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