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