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