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