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