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