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