1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/modules.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "interpreter/bytecodeStream.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvmtifiles/jvmtiEnv.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jniCheck.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "prims/jvmtiAgentThread.hpp"
45 #include "prims/jvmtiClassFileReconstituter.hpp"
46 #include "prims/jvmtiCodeBlobEvents.hpp"
47 #include "prims/jvmtiExtensions.hpp"
48 #include "prims/jvmtiGetLoadedClasses.hpp"
49 #include "prims/jvmtiImpl.hpp"
50 #include "prims/jvmtiManageCapabilities.hpp"
51 #include "prims/jvmtiRawMonitor.hpp"
52 #include "prims/jvmtiRedefineClasses.hpp"
53 #include "prims/jvmtiTagMap.hpp"
54 #include "prims/jvmtiThreadState.inline.hpp"
55 #include "prims/jvmtiUtil.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/interfaceSupport.inline.hpp"
59 #include "runtime/javaCalls.hpp"
60 #include "runtime/jfieldIDWorkaround.hpp"
61 #include "runtime/jniHandles.inline.hpp"
62 #include "runtime/objectMonitor.inline.hpp"
63 #include "runtime/osThread.hpp"
64 #include "runtime/reflectionUtils.hpp"
65 #include "runtime/signature.hpp"
66 #include "runtime/thread.inline.hpp"
67 #include "runtime/threadHeapSampler.hpp"
68 #include "runtime/threadSMR.hpp"
69 #include "runtime/timerTrace.hpp"
70 #include "runtime/vframe.inline.hpp"
71 #include "runtime/vmThread.hpp"
72 #include "services/threadService.hpp"
73 #include "utilities/exceptions.hpp"
74 #include "utilities/preserveException.hpp"
75
76
77 #define FIXLATER 0 // REMOVE this when completed.
78
79 // FIXLATER: hook into JvmtiTrace
80 #define TraceJVMTICalls false
81
82 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
83 }
84
85 JvmtiEnv::~JvmtiEnv() {
86 }
87
88 JvmtiEnv*
89 JvmtiEnv::create_a_jvmti(jint version) {
90 return new JvmtiEnv(version);
91 }
92
93 // VM operation class to copy jni function table at safepoint.
94 // More than one java threads or jvmti agents may be reading/
95 // modifying jni function tables. To reduce the risk of bad
96 // interaction b/w these threads it is copied at safepoint.
97 class VM_JNIFunctionTableCopier : public VM_Operation {
98 private:
99 const struct JNINativeInterface_ *_function_table;
100 public:
101 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
102 _function_table = func_tbl;
103 };
104
105 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
106 void doit() {
107 copy_jni_function_table(_function_table);
108 };
109 };
110
111 //
112 // Do not change the "prefix" marker below, everything above it is copied
113 // unchanged into the filled stub, everything below is controlled by the
114 // stub filler (only method bodies are carried forward, and then only for
115 // functionality still in the spec).
116 //
117 // end file prefix
118
119 //
120 // Memory Management functions
121 //
122
123 // mem_ptr - pre-checked for NULL
124 jvmtiError
125 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
126 return allocate(size, mem_ptr);
127 } /* end Allocate */
128
129
130 // mem - NULL is a valid value, must be checked
131 jvmtiError
132 JvmtiEnv::Deallocate(unsigned char* mem) {
133 return deallocate(mem);
134 } /* end Deallocate */
135
136 // Threads_lock NOT held, java_thread not protected by lock
137 // java_thread - pre-checked
138 // data - NULL is a valid value, must be checked
139 jvmtiError
140 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
141 JvmtiThreadState* state = java_thread->jvmti_thread_state();
142 if (state == NULL) {
143 if (data == NULL) {
144 // leaving state unset same as data set to NULL
145 return JVMTI_ERROR_NONE;
146 }
147 // otherwise, create the state
148 state = JvmtiThreadState::state_for(java_thread);
149 if (state == NULL) {
150 return JVMTI_ERROR_THREAD_NOT_ALIVE;
151 }
152 }
153 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
154 return JVMTI_ERROR_NONE;
155 } /* end SetThreadLocalStorage */
156
157
158 // Threads_lock NOT held
159 // thread - NOT pre-checked
160 // data_ptr - pre-checked for NULL
161 jvmtiError
162 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
163 JavaThread* current_thread = JavaThread::current();
164 if (thread == NULL) {
165 JvmtiThreadState* state = current_thread->jvmti_thread_state();
166 *data_ptr = (state == NULL) ? NULL :
167 state->env_thread_state(this)->get_agent_thread_local_storage_data();
168 } else {
169 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
170 // the thread to _thread_in_vm. However, when the TLS for a thread
171 // other than the current thread is required we need to transition
172 // from native so as to resolve the jthread.
173
174 ThreadInVMfromNative __tiv(current_thread);
175 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
176 debug_only(VMNativeEntryWrapper __vew;)
177
178 JavaThread* java_thread = NULL;
179 ThreadsListHandle tlh(current_thread);
180 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
181 if (err != JVMTI_ERROR_NONE) {
182 return err;
183 }
184
185 JvmtiThreadState* state = java_thread->jvmti_thread_state();
186 *data_ptr = (state == NULL) ? NULL :
187 state->env_thread_state(this)->get_agent_thread_local_storage_data();
188 }
189 return JVMTI_ERROR_NONE;
190 } /* end GetThreadLocalStorage */
191
192 //
193 // Module functions
194 //
195
196 // module_count_ptr - pre-checked for NULL
197 // modules_ptr - pre-checked for NULL
198 jvmtiError
199 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
200 JvmtiModuleClosure jmc;
201
202 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
203 } /* end GetAllModules */
204
205
206 // class_loader - NULL is a valid value, must be pre-checked
207 // package_name - pre-checked for NULL
208 // module_ptr - pre-checked for NULL
209 jvmtiError
210 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
211 JavaThread* THREAD = JavaThread::current(); // pass to macros
212 ResourceMark rm(THREAD);
213
214 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
215 // Check that loader is a subclass of java.lang.ClassLoader.
216 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
217 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
218 }
219 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
220 if (HAS_PENDING_EXCEPTION) {
221 CLEAR_PENDING_EXCEPTION;
222 return JVMTI_ERROR_INTERNAL; // unexpected exception
223 }
224 *module_ptr = module;
225 return JVMTI_ERROR_NONE;
226 } /* end GetNamedModule */
227
228
229 // module - pre-checked for NULL
230 // to_module - pre-checked for NULL
231 jvmtiError
232 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
233 JavaThread* THREAD = JavaThread::current();
234
235 // check module
236 Handle h_module(THREAD, JNIHandles::resolve(module));
237 if (!java_lang_Module::is_instance(h_module())) {
238 return JVMTI_ERROR_INVALID_MODULE;
239 }
240 // check to_module
241 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
242 if (!java_lang_Module::is_instance(h_to_module())) {
243 return JVMTI_ERROR_INVALID_MODULE;
244 }
245 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
246 } /* end AddModuleReads */
247
248
249 // module - pre-checked for NULL
250 // pkg_name - pre-checked for NULL
251 // to_module - pre-checked for NULL
252 jvmtiError
253 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
254 JavaThread* THREAD = JavaThread::current();
255 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
256
257 // check module
258 Handle h_module(THREAD, JNIHandles::resolve(module));
259 if (!java_lang_Module::is_instance(h_module())) {
260 return JVMTI_ERROR_INVALID_MODULE;
261 }
262 // check to_module
263 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
264 if (!java_lang_Module::is_instance(h_to_module())) {
265 return JVMTI_ERROR_INVALID_MODULE;
266 }
267 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
268 } /* end AddModuleExports */
269
270
271 // module - pre-checked for NULL
272 // pkg_name - pre-checked for NULL
273 // to_module - pre-checked for NULL
274 jvmtiError
275 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
276 JavaThread* THREAD = JavaThread::current();
277 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
278
279 // check module
280 Handle h_module(THREAD, JNIHandles::resolve(module));
281 if (!java_lang_Module::is_instance(h_module())) {
282 return JVMTI_ERROR_INVALID_MODULE;
283 }
284 // check to_module
285 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
286 if (!java_lang_Module::is_instance(h_to_module())) {
287 return JVMTI_ERROR_INVALID_MODULE;
288 }
289 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
290 } /* end AddModuleOpens */
291
292
293 // module - pre-checked for NULL
294 // service - pre-checked for NULL
295 jvmtiError
296 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
297 JavaThread* THREAD = JavaThread::current();
298
299 // check module
300 Handle h_module(THREAD, JNIHandles::resolve(module));
301 if (!java_lang_Module::is_instance(h_module())) {
302 return JVMTI_ERROR_INVALID_MODULE;
303 }
304 // check service
305 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
306 if (!java_lang_Class::is_instance(h_service()) ||
307 java_lang_Class::is_primitive(h_service())) {
308 return JVMTI_ERROR_INVALID_CLASS;
309 }
310 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
311 } /* end AddModuleUses */
312
313
314 // module - pre-checked for NULL
315 // service - pre-checked for NULL
316 // impl_class - pre-checked for NULL
317 jvmtiError
318 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
319 JavaThread* THREAD = JavaThread::current();
320
321 // check module
322 Handle h_module(THREAD, JNIHandles::resolve(module));
323 if (!java_lang_Module::is_instance(h_module())) {
324 return JVMTI_ERROR_INVALID_MODULE;
325 }
326 // check service
327 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
328 if (!java_lang_Class::is_instance(h_service()) ||
329 java_lang_Class::is_primitive(h_service())) {
330 return JVMTI_ERROR_INVALID_CLASS;
331 }
332 // check impl_class
333 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
334 if (!java_lang_Class::is_instance(h_impl_class()) ||
335 java_lang_Class::is_primitive(h_impl_class())) {
336 return JVMTI_ERROR_INVALID_CLASS;
337 }
338 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
339 } /* end AddModuleProvides */
340
341 // module - pre-checked for NULL
342 // is_modifiable_class_ptr - pre-checked for NULL
343 jvmtiError
344 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
345 JavaThread* THREAD = JavaThread::current();
346
347 // check module
348 Handle h_module(THREAD, JNIHandles::resolve(module));
349 if (!java_lang_Module::is_instance(h_module())) {
350 return JVMTI_ERROR_INVALID_MODULE;
351 }
352
353 *is_modifiable_module_ptr = JNI_TRUE;
354 return JVMTI_ERROR_NONE;
355 } /* end IsModifiableModule */
356
357
358 //
359 // Class functions
360 //
361
362 // class_count_ptr - pre-checked for NULL
363 // classes_ptr - pre-checked for NULL
364 jvmtiError
365 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
366 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
367 } /* end GetLoadedClasses */
368
369
370 // initiating_loader - NULL is a valid value, must be checked
371 // class_count_ptr - pre-checked for NULL
372 // classes_ptr - pre-checked for NULL
373 jvmtiError
374 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
375 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
376 class_count_ptr, classes_ptr);
377 } /* end GetClassLoaderClasses */
378
379 // k_mirror - may be primitive, this must be checked
380 // is_modifiable_class_ptr - pre-checked for NULL
381 jvmtiError
382 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
383 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
384 JNI_TRUE : JNI_FALSE;
385 return JVMTI_ERROR_NONE;
386 } /* end IsModifiableClass */
387
388 // class_count - pre-checked to be greater than or equal to 0
389 // classes - pre-checked for NULL
390 jvmtiError
391 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
392 //TODO: add locking
393
394 int index;
395 JavaThread* current_thread = JavaThread::current();
396 ResourceMark rm(current_thread);
397
398 jvmtiClassDefinition* class_definitions =
399 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
400 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
401
402 for (index = 0; index < class_count; index++) {
403 HandleMark hm(current_thread);
404
405 jclass jcls = classes[index];
406 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
407 if (k_mirror == NULL) {
408 return JVMTI_ERROR_INVALID_CLASS;
409 }
410 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
411 return JVMTI_ERROR_INVALID_CLASS;
412 }
413
414 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
415 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
416 }
417
418 Klass* klass = java_lang_Class::as_Klass(k_mirror);
419
420 jint status = klass->jvmti_class_status();
421 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
422 return JVMTI_ERROR_INVALID_CLASS;
423 }
424
425 InstanceKlass* ik = InstanceKlass::cast(klass);
426 if (ik->get_cached_class_file_bytes() == NULL) {
427 // Not cached, we need to reconstitute the class file from the
428 // VM representation. We don't attach the reconstituted class
429 // bytes to the InstanceKlass here because they have not been
430 // validated and we're not at a safepoint.
431 JvmtiClassFileReconstituter reconstituter(ik);
432 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
433 return reconstituter.get_error();
434 }
435
436 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
437 class_definitions[index].class_bytes = (unsigned char*)
438 reconstituter.class_file_bytes();
439 } else {
440 // it is cached, get it from the cache
441 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
442 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
443 }
444 class_definitions[index].klass = jcls;
445 }
446 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
447 VMThread::execute(&op);
448 return (op.check_error());
449 } /* end RetransformClasses */
450
451
452 // class_count - pre-checked to be greater than or equal to 0
453 // class_definitions - pre-checked for NULL
454 jvmtiError
455 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
456 //TODO: add locking
457 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
458 VMThread::execute(&op);
459 return (op.check_error());
460 } /* end RedefineClasses */
461
462
463 //
464 // Object functions
465 //
466
467 // size_ptr - pre-checked for NULL
468 jvmtiError
469 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
470 oop mirror = JNIHandles::resolve_external_guard(object);
471 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
472 *size_ptr = (jlong)mirror->size() * wordSize;
473 return JVMTI_ERROR_NONE;
474 } /* end GetObjectSize */
475
476 //
477 // Method functions
478 //
479
480 // prefix - NULL is a valid value, must be checked
481 jvmtiError
482 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
483 return prefix == NULL?
484 SetNativeMethodPrefixes(0, NULL) :
485 SetNativeMethodPrefixes(1, (char**)&prefix);
486 } /* end SetNativeMethodPrefix */
487
488
489 // prefix_count - pre-checked to be greater than or equal to 0
490 // prefixes - pre-checked for NULL
491 jvmtiError
492 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
493 // Have to grab JVMTI thread state lock to be sure that some thread
494 // isn't accessing the prefixes at the same time we are setting them.
495 // No locks during VM bring-up.
496 if (Threads::number_of_threads() == 0) {
497 return set_native_method_prefixes(prefix_count, prefixes);
498 } else {
499 MutexLocker mu(JvmtiThreadState_lock);
500 return set_native_method_prefixes(prefix_count, prefixes);
501 }
502 } /* end SetNativeMethodPrefixes */
503
504 //
505 // Event Management functions
506 //
507
508 // callbacks - NULL is a valid value, must be checked
509 // size_of_callbacks - pre-checked to be greater than or equal to 0
510 jvmtiError
511 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
512 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
513 return JVMTI_ERROR_NONE;
514 } /* end SetEventCallbacks */
515
516
517 // event_thread - NULL is a valid value, must be checked
518 jvmtiError
519 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
520 if (event_thread == NULL) {
521 // Can be called at Agent_OnLoad() time with event_thread == NULL
522 // when Thread::current() does not work yet so we cannot create a
523 // ThreadsListHandle that is common to both thread-specific and
524 // global code paths.
525
526 // event_type must be valid
527 if (!JvmtiEventController::is_valid_event_type(event_type)) {
528 return JVMTI_ERROR_INVALID_EVENT_TYPE;
529 }
530
531 bool enabled = (mode == JVMTI_ENABLE);
532
533 // assure that needed capabilities are present
534 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
535 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
536 }
537
538 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
539 record_class_file_load_hook_enabled();
540 }
541
542 if (event_type == JVMTI_EVENT_SAMPLED_OBJECT_ALLOC) {
543 if (enabled) {
544 ThreadHeapSampler::enable();
545 } else {
546 ThreadHeapSampler::disable();
547 }
548 }
549 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
550 } else {
551 // We have a specified event_thread.
552
553 JavaThread* java_thread = NULL;
554 ThreadsListHandle tlh;
555 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
556 if (err != JVMTI_ERROR_NONE) {
557 return err;
558 }
559
560 // event_type must be valid
561 if (!JvmtiEventController::is_valid_event_type(event_type)) {
562 return JVMTI_ERROR_INVALID_EVENT_TYPE;
563 }
564
565 // global events cannot be controlled at thread level.
566 if (JvmtiEventController::is_global_event(event_type)) {
567 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
568 }
569
570 bool enabled = (mode == JVMTI_ENABLE);
571
572 // assure that needed capabilities are present
573 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
574 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
575 }
576
577 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
578 record_class_file_load_hook_enabled();
579 }
580
581 if (event_type == JVMTI_EVENT_SAMPLED_OBJECT_ALLOC) {
582 if (enabled) {
583 ThreadHeapSampler::enable();
584 } else {
585 ThreadHeapSampler::disable();
586 }
587 }
588 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
589 }
590
591 return JVMTI_ERROR_NONE;
592 } /* end SetEventNotificationMode */
593
594 //
595 // Capability functions
596 //
597
598 // capabilities_ptr - pre-checked for NULL
599 jvmtiError
600 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
601 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
602 get_prohibited_capabilities(),
603 capabilities_ptr);
604 return JVMTI_ERROR_NONE;
605 } /* end GetPotentialCapabilities */
606
607
608 // capabilities_ptr - pre-checked for NULL
609 jvmtiError
610 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
611 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
612 get_prohibited_capabilities(),
613 capabilities_ptr,
614 get_capabilities());
615 } /* end AddCapabilities */
616
617
618 // capabilities_ptr - pre-checked for NULL
619 jvmtiError
620 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
621 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
622 return JVMTI_ERROR_NONE;
623 } /* end RelinquishCapabilities */
624
625
626 // capabilities_ptr - pre-checked for NULL
627 jvmtiError
628 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
629 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
630 return JVMTI_ERROR_NONE;
631 } /* end GetCapabilities */
632
633 //
634 // Class Loader Search functions
635 //
636
637 // segment - pre-checked for NULL
638 jvmtiError
639 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
640 jvmtiPhase phase = get_phase();
641 if (phase == JVMTI_PHASE_ONLOAD) {
642 Arguments::append_sysclasspath(segment);
643 return JVMTI_ERROR_NONE;
644 } else if (use_version_1_0_semantics()) {
645 // This JvmtiEnv requested version 1.0 semantics and this function
646 // is only allowed in the ONLOAD phase in version 1.0 so we need to
647 // return an error here.
648 return JVMTI_ERROR_WRONG_PHASE;
649 } else if (phase == JVMTI_PHASE_LIVE) {
650 // The phase is checked by the wrapper that called this function,
651 // but this thread could be racing with the thread that is
652 // terminating the VM so we check one more time.
653
654 // create the zip entry
655 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
656 if (zip_entry == NULL) {
657 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
658 }
659
660 // lock the loader
661 Thread* thread = Thread::current();
662 HandleMark hm;
663 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
664
665 ObjectLocker ol(loader_lock, thread);
666
667 // add the jar file to the bootclasspath
668 log_info(class, load)("opened: %s", zip_entry->name());
669 ClassLoaderExt::append_boot_classpath(zip_entry);
670 return JVMTI_ERROR_NONE;
671 } else {
672 return JVMTI_ERROR_WRONG_PHASE;
673 }
674
675 } /* end AddToBootstrapClassLoaderSearch */
676
677
678 // segment - pre-checked for NULL
679 jvmtiError
680 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
681 jvmtiPhase phase = get_phase();
682
683 if (phase == JVMTI_PHASE_ONLOAD) {
684 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
685 if (strcmp("java.class.path", p->key()) == 0) {
686 p->append_value(segment);
687 break;
688 }
689 }
690 return JVMTI_ERROR_NONE;
691 } else if (phase == JVMTI_PHASE_LIVE) {
692 // The phase is checked by the wrapper that called this function,
693 // but this thread could be racing with the thread that is
694 // terminating the VM so we check one more time.
695 HandleMark hm;
696
697 // create the zip entry (which will open the zip file and hence
698 // check that the segment is indeed a zip file).
699 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
700 if (zip_entry == NULL) {
701 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
702 }
703 delete zip_entry; // no longer needed
704
705 // lock the loader
706 Thread* THREAD = Thread::current();
707 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
708
709 ObjectLocker ol(loader, THREAD);
710
711 // need the path as java.lang.String
712 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
713 if (HAS_PENDING_EXCEPTION) {
714 CLEAR_PENDING_EXCEPTION;
715 return JVMTI_ERROR_INTERNAL;
716 }
717
718 // Invoke the appendToClassPathForInstrumentation method - if the method
719 // is not found it means the loader doesn't support adding to the class path
720 // in the live phase.
721 {
722 JavaValue res(T_VOID);
723 JavaCalls::call_special(&res,
724 loader,
725 loader->klass(),
726 vmSymbols::appendToClassPathForInstrumentation_name(),
727 vmSymbols::appendToClassPathForInstrumentation_signature(),
728 path,
729 THREAD);
730 if (HAS_PENDING_EXCEPTION) {
731 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
732 CLEAR_PENDING_EXCEPTION;
733
734 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
735 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
736 } else {
737 return JVMTI_ERROR_INTERNAL;
738 }
739 }
740 }
741
742 return JVMTI_ERROR_NONE;
743 } else {
744 return JVMTI_ERROR_WRONG_PHASE;
745 }
746 } /* end AddToSystemClassLoaderSearch */
747
748 //
749 // General functions
750 //
751
752 // phase_ptr - pre-checked for NULL
753 jvmtiError
754 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
755 *phase_ptr = phase();
756 return JVMTI_ERROR_NONE;
757 } /* end GetPhase */
758
759
760 jvmtiError
761 JvmtiEnv::DisposeEnvironment() {
762 dispose();
763 return JVMTI_ERROR_NONE;
764 } /* end DisposeEnvironment */
765
766
767 // data - NULL is a valid value, must be checked
768 jvmtiError
769 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
770 set_env_local_storage(data);
771 return JVMTI_ERROR_NONE;
772 } /* end SetEnvironmentLocalStorage */
773
774
775 // data_ptr - pre-checked for NULL
776 jvmtiError
777 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
778 *data_ptr = (void*)get_env_local_storage();
779 return JVMTI_ERROR_NONE;
780 } /* end GetEnvironmentLocalStorage */
781
782 // version_ptr - pre-checked for NULL
783 jvmtiError
784 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
785 *version_ptr = JVMTI_VERSION;
786 return JVMTI_ERROR_NONE;
787 } /* end GetVersionNumber */
788
789
790 // name_ptr - pre-checked for NULL
791 jvmtiError
792 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
793 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
794 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
795 }
796 const char *name = JvmtiUtil::error_name(error);
797 if (name == NULL) {
798 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
799 }
800 size_t len = strlen(name) + 1;
801 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
802 if (err == JVMTI_ERROR_NONE) {
803 memcpy(*name_ptr, name, len);
804 }
805 return err;
806 } /* end GetErrorName */
807
808
809 jvmtiError
810 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
811 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
812 switch (flag) {
813 case JVMTI_VERBOSE_OTHER:
814 // ignore
815 break;
816 case JVMTI_VERBOSE_CLASS:
817 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
818 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
819 break;
820 case JVMTI_VERBOSE_GC:
821 if (value == 0) {
822 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
823 } else {
824 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
825 }
826 break;
827 case JVMTI_VERBOSE_JNI:
828 PrintJNIResolving = value != 0;
829 break;
830 default:
831 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
832 };
833 return JVMTI_ERROR_NONE;
834 } /* end SetVerboseFlag */
835
836
837 // format_ptr - pre-checked for NULL
838 jvmtiError
839 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
840 *format_ptr = JVMTI_JLOCATION_JVMBCI;
841 return JVMTI_ERROR_NONE;
842 } /* end GetJLocationFormat */
843
844 //
845 // Thread functions
846 //
847
848 // Threads_lock NOT held
849 // thread - NOT pre-checked
850 // thread_state_ptr - pre-checked for NULL
851 jvmtiError
852 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
853 JavaThread* current_thread = JavaThread::current();
854 JavaThread* java_thread = NULL;
855 oop thread_oop = NULL;
856 ThreadsListHandle tlh(current_thread);
857
858 if (thread == NULL) {
859 java_thread = current_thread;
860 thread_oop = java_thread->threadObj();
861
862 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
863 return JVMTI_ERROR_INVALID_THREAD;
864 }
865 } else {
866 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
867 if (err != JVMTI_ERROR_NONE) {
868 // We got an error code so we don't have a JavaThread *, but
869 // only return an error from here if we didn't get a valid
870 // thread_oop.
871 if (thread_oop == NULL) {
872 return err;
873 }
874 // We have a valid thread_oop so we can return some thread state.
875 }
876 }
877
878 // get most state bits
879 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
880
881 if (java_thread != NULL) {
882 // We have a JavaThread* so add more state bits.
883 JavaThreadState jts = java_thread->thread_state();
884
885 if (java_thread->is_being_ext_suspended()) {
886 state |= JVMTI_THREAD_STATE_SUSPENDED;
887 }
888 if (jts == _thread_in_native) {
889 state |= JVMTI_THREAD_STATE_IN_NATIVE;
890 }
891 OSThread* osThread = java_thread->osthread();
892 if (osThread != NULL && osThread->interrupted()) {
893 state |= JVMTI_THREAD_STATE_INTERRUPTED;
894 }
895 }
896
897 *thread_state_ptr = state;
898 return JVMTI_ERROR_NONE;
899 } /* end GetThreadState */
900
901
902 // thread_ptr - pre-checked for NULL
903 jvmtiError
904 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
905 JavaThread* current_thread = JavaThread::current();
906 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
907 return JVMTI_ERROR_NONE;
908 } /* end GetCurrentThread */
909
910
911 // threads_count_ptr - pre-checked for NULL
912 // threads_ptr - pre-checked for NULL
913 jvmtiError
914 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
915 int nthreads = 0;
916 Handle *thread_objs = NULL;
917 ResourceMark rm;
918 HandleMark hm;
919
920 // enumerate threads (including agent threads)
921 ThreadsListEnumerator tle(Thread::current(), true);
922 nthreads = tle.num_threads();
923 *threads_count_ptr = nthreads;
924
925 if (nthreads == 0) {
926 *threads_ptr = NULL;
927 return JVMTI_ERROR_NONE;
928 }
929
930 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
931 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
932
933 for (int i=0; i < nthreads; i++) {
934 thread_objs[i] = Handle(tle.get_threadObj(i));
935 }
936
937 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
938 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
939
940 *threads_ptr = jthreads;
941 return JVMTI_ERROR_NONE;
942 } /* end GetAllThreads */
943
944
945 // Threads_lock NOT held, java_thread not protected by lock
946 // java_thread - pre-checked
947 jvmtiError
948 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
949 // don't allow hidden thread suspend request.
950 if (java_thread->is_hidden_from_external_view()) {
951 return (JVMTI_ERROR_NONE);
952 }
953
954 {
955 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
956 if (java_thread->is_external_suspend()) {
957 // don't allow nested external suspend requests.
958 return (JVMTI_ERROR_THREAD_SUSPENDED);
959 }
960 if (java_thread->is_exiting()) { // thread is in the process of exiting
961 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
962 }
963 java_thread->set_external_suspend();
964 }
965
966 if (!JvmtiSuspendControl::suspend(java_thread)) {
967 // the thread was in the process of exiting
968 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
969 }
970 return JVMTI_ERROR_NONE;
971 } /* end SuspendThread */
972
973
974 // request_count - pre-checked to be greater than or equal to 0
975 // request_list - pre-checked for NULL
976 // results - pre-checked for NULL
977 jvmtiError
978 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
979 int needSafepoint = 0; // > 0 if we need a safepoint
980 ThreadsListHandle tlh;
981 for (int i = 0; i < request_count; i++) {
982 JavaThread *java_thread = NULL;
983 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
984 if (err != JVMTI_ERROR_NONE) {
985 results[i] = err;
986 continue;
987 }
988 // don't allow hidden thread suspend request.
989 if (java_thread->is_hidden_from_external_view()) {
990 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
991 continue;
992 }
993
994 {
995 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
996 if (java_thread->is_external_suspend()) {
997 // don't allow nested external suspend requests.
998 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
999 continue;
1000 }
1001 if (java_thread->is_exiting()) { // thread is in the process of exiting
1002 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1003 continue;
1004 }
1005 java_thread->set_external_suspend();
1006 }
1007 if (java_thread->thread_state() == _thread_in_native) {
1008 // We need to try and suspend native threads here. Threads in
1009 // other states will self-suspend on their next transition.
1010 if (!JvmtiSuspendControl::suspend(java_thread)) {
1011 // The thread was in the process of exiting. Force another
1012 // safepoint to make sure that this thread transitions.
1013 needSafepoint++;
1014 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1015 continue;
1016 }
1017 } else {
1018 needSafepoint++;
1019 }
1020 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1021 }
1022 if (needSafepoint > 0) {
1023 VM_ThreadsSuspendJVMTI tsj;
1024 VMThread::execute(&tsj);
1025 }
1026 // per-thread suspend results returned via results parameter
1027 return JVMTI_ERROR_NONE;
1028 } /* end SuspendThreadList */
1029
1030
1031 // Threads_lock NOT held, java_thread not protected by lock
1032 // java_thread - pre-checked
1033 jvmtiError
1034 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1035 // don't allow hidden thread resume request.
1036 if (java_thread->is_hidden_from_external_view()) {
1037 return JVMTI_ERROR_NONE;
1038 }
1039
1040 if (!java_thread->is_being_ext_suspended()) {
1041 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1042 }
1043
1044 if (!JvmtiSuspendControl::resume(java_thread)) {
1045 return JVMTI_ERROR_INTERNAL;
1046 }
1047 return JVMTI_ERROR_NONE;
1048 } /* end ResumeThread */
1049
1050
1051 // request_count - pre-checked to be greater than or equal to 0
1052 // request_list - pre-checked for NULL
1053 // results - pre-checked for NULL
1054 jvmtiError
1055 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1056 ThreadsListHandle tlh;
1057 for (int i = 0; i < request_count; i++) {
1058 JavaThread* java_thread = NULL;
1059 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1060 if (err != JVMTI_ERROR_NONE) {
1061 results[i] = err;
1062 continue;
1063 }
1064 // don't allow hidden thread resume request.
1065 if (java_thread->is_hidden_from_external_view()) {
1066 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1067 continue;
1068 }
1069 if (!java_thread->is_being_ext_suspended()) {
1070 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1071 continue;
1072 }
1073
1074 if (!JvmtiSuspendControl::resume(java_thread)) {
1075 results[i] = JVMTI_ERROR_INTERNAL;
1076 continue;
1077 }
1078
1079 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1080 }
1081 // per-thread resume results returned via results parameter
1082 return JVMTI_ERROR_NONE;
1083 } /* end ResumeThreadList */
1084
1085
1086 // Threads_lock NOT held, java_thread not protected by lock
1087 // java_thread - pre-checked
1088 jvmtiError
1089 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1090 oop e = JNIHandles::resolve_external_guard(exception);
1091 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1092
1093 JavaThread::send_async_exception(java_thread->threadObj(), e);
1094
1095 return JVMTI_ERROR_NONE;
1096
1097 } /* end StopThread */
1098
1099
1100 // Threads_lock NOT held
1101 // thread - NOT pre-checked
1102 jvmtiError
1103 JvmtiEnv::InterruptThread(jthread thread) {
1104 // TODO: this is very similar to JVM_Interrupt(); share code in future
1105 JavaThread* current_thread = JavaThread::current();
1106 JavaThread* java_thread = NULL;
1107 ThreadsListHandle tlh(current_thread);
1108 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1109 if (err != JVMTI_ERROR_NONE) {
1110 return err;
1111 }
1112
1113 Thread::interrupt(java_thread);
1114
1115 return JVMTI_ERROR_NONE;
1116 } /* end InterruptThread */
1117
1118
1119 // Threads_lock NOT held
1120 // thread - NOT pre-checked
1121 // info_ptr - pre-checked for NULL
1122 jvmtiError
1123 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1124 ResourceMark rm;
1125 HandleMark hm;
1126
1127 JavaThread* current_thread = JavaThread::current();
1128 ThreadsListHandle tlh(current_thread);
1129
1130 // if thread is NULL the current thread is used
1131 oop thread_oop = NULL;
1132 if (thread == NULL) {
1133 thread_oop = current_thread->threadObj();
1134 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1135 return JVMTI_ERROR_INVALID_THREAD;
1136 }
1137 } else {
1138 JavaThread* java_thread = NULL;
1139 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1140 if (err != JVMTI_ERROR_NONE) {
1141 // We got an error code so we don't have a JavaThread *, but
1142 // only return an error from here if we didn't get a valid
1143 // thread_oop.
1144 if (thread_oop == NULL) {
1145 return err;
1146 }
1147 // We have a valid thread_oop so we can return some thread info.
1148 }
1149 }
1150
1151 Handle thread_obj(current_thread, thread_oop);
1152 Handle name;
1153 ThreadPriority priority;
1154 Handle thread_group;
1155 Handle context_class_loader;
1156 bool is_daemon;
1157
1158 { MutexLocker mu(Threads_lock);
1159
1160 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1161 priority = java_lang_Thread::priority(thread_obj());
1162 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1163 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1164
1165 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1166 context_class_loader = Handle(current_thread, loader);
1167 }
1168 { const char *n;
1169
1170 if (name() != NULL) {
1171 n = java_lang_String::as_utf8_string(name());
1172 } else {
1173 int utf8_length = 0;
1174 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1175 }
1176
1177 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1178 if (info_ptr->name == NULL)
1179 return JVMTI_ERROR_OUT_OF_MEMORY;
1180
1181 strcpy(info_ptr->name, n);
1182 }
1183 info_ptr->is_daemon = is_daemon;
1184 info_ptr->priority = priority;
1185
1186 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1187 jni_reference(context_class_loader);
1188 info_ptr->thread_group = jni_reference(thread_group);
1189
1190 return JVMTI_ERROR_NONE;
1191 } /* end GetThreadInfo */
1192
1193
1194 // Threads_lock NOT held, java_thread not protected by lock
1195 // java_thread - pre-checked
1196 // owned_monitor_count_ptr - pre-checked for NULL
1197 // owned_monitors_ptr - pre-checked for NULL
1198 jvmtiError
1199 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1200 jvmtiError err = JVMTI_ERROR_NONE;
1201 JavaThread* calling_thread = JavaThread::current();
1202
1203 // growable array of jvmti monitors info on the C-heap
1204 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1205 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1206
1207 // It is only safe to perform the direct operation on the current
1208 // thread. All other usage needs to use a vm-safepoint-op for safety.
1209 if (java_thread == calling_thread) {
1210 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1211 } else {
1212 // JVMTI get monitors info at safepoint. Do not require target thread to
1213 // be suspended.
1214 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1215 VMThread::execute(&op);
1216 err = op.result();
1217 }
1218 jint owned_monitor_count = owned_monitors_list->length();
1219 if (err == JVMTI_ERROR_NONE) {
1220 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1221 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1222 // copy into the returned array
1223 for (int i = 0; i < owned_monitor_count; i++) {
1224 (*owned_monitors_ptr)[i] =
1225 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1226 }
1227 *owned_monitor_count_ptr = owned_monitor_count;
1228 }
1229 }
1230 // clean up.
1231 for (int i = 0; i < owned_monitor_count; i++) {
1232 deallocate((unsigned char*)owned_monitors_list->at(i));
1233 }
1234 delete owned_monitors_list;
1235
1236 return err;
1237 } /* end GetOwnedMonitorInfo */
1238
1239
1240 // Threads_lock NOT held, java_thread not protected by lock
1241 // java_thread - pre-checked
1242 // monitor_info_count_ptr - pre-checked for NULL
1243 // monitor_info_ptr - pre-checked for NULL
1244 jvmtiError
1245 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1246 jvmtiError err = JVMTI_ERROR_NONE;
1247 JavaThread* calling_thread = JavaThread::current();
1248
1249 // growable array of jvmti monitors info on the C-heap
1250 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1251 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1252
1253 // It is only safe to perform the direct operation on the current
1254 // thread. All other usage needs to use a vm-safepoint-op for safety.
1255 if (java_thread == calling_thread) {
1256 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1257 } else {
1258 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1259 // be suspended.
1260 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1261 VMThread::execute(&op);
1262 err = op.result();
1263 }
1264
1265 jint owned_monitor_count = owned_monitors_list->length();
1266 if (err == JVMTI_ERROR_NONE) {
1267 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1268 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1269 // copy to output array.
1270 for (int i = 0; i < owned_monitor_count; i++) {
1271 (*monitor_info_ptr)[i].monitor =
1272 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1273 (*monitor_info_ptr)[i].stack_depth =
1274 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1275 }
1276 }
1277 *monitor_info_count_ptr = owned_monitor_count;
1278 }
1279
1280 // clean up.
1281 for (int i = 0; i < owned_monitor_count; i++) {
1282 deallocate((unsigned char*)owned_monitors_list->at(i));
1283 }
1284 delete owned_monitors_list;
1285
1286 return err;
1287 } /* end GetOwnedMonitorStackDepthInfo */
1288
1289
1290 // Threads_lock NOT held, java_thread not protected by lock
1291 // java_thread - pre-checked
1292 // monitor_ptr - pre-checked for NULL
1293 jvmtiError
1294 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1295 jvmtiError err = JVMTI_ERROR_NONE;
1296 JavaThread* calling_thread = JavaThread::current();
1297
1298 // It is only safe to perform the direct operation on the current
1299 // thread. All other usage needs to use a vm-safepoint-op for safety.
1300 if (java_thread == calling_thread) {
1301 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1302 } else {
1303 // get contended monitor information at safepoint.
1304 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1305 VMThread::execute(&op);
1306 err = op.result();
1307 }
1308 return err;
1309 } /* end GetCurrentContendedMonitor */
1310
1311
1312 // Threads_lock NOT held
1313 // thread - NOT pre-checked
1314 // proc - pre-checked for NULL
1315 // arg - NULL is a valid value, must be checked
1316 jvmtiError
1317 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1318 JavaThread* current_thread = JavaThread::current();
1319
1320 JavaThread* java_thread = NULL;
1321 oop thread_oop = NULL;
1322 ThreadsListHandle tlh(current_thread);
1323 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1324 if (err != JVMTI_ERROR_NONE) {
1325 // We got an error code so we don't have a JavaThread *, but
1326 // only return an error from here if we didn't get a valid
1327 // thread_oop.
1328 if (thread_oop == NULL) {
1329 return err;
1330 }
1331 // We have a valid thread_oop.
1332 }
1333
1334 if (java_thread != NULL) {
1335 // 'thread' refers to an existing JavaThread.
1336 return JVMTI_ERROR_INVALID_THREAD;
1337 }
1338
1339 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1340 return JVMTI_ERROR_INVALID_PRIORITY;
1341 }
1342
1343 Handle thread_hndl(current_thread, thread_oop);
1344 {
1345 MutexLocker mu(Threads_lock); // grab Threads_lock
1346
1347 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1348
1349 // At this point it may be possible that no osthread was created for the
1350 // JavaThread due to lack of memory.
1351 if (new_thread == NULL || new_thread->osthread() == NULL) {
1352 if (new_thread != NULL) {
1353 new_thread->smr_delete();
1354 }
1355 return JVMTI_ERROR_OUT_OF_MEMORY;
1356 }
1357
1358 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1359 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1360 java_lang_Thread::set_daemon(thread_hndl());
1361
1362 new_thread->set_threadObj(thread_hndl());
1363 Threads::add(new_thread);
1364 Thread::start(new_thread);
1365 } // unlock Threads_lock
1366
1367 return JVMTI_ERROR_NONE;
1368 } /* end RunAgentThread */
1369
1370 //
1371 // Thread Group functions
1372 //
1373
1374 // group_count_ptr - pre-checked for NULL
1375 // groups_ptr - pre-checked for NULL
1376 jvmtiError
1377 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1378 JavaThread* current_thread = JavaThread::current();
1379
1380 // Only one top level thread group now.
1381 *group_count_ptr = 1;
1382
1383 // Allocate memory to store global-refs to the thread groups.
1384 // Assume this area is freed by caller.
1385 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1386
1387 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1388
1389 // Convert oop to Handle, then convert Handle to global-ref.
1390 {
1391 HandleMark hm(current_thread);
1392 Handle system_thread_group(current_thread, Universe::system_thread_group());
1393 *groups_ptr[0] = jni_reference(system_thread_group);
1394 }
1395
1396 return JVMTI_ERROR_NONE;
1397 } /* end GetTopThreadGroups */
1398
1399
1400 // info_ptr - pre-checked for NULL
1401 jvmtiError
1402 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1403 ResourceMark rm;
1404 HandleMark hm;
1405
1406 JavaThread* current_thread = JavaThread::current();
1407
1408 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1409 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1410
1411 const char* name;
1412 Handle parent_group;
1413 bool is_daemon;
1414 ThreadPriority max_priority;
1415
1416 { MutexLocker mu(Threads_lock);
1417
1418 name = java_lang_ThreadGroup::name(group_obj());
1419 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1420 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1421 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1422 }
1423
1424 info_ptr->is_daemon = is_daemon;
1425 info_ptr->max_priority = max_priority;
1426 info_ptr->parent = jni_reference(parent_group);
1427
1428 if (name != NULL) {
1429 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1430 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1431 strcpy(info_ptr->name, name);
1432 } else {
1433 info_ptr->name = NULL;
1434 }
1435
1436 return JVMTI_ERROR_NONE;
1437 } /* end GetThreadGroupInfo */
1438
1439
1440 // thread_count_ptr - pre-checked for NULL
1441 // threads_ptr - pre-checked for NULL
1442 // group_count_ptr - pre-checked for NULL
1443 // groups_ptr - pre-checked for NULL
1444 jvmtiError
1445 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1446 JavaThread* current_thread = JavaThread::current();
1447 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1448 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1449
1450 Handle *thread_objs = NULL;
1451 Handle *group_objs = NULL;
1452 int nthreads = 0;
1453 int ngroups = 0;
1454 int hidden_threads = 0;
1455
1456 ResourceMark rm(current_thread);
1457 HandleMark hm(current_thread);
1458
1459 Handle group_hdl(current_thread, group_obj);
1460
1461 { // Cannot allow thread or group counts to change.
1462 MutexLocker mu(Threads_lock);
1463
1464 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1465 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1466
1467 if (nthreads > 0) {
1468 ThreadsListHandle tlh(current_thread);
1469 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1470 assert(nthreads <= threads->length(), "too many threads");
1471 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1472 for (int i=0, j=0; i<nthreads; i++) {
1473 oop thread_obj = threads->obj_at(i);
1474 assert(thread_obj != NULL, "thread_obj is NULL");
1475 JavaThread *java_thread = NULL;
1476 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1477 if (err == JVMTI_ERROR_NONE) {
1478 // Have a valid JavaThread*.
1479 if (java_thread->is_hidden_from_external_view()) {
1480 // Filter out hidden java threads.
1481 hidden_threads++;
1482 continue;
1483 }
1484 } else {
1485 // We couldn't convert thread_obj into a JavaThread*.
1486 if (err == JVMTI_ERROR_INVALID_THREAD) {
1487 // The thread_obj does not refer to a java.lang.Thread object
1488 // so skip it.
1489 hidden_threads++;
1490 continue;
1491 }
1492 // We have a valid thread_obj, but no JavaThread*; the caller
1493 // can still have limited use for the thread_obj.
1494 }
1495 thread_objs[j++] = Handle(current_thread, thread_obj);
1496 }
1497 nthreads -= hidden_threads;
1498 } // ThreadsListHandle is destroyed here.
1499
1500 if (ngroups > 0) {
1501 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1502 assert(ngroups <= groups->length(), "too many groups");
1503 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1504 for (int i=0; i<ngroups; i++) {
1505 oop group_obj = groups->obj_at(i);
1506 assert(group_obj != NULL, "group_obj != NULL");
1507 group_objs[i] = Handle(current_thread, group_obj);
1508 }
1509 }
1510 }
1511
1512 // have to make global handles outside of Threads_lock
1513 *group_count_ptr = ngroups;
1514 *thread_count_ptr = nthreads;
1515 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1516 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1517 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1518 return JVMTI_ERROR_OUT_OF_MEMORY;
1519 }
1520 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1521 return JVMTI_ERROR_OUT_OF_MEMORY;
1522 }
1523
1524 return JVMTI_ERROR_NONE;
1525 } /* end GetThreadGroupChildren */
1526
1527
1528 //
1529 // Stack Frame functions
1530 //
1531
1532 // Threads_lock NOT held, java_thread not protected by lock
1533 // java_thread - pre-checked
1534 // max_frame_count - pre-checked to be greater than or equal to 0
1535 // frame_buffer - pre-checked for NULL
1536 // count_ptr - pre-checked for NULL
1537 jvmtiError
1538 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1539 jvmtiError err = JVMTI_ERROR_NONE;
1540
1541 // It is only safe to perform the direct operation on the current
1542 // thread. All other usage needs to use a vm-safepoint-op for safety.
1543 if (java_thread == JavaThread::current()) {
1544 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1545 } else {
1546 // JVMTI get stack trace at safepoint. Do not require target thread to
1547 // be suspended.
1548 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1549 VMThread::execute(&op);
1550 err = op.result();
1551 }
1552
1553 return err;
1554 } /* end GetStackTrace */
1555
1556
1557 // max_frame_count - pre-checked to be greater than or equal to 0
1558 // stack_info_ptr - pre-checked for NULL
1559 // thread_count_ptr - pre-checked for NULL
1560 jvmtiError
1561 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1562 jvmtiError err = JVMTI_ERROR_NONE;
1563 JavaThread* calling_thread = JavaThread::current();
1564
1565 // JVMTI get stack traces at safepoint.
1566 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1567 VMThread::execute(&op);
1568 *thread_count_ptr = op.final_thread_count();
1569 *stack_info_ptr = op.stack_info();
1570 err = op.result();
1571 return err;
1572 } /* end GetAllStackTraces */
1573
1574
1575 // thread_count - pre-checked to be greater than or equal to 0
1576 // thread_list - pre-checked for NULL
1577 // max_frame_count - pre-checked to be greater than or equal to 0
1578 // stack_info_ptr - pre-checked for NULL
1579 jvmtiError
1580 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1581 jvmtiError err = JVMTI_ERROR_NONE;
1582 // JVMTI get stack traces at safepoint.
1583 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1584 VMThread::execute(&op);
1585 err = op.result();
1586 if (err == JVMTI_ERROR_NONE) {
1587 *stack_info_ptr = op.stack_info();
1588 }
1589 return err;
1590 } /* end GetThreadListStackTraces */
1591
1592
1593 // Threads_lock NOT held, java_thread not protected by lock
1594 // java_thread - pre-checked
1595 // count_ptr - pre-checked for NULL
1596 jvmtiError
1597 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1598 jvmtiError err = JVMTI_ERROR_NONE;
1599
1600 // retrieve or create JvmtiThreadState.
1601 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1602 if (state == NULL) {
1603 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1604 }
1605
1606 // It is only safe to perform the direct operation on the current
1607 // thread. All other usage needs to use a vm-safepoint-op for safety.
1608 if (java_thread == JavaThread::current()) {
1609 err = get_frame_count(state, count_ptr);
1610 } else {
1611 // get java stack frame count at safepoint.
1612 VM_GetFrameCount op(this, state, count_ptr);
1613 VMThread::execute(&op);
1614 err = op.result();
1615 }
1616 return err;
1617 } /* end GetFrameCount */
1618
1619
1620 // Threads_lock NOT held, java_thread not protected by lock
1621 // java_thread - pre-checked
1622 jvmtiError
1623 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1624 JavaThread* current_thread = JavaThread::current();
1625 HandleMark hm(current_thread);
1626 uint32_t debug_bits = 0;
1627
1628 // retrieve or create the state
1629 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1630 if (state == NULL) {
1631 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1632 }
1633
1634 // Check if java_thread is fully suspended
1635 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1636 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1637 }
1638 // Check to see if a PopFrame was already in progress
1639 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1640 // Probably possible for JVMTI clients to trigger this, but the
1641 // JPDA backend shouldn't allow this to happen
1642 return JVMTI_ERROR_INTERNAL;
1643 }
1644
1645 {
1646 // Was workaround bug
1647 // 4812902: popFrame hangs if the method is waiting at a synchronize
1648 // Catch this condition and return an error to avoid hanging.
1649 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1650 OSThread* osThread = java_thread->osthread();
1651 if (osThread->get_state() == MONITOR_WAIT) {
1652 return JVMTI_ERROR_OPAQUE_FRAME;
1653 }
1654 }
1655
1656 {
1657 ResourceMark rm(current_thread);
1658 // Check if there are more than one Java frame in this thread, that the top two frames
1659 // are Java (not native) frames, and that there is no intervening VM frame
1660 int frame_count = 0;
1661 bool is_interpreted[2];
1662 intptr_t *frame_sp[2];
1663 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1664 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1665 methodHandle mh(current_thread, vfs.method());
1666 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1667 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1668 frame_sp[frame_count] = vfs.frame_id();
1669 if (++frame_count > 1) break;
1670 }
1671 if (frame_count < 2) {
1672 // We haven't found two adjacent non-native Java frames on the top.
1673 // There can be two situations here:
1674 // 1. There are no more java frames
1675 // 2. Two top java frames are separated by non-java native frames
1676 if(vframeFor(java_thread, 1) == NULL) {
1677 return JVMTI_ERROR_NO_MORE_FRAMES;
1678 } else {
1679 // Intervening non-java native or VM frames separate java frames.
1680 // Current implementation does not support this. See bug #5031735.
1681 // In theory it is possible to pop frames in such cases.
1682 return JVMTI_ERROR_OPAQUE_FRAME;
1683 }
1684 }
1685
1686 // If any of the top 2 frames is a compiled one, need to deoptimize it
1687 for (int i = 0; i < 2; i++) {
1688 if (!is_interpreted[i]) {
1689 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1690 }
1691 }
1692
1693 // Update the thread state to reflect that the top frame is popped
1694 // so that cur_stack_depth is maintained properly and all frameIDs
1695 // are invalidated.
1696 // The current frame will be popped later when the suspended thread
1697 // is resumed and right before returning from VM to Java.
1698 // (see call_VM_base() in assembler_<cpu>.cpp).
1699
1700 // It's fine to update the thread state here because no JVMTI events
1701 // shall be posted for this PopFrame.
1702
1703 // It is only safe to perform the direct operation on the current
1704 // thread. All other usage needs to use a vm-safepoint-op for safety.
1705 if (java_thread == JavaThread::current()) {
1706 state->update_for_pop_top_frame();
1707 } else {
1708 VM_UpdateForPopTopFrame op(state);
1709 VMThread::execute(&op);
1710 jvmtiError err = op.result();
1711 if (err != JVMTI_ERROR_NONE) {
1712 return err;
1713 }
1714 }
1715
1716 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1717 // Set pending step flag for this popframe and it is cleared when next
1718 // step event is posted.
1719 state->set_pending_step_for_popframe();
1720 }
1721
1722 return JVMTI_ERROR_NONE;
1723 } /* end PopFrame */
1724
1725
1726 // Threads_lock NOT held, java_thread not protected by lock
1727 // java_thread - pre-checked
1728 // java_thread - unchecked
1729 // depth - pre-checked as non-negative
1730 // method_ptr - pre-checked for NULL
1731 // location_ptr - pre-checked for NULL
1732 jvmtiError
1733 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1734 jvmtiError err = JVMTI_ERROR_NONE;
1735
1736 // It is only safe to perform the direct operation on the current
1737 // thread. All other usage needs to use a vm-safepoint-op for safety.
1738 if (java_thread == JavaThread::current()) {
1739 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1740 } else {
1741 // JVMTI get java stack frame location at safepoint.
1742 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1743 VMThread::execute(&op);
1744 err = op.result();
1745 }
1746 return err;
1747 } /* end GetFrameLocation */
1748
1749
1750 // Threads_lock NOT held, java_thread not protected by lock
1751 // java_thread - pre-checked
1752 // java_thread - unchecked
1753 // depth - pre-checked as non-negative
1754 jvmtiError
1755 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1756 jvmtiError err = JVMTI_ERROR_NONE;
1757 ResourceMark rm;
1758 uint32_t debug_bits = 0;
1759
1760 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1761 if (state == NULL) {
1762 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1763 }
1764
1765 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1766 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1767 }
1768
1769 if (TraceJVMTICalls) {
1770 JvmtiSuspendControl::print();
1771 }
1772
1773 vframe *vf = vframeFor(java_thread, depth);
1774 if (vf == NULL) {
1775 return JVMTI_ERROR_NO_MORE_FRAMES;
1776 }
1777
1778 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1779 return JVMTI_ERROR_OPAQUE_FRAME;
1780 }
1781
1782 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1783
1784 // It is only safe to perform the direct operation on the current
1785 // thread. All other usage needs to use a vm-safepoint-op for safety.
1786 if (java_thread == JavaThread::current()) {
1787 int frame_number = state->count_frames() - depth;
1788 state->env_thread_state(this)->set_frame_pop(frame_number);
1789 } else {
1790 VM_SetFramePop op(this, state, depth);
1791 VMThread::execute(&op);
1792 err = op.result();
1793 }
1794 return err;
1795 } /* end NotifyFramePop */
1796
1797
1798 //
1799 // Force Early Return functions
1800 //
1801
1802 // Threads_lock NOT held, java_thread not protected by lock
1803 // java_thread - pre-checked
1804 jvmtiError
1805 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1806 jvalue val;
1807 val.l = value;
1808 return force_early_return(java_thread, val, atos);
1809 } /* end ForceEarlyReturnObject */
1810
1811
1812 // Threads_lock NOT held, java_thread not protected by lock
1813 // java_thread - pre-checked
1814 jvmtiError
1815 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1816 jvalue val;
1817 val.i = value;
1818 return force_early_return(java_thread, val, itos);
1819 } /* end ForceEarlyReturnInt */
1820
1821
1822 // Threads_lock NOT held, java_thread not protected by lock
1823 // java_thread - pre-checked
1824 jvmtiError
1825 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1826 jvalue val;
1827 val.j = value;
1828 return force_early_return(java_thread, val, ltos);
1829 } /* end ForceEarlyReturnLong */
1830
1831
1832 // Threads_lock NOT held, java_thread not protected by lock
1833 // java_thread - pre-checked
1834 jvmtiError
1835 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1836 jvalue val;
1837 val.f = value;
1838 return force_early_return(java_thread, val, ftos);
1839 } /* end ForceEarlyReturnFloat */
1840
1841
1842 // Threads_lock NOT held, java_thread not protected by lock
1843 // java_thread - pre-checked
1844 jvmtiError
1845 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1846 jvalue val;
1847 val.d = value;
1848 return force_early_return(java_thread, val, dtos);
1849 } /* end ForceEarlyReturnDouble */
1850
1851
1852 // Threads_lock NOT held, java_thread not protected by lock
1853 // java_thread - pre-checked
1854 jvmtiError
1855 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1856 jvalue val;
1857 val.j = 0L;
1858 return force_early_return(java_thread, val, vtos);
1859 } /* end ForceEarlyReturnVoid */
1860
1861
1862 //
1863 // Heap functions
1864 //
1865
1866 // klass - NULL is a valid value, must be checked
1867 // initial_object - NULL is a valid value, must be checked
1868 // callbacks - pre-checked for NULL
1869 // user_data - NULL is a valid value, must be checked
1870 jvmtiError
1871 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1872 // check klass if provided
1873 Klass* k = NULL;
1874 if (klass != NULL) {
1875 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1876 if (k_mirror == NULL) {
1877 return JVMTI_ERROR_INVALID_CLASS;
1878 }
1879 if (java_lang_Class::is_primitive(k_mirror)) {
1880 return JVMTI_ERROR_NONE;
1881 }
1882 k = java_lang_Class::as_Klass(k_mirror);
1883 if (klass == NULL) {
1884 return JVMTI_ERROR_INVALID_CLASS;
1885 }
1886 }
1887
1888 if (initial_object != NULL) {
1889 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1890 if (init_obj == NULL) {
1891 return JVMTI_ERROR_INVALID_OBJECT;
1892 }
1893 }
1894
1895 Thread *thread = Thread::current();
1896 HandleMark hm(thread);
1897
1898 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1899 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1900 return JVMTI_ERROR_NONE;
1901 } /* end FollowReferences */
1902
1903
1904 // klass - NULL is a valid value, must be checked
1905 // callbacks - pre-checked for NULL
1906 // user_data - NULL is a valid value, must be checked
1907 jvmtiError
1908 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1909 // check klass if provided
1910 Klass* k = NULL;
1911 if (klass != NULL) {
1912 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1913 if (k_mirror == NULL) {
1914 return JVMTI_ERROR_INVALID_CLASS;
1915 }
1916 if (java_lang_Class::is_primitive(k_mirror)) {
1917 return JVMTI_ERROR_NONE;
1918 }
1919 k = java_lang_Class::as_Klass(k_mirror);
1920 if (k == NULL) {
1921 return JVMTI_ERROR_INVALID_CLASS;
1922 }
1923 }
1924
1925 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1926 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1927 return JVMTI_ERROR_NONE;
1928 } /* end IterateThroughHeap */
1929
1930
1931 // tag_ptr - pre-checked for NULL
1932 jvmtiError
1933 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1934 oop o = JNIHandles::resolve_external_guard(object);
1935 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1936 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1937 return JVMTI_ERROR_NONE;
1938 } /* end GetTag */
1939
1940
1941 jvmtiError
1942 JvmtiEnv::SetTag(jobject object, jlong tag) {
1943 oop o = JNIHandles::resolve_external_guard(object);
1944 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1945 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1946 return JVMTI_ERROR_NONE;
1947 } /* end SetTag */
1948
1949
1950 // tag_count - pre-checked to be greater than or equal to 0
1951 // tags - pre-checked for NULL
1952 // count_ptr - pre-checked for NULL
1953 // object_result_ptr - NULL is a valid value, must be checked
1954 // tag_result_ptr - NULL is a valid value, must be checked
1955 jvmtiError
1956 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1957 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1958 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1959 } /* end GetObjectsWithTags */
1960
1961
1962 jvmtiError
1963 JvmtiEnv::ForceGarbageCollection() {
1964 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1965 return JVMTI_ERROR_NONE;
1966 } /* end ForceGarbageCollection */
1967
1968
1969 //
1970 // Heap (1.0) functions
1971 //
1972
1973 // object_reference_callback - pre-checked for NULL
1974 // user_data - NULL is a valid value, must be checked
1975 jvmtiError
1976 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1977 oop o = JNIHandles::resolve_external_guard(object);
1978 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1979 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1980 return JVMTI_ERROR_NONE;
1981 } /* end IterateOverObjectsReachableFromObject */
1982
1983
1984 // heap_root_callback - NULL is a valid value, must be checked
1985 // stack_ref_callback - NULL is a valid value, must be checked
1986 // object_ref_callback - NULL is a valid value, must be checked
1987 // user_data - NULL is a valid value, must be checked
1988 jvmtiError
1989 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1990 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1991 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1992 return JVMTI_ERROR_NONE;
1993 } /* end IterateOverReachableObjects */
1994
1995
1996 // heap_object_callback - pre-checked for NULL
1997 // user_data - NULL is a valid value, must be checked
1998 jvmtiError
1999 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2000 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
2001 Thread *thread = Thread::current();
2002 HandleMark hm(thread);
2003 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
2004 return JVMTI_ERROR_NONE;
2005 } /* end IterateOverHeap */
2006
2007
2008 // k_mirror - may be primitive, this must be checked
2009 // heap_object_callback - pre-checked for NULL
2010 // user_data - NULL is a valid value, must be checked
2011 jvmtiError
2012 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2013 if (java_lang_Class::is_primitive(k_mirror)) {
2014 // DO PRIMITIVE CLASS PROCESSING
2015 return JVMTI_ERROR_NONE;
2016 }
2017 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2018 if (klass == NULL) {
2019 return JVMTI_ERROR_INVALID_CLASS;
2020 }
2021 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2022 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2023 return JVMTI_ERROR_NONE;
2024 } /* end IterateOverInstancesOfClass */
2025
2026
2027 //
2028 // Local Variable functions
2029 //
2030
2031 // Threads_lock NOT held, java_thread not protected by lock
2032 // java_thread - pre-checked
2033 // java_thread - unchecked
2034 // depth - pre-checked as non-negative
2035 // value_ptr - pre-checked for NULL
2036 jvmtiError
2037 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2038 JavaThread* current_thread = JavaThread::current();
2039 // rm object is created to clean up the javaVFrame created in
2040 // doit_prologue(), but after doit() is finished with it.
2041 ResourceMark rm(current_thread);
2042
2043 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2044 VMThread::execute(&op);
2045 jvmtiError err = op.result();
2046 if (err != JVMTI_ERROR_NONE) {
2047 return err;
2048 } else {
2049 *value_ptr = op.value().l;
2050 return JVMTI_ERROR_NONE;
2051 }
2052 } /* end GetLocalObject */
2053
2054 // Threads_lock NOT held, java_thread not protected by lock
2055 // java_thread - pre-checked
2056 // java_thread - unchecked
2057 // depth - pre-checked as non-negative
2058 // value - pre-checked for NULL
2059 jvmtiError
2060 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2061 JavaThread* current_thread = JavaThread::current();
2062 // rm object is created to clean up the javaVFrame created in
2063 // doit_prologue(), but after doit() is finished with it.
2064 ResourceMark rm(current_thread);
2065
2066 VM_GetReceiver op(java_thread, current_thread, depth);
2067 VMThread::execute(&op);
2068 jvmtiError err = op.result();
2069 if (err != JVMTI_ERROR_NONE) {
2070 return err;
2071 } else {
2072 *value_ptr = op.value().l;
2073 return JVMTI_ERROR_NONE;
2074 }
2075 } /* end GetLocalInstance */
2076
2077
2078 // Threads_lock NOT held, java_thread not protected by lock
2079 // java_thread - pre-checked
2080 // java_thread - unchecked
2081 // depth - pre-checked as non-negative
2082 // value_ptr - pre-checked for NULL
2083 jvmtiError
2084 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2085 // rm object is created to clean up the javaVFrame created in
2086 // doit_prologue(), but after doit() is finished with it.
2087 ResourceMark rm;
2088
2089 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2090 VMThread::execute(&op);
2091 *value_ptr = op.value().i;
2092 return op.result();
2093 } /* end GetLocalInt */
2094
2095
2096 // Threads_lock NOT held, java_thread not protected by lock
2097 // java_thread - pre-checked
2098 // java_thread - unchecked
2099 // depth - pre-checked as non-negative
2100 // value_ptr - pre-checked for NULL
2101 jvmtiError
2102 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2103 // rm object is created to clean up the javaVFrame created in
2104 // doit_prologue(), but after doit() is finished with it.
2105 ResourceMark rm;
2106
2107 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2108 VMThread::execute(&op);
2109 *value_ptr = op.value().j;
2110 return op.result();
2111 } /* end GetLocalLong */
2112
2113
2114 // Threads_lock NOT held, java_thread not protected by lock
2115 // java_thread - pre-checked
2116 // java_thread - unchecked
2117 // depth - pre-checked as non-negative
2118 // value_ptr - pre-checked for NULL
2119 jvmtiError
2120 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2121 // rm object is created to clean up the javaVFrame created in
2122 // doit_prologue(), but after doit() is finished with it.
2123 ResourceMark rm;
2124
2125 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2126 VMThread::execute(&op);
2127 *value_ptr = op.value().f;
2128 return op.result();
2129 } /* end GetLocalFloat */
2130
2131
2132 // Threads_lock NOT held, java_thread not protected by lock
2133 // java_thread - pre-checked
2134 // java_thread - unchecked
2135 // depth - pre-checked as non-negative
2136 // value_ptr - pre-checked for NULL
2137 jvmtiError
2138 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2139 // rm object is created to clean up the javaVFrame created in
2140 // doit_prologue(), but after doit() is finished with it.
2141 ResourceMark rm;
2142
2143 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2144 VMThread::execute(&op);
2145 *value_ptr = op.value().d;
2146 return op.result();
2147 } /* end GetLocalDouble */
2148
2149
2150 // Threads_lock NOT held, java_thread not protected by lock
2151 // java_thread - pre-checked
2152 // java_thread - unchecked
2153 // depth - pre-checked as non-negative
2154 jvmtiError
2155 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2156 // rm object is created to clean up the javaVFrame created in
2157 // doit_prologue(), but after doit() is finished with it.
2158 ResourceMark rm;
2159 jvalue val;
2160 val.l = value;
2161 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2162 VMThread::execute(&op);
2163 return op.result();
2164 } /* end SetLocalObject */
2165
2166
2167 // Threads_lock NOT held, java_thread not protected by lock
2168 // java_thread - pre-checked
2169 // java_thread - unchecked
2170 // depth - pre-checked as non-negative
2171 jvmtiError
2172 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2173 // rm object is created to clean up the javaVFrame created in
2174 // doit_prologue(), but after doit() is finished with it.
2175 ResourceMark rm;
2176 jvalue val;
2177 val.i = value;
2178 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2179 VMThread::execute(&op);
2180 return op.result();
2181 } /* end SetLocalInt */
2182
2183
2184 // Threads_lock NOT held, java_thread not protected by lock
2185 // java_thread - pre-checked
2186 // java_thread - unchecked
2187 // depth - pre-checked as non-negative
2188 jvmtiError
2189 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2190 // rm object is created to clean up the javaVFrame created in
2191 // doit_prologue(), but after doit() is finished with it.
2192 ResourceMark rm;
2193 jvalue val;
2194 val.j = value;
2195 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2196 VMThread::execute(&op);
2197 return op.result();
2198 } /* end SetLocalLong */
2199
2200
2201 // Threads_lock NOT held, java_thread not protected by lock
2202 // java_thread - pre-checked
2203 // java_thread - unchecked
2204 // depth - pre-checked as non-negative
2205 jvmtiError
2206 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2207 // rm object is created to clean up the javaVFrame created in
2208 // doit_prologue(), but after doit() is finished with it.
2209 ResourceMark rm;
2210 jvalue val;
2211 val.f = value;
2212 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2213 VMThread::execute(&op);
2214 return op.result();
2215 } /* end SetLocalFloat */
2216
2217
2218 // Threads_lock NOT held, java_thread not protected by lock
2219 // java_thread - pre-checked
2220 // java_thread - unchecked
2221 // depth - pre-checked as non-negative
2222 jvmtiError
2223 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2224 // rm object is created to clean up the javaVFrame created in
2225 // doit_prologue(), but after doit() is finished with it.
2226 ResourceMark rm;
2227 jvalue val;
2228 val.d = value;
2229 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2230 VMThread::execute(&op);
2231 return op.result();
2232 } /* end SetLocalDouble */
2233
2234
2235 //
2236 // Breakpoint functions
2237 //
2238
2239 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2240 jvmtiError
2241 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2242 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2243 if (location < 0) { // simple invalid location check first
2244 return JVMTI_ERROR_INVALID_LOCATION;
2245 }
2246 // verify that the breakpoint is not past the end of the method
2247 if (location >= (jlocation) method_oop->code_size()) {
2248 return JVMTI_ERROR_INVALID_LOCATION;
2249 }
2250
2251 ResourceMark rm;
2252 JvmtiBreakpoint bp(method_oop, location);
2253 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2254 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2255 return JVMTI_ERROR_DUPLICATE;
2256
2257 if (TraceJVMTICalls) {
2258 jvmti_breakpoints.print();
2259 }
2260
2261 return JVMTI_ERROR_NONE;
2262 } /* end SetBreakpoint */
2263
2264
2265 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2266 jvmtiError
2267 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2268 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2269
2270 if (location < 0) { // simple invalid location check first
2271 return JVMTI_ERROR_INVALID_LOCATION;
2272 }
2273
2274 // verify that the breakpoint is not past the end of the method
2275 if (location >= (jlocation) method_oop->code_size()) {
2276 return JVMTI_ERROR_INVALID_LOCATION;
2277 }
2278
2279 JvmtiBreakpoint bp(method_oop, location);
2280
2281 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2282 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2283 return JVMTI_ERROR_NOT_FOUND;
2284
2285 if (TraceJVMTICalls) {
2286 jvmti_breakpoints.print();
2287 }
2288
2289 return JVMTI_ERROR_NONE;
2290 } /* end ClearBreakpoint */
2291
2292
2293 //
2294 // Watched Field functions
2295 //
2296
2297 jvmtiError
2298 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2299 // make sure we haven't set this watch before
2300 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2301 fdesc_ptr->set_is_field_access_watched(true);
2302
2303 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2304
2305 return JVMTI_ERROR_NONE;
2306 } /* end SetFieldAccessWatch */
2307
2308
2309 jvmtiError
2310 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2311 // make sure we have a watch to clear
2312 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2313 fdesc_ptr->set_is_field_access_watched(false);
2314
2315 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2316
2317 return JVMTI_ERROR_NONE;
2318 } /* end ClearFieldAccessWatch */
2319
2320
2321 jvmtiError
2322 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2323 // make sure we haven't set this watch before
2324 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2325 fdesc_ptr->set_is_field_modification_watched(true);
2326
2327 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2328
2329 return JVMTI_ERROR_NONE;
2330 } /* end SetFieldModificationWatch */
2331
2332
2333 jvmtiError
2334 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2335 // make sure we have a watch to clear
2336 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2337 fdesc_ptr->set_is_field_modification_watched(false);
2338
2339 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2340
2341 return JVMTI_ERROR_NONE;
2342 } /* end ClearFieldModificationWatch */
2343
2344 //
2345 // Class functions
2346 //
2347
2348
2349 // k_mirror - may be primitive, this must be checked
2350 // signature_ptr - NULL is a valid value, must be checked
2351 // generic_ptr - NULL is a valid value, must be checked
2352 jvmtiError
2353 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2354 ResourceMark rm;
2355 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2356 Klass* k = NULL;
2357 if (!isPrimitive) {
2358 k = java_lang_Class::as_Klass(k_mirror);
2359 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2360 }
2361 if (signature_ptr != NULL) {
2362 char* result = NULL;
2363 if (isPrimitive) {
2364 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2365 result = (char*) jvmtiMalloc(2);
2366 result[0] = tchar;
2367 result[1] = '\0';
2368 } else {
2369 const char* class_sig = k->signature_name();
2370 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2371 strcpy(result, class_sig);
2372 }
2373 *signature_ptr = result;
2374 }
2375 if (generic_ptr != NULL) {
2376 *generic_ptr = NULL;
2377 if (!isPrimitive && k->is_instance_klass()) {
2378 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2379 if (soo != NULL) {
2380 const char *gen_sig = soo->as_C_string();
2381 if (gen_sig != NULL) {
2382 char* gen_result;
2383 jvmtiError err = allocate(strlen(gen_sig) + 1,
2384 (unsigned char **)&gen_result);
2385 if (err != JVMTI_ERROR_NONE) {
2386 return err;
2387 }
2388 strcpy(gen_result, gen_sig);
2389 *generic_ptr = gen_result;
2390 }
2391 }
2392 }
2393 }
2394 return JVMTI_ERROR_NONE;
2395 } /* end GetClassSignature */
2396
2397
2398 // k_mirror - may be primitive, this must be checked
2399 // status_ptr - pre-checked for NULL
2400 jvmtiError
2401 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2402 jint result = 0;
2403 if (java_lang_Class::is_primitive(k_mirror)) {
2404 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2405 } else {
2406 Klass* k = java_lang_Class::as_Klass(k_mirror);
2407 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2408 result = k->jvmti_class_status();
2409 }
2410 *status_ptr = result;
2411
2412 return JVMTI_ERROR_NONE;
2413 } /* end GetClassStatus */
2414
2415
2416 // k_mirror - may be primitive, this must be checked
2417 // source_name_ptr - pre-checked for NULL
2418 jvmtiError
2419 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2420 if (java_lang_Class::is_primitive(k_mirror)) {
2421 return JVMTI_ERROR_ABSENT_INFORMATION;
2422 }
2423 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2424 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2425
2426 if (!k_klass->is_instance_klass()) {
2427 return JVMTI_ERROR_ABSENT_INFORMATION;
2428 }
2429
2430 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2431 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2432 {
2433 JavaThread* current_thread = JavaThread::current();
2434 ResourceMark rm(current_thread);
2435 const char* sfncp = (const char*) sfnOop->as_C_string();
2436 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2437 strcpy(*source_name_ptr, sfncp);
2438 }
2439
2440 return JVMTI_ERROR_NONE;
2441 } /* end GetSourceFileName */
2442
2443
2444 // k_mirror - may be primitive, this must be checked
2445 // modifiers_ptr - pre-checked for NULL
2446 jvmtiError
2447 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2448 JavaThread* current_thread = JavaThread::current();
2449 jint result = 0;
2450 if (!java_lang_Class::is_primitive(k_mirror)) {
2451 Klass* k = java_lang_Class::as_Klass(k_mirror);
2452 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2453 result = k->compute_modifier_flags(current_thread);
2454 JavaThread* THREAD = current_thread; // pass to macros
2455 if (HAS_PENDING_EXCEPTION) {
2456 CLEAR_PENDING_EXCEPTION;
2457 return JVMTI_ERROR_INTERNAL;
2458 };
2459
2460 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2461 if(k->is_super()) {
2462 result |= JVM_ACC_SUPER;
2463 }
2464 } else {
2465 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2466 }
2467 *modifiers_ptr = result;
2468
2469 return JVMTI_ERROR_NONE;
2470 } /* end GetClassModifiers */
2471
2472
2473 // k_mirror - may be primitive, this must be checked
2474 // method_count_ptr - pre-checked for NULL
2475 // methods_ptr - pre-checked for NULL
2476 jvmtiError
2477 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2478 JavaThread* current_thread = JavaThread::current();
2479 HandleMark hm(current_thread);
2480
2481 if (java_lang_Class::is_primitive(k_mirror)) {
2482 *method_count_ptr = 0;
2483 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2484 return JVMTI_ERROR_NONE;
2485 }
2486 Klass* k = java_lang_Class::as_Klass(k_mirror);
2487 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2488
2489 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2490 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2491 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2492 }
2493
2494 if (!k->is_instance_klass()) {
2495 *method_count_ptr = 0;
2496 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2497 return JVMTI_ERROR_NONE;
2498 }
2499 InstanceKlass* ik = InstanceKlass::cast(k);
2500 // Allocate the result and fill it in
2501 int result_length = ik->methods()->length();
2502 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2503 int index;
2504 bool jmethodids_found = true;
2505
2506 if (JvmtiExport::can_maintain_original_method_order()) {
2507 // Use the original method ordering indices stored in the class, so we can emit
2508 // jmethodIDs in the order they appeared in the class file
2509 for (index = 0; index < result_length; index++) {
2510 Method* m = ik->methods()->at(index);
2511 int original_index = ik->method_ordering()->at(index);
2512 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2513 jmethodID id;
2514 if (jmethodids_found) {
2515 id = m->find_jmethod_id_or_null();
2516 if (id == NULL) {
2517 // If we find an uninitialized value, make sure there is
2518 // enough space for all the uninitialized values we might
2519 // find.
2520 ik->ensure_space_for_methodids(index);
2521 jmethodids_found = false;
2522 id = m->jmethod_id();
2523 }
2524 } else {
2525 id = m->jmethod_id();
2526 }
2527 result_list[original_index] = id;
2528 }
2529 } else {
2530 // otherwise just copy in any order
2531 for (index = 0; index < result_length; index++) {
2532 Method* m = ik->methods()->at(index);
2533 jmethodID id;
2534 if (jmethodids_found) {
2535 id = m->find_jmethod_id_or_null();
2536 if (id == NULL) {
2537 // If we find an uninitialized value, make sure there is
2538 // enough space for all the uninitialized values we might
2539 // find.
2540 ik->ensure_space_for_methodids(index);
2541 jmethodids_found = false;
2542 id = m->jmethod_id();
2543 }
2544 } else {
2545 id = m->jmethod_id();
2546 }
2547 result_list[index] = id;
2548 }
2549 }
2550 // Fill in return value.
2551 *method_count_ptr = result_length;
2552 *methods_ptr = result_list;
2553
2554 return JVMTI_ERROR_NONE;
2555 } /* end GetClassMethods */
2556
2557
2558 // k_mirror - may be primitive, this must be checked
2559 // field_count_ptr - pre-checked for NULL
2560 // fields_ptr - pre-checked for NULL
2561 jvmtiError
2562 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2563 if (java_lang_Class::is_primitive(k_mirror)) {
2564 *field_count_ptr = 0;
2565 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2566 return JVMTI_ERROR_NONE;
2567 }
2568 JavaThread* current_thread = JavaThread::current();
2569 HandleMark hm(current_thread);
2570 Klass* k = java_lang_Class::as_Klass(k_mirror);
2571 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2572
2573 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2574 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2575 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2576 }
2577
2578 if (!k->is_instance_klass()) {
2579 *field_count_ptr = 0;
2580 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2581 return JVMTI_ERROR_NONE;
2582 }
2583
2584
2585 InstanceKlass* ik = InstanceKlass::cast(k);
2586
2587 int result_count = 0;
2588 // First, count the fields.
2589 FilteredFieldStream flds(ik, true, true);
2590 result_count = flds.field_count();
2591
2592 // Allocate the result and fill it in
2593 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2594 // The JVMTI spec requires fields in the order they occur in the class file,
2595 // this is the reverse order of what FieldStream hands out.
2596 int id_index = (result_count - 1);
2597
2598 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2599 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2600 ik, src_st.offset(),
2601 src_st.access_flags().is_static());
2602 }
2603 assert(id_index == -1, "just checking");
2604 // Fill in the results
2605 *field_count_ptr = result_count;
2606 *fields_ptr = result_list;
2607
2608 return JVMTI_ERROR_NONE;
2609 } /* end GetClassFields */
2610
2611
2612 // k_mirror - may be primitive, this must be checked
2613 // interface_count_ptr - pre-checked for NULL
2614 // interfaces_ptr - pre-checked for NULL
2615 jvmtiError
2616 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2617 {
2618 if (java_lang_Class::is_primitive(k_mirror)) {
2619 *interface_count_ptr = 0;
2620 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2621 return JVMTI_ERROR_NONE;
2622 }
2623 JavaThread* current_thread = JavaThread::current();
2624 HandleMark hm(current_thread);
2625 Klass* k = java_lang_Class::as_Klass(k_mirror);
2626 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2627
2628 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2629 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2630 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2631
2632 if (!k->is_instance_klass()) {
2633 *interface_count_ptr = 0;
2634 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2635 return JVMTI_ERROR_NONE;
2636 }
2637
2638 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2639 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2640 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2641 for (int i_index = 0; i_index < result_length; i_index += 1) {
2642 Klass* klass_at = interface_list->at(i_index);
2643 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2644 assert(klass_at->is_interface(), "interfaces must be interfaces");
2645 oop mirror_at = klass_at->java_mirror();
2646 Handle handle_at = Handle(current_thread, mirror_at);
2647 result_list[i_index] = (jclass) jni_reference(handle_at);
2648 }
2649 *interface_count_ptr = result_length;
2650 *interfaces_ptr = result_list;
2651 }
2652
2653 return JVMTI_ERROR_NONE;
2654 } /* end GetImplementedInterfaces */
2655
2656
2657 // k_mirror - may be primitive, this must be checked
2658 // minor_version_ptr - pre-checked for NULL
2659 // major_version_ptr - pre-checked for NULL
2660 jvmtiError
2661 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2662 if (java_lang_Class::is_primitive(k_mirror)) {
2663 return JVMTI_ERROR_ABSENT_INFORMATION;
2664 }
2665 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2666
2667 jint status = klass->jvmti_class_status();
2668 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2669 return JVMTI_ERROR_INVALID_CLASS;
2670 }
2671 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2672 return JVMTI_ERROR_ABSENT_INFORMATION;
2673 }
2674
2675 InstanceKlass* ik = InstanceKlass::cast(klass);
2676 *minor_version_ptr = ik->minor_version();
2677 *major_version_ptr = ik->major_version();
2678
2679 return JVMTI_ERROR_NONE;
2680 } /* end GetClassVersionNumbers */
2681
2682
2683 // k_mirror - may be primitive, this must be checked
2684 // constant_pool_count_ptr - pre-checked for NULL
2685 // constant_pool_byte_count_ptr - pre-checked for NULL
2686 // constant_pool_bytes_ptr - pre-checked for NULL
2687 jvmtiError
2688 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2689 if (java_lang_Class::is_primitive(k_mirror)) {
2690 return JVMTI_ERROR_ABSENT_INFORMATION;
2691 }
2692
2693 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2694 Thread *thread = Thread::current();
2695 ResourceMark rm(thread);
2696
2697 jint status = klass->jvmti_class_status();
2698 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2699 return JVMTI_ERROR_INVALID_CLASS;
2700 }
2701 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2702 return JVMTI_ERROR_ABSENT_INFORMATION;
2703 }
2704
2705 InstanceKlass* ik = InstanceKlass::cast(klass);
2706 JvmtiConstantPoolReconstituter reconstituter(ik);
2707 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2708 return reconstituter.get_error();
2709 }
2710
2711 unsigned char *cpool_bytes;
2712 int cpool_size = reconstituter.cpool_size();
2713 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2714 return reconstituter.get_error();
2715 }
2716 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2717 if (res != JVMTI_ERROR_NONE) {
2718 return res;
2719 }
2720 reconstituter.copy_cpool_bytes(cpool_bytes);
2721 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2722 return reconstituter.get_error();
2723 }
2724
2725 constantPoolHandle constants(thread, ik->constants());
2726 *constant_pool_count_ptr = constants->length();
2727 *constant_pool_byte_count_ptr = cpool_size;
2728 *constant_pool_bytes_ptr = cpool_bytes;
2729
2730 return JVMTI_ERROR_NONE;
2731 } /* end GetConstantPool */
2732
2733
2734 // k_mirror - may be primitive, this must be checked
2735 // is_interface_ptr - pre-checked for NULL
2736 jvmtiError
2737 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2738 {
2739 bool result = false;
2740 if (!java_lang_Class::is_primitive(k_mirror)) {
2741 Klass* k = java_lang_Class::as_Klass(k_mirror);
2742 if (k != NULL && k->is_interface()) {
2743 result = true;
2744 }
2745 }
2746 *is_interface_ptr = result;
2747 }
2748
2749 return JVMTI_ERROR_NONE;
2750 } /* end IsInterface */
2751
2752
2753 // k_mirror - may be primitive, this must be checked
2754 // is_array_class_ptr - pre-checked for NULL
2755 jvmtiError
2756 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2757 {
2758 bool result = false;
2759 if (!java_lang_Class::is_primitive(k_mirror)) {
2760 Klass* k = java_lang_Class::as_Klass(k_mirror);
2761 if (k != NULL && k->is_array_klass()) {
2762 result = true;
2763 }
2764 }
2765 *is_array_class_ptr = result;
2766 }
2767
2768 return JVMTI_ERROR_NONE;
2769 } /* end IsArrayClass */
2770
2771
2772 // k_mirror - may be primitive, this must be checked
2773 // classloader_ptr - pre-checked for NULL
2774 jvmtiError
2775 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2776 {
2777 if (java_lang_Class::is_primitive(k_mirror)) {
2778 *classloader_ptr = (jclass) jni_reference(Handle());
2779 return JVMTI_ERROR_NONE;
2780 }
2781 JavaThread* current_thread = JavaThread::current();
2782 HandleMark hm(current_thread);
2783 Klass* k = java_lang_Class::as_Klass(k_mirror);
2784 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2785
2786 oop result_oop = k->class_loader();
2787 if (result_oop == NULL) {
2788 *classloader_ptr = (jclass) jni_reference(Handle());
2789 return JVMTI_ERROR_NONE;
2790 }
2791 Handle result_handle = Handle(current_thread, result_oop);
2792 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2793 *classloader_ptr = result_jnihandle;
2794 }
2795 return JVMTI_ERROR_NONE;
2796 } /* end GetClassLoader */
2797
2798
2799 // k_mirror - may be primitive, this must be checked
2800 // source_debug_extension_ptr - pre-checked for NULL
2801 jvmtiError
2802 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2803 {
2804 if (java_lang_Class::is_primitive(k_mirror)) {
2805 return JVMTI_ERROR_ABSENT_INFORMATION;
2806 }
2807 Klass* k = java_lang_Class::as_Klass(k_mirror);
2808 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2809 if (!k->is_instance_klass()) {
2810 return JVMTI_ERROR_ABSENT_INFORMATION;
2811 }
2812 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2813 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2814
2815 {
2816 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2817 strcpy(*source_debug_extension_ptr, sde);
2818 }
2819 }
2820
2821 return JVMTI_ERROR_NONE;
2822 } /* end GetSourceDebugExtension */
2823
2824 //
2825 // Object functions
2826 //
2827
2828 // hash_code_ptr - pre-checked for NULL
2829 jvmtiError
2830 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2831 oop mirror = JNIHandles::resolve_external_guard(object);
2832 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2833 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2834
2835 {
2836 jint result = (jint) mirror->identity_hash();
2837 *hash_code_ptr = result;
2838 }
2839 return JVMTI_ERROR_NONE;
2840 } /* end GetObjectHashCode */
2841
2842
2843 // info_ptr - pre-checked for NULL
2844 jvmtiError
2845 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2846 JavaThread* calling_thread = JavaThread::current();
2847 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2848 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2849 // Some of the critical threads were not suspended. go to a safepoint and try again
2850 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2851 VMThread::execute(&op);
2852 err = op.result();
2853 }
2854 return err;
2855 } /* end GetObjectMonitorUsage */
2856
2857
2858 //
2859 // Field functions
2860 //
2861
2862 // name_ptr - NULL is a valid value, must be checked
2863 // signature_ptr - NULL is a valid value, must be checked
2864 // generic_ptr - NULL is a valid value, must be checked
2865 jvmtiError
2866 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2867 JavaThread* current_thread = JavaThread::current();
2868 ResourceMark rm(current_thread);
2869 if (name_ptr == NULL) {
2870 // just don't return the name
2871 } else {
2872 const char* fieldName = fdesc_ptr->name()->as_C_string();
2873 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2874 if (*name_ptr == NULL)
2875 return JVMTI_ERROR_OUT_OF_MEMORY;
2876 strcpy(*name_ptr, fieldName);
2877 }
2878 if (signature_ptr== NULL) {
2879 // just don't return the signature
2880 } else {
2881 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2882 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2883 if (*signature_ptr == NULL)
2884 return JVMTI_ERROR_OUT_OF_MEMORY;
2885 strcpy(*signature_ptr, fieldSignature);
2886 }
2887 if (generic_ptr != NULL) {
2888 *generic_ptr = NULL;
2889 Symbol* soop = fdesc_ptr->generic_signature();
2890 if (soop != NULL) {
2891 const char* gen_sig = soop->as_C_string();
2892 if (gen_sig != NULL) {
2893 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2894 if (err != JVMTI_ERROR_NONE) {
2895 return err;
2896 }
2897 strcpy(*generic_ptr, gen_sig);
2898 }
2899 }
2900 }
2901 return JVMTI_ERROR_NONE;
2902 } /* end GetFieldName */
2903
2904
2905 // declaring_class_ptr - pre-checked for NULL
2906 jvmtiError
2907 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2908
2909 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2910 return JVMTI_ERROR_NONE;
2911 } /* end GetFieldDeclaringClass */
2912
2913
2914 // modifiers_ptr - pre-checked for NULL
2915 jvmtiError
2916 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2917
2918 AccessFlags resultFlags = fdesc_ptr->access_flags();
2919 jint result = resultFlags.as_int();
2920 *modifiers_ptr = result;
2921
2922 return JVMTI_ERROR_NONE;
2923 } /* end GetFieldModifiers */
2924
2925
2926 // is_synthetic_ptr - pre-checked for NULL
2927 jvmtiError
2928 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2929 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2930 return JVMTI_ERROR_NONE;
2931 } /* end IsFieldSynthetic */
2932
2933
2934 //
2935 // Method functions
2936 //
2937
2938 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2939 // name_ptr - NULL is a valid value, must be checked
2940 // signature_ptr - NULL is a valid value, must be checked
2941 // generic_ptr - NULL is a valid value, must be checked
2942 jvmtiError
2943 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2944 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2945 JavaThread* current_thread = JavaThread::current();
2946
2947 ResourceMark rm(current_thread); // get the utf8 name and signature
2948 if (name_ptr == NULL) {
2949 // just don't return the name
2950 } else {
2951 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2952 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2953 strcpy(*name_ptr, utf8_name);
2954 }
2955 if (signature_ptr == NULL) {
2956 // just don't return the signature
2957 } else {
2958 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2959 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2960 strcpy(*signature_ptr, utf8_signature);
2961 }
2962
2963 if (generic_ptr != NULL) {
2964 *generic_ptr = NULL;
2965 Symbol* soop = method_oop->generic_signature();
2966 if (soop != NULL) {
2967 const char* gen_sig = soop->as_C_string();
2968 if (gen_sig != NULL) {
2969 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2970 if (err != JVMTI_ERROR_NONE) {
2971 return err;
2972 }
2973 strcpy(*generic_ptr, gen_sig);
2974 }
2975 }
2976 }
2977 return JVMTI_ERROR_NONE;
2978 } /* end GetMethodName */
2979
2980
2981 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2982 // declaring_class_ptr - pre-checked for NULL
2983 jvmtiError
2984 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2985 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2986 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2987 return JVMTI_ERROR_NONE;
2988 } /* end GetMethodDeclaringClass */
2989
2990
2991 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2992 // modifiers_ptr - pre-checked for NULL
2993 jvmtiError
2994 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2995 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2996 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2997 return JVMTI_ERROR_NONE;
2998 } /* end GetMethodModifiers */
2999
3000
3001 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3002 // max_ptr - pre-checked for NULL
3003 jvmtiError
3004 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
3005 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3006 // get max stack
3007 (*max_ptr) = method_oop->max_locals();
3008 return JVMTI_ERROR_NONE;
3009 } /* end GetMaxLocals */
3010
3011
3012 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3013 // size_ptr - pre-checked for NULL
3014 jvmtiError
3015 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3016 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3017 // get size of arguments
3018
3019 (*size_ptr) = method_oop->size_of_parameters();
3020 return JVMTI_ERROR_NONE;
3021 } /* end GetArgumentsSize */
3022
3023
3024 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3025 // entry_count_ptr - pre-checked for NULL
3026 // table_ptr - pre-checked for NULL
3027 jvmtiError
3028 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3029 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3030 if (!method_oop->has_linenumber_table()) {
3031 return (JVMTI_ERROR_ABSENT_INFORMATION);
3032 }
3033
3034 // The line number table is compressed so we don't know how big it is until decompressed.
3035 // Decompression is really fast so we just do it twice.
3036
3037 // Compute size of table
3038 jint num_entries = 0;
3039 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3040 while (stream.read_pair()) {
3041 num_entries++;
3042 }
3043 jvmtiLineNumberEntry *jvmti_table =
3044 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3045
3046 // Fill jvmti table
3047 if (num_entries > 0) {
3048 int index = 0;
3049 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3050 while (stream.read_pair()) {
3051 jvmti_table[index].start_location = (jlocation) stream.bci();
3052 jvmti_table[index].line_number = (jint) stream.line();
3053 index++;
3054 }
3055 assert(index == num_entries, "sanity check");
3056 }
3057
3058 // Set up results
3059 (*entry_count_ptr) = num_entries;
3060 (*table_ptr) = jvmti_table;
3061
3062 return JVMTI_ERROR_NONE;
3063 } /* end GetLineNumberTable */
3064
3065
3066 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3067 // start_location_ptr - pre-checked for NULL
3068 // end_location_ptr - pre-checked for NULL
3069 jvmtiError
3070 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3071
3072 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3073 // get start and end location
3074 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3075 if (method_oop->code_size() == 0) {
3076 // there is no code so there is no start location
3077 (*start_location_ptr) = (jlocation)(-1);
3078 } else {
3079 (*start_location_ptr) = (jlocation)(0);
3080 }
3081
3082 return JVMTI_ERROR_NONE;
3083 } /* end GetMethodLocation */
3084
3085
3086 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3087 // entry_count_ptr - pre-checked for NULL
3088 // table_ptr - pre-checked for NULL
3089 jvmtiError
3090 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3091
3092 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3093 JavaThread* current_thread = JavaThread::current();
3094
3095 // does the klass have any local variable information?
3096 InstanceKlass* ik = method_oop->method_holder();
3097 if (!ik->access_flags().has_localvariable_table()) {
3098 return (JVMTI_ERROR_ABSENT_INFORMATION);
3099 }
3100
3101 ConstantPool* constants = method_oop->constants();
3102 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3103
3104 // in the vm localvariable table representation, 6 consecutive elements in the table
3105 // represent a 6-tuple of shorts
3106 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3107 jint num_entries = method_oop->localvariable_table_length();
3108 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3109 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3110
3111 if (num_entries > 0) {
3112 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3113 for (int i = 0; i < num_entries; i++) {
3114 // get the 5 tuple information from the vm table
3115 jlocation start_location = (jlocation) table[i].start_bci;
3116 jint length = (jint) table[i].length;
3117 int name_index = (int) table[i].name_cp_index;
3118 int signature_index = (int) table[i].descriptor_cp_index;
3119 int generic_signature_index = (int) table[i].signature_cp_index;
3120 jint slot = (jint) table[i].slot;
3121
3122 // get utf8 name and signature
3123 char *name_buf = NULL;
3124 char *sig_buf = NULL;
3125 char *gen_sig_buf = NULL;
3126 {
3127 ResourceMark rm(current_thread);
3128
3129 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3130 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3131 strcpy(name_buf, utf8_name);
3132
3133 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3134 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3135 strcpy(sig_buf, utf8_signature);
3136
3137 if (generic_signature_index > 0) {
3138 const char *utf8_gen_sign = (const char *)
3139 constants->symbol_at(generic_signature_index)->as_utf8();
3140 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3141 strcpy(gen_sig_buf, utf8_gen_sign);
3142 }
3143 }
3144
3145 // fill in the jvmti local variable table
3146 jvmti_table[i].start_location = start_location;
3147 jvmti_table[i].length = length;
3148 jvmti_table[i].name = name_buf;
3149 jvmti_table[i].signature = sig_buf;
3150 jvmti_table[i].generic_signature = gen_sig_buf;
3151 jvmti_table[i].slot = slot;
3152 }
3153 }
3154
3155 // set results
3156 (*entry_count_ptr) = num_entries;
3157 (*table_ptr) = jvmti_table;
3158
3159 return JVMTI_ERROR_NONE;
3160 } /* end GetLocalVariableTable */
3161
3162
3163 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3164 // bytecode_count_ptr - pre-checked for NULL
3165 // bytecodes_ptr - pre-checked for NULL
3166 jvmtiError
3167 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3168 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3169
3170 HandleMark hm;
3171 methodHandle method(method_oop);
3172 jint size = (jint)method->code_size();
3173 jvmtiError err = allocate(size, bytecodes_ptr);
3174 if (err != JVMTI_ERROR_NONE) {
3175 return err;
3176 }
3177
3178 (*bytecode_count_ptr) = size;
3179 // get byte codes
3180 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3181
3182 return JVMTI_ERROR_NONE;
3183 } /* end GetBytecodes */
3184
3185
3186 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3187 // is_native_ptr - pre-checked for NULL
3188 jvmtiError
3189 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3190 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3191 (*is_native_ptr) = method_oop->is_native();
3192 return JVMTI_ERROR_NONE;
3193 } /* end IsMethodNative */
3194
3195
3196 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3197 // is_synthetic_ptr - pre-checked for NULL
3198 jvmtiError
3199 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3200 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3201 (*is_synthetic_ptr) = method_oop->is_synthetic();
3202 return JVMTI_ERROR_NONE;
3203 } /* end IsMethodSynthetic */
3204
3205
3206 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3207 // is_obsolete_ptr - pre-checked for NULL
3208 jvmtiError
3209 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3210 if (use_version_1_0_semantics() &&
3211 get_capabilities()->can_redefine_classes == 0) {
3212 // This JvmtiEnv requested version 1.0 semantics and this function
3213 // requires the can_redefine_classes capability in version 1.0 so
3214 // we need to return an error here.
3215 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3216 }
3217
3218 if (method_oop == NULL || method_oop->is_obsolete()) {
3219 *is_obsolete_ptr = true;
3220 } else {
3221 *is_obsolete_ptr = false;
3222 }
3223 return JVMTI_ERROR_NONE;
3224 } /* end IsMethodObsolete */
3225
3226 //
3227 // Raw Monitor functions
3228 //
3229
3230 // name - pre-checked for NULL
3231 // monitor_ptr - pre-checked for NULL
3232 jvmtiError
3233 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3234 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3235 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3236
3237 *monitor_ptr = (jrawMonitorID)rmonitor;
3238
3239 return JVMTI_ERROR_NONE;
3240 } /* end CreateRawMonitor */
3241
3242
3243 // rmonitor - pre-checked for validity
3244 jvmtiError
3245 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3246 if (Threads::number_of_threads() == 0) {
3247 // Remove this monitor from pending raw monitors list
3248 // if it has entered in onload or start phase.
3249 JvmtiPendingMonitors::destroy(rmonitor);
3250 } else {
3251 Thread* thread = Thread::current();
3252 if (rmonitor->is_entered(thread)) {
3253 // The caller owns this monitor which we are about to destroy.
3254 // We exit the underlying synchronization object so that the
3255 // "delete monitor" call below can work without an assertion
3256 // failure on systems that don't like destroying synchronization
3257 // objects that are locked.
3258 int r;
3259 intptr_t recursion = rmonitor->recursions();
3260 for (intptr_t i=0; i <= recursion; i++) {
3261 r = rmonitor->raw_exit(thread);
3262 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3263 if (r != ObjectMonitor::OM_OK) { // robustness
3264 return JVMTI_ERROR_INTERNAL;
3265 }
3266 }
3267 }
3268 if (rmonitor->owner() != NULL) {
3269 // The caller is trying to destroy a monitor that is locked by
3270 // someone else. While this is not forbidden by the JVMTI
3271 // spec, it will cause an assertion failure on systems that don't
3272 // like destroying synchronization objects that are locked.
3273 // We indicate a problem with the error return (and leak the
3274 // monitor's memory).
3275 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3276 }
3277 }
3278
3279 delete rmonitor;
3280
3281 return JVMTI_ERROR_NONE;
3282 } /* end DestroyRawMonitor */
3283
3284
3285 // rmonitor - pre-checked for validity
3286 jvmtiError
3287 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3288 if (Threads::number_of_threads() == 0) {
3289 // No JavaThreads exist so ObjectMonitor enter cannot be
3290 // used, add this raw monitor to the pending list.
3291 // The pending monitors will be actually entered when
3292 // the VM is setup.
3293 // See transition_pending_raw_monitors in create_vm()
3294 // in thread.cpp.
3295 JvmtiPendingMonitors::enter(rmonitor);
3296 } else {
3297 int r = 0;
3298 Thread* thread = Thread::current();
3299
3300 if (thread->is_Java_thread()) {
3301 JavaThread* current_thread = (JavaThread*)thread;
3302
3303 #ifdef PROPER_TRANSITIONS
3304 // Not really unknown but ThreadInVMfromNative does more than we want
3305 ThreadInVMfromUnknown __tiv;
3306 {
3307 ThreadBlockInVM __tbivm(current_thread);
3308 r = rmonitor->raw_enter(current_thread);
3309 }
3310 #else
3311 /* Transition to thread_blocked without entering vm state */
3312 /* This is really evil. Normally you can't undo _thread_blocked */
3313 /* transitions like this because it would cause us to miss a */
3314 /* safepoint but since the thread was already in _thread_in_native */
3315 /* the thread is not leaving a safepoint safe state and it will */
3316 /* block when it tries to return from native. We can't safepoint */
3317 /* block in here because we could deadlock the vmthread. Blech. */
3318
3319 JavaThreadState state = current_thread->thread_state();
3320 assert(state == _thread_in_native, "Must be _thread_in_native");
3321 // frame should already be walkable since we are in native
3322 assert(!current_thread->has_last_Java_frame() ||
3323 current_thread->frame_anchor()->walkable(), "Must be walkable");
3324 current_thread->set_thread_state(_thread_blocked);
3325
3326 r = rmonitor->raw_enter(current_thread);
3327 // restore state, still at a safepoint safe state
3328 current_thread->set_thread_state(state);
3329
3330 #endif /* PROPER_TRANSITIONS */
3331 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3332 } else {
3333 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3334 r = rmonitor->raw_enter(thread);
3335 } else {
3336 ShouldNotReachHere();
3337 }
3338 }
3339
3340 if (r != ObjectMonitor::OM_OK) { // robustness
3341 return JVMTI_ERROR_INTERNAL;
3342 }
3343 }
3344 return JVMTI_ERROR_NONE;
3345 } /* end RawMonitorEnter */
3346
3347
3348 // rmonitor - pre-checked for validity
3349 jvmtiError
3350 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3351 jvmtiError err = JVMTI_ERROR_NONE;
3352
3353 if (Threads::number_of_threads() == 0) {
3354 // No JavaThreads exist so just remove this monitor from the pending list.
3355 // Bool value from exit is false if rmonitor is not in the list.
3356 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3357 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3358 }
3359 } else {
3360 int r = 0;
3361 Thread* thread = Thread::current();
3362
3363 if (thread->is_Java_thread()) {
3364 JavaThread* current_thread = (JavaThread*)thread;
3365 #ifdef PROPER_TRANSITIONS
3366 // Not really unknown but ThreadInVMfromNative does more than we want
3367 ThreadInVMfromUnknown __tiv;
3368 #endif /* PROPER_TRANSITIONS */
3369 r = rmonitor->raw_exit(current_thread);
3370 } else {
3371 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3372 r = rmonitor->raw_exit(thread);
3373 } else {
3374 ShouldNotReachHere();
3375 }
3376 }
3377
3378 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3379 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3380 } else {
3381 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3382 if (r != ObjectMonitor::OM_OK) { // robustness
3383 err = JVMTI_ERROR_INTERNAL;
3384 }
3385 }
3386 }
3387 return err;
3388 } /* end RawMonitorExit */
3389
3390
3391 // rmonitor - pre-checked for validity
3392 jvmtiError
3393 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3394 int r = 0;
3395 Thread* thread = Thread::current();
3396
3397 if (thread->is_Java_thread()) {
3398 JavaThread* current_thread = (JavaThread*)thread;
3399 #ifdef PROPER_TRANSITIONS
3400 // Not really unknown but ThreadInVMfromNative does more than we want
3401 ThreadInVMfromUnknown __tiv;
3402 {
3403 ThreadBlockInVM __tbivm(current_thread);
3404 r = rmonitor->raw_wait(millis, true, current_thread);
3405 }
3406 #else
3407 /* Transition to thread_blocked without entering vm state */
3408 /* This is really evil. Normally you can't undo _thread_blocked */
3409 /* transitions like this because it would cause us to miss a */
3410 /* safepoint but since the thread was already in _thread_in_native */
3411 /* the thread is not leaving a safepoint safe state and it will */
3412 /* block when it tries to return from native. We can't safepoint */
3413 /* block in here because we could deadlock the vmthread. Blech. */
3414
3415 JavaThreadState state = current_thread->thread_state();
3416 assert(state == _thread_in_native, "Must be _thread_in_native");
3417 // frame should already be walkable since we are in native
3418 assert(!current_thread->has_last_Java_frame() ||
3419 current_thread->frame_anchor()->walkable(), "Must be walkable");
3420 current_thread->set_thread_state(_thread_blocked);
3421
3422 r = rmonitor->raw_wait(millis, true, current_thread);
3423 // restore state, still at a safepoint safe state
3424 current_thread->set_thread_state(state);
3425
3426 #endif /* PROPER_TRANSITIONS */
3427 } else {
3428 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3429 r = rmonitor->raw_wait(millis, true, thread);
3430 } else {
3431 ShouldNotReachHere();
3432 }
3433 }
3434
3435 switch (r) {
3436 case ObjectMonitor::OM_INTERRUPTED:
3437 return JVMTI_ERROR_INTERRUPT;
3438 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3439 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3440 }
3441 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3442 if (r != ObjectMonitor::OM_OK) { // robustness
3443 return JVMTI_ERROR_INTERNAL;
3444 }
3445
3446 return JVMTI_ERROR_NONE;
3447 } /* end RawMonitorWait */
3448
3449
3450 // rmonitor - pre-checked for validity
3451 jvmtiError
3452 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3453 int r = 0;
3454 Thread* thread = Thread::current();
3455
3456 if (thread->is_Java_thread()) {
3457 JavaThread* current_thread = (JavaThread*)thread;
3458 // Not really unknown but ThreadInVMfromNative does more than we want
3459 ThreadInVMfromUnknown __tiv;
3460 r = rmonitor->raw_notify(current_thread);
3461 } else {
3462 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3463 r = rmonitor->raw_notify(thread);
3464 } else {
3465 ShouldNotReachHere();
3466 }
3467 }
3468
3469 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3470 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3471 }
3472 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3473 if (r != ObjectMonitor::OM_OK) { // robustness
3474 return JVMTI_ERROR_INTERNAL;
3475 }
3476
3477 return JVMTI_ERROR_NONE;
3478 } /* end RawMonitorNotify */
3479
3480
3481 // rmonitor - pre-checked for validity
3482 jvmtiError
3483 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3484 int r = 0;
3485 Thread* thread = Thread::current();
3486
3487 if (thread->is_Java_thread()) {
3488 JavaThread* current_thread = (JavaThread*)thread;
3489 ThreadInVMfromUnknown __tiv;
3490 r = rmonitor->raw_notifyAll(current_thread);
3491 } else {
3492 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3493 r = rmonitor->raw_notifyAll(thread);
3494 } else {
3495 ShouldNotReachHere();
3496 }
3497 }
3498
3499 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3500 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3501 }
3502 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3503 if (r != ObjectMonitor::OM_OK) { // robustness
3504 return JVMTI_ERROR_INTERNAL;
3505 }
3506
3507 return JVMTI_ERROR_NONE;
3508 } /* end RawMonitorNotifyAll */
3509
3510
3511 //
3512 // JNI Function Interception functions
3513 //
3514
3515
3516 // function_table - pre-checked for NULL
3517 jvmtiError
3518 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3519 // Copy jni function table at safepoint.
3520 VM_JNIFunctionTableCopier copier(function_table);
3521 VMThread::execute(&copier);
3522
3523 return JVMTI_ERROR_NONE;
3524 } /* end SetJNIFunctionTable */
3525
3526
3527 // function_table - pre-checked for NULL
3528 jvmtiError
3529 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3530 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3531 if (*function_table == NULL)
3532 return JVMTI_ERROR_OUT_OF_MEMORY;
3533 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3534 return JVMTI_ERROR_NONE;
3535 } /* end GetJNIFunctionTable */
3536
3537
3538 //
3539 // Event Management functions
3540 //
3541
3542 jvmtiError
3543 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3544 // can only generate two event types
3545 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3546 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3547 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3548 }
3549
3550 // for compiled_method_load events we must check that the environment
3551 // has the can_generate_compiled_method_load_events capability.
3552 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3553 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3554 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3555 }
3556 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3557 } else {
3558 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3559 }
3560
3561 } /* end GenerateEvents */
3562
3563
3564 //
3565 // Extension Mechanism functions
3566 //
3567
3568 // extension_count_ptr - pre-checked for NULL
3569 // extensions - pre-checked for NULL
3570 jvmtiError
3571 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3572 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3573 } /* end GetExtensionFunctions */
3574
3575
3576 // extension_count_ptr - pre-checked for NULL
3577 // extensions - pre-checked for NULL
3578 jvmtiError
3579 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3580 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3581 } /* end GetExtensionEvents */
3582
3583
3584 // callback - NULL is a valid value, must be checked
3585 jvmtiError
3586 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3587 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3588 } /* end SetExtensionEventCallback */
3589
3590 //
3591 // Timers functions
3592 //
3593
3594 // info_ptr - pre-checked for NULL
3595 jvmtiError
3596 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3597 os::current_thread_cpu_time_info(info_ptr);
3598 return JVMTI_ERROR_NONE;
3599 } /* end GetCurrentThreadCpuTimerInfo */
3600
3601
3602 // nanos_ptr - pre-checked for NULL
3603 jvmtiError
3604 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3605 *nanos_ptr = os::current_thread_cpu_time();
3606 return JVMTI_ERROR_NONE;
3607 } /* end GetCurrentThreadCpuTime */
3608
3609
3610 // info_ptr - pre-checked for NULL
3611 jvmtiError
3612 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3613 os::thread_cpu_time_info(info_ptr);
3614 return JVMTI_ERROR_NONE;
3615 } /* end GetThreadCpuTimerInfo */
3616
3617
3618 // Threads_lock NOT held, java_thread not protected by lock
3619 // java_thread - pre-checked
3620 // nanos_ptr - pre-checked for NULL
3621 jvmtiError
3622 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3623 *nanos_ptr = os::thread_cpu_time(java_thread);
3624 return JVMTI_ERROR_NONE;
3625 } /* end GetThreadCpuTime */
3626
3627
3628 // info_ptr - pre-checked for NULL
3629 jvmtiError
3630 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3631 os::javaTimeNanos_info(info_ptr);
3632 return JVMTI_ERROR_NONE;
3633 } /* end GetTimerInfo */
3634
3635
3636 // nanos_ptr - pre-checked for NULL
3637 jvmtiError
3638 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3639 *nanos_ptr = os::javaTimeNanos();
3640 return JVMTI_ERROR_NONE;
3641 } /* end GetTime */
3642
3643
3644 // processor_count_ptr - pre-checked for NULL
3645 jvmtiError
3646 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3647 *processor_count_ptr = os::active_processor_count();
3648 return JVMTI_ERROR_NONE;
3649 } /* end GetAvailableProcessors */
3650
3651 jvmtiError
3652 JvmtiEnv::SetHeapSamplingRate(jint sampling_rate) {
3653 if (sampling_rate < 0) {
3654 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3655 }
3656 ThreadHeapSampler::set_tlab_heap_sampling(sampling_rate);
3657 return JVMTI_ERROR_NONE;
3658 } /* end SetHeapSamplingRate */
3659
3660 //
3661 // System Properties functions
3662 //
3663
3664 // count_ptr - pre-checked for NULL
3665 // property_ptr - pre-checked for NULL
3666 jvmtiError
3667 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3668 jvmtiError err = JVMTI_ERROR_NONE;
3669
3670 // Get the number of readable properties.
3671 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3672
3673 // Allocate memory to hold the exact number of readable properties.
3674 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3675 if (err != JVMTI_ERROR_NONE) {
3676 return err;
3677 }
3678 int readable_count = 0;
3679 // Loop through the system properties until all the readable properties are found.
3680 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3681 if (p->is_readable()) {
3682 const char *key = p->key();
3683 char **tmp_value = *property_ptr+readable_count;
3684 readable_count++;
3685 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3686 if (err == JVMTI_ERROR_NONE) {
3687 strcpy(*tmp_value, key);
3688 } else {
3689 // clean up previously allocated memory.
3690 for (int j=0; j<readable_count; j++) {
3691 Deallocate((unsigned char*)*property_ptr+j);
3692 }
3693 Deallocate((unsigned char*)property_ptr);
3694 break;
3695 }
3696 }
3697 }
3698 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3699 return err;
3700 } /* end GetSystemProperties */
3701
3702
3703 // property - pre-checked for NULL
3704 // value_ptr - pre-checked for NULL
3705 jvmtiError
3706 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3707 jvmtiError err = JVMTI_ERROR_NONE;
3708 const char *value;
3709
3710 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3711 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3712 if (value == NULL) {
3713 err = JVMTI_ERROR_NOT_AVAILABLE;
3714 } else {
3715 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3716 if (err == JVMTI_ERROR_NONE) {
3717 strcpy(*value_ptr, value);
3718 }
3719 }
3720 return err;
3721 } /* end GetSystemProperty */
3722
3723
3724 // property - pre-checked for NULL
3725 // value - NULL is a valid value, must be checked
3726 jvmtiError
3727 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3728 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3729
3730 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3731 if (strcmp(property, p->key()) == 0) {
3732 if (p->set_writeable_value(value_ptr)) {
3733 err = JVMTI_ERROR_NONE;
3734 }
3735 }
3736 }
3737 return err;
3738 } /* end SetSystemProperty */