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