1 /*
2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/modules.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "interpreter/bytecodeStream.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvmtifiles/jvmtiEnv.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jniCheck.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "prims/jvmtiAgentThread.hpp"
45 #include "prims/jvmtiClassFileReconstituter.hpp"
46 #include "prims/jvmtiCodeBlobEvents.hpp"
47 #include "prims/jvmtiExtensions.hpp"
48 #include "prims/jvmtiGetLoadedClasses.hpp"
49 #include "prims/jvmtiImpl.hpp"
50 #include "prims/jvmtiManageCapabilities.hpp"
51 #include "prims/jvmtiRawMonitor.hpp"
52 #include "prims/jvmtiRedefineClasses.hpp"
53 #include "prims/jvmtiTagMap.hpp"
54 #include "prims/jvmtiThreadState.inline.hpp"
55 #include "prims/jvmtiUtil.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/fieldDescriptor.inline.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/interfaceSupport.inline.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/jfieldIDWorkaround.hpp"
63 #include "runtime/jniHandles.inline.hpp"
64 #include "runtime/objectMonitor.inline.hpp"
65 #include "runtime/osThread.hpp"
66 #include "runtime/reflectionUtils.hpp"
67 #include "runtime/signature.hpp"
68 #include "runtime/thread.inline.hpp"
69 #include "runtime/threadHeapSampler.hpp"
70 #include "runtime/threadSMR.hpp"
71 #include "runtime/timerTrace.hpp"
72 #include "runtime/vframe.inline.hpp"
73 #include "runtime/vmThread.hpp"
74 #include "services/threadService.hpp"
75 #include "utilities/exceptions.hpp"
76 #include "utilities/preserveException.hpp"
77 #include "utilities/utf8.hpp"
78
79
80 #define FIXLATER 0 // REMOVE this when completed.
81
82 // FIXLATER: hook into JvmtiTrace
83 #define TraceJVMTICalls false
84
85 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
86 }
87
88 JvmtiEnv::~JvmtiEnv() {
89 }
90
91 JvmtiEnv*
92 JvmtiEnv::create_a_jvmti(jint version) {
93 return new JvmtiEnv(version);
94 }
95
96 // VM operation class to copy jni function table at safepoint.
97 // More than one java threads or jvmti agents may be reading/
98 // modifying jni function tables. To reduce the risk of bad
99 // interaction b/w these threads it is copied at safepoint.
100 class VM_JNIFunctionTableCopier : public VM_Operation {
101 private:
102 const struct JNINativeInterface_ *_function_table;
103 public:
104 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
105 _function_table = func_tbl;
106 };
107
108 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
109 void doit() {
110 copy_jni_function_table(_function_table);
111 };
112 };
113
114 //
115 // Do not change the "prefix" marker below, everything above it is copied
116 // unchanged into the filled stub, everything below is controlled by the
117 // stub filler (only method bodies are carried forward, and then only for
118 // functionality still in the spec).
119 //
120 // end file prefix
121
122 //
123 // Memory Management functions
124 //
125
126 // mem_ptr - pre-checked for NULL
127 jvmtiError
128 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
129 return allocate(size, mem_ptr);
130 } /* end Allocate */
131
132
133 // mem - NULL is a valid value, must be checked
134 jvmtiError
135 JvmtiEnv::Deallocate(unsigned char* mem) {
136 return deallocate(mem);
137 } /* end Deallocate */
138
139 // Threads_lock NOT held, java_thread not protected by lock
140 // java_thread - pre-checked
141 // data - NULL is a valid value, must be checked
142 jvmtiError
143 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
144 JvmtiThreadState* state = java_thread->jvmti_thread_state();
145 if (state == NULL) {
146 if (data == NULL) {
147 // leaving state unset same as data set to NULL
148 return JVMTI_ERROR_NONE;
149 }
150 // otherwise, create the state
151 state = JvmtiThreadState::state_for(java_thread);
152 if (state == NULL) {
153 return JVMTI_ERROR_THREAD_NOT_ALIVE;
154 }
155 }
156 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
157 return JVMTI_ERROR_NONE;
158 } /* end SetThreadLocalStorage */
159
160
161 // Threads_lock NOT held
162 // thread - NOT pre-checked
163 // data_ptr - pre-checked for NULL
164 jvmtiError
165 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
166 JavaThread* current_thread = JavaThread::current();
167 if (thread == NULL) {
168 JvmtiThreadState* state = current_thread->jvmti_thread_state();
169 *data_ptr = (state == NULL) ? NULL :
170 state->env_thread_state(this)->get_agent_thread_local_storage_data();
171 } else {
172 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
173 // the thread to _thread_in_vm. However, when the TLS for a thread
174 // other than the current thread is required we need to transition
175 // from native so as to resolve the jthread.
176
177 ThreadInVMfromNative __tiv(current_thread);
178 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
179 debug_only(VMNativeEntryWrapper __vew;)
180
181 JavaThread* java_thread = NULL;
182 ThreadsListHandle tlh(current_thread);
183 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
184 if (err != JVMTI_ERROR_NONE) {
185 return err;
186 }
187
188 JvmtiThreadState* state = java_thread->jvmti_thread_state();
189 *data_ptr = (state == NULL) ? NULL :
190 state->env_thread_state(this)->get_agent_thread_local_storage_data();
191 }
192 return JVMTI_ERROR_NONE;
193 } /* end GetThreadLocalStorage */
194
195 //
196 // Module functions
197 //
198
199 // module_count_ptr - pre-checked for NULL
200 // modules_ptr - pre-checked for NULL
201 jvmtiError
202 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
203 JvmtiModuleClosure jmc;
204
205 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
206 } /* end GetAllModules */
207
208
209 // class_loader - NULL is a valid value, must be pre-checked
210 // package_name - pre-checked for NULL
211 // module_ptr - pre-checked for NULL
212 jvmtiError
213 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
214 JavaThread* THREAD = JavaThread::current(); // pass to macros
215 ResourceMark rm(THREAD);
216
217 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
218 // Check that loader is a subclass of java.lang.ClassLoader.
219 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
220 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
221 }
222 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
223 if (HAS_PENDING_EXCEPTION) {
224 CLEAR_PENDING_EXCEPTION;
225 return JVMTI_ERROR_INTERNAL; // unexpected exception
226 }
227 *module_ptr = module;
228 return JVMTI_ERROR_NONE;
229 } /* end GetNamedModule */
230
231
232 // module - pre-checked for NULL
233 // to_module - pre-checked for NULL
234 jvmtiError
235 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
236 JavaThread* THREAD = JavaThread::current();
237
238 // check module
239 Handle h_module(THREAD, JNIHandles::resolve(module));
240 if (!java_lang_Module::is_instance(h_module())) {
241 return JVMTI_ERROR_INVALID_MODULE;
242 }
243 // check to_module
244 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
245 if (!java_lang_Module::is_instance(h_to_module())) {
246 return JVMTI_ERROR_INVALID_MODULE;
247 }
248 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
249 } /* end AddModuleReads */
250
251
252 // module - pre-checked for NULL
253 // pkg_name - pre-checked for NULL
254 // to_module - pre-checked for NULL
255 jvmtiError
256 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
257 JavaThread* THREAD = JavaThread::current();
258 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
259
260 // check module
261 Handle h_module(THREAD, JNIHandles::resolve(module));
262 if (!java_lang_Module::is_instance(h_module())) {
263 return JVMTI_ERROR_INVALID_MODULE;
264 }
265 // check to_module
266 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
267 if (!java_lang_Module::is_instance(h_to_module())) {
268 return JVMTI_ERROR_INVALID_MODULE;
269 }
270 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
271 } /* end AddModuleExports */
272
273
274 // module - pre-checked for NULL
275 // pkg_name - pre-checked for NULL
276 // to_module - pre-checked for NULL
277 jvmtiError
278 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
279 JavaThread* THREAD = JavaThread::current();
280 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
281
282 // check module
283 Handle h_module(THREAD, JNIHandles::resolve(module));
284 if (!java_lang_Module::is_instance(h_module())) {
285 return JVMTI_ERROR_INVALID_MODULE;
286 }
287 // check to_module
288 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
289 if (!java_lang_Module::is_instance(h_to_module())) {
290 return JVMTI_ERROR_INVALID_MODULE;
291 }
292 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
293 } /* end AddModuleOpens */
294
295
296 // module - pre-checked for NULL
297 // service - pre-checked for NULL
298 jvmtiError
299 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
300 JavaThread* THREAD = JavaThread::current();
301
302 // check module
303 Handle h_module(THREAD, JNIHandles::resolve(module));
304 if (!java_lang_Module::is_instance(h_module())) {
305 return JVMTI_ERROR_INVALID_MODULE;
306 }
307 // check service
308 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
309 if (!java_lang_Class::is_instance(h_service()) ||
310 java_lang_Class::is_primitive(h_service())) {
311 return JVMTI_ERROR_INVALID_CLASS;
312 }
313 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
314 } /* end AddModuleUses */
315
316
317 // module - pre-checked for NULL
318 // service - pre-checked for NULL
319 // impl_class - pre-checked for NULL
320 jvmtiError
321 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
322 JavaThread* THREAD = JavaThread::current();
323
324 // check module
325 Handle h_module(THREAD, JNIHandles::resolve(module));
326 if (!java_lang_Module::is_instance(h_module())) {
327 return JVMTI_ERROR_INVALID_MODULE;
328 }
329 // check service
330 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
331 if (!java_lang_Class::is_instance(h_service()) ||
332 java_lang_Class::is_primitive(h_service())) {
333 return JVMTI_ERROR_INVALID_CLASS;
334 }
335 // check impl_class
336 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
337 if (!java_lang_Class::is_instance(h_impl_class()) ||
338 java_lang_Class::is_primitive(h_impl_class())) {
339 return JVMTI_ERROR_INVALID_CLASS;
340 }
341 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
342 } /* end AddModuleProvides */
343
344 // module - pre-checked for NULL
345 // is_modifiable_class_ptr - pre-checked for NULL
346 jvmtiError
347 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
348 JavaThread* THREAD = JavaThread::current();
349
350 // check module
351 Handle h_module(THREAD, JNIHandles::resolve(module));
352 if (!java_lang_Module::is_instance(h_module())) {
353 return JVMTI_ERROR_INVALID_MODULE;
354 }
355
356 *is_modifiable_module_ptr = JNI_TRUE;
357 return JVMTI_ERROR_NONE;
358 } /* end IsModifiableModule */
359
360
361 //
362 // Class functions
363 //
364
365 // class_count_ptr - pre-checked for NULL
366 // classes_ptr - pre-checked for NULL
367 jvmtiError
368 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
369 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
370 } /* end GetLoadedClasses */
371
372
373 // initiating_loader - NULL is a valid value, must be checked
374 // class_count_ptr - pre-checked for NULL
375 // classes_ptr - pre-checked for NULL
376 jvmtiError
377 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
378 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
379 class_count_ptr, classes_ptr);
380 } /* end GetClassLoaderClasses */
381
382 // k_mirror - may be primitive, this must be checked
383 // is_modifiable_class_ptr - pre-checked for NULL
384 jvmtiError
385 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
386 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
387 JNI_TRUE : JNI_FALSE;
388 return JVMTI_ERROR_NONE;
389 } /* end IsModifiableClass */
390
391 // class_count - pre-checked to be greater than or equal to 0
392 // classes - pre-checked for NULL
393 jvmtiError
394 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
395 //TODO: add locking
396
397 int index;
398 JavaThread* current_thread = JavaThread::current();
399 ResourceMark rm(current_thread);
400
401 jvmtiClassDefinition* class_definitions =
402 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
403 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
404
405 for (index = 0; index < class_count; index++) {
406 HandleMark hm(current_thread);
407
408 jclass jcls = classes[index];
409 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
410 if (k_mirror == NULL) {
411 return JVMTI_ERROR_INVALID_CLASS;
412 }
413 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
414 return JVMTI_ERROR_INVALID_CLASS;
415 }
416
417 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
418 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
419 }
420
421 Klass* klass = java_lang_Class::as_Klass(k_mirror);
422
423 jint status = klass->jvmti_class_status();
424 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
425 return JVMTI_ERROR_INVALID_CLASS;
426 }
427
428 InstanceKlass* ik = InstanceKlass::cast(klass);
429 if (ik->get_cached_class_file_bytes() == NULL) {
430 // Not cached, we need to reconstitute the class file from the
431 // VM representation. We don't attach the reconstituted class
432 // bytes to the InstanceKlass here because they have not been
433 // validated and we're not at a safepoint.
434 JvmtiClassFileReconstituter reconstituter(ik);
435 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
436 return reconstituter.get_error();
437 }
438
439 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
440 class_definitions[index].class_bytes = (unsigned char*)
441 reconstituter.class_file_bytes();
442 } else {
443 // it is cached, get it from the cache
444 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
445 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
446 }
447 class_definitions[index].klass = jcls;
448 }
449 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
450 VMThread::execute(&op);
451 return (op.check_error());
452 } /* end RetransformClasses */
453
454
455 // class_count - pre-checked to be greater than or equal to 0
456 // class_definitions - pre-checked for NULL
457 jvmtiError
458 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
459 //TODO: add locking
460 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
461 VMThread::execute(&op);
462 return (op.check_error());
463 } /* end RedefineClasses */
464
465
466 //
467 // Object functions
468 //
469
470 // size_ptr - pre-checked for NULL
471 jvmtiError
472 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
473 oop mirror = JNIHandles::resolve_external_guard(object);
474 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
475 *size_ptr = (jlong)Universe::heap()->obj_size(mirror) * wordSize;
476 return JVMTI_ERROR_NONE;
477 } /* end GetObjectSize */
478
479 //
480 // Method functions
481 //
482
483 // prefix - NULL is a valid value, must be checked
484 jvmtiError
485 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
486 return prefix == NULL?
487 SetNativeMethodPrefixes(0, NULL) :
488 SetNativeMethodPrefixes(1, (char**)&prefix);
489 } /* end SetNativeMethodPrefix */
490
491
492 // prefix_count - pre-checked to be greater than or equal to 0
493 // prefixes - pre-checked for NULL
494 jvmtiError
495 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
496 // Have to grab JVMTI thread state lock to be sure that some thread
497 // isn't accessing the prefixes at the same time we are setting them.
498 // No locks during VM bring-up.
499 if (Threads::number_of_threads() == 0) {
500 return set_native_method_prefixes(prefix_count, prefixes);
501 } else {
502 MutexLocker mu(JvmtiThreadState_lock);
503 return set_native_method_prefixes(prefix_count, prefixes);
504 }
505 } /* end SetNativeMethodPrefixes */
506
507 //
508 // Event Management functions
509 //
510
511 // callbacks - NULL is a valid value, must be checked
512 // size_of_callbacks - pre-checked to be greater than or equal to 0
513 jvmtiError
514 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
515 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
516 return JVMTI_ERROR_NONE;
517 } /* end SetEventCallbacks */
518
519
520 // event_thread - NULL is a valid value, must be checked
521 jvmtiError
522 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
523 if (event_thread == NULL) {
524 // Can be called at Agent_OnLoad() time with event_thread == NULL
525 // when Thread::current() does not work yet so we cannot create a
526 // ThreadsListHandle that is common to both thread-specific and
527 // global code paths.
528
529 // event_type must be valid
530 if (!JvmtiEventController::is_valid_event_type(event_type)) {
531 return JVMTI_ERROR_INVALID_EVENT_TYPE;
532 }
533
534 bool enabled = (mode == JVMTI_ENABLE);
535
536 // assure that needed capabilities are present
537 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
538 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
539 }
540
541 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
542 record_class_file_load_hook_enabled();
543 }
544
545 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
546 } else {
547 // We have a specified event_thread.
548 JavaThread* java_thread = NULL;
549 ThreadsListHandle tlh;
550 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
551 if (err != JVMTI_ERROR_NONE) {
552 return err;
553 }
554
555 // event_type must be valid
556 if (!JvmtiEventController::is_valid_event_type(event_type)) {
557 return JVMTI_ERROR_INVALID_EVENT_TYPE;
558 }
559
560 // global events cannot be controlled at thread level.
561 if (JvmtiEventController::is_global_event(event_type)) {
562 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
563 }
564
565 bool enabled = (mode == JVMTI_ENABLE);
566
567 // assure that needed capabilities are present
568 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
569 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
570 }
571
572 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
573 record_class_file_load_hook_enabled();
574 }
575 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
576 }
577
578 return JVMTI_ERROR_NONE;
579 } /* end SetEventNotificationMode */
580
581 //
582 // Capability functions
583 //
584
585 // capabilities_ptr - pre-checked for NULL
586 jvmtiError
587 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
588 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
589 get_prohibited_capabilities(),
590 capabilities_ptr);
591 return JVMTI_ERROR_NONE;
592 } /* end GetPotentialCapabilities */
593
594
595 // capabilities_ptr - pre-checked for NULL
596 jvmtiError
597 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
598 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
599 get_prohibited_capabilities(),
600 capabilities_ptr,
601 get_capabilities());
602 } /* end AddCapabilities */
603
604
605 // capabilities_ptr - pre-checked for NULL
606 jvmtiError
607 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
608 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
609 return JVMTI_ERROR_NONE;
610 } /* end RelinquishCapabilities */
611
612
613 // capabilities_ptr - pre-checked for NULL
614 jvmtiError
615 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
616 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
617 return JVMTI_ERROR_NONE;
618 } /* end GetCapabilities */
619
620 //
621 // Class Loader Search functions
622 //
623
624 // segment - pre-checked for NULL
625 jvmtiError
626 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
627 jvmtiPhase phase = get_phase();
628 if (phase == JVMTI_PHASE_ONLOAD) {
629 Arguments::append_sysclasspath(segment);
630 return JVMTI_ERROR_NONE;
631 } else if (use_version_1_0_semantics()) {
632 // This JvmtiEnv requested version 1.0 semantics and this function
633 // is only allowed in the ONLOAD phase in version 1.0 so we need to
634 // return an error here.
635 return JVMTI_ERROR_WRONG_PHASE;
636 } else if (phase == JVMTI_PHASE_LIVE) {
637 // The phase is checked by the wrapper that called this function,
638 // but this thread could be racing with the thread that is
639 // terminating the VM so we check one more time.
640
641 // create the zip entry
642 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
643 if (zip_entry == NULL) {
644 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
645 }
646
647 // lock the loader
648 Thread* thread = Thread::current();
649 HandleMark hm;
650 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
651
652 ObjectLocker ol(loader_lock, thread);
653
654 // add the jar file to the bootclasspath
655 log_info(class, load)("opened: %s", zip_entry->name());
656 #if INCLUDE_CDS
657 ClassLoaderExt::append_boot_classpath(zip_entry);
658 #else
659 ClassLoader::add_to_boot_append_entries(zip_entry);
660 #endif
661 return JVMTI_ERROR_NONE;
662 } else {
663 return JVMTI_ERROR_WRONG_PHASE;
664 }
665
666 } /* end AddToBootstrapClassLoaderSearch */
667
668
669 // segment - pre-checked for NULL
670 jvmtiError
671 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
672 jvmtiPhase phase = get_phase();
673
674 if (phase == JVMTI_PHASE_ONLOAD) {
675 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
676 if (strcmp("java.class.path", p->key()) == 0) {
677 p->append_value(segment);
678 break;
679 }
680 }
681 return JVMTI_ERROR_NONE;
682 } else if (phase == JVMTI_PHASE_LIVE) {
683 // The phase is checked by the wrapper that called this function,
684 // but this thread could be racing with the thread that is
685 // terminating the VM so we check one more time.
686 HandleMark hm;
687
688 // create the zip entry (which will open the zip file and hence
689 // check that the segment is indeed a zip file).
690 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
691 if (zip_entry == NULL) {
692 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
693 }
694 delete zip_entry; // no longer needed
695
696 // lock the loader
697 Thread* THREAD = Thread::current();
698 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
699
700 ObjectLocker ol(loader, THREAD);
701
702 // need the path as java.lang.String
703 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
704 if (HAS_PENDING_EXCEPTION) {
705 CLEAR_PENDING_EXCEPTION;
706 return JVMTI_ERROR_INTERNAL;
707 }
708
709 // Invoke the appendToClassPathForInstrumentation method - if the method
710 // is not found it means the loader doesn't support adding to the class path
711 // in the live phase.
712 {
713 JavaValue res(T_VOID);
714 JavaCalls::call_special(&res,
715 loader,
716 loader->klass(),
717 vmSymbols::appendToClassPathForInstrumentation_name(),
718 vmSymbols::appendToClassPathForInstrumentation_signature(),
719 path,
720 THREAD);
721 if (HAS_PENDING_EXCEPTION) {
722 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
723 CLEAR_PENDING_EXCEPTION;
724
725 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
726 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
727 } else {
728 return JVMTI_ERROR_INTERNAL;
729 }
730 }
731 }
732
733 return JVMTI_ERROR_NONE;
734 } else {
735 return JVMTI_ERROR_WRONG_PHASE;
736 }
737 } /* end AddToSystemClassLoaderSearch */
738
739 //
740 // General functions
741 //
742
743 // phase_ptr - pre-checked for NULL
744 jvmtiError
745 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
746 *phase_ptr = phase();
747 return JVMTI_ERROR_NONE;
748 } /* end GetPhase */
749
750
751 jvmtiError
752 JvmtiEnv::DisposeEnvironment() {
753 dispose();
754 return JVMTI_ERROR_NONE;
755 } /* end DisposeEnvironment */
756
757
758 // data - NULL is a valid value, must be checked
759 jvmtiError
760 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
761 set_env_local_storage(data);
762 return JVMTI_ERROR_NONE;
763 } /* end SetEnvironmentLocalStorage */
764
765
766 // data_ptr - pre-checked for NULL
767 jvmtiError
768 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
769 *data_ptr = (void*)get_env_local_storage();
770 return JVMTI_ERROR_NONE;
771 } /* end GetEnvironmentLocalStorage */
772
773 // version_ptr - pre-checked for NULL
774 jvmtiError
775 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
776 *version_ptr = JVMTI_VERSION;
777 return JVMTI_ERROR_NONE;
778 } /* end GetVersionNumber */
779
780
781 // name_ptr - pre-checked for NULL
782 jvmtiError
783 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
784 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
785 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
786 }
787 const char *name = JvmtiUtil::error_name(error);
788 if (name == NULL) {
789 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
790 }
791 size_t len = strlen(name) + 1;
792 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
793 if (err == JVMTI_ERROR_NONE) {
794 memcpy(*name_ptr, name, len);
795 }
796 return err;
797 } /* end GetErrorName */
798
799
800 jvmtiError
801 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
802 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
803 switch (flag) {
804 case JVMTI_VERBOSE_OTHER:
805 // ignore
806 break;
807 case JVMTI_VERBOSE_CLASS:
808 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
809 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
810 break;
811 case JVMTI_VERBOSE_GC:
812 if (value == 0) {
813 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
814 } else {
815 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
816 }
817 break;
818 case JVMTI_VERBOSE_JNI:
819 PrintJNIResolving = value != 0;
820 break;
821 default:
822 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
823 };
824 return JVMTI_ERROR_NONE;
825 } /* end SetVerboseFlag */
826
827
828 // format_ptr - pre-checked for NULL
829 jvmtiError
830 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
831 *format_ptr = JVMTI_JLOCATION_JVMBCI;
832 return JVMTI_ERROR_NONE;
833 } /* end GetJLocationFormat */
834
835 //
836 // Thread functions
837 //
838
839 // Threads_lock NOT held
840 // thread - NOT pre-checked
841 // thread_state_ptr - pre-checked for NULL
842 jvmtiError
843 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
844 JavaThread* current_thread = JavaThread::current();
845 JavaThread* java_thread = NULL;
846 oop thread_oop = NULL;
847 ThreadsListHandle tlh(current_thread);
848
849 if (thread == NULL) {
850 java_thread = current_thread;
851 thread_oop = java_thread->threadObj();
852
853 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
854 return JVMTI_ERROR_INVALID_THREAD;
855 }
856 } else {
857 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
858 if (err != JVMTI_ERROR_NONE) {
859 // We got an error code so we don't have a JavaThread *, but
860 // only return an error from here if we didn't get a valid
861 // thread_oop.
862 if (thread_oop == NULL) {
863 return err;
864 }
865 // We have a valid thread_oop so we can return some thread state.
866 }
867 }
868
869 // get most state bits
870 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
871
872 if (java_thread != NULL) {
873 // We have a JavaThread* so add more state bits.
874 JavaThreadState jts = java_thread->thread_state();
875
876 if (java_thread->is_being_ext_suspended()) {
877 state |= JVMTI_THREAD_STATE_SUSPENDED;
878 }
879 if (jts == _thread_in_native) {
880 state |= JVMTI_THREAD_STATE_IN_NATIVE;
881 }
882 if (java_thread->is_interrupted(false)) {
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 MutexLocker 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 MutexLocker 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 JavaThread* current_thread = JavaThread::current();
1095 JavaThread* java_thread = NULL;
1096 ThreadsListHandle tlh(current_thread);
1097 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1098 if (err != JVMTI_ERROR_NONE) {
1099 return err;
1100 }
1101 // Really this should be a Java call to Thread.interrupt to ensure the same
1102 // semantics, however historically this has not been done for some reason.
1103 // So we continue with that (which means we don't interact with any Java-level
1104 // Interruptible object) but we must set the Java-level interrupted state.
1105 java_lang_Thread::set_interrupted(JNIHandles::resolve(thread), true);
1106 java_thread->interrupt();
1107
1108 return JVMTI_ERROR_NONE;
1109 } /* end InterruptThread */
1110
1111
1112 // Threads_lock NOT held
1113 // thread - NOT pre-checked
1114 // info_ptr - pre-checked for NULL
1115 jvmtiError
1116 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1117 ResourceMark rm;
1118 HandleMark hm;
1119
1120 JavaThread* current_thread = JavaThread::current();
1121 ThreadsListHandle tlh(current_thread);
1122
1123 // if thread is NULL the current thread is used
1124 oop thread_oop = NULL;
1125 if (thread == NULL) {
1126 thread_oop = current_thread->threadObj();
1127 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1128 return JVMTI_ERROR_INVALID_THREAD;
1129 }
1130 } else {
1131 JavaThread* java_thread = NULL;
1132 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1133 if (err != JVMTI_ERROR_NONE) {
1134 // We got an error code so we don't have a JavaThread *, but
1135 // only return an error from here if we didn't get a valid
1136 // thread_oop.
1137 if (thread_oop == NULL) {
1138 return err;
1139 }
1140 // We have a valid thread_oop so we can return some thread info.
1141 }
1142 }
1143
1144 Handle thread_obj(current_thread, thread_oop);
1145 Handle name;
1146 ThreadPriority priority;
1147 Handle thread_group;
1148 Handle context_class_loader;
1149 bool is_daemon;
1150
1151 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1152 priority = java_lang_Thread::priority(thread_obj());
1153 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1154 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1155
1156 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1157 context_class_loader = Handle(current_thread, loader);
1158
1159 { const char *n;
1160
1161 if (name() != NULL) {
1162 n = java_lang_String::as_utf8_string(name());
1163 } else {
1164 int utf8_length = 0;
1165 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1166 }
1167
1168 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1169 if (info_ptr->name == NULL)
1170 return JVMTI_ERROR_OUT_OF_MEMORY;
1171
1172 strcpy(info_ptr->name, n);
1173 }
1174 info_ptr->is_daemon = is_daemon;
1175 info_ptr->priority = priority;
1176
1177 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1178 jni_reference(context_class_loader);
1179 info_ptr->thread_group = jni_reference(thread_group);
1180
1181 return JVMTI_ERROR_NONE;
1182 } /* end GetThreadInfo */
1183
1184
1185 // Threads_lock NOT held, java_thread not protected by lock
1186 // java_thread - pre-checked
1187 // owned_monitor_count_ptr - pre-checked for NULL
1188 // owned_monitors_ptr - pre-checked for NULL
1189 jvmtiError
1190 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1191 jvmtiError err = JVMTI_ERROR_NONE;
1192 JavaThread* calling_thread = JavaThread::current();
1193
1194 // growable array of jvmti monitors info on the C-heap
1195 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1196 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1197
1198 // It is only safe to perform the direct operation on the current
1199 // thread. All other usage needs to use a vm-safepoint-op for safety.
1200 if (java_thread == calling_thread) {
1201 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1202 } else {
1203 // JVMTI get monitors info at safepoint. Do not require target thread to
1204 // be suspended.
1205 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1206 VMThread::execute(&op);
1207 err = op.result();
1208 }
1209 jint owned_monitor_count = owned_monitors_list->length();
1210 if (err == JVMTI_ERROR_NONE) {
1211 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1212 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1213 // copy into the returned array
1214 for (int i = 0; i < owned_monitor_count; i++) {
1215 (*owned_monitors_ptr)[i] =
1216 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1217 }
1218 *owned_monitor_count_ptr = owned_monitor_count;
1219 }
1220 }
1221 // clean up.
1222 for (int i = 0; i < owned_monitor_count; i++) {
1223 deallocate((unsigned char*)owned_monitors_list->at(i));
1224 }
1225 delete owned_monitors_list;
1226
1227 return err;
1228 } /* end GetOwnedMonitorInfo */
1229
1230
1231 // Threads_lock NOT held, java_thread not protected by lock
1232 // java_thread - pre-checked
1233 // monitor_info_count_ptr - pre-checked for NULL
1234 // monitor_info_ptr - pre-checked for NULL
1235 jvmtiError
1236 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1237 jvmtiError err = JVMTI_ERROR_NONE;
1238 JavaThread* calling_thread = JavaThread::current();
1239
1240 // growable array of jvmti monitors info on the C-heap
1241 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1242 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1243
1244 // It is only safe to perform the direct operation on the current
1245 // thread. All other usage needs to use a vm-safepoint-op for safety.
1246 if (java_thread == calling_thread) {
1247 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1248 } else {
1249 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1250 // be suspended.
1251 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1252 VMThread::execute(&op);
1253 err = op.result();
1254 }
1255
1256 jint owned_monitor_count = owned_monitors_list->length();
1257 if (err == JVMTI_ERROR_NONE) {
1258 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1259 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1260 // copy to output array.
1261 for (int i = 0; i < owned_monitor_count; i++) {
1262 (*monitor_info_ptr)[i].monitor =
1263 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1264 (*monitor_info_ptr)[i].stack_depth =
1265 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1266 }
1267 }
1268 *monitor_info_count_ptr = owned_monitor_count;
1269 }
1270
1271 // clean up.
1272 for (int i = 0; i < owned_monitor_count; i++) {
1273 deallocate((unsigned char*)owned_monitors_list->at(i));
1274 }
1275 delete owned_monitors_list;
1276
1277 return err;
1278 } /* end GetOwnedMonitorStackDepthInfo */
1279
1280
1281 // Threads_lock NOT held, java_thread not protected by lock
1282 // java_thread - pre-checked
1283 // monitor_ptr - pre-checked for NULL
1284 jvmtiError
1285 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1286 jvmtiError err = JVMTI_ERROR_NONE;
1287 JavaThread* calling_thread = JavaThread::current();
1288
1289 // It is only safe to perform the direct operation on the current
1290 // thread. All other usage needs to use a vm-safepoint-op for safety.
1291 if (java_thread == calling_thread) {
1292 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1293 } else {
1294 // get contended monitor information at safepoint.
1295 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1296 VMThread::execute(&op);
1297 err = op.result();
1298 }
1299 return err;
1300 } /* end GetCurrentContendedMonitor */
1301
1302
1303 // Threads_lock NOT held
1304 // thread - NOT pre-checked
1305 // proc - pre-checked for NULL
1306 // arg - NULL is a valid value, must be checked
1307 jvmtiError
1308 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1309 JavaThread* current_thread = JavaThread::current();
1310
1311 JavaThread* java_thread = NULL;
1312 oop thread_oop = NULL;
1313 ThreadsListHandle tlh(current_thread);
1314 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1315 if (err != JVMTI_ERROR_NONE) {
1316 // We got an error code so we don't have a JavaThread *, but
1317 // only return an error from here if we didn't get a valid
1318 // thread_oop.
1319 if (thread_oop == NULL) {
1320 return err;
1321 }
1322 // We have a valid thread_oop.
1323 }
1324
1325 if (java_thread != NULL) {
1326 // 'thread' refers to an existing JavaThread.
1327 return JVMTI_ERROR_INVALID_THREAD;
1328 }
1329
1330 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1331 return JVMTI_ERROR_INVALID_PRIORITY;
1332 }
1333
1334 Handle thread_hndl(current_thread, thread_oop);
1335 {
1336 MutexLocker mu(Threads_lock); // grab Threads_lock
1337
1338 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1339
1340 // At this point it may be possible that no osthread was created for the
1341 // JavaThread due to lack of memory.
1342 if (new_thread == NULL || new_thread->osthread() == NULL) {
1343 if (new_thread != NULL) {
1344 new_thread->smr_delete();
1345 }
1346 return JVMTI_ERROR_OUT_OF_MEMORY;
1347 }
1348
1349 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1350 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1351 java_lang_Thread::set_daemon(thread_hndl());
1352
1353 new_thread->set_threadObj(thread_hndl());
1354 Threads::add(new_thread);
1355 Thread::start(new_thread);
1356 } // unlock Threads_lock
1357
1358 return JVMTI_ERROR_NONE;
1359 } /* end RunAgentThread */
1360
1361 //
1362 // Thread Group functions
1363 //
1364
1365 // group_count_ptr - pre-checked for NULL
1366 // groups_ptr - pre-checked for NULL
1367 jvmtiError
1368 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1369 JavaThread* current_thread = JavaThread::current();
1370
1371 // Only one top level thread group now.
1372 *group_count_ptr = 1;
1373
1374 // Allocate memory to store global-refs to the thread groups.
1375 // Assume this area is freed by caller.
1376 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1377
1378 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1379
1380 // Convert oop to Handle, then convert Handle to global-ref.
1381 {
1382 HandleMark hm(current_thread);
1383 Handle system_thread_group(current_thread, Universe::system_thread_group());
1384 *groups_ptr[0] = jni_reference(system_thread_group);
1385 }
1386
1387 return JVMTI_ERROR_NONE;
1388 } /* end GetTopThreadGroups */
1389
1390
1391 // info_ptr - pre-checked for NULL
1392 jvmtiError
1393 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1394 ResourceMark rm;
1395 HandleMark hm;
1396
1397 JavaThread* current_thread = JavaThread::current();
1398
1399 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1400 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1401
1402 const char* name;
1403 Handle parent_group;
1404 bool is_daemon;
1405 ThreadPriority max_priority;
1406
1407 name = java_lang_ThreadGroup::name(group_obj());
1408 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1409 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1410 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1411
1412 info_ptr->is_daemon = is_daemon;
1413 info_ptr->max_priority = max_priority;
1414 info_ptr->parent = jni_reference(parent_group);
1415
1416 if (name != NULL) {
1417 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1418 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1419 strcpy(info_ptr->name, name);
1420 } else {
1421 info_ptr->name = NULL;
1422 }
1423
1424 return JVMTI_ERROR_NONE;
1425 } /* end GetThreadGroupInfo */
1426
1427
1428 // thread_count_ptr - pre-checked for NULL
1429 // threads_ptr - pre-checked for NULL
1430 // group_count_ptr - pre-checked for NULL
1431 // groups_ptr - pre-checked for NULL
1432 jvmtiError
1433 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1434 JavaThread* current_thread = JavaThread::current();
1435 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1436 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1437
1438 Handle *thread_objs = NULL;
1439 Handle *group_objs = NULL;
1440 int nthreads = 0;
1441 int ngroups = 0;
1442 int hidden_threads = 0;
1443
1444 ResourceMark rm(current_thread);
1445 HandleMark hm(current_thread);
1446
1447 Handle group_hdl(current_thread, group_obj);
1448
1449 { // Cannot allow thread or group counts to change.
1450 ObjectLocker ol(group_hdl, current_thread);
1451
1452 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1453 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1454
1455 if (nthreads > 0) {
1456 ThreadsListHandle tlh(current_thread);
1457 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1458 assert(nthreads <= threads->length(), "too many threads");
1459 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1460 for (int i = 0, j = 0; i < nthreads; i++) {
1461 oop thread_obj = threads->obj_at(i);
1462 assert(thread_obj != NULL, "thread_obj is NULL");
1463 JavaThread *java_thread = NULL;
1464 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1465 if (err == JVMTI_ERROR_NONE) {
1466 // Have a valid JavaThread*.
1467 if (java_thread->is_hidden_from_external_view()) {
1468 // Filter out hidden java threads.
1469 hidden_threads++;
1470 continue;
1471 }
1472 } else {
1473 // We couldn't convert thread_obj into a JavaThread*.
1474 if (err == JVMTI_ERROR_INVALID_THREAD) {
1475 // The thread_obj does not refer to a java.lang.Thread object
1476 // so skip it.
1477 hidden_threads++;
1478 continue;
1479 }
1480 // We have a valid thread_obj, but no JavaThread*; the caller
1481 // can still have limited use for the thread_obj.
1482 }
1483 thread_objs[j++] = Handle(current_thread, thread_obj);
1484 }
1485 nthreads -= hidden_threads;
1486 } // ThreadsListHandle is destroyed here.
1487
1488 if (ngroups > 0) {
1489 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1490 assert(ngroups <= groups->length(), "too many groups");
1491 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1492 for (int i = 0; i < ngroups; i++) {
1493 oop group_obj = groups->obj_at(i);
1494 assert(group_obj != NULL, "group_obj != NULL");
1495 group_objs[i] = Handle(current_thread, group_obj);
1496 }
1497 }
1498 } // ThreadGroup unlocked here
1499
1500 *group_count_ptr = ngroups;
1501 *thread_count_ptr = nthreads;
1502 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1503 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1504 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1505 return JVMTI_ERROR_OUT_OF_MEMORY;
1506 }
1507 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1508 return JVMTI_ERROR_OUT_OF_MEMORY;
1509 }
1510
1511 return JVMTI_ERROR_NONE;
1512 } /* end GetThreadGroupChildren */
1513
1514
1515 //
1516 // Stack Frame functions
1517 //
1518
1519 // Threads_lock NOT held, java_thread not protected by lock
1520 // java_thread - pre-checked
1521 // max_frame_count - pre-checked to be greater than or equal to 0
1522 // frame_buffer - pre-checked for NULL
1523 // count_ptr - pre-checked for NULL
1524 jvmtiError
1525 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1526 jvmtiError err = JVMTI_ERROR_NONE;
1527
1528 // It is only safe to perform the direct operation on the current
1529 // thread. All other usage needs to use a vm-safepoint-op for safety.
1530 if (java_thread == JavaThread::current()) {
1531 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1532 } else {
1533 // JVMTI get stack trace at safepoint. Do not require target thread to
1534 // be suspended.
1535 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1536 VMThread::execute(&op);
1537 err = op.result();
1538 }
1539
1540 return err;
1541 } /* end GetStackTrace */
1542
1543
1544 // max_frame_count - pre-checked to be greater than or equal to 0
1545 // stack_info_ptr - pre-checked for NULL
1546 // thread_count_ptr - pre-checked for NULL
1547 jvmtiError
1548 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1549 jvmtiError err = JVMTI_ERROR_NONE;
1550 JavaThread* calling_thread = JavaThread::current();
1551
1552 // JVMTI get stack traces at safepoint.
1553 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1554 VMThread::execute(&op);
1555 *thread_count_ptr = op.final_thread_count();
1556 *stack_info_ptr = op.stack_info();
1557 err = op.result();
1558 return err;
1559 } /* end GetAllStackTraces */
1560
1561
1562 // thread_count - pre-checked to be greater than or equal to 0
1563 // thread_list - pre-checked for NULL
1564 // max_frame_count - pre-checked to be greater than or equal to 0
1565 // stack_info_ptr - pre-checked for NULL
1566 jvmtiError
1567 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1568 jvmtiError err = JVMTI_ERROR_NONE;
1569 // JVMTI get stack traces at safepoint.
1570 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1571 VMThread::execute(&op);
1572 err = op.result();
1573 if (err == JVMTI_ERROR_NONE) {
1574 *stack_info_ptr = op.stack_info();
1575 }
1576 return err;
1577 } /* end GetThreadListStackTraces */
1578
1579
1580 // Threads_lock NOT held, java_thread not protected by lock
1581 // java_thread - pre-checked
1582 // count_ptr - pre-checked for NULL
1583 jvmtiError
1584 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1585 jvmtiError err = JVMTI_ERROR_NONE;
1586
1587 // retrieve or create JvmtiThreadState.
1588 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1589 if (state == NULL) {
1590 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1591 }
1592
1593 // It is only safe to perform the direct operation on the current
1594 // thread. All other usage needs to use a vm-safepoint-op for safety.
1595 if (java_thread == JavaThread::current()) {
1596 err = get_frame_count(state, count_ptr);
1597 } else {
1598 // get java stack frame count at safepoint.
1599 VM_GetFrameCount op(this, state, count_ptr);
1600 VMThread::execute(&op);
1601 err = op.result();
1602 }
1603 return err;
1604 } /* end GetFrameCount */
1605
1606
1607 // Threads_lock NOT held, java_thread not protected by lock
1608 // java_thread - pre-checked
1609 jvmtiError
1610 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1611 JavaThread* current_thread = JavaThread::current();
1612 HandleMark hm(current_thread);
1613 uint32_t debug_bits = 0;
1614
1615 // retrieve or create the state
1616 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1617 if (state == NULL) {
1618 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1619 }
1620
1621 // Check if java_thread is fully suspended
1622 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1623 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1624 }
1625 // Check to see if a PopFrame was already in progress
1626 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1627 // Probably possible for JVMTI clients to trigger this, but the
1628 // JPDA backend shouldn't allow this to happen
1629 return JVMTI_ERROR_INTERNAL;
1630 }
1631
1632 {
1633 // Was workaround bug
1634 // 4812902: popFrame hangs if the method is waiting at a synchronize
1635 // Catch this condition and return an error to avoid hanging.
1636 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1637 OSThread* osThread = java_thread->osthread();
1638 if (osThread->get_state() == MONITOR_WAIT) {
1639 return JVMTI_ERROR_OPAQUE_FRAME;
1640 }
1641 }
1642
1643 {
1644 ResourceMark rm(current_thread);
1645 // Check if there are more than one Java frame in this thread, that the top two frames
1646 // are Java (not native) frames, and that there is no intervening VM frame
1647 int frame_count = 0;
1648 bool is_interpreted[2];
1649 intptr_t *frame_sp[2];
1650 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1651 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1652 methodHandle mh(current_thread, vfs.method());
1653 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1654 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1655 frame_sp[frame_count] = vfs.frame_id();
1656 if (++frame_count > 1) break;
1657 }
1658 if (frame_count < 2) {
1659 // We haven't found two adjacent non-native Java frames on the top.
1660 // There can be two situations here:
1661 // 1. There are no more java frames
1662 // 2. Two top java frames are separated by non-java native frames
1663 if(vframeFor(java_thread, 1) == NULL) {
1664 return JVMTI_ERROR_NO_MORE_FRAMES;
1665 } else {
1666 // Intervening non-java native or VM frames separate java frames.
1667 // Current implementation does not support this. See bug #5031735.
1668 // In theory it is possible to pop frames in such cases.
1669 return JVMTI_ERROR_OPAQUE_FRAME;
1670 }
1671 }
1672
1673 // If any of the top 2 frames is a compiled one, need to deoptimize it
1674 for (int i = 0; i < 2; i++) {
1675 if (!is_interpreted[i]) {
1676 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1677 }
1678 }
1679
1680 // Update the thread state to reflect that the top frame is popped
1681 // so that cur_stack_depth is maintained properly and all frameIDs
1682 // are invalidated.
1683 // The current frame will be popped later when the suspended thread
1684 // is resumed and right before returning from VM to Java.
1685 // (see call_VM_base() in assembler_<cpu>.cpp).
1686
1687 // It's fine to update the thread state here because no JVMTI events
1688 // shall be posted for this PopFrame.
1689
1690 // It is only safe to perform the direct operation on the current
1691 // thread. All other usage needs to use a vm-safepoint-op for safety.
1692 if (java_thread == JavaThread::current()) {
1693 state->update_for_pop_top_frame();
1694 } else {
1695 VM_UpdateForPopTopFrame op(state);
1696 VMThread::execute(&op);
1697 jvmtiError err = op.result();
1698 if (err != JVMTI_ERROR_NONE) {
1699 return err;
1700 }
1701 }
1702
1703 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1704 // Set pending step flag for this popframe and it is cleared when next
1705 // step event is posted.
1706 state->set_pending_step_for_popframe();
1707 }
1708
1709 return JVMTI_ERROR_NONE;
1710 } /* end PopFrame */
1711
1712
1713 // Threads_lock NOT held, java_thread not protected by lock
1714 // java_thread - pre-checked
1715 // java_thread - unchecked
1716 // depth - pre-checked as non-negative
1717 // method_ptr - pre-checked for NULL
1718 // location_ptr - pre-checked for NULL
1719 jvmtiError
1720 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1721 jvmtiError err = JVMTI_ERROR_NONE;
1722
1723 // It is only safe to perform the direct operation on the current
1724 // thread. All other usage needs to use a vm-safepoint-op for safety.
1725 if (java_thread == JavaThread::current()) {
1726 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1727 } else {
1728 // JVMTI get java stack frame location at safepoint.
1729 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1730 VMThread::execute(&op);
1731 err = op.result();
1732 }
1733 return err;
1734 } /* end GetFrameLocation */
1735
1736
1737 // Threads_lock NOT held, java_thread not protected by lock
1738 // java_thread - pre-checked
1739 // java_thread - unchecked
1740 // depth - pre-checked as non-negative
1741 jvmtiError
1742 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1743 jvmtiError err = JVMTI_ERROR_NONE;
1744 ResourceMark rm;
1745 uint32_t debug_bits = 0;
1746
1747 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1748 if (state == NULL) {
1749 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1750 }
1751
1752 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1753 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1754 }
1755
1756 if (TraceJVMTICalls) {
1757 JvmtiSuspendControl::print();
1758 }
1759
1760 vframe *vf = vframeFor(java_thread, depth);
1761 if (vf == NULL) {
1762 return JVMTI_ERROR_NO_MORE_FRAMES;
1763 }
1764
1765 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1766 return JVMTI_ERROR_OPAQUE_FRAME;
1767 }
1768
1769 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1770
1771 // It is only safe to perform the direct operation on the current
1772 // thread. All other usage needs to use a vm-safepoint-op for safety.
1773 if (java_thread == JavaThread::current()) {
1774 int frame_number = state->count_frames() - depth;
1775 state->env_thread_state(this)->set_frame_pop(frame_number);
1776 } else {
1777 VM_SetFramePop op(this, state, depth);
1778 VMThread::execute(&op);
1779 err = op.result();
1780 }
1781 return err;
1782 } /* end NotifyFramePop */
1783
1784
1785 //
1786 // Force Early Return functions
1787 //
1788
1789 // Threads_lock NOT held, java_thread not protected by lock
1790 // java_thread - pre-checked
1791 jvmtiError
1792 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1793 jvalue val;
1794 val.l = value;
1795 return force_early_return(java_thread, val, atos);
1796 } /* end ForceEarlyReturnObject */
1797
1798
1799 // Threads_lock NOT held, java_thread not protected by lock
1800 // java_thread - pre-checked
1801 jvmtiError
1802 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1803 jvalue val;
1804 val.i = value;
1805 return force_early_return(java_thread, val, itos);
1806 } /* end ForceEarlyReturnInt */
1807
1808
1809 // Threads_lock NOT held, java_thread not protected by lock
1810 // java_thread - pre-checked
1811 jvmtiError
1812 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1813 jvalue val;
1814 val.j = value;
1815 return force_early_return(java_thread, val, ltos);
1816 } /* end ForceEarlyReturnLong */
1817
1818
1819 // Threads_lock NOT held, java_thread not protected by lock
1820 // java_thread - pre-checked
1821 jvmtiError
1822 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1823 jvalue val;
1824 val.f = value;
1825 return force_early_return(java_thread, val, ftos);
1826 } /* end ForceEarlyReturnFloat */
1827
1828
1829 // Threads_lock NOT held, java_thread not protected by lock
1830 // java_thread - pre-checked
1831 jvmtiError
1832 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1833 jvalue val;
1834 val.d = value;
1835 return force_early_return(java_thread, val, dtos);
1836 } /* end ForceEarlyReturnDouble */
1837
1838
1839 // Threads_lock NOT held, java_thread not protected by lock
1840 // java_thread - pre-checked
1841 jvmtiError
1842 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1843 jvalue val;
1844 val.j = 0L;
1845 return force_early_return(java_thread, val, vtos);
1846 } /* end ForceEarlyReturnVoid */
1847
1848
1849 //
1850 // Heap functions
1851 //
1852
1853 // klass - NULL is a valid value, must be checked
1854 // initial_object - NULL is a valid value, must be checked
1855 // callbacks - pre-checked for NULL
1856 // user_data - NULL is a valid value, must be checked
1857 jvmtiError
1858 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1859 // check klass if provided
1860 Klass* k = NULL;
1861 if (klass != NULL) {
1862 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1863 if (k_mirror == NULL) {
1864 return JVMTI_ERROR_INVALID_CLASS;
1865 }
1866 if (java_lang_Class::is_primitive(k_mirror)) {
1867 return JVMTI_ERROR_NONE;
1868 }
1869 k = java_lang_Class::as_Klass(k_mirror);
1870 if (klass == NULL) {
1871 return JVMTI_ERROR_INVALID_CLASS;
1872 }
1873 }
1874
1875 if (initial_object != NULL) {
1876 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1877 if (init_obj == NULL) {
1878 return JVMTI_ERROR_INVALID_OBJECT;
1879 }
1880 }
1881
1882 Thread *thread = Thread::current();
1883 HandleMark hm(thread);
1884
1885 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1886 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1887 return JVMTI_ERROR_NONE;
1888 } /* end FollowReferences */
1889
1890
1891 // klass - NULL is a valid value, must be checked
1892 // callbacks - pre-checked for NULL
1893 // user_data - NULL is a valid value, must be checked
1894 jvmtiError
1895 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1896 // check klass if provided
1897 Klass* k = NULL;
1898 if (klass != NULL) {
1899 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1900 if (k_mirror == NULL) {
1901 return JVMTI_ERROR_INVALID_CLASS;
1902 }
1903 if (java_lang_Class::is_primitive(k_mirror)) {
1904 return JVMTI_ERROR_NONE;
1905 }
1906 k = java_lang_Class::as_Klass(k_mirror);
1907 if (k == NULL) {
1908 return JVMTI_ERROR_INVALID_CLASS;
1909 }
1910 }
1911
1912 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1913 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1914 return JVMTI_ERROR_NONE;
1915 } /* end IterateThroughHeap */
1916
1917
1918 // tag_ptr - pre-checked for NULL
1919 jvmtiError
1920 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1921 oop o = JNIHandles::resolve_external_guard(object);
1922 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1923 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1924 return JVMTI_ERROR_NONE;
1925 } /* end GetTag */
1926
1927
1928 jvmtiError
1929 JvmtiEnv::SetTag(jobject object, jlong tag) {
1930 oop o = JNIHandles::resolve_external_guard(object);
1931 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1932 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1933 return JVMTI_ERROR_NONE;
1934 } /* end SetTag */
1935
1936
1937 // tag_count - pre-checked to be greater than or equal to 0
1938 // tags - pre-checked for NULL
1939 // count_ptr - pre-checked for NULL
1940 // object_result_ptr - NULL is a valid value, must be checked
1941 // tag_result_ptr - NULL is a valid value, must be checked
1942 jvmtiError
1943 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1944 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1945 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1946 } /* end GetObjectsWithTags */
1947
1948
1949 jvmtiError
1950 JvmtiEnv::ForceGarbageCollection() {
1951 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1952 return JVMTI_ERROR_NONE;
1953 } /* end ForceGarbageCollection */
1954
1955
1956 //
1957 // Heap (1.0) functions
1958 //
1959
1960 // object_reference_callback - pre-checked for NULL
1961 // user_data - NULL is a valid value, must be checked
1962 jvmtiError
1963 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1964 oop o = JNIHandles::resolve_external_guard(object);
1965 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1966 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1967 return JVMTI_ERROR_NONE;
1968 } /* end IterateOverObjectsReachableFromObject */
1969
1970
1971 // heap_root_callback - NULL is a valid value, must be checked
1972 // stack_ref_callback - NULL is a valid value, must be checked
1973 // object_ref_callback - NULL is a valid value, must be checked
1974 // user_data - NULL is a valid value, must be checked
1975 jvmtiError
1976 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1977 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1978 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1979 return JVMTI_ERROR_NONE;
1980 } /* end IterateOverReachableObjects */
1981
1982
1983 // heap_object_callback - pre-checked for NULL
1984 // user_data - NULL is a valid value, must be checked
1985 jvmtiError
1986 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1987 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1988 Thread *thread = Thread::current();
1989 HandleMark hm(thread);
1990 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
1991 return JVMTI_ERROR_NONE;
1992 } /* end IterateOverHeap */
1993
1994
1995 // k_mirror - may be primitive, this must be checked
1996 // heap_object_callback - pre-checked for NULL
1997 // user_data - NULL is a valid value, must be checked
1998 jvmtiError
1999 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2000 if (java_lang_Class::is_primitive(k_mirror)) {
2001 // DO PRIMITIVE CLASS PROCESSING
2002 return JVMTI_ERROR_NONE;
2003 }
2004 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2005 if (klass == NULL) {
2006 return JVMTI_ERROR_INVALID_CLASS;
2007 }
2008 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2009 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2010 return JVMTI_ERROR_NONE;
2011 } /* end IterateOverInstancesOfClass */
2012
2013
2014 //
2015 // Local Variable functions
2016 //
2017
2018 // Threads_lock NOT held, java_thread not protected by lock
2019 // java_thread - pre-checked
2020 // java_thread - unchecked
2021 // depth - pre-checked as non-negative
2022 // value_ptr - pre-checked for NULL
2023 jvmtiError
2024 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2025 JavaThread* current_thread = JavaThread::current();
2026 // rm object is created to clean up the javaVFrame created in
2027 // doit_prologue(), but after doit() is finished with it.
2028 ResourceMark rm(current_thread);
2029
2030 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2031 VMThread::execute(&op);
2032 jvmtiError err = op.result();
2033 if (err != JVMTI_ERROR_NONE) {
2034 return err;
2035 } else {
2036 *value_ptr = op.value().l;
2037 return JVMTI_ERROR_NONE;
2038 }
2039 } /* end GetLocalObject */
2040
2041 // Threads_lock NOT held, java_thread not protected by lock
2042 // java_thread - pre-checked
2043 // java_thread - unchecked
2044 // depth - pre-checked as non-negative
2045 // value - pre-checked for NULL
2046 jvmtiError
2047 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2048 JavaThread* current_thread = JavaThread::current();
2049 // rm object is created to clean up the javaVFrame created in
2050 // doit_prologue(), but after doit() is finished with it.
2051 ResourceMark rm(current_thread);
2052
2053 VM_GetReceiver op(java_thread, current_thread, depth);
2054 VMThread::execute(&op);
2055 jvmtiError err = op.result();
2056 if (err != JVMTI_ERROR_NONE) {
2057 return err;
2058 } else {
2059 *value_ptr = op.value().l;
2060 return JVMTI_ERROR_NONE;
2061 }
2062 } /* end GetLocalInstance */
2063
2064
2065 // Threads_lock NOT held, java_thread not protected by lock
2066 // java_thread - pre-checked
2067 // java_thread - unchecked
2068 // depth - pre-checked as non-negative
2069 // value_ptr - pre-checked for NULL
2070 jvmtiError
2071 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2072 // rm object is created to clean up the javaVFrame created in
2073 // doit_prologue(), but after doit() is finished with it.
2074 ResourceMark rm;
2075
2076 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2077 VMThread::execute(&op);
2078 *value_ptr = op.value().i;
2079 return op.result();
2080 } /* end GetLocalInt */
2081
2082
2083 // Threads_lock NOT held, java_thread not protected by lock
2084 // java_thread - pre-checked
2085 // java_thread - unchecked
2086 // depth - pre-checked as non-negative
2087 // value_ptr - pre-checked for NULL
2088 jvmtiError
2089 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2090 // rm object is created to clean up the javaVFrame created in
2091 // doit_prologue(), but after doit() is finished with it.
2092 ResourceMark rm;
2093
2094 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2095 VMThread::execute(&op);
2096 *value_ptr = op.value().j;
2097 return op.result();
2098 } /* end GetLocalLong */
2099
2100
2101 // Threads_lock NOT held, java_thread not protected by lock
2102 // java_thread - pre-checked
2103 // java_thread - unchecked
2104 // depth - pre-checked as non-negative
2105 // value_ptr - pre-checked for NULL
2106 jvmtiError
2107 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2108 // rm object is created to clean up the javaVFrame created in
2109 // doit_prologue(), but after doit() is finished with it.
2110 ResourceMark rm;
2111
2112 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2113 VMThread::execute(&op);
2114 *value_ptr = op.value().f;
2115 return op.result();
2116 } /* end GetLocalFloat */
2117
2118
2119 // Threads_lock NOT held, java_thread not protected by lock
2120 // java_thread - pre-checked
2121 // java_thread - unchecked
2122 // depth - pre-checked as non-negative
2123 // value_ptr - pre-checked for NULL
2124 jvmtiError
2125 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2126 // rm object is created to clean up the javaVFrame created in
2127 // doit_prologue(), but after doit() is finished with it.
2128 ResourceMark rm;
2129
2130 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2131 VMThread::execute(&op);
2132 *value_ptr = op.value().d;
2133 return op.result();
2134 } /* end GetLocalDouble */
2135
2136
2137 // Threads_lock NOT held, java_thread not protected by lock
2138 // java_thread - pre-checked
2139 // java_thread - unchecked
2140 // depth - pre-checked as non-negative
2141 jvmtiError
2142 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2143 // rm object is created to clean up the javaVFrame created in
2144 // doit_prologue(), but after doit() is finished with it.
2145 ResourceMark rm;
2146 jvalue val;
2147 val.l = value;
2148 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2149 VMThread::execute(&op);
2150 return op.result();
2151 } /* end SetLocalObject */
2152
2153
2154 // Threads_lock NOT held, java_thread not protected by lock
2155 // java_thread - pre-checked
2156 // java_thread - unchecked
2157 // depth - pre-checked as non-negative
2158 jvmtiError
2159 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2160 // rm object is created to clean up the javaVFrame created in
2161 // doit_prologue(), but after doit() is finished with it.
2162 ResourceMark rm;
2163 jvalue val;
2164 val.i = value;
2165 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2166 VMThread::execute(&op);
2167 return op.result();
2168 } /* end SetLocalInt */
2169
2170
2171 // Threads_lock NOT held, java_thread not protected by lock
2172 // java_thread - pre-checked
2173 // java_thread - unchecked
2174 // depth - pre-checked as non-negative
2175 jvmtiError
2176 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2177 // rm object is created to clean up the javaVFrame created in
2178 // doit_prologue(), but after doit() is finished with it.
2179 ResourceMark rm;
2180 jvalue val;
2181 val.j = value;
2182 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2183 VMThread::execute(&op);
2184 return op.result();
2185 } /* end SetLocalLong */
2186
2187
2188 // Threads_lock NOT held, java_thread not protected by lock
2189 // java_thread - pre-checked
2190 // java_thread - unchecked
2191 // depth - pre-checked as non-negative
2192 jvmtiError
2193 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2194 // rm object is created to clean up the javaVFrame created in
2195 // doit_prologue(), but after doit() is finished with it.
2196 ResourceMark rm;
2197 jvalue val;
2198 val.f = value;
2199 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2200 VMThread::execute(&op);
2201 return op.result();
2202 } /* end SetLocalFloat */
2203
2204
2205 // Threads_lock NOT held, java_thread not protected by lock
2206 // java_thread - pre-checked
2207 // java_thread - unchecked
2208 // depth - pre-checked as non-negative
2209 jvmtiError
2210 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2211 // rm object is created to clean up the javaVFrame created in
2212 // doit_prologue(), but after doit() is finished with it.
2213 ResourceMark rm;
2214 jvalue val;
2215 val.d = value;
2216 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2217 VMThread::execute(&op);
2218 return op.result();
2219 } /* end SetLocalDouble */
2220
2221
2222 //
2223 // Breakpoint functions
2224 //
2225
2226 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2227 jvmtiError
2228 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2229 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2230 if (location < 0) { // simple invalid location check first
2231 return JVMTI_ERROR_INVALID_LOCATION;
2232 }
2233 // verify that the breakpoint is not past the end of the method
2234 if (location >= (jlocation) method_oop->code_size()) {
2235 return JVMTI_ERROR_INVALID_LOCATION;
2236 }
2237
2238 ResourceMark rm;
2239 JvmtiBreakpoint bp(method_oop, location);
2240 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2241 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2242 return JVMTI_ERROR_DUPLICATE;
2243
2244 if (TraceJVMTICalls) {
2245 jvmti_breakpoints.print();
2246 }
2247
2248 return JVMTI_ERROR_NONE;
2249 } /* end SetBreakpoint */
2250
2251
2252 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2253 jvmtiError
2254 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2255 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2256
2257 if (location < 0) { // simple invalid location check first
2258 return JVMTI_ERROR_INVALID_LOCATION;
2259 }
2260
2261 // verify that the breakpoint is not past the end of the method
2262 if (location >= (jlocation) method_oop->code_size()) {
2263 return JVMTI_ERROR_INVALID_LOCATION;
2264 }
2265
2266 JvmtiBreakpoint bp(method_oop, location);
2267
2268 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2269 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2270 return JVMTI_ERROR_NOT_FOUND;
2271
2272 if (TraceJVMTICalls) {
2273 jvmti_breakpoints.print();
2274 }
2275
2276 return JVMTI_ERROR_NONE;
2277 } /* end ClearBreakpoint */
2278
2279
2280 //
2281 // Watched Field functions
2282 //
2283
2284 jvmtiError
2285 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2286 // make sure we haven't set this watch before
2287 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2288 fdesc_ptr->set_is_field_access_watched(true);
2289
2290 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2291
2292 return JVMTI_ERROR_NONE;
2293 } /* end SetFieldAccessWatch */
2294
2295
2296 jvmtiError
2297 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2298 // make sure we have a watch to clear
2299 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2300 fdesc_ptr->set_is_field_access_watched(false);
2301
2302 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2303
2304 return JVMTI_ERROR_NONE;
2305 } /* end ClearFieldAccessWatch */
2306
2307
2308 jvmtiError
2309 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2310 // make sure we haven't set this watch before
2311 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2312 fdesc_ptr->set_is_field_modification_watched(true);
2313
2314 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2315
2316 return JVMTI_ERROR_NONE;
2317 } /* end SetFieldModificationWatch */
2318
2319
2320 jvmtiError
2321 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2322 // make sure we have a watch to clear
2323 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2324 fdesc_ptr->set_is_field_modification_watched(false);
2325
2326 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2327
2328 return JVMTI_ERROR_NONE;
2329 } /* end ClearFieldModificationWatch */
2330
2331 //
2332 // Class functions
2333 //
2334
2335
2336 // k_mirror - may be primitive, this must be checked
2337 // signature_ptr - NULL is a valid value, must be checked
2338 // generic_ptr - NULL is a valid value, must be checked
2339 jvmtiError
2340 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2341 ResourceMark rm;
2342 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2343 Klass* k = NULL;
2344 if (!isPrimitive) {
2345 k = java_lang_Class::as_Klass(k_mirror);
2346 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2347 }
2348 if (signature_ptr != NULL) {
2349 char* result = NULL;
2350 if (isPrimitive) {
2351 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2352 result = (char*) jvmtiMalloc(2);
2353 result[0] = tchar;
2354 result[1] = '\0';
2355 } else {
2356 const char* class_sig = k->signature_name();
2357 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2358 strcpy(result, class_sig);
2359 }
2360 *signature_ptr = result;
2361 }
2362 if (generic_ptr != NULL) {
2363 *generic_ptr = NULL;
2364 if (!isPrimitive && k->is_instance_klass()) {
2365 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2366 if (soo != NULL) {
2367 const char *gen_sig = soo->as_C_string();
2368 if (gen_sig != NULL) {
2369 char* gen_result;
2370 jvmtiError err = allocate(strlen(gen_sig) + 1,
2371 (unsigned char **)&gen_result);
2372 if (err != JVMTI_ERROR_NONE) {
2373 return err;
2374 }
2375 strcpy(gen_result, gen_sig);
2376 *generic_ptr = gen_result;
2377 }
2378 }
2379 }
2380 }
2381 return JVMTI_ERROR_NONE;
2382 } /* end GetClassSignature */
2383
2384
2385 // k_mirror - may be primitive, this must be checked
2386 // status_ptr - pre-checked for NULL
2387 jvmtiError
2388 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2389 jint result = 0;
2390 if (java_lang_Class::is_primitive(k_mirror)) {
2391 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2392 } else {
2393 Klass* k = java_lang_Class::as_Klass(k_mirror);
2394 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2395 result = k->jvmti_class_status();
2396 }
2397 *status_ptr = result;
2398
2399 return JVMTI_ERROR_NONE;
2400 } /* end GetClassStatus */
2401
2402
2403 // k_mirror - may be primitive, this must be checked
2404 // source_name_ptr - pre-checked for NULL
2405 jvmtiError
2406 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2407 if (java_lang_Class::is_primitive(k_mirror)) {
2408 return JVMTI_ERROR_ABSENT_INFORMATION;
2409 }
2410 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2411 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2412
2413 if (!k_klass->is_instance_klass()) {
2414 return JVMTI_ERROR_ABSENT_INFORMATION;
2415 }
2416
2417 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2418 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2419 {
2420 JavaThread* current_thread = JavaThread::current();
2421 ResourceMark rm(current_thread);
2422 const char* sfncp = (const char*) sfnOop->as_C_string();
2423 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2424 strcpy(*source_name_ptr, sfncp);
2425 }
2426
2427 return JVMTI_ERROR_NONE;
2428 } /* end GetSourceFileName */
2429
2430
2431 // k_mirror - may be primitive, this must be checked
2432 // modifiers_ptr - pre-checked for NULL
2433 jvmtiError
2434 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2435 JavaThread* current_thread = JavaThread::current();
2436 jint result = 0;
2437 if (!java_lang_Class::is_primitive(k_mirror)) {
2438 Klass* k = java_lang_Class::as_Klass(k_mirror);
2439 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2440 result = k->compute_modifier_flags(current_thread);
2441 JavaThread* THREAD = current_thread; // pass to macros
2442 if (HAS_PENDING_EXCEPTION) {
2443 CLEAR_PENDING_EXCEPTION;
2444 return JVMTI_ERROR_INTERNAL;
2445 };
2446
2447 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2448 if(k->is_super()) {
2449 result |= JVM_ACC_SUPER;
2450 }
2451 } else {
2452 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2453 }
2454 *modifiers_ptr = result;
2455
2456 return JVMTI_ERROR_NONE;
2457 } /* end GetClassModifiers */
2458
2459
2460 // k_mirror - may be primitive, this must be checked
2461 // method_count_ptr - pre-checked for NULL
2462 // methods_ptr - pre-checked for NULL
2463 jvmtiError
2464 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2465 JavaThread* current_thread = JavaThread::current();
2466 HandleMark hm(current_thread);
2467
2468 if (java_lang_Class::is_primitive(k_mirror)) {
2469 *method_count_ptr = 0;
2470 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2471 return JVMTI_ERROR_NONE;
2472 }
2473 Klass* k = java_lang_Class::as_Klass(k_mirror);
2474 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2475
2476 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2477 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2478 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2479 }
2480
2481 if (!k->is_instance_klass()) {
2482 *method_count_ptr = 0;
2483 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2484 return JVMTI_ERROR_NONE;
2485 }
2486 InstanceKlass* ik = InstanceKlass::cast(k);
2487 // Allocate the result and fill it in
2488 int result_length = ik->methods()->length();
2489 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2490 int index;
2491 bool jmethodids_found = true;
2492
2493 if (JvmtiExport::can_maintain_original_method_order()) {
2494 // Use the original method ordering indices stored in the class, so we can emit
2495 // jmethodIDs in the order they appeared in the class file
2496 for (index = 0; index < result_length; index++) {
2497 Method* m = ik->methods()->at(index);
2498 int original_index = ik->method_ordering()->at(index);
2499 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2500 jmethodID id;
2501 if (jmethodids_found) {
2502 id = m->find_jmethod_id_or_null();
2503 if (id == NULL) {
2504 // If we find an uninitialized value, make sure there is
2505 // enough space for all the uninitialized values we might
2506 // find.
2507 ik->ensure_space_for_methodids(index);
2508 jmethodids_found = false;
2509 id = m->jmethod_id();
2510 }
2511 } else {
2512 id = m->jmethod_id();
2513 }
2514 result_list[original_index] = id;
2515 }
2516 } else {
2517 // otherwise just copy in any order
2518 for (index = 0; index < result_length; index++) {
2519 Method* m = ik->methods()->at(index);
2520 jmethodID id;
2521 if (jmethodids_found) {
2522 id = m->find_jmethod_id_or_null();
2523 if (id == NULL) {
2524 // If we find an uninitialized value, make sure there is
2525 // enough space for all the uninitialized values we might
2526 // find.
2527 ik->ensure_space_for_methodids(index);
2528 jmethodids_found = false;
2529 id = m->jmethod_id();
2530 }
2531 } else {
2532 id = m->jmethod_id();
2533 }
2534 result_list[index] = id;
2535 }
2536 }
2537 // Fill in return value.
2538 *method_count_ptr = result_length;
2539 *methods_ptr = result_list;
2540
2541 return JVMTI_ERROR_NONE;
2542 } /* end GetClassMethods */
2543
2544
2545 // k_mirror - may be primitive, this must be checked
2546 // field_count_ptr - pre-checked for NULL
2547 // fields_ptr - pre-checked for NULL
2548 jvmtiError
2549 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2550 if (java_lang_Class::is_primitive(k_mirror)) {
2551 *field_count_ptr = 0;
2552 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2553 return JVMTI_ERROR_NONE;
2554 }
2555 JavaThread* current_thread = JavaThread::current();
2556 HandleMark hm(current_thread);
2557 Klass* k = java_lang_Class::as_Klass(k_mirror);
2558 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2559
2560 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2561 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2562 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2563 }
2564
2565 if (!k->is_instance_klass()) {
2566 *field_count_ptr = 0;
2567 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2568 return JVMTI_ERROR_NONE;
2569 }
2570
2571
2572 InstanceKlass* ik = InstanceKlass::cast(k);
2573
2574 int result_count = 0;
2575 // First, count the fields.
2576 FilteredFieldStream flds(ik, true, true);
2577 result_count = flds.field_count();
2578
2579 // Allocate the result and fill it in
2580 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2581 // The JVMTI spec requires fields in the order they occur in the class file,
2582 // this is the reverse order of what FieldStream hands out.
2583 int id_index = (result_count - 1);
2584
2585 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2586 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2587 ik, src_st.offset(),
2588 src_st.access_flags().is_static());
2589 }
2590 assert(id_index == -1, "just checking");
2591 // Fill in the results
2592 *field_count_ptr = result_count;
2593 *fields_ptr = result_list;
2594
2595 return JVMTI_ERROR_NONE;
2596 } /* end GetClassFields */
2597
2598
2599 // k_mirror - may be primitive, this must be checked
2600 // interface_count_ptr - pre-checked for NULL
2601 // interfaces_ptr - pre-checked for NULL
2602 jvmtiError
2603 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2604 {
2605 if (java_lang_Class::is_primitive(k_mirror)) {
2606 *interface_count_ptr = 0;
2607 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2608 return JVMTI_ERROR_NONE;
2609 }
2610 JavaThread* current_thread = JavaThread::current();
2611 HandleMark hm(current_thread);
2612 Klass* k = java_lang_Class::as_Klass(k_mirror);
2613 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2614
2615 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2616 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2617 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2618
2619 if (!k->is_instance_klass()) {
2620 *interface_count_ptr = 0;
2621 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2622 return JVMTI_ERROR_NONE;
2623 }
2624
2625 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2626 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2627 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2628 for (int i_index = 0; i_index < result_length; i_index += 1) {
2629 InstanceKlass* klass_at = interface_list->at(i_index);
2630 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2631 assert(klass_at->is_interface(), "interfaces must be interfaces");
2632 oop mirror_at = klass_at->java_mirror();
2633 Handle handle_at = Handle(current_thread, mirror_at);
2634 result_list[i_index] = (jclass) jni_reference(handle_at);
2635 }
2636 *interface_count_ptr = result_length;
2637 *interfaces_ptr = result_list;
2638 }
2639
2640 return JVMTI_ERROR_NONE;
2641 } /* end GetImplementedInterfaces */
2642
2643
2644 // k_mirror - may be primitive, this must be checked
2645 // minor_version_ptr - pre-checked for NULL
2646 // major_version_ptr - pre-checked for NULL
2647 jvmtiError
2648 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2649 if (java_lang_Class::is_primitive(k_mirror)) {
2650 return JVMTI_ERROR_ABSENT_INFORMATION;
2651 }
2652 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2653
2654 jint status = klass->jvmti_class_status();
2655 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2656 return JVMTI_ERROR_INVALID_CLASS;
2657 }
2658 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2659 return JVMTI_ERROR_ABSENT_INFORMATION;
2660 }
2661
2662 InstanceKlass* ik = InstanceKlass::cast(klass);
2663 *minor_version_ptr = ik->minor_version();
2664 *major_version_ptr = ik->major_version();
2665
2666 return JVMTI_ERROR_NONE;
2667 } /* end GetClassVersionNumbers */
2668
2669
2670 // k_mirror - may be primitive, this must be checked
2671 // constant_pool_count_ptr - pre-checked for NULL
2672 // constant_pool_byte_count_ptr - pre-checked for NULL
2673 // constant_pool_bytes_ptr - pre-checked for NULL
2674 jvmtiError
2675 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2676 if (java_lang_Class::is_primitive(k_mirror)) {
2677 return JVMTI_ERROR_ABSENT_INFORMATION;
2678 }
2679
2680 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2681 Thread *thread = Thread::current();
2682 ResourceMark rm(thread);
2683
2684 jint status = klass->jvmti_class_status();
2685 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2686 return JVMTI_ERROR_INVALID_CLASS;
2687 }
2688 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2689 return JVMTI_ERROR_ABSENT_INFORMATION;
2690 }
2691
2692 InstanceKlass* ik = InstanceKlass::cast(klass);
2693 JvmtiConstantPoolReconstituter reconstituter(ik);
2694 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2695 return reconstituter.get_error();
2696 }
2697
2698 unsigned char *cpool_bytes;
2699 int cpool_size = reconstituter.cpool_size();
2700 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2701 return reconstituter.get_error();
2702 }
2703 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2704 if (res != JVMTI_ERROR_NONE) {
2705 return res;
2706 }
2707 reconstituter.copy_cpool_bytes(cpool_bytes);
2708 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2709 return reconstituter.get_error();
2710 }
2711
2712 constantPoolHandle constants(thread, ik->constants());
2713 *constant_pool_count_ptr = constants->length();
2714 *constant_pool_byte_count_ptr = cpool_size;
2715 *constant_pool_bytes_ptr = cpool_bytes;
2716
2717 return JVMTI_ERROR_NONE;
2718 } /* end GetConstantPool */
2719
2720
2721 // k_mirror - may be primitive, this must be checked
2722 // is_interface_ptr - pre-checked for NULL
2723 jvmtiError
2724 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2725 {
2726 bool result = false;
2727 if (!java_lang_Class::is_primitive(k_mirror)) {
2728 Klass* k = java_lang_Class::as_Klass(k_mirror);
2729 if (k != NULL && k->is_interface()) {
2730 result = true;
2731 }
2732 }
2733 *is_interface_ptr = result;
2734 }
2735
2736 return JVMTI_ERROR_NONE;
2737 } /* end IsInterface */
2738
2739
2740 // k_mirror - may be primitive, this must be checked
2741 // is_array_class_ptr - pre-checked for NULL
2742 jvmtiError
2743 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2744 {
2745 bool result = false;
2746 if (!java_lang_Class::is_primitive(k_mirror)) {
2747 Klass* k = java_lang_Class::as_Klass(k_mirror);
2748 if (k != NULL && k->is_array_klass()) {
2749 result = true;
2750 }
2751 }
2752 *is_array_class_ptr = result;
2753 }
2754
2755 return JVMTI_ERROR_NONE;
2756 } /* end IsArrayClass */
2757
2758
2759 // k_mirror - may be primitive, this must be checked
2760 // classloader_ptr - pre-checked for NULL
2761 jvmtiError
2762 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2763 {
2764 if (java_lang_Class::is_primitive(k_mirror)) {
2765 *classloader_ptr = (jclass) jni_reference(Handle());
2766 return JVMTI_ERROR_NONE;
2767 }
2768 JavaThread* current_thread = JavaThread::current();
2769 HandleMark hm(current_thread);
2770 Klass* k = java_lang_Class::as_Klass(k_mirror);
2771 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2772
2773 oop result_oop = k->class_loader();
2774 if (result_oop == NULL) {
2775 *classloader_ptr = (jclass) jni_reference(Handle());
2776 return JVMTI_ERROR_NONE;
2777 }
2778 Handle result_handle = Handle(current_thread, result_oop);
2779 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2780 *classloader_ptr = result_jnihandle;
2781 }
2782 return JVMTI_ERROR_NONE;
2783 } /* end GetClassLoader */
2784
2785
2786 // k_mirror - may be primitive, this must be checked
2787 // source_debug_extension_ptr - pre-checked for NULL
2788 jvmtiError
2789 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2790 {
2791 if (java_lang_Class::is_primitive(k_mirror)) {
2792 return JVMTI_ERROR_ABSENT_INFORMATION;
2793 }
2794 Klass* k = java_lang_Class::as_Klass(k_mirror);
2795 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2796 if (!k->is_instance_klass()) {
2797 return JVMTI_ERROR_ABSENT_INFORMATION;
2798 }
2799 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2800 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2801
2802 {
2803 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2804 strcpy(*source_debug_extension_ptr, sde);
2805 }
2806 }
2807
2808 return JVMTI_ERROR_NONE;
2809 } /* end GetSourceDebugExtension */
2810
2811 //
2812 // Object functions
2813 //
2814
2815 // hash_code_ptr - pre-checked for NULL
2816 jvmtiError
2817 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2818 oop mirror = JNIHandles::resolve_external_guard(object);
2819 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2820 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2821
2822 {
2823 jint result = (jint) mirror->identity_hash();
2824 *hash_code_ptr = result;
2825 }
2826 return JVMTI_ERROR_NONE;
2827 } /* end GetObjectHashCode */
2828
2829
2830 // info_ptr - pre-checked for NULL
2831 jvmtiError
2832 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2833 JavaThread* calling_thread = JavaThread::current();
2834 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2835 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2836 // Some of the critical threads were not suspended. go to a safepoint and try again
2837 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2838 VMThread::execute(&op);
2839 err = op.result();
2840 }
2841 return err;
2842 } /* end GetObjectMonitorUsage */
2843
2844
2845 //
2846 // Field functions
2847 //
2848
2849 // name_ptr - NULL is a valid value, must be checked
2850 // signature_ptr - NULL is a valid value, must be checked
2851 // generic_ptr - NULL is a valid value, must be checked
2852 jvmtiError
2853 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2854 JavaThread* current_thread = JavaThread::current();
2855 ResourceMark rm(current_thread);
2856 if (name_ptr == NULL) {
2857 // just don't return the name
2858 } else {
2859 const char* fieldName = fdesc_ptr->name()->as_C_string();
2860 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2861 if (*name_ptr == NULL)
2862 return JVMTI_ERROR_OUT_OF_MEMORY;
2863 strcpy(*name_ptr, fieldName);
2864 }
2865 if (signature_ptr== NULL) {
2866 // just don't return the signature
2867 } else {
2868 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2869 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2870 if (*signature_ptr == NULL)
2871 return JVMTI_ERROR_OUT_OF_MEMORY;
2872 strcpy(*signature_ptr, fieldSignature);
2873 }
2874 if (generic_ptr != NULL) {
2875 *generic_ptr = NULL;
2876 Symbol* soop = fdesc_ptr->generic_signature();
2877 if (soop != NULL) {
2878 const char* gen_sig = soop->as_C_string();
2879 if (gen_sig != NULL) {
2880 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2881 if (err != JVMTI_ERROR_NONE) {
2882 return err;
2883 }
2884 strcpy(*generic_ptr, gen_sig);
2885 }
2886 }
2887 }
2888 return JVMTI_ERROR_NONE;
2889 } /* end GetFieldName */
2890
2891
2892 // declaring_class_ptr - pre-checked for NULL
2893 jvmtiError
2894 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2895
2896 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2897 return JVMTI_ERROR_NONE;
2898 } /* end GetFieldDeclaringClass */
2899
2900
2901 // modifiers_ptr - pre-checked for NULL
2902 jvmtiError
2903 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2904
2905 AccessFlags resultFlags = fdesc_ptr->access_flags();
2906 jint result = resultFlags.as_int();
2907 *modifiers_ptr = result;
2908
2909 return JVMTI_ERROR_NONE;
2910 } /* end GetFieldModifiers */
2911
2912
2913 // is_synthetic_ptr - pre-checked for NULL
2914 jvmtiError
2915 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2916 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2917 return JVMTI_ERROR_NONE;
2918 } /* end IsFieldSynthetic */
2919
2920
2921 //
2922 // Method functions
2923 //
2924
2925 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2926 // name_ptr - NULL is a valid value, must be checked
2927 // signature_ptr - NULL is a valid value, must be checked
2928 // generic_ptr - NULL is a valid value, must be checked
2929 jvmtiError
2930 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2931 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2932 JavaThread* current_thread = JavaThread::current();
2933
2934 ResourceMark rm(current_thread); // get the utf8 name and signature
2935 if (name_ptr == NULL) {
2936 // just don't return the name
2937 } else {
2938 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2939 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2940 strcpy(*name_ptr, utf8_name);
2941 }
2942 if (signature_ptr == NULL) {
2943 // just don't return the signature
2944 } else {
2945 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2946 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2947 strcpy(*signature_ptr, utf8_signature);
2948 }
2949
2950 if (generic_ptr != NULL) {
2951 *generic_ptr = NULL;
2952 Symbol* soop = method_oop->generic_signature();
2953 if (soop != NULL) {
2954 const char* gen_sig = soop->as_C_string();
2955 if (gen_sig != NULL) {
2956 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2957 if (err != JVMTI_ERROR_NONE) {
2958 return err;
2959 }
2960 strcpy(*generic_ptr, gen_sig);
2961 }
2962 }
2963 }
2964 return JVMTI_ERROR_NONE;
2965 } /* end GetMethodName */
2966
2967
2968 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2969 // declaring_class_ptr - pre-checked for NULL
2970 jvmtiError
2971 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2972 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2973 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2974 return JVMTI_ERROR_NONE;
2975 } /* end GetMethodDeclaringClass */
2976
2977
2978 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2979 // modifiers_ptr - pre-checked for NULL
2980 jvmtiError
2981 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2982 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2983 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2984 return JVMTI_ERROR_NONE;
2985 } /* end GetMethodModifiers */
2986
2987
2988 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2989 // max_ptr - pre-checked for NULL
2990 jvmtiError
2991 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2992 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2993 // get max stack
2994 (*max_ptr) = method_oop->max_locals();
2995 return JVMTI_ERROR_NONE;
2996 } /* end GetMaxLocals */
2997
2998
2999 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3000 // size_ptr - pre-checked for NULL
3001 jvmtiError
3002 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3003 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3004 // get size of arguments
3005
3006 (*size_ptr) = method_oop->size_of_parameters();
3007 return JVMTI_ERROR_NONE;
3008 } /* end GetArgumentsSize */
3009
3010
3011 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3012 // entry_count_ptr - pre-checked for NULL
3013 // table_ptr - pre-checked for NULL
3014 jvmtiError
3015 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3016 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3017 if (!method_oop->has_linenumber_table()) {
3018 return (JVMTI_ERROR_ABSENT_INFORMATION);
3019 }
3020
3021 // The line number table is compressed so we don't know how big it is until decompressed.
3022 // Decompression is really fast so we just do it twice.
3023
3024 // Compute size of table
3025 jint num_entries = 0;
3026 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3027 while (stream.read_pair()) {
3028 num_entries++;
3029 }
3030 jvmtiLineNumberEntry *jvmti_table =
3031 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3032
3033 // Fill jvmti table
3034 if (num_entries > 0) {
3035 int index = 0;
3036 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3037 while (stream.read_pair()) {
3038 jvmti_table[index].start_location = (jlocation) stream.bci();
3039 jvmti_table[index].line_number = (jint) stream.line();
3040 index++;
3041 }
3042 assert(index == num_entries, "sanity check");
3043 }
3044
3045 // Set up results
3046 (*entry_count_ptr) = num_entries;
3047 (*table_ptr) = jvmti_table;
3048
3049 return JVMTI_ERROR_NONE;
3050 } /* end GetLineNumberTable */
3051
3052
3053 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3054 // start_location_ptr - pre-checked for NULL
3055 // end_location_ptr - pre-checked for NULL
3056 jvmtiError
3057 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3058
3059 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3060 // get start and end location
3061 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3062 if (method_oop->code_size() == 0) {
3063 // there is no code so there is no start location
3064 (*start_location_ptr) = (jlocation)(-1);
3065 } else {
3066 (*start_location_ptr) = (jlocation)(0);
3067 }
3068
3069 return JVMTI_ERROR_NONE;
3070 } /* end GetMethodLocation */
3071
3072
3073 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3074 // entry_count_ptr - pre-checked for NULL
3075 // table_ptr - pre-checked for NULL
3076 jvmtiError
3077 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3078
3079 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3080 JavaThread* current_thread = JavaThread::current();
3081
3082 // does the klass have any local variable information?
3083 InstanceKlass* ik = method_oop->method_holder();
3084 if (!ik->access_flags().has_localvariable_table()) {
3085 return (JVMTI_ERROR_ABSENT_INFORMATION);
3086 }
3087
3088 ConstantPool* constants = method_oop->constants();
3089 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3090
3091 // in the vm localvariable table representation, 6 consecutive elements in the table
3092 // represent a 6-tuple of shorts
3093 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3094 jint num_entries = method_oop->localvariable_table_length();
3095 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3096 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3097
3098 if (num_entries > 0) {
3099 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3100 for (int i = 0; i < num_entries; i++) {
3101 // get the 5 tuple information from the vm table
3102 jlocation start_location = (jlocation) table[i].start_bci;
3103 jint length = (jint) table[i].length;
3104 int name_index = (int) table[i].name_cp_index;
3105 int signature_index = (int) table[i].descriptor_cp_index;
3106 int generic_signature_index = (int) table[i].signature_cp_index;
3107 jint slot = (jint) table[i].slot;
3108
3109 // get utf8 name and signature
3110 char *name_buf = NULL;
3111 char *sig_buf = NULL;
3112 char *gen_sig_buf = NULL;
3113 {
3114 ResourceMark rm(current_thread);
3115
3116 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3117 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3118 strcpy(name_buf, utf8_name);
3119
3120 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3121 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3122 strcpy(sig_buf, utf8_signature);
3123
3124 if (generic_signature_index > 0) {
3125 const char *utf8_gen_sign = (const char *)
3126 constants->symbol_at(generic_signature_index)->as_utf8();
3127 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3128 strcpy(gen_sig_buf, utf8_gen_sign);
3129 }
3130 }
3131
3132 // fill in the jvmti local variable table
3133 jvmti_table[i].start_location = start_location;
3134 jvmti_table[i].length = length;
3135 jvmti_table[i].name = name_buf;
3136 jvmti_table[i].signature = sig_buf;
3137 jvmti_table[i].generic_signature = gen_sig_buf;
3138 jvmti_table[i].slot = slot;
3139 }
3140 }
3141
3142 // set results
3143 (*entry_count_ptr) = num_entries;
3144 (*table_ptr) = jvmti_table;
3145
3146 return JVMTI_ERROR_NONE;
3147 } /* end GetLocalVariableTable */
3148
3149
3150 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3151 // bytecode_count_ptr - pre-checked for NULL
3152 // bytecodes_ptr - pre-checked for NULL
3153 jvmtiError
3154 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3155 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3156
3157 HandleMark hm;
3158 methodHandle method(method_oop);
3159 jint size = (jint)method->code_size();
3160 jvmtiError err = allocate(size, bytecodes_ptr);
3161 if (err != JVMTI_ERROR_NONE) {
3162 return err;
3163 }
3164
3165 (*bytecode_count_ptr) = size;
3166 // get byte codes
3167 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3168
3169 return JVMTI_ERROR_NONE;
3170 } /* end GetBytecodes */
3171
3172
3173 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3174 // is_native_ptr - pre-checked for NULL
3175 jvmtiError
3176 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3177 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3178 (*is_native_ptr) = method_oop->is_native();
3179 return JVMTI_ERROR_NONE;
3180 } /* end IsMethodNative */
3181
3182
3183 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3184 // is_synthetic_ptr - pre-checked for NULL
3185 jvmtiError
3186 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3187 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3188 (*is_synthetic_ptr) = method_oop->is_synthetic();
3189 return JVMTI_ERROR_NONE;
3190 } /* end IsMethodSynthetic */
3191
3192
3193 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3194 // is_obsolete_ptr - pre-checked for NULL
3195 jvmtiError
3196 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3197 if (use_version_1_0_semantics() &&
3198 get_capabilities()->can_redefine_classes == 0) {
3199 // This JvmtiEnv requested version 1.0 semantics and this function
3200 // requires the can_redefine_classes capability in version 1.0 so
3201 // we need to return an error here.
3202 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3203 }
3204
3205 if (method_oop == NULL || method_oop->is_obsolete()) {
3206 *is_obsolete_ptr = true;
3207 } else {
3208 *is_obsolete_ptr = false;
3209 }
3210 return JVMTI_ERROR_NONE;
3211 } /* end IsMethodObsolete */
3212
3213 //
3214 // Raw Monitor functions
3215 //
3216
3217 // name - pre-checked for NULL
3218 // monitor_ptr - pre-checked for NULL
3219 jvmtiError
3220 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3221 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3222 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3223
3224 *monitor_ptr = (jrawMonitorID)rmonitor;
3225
3226 return JVMTI_ERROR_NONE;
3227 } /* end CreateRawMonitor */
3228
3229
3230 // rmonitor - pre-checked for validity
3231 jvmtiError
3232 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3233 if (Threads::number_of_threads() == 0) {
3234 // Remove this monitor from pending raw monitors list
3235 // if it has entered in onload or start phase.
3236 JvmtiPendingMonitors::destroy(rmonitor);
3237 } else {
3238 Thread* thread = Thread::current();
3239 if (rmonitor->owner() == thread) {
3240 // The caller owns this monitor which we are about to destroy.
3241 // We exit the underlying synchronization object so that the
3242 // "delete monitor" call below can work without an assertion
3243 // failure on systems that don't like destroying synchronization
3244 // objects that are locked.
3245 int r;
3246 int recursion = rmonitor->recursions();
3247 for (int i = 0; i <= recursion; i++) {
3248 r = rmonitor->raw_exit(thread);
3249 assert(r == JvmtiRawMonitor::M_OK, "raw_exit should have worked");
3250 if (r != JvmtiRawMonitor::M_OK) { // robustness
3251 return JVMTI_ERROR_INTERNAL;
3252 }
3253 }
3254 }
3255 if (rmonitor->owner() != NULL) {
3256 // The caller is trying to destroy a monitor that is locked by
3257 // someone else. While this is not forbidden by the JVMTI
3258 // spec, it will cause an assertion failure on systems that don't
3259 // like destroying synchronization objects that are locked.
3260 // We indicate a problem with the error return (and leak the
3261 // monitor's memory).
3262 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3263 }
3264 }
3265
3266 delete rmonitor;
3267
3268 return JVMTI_ERROR_NONE;
3269 } /* end DestroyRawMonitor */
3270
3271
3272 // rmonitor - pre-checked for validity
3273 jvmtiError
3274 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3275 if (Threads::number_of_threads() == 0) {
3276 // No JavaThreads exist so JvmtiRawMonitor enter cannot be
3277 // used, add this raw monitor to the pending list.
3278 // The pending monitors will be actually entered when
3279 // the VM is setup.
3280 // See transition_pending_raw_monitors in create_vm()
3281 // in thread.cpp.
3282 JvmtiPendingMonitors::enter(rmonitor);
3283 } else {
3284 Thread* thread = Thread::current();
3285 if (thread->is_Java_thread()) {
3286 JavaThread* current_thread = (JavaThread*)thread;
3287
3288 /* Transition to thread_blocked without entering vm state */
3289 /* This is really evil. Normally you can't undo _thread_blocked */
3290 /* transitions like this because it would cause us to miss a */
3291 /* safepoint but since the thread was already in _thread_in_native */
3292 /* the thread is not leaving a safepoint safe state and it will */
3293 /* block when it tries to return from native. We can't safepoint */
3294 /* block in here because we could deadlock the vmthread. Blech. */
3295
3296 JavaThreadState state = current_thread->thread_state();
3297 assert(state == _thread_in_native, "Must be _thread_in_native");
3298 // frame should already be walkable since we are in native
3299 assert(!current_thread->has_last_Java_frame() ||
3300 current_thread->frame_anchor()->walkable(), "Must be walkable");
3301 current_thread->set_thread_state(_thread_blocked);
3302
3303 rmonitor->raw_enter(current_thread);
3304 // restore state, still at a safepoint safe state
3305 current_thread->set_thread_state(state);
3306 } else {
3307 rmonitor->raw_enter(thread);
3308 }
3309 }
3310 return JVMTI_ERROR_NONE;
3311 } /* end RawMonitorEnter */
3312
3313
3314 // rmonitor - pre-checked for validity
3315 jvmtiError
3316 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3317 jvmtiError err = JVMTI_ERROR_NONE;
3318
3319 if (Threads::number_of_threads() == 0) {
3320 // No JavaThreads exist so just remove this monitor from the pending list.
3321 // Bool value from exit is false if rmonitor is not in the list.
3322 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3323 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3324 }
3325 } else {
3326 Thread* thread = Thread::current();
3327 int r = rmonitor->raw_exit(thread);
3328 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3329 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3330 }
3331 }
3332 return err;
3333 } /* end RawMonitorExit */
3334
3335
3336 // rmonitor - pre-checked for validity
3337 jvmtiError
3338 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3339 int r = 0;
3340 Thread* thread = Thread::current();
3341
3342 if (thread->is_Java_thread()) {
3343 JavaThread* current_thread = (JavaThread*)thread;
3344
3345 /* Transition to thread_blocked without entering vm state */
3346 /* This is really evil. Normally you can't undo _thread_blocked */
3347 /* transitions like this because it would cause us to miss a */
3348 /* safepoint but since the thread was already in _thread_in_native */
3349 /* the thread is not leaving a safepoint safe state and it will */
3350 /* block when it tries to return from native. We can't safepoint */
3351 /* block in here because we could deadlock the vmthread. Blech. */
3352
3353 JavaThreadState state = current_thread->thread_state();
3354 assert(state == _thread_in_native, "Must be _thread_in_native");
3355 // frame should already be walkable since we are in native
3356 assert(!current_thread->has_last_Java_frame() ||
3357 current_thread->frame_anchor()->walkable(), "Must be walkable");
3358 current_thread->set_thread_state(_thread_blocked);
3359
3360 r = rmonitor->raw_wait(millis, true, current_thread);
3361 // restore state, still at a safepoint safe state
3362 current_thread->set_thread_state(state);
3363
3364 } else {
3365 r = rmonitor->raw_wait(millis, false, thread);
3366 assert(r != JvmtiRawMonitor::M_INTERRUPTED, "non-JavaThread can't be interrupted");
3367 }
3368
3369 switch (r) {
3370 case JvmtiRawMonitor::M_INTERRUPTED:
3371 return JVMTI_ERROR_INTERRUPT;
3372 case JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE:
3373 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3374 default:
3375 return JVMTI_ERROR_NONE;
3376 }
3377 } /* end RawMonitorWait */
3378
3379
3380 // rmonitor - pre-checked for validity
3381 jvmtiError
3382 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3383 Thread* thread = Thread::current();
3384 int r = rmonitor->raw_notify(thread);
3385
3386 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3387 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3388 }
3389 return JVMTI_ERROR_NONE;
3390 } /* end RawMonitorNotify */
3391
3392
3393 // rmonitor - pre-checked for validity
3394 jvmtiError
3395 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3396 Thread* thread = Thread::current();
3397 int r = rmonitor->raw_notifyAll(thread);
3398
3399 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) {
3400 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3401 }
3402 return JVMTI_ERROR_NONE;
3403 } /* end RawMonitorNotifyAll */
3404
3405
3406 //
3407 // JNI Function Interception functions
3408 //
3409
3410
3411 // function_table - pre-checked for NULL
3412 jvmtiError
3413 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3414 // Copy jni function table at safepoint.
3415 VM_JNIFunctionTableCopier copier(function_table);
3416 VMThread::execute(&copier);
3417
3418 return JVMTI_ERROR_NONE;
3419 } /* end SetJNIFunctionTable */
3420
3421
3422 // function_table - pre-checked for NULL
3423 jvmtiError
3424 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3425 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3426 if (*function_table == NULL)
3427 return JVMTI_ERROR_OUT_OF_MEMORY;
3428 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3429 return JVMTI_ERROR_NONE;
3430 } /* end GetJNIFunctionTable */
3431
3432
3433 //
3434 // Event Management functions
3435 //
3436
3437 jvmtiError
3438 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3439 // can only generate two event types
3440 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3441 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3442 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3443 }
3444
3445 // for compiled_method_load events we must check that the environment
3446 // has the can_generate_compiled_method_load_events capability.
3447 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3448 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3449 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3450 }
3451 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3452 } else {
3453 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3454 }
3455
3456 } /* end GenerateEvents */
3457
3458
3459 //
3460 // Extension Mechanism functions
3461 //
3462
3463 // extension_count_ptr - pre-checked for NULL
3464 // extensions - pre-checked for NULL
3465 jvmtiError
3466 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3467 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3468 } /* end GetExtensionFunctions */
3469
3470
3471 // extension_count_ptr - pre-checked for NULL
3472 // extensions - pre-checked for NULL
3473 jvmtiError
3474 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3475 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3476 } /* end GetExtensionEvents */
3477
3478
3479 // callback - NULL is a valid value, must be checked
3480 jvmtiError
3481 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3482 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3483 } /* end SetExtensionEventCallback */
3484
3485 //
3486 // Timers functions
3487 //
3488
3489 // info_ptr - pre-checked for NULL
3490 jvmtiError
3491 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3492 os::current_thread_cpu_time_info(info_ptr);
3493 return JVMTI_ERROR_NONE;
3494 } /* end GetCurrentThreadCpuTimerInfo */
3495
3496
3497 // nanos_ptr - pre-checked for NULL
3498 jvmtiError
3499 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3500 *nanos_ptr = os::current_thread_cpu_time();
3501 return JVMTI_ERROR_NONE;
3502 } /* end GetCurrentThreadCpuTime */
3503
3504
3505 // info_ptr - pre-checked for NULL
3506 jvmtiError
3507 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3508 os::thread_cpu_time_info(info_ptr);
3509 return JVMTI_ERROR_NONE;
3510 } /* end GetThreadCpuTimerInfo */
3511
3512
3513 // Threads_lock NOT held, java_thread not protected by lock
3514 // java_thread - pre-checked
3515 // nanos_ptr - pre-checked for NULL
3516 jvmtiError
3517 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3518 *nanos_ptr = os::thread_cpu_time(java_thread);
3519 return JVMTI_ERROR_NONE;
3520 } /* end GetThreadCpuTime */
3521
3522
3523 // info_ptr - pre-checked for NULL
3524 jvmtiError
3525 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3526 os::javaTimeNanos_info(info_ptr);
3527 return JVMTI_ERROR_NONE;
3528 } /* end GetTimerInfo */
3529
3530
3531 // nanos_ptr - pre-checked for NULL
3532 jvmtiError
3533 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3534 *nanos_ptr = os::javaTimeNanos();
3535 return JVMTI_ERROR_NONE;
3536 } /* end GetTime */
3537
3538
3539 // processor_count_ptr - pre-checked for NULL
3540 jvmtiError
3541 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3542 *processor_count_ptr = os::active_processor_count();
3543 return JVMTI_ERROR_NONE;
3544 } /* end GetAvailableProcessors */
3545
3546 jvmtiError
3547 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3548 if (sampling_interval < 0) {
3549 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3550 }
3551 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3552 return JVMTI_ERROR_NONE;
3553 } /* end SetHeapSamplingInterval */
3554
3555 //
3556 // System Properties functions
3557 //
3558
3559 // count_ptr - pre-checked for NULL
3560 // property_ptr - pre-checked for NULL
3561 jvmtiError
3562 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3563 jvmtiError err = JVMTI_ERROR_NONE;
3564
3565 // Get the number of readable properties.
3566 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3567
3568 // Allocate memory to hold the exact number of readable properties.
3569 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3570 if (err != JVMTI_ERROR_NONE) {
3571 return err;
3572 }
3573 int readable_count = 0;
3574 // Loop through the system properties until all the readable properties are found.
3575 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3576 if (p->is_readable()) {
3577 const char *key = p->key();
3578 char **tmp_value = *property_ptr+readable_count;
3579 readable_count++;
3580 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3581 if (err == JVMTI_ERROR_NONE) {
3582 strcpy(*tmp_value, key);
3583 } else {
3584 // clean up previously allocated memory.
3585 for (int j = 0; j < readable_count; j++) {
3586 Deallocate((unsigned char*)*property_ptr+j);
3587 }
3588 Deallocate((unsigned char*)property_ptr);
3589 break;
3590 }
3591 }
3592 }
3593 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3594 return err;
3595 } /* end GetSystemProperties */
3596
3597
3598 // property - pre-checked for NULL
3599 // value_ptr - pre-checked for NULL
3600 jvmtiError
3601 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3602 jvmtiError err = JVMTI_ERROR_NONE;
3603 const char *value;
3604
3605 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3606 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3607 if (value == NULL) {
3608 err = JVMTI_ERROR_NOT_AVAILABLE;
3609 } else {
3610 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3611 if (err == JVMTI_ERROR_NONE) {
3612 strcpy(*value_ptr, value);
3613 }
3614 }
3615 return err;
3616 } /* end GetSystemProperty */
3617
3618
3619 // property - pre-checked for NULL
3620 // value - NULL is a valid value, must be checked
3621 jvmtiError
3622 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3623 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3624
3625 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3626 if (strcmp(property, p->key()) == 0) {
3627 if (p->set_writeable_value(value_ptr)) {
3628 err = JVMTI_ERROR_NONE;
3629 }
3630 }
3631 }
3632 return err;
3633 } /* end SetSystemProperty */