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.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/fieldDescriptor.inline.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jfieldIDWorkaround.hpp"
62 #include "runtime/jniHandles.inline.hpp"
63 #include "runtime/objectMonitor.inline.hpp"
64 #include "runtime/osThread.hpp"
65 #include "runtime/reflectionUtils.hpp"
66 #include "runtime/signature.hpp"
67 #include "runtime/thread.inline.hpp"
68 #include "runtime/threadHeapSampler.hpp"
69 #include "runtime/threadSMR.hpp"
70 #include "runtime/timerTrace.hpp"
71 #include "runtime/vframe.inline.hpp"
72 #include "runtime/vmThread.hpp"
73 #include "services/threadService.hpp"
74 #include "utilities/exceptions.hpp"
75 #include "utilities/preserveException.hpp"
76
77
78 #define FIXLATER 0 // REMOVE this when completed.
79
80 // FIXLATER: hook into JvmtiTrace
81 #define TraceJVMTICalls false
82
83 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
84 }
85
86 JvmtiEnv::~JvmtiEnv() {
87 }
88
89 JvmtiEnv*
90 JvmtiEnv::create_a_jvmti(jint version) {
91 return new JvmtiEnv(version);
92 }
93
94 // VM operation class to copy jni function table at safepoint.
95 // More than one java threads or jvmti agents may be reading/
96 // modifying jni function tables. To reduce the risk of bad
97 // interaction b/w these threads it is copied at safepoint.
98 class VM_JNIFunctionTableCopier : public VM_Operation {
99 private:
100 const struct JNINativeInterface_ *_function_table;
101 public:
102 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
103 _function_table = func_tbl;
104 };
105
106 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
107 void doit() {
108 copy_jni_function_table(_function_table);
109 };
110 };
111
112 //
113 // Do not change the "prefix" marker below, everything above it is copied
114 // unchanged into the filled stub, everything below is controlled by the
115 // stub filler (only method bodies are carried forward, and then only for
116 // functionality still in the spec).
117 //
118 // end file prefix
119
120 //
121 // Memory Management functions
122 //
123
124 // mem_ptr - pre-checked for NULL
125 jvmtiError
126 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
127 return allocate(size, mem_ptr);
128 } /* end Allocate */
129
130
131 // mem - NULL is a valid value, must be checked
132 jvmtiError
133 JvmtiEnv::Deallocate(unsigned char* mem) {
134 return deallocate(mem);
135 } /* end Deallocate */
136
137 // Threads_lock NOT held, java_thread not protected by lock
138 // java_thread - pre-checked
139 // data - NULL is a valid value, must be checked
140 jvmtiError
141 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
142 JvmtiThreadState* state = java_thread->jvmti_thread_state();
143 if (state == NULL) {
144 if (data == NULL) {
145 // leaving state unset same as data set to NULL
146 return JVMTI_ERROR_NONE;
147 }
148 // otherwise, create the state
149 state = JvmtiThreadState::state_for(java_thread);
150 if (state == NULL) {
151 return JVMTI_ERROR_THREAD_NOT_ALIVE;
152 }
153 }
154 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
155 return JVMTI_ERROR_NONE;
156 } /* end SetThreadLocalStorage */
157
158
159 // Threads_lock NOT held
160 // thread - NOT pre-checked
161 // data_ptr - pre-checked for NULL
162 jvmtiError
163 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
164 JavaThread* current_thread = JavaThread::current();
165 if (thread == NULL) {
166 JvmtiThreadState* state = current_thread->jvmti_thread_state();
167 *data_ptr = (state == NULL) ? NULL :
168 state->env_thread_state(this)->get_agent_thread_local_storage_data();
169 } else {
170 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
171 // the thread to _thread_in_vm. However, when the TLS for a thread
172 // other than the current thread is required we need to transition
173 // from native so as to resolve the jthread.
174
175 ThreadInVMfromNative __tiv(current_thread);
176 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
177 debug_only(VMNativeEntryWrapper __vew;)
178
179 JavaThread* java_thread = NULL;
180 ThreadsListHandle tlh(current_thread);
181 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
182 if (err != JVMTI_ERROR_NONE) {
183 return err;
184 }
185
186 JvmtiThreadState* state = java_thread->jvmti_thread_state();
187 *data_ptr = (state == NULL) ? NULL :
188 state->env_thread_state(this)->get_agent_thread_local_storage_data();
189 }
190 return JVMTI_ERROR_NONE;
191 } /* end GetThreadLocalStorage */
192
193 //
194 // Module functions
195 //
196
197 // module_count_ptr - pre-checked for NULL
198 // modules_ptr - pre-checked for NULL
199 jvmtiError
200 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
201 JvmtiModuleClosure jmc;
202
203 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
204 } /* end GetAllModules */
205
206
207 // class_loader - NULL is a valid value, must be pre-checked
208 // package_name - pre-checked for NULL
209 // module_ptr - pre-checked for NULL
210 jvmtiError
211 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
212 JavaThread* THREAD = JavaThread::current(); // pass to macros
213 ResourceMark rm(THREAD);
214
215 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
216 // Check that loader is a subclass of java.lang.ClassLoader.
217 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
218 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
219 }
220 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
221 if (HAS_PENDING_EXCEPTION) {
222 CLEAR_PENDING_EXCEPTION;
223 return JVMTI_ERROR_INTERNAL; // unexpected exception
224 }
225 *module_ptr = module;
226 return JVMTI_ERROR_NONE;
227 } /* end GetNamedModule */
228
229
230 // module - pre-checked for NULL
231 // to_module - pre-checked for NULL
232 jvmtiError
233 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
234 JavaThread* THREAD = JavaThread::current();
235
236 // check module
237 Handle h_module(THREAD, JNIHandles::resolve(module));
238 if (!java_lang_Module::is_instance(h_module())) {
239 return JVMTI_ERROR_INVALID_MODULE;
240 }
241 // check to_module
242 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
243 if (!java_lang_Module::is_instance(h_to_module())) {
244 return JVMTI_ERROR_INVALID_MODULE;
245 }
246 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
247 } /* end AddModuleReads */
248
249
250 // module - pre-checked for NULL
251 // pkg_name - pre-checked for NULL
252 // to_module - pre-checked for NULL
253 jvmtiError
254 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
255 JavaThread* THREAD = JavaThread::current();
256 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
257
258 // check module
259 Handle h_module(THREAD, JNIHandles::resolve(module));
260 if (!java_lang_Module::is_instance(h_module())) {
261 return JVMTI_ERROR_INVALID_MODULE;
262 }
263 // check to_module
264 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
265 if (!java_lang_Module::is_instance(h_to_module())) {
266 return JVMTI_ERROR_INVALID_MODULE;
267 }
268 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
269 } /* end AddModuleExports */
270
271
272 // module - pre-checked for NULL
273 // pkg_name - pre-checked for NULL
274 // to_module - pre-checked for NULL
275 jvmtiError
276 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
277 JavaThread* THREAD = JavaThread::current();
278 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
279
280 // check module
281 Handle h_module(THREAD, JNIHandles::resolve(module));
282 if (!java_lang_Module::is_instance(h_module())) {
283 return JVMTI_ERROR_INVALID_MODULE;
284 }
285 // check to_module
286 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
287 if (!java_lang_Module::is_instance(h_to_module())) {
288 return JVMTI_ERROR_INVALID_MODULE;
289 }
290 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
291 } /* end AddModuleOpens */
292
293
294 // module - pre-checked for NULL
295 // service - pre-checked for NULL
296 jvmtiError
297 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
298 JavaThread* THREAD = JavaThread::current();
299
300 // check module
301 Handle h_module(THREAD, JNIHandles::resolve(module));
302 if (!java_lang_Module::is_instance(h_module())) {
303 return JVMTI_ERROR_INVALID_MODULE;
304 }
305 // check service
306 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
307 if (!java_lang_Class::is_instance(h_service()) ||
308 java_lang_Class::is_primitive(h_service())) {
309 return JVMTI_ERROR_INVALID_CLASS;
310 }
311 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
312 } /* end AddModuleUses */
313
314
315 // module - pre-checked for NULL
316 // service - pre-checked for NULL
317 // impl_class - pre-checked for NULL
318 jvmtiError
319 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
320 JavaThread* THREAD = JavaThread::current();
321
322 // check module
323 Handle h_module(THREAD, JNIHandles::resolve(module));
324 if (!java_lang_Module::is_instance(h_module())) {
325 return JVMTI_ERROR_INVALID_MODULE;
326 }
327 // check service
328 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
329 if (!java_lang_Class::is_instance(h_service()) ||
330 java_lang_Class::is_primitive(h_service())) {
331 return JVMTI_ERROR_INVALID_CLASS;
332 }
333 // check impl_class
334 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
335 if (!java_lang_Class::is_instance(h_impl_class()) ||
336 java_lang_Class::is_primitive(h_impl_class())) {
337 return JVMTI_ERROR_INVALID_CLASS;
338 }
339 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
340 } /* end AddModuleProvides */
341
342 // module - pre-checked for NULL
343 // is_modifiable_class_ptr - pre-checked for NULL
344 jvmtiError
345 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
346 JavaThread* THREAD = JavaThread::current();
347
348 // check module
349 Handle h_module(THREAD, JNIHandles::resolve(module));
350 if (!java_lang_Module::is_instance(h_module())) {
351 return JVMTI_ERROR_INVALID_MODULE;
352 }
353
354 *is_modifiable_module_ptr = JNI_TRUE;
355 return JVMTI_ERROR_NONE;
356 } /* end IsModifiableModule */
357
358
359 //
360 // Class functions
361 //
362
363 // class_count_ptr - pre-checked for NULL
364 // classes_ptr - pre-checked for NULL
365 jvmtiError
366 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
367 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
368 } /* end GetLoadedClasses */
369
370
371 // initiating_loader - NULL is a valid value, must be checked
372 // class_count_ptr - pre-checked for NULL
373 // classes_ptr - pre-checked for NULL
374 jvmtiError
375 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
376 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
377 class_count_ptr, classes_ptr);
378 } /* end GetClassLoaderClasses */
379
380 // k_mirror - may be primitive, this must be checked
381 // is_modifiable_class_ptr - pre-checked for NULL
382 jvmtiError
383 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
384 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
385 JNI_TRUE : JNI_FALSE;
386 return JVMTI_ERROR_NONE;
387 } /* end IsModifiableClass */
388
389 // class_count - pre-checked to be greater than or equal to 0
390 // classes - pre-checked for NULL
391 jvmtiError
392 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
393 //TODO: add locking
394
395 int index;
396 JavaThread* current_thread = JavaThread::current();
397 ResourceMark rm(current_thread);
398
399 jvmtiClassDefinition* class_definitions =
400 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
401 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
402
403 for (index = 0; index < class_count; index++) {
404 HandleMark hm(current_thread);
405
406 jclass jcls = classes[index];
407 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
408 if (k_mirror == NULL) {
409 return JVMTI_ERROR_INVALID_CLASS;
410 }
411 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
412 return JVMTI_ERROR_INVALID_CLASS;
413 }
414
415 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
416 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
417 }
418
419 Klass* klass = java_lang_Class::as_Klass(k_mirror);
420
421 jint status = klass->jvmti_class_status();
422 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
423 return JVMTI_ERROR_INVALID_CLASS;
424 }
425
426 InstanceKlass* ik = InstanceKlass::cast(klass);
427 if (ik->get_cached_class_file_bytes() == NULL) {
428 // Not cached, we need to reconstitute the class file from the
429 // VM representation. We don't attach the reconstituted class
430 // bytes to the InstanceKlass here because they have not been
431 // validated and we're not at a safepoint.
432 JvmtiClassFileReconstituter reconstituter(ik);
433 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
434 return reconstituter.get_error();
435 }
436
437 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
438 class_definitions[index].class_bytes = (unsigned char*)
439 reconstituter.class_file_bytes();
440 } else {
441 // it is cached, get it from the cache
442 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
443 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
444 }
445 class_definitions[index].klass = jcls;
446 }
447 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
448 VMThread::execute(&op);
449 return (op.check_error());
450 } /* end RetransformClasses */
451
452
453 // class_count - pre-checked to be greater than or equal to 0
454 // class_definitions - pre-checked for NULL
455 jvmtiError
456 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
457 //TODO: add locking
458 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
459 VMThread::execute(&op);
460 return (op.check_error());
461 } /* end RedefineClasses */
462
463
464 //
465 // Object functions
466 //
467
468 // size_ptr - pre-checked for NULL
469 jvmtiError
470 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
471 oop mirror = JNIHandles::resolve_external_guard(object);
472 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
473 *size_ptr = (jlong)Universe::heap()->obj_size(mirror) * wordSize;
474 return JVMTI_ERROR_NONE;
475 } /* end GetObjectSize */
476
477 //
478 // Method functions
479 //
480
481 // prefix - NULL is a valid value, must be checked
482 jvmtiError
483 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
484 return prefix == NULL?
485 SetNativeMethodPrefixes(0, NULL) :
486 SetNativeMethodPrefixes(1, (char**)&prefix);
487 } /* end SetNativeMethodPrefix */
488
489
490 // prefix_count - pre-checked to be greater than or equal to 0
491 // prefixes - pre-checked for NULL
492 jvmtiError
493 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
494 // Have to grab JVMTI thread state lock to be sure that some thread
495 // isn't accessing the prefixes at the same time we are setting them.
496 // No locks during VM bring-up.
497 if (Threads::number_of_threads() == 0) {
498 return set_native_method_prefixes(prefix_count, prefixes);
499 } else {
500 MutexLocker mu(JvmtiThreadState_lock);
501 return set_native_method_prefixes(prefix_count, prefixes);
502 }
503 } /* end SetNativeMethodPrefixes */
504
505 //
506 // Event Management functions
507 //
508
509 // callbacks - NULL is a valid value, must be checked
510 // size_of_callbacks - pre-checked to be greater than or equal to 0
511 jvmtiError
512 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
513 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
514 return JVMTI_ERROR_NONE;
515 } /* end SetEventCallbacks */
516
517
518 // event_thread - NULL is a valid value, must be checked
519 jvmtiError
520 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
521 if (event_thread == NULL) {
522 // Can be called at Agent_OnLoad() time with event_thread == NULL
523 // when Thread::current() does not work yet so we cannot create a
524 // ThreadsListHandle that is common to both thread-specific and
525 // global code paths.
526
527 // event_type must be valid
528 if (!JvmtiEventController::is_valid_event_type(event_type)) {
529 return JVMTI_ERROR_INVALID_EVENT_TYPE;
530 }
531
532 bool enabled = (mode == JVMTI_ENABLE);
533
534 // assure that needed capabilities are present
535 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
536 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
537 }
538
539 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
540 record_class_file_load_hook_enabled();
541 }
542
543 if (event_type == JVMTI_EVENT_SAMPLED_OBJECT_ALLOC) {
544 if (enabled) {
545 ThreadHeapSampler::enable();
546 } else {
547 ThreadHeapSampler::disable();
548 }
549 }
550 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
551 } else {
552 // We have a specified event_thread.
553 JavaThread* java_thread = NULL;
554 ThreadsListHandle tlh;
555 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
556 if (err != JVMTI_ERROR_NONE) {
557 return err;
558 }
559
560 // event_type must be valid
561 if (!JvmtiEventController::is_valid_event_type(event_type)) {
562 return JVMTI_ERROR_INVALID_EVENT_TYPE;
563 }
564
565 // global events cannot be controlled at thread level.
566 if (JvmtiEventController::is_global_event(event_type)) {
567 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
568 }
569
570 bool enabled = (mode == JVMTI_ENABLE);
571
572 // assure that needed capabilities are present
573 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
574 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
575 }
576
577 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
578 record_class_file_load_hook_enabled();
579 }
580 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
581 }
582
583 return JVMTI_ERROR_NONE;
584 } /* end SetEventNotificationMode */
585
586 //
587 // Capability functions
588 //
589
590 // capabilities_ptr - pre-checked for NULL
591 jvmtiError
592 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
593 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
594 get_prohibited_capabilities(),
595 capabilities_ptr);
596 return JVMTI_ERROR_NONE;
597 } /* end GetPotentialCapabilities */
598
599
600 // capabilities_ptr - pre-checked for NULL
601 jvmtiError
602 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
603 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
604 get_prohibited_capabilities(),
605 capabilities_ptr,
606 get_capabilities());
607 } /* end AddCapabilities */
608
609
610 // capabilities_ptr - pre-checked for NULL
611 jvmtiError
612 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
613 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
614 return JVMTI_ERROR_NONE;
615 } /* end RelinquishCapabilities */
616
617
618 // capabilities_ptr - pre-checked for NULL
619 jvmtiError
620 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
621 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
622 return JVMTI_ERROR_NONE;
623 } /* end GetCapabilities */
624
625 //
626 // Class Loader Search functions
627 //
628
629 // segment - pre-checked for NULL
630 jvmtiError
631 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
632 jvmtiPhase phase = get_phase();
633 if (phase == JVMTI_PHASE_ONLOAD) {
634 Arguments::append_sysclasspath(segment);
635 return JVMTI_ERROR_NONE;
636 } else if (use_version_1_0_semantics()) {
637 // This JvmtiEnv requested version 1.0 semantics and this function
638 // is only allowed in the ONLOAD phase in version 1.0 so we need to
639 // return an error here.
640 return JVMTI_ERROR_WRONG_PHASE;
641 } else if (phase == JVMTI_PHASE_LIVE) {
642 // The phase is checked by the wrapper that called this function,
643 // but this thread could be racing with the thread that is
644 // terminating the VM so we check one more time.
645
646 // create the zip entry
647 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
648 if (zip_entry == NULL) {
649 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
650 }
651
652 // lock the loader
653 Thread* thread = Thread::current();
654 HandleMark hm;
655 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
656
657 ObjectLocker ol(loader_lock, thread);
658
659 // add the jar file to the bootclasspath
660 log_info(class, load)("opened: %s", zip_entry->name());
661 #if INCLUDE_CDS
662 ClassLoaderExt::append_boot_classpath(zip_entry);
663 #else
664 ClassLoader::add_to_boot_append_entries(zip_entry);
665 #endif
666 return JVMTI_ERROR_NONE;
667 } else {
668 return JVMTI_ERROR_WRONG_PHASE;
669 }
670
671 } /* end AddToBootstrapClassLoaderSearch */
672
673
674 // segment - pre-checked for NULL
675 jvmtiError
676 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
677 jvmtiPhase phase = get_phase();
678
679 if (phase == JVMTI_PHASE_ONLOAD) {
680 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
681 if (strcmp("java.class.path", p->key()) == 0) {
682 p->append_value(segment);
683 break;
684 }
685 }
686 return JVMTI_ERROR_NONE;
687 } else if (phase == JVMTI_PHASE_LIVE) {
688 // The phase is checked by the wrapper that called this function,
689 // but this thread could be racing with the thread that is
690 // terminating the VM so we check one more time.
691 HandleMark hm;
692
693 // create the zip entry (which will open the zip file and hence
694 // check that the segment is indeed a zip file).
695 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
696 if (zip_entry == NULL) {
697 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
698 }
699 delete zip_entry; // no longer needed
700
701 // lock the loader
702 Thread* THREAD = Thread::current();
703 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
704
705 ObjectLocker ol(loader, THREAD);
706
707 // need the path as java.lang.String
708 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
709 if (HAS_PENDING_EXCEPTION) {
710 CLEAR_PENDING_EXCEPTION;
711 return JVMTI_ERROR_INTERNAL;
712 }
713
714 // Invoke the appendToClassPathForInstrumentation method - if the method
715 // is not found it means the loader doesn't support adding to the class path
716 // in the live phase.
717 {
718 JavaValue res(T_VOID);
719 JavaCalls::call_special(&res,
720 loader,
721 loader->klass(),
722 vmSymbols::appendToClassPathForInstrumentation_name(),
723 vmSymbols::appendToClassPathForInstrumentation_signature(),
724 path,
725 THREAD);
726 if (HAS_PENDING_EXCEPTION) {
727 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
728 CLEAR_PENDING_EXCEPTION;
729
730 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
731 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
732 } else {
733 return JVMTI_ERROR_INTERNAL;
734 }
735 }
736 }
737
738 return JVMTI_ERROR_NONE;
739 } else {
740 return JVMTI_ERROR_WRONG_PHASE;
741 }
742 } /* end AddToSystemClassLoaderSearch */
743
744 //
745 // General functions
746 //
747
748 // phase_ptr - pre-checked for NULL
749 jvmtiError
750 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
751 *phase_ptr = phase();
752 return JVMTI_ERROR_NONE;
753 } /* end GetPhase */
754
755
756 jvmtiError
757 JvmtiEnv::DisposeEnvironment() {
758 dispose();
759 return JVMTI_ERROR_NONE;
760 } /* end DisposeEnvironment */
761
762
763 // data - NULL is a valid value, must be checked
764 jvmtiError
765 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
766 set_env_local_storage(data);
767 return JVMTI_ERROR_NONE;
768 } /* end SetEnvironmentLocalStorage */
769
770
771 // data_ptr - pre-checked for NULL
772 jvmtiError
773 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
774 *data_ptr = (void*)get_env_local_storage();
775 return JVMTI_ERROR_NONE;
776 } /* end GetEnvironmentLocalStorage */
777
778 // version_ptr - pre-checked for NULL
779 jvmtiError
780 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
781 *version_ptr = JVMTI_VERSION;
782 return JVMTI_ERROR_NONE;
783 } /* end GetVersionNumber */
784
785
786 // name_ptr - pre-checked for NULL
787 jvmtiError
788 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
789 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
790 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
791 }
792 const char *name = JvmtiUtil::error_name(error);
793 if (name == NULL) {
794 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
795 }
796 size_t len = strlen(name) + 1;
797 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
798 if (err == JVMTI_ERROR_NONE) {
799 memcpy(*name_ptr, name, len);
800 }
801 return err;
802 } /* end GetErrorName */
803
804
805 jvmtiError
806 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
807 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
808 switch (flag) {
809 case JVMTI_VERBOSE_OTHER:
810 // ignore
811 break;
812 case JVMTI_VERBOSE_CLASS:
813 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
814 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
815 break;
816 case JVMTI_VERBOSE_GC:
817 if (value == 0) {
818 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
819 } else {
820 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
821 }
822 break;
823 case JVMTI_VERBOSE_JNI:
824 PrintJNIResolving = value != 0;
825 break;
826 default:
827 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
828 };
829 return JVMTI_ERROR_NONE;
830 } /* end SetVerboseFlag */
831
832
833 // format_ptr - pre-checked for NULL
834 jvmtiError
835 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
836 *format_ptr = JVMTI_JLOCATION_JVMBCI;
837 return JVMTI_ERROR_NONE;
838 } /* end GetJLocationFormat */
839
840 //
841 // Thread functions
842 //
843
844 // Threads_lock NOT held
845 // thread - NOT pre-checked
846 // thread_state_ptr - pre-checked for NULL
847 jvmtiError
848 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
849 JavaThread* current_thread = JavaThread::current();
850 JavaThread* java_thread = NULL;
851 oop thread_oop = NULL;
852 ThreadsListHandle tlh(current_thread);
853
854 if (thread == NULL) {
855 java_thread = current_thread;
856 thread_oop = java_thread->threadObj();
857
858 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
859 return JVMTI_ERROR_INVALID_THREAD;
860 }
861 } else {
862 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
863 if (err != JVMTI_ERROR_NONE) {
864 // We got an error code so we don't have a JavaThread *, but
865 // only return an error from here if we didn't get a valid
866 // thread_oop.
867 if (thread_oop == NULL) {
868 return err;
869 }
870 // We have a valid thread_oop so we can return some thread state.
871 }
872 }
873
874 // get most state bits
875 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
876
877 if (java_thread != NULL) {
878 // We have a JavaThread* so add more state bits.
879 JavaThreadState jts = java_thread->thread_state();
880
881 if (java_thread->is_being_ext_suspended()) {
882 state |= JVMTI_THREAD_STATE_SUSPENDED;
883 }
884 if (jts == _thread_in_native) {
885 state |= JVMTI_THREAD_STATE_IN_NATIVE;
886 }
887 OSThread* osThread = java_thread->osthread();
888 if (osThread != NULL && osThread->interrupted()) {
889 state |= JVMTI_THREAD_STATE_INTERRUPTED;
890 }
891 }
892
893 *thread_state_ptr = state;
894 return JVMTI_ERROR_NONE;
895 } /* end GetThreadState */
896
897
898 // thread_ptr - pre-checked for NULL
899 jvmtiError
900 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
901 JavaThread* current_thread = JavaThread::current();
902 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
903 return JVMTI_ERROR_NONE;
904 } /* end GetCurrentThread */
905
906
907 // threads_count_ptr - pre-checked for NULL
908 // threads_ptr - pre-checked for NULL
909 jvmtiError
910 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
911 int nthreads = 0;
912 Handle *thread_objs = NULL;
913 ResourceMark rm;
914 HandleMark hm;
915
916 // enumerate threads (including agent threads)
917 ThreadsListEnumerator tle(Thread::current(), true);
918 nthreads = tle.num_threads();
919 *threads_count_ptr = nthreads;
920
921 if (nthreads == 0) {
922 *threads_ptr = NULL;
923 return JVMTI_ERROR_NONE;
924 }
925
926 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
927 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
928
929 for (int i=0; i < nthreads; i++) {
930 thread_objs[i] = Handle(tle.get_threadObj(i));
931 }
932
933 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
934 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
935
936 *threads_ptr = jthreads;
937 return JVMTI_ERROR_NONE;
938 } /* end GetAllThreads */
939
940
941 // Threads_lock NOT held, java_thread not protected by lock
942 // java_thread - pre-checked
943 jvmtiError
944 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
945 // don't allow hidden thread suspend request.
946 if (java_thread->is_hidden_from_external_view()) {
947 return (JVMTI_ERROR_NONE);
948 }
949
950 {
951 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
952 if (java_thread->is_external_suspend()) {
953 // don't allow nested external suspend requests.
954 return (JVMTI_ERROR_THREAD_SUSPENDED);
955 }
956 if (java_thread->is_exiting()) { // thread is in the process of exiting
957 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
958 }
959 java_thread->set_external_suspend();
960 }
961
962 if (!JvmtiSuspendControl::suspend(java_thread)) {
963 // the thread was in the process of exiting
964 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
965 }
966 return JVMTI_ERROR_NONE;
967 } /* end SuspendThread */
968
969
970 // request_count - pre-checked to be greater than or equal to 0
971 // request_list - pre-checked for NULL
972 // results - pre-checked for NULL
973 jvmtiError
974 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
975 int needSafepoint = 0; // > 0 if we need a safepoint
976 ThreadsListHandle tlh;
977 for (int i = 0; i < request_count; i++) {
978 JavaThread *java_thread = NULL;
979 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
980 if (err != JVMTI_ERROR_NONE) {
981 results[i] = err;
982 continue;
983 }
984 // don't allow hidden thread suspend request.
985 if (java_thread->is_hidden_from_external_view()) {
986 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
987 continue;
988 }
989
990 {
991 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
992 if (java_thread->is_external_suspend()) {
993 // don't allow nested external suspend requests.
994 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
995 continue;
996 }
997 if (java_thread->is_exiting()) { // thread is in the process of exiting
998 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
999 continue;
1000 }
1001 java_thread->set_external_suspend();
1002 }
1003 if (java_thread->thread_state() == _thread_in_native) {
1004 // We need to try and suspend native threads here. Threads in
1005 // other states will self-suspend on their next transition.
1006 if (!JvmtiSuspendControl::suspend(java_thread)) {
1007 // The thread was in the process of exiting. Force another
1008 // safepoint to make sure that this thread transitions.
1009 needSafepoint++;
1010 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1011 continue;
1012 }
1013 } else {
1014 needSafepoint++;
1015 }
1016 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1017 }
1018 if (needSafepoint > 0) {
1019 VM_ThreadsSuspendJVMTI tsj;
1020 VMThread::execute(&tsj);
1021 }
1022 // per-thread suspend results returned via results parameter
1023 return JVMTI_ERROR_NONE;
1024 } /* end SuspendThreadList */
1025
1026
1027 // Threads_lock NOT held, java_thread not protected by lock
1028 // java_thread - pre-checked
1029 jvmtiError
1030 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1031 // don't allow hidden thread resume request.
1032 if (java_thread->is_hidden_from_external_view()) {
1033 return JVMTI_ERROR_NONE;
1034 }
1035
1036 if (!java_thread->is_being_ext_suspended()) {
1037 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1038 }
1039
1040 if (!JvmtiSuspendControl::resume(java_thread)) {
1041 return JVMTI_ERROR_INTERNAL;
1042 }
1043 return JVMTI_ERROR_NONE;
1044 } /* end ResumeThread */
1045
1046
1047 // request_count - pre-checked to be greater than or equal to 0
1048 // request_list - pre-checked for NULL
1049 // results - pre-checked for NULL
1050 jvmtiError
1051 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1052 ThreadsListHandle tlh;
1053 for (int i = 0; i < request_count; i++) {
1054 JavaThread* java_thread = NULL;
1055 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1056 if (err != JVMTI_ERROR_NONE) {
1057 results[i] = err;
1058 continue;
1059 }
1060 // don't allow hidden thread resume request.
1061 if (java_thread->is_hidden_from_external_view()) {
1062 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1063 continue;
1064 }
1065 if (!java_thread->is_being_ext_suspended()) {
1066 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1067 continue;
1068 }
1069
1070 if (!JvmtiSuspendControl::resume(java_thread)) {
1071 results[i] = JVMTI_ERROR_INTERNAL;
1072 continue;
1073 }
1074
1075 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1076 }
1077 // per-thread resume results returned via results parameter
1078 return JVMTI_ERROR_NONE;
1079 } /* end ResumeThreadList */
1080
1081
1082 // Threads_lock NOT held, java_thread not protected by lock
1083 // java_thread - pre-checked
1084 jvmtiError
1085 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1086 oop e = JNIHandles::resolve_external_guard(exception);
1087 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1088
1089 JavaThread::send_async_exception(java_thread->threadObj(), e);
1090
1091 return JVMTI_ERROR_NONE;
1092
1093 } /* end StopThread */
1094
1095
1096 // Threads_lock NOT held
1097 // thread - NOT pre-checked
1098 jvmtiError
1099 JvmtiEnv::InterruptThread(jthread thread) {
1100 // TODO: this is very similar to JVM_Interrupt(); share code in future
1101 JavaThread* current_thread = JavaThread::current();
1102 JavaThread* java_thread = NULL;
1103 ThreadsListHandle tlh(current_thread);
1104 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1105 if (err != JVMTI_ERROR_NONE) {
1106 return err;
1107 }
1108
1109 Thread::interrupt(java_thread);
1110
1111 return JVMTI_ERROR_NONE;
1112 } /* end InterruptThread */
1113
1114
1115 // Threads_lock NOT held
1116 // thread - NOT pre-checked
1117 // info_ptr - pre-checked for NULL
1118 jvmtiError
1119 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1120 ResourceMark rm;
1121 HandleMark hm;
1122
1123 JavaThread* current_thread = JavaThread::current();
1124 ThreadsListHandle tlh(current_thread);
1125
1126 // if thread is NULL the current thread is used
1127 oop thread_oop = NULL;
1128 if (thread == NULL) {
1129 thread_oop = current_thread->threadObj();
1130 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1131 return JVMTI_ERROR_INVALID_THREAD;
1132 }
1133 } else {
1134 JavaThread* java_thread = NULL;
1135 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1136 if (err != JVMTI_ERROR_NONE) {
1137 // We got an error code so we don't have a JavaThread *, but
1138 // only return an error from here if we didn't get a valid
1139 // thread_oop.
1140 if (thread_oop == NULL) {
1141 return err;
1142 }
1143 // We have a valid thread_oop so we can return some thread info.
1144 }
1145 }
1146
1147 Handle thread_obj(current_thread, thread_oop);
1148 Handle name;
1149 ThreadPriority priority;
1150 Handle thread_group;
1151 Handle context_class_loader;
1152 bool is_daemon;
1153
1154 { MutexLocker mu(Threads_lock);
1155
1156 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1157 priority = java_lang_Thread::priority(thread_obj());
1158 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1159 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1160
1161 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1162 context_class_loader = Handle(current_thread, loader);
1163 }
1164 { const char *n;
1165
1166 if (name() != NULL) {
1167 n = java_lang_String::as_utf8_string(name());
1168 } else {
1169 int utf8_length = 0;
1170 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1171 }
1172
1173 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1174 if (info_ptr->name == NULL)
1175 return JVMTI_ERROR_OUT_OF_MEMORY;
1176
1177 strcpy(info_ptr->name, n);
1178 }
1179 info_ptr->is_daemon = is_daemon;
1180 info_ptr->priority = priority;
1181
1182 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1183 jni_reference(context_class_loader);
1184 info_ptr->thread_group = jni_reference(thread_group);
1185
1186 return JVMTI_ERROR_NONE;
1187 } /* end GetThreadInfo */
1188
1189
1190 // Threads_lock NOT held, java_thread not protected by lock
1191 // java_thread - pre-checked
1192 // owned_monitor_count_ptr - pre-checked for NULL
1193 // owned_monitors_ptr - pre-checked for NULL
1194 jvmtiError
1195 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1196 jvmtiError err = JVMTI_ERROR_NONE;
1197 JavaThread* calling_thread = JavaThread::current();
1198
1199 // growable array of jvmti monitors info on the C-heap
1200 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1201 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1202
1203 // It is only safe to perform the direct operation on the current
1204 // thread. All other usage needs to use a vm-safepoint-op for safety.
1205 if (java_thread == calling_thread) {
1206 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1207 } else {
1208 // JVMTI get monitors info at safepoint. Do not require target thread to
1209 // be suspended.
1210 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1211 VMThread::execute(&op);
1212 err = op.result();
1213 }
1214 jint owned_monitor_count = owned_monitors_list->length();
1215 if (err == JVMTI_ERROR_NONE) {
1216 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1217 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1218 // copy into the returned array
1219 for (int i = 0; i < owned_monitor_count; i++) {
1220 (*owned_monitors_ptr)[i] =
1221 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1222 }
1223 *owned_monitor_count_ptr = owned_monitor_count;
1224 }
1225 }
1226 // clean up.
1227 for (int i = 0; i < owned_monitor_count; i++) {
1228 deallocate((unsigned char*)owned_monitors_list->at(i));
1229 }
1230 delete owned_monitors_list;
1231
1232 return err;
1233 } /* end GetOwnedMonitorInfo */
1234
1235
1236 // Threads_lock NOT held, java_thread not protected by lock
1237 // java_thread - pre-checked
1238 // monitor_info_count_ptr - pre-checked for NULL
1239 // monitor_info_ptr - pre-checked for NULL
1240 jvmtiError
1241 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1242 jvmtiError err = JVMTI_ERROR_NONE;
1243 JavaThread* calling_thread = JavaThread::current();
1244
1245 // growable array of jvmti monitors info on the C-heap
1246 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1247 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1248
1249 // It is only safe to perform the direct operation on the current
1250 // thread. All other usage needs to use a vm-safepoint-op for safety.
1251 if (java_thread == calling_thread) {
1252 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1253 } else {
1254 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1255 // be suspended.
1256 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1257 VMThread::execute(&op);
1258 err = op.result();
1259 }
1260
1261 jint owned_monitor_count = owned_monitors_list->length();
1262 if (err == JVMTI_ERROR_NONE) {
1263 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1264 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1265 // copy to output array.
1266 for (int i = 0; i < owned_monitor_count; i++) {
1267 (*monitor_info_ptr)[i].monitor =
1268 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1269 (*monitor_info_ptr)[i].stack_depth =
1270 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1271 }
1272 }
1273 *monitor_info_count_ptr = owned_monitor_count;
1274 }
1275
1276 // clean up.
1277 for (int i = 0; i < owned_monitor_count; i++) {
1278 deallocate((unsigned char*)owned_monitors_list->at(i));
1279 }
1280 delete owned_monitors_list;
1281
1282 return err;
1283 } /* end GetOwnedMonitorStackDepthInfo */
1284
1285
1286 // Threads_lock NOT held, java_thread not protected by lock
1287 // java_thread - pre-checked
1288 // monitor_ptr - pre-checked for NULL
1289 jvmtiError
1290 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1291 jvmtiError err = JVMTI_ERROR_NONE;
1292 JavaThread* calling_thread = JavaThread::current();
1293
1294 // It is only safe to perform the direct operation on the current
1295 // thread. All other usage needs to use a vm-safepoint-op for safety.
1296 if (java_thread == calling_thread) {
1297 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1298 } else {
1299 // get contended monitor information at safepoint.
1300 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1301 VMThread::execute(&op);
1302 err = op.result();
1303 }
1304 return err;
1305 } /* end GetCurrentContendedMonitor */
1306
1307
1308 // Threads_lock NOT held
1309 // thread - NOT pre-checked
1310 // proc - pre-checked for NULL
1311 // arg - NULL is a valid value, must be checked
1312 jvmtiError
1313 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1314 JavaThread* current_thread = JavaThread::current();
1315
1316 JavaThread* java_thread = NULL;
1317 oop thread_oop = NULL;
1318 ThreadsListHandle tlh(current_thread);
1319 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1320 if (err != JVMTI_ERROR_NONE) {
1321 // We got an error code so we don't have a JavaThread *, but
1322 // only return an error from here if we didn't get a valid
1323 // thread_oop.
1324 if (thread_oop == NULL) {
1325 return err;
1326 }
1327 // We have a valid thread_oop.
1328 }
1329
1330 if (java_thread != NULL) {
1331 // 'thread' refers to an existing JavaThread.
1332 return JVMTI_ERROR_INVALID_THREAD;
1333 }
1334
1335 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1336 return JVMTI_ERROR_INVALID_PRIORITY;
1337 }
1338
1339 Handle thread_hndl(current_thread, thread_oop);
1340 {
1341 MutexLocker mu(Threads_lock); // grab Threads_lock
1342
1343 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1344
1345 // At this point it may be possible that no osthread was created for the
1346 // JavaThread due to lack of memory.
1347 if (new_thread == NULL || new_thread->osthread() == NULL) {
1348 if (new_thread != NULL) {
1349 new_thread->smr_delete();
1350 }
1351 return JVMTI_ERROR_OUT_OF_MEMORY;
1352 }
1353
1354 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1355 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1356 java_lang_Thread::set_daemon(thread_hndl());
1357
1358 new_thread->set_threadObj(thread_hndl());
1359 Threads::add(new_thread);
1360 Thread::start(new_thread);
1361 } // unlock Threads_lock
1362
1363 return JVMTI_ERROR_NONE;
1364 } /* end RunAgentThread */
1365
1366 //
1367 // Thread Group functions
1368 //
1369
1370 // group_count_ptr - pre-checked for NULL
1371 // groups_ptr - pre-checked for NULL
1372 jvmtiError
1373 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1374 JavaThread* current_thread = JavaThread::current();
1375
1376 // Only one top level thread group now.
1377 *group_count_ptr = 1;
1378
1379 // Allocate memory to store global-refs to the thread groups.
1380 // Assume this area is freed by caller.
1381 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1382
1383 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1384
1385 // Convert oop to Handle, then convert Handle to global-ref.
1386 {
1387 HandleMark hm(current_thread);
1388 Handle system_thread_group(current_thread, Universe::system_thread_group());
1389 *groups_ptr[0] = jni_reference(system_thread_group);
1390 }
1391
1392 return JVMTI_ERROR_NONE;
1393 } /* end GetTopThreadGroups */
1394
1395
1396 // info_ptr - pre-checked for NULL
1397 jvmtiError
1398 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1399 ResourceMark rm;
1400 HandleMark hm;
1401
1402 JavaThread* current_thread = JavaThread::current();
1403
1404 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1405 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1406
1407 const char* name;
1408 Handle parent_group;
1409 bool is_daemon;
1410 ThreadPriority max_priority;
1411
1412 { MutexLocker mu(Threads_lock);
1413
1414 name = java_lang_ThreadGroup::name(group_obj());
1415 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1416 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1417 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1418 }
1419
1420 info_ptr->is_daemon = is_daemon;
1421 info_ptr->max_priority = max_priority;
1422 info_ptr->parent = jni_reference(parent_group);
1423
1424 if (name != NULL) {
1425 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1426 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1427 strcpy(info_ptr->name, name);
1428 } else {
1429 info_ptr->name = NULL;
1430 }
1431
1432 return JVMTI_ERROR_NONE;
1433 } /* end GetThreadGroupInfo */
1434
1435
1436 // thread_count_ptr - pre-checked for NULL
1437 // threads_ptr - pre-checked for NULL
1438 // group_count_ptr - pre-checked for NULL
1439 // groups_ptr - pre-checked for NULL
1440 jvmtiError
1441 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1442 JavaThread* current_thread = JavaThread::current();
1443 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1444 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1445
1446 Handle *thread_objs = NULL;
1447 Handle *group_objs = NULL;
1448 int nthreads = 0;
1449 int ngroups = 0;
1450 int hidden_threads = 0;
1451
1452 ResourceMark rm(current_thread);
1453 HandleMark hm(current_thread);
1454
1455 Handle group_hdl(current_thread, group_obj);
1456
1457 { // Cannot allow thread or group counts to change.
1458 MutexLocker mu(Threads_lock);
1459
1460 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1461 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1462
1463 if (nthreads > 0) {
1464 ThreadsListHandle tlh(current_thread);
1465 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1466 assert(nthreads <= threads->length(), "too many threads");
1467 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1468 for (int i=0, j=0; i<nthreads; i++) {
1469 oop thread_obj = threads->obj_at(i);
1470 assert(thread_obj != NULL, "thread_obj is NULL");
1471 JavaThread *java_thread = NULL;
1472 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1473 if (err == JVMTI_ERROR_NONE) {
1474 // Have a valid JavaThread*.
1475 if (java_thread->is_hidden_from_external_view()) {
1476 // Filter out hidden java threads.
1477 hidden_threads++;
1478 continue;
1479 }
1480 } else {
1481 // We couldn't convert thread_obj into a JavaThread*.
1482 if (err == JVMTI_ERROR_INVALID_THREAD) {
1483 // The thread_obj does not refer to a java.lang.Thread object
1484 // so skip it.
1485 hidden_threads++;
1486 continue;
1487 }
1488 // We have a valid thread_obj, but no JavaThread*; the caller
1489 // can still have limited use for the thread_obj.
1490 }
1491 thread_objs[j++] = Handle(current_thread, thread_obj);
1492 }
1493 nthreads -= hidden_threads;
1494 } // ThreadsListHandle is destroyed here.
1495
1496 if (ngroups > 0) {
1497 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1498 assert(ngroups <= groups->length(), "too many groups");
1499 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1500 for (int i=0; i<ngroups; i++) {
1501 oop group_obj = groups->obj_at(i);
1502 assert(group_obj != NULL, "group_obj != NULL");
1503 group_objs[i] = Handle(current_thread, group_obj);
1504 }
1505 }
1506 }
1507
1508 // have to make global handles outside of Threads_lock
1509 *group_count_ptr = ngroups;
1510 *thread_count_ptr = nthreads;
1511 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1512 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1513 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1514 return JVMTI_ERROR_OUT_OF_MEMORY;
1515 }
1516 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1517 return JVMTI_ERROR_OUT_OF_MEMORY;
1518 }
1519
1520 return JVMTI_ERROR_NONE;
1521 } /* end GetThreadGroupChildren */
1522
1523
1524 //
1525 // Stack Frame functions
1526 //
1527
1528 // Threads_lock NOT held, java_thread not protected by lock
1529 // java_thread - pre-checked
1530 // max_frame_count - pre-checked to be greater than or equal to 0
1531 // frame_buffer - pre-checked for NULL
1532 // count_ptr - pre-checked for NULL
1533 jvmtiError
1534 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1535 jvmtiError err = JVMTI_ERROR_NONE;
1536
1537 // It is only safe to perform the direct operation on the current
1538 // thread. All other usage needs to use a vm-safepoint-op for safety.
1539 if (java_thread == JavaThread::current()) {
1540 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1541 } else {
1542 // JVMTI get stack trace at safepoint. Do not require target thread to
1543 // be suspended.
1544 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1545 VMThread::execute(&op);
1546 err = op.result();
1547 }
1548
1549 return err;
1550 } /* end GetStackTrace */
1551
1552
1553 // max_frame_count - pre-checked to be greater than or equal to 0
1554 // stack_info_ptr - pre-checked for NULL
1555 // thread_count_ptr - pre-checked for NULL
1556 jvmtiError
1557 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1558 jvmtiError err = JVMTI_ERROR_NONE;
1559 JavaThread* calling_thread = JavaThread::current();
1560
1561 // JVMTI get stack traces at safepoint.
1562 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1563 VMThread::execute(&op);
1564 *thread_count_ptr = op.final_thread_count();
1565 *stack_info_ptr = op.stack_info();
1566 err = op.result();
1567 return err;
1568 } /* end GetAllStackTraces */
1569
1570
1571 // thread_count - pre-checked to be greater than or equal to 0
1572 // thread_list - pre-checked for NULL
1573 // max_frame_count - pre-checked to be greater than or equal to 0
1574 // stack_info_ptr - pre-checked for NULL
1575 jvmtiError
1576 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1577 jvmtiError err = JVMTI_ERROR_NONE;
1578 // JVMTI get stack traces at safepoint.
1579 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1580 VMThread::execute(&op);
1581 err = op.result();
1582 if (err == JVMTI_ERROR_NONE) {
1583 *stack_info_ptr = op.stack_info();
1584 }
1585 return err;
1586 } /* end GetThreadListStackTraces */
1587
1588
1589 // Threads_lock NOT held, java_thread not protected by lock
1590 // java_thread - pre-checked
1591 // count_ptr - pre-checked for NULL
1592 jvmtiError
1593 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1594 jvmtiError err = JVMTI_ERROR_NONE;
1595
1596 // retrieve or create JvmtiThreadState.
1597 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1598 if (state == NULL) {
1599 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1600 }
1601
1602 // It is only safe to perform the direct operation on the current
1603 // thread. All other usage needs to use a vm-safepoint-op for safety.
1604 if (java_thread == JavaThread::current()) {
1605 err = get_frame_count(state, count_ptr);
1606 } else {
1607 // get java stack frame count at safepoint.
1608 VM_GetFrameCount op(this, state, count_ptr);
1609 VMThread::execute(&op);
1610 err = op.result();
1611 }
1612 return err;
1613 } /* end GetFrameCount */
1614
1615
1616 // Threads_lock NOT held, java_thread not protected by lock
1617 // java_thread - pre-checked
1618 jvmtiError
1619 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1620 JavaThread* current_thread = JavaThread::current();
1621 HandleMark hm(current_thread);
1622 uint32_t debug_bits = 0;
1623
1624 // retrieve or create the state
1625 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1626 if (state == NULL) {
1627 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1628 }
1629
1630 // Check if java_thread is fully suspended
1631 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1632 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1633 }
1634 // Check to see if a PopFrame was already in progress
1635 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1636 // Probably possible for JVMTI clients to trigger this, but the
1637 // JPDA backend shouldn't allow this to happen
1638 return JVMTI_ERROR_INTERNAL;
1639 }
1640
1641 {
1642 // Was workaround bug
1643 // 4812902: popFrame hangs if the method is waiting at a synchronize
1644 // Catch this condition and return an error to avoid hanging.
1645 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1646 OSThread* osThread = java_thread->osthread();
1647 if (osThread->get_state() == MONITOR_WAIT) {
1648 return JVMTI_ERROR_OPAQUE_FRAME;
1649 }
1650 }
1651
1652 {
1653 ResourceMark rm(current_thread);
1654 // Check if there are more than one Java frame in this thread, that the top two frames
1655 // are Java (not native) frames, and that there is no intervening VM frame
1656 int frame_count = 0;
1657 bool is_interpreted[2];
1658 intptr_t *frame_sp[2];
1659 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1660 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1661 methodHandle mh(current_thread, vfs.method());
1662 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1663 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1664 frame_sp[frame_count] = vfs.frame_id();
1665 if (++frame_count > 1) break;
1666 }
1667 if (frame_count < 2) {
1668 // We haven't found two adjacent non-native Java frames on the top.
1669 // There can be two situations here:
1670 // 1. There are no more java frames
1671 // 2. Two top java frames are separated by non-java native frames
1672 if(vframeFor(java_thread, 1) == NULL) {
1673 return JVMTI_ERROR_NO_MORE_FRAMES;
1674 } else {
1675 // Intervening non-java native or VM frames separate java frames.
1676 // Current implementation does not support this. See bug #5031735.
1677 // In theory it is possible to pop frames in such cases.
1678 return JVMTI_ERROR_OPAQUE_FRAME;
1679 }
1680 }
1681
1682 // If any of the top 2 frames is a compiled one, need to deoptimize it
1683 for (int i = 0; i < 2; i++) {
1684 if (!is_interpreted[i]) {
1685 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1686 }
1687 }
1688
1689 // Update the thread state to reflect that the top frame is popped
1690 // so that cur_stack_depth is maintained properly and all frameIDs
1691 // are invalidated.
1692 // The current frame will be popped later when the suspended thread
1693 // is resumed and right before returning from VM to Java.
1694 // (see call_VM_base() in assembler_<cpu>.cpp).
1695
1696 // It's fine to update the thread state here because no JVMTI events
1697 // shall be posted for this PopFrame.
1698
1699 // It is only safe to perform the direct operation on the current
1700 // thread. All other usage needs to use a vm-safepoint-op for safety.
1701 if (java_thread == JavaThread::current()) {
1702 state->update_for_pop_top_frame();
1703 } else {
1704 VM_UpdateForPopTopFrame op(state);
1705 VMThread::execute(&op);
1706 jvmtiError err = op.result();
1707 if (err != JVMTI_ERROR_NONE) {
1708 return err;
1709 }
1710 }
1711
1712 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1713 // Set pending step flag for this popframe and it is cleared when next
1714 // step event is posted.
1715 state->set_pending_step_for_popframe();
1716 }
1717
1718 return JVMTI_ERROR_NONE;
1719 } /* end PopFrame */
1720
1721
1722 // Threads_lock NOT held, java_thread not protected by lock
1723 // java_thread - pre-checked
1724 // java_thread - unchecked
1725 // depth - pre-checked as non-negative
1726 // method_ptr - pre-checked for NULL
1727 // location_ptr - pre-checked for NULL
1728 jvmtiError
1729 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1730 jvmtiError err = JVMTI_ERROR_NONE;
1731
1732 // It is only safe to perform the direct operation on the current
1733 // thread. All other usage needs to use a vm-safepoint-op for safety.
1734 if (java_thread == JavaThread::current()) {
1735 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1736 } else {
1737 // JVMTI get java stack frame location at safepoint.
1738 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1739 VMThread::execute(&op);
1740 err = op.result();
1741 }
1742 return err;
1743 } /* end GetFrameLocation */
1744
1745
1746 // Threads_lock NOT held, java_thread not protected by lock
1747 // java_thread - pre-checked
1748 // java_thread - unchecked
1749 // depth - pre-checked as non-negative
1750 jvmtiError
1751 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1752 jvmtiError err = JVMTI_ERROR_NONE;
1753 ResourceMark rm;
1754 uint32_t debug_bits = 0;
1755
1756 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1757 if (state == NULL) {
1758 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1759 }
1760
1761 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1762 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1763 }
1764
1765 if (TraceJVMTICalls) {
1766 JvmtiSuspendControl::print();
1767 }
1768
1769 vframe *vf = vframeFor(java_thread, depth);
1770 if (vf == NULL) {
1771 return JVMTI_ERROR_NO_MORE_FRAMES;
1772 }
1773
1774 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1775 return JVMTI_ERROR_OPAQUE_FRAME;
1776 }
1777
1778 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1779
1780 // It is only safe to perform the direct operation on the current
1781 // thread. All other usage needs to use a vm-safepoint-op for safety.
1782 if (java_thread == JavaThread::current()) {
1783 int frame_number = state->count_frames() - depth;
1784 state->env_thread_state(this)->set_frame_pop(frame_number);
1785 } else {
1786 VM_SetFramePop op(this, state, depth);
1787 VMThread::execute(&op);
1788 err = op.result();
1789 }
1790 return err;
1791 } /* end NotifyFramePop */
1792
1793
1794 //
1795 // Force Early Return functions
1796 //
1797
1798 // Threads_lock NOT held, java_thread not protected by lock
1799 // java_thread - pre-checked
1800 jvmtiError
1801 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1802 jvalue val;
1803 val.l = value;
1804 return force_early_return(java_thread, val, atos);
1805 } /* end ForceEarlyReturnObject */
1806
1807
1808 // Threads_lock NOT held, java_thread not protected by lock
1809 // java_thread - pre-checked
1810 jvmtiError
1811 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1812 jvalue val;
1813 val.i = value;
1814 return force_early_return(java_thread, val, itos);
1815 } /* end ForceEarlyReturnInt */
1816
1817
1818 // Threads_lock NOT held, java_thread not protected by lock
1819 // java_thread - pre-checked
1820 jvmtiError
1821 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1822 jvalue val;
1823 val.j = value;
1824 return force_early_return(java_thread, val, ltos);
1825 } /* end ForceEarlyReturnLong */
1826
1827
1828 // Threads_lock NOT held, java_thread not protected by lock
1829 // java_thread - pre-checked
1830 jvmtiError
1831 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1832 jvalue val;
1833 val.f = value;
1834 return force_early_return(java_thread, val, ftos);
1835 } /* end ForceEarlyReturnFloat */
1836
1837
1838 // Threads_lock NOT held, java_thread not protected by lock
1839 // java_thread - pre-checked
1840 jvmtiError
1841 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1842 jvalue val;
1843 val.d = value;
1844 return force_early_return(java_thread, val, dtos);
1845 } /* end ForceEarlyReturnDouble */
1846
1847
1848 // Threads_lock NOT held, java_thread not protected by lock
1849 // java_thread - pre-checked
1850 jvmtiError
1851 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1852 jvalue val;
1853 val.j = 0L;
1854 return force_early_return(java_thread, val, vtos);
1855 } /* end ForceEarlyReturnVoid */
1856
1857
1858 //
1859 // Heap functions
1860 //
1861
1862 // klass - NULL is a valid value, must be checked
1863 // initial_object - NULL is a valid value, must be checked
1864 // callbacks - pre-checked for NULL
1865 // user_data - NULL is a valid value, must be checked
1866 jvmtiError
1867 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1868 // check klass if provided
1869 Klass* k = NULL;
1870 if (klass != NULL) {
1871 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1872 if (k_mirror == NULL) {
1873 return JVMTI_ERROR_INVALID_CLASS;
1874 }
1875 if (java_lang_Class::is_primitive(k_mirror)) {
1876 return JVMTI_ERROR_NONE;
1877 }
1878 k = java_lang_Class::as_Klass(k_mirror);
1879 if (klass == NULL) {
1880 return JVMTI_ERROR_INVALID_CLASS;
1881 }
1882 }
1883
1884 if (initial_object != NULL) {
1885 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1886 if (init_obj == NULL) {
1887 return JVMTI_ERROR_INVALID_OBJECT;
1888 }
1889 }
1890
1891 Thread *thread = Thread::current();
1892 HandleMark hm(thread);
1893
1894 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1895 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1896 return JVMTI_ERROR_NONE;
1897 } /* end FollowReferences */
1898
1899
1900 // klass - NULL is a valid value, must be checked
1901 // callbacks - pre-checked for NULL
1902 // user_data - NULL is a valid value, must be checked
1903 jvmtiError
1904 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1905 // check klass if provided
1906 Klass* k = NULL;
1907 if (klass != NULL) {
1908 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1909 if (k_mirror == NULL) {
1910 return JVMTI_ERROR_INVALID_CLASS;
1911 }
1912 if (java_lang_Class::is_primitive(k_mirror)) {
1913 return JVMTI_ERROR_NONE;
1914 }
1915 k = java_lang_Class::as_Klass(k_mirror);
1916 if (k == NULL) {
1917 return JVMTI_ERROR_INVALID_CLASS;
1918 }
1919 }
1920
1921 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1922 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1923 return JVMTI_ERROR_NONE;
1924 } /* end IterateThroughHeap */
1925
1926
1927 // tag_ptr - pre-checked for NULL
1928 jvmtiError
1929 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1930 oop o = JNIHandles::resolve_external_guard(object);
1931 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1932 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1933 return JVMTI_ERROR_NONE;
1934 } /* end GetTag */
1935
1936
1937 jvmtiError
1938 JvmtiEnv::SetTag(jobject object, jlong tag) {
1939 oop o = JNIHandles::resolve_external_guard(object);
1940 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1941 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1942 return JVMTI_ERROR_NONE;
1943 } /* end SetTag */
1944
1945
1946 // tag_count - pre-checked to be greater than or equal to 0
1947 // tags - pre-checked for NULL
1948 // count_ptr - pre-checked for NULL
1949 // object_result_ptr - NULL is a valid value, must be checked
1950 // tag_result_ptr - NULL is a valid value, must be checked
1951 jvmtiError
1952 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1953 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1954 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1955 } /* end GetObjectsWithTags */
1956
1957
1958 jvmtiError
1959 JvmtiEnv::ForceGarbageCollection() {
1960 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1961 return JVMTI_ERROR_NONE;
1962 } /* end ForceGarbageCollection */
1963
1964
1965 //
1966 // Heap (1.0) functions
1967 //
1968
1969 // object_reference_callback - pre-checked for NULL
1970 // user_data - NULL is a valid value, must be checked
1971 jvmtiError
1972 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1973 oop o = JNIHandles::resolve_external_guard(object);
1974 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1975 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1976 return JVMTI_ERROR_NONE;
1977 } /* end IterateOverObjectsReachableFromObject */
1978
1979
1980 // heap_root_callback - NULL is a valid value, must be checked
1981 // stack_ref_callback - NULL is a valid value, must be checked
1982 // object_ref_callback - NULL is a valid value, must be checked
1983 // user_data - NULL is a valid value, must be checked
1984 jvmtiError
1985 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1986 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1987 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1988 return JVMTI_ERROR_NONE;
1989 } /* end IterateOverReachableObjects */
1990
1991
1992 // heap_object_callback - pre-checked for NULL
1993 // user_data - NULL is a valid value, must be checked
1994 jvmtiError
1995 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1996 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1997 Thread *thread = Thread::current();
1998 HandleMark hm(thread);
1999 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
2000 return JVMTI_ERROR_NONE;
2001 } /* end IterateOverHeap */
2002
2003
2004 // k_mirror - may be primitive, this must be checked
2005 // heap_object_callback - pre-checked for NULL
2006 // user_data - NULL is a valid value, must be checked
2007 jvmtiError
2008 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2009 if (java_lang_Class::is_primitive(k_mirror)) {
2010 // DO PRIMITIVE CLASS PROCESSING
2011 return JVMTI_ERROR_NONE;
2012 }
2013 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2014 if (klass == NULL) {
2015 return JVMTI_ERROR_INVALID_CLASS;
2016 }
2017 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2018 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2019 return JVMTI_ERROR_NONE;
2020 } /* end IterateOverInstancesOfClass */
2021
2022
2023 //
2024 // Local Variable functions
2025 //
2026
2027 // Threads_lock NOT held, java_thread not protected by lock
2028 // java_thread - pre-checked
2029 // java_thread - unchecked
2030 // depth - pre-checked as non-negative
2031 // value_ptr - pre-checked for NULL
2032 jvmtiError
2033 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2034 JavaThread* current_thread = JavaThread::current();
2035 // rm object is created to clean up the javaVFrame created in
2036 // doit_prologue(), but after doit() is finished with it.
2037 ResourceMark rm(current_thread);
2038
2039 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2040 VMThread::execute(&op);
2041 jvmtiError err = op.result();
2042 if (err != JVMTI_ERROR_NONE) {
2043 return err;
2044 } else {
2045 *value_ptr = op.value().l;
2046 return JVMTI_ERROR_NONE;
2047 }
2048 } /* end GetLocalObject */
2049
2050 // Threads_lock NOT held, java_thread not protected by lock
2051 // java_thread - pre-checked
2052 // java_thread - unchecked
2053 // depth - pre-checked as non-negative
2054 // value - pre-checked for NULL
2055 jvmtiError
2056 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2057 JavaThread* current_thread = JavaThread::current();
2058 // rm object is created to clean up the javaVFrame created in
2059 // doit_prologue(), but after doit() is finished with it.
2060 ResourceMark rm(current_thread);
2061
2062 VM_GetReceiver op(java_thread, current_thread, depth);
2063 VMThread::execute(&op);
2064 jvmtiError err = op.result();
2065 if (err != JVMTI_ERROR_NONE) {
2066 return err;
2067 } else {
2068 *value_ptr = op.value().l;
2069 return JVMTI_ERROR_NONE;
2070 }
2071 } /* end GetLocalInstance */
2072
2073
2074 // Threads_lock NOT held, java_thread not protected by lock
2075 // java_thread - pre-checked
2076 // java_thread - unchecked
2077 // depth - pre-checked as non-negative
2078 // value_ptr - pre-checked for NULL
2079 jvmtiError
2080 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2081 // rm object is created to clean up the javaVFrame created in
2082 // doit_prologue(), but after doit() is finished with it.
2083 ResourceMark rm;
2084
2085 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2086 VMThread::execute(&op);
2087 *value_ptr = op.value().i;
2088 return op.result();
2089 } /* end GetLocalInt */
2090
2091
2092 // Threads_lock NOT held, java_thread not protected by lock
2093 // java_thread - pre-checked
2094 // java_thread - unchecked
2095 // depth - pre-checked as non-negative
2096 // value_ptr - pre-checked for NULL
2097 jvmtiError
2098 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2099 // rm object is created to clean up the javaVFrame created in
2100 // doit_prologue(), but after doit() is finished with it.
2101 ResourceMark rm;
2102
2103 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2104 VMThread::execute(&op);
2105 *value_ptr = op.value().j;
2106 return op.result();
2107 } /* end GetLocalLong */
2108
2109
2110 // Threads_lock NOT held, java_thread not protected by lock
2111 // java_thread - pre-checked
2112 // java_thread - unchecked
2113 // depth - pre-checked as non-negative
2114 // value_ptr - pre-checked for NULL
2115 jvmtiError
2116 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2117 // rm object is created to clean up the javaVFrame created in
2118 // doit_prologue(), but after doit() is finished with it.
2119 ResourceMark rm;
2120
2121 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2122 VMThread::execute(&op);
2123 *value_ptr = op.value().f;
2124 return op.result();
2125 } /* end GetLocalFloat */
2126
2127
2128 // Threads_lock NOT held, java_thread not protected by lock
2129 // java_thread - pre-checked
2130 // java_thread - unchecked
2131 // depth - pre-checked as non-negative
2132 // value_ptr - pre-checked for NULL
2133 jvmtiError
2134 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2135 // rm object is created to clean up the javaVFrame created in
2136 // doit_prologue(), but after doit() is finished with it.
2137 ResourceMark rm;
2138
2139 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2140 VMThread::execute(&op);
2141 *value_ptr = op.value().d;
2142 return op.result();
2143 } /* end GetLocalDouble */
2144
2145
2146 // Threads_lock NOT held, java_thread not protected by lock
2147 // java_thread - pre-checked
2148 // java_thread - unchecked
2149 // depth - pre-checked as non-negative
2150 jvmtiError
2151 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2152 // rm object is created to clean up the javaVFrame created in
2153 // doit_prologue(), but after doit() is finished with it.
2154 ResourceMark rm;
2155 jvalue val;
2156 val.l = value;
2157 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2158 VMThread::execute(&op);
2159 return op.result();
2160 } /* end SetLocalObject */
2161
2162
2163 // Threads_lock NOT held, java_thread not protected by lock
2164 // java_thread - pre-checked
2165 // java_thread - unchecked
2166 // depth - pre-checked as non-negative
2167 jvmtiError
2168 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2169 // rm object is created to clean up the javaVFrame created in
2170 // doit_prologue(), but after doit() is finished with it.
2171 ResourceMark rm;
2172 jvalue val;
2173 val.i = value;
2174 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2175 VMThread::execute(&op);
2176 return op.result();
2177 } /* end SetLocalInt */
2178
2179
2180 // Threads_lock NOT held, java_thread not protected by lock
2181 // java_thread - pre-checked
2182 // java_thread - unchecked
2183 // depth - pre-checked as non-negative
2184 jvmtiError
2185 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2186 // rm object is created to clean up the javaVFrame created in
2187 // doit_prologue(), but after doit() is finished with it.
2188 ResourceMark rm;
2189 jvalue val;
2190 val.j = value;
2191 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2192 VMThread::execute(&op);
2193 return op.result();
2194 } /* end SetLocalLong */
2195
2196
2197 // Threads_lock NOT held, java_thread not protected by lock
2198 // java_thread - pre-checked
2199 // java_thread - unchecked
2200 // depth - pre-checked as non-negative
2201 jvmtiError
2202 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2203 // rm object is created to clean up the javaVFrame created in
2204 // doit_prologue(), but after doit() is finished with it.
2205 ResourceMark rm;
2206 jvalue val;
2207 val.f = value;
2208 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2209 VMThread::execute(&op);
2210 return op.result();
2211 } /* end SetLocalFloat */
2212
2213
2214 // Threads_lock NOT held, java_thread not protected by lock
2215 // java_thread - pre-checked
2216 // java_thread - unchecked
2217 // depth - pre-checked as non-negative
2218 jvmtiError
2219 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2220 // rm object is created to clean up the javaVFrame created in
2221 // doit_prologue(), but after doit() is finished with it.
2222 ResourceMark rm;
2223 jvalue val;
2224 val.d = value;
2225 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2226 VMThread::execute(&op);
2227 return op.result();
2228 } /* end SetLocalDouble */
2229
2230
2231 //
2232 // Breakpoint functions
2233 //
2234
2235 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2236 jvmtiError
2237 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2238 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2239 if (location < 0) { // simple invalid location check first
2240 return JVMTI_ERROR_INVALID_LOCATION;
2241 }
2242 // verify that the breakpoint is not past the end of the method
2243 if (location >= (jlocation) method_oop->code_size()) {
2244 return JVMTI_ERROR_INVALID_LOCATION;
2245 }
2246
2247 ResourceMark rm;
2248 JvmtiBreakpoint bp(method_oop, location);
2249 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2250 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2251 return JVMTI_ERROR_DUPLICATE;
2252
2253 if (TraceJVMTICalls) {
2254 jvmti_breakpoints.print();
2255 }
2256
2257 return JVMTI_ERROR_NONE;
2258 } /* end SetBreakpoint */
2259
2260
2261 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2262 jvmtiError
2263 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2264 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2265
2266 if (location < 0) { // simple invalid location check first
2267 return JVMTI_ERROR_INVALID_LOCATION;
2268 }
2269
2270 // verify that the breakpoint is not past the end of the method
2271 if (location >= (jlocation) method_oop->code_size()) {
2272 return JVMTI_ERROR_INVALID_LOCATION;
2273 }
2274
2275 JvmtiBreakpoint bp(method_oop, location);
2276
2277 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2278 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2279 return JVMTI_ERROR_NOT_FOUND;
2280
2281 if (TraceJVMTICalls) {
2282 jvmti_breakpoints.print();
2283 }
2284
2285 return JVMTI_ERROR_NONE;
2286 } /* end ClearBreakpoint */
2287
2288
2289 //
2290 // Watched Field functions
2291 //
2292
2293 jvmtiError
2294 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2295 // make sure we haven't set this watch before
2296 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2297 fdesc_ptr->set_is_field_access_watched(true);
2298
2299 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2300
2301 return JVMTI_ERROR_NONE;
2302 } /* end SetFieldAccessWatch */
2303
2304
2305 jvmtiError
2306 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2307 // make sure we have a watch to clear
2308 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2309 fdesc_ptr->set_is_field_access_watched(false);
2310
2311 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2312
2313 return JVMTI_ERROR_NONE;
2314 } /* end ClearFieldAccessWatch */
2315
2316
2317 jvmtiError
2318 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2319 // make sure we haven't set this watch before
2320 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2321 fdesc_ptr->set_is_field_modification_watched(true);
2322
2323 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2324
2325 return JVMTI_ERROR_NONE;
2326 } /* end SetFieldModificationWatch */
2327
2328
2329 jvmtiError
2330 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2331 // make sure we have a watch to clear
2332 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2333 fdesc_ptr->set_is_field_modification_watched(false);
2334
2335 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2336
2337 return JVMTI_ERROR_NONE;
2338 } /* end ClearFieldModificationWatch */
2339
2340 //
2341 // Class functions
2342 //
2343
2344
2345 // k_mirror - may be primitive, this must be checked
2346 // signature_ptr - NULL is a valid value, must be checked
2347 // generic_ptr - NULL is a valid value, must be checked
2348 jvmtiError
2349 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2350 ResourceMark rm;
2351 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2352 Klass* k = NULL;
2353 if (!isPrimitive) {
2354 k = java_lang_Class::as_Klass(k_mirror);
2355 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2356 }
2357 if (signature_ptr != NULL) {
2358 char* result = NULL;
2359 if (isPrimitive) {
2360 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2361 result = (char*) jvmtiMalloc(2);
2362 result[0] = tchar;
2363 result[1] = '\0';
2364 } else {
2365 const char* class_sig = k->signature_name();
2366 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2367 strcpy(result, class_sig);
2368 }
2369 *signature_ptr = result;
2370 }
2371 if (generic_ptr != NULL) {
2372 *generic_ptr = NULL;
2373 if (!isPrimitive && k->is_instance_klass()) {
2374 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2375 if (soo != NULL) {
2376 const char *gen_sig = soo->as_C_string();
2377 if (gen_sig != NULL) {
2378 char* gen_result;
2379 jvmtiError err = allocate(strlen(gen_sig) + 1,
2380 (unsigned char **)&gen_result);
2381 if (err != JVMTI_ERROR_NONE) {
2382 return err;
2383 }
2384 strcpy(gen_result, gen_sig);
2385 *generic_ptr = gen_result;
2386 }
2387 }
2388 }
2389 }
2390 return JVMTI_ERROR_NONE;
2391 } /* end GetClassSignature */
2392
2393
2394 // k_mirror - may be primitive, this must be checked
2395 // status_ptr - pre-checked for NULL
2396 jvmtiError
2397 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2398 jint result = 0;
2399 if (java_lang_Class::is_primitive(k_mirror)) {
2400 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2401 } else {
2402 Klass* k = java_lang_Class::as_Klass(k_mirror);
2403 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2404 result = k->jvmti_class_status();
2405 }
2406 *status_ptr = result;
2407
2408 return JVMTI_ERROR_NONE;
2409 } /* end GetClassStatus */
2410
2411
2412 // k_mirror - may be primitive, this must be checked
2413 // source_name_ptr - pre-checked for NULL
2414 jvmtiError
2415 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2416 if (java_lang_Class::is_primitive(k_mirror)) {
2417 return JVMTI_ERROR_ABSENT_INFORMATION;
2418 }
2419 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2420 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2421
2422 if (!k_klass->is_instance_klass()) {
2423 return JVMTI_ERROR_ABSENT_INFORMATION;
2424 }
2425
2426 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2427 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2428 {
2429 JavaThread* current_thread = JavaThread::current();
2430 ResourceMark rm(current_thread);
2431 const char* sfncp = (const char*) sfnOop->as_C_string();
2432 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2433 strcpy(*source_name_ptr, sfncp);
2434 }
2435
2436 return JVMTI_ERROR_NONE;
2437 } /* end GetSourceFileName */
2438
2439
2440 // k_mirror - may be primitive, this must be checked
2441 // modifiers_ptr - pre-checked for NULL
2442 jvmtiError
2443 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2444 JavaThread* current_thread = JavaThread::current();
2445 jint result = 0;
2446 if (!java_lang_Class::is_primitive(k_mirror)) {
2447 Klass* k = java_lang_Class::as_Klass(k_mirror);
2448 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2449 result = k->compute_modifier_flags(current_thread);
2450 JavaThread* THREAD = current_thread; // pass to macros
2451 if (HAS_PENDING_EXCEPTION) {
2452 CLEAR_PENDING_EXCEPTION;
2453 return JVMTI_ERROR_INTERNAL;
2454 };
2455
2456 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2457 if(k->is_super()) {
2458 result |= JVM_ACC_SUPER;
2459 }
2460 } else {
2461 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2462 }
2463 *modifiers_ptr = result;
2464
2465 return JVMTI_ERROR_NONE;
2466 } /* end GetClassModifiers */
2467
2468
2469 // k_mirror - may be primitive, this must be checked
2470 // method_count_ptr - pre-checked for NULL
2471 // methods_ptr - pre-checked for NULL
2472 jvmtiError
2473 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2474 JavaThread* current_thread = JavaThread::current();
2475 HandleMark hm(current_thread);
2476
2477 if (java_lang_Class::is_primitive(k_mirror)) {
2478 *method_count_ptr = 0;
2479 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2480 return JVMTI_ERROR_NONE;
2481 }
2482 Klass* k = java_lang_Class::as_Klass(k_mirror);
2483 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2484
2485 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2486 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2487 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2488 }
2489
2490 if (!k->is_instance_klass()) {
2491 *method_count_ptr = 0;
2492 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2493 return JVMTI_ERROR_NONE;
2494 }
2495 InstanceKlass* ik = InstanceKlass::cast(k);
2496 // Allocate the result and fill it in
2497 int result_length = ik->methods()->length();
2498 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2499 int index;
2500 bool jmethodids_found = true;
2501
2502 if (JvmtiExport::can_maintain_original_method_order()) {
2503 // Use the original method ordering indices stored in the class, so we can emit
2504 // jmethodIDs in the order they appeared in the class file
2505 for (index = 0; index < result_length; index++) {
2506 Method* m = ik->methods()->at(index);
2507 int original_index = ik->method_ordering()->at(index);
2508 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2509 jmethodID id;
2510 if (jmethodids_found) {
2511 id = m->find_jmethod_id_or_null();
2512 if (id == NULL) {
2513 // If we find an uninitialized value, make sure there is
2514 // enough space for all the uninitialized values we might
2515 // find.
2516 ik->ensure_space_for_methodids(index);
2517 jmethodids_found = false;
2518 id = m->jmethod_id();
2519 }
2520 } else {
2521 id = m->jmethod_id();
2522 }
2523 result_list[original_index] = id;
2524 }
2525 } else {
2526 // otherwise just copy in any order
2527 for (index = 0; index < result_length; index++) {
2528 Method* m = ik->methods()->at(index);
2529 jmethodID id;
2530 if (jmethodids_found) {
2531 id = m->find_jmethod_id_or_null();
2532 if (id == NULL) {
2533 // If we find an uninitialized value, make sure there is
2534 // enough space for all the uninitialized values we might
2535 // find.
2536 ik->ensure_space_for_methodids(index);
2537 jmethodids_found = false;
2538 id = m->jmethod_id();
2539 }
2540 } else {
2541 id = m->jmethod_id();
2542 }
2543 result_list[index] = id;
2544 }
2545 }
2546 // Fill in return value.
2547 *method_count_ptr = result_length;
2548 *methods_ptr = result_list;
2549
2550 return JVMTI_ERROR_NONE;
2551 } /* end GetClassMethods */
2552
2553
2554 // k_mirror - may be primitive, this must be checked
2555 // field_count_ptr - pre-checked for NULL
2556 // fields_ptr - pre-checked for NULL
2557 jvmtiError
2558 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2559 if (java_lang_Class::is_primitive(k_mirror)) {
2560 *field_count_ptr = 0;
2561 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2562 return JVMTI_ERROR_NONE;
2563 }
2564 JavaThread* current_thread = JavaThread::current();
2565 HandleMark hm(current_thread);
2566 Klass* k = java_lang_Class::as_Klass(k_mirror);
2567 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2568
2569 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2570 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2571 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2572 }
2573
2574 if (!k->is_instance_klass()) {
2575 *field_count_ptr = 0;
2576 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2577 return JVMTI_ERROR_NONE;
2578 }
2579
2580
2581 InstanceKlass* ik = InstanceKlass::cast(k);
2582
2583 int result_count = 0;
2584 // First, count the fields.
2585 FilteredFieldStream flds(ik, true, true);
2586 result_count = flds.field_count();
2587
2588 // Allocate the result and fill it in
2589 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2590 // The JVMTI spec requires fields in the order they occur in the class file,
2591 // this is the reverse order of what FieldStream hands out.
2592 int id_index = (result_count - 1);
2593
2594 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2595 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2596 ik, src_st.offset(),
2597 src_st.access_flags().is_static());
2598 }
2599 assert(id_index == -1, "just checking");
2600 // Fill in the results
2601 *field_count_ptr = result_count;
2602 *fields_ptr = result_list;
2603
2604 return JVMTI_ERROR_NONE;
2605 } /* end GetClassFields */
2606
2607
2608 // k_mirror - may be primitive, this must be checked
2609 // interface_count_ptr - pre-checked for NULL
2610 // interfaces_ptr - pre-checked for NULL
2611 jvmtiError
2612 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2613 {
2614 if (java_lang_Class::is_primitive(k_mirror)) {
2615 *interface_count_ptr = 0;
2616 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2617 return JVMTI_ERROR_NONE;
2618 }
2619 JavaThread* current_thread = JavaThread::current();
2620 HandleMark hm(current_thread);
2621 Klass* k = java_lang_Class::as_Klass(k_mirror);
2622 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2623
2624 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2625 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2626 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2627
2628 if (!k->is_instance_klass()) {
2629 *interface_count_ptr = 0;
2630 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2631 return JVMTI_ERROR_NONE;
2632 }
2633
2634 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2635 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2636 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2637 for (int i_index = 0; i_index < result_length; i_index += 1) {
2638 InstanceKlass* klass_at = interface_list->at(i_index);
2639 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2640 assert(klass_at->is_interface(), "interfaces must be interfaces");
2641 oop mirror_at = klass_at->java_mirror();
2642 Handle handle_at = Handle(current_thread, mirror_at);
2643 result_list[i_index] = (jclass) jni_reference(handle_at);
2644 }
2645 *interface_count_ptr = result_length;
2646 *interfaces_ptr = result_list;
2647 }
2648
2649 return JVMTI_ERROR_NONE;
2650 } /* end GetImplementedInterfaces */
2651
2652
2653 // k_mirror - may be primitive, this must be checked
2654 // minor_version_ptr - pre-checked for NULL
2655 // major_version_ptr - pre-checked for NULL
2656 jvmtiError
2657 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2658 if (java_lang_Class::is_primitive(k_mirror)) {
2659 return JVMTI_ERROR_ABSENT_INFORMATION;
2660 }
2661 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2662
2663 jint status = klass->jvmti_class_status();
2664 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2665 return JVMTI_ERROR_INVALID_CLASS;
2666 }
2667 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2668 return JVMTI_ERROR_ABSENT_INFORMATION;
2669 }
2670
2671 InstanceKlass* ik = InstanceKlass::cast(klass);
2672 *minor_version_ptr = ik->minor_version();
2673 *major_version_ptr = ik->major_version();
2674
2675 return JVMTI_ERROR_NONE;
2676 } /* end GetClassVersionNumbers */
2677
2678
2679 // k_mirror - may be primitive, this must be checked
2680 // constant_pool_count_ptr - pre-checked for NULL
2681 // constant_pool_byte_count_ptr - pre-checked for NULL
2682 // constant_pool_bytes_ptr - pre-checked for NULL
2683 jvmtiError
2684 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2685 if (java_lang_Class::is_primitive(k_mirror)) {
2686 return JVMTI_ERROR_ABSENT_INFORMATION;
2687 }
2688
2689 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2690 Thread *thread = Thread::current();
2691 ResourceMark rm(thread);
2692
2693 jint status = klass->jvmti_class_status();
2694 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2695 return JVMTI_ERROR_INVALID_CLASS;
2696 }
2697 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2698 return JVMTI_ERROR_ABSENT_INFORMATION;
2699 }
2700
2701 InstanceKlass* ik = InstanceKlass::cast(klass);
2702 JvmtiConstantPoolReconstituter reconstituter(ik);
2703 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2704 return reconstituter.get_error();
2705 }
2706
2707 unsigned char *cpool_bytes;
2708 int cpool_size = reconstituter.cpool_size();
2709 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2710 return reconstituter.get_error();
2711 }
2712 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2713 if (res != JVMTI_ERROR_NONE) {
2714 return res;
2715 }
2716 reconstituter.copy_cpool_bytes(cpool_bytes);
2717 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2718 return reconstituter.get_error();
2719 }
2720
2721 constantPoolHandle constants(thread, ik->constants());
2722 *constant_pool_count_ptr = constants->length();
2723 *constant_pool_byte_count_ptr = cpool_size;
2724 *constant_pool_bytes_ptr = cpool_bytes;
2725
2726 return JVMTI_ERROR_NONE;
2727 } /* end GetConstantPool */
2728
2729
2730 // k_mirror - may be primitive, this must be checked
2731 // is_interface_ptr - pre-checked for NULL
2732 jvmtiError
2733 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2734 {
2735 bool result = false;
2736 if (!java_lang_Class::is_primitive(k_mirror)) {
2737 Klass* k = java_lang_Class::as_Klass(k_mirror);
2738 if (k != NULL && k->is_interface()) {
2739 result = true;
2740 }
2741 }
2742 *is_interface_ptr = result;
2743 }
2744
2745 return JVMTI_ERROR_NONE;
2746 } /* end IsInterface */
2747
2748
2749 // k_mirror - may be primitive, this must be checked
2750 // is_array_class_ptr - pre-checked for NULL
2751 jvmtiError
2752 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2753 {
2754 bool result = false;
2755 if (!java_lang_Class::is_primitive(k_mirror)) {
2756 Klass* k = java_lang_Class::as_Klass(k_mirror);
2757 if (k != NULL && k->is_array_klass()) {
2758 result = true;
2759 }
2760 }
2761 *is_array_class_ptr = result;
2762 }
2763
2764 return JVMTI_ERROR_NONE;
2765 } /* end IsArrayClass */
2766
2767
2768 // k_mirror - may be primitive, this must be checked
2769 // classloader_ptr - pre-checked for NULL
2770 jvmtiError
2771 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2772 {
2773 if (java_lang_Class::is_primitive(k_mirror)) {
2774 *classloader_ptr = (jclass) jni_reference(Handle());
2775 return JVMTI_ERROR_NONE;
2776 }
2777 JavaThread* current_thread = JavaThread::current();
2778 HandleMark hm(current_thread);
2779 Klass* k = java_lang_Class::as_Klass(k_mirror);
2780 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2781
2782 oop result_oop = k->class_loader();
2783 if (result_oop == NULL) {
2784 *classloader_ptr = (jclass) jni_reference(Handle());
2785 return JVMTI_ERROR_NONE;
2786 }
2787 Handle result_handle = Handle(current_thread, result_oop);
2788 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2789 *classloader_ptr = result_jnihandle;
2790 }
2791 return JVMTI_ERROR_NONE;
2792 } /* end GetClassLoader */
2793
2794
2795 // k_mirror - may be primitive, this must be checked
2796 // source_debug_extension_ptr - pre-checked for NULL
2797 jvmtiError
2798 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2799 {
2800 if (java_lang_Class::is_primitive(k_mirror)) {
2801 return JVMTI_ERROR_ABSENT_INFORMATION;
2802 }
2803 Klass* k = java_lang_Class::as_Klass(k_mirror);
2804 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2805 if (!k->is_instance_klass()) {
2806 return JVMTI_ERROR_ABSENT_INFORMATION;
2807 }
2808 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2809 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2810
2811 {
2812 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2813 strcpy(*source_debug_extension_ptr, sde);
2814 }
2815 }
2816
2817 return JVMTI_ERROR_NONE;
2818 } /* end GetSourceDebugExtension */
2819
2820 //
2821 // Object functions
2822 //
2823
2824 // hash_code_ptr - pre-checked for NULL
2825 jvmtiError
2826 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2827 oop mirror = JNIHandles::resolve_external_guard(object);
2828 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2829 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2830
2831 {
2832 jint result = (jint) mirror->identity_hash();
2833 *hash_code_ptr = result;
2834 }
2835 return JVMTI_ERROR_NONE;
2836 } /* end GetObjectHashCode */
2837
2838
2839 // info_ptr - pre-checked for NULL
2840 jvmtiError
2841 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2842 JavaThread* calling_thread = JavaThread::current();
2843 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2844 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2845 // Some of the critical threads were not suspended. go to a safepoint and try again
2846 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2847 VMThread::execute(&op);
2848 err = op.result();
2849 }
2850 return err;
2851 } /* end GetObjectMonitorUsage */
2852
2853
2854 //
2855 // Field functions
2856 //
2857
2858 // name_ptr - NULL is a valid value, must be checked
2859 // signature_ptr - NULL is a valid value, must be checked
2860 // generic_ptr - NULL is a valid value, must be checked
2861 jvmtiError
2862 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2863 JavaThread* current_thread = JavaThread::current();
2864 ResourceMark rm(current_thread);
2865 if (name_ptr == NULL) {
2866 // just don't return the name
2867 } else {
2868 const char* fieldName = fdesc_ptr->name()->as_C_string();
2869 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2870 if (*name_ptr == NULL)
2871 return JVMTI_ERROR_OUT_OF_MEMORY;
2872 strcpy(*name_ptr, fieldName);
2873 }
2874 if (signature_ptr== NULL) {
2875 // just don't return the signature
2876 } else {
2877 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2878 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2879 if (*signature_ptr == NULL)
2880 return JVMTI_ERROR_OUT_OF_MEMORY;
2881 strcpy(*signature_ptr, fieldSignature);
2882 }
2883 if (generic_ptr != NULL) {
2884 *generic_ptr = NULL;
2885 Symbol* soop = fdesc_ptr->generic_signature();
2886 if (soop != NULL) {
2887 const char* gen_sig = soop->as_C_string();
2888 if (gen_sig != NULL) {
2889 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2890 if (err != JVMTI_ERROR_NONE) {
2891 return err;
2892 }
2893 strcpy(*generic_ptr, gen_sig);
2894 }
2895 }
2896 }
2897 return JVMTI_ERROR_NONE;
2898 } /* end GetFieldName */
2899
2900
2901 // declaring_class_ptr - pre-checked for NULL
2902 jvmtiError
2903 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2904
2905 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2906 return JVMTI_ERROR_NONE;
2907 } /* end GetFieldDeclaringClass */
2908
2909
2910 // modifiers_ptr - pre-checked for NULL
2911 jvmtiError
2912 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2913
2914 AccessFlags resultFlags = fdesc_ptr->access_flags();
2915 jint result = resultFlags.as_int();
2916 *modifiers_ptr = result;
2917
2918 return JVMTI_ERROR_NONE;
2919 } /* end GetFieldModifiers */
2920
2921
2922 // is_synthetic_ptr - pre-checked for NULL
2923 jvmtiError
2924 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2925 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2926 return JVMTI_ERROR_NONE;
2927 } /* end IsFieldSynthetic */
2928
2929
2930 //
2931 // Method functions
2932 //
2933
2934 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2935 // name_ptr - NULL is a valid value, must be checked
2936 // signature_ptr - NULL is a valid value, must be checked
2937 // generic_ptr - NULL is a valid value, must be checked
2938 jvmtiError
2939 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2940 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2941 JavaThread* current_thread = JavaThread::current();
2942
2943 ResourceMark rm(current_thread); // get the utf8 name and signature
2944 if (name_ptr == NULL) {
2945 // just don't return the name
2946 } else {
2947 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2948 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2949 strcpy(*name_ptr, utf8_name);
2950 }
2951 if (signature_ptr == NULL) {
2952 // just don't return the signature
2953 } else {
2954 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2955 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2956 strcpy(*signature_ptr, utf8_signature);
2957 }
2958
2959 if (generic_ptr != NULL) {
2960 *generic_ptr = NULL;
2961 Symbol* soop = method_oop->generic_signature();
2962 if (soop != NULL) {
2963 const char* gen_sig = soop->as_C_string();
2964 if (gen_sig != NULL) {
2965 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2966 if (err != JVMTI_ERROR_NONE) {
2967 return err;
2968 }
2969 strcpy(*generic_ptr, gen_sig);
2970 }
2971 }
2972 }
2973 return JVMTI_ERROR_NONE;
2974 } /* end GetMethodName */
2975
2976
2977 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2978 // declaring_class_ptr - pre-checked for NULL
2979 jvmtiError
2980 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2981 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2982 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2983 return JVMTI_ERROR_NONE;
2984 } /* end GetMethodDeclaringClass */
2985
2986
2987 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2988 // modifiers_ptr - pre-checked for NULL
2989 jvmtiError
2990 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2991 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2992 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2993 return JVMTI_ERROR_NONE;
2994 } /* end GetMethodModifiers */
2995
2996
2997 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2998 // max_ptr - pre-checked for NULL
2999 jvmtiError
3000 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
3001 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3002 // get max stack
3003 (*max_ptr) = method_oop->max_locals();
3004 return JVMTI_ERROR_NONE;
3005 } /* end GetMaxLocals */
3006
3007
3008 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3009 // size_ptr - pre-checked for NULL
3010 jvmtiError
3011 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3012 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3013 // get size of arguments
3014
3015 (*size_ptr) = method_oop->size_of_parameters();
3016 return JVMTI_ERROR_NONE;
3017 } /* end GetArgumentsSize */
3018
3019
3020 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3021 // entry_count_ptr - pre-checked for NULL
3022 // table_ptr - pre-checked for NULL
3023 jvmtiError
3024 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3025 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3026 if (!method_oop->has_linenumber_table()) {
3027 return (JVMTI_ERROR_ABSENT_INFORMATION);
3028 }
3029
3030 // The line number table is compressed so we don't know how big it is until decompressed.
3031 // Decompression is really fast so we just do it twice.
3032
3033 // Compute size of table
3034 jint num_entries = 0;
3035 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3036 while (stream.read_pair()) {
3037 num_entries++;
3038 }
3039 jvmtiLineNumberEntry *jvmti_table =
3040 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3041
3042 // Fill jvmti table
3043 if (num_entries > 0) {
3044 int index = 0;
3045 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3046 while (stream.read_pair()) {
3047 jvmti_table[index].start_location = (jlocation) stream.bci();
3048 jvmti_table[index].line_number = (jint) stream.line();
3049 index++;
3050 }
3051 assert(index == num_entries, "sanity check");
3052 }
3053
3054 // Set up results
3055 (*entry_count_ptr) = num_entries;
3056 (*table_ptr) = jvmti_table;
3057
3058 return JVMTI_ERROR_NONE;
3059 } /* end GetLineNumberTable */
3060
3061
3062 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3063 // start_location_ptr - pre-checked for NULL
3064 // end_location_ptr - pre-checked for NULL
3065 jvmtiError
3066 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3067
3068 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3069 // get start and end location
3070 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3071 if (method_oop->code_size() == 0) {
3072 // there is no code so there is no start location
3073 (*start_location_ptr) = (jlocation)(-1);
3074 } else {
3075 (*start_location_ptr) = (jlocation)(0);
3076 }
3077
3078 return JVMTI_ERROR_NONE;
3079 } /* end GetMethodLocation */
3080
3081
3082 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3083 // entry_count_ptr - pre-checked for NULL
3084 // table_ptr - pre-checked for NULL
3085 jvmtiError
3086 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3087
3088 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3089 JavaThread* current_thread = JavaThread::current();
3090
3091 // does the klass have any local variable information?
3092 InstanceKlass* ik = method_oop->method_holder();
3093 if (!ik->access_flags().has_localvariable_table()) {
3094 return (JVMTI_ERROR_ABSENT_INFORMATION);
3095 }
3096
3097 ConstantPool* constants = method_oop->constants();
3098 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3099
3100 // in the vm localvariable table representation, 6 consecutive elements in the table
3101 // represent a 6-tuple of shorts
3102 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3103 jint num_entries = method_oop->localvariable_table_length();
3104 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3105 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3106
3107 if (num_entries > 0) {
3108 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3109 for (int i = 0; i < num_entries; i++) {
3110 // get the 5 tuple information from the vm table
3111 jlocation start_location = (jlocation) table[i].start_bci;
3112 jint length = (jint) table[i].length;
3113 int name_index = (int) table[i].name_cp_index;
3114 int signature_index = (int) table[i].descriptor_cp_index;
3115 int generic_signature_index = (int) table[i].signature_cp_index;
3116 jint slot = (jint) table[i].slot;
3117
3118 // get utf8 name and signature
3119 char *name_buf = NULL;
3120 char *sig_buf = NULL;
3121 char *gen_sig_buf = NULL;
3122 {
3123 ResourceMark rm(current_thread);
3124
3125 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3126 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3127 strcpy(name_buf, utf8_name);
3128
3129 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3130 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3131 strcpy(sig_buf, utf8_signature);
3132
3133 if (generic_signature_index > 0) {
3134 const char *utf8_gen_sign = (const char *)
3135 constants->symbol_at(generic_signature_index)->as_utf8();
3136 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3137 strcpy(gen_sig_buf, utf8_gen_sign);
3138 }
3139 }
3140
3141 // fill in the jvmti local variable table
3142 jvmti_table[i].start_location = start_location;
3143 jvmti_table[i].length = length;
3144 jvmti_table[i].name = name_buf;
3145 jvmti_table[i].signature = sig_buf;
3146 jvmti_table[i].generic_signature = gen_sig_buf;
3147 jvmti_table[i].slot = slot;
3148 }
3149 }
3150
3151 // set results
3152 (*entry_count_ptr) = num_entries;
3153 (*table_ptr) = jvmti_table;
3154
3155 return JVMTI_ERROR_NONE;
3156 } /* end GetLocalVariableTable */
3157
3158
3159 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3160 // bytecode_count_ptr - pre-checked for NULL
3161 // bytecodes_ptr - pre-checked for NULL
3162 jvmtiError
3163 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3164 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3165
3166 HandleMark hm;
3167 methodHandle method(method_oop);
3168 jint size = (jint)method->code_size();
3169 jvmtiError err = allocate(size, bytecodes_ptr);
3170 if (err != JVMTI_ERROR_NONE) {
3171 return err;
3172 }
3173
3174 (*bytecode_count_ptr) = size;
3175 // get byte codes
3176 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3177
3178 return JVMTI_ERROR_NONE;
3179 } /* end GetBytecodes */
3180
3181
3182 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3183 // is_native_ptr - pre-checked for NULL
3184 jvmtiError
3185 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3186 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3187 (*is_native_ptr) = method_oop->is_native();
3188 return JVMTI_ERROR_NONE;
3189 } /* end IsMethodNative */
3190
3191
3192 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3193 // is_synthetic_ptr - pre-checked for NULL
3194 jvmtiError
3195 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3196 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3197 (*is_synthetic_ptr) = method_oop->is_synthetic();
3198 return JVMTI_ERROR_NONE;
3199 } /* end IsMethodSynthetic */
3200
3201
3202 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3203 // is_obsolete_ptr - pre-checked for NULL
3204 jvmtiError
3205 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3206 if (use_version_1_0_semantics() &&
3207 get_capabilities()->can_redefine_classes == 0) {
3208 // This JvmtiEnv requested version 1.0 semantics and this function
3209 // requires the can_redefine_classes capability in version 1.0 so
3210 // we need to return an error here.
3211 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3212 }
3213
3214 if (method_oop == NULL || method_oop->is_obsolete()) {
3215 *is_obsolete_ptr = true;
3216 } else {
3217 *is_obsolete_ptr = false;
3218 }
3219 return JVMTI_ERROR_NONE;
3220 } /* end IsMethodObsolete */
3221
3222 //
3223 // Raw Monitor functions
3224 //
3225
3226 // name - pre-checked for NULL
3227 // monitor_ptr - pre-checked for NULL
3228 jvmtiError
3229 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3230 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3231 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3232
3233 *monitor_ptr = (jrawMonitorID)rmonitor;
3234
3235 return JVMTI_ERROR_NONE;
3236 } /* end CreateRawMonitor */
3237
3238
3239 // rmonitor - pre-checked for validity
3240 jvmtiError
3241 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3242 if (Threads::number_of_threads() == 0) {
3243 // Remove this monitor from pending raw monitors list
3244 // if it has entered in onload or start phase.
3245 JvmtiPendingMonitors::destroy(rmonitor);
3246 } else {
3247 Thread* thread = Thread::current();
3248 if (rmonitor->is_entered(thread)) {
3249 // The caller owns this monitor which we are about to destroy.
3250 // We exit the underlying synchronization object so that the
3251 // "delete monitor" call below can work without an assertion
3252 // failure on systems that don't like destroying synchronization
3253 // objects that are locked.
3254 int r;
3255 intptr_t recursion = rmonitor->recursions();
3256 for (intptr_t i=0; i <= recursion; i++) {
3257 r = rmonitor->raw_exit(thread);
3258 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3259 if (r != ObjectMonitor::OM_OK) { // robustness
3260 return JVMTI_ERROR_INTERNAL;
3261 }
3262 }
3263 }
3264 if (rmonitor->owner() != NULL) {
3265 // The caller is trying to destroy a monitor that is locked by
3266 // someone else. While this is not forbidden by the JVMTI
3267 // spec, it will cause an assertion failure on systems that don't
3268 // like destroying synchronization objects that are locked.
3269 // We indicate a problem with the error return (and leak the
3270 // monitor's memory).
3271 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3272 }
3273 }
3274
3275 delete rmonitor;
3276
3277 return JVMTI_ERROR_NONE;
3278 } /* end DestroyRawMonitor */
3279
3280
3281 // rmonitor - pre-checked for validity
3282 jvmtiError
3283 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3284 if (Threads::number_of_threads() == 0) {
3285 // No JavaThreads exist so ObjectMonitor enter cannot be
3286 // used, add this raw monitor to the pending list.
3287 // The pending monitors will be actually entered when
3288 // the VM is setup.
3289 // See transition_pending_raw_monitors in create_vm()
3290 // in thread.cpp.
3291 JvmtiPendingMonitors::enter(rmonitor);
3292 } else {
3293 int r = 0;
3294 Thread* thread = Thread::current();
3295
3296 if (thread->is_Java_thread()) {
3297 JavaThread* current_thread = (JavaThread*)thread;
3298
3299 #ifdef PROPER_TRANSITIONS
3300 // Not really unknown but ThreadInVMfromNative does more than we want
3301 ThreadInVMfromUnknown __tiv;
3302 {
3303 ThreadBlockInVM __tbivm(current_thread);
3304 r = rmonitor->raw_enter(current_thread);
3305 }
3306 #else
3307 /* Transition to thread_blocked without entering vm state */
3308 /* This is really evil. Normally you can't undo _thread_blocked */
3309 /* transitions like this because it would cause us to miss a */
3310 /* safepoint but since the thread was already in _thread_in_native */
3311 /* the thread is not leaving a safepoint safe state and it will */
3312 /* block when it tries to return from native. We can't safepoint */
3313 /* block in here because we could deadlock the vmthread. Blech. */
3314
3315 JavaThreadState state = current_thread->thread_state();
3316 assert(state == _thread_in_native, "Must be _thread_in_native");
3317 // frame should already be walkable since we are in native
3318 assert(!current_thread->has_last_Java_frame() ||
3319 current_thread->frame_anchor()->walkable(), "Must be walkable");
3320 current_thread->set_thread_state(_thread_blocked);
3321
3322 r = rmonitor->raw_enter(current_thread);
3323 // restore state, still at a safepoint safe state
3324 current_thread->set_thread_state(state);
3325
3326 #endif /* PROPER_TRANSITIONS */
3327 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3328 } else {
3329 if (thread->is_Named_thread()) {
3330 r = rmonitor->raw_enter(thread);
3331 } else {
3332 ShouldNotReachHere();
3333 }
3334 }
3335
3336 if (r != ObjectMonitor::OM_OK) { // robustness
3337 return JVMTI_ERROR_INTERNAL;
3338 }
3339 }
3340 return JVMTI_ERROR_NONE;
3341 } /* end RawMonitorEnter */
3342
3343
3344 // rmonitor - pre-checked for validity
3345 jvmtiError
3346 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3347 jvmtiError err = JVMTI_ERROR_NONE;
3348
3349 if (Threads::number_of_threads() == 0) {
3350 // No JavaThreads exist so just remove this monitor from the pending list.
3351 // Bool value from exit is false if rmonitor is not in the list.
3352 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3353 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3354 }
3355 } else {
3356 int r = 0;
3357 Thread* thread = Thread::current();
3358
3359 if (thread->is_Java_thread()) {
3360 JavaThread* current_thread = (JavaThread*)thread;
3361 #ifdef PROPER_TRANSITIONS
3362 // Not really unknown but ThreadInVMfromNative does more than we want
3363 ThreadInVMfromUnknown __tiv;
3364 #endif /* PROPER_TRANSITIONS */
3365 r = rmonitor->raw_exit(current_thread);
3366 } else {
3367 if (thread->is_Named_thread()) {
3368 r = rmonitor->raw_exit(thread);
3369 } else {
3370 ShouldNotReachHere();
3371 }
3372 }
3373
3374 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3375 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3376 } else {
3377 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3378 if (r != ObjectMonitor::OM_OK) { // robustness
3379 err = JVMTI_ERROR_INTERNAL;
3380 }
3381 }
3382 }
3383 return err;
3384 } /* end RawMonitorExit */
3385
3386
3387 // rmonitor - pre-checked for validity
3388 jvmtiError
3389 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3390 int r = 0;
3391 Thread* thread = Thread::current();
3392
3393 if (thread->is_Java_thread()) {
3394 JavaThread* current_thread = (JavaThread*)thread;
3395 #ifdef PROPER_TRANSITIONS
3396 // Not really unknown but ThreadInVMfromNative does more than we want
3397 ThreadInVMfromUnknown __tiv;
3398 {
3399 ThreadBlockInVM __tbivm(current_thread);
3400 r = rmonitor->raw_wait(millis, true, current_thread);
3401 }
3402 #else
3403 /* Transition to thread_blocked without entering vm state */
3404 /* This is really evil. Normally you can't undo _thread_blocked */
3405 /* transitions like this because it would cause us to miss a */
3406 /* safepoint but since the thread was already in _thread_in_native */
3407 /* the thread is not leaving a safepoint safe state and it will */
3408 /* block when it tries to return from native. We can't safepoint */
3409 /* block in here because we could deadlock the vmthread. Blech. */
3410
3411 JavaThreadState state = current_thread->thread_state();
3412 assert(state == _thread_in_native, "Must be _thread_in_native");
3413 // frame should already be walkable since we are in native
3414 assert(!current_thread->has_last_Java_frame() ||
3415 current_thread->frame_anchor()->walkable(), "Must be walkable");
3416 current_thread->set_thread_state(_thread_blocked);
3417
3418 r = rmonitor->raw_wait(millis, true, current_thread);
3419 // restore state, still at a safepoint safe state
3420 current_thread->set_thread_state(state);
3421
3422 #endif /* PROPER_TRANSITIONS */
3423 } else {
3424 if (thread->is_Named_thread()) {
3425 r = rmonitor->raw_wait(millis, true, thread);
3426 } else {
3427 ShouldNotReachHere();
3428 }
3429 }
3430
3431 switch (r) {
3432 case ObjectMonitor::OM_INTERRUPTED:
3433 return JVMTI_ERROR_INTERRUPT;
3434 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3435 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3436 }
3437 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3438 if (r != ObjectMonitor::OM_OK) { // robustness
3439 return JVMTI_ERROR_INTERNAL;
3440 }
3441
3442 return JVMTI_ERROR_NONE;
3443 } /* end RawMonitorWait */
3444
3445
3446 // rmonitor - pre-checked for validity
3447 jvmtiError
3448 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3449 int r = 0;
3450 Thread* thread = Thread::current();
3451
3452 if (thread->is_Java_thread()) {
3453 JavaThread* current_thread = (JavaThread*)thread;
3454 // Not really unknown but ThreadInVMfromNative does more than we want
3455 ThreadInVMfromUnknown __tiv;
3456 r = rmonitor->raw_notify(current_thread);
3457 } else {
3458 if (thread->is_Named_thread()) {
3459 r = rmonitor->raw_notify(thread);
3460 } else {
3461 ShouldNotReachHere();
3462 }
3463 }
3464
3465 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3466 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3467 }
3468 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3469 if (r != ObjectMonitor::OM_OK) { // robustness
3470 return JVMTI_ERROR_INTERNAL;
3471 }
3472
3473 return JVMTI_ERROR_NONE;
3474 } /* end RawMonitorNotify */
3475
3476
3477 // rmonitor - pre-checked for validity
3478 jvmtiError
3479 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3480 int r = 0;
3481 Thread* thread = Thread::current();
3482
3483 if (thread->is_Java_thread()) {
3484 JavaThread* current_thread = (JavaThread*)thread;
3485 ThreadInVMfromUnknown __tiv;
3486 r = rmonitor->raw_notifyAll(current_thread);
3487 } else {
3488 if (thread->is_Named_thread()) {
3489 r = rmonitor->raw_notifyAll(thread);
3490 } else {
3491 ShouldNotReachHere();
3492 }
3493 }
3494
3495 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3496 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3497 }
3498 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3499 if (r != ObjectMonitor::OM_OK) { // robustness
3500 return JVMTI_ERROR_INTERNAL;
3501 }
3502
3503 return JVMTI_ERROR_NONE;
3504 } /* end RawMonitorNotifyAll */
3505
3506
3507 //
3508 // JNI Function Interception functions
3509 //
3510
3511
3512 // function_table - pre-checked for NULL
3513 jvmtiError
3514 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3515 // Copy jni function table at safepoint.
3516 VM_JNIFunctionTableCopier copier(function_table);
3517 VMThread::execute(&copier);
3518
3519 return JVMTI_ERROR_NONE;
3520 } /* end SetJNIFunctionTable */
3521
3522
3523 // function_table - pre-checked for NULL
3524 jvmtiError
3525 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3526 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3527 if (*function_table == NULL)
3528 return JVMTI_ERROR_OUT_OF_MEMORY;
3529 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3530 return JVMTI_ERROR_NONE;
3531 } /* end GetJNIFunctionTable */
3532
3533
3534 //
3535 // Event Management functions
3536 //
3537
3538 jvmtiError
3539 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3540 // can only generate two event types
3541 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3542 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3543 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3544 }
3545
3546 // for compiled_method_load events we must check that the environment
3547 // has the can_generate_compiled_method_load_events capability.
3548 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3549 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3550 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3551 }
3552 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3553 } else {
3554 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3555 }
3556
3557 } /* end GenerateEvents */
3558
3559
3560 //
3561 // Extension Mechanism functions
3562 //
3563
3564 // extension_count_ptr - pre-checked for NULL
3565 // extensions - pre-checked for NULL
3566 jvmtiError
3567 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3568 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3569 } /* end GetExtensionFunctions */
3570
3571
3572 // extension_count_ptr - pre-checked for NULL
3573 // extensions - pre-checked for NULL
3574 jvmtiError
3575 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3576 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3577 } /* end GetExtensionEvents */
3578
3579
3580 // callback - NULL is a valid value, must be checked
3581 jvmtiError
3582 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3583 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3584 } /* end SetExtensionEventCallback */
3585
3586 //
3587 // Timers functions
3588 //
3589
3590 // info_ptr - pre-checked for NULL
3591 jvmtiError
3592 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3593 os::current_thread_cpu_time_info(info_ptr);
3594 return JVMTI_ERROR_NONE;
3595 } /* end GetCurrentThreadCpuTimerInfo */
3596
3597
3598 // nanos_ptr - pre-checked for NULL
3599 jvmtiError
3600 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3601 *nanos_ptr = os::current_thread_cpu_time();
3602 return JVMTI_ERROR_NONE;
3603 } /* end GetCurrentThreadCpuTime */
3604
3605
3606 // info_ptr - pre-checked for NULL
3607 jvmtiError
3608 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3609 os::thread_cpu_time_info(info_ptr);
3610 return JVMTI_ERROR_NONE;
3611 } /* end GetThreadCpuTimerInfo */
3612
3613
3614 // Threads_lock NOT held, java_thread not protected by lock
3615 // java_thread - pre-checked
3616 // nanos_ptr - pre-checked for NULL
3617 jvmtiError
3618 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3619 *nanos_ptr = os::thread_cpu_time(java_thread);
3620 return JVMTI_ERROR_NONE;
3621 } /* end GetThreadCpuTime */
3622
3623
3624 // info_ptr - pre-checked for NULL
3625 jvmtiError
3626 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3627 os::javaTimeNanos_info(info_ptr);
3628 return JVMTI_ERROR_NONE;
3629 } /* end GetTimerInfo */
3630
3631
3632 // nanos_ptr - pre-checked for NULL
3633 jvmtiError
3634 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3635 *nanos_ptr = os::javaTimeNanos();
3636 return JVMTI_ERROR_NONE;
3637 } /* end GetTime */
3638
3639
3640 // processor_count_ptr - pre-checked for NULL
3641 jvmtiError
3642 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3643 *processor_count_ptr = os::active_processor_count();
3644 return JVMTI_ERROR_NONE;
3645 } /* end GetAvailableProcessors */
3646
3647 jvmtiError
3648 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3649 if (sampling_interval < 0) {
3650 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3651 }
3652 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3653 return JVMTI_ERROR_NONE;
3654 } /* end SetHeapSamplingInterval */
3655
3656 //
3657 // System Properties functions
3658 //
3659
3660 // count_ptr - pre-checked for NULL
3661 // property_ptr - pre-checked for NULL
3662 jvmtiError
3663 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3664 jvmtiError err = JVMTI_ERROR_NONE;
3665
3666 // Get the number of readable properties.
3667 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3668
3669 // Allocate memory to hold the exact number of readable properties.
3670 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3671 if (err != JVMTI_ERROR_NONE) {
3672 return err;
3673 }
3674 int readable_count = 0;
3675 // Loop through the system properties until all the readable properties are found.
3676 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3677 if (p->is_readable()) {
3678 const char *key = p->key();
3679 char **tmp_value = *property_ptr+readable_count;
3680 readable_count++;
3681 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3682 if (err == JVMTI_ERROR_NONE) {
3683 strcpy(*tmp_value, key);
3684 } else {
3685 // clean up previously allocated memory.
3686 for (int j=0; j<readable_count; j++) {
3687 Deallocate((unsigned char*)*property_ptr+j);
3688 }
3689 Deallocate((unsigned char*)property_ptr);
3690 break;
3691 }
3692 }
3693 }
3694 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3695 return err;
3696 } /* end GetSystemProperties */
3697
3698
3699 // property - pre-checked for NULL
3700 // value_ptr - pre-checked for NULL
3701 jvmtiError
3702 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3703 jvmtiError err = JVMTI_ERROR_NONE;
3704 const char *value;
3705
3706 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3707 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3708 if (value == NULL) {
3709 err = JVMTI_ERROR_NOT_AVAILABLE;
3710 } else {
3711 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3712 if (err == JVMTI_ERROR_NONE) {
3713 strcpy(*value_ptr, value);
3714 }
3715 }
3716 return err;
3717 } /* end GetSystemProperty */
3718
3719
3720 // property - pre-checked for NULL
3721 // value - NULL is a valid value, must be checked
3722 jvmtiError
3723 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3724 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3725
3726 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3727 if (strcmp(property, p->key()) == 0) {
3728 if (p->set_writeable_value(value_ptr)) {
3729 err = JVMTI_ERROR_NONE;
3730 }
3731 }
3732 }
3733 return err;
3734 } /* end SetSystemProperty */