1 /* 2 * Copyright (c) 2003, 2019, 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/vmSymbols.hpp" 32 #include "interpreter/bytecodeStream.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "jvmtifiles/jvmtiEnv.hpp" 35 #include "logging/log.hpp" 36 #include "logging/logConfiguration.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.hpp" 39 #include "oops/instanceKlass.hpp" 40 #include "oops/objArrayOop.inline.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "prims/jniCheck.hpp" 43 #include "prims/jvm_misc.hpp" 44 #include "prims/jvmtiAgentThread.hpp" 45 #include "prims/jvmtiClassFileReconstituter.hpp" 46 #include "prims/jvmtiCodeBlobEvents.hpp" 47 #include "prims/jvmtiExtensions.hpp" 48 #include "prims/jvmtiGetLoadedClasses.hpp" 49 #include "prims/jvmtiImpl.hpp" 50 #include "prims/jvmtiManageCapabilities.hpp" 51 #include "prims/jvmtiRawMonitor.hpp" 52 #include "prims/jvmtiRedefineClasses.hpp" 53 #include "prims/jvmtiTagMap.hpp" 54 #include "prims/jvmtiThreadState.inline.hpp" 55 #include "prims/jvmtiUtil.hpp" 56 #include "runtime/arguments.hpp" 57 #include "runtime/deoptimization.hpp" 58 #include "runtime/fieldDescriptor.inline.hpp" 59 #include "runtime/handles.inline.hpp" 60 #include "runtime/interfaceSupport.inline.hpp" 61 #include "runtime/javaCalls.hpp" 62 #include "runtime/jfieldIDWorkaround.hpp" 63 #include "runtime/jniHandles.inline.hpp" 64 #include "runtime/objectMonitor.inline.hpp" 65 #include "runtime/osThread.hpp" 66 #include "runtime/reflectionUtils.hpp" 67 #include "runtime/signature.hpp" 68 #include "runtime/thread.inline.hpp" 69 #include "runtime/threadHeapSampler.hpp" 70 #include "runtime/threadSMR.hpp" 71 #include "runtime/timerTrace.hpp" 72 #include "runtime/vframe.inline.hpp" 73 #include "runtime/vmThread.hpp" 74 #include "services/threadService.hpp" 75 #include "utilities/exceptions.hpp" 76 #include "utilities/preserveException.hpp" 77 #include "utilities/utf8.hpp" 78 79 80 #define FIXLATER 0 // REMOVE this when completed. 81 82 // FIXLATER: hook into JvmtiTrace 83 #define TraceJVMTICalls false 84 85 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) { 86 } 87 88 JvmtiEnv::~JvmtiEnv() { 89 } 90 91 JvmtiEnv* 92 JvmtiEnv::create_a_jvmti(jint version) { 93 return new JvmtiEnv(version); 94 } 95 96 // VM operation class to copy jni function table at safepoint. 97 // More than one java threads or jvmti agents may be reading/ 98 // modifying jni function tables. To reduce the risk of bad 99 // interaction b/w these threads it is copied at safepoint. 100 class VM_JNIFunctionTableCopier : public VM_Operation { 101 private: 102 const struct JNINativeInterface_ *_function_table; 103 public: 104 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) { 105 _function_table = func_tbl; 106 }; 107 108 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; } 109 void doit() { 110 copy_jni_function_table(_function_table); 111 }; 112 }; 113 114 // 115 // Do not change the "prefix" marker below, everything above it is copied 116 // unchanged into the filled stub, everything below is controlled by the 117 // stub filler (only method bodies are carried forward, and then only for 118 // functionality still in the spec). 119 // 120 // end file prefix 121 122 // 123 // Memory Management functions 124 // 125 126 // mem_ptr - pre-checked for NULL 127 jvmtiError 128 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) { 129 return allocate(size, mem_ptr); 130 } /* end Allocate */ 131 132 133 // mem - NULL is a valid value, must be checked 134 jvmtiError 135 JvmtiEnv::Deallocate(unsigned char* mem) { 136 return deallocate(mem); 137 } /* end Deallocate */ 138 139 // Threads_lock NOT held, java_thread not protected by lock 140 // java_thread - pre-checked 141 // data - NULL is a valid value, must be checked 142 jvmtiError 143 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) { 144 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 145 if (state == NULL) { 146 if (data == NULL) { 147 // leaving state unset same as data set to NULL 148 return JVMTI_ERROR_NONE; 149 } 150 // otherwise, create the state 151 state = JvmtiThreadState::state_for(java_thread); 152 if (state == NULL) { 153 return JVMTI_ERROR_THREAD_NOT_ALIVE; 154 } 155 } 156 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data); 157 return JVMTI_ERROR_NONE; 158 } /* end SetThreadLocalStorage */ 159 160 161 // Threads_lock NOT held 162 // thread - NOT pre-checked 163 // data_ptr - pre-checked for NULL 164 jvmtiError 165 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) { 166 JavaThread* current_thread = JavaThread::current(); 167 if (thread == NULL) { 168 JvmtiThreadState* state = current_thread->jvmti_thread_state(); 169 *data_ptr = (state == NULL) ? NULL : 170 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 171 } else { 172 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition 173 // the thread to _thread_in_vm. However, when the TLS for a thread 174 // other than the current thread is required we need to transition 175 // from native so as to resolve the jthread. 176 177 ThreadInVMfromNative __tiv(current_thread); 178 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread) 179 debug_only(VMNativeEntryWrapper __vew;) 180 181 JavaThread* java_thread = NULL; 182 ThreadsListHandle tlh(current_thread); 183 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL); 184 if (err != JVMTI_ERROR_NONE) { 185 return err; 186 } 187 188 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 189 *data_ptr = (state == NULL) ? NULL : 190 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 191 } 192 return JVMTI_ERROR_NONE; 193 } /* end GetThreadLocalStorage */ 194 195 // 196 // Module functions 197 // 198 199 // module_count_ptr - pre-checked for NULL 200 // modules_ptr - pre-checked for NULL 201 jvmtiError 202 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) { 203 JvmtiModuleClosure jmc; 204 205 return jmc.get_all_modules(this, module_count_ptr, modules_ptr); 206 } /* end GetAllModules */ 207 208 209 // class_loader - NULL is a valid value, must be pre-checked 210 // package_name - pre-checked for NULL 211 // module_ptr - pre-checked for NULL 212 jvmtiError 213 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) { 214 JavaThread* THREAD = JavaThread::current(); // pass to macros 215 ResourceMark rm(THREAD); 216 217 Handle h_loader (THREAD, JNIHandles::resolve(class_loader)); 218 // Check that loader is a subclass of java.lang.ClassLoader. 219 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) { 220 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 221 } 222 jobject module = Modules::get_named_module(h_loader, package_name, THREAD); 223 if (HAS_PENDING_EXCEPTION) { 224 CLEAR_PENDING_EXCEPTION; 225 return JVMTI_ERROR_INTERNAL; // unexpected exception 226 } 227 *module_ptr = module; 228 return JVMTI_ERROR_NONE; 229 } /* end GetNamedModule */ 230 231 232 // module - pre-checked for NULL 233 // to_module - pre-checked for NULL 234 jvmtiError 235 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) { 236 JavaThread* THREAD = JavaThread::current(); 237 238 // check module 239 Handle h_module(THREAD, JNIHandles::resolve(module)); 240 if (!java_lang_Module::is_instance(h_module())) { 241 return JVMTI_ERROR_INVALID_MODULE; 242 } 243 // check to_module 244 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 245 if (!java_lang_Module::is_instance(h_to_module())) { 246 return JVMTI_ERROR_INVALID_MODULE; 247 } 248 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD); 249 } /* end AddModuleReads */ 250 251 252 // module - pre-checked for NULL 253 // pkg_name - pre-checked for NULL 254 // to_module - pre-checked for NULL 255 jvmtiError 256 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) { 257 JavaThread* THREAD = JavaThread::current(); 258 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD); 259 260 // check module 261 Handle h_module(THREAD, JNIHandles::resolve(module)); 262 if (!java_lang_Module::is_instance(h_module())) { 263 return JVMTI_ERROR_INVALID_MODULE; 264 } 265 // check to_module 266 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 267 if (!java_lang_Module::is_instance(h_to_module())) { 268 return JVMTI_ERROR_INVALID_MODULE; 269 } 270 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD); 271 } /* end AddModuleExports */ 272 273 274 // module - pre-checked for NULL 275 // pkg_name - pre-checked for NULL 276 // to_module - pre-checked for NULL 277 jvmtiError 278 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) { 279 JavaThread* THREAD = JavaThread::current(); 280 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD); 281 282 // check module 283 Handle h_module(THREAD, JNIHandles::resolve(module)); 284 if (!java_lang_Module::is_instance(h_module())) { 285 return JVMTI_ERROR_INVALID_MODULE; 286 } 287 // check to_module 288 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 289 if (!java_lang_Module::is_instance(h_to_module())) { 290 return JVMTI_ERROR_INVALID_MODULE; 291 } 292 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD); 293 } /* end AddModuleOpens */ 294 295 296 // module - pre-checked for NULL 297 // service - pre-checked for NULL 298 jvmtiError 299 JvmtiEnv::AddModuleUses(jobject module, jclass service) { 300 JavaThread* THREAD = JavaThread::current(); 301 302 // check module 303 Handle h_module(THREAD, JNIHandles::resolve(module)); 304 if (!java_lang_Module::is_instance(h_module())) { 305 return JVMTI_ERROR_INVALID_MODULE; 306 } 307 // check service 308 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service)); 309 if (!java_lang_Class::is_instance(h_service()) || 310 java_lang_Class::is_primitive(h_service())) { 311 return JVMTI_ERROR_INVALID_CLASS; 312 } 313 return JvmtiExport::add_module_uses(h_module, h_service, THREAD); 314 } /* end AddModuleUses */ 315 316 317 // module - pre-checked for NULL 318 // service - pre-checked for NULL 319 // impl_class - pre-checked for NULL 320 jvmtiError 321 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) { 322 JavaThread* THREAD = JavaThread::current(); 323 324 // check module 325 Handle h_module(THREAD, JNIHandles::resolve(module)); 326 if (!java_lang_Module::is_instance(h_module())) { 327 return JVMTI_ERROR_INVALID_MODULE; 328 } 329 // check service 330 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service)); 331 if (!java_lang_Class::is_instance(h_service()) || 332 java_lang_Class::is_primitive(h_service())) { 333 return JVMTI_ERROR_INVALID_CLASS; 334 } 335 // check impl_class 336 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class)); 337 if (!java_lang_Class::is_instance(h_impl_class()) || 338 java_lang_Class::is_primitive(h_impl_class())) { 339 return JVMTI_ERROR_INVALID_CLASS; 340 } 341 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD); 342 } /* end AddModuleProvides */ 343 344 // module - pre-checked for NULL 345 // is_modifiable_class_ptr - pre-checked for NULL 346 jvmtiError 347 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) { 348 JavaThread* THREAD = JavaThread::current(); 349 350 // check module 351 Handle h_module(THREAD, JNIHandles::resolve(module)); 352 if (!java_lang_Module::is_instance(h_module())) { 353 return JVMTI_ERROR_INVALID_MODULE; 354 } 355 356 *is_modifiable_module_ptr = JNI_TRUE; 357 return JVMTI_ERROR_NONE; 358 } /* end IsModifiableModule */ 359 360 361 // 362 // Class functions 363 // 364 365 // class_count_ptr - pre-checked for NULL 366 // classes_ptr - pre-checked for NULL 367 jvmtiError 368 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) { 369 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr); 370 } /* end GetLoadedClasses */ 371 372 373 // initiating_loader - NULL is a valid value, must be checked 374 // class_count_ptr - pre-checked for NULL 375 // classes_ptr - pre-checked for NULL 376 jvmtiError 377 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) { 378 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader, 379 class_count_ptr, classes_ptr); 380 } /* end GetClassLoaderClasses */ 381 382 // k_mirror - may be primitive, this must be checked 383 // is_modifiable_class_ptr - pre-checked for NULL 384 jvmtiError 385 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) { 386 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)? 387 JNI_TRUE : JNI_FALSE; 388 return JVMTI_ERROR_NONE; 389 } /* end IsModifiableClass */ 390 391 // class_count - pre-checked to be greater than or equal to 0 392 // classes - pre-checked for NULL 393 jvmtiError 394 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) { 395 //TODO: add locking 396 397 int index; 398 JavaThread* current_thread = JavaThread::current(); 399 ResourceMark rm(current_thread); 400 401 jvmtiClassDefinition* class_definitions = 402 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count); 403 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY); 404 405 for (index = 0; index < class_count; index++) { 406 HandleMark hm(current_thread); 407 408 jclass jcls = classes[index]; 409 oop k_mirror = JNIHandles::resolve_external_guard(jcls); 410 if (k_mirror == NULL) { 411 return JVMTI_ERROR_INVALID_CLASS; 412 } 413 if (!k_mirror->is_a(SystemDictionary::Class_klass())) { 414 return JVMTI_ERROR_INVALID_CLASS; 415 } 416 417 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) { 418 return JVMTI_ERROR_UNMODIFIABLE_CLASS; 419 } 420 421 Klass* klass = java_lang_Class::as_Klass(k_mirror); 422 423 jint status = klass->jvmti_class_status(); 424 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 425 return JVMTI_ERROR_INVALID_CLASS; 426 } 427 428 InstanceKlass* ik = InstanceKlass::cast(klass); 429 if (ik->get_cached_class_file_bytes() == NULL) { 430 // Not cached, we need to reconstitute the class file from the 431 // VM representation. We don't attach the reconstituted class 432 // bytes to the InstanceKlass here because they have not been 433 // validated and we're not at a safepoint. 434 JvmtiClassFileReconstituter reconstituter(ik); 435 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 436 return reconstituter.get_error(); 437 } 438 439 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size(); 440 class_definitions[index].class_bytes = (unsigned char*) 441 reconstituter.class_file_bytes(); 442 } else { 443 // it is cached, get it from the cache 444 class_definitions[index].class_byte_count = ik->get_cached_class_file_len(); 445 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes(); 446 } 447 class_definitions[index].klass = jcls; 448 } 449 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform); 450 VMThread::execute(&op); 451 return (op.check_error()); 452 } /* end RetransformClasses */ 453 454 455 // class_count - pre-checked to be greater than or equal to 0 456 // class_definitions - pre-checked for NULL 457 jvmtiError 458 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) { 459 //TODO: add locking 460 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine); 461 VMThread::execute(&op); 462 return (op.check_error()); 463 } /* end RedefineClasses */ 464 465 466 // 467 // Object functions 468 // 469 470 // size_ptr - pre-checked for NULL 471 jvmtiError 472 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) { 473 oop mirror = JNIHandles::resolve_external_guard(object); 474 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 475 *size_ptr = (jlong)Universe::heap()->obj_size(mirror) * wordSize; 476 return JVMTI_ERROR_NONE; 477 } /* end GetObjectSize */ 478 479 // 480 // Method functions 481 // 482 483 // prefix - NULL is a valid value, must be checked 484 jvmtiError 485 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) { 486 return prefix == NULL? 487 SetNativeMethodPrefixes(0, NULL) : 488 SetNativeMethodPrefixes(1, (char**)&prefix); 489 } /* end SetNativeMethodPrefix */ 490 491 492 // prefix_count - pre-checked to be greater than or equal to 0 493 // prefixes - pre-checked for NULL 494 jvmtiError 495 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) { 496 // Have to grab JVMTI thread state lock to be sure that some thread 497 // isn't accessing the prefixes at the same time we are setting them. 498 // No locks during VM bring-up. 499 if (Threads::number_of_threads() == 0) { 500 return set_native_method_prefixes(prefix_count, prefixes); 501 } else { 502 MutexLocker mu(JvmtiThreadState_lock); 503 return set_native_method_prefixes(prefix_count, prefixes); 504 } 505 } /* end SetNativeMethodPrefixes */ 506 507 // 508 // Event Management functions 509 // 510 511 // callbacks - NULL is a valid value, must be checked 512 // size_of_callbacks - pre-checked to be greater than or equal to 0 513 jvmtiError 514 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) { 515 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks); 516 return JVMTI_ERROR_NONE; 517 } /* end SetEventCallbacks */ 518 519 520 // event_thread - NULL is a valid value, must be checked 521 jvmtiError 522 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) { 523 if (event_thread == NULL) { 524 // Can be called at Agent_OnLoad() time with event_thread == NULL 525 // when Thread::current() does not work yet so we cannot create a 526 // ThreadsListHandle that is common to both thread-specific and 527 // global code paths. 528 529 // event_type must be valid 530 if (!JvmtiEventController::is_valid_event_type(event_type)) { 531 return JVMTI_ERROR_INVALID_EVENT_TYPE; 532 } 533 534 bool enabled = (mode == JVMTI_ENABLE); 535 536 // assure that needed capabilities are present 537 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { 538 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 539 } 540 541 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { 542 record_class_file_load_hook_enabled(); 543 } 544 545 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled); 546 } else { 547 // We have a specified event_thread. 548 JavaThread* java_thread = NULL; 549 ThreadsListHandle tlh; 550 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL); 551 if (err != JVMTI_ERROR_NONE) { 552 return err; 553 } 554 555 // event_type must be valid 556 if (!JvmtiEventController::is_valid_event_type(event_type)) { 557 return JVMTI_ERROR_INVALID_EVENT_TYPE; 558 } 559 560 // global events cannot be controlled at thread level. 561 if (JvmtiEventController::is_global_event(event_type)) { 562 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 563 } 564 565 bool enabled = (mode == JVMTI_ENABLE); 566 567 // assure that needed capabilities are present 568 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { 569 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 570 } 571 572 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { 573 record_class_file_load_hook_enabled(); 574 } 575 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled); 576 } 577 578 return JVMTI_ERROR_NONE; 579 } /* end SetEventNotificationMode */ 580 581 // 582 // Capability functions 583 // 584 585 // capabilities_ptr - pre-checked for NULL 586 jvmtiError 587 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) { 588 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(), 589 get_prohibited_capabilities(), 590 capabilities_ptr); 591 return JVMTI_ERROR_NONE; 592 } /* end GetPotentialCapabilities */ 593 594 595 // capabilities_ptr - pre-checked for NULL 596 jvmtiError 597 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) { 598 return JvmtiManageCapabilities::add_capabilities(get_capabilities(), 599 get_prohibited_capabilities(), 600 capabilities_ptr, 601 get_capabilities()); 602 } /* end AddCapabilities */ 603 604 605 // capabilities_ptr - pre-checked for NULL 606 jvmtiError 607 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) { 608 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities()); 609 return JVMTI_ERROR_NONE; 610 } /* end RelinquishCapabilities */ 611 612 613 // capabilities_ptr - pre-checked for NULL 614 jvmtiError 615 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) { 616 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr); 617 return JVMTI_ERROR_NONE; 618 } /* end GetCapabilities */ 619 620 // 621 // Class Loader Search functions 622 // 623 624 // segment - pre-checked for NULL 625 jvmtiError 626 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) { 627 jvmtiPhase phase = get_phase(); 628 if (phase == JVMTI_PHASE_ONLOAD) { 629 Arguments::append_sysclasspath(segment); 630 return JVMTI_ERROR_NONE; 631 } else if (use_version_1_0_semantics()) { 632 // This JvmtiEnv requested version 1.0 semantics and this function 633 // is only allowed in the ONLOAD phase in version 1.0 so we need to 634 // return an error here. 635 return JVMTI_ERROR_WRONG_PHASE; 636 } else if (phase == JVMTI_PHASE_LIVE) { 637 // The phase is checked by the wrapper that called this function, 638 // but this thread could be racing with the thread that is 639 // terminating the VM so we check one more time. 640 641 // create the zip entry 642 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true); 643 if (zip_entry == NULL) { 644 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 645 } 646 647 // lock the loader 648 Thread* thread = Thread::current(); 649 HandleMark hm; 650 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock()); 651 652 ObjectLocker ol(loader_lock, thread); 653 654 // add the jar file to the bootclasspath 655 log_info(class, load)("opened: %s", zip_entry->name()); 656 #if INCLUDE_CDS 657 ClassLoaderExt::append_boot_classpath(zip_entry); 658 #else 659 ClassLoader::add_to_boot_append_entries(zip_entry); 660 #endif 661 return JVMTI_ERROR_NONE; 662 } else { 663 return JVMTI_ERROR_WRONG_PHASE; 664 } 665 666 } /* end AddToBootstrapClassLoaderSearch */ 667 668 669 // segment - pre-checked for NULL 670 jvmtiError 671 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) { 672 jvmtiPhase phase = get_phase(); 673 674 if (phase == JVMTI_PHASE_ONLOAD) { 675 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 676 if (strcmp("java.class.path", p->key()) == 0) { 677 p->append_value(segment); 678 break; 679 } 680 } 681 return JVMTI_ERROR_NONE; 682 } else if (phase == JVMTI_PHASE_LIVE) { 683 // The phase is checked by the wrapper that called this function, 684 // but this thread could be racing with the thread that is 685 // terminating the VM so we check one more time. 686 HandleMark hm; 687 688 // create the zip entry (which will open the zip file and hence 689 // check that the segment is indeed a zip file). 690 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false); 691 if (zip_entry == NULL) { 692 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 693 } 694 delete zip_entry; // no longer needed 695 696 // lock the loader 697 Thread* THREAD = Thread::current(); 698 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 699 700 ObjectLocker ol(loader, THREAD); 701 702 // need the path as java.lang.String 703 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD); 704 if (HAS_PENDING_EXCEPTION) { 705 CLEAR_PENDING_EXCEPTION; 706 return JVMTI_ERROR_INTERNAL; 707 } 708 709 // Invoke the appendToClassPathForInstrumentation method - if the method 710 // is not found it means the loader doesn't support adding to the class path 711 // in the live phase. 712 { 713 JavaValue res(T_VOID); 714 JavaCalls::call_special(&res, 715 loader, 716 loader->klass(), 717 vmSymbols::appendToClassPathForInstrumentation_name(), 718 vmSymbols::appendToClassPathForInstrumentation_signature(), 719 path, 720 THREAD); 721 if (HAS_PENDING_EXCEPTION) { 722 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 723 CLEAR_PENDING_EXCEPTION; 724 725 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) { 726 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED; 727 } else { 728 return JVMTI_ERROR_INTERNAL; 729 } 730 } 731 } 732 733 return JVMTI_ERROR_NONE; 734 } else { 735 return JVMTI_ERROR_WRONG_PHASE; 736 } 737 } /* end AddToSystemClassLoaderSearch */ 738 739 // 740 // General functions 741 // 742 743 // phase_ptr - pre-checked for NULL 744 jvmtiError 745 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) { 746 *phase_ptr = phase(); 747 return JVMTI_ERROR_NONE; 748 } /* end GetPhase */ 749 750 751 jvmtiError 752 JvmtiEnv::DisposeEnvironment() { 753 dispose(); 754 return JVMTI_ERROR_NONE; 755 } /* end DisposeEnvironment */ 756 757 758 // data - NULL is a valid value, must be checked 759 jvmtiError 760 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) { 761 set_env_local_storage(data); 762 return JVMTI_ERROR_NONE; 763 } /* end SetEnvironmentLocalStorage */ 764 765 766 // data_ptr - pre-checked for NULL 767 jvmtiError 768 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) { 769 *data_ptr = (void*)get_env_local_storage(); 770 return JVMTI_ERROR_NONE; 771 } /* end GetEnvironmentLocalStorage */ 772 773 // version_ptr - pre-checked for NULL 774 jvmtiError 775 JvmtiEnv::GetVersionNumber(jint* version_ptr) { 776 *version_ptr = JVMTI_VERSION; 777 return JVMTI_ERROR_NONE; 778 } /* end GetVersionNumber */ 779 780 781 // name_ptr - pre-checked for NULL 782 jvmtiError 783 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) { 784 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) { 785 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 786 } 787 const char *name = JvmtiUtil::error_name(error); 788 if (name == NULL) { 789 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 790 } 791 size_t len = strlen(name) + 1; 792 jvmtiError err = allocate(len, (unsigned char**)name_ptr); 793 if (err == JVMTI_ERROR_NONE) { 794 memcpy(*name_ptr, name, len); 795 } 796 return err; 797 } /* end GetErrorName */ 798 799 800 jvmtiError 801 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) { 802 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info; 803 switch (flag) { 804 case JVMTI_VERBOSE_OTHER: 805 // ignore 806 break; 807 case JVMTI_VERBOSE_CLASS: 808 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload)); 809 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load)); 810 break; 811 case JVMTI_VERBOSE_GC: 812 if (value == 0) { 813 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc)); 814 } else { 815 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); 816 } 817 break; 818 case JVMTI_VERBOSE_JNI: 819 PrintJNIResolving = value != 0; 820 break; 821 default: 822 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 823 }; 824 return JVMTI_ERROR_NONE; 825 } /* end SetVerboseFlag */ 826 827 828 // format_ptr - pre-checked for NULL 829 jvmtiError 830 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) { 831 *format_ptr = JVMTI_JLOCATION_JVMBCI; 832 return JVMTI_ERROR_NONE; 833 } /* end GetJLocationFormat */ 834 835 // 836 // Thread functions 837 // 838 839 // Threads_lock NOT held 840 // thread - NOT pre-checked 841 // thread_state_ptr - pre-checked for NULL 842 jvmtiError 843 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) { 844 JavaThread* current_thread = JavaThread::current(); 845 JavaThread* java_thread = NULL; 846 oop thread_oop = NULL; 847 ThreadsListHandle tlh(current_thread); 848 849 if (thread == NULL) { 850 java_thread = current_thread; 851 thread_oop = java_thread->threadObj(); 852 853 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 854 return JVMTI_ERROR_INVALID_THREAD; 855 } 856 } else { 857 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 858 if (err != JVMTI_ERROR_NONE) { 859 // We got an error code so we don't have a JavaThread *, but 860 // only return an error from here if we didn't get a valid 861 // thread_oop. 862 if (thread_oop == NULL) { 863 return err; 864 } 865 // We have a valid thread_oop so we can return some thread state. 866 } 867 } 868 869 // get most state bits 870 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop); 871 872 if (java_thread != NULL) { 873 // We have a JavaThread* so add more state bits. 874 JavaThreadState jts = java_thread->thread_state(); 875 876 if (java_thread->is_being_ext_suspended()) { 877 state |= JVMTI_THREAD_STATE_SUSPENDED; 878 } 879 if (jts == _thread_in_native) { 880 state |= JVMTI_THREAD_STATE_IN_NATIVE; 881 } 882 OSThread* osThread = java_thread->osthread(); 883 if (osThread != NULL && osThread->interrupted()) { 884 state |= JVMTI_THREAD_STATE_INTERRUPTED; 885 } 886 } 887 888 *thread_state_ptr = state; 889 return JVMTI_ERROR_NONE; 890 } /* end GetThreadState */ 891 892 893 // thread_ptr - pre-checked for NULL 894 jvmtiError 895 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) { 896 JavaThread* current_thread = JavaThread::current(); 897 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj()); 898 return JVMTI_ERROR_NONE; 899 } /* end GetCurrentThread */ 900 901 902 // threads_count_ptr - pre-checked for NULL 903 // threads_ptr - pre-checked for NULL 904 jvmtiError 905 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) { 906 int nthreads = 0; 907 Handle *thread_objs = NULL; 908 ResourceMark rm; 909 HandleMark hm; 910 911 // enumerate threads (including agent threads) 912 ThreadsListEnumerator tle(Thread::current(), true); 913 nthreads = tle.num_threads(); 914 *threads_count_ptr = nthreads; 915 916 if (nthreads == 0) { 917 *threads_ptr = NULL; 918 return JVMTI_ERROR_NONE; 919 } 920 921 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads); 922 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY); 923 924 for (int i = 0; i < nthreads; i++) { 925 thread_objs[i] = Handle(tle.get_threadObj(i)); 926 } 927 928 jthread *jthreads = new_jthreadArray(nthreads, thread_objs); 929 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY); 930 931 *threads_ptr = jthreads; 932 return JVMTI_ERROR_NONE; 933 } /* end GetAllThreads */ 934 935 936 // Threads_lock NOT held, java_thread not protected by lock 937 // java_thread - pre-checked 938 jvmtiError 939 JvmtiEnv::SuspendThread(JavaThread* java_thread) { 940 // don't allow hidden thread suspend request. 941 if (java_thread->is_hidden_from_external_view()) { 942 return (JVMTI_ERROR_NONE); 943 } 944 945 { 946 MutexLocker ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 947 if (java_thread->is_external_suspend()) { 948 // don't allow nested external suspend requests. 949 return (JVMTI_ERROR_THREAD_SUSPENDED); 950 } 951 if (java_thread->is_exiting()) { // thread is in the process of exiting 952 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 953 } 954 java_thread->set_external_suspend(); 955 } 956 957 if (!JvmtiSuspendControl::suspend(java_thread)) { 958 // the thread was in the process of exiting 959 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 960 } 961 return JVMTI_ERROR_NONE; 962 } /* end SuspendThread */ 963 964 965 // request_count - pre-checked to be greater than or equal to 0 966 // request_list - pre-checked for NULL 967 // results - pre-checked for NULL 968 jvmtiError 969 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 970 int needSafepoint = 0; // > 0 if we need a safepoint 971 ThreadsListHandle tlh; 972 for (int i = 0; i < request_count; i++) { 973 JavaThread *java_thread = NULL; 974 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL); 975 if (err != JVMTI_ERROR_NONE) { 976 results[i] = err; 977 continue; 978 } 979 // don't allow hidden thread suspend request. 980 if (java_thread->is_hidden_from_external_view()) { 981 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 982 continue; 983 } 984 985 { 986 MutexLocker ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 987 if (java_thread->is_external_suspend()) { 988 // don't allow nested external suspend requests. 989 results[i] = JVMTI_ERROR_THREAD_SUSPENDED; 990 continue; 991 } 992 if (java_thread->is_exiting()) { // thread is in the process of exiting 993 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 994 continue; 995 } 996 java_thread->set_external_suspend(); 997 } 998 if (java_thread->thread_state() == _thread_in_native) { 999 // We need to try and suspend native threads here. Threads in 1000 // other states will self-suspend on their next transition. 1001 if (!JvmtiSuspendControl::suspend(java_thread)) { 1002 // The thread was in the process of exiting. Force another 1003 // safepoint to make sure that this thread transitions. 1004 needSafepoint++; 1005 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 1006 continue; 1007 } 1008 } else { 1009 needSafepoint++; 1010 } 1011 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 1012 } 1013 if (needSafepoint > 0) { 1014 VM_ThreadsSuspendJVMTI tsj; 1015 VMThread::execute(&tsj); 1016 } 1017 // per-thread suspend results returned via results parameter 1018 return JVMTI_ERROR_NONE; 1019 } /* end SuspendThreadList */ 1020 1021 1022 // Threads_lock NOT held, java_thread not protected by lock 1023 // java_thread - pre-checked 1024 jvmtiError 1025 JvmtiEnv::ResumeThread(JavaThread* java_thread) { 1026 // don't allow hidden thread resume request. 1027 if (java_thread->is_hidden_from_external_view()) { 1028 return JVMTI_ERROR_NONE; 1029 } 1030 1031 if (!java_thread->is_being_ext_suspended()) { 1032 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1033 } 1034 1035 if (!JvmtiSuspendControl::resume(java_thread)) { 1036 return JVMTI_ERROR_INTERNAL; 1037 } 1038 return JVMTI_ERROR_NONE; 1039 } /* end ResumeThread */ 1040 1041 1042 // request_count - pre-checked to be greater than or equal to 0 1043 // request_list - pre-checked for NULL 1044 // results - pre-checked for NULL 1045 jvmtiError 1046 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 1047 ThreadsListHandle tlh; 1048 for (int i = 0; i < request_count; i++) { 1049 JavaThread* java_thread = NULL; 1050 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL); 1051 if (err != JVMTI_ERROR_NONE) { 1052 results[i] = err; 1053 continue; 1054 } 1055 // don't allow hidden thread resume request. 1056 if (java_thread->is_hidden_from_external_view()) { 1057 results[i] = JVMTI_ERROR_NONE; // indicate successful resume 1058 continue; 1059 } 1060 if (!java_thread->is_being_ext_suspended()) { 1061 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1062 continue; 1063 } 1064 1065 if (!JvmtiSuspendControl::resume(java_thread)) { 1066 results[i] = JVMTI_ERROR_INTERNAL; 1067 continue; 1068 } 1069 1070 results[i] = JVMTI_ERROR_NONE; // indicate successful resume 1071 } 1072 // per-thread resume results returned via results parameter 1073 return JVMTI_ERROR_NONE; 1074 } /* end ResumeThreadList */ 1075 1076 1077 // Threads_lock NOT held, java_thread not protected by lock 1078 // java_thread - pre-checked 1079 jvmtiError 1080 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) { 1081 oop e = JNIHandles::resolve_external_guard(exception); 1082 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER); 1083 1084 JavaThread::send_async_exception(java_thread->threadObj(), e); 1085 1086 return JVMTI_ERROR_NONE; 1087 1088 } /* end StopThread */ 1089 1090 1091 // Threads_lock NOT held 1092 // thread - NOT pre-checked 1093 jvmtiError 1094 JvmtiEnv::InterruptThread(jthread thread) { 1095 // TODO: this is very similar to JVM_Interrupt(); share code in future 1096 JavaThread* current_thread = JavaThread::current(); 1097 JavaThread* java_thread = NULL; 1098 ThreadsListHandle tlh(current_thread); 1099 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL); 1100 if (err != JVMTI_ERROR_NONE) { 1101 return err; 1102 } 1103 1104 Thread::interrupt(java_thread); 1105 1106 return JVMTI_ERROR_NONE; 1107 } /* end InterruptThread */ 1108 1109 1110 // Threads_lock NOT held 1111 // thread - NOT pre-checked 1112 // info_ptr - pre-checked for NULL 1113 jvmtiError 1114 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) { 1115 ResourceMark rm; 1116 HandleMark hm; 1117 1118 JavaThread* current_thread = JavaThread::current(); 1119 ThreadsListHandle tlh(current_thread); 1120 1121 // if thread is NULL the current thread is used 1122 oop thread_oop = NULL; 1123 if (thread == NULL) { 1124 thread_oop = current_thread->threadObj(); 1125 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 1126 return JVMTI_ERROR_INVALID_THREAD; 1127 } 1128 } else { 1129 JavaThread* java_thread = NULL; 1130 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1131 if (err != JVMTI_ERROR_NONE) { 1132 // We got an error code so we don't have a JavaThread *, but 1133 // only return an error from here if we didn't get a valid 1134 // thread_oop. 1135 if (thread_oop == NULL) { 1136 return err; 1137 } 1138 // We have a valid thread_oop so we can return some thread info. 1139 } 1140 } 1141 1142 Handle thread_obj(current_thread, thread_oop); 1143 Handle name; 1144 ThreadPriority priority; 1145 Handle thread_group; 1146 Handle context_class_loader; 1147 bool is_daemon; 1148 1149 name = Handle(current_thread, java_lang_Thread::name(thread_obj())); 1150 priority = java_lang_Thread::priority(thread_obj()); 1151 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj())); 1152 is_daemon = java_lang_Thread::is_daemon(thread_obj()); 1153 1154 oop loader = java_lang_Thread::context_class_loader(thread_obj()); 1155 context_class_loader = Handle(current_thread, loader); 1156 1157 { const char *n; 1158 1159 if (name() != NULL) { 1160 n = java_lang_String::as_utf8_string(name()); 1161 } else { 1162 int utf8_length = 0; 1163 n = UNICODE::as_utf8((jchar*) NULL, utf8_length); 1164 } 1165 1166 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1); 1167 if (info_ptr->name == NULL) 1168 return JVMTI_ERROR_OUT_OF_MEMORY; 1169 1170 strcpy(info_ptr->name, n); 1171 } 1172 info_ptr->is_daemon = is_daemon; 1173 info_ptr->priority = priority; 1174 1175 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL : 1176 jni_reference(context_class_loader); 1177 info_ptr->thread_group = jni_reference(thread_group); 1178 1179 return JVMTI_ERROR_NONE; 1180 } /* end GetThreadInfo */ 1181 1182 1183 // Threads_lock NOT held, java_thread not protected by lock 1184 // java_thread - pre-checked 1185 // owned_monitor_count_ptr - pre-checked for NULL 1186 // owned_monitors_ptr - pre-checked for NULL 1187 jvmtiError 1188 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) { 1189 jvmtiError err = JVMTI_ERROR_NONE; 1190 JavaThread* calling_thread = JavaThread::current(); 1191 1192 // growable array of jvmti monitors info on the C-heap 1193 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1194 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 1195 1196 // It is only safe to perform the direct operation on the current 1197 // thread. All other usage needs to use a vm-safepoint-op for safety. 1198 if (java_thread == calling_thread) { 1199 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1200 } else { 1201 // JVMTI get monitors info at safepoint. Do not require target thread to 1202 // be suspended. 1203 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); 1204 VMThread::execute(&op); 1205 err = op.result(); 1206 } 1207 jint owned_monitor_count = owned_monitors_list->length(); 1208 if (err == JVMTI_ERROR_NONE) { 1209 if ((err = allocate(owned_monitor_count * sizeof(jobject *), 1210 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) { 1211 // copy into the returned array 1212 for (int i = 0; i < owned_monitor_count; i++) { 1213 (*owned_monitors_ptr)[i] = 1214 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1215 } 1216 *owned_monitor_count_ptr = owned_monitor_count; 1217 } 1218 } 1219 // clean up. 1220 for (int i = 0; i < owned_monitor_count; i++) { 1221 deallocate((unsigned char*)owned_monitors_list->at(i)); 1222 } 1223 delete owned_monitors_list; 1224 1225 return err; 1226 } /* end GetOwnedMonitorInfo */ 1227 1228 1229 // Threads_lock NOT held, java_thread not protected by lock 1230 // java_thread - pre-checked 1231 // monitor_info_count_ptr - pre-checked for NULL 1232 // monitor_info_ptr - pre-checked for NULL 1233 jvmtiError 1234 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) { 1235 jvmtiError err = JVMTI_ERROR_NONE; 1236 JavaThread* calling_thread = JavaThread::current(); 1237 1238 // growable array of jvmti monitors info on the C-heap 1239 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1240 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 1241 1242 // It is only safe to perform the direct operation on the current 1243 // thread. All other usage needs to use a vm-safepoint-op for safety. 1244 if (java_thread == calling_thread) { 1245 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1246 } else { 1247 // JVMTI get owned monitors info at safepoint. Do not require target thread to 1248 // be suspended. 1249 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); 1250 VMThread::execute(&op); 1251 err = op.result(); 1252 } 1253 1254 jint owned_monitor_count = owned_monitors_list->length(); 1255 if (err == JVMTI_ERROR_NONE) { 1256 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo), 1257 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) { 1258 // copy to output array. 1259 for (int i = 0; i < owned_monitor_count; i++) { 1260 (*monitor_info_ptr)[i].monitor = 1261 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1262 (*monitor_info_ptr)[i].stack_depth = 1263 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth; 1264 } 1265 } 1266 *monitor_info_count_ptr = owned_monitor_count; 1267 } 1268 1269 // clean up. 1270 for (int i = 0; i < owned_monitor_count; i++) { 1271 deallocate((unsigned char*)owned_monitors_list->at(i)); 1272 } 1273 delete owned_monitors_list; 1274 1275 return err; 1276 } /* end GetOwnedMonitorStackDepthInfo */ 1277 1278 1279 // Threads_lock NOT held, java_thread not protected by lock 1280 // java_thread - pre-checked 1281 // monitor_ptr - pre-checked for NULL 1282 jvmtiError 1283 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) { 1284 jvmtiError err = JVMTI_ERROR_NONE; 1285 JavaThread* calling_thread = JavaThread::current(); 1286 1287 // It is only safe to perform the direct operation on the current 1288 // thread. All other usage needs to use a vm-safepoint-op for safety. 1289 if (java_thread == calling_thread) { 1290 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr); 1291 } else { 1292 // get contended monitor information at safepoint. 1293 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr); 1294 VMThread::execute(&op); 1295 err = op.result(); 1296 } 1297 return err; 1298 } /* end GetCurrentContendedMonitor */ 1299 1300 1301 // Threads_lock NOT held 1302 // thread - NOT pre-checked 1303 // proc - pre-checked for NULL 1304 // arg - NULL is a valid value, must be checked 1305 jvmtiError 1306 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) { 1307 JavaThread* current_thread = JavaThread::current(); 1308 1309 JavaThread* java_thread = NULL; 1310 oop thread_oop = NULL; 1311 ThreadsListHandle tlh(current_thread); 1312 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1313 if (err != JVMTI_ERROR_NONE) { 1314 // We got an error code so we don't have a JavaThread *, but 1315 // only return an error from here if we didn't get a valid 1316 // thread_oop. 1317 if (thread_oop == NULL) { 1318 return err; 1319 } 1320 // We have a valid thread_oop. 1321 } 1322 1323 if (java_thread != NULL) { 1324 // 'thread' refers to an existing JavaThread. 1325 return JVMTI_ERROR_INVALID_THREAD; 1326 } 1327 1328 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) { 1329 return JVMTI_ERROR_INVALID_PRIORITY; 1330 } 1331 1332 Handle thread_hndl(current_thread, thread_oop); 1333 { 1334 MutexLocker mu(Threads_lock); // grab Threads_lock 1335 1336 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg); 1337 1338 // At this point it may be possible that no osthread was created for the 1339 // JavaThread due to lack of memory. 1340 if (new_thread == NULL || new_thread->osthread() == NULL) { 1341 if (new_thread != NULL) { 1342 new_thread->smr_delete(); 1343 } 1344 return JVMTI_ERROR_OUT_OF_MEMORY; 1345 } 1346 1347 java_lang_Thread::set_thread(thread_hndl(), new_thread); 1348 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority); 1349 java_lang_Thread::set_daemon(thread_hndl()); 1350 1351 new_thread->set_threadObj(thread_hndl()); 1352 Threads::add(new_thread); 1353 Thread::start(new_thread); 1354 } // unlock Threads_lock 1355 1356 return JVMTI_ERROR_NONE; 1357 } /* end RunAgentThread */ 1358 1359 // 1360 // Thread Group functions 1361 // 1362 1363 // group_count_ptr - pre-checked for NULL 1364 // groups_ptr - pre-checked for NULL 1365 jvmtiError 1366 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) { 1367 JavaThread* current_thread = JavaThread::current(); 1368 1369 // Only one top level thread group now. 1370 *group_count_ptr = 1; 1371 1372 // Allocate memory to store global-refs to the thread groups. 1373 // Assume this area is freed by caller. 1374 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr)); 1375 1376 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY); 1377 1378 // Convert oop to Handle, then convert Handle to global-ref. 1379 { 1380 HandleMark hm(current_thread); 1381 Handle system_thread_group(current_thread, Universe::system_thread_group()); 1382 *groups_ptr[0] = jni_reference(system_thread_group); 1383 } 1384 1385 return JVMTI_ERROR_NONE; 1386 } /* end GetTopThreadGroups */ 1387 1388 1389 // info_ptr - pre-checked for NULL 1390 jvmtiError 1391 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) { 1392 ResourceMark rm; 1393 HandleMark hm; 1394 1395 JavaThread* current_thread = JavaThread::current(); 1396 1397 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group)); 1398 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP); 1399 1400 const char* name; 1401 Handle parent_group; 1402 bool is_daemon; 1403 ThreadPriority max_priority; 1404 1405 name = java_lang_ThreadGroup::name(group_obj()); 1406 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj())); 1407 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj()); 1408 max_priority = java_lang_ThreadGroup::maxPriority(group_obj()); 1409 1410 info_ptr->is_daemon = is_daemon; 1411 info_ptr->max_priority = max_priority; 1412 info_ptr->parent = jni_reference(parent_group); 1413 1414 if (name != NULL) { 1415 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1); 1416 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY); 1417 strcpy(info_ptr->name, name); 1418 } else { 1419 info_ptr->name = NULL; 1420 } 1421 1422 return JVMTI_ERROR_NONE; 1423 } /* end GetThreadGroupInfo */ 1424 1425 1426 // thread_count_ptr - pre-checked for NULL 1427 // threads_ptr - pre-checked for NULL 1428 // group_count_ptr - pre-checked for NULL 1429 // groups_ptr - pre-checked for NULL 1430 jvmtiError 1431 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) { 1432 JavaThread* current_thread = JavaThread::current(); 1433 oop group_obj = (oop) JNIHandles::resolve_external_guard(group); 1434 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP); 1435 1436 Handle *thread_objs = NULL; 1437 Handle *group_objs = NULL; 1438 int nthreads = 0; 1439 int ngroups = 0; 1440 int hidden_threads = 0; 1441 1442 ResourceMark rm(current_thread); 1443 HandleMark hm(current_thread); 1444 1445 Handle group_hdl(current_thread, group_obj); 1446 1447 { // Cannot allow thread or group counts to change. 1448 ObjectLocker ol(group_hdl, current_thread); 1449 1450 nthreads = java_lang_ThreadGroup::nthreads(group_hdl()); 1451 ngroups = java_lang_ThreadGroup::ngroups(group_hdl()); 1452 1453 if (nthreads > 0) { 1454 ThreadsListHandle tlh(current_thread); 1455 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl()); 1456 assert(nthreads <= threads->length(), "too many threads"); 1457 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads); 1458 for (int i = 0, j = 0; i < nthreads; i++) { 1459 oop thread_obj = threads->obj_at(i); 1460 assert(thread_obj != NULL, "thread_obj is NULL"); 1461 JavaThread *java_thread = NULL; 1462 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread); 1463 if (err == JVMTI_ERROR_NONE) { 1464 // Have a valid JavaThread*. 1465 if (java_thread->is_hidden_from_external_view()) { 1466 // Filter out hidden java threads. 1467 hidden_threads++; 1468 continue; 1469 } 1470 } else { 1471 // We couldn't convert thread_obj into a JavaThread*. 1472 if (err == JVMTI_ERROR_INVALID_THREAD) { 1473 // The thread_obj does not refer to a java.lang.Thread object 1474 // so skip it. 1475 hidden_threads++; 1476 continue; 1477 } 1478 // We have a valid thread_obj, but no JavaThread*; the caller 1479 // can still have limited use for the thread_obj. 1480 } 1481 thread_objs[j++] = Handle(current_thread, thread_obj); 1482 } 1483 nthreads -= hidden_threads; 1484 } // ThreadsListHandle is destroyed here. 1485 1486 if (ngroups > 0) { 1487 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl()); 1488 assert(ngroups <= groups->length(), "too many groups"); 1489 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups); 1490 for (int i = 0; i < ngroups; i++) { 1491 oop group_obj = groups->obj_at(i); 1492 assert(group_obj != NULL, "group_obj != NULL"); 1493 group_objs[i] = Handle(current_thread, group_obj); 1494 } 1495 } 1496 } // ThreadGroup unlocked here 1497 1498 *group_count_ptr = ngroups; 1499 *thread_count_ptr = nthreads; 1500 *threads_ptr = new_jthreadArray(nthreads, thread_objs); 1501 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs); 1502 if ((nthreads > 0) && (*threads_ptr == NULL)) { 1503 return JVMTI_ERROR_OUT_OF_MEMORY; 1504 } 1505 if ((ngroups > 0) && (*groups_ptr == NULL)) { 1506 return JVMTI_ERROR_OUT_OF_MEMORY; 1507 } 1508 1509 return JVMTI_ERROR_NONE; 1510 } /* end GetThreadGroupChildren */ 1511 1512 1513 // 1514 // Stack Frame functions 1515 // 1516 1517 // Threads_lock NOT held, java_thread not protected by lock 1518 // java_thread - pre-checked 1519 // max_frame_count - pre-checked to be greater than or equal to 0 1520 // frame_buffer - pre-checked for NULL 1521 // count_ptr - pre-checked for NULL 1522 jvmtiError 1523 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) { 1524 jvmtiError err = JVMTI_ERROR_NONE; 1525 1526 // It is only safe to perform the direct operation on the current 1527 // thread. All other usage needs to use a vm-safepoint-op for safety. 1528 if (java_thread == JavaThread::current()) { 1529 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1530 } else { 1531 // JVMTI get stack trace at safepoint. Do not require target thread to 1532 // be suspended. 1533 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1534 VMThread::execute(&op); 1535 err = op.result(); 1536 } 1537 1538 return err; 1539 } /* end GetStackTrace */ 1540 1541 1542 // max_frame_count - pre-checked to be greater than or equal to 0 1543 // stack_info_ptr - pre-checked for NULL 1544 // thread_count_ptr - pre-checked for NULL 1545 jvmtiError 1546 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) { 1547 jvmtiError err = JVMTI_ERROR_NONE; 1548 JavaThread* calling_thread = JavaThread::current(); 1549 1550 // JVMTI get stack traces at safepoint. 1551 VM_GetAllStackTraces op(this, calling_thread, max_frame_count); 1552 VMThread::execute(&op); 1553 *thread_count_ptr = op.final_thread_count(); 1554 *stack_info_ptr = op.stack_info(); 1555 err = op.result(); 1556 return err; 1557 } /* end GetAllStackTraces */ 1558 1559 1560 // thread_count - pre-checked to be greater than or equal to 0 1561 // thread_list - pre-checked for NULL 1562 // max_frame_count - pre-checked to be greater than or equal to 0 1563 // stack_info_ptr - pre-checked for NULL 1564 jvmtiError 1565 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) { 1566 jvmtiError err = JVMTI_ERROR_NONE; 1567 // JVMTI get stack traces at safepoint. 1568 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count); 1569 VMThread::execute(&op); 1570 err = op.result(); 1571 if (err == JVMTI_ERROR_NONE) { 1572 *stack_info_ptr = op.stack_info(); 1573 } 1574 return err; 1575 } /* end GetThreadListStackTraces */ 1576 1577 1578 // Threads_lock NOT held, java_thread not protected by lock 1579 // java_thread - pre-checked 1580 // count_ptr - pre-checked for NULL 1581 jvmtiError 1582 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) { 1583 jvmtiError err = JVMTI_ERROR_NONE; 1584 1585 // retrieve or create JvmtiThreadState. 1586 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1587 if (state == NULL) { 1588 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1589 } 1590 1591 // It is only safe to perform the direct operation on the current 1592 // thread. All other usage needs to use a vm-safepoint-op for safety. 1593 if (java_thread == JavaThread::current()) { 1594 err = get_frame_count(state, count_ptr); 1595 } else { 1596 // get java stack frame count at safepoint. 1597 VM_GetFrameCount op(this, state, count_ptr); 1598 VMThread::execute(&op); 1599 err = op.result(); 1600 } 1601 return err; 1602 } /* end GetFrameCount */ 1603 1604 1605 // Threads_lock NOT held, java_thread not protected by lock 1606 // java_thread - pre-checked 1607 jvmtiError 1608 JvmtiEnv::PopFrame(JavaThread* java_thread) { 1609 JavaThread* current_thread = JavaThread::current(); 1610 HandleMark hm(current_thread); 1611 uint32_t debug_bits = 0; 1612 1613 // retrieve or create the state 1614 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1615 if (state == NULL) { 1616 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1617 } 1618 1619 // Check if java_thread is fully suspended 1620 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) { 1621 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1622 } 1623 // Check to see if a PopFrame was already in progress 1624 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) { 1625 // Probably possible for JVMTI clients to trigger this, but the 1626 // JPDA backend shouldn't allow this to happen 1627 return JVMTI_ERROR_INTERNAL; 1628 } 1629 1630 { 1631 // Was workaround bug 1632 // 4812902: popFrame hangs if the method is waiting at a synchronize 1633 // Catch this condition and return an error to avoid hanging. 1634 // Now JVMTI spec allows an implementation to bail out with an opaque frame error. 1635 OSThread* osThread = java_thread->osthread(); 1636 if (osThread->get_state() == MONITOR_WAIT) { 1637 return JVMTI_ERROR_OPAQUE_FRAME; 1638 } 1639 } 1640 1641 { 1642 ResourceMark rm(current_thread); 1643 // Check if there are more than one Java frame in this thread, that the top two frames 1644 // are Java (not native) frames, and that there is no intervening VM frame 1645 int frame_count = 0; 1646 bool is_interpreted[2]; 1647 intptr_t *frame_sp[2]; 1648 // The 2-nd arg of constructor is needed to stop iterating at java entry frame. 1649 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) { 1650 methodHandle mh(current_thread, vfs.method()); 1651 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME); 1652 is_interpreted[frame_count] = vfs.is_interpreted_frame(); 1653 frame_sp[frame_count] = vfs.frame_id(); 1654 if (++frame_count > 1) break; 1655 } 1656 if (frame_count < 2) { 1657 // We haven't found two adjacent non-native Java frames on the top. 1658 // There can be two situations here: 1659 // 1. There are no more java frames 1660 // 2. Two top java frames are separated by non-java native frames 1661 if(vframeFor(java_thread, 1) == NULL) { 1662 return JVMTI_ERROR_NO_MORE_FRAMES; 1663 } else { 1664 // Intervening non-java native or VM frames separate java frames. 1665 // Current implementation does not support this. See bug #5031735. 1666 // In theory it is possible to pop frames in such cases. 1667 return JVMTI_ERROR_OPAQUE_FRAME; 1668 } 1669 } 1670 1671 // If any of the top 2 frames is a compiled one, need to deoptimize it 1672 for (int i = 0; i < 2; i++) { 1673 if (!is_interpreted[i]) { 1674 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]); 1675 } 1676 } 1677 1678 // Update the thread state to reflect that the top frame is popped 1679 // so that cur_stack_depth is maintained properly and all frameIDs 1680 // are invalidated. 1681 // The current frame will be popped later when the suspended thread 1682 // is resumed and right before returning from VM to Java. 1683 // (see call_VM_base() in assembler_<cpu>.cpp). 1684 1685 // It's fine to update the thread state here because no JVMTI events 1686 // shall be posted for this PopFrame. 1687 1688 // It is only safe to perform the direct operation on the current 1689 // thread. All other usage needs to use a vm-safepoint-op for safety. 1690 if (java_thread == JavaThread::current()) { 1691 state->update_for_pop_top_frame(); 1692 } else { 1693 VM_UpdateForPopTopFrame op(state); 1694 VMThread::execute(&op); 1695 jvmtiError err = op.result(); 1696 if (err != JVMTI_ERROR_NONE) { 1697 return err; 1698 } 1699 } 1700 1701 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit); 1702 // Set pending step flag for this popframe and it is cleared when next 1703 // step event is posted. 1704 state->set_pending_step_for_popframe(); 1705 } 1706 1707 return JVMTI_ERROR_NONE; 1708 } /* end PopFrame */ 1709 1710 1711 // Threads_lock NOT held, java_thread not protected by lock 1712 // java_thread - pre-checked 1713 // java_thread - unchecked 1714 // depth - pre-checked as non-negative 1715 // method_ptr - pre-checked for NULL 1716 // location_ptr - pre-checked for NULL 1717 jvmtiError 1718 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) { 1719 jvmtiError err = JVMTI_ERROR_NONE; 1720 1721 // It is only safe to perform the direct operation on the current 1722 // thread. All other usage needs to use a vm-safepoint-op for safety. 1723 if (java_thread == JavaThread::current()) { 1724 err = get_frame_location(java_thread, depth, method_ptr, location_ptr); 1725 } else { 1726 // JVMTI get java stack frame location at safepoint. 1727 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr); 1728 VMThread::execute(&op); 1729 err = op.result(); 1730 } 1731 return err; 1732 } /* end GetFrameLocation */ 1733 1734 1735 // Threads_lock NOT held, java_thread not protected by lock 1736 // java_thread - pre-checked 1737 // java_thread - unchecked 1738 // depth - pre-checked as non-negative 1739 jvmtiError 1740 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) { 1741 jvmtiError err = JVMTI_ERROR_NONE; 1742 ResourceMark rm; 1743 uint32_t debug_bits = 0; 1744 1745 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread); 1746 if (state == NULL) { 1747 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1748 } 1749 1750 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) { 1751 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1752 } 1753 1754 if (TraceJVMTICalls) { 1755 JvmtiSuspendControl::print(); 1756 } 1757 1758 vframe *vf = vframeFor(java_thread, depth); 1759 if (vf == NULL) { 1760 return JVMTI_ERROR_NO_MORE_FRAMES; 1761 } 1762 1763 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) { 1764 return JVMTI_ERROR_OPAQUE_FRAME; 1765 } 1766 1767 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL"); 1768 1769 // It is only safe to perform the direct operation on the current 1770 // thread. All other usage needs to use a vm-safepoint-op for safety. 1771 if (java_thread == JavaThread::current()) { 1772 int frame_number = state->count_frames() - depth; 1773 state->env_thread_state(this)->set_frame_pop(frame_number); 1774 } else { 1775 VM_SetFramePop op(this, state, depth); 1776 VMThread::execute(&op); 1777 err = op.result(); 1778 } 1779 return err; 1780 } /* end NotifyFramePop */ 1781 1782 1783 // 1784 // Force Early Return functions 1785 // 1786 1787 // Threads_lock NOT held, java_thread not protected by lock 1788 // java_thread - pre-checked 1789 jvmtiError 1790 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) { 1791 jvalue val; 1792 val.l = value; 1793 return force_early_return(java_thread, val, atos); 1794 } /* end ForceEarlyReturnObject */ 1795 1796 1797 // Threads_lock NOT held, java_thread not protected by lock 1798 // java_thread - pre-checked 1799 jvmtiError 1800 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) { 1801 jvalue val; 1802 val.i = value; 1803 return force_early_return(java_thread, val, itos); 1804 } /* end ForceEarlyReturnInt */ 1805 1806 1807 // Threads_lock NOT held, java_thread not protected by lock 1808 // java_thread - pre-checked 1809 jvmtiError 1810 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) { 1811 jvalue val; 1812 val.j = value; 1813 return force_early_return(java_thread, val, ltos); 1814 } /* end ForceEarlyReturnLong */ 1815 1816 1817 // Threads_lock NOT held, java_thread not protected by lock 1818 // java_thread - pre-checked 1819 jvmtiError 1820 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) { 1821 jvalue val; 1822 val.f = value; 1823 return force_early_return(java_thread, val, ftos); 1824 } /* end ForceEarlyReturnFloat */ 1825 1826 1827 // Threads_lock NOT held, java_thread not protected by lock 1828 // java_thread - pre-checked 1829 jvmtiError 1830 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) { 1831 jvalue val; 1832 val.d = value; 1833 return force_early_return(java_thread, val, dtos); 1834 } /* end ForceEarlyReturnDouble */ 1835 1836 1837 // Threads_lock NOT held, java_thread not protected by lock 1838 // java_thread - pre-checked 1839 jvmtiError 1840 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) { 1841 jvalue val; 1842 val.j = 0L; 1843 return force_early_return(java_thread, val, vtos); 1844 } /* end ForceEarlyReturnVoid */ 1845 1846 1847 // 1848 // Heap functions 1849 // 1850 1851 // klass - NULL is a valid value, must be checked 1852 // initial_object - NULL is a valid value, must be checked 1853 // callbacks - pre-checked for NULL 1854 // user_data - NULL is a valid value, must be checked 1855 jvmtiError 1856 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1857 // check klass if provided 1858 Klass* k = NULL; 1859 if (klass != NULL) { 1860 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1861 if (k_mirror == NULL) { 1862 return JVMTI_ERROR_INVALID_CLASS; 1863 } 1864 if (java_lang_Class::is_primitive(k_mirror)) { 1865 return JVMTI_ERROR_NONE; 1866 } 1867 k = java_lang_Class::as_Klass(k_mirror); 1868 if (klass == NULL) { 1869 return JVMTI_ERROR_INVALID_CLASS; 1870 } 1871 } 1872 1873 if (initial_object != NULL) { 1874 oop init_obj = JNIHandles::resolve_external_guard(initial_object); 1875 if (init_obj == NULL) { 1876 return JVMTI_ERROR_INVALID_OBJECT; 1877 } 1878 } 1879 1880 Thread *thread = Thread::current(); 1881 HandleMark hm(thread); 1882 1883 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1884 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data); 1885 return JVMTI_ERROR_NONE; 1886 } /* end FollowReferences */ 1887 1888 1889 // klass - NULL is a valid value, must be checked 1890 // callbacks - pre-checked for NULL 1891 // user_data - NULL is a valid value, must be checked 1892 jvmtiError 1893 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1894 // check klass if provided 1895 Klass* k = NULL; 1896 if (klass != NULL) { 1897 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1898 if (k_mirror == NULL) { 1899 return JVMTI_ERROR_INVALID_CLASS; 1900 } 1901 if (java_lang_Class::is_primitive(k_mirror)) { 1902 return JVMTI_ERROR_NONE; 1903 } 1904 k = java_lang_Class::as_Klass(k_mirror); 1905 if (k == NULL) { 1906 return JVMTI_ERROR_INVALID_CLASS; 1907 } 1908 } 1909 1910 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1911 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data); 1912 return JVMTI_ERROR_NONE; 1913 } /* end IterateThroughHeap */ 1914 1915 1916 // tag_ptr - pre-checked for NULL 1917 jvmtiError 1918 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) { 1919 oop o = JNIHandles::resolve_external_guard(object); 1920 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1921 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object); 1922 return JVMTI_ERROR_NONE; 1923 } /* end GetTag */ 1924 1925 1926 jvmtiError 1927 JvmtiEnv::SetTag(jobject object, jlong tag) { 1928 oop o = JNIHandles::resolve_external_guard(object); 1929 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1930 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag); 1931 return JVMTI_ERROR_NONE; 1932 } /* end SetTag */ 1933 1934 1935 // tag_count - pre-checked to be greater than or equal to 0 1936 // tags - pre-checked for NULL 1937 // count_ptr - pre-checked for NULL 1938 // object_result_ptr - NULL is a valid value, must be checked 1939 // tag_result_ptr - NULL is a valid value, must be checked 1940 jvmtiError 1941 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { 1942 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1943 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr); 1944 } /* end GetObjectsWithTags */ 1945 1946 1947 jvmtiError 1948 JvmtiEnv::ForceGarbageCollection() { 1949 Universe::heap()->collect(GCCause::_jvmti_force_gc); 1950 return JVMTI_ERROR_NONE; 1951 } /* end ForceGarbageCollection */ 1952 1953 1954 // 1955 // Heap (1.0) functions 1956 // 1957 1958 // object_reference_callback - pre-checked for NULL 1959 // user_data - NULL is a valid value, must be checked 1960 jvmtiError 1961 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) { 1962 oop o = JNIHandles::resolve_external_guard(object); 1963 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1964 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data); 1965 return JVMTI_ERROR_NONE; 1966 } /* end IterateOverObjectsReachableFromObject */ 1967 1968 1969 // heap_root_callback - NULL is a valid value, must be checked 1970 // stack_ref_callback - NULL is a valid value, must be checked 1971 // object_ref_callback - NULL is a valid value, must be checked 1972 // user_data - NULL is a valid value, must be checked 1973 jvmtiError 1974 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) { 1975 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1976 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data); 1977 return JVMTI_ERROR_NONE; 1978 } /* end IterateOverReachableObjects */ 1979 1980 1981 // heap_object_callback - pre-checked for NULL 1982 // user_data - NULL is a valid value, must be checked 1983 jvmtiError 1984 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1985 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1986 Thread *thread = Thread::current(); 1987 HandleMark hm(thread); 1988 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data); 1989 return JVMTI_ERROR_NONE; 1990 } /* end IterateOverHeap */ 1991 1992 1993 // k_mirror - may be primitive, this must be checked 1994 // heap_object_callback - pre-checked for NULL 1995 // user_data - NULL is a valid value, must be checked 1996 jvmtiError 1997 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1998 if (java_lang_Class::is_primitive(k_mirror)) { 1999 // DO PRIMITIVE CLASS PROCESSING 2000 return JVMTI_ERROR_NONE; 2001 } 2002 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2003 if (klass == NULL) { 2004 return JVMTI_ERROR_INVALID_CLASS; 2005 } 2006 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2007 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data); 2008 return JVMTI_ERROR_NONE; 2009 } /* end IterateOverInstancesOfClass */ 2010 2011 2012 // 2013 // Local Variable functions 2014 // 2015 2016 // Threads_lock NOT held, java_thread not protected by lock 2017 // java_thread - pre-checked 2018 // java_thread - unchecked 2019 // depth - pre-checked as non-negative 2020 // value_ptr - pre-checked for NULL 2021 jvmtiError 2022 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) { 2023 JavaThread* current_thread = JavaThread::current(); 2024 // rm object is created to clean up the javaVFrame created in 2025 // doit_prologue(), but after doit() is finished with it. 2026 ResourceMark rm(current_thread); 2027 2028 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot); 2029 VMThread::execute(&op); 2030 jvmtiError err = op.result(); 2031 if (err != JVMTI_ERROR_NONE) { 2032 return err; 2033 } else { 2034 *value_ptr = op.value().l; 2035 return JVMTI_ERROR_NONE; 2036 } 2037 } /* end GetLocalObject */ 2038 2039 // Threads_lock NOT held, java_thread not protected by lock 2040 // java_thread - pre-checked 2041 // java_thread - unchecked 2042 // depth - pre-checked as non-negative 2043 // value - pre-checked for NULL 2044 jvmtiError 2045 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){ 2046 JavaThread* current_thread = JavaThread::current(); 2047 // rm object is created to clean up the javaVFrame created in 2048 // doit_prologue(), but after doit() is finished with it. 2049 ResourceMark rm(current_thread); 2050 2051 VM_GetReceiver op(java_thread, current_thread, depth); 2052 VMThread::execute(&op); 2053 jvmtiError err = op.result(); 2054 if (err != JVMTI_ERROR_NONE) { 2055 return err; 2056 } else { 2057 *value_ptr = op.value().l; 2058 return JVMTI_ERROR_NONE; 2059 } 2060 } /* end GetLocalInstance */ 2061 2062 2063 // Threads_lock NOT held, java_thread not protected by lock 2064 // java_thread - pre-checked 2065 // java_thread - unchecked 2066 // depth - pre-checked as non-negative 2067 // value_ptr - pre-checked for NULL 2068 jvmtiError 2069 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) { 2070 // rm object is created to clean up the javaVFrame created in 2071 // doit_prologue(), but after doit() is finished with it. 2072 ResourceMark rm; 2073 2074 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT); 2075 VMThread::execute(&op); 2076 *value_ptr = op.value().i; 2077 return op.result(); 2078 } /* end GetLocalInt */ 2079 2080 2081 // Threads_lock NOT held, java_thread not protected by lock 2082 // java_thread - pre-checked 2083 // java_thread - unchecked 2084 // depth - pre-checked as non-negative 2085 // value_ptr - pre-checked for NULL 2086 jvmtiError 2087 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) { 2088 // rm object is created to clean up the javaVFrame created in 2089 // doit_prologue(), but after doit() is finished with it. 2090 ResourceMark rm; 2091 2092 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG); 2093 VMThread::execute(&op); 2094 *value_ptr = op.value().j; 2095 return op.result(); 2096 } /* end GetLocalLong */ 2097 2098 2099 // Threads_lock NOT held, java_thread not protected by lock 2100 // java_thread - pre-checked 2101 // java_thread - unchecked 2102 // depth - pre-checked as non-negative 2103 // value_ptr - pre-checked for NULL 2104 jvmtiError 2105 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) { 2106 // rm object is created to clean up the javaVFrame created in 2107 // doit_prologue(), but after doit() is finished with it. 2108 ResourceMark rm; 2109 2110 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT); 2111 VMThread::execute(&op); 2112 *value_ptr = op.value().f; 2113 return op.result(); 2114 } /* end GetLocalFloat */ 2115 2116 2117 // Threads_lock NOT held, java_thread not protected by lock 2118 // java_thread - pre-checked 2119 // java_thread - unchecked 2120 // depth - pre-checked as non-negative 2121 // value_ptr - pre-checked for NULL 2122 jvmtiError 2123 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) { 2124 // rm object is created to clean up the javaVFrame created in 2125 // doit_prologue(), but after doit() is finished with it. 2126 ResourceMark rm; 2127 2128 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE); 2129 VMThread::execute(&op); 2130 *value_ptr = op.value().d; 2131 return op.result(); 2132 } /* end GetLocalDouble */ 2133 2134 2135 // Threads_lock NOT held, java_thread not protected by lock 2136 // java_thread - pre-checked 2137 // java_thread - unchecked 2138 // depth - pre-checked as non-negative 2139 jvmtiError 2140 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) { 2141 // rm object is created to clean up the javaVFrame created in 2142 // doit_prologue(), but after doit() is finished with it. 2143 ResourceMark rm; 2144 jvalue val; 2145 val.l = value; 2146 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val); 2147 VMThread::execute(&op); 2148 return op.result(); 2149 } /* end SetLocalObject */ 2150 2151 2152 // Threads_lock NOT held, java_thread not protected by lock 2153 // java_thread - pre-checked 2154 // java_thread - unchecked 2155 // depth - pre-checked as non-negative 2156 jvmtiError 2157 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) { 2158 // rm object is created to clean up the javaVFrame created in 2159 // doit_prologue(), but after doit() is finished with it. 2160 ResourceMark rm; 2161 jvalue val; 2162 val.i = value; 2163 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val); 2164 VMThread::execute(&op); 2165 return op.result(); 2166 } /* end SetLocalInt */ 2167 2168 2169 // Threads_lock NOT held, java_thread not protected by lock 2170 // java_thread - pre-checked 2171 // java_thread - unchecked 2172 // depth - pre-checked as non-negative 2173 jvmtiError 2174 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) { 2175 // rm object is created to clean up the javaVFrame created in 2176 // doit_prologue(), but after doit() is finished with it. 2177 ResourceMark rm; 2178 jvalue val; 2179 val.j = value; 2180 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val); 2181 VMThread::execute(&op); 2182 return op.result(); 2183 } /* end SetLocalLong */ 2184 2185 2186 // Threads_lock NOT held, java_thread not protected by lock 2187 // java_thread - pre-checked 2188 // java_thread - unchecked 2189 // depth - pre-checked as non-negative 2190 jvmtiError 2191 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) { 2192 // rm object is created to clean up the javaVFrame created in 2193 // doit_prologue(), but after doit() is finished with it. 2194 ResourceMark rm; 2195 jvalue val; 2196 val.f = value; 2197 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val); 2198 VMThread::execute(&op); 2199 return op.result(); 2200 } /* end SetLocalFloat */ 2201 2202 2203 // Threads_lock NOT held, java_thread not protected by lock 2204 // java_thread - pre-checked 2205 // java_thread - unchecked 2206 // depth - pre-checked as non-negative 2207 jvmtiError 2208 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) { 2209 // rm object is created to clean up the javaVFrame created in 2210 // doit_prologue(), but after doit() is finished with it. 2211 ResourceMark rm; 2212 jvalue val; 2213 val.d = value; 2214 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val); 2215 VMThread::execute(&op); 2216 return op.result(); 2217 } /* end SetLocalDouble */ 2218 2219 2220 // 2221 // Breakpoint functions 2222 // 2223 2224 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2225 jvmtiError 2226 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) { 2227 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2228 if (location < 0) { // simple invalid location check first 2229 return JVMTI_ERROR_INVALID_LOCATION; 2230 } 2231 // verify that the breakpoint is not past the end of the method 2232 if (location >= (jlocation) method_oop->code_size()) { 2233 return JVMTI_ERROR_INVALID_LOCATION; 2234 } 2235 2236 ResourceMark rm; 2237 JvmtiBreakpoint bp(method_oop, location); 2238 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2239 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE) 2240 return JVMTI_ERROR_DUPLICATE; 2241 2242 if (TraceJVMTICalls) { 2243 jvmti_breakpoints.print(); 2244 } 2245 2246 return JVMTI_ERROR_NONE; 2247 } /* end SetBreakpoint */ 2248 2249 2250 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2251 jvmtiError 2252 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) { 2253 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2254 2255 if (location < 0) { // simple invalid location check first 2256 return JVMTI_ERROR_INVALID_LOCATION; 2257 } 2258 2259 // verify that the breakpoint is not past the end of the method 2260 if (location >= (jlocation) method_oop->code_size()) { 2261 return JVMTI_ERROR_INVALID_LOCATION; 2262 } 2263 2264 JvmtiBreakpoint bp(method_oop, location); 2265 2266 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2267 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND) 2268 return JVMTI_ERROR_NOT_FOUND; 2269 2270 if (TraceJVMTICalls) { 2271 jvmti_breakpoints.print(); 2272 } 2273 2274 return JVMTI_ERROR_NONE; 2275 } /* end ClearBreakpoint */ 2276 2277 2278 // 2279 // Watched Field functions 2280 // 2281 2282 jvmtiError 2283 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2284 // make sure we haven't set this watch before 2285 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE; 2286 fdesc_ptr->set_is_field_access_watched(true); 2287 2288 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true); 2289 2290 return JVMTI_ERROR_NONE; 2291 } /* end SetFieldAccessWatch */ 2292 2293 2294 jvmtiError 2295 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2296 // make sure we have a watch to clear 2297 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND; 2298 fdesc_ptr->set_is_field_access_watched(false); 2299 2300 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false); 2301 2302 return JVMTI_ERROR_NONE; 2303 } /* end ClearFieldAccessWatch */ 2304 2305 2306 jvmtiError 2307 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2308 // make sure we haven't set this watch before 2309 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE; 2310 fdesc_ptr->set_is_field_modification_watched(true); 2311 2312 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true); 2313 2314 return JVMTI_ERROR_NONE; 2315 } /* end SetFieldModificationWatch */ 2316 2317 2318 jvmtiError 2319 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2320 // make sure we have a watch to clear 2321 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND; 2322 fdesc_ptr->set_is_field_modification_watched(false); 2323 2324 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false); 2325 2326 return JVMTI_ERROR_NONE; 2327 } /* end ClearFieldModificationWatch */ 2328 2329 // 2330 // Class functions 2331 // 2332 2333 2334 // k_mirror - may be primitive, this must be checked 2335 // signature_ptr - NULL is a valid value, must be checked 2336 // generic_ptr - NULL is a valid value, must be checked 2337 jvmtiError 2338 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) { 2339 ResourceMark rm; 2340 bool isPrimitive = java_lang_Class::is_primitive(k_mirror); 2341 Klass* k = NULL; 2342 if (!isPrimitive) { 2343 k = java_lang_Class::as_Klass(k_mirror); 2344 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2345 } 2346 if (signature_ptr != NULL) { 2347 char* result = NULL; 2348 if (isPrimitive) { 2349 char tchar = type2char(java_lang_Class::primitive_type(k_mirror)); 2350 result = (char*) jvmtiMalloc(2); 2351 result[0] = tchar; 2352 result[1] = '\0'; 2353 } else { 2354 const char* class_sig = k->signature_name(); 2355 result = (char *) jvmtiMalloc(strlen(class_sig)+1); 2356 strcpy(result, class_sig); 2357 } 2358 *signature_ptr = result; 2359 } 2360 if (generic_ptr != NULL) { 2361 *generic_ptr = NULL; 2362 if (!isPrimitive && k->is_instance_klass()) { 2363 Symbol* soo = InstanceKlass::cast(k)->generic_signature(); 2364 if (soo != NULL) { 2365 const char *gen_sig = soo->as_C_string(); 2366 if (gen_sig != NULL) { 2367 char* gen_result; 2368 jvmtiError err = allocate(strlen(gen_sig) + 1, 2369 (unsigned char **)&gen_result); 2370 if (err != JVMTI_ERROR_NONE) { 2371 return err; 2372 } 2373 strcpy(gen_result, gen_sig); 2374 *generic_ptr = gen_result; 2375 } 2376 } 2377 } 2378 } 2379 return JVMTI_ERROR_NONE; 2380 } /* end GetClassSignature */ 2381 2382 2383 // k_mirror - may be primitive, this must be checked 2384 // status_ptr - pre-checked for NULL 2385 jvmtiError 2386 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) { 2387 jint result = 0; 2388 if (java_lang_Class::is_primitive(k_mirror)) { 2389 result |= JVMTI_CLASS_STATUS_PRIMITIVE; 2390 } else { 2391 Klass* k = java_lang_Class::as_Klass(k_mirror); 2392 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2393 result = k->jvmti_class_status(); 2394 } 2395 *status_ptr = result; 2396 2397 return JVMTI_ERROR_NONE; 2398 } /* end GetClassStatus */ 2399 2400 2401 // k_mirror - may be primitive, this must be checked 2402 // source_name_ptr - pre-checked for NULL 2403 jvmtiError 2404 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) { 2405 if (java_lang_Class::is_primitive(k_mirror)) { 2406 return JVMTI_ERROR_ABSENT_INFORMATION; 2407 } 2408 Klass* k_klass = java_lang_Class::as_Klass(k_mirror); 2409 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS); 2410 2411 if (!k_klass->is_instance_klass()) { 2412 return JVMTI_ERROR_ABSENT_INFORMATION; 2413 } 2414 2415 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name(); 2416 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION); 2417 { 2418 JavaThread* current_thread = JavaThread::current(); 2419 ResourceMark rm(current_thread); 2420 const char* sfncp = (const char*) sfnOop->as_C_string(); 2421 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1); 2422 strcpy(*source_name_ptr, sfncp); 2423 } 2424 2425 return JVMTI_ERROR_NONE; 2426 } /* end GetSourceFileName */ 2427 2428 2429 // k_mirror - may be primitive, this must be checked 2430 // modifiers_ptr - pre-checked for NULL 2431 jvmtiError 2432 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) { 2433 JavaThread* current_thread = JavaThread::current(); 2434 jint result = 0; 2435 if (!java_lang_Class::is_primitive(k_mirror)) { 2436 Klass* k = java_lang_Class::as_Klass(k_mirror); 2437 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2438 result = k->compute_modifier_flags(current_thread); 2439 JavaThread* THREAD = current_thread; // pass to macros 2440 if (HAS_PENDING_EXCEPTION) { 2441 CLEAR_PENDING_EXCEPTION; 2442 return JVMTI_ERROR_INTERNAL; 2443 }; 2444 2445 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()). 2446 if(k->is_super()) { 2447 result |= JVM_ACC_SUPER; 2448 } 2449 } else { 2450 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 2451 } 2452 *modifiers_ptr = result; 2453 2454 return JVMTI_ERROR_NONE; 2455 } /* end GetClassModifiers */ 2456 2457 2458 // k_mirror - may be primitive, this must be checked 2459 // method_count_ptr - pre-checked for NULL 2460 // methods_ptr - pre-checked for NULL 2461 jvmtiError 2462 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) { 2463 JavaThread* current_thread = JavaThread::current(); 2464 HandleMark hm(current_thread); 2465 2466 if (java_lang_Class::is_primitive(k_mirror)) { 2467 *method_count_ptr = 0; 2468 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2469 return JVMTI_ERROR_NONE; 2470 } 2471 Klass* k = java_lang_Class::as_Klass(k_mirror); 2472 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2473 2474 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2475 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2476 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2477 } 2478 2479 if (!k->is_instance_klass()) { 2480 *method_count_ptr = 0; 2481 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2482 return JVMTI_ERROR_NONE; 2483 } 2484 InstanceKlass* ik = InstanceKlass::cast(k); 2485 // Allocate the result and fill it in 2486 int result_length = ik->methods()->length(); 2487 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID)); 2488 int index; 2489 bool jmethodids_found = true; 2490 2491 if (JvmtiExport::can_maintain_original_method_order()) { 2492 // Use the original method ordering indices stored in the class, so we can emit 2493 // jmethodIDs in the order they appeared in the class file 2494 for (index = 0; index < result_length; index++) { 2495 Method* m = ik->methods()->at(index); 2496 int original_index = ik->method_ordering()->at(index); 2497 assert(original_index >= 0 && original_index < result_length, "invalid original method index"); 2498 jmethodID id; 2499 if (jmethodids_found) { 2500 id = m->find_jmethod_id_or_null(); 2501 if (id == NULL) { 2502 // If we find an uninitialized value, make sure there is 2503 // enough space for all the uninitialized values we might 2504 // find. 2505 ik->ensure_space_for_methodids(index); 2506 jmethodids_found = false; 2507 id = m->jmethod_id(); 2508 } 2509 } else { 2510 id = m->jmethod_id(); 2511 } 2512 result_list[original_index] = id; 2513 } 2514 } else { 2515 // otherwise just copy in any order 2516 for (index = 0; index < result_length; index++) { 2517 Method* m = ik->methods()->at(index); 2518 jmethodID id; 2519 if (jmethodids_found) { 2520 id = m->find_jmethod_id_or_null(); 2521 if (id == NULL) { 2522 // If we find an uninitialized value, make sure there is 2523 // enough space for all the uninitialized values we might 2524 // find. 2525 ik->ensure_space_for_methodids(index); 2526 jmethodids_found = false; 2527 id = m->jmethod_id(); 2528 } 2529 } else { 2530 id = m->jmethod_id(); 2531 } 2532 result_list[index] = id; 2533 } 2534 } 2535 // Fill in return value. 2536 *method_count_ptr = result_length; 2537 *methods_ptr = result_list; 2538 2539 return JVMTI_ERROR_NONE; 2540 } /* end GetClassMethods */ 2541 2542 2543 // k_mirror - may be primitive, this must be checked 2544 // field_count_ptr - pre-checked for NULL 2545 // fields_ptr - pre-checked for NULL 2546 jvmtiError 2547 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) { 2548 if (java_lang_Class::is_primitive(k_mirror)) { 2549 *field_count_ptr = 0; 2550 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2551 return JVMTI_ERROR_NONE; 2552 } 2553 JavaThread* current_thread = JavaThread::current(); 2554 HandleMark hm(current_thread); 2555 Klass* k = java_lang_Class::as_Klass(k_mirror); 2556 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2557 2558 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2559 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2560 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2561 } 2562 2563 if (!k->is_instance_klass()) { 2564 *field_count_ptr = 0; 2565 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2566 return JVMTI_ERROR_NONE; 2567 } 2568 2569 2570 InstanceKlass* ik = InstanceKlass::cast(k); 2571 2572 int result_count = 0; 2573 // First, count the fields. 2574 FilteredFieldStream flds(ik, true, true); 2575 result_count = flds.field_count(); 2576 2577 // Allocate the result and fill it in 2578 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID)); 2579 // The JVMTI spec requires fields in the order they occur in the class file, 2580 // this is the reverse order of what FieldStream hands out. 2581 int id_index = (result_count - 1); 2582 2583 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) { 2584 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID( 2585 ik, src_st.offset(), 2586 src_st.access_flags().is_static()); 2587 } 2588 assert(id_index == -1, "just checking"); 2589 // Fill in the results 2590 *field_count_ptr = result_count; 2591 *fields_ptr = result_list; 2592 2593 return JVMTI_ERROR_NONE; 2594 } /* end GetClassFields */ 2595 2596 2597 // k_mirror - may be primitive, this must be checked 2598 // interface_count_ptr - pre-checked for NULL 2599 // interfaces_ptr - pre-checked for NULL 2600 jvmtiError 2601 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) { 2602 { 2603 if (java_lang_Class::is_primitive(k_mirror)) { 2604 *interface_count_ptr = 0; 2605 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2606 return JVMTI_ERROR_NONE; 2607 } 2608 JavaThread* current_thread = JavaThread::current(); 2609 HandleMark hm(current_thread); 2610 Klass* k = java_lang_Class::as_Klass(k_mirror); 2611 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2612 2613 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2614 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) 2615 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2616 2617 if (!k->is_instance_klass()) { 2618 *interface_count_ptr = 0; 2619 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2620 return JVMTI_ERROR_NONE; 2621 } 2622 2623 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces(); 2624 const int result_length = (interface_list == NULL ? 0 : interface_list->length()); 2625 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass)); 2626 for (int i_index = 0; i_index < result_length; i_index += 1) { 2627 InstanceKlass* klass_at = interface_list->at(i_index); 2628 assert(klass_at->is_klass(), "interfaces must be Klass*s"); 2629 assert(klass_at->is_interface(), "interfaces must be interfaces"); 2630 oop mirror_at = klass_at->java_mirror(); 2631 Handle handle_at = Handle(current_thread, mirror_at); 2632 result_list[i_index] = (jclass) jni_reference(handle_at); 2633 } 2634 *interface_count_ptr = result_length; 2635 *interfaces_ptr = result_list; 2636 } 2637 2638 return JVMTI_ERROR_NONE; 2639 } /* end GetImplementedInterfaces */ 2640 2641 2642 // k_mirror - may be primitive, this must be checked 2643 // minor_version_ptr - pre-checked for NULL 2644 // major_version_ptr - pre-checked for NULL 2645 jvmtiError 2646 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) { 2647 if (java_lang_Class::is_primitive(k_mirror)) { 2648 return JVMTI_ERROR_ABSENT_INFORMATION; 2649 } 2650 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2651 2652 jint status = klass->jvmti_class_status(); 2653 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2654 return JVMTI_ERROR_INVALID_CLASS; 2655 } 2656 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2657 return JVMTI_ERROR_ABSENT_INFORMATION; 2658 } 2659 2660 InstanceKlass* ik = InstanceKlass::cast(klass); 2661 *minor_version_ptr = ik->minor_version(); 2662 *major_version_ptr = ik->major_version(); 2663 2664 return JVMTI_ERROR_NONE; 2665 } /* end GetClassVersionNumbers */ 2666 2667 2668 // k_mirror - may be primitive, this must be checked 2669 // constant_pool_count_ptr - pre-checked for NULL 2670 // constant_pool_byte_count_ptr - pre-checked for NULL 2671 // constant_pool_bytes_ptr - pre-checked for NULL 2672 jvmtiError 2673 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) { 2674 if (java_lang_Class::is_primitive(k_mirror)) { 2675 return JVMTI_ERROR_ABSENT_INFORMATION; 2676 } 2677 2678 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2679 Thread *thread = Thread::current(); 2680 ResourceMark rm(thread); 2681 2682 jint status = klass->jvmti_class_status(); 2683 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2684 return JVMTI_ERROR_INVALID_CLASS; 2685 } 2686 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2687 return JVMTI_ERROR_ABSENT_INFORMATION; 2688 } 2689 2690 InstanceKlass* ik = InstanceKlass::cast(klass); 2691 JvmtiConstantPoolReconstituter reconstituter(ik); 2692 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2693 return reconstituter.get_error(); 2694 } 2695 2696 unsigned char *cpool_bytes; 2697 int cpool_size = reconstituter.cpool_size(); 2698 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2699 return reconstituter.get_error(); 2700 } 2701 jvmtiError res = allocate(cpool_size, &cpool_bytes); 2702 if (res != JVMTI_ERROR_NONE) { 2703 return res; 2704 } 2705 reconstituter.copy_cpool_bytes(cpool_bytes); 2706 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2707 return reconstituter.get_error(); 2708 } 2709 2710 constantPoolHandle constants(thread, ik->constants()); 2711 *constant_pool_count_ptr = constants->length(); 2712 *constant_pool_byte_count_ptr = cpool_size; 2713 *constant_pool_bytes_ptr = cpool_bytes; 2714 2715 return JVMTI_ERROR_NONE; 2716 } /* end GetConstantPool */ 2717 2718 2719 // k_mirror - may be primitive, this must be checked 2720 // is_interface_ptr - pre-checked for NULL 2721 jvmtiError 2722 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) { 2723 { 2724 bool result = false; 2725 if (!java_lang_Class::is_primitive(k_mirror)) { 2726 Klass* k = java_lang_Class::as_Klass(k_mirror); 2727 if (k != NULL && k->is_interface()) { 2728 result = true; 2729 } 2730 } 2731 *is_interface_ptr = result; 2732 } 2733 2734 return JVMTI_ERROR_NONE; 2735 } /* end IsInterface */ 2736 2737 2738 // k_mirror - may be primitive, this must be checked 2739 // is_array_class_ptr - pre-checked for NULL 2740 jvmtiError 2741 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) { 2742 { 2743 bool result = false; 2744 if (!java_lang_Class::is_primitive(k_mirror)) { 2745 Klass* k = java_lang_Class::as_Klass(k_mirror); 2746 if (k != NULL && k->is_array_klass()) { 2747 result = true; 2748 } 2749 } 2750 *is_array_class_ptr = result; 2751 } 2752 2753 return JVMTI_ERROR_NONE; 2754 } /* end IsArrayClass */ 2755 2756 2757 // k_mirror - may be primitive, this must be checked 2758 // classloader_ptr - pre-checked for NULL 2759 jvmtiError 2760 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) { 2761 { 2762 if (java_lang_Class::is_primitive(k_mirror)) { 2763 *classloader_ptr = (jclass) jni_reference(Handle()); 2764 return JVMTI_ERROR_NONE; 2765 } 2766 JavaThread* current_thread = JavaThread::current(); 2767 HandleMark hm(current_thread); 2768 Klass* k = java_lang_Class::as_Klass(k_mirror); 2769 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2770 2771 oop result_oop = k->class_loader(); 2772 if (result_oop == NULL) { 2773 *classloader_ptr = (jclass) jni_reference(Handle()); 2774 return JVMTI_ERROR_NONE; 2775 } 2776 Handle result_handle = Handle(current_thread, result_oop); 2777 jclass result_jnihandle = (jclass) jni_reference(result_handle); 2778 *classloader_ptr = result_jnihandle; 2779 } 2780 return JVMTI_ERROR_NONE; 2781 } /* end GetClassLoader */ 2782 2783 2784 // k_mirror - may be primitive, this must be checked 2785 // source_debug_extension_ptr - pre-checked for NULL 2786 jvmtiError 2787 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) { 2788 { 2789 if (java_lang_Class::is_primitive(k_mirror)) { 2790 return JVMTI_ERROR_ABSENT_INFORMATION; 2791 } 2792 Klass* k = java_lang_Class::as_Klass(k_mirror); 2793 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2794 if (!k->is_instance_klass()) { 2795 return JVMTI_ERROR_ABSENT_INFORMATION; 2796 } 2797 const char* sde = InstanceKlass::cast(k)->source_debug_extension(); 2798 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION); 2799 2800 { 2801 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1); 2802 strcpy(*source_debug_extension_ptr, sde); 2803 } 2804 } 2805 2806 return JVMTI_ERROR_NONE; 2807 } /* end GetSourceDebugExtension */ 2808 2809 // 2810 // Object functions 2811 // 2812 2813 // hash_code_ptr - pre-checked for NULL 2814 jvmtiError 2815 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) { 2816 oop mirror = JNIHandles::resolve_external_guard(object); 2817 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 2818 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER); 2819 2820 { 2821 jint result = (jint) mirror->identity_hash(); 2822 *hash_code_ptr = result; 2823 } 2824 return JVMTI_ERROR_NONE; 2825 } /* end GetObjectHashCode */ 2826 2827 2828 // info_ptr - pre-checked for NULL 2829 jvmtiError 2830 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) { 2831 JavaThread* calling_thread = JavaThread::current(); 2832 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr); 2833 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) { 2834 // Some of the critical threads were not suspended. go to a safepoint and try again 2835 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr); 2836 VMThread::execute(&op); 2837 err = op.result(); 2838 } 2839 return err; 2840 } /* end GetObjectMonitorUsage */ 2841 2842 2843 // 2844 // Field functions 2845 // 2846 2847 // name_ptr - NULL is a valid value, must be checked 2848 // signature_ptr - NULL is a valid value, must be checked 2849 // generic_ptr - NULL is a valid value, must be checked 2850 jvmtiError 2851 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2852 JavaThread* current_thread = JavaThread::current(); 2853 ResourceMark rm(current_thread); 2854 if (name_ptr == NULL) { 2855 // just don't return the name 2856 } else { 2857 const char* fieldName = fdesc_ptr->name()->as_C_string(); 2858 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1); 2859 if (*name_ptr == NULL) 2860 return JVMTI_ERROR_OUT_OF_MEMORY; 2861 strcpy(*name_ptr, fieldName); 2862 } 2863 if (signature_ptr== NULL) { 2864 // just don't return the signature 2865 } else { 2866 const char* fieldSignature = fdesc_ptr->signature()->as_C_string(); 2867 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1); 2868 if (*signature_ptr == NULL) 2869 return JVMTI_ERROR_OUT_OF_MEMORY; 2870 strcpy(*signature_ptr, fieldSignature); 2871 } 2872 if (generic_ptr != NULL) { 2873 *generic_ptr = NULL; 2874 Symbol* soop = fdesc_ptr->generic_signature(); 2875 if (soop != NULL) { 2876 const char* gen_sig = soop->as_C_string(); 2877 if (gen_sig != NULL) { 2878 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2879 if (err != JVMTI_ERROR_NONE) { 2880 return err; 2881 } 2882 strcpy(*generic_ptr, gen_sig); 2883 } 2884 } 2885 } 2886 return JVMTI_ERROR_NONE; 2887 } /* end GetFieldName */ 2888 2889 2890 // declaring_class_ptr - pre-checked for NULL 2891 jvmtiError 2892 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) { 2893 2894 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder()); 2895 return JVMTI_ERROR_NONE; 2896 } /* end GetFieldDeclaringClass */ 2897 2898 2899 // modifiers_ptr - pre-checked for NULL 2900 jvmtiError 2901 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) { 2902 2903 AccessFlags resultFlags = fdesc_ptr->access_flags(); 2904 jint result = resultFlags.as_int(); 2905 *modifiers_ptr = result; 2906 2907 return JVMTI_ERROR_NONE; 2908 } /* end GetFieldModifiers */ 2909 2910 2911 // is_synthetic_ptr - pre-checked for NULL 2912 jvmtiError 2913 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) { 2914 *is_synthetic_ptr = fdesc_ptr->is_synthetic(); 2915 return JVMTI_ERROR_NONE; 2916 } /* end IsFieldSynthetic */ 2917 2918 2919 // 2920 // Method functions 2921 // 2922 2923 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2924 // name_ptr - NULL is a valid value, must be checked 2925 // signature_ptr - NULL is a valid value, must be checked 2926 // generic_ptr - NULL is a valid value, must be checked 2927 jvmtiError 2928 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2929 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2930 JavaThread* current_thread = JavaThread::current(); 2931 2932 ResourceMark rm(current_thread); // get the utf8 name and signature 2933 if (name_ptr == NULL) { 2934 // just don't return the name 2935 } else { 2936 const char* utf8_name = (const char *) method_oop->name()->as_utf8(); 2937 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1); 2938 strcpy(*name_ptr, utf8_name); 2939 } 2940 if (signature_ptr == NULL) { 2941 // just don't return the signature 2942 } else { 2943 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8(); 2944 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1); 2945 strcpy(*signature_ptr, utf8_signature); 2946 } 2947 2948 if (generic_ptr != NULL) { 2949 *generic_ptr = NULL; 2950 Symbol* soop = method_oop->generic_signature(); 2951 if (soop != NULL) { 2952 const char* gen_sig = soop->as_C_string(); 2953 if (gen_sig != NULL) { 2954 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2955 if (err != JVMTI_ERROR_NONE) { 2956 return err; 2957 } 2958 strcpy(*generic_ptr, gen_sig); 2959 } 2960 } 2961 } 2962 return JVMTI_ERROR_NONE; 2963 } /* end GetMethodName */ 2964 2965 2966 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2967 // declaring_class_ptr - pre-checked for NULL 2968 jvmtiError 2969 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) { 2970 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2971 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder()); 2972 return JVMTI_ERROR_NONE; 2973 } /* end GetMethodDeclaringClass */ 2974 2975 2976 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2977 // modifiers_ptr - pre-checked for NULL 2978 jvmtiError 2979 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) { 2980 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2981 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2982 return JVMTI_ERROR_NONE; 2983 } /* end GetMethodModifiers */ 2984 2985 2986 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2987 // max_ptr - pre-checked for NULL 2988 jvmtiError 2989 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) { 2990 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2991 // get max stack 2992 (*max_ptr) = method_oop->max_locals(); 2993 return JVMTI_ERROR_NONE; 2994 } /* end GetMaxLocals */ 2995 2996 2997 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2998 // size_ptr - pre-checked for NULL 2999 jvmtiError 3000 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) { 3001 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3002 // get size of arguments 3003 3004 (*size_ptr) = method_oop->size_of_parameters(); 3005 return JVMTI_ERROR_NONE; 3006 } /* end GetArgumentsSize */ 3007 3008 3009 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3010 // entry_count_ptr - pre-checked for NULL 3011 // table_ptr - pre-checked for NULL 3012 jvmtiError 3013 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) { 3014 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3015 if (!method_oop->has_linenumber_table()) { 3016 return (JVMTI_ERROR_ABSENT_INFORMATION); 3017 } 3018 3019 // The line number table is compressed so we don't know how big it is until decompressed. 3020 // Decompression is really fast so we just do it twice. 3021 3022 // Compute size of table 3023 jint num_entries = 0; 3024 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 3025 while (stream.read_pair()) { 3026 num_entries++; 3027 } 3028 jvmtiLineNumberEntry *jvmti_table = 3029 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry))); 3030 3031 // Fill jvmti table 3032 if (num_entries > 0) { 3033 int index = 0; 3034 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 3035 while (stream.read_pair()) { 3036 jvmti_table[index].start_location = (jlocation) stream.bci(); 3037 jvmti_table[index].line_number = (jint) stream.line(); 3038 index++; 3039 } 3040 assert(index == num_entries, "sanity check"); 3041 } 3042 3043 // Set up results 3044 (*entry_count_ptr) = num_entries; 3045 (*table_ptr) = jvmti_table; 3046 3047 return JVMTI_ERROR_NONE; 3048 } /* end GetLineNumberTable */ 3049 3050 3051 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3052 // start_location_ptr - pre-checked for NULL 3053 // end_location_ptr - pre-checked for NULL 3054 jvmtiError 3055 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) { 3056 3057 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3058 // get start and end location 3059 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1); 3060 if (method_oop->code_size() == 0) { 3061 // there is no code so there is no start location 3062 (*start_location_ptr) = (jlocation)(-1); 3063 } else { 3064 (*start_location_ptr) = (jlocation)(0); 3065 } 3066 3067 return JVMTI_ERROR_NONE; 3068 } /* end GetMethodLocation */ 3069 3070 3071 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3072 // entry_count_ptr - pre-checked for NULL 3073 // table_ptr - pre-checked for NULL 3074 jvmtiError 3075 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) { 3076 3077 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3078 JavaThread* current_thread = JavaThread::current(); 3079 3080 // does the klass have any local variable information? 3081 InstanceKlass* ik = method_oop->method_holder(); 3082 if (!ik->access_flags().has_localvariable_table()) { 3083 return (JVMTI_ERROR_ABSENT_INFORMATION); 3084 } 3085 3086 ConstantPool* constants = method_oop->constants(); 3087 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION); 3088 3089 // in the vm localvariable table representation, 6 consecutive elements in the table 3090 // represent a 6-tuple of shorts 3091 // [start_pc, length, name_index, descriptor_index, signature_index, index] 3092 jint num_entries = method_oop->localvariable_table_length(); 3093 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *) 3094 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry))); 3095 3096 if (num_entries > 0) { 3097 LocalVariableTableElement* table = method_oop->localvariable_table_start(); 3098 for (int i = 0; i < num_entries; i++) { 3099 // get the 5 tuple information from the vm table 3100 jlocation start_location = (jlocation) table[i].start_bci; 3101 jint length = (jint) table[i].length; 3102 int name_index = (int) table[i].name_cp_index; 3103 int signature_index = (int) table[i].descriptor_cp_index; 3104 int generic_signature_index = (int) table[i].signature_cp_index; 3105 jint slot = (jint) table[i].slot; 3106 3107 // get utf8 name and signature 3108 char *name_buf = NULL; 3109 char *sig_buf = NULL; 3110 char *gen_sig_buf = NULL; 3111 { 3112 ResourceMark rm(current_thread); 3113 3114 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8(); 3115 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1); 3116 strcpy(name_buf, utf8_name); 3117 3118 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8(); 3119 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1); 3120 strcpy(sig_buf, utf8_signature); 3121 3122 if (generic_signature_index > 0) { 3123 const char *utf8_gen_sign = (const char *) 3124 constants->symbol_at(generic_signature_index)->as_utf8(); 3125 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1); 3126 strcpy(gen_sig_buf, utf8_gen_sign); 3127 } 3128 } 3129 3130 // fill in the jvmti local variable table 3131 jvmti_table[i].start_location = start_location; 3132 jvmti_table[i].length = length; 3133 jvmti_table[i].name = name_buf; 3134 jvmti_table[i].signature = sig_buf; 3135 jvmti_table[i].generic_signature = gen_sig_buf; 3136 jvmti_table[i].slot = slot; 3137 } 3138 } 3139 3140 // set results 3141 (*entry_count_ptr) = num_entries; 3142 (*table_ptr) = jvmti_table; 3143 3144 return JVMTI_ERROR_NONE; 3145 } /* end GetLocalVariableTable */ 3146 3147 3148 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3149 // bytecode_count_ptr - pre-checked for NULL 3150 // bytecodes_ptr - pre-checked for NULL 3151 jvmtiError 3152 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) { 3153 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3154 3155 HandleMark hm; 3156 methodHandle method(method_oop); 3157 jint size = (jint)method->code_size(); 3158 jvmtiError err = allocate(size, bytecodes_ptr); 3159 if (err != JVMTI_ERROR_NONE) { 3160 return err; 3161 } 3162 3163 (*bytecode_count_ptr) = size; 3164 // get byte codes 3165 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr); 3166 3167 return JVMTI_ERROR_NONE; 3168 } /* end GetBytecodes */ 3169 3170 3171 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3172 // is_native_ptr - pre-checked for NULL 3173 jvmtiError 3174 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) { 3175 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3176 (*is_native_ptr) = method_oop->is_native(); 3177 return JVMTI_ERROR_NONE; 3178 } /* end IsMethodNative */ 3179 3180 3181 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3182 // is_synthetic_ptr - pre-checked for NULL 3183 jvmtiError 3184 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) { 3185 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3186 (*is_synthetic_ptr) = method_oop->is_synthetic(); 3187 return JVMTI_ERROR_NONE; 3188 } /* end IsMethodSynthetic */ 3189 3190 3191 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3192 // is_obsolete_ptr - pre-checked for NULL 3193 jvmtiError 3194 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) { 3195 if (use_version_1_0_semantics() && 3196 get_capabilities()->can_redefine_classes == 0) { 3197 // This JvmtiEnv requested version 1.0 semantics and this function 3198 // requires the can_redefine_classes capability in version 1.0 so 3199 // we need to return an error here. 3200 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3201 } 3202 3203 if (method_oop == NULL || method_oop->is_obsolete()) { 3204 *is_obsolete_ptr = true; 3205 } else { 3206 *is_obsolete_ptr = false; 3207 } 3208 return JVMTI_ERROR_NONE; 3209 } /* end IsMethodObsolete */ 3210 3211 // 3212 // Raw Monitor functions 3213 // 3214 3215 // name - pre-checked for NULL 3216 // monitor_ptr - pre-checked for NULL 3217 jvmtiError 3218 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) { 3219 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name); 3220 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY); 3221 3222 *monitor_ptr = (jrawMonitorID)rmonitor; 3223 3224 return JVMTI_ERROR_NONE; 3225 } /* end CreateRawMonitor */ 3226 3227 3228 // rmonitor - pre-checked for validity 3229 jvmtiError 3230 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) { 3231 if (Threads::number_of_threads() == 0) { 3232 // Remove this monitor from pending raw monitors list 3233 // if it has entered in onload or start phase. 3234 JvmtiPendingMonitors::destroy(rmonitor); 3235 } else { 3236 Thread* thread = Thread::current(); 3237 if (rmonitor->is_entered(thread)) { 3238 // The caller owns this monitor which we are about to destroy. 3239 // We exit the underlying synchronization object so that the 3240 // "delete monitor" call below can work without an assertion 3241 // failure on systems that don't like destroying synchronization 3242 // objects that are locked. 3243 int r; 3244 intptr_t recursion = rmonitor->recursions(); 3245 for (intptr_t i = 0; i <= recursion; i++) { 3246 r = rmonitor->raw_exit(thread); 3247 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 3248 if (r != ObjectMonitor::OM_OK) { // robustness 3249 return JVMTI_ERROR_INTERNAL; 3250 } 3251 } 3252 } 3253 if (rmonitor->owner() != NULL) { 3254 // The caller is trying to destroy a monitor that is locked by 3255 // someone else. While this is not forbidden by the JVMTI 3256 // spec, it will cause an assertion failure on systems that don't 3257 // like destroying synchronization objects that are locked. 3258 // We indicate a problem with the error return (and leak the 3259 // monitor's memory). 3260 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3261 } 3262 } 3263 3264 delete rmonitor; 3265 3266 return JVMTI_ERROR_NONE; 3267 } /* end DestroyRawMonitor */ 3268 3269 3270 // rmonitor - pre-checked for validity 3271 jvmtiError 3272 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) { 3273 if (Threads::number_of_threads() == 0) { 3274 // No JavaThreads exist so ObjectMonitor enter cannot be 3275 // used, add this raw monitor to the pending list. 3276 // The pending monitors will be actually entered when 3277 // the VM is setup. 3278 // See transition_pending_raw_monitors in create_vm() 3279 // in thread.cpp. 3280 JvmtiPendingMonitors::enter(rmonitor); 3281 } else { 3282 int r = 0; 3283 Thread* thread = Thread::current(); 3284 3285 if (thread->is_Java_thread()) { 3286 JavaThread* current_thread = (JavaThread*)thread; 3287 3288 #ifdef PROPER_TRANSITIONS 3289 // Not really unknown but ThreadInVMfromNative does more than we want 3290 ThreadInVMfromUnknown __tiv; 3291 { 3292 ThreadBlockInVM __tbivm(current_thread); 3293 r = rmonitor->raw_enter(current_thread); 3294 } 3295 #else 3296 /* Transition to thread_blocked without entering vm state */ 3297 /* This is really evil. Normally you can't undo _thread_blocked */ 3298 /* transitions like this because it would cause us to miss a */ 3299 /* safepoint but since the thread was already in _thread_in_native */ 3300 /* the thread is not leaving a safepoint safe state and it will */ 3301 /* block when it tries to return from native. We can't safepoint */ 3302 /* block in here because we could deadlock the vmthread. Blech. */ 3303 3304 JavaThreadState state = current_thread->thread_state(); 3305 assert(state == _thread_in_native, "Must be _thread_in_native"); 3306 // frame should already be walkable since we are in native 3307 assert(!current_thread->has_last_Java_frame() || 3308 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3309 current_thread->set_thread_state(_thread_blocked); 3310 3311 r = rmonitor->raw_enter(current_thread); 3312 // restore state, still at a safepoint safe state 3313 current_thread->set_thread_state(state); 3314 3315 #endif /* PROPER_TRANSITIONS */ 3316 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked"); 3317 } else { 3318 if (thread->is_Named_thread()) { 3319 r = rmonitor->raw_enter(thread); 3320 } else { 3321 ShouldNotReachHere(); 3322 } 3323 } 3324 3325 if (r != ObjectMonitor::OM_OK) { // robustness 3326 return JVMTI_ERROR_INTERNAL; 3327 } 3328 } 3329 return JVMTI_ERROR_NONE; 3330 } /* end RawMonitorEnter */ 3331 3332 3333 // rmonitor - pre-checked for validity 3334 jvmtiError 3335 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) { 3336 jvmtiError err = JVMTI_ERROR_NONE; 3337 3338 if (Threads::number_of_threads() == 0) { 3339 // No JavaThreads exist so just remove this monitor from the pending list. 3340 // Bool value from exit is false if rmonitor is not in the list. 3341 if (!JvmtiPendingMonitors::exit(rmonitor)) { 3342 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3343 } 3344 } else { 3345 int r = 0; 3346 Thread* thread = Thread::current(); 3347 3348 if (thread->is_Java_thread()) { 3349 JavaThread* current_thread = (JavaThread*)thread; 3350 #ifdef PROPER_TRANSITIONS 3351 // Not really unknown but ThreadInVMfromNative does more than we want 3352 ThreadInVMfromUnknown __tiv; 3353 #endif /* PROPER_TRANSITIONS */ 3354 r = rmonitor->raw_exit(current_thread); 3355 } else { 3356 if (thread->is_Named_thread()) { 3357 r = rmonitor->raw_exit(thread); 3358 } else { 3359 ShouldNotReachHere(); 3360 } 3361 } 3362 3363 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3364 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3365 } else { 3366 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 3367 if (r != ObjectMonitor::OM_OK) { // robustness 3368 err = JVMTI_ERROR_INTERNAL; 3369 } 3370 } 3371 } 3372 return err; 3373 } /* end RawMonitorExit */ 3374 3375 3376 // rmonitor - pre-checked for validity 3377 jvmtiError 3378 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) { 3379 int r = 0; 3380 Thread* thread = Thread::current(); 3381 3382 if (thread->is_Java_thread()) { 3383 JavaThread* current_thread = (JavaThread*)thread; 3384 #ifdef PROPER_TRANSITIONS 3385 // Not really unknown but ThreadInVMfromNative does more than we want 3386 ThreadInVMfromUnknown __tiv; 3387 { 3388 ThreadBlockInVM __tbivm(current_thread); 3389 r = rmonitor->raw_wait(millis, true, current_thread); 3390 } 3391 #else 3392 /* Transition to thread_blocked without entering vm state */ 3393 /* This is really evil. Normally you can't undo _thread_blocked */ 3394 /* transitions like this because it would cause us to miss a */ 3395 /* safepoint but since the thread was already in _thread_in_native */ 3396 /* the thread is not leaving a safepoint safe state and it will */ 3397 /* block when it tries to return from native. We can't safepoint */ 3398 /* block in here because we could deadlock the vmthread. Blech. */ 3399 3400 JavaThreadState state = current_thread->thread_state(); 3401 assert(state == _thread_in_native, "Must be _thread_in_native"); 3402 // frame should already be walkable since we are in native 3403 assert(!current_thread->has_last_Java_frame() || 3404 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3405 current_thread->set_thread_state(_thread_blocked); 3406 3407 r = rmonitor->raw_wait(millis, true, current_thread); 3408 // restore state, still at a safepoint safe state 3409 current_thread->set_thread_state(state); 3410 3411 #endif /* PROPER_TRANSITIONS */ 3412 } else { 3413 if (thread->is_Named_thread()) { 3414 r = rmonitor->raw_wait(millis, true, thread); 3415 } else { 3416 ShouldNotReachHere(); 3417 } 3418 } 3419 3420 switch (r) { 3421 case ObjectMonitor::OM_INTERRUPTED: 3422 return JVMTI_ERROR_INTERRUPT; 3423 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE: 3424 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3425 } 3426 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked"); 3427 if (r != ObjectMonitor::OM_OK) { // robustness 3428 return JVMTI_ERROR_INTERNAL; 3429 } 3430 3431 return JVMTI_ERROR_NONE; 3432 } /* end RawMonitorWait */ 3433 3434 3435 // rmonitor - pre-checked for validity 3436 jvmtiError 3437 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) { 3438 int r = 0; 3439 Thread* thread = Thread::current(); 3440 3441 if (thread->is_Java_thread()) { 3442 JavaThread* current_thread = (JavaThread*)thread; 3443 // Not really unknown but ThreadInVMfromNative does more than we want 3444 ThreadInVMfromUnknown __tiv; 3445 r = rmonitor->raw_notify(current_thread); 3446 } else { 3447 if (thread->is_Named_thread()) { 3448 r = rmonitor->raw_notify(thread); 3449 } else { 3450 ShouldNotReachHere(); 3451 } 3452 } 3453 3454 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3455 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3456 } 3457 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked"); 3458 if (r != ObjectMonitor::OM_OK) { // robustness 3459 return JVMTI_ERROR_INTERNAL; 3460 } 3461 3462 return JVMTI_ERROR_NONE; 3463 } /* end RawMonitorNotify */ 3464 3465 3466 // rmonitor - pre-checked for validity 3467 jvmtiError 3468 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) { 3469 int r = 0; 3470 Thread* thread = Thread::current(); 3471 3472 if (thread->is_Java_thread()) { 3473 JavaThread* current_thread = (JavaThread*)thread; 3474 ThreadInVMfromUnknown __tiv; 3475 r = rmonitor->raw_notifyAll(current_thread); 3476 } else { 3477 if (thread->is_Named_thread()) { 3478 r = rmonitor->raw_notifyAll(thread); 3479 } else { 3480 ShouldNotReachHere(); 3481 } 3482 } 3483 3484 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3485 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3486 } 3487 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked"); 3488 if (r != ObjectMonitor::OM_OK) { // robustness 3489 return JVMTI_ERROR_INTERNAL; 3490 } 3491 3492 return JVMTI_ERROR_NONE; 3493 } /* end RawMonitorNotifyAll */ 3494 3495 3496 // 3497 // JNI Function Interception functions 3498 // 3499 3500 3501 // function_table - pre-checked for NULL 3502 jvmtiError 3503 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) { 3504 // Copy jni function table at safepoint. 3505 VM_JNIFunctionTableCopier copier(function_table); 3506 VMThread::execute(&copier); 3507 3508 return JVMTI_ERROR_NONE; 3509 } /* end SetJNIFunctionTable */ 3510 3511 3512 // function_table - pre-checked for NULL 3513 jvmtiError 3514 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) { 3515 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface)); 3516 if (*function_table == NULL) 3517 return JVMTI_ERROR_OUT_OF_MEMORY; 3518 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface)); 3519 return JVMTI_ERROR_NONE; 3520 } /* end GetJNIFunctionTable */ 3521 3522 3523 // 3524 // Event Management functions 3525 // 3526 3527 jvmtiError 3528 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) { 3529 // can only generate two event types 3530 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD && 3531 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) { 3532 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3533 } 3534 3535 // for compiled_method_load events we must check that the environment 3536 // has the can_generate_compiled_method_load_events capability. 3537 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) { 3538 if (get_capabilities()->can_generate_compiled_method_load_events == 0) { 3539 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3540 } 3541 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this); 3542 } else { 3543 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this); 3544 } 3545 3546 } /* end GenerateEvents */ 3547 3548 3549 // 3550 // Extension Mechanism functions 3551 // 3552 3553 // extension_count_ptr - pre-checked for NULL 3554 // extensions - pre-checked for NULL 3555 jvmtiError 3556 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) { 3557 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions); 3558 } /* end GetExtensionFunctions */ 3559 3560 3561 // extension_count_ptr - pre-checked for NULL 3562 // extensions - pre-checked for NULL 3563 jvmtiError 3564 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) { 3565 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions); 3566 } /* end GetExtensionEvents */ 3567 3568 3569 // callback - NULL is a valid value, must be checked 3570 jvmtiError 3571 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) { 3572 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback); 3573 } /* end SetExtensionEventCallback */ 3574 3575 // 3576 // Timers functions 3577 // 3578 3579 // info_ptr - pre-checked for NULL 3580 jvmtiError 3581 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3582 os::current_thread_cpu_time_info(info_ptr); 3583 return JVMTI_ERROR_NONE; 3584 } /* end GetCurrentThreadCpuTimerInfo */ 3585 3586 3587 // nanos_ptr - pre-checked for NULL 3588 jvmtiError 3589 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) { 3590 *nanos_ptr = os::current_thread_cpu_time(); 3591 return JVMTI_ERROR_NONE; 3592 } /* end GetCurrentThreadCpuTime */ 3593 3594 3595 // info_ptr - pre-checked for NULL 3596 jvmtiError 3597 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3598 os::thread_cpu_time_info(info_ptr); 3599 return JVMTI_ERROR_NONE; 3600 } /* end GetThreadCpuTimerInfo */ 3601 3602 3603 // Threads_lock NOT held, java_thread not protected by lock 3604 // java_thread - pre-checked 3605 // nanos_ptr - pre-checked for NULL 3606 jvmtiError 3607 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) { 3608 *nanos_ptr = os::thread_cpu_time(java_thread); 3609 return JVMTI_ERROR_NONE; 3610 } /* end GetThreadCpuTime */ 3611 3612 3613 // info_ptr - pre-checked for NULL 3614 jvmtiError 3615 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) { 3616 os::javaTimeNanos_info(info_ptr); 3617 return JVMTI_ERROR_NONE; 3618 } /* end GetTimerInfo */ 3619 3620 3621 // nanos_ptr - pre-checked for NULL 3622 jvmtiError 3623 JvmtiEnv::GetTime(jlong* nanos_ptr) { 3624 *nanos_ptr = os::javaTimeNanos(); 3625 return JVMTI_ERROR_NONE; 3626 } /* end GetTime */ 3627 3628 3629 // processor_count_ptr - pre-checked for NULL 3630 jvmtiError 3631 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) { 3632 *processor_count_ptr = os::active_processor_count(); 3633 return JVMTI_ERROR_NONE; 3634 } /* end GetAvailableProcessors */ 3635 3636 jvmtiError 3637 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) { 3638 if (sampling_interval < 0) { 3639 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3640 } 3641 ThreadHeapSampler::set_sampling_interval(sampling_interval); 3642 return JVMTI_ERROR_NONE; 3643 } /* end SetHeapSamplingInterval */ 3644 3645 // 3646 // System Properties functions 3647 // 3648 3649 // count_ptr - pre-checked for NULL 3650 // property_ptr - pre-checked for NULL 3651 jvmtiError 3652 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) { 3653 jvmtiError err = JVMTI_ERROR_NONE; 3654 3655 // Get the number of readable properties. 3656 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties()); 3657 3658 // Allocate memory to hold the exact number of readable properties. 3659 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr); 3660 if (err != JVMTI_ERROR_NONE) { 3661 return err; 3662 } 3663 int readable_count = 0; 3664 // Loop through the system properties until all the readable properties are found. 3665 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) { 3666 if (p->is_readable()) { 3667 const char *key = p->key(); 3668 char **tmp_value = *property_ptr+readable_count; 3669 readable_count++; 3670 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value); 3671 if (err == JVMTI_ERROR_NONE) { 3672 strcpy(*tmp_value, key); 3673 } else { 3674 // clean up previously allocated memory. 3675 for (int j = 0; j < readable_count; j++) { 3676 Deallocate((unsigned char*)*property_ptr+j); 3677 } 3678 Deallocate((unsigned char*)property_ptr); 3679 break; 3680 } 3681 } 3682 } 3683 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count"); 3684 return err; 3685 } /* end GetSystemProperties */ 3686 3687 3688 // property - pre-checked for NULL 3689 // value_ptr - pre-checked for NULL 3690 jvmtiError 3691 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) { 3692 jvmtiError err = JVMTI_ERROR_NONE; 3693 const char *value; 3694 3695 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist. 3696 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property); 3697 if (value == NULL) { 3698 err = JVMTI_ERROR_NOT_AVAILABLE; 3699 } else { 3700 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr); 3701 if (err == JVMTI_ERROR_NONE) { 3702 strcpy(*value_ptr, value); 3703 } 3704 } 3705 return err; 3706 } /* end GetSystemProperty */ 3707 3708 3709 // property - pre-checked for NULL 3710 // value - NULL is a valid value, must be checked 3711 jvmtiError 3712 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) { 3713 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE; 3714 3715 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 3716 if (strcmp(property, p->key()) == 0) { 3717 if (p->set_writeable_value(value_ptr)) { 3718 err = JVMTI_ERROR_NONE; 3719 } 3720 } 3721 } 3722 return err; 3723 } /* end SetSystemProperty */