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