1 /*
2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/modules.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "interpreter/bytecodeStream.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvmtifiles/jvmtiEnv.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.inline.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jniCheck.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "prims/jvmtiAgentThread.hpp"
45 #include "prims/jvmtiClassFileReconstituter.hpp"
46 #include "prims/jvmtiCodeBlobEvents.hpp"
47 #include "prims/jvmtiExtensions.hpp"
48 #include "prims/jvmtiGetLoadedClasses.hpp"
49 #include "prims/jvmtiHeapTransition.hpp"
50 #include "prims/jvmtiImpl.hpp"
51 #include "prims/jvmtiManageCapabilities.hpp"
52 #include "prims/jvmtiRawMonitor.hpp"
53 #include "prims/jvmtiRedefineClasses.hpp"
54 #include "prims/jvmtiTagMap.hpp"
55 #include "prims/jvmtiThreadState.inline.hpp"
56 #include "prims/jvmtiUtil.hpp"
57 #include "runtime/arguments.hpp"
58 #include "runtime/deoptimization.hpp"
59 #include "runtime/interfaceSupport.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jfieldIDWorkaround.hpp"
62 #include "runtime/osThread.hpp"
63 #include "runtime/reflectionUtils.hpp"
64 #include "runtime/signature.hpp"
65 #include "runtime/thread.inline.hpp"
66 #include "runtime/timerTrace.hpp"
67 #include "runtime/vframe.hpp"
68 #include "runtime/vmThread.hpp"
69 #include "services/threadService.hpp"
70 #include "utilities/exceptions.hpp"
71 #include "utilities/preserveException.hpp"
72
73
74 #define FIXLATER 0 // REMOVE this when completed.
75
76 // FIXLATER: hook into JvmtiTrace
77 #define TraceJVMTICalls false
78
79 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
80 }
81
82 JvmtiEnv::~JvmtiEnv() {
83 }
84
85 JvmtiEnv*
86 JvmtiEnv::create_a_jvmti(jint version) {
87 return new JvmtiEnv(version);
88 }
89
90 // VM operation class to copy jni function table at safepoint.
91 // More than one java threads or jvmti agents may be reading/
92 // modifying jni function tables. To reduce the risk of bad
93 // interaction b/w these threads it is copied at safepoint.
94 class VM_JNIFunctionTableCopier : public VM_Operation {
95 private:
96 const struct JNINativeInterface_ *_function_table;
97 public:
98 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
99 _function_table = func_tbl;
100 };
101
102 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
103 void doit() {
104 copy_jni_function_table(_function_table);
105 };
106 };
107
108 //
109 // Do not change the "prefix" marker below, everything above it is copied
110 // unchanged into the filled stub, everything below is controlled by the
111 // stub filler (only method bodies are carried forward, and then only for
112 // functionality still in the spec).
113 //
114 // end file prefix
115
116 //
117 // Memory Management functions
118 //
119
120 // mem_ptr - pre-checked for NULL
121 jvmtiError
122 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
123 return allocate(size, mem_ptr);
124 } /* end Allocate */
125
126
127 // mem - NULL is a valid value, must be checked
128 jvmtiError
129 JvmtiEnv::Deallocate(unsigned char* mem) {
130 return deallocate(mem);
131 } /* end Deallocate */
132
133 // Threads_lock NOT held, java_thread not protected by lock
134 // java_thread - pre-checked
135 // data - NULL is a valid value, must be checked
136 jvmtiError
137 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
138 JvmtiThreadState* state = java_thread->jvmti_thread_state();
139 if (state == NULL) {
140 if (data == NULL) {
141 // leaving state unset same as data set to NULL
142 return JVMTI_ERROR_NONE;
143 }
144 // otherwise, create the state
145 state = JvmtiThreadState::state_for(java_thread);
146 if (state == NULL) {
147 return JVMTI_ERROR_THREAD_NOT_ALIVE;
148 }
149 }
150 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
151 return JVMTI_ERROR_NONE;
152 } /* end SetThreadLocalStorage */
153
154
155 // Threads_lock NOT held
156 // thread - NOT pre-checked
157 // data_ptr - pre-checked for NULL
158 jvmtiError
159 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
160 JavaThread* current_thread = JavaThread::current();
161 if (thread == NULL) {
162 JvmtiThreadState* state = current_thread->jvmti_thread_state();
163 *data_ptr = (state == NULL) ? NULL :
164 state->env_thread_state(this)->get_agent_thread_local_storage_data();
165 } else {
166
167 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
168 // the thread to _thread_in_vm. However, when the TLS for a thread
169 // other than the current thread is required we need to transition
170 // from native so as to resolve the jthread.
171
172 ThreadInVMfromNative __tiv(current_thread);
173 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
174 debug_only(VMNativeEntryWrapper __vew;)
175
176 oop thread_oop = JNIHandles::resolve_external_guard(thread);
177 if (thread_oop == NULL) {
178 return JVMTI_ERROR_INVALID_THREAD;
179 }
180 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
181 return JVMTI_ERROR_INVALID_THREAD;
182 }
183 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
184 if (java_thread == NULL) {
185 return JVMTI_ERROR_THREAD_NOT_ALIVE;
186 }
187 JvmtiThreadState* state = java_thread->jvmti_thread_state();
188 *data_ptr = (state == NULL) ? NULL :
189 state->env_thread_state(this)->get_agent_thread_local_storage_data();
190 }
191 return JVMTI_ERROR_NONE;
192 } /* end GetThreadLocalStorage */
193
194 //
195 // Module functions
196 //
197
198 // module_count_ptr - pre-checked for NULL
199 // modules_ptr - pre-checked for NULL
200 jvmtiError
201 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
202 JvmtiModuleClosure jmc;
203
204 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
205 } /* end GetAllModules */
206
207
208 // class_loader - NULL is a valid value, must be pre-checked
209 // package_name - pre-checked for NULL
210 // module_ptr - pre-checked for NULL
211 jvmtiError
212 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
213 JavaThread* THREAD = JavaThread::current(); // pass to macros
214 ResourceMark rm(THREAD);
215
216 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
217 // Check that loader is a subclass of java.lang.ClassLoader.
218 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
219 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
220 }
221 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
222 if (HAS_PENDING_EXCEPTION) {
223 CLEAR_PENDING_EXCEPTION;
224 return JVMTI_ERROR_INTERNAL; // unexpected exception
225 }
226 *module_ptr = module;
227 return JVMTI_ERROR_NONE;
228 } /* end GetNamedModule */
229
230
231 // module - pre-checked for NULL
232 // to_module - pre-checked for NULL
233 jvmtiError
234 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
235 JavaThread* THREAD = JavaThread::current();
236
237 // check module
238 Handle h_module(THREAD, JNIHandles::resolve(module));
239 if (!java_lang_Module::is_instance(h_module())) {
240 return JVMTI_ERROR_INVALID_MODULE;
241 }
242 // check to_module
243 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
244 if (!java_lang_Module::is_instance(h_to_module())) {
245 return JVMTI_ERROR_INVALID_MODULE;
246 }
247 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
248 } /* end AddModuleReads */
249
250
251 // module - pre-checked for NULL
252 // pkg_name - pre-checked for NULL
253 // to_module - pre-checked for NULL
254 jvmtiError
255 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
256 JavaThread* THREAD = JavaThread::current();
257 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
258
259 // check module
260 Handle h_module(THREAD, JNIHandles::resolve(module));
261 if (!java_lang_Module::is_instance(h_module())) {
262 return JVMTI_ERROR_INVALID_MODULE;
263 }
264 // check to_module
265 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
266 if (!java_lang_Module::is_instance(h_to_module())) {
267 return JVMTI_ERROR_INVALID_MODULE;
268 }
269 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
270 } /* end AddModuleExports */
271
272
273 // module - pre-checked for NULL
274 // pkg_name - pre-checked for NULL
275 // to_module - pre-checked for NULL
276 jvmtiError
277 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
278 JavaThread* THREAD = JavaThread::current();
279 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
280
281 // check module
282 Handle h_module(THREAD, JNIHandles::resolve(module));
283 if (!java_lang_Module::is_instance(h_module())) {
284 return JVMTI_ERROR_INVALID_MODULE;
285 }
286 // check to_module
287 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
288 if (!java_lang_Module::is_instance(h_to_module())) {
289 return JVMTI_ERROR_INVALID_MODULE;
290 }
291 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
292 } /* end AddModuleOpens */
293
294
295 // module - pre-checked for NULL
296 // service - pre-checked for NULL
297 jvmtiError
298 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
299 JavaThread* THREAD = JavaThread::current();
300
301 // check module
302 Handle h_module(THREAD, JNIHandles::resolve(module));
303 if (!java_lang_Module::is_instance(h_module())) {
304 return JVMTI_ERROR_INVALID_MODULE;
305 }
306 // check service
307 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
308 if (!java_lang_Class::is_instance(h_service()) ||
309 java_lang_Class::is_primitive(h_service())) {
310 return JVMTI_ERROR_INVALID_CLASS;
311 }
312 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
313 } /* end AddModuleUses */
314
315
316 // module - pre-checked for NULL
317 // service - pre-checked for NULL
318 // impl_class - pre-checked for NULL
319 jvmtiError
320 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
321 JavaThread* THREAD = JavaThread::current();
322
323 // check module
324 Handle h_module(THREAD, JNIHandles::resolve(module));
325 if (!java_lang_Module::is_instance(h_module())) {
326 return JVMTI_ERROR_INVALID_MODULE;
327 }
328 // check service
329 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
330 if (!java_lang_Class::is_instance(h_service()) ||
331 java_lang_Class::is_primitive(h_service())) {
332 return JVMTI_ERROR_INVALID_CLASS;
333 }
334 // check impl_class
335 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
336 if (!java_lang_Class::is_instance(h_impl_class()) ||
337 java_lang_Class::is_primitive(h_impl_class())) {
338 return JVMTI_ERROR_INVALID_CLASS;
339 }
340 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
341 } /* end AddModuleProvides */
342
343 // module - pre-checked for NULL
344 // is_modifiable_class_ptr - pre-checked for NULL
345 jvmtiError
346 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
347 JavaThread* THREAD = JavaThread::current();
348
349 // check module
350 Handle h_module(THREAD, JNIHandles::resolve(module));
351 if (!java_lang_Module::is_instance(h_module())) {
352 return JVMTI_ERROR_INVALID_MODULE;
353 }
354
355 *is_modifiable_module_ptr = JNI_TRUE;
356 return JVMTI_ERROR_NONE;
357 } /* end IsModifiableModule */
358
359
360 //
361 // Class functions
362 //
363
364 // class_count_ptr - pre-checked for NULL
365 // classes_ptr - pre-checked for NULL
366 jvmtiError
367 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
368 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
369 } /* end GetLoadedClasses */
370
371
372 // initiating_loader - NULL is a valid value, must be checked
373 // class_count_ptr - pre-checked for NULL
374 // classes_ptr - pre-checked for NULL
375 jvmtiError
376 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
377 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
378 class_count_ptr, classes_ptr);
379 } /* end GetClassLoaderClasses */
380
381 // k_mirror - may be primitive, this must be checked
382 // is_modifiable_class_ptr - pre-checked for NULL
383 jvmtiError
384 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
385 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
386 JNI_TRUE : JNI_FALSE;
387 return JVMTI_ERROR_NONE;
388 } /* end IsModifiableClass */
389
390 // class_count - pre-checked to be greater than or equal to 0
391 // classes - pre-checked for NULL
392 jvmtiError
393 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
394 //TODO: add locking
395
396 int index;
397 JavaThread* current_thread = JavaThread::current();
398 ResourceMark rm(current_thread);
399
400 jvmtiClassDefinition* class_definitions =
401 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
402 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
403
404 for (index = 0; index < class_count; index++) {
405 HandleMark hm(current_thread);
406
407 jclass jcls = classes[index];
408 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
409 if (k_mirror == NULL) {
410 return JVMTI_ERROR_INVALID_CLASS;
411 }
412 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
413 return JVMTI_ERROR_INVALID_CLASS;
414 }
415
416 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
417 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
418 }
419
420 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
421 KlassHandle klass(current_thread, k_oop);
422
423 jint status = klass->jvmti_class_status();
424 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
425 return JVMTI_ERROR_INVALID_CLASS;
426 }
427
428 instanceKlassHandle ikh(current_thread, k_oop);
429 if (ikh->get_cached_class_file_bytes() == NULL) {
430 // Not cached, we need to reconstitute the class file from the
431 // VM representation. We don't attach the reconstituted class
432 // bytes to the InstanceKlass here because they have not been
433 // validated and we're not at a safepoint.
434 JvmtiClassFileReconstituter reconstituter(ikh);
435 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
436 return reconstituter.get_error();
437 }
438
439 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
440 class_definitions[index].class_bytes = (unsigned char*)
441 reconstituter.class_file_bytes();
442 } else {
443 // it is cached, get it from the cache
444 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
445 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
446 }
447 class_definitions[index].klass = jcls;
448 }
449 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
450 VMThread::execute(&op);
451 return (op.check_error());
452 } /* end RetransformClasses */
453
454
455 // class_count - pre-checked to be greater than or equal to 0
456 // class_definitions - pre-checked for NULL
457 jvmtiError
458 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
459 //TODO: add locking
460 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
461 VMThread::execute(&op);
462 return (op.check_error());
463 } /* end RedefineClasses */
464
465
466 //
467 // Object functions
468 //
469
470 // size_ptr - pre-checked for NULL
471 jvmtiError
472 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
473 oop mirror = JNIHandles::resolve_external_guard(object);
474 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
475 *size_ptr = (jlong)mirror->size() * wordSize;
476 return JVMTI_ERROR_NONE;
477 } /* end GetObjectSize */
478
479 //
480 // Method functions
481 //
482
483 // prefix - NULL is a valid value, must be checked
484 jvmtiError
485 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
486 return prefix == NULL?
487 SetNativeMethodPrefixes(0, NULL) :
488 SetNativeMethodPrefixes(1, (char**)&prefix);
489 } /* end SetNativeMethodPrefix */
490
491
492 // prefix_count - pre-checked to be greater than or equal to 0
493 // prefixes - pre-checked for NULL
494 jvmtiError
495 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
496 // Have to grab JVMTI thread state lock to be sure that some thread
497 // isn't accessing the prefixes at the same time we are setting them.
498 // No locks during VM bring-up.
499 if (Threads::number_of_threads() == 0) {
500 return set_native_method_prefixes(prefix_count, prefixes);
501 } else {
502 MutexLocker mu(JvmtiThreadState_lock);
503 return set_native_method_prefixes(prefix_count, prefixes);
504 }
505 } /* end SetNativeMethodPrefixes */
506
507 //
508 // Event Management functions
509 //
510
511 // callbacks - NULL is a valid value, must be checked
512 // size_of_callbacks - pre-checked to be greater than or equal to 0
513 jvmtiError
514 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
515 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
516 return JVMTI_ERROR_NONE;
517 } /* end SetEventCallbacks */
518
519
520 // event_thread - NULL is a valid value, must be checked
521 jvmtiError
522 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
523 JavaThread* java_thread = NULL;
524 if (event_thread != NULL) {
525 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
526 if (thread_oop == NULL) {
527 return JVMTI_ERROR_INVALID_THREAD;
528 }
529 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
530 return JVMTI_ERROR_INVALID_THREAD;
531 }
532 java_thread = java_lang_Thread::thread(thread_oop);
533 if (java_thread == NULL) {
534 return JVMTI_ERROR_THREAD_NOT_ALIVE;
535 }
536 }
537
538 // event_type must be valid
539 if (!JvmtiEventController::is_valid_event_type(event_type)) {
540 return JVMTI_ERROR_INVALID_EVENT_TYPE;
541 }
542
543 // global events cannot be controlled at thread level.
544 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
545 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
546 }
547
548 bool enabled = (mode == JVMTI_ENABLE);
549
550 // assure that needed capabilities are present
551 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
552 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
553 }
554
555 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
556 record_class_file_load_hook_enabled();
557 }
558 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
559
560 return JVMTI_ERROR_NONE;
561 } /* end SetEventNotificationMode */
562
563 //
564 // Capability functions
565 //
566
567 // capabilities_ptr - pre-checked for NULL
568 jvmtiError
569 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
570 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
571 get_prohibited_capabilities(),
572 capabilities_ptr);
573 return JVMTI_ERROR_NONE;
574 } /* end GetPotentialCapabilities */
575
576
577 // capabilities_ptr - pre-checked for NULL
578 jvmtiError
579 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
580 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
581 get_prohibited_capabilities(),
582 capabilities_ptr,
583 get_capabilities());
584 } /* end AddCapabilities */
585
586
587 // capabilities_ptr - pre-checked for NULL
588 jvmtiError
589 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
590 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
591 return JVMTI_ERROR_NONE;
592 } /* end RelinquishCapabilities */
593
594
595 // capabilities_ptr - pre-checked for NULL
596 jvmtiError
597 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
598 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
599 return JVMTI_ERROR_NONE;
600 } /* end GetCapabilities */
601
602 //
603 // Class Loader Search functions
604 //
605
606 // segment - pre-checked for NULL
607 jvmtiError
608 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
609 jvmtiPhase phase = get_phase();
610 if (phase == JVMTI_PHASE_ONLOAD) {
611 Arguments::append_sysclasspath(segment);
612 return JVMTI_ERROR_NONE;
613 } else if (use_version_1_0_semantics()) {
614 // This JvmtiEnv requested version 1.0 semantics and this function
615 // is only allowed in the ONLOAD phase in version 1.0 so we need to
616 // return an error here.
617 return JVMTI_ERROR_WRONG_PHASE;
618 } else if (phase == JVMTI_PHASE_LIVE) {
619 // The phase is checked by the wrapper that called this function,
620 // but this thread could be racing with the thread that is
621 // terminating the VM so we check one more time.
622
623 // create the zip entry
624 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
625 if (zip_entry == NULL) {
626 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
627 }
628
629 // lock the loader
630 Thread* thread = Thread::current();
631 HandleMark hm;
632 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
633
634 ObjectLocker ol(loader_lock, thread);
635
636 // add the jar file to the bootclasspath
637 log_info(class, load)("opened: %s", zip_entry->name());
638 ClassLoaderExt::append_boot_classpath(zip_entry);
639 return JVMTI_ERROR_NONE;
640 } else {
641 return JVMTI_ERROR_WRONG_PHASE;
642 }
643
644 } /* end AddToBootstrapClassLoaderSearch */
645
646
647 // segment - pre-checked for NULL
648 jvmtiError
649 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
650 jvmtiPhase phase = get_phase();
651
652 if (phase == JVMTI_PHASE_ONLOAD) {
653 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
654 if (strcmp("java.class.path", p->key()) == 0) {
655 p->append_value(segment);
656 break;
657 }
658 }
659 return JVMTI_ERROR_NONE;
660 } else if (phase == JVMTI_PHASE_LIVE) {
661 // The phase is checked by the wrapper that called this function,
662 // but this thread could be racing with the thread that is
663 // terminating the VM so we check one more time.
664 HandleMark hm;
665
666 // create the zip entry (which will open the zip file and hence
667 // check that the segment is indeed a zip file).
668 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
669 if (zip_entry == NULL) {
670 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
671 }
672 delete zip_entry; // no longer needed
673
674 // lock the loader
675 Thread* THREAD = Thread::current();
676 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
677
678 ObjectLocker ol(loader, THREAD);
679
680 // need the path as java.lang.String
681 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
682 if (HAS_PENDING_EXCEPTION) {
683 CLEAR_PENDING_EXCEPTION;
684 return JVMTI_ERROR_INTERNAL;
685 }
686
687 instanceKlassHandle loader_ik(THREAD, loader->klass());
688
689 // Invoke the appendToClassPathForInstrumentation method - if the method
690 // is not found it means the loader doesn't support adding to the class path
691 // in the live phase.
692 {
693 JavaValue res(T_VOID);
694 JavaCalls::call_special(&res,
695 loader,
696 loader_ik,
697 vmSymbols::appendToClassPathForInstrumentation_name(),
698 vmSymbols::appendToClassPathForInstrumentation_signature(),
699 path,
700 THREAD);
701 if (HAS_PENDING_EXCEPTION) {
702 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
703 CLEAR_PENDING_EXCEPTION;
704
705 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
706 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
707 } else {
708 return JVMTI_ERROR_INTERNAL;
709 }
710 }
711 }
712
713 return JVMTI_ERROR_NONE;
714 } else {
715 return JVMTI_ERROR_WRONG_PHASE;
716 }
717 } /* end AddToSystemClassLoaderSearch */
718
719 //
720 // General functions
721 //
722
723 // phase_ptr - pre-checked for NULL
724 jvmtiError
725 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
726 *phase_ptr = phase();
727 return JVMTI_ERROR_NONE;
728 } /* end GetPhase */
729
730
731 jvmtiError
732 JvmtiEnv::DisposeEnvironment() {
733 dispose();
734 return JVMTI_ERROR_NONE;
735 } /* end DisposeEnvironment */
736
737
738 // data - NULL is a valid value, must be checked
739 jvmtiError
740 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
741 set_env_local_storage(data);
742 return JVMTI_ERROR_NONE;
743 } /* end SetEnvironmentLocalStorage */
744
745
746 // data_ptr - pre-checked for NULL
747 jvmtiError
748 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
749 *data_ptr = (void*)get_env_local_storage();
750 return JVMTI_ERROR_NONE;
751 } /* end GetEnvironmentLocalStorage */
752
753 // version_ptr - pre-checked for NULL
754 jvmtiError
755 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
756 *version_ptr = JVMTI_VERSION;
757 return JVMTI_ERROR_NONE;
758 } /* end GetVersionNumber */
759
760
761 // name_ptr - pre-checked for NULL
762 jvmtiError
763 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
764 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
765 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
766 }
767 const char *name = JvmtiUtil::error_name(error);
768 if (name == NULL) {
769 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
770 }
771 size_t len = strlen(name) + 1;
772 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
773 if (err == JVMTI_ERROR_NONE) {
774 memcpy(*name_ptr, name, len);
775 }
776 return err;
777 } /* end GetErrorName */
778
779
780 jvmtiError
781 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
782 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
783 switch (flag) {
784 case JVMTI_VERBOSE_OTHER:
785 // ignore
786 break;
787 case JVMTI_VERBOSE_CLASS:
788 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
789 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
790 break;
791 case JVMTI_VERBOSE_GC:
792 if (value == 0) {
793 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
794 } else {
795 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
796 }
797 break;
798 case JVMTI_VERBOSE_JNI:
799 PrintJNIResolving = value != 0;
800 break;
801 default:
802 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
803 };
804 return JVMTI_ERROR_NONE;
805 } /* end SetVerboseFlag */
806
807
808 // format_ptr - pre-checked for NULL
809 jvmtiError
810 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
811 *format_ptr = JVMTI_JLOCATION_JVMBCI;
812 return JVMTI_ERROR_NONE;
813 } /* end GetJLocationFormat */
814
815 //
816 // Thread functions
817 //
818
819 // Threads_lock NOT held
820 // thread - NOT pre-checked
821 // thread_state_ptr - pre-checked for NULL
822 jvmtiError
823 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
824 jint state;
825 oop thread_oop;
826 JavaThread* thr;
827
828 if (thread == NULL) {
829 thread_oop = JavaThread::current()->threadObj();
830 } else {
831 thread_oop = JNIHandles::resolve_external_guard(thread);
832 }
833
834 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
835 return JVMTI_ERROR_INVALID_THREAD;
836 }
837
838 // get most state bits
839 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
840
841 // add more state bits
842 thr = java_lang_Thread::thread(thread_oop);
843 if (thr != NULL) {
844 JavaThreadState jts = thr->thread_state();
845
846 if (thr->is_being_ext_suspended()) {
847 state |= JVMTI_THREAD_STATE_SUSPENDED;
848 }
849 if (jts == _thread_in_native) {
850 state |= JVMTI_THREAD_STATE_IN_NATIVE;
851 }
852 OSThread* osThread = thr->osthread();
853 if (osThread != NULL && osThread->interrupted()) {
854 state |= JVMTI_THREAD_STATE_INTERRUPTED;
855 }
856 }
857
858 *thread_state_ptr = state;
859 return JVMTI_ERROR_NONE;
860 } /* end GetThreadState */
861
862
863 // thread_ptr - pre-checked for NULL
864 jvmtiError
865 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
866 JavaThread* current_thread = JavaThread::current();
867 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
868 return JVMTI_ERROR_NONE;
869 } /* end GetCurrentThread */
870
871
872 // threads_count_ptr - pre-checked for NULL
873 // threads_ptr - pre-checked for NULL
874 jvmtiError
875 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
876 int nthreads = 0;
877 Handle *thread_objs = NULL;
878 ResourceMark rm;
879 HandleMark hm;
880
881 // enumerate threads (including agent threads)
882 ThreadsListEnumerator tle(Thread::current(), true);
883 nthreads = tle.num_threads();
884 *threads_count_ptr = nthreads;
885
886 if (nthreads == 0) {
887 *threads_ptr = NULL;
888 return JVMTI_ERROR_NONE;
889 }
890
891 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
892 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
893
894 for (int i=0; i < nthreads; i++) {
895 thread_objs[i] = Handle(tle.get_threadObj(i));
896 }
897
898 // have to make global handles outside of Threads_lock
899 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
900 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
901
902 *threads_ptr = jthreads;
903 return JVMTI_ERROR_NONE;
904 } /* end GetAllThreads */
905
906
907 // Threads_lock NOT held, java_thread not protected by lock
908 // java_thread - pre-checked
909 jvmtiError
910 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
911 // don't allow hidden thread suspend request.
912 if (java_thread->is_hidden_from_external_view()) {
913 return (JVMTI_ERROR_NONE);
914 }
915
916 {
917 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
918 if (java_thread->is_external_suspend()) {
919 // don't allow nested external suspend requests.
920 return (JVMTI_ERROR_THREAD_SUSPENDED);
921 }
922 if (java_thread->is_exiting()) { // thread is in the process of exiting
923 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
924 }
925 java_thread->set_external_suspend();
926 }
927
928 if (!JvmtiSuspendControl::suspend(java_thread)) {
929 // the thread was in the process of exiting
930 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
931 }
932 return JVMTI_ERROR_NONE;
933 } /* end SuspendThread */
934
935
936 // request_count - pre-checked to be greater than or equal to 0
937 // request_list - pre-checked for NULL
938 // results - pre-checked for NULL
939 jvmtiError
940 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
941 int needSafepoint = 0; // > 0 if we need a safepoint
942 for (int i = 0; i < request_count; i++) {
943 JavaThread *java_thread = get_JavaThread(request_list[i]);
944 if (java_thread == NULL) {
945 results[i] = JVMTI_ERROR_INVALID_THREAD;
946 continue;
947 }
948 // the thread has not yet run or has exited (not on threads list)
949 if (java_thread->threadObj() == NULL) {
950 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
951 continue;
952 }
953 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
954 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
955 continue;
956 }
957 // don't allow hidden thread suspend request.
958 if (java_thread->is_hidden_from_external_view()) {
959 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
960 continue;
961 }
962
963 {
964 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
965 if (java_thread->is_external_suspend()) {
966 // don't allow nested external suspend requests.
967 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
968 continue;
969 }
970 if (java_thread->is_exiting()) { // thread is in the process of exiting
971 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
972 continue;
973 }
974 java_thread->set_external_suspend();
975 }
976 if (java_thread->thread_state() == _thread_in_native) {
977 // We need to try and suspend native threads here. Threads in
978 // other states will self-suspend on their next transition.
979 if (!JvmtiSuspendControl::suspend(java_thread)) {
980 // The thread was in the process of exiting. Force another
981 // safepoint to make sure that this thread transitions.
982 needSafepoint++;
983 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
984 continue;
985 }
986 } else {
987 needSafepoint++;
988 }
989 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
990 }
991 if (needSafepoint > 0) {
992 VM_ForceSafepoint vfs;
993 VMThread::execute(&vfs);
994 }
995 // per-thread suspend results returned via results parameter
996 return JVMTI_ERROR_NONE;
997 } /* end SuspendThreadList */
998
999
1000 // Threads_lock NOT held, java_thread not protected by lock
1001 // java_thread - pre-checked
1002 jvmtiError
1003 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1004 // don't allow hidden thread resume request.
1005 if (java_thread->is_hidden_from_external_view()) {
1006 return JVMTI_ERROR_NONE;
1007 }
1008
1009 if (!java_thread->is_being_ext_suspended()) {
1010 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1011 }
1012
1013 if (!JvmtiSuspendControl::resume(java_thread)) {
1014 return JVMTI_ERROR_INTERNAL;
1015 }
1016 return JVMTI_ERROR_NONE;
1017 } /* end ResumeThread */
1018
1019
1020 // request_count - pre-checked to be greater than or equal to 0
1021 // request_list - pre-checked for NULL
1022 // results - pre-checked for NULL
1023 jvmtiError
1024 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1025 for (int i = 0; i < request_count; i++) {
1026 JavaThread *java_thread = get_JavaThread(request_list[i]);
1027 if (java_thread == NULL) {
1028 results[i] = JVMTI_ERROR_INVALID_THREAD;
1029 continue;
1030 }
1031 // don't allow hidden thread resume request.
1032 if (java_thread->is_hidden_from_external_view()) {
1033 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1034 continue;
1035 }
1036 if (!java_thread->is_being_ext_suspended()) {
1037 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1038 continue;
1039 }
1040
1041 if (!JvmtiSuspendControl::resume(java_thread)) {
1042 results[i] = JVMTI_ERROR_INTERNAL;
1043 continue;
1044 }
1045
1046 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1047 }
1048 // per-thread resume results returned via results parameter
1049 return JVMTI_ERROR_NONE;
1050 } /* end ResumeThreadList */
1051
1052
1053 // Threads_lock NOT held, java_thread not protected by lock
1054 // java_thread - pre-checked
1055 jvmtiError
1056 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1057 oop e = JNIHandles::resolve_external_guard(exception);
1058 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1059
1060 JavaThread::send_async_exception(java_thread->threadObj(), e);
1061
1062 return JVMTI_ERROR_NONE;
1063
1064 } /* end StopThread */
1065
1066
1067 // Threads_lock NOT held
1068 // thread - NOT pre-checked
1069 jvmtiError
1070 JvmtiEnv::InterruptThread(jthread thread) {
1071 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1072 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
1073 return JVMTI_ERROR_INVALID_THREAD;
1074
1075 JavaThread* current_thread = JavaThread::current();
1076
1077 // Todo: this is a duplicate of JVM_Interrupt; share code in future
1078 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
1079 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
1080 // We need to re-resolve the java_thread, since a GC might have happened during the
1081 // acquire of the lock
1082
1083 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
1084 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
1085
1086 Thread::interrupt(java_thread);
1087
1088 return JVMTI_ERROR_NONE;
1089 } /* end InterruptThread */
1090
1091
1092 // Threads_lock NOT held
1093 // thread - NOT pre-checked
1094 // info_ptr - pre-checked for NULL
1095 jvmtiError
1096 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1097 ResourceMark rm;
1098 HandleMark hm;
1099
1100 JavaThread* current_thread = JavaThread::current();
1101
1102 // if thread is NULL the current thread is used
1103 oop thread_oop;
1104 if (thread == NULL) {
1105 thread_oop = current_thread->threadObj();
1106 } else {
1107 thread_oop = JNIHandles::resolve_external_guard(thread);
1108 }
1109 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
1110 return JVMTI_ERROR_INVALID_THREAD;
1111
1112 Handle thread_obj(current_thread, thread_oop);
1113 Handle name;
1114 ThreadPriority priority;
1115 Handle thread_group;
1116 Handle context_class_loader;
1117 bool is_daemon;
1118
1119 { MutexLocker mu(Threads_lock);
1120
1121 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1122 priority = java_lang_Thread::priority(thread_obj());
1123 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1124 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1125
1126 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1127 context_class_loader = Handle(current_thread, loader);
1128 }
1129 { const char *n;
1130
1131 if (name() != NULL) {
1132 n = java_lang_String::as_utf8_string(name());
1133 } else {
1134 int utf8_length = 0;
1135 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1136 }
1137
1138 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1139 if (info_ptr->name == NULL)
1140 return JVMTI_ERROR_OUT_OF_MEMORY;
1141
1142 strcpy(info_ptr->name, n);
1143 }
1144 info_ptr->is_daemon = is_daemon;
1145 info_ptr->priority = priority;
1146
1147 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1148 jni_reference(context_class_loader);
1149 info_ptr->thread_group = jni_reference(thread_group);
1150
1151 return JVMTI_ERROR_NONE;
1152 } /* end GetThreadInfo */
1153
1154
1155 // Threads_lock NOT held, java_thread not protected by lock
1156 // java_thread - pre-checked
1157 // owned_monitor_count_ptr - pre-checked for NULL
1158 // owned_monitors_ptr - pre-checked for NULL
1159 jvmtiError
1160 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1161 jvmtiError err = JVMTI_ERROR_NONE;
1162 JavaThread* calling_thread = JavaThread::current();
1163
1164 // growable array of jvmti monitors info on the C-heap
1165 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1166 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1167
1168 // It is only safe to perform the direct operation on the current
1169 // thread. All other usage needs to use a vm-safepoint-op for safety.
1170 if (java_thread == calling_thread) {
1171 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1172 } else {
1173 // JVMTI get monitors info at safepoint. Do not require target thread to
1174 // be suspended.
1175 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1176 VMThread::execute(&op);
1177 err = op.result();
1178 }
1179 jint owned_monitor_count = owned_monitors_list->length();
1180 if (err == JVMTI_ERROR_NONE) {
1181 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1182 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1183 // copy into the returned array
1184 for (int i = 0; i < owned_monitor_count; i++) {
1185 (*owned_monitors_ptr)[i] =
1186 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1187 }
1188 *owned_monitor_count_ptr = owned_monitor_count;
1189 }
1190 }
1191 // clean up.
1192 for (int i = 0; i < owned_monitor_count; i++) {
1193 deallocate((unsigned char*)owned_monitors_list->at(i));
1194 }
1195 delete owned_monitors_list;
1196
1197 return err;
1198 } /* end GetOwnedMonitorInfo */
1199
1200
1201 // Threads_lock NOT held, java_thread not protected by lock
1202 // java_thread - pre-checked
1203 // monitor_info_count_ptr - pre-checked for NULL
1204 // monitor_info_ptr - pre-checked for NULL
1205 jvmtiError
1206 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1207 jvmtiError err = JVMTI_ERROR_NONE;
1208 JavaThread* calling_thread = JavaThread::current();
1209
1210 // growable array of jvmti monitors info on the C-heap
1211 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1212 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1213
1214 // It is only safe to perform the direct operation on the current
1215 // thread. All other usage needs to use a vm-safepoint-op for safety.
1216 if (java_thread == calling_thread) {
1217 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1218 } else {
1219 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1220 // be suspended.
1221 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1222 VMThread::execute(&op);
1223 err = op.result();
1224 }
1225
1226 jint owned_monitor_count = owned_monitors_list->length();
1227 if (err == JVMTI_ERROR_NONE) {
1228 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1229 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1230 // copy to output array.
1231 for (int i = 0; i < owned_monitor_count; i++) {
1232 (*monitor_info_ptr)[i].monitor =
1233 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1234 (*monitor_info_ptr)[i].stack_depth =
1235 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1236 }
1237 }
1238 *monitor_info_count_ptr = owned_monitor_count;
1239 }
1240
1241 // clean up.
1242 for (int i = 0; i < owned_monitor_count; i++) {
1243 deallocate((unsigned char*)owned_monitors_list->at(i));
1244 }
1245 delete owned_monitors_list;
1246
1247 return err;
1248 } /* end GetOwnedMonitorStackDepthInfo */
1249
1250
1251 // Threads_lock NOT held, java_thread not protected by lock
1252 // java_thread - pre-checked
1253 // monitor_ptr - pre-checked for NULL
1254 jvmtiError
1255 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1256 jvmtiError err = JVMTI_ERROR_NONE;
1257 JavaThread* calling_thread = JavaThread::current();
1258
1259 // It is only safe to perform the direct operation on the current
1260 // thread. All other usage needs to use a vm-safepoint-op for safety.
1261 if (java_thread == calling_thread) {
1262 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1263 } else {
1264 // get contended monitor information at safepoint.
1265 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1266 VMThread::execute(&op);
1267 err = op.result();
1268 }
1269 return err;
1270 } /* end GetCurrentContendedMonitor */
1271
1272
1273 // Threads_lock NOT held
1274 // thread - NOT pre-checked
1275 // proc - pre-checked for NULL
1276 // arg - NULL is a valid value, must be checked
1277 jvmtiError
1278 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1279 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1280 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1281 return JVMTI_ERROR_INVALID_THREAD;
1282 }
1283 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1284 return JVMTI_ERROR_INVALID_PRIORITY;
1285 }
1286
1287 //Thread-self
1288 JavaThread* current_thread = JavaThread::current();
1289
1290 Handle thread_hndl(current_thread, thread_oop);
1291 {
1292 MutexLocker mu(Threads_lock); // grab Threads_lock
1293
1294 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1295
1296 // At this point it may be possible that no osthread was created for the
1297 // JavaThread due to lack of memory.
1298 if (new_thread == NULL || new_thread->osthread() == NULL) {
1299 if (new_thread) delete new_thread;
1300 return JVMTI_ERROR_OUT_OF_MEMORY;
1301 }
1302
1303 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1304 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1305 java_lang_Thread::set_daemon(thread_hndl());
1306
1307 new_thread->set_threadObj(thread_hndl());
1308 Threads::add(new_thread);
1309 Thread::start(new_thread);
1310 } // unlock Threads_lock
1311
1312 return JVMTI_ERROR_NONE;
1313 } /* end RunAgentThread */
1314
1315 //
1316 // Thread Group functions
1317 //
1318
1319 // group_count_ptr - pre-checked for NULL
1320 // groups_ptr - pre-checked for NULL
1321 jvmtiError
1322 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1323 JavaThread* current_thread = JavaThread::current();
1324
1325 // Only one top level thread group now.
1326 *group_count_ptr = 1;
1327
1328 // Allocate memory to store global-refs to the thread groups.
1329 // Assume this area is freed by caller.
1330 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1331
1332 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1333
1334 // Convert oop to Handle, then convert Handle to global-ref.
1335 {
1336 HandleMark hm(current_thread);
1337 Handle system_thread_group(current_thread, Universe::system_thread_group());
1338 *groups_ptr[0] = jni_reference(system_thread_group);
1339 }
1340
1341 return JVMTI_ERROR_NONE;
1342 } /* end GetTopThreadGroups */
1343
1344
1345 // info_ptr - pre-checked for NULL
1346 jvmtiError
1347 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1348 ResourceMark rm;
1349 HandleMark hm;
1350
1351 JavaThread* current_thread = JavaThread::current();
1352
1353 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1354 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1355
1356 const char* name;
1357 Handle parent_group;
1358 bool is_daemon;
1359 ThreadPriority max_priority;
1360
1361 { MutexLocker mu(Threads_lock);
1362
1363 name = java_lang_ThreadGroup::name(group_obj());
1364 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1365 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1366 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1367 }
1368
1369 info_ptr->is_daemon = is_daemon;
1370 info_ptr->max_priority = max_priority;
1371 info_ptr->parent = jni_reference(parent_group);
1372
1373 if (name != NULL) {
1374 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1375 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1376 strcpy(info_ptr->name, name);
1377 } else {
1378 info_ptr->name = NULL;
1379 }
1380
1381 return JVMTI_ERROR_NONE;
1382 } /* end GetThreadGroupInfo */
1383
1384
1385 // thread_count_ptr - pre-checked for NULL
1386 // threads_ptr - pre-checked for NULL
1387 // group_count_ptr - pre-checked for NULL
1388 // groups_ptr - pre-checked for NULL
1389 jvmtiError
1390 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1391 JavaThread* current_thread = JavaThread::current();
1392 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1393 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1394
1395 Handle *thread_objs = NULL;
1396 Handle *group_objs = NULL;
1397 int nthreads = 0;
1398 int ngroups = 0;
1399 int hidden_threads = 0;
1400
1401 ResourceMark rm;
1402 HandleMark hm;
1403
1404 Handle group_hdl(current_thread, group_obj);
1405
1406 { MutexLocker mu(Threads_lock);
1407
1408 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1409 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1410
1411 if (nthreads > 0) {
1412 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1413 assert(nthreads <= threads->length(), "too many threads");
1414 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1415 for (int i=0, j=0; i<nthreads; i++) {
1416 oop thread_obj = threads->obj_at(i);
1417 assert(thread_obj != NULL, "thread_obj is NULL");
1418 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1419 // Filter out hidden java threads.
1420 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1421 hidden_threads++;
1422 continue;
1423 }
1424 thread_objs[j++] = Handle(current_thread, thread_obj);
1425 }
1426 nthreads -= hidden_threads;
1427 }
1428 if (ngroups > 0) {
1429 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1430 assert(ngroups <= groups->length(), "too many threads");
1431 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1432 for (int i=0; i<ngroups; i++) {
1433 oop group_obj = groups->obj_at(i);
1434 assert(group_obj != NULL, "group_obj != NULL");
1435 group_objs[i] = Handle(current_thread, group_obj);
1436 }
1437 }
1438 }
1439
1440 // have to make global handles outside of Threads_lock
1441 *group_count_ptr = ngroups;
1442 *thread_count_ptr = nthreads;
1443 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1444 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1445 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1446 return JVMTI_ERROR_OUT_OF_MEMORY;
1447 }
1448 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1449 return JVMTI_ERROR_OUT_OF_MEMORY;
1450 }
1451
1452 return JVMTI_ERROR_NONE;
1453 } /* end GetThreadGroupChildren */
1454
1455
1456 //
1457 // Stack Frame functions
1458 //
1459
1460 // Threads_lock NOT held, java_thread not protected by lock
1461 // java_thread - pre-checked
1462 // max_frame_count - pre-checked to be greater than or equal to 0
1463 // frame_buffer - pre-checked for NULL
1464 // count_ptr - pre-checked for NULL
1465 jvmtiError
1466 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1467 jvmtiError err = JVMTI_ERROR_NONE;
1468
1469 // It is only safe to perform the direct operation on the current
1470 // thread. All other usage needs to use a vm-safepoint-op for safety.
1471 if (java_thread == JavaThread::current()) {
1472 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1473 } else {
1474 // JVMTI get stack trace at safepoint. Do not require target thread to
1475 // be suspended.
1476 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1477 VMThread::execute(&op);
1478 err = op.result();
1479 }
1480
1481 return err;
1482 } /* end GetStackTrace */
1483
1484
1485 // max_frame_count - pre-checked to be greater than or equal to 0
1486 // stack_info_ptr - pre-checked for NULL
1487 // thread_count_ptr - pre-checked for NULL
1488 jvmtiError
1489 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1490 jvmtiError err = JVMTI_ERROR_NONE;
1491 JavaThread* calling_thread = JavaThread::current();
1492
1493 // JVMTI get stack traces at safepoint.
1494 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1495 VMThread::execute(&op);
1496 *thread_count_ptr = op.final_thread_count();
1497 *stack_info_ptr = op.stack_info();
1498 err = op.result();
1499 return err;
1500 } /* end GetAllStackTraces */
1501
1502
1503 // thread_count - pre-checked to be greater than or equal to 0
1504 // thread_list - pre-checked for NULL
1505 // max_frame_count - pre-checked to be greater than or equal to 0
1506 // stack_info_ptr - pre-checked for NULL
1507 jvmtiError
1508 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1509 jvmtiError err = JVMTI_ERROR_NONE;
1510 // JVMTI get stack traces at safepoint.
1511 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1512 VMThread::execute(&op);
1513 err = op.result();
1514 if (err == JVMTI_ERROR_NONE) {
1515 *stack_info_ptr = op.stack_info();
1516 }
1517 return err;
1518 } /* end GetThreadListStackTraces */
1519
1520
1521 // Threads_lock NOT held, java_thread not protected by lock
1522 // java_thread - pre-checked
1523 // count_ptr - pre-checked for NULL
1524 jvmtiError
1525 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1526 jvmtiError err = JVMTI_ERROR_NONE;
1527
1528 // retrieve or create JvmtiThreadState.
1529 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1530 if (state == NULL) {
1531 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1532 }
1533
1534 // It is only safe to perform the direct operation on the current
1535 // thread. All other usage needs to use a vm-safepoint-op for safety.
1536 if (java_thread == JavaThread::current()) {
1537 err = get_frame_count(state, count_ptr);
1538 } else {
1539 // get java stack frame count at safepoint.
1540 VM_GetFrameCount op(this, state, count_ptr);
1541 VMThread::execute(&op);
1542 err = op.result();
1543 }
1544 return err;
1545 } /* end GetFrameCount */
1546
1547
1548 // Threads_lock NOT held, java_thread not protected by lock
1549 // java_thread - pre-checked
1550 jvmtiError
1551 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1552 JavaThread* current_thread = JavaThread::current();
1553 HandleMark hm(current_thread);
1554 uint32_t debug_bits = 0;
1555
1556 // retrieve or create the state
1557 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1558 if (state == NULL) {
1559 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1560 }
1561
1562 // Check if java_thread is fully suspended
1563 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1564 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1565 }
1566 // Check to see if a PopFrame was already in progress
1567 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1568 // Probably possible for JVMTI clients to trigger this, but the
1569 // JPDA backend shouldn't allow this to happen
1570 return JVMTI_ERROR_INTERNAL;
1571 }
1572
1573 {
1574 // Was workaround bug
1575 // 4812902: popFrame hangs if the method is waiting at a synchronize
1576 // Catch this condition and return an error to avoid hanging.
1577 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1578 OSThread* osThread = java_thread->osthread();
1579 if (osThread->get_state() == MONITOR_WAIT) {
1580 return JVMTI_ERROR_OPAQUE_FRAME;
1581 }
1582 }
1583
1584 {
1585 ResourceMark rm(current_thread);
1586 // Check if there are more than one Java frame in this thread, that the top two frames
1587 // are Java (not native) frames, and that there is no intervening VM frame
1588 int frame_count = 0;
1589 bool is_interpreted[2];
1590 intptr_t *frame_sp[2];
1591 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1592 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1593 methodHandle mh(current_thread, vfs.method());
1594 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1595 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1596 frame_sp[frame_count] = vfs.frame_id();
1597 if (++frame_count > 1) break;
1598 }
1599 if (frame_count < 2) {
1600 // We haven't found two adjacent non-native Java frames on the top.
1601 // There can be two situations here:
1602 // 1. There are no more java frames
1603 // 2. Two top java frames are separated by non-java native frames
1604 if(vframeFor(java_thread, 1) == NULL) {
1605 return JVMTI_ERROR_NO_MORE_FRAMES;
1606 } else {
1607 // Intervening non-java native or VM frames separate java frames.
1608 // Current implementation does not support this. See bug #5031735.
1609 // In theory it is possible to pop frames in such cases.
1610 return JVMTI_ERROR_OPAQUE_FRAME;
1611 }
1612 }
1613
1614 // If any of the top 2 frames is a compiled one, need to deoptimize it
1615 for (int i = 0; i < 2; i++) {
1616 if (!is_interpreted[i]) {
1617 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1618 }
1619 }
1620
1621 // Update the thread state to reflect that the top frame is popped
1622 // so that cur_stack_depth is maintained properly and all frameIDs
1623 // are invalidated.
1624 // The current frame will be popped later when the suspended thread
1625 // is resumed and right before returning from VM to Java.
1626 // (see call_VM_base() in assembler_<cpu>.cpp).
1627
1628 // It's fine to update the thread state here because no JVMTI events
1629 // shall be posted for this PopFrame.
1630
1631 // It is only safe to perform the direct operation on the current
1632 // thread. All other usage needs to use a vm-safepoint-op for safety.
1633 if (java_thread == JavaThread::current()) {
1634 state->update_for_pop_top_frame();
1635 } else {
1636 VM_UpdateForPopTopFrame op(state);
1637 VMThread::execute(&op);
1638 jvmtiError err = op.result();
1639 if (err != JVMTI_ERROR_NONE) {
1640 return err;
1641 }
1642 }
1643
1644 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1645 // Set pending step flag for this popframe and it is cleared when next
1646 // step event is posted.
1647 state->set_pending_step_for_popframe();
1648 }
1649
1650 return JVMTI_ERROR_NONE;
1651 } /* end PopFrame */
1652
1653
1654 // Threads_lock NOT held, java_thread not protected by lock
1655 // java_thread - pre-checked
1656 // java_thread - unchecked
1657 // depth - pre-checked as non-negative
1658 // method_ptr - pre-checked for NULL
1659 // location_ptr - pre-checked for NULL
1660 jvmtiError
1661 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1662 jvmtiError err = JVMTI_ERROR_NONE;
1663
1664 // It is only safe to perform the direct operation on the current
1665 // thread. All other usage needs to use a vm-safepoint-op for safety.
1666 if (java_thread == JavaThread::current()) {
1667 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1668 } else {
1669 // JVMTI get java stack frame location at safepoint.
1670 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1671 VMThread::execute(&op);
1672 err = op.result();
1673 }
1674 return err;
1675 } /* end GetFrameLocation */
1676
1677
1678 // Threads_lock NOT held, java_thread not protected by lock
1679 // java_thread - pre-checked
1680 // java_thread - unchecked
1681 // depth - pre-checked as non-negative
1682 jvmtiError
1683 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1684 jvmtiError err = JVMTI_ERROR_NONE;
1685 ResourceMark rm;
1686 uint32_t debug_bits = 0;
1687
1688 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1689 if (state == NULL) {
1690 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1691 }
1692
1693 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1694 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1695 }
1696
1697 if (TraceJVMTICalls) {
1698 JvmtiSuspendControl::print();
1699 }
1700
1701 vframe *vf = vframeFor(java_thread, depth);
1702 if (vf == NULL) {
1703 return JVMTI_ERROR_NO_MORE_FRAMES;
1704 }
1705
1706 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1707 return JVMTI_ERROR_OPAQUE_FRAME;
1708 }
1709
1710 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1711
1712 // It is only safe to perform the direct operation on the current
1713 // thread. All other usage needs to use a vm-safepoint-op for safety.
1714 if (java_thread == JavaThread::current()) {
1715 int frame_number = state->count_frames() - depth;
1716 state->env_thread_state(this)->set_frame_pop(frame_number);
1717 } else {
1718 VM_SetFramePop op(this, state, depth);
1719 VMThread::execute(&op);
1720 err = op.result();
1721 }
1722 return err;
1723 } /* end NotifyFramePop */
1724
1725
1726 //
1727 // Force Early Return functions
1728 //
1729
1730 // Threads_lock NOT held, java_thread not protected by lock
1731 // java_thread - pre-checked
1732 jvmtiError
1733 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1734 jvalue val;
1735 val.l = value;
1736 return force_early_return(java_thread, val, atos);
1737 } /* end ForceEarlyReturnObject */
1738
1739
1740 // Threads_lock NOT held, java_thread not protected by lock
1741 // java_thread - pre-checked
1742 jvmtiError
1743 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1744 jvalue val;
1745 val.i = value;
1746 return force_early_return(java_thread, val, itos);
1747 } /* end ForceEarlyReturnInt */
1748
1749
1750 // Threads_lock NOT held, java_thread not protected by lock
1751 // java_thread - pre-checked
1752 jvmtiError
1753 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1754 jvalue val;
1755 val.j = value;
1756 return force_early_return(java_thread, val, ltos);
1757 } /* end ForceEarlyReturnLong */
1758
1759
1760 // Threads_lock NOT held, java_thread not protected by lock
1761 // java_thread - pre-checked
1762 jvmtiError
1763 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1764 jvalue val;
1765 val.f = value;
1766 return force_early_return(java_thread, val, ftos);
1767 } /* end ForceEarlyReturnFloat */
1768
1769
1770 // Threads_lock NOT held, java_thread not protected by lock
1771 // java_thread - pre-checked
1772 jvmtiError
1773 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1774 jvalue val;
1775 val.d = value;
1776 return force_early_return(java_thread, val, dtos);
1777 } /* end ForceEarlyReturnDouble */
1778
1779
1780 // Threads_lock NOT held, java_thread not protected by lock
1781 // java_thread - pre-checked
1782 jvmtiError
1783 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1784 jvalue val;
1785 val.j = 0L;
1786 return force_early_return(java_thread, val, vtos);
1787 } /* end ForceEarlyReturnVoid */
1788
1789
1790 //
1791 // Heap functions
1792 //
1793
1794 // klass - NULL is a valid value, must be checked
1795 // initial_object - NULL is a valid value, must be checked
1796 // callbacks - pre-checked for NULL
1797 // user_data - NULL is a valid value, must be checked
1798 jvmtiError
1799 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1800 // check klass if provided
1801 Klass* k_oop = NULL;
1802 if (klass != NULL) {
1803 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1804 if (k_mirror == NULL) {
1805 return JVMTI_ERROR_INVALID_CLASS;
1806 }
1807 if (java_lang_Class::is_primitive(k_mirror)) {
1808 return JVMTI_ERROR_NONE;
1809 }
1810 k_oop = java_lang_Class::as_Klass(k_mirror);
1811 if (k_oop == NULL) {
1812 return JVMTI_ERROR_INVALID_CLASS;
1813 }
1814 }
1815
1816 if (initial_object != NULL) {
1817 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1818 if (init_obj == NULL) {
1819 return JVMTI_ERROR_INVALID_OBJECT;
1820 }
1821 }
1822
1823 Thread *thread = Thread::current();
1824 HandleMark hm(thread);
1825 KlassHandle kh (thread, k_oop);
1826
1827 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1828 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1829 return JVMTI_ERROR_NONE;
1830 } /* end FollowReferences */
1831
1832
1833 // klass - NULL is a valid value, must be checked
1834 // callbacks - pre-checked for NULL
1835 // user_data - NULL is a valid value, must be checked
1836 jvmtiError
1837 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1838 // check klass if provided
1839 Klass* k_oop = NULL;
1840 if (klass != NULL) {
1841 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1842 if (k_mirror == NULL) {
1843 return JVMTI_ERROR_INVALID_CLASS;
1844 }
1845 if (java_lang_Class::is_primitive(k_mirror)) {
1846 return JVMTI_ERROR_NONE;
1847 }
1848 k_oop = java_lang_Class::as_Klass(k_mirror);
1849 if (k_oop == NULL) {
1850 return JVMTI_ERROR_INVALID_CLASS;
1851 }
1852 }
1853
1854 Thread *thread = Thread::current();
1855 HandleMark hm(thread);
1856 KlassHandle kh (thread, k_oop);
1857
1858 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1859 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1860 return JVMTI_ERROR_NONE;
1861 } /* end IterateThroughHeap */
1862
1863
1864 // tag_ptr - pre-checked for NULL
1865 jvmtiError
1866 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1867 oop o = JNIHandles::resolve_external_guard(object);
1868 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1869 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1870 return JVMTI_ERROR_NONE;
1871 } /* end GetTag */
1872
1873
1874 jvmtiError
1875 JvmtiEnv::SetTag(jobject object, jlong tag) {
1876 oop o = JNIHandles::resolve_external_guard(object);
1877 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1878 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1879 return JVMTI_ERROR_NONE;
1880 } /* end SetTag */
1881
1882
1883 // tag_count - pre-checked to be greater than or equal to 0
1884 // tags - pre-checked for NULL
1885 // count_ptr - pre-checked for NULL
1886 // object_result_ptr - NULL is a valid value, must be checked
1887 // tag_result_ptr - NULL is a valid value, must be checked
1888 jvmtiError
1889 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1890 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1891 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1892 } /* end GetObjectsWithTags */
1893
1894
1895 jvmtiError
1896 JvmtiEnv::ForceGarbageCollection() {
1897 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1898 return JVMTI_ERROR_NONE;
1899 } /* end ForceGarbageCollection */
1900
1901
1902 //
1903 // Heap (1.0) functions
1904 //
1905
1906 // object_reference_callback - pre-checked for NULL
1907 // user_data - NULL is a valid value, must be checked
1908 jvmtiError
1909 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1910 oop o = JNIHandles::resolve_external_guard(object);
1911 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1912 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1913 return JVMTI_ERROR_NONE;
1914 } /* end IterateOverObjectsReachableFromObject */
1915
1916
1917 // heap_root_callback - NULL is a valid value, must be checked
1918 // stack_ref_callback - NULL is a valid value, must be checked
1919 // object_ref_callback - NULL is a valid value, must be checked
1920 // user_data - NULL is a valid value, must be checked
1921 jvmtiError
1922 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1923 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1924 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1925 return JVMTI_ERROR_NONE;
1926 } /* end IterateOverReachableObjects */
1927
1928
1929 // heap_object_callback - pre-checked for NULL
1930 // user_data - NULL is a valid value, must be checked
1931 jvmtiError
1932 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1933 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1934 Thread *thread = Thread::current();
1935 HandleMark hm(thread);
1936 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1937 return JVMTI_ERROR_NONE;
1938 } /* end IterateOverHeap */
1939
1940
1941 // k_mirror - may be primitive, this must be checked
1942 // heap_object_callback - pre-checked for NULL
1943 // user_data - NULL is a valid value, must be checked
1944 jvmtiError
1945 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1946 if (java_lang_Class::is_primitive(k_mirror)) {
1947 // DO PRIMITIVE CLASS PROCESSING
1948 return JVMTI_ERROR_NONE;
1949 }
1950 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1951 if (k_oop == NULL) {
1952 return JVMTI_ERROR_INVALID_CLASS;
1953 }
1954 Thread *thread = Thread::current();
1955 HandleMark hm(thread);
1956 KlassHandle klass (thread, k_oop);
1957 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
1958 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1959 return JVMTI_ERROR_NONE;
1960 } /* end IterateOverInstancesOfClass */
1961
1962 // Start the sampler.
1963 jvmtiError
1964 JvmtiEnv::StartHeapSampling(jint monitoring_rate, jint max_storage) {
1965 if (monitoring_rate < 0) {
1966 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
1967 }
1968
1969 fprintf(stderr, "Initializing\n");
1970 HeapThreadTransition htt(Thread::current());
1971 HeapMonitoring::initialize_profiling(monitoring_rate, max_storage);
1972 return JVMTI_ERROR_NONE;
1973 } /* end StartHeapSampling */
1974
1975 // Get the currently live sampled allocations.
1976 jvmtiError
1977 JvmtiEnv::GetLiveTraces(jvmtiStackTraces *stack_traces) {
1978 HeapThreadTransition htt(Thread::current());
1979 if (stack_traces == NULL) {
1980 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
1981 }
1982
1983 HeapMonitoring::get_live_traces(stack_traces);
1984 return JVMTI_ERROR_NONE;
1985 } /* end GetLiveTraces */
1986
1987 // Release sampled traces.
1988 jvmtiError
1989 JvmtiEnv::ReleaseTraces(jvmtiStackTraces *stack_traces) {
1990 if (stack_traces == NULL) {
1991 return JVMTI_ERROR_NONE;
1992 }
1993 HeapMonitoring::release_traces(stack_traces);
1994 return JVMTI_ERROR_NONE;
1995 } /* end ReleaseTraces */
1996
1997 //
1998 // Local Variable functions
1999 //
2000
2001 // Threads_lock NOT held, java_thread not protected by lock
2002 // java_thread - pre-checked
2003 // java_thread - unchecked
2004 // depth - pre-checked as non-negative
2005 // value_ptr - pre-checked for NULL
2006 jvmtiError
2007 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2008 JavaThread* current_thread = JavaThread::current();
2009 // rm object is created to clean up the javaVFrame created in
2010 // doit_prologue(), but after doit() is finished with it.
2011 ResourceMark rm(current_thread);
2012
2013 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2014 VMThread::execute(&op);
2015 jvmtiError err = op.result();
2016 if (err != JVMTI_ERROR_NONE) {
2017 return err;
2018 } else {
2019 *value_ptr = op.value().l;
2020 return JVMTI_ERROR_NONE;
2021 }
2022 } /* end GetLocalObject */
2023
2024 // Threads_lock NOT held, java_thread not protected by lock
2025 // java_thread - pre-checked
2026 // java_thread - unchecked
2027 // depth - pre-checked as non-negative
2028 // value - pre-checked for NULL
2029 jvmtiError
2030 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2031 JavaThread* current_thread = JavaThread::current();
2032 // rm object is created to clean up the javaVFrame created in
2033 // doit_prologue(), but after doit() is finished with it.
2034 ResourceMark rm(current_thread);
2035
2036 VM_GetReceiver op(java_thread, current_thread, depth);
2037 VMThread::execute(&op);
2038 jvmtiError err = op.result();
2039 if (err != JVMTI_ERROR_NONE) {
2040 return err;
2041 } else {
2042 *value_ptr = op.value().l;
2043 return JVMTI_ERROR_NONE;
2044 }
2045 } /* end GetLocalInstance */
2046
2047
2048 // Threads_lock NOT held, java_thread not protected by lock
2049 // java_thread - pre-checked
2050 // java_thread - unchecked
2051 // depth - pre-checked as non-negative
2052 // value_ptr - pre-checked for NULL
2053 jvmtiError
2054 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2055 // rm object is created to clean up the javaVFrame created in
2056 // doit_prologue(), but after doit() is finished with it.
2057 ResourceMark rm;
2058
2059 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2060 VMThread::execute(&op);
2061 *value_ptr = op.value().i;
2062 return op.result();
2063 } /* end GetLocalInt */
2064
2065
2066 // Threads_lock NOT held, java_thread not protected by lock
2067 // java_thread - pre-checked
2068 // java_thread - unchecked
2069 // depth - pre-checked as non-negative
2070 // value_ptr - pre-checked for NULL
2071 jvmtiError
2072 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2073 // rm object is created to clean up the javaVFrame created in
2074 // doit_prologue(), but after doit() is finished with it.
2075 ResourceMark rm;
2076
2077 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2078 VMThread::execute(&op);
2079 *value_ptr = op.value().j;
2080 return op.result();
2081 } /* end GetLocalLong */
2082
2083
2084 // Threads_lock NOT held, java_thread not protected by lock
2085 // java_thread - pre-checked
2086 // java_thread - unchecked
2087 // depth - pre-checked as non-negative
2088 // value_ptr - pre-checked for NULL
2089 jvmtiError
2090 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2091 // rm object is created to clean up the javaVFrame created in
2092 // doit_prologue(), but after doit() is finished with it.
2093 ResourceMark rm;
2094
2095 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2096 VMThread::execute(&op);
2097 *value_ptr = op.value().f;
2098 return op.result();
2099 } /* end GetLocalFloat */
2100
2101
2102 // Threads_lock NOT held, java_thread not protected by lock
2103 // java_thread - pre-checked
2104 // java_thread - unchecked
2105 // depth - pre-checked as non-negative
2106 // value_ptr - pre-checked for NULL
2107 jvmtiError
2108 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2109 // rm object is created to clean up the javaVFrame created in
2110 // doit_prologue(), but after doit() is finished with it.
2111 ResourceMark rm;
2112
2113 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2114 VMThread::execute(&op);
2115 *value_ptr = op.value().d;
2116 return op.result();
2117 } /* end GetLocalDouble */
2118
2119
2120 // Threads_lock NOT held, java_thread not protected by lock
2121 // java_thread - pre-checked
2122 // java_thread - unchecked
2123 // depth - pre-checked as non-negative
2124 jvmtiError
2125 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2126 // rm object is created to clean up the javaVFrame created in
2127 // doit_prologue(), but after doit() is finished with it.
2128 ResourceMark rm;
2129 jvalue val;
2130 val.l = value;
2131 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2132 VMThread::execute(&op);
2133 return op.result();
2134 } /* end SetLocalObject */
2135
2136
2137 // Threads_lock NOT held, java_thread not protected by lock
2138 // java_thread - pre-checked
2139 // java_thread - unchecked
2140 // depth - pre-checked as non-negative
2141 jvmtiError
2142 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2143 // rm object is created to clean up the javaVFrame created in
2144 // doit_prologue(), but after doit() is finished with it.
2145 ResourceMark rm;
2146 jvalue val;
2147 val.i = value;
2148 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2149 VMThread::execute(&op);
2150 return op.result();
2151 } /* end SetLocalInt */
2152
2153
2154 // Threads_lock NOT held, java_thread not protected by lock
2155 // java_thread - pre-checked
2156 // java_thread - unchecked
2157 // depth - pre-checked as non-negative
2158 jvmtiError
2159 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2160 // rm object is created to clean up the javaVFrame created in
2161 // doit_prologue(), but after doit() is finished with it.
2162 ResourceMark rm;
2163 jvalue val;
2164 val.j = value;
2165 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2166 VMThread::execute(&op);
2167 return op.result();
2168 } /* end SetLocalLong */
2169
2170
2171 // Threads_lock NOT held, java_thread not protected by lock
2172 // java_thread - pre-checked
2173 // java_thread - unchecked
2174 // depth - pre-checked as non-negative
2175 jvmtiError
2176 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2177 // rm object is created to clean up the javaVFrame created in
2178 // doit_prologue(), but after doit() is finished with it.
2179 ResourceMark rm;
2180 jvalue val;
2181 val.f = value;
2182 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2183 VMThread::execute(&op);
2184 return op.result();
2185 } /* end SetLocalFloat */
2186
2187
2188 // Threads_lock NOT held, java_thread not protected by lock
2189 // java_thread - pre-checked
2190 // java_thread - unchecked
2191 // depth - pre-checked as non-negative
2192 jvmtiError
2193 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2194 // rm object is created to clean up the javaVFrame created in
2195 // doit_prologue(), but after doit() is finished with it.
2196 ResourceMark rm;
2197 jvalue val;
2198 val.d = value;
2199 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2200 VMThread::execute(&op);
2201 return op.result();
2202 } /* end SetLocalDouble */
2203
2204
2205 //
2206 // Breakpoint functions
2207 //
2208
2209 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2210 jvmtiError
2211 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2212 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2213 if (location < 0) { // simple invalid location check first
2214 return JVMTI_ERROR_INVALID_LOCATION;
2215 }
2216 // verify that the breakpoint is not past the end of the method
2217 if (location >= (jlocation) method_oop->code_size()) {
2218 return JVMTI_ERROR_INVALID_LOCATION;
2219 }
2220
2221 ResourceMark rm;
2222 JvmtiBreakpoint bp(method_oop, location);
2223 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2224 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2225 return JVMTI_ERROR_DUPLICATE;
2226
2227 if (TraceJVMTICalls) {
2228 jvmti_breakpoints.print();
2229 }
2230
2231 return JVMTI_ERROR_NONE;
2232 } /* end SetBreakpoint */
2233
2234
2235 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2236 jvmtiError
2237 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2238 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2239
2240 if (location < 0) { // simple invalid location check first
2241 return JVMTI_ERROR_INVALID_LOCATION;
2242 }
2243
2244 // verify that the breakpoint is not past the end of the method
2245 if (location >= (jlocation) method_oop->code_size()) {
2246 return JVMTI_ERROR_INVALID_LOCATION;
2247 }
2248
2249 JvmtiBreakpoint bp(method_oop, location);
2250
2251 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2252 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2253 return JVMTI_ERROR_NOT_FOUND;
2254
2255 if (TraceJVMTICalls) {
2256 jvmti_breakpoints.print();
2257 }
2258
2259 return JVMTI_ERROR_NONE;
2260 } /* end ClearBreakpoint */
2261
2262
2263 //
2264 // Watched Field functions
2265 //
2266
2267 jvmtiError
2268 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2269 // make sure we haven't set this watch before
2270 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2271 fdesc_ptr->set_is_field_access_watched(true);
2272
2273 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2274
2275 return JVMTI_ERROR_NONE;
2276 } /* end SetFieldAccessWatch */
2277
2278
2279 jvmtiError
2280 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2281 // make sure we have a watch to clear
2282 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2283 fdesc_ptr->set_is_field_access_watched(false);
2284
2285 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2286
2287 return JVMTI_ERROR_NONE;
2288 } /* end ClearFieldAccessWatch */
2289
2290
2291 jvmtiError
2292 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2293 // make sure we haven't set this watch before
2294 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2295 fdesc_ptr->set_is_field_modification_watched(true);
2296
2297 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2298
2299 return JVMTI_ERROR_NONE;
2300 } /* end SetFieldModificationWatch */
2301
2302
2303 jvmtiError
2304 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2305 // make sure we have a watch to clear
2306 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2307 fdesc_ptr->set_is_field_modification_watched(false);
2308
2309 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2310
2311 return JVMTI_ERROR_NONE;
2312 } /* end ClearFieldModificationWatch */
2313
2314 //
2315 // Class functions
2316 //
2317
2318
2319 // k_mirror - may be primitive, this must be checked
2320 // signature_ptr - NULL is a valid value, must be checked
2321 // generic_ptr - NULL is a valid value, must be checked
2322 jvmtiError
2323 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2324 ResourceMark rm;
2325 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2326 Klass* k = NULL;
2327 if (!isPrimitive) {
2328 k = java_lang_Class::as_Klass(k_mirror);
2329 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2330 }
2331 if (signature_ptr != NULL) {
2332 char* result = NULL;
2333 if (isPrimitive) {
2334 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2335 result = (char*) jvmtiMalloc(2);
2336 result[0] = tchar;
2337 result[1] = '\0';
2338 } else {
2339 const char* class_sig = k->signature_name();
2340 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2341 strcpy(result, class_sig);
2342 }
2343 *signature_ptr = result;
2344 }
2345 if (generic_ptr != NULL) {
2346 *generic_ptr = NULL;
2347 if (!isPrimitive && k->is_instance_klass()) {
2348 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2349 if (soo != NULL) {
2350 const char *gen_sig = soo->as_C_string();
2351 if (gen_sig != NULL) {
2352 char* gen_result;
2353 jvmtiError err = allocate(strlen(gen_sig) + 1,
2354 (unsigned char **)&gen_result);
2355 if (err != JVMTI_ERROR_NONE) {
2356 return err;
2357 }
2358 strcpy(gen_result, gen_sig);
2359 *generic_ptr = gen_result;
2360 }
2361 }
2362 }
2363 }
2364 return JVMTI_ERROR_NONE;
2365 } /* end GetClassSignature */
2366
2367
2368 // k_mirror - may be primitive, this must be checked
2369 // status_ptr - pre-checked for NULL
2370 jvmtiError
2371 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2372 jint result = 0;
2373 if (java_lang_Class::is_primitive(k_mirror)) {
2374 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2375 } else {
2376 Klass* k = java_lang_Class::as_Klass(k_mirror);
2377 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2378 result = k->jvmti_class_status();
2379 }
2380 *status_ptr = result;
2381
2382 return JVMTI_ERROR_NONE;
2383 } /* end GetClassStatus */
2384
2385
2386 // k_mirror - may be primitive, this must be checked
2387 // source_name_ptr - pre-checked for NULL
2388 jvmtiError
2389 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2390 if (java_lang_Class::is_primitive(k_mirror)) {
2391 return JVMTI_ERROR_ABSENT_INFORMATION;
2392 }
2393 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2394 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2395
2396 if (!k_klass->is_instance_klass()) {
2397 return JVMTI_ERROR_ABSENT_INFORMATION;
2398 }
2399
2400 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2401 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2402 {
2403 JavaThread* current_thread = JavaThread::current();
2404 ResourceMark rm(current_thread);
2405 const char* sfncp = (const char*) sfnOop->as_C_string();
2406 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2407 strcpy(*source_name_ptr, sfncp);
2408 }
2409
2410 return JVMTI_ERROR_NONE;
2411 } /* end GetSourceFileName */
2412
2413
2414 // k_mirror - may be primitive, this must be checked
2415 // modifiers_ptr - pre-checked for NULL
2416 jvmtiError
2417 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2418 JavaThread* current_thread = JavaThread::current();
2419 jint result = 0;
2420 if (!java_lang_Class::is_primitive(k_mirror)) {
2421 Klass* k = java_lang_Class::as_Klass(k_mirror);
2422 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2423 result = k->compute_modifier_flags(current_thread);
2424 JavaThread* THREAD = current_thread; // pass to macros
2425 if (HAS_PENDING_EXCEPTION) {
2426 CLEAR_PENDING_EXCEPTION;
2427 return JVMTI_ERROR_INTERNAL;
2428 };
2429
2430 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2431 if(k->is_super()) {
2432 result |= JVM_ACC_SUPER;
2433 }
2434 } else {
2435 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2436 }
2437 *modifiers_ptr = result;
2438
2439 return JVMTI_ERROR_NONE;
2440 } /* end GetClassModifiers */
2441
2442
2443 // k_mirror - may be primitive, this must be checked
2444 // method_count_ptr - pre-checked for NULL
2445 // methods_ptr - pre-checked for NULL
2446 jvmtiError
2447 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2448 JavaThread* current_thread = JavaThread::current();
2449 HandleMark hm(current_thread);
2450
2451 if (java_lang_Class::is_primitive(k_mirror)) {
2452 *method_count_ptr = 0;
2453 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2454 return JVMTI_ERROR_NONE;
2455 }
2456 Klass* k = java_lang_Class::as_Klass(k_mirror);
2457 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2458
2459 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2460 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2461 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2462 }
2463
2464 if (!k->is_instance_klass()) {
2465 *method_count_ptr = 0;
2466 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2467 return JVMTI_ERROR_NONE;
2468 }
2469 instanceKlassHandle instanceK_h(current_thread, k);
2470 // Allocate the result and fill it in
2471 int result_length = instanceK_h->methods()->length();
2472 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2473 int index;
2474 bool jmethodids_found = true;
2475
2476 if (JvmtiExport::can_maintain_original_method_order()) {
2477 // Use the original method ordering indices stored in the class, so we can emit
2478 // jmethodIDs in the order they appeared in the class file
2479 for (index = 0; index < result_length; index++) {
2480 Method* m = instanceK_h->methods()->at(index);
2481 int original_index = instanceK_h->method_ordering()->at(index);
2482 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2483 jmethodID id;
2484 if (jmethodids_found) {
2485 id = m->find_jmethod_id_or_null();
2486 if (id == NULL) {
2487 // If we find an uninitialized value, make sure there is
2488 // enough space for all the uninitialized values we might
2489 // find.
2490 instanceK_h->ensure_space_for_methodids(index);
2491 jmethodids_found = false;
2492 id = m->jmethod_id();
2493 }
2494 } else {
2495 id = m->jmethod_id();
2496 }
2497 result_list[original_index] = id;
2498 }
2499 } else {
2500 // otherwise just copy in any order
2501 for (index = 0; index < result_length; index++) {
2502 Method* m = instanceK_h->methods()->at(index);
2503 jmethodID id;
2504 if (jmethodids_found) {
2505 id = m->find_jmethod_id_or_null();
2506 if (id == NULL) {
2507 // If we find an uninitialized value, make sure there is
2508 // enough space for all the uninitialized values we might
2509 // find.
2510 instanceK_h->ensure_space_for_methodids(index);
2511 jmethodids_found = false;
2512 id = m->jmethod_id();
2513 }
2514 } else {
2515 id = m->jmethod_id();
2516 }
2517 result_list[index] = id;
2518 }
2519 }
2520 // Fill in return value.
2521 *method_count_ptr = result_length;
2522 *methods_ptr = result_list;
2523
2524 return JVMTI_ERROR_NONE;
2525 } /* end GetClassMethods */
2526
2527
2528 // k_mirror - may be primitive, this must be checked
2529 // field_count_ptr - pre-checked for NULL
2530 // fields_ptr - pre-checked for NULL
2531 jvmtiError
2532 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2533 if (java_lang_Class::is_primitive(k_mirror)) {
2534 *field_count_ptr = 0;
2535 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2536 return JVMTI_ERROR_NONE;
2537 }
2538 JavaThread* current_thread = JavaThread::current();
2539 HandleMark hm(current_thread);
2540 Klass* k = java_lang_Class::as_Klass(k_mirror);
2541 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2542
2543 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2544 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2545 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2546 }
2547
2548 if (!k->is_instance_klass()) {
2549 *field_count_ptr = 0;
2550 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2551 return JVMTI_ERROR_NONE;
2552 }
2553
2554
2555 instanceKlassHandle instanceK_h(current_thread, k);
2556
2557 int result_count = 0;
2558 // First, count the fields.
2559 FilteredFieldStream flds(instanceK_h, true, true);
2560 result_count = flds.field_count();
2561
2562 // Allocate the result and fill it in
2563 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2564 // The JVMTI spec requires fields in the order they occur in the class file,
2565 // this is the reverse order of what FieldStream hands out.
2566 int id_index = (result_count - 1);
2567
2568 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2569 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2570 instanceK_h, src_st.offset(),
2571 src_st.access_flags().is_static());
2572 }
2573 assert(id_index == -1, "just checking");
2574 // Fill in the results
2575 *field_count_ptr = result_count;
2576 *fields_ptr = result_list;
2577
2578 return JVMTI_ERROR_NONE;
2579 } /* end GetClassFields */
2580
2581
2582 // k_mirror - may be primitive, this must be checked
2583 // interface_count_ptr - pre-checked for NULL
2584 // interfaces_ptr - pre-checked for NULL
2585 jvmtiError
2586 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2587 {
2588 if (java_lang_Class::is_primitive(k_mirror)) {
2589 *interface_count_ptr = 0;
2590 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2591 return JVMTI_ERROR_NONE;
2592 }
2593 JavaThread* current_thread = JavaThread::current();
2594 HandleMark hm(current_thread);
2595 Klass* k = java_lang_Class::as_Klass(k_mirror);
2596 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2597
2598 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2599 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2600 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2601
2602 if (!k->is_instance_klass()) {
2603 *interface_count_ptr = 0;
2604 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2605 return JVMTI_ERROR_NONE;
2606 }
2607
2608 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2609 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2610 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2611 for (int i_index = 0; i_index < result_length; i_index += 1) {
2612 Klass* klass_at = interface_list->at(i_index);
2613 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2614 assert(klass_at->is_interface(), "interfaces must be interfaces");
2615 oop mirror_at = klass_at->java_mirror();
2616 Handle handle_at = Handle(current_thread, mirror_at);
2617 result_list[i_index] = (jclass) jni_reference(handle_at);
2618 }
2619 *interface_count_ptr = result_length;
2620 *interfaces_ptr = result_list;
2621 }
2622
2623 return JVMTI_ERROR_NONE;
2624 } /* end GetImplementedInterfaces */
2625
2626
2627 // k_mirror - may be primitive, this must be checked
2628 // minor_version_ptr - pre-checked for NULL
2629 // major_version_ptr - pre-checked for NULL
2630 jvmtiError
2631 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2632 if (java_lang_Class::is_primitive(k_mirror)) {
2633 return JVMTI_ERROR_ABSENT_INFORMATION;
2634 }
2635 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2636 Thread *thread = Thread::current();
2637 HandleMark hm(thread);
2638 KlassHandle klass(thread, k_oop);
2639
2640 jint status = klass->jvmti_class_status();
2641 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2642 return JVMTI_ERROR_INVALID_CLASS;
2643 }
2644 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2645 return JVMTI_ERROR_ABSENT_INFORMATION;
2646 }
2647
2648 instanceKlassHandle ik(thread, k_oop);
2649 *minor_version_ptr = ik->minor_version();
2650 *major_version_ptr = ik->major_version();
2651
2652 return JVMTI_ERROR_NONE;
2653 } /* end GetClassVersionNumbers */
2654
2655
2656 // k_mirror - may be primitive, this must be checked
2657 // constant_pool_count_ptr - pre-checked for NULL
2658 // constant_pool_byte_count_ptr - pre-checked for NULL
2659 // constant_pool_bytes_ptr - pre-checked for NULL
2660 jvmtiError
2661 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2662 if (java_lang_Class::is_primitive(k_mirror)) {
2663 return JVMTI_ERROR_ABSENT_INFORMATION;
2664 }
2665
2666 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2667 Thread *thread = Thread::current();
2668 HandleMark hm(thread);
2669 ResourceMark rm(thread);
2670 KlassHandle klass(thread, k_oop);
2671
2672 jint status = klass->jvmti_class_status();
2673 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2674 return JVMTI_ERROR_INVALID_CLASS;
2675 }
2676 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2677 return JVMTI_ERROR_ABSENT_INFORMATION;
2678 }
2679
2680 instanceKlassHandle ikh(thread, k_oop);
2681 JvmtiConstantPoolReconstituter reconstituter(ikh);
2682 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2683 return reconstituter.get_error();
2684 }
2685
2686 unsigned char *cpool_bytes;
2687 int cpool_size = reconstituter.cpool_size();
2688 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2689 return reconstituter.get_error();
2690 }
2691 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2692 if (res != JVMTI_ERROR_NONE) {
2693 return res;
2694 }
2695 reconstituter.copy_cpool_bytes(cpool_bytes);
2696 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2697 return reconstituter.get_error();
2698 }
2699
2700 constantPoolHandle constants(thread, ikh->constants());
2701 *constant_pool_count_ptr = constants->length();
2702 *constant_pool_byte_count_ptr = cpool_size;
2703 *constant_pool_bytes_ptr = cpool_bytes;
2704
2705 return JVMTI_ERROR_NONE;
2706 } /* end GetConstantPool */
2707
2708
2709 // k_mirror - may be primitive, this must be checked
2710 // is_interface_ptr - pre-checked for NULL
2711 jvmtiError
2712 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2713 {
2714 bool result = false;
2715 if (!java_lang_Class::is_primitive(k_mirror)) {
2716 Klass* k = java_lang_Class::as_Klass(k_mirror);
2717 if (k != NULL && k->is_interface()) {
2718 result = true;
2719 }
2720 }
2721 *is_interface_ptr = result;
2722 }
2723
2724 return JVMTI_ERROR_NONE;
2725 } /* end IsInterface */
2726
2727
2728 // k_mirror - may be primitive, this must be checked
2729 // is_array_class_ptr - pre-checked for NULL
2730 jvmtiError
2731 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2732 {
2733 bool result = false;
2734 if (!java_lang_Class::is_primitive(k_mirror)) {
2735 Klass* k = java_lang_Class::as_Klass(k_mirror);
2736 if (k != NULL && k->is_array_klass()) {
2737 result = true;
2738 }
2739 }
2740 *is_array_class_ptr = result;
2741 }
2742
2743 return JVMTI_ERROR_NONE;
2744 } /* end IsArrayClass */
2745
2746
2747 // k_mirror - may be primitive, this must be checked
2748 // classloader_ptr - pre-checked for NULL
2749 jvmtiError
2750 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2751 {
2752 if (java_lang_Class::is_primitive(k_mirror)) {
2753 *classloader_ptr = (jclass) jni_reference(Handle());
2754 return JVMTI_ERROR_NONE;
2755 }
2756 JavaThread* current_thread = JavaThread::current();
2757 HandleMark hm(current_thread);
2758 Klass* k = java_lang_Class::as_Klass(k_mirror);
2759 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2760
2761 oop result_oop = k->class_loader();
2762 if (result_oop == NULL) {
2763 *classloader_ptr = (jclass) jni_reference(Handle());
2764 return JVMTI_ERROR_NONE;
2765 }
2766 Handle result_handle = Handle(current_thread, result_oop);
2767 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2768 *classloader_ptr = result_jnihandle;
2769 }
2770 return JVMTI_ERROR_NONE;
2771 } /* end GetClassLoader */
2772
2773
2774 // k_mirror - may be primitive, this must be checked
2775 // source_debug_extension_ptr - pre-checked for NULL
2776 jvmtiError
2777 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2778 {
2779 if (java_lang_Class::is_primitive(k_mirror)) {
2780 return JVMTI_ERROR_ABSENT_INFORMATION;
2781 }
2782 Klass* k = java_lang_Class::as_Klass(k_mirror);
2783 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2784 if (!k->is_instance_klass()) {
2785 return JVMTI_ERROR_ABSENT_INFORMATION;
2786 }
2787 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2788 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2789
2790 {
2791 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2792 strcpy(*source_debug_extension_ptr, sde);
2793 }
2794 }
2795
2796 return JVMTI_ERROR_NONE;
2797 } /* end GetSourceDebugExtension */
2798
2799 //
2800 // Object functions
2801 //
2802
2803 // hash_code_ptr - pre-checked for NULL
2804 jvmtiError
2805 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2806 oop mirror = JNIHandles::resolve_external_guard(object);
2807 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2808 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2809
2810 {
2811 jint result = (jint) mirror->identity_hash();
2812 *hash_code_ptr = result;
2813 }
2814 return JVMTI_ERROR_NONE;
2815 } /* end GetObjectHashCode */
2816
2817
2818 // info_ptr - pre-checked for NULL
2819 jvmtiError
2820 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2821 JavaThread* calling_thread = JavaThread::current();
2822 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2823 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2824 // Some of the critical threads were not suspended. go to a safepoint and try again
2825 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2826 VMThread::execute(&op);
2827 err = op.result();
2828 }
2829 return err;
2830 } /* end GetObjectMonitorUsage */
2831
2832
2833 //
2834 // Field functions
2835 //
2836
2837 // name_ptr - NULL is a valid value, must be checked
2838 // signature_ptr - NULL is a valid value, must be checked
2839 // generic_ptr - NULL is a valid value, must be checked
2840 jvmtiError
2841 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2842 JavaThread* current_thread = JavaThread::current();
2843 ResourceMark rm(current_thread);
2844 if (name_ptr == NULL) {
2845 // just don't return the name
2846 } else {
2847 const char* fieldName = fdesc_ptr->name()->as_C_string();
2848 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2849 if (*name_ptr == NULL)
2850 return JVMTI_ERROR_OUT_OF_MEMORY;
2851 strcpy(*name_ptr, fieldName);
2852 }
2853 if (signature_ptr== NULL) {
2854 // just don't return the signature
2855 } else {
2856 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2857 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2858 if (*signature_ptr == NULL)
2859 return JVMTI_ERROR_OUT_OF_MEMORY;
2860 strcpy(*signature_ptr, fieldSignature);
2861 }
2862 if (generic_ptr != NULL) {
2863 *generic_ptr = NULL;
2864 Symbol* soop = fdesc_ptr->generic_signature();
2865 if (soop != NULL) {
2866 const char* gen_sig = soop->as_C_string();
2867 if (gen_sig != NULL) {
2868 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2869 if (err != JVMTI_ERROR_NONE) {
2870 return err;
2871 }
2872 strcpy(*generic_ptr, gen_sig);
2873 }
2874 }
2875 }
2876 return JVMTI_ERROR_NONE;
2877 } /* end GetFieldName */
2878
2879
2880 // declaring_class_ptr - pre-checked for NULL
2881 jvmtiError
2882 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2883
2884 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2885 return JVMTI_ERROR_NONE;
2886 } /* end GetFieldDeclaringClass */
2887
2888
2889 // modifiers_ptr - pre-checked for NULL
2890 jvmtiError
2891 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2892
2893 AccessFlags resultFlags = fdesc_ptr->access_flags();
2894 jint result = resultFlags.as_int();
2895 *modifiers_ptr = result;
2896
2897 return JVMTI_ERROR_NONE;
2898 } /* end GetFieldModifiers */
2899
2900
2901 // is_synthetic_ptr - pre-checked for NULL
2902 jvmtiError
2903 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2904 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2905 return JVMTI_ERROR_NONE;
2906 } /* end IsFieldSynthetic */
2907
2908
2909 //
2910 // Method functions
2911 //
2912
2913 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2914 // name_ptr - NULL is a valid value, must be checked
2915 // signature_ptr - NULL is a valid value, must be checked
2916 // generic_ptr - NULL is a valid value, must be checked
2917 jvmtiError
2918 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2919 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2920 JavaThread* current_thread = JavaThread::current();
2921
2922 ResourceMark rm(current_thread); // get the utf8 name and signature
2923 if (name_ptr == NULL) {
2924 // just don't return the name
2925 } else {
2926 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2927 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2928 strcpy(*name_ptr, utf8_name);
2929 }
2930 if (signature_ptr == NULL) {
2931 // just don't return the signature
2932 } else {
2933 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2934 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2935 strcpy(*signature_ptr, utf8_signature);
2936 }
2937
2938 if (generic_ptr != NULL) {
2939 *generic_ptr = NULL;
2940 Symbol* soop = method_oop->generic_signature();
2941 if (soop != NULL) {
2942 const char* gen_sig = soop->as_C_string();
2943 if (gen_sig != NULL) {
2944 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2945 if (err != JVMTI_ERROR_NONE) {
2946 return err;
2947 }
2948 strcpy(*generic_ptr, gen_sig);
2949 }
2950 }
2951 }
2952 return JVMTI_ERROR_NONE;
2953 } /* end GetMethodName */
2954
2955
2956 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2957 // declaring_class_ptr - pre-checked for NULL
2958 jvmtiError
2959 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2960 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2961 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2962 return JVMTI_ERROR_NONE;
2963 } /* end GetMethodDeclaringClass */
2964
2965
2966 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2967 // modifiers_ptr - pre-checked for NULL
2968 jvmtiError
2969 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2970 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2971 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2972 return JVMTI_ERROR_NONE;
2973 } /* end GetMethodModifiers */
2974
2975
2976 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2977 // max_ptr - pre-checked for NULL
2978 jvmtiError
2979 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2980 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2981 // get max stack
2982 (*max_ptr) = method_oop->max_locals();
2983 return JVMTI_ERROR_NONE;
2984 } /* end GetMaxLocals */
2985
2986
2987 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2988 // size_ptr - pre-checked for NULL
2989 jvmtiError
2990 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2991 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2992 // get size of arguments
2993
2994 (*size_ptr) = method_oop->size_of_parameters();
2995 return JVMTI_ERROR_NONE;
2996 } /* end GetArgumentsSize */
2997
2998
2999 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3000 // entry_count_ptr - pre-checked for NULL
3001 // table_ptr - pre-checked for NULL
3002 jvmtiError
3003 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3004 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3005 if (!method_oop->has_linenumber_table()) {
3006 return (JVMTI_ERROR_ABSENT_INFORMATION);
3007 }
3008
3009 // The line number table is compressed so we don't know how big it is until decompressed.
3010 // Decompression is really fast so we just do it twice.
3011
3012 // Compute size of table
3013 jint num_entries = 0;
3014 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3015 while (stream.read_pair()) {
3016 num_entries++;
3017 }
3018 jvmtiLineNumberEntry *jvmti_table =
3019 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3020
3021 // Fill jvmti table
3022 if (num_entries > 0) {
3023 int index = 0;
3024 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3025 while (stream.read_pair()) {
3026 jvmti_table[index].start_location = (jlocation) stream.bci();
3027 jvmti_table[index].line_number = (jint) stream.line();
3028 index++;
3029 }
3030 assert(index == num_entries, "sanity check");
3031 }
3032
3033 // Set up results
3034 (*entry_count_ptr) = num_entries;
3035 (*table_ptr) = jvmti_table;
3036
3037 return JVMTI_ERROR_NONE;
3038 } /* end GetLineNumberTable */
3039
3040
3041 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3042 // start_location_ptr - pre-checked for NULL
3043 // end_location_ptr - pre-checked for NULL
3044 jvmtiError
3045 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3046
3047 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3048 // get start and end location
3049 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3050 if (method_oop->code_size() == 0) {
3051 // there is no code so there is no start location
3052 (*start_location_ptr) = (jlocation)(-1);
3053 } else {
3054 (*start_location_ptr) = (jlocation)(0);
3055 }
3056
3057 return JVMTI_ERROR_NONE;
3058 } /* end GetMethodLocation */
3059
3060
3061 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3062 // entry_count_ptr - pre-checked for NULL
3063 // table_ptr - pre-checked for NULL
3064 jvmtiError
3065 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3066
3067 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3068 JavaThread* current_thread = JavaThread::current();
3069
3070 // does the klass have any local variable information?
3071 InstanceKlass* ik = method_oop->method_holder();
3072 if (!ik->access_flags().has_localvariable_table()) {
3073 return (JVMTI_ERROR_ABSENT_INFORMATION);
3074 }
3075
3076 ConstantPool* constants = method_oop->constants();
3077 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3078
3079 // in the vm localvariable table representation, 6 consecutive elements in the table
3080 // represent a 6-tuple of shorts
3081 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3082 jint num_entries = method_oop->localvariable_table_length();
3083 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3084 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3085
3086 if (num_entries > 0) {
3087 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3088 for (int i = 0; i < num_entries; i++) {
3089 // get the 5 tuple information from the vm table
3090 jlocation start_location = (jlocation) table[i].start_bci;
3091 jint length = (jint) table[i].length;
3092 int name_index = (int) table[i].name_cp_index;
3093 int signature_index = (int) table[i].descriptor_cp_index;
3094 int generic_signature_index = (int) table[i].signature_cp_index;
3095 jint slot = (jint) table[i].slot;
3096
3097 // get utf8 name and signature
3098 char *name_buf = NULL;
3099 char *sig_buf = NULL;
3100 char *gen_sig_buf = NULL;
3101 {
3102 ResourceMark rm(current_thread);
3103
3104 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3105 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3106 strcpy(name_buf, utf8_name);
3107
3108 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3109 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3110 strcpy(sig_buf, utf8_signature);
3111
3112 if (generic_signature_index > 0) {
3113 const char *utf8_gen_sign = (const char *)
3114 constants->symbol_at(generic_signature_index)->as_utf8();
3115 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3116 strcpy(gen_sig_buf, utf8_gen_sign);
3117 }
3118 }
3119
3120 // fill in the jvmti local variable table
3121 jvmti_table[i].start_location = start_location;
3122 jvmti_table[i].length = length;
3123 jvmti_table[i].name = name_buf;
3124 jvmti_table[i].signature = sig_buf;
3125 jvmti_table[i].generic_signature = gen_sig_buf;
3126 jvmti_table[i].slot = slot;
3127 }
3128 }
3129
3130 // set results
3131 (*entry_count_ptr) = num_entries;
3132 (*table_ptr) = jvmti_table;
3133
3134 return JVMTI_ERROR_NONE;
3135 } /* end GetLocalVariableTable */
3136
3137
3138 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3139 // bytecode_count_ptr - pre-checked for NULL
3140 // bytecodes_ptr - pre-checked for NULL
3141 jvmtiError
3142 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3143 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3144
3145 HandleMark hm;
3146 methodHandle method(method_oop);
3147 jint size = (jint)method->code_size();
3148 jvmtiError err = allocate(size, bytecodes_ptr);
3149 if (err != JVMTI_ERROR_NONE) {
3150 return err;
3151 }
3152
3153 (*bytecode_count_ptr) = size;
3154 // get byte codes
3155 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3156
3157 return JVMTI_ERROR_NONE;
3158 } /* end GetBytecodes */
3159
3160
3161 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3162 // is_native_ptr - pre-checked for NULL
3163 jvmtiError
3164 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3165 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3166 (*is_native_ptr) = method_oop->is_native();
3167 return JVMTI_ERROR_NONE;
3168 } /* end IsMethodNative */
3169
3170
3171 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3172 // is_synthetic_ptr - pre-checked for NULL
3173 jvmtiError
3174 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3175 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3176 (*is_synthetic_ptr) = method_oop->is_synthetic();
3177 return JVMTI_ERROR_NONE;
3178 } /* end IsMethodSynthetic */
3179
3180
3181 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3182 // is_obsolete_ptr - pre-checked for NULL
3183 jvmtiError
3184 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3185 if (use_version_1_0_semantics() &&
3186 get_capabilities()->can_redefine_classes == 0) {
3187 // This JvmtiEnv requested version 1.0 semantics and this function
3188 // requires the can_redefine_classes capability in version 1.0 so
3189 // we need to return an error here.
3190 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3191 }
3192
3193 if (method_oop == NULL || method_oop->is_obsolete()) {
3194 *is_obsolete_ptr = true;
3195 } else {
3196 *is_obsolete_ptr = false;
3197 }
3198 return JVMTI_ERROR_NONE;
3199 } /* end IsMethodObsolete */
3200
3201 //
3202 // Raw Monitor functions
3203 //
3204
3205 // name - pre-checked for NULL
3206 // monitor_ptr - pre-checked for NULL
3207 jvmtiError
3208 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3209 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3210 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3211
3212 *monitor_ptr = (jrawMonitorID)rmonitor;
3213
3214 return JVMTI_ERROR_NONE;
3215 } /* end CreateRawMonitor */
3216
3217
3218 // rmonitor - pre-checked for validity
3219 jvmtiError
3220 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3221 if (Threads::number_of_threads() == 0) {
3222 // Remove this monitor from pending raw monitors list
3223 // if it has entered in onload or start phase.
3224 JvmtiPendingMonitors::destroy(rmonitor);
3225 } else {
3226 Thread* thread = Thread::current();
3227 if (rmonitor->is_entered(thread)) {
3228 // The caller owns this monitor which we are about to destroy.
3229 // We exit the underlying synchronization object so that the
3230 // "delete monitor" call below can work without an assertion
3231 // failure on systems that don't like destroying synchronization
3232 // objects that are locked.
3233 int r;
3234 intptr_t recursion = rmonitor->recursions();
3235 for (intptr_t i=0; i <= recursion; i++) {
3236 r = rmonitor->raw_exit(thread);
3237 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3238 if (r != ObjectMonitor::OM_OK) { // robustness
3239 return JVMTI_ERROR_INTERNAL;
3240 }
3241 }
3242 }
3243 if (rmonitor->owner() != NULL) {
3244 // The caller is trying to destroy a monitor that is locked by
3245 // someone else. While this is not forbidden by the JVMTI
3246 // spec, it will cause an assertion failure on systems that don't
3247 // like destroying synchronization objects that are locked.
3248 // We indicate a problem with the error return (and leak the
3249 // monitor's memory).
3250 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3251 }
3252 }
3253
3254 delete rmonitor;
3255
3256 return JVMTI_ERROR_NONE;
3257 } /* end DestroyRawMonitor */
3258
3259
3260 // rmonitor - pre-checked for validity
3261 jvmtiError
3262 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3263 if (Threads::number_of_threads() == 0) {
3264 // No JavaThreads exist so ObjectMonitor enter cannot be
3265 // used, add this raw monitor to the pending list.
3266 // The pending monitors will be actually entered when
3267 // the VM is setup.
3268 // See transition_pending_raw_monitors in create_vm()
3269 // in thread.cpp.
3270 JvmtiPendingMonitors::enter(rmonitor);
3271 } else {
3272 int r = 0;
3273 Thread* thread = Thread::current();
3274
3275 if (thread->is_Java_thread()) {
3276 JavaThread* current_thread = (JavaThread*)thread;
3277
3278 #ifdef PROPER_TRANSITIONS
3279 // Not really unknown but ThreadInVMfromNative does more than we want
3280 ThreadInVMfromUnknown __tiv;
3281 {
3282 ThreadBlockInVM __tbivm(current_thread);
3283 r = rmonitor->raw_enter(current_thread);
3284 }
3285 #else
3286 /* Transition to thread_blocked without entering vm state */
3287 /* This is really evil. Normally you can't undo _thread_blocked */
3288 /* transitions like this because it would cause us to miss a */
3289 /* safepoint but since the thread was already in _thread_in_native */
3290 /* the thread is not leaving a safepoint safe state and it will */
3291 /* block when it tries to return from native. We can't safepoint */
3292 /* block in here because we could deadlock the vmthread. Blech. */
3293
3294 JavaThreadState state = current_thread->thread_state();
3295 assert(state == _thread_in_native, "Must be _thread_in_native");
3296 // frame should already be walkable since we are in native
3297 assert(!current_thread->has_last_Java_frame() ||
3298 current_thread->frame_anchor()->walkable(), "Must be walkable");
3299 current_thread->set_thread_state(_thread_blocked);
3300
3301 r = rmonitor->raw_enter(current_thread);
3302 // restore state, still at a safepoint safe state
3303 current_thread->set_thread_state(state);
3304
3305 #endif /* PROPER_TRANSITIONS */
3306 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3307 } else {
3308 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3309 r = rmonitor->raw_enter(thread);
3310 } else {
3311 ShouldNotReachHere();
3312 }
3313 }
3314
3315 if (r != ObjectMonitor::OM_OK) { // robustness
3316 return JVMTI_ERROR_INTERNAL;
3317 }
3318 }
3319 return JVMTI_ERROR_NONE;
3320 } /* end RawMonitorEnter */
3321
3322
3323 // rmonitor - pre-checked for validity
3324 jvmtiError
3325 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3326 jvmtiError err = JVMTI_ERROR_NONE;
3327
3328 if (Threads::number_of_threads() == 0) {
3329 // No JavaThreads exist so just remove this monitor from the pending list.
3330 // Bool value from exit is false if rmonitor is not in the list.
3331 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3332 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3333 }
3334 } else {
3335 int r = 0;
3336 Thread* thread = Thread::current();
3337
3338 if (thread->is_Java_thread()) {
3339 JavaThread* current_thread = (JavaThread*)thread;
3340 #ifdef PROPER_TRANSITIONS
3341 // Not really unknown but ThreadInVMfromNative does more than we want
3342 ThreadInVMfromUnknown __tiv;
3343 #endif /* PROPER_TRANSITIONS */
3344 r = rmonitor->raw_exit(current_thread);
3345 } else {
3346 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3347 r = rmonitor->raw_exit(thread);
3348 } else {
3349 ShouldNotReachHere();
3350 }
3351 }
3352
3353 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3354 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3355 } else {
3356 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3357 if (r != ObjectMonitor::OM_OK) { // robustness
3358 err = JVMTI_ERROR_INTERNAL;
3359 }
3360 }
3361 }
3362 return err;
3363 } /* end RawMonitorExit */
3364
3365
3366 // rmonitor - pre-checked for validity
3367 jvmtiError
3368 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3369 int r = 0;
3370 Thread* thread = Thread::current();
3371
3372 if (thread->is_Java_thread()) {
3373 JavaThread* current_thread = (JavaThread*)thread;
3374 #ifdef PROPER_TRANSITIONS
3375 // Not really unknown but ThreadInVMfromNative does more than we want
3376 ThreadInVMfromUnknown __tiv;
3377 {
3378 ThreadBlockInVM __tbivm(current_thread);
3379 r = rmonitor->raw_wait(millis, true, current_thread);
3380 }
3381 #else
3382 /* Transition to thread_blocked without entering vm state */
3383 /* This is really evil. Normally you can't undo _thread_blocked */
3384 /* transitions like this because it would cause us to miss a */
3385 /* safepoint but since the thread was already in _thread_in_native */
3386 /* the thread is not leaving a safepoint safe state and it will */
3387 /* block when it tries to return from native. We can't safepoint */
3388 /* block in here because we could deadlock the vmthread. Blech. */
3389
3390 JavaThreadState state = current_thread->thread_state();
3391 assert(state == _thread_in_native, "Must be _thread_in_native");
3392 // frame should already be walkable since we are in native
3393 assert(!current_thread->has_last_Java_frame() ||
3394 current_thread->frame_anchor()->walkable(), "Must be walkable");
3395 current_thread->set_thread_state(_thread_blocked);
3396
3397 r = rmonitor->raw_wait(millis, true, current_thread);
3398 // restore state, still at a safepoint safe state
3399 current_thread->set_thread_state(state);
3400
3401 #endif /* PROPER_TRANSITIONS */
3402 } else {
3403 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3404 r = rmonitor->raw_wait(millis, true, thread);
3405 } else {
3406 ShouldNotReachHere();
3407 }
3408 }
3409
3410 switch (r) {
3411 case ObjectMonitor::OM_INTERRUPTED:
3412 return JVMTI_ERROR_INTERRUPT;
3413 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3414 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3415 }
3416 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3417 if (r != ObjectMonitor::OM_OK) { // robustness
3418 return JVMTI_ERROR_INTERNAL;
3419 }
3420
3421 return JVMTI_ERROR_NONE;
3422 } /* end RawMonitorWait */
3423
3424
3425 // rmonitor - pre-checked for validity
3426 jvmtiError
3427 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3428 int r = 0;
3429 Thread* thread = Thread::current();
3430
3431 if (thread->is_Java_thread()) {
3432 JavaThread* current_thread = (JavaThread*)thread;
3433 // Not really unknown but ThreadInVMfromNative does more than we want
3434 ThreadInVMfromUnknown __tiv;
3435 r = rmonitor->raw_notify(current_thread);
3436 } else {
3437 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3438 r = rmonitor->raw_notify(thread);
3439 } else {
3440 ShouldNotReachHere();
3441 }
3442 }
3443
3444 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3445 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3446 }
3447 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3448 if (r != ObjectMonitor::OM_OK) { // robustness
3449 return JVMTI_ERROR_INTERNAL;
3450 }
3451
3452 return JVMTI_ERROR_NONE;
3453 } /* end RawMonitorNotify */
3454
3455
3456 // rmonitor - pre-checked for validity
3457 jvmtiError
3458 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3459 int r = 0;
3460 Thread* thread = Thread::current();
3461
3462 if (thread->is_Java_thread()) {
3463 JavaThread* current_thread = (JavaThread*)thread;
3464 ThreadInVMfromUnknown __tiv;
3465 r = rmonitor->raw_notifyAll(current_thread);
3466 } else {
3467 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3468 r = rmonitor->raw_notifyAll(thread);
3469 } else {
3470 ShouldNotReachHere();
3471 }
3472 }
3473
3474 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3475 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3476 }
3477 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3478 if (r != ObjectMonitor::OM_OK) { // robustness
3479 return JVMTI_ERROR_INTERNAL;
3480 }
3481
3482 return JVMTI_ERROR_NONE;
3483 } /* end RawMonitorNotifyAll */
3484
3485
3486 //
3487 // JNI Function Interception functions
3488 //
3489
3490
3491 // function_table - pre-checked for NULL
3492 jvmtiError
3493 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3494 // Copy jni function table at safepoint.
3495 VM_JNIFunctionTableCopier copier(function_table);
3496 VMThread::execute(&copier);
3497
3498 return JVMTI_ERROR_NONE;
3499 } /* end SetJNIFunctionTable */
3500
3501
3502 // function_table - pre-checked for NULL
3503 jvmtiError
3504 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3505 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3506 if (*function_table == NULL)
3507 return JVMTI_ERROR_OUT_OF_MEMORY;
3508 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3509 return JVMTI_ERROR_NONE;
3510 } /* end GetJNIFunctionTable */
3511
3512
3513 //
3514 // Event Management functions
3515 //
3516
3517 jvmtiError
3518 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3519 // can only generate two event types
3520 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3521 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3522 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3523 }
3524
3525 // for compiled_method_load events we must check that the environment
3526 // has the can_generate_compiled_method_load_events capability.
3527 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3528 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3529 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3530 }
3531 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3532 } else {
3533 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3534 }
3535
3536 } /* end GenerateEvents */
3537
3538
3539 //
3540 // Extension Mechanism functions
3541 //
3542
3543 // extension_count_ptr - pre-checked for NULL
3544 // extensions - pre-checked for NULL
3545 jvmtiError
3546 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3547 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3548 } /* end GetExtensionFunctions */
3549
3550
3551 // extension_count_ptr - pre-checked for NULL
3552 // extensions - pre-checked for NULL
3553 jvmtiError
3554 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3555 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3556 } /* end GetExtensionEvents */
3557
3558
3559 // callback - NULL is a valid value, must be checked
3560 jvmtiError
3561 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3562 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3563 } /* end SetExtensionEventCallback */
3564
3565 //
3566 // Timers functions
3567 //
3568
3569 // info_ptr - pre-checked for NULL
3570 jvmtiError
3571 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3572 os::current_thread_cpu_time_info(info_ptr);
3573 return JVMTI_ERROR_NONE;
3574 } /* end GetCurrentThreadCpuTimerInfo */
3575
3576
3577 // nanos_ptr - pre-checked for NULL
3578 jvmtiError
3579 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3580 *nanos_ptr = os::current_thread_cpu_time();
3581 return JVMTI_ERROR_NONE;
3582 } /* end GetCurrentThreadCpuTime */
3583
3584
3585 // info_ptr - pre-checked for NULL
3586 jvmtiError
3587 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3588 os::thread_cpu_time_info(info_ptr);
3589 return JVMTI_ERROR_NONE;
3590 } /* end GetThreadCpuTimerInfo */
3591
3592
3593 // Threads_lock NOT held, java_thread not protected by lock
3594 // java_thread - pre-checked
3595 // nanos_ptr - pre-checked for NULL
3596 jvmtiError
3597 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3598 *nanos_ptr = os::thread_cpu_time(java_thread);
3599 return JVMTI_ERROR_NONE;
3600 } /* end GetThreadCpuTime */
3601
3602
3603 // info_ptr - pre-checked for NULL
3604 jvmtiError
3605 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3606 os::javaTimeNanos_info(info_ptr);
3607 return JVMTI_ERROR_NONE;
3608 } /* end GetTimerInfo */
3609
3610
3611 // nanos_ptr - pre-checked for NULL
3612 jvmtiError
3613 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3614 *nanos_ptr = os::javaTimeNanos();
3615 return JVMTI_ERROR_NONE;
3616 } /* end GetTime */
3617
3618
3619 // processor_count_ptr - pre-checked for NULL
3620 jvmtiError
3621 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3622 *processor_count_ptr = os::active_processor_count();
3623 return JVMTI_ERROR_NONE;
3624 } /* end GetAvailableProcessors */
3625
3626 //
3627 // System Properties functions
3628 //
3629
3630 // count_ptr - pre-checked for NULL
3631 // property_ptr - pre-checked for NULL
3632 jvmtiError
3633 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3634 jvmtiError err = JVMTI_ERROR_NONE;
3635
3636 // Get the number of readable properties.
3637 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3638
3639 // Allocate memory to hold the exact number of readable properties.
3640 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3641 if (err != JVMTI_ERROR_NONE) {
3642 return err;
3643 }
3644 int readable_count = 0;
3645 // Loop through the system properties until all the readable properties are found.
3646 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3647 if (p->is_readable()) {
3648 const char *key = p->key();
3649 char **tmp_value = *property_ptr+readable_count;
3650 readable_count++;
3651 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3652 if (err == JVMTI_ERROR_NONE) {
3653 strcpy(*tmp_value, key);
3654 } else {
3655 // clean up previously allocated memory.
3656 for (int j=0; j<readable_count; j++) {
3657 Deallocate((unsigned char*)*property_ptr+j);
3658 }
3659 Deallocate((unsigned char*)property_ptr);
3660 break;
3661 }
3662 }
3663 }
3664 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3665 return err;
3666 } /* end GetSystemProperties */
3667
3668
3669 // property - pre-checked for NULL
3670 // value_ptr - pre-checked for NULL
3671 jvmtiError
3672 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3673 jvmtiError err = JVMTI_ERROR_NONE;
3674 const char *value;
3675
3676 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3677 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3678 if (value == NULL) {
3679 err = JVMTI_ERROR_NOT_AVAILABLE;
3680 } else {
3681 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3682 if (err == JVMTI_ERROR_NONE) {
3683 strcpy(*value_ptr, value);
3684 }
3685 }
3686 return err;
3687 } /* end GetSystemProperty */
3688
3689
3690 // property - pre-checked for NULL
3691 // value - NULL is a valid value, must be checked
3692 jvmtiError
3693 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3694 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3695
3696 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3697 if (strcmp(property, p->key()) == 0) {
3698 if (p->set_writeable_value(value_ptr)) {
3699 err = JVMTI_ERROR_NONE;
3700 }
3701 }
3702 }
3703 return err;
3704 } /* end SetSystemProperty */