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