1 /*
2 * Copyright (c) 2003, 2018, 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/jvmtiImpl.hpp"
50 #include "prims/jvmtiManageCapabilities.hpp"
51 #include "prims/jvmtiRawMonitor.hpp"
52 #include "prims/jvmtiRedefineClasses.hpp"
53 #include "prims/jvmtiTagMap.hpp"
54 #include "prims/jvmtiThreadState.inline.hpp"
55 #include "prims/jvmtiUtil.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/interfaceSupport.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/jfieldIDWorkaround.hpp"
61 #include "runtime/jniHandles.inline.hpp"
62 #include "runtime/osThread.hpp"
63 #include "runtime/reflectionUtils.hpp"
64 #include "runtime/signature.hpp"
65 #include "runtime/thread.inline.hpp"
66 #include "runtime/threadSMR.hpp"
67 #include "runtime/timerTrace.hpp"
68 #include "runtime/vframe.hpp"
69 #include "runtime/vmThread.hpp"
70 #include "services/threadService.hpp"
71 #include "utilities/exceptions.hpp"
72 #include "utilities/preserveException.hpp"
73
74
75 #define FIXLATER 0 // REMOVE this when completed.
76
77 // FIXLATER: hook into JvmtiTrace
78 #define TraceJVMTICalls false
79
80 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
81 }
82
83 JvmtiEnv::~JvmtiEnv() {
84 }
85
86 JvmtiEnv*
87 JvmtiEnv::create_a_jvmti(jint version) {
88 return new JvmtiEnv(version);
89 }
90
91 // VM operation class to copy jni function table at safepoint.
92 // More than one java threads or jvmti agents may be reading/
93 // modifying jni function tables. To reduce the risk of bad
94 // interaction b/w these threads it is copied at safepoint.
95 class VM_JNIFunctionTableCopier : public VM_Operation {
96 private:
97 const struct JNINativeInterface_ *_function_table;
98 public:
99 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
100 _function_table = func_tbl;
101 };
102
103 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
104 void doit() {
105 copy_jni_function_table(_function_table);
106 };
107 };
108
109 //
110 // Do not change the "prefix" marker below, everything above it is copied
111 // unchanged into the filled stub, everything below is controlled by the
112 // stub filler (only method bodies are carried forward, and then only for
113 // functionality still in the spec).
114 //
115 // end file prefix
116
117 //
118 // Memory Management functions
119 //
120
121 // mem_ptr - pre-checked for NULL
122 jvmtiError
123 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
124 return allocate(size, mem_ptr);
125 } /* end Allocate */
126
127
128 // mem - NULL is a valid value, must be checked
129 jvmtiError
130 JvmtiEnv::Deallocate(unsigned char* mem) {
131 return deallocate(mem);
132 } /* end Deallocate */
133
134 // Threads_lock NOT held, java_thread not protected by lock
135 // java_thread - pre-checked
136 // data - NULL is a valid value, must be checked
137 jvmtiError
138 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
139 JvmtiThreadState* state = java_thread->jvmti_thread_state();
140 if (state == NULL) {
141 if (data == NULL) {
142 // leaving state unset same as data set to NULL
143 return JVMTI_ERROR_NONE;
144 }
145 // otherwise, create the state
146 state = JvmtiThreadState::state_for(java_thread);
147 if (state == NULL) {
148 return JVMTI_ERROR_THREAD_NOT_ALIVE;
149 }
150 }
151 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
152 return JVMTI_ERROR_NONE;
153 } /* end SetThreadLocalStorage */
154
155
156 // Threads_lock NOT held
157 // thread - NOT pre-checked
158 // data_ptr - pre-checked for NULL
159 jvmtiError
160 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
161 JavaThread* current_thread = JavaThread::current();
162 if (thread == NULL) {
163 JvmtiThreadState* state = current_thread->jvmti_thread_state();
164 *data_ptr = (state == NULL) ? NULL :
165 state->env_thread_state(this)->get_agent_thread_local_storage_data();
166 } else {
167 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
168 // the thread to _thread_in_vm. However, when the TLS for a thread
169 // other than the current thread is required we need to transition
170 // from native so as to resolve the jthread.
171
172 ThreadInVMfromNative __tiv(current_thread);
173 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
174 debug_only(VMNativeEntryWrapper __vew;)
175
176 JavaThread* java_thread = NULL;
177 ThreadsListHandle tlh(current_thread);
178 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
179 if (err != JVMTI_ERROR_NONE) {
180 return err;
181 }
182
183 JvmtiThreadState* state = java_thread->jvmti_thread_state();
184 *data_ptr = (state == NULL) ? NULL :
185 state->env_thread_state(this)->get_agent_thread_local_storage_data();
186 }
187 return JVMTI_ERROR_NONE;
188 } /* end GetThreadLocalStorage */
189
190 //
191 // Module functions
192 //
193
194 // module_count_ptr - pre-checked for NULL
195 // modules_ptr - pre-checked for NULL
196 jvmtiError
197 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
198 JvmtiModuleClosure jmc;
199
200 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
201 } /* end GetAllModules */
202
203
204 // class_loader - NULL is a valid value, must be pre-checked
205 // package_name - pre-checked for NULL
206 // module_ptr - pre-checked for NULL
207 jvmtiError
208 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
209 JavaThread* THREAD = JavaThread::current(); // pass to macros
210 ResourceMark rm(THREAD);
211
212 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
213 // Check that loader is a subclass of java.lang.ClassLoader.
214 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
215 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
216 }
217 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
218 if (HAS_PENDING_EXCEPTION) {
219 CLEAR_PENDING_EXCEPTION;
220 return JVMTI_ERROR_INTERNAL; // unexpected exception
221 }
222 *module_ptr = module;
223 return JVMTI_ERROR_NONE;
224 } /* end GetNamedModule */
225
226
227 // module - pre-checked for NULL
228 // to_module - pre-checked for NULL
229 jvmtiError
230 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
231 JavaThread* THREAD = JavaThread::current();
232
233 // check module
234 Handle h_module(THREAD, JNIHandles::resolve(module));
235 if (!java_lang_Module::is_instance(h_module())) {
236 return JVMTI_ERROR_INVALID_MODULE;
237 }
238 // check to_module
239 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
240 if (!java_lang_Module::is_instance(h_to_module())) {
241 return JVMTI_ERROR_INVALID_MODULE;
242 }
243 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
244 } /* end AddModuleReads */
245
246
247 // module - pre-checked for NULL
248 // pkg_name - pre-checked for NULL
249 // to_module - pre-checked for NULL
250 jvmtiError
251 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
252 JavaThread* THREAD = JavaThread::current();
253 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
254
255 // check module
256 Handle h_module(THREAD, JNIHandles::resolve(module));
257 if (!java_lang_Module::is_instance(h_module())) {
258 return JVMTI_ERROR_INVALID_MODULE;
259 }
260 // check to_module
261 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
262 if (!java_lang_Module::is_instance(h_to_module())) {
263 return JVMTI_ERROR_INVALID_MODULE;
264 }
265 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
266 } /* end AddModuleExports */
267
268
269 // module - pre-checked for NULL
270 // pkg_name - pre-checked for NULL
271 // to_module - pre-checked for NULL
272 jvmtiError
273 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
274 JavaThread* THREAD = JavaThread::current();
275 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
276
277 // check module
278 Handle h_module(THREAD, JNIHandles::resolve(module));
279 if (!java_lang_Module::is_instance(h_module())) {
280 return JVMTI_ERROR_INVALID_MODULE;
281 }
282 // check to_module
283 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
284 if (!java_lang_Module::is_instance(h_to_module())) {
285 return JVMTI_ERROR_INVALID_MODULE;
286 }
287 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
288 } /* end AddModuleOpens */
289
290
291 // module - pre-checked for NULL
292 // service - pre-checked for NULL
293 jvmtiError
294 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
295 JavaThread* THREAD = JavaThread::current();
296
297 // check module
298 Handle h_module(THREAD, JNIHandles::resolve(module));
299 if (!java_lang_Module::is_instance(h_module())) {
300 return JVMTI_ERROR_INVALID_MODULE;
301 }
302 // check service
303 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
304 if (!java_lang_Class::is_instance(h_service()) ||
305 java_lang_Class::is_primitive(h_service())) {
306 return JVMTI_ERROR_INVALID_CLASS;
307 }
308 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
309 } /* end AddModuleUses */
310
311
312 // module - pre-checked for NULL
313 // service - pre-checked for NULL
314 // impl_class - pre-checked for NULL
315 jvmtiError
316 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
317 JavaThread* THREAD = JavaThread::current();
318
319 // check module
320 Handle h_module(THREAD, JNIHandles::resolve(module));
321 if (!java_lang_Module::is_instance(h_module())) {
322 return JVMTI_ERROR_INVALID_MODULE;
323 }
324 // check service
325 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
326 if (!java_lang_Class::is_instance(h_service()) ||
327 java_lang_Class::is_primitive(h_service())) {
328 return JVMTI_ERROR_INVALID_CLASS;
329 }
330 // check impl_class
331 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
332 if (!java_lang_Class::is_instance(h_impl_class()) ||
333 java_lang_Class::is_primitive(h_impl_class())) {
334 return JVMTI_ERROR_INVALID_CLASS;
335 }
336 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
337 } /* end AddModuleProvides */
338
339 // module - pre-checked for NULL
340 // is_modifiable_class_ptr - pre-checked for NULL
341 jvmtiError
342 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
343 JavaThread* THREAD = JavaThread::current();
344
345 // check module
346 Handle h_module(THREAD, JNIHandles::resolve(module));
347 if (!java_lang_Module::is_instance(h_module())) {
348 return JVMTI_ERROR_INVALID_MODULE;
349 }
350
351 *is_modifiable_module_ptr = JNI_TRUE;
352 return JVMTI_ERROR_NONE;
353 } /* end IsModifiableModule */
354
355
356 //
357 // Class functions
358 //
359
360 // class_count_ptr - pre-checked for NULL
361 // classes_ptr - pre-checked for NULL
362 jvmtiError
363 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
364 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
365 } /* end GetLoadedClasses */
366
367
368 // initiating_loader - NULL is a valid value, must be checked
369 // class_count_ptr - pre-checked for NULL
370 // classes_ptr - pre-checked for NULL
371 jvmtiError
372 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
373 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
374 class_count_ptr, classes_ptr);
375 } /* end GetClassLoaderClasses */
376
377 // k_mirror - may be primitive, this must be checked
378 // is_modifiable_class_ptr - pre-checked for NULL
379 jvmtiError
380 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
381 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
382 JNI_TRUE : JNI_FALSE;
383 return JVMTI_ERROR_NONE;
384 } /* end IsModifiableClass */
385
386 // class_count - pre-checked to be greater than or equal to 0
387 // classes - pre-checked for NULL
388 jvmtiError
389 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
390 //TODO: add locking
391
392 int index;
393 JavaThread* current_thread = JavaThread::current();
394 ResourceMark rm(current_thread);
395
396 jvmtiClassDefinition* class_definitions =
397 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
398 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
399
400 for (index = 0; index < class_count; index++) {
401 HandleMark hm(current_thread);
402
403 jclass jcls = classes[index];
404 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
405 if (k_mirror == NULL) {
406 return JVMTI_ERROR_INVALID_CLASS;
407 }
408 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
409 return JVMTI_ERROR_INVALID_CLASS;
410 }
411
412 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
413 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
414 }
415
416 Klass* klass = java_lang_Class::as_Klass(k_mirror);
417
418 jint status = klass->jvmti_class_status();
419 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
420 return JVMTI_ERROR_INVALID_CLASS;
421 }
422
423 InstanceKlass* ik = InstanceKlass::cast(klass);
424 if (ik->get_cached_class_file_bytes() == NULL) {
425 // Not cached, we need to reconstitute the class file from the
426 // VM representation. We don't attach the reconstituted class
427 // bytes to the InstanceKlass here because they have not been
428 // validated and we're not at a safepoint.
429 JvmtiClassFileReconstituter reconstituter(ik);
430 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
431 return reconstituter.get_error();
432 }
433
434 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
435 class_definitions[index].class_bytes = (unsigned char*)
436 reconstituter.class_file_bytes();
437 } else {
438 // it is cached, get it from the cache
439 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
440 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
441 }
442 class_definitions[index].klass = jcls;
443 }
444 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
445 VMThread::execute(&op);
446 return (op.check_error());
447 } /* end RetransformClasses */
448
449
450 // class_count - pre-checked to be greater than or equal to 0
451 // class_definitions - pre-checked for NULL
452 jvmtiError
453 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
454 //TODO: add locking
455 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
456 VMThread::execute(&op);
457 return (op.check_error());
458 } /* end RedefineClasses */
459
460
461 //
462 // Object functions
463 //
464
465 // size_ptr - pre-checked for NULL
466 jvmtiError
467 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
468 oop mirror = JNIHandles::resolve_external_guard(object);
469 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
470 *size_ptr = (jlong)mirror->size() * wordSize;
471 return JVMTI_ERROR_NONE;
472 } /* end GetObjectSize */
473
474 //
475 // Method functions
476 //
477
478 // prefix - NULL is a valid value, must be checked
479 jvmtiError
480 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
481 return prefix == NULL?
482 SetNativeMethodPrefixes(0, NULL) :
483 SetNativeMethodPrefixes(1, (char**)&prefix);
484 } /* end SetNativeMethodPrefix */
485
486
487 // prefix_count - pre-checked to be greater than or equal to 0
488 // prefixes - pre-checked for NULL
489 jvmtiError
490 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
491 // Have to grab JVMTI thread state lock to be sure that some thread
492 // isn't accessing the prefixes at the same time we are setting them.
493 // No locks during VM bring-up.
494 if (Threads::number_of_threads() == 0) {
495 return set_native_method_prefixes(prefix_count, prefixes);
496 } else {
497 MutexLocker mu(JvmtiThreadState_lock);
498 return set_native_method_prefixes(prefix_count, prefixes);
499 }
500 } /* end SetNativeMethodPrefixes */
501
502 //
503 // Event Management functions
504 //
505
506 // callbacks - NULL is a valid value, must be checked
507 // size_of_callbacks - pre-checked to be greater than or equal to 0
508 jvmtiError
509 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
510 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
511 return JVMTI_ERROR_NONE;
512 } /* end SetEventCallbacks */
513
514
515 // event_thread - NULL is a valid value, must be checked
516 jvmtiError
517 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
518 if (event_thread == NULL) {
519 // Can be called at Agent_OnLoad() time with event_thread == NULL
520 // when Thread::current() does not work yet so we cannot create a
521 // ThreadsListHandle that is common to both thread-specific and
522 // global code paths.
523
524 // event_type must be valid
525 if (!JvmtiEventController::is_valid_event_type(event_type)) {
526 return JVMTI_ERROR_INVALID_EVENT_TYPE;
527 }
528
529 bool enabled = (mode == JVMTI_ENABLE);
530
531 // assure that needed capabilities are present
532 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
533 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
534 }
535
536 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
537 record_class_file_load_hook_enabled();
538 }
539 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
540 } else {
541 // We have a specified event_thread.
542
543 JavaThread* java_thread = NULL;
544 ThreadsListHandle tlh;
545 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
546 if (err != JVMTI_ERROR_NONE) {
547 return err;
548 }
549
550 // event_type must be valid
551 if (!JvmtiEventController::is_valid_event_type(event_type)) {
552 return JVMTI_ERROR_INVALID_EVENT_TYPE;
553 }
554
555 // global events cannot be controlled at thread level.
556 if (JvmtiEventController::is_global_event(event_type)) {
557 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
558 }
559
560 bool enabled = (mode == JVMTI_ENABLE);
561
562 // assure that needed capabilities are present
563 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
564 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
565 }
566
567 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
568 record_class_file_load_hook_enabled();
569 }
570 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
571 }
572
573 return JVMTI_ERROR_NONE;
574 } /* end SetEventNotificationMode */
575
576 //
577 // Capability functions
578 //
579
580 // capabilities_ptr - pre-checked for NULL
581 jvmtiError
582 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
583 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
584 get_prohibited_capabilities(),
585 capabilities_ptr);
586 return JVMTI_ERROR_NONE;
587 } /* end GetPotentialCapabilities */
588
589
590 // capabilities_ptr - pre-checked for NULL
591 jvmtiError
592 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
593 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
594 get_prohibited_capabilities(),
595 capabilities_ptr,
596 get_capabilities());
597 } /* end AddCapabilities */
598
599
600 // capabilities_ptr - pre-checked for NULL
601 jvmtiError
602 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
603 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
604 return JVMTI_ERROR_NONE;
605 } /* end RelinquishCapabilities */
606
607
608 // capabilities_ptr - pre-checked for NULL
609 jvmtiError
610 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
611 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
612 return JVMTI_ERROR_NONE;
613 } /* end GetCapabilities */
614
615 //
616 // Class Loader Search functions
617 //
618
619 // segment - pre-checked for NULL
620 jvmtiError
621 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
622 jvmtiPhase phase = get_phase();
623 if (phase == JVMTI_PHASE_ONLOAD) {
624 Arguments::append_sysclasspath(segment);
625 return JVMTI_ERROR_NONE;
626 } else if (use_version_1_0_semantics()) {
627 // This JvmtiEnv requested version 1.0 semantics and this function
628 // is only allowed in the ONLOAD phase in version 1.0 so we need to
629 // return an error here.
630 return JVMTI_ERROR_WRONG_PHASE;
631 } else if (phase == JVMTI_PHASE_LIVE) {
632 // The phase is checked by the wrapper that called this function,
633 // but this thread could be racing with the thread that is
634 // terminating the VM so we check one more time.
635
636 // create the zip entry
637 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
638 if (zip_entry == NULL) {
639 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
640 }
641
642 // lock the loader
643 Thread* thread = Thread::current();
644 HandleMark hm;
645 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
646
647 ObjectLocker ol(loader_lock, thread);
648
649 // add the jar file to the bootclasspath
650 log_info(class, load)("opened: %s", zip_entry->name());
651 ClassLoaderExt::append_boot_classpath(zip_entry);
652 return JVMTI_ERROR_NONE;
653 } else {
654 return JVMTI_ERROR_WRONG_PHASE;
655 }
656
657 } /* end AddToBootstrapClassLoaderSearch */
658
659
660 // segment - pre-checked for NULL
661 jvmtiError
662 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
663 jvmtiPhase phase = get_phase();
664
665 if (phase == JVMTI_PHASE_ONLOAD) {
666 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
667 if (strcmp("java.class.path", p->key()) == 0) {
668 p->append_value(segment);
669 break;
670 }
671 }
672 return JVMTI_ERROR_NONE;
673 } else if (phase == JVMTI_PHASE_LIVE) {
674 // The phase is checked by the wrapper that called this function,
675 // but this thread could be racing with the thread that is
676 // terminating the VM so we check one more time.
677 HandleMark hm;
678
679 // create the zip entry (which will open the zip file and hence
680 // check that the segment is indeed a zip file).
681 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
682 if (zip_entry == NULL) {
683 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
684 }
685 delete zip_entry; // no longer needed
686
687 // lock the loader
688 Thread* THREAD = Thread::current();
689 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
690
691 ObjectLocker ol(loader, THREAD);
692
693 // need the path as java.lang.String
694 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
695 if (HAS_PENDING_EXCEPTION) {
696 CLEAR_PENDING_EXCEPTION;
697 return JVMTI_ERROR_INTERNAL;
698 }
699
700 // Invoke the appendToClassPathForInstrumentation method - if the method
701 // is not found it means the loader doesn't support adding to the class path
702 // in the live phase.
703 {
704 JavaValue res(T_VOID);
705 JavaCalls::call_special(&res,
706 loader,
707 loader->klass(),
708 vmSymbols::appendToClassPathForInstrumentation_name(),
709 vmSymbols::appendToClassPathForInstrumentation_signature(),
710 path,
711 THREAD);
712 if (HAS_PENDING_EXCEPTION) {
713 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
714 CLEAR_PENDING_EXCEPTION;
715
716 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
717 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
718 } else {
719 return JVMTI_ERROR_INTERNAL;
720 }
721 }
722 }
723
724 return JVMTI_ERROR_NONE;
725 } else {
726 return JVMTI_ERROR_WRONG_PHASE;
727 }
728 } /* end AddToSystemClassLoaderSearch */
729
730 //
731 // General functions
732 //
733
734 // phase_ptr - pre-checked for NULL
735 jvmtiError
736 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
737 *phase_ptr = phase();
738 return JVMTI_ERROR_NONE;
739 } /* end GetPhase */
740
741
742 jvmtiError
743 JvmtiEnv::DisposeEnvironment() {
744 dispose();
745 return JVMTI_ERROR_NONE;
746 } /* end DisposeEnvironment */
747
748
749 // data - NULL is a valid value, must be checked
750 jvmtiError
751 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
752 set_env_local_storage(data);
753 return JVMTI_ERROR_NONE;
754 } /* end SetEnvironmentLocalStorage */
755
756
757 // data_ptr - pre-checked for NULL
758 jvmtiError
759 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
760 *data_ptr = (void*)get_env_local_storage();
761 return JVMTI_ERROR_NONE;
762 } /* end GetEnvironmentLocalStorage */
763
764 // version_ptr - pre-checked for NULL
765 jvmtiError
766 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
767 *version_ptr = JVMTI_VERSION;
768 return JVMTI_ERROR_NONE;
769 } /* end GetVersionNumber */
770
771
772 // name_ptr - pre-checked for NULL
773 jvmtiError
774 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
775 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
776 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
777 }
778 const char *name = JvmtiUtil::error_name(error);
779 if (name == NULL) {
780 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
781 }
782 size_t len = strlen(name) + 1;
783 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
784 if (err == JVMTI_ERROR_NONE) {
785 memcpy(*name_ptr, name, len);
786 }
787 return err;
788 } /* end GetErrorName */
789
790
791 jvmtiError
792 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
793 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
794 switch (flag) {
795 case JVMTI_VERBOSE_OTHER:
796 // ignore
797 break;
798 case JVMTI_VERBOSE_CLASS:
799 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
800 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
801 break;
802 case JVMTI_VERBOSE_GC:
803 if (value == 0) {
804 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
805 } else {
806 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
807 }
808 break;
809 case JVMTI_VERBOSE_JNI:
810 PrintJNIResolving = value != 0;
811 break;
812 default:
813 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
814 };
815 return JVMTI_ERROR_NONE;
816 } /* end SetVerboseFlag */
817
818
819 // format_ptr - pre-checked for NULL
820 jvmtiError
821 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
822 *format_ptr = JVMTI_JLOCATION_JVMBCI;
823 return JVMTI_ERROR_NONE;
824 } /* end GetJLocationFormat */
825
826 //
827 // Thread functions
828 //
829
830 // Threads_lock NOT held
831 // thread - NOT pre-checked
832 // thread_state_ptr - pre-checked for NULL
833 jvmtiError
834 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
835 JavaThread* current_thread = JavaThread::current();
836 JavaThread* java_thread = NULL;
837 oop thread_oop = NULL;
838 ThreadsListHandle tlh(current_thread);
839
840 if (thread == NULL) {
841 java_thread = current_thread;
842 thread_oop = java_thread->threadObj();
843
844 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
845 return JVMTI_ERROR_INVALID_THREAD;
846 }
847 } else {
848 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
849 if (err != JVMTI_ERROR_NONE) {
850 // We got an error code so we don't have a JavaThread *, but
851 // only return an error from here if we didn't get a valid
852 // thread_oop.
853 if (thread_oop == NULL) {
854 return err;
855 }
856 // We have a valid thread_oop so we can return some thread state.
857 }
858 }
859
860 // get most state bits
861 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
862
863 if (java_thread != NULL) {
864 // We have a JavaThread* so add more state bits.
865 JavaThreadState jts = java_thread->thread_state();
866
867 if (java_thread->is_being_ext_suspended()) {
868 state |= JVMTI_THREAD_STATE_SUSPENDED;
869 }
870 if (jts == _thread_in_native) {
871 state |= JVMTI_THREAD_STATE_IN_NATIVE;
872 }
873 OSThread* osThread = java_thread->osthread();
874 if (osThread != NULL && osThread->interrupted()) {
875 state |= JVMTI_THREAD_STATE_INTERRUPTED;
876 }
877 }
878
879 *thread_state_ptr = state;
880 return JVMTI_ERROR_NONE;
881 } /* end GetThreadState */
882
883
884 // thread_ptr - pre-checked for NULL
885 jvmtiError
886 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
887 JavaThread* current_thread = JavaThread::current();
888 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
889 return JVMTI_ERROR_NONE;
890 } /* end GetCurrentThread */
891
892
893 // threads_count_ptr - pre-checked for NULL
894 // threads_ptr - pre-checked for NULL
895 jvmtiError
896 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
897 int nthreads = 0;
898 Handle *thread_objs = NULL;
899 ResourceMark rm;
900 HandleMark hm;
901
902 // enumerate threads (including agent threads)
903 ThreadsListEnumerator tle(Thread::current(), true);
904 nthreads = tle.num_threads();
905 *threads_count_ptr = nthreads;
906
907 if (nthreads == 0) {
908 *threads_ptr = NULL;
909 return JVMTI_ERROR_NONE;
910 }
911
912 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
913 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
914
915 for (int i=0; i < nthreads; i++) {
916 thread_objs[i] = Handle(tle.get_threadObj(i));
917 }
918
919 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
920 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
921
922 *threads_ptr = jthreads;
923 return JVMTI_ERROR_NONE;
924 } /* end GetAllThreads */
925
926
927 // Threads_lock NOT held, java_thread not protected by lock
928 // java_thread - pre-checked
929 jvmtiError
930 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
931 // don't allow hidden thread suspend request.
932 if (java_thread->is_hidden_from_external_view()) {
933 return (JVMTI_ERROR_NONE);
934 }
935
936 {
937 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
938 if (java_thread->is_external_suspend()) {
939 // don't allow nested external suspend requests.
940 return (JVMTI_ERROR_THREAD_SUSPENDED);
941 }
942 if (java_thread->is_exiting()) { // thread is in the process of exiting
943 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
944 }
945 java_thread->set_external_suspend();
946 }
947
948 if (!JvmtiSuspendControl::suspend(java_thread)) {
949 // the thread was in the process of exiting
950 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
951 }
952 return JVMTI_ERROR_NONE;
953 } /* end SuspendThread */
954
955
956 // request_count - pre-checked to be greater than or equal to 0
957 // request_list - pre-checked for NULL
958 // results - pre-checked for NULL
959 jvmtiError
960 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
961 int needSafepoint = 0; // > 0 if we need a safepoint
962 ThreadsListHandle tlh;
963 for (int i = 0; i < request_count; i++) {
964 JavaThread *java_thread = NULL;
965 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
966 if (err != JVMTI_ERROR_NONE) {
967 results[i] = err;
968 continue;
969 }
970 // don't allow hidden thread suspend request.
971 if (java_thread->is_hidden_from_external_view()) {
972 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
973 continue;
974 }
975
976 {
977 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
978 if (java_thread->is_external_suspend()) {
979 // don't allow nested external suspend requests.
980 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
981 continue;
982 }
983 if (java_thread->is_exiting()) { // thread is in the process of exiting
984 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
985 continue;
986 }
987 java_thread->set_external_suspend();
988 }
989 if (java_thread->thread_state() == _thread_in_native) {
990 // We need to try and suspend native threads here. Threads in
991 // other states will self-suspend on their next transition.
992 if (!JvmtiSuspendControl::suspend(java_thread)) {
993 // The thread was in the process of exiting. Force another
994 // safepoint to make sure that this thread transitions.
995 needSafepoint++;
996 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
997 continue;
998 }
999 } else {
1000 needSafepoint++;
1001 }
1002 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1003 }
1004 if (needSafepoint > 0) {
1005 VM_ThreadsSuspendJVMTI tsj;
1006 VMThread::execute(&tsj);
1007 }
1008 // per-thread suspend results returned via results parameter
1009 return JVMTI_ERROR_NONE;
1010 } /* end SuspendThreadList */
1011
1012
1013 // Threads_lock NOT held, java_thread not protected by lock
1014 // java_thread - pre-checked
1015 jvmtiError
1016 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1017 // don't allow hidden thread resume request.
1018 if (java_thread->is_hidden_from_external_view()) {
1019 return JVMTI_ERROR_NONE;
1020 }
1021
1022 if (!java_thread->is_being_ext_suspended()) {
1023 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1024 }
1025
1026 if (!JvmtiSuspendControl::resume(java_thread)) {
1027 return JVMTI_ERROR_INTERNAL;
1028 }
1029 return JVMTI_ERROR_NONE;
1030 } /* end ResumeThread */
1031
1032
1033 // request_count - pre-checked to be greater than or equal to 0
1034 // request_list - pre-checked for NULL
1035 // results - pre-checked for NULL
1036 jvmtiError
1037 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1038 ThreadsListHandle tlh;
1039 for (int i = 0; i < request_count; i++) {
1040 JavaThread* java_thread = NULL;
1041 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1042 if (err != JVMTI_ERROR_NONE) {
1043 results[i] = err;
1044 continue;
1045 }
1046 // don't allow hidden thread resume request.
1047 if (java_thread->is_hidden_from_external_view()) {
1048 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1049 continue;
1050 }
1051 if (!java_thread->is_being_ext_suspended()) {
1052 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1053 continue;
1054 }
1055
1056 if (!JvmtiSuspendControl::resume(java_thread)) {
1057 results[i] = JVMTI_ERROR_INTERNAL;
1058 continue;
1059 }
1060
1061 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1062 }
1063 // per-thread resume results returned via results parameter
1064 return JVMTI_ERROR_NONE;
1065 } /* end ResumeThreadList */
1066
1067
1068 // Threads_lock NOT held, java_thread not protected by lock
1069 // java_thread - pre-checked
1070 jvmtiError
1071 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1072 oop e = JNIHandles::resolve_external_guard(exception);
1073 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1074
1075 JavaThread::send_async_exception(java_thread->threadObj(), e);
1076
1077 return JVMTI_ERROR_NONE;
1078
1079 } /* end StopThread */
1080
1081
1082 // Threads_lock NOT held
1083 // thread - NOT pre-checked
1084 jvmtiError
1085 JvmtiEnv::InterruptThread(jthread thread) {
1086 // TODO: this is very similar to JVM_Interrupt(); share code in future
1087 JavaThread* current_thread = JavaThread::current();
1088 JavaThread* java_thread = NULL;
1089 ThreadsListHandle tlh(current_thread);
1090 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1091 if (err != JVMTI_ERROR_NONE) {
1092 return err;
1093 }
1094
1095 Thread::interrupt(java_thread);
1096
1097 return JVMTI_ERROR_NONE;
1098 } /* end InterruptThread */
1099
1100
1101 // Threads_lock NOT held
1102 // thread - NOT pre-checked
1103 // info_ptr - pre-checked for NULL
1104 jvmtiError
1105 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1106 ResourceMark rm;
1107 HandleMark hm;
1108
1109 JavaThread* current_thread = JavaThread::current();
1110 ThreadsListHandle tlh(current_thread);
1111
1112 // if thread is NULL the current thread is used
1113 oop thread_oop = NULL;
1114 if (thread == NULL) {
1115 thread_oop = current_thread->threadObj();
1116 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1117 return JVMTI_ERROR_INVALID_THREAD;
1118 }
1119 } else {
1120 JavaThread* java_thread = NULL;
1121 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1122 if (err != JVMTI_ERROR_NONE) {
1123 // We got an error code so we don't have a JavaThread *, but
1124 // only return an error from here if we didn't get a valid
1125 // thread_oop.
1126 if (thread_oop == NULL) {
1127 return err;
1128 }
1129 // We have a valid thread_oop so we can return some thread info.
1130 }
1131 }
1132
1133 Handle thread_obj(current_thread, thread_oop);
1134 Handle name;
1135 ThreadPriority priority;
1136 Handle thread_group;
1137 Handle context_class_loader;
1138 bool is_daemon;
1139
1140 { MutexLocker mu(Threads_lock);
1141
1142 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1143 priority = java_lang_Thread::priority(thread_obj());
1144 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1145 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1146
1147 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1148 context_class_loader = Handle(current_thread, loader);
1149 }
1150 { const char *n;
1151
1152 if (name() != NULL) {
1153 n = java_lang_String::as_utf8_string(name());
1154 } else {
1155 int utf8_length = 0;
1156 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1157 }
1158
1159 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1160 if (info_ptr->name == NULL)
1161 return JVMTI_ERROR_OUT_OF_MEMORY;
1162
1163 strcpy(info_ptr->name, n);
1164 }
1165 info_ptr->is_daemon = is_daemon;
1166 info_ptr->priority = priority;
1167
1168 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1169 jni_reference(context_class_loader);
1170 info_ptr->thread_group = jni_reference(thread_group);
1171
1172 return JVMTI_ERROR_NONE;
1173 } /* end GetThreadInfo */
1174
1175
1176 // Threads_lock NOT held, java_thread not protected by lock
1177 // java_thread - pre-checked
1178 // owned_monitor_count_ptr - pre-checked for NULL
1179 // owned_monitors_ptr - pre-checked for NULL
1180 jvmtiError
1181 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1182 jvmtiError err = JVMTI_ERROR_NONE;
1183 JavaThread* calling_thread = JavaThread::current();
1184
1185 // growable array of jvmti monitors info on the C-heap
1186 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1187 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1188
1189 // It is only safe to perform the direct operation on the current
1190 // thread. All other usage needs to use a vm-safepoint-op for safety.
1191 if (java_thread == calling_thread) {
1192 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1193 } else {
1194 // JVMTI get monitors info at safepoint. Do not require target thread to
1195 // be suspended.
1196 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1197 VMThread::execute(&op);
1198 err = op.result();
1199 }
1200 jint owned_monitor_count = owned_monitors_list->length();
1201 if (err == JVMTI_ERROR_NONE) {
1202 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1203 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1204 // copy into the returned array
1205 for (int i = 0; i < owned_monitor_count; i++) {
1206 (*owned_monitors_ptr)[i] =
1207 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1208 }
1209 *owned_monitor_count_ptr = owned_monitor_count;
1210 }
1211 }
1212 // clean up.
1213 for (int i = 0; i < owned_monitor_count; i++) {
1214 deallocate((unsigned char*)owned_monitors_list->at(i));
1215 }
1216 delete owned_monitors_list;
1217
1218 return err;
1219 } /* end GetOwnedMonitorInfo */
1220
1221
1222 // Threads_lock NOT held, java_thread not protected by lock
1223 // java_thread - pre-checked
1224 // monitor_info_count_ptr - pre-checked for NULL
1225 // monitor_info_ptr - pre-checked for NULL
1226 jvmtiError
1227 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1228 jvmtiError err = JVMTI_ERROR_NONE;
1229 JavaThread* calling_thread = JavaThread::current();
1230
1231 // growable array of jvmti monitors info on the C-heap
1232 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1233 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1234
1235 // It is only safe to perform the direct operation on the current
1236 // thread. All other usage needs to use a vm-safepoint-op for safety.
1237 if (java_thread == calling_thread) {
1238 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1239 } else {
1240 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1241 // be suspended.
1242 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1243 VMThread::execute(&op);
1244 err = op.result();
1245 }
1246
1247 jint owned_monitor_count = owned_monitors_list->length();
1248 if (err == JVMTI_ERROR_NONE) {
1249 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1250 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1251 // copy to output array.
1252 for (int i = 0; i < owned_monitor_count; i++) {
1253 (*monitor_info_ptr)[i].monitor =
1254 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1255 (*monitor_info_ptr)[i].stack_depth =
1256 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1257 }
1258 }
1259 *monitor_info_count_ptr = owned_monitor_count;
1260 }
1261
1262 // clean up.
1263 for (int i = 0; i < owned_monitor_count; i++) {
1264 deallocate((unsigned char*)owned_monitors_list->at(i));
1265 }
1266 delete owned_monitors_list;
1267
1268 return err;
1269 } /* end GetOwnedMonitorStackDepthInfo */
1270
1271
1272 // Threads_lock NOT held, java_thread not protected by lock
1273 // java_thread - pre-checked
1274 // monitor_ptr - pre-checked for NULL
1275 jvmtiError
1276 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1277 jvmtiError err = JVMTI_ERROR_NONE;
1278 JavaThread* calling_thread = JavaThread::current();
1279
1280 // It is only safe to perform the direct operation on the current
1281 // thread. All other usage needs to use a vm-safepoint-op for safety.
1282 if (java_thread == calling_thread) {
1283 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1284 } else {
1285 // get contended monitor information at safepoint.
1286 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1287 VMThread::execute(&op);
1288 err = op.result();
1289 }
1290 return err;
1291 } /* end GetCurrentContendedMonitor */
1292
1293
1294 // Threads_lock NOT held
1295 // thread - NOT pre-checked
1296 // proc - pre-checked for NULL
1297 // arg - NULL is a valid value, must be checked
1298 jvmtiError
1299 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1300 JavaThread* current_thread = JavaThread::current();
1301
1302 JavaThread* java_thread = NULL;
1303 oop thread_oop = NULL;
1304 ThreadsListHandle tlh(current_thread);
1305 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1306 if (err != JVMTI_ERROR_NONE) {
1307 // We got an error code so we don't have a JavaThread *, but
1308 // only return an error from here if we didn't get a valid
1309 // thread_oop.
1310 if (thread_oop == NULL) {
1311 return err;
1312 }
1313 // We have a valid thread_oop.
1314 }
1315
1316 if (java_thread != NULL) {
1317 // 'thread' refers to an existing JavaThread.
1318 return JVMTI_ERROR_INVALID_THREAD;
1319 }
1320
1321 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1322 return JVMTI_ERROR_INVALID_PRIORITY;
1323 }
1324
1325 Handle thread_hndl(current_thread, thread_oop);
1326 {
1327 MutexLocker mu(Threads_lock); // grab Threads_lock
1328
1329 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1330
1331 // At this point it may be possible that no osthread was created for the
1332 // JavaThread due to lack of memory.
1333 if (new_thread == NULL || new_thread->osthread() == NULL) {
1334 if (new_thread != NULL) {
1335 new_thread->smr_delete();
1336 }
1337 return JVMTI_ERROR_OUT_OF_MEMORY;
1338 }
1339
1340 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1341 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1342 java_lang_Thread::set_daemon(thread_hndl());
1343
1344 new_thread->set_threadObj(thread_hndl());
1345 Threads::add(new_thread);
1346 Thread::start(new_thread);
1347 } // unlock Threads_lock
1348
1349 return JVMTI_ERROR_NONE;
1350 } /* end RunAgentThread */
1351
1352 //
1353 // Thread Group functions
1354 //
1355
1356 // group_count_ptr - pre-checked for NULL
1357 // groups_ptr - pre-checked for NULL
1358 jvmtiError
1359 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1360 JavaThread* current_thread = JavaThread::current();
1361
1362 // Only one top level thread group now.
1363 *group_count_ptr = 1;
1364
1365 // Allocate memory to store global-refs to the thread groups.
1366 // Assume this area is freed by caller.
1367 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1368
1369 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1370
1371 // Convert oop to Handle, then convert Handle to global-ref.
1372 {
1373 HandleMark hm(current_thread);
1374 Handle system_thread_group(current_thread, Universe::system_thread_group());
1375 *groups_ptr[0] = jni_reference(system_thread_group);
1376 }
1377
1378 return JVMTI_ERROR_NONE;
1379 } /* end GetTopThreadGroups */
1380
1381
1382 // info_ptr - pre-checked for NULL
1383 jvmtiError
1384 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1385 ResourceMark rm;
1386 HandleMark hm;
1387
1388 JavaThread* current_thread = JavaThread::current();
1389
1390 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1391 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1392
1393 const char* name;
1394 Handle parent_group;
1395 bool is_daemon;
1396 ThreadPriority max_priority;
1397
1398 { MutexLocker mu(Threads_lock);
1399
1400 name = java_lang_ThreadGroup::name(group_obj());
1401 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1402 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1403 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1404 }
1405
1406 info_ptr->is_daemon = is_daemon;
1407 info_ptr->max_priority = max_priority;
1408 info_ptr->parent = jni_reference(parent_group);
1409
1410 if (name != NULL) {
1411 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1412 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1413 strcpy(info_ptr->name, name);
1414 } else {
1415 info_ptr->name = NULL;
1416 }
1417
1418 return JVMTI_ERROR_NONE;
1419 } /* end GetThreadGroupInfo */
1420
1421
1422 // thread_count_ptr - pre-checked for NULL
1423 // threads_ptr - pre-checked for NULL
1424 // group_count_ptr - pre-checked for NULL
1425 // groups_ptr - pre-checked for NULL
1426 jvmtiError
1427 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1428 JavaThread* current_thread = JavaThread::current();
1429 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1430 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1431
1432 Handle *thread_objs = NULL;
1433 Handle *group_objs = NULL;
1434 int nthreads = 0;
1435 int ngroups = 0;
1436 int hidden_threads = 0;
1437
1438 ResourceMark rm(current_thread);
1439 HandleMark hm(current_thread);
1440
1441 Handle group_hdl(current_thread, group_obj);
1442
1443 { // Cannot allow thread or group counts to change.
1444 MutexLocker mu(Threads_lock);
1445
1446 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1447 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1448
1449 if (nthreads > 0) {
1450 ThreadsListHandle tlh(current_thread);
1451 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1452 assert(nthreads <= threads->length(), "too many threads");
1453 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1454 for (int i=0, j=0; i<nthreads; i++) {
1455 oop thread_obj = threads->obj_at(i);
1456 assert(thread_obj != NULL, "thread_obj is NULL");
1457 JavaThread *java_thread = NULL;
1458 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1459 if (err == JVMTI_ERROR_NONE) {
1460 // Have a valid JavaThread*.
1461 if (java_thread->is_hidden_from_external_view()) {
1462 // Filter out hidden java threads.
1463 hidden_threads++;
1464 continue;
1465 }
1466 } else {
1467 // We couldn't convert thread_obj into a JavaThread*.
1468 if (err == JVMTI_ERROR_INVALID_THREAD) {
1469 // The thread_obj does not refer to a java.lang.Thread object
1470 // so skip it.
1471 hidden_threads++;
1472 continue;
1473 }
1474 // We have a valid thread_obj, but no JavaThread*; the caller
1475 // can still have limited use for the thread_obj.
1476 }
1477 thread_objs[j++] = Handle(current_thread, thread_obj);
1478 }
1479 nthreads -= hidden_threads;
1480 } // ThreadsListHandle is destroyed here.
1481
1482 if (ngroups > 0) {
1483 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1484 assert(ngroups <= groups->length(), "too many groups");
1485 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1486 for (int i=0; i<ngroups; i++) {
1487 oop group_obj = groups->obj_at(i);
1488 assert(group_obj != NULL, "group_obj != NULL");
1489 group_objs[i] = Handle(current_thread, group_obj);
1490 }
1491 }
1492 }
1493
1494 // have to make global handles outside of Threads_lock
1495 *group_count_ptr = ngroups;
1496 *thread_count_ptr = nthreads;
1497 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1498 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1499 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1500 return JVMTI_ERROR_OUT_OF_MEMORY;
1501 }
1502 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1503 return JVMTI_ERROR_OUT_OF_MEMORY;
1504 }
1505
1506 return JVMTI_ERROR_NONE;
1507 } /* end GetThreadGroupChildren */
1508
1509
1510 //
1511 // Stack Frame functions
1512 //
1513
1514 // Threads_lock NOT held, java_thread not protected by lock
1515 // java_thread - pre-checked
1516 // max_frame_count - pre-checked to be greater than or equal to 0
1517 // frame_buffer - pre-checked for NULL
1518 // count_ptr - pre-checked for NULL
1519 jvmtiError
1520 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1521 jvmtiError err = JVMTI_ERROR_NONE;
1522
1523 // It is only safe to perform the direct operation on the current
1524 // thread. All other usage needs to use a vm-safepoint-op for safety.
1525 if (java_thread == JavaThread::current()) {
1526 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1527 } else {
1528 // JVMTI get stack trace at safepoint. Do not require target thread to
1529 // be suspended.
1530 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1531 VMThread::execute(&op);
1532 err = op.result();
1533 }
1534
1535 return err;
1536 } /* end GetStackTrace */
1537
1538
1539 // max_frame_count - pre-checked to be greater than or equal to 0
1540 // stack_info_ptr - pre-checked for NULL
1541 // thread_count_ptr - pre-checked for NULL
1542 jvmtiError
1543 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1544 jvmtiError err = JVMTI_ERROR_NONE;
1545 JavaThread* calling_thread = JavaThread::current();
1546
1547 // JVMTI get stack traces at safepoint.
1548 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1549 VMThread::execute(&op);
1550 *thread_count_ptr = op.final_thread_count();
1551 *stack_info_ptr = op.stack_info();
1552 err = op.result();
1553 return err;
1554 } /* end GetAllStackTraces */
1555
1556
1557 // thread_count - pre-checked to be greater than or equal to 0
1558 // thread_list - pre-checked for NULL
1559 // max_frame_count - pre-checked to be greater than or equal to 0
1560 // stack_info_ptr - pre-checked for NULL
1561 jvmtiError
1562 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1563 jvmtiError err = JVMTI_ERROR_NONE;
1564 // JVMTI get stack traces at safepoint.
1565 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1566 VMThread::execute(&op);
1567 err = op.result();
1568 if (err == JVMTI_ERROR_NONE) {
1569 *stack_info_ptr = op.stack_info();
1570 }
1571 return err;
1572 } /* end GetThreadListStackTraces */
1573
1574
1575 // Threads_lock NOT held, java_thread not protected by lock
1576 // java_thread - pre-checked
1577 // count_ptr - pre-checked for NULL
1578 jvmtiError
1579 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1580 jvmtiError err = JVMTI_ERROR_NONE;
1581
1582 // retrieve or create JvmtiThreadState.
1583 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1584 if (state == NULL) {
1585 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1586 }
1587
1588 // It is only safe to perform the direct operation on the current
1589 // thread. All other usage needs to use a vm-safepoint-op for safety.
1590 if (java_thread == JavaThread::current()) {
1591 err = get_frame_count(state, count_ptr);
1592 } else {
1593 // get java stack frame count at safepoint.
1594 VM_GetFrameCount op(this, state, count_ptr);
1595 VMThread::execute(&op);
1596 err = op.result();
1597 }
1598 return err;
1599 } /* end GetFrameCount */
1600
1601
1602 // Threads_lock NOT held, java_thread not protected by lock
1603 // java_thread - pre-checked
1604 jvmtiError
1605 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1606 JavaThread* current_thread = JavaThread::current();
1607 HandleMark hm(current_thread);
1608 uint32_t debug_bits = 0;
1609
1610 // retrieve or create the state
1611 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1612 if (state == NULL) {
1613 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1614 }
1615
1616 // Check if java_thread is fully suspended
1617 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1618 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1619 }
1620 // Check to see if a PopFrame was already in progress
1621 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1622 // Probably possible for JVMTI clients to trigger this, but the
1623 // JPDA backend shouldn't allow this to happen
1624 return JVMTI_ERROR_INTERNAL;
1625 }
1626
1627 {
1628 // Was workaround bug
1629 // 4812902: popFrame hangs if the method is waiting at a synchronize
1630 // Catch this condition and return an error to avoid hanging.
1631 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1632 OSThread* osThread = java_thread->osthread();
1633 if (osThread->get_state() == MONITOR_WAIT) {
1634 return JVMTI_ERROR_OPAQUE_FRAME;
1635 }
1636 }
1637
1638 {
1639 ResourceMark rm(current_thread);
1640 // Check if there are more than one Java frame in this thread, that the top two frames
1641 // are Java (not native) frames, and that there is no intervening VM frame
1642 int frame_count = 0;
1643 bool is_interpreted[2];
1644 intptr_t *frame_sp[2];
1645 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1646 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1647 methodHandle mh(current_thread, vfs.method());
1648 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1649 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1650 frame_sp[frame_count] = vfs.frame_id();
1651 if (++frame_count > 1) break;
1652 }
1653 if (frame_count < 2) {
1654 // We haven't found two adjacent non-native Java frames on the top.
1655 // There can be two situations here:
1656 // 1. There are no more java frames
1657 // 2. Two top java frames are separated by non-java native frames
1658 if(vframeFor(java_thread, 1) == NULL) {
1659 return JVMTI_ERROR_NO_MORE_FRAMES;
1660 } else {
1661 // Intervening non-java native or VM frames separate java frames.
1662 // Current implementation does not support this. See bug #5031735.
1663 // In theory it is possible to pop frames in such cases.
1664 return JVMTI_ERROR_OPAQUE_FRAME;
1665 }
1666 }
1667
1668 // If any of the top 2 frames is a compiled one, need to deoptimize it
1669 for (int i = 0; i < 2; i++) {
1670 if (!is_interpreted[i]) {
1671 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1672 }
1673 }
1674
1675 // Update the thread state to reflect that the top frame is popped
1676 // so that cur_stack_depth is maintained properly and all frameIDs
1677 // are invalidated.
1678 // The current frame will be popped later when the suspended thread
1679 // is resumed and right before returning from VM to Java.
1680 // (see call_VM_base() in assembler_<cpu>.cpp).
1681
1682 // It's fine to update the thread state here because no JVMTI events
1683 // shall be posted for this PopFrame.
1684
1685 // It is only safe to perform the direct operation on the current
1686 // thread. All other usage needs to use a vm-safepoint-op for safety.
1687 if (java_thread == JavaThread::current()) {
1688 state->update_for_pop_top_frame();
1689 } else {
1690 VM_UpdateForPopTopFrame op(state);
1691 VMThread::execute(&op);
1692 jvmtiError err = op.result();
1693 if (err != JVMTI_ERROR_NONE) {
1694 return err;
1695 }
1696 }
1697
1698 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1699 // Set pending step flag for this popframe and it is cleared when next
1700 // step event is posted.
1701 state->set_pending_step_for_popframe();
1702 }
1703
1704 return JVMTI_ERROR_NONE;
1705 } /* end PopFrame */
1706
1707
1708 // Threads_lock NOT held, java_thread not protected by lock
1709 // java_thread - pre-checked
1710 // java_thread - unchecked
1711 // depth - pre-checked as non-negative
1712 // method_ptr - pre-checked for NULL
1713 // location_ptr - pre-checked for NULL
1714 jvmtiError
1715 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1716 jvmtiError err = JVMTI_ERROR_NONE;
1717
1718 // It is only safe to perform the direct operation on the current
1719 // thread. All other usage needs to use a vm-safepoint-op for safety.
1720 if (java_thread == JavaThread::current()) {
1721 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1722 } else {
1723 // JVMTI get java stack frame location at safepoint.
1724 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1725 VMThread::execute(&op);
1726 err = op.result();
1727 }
1728 return err;
1729 } /* end GetFrameLocation */
1730
1731
1732 // Threads_lock NOT held, java_thread not protected by lock
1733 // java_thread - pre-checked
1734 // java_thread - unchecked
1735 // depth - pre-checked as non-negative
1736 jvmtiError
1737 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1738 jvmtiError err = JVMTI_ERROR_NONE;
1739 ResourceMark rm;
1740 uint32_t debug_bits = 0;
1741
1742 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1743 if (state == NULL) {
1744 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1745 }
1746
1747 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1748 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1749 }
1750
1751 if (TraceJVMTICalls) {
1752 JvmtiSuspendControl::print();
1753 }
1754
1755 vframe *vf = vframeFor(java_thread, depth);
1756 if (vf == NULL) {
1757 return JVMTI_ERROR_NO_MORE_FRAMES;
1758 }
1759
1760 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1761 return JVMTI_ERROR_OPAQUE_FRAME;
1762 }
1763
1764 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1765
1766 // It is only safe to perform the direct operation on the current
1767 // thread. All other usage needs to use a vm-safepoint-op for safety.
1768 if (java_thread == JavaThread::current()) {
1769 int frame_number = state->count_frames() - depth;
1770 state->env_thread_state(this)->set_frame_pop(frame_number);
1771 } else {
1772 VM_SetFramePop op(this, state, depth);
1773 VMThread::execute(&op);
1774 err = op.result();
1775 }
1776 return err;
1777 } /* end NotifyFramePop */
1778
1779
1780 //
1781 // Force Early Return functions
1782 //
1783
1784 // Threads_lock NOT held, java_thread not protected by lock
1785 // java_thread - pre-checked
1786 jvmtiError
1787 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1788 jvalue val;
1789 val.l = value;
1790 return force_early_return(java_thread, val, atos);
1791 } /* end ForceEarlyReturnObject */
1792
1793
1794 // Threads_lock NOT held, java_thread not protected by lock
1795 // java_thread - pre-checked
1796 jvmtiError
1797 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1798 jvalue val;
1799 val.i = value;
1800 return force_early_return(java_thread, val, itos);
1801 } /* end ForceEarlyReturnInt */
1802
1803
1804 // Threads_lock NOT held, java_thread not protected by lock
1805 // java_thread - pre-checked
1806 jvmtiError
1807 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1808 jvalue val;
1809 val.j = value;
1810 return force_early_return(java_thread, val, ltos);
1811 } /* end ForceEarlyReturnLong */
1812
1813
1814 // Threads_lock NOT held, java_thread not protected by lock
1815 // java_thread - pre-checked
1816 jvmtiError
1817 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1818 jvalue val;
1819 val.f = value;
1820 return force_early_return(java_thread, val, ftos);
1821 } /* end ForceEarlyReturnFloat */
1822
1823
1824 // Threads_lock NOT held, java_thread not protected by lock
1825 // java_thread - pre-checked
1826 jvmtiError
1827 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1828 jvalue val;
1829 val.d = value;
1830 return force_early_return(java_thread, val, dtos);
1831 } /* end ForceEarlyReturnDouble */
1832
1833
1834 // Threads_lock NOT held, java_thread not protected by lock
1835 // java_thread - pre-checked
1836 jvmtiError
1837 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1838 jvalue val;
1839 val.j = 0L;
1840 return force_early_return(java_thread, val, vtos);
1841 } /* end ForceEarlyReturnVoid */
1842
1843
1844 //
1845 // Heap functions
1846 //
1847
1848 // klass - NULL is a valid value, must be checked
1849 // initial_object - NULL is a valid value, must be checked
1850 // callbacks - pre-checked for NULL
1851 // user_data - NULL is a valid value, must be checked
1852 jvmtiError
1853 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1854 // check klass if provided
1855 Klass* k = NULL;
1856 if (klass != NULL) {
1857 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1858 if (k_mirror == NULL) {
1859 return JVMTI_ERROR_INVALID_CLASS;
1860 }
1861 if (java_lang_Class::is_primitive(k_mirror)) {
1862 return JVMTI_ERROR_NONE;
1863 }
1864 k = java_lang_Class::as_Klass(k_mirror);
1865 if (klass == NULL) {
1866 return JVMTI_ERROR_INVALID_CLASS;
1867 }
1868 }
1869
1870 if (initial_object != NULL) {
1871 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1872 if (init_obj == NULL) {
1873 return JVMTI_ERROR_INVALID_OBJECT;
1874 }
1875 }
1876
1877 Thread *thread = Thread::current();
1878 HandleMark hm(thread);
1879
1880 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1881 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1882 return JVMTI_ERROR_NONE;
1883 } /* end FollowReferences */
1884
1885
1886 // klass - NULL is a valid value, must be checked
1887 // callbacks - pre-checked for NULL
1888 // user_data - NULL is a valid value, must be checked
1889 jvmtiError
1890 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1891 // check klass if provided
1892 Klass* k = NULL;
1893 if (klass != NULL) {
1894 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1895 if (k_mirror == NULL) {
1896 return JVMTI_ERROR_INVALID_CLASS;
1897 }
1898 if (java_lang_Class::is_primitive(k_mirror)) {
1899 return JVMTI_ERROR_NONE;
1900 }
1901 k = java_lang_Class::as_Klass(k_mirror);
1902 if (k == NULL) {
1903 return JVMTI_ERROR_INVALID_CLASS;
1904 }
1905 }
1906
1907 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1908 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1909 return JVMTI_ERROR_NONE;
1910 } /* end IterateThroughHeap */
1911
1912
1913 // tag_ptr - pre-checked for NULL
1914 jvmtiError
1915 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1916 oop o = JNIHandles::resolve_external_guard(object);
1917 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1918 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1919 return JVMTI_ERROR_NONE;
1920 } /* end GetTag */
1921
1922
1923 jvmtiError
1924 JvmtiEnv::SetTag(jobject object, jlong tag) {
1925 oop o = JNIHandles::resolve_external_guard(object);
1926 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1927 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1928 return JVMTI_ERROR_NONE;
1929 } /* end SetTag */
1930
1931
1932 // tag_count - pre-checked to be greater than or equal to 0
1933 // tags - pre-checked for NULL
1934 // count_ptr - pre-checked for NULL
1935 // object_result_ptr - NULL is a valid value, must be checked
1936 // tag_result_ptr - NULL is a valid value, must be checked
1937 jvmtiError
1938 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1939 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1940 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1941 } /* end GetObjectsWithTags */
1942
1943
1944 jvmtiError
1945 JvmtiEnv::ForceGarbageCollection() {
1946 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1947 return JVMTI_ERROR_NONE;
1948 } /* end ForceGarbageCollection */
1949
1950
1951 //
1952 // Heap (1.0) functions
1953 //
1954
1955 // object_reference_callback - pre-checked for NULL
1956 // user_data - NULL is a valid value, must be checked
1957 jvmtiError
1958 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1959 oop o = JNIHandles::resolve_external_guard(object);
1960 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1961 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1962 return JVMTI_ERROR_NONE;
1963 } /* end IterateOverObjectsReachableFromObject */
1964
1965
1966 // heap_root_callback - NULL is a valid value, must be checked
1967 // stack_ref_callback - NULL is a valid value, must be checked
1968 // object_ref_callback - NULL is a valid value, must be checked
1969 // user_data - NULL is a valid value, must be checked
1970 jvmtiError
1971 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1972 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1973 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1974 return JVMTI_ERROR_NONE;
1975 } /* end IterateOverReachableObjects */
1976
1977
1978 // heap_object_callback - pre-checked for NULL
1979 // user_data - NULL is a valid value, must be checked
1980 jvmtiError
1981 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1982 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1983 Thread *thread = Thread::current();
1984 HandleMark hm(thread);
1985 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
1986 return JVMTI_ERROR_NONE;
1987 } /* end IterateOverHeap */
1988
1989
1990 // k_mirror - may be primitive, this must be checked
1991 // heap_object_callback - pre-checked for NULL
1992 // user_data - NULL is a valid value, must be checked
1993 jvmtiError
1994 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1995 if (java_lang_Class::is_primitive(k_mirror)) {
1996 // DO PRIMITIVE CLASS PROCESSING
1997 return JVMTI_ERROR_NONE;
1998 }
1999 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2000 if (klass == NULL) {
2001 return JVMTI_ERROR_INVALID_CLASS;
2002 }
2003 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2004 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2005 return JVMTI_ERROR_NONE;
2006 } /* end IterateOverInstancesOfClass */
2007
2008
2009 //
2010 // Local Variable functions
2011 //
2012
2013 // Threads_lock NOT held, java_thread not protected by lock
2014 // java_thread - pre-checked
2015 // java_thread - unchecked
2016 // depth - pre-checked as non-negative
2017 // value_ptr - pre-checked for NULL
2018 jvmtiError
2019 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2020 JavaThread* current_thread = JavaThread::current();
2021 // rm object is created to clean up the javaVFrame created in
2022 // doit_prologue(), but after doit() is finished with it.
2023 ResourceMark rm(current_thread);
2024
2025 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2026 VMThread::execute(&op);
2027 jvmtiError err = op.result();
2028 if (err != JVMTI_ERROR_NONE) {
2029 return err;
2030 } else {
2031 *value_ptr = op.value().l;
2032 return JVMTI_ERROR_NONE;
2033 }
2034 } /* end GetLocalObject */
2035
2036 // Threads_lock NOT held, java_thread not protected by lock
2037 // java_thread - pre-checked
2038 // java_thread - unchecked
2039 // depth - pre-checked as non-negative
2040 // value - pre-checked for NULL
2041 jvmtiError
2042 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2043 JavaThread* current_thread = JavaThread::current();
2044 // rm object is created to clean up the javaVFrame created in
2045 // doit_prologue(), but after doit() is finished with it.
2046 ResourceMark rm(current_thread);
2047
2048 VM_GetReceiver op(java_thread, current_thread, depth);
2049 VMThread::execute(&op);
2050 jvmtiError err = op.result();
2051 if (err != JVMTI_ERROR_NONE) {
2052 return err;
2053 } else {
2054 *value_ptr = op.value().l;
2055 return JVMTI_ERROR_NONE;
2056 }
2057 } /* end GetLocalInstance */
2058
2059
2060 // Threads_lock NOT held, java_thread not protected by lock
2061 // java_thread - pre-checked
2062 // java_thread - unchecked
2063 // depth - pre-checked as non-negative
2064 // value_ptr - pre-checked for NULL
2065 jvmtiError
2066 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2067 // rm object is created to clean up the javaVFrame created in
2068 // doit_prologue(), but after doit() is finished with it.
2069 ResourceMark rm;
2070
2071 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2072 VMThread::execute(&op);
2073 *value_ptr = op.value().i;
2074 return op.result();
2075 } /* end GetLocalInt */
2076
2077
2078 // Threads_lock NOT held, java_thread not protected by lock
2079 // java_thread - pre-checked
2080 // java_thread - unchecked
2081 // depth - pre-checked as non-negative
2082 // value_ptr - pre-checked for NULL
2083 jvmtiError
2084 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2085 // rm object is created to clean up the javaVFrame created in
2086 // doit_prologue(), but after doit() is finished with it.
2087 ResourceMark rm;
2088
2089 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2090 VMThread::execute(&op);
2091 *value_ptr = op.value().j;
2092 return op.result();
2093 } /* end GetLocalLong */
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::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2103 // rm object is created to clean up the javaVFrame created in
2104 // doit_prologue(), but after doit() is finished with it.
2105 ResourceMark rm;
2106
2107 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2108 VMThread::execute(&op);
2109 *value_ptr = op.value().f;
2110 return op.result();
2111 } /* end GetLocalFloat */
2112
2113
2114 // Threads_lock NOT held, java_thread not protected by lock
2115 // java_thread - pre-checked
2116 // java_thread - unchecked
2117 // depth - pre-checked as non-negative
2118 // value_ptr - pre-checked for NULL
2119 jvmtiError
2120 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2121 // rm object is created to clean up the javaVFrame created in
2122 // doit_prologue(), but after doit() is finished with it.
2123 ResourceMark rm;
2124
2125 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2126 VMThread::execute(&op);
2127 *value_ptr = op.value().d;
2128 return op.result();
2129 } /* end GetLocalDouble */
2130
2131
2132 // Threads_lock NOT held, java_thread not protected by lock
2133 // java_thread - pre-checked
2134 // java_thread - unchecked
2135 // depth - pre-checked as non-negative
2136 jvmtiError
2137 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2138 // rm object is created to clean up the javaVFrame created in
2139 // doit_prologue(), but after doit() is finished with it.
2140 ResourceMark rm;
2141 jvalue val;
2142 val.l = value;
2143 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2144 VMThread::execute(&op);
2145 return op.result();
2146 } /* end SetLocalObject */
2147
2148
2149 // Threads_lock NOT held, java_thread not protected by lock
2150 // java_thread - pre-checked
2151 // java_thread - unchecked
2152 // depth - pre-checked as non-negative
2153 jvmtiError
2154 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2155 // rm object is created to clean up the javaVFrame created in
2156 // doit_prologue(), but after doit() is finished with it.
2157 ResourceMark rm;
2158 jvalue val;
2159 val.i = value;
2160 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2161 VMThread::execute(&op);
2162 return op.result();
2163 } /* end SetLocalInt */
2164
2165
2166 // Threads_lock NOT held, java_thread not protected by lock
2167 // java_thread - pre-checked
2168 // java_thread - unchecked
2169 // depth - pre-checked as non-negative
2170 jvmtiError
2171 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2172 // rm object is created to clean up the javaVFrame created in
2173 // doit_prologue(), but after doit() is finished with it.
2174 ResourceMark rm;
2175 jvalue val;
2176 val.j = value;
2177 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2178 VMThread::execute(&op);
2179 return op.result();
2180 } /* end SetLocalLong */
2181
2182
2183 // Threads_lock NOT held, java_thread not protected by lock
2184 // java_thread - pre-checked
2185 // java_thread - unchecked
2186 // depth - pre-checked as non-negative
2187 jvmtiError
2188 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2189 // rm object is created to clean up the javaVFrame created in
2190 // doit_prologue(), but after doit() is finished with it.
2191 ResourceMark rm;
2192 jvalue val;
2193 val.f = value;
2194 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2195 VMThread::execute(&op);
2196 return op.result();
2197 } /* end SetLocalFloat */
2198
2199
2200 // Threads_lock NOT held, java_thread not protected by lock
2201 // java_thread - pre-checked
2202 // java_thread - unchecked
2203 // depth - pre-checked as non-negative
2204 jvmtiError
2205 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2206 // rm object is created to clean up the javaVFrame created in
2207 // doit_prologue(), but after doit() is finished with it.
2208 ResourceMark rm;
2209 jvalue val;
2210 val.d = value;
2211 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2212 VMThread::execute(&op);
2213 return op.result();
2214 } /* end SetLocalDouble */
2215
2216
2217 //
2218 // Breakpoint functions
2219 //
2220
2221 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2222 jvmtiError
2223 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2224 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2225 if (location < 0) { // simple invalid location check first
2226 return JVMTI_ERROR_INVALID_LOCATION;
2227 }
2228 // verify that the breakpoint is not past the end of the method
2229 if (location >= (jlocation) method_oop->code_size()) {
2230 return JVMTI_ERROR_INVALID_LOCATION;
2231 }
2232
2233 ResourceMark rm;
2234 JvmtiBreakpoint bp(method_oop, location);
2235 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2236 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2237 return JVMTI_ERROR_DUPLICATE;
2238
2239 if (TraceJVMTICalls) {
2240 jvmti_breakpoints.print();
2241 }
2242
2243 return JVMTI_ERROR_NONE;
2244 } /* end SetBreakpoint */
2245
2246
2247 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2248 jvmtiError
2249 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2250 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2251
2252 if (location < 0) { // simple invalid location check first
2253 return JVMTI_ERROR_INVALID_LOCATION;
2254 }
2255
2256 // verify that the breakpoint is not past the end of the method
2257 if (location >= (jlocation) method_oop->code_size()) {
2258 return JVMTI_ERROR_INVALID_LOCATION;
2259 }
2260
2261 JvmtiBreakpoint bp(method_oop, location);
2262
2263 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2264 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2265 return JVMTI_ERROR_NOT_FOUND;
2266
2267 if (TraceJVMTICalls) {
2268 jvmti_breakpoints.print();
2269 }
2270
2271 return JVMTI_ERROR_NONE;
2272 } /* end ClearBreakpoint */
2273
2274
2275 //
2276 // Watched Field functions
2277 //
2278
2279 jvmtiError
2280 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2281 // make sure we haven't set this watch before
2282 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2283 fdesc_ptr->set_is_field_access_watched(true);
2284
2285 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2286
2287 return JVMTI_ERROR_NONE;
2288 } /* end SetFieldAccessWatch */
2289
2290
2291 jvmtiError
2292 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2293 // make sure we have a watch to clear
2294 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2295 fdesc_ptr->set_is_field_access_watched(false);
2296
2297 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2298
2299 return JVMTI_ERROR_NONE;
2300 } /* end ClearFieldAccessWatch */
2301
2302
2303 jvmtiError
2304 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2305 // make sure we haven't set this watch before
2306 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2307 fdesc_ptr->set_is_field_modification_watched(true);
2308
2309 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2310
2311 return JVMTI_ERROR_NONE;
2312 } /* end SetFieldModificationWatch */
2313
2314
2315 jvmtiError
2316 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2317 // make sure we have a watch to clear
2318 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2319 fdesc_ptr->set_is_field_modification_watched(false);
2320
2321 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2322
2323 return JVMTI_ERROR_NONE;
2324 } /* end ClearFieldModificationWatch */
2325
2326 //
2327 // Class functions
2328 //
2329
2330
2331 // k_mirror - may be primitive, this must be checked
2332 // signature_ptr - NULL is a valid value, must be checked
2333 // generic_ptr - NULL is a valid value, must be checked
2334 jvmtiError
2335 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2336 ResourceMark rm;
2337 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2338 Klass* k = NULL;
2339 if (!isPrimitive) {
2340 k = java_lang_Class::as_Klass(k_mirror);
2341 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2342 }
2343 if (signature_ptr != NULL) {
2344 char* result = NULL;
2345 if (isPrimitive) {
2346 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2347 result = (char*) jvmtiMalloc(2);
2348 result[0] = tchar;
2349 result[1] = '\0';
2350 } else {
2351 const char* class_sig = k->signature_name();
2352 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2353 strcpy(result, class_sig);
2354 }
2355 *signature_ptr = result;
2356 }
2357 if (generic_ptr != NULL) {
2358 *generic_ptr = NULL;
2359 if (!isPrimitive && k->is_instance_klass()) {
2360 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2361 if (soo != NULL) {
2362 const char *gen_sig = soo->as_C_string();
2363 if (gen_sig != NULL) {
2364 char* gen_result;
2365 jvmtiError err = allocate(strlen(gen_sig) + 1,
2366 (unsigned char **)&gen_result);
2367 if (err != JVMTI_ERROR_NONE) {
2368 return err;
2369 }
2370 strcpy(gen_result, gen_sig);
2371 *generic_ptr = gen_result;
2372 }
2373 }
2374 }
2375 }
2376 return JVMTI_ERROR_NONE;
2377 } /* end GetClassSignature */
2378
2379
2380 // k_mirror - may be primitive, this must be checked
2381 // status_ptr - pre-checked for NULL
2382 jvmtiError
2383 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2384 jint result = 0;
2385 if (java_lang_Class::is_primitive(k_mirror)) {
2386 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2387 } else {
2388 Klass* k = java_lang_Class::as_Klass(k_mirror);
2389 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2390 result = k->jvmti_class_status();
2391 }
2392 *status_ptr = result;
2393
2394 return JVMTI_ERROR_NONE;
2395 } /* end GetClassStatus */
2396
2397
2398 // k_mirror - may be primitive, this must be checked
2399 // source_name_ptr - pre-checked for NULL
2400 jvmtiError
2401 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2402 if (java_lang_Class::is_primitive(k_mirror)) {
2403 return JVMTI_ERROR_ABSENT_INFORMATION;
2404 }
2405 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2406 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2407
2408 if (!k_klass->is_instance_klass()) {
2409 return JVMTI_ERROR_ABSENT_INFORMATION;
2410 }
2411
2412 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2413 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2414 {
2415 JavaThread* current_thread = JavaThread::current();
2416 ResourceMark rm(current_thread);
2417 const char* sfncp = (const char*) sfnOop->as_C_string();
2418 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2419 strcpy(*source_name_ptr, sfncp);
2420 }
2421
2422 return JVMTI_ERROR_NONE;
2423 } /* end GetSourceFileName */
2424
2425
2426 // k_mirror - may be primitive, this must be checked
2427 // modifiers_ptr - pre-checked for NULL
2428 jvmtiError
2429 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2430 JavaThread* current_thread = JavaThread::current();
2431 jint result = 0;
2432 if (!java_lang_Class::is_primitive(k_mirror)) {
2433 Klass* k = java_lang_Class::as_Klass(k_mirror);
2434 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2435 result = k->compute_modifier_flags(current_thread);
2436 JavaThread* THREAD = current_thread; // pass to macros
2437 if (HAS_PENDING_EXCEPTION) {
2438 CLEAR_PENDING_EXCEPTION;
2439 return JVMTI_ERROR_INTERNAL;
2440 };
2441
2442 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2443 if(k->is_super()) {
2444 result |= JVM_ACC_SUPER;
2445 }
2446 } else {
2447 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2448 }
2449 *modifiers_ptr = result;
2450
2451 return JVMTI_ERROR_NONE;
2452 } /* end GetClassModifiers */
2453
2454
2455 // k_mirror - may be primitive, this must be checked
2456 // method_count_ptr - pre-checked for NULL
2457 // methods_ptr - pre-checked for NULL
2458 jvmtiError
2459 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2460 JavaThread* current_thread = JavaThread::current();
2461 HandleMark hm(current_thread);
2462
2463 if (java_lang_Class::is_primitive(k_mirror)) {
2464 *method_count_ptr = 0;
2465 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2466 return JVMTI_ERROR_NONE;
2467 }
2468 Klass* k = java_lang_Class::as_Klass(k_mirror);
2469 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2470
2471 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2472 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2473 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2474 }
2475
2476 if (!k->is_instance_klass()) {
2477 *method_count_ptr = 0;
2478 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2479 return JVMTI_ERROR_NONE;
2480 }
2481 InstanceKlass* ik = InstanceKlass::cast(k);
2482 // Allocate the result and fill it in
2483 int result_length = ik->methods()->length();
2484 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2485 int index;
2486 bool jmethodids_found = true;
2487
2488 if (JvmtiExport::can_maintain_original_method_order()) {
2489 // Use the original method ordering indices stored in the class, so we can emit
2490 // jmethodIDs in the order they appeared in the class file
2491 for (index = 0; index < result_length; index++) {
2492 Method* m = ik->methods()->at(index);
2493 int original_index = ik->method_ordering()->at(index);
2494 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2495 jmethodID id;
2496 if (jmethodids_found) {
2497 id = m->find_jmethod_id_or_null();
2498 if (id == NULL) {
2499 // If we find an uninitialized value, make sure there is
2500 // enough space for all the uninitialized values we might
2501 // find.
2502 ik->ensure_space_for_methodids(index);
2503 jmethodids_found = false;
2504 id = m->jmethod_id();
2505 }
2506 } else {
2507 id = m->jmethod_id();
2508 }
2509 result_list[original_index] = id;
2510 }
2511 } else {
2512 // otherwise just copy in any order
2513 for (index = 0; index < result_length; index++) {
2514 Method* m = ik->methods()->at(index);
2515 jmethodID id;
2516 if (jmethodids_found) {
2517 id = m->find_jmethod_id_or_null();
2518 if (id == NULL) {
2519 // If we find an uninitialized value, make sure there is
2520 // enough space for all the uninitialized values we might
2521 // find.
2522 ik->ensure_space_for_methodids(index);
2523 jmethodids_found = false;
2524 id = m->jmethod_id();
2525 }
2526 } else {
2527 id = m->jmethod_id();
2528 }
2529 result_list[index] = id;
2530 }
2531 }
2532 // Fill in return value.
2533 *method_count_ptr = result_length;
2534 *methods_ptr = result_list;
2535
2536 return JVMTI_ERROR_NONE;
2537 } /* end GetClassMethods */
2538
2539
2540 // k_mirror - may be primitive, this must be checked
2541 // field_count_ptr - pre-checked for NULL
2542 // fields_ptr - pre-checked for NULL
2543 jvmtiError
2544 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2545 if (java_lang_Class::is_primitive(k_mirror)) {
2546 *field_count_ptr = 0;
2547 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2548 return JVMTI_ERROR_NONE;
2549 }
2550 JavaThread* current_thread = JavaThread::current();
2551 HandleMark hm(current_thread);
2552 Klass* k = java_lang_Class::as_Klass(k_mirror);
2553 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2554
2555 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2556 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2557 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2558 }
2559
2560 if (!k->is_instance_klass()) {
2561 *field_count_ptr = 0;
2562 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2563 return JVMTI_ERROR_NONE;
2564 }
2565
2566
2567 InstanceKlass* ik = InstanceKlass::cast(k);
2568
2569 int result_count = 0;
2570 // First, count the fields.
2571 FilteredFieldStream flds(ik, true, true);
2572 result_count = flds.field_count();
2573
2574 // Allocate the result and fill it in
2575 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2576 // The JVMTI spec requires fields in the order they occur in the class file,
2577 // this is the reverse order of what FieldStream hands out.
2578 int id_index = (result_count - 1);
2579
2580 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2581 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2582 ik, src_st.offset(),
2583 src_st.access_flags().is_static());
2584 }
2585 assert(id_index == -1, "just checking");
2586 // Fill in the results
2587 *field_count_ptr = result_count;
2588 *fields_ptr = result_list;
2589
2590 return JVMTI_ERROR_NONE;
2591 } /* end GetClassFields */
2592
2593
2594 // k_mirror - may be primitive, this must be checked
2595 // interface_count_ptr - pre-checked for NULL
2596 // interfaces_ptr - pre-checked for NULL
2597 jvmtiError
2598 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2599 {
2600 if (java_lang_Class::is_primitive(k_mirror)) {
2601 *interface_count_ptr = 0;
2602 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2603 return JVMTI_ERROR_NONE;
2604 }
2605 JavaThread* current_thread = JavaThread::current();
2606 HandleMark hm(current_thread);
2607 Klass* k = java_lang_Class::as_Klass(k_mirror);
2608 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2609
2610 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2611 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2612 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2613
2614 if (!k->is_instance_klass()) {
2615 *interface_count_ptr = 0;
2616 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2617 return JVMTI_ERROR_NONE;
2618 }
2619
2620 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2621 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2622 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2623 for (int i_index = 0; i_index < result_length; i_index += 1) {
2624 Klass* klass_at = interface_list->at(i_index);
2625 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2626 assert(klass_at->is_interface(), "interfaces must be interfaces");
2627 oop mirror_at = klass_at->java_mirror();
2628 Handle handle_at = Handle(current_thread, mirror_at);
2629 result_list[i_index] = (jclass) jni_reference(handle_at);
2630 }
2631 *interface_count_ptr = result_length;
2632 *interfaces_ptr = result_list;
2633 }
2634
2635 return JVMTI_ERROR_NONE;
2636 } /* end GetImplementedInterfaces */
2637
2638
2639 // k_mirror - may be primitive, this must be checked
2640 // minor_version_ptr - pre-checked for NULL
2641 // major_version_ptr - pre-checked for NULL
2642 jvmtiError
2643 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2644 if (java_lang_Class::is_primitive(k_mirror)) {
2645 return JVMTI_ERROR_ABSENT_INFORMATION;
2646 }
2647 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2648
2649 jint status = klass->jvmti_class_status();
2650 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2651 return JVMTI_ERROR_INVALID_CLASS;
2652 }
2653 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2654 return JVMTI_ERROR_ABSENT_INFORMATION;
2655 }
2656
2657 InstanceKlass* ik = InstanceKlass::cast(klass);
2658 *minor_version_ptr = ik->minor_version();
2659 *major_version_ptr = ik->major_version();
2660
2661 return JVMTI_ERROR_NONE;
2662 } /* end GetClassVersionNumbers */
2663
2664
2665 // k_mirror - may be primitive, this must be checked
2666 // constant_pool_count_ptr - pre-checked for NULL
2667 // constant_pool_byte_count_ptr - pre-checked for NULL
2668 // constant_pool_bytes_ptr - pre-checked for NULL
2669 jvmtiError
2670 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2671 if (java_lang_Class::is_primitive(k_mirror)) {
2672 return JVMTI_ERROR_ABSENT_INFORMATION;
2673 }
2674
2675 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2676 Thread *thread = Thread::current();
2677 ResourceMark rm(thread);
2678
2679 jint status = klass->jvmti_class_status();
2680 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2681 return JVMTI_ERROR_INVALID_CLASS;
2682 }
2683 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2684 return JVMTI_ERROR_ABSENT_INFORMATION;
2685 }
2686
2687 InstanceKlass* ik = InstanceKlass::cast(klass);
2688 JvmtiConstantPoolReconstituter reconstituter(ik);
2689 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2690 return reconstituter.get_error();
2691 }
2692
2693 unsigned char *cpool_bytes;
2694 int cpool_size = reconstituter.cpool_size();
2695 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2696 return reconstituter.get_error();
2697 }
2698 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2699 if (res != JVMTI_ERROR_NONE) {
2700 return res;
2701 }
2702 reconstituter.copy_cpool_bytes(cpool_bytes);
2703 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2704 return reconstituter.get_error();
2705 }
2706
2707 constantPoolHandle constants(thread, ik->constants());
2708 *constant_pool_count_ptr = constants->length();
2709 *constant_pool_byte_count_ptr = cpool_size;
2710 *constant_pool_bytes_ptr = cpool_bytes;
2711
2712 return JVMTI_ERROR_NONE;
2713 } /* end GetConstantPool */
2714
2715
2716 // k_mirror - may be primitive, this must be checked
2717 // is_interface_ptr - pre-checked for NULL
2718 jvmtiError
2719 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2720 {
2721 bool result = false;
2722 if (!java_lang_Class::is_primitive(k_mirror)) {
2723 Klass* k = java_lang_Class::as_Klass(k_mirror);
2724 if (k != NULL && k->is_interface()) {
2725 result = true;
2726 }
2727 }
2728 *is_interface_ptr = result;
2729 }
2730
2731 return JVMTI_ERROR_NONE;
2732 } /* end IsInterface */
2733
2734
2735 // k_mirror - may be primitive, this must be checked
2736 // is_array_class_ptr - pre-checked for NULL
2737 jvmtiError
2738 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2739 {
2740 bool result = false;
2741 if (!java_lang_Class::is_primitive(k_mirror)) {
2742 Klass* k = java_lang_Class::as_Klass(k_mirror);
2743 if (k != NULL && k->is_array_klass()) {
2744 result = true;
2745 }
2746 }
2747 *is_array_class_ptr = result;
2748 }
2749
2750 return JVMTI_ERROR_NONE;
2751 } /* end IsArrayClass */
2752
2753
2754 // k_mirror - may be primitive, this must be checked
2755 // classloader_ptr - pre-checked for NULL
2756 jvmtiError
2757 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2758 {
2759 if (java_lang_Class::is_primitive(k_mirror)) {
2760 *classloader_ptr = (jclass) jni_reference(Handle());
2761 return JVMTI_ERROR_NONE;
2762 }
2763 JavaThread* current_thread = JavaThread::current();
2764 HandleMark hm(current_thread);
2765 Klass* k = java_lang_Class::as_Klass(k_mirror);
2766 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2767
2768 oop result_oop = k->class_loader();
2769 if (result_oop == NULL) {
2770 *classloader_ptr = (jclass) jni_reference(Handle());
2771 return JVMTI_ERROR_NONE;
2772 }
2773 Handle result_handle = Handle(current_thread, result_oop);
2774 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2775 *classloader_ptr = result_jnihandle;
2776 }
2777 return JVMTI_ERROR_NONE;
2778 } /* end GetClassLoader */
2779
2780
2781 // k_mirror - may be primitive, this must be checked
2782 // source_debug_extension_ptr - pre-checked for NULL
2783 jvmtiError
2784 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2785 {
2786 if (java_lang_Class::is_primitive(k_mirror)) {
2787 return JVMTI_ERROR_ABSENT_INFORMATION;
2788 }
2789 Klass* k = java_lang_Class::as_Klass(k_mirror);
2790 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2791 if (!k->is_instance_klass()) {
2792 return JVMTI_ERROR_ABSENT_INFORMATION;
2793 }
2794 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2795 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2796
2797 {
2798 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2799 strcpy(*source_debug_extension_ptr, sde);
2800 }
2801 }
2802
2803 return JVMTI_ERROR_NONE;
2804 } /* end GetSourceDebugExtension */
2805
2806 //
2807 // Object functions
2808 //
2809
2810 // hash_code_ptr - pre-checked for NULL
2811 jvmtiError
2812 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2813 oop mirror = JNIHandles::resolve_external_guard(object);
2814 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2815 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2816
2817 {
2818 jint result = (jint) mirror->identity_hash();
2819 *hash_code_ptr = result;
2820 }
2821 return JVMTI_ERROR_NONE;
2822 } /* end GetObjectHashCode */
2823
2824
2825 // info_ptr - pre-checked for NULL
2826 jvmtiError
2827 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2828 JavaThread* calling_thread = JavaThread::current();
2829 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2830 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2831 // Some of the critical threads were not suspended. go to a safepoint and try again
2832 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2833 VMThread::execute(&op);
2834 err = op.result();
2835 }
2836 return err;
2837 } /* end GetObjectMonitorUsage */
2838
2839
2840 //
2841 // Field functions
2842 //
2843
2844 // name_ptr - NULL is a valid value, must be checked
2845 // signature_ptr - NULL is a valid value, must be checked
2846 // generic_ptr - NULL is a valid value, must be checked
2847 jvmtiError
2848 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2849 JavaThread* current_thread = JavaThread::current();
2850 ResourceMark rm(current_thread);
2851 if (name_ptr == NULL) {
2852 // just don't return the name
2853 } else {
2854 const char* fieldName = fdesc_ptr->name()->as_C_string();
2855 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2856 if (*name_ptr == NULL)
2857 return JVMTI_ERROR_OUT_OF_MEMORY;
2858 strcpy(*name_ptr, fieldName);
2859 }
2860 if (signature_ptr== NULL) {
2861 // just don't return the signature
2862 } else {
2863 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2864 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2865 if (*signature_ptr == NULL)
2866 return JVMTI_ERROR_OUT_OF_MEMORY;
2867 strcpy(*signature_ptr, fieldSignature);
2868 }
2869 if (generic_ptr != NULL) {
2870 *generic_ptr = NULL;
2871 Symbol* soop = fdesc_ptr->generic_signature();
2872 if (soop != NULL) {
2873 const char* gen_sig = soop->as_C_string();
2874 if (gen_sig != NULL) {
2875 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2876 if (err != JVMTI_ERROR_NONE) {
2877 return err;
2878 }
2879 strcpy(*generic_ptr, gen_sig);
2880 }
2881 }
2882 }
2883 return JVMTI_ERROR_NONE;
2884 } /* end GetFieldName */
2885
2886
2887 // declaring_class_ptr - pre-checked for NULL
2888 jvmtiError
2889 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2890
2891 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2892 return JVMTI_ERROR_NONE;
2893 } /* end GetFieldDeclaringClass */
2894
2895
2896 // modifiers_ptr - pre-checked for NULL
2897 jvmtiError
2898 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2899
2900 AccessFlags resultFlags = fdesc_ptr->access_flags();
2901 jint result = resultFlags.as_int();
2902 *modifiers_ptr = result;
2903
2904 return JVMTI_ERROR_NONE;
2905 } /* end GetFieldModifiers */
2906
2907
2908 // is_synthetic_ptr - pre-checked for NULL
2909 jvmtiError
2910 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2911 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2912 return JVMTI_ERROR_NONE;
2913 } /* end IsFieldSynthetic */
2914
2915
2916 //
2917 // Method functions
2918 //
2919
2920 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2921 // name_ptr - NULL is a valid value, must be checked
2922 // signature_ptr - NULL is a valid value, must be checked
2923 // generic_ptr - NULL is a valid value, must be checked
2924 jvmtiError
2925 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2926 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2927 JavaThread* current_thread = JavaThread::current();
2928
2929 ResourceMark rm(current_thread); // get the utf8 name and signature
2930 if (name_ptr == NULL) {
2931 // just don't return the name
2932 } else {
2933 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2934 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2935 strcpy(*name_ptr, utf8_name);
2936 }
2937 if (signature_ptr == NULL) {
2938 // just don't return the signature
2939 } else {
2940 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2941 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2942 strcpy(*signature_ptr, utf8_signature);
2943 }
2944
2945 if (generic_ptr != NULL) {
2946 *generic_ptr = NULL;
2947 Symbol* soop = method_oop->generic_signature();
2948 if (soop != NULL) {
2949 const char* gen_sig = soop->as_C_string();
2950 if (gen_sig != NULL) {
2951 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2952 if (err != JVMTI_ERROR_NONE) {
2953 return err;
2954 }
2955 strcpy(*generic_ptr, gen_sig);
2956 }
2957 }
2958 }
2959 return JVMTI_ERROR_NONE;
2960 } /* end GetMethodName */
2961
2962
2963 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2964 // declaring_class_ptr - pre-checked for NULL
2965 jvmtiError
2966 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2967 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2968 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2969 return JVMTI_ERROR_NONE;
2970 } /* end GetMethodDeclaringClass */
2971
2972
2973 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2974 // modifiers_ptr - pre-checked for NULL
2975 jvmtiError
2976 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2977 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2978 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2979 return JVMTI_ERROR_NONE;
2980 } /* end GetMethodModifiers */
2981
2982
2983 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2984 // max_ptr - pre-checked for NULL
2985 jvmtiError
2986 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2987 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2988 // get max stack
2989 (*max_ptr) = method_oop->max_locals();
2990 return JVMTI_ERROR_NONE;
2991 } /* end GetMaxLocals */
2992
2993
2994 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2995 // size_ptr - pre-checked for NULL
2996 jvmtiError
2997 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2998 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2999 // get size of arguments
3000
3001 (*size_ptr) = method_oop->size_of_parameters();
3002 return JVMTI_ERROR_NONE;
3003 } /* end GetArgumentsSize */
3004
3005
3006 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3007 // entry_count_ptr - pre-checked for NULL
3008 // table_ptr - pre-checked for NULL
3009 jvmtiError
3010 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3011 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3012 if (!method_oop->has_linenumber_table()) {
3013 return (JVMTI_ERROR_ABSENT_INFORMATION);
3014 }
3015
3016 // The line number table is compressed so we don't know how big it is until decompressed.
3017 // Decompression is really fast so we just do it twice.
3018
3019 // Compute size of table
3020 jint num_entries = 0;
3021 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3022 while (stream.read_pair()) {
3023 num_entries++;
3024 }
3025 jvmtiLineNumberEntry *jvmti_table =
3026 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3027
3028 // Fill jvmti table
3029 if (num_entries > 0) {
3030 int index = 0;
3031 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3032 while (stream.read_pair()) {
3033 jvmti_table[index].start_location = (jlocation) stream.bci();
3034 jvmti_table[index].line_number = (jint) stream.line();
3035 index++;
3036 }
3037 assert(index == num_entries, "sanity check");
3038 }
3039
3040 // Set up results
3041 (*entry_count_ptr) = num_entries;
3042 (*table_ptr) = jvmti_table;
3043
3044 return JVMTI_ERROR_NONE;
3045 } /* end GetLineNumberTable */
3046
3047
3048 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3049 // start_location_ptr - pre-checked for NULL
3050 // end_location_ptr - pre-checked for NULL
3051 jvmtiError
3052 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3053
3054 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3055 // get start and end location
3056 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3057 if (method_oop->code_size() == 0) {
3058 // there is no code so there is no start location
3059 (*start_location_ptr) = (jlocation)(-1);
3060 } else {
3061 (*start_location_ptr) = (jlocation)(0);
3062 }
3063
3064 return JVMTI_ERROR_NONE;
3065 } /* end GetMethodLocation */
3066
3067
3068 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3069 // entry_count_ptr - pre-checked for NULL
3070 // table_ptr - pre-checked for NULL
3071 jvmtiError
3072 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3073
3074 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3075 JavaThread* current_thread = JavaThread::current();
3076
3077 // does the klass have any local variable information?
3078 InstanceKlass* ik = method_oop->method_holder();
3079 if (!ik->access_flags().has_localvariable_table()) {
3080 return (JVMTI_ERROR_ABSENT_INFORMATION);
3081 }
3082
3083 ConstantPool* constants = method_oop->constants();
3084 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3085
3086 // in the vm localvariable table representation, 6 consecutive elements in the table
3087 // represent a 6-tuple of shorts
3088 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3089 jint num_entries = method_oop->localvariable_table_length();
3090 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3091 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3092
3093 if (num_entries > 0) {
3094 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3095 for (int i = 0; i < num_entries; i++) {
3096 // get the 5 tuple information from the vm table
3097 jlocation start_location = (jlocation) table[i].start_bci;
3098 jint length = (jint) table[i].length;
3099 int name_index = (int) table[i].name_cp_index;
3100 int signature_index = (int) table[i].descriptor_cp_index;
3101 int generic_signature_index = (int) table[i].signature_cp_index;
3102 jint slot = (jint) table[i].slot;
3103
3104 // get utf8 name and signature
3105 char *name_buf = NULL;
3106 char *sig_buf = NULL;
3107 char *gen_sig_buf = NULL;
3108 {
3109 ResourceMark rm(current_thread);
3110
3111 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3112 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3113 strcpy(name_buf, utf8_name);
3114
3115 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3116 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3117 strcpy(sig_buf, utf8_signature);
3118
3119 if (generic_signature_index > 0) {
3120 const char *utf8_gen_sign = (const char *)
3121 constants->symbol_at(generic_signature_index)->as_utf8();
3122 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3123 strcpy(gen_sig_buf, utf8_gen_sign);
3124 }
3125 }
3126
3127 // fill in the jvmti local variable table
3128 jvmti_table[i].start_location = start_location;
3129 jvmti_table[i].length = length;
3130 jvmti_table[i].name = name_buf;
3131 jvmti_table[i].signature = sig_buf;
3132 jvmti_table[i].generic_signature = gen_sig_buf;
3133 jvmti_table[i].slot = slot;
3134 }
3135 }
3136
3137 // set results
3138 (*entry_count_ptr) = num_entries;
3139 (*table_ptr) = jvmti_table;
3140
3141 return JVMTI_ERROR_NONE;
3142 } /* end GetLocalVariableTable */
3143
3144
3145 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3146 // bytecode_count_ptr - pre-checked for NULL
3147 // bytecodes_ptr - pre-checked for NULL
3148 jvmtiError
3149 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3150 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3151
3152 HandleMark hm;
3153 methodHandle method(method_oop);
3154 jint size = (jint)method->code_size();
3155 jvmtiError err = allocate(size, bytecodes_ptr);
3156 if (err != JVMTI_ERROR_NONE) {
3157 return err;
3158 }
3159
3160 (*bytecode_count_ptr) = size;
3161 // get byte codes
3162 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3163
3164 return JVMTI_ERROR_NONE;
3165 } /* end GetBytecodes */
3166
3167
3168 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3169 // is_native_ptr - pre-checked for NULL
3170 jvmtiError
3171 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3172 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3173 (*is_native_ptr) = method_oop->is_native();
3174 return JVMTI_ERROR_NONE;
3175 } /* end IsMethodNative */
3176
3177
3178 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3179 // is_synthetic_ptr - pre-checked for NULL
3180 jvmtiError
3181 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3182 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3183 (*is_synthetic_ptr) = method_oop->is_synthetic();
3184 return JVMTI_ERROR_NONE;
3185 } /* end IsMethodSynthetic */
3186
3187
3188 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3189 // is_obsolete_ptr - pre-checked for NULL
3190 jvmtiError
3191 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3192 if (use_version_1_0_semantics() &&
3193 get_capabilities()->can_redefine_classes == 0) {
3194 // This JvmtiEnv requested version 1.0 semantics and this function
3195 // requires the can_redefine_classes capability in version 1.0 so
3196 // we need to return an error here.
3197 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3198 }
3199
3200 if (method_oop == NULL || method_oop->is_obsolete()) {
3201 *is_obsolete_ptr = true;
3202 } else {
3203 *is_obsolete_ptr = false;
3204 }
3205 return JVMTI_ERROR_NONE;
3206 } /* end IsMethodObsolete */
3207
3208 //
3209 // Raw Monitor functions
3210 //
3211
3212 // name - pre-checked for NULL
3213 // monitor_ptr - pre-checked for NULL
3214 jvmtiError
3215 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3216 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3217 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3218
3219 *monitor_ptr = (jrawMonitorID)rmonitor;
3220
3221 return JVMTI_ERROR_NONE;
3222 } /* end CreateRawMonitor */
3223
3224
3225 // rmonitor - pre-checked for validity
3226 jvmtiError
3227 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3228 if (Threads::number_of_threads() == 0) {
3229 // Remove this monitor from pending raw monitors list
3230 // if it has entered in onload or start phase.
3231 JvmtiPendingMonitors::destroy(rmonitor);
3232 } else {
3233 Thread* thread = Thread::current();
3234 if (rmonitor->is_entered(thread)) {
3235 // The caller owns this monitor which we are about to destroy.
3236 // We exit the underlying synchronization object so that the
3237 // "delete monitor" call below can work without an assertion
3238 // failure on systems that don't like destroying synchronization
3239 // objects that are locked.
3240 int r;
3241 intptr_t recursion = rmonitor->recursions();
3242 for (intptr_t i=0; i <= recursion; i++) {
3243 r = rmonitor->raw_exit(thread);
3244 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3245 if (r != ObjectMonitor::OM_OK) { // robustness
3246 return JVMTI_ERROR_INTERNAL;
3247 }
3248 }
3249 }
3250 if (rmonitor->owner() != NULL) {
3251 // The caller is trying to destroy a monitor that is locked by
3252 // someone else. While this is not forbidden by the JVMTI
3253 // spec, it will cause an assertion failure on systems that don't
3254 // like destroying synchronization objects that are locked.
3255 // We indicate a problem with the error return (and leak the
3256 // monitor's memory).
3257 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3258 }
3259 }
3260
3261 delete rmonitor;
3262
3263 return JVMTI_ERROR_NONE;
3264 } /* end DestroyRawMonitor */
3265
3266
3267 // rmonitor - pre-checked for validity
3268 jvmtiError
3269 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3270 if (Threads::number_of_threads() == 0) {
3271 // No JavaThreads exist so ObjectMonitor enter cannot be
3272 // used, add this raw monitor to the pending list.
3273 // The pending monitors will be actually entered when
3274 // the VM is setup.
3275 // See transition_pending_raw_monitors in create_vm()
3276 // in thread.cpp.
3277 JvmtiPendingMonitors::enter(rmonitor);
3278 } else {
3279 int r = 0;
3280 Thread* thread = Thread::current();
3281
3282 if (thread->is_Java_thread()) {
3283 JavaThread* current_thread = (JavaThread*)thread;
3284
3285 #ifdef PROPER_TRANSITIONS
3286 // Not really unknown but ThreadInVMfromNative does more than we want
3287 ThreadInVMfromUnknown __tiv;
3288 {
3289 ThreadBlockInVM __tbivm(current_thread);
3290 r = rmonitor->raw_enter(current_thread);
3291 }
3292 #else
3293 /* Transition to thread_blocked without entering vm state */
3294 /* This is really evil. Normally you can't undo _thread_blocked */
3295 /* transitions like this because it would cause us to miss a */
3296 /* safepoint but since the thread was already in _thread_in_native */
3297 /* the thread is not leaving a safepoint safe state and it will */
3298 /* block when it tries to return from native. We can't safepoint */
3299 /* block in here because we could deadlock the vmthread. Blech. */
3300
3301 JavaThreadState state = current_thread->thread_state();
3302 assert(state == _thread_in_native, "Must be _thread_in_native");
3303 // frame should already be walkable since we are in native
3304 assert(!current_thread->has_last_Java_frame() ||
3305 current_thread->frame_anchor()->walkable(), "Must be walkable");
3306 current_thread->set_thread_state(_thread_blocked);
3307
3308 r = rmonitor->raw_enter(current_thread);
3309 // restore state, still at a safepoint safe state
3310 current_thread->set_thread_state(state);
3311
3312 #endif /* PROPER_TRANSITIONS */
3313 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3314 } else {
3315 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3316 r = rmonitor->raw_enter(thread);
3317 } else {
3318 ShouldNotReachHere();
3319 }
3320 }
3321
3322 if (r != ObjectMonitor::OM_OK) { // robustness
3323 return JVMTI_ERROR_INTERNAL;
3324 }
3325 }
3326 return JVMTI_ERROR_NONE;
3327 } /* end RawMonitorEnter */
3328
3329
3330 // rmonitor - pre-checked for validity
3331 jvmtiError
3332 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3333 jvmtiError err = JVMTI_ERROR_NONE;
3334
3335 if (Threads::number_of_threads() == 0) {
3336 // No JavaThreads exist so just remove this monitor from the pending list.
3337 // Bool value from exit is false if rmonitor is not in the list.
3338 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3339 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3340 }
3341 } else {
3342 int r = 0;
3343 Thread* thread = Thread::current();
3344
3345 if (thread->is_Java_thread()) {
3346 JavaThread* current_thread = (JavaThread*)thread;
3347 #ifdef PROPER_TRANSITIONS
3348 // Not really unknown but ThreadInVMfromNative does more than we want
3349 ThreadInVMfromUnknown __tiv;
3350 #endif /* PROPER_TRANSITIONS */
3351 r = rmonitor->raw_exit(current_thread);
3352 } else {
3353 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3354 r = rmonitor->raw_exit(thread);
3355 } else {
3356 ShouldNotReachHere();
3357 }
3358 }
3359
3360 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3361 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3362 } else {
3363 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3364 if (r != ObjectMonitor::OM_OK) { // robustness
3365 err = JVMTI_ERROR_INTERNAL;
3366 }
3367 }
3368 }
3369 return err;
3370 } /* end RawMonitorExit */
3371
3372
3373 // rmonitor - pre-checked for validity
3374 jvmtiError
3375 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3376 int r = 0;
3377 Thread* thread = Thread::current();
3378
3379 if (thread->is_Java_thread()) {
3380 JavaThread* current_thread = (JavaThread*)thread;
3381 #ifdef PROPER_TRANSITIONS
3382 // Not really unknown but ThreadInVMfromNative does more than we want
3383 ThreadInVMfromUnknown __tiv;
3384 {
3385 ThreadBlockInVM __tbivm(current_thread);
3386 r = rmonitor->raw_wait(millis, true, current_thread);
3387 }
3388 #else
3389 /* Transition to thread_blocked without entering vm state */
3390 /* This is really evil. Normally you can't undo _thread_blocked */
3391 /* transitions like this because it would cause us to miss a */
3392 /* safepoint but since the thread was already in _thread_in_native */
3393 /* the thread is not leaving a safepoint safe state and it will */
3394 /* block when it tries to return from native. We can't safepoint */
3395 /* block in here because we could deadlock the vmthread. Blech. */
3396
3397 JavaThreadState state = current_thread->thread_state();
3398 assert(state == _thread_in_native, "Must be _thread_in_native");
3399 // frame should already be walkable since we are in native
3400 assert(!current_thread->has_last_Java_frame() ||
3401 current_thread->frame_anchor()->walkable(), "Must be walkable");
3402 current_thread->set_thread_state(_thread_blocked);
3403
3404 r = rmonitor->raw_wait(millis, true, current_thread);
3405 // restore state, still at a safepoint safe state
3406 current_thread->set_thread_state(state);
3407
3408 #endif /* PROPER_TRANSITIONS */
3409 } else {
3410 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3411 r = rmonitor->raw_wait(millis, true, thread);
3412 } else {
3413 ShouldNotReachHere();
3414 }
3415 }
3416
3417 switch (r) {
3418 case ObjectMonitor::OM_INTERRUPTED:
3419 return JVMTI_ERROR_INTERRUPT;
3420 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3421 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3422 }
3423 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3424 if (r != ObjectMonitor::OM_OK) { // robustness
3425 return JVMTI_ERROR_INTERNAL;
3426 }
3427
3428 return JVMTI_ERROR_NONE;
3429 } /* end RawMonitorWait */
3430
3431
3432 // rmonitor - pre-checked for validity
3433 jvmtiError
3434 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3435 int r = 0;
3436 Thread* thread = Thread::current();
3437
3438 if (thread->is_Java_thread()) {
3439 JavaThread* current_thread = (JavaThread*)thread;
3440 // Not really unknown but ThreadInVMfromNative does more than we want
3441 ThreadInVMfromUnknown __tiv;
3442 r = rmonitor->raw_notify(current_thread);
3443 } else {
3444 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3445 r = rmonitor->raw_notify(thread);
3446 } else {
3447 ShouldNotReachHere();
3448 }
3449 }
3450
3451 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3452 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3453 }
3454 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3455 if (r != ObjectMonitor::OM_OK) { // robustness
3456 return JVMTI_ERROR_INTERNAL;
3457 }
3458
3459 return JVMTI_ERROR_NONE;
3460 } /* end RawMonitorNotify */
3461
3462
3463 // rmonitor - pre-checked for validity
3464 jvmtiError
3465 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3466 int r = 0;
3467 Thread* thread = Thread::current();
3468
3469 if (thread->is_Java_thread()) {
3470 JavaThread* current_thread = (JavaThread*)thread;
3471 ThreadInVMfromUnknown __tiv;
3472 r = rmonitor->raw_notifyAll(current_thread);
3473 } else {
3474 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3475 r = rmonitor->raw_notifyAll(thread);
3476 } else {
3477 ShouldNotReachHere();
3478 }
3479 }
3480
3481 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3482 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3483 }
3484 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3485 if (r != ObjectMonitor::OM_OK) { // robustness
3486 return JVMTI_ERROR_INTERNAL;
3487 }
3488
3489 return JVMTI_ERROR_NONE;
3490 } /* end RawMonitorNotifyAll */
3491
3492
3493 //
3494 // JNI Function Interception functions
3495 //
3496
3497
3498 // function_table - pre-checked for NULL
3499 jvmtiError
3500 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3501 // Copy jni function table at safepoint.
3502 VM_JNIFunctionTableCopier copier(function_table);
3503 VMThread::execute(&copier);
3504
3505 return JVMTI_ERROR_NONE;
3506 } /* end SetJNIFunctionTable */
3507
3508
3509 // function_table - pre-checked for NULL
3510 jvmtiError
3511 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3512 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3513 if (*function_table == NULL)
3514 return JVMTI_ERROR_OUT_OF_MEMORY;
3515 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3516 return JVMTI_ERROR_NONE;
3517 } /* end GetJNIFunctionTable */
3518
3519
3520 //
3521 // Event Management functions
3522 //
3523
3524 jvmtiError
3525 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3526 // can only generate two event types
3527 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3528 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3529 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3530 }
3531
3532 // for compiled_method_load events we must check that the environment
3533 // has the can_generate_compiled_method_load_events capability.
3534 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3535 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3536 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3537 }
3538 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3539 } else {
3540 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3541 }
3542
3543 } /* end GenerateEvents */
3544
3545
3546 //
3547 // Extension Mechanism functions
3548 //
3549
3550 // extension_count_ptr - pre-checked for NULL
3551 // extensions - pre-checked for NULL
3552 jvmtiError
3553 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3554 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3555 } /* end GetExtensionFunctions */
3556
3557
3558 // extension_count_ptr - pre-checked for NULL
3559 // extensions - pre-checked for NULL
3560 jvmtiError
3561 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3562 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3563 } /* end GetExtensionEvents */
3564
3565
3566 // callback - NULL is a valid value, must be checked
3567 jvmtiError
3568 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3569 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3570 } /* end SetExtensionEventCallback */
3571
3572 //
3573 // Timers functions
3574 //
3575
3576 // info_ptr - pre-checked for NULL
3577 jvmtiError
3578 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3579 os::current_thread_cpu_time_info(info_ptr);
3580 return JVMTI_ERROR_NONE;
3581 } /* end GetCurrentThreadCpuTimerInfo */
3582
3583
3584 // nanos_ptr - pre-checked for NULL
3585 jvmtiError
3586 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3587 *nanos_ptr = os::current_thread_cpu_time();
3588 return JVMTI_ERROR_NONE;
3589 } /* end GetCurrentThreadCpuTime */
3590
3591
3592 // info_ptr - pre-checked for NULL
3593 jvmtiError
3594 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3595 os::thread_cpu_time_info(info_ptr);
3596 return JVMTI_ERROR_NONE;
3597 } /* end GetThreadCpuTimerInfo */
3598
3599
3600 // Threads_lock NOT held, java_thread not protected by lock
3601 // java_thread - pre-checked
3602 // nanos_ptr - pre-checked for NULL
3603 jvmtiError
3604 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3605 *nanos_ptr = os::thread_cpu_time(java_thread);
3606 return JVMTI_ERROR_NONE;
3607 } /* end GetThreadCpuTime */
3608
3609
3610 // info_ptr - pre-checked for NULL
3611 jvmtiError
3612 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3613 os::javaTimeNanos_info(info_ptr);
3614 return JVMTI_ERROR_NONE;
3615 } /* end GetTimerInfo */
3616
3617
3618 // nanos_ptr - pre-checked for NULL
3619 jvmtiError
3620 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3621 *nanos_ptr = os::javaTimeNanos();
3622 return JVMTI_ERROR_NONE;
3623 } /* end GetTime */
3624
3625
3626 // processor_count_ptr - pre-checked for NULL
3627 jvmtiError
3628 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3629 *processor_count_ptr = os::active_processor_count();
3630 return JVMTI_ERROR_NONE;
3631 } /* end GetAvailableProcessors */
3632
3633 //
3634 // System Properties functions
3635 //
3636
3637 // count_ptr - pre-checked for NULL
3638 // property_ptr - pre-checked for NULL
3639 jvmtiError
3640 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3641 jvmtiError err = JVMTI_ERROR_NONE;
3642
3643 // Get the number of readable properties.
3644 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3645
3646 // Allocate memory to hold the exact number of readable properties.
3647 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3648 if (err != JVMTI_ERROR_NONE) {
3649 return err;
3650 }
3651 int readable_count = 0;
3652 // Loop through the system properties until all the readable properties are found.
3653 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3654 if (p->is_readable()) {
3655 const char *key = p->key();
3656 char **tmp_value = *property_ptr+readable_count;
3657 readable_count++;
3658 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3659 if (err == JVMTI_ERROR_NONE) {
3660 strcpy(*tmp_value, key);
3661 } else {
3662 // clean up previously allocated memory.
3663 for (int j=0; j<readable_count; j++) {
3664 Deallocate((unsigned char*)*property_ptr+j);
3665 }
3666 Deallocate((unsigned char*)property_ptr);
3667 break;
3668 }
3669 }
3670 }
3671 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3672 return err;
3673 } /* end GetSystemProperties */
3674
3675
3676 // property - pre-checked for NULL
3677 // value_ptr - pre-checked for NULL
3678 jvmtiError
3679 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3680 jvmtiError err = JVMTI_ERROR_NONE;
3681 const char *value;
3682
3683 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3684 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3685 if (value == NULL) {
3686 err = JVMTI_ERROR_NOT_AVAILABLE;
3687 } else {
3688 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3689 if (err == JVMTI_ERROR_NONE) {
3690 strcpy(*value_ptr, value);
3691 }
3692 }
3693 return err;
3694 } /* end GetSystemProperty */
3695
3696
3697 // property - pre-checked for NULL
3698 // value - NULL is a valid value, must be checked
3699 jvmtiError
3700 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3701 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3702
3703 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3704 if (strcmp(property, p->key()) == 0) {
3705 if (p->set_writeable_value(value_ptr)) {
3706 err = JVMTI_ERROR_NONE;
3707 }
3708 }
3709 }
3710 return err;
3711 } /* end SetSystemProperty */