id();
2608 }
2609 } else {
2610 id = m->jmethod_id();
2611 }
2612 result_list[index] = id;
2613 }
2614 }
2615 // Fill in return value.
2616 *method_count_ptr = result_length;
2617 *methods_ptr = result_list;
2618
2619 return JVMTI_ERROR_NONE;
2620 } /* end GetClassMethods */
2621
2622
2623 // k_mirror - may be primitive, this must be checked
2624 // field_count_ptr - pre-checked for NULL
2625 // fields_ptr - pre-checked for NULL
2626 jvmtiError
2627 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2628 if (java_lang_Class::is_primitive(k_mirror)) {
2629 *field_count_ptr = 0;
2630 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2631 return JVMTI_ERROR_NONE;
2632 }
2633 JavaThread* current_thread = JavaThread::current();
2634 HandleMark hm(current_thread);
2635 Klass* k = java_lang_Class::as_Klass(k_mirror);
2636 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2637
2638 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2639 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2640 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2641 }
2642
2643 if (!k->is_instance_klass()) {
2644 *field_count_ptr = 0;
2645 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2646 return JVMTI_ERROR_NONE;
2647 }
2648
2649
2650 InstanceKlass* ik = InstanceKlass::cast(k);
2651
2652 int result_count = 0;
2653 // First, count the fields.
2654 FilteredFieldStream flds(ik, true, true);
2655 result_count = flds.field_count();
2656
2657 // Allocate the result and fill it in
2658 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2659 // The JVMTI spec requires fields in the order they occur in the class file,
2660 // this is the reverse order of what FieldStream hands out.
2661 int id_index = (result_count - 1);
2662
2663 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2664 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2665 ik, src_st.offset(),
2666 src_st.access_flags().is_static());
2667 }
2668 assert(id_index == -1, "just checking");
2669 // Fill in the results
2670 *field_count_ptr = result_count;
2671 *fields_ptr = result_list;
2672
2673 return JVMTI_ERROR_NONE;
2674 } /* end GetClassFields */
2675
2676
2677 // k_mirror - may be primitive, this must be checked
2678 // interface_count_ptr - pre-checked for NULL
2679 // interfaces_ptr - pre-checked for NULL
2680 jvmtiError
2681 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2682 {
2683 if (java_lang_Class::is_primitive(k_mirror)) {
2684 *interface_count_ptr = 0;
2685 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2686 return JVMTI_ERROR_NONE;
2687 }
2688 JavaThread* current_thread = JavaThread::current();
2689 HandleMark hm(current_thread);
2690 Klass* k = java_lang_Class::as_Klass(k_mirror);
2691 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2692
2693 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2694 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2695 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2696
2697 if (!k->is_instance_klass()) {
2698 *interface_count_ptr = 0;
2699 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2700 return JVMTI_ERROR_NONE;
2701 }
2702
2703 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2704 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2705 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2706 for (int i_index = 0; i_index < result_length; i_index += 1) {
2707 Klass* klass_at = interface_list->at(i_index);
2708 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2709 assert(klass_at->is_interface(), "interfaces must be interfaces");
2710 oop mirror_at = klass_at->java_mirror();
2711 Handle handle_at = Handle(current_thread, mirror_at);
2712 result_list[i_index] = (jclass) jni_reference(handle_at);
2713 }
2714 *interface_count_ptr = result_length;
2715 *interfaces_ptr = result_list;
2716 }
2717
2718 return JVMTI_ERROR_NONE;
2719 } /* end GetImplementedInterfaces */
2720
2721
2722 // k_mirror - may be primitive, this must be checked
2723 // minor_version_ptr - pre-checked for NULL
2724 // major_version_ptr - pre-checked for NULL
2725 jvmtiError
2726 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2727 if (java_lang_Class::is_primitive(k_mirror)) {
2728 return JVMTI_ERROR_ABSENT_INFORMATION;
2729 }
2730 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2731
2732 jint status = klass->jvmti_class_status();
2733 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2734 return JVMTI_ERROR_INVALID_CLASS;
2735 }
2736 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2737 return JVMTI_ERROR_ABSENT_INFORMATION;
2738 }
2739
2740 InstanceKlass* ik = InstanceKlass::cast(klass);
2741 *minor_version_ptr = ik->minor_version();
2742 *major_version_ptr = ik->major_version();
2743
2744 return JVMTI_ERROR_NONE;
2745 } /* end GetClassVersionNumbers */
2746
2747
2748 // k_mirror - may be primitive, this must be checked
2749 // constant_pool_count_ptr - pre-checked for NULL
2750 // constant_pool_byte_count_ptr - pre-checked for NULL
2751 // constant_pool_bytes_ptr - pre-checked for NULL
2752 jvmtiError
2753 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2754 if (java_lang_Class::is_primitive(k_mirror)) {
2755 return JVMTI_ERROR_ABSENT_INFORMATION;
2756 }
2757
2758 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2759 Thread *thread = Thread::current();
2760 ResourceMark rm(thread);
2761
2762 jint status = klass->jvmti_class_status();
2763 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2764 return JVMTI_ERROR_INVALID_CLASS;
2765 }
2766 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2767 return JVMTI_ERROR_ABSENT_INFORMATION;
2768 }
2769
2770 InstanceKlass* ik = InstanceKlass::cast(klass);
2771 JvmtiConstantPoolReconstituter reconstituter(ik);
2772 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2773 return reconstituter.get_error();
2774 }
2775
2776 unsigned char *cpool_bytes;
2777 int cpool_size = reconstituter.cpool_size();
2778 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2779 return reconstituter.get_error();
2780 }
2781 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2782 if (res != JVMTI_ERROR_NONE) {
2783 return res;
2784 }
2785 reconstituter.copy_cpool_bytes(cpool_bytes);
2786 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2787 return reconstituter.get_error();
2788 }
2789
2790 constantPoolHandle constants(thread, ik->constants());
2791 *constant_pool_count_ptr = constants->length();
2792 *constant_pool_byte_count_ptr = cpool_size;
2793 *constant_pool_bytes_ptr = cpool_bytes;
2794
2795 return JVMTI_ERROR_NONE;
2796 } /* end GetConstantPool */
2797
2798
2799 // k_mirror - may be primitive, this must be checked
2800 // is_interface_ptr - pre-checked for NULL
2801 jvmtiError
2802 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2803 {
2804 bool result = false;
2805 if (!java_lang_Class::is_primitive(k_mirror)) {
2806 Klass* k = java_lang_Class::as_Klass(k_mirror);
2807 if (k != NULL && k->is_interface()) {
2808 result = true;
2809 }
2810 }
2811 *is_interface_ptr = result;
2812 }
2813
2814 return JVMTI_ERROR_NONE;
2815 } /* end IsInterface */
2816
2817
2818 // k_mirror - may be primitive, this must be checked
2819 // is_array_class_ptr - pre-checked for NULL
2820 jvmtiError
2821 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2822 {
2823 bool result = false;
2824 if (!java_lang_Class::is_primitive(k_mirror)) {
2825 Klass* k = java_lang_Class::as_Klass(k_mirror);
2826 if (k != NULL && k->is_array_klass()) {
2827 result = true;
2828 }
2829 }
2830 *is_array_class_ptr = result;
2831 }
2832
2833 return JVMTI_ERROR_NONE;
2834 } /* end IsArrayClass */
2835
2836
2837 // k_mirror - may be primitive, this must be checked
2838 // classloader_ptr - pre-checked for NULL
2839 jvmtiError
2840 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2841 {
2842 if (java_lang_Class::is_primitive(k_mirror)) {
2843 *classloader_ptr = (jclass) jni_reference(Handle());
2844 return JVMTI_ERROR_NONE;
2845 }
2846 JavaThread* current_thread = JavaThread::current();
2847 HandleMark hm(current_thread);
2848 Klass* k = java_lang_Class::as_Klass(k_mirror);
2849 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2850
2851 oop result_oop = k->class_loader();
2852 if (result_oop == NULL) {
2853 *classloader_ptr = (jclass) jni_reference(Handle());
2854 return JVMTI_ERROR_NONE;
2855 }
2856 Handle result_handle = Handle(current_thread, result_oop);
2857 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2858 *classloader_ptr = result_jnihandle;
2859 }
2860 return JVMTI_ERROR_NONE;
2861 } /* end GetClassLoader */
2862
2863
2864 // k_mirror - may be primitive, this must be checked
2865 // source_debug_extension_ptr - pre-checked for NULL
2866 jvmtiError
2867 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2868 {
2869 if (java_lang_Class::is_primitive(k_mirror)) {
2870 return JVMTI_ERROR_ABSENT_INFORMATION;
2871 }
2872 Klass* k = java_lang_Class::as_Klass(k_mirror);
2873 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2874 if (!k->is_instance_klass()) {
2875 return JVMTI_ERROR_ABSENT_INFORMATION;
2876 }
2877 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2878 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2879
2880 {
2881 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2882 strcpy(*source_debug_extension_ptr, sde);
2883 }
2884 }
2885
2886 return JVMTI_ERROR_NONE;
2887 } /* end GetSourceDebugExtension */
2888
2889 //
2890 // Object functions
2891 //
2892
2893 // hash_code_ptr - pre-checked for NULL
2894 jvmtiError
2895 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2896 oop mirror = JNIHandles::resolve_external_guard(object);
2897 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2898 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2899
2900 {
2901 jint result = (jint) mirror->identity_hash();
2902 *hash_code_ptr = result;
2903 }
2904 return JVMTI_ERROR_NONE;
2905 } /* end GetObjectHashCode */
2906
2907
2908 // info_ptr - pre-checked for NULL
2909 jvmtiError
2910 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2911 JavaThread* calling_thread = JavaThread::current();
2912 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2913 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2914 // Some of the critical threads were not suspended. go to a safepoint and try again
2915 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2916 VMThread::execute(&op);
2917 err = op.result();
2918 }
2919 return err;
2920 } /* end GetObjectMonitorUsage */
2921
2922
2923 //
2924 // Field functions
2925 //
2926
2927 // name_ptr - NULL is a valid value, must be checked
2928 // signature_ptr - NULL is a valid value, must be checked
2929 // generic_ptr - NULL is a valid value, must be checked
2930 jvmtiError
2931 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2932 JavaThread* current_thread = JavaThread::current();
2933 ResourceMark rm(current_thread);
2934 if (name_ptr == NULL) {
2935 // just don't return the name
2936 } else {
2937 const char* fieldName = fdesc_ptr->name()->as_C_string();
2938 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2939 if (*name_ptr == NULL)
2940 return JVMTI_ERROR_OUT_OF_MEMORY;
2941 strcpy(*name_ptr, fieldName);
2942 }
2943 if (signature_ptr== NULL) {
2944 // just don't return the signature
2945 } else {
2946 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2947 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2948 if (*signature_ptr == NULL)
2949 return JVMTI_ERROR_OUT_OF_MEMORY;
2950 strcpy(*signature_ptr, fieldSignature);
2951 }
2952 if (generic_ptr != NULL) {
2953 *generic_ptr = NULL;
2954 Symbol* soop = fdesc_ptr->generic_signature();
2955 if (soop != NULL) {
2956 const char* gen_sig = soop->as_C_string();
2957 if (gen_sig != NULL) {
2958 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2959 if (err != JVMTI_ERROR_NONE) {
2960 return err;
2961 }
2962 strcpy(*generic_ptr, gen_sig);
2963 }
2964 }
2965 }
2966 return JVMTI_ERROR_NONE;
2967 } /* end GetFieldName */
2968
2969
2970 // declaring_class_ptr - pre-checked for NULL
2971 jvmtiError
2972 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2973
2974 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2975 return JVMTI_ERROR_NONE;
2976 } /* end GetFieldDeclaringClass */
2977
2978
2979 // modifiers_ptr - pre-checked for NULL
2980 jvmtiError
2981 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2982
2983 AccessFlags resultFlags = fdesc_ptr->access_flags();
2984 jint result = resultFlags.as_int();
2985 *modifiers_ptr = result;
2986
2987 return JVMTI_ERROR_NONE;
2988 } /* end GetFieldModifiers */
2989
2990
2991 // is_synthetic_ptr - pre-checked for NULL
2992 jvmtiError
2993 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2994 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2995 return JVMTI_ERROR_NONE;
2996 } /* end IsFieldSynthetic */
2997
2998
2999 //
3000 // Method functions
3001 //
3002
3003 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3004 // name_ptr - NULL is a valid value, must be checked
3005 // signature_ptr - NULL is a valid value, must be checked
3006 // generic_ptr - NULL is a valid value, must be checked
3007 jvmtiError
3008 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
3009 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3010 JavaThread* current_thread = JavaThread::current();
3011
3012 ResourceMark rm(current_thread); // get the utf8 name and signature
3013 if (name_ptr == NULL) {
3014 // just don't return the name
3015 } else {
3016 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
3017 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3018 strcpy(*name_ptr, utf8_name);
3019 }
3020 if (signature_ptr == NULL) {
3021 // just don't return the signature
3022 } else {
3023 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
3024 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
3025 strcpy(*signature_ptr, utf8_signature);
3026 }
3027
3028 if (generic_ptr != NULL) {
3029 *generic_ptr = NULL;
3030 Symbol* soop = method_oop->generic_signature();
3031 if (soop != NULL) {
3032 const char* gen_sig = soop->as_C_string();
3033 if (gen_sig != NULL) {
3034 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
3035 if (err != JVMTI_ERROR_NONE) {
3036 return err;
3037 }
3038 strcpy(*generic_ptr, gen_sig);
3039 }
3040 }
3041 }
3042 return JVMTI_ERROR_NONE;
3043 } /* end GetMethodName */
3044
3045
3046 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3047 // declaring_class_ptr - pre-checked for NULL
3048 jvmtiError
3049 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
3050 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3051 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
3052 return JVMTI_ERROR_NONE;
3053 } /* end GetMethodDeclaringClass */
3054
3055
3056 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3057 // modifiers_ptr - pre-checked for NULL
3058 jvmtiError
3059 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
3060 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3061 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
3062 return JVMTI_ERROR_NONE;
3063 } /* end GetMethodModifiers */
3064
3065
3066 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3067 // max_ptr - pre-checked for NULL
3068 jvmtiError
3069 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
3070 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3071 // get max stack
3072 (*max_ptr) = method_oop->max_locals();
3073 return JVMTI_ERROR_NONE;
3074 } /* end GetMaxLocals */
3075
3076
3077 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3078 // size_ptr - pre-checked for NULL
3079 jvmtiError
3080 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3081 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3082 // get size of arguments
3083
3084 (*size_ptr) = method_oop->size_of_parameters();
3085 return JVMTI_ERROR_NONE;
3086 } /* end GetArgumentsSize */
3087
3088
3089 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3090 // entry_count_ptr - pre-checked for NULL
3091 // table_ptr - pre-checked for NULL
3092 jvmtiError
3093 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3094 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3095 if (!method_oop->has_linenumber_table()) {
3096 return (JVMTI_ERROR_ABSENT_INFORMATION);
3097 }
3098
3099 // The line number table is compressed so we don't know how big it is until decompressed.
3100 // Decompression is really fast so we just do it twice.
3101
3102 // Compute size of table
3103 jint num_entries = 0;
3104 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3105 while (stream.read_pair()) {
3106 num_entries++;
3107 }
3108 jvmtiLineNumberEntry *jvmti_table =
3109 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3110
3111 // Fill jvmti table
3112 if (num_entries > 0) {
3113 int index = 0;
3114 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3115 while (stream.read_pair()) {
3116 jvmti_table[index].start_location = (jlocation) stream.bci();
3117 jvmti_table[index].line_number = (jint) stream.line();
3118 index++;
3119 }
3120 assert(index == num_entries, "sanity check");
3121 }
3122
3123 // Set up results
3124 (*entry_count_ptr) = num_entries;
3125 (*table_ptr) = jvmti_table;
3126
3127 return JVMTI_ERROR_NONE;
3128 } /* end GetLineNumberTable */
3129
3130
3131 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3132 // start_location_ptr - pre-checked for NULL
3133 // end_location_ptr - pre-checked for NULL
3134 jvmtiError
3135 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3136
3137 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3138 // get start and end location
3139 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3140 if (method_oop->code_size() == 0) {
3141 // there is no code so there is no start location
3142 (*start_location_ptr) = (jlocation)(-1);
3143 } else {
3144 (*start_location_ptr) = (jlocation)(0);
3145 }
3146
3147 return JVMTI_ERROR_NONE;
3148 } /* end GetMethodLocation */
3149
3150
3151 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3152 // entry_count_ptr - pre-checked for NULL
3153 // table_ptr - pre-checked for NULL
3154 jvmtiError
3155 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3156
3157 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3158 JavaThread* current_thread = JavaThread::current();
3159
3160 // does the klass have any local variable information?
3161 InstanceKlass* ik = method_oop->method_holder();
3162 if (!ik->access_flags().has_localvariable_table()) {
3163 return (JVMTI_ERROR_ABSENT_INFORMATION);
3164 }
3165
3166 ConstantPool* constants = method_oop->constants();
3167 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3168
3169 // in the vm localvariable table representation, 6 consecutive elements in the table
3170 // represent a 6-tuple of shorts
3171 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3172 jint num_entries = method_oop->localvariable_table_length();
3173 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3174 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3175
3176 if (num_entries > 0) {
3177 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3178 for (int i = 0; i < num_entries; i++) {
3179 // get the 5 tuple information from the vm table
3180 jlocation start_location = (jlocation) table[i].start_bci;
3181 jint length = (jint) table[i].length;
3182 int name_index = (int) table[i].name_cp_index;
3183 int signature_index = (int) table[i].descriptor_cp_index;
3184 int generic_signature_index = (int) table[i].signature_cp_index;
3185 jint slot = (jint) table[i].slot;
3186
3187 // get utf8 name and signature
3188 char *name_buf = NULL;
3189 char *sig_buf = NULL;
3190 char *gen_sig_buf = NULL;
3191 {
3192 ResourceMark rm(current_thread);
3193
3194 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3195 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3196 strcpy(name_buf, utf8_name);
3197
3198 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3199 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3200 strcpy(sig_buf, utf8_signature);
3201
3202 if (generic_signature_index > 0) {
3203 const char *utf8_gen_sign = (const char *)
3204 constants->symbol_at(generic_signature_index)->as_utf8();
3205 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3206 strcpy(gen_sig_buf, utf8_gen_sign);
3207 }
3208 }
3209
3210 // fill in the jvmti local variable table
3211 jvmti_table[i].start_location = start_location;
3212 jvmti_table[i].length = length;
3213 jvmti_table[i].name = name_buf;
3214 jvmti_table[i].signature = sig_buf;
3215 jvmti_table[i].generic_signature = gen_sig_buf;
3216 jvmti_table[i].slot = slot;
3217 }
3218 }
3219
3220 // set results
3221 (*entry_count_ptr) = num_entries;
3222 (*table_ptr) = jvmti_table;
3223
3224 return JVMTI_ERROR_NONE;
3225 } /* end GetLocalVariableTable */
3226
3227
3228 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3229 // bytecode_count_ptr - pre-checked for NULL
3230 // bytecodes_ptr - pre-checked for NULL
3231 jvmtiError
3232 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3233 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3234
3235 HandleMark hm;
3236 methodHandle method(method_oop);
3237 jint size = (jint)method->code_size();
3238 jvmtiError err = allocate(size, bytecodes_ptr);
3239 if (err != JVMTI_ERROR_NONE) {
3240 return err;
3241 }
3242
3243 (*bytecode_count_ptr) = size;
3244 // get byte codes
3245 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3246
3247 return JVMTI_ERROR_NONE;
3248 } /* end GetBytecodes */
3249
3250
3251 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3252 // is_native_ptr - pre-checked for NULL
3253 jvmtiError
3254 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3255 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3256 (*is_native_ptr) = method_oop->is_native();
3257 return JVMTI_ERROR_NONE;
3258 } /* end IsMethodNative */
3259
3260
3261 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3262 // is_synthetic_ptr - pre-checked for NULL
3263 jvmtiError
3264 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3265 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3266 (*is_synthetic_ptr) = method_oop->is_synthetic();
3267 return JVMTI_ERROR_NONE;
3268 } /* end IsMethodSynthetic */
3269
3270
3271 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3272 // is_obsolete_ptr - pre-checked for NULL
3273 jvmtiError
3274 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3275 if (use_version_1_0_semantics() &&
3276 get_capabilities()->can_redefine_classes == 0) {
3277 // This JvmtiEnv requested version 1.0 semantics and this function
3278 // requires the can_redefine_classes capability in version 1.0 so
3279 // we need to return an error here.
3280 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3281 }
3282
3283 if (method_oop == NULL || method_oop->is_obsolete()) {
3284 *is_obsolete_ptr = true;
3285 } else {
3286 *is_obsolete_ptr = false;
3287 }
3288 return JVMTI_ERROR_NONE;
3289 } /* end IsMethodObsolete */
3290
3291 //
3292 // Raw Monitor functions
3293 //
3294
3295 // name - pre-checked for NULL
3296 // monitor_ptr - pre-checked for NULL
3297 jvmtiError
3298 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3299 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3300 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3301
3302 *monitor_ptr = (jrawMonitorID)rmonitor;
3303
3304 return JVMTI_ERROR_NONE;
3305 } /* end CreateRawMonitor */
3306
3307
3308 // rmonitor - pre-checked for validity
3309 jvmtiError
3310 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3311 if (Threads::number_of_threads() == 0) {
3312 // Remove this monitor from pending raw monitors list
3313 // if it has entered in onload or start phase.
3314 JvmtiPendingMonitors::destroy(rmonitor);
3315 } else {
3316 Thread* thread = Thread::current();
3317 if (rmonitor->is_entered(thread)) {
3318 // The caller owns this monitor which we are about to destroy.
3319 // We exit the underlying synchronization object so that the
3320 // "delete monitor" call below can work without an assertion
3321 // failure on systems that don't like destroying synchronization
3322 // objects that are locked.
3323 int r;
3324 intptr_t recursion = rmonitor->recursions();
3325 for (intptr_t i=0; i <= recursion; i++) {
3326 r = rmonitor->raw_exit(thread);
3327 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3328 if (r != ObjectMonitor::OM_OK) { // robustness
3329 return JVMTI_ERROR_INTERNAL;
3330 }
3331 }
3332 }
3333 if (rmonitor->owner() != NULL) {
3334 // The caller is trying to destroy a monitor that is locked by
3335 // someone else. While this is not forbidden by the JVMTI
3336 // spec, it will cause an assertion failure on systems that don't
3337 // like destroying synchronization objects that are locked.
3338 // We indicate a problem with the error return (and leak the
3339 // monitor's memory).
3340 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3341 }
3342 }
3343
3344 delete rmonitor;
3345
3346 return JVMTI_ERROR_NONE;
3347 } /* end DestroyRawMonitor */
3348
3349
3350 // rmonitor - pre-checked for validity
3351 jvmtiError
3352 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3353 if (Threads::number_of_threads() == 0) {
3354 // No JavaThreads exist so ObjectMonitor enter cannot be
3355 // used, add this raw monitor to the pending list.
3356 // The pending monitors will be actually entered when
3357 // the VM is setup.
3358 // See transition_pending_raw_monitors in create_vm()
3359 // in thread.cpp.
3360 JvmtiPendingMonitors::enter(rmonitor);
3361 } else {
3362 int r = 0;
3363 Thread* thread = Thread::current();
3364
3365 if (thread->is_Java_thread()) {
3366 JavaThread* current_thread = (JavaThread*)thread;
3367
3368 #ifdef PROPER_TRANSITIONS
3369 // Not really unknown but ThreadInVMfromNative does more than we want
3370 ThreadInVMfromUnknown __tiv;
3371 {
3372 ThreadBlockInVM __tbivm(current_thread);
3373 r = rmonitor->raw_enter(current_thread);
3374 }
3375 #else
3376 /* Transition to thread_blocked without entering vm state */
3377 /* This is really evil. Normally you can't undo _thread_blocked */
3378 /* transitions like this because it would cause us to miss a */
3379 /* safepoint but since the thread was already in _thread_in_native */
3380 /* the thread is not leaving a safepoint safe state and it will */
3381 /* block when it tries to return from native. We can't safepoint */
3382 /* block in here because we could deadlock the vmthread. Blech. */
3383
3384 JavaThreadState state = current_thread->thread_state();
3385 assert(state == _thread_in_native, "Must be _thread_in_native");
3386 // frame should already be walkable since we are in native
3387 assert(!current_thread->has_last_Java_frame() ||
3388 current_thread->frame_anchor()->walkable(), "Must be walkable");
3389 current_thread->set_thread_state(_thread_blocked);
3390
3391 r = rmonitor->raw_enter(current_thread);
3392 // restore state, still at a safepoint safe state
3393 current_thread->set_thread_state(state);
3394
3395 #endif /* PROPER_TRANSITIONS */
3396 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3397 } else {
3398 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3399 r = rmonitor->raw_enter(thread);
3400 } else {
3401 ShouldNotReachHere();
3402 }
3403 }
3404
3405 if (r != ObjectMonitor::OM_OK) { // robustness
3406 return JVMTI_ERROR_INTERNAL;
3407 }
3408 }
3409 return JVMTI_ERROR_NONE;
3410 } /* end RawMonitorEnter */
3411
3412
3413 // rmonitor - pre-checked for validity
3414 jvmtiError
3415 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3416 jvmtiError err = JVMTI_ERROR_NONE;
3417
3418 if (Threads::number_of_threads() == 0) {
3419 // No JavaThreads exist so just remove this monitor from the pending list.
3420 // Bool value from exit is false if rmonitor is not in the list.
3421 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3422 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3423 }
3424 } else {
3425 int r = 0;
3426 Thread* thread = Thread::current();
3427
3428 if (thread->is_Java_thread()) {
3429 JavaThread* current_thread = (JavaThread*)thread;
3430 #ifdef PROPER_TRANSITIONS
3431 // Not really unknown but ThreadInVMfromNative does more than we want
3432 ThreadInVMfromUnknown __tiv;
3433 #endif /* PROPER_TRANSITIONS */
3434 r = rmonitor->raw_exit(current_thread);
3435 } else {
3436 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3437 r = rmonitor->raw_exit(thread);
3438 } else {
3439 ShouldNotReachHere();
3440 }
3441 }
3442
3443 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3444 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3445 } else {
3446 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3447 if (r != ObjectMonitor::OM_OK) { // robustness
3448 err = JVMTI_ERROR_INTERNAL;
3449 }
3450 }
3451 }
3452 return err;
3453 } /* end RawMonitorExit */
3454
3455
3456 // rmonitor - pre-checked for validity
3457 jvmtiError
3458 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3459 int r = 0;
3460 Thread* thread = Thread::current();
3461
3462 if (thread->is_Java_thread()) {
3463 JavaThread* current_thread = (JavaThread*)thread;
3464 #ifdef PROPER_TRANSITIONS
3465 // Not really unknown but ThreadInVMfromNative does more than we want
3466 ThreadInVMfromUnknown __tiv;
3467 {
3468 ThreadBlockInVM __tbivm(current_thread);
3469 r = rmonitor->raw_wait(millis, true, current_thread);
3470 }
3471 #else
3472 /* Transition to thread_blocked without entering vm state */
3473 /* This is really evil. Normally you can't undo _thread_blocked */
3474 /* transitions like this because it would cause us to miss a */
3475 /* safepoint but since the thread was already in _thread_in_native */
3476 /* the thread is not leaving a safepoint safe state and it will */
3477 /* block when it tries to return from native. We can't safepoint */
3478 /* block in here because we could deadlock the vmthread. Blech. */
3479
3480 JavaThreadState state = current_thread->thread_state();
3481 assert(state == _thread_in_native, "Must be _thread_in_native");
3482 // frame should already be walkable since we are in native
3483 assert(!current_thread->has_last_Java_frame() ||
3484 current_thread->frame_anchor()->walkable(), "Must be walkable");
3485 current_thread->set_thread_state(_thread_blocked);
3486
3487 r = rmonitor->raw_wait(millis, true, current_thread);
3488 // restore state, still at a safepoint safe state
3489 current_thread->set_thread_state(state);
3490
3491 #endif /* PROPER_TRANSITIONS */
3492 } else {
3493 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3494 r = rmonitor->raw_wait(millis, true, thread);
3495 } else {
3496 ShouldNotReachHere();
3497 }
3498 }
3499
3500 switch (r) {
3501 case ObjectMonitor::OM_INTERRUPTED:
3502 return JVMTI_ERROR_INTERRUPT;
3503 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3504 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3505 }
3506 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3507 if (r != ObjectMonitor::OM_OK) { // robustness
3508 return JVMTI_ERROR_INTERNAL;
3509 }
3510
3511 return JVMTI_ERROR_NONE;
3512 } /* end RawMonitorWait */
3513
3514
3515 // rmonitor - pre-checked for validity
3516 jvmtiError
3517 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3518 int r = 0;
3519 Thread* thread = Thread::current();
3520
3521 if (thread->is_Java_thread()) {
3522 JavaThread* current_thread = (JavaThread*)thread;
3523 // Not really unknown but ThreadInVMfromNative does more than we want
3524 ThreadInVMfromUnknown __tiv;
3525 r = rmonitor->raw_notify(current_thread);
3526 } else {
3527 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3528 r = rmonitor->raw_notify(thread);
3529 } else {
3530 ShouldNotReachHere();
3531 }
3532 }
3533
3534 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3535 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3536 }
3537 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3538 if (r != ObjectMonitor::OM_OK) { // robustness
3539 return JVMTI_ERROR_INTERNAL;
3540 }
3541
3542 return JVMTI_ERROR_NONE;
3543 } /* end RawMonitorNotify */
3544
3545
3546 // rmonitor - pre-checked for validity
3547 jvmtiError
3548 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3549 int r = 0;
3550 Thread* thread = Thread::current();
3551
3552 if (thread->is_Java_thread()) {
3553 JavaThread* current_thread = (JavaThread*)thread;
3554 ThreadInVMfromUnknown __tiv;
3555 r = rmonitor->raw_notifyAll(current_thread);
3556 } else {
3557 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3558 r = rmonitor->raw_notifyAll(thread);
3559 } else {
3560 ShouldNotReachHere();
3561 }
3562 }
3563
3564 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3565 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3566 }
3567 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3568 if (r != ObjectMonitor::OM_OK) { // robustness
3569 return JVMTI_ERROR_INTERNAL;
3570 }
3571
3572 return JVMTI_ERROR_NONE;
3573 } /* end RawMonitorNotifyAll */
3574
3575
3576 //
3577 // JNI Function Interception functions
3578 //
3579
3580
3581 // function_table - pre-checked for NULL
3582 jvmtiError
3583 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3584 // Copy jni function table at safepoint.
3585 VM_JNIFunctionTableCopier copier(function_table);
3586 VMThread::execute(&copier);
3587
3588 return JVMTI_ERROR_NONE;
3589 } /* end SetJNIFunctionTable */
3590
3591
3592 // function_table - pre-checked for NULL
3593 jvmtiError
3594 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3595 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3596 if (*function_table == NULL)
3597 return JVMTI_ERROR_OUT_OF_MEMORY;
3598 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3599 return JVMTI_ERROR_NONE;
3600 } /* end GetJNIFunctionTable */
3601
3602
3603 //
3604 // Event Management functions
3605 //
3606
3607 jvmtiError
3608 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3609 // can only generate two event types
3610 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3611 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3612 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3613 }
3614
3615 // for compiled_method_load events we must check that the environment
3616 // has the can_generate_compiled_method_load_events capability.
3617 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3618 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3619 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3620 }
3621 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3622 } else {
3623 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3624 }
3625
3626 } /* end GenerateEvents */
3627
3628
3629 //
3630 // Extension Mechanism functions
3631 //
3632
3633 // extension_count_ptr - pre-checked for NULL
3634 // extensions - pre-checked for NULL
3635 jvmtiError
3636 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3637 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3638 } /* end GetExtensionFunctions */
3639
3640
3641 // extension_count_ptr - pre-checked for NULL
3642 // extensions - pre-checked for NULL
3643 jvmtiError
3644 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3645 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3646 } /* end GetExtensionEvents */
3647
3648
3649 // callback - NULL is a valid value, must be checked
3650 jvmtiError
3651 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3652 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3653 } /* end SetExtensionEventCallback */
3654
3655 //
3656 // Timers functions
3657 //
3658
3659 // info_ptr - pre-checked for NULL
3660 jvmtiError
3661 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3662 os::current_thread_cpu_time_info(info_ptr);
3663 return JVMTI_ERROR_NONE;
3664 } /* end GetCurrentThreadCpuTimerInfo */
3665
3666
3667 // nanos_ptr - pre-checked for NULL
3668 jvmtiError
3669 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3670 *nanos_ptr = os::current_thread_cpu_time();
3671 return JVMTI_ERROR_NONE;
3672 } /* end GetCurrentThreadCpuTime */
3673
3674
3675 // info_ptr - pre-checked for NULL
3676 jvmtiError
3677 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3678 os::thread_cpu_time_info(info_ptr);
3679 return JVMTI_ERROR_NONE;
3680 } /* end GetThreadCpuTimerInfo */
3681
3682
3683 // Threads_lock NOT held, java_thread not protected by lock
3684 // java_thread - pre-checked
3685 // nanos_ptr - pre-checked for NULL
3686 jvmtiError
3687 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3688 *nanos_ptr = os::thread_cpu_time(java_thread);
3689 return JVMTI_ERROR_NONE;
3690 } /* end GetThreadCpuTime */
3691
3692
3693 // info_ptr - pre-checked for NULL
3694 jvmtiError
3695 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3696 os::javaTimeNanos_info(info_ptr);
3697 return JVMTI_ERROR_NONE;
3698 } /* end GetTimerInfo */
3699
3700
3701 // nanos_ptr - pre-checked for NULL
3702 jvmtiError
3703 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3704 *nanos_ptr = os::javaTimeNanos();
3705 return JVMTI_ERROR_NONE;
3706 } /* end GetTime */
3707
3708
3709 // processor_count_ptr - pre-checked for NULL
3710 jvmtiError
3711 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3712 *processor_count_ptr = os::active_processor_count();
3713 return JVMTI_ERROR_NONE;
3714 } /* end GetAvailableProcessors */
3715
3716 //
3717 // System Properties functions
3718 //
3719
3720 // count_ptr - pre-checked for NULL
3721 // property_ptr - pre-checked for NULL
3722 jvmtiError
3723 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3724 jvmtiError err = JVMTI_ERROR_NONE;
3725
3726 // Get the number of readable properties.
3727 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3728
3729 // Allocate memory to hold the exact number of readable properties.
3730 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3731 if (err != JVMTI_ERROR_NONE) {
3732 return err;
3733 }
3734 int readable_count = 0;
3735 // Loop through the system properties until all the readable properties are found.
3736 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3737 if (p->is_readable()) {
3738 const char *key = p->key();
3739 char **tmp_value = *property_ptr+readable_count;
3740 readable_count++;
3741 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3742 if (err == JVMTI_ERROR_NONE) {
3743 strcpy(*tmp_value, key);
3744 } else {
3745 // clean up previously allocated memory.
3746 for (int j=0; j<readable_count; j++) {
3747 Deallocate((unsigned char*)*property_ptr+j);
3748 }
3749 Deallocate((unsigned char*)property_ptr);
3750 break;
3751 }
3752 }
3753 }
3754 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3755 return err;
3756 } /* end GetSystemProperties */
3757
3758
3759 // property - pre-checked for NULL
3760 // value_ptr - pre-checked for NULL
3761 jvmtiError
3762 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3763 jvmtiError err = JVMTI_ERROR_NONE;
3764 const char *value;
3765
3766 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3767 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3768 if (value == NULL) {
3769 err = JVMTI_ERROR_NOT_AVAILABLE;
3770 } else {
3771 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3772 if (err == JVMTI_ERROR_NONE) {
3773 strcpy(*value_ptr, value);
3774 }
3775 }
3776 return err;
3777 } /* end GetSystemProperty */
3778
3779
3780 // property - pre-checked for NULL
3781 // value - NULL is a valid value, must be checked
3782 jvmtiError
3783 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3784 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3785
3786 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3787 if (strcmp(property, p->key()) == 0) {
3788 if (p->set_writeable_value(value_ptr)) {
3789 err = JVMTI_ERROR_NONE;
3790 }
3791 }
3792 }
3793 return err;
3794 } /* end SetSystemProperty */