1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/modules.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "interpreter/bytecodeStream.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvmtifiles/jvmtiEnv.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jniCheck.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "prims/jvmtiAgentThread.hpp"
45 #include "prims/jvmtiClassFileReconstituter.hpp"
46 #include "prims/jvmtiCodeBlobEvents.hpp"
47 #include "prims/jvmtiExtensions.hpp"
48 #include "prims/jvmtiGetLoadedClasses.hpp"
49 #include "prims/jvmtiImpl.hpp"
50 #include "prims/jvmtiManageCapabilities.hpp"
51 #include "prims/jvmtiRawMonitor.hpp"
52 #include "prims/jvmtiRedefineClasses.hpp"
53 #include "prims/jvmtiTagMap.hpp"
54 #include "prims/jvmtiThreadState.inline.hpp"
55 #include "prims/jvmtiUtil.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/fieldDescriptor.inline.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jfieldIDWorkaround.hpp"
62 #include "runtime/jniHandles.inline.hpp"
63 #include "runtime/objectMonitor.inline.hpp"
64 #include "runtime/osThread.hpp"
65 #include "runtime/reflectionUtils.hpp"
66 #include "runtime/signature.hpp"
67 #include "runtime/thread.inline.hpp"
68 #include "runtime/threadHeapSampler.hpp"
69 #include "runtime/threadSMR.hpp"
70 #include "runtime/timerTrace.hpp"
71 #include "runtime/vframe.inline.hpp"
72 #include "runtime/vmThread.hpp"
73 #include "services/threadService.hpp"
74 #include "utilities/exceptions.hpp"
75 #include "utilities/preserveException.hpp"
76
77
78 #define FIXLATER 0 // REMOVE this when completed.
79
80 // FIXLATER: hook into JvmtiTrace
81 #define TraceJVMTICalls false
82
83 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
84 }
85
86 JvmtiEnv::~JvmtiEnv() {
87 }
88
89 JvmtiEnv*
90 JvmtiEnv::create_a_jvmti(jint version) {
91 return new JvmtiEnv(version);
92 }
93
94 // VM operation class to copy jni function table at safepoint.
95 // More than one java threads or jvmti agents may be reading/
96 // modifying jni function tables. To reduce the risk of bad
97 // interaction b/w these threads it is copied at safepoint.
98 class VM_JNIFunctionTableCopier : public VM_Operation {
99 private:
100 const struct JNINativeInterface_ *_function_table;
101 public:
102 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
103 _function_table = func_tbl;
104 };
105
106 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
107 void doit() {
108 copy_jni_function_table(_function_table);
109 };
110 };
111
112 //
113 // Do not change the "prefix" marker below, everything above it is copied
114 // unchanged into the filled stub, everything below is controlled by the
115 // stub filler (only method bodies are carried forward, and then only for
116 // functionality still in the spec).
117 //
118 // end file prefix
119
120 //
121 // Memory Management functions
122 //
123
124 // mem_ptr - pre-checked for NULL
125 jvmtiError
126 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
127 return allocate(size, mem_ptr);
128 } /* end Allocate */
129
130
131 // mem - NULL is a valid value, must be checked
132 jvmtiError
133 JvmtiEnv::Deallocate(unsigned char* mem) {
134 return deallocate(mem);
135 } /* end Deallocate */
136
137 // Threads_lock NOT held, java_thread not protected by lock
138 // java_thread - pre-checked
139 // data - NULL is a valid value, must be checked
140 jvmtiError
141 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
142 JvmtiThreadState* state = java_thread->jvmti_thread_state();
143 if (state == NULL) {
144 if (data == NULL) {
145 // leaving state unset same as data set to NULL
146 return JVMTI_ERROR_NONE;
147 }
148 // otherwise, create the state
149 state = JvmtiThreadState::state_for(java_thread);
150 if (state == NULL) {
151 return JVMTI_ERROR_THREAD_NOT_ALIVE;
152 }
153 }
154 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
155 return JVMTI_ERROR_NONE;
156 } /* end SetThreadLocalStorage */
157
158
159 // Threads_lock NOT held
160 // thread - NOT pre-checked
161 // data_ptr - pre-checked for NULL
162 jvmtiError
163 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
164 JavaThread* current_thread = JavaThread::current();
165 if (thread == NULL) {
166 JvmtiThreadState* state = current_thread->jvmti_thread_state();
167 *data_ptr = (state == NULL) ? NULL :
168 state->env_thread_state(this)->get_agent_thread_local_storage_data();
169 } else {
170 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
171 // the thread to _thread_in_vm. However, when the TLS for a thread
172 // other than the current thread is required we need to transition
173 // from native so as to resolve the jthread.
174
175 ThreadInVMfromNative __tiv(current_thread);
176 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
177 debug_only(VMNativeEntryWrapper __vew;)
178
179 JavaThread* java_thread = NULL;
180 ThreadsListHandle tlh(current_thread);
181 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
182 if (err != JVMTI_ERROR_NONE) {
183 return err;
184 }
185
186 JvmtiThreadState* state = java_thread->jvmti_thread_state();
187 *data_ptr = (state == NULL) ? NULL :
188 state->env_thread_state(this)->get_agent_thread_local_storage_data();
189 }
190 return JVMTI_ERROR_NONE;
191 } /* end GetThreadLocalStorage */
192
193 //
194 // Module functions
195 //
196
197 // module_count_ptr - pre-checked for NULL
198 // modules_ptr - pre-checked for NULL
199 jvmtiError
200 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
201 JvmtiModuleClosure jmc;
202
203 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
204 } /* end GetAllModules */
205
206
207 // class_loader - NULL is a valid value, must be pre-checked
208 // package_name - pre-checked for NULL
209 // module_ptr - pre-checked for NULL
210 jvmtiError
211 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
212 JavaThread* THREAD = JavaThread::current(); // pass to macros
213 ResourceMark rm(THREAD);
214
215 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
216 // Check that loader is a subclass of java.lang.ClassLoader.
217 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
218 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
219 }
220 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
221 if (HAS_PENDING_EXCEPTION) {
222 CLEAR_PENDING_EXCEPTION;
223 return JVMTI_ERROR_INTERNAL; // unexpected exception
224 }
225 *module_ptr = module;
226 return JVMTI_ERROR_NONE;
227 } /* end GetNamedModule */
228
229
230 // module - pre-checked for NULL
231 // to_module - pre-checked for NULL
232 jvmtiError
233 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
234 JavaThread* THREAD = JavaThread::current();
235
236 // check module
237 Handle h_module(THREAD, JNIHandles::resolve(module));
238 if (!java_lang_Module::is_instance(h_module())) {
239 return JVMTI_ERROR_INVALID_MODULE;
240 }
241 // check to_module
242 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
243 if (!java_lang_Module::is_instance(h_to_module())) {
244 return JVMTI_ERROR_INVALID_MODULE;
245 }
246 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
247 } /* end AddModuleReads */
248
249
250 // module - pre-checked for NULL
251 // pkg_name - pre-checked for NULL
252 // to_module - pre-checked for NULL
253 jvmtiError
254 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
255 JavaThread* THREAD = JavaThread::current();
256 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
257
258 // check module
259 Handle h_module(THREAD, JNIHandles::resolve(module));
260 if (!java_lang_Module::is_instance(h_module())) {
261 return JVMTI_ERROR_INVALID_MODULE;
262 }
263 // check to_module
264 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
265 if (!java_lang_Module::is_instance(h_to_module())) {
266 return JVMTI_ERROR_INVALID_MODULE;
267 }
268 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
269 } /* end AddModuleExports */
270
271
272 // module - pre-checked for NULL
273 // pkg_name - pre-checked for NULL
274 // to_module - pre-checked for NULL
275 jvmtiError
276 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
277 JavaThread* THREAD = JavaThread::current();
278 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
279
280 // check module
281 Handle h_module(THREAD, JNIHandles::resolve(module));
282 if (!java_lang_Module::is_instance(h_module())) {
283 return JVMTI_ERROR_INVALID_MODULE;
284 }
285 // check to_module
286 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
287 if (!java_lang_Module::is_instance(h_to_module())) {
288 return JVMTI_ERROR_INVALID_MODULE;
289 }
290 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
291 } /* end AddModuleOpens */
292
293
294 // module - pre-checked for NULL
295 // service - pre-checked for NULL
296 jvmtiError
297 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
298 JavaThread* THREAD = JavaThread::current();
299
300 // check module
301 Handle h_module(THREAD, JNIHandles::resolve(module));
302 if (!java_lang_Module::is_instance(h_module())) {
303 return JVMTI_ERROR_INVALID_MODULE;
304 }
305 // check service
306 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
307 if (!java_lang_Class::is_instance(h_service()) ||
308 java_lang_Class::is_primitive(h_service())) {
309 return JVMTI_ERROR_INVALID_CLASS;
310 }
311 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
312 } /* end AddModuleUses */
313
314
315 // module - pre-checked for NULL
316 // service - pre-checked for NULL
317 // impl_class - pre-checked for NULL
318 jvmtiError
319 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
320 JavaThread* THREAD = JavaThread::current();
321
322 // check module
323 Handle h_module(THREAD, JNIHandles::resolve(module));
324 if (!java_lang_Module::is_instance(h_module())) {
325 return JVMTI_ERROR_INVALID_MODULE;
326 }
327 // check service
328 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
329 if (!java_lang_Class::is_instance(h_service()) ||
330 java_lang_Class::is_primitive(h_service())) {
331 return JVMTI_ERROR_INVALID_CLASS;
332 }
333 // check impl_class
334 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
335 if (!java_lang_Class::is_instance(h_impl_class()) ||
336 java_lang_Class::is_primitive(h_impl_class())) {
337 return JVMTI_ERROR_INVALID_CLASS;
338 }
339 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
340 } /* end AddModuleProvides */
341
342 // module - pre-checked for NULL
343 // is_modifiable_class_ptr - pre-checked for NULL
344 jvmtiError
345 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
346 JavaThread* THREAD = JavaThread::current();
347
348 // check module
349 Handle h_module(THREAD, JNIHandles::resolve(module));
350 if (!java_lang_Module::is_instance(h_module())) {
351 return JVMTI_ERROR_INVALID_MODULE;
352 }
353
354 *is_modifiable_module_ptr = JNI_TRUE;
355 return JVMTI_ERROR_NONE;
356 } /* end IsModifiableModule */
357
358
359 //
360 // Class functions
361 //
362
363 // class_count_ptr - pre-checked for NULL
364 // classes_ptr - pre-checked for NULL
365 jvmtiError
366 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
367 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
368 } /* end GetLoadedClasses */
369
370
371 // initiating_loader - NULL is a valid value, must be checked
372 // class_count_ptr - pre-checked for NULL
373 // classes_ptr - pre-checked for NULL
374 jvmtiError
375 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
376 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
377 class_count_ptr, classes_ptr);
378 } /* end GetClassLoaderClasses */
379
380 // k_mirror - may be primitive, this must be checked
381 // is_modifiable_class_ptr - pre-checked for NULL
382 jvmtiError
383 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
384 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
385 JNI_TRUE : JNI_FALSE;
386 return JVMTI_ERROR_NONE;
387 } /* end IsModifiableClass */
388
389 // class_count - pre-checked to be greater than or equal to 0
390 // classes - pre-checked for NULL
391 jvmtiError
392 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
393 //TODO: add locking
394
395 int index;
396 JavaThread* current_thread = JavaThread::current();
397 ResourceMark rm(current_thread);
398
399 jvmtiClassDefinition* class_definitions =
400 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
401 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
402
403 for (index = 0; index < class_count; index++) {
404 HandleMark hm(current_thread);
405
406 jclass jcls = classes[index];
407 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
408 if (k_mirror == NULL) {
409 return JVMTI_ERROR_INVALID_CLASS;
410 }
411 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
412 return JVMTI_ERROR_INVALID_CLASS;
413 }
414
415 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
416 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
417 }
418
419 Klass* klass = java_lang_Class::as_Klass(k_mirror);
420
421 jint status = klass->jvmti_class_status();
422 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
423 return JVMTI_ERROR_INVALID_CLASS;
424 }
425
426 InstanceKlass* ik = InstanceKlass::cast(klass);
427 if (ik->get_cached_class_file_bytes() == NULL) {
428 // Not cached, we need to reconstitute the class file from the
429 // VM representation. We don't attach the reconstituted class
430 // bytes to the InstanceKlass here because they have not been
431 // validated and we're not at a safepoint.
432 JvmtiClassFileReconstituter reconstituter(ik);
433 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
434 return reconstituter.get_error();
435 }
436
437 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
438 class_definitions[index].class_bytes = (unsigned char*)
439 reconstituter.class_file_bytes();
440 } else {
441 // it is cached, get it from the cache
442 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
443 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
444 }
445 class_definitions[index].klass = jcls;
446 }
447 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
448 VMThread::execute(&op);
449 return (op.check_error());
450 } /* end RetransformClasses */
451
452
453 // class_count - pre-checked to be greater than or equal to 0
454 // class_definitions - pre-checked for NULL
455 jvmtiError
456 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
457 //TODO: add locking
458 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
459 VMThread::execute(&op);
460 return (op.check_error());
461 } /* end RedefineClasses */
462
463
464 //
465 // Object functions
466 //
467
468 // size_ptr - pre-checked for NULL
469 jvmtiError
470 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
471 oop mirror = JNIHandles::resolve_external_guard(object);
472 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
473 size_t obj_size = mirror->size();
474 *size_ptr = (jlong)Universe::heap()->cell_size(obj_size) * wordSize;
475 return JVMTI_ERROR_NONE;
476 } /* end GetObjectSize */
477
478 //
479 // Method functions
480 //
481
482 // prefix - NULL is a valid value, must be checked
483 jvmtiError
484 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
485 return prefix == NULL?
486 SetNativeMethodPrefixes(0, NULL) :
487 SetNativeMethodPrefixes(1, (char**)&prefix);
488 } /* end SetNativeMethodPrefix */
489
490
491 // prefix_count - pre-checked to be greater than or equal to 0
492 // prefixes - pre-checked for NULL
493 jvmtiError
494 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
495 // Have to grab JVMTI thread state lock to be sure that some thread
496 // isn't accessing the prefixes at the same time we are setting them.
497 // No locks during VM bring-up.
498 if (Threads::number_of_threads() == 0) {
499 return set_native_method_prefixes(prefix_count, prefixes);
500 } else {
501 MutexLocker mu(JvmtiThreadState_lock);
502 return set_native_method_prefixes(prefix_count, prefixes);
503 }
504 } /* end SetNativeMethodPrefixes */
505
506 //
507 // Event Management functions
508 //
509
510 // callbacks - NULL is a valid value, must be checked
511 // size_of_callbacks - pre-checked to be greater than or equal to 0
512 jvmtiError
513 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
514 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
515 return JVMTI_ERROR_NONE;
516 } /* end SetEventCallbacks */
517
518
519 // event_thread - NULL is a valid value, must be checked
520 jvmtiError
521 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
522 if (event_thread == NULL) {
523 // Can be called at Agent_OnLoad() time with event_thread == NULL
524 // when Thread::current() does not work yet so we cannot create a
525 // ThreadsListHandle that is common to both thread-specific and
526 // global code paths.
527
528 // event_type must be valid
529 if (!JvmtiEventController::is_valid_event_type(event_type)) {
530 return JVMTI_ERROR_INVALID_EVENT_TYPE;
531 }
532
533 bool enabled = (mode == JVMTI_ENABLE);
534
535 // assure that needed capabilities are present
536 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
537 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
538 }
539
540 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
541 record_class_file_load_hook_enabled();
542 }
543
544 if (event_type == JVMTI_EVENT_SAMPLED_OBJECT_ALLOC) {
545 if (enabled) {
546 ThreadHeapSampler::enable();
547 } else {
548 ThreadHeapSampler::disable();
549 }
550 }
551 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
552 } else {
553 // We have a specified event_thread.
554 JavaThread* java_thread = NULL;
555 ThreadsListHandle tlh;
556 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
557 if (err != JVMTI_ERROR_NONE) {
558 return err;
559 }
560
561 // event_type must be valid
562 if (!JvmtiEventController::is_valid_event_type(event_type)) {
563 return JVMTI_ERROR_INVALID_EVENT_TYPE;
564 }
565
566 // global events cannot be controlled at thread level.
567 if (JvmtiEventController::is_global_event(event_type)) {
568 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
569 }
570
571 bool enabled = (mode == JVMTI_ENABLE);
572
573 // assure that needed capabilities are present
574 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
575 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
576 }
577
578 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
579 record_class_file_load_hook_enabled();
580 }
581 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
582 }
583
584 return JVMTI_ERROR_NONE;
585 } /* end SetEventNotificationMode */
586
587 //
588 // Capability functions
589 //
590
591 // capabilities_ptr - pre-checked for NULL
592 jvmtiError
593 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
594 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
595 get_prohibited_capabilities(),
596 capabilities_ptr);
597 return JVMTI_ERROR_NONE;
598 } /* end GetPotentialCapabilities */
599
600
601 // capabilities_ptr - pre-checked for NULL
602 jvmtiError
603 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
604 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
605 get_prohibited_capabilities(),
606 capabilities_ptr,
607 get_capabilities());
608 } /* end AddCapabilities */
609
610
611 // capabilities_ptr - pre-checked for NULL
612 jvmtiError
613 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
614 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
615 return JVMTI_ERROR_NONE;
616 } /* end RelinquishCapabilities */
617
618
619 // capabilities_ptr - pre-checked for NULL
620 jvmtiError
621 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
622 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
623 return JVMTI_ERROR_NONE;
624 } /* end GetCapabilities */
625
626 //
627 // Class Loader Search functions
628 //
629
630 // segment - pre-checked for NULL
631 jvmtiError
632 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
633 jvmtiPhase phase = get_phase();
634 if (phase == JVMTI_PHASE_ONLOAD) {
635 Arguments::append_sysclasspath(segment);
636 return JVMTI_ERROR_NONE;
637 } else if (use_version_1_0_semantics()) {
638 // This JvmtiEnv requested version 1.0 semantics and this function
639 // is only allowed in the ONLOAD phase in version 1.0 so we need to
640 // return an error here.
641 return JVMTI_ERROR_WRONG_PHASE;
642 } else if (phase == JVMTI_PHASE_LIVE) {
643 // The phase is checked by the wrapper that called this function,
644 // but this thread could be racing with the thread that is
645 // terminating the VM so we check one more time.
646
647 // create the zip entry
648 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
649 if (zip_entry == NULL) {
650 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
651 }
652
653 // lock the loader
654 Thread* thread = Thread::current();
655 HandleMark hm;
656 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
657
658 ObjectLocker ol(loader_lock, thread);
659
660 // add the jar file to the bootclasspath
661 log_info(class, load)("opened: %s", zip_entry->name());
662 #if INCLUDE_CDS
663 ClassLoaderExt::append_boot_classpath(zip_entry);
664 #else
665 ClassLoader::add_to_boot_append_entries(zip_entry);
666 #endif
667 return JVMTI_ERROR_NONE;
668 } else {
669 return JVMTI_ERROR_WRONG_PHASE;
670 }
671
672 } /* end AddToBootstrapClassLoaderSearch */
673
674
675 // segment - pre-checked for NULL
676 jvmtiError
677 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
678 jvmtiPhase phase = get_phase();
679
680 if (phase == JVMTI_PHASE_ONLOAD) {
681 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
682 if (strcmp("java.class.path", p->key()) == 0) {
683 p->append_value(segment);
684 break;
685 }
686 }
687 return JVMTI_ERROR_NONE;
688 } else if (phase == JVMTI_PHASE_LIVE) {
689 // The phase is checked by the wrapper that called this function,
690 // but this thread could be racing with the thread that is
691 // terminating the VM so we check one more time.
692 HandleMark hm;
693
694 // create the zip entry (which will open the zip file and hence
695 // check that the segment is indeed a zip file).
696 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
697 if (zip_entry == NULL) {
698 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
699 }
700 delete zip_entry; // no longer needed
701
702 // lock the loader
703 Thread* THREAD = Thread::current();
704 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
705
706 ObjectLocker ol(loader, THREAD);
707
708 // need the path as java.lang.String
709 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
710 if (HAS_PENDING_EXCEPTION) {
711 CLEAR_PENDING_EXCEPTION;
712 return JVMTI_ERROR_INTERNAL;
713 }
714
715 // Invoke the appendToClassPathForInstrumentation method - if the method
716 // is not found it means the loader doesn't support adding to the class path
717 // in the live phase.
718 {
719 JavaValue res(T_VOID);
720 JavaCalls::call_special(&res,
721 loader,
722 loader->klass(),
723 vmSymbols::appendToClassPathForInstrumentation_name(),
724 vmSymbols::appendToClassPathForInstrumentation_signature(),
725 path,
726 THREAD);
727 if (HAS_PENDING_EXCEPTION) {
728 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
729 CLEAR_PENDING_EXCEPTION;
730
731 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
732 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
733 } else {
734 return JVMTI_ERROR_INTERNAL;
735 }
736 }
737 }
738
739 return JVMTI_ERROR_NONE;
740 } else {
741 return JVMTI_ERROR_WRONG_PHASE;
742 }
743 } /* end AddToSystemClassLoaderSearch */
744
745 //
746 // General functions
747 //
748
749 // phase_ptr - pre-checked for NULL
750 jvmtiError
751 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
752 *phase_ptr = phase();
753 return JVMTI_ERROR_NONE;
754 } /* end GetPhase */
755
756
757 jvmtiError
758 JvmtiEnv::DisposeEnvironment() {
759 dispose();
760 return JVMTI_ERROR_NONE;
761 } /* end DisposeEnvironment */
762
763
764 // data - NULL is a valid value, must be checked
765 jvmtiError
766 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
767 set_env_local_storage(data);
768 return JVMTI_ERROR_NONE;
769 } /* end SetEnvironmentLocalStorage */
770
771
772 // data_ptr - pre-checked for NULL
773 jvmtiError
774 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
775 *data_ptr = (void*)get_env_local_storage();
776 return JVMTI_ERROR_NONE;
777 } /* end GetEnvironmentLocalStorage */
778
779 // version_ptr - pre-checked for NULL
780 jvmtiError
781 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
782 *version_ptr = JVMTI_VERSION;
783 return JVMTI_ERROR_NONE;
784 } /* end GetVersionNumber */
785
786
787 // name_ptr - pre-checked for NULL
788 jvmtiError
789 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
790 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
791 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
792 }
793 const char *name = JvmtiUtil::error_name(error);
794 if (name == NULL) {
795 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
796 }
797 size_t len = strlen(name) + 1;
798 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
799 if (err == JVMTI_ERROR_NONE) {
800 memcpy(*name_ptr, name, len);
801 }
802 return err;
803 } /* end GetErrorName */
804
805
806 jvmtiError
807 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
808 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
809 switch (flag) {
810 case JVMTI_VERBOSE_OTHER:
811 // ignore
812 break;
813 case JVMTI_VERBOSE_CLASS:
814 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
815 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
816 break;
817 case JVMTI_VERBOSE_GC:
818 if (value == 0) {
819 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
820 } else {
821 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
822 }
823 break;
824 case JVMTI_VERBOSE_JNI:
825 PrintJNIResolving = value != 0;
826 break;
827 default:
828 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
829 };
830 return JVMTI_ERROR_NONE;
831 } /* end SetVerboseFlag */
832
833
834 // format_ptr - pre-checked for NULL
835 jvmtiError
836 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
837 *format_ptr = JVMTI_JLOCATION_JVMBCI;
838 return JVMTI_ERROR_NONE;
839 } /* end GetJLocationFormat */
840
841 //
842 // Thread functions
843 //
844
845 // Threads_lock NOT held
846 // thread - NOT pre-checked
847 // thread_state_ptr - pre-checked for NULL
848 jvmtiError
849 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
850 JavaThread* current_thread = JavaThread::current();
851 JavaThread* java_thread = NULL;
852 oop thread_oop = NULL;
853 ThreadsListHandle tlh(current_thread);
854
855 if (thread == NULL) {
856 java_thread = current_thread;
857 thread_oop = java_thread->threadObj();
858
859 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
860 return JVMTI_ERROR_INVALID_THREAD;
861 }
862 } else {
863 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
864 if (err != JVMTI_ERROR_NONE) {
865 // We got an error code so we don't have a JavaThread *, but
866 // only return an error from here if we didn't get a valid
867 // thread_oop.
868 if (thread_oop == NULL) {
869 return err;
870 }
871 // We have a valid thread_oop so we can return some thread state.
872 }
873 }
874
875 // get most state bits
876 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
877
878 if (java_thread != NULL) {
879 // We have a JavaThread* so add more state bits.
880 JavaThreadState jts = java_thread->thread_state();
881
882 if (java_thread->is_being_ext_suspended()) {
883 state |= JVMTI_THREAD_STATE_SUSPENDED;
884 }
885 if (jts == _thread_in_native) {
886 state |= JVMTI_THREAD_STATE_IN_NATIVE;
887 }
888 OSThread* osThread = java_thread->osthread();
889 if (osThread != NULL && osThread->interrupted()) {
890 state |= JVMTI_THREAD_STATE_INTERRUPTED;
891 }
892 }
893
894 *thread_state_ptr = state;
895 return JVMTI_ERROR_NONE;
896 } /* end GetThreadState */
897
898
899 // thread_ptr - pre-checked for NULL
900 jvmtiError
901 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
902 JavaThread* current_thread = JavaThread::current();
903 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
904 return JVMTI_ERROR_NONE;
905 } /* end GetCurrentThread */
906
907
908 // threads_count_ptr - pre-checked for NULL
909 // threads_ptr - pre-checked for NULL
910 jvmtiError
911 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
912 int nthreads = 0;
913 Handle *thread_objs = NULL;
914 ResourceMark rm;
915 HandleMark hm;
916
917 // enumerate threads (including agent threads)
918 ThreadsListEnumerator tle(Thread::current(), true);
919 nthreads = tle.num_threads();
920 *threads_count_ptr = nthreads;
921
922 if (nthreads == 0) {
923 *threads_ptr = NULL;
924 return JVMTI_ERROR_NONE;
925 }
926
927 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
928 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
929
930 for (int i=0; i < nthreads; i++) {
931 thread_objs[i] = Handle(tle.get_threadObj(i));
932 }
933
934 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
935 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
936
937 *threads_ptr = jthreads;
938 return JVMTI_ERROR_NONE;
939 } /* end GetAllThreads */
940
941
942 // Threads_lock NOT held, java_thread not protected by lock
943 // java_thread - pre-checked
944 jvmtiError
945 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
946 // don't allow hidden thread suspend request.
947 if (java_thread->is_hidden_from_external_view()) {
948 return (JVMTI_ERROR_NONE);
949 }
950
951 {
952 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
953 if (java_thread->is_external_suspend()) {
954 // don't allow nested external suspend requests.
955 return (JVMTI_ERROR_THREAD_SUSPENDED);
956 }
957 if (java_thread->is_exiting()) { // thread is in the process of exiting
958 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
959 }
960 java_thread->set_external_suspend();
961 }
962
963 if (!JvmtiSuspendControl::suspend(java_thread)) {
964 // the thread was in the process of exiting
965 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
966 }
967 return JVMTI_ERROR_NONE;
968 } /* end SuspendThread */
969
970
971 // request_count - pre-checked to be greater than or equal to 0
972 // request_list - pre-checked for NULL
973 // results - pre-checked for NULL
974 jvmtiError
975 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
976 int needSafepoint = 0; // > 0 if we need a safepoint
977 ThreadsListHandle tlh;
978 for (int i = 0; i < request_count; i++) {
979 JavaThread *java_thread = NULL;
980 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
981 if (err != JVMTI_ERROR_NONE) {
982 results[i] = err;
983 continue;
984 }
985 // don't allow hidden thread suspend request.
986 if (java_thread->is_hidden_from_external_view()) {
987 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
988 continue;
989 }
990
991 {
992 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
993 if (java_thread->is_external_suspend()) {
994 // don't allow nested external suspend requests.
995 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
996 continue;
997 }
998 if (java_thread->is_exiting()) { // thread is in the process of exiting
999 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1000 continue;
1001 }
1002 java_thread->set_external_suspend();
1003 }
1004 if (java_thread->thread_state() == _thread_in_native) {
1005 // We need to try and suspend native threads here. Threads in
1006 // other states will self-suspend on their next transition.
1007 if (!JvmtiSuspendControl::suspend(java_thread)) {
1008 // The thread was in the process of exiting. Force another
1009 // safepoint to make sure that this thread transitions.
1010 needSafepoint++;
1011 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1012 continue;
1013 }
1014 } else {
1015 needSafepoint++;
1016 }
1017 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1018 }
1019 if (needSafepoint > 0) {
1020 VM_ThreadsSuspendJVMTI tsj;
1021 VMThread::execute(&tsj);
1022 }
1023 // per-thread suspend results returned via results parameter
1024 return JVMTI_ERROR_NONE;
1025 } /* end SuspendThreadList */
1026
1027
1028 // Threads_lock NOT held, java_thread not protected by lock
1029 // java_thread - pre-checked
1030 jvmtiError
1031 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1032 // don't allow hidden thread resume request.
1033 if (java_thread->is_hidden_from_external_view()) {
1034 return JVMTI_ERROR_NONE;
1035 }
1036
1037 if (!java_thread->is_being_ext_suspended()) {
1038 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1039 }
1040
1041 if (!JvmtiSuspendControl::resume(java_thread)) {
1042 return JVMTI_ERROR_INTERNAL;
1043 }
1044 return JVMTI_ERROR_NONE;
1045 } /* end ResumeThread */
1046
1047
1048 // request_count - pre-checked to be greater than or equal to 0
1049 // request_list - pre-checked for NULL
1050 // results - pre-checked for NULL
1051 jvmtiError
1052 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1053 ThreadsListHandle tlh;
1054 for (int i = 0; i < request_count; i++) {
1055 JavaThread* java_thread = NULL;
1056 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1057 if (err != JVMTI_ERROR_NONE) {
1058 results[i] = err;
1059 continue;
1060 }
1061 // don't allow hidden thread resume request.
1062 if (java_thread->is_hidden_from_external_view()) {
1063 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1064 continue;
1065 }
1066 if (!java_thread->is_being_ext_suspended()) {
1067 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1068 continue;
1069 }
1070
1071 if (!JvmtiSuspendControl::resume(java_thread)) {
1072 results[i] = JVMTI_ERROR_INTERNAL;
1073 continue;
1074 }
1075
1076 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1077 }
1078 // per-thread resume results returned via results parameter
1079 return JVMTI_ERROR_NONE;
1080 } /* end ResumeThreadList */
1081
1082
1083 // Threads_lock NOT held, java_thread not protected by lock
1084 // java_thread - pre-checked
1085 jvmtiError
1086 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1087 oop e = JNIHandles::resolve_external_guard(exception);
1088 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1089
1090 JavaThread::send_async_exception(java_thread->threadObj(), e);
1091
1092 return JVMTI_ERROR_NONE;
1093
1094 } /* end StopThread */
1095
1096
1097 // Threads_lock NOT held
1098 // thread - NOT pre-checked
1099 jvmtiError
1100 JvmtiEnv::InterruptThread(jthread thread) {
1101 // TODO: this is very similar to JVM_Interrupt(); share code in future
1102 JavaThread* current_thread = JavaThread::current();
1103 JavaThread* java_thread = NULL;
1104 ThreadsListHandle tlh(current_thread);
1105 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1106 if (err != JVMTI_ERROR_NONE) {
1107 return err;
1108 }
1109
1110 Thread::interrupt(java_thread);
1111
1112 return JVMTI_ERROR_NONE;
1113 } /* end InterruptThread */
1114
1115
1116 // Threads_lock NOT held
1117 // thread - NOT pre-checked
1118 // info_ptr - pre-checked for NULL
1119 jvmtiError
1120 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1121 ResourceMark rm;
1122 HandleMark hm;
1123
1124 JavaThread* current_thread = JavaThread::current();
1125 ThreadsListHandle tlh(current_thread);
1126
1127 // if thread is NULL the current thread is used
1128 oop thread_oop = NULL;
1129 if (thread == NULL) {
1130 thread_oop = current_thread->threadObj();
1131 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1132 return JVMTI_ERROR_INVALID_THREAD;
1133 }
1134 } else {
1135 JavaThread* java_thread = NULL;
1136 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1137 if (err != JVMTI_ERROR_NONE) {
1138 // We got an error code so we don't have a JavaThread *, but
1139 // only return an error from here if we didn't get a valid
1140 // thread_oop.
1141 if (thread_oop == NULL) {
1142 return err;
1143 }
1144 // We have a valid thread_oop so we can return some thread info.
1145 }
1146 }
1147
1148 Handle thread_obj(current_thread, thread_oop);
1149 Handle name;
1150 ThreadPriority priority;
1151 Handle thread_group;
1152 Handle context_class_loader;
1153 bool is_daemon;
1154
1155 { MutexLocker mu(Threads_lock);
1156
1157 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1158 priority = java_lang_Thread::priority(thread_obj());
1159 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1160 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1161
1162 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1163 context_class_loader = Handle(current_thread, loader);
1164 }
1165 { const char *n;
1166
1167 if (name() != NULL) {
1168 n = java_lang_String::as_utf8_string(name());
1169 } else {
1170 int utf8_length = 0;
1171 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1172 }
1173
1174 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1175 if (info_ptr->name == NULL)
1176 return JVMTI_ERROR_OUT_OF_MEMORY;
1177
1178 strcpy(info_ptr->name, n);
1179 }
1180 info_ptr->is_daemon = is_daemon;
1181 info_ptr->priority = priority;
1182
1183 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1184 jni_reference(context_class_loader);
1185 info_ptr->thread_group = jni_reference(thread_group);
1186
1187 return JVMTI_ERROR_NONE;
1188 } /* end GetThreadInfo */
1189
1190
1191 // Threads_lock NOT held, java_thread not protected by lock
1192 // java_thread - pre-checked
1193 // owned_monitor_count_ptr - pre-checked for NULL
1194 // owned_monitors_ptr - pre-checked for NULL
1195 jvmtiError
1196 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1197 jvmtiError err = JVMTI_ERROR_NONE;
1198 JavaThread* calling_thread = JavaThread::current();
1199
1200 // growable array of jvmti monitors info on the C-heap
1201 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1202 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1203
1204 // It is only safe to perform the direct operation on the current
1205 // thread. All other usage needs to use a vm-safepoint-op for safety.
1206 if (java_thread == calling_thread) {
1207 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1208 } else {
1209 // JVMTI get monitors info at safepoint. Do not require target thread to
1210 // be suspended.
1211 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1212 VMThread::execute(&op);
1213 err = op.result();
1214 }
1215 jint owned_monitor_count = owned_monitors_list->length();
1216 if (err == JVMTI_ERROR_NONE) {
1217 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1218 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1219 // copy into the returned array
1220 for (int i = 0; i < owned_monitor_count; i++) {
1221 (*owned_monitors_ptr)[i] =
1222 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1223 }
1224 *owned_monitor_count_ptr = owned_monitor_count;
1225 }
1226 }
1227 // clean up.
1228 for (int i = 0; i < owned_monitor_count; i++) {
1229 deallocate((unsigned char*)owned_monitors_list->at(i));
1230 }
1231 delete owned_monitors_list;
1232
1233 return err;
1234 } /* end GetOwnedMonitorInfo */
1235
1236
1237 // Threads_lock NOT held, java_thread not protected by lock
1238 // java_thread - pre-checked
1239 // monitor_info_count_ptr - pre-checked for NULL
1240 // monitor_info_ptr - pre-checked for NULL
1241 jvmtiError
1242 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1243 jvmtiError err = JVMTI_ERROR_NONE;
1244 JavaThread* calling_thread = JavaThread::current();
1245
1246 // growable array of jvmti monitors info on the C-heap
1247 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1248 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1249
1250 // It is only safe to perform the direct operation on the current
1251 // thread. All other usage needs to use a vm-safepoint-op for safety.
1252 if (java_thread == calling_thread) {
1253 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1254 } else {
1255 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1256 // be suspended.
1257 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1258 VMThread::execute(&op);
1259 err = op.result();
1260 }
1261
1262 jint owned_monitor_count = owned_monitors_list->length();
1263 if (err == JVMTI_ERROR_NONE) {
1264 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1265 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1266 // copy to output array.
1267 for (int i = 0; i < owned_monitor_count; i++) {
1268 (*monitor_info_ptr)[i].monitor =
1269 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1270 (*monitor_info_ptr)[i].stack_depth =
1271 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1272 }
1273 }
1274 *monitor_info_count_ptr = owned_monitor_count;
1275 }
1276
1277 // clean up.
1278 for (int i = 0; i < owned_monitor_count; i++) {
1279 deallocate((unsigned char*)owned_monitors_list->at(i));
1280 }
1281 delete owned_monitors_list;
1282
1283 return err;
1284 } /* end GetOwnedMonitorStackDepthInfo */
1285
1286
1287 // Threads_lock NOT held, java_thread not protected by lock
1288 // java_thread - pre-checked
1289 // monitor_ptr - pre-checked for NULL
1290 jvmtiError
1291 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1292 jvmtiError err = JVMTI_ERROR_NONE;
1293 JavaThread* calling_thread = JavaThread::current();
1294
1295 // It is only safe to perform the direct operation on the current
1296 // thread. All other usage needs to use a vm-safepoint-op for safety.
1297 if (java_thread == calling_thread) {
1298 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1299 } else {
1300 // get contended monitor information at safepoint.
1301 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1302 VMThread::execute(&op);
1303 err = op.result();
1304 }
1305 return err;
1306 } /* end GetCurrentContendedMonitor */
1307
1308
1309 // Threads_lock NOT held
1310 // thread - NOT pre-checked
1311 // proc - pre-checked for NULL
1312 // arg - NULL is a valid value, must be checked
1313 jvmtiError
1314 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1315 JavaThread* current_thread = JavaThread::current();
1316
1317 JavaThread* java_thread = NULL;
1318 oop thread_oop = NULL;
1319 ThreadsListHandle tlh(current_thread);
1320 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1321 if (err != JVMTI_ERROR_NONE) {
1322 // We got an error code so we don't have a JavaThread *, but
1323 // only return an error from here if we didn't get a valid
1324 // thread_oop.
1325 if (thread_oop == NULL) {
1326 return err;
1327 }
1328 // We have a valid thread_oop.
1329 }
1330
1331 if (java_thread != NULL) {
1332 // 'thread' refers to an existing JavaThread.
1333 return JVMTI_ERROR_INVALID_THREAD;
1334 }
1335
1336 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1337 return JVMTI_ERROR_INVALID_PRIORITY;
1338 }
1339
1340 Handle thread_hndl(current_thread, thread_oop);
1341 {
1342 MutexLocker mu(Threads_lock); // grab Threads_lock
1343
1344 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1345
1346 // At this point it may be possible that no osthread was created for the
1347 // JavaThread due to lack of memory.
1348 if (new_thread == NULL || new_thread->osthread() == NULL) {
1349 if (new_thread != NULL) {
1350 new_thread->smr_delete();
1351 }
1352 return JVMTI_ERROR_OUT_OF_MEMORY;
1353 }
1354
1355 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1356 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1357 java_lang_Thread::set_daemon(thread_hndl());
1358
1359 new_thread->set_threadObj(thread_hndl());
1360 Threads::add(new_thread);
1361 Thread::start(new_thread);
1362 } // unlock Threads_lock
1363
1364 return JVMTI_ERROR_NONE;
1365 } /* end RunAgentThread */
1366
1367 //
1368 // Thread Group functions
1369 //
1370
1371 // group_count_ptr - pre-checked for NULL
1372 // groups_ptr - pre-checked for NULL
1373 jvmtiError
1374 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1375 JavaThread* current_thread = JavaThread::current();
1376
1377 // Only one top level thread group now.
1378 *group_count_ptr = 1;
1379
1380 // Allocate memory to store global-refs to the thread groups.
1381 // Assume this area is freed by caller.
1382 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1383
1384 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1385
1386 // Convert oop to Handle, then convert Handle to global-ref.
1387 {
1388 HandleMark hm(current_thread);
1389 Handle system_thread_group(current_thread, Universe::system_thread_group());
1390 *groups_ptr[0] = jni_reference(system_thread_group);
1391 }
1392
1393 return JVMTI_ERROR_NONE;
1394 } /* end GetTopThreadGroups */
1395
1396
1397 // info_ptr - pre-checked for NULL
1398 jvmtiError
1399 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1400 ResourceMark rm;
1401 HandleMark hm;
1402
1403 JavaThread* current_thread = JavaThread::current();
1404
1405 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1406 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1407
1408 const char* name;
1409 Handle parent_group;
1410 bool is_daemon;
1411 ThreadPriority max_priority;
1412
1413 { MutexLocker mu(Threads_lock);
1414
1415 name = java_lang_ThreadGroup::name(group_obj());
1416 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1417 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1418 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1419 }
1420
1421 info_ptr->is_daemon = is_daemon;
1422 info_ptr->max_priority = max_priority;
1423 info_ptr->parent = jni_reference(parent_group);
1424
1425 if (name != NULL) {
1426 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1427 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1428 strcpy(info_ptr->name, name);
1429 } else {
1430 info_ptr->name = NULL;
1431 }
1432
1433 return JVMTI_ERROR_NONE;
1434 } /* end GetThreadGroupInfo */
1435
1436
1437 // thread_count_ptr - pre-checked for NULL
1438 // threads_ptr - pre-checked for NULL
1439 // group_count_ptr - pre-checked for NULL
1440 // groups_ptr - pre-checked for NULL
1441 jvmtiError
1442 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1443 JavaThread* current_thread = JavaThread::current();
1444 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1445 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1446
1447 Handle *thread_objs = NULL;
1448 Handle *group_objs = NULL;
1449 int nthreads = 0;
1450 int ngroups = 0;
1451 int hidden_threads = 0;
1452
1453 ResourceMark rm(current_thread);
1454 HandleMark hm(current_thread);
1455
1456 Handle group_hdl(current_thread, group_obj);
1457
1458 { // Cannot allow thread or group counts to change.
1459 MutexLocker mu(Threads_lock);
1460
1461 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1462 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1463
1464 if (nthreads > 0) {
1465 ThreadsListHandle tlh(current_thread);
1466 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1467 assert(nthreads <= threads->length(), "too many threads");
1468 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1469 for (int i=0, j=0; i<nthreads; i++) {
1470 oop thread_obj = threads->obj_at(i);
1471 assert(thread_obj != NULL, "thread_obj is NULL");
1472 JavaThread *java_thread = NULL;
1473 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1474 if (err == JVMTI_ERROR_NONE) {
1475 // Have a valid JavaThread*.
1476 if (java_thread->is_hidden_from_external_view()) {
1477 // Filter out hidden java threads.
1478 hidden_threads++;
1479 continue;
1480 }
1481 } else {
1482 // We couldn't convert thread_obj into a JavaThread*.
1483 if (err == JVMTI_ERROR_INVALID_THREAD) {
1484 // The thread_obj does not refer to a java.lang.Thread object
1485 // so skip it.
1486 hidden_threads++;
1487 continue;
1488 }
1489 // We have a valid thread_obj, but no JavaThread*; the caller
1490 // can still have limited use for the thread_obj.
1491 }
1492 thread_objs[j++] = Handle(current_thread, thread_obj);
1493 }
1494 nthreads -= hidden_threads;
1495 } // ThreadsListHandle is destroyed here.
1496
1497 if (ngroups > 0) {
1498 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1499 assert(ngroups <= groups->length(), "too many groups");
1500 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1501 for (int i=0; i<ngroups; i++) {
1502 oop group_obj = groups->obj_at(i);
1503 assert(group_obj != NULL, "group_obj != NULL");
1504 group_objs[i] = Handle(current_thread, group_obj);
1505 }
1506 }
1507 }
1508
1509 // have to make global handles outside of Threads_lock
1510 *group_count_ptr = ngroups;
1511 *thread_count_ptr = nthreads;
1512 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1513 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1514 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1515 return JVMTI_ERROR_OUT_OF_MEMORY;
1516 }
1517 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1518 return JVMTI_ERROR_OUT_OF_MEMORY;
1519 }
1520
1521 return JVMTI_ERROR_NONE;
1522 } /* end GetThreadGroupChildren */
1523
1524
1525 //
1526 // Stack Frame functions
1527 //
1528
1529 // Threads_lock NOT held, java_thread not protected by lock
1530 // java_thread - pre-checked
1531 // max_frame_count - pre-checked to be greater than or equal to 0
1532 // frame_buffer - pre-checked for NULL
1533 // count_ptr - pre-checked for NULL
1534 jvmtiError
1535 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1536 jvmtiError err = JVMTI_ERROR_NONE;
1537
1538 // It is only safe to perform the direct operation on the current
1539 // thread. All other usage needs to use a vm-safepoint-op for safety.
1540 if (java_thread == JavaThread::current()) {
1541 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1542 } else {
1543 // JVMTI get stack trace at safepoint. Do not require target thread to
1544 // be suspended.
1545 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1546 VMThread::execute(&op);
1547 err = op.result();
1548 }
1549
1550 return err;
1551 } /* end GetStackTrace */
1552
1553
1554 // max_frame_count - pre-checked to be greater than or equal to 0
1555 // stack_info_ptr - pre-checked for NULL
1556 // thread_count_ptr - pre-checked for NULL
1557 jvmtiError
1558 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1559 jvmtiError err = JVMTI_ERROR_NONE;
1560 JavaThread* calling_thread = JavaThread::current();
1561
1562 // JVMTI get stack traces at safepoint.
1563 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1564 VMThread::execute(&op);
1565 *thread_count_ptr = op.final_thread_count();
1566 *stack_info_ptr = op.stack_info();
1567 err = op.result();
1568 return err;
1569 } /* end GetAllStackTraces */
1570
1571
1572 // thread_count - pre-checked to be greater than or equal to 0
1573 // thread_list - pre-checked for NULL
1574 // max_frame_count - pre-checked to be greater than or equal to 0
1575 // stack_info_ptr - pre-checked for NULL
1576 jvmtiError
1577 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1578 jvmtiError err = JVMTI_ERROR_NONE;
1579 // JVMTI get stack traces at safepoint.
1580 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1581 VMThread::execute(&op);
1582 err = op.result();
1583 if (err == JVMTI_ERROR_NONE) {
1584 *stack_info_ptr = op.stack_info();
1585 }
1586 return err;
1587 } /* end GetThreadListStackTraces */
1588
1589
1590 // Threads_lock NOT held, java_thread not protected by lock
1591 // java_thread - pre-checked
1592 // count_ptr - pre-checked for NULL
1593 jvmtiError
1594 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1595 jvmtiError err = JVMTI_ERROR_NONE;
1596
1597 // retrieve or create JvmtiThreadState.
1598 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1599 if (state == NULL) {
1600 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1601 }
1602
1603 // It is only safe to perform the direct operation on the current
1604 // thread. All other usage needs to use a vm-safepoint-op for safety.
1605 if (java_thread == JavaThread::current()) {
1606 err = get_frame_count(state, count_ptr);
1607 } else {
1608 // get java stack frame count at safepoint.
1609 VM_GetFrameCount op(this, state, count_ptr);
1610 VMThread::execute(&op);
1611 err = op.result();
1612 }
1613 return err;
1614 } /* end GetFrameCount */
1615
1616
1617 // Threads_lock NOT held, java_thread not protected by lock
1618 // java_thread - pre-checked
1619 jvmtiError
1620 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1621 JavaThread* current_thread = JavaThread::current();
1622 HandleMark hm(current_thread);
1623 uint32_t debug_bits = 0;
1624
1625 // retrieve or create the state
1626 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1627 if (state == NULL) {
1628 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1629 }
1630
1631 // Check if java_thread is fully suspended
1632 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1633 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1634 }
1635 // Check to see if a PopFrame was already in progress
1636 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1637 // Probably possible for JVMTI clients to trigger this, but the
1638 // JPDA backend shouldn't allow this to happen
1639 return JVMTI_ERROR_INTERNAL;
1640 }
1641
1642 {
1643 // Was workaround bug
1644 // 4812902: popFrame hangs if the method is waiting at a synchronize
1645 // Catch this condition and return an error to avoid hanging.
1646 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1647 OSThread* osThread = java_thread->osthread();
1648 if (osThread->get_state() == MONITOR_WAIT) {
1649 return JVMTI_ERROR_OPAQUE_FRAME;
1650 }
1651 }
1652
1653 {
1654 ResourceMark rm(current_thread);
1655 // Check if there are more than one Java frame in this thread, that the top two frames
1656 // are Java (not native) frames, and that there is no intervening VM frame
1657 int frame_count = 0;
1658 bool is_interpreted[2];
1659 intptr_t *frame_sp[2];
1660 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1661 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1662 methodHandle mh(current_thread, vfs.method());
1663 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1664 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1665 frame_sp[frame_count] = vfs.frame_id();
1666 if (++frame_count > 1) break;
1667 }
1668 if (frame_count < 2) {
1669 // We haven't found two adjacent non-native Java frames on the top.
1670 // There can be two situations here:
1671 // 1. There are no more java frames
1672 // 2. Two top java frames are separated by non-java native frames
1673 if(vframeFor(java_thread, 1) == NULL) {
1674 return JVMTI_ERROR_NO_MORE_FRAMES;
1675 } else {
1676 // Intervening non-java native or VM frames separate java frames.
1677 // Current implementation does not support this. See bug #5031735.
1678 // In theory it is possible to pop frames in such cases.
1679 return JVMTI_ERROR_OPAQUE_FRAME;
1680 }
1681 }
1682
1683 // If any of the top 2 frames is a compiled one, need to deoptimize it
1684 for (int i = 0; i < 2; i++) {
1685 if (!is_interpreted[i]) {
1686 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1687 }
1688 }
1689
1690 // Update the thread state to reflect that the top frame is popped
1691 // so that cur_stack_depth is maintained properly and all frameIDs
1692 // are invalidated.
1693 // The current frame will be popped later when the suspended thread
1694 // is resumed and right before returning from VM to Java.
1695 // (see call_VM_base() in assembler_<cpu>.cpp).
1696
1697 // It's fine to update the thread state here because no JVMTI events
1698 // shall be posted for this PopFrame.
1699
1700 // It is only safe to perform the direct operation on the current
1701 // thread. All other usage needs to use a vm-safepoint-op for safety.
1702 if (java_thread == JavaThread::current()) {
1703 state->update_for_pop_top_frame();
1704 } else {
1705 VM_UpdateForPopTopFrame op(state);
1706 VMThread::execute(&op);
1707 jvmtiError err = op.result();
1708 if (err != JVMTI_ERROR_NONE) {
1709 return err;
1710 }
1711 }
1712
1713 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1714 // Set pending step flag for this popframe and it is cleared when next
1715 // step event is posted.
1716 state->set_pending_step_for_popframe();
1717 }
1718
1719 return JVMTI_ERROR_NONE;
1720 } /* end PopFrame */
1721
1722
1723 // Threads_lock NOT held, java_thread not protected by lock
1724 // java_thread - pre-checked
1725 // java_thread - unchecked
1726 // depth - pre-checked as non-negative
1727 // method_ptr - pre-checked for NULL
1728 // location_ptr - pre-checked for NULL
1729 jvmtiError
1730 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1731 jvmtiError err = JVMTI_ERROR_NONE;
1732
1733 // It is only safe to perform the direct operation on the current
1734 // thread. All other usage needs to use a vm-safepoint-op for safety.
1735 if (java_thread == JavaThread::current()) {
1736 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1737 } else {
1738 // JVMTI get java stack frame location at safepoint.
1739 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1740 VMThread::execute(&op);
1741 err = op.result();
1742 }
1743 return err;
1744 } /* end GetFrameLocation */
1745
1746
1747 // Threads_lock NOT held, java_thread not protected by lock
1748 // java_thread - pre-checked
1749 // java_thread - unchecked
1750 // depth - pre-checked as non-negative
1751 jvmtiError
1752 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1753 jvmtiError err = JVMTI_ERROR_NONE;
1754 ResourceMark rm;
1755 uint32_t debug_bits = 0;
1756
1757 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1758 if (state == NULL) {
1759 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1760 }
1761
1762 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1763 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1764 }
1765
1766 if (TraceJVMTICalls) {
1767 JvmtiSuspendControl::print();
1768 }
1769
1770 vframe *vf = vframeFor(java_thread, depth);
1771 if (vf == NULL) {
1772 return JVMTI_ERROR_NO_MORE_FRAMES;
1773 }
1774
1775 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1776 return JVMTI_ERROR_OPAQUE_FRAME;
1777 }
1778
1779 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1780
1781 // It is only safe to perform the direct operation on the current
1782 // thread. All other usage needs to use a vm-safepoint-op for safety.
1783 if (java_thread == JavaThread::current()) {
1784 int frame_number = state->count_frames() - depth;
1785 state->env_thread_state(this)->set_frame_pop(frame_number);
1786 } else {
1787 VM_SetFramePop op(this, state, depth);
1788 VMThread::execute(&op);
1789 err = op.result();
1790 }
1791 return err;
1792 } /* end NotifyFramePop */
1793
1794
1795 //
1796 // Force Early Return functions
1797 //
1798
1799 // Threads_lock NOT held, java_thread not protected by lock
1800 // java_thread - pre-checked
1801 jvmtiError
1802 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1803 jvalue val;
1804 val.l = value;
1805 return force_early_return(java_thread, val, atos);
1806 } /* end ForceEarlyReturnObject */
1807
1808
1809 // Threads_lock NOT held, java_thread not protected by lock
1810 // java_thread - pre-checked
1811 jvmtiError
1812 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1813 jvalue val;
1814 val.i = value;
1815 return force_early_return(java_thread, val, itos);
1816 } /* end ForceEarlyReturnInt */
1817
1818
1819 // Threads_lock NOT held, java_thread not protected by lock
1820 // java_thread - pre-checked
1821 jvmtiError
1822 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1823 jvalue val;
1824 val.j = value;
1825 return force_early_return(java_thread, val, ltos);
1826 } /* end ForceEarlyReturnLong */
1827
1828
1829 // Threads_lock NOT held, java_thread not protected by lock
1830 // java_thread - pre-checked
1831 jvmtiError
1832 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1833 jvalue val;
1834 val.f = value;
1835 return force_early_return(java_thread, val, ftos);
1836 } /* end ForceEarlyReturnFloat */
1837
1838
1839 // Threads_lock NOT held, java_thread not protected by lock
1840 // java_thread - pre-checked
1841 jvmtiError
1842 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1843 jvalue val;
1844 val.d = value;
1845 return force_early_return(java_thread, val, dtos);
1846 } /* end ForceEarlyReturnDouble */
1847
1848
1849 // Threads_lock NOT held, java_thread not protected by lock
1850 // java_thread - pre-checked
1851 jvmtiError
1852 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1853 jvalue val;
1854 val.j = 0L;
1855 return force_early_return(java_thread, val, vtos);
1856 } /* end ForceEarlyReturnVoid */
1857
1858
1859 //
1860 // Heap functions
1861 //
1862
1863 // klass - NULL is a valid value, must be checked
1864 // initial_object - NULL is a valid value, must be checked
1865 // callbacks - pre-checked for NULL
1866 // user_data - NULL is a valid value, must be checked
1867 jvmtiError
1868 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1869 // check klass if provided
1870 Klass* k = NULL;
1871 if (klass != NULL) {
1872 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1873 if (k_mirror == NULL) {
1874 return JVMTI_ERROR_INVALID_CLASS;
1875 }
1876 if (java_lang_Class::is_primitive(k_mirror)) {
1877 return JVMTI_ERROR_NONE;
1878 }
1879 k = java_lang_Class::as_Klass(k_mirror);
1880 if (klass == NULL) {
1881 return JVMTI_ERROR_INVALID_CLASS;
1882 }
1883 }
1884
1885 if (initial_object != NULL) {
1886 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1887 if (init_obj == NULL) {
1888 return JVMTI_ERROR_INVALID_OBJECT;
1889 }
1890 }
1891
1892 Thread *thread = Thread::current();
1893 HandleMark hm(thread);
1894
1895 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1896 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1897 return JVMTI_ERROR_NONE;
1898 } /* end FollowReferences */
1899
1900
1901 // klass - NULL is a valid value, must be checked
1902 // callbacks - pre-checked for NULL
1903 // user_data - NULL is a valid value, must be checked
1904 jvmtiError
1905 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1906 // check klass if provided
1907 Klass* k = NULL;
1908 if (klass != NULL) {
1909 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1910 if (k_mirror == NULL) {
1911 return JVMTI_ERROR_INVALID_CLASS;
1912 }
1913 if (java_lang_Class::is_primitive(k_mirror)) {
1914 return JVMTI_ERROR_NONE;
1915 }
1916 k = java_lang_Class::as_Klass(k_mirror);
1917 if (k == NULL) {
1918 return JVMTI_ERROR_INVALID_CLASS;
1919 }
1920 }
1921
1922 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1923 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1924 return JVMTI_ERROR_NONE;
1925 } /* end IterateThroughHeap */
1926
1927
1928 // tag_ptr - pre-checked for NULL
1929 jvmtiError
1930 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1931 oop o = JNIHandles::resolve_external_guard(object);
1932 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1933 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1934 return JVMTI_ERROR_NONE;
1935 } /* end GetTag */
1936
1937
1938 jvmtiError
1939 JvmtiEnv::SetTag(jobject object, jlong tag) {
1940 oop o = JNIHandles::resolve_external_guard(object);
1941 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1942 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1943 return JVMTI_ERROR_NONE;
1944 } /* end SetTag */
1945
1946
1947 // tag_count - pre-checked to be greater than or equal to 0
1948 // tags - pre-checked for NULL
1949 // count_ptr - pre-checked for NULL
1950 // object_result_ptr - NULL is a valid value, must be checked
1951 // tag_result_ptr - NULL is a valid value, must be checked
1952 jvmtiError
1953 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1954 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1955 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1956 } /* end GetObjectsWithTags */
1957
1958
1959 jvmtiError
1960 JvmtiEnv::ForceGarbageCollection() {
1961 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1962 return JVMTI_ERROR_NONE;
1963 } /* end ForceGarbageCollection */
1964
1965
1966 //
1967 // Heap (1.0) functions
1968 //
1969
1970 // object_reference_callback - pre-checked for NULL
1971 // user_data - NULL is a valid value, must be checked
1972 jvmtiError
1973 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1974 oop o = JNIHandles::resolve_external_guard(object);
1975 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1976 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1977 return JVMTI_ERROR_NONE;
1978 } /* end IterateOverObjectsReachableFromObject */
1979
1980
1981 // heap_root_callback - NULL is a valid value, must be checked
1982 // stack_ref_callback - NULL is a valid value, must be checked
1983 // object_ref_callback - NULL is a valid value, must be checked
1984 // user_data - NULL is a valid value, must be checked
1985 jvmtiError
1986 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1987 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1988 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1989 return JVMTI_ERROR_NONE;
1990 } /* end IterateOverReachableObjects */
1991
1992
1993 // heap_object_callback - pre-checked for NULL
1994 // user_data - NULL is a valid value, must be checked
1995 jvmtiError
1996 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1997 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1998 Thread *thread = Thread::current();
1999 HandleMark hm(thread);
2000 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
2001 return JVMTI_ERROR_NONE;
2002 } /* end IterateOverHeap */
2003
2004
2005 // k_mirror - may be primitive, this must be checked
2006 // heap_object_callback - pre-checked for NULL
2007 // user_data - NULL is a valid value, must be checked
2008 jvmtiError
2009 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2010 if (java_lang_Class::is_primitive(k_mirror)) {
2011 // DO PRIMITIVE CLASS PROCESSING
2012 return JVMTI_ERROR_NONE;
2013 }
2014 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2015 if (klass == NULL) {
2016 return JVMTI_ERROR_INVALID_CLASS;
2017 }
2018 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2019 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2020 return JVMTI_ERROR_NONE;
2021 } /* end IterateOverInstancesOfClass */
2022
2023
2024 //
2025 // Local Variable functions
2026 //
2027
2028 // Threads_lock NOT held, java_thread not protected by lock
2029 // java_thread - pre-checked
2030 // java_thread - unchecked
2031 // depth - pre-checked as non-negative
2032 // value_ptr - pre-checked for NULL
2033 jvmtiError
2034 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2035 JavaThread* current_thread = JavaThread::current();
2036 // rm object is created to clean up the javaVFrame created in
2037 // doit_prologue(), but after doit() is finished with it.
2038 ResourceMark rm(current_thread);
2039
2040 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2041 VMThread::execute(&op);
2042 jvmtiError err = op.result();
2043 if (err != JVMTI_ERROR_NONE) {
2044 return err;
2045 } else {
2046 *value_ptr = op.value().l;
2047 return JVMTI_ERROR_NONE;
2048 }
2049 } /* end GetLocalObject */
2050
2051 // Threads_lock NOT held, java_thread not protected by lock
2052 // java_thread - pre-checked
2053 // java_thread - unchecked
2054 // depth - pre-checked as non-negative
2055 // value - pre-checked for NULL
2056 jvmtiError
2057 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2058 JavaThread* current_thread = JavaThread::current();
2059 // rm object is created to clean up the javaVFrame created in
2060 // doit_prologue(), but after doit() is finished with it.
2061 ResourceMark rm(current_thread);
2062
2063 VM_GetReceiver op(java_thread, current_thread, depth);
2064 VMThread::execute(&op);
2065 jvmtiError err = op.result();
2066 if (err != JVMTI_ERROR_NONE) {
2067 return err;
2068 } else {
2069 *value_ptr = op.value().l;
2070 return JVMTI_ERROR_NONE;
2071 }
2072 } /* end GetLocalInstance */
2073
2074
2075 // Threads_lock NOT held, java_thread not protected by lock
2076 // java_thread - pre-checked
2077 // java_thread - unchecked
2078 // depth - pre-checked as non-negative
2079 // value_ptr - pre-checked for NULL
2080 jvmtiError
2081 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2082 // rm object is created to clean up the javaVFrame created in
2083 // doit_prologue(), but after doit() is finished with it.
2084 ResourceMark rm;
2085
2086 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2087 VMThread::execute(&op);
2088 *value_ptr = op.value().i;
2089 return op.result();
2090 } /* end GetLocalInt */
2091
2092
2093 // Threads_lock NOT held, java_thread not protected by lock
2094 // java_thread - pre-checked
2095 // java_thread - unchecked
2096 // depth - pre-checked as non-negative
2097 // value_ptr - pre-checked for NULL
2098 jvmtiError
2099 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2100 // rm object is created to clean up the javaVFrame created in
2101 // doit_prologue(), but after doit() is finished with it.
2102 ResourceMark rm;
2103
2104 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2105 VMThread::execute(&op);
2106 *value_ptr = op.value().j;
2107 return op.result();
2108 } /* end GetLocalLong */
2109
2110
2111 // Threads_lock NOT held, java_thread not protected by lock
2112 // java_thread - pre-checked
2113 // java_thread - unchecked
2114 // depth - pre-checked as non-negative
2115 // value_ptr - pre-checked for NULL
2116 jvmtiError
2117 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2118 // rm object is created to clean up the javaVFrame created in
2119 // doit_prologue(), but after doit() is finished with it.
2120 ResourceMark rm;
2121
2122 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2123 VMThread::execute(&op);
2124 *value_ptr = op.value().f;
2125 return op.result();
2126 } /* end GetLocalFloat */
2127
2128
2129 // Threads_lock NOT held, java_thread not protected by lock
2130 // java_thread - pre-checked
2131 // java_thread - unchecked
2132 // depth - pre-checked as non-negative
2133 // value_ptr - pre-checked for NULL
2134 jvmtiError
2135 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2136 // rm object is created to clean up the javaVFrame created in
2137 // doit_prologue(), but after doit() is finished with it.
2138 ResourceMark rm;
2139
2140 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2141 VMThread::execute(&op);
2142 *value_ptr = op.value().d;
2143 return op.result();
2144 } /* end GetLocalDouble */
2145
2146
2147 // Threads_lock NOT held, java_thread not protected by lock
2148 // java_thread - pre-checked
2149 // java_thread - unchecked
2150 // depth - pre-checked as non-negative
2151 jvmtiError
2152 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2153 // rm object is created to clean up the javaVFrame created in
2154 // doit_prologue(), but after doit() is finished with it.
2155 ResourceMark rm;
2156 jvalue val;
2157 val.l = value;
2158 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2159 VMThread::execute(&op);
2160 return op.result();
2161 } /* end SetLocalObject */
2162
2163
2164 // Threads_lock NOT held, java_thread not protected by lock
2165 // java_thread - pre-checked
2166 // java_thread - unchecked
2167 // depth - pre-checked as non-negative
2168 jvmtiError
2169 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2170 // rm object is created to clean up the javaVFrame created in
2171 // doit_prologue(), but after doit() is finished with it.
2172 ResourceMark rm;
2173 jvalue val;
2174 val.i = value;
2175 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2176 VMThread::execute(&op);
2177 return op.result();
2178 } /* end SetLocalInt */
2179
2180
2181 // Threads_lock NOT held, java_thread not protected by lock
2182 // java_thread - pre-checked
2183 // java_thread - unchecked
2184 // depth - pre-checked as non-negative
2185 jvmtiError
2186 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2187 // rm object is created to clean up the javaVFrame created in
2188 // doit_prologue(), but after doit() is finished with it.
2189 ResourceMark rm;
2190 jvalue val;
2191 val.j = value;
2192 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2193 VMThread::execute(&op);
2194 return op.result();
2195 } /* end SetLocalLong */
2196
2197
2198 // Threads_lock NOT held, java_thread not protected by lock
2199 // java_thread - pre-checked
2200 // java_thread - unchecked
2201 // depth - pre-checked as non-negative
2202 jvmtiError
2203 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2204 // rm object is created to clean up the javaVFrame created in
2205 // doit_prologue(), but after doit() is finished with it.
2206 ResourceMark rm;
2207 jvalue val;
2208 val.f = value;
2209 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2210 VMThread::execute(&op);
2211 return op.result();
2212 } /* end SetLocalFloat */
2213
2214
2215 // Threads_lock NOT held, java_thread not protected by lock
2216 // java_thread - pre-checked
2217 // java_thread - unchecked
2218 // depth - pre-checked as non-negative
2219 jvmtiError
2220 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2221 // rm object is created to clean up the javaVFrame created in
2222 // doit_prologue(), but after doit() is finished with it.
2223 ResourceMark rm;
2224 jvalue val;
2225 val.d = value;
2226 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2227 VMThread::execute(&op);
2228 return op.result();
2229 } /* end SetLocalDouble */
2230
2231
2232 //
2233 // Breakpoint functions
2234 //
2235
2236 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2237 jvmtiError
2238 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2239 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2240 if (location < 0) { // simple invalid location check first
2241 return JVMTI_ERROR_INVALID_LOCATION;
2242 }
2243 // verify that the breakpoint is not past the end of the method
2244 if (location >= (jlocation) method_oop->code_size()) {
2245 return JVMTI_ERROR_INVALID_LOCATION;
2246 }
2247
2248 ResourceMark rm;
2249 JvmtiBreakpoint bp(method_oop, location);
2250 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2251 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2252 return JVMTI_ERROR_DUPLICATE;
2253
2254 if (TraceJVMTICalls) {
2255 jvmti_breakpoints.print();
2256 }
2257
2258 return JVMTI_ERROR_NONE;
2259 } /* end SetBreakpoint */
2260
2261
2262 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2263 jvmtiError
2264 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2265 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2266
2267 if (location < 0) { // simple invalid location check first
2268 return JVMTI_ERROR_INVALID_LOCATION;
2269 }
2270
2271 // verify that the breakpoint is not past the end of the method
2272 if (location >= (jlocation) method_oop->code_size()) {
2273 return JVMTI_ERROR_INVALID_LOCATION;
2274 }
2275
2276 JvmtiBreakpoint bp(method_oop, location);
2277
2278 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2279 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2280 return JVMTI_ERROR_NOT_FOUND;
2281
2282 if (TraceJVMTICalls) {
2283 jvmti_breakpoints.print();
2284 }
2285
2286 return JVMTI_ERROR_NONE;
2287 } /* end ClearBreakpoint */
2288
2289
2290 //
2291 // Watched Field functions
2292 //
2293
2294 jvmtiError
2295 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2296 // make sure we haven't set this watch before
2297 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2298 fdesc_ptr->set_is_field_access_watched(true);
2299
2300 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2301
2302 return JVMTI_ERROR_NONE;
2303 } /* end SetFieldAccessWatch */
2304
2305
2306 jvmtiError
2307 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2308 // make sure we have a watch to clear
2309 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2310 fdesc_ptr->set_is_field_access_watched(false);
2311
2312 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2313
2314 return JVMTI_ERROR_NONE;
2315 } /* end ClearFieldAccessWatch */
2316
2317
2318 jvmtiError
2319 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2320 // make sure we haven't set this watch before
2321 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2322 fdesc_ptr->set_is_field_modification_watched(true);
2323
2324 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2325
2326 return JVMTI_ERROR_NONE;
2327 } /* end SetFieldModificationWatch */
2328
2329
2330 jvmtiError
2331 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2332 // make sure we have a watch to clear
2333 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2334 fdesc_ptr->set_is_field_modification_watched(false);
2335
2336 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2337
2338 return JVMTI_ERROR_NONE;
2339 } /* end ClearFieldModificationWatch */
2340
2341 //
2342 // Class functions
2343 //
2344
2345
2346 // k_mirror - may be primitive, this must be checked
2347 // signature_ptr - NULL is a valid value, must be checked
2348 // generic_ptr - NULL is a valid value, must be checked
2349 jvmtiError
2350 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2351 ResourceMark rm;
2352 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2353 Klass* k = NULL;
2354 if (!isPrimitive) {
2355 k = java_lang_Class::as_Klass(k_mirror);
2356 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2357 }
2358 if (signature_ptr != NULL) {
2359 char* result = NULL;
2360 if (isPrimitive) {
2361 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2362 result = (char*) jvmtiMalloc(2);
2363 result[0] = tchar;
2364 result[1] = '\0';
2365 } else {
2366 const char* class_sig = k->signature_name();
2367 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2368 strcpy(result, class_sig);
2369 }
2370 *signature_ptr = result;
2371 }
2372 if (generic_ptr != NULL) {
2373 *generic_ptr = NULL;
2374 if (!isPrimitive && k->is_instance_klass()) {
2375 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2376 if (soo != NULL) {
2377 const char *gen_sig = soo->as_C_string();
2378 if (gen_sig != NULL) {
2379 char* gen_result;
2380 jvmtiError err = allocate(strlen(gen_sig) + 1,
2381 (unsigned char **)&gen_result);
2382 if (err != JVMTI_ERROR_NONE) {
2383 return err;
2384 }
2385 strcpy(gen_result, gen_sig);
2386 *generic_ptr = gen_result;
2387 }
2388 }
2389 }
2390 }
2391 return JVMTI_ERROR_NONE;
2392 } /* end GetClassSignature */
2393
2394
2395 // k_mirror - may be primitive, this must be checked
2396 // status_ptr - pre-checked for NULL
2397 jvmtiError
2398 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2399 jint result = 0;
2400 if (java_lang_Class::is_primitive(k_mirror)) {
2401 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2402 } else {
2403 Klass* k = java_lang_Class::as_Klass(k_mirror);
2404 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2405 result = k->jvmti_class_status();
2406 }
2407 *status_ptr = result;
2408
2409 return JVMTI_ERROR_NONE;
2410 } /* end GetClassStatus */
2411
2412
2413 // k_mirror - may be primitive, this must be checked
2414 // source_name_ptr - pre-checked for NULL
2415 jvmtiError
2416 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2417 if (java_lang_Class::is_primitive(k_mirror)) {
2418 return JVMTI_ERROR_ABSENT_INFORMATION;
2419 }
2420 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2421 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2422
2423 if (!k_klass->is_instance_klass()) {
2424 return JVMTI_ERROR_ABSENT_INFORMATION;
2425 }
2426
2427 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2428 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2429 {
2430 JavaThread* current_thread = JavaThread::current();
2431 ResourceMark rm(current_thread);
2432 const char* sfncp = (const char*) sfnOop->as_C_string();
2433 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2434 strcpy(*source_name_ptr, sfncp);
2435 }
2436
2437 return JVMTI_ERROR_NONE;
2438 } /* end GetSourceFileName */
2439
2440
2441 // k_mirror - may be primitive, this must be checked
2442 // modifiers_ptr - pre-checked for NULL
2443 jvmtiError
2444 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2445 JavaThread* current_thread = JavaThread::current();
2446 jint result = 0;
2447 if (!java_lang_Class::is_primitive(k_mirror)) {
2448 Klass* k = java_lang_Class::as_Klass(k_mirror);
2449 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2450 result = k->compute_modifier_flags(current_thread);
2451 JavaThread* THREAD = current_thread; // pass to macros
2452 if (HAS_PENDING_EXCEPTION) {
2453 CLEAR_PENDING_EXCEPTION;
2454 return JVMTI_ERROR_INTERNAL;
2455 };
2456
2457 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2458 if(k->is_super()) {
2459 result |= JVM_ACC_SUPER;
2460 }
2461 } else {
2462 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2463 }
2464 *modifiers_ptr = result;
2465
2466 return JVMTI_ERROR_NONE;
2467 } /* end GetClassModifiers */
2468
2469
2470 // k_mirror - may be primitive, this must be checked
2471 // method_count_ptr - pre-checked for NULL
2472 // methods_ptr - pre-checked for NULL
2473 jvmtiError
2474 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2475 JavaThread* current_thread = JavaThread::current();
2476 HandleMark hm(current_thread);
2477
2478 if (java_lang_Class::is_primitive(k_mirror)) {
2479 *method_count_ptr = 0;
2480 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2481 return JVMTI_ERROR_NONE;
2482 }
2483 Klass* k = java_lang_Class::as_Klass(k_mirror);
2484 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2485
2486 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2487 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2488 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2489 }
2490
2491 if (!k->is_instance_klass()) {
2492 *method_count_ptr = 0;
2493 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2494 return JVMTI_ERROR_NONE;
2495 }
2496 InstanceKlass* ik = InstanceKlass::cast(k);
2497 // Allocate the result and fill it in
2498 int result_length = ik->methods()->length();
2499 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2500 int index;
2501 bool jmethodids_found = true;
2502
2503 if (JvmtiExport::can_maintain_original_method_order()) {
2504 // Use the original method ordering indices stored in the class, so we can emit
2505 // jmethodIDs in the order they appeared in the class file
2506 for (index = 0; index < result_length; index++) {
2507 Method* m = ik->methods()->at(index);
2508 int original_index = ik->method_ordering()->at(index);
2509 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2510 jmethodID id;
2511 if (jmethodids_found) {
2512 id = m->find_jmethod_id_or_null();
2513 if (id == NULL) {
2514 // If we find an uninitialized value, make sure there is
2515 // enough space for all the uninitialized values we might
2516 // find.
2517 ik->ensure_space_for_methodids(index);
2518 jmethodids_found = false;
2519 id = m->jmethod_id();
2520 }
2521 } else {
2522 id = m->jmethod_id();
2523 }
2524 result_list[original_index] = id;
2525 }
2526 } else {
2527 // otherwise just copy in any order
2528 for (index = 0; index < result_length; index++) {
2529 Method* m = ik->methods()->at(index);
2530 jmethodID id;
2531 if (jmethodids_found) {
2532 id = m->find_jmethod_id_or_null();
2533 if (id == NULL) {
2534 // If we find an uninitialized value, make sure there is
2535 // enough space for all the uninitialized values we might
2536 // find.
2537 ik->ensure_space_for_methodids(index);
2538 jmethodids_found = false;
2539 id = m->jmethod_id();
2540 }
2541 } else {
2542 id = m->jmethod_id();
2543 }
2544 result_list[index] = id;
2545 }
2546 }
2547 // Fill in return value.
2548 *method_count_ptr = result_length;
2549 *methods_ptr = result_list;
2550
2551 return JVMTI_ERROR_NONE;
2552 } /* end GetClassMethods */
2553
2554
2555 // k_mirror - may be primitive, this must be checked
2556 // field_count_ptr - pre-checked for NULL
2557 // fields_ptr - pre-checked for NULL
2558 jvmtiError
2559 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2560 if (java_lang_Class::is_primitive(k_mirror)) {
2561 *field_count_ptr = 0;
2562 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2563 return JVMTI_ERROR_NONE;
2564 }
2565 JavaThread* current_thread = JavaThread::current();
2566 HandleMark hm(current_thread);
2567 Klass* k = java_lang_Class::as_Klass(k_mirror);
2568 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2569
2570 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2571 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2572 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2573 }
2574
2575 if (!k->is_instance_klass()) {
2576 *field_count_ptr = 0;
2577 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2578 return JVMTI_ERROR_NONE;
2579 }
2580
2581
2582 InstanceKlass* ik = InstanceKlass::cast(k);
2583
2584 int result_count = 0;
2585 // First, count the fields.
2586 FilteredFieldStream flds(ik, true, true);
2587 result_count = flds.field_count();
2588
2589 // Allocate the result and fill it in
2590 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2591 // The JVMTI spec requires fields in the order they occur in the class file,
2592 // this is the reverse order of what FieldStream hands out.
2593 int id_index = (result_count - 1);
2594
2595 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2596 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2597 ik, src_st.offset(),
2598 src_st.access_flags().is_static());
2599 }
2600 assert(id_index == -1, "just checking");
2601 // Fill in the results
2602 *field_count_ptr = result_count;
2603 *fields_ptr = result_list;
2604
2605 return JVMTI_ERROR_NONE;
2606 } /* end GetClassFields */
2607
2608
2609 // k_mirror - may be primitive, this must be checked
2610 // interface_count_ptr - pre-checked for NULL
2611 // interfaces_ptr - pre-checked for NULL
2612 jvmtiError
2613 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2614 {
2615 if (java_lang_Class::is_primitive(k_mirror)) {
2616 *interface_count_ptr = 0;
2617 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2618 return JVMTI_ERROR_NONE;
2619 }
2620 JavaThread* current_thread = JavaThread::current();
2621 HandleMark hm(current_thread);
2622 Klass* k = java_lang_Class::as_Klass(k_mirror);
2623 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2624
2625 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2626 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2627 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2628
2629 if (!k->is_instance_klass()) {
2630 *interface_count_ptr = 0;
2631 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2632 return JVMTI_ERROR_NONE;
2633 }
2634
2635 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2636 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2637 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2638 for (int i_index = 0; i_index < result_length; i_index += 1) {
2639 InstanceKlass* klass_at = interface_list->at(i_index);
2640 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2641 assert(klass_at->is_interface(), "interfaces must be interfaces");
2642 oop mirror_at = klass_at->java_mirror();
2643 Handle handle_at = Handle(current_thread, mirror_at);
2644 result_list[i_index] = (jclass) jni_reference(handle_at);
2645 }
2646 *interface_count_ptr = result_length;
2647 *interfaces_ptr = result_list;
2648 }
2649
2650 return JVMTI_ERROR_NONE;
2651 } /* end GetImplementedInterfaces */
2652
2653
2654 // k_mirror - may be primitive, this must be checked
2655 // minor_version_ptr - pre-checked for NULL
2656 // major_version_ptr - pre-checked for NULL
2657 jvmtiError
2658 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2659 if (java_lang_Class::is_primitive(k_mirror)) {
2660 return JVMTI_ERROR_ABSENT_INFORMATION;
2661 }
2662 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2663
2664 jint status = klass->jvmti_class_status();
2665 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2666 return JVMTI_ERROR_INVALID_CLASS;
2667 }
2668 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2669 return JVMTI_ERROR_ABSENT_INFORMATION;
2670 }
2671
2672 InstanceKlass* ik = InstanceKlass::cast(klass);
2673 *minor_version_ptr = ik->minor_version();
2674 *major_version_ptr = ik->major_version();
2675
2676 return JVMTI_ERROR_NONE;
2677 } /* end GetClassVersionNumbers */
2678
2679
2680 // k_mirror - may be primitive, this must be checked
2681 // constant_pool_count_ptr - pre-checked for NULL
2682 // constant_pool_byte_count_ptr - pre-checked for NULL
2683 // constant_pool_bytes_ptr - pre-checked for NULL
2684 jvmtiError
2685 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2686 if (java_lang_Class::is_primitive(k_mirror)) {
2687 return JVMTI_ERROR_ABSENT_INFORMATION;
2688 }
2689
2690 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2691 Thread *thread = Thread::current();
2692 ResourceMark rm(thread);
2693
2694 jint status = klass->jvmti_class_status();
2695 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2696 return JVMTI_ERROR_INVALID_CLASS;
2697 }
2698 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2699 return JVMTI_ERROR_ABSENT_INFORMATION;
2700 }
2701
2702 InstanceKlass* ik = InstanceKlass::cast(klass);
2703 JvmtiConstantPoolReconstituter reconstituter(ik);
2704 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2705 return reconstituter.get_error();
2706 }
2707
2708 unsigned char *cpool_bytes;
2709 int cpool_size = reconstituter.cpool_size();
2710 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2711 return reconstituter.get_error();
2712 }
2713 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2714 if (res != JVMTI_ERROR_NONE) {
2715 return res;
2716 }
2717 reconstituter.copy_cpool_bytes(cpool_bytes);
2718 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2719 return reconstituter.get_error();
2720 }
2721
2722 constantPoolHandle constants(thread, ik->constants());
2723 *constant_pool_count_ptr = constants->length();
2724 *constant_pool_byte_count_ptr = cpool_size;
2725 *constant_pool_bytes_ptr = cpool_bytes;
2726
2727 return JVMTI_ERROR_NONE;
2728 } /* end GetConstantPool */
2729
2730
2731 // k_mirror - may be primitive, this must be checked
2732 // is_interface_ptr - pre-checked for NULL
2733 jvmtiError
2734 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2735 {
2736 bool result = false;
2737 if (!java_lang_Class::is_primitive(k_mirror)) {
2738 Klass* k = java_lang_Class::as_Klass(k_mirror);
2739 if (k != NULL && k->is_interface()) {
2740 result = true;
2741 }
2742 }
2743 *is_interface_ptr = result;
2744 }
2745
2746 return JVMTI_ERROR_NONE;
2747 } /* end IsInterface */
2748
2749
2750 // k_mirror - may be primitive, this must be checked
2751 // is_array_class_ptr - pre-checked for NULL
2752 jvmtiError
2753 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2754 {
2755 bool result = false;
2756 if (!java_lang_Class::is_primitive(k_mirror)) {
2757 Klass* k = java_lang_Class::as_Klass(k_mirror);
2758 if (k != NULL && k->is_array_klass()) {
2759 result = true;
2760 }
2761 }
2762 *is_array_class_ptr = result;
2763 }
2764
2765 return JVMTI_ERROR_NONE;
2766 } /* end IsArrayClass */
2767
2768
2769 // k_mirror - may be primitive, this must be checked
2770 // classloader_ptr - pre-checked for NULL
2771 jvmtiError
2772 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2773 {
2774 if (java_lang_Class::is_primitive(k_mirror)) {
2775 *classloader_ptr = (jclass) jni_reference(Handle());
2776 return JVMTI_ERROR_NONE;
2777 }
2778 JavaThread* current_thread = JavaThread::current();
2779 HandleMark hm(current_thread);
2780 Klass* k = java_lang_Class::as_Klass(k_mirror);
2781 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2782
2783 oop result_oop = k->class_loader();
2784 if (result_oop == NULL) {
2785 *classloader_ptr = (jclass) jni_reference(Handle());
2786 return JVMTI_ERROR_NONE;
2787 }
2788 Handle result_handle = Handle(current_thread, result_oop);
2789 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2790 *classloader_ptr = result_jnihandle;
2791 }
2792 return JVMTI_ERROR_NONE;
2793 } /* end GetClassLoader */
2794
2795
2796 // k_mirror - may be primitive, this must be checked
2797 // source_debug_extension_ptr - pre-checked for NULL
2798 jvmtiError
2799 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2800 {
2801 if (java_lang_Class::is_primitive(k_mirror)) {
2802 return JVMTI_ERROR_ABSENT_INFORMATION;
2803 }
2804 Klass* k = java_lang_Class::as_Klass(k_mirror);
2805 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2806 if (!k->is_instance_klass()) {
2807 return JVMTI_ERROR_ABSENT_INFORMATION;
2808 }
2809 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2810 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2811
2812 {
2813 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2814 strcpy(*source_debug_extension_ptr, sde);
2815 }
2816 }
2817
2818 return JVMTI_ERROR_NONE;
2819 } /* end GetSourceDebugExtension */
2820
2821 //
2822 // Object functions
2823 //
2824
2825 // hash_code_ptr - pre-checked for NULL
2826 jvmtiError
2827 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2828 oop mirror = JNIHandles::resolve_external_guard(object);
2829 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2830 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2831
2832 {
2833 jint result = (jint) mirror->identity_hash();
2834 *hash_code_ptr = result;
2835 }
2836 return JVMTI_ERROR_NONE;
2837 } /* end GetObjectHashCode */
2838
2839
2840 // info_ptr - pre-checked for NULL
2841 jvmtiError
2842 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2843 JavaThread* calling_thread = JavaThread::current();
2844 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2845 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2846 // Some of the critical threads were not suspended. go to a safepoint and try again
2847 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2848 VMThread::execute(&op);
2849 err = op.result();
2850 }
2851 return err;
2852 } /* end GetObjectMonitorUsage */
2853
2854
2855 //
2856 // Field functions
2857 //
2858
2859 // name_ptr - NULL is a valid value, must be checked
2860 // signature_ptr - NULL is a valid value, must be checked
2861 // generic_ptr - NULL is a valid value, must be checked
2862 jvmtiError
2863 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2864 JavaThread* current_thread = JavaThread::current();
2865 ResourceMark rm(current_thread);
2866 if (name_ptr == NULL) {
2867 // just don't return the name
2868 } else {
2869 const char* fieldName = fdesc_ptr->name()->as_C_string();
2870 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2871 if (*name_ptr == NULL)
2872 return JVMTI_ERROR_OUT_OF_MEMORY;
2873 strcpy(*name_ptr, fieldName);
2874 }
2875 if (signature_ptr== NULL) {
2876 // just don't return the signature
2877 } else {
2878 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2879 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2880 if (*signature_ptr == NULL)
2881 return JVMTI_ERROR_OUT_OF_MEMORY;
2882 strcpy(*signature_ptr, fieldSignature);
2883 }
2884 if (generic_ptr != NULL) {
2885 *generic_ptr = NULL;
2886 Symbol* soop = fdesc_ptr->generic_signature();
2887 if (soop != NULL) {
2888 const char* gen_sig = soop->as_C_string();
2889 if (gen_sig != NULL) {
2890 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2891 if (err != JVMTI_ERROR_NONE) {
2892 return err;
2893 }
2894 strcpy(*generic_ptr, gen_sig);
2895 }
2896 }
2897 }
2898 return JVMTI_ERROR_NONE;
2899 } /* end GetFieldName */
2900
2901
2902 // declaring_class_ptr - pre-checked for NULL
2903 jvmtiError
2904 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2905
2906 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2907 return JVMTI_ERROR_NONE;
2908 } /* end GetFieldDeclaringClass */
2909
2910
2911 // modifiers_ptr - pre-checked for NULL
2912 jvmtiError
2913 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2914
2915 AccessFlags resultFlags = fdesc_ptr->access_flags();
2916 jint result = resultFlags.as_int();
2917 *modifiers_ptr = result;
2918
2919 return JVMTI_ERROR_NONE;
2920 } /* end GetFieldModifiers */
2921
2922
2923 // is_synthetic_ptr - pre-checked for NULL
2924 jvmtiError
2925 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2926 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2927 return JVMTI_ERROR_NONE;
2928 } /* end IsFieldSynthetic */
2929
2930
2931 //
2932 // Method functions
2933 //
2934
2935 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2936 // name_ptr - NULL is a valid value, must be checked
2937 // signature_ptr - NULL is a valid value, must be checked
2938 // generic_ptr - NULL is a valid value, must be checked
2939 jvmtiError
2940 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2941 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2942 JavaThread* current_thread = JavaThread::current();
2943
2944 ResourceMark rm(current_thread); // get the utf8 name and signature
2945 if (name_ptr == NULL) {
2946 // just don't return the name
2947 } else {
2948 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2949 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2950 strcpy(*name_ptr, utf8_name);
2951 }
2952 if (signature_ptr == NULL) {
2953 // just don't return the signature
2954 } else {
2955 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2956 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2957 strcpy(*signature_ptr, utf8_signature);
2958 }
2959
2960 if (generic_ptr != NULL) {
2961 *generic_ptr = NULL;
2962 Symbol* soop = method_oop->generic_signature();
2963 if (soop != NULL) {
2964 const char* gen_sig = soop->as_C_string();
2965 if (gen_sig != NULL) {
2966 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2967 if (err != JVMTI_ERROR_NONE) {
2968 return err;
2969 }
2970 strcpy(*generic_ptr, gen_sig);
2971 }
2972 }
2973 }
2974 return JVMTI_ERROR_NONE;
2975 } /* end GetMethodName */
2976
2977
2978 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2979 // declaring_class_ptr - pre-checked for NULL
2980 jvmtiError
2981 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2982 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2983 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2984 return JVMTI_ERROR_NONE;
2985 } /* end GetMethodDeclaringClass */
2986
2987
2988 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2989 // modifiers_ptr - pre-checked for NULL
2990 jvmtiError
2991 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2992 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2993 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2994 return JVMTI_ERROR_NONE;
2995 } /* end GetMethodModifiers */
2996
2997
2998 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2999 // max_ptr - pre-checked for NULL
3000 jvmtiError
3001 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
3002 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3003 // get max stack
3004 (*max_ptr) = method_oop->max_locals();
3005 return JVMTI_ERROR_NONE;
3006 } /* end GetMaxLocals */
3007
3008
3009 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3010 // size_ptr - pre-checked for NULL
3011 jvmtiError
3012 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3013 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3014 // get size of arguments
3015
3016 (*size_ptr) = method_oop->size_of_parameters();
3017 return JVMTI_ERROR_NONE;
3018 } /* end GetArgumentsSize */
3019
3020
3021 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3022 // entry_count_ptr - pre-checked for NULL
3023 // table_ptr - pre-checked for NULL
3024 jvmtiError
3025 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3026 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3027 if (!method_oop->has_linenumber_table()) {
3028 return (JVMTI_ERROR_ABSENT_INFORMATION);
3029 }
3030
3031 // The line number table is compressed so we don't know how big it is until decompressed.
3032 // Decompression is really fast so we just do it twice.
3033
3034 // Compute size of table
3035 jint num_entries = 0;
3036 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3037 while (stream.read_pair()) {
3038 num_entries++;
3039 }
3040 jvmtiLineNumberEntry *jvmti_table =
3041 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3042
3043 // Fill jvmti table
3044 if (num_entries > 0) {
3045 int index = 0;
3046 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3047 while (stream.read_pair()) {
3048 jvmti_table[index].start_location = (jlocation) stream.bci();
3049 jvmti_table[index].line_number = (jint) stream.line();
3050 index++;
3051 }
3052 assert(index == num_entries, "sanity check");
3053 }
3054
3055 // Set up results
3056 (*entry_count_ptr) = num_entries;
3057 (*table_ptr) = jvmti_table;
3058
3059 return JVMTI_ERROR_NONE;
3060 } /* end GetLineNumberTable */
3061
3062
3063 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3064 // start_location_ptr - pre-checked for NULL
3065 // end_location_ptr - pre-checked for NULL
3066 jvmtiError
3067 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3068
3069 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3070 // get start and end location
3071 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3072 if (method_oop->code_size() == 0) {
3073 // there is no code so there is no start location
3074 (*start_location_ptr) = (jlocation)(-1);
3075 } else {
3076 (*start_location_ptr) = (jlocation)(0);
3077 }
3078
3079 return JVMTI_ERROR_NONE;
3080 } /* end GetMethodLocation */
3081
3082
3083 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3084 // entry_count_ptr - pre-checked for NULL
3085 // table_ptr - pre-checked for NULL
3086 jvmtiError
3087 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3088
3089 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3090 JavaThread* current_thread = JavaThread::current();
3091
3092 // does the klass have any local variable information?
3093 InstanceKlass* ik = method_oop->method_holder();
3094 if (!ik->access_flags().has_localvariable_table()) {
3095 return (JVMTI_ERROR_ABSENT_INFORMATION);
3096 }
3097
3098 ConstantPool* constants = method_oop->constants();
3099 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3100
3101 // in the vm localvariable table representation, 6 consecutive elements in the table
3102 // represent a 6-tuple of shorts
3103 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3104 jint num_entries = method_oop->localvariable_table_length();
3105 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3106 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3107
3108 if (num_entries > 0) {
3109 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3110 for (int i = 0; i < num_entries; i++) {
3111 // get the 5 tuple information from the vm table
3112 jlocation start_location = (jlocation) table[i].start_bci;
3113 jint length = (jint) table[i].length;
3114 int name_index = (int) table[i].name_cp_index;
3115 int signature_index = (int) table[i].descriptor_cp_index;
3116 int generic_signature_index = (int) table[i].signature_cp_index;
3117 jint slot = (jint) table[i].slot;
3118
3119 // get utf8 name and signature
3120 char *name_buf = NULL;
3121 char *sig_buf = NULL;
3122 char *gen_sig_buf = NULL;
3123 {
3124 ResourceMark rm(current_thread);
3125
3126 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3127 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3128 strcpy(name_buf, utf8_name);
3129
3130 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3131 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3132 strcpy(sig_buf, utf8_signature);
3133
3134 if (generic_signature_index > 0) {
3135 const char *utf8_gen_sign = (const char *)
3136 constants->symbol_at(generic_signature_index)->as_utf8();
3137 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3138 strcpy(gen_sig_buf, utf8_gen_sign);
3139 }
3140 }
3141
3142 // fill in the jvmti local variable table
3143 jvmti_table[i].start_location = start_location;
3144 jvmti_table[i].length = length;
3145 jvmti_table[i].name = name_buf;
3146 jvmti_table[i].signature = sig_buf;
3147 jvmti_table[i].generic_signature = gen_sig_buf;
3148 jvmti_table[i].slot = slot;
3149 }
3150 }
3151
3152 // set results
3153 (*entry_count_ptr) = num_entries;
3154 (*table_ptr) = jvmti_table;
3155
3156 return JVMTI_ERROR_NONE;
3157 } /* end GetLocalVariableTable */
3158
3159
3160 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3161 // bytecode_count_ptr - pre-checked for NULL
3162 // bytecodes_ptr - pre-checked for NULL
3163 jvmtiError
3164 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3165 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3166
3167 HandleMark hm;
3168 methodHandle method(method_oop);
3169 jint size = (jint)method->code_size();
3170 jvmtiError err = allocate(size, bytecodes_ptr);
3171 if (err != JVMTI_ERROR_NONE) {
3172 return err;
3173 }
3174
3175 (*bytecode_count_ptr) = size;
3176 // get byte codes
3177 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3178
3179 return JVMTI_ERROR_NONE;
3180 } /* end GetBytecodes */
3181
3182
3183 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3184 // is_native_ptr - pre-checked for NULL
3185 jvmtiError
3186 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3187 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3188 (*is_native_ptr) = method_oop->is_native();
3189 return JVMTI_ERROR_NONE;
3190 } /* end IsMethodNative */
3191
3192
3193 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3194 // is_synthetic_ptr - pre-checked for NULL
3195 jvmtiError
3196 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3197 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3198 (*is_synthetic_ptr) = method_oop->is_synthetic();
3199 return JVMTI_ERROR_NONE;
3200 } /* end IsMethodSynthetic */
3201
3202
3203 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3204 // is_obsolete_ptr - pre-checked for NULL
3205 jvmtiError
3206 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3207 if (use_version_1_0_semantics() &&
3208 get_capabilities()->can_redefine_classes == 0) {
3209 // This JvmtiEnv requested version 1.0 semantics and this function
3210 // requires the can_redefine_classes capability in version 1.0 so
3211 // we need to return an error here.
3212 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3213 }
3214
3215 if (method_oop == NULL || method_oop->is_obsolete()) {
3216 *is_obsolete_ptr = true;
3217 } else {
3218 *is_obsolete_ptr = false;
3219 }
3220 return JVMTI_ERROR_NONE;
3221 } /* end IsMethodObsolete */
3222
3223 //
3224 // Raw Monitor functions
3225 //
3226
3227 // name - pre-checked for NULL
3228 // monitor_ptr - pre-checked for NULL
3229 jvmtiError
3230 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3231 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3232 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3233
3234 *monitor_ptr = (jrawMonitorID)rmonitor;
3235
3236 return JVMTI_ERROR_NONE;
3237 } /* end CreateRawMonitor */
3238
3239
3240 // rmonitor - pre-checked for validity
3241 jvmtiError
3242 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3243 if (Threads::number_of_threads() == 0) {
3244 // Remove this monitor from pending raw monitors list
3245 // if it has entered in onload or start phase.
3246 JvmtiPendingMonitors::destroy(rmonitor);
3247 } else {
3248 Thread* thread = Thread::current();
3249 if (rmonitor->is_entered(thread)) {
3250 // The caller owns this monitor which we are about to destroy.
3251 // We exit the underlying synchronization object so that the
3252 // "delete monitor" call below can work without an assertion
3253 // failure on systems that don't like destroying synchronization
3254 // objects that are locked.
3255 int r;
3256 intptr_t recursion = rmonitor->recursions();
3257 for (intptr_t i=0; i <= recursion; i++) {
3258 r = rmonitor->raw_exit(thread);
3259 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3260 if (r != ObjectMonitor::OM_OK) { // robustness
3261 return JVMTI_ERROR_INTERNAL;
3262 }
3263 }
3264 }
3265 if (rmonitor->owner() != NULL) {
3266 // The caller is trying to destroy a monitor that is locked by
3267 // someone else. While this is not forbidden by the JVMTI
3268 // spec, it will cause an assertion failure on systems that don't
3269 // like destroying synchronization objects that are locked.
3270 // We indicate a problem with the error return (and leak the
3271 // monitor's memory).
3272 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3273 }
3274 }
3275
3276 delete rmonitor;
3277
3278 return JVMTI_ERROR_NONE;
3279 } /* end DestroyRawMonitor */
3280
3281
3282 // rmonitor - pre-checked for validity
3283 jvmtiError
3284 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3285 if (Threads::number_of_threads() == 0) {
3286 // No JavaThreads exist so ObjectMonitor enter cannot be
3287 // used, add this raw monitor to the pending list.
3288 // The pending monitors will be actually entered when
3289 // the VM is setup.
3290 // See transition_pending_raw_monitors in create_vm()
3291 // in thread.cpp.
3292 JvmtiPendingMonitors::enter(rmonitor);
3293 } else {
3294 int r = 0;
3295 Thread* thread = Thread::current();
3296
3297 if (thread->is_Java_thread()) {
3298 JavaThread* current_thread = (JavaThread*)thread;
3299
3300 #ifdef PROPER_TRANSITIONS
3301 // Not really unknown but ThreadInVMfromNative does more than we want
3302 ThreadInVMfromUnknown __tiv;
3303 {
3304 ThreadBlockInVM __tbivm(current_thread);
3305 r = rmonitor->raw_enter(current_thread);
3306 }
3307 #else
3308 /* Transition to thread_blocked without entering vm state */
3309 /* This is really evil. Normally you can't undo _thread_blocked */
3310 /* transitions like this because it would cause us to miss a */
3311 /* safepoint but since the thread was already in _thread_in_native */
3312 /* the thread is not leaving a safepoint safe state and it will */
3313 /* block when it tries to return from native. We can't safepoint */
3314 /* block in here because we could deadlock the vmthread. Blech. */
3315
3316 JavaThreadState state = current_thread->thread_state();
3317 assert(state == _thread_in_native, "Must be _thread_in_native");
3318 // frame should already be walkable since we are in native
3319 assert(!current_thread->has_last_Java_frame() ||
3320 current_thread->frame_anchor()->walkable(), "Must be walkable");
3321 current_thread->set_thread_state(_thread_blocked);
3322
3323 r = rmonitor->raw_enter(current_thread);
3324 // restore state, still at a safepoint safe state
3325 current_thread->set_thread_state(state);
3326
3327 #endif /* PROPER_TRANSITIONS */
3328 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3329 } else {
3330 if (thread->is_Named_thread()) {
3331 r = rmonitor->raw_enter(thread);
3332 } else {
3333 ShouldNotReachHere();
3334 }
3335 }
3336
3337 if (r != ObjectMonitor::OM_OK) { // robustness
3338 return JVMTI_ERROR_INTERNAL;
3339 }
3340 }
3341 return JVMTI_ERROR_NONE;
3342 } /* end RawMonitorEnter */
3343
3344
3345 // rmonitor - pre-checked for validity
3346 jvmtiError
3347 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3348 jvmtiError err = JVMTI_ERROR_NONE;
3349
3350 if (Threads::number_of_threads() == 0) {
3351 // No JavaThreads exist so just remove this monitor from the pending list.
3352 // Bool value from exit is false if rmonitor is not in the list.
3353 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3354 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3355 }
3356 } else {
3357 int r = 0;
3358 Thread* thread = Thread::current();
3359
3360 if (thread->is_Java_thread()) {
3361 JavaThread* current_thread = (JavaThread*)thread;
3362 #ifdef PROPER_TRANSITIONS
3363 // Not really unknown but ThreadInVMfromNative does more than we want
3364 ThreadInVMfromUnknown __tiv;
3365 #endif /* PROPER_TRANSITIONS */
3366 r = rmonitor->raw_exit(current_thread);
3367 } else {
3368 if (thread->is_Named_thread()) {
3369 r = rmonitor->raw_exit(thread);
3370 } else {
3371 ShouldNotReachHere();
3372 }
3373 }
3374
3375 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3376 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3377 } else {
3378 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3379 if (r != ObjectMonitor::OM_OK) { // robustness
3380 err = JVMTI_ERROR_INTERNAL;
3381 }
3382 }
3383 }
3384 return err;
3385 } /* end RawMonitorExit */
3386
3387
3388 // rmonitor - pre-checked for validity
3389 jvmtiError
3390 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3391 int r = 0;
3392 Thread* thread = Thread::current();
3393
3394 if (thread->is_Java_thread()) {
3395 JavaThread* current_thread = (JavaThread*)thread;
3396 #ifdef PROPER_TRANSITIONS
3397 // Not really unknown but ThreadInVMfromNative does more than we want
3398 ThreadInVMfromUnknown __tiv;
3399 {
3400 ThreadBlockInVM __tbivm(current_thread);
3401 r = rmonitor->raw_wait(millis, true, current_thread);
3402 }
3403 #else
3404 /* Transition to thread_blocked without entering vm state */
3405 /* This is really evil. Normally you can't undo _thread_blocked */
3406 /* transitions like this because it would cause us to miss a */
3407 /* safepoint but since the thread was already in _thread_in_native */
3408 /* the thread is not leaving a safepoint safe state and it will */
3409 /* block when it tries to return from native. We can't safepoint */
3410 /* block in here because we could deadlock the vmthread. Blech. */
3411
3412 JavaThreadState state = current_thread->thread_state();
3413 assert(state == _thread_in_native, "Must be _thread_in_native");
3414 // frame should already be walkable since we are in native
3415 assert(!current_thread->has_last_Java_frame() ||
3416 current_thread->frame_anchor()->walkable(), "Must be walkable");
3417 current_thread->set_thread_state(_thread_blocked);
3418
3419 r = rmonitor->raw_wait(millis, true, current_thread);
3420 // restore state, still at a safepoint safe state
3421 current_thread->set_thread_state(state);
3422
3423 #endif /* PROPER_TRANSITIONS */
3424 } else {
3425 if (thread->is_Named_thread()) {
3426 r = rmonitor->raw_wait(millis, true, thread);
3427 } else {
3428 ShouldNotReachHere();
3429 }
3430 }
3431
3432 switch (r) {
3433 case ObjectMonitor::OM_INTERRUPTED:
3434 return JVMTI_ERROR_INTERRUPT;
3435 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3436 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3437 }
3438 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3439 if (r != ObjectMonitor::OM_OK) { // robustness
3440 return JVMTI_ERROR_INTERNAL;
3441 }
3442
3443 return JVMTI_ERROR_NONE;
3444 } /* end RawMonitorWait */
3445
3446
3447 // rmonitor - pre-checked for validity
3448 jvmtiError
3449 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3450 int r = 0;
3451 Thread* thread = Thread::current();
3452
3453 if (thread->is_Java_thread()) {
3454 JavaThread* current_thread = (JavaThread*)thread;
3455 // Not really unknown but ThreadInVMfromNative does more than we want
3456 ThreadInVMfromUnknown __tiv;
3457 r = rmonitor->raw_notify(current_thread);
3458 } else {
3459 if (thread->is_Named_thread()) {
3460 r = rmonitor->raw_notify(thread);
3461 } else {
3462 ShouldNotReachHere();
3463 }
3464 }
3465
3466 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3467 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3468 }
3469 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3470 if (r != ObjectMonitor::OM_OK) { // robustness
3471 return JVMTI_ERROR_INTERNAL;
3472 }
3473
3474 return JVMTI_ERROR_NONE;
3475 } /* end RawMonitorNotify */
3476
3477
3478 // rmonitor - pre-checked for validity
3479 jvmtiError
3480 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3481 int r = 0;
3482 Thread* thread = Thread::current();
3483
3484 if (thread->is_Java_thread()) {
3485 JavaThread* current_thread = (JavaThread*)thread;
3486 ThreadInVMfromUnknown __tiv;
3487 r = rmonitor->raw_notifyAll(current_thread);
3488 } else {
3489 if (thread->is_Named_thread()) {
3490 r = rmonitor->raw_notifyAll(thread);
3491 } else {
3492 ShouldNotReachHere();
3493 }
3494 }
3495
3496 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3497 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3498 }
3499 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3500 if (r != ObjectMonitor::OM_OK) { // robustness
3501 return JVMTI_ERROR_INTERNAL;
3502 }
3503
3504 return JVMTI_ERROR_NONE;
3505 } /* end RawMonitorNotifyAll */
3506
3507
3508 //
3509 // JNI Function Interception functions
3510 //
3511
3512
3513 // function_table - pre-checked for NULL
3514 jvmtiError
3515 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3516 // Copy jni function table at safepoint.
3517 VM_JNIFunctionTableCopier copier(function_table);
3518 VMThread::execute(&copier);
3519
3520 return JVMTI_ERROR_NONE;
3521 } /* end SetJNIFunctionTable */
3522
3523
3524 // function_table - pre-checked for NULL
3525 jvmtiError
3526 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3527 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3528 if (*function_table == NULL)
3529 return JVMTI_ERROR_OUT_OF_MEMORY;
3530 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3531 return JVMTI_ERROR_NONE;
3532 } /* end GetJNIFunctionTable */
3533
3534
3535 //
3536 // Event Management functions
3537 //
3538
3539 jvmtiError
3540 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3541 // can only generate two event types
3542 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3543 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3544 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3545 }
3546
3547 // for compiled_method_load events we must check that the environment
3548 // has the can_generate_compiled_method_load_events capability.
3549 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3550 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3551 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3552 }
3553 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3554 } else {
3555 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3556 }
3557
3558 } /* end GenerateEvents */
3559
3560
3561 //
3562 // Extension Mechanism functions
3563 //
3564
3565 // extension_count_ptr - pre-checked for NULL
3566 // extensions - pre-checked for NULL
3567 jvmtiError
3568 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3569 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3570 } /* end GetExtensionFunctions */
3571
3572
3573 // extension_count_ptr - pre-checked for NULL
3574 // extensions - pre-checked for NULL
3575 jvmtiError
3576 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3577 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3578 } /* end GetExtensionEvents */
3579
3580
3581 // callback - NULL is a valid value, must be checked
3582 jvmtiError
3583 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3584 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3585 } /* end SetExtensionEventCallback */
3586
3587 //
3588 // Timers functions
3589 //
3590
3591 // info_ptr - pre-checked for NULL
3592 jvmtiError
3593 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3594 os::current_thread_cpu_time_info(info_ptr);
3595 return JVMTI_ERROR_NONE;
3596 } /* end GetCurrentThreadCpuTimerInfo */
3597
3598
3599 // nanos_ptr - pre-checked for NULL
3600 jvmtiError
3601 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3602 *nanos_ptr = os::current_thread_cpu_time();
3603 return JVMTI_ERROR_NONE;
3604 } /* end GetCurrentThreadCpuTime */
3605
3606
3607 // info_ptr - pre-checked for NULL
3608 jvmtiError
3609 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3610 os::thread_cpu_time_info(info_ptr);
3611 return JVMTI_ERROR_NONE;
3612 } /* end GetThreadCpuTimerInfo */
3613
3614
3615 // Threads_lock NOT held, java_thread not protected by lock
3616 // java_thread - pre-checked
3617 // nanos_ptr - pre-checked for NULL
3618 jvmtiError
3619 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3620 *nanos_ptr = os::thread_cpu_time(java_thread);
3621 return JVMTI_ERROR_NONE;
3622 } /* end GetThreadCpuTime */
3623
3624
3625 // info_ptr - pre-checked for NULL
3626 jvmtiError
3627 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3628 os::javaTimeNanos_info(info_ptr);
3629 return JVMTI_ERROR_NONE;
3630 } /* end GetTimerInfo */
3631
3632
3633 // nanos_ptr - pre-checked for NULL
3634 jvmtiError
3635 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3636 *nanos_ptr = os::javaTimeNanos();
3637 return JVMTI_ERROR_NONE;
3638 } /* end GetTime */
3639
3640
3641 // processor_count_ptr - pre-checked for NULL
3642 jvmtiError
3643 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3644 *processor_count_ptr = os::active_processor_count();
3645 return JVMTI_ERROR_NONE;
3646 } /* end GetAvailableProcessors */
3647
3648 jvmtiError
3649 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3650 if (sampling_interval < 0) {
3651 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3652 }
3653 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3654 return JVMTI_ERROR_NONE;
3655 } /* end SetHeapSamplingInterval */
3656
3657 //
3658 // System Properties functions
3659 //
3660
3661 // count_ptr - pre-checked for NULL
3662 // property_ptr - pre-checked for NULL
3663 jvmtiError
3664 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3665 jvmtiError err = JVMTI_ERROR_NONE;
3666
3667 // Get the number of readable properties.
3668 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3669
3670 // Allocate memory to hold the exact number of readable properties.
3671 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3672 if (err != JVMTI_ERROR_NONE) {
3673 return err;
3674 }
3675 int readable_count = 0;
3676 // Loop through the system properties until all the readable properties are found.
3677 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3678 if (p->is_readable()) {
3679 const char *key = p->key();
3680 char **tmp_value = *property_ptr+readable_count;
3681 readable_count++;
3682 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3683 if (err == JVMTI_ERROR_NONE) {
3684 strcpy(*tmp_value, key);
3685 } else {
3686 // clean up previously allocated memory.
3687 for (int j=0; j<readable_count; j++) {
3688 Deallocate((unsigned char*)*property_ptr+j);
3689 }
3690 Deallocate((unsigned char*)property_ptr);
3691 break;
3692 }
3693 }
3694 }
3695 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3696 return err;
3697 } /* end GetSystemProperties */
3698
3699
3700 // property - pre-checked for NULL
3701 // value_ptr - pre-checked for NULL
3702 jvmtiError
3703 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3704 jvmtiError err = JVMTI_ERROR_NONE;
3705 const char *value;
3706
3707 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3708 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3709 if (value == NULL) {
3710 err = JVMTI_ERROR_NOT_AVAILABLE;
3711 } else {
3712 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3713 if (err == JVMTI_ERROR_NONE) {
3714 strcpy(*value_ptr, value);
3715 }
3716 }
3717 return err;
3718 } /* end GetSystemProperty */
3719
3720
3721 // property - pre-checked for NULL
3722 // value - NULL is a valid value, must be checked
3723 jvmtiError
3724 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3725 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3726
3727 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3728 if (strcmp(property, p->key()) == 0) {
3729 if (p->set_writeable_value(value_ptr)) {
3730 err = JVMTI_ERROR_NONE;
3731 }
3732 }
3733 }
3734 return err;
3735 } /* end SetSystemProperty */