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