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