Wed, 31 Jan 2018 19:24:57 -0500
8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed
1 /*
2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "interpreter/bytecodeStream.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "memory/universe.inline.hpp"
34 #include "oops/instanceKlass.hpp"
35 #include "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/thread.inline.hpp"
58 #include "runtime/vframe.hpp"
59 #include "runtime/vmThread.hpp"
60 #include "services/threadService.hpp"
61 #include "utilities/exceptions.hpp"
62 #include "utilities/preserveException.hpp"
65 #define FIXLATER 0 // REMOVE this when completed.
67 // FIXLATER: hook into JvmtiTrace
68 #define TraceJVMTICalls false
70 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
71 }
73 JvmtiEnv::~JvmtiEnv() {
74 }
76 JvmtiEnv*
77 JvmtiEnv::create_a_jvmti(jint version) {
78 return new JvmtiEnv(version);
79 }
81 // VM operation class to copy jni function table at safepoint.
82 // More than one java threads or jvmti agents may be reading/
83 // modifying jni function tables. To reduce the risk of bad
84 // interaction b/w these threads it is copied at safepoint.
85 class VM_JNIFunctionTableCopier : public VM_Operation {
86 private:
87 const struct JNINativeInterface_ *_function_table;
88 public:
89 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
90 _function_table = func_tbl;
91 };
93 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
94 void doit() {
95 copy_jni_function_table(_function_table);
96 };
97 };
99 //
100 // Do not change the "prefix" marker below, everything above it is copied
101 // unchanged into the filled stub, everything below is controlled by the
102 // stub filler (only method bodies are carried forward, and then only for
103 // functionality still in the spec).
104 //
105 // end file prefix
107 //
108 // Memory Management functions
109 //
111 // mem_ptr - pre-checked for NULL
112 jvmtiError
113 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
114 return allocate(size, mem_ptr);
115 } /* end Allocate */
118 // mem - NULL is a valid value, must be checked
119 jvmtiError
120 JvmtiEnv::Deallocate(unsigned char* mem) {
121 return deallocate(mem);
122 } /* end Deallocate */
124 // Threads_lock NOT held, java_thread not protected by lock
125 // java_thread - pre-checked
126 // data - NULL is a valid value, must be checked
127 jvmtiError
128 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
129 JvmtiThreadState* state = java_thread->jvmti_thread_state();
130 if (state == NULL) {
131 if (data == NULL) {
132 // leaving state unset same as data set to NULL
133 return JVMTI_ERROR_NONE;
134 }
135 // otherwise, create the state
136 state = JvmtiThreadState::state_for(java_thread);
137 if (state == NULL) {
138 return JVMTI_ERROR_THREAD_NOT_ALIVE;
139 }
140 }
141 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
142 return JVMTI_ERROR_NONE;
143 } /* end SetThreadLocalStorage */
146 // Threads_lock NOT held
147 // thread - NOT pre-checked
148 // data_ptr - pre-checked for NULL
149 jvmtiError
150 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
151 JavaThread* current_thread = JavaThread::current();
152 if (thread == NULL) {
153 JvmtiThreadState* state = current_thread->jvmti_thread_state();
154 *data_ptr = (state == NULL) ? NULL :
155 state->env_thread_state(this)->get_agent_thread_local_storage_data();
156 } else {
158 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
159 // the thread to _thread_in_vm. However, when the TLS for a thread
160 // other than the current thread is required we need to transition
161 // from native so as to resolve the jthread.
163 ThreadInVMfromNative __tiv(current_thread);
164 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
165 debug_only(VMNativeEntryWrapper __vew;)
167 oop thread_oop = JNIHandles::resolve_external_guard(thread);
168 if (thread_oop == NULL) {
169 return JVMTI_ERROR_INVALID_THREAD;
170 }
171 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
172 return JVMTI_ERROR_INVALID_THREAD;
173 }
174 JavaThread* java_thread = java_lang_Thread::thread(thread_oop);
175 if (java_thread == NULL) {
176 return JVMTI_ERROR_THREAD_NOT_ALIVE;
177 }
178 JvmtiThreadState* state = java_thread->jvmti_thread_state();
179 *data_ptr = (state == NULL) ? NULL :
180 state->env_thread_state(this)->get_agent_thread_local_storage_data();
181 }
182 return JVMTI_ERROR_NONE;
183 } /* end GetThreadLocalStorage */
185 //
186 // Class functions
187 //
189 // class_count_ptr - pre-checked for NULL
190 // classes_ptr - pre-checked for NULL
191 jvmtiError
192 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
193 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
194 } /* end GetLoadedClasses */
197 // initiating_loader - NULL is a valid value, must be checked
198 // class_count_ptr - pre-checked for NULL
199 // classes_ptr - pre-checked for NULL
200 jvmtiError
201 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
202 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
203 class_count_ptr, classes_ptr);
204 } /* end GetClassLoaderClasses */
206 // k_mirror - may be primitive, this must be checked
207 // is_modifiable_class_ptr - pre-checked for NULL
208 jvmtiError
209 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
210 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
211 JNI_TRUE : JNI_FALSE;
212 return JVMTI_ERROR_NONE;
213 } /* end IsModifiableClass */
215 // class_count - pre-checked to be greater than or equal to 0
216 // classes - pre-checked for NULL
217 jvmtiError
218 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
219 //TODO: add locking
221 int index;
222 JavaThread* current_thread = JavaThread::current();
223 ResourceMark rm(current_thread);
225 jvmtiClassDefinition* class_definitions =
226 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
227 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
229 for (index = 0; index < class_count; index++) {
230 HandleMark hm(current_thread);
232 jclass jcls = classes[index];
233 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
234 if (k_mirror == NULL) {
235 return JVMTI_ERROR_INVALID_CLASS;
236 }
237 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
238 return JVMTI_ERROR_INVALID_CLASS;
239 }
241 if (java_lang_Class::is_primitive(k_mirror)) {
242 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
243 }
245 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
246 KlassHandle klass(current_thread, k_oop);
248 jint status = klass->jvmti_class_status();
249 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
250 return JVMTI_ERROR_INVALID_CLASS;
251 }
252 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
253 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
254 }
256 instanceKlassHandle ikh(current_thread, k_oop);
257 if (ikh->get_cached_class_file_bytes() == NULL) {
258 // Not cached, we need to reconstitute the class file from the
259 // VM representation. We don't attach the reconstituted class
260 // bytes to the InstanceKlass here because they have not been
261 // validated and we're not at a safepoint.
262 constantPoolHandle constants(current_thread, ikh->constants());
263 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
265 JvmtiClassFileReconstituter reconstituter(ikh);
266 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
267 return reconstituter.get_error();
268 }
270 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
271 class_definitions[index].class_bytes = (unsigned char*)
272 reconstituter.class_file_bytes();
273 } else {
274 // it is cached, get it from the cache
275 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len();
276 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes();
277 }
278 class_definitions[index].klass = jcls;
279 }
280 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
281 VMThread::execute(&op);
282 return (op.check_error());
283 } /* end RetransformClasses */
286 // class_count - pre-checked to be greater than or equal to 0
287 // class_definitions - pre-checked for NULL
288 jvmtiError
289 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
290 //TODO: add locking
291 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
292 VMThread::execute(&op);
293 return (op.check_error());
294 } /* end RedefineClasses */
297 //
298 // Object functions
299 //
301 // size_ptr - pre-checked for NULL
302 jvmtiError
303 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
304 oop mirror = JNIHandles::resolve_external_guard(object);
305 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
307 if (mirror->klass() == SystemDictionary::Class_klass() &&
308 !java_lang_Class::is_primitive(mirror)) {
309 Klass* k = java_lang_Class::as_Klass(mirror);
310 assert(k != NULL, "class for non-primitive mirror must exist");
311 *size_ptr = (jlong)k->size() * wordSize;
312 } else {
313 *size_ptr = (jlong)mirror->size() * wordSize;
314 }
315 return JVMTI_ERROR_NONE;
316 } /* end GetObjectSize */
318 //
319 // Method functions
320 //
322 // prefix - NULL is a valid value, must be checked
323 jvmtiError
324 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
325 return prefix == NULL?
326 SetNativeMethodPrefixes(0, NULL) :
327 SetNativeMethodPrefixes(1, (char**)&prefix);
328 } /* end SetNativeMethodPrefix */
331 // prefix_count - pre-checked to be greater than or equal to 0
332 // prefixes - pre-checked for NULL
333 jvmtiError
334 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
335 // Have to grab JVMTI thread state lock to be sure that some thread
336 // isn't accessing the prefixes at the same time we are setting them.
337 // No locks during VM bring-up.
338 if (Threads::number_of_threads() == 0) {
339 return set_native_method_prefixes(prefix_count, prefixes);
340 } else {
341 MutexLocker mu(JvmtiThreadState_lock);
342 return set_native_method_prefixes(prefix_count, prefixes);
343 }
344 } /* end SetNativeMethodPrefixes */
346 //
347 // Event Management functions
348 //
350 // callbacks - NULL is a valid value, must be checked
351 // size_of_callbacks - pre-checked to be greater than or equal to 0
352 jvmtiError
353 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
354 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
355 return JVMTI_ERROR_NONE;
356 } /* end SetEventCallbacks */
359 // event_thread - NULL is a valid value, must be checked
360 jvmtiError
361 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
362 JavaThread* java_thread = NULL;
363 if (event_thread != NULL) {
364 oop thread_oop = JNIHandles::resolve_external_guard(event_thread);
365 if (thread_oop == NULL) {
366 return JVMTI_ERROR_INVALID_THREAD;
367 }
368 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
369 return JVMTI_ERROR_INVALID_THREAD;
370 }
371 java_thread = java_lang_Thread::thread(thread_oop);
372 if (java_thread == NULL) {
373 return JVMTI_ERROR_THREAD_NOT_ALIVE;
374 }
375 }
377 // event_type must be valid
378 if (!JvmtiEventController::is_valid_event_type(event_type)) {
379 return JVMTI_ERROR_INVALID_EVENT_TYPE;
380 }
382 // global events cannot be controlled at thread level.
383 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) {
384 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
385 }
387 bool enabled = (mode == JVMTI_ENABLE);
389 // assure that needed capabilities are present
390 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
391 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
392 }
394 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
395 record_class_file_load_hook_enabled();
396 }
397 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
399 return JVMTI_ERROR_NONE;
400 } /* end SetEventNotificationMode */
402 //
403 // Capability functions
404 //
406 // capabilities_ptr - pre-checked for NULL
407 jvmtiError
408 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
409 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
410 get_prohibited_capabilities(),
411 capabilities_ptr);
412 return JVMTI_ERROR_NONE;
413 } /* end GetPotentialCapabilities */
416 // capabilities_ptr - pre-checked for NULL
417 jvmtiError
418 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
419 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
420 get_prohibited_capabilities(),
421 capabilities_ptr,
422 get_capabilities());
423 } /* end AddCapabilities */
426 // capabilities_ptr - pre-checked for NULL
427 jvmtiError
428 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
429 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
430 return JVMTI_ERROR_NONE;
431 } /* end RelinquishCapabilities */
434 // capabilities_ptr - pre-checked for NULL
435 jvmtiError
436 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
437 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
438 return JVMTI_ERROR_NONE;
439 } /* end GetCapabilities */
441 //
442 // Class Loader Search functions
443 //
445 // segment - pre-checked for NULL
446 jvmtiError
447 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
448 jvmtiPhase phase = get_phase();
449 if (phase == JVMTI_PHASE_ONLOAD) {
450 Arguments::append_sysclasspath(segment);
451 return JVMTI_ERROR_NONE;
452 } else if (use_version_1_0_semantics()) {
453 // This JvmtiEnv requested version 1.0 semantics and this function
454 // is only allowed in the ONLOAD phase in version 1.0 so we need to
455 // return an error here.
456 return JVMTI_ERROR_WRONG_PHASE;
457 } else if (phase == JVMTI_PHASE_LIVE) {
458 // The phase is checked by the wrapper that called this function,
459 // but this thread could be racing with the thread that is
460 // terminating the VM so we check one more time.
462 // create the zip entry
463 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
464 if (zip_entry == NULL) {
465 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
466 }
468 // lock the loader
469 Thread* thread = Thread::current();
470 HandleMark hm;
471 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
473 ObjectLocker ol(loader_lock, thread);
475 // add the jar file to the bootclasspath
476 if (TraceClassLoading) {
477 tty->print_cr("[Opened %s]", zip_entry->name());
478 }
479 ClassLoaderExt::append_boot_classpath(zip_entry);
480 return JVMTI_ERROR_NONE;
481 } else {
482 return JVMTI_ERROR_WRONG_PHASE;
483 }
485 } /* end AddToBootstrapClassLoaderSearch */
488 // segment - pre-checked for NULL
489 jvmtiError
490 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
491 jvmtiPhase phase = get_phase();
493 if (phase == JVMTI_PHASE_ONLOAD) {
494 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
495 if (strcmp("java.class.path", p->key()) == 0) {
496 p->append_value(segment);
497 break;
498 }
499 }
500 return JVMTI_ERROR_NONE;
501 } else if (phase == JVMTI_PHASE_LIVE) {
502 // The phase is checked by the wrapper that called this function,
503 // but this thread could be racing with the thread that is
504 // terminating the VM so we check one more time.
505 HandleMark hm;
507 // create the zip entry (which will open the zip file and hence
508 // check that the segment is indeed a zip file).
509 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment);
510 if (zip_entry == NULL) {
511 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
512 }
513 delete zip_entry; // no longer needed
515 // lock the loader
516 Thread* THREAD = Thread::current();
517 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
519 ObjectLocker ol(loader, THREAD);
521 // need the path as java.lang.String
522 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
523 if (HAS_PENDING_EXCEPTION) {
524 CLEAR_PENDING_EXCEPTION;
525 return JVMTI_ERROR_INTERNAL;
526 }
528 instanceKlassHandle loader_ik(THREAD, loader->klass());
530 // Invoke the appendToClassPathForInstrumentation method - if the method
531 // is not found it means the loader doesn't support adding to the class path
532 // in the live phase.
533 {
534 JavaValue res(T_VOID);
535 JavaCalls::call_special(&res,
536 loader,
537 loader_ik,
538 vmSymbols::appendToClassPathForInstrumentation_name(),
539 vmSymbols::appendToClassPathForInstrumentation_signature(),
540 path,
541 THREAD);
542 if (HAS_PENDING_EXCEPTION) {
543 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
544 CLEAR_PENDING_EXCEPTION;
546 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
547 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
548 } else {
549 return JVMTI_ERROR_INTERNAL;
550 }
551 }
552 }
554 return JVMTI_ERROR_NONE;
555 } else {
556 return JVMTI_ERROR_WRONG_PHASE;
557 }
558 } /* end AddToSystemClassLoaderSearch */
560 //
561 // General functions
562 //
564 // phase_ptr - pre-checked for NULL
565 jvmtiError
566 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
567 *phase_ptr = get_phase();
568 return JVMTI_ERROR_NONE;
569 } /* end GetPhase */
572 jvmtiError
573 JvmtiEnv::DisposeEnvironment() {
574 dispose();
575 return JVMTI_ERROR_NONE;
576 } /* end DisposeEnvironment */
579 // data - NULL is a valid value, must be checked
580 jvmtiError
581 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
582 set_env_local_storage(data);
583 return JVMTI_ERROR_NONE;
584 } /* end SetEnvironmentLocalStorage */
587 // data_ptr - pre-checked for NULL
588 jvmtiError
589 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
590 *data_ptr = (void*)get_env_local_storage();
591 return JVMTI_ERROR_NONE;
592 } /* end GetEnvironmentLocalStorage */
594 // version_ptr - pre-checked for NULL
595 jvmtiError
596 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
597 *version_ptr = JVMTI_VERSION;
598 return JVMTI_ERROR_NONE;
599 } /* end GetVersionNumber */
602 // name_ptr - pre-checked for NULL
603 jvmtiError
604 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
605 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
606 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
607 }
608 const char *name = JvmtiUtil::error_name(error);
609 if (name == NULL) {
610 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
611 }
612 size_t len = strlen(name) + 1;
613 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
614 if (err == JVMTI_ERROR_NONE) {
615 memcpy(*name_ptr, name, len);
616 }
617 return err;
618 } /* end GetErrorName */
621 jvmtiError
622 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
623 switch (flag) {
624 case JVMTI_VERBOSE_OTHER:
625 // ignore
626 break;
627 case JVMTI_VERBOSE_CLASS:
628 TraceClassLoading = value != 0;
629 TraceClassUnloading = value != 0;
630 break;
631 case JVMTI_VERBOSE_GC:
632 PrintGC = value != 0;
633 break;
634 case JVMTI_VERBOSE_JNI:
635 PrintJNIResolving = value != 0;
636 break;
637 default:
638 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
639 };
640 return JVMTI_ERROR_NONE;
641 } /* end SetVerboseFlag */
644 // format_ptr - pre-checked for NULL
645 jvmtiError
646 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
647 *format_ptr = JVMTI_JLOCATION_JVMBCI;
648 return JVMTI_ERROR_NONE;
649 } /* end GetJLocationFormat */
651 //
652 // Thread functions
653 //
655 // Threads_lock NOT held
656 // thread - NOT pre-checked
657 // thread_state_ptr - pre-checked for NULL
658 jvmtiError
659 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
660 jint state;
661 oop thread_oop;
662 JavaThread* thr;
664 if (thread == NULL) {
665 thread_oop = JavaThread::current()->threadObj();
666 } else {
667 thread_oop = JNIHandles::resolve_external_guard(thread);
668 }
670 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
671 return JVMTI_ERROR_INVALID_THREAD;
672 }
674 // get most state bits
675 state = (jint)java_lang_Thread::get_thread_status(thread_oop);
677 // add more state bits
678 thr = java_lang_Thread::thread(thread_oop);
679 if (thr != NULL) {
680 JavaThreadState jts = thr->thread_state();
682 if (thr->is_being_ext_suspended()) {
683 state |= JVMTI_THREAD_STATE_SUSPENDED;
684 }
685 if (jts == _thread_in_native) {
686 state |= JVMTI_THREAD_STATE_IN_NATIVE;
687 }
688 OSThread* osThread = thr->osthread();
689 if (osThread != NULL && osThread->interrupted()) {
690 state |= JVMTI_THREAD_STATE_INTERRUPTED;
691 }
692 }
694 *thread_state_ptr = state;
695 return JVMTI_ERROR_NONE;
696 } /* end GetThreadState */
699 // thread_ptr - pre-checked for NULL
700 jvmtiError
701 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
702 JavaThread* current_thread = JavaThread::current();
703 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
704 return JVMTI_ERROR_NONE;
705 } /* end GetCurrentThread */
708 // threads_count_ptr - pre-checked for NULL
709 // threads_ptr - pre-checked for NULL
710 jvmtiError
711 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
712 int nthreads = 0;
713 Handle *thread_objs = NULL;
714 ResourceMark rm;
715 HandleMark hm;
717 // enumerate threads (including agent threads)
718 ThreadsListEnumerator tle(Thread::current(), true);
719 nthreads = tle.num_threads();
720 *threads_count_ptr = nthreads;
722 if (nthreads == 0) {
723 *threads_ptr = NULL;
724 return JVMTI_ERROR_NONE;
725 }
727 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
728 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
730 for (int i=0; i < nthreads; i++) {
731 thread_objs[i] = Handle(tle.get_threadObj(i));
732 }
734 // have to make global handles outside of Threads_lock
735 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
736 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
738 *threads_ptr = jthreads;
739 return JVMTI_ERROR_NONE;
740 } /* end GetAllThreads */
743 // Threads_lock NOT held, java_thread not protected by lock
744 // java_thread - pre-checked
745 jvmtiError
746 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
747 // don't allow hidden thread suspend request.
748 if (java_thread->is_hidden_from_external_view()) {
749 return (JVMTI_ERROR_NONE);
750 }
752 {
753 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
754 if (java_thread->is_external_suspend()) {
755 // don't allow nested external suspend requests.
756 return (JVMTI_ERROR_THREAD_SUSPENDED);
757 }
758 if (java_thread->is_exiting()) { // thread is in the process of exiting
759 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
760 }
761 java_thread->set_external_suspend();
762 }
764 if (!JvmtiSuspendControl::suspend(java_thread)) {
765 // the thread was in the process of exiting
766 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
767 }
768 return JVMTI_ERROR_NONE;
769 } /* end SuspendThread */
772 // request_count - pre-checked to be greater than or equal to 0
773 // request_list - pre-checked for NULL
774 // results - pre-checked for NULL
775 jvmtiError
776 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
777 int needSafepoint = 0; // > 0 if we need a safepoint
778 for (int i = 0; i < request_count; i++) {
779 JavaThread *java_thread = get_JavaThread(request_list[i]);
780 if (java_thread == NULL) {
781 results[i] = JVMTI_ERROR_INVALID_THREAD;
782 continue;
783 }
784 // the thread has not yet run or has exited (not on threads list)
785 if (java_thread->threadObj() == NULL) {
786 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
787 continue;
788 }
789 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) {
790 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
791 continue;
792 }
793 // don't allow hidden thread suspend request.
794 if (java_thread->is_hidden_from_external_view()) {
795 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
796 continue;
797 }
799 {
800 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
801 if (java_thread->is_external_suspend()) {
802 // don't allow nested external suspend requests.
803 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
804 continue;
805 }
806 if (java_thread->is_exiting()) { // thread is in the process of exiting
807 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
808 continue;
809 }
810 java_thread->set_external_suspend();
811 }
812 if (java_thread->thread_state() == _thread_in_native) {
813 // We need to try and suspend native threads here. Threads in
814 // other states will self-suspend on their next transition.
815 if (!JvmtiSuspendControl::suspend(java_thread)) {
816 // The thread was in the process of exiting. Force another
817 // safepoint to make sure that this thread transitions.
818 needSafepoint++;
819 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
820 continue;
821 }
822 } else {
823 needSafepoint++;
824 }
825 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
826 }
827 if (needSafepoint > 0) {
828 VM_ForceSafepoint vfs;
829 VMThread::execute(&vfs);
830 }
831 // per-thread suspend results returned via results parameter
832 return JVMTI_ERROR_NONE;
833 } /* end SuspendThreadList */
836 // Threads_lock NOT held, java_thread not protected by lock
837 // java_thread - pre-checked
838 jvmtiError
839 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
840 // don't allow hidden thread resume request.
841 if (java_thread->is_hidden_from_external_view()) {
842 return JVMTI_ERROR_NONE;
843 }
845 if (!java_thread->is_being_ext_suspended()) {
846 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
847 }
849 if (!JvmtiSuspendControl::resume(java_thread)) {
850 return JVMTI_ERROR_INTERNAL;
851 }
852 return JVMTI_ERROR_NONE;
853 } /* end ResumeThread */
856 // request_count - pre-checked to be greater than or equal to 0
857 // request_list - pre-checked for NULL
858 // results - pre-checked for NULL
859 jvmtiError
860 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
861 for (int i = 0; i < request_count; i++) {
862 JavaThread *java_thread = get_JavaThread(request_list[i]);
863 if (java_thread == NULL) {
864 results[i] = JVMTI_ERROR_INVALID_THREAD;
865 continue;
866 }
867 // don't allow hidden thread resume request.
868 if (java_thread->is_hidden_from_external_view()) {
869 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
870 continue;
871 }
872 if (!java_thread->is_being_ext_suspended()) {
873 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
874 continue;
875 }
877 if (!JvmtiSuspendControl::resume(java_thread)) {
878 results[i] = JVMTI_ERROR_INTERNAL;
879 continue;
880 }
882 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
883 }
884 // per-thread resume results returned via results parameter
885 return JVMTI_ERROR_NONE;
886 } /* end ResumeThreadList */
889 // Threads_lock NOT held, java_thread not protected by lock
890 // java_thread - pre-checked
891 jvmtiError
892 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
893 oop e = JNIHandles::resolve_external_guard(exception);
894 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
896 JavaThread::send_async_exception(java_thread->threadObj(), e);
898 return JVMTI_ERROR_NONE;
900 } /* end StopThread */
903 // Threads_lock NOT held
904 // thread - NOT pre-checked
905 jvmtiError
906 JvmtiEnv::InterruptThread(jthread thread) {
907 oop thread_oop = JNIHandles::resolve_external_guard(thread);
908 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
909 return JVMTI_ERROR_INVALID_THREAD;
911 JavaThread* current_thread = JavaThread::current();
913 // Todo: this is a duplicate of JVM_Interrupt; share code in future
914 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
915 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock);
916 // We need to re-resolve the java_thread, since a GC might have happened during the
917 // acquire of the lock
919 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread));
920 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE);
922 Thread::interrupt(java_thread);
924 return JVMTI_ERROR_NONE;
925 } /* end InterruptThread */
928 // Threads_lock NOT held
929 // thread - NOT pre-checked
930 // info_ptr - pre-checked for NULL
931 jvmtiError
932 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
933 ResourceMark rm;
934 HandleMark hm;
936 JavaThread* current_thread = JavaThread::current();
938 // if thread is NULL the current thread is used
939 oop thread_oop;
940 if (thread == NULL) {
941 thread_oop = current_thread->threadObj();
942 } else {
943 thread_oop = JNIHandles::resolve_external_guard(thread);
944 }
945 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass()))
946 return JVMTI_ERROR_INVALID_THREAD;
948 Handle thread_obj(current_thread, thread_oop);
949 Handle name;
950 ThreadPriority priority;
951 Handle thread_group;
952 Handle context_class_loader;
953 bool is_daemon;
955 { MutexLocker mu(Threads_lock);
957 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
958 priority = java_lang_Thread::priority(thread_obj());
959 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
960 is_daemon = java_lang_Thread::is_daemon(thread_obj());
962 oop loader = java_lang_Thread::context_class_loader(thread_obj());
963 context_class_loader = Handle(current_thread, loader);
964 }
965 { const char *n;
967 if (name() != NULL) {
968 n = java_lang_String::as_utf8_string(name());
969 } else {
970 n = UNICODE::as_utf8(NULL, 0);
971 }
973 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
974 if (info_ptr->name == NULL)
975 return JVMTI_ERROR_OUT_OF_MEMORY;
977 strcpy(info_ptr->name, n);
978 }
979 info_ptr->is_daemon = is_daemon;
980 info_ptr->priority = priority;
982 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
983 jni_reference(context_class_loader);
984 info_ptr->thread_group = jni_reference(thread_group);
986 return JVMTI_ERROR_NONE;
987 } /* end GetThreadInfo */
990 // Threads_lock NOT held, java_thread not protected by lock
991 // java_thread - pre-checked
992 // owned_monitor_count_ptr - pre-checked for NULL
993 // owned_monitors_ptr - pre-checked for NULL
994 jvmtiError
995 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
996 jvmtiError err = JVMTI_ERROR_NONE;
997 JavaThread* calling_thread = JavaThread::current();
999 // growable array of jvmti monitors info on the C-heap
1000 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1001 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1003 // It is only safe to perform the direct operation on the current
1004 // thread. All other usage needs to use a vm-safepoint-op for safety.
1005 if (java_thread == calling_thread) {
1006 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1007 } else {
1008 // JVMTI get monitors info at safepoint. Do not require target thread to
1009 // be suspended.
1010 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1011 VMThread::execute(&op);
1012 err = op.result();
1013 }
1014 jint owned_monitor_count = owned_monitors_list->length();
1015 if (err == JVMTI_ERROR_NONE) {
1016 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1017 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1018 // copy into the returned array
1019 for (int i = 0; i < owned_monitor_count; i++) {
1020 (*owned_monitors_ptr)[i] =
1021 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1022 }
1023 *owned_monitor_count_ptr = owned_monitor_count;
1024 }
1025 }
1026 // clean up.
1027 for (int i = 0; i < owned_monitor_count; i++) {
1028 deallocate((unsigned char*)owned_monitors_list->at(i));
1029 }
1030 delete owned_monitors_list;
1032 return err;
1033 } /* end GetOwnedMonitorInfo */
1036 // Threads_lock NOT held, java_thread not protected by lock
1037 // java_thread - pre-checked
1038 // monitor_info_count_ptr - pre-checked for NULL
1039 // monitor_info_ptr - pre-checked for NULL
1040 jvmtiError
1041 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1042 jvmtiError err = JVMTI_ERROR_NONE;
1043 JavaThread* calling_thread = JavaThread::current();
1045 // growable array of jvmti monitors info on the C-heap
1046 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1047 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1049 // It is only safe to perform the direct operation on the current
1050 // thread. All other usage needs to use a vm-safepoint-op for safety.
1051 if (java_thread == calling_thread) {
1052 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1053 } else {
1054 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1055 // be suspended.
1056 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1057 VMThread::execute(&op);
1058 err = op.result();
1059 }
1061 jint owned_monitor_count = owned_monitors_list->length();
1062 if (err == JVMTI_ERROR_NONE) {
1063 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1064 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1065 // copy to output array.
1066 for (int i = 0; i < owned_monitor_count; i++) {
1067 (*monitor_info_ptr)[i].monitor =
1068 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1069 (*monitor_info_ptr)[i].stack_depth =
1070 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1071 }
1072 }
1073 *monitor_info_count_ptr = owned_monitor_count;
1074 }
1076 // clean up.
1077 for (int i = 0; i < owned_monitor_count; i++) {
1078 deallocate((unsigned char*)owned_monitors_list->at(i));
1079 }
1080 delete owned_monitors_list;
1082 return err;
1083 } /* end GetOwnedMonitorStackDepthInfo */
1086 // Threads_lock NOT held, java_thread not protected by lock
1087 // java_thread - pre-checked
1088 // monitor_ptr - pre-checked for NULL
1089 jvmtiError
1090 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1091 jvmtiError err = JVMTI_ERROR_NONE;
1092 JavaThread* calling_thread = JavaThread::current();
1094 // It is only safe to perform the direct operation on the current
1095 // thread. All other usage needs to use a vm-safepoint-op for safety.
1096 if (java_thread == calling_thread) {
1097 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1098 } else {
1099 // get contended monitor information at safepoint.
1100 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1101 VMThread::execute(&op);
1102 err = op.result();
1103 }
1104 return err;
1105 } /* end GetCurrentContendedMonitor */
1108 // Threads_lock NOT held
1109 // thread - NOT pre-checked
1110 // proc - pre-checked for NULL
1111 // arg - NULL is a valid value, must be checked
1112 jvmtiError
1113 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1114 oop thread_oop = JNIHandles::resolve_external_guard(thread);
1115 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1116 return JVMTI_ERROR_INVALID_THREAD;
1117 }
1118 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1119 return JVMTI_ERROR_INVALID_PRIORITY;
1120 }
1122 //Thread-self
1123 JavaThread* current_thread = JavaThread::current();
1125 Handle thread_hndl(current_thread, thread_oop);
1126 {
1127 MutexLocker mu(Threads_lock); // grab Threads_lock
1129 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1131 // At this point it may be possible that no osthread was created for the
1132 // JavaThread due to lack of memory.
1133 if (new_thread == NULL || new_thread->osthread() == NULL) {
1134 if (new_thread) delete new_thread;
1135 return JVMTI_ERROR_OUT_OF_MEMORY;
1136 }
1138 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1139 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1140 java_lang_Thread::set_daemon(thread_hndl());
1142 new_thread->set_threadObj(thread_hndl());
1143 Threads::add(new_thread);
1144 Thread::start(new_thread);
1145 } // unlock Threads_lock
1147 return JVMTI_ERROR_NONE;
1148 } /* end RunAgentThread */
1150 //
1151 // Thread Group functions
1152 //
1154 // group_count_ptr - pre-checked for NULL
1155 // groups_ptr - pre-checked for NULL
1156 jvmtiError
1157 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1158 JavaThread* current_thread = JavaThread::current();
1160 // Only one top level thread group now.
1161 *group_count_ptr = 1;
1163 // Allocate memory to store global-refs to the thread groups.
1164 // Assume this area is freed by caller.
1165 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1167 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1169 // Convert oop to Handle, then convert Handle to global-ref.
1170 {
1171 HandleMark hm(current_thread);
1172 Handle system_thread_group(current_thread, Universe::system_thread_group());
1173 *groups_ptr[0] = jni_reference(system_thread_group);
1174 }
1176 return JVMTI_ERROR_NONE;
1177 } /* end GetTopThreadGroups */
1180 // info_ptr - pre-checked for NULL
1181 jvmtiError
1182 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1183 ResourceMark rm;
1184 HandleMark hm;
1186 JavaThread* current_thread = JavaThread::current();
1188 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1189 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1191 typeArrayHandle name;
1192 Handle parent_group;
1193 bool is_daemon;
1194 ThreadPriority max_priority;
1196 { MutexLocker mu(Threads_lock);
1198 name = typeArrayHandle(current_thread,
1199 java_lang_ThreadGroup::name(group_obj()));
1200 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1201 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1202 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1203 }
1205 info_ptr->is_daemon = is_daemon;
1206 info_ptr->max_priority = max_priority;
1207 info_ptr->parent = jni_reference(parent_group);
1209 if (name() != NULL) {
1210 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length());
1211 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1);
1212 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1213 strcpy(info_ptr->name, n);
1214 } else {
1215 info_ptr->name = NULL;
1216 }
1218 return JVMTI_ERROR_NONE;
1219 } /* end GetThreadGroupInfo */
1222 // thread_count_ptr - pre-checked for NULL
1223 // threads_ptr - pre-checked for NULL
1224 // group_count_ptr - pre-checked for NULL
1225 // groups_ptr - pre-checked for NULL
1226 jvmtiError
1227 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1228 JavaThread* current_thread = JavaThread::current();
1229 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1230 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1232 Handle *thread_objs = NULL;
1233 Handle *group_objs = NULL;
1234 int nthreads = 0;
1235 int ngroups = 0;
1236 int hidden_threads = 0;
1238 ResourceMark rm;
1239 HandleMark hm;
1241 Handle group_hdl(current_thread, group_obj);
1243 { MutexLocker mu(Threads_lock);
1245 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1246 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1248 if (nthreads > 0) {
1249 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1250 assert(nthreads <= threads->length(), "too many threads");
1251 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1252 for (int i=0, j=0; i<nthreads; i++) {
1253 oop thread_obj = threads->obj_at(i);
1254 assert(thread_obj != NULL, "thread_obj is NULL");
1255 JavaThread *javathread = java_lang_Thread::thread(thread_obj);
1256 // Filter out hidden java threads.
1257 if (javathread != NULL && javathread->is_hidden_from_external_view()) {
1258 hidden_threads++;
1259 continue;
1260 }
1261 thread_objs[j++] = Handle(current_thread, thread_obj);
1262 }
1263 nthreads -= hidden_threads;
1264 }
1265 if (ngroups > 0) {
1266 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1267 assert(ngroups <= groups->length(), "too many threads");
1268 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1269 for (int i=0; i<ngroups; i++) {
1270 oop group_obj = groups->obj_at(i);
1271 assert(group_obj != NULL, "group_obj != NULL");
1272 group_objs[i] = Handle(current_thread, group_obj);
1273 }
1274 }
1275 }
1277 // have to make global handles outside of Threads_lock
1278 *group_count_ptr = ngroups;
1279 *thread_count_ptr = nthreads;
1280 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1281 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1282 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1283 return JVMTI_ERROR_OUT_OF_MEMORY;
1284 }
1285 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1286 return JVMTI_ERROR_OUT_OF_MEMORY;
1287 }
1289 return JVMTI_ERROR_NONE;
1290 } /* end GetThreadGroupChildren */
1293 //
1294 // Stack Frame functions
1295 //
1297 // Threads_lock NOT held, java_thread not protected by lock
1298 // java_thread - pre-checked
1299 // max_frame_count - pre-checked to be greater than or equal to 0
1300 // frame_buffer - pre-checked for NULL
1301 // count_ptr - pre-checked for NULL
1302 jvmtiError
1303 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1304 jvmtiError err = JVMTI_ERROR_NONE;
1306 // It is only safe to perform the direct operation on the current
1307 // thread. All other usage needs to use a vm-safepoint-op for safety.
1308 if (java_thread == JavaThread::current()) {
1309 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1310 } else {
1311 // JVMTI get stack trace at safepoint. Do not require target thread to
1312 // be suspended.
1313 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1314 VMThread::execute(&op);
1315 err = op.result();
1316 }
1318 return err;
1319 } /* end GetStackTrace */
1322 // max_frame_count - pre-checked to be greater than or equal to 0
1323 // stack_info_ptr - pre-checked for NULL
1324 // thread_count_ptr - pre-checked for NULL
1325 jvmtiError
1326 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1327 jvmtiError err = JVMTI_ERROR_NONE;
1328 JavaThread* calling_thread = JavaThread::current();
1330 // JVMTI get stack traces at safepoint.
1331 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1332 VMThread::execute(&op);
1333 *thread_count_ptr = op.final_thread_count();
1334 *stack_info_ptr = op.stack_info();
1335 err = op.result();
1336 return err;
1337 } /* end GetAllStackTraces */
1340 // thread_count - pre-checked to be greater than or equal to 0
1341 // thread_list - pre-checked for NULL
1342 // max_frame_count - pre-checked to be greater than or equal to 0
1343 // stack_info_ptr - pre-checked for NULL
1344 jvmtiError
1345 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1346 jvmtiError err = JVMTI_ERROR_NONE;
1347 // JVMTI get stack traces at safepoint.
1348 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1349 VMThread::execute(&op);
1350 err = op.result();
1351 if (err == JVMTI_ERROR_NONE) {
1352 *stack_info_ptr = op.stack_info();
1353 }
1354 return err;
1355 } /* end GetThreadListStackTraces */
1358 // Threads_lock NOT held, java_thread not protected by lock
1359 // java_thread - pre-checked
1360 // count_ptr - pre-checked for NULL
1361 jvmtiError
1362 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1363 jvmtiError err = JVMTI_ERROR_NONE;
1365 // retrieve or create JvmtiThreadState.
1366 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1367 if (state == NULL) {
1368 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1369 }
1370 uint32_t debug_bits = 0;
1371 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1372 err = get_frame_count(state, count_ptr);
1373 } else {
1374 // get java stack frame count at safepoint.
1375 VM_GetFrameCount op(this, state, count_ptr);
1376 VMThread::execute(&op);
1377 err = op.result();
1378 }
1379 return err;
1380 } /* end GetFrameCount */
1383 // Threads_lock NOT held, java_thread not protected by lock
1384 // java_thread - pre-checked
1385 jvmtiError
1386 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1387 JavaThread* current_thread = JavaThread::current();
1388 HandleMark hm(current_thread);
1389 uint32_t debug_bits = 0;
1391 // retrieve or create the state
1392 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1393 if (state == NULL) {
1394 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1395 }
1397 // Check if java_thread is fully suspended
1398 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) {
1399 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1400 }
1401 // Check to see if a PopFrame was already in progress
1402 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1403 // Probably possible for JVMTI clients to trigger this, but the
1404 // JPDA backend shouldn't allow this to happen
1405 return JVMTI_ERROR_INTERNAL;
1406 }
1408 {
1409 // Was workaround bug
1410 // 4812902: popFrame hangs if the method is waiting at a synchronize
1411 // Catch this condition and return an error to avoid hanging.
1412 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1413 OSThread* osThread = java_thread->osthread();
1414 if (osThread->get_state() == MONITOR_WAIT) {
1415 return JVMTI_ERROR_OPAQUE_FRAME;
1416 }
1417 }
1419 {
1420 ResourceMark rm(current_thread);
1421 // Check if there are more than one Java frame in this thread, that the top two frames
1422 // are Java (not native) frames, and that there is no intervening VM frame
1423 int frame_count = 0;
1424 bool is_interpreted[2];
1425 intptr_t *frame_sp[2];
1426 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1427 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1428 methodHandle mh(current_thread, vfs.method());
1429 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1430 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1431 frame_sp[frame_count] = vfs.frame_id();
1432 if (++frame_count > 1) break;
1433 }
1434 if (frame_count < 2) {
1435 // We haven't found two adjacent non-native Java frames on the top.
1436 // There can be two situations here:
1437 // 1. There are no more java frames
1438 // 2. Two top java frames are separated by non-java native frames
1439 if(vframeFor(java_thread, 1) == NULL) {
1440 return JVMTI_ERROR_NO_MORE_FRAMES;
1441 } else {
1442 // Intervening non-java native or VM frames separate java frames.
1443 // Current implementation does not support this. See bug #5031735.
1444 // In theory it is possible to pop frames in such cases.
1445 return JVMTI_ERROR_OPAQUE_FRAME;
1446 }
1447 }
1449 // If any of the top 2 frames is a compiled one, need to deoptimize it
1450 for (int i = 0; i < 2; i++) {
1451 if (!is_interpreted[i]) {
1452 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1453 }
1454 }
1456 // Update the thread state to reflect that the top frame is popped
1457 // so that cur_stack_depth is maintained properly and all frameIDs
1458 // are invalidated.
1459 // The current frame will be popped later when the suspended thread
1460 // is resumed and right before returning from VM to Java.
1461 // (see call_VM_base() in assembler_<cpu>.cpp).
1463 // It's fine to update the thread state here because no JVMTI events
1464 // shall be posted for this PopFrame.
1466 state->update_for_pop_top_frame();
1467 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1468 // Set pending step flag for this popframe and it is cleared when next
1469 // step event is posted.
1470 state->set_pending_step_for_popframe();
1471 }
1473 return JVMTI_ERROR_NONE;
1474 } /* end PopFrame */
1477 // Threads_lock NOT held, java_thread not protected by lock
1478 // java_thread - pre-checked
1479 // java_thread - unchecked
1480 // depth - pre-checked as non-negative
1481 // method_ptr - pre-checked for NULL
1482 // location_ptr - pre-checked for NULL
1483 jvmtiError
1484 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1485 jvmtiError err = JVMTI_ERROR_NONE;
1486 uint32_t debug_bits = 0;
1488 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1489 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1490 } else {
1491 // JVMTI get java stack frame location at safepoint.
1492 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1493 VMThread::execute(&op);
1494 err = op.result();
1495 }
1496 return err;
1497 } /* end GetFrameLocation */
1500 // Threads_lock NOT held, java_thread not protected by lock
1501 // java_thread - pre-checked
1502 // java_thread - unchecked
1503 // depth - pre-checked as non-negative
1504 jvmtiError
1505 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1506 ResourceMark rm;
1507 uint32_t debug_bits = 0;
1509 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1510 if (state == NULL) {
1511 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1512 }
1514 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) {
1515 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1516 }
1518 if (TraceJVMTICalls) {
1519 JvmtiSuspendControl::print();
1520 }
1522 vframe *vf = vframeFor(java_thread, depth);
1523 if (vf == NULL) {
1524 return JVMTI_ERROR_NO_MORE_FRAMES;
1525 }
1527 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1528 return JVMTI_ERROR_OPAQUE_FRAME;
1529 }
1531 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1533 int frame_number = state->count_frames() - depth;
1534 state->env_thread_state(this)->set_frame_pop(frame_number);
1536 return JVMTI_ERROR_NONE;
1537 } /* end NotifyFramePop */
1540 //
1541 // Force Early Return functions
1542 //
1544 // Threads_lock NOT held, java_thread not protected by lock
1545 // java_thread - pre-checked
1546 jvmtiError
1547 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1548 jvalue val;
1549 val.l = value;
1550 return force_early_return(java_thread, val, atos);
1551 } /* end ForceEarlyReturnObject */
1554 // Threads_lock NOT held, java_thread not protected by lock
1555 // java_thread - pre-checked
1556 jvmtiError
1557 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1558 jvalue val;
1559 val.i = value;
1560 return force_early_return(java_thread, val, itos);
1561 } /* end ForceEarlyReturnInt */
1564 // Threads_lock NOT held, java_thread not protected by lock
1565 // java_thread - pre-checked
1566 jvmtiError
1567 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1568 jvalue val;
1569 val.j = value;
1570 return force_early_return(java_thread, val, ltos);
1571 } /* end ForceEarlyReturnLong */
1574 // Threads_lock NOT held, java_thread not protected by lock
1575 // java_thread - pre-checked
1576 jvmtiError
1577 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1578 jvalue val;
1579 val.f = value;
1580 return force_early_return(java_thread, val, ftos);
1581 } /* end ForceEarlyReturnFloat */
1584 // Threads_lock NOT held, java_thread not protected by lock
1585 // java_thread - pre-checked
1586 jvmtiError
1587 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1588 jvalue val;
1589 val.d = value;
1590 return force_early_return(java_thread, val, dtos);
1591 } /* end ForceEarlyReturnDouble */
1594 // Threads_lock NOT held, java_thread not protected by lock
1595 // java_thread - pre-checked
1596 jvmtiError
1597 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1598 jvalue val;
1599 val.j = 0L;
1600 return force_early_return(java_thread, val, vtos);
1601 } /* end ForceEarlyReturnVoid */
1604 //
1605 // Heap functions
1606 //
1608 // klass - NULL is a valid value, must be checked
1609 // initial_object - NULL is a valid value, must be checked
1610 // callbacks - pre-checked for NULL
1611 // user_data - NULL is a valid value, must be checked
1612 jvmtiError
1613 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1614 // check klass if provided
1615 Klass* k_oop = NULL;
1616 if (klass != NULL) {
1617 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1618 if (k_mirror == NULL) {
1619 return JVMTI_ERROR_INVALID_CLASS;
1620 }
1621 if (java_lang_Class::is_primitive(k_mirror)) {
1622 return JVMTI_ERROR_NONE;
1623 }
1624 k_oop = java_lang_Class::as_Klass(k_mirror);
1625 if (k_oop == NULL) {
1626 return JVMTI_ERROR_INVALID_CLASS;
1627 }
1628 }
1630 Thread *thread = Thread::current();
1631 HandleMark hm(thread);
1632 KlassHandle kh (thread, k_oop);
1634 TraceTime t("FollowReferences", TraceJVMTIObjectTagging);
1635 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data);
1636 return JVMTI_ERROR_NONE;
1637 } /* end FollowReferences */
1640 // klass - NULL is a valid value, must be checked
1641 // callbacks - pre-checked for NULL
1642 // user_data - NULL is a valid value, must be checked
1643 jvmtiError
1644 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1645 // check klass if provided
1646 Klass* k_oop = NULL;
1647 if (klass != NULL) {
1648 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1649 if (k_mirror == NULL) {
1650 return JVMTI_ERROR_INVALID_CLASS;
1651 }
1652 if (java_lang_Class::is_primitive(k_mirror)) {
1653 return JVMTI_ERROR_NONE;
1654 }
1655 k_oop = java_lang_Class::as_Klass(k_mirror);
1656 if (k_oop == NULL) {
1657 return JVMTI_ERROR_INVALID_CLASS;
1658 }
1659 }
1661 Thread *thread = Thread::current();
1662 HandleMark hm(thread);
1663 KlassHandle kh (thread, k_oop);
1665 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging);
1666 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data);
1667 return JVMTI_ERROR_NONE;
1668 } /* end IterateThroughHeap */
1671 // tag_ptr - pre-checked for NULL
1672 jvmtiError
1673 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1674 oop o = JNIHandles::resolve_external_guard(object);
1675 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1676 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1677 return JVMTI_ERROR_NONE;
1678 } /* end GetTag */
1681 jvmtiError
1682 JvmtiEnv::SetTag(jobject object, jlong tag) {
1683 oop o = JNIHandles::resolve_external_guard(object);
1684 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1685 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1686 return JVMTI_ERROR_NONE;
1687 } /* end SetTag */
1690 // tag_count - pre-checked to be greater than or equal to 0
1691 // tags - pre-checked for NULL
1692 // count_ptr - pre-checked for NULL
1693 // object_result_ptr - NULL is a valid value, must be checked
1694 // tag_result_ptr - NULL is a valid value, must be checked
1695 jvmtiError
1696 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1697 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging);
1698 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1699 } /* end GetObjectsWithTags */
1702 jvmtiError
1703 JvmtiEnv::ForceGarbageCollection() {
1704 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1705 return JVMTI_ERROR_NONE;
1706 } /* end ForceGarbageCollection */
1709 //
1710 // Heap (1.0) functions
1711 //
1713 // object_reference_callback - pre-checked for NULL
1714 // user_data - NULL is a valid value, must be checked
1715 jvmtiError
1716 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1717 oop o = JNIHandles::resolve_external_guard(object);
1718 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1719 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1720 return JVMTI_ERROR_NONE;
1721 } /* end IterateOverObjectsReachableFromObject */
1724 // heap_root_callback - NULL is a valid value, must be checked
1725 // stack_ref_callback - NULL is a valid value, must be checked
1726 // object_ref_callback - NULL is a valid value, must be checked
1727 // user_data - NULL is a valid value, must be checked
1728 jvmtiError
1729 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1730 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging);
1731 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1732 return JVMTI_ERROR_NONE;
1733 } /* end IterateOverReachableObjects */
1736 // heap_object_callback - pre-checked for NULL
1737 // user_data - NULL is a valid value, must be checked
1738 jvmtiError
1739 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1740 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging);
1741 Thread *thread = Thread::current();
1742 HandleMark hm(thread);
1743 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data);
1744 return JVMTI_ERROR_NONE;
1745 } /* end IterateOverHeap */
1748 // k_mirror - may be primitive, this must be checked
1749 // heap_object_callback - pre-checked for NULL
1750 // user_data - NULL is a valid value, must be checked
1751 jvmtiError
1752 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1753 if (java_lang_Class::is_primitive(k_mirror)) {
1754 // DO PRIMITIVE CLASS PROCESSING
1755 return JVMTI_ERROR_NONE;
1756 }
1757 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
1758 if (k_oop == NULL) {
1759 return JVMTI_ERROR_INVALID_CLASS;
1760 }
1761 Thread *thread = Thread::current();
1762 HandleMark hm(thread);
1763 KlassHandle klass (thread, k_oop);
1764 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging);
1765 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
1766 return JVMTI_ERROR_NONE;
1767 } /* end IterateOverInstancesOfClass */
1770 //
1771 // Local Variable functions
1772 //
1774 // Threads_lock NOT held, java_thread not protected by lock
1775 // java_thread - pre-checked
1776 // java_thread - unchecked
1777 // depth - pre-checked as non-negative
1778 // value_ptr - pre-checked for NULL
1779 jvmtiError
1780 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
1781 JavaThread* current_thread = JavaThread::current();
1782 // rm object is created to clean up the javaVFrame created in
1783 // doit_prologue(), but after doit() is finished with it.
1784 ResourceMark rm(current_thread);
1786 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
1787 VMThread::execute(&op);
1788 jvmtiError err = op.result();
1789 if (err != JVMTI_ERROR_NONE) {
1790 return err;
1791 } else {
1792 *value_ptr = op.value().l;
1793 return JVMTI_ERROR_NONE;
1794 }
1795 } /* end GetLocalObject */
1797 // Threads_lock NOT held, java_thread not protected by lock
1798 // java_thread - pre-checked
1799 // java_thread - unchecked
1800 // depth - pre-checked as non-negative
1801 // value - pre-checked for NULL
1802 jvmtiError
1803 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
1804 JavaThread* current_thread = JavaThread::current();
1805 // rm object is created to clean up the javaVFrame created in
1806 // doit_prologue(), but after doit() is finished with it.
1807 ResourceMark rm(current_thread);
1809 VM_GetReceiver op(java_thread, current_thread, depth);
1810 VMThread::execute(&op);
1811 jvmtiError err = op.result();
1812 if (err != JVMTI_ERROR_NONE) {
1813 return err;
1814 } else {
1815 *value_ptr = op.value().l;
1816 return JVMTI_ERROR_NONE;
1817 }
1818 } /* end GetLocalInstance */
1821 // Threads_lock NOT held, java_thread not protected by lock
1822 // java_thread - pre-checked
1823 // java_thread - unchecked
1824 // depth - pre-checked as non-negative
1825 // value_ptr - pre-checked for NULL
1826 jvmtiError
1827 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
1828 // rm object is created to clean up the javaVFrame created in
1829 // doit_prologue(), but after doit() is finished with it.
1830 ResourceMark rm;
1832 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
1833 VMThread::execute(&op);
1834 *value_ptr = op.value().i;
1835 return op.result();
1836 } /* end GetLocalInt */
1839 // Threads_lock NOT held, java_thread not protected by lock
1840 // java_thread - pre-checked
1841 // java_thread - unchecked
1842 // depth - pre-checked as non-negative
1843 // value_ptr - pre-checked for NULL
1844 jvmtiError
1845 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
1846 // rm object is created to clean up the javaVFrame created in
1847 // doit_prologue(), but after doit() is finished with it.
1848 ResourceMark rm;
1850 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
1851 VMThread::execute(&op);
1852 *value_ptr = op.value().j;
1853 return op.result();
1854 } /* end GetLocalLong */
1857 // Threads_lock NOT held, java_thread not protected by lock
1858 // java_thread - pre-checked
1859 // java_thread - unchecked
1860 // depth - pre-checked as non-negative
1861 // value_ptr - pre-checked for NULL
1862 jvmtiError
1863 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
1864 // rm object is created to clean up the javaVFrame created in
1865 // doit_prologue(), but after doit() is finished with it.
1866 ResourceMark rm;
1868 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
1869 VMThread::execute(&op);
1870 *value_ptr = op.value().f;
1871 return op.result();
1872 } /* end GetLocalFloat */
1875 // Threads_lock NOT held, java_thread not protected by lock
1876 // java_thread - pre-checked
1877 // java_thread - unchecked
1878 // depth - pre-checked as non-negative
1879 // value_ptr - pre-checked for NULL
1880 jvmtiError
1881 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
1882 // rm object is created to clean up the javaVFrame created in
1883 // doit_prologue(), but after doit() is finished with it.
1884 ResourceMark rm;
1886 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
1887 VMThread::execute(&op);
1888 *value_ptr = op.value().d;
1889 return op.result();
1890 } /* end GetLocalDouble */
1893 // Threads_lock NOT held, java_thread not protected by lock
1894 // java_thread - pre-checked
1895 // java_thread - unchecked
1896 // depth - pre-checked as non-negative
1897 jvmtiError
1898 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
1899 // rm object is created to clean up the javaVFrame created in
1900 // doit_prologue(), but after doit() is finished with it.
1901 ResourceMark rm;
1902 jvalue val;
1903 val.l = value;
1904 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
1905 VMThread::execute(&op);
1906 return op.result();
1907 } /* end SetLocalObject */
1910 // Threads_lock NOT held, java_thread not protected by lock
1911 // java_thread - pre-checked
1912 // java_thread - unchecked
1913 // depth - pre-checked as non-negative
1914 jvmtiError
1915 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
1916 // rm object is created to clean up the javaVFrame created in
1917 // doit_prologue(), but after doit() is finished with it.
1918 ResourceMark rm;
1919 jvalue val;
1920 val.i = value;
1921 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
1922 VMThread::execute(&op);
1923 return op.result();
1924 } /* end SetLocalInt */
1927 // Threads_lock NOT held, java_thread not protected by lock
1928 // java_thread - pre-checked
1929 // java_thread - unchecked
1930 // depth - pre-checked as non-negative
1931 jvmtiError
1932 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
1933 // rm object is created to clean up the javaVFrame created in
1934 // doit_prologue(), but after doit() is finished with it.
1935 ResourceMark rm;
1936 jvalue val;
1937 val.j = value;
1938 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
1939 VMThread::execute(&op);
1940 return op.result();
1941 } /* end SetLocalLong */
1944 // Threads_lock NOT held, java_thread not protected by lock
1945 // java_thread - pre-checked
1946 // java_thread - unchecked
1947 // depth - pre-checked as non-negative
1948 jvmtiError
1949 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
1950 // rm object is created to clean up the javaVFrame created in
1951 // doit_prologue(), but after doit() is finished with it.
1952 ResourceMark rm;
1953 jvalue val;
1954 val.f = value;
1955 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
1956 VMThread::execute(&op);
1957 return op.result();
1958 } /* end SetLocalFloat */
1961 // Threads_lock NOT held, java_thread not protected by lock
1962 // java_thread - pre-checked
1963 // java_thread - unchecked
1964 // depth - pre-checked as non-negative
1965 jvmtiError
1966 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
1967 // rm object is created to clean up the javaVFrame created in
1968 // doit_prologue(), but after doit() is finished with it.
1969 ResourceMark rm;
1970 jvalue val;
1971 val.d = value;
1972 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
1973 VMThread::execute(&op);
1974 return op.result();
1975 } /* end SetLocalDouble */
1978 //
1979 // Breakpoint functions
1980 //
1982 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
1983 jvmtiError
1984 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
1985 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
1986 if (location < 0) { // simple invalid location check first
1987 return JVMTI_ERROR_INVALID_LOCATION;
1988 }
1989 // verify that the breakpoint is not past the end of the method
1990 if (location >= (jlocation) method_oop->code_size()) {
1991 return JVMTI_ERROR_INVALID_LOCATION;
1992 }
1994 ResourceMark rm;
1995 JvmtiBreakpoint bp(method_oop, location);
1996 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
1997 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
1998 return JVMTI_ERROR_DUPLICATE;
2000 if (TraceJVMTICalls) {
2001 jvmti_breakpoints.print();
2002 }
2004 return JVMTI_ERROR_NONE;
2005 } /* end SetBreakpoint */
2008 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2009 jvmtiError
2010 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2011 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2013 if (location < 0) { // simple invalid location check first
2014 return JVMTI_ERROR_INVALID_LOCATION;
2015 }
2017 // verify that the breakpoint is not past the end of the method
2018 if (location >= (jlocation) method_oop->code_size()) {
2019 return JVMTI_ERROR_INVALID_LOCATION;
2020 }
2022 JvmtiBreakpoint bp(method_oop, location);
2024 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2025 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2026 return JVMTI_ERROR_NOT_FOUND;
2028 if (TraceJVMTICalls) {
2029 jvmti_breakpoints.print();
2030 }
2032 return JVMTI_ERROR_NONE;
2033 } /* end ClearBreakpoint */
2036 //
2037 // Watched Field functions
2038 //
2040 jvmtiError
2041 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2042 // make sure we haven't set this watch before
2043 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2044 fdesc_ptr->set_is_field_access_watched(true);
2046 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2048 return JVMTI_ERROR_NONE;
2049 } /* end SetFieldAccessWatch */
2052 jvmtiError
2053 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2054 // make sure we have a watch to clear
2055 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2056 fdesc_ptr->set_is_field_access_watched(false);
2058 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2060 return JVMTI_ERROR_NONE;
2061 } /* end ClearFieldAccessWatch */
2064 jvmtiError
2065 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2066 // make sure we haven't set this watch before
2067 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2068 fdesc_ptr->set_is_field_modification_watched(true);
2070 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2072 return JVMTI_ERROR_NONE;
2073 } /* end SetFieldModificationWatch */
2076 jvmtiError
2077 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2078 // make sure we have a watch to clear
2079 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2080 fdesc_ptr->set_is_field_modification_watched(false);
2082 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2084 return JVMTI_ERROR_NONE;
2085 } /* end ClearFieldModificationWatch */
2087 //
2088 // Class functions
2089 //
2092 // k_mirror - may be primitive, this must be checked
2093 // signature_ptr - NULL is a valid value, must be checked
2094 // generic_ptr - NULL is a valid value, must be checked
2095 jvmtiError
2096 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2097 ResourceMark rm;
2098 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2099 Klass* k = NULL;
2100 if (!isPrimitive) {
2101 k = java_lang_Class::as_Klass(k_mirror);
2102 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2103 }
2104 if (signature_ptr != NULL) {
2105 char* result = NULL;
2106 if (isPrimitive) {
2107 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2108 result = (char*) jvmtiMalloc(2);
2109 result[0] = tchar;
2110 result[1] = '\0';
2111 } else {
2112 const char* class_sig = k->signature_name();
2113 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2114 strcpy(result, class_sig);
2115 }
2116 *signature_ptr = result;
2117 }
2118 if (generic_ptr != NULL) {
2119 *generic_ptr = NULL;
2120 if (!isPrimitive && k->oop_is_instance()) {
2121 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2122 if (soo != NULL) {
2123 const char *gen_sig = soo->as_C_string();
2124 if (gen_sig != NULL) {
2125 char* gen_result;
2126 jvmtiError err = allocate(strlen(gen_sig) + 1,
2127 (unsigned char **)&gen_result);
2128 if (err != JVMTI_ERROR_NONE) {
2129 return err;
2130 }
2131 strcpy(gen_result, gen_sig);
2132 *generic_ptr = gen_result;
2133 }
2134 }
2135 }
2136 }
2137 return JVMTI_ERROR_NONE;
2138 } /* end GetClassSignature */
2141 // k_mirror - may be primitive, this must be checked
2142 // status_ptr - pre-checked for NULL
2143 jvmtiError
2144 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2145 jint result = 0;
2146 if (java_lang_Class::is_primitive(k_mirror)) {
2147 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2148 } else {
2149 Klass* k = java_lang_Class::as_Klass(k_mirror);
2150 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2151 result = k->jvmti_class_status();
2152 }
2153 *status_ptr = result;
2155 return JVMTI_ERROR_NONE;
2156 } /* end GetClassStatus */
2159 // k_mirror - may be primitive, this must be checked
2160 // source_name_ptr - pre-checked for NULL
2161 jvmtiError
2162 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2163 if (java_lang_Class::is_primitive(k_mirror)) {
2164 return JVMTI_ERROR_ABSENT_INFORMATION;
2165 }
2166 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2167 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2169 if (!k_klass->oop_is_instance()) {
2170 return JVMTI_ERROR_ABSENT_INFORMATION;
2171 }
2173 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2174 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2175 {
2176 JavaThread* current_thread = JavaThread::current();
2177 ResourceMark rm(current_thread);
2178 const char* sfncp = (const char*) sfnOop->as_C_string();
2179 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2180 strcpy(*source_name_ptr, sfncp);
2181 }
2183 return JVMTI_ERROR_NONE;
2184 } /* end GetSourceFileName */
2187 // k_mirror - may be primitive, this must be checked
2188 // modifiers_ptr - pre-checked for NULL
2189 jvmtiError
2190 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2191 JavaThread* current_thread = JavaThread::current();
2192 jint result = 0;
2193 if (!java_lang_Class::is_primitive(k_mirror)) {
2194 Klass* k = java_lang_Class::as_Klass(k_mirror);
2195 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2196 result = k->compute_modifier_flags(current_thread);
2197 JavaThread* THREAD = current_thread; // pass to macros
2198 if (HAS_PENDING_EXCEPTION) {
2199 CLEAR_PENDING_EXCEPTION;
2200 return JVMTI_ERROR_INTERNAL;
2201 };
2203 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2204 if(k->is_super()) {
2205 result |= JVM_ACC_SUPER;
2206 }
2207 } else {
2208 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2209 }
2210 *modifiers_ptr = result;
2212 return JVMTI_ERROR_NONE;
2213 } /* end GetClassModifiers */
2216 // k_mirror - may be primitive, this must be checked
2217 // method_count_ptr - pre-checked for NULL
2218 // methods_ptr - pre-checked for NULL
2219 jvmtiError
2220 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2221 JavaThread* current_thread = JavaThread::current();
2222 HandleMark hm(current_thread);
2224 if (java_lang_Class::is_primitive(k_mirror)) {
2225 *method_count_ptr = 0;
2226 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2227 return JVMTI_ERROR_NONE;
2228 }
2229 Klass* k = java_lang_Class::as_Klass(k_mirror);
2230 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2232 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2233 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2234 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2235 }
2237 if (!k->oop_is_instance()) {
2238 *method_count_ptr = 0;
2239 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2240 return JVMTI_ERROR_NONE;
2241 }
2242 instanceKlassHandle instanceK_h(current_thread, k);
2243 // Allocate the result and fill it in
2244 int result_length = instanceK_h->methods()->length();
2245 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2246 int index;
2247 if (JvmtiExport::can_maintain_original_method_order()) {
2248 // Use the original method ordering indices stored in the class, so we can emit
2249 // jmethodIDs in the order they appeared in the class file
2250 for (index = 0; index < result_length; index++) {
2251 Method* m = instanceK_h->methods()->at(index);
2252 int original_index = instanceK_h->method_ordering()->at(index);
2253 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2254 jmethodID id = m->jmethod_id();
2255 result_list[original_index] = id;
2256 }
2257 } else {
2258 // otherwise just copy in any order
2259 for (index = 0; index < result_length; index++) {
2260 Method* m = instanceK_h->methods()->at(index);
2261 jmethodID id = m->jmethod_id();
2262 result_list[index] = id;
2263 }
2264 }
2265 // Fill in return value.
2266 *method_count_ptr = result_length;
2267 *methods_ptr = result_list;
2269 return JVMTI_ERROR_NONE;
2270 } /* end GetClassMethods */
2273 // k_mirror - may be primitive, this must be checked
2274 // field_count_ptr - pre-checked for NULL
2275 // fields_ptr - pre-checked for NULL
2276 jvmtiError
2277 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2278 if (java_lang_Class::is_primitive(k_mirror)) {
2279 *field_count_ptr = 0;
2280 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2281 return JVMTI_ERROR_NONE;
2282 }
2283 JavaThread* current_thread = JavaThread::current();
2284 HandleMark hm(current_thread);
2285 Klass* k = java_lang_Class::as_Klass(k_mirror);
2286 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2288 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2289 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2290 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2291 }
2293 if (!k->oop_is_instance()) {
2294 *field_count_ptr = 0;
2295 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2296 return JVMTI_ERROR_NONE;
2297 }
2300 instanceKlassHandle instanceK_h(current_thread, k);
2302 int result_count = 0;
2303 // First, count the fields.
2304 FilteredFieldStream flds(instanceK_h, true, true);
2305 result_count = flds.field_count();
2307 // Allocate the result and fill it in
2308 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2309 // The JVMTI spec requires fields in the order they occur in the class file,
2310 // this is the reverse order of what FieldStream hands out.
2311 int id_index = (result_count - 1);
2313 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) {
2314 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2315 instanceK_h, src_st.offset(),
2316 src_st.access_flags().is_static());
2317 }
2318 assert(id_index == -1, "just checking");
2319 // Fill in the results
2320 *field_count_ptr = result_count;
2321 *fields_ptr = result_list;
2323 return JVMTI_ERROR_NONE;
2324 } /* end GetClassFields */
2327 // k_mirror - may be primitive, this must be checked
2328 // interface_count_ptr - pre-checked for NULL
2329 // interfaces_ptr - pre-checked for NULL
2330 jvmtiError
2331 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2332 {
2333 if (java_lang_Class::is_primitive(k_mirror)) {
2334 *interface_count_ptr = 0;
2335 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2336 return JVMTI_ERROR_NONE;
2337 }
2338 JavaThread* current_thread = JavaThread::current();
2339 HandleMark hm(current_thread);
2340 Klass* k = java_lang_Class::as_Klass(k_mirror);
2341 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2343 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2344 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2345 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2347 if (!k->oop_is_instance()) {
2348 *interface_count_ptr = 0;
2349 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2350 return JVMTI_ERROR_NONE;
2351 }
2353 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2354 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2355 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2356 for (int i_index = 0; i_index < result_length; i_index += 1) {
2357 Klass* klass_at = interface_list->at(i_index);
2358 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2359 assert(klass_at->is_interface(), "interfaces must be interfaces");
2360 oop mirror_at = klass_at->java_mirror();
2361 Handle handle_at = Handle(current_thread, mirror_at);
2362 result_list[i_index] = (jclass) jni_reference(handle_at);
2363 }
2364 *interface_count_ptr = result_length;
2365 *interfaces_ptr = result_list;
2366 }
2368 return JVMTI_ERROR_NONE;
2369 } /* end GetImplementedInterfaces */
2372 // k_mirror - may be primitive, this must be checked
2373 // minor_version_ptr - pre-checked for NULL
2374 // major_version_ptr - pre-checked for NULL
2375 jvmtiError
2376 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2377 if (java_lang_Class::is_primitive(k_mirror)) {
2378 return JVMTI_ERROR_ABSENT_INFORMATION;
2379 }
2380 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2381 Thread *thread = Thread::current();
2382 HandleMark hm(thread);
2383 KlassHandle klass(thread, k_oop);
2385 jint status = klass->jvmti_class_status();
2386 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2387 return JVMTI_ERROR_INVALID_CLASS;
2388 }
2389 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2390 return JVMTI_ERROR_ABSENT_INFORMATION;
2391 }
2393 instanceKlassHandle ik(thread, k_oop);
2394 *minor_version_ptr = ik->minor_version();
2395 *major_version_ptr = ik->major_version();
2397 return JVMTI_ERROR_NONE;
2398 } /* end GetClassVersionNumbers */
2401 // k_mirror - may be primitive, this must be checked
2402 // constant_pool_count_ptr - pre-checked for NULL
2403 // constant_pool_byte_count_ptr - pre-checked for NULL
2404 // constant_pool_bytes_ptr - pre-checked for NULL
2405 jvmtiError
2406 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2407 if (java_lang_Class::is_primitive(k_mirror)) {
2408 return JVMTI_ERROR_ABSENT_INFORMATION;
2409 }
2411 Klass* k_oop = java_lang_Class::as_Klass(k_mirror);
2412 Thread *thread = Thread::current();
2413 HandleMark hm(thread);
2414 ResourceMark rm(thread);
2415 KlassHandle klass(thread, k_oop);
2417 jint status = klass->jvmti_class_status();
2418 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2419 return JVMTI_ERROR_INVALID_CLASS;
2420 }
2421 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2422 return JVMTI_ERROR_ABSENT_INFORMATION;
2423 }
2425 instanceKlassHandle ikh(thread, k_oop);
2426 constantPoolHandle constants(thread, ikh->constants());
2427 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it
2429 JvmtiConstantPoolReconstituter reconstituter(ikh);
2430 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2431 return reconstituter.get_error();
2432 }
2434 unsigned char *cpool_bytes;
2435 int cpool_size = reconstituter.cpool_size();
2436 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2437 return reconstituter.get_error();
2438 }
2439 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2440 if (res != JVMTI_ERROR_NONE) {
2441 return res;
2442 }
2443 reconstituter.copy_cpool_bytes(cpool_bytes);
2444 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2445 return reconstituter.get_error();
2446 }
2448 *constant_pool_count_ptr = constants->length();
2449 *constant_pool_byte_count_ptr = cpool_size;
2450 *constant_pool_bytes_ptr = cpool_bytes;
2452 return JVMTI_ERROR_NONE;
2453 } /* end GetConstantPool */
2456 // k_mirror - may be primitive, this must be checked
2457 // is_interface_ptr - pre-checked for NULL
2458 jvmtiError
2459 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2460 {
2461 bool result = false;
2462 if (!java_lang_Class::is_primitive(k_mirror)) {
2463 Klass* k = java_lang_Class::as_Klass(k_mirror);
2464 if (k != NULL && k->is_interface()) {
2465 result = true;
2466 }
2467 }
2468 *is_interface_ptr = result;
2469 }
2471 return JVMTI_ERROR_NONE;
2472 } /* end IsInterface */
2475 // k_mirror - may be primitive, this must be checked
2476 // is_array_class_ptr - pre-checked for NULL
2477 jvmtiError
2478 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2479 {
2480 bool result = false;
2481 if (!java_lang_Class::is_primitive(k_mirror)) {
2482 Klass* k = java_lang_Class::as_Klass(k_mirror);
2483 if (k != NULL && k->oop_is_array()) {
2484 result = true;
2485 }
2486 }
2487 *is_array_class_ptr = result;
2488 }
2490 return JVMTI_ERROR_NONE;
2491 } /* end IsArrayClass */
2494 // k_mirror - may be primitive, this must be checked
2495 // classloader_ptr - pre-checked for NULL
2496 jvmtiError
2497 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2498 {
2499 if (java_lang_Class::is_primitive(k_mirror)) {
2500 *classloader_ptr = (jclass) jni_reference(Handle());
2501 return JVMTI_ERROR_NONE;
2502 }
2503 JavaThread* current_thread = JavaThread::current();
2504 HandleMark hm(current_thread);
2505 Klass* k = java_lang_Class::as_Klass(k_mirror);
2506 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2508 oop result_oop = k->class_loader();
2509 if (result_oop == NULL) {
2510 *classloader_ptr = (jclass) jni_reference(Handle());
2511 return JVMTI_ERROR_NONE;
2512 }
2513 Handle result_handle = Handle(current_thread, result_oop);
2514 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2515 *classloader_ptr = result_jnihandle;
2516 }
2517 return JVMTI_ERROR_NONE;
2518 } /* end GetClassLoader */
2521 // k_mirror - may be primitive, this must be checked
2522 // source_debug_extension_ptr - pre-checked for NULL
2523 jvmtiError
2524 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2525 {
2526 if (java_lang_Class::is_primitive(k_mirror)) {
2527 return JVMTI_ERROR_ABSENT_INFORMATION;
2528 }
2529 Klass* k = java_lang_Class::as_Klass(k_mirror);
2530 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2531 if (!k->oop_is_instance()) {
2532 return JVMTI_ERROR_ABSENT_INFORMATION;
2533 }
2534 char* sde = InstanceKlass::cast(k)->source_debug_extension();
2535 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2537 {
2538 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2539 strcpy(*source_debug_extension_ptr, sde);
2540 }
2541 }
2543 return JVMTI_ERROR_NONE;
2544 } /* end GetSourceDebugExtension */
2546 //
2547 // Object functions
2548 //
2550 // hash_code_ptr - pre-checked for NULL
2551 jvmtiError
2552 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2553 oop mirror = JNIHandles::resolve_external_guard(object);
2554 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2555 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2557 {
2558 jint result = (jint) mirror->identity_hash();
2559 *hash_code_ptr = result;
2560 }
2561 return JVMTI_ERROR_NONE;
2562 } /* end GetObjectHashCode */
2565 // info_ptr - pre-checked for NULL
2566 jvmtiError
2567 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2568 JavaThread* calling_thread = JavaThread::current();
2569 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2570 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2571 // Some of the critical threads were not suspended. go to a safepoint and try again
2572 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2573 VMThread::execute(&op);
2574 err = op.result();
2575 }
2576 return err;
2577 } /* end GetObjectMonitorUsage */
2580 //
2581 // Field functions
2582 //
2584 // name_ptr - NULL is a valid value, must be checked
2585 // signature_ptr - NULL is a valid value, must be checked
2586 // generic_ptr - NULL is a valid value, must be checked
2587 jvmtiError
2588 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2589 JavaThread* current_thread = JavaThread::current();
2590 ResourceMark rm(current_thread);
2591 if (name_ptr == NULL) {
2592 // just don't return the name
2593 } else {
2594 const char* fieldName = fdesc_ptr->name()->as_C_string();
2595 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2596 if (*name_ptr == NULL)
2597 return JVMTI_ERROR_OUT_OF_MEMORY;
2598 strcpy(*name_ptr, fieldName);
2599 }
2600 if (signature_ptr== NULL) {
2601 // just don't return the signature
2602 } else {
2603 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2604 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2605 if (*signature_ptr == NULL)
2606 return JVMTI_ERROR_OUT_OF_MEMORY;
2607 strcpy(*signature_ptr, fieldSignature);
2608 }
2609 if (generic_ptr != NULL) {
2610 *generic_ptr = NULL;
2611 Symbol* soop = fdesc_ptr->generic_signature();
2612 if (soop != NULL) {
2613 const char* gen_sig = soop->as_C_string();
2614 if (gen_sig != NULL) {
2615 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2616 if (err != JVMTI_ERROR_NONE) {
2617 return err;
2618 }
2619 strcpy(*generic_ptr, gen_sig);
2620 }
2621 }
2622 }
2623 return JVMTI_ERROR_NONE;
2624 } /* end GetFieldName */
2627 // declaring_class_ptr - pre-checked for NULL
2628 jvmtiError
2629 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2631 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2632 return JVMTI_ERROR_NONE;
2633 } /* end GetFieldDeclaringClass */
2636 // modifiers_ptr - pre-checked for NULL
2637 jvmtiError
2638 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2640 AccessFlags resultFlags = fdesc_ptr->access_flags();
2641 jint result = resultFlags.as_int();
2642 *modifiers_ptr = result;
2644 return JVMTI_ERROR_NONE;
2645 } /* end GetFieldModifiers */
2648 // is_synthetic_ptr - pre-checked for NULL
2649 jvmtiError
2650 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2651 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2652 return JVMTI_ERROR_NONE;
2653 } /* end IsFieldSynthetic */
2656 //
2657 // Method functions
2658 //
2660 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2661 // name_ptr - NULL is a valid value, must be checked
2662 // signature_ptr - NULL is a valid value, must be checked
2663 // generic_ptr - NULL is a valid value, must be checked
2664 jvmtiError
2665 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2666 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2667 JavaThread* current_thread = JavaThread::current();
2669 ResourceMark rm(current_thread); // get the utf8 name and signature
2670 if (name_ptr == NULL) {
2671 // just don't return the name
2672 } else {
2673 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2674 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2675 strcpy(*name_ptr, utf8_name);
2676 }
2677 if (signature_ptr == NULL) {
2678 // just don't return the signature
2679 } else {
2680 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2681 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2682 strcpy(*signature_ptr, utf8_signature);
2683 }
2685 if (generic_ptr != NULL) {
2686 *generic_ptr = NULL;
2687 Symbol* soop = method_oop->generic_signature();
2688 if (soop != NULL) {
2689 const char* gen_sig = soop->as_C_string();
2690 if (gen_sig != NULL) {
2691 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2692 if (err != JVMTI_ERROR_NONE) {
2693 return err;
2694 }
2695 strcpy(*generic_ptr, gen_sig);
2696 }
2697 }
2698 }
2699 return JVMTI_ERROR_NONE;
2700 } /* end GetMethodName */
2703 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2704 // declaring_class_ptr - pre-checked for NULL
2705 jvmtiError
2706 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2707 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2708 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2709 return JVMTI_ERROR_NONE;
2710 } /* end GetMethodDeclaringClass */
2713 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2714 // modifiers_ptr - pre-checked for NULL
2715 jvmtiError
2716 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2717 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2718 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2719 return JVMTI_ERROR_NONE;
2720 } /* end GetMethodModifiers */
2723 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2724 // max_ptr - pre-checked for NULL
2725 jvmtiError
2726 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2727 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2728 // get max stack
2729 (*max_ptr) = method_oop->max_locals();
2730 return JVMTI_ERROR_NONE;
2731 } /* end GetMaxLocals */
2734 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2735 // size_ptr - pre-checked for NULL
2736 jvmtiError
2737 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
2738 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2739 // get size of arguments
2741 (*size_ptr) = method_oop->size_of_parameters();
2742 return JVMTI_ERROR_NONE;
2743 } /* end GetArgumentsSize */
2746 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2747 // entry_count_ptr - pre-checked for NULL
2748 // table_ptr - pre-checked for NULL
2749 jvmtiError
2750 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
2751 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2752 if (!method_oop->has_linenumber_table()) {
2753 return (JVMTI_ERROR_ABSENT_INFORMATION);
2754 }
2756 // The line number table is compressed so we don't know how big it is until decompressed.
2757 // Decompression is really fast so we just do it twice.
2759 // Compute size of table
2760 jint num_entries = 0;
2761 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2762 while (stream.read_pair()) {
2763 num_entries++;
2764 }
2765 jvmtiLineNumberEntry *jvmti_table =
2766 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
2768 // Fill jvmti table
2769 if (num_entries > 0) {
2770 int index = 0;
2771 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
2772 while (stream.read_pair()) {
2773 jvmti_table[index].start_location = (jlocation) stream.bci();
2774 jvmti_table[index].line_number = (jint) stream.line();
2775 index++;
2776 }
2777 assert(index == num_entries, "sanity check");
2778 }
2780 // Set up results
2781 (*entry_count_ptr) = num_entries;
2782 (*table_ptr) = jvmti_table;
2784 return JVMTI_ERROR_NONE;
2785 } /* end GetLineNumberTable */
2788 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2789 // start_location_ptr - pre-checked for NULL
2790 // end_location_ptr - pre-checked for NULL
2791 jvmtiError
2792 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
2794 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2795 // get start and end location
2796 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
2797 if (method_oop->code_size() == 0) {
2798 // there is no code so there is no start location
2799 (*start_location_ptr) = (jlocation)(-1);
2800 } else {
2801 (*start_location_ptr) = (jlocation)(0);
2802 }
2804 return JVMTI_ERROR_NONE;
2805 } /* end GetMethodLocation */
2808 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2809 // entry_count_ptr - pre-checked for NULL
2810 // table_ptr - pre-checked for NULL
2811 jvmtiError
2812 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
2814 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2815 JavaThread* current_thread = JavaThread::current();
2817 // does the klass have any local variable information?
2818 InstanceKlass* ik = method_oop->method_holder();
2819 if (!ik->access_flags().has_localvariable_table()) {
2820 return (JVMTI_ERROR_ABSENT_INFORMATION);
2821 }
2823 ConstantPool* constants = method_oop->constants();
2824 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
2826 // in the vm localvariable table representation, 6 consecutive elements in the table
2827 // represent a 6-tuple of shorts
2828 // [start_pc, length, name_index, descriptor_index, signature_index, index]
2829 jint num_entries = method_oop->localvariable_table_length();
2830 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
2831 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
2833 if (num_entries > 0) {
2834 LocalVariableTableElement* table = method_oop->localvariable_table_start();
2835 for (int i = 0; i < num_entries; i++) {
2836 // get the 5 tuple information from the vm table
2837 jlocation start_location = (jlocation) table[i].start_bci;
2838 jint length = (jint) table[i].length;
2839 int name_index = (int) table[i].name_cp_index;
2840 int signature_index = (int) table[i].descriptor_cp_index;
2841 int generic_signature_index = (int) table[i].signature_cp_index;
2842 jint slot = (jint) table[i].slot;
2844 // get utf8 name and signature
2845 char *name_buf = NULL;
2846 char *sig_buf = NULL;
2847 char *gen_sig_buf = NULL;
2848 {
2849 ResourceMark rm(current_thread);
2851 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
2852 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2853 strcpy(name_buf, utf8_name);
2855 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
2856 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
2857 strcpy(sig_buf, utf8_signature);
2859 if (generic_signature_index > 0) {
2860 const char *utf8_gen_sign = (const char *)
2861 constants->symbol_at(generic_signature_index)->as_utf8();
2862 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
2863 strcpy(gen_sig_buf, utf8_gen_sign);
2864 }
2865 }
2867 // fill in the jvmti local variable table
2868 jvmti_table[i].start_location = start_location;
2869 jvmti_table[i].length = length;
2870 jvmti_table[i].name = name_buf;
2871 jvmti_table[i].signature = sig_buf;
2872 jvmti_table[i].generic_signature = gen_sig_buf;
2873 jvmti_table[i].slot = slot;
2874 }
2875 }
2877 // set results
2878 (*entry_count_ptr) = num_entries;
2879 (*table_ptr) = jvmti_table;
2881 return JVMTI_ERROR_NONE;
2882 } /* end GetLocalVariableTable */
2885 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2886 // bytecode_count_ptr - pre-checked for NULL
2887 // bytecodes_ptr - pre-checked for NULL
2888 jvmtiError
2889 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
2890 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2892 HandleMark hm;
2893 methodHandle method(method_oop);
2894 jint size = (jint)method->code_size();
2895 jvmtiError err = allocate(size, bytecodes_ptr);
2896 if (err != JVMTI_ERROR_NONE) {
2897 return err;
2898 }
2900 (*bytecode_count_ptr) = size;
2901 // get byte codes
2902 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
2904 return JVMTI_ERROR_NONE;
2905 } /* end GetBytecodes */
2908 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2909 // is_native_ptr - pre-checked for NULL
2910 jvmtiError
2911 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
2912 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2913 (*is_native_ptr) = method_oop->is_native();
2914 return JVMTI_ERROR_NONE;
2915 } /* end IsMethodNative */
2918 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2919 // is_synthetic_ptr - pre-checked for NULL
2920 jvmtiError
2921 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
2922 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2923 (*is_synthetic_ptr) = method_oop->is_synthetic();
2924 return JVMTI_ERROR_NONE;
2925 } /* end IsMethodSynthetic */
2928 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2929 // is_obsolete_ptr - pre-checked for NULL
2930 jvmtiError
2931 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
2932 if (use_version_1_0_semantics() &&
2933 get_capabilities()->can_redefine_classes == 0) {
2934 // This JvmtiEnv requested version 1.0 semantics and this function
2935 // requires the can_redefine_classes capability in version 1.0 so
2936 // we need to return an error here.
2937 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
2938 }
2940 if (method_oop == NULL || method_oop->is_obsolete()) {
2941 *is_obsolete_ptr = true;
2942 } else {
2943 *is_obsolete_ptr = false;
2944 }
2945 return JVMTI_ERROR_NONE;
2946 } /* end IsMethodObsolete */
2948 //
2949 // Raw Monitor functions
2950 //
2952 // name - pre-checked for NULL
2953 // monitor_ptr - pre-checked for NULL
2954 jvmtiError
2955 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
2956 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
2957 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
2959 *monitor_ptr = (jrawMonitorID)rmonitor;
2961 return JVMTI_ERROR_NONE;
2962 } /* end CreateRawMonitor */
2965 // rmonitor - pre-checked for validity
2966 jvmtiError
2967 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
2968 if (Threads::number_of_threads() == 0) {
2969 // Remove this monitor from pending raw monitors list
2970 // if it has entered in onload or start phase.
2971 JvmtiPendingMonitors::destroy(rmonitor);
2972 } else {
2973 Thread* thread = Thread::current();
2974 if (rmonitor->is_entered(thread)) {
2975 // The caller owns this monitor which we are about to destroy.
2976 // We exit the underlying synchronization object so that the
2977 // "delete monitor" call below can work without an assertion
2978 // failure on systems that don't like destroying synchronization
2979 // objects that are locked.
2980 int r;
2981 intptr_t recursion = rmonitor->recursions();
2982 for (intptr_t i=0; i <= recursion; i++) {
2983 r = rmonitor->raw_exit(thread);
2984 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
2985 if (r != ObjectMonitor::OM_OK) { // robustness
2986 return JVMTI_ERROR_INTERNAL;
2987 }
2988 }
2989 }
2990 if (rmonitor->owner() != NULL) {
2991 // The caller is trying to destroy a monitor that is locked by
2992 // someone else. While this is not forbidden by the JVMTI
2993 // spec, it will cause an assertion failure on systems that don't
2994 // like destroying synchronization objects that are locked.
2995 // We indicate a problem with the error return (and leak the
2996 // monitor's memory).
2997 return JVMTI_ERROR_NOT_MONITOR_OWNER;
2998 }
2999 }
3001 delete rmonitor;
3003 return JVMTI_ERROR_NONE;
3004 } /* end DestroyRawMonitor */
3007 // rmonitor - pre-checked for validity
3008 jvmtiError
3009 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3010 if (Threads::number_of_threads() == 0) {
3011 // No JavaThreads exist so ObjectMonitor enter cannot be
3012 // used, add this raw monitor to the pending list.
3013 // The pending monitors will be actually entered when
3014 // the VM is setup.
3015 // See transition_pending_raw_monitors in create_vm()
3016 // in thread.cpp.
3017 JvmtiPendingMonitors::enter(rmonitor);
3018 } else {
3019 int r = 0;
3020 Thread* thread = Thread::current();
3022 if (thread->is_Java_thread()) {
3023 JavaThread* current_thread = (JavaThread*)thread;
3025 #ifdef PROPER_TRANSITIONS
3026 // Not really unknown but ThreadInVMfromNative does more than we want
3027 ThreadInVMfromUnknown __tiv;
3028 {
3029 ThreadBlockInVM __tbivm(current_thread);
3030 r = rmonitor->raw_enter(current_thread);
3031 }
3032 #else
3033 /* Transition to thread_blocked without entering vm state */
3034 /* This is really evil. Normally you can't undo _thread_blocked */
3035 /* transitions like this because it would cause us to miss a */
3036 /* safepoint but since the thread was already in _thread_in_native */
3037 /* the thread is not leaving a safepoint safe state and it will */
3038 /* block when it tries to return from native. We can't safepoint */
3039 /* block in here because we could deadlock the vmthread. Blech. */
3041 JavaThreadState state = current_thread->thread_state();
3042 assert(state == _thread_in_native, "Must be _thread_in_native");
3043 // frame should already be walkable since we are in native
3044 assert(!current_thread->has_last_Java_frame() ||
3045 current_thread->frame_anchor()->walkable(), "Must be walkable");
3046 current_thread->set_thread_state(_thread_blocked);
3048 r = rmonitor->raw_enter(current_thread);
3049 // restore state, still at a safepoint safe state
3050 current_thread->set_thread_state(state);
3052 #endif /* PROPER_TRANSITIONS */
3053 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3054 } else {
3055 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3056 r = rmonitor->raw_enter(thread);
3057 } else {
3058 ShouldNotReachHere();
3059 }
3060 }
3062 if (r != ObjectMonitor::OM_OK) { // robustness
3063 return JVMTI_ERROR_INTERNAL;
3064 }
3065 }
3066 return JVMTI_ERROR_NONE;
3067 } /* end RawMonitorEnter */
3070 // rmonitor - pre-checked for validity
3071 jvmtiError
3072 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3073 jvmtiError err = JVMTI_ERROR_NONE;
3075 if (Threads::number_of_threads() == 0) {
3076 // No JavaThreads exist so just remove this monitor from the pending list.
3077 // Bool value from exit is false if rmonitor is not in the list.
3078 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3079 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3080 }
3081 } else {
3082 int r = 0;
3083 Thread* thread = Thread::current();
3085 if (thread->is_Java_thread()) {
3086 JavaThread* current_thread = (JavaThread*)thread;
3087 #ifdef PROPER_TRANSITIONS
3088 // Not really unknown but ThreadInVMfromNative does more than we want
3089 ThreadInVMfromUnknown __tiv;
3090 #endif /* PROPER_TRANSITIONS */
3091 r = rmonitor->raw_exit(current_thread);
3092 } else {
3093 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3094 r = rmonitor->raw_exit(thread);
3095 } else {
3096 ShouldNotReachHere();
3097 }
3098 }
3100 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3101 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3102 } else {
3103 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3104 if (r != ObjectMonitor::OM_OK) { // robustness
3105 err = JVMTI_ERROR_INTERNAL;
3106 }
3107 }
3108 }
3109 return err;
3110 } /* end RawMonitorExit */
3113 // rmonitor - pre-checked for validity
3114 jvmtiError
3115 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3116 int r = 0;
3117 Thread* thread = Thread::current();
3119 if (thread->is_Java_thread()) {
3120 JavaThread* current_thread = (JavaThread*)thread;
3121 #ifdef PROPER_TRANSITIONS
3122 // Not really unknown but ThreadInVMfromNative does more than we want
3123 ThreadInVMfromUnknown __tiv;
3124 {
3125 ThreadBlockInVM __tbivm(current_thread);
3126 r = rmonitor->raw_wait(millis, true, current_thread);
3127 }
3128 #else
3129 /* Transition to thread_blocked without entering vm state */
3130 /* This is really evil. Normally you can't undo _thread_blocked */
3131 /* transitions like this because it would cause us to miss a */
3132 /* safepoint but since the thread was already in _thread_in_native */
3133 /* the thread is not leaving a safepoint safe state and it will */
3134 /* block when it tries to return from native. We can't safepoint */
3135 /* block in here because we could deadlock the vmthread. Blech. */
3137 JavaThreadState state = current_thread->thread_state();
3138 assert(state == _thread_in_native, "Must be _thread_in_native");
3139 // frame should already be walkable since we are in native
3140 assert(!current_thread->has_last_Java_frame() ||
3141 current_thread->frame_anchor()->walkable(), "Must be walkable");
3142 current_thread->set_thread_state(_thread_blocked);
3144 r = rmonitor->raw_wait(millis, true, current_thread);
3145 // restore state, still at a safepoint safe state
3146 current_thread->set_thread_state(state);
3148 #endif /* PROPER_TRANSITIONS */
3149 } else {
3150 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3151 r = rmonitor->raw_wait(millis, true, thread);
3152 } else {
3153 ShouldNotReachHere();
3154 }
3155 }
3157 switch (r) {
3158 case ObjectMonitor::OM_INTERRUPTED:
3159 return JVMTI_ERROR_INTERRUPT;
3160 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3161 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3162 }
3163 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3164 if (r != ObjectMonitor::OM_OK) { // robustness
3165 return JVMTI_ERROR_INTERNAL;
3166 }
3168 return JVMTI_ERROR_NONE;
3169 } /* end RawMonitorWait */
3172 // rmonitor - pre-checked for validity
3173 jvmtiError
3174 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3175 int r = 0;
3176 Thread* thread = Thread::current();
3178 if (thread->is_Java_thread()) {
3179 JavaThread* current_thread = (JavaThread*)thread;
3180 // Not really unknown but ThreadInVMfromNative does more than we want
3181 ThreadInVMfromUnknown __tiv;
3182 r = rmonitor->raw_notify(current_thread);
3183 } else {
3184 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3185 r = rmonitor->raw_notify(thread);
3186 } else {
3187 ShouldNotReachHere();
3188 }
3189 }
3191 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3192 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3193 }
3194 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3195 if (r != ObjectMonitor::OM_OK) { // robustness
3196 return JVMTI_ERROR_INTERNAL;
3197 }
3199 return JVMTI_ERROR_NONE;
3200 } /* end RawMonitorNotify */
3203 // rmonitor - pre-checked for validity
3204 jvmtiError
3205 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3206 int r = 0;
3207 Thread* thread = Thread::current();
3209 if (thread->is_Java_thread()) {
3210 JavaThread* current_thread = (JavaThread*)thread;
3211 ThreadInVMfromUnknown __tiv;
3212 r = rmonitor->raw_notifyAll(current_thread);
3213 } else {
3214 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) {
3215 r = rmonitor->raw_notifyAll(thread);
3216 } else {
3217 ShouldNotReachHere();
3218 }
3219 }
3221 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3222 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3223 }
3224 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3225 if (r != ObjectMonitor::OM_OK) { // robustness
3226 return JVMTI_ERROR_INTERNAL;
3227 }
3229 return JVMTI_ERROR_NONE;
3230 } /* end RawMonitorNotifyAll */
3233 //
3234 // JNI Function Interception functions
3235 //
3238 // function_table - pre-checked for NULL
3239 jvmtiError
3240 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3241 // Copy jni function table at safepoint.
3242 VM_JNIFunctionTableCopier copier(function_table);
3243 VMThread::execute(&copier);
3245 return JVMTI_ERROR_NONE;
3246 } /* end SetJNIFunctionTable */
3249 // function_table - pre-checked for NULL
3250 jvmtiError
3251 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3252 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3253 if (*function_table == NULL)
3254 return JVMTI_ERROR_OUT_OF_MEMORY;
3255 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3256 return JVMTI_ERROR_NONE;
3257 } /* end GetJNIFunctionTable */
3260 //
3261 // Event Management functions
3262 //
3264 jvmtiError
3265 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3266 // can only generate two event types
3267 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3268 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3269 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3270 }
3272 // for compiled_method_load events we must check that the environment
3273 // has the can_generate_compiled_method_load_events capability.
3274 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3275 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3276 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3277 }
3278 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3279 } else {
3280 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3281 }
3283 } /* end GenerateEvents */
3286 //
3287 // Extension Mechanism functions
3288 //
3290 // extension_count_ptr - pre-checked for NULL
3291 // extensions - pre-checked for NULL
3292 jvmtiError
3293 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3294 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3295 } /* end GetExtensionFunctions */
3298 // extension_count_ptr - pre-checked for NULL
3299 // extensions - pre-checked for NULL
3300 jvmtiError
3301 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3302 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3303 } /* end GetExtensionEvents */
3306 // callback - NULL is a valid value, must be checked
3307 jvmtiError
3308 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3309 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3310 } /* end SetExtensionEventCallback */
3312 //
3313 // Timers functions
3314 //
3316 // info_ptr - pre-checked for NULL
3317 jvmtiError
3318 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3319 os::current_thread_cpu_time_info(info_ptr);
3320 return JVMTI_ERROR_NONE;
3321 } /* end GetCurrentThreadCpuTimerInfo */
3324 // nanos_ptr - pre-checked for NULL
3325 jvmtiError
3326 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3327 *nanos_ptr = os::current_thread_cpu_time();
3328 return JVMTI_ERROR_NONE;
3329 } /* end GetCurrentThreadCpuTime */
3332 // info_ptr - pre-checked for NULL
3333 jvmtiError
3334 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3335 os::thread_cpu_time_info(info_ptr);
3336 return JVMTI_ERROR_NONE;
3337 } /* end GetThreadCpuTimerInfo */
3340 // Threads_lock NOT held, java_thread not protected by lock
3341 // java_thread - pre-checked
3342 // nanos_ptr - pre-checked for NULL
3343 jvmtiError
3344 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3345 *nanos_ptr = os::thread_cpu_time(java_thread);
3346 return JVMTI_ERROR_NONE;
3347 } /* end GetThreadCpuTime */
3350 // info_ptr - pre-checked for NULL
3351 jvmtiError
3352 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3353 os::javaTimeNanos_info(info_ptr);
3354 return JVMTI_ERROR_NONE;
3355 } /* end GetTimerInfo */
3358 // nanos_ptr - pre-checked for NULL
3359 jvmtiError
3360 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3361 *nanos_ptr = os::javaTimeNanos();
3362 return JVMTI_ERROR_NONE;
3363 } /* end GetTime */
3366 // processor_count_ptr - pre-checked for NULL
3367 jvmtiError
3368 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3369 *processor_count_ptr = os::active_processor_count();
3370 return JVMTI_ERROR_NONE;
3371 } /* end GetAvailableProcessors */
3373 //
3374 // System Properties functions
3375 //
3377 // count_ptr - pre-checked for NULL
3378 // property_ptr - pre-checked for NULL
3379 jvmtiError
3380 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3381 jvmtiError err = JVMTI_ERROR_NONE;
3383 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties());
3385 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3386 if (err != JVMTI_ERROR_NONE) {
3387 return err;
3388 }
3389 int i = 0 ;
3390 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) {
3391 const char *key = p->key();
3392 char **tmp_value = *property_ptr+i;
3393 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3394 if (err == JVMTI_ERROR_NONE) {
3395 strcpy(*tmp_value, key);
3396 } else {
3397 // clean up previously allocated memory.
3398 for (int j=0; j<i; j++) {
3399 Deallocate((unsigned char*)*property_ptr+j);
3400 }
3401 Deallocate((unsigned char*)property_ptr);
3402 break;
3403 }
3404 }
3405 return err;
3406 } /* end GetSystemProperties */
3409 // property - pre-checked for NULL
3410 // value_ptr - pre-checked for NULL
3411 jvmtiError
3412 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3413 jvmtiError err = JVMTI_ERROR_NONE;
3414 const char *value;
3416 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property);
3417 if (value == NULL) {
3418 err = JVMTI_ERROR_NOT_AVAILABLE;
3419 } else {
3420 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3421 if (err == JVMTI_ERROR_NONE) {
3422 strcpy(*value_ptr, value);
3423 }
3424 }
3425 return err;
3426 } /* end GetSystemProperty */
3429 // property - pre-checked for NULL
3430 // value - NULL is a valid value, must be checked
3431 jvmtiError
3432 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3433 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3435 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3436 if (strcmp(property, p->key()) == 0) {
3437 if (p->set_value((char *)value_ptr)) {
3438 err = JVMTI_ERROR_NONE;
3439 }
3440 }
3441 }
3442 return err;
3443 } /* end SetSystemProperty */