1 /* 2 * Copyright (c) 2003, 2014, 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/classLoaderExt.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "interpreter/bytecodeStream.hpp" 30 #include "interpreter/interpreter.hpp" 31 #include "jvmtifiles/jvmtiEnv.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "memory/universe.inline.hpp" 34 #include "oops/instanceKlass.hpp" 35 #include "prims/jniCheck.hpp" 36 #include "prims/jvm_misc.hpp" 37 #include "prims/jvmtiAgentThread.hpp" 38 #include "prims/jvmtiClassFileReconstituter.hpp" 39 #include "prims/jvmtiCodeBlobEvents.hpp" 40 #include "prims/jvmtiExtensions.hpp" 41 #include "prims/jvmtiGetLoadedClasses.hpp" 42 #include "prims/jvmtiImpl.hpp" 43 #include "prims/jvmtiManageCapabilities.hpp" 44 #include "prims/jvmtiRawMonitor.hpp" 45 #include "prims/jvmtiRedefineClasses.hpp" 46 #include "prims/jvmtiTagMap.hpp" 47 #include "prims/jvmtiThreadState.inline.hpp" 48 #include "prims/jvmtiUtil.hpp" 49 #include "runtime/arguments.hpp" 50 #include "runtime/deoptimization.hpp" 51 #include "runtime/interfaceSupport.hpp" 52 #include "runtime/javaCalls.hpp" 53 #include "runtime/jfieldIDWorkaround.hpp" 54 #include "runtime/osThread.hpp" 55 #include "runtime/reflectionUtils.hpp" 56 #include "runtime/signature.hpp" 57 #include "runtime/thread.inline.hpp" 58 #include "runtime/vframe.hpp" 59 #include "runtime/vmThread.hpp" 60 #include "services/threadService.hpp" 61 #include "utilities/exceptions.hpp" 62 #include "utilities/preserveException.hpp" 63 64 65 #define FIXLATER 0 // REMOVE this when completed. 66 67 // FIXLATER: hook into JvmtiTrace 68 #define TraceJVMTICalls false 69 70 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) { 71 } 72 73 JvmtiEnv::~JvmtiEnv() { 74 } 75 76 JvmtiEnv* 77 JvmtiEnv::create_a_jvmti(jint version) { 78 return new JvmtiEnv(version); 79 } 80 81 // VM operation class to copy jni function table at safepoint. 82 // More than one java threads or jvmti agents may be reading/ 83 // modifying jni function tables. To reduce the risk of bad 84 // interaction b/w these threads it is copied at safepoint. 85 class VM_JNIFunctionTableCopier : public VM_Operation { 86 private: 87 const struct JNINativeInterface_ *_function_table; 88 public: 89 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) { 90 _function_table = func_tbl; 91 }; 92 93 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; } 94 void doit() { 95 copy_jni_function_table(_function_table); 96 }; 97 }; 98 99 // 100 // Do not change the "prefix" marker below, everything above it is copied 101 // unchanged into the filled stub, everything below is controlled by the 102 // stub filler (only method bodies are carried forward, and then only for 103 // functionality still in the spec). 104 // 105 // end file prefix 106 107 // 108 // Memory Management functions 109 // 110 111 // mem_ptr - pre-checked for NULL 112 jvmtiError 113 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) { 114 return allocate(size, mem_ptr); 115 } /* end Allocate */ 116 117 118 // mem - NULL is a valid value, must be checked 119 jvmtiError 120 JvmtiEnv::Deallocate(unsigned char* mem) { 121 return deallocate(mem); 122 } /* end Deallocate */ 123 124 // Threads_lock NOT held, java_thread not protected by lock 125 // java_thread - pre-checked 126 // data - NULL is a valid value, must be checked 127 jvmtiError 128 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) { 129 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 130 if (state == NULL) { 131 if (data == NULL) { 132 // leaving state unset same as data set to NULL 133 return JVMTI_ERROR_NONE; 134 } 135 // otherwise, create the state 136 state = JvmtiThreadState::state_for(java_thread); 137 if (state == NULL) { 138 return JVMTI_ERROR_THREAD_NOT_ALIVE; 139 } 140 } 141 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data); 142 return JVMTI_ERROR_NONE; 143 } /* end SetThreadLocalStorage */ 144 145 146 // Threads_lock NOT held 147 // thread - NOT pre-checked 148 // data_ptr - pre-checked for NULL 149 jvmtiError 150 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) { 151 JavaThread* current_thread = JavaThread::current(); 152 if (thread == NULL) { 153 JvmtiThreadState* state = current_thread->jvmti_thread_state(); 154 *data_ptr = (state == NULL) ? NULL : 155 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 156 } else { 157 158 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition 159 // the thread to _thread_in_vm. However, when the TLS for a thread 160 // other than the current thread is required we need to transition 161 // from native so as to resolve the jthread. 162 163 ThreadInVMfromNative __tiv(current_thread); 164 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread) 165 debug_only(VMNativeEntryWrapper __vew;) 166 167 oop thread_oop = JNIHandles::resolve_external_guard(thread); 168 if (thread_oop == NULL) { 169 return JVMTI_ERROR_INVALID_THREAD; 170 } 171 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 172 return JVMTI_ERROR_INVALID_THREAD; 173 } 174 JavaThread* java_thread = java_lang_Thread::thread(thread_oop); 175 if (java_thread == NULL) { 176 return JVMTI_ERROR_THREAD_NOT_ALIVE; 177 } 178 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 179 *data_ptr = (state == NULL) ? NULL : 180 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 181 } 182 return JVMTI_ERROR_NONE; 183 } /* end GetThreadLocalStorage */ 184 185 // 186 // Class functions 187 // 188 189 // class_count_ptr - pre-checked for NULL 190 // classes_ptr - pre-checked for NULL 191 jvmtiError 192 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) { 193 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr); 194 } /* end GetLoadedClasses */ 195 196 197 // initiating_loader - NULL is a valid value, must be checked 198 // class_count_ptr - pre-checked for NULL 199 // classes_ptr - pre-checked for NULL 200 jvmtiError 201 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) { 202 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader, 203 class_count_ptr, classes_ptr); 204 } /* end GetClassLoaderClasses */ 205 206 // k_mirror - may be primitive, this must be checked 207 // is_modifiable_class_ptr - pre-checked for NULL 208 jvmtiError 209 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) { 210 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)? 211 JNI_TRUE : JNI_FALSE; 212 return JVMTI_ERROR_NONE; 213 } /* end IsModifiableClass */ 214 215 // class_count - pre-checked to be greater than or equal to 0 216 // classes - pre-checked for NULL 217 jvmtiError 218 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) { 219 //TODO: add locking 220 221 int index; 222 JavaThread* current_thread = JavaThread::current(); 223 ResourceMark rm(current_thread); 224 225 jvmtiClassDefinition* class_definitions = 226 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count); 227 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY); 228 229 for (index = 0; index < class_count; index++) { 230 HandleMark hm(current_thread); 231 232 jclass jcls = classes[index]; 233 oop k_mirror = JNIHandles::resolve_external_guard(jcls); 234 if (k_mirror == NULL) { 235 return JVMTI_ERROR_INVALID_CLASS; 236 } 237 if (!k_mirror->is_a(SystemDictionary::Class_klass())) { 238 return JVMTI_ERROR_INVALID_CLASS; 239 } 240 241 if (java_lang_Class::is_primitive(k_mirror)) { 242 return JVMTI_ERROR_UNMODIFIABLE_CLASS; 243 } 244 245 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 246 KlassHandle klass(current_thread, k_oop); 247 248 jint status = klass->jvmti_class_status(); 249 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 250 return JVMTI_ERROR_INVALID_CLASS; 251 } 252 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 253 return JVMTI_ERROR_UNMODIFIABLE_CLASS; 254 } 255 256 instanceKlassHandle ikh(current_thread, k_oop); 257 if (ikh->get_cached_class_file_bytes() == NULL) { 258 // Not cached, we need to reconstitute the class file from the 259 // VM representation. We don't attach the reconstituted class 260 // bytes to the InstanceKlass here because they have not been 261 // validated and we're not at a safepoint. 262 JvmtiClassFileReconstituter reconstituter(ikh); 263 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 264 return reconstituter.get_error(); 265 } 266 267 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size(); 268 class_definitions[index].class_bytes = (unsigned char*) 269 reconstituter.class_file_bytes(); 270 } else { 271 // it is cached, get it from the cache 272 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len(); 273 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes(); 274 } 275 class_definitions[index].klass = jcls; 276 } 277 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform); 278 VMThread::execute(&op); 279 return (op.check_error()); 280 } /* end RetransformClasses */ 281 282 283 // class_count - pre-checked to be greater than or equal to 0 284 // class_definitions - pre-checked for NULL 285 jvmtiError 286 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) { 287 //TODO: add locking 288 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine); 289 VMThread::execute(&op); 290 return (op.check_error()); 291 } /* end RedefineClasses */ 292 293 294 // 295 // Object functions 296 // 297 298 // size_ptr - pre-checked for NULL 299 jvmtiError 300 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) { 301 oop mirror = JNIHandles::resolve_external_guard(object); 302 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 303 304 if (mirror->klass() == SystemDictionary::Class_klass() && 305 !java_lang_Class::is_primitive(mirror)) { 306 Klass* k = java_lang_Class::as_Klass(mirror); 307 assert(k != NULL, "class for non-primitive mirror must exist"); 308 *size_ptr = (jlong)k->size() * wordSize; 309 } else { 310 *size_ptr = (jlong)mirror->size() * wordSize; 311 } 312 return JVMTI_ERROR_NONE; 313 } /* end GetObjectSize */ 314 315 // 316 // Method functions 317 // 318 319 // prefix - NULL is a valid value, must be checked 320 jvmtiError 321 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) { 322 return prefix == NULL? 323 SetNativeMethodPrefixes(0, NULL) : 324 SetNativeMethodPrefixes(1, (char**)&prefix); 325 } /* end SetNativeMethodPrefix */ 326 327 328 // prefix_count - pre-checked to be greater than or equal to 0 329 // prefixes - pre-checked for NULL 330 jvmtiError 331 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) { 332 // Have to grab JVMTI thread state lock to be sure that some thread 333 // isn't accessing the prefixes at the same time we are setting them. 334 // No locks during VM bring-up. 335 if (Threads::number_of_threads() == 0) { 336 return set_native_method_prefixes(prefix_count, prefixes); 337 } else { 338 MutexLocker mu(JvmtiThreadState_lock); 339 return set_native_method_prefixes(prefix_count, prefixes); 340 } 341 } /* end SetNativeMethodPrefixes */ 342 343 // 344 // Event Management functions 345 // 346 347 // callbacks - NULL is a valid value, must be checked 348 // size_of_callbacks - pre-checked to be greater than or equal to 0 349 jvmtiError 350 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) { 351 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks); 352 return JVMTI_ERROR_NONE; 353 } /* end SetEventCallbacks */ 354 355 356 // event_thread - NULL is a valid value, must be checked 357 jvmtiError 358 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) { 359 JavaThread* java_thread = NULL; 360 if (event_thread != NULL) { 361 oop thread_oop = JNIHandles::resolve_external_guard(event_thread); 362 if (thread_oop == NULL) { 363 return JVMTI_ERROR_INVALID_THREAD; 364 } 365 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 366 return JVMTI_ERROR_INVALID_THREAD; 367 } 368 java_thread = java_lang_Thread::thread(thread_oop); 369 if (java_thread == NULL) { 370 return JVMTI_ERROR_THREAD_NOT_ALIVE; 371 } 372 } 373 374 // event_type must be valid 375 if (!JvmtiEventController::is_valid_event_type(event_type)) { 376 return JVMTI_ERROR_INVALID_EVENT_TYPE; 377 } 378 379 // global events cannot be controlled at thread level. 380 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) { 381 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 382 } 383 384 bool enabled = (mode == JVMTI_ENABLE); 385 386 // assure that needed capabilities are present 387 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { 388 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 389 } 390 391 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { 392 record_class_file_load_hook_enabled(); 393 } 394 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled); 395 396 return JVMTI_ERROR_NONE; 397 } /* end SetEventNotificationMode */ 398 399 // 400 // Capability functions 401 // 402 403 // capabilities_ptr - pre-checked for NULL 404 jvmtiError 405 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) { 406 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(), 407 get_prohibited_capabilities(), 408 capabilities_ptr); 409 return JVMTI_ERROR_NONE; 410 } /* end GetPotentialCapabilities */ 411 412 413 // capabilities_ptr - pre-checked for NULL 414 jvmtiError 415 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) { 416 return JvmtiManageCapabilities::add_capabilities(get_capabilities(), 417 get_prohibited_capabilities(), 418 capabilities_ptr, 419 get_capabilities()); 420 } /* end AddCapabilities */ 421 422 423 // capabilities_ptr - pre-checked for NULL 424 jvmtiError 425 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) { 426 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities()); 427 return JVMTI_ERROR_NONE; 428 } /* end RelinquishCapabilities */ 429 430 431 // capabilities_ptr - pre-checked for NULL 432 jvmtiError 433 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) { 434 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr); 435 return JVMTI_ERROR_NONE; 436 } /* end GetCapabilities */ 437 438 // 439 // Class Loader Search functions 440 // 441 442 // segment - pre-checked for NULL 443 jvmtiError 444 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) { 445 jvmtiPhase phase = get_phase(); 446 if (phase == JVMTI_PHASE_ONLOAD) { 447 Arguments::append_sysclasspath(segment); 448 return JVMTI_ERROR_NONE; 449 } else if (use_version_1_0_semantics()) { 450 // This JvmtiEnv requested version 1.0 semantics and this function 451 // is only allowed in the ONLOAD phase in version 1.0 so we need to 452 // return an error here. 453 return JVMTI_ERROR_WRONG_PHASE; 454 } else if (phase == JVMTI_PHASE_LIVE) { 455 // The phase is checked by the wrapper that called this function, 456 // but this thread could be racing with the thread that is 457 // terminating the VM so we check one more time. 458 459 // create the zip entry 460 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment); 461 if (zip_entry == NULL) { 462 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 463 } 464 465 // lock the loader 466 Thread* thread = Thread::current(); 467 HandleMark hm; 468 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock()); 469 470 ObjectLocker ol(loader_lock, thread); 471 472 // add the jar file to the bootclasspath 473 if (TraceClassLoading) { 474 tty->print_cr("[Opened %s]", zip_entry->name()); 475 } 476 ClassLoaderExt::append_boot_classpath(zip_entry); 477 return JVMTI_ERROR_NONE; 478 } else { 479 return JVMTI_ERROR_WRONG_PHASE; 480 } 481 482 } /* end AddToBootstrapClassLoaderSearch */ 483 484 485 // segment - pre-checked for NULL 486 jvmtiError 487 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) { 488 jvmtiPhase phase = get_phase(); 489 490 if (phase == JVMTI_PHASE_ONLOAD) { 491 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 492 if (strcmp("java.class.path", p->key()) == 0) { 493 p->append_value(segment); 494 break; 495 } 496 } 497 return JVMTI_ERROR_NONE; 498 } else if (phase == JVMTI_PHASE_LIVE) { 499 // The phase is checked by the wrapper that called this function, 500 // but this thread could be racing with the thread that is 501 // terminating the VM so we check one more time. 502 HandleMark hm; 503 504 // create the zip entry (which will open the zip file and hence 505 // check that the segment is indeed a zip file). 506 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment); 507 if (zip_entry == NULL) { 508 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 509 } 510 delete zip_entry; // no longer needed 511 512 // lock the loader 513 Thread* THREAD = Thread::current(); 514 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 515 516 ObjectLocker ol(loader, THREAD); 517 518 // need the path as java.lang.String 519 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD); 520 if (HAS_PENDING_EXCEPTION) { 521 CLEAR_PENDING_EXCEPTION; 522 return JVMTI_ERROR_INTERNAL; 523 } 524 525 instanceKlassHandle loader_ik(THREAD, loader->klass()); 526 527 // Invoke the appendToClassPathForInstrumentation method - if the method 528 // is not found it means the loader doesn't support adding to the class path 529 // in the live phase. 530 { 531 JavaValue res(T_VOID); 532 JavaCalls::call_special(&res, 533 loader, 534 loader_ik, 535 vmSymbols::appendToClassPathForInstrumentation_name(), 536 vmSymbols::appendToClassPathForInstrumentation_signature(), 537 path, 538 THREAD); 539 if (HAS_PENDING_EXCEPTION) { 540 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 541 CLEAR_PENDING_EXCEPTION; 542 543 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) { 544 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED; 545 } else { 546 return JVMTI_ERROR_INTERNAL; 547 } 548 } 549 } 550 551 return JVMTI_ERROR_NONE; 552 } else { 553 return JVMTI_ERROR_WRONG_PHASE; 554 } 555 } /* end AddToSystemClassLoaderSearch */ 556 557 // 558 // General functions 559 // 560 561 // phase_ptr - pre-checked for NULL 562 jvmtiError 563 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) { 564 *phase_ptr = get_phase(); 565 return JVMTI_ERROR_NONE; 566 } /* end GetPhase */ 567 568 569 jvmtiError 570 JvmtiEnv::DisposeEnvironment() { 571 dispose(); 572 return JVMTI_ERROR_NONE; 573 } /* end DisposeEnvironment */ 574 575 576 // data - NULL is a valid value, must be checked 577 jvmtiError 578 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) { 579 set_env_local_storage(data); 580 return JVMTI_ERROR_NONE; 581 } /* end SetEnvironmentLocalStorage */ 582 583 584 // data_ptr - pre-checked for NULL 585 jvmtiError 586 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) { 587 *data_ptr = (void*)get_env_local_storage(); 588 return JVMTI_ERROR_NONE; 589 } /* end GetEnvironmentLocalStorage */ 590 591 // version_ptr - pre-checked for NULL 592 jvmtiError 593 JvmtiEnv::GetVersionNumber(jint* version_ptr) { 594 *version_ptr = JVMTI_VERSION; 595 return JVMTI_ERROR_NONE; 596 } /* end GetVersionNumber */ 597 598 599 // name_ptr - pre-checked for NULL 600 jvmtiError 601 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) { 602 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) { 603 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 604 } 605 const char *name = JvmtiUtil::error_name(error); 606 if (name == NULL) { 607 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 608 } 609 size_t len = strlen(name) + 1; 610 jvmtiError err = allocate(len, (unsigned char**)name_ptr); 611 if (err == JVMTI_ERROR_NONE) { 612 memcpy(*name_ptr, name, len); 613 } 614 return err; 615 } /* end GetErrorName */ 616 617 618 jvmtiError 619 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) { 620 switch (flag) { 621 case JVMTI_VERBOSE_OTHER: 622 // ignore 623 break; 624 case JVMTI_VERBOSE_CLASS: 625 TraceClassLoading = value != 0; 626 TraceClassUnloading = value != 0; 627 break; 628 case JVMTI_VERBOSE_GC: 629 PrintGC = value != 0; 630 break; 631 case JVMTI_VERBOSE_JNI: 632 PrintJNIResolving = value != 0; 633 break; 634 default: 635 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 636 }; 637 return JVMTI_ERROR_NONE; 638 } /* end SetVerboseFlag */ 639 640 641 // format_ptr - pre-checked for NULL 642 jvmtiError 643 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) { 644 *format_ptr = JVMTI_JLOCATION_JVMBCI; 645 return JVMTI_ERROR_NONE; 646 } /* end GetJLocationFormat */ 647 648 // 649 // Thread functions 650 // 651 652 // Threads_lock NOT held 653 // thread - NOT pre-checked 654 // thread_state_ptr - pre-checked for NULL 655 jvmtiError 656 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) { 657 jint state; 658 oop thread_oop; 659 JavaThread* thr; 660 661 if (thread == NULL) { 662 thread_oop = JavaThread::current()->threadObj(); 663 } else { 664 thread_oop = JNIHandles::resolve_external_guard(thread); 665 } 666 667 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 668 return JVMTI_ERROR_INVALID_THREAD; 669 } 670 671 // get most state bits 672 state = (jint)java_lang_Thread::get_thread_status(thread_oop); 673 674 // add more state bits 675 thr = java_lang_Thread::thread(thread_oop); 676 if (thr != NULL) { 677 JavaThreadState jts = thr->thread_state(); 678 679 if (thr->is_being_ext_suspended()) { 680 state |= JVMTI_THREAD_STATE_SUSPENDED; 681 } 682 if (jts == _thread_in_native) { 683 state |= JVMTI_THREAD_STATE_IN_NATIVE; 684 } 685 OSThread* osThread = thr->osthread(); 686 if (osThread != NULL && osThread->interrupted()) { 687 state |= JVMTI_THREAD_STATE_INTERRUPTED; 688 } 689 } 690 691 *thread_state_ptr = state; 692 return JVMTI_ERROR_NONE; 693 } /* end GetThreadState */ 694 695 696 // thread_ptr - pre-checked for NULL 697 jvmtiError 698 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) { 699 JavaThread* current_thread = JavaThread::current(); 700 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj()); 701 return JVMTI_ERROR_NONE; 702 } /* end GetCurrentThread */ 703 704 705 // threads_count_ptr - pre-checked for NULL 706 // threads_ptr - pre-checked for NULL 707 jvmtiError 708 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) { 709 int nthreads = 0; 710 Handle *thread_objs = NULL; 711 ResourceMark rm; 712 HandleMark hm; 713 714 // enumerate threads (including agent threads) 715 ThreadsListEnumerator tle(Thread::current(), true); 716 nthreads = tle.num_threads(); 717 *threads_count_ptr = nthreads; 718 719 if (nthreads == 0) { 720 *threads_ptr = NULL; 721 return JVMTI_ERROR_NONE; 722 } 723 724 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads); 725 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY); 726 727 for (int i=0; i < nthreads; i++) { 728 thread_objs[i] = Handle(tle.get_threadObj(i)); 729 } 730 731 // have to make global handles outside of Threads_lock 732 jthread *jthreads = new_jthreadArray(nthreads, thread_objs); 733 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY); 734 735 *threads_ptr = jthreads; 736 return JVMTI_ERROR_NONE; 737 } /* end GetAllThreads */ 738 739 740 // Threads_lock NOT held, java_thread not protected by lock 741 // java_thread - pre-checked 742 jvmtiError 743 JvmtiEnv::SuspendThread(JavaThread* java_thread) { 744 // don't allow hidden thread suspend request. 745 if (java_thread->is_hidden_from_external_view()) { 746 return (JVMTI_ERROR_NONE); 747 } 748 749 { 750 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 751 if (java_thread->is_external_suspend()) { 752 // don't allow nested external suspend requests. 753 return (JVMTI_ERROR_THREAD_SUSPENDED); 754 } 755 if (java_thread->is_exiting()) { // thread is in the process of exiting 756 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 757 } 758 java_thread->set_external_suspend(); 759 } 760 761 if (!JvmtiSuspendControl::suspend(java_thread)) { 762 // the thread was in the process of exiting 763 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 764 } 765 return JVMTI_ERROR_NONE; 766 } /* end SuspendThread */ 767 768 769 // request_count - pre-checked to be greater than or equal to 0 770 // request_list - pre-checked for NULL 771 // results - pre-checked for NULL 772 jvmtiError 773 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 774 int needSafepoint = 0; // > 0 if we need a safepoint 775 for (int i = 0; i < request_count; i++) { 776 JavaThread *java_thread = get_JavaThread(request_list[i]); 777 if (java_thread == NULL) { 778 results[i] = JVMTI_ERROR_INVALID_THREAD; 779 continue; 780 } 781 // the thread has not yet run or has exited (not on threads list) 782 if (java_thread->threadObj() == NULL) { 783 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 784 continue; 785 } 786 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) { 787 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 788 continue; 789 } 790 // don't allow hidden thread suspend request. 791 if (java_thread->is_hidden_from_external_view()) { 792 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 793 continue; 794 } 795 796 { 797 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 798 if (java_thread->is_external_suspend()) { 799 // don't allow nested external suspend requests. 800 results[i] = JVMTI_ERROR_THREAD_SUSPENDED; 801 continue; 802 } 803 if (java_thread->is_exiting()) { // thread is in the process of exiting 804 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 805 continue; 806 } 807 java_thread->set_external_suspend(); 808 } 809 if (java_thread->thread_state() == _thread_in_native) { 810 // We need to try and suspend native threads here. Threads in 811 // other states will self-suspend on their next transition. 812 if (!JvmtiSuspendControl::suspend(java_thread)) { 813 // The thread was in the process of exiting. Force another 814 // safepoint to make sure that this thread transitions. 815 needSafepoint++; 816 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 817 continue; 818 } 819 } else { 820 needSafepoint++; 821 } 822 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 823 } 824 if (needSafepoint > 0) { 825 VM_ForceSafepoint vfs; 826 VMThread::execute(&vfs); 827 } 828 // per-thread suspend results returned via results parameter 829 return JVMTI_ERROR_NONE; 830 } /* end SuspendThreadList */ 831 832 833 // Threads_lock NOT held, java_thread not protected by lock 834 // java_thread - pre-checked 835 jvmtiError 836 JvmtiEnv::ResumeThread(JavaThread* java_thread) { 837 // don't allow hidden thread resume request. 838 if (java_thread->is_hidden_from_external_view()) { 839 return JVMTI_ERROR_NONE; 840 } 841 842 if (!java_thread->is_being_ext_suspended()) { 843 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 844 } 845 846 if (!JvmtiSuspendControl::resume(java_thread)) { 847 return JVMTI_ERROR_INTERNAL; 848 } 849 return JVMTI_ERROR_NONE; 850 } /* end ResumeThread */ 851 852 853 // request_count - pre-checked to be greater than or equal to 0 854 // request_list - pre-checked for NULL 855 // results - pre-checked for NULL 856 jvmtiError 857 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 858 for (int i = 0; i < request_count; i++) { 859 JavaThread *java_thread = get_JavaThread(request_list[i]); 860 if (java_thread == NULL) { 861 results[i] = JVMTI_ERROR_INVALID_THREAD; 862 continue; 863 } 864 // don't allow hidden thread resume request. 865 if (java_thread->is_hidden_from_external_view()) { 866 results[i] = JVMTI_ERROR_NONE; // indicate successful resume 867 continue; 868 } 869 if (!java_thread->is_being_ext_suspended()) { 870 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED; 871 continue; 872 } 873 874 if (!JvmtiSuspendControl::resume(java_thread)) { 875 results[i] = JVMTI_ERROR_INTERNAL; 876 continue; 877 } 878 879 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 880 } 881 // per-thread resume results returned via results parameter 882 return JVMTI_ERROR_NONE; 883 } /* end ResumeThreadList */ 884 885 886 // Threads_lock NOT held, java_thread not protected by lock 887 // java_thread - pre-checked 888 jvmtiError 889 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) { 890 oop e = JNIHandles::resolve_external_guard(exception); 891 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER); 892 893 JavaThread::send_async_exception(java_thread->threadObj(), e); 894 895 return JVMTI_ERROR_NONE; 896 897 } /* end StopThread */ 898 899 900 // Threads_lock NOT held 901 // thread - NOT pre-checked 902 jvmtiError 903 JvmtiEnv::InterruptThread(jthread thread) { 904 oop thread_oop = JNIHandles::resolve_external_guard(thread); 905 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) 906 return JVMTI_ERROR_INVALID_THREAD; 907 908 JavaThread* current_thread = JavaThread::current(); 909 910 // Todo: this is a duplicate of JVM_Interrupt; share code in future 911 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 912 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock); 913 // We need to re-resolve the java_thread, since a GC might have happened during the 914 // acquire of the lock 915 916 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread)); 917 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE); 918 919 Thread::interrupt(java_thread); 920 921 return JVMTI_ERROR_NONE; 922 } /* end InterruptThread */ 923 924 925 // Threads_lock NOT held 926 // thread - NOT pre-checked 927 // info_ptr - pre-checked for NULL 928 jvmtiError 929 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) { 930 ResourceMark rm; 931 HandleMark hm; 932 933 JavaThread* current_thread = JavaThread::current(); 934 935 // if thread is NULL the current thread is used 936 oop thread_oop; 937 if (thread == NULL) { 938 thread_oop = current_thread->threadObj(); 939 } else { 940 thread_oop = JNIHandles::resolve_external_guard(thread); 941 } 942 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) 943 return JVMTI_ERROR_INVALID_THREAD; 944 945 Handle thread_obj(current_thread, thread_oop); 946 Handle name; 947 ThreadPriority priority; 948 Handle thread_group; 949 Handle context_class_loader; 950 bool is_daemon; 951 952 { MutexLocker mu(Threads_lock); 953 954 name = Handle(current_thread, java_lang_Thread::name(thread_obj())); 955 priority = java_lang_Thread::priority(thread_obj()); 956 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj())); 957 is_daemon = java_lang_Thread::is_daemon(thread_obj()); 958 959 oop loader = java_lang_Thread::context_class_loader(thread_obj()); 960 context_class_loader = Handle(current_thread, loader); 961 } 962 { const char *n; 963 964 if (name() != NULL) { 965 n = java_lang_String::as_utf8_string(name()); 966 } else { 967 n = UNICODE::as_utf8(NULL, 0); 968 } 969 970 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1); 971 if (info_ptr->name == NULL) 972 return JVMTI_ERROR_OUT_OF_MEMORY; 973 974 strcpy(info_ptr->name, n); 975 } 976 info_ptr->is_daemon = is_daemon; 977 info_ptr->priority = priority; 978 979 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL : 980 jni_reference(context_class_loader); 981 info_ptr->thread_group = jni_reference(thread_group); 982 983 return JVMTI_ERROR_NONE; 984 } /* end GetThreadInfo */ 985 986 987 // Threads_lock NOT held, java_thread not protected by lock 988 // java_thread - pre-checked 989 // owned_monitor_count_ptr - pre-checked for NULL 990 // owned_monitors_ptr - pre-checked for NULL 991 jvmtiError 992 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) { 993 jvmtiError err = JVMTI_ERROR_NONE; 994 JavaThread* calling_thread = JavaThread::current(); 995 996 // growable array of jvmti monitors info on the C-heap 997 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 998 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 999 1000 // It is only safe to perform the direct operation on the current 1001 // thread. All other usage needs to use a vm-safepoint-op for safety. 1002 if (java_thread == calling_thread) { 1003 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1004 } else { 1005 // JVMTI get monitors info at safepoint. Do not require target thread to 1006 // be suspended. 1007 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); 1008 VMThread::execute(&op); 1009 err = op.result(); 1010 } 1011 jint owned_monitor_count = owned_monitors_list->length(); 1012 if (err == JVMTI_ERROR_NONE) { 1013 if ((err = allocate(owned_monitor_count * sizeof(jobject *), 1014 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) { 1015 // copy into the returned array 1016 for (int i = 0; i < owned_monitor_count; i++) { 1017 (*owned_monitors_ptr)[i] = 1018 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1019 } 1020 *owned_monitor_count_ptr = owned_monitor_count; 1021 } 1022 } 1023 // clean up. 1024 for (int i = 0; i < owned_monitor_count; i++) { 1025 deallocate((unsigned char*)owned_monitors_list->at(i)); 1026 } 1027 delete owned_monitors_list; 1028 1029 return err; 1030 } /* end GetOwnedMonitorInfo */ 1031 1032 1033 // Threads_lock NOT held, java_thread not protected by lock 1034 // java_thread - pre-checked 1035 // monitor_info_count_ptr - pre-checked for NULL 1036 // monitor_info_ptr - pre-checked for NULL 1037 jvmtiError 1038 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) { 1039 jvmtiError err = JVMTI_ERROR_NONE; 1040 JavaThread* calling_thread = JavaThread::current(); 1041 1042 // growable array of jvmti monitors info on the C-heap 1043 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1044 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 1045 1046 // It is only safe to perform the direct operation on the current 1047 // thread. All other usage needs to use a vm-safepoint-op for safety. 1048 if (java_thread == calling_thread) { 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 JavaThread* calling_thread = JavaThread::current(); 1090 1091 // It is only safe to perform the direct operation on the current 1092 // thread. All other usage needs to use a vm-safepoint-op for safety. 1093 if (java_thread == calling_thread) { 1094 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr); 1095 } else { 1096 // get contended monitor information at safepoint. 1097 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr); 1098 VMThread::execute(&op); 1099 err = op.result(); 1100 } 1101 return err; 1102 } /* end GetCurrentContendedMonitor */ 1103 1104 1105 // Threads_lock NOT held 1106 // thread - NOT pre-checked 1107 // proc - pre-checked for NULL 1108 // arg - NULL is a valid value, must be checked 1109 jvmtiError 1110 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) { 1111 oop thread_oop = JNIHandles::resolve_external_guard(thread); 1112 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 1113 return JVMTI_ERROR_INVALID_THREAD; 1114 } 1115 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) { 1116 return JVMTI_ERROR_INVALID_PRIORITY; 1117 } 1118 1119 //Thread-self 1120 JavaThread* current_thread = JavaThread::current(); 1121 1122 Handle thread_hndl(current_thread, thread_oop); 1123 { 1124 MutexLocker mu(Threads_lock); // grab Threads_lock 1125 1126 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg); 1127 1128 // At this point it may be possible that no osthread was created for the 1129 // JavaThread due to lack of memory. 1130 if (new_thread == NULL || new_thread->osthread() == NULL) { 1131 if (new_thread) delete new_thread; 1132 return JVMTI_ERROR_OUT_OF_MEMORY; 1133 } 1134 1135 java_lang_Thread::set_thread(thread_hndl(), new_thread); 1136 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority); 1137 java_lang_Thread::set_daemon(thread_hndl()); 1138 1139 new_thread->set_threadObj(thread_hndl()); 1140 Threads::add(new_thread); 1141 Thread::start(new_thread); 1142 } // unlock Threads_lock 1143 1144 return JVMTI_ERROR_NONE; 1145 } /* end RunAgentThread */ 1146 1147 // 1148 // Thread Group functions 1149 // 1150 1151 // group_count_ptr - pre-checked for NULL 1152 // groups_ptr - pre-checked for NULL 1153 jvmtiError 1154 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) { 1155 JavaThread* current_thread = JavaThread::current(); 1156 1157 // Only one top level thread group now. 1158 *group_count_ptr = 1; 1159 1160 // Allocate memory to store global-refs to the thread groups. 1161 // Assume this area is freed by caller. 1162 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr)); 1163 1164 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY); 1165 1166 // Convert oop to Handle, then convert Handle to global-ref. 1167 { 1168 HandleMark hm(current_thread); 1169 Handle system_thread_group(current_thread, Universe::system_thread_group()); 1170 *groups_ptr[0] = jni_reference(system_thread_group); 1171 } 1172 1173 return JVMTI_ERROR_NONE; 1174 } /* end GetTopThreadGroups */ 1175 1176 1177 // info_ptr - pre-checked for NULL 1178 jvmtiError 1179 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) { 1180 ResourceMark rm; 1181 HandleMark hm; 1182 1183 JavaThread* current_thread = JavaThread::current(); 1184 1185 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group)); 1186 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP); 1187 1188 typeArrayHandle name; 1189 Handle parent_group; 1190 bool is_daemon; 1191 ThreadPriority max_priority; 1192 1193 { MutexLocker mu(Threads_lock); 1194 1195 name = typeArrayHandle(current_thread, 1196 java_lang_ThreadGroup::name(group_obj())); 1197 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj())); 1198 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj()); 1199 max_priority = java_lang_ThreadGroup::maxPriority(group_obj()); 1200 } 1201 1202 info_ptr->is_daemon = is_daemon; 1203 info_ptr->max_priority = max_priority; 1204 info_ptr->parent = jni_reference(parent_group); 1205 1206 if (name() != NULL) { 1207 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); 1208 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1); 1209 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY); 1210 strcpy(info_ptr->name, n); 1211 } else { 1212 info_ptr->name = NULL; 1213 } 1214 1215 return JVMTI_ERROR_NONE; 1216 } /* end GetThreadGroupInfo */ 1217 1218 1219 // thread_count_ptr - pre-checked for NULL 1220 // threads_ptr - pre-checked for NULL 1221 // group_count_ptr - pre-checked for NULL 1222 // groups_ptr - pre-checked for NULL 1223 jvmtiError 1224 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) { 1225 JavaThread* current_thread = JavaThread::current(); 1226 oop group_obj = (oop) JNIHandles::resolve_external_guard(group); 1227 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP); 1228 1229 Handle *thread_objs = NULL; 1230 Handle *group_objs = NULL; 1231 int nthreads = 0; 1232 int ngroups = 0; 1233 int hidden_threads = 0; 1234 1235 ResourceMark rm; 1236 HandleMark hm; 1237 1238 Handle group_hdl(current_thread, group_obj); 1239 1240 { MutexLocker mu(Threads_lock); 1241 1242 nthreads = java_lang_ThreadGroup::nthreads(group_hdl()); 1243 ngroups = java_lang_ThreadGroup::ngroups(group_hdl()); 1244 1245 if (nthreads > 0) { 1246 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl()); 1247 assert(nthreads <= threads->length(), "too many threads"); 1248 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads); 1249 for (int i=0, j=0; i<nthreads; i++) { 1250 oop thread_obj = threads->obj_at(i); 1251 assert(thread_obj != NULL, "thread_obj is NULL"); 1252 JavaThread *javathread = java_lang_Thread::thread(thread_obj); 1253 // Filter out hidden java threads. 1254 if (javathread != NULL && javathread->is_hidden_from_external_view()) { 1255 hidden_threads++; 1256 continue; 1257 } 1258 thread_objs[j++] = Handle(current_thread, thread_obj); 1259 } 1260 nthreads -= hidden_threads; 1261 } 1262 if (ngroups > 0) { 1263 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl()); 1264 assert(ngroups <= groups->length(), "too many threads"); 1265 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups); 1266 for (int i=0; i<ngroups; i++) { 1267 oop group_obj = groups->obj_at(i); 1268 assert(group_obj != NULL, "group_obj != NULL"); 1269 group_objs[i] = Handle(current_thread, group_obj); 1270 } 1271 } 1272 } 1273 1274 // have to make global handles outside of Threads_lock 1275 *group_count_ptr = ngroups; 1276 *thread_count_ptr = nthreads; 1277 *threads_ptr = new_jthreadArray(nthreads, thread_objs); 1278 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs); 1279 if ((nthreads > 0) && (*threads_ptr == NULL)) { 1280 return JVMTI_ERROR_OUT_OF_MEMORY; 1281 } 1282 if ((ngroups > 0) && (*groups_ptr == NULL)) { 1283 return JVMTI_ERROR_OUT_OF_MEMORY; 1284 } 1285 1286 return JVMTI_ERROR_NONE; 1287 } /* end GetThreadGroupChildren */ 1288 1289 1290 // 1291 // Stack Frame functions 1292 // 1293 1294 // Threads_lock NOT held, java_thread not protected by lock 1295 // java_thread - pre-checked 1296 // max_frame_count - pre-checked to be greater than or equal to 0 1297 // frame_buffer - pre-checked for NULL 1298 // count_ptr - pre-checked for NULL 1299 jvmtiError 1300 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) { 1301 jvmtiError err = JVMTI_ERROR_NONE; 1302 1303 // It is only safe to perform the direct operation on the current 1304 // thread. All other usage needs to use a vm-safepoint-op for safety. 1305 if (java_thread == JavaThread::current()) { 1306 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1307 } else { 1308 // JVMTI get stack trace at safepoint. Do not require target thread to 1309 // be suspended. 1310 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1311 VMThread::execute(&op); 1312 err = op.result(); 1313 } 1314 1315 return err; 1316 } /* end GetStackTrace */ 1317 1318 1319 // max_frame_count - pre-checked to be greater than or equal to 0 1320 // stack_info_ptr - pre-checked for NULL 1321 // thread_count_ptr - pre-checked for NULL 1322 jvmtiError 1323 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) { 1324 jvmtiError err = JVMTI_ERROR_NONE; 1325 JavaThread* calling_thread = JavaThread::current(); 1326 1327 // JVMTI get stack traces at safepoint. 1328 VM_GetAllStackTraces op(this, calling_thread, max_frame_count); 1329 VMThread::execute(&op); 1330 *thread_count_ptr = op.final_thread_count(); 1331 *stack_info_ptr = op.stack_info(); 1332 err = op.result(); 1333 return err; 1334 } /* end GetAllStackTraces */ 1335 1336 1337 // thread_count - pre-checked to be greater than or equal to 0 1338 // thread_list - pre-checked for NULL 1339 // max_frame_count - pre-checked to be greater than or equal to 0 1340 // stack_info_ptr - pre-checked for NULL 1341 jvmtiError 1342 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) { 1343 jvmtiError err = JVMTI_ERROR_NONE; 1344 // JVMTI get stack traces at safepoint. 1345 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count); 1346 VMThread::execute(&op); 1347 err = op.result(); 1348 if (err == JVMTI_ERROR_NONE) { 1349 *stack_info_ptr = op.stack_info(); 1350 } 1351 return err; 1352 } /* end GetThreadListStackTraces */ 1353 1354 1355 // Threads_lock NOT held, java_thread not protected by lock 1356 // java_thread - pre-checked 1357 // count_ptr - pre-checked for NULL 1358 jvmtiError 1359 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) { 1360 jvmtiError err = JVMTI_ERROR_NONE; 1361 1362 // retrieve or create JvmtiThreadState. 1363 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1364 if (state == NULL) { 1365 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1366 } 1367 1368 // It is only safe to perform the direct operation on the current 1369 // thread. All other usage needs to use a vm-safepoint-op for safety. 1370 if (java_thread == JavaThread::current()) { 1371 err = get_frame_count(state, count_ptr); 1372 } else { 1373 // get java stack frame count at safepoint. 1374 VM_GetFrameCount op(this, state, count_ptr); 1375 VMThread::execute(&op); 1376 err = op.result(); 1377 } 1378 return err; 1379 } /* end GetFrameCount */ 1380 1381 1382 // Threads_lock NOT held, java_thread not protected by lock 1383 // java_thread - pre-checked 1384 jvmtiError 1385 JvmtiEnv::PopFrame(JavaThread* java_thread) { 1386 JavaThread* current_thread = JavaThread::current(); 1387 HandleMark hm(current_thread); 1388 uint32_t debug_bits = 0; 1389 1390 // retrieve or create the state 1391 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1392 if (state == NULL) { 1393 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1394 } 1395 1396 // Check if java_thread is fully suspended 1397 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) { 1398 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1399 } 1400 // Check to see if a PopFrame was already in progress 1401 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) { 1402 // Probably possible for JVMTI clients to trigger this, but the 1403 // JPDA backend shouldn't allow this to happen 1404 return JVMTI_ERROR_INTERNAL; 1405 } 1406 1407 { 1408 // Was workaround bug 1409 // 4812902: popFrame hangs if the method is waiting at a synchronize 1410 // Catch this condition and return an error to avoid hanging. 1411 // Now JVMTI spec allows an implementation to bail out with an opaque frame error. 1412 OSThread* osThread = java_thread->osthread(); 1413 if (osThread->get_state() == MONITOR_WAIT) { 1414 return JVMTI_ERROR_OPAQUE_FRAME; 1415 } 1416 } 1417 1418 { 1419 ResourceMark rm(current_thread); 1420 // Check if there are more than one Java frame in this thread, that the top two frames 1421 // are Java (not native) frames, and that there is no intervening VM frame 1422 int frame_count = 0; 1423 bool is_interpreted[2]; 1424 intptr_t *frame_sp[2]; 1425 // The 2-nd arg of constructor is needed to stop iterating at java entry frame. 1426 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) { 1427 methodHandle mh(current_thread, vfs.method()); 1428 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME); 1429 is_interpreted[frame_count] = vfs.is_interpreted_frame(); 1430 frame_sp[frame_count] = vfs.frame_id(); 1431 if (++frame_count > 1) break; 1432 } 1433 if (frame_count < 2) { 1434 // We haven't found two adjacent non-native Java frames on the top. 1435 // There can be two situations here: 1436 // 1. There are no more java frames 1437 // 2. Two top java frames are separated by non-java native frames 1438 if(vframeFor(java_thread, 1) == NULL) { 1439 return JVMTI_ERROR_NO_MORE_FRAMES; 1440 } else { 1441 // Intervening non-java native or VM frames separate java frames. 1442 // Current implementation does not support this. See bug #5031735. 1443 // In theory it is possible to pop frames in such cases. 1444 return JVMTI_ERROR_OPAQUE_FRAME; 1445 } 1446 } 1447 1448 // If any of the top 2 frames is a compiled one, need to deoptimize it 1449 for (int i = 0; i < 2; i++) { 1450 if (!is_interpreted[i]) { 1451 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]); 1452 } 1453 } 1454 1455 // Update the thread state to reflect that the top frame is popped 1456 // so that cur_stack_depth is maintained properly and all frameIDs 1457 // are invalidated. 1458 // The current frame will be popped later when the suspended thread 1459 // is resumed and right before returning from VM to Java. 1460 // (see call_VM_base() in assembler_<cpu>.cpp). 1461 1462 // It's fine to update the thread state here because no JVMTI events 1463 // shall be posted for this PopFrame. 1464 1465 // It is only safe to perform the direct operation on the current 1466 // thread. All other usage needs to use a vm-safepoint-op for safety. 1467 if (java_thread == JavaThread::current()) { 1468 state->update_for_pop_top_frame(); 1469 } else { 1470 VM_UpdateForPopTopFrame op(state); 1471 VMThread::execute(&op); 1472 jvmtiError err = op.result(); 1473 if (err != JVMTI_ERROR_NONE) { 1474 return err; 1475 } 1476 } 1477 1478 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit); 1479 // Set pending step flag for this popframe and it is cleared when next 1480 // step event is posted. 1481 state->set_pending_step_for_popframe(); 1482 } 1483 1484 return JVMTI_ERROR_NONE; 1485 } /* end PopFrame */ 1486 1487 1488 // Threads_lock NOT held, java_thread not protected by lock 1489 // java_thread - pre-checked 1490 // java_thread - unchecked 1491 // depth - pre-checked as non-negative 1492 // method_ptr - pre-checked for NULL 1493 // location_ptr - pre-checked for NULL 1494 jvmtiError 1495 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) { 1496 jvmtiError err = JVMTI_ERROR_NONE; 1497 1498 // It is only safe to perform the direct operation on the current 1499 // thread. All other usage needs to use a vm-safepoint-op for safety. 1500 if (java_thread == JavaThread::current()) { 1501 err = get_frame_location(java_thread, depth, method_ptr, location_ptr); 1502 } else { 1503 // JVMTI get java stack frame location at safepoint. 1504 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr); 1505 VMThread::execute(&op); 1506 err = op.result(); 1507 } 1508 return err; 1509 } /* end GetFrameLocation */ 1510 1511 1512 // Threads_lock NOT held, java_thread not protected by lock 1513 // java_thread - pre-checked 1514 // java_thread - unchecked 1515 // depth - pre-checked as non-negative 1516 jvmtiError 1517 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) { 1518 jvmtiError err = JVMTI_ERROR_NONE; 1519 ResourceMark rm; 1520 uint32_t debug_bits = 0; 1521 1522 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread); 1523 if (state == NULL) { 1524 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1525 } 1526 1527 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1528 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1529 } 1530 1531 if (TraceJVMTICalls) { 1532 JvmtiSuspendControl::print(); 1533 } 1534 1535 vframe *vf = vframeFor(java_thread, depth); 1536 if (vf == NULL) { 1537 return JVMTI_ERROR_NO_MORE_FRAMES; 1538 } 1539 1540 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) { 1541 return JVMTI_ERROR_OPAQUE_FRAME; 1542 } 1543 1544 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL"); 1545 1546 // It is only safe to perform the direct operation on the current 1547 // thread. All other usage needs to use a vm-safepoint-op for safety. 1548 if (java_thread == JavaThread::current()) { 1549 int frame_number = state->count_frames() - depth; 1550 state->env_thread_state(this)->set_frame_pop(frame_number); 1551 } else { 1552 VM_SetFramePop op(this, state, depth); 1553 VMThread::execute(&op); 1554 err = op.result(); 1555 } 1556 return err; 1557 } /* end NotifyFramePop */ 1558 1559 1560 // 1561 // Force Early Return functions 1562 // 1563 1564 // Threads_lock NOT held, java_thread not protected by lock 1565 // java_thread - pre-checked 1566 jvmtiError 1567 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) { 1568 jvalue val; 1569 val.l = value; 1570 return force_early_return(java_thread, val, atos); 1571 } /* end ForceEarlyReturnObject */ 1572 1573 1574 // Threads_lock NOT held, java_thread not protected by lock 1575 // java_thread - pre-checked 1576 jvmtiError 1577 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) { 1578 jvalue val; 1579 val.i = value; 1580 return force_early_return(java_thread, val, itos); 1581 } /* end ForceEarlyReturnInt */ 1582 1583 1584 // Threads_lock NOT held, java_thread not protected by lock 1585 // java_thread - pre-checked 1586 jvmtiError 1587 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) { 1588 jvalue val; 1589 val.j = value; 1590 return force_early_return(java_thread, val, ltos); 1591 } /* end ForceEarlyReturnLong */ 1592 1593 1594 // Threads_lock NOT held, java_thread not protected by lock 1595 // java_thread - pre-checked 1596 jvmtiError 1597 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) { 1598 jvalue val; 1599 val.f = value; 1600 return force_early_return(java_thread, val, ftos); 1601 } /* end ForceEarlyReturnFloat */ 1602 1603 1604 // Threads_lock NOT held, java_thread not protected by lock 1605 // java_thread - pre-checked 1606 jvmtiError 1607 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) { 1608 jvalue val; 1609 val.d = value; 1610 return force_early_return(java_thread, val, dtos); 1611 } /* end ForceEarlyReturnDouble */ 1612 1613 1614 // Threads_lock NOT held, java_thread not protected by lock 1615 // java_thread - pre-checked 1616 jvmtiError 1617 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) { 1618 jvalue val; 1619 val.j = 0L; 1620 return force_early_return(java_thread, val, vtos); 1621 } /* end ForceEarlyReturnVoid */ 1622 1623 1624 // 1625 // Heap functions 1626 // 1627 1628 // klass - NULL is a valid value, must be checked 1629 // initial_object - NULL is a valid value, must be checked 1630 // callbacks - pre-checked for NULL 1631 // user_data - NULL is a valid value, must be checked 1632 jvmtiError 1633 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1634 // check klass if provided 1635 Klass* k_oop = NULL; 1636 if (klass != NULL) { 1637 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1638 if (k_mirror == NULL) { 1639 return JVMTI_ERROR_INVALID_CLASS; 1640 } 1641 if (java_lang_Class::is_primitive(k_mirror)) { 1642 return JVMTI_ERROR_NONE; 1643 } 1644 k_oop = java_lang_Class::as_Klass(k_mirror); 1645 if (k_oop == NULL) { 1646 return JVMTI_ERROR_INVALID_CLASS; 1647 } 1648 } 1649 1650 Thread *thread = Thread::current(); 1651 HandleMark hm(thread); 1652 KlassHandle kh (thread, k_oop); 1653 1654 TraceTime t("FollowReferences", TraceJVMTIObjectTagging); 1655 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data); 1656 return JVMTI_ERROR_NONE; 1657 } /* end FollowReferences */ 1658 1659 1660 // klass - NULL is a valid value, must be checked 1661 // callbacks - pre-checked for NULL 1662 // user_data - NULL is a valid value, must be checked 1663 jvmtiError 1664 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1665 // check klass if provided 1666 Klass* k_oop = NULL; 1667 if (klass != NULL) { 1668 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1669 if (k_mirror == NULL) { 1670 return JVMTI_ERROR_INVALID_CLASS; 1671 } 1672 if (java_lang_Class::is_primitive(k_mirror)) { 1673 return JVMTI_ERROR_NONE; 1674 } 1675 k_oop = java_lang_Class::as_Klass(k_mirror); 1676 if (k_oop == NULL) { 1677 return JVMTI_ERROR_INVALID_CLASS; 1678 } 1679 } 1680 1681 Thread *thread = Thread::current(); 1682 HandleMark hm(thread); 1683 KlassHandle kh (thread, k_oop); 1684 1685 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging); 1686 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data); 1687 return JVMTI_ERROR_NONE; 1688 } /* end IterateThroughHeap */ 1689 1690 1691 // tag_ptr - pre-checked for NULL 1692 jvmtiError 1693 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) { 1694 oop o = JNIHandles::resolve_external_guard(object); 1695 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1696 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object); 1697 return JVMTI_ERROR_NONE; 1698 } /* end GetTag */ 1699 1700 1701 jvmtiError 1702 JvmtiEnv::SetTag(jobject object, jlong tag) { 1703 oop o = JNIHandles::resolve_external_guard(object); 1704 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1705 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag); 1706 return JVMTI_ERROR_NONE; 1707 } /* end SetTag */ 1708 1709 1710 // tag_count - pre-checked to be greater than or equal to 0 1711 // tags - pre-checked for NULL 1712 // count_ptr - pre-checked for NULL 1713 // object_result_ptr - NULL is a valid value, must be checked 1714 // tag_result_ptr - NULL is a valid value, must be checked 1715 jvmtiError 1716 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { 1717 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging); 1718 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr); 1719 } /* end GetObjectsWithTags */ 1720 1721 1722 jvmtiError 1723 JvmtiEnv::ForceGarbageCollection() { 1724 Universe::heap()->collect(GCCause::_jvmti_force_gc); 1725 return JVMTI_ERROR_NONE; 1726 } /* end ForceGarbageCollection */ 1727 1728 1729 // 1730 // Heap (1.0) functions 1731 // 1732 1733 // object_reference_callback - pre-checked for NULL 1734 // user_data - NULL is a valid value, must be checked 1735 jvmtiError 1736 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) { 1737 oop o = JNIHandles::resolve_external_guard(object); 1738 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1739 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data); 1740 return JVMTI_ERROR_NONE; 1741 } /* end IterateOverObjectsReachableFromObject */ 1742 1743 1744 // heap_root_callback - NULL is a valid value, must be checked 1745 // stack_ref_callback - NULL is a valid value, must be checked 1746 // object_ref_callback - NULL is a valid value, must be checked 1747 // user_data - NULL is a valid value, must be checked 1748 jvmtiError 1749 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) { 1750 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging); 1751 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data); 1752 return JVMTI_ERROR_NONE; 1753 } /* end IterateOverReachableObjects */ 1754 1755 1756 // heap_object_callback - pre-checked for NULL 1757 // user_data - NULL is a valid value, must be checked 1758 jvmtiError 1759 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1760 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging); 1761 Thread *thread = Thread::current(); 1762 HandleMark hm(thread); 1763 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data); 1764 return JVMTI_ERROR_NONE; 1765 } /* end IterateOverHeap */ 1766 1767 1768 // k_mirror - may be primitive, this must be checked 1769 // heap_object_callback - pre-checked for NULL 1770 // user_data - NULL is a valid value, must be checked 1771 jvmtiError 1772 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1773 if (java_lang_Class::is_primitive(k_mirror)) { 1774 // DO PRIMITIVE CLASS PROCESSING 1775 return JVMTI_ERROR_NONE; 1776 } 1777 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 1778 if (k_oop == NULL) { 1779 return JVMTI_ERROR_INVALID_CLASS; 1780 } 1781 Thread *thread = Thread::current(); 1782 HandleMark hm(thread); 1783 KlassHandle klass (thread, k_oop); 1784 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging); 1785 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data); 1786 return JVMTI_ERROR_NONE; 1787 } /* end IterateOverInstancesOfClass */ 1788 1789 1790 // 1791 // Local Variable functions 1792 // 1793 1794 // Threads_lock NOT held, java_thread not protected by lock 1795 // java_thread - pre-checked 1796 // java_thread - unchecked 1797 // depth - pre-checked as non-negative 1798 // value_ptr - pre-checked for NULL 1799 jvmtiError 1800 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) { 1801 JavaThread* current_thread = JavaThread::current(); 1802 // rm object is created to clean up the javaVFrame created in 1803 // doit_prologue(), but after doit() is finished with it. 1804 ResourceMark rm(current_thread); 1805 1806 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot); 1807 VMThread::execute(&op); 1808 jvmtiError err = op.result(); 1809 if (err != JVMTI_ERROR_NONE) { 1810 return err; 1811 } else { 1812 *value_ptr = op.value().l; 1813 return JVMTI_ERROR_NONE; 1814 } 1815 } /* end GetLocalObject */ 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 - pre-checked for NULL 1822 jvmtiError 1823 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){ 1824 JavaThread* current_thread = JavaThread::current(); 1825 // rm object is created to clean up the javaVFrame created in 1826 // doit_prologue(), but after doit() is finished with it. 1827 ResourceMark rm(current_thread); 1828 1829 VM_GetReceiver op(java_thread, current_thread, depth); 1830 VMThread::execute(&op); 1831 jvmtiError err = op.result(); 1832 if (err != JVMTI_ERROR_NONE) { 1833 return err; 1834 } else { 1835 *value_ptr = op.value().l; 1836 return JVMTI_ERROR_NONE; 1837 } 1838 } /* end GetLocalInstance */ 1839 1840 1841 // Threads_lock NOT held, java_thread not protected by lock 1842 // java_thread - pre-checked 1843 // java_thread - unchecked 1844 // depth - pre-checked as non-negative 1845 // value_ptr - pre-checked for NULL 1846 jvmtiError 1847 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) { 1848 // rm object is created to clean up the javaVFrame created in 1849 // doit_prologue(), but after doit() is finished with it. 1850 ResourceMark rm; 1851 1852 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT); 1853 VMThread::execute(&op); 1854 *value_ptr = op.value().i; 1855 return op.result(); 1856 } /* end GetLocalInt */ 1857 1858 1859 // Threads_lock NOT held, java_thread not protected by lock 1860 // java_thread - pre-checked 1861 // java_thread - unchecked 1862 // depth - pre-checked as non-negative 1863 // value_ptr - pre-checked for NULL 1864 jvmtiError 1865 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) { 1866 // rm object is created to clean up the javaVFrame created in 1867 // doit_prologue(), but after doit() is finished with it. 1868 ResourceMark rm; 1869 1870 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG); 1871 VMThread::execute(&op); 1872 *value_ptr = op.value().j; 1873 return op.result(); 1874 } /* end GetLocalLong */ 1875 1876 1877 // Threads_lock NOT held, java_thread not protected by lock 1878 // java_thread - pre-checked 1879 // java_thread - unchecked 1880 // depth - pre-checked as non-negative 1881 // value_ptr - pre-checked for NULL 1882 jvmtiError 1883 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) { 1884 // rm object is created to clean up the javaVFrame created in 1885 // doit_prologue(), but after doit() is finished with it. 1886 ResourceMark rm; 1887 1888 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT); 1889 VMThread::execute(&op); 1890 *value_ptr = op.value().f; 1891 return op.result(); 1892 } /* end GetLocalFloat */ 1893 1894 1895 // Threads_lock NOT held, java_thread not protected by lock 1896 // java_thread - pre-checked 1897 // java_thread - unchecked 1898 // depth - pre-checked as non-negative 1899 // value_ptr - pre-checked for NULL 1900 jvmtiError 1901 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) { 1902 // rm object is created to clean up the javaVFrame created in 1903 // doit_prologue(), but after doit() is finished with it. 1904 ResourceMark rm; 1905 1906 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE); 1907 VMThread::execute(&op); 1908 *value_ptr = op.value().d; 1909 return op.result(); 1910 } /* end GetLocalDouble */ 1911 1912 1913 // Threads_lock NOT held, java_thread not protected by lock 1914 // java_thread - pre-checked 1915 // java_thread - unchecked 1916 // depth - pre-checked as non-negative 1917 jvmtiError 1918 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) { 1919 // rm object is created to clean up the javaVFrame created in 1920 // doit_prologue(), but after doit() is finished with it. 1921 ResourceMark rm; 1922 jvalue val; 1923 val.l = value; 1924 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val); 1925 VMThread::execute(&op); 1926 return op.result(); 1927 } /* end SetLocalObject */ 1928 1929 1930 // Threads_lock NOT held, java_thread not protected by lock 1931 // java_thread - pre-checked 1932 // java_thread - unchecked 1933 // depth - pre-checked as non-negative 1934 jvmtiError 1935 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) { 1936 // rm object is created to clean up the javaVFrame created in 1937 // doit_prologue(), but after doit() is finished with it. 1938 ResourceMark rm; 1939 jvalue val; 1940 val.i = value; 1941 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val); 1942 VMThread::execute(&op); 1943 return op.result(); 1944 } /* end SetLocalInt */ 1945 1946 1947 // Threads_lock NOT held, java_thread not protected by lock 1948 // java_thread - pre-checked 1949 // java_thread - unchecked 1950 // depth - pre-checked as non-negative 1951 jvmtiError 1952 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) { 1953 // rm object is created to clean up the javaVFrame created in 1954 // doit_prologue(), but after doit() is finished with it. 1955 ResourceMark rm; 1956 jvalue val; 1957 val.j = value; 1958 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val); 1959 VMThread::execute(&op); 1960 return op.result(); 1961 } /* end SetLocalLong */ 1962 1963 1964 // Threads_lock NOT held, java_thread not protected by lock 1965 // java_thread - pre-checked 1966 // java_thread - unchecked 1967 // depth - pre-checked as non-negative 1968 jvmtiError 1969 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) { 1970 // rm object is created to clean up the javaVFrame created in 1971 // doit_prologue(), but after doit() is finished with it. 1972 ResourceMark rm; 1973 jvalue val; 1974 val.f = value; 1975 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val); 1976 VMThread::execute(&op); 1977 return op.result(); 1978 } /* end SetLocalFloat */ 1979 1980 1981 // Threads_lock NOT held, java_thread not protected by lock 1982 // java_thread - pre-checked 1983 // java_thread - unchecked 1984 // depth - pre-checked as non-negative 1985 jvmtiError 1986 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) { 1987 // rm object is created to clean up the javaVFrame created in 1988 // doit_prologue(), but after doit() is finished with it. 1989 ResourceMark rm; 1990 jvalue val; 1991 val.d = value; 1992 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val); 1993 VMThread::execute(&op); 1994 return op.result(); 1995 } /* end SetLocalDouble */ 1996 1997 1998 // 1999 // Breakpoint functions 2000 // 2001 2002 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2003 jvmtiError 2004 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) { 2005 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2006 if (location < 0) { // simple invalid location check first 2007 return JVMTI_ERROR_INVALID_LOCATION; 2008 } 2009 // verify that the breakpoint is not past the end of the method 2010 if (location >= (jlocation) method_oop->code_size()) { 2011 return JVMTI_ERROR_INVALID_LOCATION; 2012 } 2013 2014 ResourceMark rm; 2015 JvmtiBreakpoint bp(method_oop, location); 2016 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2017 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE) 2018 return JVMTI_ERROR_DUPLICATE; 2019 2020 if (TraceJVMTICalls) { 2021 jvmti_breakpoints.print(); 2022 } 2023 2024 return JVMTI_ERROR_NONE; 2025 } /* end SetBreakpoint */ 2026 2027 2028 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2029 jvmtiError 2030 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) { 2031 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2032 2033 if (location < 0) { // simple invalid location check first 2034 return JVMTI_ERROR_INVALID_LOCATION; 2035 } 2036 2037 // verify that the breakpoint is not past the end of the method 2038 if (location >= (jlocation) method_oop->code_size()) { 2039 return JVMTI_ERROR_INVALID_LOCATION; 2040 } 2041 2042 JvmtiBreakpoint bp(method_oop, location); 2043 2044 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2045 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND) 2046 return JVMTI_ERROR_NOT_FOUND; 2047 2048 if (TraceJVMTICalls) { 2049 jvmti_breakpoints.print(); 2050 } 2051 2052 return JVMTI_ERROR_NONE; 2053 } /* end ClearBreakpoint */ 2054 2055 2056 // 2057 // Watched Field functions 2058 // 2059 2060 jvmtiError 2061 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2062 // make sure we haven't set this watch before 2063 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE; 2064 fdesc_ptr->set_is_field_access_watched(true); 2065 2066 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true); 2067 2068 return JVMTI_ERROR_NONE; 2069 } /* end SetFieldAccessWatch */ 2070 2071 2072 jvmtiError 2073 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2074 // make sure we have a watch to clear 2075 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND; 2076 fdesc_ptr->set_is_field_access_watched(false); 2077 2078 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false); 2079 2080 return JVMTI_ERROR_NONE; 2081 } /* end ClearFieldAccessWatch */ 2082 2083 2084 jvmtiError 2085 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2086 // make sure we haven't set this watch before 2087 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE; 2088 fdesc_ptr->set_is_field_modification_watched(true); 2089 2090 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true); 2091 2092 return JVMTI_ERROR_NONE; 2093 } /* end SetFieldModificationWatch */ 2094 2095 2096 jvmtiError 2097 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2098 // make sure we have a watch to clear 2099 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND; 2100 fdesc_ptr->set_is_field_modification_watched(false); 2101 2102 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false); 2103 2104 return JVMTI_ERROR_NONE; 2105 } /* end ClearFieldModificationWatch */ 2106 2107 // 2108 // Class functions 2109 // 2110 2111 2112 // k_mirror - may be primitive, this must be checked 2113 // signature_ptr - NULL is a valid value, must be checked 2114 // generic_ptr - NULL is a valid value, must be checked 2115 jvmtiError 2116 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) { 2117 ResourceMark rm; 2118 bool isPrimitive = java_lang_Class::is_primitive(k_mirror); 2119 Klass* k = NULL; 2120 if (!isPrimitive) { 2121 k = java_lang_Class::as_Klass(k_mirror); 2122 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2123 } 2124 if (signature_ptr != NULL) { 2125 char* result = NULL; 2126 if (isPrimitive) { 2127 char tchar = type2char(java_lang_Class::primitive_type(k_mirror)); 2128 result = (char*) jvmtiMalloc(2); 2129 result[0] = tchar; 2130 result[1] = '\0'; 2131 } else { 2132 const char* class_sig = k->signature_name(); 2133 result = (char *) jvmtiMalloc(strlen(class_sig)+1); 2134 strcpy(result, class_sig); 2135 } 2136 *signature_ptr = result; 2137 } 2138 if (generic_ptr != NULL) { 2139 *generic_ptr = NULL; 2140 if (!isPrimitive && k->oop_is_instance()) { 2141 Symbol* soo = InstanceKlass::cast(k)->generic_signature(); 2142 if (soo != NULL) { 2143 const char *gen_sig = soo->as_C_string(); 2144 if (gen_sig != NULL) { 2145 char* gen_result; 2146 jvmtiError err = allocate(strlen(gen_sig) + 1, 2147 (unsigned char **)&gen_result); 2148 if (err != JVMTI_ERROR_NONE) { 2149 return err; 2150 } 2151 strcpy(gen_result, gen_sig); 2152 *generic_ptr = gen_result; 2153 } 2154 } 2155 } 2156 } 2157 return JVMTI_ERROR_NONE; 2158 } /* end GetClassSignature */ 2159 2160 2161 // k_mirror - may be primitive, this must be checked 2162 // status_ptr - pre-checked for NULL 2163 jvmtiError 2164 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) { 2165 jint result = 0; 2166 if (java_lang_Class::is_primitive(k_mirror)) { 2167 result |= JVMTI_CLASS_STATUS_PRIMITIVE; 2168 } else { 2169 Klass* k = java_lang_Class::as_Klass(k_mirror); 2170 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2171 result = k->jvmti_class_status(); 2172 } 2173 *status_ptr = result; 2174 2175 return JVMTI_ERROR_NONE; 2176 } /* end GetClassStatus */ 2177 2178 2179 // k_mirror - may be primitive, this must be checked 2180 // source_name_ptr - pre-checked for NULL 2181 jvmtiError 2182 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) { 2183 if (java_lang_Class::is_primitive(k_mirror)) { 2184 return JVMTI_ERROR_ABSENT_INFORMATION; 2185 } 2186 Klass* k_klass = java_lang_Class::as_Klass(k_mirror); 2187 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS); 2188 2189 if (!k_klass->oop_is_instance()) { 2190 return JVMTI_ERROR_ABSENT_INFORMATION; 2191 } 2192 2193 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name(); 2194 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION); 2195 { 2196 JavaThread* current_thread = JavaThread::current(); 2197 ResourceMark rm(current_thread); 2198 const char* sfncp = (const char*) sfnOop->as_C_string(); 2199 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1); 2200 strcpy(*source_name_ptr, sfncp); 2201 } 2202 2203 return JVMTI_ERROR_NONE; 2204 } /* end GetSourceFileName */ 2205 2206 2207 // k_mirror - may be primitive, this must be checked 2208 // modifiers_ptr - pre-checked for NULL 2209 jvmtiError 2210 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) { 2211 JavaThread* current_thread = JavaThread::current(); 2212 jint result = 0; 2213 if (!java_lang_Class::is_primitive(k_mirror)) { 2214 Klass* k = java_lang_Class::as_Klass(k_mirror); 2215 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2216 result = k->compute_modifier_flags(current_thread); 2217 JavaThread* THREAD = current_thread; // pass to macros 2218 if (HAS_PENDING_EXCEPTION) { 2219 CLEAR_PENDING_EXCEPTION; 2220 return JVMTI_ERROR_INTERNAL; 2221 }; 2222 2223 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()). 2224 if(k->is_super()) { 2225 result |= JVM_ACC_SUPER; 2226 } 2227 } else { 2228 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 2229 } 2230 *modifiers_ptr = result; 2231 2232 return JVMTI_ERROR_NONE; 2233 } /* end GetClassModifiers */ 2234 2235 2236 // k_mirror - may be primitive, this must be checked 2237 // method_count_ptr - pre-checked for NULL 2238 // methods_ptr - pre-checked for NULL 2239 jvmtiError 2240 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) { 2241 JavaThread* current_thread = JavaThread::current(); 2242 HandleMark hm(current_thread); 2243 2244 if (java_lang_Class::is_primitive(k_mirror)) { 2245 *method_count_ptr = 0; 2246 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2247 return JVMTI_ERROR_NONE; 2248 } 2249 Klass* k = java_lang_Class::as_Klass(k_mirror); 2250 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2251 2252 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2253 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2254 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2255 } 2256 2257 if (!k->oop_is_instance()) { 2258 *method_count_ptr = 0; 2259 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2260 return JVMTI_ERROR_NONE; 2261 } 2262 instanceKlassHandle instanceK_h(current_thread, k); 2263 // Allocate the result and fill it in 2264 int result_length = instanceK_h->methods()->length(); 2265 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID)); 2266 int index; 2267 bool jmethodids_found = true; 2268 2269 if (JvmtiExport::can_maintain_original_method_order()) { 2270 // Use the original method ordering indices stored in the class, so we can emit 2271 // jmethodIDs in the order they appeared in the class file 2272 for (index = 0; index < result_length; index++) { 2273 Method* m = instanceK_h->methods()->at(index); 2274 int original_index = instanceK_h->method_ordering()->at(index); 2275 assert(original_index >= 0 && original_index < result_length, "invalid original method index"); 2276 jmethodID id; 2277 if (jmethodids_found) { 2278 id = m->find_jmethod_id_or_null(); 2279 if (id == NULL) { 2280 // If we find an uninitialized value, make sure there is 2281 // enough space for all the uninitialized values we might 2282 // find. 2283 instanceK_h->ensure_space_for_methodids(index); 2284 jmethodids_found = false; 2285 id = m->jmethod_id(); 2286 } 2287 } else { 2288 id = m->jmethod_id(); 2289 } 2290 result_list[original_index] = id; 2291 } 2292 } else { 2293 // otherwise just copy in any order 2294 for (index = 0; index < result_length; index++) { 2295 Method* m = instanceK_h->methods()->at(index); 2296 jmethodID id; 2297 if (jmethodids_found) { 2298 id = m->find_jmethod_id_or_null(); 2299 if (id == NULL) { 2300 // If we find an uninitialized value, make sure there is 2301 // enough space for all the uninitialized values we might 2302 // find. 2303 instanceK_h->ensure_space_for_methodids(index); 2304 jmethodids_found = false; 2305 id = m->jmethod_id(); 2306 } 2307 } else { 2308 id = m->jmethod_id(); 2309 } 2310 result_list[index] = id; 2311 } 2312 } 2313 // Fill in return value. 2314 *method_count_ptr = result_length; 2315 *methods_ptr = result_list; 2316 2317 return JVMTI_ERROR_NONE; 2318 } /* end GetClassMethods */ 2319 2320 2321 // k_mirror - may be primitive, this must be checked 2322 // field_count_ptr - pre-checked for NULL 2323 // fields_ptr - pre-checked for NULL 2324 jvmtiError 2325 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) { 2326 if (java_lang_Class::is_primitive(k_mirror)) { 2327 *field_count_ptr = 0; 2328 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2329 return JVMTI_ERROR_NONE; 2330 } 2331 JavaThread* current_thread = JavaThread::current(); 2332 HandleMark hm(current_thread); 2333 Klass* k = java_lang_Class::as_Klass(k_mirror); 2334 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2335 2336 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2337 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2338 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2339 } 2340 2341 if (!k->oop_is_instance()) { 2342 *field_count_ptr = 0; 2343 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2344 return JVMTI_ERROR_NONE; 2345 } 2346 2347 2348 instanceKlassHandle instanceK_h(current_thread, k); 2349 2350 int result_count = 0; 2351 // First, count the fields. 2352 FilteredFieldStream flds(instanceK_h, true, true); 2353 result_count = flds.field_count(); 2354 2355 // Allocate the result and fill it in 2356 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID)); 2357 // The JVMTI spec requires fields in the order they occur in the class file, 2358 // this is the reverse order of what FieldStream hands out. 2359 int id_index = (result_count - 1); 2360 2361 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) { 2362 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID( 2363 instanceK_h, src_st.offset(), 2364 src_st.access_flags().is_static()); 2365 } 2366 assert(id_index == -1, "just checking"); 2367 // Fill in the results 2368 *field_count_ptr = result_count; 2369 *fields_ptr = result_list; 2370 2371 return JVMTI_ERROR_NONE; 2372 } /* end GetClassFields */ 2373 2374 2375 // k_mirror - may be primitive, this must be checked 2376 // interface_count_ptr - pre-checked for NULL 2377 // interfaces_ptr - pre-checked for NULL 2378 jvmtiError 2379 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) { 2380 { 2381 if (java_lang_Class::is_primitive(k_mirror)) { 2382 *interface_count_ptr = 0; 2383 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2384 return JVMTI_ERROR_NONE; 2385 } 2386 JavaThread* current_thread = JavaThread::current(); 2387 HandleMark hm(current_thread); 2388 Klass* k = java_lang_Class::as_Klass(k_mirror); 2389 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2390 2391 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2392 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) 2393 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2394 2395 if (!k->oop_is_instance()) { 2396 *interface_count_ptr = 0; 2397 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2398 return JVMTI_ERROR_NONE; 2399 } 2400 2401 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces(); 2402 const int result_length = (interface_list == NULL ? 0 : interface_list->length()); 2403 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass)); 2404 for (int i_index = 0; i_index < result_length; i_index += 1) { 2405 Klass* klass_at = interface_list->at(i_index); 2406 assert(klass_at->is_klass(), "interfaces must be Klass*s"); 2407 assert(klass_at->is_interface(), "interfaces must be interfaces"); 2408 oop mirror_at = klass_at->java_mirror(); 2409 Handle handle_at = Handle(current_thread, mirror_at); 2410 result_list[i_index] = (jclass) jni_reference(handle_at); 2411 } 2412 *interface_count_ptr = result_length; 2413 *interfaces_ptr = result_list; 2414 } 2415 2416 return JVMTI_ERROR_NONE; 2417 } /* end GetImplementedInterfaces */ 2418 2419 2420 // k_mirror - may be primitive, this must be checked 2421 // minor_version_ptr - pre-checked for NULL 2422 // major_version_ptr - pre-checked for NULL 2423 jvmtiError 2424 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) { 2425 if (java_lang_Class::is_primitive(k_mirror)) { 2426 return JVMTI_ERROR_ABSENT_INFORMATION; 2427 } 2428 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 2429 Thread *thread = Thread::current(); 2430 HandleMark hm(thread); 2431 KlassHandle klass(thread, k_oop); 2432 2433 jint status = klass->jvmti_class_status(); 2434 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2435 return JVMTI_ERROR_INVALID_CLASS; 2436 } 2437 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2438 return JVMTI_ERROR_ABSENT_INFORMATION; 2439 } 2440 2441 instanceKlassHandle ik(thread, k_oop); 2442 *minor_version_ptr = ik->minor_version(); 2443 *major_version_ptr = ik->major_version(); 2444 2445 return JVMTI_ERROR_NONE; 2446 } /* end GetClassVersionNumbers */ 2447 2448 2449 // k_mirror - may be primitive, this must be checked 2450 // constant_pool_count_ptr - pre-checked for NULL 2451 // constant_pool_byte_count_ptr - pre-checked for NULL 2452 // constant_pool_bytes_ptr - pre-checked for NULL 2453 jvmtiError 2454 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) { 2455 if (java_lang_Class::is_primitive(k_mirror)) { 2456 return JVMTI_ERROR_ABSENT_INFORMATION; 2457 } 2458 2459 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 2460 Thread *thread = Thread::current(); 2461 HandleMark hm(thread); 2462 ResourceMark rm(thread); 2463 KlassHandle klass(thread, k_oop); 2464 2465 jint status = klass->jvmti_class_status(); 2466 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2467 return JVMTI_ERROR_INVALID_CLASS; 2468 } 2469 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2470 return JVMTI_ERROR_ABSENT_INFORMATION; 2471 } 2472 2473 instanceKlassHandle ikh(thread, k_oop); 2474 JvmtiConstantPoolReconstituter reconstituter(ikh); 2475 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2476 return reconstituter.get_error(); 2477 } 2478 2479 unsigned char *cpool_bytes; 2480 int cpool_size = reconstituter.cpool_size(); 2481 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2482 return reconstituter.get_error(); 2483 } 2484 jvmtiError res = allocate(cpool_size, &cpool_bytes); 2485 if (res != JVMTI_ERROR_NONE) { 2486 return res; 2487 } 2488 reconstituter.copy_cpool_bytes(cpool_bytes); 2489 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2490 return reconstituter.get_error(); 2491 } 2492 2493 constantPoolHandle constants(thread, ikh->constants()); 2494 *constant_pool_count_ptr = constants->length(); 2495 *constant_pool_byte_count_ptr = cpool_size; 2496 *constant_pool_bytes_ptr = cpool_bytes; 2497 2498 return JVMTI_ERROR_NONE; 2499 } /* end GetConstantPool */ 2500 2501 2502 // k_mirror - may be primitive, this must be checked 2503 // is_interface_ptr - pre-checked for NULL 2504 jvmtiError 2505 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) { 2506 { 2507 bool result = false; 2508 if (!java_lang_Class::is_primitive(k_mirror)) { 2509 Klass* k = java_lang_Class::as_Klass(k_mirror); 2510 if (k != NULL && k->is_interface()) { 2511 result = true; 2512 } 2513 } 2514 *is_interface_ptr = result; 2515 } 2516 2517 return JVMTI_ERROR_NONE; 2518 } /* end IsInterface */ 2519 2520 2521 // k_mirror - may be primitive, this must be checked 2522 // is_array_class_ptr - pre-checked for NULL 2523 jvmtiError 2524 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) { 2525 { 2526 bool result = false; 2527 if (!java_lang_Class::is_primitive(k_mirror)) { 2528 Klass* k = java_lang_Class::as_Klass(k_mirror); 2529 if (k != NULL && k->oop_is_array()) { 2530 result = true; 2531 } 2532 } 2533 *is_array_class_ptr = result; 2534 } 2535 2536 return JVMTI_ERROR_NONE; 2537 } /* end IsArrayClass */ 2538 2539 2540 // k_mirror - may be primitive, this must be checked 2541 // classloader_ptr - pre-checked for NULL 2542 jvmtiError 2543 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) { 2544 { 2545 if (java_lang_Class::is_primitive(k_mirror)) { 2546 *classloader_ptr = (jclass) jni_reference(Handle()); 2547 return JVMTI_ERROR_NONE; 2548 } 2549 JavaThread* current_thread = JavaThread::current(); 2550 HandleMark hm(current_thread); 2551 Klass* k = java_lang_Class::as_Klass(k_mirror); 2552 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2553 2554 oop result_oop = k->class_loader(); 2555 if (result_oop == NULL) { 2556 *classloader_ptr = (jclass) jni_reference(Handle()); 2557 return JVMTI_ERROR_NONE; 2558 } 2559 Handle result_handle = Handle(current_thread, result_oop); 2560 jclass result_jnihandle = (jclass) jni_reference(result_handle); 2561 *classloader_ptr = result_jnihandle; 2562 } 2563 return JVMTI_ERROR_NONE; 2564 } /* end GetClassLoader */ 2565 2566 2567 // k_mirror - may be primitive, this must be checked 2568 // source_debug_extension_ptr - pre-checked for NULL 2569 jvmtiError 2570 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) { 2571 { 2572 if (java_lang_Class::is_primitive(k_mirror)) { 2573 return JVMTI_ERROR_ABSENT_INFORMATION; 2574 } 2575 Klass* k = java_lang_Class::as_Klass(k_mirror); 2576 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2577 if (!k->oop_is_instance()) { 2578 return JVMTI_ERROR_ABSENT_INFORMATION; 2579 } 2580 char* sde = InstanceKlass::cast(k)->source_debug_extension(); 2581 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION); 2582 2583 { 2584 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1); 2585 strcpy(*source_debug_extension_ptr, sde); 2586 } 2587 } 2588 2589 return JVMTI_ERROR_NONE; 2590 } /* end GetSourceDebugExtension */ 2591 2592 // 2593 // Object functions 2594 // 2595 2596 // hash_code_ptr - pre-checked for NULL 2597 jvmtiError 2598 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) { 2599 oop mirror = JNIHandles::resolve_external_guard(object); 2600 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 2601 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER); 2602 2603 { 2604 jint result = (jint) mirror->identity_hash(); 2605 *hash_code_ptr = result; 2606 } 2607 return JVMTI_ERROR_NONE; 2608 } /* end GetObjectHashCode */ 2609 2610 2611 // info_ptr - pre-checked for NULL 2612 jvmtiError 2613 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) { 2614 JavaThread* calling_thread = JavaThread::current(); 2615 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr); 2616 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) { 2617 // Some of the critical threads were not suspended. go to a safepoint and try again 2618 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr); 2619 VMThread::execute(&op); 2620 err = op.result(); 2621 } 2622 return err; 2623 } /* end GetObjectMonitorUsage */ 2624 2625 2626 // 2627 // Field functions 2628 // 2629 2630 // name_ptr - NULL is a valid value, must be checked 2631 // signature_ptr - NULL is a valid value, must be checked 2632 // generic_ptr - NULL is a valid value, must be checked 2633 jvmtiError 2634 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2635 JavaThread* current_thread = JavaThread::current(); 2636 ResourceMark rm(current_thread); 2637 if (name_ptr == NULL) { 2638 // just don't return the name 2639 } else { 2640 const char* fieldName = fdesc_ptr->name()->as_C_string(); 2641 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1); 2642 if (*name_ptr == NULL) 2643 return JVMTI_ERROR_OUT_OF_MEMORY; 2644 strcpy(*name_ptr, fieldName); 2645 } 2646 if (signature_ptr== NULL) { 2647 // just don't return the signature 2648 } else { 2649 const char* fieldSignature = fdesc_ptr->signature()->as_C_string(); 2650 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1); 2651 if (*signature_ptr == NULL) 2652 return JVMTI_ERROR_OUT_OF_MEMORY; 2653 strcpy(*signature_ptr, fieldSignature); 2654 } 2655 if (generic_ptr != NULL) { 2656 *generic_ptr = NULL; 2657 Symbol* soop = fdesc_ptr->generic_signature(); 2658 if (soop != NULL) { 2659 const char* gen_sig = soop->as_C_string(); 2660 if (gen_sig != NULL) { 2661 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2662 if (err != JVMTI_ERROR_NONE) { 2663 return err; 2664 } 2665 strcpy(*generic_ptr, gen_sig); 2666 } 2667 } 2668 } 2669 return JVMTI_ERROR_NONE; 2670 } /* end GetFieldName */ 2671 2672 2673 // declaring_class_ptr - pre-checked for NULL 2674 jvmtiError 2675 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) { 2676 2677 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder()); 2678 return JVMTI_ERROR_NONE; 2679 } /* end GetFieldDeclaringClass */ 2680 2681 2682 // modifiers_ptr - pre-checked for NULL 2683 jvmtiError 2684 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) { 2685 2686 AccessFlags resultFlags = fdesc_ptr->access_flags(); 2687 jint result = resultFlags.as_int(); 2688 *modifiers_ptr = result; 2689 2690 return JVMTI_ERROR_NONE; 2691 } /* end GetFieldModifiers */ 2692 2693 2694 // is_synthetic_ptr - pre-checked for NULL 2695 jvmtiError 2696 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) { 2697 *is_synthetic_ptr = fdesc_ptr->is_synthetic(); 2698 return JVMTI_ERROR_NONE; 2699 } /* end IsFieldSynthetic */ 2700 2701 2702 // 2703 // Method functions 2704 // 2705 2706 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2707 // name_ptr - NULL is a valid value, must be checked 2708 // signature_ptr - NULL is a valid value, must be checked 2709 // generic_ptr - NULL is a valid value, must be checked 2710 jvmtiError 2711 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2712 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2713 JavaThread* current_thread = JavaThread::current(); 2714 2715 ResourceMark rm(current_thread); // get the utf8 name and signature 2716 if (name_ptr == NULL) { 2717 // just don't return the name 2718 } else { 2719 const char* utf8_name = (const char *) method_oop->name()->as_utf8(); 2720 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1); 2721 strcpy(*name_ptr, utf8_name); 2722 } 2723 if (signature_ptr == NULL) { 2724 // just don't return the signature 2725 } else { 2726 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8(); 2727 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1); 2728 strcpy(*signature_ptr, utf8_signature); 2729 } 2730 2731 if (generic_ptr != NULL) { 2732 *generic_ptr = NULL; 2733 Symbol* soop = method_oop->generic_signature(); 2734 if (soop != NULL) { 2735 const char* gen_sig = soop->as_C_string(); 2736 if (gen_sig != NULL) { 2737 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2738 if (err != JVMTI_ERROR_NONE) { 2739 return err; 2740 } 2741 strcpy(*generic_ptr, gen_sig); 2742 } 2743 } 2744 } 2745 return JVMTI_ERROR_NONE; 2746 } /* end GetMethodName */ 2747 2748 2749 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2750 // declaring_class_ptr - pre-checked for NULL 2751 jvmtiError 2752 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) { 2753 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2754 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder()); 2755 return JVMTI_ERROR_NONE; 2756 } /* end GetMethodDeclaringClass */ 2757 2758 2759 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2760 // modifiers_ptr - pre-checked for NULL 2761 jvmtiError 2762 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) { 2763 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2764 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2765 return JVMTI_ERROR_NONE; 2766 } /* end GetMethodModifiers */ 2767 2768 2769 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2770 // max_ptr - pre-checked for NULL 2771 jvmtiError 2772 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) { 2773 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2774 // get max stack 2775 (*max_ptr) = method_oop->max_locals(); 2776 return JVMTI_ERROR_NONE; 2777 } /* end GetMaxLocals */ 2778 2779 2780 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2781 // size_ptr - pre-checked for NULL 2782 jvmtiError 2783 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) { 2784 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2785 // get size of arguments 2786 2787 (*size_ptr) = method_oop->size_of_parameters(); 2788 return JVMTI_ERROR_NONE; 2789 } /* end GetArgumentsSize */ 2790 2791 2792 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2793 // entry_count_ptr - pre-checked for NULL 2794 // table_ptr - pre-checked for NULL 2795 jvmtiError 2796 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) { 2797 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2798 if (!method_oop->has_linenumber_table()) { 2799 return (JVMTI_ERROR_ABSENT_INFORMATION); 2800 } 2801 2802 // The line number table is compressed so we don't know how big it is until decompressed. 2803 // Decompression is really fast so we just do it twice. 2804 2805 // Compute size of table 2806 jint num_entries = 0; 2807 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 2808 while (stream.read_pair()) { 2809 num_entries++; 2810 } 2811 jvmtiLineNumberEntry *jvmti_table = 2812 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry))); 2813 2814 // Fill jvmti table 2815 if (num_entries > 0) { 2816 int index = 0; 2817 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 2818 while (stream.read_pair()) { 2819 jvmti_table[index].start_location = (jlocation) stream.bci(); 2820 jvmti_table[index].line_number = (jint) stream.line(); 2821 index++; 2822 } 2823 assert(index == num_entries, "sanity check"); 2824 } 2825 2826 // Set up results 2827 (*entry_count_ptr) = num_entries; 2828 (*table_ptr) = jvmti_table; 2829 2830 return JVMTI_ERROR_NONE; 2831 } /* end GetLineNumberTable */ 2832 2833 2834 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2835 // start_location_ptr - pre-checked for NULL 2836 // end_location_ptr - pre-checked for NULL 2837 jvmtiError 2838 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) { 2839 2840 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2841 // get start and end location 2842 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1); 2843 if (method_oop->code_size() == 0) { 2844 // there is no code so there is no start location 2845 (*start_location_ptr) = (jlocation)(-1); 2846 } else { 2847 (*start_location_ptr) = (jlocation)(0); 2848 } 2849 2850 return JVMTI_ERROR_NONE; 2851 } /* end GetMethodLocation */ 2852 2853 2854 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2855 // entry_count_ptr - pre-checked for NULL 2856 // table_ptr - pre-checked for NULL 2857 jvmtiError 2858 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) { 2859 2860 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2861 JavaThread* current_thread = JavaThread::current(); 2862 2863 // does the klass have any local variable information? 2864 InstanceKlass* ik = method_oop->method_holder(); 2865 if (!ik->access_flags().has_localvariable_table()) { 2866 return (JVMTI_ERROR_ABSENT_INFORMATION); 2867 } 2868 2869 ConstantPool* constants = method_oop->constants(); 2870 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION); 2871 2872 // in the vm localvariable table representation, 6 consecutive elements in the table 2873 // represent a 6-tuple of shorts 2874 // [start_pc, length, name_index, descriptor_index, signature_index, index] 2875 jint num_entries = method_oop->localvariable_table_length(); 2876 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *) 2877 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry))); 2878 2879 if (num_entries > 0) { 2880 LocalVariableTableElement* table = method_oop->localvariable_table_start(); 2881 for (int i = 0; i < num_entries; i++) { 2882 // get the 5 tuple information from the vm table 2883 jlocation start_location = (jlocation) table[i].start_bci; 2884 jint length = (jint) table[i].length; 2885 int name_index = (int) table[i].name_cp_index; 2886 int signature_index = (int) table[i].descriptor_cp_index; 2887 int generic_signature_index = (int) table[i].signature_cp_index; 2888 jint slot = (jint) table[i].slot; 2889 2890 // get utf8 name and signature 2891 char *name_buf = NULL; 2892 char *sig_buf = NULL; 2893 char *gen_sig_buf = NULL; 2894 { 2895 ResourceMark rm(current_thread); 2896 2897 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8(); 2898 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1); 2899 strcpy(name_buf, utf8_name); 2900 2901 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8(); 2902 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1); 2903 strcpy(sig_buf, utf8_signature); 2904 2905 if (generic_signature_index > 0) { 2906 const char *utf8_gen_sign = (const char *) 2907 constants->symbol_at(generic_signature_index)->as_utf8(); 2908 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1); 2909 strcpy(gen_sig_buf, utf8_gen_sign); 2910 } 2911 } 2912 2913 // fill in the jvmti local variable table 2914 jvmti_table[i].start_location = start_location; 2915 jvmti_table[i].length = length; 2916 jvmti_table[i].name = name_buf; 2917 jvmti_table[i].signature = sig_buf; 2918 jvmti_table[i].generic_signature = gen_sig_buf; 2919 jvmti_table[i].slot = slot; 2920 } 2921 } 2922 2923 // set results 2924 (*entry_count_ptr) = num_entries; 2925 (*table_ptr) = jvmti_table; 2926 2927 return JVMTI_ERROR_NONE; 2928 } /* end GetLocalVariableTable */ 2929 2930 2931 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2932 // bytecode_count_ptr - pre-checked for NULL 2933 // bytecodes_ptr - pre-checked for NULL 2934 jvmtiError 2935 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) { 2936 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2937 2938 HandleMark hm; 2939 methodHandle method(method_oop); 2940 jint size = (jint)method->code_size(); 2941 jvmtiError err = allocate(size, bytecodes_ptr); 2942 if (err != JVMTI_ERROR_NONE) { 2943 return err; 2944 } 2945 2946 (*bytecode_count_ptr) = size; 2947 // get byte codes 2948 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr); 2949 2950 return JVMTI_ERROR_NONE; 2951 } /* end GetBytecodes */ 2952 2953 2954 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2955 // is_native_ptr - pre-checked for NULL 2956 jvmtiError 2957 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) { 2958 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2959 (*is_native_ptr) = method_oop->is_native(); 2960 return JVMTI_ERROR_NONE; 2961 } /* end IsMethodNative */ 2962 2963 2964 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2965 // is_synthetic_ptr - pre-checked for NULL 2966 jvmtiError 2967 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) { 2968 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2969 (*is_synthetic_ptr) = method_oop->is_synthetic(); 2970 return JVMTI_ERROR_NONE; 2971 } /* end IsMethodSynthetic */ 2972 2973 2974 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2975 // is_obsolete_ptr - pre-checked for NULL 2976 jvmtiError 2977 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) { 2978 if (use_version_1_0_semantics() && 2979 get_capabilities()->can_redefine_classes == 0) { 2980 // This JvmtiEnv requested version 1.0 semantics and this function 2981 // requires the can_redefine_classes capability in version 1.0 so 2982 // we need to return an error here. 2983 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 2984 } 2985 2986 if (method_oop == NULL || method_oop->is_obsolete()) { 2987 *is_obsolete_ptr = true; 2988 } else { 2989 *is_obsolete_ptr = false; 2990 } 2991 return JVMTI_ERROR_NONE; 2992 } /* end IsMethodObsolete */ 2993 2994 // 2995 // Raw Monitor functions 2996 // 2997 2998 // name - pre-checked for NULL 2999 // monitor_ptr - pre-checked for NULL 3000 jvmtiError 3001 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) { 3002 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name); 3003 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY); 3004 3005 *monitor_ptr = (jrawMonitorID)rmonitor; 3006 3007 return JVMTI_ERROR_NONE; 3008 } /* end CreateRawMonitor */ 3009 3010 3011 // rmonitor - pre-checked for validity 3012 jvmtiError 3013 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) { 3014 if (Threads::number_of_threads() == 0) { 3015 // Remove this monitor from pending raw monitors list 3016 // if it has entered in onload or start phase. 3017 JvmtiPendingMonitors::destroy(rmonitor); 3018 } else { 3019 Thread* thread = Thread::current(); 3020 if (rmonitor->is_entered(thread)) { 3021 // The caller owns this monitor which we are about to destroy. 3022 // We exit the underlying synchronization object so that the 3023 // "delete monitor" call below can work without an assertion 3024 // failure on systems that don't like destroying synchronization 3025 // objects that are locked. 3026 int r; 3027 intptr_t recursion = rmonitor->recursions(); 3028 for (intptr_t i=0; i <= recursion; i++) { 3029 r = rmonitor->raw_exit(thread); 3030 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 3031 if (r != ObjectMonitor::OM_OK) { // robustness 3032 return JVMTI_ERROR_INTERNAL; 3033 } 3034 } 3035 } 3036 if (rmonitor->owner() != NULL) { 3037 // The caller is trying to destroy a monitor that is locked by 3038 // someone else. While this is not forbidden by the JVMTI 3039 // spec, it will cause an assertion failure on systems that don't 3040 // like destroying synchronization objects that are locked. 3041 // We indicate a problem with the error return (and leak the 3042 // monitor's memory). 3043 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3044 } 3045 } 3046 3047 delete rmonitor; 3048 3049 return JVMTI_ERROR_NONE; 3050 } /* end DestroyRawMonitor */ 3051 3052 3053 // rmonitor - pre-checked for validity 3054 jvmtiError 3055 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) { 3056 if (Threads::number_of_threads() == 0) { 3057 // No JavaThreads exist so ObjectMonitor enter cannot be 3058 // used, add this raw monitor to the pending list. 3059 // The pending monitors will be actually entered when 3060 // the VM is setup. 3061 // See transition_pending_raw_monitors in create_vm() 3062 // in thread.cpp. 3063 JvmtiPendingMonitors::enter(rmonitor); 3064 } else { 3065 int r; 3066 Thread* thread = Thread::current(); 3067 3068 if (thread->is_Java_thread()) { 3069 JavaThread* current_thread = (JavaThread*)thread; 3070 3071 #ifdef PROPER_TRANSITIONS 3072 // Not really unknown but ThreadInVMfromNative does more than we want 3073 ThreadInVMfromUnknown __tiv; 3074 { 3075 ThreadBlockInVM __tbivm(current_thread); 3076 r = rmonitor->raw_enter(current_thread); 3077 } 3078 #else 3079 /* Transition to thread_blocked without entering vm state */ 3080 /* This is really evil. Normally you can't undo _thread_blocked */ 3081 /* transitions like this because it would cause us to miss a */ 3082 /* safepoint but since the thread was already in _thread_in_native */ 3083 /* the thread is not leaving a safepoint safe state and it will */ 3084 /* block when it tries to return from native. We can't safepoint */ 3085 /* block in here because we could deadlock the vmthread. Blech. */ 3086 3087 JavaThreadState state = current_thread->thread_state(); 3088 assert(state == _thread_in_native, "Must be _thread_in_native"); 3089 // frame should already be walkable since we are in native 3090 assert(!current_thread->has_last_Java_frame() || 3091 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3092 current_thread->set_thread_state(_thread_blocked); 3093 3094 r = rmonitor->raw_enter(current_thread); 3095 // restore state, still at a safepoint safe state 3096 current_thread->set_thread_state(state); 3097 3098 #endif /* PROPER_TRANSITIONS */ 3099 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked"); 3100 } else { 3101 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3102 r = rmonitor->raw_enter(thread); 3103 } else { 3104 ShouldNotReachHere(); 3105 } 3106 } 3107 3108 if (r != ObjectMonitor::OM_OK) { // robustness 3109 return JVMTI_ERROR_INTERNAL; 3110 } 3111 } 3112 return JVMTI_ERROR_NONE; 3113 } /* end RawMonitorEnter */ 3114 3115 3116 // rmonitor - pre-checked for validity 3117 jvmtiError 3118 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) { 3119 jvmtiError err = JVMTI_ERROR_NONE; 3120 3121 if (Threads::number_of_threads() == 0) { 3122 // No JavaThreads exist so just remove this monitor from the pending list. 3123 // Bool value from exit is false if rmonitor is not in the list. 3124 if (!JvmtiPendingMonitors::exit(rmonitor)) { 3125 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3126 } 3127 } else { 3128 int r; 3129 Thread* thread = Thread::current(); 3130 3131 if (thread->is_Java_thread()) { 3132 JavaThread* current_thread = (JavaThread*)thread; 3133 #ifdef PROPER_TRANSITIONS 3134 // Not really unknown but ThreadInVMfromNative does more than we want 3135 ThreadInVMfromUnknown __tiv; 3136 #endif /* PROPER_TRANSITIONS */ 3137 r = rmonitor->raw_exit(current_thread); 3138 } else { 3139 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3140 r = rmonitor->raw_exit(thread); 3141 } else { 3142 ShouldNotReachHere(); 3143 } 3144 } 3145 3146 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3147 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3148 } else { 3149 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 3150 if (r != ObjectMonitor::OM_OK) { // robustness 3151 err = JVMTI_ERROR_INTERNAL; 3152 } 3153 } 3154 } 3155 return err; 3156 } /* end RawMonitorExit */ 3157 3158 3159 // rmonitor - pre-checked for validity 3160 jvmtiError 3161 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) { 3162 int r; 3163 Thread* thread = Thread::current(); 3164 3165 if (thread->is_Java_thread()) { 3166 JavaThread* current_thread = (JavaThread*)thread; 3167 #ifdef PROPER_TRANSITIONS 3168 // Not really unknown but ThreadInVMfromNative does more than we want 3169 ThreadInVMfromUnknown __tiv; 3170 { 3171 ThreadBlockInVM __tbivm(current_thread); 3172 r = rmonitor->raw_wait(millis, true, current_thread); 3173 } 3174 #else 3175 /* Transition to thread_blocked without entering vm state */ 3176 /* This is really evil. Normally you can't undo _thread_blocked */ 3177 /* transitions like this because it would cause us to miss a */ 3178 /* safepoint but since the thread was already in _thread_in_native */ 3179 /* the thread is not leaving a safepoint safe state and it will */ 3180 /* block when it tries to return from native. We can't safepoint */ 3181 /* block in here because we could deadlock the vmthread. Blech. */ 3182 3183 JavaThreadState state = current_thread->thread_state(); 3184 assert(state == _thread_in_native, "Must be _thread_in_native"); 3185 // frame should already be walkable since we are in native 3186 assert(!current_thread->has_last_Java_frame() || 3187 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3188 current_thread->set_thread_state(_thread_blocked); 3189 3190 r = rmonitor->raw_wait(millis, true, current_thread); 3191 // restore state, still at a safepoint safe state 3192 current_thread->set_thread_state(state); 3193 3194 #endif /* PROPER_TRANSITIONS */ 3195 } else { 3196 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3197 r = rmonitor->raw_wait(millis, true, thread); 3198 } else { 3199 ShouldNotReachHere(); 3200 } 3201 } 3202 3203 switch (r) { 3204 case ObjectMonitor::OM_INTERRUPTED: 3205 return JVMTI_ERROR_INTERRUPT; 3206 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE: 3207 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3208 } 3209 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked"); 3210 if (r != ObjectMonitor::OM_OK) { // robustness 3211 return JVMTI_ERROR_INTERNAL; 3212 } 3213 3214 return JVMTI_ERROR_NONE; 3215 } /* end RawMonitorWait */ 3216 3217 3218 // rmonitor - pre-checked for validity 3219 jvmtiError 3220 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) { 3221 int r; 3222 Thread* thread = Thread::current(); 3223 3224 if (thread->is_Java_thread()) { 3225 JavaThread* current_thread = (JavaThread*)thread; 3226 // Not really unknown but ThreadInVMfromNative does more than we want 3227 ThreadInVMfromUnknown __tiv; 3228 r = rmonitor->raw_notify(current_thread); 3229 } else { 3230 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3231 r = rmonitor->raw_notify(thread); 3232 } else { 3233 ShouldNotReachHere(); 3234 } 3235 } 3236 3237 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3238 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3239 } 3240 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked"); 3241 if (r != ObjectMonitor::OM_OK) { // robustness 3242 return JVMTI_ERROR_INTERNAL; 3243 } 3244 3245 return JVMTI_ERROR_NONE; 3246 } /* end RawMonitorNotify */ 3247 3248 3249 // rmonitor - pre-checked for validity 3250 jvmtiError 3251 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) { 3252 int r; 3253 Thread* thread = Thread::current(); 3254 3255 if (thread->is_Java_thread()) { 3256 JavaThread* current_thread = (JavaThread*)thread; 3257 ThreadInVMfromUnknown __tiv; 3258 r = rmonitor->raw_notifyAll(current_thread); 3259 } else { 3260 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3261 r = rmonitor->raw_notifyAll(thread); 3262 } else { 3263 ShouldNotReachHere(); 3264 } 3265 } 3266 3267 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3268 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3269 } 3270 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked"); 3271 if (r != ObjectMonitor::OM_OK) { // robustness 3272 return JVMTI_ERROR_INTERNAL; 3273 } 3274 3275 return JVMTI_ERROR_NONE; 3276 } /* end RawMonitorNotifyAll */ 3277 3278 3279 // 3280 // JNI Function Interception functions 3281 // 3282 3283 3284 // function_table - pre-checked for NULL 3285 jvmtiError 3286 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) { 3287 // Copy jni function table at safepoint. 3288 VM_JNIFunctionTableCopier copier(function_table); 3289 VMThread::execute(&copier); 3290 3291 return JVMTI_ERROR_NONE; 3292 } /* end SetJNIFunctionTable */ 3293 3294 3295 // function_table - pre-checked for NULL 3296 jvmtiError 3297 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) { 3298 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface)); 3299 if (*function_table == NULL) 3300 return JVMTI_ERROR_OUT_OF_MEMORY; 3301 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface)); 3302 return JVMTI_ERROR_NONE; 3303 } /* end GetJNIFunctionTable */ 3304 3305 3306 // 3307 // Event Management functions 3308 // 3309 3310 jvmtiError 3311 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) { 3312 // can only generate two event types 3313 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD && 3314 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) { 3315 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3316 } 3317 3318 // for compiled_method_load events we must check that the environment 3319 // has the can_generate_compiled_method_load_events capability. 3320 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) { 3321 if (get_capabilities()->can_generate_compiled_method_load_events == 0) { 3322 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3323 } 3324 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this); 3325 } else { 3326 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this); 3327 } 3328 3329 } /* end GenerateEvents */ 3330 3331 3332 // 3333 // Extension Mechanism functions 3334 // 3335 3336 // extension_count_ptr - pre-checked for NULL 3337 // extensions - pre-checked for NULL 3338 jvmtiError 3339 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) { 3340 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions); 3341 } /* end GetExtensionFunctions */ 3342 3343 3344 // extension_count_ptr - pre-checked for NULL 3345 // extensions - pre-checked for NULL 3346 jvmtiError 3347 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) { 3348 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions); 3349 } /* end GetExtensionEvents */ 3350 3351 3352 // callback - NULL is a valid value, must be checked 3353 jvmtiError 3354 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) { 3355 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback); 3356 } /* end SetExtensionEventCallback */ 3357 3358 // 3359 // Timers functions 3360 // 3361 3362 // info_ptr - pre-checked for NULL 3363 jvmtiError 3364 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3365 os::current_thread_cpu_time_info(info_ptr); 3366 return JVMTI_ERROR_NONE; 3367 } /* end GetCurrentThreadCpuTimerInfo */ 3368 3369 3370 // nanos_ptr - pre-checked for NULL 3371 jvmtiError 3372 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) { 3373 *nanos_ptr = os::current_thread_cpu_time(); 3374 return JVMTI_ERROR_NONE; 3375 } /* end GetCurrentThreadCpuTime */ 3376 3377 3378 // info_ptr - pre-checked for NULL 3379 jvmtiError 3380 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3381 os::thread_cpu_time_info(info_ptr); 3382 return JVMTI_ERROR_NONE; 3383 } /* end GetThreadCpuTimerInfo */ 3384 3385 3386 // Threads_lock NOT held, java_thread not protected by lock 3387 // java_thread - pre-checked 3388 // nanos_ptr - pre-checked for NULL 3389 jvmtiError 3390 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) { 3391 *nanos_ptr = os::thread_cpu_time(java_thread); 3392 return JVMTI_ERROR_NONE; 3393 } /* end GetThreadCpuTime */ 3394 3395 3396 // info_ptr - pre-checked for NULL 3397 jvmtiError 3398 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) { 3399 os::javaTimeNanos_info(info_ptr); 3400 return JVMTI_ERROR_NONE; 3401 } /* end GetTimerInfo */ 3402 3403 3404 // nanos_ptr - pre-checked for NULL 3405 jvmtiError 3406 JvmtiEnv::GetTime(jlong* nanos_ptr) { 3407 *nanos_ptr = os::javaTimeNanos(); 3408 return JVMTI_ERROR_NONE; 3409 } /* end GetTime */ 3410 3411 3412 // processor_count_ptr - pre-checked for NULL 3413 jvmtiError 3414 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) { 3415 *processor_count_ptr = os::active_processor_count(); 3416 return JVMTI_ERROR_NONE; 3417 } /* end GetAvailableProcessors */ 3418 3419 // 3420 // System Properties functions 3421 // 3422 3423 // count_ptr - pre-checked for NULL 3424 // property_ptr - pre-checked for NULL 3425 jvmtiError 3426 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) { 3427 jvmtiError err = JVMTI_ERROR_NONE; 3428 3429 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties()); 3430 3431 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr); 3432 if (err != JVMTI_ERROR_NONE) { 3433 return err; 3434 } 3435 int i = 0 ; 3436 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) { 3437 const char *key = p->key(); 3438 char **tmp_value = *property_ptr+i; 3439 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value); 3440 if (err == JVMTI_ERROR_NONE) { 3441 strcpy(*tmp_value, key); 3442 } else { 3443 // clean up previously allocated memory. 3444 for (int j=0; j<i; j++) { 3445 Deallocate((unsigned char*)*property_ptr+j); 3446 } 3447 Deallocate((unsigned char*)property_ptr); 3448 break; 3449 } 3450 } 3451 return err; 3452 } /* end GetSystemProperties */ 3453 3454 3455 // property - pre-checked for NULL 3456 // value_ptr - pre-checked for NULL 3457 jvmtiError 3458 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) { 3459 jvmtiError err = JVMTI_ERROR_NONE; 3460 const char *value; 3461 3462 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property); 3463 if (value == NULL) { 3464 err = JVMTI_ERROR_NOT_AVAILABLE; 3465 } else { 3466 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr); 3467 if (err == JVMTI_ERROR_NONE) { 3468 strcpy(*value_ptr, value); 3469 } 3470 } 3471 return err; 3472 } /* end GetSystemProperty */ 3473 3474 3475 // property - pre-checked for NULL 3476 // value - NULL is a valid value, must be checked 3477 jvmtiError 3478 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) { 3479 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE; 3480 3481 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 3482 if (strcmp(property, p->key()) == 0) { 3483 if (p->set_value((char *)value_ptr)) { 3484 err = JVMTI_ERROR_NONE; 3485 } 3486 } 3487 } 3488 return err; 3489 } /* end SetSystemProperty */