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)Universe::heap()->obj_size(mirror) * 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; 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 HandleMark hm; 701 702 // create the zip entry (which will open the zip file and hence 703 // check that the segment is indeed a zip file). 704 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false); 705 if (zip_entry == NULL) { 706 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 707 } 708 delete zip_entry; // no longer needed 709 710 // lock the loader 711 Thread* THREAD = Thread::current(); 712 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 713 714 ObjectLocker ol(loader, THREAD); 715 716 // need the path as java.lang.String 717 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD); 718 if (HAS_PENDING_EXCEPTION) { 719 CLEAR_PENDING_EXCEPTION; 720 return JVMTI_ERROR_INTERNAL; 721 } 722 723 // Invoke the appendToClassPathForInstrumentation method - if the method 724 // is not found it means the loader doesn't support adding to the class path 725 // in the live phase. 726 { 727 JavaValue res(T_VOID); 728 JavaCalls::call_special(&res, 729 loader, 730 loader->klass(), 731 vmSymbols::appendToClassPathForInstrumentation_name(), 732 vmSymbols::appendToClassPathForInstrumentation_signature(), 733 path, 734 THREAD); 735 if (HAS_PENDING_EXCEPTION) { 736 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 737 CLEAR_PENDING_EXCEPTION; 738 739 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) { 740 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED; 741 } else { 742 return JVMTI_ERROR_INTERNAL; 743 } 744 } 745 } 746 747 return JVMTI_ERROR_NONE; 748 } else { 749 return JVMTI_ERROR_WRONG_PHASE; 750 } 751 } /* end AddToSystemClassLoaderSearch */ 752 753 // 754 // General functions 755 // 756 757 // phase_ptr - pre-checked for NULL 758 jvmtiError 759 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) { 760 *phase_ptr = phase(); 761 return JVMTI_ERROR_NONE; 762 } /* end GetPhase */ 763 764 765 jvmtiError 766 JvmtiEnv::DisposeEnvironment() { 767 dispose(); 768 return JVMTI_ERROR_NONE; 769 } /* end DisposeEnvironment */ 770 771 772 // data - NULL is a valid value, must be checked 773 jvmtiError 774 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) { 775 set_env_local_storage(data); 776 return JVMTI_ERROR_NONE; 777 } /* end SetEnvironmentLocalStorage */ 778 779 780 // data_ptr - pre-checked for NULL 781 jvmtiError 782 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) { 783 *data_ptr = (void*)get_env_local_storage(); 784 return JVMTI_ERROR_NONE; 785 } /* end GetEnvironmentLocalStorage */ 786 787 // version_ptr - pre-checked for NULL 788 jvmtiError 789 JvmtiEnv::GetVersionNumber(jint* version_ptr) { 790 *version_ptr = JVMTI_VERSION; 791 return JVMTI_ERROR_NONE; 792 } /* end GetVersionNumber */ 793 794 795 // name_ptr - pre-checked for NULL 796 jvmtiError 797 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) { 798 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) { 799 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 800 } 801 const char *name = JvmtiUtil::error_name(error); 802 if (name == NULL) { 803 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 804 } 805 size_t len = strlen(name) + 1; 806 jvmtiError err = allocate(len, (unsigned char**)name_ptr); 807 if (err == JVMTI_ERROR_NONE) { 808 memcpy(*name_ptr, name, len); 809 } 810 return err; 811 } /* end GetErrorName */ 812 813 814 jvmtiError 815 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) { 816 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info; 817 switch (flag) { 818 case JVMTI_VERBOSE_OTHER: 819 // ignore 820 break; 821 case JVMTI_VERBOSE_CLASS: 822 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload)); 823 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load)); 824 break; 825 case JVMTI_VERBOSE_GC: 826 LogConfiguration::configure_stdout(level, true, LOG_TAGS(gc)); 827 break; 828 case JVMTI_VERBOSE_JNI: 829 level = value == 0 ? LogLevel::Off : LogLevel::Debug; 830 LogConfiguration::configure_stdout(level, true, LOG_TAGS(jni, resolve)); 831 break; 832 default: 833 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 834 }; 835 return JVMTI_ERROR_NONE; 836 } /* end SetVerboseFlag */ 837 838 839 // format_ptr - pre-checked for NULL 840 jvmtiError 841 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) { 842 *format_ptr = JVMTI_JLOCATION_JVMBCI; 843 return JVMTI_ERROR_NONE; 844 } /* end GetJLocationFormat */ 845 846 // 847 // Thread functions 848 // 849 850 // Threads_lock NOT held 851 // thread - NOT pre-checked 852 // thread_state_ptr - pre-checked for NULL 853 jvmtiError 854 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) { 855 JavaThread* current_thread = JavaThread::current(); 856 JavaThread* java_thread = NULL; 857 oop thread_oop = NULL; 858 ThreadsListHandle tlh(current_thread); 859 860 if (thread == NULL) { 861 java_thread = current_thread; 862 thread_oop = java_thread->threadObj(); 863 864 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 865 return JVMTI_ERROR_INVALID_THREAD; 866 } 867 } else { 868 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 869 if (err != JVMTI_ERROR_NONE) { 870 // We got an error code so we don't have a JavaThread *, but 871 // only return an error from here if we didn't get a valid 872 // thread_oop. 873 if (thread_oop == NULL) { 874 return err; 875 } 876 // We have a valid thread_oop so we can return some thread state. 877 } 878 } 879 880 // get most state bits 881 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop); 882 883 if (java_thread != NULL) { 884 // We have a JavaThread* so add more state bits. 885 JavaThreadState jts = java_thread->thread_state(); 886 887 if (java_thread->is_being_ext_suspended()) { 888 state |= JVMTI_THREAD_STATE_SUSPENDED; 889 } 890 if (jts == _thread_in_native) { 891 state |= JVMTI_THREAD_STATE_IN_NATIVE; 892 } 893 if (java_thread->is_interrupted(false)) { 894 state |= JVMTI_THREAD_STATE_INTERRUPTED; 895 } 896 } 897 898 *thread_state_ptr = state; 899 return JVMTI_ERROR_NONE; 900 } /* end GetThreadState */ 901 902 903 // thread_ptr - pre-checked for NULL 904 jvmtiError 905 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) { 906 JavaThread* current_thread = JavaThread::current(); 907 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj()); 908 return JVMTI_ERROR_NONE; 909 } /* end GetCurrentThread */ 910 911 912 // threads_count_ptr - pre-checked for NULL 913 // threads_ptr - pre-checked for NULL 914 jvmtiError 915 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) { 916 int nthreads = 0; 917 Handle *thread_objs = NULL; 918 ResourceMark rm; 919 HandleMark hm; 920 921 // enumerate threads (including agent threads) 922 ThreadsListEnumerator tle(Thread::current(), 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 ResourceMark rm; 1129 HandleMark hm; 1130 1131 JavaThread* current_thread = JavaThread::current(); 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 ResourceMark rm; 1404 HandleMark hm; 1405 1406 JavaThread* current_thread = JavaThread::current(); 1407 1408 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group)); 1409 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP); 1410 1411 const char* name; 1412 Handle parent_group; 1413 bool is_daemon; 1414 ThreadPriority max_priority; 1415 1416 name = java_lang_ThreadGroup::name(group_obj()); 1417 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj())); 1418 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj()); 1419 max_priority = java_lang_ThreadGroup::maxPriority(group_obj()); 1420 1421 info_ptr->is_daemon = is_daemon; 1422 info_ptr->max_priority = max_priority; 1423 info_ptr->parent = jni_reference(parent_group); 1424 1425 if (name != NULL) { 1426 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1); 1427 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY); 1428 strcpy(info_ptr->name, name); 1429 } else { 1430 info_ptr->name = NULL; 1431 } 1432 1433 return JVMTI_ERROR_NONE; 1434 } /* end GetThreadGroupInfo */ 1435 1436 1437 // thread_count_ptr - pre-checked for NULL 1438 // threads_ptr - pre-checked for NULL 1439 // group_count_ptr - pre-checked for NULL 1440 // groups_ptr - pre-checked for NULL 1441 jvmtiError 1442 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) { 1443 JavaThread* current_thread = JavaThread::current(); 1444 oop group_obj = (oop) JNIHandles::resolve_external_guard(group); 1445 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP); 1446 1447 Handle *thread_objs = NULL; 1448 Handle *group_objs = NULL; 1449 int nthreads = 0; 1450 int ngroups = 0; 1451 int hidden_threads = 0; 1452 1453 ResourceMark rm(current_thread); 1454 HandleMark hm(current_thread); 1455 1456 Handle group_hdl(current_thread, group_obj); 1457 1458 { // Cannot allow thread or group counts to change. 1459 ObjectLocker ol(group_hdl, current_thread); 1460 1461 nthreads = java_lang_ThreadGroup::nthreads(group_hdl()); 1462 ngroups = java_lang_ThreadGroup::ngroups(group_hdl()); 1463 1464 if (nthreads > 0) { 1465 ThreadsListHandle tlh(current_thread); 1466 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl()); 1467 assert(nthreads <= threads->length(), "too many threads"); 1468 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads); 1469 for (int i = 0, j = 0; i < nthreads; i++) { 1470 oop thread_obj = threads->obj_at(i); 1471 assert(thread_obj != NULL, "thread_obj is NULL"); 1472 JavaThread *java_thread = NULL; 1473 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread); 1474 if (err == JVMTI_ERROR_NONE) { 1475 // Have a valid JavaThread*. 1476 if (java_thread->is_hidden_from_external_view()) { 1477 // Filter out hidden java threads. 1478 hidden_threads++; 1479 continue; 1480 } 1481 } else { 1482 // We couldn't convert thread_obj into a JavaThread*. 1483 if (err == JVMTI_ERROR_INVALID_THREAD) { 1484 // The thread_obj does not refer to a java.lang.Thread object 1485 // so skip it. 1486 hidden_threads++; 1487 continue; 1488 } 1489 // We have a valid thread_obj, but no JavaThread*; the caller 1490 // can still have limited use for the thread_obj. 1491 } 1492 thread_objs[j++] = Handle(current_thread, thread_obj); 1493 } 1494 nthreads -= hidden_threads; 1495 } // ThreadsListHandle is destroyed here. 1496 1497 if (ngroups > 0) { 1498 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl()); 1499 assert(ngroups <= groups->length(), "too many groups"); 1500 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups); 1501 for (int i = 0; i < ngroups; i++) { 1502 oop group_obj = groups->obj_at(i); 1503 assert(group_obj != NULL, "group_obj != NULL"); 1504 group_objs[i] = Handle(current_thread, group_obj); 1505 } 1506 } 1507 } // ThreadGroup unlocked here 1508 1509 *group_count_ptr = ngroups; 1510 *thread_count_ptr = nthreads; 1511 *threads_ptr = new_jthreadArray(nthreads, thread_objs); 1512 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs); 1513 if ((nthreads > 0) && (*threads_ptr == NULL)) { 1514 return JVMTI_ERROR_OUT_OF_MEMORY; 1515 } 1516 if ((ngroups > 0) && (*groups_ptr == NULL)) { 1517 return JVMTI_ERROR_OUT_OF_MEMORY; 1518 } 1519 1520 return JVMTI_ERROR_NONE; 1521 } /* end GetThreadGroupChildren */ 1522 1523 1524 // 1525 // Stack Frame functions 1526 // 1527 1528 // Threads_lock NOT held, java_thread not protected by lock 1529 // java_thread - pre-checked 1530 // max_frame_count - pre-checked to be greater than or equal to 0 1531 // frame_buffer - pre-checked for NULL 1532 // count_ptr - pre-checked for NULL 1533 jvmtiError 1534 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) { 1535 jvmtiError err = JVMTI_ERROR_NONE; 1536 1537 // It is only safe to perform the direct operation on the current 1538 // thread. All other usage needs to use a direct handshake for safety. 1539 if (java_thread == JavaThread::current()) { 1540 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1541 } else { 1542 // Get stack trace with handshake. 1543 GetStackTraceClosure op(this, start_depth, max_frame_count, frame_buffer, count_ptr); 1544 bool executed = Handshake::execute_direct(&op, java_thread); 1545 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE; 1546 } 1547 1548 return err; 1549 } /* end GetStackTrace */ 1550 1551 1552 // max_frame_count - pre-checked to be greater than or equal to 0 1553 // stack_info_ptr - pre-checked for NULL 1554 // thread_count_ptr - pre-checked for NULL 1555 jvmtiError 1556 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) { 1557 jvmtiError err = JVMTI_ERROR_NONE; 1558 JavaThread* calling_thread = JavaThread::current(); 1559 1560 // JVMTI get stack traces at safepoint. 1561 VM_GetAllStackTraces op(this, calling_thread, max_frame_count); 1562 VMThread::execute(&op); 1563 *thread_count_ptr = op.final_thread_count(); 1564 *stack_info_ptr = op.stack_info(); 1565 err = op.result(); 1566 return err; 1567 } /* end GetAllStackTraces */ 1568 1569 1570 // thread_count - pre-checked to be greater than or equal to 0 1571 // thread_list - pre-checked for NULL 1572 // max_frame_count - pre-checked to be greater than or equal to 0 1573 // stack_info_ptr - pre-checked for NULL 1574 jvmtiError 1575 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) { 1576 jvmtiError err = JVMTI_ERROR_NONE; 1577 1578 if (thread_count == 1) { 1579 // Use direct handshake if we need to get only one stack trace. 1580 JavaThread *current_thread = JavaThread::current(); 1581 ThreadsListHandle tlh(current_thread); 1582 JavaThread *java_thread; 1583 err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), *thread_list, &java_thread, NULL); 1584 if (err != JVMTI_ERROR_NONE) { 1585 return err; 1586 } 1587 1588 GetSingleStackTraceClosure op(this, current_thread, *thread_list, max_frame_count); 1589 bool executed = Handshake::execute_direct(&op, java_thread); 1590 err = executed ? op.result() : JVMTI_ERROR_THREAD_NOT_ALIVE; 1591 if (err == JVMTI_ERROR_NONE) { 1592 *stack_info_ptr = op.stack_info(); 1593 } 1594 } else { 1595 // JVMTI get stack traces at safepoint. 1596 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count); 1597 VMThread::execute(&op); 1598 err = op.result(); 1599 if (err == JVMTI_ERROR_NONE) { 1600 *stack_info_ptr = op.stack_info(); 1601 } 1602 } 1603 return err; 1604 } /* end GetThreadListStackTraces */ 1605 1606 1607 // Threads_lock NOT held, java_thread not protected by lock 1608 // java_thread - pre-checked 1609 // count_ptr - pre-checked for NULL 1610 jvmtiError 1611 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) { 1612 jvmtiError err = JVMTI_ERROR_NONE; 1613 1614 // retrieve or create JvmtiThreadState. 1615 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1616 if (state == NULL) { 1617 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1618 } 1619 1620 // It is only safe to perform the direct operation on the current 1621 // thread. All other usage needs to use a vm-safepoint-op for safety. 1622 if (java_thread == JavaThread::current()) { 1623 err = get_frame_count(state, count_ptr); 1624 } else { 1625 // get java stack frame count at safepoint. 1626 VM_GetFrameCount op(this, state, count_ptr); 1627 VMThread::execute(&op); 1628 err = op.result(); 1629 } 1630 return err; 1631 } /* end GetFrameCount */ 1632 1633 1634 // Threads_lock NOT held, java_thread not protected by lock 1635 // java_thread - pre-checked 1636 jvmtiError 1637 JvmtiEnv::PopFrame(JavaThread* java_thread) { 1638 JavaThread* current_thread = JavaThread::current(); 1639 HandleMark hm(current_thread); 1640 uint32_t debug_bits = 0; 1641 1642 // retrieve or create the state 1643 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1644 if (state == NULL) { 1645 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1646 } 1647 1648 // Check if java_thread is fully suspended 1649 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) { 1650 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1651 } 1652 // Check to see if a PopFrame was already in progress 1653 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) { 1654 // Probably possible for JVMTI clients to trigger this, but the 1655 // JPDA backend shouldn't allow this to happen 1656 return JVMTI_ERROR_INTERNAL; 1657 } 1658 1659 { 1660 // Was workaround bug 1661 // 4812902: popFrame hangs if the method is waiting at a synchronize 1662 // Catch this condition and return an error to avoid hanging. 1663 // Now JVMTI spec allows an implementation to bail out with an opaque frame error. 1664 OSThread* osThread = java_thread->osthread(); 1665 if (osThread->get_state() == MONITOR_WAIT) { 1666 return JVMTI_ERROR_OPAQUE_FRAME; 1667 } 1668 } 1669 1670 { 1671 ResourceMark rm(current_thread); 1672 // Check if there are more than one Java frame in this thread, that the top two frames 1673 // are Java (not native) frames, and that there is no intervening VM frame 1674 int frame_count = 0; 1675 bool is_interpreted[2]; 1676 intptr_t *frame_sp[2]; 1677 // The 2-nd arg of constructor is needed to stop iterating at java entry frame. 1678 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) { 1679 methodHandle mh(current_thread, vfs.method()); 1680 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME); 1681 is_interpreted[frame_count] = vfs.is_interpreted_frame(); 1682 frame_sp[frame_count] = vfs.frame_id(); 1683 if (++frame_count > 1) break; 1684 } 1685 if (frame_count < 2) { 1686 // We haven't found two adjacent non-native Java frames on the top. 1687 // There can be two situations here: 1688 // 1. There are no more java frames 1689 // 2. Two top java frames are separated by non-java native frames 1690 if(vframeFor(java_thread, 1) == NULL) { 1691 return JVMTI_ERROR_NO_MORE_FRAMES; 1692 } else { 1693 // Intervening non-java native or VM frames separate java frames. 1694 // Current implementation does not support this. See bug #5031735. 1695 // In theory it is possible to pop frames in such cases. 1696 return JVMTI_ERROR_OPAQUE_FRAME; 1697 } 1698 } 1699 1700 // If any of the top 2 frames is a compiled one, need to deoptimize it 1701 for (int i = 0; i < 2; i++) { 1702 if (!is_interpreted[i]) { 1703 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]); 1704 } 1705 } 1706 1707 // Update the thread state to reflect that the top frame is popped 1708 // so that cur_stack_depth is maintained properly and all frameIDs 1709 // are invalidated. 1710 // The current frame will be popped later when the suspended thread 1711 // is resumed and right before returning from VM to Java. 1712 // (see call_VM_base() in assembler_<cpu>.cpp). 1713 1714 // It's fine to update the thread state here because no JVMTI events 1715 // shall be posted for this PopFrame. 1716 1717 // It is only safe to perform the direct operation on the current 1718 // thread. All other usage needs to use a vm-safepoint-op for safety. 1719 if (java_thread == JavaThread::current()) { 1720 state->update_for_pop_top_frame(); 1721 } else { 1722 VM_UpdateForPopTopFrame op(state); 1723 VMThread::execute(&op); 1724 jvmtiError err = op.result(); 1725 if (err != JVMTI_ERROR_NONE) { 1726 return err; 1727 } 1728 } 1729 1730 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit); 1731 // Set pending step flag for this popframe and it is cleared when next 1732 // step event is posted. 1733 state->set_pending_step_for_popframe(); 1734 } 1735 1736 return JVMTI_ERROR_NONE; 1737 } /* end PopFrame */ 1738 1739 1740 // Threads_lock NOT held, java_thread not protected by lock 1741 // java_thread - pre-checked 1742 // java_thread - unchecked 1743 // depth - pre-checked as non-negative 1744 // method_ptr - pre-checked for NULL 1745 // location_ptr - pre-checked for NULL 1746 jvmtiError 1747 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) { 1748 jvmtiError err = JVMTI_ERROR_NONE; 1749 1750 // It is only safe to perform the direct operation on the current 1751 // thread. All other usage needs to use a vm-safepoint-op for safety. 1752 if (java_thread == JavaThread::current()) { 1753 err = get_frame_location(java_thread, depth, method_ptr, location_ptr); 1754 } else { 1755 // JVMTI get java stack frame location at safepoint. 1756 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr); 1757 VMThread::execute(&op); 1758 err = op.result(); 1759 } 1760 return err; 1761 } /* end GetFrameLocation */ 1762 1763 1764 // Threads_lock NOT held, java_thread not protected by lock 1765 // java_thread - pre-checked 1766 // java_thread - unchecked 1767 // depth - pre-checked as non-negative 1768 jvmtiError 1769 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) { 1770 jvmtiError err = JVMTI_ERROR_NONE; 1771 ResourceMark rm; 1772 uint32_t debug_bits = 0; 1773 1774 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread); 1775 if (state == NULL) { 1776 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1777 } 1778 1779 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) { 1780 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1781 } 1782 1783 if (TraceJVMTICalls) { 1784 JvmtiSuspendControl::print(); 1785 } 1786 1787 vframe *vf = vframeFor(java_thread, depth); 1788 if (vf == NULL) { 1789 return JVMTI_ERROR_NO_MORE_FRAMES; 1790 } 1791 1792 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) { 1793 return JVMTI_ERROR_OPAQUE_FRAME; 1794 } 1795 1796 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL"); 1797 1798 // It is only safe to perform the direct operation on the current 1799 // thread. All other usage needs to use a vm-safepoint-op for safety. 1800 if (java_thread == JavaThread::current()) { 1801 int frame_number = state->count_frames() - depth; 1802 state->env_thread_state(this)->set_frame_pop(frame_number); 1803 } else { 1804 VM_SetFramePop op(this, state, depth); 1805 VMThread::execute(&op); 1806 err = op.result(); 1807 } 1808 return err; 1809 } /* end NotifyFramePop */ 1810 1811 1812 // 1813 // Force Early Return functions 1814 // 1815 1816 // Threads_lock NOT held, java_thread not protected by lock 1817 // java_thread - pre-checked 1818 jvmtiError 1819 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) { 1820 jvalue val; 1821 val.l = value; 1822 return force_early_return(java_thread, val, atos); 1823 } /* end ForceEarlyReturnObject */ 1824 1825 1826 // Threads_lock NOT held, java_thread not protected by lock 1827 // java_thread - pre-checked 1828 jvmtiError 1829 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) { 1830 jvalue val; 1831 val.i = value; 1832 return force_early_return(java_thread, val, itos); 1833 } /* end ForceEarlyReturnInt */ 1834 1835 1836 // Threads_lock NOT held, java_thread not protected by lock 1837 // java_thread - pre-checked 1838 jvmtiError 1839 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) { 1840 jvalue val; 1841 val.j = value; 1842 return force_early_return(java_thread, val, ltos); 1843 } /* end ForceEarlyReturnLong */ 1844 1845 1846 // Threads_lock NOT held, java_thread not protected by lock 1847 // java_thread - pre-checked 1848 jvmtiError 1849 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) { 1850 jvalue val; 1851 val.f = value; 1852 return force_early_return(java_thread, val, ftos); 1853 } /* end ForceEarlyReturnFloat */ 1854 1855 1856 // Threads_lock NOT held, java_thread not protected by lock 1857 // java_thread - pre-checked 1858 jvmtiError 1859 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) { 1860 jvalue val; 1861 val.d = value; 1862 return force_early_return(java_thread, val, dtos); 1863 } /* end ForceEarlyReturnDouble */ 1864 1865 1866 // Threads_lock NOT held, java_thread not protected by lock 1867 // java_thread - pre-checked 1868 jvmtiError 1869 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) { 1870 jvalue val; 1871 val.j = 0L; 1872 return force_early_return(java_thread, val, vtos); 1873 } /* end ForceEarlyReturnVoid */ 1874 1875 1876 // 1877 // Heap functions 1878 // 1879 1880 // klass - NULL is a valid value, must be checked 1881 // initial_object - NULL is a valid value, must be checked 1882 // callbacks - pre-checked for NULL 1883 // user_data - NULL is a valid value, must be checked 1884 jvmtiError 1885 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1886 // check klass if provided 1887 Klass* k = NULL; 1888 if (klass != NULL) { 1889 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1890 if (k_mirror == NULL) { 1891 return JVMTI_ERROR_INVALID_CLASS; 1892 } 1893 if (java_lang_Class::is_primitive(k_mirror)) { 1894 return JVMTI_ERROR_NONE; 1895 } 1896 k = java_lang_Class::as_Klass(k_mirror); 1897 if (klass == NULL) { 1898 return JVMTI_ERROR_INVALID_CLASS; 1899 } 1900 } 1901 1902 if (initial_object != NULL) { 1903 oop init_obj = JNIHandles::resolve_external_guard(initial_object); 1904 if (init_obj == NULL) { 1905 return JVMTI_ERROR_INVALID_OBJECT; 1906 } 1907 } 1908 1909 Thread *thread = Thread::current(); 1910 HandleMark hm(thread); 1911 1912 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1913 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data); 1914 return JVMTI_ERROR_NONE; 1915 } /* end FollowReferences */ 1916 1917 1918 // klass - NULL is a valid value, must be checked 1919 // callbacks - pre-checked for NULL 1920 // user_data - NULL is a valid value, must be checked 1921 jvmtiError 1922 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1923 // check klass if provided 1924 Klass* k = NULL; 1925 if (klass != NULL) { 1926 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1927 if (k_mirror == NULL) { 1928 return JVMTI_ERROR_INVALID_CLASS; 1929 } 1930 if (java_lang_Class::is_primitive(k_mirror)) { 1931 return JVMTI_ERROR_NONE; 1932 } 1933 k = java_lang_Class::as_Klass(k_mirror); 1934 if (k == NULL) { 1935 return JVMTI_ERROR_INVALID_CLASS; 1936 } 1937 } 1938 1939 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1940 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data); 1941 return JVMTI_ERROR_NONE; 1942 } /* end IterateThroughHeap */ 1943 1944 1945 // tag_ptr - pre-checked for NULL 1946 jvmtiError 1947 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) { 1948 oop o = JNIHandles::resolve_external_guard(object); 1949 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1950 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object); 1951 return JVMTI_ERROR_NONE; 1952 } /* end GetTag */ 1953 1954 1955 jvmtiError 1956 JvmtiEnv::SetTag(jobject object, jlong tag) { 1957 oop o = JNIHandles::resolve_external_guard(object); 1958 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1959 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag); 1960 return JVMTI_ERROR_NONE; 1961 } /* end SetTag */ 1962 1963 1964 // tag_count - pre-checked to be greater than or equal to 0 1965 // tags - pre-checked for NULL 1966 // count_ptr - pre-checked for NULL 1967 // object_result_ptr - NULL is a valid value, must be checked 1968 // tag_result_ptr - NULL is a valid value, must be checked 1969 jvmtiError 1970 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { 1971 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1972 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr); 1973 } /* end GetObjectsWithTags */ 1974 1975 1976 jvmtiError 1977 JvmtiEnv::ForceGarbageCollection() { 1978 Universe::heap()->collect(GCCause::_jvmti_force_gc); 1979 return JVMTI_ERROR_NONE; 1980 } /* end ForceGarbageCollection */ 1981 1982 1983 // 1984 // Heap (1.0) functions 1985 // 1986 1987 // object_reference_callback - pre-checked for NULL 1988 // user_data - NULL is a valid value, must be checked 1989 jvmtiError 1990 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) { 1991 oop o = JNIHandles::resolve_external_guard(object); 1992 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1993 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data); 1994 return JVMTI_ERROR_NONE; 1995 } /* end IterateOverObjectsReachableFromObject */ 1996 1997 1998 // heap_root_callback - NULL is a valid value, must be checked 1999 // stack_ref_callback - NULL is a valid value, must be checked 2000 // object_ref_callback - NULL is a valid value, must be checked 2001 // user_data - NULL is a valid value, must be checked 2002 jvmtiError 2003 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) { 2004 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2005 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data); 2006 return JVMTI_ERROR_NONE; 2007 } /* end IterateOverReachableObjects */ 2008 2009 2010 // heap_object_callback - pre-checked for NULL 2011 // user_data - NULL is a valid value, must be checked 2012 jvmtiError 2013 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 2014 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2015 Thread *thread = Thread::current(); 2016 HandleMark hm(thread); 2017 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data); 2018 return JVMTI_ERROR_NONE; 2019 } /* end IterateOverHeap */ 2020 2021 2022 // k_mirror - may be primitive, this must be checked 2023 // heap_object_callback - pre-checked for NULL 2024 // user_data - NULL is a valid value, must be checked 2025 jvmtiError 2026 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 2027 if (java_lang_Class::is_primitive(k_mirror)) { 2028 // DO PRIMITIVE CLASS PROCESSING 2029 return JVMTI_ERROR_NONE; 2030 } 2031 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2032 if (klass == NULL) { 2033 return JVMTI_ERROR_INVALID_CLASS; 2034 } 2035 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2036 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data); 2037 return JVMTI_ERROR_NONE; 2038 } /* end IterateOverInstancesOfClass */ 2039 2040 2041 // 2042 // Local Variable functions 2043 // 2044 2045 // Threads_lock NOT held, java_thread not protected by lock 2046 // java_thread - pre-checked 2047 // java_thread - unchecked 2048 // depth - pre-checked as non-negative 2049 // value_ptr - pre-checked for NULL 2050 jvmtiError 2051 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) { 2052 JavaThread* current_thread = JavaThread::current(); 2053 // rm object is created to clean up the javaVFrame created in 2054 // doit_prologue(), but after doit() is finished with it. 2055 ResourceMark rm(current_thread); 2056 2057 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot); 2058 VMThread::execute(&op); 2059 jvmtiError err = op.result(); 2060 if (err != JVMTI_ERROR_NONE) { 2061 return err; 2062 } else { 2063 *value_ptr = op.value().l; 2064 return JVMTI_ERROR_NONE; 2065 } 2066 } /* end GetLocalObject */ 2067 2068 // Threads_lock NOT held, java_thread not protected by lock 2069 // java_thread - pre-checked 2070 // java_thread - unchecked 2071 // depth - pre-checked as non-negative 2072 // value - pre-checked for NULL 2073 jvmtiError 2074 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){ 2075 JavaThread* current_thread = JavaThread::current(); 2076 // rm object is created to clean up the javaVFrame created in 2077 // doit_prologue(), but after doit() is finished with it. 2078 ResourceMark rm(current_thread); 2079 2080 VM_GetReceiver op(java_thread, current_thread, depth); 2081 VMThread::execute(&op); 2082 jvmtiError err = op.result(); 2083 if (err != JVMTI_ERROR_NONE) { 2084 return err; 2085 } else { 2086 *value_ptr = op.value().l; 2087 return JVMTI_ERROR_NONE; 2088 } 2089 } /* end GetLocalInstance */ 2090 2091 2092 // Threads_lock NOT held, java_thread not protected by lock 2093 // java_thread - pre-checked 2094 // java_thread - unchecked 2095 // depth - pre-checked as non-negative 2096 // value_ptr - pre-checked for NULL 2097 jvmtiError 2098 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) { 2099 // rm object is created to clean up the javaVFrame created in 2100 // doit_prologue(), but after doit() is finished with it. 2101 ResourceMark rm; 2102 2103 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT); 2104 VMThread::execute(&op); 2105 *value_ptr = op.value().i; 2106 return op.result(); 2107 } /* end GetLocalInt */ 2108 2109 2110 // Threads_lock NOT held, java_thread not protected by lock 2111 // java_thread - pre-checked 2112 // java_thread - unchecked 2113 // depth - pre-checked as non-negative 2114 // value_ptr - pre-checked for NULL 2115 jvmtiError 2116 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) { 2117 // rm object is created to clean up the javaVFrame created in 2118 // doit_prologue(), but after doit() is finished with it. 2119 ResourceMark rm; 2120 2121 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG); 2122 VMThread::execute(&op); 2123 *value_ptr = op.value().j; 2124 return op.result(); 2125 } /* end GetLocalLong */ 2126 2127 2128 // Threads_lock NOT held, java_thread not protected by lock 2129 // java_thread - pre-checked 2130 // java_thread - unchecked 2131 // depth - pre-checked as non-negative 2132 // value_ptr - pre-checked for NULL 2133 jvmtiError 2134 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) { 2135 // rm object is created to clean up the javaVFrame created in 2136 // doit_prologue(), but after doit() is finished with it. 2137 ResourceMark rm; 2138 2139 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT); 2140 VMThread::execute(&op); 2141 *value_ptr = op.value().f; 2142 return op.result(); 2143 } /* end GetLocalFloat */ 2144 2145 2146 // Threads_lock NOT held, java_thread not protected by lock 2147 // java_thread - pre-checked 2148 // java_thread - unchecked 2149 // depth - pre-checked as non-negative 2150 // value_ptr - pre-checked for NULL 2151 jvmtiError 2152 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) { 2153 // rm object is created to clean up the javaVFrame created in 2154 // doit_prologue(), but after doit() is finished with it. 2155 ResourceMark rm; 2156 2157 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE); 2158 VMThread::execute(&op); 2159 *value_ptr = op.value().d; 2160 return op.result(); 2161 } /* end GetLocalDouble */ 2162 2163 2164 // Threads_lock NOT held, java_thread not protected by lock 2165 // java_thread - pre-checked 2166 // java_thread - unchecked 2167 // depth - pre-checked as non-negative 2168 jvmtiError 2169 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) { 2170 // rm object is created to clean up the javaVFrame created in 2171 // doit_prologue(), but after doit() is finished with it. 2172 ResourceMark rm; 2173 jvalue val; 2174 val.l = value; 2175 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val); 2176 VMThread::execute(&op); 2177 return op.result(); 2178 } /* end SetLocalObject */ 2179 2180 2181 // Threads_lock NOT held, java_thread not protected by lock 2182 // java_thread - pre-checked 2183 // java_thread - unchecked 2184 // depth - pre-checked as non-negative 2185 jvmtiError 2186 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) { 2187 // rm object is created to clean up the javaVFrame created in 2188 // doit_prologue(), but after doit() is finished with it. 2189 ResourceMark rm; 2190 jvalue val; 2191 val.i = value; 2192 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val); 2193 VMThread::execute(&op); 2194 return op.result(); 2195 } /* end SetLocalInt */ 2196 2197 2198 // Threads_lock NOT held, java_thread not protected by lock 2199 // java_thread - pre-checked 2200 // java_thread - unchecked 2201 // depth - pre-checked as non-negative 2202 jvmtiError 2203 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) { 2204 // rm object is created to clean up the javaVFrame created in 2205 // doit_prologue(), but after doit() is finished with it. 2206 ResourceMark rm; 2207 jvalue val; 2208 val.j = value; 2209 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val); 2210 VMThread::execute(&op); 2211 return op.result(); 2212 } /* end SetLocalLong */ 2213 2214 2215 // Threads_lock NOT held, java_thread not protected by lock 2216 // java_thread - pre-checked 2217 // java_thread - unchecked 2218 // depth - pre-checked as non-negative 2219 jvmtiError 2220 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) { 2221 // rm object is created to clean up the javaVFrame created in 2222 // doit_prologue(), but after doit() is finished with it. 2223 ResourceMark rm; 2224 jvalue val; 2225 val.f = value; 2226 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val); 2227 VMThread::execute(&op); 2228 return op.result(); 2229 } /* end SetLocalFloat */ 2230 2231 2232 // Threads_lock NOT held, java_thread not protected by lock 2233 // java_thread - pre-checked 2234 // java_thread - unchecked 2235 // depth - pre-checked as non-negative 2236 jvmtiError 2237 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) { 2238 // rm object is created to clean up the javaVFrame created in 2239 // doit_prologue(), but after doit() is finished with it. 2240 ResourceMark rm; 2241 jvalue val; 2242 val.d = value; 2243 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val); 2244 VMThread::execute(&op); 2245 return op.result(); 2246 } /* end SetLocalDouble */ 2247 2248 2249 // 2250 // Breakpoint functions 2251 // 2252 2253 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2254 jvmtiError 2255 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) { 2256 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2257 if (location < 0) { // simple invalid location check first 2258 return JVMTI_ERROR_INVALID_LOCATION; 2259 } 2260 // verify that the breakpoint is not past the end of the method 2261 if (location >= (jlocation) method_oop->code_size()) { 2262 return JVMTI_ERROR_INVALID_LOCATION; 2263 } 2264 2265 ResourceMark rm; 2266 JvmtiBreakpoint bp(method_oop, location); 2267 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2268 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE) 2269 return JVMTI_ERROR_DUPLICATE; 2270 2271 if (TraceJVMTICalls) { 2272 jvmti_breakpoints.print(); 2273 } 2274 2275 return JVMTI_ERROR_NONE; 2276 } /* end SetBreakpoint */ 2277 2278 2279 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2280 jvmtiError 2281 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) { 2282 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2283 2284 if (location < 0) { // simple invalid location check first 2285 return JVMTI_ERROR_INVALID_LOCATION; 2286 } 2287 2288 // verify that the breakpoint is not past the end of the method 2289 if (location >= (jlocation) method_oop->code_size()) { 2290 return JVMTI_ERROR_INVALID_LOCATION; 2291 } 2292 2293 JvmtiBreakpoint bp(method_oop, location); 2294 2295 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2296 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND) 2297 return JVMTI_ERROR_NOT_FOUND; 2298 2299 if (TraceJVMTICalls) { 2300 jvmti_breakpoints.print(); 2301 } 2302 2303 return JVMTI_ERROR_NONE; 2304 } /* end ClearBreakpoint */ 2305 2306 2307 // 2308 // Watched Field functions 2309 // 2310 2311 jvmtiError 2312 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2313 // make sure we haven't set this watch before 2314 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE; 2315 fdesc_ptr->set_is_field_access_watched(true); 2316 2317 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true); 2318 2319 return JVMTI_ERROR_NONE; 2320 } /* end SetFieldAccessWatch */ 2321 2322 2323 jvmtiError 2324 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2325 // make sure we have a watch to clear 2326 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND; 2327 fdesc_ptr->set_is_field_access_watched(false); 2328 2329 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false); 2330 2331 return JVMTI_ERROR_NONE; 2332 } /* end ClearFieldAccessWatch */ 2333 2334 2335 jvmtiError 2336 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2337 // make sure we haven't set this watch before 2338 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE; 2339 fdesc_ptr->set_is_field_modification_watched(true); 2340 2341 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true); 2342 2343 return JVMTI_ERROR_NONE; 2344 } /* end SetFieldModificationWatch */ 2345 2346 2347 jvmtiError 2348 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2349 // make sure we have a watch to clear 2350 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND; 2351 fdesc_ptr->set_is_field_modification_watched(false); 2352 2353 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false); 2354 2355 return JVMTI_ERROR_NONE; 2356 } /* end ClearFieldModificationWatch */ 2357 2358 // 2359 // Class functions 2360 // 2361 2362 2363 // k_mirror - may be primitive, this must be checked 2364 // signature_ptr - NULL is a valid value, must be checked 2365 // generic_ptr - NULL is a valid value, must be checked 2366 jvmtiError 2367 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) { 2368 ResourceMark rm; 2369 bool isPrimitive = java_lang_Class::is_primitive(k_mirror); 2370 Klass* k = NULL; 2371 if (!isPrimitive) { 2372 k = java_lang_Class::as_Klass(k_mirror); 2373 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2374 } 2375 if (signature_ptr != NULL) { 2376 char* result = NULL; 2377 if (isPrimitive) { 2378 char tchar = type2char(java_lang_Class::primitive_type(k_mirror)); 2379 result = (char*) jvmtiMalloc(2); 2380 result[0] = tchar; 2381 result[1] = '\0'; 2382 } else { 2383 const char* class_sig = k->signature_name(); 2384 result = (char *) jvmtiMalloc(strlen(class_sig)+1); 2385 strcpy(result, class_sig); 2386 } 2387 *signature_ptr = result; 2388 } 2389 if (generic_ptr != NULL) { 2390 *generic_ptr = NULL; 2391 if (!isPrimitive && k->is_instance_klass()) { 2392 Symbol* soo = InstanceKlass::cast(k)->generic_signature(); 2393 if (soo != NULL) { 2394 const char *gen_sig = soo->as_C_string(); 2395 if (gen_sig != NULL) { 2396 char* gen_result; 2397 jvmtiError err = allocate(strlen(gen_sig) + 1, 2398 (unsigned char **)&gen_result); 2399 if (err != JVMTI_ERROR_NONE) { 2400 return err; 2401 } 2402 strcpy(gen_result, gen_sig); 2403 *generic_ptr = gen_result; 2404 } 2405 } 2406 } 2407 } 2408 return JVMTI_ERROR_NONE; 2409 } /* end GetClassSignature */ 2410 2411 2412 // k_mirror - may be primitive, this must be checked 2413 // status_ptr - pre-checked for NULL 2414 jvmtiError 2415 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) { 2416 jint result = 0; 2417 if (java_lang_Class::is_primitive(k_mirror)) { 2418 result |= JVMTI_CLASS_STATUS_PRIMITIVE; 2419 } else { 2420 Klass* k = java_lang_Class::as_Klass(k_mirror); 2421 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2422 result = k->jvmti_class_status(); 2423 } 2424 *status_ptr = result; 2425 2426 return JVMTI_ERROR_NONE; 2427 } /* end GetClassStatus */ 2428 2429 2430 // k_mirror - may be primitive, this must be checked 2431 // source_name_ptr - pre-checked for NULL 2432 jvmtiError 2433 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) { 2434 if (java_lang_Class::is_primitive(k_mirror)) { 2435 return JVMTI_ERROR_ABSENT_INFORMATION; 2436 } 2437 Klass* k_klass = java_lang_Class::as_Klass(k_mirror); 2438 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS); 2439 2440 if (!k_klass->is_instance_klass()) { 2441 return JVMTI_ERROR_ABSENT_INFORMATION; 2442 } 2443 2444 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name(); 2445 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION); 2446 { 2447 JavaThread* current_thread = JavaThread::current(); 2448 ResourceMark rm(current_thread); 2449 const char* sfncp = (const char*) sfnOop->as_C_string(); 2450 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1); 2451 strcpy(*source_name_ptr, sfncp); 2452 } 2453 2454 return JVMTI_ERROR_NONE; 2455 } /* end GetSourceFileName */ 2456 2457 2458 // k_mirror - may be primitive, this must be checked 2459 // modifiers_ptr - pre-checked for NULL 2460 jvmtiError 2461 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) { 2462 JavaThread* current_thread = JavaThread::current(); 2463 jint result = 0; 2464 if (!java_lang_Class::is_primitive(k_mirror)) { 2465 Klass* k = java_lang_Class::as_Klass(k_mirror); 2466 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2467 result = k->compute_modifier_flags(current_thread); 2468 JavaThread* THREAD = current_thread; // pass to macros 2469 if (HAS_PENDING_EXCEPTION) { 2470 CLEAR_PENDING_EXCEPTION; 2471 return JVMTI_ERROR_INTERNAL; 2472 }; 2473 2474 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()). 2475 if(k->is_super()) { 2476 result |= JVM_ACC_SUPER; 2477 } 2478 } else { 2479 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 2480 } 2481 *modifiers_ptr = result; 2482 2483 return JVMTI_ERROR_NONE; 2484 } /* end GetClassModifiers */ 2485 2486 2487 // k_mirror - may be primitive, this must be checked 2488 // method_count_ptr - pre-checked for NULL 2489 // methods_ptr - pre-checked for NULL 2490 jvmtiError 2491 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) { 2492 JavaThread* current_thread = JavaThread::current(); 2493 HandleMark hm(current_thread); 2494 2495 if (java_lang_Class::is_primitive(k_mirror)) { 2496 *method_count_ptr = 0; 2497 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2498 return JVMTI_ERROR_NONE; 2499 } 2500 Klass* k = java_lang_Class::as_Klass(k_mirror); 2501 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2502 2503 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2504 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2505 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2506 } 2507 2508 if (!k->is_instance_klass()) { 2509 *method_count_ptr = 0; 2510 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2511 return JVMTI_ERROR_NONE; 2512 } 2513 InstanceKlass* ik = InstanceKlass::cast(k); 2514 // Allocate the result and fill it in 2515 int result_length = ik->methods()->length(); 2516 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID)); 2517 int index; 2518 bool jmethodids_found = true; 2519 2520 if (JvmtiExport::can_maintain_original_method_order()) { 2521 // Use the original method ordering indices stored in the class, so we can emit 2522 // jmethodIDs in the order they appeared in the class file 2523 for (index = 0; index < result_length; index++) { 2524 Method* m = ik->methods()->at(index); 2525 int original_index = ik->method_ordering()->at(index); 2526 assert(original_index >= 0 && original_index < result_length, "invalid original method index"); 2527 jmethodID id; 2528 if (jmethodids_found) { 2529 id = m->find_jmethod_id_or_null(); 2530 if (id == NULL) { 2531 // If we find an uninitialized value, make sure there is 2532 // enough space for all the uninitialized values we might 2533 // find. 2534 ik->ensure_space_for_methodids(index); 2535 jmethodids_found = false; 2536 id = m->jmethod_id(); 2537 } 2538 } else { 2539 id = m->jmethod_id(); 2540 } 2541 result_list[original_index] = id; 2542 } 2543 } else { 2544 // otherwise just copy in any order 2545 for (index = 0; index < result_length; index++) { 2546 Method* m = ik->methods()->at(index); 2547 jmethodID id; 2548 if (jmethodids_found) { 2549 id = m->find_jmethod_id_or_null(); 2550 if (id == NULL) { 2551 // If we find an uninitialized value, make sure there is 2552 // enough space for all the uninitialized values we might 2553 // find. 2554 ik->ensure_space_for_methodids(index); 2555 jmethodids_found = false; 2556 id = m->jmethod_id(); 2557 } 2558 } else { 2559 id = m->jmethod_id(); 2560 } 2561 result_list[index] = id; 2562 } 2563 } 2564 // Fill in return value. 2565 *method_count_ptr = result_length; 2566 *methods_ptr = result_list; 2567 2568 return JVMTI_ERROR_NONE; 2569 } /* end GetClassMethods */ 2570 2571 2572 // k_mirror - may be primitive, this must be checked 2573 // field_count_ptr - pre-checked for NULL 2574 // fields_ptr - pre-checked for NULL 2575 jvmtiError 2576 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) { 2577 if (java_lang_Class::is_primitive(k_mirror)) { 2578 *field_count_ptr = 0; 2579 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2580 return JVMTI_ERROR_NONE; 2581 } 2582 JavaThread* current_thread = JavaThread::current(); 2583 HandleMark hm(current_thread); 2584 Klass* k = java_lang_Class::as_Klass(k_mirror); 2585 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2586 2587 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2588 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2589 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2590 } 2591 2592 if (!k->is_instance_klass()) { 2593 *field_count_ptr = 0; 2594 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2595 return JVMTI_ERROR_NONE; 2596 } 2597 2598 2599 InstanceKlass* ik = InstanceKlass::cast(k); 2600 2601 int result_count = 0; 2602 // First, count the fields. 2603 FilteredFieldStream flds(ik, true, true); 2604 result_count = flds.field_count(); 2605 2606 // Allocate the result and fill it in 2607 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID)); 2608 // The JVMTI spec requires fields in the order they occur in the class file, 2609 // this is the reverse order of what FieldStream hands out. 2610 int id_index = (result_count - 1); 2611 2612 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) { 2613 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID( 2614 ik, src_st.offset(), 2615 src_st.access_flags().is_static()); 2616 } 2617 assert(id_index == -1, "just checking"); 2618 // Fill in the results 2619 *field_count_ptr = result_count; 2620 *fields_ptr = result_list; 2621 2622 return JVMTI_ERROR_NONE; 2623 } /* end GetClassFields */ 2624 2625 2626 // k_mirror - may be primitive, this must be checked 2627 // interface_count_ptr - pre-checked for NULL 2628 // interfaces_ptr - pre-checked for NULL 2629 jvmtiError 2630 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) { 2631 { 2632 if (java_lang_Class::is_primitive(k_mirror)) { 2633 *interface_count_ptr = 0; 2634 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2635 return JVMTI_ERROR_NONE; 2636 } 2637 JavaThread* current_thread = JavaThread::current(); 2638 HandleMark hm(current_thread); 2639 Klass* k = java_lang_Class::as_Klass(k_mirror); 2640 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2641 2642 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2643 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) 2644 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2645 2646 if (!k->is_instance_klass()) { 2647 *interface_count_ptr = 0; 2648 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2649 return JVMTI_ERROR_NONE; 2650 } 2651 2652 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces(); 2653 const int result_length = (interface_list == NULL ? 0 : interface_list->length()); 2654 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass)); 2655 for (int i_index = 0; i_index < result_length; i_index += 1) { 2656 InstanceKlass* klass_at = interface_list->at(i_index); 2657 assert(klass_at->is_klass(), "interfaces must be Klass*s"); 2658 assert(klass_at->is_interface(), "interfaces must be interfaces"); 2659 oop mirror_at = klass_at->java_mirror(); 2660 Handle handle_at = Handle(current_thread, mirror_at); 2661 result_list[i_index] = (jclass) jni_reference(handle_at); 2662 } 2663 *interface_count_ptr = result_length; 2664 *interfaces_ptr = result_list; 2665 } 2666 2667 return JVMTI_ERROR_NONE; 2668 } /* end GetImplementedInterfaces */ 2669 2670 2671 // k_mirror - may be primitive, this must be checked 2672 // minor_version_ptr - pre-checked for NULL 2673 // major_version_ptr - pre-checked for NULL 2674 jvmtiError 2675 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) { 2676 if (java_lang_Class::is_primitive(k_mirror)) { 2677 return JVMTI_ERROR_ABSENT_INFORMATION; 2678 } 2679 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2680 2681 jint status = klass->jvmti_class_status(); 2682 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2683 return JVMTI_ERROR_INVALID_CLASS; 2684 } 2685 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2686 return JVMTI_ERROR_ABSENT_INFORMATION; 2687 } 2688 2689 InstanceKlass* ik = InstanceKlass::cast(klass); 2690 *minor_version_ptr = ik->minor_version(); 2691 *major_version_ptr = ik->major_version(); 2692 2693 return JVMTI_ERROR_NONE; 2694 } /* end GetClassVersionNumbers */ 2695 2696 2697 // k_mirror - may be primitive, this must be checked 2698 // constant_pool_count_ptr - pre-checked for NULL 2699 // constant_pool_byte_count_ptr - pre-checked for NULL 2700 // constant_pool_bytes_ptr - pre-checked for NULL 2701 jvmtiError 2702 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) { 2703 if (java_lang_Class::is_primitive(k_mirror)) { 2704 return JVMTI_ERROR_ABSENT_INFORMATION; 2705 } 2706 2707 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2708 Thread *thread = Thread::current(); 2709 ResourceMark rm(thread); 2710 2711 jint status = klass->jvmti_class_status(); 2712 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2713 return JVMTI_ERROR_INVALID_CLASS; 2714 } 2715 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2716 return JVMTI_ERROR_ABSENT_INFORMATION; 2717 } 2718 2719 InstanceKlass* ik = InstanceKlass::cast(klass); 2720 JvmtiConstantPoolReconstituter reconstituter(ik); 2721 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2722 return reconstituter.get_error(); 2723 } 2724 2725 unsigned char *cpool_bytes; 2726 int cpool_size = reconstituter.cpool_size(); 2727 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2728 return reconstituter.get_error(); 2729 } 2730 jvmtiError res = allocate(cpool_size, &cpool_bytes); 2731 if (res != JVMTI_ERROR_NONE) { 2732 return res; 2733 } 2734 reconstituter.copy_cpool_bytes(cpool_bytes); 2735 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2736 return reconstituter.get_error(); 2737 } 2738 2739 constantPoolHandle constants(thread, ik->constants()); 2740 *constant_pool_count_ptr = constants->length(); 2741 *constant_pool_byte_count_ptr = cpool_size; 2742 *constant_pool_bytes_ptr = cpool_bytes; 2743 2744 return JVMTI_ERROR_NONE; 2745 } /* end GetConstantPool */ 2746 2747 2748 // k_mirror - may be primitive, this must be checked 2749 // is_interface_ptr - pre-checked for NULL 2750 jvmtiError 2751 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) { 2752 { 2753 bool result = false; 2754 if (!java_lang_Class::is_primitive(k_mirror)) { 2755 Klass* k = java_lang_Class::as_Klass(k_mirror); 2756 if (k != NULL && k->is_interface()) { 2757 result = true; 2758 } 2759 } 2760 *is_interface_ptr = result; 2761 } 2762 2763 return JVMTI_ERROR_NONE; 2764 } /* end IsInterface */ 2765 2766 2767 // k_mirror - may be primitive, this must be checked 2768 // is_array_class_ptr - pre-checked for NULL 2769 jvmtiError 2770 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) { 2771 { 2772 bool result = false; 2773 if (!java_lang_Class::is_primitive(k_mirror)) { 2774 Klass* k = java_lang_Class::as_Klass(k_mirror); 2775 if (k != NULL && k->is_array_klass()) { 2776 result = true; 2777 } 2778 } 2779 *is_array_class_ptr = result; 2780 } 2781 2782 return JVMTI_ERROR_NONE; 2783 } /* end IsArrayClass */ 2784 2785 2786 // k_mirror - may be primitive, this must be checked 2787 // classloader_ptr - pre-checked for NULL 2788 jvmtiError 2789 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) { 2790 { 2791 if (java_lang_Class::is_primitive(k_mirror)) { 2792 *classloader_ptr = (jclass) jni_reference(Handle()); 2793 return JVMTI_ERROR_NONE; 2794 } 2795 JavaThread* current_thread = JavaThread::current(); 2796 HandleMark hm(current_thread); 2797 Klass* k = java_lang_Class::as_Klass(k_mirror); 2798 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2799 2800 oop result_oop = k->class_loader(); 2801 if (result_oop == NULL) { 2802 *classloader_ptr = (jclass) jni_reference(Handle()); 2803 return JVMTI_ERROR_NONE; 2804 } 2805 Handle result_handle = Handle(current_thread, result_oop); 2806 jclass result_jnihandle = (jclass) jni_reference(result_handle); 2807 *classloader_ptr = result_jnihandle; 2808 } 2809 return JVMTI_ERROR_NONE; 2810 } /* end GetClassLoader */ 2811 2812 2813 // k_mirror - may be primitive, this must be checked 2814 // source_debug_extension_ptr - pre-checked for NULL 2815 jvmtiError 2816 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) { 2817 { 2818 if (java_lang_Class::is_primitive(k_mirror)) { 2819 return JVMTI_ERROR_ABSENT_INFORMATION; 2820 } 2821 Klass* k = java_lang_Class::as_Klass(k_mirror); 2822 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2823 if (!k->is_instance_klass()) { 2824 return JVMTI_ERROR_ABSENT_INFORMATION; 2825 } 2826 const char* sde = InstanceKlass::cast(k)->source_debug_extension(); 2827 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION); 2828 2829 { 2830 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1); 2831 strcpy(*source_debug_extension_ptr, sde); 2832 } 2833 } 2834 2835 return JVMTI_ERROR_NONE; 2836 } /* end GetSourceDebugExtension */ 2837 2838 // 2839 // Object functions 2840 // 2841 2842 // hash_code_ptr - pre-checked for NULL 2843 jvmtiError 2844 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) { 2845 oop mirror = JNIHandles::resolve_external_guard(object); 2846 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 2847 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER); 2848 2849 { 2850 jint result = (jint) mirror->identity_hash(); 2851 *hash_code_ptr = result; 2852 } 2853 return JVMTI_ERROR_NONE; 2854 } /* end GetObjectHashCode */ 2855 2856 2857 // info_ptr - pre-checked for NULL 2858 jvmtiError 2859 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) { 2860 // This needs to be performed at a safepoint to gather stable data 2861 // because monitor owner / waiters might not be suspended. 2862 VM_GetObjectMonitorUsage op(this, JavaThread::current(), object, info_ptr); 2863 VMThread::execute(&op); 2864 return op.result(); 2865 } /* end GetObjectMonitorUsage */ 2866 2867 2868 // 2869 // Field functions 2870 // 2871 2872 // name_ptr - NULL is a valid value, must be checked 2873 // signature_ptr - NULL is a valid value, must be checked 2874 // generic_ptr - NULL is a valid value, must be checked 2875 jvmtiError 2876 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2877 JavaThread* current_thread = JavaThread::current(); 2878 ResourceMark rm(current_thread); 2879 if (name_ptr == NULL) { 2880 // just don't return the name 2881 } else { 2882 const char* fieldName = fdesc_ptr->name()->as_C_string(); 2883 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1); 2884 if (*name_ptr == NULL) 2885 return JVMTI_ERROR_OUT_OF_MEMORY; 2886 strcpy(*name_ptr, fieldName); 2887 } 2888 if (signature_ptr== NULL) { 2889 // just don't return the signature 2890 } else { 2891 const char* fieldSignature = fdesc_ptr->signature()->as_C_string(); 2892 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1); 2893 if (*signature_ptr == NULL) 2894 return JVMTI_ERROR_OUT_OF_MEMORY; 2895 strcpy(*signature_ptr, fieldSignature); 2896 } 2897 if (generic_ptr != NULL) { 2898 *generic_ptr = NULL; 2899 Symbol* soop = fdesc_ptr->generic_signature(); 2900 if (soop != NULL) { 2901 const char* gen_sig = soop->as_C_string(); 2902 if (gen_sig != NULL) { 2903 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2904 if (err != JVMTI_ERROR_NONE) { 2905 return err; 2906 } 2907 strcpy(*generic_ptr, gen_sig); 2908 } 2909 } 2910 } 2911 return JVMTI_ERROR_NONE; 2912 } /* end GetFieldName */ 2913 2914 2915 // declaring_class_ptr - pre-checked for NULL 2916 jvmtiError 2917 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) { 2918 2919 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder()); 2920 return JVMTI_ERROR_NONE; 2921 } /* end GetFieldDeclaringClass */ 2922 2923 2924 // modifiers_ptr - pre-checked for NULL 2925 jvmtiError 2926 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) { 2927 2928 AccessFlags resultFlags = fdesc_ptr->access_flags(); 2929 jint result = resultFlags.as_int(); 2930 *modifiers_ptr = result; 2931 2932 return JVMTI_ERROR_NONE; 2933 } /* end GetFieldModifiers */ 2934 2935 2936 // is_synthetic_ptr - pre-checked for NULL 2937 jvmtiError 2938 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) { 2939 *is_synthetic_ptr = fdesc_ptr->is_synthetic(); 2940 return JVMTI_ERROR_NONE; 2941 } /* end IsFieldSynthetic */ 2942 2943 2944 // 2945 // Method functions 2946 // 2947 2948 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2949 // name_ptr - NULL is a valid value, must be checked 2950 // signature_ptr - NULL is a valid value, must be checked 2951 // generic_ptr - NULL is a valid value, must be checked 2952 jvmtiError 2953 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2954 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2955 JavaThread* current_thread = JavaThread::current(); 2956 2957 ResourceMark rm(current_thread); // get the utf8 name and signature 2958 if (name_ptr == NULL) { 2959 // just don't return the name 2960 } else { 2961 const char* utf8_name = (const char *) method_oop->name()->as_utf8(); 2962 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1); 2963 strcpy(*name_ptr, utf8_name); 2964 } 2965 if (signature_ptr == NULL) { 2966 // just don't return the signature 2967 } else { 2968 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8(); 2969 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1); 2970 strcpy(*signature_ptr, utf8_signature); 2971 } 2972 2973 if (generic_ptr != NULL) { 2974 *generic_ptr = NULL; 2975 Symbol* soop = method_oop->generic_signature(); 2976 if (soop != NULL) { 2977 const char* gen_sig = soop->as_C_string(); 2978 if (gen_sig != NULL) { 2979 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2980 if (err != JVMTI_ERROR_NONE) { 2981 return err; 2982 } 2983 strcpy(*generic_ptr, gen_sig); 2984 } 2985 } 2986 } 2987 return JVMTI_ERROR_NONE; 2988 } /* end GetMethodName */ 2989 2990 2991 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2992 // declaring_class_ptr - pre-checked for NULL 2993 jvmtiError 2994 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) { 2995 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2996 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder()); 2997 return JVMTI_ERROR_NONE; 2998 } /* end GetMethodDeclaringClass */ 2999 3000 3001 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3002 // modifiers_ptr - pre-checked for NULL 3003 jvmtiError 3004 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) { 3005 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3006 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 3007 return JVMTI_ERROR_NONE; 3008 } /* end GetMethodModifiers */ 3009 3010 3011 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3012 // max_ptr - pre-checked for NULL 3013 jvmtiError 3014 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) { 3015 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3016 // get max stack 3017 (*max_ptr) = method_oop->max_locals(); 3018 return JVMTI_ERROR_NONE; 3019 } /* end GetMaxLocals */ 3020 3021 3022 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3023 // size_ptr - pre-checked for NULL 3024 jvmtiError 3025 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) { 3026 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3027 // get size of arguments 3028 3029 (*size_ptr) = method_oop->size_of_parameters(); 3030 return JVMTI_ERROR_NONE; 3031 } /* end GetArgumentsSize */ 3032 3033 3034 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3035 // entry_count_ptr - pre-checked for NULL 3036 // table_ptr - pre-checked for NULL 3037 jvmtiError 3038 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) { 3039 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3040 if (!method_oop->has_linenumber_table()) { 3041 return (JVMTI_ERROR_ABSENT_INFORMATION); 3042 } 3043 3044 // The line number table is compressed so we don't know how big it is until decompressed. 3045 // Decompression is really fast so we just do it twice. 3046 3047 // Compute size of table 3048 jint num_entries = 0; 3049 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 3050 while (stream.read_pair()) { 3051 num_entries++; 3052 } 3053 jvmtiLineNumberEntry *jvmti_table = 3054 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry))); 3055 3056 // Fill jvmti table 3057 if (num_entries > 0) { 3058 int index = 0; 3059 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 3060 while (stream.read_pair()) { 3061 jvmti_table[index].start_location = (jlocation) stream.bci(); 3062 jvmti_table[index].line_number = (jint) stream.line(); 3063 index++; 3064 } 3065 assert(index == num_entries, "sanity check"); 3066 } 3067 3068 // Set up results 3069 (*entry_count_ptr) = num_entries; 3070 (*table_ptr) = jvmti_table; 3071 3072 return JVMTI_ERROR_NONE; 3073 } /* end GetLineNumberTable */ 3074 3075 3076 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3077 // start_location_ptr - pre-checked for NULL 3078 // end_location_ptr - pre-checked for NULL 3079 jvmtiError 3080 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) { 3081 3082 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3083 // get start and end location 3084 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1); 3085 if (method_oop->code_size() == 0) { 3086 // there is no code so there is no start location 3087 (*start_location_ptr) = (jlocation)(-1); 3088 } else { 3089 (*start_location_ptr) = (jlocation)(0); 3090 } 3091 3092 return JVMTI_ERROR_NONE; 3093 } /* end GetMethodLocation */ 3094 3095 3096 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3097 // entry_count_ptr - pre-checked for NULL 3098 // table_ptr - pre-checked for NULL 3099 jvmtiError 3100 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) { 3101 3102 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3103 JavaThread* current_thread = JavaThread::current(); 3104 3105 // does the klass have any local variable information? 3106 InstanceKlass* ik = method_oop->method_holder(); 3107 if (!ik->access_flags().has_localvariable_table()) { 3108 return (JVMTI_ERROR_ABSENT_INFORMATION); 3109 } 3110 3111 ConstantPool* constants = method_oop->constants(); 3112 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION); 3113 3114 // in the vm localvariable table representation, 6 consecutive elements in the table 3115 // represent a 6-tuple of shorts 3116 // [start_pc, length, name_index, descriptor_index, signature_index, index] 3117 jint num_entries = method_oop->localvariable_table_length(); 3118 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *) 3119 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry))); 3120 3121 if (num_entries > 0) { 3122 LocalVariableTableElement* table = method_oop->localvariable_table_start(); 3123 for (int i = 0; i < num_entries; i++) { 3124 // get the 5 tuple information from the vm table 3125 jlocation start_location = (jlocation) table[i].start_bci; 3126 jint length = (jint) table[i].length; 3127 int name_index = (int) table[i].name_cp_index; 3128 int signature_index = (int) table[i].descriptor_cp_index; 3129 int generic_signature_index = (int) table[i].signature_cp_index; 3130 jint slot = (jint) table[i].slot; 3131 3132 // get utf8 name and signature 3133 char *name_buf = NULL; 3134 char *sig_buf = NULL; 3135 char *gen_sig_buf = NULL; 3136 { 3137 ResourceMark rm(current_thread); 3138 3139 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8(); 3140 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1); 3141 strcpy(name_buf, utf8_name); 3142 3143 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8(); 3144 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1); 3145 strcpy(sig_buf, utf8_signature); 3146 3147 if (generic_signature_index > 0) { 3148 const char *utf8_gen_sign = (const char *) 3149 constants->symbol_at(generic_signature_index)->as_utf8(); 3150 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1); 3151 strcpy(gen_sig_buf, utf8_gen_sign); 3152 } 3153 } 3154 3155 // fill in the jvmti local variable table 3156 jvmti_table[i].start_location = start_location; 3157 jvmti_table[i].length = length; 3158 jvmti_table[i].name = name_buf; 3159 jvmti_table[i].signature = sig_buf; 3160 jvmti_table[i].generic_signature = gen_sig_buf; 3161 jvmti_table[i].slot = slot; 3162 } 3163 } 3164 3165 // set results 3166 (*entry_count_ptr) = num_entries; 3167 (*table_ptr) = jvmti_table; 3168 3169 return JVMTI_ERROR_NONE; 3170 } /* end GetLocalVariableTable */ 3171 3172 3173 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3174 // bytecode_count_ptr - pre-checked for NULL 3175 // bytecodes_ptr - pre-checked for NULL 3176 jvmtiError 3177 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) { 3178 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3179 3180 HandleMark hm; 3181 methodHandle method(Thread::current(), method_oop); 3182 jint size = (jint)method->code_size(); 3183 jvmtiError err = allocate(size, bytecodes_ptr); 3184 if (err != JVMTI_ERROR_NONE) { 3185 return err; 3186 } 3187 3188 (*bytecode_count_ptr) = size; 3189 // get byte codes 3190 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr); 3191 3192 return JVMTI_ERROR_NONE; 3193 } /* end GetBytecodes */ 3194 3195 3196 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3197 // is_native_ptr - pre-checked for NULL 3198 jvmtiError 3199 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) { 3200 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3201 (*is_native_ptr) = method_oop->is_native(); 3202 return JVMTI_ERROR_NONE; 3203 } /* end IsMethodNative */ 3204 3205 3206 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3207 // is_synthetic_ptr - pre-checked for NULL 3208 jvmtiError 3209 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) { 3210 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3211 (*is_synthetic_ptr) = method_oop->is_synthetic(); 3212 return JVMTI_ERROR_NONE; 3213 } /* end IsMethodSynthetic */ 3214 3215 3216 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3217 // is_obsolete_ptr - pre-checked for NULL 3218 jvmtiError 3219 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) { 3220 if (use_version_1_0_semantics() && 3221 get_capabilities()->can_redefine_classes == 0) { 3222 // This JvmtiEnv requested version 1.0 semantics and this function 3223 // requires the can_redefine_classes capability in version 1.0 so 3224 // we need to return an error here. 3225 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3226 } 3227 3228 if (method_oop == NULL || method_oop->is_obsolete()) { 3229 *is_obsolete_ptr = true; 3230 } else { 3231 *is_obsolete_ptr = false; 3232 } 3233 return JVMTI_ERROR_NONE; 3234 } /* end IsMethodObsolete */ 3235 3236 // 3237 // Raw Monitor functions 3238 // 3239 3240 // name - pre-checked for NULL 3241 // monitor_ptr - pre-checked for NULL 3242 jvmtiError 3243 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) { 3244 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name); 3245 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY); 3246 3247 *monitor_ptr = (jrawMonitorID)rmonitor; 3248 3249 return JVMTI_ERROR_NONE; 3250 } /* end CreateRawMonitor */ 3251 3252 3253 // rmonitor - pre-checked for validity 3254 jvmtiError 3255 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) { 3256 if (Threads::number_of_threads() == 0) { 3257 // Remove this monitor from pending raw monitors list 3258 // if it has entered in onload or start phase. 3259 JvmtiPendingMonitors::destroy(rmonitor); 3260 } else { 3261 Thread* thread = Thread::current(); 3262 if (rmonitor->owner() == thread) { 3263 // The caller owns this monitor which we are about to destroy. 3264 // We exit the underlying synchronization object so that the 3265 // "delete monitor" call below can work without an assertion 3266 // failure on systems that don't like destroying synchronization 3267 // objects that are locked. 3268 int r; 3269 int recursion = rmonitor->recursions(); 3270 for (int i = 0; i <= recursion; i++) { 3271 r = rmonitor->raw_exit(thread); 3272 assert(r == JvmtiRawMonitor::M_OK, "raw_exit should have worked"); 3273 if (r != JvmtiRawMonitor::M_OK) { // robustness 3274 return JVMTI_ERROR_INTERNAL; 3275 } 3276 } 3277 } 3278 if (rmonitor->owner() != NULL) { 3279 // The caller is trying to destroy a monitor that is locked by 3280 // someone else. While this is not forbidden by the JVMTI 3281 // spec, it will cause an assertion failure on systems that don't 3282 // like destroying synchronization objects that are locked. 3283 // We indicate a problem with the error return (and leak the 3284 // monitor's memory). 3285 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3286 } 3287 } 3288 3289 delete rmonitor; 3290 3291 return JVMTI_ERROR_NONE; 3292 } /* end DestroyRawMonitor */ 3293 3294 3295 // rmonitor - pre-checked for validity 3296 jvmtiError 3297 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) { 3298 if (Threads::number_of_threads() == 0) { 3299 // No JavaThreads exist so JvmtiRawMonitor enter cannot be 3300 // used, add this raw monitor to the pending list. 3301 // The pending monitors will be actually entered when 3302 // the VM is setup. 3303 // See transition_pending_raw_monitors in create_vm() 3304 // in thread.cpp. 3305 JvmtiPendingMonitors::enter(rmonitor); 3306 } else { 3307 Thread* thread = Thread::current(); 3308 if (thread->is_Java_thread()) { 3309 JavaThread* current_thread = (JavaThread*)thread; 3310 3311 /* Transition to thread_blocked without entering vm state */ 3312 /* This is really evil. Normally you can't undo _thread_blocked */ 3313 /* transitions like this because it would cause us to miss a */ 3314 /* safepoint but since the thread was already in _thread_in_native */ 3315 /* the thread is not leaving a safepoint safe state and it will */ 3316 /* block when it tries to return from native. We can't safepoint */ 3317 /* block in here because we could deadlock the vmthread. Blech. */ 3318 3319 JavaThreadState state = current_thread->thread_state(); 3320 assert(state == _thread_in_native, "Must be _thread_in_native"); 3321 // frame should already be walkable since we are in native 3322 assert(!current_thread->has_last_Java_frame() || 3323 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3324 current_thread->set_thread_state(_thread_blocked); 3325 3326 rmonitor->raw_enter(current_thread); 3327 // restore state, still at a safepoint safe state 3328 current_thread->set_thread_state(state); 3329 } else { 3330 rmonitor->raw_enter(thread); 3331 } 3332 } 3333 return JVMTI_ERROR_NONE; 3334 } /* end RawMonitorEnter */ 3335 3336 3337 // rmonitor - pre-checked for validity 3338 jvmtiError 3339 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) { 3340 jvmtiError err = JVMTI_ERROR_NONE; 3341 3342 if (Threads::number_of_threads() == 0) { 3343 // No JavaThreads exist so just remove this monitor from the pending list. 3344 // Bool value from exit is false if rmonitor is not in the list. 3345 if (!JvmtiPendingMonitors::exit(rmonitor)) { 3346 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3347 } 3348 } else { 3349 Thread* thread = Thread::current(); 3350 int r = rmonitor->raw_exit(thread); 3351 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) { 3352 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3353 } 3354 } 3355 return err; 3356 } /* end RawMonitorExit */ 3357 3358 3359 // rmonitor - pre-checked for validity 3360 jvmtiError 3361 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) { 3362 Thread* thread = Thread::current(); 3363 int r = rmonitor->raw_wait(millis, thread); 3364 3365 switch (r) { 3366 case JvmtiRawMonitor::M_INTERRUPTED: 3367 return JVMTI_ERROR_INTERRUPT; 3368 case JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE: 3369 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3370 default: 3371 return JVMTI_ERROR_NONE; 3372 } 3373 } /* end RawMonitorWait */ 3374 3375 3376 // rmonitor - pre-checked for validity 3377 jvmtiError 3378 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) { 3379 Thread* thread = Thread::current(); 3380 int r = rmonitor->raw_notify(thread); 3381 3382 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) { 3383 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3384 } 3385 return JVMTI_ERROR_NONE; 3386 } /* end RawMonitorNotify */ 3387 3388 3389 // rmonitor - pre-checked for validity 3390 jvmtiError 3391 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) { 3392 Thread* thread = Thread::current(); 3393 int r = rmonitor->raw_notifyAll(thread); 3394 3395 if (r == JvmtiRawMonitor::M_ILLEGAL_MONITOR_STATE) { 3396 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3397 } 3398 return JVMTI_ERROR_NONE; 3399 } /* end RawMonitorNotifyAll */ 3400 3401 3402 // 3403 // JNI Function Interception functions 3404 // 3405 3406 3407 // function_table - pre-checked for NULL 3408 jvmtiError 3409 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) { 3410 // Copy jni function table at safepoint. 3411 VM_JNIFunctionTableCopier copier(function_table); 3412 VMThread::execute(&copier); 3413 3414 return JVMTI_ERROR_NONE; 3415 } /* end SetJNIFunctionTable */ 3416 3417 3418 // function_table - pre-checked for NULL 3419 jvmtiError 3420 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) { 3421 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface)); 3422 if (*function_table == NULL) 3423 return JVMTI_ERROR_OUT_OF_MEMORY; 3424 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface)); 3425 return JVMTI_ERROR_NONE; 3426 } /* end GetJNIFunctionTable */ 3427 3428 3429 // 3430 // Event Management functions 3431 // 3432 3433 jvmtiError 3434 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) { 3435 // can only generate two event types 3436 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD && 3437 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) { 3438 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3439 } 3440 3441 // for compiled_method_load events we must check that the environment 3442 // has the can_generate_compiled_method_load_events capability. 3443 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) { 3444 if (get_capabilities()->can_generate_compiled_method_load_events == 0) { 3445 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3446 } 3447 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this); 3448 } else { 3449 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this); 3450 } 3451 3452 } /* end GenerateEvents */ 3453 3454 3455 // 3456 // Extension Mechanism functions 3457 // 3458 3459 // extension_count_ptr - pre-checked for NULL 3460 // extensions - pre-checked for NULL 3461 jvmtiError 3462 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) { 3463 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions); 3464 } /* end GetExtensionFunctions */ 3465 3466 3467 // extension_count_ptr - pre-checked for NULL 3468 // extensions - pre-checked for NULL 3469 jvmtiError 3470 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) { 3471 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions); 3472 } /* end GetExtensionEvents */ 3473 3474 3475 // callback - NULL is a valid value, must be checked 3476 jvmtiError 3477 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) { 3478 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback); 3479 } /* end SetExtensionEventCallback */ 3480 3481 // 3482 // Timers functions 3483 // 3484 3485 // info_ptr - pre-checked for NULL 3486 jvmtiError 3487 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3488 os::current_thread_cpu_time_info(info_ptr); 3489 return JVMTI_ERROR_NONE; 3490 } /* end GetCurrentThreadCpuTimerInfo */ 3491 3492 3493 // nanos_ptr - pre-checked for NULL 3494 jvmtiError 3495 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) { 3496 *nanos_ptr = os::current_thread_cpu_time(); 3497 return JVMTI_ERROR_NONE; 3498 } /* end GetCurrentThreadCpuTime */ 3499 3500 3501 // info_ptr - pre-checked for NULL 3502 jvmtiError 3503 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3504 os::thread_cpu_time_info(info_ptr); 3505 return JVMTI_ERROR_NONE; 3506 } /* end GetThreadCpuTimerInfo */ 3507 3508 3509 // Threads_lock NOT held, java_thread not protected by lock 3510 // java_thread - pre-checked 3511 // nanos_ptr - pre-checked for NULL 3512 jvmtiError 3513 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) { 3514 *nanos_ptr = os::thread_cpu_time(java_thread); 3515 return JVMTI_ERROR_NONE; 3516 } /* end GetThreadCpuTime */ 3517 3518 3519 // info_ptr - pre-checked for NULL 3520 jvmtiError 3521 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) { 3522 os::javaTimeNanos_info(info_ptr); 3523 return JVMTI_ERROR_NONE; 3524 } /* end GetTimerInfo */ 3525 3526 3527 // nanos_ptr - pre-checked for NULL 3528 jvmtiError 3529 JvmtiEnv::GetTime(jlong* nanos_ptr) { 3530 *nanos_ptr = os::javaTimeNanos(); 3531 return JVMTI_ERROR_NONE; 3532 } /* end GetTime */ 3533 3534 3535 // processor_count_ptr - pre-checked for NULL 3536 jvmtiError 3537 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) { 3538 *processor_count_ptr = os::active_processor_count(); 3539 return JVMTI_ERROR_NONE; 3540 } /* end GetAvailableProcessors */ 3541 3542 jvmtiError 3543 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) { 3544 if (sampling_interval < 0) { 3545 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3546 } 3547 ThreadHeapSampler::set_sampling_interval(sampling_interval); 3548 return JVMTI_ERROR_NONE; 3549 } /* end SetHeapSamplingInterval */ 3550 3551 // 3552 // System Properties functions 3553 // 3554 3555 // count_ptr - pre-checked for NULL 3556 // property_ptr - pre-checked for NULL 3557 jvmtiError 3558 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) { 3559 jvmtiError err = JVMTI_ERROR_NONE; 3560 3561 // Get the number of readable properties. 3562 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties()); 3563 3564 // Allocate memory to hold the exact number of readable properties. 3565 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr); 3566 if (err != JVMTI_ERROR_NONE) { 3567 return err; 3568 } 3569 int readable_count = 0; 3570 // Loop through the system properties until all the readable properties are found. 3571 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) { 3572 if (p->is_readable()) { 3573 const char *key = p->key(); 3574 char **tmp_value = *property_ptr+readable_count; 3575 readable_count++; 3576 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value); 3577 if (err == JVMTI_ERROR_NONE) { 3578 strcpy(*tmp_value, key); 3579 } else { 3580 // clean up previously allocated memory. 3581 for (int j = 0; j < readable_count; j++) { 3582 Deallocate((unsigned char*)*property_ptr+j); 3583 } 3584 Deallocate((unsigned char*)property_ptr); 3585 break; 3586 } 3587 } 3588 } 3589 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count"); 3590 return err; 3591 } /* end GetSystemProperties */ 3592 3593 3594 // property - pre-checked for NULL 3595 // value_ptr - pre-checked for NULL 3596 jvmtiError 3597 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) { 3598 jvmtiError err = JVMTI_ERROR_NONE; 3599 const char *value; 3600 3601 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist. 3602 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property); 3603 if (value == NULL) { 3604 err = JVMTI_ERROR_NOT_AVAILABLE; 3605 } else { 3606 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr); 3607 if (err == JVMTI_ERROR_NONE) { 3608 strcpy(*value_ptr, value); 3609 } 3610 } 3611 return err; 3612 } /* end GetSystemProperty */ 3613 3614 3615 // property - pre-checked for NULL 3616 // value - NULL is a valid value, must be checked 3617 jvmtiError 3618 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) { 3619 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE; 3620 3621 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 3622 if (strcmp(property, p->key()) == 0) { 3623 if (p->set_writeable_value(value_ptr)) { 3624 err = JVMTI_ERROR_NONE; 3625 } 3626 } 3627 } 3628 return err; 3629 } /* end SetSystemProperty */