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