1 /* 2 * Copyright (c) 2003, 2022, 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/javaClasses.inline.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/modules.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "classfile/vmClasses.hpp" 32 #include "classfile/vmSymbols.hpp" 33 #include "gc/shared/collectedHeap.hpp" 34 #include "interpreter/bytecodeStream.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "jfr/jfrEvents.hpp" 37 #include "jvmtifiles/jvmtiEnv.hpp" 38 #include "logging/log.hpp" 39 #include "logging/logConfiguration.hpp" 40 #include "memory/allocation.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "memory/universe.hpp" 43 #include "oops/instanceKlass.hpp" 44 #include "oops/klass.inline.hpp" 45 #include "oops/objArrayOop.inline.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "prims/jniCheck.hpp" 48 #include "prims/jvm_misc.hpp" 49 #include "prims/jvmtiAgentThread.hpp" 50 #include "prims/jvmtiClassFileReconstituter.hpp" 51 #include "prims/jvmtiCodeBlobEvents.hpp" 52 #include "prims/jvmtiExtensions.hpp" 53 #include "prims/jvmtiGetLoadedClasses.hpp" 54 #include "prims/jvmtiImpl.hpp" 55 #include "prims/jvmtiManageCapabilities.hpp" 56 #include "prims/jvmtiRawMonitor.hpp" 57 #include "prims/jvmtiRedefineClasses.hpp" 58 #include "prims/jvmtiTagMap.hpp" 59 #include "prims/jvmtiThreadState.inline.hpp" 60 #include "prims/jvmtiUtil.hpp" 61 #include "runtime/arguments.hpp" 62 #include "runtime/deoptimization.hpp" 63 #include "runtime/fieldDescriptor.inline.hpp" 64 #include "runtime/handles.inline.hpp" 65 #include "runtime/interfaceSupport.inline.hpp" 66 #include "runtime/javaCalls.hpp" 67 #include "runtime/javaThread.inline.hpp" 68 #include "runtime/jfieldIDWorkaround.hpp" 69 #include "runtime/jniHandles.inline.hpp" 70 #include "runtime/objectMonitor.inline.hpp" 71 #include "runtime/os.hpp" 72 #include "runtime/osThread.hpp" 73 #include "runtime/reflectionUtils.hpp" 74 #include "runtime/signature.hpp" 75 #include "runtime/threadHeapSampler.hpp" 76 #include "runtime/threads.hpp" 77 #include "runtime/threadSMR.hpp" 78 #include "runtime/timerTrace.hpp" 79 #include "runtime/vframe.inline.hpp" 80 #include "runtime/vmThread.hpp" 81 #include "services/threadService.hpp" 82 #include "utilities/exceptions.hpp" 83 #include "utilities/preserveException.hpp" 84 #include "utilities/utf8.hpp" 85 86 87 #define FIXLATER 0 // REMOVE this when completed. 88 89 // FIXLATER: hook into JvmtiTrace 90 #define TraceJVMTICalls false 91 92 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) { 93 } 94 95 JvmtiEnv::~JvmtiEnv() { 96 } 97 98 JvmtiEnv* 99 JvmtiEnv::create_a_jvmti(jint version) { 100 return new JvmtiEnv(version); 101 } 102 103 // VM operation class to copy jni function table at safepoint. 104 // More than one java threads or jvmti agents may be reading/ 105 // modifying jni function tables. To reduce the risk of bad 106 // interaction b/w these threads it is copied at safepoint. 107 class VM_JNIFunctionTableCopier : public VM_Operation { 108 private: 109 const struct JNINativeInterface_ *_function_table; 110 public: 111 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) { 112 _function_table = func_tbl; 113 }; 114 115 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; } 116 void doit() { 117 copy_jni_function_table(_function_table); 118 }; 119 }; 120 121 // 122 // Do not change the "prefix" marker below, everything above it is copied 123 // unchanged into the filled stub, everything below is controlled by the 124 // stub filler (only method bodies are carried forward, and then only for 125 // functionality still in the spec). 126 // 127 // end file prefix 128 129 // 130 // Memory Management functions 131 // 132 133 // mem_ptr - pre-checked for NULL 134 jvmtiError 135 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) { 136 return allocate(size, mem_ptr); 137 } /* end Allocate */ 138 139 140 // mem - NULL is a valid value, must be checked 141 jvmtiError 142 JvmtiEnv::Deallocate(unsigned char* mem) { 143 return deallocate(mem); 144 } /* end Deallocate */ 145 146 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 147 // data - NULL is a valid value, must be checked 148 jvmtiError 149 JvmtiEnv::SetThreadLocalStorage(jthread thread, const void* data) { 150 JavaThread* current = JavaThread::current(); 151 JvmtiThreadState* state = NULL; 152 JvmtiVTMSTransitionDisabler disabler; 153 ThreadsListHandle tlh(current); 154 155 JavaThread* java_thread = NULL; 156 oop thread_obj = NULL; 157 if (thread == NULL) { 158 java_thread = current; 159 state = java_thread->jvmti_thread_state(); 160 } else { 161 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 162 if (err != JVMTI_ERROR_NONE) { 163 return err; 164 } 165 state = java_lang_Thread::jvmti_thread_state(thread_obj); 166 } 167 if (state == NULL) { 168 if (data == NULL) { 169 // leaving state unset same as data set to NULL 170 return JVMTI_ERROR_NONE; 171 } 172 // otherwise, create the state 173 HandleMark hm(current); 174 Handle thread_handle(current, thread_obj); 175 state = JvmtiThreadState::state_for(java_thread, thread_handle); 176 if (state == NULL) { 177 return JVMTI_ERROR_THREAD_NOT_ALIVE; 178 } 179 } 180 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data); 181 return JVMTI_ERROR_NONE; 182 } /* end SetThreadLocalStorage */ 183 184 185 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 186 // data_ptr - pre-checked for NULL 187 jvmtiError 188 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) { 189 JavaThread* current_thread = JavaThread::current(); 190 if (thread == NULL) { 191 JvmtiThreadState* state = current_thread->jvmti_thread_state(); 192 *data_ptr = (state == NULL) ? NULL : 193 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 194 } else { 195 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition 196 // the thread to _thread_in_vm. However, when the TLS for a thread 197 // other than the current thread is required we need to transition 198 // from native so as to resolve the jthread. 199 200 MACOS_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, current_thread)); 201 ThreadInVMfromNative __tiv(current_thread); 202 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread) 203 debug_only(VMNativeEntryWrapper __vew;) 204 205 JvmtiVTMSTransitionDisabler disabler; 206 ThreadsListHandle tlh(current_thread); 207 208 JavaThread* java_thread = NULL; 209 oop thread_obj = NULL; 210 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 211 if (err != JVMTI_ERROR_NONE) { 212 return err; 213 } 214 215 HandleMark hm(current_thread); 216 Handle thread_handle(current_thread, thread_obj); 217 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread, thread_handle); 218 *data_ptr = (state == NULL) ? NULL : 219 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 220 } 221 return JVMTI_ERROR_NONE; 222 } /* end GetThreadLocalStorage */ 223 224 // 225 // Module functions 226 // 227 228 // module_count_ptr - pre-checked for NULL 229 // modules_ptr - pre-checked for NULL 230 jvmtiError 231 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) { 232 JvmtiModuleClosure jmc; 233 234 return jmc.get_all_modules(this, module_count_ptr, modules_ptr); 235 } /* end GetAllModules */ 236 237 238 // class_loader - NULL is a valid value, must be pre-checked 239 // package_name - pre-checked for NULL 240 // module_ptr - pre-checked for NULL 241 jvmtiError 242 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) { 243 JavaThread* THREAD = JavaThread::current(); // For exception macros. 244 ResourceMark rm(THREAD); 245 246 Handle h_loader (THREAD, JNIHandles::resolve(class_loader)); 247 // Check that loader is a subclass of java.lang.ClassLoader. 248 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) { 249 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 250 } 251 oop module = Modules::get_named_module(h_loader, package_name); 252 *module_ptr = module != NULL ? JNIHandles::make_local(THREAD, module) : NULL; 253 return JVMTI_ERROR_NONE; 254 } /* end GetNamedModule */ 255 256 257 // module - pre-checked for NULL 258 // to_module - pre-checked for NULL 259 jvmtiError 260 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) { 261 JavaThread* THREAD = JavaThread::current(); // For exception macros. 262 263 // check module 264 Handle h_module(THREAD, JNIHandles::resolve(module)); 265 if (!java_lang_Module::is_instance(h_module())) { 266 return JVMTI_ERROR_INVALID_MODULE; 267 } 268 // check to_module 269 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 270 if (!java_lang_Module::is_instance(h_to_module())) { 271 return JVMTI_ERROR_INVALID_MODULE; 272 } 273 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD); 274 } /* end AddModuleReads */ 275 276 277 // module - pre-checked for NULL 278 // pkg_name - pre-checked for NULL 279 // to_module - pre-checked for NULL 280 jvmtiError 281 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) { 282 JavaThread* THREAD = JavaThread::current(); // For exception macros. 283 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD); 284 285 // check module 286 Handle h_module(THREAD, JNIHandles::resolve(module)); 287 if (!java_lang_Module::is_instance(h_module())) { 288 return JVMTI_ERROR_INVALID_MODULE; 289 } 290 // check to_module 291 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 292 if (!java_lang_Module::is_instance(h_to_module())) { 293 return JVMTI_ERROR_INVALID_MODULE; 294 } 295 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD); 296 } /* end AddModuleExports */ 297 298 299 // module - pre-checked for NULL 300 // pkg_name - pre-checked for NULL 301 // to_module - pre-checked for NULL 302 jvmtiError 303 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) { 304 JavaThread* THREAD = JavaThread::current(); // For exception macros. 305 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD); 306 307 // check module 308 Handle h_module(THREAD, JNIHandles::resolve(module)); 309 if (!java_lang_Module::is_instance(h_module())) { 310 return JVMTI_ERROR_INVALID_MODULE; 311 } 312 // check to_module 313 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 314 if (!java_lang_Module::is_instance(h_to_module())) { 315 return JVMTI_ERROR_INVALID_MODULE; 316 } 317 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD); 318 } /* end AddModuleOpens */ 319 320 321 // module - pre-checked for NULL 322 // service - pre-checked for NULL 323 jvmtiError 324 JvmtiEnv::AddModuleUses(jobject module, jclass service) { 325 JavaThread* THREAD = JavaThread::current(); // For exception macros. 326 327 // check module 328 Handle h_module(THREAD, JNIHandles::resolve(module)); 329 if (!java_lang_Module::is_instance(h_module())) { 330 return JVMTI_ERROR_INVALID_MODULE; 331 } 332 // check service 333 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service)); 334 if (!java_lang_Class::is_instance(h_service()) || 335 java_lang_Class::is_primitive(h_service())) { 336 return JVMTI_ERROR_INVALID_CLASS; 337 } 338 return JvmtiExport::add_module_uses(h_module, h_service, THREAD); 339 } /* end AddModuleUses */ 340 341 342 // module - pre-checked for NULL 343 // service - pre-checked for NULL 344 // impl_class - pre-checked for NULL 345 jvmtiError 346 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) { 347 JavaThread* THREAD = JavaThread::current(); // For exception macros. 348 349 // check module 350 Handle h_module(THREAD, JNIHandles::resolve(module)); 351 if (!java_lang_Module::is_instance(h_module())) { 352 return JVMTI_ERROR_INVALID_MODULE; 353 } 354 // check service 355 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service)); 356 if (!java_lang_Class::is_instance(h_service()) || 357 java_lang_Class::is_primitive(h_service())) { 358 return JVMTI_ERROR_INVALID_CLASS; 359 } 360 // check impl_class 361 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class)); 362 if (!java_lang_Class::is_instance(h_impl_class()) || 363 java_lang_Class::is_primitive(h_impl_class())) { 364 return JVMTI_ERROR_INVALID_CLASS; 365 } 366 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD); 367 } /* end AddModuleProvides */ 368 369 // module - pre-checked for NULL 370 // is_modifiable_class_ptr - pre-checked for NULL 371 jvmtiError 372 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) { 373 JavaThread* current = JavaThread::current(); 374 375 // check module 376 Handle h_module(current, JNIHandles::resolve(module)); 377 if (!java_lang_Module::is_instance(h_module())) { 378 return JVMTI_ERROR_INVALID_MODULE; 379 } 380 381 *is_modifiable_module_ptr = JNI_TRUE; 382 return JVMTI_ERROR_NONE; 383 } /* end IsModifiableModule */ 384 385 386 // 387 // Class functions 388 // 389 390 // class_count_ptr - pre-checked for NULL 391 // classes_ptr - pre-checked for NULL 392 jvmtiError 393 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) { 394 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr); 395 } /* end GetLoadedClasses */ 396 397 398 // initiating_loader - NULL is a valid value, must be checked 399 // class_count_ptr - pre-checked for NULL 400 // classes_ptr - pre-checked for NULL 401 jvmtiError 402 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) { 403 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader, 404 class_count_ptr, classes_ptr); 405 } /* end GetClassLoaderClasses */ 406 407 // k_mirror - may be primitive, this must be checked 408 // is_modifiable_class_ptr - pre-checked for NULL 409 jvmtiError 410 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) { 411 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)? 412 JNI_TRUE : JNI_FALSE; 413 return JVMTI_ERROR_NONE; 414 } /* end IsModifiableClass */ 415 416 // class_count - pre-checked to be greater than or equal to 0 417 // classes - pre-checked for NULL 418 jvmtiError 419 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) { 420 //TODO: add locking 421 422 int index; 423 JavaThread* current_thread = JavaThread::current(); 424 ResourceMark rm(current_thread); 425 426 jvmtiClassDefinition* class_definitions = 427 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count); 428 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY); 429 430 for (index = 0; index < class_count; index++) { 431 HandleMark hm(current_thread); 432 433 jclass jcls = classes[index]; 434 oop k_mirror = JNIHandles::resolve_external_guard(jcls); 435 if (k_mirror == NULL) { 436 return JVMTI_ERROR_INVALID_CLASS; 437 } 438 if (!k_mirror->is_a(vmClasses::Class_klass())) { 439 return JVMTI_ERROR_INVALID_CLASS; 440 } 441 442 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) { 443 return JVMTI_ERROR_UNMODIFIABLE_CLASS; 444 } 445 446 Klass* klass = java_lang_Class::as_Klass(k_mirror); 447 448 jint status = klass->jvmti_class_status(); 449 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 450 return JVMTI_ERROR_INVALID_CLASS; 451 } 452 453 InstanceKlass* ik = InstanceKlass::cast(klass); 454 if (ik->get_cached_class_file_bytes() == NULL) { 455 // Not cached, we need to reconstitute the class file from the 456 // VM representation. We don't attach the reconstituted class 457 // bytes to the InstanceKlass here because they have not been 458 // validated and we're not at a safepoint. 459 JvmtiClassFileReconstituter reconstituter(ik); 460 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 461 return reconstituter.get_error(); 462 } 463 464 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size(); 465 class_definitions[index].class_bytes = (unsigned char*) 466 reconstituter.class_file_bytes(); 467 } else { 468 // it is cached, get it from the cache 469 class_definitions[index].class_byte_count = ik->get_cached_class_file_len(); 470 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes(); 471 } 472 class_definitions[index].klass = jcls; 473 } 474 EventRetransformClasses event; 475 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform); 476 VMThread::execute(&op); 477 jvmtiError error = op.check_error(); 478 if (error == JVMTI_ERROR_NONE) { 479 event.set_classCount(class_count); 480 event.set_redefinitionId(op.id()); 481 event.commit(); 482 } 483 return error; 484 } /* end RetransformClasses */ 485 486 487 // class_count - pre-checked to be greater than or equal to 0 488 // class_definitions - pre-checked for NULL 489 jvmtiError 490 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) { 491 //TODO: add locking 492 EventRedefineClasses event; 493 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine); 494 VMThread::execute(&op); 495 jvmtiError error = op.check_error(); 496 if (error == JVMTI_ERROR_NONE) { 497 event.set_classCount(class_count); 498 event.set_redefinitionId(op.id()); 499 event.commit(); 500 } 501 return error; 502 } /* end RedefineClasses */ 503 504 505 // 506 // Object functions 507 // 508 509 // size_ptr - pre-checked for NULL 510 jvmtiError 511 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) { 512 oop mirror = JNIHandles::resolve_external_guard(object); 513 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 514 *size_ptr = (jlong)mirror->size() * wordSize; 515 return JVMTI_ERROR_NONE; 516 } /* end GetObjectSize */ 517 518 // 519 // Method functions 520 // 521 522 // prefix - NULL is a valid value, must be checked 523 jvmtiError 524 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) { 525 return prefix == NULL? 526 SetNativeMethodPrefixes(0, NULL) : 527 SetNativeMethodPrefixes(1, (char**)&prefix); 528 } /* end SetNativeMethodPrefix */ 529 530 531 // prefix_count - pre-checked to be greater than or equal to 0 532 // prefixes - pre-checked for NULL 533 jvmtiError 534 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) { 535 // Have to grab JVMTI thread state lock to be sure that some thread 536 // isn't accessing the prefixes at the same time we are setting them. 537 // No locks during VM bring-up. 538 if (Threads::number_of_threads() == 0) { 539 return set_native_method_prefixes(prefix_count, prefixes); 540 } else { 541 MutexLocker mu(JvmtiThreadState_lock); 542 return set_native_method_prefixes(prefix_count, prefixes); 543 } 544 } /* end SetNativeMethodPrefixes */ 545 546 // 547 // Event Management functions 548 // 549 550 // callbacks - NULL is a valid value, must be checked 551 // size_of_callbacks - pre-checked to be greater than or equal to 0 552 jvmtiError 553 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) { 554 JvmtiVTMSTransitionDisabler disabler; 555 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks); 556 return JVMTI_ERROR_NONE; 557 } /* end SetEventCallbacks */ 558 559 560 // event_thread - NULL is a valid value, must be checked 561 jvmtiError 562 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) { 563 bool enabled = (mode == JVMTI_ENABLE); 564 565 // event_type must be valid 566 if (!JvmtiEventController::is_valid_event_type(event_type)) { 567 return JVMTI_ERROR_INVALID_EVENT_TYPE; 568 } 569 570 // assure that needed capabilities are present 571 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { 572 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 573 } 574 575 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { 576 record_class_file_load_hook_enabled(); 577 } 578 JvmtiVTMSTransitionDisabler disabler; 579 580 if (event_thread == NULL) { 581 // Can be called at Agent_OnLoad() time with event_thread == NULL 582 // when Thread::current() does not work yet so we cannot create a 583 // ThreadsListHandle that is common to both thread-specific and 584 // global code paths. 585 586 JvmtiEventController::set_user_enabled(this, NULL, (oop) NULL, event_type, enabled); 587 } else { 588 // We have a specified event_thread. 589 ThreadsListHandle tlh; 590 591 JavaThread* java_thread = NULL; 592 oop thread_obj = NULL; 593 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), event_thread, &java_thread, &thread_obj); 594 if (err != JVMTI_ERROR_NONE) { 595 return err; 596 } 597 598 // global events cannot be controlled at thread level. 599 if (JvmtiEventController::is_global_event(event_type)) { 600 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 601 } 602 603 JvmtiEventController::set_user_enabled(this, java_thread, thread_obj, event_type, enabled); 604 } 605 606 return JVMTI_ERROR_NONE; 607 } /* end SetEventNotificationMode */ 608 609 // 610 // Capability functions 611 // 612 613 // capabilities_ptr - pre-checked for NULL 614 jvmtiError 615 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) { 616 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(), 617 get_prohibited_capabilities(), 618 capabilities_ptr); 619 return JVMTI_ERROR_NONE; 620 } /* end GetPotentialCapabilities */ 621 622 623 // capabilities_ptr - pre-checked for NULL 624 jvmtiError 625 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) { 626 return JvmtiManageCapabilities::add_capabilities(get_capabilities(), 627 get_prohibited_capabilities(), 628 capabilities_ptr, 629 get_capabilities()); 630 } /* end AddCapabilities */ 631 632 633 // capabilities_ptr - pre-checked for NULL 634 jvmtiError 635 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) { 636 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities()); 637 return JVMTI_ERROR_NONE; 638 } /* end RelinquishCapabilities */ 639 640 641 // capabilities_ptr - pre-checked for NULL 642 jvmtiError 643 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) { 644 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr); 645 return JVMTI_ERROR_NONE; 646 } /* end GetCapabilities */ 647 648 // 649 // Class Loader Search functions 650 // 651 652 // segment - pre-checked for NULL 653 jvmtiError 654 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) { 655 jvmtiPhase phase = get_phase(); 656 if (phase == JVMTI_PHASE_ONLOAD) { 657 Arguments::append_sysclasspath(segment); 658 return JVMTI_ERROR_NONE; 659 } else if (use_version_1_0_semantics()) { 660 // This JvmtiEnv requested version 1.0 semantics and this function 661 // is only allowed in the ONLOAD phase in version 1.0 so we need to 662 // return an error here. 663 return JVMTI_ERROR_WRONG_PHASE; 664 } else if (phase == JVMTI_PHASE_LIVE) { 665 // The phase is checked by the wrapper that called this function, 666 // but this thread could be racing with the thread that is 667 // terminating the VM so we check one more time. 668 669 // create the zip entry 670 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true); 671 if (zip_entry == NULL) { 672 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 673 } 674 675 // add the jar file to the bootclasspath 676 log_info(class, load)("opened: %s", zip_entry->name()); 677 #if INCLUDE_CDS 678 ClassLoaderExt::append_boot_classpath(zip_entry); 679 #else 680 ClassLoader::add_to_boot_append_entries(zip_entry); 681 #endif 682 return JVMTI_ERROR_NONE; 683 } else { 684 return JVMTI_ERROR_WRONG_PHASE; 685 } 686 687 } /* end AddToBootstrapClassLoaderSearch */ 688 689 690 // segment - pre-checked for NULL 691 jvmtiError 692 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) { 693 jvmtiPhase phase = get_phase(); 694 695 if (phase == JVMTI_PHASE_ONLOAD) { 696 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 697 if (strcmp("java.class.path", p->key()) == 0) { 698 p->append_value(segment); 699 break; 700 } 701 } 702 return JVMTI_ERROR_NONE; 703 } else if (phase == JVMTI_PHASE_LIVE) { 704 // The phase is checked by the wrapper that called this function, 705 // but this thread could be racing with the thread that is 706 // terminating the VM so we check one more time. 707 JavaThread* THREAD = JavaThread::current(); // For exception macros. 708 HandleMark hm(THREAD); 709 710 // create the zip entry (which will open the zip file and hence 711 // check that the segment is indeed a zip file). 712 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false); 713 if (zip_entry == NULL) { 714 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 715 } 716 delete zip_entry; // no longer needed 717 718 Handle loader(THREAD, SystemDictionary::java_system_loader()); 719 720 // need the path as java.lang.String 721 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD); 722 if (HAS_PENDING_EXCEPTION) { 723 CLEAR_PENDING_EXCEPTION; 724 return JVMTI_ERROR_INTERNAL; 725 } 726 727 // Invoke the appendToClassPathForInstrumentation method - if the method 728 // is not found it means the loader doesn't support adding to the class path 729 // in the live phase. 730 { 731 JavaValue res(T_VOID); 732 JavaCalls::call_special(&res, 733 loader, 734 loader->klass(), 735 vmSymbols::appendToClassPathForInstrumentation_name(), 736 vmSymbols::appendToClassPathForInstrumentation_signature(), 737 path, 738 THREAD); 739 if (HAS_PENDING_EXCEPTION) { 740 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 741 CLEAR_PENDING_EXCEPTION; 742 743 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) { 744 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED; 745 } else { 746 return JVMTI_ERROR_INTERNAL; 747 } 748 } 749 } 750 751 return JVMTI_ERROR_NONE; 752 } else { 753 return JVMTI_ERROR_WRONG_PHASE; 754 } 755 } /* end AddToSystemClassLoaderSearch */ 756 757 // 758 // General functions 759 // 760 761 // phase_ptr - pre-checked for NULL 762 jvmtiError 763 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) { 764 *phase_ptr = phase(); 765 return JVMTI_ERROR_NONE; 766 } /* end GetPhase */ 767 768 769 jvmtiError 770 JvmtiEnv::DisposeEnvironment() { 771 dispose(); 772 return JVMTI_ERROR_NONE; 773 } /* end DisposeEnvironment */ 774 775 776 // data - NULL is a valid value, must be checked 777 jvmtiError 778 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) { 779 set_env_local_storage(data); 780 return JVMTI_ERROR_NONE; 781 } /* end SetEnvironmentLocalStorage */ 782 783 784 // data_ptr - pre-checked for NULL 785 jvmtiError 786 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) { 787 *data_ptr = (void*)get_env_local_storage(); 788 return JVMTI_ERROR_NONE; 789 } /* end GetEnvironmentLocalStorage */ 790 791 // version_ptr - pre-checked for NULL 792 jvmtiError 793 JvmtiEnv::GetVersionNumber(jint* version_ptr) { 794 *version_ptr = JVMTI_VERSION; 795 return JVMTI_ERROR_NONE; 796 } /* end GetVersionNumber */ 797 798 799 // name_ptr - pre-checked for NULL 800 jvmtiError 801 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) { 802 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) { 803 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 804 } 805 const char *name = JvmtiUtil::error_name(error); 806 if (name == NULL) { 807 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 808 } 809 size_t len = strlen(name) + 1; 810 jvmtiError err = allocate(len, (unsigned char**)name_ptr); 811 if (err == JVMTI_ERROR_NONE) { 812 memcpy(*name_ptr, name, len); 813 } 814 return err; 815 } /* end GetErrorName */ 816 817 818 jvmtiError 819 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) { 820 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info; 821 switch (flag) { 822 case JVMTI_VERBOSE_OTHER: 823 // ignore 824 break; 825 case JVMTI_VERBOSE_CLASS: 826 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload)); 827 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load)); 828 break; 829 case JVMTI_VERBOSE_GC: 830 LogConfiguration::configure_stdout(level, true, LOG_TAGS(gc)); 831 break; 832 case JVMTI_VERBOSE_JNI: 833 level = value == 0 ? LogLevel::Off : LogLevel::Debug; 834 LogConfiguration::configure_stdout(level, true, LOG_TAGS(jni, resolve)); 835 break; 836 default: 837 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 838 }; 839 return JVMTI_ERROR_NONE; 840 } /* end SetVerboseFlag */ 841 842 843 // format_ptr - pre-checked for NULL 844 jvmtiError 845 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) { 846 *format_ptr = JVMTI_JLOCATION_JVMBCI; 847 return JVMTI_ERROR_NONE; 848 } /* end GetJLocationFormat */ 849 850 // 851 // Thread functions 852 // 853 854 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 855 // thread_state_ptr - pre-checked for NULL 856 jvmtiError 857 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) { 858 JavaThread* current_thread = JavaThread::current(); 859 JvmtiVTMSTransitionDisabler disabler; 860 ThreadsListHandle tlh(current_thread); 861 862 JavaThread* java_thread = NULL; 863 oop thread_oop = NULL; 864 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 865 if (err != JVMTI_ERROR_NONE && err != JVMTI_ERROR_THREAD_NOT_ALIVE) { 866 // We got an error code so we don't have a JavaThread*, but only 867 // return an error from here if the error is not because the thread 868 // is a virtual thread. 869 return err; 870 } 871 872 if (java_lang_VirtualThread::is_instance(thread_oop)) { 873 *thread_state_ptr = JvmtiEnvBase::get_vthread_state(thread_oop, java_thread); 874 } else { 875 *thread_state_ptr = JvmtiEnvBase::get_thread_state(thread_oop, java_thread); 876 } 877 return JVMTI_ERROR_NONE; 878 } /* end GetThreadState */ 879 880 881 // thread_ptr - pre-checked for NULL 882 jvmtiError 883 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) { 884 JavaThread* cur_thread = JavaThread::current(); 885 oop thread_oop = get_vthread_or_thread_oop(cur_thread); 886 887 *thread_ptr = (jthread)JNIHandles::make_local(cur_thread, thread_oop); 888 return JVMTI_ERROR_NONE; 889 } /* end GetCurrentThread */ 890 891 892 // threads_count_ptr - pre-checked for NULL 893 // threads_ptr - pre-checked for NULL 894 jvmtiError 895 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) { 896 int nthreads = 0; 897 Handle *thread_objs = NULL; 898 Thread* current_thread = Thread::current(); 899 ResourceMark rm(current_thread); 900 HandleMark hm(current_thread); 901 902 // enumerate threads (including agent threads) 903 ThreadsListEnumerator tle(current_thread, true); 904 nthreads = tle.num_threads(); 905 *threads_count_ptr = nthreads; 906 907 if (nthreads == 0) { 908 *threads_ptr = NULL; 909 return JVMTI_ERROR_NONE; 910 } 911 912 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads); 913 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY); 914 915 for (int i = 0; i < nthreads; i++) { 916 thread_objs[i] = Handle(tle.get_threadObj(i)); 917 } 918 919 jthread *jthreads = new_jthreadArray(nthreads, thread_objs); 920 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY); 921 922 *threads_ptr = jthreads; 923 return JVMTI_ERROR_NONE; 924 } /* end GetAllThreads */ 925 926 927 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 928 jvmtiError 929 JvmtiEnv::SuspendThread(jthread thread) { 930 JavaThread* current = JavaThread::current(); 931 932 jvmtiError err; 933 JavaThread* java_thread = NULL; 934 oop thread_oop = NULL; 935 { 936 JvmtiVTMSTransitionDisabler disabler(true); 937 ThreadsListHandle tlh(current); 938 939 err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 940 if (err != JVMTI_ERROR_NONE) { 941 return err; 942 } 943 944 // Do not use JvmtiVTMSTransitionDisabler in context of self suspend to avoid deadlocks. 945 if (java_thread != current) { 946 err = suspend_thread(thread_oop, java_thread, /* single_suspend */ true, NULL); 947 return err; 948 } 949 } 950 // Do self suspend for current JavaThread. 951 err = suspend_thread(thread_oop, current, /* single_suspend */ true, NULL); 952 return err; 953 } /* end SuspendThread */ 954 955 956 // request_count - pre-checked to be greater than or equal to 0 957 // request_list - pre-checked for NULL 958 // results - pre-checked for NULL 959 jvmtiError 960 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 961 JavaThread* current = JavaThread::current(); 962 HandleMark hm(current); 963 Handle self_tobj = Handle(current, NULL); 964 int self_idx = -1; 965 966 { 967 JvmtiVTMSTransitionDisabler disabler(true); 968 ThreadsListHandle tlh(current); 969 970 for (int i = 0; i < request_count; i++) { 971 JavaThread *java_thread = NULL; 972 oop thread_oop = NULL; 973 jthread thread = request_list[i]; 974 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 975 976 if (thread_oop != NULL && 977 java_lang_VirtualThread::is_instance(thread_oop) && 978 !JvmtiEnvBase::is_vthread_alive(thread_oop)) { 979 err = JVMTI_ERROR_THREAD_NOT_ALIVE; 980 } 981 if (err != JVMTI_ERROR_NONE) { 982 if (thread_oop == NULL || err != JVMTI_ERROR_INVALID_THREAD) { 983 results[i] = err; 984 continue; 985 } 986 } 987 if (java_thread == current) { 988 self_idx = i; 989 self_tobj = Handle(current, thread_oop); 990 continue; // self suspend after all other suspends 991 } 992 results[i] = suspend_thread(thread_oop, java_thread, /* single_suspend */ true, NULL); 993 } 994 } 995 // Self suspend after all other suspends if necessary. 996 // Do not use JvmtiVTMSTransitionDisabler in context of self suspend to avoid deadlocks. 997 if (self_tobj() != NULL) { 998 // there should not be any error for current java_thread 999 results[self_idx] = suspend_thread(self_tobj(), current, /* single_suspend */ true, NULL); 1000 } 1001 // per-thread suspend results returned via results parameter 1002 return JVMTI_ERROR_NONE; 1003 } /* end SuspendThreadList */ 1004 1005 1006 jvmtiError 1007 JvmtiEnv::SuspendAllVirtualThreads(jint except_count, const jthread* except_list) { 1008 if (!JvmtiExport::can_support_virtual_threads()) { 1009 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 1010 } 1011 if (!Continuations::enabled()) { 1012 return JVMTI_ERROR_NONE; // Nothing to do when there are no virtual threads; 1013 } 1014 JavaThread* current = JavaThread::current(); 1015 HandleMark hm(current); 1016 Handle self_tobj = Handle(current, NULL); 1017 1018 { 1019 ResourceMark rm(current); 1020 JvmtiVTMSTransitionDisabler disabler(true); 1021 ThreadsListHandle tlh(current); 1022 GrowableArray<jthread>* elist = new GrowableArray<jthread>(except_count); 1023 1024 jvmtiError err = JvmtiEnvBase::check_thread_list(except_count, except_list); 1025 if (err != JVMTI_ERROR_NONE) { 1026 return err; 1027 } 1028 1029 // Collect threads from except_list for which resumed status must be restored. 1030 for (int idx = 0; idx < except_count; idx++) { 1031 jthread thread = except_list[idx]; 1032 oop thread_oop = JNIHandles::resolve_external_guard(thread); 1033 if (!JvmtiVTSuspender::is_vthread_suspended(thread_oop)) { 1034 // is not suspended, so its resumed status must be restored 1035 elist->append(except_list[idx]); 1036 } 1037 } 1038 1039 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *java_thread = jtiwh.next(); ) { 1040 oop vt_oop = java_thread->jvmti_vthread(); 1041 if (!java_thread->is_exiting() && 1042 !java_thread->is_jvmti_agent_thread() && 1043 !java_thread->is_hidden_from_external_view() && 1044 vt_oop != NULL && 1045 java_lang_VirtualThread::is_instance(vt_oop) && 1046 JvmtiEnvBase::is_vthread_alive(vt_oop) && 1047 !JvmtiVTSuspender::is_vthread_suspended(vt_oop) && 1048 !is_in_thread_list(except_count, except_list, vt_oop) 1049 ) { 1050 if (java_thread == current) { 1051 self_tobj = Handle(current, vt_oop); 1052 continue; // self suspend after all other suspends 1053 } 1054 suspend_thread(vt_oop, java_thread, /* single_suspend */ false, NULL); 1055 } 1056 } 1057 JvmtiVTSuspender::register_all_vthreads_suspend(); 1058 1059 // Restore resumed state for threads from except list that were not suspended before. 1060 for (int idx = 0; idx < elist->length(); idx++) { 1061 jthread thread = elist->at(idx); 1062 oop thread_oop = JNIHandles::resolve_external_guard(thread); 1063 if (JvmtiVTSuspender::is_vthread_suspended(thread_oop)) { 1064 JvmtiVTSuspender::register_vthread_resume(thread_oop); 1065 } 1066 } 1067 } 1068 // Self suspend after all other suspends if necessary. 1069 // Do not use JvmtiVTMSTransitionDisabler in context of self suspend to avoid deadlocks. 1070 if (self_tobj() != NULL) { 1071 suspend_thread(self_tobj(), current, /* single_suspend */ false, NULL); 1072 } 1073 return JVMTI_ERROR_NONE; 1074 } /* end SuspendAllVirtualThreads */ 1075 1076 1077 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1078 jvmtiError 1079 JvmtiEnv::ResumeThread(jthread thread) { 1080 JvmtiVTMSTransitionDisabler disabler(true); 1081 ThreadsListHandle tlh; 1082 1083 JavaThread* java_thread = NULL; 1084 oop thread_oop = NULL; 1085 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1086 if (err != JVMTI_ERROR_NONE) { 1087 return err; 1088 } 1089 err = resume_thread(thread_oop, java_thread, /* single_resume */ true); 1090 return err; 1091 } /* end ResumeThread */ 1092 1093 1094 // request_count - pre-checked to be greater than or equal to 0 1095 // request_list - pre-checked for NULL 1096 // results - pre-checked for NULL 1097 jvmtiError 1098 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 1099 oop thread_oop = NULL; 1100 JavaThread* java_thread = NULL; 1101 JvmtiVTMSTransitionDisabler disabler(true); 1102 ThreadsListHandle tlh; 1103 1104 for (int i = 0; i < request_count; i++) { 1105 jthread thread = request_list[i]; 1106 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1107 1108 if (thread_oop != NULL && 1109 java_lang_VirtualThread::is_instance(thread_oop) && 1110 !JvmtiEnvBase::is_vthread_alive(thread_oop)) { 1111 err = JVMTI_ERROR_THREAD_NOT_ALIVE; 1112 } 1113 if (err != JVMTI_ERROR_NONE) { 1114 if (thread_oop == NULL || err != JVMTI_ERROR_INVALID_THREAD) { 1115 results[i] = err; 1116 continue; 1117 } 1118 } 1119 results[i] = resume_thread(thread_oop, java_thread, /* single_resume */ true); 1120 } 1121 // per-thread resume results returned via results parameter 1122 return JVMTI_ERROR_NONE; 1123 } /* end ResumeThreadList */ 1124 1125 1126 jvmtiError 1127 JvmtiEnv::ResumeAllVirtualThreads(jint except_count, const jthread* except_list) { 1128 if (!JvmtiExport::can_support_virtual_threads()) { 1129 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 1130 } 1131 if (!Continuations::enabled()) { 1132 return JVMTI_ERROR_NONE; // Nothing to do when there are no virtual threads; 1133 } 1134 jvmtiError err = JvmtiEnvBase::check_thread_list(except_count, except_list); 1135 if (err != JVMTI_ERROR_NONE) { 1136 return err; 1137 } 1138 ResourceMark rm; 1139 JvmtiVTMSTransitionDisabler disabler(true); 1140 GrowableArray<jthread>* elist = new GrowableArray<jthread>(except_count); 1141 1142 // Collect threads from except_list for which suspended status must be restored. 1143 for (int idx = 0; idx < except_count; idx++) { 1144 jthread thread = except_list[idx]; 1145 oop thread_oop = JNIHandles::resolve_external_guard(thread); 1146 if (JvmtiVTSuspender::is_vthread_suspended(thread_oop)) { 1147 // is suspended, so its suspended status must be restored 1148 elist->append(except_list[idx]); 1149 } 1150 } 1151 1152 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *java_thread = jtiwh.next(); ) { 1153 oop vt_oop = java_thread->jvmti_vthread(); 1154 if (!java_thread->is_exiting() && 1155 !java_thread->is_jvmti_agent_thread() && 1156 !java_thread->is_hidden_from_external_view() && 1157 vt_oop != NULL && 1158 java_lang_VirtualThread::is_instance(vt_oop) && 1159 JvmtiEnvBase::is_vthread_alive(vt_oop) && 1160 JvmtiVTSuspender::is_vthread_suspended(vt_oop) && 1161 !is_in_thread_list(except_count, except_list, vt_oop) 1162 ) { 1163 resume_thread(vt_oop, java_thread, /* single_resume */ false); 1164 } 1165 } 1166 JvmtiVTSuspender::register_all_vthreads_resume(); 1167 1168 // Restore suspended state for threads from except list that were suspended before. 1169 for (int idx = 0; idx < elist->length(); idx++) { 1170 jthread thread = elist->at(idx); 1171 oop thread_oop = JNIHandles::resolve_external_guard(thread); 1172 if (!JvmtiVTSuspender::is_vthread_suspended(thread_oop)) { 1173 JvmtiVTSuspender::register_vthread_suspend(thread_oop); 1174 } 1175 } 1176 return JVMTI_ERROR_NONE; 1177 } /* end ResumeAllVirtualThreads */ 1178 1179 1180 jvmtiError 1181 JvmtiEnv::StopThread(jthread thread, jobject exception) { 1182 JavaThread* current_thread = JavaThread::current(); 1183 1184 JvmtiVTMSTransitionDisabler disabler; 1185 ThreadsListHandle tlh(current_thread); 1186 JavaThread* java_thread = NULL; 1187 oop thread_oop = NULL; 1188 1189 NULL_CHECK(thread, JVMTI_ERROR_INVALID_THREAD); 1190 1191 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1192 1193 if (thread_oop != NULL && java_lang_VirtualThread::is_instance(thread_oop)) { 1194 // No support for virtual threads (yet). 1195 return JVMTI_ERROR_UNSUPPORTED_OPERATION; 1196 } 1197 if (err != JVMTI_ERROR_NONE) { 1198 return err; 1199 } 1200 oop e = JNIHandles::resolve_external_guard(exception); 1201 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER); 1202 1203 JavaThread::send_async_exception(java_thread, e); 1204 1205 return JVMTI_ERROR_NONE; 1206 1207 } /* end StopThread */ 1208 1209 1210 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1211 jvmtiError 1212 JvmtiEnv::InterruptThread(jthread thread) { 1213 JavaThread* current_thread = JavaThread::current(); 1214 HandleMark hm(current_thread); 1215 1216 JvmtiVTMSTransitionDisabler disabler; 1217 ThreadsListHandle tlh(current_thread); 1218 1219 JavaThread* java_thread = NULL; 1220 oop thread_obj = NULL; 1221 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 1222 if (err != JVMTI_ERROR_NONE) { 1223 return err; 1224 } 1225 1226 if (java_lang_VirtualThread::is_instance(thread_obj)) { 1227 // For virtual threads we have to call into Java to interrupt: 1228 Handle obj(current_thread, thread_obj); 1229 JavaValue result(T_VOID); 1230 JavaCalls::call_virtual(&result, 1231 obj, 1232 vmClasses::Thread_klass(), 1233 vmSymbols::interrupt_method_name(), 1234 vmSymbols::void_method_signature(), 1235 current_thread); 1236 1237 return JVMTI_ERROR_NONE; 1238 } 1239 1240 // Really this should be a Java call to Thread.interrupt to ensure the same 1241 // semantics, however historically this has not been done for some reason. 1242 // So we continue with that (which means we don't interact with any Java-level 1243 // Interruptible object) but we must set the Java-level interrupted state. 1244 java_lang_Thread::set_interrupted(thread_obj, true); 1245 java_thread->interrupt(); 1246 1247 return JVMTI_ERROR_NONE; 1248 } /* end InterruptThread */ 1249 1250 1251 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1252 // info_ptr - pre-checked for NULL 1253 jvmtiError 1254 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) { 1255 JavaThread* current_thread = JavaThread::current(); 1256 ResourceMark rm(current_thread); 1257 HandleMark hm(current_thread); 1258 JavaThread* java_thread = NULL; 1259 oop thread_oop = NULL; 1260 1261 JvmtiVTMSTransitionDisabler disabler; 1262 ThreadsListHandle tlh(current_thread); 1263 1264 // if thread is NULL the current thread is used 1265 if (thread == NULL) { 1266 java_thread = JavaThread::current(); 1267 thread_oop = get_vthread_or_thread_oop(java_thread); 1268 if (thread_oop == NULL || !thread_oop->is_a(vmClasses::Thread_klass())) { 1269 return JVMTI_ERROR_INVALID_THREAD; 1270 } 1271 } else { 1272 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1273 if (err != JVMTI_ERROR_NONE) { 1274 // We got an error code so we don't have a JavaThread *, but 1275 // only return an error from here if we didn't get a valid 1276 // thread_oop. 1277 // In the virtual thread case the cv_external_thread_to_JavaThread is expected to correctly set 1278 // the thread_oop and return JVMTI_ERROR_INVALID_THREAD which we ignore here. 1279 if (thread_oop == NULL) { 1280 return err; 1281 } 1282 } 1283 } 1284 // We have a valid thread_oop so we can return some thread info. 1285 1286 Handle thread_obj(current_thread, thread_oop); 1287 Handle name; 1288 ThreadPriority priority; 1289 Handle thread_group; 1290 Handle context_class_loader; 1291 bool is_daemon; 1292 1293 name = Handle(current_thread, java_lang_Thread::name(thread_obj())); 1294 1295 if (java_lang_VirtualThread::is_instance(thread_obj())) { 1296 priority = (ThreadPriority)JVMTI_THREAD_NORM_PRIORITY; 1297 is_daemon = true; 1298 if (java_lang_VirtualThread::state(thread_obj()) == java_lang_VirtualThread::TERMINATED) { 1299 thread_group = Handle(current_thread, NULL); 1300 } else { 1301 thread_group = Handle(current_thread, java_lang_Thread_Constants::get_VTHREAD_GROUP()); 1302 } 1303 } else { 1304 priority = java_lang_Thread::priority(thread_obj()); 1305 is_daemon = java_lang_Thread::is_daemon(thread_obj()); 1306 if (java_lang_Thread::get_thread_status(thread_obj()) == JavaThreadStatus::TERMINATED) { 1307 thread_group = Handle(current_thread, NULL); 1308 } else { 1309 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj())); 1310 } 1311 } 1312 1313 oop loader = java_lang_Thread::context_class_loader(thread_obj()); 1314 if (loader != NULL) { 1315 // Do the same as Thread.getContextClassLoader and set context_class_loader to be 1316 // the system class loader when the field value is the "not supported" placeholder. 1317 if (loader == java_lang_Thread_Constants::get_NOT_SUPPORTED_CLASSLOADER()) { 1318 loader = SystemDictionary::java_system_loader(); 1319 } 1320 } 1321 context_class_loader = Handle(current_thread, loader); 1322 1323 { const char *n; 1324 1325 if (name() != NULL) { 1326 n = java_lang_String::as_utf8_string(name()); 1327 } else { 1328 int utf8_length = 0; 1329 n = UNICODE::as_utf8((jchar*) NULL, utf8_length); 1330 } 1331 1332 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1); 1333 if (info_ptr->name == NULL) 1334 return JVMTI_ERROR_OUT_OF_MEMORY; 1335 1336 strcpy(info_ptr->name, n); 1337 } 1338 info_ptr->is_daemon = is_daemon; 1339 info_ptr->priority = priority; 1340 1341 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL : 1342 jni_reference(context_class_loader); 1343 info_ptr->thread_group = jni_reference(thread_group); 1344 1345 return JVMTI_ERROR_NONE; 1346 } /* end GetThreadInfo */ 1347 1348 1349 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1350 // owned_monitor_count_ptr - pre-checked for NULL 1351 // owned_monitors_ptr - pre-checked for NULL 1352 jvmtiError 1353 JvmtiEnv::GetOwnedMonitorInfo(jthread thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) { 1354 JavaThread* calling_thread = JavaThread::current(); 1355 HandleMark hm(calling_thread); 1356 1357 // growable array of jvmti monitors info on the C-heap 1358 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1359 new (mtServiceability) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, mtServiceability); 1360 1361 JvmtiVTMSTransitionDisabler disabler; 1362 ThreadsListHandle tlh(calling_thread); 1363 1364 JavaThread* java_thread = NULL; 1365 oop thread_oop = NULL; 1366 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1367 if (err != JVMTI_ERROR_NONE) { 1368 delete owned_monitors_list; 1369 return err; 1370 } 1371 1372 if (java_lang_VirtualThread::is_instance(thread_oop)) { 1373 // There is no monitor info to collect if target virtual thread is unmounted. 1374 if (java_thread != NULL) { 1375 VirtualThreadGetOwnedMonitorInfoClosure op(this, 1376 Handle(calling_thread, thread_oop), 1377 owned_monitors_list); 1378 Handshake::execute(&op, java_thread); 1379 err = op.result(); 1380 } 1381 } else { 1382 EscapeBarrier eb(true, calling_thread, java_thread); 1383 if (!eb.deoptimize_objects(MaxJavaStackTraceDepth)) { 1384 delete owned_monitors_list; 1385 return JVMTI_ERROR_OUT_OF_MEMORY; 1386 } 1387 1388 if (java_thread == calling_thread) { 1389 // It is only safe to make a direct call on the current thread. 1390 // All other usage needs to use a direct handshake for safety. 1391 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1392 } else { 1393 // get owned monitors info with handshake 1394 GetOwnedMonitorInfoClosure op(calling_thread, this, owned_monitors_list); 1395 Handshake::execute(&op, java_thread); 1396 err = op.result(); 1397 } 1398 } 1399 1400 jint owned_monitor_count = owned_monitors_list->length(); 1401 if (err == JVMTI_ERROR_NONE) { 1402 if ((err = allocate(owned_monitor_count * sizeof(jobject *), 1403 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) { 1404 // copy into the returned array 1405 for (int i = 0; i < owned_monitor_count; i++) { 1406 (*owned_monitors_ptr)[i] = 1407 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1408 } 1409 *owned_monitor_count_ptr = owned_monitor_count; 1410 } 1411 } 1412 // clean up. 1413 for (int i = 0; i < owned_monitor_count; i++) { 1414 deallocate((unsigned char*)owned_monitors_list->at(i)); 1415 } 1416 delete owned_monitors_list; 1417 1418 return err; 1419 } /* end GetOwnedMonitorInfo */ 1420 1421 1422 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1423 // monitor_info_count_ptr - pre-checked for NULL 1424 // monitor_info_ptr - pre-checked for NULL 1425 jvmtiError 1426 JvmtiEnv::GetOwnedMonitorStackDepthInfo(jthread thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) { 1427 JavaThread* calling_thread = JavaThread::current(); 1428 HandleMark hm(calling_thread); 1429 1430 // growable array of jvmti monitors info on the C-heap 1431 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1432 new (mtServiceability) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, mtServiceability); 1433 1434 JvmtiVTMSTransitionDisabler disabler; 1435 ThreadsListHandle tlh(calling_thread); 1436 1437 JavaThread* java_thread = NULL; 1438 oop thread_oop = NULL; 1439 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1440 if (err != JVMTI_ERROR_NONE) { 1441 delete owned_monitors_list; 1442 return err; 1443 } 1444 1445 if (java_lang_VirtualThread::is_instance(thread_oop)) { 1446 // There is no monitor info to collect if target virtual thread is unmounted. 1447 if (java_thread != NULL) { 1448 VirtualThreadGetOwnedMonitorInfoClosure op(this, 1449 Handle(calling_thread, thread_oop), 1450 owned_monitors_list); 1451 Handshake::execute(&op, java_thread); 1452 err = op.result(); 1453 } 1454 } else { 1455 EscapeBarrier eb(true, calling_thread, java_thread); 1456 if (!eb.deoptimize_objects(MaxJavaStackTraceDepth)) { 1457 delete owned_monitors_list; 1458 return JVMTI_ERROR_OUT_OF_MEMORY; 1459 } 1460 1461 if (java_thread == calling_thread) { 1462 // It is only safe to make a direct call on the current thread. 1463 // All other usage needs to use a direct handshake for safety. 1464 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1465 } else { 1466 // get owned monitors info with handshake 1467 GetOwnedMonitorInfoClosure op(calling_thread, this, owned_monitors_list); 1468 Handshake::execute(&op, java_thread); 1469 err = op.result(); 1470 } 1471 } 1472 jint owned_monitor_count = owned_monitors_list->length(); 1473 if (err == JVMTI_ERROR_NONE) { 1474 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo), 1475 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) { 1476 // copy to output array. 1477 for (int i = 0; i < owned_monitor_count; i++) { 1478 (*monitor_info_ptr)[i].monitor = 1479 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1480 (*monitor_info_ptr)[i].stack_depth = 1481 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth; 1482 } 1483 } 1484 *monitor_info_count_ptr = owned_monitor_count; 1485 } 1486 1487 // clean up. 1488 for (int i = 0; i < owned_monitor_count; i++) { 1489 deallocate((unsigned char*)owned_monitors_list->at(i)); 1490 } 1491 delete owned_monitors_list; 1492 1493 return err; 1494 } /* end GetOwnedMonitorStackDepthInfo */ 1495 1496 1497 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1498 // monitor_ptr - pre-checked for NULL 1499 jvmtiError 1500 JvmtiEnv::GetCurrentContendedMonitor(jthread thread, jobject* monitor_ptr) { 1501 JavaThread* calling_thread = JavaThread::current(); 1502 HandleMark hm(calling_thread); 1503 1504 JvmtiVTMSTransitionDisabler disabler; 1505 ThreadsListHandle tlh(calling_thread); 1506 1507 JavaThread* java_thread = NULL; 1508 oop thread_oop = NULL; 1509 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1510 if (err != JVMTI_ERROR_NONE) { 1511 return err; 1512 } 1513 1514 if (java_lang_VirtualThread::is_instance(thread_oop)) { 1515 // There is no monitor info to collect if target virtual thread is unmounted. 1516 if (java_thread != NULL) { 1517 GetCurrentContendedMonitorClosure op(calling_thread, this, monitor_ptr, /* is_virtual */ true); 1518 Handshake::execute(&op, java_thread); 1519 err = op.result(); 1520 } else { 1521 *monitor_ptr = NULL; 1522 if (!JvmtiEnvBase::is_vthread_alive(thread_oop)) { 1523 err = JVMTI_ERROR_THREAD_NOT_ALIVE; 1524 } 1525 } 1526 return err; 1527 } 1528 if (java_thread == calling_thread) { 1529 // It is only safe to make a direct call on the current thread. 1530 // All other usage needs to use a direct handshake for safety. 1531 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr, /* is_virtual */ false); 1532 } else { 1533 // get contended monitor information with handshake 1534 GetCurrentContendedMonitorClosure op(calling_thread, this, monitor_ptr, /* is_virtual */ false); 1535 Handshake::execute(&op, java_thread); 1536 err = op.result(); 1537 } 1538 return err; 1539 } /* end GetCurrentContendedMonitor */ 1540 1541 1542 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1543 // proc - pre-checked for NULL 1544 // arg - NULL is a valid value, must be checked 1545 jvmtiError 1546 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) { 1547 JavaThread* current_thread = JavaThread::current(); 1548 1549 JavaThread* java_thread = NULL; 1550 oop thread_oop = NULL; 1551 ThreadsListHandle tlh(current_thread); 1552 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1553 if (err != JVMTI_ERROR_NONE) { 1554 // We got an error code so we don't have a JavaThread *, but 1555 // only return an error from here if we didn't get a valid 1556 // thread_oop. 1557 if (thread_oop == NULL) { 1558 return err; 1559 } 1560 // We have a valid thread_oop. 1561 } 1562 1563 if (java_thread != NULL) { 1564 // 'thread' refers to an existing JavaThread. 1565 return JVMTI_ERROR_INVALID_THREAD; 1566 } 1567 if (java_lang_VirtualThread::is_instance(thread_oop)) { 1568 // No support for virtual threads. 1569 return JVMTI_ERROR_UNSUPPORTED_OPERATION; 1570 } 1571 1572 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) { 1573 return JVMTI_ERROR_INVALID_PRIORITY; 1574 } 1575 1576 Handle thread_hndl(current_thread, thread_oop); 1577 1578 JvmtiAgentThread* new_thread = new JvmtiAgentThread(this, proc, arg); 1579 1580 // At this point it may be possible that no osthread was created for the 1581 // JavaThread due to lack of resources. 1582 if (new_thread->osthread() == NULL) { 1583 // The new thread is not known to Thread-SMR yet so we can just delete. 1584 delete new_thread; 1585 return JVMTI_ERROR_OUT_OF_MEMORY; 1586 } 1587 1588 JavaThread::start_internal_daemon(current_thread, new_thread, thread_hndl, 1589 (ThreadPriority)priority); 1590 1591 return JVMTI_ERROR_NONE; 1592 } /* end RunAgentThread */ 1593 1594 // 1595 // Thread Group functions 1596 // 1597 1598 // group_count_ptr - pre-checked for NULL 1599 // groups_ptr - pre-checked for NULL 1600 jvmtiError 1601 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) { 1602 JavaThread* current_thread = JavaThread::current(); 1603 1604 // Only one top level thread group now. 1605 *group_count_ptr = 1; 1606 1607 // Allocate memory to store global-refs to the thread groups. 1608 // Assume this area is freed by caller. 1609 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr)); 1610 1611 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY); 1612 1613 // Convert oop to Handle, then convert Handle to global-ref. 1614 { 1615 HandleMark hm(current_thread); 1616 Handle system_thread_group(current_thread, Universe::system_thread_group()); 1617 *groups_ptr[0] = jni_reference(system_thread_group); 1618 } 1619 1620 return JVMTI_ERROR_NONE; 1621 } /* end GetTopThreadGroups */ 1622 1623 1624 // info_ptr - pre-checked for NULL 1625 jvmtiError 1626 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) { 1627 Thread* current_thread = Thread::current(); 1628 ResourceMark rm(current_thread); 1629 HandleMark hm(current_thread); 1630 1631 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group)); 1632 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP); 1633 1634 const char* name; 1635 Handle parent_group; 1636 bool is_daemon; 1637 ThreadPriority max_priority; 1638 1639 name = java_lang_ThreadGroup::name(group_obj()); 1640 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj())); 1641 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj()); 1642 max_priority = java_lang_ThreadGroup::maxPriority(group_obj()); 1643 1644 info_ptr->is_daemon = is_daemon; 1645 info_ptr->max_priority = max_priority; 1646 info_ptr->parent = jni_reference(parent_group); 1647 1648 if (name != NULL) { 1649 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1); 1650 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY); 1651 strcpy(info_ptr->name, name); 1652 } else { 1653 info_ptr->name = NULL; 1654 } 1655 1656 return JVMTI_ERROR_NONE; 1657 } /* end GetThreadGroupInfo */ 1658 1659 // thread_count_ptr - pre-checked for NULL 1660 // threads_ptr - pre-checked for NULL 1661 // group_count_ptr - pre-checked for NULL 1662 // groups_ptr - pre-checked for NULL 1663 jvmtiError 1664 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) { 1665 jvmtiError err; 1666 JavaThread* current_thread = JavaThread::current(); 1667 oop group_obj = JNIHandles::resolve_external_guard(group); 1668 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP); 1669 1670 Handle *thread_objs = NULL; 1671 objArrayHandle group_objs; 1672 jint nthreads = 0; 1673 jint ngroups = 0; 1674 int hidden_threads = 0; 1675 1676 ResourceMark rm(current_thread); 1677 HandleMark hm(current_thread); 1678 1679 Handle group_hdl(current_thread, group_obj); 1680 1681 err = get_live_threads(current_thread, group_hdl, &nthreads, &thread_objs); 1682 if (err != JVMTI_ERROR_NONE) { 1683 return err; 1684 } 1685 err = get_subgroups(current_thread, group_hdl, &ngroups, &group_objs); 1686 if (err != JVMTI_ERROR_NONE) { 1687 return err; 1688 } 1689 1690 *group_count_ptr = ngroups; 1691 *thread_count_ptr = nthreads; 1692 *threads_ptr = new_jthreadArray(nthreads, thread_objs); 1693 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs); 1694 if (nthreads > 0 && *threads_ptr == NULL) { 1695 return JVMTI_ERROR_OUT_OF_MEMORY; 1696 } 1697 if (ngroups > 0 && *groups_ptr == NULL) { 1698 return JVMTI_ERROR_OUT_OF_MEMORY; 1699 } 1700 1701 return JVMTI_ERROR_NONE; 1702 } /* end GetThreadGroupChildren */ 1703 1704 1705 // 1706 // Stack Frame functions 1707 // 1708 1709 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1710 // max_frame_count - pre-checked to be greater than or equal to 0 1711 // frame_buffer - pre-checked for NULL 1712 // count_ptr - pre-checked for NULL 1713 jvmtiError 1714 JvmtiEnv::GetStackTrace(jthread thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) { 1715 JavaThread* current_thread = JavaThread::current(); 1716 HandleMark hm(current_thread); 1717 1718 JvmtiVTMSTransitionDisabler disabler; 1719 ThreadsListHandle tlh(current_thread); 1720 1721 JavaThread* java_thread = NULL; 1722 oop thread_obj = NULL; 1723 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 1724 if (err != JVMTI_ERROR_NONE) { 1725 return err; 1726 } 1727 1728 if (java_lang_VirtualThread::is_instance(thread_obj)) { 1729 if (java_thread == NULL) { // Target virtual thread is unmounted. 1730 ResourceMark rm(current_thread); 1731 1732 VM_VirtualThreadGetStackTrace op(this, Handle(current_thread, thread_obj), 1733 start_depth, max_frame_count, 1734 frame_buffer, count_ptr); 1735 VMThread::execute(&op); 1736 return op.result(); 1737 } 1738 VirtualThreadGetStackTraceClosure op(this, Handle(current_thread, thread_obj), 1739 start_depth, max_frame_count, frame_buffer, count_ptr); 1740 Handshake::execute(&op, java_thread); 1741 return op.result(); 1742 } 1743 1744 // It is only safe to perform the direct operation on the current 1745 // thread. All other usage needs to use a direct handshake for safety. 1746 if (java_thread == JavaThread::current()) { 1747 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1748 } else { 1749 // Get stack trace with handshake. 1750 GetStackTraceClosure op(this, start_depth, max_frame_count, frame_buffer, count_ptr); 1751 Handshake::execute(&op, java_thread); 1752 err = op.result(); 1753 } 1754 1755 return err; 1756 } /* end GetStackTrace */ 1757 1758 1759 // max_frame_count - pre-checked to be greater than or equal to 0 1760 // stack_info_ptr - pre-checked for NULL 1761 // thread_count_ptr - pre-checked for NULL 1762 jvmtiError 1763 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) { 1764 jvmtiError err = JVMTI_ERROR_NONE; 1765 JavaThread* calling_thread = JavaThread::current(); 1766 1767 // JVMTI get stack traces at safepoint. 1768 VM_GetAllStackTraces op(this, calling_thread, max_frame_count); 1769 VMThread::execute(&op); 1770 *thread_count_ptr = op.final_thread_count(); 1771 *stack_info_ptr = op.stack_info(); 1772 err = op.result(); 1773 return err; 1774 } /* end GetAllStackTraces */ 1775 1776 1777 // thread_count - pre-checked to be greater than or equal to 0 1778 // thread_list - pre-checked for NULL 1779 // max_frame_count - pre-checked to be greater than or equal to 0 1780 // stack_info_ptr - pre-checked for NULL 1781 jvmtiError 1782 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) { 1783 jvmtiError err = JVMTI_ERROR_NONE; 1784 1785 if (thread_count == 1) { 1786 JvmtiVTMSTransitionDisabler disabler; 1787 1788 // Use direct handshake if we need to get only one stack trace. 1789 JavaThread *current_thread = JavaThread::current(); 1790 ThreadsListHandle tlh(current_thread); 1791 1792 jthread thread = thread_list[0]; 1793 JavaThread *java_thread; 1794 oop thread_obj = NULL; 1795 err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 1796 if (err != JVMTI_ERROR_NONE) { 1797 return err; 1798 } 1799 1800 if (java_lang_VirtualThread::is_instance(thread_obj) && java_thread == NULL) { 1801 // Target virtual thread is unmounted. 1802 ResourceMark rm(current_thread); 1803 MultipleStackTracesCollector collector(this, max_frame_count); 1804 collector.fill_frames(thread, java_thread, thread_obj); 1805 collector.allocate_and_fill_stacks(/* thread_count */ 1); 1806 *stack_info_ptr = collector.stack_info(); 1807 return collector.result(); 1808 } 1809 1810 GetSingleStackTraceClosure op(this, current_thread, thread, max_frame_count); 1811 Handshake::execute(&op, &tlh, java_thread); 1812 err = op.result(); 1813 if (err == JVMTI_ERROR_NONE) { 1814 *stack_info_ptr = op.stack_info(); 1815 } 1816 } else { 1817 // JVMTI get stack traces at safepoint. 1818 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count); 1819 VMThread::execute(&op); 1820 err = op.result(); 1821 if (err == JVMTI_ERROR_NONE) { 1822 *stack_info_ptr = op.stack_info(); 1823 } 1824 } 1825 return err; 1826 } /* end GetThreadListStackTraces */ 1827 1828 1829 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1830 // count_ptr - pre-checked for NULL 1831 jvmtiError 1832 JvmtiEnv::GetFrameCount(jthread thread, jint* count_ptr) { 1833 JavaThread* current_thread = JavaThread::current(); 1834 HandleMark hm(current_thread); 1835 1836 JvmtiVTMSTransitionDisabler disabler; 1837 ThreadsListHandle tlh(current_thread); 1838 1839 JavaThread* java_thread = NULL; 1840 oop thread_obj = NULL; 1841 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 1842 if (err != JVMTI_ERROR_NONE) { 1843 return err; 1844 } 1845 1846 if (java_lang_VirtualThread::is_instance(thread_obj)) { 1847 if (java_thread == NULL) { // Target virtual thread is unmounted. 1848 VM_VirtualThreadGetFrameCount op(this, Handle(current_thread, thread_obj), count_ptr); 1849 VMThread::execute(&op); 1850 return op.result(); 1851 } 1852 VirtualThreadGetFrameCountClosure op(this, Handle(current_thread, thread_obj), count_ptr); 1853 Handshake::execute(&op, java_thread); 1854 return op.result(); 1855 } 1856 1857 // It is only safe to perform the direct operation on the current 1858 // thread. All other usage needs to use a direct handshake for safety. 1859 if (java_thread == JavaThread::current()) { 1860 err = get_frame_count(java_thread, count_ptr); 1861 } else { 1862 // get java stack frame count with handshake. 1863 GetFrameCountClosure op(this, count_ptr); 1864 Handshake::execute(&op, java_thread); 1865 err = op.result(); 1866 } 1867 return err; 1868 } /* end GetFrameCount */ 1869 1870 1871 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1872 jvmtiError 1873 JvmtiEnv::PopFrame(jthread thread) { 1874 JavaThread* current_thread = JavaThread::current(); 1875 HandleMark hm(current_thread); 1876 1877 if (thread == NULL) { 1878 return JVMTI_ERROR_INVALID_THREAD; 1879 } 1880 JvmtiVTMSTransitionDisabler disabler; 1881 ThreadsListHandle tlh(current_thread); 1882 1883 JavaThread* java_thread = NULL; 1884 oop thread_obj = NULL; 1885 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 1886 1887 if (thread_obj != NULL && java_lang_VirtualThread::is_instance(thread_obj)) { 1888 // No support for virtual threads (yet). 1889 return JVMTI_ERROR_OPAQUE_FRAME; 1890 } 1891 if (err != JVMTI_ERROR_NONE) { 1892 return err; 1893 } 1894 1895 // retrieve or create the state 1896 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1897 if (state == NULL) { 1898 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1899 } 1900 1901 // Eagerly reallocate scalar replaced objects. 1902 EscapeBarrier eb(true, current_thread, java_thread); 1903 if (!eb.deoptimize_objects(1)) { 1904 // Reallocation of scalar replaced objects failed -> return with error 1905 return JVMTI_ERROR_OUT_OF_MEMORY; 1906 } 1907 1908 MutexLocker mu(JvmtiThreadState_lock); 1909 UpdateForPopTopFrameClosure op(state); 1910 if (java_thread == current_thread) { 1911 op.doit(java_thread, true /* self */); 1912 } else { 1913 Handshake::execute(&op, java_thread); 1914 } 1915 return op.result(); 1916 } /* end PopFrame */ 1917 1918 1919 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 1920 // depth - pre-checked as non-negative 1921 // method_ptr - pre-checked for NULL 1922 // location_ptr - pre-checked for NULL 1923 jvmtiError 1924 JvmtiEnv::GetFrameLocation(jthread thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) { 1925 JavaThread* current_thread = JavaThread::current(); 1926 HandleMark hm(current_thread); 1927 1928 JvmtiVTMSTransitionDisabler disabler; 1929 ThreadsListHandle tlh(current_thread); 1930 1931 JavaThread* java_thread = NULL; 1932 oop thread_obj = NULL; 1933 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 1934 if (err != JVMTI_ERROR_NONE) { 1935 return err; 1936 } 1937 1938 if (java_lang_VirtualThread::is_instance(thread_obj)) { 1939 if (java_thread == NULL) { // Target virtual thread is unmounted. 1940 err = get_frame_location(thread_obj, depth, method_ptr, location_ptr); 1941 return err; 1942 } 1943 VirtualThreadGetFrameLocationClosure op(this, Handle(current_thread, thread_obj), 1944 depth, method_ptr, location_ptr); 1945 Handshake::execute(&op, java_thread); 1946 return op.result(); 1947 } 1948 1949 // It is only safe to perform the direct operation on the current 1950 // thread. All other usage needs to use a direct handshake for safety. 1951 if (java_thread == JavaThread::current()) { 1952 err = get_frame_location(java_thread, depth, method_ptr, location_ptr); 1953 } else { 1954 // JVMTI get java stack frame location via direct handshake. 1955 GetFrameLocationClosure op(this, depth, method_ptr, location_ptr); 1956 Handshake::execute(&op, java_thread); 1957 err = op.result(); 1958 } 1959 return err; 1960 } /* end GetFrameLocation */ 1961 1962 1963 // Threads_lock NOT held, java_thread not protected by lock 1964 // depth - pre-checked as non-negative 1965 jvmtiError 1966 JvmtiEnv::NotifyFramePop(jthread thread, jint depth) { 1967 ResourceMark rm; 1968 JvmtiVTMSTransitionDisabler disabler; 1969 ThreadsListHandle tlh; 1970 1971 JavaThread* java_thread = NULL; 1972 oop thread_obj = NULL; 1973 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 1974 if (err != JVMTI_ERROR_NONE) { 1975 return err; 1976 } 1977 1978 JavaThread* current = JavaThread::current(); 1979 HandleMark hm(current); 1980 Handle thread_handle(current, thread_obj); 1981 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread, thread_handle); 1982 if (state == NULL) { 1983 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1984 } 1985 1986 if (java_lang_VirtualThread::is_instance(thread_handle())) { 1987 VirtualThreadSetFramePopClosure op(this, thread_handle, state, depth); 1988 MutexLocker mu(current, JvmtiThreadState_lock); 1989 if (java_thread == NULL || java_thread == current) { 1990 // Target virtual thread is unmounted or current. 1991 op.doit(java_thread, true /* self */); 1992 } else { 1993 Handshake::execute(&op, java_thread); 1994 } 1995 return op.result(); 1996 } 1997 1998 SetFramePopClosure op(this, state, depth); 1999 MutexLocker mu(current, JvmtiThreadState_lock); 2000 if (java_thread == current) { 2001 op.doit(java_thread, true /* self */); 2002 } else { 2003 Handshake::execute(&op, java_thread); 2004 } 2005 return op.result(); 2006 } /* end NotifyFramePop */ 2007 2008 2009 // 2010 // Force Early Return functions 2011 // 2012 2013 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2014 jvmtiError 2015 JvmtiEnv::ForceEarlyReturnObject(jthread thread, jobject value) { 2016 jvalue val; 2017 val.l = value; 2018 return force_early_return(thread, val, atos); 2019 } /* end ForceEarlyReturnObject */ 2020 2021 2022 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2023 jvmtiError 2024 JvmtiEnv::ForceEarlyReturnInt(jthread thread, jint value) { 2025 jvalue val; 2026 val.i = value; 2027 return force_early_return(thread, val, itos); 2028 } /* end ForceEarlyReturnInt */ 2029 2030 2031 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2032 jvmtiError 2033 JvmtiEnv::ForceEarlyReturnLong(jthread thread, jlong value) { 2034 jvalue val; 2035 val.j = value; 2036 return force_early_return(thread, val, ltos); 2037 } /* end ForceEarlyReturnLong */ 2038 2039 2040 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2041 jvmtiError 2042 JvmtiEnv::ForceEarlyReturnFloat(jthread thread, jfloat value) { 2043 jvalue val; 2044 val.f = value; 2045 return force_early_return(thread, val, ftos); 2046 } /* end ForceEarlyReturnFloat */ 2047 2048 2049 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2050 jvmtiError 2051 JvmtiEnv::ForceEarlyReturnDouble(jthread thread, jdouble value) { 2052 jvalue val; 2053 val.d = value; 2054 return force_early_return(thread, val, dtos); 2055 } /* end ForceEarlyReturnDouble */ 2056 2057 2058 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2059 jvmtiError 2060 JvmtiEnv::ForceEarlyReturnVoid(jthread thread) { 2061 jvalue val; 2062 val.j = 0L; 2063 return force_early_return(thread, val, vtos); 2064 } /* end ForceEarlyReturnVoid */ 2065 2066 2067 // 2068 // Heap functions 2069 // 2070 2071 // klass - NULL is a valid value, must be checked 2072 // initial_object - NULL is a valid value, must be checked 2073 // callbacks - pre-checked for NULL 2074 // user_data - NULL is a valid value, must be checked 2075 jvmtiError 2076 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 2077 // check klass if provided 2078 Klass* k = NULL; 2079 if (klass != NULL) { 2080 oop k_mirror = JNIHandles::resolve_external_guard(klass); 2081 if (k_mirror == NULL) { 2082 return JVMTI_ERROR_INVALID_CLASS; 2083 } 2084 if (java_lang_Class::is_primitive(k_mirror)) { 2085 return JVMTI_ERROR_NONE; 2086 } 2087 k = java_lang_Class::as_Klass(k_mirror); 2088 if (klass == NULL) { 2089 return JVMTI_ERROR_INVALID_CLASS; 2090 } 2091 } 2092 2093 if (initial_object != NULL) { 2094 oop init_obj = JNIHandles::resolve_external_guard(initial_object); 2095 if (init_obj == NULL) { 2096 return JVMTI_ERROR_INVALID_OBJECT; 2097 } 2098 } 2099 2100 Thread *thread = Thread::current(); 2101 HandleMark hm(thread); 2102 2103 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2104 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data); 2105 return JVMTI_ERROR_NONE; 2106 } /* end FollowReferences */ 2107 2108 2109 // klass - NULL is a valid value, must be checked 2110 // callbacks - pre-checked for NULL 2111 // user_data - NULL is a valid value, must be checked 2112 jvmtiError 2113 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 2114 // check klass if provided 2115 Klass* k = NULL; 2116 if (klass != NULL) { 2117 oop k_mirror = JNIHandles::resolve_external_guard(klass); 2118 if (k_mirror == NULL) { 2119 return JVMTI_ERROR_INVALID_CLASS; 2120 } 2121 if (java_lang_Class::is_primitive(k_mirror)) { 2122 return JVMTI_ERROR_NONE; 2123 } 2124 k = java_lang_Class::as_Klass(k_mirror); 2125 if (k == NULL) { 2126 return JVMTI_ERROR_INVALID_CLASS; 2127 } 2128 } 2129 2130 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2131 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data); 2132 return JVMTI_ERROR_NONE; 2133 } /* end IterateThroughHeap */ 2134 2135 2136 // tag_ptr - pre-checked for NULL 2137 jvmtiError 2138 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) { 2139 oop o = JNIHandles::resolve_external_guard(object); 2140 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 2141 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object); 2142 return JVMTI_ERROR_NONE; 2143 } /* end GetTag */ 2144 2145 2146 jvmtiError 2147 JvmtiEnv::SetTag(jobject object, jlong tag) { 2148 oop o = JNIHandles::resolve_external_guard(object); 2149 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 2150 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag); 2151 return JVMTI_ERROR_NONE; 2152 } /* end SetTag */ 2153 2154 2155 // tag_count - pre-checked to be greater than or equal to 0 2156 // tags - pre-checked for NULL 2157 // count_ptr - pre-checked for NULL 2158 // object_result_ptr - NULL is a valid value, must be checked 2159 // tag_result_ptr - NULL is a valid value, must be checked 2160 jvmtiError 2161 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { 2162 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2163 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr); 2164 } /* end GetObjectsWithTags */ 2165 2166 2167 jvmtiError 2168 JvmtiEnv::ForceGarbageCollection() { 2169 Universe::heap()->collect(GCCause::_jvmti_force_gc); 2170 return JVMTI_ERROR_NONE; 2171 } /* end ForceGarbageCollection */ 2172 2173 2174 // 2175 // Heap (1.0) functions 2176 // 2177 2178 // object_reference_callback - pre-checked for NULL 2179 // user_data - NULL is a valid value, must be checked 2180 jvmtiError 2181 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) { 2182 oop o = JNIHandles::resolve_external_guard(object); 2183 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 2184 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data); 2185 return JVMTI_ERROR_NONE; 2186 } /* end IterateOverObjectsReachableFromObject */ 2187 2188 2189 // heap_root_callback - NULL is a valid value, must be checked 2190 // stack_ref_callback - NULL is a valid value, must be checked 2191 // object_ref_callback - NULL is a valid value, must be checked 2192 // user_data - NULL is a valid value, must be checked 2193 jvmtiError 2194 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) { 2195 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2196 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data); 2197 return JVMTI_ERROR_NONE; 2198 } /* end IterateOverReachableObjects */ 2199 2200 2201 // heap_object_callback - pre-checked for NULL 2202 // user_data - NULL is a valid value, must be checked 2203 jvmtiError 2204 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 2205 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2206 Thread *thread = Thread::current(); 2207 HandleMark hm(thread); 2208 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data); 2209 return JVMTI_ERROR_NONE; 2210 } /* end IterateOverHeap */ 2211 2212 2213 // k_mirror - may be primitive, this must be checked 2214 // heap_object_callback - pre-checked for NULL 2215 // user_data - NULL is a valid value, must be checked 2216 jvmtiError 2217 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 2218 if (java_lang_Class::is_primitive(k_mirror)) { 2219 // DO PRIMITIVE CLASS PROCESSING 2220 return JVMTI_ERROR_NONE; 2221 } 2222 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2223 if (klass == NULL) { 2224 return JVMTI_ERROR_INVALID_CLASS; 2225 } 2226 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2227 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data); 2228 return JVMTI_ERROR_NONE; 2229 } /* end IterateOverInstancesOfClass */ 2230 2231 2232 // 2233 // Local Variable functions 2234 // 2235 2236 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2237 // depth - pre-checked as non-negative 2238 // value_ptr - pre-checked for NULL 2239 jvmtiError 2240 JvmtiEnv::GetLocalObject(jthread thread, jint depth, jint slot, jobject* value_ptr) { 2241 JavaThread* current_thread = JavaThread::current(); 2242 // rm object is created to clean up the javaVFrame created in 2243 // doit_prologue(), but after doit() is finished with it. 2244 ResourceMark rm(current_thread); 2245 HandleMark hm(current_thread); 2246 JvmtiVTMSTransitionDisabler disabler; 2247 ThreadsListHandle tlh(current_thread); 2248 2249 JavaThread* java_thread = NULL; 2250 oop thread_obj = NULL; 2251 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2252 if (err != JVMTI_ERROR_NONE) { 2253 return err; 2254 } 2255 bool self = is_JavaThread_current(java_thread, thread_obj); 2256 2257 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2258 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2259 current_thread, depth, slot, self); 2260 VMThread::execute(&op); 2261 err = op.result(); 2262 if (err == JVMTI_ERROR_NONE) { 2263 *value_ptr = op.value().l; 2264 } 2265 } else { 2266 // Support for ordinary threads 2267 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot, self); 2268 VMThread::execute(&op); 2269 err = op.result(); 2270 if (err == JVMTI_ERROR_NONE) { 2271 *value_ptr = op.value().l; 2272 } 2273 } 2274 return err; 2275 } /* end GetLocalObject */ 2276 2277 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2278 // depth - pre-checked as non-negative 2279 // value - pre-checked for NULL 2280 jvmtiError 2281 JvmtiEnv::GetLocalInstance(jthread thread, jint depth, jobject* value_ptr){ 2282 JavaThread* current_thread = JavaThread::current(); 2283 // rm object is created to clean up the javaVFrame created in 2284 // doit_prologue(), but after doit() is finished with it. 2285 ResourceMark rm(current_thread); 2286 HandleMark hm(current_thread); 2287 JvmtiVTMSTransitionDisabler disabler; 2288 ThreadsListHandle tlh(current_thread); 2289 2290 JavaThread* java_thread = NULL; 2291 oop thread_obj = NULL; 2292 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2293 if (err != JVMTI_ERROR_NONE) { 2294 return err; 2295 } 2296 bool self = is_JavaThread_current(java_thread, thread_obj); 2297 2298 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2299 VM_VirtualThreadGetReceiver op(this, Handle(current_thread, thread_obj), 2300 current_thread, depth, self); 2301 VMThread::execute(&op); 2302 err = op.result(); 2303 if (err == JVMTI_ERROR_NONE) { 2304 *value_ptr = op.value().l; 2305 } 2306 } else { 2307 // Support for ordinary threads 2308 VM_GetReceiver op(java_thread, current_thread, depth, self); 2309 VMThread::execute(&op); 2310 err = op.result(); 2311 if (err == JVMTI_ERROR_NONE) { 2312 *value_ptr = op.value().l; 2313 } 2314 } 2315 return err; 2316 } /* end GetLocalInstance */ 2317 2318 2319 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2320 // depth - pre-checked as non-negative 2321 // value_ptr - pre-checked for NULL 2322 jvmtiError 2323 JvmtiEnv::GetLocalInt(jthread thread, jint depth, jint slot, jint* value_ptr) { 2324 JavaThread* current_thread = JavaThread::current(); 2325 // rm object is created to clean up the javaVFrame created in 2326 // doit_prologue(), but after doit() is finished with it. 2327 ResourceMark rm(current_thread); 2328 HandleMark hm(current_thread); 2329 JvmtiVTMSTransitionDisabler disabler; 2330 ThreadsListHandle tlh(current_thread); 2331 2332 JavaThread* java_thread = NULL; 2333 oop thread_obj = NULL; 2334 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2335 if (err != JVMTI_ERROR_NONE) { 2336 return err; 2337 } 2338 bool self = is_JavaThread_current(java_thread, thread_obj); 2339 2340 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2341 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2342 depth, slot, T_INT, self); 2343 VMThread::execute(&op); 2344 err = op.result(); 2345 if (err == JVMTI_ERROR_NONE) { 2346 *value_ptr = op.value().i; 2347 } 2348 } else { 2349 // Support for ordinary threads 2350 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, self); 2351 VMThread::execute(&op); 2352 err = op.result(); 2353 if (err == JVMTI_ERROR_NONE) { 2354 *value_ptr = op.value().i; 2355 } 2356 } 2357 return err; 2358 } /* end GetLocalInt */ 2359 2360 2361 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2362 // depth - pre-checked as non-negative 2363 // value_ptr - pre-checked for NULL 2364 jvmtiError 2365 JvmtiEnv::GetLocalLong(jthread thread, jint depth, jint slot, jlong* value_ptr) { 2366 JavaThread* current_thread = JavaThread::current(); 2367 // rm object is created to clean up the javaVFrame created in 2368 // doit_prologue(), but after doit() is finished with it. 2369 ResourceMark rm(current_thread); 2370 HandleMark hm(current_thread); 2371 JvmtiVTMSTransitionDisabler disabler; 2372 ThreadsListHandle tlh(current_thread); 2373 2374 JavaThread* java_thread = NULL; 2375 oop thread_obj = NULL; 2376 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2377 if (err != JVMTI_ERROR_NONE) { 2378 return err; 2379 } 2380 bool self = is_JavaThread_current(java_thread, thread_obj); 2381 2382 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2383 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2384 depth, slot, T_LONG, self); 2385 VMThread::execute(&op); 2386 err = op.result(); 2387 if (err == JVMTI_ERROR_NONE) { 2388 *value_ptr = op.value().j; 2389 } 2390 } else { 2391 // Support for ordinary threads 2392 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, self); 2393 VMThread::execute(&op); 2394 err = op.result(); 2395 if (err == JVMTI_ERROR_NONE) { 2396 *value_ptr = op.value().j; 2397 } 2398 } 2399 return err; 2400 } /* end GetLocalLong */ 2401 2402 2403 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2404 // depth - pre-checked as non-negative 2405 // value_ptr - pre-checked for NULL 2406 jvmtiError 2407 JvmtiEnv::GetLocalFloat(jthread thread, jint depth, jint slot, jfloat* value_ptr) { 2408 JavaThread* current_thread = JavaThread::current(); 2409 // rm object is created to clean up the javaVFrame created in 2410 // doit_prologue(), but after doit() is finished with it. 2411 ResourceMark rm(current_thread); 2412 HandleMark hm(current_thread); 2413 JvmtiVTMSTransitionDisabler disabler; 2414 ThreadsListHandle tlh(current_thread); 2415 2416 JavaThread* java_thread = NULL; 2417 oop thread_obj = NULL; 2418 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2419 if (err != JVMTI_ERROR_NONE) { 2420 return err; 2421 } 2422 bool self = is_JavaThread_current(java_thread, thread_obj); 2423 2424 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2425 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2426 depth, slot, T_FLOAT, self); 2427 VMThread::execute(&op); 2428 err = op.result(); 2429 if (err == JVMTI_ERROR_NONE) { 2430 *value_ptr = op.value().f; 2431 } 2432 } else { 2433 // Support for ordinary threads 2434 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, self); 2435 VMThread::execute(&op); 2436 err = op.result(); 2437 if (err == JVMTI_ERROR_NONE) { 2438 *value_ptr = op.value().f; 2439 } 2440 } 2441 return err; 2442 } /* end GetLocalFloat */ 2443 2444 2445 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2446 // depth - pre-checked as non-negative 2447 // value_ptr - pre-checked for NULL 2448 jvmtiError 2449 JvmtiEnv::GetLocalDouble(jthread thread, jint depth, jint slot, jdouble* value_ptr) { 2450 JavaThread* current_thread = JavaThread::current(); 2451 // rm object is created to clean up the javaVFrame created in 2452 // doit_prologue(), but after doit() is finished with it. 2453 ResourceMark rm(current_thread); 2454 HandleMark hm(current_thread); 2455 JvmtiVTMSTransitionDisabler disabler; 2456 ThreadsListHandle tlh(current_thread); 2457 2458 JavaThread* java_thread = NULL; 2459 oop thread_obj = NULL; 2460 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2461 if (err != JVMTI_ERROR_NONE) { 2462 return err; 2463 } 2464 bool self = is_JavaThread_current(java_thread, thread_obj); 2465 2466 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2467 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2468 depth, slot, T_DOUBLE, self); 2469 VMThread::execute(&op); 2470 err = op.result(); 2471 if (err == JVMTI_ERROR_NONE) { 2472 *value_ptr = op.value().d; 2473 } 2474 } else { 2475 // Support for ordinary threads 2476 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, self); 2477 VMThread::execute(&op); 2478 err = op.result(); 2479 if (err == JVMTI_ERROR_NONE) { 2480 *value_ptr = op.value().d; 2481 } 2482 } 2483 return err; 2484 } /* end GetLocalDouble */ 2485 2486 2487 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2488 // depth - pre-checked as non-negative 2489 jvmtiError 2490 JvmtiEnv::SetLocalObject(jthread thread, jint depth, jint slot, jobject value) { 2491 JavaThread* current_thread = JavaThread::current(); 2492 // rm object is created to clean up the javaVFrame created in 2493 // doit_prologue(), but after doit() is finished with it. 2494 ResourceMark rm(current_thread); 2495 HandleMark hm(current_thread); 2496 JvmtiVTMSTransitionDisabler disabler; 2497 ThreadsListHandle tlh(current_thread); 2498 2499 JavaThread* java_thread = NULL; 2500 oop thread_obj = NULL; 2501 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2502 if (err != JVMTI_ERROR_NONE) { 2503 return err; 2504 } 2505 bool self = is_JavaThread_current(java_thread, thread_obj); 2506 jvalue val; 2507 val.l = value; 2508 2509 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2510 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2511 depth, slot, T_OBJECT, val, self); 2512 VMThread::execute(&op); 2513 err = op.result(); 2514 } else { 2515 // Support for ordinary threads 2516 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val, self); 2517 VMThread::execute(&op); 2518 err = op.result(); 2519 } 2520 return err; 2521 } /* end SetLocalObject */ 2522 2523 2524 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2525 // depth - pre-checked as non-negative 2526 jvmtiError 2527 JvmtiEnv::SetLocalInt(jthread thread, jint depth, jint slot, jint value) { 2528 JavaThread* current_thread = JavaThread::current(); 2529 // rm object is created to clean up the javaVFrame created in 2530 // doit_prologue(), but after doit() is finished with it. 2531 ResourceMark rm(current_thread); 2532 HandleMark hm(current_thread); 2533 JvmtiVTMSTransitionDisabler disabler; 2534 ThreadsListHandle tlh(current_thread); 2535 2536 JavaThread* java_thread = NULL; 2537 oop thread_obj = NULL; 2538 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2539 if (err != JVMTI_ERROR_NONE) { 2540 return err; 2541 } 2542 bool self = is_JavaThread_current(java_thread, thread_obj); 2543 jvalue val; 2544 val.i = value; 2545 2546 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2547 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2548 depth, slot, T_INT, val, self); 2549 VMThread::execute(&op); 2550 err = op.result(); 2551 } else { 2552 // Support for ordinary threads 2553 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val, self); 2554 VMThread::execute(&op); 2555 err = op.result(); 2556 } 2557 return err; 2558 } /* end SetLocalInt */ 2559 2560 2561 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2562 // depth - pre-checked as non-negative 2563 jvmtiError 2564 JvmtiEnv::SetLocalLong(jthread thread, jint depth, jint slot, jlong value) { 2565 JavaThread* current_thread = JavaThread::current(); 2566 // rm object is created to clean up the javaVFrame created in 2567 // doit_prologue(), but after doit() is finished with it. 2568 ResourceMark rm(current_thread); 2569 HandleMark hm(current_thread); 2570 JvmtiVTMSTransitionDisabler disabler; 2571 ThreadsListHandle tlh(current_thread); 2572 2573 JavaThread* java_thread = NULL; 2574 oop thread_obj = NULL; 2575 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2576 if (err != JVMTI_ERROR_NONE) { 2577 return err; 2578 } 2579 bool self = is_JavaThread_current(java_thread, thread_obj); 2580 jvalue val; 2581 val.j = value; 2582 2583 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2584 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2585 depth, slot, T_LONG, val, self); 2586 VMThread::execute(&op); 2587 err = op.result(); 2588 } else { 2589 // Support for ordinary threads 2590 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val, self); 2591 VMThread::execute(&op); 2592 err = op.result(); 2593 } 2594 return err; 2595 } /* end SetLocalLong */ 2596 2597 2598 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2599 // depth - pre-checked as non-negative 2600 jvmtiError 2601 JvmtiEnv::SetLocalFloat(jthread thread, jint depth, jint slot, jfloat value) { 2602 JavaThread* current_thread = JavaThread::current(); 2603 // rm object is created to clean up the javaVFrame created in 2604 // doit_prologue(), but after doit() is finished with it. 2605 ResourceMark rm(current_thread); 2606 HandleMark hm(current_thread); 2607 JvmtiVTMSTransitionDisabler disabler; 2608 ThreadsListHandle tlh(current_thread); 2609 2610 JavaThread* java_thread = NULL; 2611 oop thread_obj = NULL; 2612 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2613 if (err != JVMTI_ERROR_NONE) { 2614 return err; 2615 } 2616 bool self = is_JavaThread_current(java_thread, thread_obj); 2617 jvalue val; 2618 val.f = value; 2619 2620 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2621 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2622 depth, slot, T_FLOAT, val, self); 2623 VMThread::execute(&op); 2624 err = op.result(); 2625 } else { 2626 // Support for ordinary threads 2627 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val, self); 2628 VMThread::execute(&op); 2629 err = op.result(); 2630 } 2631 return err; 2632 } /* end SetLocalFloat */ 2633 2634 2635 // thread - NOT protected by ThreadsListHandle and NOT pre-checked 2636 // depth - pre-checked as non-negative 2637 jvmtiError 2638 JvmtiEnv::SetLocalDouble(jthread thread, jint depth, jint slot, jdouble value) { 2639 JavaThread* current_thread = JavaThread::current(); 2640 // rm object is created to clean up the javaVFrame created in 2641 // doit_prologue(), but after doit() is finished with it. 2642 ResourceMark rm(current_thread); 2643 HandleMark hm(current_thread); 2644 JvmtiVTMSTransitionDisabler disabler; 2645 ThreadsListHandle tlh(current_thread); 2646 2647 JavaThread* java_thread = NULL; 2648 oop thread_obj = NULL; 2649 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_obj); 2650 if (err != JVMTI_ERROR_NONE) { 2651 return err; 2652 } 2653 bool self = is_JavaThread_current(java_thread, thread_obj); 2654 jvalue val; 2655 val.d = value; 2656 2657 if (java_lang_VirtualThread::is_instance(thread_obj)) { 2658 VM_VirtualThreadGetOrSetLocal op(this, Handle(current_thread, thread_obj), 2659 depth, slot, T_DOUBLE, val, self); 2660 VMThread::execute(&op); 2661 err = op.result(); 2662 } else { 2663 // Support for ordinary threads 2664 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val, self); 2665 VMThread::execute(&op); 2666 err = op.result(); 2667 } 2668 return err; 2669 } /* end SetLocalDouble */ 2670 2671 2672 // 2673 // Breakpoint functions 2674 // 2675 2676 // method - pre-checked for validity, but may be NULL meaning obsolete method 2677 jvmtiError 2678 JvmtiEnv::SetBreakpoint(Method* method, jlocation location) { 2679 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 2680 if (location < 0) { // simple invalid location check first 2681 return JVMTI_ERROR_INVALID_LOCATION; 2682 } 2683 // verify that the breakpoint is not past the end of the method 2684 if (location >= (jlocation) method->code_size()) { 2685 return JVMTI_ERROR_INVALID_LOCATION; 2686 } 2687 2688 ResourceMark rm; 2689 JvmtiBreakpoint bp(method, location); 2690 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2691 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE) 2692 return JVMTI_ERROR_DUPLICATE; 2693 2694 if (TraceJVMTICalls) { 2695 jvmti_breakpoints.print(); 2696 } 2697 2698 return JVMTI_ERROR_NONE; 2699 } /* end SetBreakpoint */ 2700 2701 2702 // method - pre-checked for validity, but may be NULL meaning obsolete method 2703 jvmtiError 2704 JvmtiEnv::ClearBreakpoint(Method* method, jlocation location) { 2705 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 2706 2707 if (location < 0) { // simple invalid location check first 2708 return JVMTI_ERROR_INVALID_LOCATION; 2709 } 2710 2711 // verify that the breakpoint is not past the end of the method 2712 if (location >= (jlocation) method->code_size()) { 2713 return JVMTI_ERROR_INVALID_LOCATION; 2714 } 2715 2716 JvmtiBreakpoint bp(method, location); 2717 2718 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2719 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND) 2720 return JVMTI_ERROR_NOT_FOUND; 2721 2722 if (TraceJVMTICalls) { 2723 jvmti_breakpoints.print(); 2724 } 2725 2726 return JVMTI_ERROR_NONE; 2727 } /* end ClearBreakpoint */ 2728 2729 2730 // 2731 // Watched Field functions 2732 // 2733 2734 jvmtiError 2735 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2736 // make sure we haven't set this watch before 2737 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE; 2738 fdesc_ptr->set_is_field_access_watched(true); 2739 2740 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true); 2741 2742 return JVMTI_ERROR_NONE; 2743 } /* end SetFieldAccessWatch */ 2744 2745 2746 jvmtiError 2747 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2748 // make sure we have a watch to clear 2749 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND; 2750 fdesc_ptr->set_is_field_access_watched(false); 2751 2752 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false); 2753 2754 return JVMTI_ERROR_NONE; 2755 } /* end ClearFieldAccessWatch */ 2756 2757 2758 jvmtiError 2759 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2760 // make sure we haven't set this watch before 2761 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE; 2762 fdesc_ptr->set_is_field_modification_watched(true); 2763 2764 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true); 2765 2766 return JVMTI_ERROR_NONE; 2767 } /* end SetFieldModificationWatch */ 2768 2769 2770 jvmtiError 2771 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2772 // make sure we have a watch to clear 2773 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND; 2774 fdesc_ptr->set_is_field_modification_watched(false); 2775 2776 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false); 2777 2778 return JVMTI_ERROR_NONE; 2779 } /* end ClearFieldModificationWatch */ 2780 2781 // 2782 // Class functions 2783 // 2784 2785 2786 // k_mirror - may be primitive, this must be checked 2787 // signature_ptr - NULL is a valid value, must be checked 2788 // generic_ptr - NULL is a valid value, must be checked 2789 jvmtiError 2790 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) { 2791 ResourceMark rm; 2792 bool isPrimitive = java_lang_Class::is_primitive(k_mirror); 2793 Klass* k = NULL; 2794 if (!isPrimitive) { 2795 k = java_lang_Class::as_Klass(k_mirror); 2796 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2797 } 2798 if (signature_ptr != NULL) { 2799 char* result = NULL; 2800 if (isPrimitive) { 2801 char tchar = type2char(java_lang_Class::primitive_type(k_mirror)); 2802 result = (char*) jvmtiMalloc(2); 2803 result[0] = tchar; 2804 result[1] = '\0'; 2805 } else { 2806 const char* class_sig = k->signature_name(); 2807 result = (char *) jvmtiMalloc(strlen(class_sig)+1); 2808 strcpy(result, class_sig); 2809 } 2810 *signature_ptr = result; 2811 } 2812 if (generic_ptr != NULL) { 2813 *generic_ptr = NULL; 2814 if (!isPrimitive && k->is_instance_klass()) { 2815 Symbol* soo = InstanceKlass::cast(k)->generic_signature(); 2816 if (soo != NULL) { 2817 const char *gen_sig = soo->as_C_string(); 2818 if (gen_sig != NULL) { 2819 char* gen_result; 2820 jvmtiError err = allocate(strlen(gen_sig) + 1, 2821 (unsigned char **)&gen_result); 2822 if (err != JVMTI_ERROR_NONE) { 2823 return err; 2824 } 2825 strcpy(gen_result, gen_sig); 2826 *generic_ptr = gen_result; 2827 } 2828 } 2829 } 2830 } 2831 return JVMTI_ERROR_NONE; 2832 } /* end GetClassSignature */ 2833 2834 2835 // k_mirror - may be primitive, this must be checked 2836 // status_ptr - pre-checked for NULL 2837 jvmtiError 2838 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) { 2839 jint result = 0; 2840 if (java_lang_Class::is_primitive(k_mirror)) { 2841 result |= JVMTI_CLASS_STATUS_PRIMITIVE; 2842 } else { 2843 Klass* k = java_lang_Class::as_Klass(k_mirror); 2844 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2845 result = k->jvmti_class_status(); 2846 } 2847 *status_ptr = result; 2848 2849 return JVMTI_ERROR_NONE; 2850 } /* end GetClassStatus */ 2851 2852 2853 // k_mirror - may be primitive, this must be checked 2854 // source_name_ptr - pre-checked for NULL 2855 jvmtiError 2856 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) { 2857 if (java_lang_Class::is_primitive(k_mirror)) { 2858 return JVMTI_ERROR_ABSENT_INFORMATION; 2859 } 2860 Klass* k_klass = java_lang_Class::as_Klass(k_mirror); 2861 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS); 2862 2863 if (!k_klass->is_instance_klass()) { 2864 return JVMTI_ERROR_ABSENT_INFORMATION; 2865 } 2866 2867 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name(); 2868 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION); 2869 { 2870 JavaThread* current_thread = JavaThread::current(); 2871 ResourceMark rm(current_thread); 2872 const char* sfncp = (const char*) sfnOop->as_C_string(); 2873 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1); 2874 strcpy(*source_name_ptr, sfncp); 2875 } 2876 2877 return JVMTI_ERROR_NONE; 2878 } /* end GetSourceFileName */ 2879 2880 2881 // k_mirror - may be primitive, this must be checked 2882 // modifiers_ptr - pre-checked for NULL 2883 jvmtiError 2884 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) { 2885 JavaThread* current_thread = JavaThread::current(); 2886 jint result = 0; 2887 if (!java_lang_Class::is_primitive(k_mirror)) { 2888 Klass* k = java_lang_Class::as_Klass(k_mirror); 2889 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2890 result = k->compute_modifier_flags(); 2891 2892 // Reset the deleted ACC_SUPER bit (deleted in compute_modifier_flags()). 2893 // if (k->is_super()) { 2894 // result |= JVM_ACC_SUPER; 2895 // } 2896 } else { 2897 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 2898 } 2899 *modifiers_ptr = result; 2900 2901 return JVMTI_ERROR_NONE; 2902 } /* end GetClassModifiers */ 2903 2904 2905 // k_mirror - may be primitive, this must be checked 2906 // method_count_ptr - pre-checked for NULL 2907 // methods_ptr - pre-checked for NULL 2908 jvmtiError 2909 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) { 2910 JavaThread* current_thread = JavaThread::current(); 2911 HandleMark hm(current_thread); 2912 2913 if (java_lang_Class::is_primitive(k_mirror)) { 2914 *method_count_ptr = 0; 2915 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2916 return JVMTI_ERROR_NONE; 2917 } 2918 Klass* k = java_lang_Class::as_Klass(k_mirror); 2919 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2920 2921 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2922 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2923 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2924 } 2925 2926 if (!k->is_instance_klass()) { 2927 *method_count_ptr = 0; 2928 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2929 return JVMTI_ERROR_NONE; 2930 } 2931 InstanceKlass* ik = InstanceKlass::cast(k); 2932 // Allocate the result and fill it in 2933 int result_length = ik->methods()->length(); 2934 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID)); 2935 int index; 2936 bool jmethodids_found = true; 2937 int skipped = 0; // skip overpass methods 2938 2939 for (index = 0; index < result_length; index++) { 2940 Method* m = ik->methods()->at(index); 2941 // Depending on can_maintain_original_method_order capability use the original 2942 // method ordering indices stored in the class, so we can emit jmethodIDs in 2943 // the order they appeared in the class file or just copy in current order. 2944 int result_index = JvmtiExport::can_maintain_original_method_order() ? ik->method_ordering()->at(index) : index; 2945 assert(result_index >= 0 && result_index < result_length, "invalid original method index"); 2946 if (m->is_overpass()) { 2947 result_list[result_index] = NULL; 2948 skipped++; 2949 continue; 2950 } 2951 jmethodID id; 2952 if (jmethodids_found) { 2953 id = m->find_jmethod_id_or_null(); 2954 if (id == NULL) { 2955 // If we find an uninitialized value, make sure there is 2956 // enough space for all the uninitialized values we might 2957 // find. 2958 ik->ensure_space_for_methodids(index); 2959 jmethodids_found = false; 2960 id = m->jmethod_id(); 2961 } 2962 } else { 2963 id = m->jmethod_id(); 2964 } 2965 result_list[result_index] = id; 2966 } 2967 2968 // Fill in return value. 2969 if (skipped > 0) { 2970 // copy results skipping NULL methodIDs 2971 *methods_ptr = (jmethodID*)jvmtiMalloc((result_length - skipped) * sizeof(jmethodID)); 2972 *method_count_ptr = result_length - skipped; 2973 for (index = 0, skipped = 0; index < result_length; index++) { 2974 if (result_list[index] == NULL) { 2975 skipped++; 2976 } else { 2977 (*methods_ptr)[index - skipped] = result_list[index]; 2978 } 2979 } 2980 deallocate((unsigned char *)result_list); 2981 } else { 2982 *method_count_ptr = result_length; 2983 *methods_ptr = result_list; 2984 } 2985 2986 return JVMTI_ERROR_NONE; 2987 } /* end GetClassMethods */ 2988 2989 2990 // k_mirror - may be primitive, this must be checked 2991 // field_count_ptr - pre-checked for NULL 2992 // fields_ptr - pre-checked for NULL 2993 jvmtiError 2994 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) { 2995 if (java_lang_Class::is_primitive(k_mirror)) { 2996 *field_count_ptr = 0; 2997 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2998 return JVMTI_ERROR_NONE; 2999 } 3000 JavaThread* current_thread = JavaThread::current(); 3001 HandleMark hm(current_thread); 3002 Klass* k = java_lang_Class::as_Klass(k_mirror); 3003 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 3004 3005 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 3006 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 3007 return JVMTI_ERROR_CLASS_NOT_PREPARED; 3008 } 3009 3010 if (!k->is_instance_klass()) { 3011 *field_count_ptr = 0; 3012 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 3013 return JVMTI_ERROR_NONE; 3014 } 3015 3016 3017 InstanceKlass* ik = InstanceKlass::cast(k); 3018 3019 int result_count = 0; 3020 // First, count the fields. 3021 FilteredFieldStream flds(ik, true, true); 3022 result_count = flds.field_count(); 3023 3024 // Allocate the result and fill it in 3025 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID)); 3026 // The JVMTI spec requires fields in the order they occur in the class file, 3027 // this is the reverse order of what FieldStream hands out. 3028 int id_index = (result_count - 1); 3029 3030 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) { 3031 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID( 3032 ik, src_st.offset(), 3033 src_st.access_flags().is_static(), 3034 src_st.field_descriptor().is_inlined()); 3035 } 3036 assert(id_index == -1, "just checking"); 3037 // Fill in the results 3038 *field_count_ptr = result_count; 3039 *fields_ptr = result_list; 3040 3041 return JVMTI_ERROR_NONE; 3042 } /* end GetClassFields */ 3043 3044 3045 // k_mirror - may be primitive, this must be checked 3046 // interface_count_ptr - pre-checked for NULL 3047 // interfaces_ptr - pre-checked for NULL 3048 jvmtiError 3049 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) { 3050 { 3051 if (java_lang_Class::is_primitive(k_mirror)) { 3052 *interface_count_ptr = 0; 3053 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 3054 return JVMTI_ERROR_NONE; 3055 } 3056 JavaThread* current_thread = JavaThread::current(); 3057 HandleMark hm(current_thread); 3058 Klass* k = java_lang_Class::as_Klass(k_mirror); 3059 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 3060 3061 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 3062 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) 3063 return JVMTI_ERROR_CLASS_NOT_PREPARED; 3064 3065 if (!k->is_instance_klass()) { 3066 *interface_count_ptr = 0; 3067 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 3068 return JVMTI_ERROR_NONE; 3069 } 3070 3071 InstanceKlass* ik = InstanceKlass::cast(k); 3072 Array<InstanceKlass*>* interface_list = ik->local_interfaces(); 3073 int result_length = (interface_list == NULL ? 0 : interface_list->length()); 3074 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass)); 3075 for (int i_index = 0; i_index < result_length; i_index += 1) { 3076 InstanceKlass* klass_at = interface_list->at(i_index); 3077 assert(klass_at->is_klass(), "interfaces must be Klass*s"); 3078 assert(klass_at->is_interface(), "interfaces must be interfaces"); 3079 oop mirror_at = klass_at->java_mirror(); 3080 Handle handle_at = Handle(current_thread, mirror_at); 3081 result_list[i_index] = (jclass) jni_reference(handle_at); 3082 } 3083 *interface_count_ptr = result_length; 3084 *interfaces_ptr = result_list; 3085 } 3086 3087 return JVMTI_ERROR_NONE; 3088 } /* end GetImplementedInterfaces */ 3089 3090 3091 // k_mirror - may be primitive, this must be checked 3092 // minor_version_ptr - pre-checked for NULL 3093 // major_version_ptr - pre-checked for NULL 3094 jvmtiError 3095 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) { 3096 if (java_lang_Class::is_primitive(k_mirror)) { 3097 return JVMTI_ERROR_ABSENT_INFORMATION; 3098 } 3099 Klass* klass = java_lang_Class::as_Klass(k_mirror); 3100 3101 jint status = klass->jvmti_class_status(); 3102 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 3103 return JVMTI_ERROR_INVALID_CLASS; 3104 } 3105 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 3106 return JVMTI_ERROR_ABSENT_INFORMATION; 3107 } 3108 3109 InstanceKlass* ik = InstanceKlass::cast(klass); 3110 *minor_version_ptr = ik->minor_version(); 3111 *major_version_ptr = ik->major_version(); 3112 3113 return JVMTI_ERROR_NONE; 3114 } /* end GetClassVersionNumbers */ 3115 3116 3117 // k_mirror - may be primitive, this must be checked 3118 // constant_pool_count_ptr - pre-checked for NULL 3119 // constant_pool_byte_count_ptr - pre-checked for NULL 3120 // constant_pool_bytes_ptr - pre-checked for NULL 3121 jvmtiError 3122 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) { 3123 if (java_lang_Class::is_primitive(k_mirror)) { 3124 return JVMTI_ERROR_ABSENT_INFORMATION; 3125 } 3126 3127 Klass* klass = java_lang_Class::as_Klass(k_mirror); 3128 Thread *thread = Thread::current(); 3129 ResourceMark rm(thread); 3130 3131 jint status = klass->jvmti_class_status(); 3132 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 3133 return JVMTI_ERROR_INVALID_CLASS; 3134 } 3135 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 3136 return JVMTI_ERROR_ABSENT_INFORMATION; 3137 } 3138 3139 InstanceKlass* ik = InstanceKlass::cast(klass); 3140 JvmtiConstantPoolReconstituter reconstituter(ik); 3141 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 3142 return reconstituter.get_error(); 3143 } 3144 3145 unsigned char *cpool_bytes; 3146 int cpool_size = reconstituter.cpool_size(); 3147 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 3148 return reconstituter.get_error(); 3149 } 3150 jvmtiError res = allocate(cpool_size, &cpool_bytes); 3151 if (res != JVMTI_ERROR_NONE) { 3152 return res; 3153 } 3154 reconstituter.copy_cpool_bytes(cpool_bytes); 3155 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 3156 return reconstituter.get_error(); 3157 } 3158 3159 constantPoolHandle constants(thread, ik->constants()); 3160 *constant_pool_count_ptr = constants->length(); 3161 *constant_pool_byte_count_ptr = cpool_size; 3162 *constant_pool_bytes_ptr = cpool_bytes; 3163 3164 return JVMTI_ERROR_NONE; 3165 } /* end GetConstantPool */ 3166 3167 3168 // k_mirror - may be primitive, this must be checked 3169 // is_interface_ptr - pre-checked for NULL 3170 jvmtiError 3171 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) { 3172 { 3173 bool result = false; 3174 if (!java_lang_Class::is_primitive(k_mirror)) { 3175 Klass* k = java_lang_Class::as_Klass(k_mirror); 3176 if (k != NULL && k->is_interface()) { 3177 result = true; 3178 } 3179 } 3180 *is_interface_ptr = result; 3181 } 3182 3183 return JVMTI_ERROR_NONE; 3184 } /* end IsInterface */ 3185 3186 3187 // k_mirror - may be primitive, this must be checked 3188 // is_array_class_ptr - pre-checked for NULL 3189 jvmtiError 3190 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) { 3191 { 3192 bool result = false; 3193 if (!java_lang_Class::is_primitive(k_mirror)) { 3194 Klass* k = java_lang_Class::as_Klass(k_mirror); 3195 if (k != NULL && k->is_array_klass()) { 3196 result = true; 3197 } 3198 } 3199 *is_array_class_ptr = result; 3200 } 3201 3202 return JVMTI_ERROR_NONE; 3203 } /* end IsArrayClass */ 3204 3205 3206 // k_mirror - may be primitive, this must be checked 3207 // classloader_ptr - pre-checked for NULL 3208 jvmtiError 3209 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) { 3210 { 3211 if (java_lang_Class::is_primitive(k_mirror)) { 3212 *classloader_ptr = (jclass) jni_reference(Handle()); 3213 return JVMTI_ERROR_NONE; 3214 } 3215 JavaThread* current_thread = JavaThread::current(); 3216 HandleMark hm(current_thread); 3217 Klass* k = java_lang_Class::as_Klass(k_mirror); 3218 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 3219 3220 oop result_oop = k->class_loader(); 3221 if (result_oop == NULL) { 3222 *classloader_ptr = (jclass) jni_reference(Handle()); 3223 return JVMTI_ERROR_NONE; 3224 } 3225 Handle result_handle = Handle(current_thread, result_oop); 3226 jclass result_jnihandle = (jclass) jni_reference(result_handle); 3227 *classloader_ptr = result_jnihandle; 3228 } 3229 return JVMTI_ERROR_NONE; 3230 } /* end GetClassLoader */ 3231 3232 3233 // k_mirror - may be primitive, this must be checked 3234 // source_debug_extension_ptr - pre-checked for NULL 3235 jvmtiError 3236 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) { 3237 { 3238 if (java_lang_Class::is_primitive(k_mirror)) { 3239 return JVMTI_ERROR_ABSENT_INFORMATION; 3240 } 3241 Klass* k = java_lang_Class::as_Klass(k_mirror); 3242 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 3243 if (!k->is_instance_klass()) { 3244 return JVMTI_ERROR_ABSENT_INFORMATION; 3245 } 3246 const char* sde = InstanceKlass::cast(k)->source_debug_extension(); 3247 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION); 3248 3249 { 3250 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1); 3251 strcpy(*source_debug_extension_ptr, sde); 3252 } 3253 } 3254 3255 return JVMTI_ERROR_NONE; 3256 } /* end GetSourceDebugExtension */ 3257 3258 // 3259 // Object functions 3260 // 3261 3262 // hash_code_ptr - pre-checked for NULL 3263 jvmtiError 3264 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) { 3265 oop mirror = JNIHandles::resolve_external_guard(object); 3266 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 3267 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER); 3268 3269 { 3270 jint result = (jint) mirror->identity_hash(); 3271 *hash_code_ptr = result; 3272 } 3273 return JVMTI_ERROR_NONE; 3274 } /* end GetObjectHashCode */ 3275 3276 3277 // info_ptr - pre-checked for NULL 3278 jvmtiError 3279 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) { 3280 // This needs to be performed at a safepoint to gather stable data 3281 // because monitor owner / waiters might not be suspended. 3282 VM_GetObjectMonitorUsage op(this, JavaThread::current(), object, info_ptr); 3283 VMThread::execute(&op); 3284 return op.result(); 3285 } /* end GetObjectMonitorUsage */ 3286 3287 3288 // 3289 // Field functions 3290 // 3291 3292 // name_ptr - NULL is a valid value, must be checked 3293 // signature_ptr - NULL is a valid value, must be checked 3294 // generic_ptr - NULL is a valid value, must be checked 3295 jvmtiError 3296 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) { 3297 JavaThread* current_thread = JavaThread::current(); 3298 ResourceMark rm(current_thread); 3299 if (name_ptr == NULL) { 3300 // just don't return the name 3301 } else { 3302 const char* fieldName = fdesc_ptr->name()->as_C_string(); 3303 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1); 3304 if (*name_ptr == NULL) 3305 return JVMTI_ERROR_OUT_OF_MEMORY; 3306 strcpy(*name_ptr, fieldName); 3307 } 3308 if (signature_ptr== NULL) { 3309 // just don't return the signature 3310 } else { 3311 const char* fieldSignature = fdesc_ptr->signature()->as_C_string(); 3312 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1); 3313 if (*signature_ptr == NULL) 3314 return JVMTI_ERROR_OUT_OF_MEMORY; 3315 strcpy(*signature_ptr, fieldSignature); 3316 } 3317 if (generic_ptr != NULL) { 3318 *generic_ptr = NULL; 3319 Symbol* soop = fdesc_ptr->generic_signature(); 3320 if (soop != NULL) { 3321 const char* gen_sig = soop->as_C_string(); 3322 if (gen_sig != NULL) { 3323 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 3324 if (err != JVMTI_ERROR_NONE) { 3325 return err; 3326 } 3327 strcpy(*generic_ptr, gen_sig); 3328 } 3329 } 3330 } 3331 return JVMTI_ERROR_NONE; 3332 } /* end GetFieldName */ 3333 3334 3335 // declaring_class_ptr - pre-checked for NULL 3336 jvmtiError 3337 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) { 3338 3339 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder()); 3340 return JVMTI_ERROR_NONE; 3341 } /* end GetFieldDeclaringClass */ 3342 3343 3344 // modifiers_ptr - pre-checked for NULL 3345 jvmtiError 3346 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) { 3347 3348 AccessFlags resultFlags = fdesc_ptr->access_flags(); 3349 jint result = resultFlags.as_int(); 3350 *modifiers_ptr = result; 3351 3352 return JVMTI_ERROR_NONE; 3353 } /* end GetFieldModifiers */ 3354 3355 3356 // is_synthetic_ptr - pre-checked for NULL 3357 jvmtiError 3358 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) { 3359 *is_synthetic_ptr = fdesc_ptr->is_synthetic(); 3360 return JVMTI_ERROR_NONE; 3361 } /* end IsFieldSynthetic */ 3362 3363 3364 // 3365 // Method functions 3366 // 3367 3368 // method - pre-checked for validity, but may be NULL meaning obsolete method 3369 // name_ptr - NULL is a valid value, must be checked 3370 // signature_ptr - NULL is a valid value, must be checked 3371 // generic_ptr - NULL is a valid value, must be checked 3372 jvmtiError 3373 JvmtiEnv::GetMethodName(Method* method, char** name_ptr, char** signature_ptr, char** generic_ptr) { 3374 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3375 JavaThread* current_thread = JavaThread::current(); 3376 3377 ResourceMark rm(current_thread); // get the utf8 name and signature 3378 if (name_ptr == NULL) { 3379 // just don't return the name 3380 } else { 3381 const char* utf8_name = (const char *) method->name()->as_utf8(); 3382 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1); 3383 strcpy(*name_ptr, utf8_name); 3384 } 3385 if (signature_ptr == NULL) { 3386 // just don't return the signature 3387 } else { 3388 const char* utf8_signature = (const char *) method->signature()->as_utf8(); 3389 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1); 3390 strcpy(*signature_ptr, utf8_signature); 3391 } 3392 3393 if (generic_ptr != NULL) { 3394 *generic_ptr = NULL; 3395 Symbol* soop = method->generic_signature(); 3396 if (soop != NULL) { 3397 const char* gen_sig = soop->as_C_string(); 3398 if (gen_sig != NULL) { 3399 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 3400 if (err != JVMTI_ERROR_NONE) { 3401 return err; 3402 } 3403 strcpy(*generic_ptr, gen_sig); 3404 } 3405 } 3406 } 3407 return JVMTI_ERROR_NONE; 3408 } /* end GetMethodName */ 3409 3410 3411 // method - pre-checked for validity, but may be NULL meaning obsolete method 3412 // declaring_class_ptr - pre-checked for NULL 3413 jvmtiError 3414 JvmtiEnv::GetMethodDeclaringClass(Method* method, jclass* declaring_class_ptr) { 3415 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3416 (*declaring_class_ptr) = get_jni_class_non_null(method->method_holder()); 3417 return JVMTI_ERROR_NONE; 3418 } /* end GetMethodDeclaringClass */ 3419 3420 3421 // method - pre-checked for validity, but may be NULL meaning obsolete method 3422 // modifiers_ptr - pre-checked for NULL 3423 jvmtiError 3424 JvmtiEnv::GetMethodModifiers(Method* method, jint* modifiers_ptr) { 3425 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3426 (*modifiers_ptr) = method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 3427 return JVMTI_ERROR_NONE; 3428 } /* end GetMethodModifiers */ 3429 3430 3431 // method - pre-checked for validity, but may be NULL meaning obsolete method 3432 // max_ptr - pre-checked for NULL 3433 jvmtiError 3434 JvmtiEnv::GetMaxLocals(Method* method, jint* max_ptr) { 3435 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3436 // get max stack 3437 (*max_ptr) = method->max_locals(); 3438 return JVMTI_ERROR_NONE; 3439 } /* end GetMaxLocals */ 3440 3441 3442 // method - pre-checked for validity, but may be NULL meaning obsolete method 3443 // size_ptr - pre-checked for NULL 3444 jvmtiError 3445 JvmtiEnv::GetArgumentsSize(Method* method, jint* size_ptr) { 3446 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3447 // get size of arguments 3448 3449 (*size_ptr) = method->size_of_parameters(); 3450 return JVMTI_ERROR_NONE; 3451 } /* end GetArgumentsSize */ 3452 3453 3454 // method - pre-checked for validity, but may be NULL meaning obsolete method 3455 // entry_count_ptr - pre-checked for NULL 3456 // table_ptr - pre-checked for NULL 3457 jvmtiError 3458 JvmtiEnv::GetLineNumberTable(Method* method, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) { 3459 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3460 if (!method->has_linenumber_table()) { 3461 return (JVMTI_ERROR_ABSENT_INFORMATION); 3462 } 3463 3464 // The line number table is compressed so we don't know how big it is until decompressed. 3465 // Decompression is really fast so we just do it twice. 3466 3467 // Compute size of table 3468 jint num_entries = 0; 3469 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); 3470 while (stream.read_pair()) { 3471 num_entries++; 3472 } 3473 jvmtiLineNumberEntry *jvmti_table = 3474 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry))); 3475 3476 // Fill jvmti table 3477 if (num_entries > 0) { 3478 int index = 0; 3479 CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); 3480 while (stream.read_pair()) { 3481 jvmti_table[index].start_location = (jlocation) stream.bci(); 3482 jvmti_table[index].line_number = (jint) stream.line(); 3483 index++; 3484 } 3485 assert(index == num_entries, "sanity check"); 3486 } 3487 3488 // Set up results 3489 (*entry_count_ptr) = num_entries; 3490 (*table_ptr) = jvmti_table; 3491 3492 return JVMTI_ERROR_NONE; 3493 } /* end GetLineNumberTable */ 3494 3495 3496 // method - pre-checked for validity, but may be NULL meaning obsolete method 3497 // start_location_ptr - pre-checked for NULL 3498 // end_location_ptr - pre-checked for NULL 3499 jvmtiError 3500 JvmtiEnv::GetMethodLocation(Method* method, jlocation* start_location_ptr, jlocation* end_location_ptr) { 3501 3502 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3503 // get start and end location 3504 (*end_location_ptr) = (jlocation) (method->code_size() - 1); 3505 if (method->code_size() == 0) { 3506 // there is no code so there is no start location 3507 (*start_location_ptr) = (jlocation)(-1); 3508 } else { 3509 (*start_location_ptr) = (jlocation)(0); 3510 } 3511 3512 return JVMTI_ERROR_NONE; 3513 } /* end GetMethodLocation */ 3514 3515 3516 // method - pre-checked for validity, but may be NULL meaning obsolete method 3517 // entry_count_ptr - pre-checked for NULL 3518 // table_ptr - pre-checked for NULL 3519 jvmtiError 3520 JvmtiEnv::GetLocalVariableTable(Method* method, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) { 3521 3522 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3523 JavaThread* current_thread = JavaThread::current(); 3524 3525 // does the klass have any local variable information? 3526 InstanceKlass* ik = method->method_holder(); 3527 if (!ik->has_localvariable_table()) { 3528 return (JVMTI_ERROR_ABSENT_INFORMATION); 3529 } 3530 3531 ConstantPool* constants = method->constants(); 3532 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION); 3533 3534 // in the vm localvariable table representation, 6 consecutive elements in the table 3535 // represent a 6-tuple of shorts 3536 // [start_pc, length, name_index, descriptor_index, signature_index, index] 3537 jint num_entries = method->localvariable_table_length(); 3538 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *) 3539 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry))); 3540 3541 if (num_entries > 0) { 3542 LocalVariableTableElement* table = method->localvariable_table_start(); 3543 for (int i = 0; i < num_entries; i++) { 3544 // get the 5 tuple information from the vm table 3545 jlocation start_location = (jlocation) table[i].start_bci; 3546 jint length = (jint) table[i].length; 3547 int name_index = (int) table[i].name_cp_index; 3548 int signature_index = (int) table[i].descriptor_cp_index; 3549 int generic_signature_index = (int) table[i].signature_cp_index; 3550 jint slot = (jint) table[i].slot; 3551 3552 // get utf8 name and signature 3553 char *name_buf = NULL; 3554 char *sig_buf = NULL; 3555 char *gen_sig_buf = NULL; 3556 { 3557 ResourceMark rm(current_thread); 3558 3559 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8(); 3560 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1); 3561 strcpy(name_buf, utf8_name); 3562 3563 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8(); 3564 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1); 3565 strcpy(sig_buf, utf8_signature); 3566 3567 if (generic_signature_index > 0) { 3568 const char *utf8_gen_sign = (const char *) 3569 constants->symbol_at(generic_signature_index)->as_utf8(); 3570 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1); 3571 strcpy(gen_sig_buf, utf8_gen_sign); 3572 } 3573 } 3574 3575 // fill in the jvmti local variable table 3576 jvmti_table[i].start_location = start_location; 3577 jvmti_table[i].length = length; 3578 jvmti_table[i].name = name_buf; 3579 jvmti_table[i].signature = sig_buf; 3580 jvmti_table[i].generic_signature = gen_sig_buf; 3581 jvmti_table[i].slot = slot; 3582 } 3583 } 3584 3585 // set results 3586 (*entry_count_ptr) = num_entries; 3587 (*table_ptr) = jvmti_table; 3588 3589 return JVMTI_ERROR_NONE; 3590 } /* end GetLocalVariableTable */ 3591 3592 3593 // method - pre-checked for validity, but may be NULL meaning obsolete method 3594 // bytecode_count_ptr - pre-checked for NULL 3595 // bytecodes_ptr - pre-checked for NULL 3596 jvmtiError 3597 JvmtiEnv::GetBytecodes(Method* method, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) { 3598 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3599 3600 methodHandle mh(Thread::current(), method); 3601 jint size = (jint)mh->code_size(); 3602 jvmtiError err = allocate(size, bytecodes_ptr); 3603 if (err != JVMTI_ERROR_NONE) { 3604 return err; 3605 } 3606 3607 (*bytecode_count_ptr) = size; 3608 // get byte codes 3609 JvmtiClassFileReconstituter::copy_bytecodes(mh, *bytecodes_ptr); 3610 3611 return JVMTI_ERROR_NONE; 3612 } /* end GetBytecodes */ 3613 3614 3615 // method - pre-checked for validity, but may be NULL meaning obsolete method 3616 // is_native_ptr - pre-checked for NULL 3617 jvmtiError 3618 JvmtiEnv::IsMethodNative(Method* method, jboolean* is_native_ptr) { 3619 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3620 (*is_native_ptr) = method->is_native(); 3621 return JVMTI_ERROR_NONE; 3622 } /* end IsMethodNative */ 3623 3624 3625 // method - pre-checked for validity, but may be NULL meaning obsolete method 3626 // is_synthetic_ptr - pre-checked for NULL 3627 jvmtiError 3628 JvmtiEnv::IsMethodSynthetic(Method* method, jboolean* is_synthetic_ptr) { 3629 NULL_CHECK(method, JVMTI_ERROR_INVALID_METHODID); 3630 (*is_synthetic_ptr) = method->is_synthetic(); 3631 return JVMTI_ERROR_NONE; 3632 } /* end IsMethodSynthetic */ 3633 3634 3635 // method - pre-checked for validity, but may be NULL meaning obsolete method 3636 // is_obsolete_ptr - pre-checked for NULL 3637 jvmtiError 3638 JvmtiEnv::IsMethodObsolete(Method* method, jboolean* is_obsolete_ptr) { 3639 if (use_version_1_0_semantics() && 3640 get_capabilities()->can_redefine_classes == 0) { 3641 // This JvmtiEnv requested version 1.0 semantics and this function 3642 // requires the can_redefine_classes capability in version 1.0 so 3643 // we need to return an error here. 3644 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3645 } 3646 3647 if (method == NULL || method->is_obsolete()) { 3648 *is_obsolete_ptr = true; 3649 } else { 3650 *is_obsolete_ptr = false; 3651 } 3652 return JVMTI_ERROR_NONE; 3653 } /* end IsMethodObsolete */ 3654 3655 // 3656 // Raw Monitor functions 3657 // 3658 3659 // name - pre-checked for NULL 3660 // monitor_ptr - pre-checked for NULL 3661 jvmtiError 3662 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) { 3663 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name); 3664 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY); 3665 3666 *monitor_ptr = (jrawMonitorID)rmonitor; 3667 3668 return JVMTI_ERROR_NONE; 3669 } /* end CreateRawMonitor */ 3670 3671 3672 // rmonitor - pre-checked for validity 3673 jvmtiError 3674 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) { 3675 if (Threads::number_of_threads() == 0) { 3676 // Remove this monitor from pending raw monitors list 3677 // if it has entered in onload or start phase. 3678 JvmtiPendingMonitors::destroy(rmonitor); 3679 } else { 3680 Thread* thread = Thread::current(); 3681 if (rmonitor->owner() == thread) { 3682 // The caller owns this monitor which we are about to destroy. 3683 // We exit the underlying synchronization object so that the 3684 // "delete monitor" call below can work without an assertion 3685 // failure on systems that don't like destroying synchronization 3686 // objects that are locked. 3687 int r; 3688 int recursion = rmonitor->recursions(); 3689 for (int i = 0; i <= recursion; i++) { 3690 r = rmonitor->raw_exit(thread); 3691 assert(r == JvmtiRawMonitor::M_OK, "raw_exit should have worked"); 3692 if (r != JvmtiRawMonitor::M_OK) { // robustness 3693 return JVMTI_ERROR_INTERNAL; 3694 } 3695 } 3696 } 3697 if (rmonitor->owner() != NULL) { 3698 // The caller is trying to destroy a monitor that is locked by 3699 // someone else. While this is not forbidden by the JVMTI 3700 // spec, it will cause an assertion failure on systems that don't 3701 // like destroying synchronization objects that are locked. 3702 // We indicate a problem with the error return (and leak the 3703 // monitor's memory). 3704 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3705 } 3706 } 3707 3708 delete rmonitor; 3709 3710 return JVMTI_ERROR_NONE; 3711 } /* end DestroyRawMonitor */ 3712 3713 3714 // rmonitor - pre-checked for validity 3715 jvmtiError 3716 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) { 3717 if (Threads::number_of_threads() == 0) { 3718 // No JavaThreads exist so JvmtiRawMonitor enter cannot be 3719 // used, add this raw monitor to the pending list. 3720 // The pending monitors will be actually entered when 3721 // the VM is setup. 3722 // See transition_pending_raw_monitors in create_vm() 3723 // in thread.cpp. 3724 JvmtiPendingMonitors::enter(rmonitor); 3725 } else { 3726 Thread* thread = Thread::current(); 3727 // 8266889: raw_enter changes Java thread state, needs WXWrite 3728 MACOS_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, thread)); 3729 rmonitor->raw_enter(thread); 3730 } 3731 return JVMTI_ERROR_NONE; 3732 } /* end RawMonitorEnter */ 3733 3734 3735 // rmonitor - pre-checked for validity 3736 jvmtiError 3737 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) { 3738 jvmtiError err = JVMTI_ERROR_NONE; 3739 3740 if (Threads::number_of_threads() == 0) { 3741 // No JavaThreads exist so just remove this monitor from the pending list. 3742 // Bool value from exit is false if rmonitor is not in the list. 3743 if (!JvmtiPendingMonitors::exit(rmonitor)) { 3744 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3745 } 3746 } else { 3747 Thread* thread = Thread::current(); 3748 int r = rmonitor->raw_exit(thread); 3749 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) { 3750 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3751 } 3752 } 3753 return err; 3754 } /* end RawMonitorExit */ 3755 3756 3757 // rmonitor - pre-checked for validity 3758 jvmtiError 3759 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) { 3760 Thread* thread = Thread::current(); 3761 // 8266889: raw_wait changes Java thread state, needs WXWrite 3762 MACOS_AARCH64_ONLY(ThreadWXEnable __wx(WXWrite, thread)); 3763 int r = rmonitor->raw_wait(millis, thread); 3764 3765 switch (r) { 3766 case JvmtiRawMonitor::M_INTERRUPTED: 3767 return JVMTI_ERROR_INTERRUPT; 3768 case JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE: 3769 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3770 default: 3771 return JVMTI_ERROR_NONE; 3772 } 3773 } /* end RawMonitorWait */ 3774 3775 3776 // rmonitor - pre-checked for validity 3777 jvmtiError 3778 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) { 3779 Thread* thread = Thread::current(); 3780 int r = rmonitor->raw_notify(thread); 3781 3782 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) { 3783 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3784 } 3785 return JVMTI_ERROR_NONE; 3786 } /* end RawMonitorNotify */ 3787 3788 3789 // rmonitor - pre-checked for validity 3790 jvmtiError 3791 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) { 3792 Thread* thread = Thread::current(); 3793 int r = rmonitor->raw_notifyAll(thread); 3794 3795 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) { 3796 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3797 } 3798 return JVMTI_ERROR_NONE; 3799 } /* end RawMonitorNotifyAll */ 3800 3801 3802 // 3803 // JNI Function Interception functions 3804 // 3805 3806 3807 // function_table - pre-checked for NULL 3808 jvmtiError 3809 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) { 3810 // Copy jni function table at safepoint. 3811 VM_JNIFunctionTableCopier copier(function_table); 3812 VMThread::execute(&copier); 3813 3814 return JVMTI_ERROR_NONE; 3815 } /* end SetJNIFunctionTable */ 3816 3817 3818 // function_table - pre-checked for NULL 3819 jvmtiError 3820 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) { 3821 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface)); 3822 if (*function_table == NULL) 3823 return JVMTI_ERROR_OUT_OF_MEMORY; 3824 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface)); 3825 return JVMTI_ERROR_NONE; 3826 } /* end GetJNIFunctionTable */ 3827 3828 3829 // 3830 // Event Management functions 3831 // 3832 3833 jvmtiError 3834 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) { 3835 // can only generate two event types 3836 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD && 3837 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) { 3838 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3839 } 3840 3841 // for compiled_method_load events we must check that the environment 3842 // has the can_generate_compiled_method_load_events capability. 3843 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) { 3844 if (get_capabilities()->can_generate_compiled_method_load_events == 0) { 3845 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3846 } 3847 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this); 3848 } else { 3849 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this); 3850 } 3851 3852 } /* end GenerateEvents */ 3853 3854 3855 // 3856 // Extension Mechanism functions 3857 // 3858 3859 // extension_count_ptr - pre-checked for NULL 3860 // extensions - pre-checked for NULL 3861 jvmtiError 3862 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) { 3863 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions); 3864 } /* end GetExtensionFunctions */ 3865 3866 3867 // extension_count_ptr - pre-checked for NULL 3868 // extensions - pre-checked for NULL 3869 jvmtiError 3870 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) { 3871 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions); 3872 } /* end GetExtensionEvents */ 3873 3874 3875 // callback - NULL is a valid value, must be checked 3876 jvmtiError 3877 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) { 3878 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback); 3879 } /* end SetExtensionEventCallback */ 3880 3881 // 3882 // Timers functions 3883 // 3884 3885 // info_ptr - pre-checked for NULL 3886 jvmtiError 3887 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3888 os::current_thread_cpu_time_info(info_ptr); 3889 return JVMTI_ERROR_NONE; 3890 } /* end GetCurrentThreadCpuTimerInfo */ 3891 3892 3893 // nanos_ptr - pre-checked for NULL 3894 jvmtiError 3895 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) { 3896 Thread* thread = Thread::current(); 3897 3898 // Surprisingly the GetCurrentThreadCpuTime is used by non-JavaThread's. 3899 if (thread->is_Java_thread()) { 3900 if (JavaThread::cast(thread)->is_vthread_mounted()) { 3901 // No support for virtual threads (yet). 3902 return JVMTI_ERROR_UNSUPPORTED_OPERATION; 3903 } 3904 } 3905 *nanos_ptr = os::current_thread_cpu_time(); 3906 return JVMTI_ERROR_NONE; 3907 } /* end GetCurrentThreadCpuTime */ 3908 3909 3910 // info_ptr - pre-checked for NULL 3911 jvmtiError 3912 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3913 os::thread_cpu_time_info(info_ptr); 3914 return JVMTI_ERROR_NONE; 3915 } /* end GetThreadCpuTimerInfo */ 3916 3917 3918 // nanos_ptr - pre-checked for NULL 3919 jvmtiError 3920 JvmtiEnv::GetThreadCpuTime(jthread thread, jlong* nanos_ptr) { 3921 JavaThread* current_thread = JavaThread::current(); 3922 ThreadsListHandle tlh(current_thread); 3923 JavaThread* java_thread = NULL; 3924 oop thread_oop = NULL; 3925 3926 jvmtiError err = get_threadOop_and_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 3927 3928 if (thread_oop != NULL && java_lang_VirtualThread::is_instance(thread_oop)) { 3929 // No support for virtual threads (yet). 3930 return JVMTI_ERROR_UNSUPPORTED_OPERATION; 3931 } 3932 if (err != JVMTI_ERROR_NONE) { 3933 return err; 3934 } 3935 NULL_CHECK(nanos_ptr, JVMTI_ERROR_NULL_POINTER); 3936 3937 *nanos_ptr = os::thread_cpu_time(java_thread); 3938 return JVMTI_ERROR_NONE; 3939 } /* end GetThreadCpuTime */ 3940 3941 3942 // info_ptr - pre-checked for NULL 3943 jvmtiError 3944 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) { 3945 os::javaTimeNanos_info(info_ptr); 3946 return JVMTI_ERROR_NONE; 3947 } /* end GetTimerInfo */ 3948 3949 3950 // nanos_ptr - pre-checked for NULL 3951 jvmtiError 3952 JvmtiEnv::GetTime(jlong* nanos_ptr) { 3953 *nanos_ptr = os::javaTimeNanos(); 3954 return JVMTI_ERROR_NONE; 3955 } /* end GetTime */ 3956 3957 3958 // processor_count_ptr - pre-checked for NULL 3959 jvmtiError 3960 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) { 3961 *processor_count_ptr = os::active_processor_count(); 3962 return JVMTI_ERROR_NONE; 3963 } /* end GetAvailableProcessors */ 3964 3965 jvmtiError 3966 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) { 3967 if (sampling_interval < 0) { 3968 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3969 } 3970 ThreadHeapSampler::set_sampling_interval(sampling_interval); 3971 return JVMTI_ERROR_NONE; 3972 } /* end SetHeapSamplingInterval */ 3973 3974 // 3975 // System Properties functions 3976 // 3977 3978 // count_ptr - pre-checked for NULL 3979 // property_ptr - pre-checked for NULL 3980 jvmtiError 3981 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) { 3982 jvmtiError err = JVMTI_ERROR_NONE; 3983 3984 // Get the number of readable properties. 3985 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties()); 3986 3987 // Allocate memory to hold the exact number of readable properties. 3988 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr); 3989 if (err != JVMTI_ERROR_NONE) { 3990 return err; 3991 } 3992 int readable_count = 0; 3993 // Loop through the system properties until all the readable properties are found. 3994 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) { 3995 if (p->readable()) { 3996 const char *key = p->key(); 3997 char **tmp_value = *property_ptr+readable_count; 3998 readable_count++; 3999 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value); 4000 if (err == JVMTI_ERROR_NONE) { 4001 strcpy(*tmp_value, key); 4002 } else { 4003 // clean up previously allocated memory. 4004 for (int j = 0; j < readable_count; j++) { 4005 Deallocate((unsigned char*)*property_ptr+j); 4006 } 4007 Deallocate((unsigned char*)property_ptr); 4008 break; 4009 } 4010 } 4011 } 4012 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count"); 4013 return err; 4014 } /* end GetSystemProperties */ 4015 4016 4017 // property - pre-checked for NULL 4018 // value_ptr - pre-checked for NULL 4019 jvmtiError 4020 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) { 4021 jvmtiError err = JVMTI_ERROR_NONE; 4022 const char *value; 4023 4024 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist. 4025 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property); 4026 if (value == NULL) { 4027 err = JVMTI_ERROR_NOT_AVAILABLE; 4028 } else { 4029 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr); 4030 if (err == JVMTI_ERROR_NONE) { 4031 strcpy(*value_ptr, value); 4032 } 4033 } 4034 return err; 4035 } /* end GetSystemProperty */ 4036 4037 4038 // property - pre-checked for NULL 4039 // value - NULL is a valid value, must be checked 4040 jvmtiError 4041 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) { 4042 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 4043 if (strcmp(property, p->key()) == 0) { 4044 if (p->writeable()) { 4045 if (p->set_value(value_ptr, AllocFailStrategy::RETURN_NULL)) { 4046 return JVMTI_ERROR_NONE; 4047 } else { 4048 return JVMTI_ERROR_OUT_OF_MEMORY; 4049 } 4050 } else { 4051 // We found a property, but it's not writeable 4052 return JVMTI_ERROR_NOT_AVAILABLE; 4053 } 4054 } 4055 } 4056 4057 // We cannot find a property of the given name 4058 return JVMTI_ERROR_NOT_AVAILABLE; 4059 } /* end SetSystemProperty */