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