1 /*
2 * Copyright (c) 2003, 2016, 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 Thread *thread = Thread::current();
1800 HandleMark hm(thread);
1801 KlassHandle kh (thread, k_oop);
1802
1803 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1804 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1805 return JVMTI_ERROR_NONE;
1806 } /* end FollowReferences */
1807
1808
1809 // klass - NULL is a valid value, must be checked
1810 // callbacks - pre-checked for NULL
1811 // user_data - NULL is a valid value, must be checked
1812 jvmtiError
1813 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1814 // check klass if provided
1815 Klass* k_oop = NULL;
1816 if (klass != NULL) {
1817 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1818 if (k_mirror == NULL) {
1819 return JVMTI_ERROR_INVALID_CLASS;
1820 }
1821 if (java_lang_Class::is_primitive(k_mirror)) {
1822 return JVMTI_ERROR_NONE;
1823 }
1824 k_oop = java_lang_Class::as_Klass(k_mirror);
1825 if (k_oop == NULL) {
1826 return JVMTI_ERROR_INVALID_CLASS;
1827 }
1828 }
1829
1830 Thread *thread = Thread::current();
1831 HandleMark hm(thread);
1832 KlassHandle kh (thread, k_oop);
1833
1834 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1835 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1836 return JVMTI_ERROR_NONE;
1837 } /* end IterateThroughHeap */
1838
1839
1840 // tag_ptr - pre-checked for NULL
1841 jvmtiError
1842 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1843 oop o = JNIHandles::resolve_external_guard(object);
1844 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1845 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1846 return JVMTI_ERROR_NONE;
1847 } /* end GetTag */
1848
1849
1850 jvmtiError
1851 JvmtiEnv::SetTag(jobject object, jlong tag) {
1852 oop o = JNIHandles::resolve_external_guard(object);
1853 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1854 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1855 return JVMTI_ERROR_NONE;
1856 } /* end SetTag */
1857
1858
1859 // tag_count - pre-checked to be greater than or equal to 0
1860 // tags - pre-checked for NULL
1861 // count_ptr - pre-checked for NULL
1862 // object_result_ptr - NULL is a valid value, must be checked
1863 // tag_result_ptr - NULL is a valid value, must be checked
1864 jvmtiError
1865 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1866 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1867 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1868 } /* end GetObjectsWithTags */
1869
1870
1871 jvmtiError
1872 JvmtiEnv::ForceGarbageCollection() {
1873 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1874 return JVMTI_ERROR_NONE;
1875 } /* end ForceGarbageCollection */
1876
1877
1878 //
1879 // Heap (1.0) functions
1880 //
1881
1882 // object_reference_callback - pre-checked for NULL
1883 // user_data - NULL is a valid value, must be checked
1884 jvmtiError
1885 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1886 oop o = JNIHandles::resolve_external_guard(object);
1887 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1888 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1889 return JVMTI_ERROR_NONE;
1890 } /* end IterateOverObjectsReachableFromObject */
1891
1892
1893 // heap_root_callback - NULL is a valid value, must be checked
1894 // stack_ref_callback - NULL is a valid value, must be checked
1895 // object_ref_callback - NULL is a valid value, must be checked
1896 // user_data - NULL is a valid value, must be checked
1897 jvmtiError
1898 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1899 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1900 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1901 return JVMTI_ERROR_NONE;
1902 } /* end IterateOverReachableObjects */
1903
1904
1905 // heap_object_callback - pre-checked for NULL
1906 // user_data - NULL is a valid value, must be checked
1907 jvmtiError
1908 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1909 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1910 Thread *thread = Thread::current();
1911 HandleMark hm(thread);
1912 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1913 return JVMTI_ERROR_NONE;
1914 } /* end IterateOverHeap */
1915
1916
1917 // k_mirror - may be primitive, this must be checked
1918 // heap_object_callback - pre-checked for NULL
1919 // user_data - NULL is a valid value, must be checked
1920 jvmtiError
1921 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1922 if (java_lang_Class::is_primitive(k_mirror)) {
1923 // DO PRIMITIVE CLASS PROCESSING
1924 return JVMTI_ERROR_NONE;
1925 }
1926 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1927 if (k_oop == NULL) {
1928 return JVMTI_ERROR_INVALID_CLASS;
1929 }
1930 Thread *thread = Thread::current();
1931 HandleMark hm(thread);
1932 KlassHandle klass (thread, k_oop);
1933 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
1934 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1935 return JVMTI_ERROR_NONE;
1936 } /* end IterateOverInstancesOfClass */
1937
1938
1939 //
1940 // Local Variable functions
1941 //
1942
1943 // Threads_lock NOT held, java_thread not protected by lock
1944 // java_thread - pre-checked
1945 // java_thread - unchecked
1946 // depth - pre-checked as non-negative
1947 // value_ptr - pre-checked for NULL
1948 jvmtiError
1949 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1950 JavaThread* current_thread = JavaThread::current();
1951 // rm object is created to clean up the javaVFrame created in
1952 // doit_prologue(), but after doit() is finished with it.
1953 ResourceMark rm(current_thread);
1954
1955 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1956 VMThread::execute(&op);
1957 jvmtiError err = op.result();
1958 if (err != JVMTI_ERROR_NONE) {
1959 return err;
1960 } else {
1961 *value_ptr = op.value().l;
1962 return JVMTI_ERROR_NONE;
1963 }
1964 } /* end GetLocalObject */
1965
1966 // Threads_lock NOT held, java_thread not protected by lock
1967 // java_thread - pre-checked
1968 // java_thread - unchecked
1969 // depth - pre-checked as non-negative
1970 // value - pre-checked for NULL
1971 jvmtiError
1972 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1973 JavaThread* current_thread = JavaThread::current();
1974 // rm object is created to clean up the javaVFrame created in
1975 // doit_prologue(), but after doit() is finished with it.
1976 ResourceMark rm(current_thread);
1977
1978 VM_GetReceiver op(java_thread, current_thread, depth);
1979 VMThread::execute(&op);
1980 jvmtiError err = op.result();
1981 if (err != JVMTI_ERROR_NONE) {
1982 return err;
1983 } else {
1984 *value_ptr = op.value().l;
1985 return JVMTI_ERROR_NONE;
1986 }
1987 } /* end GetLocalInstance */
1988
1989
1990 // Threads_lock NOT held, java_thread not protected by lock
1991 // java_thread - pre-checked
1992 // java_thread - unchecked
1993 // depth - pre-checked as non-negative
1994 // value_ptr - pre-checked for NULL
1995 jvmtiError
1996 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1997 // rm object is created to clean up the javaVFrame created in
1998 // doit_prologue(), but after doit() is finished with it.
1999 ResourceMark rm;
2000
2001 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2002 VMThread::execute(&op);
2003 *value_ptr = op.value().i;
2004 return op.result();
2005 } /* end GetLocalInt */
2006
2007
2008 // Threads_lock NOT held, java_thread not protected by lock
2009 // java_thread - pre-checked
2010 // java_thread - unchecked
2011 // depth - pre-checked as non-negative
2012 // value_ptr - pre-checked for NULL
2013 jvmtiError
2014 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2015 // rm object is created to clean up the javaVFrame created in
2016 // doit_prologue(), but after doit() is finished with it.
2017 ResourceMark rm;
2018
2019 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2020 VMThread::execute(&op);
2021 *value_ptr = op.value().j;
2022 return op.result();
2023 } /* end GetLocalLong */
2024
2025
2026 // Threads_lock NOT held, java_thread not protected by lock
2027 // java_thread - pre-checked
2028 // java_thread - unchecked
2029 // depth - pre-checked as non-negative
2030 // value_ptr - pre-checked for NULL
2031 jvmtiError
2032 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2033 // rm object is created to clean up the javaVFrame created in
2034 // doit_prologue(), but after doit() is finished with it.
2035 ResourceMark rm;
2036
2037 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2038 VMThread::execute(&op);
2039 *value_ptr = op.value().f;
2040 return op.result();
2041 } /* end GetLocalFloat */
2042
2043
2044 // Threads_lock NOT held, java_thread not protected by lock
2045 // java_thread - pre-checked
2046 // java_thread - unchecked
2047 // depth - pre-checked as non-negative
2048 // value_ptr - pre-checked for NULL
2049 jvmtiError
2050 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2051 // rm object is created to clean up the javaVFrame created in
2052 // doit_prologue(), but after doit() is finished with it.
2053 ResourceMark rm;
2054
2055 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2056 VMThread::execute(&op);
2057 *value_ptr = op.value().d;
2058 return op.result();
2059 } /* end GetLocalDouble */
2060
2061
2062 // Threads_lock NOT held, java_thread not protected by lock
2063 // java_thread - pre-checked
2064 // java_thread - unchecked
2065 // depth - pre-checked as non-negative
2066 jvmtiError
2067 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2068 // rm object is created to clean up the javaVFrame created in
2069 // doit_prologue(), but after doit() is finished with it.
2070 ResourceMark rm;
2071 jvalue val;
2072 val.l = value;
2073 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2074 VMThread::execute(&op);
2075 return op.result();
2076 } /* end SetLocalObject */
2077
2078
2079 // Threads_lock NOT held, java_thread not protected by lock
2080 // java_thread - pre-checked
2081 // java_thread - unchecked
2082 // depth - pre-checked as non-negative
2083 jvmtiError
2084 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2085 // rm object is created to clean up the javaVFrame created in
2086 // doit_prologue(), but after doit() is finished with it.
2087 ResourceMark rm;
2088 jvalue val;
2089 val.i = value;
2090 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2091 VMThread::execute(&op);
2092 return op.result();
2093 } /* end SetLocalInt */
2094
2095
2096 // Threads_lock NOT held, java_thread not protected by lock
2097 // java_thread - pre-checked
2098 // java_thread - unchecked
2099 // depth - pre-checked as non-negative
2100 jvmtiError
2101 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2102 // rm object is created to clean up the javaVFrame created in
2103 // doit_prologue(), but after doit() is finished with it.
2104 ResourceMark rm;
2105 jvalue val;
2106 val.j = value;
2107 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2108 VMThread::execute(&op);
2109 return op.result();
2110 } /* end SetLocalLong */
2111
2112
2113 // Threads_lock NOT held, java_thread not protected by lock
2114 // java_thread - pre-checked
2115 // java_thread - unchecked
2116 // depth - pre-checked as non-negative
2117 jvmtiError
2118 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2119 // rm object is created to clean up the javaVFrame created in
2120 // doit_prologue(), but after doit() is finished with it.
2121 ResourceMark rm;
2122 jvalue val;
2123 val.f = value;
2124 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2125 VMThread::execute(&op);
2126 return op.result();
2127 } /* end SetLocalFloat */
2128
2129
2130 // Threads_lock NOT held, java_thread not protected by lock
2131 // java_thread - pre-checked
2132 // java_thread - unchecked
2133 // depth - pre-checked as non-negative
2134 jvmtiError
2135 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2136 // rm object is created to clean up the javaVFrame created in
2137 // doit_prologue(), but after doit() is finished with it.
2138 ResourceMark rm;
2139 jvalue val;
2140 val.d = value;
2141 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2142 VMThread::execute(&op);
2143 return op.result();
2144 } /* end SetLocalDouble */
2145
2146
2147 //
2148 // Breakpoint functions
2149 //
2150
2151 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2152 jvmtiError
2153 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2154 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2155 if (location < 0) { // simple invalid location check first
2156 return JVMTI_ERROR_INVALID_LOCATION;
2157 }
2158 // verify that the breakpoint is not past the end of the method
2159 if (location >= (jlocation) method_oop->code_size()) {
2160 return JVMTI_ERROR_INVALID_LOCATION;
2161 }
2162
2163 ResourceMark rm;
2164 JvmtiBreakpoint bp(method_oop, location);
2165 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2166 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2167 return JVMTI_ERROR_DUPLICATE;
2168
2169 if (TraceJVMTICalls) {
2170 jvmti_breakpoints.print();
2171 }
2172
2173 return JVMTI_ERROR_NONE;
2174 } /* end SetBreakpoint */
2175
2176
2177 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2178 jvmtiError
2179 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2180 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2181
2182 if (location < 0) { // simple invalid location check first
2183 return JVMTI_ERROR_INVALID_LOCATION;
2184 }
2185
2186 // verify that the breakpoint is not past the end of the method
2187 if (location >= (jlocation) method_oop->code_size()) {
2188 return JVMTI_ERROR_INVALID_LOCATION;
2189 }
2190
2191 JvmtiBreakpoint bp(method_oop, location);
2192
2193 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2194 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2195 return JVMTI_ERROR_NOT_FOUND;
2196
2197 if (TraceJVMTICalls) {
2198 jvmti_breakpoints.print();
2199 }
2200
2201 return JVMTI_ERROR_NONE;
2202 } /* end ClearBreakpoint */
2203
2204
2205 //
2206 // Watched Field functions
2207 //
2208
2209 jvmtiError
2210 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2211 // make sure we haven't set this watch before
2212 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2213 fdesc_ptr->set_is_field_access_watched(true);
2214
2215 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2216
2217 return JVMTI_ERROR_NONE;
2218 } /* end SetFieldAccessWatch */
2219
2220
2221 jvmtiError
2222 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2223 // make sure we have a watch to clear
2224 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2225 fdesc_ptr->set_is_field_access_watched(false);
2226
2227 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2228
2229 return JVMTI_ERROR_NONE;
2230 } /* end ClearFieldAccessWatch */
2231
2232
2233 jvmtiError
2234 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2235 // make sure we haven't set this watch before
2236 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2237 fdesc_ptr->set_is_field_modification_watched(true);
2238
2239 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2240
2241 return JVMTI_ERROR_NONE;
2242 } /* end SetFieldModificationWatch */
2243
2244
2245 jvmtiError
2246 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2247 // make sure we have a watch to clear
2248 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2249 fdesc_ptr->set_is_field_modification_watched(false);
2250
2251 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2252
2253 return JVMTI_ERROR_NONE;
2254 } /* end ClearFieldModificationWatch */
2255
2256 //
2257 // Class functions
2258 //
2259
2260
2261 // k_mirror - may be primitive, this must be checked
2262 // signature_ptr - NULL is a valid value, must be checked
2263 // generic_ptr - NULL is a valid value, must be checked
2264 jvmtiError
2265 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2266 ResourceMark rm;
2267 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2268 Klass* k = NULL;
2269 if (!isPrimitive) {
2270 k = java_lang_Class::as_Klass(k_mirror);
2271 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2272 }
2273 if (signature_ptr != NULL) {
2274 char* result = NULL;
2275 if (isPrimitive) {
2276 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2277 result = (char*) jvmtiMalloc(2);
2278 result[0] = tchar;
2279 result[1] = '\0';
2280 } else {
2281 const char* class_sig = k->signature_name();
2282 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2283 strcpy(result, class_sig);
2284 }
2285 *signature_ptr = result;
2286 }
2287 if (generic_ptr != NULL) {
2288 *generic_ptr = NULL;
2289 if (!isPrimitive && k->is_instance_klass()) {
2290 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2291 if (soo != NULL) {
2292 const char *gen_sig = soo->as_C_string();
2293 if (gen_sig != NULL) {
2294 char* gen_result;
2295 jvmtiError err = allocate(strlen(gen_sig) + 1,
2296 (unsigned char **)&gen_result);
2297 if (err != JVMTI_ERROR_NONE) {
2298 return err;
2299 }
2300 strcpy(gen_result, gen_sig);
2301 *generic_ptr = gen_result;
2302 }
2303 }
2304 }
2305 }
2306 return JVMTI_ERROR_NONE;
2307 } /* end GetClassSignature */
2308
2309
2310 // k_mirror - may be primitive, this must be checked
2311 // status_ptr - pre-checked for NULL
2312 jvmtiError
2313 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2314 jint result = 0;
2315 if (java_lang_Class::is_primitive(k_mirror)) {
2316 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2317 } else {
2318 Klass* k = java_lang_Class::as_Klass(k_mirror);
2319 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2320 result = k->jvmti_class_status();
2321 }
2322 *status_ptr = result;
2323
2324 return JVMTI_ERROR_NONE;
2325 } /* end GetClassStatus */
2326
2327
2328 // k_mirror - may be primitive, this must be checked
2329 // source_name_ptr - pre-checked for NULL
2330 jvmtiError
2331 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2332 if (java_lang_Class::is_primitive(k_mirror)) {
2333 return JVMTI_ERROR_ABSENT_INFORMATION;
2334 }
2335 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2336 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2337
2338 if (!k_klass->is_instance_klass()) {
2339 return JVMTI_ERROR_ABSENT_INFORMATION;
2340 }
2341
2342 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2343 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2344 {
2345 JavaThread* current_thread = JavaThread::current();
2346 ResourceMark rm(current_thread);
2347 const char* sfncp = (const char*) sfnOop->as_C_string();
2348 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2349 strcpy(*source_name_ptr, sfncp);
2350 }
2351
2352 return JVMTI_ERROR_NONE;
2353 } /* end GetSourceFileName */
2354
2355
2356 // k_mirror - may be primitive, this must be checked
2357 // modifiers_ptr - pre-checked for NULL
2358 jvmtiError
2359 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2360 JavaThread* current_thread = JavaThread::current();
2361 jint result = 0;
2362 if (!java_lang_Class::is_primitive(k_mirror)) {
2363 Klass* k = java_lang_Class::as_Klass(k_mirror);
2364 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2365 result = k->compute_modifier_flags(current_thread);
2366 JavaThread* THREAD = current_thread; // pass to macros
2367 if (HAS_PENDING_EXCEPTION) {
2368 CLEAR_PENDING_EXCEPTION;
2369 return JVMTI_ERROR_INTERNAL;
2370 };
2371
2372 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2373 if(k->is_super()) {
2374 result |= JVM_ACC_SUPER;
2375 }
2376 } else {
2377 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2378 }
2379 *modifiers_ptr = result;
2380
2381 return JVMTI_ERROR_NONE;
2382 } /* end GetClassModifiers */
2383
2384
2385 // k_mirror - may be primitive, this must be checked
2386 // method_count_ptr - pre-checked for NULL
2387 // methods_ptr - pre-checked for NULL
2388 jvmtiError
2389 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2390 JavaThread* current_thread = JavaThread::current();
2391 HandleMark hm(current_thread);
2392
2393 if (java_lang_Class::is_primitive(k_mirror)) {
2394 *method_count_ptr = 0;
2395 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2396 return JVMTI_ERROR_NONE;
2397 }
2398 Klass* k = java_lang_Class::as_Klass(k_mirror);
2399 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2400
2401 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2402 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2403 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2404 }
2405
2406 if (!k->is_instance_klass()) {
2407 *method_count_ptr = 0;
2408 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2409 return JVMTI_ERROR_NONE;
2410 }
2411 instanceKlassHandle instanceK_h(current_thread, k);
2412 // Allocate the result and fill it in
2413 int result_length = instanceK_h->methods()->length();
2414 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2415 int index;
2416 bool jmethodids_found = true;
2417
2418 if (JvmtiExport::can_maintain_original_method_order()) {
2419 // Use the original method ordering indices stored in the class, so we can emit
2420 // jmethodIDs in the order they appeared in the class file
2421 for (index = 0; index < result_length; index++) {
2422 Method* m = instanceK_h->methods()->at(index);
2423 int original_index = instanceK_h->method_ordering()->at(index);
2424 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2425 jmethodID id;
2426 if (jmethodids_found) {
2427 id = m->find_jmethod_id_or_null();
2428 if (id == NULL) {
2429 // If we find an uninitialized value, make sure there is
2430 // enough space for all the uninitialized values we might
2431 // find.
2432 instanceK_h->ensure_space_for_methodids(index);
2433 jmethodids_found = false;
2434 id = m->jmethod_id();
2435 }
2436 } else {
2437 id = m->jmethod_id();
2438 }
2439 result_list[original_index] = id;
2440 }
2441 } else {
2442 // otherwise just copy in any order
2443 for (index = 0; index < result_length; index++) {
2444 Method* m = instanceK_h->methods()->at(index);
2445 jmethodID id;
2446 if (jmethodids_found) {
2447 id = m->find_jmethod_id_or_null();
2448 if (id == NULL) {
2449 // If we find an uninitialized value, make sure there is
2450 // enough space for all the uninitialized values we might
2451 // find.
2452 instanceK_h->ensure_space_for_methodids(index);
2453 jmethodids_found = false;
2454 id = m->jmethod_id();
2455 }
2456 } else {
2457 id = m->jmethod_id();
2458 }
2459 result_list[index] = id;
2460 }
2461 }
2462 // Fill in return value.
2463 *method_count_ptr = result_length;
2464 *methods_ptr = result_list;
2465
2466 return JVMTI_ERROR_NONE;
2467 } /* end GetClassMethods */
2468
2469
2470 // k_mirror - may be primitive, this must be checked
2471 // field_count_ptr - pre-checked for NULL
2472 // fields_ptr - pre-checked for NULL
2473 jvmtiError
2474 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2475 if (java_lang_Class::is_primitive(k_mirror)) {
2476 *field_count_ptr = 0;
2477 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2478 return JVMTI_ERROR_NONE;
2479 }
2480 JavaThread* current_thread = JavaThread::current();
2481 HandleMark hm(current_thread);
2482 Klass* k = java_lang_Class::as_Klass(k_mirror);
2483 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2484
2485 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2486 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2487 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2488 }
2489
2490 if (!k->is_instance_klass()) {
2491 *field_count_ptr = 0;
2492 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2493 return JVMTI_ERROR_NONE;
2494 }
2495
2496
2497 instanceKlassHandle instanceK_h(current_thread, k);
2498
2499 int result_count = 0;
2500 // First, count the fields.
2501 FilteredFieldStream flds(instanceK_h, true, true);
2502 result_count = flds.field_count();
2503
2504 // Allocate the result and fill it in
2505 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2506 // The JVMTI spec requires fields in the order they occur in the class file,
2507 // this is the reverse order of what FieldStream hands out.
2508 int id_index = (result_count - 1);
2509
2510 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2511 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2512 instanceK_h, src_st.offset(),
2513 src_st.access_flags().is_static());
2514 }
2515 assert(id_index == -1, "just checking");
2516 // Fill in the results
2517 *field_count_ptr = result_count;
2518 *fields_ptr = result_list;
2519
2520 return JVMTI_ERROR_NONE;
2521 } /* end GetClassFields */
2522
2523
2524 // k_mirror - may be primitive, this must be checked
2525 // interface_count_ptr - pre-checked for NULL
2526 // interfaces_ptr - pre-checked for NULL
2527 jvmtiError
2528 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2529 {
2530 if (java_lang_Class::is_primitive(k_mirror)) {
2531 *interface_count_ptr = 0;
2532 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2533 return JVMTI_ERROR_NONE;
2534 }
2535 JavaThread* current_thread = JavaThread::current();
2536 HandleMark hm(current_thread);
2537 Klass* k = java_lang_Class::as_Klass(k_mirror);
2538 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2539
2540 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2541 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2542 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2543
2544 if (!k->is_instance_klass()) {
2545 *interface_count_ptr = 0;
2546 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2547 return JVMTI_ERROR_NONE;
2548 }
2549
2550 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2551 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2552 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2553 for (int i_index = 0; i_index < result_length; i_index += 1) {
2554 Klass* klass_at = interface_list->at(i_index);
2555 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2556 assert(klass_at->is_interface(), "interfaces must be interfaces");
2557 oop mirror_at = klass_at->java_mirror();
2558 Handle handle_at = Handle(current_thread, mirror_at);
2559 result_list[i_index] = (jclass) jni_reference(handle_at);
2560 }
2561 *interface_count_ptr = result_length;
2562 *interfaces_ptr = result_list;
2563 }
2564
2565 return JVMTI_ERROR_NONE;
2566 } /* end GetImplementedInterfaces */
2567
2568
2569 // k_mirror - may be primitive, this must be checked
2570 // minor_version_ptr - pre-checked for NULL
2571 // major_version_ptr - pre-checked for NULL
2572 jvmtiError
2573 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2574 if (java_lang_Class::is_primitive(k_mirror)) {
2575 return JVMTI_ERROR_ABSENT_INFORMATION;
2576 }
2577 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2578 Thread *thread = Thread::current();
2579 HandleMark hm(thread);
2580 KlassHandle klass(thread, k_oop);
2581
2582 jint status = klass->jvmti_class_status();
2583 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2584 return JVMTI_ERROR_INVALID_CLASS;
2585 }
2586 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2587 return JVMTI_ERROR_ABSENT_INFORMATION;
2588 }
2589
2590 instanceKlassHandle ik(thread, k_oop);
2591 *minor_version_ptr = ik->minor_version();
2592 *major_version_ptr = ik->major_version();
2593
2594 return JVMTI_ERROR_NONE;
2595 } /* end GetClassVersionNumbers */
2596
2597
2598 // k_mirror - may be primitive, this must be checked
2599 // constant_pool_count_ptr - pre-checked for NULL
2600 // constant_pool_byte_count_ptr - pre-checked for NULL
2601 // constant_pool_bytes_ptr - pre-checked for NULL
2602 jvmtiError
2603 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2604 if (java_lang_Class::is_primitive(k_mirror)) {
2605 return JVMTI_ERROR_ABSENT_INFORMATION;
2606 }
2607
2608 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2609 Thread *thread = Thread::current();
2610 HandleMark hm(thread);
2611 ResourceMark rm(thread);
2612 KlassHandle klass(thread, k_oop);
2613
2614 jint status = klass->jvmti_class_status();
2615 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2616 return JVMTI_ERROR_INVALID_CLASS;
2617 }
2618 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2619 return JVMTI_ERROR_ABSENT_INFORMATION;
2620 }
2621
2622 instanceKlassHandle ikh(thread, k_oop);
2623 JvmtiConstantPoolReconstituter reconstituter(ikh);
2624 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2625 return reconstituter.get_error();
2626 }
2627
2628 unsigned char *cpool_bytes;
2629 int cpool_size = reconstituter.cpool_size();
2630 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2631 return reconstituter.get_error();
2632 }
2633 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2634 if (res != JVMTI_ERROR_NONE) {
2635 return res;
2636 }
2637 reconstituter.copy_cpool_bytes(cpool_bytes);
2638 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2639 return reconstituter.get_error();
2640 }
2641
2642 constantPoolHandle constants(thread, ikh->constants());
2643 *constant_pool_count_ptr = constants->length();
2644 *constant_pool_byte_count_ptr = cpool_size;
2645 *constant_pool_bytes_ptr = cpool_bytes;
2646
2647 return JVMTI_ERROR_NONE;
2648 } /* end GetConstantPool */
2649
2650
2651 // k_mirror - may be primitive, this must be checked
2652 // is_interface_ptr - pre-checked for NULL
2653 jvmtiError
2654 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2655 {
2656 bool result = false;
2657 if (!java_lang_Class::is_primitive(k_mirror)) {
2658 Klass* k = java_lang_Class::as_Klass(k_mirror);
2659 if (k != NULL && k->is_interface()) {
2660 result = true;
2661 }
2662 }
2663 *is_interface_ptr = result;
2664 }
2665
2666 return JVMTI_ERROR_NONE;
2667 } /* end IsInterface */
2668
2669
2670 // k_mirror - may be primitive, this must be checked
2671 // is_array_class_ptr - pre-checked for NULL
2672 jvmtiError
2673 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2674 {
2675 bool result = false;
2676 if (!java_lang_Class::is_primitive(k_mirror)) {
2677 Klass* k = java_lang_Class::as_Klass(k_mirror);
2678 if (k != NULL && k->is_array_klass()) {
2679 result = true;
2680 }
2681 }
2682 *is_array_class_ptr = result;
2683 }
2684
2685 return JVMTI_ERROR_NONE;
2686 } /* end IsArrayClass */
2687
2688
2689 // k_mirror - may be primitive, this must be checked
2690 // classloader_ptr - pre-checked for NULL
2691 jvmtiError
2692 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2693 {
2694 if (java_lang_Class::is_primitive(k_mirror)) {
2695 *classloader_ptr = (jclass) jni_reference(Handle());
2696 return JVMTI_ERROR_NONE;
2697 }
2698 JavaThread* current_thread = JavaThread::current();
2699 HandleMark hm(current_thread);
2700 Klass* k = java_lang_Class::as_Klass(k_mirror);
2701 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2702
2703 oop result_oop = k->class_loader();
2704 if (result_oop == NULL) {
2705 *classloader_ptr = (jclass) jni_reference(Handle());
2706 return JVMTI_ERROR_NONE;
2707 }
2708 Handle result_handle = Handle(current_thread, result_oop);
2709 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2710 *classloader_ptr = result_jnihandle;
2711 }
2712 return JVMTI_ERROR_NONE;
2713 } /* end GetClassLoader */
2714
2715
2716 // k_mirror - may be primitive, this must be checked
2717 // source_debug_extension_ptr - pre-checked for NULL
2718 jvmtiError
2719 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2720 {
2721 if (java_lang_Class::is_primitive(k_mirror)) {
2722 return JVMTI_ERROR_ABSENT_INFORMATION;
2723 }
2724 Klass* k = java_lang_Class::as_Klass(k_mirror);
2725 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2726 if (!k->is_instance_klass()) {
2727 return JVMTI_ERROR_ABSENT_INFORMATION;
2728 }
2729 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2730 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2731
2732 {
2733 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2734 strcpy(*source_debug_extension_ptr, sde);
2735 }
2736 }
2737
2738 return JVMTI_ERROR_NONE;
2739 } /* end GetSourceDebugExtension */
2740
2741 //
2742 // Object functions
2743 //
2744
2745 // hash_code_ptr - pre-checked for NULL
2746 jvmtiError
2747 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2748 oop mirror = JNIHandles::resolve_external_guard(object);
2749 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2750 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2751
2752 {
2753 jint result = (jint) mirror->identity_hash();
2754 *hash_code_ptr = result;
2755 }
2756 return JVMTI_ERROR_NONE;
2757 } /* end GetObjectHashCode */
2758
2759
2760 // info_ptr - pre-checked for NULL
2761 jvmtiError
2762 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2763 JavaThread* calling_thread = JavaThread::current();
2764 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2765 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2766 // Some of the critical threads were not suspended. go to a safepoint and try again
2767 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2768 VMThread::execute(&op);
2769 err = op.result();
2770 }
2771 return err;
2772 } /* end GetObjectMonitorUsage */
2773
2774
2775 //
2776 // Field functions
2777 //
2778
2779 // name_ptr - NULL is a valid value, must be checked
2780 // signature_ptr - NULL is a valid value, must be checked
2781 // generic_ptr - NULL is a valid value, must be checked
2782 jvmtiError
2783 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2784 JavaThread* current_thread = JavaThread::current();
2785 ResourceMark rm(current_thread);
2786 if (name_ptr == NULL) {
2787 // just don't return the name
2788 } else {
2789 const char* fieldName = fdesc_ptr->name()->as_C_string();
2790 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2791 if (*name_ptr == NULL)
2792 return JVMTI_ERROR_OUT_OF_MEMORY;
2793 strcpy(*name_ptr, fieldName);
2794 }
2795 if (signature_ptr== NULL) {
2796 // just don't return the signature
2797 } else {
2798 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2799 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2800 if (*signature_ptr == NULL)
2801 return JVMTI_ERROR_OUT_OF_MEMORY;
2802 strcpy(*signature_ptr, fieldSignature);
2803 }
2804 if (generic_ptr != NULL) {
2805 *generic_ptr = NULL;
2806 Symbol* soop = fdesc_ptr->generic_signature();
2807 if (soop != NULL) {
2808 const char* gen_sig = soop->as_C_string();
2809 if (gen_sig != NULL) {
2810 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2811 if (err != JVMTI_ERROR_NONE) {
2812 return err;
2813 }
2814 strcpy(*generic_ptr, gen_sig);
2815 }
2816 }
2817 }
2818 return JVMTI_ERROR_NONE;
2819 } /* end GetFieldName */
2820
2821
2822 // declaring_class_ptr - pre-checked for NULL
2823 jvmtiError
2824 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2825
2826 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2827 return JVMTI_ERROR_NONE;
2828 } /* end GetFieldDeclaringClass */
2829
2830
2831 // modifiers_ptr - pre-checked for NULL
2832 jvmtiError
2833 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2834
2835 AccessFlags resultFlags = fdesc_ptr->access_flags();
2836 jint result = resultFlags.as_int();
2837 *modifiers_ptr = result;
2838
2839 return JVMTI_ERROR_NONE;
2840 } /* end GetFieldModifiers */
2841
2842
2843 // is_synthetic_ptr - pre-checked for NULL
2844 jvmtiError
2845 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2846 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2847 return JVMTI_ERROR_NONE;
2848 } /* end IsFieldSynthetic */
2849
2850
2851 //
2852 // Method functions
2853 //
2854
2855 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2856 // name_ptr - NULL is a valid value, must be checked
2857 // signature_ptr - NULL is a valid value, must be checked
2858 // generic_ptr - NULL is a valid value, must be checked
2859 jvmtiError
2860 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2861 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2862 JavaThread* current_thread = JavaThread::current();
2863
2864 ResourceMark rm(current_thread); // get the utf8 name and signature
2865 if (name_ptr == NULL) {
2866 // just don't return the name
2867 } else {
2868 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2869 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2870 strcpy(*name_ptr, utf8_name);
2871 }
2872 if (signature_ptr == NULL) {
2873 // just don't return the signature
2874 } else {
2875 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2876 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2877 strcpy(*signature_ptr, utf8_signature);
2878 }
2879
2880 if (generic_ptr != NULL) {
2881 *generic_ptr = NULL;
2882 Symbol* soop = method_oop->generic_signature();
2883 if (soop != NULL) {
2884 const char* gen_sig = soop->as_C_string();
2885 if (gen_sig != NULL) {
2886 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2887 if (err != JVMTI_ERROR_NONE) {
2888 return err;
2889 }
2890 strcpy(*generic_ptr, gen_sig);
2891 }
2892 }
2893 }
2894 return JVMTI_ERROR_NONE;
2895 } /* end GetMethodName */
2896
2897
2898 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2899 // declaring_class_ptr - pre-checked for NULL
2900 jvmtiError
2901 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2902 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2903 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2904 return JVMTI_ERROR_NONE;
2905 } /* end GetMethodDeclaringClass */
2906
2907
2908 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2909 // modifiers_ptr - pre-checked for NULL
2910 jvmtiError
2911 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2912 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2913 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2914 return JVMTI_ERROR_NONE;
2915 } /* end GetMethodModifiers */
2916
2917
2918 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2919 // max_ptr - pre-checked for NULL
2920 jvmtiError
2921 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2922 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2923 // get max stack
2924 (*max_ptr) = method_oop->max_locals();
2925 return JVMTI_ERROR_NONE;
2926 } /* end GetMaxLocals */
2927
2928
2929 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2930 // size_ptr - pre-checked for NULL
2931 jvmtiError
2932 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2933 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2934 // get size of arguments
2935
2936 (*size_ptr) = method_oop->size_of_parameters();
2937 return JVMTI_ERROR_NONE;
2938 } /* end GetArgumentsSize */
2939
2940
2941 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2942 // entry_count_ptr - pre-checked for NULL
2943 // table_ptr - pre-checked for NULL
2944 jvmtiError
2945 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2946 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2947 if (!method_oop->has_linenumber_table()) {
2948 return (JVMTI_ERROR_ABSENT_INFORMATION);
2949 }
2950
2951 // The line number table is compressed so we don't know how big it is until decompressed.
2952 // Decompression is really fast so we just do it twice.
2953
2954 // Compute size of table
2955 jint num_entries = 0;
2956 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2957 while (stream.read_pair()) {
2958 num_entries++;
2959 }
2960 jvmtiLineNumberEntry *jvmti_table =
2961 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2962
2963 // Fill jvmti table
2964 if (num_entries > 0) {
2965 int index = 0;
2966 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2967 while (stream.read_pair()) {
2968 jvmti_table[index].start_location = (jlocation) stream.bci();
2969 jvmti_table[index].line_number = (jint) stream.line();
2970 index++;
2971 }
2972 assert(index == num_entries, "sanity check");
2973 }
2974
2975 // Set up results
2976 (*entry_count_ptr) = num_entries;
2977 (*table_ptr) = jvmti_table;
2978
2979 return JVMTI_ERROR_NONE;
2980 } /* end GetLineNumberTable */
2981
2982
2983 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2984 // start_location_ptr - pre-checked for NULL
2985 // end_location_ptr - pre-checked for NULL
2986 jvmtiError
2987 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2988
2989 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2990 // get start and end location
2991 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2992 if (method_oop->code_size() == 0) {
2993 // there is no code so there is no start location
2994 (*start_location_ptr) = (jlocation)(-1);
2995 } else {
2996 (*start_location_ptr) = (jlocation)(0);
2997 }
2998
2999 return JVMTI_ERROR_NONE;
3000 } /* end GetMethodLocation */
3001
3002
3003 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3004 // entry_count_ptr - pre-checked for NULL
3005 // table_ptr - pre-checked for NULL
3006 jvmtiError
3007 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3008
3009 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3010 JavaThread* current_thread = JavaThread::current();
3011
3012 // does the klass have any local variable information?
3013 InstanceKlass* ik = method_oop->method_holder();
3014 if (!ik->access_flags().has_localvariable_table()) {
3015 return (JVMTI_ERROR_ABSENT_INFORMATION);
3016 }
3017
3018 ConstantPool* constants = method_oop->constants();
3019 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3020
3021 // in the vm localvariable table representation, 6 consecutive elements in the table
3022 // represent a 6-tuple of shorts
3023 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3024 jint num_entries = method_oop->localvariable_table_length();
3025 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3026 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3027
3028 if (num_entries > 0) {
3029 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3030 for (int i = 0; i < num_entries; i++) {
3031 // get the 5 tuple information from the vm table
3032 jlocation start_location = (jlocation) table[i].start_bci;
3033 jint length = (jint) table[i].length;
3034 int name_index = (int) table[i].name_cp_index;
3035 int signature_index = (int) table[i].descriptor_cp_index;
3036 int generic_signature_index = (int) table[i].signature_cp_index;
3037 jint slot = (jint) table[i].slot;
3038
3039 // get utf8 name and signature
3040 char *name_buf = NULL;
3041 char *sig_buf = NULL;
3042 char *gen_sig_buf = NULL;
3043 {
3044 ResourceMark rm(current_thread);
3045
3046 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3047 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3048 strcpy(name_buf, utf8_name);
3049
3050 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3051 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3052 strcpy(sig_buf, utf8_signature);
3053
3054 if (generic_signature_index > 0) {
3055 const char *utf8_gen_sign = (const char *)
3056 constants->symbol_at(generic_signature_index)->as_utf8();
3057 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3058 strcpy(gen_sig_buf, utf8_gen_sign);
3059 }
3060 }
3061
3062 // fill in the jvmti local variable table
3063 jvmti_table[i].start_location = start_location;
3064 jvmti_table[i].length = length;
3065 jvmti_table[i].name = name_buf;
3066 jvmti_table[i].signature = sig_buf;
3067 jvmti_table[i].generic_signature = gen_sig_buf;
3068 jvmti_table[i].slot = slot;
3069 }
3070 }
3071
3072 // set results
3073 (*entry_count_ptr) = num_entries;
3074 (*table_ptr) = jvmti_table;
3075
3076 return JVMTI_ERROR_NONE;
3077 } /* end GetLocalVariableTable */
3078
3079
3080 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3081 // bytecode_count_ptr - pre-checked for NULL
3082 // bytecodes_ptr - pre-checked for NULL
3083 jvmtiError
3084 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3085 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3086
3087 HandleMark hm;
3088 methodHandle method(method_oop);
3089 jint size = (jint)method->code_size();
3090 jvmtiError err = allocate(size, bytecodes_ptr);
3091 if (err != JVMTI_ERROR_NONE) {
3092 return err;
3093 }
3094
3095 (*bytecode_count_ptr) = size;
3096 // get byte codes
3097 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3098
3099 return JVMTI_ERROR_NONE;
3100 } /* end GetBytecodes */
3101
3102
3103 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3104 // is_native_ptr - pre-checked for NULL
3105 jvmtiError
3106 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3107 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3108 (*is_native_ptr) = method_oop->is_native();
3109 return JVMTI_ERROR_NONE;
3110 } /* end IsMethodNative */
3111
3112
3113 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3114 // is_synthetic_ptr - pre-checked for NULL
3115 jvmtiError
3116 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3117 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3118 (*is_synthetic_ptr) = method_oop->is_synthetic();
3119 return JVMTI_ERROR_NONE;
3120 } /* end IsMethodSynthetic */
3121
3122
3123 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3124 // is_obsolete_ptr - pre-checked for NULL
3125 jvmtiError
3126 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3127 if (use_version_1_0_semantics() &&
3128 get_capabilities()->can_redefine_classes == 0) {
3129 // This JvmtiEnv requested version 1.0 semantics and this function
3130 // requires the can_redefine_classes capability in version 1.0 so
3131 // we need to return an error here.
3132 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3133 }
3134
3135 if (method_oop == NULL || method_oop->is_obsolete()) {
3136 *is_obsolete_ptr = true;
3137 } else {
3138 *is_obsolete_ptr = false;
3139 }
3140 return JVMTI_ERROR_NONE;
3141 } /* end IsMethodObsolete */
3142
3143 //
3144 // Raw Monitor functions
3145 //
3146
3147 // name - pre-checked for NULL
3148 // monitor_ptr - pre-checked for NULL
3149 jvmtiError
3150 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3151 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3152 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3153
3154 *monitor_ptr = (jrawMonitorID)rmonitor;
3155
3156 return JVMTI_ERROR_NONE;
3157 } /* end CreateRawMonitor */
3158
3159
3160 // rmonitor - pre-checked for validity
3161 jvmtiError
3162 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3163 if (Threads::number_of_threads() == 0) {
3164 // Remove this monitor from pending raw monitors list
3165 // if it has entered in onload or start phase.
3166 JvmtiPendingMonitors::destroy(rmonitor);
3167 } else {
3168 Thread* thread = Thread::current();
3169 if (rmonitor->is_entered(thread)) {
3170 // The caller owns this monitor which we are about to destroy.
3171 // We exit the underlying synchronization object so that the
3172 // "delete monitor" call below can work without an assertion
3173 // failure on systems that don't like destroying synchronization
3174 // objects that are locked.
3175 int r;
3176 intptr_t recursion = rmonitor->recursions();
3177 for (intptr_t i=0; i <= recursion; i++) {
3178 r = rmonitor->raw_exit(thread);
3179 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3180 if (r != ObjectMonitor::OM_OK) { // robustness
3181 return JVMTI_ERROR_INTERNAL;
3182 }
3183 }
3184 }
3185 if (rmonitor->owner() != NULL) {
3186 // The caller is trying to destroy a monitor that is locked by
3187 // someone else. While this is not forbidden by the JVMTI
3188 // spec, it will cause an assertion failure on systems that don't
3189 // like destroying synchronization objects that are locked.
3190 // We indicate a problem with the error return (and leak the
3191 // monitor's memory).
3192 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3193 }
3194 }
3195
3196 delete rmonitor;
3197
3198 return JVMTI_ERROR_NONE;
3199 } /* end DestroyRawMonitor */
3200
3201
3202 // rmonitor - pre-checked for validity
3203 jvmtiError
3204 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3205 if (Threads::number_of_threads() == 0) {
3206 // No JavaThreads exist so ObjectMonitor enter cannot be
3207 // used, add this raw monitor to the pending list.
3208 // The pending monitors will be actually entered when
3209 // the VM is setup.
3210 // See transition_pending_raw_monitors in create_vm()
3211 // in thread.cpp.
3212 JvmtiPendingMonitors::enter(rmonitor);
3213 } else {
3214 int r = 0;
3215 Thread* thread = Thread::current();
3216
3217 if (thread->is_Java_thread()) {
3218 JavaThread* current_thread = (JavaThread*)thread;
3219
3220 #ifdef PROPER_TRANSITIONS
3221 // Not really unknown but ThreadInVMfromNative does more than we want
3222 ThreadInVMfromUnknown __tiv;
3223 {
3224 ThreadBlockInVM __tbivm(current_thread);
3225 r = rmonitor->raw_enter(current_thread);
3226 }
3227 #else
3228 /* Transition to thread_blocked without entering vm state */
3229 /* This is really evil. Normally you can't undo _thread_blocked */
3230 /* transitions like this because it would cause us to miss a */
3231 /* safepoint but since the thread was already in _thread_in_native */
3232 /* the thread is not leaving a safepoint safe state and it will */
3233 /* block when it tries to return from native. We can't safepoint */
3234 /* block in here because we could deadlock the vmthread. Blech. */
3235
3236 JavaThreadState state = current_thread->thread_state();
3237 assert(state == _thread_in_native, "Must be _thread_in_native");
3238 // frame should already be walkable since we are in native
3239 assert(!current_thread->has_last_Java_frame() ||
3240 current_thread->frame_anchor()->walkable(), "Must be walkable");
3241 current_thread->set_thread_state(_thread_blocked);
3242
3243 r = rmonitor->raw_enter(current_thread);
3244 // restore state, still at a safepoint safe state
3245 current_thread->set_thread_state(state);
3246
3247 #endif /* PROPER_TRANSITIONS */
3248 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3249 } else {
3250 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3251 r = rmonitor->raw_enter(thread);
3252 } else {
3253 ShouldNotReachHere();
3254 }
3255 }
3256
3257 if (r != ObjectMonitor::OM_OK) { // robustness
3258 return JVMTI_ERROR_INTERNAL;
3259 }
3260 }
3261 return JVMTI_ERROR_NONE;
3262 } /* end RawMonitorEnter */
3263
3264
3265 // rmonitor - pre-checked for validity
3266 jvmtiError
3267 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3268 jvmtiError err = JVMTI_ERROR_NONE;
3269
3270 if (Threads::number_of_threads() == 0) {
3271 // No JavaThreads exist so just remove this monitor from the pending list.
3272 // Bool value from exit is false if rmonitor is not in the list.
3273 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3274 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3275 }
3276 } else {
3277 int r = 0;
3278 Thread* thread = Thread::current();
3279
3280 if (thread->is_Java_thread()) {
3281 JavaThread* current_thread = (JavaThread*)thread;
3282 #ifdef PROPER_TRANSITIONS
3283 // Not really unknown but ThreadInVMfromNative does more than we want
3284 ThreadInVMfromUnknown __tiv;
3285 #endif /* PROPER_TRANSITIONS */
3286 r = rmonitor->raw_exit(current_thread);
3287 } else {
3288 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3289 r = rmonitor->raw_exit(thread);
3290 } else {
3291 ShouldNotReachHere();
3292 }
3293 }
3294
3295 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3296 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3297 } else {
3298 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3299 if (r != ObjectMonitor::OM_OK) { // robustness
3300 err = JVMTI_ERROR_INTERNAL;
3301 }
3302 }
3303 }
3304 return err;
3305 } /* end RawMonitorExit */
3306
3307
3308 // rmonitor - pre-checked for validity
3309 jvmtiError
3310 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3311 int r = 0;
3312 Thread* thread = Thread::current();
3313
3314 if (thread->is_Java_thread()) {
3315 JavaThread* current_thread = (JavaThread*)thread;
3316 #ifdef PROPER_TRANSITIONS
3317 // Not really unknown but ThreadInVMfromNative does more than we want
3318 ThreadInVMfromUnknown __tiv;
3319 {
3320 ThreadBlockInVM __tbivm(current_thread);
3321 r = rmonitor->raw_wait(millis, true, current_thread);
3322 }
3323 #else
3324 /* Transition to thread_blocked without entering vm state */
3325 /* This is really evil. Normally you can't undo _thread_blocked */
3326 /* transitions like this because it would cause us to miss a */
3327 /* safepoint but since the thread was already in _thread_in_native */
3328 /* the thread is not leaving a safepoint safe state and it will */
3329 /* block when it tries to return from native. We can't safepoint */
3330 /* block in here because we could deadlock the vmthread. Blech. */
3331
3332 JavaThreadState state = current_thread->thread_state();
3333 assert(state == _thread_in_native, "Must be _thread_in_native");
3334 // frame should already be walkable since we are in native
3335 assert(!current_thread->has_last_Java_frame() ||
3336 current_thread->frame_anchor()->walkable(), "Must be walkable");
3337 current_thread->set_thread_state(_thread_blocked);
3338
3339 r = rmonitor->raw_wait(millis, true, current_thread);
3340 // restore state, still at a safepoint safe state
3341 current_thread->set_thread_state(state);
3342
3343 #endif /* PROPER_TRANSITIONS */
3344 } else {
3345 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3346 r = rmonitor->raw_wait(millis, true, thread);
3347 } else {
3348 ShouldNotReachHere();
3349 }
3350 }
3351
3352 switch (r) {
3353 case ObjectMonitor::OM_INTERRUPTED:
3354 return JVMTI_ERROR_INTERRUPT;
3355 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3356 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3357 }
3358 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3359 if (r != ObjectMonitor::OM_OK) { // robustness
3360 return JVMTI_ERROR_INTERNAL;
3361 }
3362
3363 return JVMTI_ERROR_NONE;
3364 } /* end RawMonitorWait */
3365
3366
3367 // rmonitor - pre-checked for validity
3368 jvmtiError
3369 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3370 int r = 0;
3371 Thread* thread = Thread::current();
3372
3373 if (thread->is_Java_thread()) {
3374 JavaThread* current_thread = (JavaThread*)thread;
3375 // Not really unknown but ThreadInVMfromNative does more than we want
3376 ThreadInVMfromUnknown __tiv;
3377 r = rmonitor->raw_notify(current_thread);
3378 } else {
3379 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3380 r = rmonitor->raw_notify(thread);
3381 } else {
3382 ShouldNotReachHere();
3383 }
3384 }
3385
3386 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3387 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3388 }
3389 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3390 if (r != ObjectMonitor::OM_OK) { // robustness
3391 return JVMTI_ERROR_INTERNAL;
3392 }
3393
3394 return JVMTI_ERROR_NONE;
3395 } /* end RawMonitorNotify */
3396
3397
3398 // rmonitor - pre-checked for validity
3399 jvmtiError
3400 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3401 int r = 0;
3402 Thread* thread = Thread::current();
3403
3404 if (thread->is_Java_thread()) {
3405 JavaThread* current_thread = (JavaThread*)thread;
3406 ThreadInVMfromUnknown __tiv;
3407 r = rmonitor->raw_notifyAll(current_thread);
3408 } else {
3409 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3410 r = rmonitor->raw_notifyAll(thread);
3411 } else {
3412 ShouldNotReachHere();
3413 }
3414 }
3415
3416 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3417 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3418 }
3419 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3420 if (r != ObjectMonitor::OM_OK) { // robustness
3421 return JVMTI_ERROR_INTERNAL;
3422 }
3423
3424 return JVMTI_ERROR_NONE;
3425 } /* end RawMonitorNotifyAll */
3426
3427
3428 //
3429 // JNI Function Interception functions
3430 //
3431
3432
3433 // function_table - pre-checked for NULL
3434 jvmtiError
3435 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3436 // Copy jni function table at safepoint.
3437 VM_JNIFunctionTableCopier copier(function_table);
3438 VMThread::execute(&copier);
3439
3440 return JVMTI_ERROR_NONE;
3441 } /* end SetJNIFunctionTable */
3442
3443
3444 // function_table - pre-checked for NULL
3445 jvmtiError
3446 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3447 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3448 if (*function_table == NULL)
3449 return JVMTI_ERROR_OUT_OF_MEMORY;
3450 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3451 return JVMTI_ERROR_NONE;
3452 } /* end GetJNIFunctionTable */
3453
3454
3455 //
3456 // Event Management functions
3457 //
3458
3459 jvmtiError
3460 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3461 // can only generate two event types
3462 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3463 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3464 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3465 }
3466
3467 // for compiled_method_load events we must check that the environment
3468 // has the can_generate_compiled_method_load_events capability.
3469 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3470 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3471 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3472 }
3473 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3474 } else {
3475 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3476 }
3477
3478 } /* end GenerateEvents */
3479
3480
3481 //
3482 // Extension Mechanism functions
3483 //
3484
3485 // extension_count_ptr - pre-checked for NULL
3486 // extensions - pre-checked for NULL
3487 jvmtiError
3488 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3489 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3490 } /* end GetExtensionFunctions */
3491
3492
3493 // extension_count_ptr - pre-checked for NULL
3494 // extensions - pre-checked for NULL
3495 jvmtiError
3496 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3497 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3498 } /* end GetExtensionEvents */
3499
3500
3501 // callback - NULL is a valid value, must be checked
3502 jvmtiError
3503 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3504 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3505 } /* end SetExtensionEventCallback */
3506
3507 //
3508 // Timers functions
3509 //
3510
3511 // info_ptr - pre-checked for NULL
3512 jvmtiError
3513 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3514 os::current_thread_cpu_time_info(info_ptr);
3515 return JVMTI_ERROR_NONE;
3516 } /* end GetCurrentThreadCpuTimerInfo */
3517
3518
3519 // nanos_ptr - pre-checked for NULL
3520 jvmtiError
3521 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3522 *nanos_ptr = os::current_thread_cpu_time();
3523 return JVMTI_ERROR_NONE;
3524 } /* end GetCurrentThreadCpuTime */
3525
3526
3527 // info_ptr - pre-checked for NULL
3528 jvmtiError
3529 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3530 os::thread_cpu_time_info(info_ptr);
3531 return JVMTI_ERROR_NONE;
3532 } /* end GetThreadCpuTimerInfo */
3533
3534
3535 // Threads_lock NOT held, java_thread not protected by lock
3536 // java_thread - pre-checked
3537 // nanos_ptr - pre-checked for NULL
3538 jvmtiError
3539 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3540 *nanos_ptr = os::thread_cpu_time(java_thread);
3541 return JVMTI_ERROR_NONE;
3542 } /* end GetThreadCpuTime */
3543
3544
3545 // info_ptr - pre-checked for NULL
3546 jvmtiError
3547 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3548 os::javaTimeNanos_info(info_ptr);
3549 return JVMTI_ERROR_NONE;
3550 } /* end GetTimerInfo */
3551
3552
3553 // nanos_ptr - pre-checked for NULL
3554 jvmtiError
3555 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3556 *nanos_ptr = os::javaTimeNanos();
3557 return JVMTI_ERROR_NONE;
3558 } /* end GetTime */
3559
3560
3561 // processor_count_ptr - pre-checked for NULL
3562 jvmtiError
3563 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3564 *processor_count_ptr = os::active_processor_count();
3565 return JVMTI_ERROR_NONE;
3566 } /* end GetAvailableProcessors */
3567
3568 //
3569 // System Properties functions
3570 //
3571
3572 // count_ptr - pre-checked for NULL
3573 // property_ptr - pre-checked for NULL
3574 jvmtiError
3575 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3576 jvmtiError err = JVMTI_ERROR_NONE;
3577
3578 // Get the number of readable properties.
3579 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3580
3581 // Allocate memory to hold the exact number of readable properties.
3582 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3583 if (err != JVMTI_ERROR_NONE) {
3584 return err;
3585 }
3586 int readable_count = 0;
3587 // Loop through the system properties until all the readable properties are found.
3588 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3589 if (p->is_readable()) {
3590 const char *key = p->key();
3591 char **tmp_value = *property_ptr+readable_count;
3592 readable_count++;
3593 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3594 if (err == JVMTI_ERROR_NONE) {
3595 strcpy(*tmp_value, key);
3596 } else {
3597 // clean up previously allocated memory.
3598 for (int j=0; j<readable_count; j++) {
3599 Deallocate((unsigned char*)*property_ptr+j);
3600 }
3601 Deallocate((unsigned char*)property_ptr);
3602 break;
3603 }
3604 }
3605 }
3606 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3607 return err;
3608 } /* end GetSystemProperties */
3609
3610
3611 // property - pre-checked for NULL
3612 // value_ptr - pre-checked for NULL
3613 jvmtiError
3614 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3615 jvmtiError err = JVMTI_ERROR_NONE;
3616 const char *value;
3617
3618 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3619 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3620 if (value == NULL) {
3621 err = JVMTI_ERROR_NOT_AVAILABLE;
3622 } else {
3623 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3624 if (err == JVMTI_ERROR_NONE) {
3625 strcpy(*value_ptr, value);
3626 }
3627 }
3628 return err;
3629 } /* end GetSystemProperty */
3630
3631
3632 // property - pre-checked for NULL
3633 // value - NULL is a valid value, must be checked
3634 jvmtiError
3635 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3636 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3637
3638 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3639 if (strcmp(property, p->key()) == 0) {
3640 if (p->set_writeable_value(value_ptr)) {
3641 err = JVMTI_ERROR_NONE;
3642 }
3643 }
3644 }
3645 return err;
3646 } /* end SetSystemProperty */