rev 52084 : 8211980: Remove ThreadHeapSampler enable/disable/enabled methods
Summary:
Reviewed-by:
1 /*
2 * Copyright (c) 2003, 2018, 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.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/fieldDescriptor.inline.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jfieldIDWorkaround.hpp"
62 #include "runtime/jniHandles.inline.hpp"
63 #include "runtime/objectMonitor.inline.hpp"
64 #include "runtime/osThread.hpp"
65 #include "runtime/reflectionUtils.hpp"
66 #include "runtime/signature.hpp"
67 #include "runtime/thread.inline.hpp"
68 #include "runtime/threadHeapSampler.hpp"
69 #include "runtime/threadSMR.hpp"
70 #include "runtime/timerTrace.hpp"
71 #include "runtime/vframe.inline.hpp"
72 #include "runtime/vmThread.hpp"
73 #include "services/threadService.hpp"
74 #include "utilities/exceptions.hpp"
75 #include "utilities/preserveException.hpp"
76
77
78 #define FIXLATER 0 // REMOVE this when completed.
79
80 // FIXLATER: hook into JvmtiTrace
81 #define TraceJVMTICalls false
82
83 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
84 }
85
86 JvmtiEnv::~JvmtiEnv() {
87 }
88
89 JvmtiEnv*
90 JvmtiEnv::create_a_jvmti(jint version) {
91 return new JvmtiEnv(version);
92 }
93
94 // VM operation class to copy jni function table at safepoint.
95 // More than one java threads or jvmti agents may be reading/
96 // modifying jni function tables. To reduce the risk of bad
97 // interaction b/w these threads it is copied at safepoint.
98 class VM_JNIFunctionTableCopier : public VM_Operation {
99 private:
100 const struct JNINativeInterface_ *_function_table;
101 public:
102 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
103 _function_table = func_tbl;
104 };
105
106 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
107 void doit() {
108 copy_jni_function_table(_function_table);
109 };
110 };
111
112 //
113 // Do not change the "prefix" marker below, everything above it is copied
114 // unchanged into the filled stub, everything below is controlled by the
115 // stub filler (only method bodies are carried forward, and then only for
116 // functionality still in the spec).
117 //
118 // end file prefix
119
120 //
121 // Memory Management functions
122 //
123
124 // mem_ptr - pre-checked for NULL
125 jvmtiError
126 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
127 return allocate(size, mem_ptr);
128 } /* end Allocate */
129
130
131 // mem - NULL is a valid value, must be checked
132 jvmtiError
133 JvmtiEnv::Deallocate(unsigned char* mem) {
134 return deallocate(mem);
135 } /* end Deallocate */
136
137 // Threads_lock NOT held, java_thread not protected by lock
138 // java_thread - pre-checked
139 // data - NULL is a valid value, must be checked
140 jvmtiError
141 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
142 JvmtiThreadState* state = java_thread->jvmti_thread_state();
143 if (state == NULL) {
144 if (data == NULL) {
145 // leaving state unset same as data set to NULL
146 return JVMTI_ERROR_NONE;
147 }
148 // otherwise, create the state
149 state = JvmtiThreadState::state_for(java_thread);
150 if (state == NULL) {
151 return JVMTI_ERROR_THREAD_NOT_ALIVE;
152 }
153 }
154 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
155 return JVMTI_ERROR_NONE;
156 } /* end SetThreadLocalStorage */
157
158
159 // Threads_lock NOT held
160 // thread - NOT pre-checked
161 // data_ptr - pre-checked for NULL
162 jvmtiError
163 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
164 JavaThread* current_thread = JavaThread::current();
165 if (thread == NULL) {
166 JvmtiThreadState* state = current_thread->jvmti_thread_state();
167 *data_ptr = (state == NULL) ? NULL :
168 state->env_thread_state(this)->get_agent_thread_local_storage_data();
169 } else {
170 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
171 // the thread to _thread_in_vm. However, when the TLS for a thread
172 // other than the current thread is required we need to transition
173 // from native so as to resolve the jthread.
174
175 ThreadInVMfromNative __tiv(current_thread);
176 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
177 debug_only(VMNativeEntryWrapper __vew;)
178
179 JavaThread* java_thread = NULL;
180 ThreadsListHandle tlh(current_thread);
181 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
182 if (err != JVMTI_ERROR_NONE) {
183 return err;
184 }
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* klass = java_lang_Class::as_Klass(k_mirror);
420
421 jint status = klass->jvmti_class_status();
422 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
423 return JVMTI_ERROR_INVALID_CLASS;
424 }
425
426 InstanceKlass* ik = InstanceKlass::cast(klass);
427 if (ik->get_cached_class_file_bytes() == NULL) {
428 // Not cached, we need to reconstitute the class file from the
429 // VM representation. We don't attach the reconstituted class
430 // bytes to the InstanceKlass here because they have not been
431 // validated and we're not at a safepoint.
432 JvmtiClassFileReconstituter reconstituter(ik);
433 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
434 return reconstituter.get_error();
435 }
436
437 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
438 class_definitions[index].class_bytes = (unsigned char*)
439 reconstituter.class_file_bytes();
440 } else {
441 // it is cached, get it from the cache
442 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
443 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
444 }
445 class_definitions[index].klass = jcls;
446 }
447 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
448 VMThread::execute(&op);
449 return (op.check_error());
450 } /* end RetransformClasses */
451
452
453 // class_count - pre-checked to be greater than or equal to 0
454 // class_definitions - pre-checked for NULL
455 jvmtiError
456 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
457 //TODO: add locking
458 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
459 VMThread::execute(&op);
460 return (op.check_error());
461 } /* end RedefineClasses */
462
463
464 //
465 // Object functions
466 //
467
468 // size_ptr - pre-checked for NULL
469 jvmtiError
470 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
471 oop mirror = JNIHandles::resolve_external_guard(object);
472 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
473 *size_ptr = (jlong)Universe::heap()->obj_size(mirror) * wordSize;
474 return JVMTI_ERROR_NONE;
475 } /* end GetObjectSize */
476
477 //
478 // Method functions
479 //
480
481 // prefix - NULL is a valid value, must be checked
482 jvmtiError
483 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
484 return prefix == NULL?
485 SetNativeMethodPrefixes(0, NULL) :
486 SetNativeMethodPrefixes(1, (char**)&prefix);
487 } /* end SetNativeMethodPrefix */
488
489
490 // prefix_count - pre-checked to be greater than or equal to 0
491 // prefixes - pre-checked for NULL
492 jvmtiError
493 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
494 // Have to grab JVMTI thread state lock to be sure that some thread
495 // isn't accessing the prefixes at the same time we are setting them.
496 // No locks during VM bring-up.
497 if (Threads::number_of_threads() == 0) {
498 return set_native_method_prefixes(prefix_count, prefixes);
499 } else {
500 MutexLocker mu(JvmtiThreadState_lock);
501 return set_native_method_prefixes(prefix_count, prefixes);
502 }
503 } /* end SetNativeMethodPrefixes */
504
505 //
506 // Event Management functions
507 //
508
509 // callbacks - NULL is a valid value, must be checked
510 // size_of_callbacks - pre-checked to be greater than or equal to 0
511 jvmtiError
512 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
513 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
514 return JVMTI_ERROR_NONE;
515 } /* end SetEventCallbacks */
516
517
518 // event_thread - NULL is a valid value, must be checked
519 jvmtiError
520 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
521 if (event_thread == NULL) {
522 // Can be called at Agent_OnLoad() time with event_thread == NULL
523 // when Thread::current() does not work yet so we cannot create a
524 // ThreadsListHandle that is common to both thread-specific and
525 // global code paths.
526
527 // event_type must be valid
528 if (!JvmtiEventController::is_valid_event_type(event_type)) {
529 return JVMTI_ERROR_INVALID_EVENT_TYPE;
530 }
531
532 bool enabled = (mode == JVMTI_ENABLE);
533
534 // assure that needed capabilities are present
535 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
536 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
537 }
538
539 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
540 record_class_file_load_hook_enabled();
541 }
542
543 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
544 } else {
545 // We have a specified event_thread.
546 JavaThread* java_thread = NULL;
547 ThreadsListHandle tlh;
548 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
549 if (err != JVMTI_ERROR_NONE) {
550 return err;
551 }
552
553 // event_type must be valid
554 if (!JvmtiEventController::is_valid_event_type(event_type)) {
555 return JVMTI_ERROR_INVALID_EVENT_TYPE;
556 }
557
558 // global events cannot be controlled at thread level.
559 if (JvmtiEventController::is_global_event(event_type)) {
560 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
561 }
562
563 bool enabled = (mode == JVMTI_ENABLE);
564
565 // assure that needed capabilities are present
566 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
567 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
568 }
569
570 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
571 record_class_file_load_hook_enabled();
572 }
573 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
574 }
575
576 return JVMTI_ERROR_NONE;
577 } /* end SetEventNotificationMode */
578
579 //
580 // Capability functions
581 //
582
583 // capabilities_ptr - pre-checked for NULL
584 jvmtiError
585 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
586 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
587 get_prohibited_capabilities(),
588 capabilities_ptr);
589 return JVMTI_ERROR_NONE;
590 } /* end GetPotentialCapabilities */
591
592
593 // capabilities_ptr - pre-checked for NULL
594 jvmtiError
595 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
596 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
597 get_prohibited_capabilities(),
598 capabilities_ptr,
599 get_capabilities());
600 } /* end AddCapabilities */
601
602
603 // capabilities_ptr - pre-checked for NULL
604 jvmtiError
605 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
606 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
607 return JVMTI_ERROR_NONE;
608 } /* end RelinquishCapabilities */
609
610
611 // capabilities_ptr - pre-checked for NULL
612 jvmtiError
613 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
614 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
615 return JVMTI_ERROR_NONE;
616 } /* end GetCapabilities */
617
618 //
619 // Class Loader Search functions
620 //
621
622 // segment - pre-checked for NULL
623 jvmtiError
624 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
625 jvmtiPhase phase = get_phase();
626 if (phase == JVMTI_PHASE_ONLOAD) {
627 Arguments::append_sysclasspath(segment);
628 return JVMTI_ERROR_NONE;
629 } else if (use_version_1_0_semantics()) {
630 // This JvmtiEnv requested version 1.0 semantics and this function
631 // is only allowed in the ONLOAD phase in version 1.0 so we need to
632 // return an error here.
633 return JVMTI_ERROR_WRONG_PHASE;
634 } else if (phase == JVMTI_PHASE_LIVE) {
635 // The phase is checked by the wrapper that called this function,
636 // but this thread could be racing with the thread that is
637 // terminating the VM so we check one more time.
638
639 // create the zip entry
640 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
641 if (zip_entry == NULL) {
642 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
643 }
644
645 // lock the loader
646 Thread* thread = Thread::current();
647 HandleMark hm;
648 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
649
650 ObjectLocker ol(loader_lock, thread);
651
652 // add the jar file to the bootclasspath
653 log_info(class, load)("opened: %s", zip_entry->name());
654 #if INCLUDE_CDS
655 ClassLoaderExt::append_boot_classpath(zip_entry);
656 #else
657 ClassLoader::add_to_boot_append_entries(zip_entry);
658 #endif
659 return JVMTI_ERROR_NONE;
660 } else {
661 return JVMTI_ERROR_WRONG_PHASE;
662 }
663
664 } /* end AddToBootstrapClassLoaderSearch */
665
666
667 // segment - pre-checked for NULL
668 jvmtiError
669 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
670 jvmtiPhase phase = get_phase();
671
672 if (phase == JVMTI_PHASE_ONLOAD) {
673 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
674 if (strcmp("java.class.path", p->key()) == 0) {
675 p->append_value(segment);
676 break;
677 }
678 }
679 return JVMTI_ERROR_NONE;
680 } else if (phase == JVMTI_PHASE_LIVE) {
681 // The phase is checked by the wrapper that called this function,
682 // but this thread could be racing with the thread that is
683 // terminating the VM so we check one more time.
684 HandleMark hm;
685
686 // create the zip entry (which will open the zip file and hence
687 // check that the segment is indeed a zip file).
688 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
689 if (zip_entry == NULL) {
690 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
691 }
692 delete zip_entry; // no longer needed
693
694 // lock the loader
695 Thread* THREAD = Thread::current();
696 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
697
698 ObjectLocker ol(loader, THREAD);
699
700 // need the path as java.lang.String
701 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
702 if (HAS_PENDING_EXCEPTION) {
703 CLEAR_PENDING_EXCEPTION;
704 return JVMTI_ERROR_INTERNAL;
705 }
706
707 // Invoke the appendToClassPathForInstrumentation method - if the method
708 // is not found it means the loader doesn't support adding to the class path
709 // in the live phase.
710 {
711 JavaValue res(T_VOID);
712 JavaCalls::call_special(&res,
713 loader,
714 loader->klass(),
715 vmSymbols::appendToClassPathForInstrumentation_name(),
716 vmSymbols::appendToClassPathForInstrumentation_signature(),
717 path,
718 THREAD);
719 if (HAS_PENDING_EXCEPTION) {
720 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
721 CLEAR_PENDING_EXCEPTION;
722
723 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
724 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
725 } else {
726 return JVMTI_ERROR_INTERNAL;
727 }
728 }
729 }
730
731 return JVMTI_ERROR_NONE;
732 } else {
733 return JVMTI_ERROR_WRONG_PHASE;
734 }
735 } /* end AddToSystemClassLoaderSearch */
736
737 //
738 // General functions
739 //
740
741 // phase_ptr - pre-checked for NULL
742 jvmtiError
743 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
744 *phase_ptr = phase();
745 return JVMTI_ERROR_NONE;
746 } /* end GetPhase */
747
748
749 jvmtiError
750 JvmtiEnv::DisposeEnvironment() {
751 dispose();
752 return JVMTI_ERROR_NONE;
753 } /* end DisposeEnvironment */
754
755
756 // data - NULL is a valid value, must be checked
757 jvmtiError
758 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
759 set_env_local_storage(data);
760 return JVMTI_ERROR_NONE;
761 } /* end SetEnvironmentLocalStorage */
762
763
764 // data_ptr - pre-checked for NULL
765 jvmtiError
766 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
767 *data_ptr = (void*)get_env_local_storage();
768 return JVMTI_ERROR_NONE;
769 } /* end GetEnvironmentLocalStorage */
770
771 // version_ptr - pre-checked for NULL
772 jvmtiError
773 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
774 *version_ptr = JVMTI_VERSION;
775 return JVMTI_ERROR_NONE;
776 } /* end GetVersionNumber */
777
778
779 // name_ptr - pre-checked for NULL
780 jvmtiError
781 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
782 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
783 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
784 }
785 const char *name = JvmtiUtil::error_name(error);
786 if (name == NULL) {
787 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
788 }
789 size_t len = strlen(name) + 1;
790 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
791 if (err == JVMTI_ERROR_NONE) {
792 memcpy(*name_ptr, name, len);
793 }
794 return err;
795 } /* end GetErrorName */
796
797
798 jvmtiError
799 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
800 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
801 switch (flag) {
802 case JVMTI_VERBOSE_OTHER:
803 // ignore
804 break;
805 case JVMTI_VERBOSE_CLASS:
806 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
807 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
808 break;
809 case JVMTI_VERBOSE_GC:
810 if (value == 0) {
811 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
812 } else {
813 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
814 }
815 break;
816 case JVMTI_VERBOSE_JNI:
817 PrintJNIResolving = value != 0;
818 break;
819 default:
820 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
821 };
822 return JVMTI_ERROR_NONE;
823 } /* end SetVerboseFlag */
824
825
826 // format_ptr - pre-checked for NULL
827 jvmtiError
828 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
829 *format_ptr = JVMTI_JLOCATION_JVMBCI;
830 return JVMTI_ERROR_NONE;
831 } /* end GetJLocationFormat */
832
833 //
834 // Thread functions
835 //
836
837 // Threads_lock NOT held
838 // thread - NOT pre-checked
839 // thread_state_ptr - pre-checked for NULL
840 jvmtiError
841 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
842 JavaThread* current_thread = JavaThread::current();
843 JavaThread* java_thread = NULL;
844 oop thread_oop = NULL;
845 ThreadsListHandle tlh(current_thread);
846
847 if (thread == NULL) {
848 java_thread = current_thread;
849 thread_oop = java_thread->threadObj();
850
851 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
852 return JVMTI_ERROR_INVALID_THREAD;
853 }
854 } else {
855 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
856 if (err != JVMTI_ERROR_NONE) {
857 // We got an error code so we don't have a JavaThread *, but
858 // only return an error from here if we didn't get a valid
859 // thread_oop.
860 if (thread_oop == NULL) {
861 return err;
862 }
863 // We have a valid thread_oop so we can return some thread state.
864 }
865 }
866
867 // get most state bits
868 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
869
870 if (java_thread != NULL) {
871 // We have a JavaThread* so add more state bits.
872 JavaThreadState jts = java_thread->thread_state();
873
874 if (java_thread->is_being_ext_suspended()) {
875 state |= JVMTI_THREAD_STATE_SUSPENDED;
876 }
877 if (jts == _thread_in_native) {
878 state |= JVMTI_THREAD_STATE_IN_NATIVE;
879 }
880 OSThread* osThread = java_thread->osthread();
881 if (osThread != NULL && osThread->interrupted()) {
882 state |= JVMTI_THREAD_STATE_INTERRUPTED;
883 }
884 }
885
886 *thread_state_ptr = state;
887 return JVMTI_ERROR_NONE;
888 } /* end GetThreadState */
889
890
891 // thread_ptr - pre-checked for NULL
892 jvmtiError
893 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
894 JavaThread* current_thread = JavaThread::current();
895 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
896 return JVMTI_ERROR_NONE;
897 } /* end GetCurrentThread */
898
899
900 // threads_count_ptr - pre-checked for NULL
901 // threads_ptr - pre-checked for NULL
902 jvmtiError
903 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
904 int nthreads = 0;
905 Handle *thread_objs = NULL;
906 ResourceMark rm;
907 HandleMark hm;
908
909 // enumerate threads (including agent threads)
910 ThreadsListEnumerator tle(Thread::current(), true);
911 nthreads = tle.num_threads();
912 *threads_count_ptr = nthreads;
913
914 if (nthreads == 0) {
915 *threads_ptr = NULL;
916 return JVMTI_ERROR_NONE;
917 }
918
919 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
920 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
921
922 for (int i=0; i < nthreads; i++) {
923 thread_objs[i] = Handle(tle.get_threadObj(i));
924 }
925
926 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
927 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
928
929 *threads_ptr = jthreads;
930 return JVMTI_ERROR_NONE;
931 } /* end GetAllThreads */
932
933
934 // Threads_lock NOT held, java_thread not protected by lock
935 // java_thread - pre-checked
936 jvmtiError
937 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
938 // don't allow hidden thread suspend request.
939 if (java_thread->is_hidden_from_external_view()) {
940 return (JVMTI_ERROR_NONE);
941 }
942
943 {
944 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
945 if (java_thread->is_external_suspend()) {
946 // don't allow nested external suspend requests.
947 return (JVMTI_ERROR_THREAD_SUSPENDED);
948 }
949 if (java_thread->is_exiting()) { // thread is in the process of exiting
950 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
951 }
952 java_thread->set_external_suspend();
953 }
954
955 if (!JvmtiSuspendControl::suspend(java_thread)) {
956 // the thread was in the process of exiting
957 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
958 }
959 return JVMTI_ERROR_NONE;
960 } /* end SuspendThread */
961
962
963 // request_count - pre-checked to be greater than or equal to 0
964 // request_list - pre-checked for NULL
965 // results - pre-checked for NULL
966 jvmtiError
967 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
968 int needSafepoint = 0; // > 0 if we need a safepoint
969 ThreadsListHandle tlh;
970 for (int i = 0; i < request_count; i++) {
971 JavaThread *java_thread = NULL;
972 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
973 if (err != JVMTI_ERROR_NONE) {
974 results[i] = err;
975 continue;
976 }
977 // don't allow hidden thread suspend request.
978 if (java_thread->is_hidden_from_external_view()) {
979 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
980 continue;
981 }
982
983 {
984 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
985 if (java_thread->is_external_suspend()) {
986 // don't allow nested external suspend requests.
987 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
988 continue;
989 }
990 if (java_thread->is_exiting()) { // thread is in the process of exiting
991 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
992 continue;
993 }
994 java_thread->set_external_suspend();
995 }
996 if (java_thread->thread_state() == _thread_in_native) {
997 // We need to try and suspend native threads here. Threads in
998 // other states will self-suspend on their next transition.
999 if (!JvmtiSuspendControl::suspend(java_thread)) {
1000 // The thread was in the process of exiting. Force another
1001 // safepoint to make sure that this thread transitions.
1002 needSafepoint++;
1003 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1004 continue;
1005 }
1006 } else {
1007 needSafepoint++;
1008 }
1009 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1010 }
1011 if (needSafepoint > 0) {
1012 VM_ThreadsSuspendJVMTI tsj;
1013 VMThread::execute(&tsj);
1014 }
1015 // per-thread suspend results returned via results parameter
1016 return JVMTI_ERROR_NONE;
1017 } /* end SuspendThreadList */
1018
1019
1020 // Threads_lock NOT held, java_thread not protected by lock
1021 // java_thread - pre-checked
1022 jvmtiError
1023 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1024 // don't allow hidden thread resume request.
1025 if (java_thread->is_hidden_from_external_view()) {
1026 return JVMTI_ERROR_NONE;
1027 }
1028
1029 if (!java_thread->is_being_ext_suspended()) {
1030 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1031 }
1032
1033 if (!JvmtiSuspendControl::resume(java_thread)) {
1034 return JVMTI_ERROR_INTERNAL;
1035 }
1036 return JVMTI_ERROR_NONE;
1037 } /* end ResumeThread */
1038
1039
1040 // request_count - pre-checked to be greater than or equal to 0
1041 // request_list - pre-checked for NULL
1042 // results - pre-checked for NULL
1043 jvmtiError
1044 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1045 ThreadsListHandle tlh;
1046 for (int i = 0; i < request_count; i++) {
1047 JavaThread* java_thread = NULL;
1048 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1049 if (err != JVMTI_ERROR_NONE) {
1050 results[i] = err;
1051 continue;
1052 }
1053 // don't allow hidden thread resume request.
1054 if (java_thread->is_hidden_from_external_view()) {
1055 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1056 continue;
1057 }
1058 if (!java_thread->is_being_ext_suspended()) {
1059 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1060 continue;
1061 }
1062
1063 if (!JvmtiSuspendControl::resume(java_thread)) {
1064 results[i] = JVMTI_ERROR_INTERNAL;
1065 continue;
1066 }
1067
1068 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1069 }
1070 // per-thread resume results returned via results parameter
1071 return JVMTI_ERROR_NONE;
1072 } /* end ResumeThreadList */
1073
1074
1075 // Threads_lock NOT held, java_thread not protected by lock
1076 // java_thread - pre-checked
1077 jvmtiError
1078 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1079 oop e = JNIHandles::resolve_external_guard(exception);
1080 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1081
1082 JavaThread::send_async_exception(java_thread->threadObj(), e);
1083
1084 return JVMTI_ERROR_NONE;
1085
1086 } /* end StopThread */
1087
1088
1089 // Threads_lock NOT held
1090 // thread - NOT pre-checked
1091 jvmtiError
1092 JvmtiEnv::InterruptThread(jthread thread) {
1093 // TODO: this is very similar to JVM_Interrupt(); share code in future
1094 JavaThread* current_thread = JavaThread::current();
1095 JavaThread* java_thread = NULL;
1096 ThreadsListHandle tlh(current_thread);
1097 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1098 if (err != JVMTI_ERROR_NONE) {
1099 return err;
1100 }
1101
1102 Thread::interrupt(java_thread);
1103
1104 return JVMTI_ERROR_NONE;
1105 } /* end InterruptThread */
1106
1107
1108 // Threads_lock NOT held
1109 // thread - NOT pre-checked
1110 // info_ptr - pre-checked for NULL
1111 jvmtiError
1112 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1113 ResourceMark rm;
1114 HandleMark hm;
1115
1116 JavaThread* current_thread = JavaThread::current();
1117 ThreadsListHandle tlh(current_thread);
1118
1119 // if thread is NULL the current thread is used
1120 oop thread_oop = NULL;
1121 if (thread == NULL) {
1122 thread_oop = current_thread->threadObj();
1123 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1124 return JVMTI_ERROR_INVALID_THREAD;
1125 }
1126 } else {
1127 JavaThread* java_thread = NULL;
1128 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1129 if (err != JVMTI_ERROR_NONE) {
1130 // We got an error code so we don't have a JavaThread *, but
1131 // only return an error from here if we didn't get a valid
1132 // thread_oop.
1133 if (thread_oop == NULL) {
1134 return err;
1135 }
1136 // We have a valid thread_oop so we can return some thread info.
1137 }
1138 }
1139
1140 Handle thread_obj(current_thread, thread_oop);
1141 Handle name;
1142 ThreadPriority priority;
1143 Handle thread_group;
1144 Handle context_class_loader;
1145 bool is_daemon;
1146
1147 { MutexLocker mu(Threads_lock);
1148
1149 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1150 priority = java_lang_Thread::priority(thread_obj());
1151 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1152 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1153
1154 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1155 context_class_loader = Handle(current_thread, loader);
1156 }
1157 { const char *n;
1158
1159 if (name() != NULL) {
1160 n = java_lang_String::as_utf8_string(name());
1161 } else {
1162 int utf8_length = 0;
1163 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1164 }
1165
1166 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1167 if (info_ptr->name == NULL)
1168 return JVMTI_ERROR_OUT_OF_MEMORY;
1169
1170 strcpy(info_ptr->name, n);
1171 }
1172 info_ptr->is_daemon = is_daemon;
1173 info_ptr->priority = priority;
1174
1175 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1176 jni_reference(context_class_loader);
1177 info_ptr->thread_group = jni_reference(thread_group);
1178
1179 return JVMTI_ERROR_NONE;
1180 } /* end GetThreadInfo */
1181
1182
1183 // Threads_lock NOT held, java_thread not protected by lock
1184 // java_thread - pre-checked
1185 // owned_monitor_count_ptr - pre-checked for NULL
1186 // owned_monitors_ptr - pre-checked for NULL
1187 jvmtiError
1188 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1189 jvmtiError err = JVMTI_ERROR_NONE;
1190 JavaThread* calling_thread = JavaThread::current();
1191
1192 // growable array of jvmti monitors info on the C-heap
1193 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1194 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1195
1196 // It is only safe to perform the direct operation on the current
1197 // thread. All other usage needs to use a vm-safepoint-op for safety.
1198 if (java_thread == calling_thread) {
1199 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1200 } else {
1201 // JVMTI get monitors info at safepoint. Do not require target thread to
1202 // be suspended.
1203 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1204 VMThread::execute(&op);
1205 err = op.result();
1206 }
1207 jint owned_monitor_count = owned_monitors_list->length();
1208 if (err == JVMTI_ERROR_NONE) {
1209 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1210 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1211 // copy into the returned array
1212 for (int i = 0; i < owned_monitor_count; i++) {
1213 (*owned_monitors_ptr)[i] =
1214 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1215 }
1216 *owned_monitor_count_ptr = owned_monitor_count;
1217 }
1218 }
1219 // clean up.
1220 for (int i = 0; i < owned_monitor_count; i++) {
1221 deallocate((unsigned char*)owned_monitors_list->at(i));
1222 }
1223 delete owned_monitors_list;
1224
1225 return err;
1226 } /* end GetOwnedMonitorInfo */
1227
1228
1229 // Threads_lock NOT held, java_thread not protected by lock
1230 // java_thread - pre-checked
1231 // monitor_info_count_ptr - pre-checked for NULL
1232 // monitor_info_ptr - pre-checked for NULL
1233 jvmtiError
1234 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1235 jvmtiError err = JVMTI_ERROR_NONE;
1236 JavaThread* calling_thread = JavaThread::current();
1237
1238 // growable array of jvmti monitors info on the C-heap
1239 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1240 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1241
1242 // It is only safe to perform the direct operation on the current
1243 // thread. All other usage needs to use a vm-safepoint-op for safety.
1244 if (java_thread == calling_thread) {
1245 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1246 } else {
1247 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1248 // be suspended.
1249 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1250 VMThread::execute(&op);
1251 err = op.result();
1252 }
1253
1254 jint owned_monitor_count = owned_monitors_list->length();
1255 if (err == JVMTI_ERROR_NONE) {
1256 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1257 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1258 // copy to output array.
1259 for (int i = 0; i < owned_monitor_count; i++) {
1260 (*monitor_info_ptr)[i].monitor =
1261 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1262 (*monitor_info_ptr)[i].stack_depth =
1263 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1264 }
1265 }
1266 *monitor_info_count_ptr = owned_monitor_count;
1267 }
1268
1269 // clean up.
1270 for (int i = 0; i < owned_monitor_count; i++) {
1271 deallocate((unsigned char*)owned_monitors_list->at(i));
1272 }
1273 delete owned_monitors_list;
1274
1275 return err;
1276 } /* end GetOwnedMonitorStackDepthInfo */
1277
1278
1279 // Threads_lock NOT held, java_thread not protected by lock
1280 // java_thread - pre-checked
1281 // monitor_ptr - pre-checked for NULL
1282 jvmtiError
1283 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1284 jvmtiError err = JVMTI_ERROR_NONE;
1285 JavaThread* calling_thread = JavaThread::current();
1286
1287 // It is only safe to perform the direct operation on the current
1288 // thread. All other usage needs to use a vm-safepoint-op for safety.
1289 if (java_thread == calling_thread) {
1290 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1291 } else {
1292 // get contended monitor information at safepoint.
1293 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1294 VMThread::execute(&op);
1295 err = op.result();
1296 }
1297 return err;
1298 } /* end GetCurrentContendedMonitor */
1299
1300
1301 // Threads_lock NOT held
1302 // thread - NOT pre-checked
1303 // proc - pre-checked for NULL
1304 // arg - NULL is a valid value, must be checked
1305 jvmtiError
1306 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1307 JavaThread* current_thread = JavaThread::current();
1308
1309 JavaThread* java_thread = NULL;
1310 oop thread_oop = NULL;
1311 ThreadsListHandle tlh(current_thread);
1312 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1313 if (err != JVMTI_ERROR_NONE) {
1314 // We got an error code so we don't have a JavaThread *, but
1315 // only return an error from here if we didn't get a valid
1316 // thread_oop.
1317 if (thread_oop == NULL) {
1318 return err;
1319 }
1320 // We have a valid thread_oop.
1321 }
1322
1323 if (java_thread != NULL) {
1324 // 'thread' refers to an existing JavaThread.
1325 return JVMTI_ERROR_INVALID_THREAD;
1326 }
1327
1328 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1329 return JVMTI_ERROR_INVALID_PRIORITY;
1330 }
1331
1332 Handle thread_hndl(current_thread, thread_oop);
1333 {
1334 MutexLocker mu(Threads_lock); // grab Threads_lock
1335
1336 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1337
1338 // At this point it may be possible that no osthread was created for the
1339 // JavaThread due to lack of memory.
1340 if (new_thread == NULL || new_thread->osthread() == NULL) {
1341 if (new_thread != NULL) {
1342 new_thread->smr_delete();
1343 }
1344 return JVMTI_ERROR_OUT_OF_MEMORY;
1345 }
1346
1347 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1348 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1349 java_lang_Thread::set_daemon(thread_hndl());
1350
1351 new_thread->set_threadObj(thread_hndl());
1352 Threads::add(new_thread);
1353 Thread::start(new_thread);
1354 } // unlock Threads_lock
1355
1356 return JVMTI_ERROR_NONE;
1357 } /* end RunAgentThread */
1358
1359 //
1360 // Thread Group functions
1361 //
1362
1363 // group_count_ptr - pre-checked for NULL
1364 // groups_ptr - pre-checked for NULL
1365 jvmtiError
1366 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1367 JavaThread* current_thread = JavaThread::current();
1368
1369 // Only one top level thread group now.
1370 *group_count_ptr = 1;
1371
1372 // Allocate memory to store global-refs to the thread groups.
1373 // Assume this area is freed by caller.
1374 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1375
1376 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1377
1378 // Convert oop to Handle, then convert Handle to global-ref.
1379 {
1380 HandleMark hm(current_thread);
1381 Handle system_thread_group(current_thread, Universe::system_thread_group());
1382 *groups_ptr[0] = jni_reference(system_thread_group);
1383 }
1384
1385 return JVMTI_ERROR_NONE;
1386 } /* end GetTopThreadGroups */
1387
1388
1389 // info_ptr - pre-checked for NULL
1390 jvmtiError
1391 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1392 ResourceMark rm;
1393 HandleMark hm;
1394
1395 JavaThread* current_thread = JavaThread::current();
1396
1397 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1398 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1399
1400 const char* name;
1401 Handle parent_group;
1402 bool is_daemon;
1403 ThreadPriority max_priority;
1404
1405 { MutexLocker mu(Threads_lock);
1406
1407 name = java_lang_ThreadGroup::name(group_obj());
1408 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1409 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1410 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1411 }
1412
1413 info_ptr->is_daemon = is_daemon;
1414 info_ptr->max_priority = max_priority;
1415 info_ptr->parent = jni_reference(parent_group);
1416
1417 if (name != NULL) {
1418 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1419 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1420 strcpy(info_ptr->name, name);
1421 } else {
1422 info_ptr->name = NULL;
1423 }
1424
1425 return JVMTI_ERROR_NONE;
1426 } /* end GetThreadGroupInfo */
1427
1428
1429 // thread_count_ptr - pre-checked for NULL
1430 // threads_ptr - pre-checked for NULL
1431 // group_count_ptr - pre-checked for NULL
1432 // groups_ptr - pre-checked for NULL
1433 jvmtiError
1434 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1435 JavaThread* current_thread = JavaThread::current();
1436 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1437 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1438
1439 Handle *thread_objs = NULL;
1440 Handle *group_objs = NULL;
1441 int nthreads = 0;
1442 int ngroups = 0;
1443 int hidden_threads = 0;
1444
1445 ResourceMark rm(current_thread);
1446 HandleMark hm(current_thread);
1447
1448 Handle group_hdl(current_thread, group_obj);
1449
1450 { // Cannot allow thread or group counts to change.
1451 MutexLocker mu(Threads_lock);
1452
1453 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1454 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1455
1456 if (nthreads > 0) {
1457 ThreadsListHandle tlh(current_thread);
1458 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1459 assert(nthreads <= threads->length(), "too many threads");
1460 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1461 for (int i=0, j=0; i<nthreads; i++) {
1462 oop thread_obj = threads->obj_at(i);
1463 assert(thread_obj != NULL, "thread_obj is NULL");
1464 JavaThread *java_thread = NULL;
1465 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1466 if (err == JVMTI_ERROR_NONE) {
1467 // Have a valid JavaThread*.
1468 if (java_thread->is_hidden_from_external_view()) {
1469 // Filter out hidden java threads.
1470 hidden_threads++;
1471 continue;
1472 }
1473 } else {
1474 // We couldn't convert thread_obj into a JavaThread*.
1475 if (err == JVMTI_ERROR_INVALID_THREAD) {
1476 // The thread_obj does not refer to a java.lang.Thread object
1477 // so skip it.
1478 hidden_threads++;
1479 continue;
1480 }
1481 // We have a valid thread_obj, but no JavaThread*; the caller
1482 // can still have limited use for the thread_obj.
1483 }
1484 thread_objs[j++] = Handle(current_thread, thread_obj);
1485 }
1486 nthreads -= hidden_threads;
1487 } // ThreadsListHandle is destroyed here.
1488
1489 if (ngroups > 0) {
1490 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1491 assert(ngroups <= groups->length(), "too many groups");
1492 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1493 for (int i=0; i<ngroups; i++) {
1494 oop group_obj = groups->obj_at(i);
1495 assert(group_obj != NULL, "group_obj != NULL");
1496 group_objs[i] = Handle(current_thread, group_obj);
1497 }
1498 }
1499 }
1500
1501 // have to make global handles outside of Threads_lock
1502 *group_count_ptr = ngroups;
1503 *thread_count_ptr = nthreads;
1504 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1505 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1506 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1507 return JVMTI_ERROR_OUT_OF_MEMORY;
1508 }
1509 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1510 return JVMTI_ERROR_OUT_OF_MEMORY;
1511 }
1512
1513 return JVMTI_ERROR_NONE;
1514 } /* end GetThreadGroupChildren */
1515
1516
1517 //
1518 // Stack Frame functions
1519 //
1520
1521 // Threads_lock NOT held, java_thread not protected by lock
1522 // java_thread - pre-checked
1523 // max_frame_count - pre-checked to be greater than or equal to 0
1524 // frame_buffer - pre-checked for NULL
1525 // count_ptr - pre-checked for NULL
1526 jvmtiError
1527 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1528 jvmtiError err = JVMTI_ERROR_NONE;
1529
1530 // It is only safe to perform the direct operation on the current
1531 // thread. All other usage needs to use a vm-safepoint-op for safety.
1532 if (java_thread == JavaThread::current()) {
1533 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1534 } else {
1535 // JVMTI get stack trace at safepoint. Do not require target thread to
1536 // be suspended.
1537 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1538 VMThread::execute(&op);
1539 err = op.result();
1540 }
1541
1542 return err;
1543 } /* end GetStackTrace */
1544
1545
1546 // max_frame_count - pre-checked to be greater than or equal to 0
1547 // stack_info_ptr - pre-checked for NULL
1548 // thread_count_ptr - pre-checked for NULL
1549 jvmtiError
1550 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1551 jvmtiError err = JVMTI_ERROR_NONE;
1552 JavaThread* calling_thread = JavaThread::current();
1553
1554 // JVMTI get stack traces at safepoint.
1555 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1556 VMThread::execute(&op);
1557 *thread_count_ptr = op.final_thread_count();
1558 *stack_info_ptr = op.stack_info();
1559 err = op.result();
1560 return err;
1561 } /* end GetAllStackTraces */
1562
1563
1564 // thread_count - pre-checked to be greater than or equal to 0
1565 // thread_list - pre-checked for NULL
1566 // max_frame_count - pre-checked to be greater than or equal to 0
1567 // stack_info_ptr - pre-checked for NULL
1568 jvmtiError
1569 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1570 jvmtiError err = JVMTI_ERROR_NONE;
1571 // JVMTI get stack traces at safepoint.
1572 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1573 VMThread::execute(&op);
1574 err = op.result();
1575 if (err == JVMTI_ERROR_NONE) {
1576 *stack_info_ptr = op.stack_info();
1577 }
1578 return err;
1579 } /* end GetThreadListStackTraces */
1580
1581
1582 // Threads_lock NOT held, java_thread not protected by lock
1583 // java_thread - pre-checked
1584 // count_ptr - pre-checked for NULL
1585 jvmtiError
1586 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1587 jvmtiError err = JVMTI_ERROR_NONE;
1588
1589 // retrieve or create JvmtiThreadState.
1590 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1591 if (state == NULL) {
1592 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1593 }
1594
1595 // It is only safe to perform the direct operation on the current
1596 // thread. All other usage needs to use a vm-safepoint-op for safety.
1597 if (java_thread == JavaThread::current()) {
1598 err = get_frame_count(state, count_ptr);
1599 } else {
1600 // get java stack frame count at safepoint.
1601 VM_GetFrameCount op(this, state, count_ptr);
1602 VMThread::execute(&op);
1603 err = op.result();
1604 }
1605 return err;
1606 } /* end GetFrameCount */
1607
1608
1609 // Threads_lock NOT held, java_thread not protected by lock
1610 // java_thread - pre-checked
1611 jvmtiError
1612 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1613 JavaThread* current_thread = JavaThread::current();
1614 HandleMark hm(current_thread);
1615 uint32_t debug_bits = 0;
1616
1617 // retrieve or create the state
1618 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1619 if (state == NULL) {
1620 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1621 }
1622
1623 // Check if java_thread is fully suspended
1624 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1625 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1626 }
1627 // Check to see if a PopFrame was already in progress
1628 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1629 // Probably possible for JVMTI clients to trigger this, but the
1630 // JPDA backend shouldn't allow this to happen
1631 return JVMTI_ERROR_INTERNAL;
1632 }
1633
1634 {
1635 // Was workaround bug
1636 // 4812902: popFrame hangs if the method is waiting at a synchronize
1637 // Catch this condition and return an error to avoid hanging.
1638 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1639 OSThread* osThread = java_thread->osthread();
1640 if (osThread->get_state() == MONITOR_WAIT) {
1641 return JVMTI_ERROR_OPAQUE_FRAME;
1642 }
1643 }
1644
1645 {
1646 ResourceMark rm(current_thread);
1647 // Check if there are more than one Java frame in this thread, that the top two frames
1648 // are Java (not native) frames, and that there is no intervening VM frame
1649 int frame_count = 0;
1650 bool is_interpreted[2];
1651 intptr_t *frame_sp[2];
1652 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1653 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1654 methodHandle mh(current_thread, vfs.method());
1655 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1656 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1657 frame_sp[frame_count] = vfs.frame_id();
1658 if (++frame_count > 1) break;
1659 }
1660 if (frame_count < 2) {
1661 // We haven't found two adjacent non-native Java frames on the top.
1662 // There can be two situations here:
1663 // 1. There are no more java frames
1664 // 2. Two top java frames are separated by non-java native frames
1665 if(vframeFor(java_thread, 1) == NULL) {
1666 return JVMTI_ERROR_NO_MORE_FRAMES;
1667 } else {
1668 // Intervening non-java native or VM frames separate java frames.
1669 // Current implementation does not support this. See bug #5031735.
1670 // In theory it is possible to pop frames in such cases.
1671 return JVMTI_ERROR_OPAQUE_FRAME;
1672 }
1673 }
1674
1675 // If any of the top 2 frames is a compiled one, need to deoptimize it
1676 for (int i = 0; i < 2; i++) {
1677 if (!is_interpreted[i]) {
1678 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1679 }
1680 }
1681
1682 // Update the thread state to reflect that the top frame is popped
1683 // so that cur_stack_depth is maintained properly and all frameIDs
1684 // are invalidated.
1685 // The current frame will be popped later when the suspended thread
1686 // is resumed and right before returning from VM to Java.
1687 // (see call_VM_base() in assembler_<cpu>.cpp).
1688
1689 // It's fine to update the thread state here because no JVMTI events
1690 // shall be posted for this PopFrame.
1691
1692 // It is only safe to perform the direct operation on the current
1693 // thread. All other usage needs to use a vm-safepoint-op for safety.
1694 if (java_thread == JavaThread::current()) {
1695 state->update_for_pop_top_frame();
1696 } else {
1697 VM_UpdateForPopTopFrame op(state);
1698 VMThread::execute(&op);
1699 jvmtiError err = op.result();
1700 if (err != JVMTI_ERROR_NONE) {
1701 return err;
1702 }
1703 }
1704
1705 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1706 // Set pending step flag for this popframe and it is cleared when next
1707 // step event is posted.
1708 state->set_pending_step_for_popframe();
1709 }
1710
1711 return JVMTI_ERROR_NONE;
1712 } /* end PopFrame */
1713
1714
1715 // Threads_lock NOT held, java_thread not protected by lock
1716 // java_thread - pre-checked
1717 // java_thread - unchecked
1718 // depth - pre-checked as non-negative
1719 // method_ptr - pre-checked for NULL
1720 // location_ptr - pre-checked for NULL
1721 jvmtiError
1722 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1723 jvmtiError err = JVMTI_ERROR_NONE;
1724
1725 // It is only safe to perform the direct operation on the current
1726 // thread. All other usage needs to use a vm-safepoint-op for safety.
1727 if (java_thread == JavaThread::current()) {
1728 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1729 } else {
1730 // JVMTI get java stack frame location at safepoint.
1731 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1732 VMThread::execute(&op);
1733 err = op.result();
1734 }
1735 return err;
1736 } /* end GetFrameLocation */
1737
1738
1739 // Threads_lock NOT held, java_thread not protected by lock
1740 // java_thread - pre-checked
1741 // java_thread - unchecked
1742 // depth - pre-checked as non-negative
1743 jvmtiError
1744 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1745 jvmtiError err = JVMTI_ERROR_NONE;
1746 ResourceMark rm;
1747 uint32_t debug_bits = 0;
1748
1749 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1750 if (state == NULL) {
1751 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1752 }
1753
1754 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1755 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1756 }
1757
1758 if (TraceJVMTICalls) {
1759 JvmtiSuspendControl::print();
1760 }
1761
1762 vframe *vf = vframeFor(java_thread, depth);
1763 if (vf == NULL) {
1764 return JVMTI_ERROR_NO_MORE_FRAMES;
1765 }
1766
1767 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1768 return JVMTI_ERROR_OPAQUE_FRAME;
1769 }
1770
1771 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1772
1773 // It is only safe to perform the direct operation on the current
1774 // thread. All other usage needs to use a vm-safepoint-op for safety.
1775 if (java_thread == JavaThread::current()) {
1776 int frame_number = state->count_frames() - depth;
1777 state->env_thread_state(this)->set_frame_pop(frame_number);
1778 } else {
1779 VM_SetFramePop op(this, state, depth);
1780 VMThread::execute(&op);
1781 err = op.result();
1782 }
1783 return err;
1784 } /* end NotifyFramePop */
1785
1786
1787 //
1788 // Force Early Return functions
1789 //
1790
1791 // Threads_lock NOT held, java_thread not protected by lock
1792 // java_thread - pre-checked
1793 jvmtiError
1794 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1795 jvalue val;
1796 val.l = value;
1797 return force_early_return(java_thread, val, atos);
1798 } /* end ForceEarlyReturnObject */
1799
1800
1801 // Threads_lock NOT held, java_thread not protected by lock
1802 // java_thread - pre-checked
1803 jvmtiError
1804 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1805 jvalue val;
1806 val.i = value;
1807 return force_early_return(java_thread, val, itos);
1808 } /* end ForceEarlyReturnInt */
1809
1810
1811 // Threads_lock NOT held, java_thread not protected by lock
1812 // java_thread - pre-checked
1813 jvmtiError
1814 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1815 jvalue val;
1816 val.j = value;
1817 return force_early_return(java_thread, val, ltos);
1818 } /* end ForceEarlyReturnLong */
1819
1820
1821 // Threads_lock NOT held, java_thread not protected by lock
1822 // java_thread - pre-checked
1823 jvmtiError
1824 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1825 jvalue val;
1826 val.f = value;
1827 return force_early_return(java_thread, val, ftos);
1828 } /* end ForceEarlyReturnFloat */
1829
1830
1831 // Threads_lock NOT held, java_thread not protected by lock
1832 // java_thread - pre-checked
1833 jvmtiError
1834 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1835 jvalue val;
1836 val.d = value;
1837 return force_early_return(java_thread, val, dtos);
1838 } /* end ForceEarlyReturnDouble */
1839
1840
1841 // Threads_lock NOT held, java_thread not protected by lock
1842 // java_thread - pre-checked
1843 jvmtiError
1844 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1845 jvalue val;
1846 val.j = 0L;
1847 return force_early_return(java_thread, val, vtos);
1848 } /* end ForceEarlyReturnVoid */
1849
1850
1851 //
1852 // Heap functions
1853 //
1854
1855 // klass - NULL is a valid value, must be checked
1856 // initial_object - NULL is a valid value, must be checked
1857 // callbacks - pre-checked for NULL
1858 // user_data - NULL is a valid value, must be checked
1859 jvmtiError
1860 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1861 // check klass if provided
1862 Klass* k = NULL;
1863 if (klass != NULL) {
1864 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1865 if (k_mirror == NULL) {
1866 return JVMTI_ERROR_INVALID_CLASS;
1867 }
1868 if (java_lang_Class::is_primitive(k_mirror)) {
1869 return JVMTI_ERROR_NONE;
1870 }
1871 k = java_lang_Class::as_Klass(k_mirror);
1872 if (klass == NULL) {
1873 return JVMTI_ERROR_INVALID_CLASS;
1874 }
1875 }
1876
1877 if (initial_object != NULL) {
1878 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1879 if (init_obj == NULL) {
1880 return JVMTI_ERROR_INVALID_OBJECT;
1881 }
1882 }
1883
1884 Thread *thread = Thread::current();
1885 HandleMark hm(thread);
1886
1887 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1888 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1889 return JVMTI_ERROR_NONE;
1890 } /* end FollowReferences */
1891
1892
1893 // klass - NULL is a valid value, must be checked
1894 // callbacks - pre-checked for NULL
1895 // user_data - NULL is a valid value, must be checked
1896 jvmtiError
1897 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1898 // check klass if provided
1899 Klass* k = NULL;
1900 if (klass != NULL) {
1901 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1902 if (k_mirror == NULL) {
1903 return JVMTI_ERROR_INVALID_CLASS;
1904 }
1905 if (java_lang_Class::is_primitive(k_mirror)) {
1906 return JVMTI_ERROR_NONE;
1907 }
1908 k = java_lang_Class::as_Klass(k_mirror);
1909 if (k == NULL) {
1910 return JVMTI_ERROR_INVALID_CLASS;
1911 }
1912 }
1913
1914 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1915 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1916 return JVMTI_ERROR_NONE;
1917 } /* end IterateThroughHeap */
1918
1919
1920 // tag_ptr - pre-checked for NULL
1921 jvmtiError
1922 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1923 oop o = JNIHandles::resolve_external_guard(object);
1924 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1925 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1926 return JVMTI_ERROR_NONE;
1927 } /* end GetTag */
1928
1929
1930 jvmtiError
1931 JvmtiEnv::SetTag(jobject object, jlong tag) {
1932 oop o = JNIHandles::resolve_external_guard(object);
1933 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1934 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1935 return JVMTI_ERROR_NONE;
1936 } /* end SetTag */
1937
1938
1939 // tag_count - pre-checked to be greater than or equal to 0
1940 // tags - pre-checked for NULL
1941 // count_ptr - pre-checked for NULL
1942 // object_result_ptr - NULL is a valid value, must be checked
1943 // tag_result_ptr - NULL is a valid value, must be checked
1944 jvmtiError
1945 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1946 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1947 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1948 } /* end GetObjectsWithTags */
1949
1950
1951 jvmtiError
1952 JvmtiEnv::ForceGarbageCollection() {
1953 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1954 return JVMTI_ERROR_NONE;
1955 } /* end ForceGarbageCollection */
1956
1957
1958 //
1959 // Heap (1.0) functions
1960 //
1961
1962 // object_reference_callback - pre-checked for NULL
1963 // user_data - NULL is a valid value, must be checked
1964 jvmtiError
1965 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1966 oop o = JNIHandles::resolve_external_guard(object);
1967 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1968 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1969 return JVMTI_ERROR_NONE;
1970 } /* end IterateOverObjectsReachableFromObject */
1971
1972
1973 // heap_root_callback - NULL is a valid value, must be checked
1974 // stack_ref_callback - NULL is a valid value, must be checked
1975 // object_ref_callback - NULL is a valid value, must be checked
1976 // user_data - NULL is a valid value, must be checked
1977 jvmtiError
1978 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1979 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1980 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1981 return JVMTI_ERROR_NONE;
1982 } /* end IterateOverReachableObjects */
1983
1984
1985 // heap_object_callback - pre-checked for NULL
1986 // user_data - NULL is a valid value, must be checked
1987 jvmtiError
1988 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1989 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1990 Thread *thread = Thread::current();
1991 HandleMark hm(thread);
1992 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
1993 return JVMTI_ERROR_NONE;
1994 } /* end IterateOverHeap */
1995
1996
1997 // k_mirror - may be primitive, this must be checked
1998 // heap_object_callback - pre-checked for NULL
1999 // user_data - NULL is a valid value, must be checked
2000 jvmtiError
2001 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
2002 if (java_lang_Class::is_primitive(k_mirror)) {
2003 // DO PRIMITIVE CLASS PROCESSING
2004 return JVMTI_ERROR_NONE;
2005 }
2006 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2007 if (klass == NULL) {
2008 return JVMTI_ERROR_INVALID_CLASS;
2009 }
2010 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2011 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2012 return JVMTI_ERROR_NONE;
2013 } /* end IterateOverInstancesOfClass */
2014
2015
2016 //
2017 // Local Variable functions
2018 //
2019
2020 // Threads_lock NOT held, java_thread not protected by lock
2021 // java_thread - pre-checked
2022 // java_thread - unchecked
2023 // depth - pre-checked as non-negative
2024 // value_ptr - pre-checked for NULL
2025 jvmtiError
2026 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2027 JavaThread* current_thread = JavaThread::current();
2028 // rm object is created to clean up the javaVFrame created in
2029 // doit_prologue(), but after doit() is finished with it.
2030 ResourceMark rm(current_thread);
2031
2032 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2033 VMThread::execute(&op);
2034 jvmtiError err = op.result();
2035 if (err != JVMTI_ERROR_NONE) {
2036 return err;
2037 } else {
2038 *value_ptr = op.value().l;
2039 return JVMTI_ERROR_NONE;
2040 }
2041 } /* end GetLocalObject */
2042
2043 // Threads_lock NOT held, java_thread not protected by lock
2044 // java_thread - pre-checked
2045 // java_thread - unchecked
2046 // depth - pre-checked as non-negative
2047 // value - pre-checked for NULL
2048 jvmtiError
2049 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2050 JavaThread* current_thread = JavaThread::current();
2051 // rm object is created to clean up the javaVFrame created in
2052 // doit_prologue(), but after doit() is finished with it.
2053 ResourceMark rm(current_thread);
2054
2055 VM_GetReceiver op(java_thread, current_thread, depth);
2056 VMThread::execute(&op);
2057 jvmtiError err = op.result();
2058 if (err != JVMTI_ERROR_NONE) {
2059 return err;
2060 } else {
2061 *value_ptr = op.value().l;
2062 return JVMTI_ERROR_NONE;
2063 }
2064 } /* end GetLocalInstance */
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::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* 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_INT);
2079 VMThread::execute(&op);
2080 *value_ptr = op.value().i;
2081 return op.result();
2082 } /* end GetLocalInt */
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 // value_ptr - pre-checked for NULL
2090 jvmtiError
2091 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2092 // rm object is created to clean up the javaVFrame created in
2093 // doit_prologue(), but after doit() is finished with it.
2094 ResourceMark rm;
2095
2096 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2097 VMThread::execute(&op);
2098 *value_ptr = op.value().j;
2099 return op.result();
2100 } /* end GetLocalLong */
2101
2102
2103 // Threads_lock NOT held, java_thread not protected by lock
2104 // java_thread - pre-checked
2105 // java_thread - unchecked
2106 // depth - pre-checked as non-negative
2107 // value_ptr - pre-checked for NULL
2108 jvmtiError
2109 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2110 // rm object is created to clean up the javaVFrame created in
2111 // doit_prologue(), but after doit() is finished with it.
2112 ResourceMark rm;
2113
2114 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2115 VMThread::execute(&op);
2116 *value_ptr = op.value().f;
2117 return op.result();
2118 } /* end GetLocalFloat */
2119
2120
2121 // Threads_lock NOT held, java_thread not protected by lock
2122 // java_thread - pre-checked
2123 // java_thread - unchecked
2124 // depth - pre-checked as non-negative
2125 // value_ptr - pre-checked for NULL
2126 jvmtiError
2127 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2128 // rm object is created to clean up the javaVFrame created in
2129 // doit_prologue(), but after doit() is finished with it.
2130 ResourceMark rm;
2131
2132 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2133 VMThread::execute(&op);
2134 *value_ptr = op.value().d;
2135 return op.result();
2136 } /* end GetLocalDouble */
2137
2138
2139 // Threads_lock NOT held, java_thread not protected by lock
2140 // java_thread - pre-checked
2141 // java_thread - unchecked
2142 // depth - pre-checked as non-negative
2143 jvmtiError
2144 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2145 // rm object is created to clean up the javaVFrame created in
2146 // doit_prologue(), but after doit() is finished with it.
2147 ResourceMark rm;
2148 jvalue val;
2149 val.l = value;
2150 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2151 VMThread::execute(&op);
2152 return op.result();
2153 } /* end SetLocalObject */
2154
2155
2156 // Threads_lock NOT held, java_thread not protected by lock
2157 // java_thread - pre-checked
2158 // java_thread - unchecked
2159 // depth - pre-checked as non-negative
2160 jvmtiError
2161 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2162 // rm object is created to clean up the javaVFrame created in
2163 // doit_prologue(), but after doit() is finished with it.
2164 ResourceMark rm;
2165 jvalue val;
2166 val.i = value;
2167 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2168 VMThread::execute(&op);
2169 return op.result();
2170 } /* end SetLocalInt */
2171
2172
2173 // Threads_lock NOT held, java_thread not protected by lock
2174 // java_thread - pre-checked
2175 // java_thread - unchecked
2176 // depth - pre-checked as non-negative
2177 jvmtiError
2178 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2179 // rm object is created to clean up the javaVFrame created in
2180 // doit_prologue(), but after doit() is finished with it.
2181 ResourceMark rm;
2182 jvalue val;
2183 val.j = value;
2184 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2185 VMThread::execute(&op);
2186 return op.result();
2187 } /* end SetLocalLong */
2188
2189
2190 // Threads_lock NOT held, java_thread not protected by lock
2191 // java_thread - pre-checked
2192 // java_thread - unchecked
2193 // depth - pre-checked as non-negative
2194 jvmtiError
2195 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2196 // rm object is created to clean up the javaVFrame created in
2197 // doit_prologue(), but after doit() is finished with it.
2198 ResourceMark rm;
2199 jvalue val;
2200 val.f = value;
2201 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2202 VMThread::execute(&op);
2203 return op.result();
2204 } /* end SetLocalFloat */
2205
2206
2207 // Threads_lock NOT held, java_thread not protected by lock
2208 // java_thread - pre-checked
2209 // java_thread - unchecked
2210 // depth - pre-checked as non-negative
2211 jvmtiError
2212 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2213 // rm object is created to clean up the javaVFrame created in
2214 // doit_prologue(), but after doit() is finished with it.
2215 ResourceMark rm;
2216 jvalue val;
2217 val.d = value;
2218 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2219 VMThread::execute(&op);
2220 return op.result();
2221 } /* end SetLocalDouble */
2222
2223
2224 //
2225 // Breakpoint functions
2226 //
2227
2228 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2229 jvmtiError
2230 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2231 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2232 if (location < 0) { // simple invalid location check first
2233 return JVMTI_ERROR_INVALID_LOCATION;
2234 }
2235 // verify that the breakpoint is not past the end of the method
2236 if (location >= (jlocation) method_oop->code_size()) {
2237 return JVMTI_ERROR_INVALID_LOCATION;
2238 }
2239
2240 ResourceMark rm;
2241 JvmtiBreakpoint bp(method_oop, location);
2242 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2243 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2244 return JVMTI_ERROR_DUPLICATE;
2245
2246 if (TraceJVMTICalls) {
2247 jvmti_breakpoints.print();
2248 }
2249
2250 return JVMTI_ERROR_NONE;
2251 } /* end SetBreakpoint */
2252
2253
2254 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2255 jvmtiError
2256 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2257 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2258
2259 if (location < 0) { // simple invalid location check first
2260 return JVMTI_ERROR_INVALID_LOCATION;
2261 }
2262
2263 // verify that the breakpoint is not past the end of the method
2264 if (location >= (jlocation) method_oop->code_size()) {
2265 return JVMTI_ERROR_INVALID_LOCATION;
2266 }
2267
2268 JvmtiBreakpoint bp(method_oop, location);
2269
2270 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2271 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2272 return JVMTI_ERROR_NOT_FOUND;
2273
2274 if (TraceJVMTICalls) {
2275 jvmti_breakpoints.print();
2276 }
2277
2278 return JVMTI_ERROR_NONE;
2279 } /* end ClearBreakpoint */
2280
2281
2282 //
2283 // Watched Field functions
2284 //
2285
2286 jvmtiError
2287 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2288 // make sure we haven't set this watch before
2289 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2290 fdesc_ptr->set_is_field_access_watched(true);
2291
2292 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2293
2294 return JVMTI_ERROR_NONE;
2295 } /* end SetFieldAccessWatch */
2296
2297
2298 jvmtiError
2299 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2300 // make sure we have a watch to clear
2301 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2302 fdesc_ptr->set_is_field_access_watched(false);
2303
2304 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2305
2306 return JVMTI_ERROR_NONE;
2307 } /* end ClearFieldAccessWatch */
2308
2309
2310 jvmtiError
2311 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2312 // make sure we haven't set this watch before
2313 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2314 fdesc_ptr->set_is_field_modification_watched(true);
2315
2316 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2317
2318 return JVMTI_ERROR_NONE;
2319 } /* end SetFieldModificationWatch */
2320
2321
2322 jvmtiError
2323 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2324 // make sure we have a watch to clear
2325 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2326 fdesc_ptr->set_is_field_modification_watched(false);
2327
2328 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2329
2330 return JVMTI_ERROR_NONE;
2331 } /* end ClearFieldModificationWatch */
2332
2333 //
2334 // Class functions
2335 //
2336
2337
2338 // k_mirror - may be primitive, this must be checked
2339 // signature_ptr - NULL is a valid value, must be checked
2340 // generic_ptr - NULL is a valid value, must be checked
2341 jvmtiError
2342 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2343 ResourceMark rm;
2344 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2345 Klass* k = NULL;
2346 if (!isPrimitive) {
2347 k = java_lang_Class::as_Klass(k_mirror);
2348 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2349 }
2350 if (signature_ptr != NULL) {
2351 char* result = NULL;
2352 if (isPrimitive) {
2353 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2354 result = (char*) jvmtiMalloc(2);
2355 result[0] = tchar;
2356 result[1] = '\0';
2357 } else {
2358 const char* class_sig = k->signature_name();
2359 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2360 strcpy(result, class_sig);
2361 }
2362 *signature_ptr = result;
2363 }
2364 if (generic_ptr != NULL) {
2365 *generic_ptr = NULL;
2366 if (!isPrimitive && k->is_instance_klass()) {
2367 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2368 if (soo != NULL) {
2369 const char *gen_sig = soo->as_C_string();
2370 if (gen_sig != NULL) {
2371 char* gen_result;
2372 jvmtiError err = allocate(strlen(gen_sig) + 1,
2373 (unsigned char **)&gen_result);
2374 if (err != JVMTI_ERROR_NONE) {
2375 return err;
2376 }
2377 strcpy(gen_result, gen_sig);
2378 *generic_ptr = gen_result;
2379 }
2380 }
2381 }
2382 }
2383 return JVMTI_ERROR_NONE;
2384 } /* end GetClassSignature */
2385
2386
2387 // k_mirror - may be primitive, this must be checked
2388 // status_ptr - pre-checked for NULL
2389 jvmtiError
2390 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2391 jint result = 0;
2392 if (java_lang_Class::is_primitive(k_mirror)) {
2393 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2394 } else {
2395 Klass* k = java_lang_Class::as_Klass(k_mirror);
2396 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2397 result = k->jvmti_class_status();
2398 }
2399 *status_ptr = result;
2400
2401 return JVMTI_ERROR_NONE;
2402 } /* end GetClassStatus */
2403
2404
2405 // k_mirror - may be primitive, this must be checked
2406 // source_name_ptr - pre-checked for NULL
2407 jvmtiError
2408 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2409 if (java_lang_Class::is_primitive(k_mirror)) {
2410 return JVMTI_ERROR_ABSENT_INFORMATION;
2411 }
2412 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2413 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2414
2415 if (!k_klass->is_instance_klass()) {
2416 return JVMTI_ERROR_ABSENT_INFORMATION;
2417 }
2418
2419 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2420 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2421 {
2422 JavaThread* current_thread = JavaThread::current();
2423 ResourceMark rm(current_thread);
2424 const char* sfncp = (const char*) sfnOop->as_C_string();
2425 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2426 strcpy(*source_name_ptr, sfncp);
2427 }
2428
2429 return JVMTI_ERROR_NONE;
2430 } /* end GetSourceFileName */
2431
2432
2433 // k_mirror - may be primitive, this must be checked
2434 // modifiers_ptr - pre-checked for NULL
2435 jvmtiError
2436 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2437 JavaThread* current_thread = JavaThread::current();
2438 jint result = 0;
2439 if (!java_lang_Class::is_primitive(k_mirror)) {
2440 Klass* k = java_lang_Class::as_Klass(k_mirror);
2441 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2442 result = k->compute_modifier_flags(current_thread);
2443 JavaThread* THREAD = current_thread; // pass to macros
2444 if (HAS_PENDING_EXCEPTION) {
2445 CLEAR_PENDING_EXCEPTION;
2446 return JVMTI_ERROR_INTERNAL;
2447 };
2448
2449 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2450 if(k->is_super()) {
2451 result |= JVM_ACC_SUPER;
2452 }
2453 } else {
2454 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2455 }
2456 *modifiers_ptr = result;
2457
2458 return JVMTI_ERROR_NONE;
2459 } /* end GetClassModifiers */
2460
2461
2462 // k_mirror - may be primitive, this must be checked
2463 // method_count_ptr - pre-checked for NULL
2464 // methods_ptr - pre-checked for NULL
2465 jvmtiError
2466 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2467 JavaThread* current_thread = JavaThread::current();
2468 HandleMark hm(current_thread);
2469
2470 if (java_lang_Class::is_primitive(k_mirror)) {
2471 *method_count_ptr = 0;
2472 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2473 return JVMTI_ERROR_NONE;
2474 }
2475 Klass* k = java_lang_Class::as_Klass(k_mirror);
2476 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2477
2478 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2479 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2480 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2481 }
2482
2483 if (!k->is_instance_klass()) {
2484 *method_count_ptr = 0;
2485 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2486 return JVMTI_ERROR_NONE;
2487 }
2488 InstanceKlass* ik = InstanceKlass::cast(k);
2489 // Allocate the result and fill it in
2490 int result_length = ik->methods()->length();
2491 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2492 int index;
2493 bool jmethodids_found = true;
2494
2495 if (JvmtiExport::can_maintain_original_method_order()) {
2496 // Use the original method ordering indices stored in the class, so we can emit
2497 // jmethodIDs in the order they appeared in the class file
2498 for (index = 0; index < result_length; index++) {
2499 Method* m = ik->methods()->at(index);
2500 int original_index = ik->method_ordering()->at(index);
2501 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2502 jmethodID id;
2503 if (jmethodids_found) {
2504 id = m->find_jmethod_id_or_null();
2505 if (id == NULL) {
2506 // If we find an uninitialized value, make sure there is
2507 // enough space for all the uninitialized values we might
2508 // find.
2509 ik->ensure_space_for_methodids(index);
2510 jmethodids_found = false;
2511 id = m->jmethod_id();
2512 }
2513 } else {
2514 id = m->jmethod_id();
2515 }
2516 result_list[original_index] = id;
2517 }
2518 } else {
2519 // otherwise just copy in any order
2520 for (index = 0; index < result_length; index++) {
2521 Method* m = ik->methods()->at(index);
2522 jmethodID id;
2523 if (jmethodids_found) {
2524 id = m->find_jmethod_id_or_null();
2525 if (id == NULL) {
2526 // If we find an uninitialized value, make sure there is
2527 // enough space for all the uninitialized values we might
2528 // find.
2529 ik->ensure_space_for_methodids(index);
2530 jmethodids_found = false;
2531 id = m->jmethod_id();
2532 }
2533 } else {
2534 id = m->jmethod_id();
2535 }
2536 result_list[index] = id;
2537 }
2538 }
2539 // Fill in return value.
2540 *method_count_ptr = result_length;
2541 *methods_ptr = result_list;
2542
2543 return JVMTI_ERROR_NONE;
2544 } /* end GetClassMethods */
2545
2546
2547 // k_mirror - may be primitive, this must be checked
2548 // field_count_ptr - pre-checked for NULL
2549 // fields_ptr - pre-checked for NULL
2550 jvmtiError
2551 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2552 if (java_lang_Class::is_primitive(k_mirror)) {
2553 *field_count_ptr = 0;
2554 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2555 return JVMTI_ERROR_NONE;
2556 }
2557 JavaThread* current_thread = JavaThread::current();
2558 HandleMark hm(current_thread);
2559 Klass* k = java_lang_Class::as_Klass(k_mirror);
2560 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2561
2562 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2563 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2564 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2565 }
2566
2567 if (!k->is_instance_klass()) {
2568 *field_count_ptr = 0;
2569 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2570 return JVMTI_ERROR_NONE;
2571 }
2572
2573
2574 InstanceKlass* ik = InstanceKlass::cast(k);
2575
2576 int result_count = 0;
2577 // First, count the fields.
2578 FilteredFieldStream flds(ik, true, true);
2579 result_count = flds.field_count();
2580
2581 // Allocate the result and fill it in
2582 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2583 // The JVMTI spec requires fields in the order they occur in the class file,
2584 // this is the reverse order of what FieldStream hands out.
2585 int id_index = (result_count - 1);
2586
2587 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2588 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2589 ik, src_st.offset(),
2590 src_st.access_flags().is_static());
2591 }
2592 assert(id_index == -1, "just checking");
2593 // Fill in the results
2594 *field_count_ptr = result_count;
2595 *fields_ptr = result_list;
2596
2597 return JVMTI_ERROR_NONE;
2598 } /* end GetClassFields */
2599
2600
2601 // k_mirror - may be primitive, this must be checked
2602 // interface_count_ptr - pre-checked for NULL
2603 // interfaces_ptr - pre-checked for NULL
2604 jvmtiError
2605 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2606 {
2607 if (java_lang_Class::is_primitive(k_mirror)) {
2608 *interface_count_ptr = 0;
2609 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2610 return JVMTI_ERROR_NONE;
2611 }
2612 JavaThread* current_thread = JavaThread::current();
2613 HandleMark hm(current_thread);
2614 Klass* k = java_lang_Class::as_Klass(k_mirror);
2615 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2616
2617 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2618 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2619 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2620
2621 if (!k->is_instance_klass()) {
2622 *interface_count_ptr = 0;
2623 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2624 return JVMTI_ERROR_NONE;
2625 }
2626
2627 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2628 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2629 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2630 for (int i_index = 0; i_index < result_length; i_index += 1) {
2631 InstanceKlass* klass_at = interface_list->at(i_index);
2632 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2633 assert(klass_at->is_interface(), "interfaces must be interfaces");
2634 oop mirror_at = klass_at->java_mirror();
2635 Handle handle_at = Handle(current_thread, mirror_at);
2636 result_list[i_index] = (jclass) jni_reference(handle_at);
2637 }
2638 *interface_count_ptr = result_length;
2639 *interfaces_ptr = result_list;
2640 }
2641
2642 return JVMTI_ERROR_NONE;
2643 } /* end GetImplementedInterfaces */
2644
2645
2646 // k_mirror - may be primitive, this must be checked
2647 // minor_version_ptr - pre-checked for NULL
2648 // major_version_ptr - pre-checked for NULL
2649 jvmtiError
2650 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2651 if (java_lang_Class::is_primitive(k_mirror)) {
2652 return JVMTI_ERROR_ABSENT_INFORMATION;
2653 }
2654 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2655
2656 jint status = klass->jvmti_class_status();
2657 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2658 return JVMTI_ERROR_INVALID_CLASS;
2659 }
2660 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2661 return JVMTI_ERROR_ABSENT_INFORMATION;
2662 }
2663
2664 InstanceKlass* ik = InstanceKlass::cast(klass);
2665 *minor_version_ptr = ik->minor_version();
2666 *major_version_ptr = ik->major_version();
2667
2668 return JVMTI_ERROR_NONE;
2669 } /* end GetClassVersionNumbers */
2670
2671
2672 // k_mirror - may be primitive, this must be checked
2673 // constant_pool_count_ptr - pre-checked for NULL
2674 // constant_pool_byte_count_ptr - pre-checked for NULL
2675 // constant_pool_bytes_ptr - pre-checked for NULL
2676 jvmtiError
2677 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2678 if (java_lang_Class::is_primitive(k_mirror)) {
2679 return JVMTI_ERROR_ABSENT_INFORMATION;
2680 }
2681
2682 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2683 Thread *thread = Thread::current();
2684 ResourceMark rm(thread);
2685
2686 jint status = klass->jvmti_class_status();
2687 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2688 return JVMTI_ERROR_INVALID_CLASS;
2689 }
2690 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2691 return JVMTI_ERROR_ABSENT_INFORMATION;
2692 }
2693
2694 InstanceKlass* ik = InstanceKlass::cast(klass);
2695 JvmtiConstantPoolReconstituter reconstituter(ik);
2696 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2697 return reconstituter.get_error();
2698 }
2699
2700 unsigned char *cpool_bytes;
2701 int cpool_size = reconstituter.cpool_size();
2702 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2703 return reconstituter.get_error();
2704 }
2705 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2706 if (res != JVMTI_ERROR_NONE) {
2707 return res;
2708 }
2709 reconstituter.copy_cpool_bytes(cpool_bytes);
2710 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2711 return reconstituter.get_error();
2712 }
2713
2714 constantPoolHandle constants(thread, ik->constants());
2715 *constant_pool_count_ptr = constants->length();
2716 *constant_pool_byte_count_ptr = cpool_size;
2717 *constant_pool_bytes_ptr = cpool_bytes;
2718
2719 return JVMTI_ERROR_NONE;
2720 } /* end GetConstantPool */
2721
2722
2723 // k_mirror - may be primitive, this must be checked
2724 // is_interface_ptr - pre-checked for NULL
2725 jvmtiError
2726 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2727 {
2728 bool result = false;
2729 if (!java_lang_Class::is_primitive(k_mirror)) {
2730 Klass* k = java_lang_Class::as_Klass(k_mirror);
2731 if (k != NULL && k->is_interface()) {
2732 result = true;
2733 }
2734 }
2735 *is_interface_ptr = result;
2736 }
2737
2738 return JVMTI_ERROR_NONE;
2739 } /* end IsInterface */
2740
2741
2742 // k_mirror - may be primitive, this must be checked
2743 // is_array_class_ptr - pre-checked for NULL
2744 jvmtiError
2745 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2746 {
2747 bool result = false;
2748 if (!java_lang_Class::is_primitive(k_mirror)) {
2749 Klass* k = java_lang_Class::as_Klass(k_mirror);
2750 if (k != NULL && k->is_array_klass()) {
2751 result = true;
2752 }
2753 }
2754 *is_array_class_ptr = result;
2755 }
2756
2757 return JVMTI_ERROR_NONE;
2758 } /* end IsArrayClass */
2759
2760
2761 // k_mirror - may be primitive, this must be checked
2762 // classloader_ptr - pre-checked for NULL
2763 jvmtiError
2764 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2765 {
2766 if (java_lang_Class::is_primitive(k_mirror)) {
2767 *classloader_ptr = (jclass) jni_reference(Handle());
2768 return JVMTI_ERROR_NONE;
2769 }
2770 JavaThread* current_thread = JavaThread::current();
2771 HandleMark hm(current_thread);
2772 Klass* k = java_lang_Class::as_Klass(k_mirror);
2773 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2774
2775 oop result_oop = k->class_loader();
2776 if (result_oop == NULL) {
2777 *classloader_ptr = (jclass) jni_reference(Handle());
2778 return JVMTI_ERROR_NONE;
2779 }
2780 Handle result_handle = Handle(current_thread, result_oop);
2781 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2782 *classloader_ptr = result_jnihandle;
2783 }
2784 return JVMTI_ERROR_NONE;
2785 } /* end GetClassLoader */
2786
2787
2788 // k_mirror - may be primitive, this must be checked
2789 // source_debug_extension_ptr - pre-checked for NULL
2790 jvmtiError
2791 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2792 {
2793 if (java_lang_Class::is_primitive(k_mirror)) {
2794 return JVMTI_ERROR_ABSENT_INFORMATION;
2795 }
2796 Klass* k = java_lang_Class::as_Klass(k_mirror);
2797 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2798 if (!k->is_instance_klass()) {
2799 return JVMTI_ERROR_ABSENT_INFORMATION;
2800 }
2801 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2802 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2803
2804 {
2805 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2806 strcpy(*source_debug_extension_ptr, sde);
2807 }
2808 }
2809
2810 return JVMTI_ERROR_NONE;
2811 } /* end GetSourceDebugExtension */
2812
2813 //
2814 // Object functions
2815 //
2816
2817 // hash_code_ptr - pre-checked for NULL
2818 jvmtiError
2819 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2820 oop mirror = JNIHandles::resolve_external_guard(object);
2821 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2822 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2823
2824 {
2825 jint result = (jint) mirror->identity_hash();
2826 *hash_code_ptr = result;
2827 }
2828 return JVMTI_ERROR_NONE;
2829 } /* end GetObjectHashCode */
2830
2831
2832 // info_ptr - pre-checked for NULL
2833 jvmtiError
2834 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2835 JavaThread* calling_thread = JavaThread::current();
2836 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2837 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2838 // Some of the critical threads were not suspended. go to a safepoint and try again
2839 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2840 VMThread::execute(&op);
2841 err = op.result();
2842 }
2843 return err;
2844 } /* end GetObjectMonitorUsage */
2845
2846
2847 //
2848 // Field functions
2849 //
2850
2851 // name_ptr - NULL is a valid value, must be checked
2852 // signature_ptr - NULL is a valid value, must be checked
2853 // generic_ptr - NULL is a valid value, must be checked
2854 jvmtiError
2855 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2856 JavaThread* current_thread = JavaThread::current();
2857 ResourceMark rm(current_thread);
2858 if (name_ptr == NULL) {
2859 // just don't return the name
2860 } else {
2861 const char* fieldName = fdesc_ptr->name()->as_C_string();
2862 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2863 if (*name_ptr == NULL)
2864 return JVMTI_ERROR_OUT_OF_MEMORY;
2865 strcpy(*name_ptr, fieldName);
2866 }
2867 if (signature_ptr== NULL) {
2868 // just don't return the signature
2869 } else {
2870 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2871 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2872 if (*signature_ptr == NULL)
2873 return JVMTI_ERROR_OUT_OF_MEMORY;
2874 strcpy(*signature_ptr, fieldSignature);
2875 }
2876 if (generic_ptr != NULL) {
2877 *generic_ptr = NULL;
2878 Symbol* soop = fdesc_ptr->generic_signature();
2879 if (soop != NULL) {
2880 const char* gen_sig = soop->as_C_string();
2881 if (gen_sig != NULL) {
2882 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2883 if (err != JVMTI_ERROR_NONE) {
2884 return err;
2885 }
2886 strcpy(*generic_ptr, gen_sig);
2887 }
2888 }
2889 }
2890 return JVMTI_ERROR_NONE;
2891 } /* end GetFieldName */
2892
2893
2894 // declaring_class_ptr - pre-checked for NULL
2895 jvmtiError
2896 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2897
2898 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2899 return JVMTI_ERROR_NONE;
2900 } /* end GetFieldDeclaringClass */
2901
2902
2903 // modifiers_ptr - pre-checked for NULL
2904 jvmtiError
2905 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2906
2907 AccessFlags resultFlags = fdesc_ptr->access_flags();
2908 jint result = resultFlags.as_int();
2909 *modifiers_ptr = result;
2910
2911 return JVMTI_ERROR_NONE;
2912 } /* end GetFieldModifiers */
2913
2914
2915 // is_synthetic_ptr - pre-checked for NULL
2916 jvmtiError
2917 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2918 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2919 return JVMTI_ERROR_NONE;
2920 } /* end IsFieldSynthetic */
2921
2922
2923 //
2924 // Method functions
2925 //
2926
2927 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2928 // name_ptr - NULL is a valid value, must be checked
2929 // signature_ptr - NULL is a valid value, must be checked
2930 // generic_ptr - NULL is a valid value, must be checked
2931 jvmtiError
2932 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2933 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2934 JavaThread* current_thread = JavaThread::current();
2935
2936 ResourceMark rm(current_thread); // get the utf8 name and signature
2937 if (name_ptr == NULL) {
2938 // just don't return the name
2939 } else {
2940 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2941 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2942 strcpy(*name_ptr, utf8_name);
2943 }
2944 if (signature_ptr == NULL) {
2945 // just don't return the signature
2946 } else {
2947 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2948 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2949 strcpy(*signature_ptr, utf8_signature);
2950 }
2951
2952 if (generic_ptr != NULL) {
2953 *generic_ptr = NULL;
2954 Symbol* soop = method_oop->generic_signature();
2955 if (soop != NULL) {
2956 const char* gen_sig = soop->as_C_string();
2957 if (gen_sig != NULL) {
2958 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2959 if (err != JVMTI_ERROR_NONE) {
2960 return err;
2961 }
2962 strcpy(*generic_ptr, gen_sig);
2963 }
2964 }
2965 }
2966 return JVMTI_ERROR_NONE;
2967 } /* end GetMethodName */
2968
2969
2970 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2971 // declaring_class_ptr - pre-checked for NULL
2972 jvmtiError
2973 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2974 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2975 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2976 return JVMTI_ERROR_NONE;
2977 } /* end GetMethodDeclaringClass */
2978
2979
2980 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2981 // modifiers_ptr - pre-checked for NULL
2982 jvmtiError
2983 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2984 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2985 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2986 return JVMTI_ERROR_NONE;
2987 } /* end GetMethodModifiers */
2988
2989
2990 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2991 // max_ptr - pre-checked for NULL
2992 jvmtiError
2993 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2994 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2995 // get max stack
2996 (*max_ptr) = method_oop->max_locals();
2997 return JVMTI_ERROR_NONE;
2998 } /* end GetMaxLocals */
2999
3000
3001 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3002 // size_ptr - pre-checked for NULL
3003 jvmtiError
3004 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3005 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3006 // get size of arguments
3007
3008 (*size_ptr) = method_oop->size_of_parameters();
3009 return JVMTI_ERROR_NONE;
3010 } /* end GetArgumentsSize */
3011
3012
3013 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3014 // entry_count_ptr - pre-checked for NULL
3015 // table_ptr - pre-checked for NULL
3016 jvmtiError
3017 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3018 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3019 if (!method_oop->has_linenumber_table()) {
3020 return (JVMTI_ERROR_ABSENT_INFORMATION);
3021 }
3022
3023 // The line number table is compressed so we don't know how big it is until decompressed.
3024 // Decompression is really fast so we just do it twice.
3025
3026 // Compute size of table
3027 jint num_entries = 0;
3028 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3029 while (stream.read_pair()) {
3030 num_entries++;
3031 }
3032 jvmtiLineNumberEntry *jvmti_table =
3033 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3034
3035 // Fill jvmti table
3036 if (num_entries > 0) {
3037 int index = 0;
3038 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3039 while (stream.read_pair()) {
3040 jvmti_table[index].start_location = (jlocation) stream.bci();
3041 jvmti_table[index].line_number = (jint) stream.line();
3042 index++;
3043 }
3044 assert(index == num_entries, "sanity check");
3045 }
3046
3047 // Set up results
3048 (*entry_count_ptr) = num_entries;
3049 (*table_ptr) = jvmti_table;
3050
3051 return JVMTI_ERROR_NONE;
3052 } /* end GetLineNumberTable */
3053
3054
3055 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3056 // start_location_ptr - pre-checked for NULL
3057 // end_location_ptr - pre-checked for NULL
3058 jvmtiError
3059 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3060
3061 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3062 // get start and end location
3063 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3064 if (method_oop->code_size() == 0) {
3065 // there is no code so there is no start location
3066 (*start_location_ptr) = (jlocation)(-1);
3067 } else {
3068 (*start_location_ptr) = (jlocation)(0);
3069 }
3070
3071 return JVMTI_ERROR_NONE;
3072 } /* end GetMethodLocation */
3073
3074
3075 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3076 // entry_count_ptr - pre-checked for NULL
3077 // table_ptr - pre-checked for NULL
3078 jvmtiError
3079 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3080
3081 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3082 JavaThread* current_thread = JavaThread::current();
3083
3084 // does the klass have any local variable information?
3085 InstanceKlass* ik = method_oop->method_holder();
3086 if (!ik->access_flags().has_localvariable_table()) {
3087 return (JVMTI_ERROR_ABSENT_INFORMATION);
3088 }
3089
3090 ConstantPool* constants = method_oop->constants();
3091 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3092
3093 // in the vm localvariable table representation, 6 consecutive elements in the table
3094 // represent a 6-tuple of shorts
3095 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3096 jint num_entries = method_oop->localvariable_table_length();
3097 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3098 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3099
3100 if (num_entries > 0) {
3101 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3102 for (int i = 0; i < num_entries; i++) {
3103 // get the 5 tuple information from the vm table
3104 jlocation start_location = (jlocation) table[i].start_bci;
3105 jint length = (jint) table[i].length;
3106 int name_index = (int) table[i].name_cp_index;
3107 int signature_index = (int) table[i].descriptor_cp_index;
3108 int generic_signature_index = (int) table[i].signature_cp_index;
3109 jint slot = (jint) table[i].slot;
3110
3111 // get utf8 name and signature
3112 char *name_buf = NULL;
3113 char *sig_buf = NULL;
3114 char *gen_sig_buf = NULL;
3115 {
3116 ResourceMark rm(current_thread);
3117
3118 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3119 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3120 strcpy(name_buf, utf8_name);
3121
3122 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3123 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3124 strcpy(sig_buf, utf8_signature);
3125
3126 if (generic_signature_index > 0) {
3127 const char *utf8_gen_sign = (const char *)
3128 constants->symbol_at(generic_signature_index)->as_utf8();
3129 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3130 strcpy(gen_sig_buf, utf8_gen_sign);
3131 }
3132 }
3133
3134 // fill in the jvmti local variable table
3135 jvmti_table[i].start_location = start_location;
3136 jvmti_table[i].length = length;
3137 jvmti_table[i].name = name_buf;
3138 jvmti_table[i].signature = sig_buf;
3139 jvmti_table[i].generic_signature = gen_sig_buf;
3140 jvmti_table[i].slot = slot;
3141 }
3142 }
3143
3144 // set results
3145 (*entry_count_ptr) = num_entries;
3146 (*table_ptr) = jvmti_table;
3147
3148 return JVMTI_ERROR_NONE;
3149 } /* end GetLocalVariableTable */
3150
3151
3152 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3153 // bytecode_count_ptr - pre-checked for NULL
3154 // bytecodes_ptr - pre-checked for NULL
3155 jvmtiError
3156 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3157 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3158
3159 HandleMark hm;
3160 methodHandle method(method_oop);
3161 jint size = (jint)method->code_size();
3162 jvmtiError err = allocate(size, bytecodes_ptr);
3163 if (err != JVMTI_ERROR_NONE) {
3164 return err;
3165 }
3166
3167 (*bytecode_count_ptr) = size;
3168 // get byte codes
3169 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3170
3171 return JVMTI_ERROR_NONE;
3172 } /* end GetBytecodes */
3173
3174
3175 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3176 // is_native_ptr - pre-checked for NULL
3177 jvmtiError
3178 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3179 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3180 (*is_native_ptr) = method_oop->is_native();
3181 return JVMTI_ERROR_NONE;
3182 } /* end IsMethodNative */
3183
3184
3185 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3186 // is_synthetic_ptr - pre-checked for NULL
3187 jvmtiError
3188 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3189 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3190 (*is_synthetic_ptr) = method_oop->is_synthetic();
3191 return JVMTI_ERROR_NONE;
3192 } /* end IsMethodSynthetic */
3193
3194
3195 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3196 // is_obsolete_ptr - pre-checked for NULL
3197 jvmtiError
3198 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3199 if (use_version_1_0_semantics() &&
3200 get_capabilities()->can_redefine_classes == 0) {
3201 // This JvmtiEnv requested version 1.0 semantics and this function
3202 // requires the can_redefine_classes capability in version 1.0 so
3203 // we need to return an error here.
3204 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3205 }
3206
3207 if (method_oop == NULL || method_oop->is_obsolete()) {
3208 *is_obsolete_ptr = true;
3209 } else {
3210 *is_obsolete_ptr = false;
3211 }
3212 return JVMTI_ERROR_NONE;
3213 } /* end IsMethodObsolete */
3214
3215 //
3216 // Raw Monitor functions
3217 //
3218
3219 // name - pre-checked for NULL
3220 // monitor_ptr - pre-checked for NULL
3221 jvmtiError
3222 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3223 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3224 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3225
3226 *monitor_ptr = (jrawMonitorID)rmonitor;
3227
3228 return JVMTI_ERROR_NONE;
3229 } /* end CreateRawMonitor */
3230
3231
3232 // rmonitor - pre-checked for validity
3233 jvmtiError
3234 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3235 if (Threads::number_of_threads() == 0) {
3236 // Remove this monitor from pending raw monitors list
3237 // if it has entered in onload or start phase.
3238 JvmtiPendingMonitors::destroy(rmonitor);
3239 } else {
3240 Thread* thread = Thread::current();
3241 if (rmonitor->is_entered(thread)) {
3242 // The caller owns this monitor which we are about to destroy.
3243 // We exit the underlying synchronization object so that the
3244 // "delete monitor" call below can work without an assertion
3245 // failure on systems that don't like destroying synchronization
3246 // objects that are locked.
3247 int r;
3248 intptr_t recursion = rmonitor->recursions();
3249 for (intptr_t i=0; i <= recursion; i++) {
3250 r = rmonitor->raw_exit(thread);
3251 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3252 if (r != ObjectMonitor::OM_OK) { // robustness
3253 return JVMTI_ERROR_INTERNAL;
3254 }
3255 }
3256 }
3257 if (rmonitor->owner() != NULL) {
3258 // The caller is trying to destroy a monitor that is locked by
3259 // someone else. While this is not forbidden by the JVMTI
3260 // spec, it will cause an assertion failure on systems that don't
3261 // like destroying synchronization objects that are locked.
3262 // We indicate a problem with the error return (and leak the
3263 // monitor's memory).
3264 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3265 }
3266 }
3267
3268 delete rmonitor;
3269
3270 return JVMTI_ERROR_NONE;
3271 } /* end DestroyRawMonitor */
3272
3273
3274 // rmonitor - pre-checked for validity
3275 jvmtiError
3276 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3277 if (Threads::number_of_threads() == 0) {
3278 // No JavaThreads exist so ObjectMonitor enter cannot be
3279 // used, add this raw monitor to the pending list.
3280 // The pending monitors will be actually entered when
3281 // the VM is setup.
3282 // See transition_pending_raw_monitors in create_vm()
3283 // in thread.cpp.
3284 JvmtiPendingMonitors::enter(rmonitor);
3285 } else {
3286 int r = 0;
3287 Thread* thread = Thread::current();
3288
3289 if (thread->is_Java_thread()) {
3290 JavaThread* current_thread = (JavaThread*)thread;
3291
3292 #ifdef PROPER_TRANSITIONS
3293 // Not really unknown but ThreadInVMfromNative does more than we want
3294 ThreadInVMfromUnknown __tiv;
3295 {
3296 ThreadBlockInVM __tbivm(current_thread);
3297 r = rmonitor->raw_enter(current_thread);
3298 }
3299 #else
3300 /* Transition to thread_blocked without entering vm state */
3301 /* This is really evil. Normally you can't undo _thread_blocked */
3302 /* transitions like this because it would cause us to miss a */
3303 /* safepoint but since the thread was already in _thread_in_native */
3304 /* the thread is not leaving a safepoint safe state and it will */
3305 /* block when it tries to return from native. We can't safepoint */
3306 /* block in here because we could deadlock the vmthread. Blech. */
3307
3308 JavaThreadState state = current_thread->thread_state();
3309 assert(state == _thread_in_native, "Must be _thread_in_native");
3310 // frame should already be walkable since we are in native
3311 assert(!current_thread->has_last_Java_frame() ||
3312 current_thread->frame_anchor()->walkable(), "Must be walkable");
3313 current_thread->set_thread_state(_thread_blocked);
3314
3315 r = rmonitor->raw_enter(current_thread);
3316 // restore state, still at a safepoint safe state
3317 current_thread->set_thread_state(state);
3318
3319 #endif /* PROPER_TRANSITIONS */
3320 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3321 } else {
3322 if (thread->is_Named_thread()) {
3323 r = rmonitor->raw_enter(thread);
3324 } else {
3325 ShouldNotReachHere();
3326 }
3327 }
3328
3329 if (r != ObjectMonitor::OM_OK) { // robustness
3330 return JVMTI_ERROR_INTERNAL;
3331 }
3332 }
3333 return JVMTI_ERROR_NONE;
3334 } /* end RawMonitorEnter */
3335
3336
3337 // rmonitor - pre-checked for validity
3338 jvmtiError
3339 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3340 jvmtiError err = JVMTI_ERROR_NONE;
3341
3342 if (Threads::number_of_threads() == 0) {
3343 // No JavaThreads exist so just remove this monitor from the pending list.
3344 // Bool value from exit is false if rmonitor is not in the list.
3345 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3346 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3347 }
3348 } else {
3349 int r = 0;
3350 Thread* thread = Thread::current();
3351
3352 if (thread->is_Java_thread()) {
3353 JavaThread* current_thread = (JavaThread*)thread;
3354 #ifdef PROPER_TRANSITIONS
3355 // Not really unknown but ThreadInVMfromNative does more than we want
3356 ThreadInVMfromUnknown __tiv;
3357 #endif /* PROPER_TRANSITIONS */
3358 r = rmonitor->raw_exit(current_thread);
3359 } else {
3360 if (thread->is_Named_thread()) {
3361 r = rmonitor->raw_exit(thread);
3362 } else {
3363 ShouldNotReachHere();
3364 }
3365 }
3366
3367 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3368 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3369 } else {
3370 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3371 if (r != ObjectMonitor::OM_OK) { // robustness
3372 err = JVMTI_ERROR_INTERNAL;
3373 }
3374 }
3375 }
3376 return err;
3377 } /* end RawMonitorExit */
3378
3379
3380 // rmonitor - pre-checked for validity
3381 jvmtiError
3382 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3383 int r = 0;
3384 Thread* thread = Thread::current();
3385
3386 if (thread->is_Java_thread()) {
3387 JavaThread* current_thread = (JavaThread*)thread;
3388 #ifdef PROPER_TRANSITIONS
3389 // Not really unknown but ThreadInVMfromNative does more than we want
3390 ThreadInVMfromUnknown __tiv;
3391 {
3392 ThreadBlockInVM __tbivm(current_thread);
3393 r = rmonitor->raw_wait(millis, true, current_thread);
3394 }
3395 #else
3396 /* Transition to thread_blocked without entering vm state */
3397 /* This is really evil. Normally you can't undo _thread_blocked */
3398 /* transitions like this because it would cause us to miss a */
3399 /* safepoint but since the thread was already in _thread_in_native */
3400 /* the thread is not leaving a safepoint safe state and it will */
3401 /* block when it tries to return from native. We can't safepoint */
3402 /* block in here because we could deadlock the vmthread. Blech. */
3403
3404 JavaThreadState state = current_thread->thread_state();
3405 assert(state == _thread_in_native, "Must be _thread_in_native");
3406 // frame should already be walkable since we are in native
3407 assert(!current_thread->has_last_Java_frame() ||
3408 current_thread->frame_anchor()->walkable(), "Must be walkable");
3409 current_thread->set_thread_state(_thread_blocked);
3410
3411 r = rmonitor->raw_wait(millis, true, current_thread);
3412 // restore state, still at a safepoint safe state
3413 current_thread->set_thread_state(state);
3414
3415 #endif /* PROPER_TRANSITIONS */
3416 } else {
3417 if (thread->is_Named_thread()) {
3418 r = rmonitor->raw_wait(millis, true, thread);
3419 } else {
3420 ShouldNotReachHere();
3421 }
3422 }
3423
3424 switch (r) {
3425 case ObjectMonitor::OM_INTERRUPTED:
3426 return JVMTI_ERROR_INTERRUPT;
3427 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3428 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3429 }
3430 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3431 if (r != ObjectMonitor::OM_OK) { // robustness
3432 return JVMTI_ERROR_INTERNAL;
3433 }
3434
3435 return JVMTI_ERROR_NONE;
3436 } /* end RawMonitorWait */
3437
3438
3439 // rmonitor - pre-checked for validity
3440 jvmtiError
3441 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3442 int r = 0;
3443 Thread* thread = Thread::current();
3444
3445 if (thread->is_Java_thread()) {
3446 JavaThread* current_thread = (JavaThread*)thread;
3447 // Not really unknown but ThreadInVMfromNative does more than we want
3448 ThreadInVMfromUnknown __tiv;
3449 r = rmonitor->raw_notify(current_thread);
3450 } else {
3451 if (thread->is_Named_thread()) {
3452 r = rmonitor->raw_notify(thread);
3453 } else {
3454 ShouldNotReachHere();
3455 }
3456 }
3457
3458 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3459 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3460 }
3461 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3462 if (r != ObjectMonitor::OM_OK) { // robustness
3463 return JVMTI_ERROR_INTERNAL;
3464 }
3465
3466 return JVMTI_ERROR_NONE;
3467 } /* end RawMonitorNotify */
3468
3469
3470 // rmonitor - pre-checked for validity
3471 jvmtiError
3472 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3473 int r = 0;
3474 Thread* thread = Thread::current();
3475
3476 if (thread->is_Java_thread()) {
3477 JavaThread* current_thread = (JavaThread*)thread;
3478 ThreadInVMfromUnknown __tiv;
3479 r = rmonitor->raw_notifyAll(current_thread);
3480 } else {
3481 if (thread->is_Named_thread()) {
3482 r = rmonitor->raw_notifyAll(thread);
3483 } else {
3484 ShouldNotReachHere();
3485 }
3486 }
3487
3488 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3489 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3490 }
3491 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3492 if (r != ObjectMonitor::OM_OK) { // robustness
3493 return JVMTI_ERROR_INTERNAL;
3494 }
3495
3496 return JVMTI_ERROR_NONE;
3497 } /* end RawMonitorNotifyAll */
3498
3499
3500 //
3501 // JNI Function Interception functions
3502 //
3503
3504
3505 // function_table - pre-checked for NULL
3506 jvmtiError
3507 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3508 // Copy jni function table at safepoint.
3509 VM_JNIFunctionTableCopier copier(function_table);
3510 VMThread::execute(&copier);
3511
3512 return JVMTI_ERROR_NONE;
3513 } /* end SetJNIFunctionTable */
3514
3515
3516 // function_table - pre-checked for NULL
3517 jvmtiError
3518 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3519 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3520 if (*function_table == NULL)
3521 return JVMTI_ERROR_OUT_OF_MEMORY;
3522 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3523 return JVMTI_ERROR_NONE;
3524 } /* end GetJNIFunctionTable */
3525
3526
3527 //
3528 // Event Management functions
3529 //
3530
3531 jvmtiError
3532 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3533 // can only generate two event types
3534 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3535 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3536 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3537 }
3538
3539 // for compiled_method_load events we must check that the environment
3540 // has the can_generate_compiled_method_load_events capability.
3541 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3542 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3543 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3544 }
3545 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3546 } else {
3547 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3548 }
3549
3550 } /* end GenerateEvents */
3551
3552
3553 //
3554 // Extension Mechanism functions
3555 //
3556
3557 // extension_count_ptr - pre-checked for NULL
3558 // extensions - pre-checked for NULL
3559 jvmtiError
3560 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3561 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3562 } /* end GetExtensionFunctions */
3563
3564
3565 // extension_count_ptr - pre-checked for NULL
3566 // extensions - pre-checked for NULL
3567 jvmtiError
3568 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3569 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3570 } /* end GetExtensionEvents */
3571
3572
3573 // callback - NULL is a valid value, must be checked
3574 jvmtiError
3575 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3576 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3577 } /* end SetExtensionEventCallback */
3578
3579 //
3580 // Timers functions
3581 //
3582
3583 // info_ptr - pre-checked for NULL
3584 jvmtiError
3585 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3586 os::current_thread_cpu_time_info(info_ptr);
3587 return JVMTI_ERROR_NONE;
3588 } /* end GetCurrentThreadCpuTimerInfo */
3589
3590
3591 // nanos_ptr - pre-checked for NULL
3592 jvmtiError
3593 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3594 *nanos_ptr = os::current_thread_cpu_time();
3595 return JVMTI_ERROR_NONE;
3596 } /* end GetCurrentThreadCpuTime */
3597
3598
3599 // info_ptr - pre-checked for NULL
3600 jvmtiError
3601 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3602 os::thread_cpu_time_info(info_ptr);
3603 return JVMTI_ERROR_NONE;
3604 } /* end GetThreadCpuTimerInfo */
3605
3606
3607 // Threads_lock NOT held, java_thread not protected by lock
3608 // java_thread - pre-checked
3609 // nanos_ptr - pre-checked for NULL
3610 jvmtiError
3611 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3612 *nanos_ptr = os::thread_cpu_time(java_thread);
3613 return JVMTI_ERROR_NONE;
3614 } /* end GetThreadCpuTime */
3615
3616
3617 // info_ptr - pre-checked for NULL
3618 jvmtiError
3619 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3620 os::javaTimeNanos_info(info_ptr);
3621 return JVMTI_ERROR_NONE;
3622 } /* end GetTimerInfo */
3623
3624
3625 // nanos_ptr - pre-checked for NULL
3626 jvmtiError
3627 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3628 *nanos_ptr = os::javaTimeNanos();
3629 return JVMTI_ERROR_NONE;
3630 } /* end GetTime */
3631
3632
3633 // processor_count_ptr - pre-checked for NULL
3634 jvmtiError
3635 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3636 *processor_count_ptr = os::active_processor_count();
3637 return JVMTI_ERROR_NONE;
3638 } /* end GetAvailableProcessors */
3639
3640 jvmtiError
3641 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3642 if (sampling_interval < 0) {
3643 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3644 }
3645 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3646 return JVMTI_ERROR_NONE;
3647 } /* end SetHeapSamplingInterval */
3648
3649 //
3650 // System Properties functions
3651 //
3652
3653 // count_ptr - pre-checked for NULL
3654 // property_ptr - pre-checked for NULL
3655 jvmtiError
3656 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3657 jvmtiError err = JVMTI_ERROR_NONE;
3658
3659 // Get the number of readable properties.
3660 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3661
3662 // Allocate memory to hold the exact number of readable properties.
3663 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3664 if (err != JVMTI_ERROR_NONE) {
3665 return err;
3666 }
3667 int readable_count = 0;
3668 // Loop through the system properties until all the readable properties are found.
3669 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3670 if (p->is_readable()) {
3671 const char *key = p->key();
3672 char **tmp_value = *property_ptr+readable_count;
3673 readable_count++;
3674 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3675 if (err == JVMTI_ERROR_NONE) {
3676 strcpy(*tmp_value, key);
3677 } else {
3678 // clean up previously allocated memory.
3679 for (int j=0; j<readable_count; j++) {
3680 Deallocate((unsigned char*)*property_ptr+j);
3681 }
3682 Deallocate((unsigned char*)property_ptr);
3683 break;
3684 }
3685 }
3686 }
3687 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3688 return err;
3689 } /* end GetSystemProperties */
3690
3691
3692 // property - pre-checked for NULL
3693 // value_ptr - pre-checked for NULL
3694 jvmtiError
3695 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3696 jvmtiError err = JVMTI_ERROR_NONE;
3697 const char *value;
3698
3699 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3700 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3701 if (value == NULL) {
3702 err = JVMTI_ERROR_NOT_AVAILABLE;
3703 } else {
3704 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3705 if (err == JVMTI_ERROR_NONE) {
3706 strcpy(*value_ptr, value);
3707 }
3708 }
3709 return err;
3710 } /* end GetSystemProperty */
3711
3712
3713 // property - pre-checked for NULL
3714 // value - NULL is a valid value, must be checked
3715 jvmtiError
3716 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3717 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3718
3719 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3720 if (strcmp(property, p->key()) == 0) {
3721 if (p->set_writeable_value(value_ptr)) {
3722 err = JVMTI_ERROR_NONE;
3723 }
3724 }
3725 }
3726 return err;
3727 } /* end SetSystemProperty */
--- EOF ---