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