1 /* 2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/classLoaderExt.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/modules.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "interpreter/bytecodeStream.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "jvmtifiles/jvmtiEnv.hpp" 35 #include "logging/log.hpp" 36 #include "logging/logConfiguration.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.hpp" 39 #include "oops/instanceKlass.hpp" 40 #include "oops/objArrayOop.inline.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "prims/jniCheck.hpp" 43 #include "prims/jvm_misc.hpp" 44 #include "prims/jvmtiAgentThread.hpp" 45 #include "prims/jvmtiClassFileReconstituter.hpp" 46 #include "prims/jvmtiCodeBlobEvents.hpp" 47 #include "prims/jvmtiExtensions.hpp" 48 #include "prims/jvmtiGetLoadedClasses.hpp" 49 #include "prims/jvmtiImpl.hpp" 50 #include "prims/jvmtiManageCapabilities.hpp" 51 #include "prims/jvmtiRawMonitor.hpp" 52 #include "prims/jvmtiRedefineClasses.hpp" 53 #include "prims/jvmtiTagMap.hpp" 54 #include "prims/jvmtiThreadState.inline.hpp" 55 #include "prims/jvmtiUtil.hpp" 56 #include "runtime/arguments.hpp" 57 #include "runtime/deoptimization.hpp" 58 #include "runtime/interfaceSupport.inline.hpp" 59 #include "runtime/javaCalls.hpp" 60 #include "runtime/jfieldIDWorkaround.hpp" 61 #include "runtime/jniHandles.inline.hpp" 62 #include "runtime/objectMonitor.inline.hpp" 63 #include "runtime/osThread.hpp" 64 #include "runtime/reflectionUtils.hpp" 65 #include "runtime/signature.hpp" 66 #include "runtime/thread.inline.hpp" 67 #include "runtime/threadSMR.hpp" 68 #include "runtime/timerTrace.hpp" 69 #include "runtime/vframe.inline.hpp" 70 #include "runtime/vmThread.hpp" 71 #include "services/threadService.hpp" 72 #include "utilities/exceptions.hpp" 73 #include "utilities/preserveException.hpp" 74 75 76 #define FIXLATER 0 // REMOVE this when completed. 77 78 // FIXLATER: hook into JvmtiTrace 79 #define TraceJVMTICalls false 80 81 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) { 82 } 83 84 JvmtiEnv::~JvmtiEnv() { 85 } 86 87 JvmtiEnv* 88 JvmtiEnv::create_a_jvmti(jint version) { 89 return new JvmtiEnv(version); 90 } 91 92 // VM operation class to copy jni function table at safepoint. 93 // More than one java threads or jvmti agents may be reading/ 94 // modifying jni function tables. To reduce the risk of bad 95 // interaction b/w these threads it is copied at safepoint. 96 class VM_JNIFunctionTableCopier : public VM_Operation { 97 private: 98 const struct JNINativeInterface_ *_function_table; 99 public: 100 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) { 101 _function_table = func_tbl; 102 }; 103 104 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; } 105 void doit() { 106 copy_jni_function_table(_function_table); 107 }; 108 }; 109 110 // 111 // Do not change the "prefix" marker below, everything above it is copied 112 // unchanged into the filled stub, everything below is controlled by the 113 // stub filler (only method bodies are carried forward, and then only for 114 // functionality still in the spec). 115 // 116 // end file prefix 117 118 // 119 // Memory Management functions 120 // 121 122 // mem_ptr - pre-checked for NULL 123 jvmtiError 124 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) { 125 return allocate(size, mem_ptr); 126 } /* end Allocate */ 127 128 129 // mem - NULL is a valid value, must be checked 130 jvmtiError 131 JvmtiEnv::Deallocate(unsigned char* mem) { 132 return deallocate(mem); 133 } /* end Deallocate */ 134 135 // Threads_lock NOT held, java_thread not protected by lock 136 // java_thread - pre-checked 137 // data - NULL is a valid value, must be checked 138 jvmtiError 139 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) { 140 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 141 if (state == NULL) { 142 if (data == NULL) { 143 // leaving state unset same as data set to NULL 144 return JVMTI_ERROR_NONE; 145 } 146 // otherwise, create the state 147 state = JvmtiThreadState::state_for(java_thread); 148 if (state == NULL) { 149 return JVMTI_ERROR_THREAD_NOT_ALIVE; 150 } 151 } 152 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data); 153 return JVMTI_ERROR_NONE; 154 } /* end SetThreadLocalStorage */ 155 156 157 // Threads_lock NOT held 158 // thread - NOT pre-checked 159 // data_ptr - pre-checked for NULL 160 jvmtiError 161 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) { 162 JavaThread* current_thread = JavaThread::current(); 163 if (thread == NULL) { 164 JvmtiThreadState* state = current_thread->jvmti_thread_state(); 165 *data_ptr = (state == NULL) ? NULL : 166 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 167 } else { 168 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition 169 // the thread to _thread_in_vm. However, when the TLS for a thread 170 // other than the current thread is required we need to transition 171 // from native so as to resolve the jthread. 172 173 ThreadInVMfromNative __tiv(current_thread); 174 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread) 175 debug_only(VMNativeEntryWrapper __vew;) 176 177 JavaThread* java_thread = NULL; 178 ThreadsListHandle tlh(current_thread); 179 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL); 180 if (err != JVMTI_ERROR_NONE) { 181 return err; 182 } 183 184 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 185 *data_ptr = (state == NULL) ? NULL : 186 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 187 } 188 return JVMTI_ERROR_NONE; 189 } /* end GetThreadLocalStorage */ 190 191 // 192 // Module functions 193 // 194 195 // module_count_ptr - pre-checked for NULL 196 // modules_ptr - pre-checked for NULL 197 jvmtiError 198 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) { 199 JvmtiModuleClosure jmc; 200 201 return jmc.get_all_modules(this, module_count_ptr, modules_ptr); 202 } /* end GetAllModules */ 203 204 205 // class_loader - NULL is a valid value, must be pre-checked 206 // package_name - pre-checked for NULL 207 // module_ptr - pre-checked for NULL 208 jvmtiError 209 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) { 210 JavaThread* THREAD = JavaThread::current(); // pass to macros 211 ResourceMark rm(THREAD); 212 213 Handle h_loader (THREAD, JNIHandles::resolve(class_loader)); 214 // Check that loader is a subclass of java.lang.ClassLoader. 215 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) { 216 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 217 } 218 jobject module = Modules::get_named_module(h_loader, package_name, THREAD); 219 if (HAS_PENDING_EXCEPTION) { 220 CLEAR_PENDING_EXCEPTION; 221 return JVMTI_ERROR_INTERNAL; // unexpected exception 222 } 223 *module_ptr = module; 224 return JVMTI_ERROR_NONE; 225 } /* end GetNamedModule */ 226 227 228 // module - pre-checked for NULL 229 // to_module - pre-checked for NULL 230 jvmtiError 231 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) { 232 JavaThread* THREAD = JavaThread::current(); 233 234 // check module 235 Handle h_module(THREAD, JNIHandles::resolve(module)); 236 if (!java_lang_Module::is_instance(h_module())) { 237 return JVMTI_ERROR_INVALID_MODULE; 238 } 239 // check to_module 240 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 241 if (!java_lang_Module::is_instance(h_to_module())) { 242 return JVMTI_ERROR_INVALID_MODULE; 243 } 244 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD); 245 } /* end AddModuleReads */ 246 247 248 // module - pre-checked for NULL 249 // pkg_name - pre-checked for NULL 250 // to_module - pre-checked for NULL 251 jvmtiError 252 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) { 253 JavaThread* THREAD = JavaThread::current(); 254 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD); 255 256 // check module 257 Handle h_module(THREAD, JNIHandles::resolve(module)); 258 if (!java_lang_Module::is_instance(h_module())) { 259 return JVMTI_ERROR_INVALID_MODULE; 260 } 261 // check to_module 262 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 263 if (!java_lang_Module::is_instance(h_to_module())) { 264 return JVMTI_ERROR_INVALID_MODULE; 265 } 266 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD); 267 } /* end AddModuleExports */ 268 269 270 // module - pre-checked for NULL 271 // pkg_name - pre-checked for NULL 272 // to_module - pre-checked for NULL 273 jvmtiError 274 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) { 275 JavaThread* THREAD = JavaThread::current(); 276 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD); 277 278 // check module 279 Handle h_module(THREAD, JNIHandles::resolve(module)); 280 if (!java_lang_Module::is_instance(h_module())) { 281 return JVMTI_ERROR_INVALID_MODULE; 282 } 283 // check to_module 284 Handle h_to_module(THREAD, JNIHandles::resolve(to_module)); 285 if (!java_lang_Module::is_instance(h_to_module())) { 286 return JVMTI_ERROR_INVALID_MODULE; 287 } 288 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD); 289 } /* end AddModuleOpens */ 290 291 292 // module - pre-checked for NULL 293 // service - pre-checked for NULL 294 jvmtiError 295 JvmtiEnv::AddModuleUses(jobject module, jclass service) { 296 JavaThread* THREAD = JavaThread::current(); 297 298 // check module 299 Handle h_module(THREAD, JNIHandles::resolve(module)); 300 if (!java_lang_Module::is_instance(h_module())) { 301 return JVMTI_ERROR_INVALID_MODULE; 302 } 303 // check service 304 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service)); 305 if (!java_lang_Class::is_instance(h_service()) || 306 java_lang_Class::is_primitive(h_service())) { 307 return JVMTI_ERROR_INVALID_CLASS; 308 } 309 return JvmtiExport::add_module_uses(h_module, h_service, THREAD); 310 } /* end AddModuleUses */ 311 312 313 // module - pre-checked for NULL 314 // service - pre-checked for NULL 315 // impl_class - pre-checked for NULL 316 jvmtiError 317 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) { 318 JavaThread* THREAD = JavaThread::current(); 319 320 // check module 321 Handle h_module(THREAD, JNIHandles::resolve(module)); 322 if (!java_lang_Module::is_instance(h_module())) { 323 return JVMTI_ERROR_INVALID_MODULE; 324 } 325 // check service 326 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service)); 327 if (!java_lang_Class::is_instance(h_service()) || 328 java_lang_Class::is_primitive(h_service())) { 329 return JVMTI_ERROR_INVALID_CLASS; 330 } 331 // check impl_class 332 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class)); 333 if (!java_lang_Class::is_instance(h_impl_class()) || 334 java_lang_Class::is_primitive(h_impl_class())) { 335 return JVMTI_ERROR_INVALID_CLASS; 336 } 337 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD); 338 } /* end AddModuleProvides */ 339 340 // module - pre-checked for NULL 341 // is_modifiable_class_ptr - pre-checked for NULL 342 jvmtiError 343 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) { 344 JavaThread* THREAD = JavaThread::current(); 345 346 // check module 347 Handle h_module(THREAD, JNIHandles::resolve(module)); 348 if (!java_lang_Module::is_instance(h_module())) { 349 return JVMTI_ERROR_INVALID_MODULE; 350 } 351 352 *is_modifiable_module_ptr = JNI_TRUE; 353 return JVMTI_ERROR_NONE; 354 } /* end IsModifiableModule */ 355 356 357 // 358 // Class functions 359 // 360 361 // class_count_ptr - pre-checked for NULL 362 // classes_ptr - pre-checked for NULL 363 jvmtiError 364 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) { 365 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr); 366 } /* end GetLoadedClasses */ 367 368 369 // initiating_loader - NULL is a valid value, must be checked 370 // class_count_ptr - pre-checked for NULL 371 // classes_ptr - pre-checked for NULL 372 jvmtiError 373 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) { 374 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader, 375 class_count_ptr, classes_ptr); 376 } /* end GetClassLoaderClasses */ 377 378 // k_mirror - may be primitive, this must be checked 379 // is_modifiable_class_ptr - pre-checked for NULL 380 jvmtiError 381 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) { 382 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)? 383 JNI_TRUE : JNI_FALSE; 384 return JVMTI_ERROR_NONE; 385 } /* end IsModifiableClass */ 386 387 // class_count - pre-checked to be greater than or equal to 0 388 // classes - pre-checked for NULL 389 jvmtiError 390 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) { 391 //TODO: add locking 392 393 int index; 394 JavaThread* current_thread = JavaThread::current(); 395 ResourceMark rm(current_thread); 396 397 jvmtiClassDefinition* class_definitions = 398 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count); 399 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY); 400 401 for (index = 0; index < class_count; index++) { 402 HandleMark hm(current_thread); 403 404 jclass jcls = classes[index]; 405 oop k_mirror = JNIHandles::resolve_external_guard(jcls); 406 if (k_mirror == NULL) { 407 return JVMTI_ERROR_INVALID_CLASS; 408 } 409 if (!k_mirror->is_a(SystemDictionary::Class_klass())) { 410 return JVMTI_ERROR_INVALID_CLASS; 411 } 412 413 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) { 414 return JVMTI_ERROR_UNMODIFIABLE_CLASS; 415 } 416 417 Klass* klass = java_lang_Class::as_Klass(k_mirror); 418 419 jint status = klass->jvmti_class_status(); 420 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 421 return JVMTI_ERROR_INVALID_CLASS; 422 } 423 424 InstanceKlass* ik = InstanceKlass::cast(klass); 425 if (ik->get_cached_class_file_bytes() == NULL) { 426 // Not cached, we need to reconstitute the class file from the 427 // VM representation. We don't attach the reconstituted class 428 // bytes to the InstanceKlass here because they have not been 429 // validated and we're not at a safepoint. 430 JvmtiClassFileReconstituter reconstituter(ik); 431 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 432 return reconstituter.get_error(); 433 } 434 435 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size(); 436 class_definitions[index].class_bytes = (unsigned char*) 437 reconstituter.class_file_bytes(); 438 } else { 439 // it is cached, get it from the cache 440 class_definitions[index].class_byte_count = ik->get_cached_class_file_len(); 441 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes(); 442 } 443 class_definitions[index].klass = jcls; 444 } 445 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform); 446 VMThread::execute(&op); 447 return (op.check_error()); 448 } /* end RetransformClasses */ 449 450 451 // class_count - pre-checked to be greater than or equal to 0 452 // class_definitions - pre-checked for NULL 453 jvmtiError 454 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) { 455 //TODO: add locking 456 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine); 457 VMThread::execute(&op); 458 return (op.check_error()); 459 } /* end RedefineClasses */ 460 461 462 // 463 // Object functions 464 // 465 466 // size_ptr - pre-checked for NULL 467 jvmtiError 468 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) { 469 oop mirror = JNIHandles::resolve_external_guard(object); 470 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 471 *size_ptr = (jlong)mirror->size() * wordSize; 472 return JVMTI_ERROR_NONE; 473 } /* end GetObjectSize */ 474 475 // 476 // Method functions 477 // 478 479 // prefix - NULL is a valid value, must be checked 480 jvmtiError 481 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) { 482 return prefix == NULL? 483 SetNativeMethodPrefixes(0, NULL) : 484 SetNativeMethodPrefixes(1, (char**)&prefix); 485 } /* end SetNativeMethodPrefix */ 486 487 488 // prefix_count - pre-checked to be greater than or equal to 0 489 // prefixes - pre-checked for NULL 490 jvmtiError 491 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) { 492 // Have to grab JVMTI thread state lock to be sure that some thread 493 // isn't accessing the prefixes at the same time we are setting them. 494 // No locks during VM bring-up. 495 if (Threads::number_of_threads() == 0) { 496 return set_native_method_prefixes(prefix_count, prefixes); 497 } else { 498 MutexLocker mu(JvmtiThreadState_lock); 499 return set_native_method_prefixes(prefix_count, prefixes); 500 } 501 } /* end SetNativeMethodPrefixes */ 502 503 // 504 // Event Management functions 505 // 506 507 // callbacks - NULL is a valid value, must be checked 508 // size_of_callbacks - pre-checked to be greater than or equal to 0 509 jvmtiError 510 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) { 511 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks); 512 return JVMTI_ERROR_NONE; 513 } /* end SetEventCallbacks */ 514 515 516 // event_thread - NULL is a valid value, must be checked 517 jvmtiError 518 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) { 519 if (event_thread == NULL) { 520 // Can be called at Agent_OnLoad() time with event_thread == NULL 521 // when Thread::current() does not work yet so we cannot create a 522 // ThreadsListHandle that is common to both thread-specific and 523 // global code paths. 524 525 // event_type must be valid 526 if (!JvmtiEventController::is_valid_event_type(event_type)) { 527 return JVMTI_ERROR_INVALID_EVENT_TYPE; 528 } 529 530 bool enabled = (mode == JVMTI_ENABLE); 531 532 // assure that needed capabilities are present 533 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { 534 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 535 } 536 537 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { 538 record_class_file_load_hook_enabled(); 539 } 540 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled); 541 } else { 542 // We have a specified event_thread. 543 544 JavaThread* java_thread = NULL; 545 ThreadsListHandle tlh; 546 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL); 547 if (err != JVMTI_ERROR_NONE) { 548 return err; 549 } 550 551 // event_type must be valid 552 if (!JvmtiEventController::is_valid_event_type(event_type)) { 553 return JVMTI_ERROR_INVALID_EVENT_TYPE; 554 } 555 556 // global events cannot be controlled at thread level. 557 if (JvmtiEventController::is_global_event(event_type)) { 558 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 559 } 560 561 bool enabled = (mode == JVMTI_ENABLE); 562 563 // assure that needed capabilities are present 564 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { 565 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 566 } 567 568 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { 569 record_class_file_load_hook_enabled(); 570 } 571 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled); 572 } 573 574 return JVMTI_ERROR_NONE; 575 } /* end SetEventNotificationMode */ 576 577 // 578 // Capability functions 579 // 580 581 // capabilities_ptr - pre-checked for NULL 582 jvmtiError 583 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) { 584 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(), 585 get_prohibited_capabilities(), 586 capabilities_ptr); 587 return JVMTI_ERROR_NONE; 588 } /* end GetPotentialCapabilities */ 589 590 591 // capabilities_ptr - pre-checked for NULL 592 jvmtiError 593 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) { 594 return JvmtiManageCapabilities::add_capabilities(get_capabilities(), 595 get_prohibited_capabilities(), 596 capabilities_ptr, 597 get_capabilities()); 598 } /* end AddCapabilities */ 599 600 601 // capabilities_ptr - pre-checked for NULL 602 jvmtiError 603 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) { 604 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities()); 605 return JVMTI_ERROR_NONE; 606 } /* end RelinquishCapabilities */ 607 608 609 // capabilities_ptr - pre-checked for NULL 610 jvmtiError 611 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) { 612 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr); 613 return JVMTI_ERROR_NONE; 614 } /* end GetCapabilities */ 615 616 // 617 // Class Loader Search functions 618 // 619 620 // segment - pre-checked for NULL 621 jvmtiError 622 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) { 623 jvmtiPhase phase = get_phase(); 624 if (phase == JVMTI_PHASE_ONLOAD) { 625 Arguments::append_sysclasspath(segment); 626 return JVMTI_ERROR_NONE; 627 } else if (use_version_1_0_semantics()) { 628 // This JvmtiEnv requested version 1.0 semantics and this function 629 // is only allowed in the ONLOAD phase in version 1.0 so we need to 630 // return an error here. 631 return JVMTI_ERROR_WRONG_PHASE; 632 } else if (phase == JVMTI_PHASE_LIVE) { 633 // The phase is checked by the wrapper that called this function, 634 // but this thread could be racing with the thread that is 635 // terminating the VM so we check one more time. 636 637 // create the zip entry 638 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true); 639 if (zip_entry == NULL) { 640 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 641 } 642 643 // lock the loader 644 Thread* thread = Thread::current(); 645 HandleMark hm; 646 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock()); 647 648 ObjectLocker ol(loader_lock, thread); 649 650 // add the jar file to the bootclasspath 651 log_info(class, load)("opened: %s", zip_entry->name()); 652 ClassLoaderExt::append_boot_classpath(zip_entry); 653 return JVMTI_ERROR_NONE; 654 } else { 655 return JVMTI_ERROR_WRONG_PHASE; 656 } 657 658 } /* end AddToBootstrapClassLoaderSearch */ 659 660 661 // segment - pre-checked for NULL 662 jvmtiError 663 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) { 664 jvmtiPhase phase = get_phase(); 665 666 if (phase == JVMTI_PHASE_ONLOAD) { 667 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 668 if (strcmp("java.class.path", p->key()) == 0) { 669 p->append_value(segment); 670 break; 671 } 672 } 673 return JVMTI_ERROR_NONE; 674 } else if (phase == JVMTI_PHASE_LIVE) { 675 // The phase is checked by the wrapper that called this function, 676 // but this thread could be racing with the thread that is 677 // terminating the VM so we check one more time. 678 HandleMark hm; 679 680 // create the zip entry (which will open the zip file and hence 681 // check that the segment is indeed a zip file). 682 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false); 683 if (zip_entry == NULL) { 684 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 685 } 686 delete zip_entry; // no longer needed 687 688 // lock the loader 689 Thread* THREAD = Thread::current(); 690 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 691 692 ObjectLocker ol(loader, THREAD); 693 694 // need the path as java.lang.String 695 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD); 696 if (HAS_PENDING_EXCEPTION) { 697 CLEAR_PENDING_EXCEPTION; 698 return JVMTI_ERROR_INTERNAL; 699 } 700 701 // Invoke the appendToClassPathForInstrumentation method - if the method 702 // is not found it means the loader doesn't support adding to the class path 703 // in the live phase. 704 { 705 JavaValue res(T_VOID); 706 JavaCalls::call_special(&res, 707 loader, 708 loader->klass(), 709 vmSymbols::appendToClassPathForInstrumentation_name(), 710 vmSymbols::appendToClassPathForInstrumentation_signature(), 711 path, 712 THREAD); 713 if (HAS_PENDING_EXCEPTION) { 714 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 715 CLEAR_PENDING_EXCEPTION; 716 717 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) { 718 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED; 719 } else { 720 return JVMTI_ERROR_INTERNAL; 721 } 722 } 723 } 724 725 return JVMTI_ERROR_NONE; 726 } else { 727 return JVMTI_ERROR_WRONG_PHASE; 728 } 729 } /* end AddToSystemClassLoaderSearch */ 730 731 // 732 // General functions 733 // 734 735 // phase_ptr - pre-checked for NULL 736 jvmtiError 737 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) { 738 *phase_ptr = phase(); 739 return JVMTI_ERROR_NONE; 740 } /* end GetPhase */ 741 742 743 jvmtiError 744 JvmtiEnv::DisposeEnvironment() { 745 dispose(); 746 return JVMTI_ERROR_NONE; 747 } /* end DisposeEnvironment */ 748 749 750 // data - NULL is a valid value, must be checked 751 jvmtiError 752 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) { 753 set_env_local_storage(data); 754 return JVMTI_ERROR_NONE; 755 } /* end SetEnvironmentLocalStorage */ 756 757 758 // data_ptr - pre-checked for NULL 759 jvmtiError 760 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) { 761 *data_ptr = (void*)get_env_local_storage(); 762 return JVMTI_ERROR_NONE; 763 } /* end GetEnvironmentLocalStorage */ 764 765 // version_ptr - pre-checked for NULL 766 jvmtiError 767 JvmtiEnv::GetVersionNumber(jint* version_ptr) { 768 *version_ptr = JVMTI_VERSION; 769 return JVMTI_ERROR_NONE; 770 } /* end GetVersionNumber */ 771 772 773 // name_ptr - pre-checked for NULL 774 jvmtiError 775 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) { 776 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) { 777 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 778 } 779 const char *name = JvmtiUtil::error_name(error); 780 if (name == NULL) { 781 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 782 } 783 size_t len = strlen(name) + 1; 784 jvmtiError err = allocate(len, (unsigned char**)name_ptr); 785 if (err == JVMTI_ERROR_NONE) { 786 memcpy(*name_ptr, name, len); 787 } 788 return err; 789 } /* end GetErrorName */ 790 791 792 jvmtiError 793 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) { 794 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info; 795 switch (flag) { 796 case JVMTI_VERBOSE_OTHER: 797 // ignore 798 break; 799 case JVMTI_VERBOSE_CLASS: 800 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload)); 801 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load)); 802 break; 803 case JVMTI_VERBOSE_GC: 804 if (value == 0) { 805 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc)); 806 } else { 807 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc)); 808 } 809 break; 810 case JVMTI_VERBOSE_JNI: 811 PrintJNIResolving = value != 0; 812 break; 813 default: 814 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 815 }; 816 return JVMTI_ERROR_NONE; 817 } /* end SetVerboseFlag */ 818 819 820 // format_ptr - pre-checked for NULL 821 jvmtiError 822 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) { 823 *format_ptr = JVMTI_JLOCATION_JVMBCI; 824 return JVMTI_ERROR_NONE; 825 } /* end GetJLocationFormat */ 826 827 // 828 // Thread functions 829 // 830 831 // Threads_lock NOT held 832 // thread - NOT pre-checked 833 // thread_state_ptr - pre-checked for NULL 834 jvmtiError 835 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) { 836 JavaThread* current_thread = JavaThread::current(); 837 JavaThread* java_thread = NULL; 838 oop thread_oop = NULL; 839 ThreadsListHandle tlh(current_thread); 840 841 if (thread == NULL) { 842 java_thread = current_thread; 843 thread_oop = java_thread->threadObj(); 844 845 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 846 return JVMTI_ERROR_INVALID_THREAD; 847 } 848 } else { 849 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 850 if (err != JVMTI_ERROR_NONE) { 851 // We got an error code so we don't have a JavaThread *, but 852 // only return an error from here if we didn't get a valid 853 // thread_oop. 854 if (thread_oop == NULL) { 855 return err; 856 } 857 // We have a valid thread_oop so we can return some thread state. 858 } 859 } 860 861 // get most state bits 862 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop); 863 864 if (java_thread != NULL) { 865 // We have a JavaThread* so add more state bits. 866 JavaThreadState jts = java_thread->thread_state(); 867 868 if (java_thread->is_being_ext_suspended()) { 869 state |= JVMTI_THREAD_STATE_SUSPENDED; 870 } 871 if (jts == _thread_in_native) { 872 state |= JVMTI_THREAD_STATE_IN_NATIVE; 873 } 874 OSThread* osThread = java_thread->osthread(); 875 if (osThread != NULL && osThread->interrupted()) { 876 state |= JVMTI_THREAD_STATE_INTERRUPTED; 877 } 878 } 879 880 *thread_state_ptr = state; 881 return JVMTI_ERROR_NONE; 882 } /* end GetThreadState */ 883 884 885 // thread_ptr - pre-checked for NULL 886 jvmtiError 887 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) { 888 JavaThread* current_thread = JavaThread::current(); 889 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj()); 890 return JVMTI_ERROR_NONE; 891 } /* end GetCurrentThread */ 892 893 894 // threads_count_ptr - pre-checked for NULL 895 // threads_ptr - pre-checked for NULL 896 jvmtiError 897 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) { 898 int nthreads = 0; 899 Handle *thread_objs = NULL; 900 ResourceMark rm; 901 HandleMark hm; 902 903 // enumerate threads (including agent threads) 904 ThreadsListEnumerator tle(Thread::current(), true); 905 nthreads = tle.num_threads(); 906 *threads_count_ptr = nthreads; 907 908 if (nthreads == 0) { 909 *threads_ptr = NULL; 910 return JVMTI_ERROR_NONE; 911 } 912 913 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads); 914 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY); 915 916 for (int i=0; i < nthreads; i++) { 917 thread_objs[i] = Handle(tle.get_threadObj(i)); 918 } 919 920 jthread *jthreads = new_jthreadArray(nthreads, thread_objs); 921 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY); 922 923 *threads_ptr = jthreads; 924 return JVMTI_ERROR_NONE; 925 } /* end GetAllThreads */ 926 927 928 // Threads_lock NOT held, java_thread not protected by lock 929 // java_thread - pre-checked 930 jvmtiError 931 JvmtiEnv::SuspendThread(JavaThread* java_thread) { 932 // don't allow hidden thread suspend request. 933 if (java_thread->is_hidden_from_external_view()) { 934 return (JVMTI_ERROR_NONE); 935 } 936 937 { 938 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 939 if (java_thread->is_external_suspend()) { 940 // don't allow nested external suspend requests. 941 return (JVMTI_ERROR_THREAD_SUSPENDED); 942 } 943 if (java_thread->is_exiting()) { // thread is in the process of exiting 944 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 945 } 946 java_thread->set_external_suspend(); 947 } 948 949 if (!JvmtiSuspendControl::suspend(java_thread)) { 950 // the thread was in the process of exiting 951 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 952 } 953 return JVMTI_ERROR_NONE; 954 } /* end SuspendThread */ 955 956 957 // request_count - pre-checked to be greater than or equal to 0 958 // request_list - pre-checked for NULL 959 // results - pre-checked for NULL 960 jvmtiError 961 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 962 int needSafepoint = 0; // > 0 if we need a safepoint 963 ThreadsListHandle tlh; 964 for (int i = 0; i < request_count; i++) { 965 JavaThread *java_thread = NULL; 966 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL); 967 if (err != JVMTI_ERROR_NONE) { 968 results[i] = err; 969 continue; 970 } 971 // don't allow hidden thread suspend request. 972 if (java_thread->is_hidden_from_external_view()) { 973 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 974 continue; 975 } 976 977 { 978 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 979 if (java_thread->is_external_suspend()) { 980 // don't allow nested external suspend requests. 981 results[i] = JVMTI_ERROR_THREAD_SUSPENDED; 982 continue; 983 } 984 if (java_thread->is_exiting()) { // thread is in the process of exiting 985 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 986 continue; 987 } 988 java_thread->set_external_suspend(); 989 } 990 if (java_thread->thread_state() == _thread_in_native) { 991 // We need to try and suspend native threads here. Threads in 992 // other states will self-suspend on their next transition. 993 if (!JvmtiSuspendControl::suspend(java_thread)) { 994 // The thread was in the process of exiting. Force another 995 // safepoint to make sure that this thread transitions. 996 needSafepoint++; 997 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 998 continue; 999 } 1000 } else { 1001 needSafepoint++; 1002 } 1003 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 1004 } 1005 if (needSafepoint > 0) { 1006 VM_ThreadsSuspendJVMTI tsj; 1007 VMThread::execute(&tsj); 1008 } 1009 // per-thread suspend results returned via results parameter 1010 return JVMTI_ERROR_NONE; 1011 } /* end SuspendThreadList */ 1012 1013 1014 // Threads_lock NOT held, java_thread not protected by lock 1015 // java_thread - pre-checked 1016 jvmtiError 1017 JvmtiEnv::ResumeThread(JavaThread* java_thread) { 1018 // don't allow hidden thread resume request. 1019 if (java_thread->is_hidden_from_external_view()) { 1020 return JVMTI_ERROR_NONE; 1021 } 1022 1023 if (!java_thread->is_being_ext_suspended()) { 1024 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1025 } 1026 1027 if (!JvmtiSuspendControl::resume(java_thread)) { 1028 return JVMTI_ERROR_INTERNAL; 1029 } 1030 return JVMTI_ERROR_NONE; 1031 } /* end ResumeThread */ 1032 1033 1034 // request_count - pre-checked to be greater than or equal to 0 1035 // request_list - pre-checked for NULL 1036 // results - pre-checked for NULL 1037 jvmtiError 1038 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 1039 ThreadsListHandle tlh; 1040 for (int i = 0; i < request_count; i++) { 1041 JavaThread* java_thread = NULL; 1042 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL); 1043 if (err != JVMTI_ERROR_NONE) { 1044 results[i] = err; 1045 continue; 1046 } 1047 // don't allow hidden thread resume request. 1048 if (java_thread->is_hidden_from_external_view()) { 1049 results[i] = JVMTI_ERROR_NONE; // indicate successful resume 1050 continue; 1051 } 1052 if (!java_thread->is_being_ext_suspended()) { 1053 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1054 continue; 1055 } 1056 1057 if (!JvmtiSuspendControl::resume(java_thread)) { 1058 results[i] = JVMTI_ERROR_INTERNAL; 1059 continue; 1060 } 1061 1062 results[i] = JVMTI_ERROR_NONE; // indicate successful resume 1063 } 1064 // per-thread resume results returned via results parameter 1065 return JVMTI_ERROR_NONE; 1066 } /* end ResumeThreadList */ 1067 1068 1069 // Threads_lock NOT held, java_thread not protected by lock 1070 // java_thread - pre-checked 1071 jvmtiError 1072 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) { 1073 oop e = JNIHandles::resolve_external_guard(exception); 1074 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER); 1075 1076 JavaThread::send_async_exception(java_thread->threadObj(), e); 1077 1078 return JVMTI_ERROR_NONE; 1079 1080 } /* end StopThread */ 1081 1082 1083 // Threads_lock NOT held 1084 // thread - NOT pre-checked 1085 jvmtiError 1086 JvmtiEnv::InterruptThread(jthread thread) { 1087 // TODO: this is very similar to JVM_Interrupt(); share code in future 1088 JavaThread* current_thread = JavaThread::current(); 1089 JavaThread* java_thread = NULL; 1090 ThreadsListHandle tlh(current_thread); 1091 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL); 1092 if (err != JVMTI_ERROR_NONE) { 1093 return err; 1094 } 1095 1096 Thread::interrupt(java_thread); 1097 1098 return JVMTI_ERROR_NONE; 1099 } /* end InterruptThread */ 1100 1101 1102 // Threads_lock NOT held 1103 // thread - NOT pre-checked 1104 // info_ptr - pre-checked for NULL 1105 jvmtiError 1106 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) { 1107 ResourceMark rm; 1108 HandleMark hm; 1109 1110 JavaThread* current_thread = JavaThread::current(); 1111 ThreadsListHandle tlh(current_thread); 1112 1113 // if thread is NULL the current thread is used 1114 oop thread_oop = NULL; 1115 if (thread == NULL) { 1116 thread_oop = current_thread->threadObj(); 1117 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 1118 return JVMTI_ERROR_INVALID_THREAD; 1119 } 1120 } else { 1121 JavaThread* java_thread = NULL; 1122 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1123 if (err != JVMTI_ERROR_NONE) { 1124 // We got an error code so we don't have a JavaThread *, but 1125 // only return an error from here if we didn't get a valid 1126 // thread_oop. 1127 if (thread_oop == NULL) { 1128 return err; 1129 } 1130 // We have a valid thread_oop so we can return some thread info. 1131 } 1132 } 1133 1134 Handle thread_obj(current_thread, thread_oop); 1135 Handle name; 1136 ThreadPriority priority; 1137 Handle thread_group; 1138 Handle context_class_loader; 1139 bool is_daemon; 1140 1141 { MutexLocker mu(Threads_lock); 1142 1143 name = Handle(current_thread, java_lang_Thread::name(thread_obj())); 1144 priority = java_lang_Thread::priority(thread_obj()); 1145 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj())); 1146 is_daemon = java_lang_Thread::is_daemon(thread_obj()); 1147 1148 oop loader = java_lang_Thread::context_class_loader(thread_obj()); 1149 context_class_loader = Handle(current_thread, loader); 1150 } 1151 { const char *n; 1152 1153 if (name() != NULL) { 1154 n = java_lang_String::as_utf8_string(name()); 1155 } else { 1156 int utf8_length = 0; 1157 n = UNICODE::as_utf8((jchar*) NULL, utf8_length); 1158 } 1159 1160 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1); 1161 if (info_ptr->name == NULL) 1162 return JVMTI_ERROR_OUT_OF_MEMORY; 1163 1164 strcpy(info_ptr->name, n); 1165 } 1166 info_ptr->is_daemon = is_daemon; 1167 info_ptr->priority = priority; 1168 1169 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL : 1170 jni_reference(context_class_loader); 1171 info_ptr->thread_group = jni_reference(thread_group); 1172 1173 return JVMTI_ERROR_NONE; 1174 } /* end GetThreadInfo */ 1175 1176 1177 // Threads_lock NOT held, java_thread not protected by lock 1178 // java_thread - pre-checked 1179 // owned_monitor_count_ptr - pre-checked for NULL 1180 // owned_monitors_ptr - pre-checked for NULL 1181 jvmtiError 1182 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) { 1183 jvmtiError err = JVMTI_ERROR_NONE; 1184 JavaThread* calling_thread = JavaThread::current(); 1185 1186 // growable array of jvmti monitors info on the C-heap 1187 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1188 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 1189 1190 // It is only safe to perform the direct operation on the current 1191 // thread. All other usage needs to use a vm-safepoint-op for safety. 1192 if (java_thread == calling_thread) { 1193 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1194 } else { 1195 // JVMTI get monitors info at safepoint. Do not require target thread to 1196 // be suspended. 1197 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); 1198 VMThread::execute(&op); 1199 err = op.result(); 1200 } 1201 jint owned_monitor_count = owned_monitors_list->length(); 1202 if (err == JVMTI_ERROR_NONE) { 1203 if ((err = allocate(owned_monitor_count * sizeof(jobject *), 1204 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) { 1205 // copy into the returned array 1206 for (int i = 0; i < owned_monitor_count; i++) { 1207 (*owned_monitors_ptr)[i] = 1208 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1209 } 1210 *owned_monitor_count_ptr = owned_monitor_count; 1211 } 1212 } 1213 // clean up. 1214 for (int i = 0; i < owned_monitor_count; i++) { 1215 deallocate((unsigned char*)owned_monitors_list->at(i)); 1216 } 1217 delete owned_monitors_list; 1218 1219 return err; 1220 } /* end GetOwnedMonitorInfo */ 1221 1222 1223 // Threads_lock NOT held, java_thread not protected by lock 1224 // java_thread - pre-checked 1225 // monitor_info_count_ptr - pre-checked for NULL 1226 // monitor_info_ptr - pre-checked for NULL 1227 jvmtiError 1228 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) { 1229 jvmtiError err = JVMTI_ERROR_NONE; 1230 JavaThread* calling_thread = JavaThread::current(); 1231 1232 // growable array of jvmti monitors info on the C-heap 1233 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1234 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 1235 1236 // It is only safe to perform the direct operation on the current 1237 // thread. All other usage needs to use a vm-safepoint-op for safety. 1238 if (java_thread == calling_thread) { 1239 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1240 } else { 1241 // JVMTI get owned monitors info at safepoint. Do not require target thread to 1242 // be suspended. 1243 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); 1244 VMThread::execute(&op); 1245 err = op.result(); 1246 } 1247 1248 jint owned_monitor_count = owned_monitors_list->length(); 1249 if (err == JVMTI_ERROR_NONE) { 1250 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo), 1251 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) { 1252 // copy to output array. 1253 for (int i = 0; i < owned_monitor_count; i++) { 1254 (*monitor_info_ptr)[i].monitor = 1255 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1256 (*monitor_info_ptr)[i].stack_depth = 1257 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth; 1258 } 1259 } 1260 *monitor_info_count_ptr = owned_monitor_count; 1261 } 1262 1263 // clean up. 1264 for (int i = 0; i < owned_monitor_count; i++) { 1265 deallocate((unsigned char*)owned_monitors_list->at(i)); 1266 } 1267 delete owned_monitors_list; 1268 1269 return err; 1270 } /* end GetOwnedMonitorStackDepthInfo */ 1271 1272 1273 // Threads_lock NOT held, java_thread not protected by lock 1274 // java_thread - pre-checked 1275 // monitor_ptr - pre-checked for NULL 1276 jvmtiError 1277 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) { 1278 jvmtiError err = JVMTI_ERROR_NONE; 1279 JavaThread* calling_thread = JavaThread::current(); 1280 1281 // It is only safe to perform the direct operation on the current 1282 // thread. All other usage needs to use a vm-safepoint-op for safety. 1283 if (java_thread == calling_thread) { 1284 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr); 1285 } else { 1286 // get contended monitor information at safepoint. 1287 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr); 1288 VMThread::execute(&op); 1289 err = op.result(); 1290 } 1291 return err; 1292 } /* end GetCurrentContendedMonitor */ 1293 1294 1295 // Threads_lock NOT held 1296 // thread - NOT pre-checked 1297 // proc - pre-checked for NULL 1298 // arg - NULL is a valid value, must be checked 1299 jvmtiError 1300 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) { 1301 JavaThread* current_thread = JavaThread::current(); 1302 1303 JavaThread* java_thread = NULL; 1304 oop thread_oop = NULL; 1305 ThreadsListHandle tlh(current_thread); 1306 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop); 1307 if (err != JVMTI_ERROR_NONE) { 1308 // We got an error code so we don't have a JavaThread *, but 1309 // only return an error from here if we didn't get a valid 1310 // thread_oop. 1311 if (thread_oop == NULL) { 1312 return err; 1313 } 1314 // We have a valid thread_oop. 1315 } 1316 1317 if (java_thread != NULL) { 1318 // 'thread' refers to an existing JavaThread. 1319 return JVMTI_ERROR_INVALID_THREAD; 1320 } 1321 1322 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) { 1323 return JVMTI_ERROR_INVALID_PRIORITY; 1324 } 1325 1326 Handle thread_hndl(current_thread, thread_oop); 1327 { 1328 MutexLocker mu(Threads_lock); // grab Threads_lock 1329 1330 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg); 1331 1332 // At this point it may be possible that no osthread was created for the 1333 // JavaThread due to lack of memory. 1334 if (new_thread == NULL || new_thread->osthread() == NULL) { 1335 if (new_thread != NULL) { 1336 new_thread->smr_delete(); 1337 } 1338 return JVMTI_ERROR_OUT_OF_MEMORY; 1339 } 1340 1341 java_lang_Thread::set_thread(thread_hndl(), new_thread); 1342 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority); 1343 java_lang_Thread::set_daemon(thread_hndl()); 1344 1345 new_thread->set_threadObj(thread_hndl()); 1346 Threads::add(new_thread); 1347 Thread::start(new_thread); 1348 } // unlock Threads_lock 1349 1350 return JVMTI_ERROR_NONE; 1351 } /* end RunAgentThread */ 1352 1353 // 1354 // Thread Group functions 1355 // 1356 1357 // group_count_ptr - pre-checked for NULL 1358 // groups_ptr - pre-checked for NULL 1359 jvmtiError 1360 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) { 1361 JavaThread* current_thread = JavaThread::current(); 1362 1363 // Only one top level thread group now. 1364 *group_count_ptr = 1; 1365 1366 // Allocate memory to store global-refs to the thread groups. 1367 // Assume this area is freed by caller. 1368 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr)); 1369 1370 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY); 1371 1372 // Convert oop to Handle, then convert Handle to global-ref. 1373 { 1374 HandleMark hm(current_thread); 1375 Handle system_thread_group(current_thread, Universe::system_thread_group()); 1376 *groups_ptr[0] = jni_reference(system_thread_group); 1377 } 1378 1379 return JVMTI_ERROR_NONE; 1380 } /* end GetTopThreadGroups */ 1381 1382 1383 // info_ptr - pre-checked for NULL 1384 jvmtiError 1385 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) { 1386 ResourceMark rm; 1387 HandleMark hm; 1388 1389 JavaThread* current_thread = JavaThread::current(); 1390 1391 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group)); 1392 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP); 1393 1394 const char* name; 1395 Handle parent_group; 1396 bool is_daemon; 1397 ThreadPriority max_priority; 1398 1399 { MutexLocker mu(Threads_lock); 1400 1401 name = java_lang_ThreadGroup::name(group_obj()); 1402 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj())); 1403 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj()); 1404 max_priority = java_lang_ThreadGroup::maxPriority(group_obj()); 1405 } 1406 1407 info_ptr->is_daemon = is_daemon; 1408 info_ptr->max_priority = max_priority; 1409 info_ptr->parent = jni_reference(parent_group); 1410 1411 if (name != NULL) { 1412 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1); 1413 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY); 1414 strcpy(info_ptr->name, name); 1415 } else { 1416 info_ptr->name = NULL; 1417 } 1418 1419 return JVMTI_ERROR_NONE; 1420 } /* end GetThreadGroupInfo */ 1421 1422 1423 // thread_count_ptr - pre-checked for NULL 1424 // threads_ptr - pre-checked for NULL 1425 // group_count_ptr - pre-checked for NULL 1426 // groups_ptr - pre-checked for NULL 1427 jvmtiError 1428 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) { 1429 JavaThread* current_thread = JavaThread::current(); 1430 oop group_obj = (oop) JNIHandles::resolve_external_guard(group); 1431 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP); 1432 1433 Handle *thread_objs = NULL; 1434 Handle *group_objs = NULL; 1435 int nthreads = 0; 1436 int ngroups = 0; 1437 int hidden_threads = 0; 1438 1439 ResourceMark rm(current_thread); 1440 HandleMark hm(current_thread); 1441 1442 Handle group_hdl(current_thread, group_obj); 1443 1444 { // Cannot allow thread or group counts to change. 1445 MutexLocker mu(Threads_lock); 1446 1447 nthreads = java_lang_ThreadGroup::nthreads(group_hdl()); 1448 ngroups = java_lang_ThreadGroup::ngroups(group_hdl()); 1449 1450 if (nthreads > 0) { 1451 ThreadsListHandle tlh(current_thread); 1452 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl()); 1453 assert(nthreads <= threads->length(), "too many threads"); 1454 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads); 1455 for (int i=0, j=0; i<nthreads; i++) { 1456 oop thread_obj = threads->obj_at(i); 1457 assert(thread_obj != NULL, "thread_obj is NULL"); 1458 JavaThread *java_thread = NULL; 1459 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread); 1460 if (err == JVMTI_ERROR_NONE) { 1461 // Have a valid JavaThread*. 1462 if (java_thread->is_hidden_from_external_view()) { 1463 // Filter out hidden java threads. 1464 hidden_threads++; 1465 continue; 1466 } 1467 } else { 1468 // We couldn't convert thread_obj into a JavaThread*. 1469 if (err == JVMTI_ERROR_INVALID_THREAD) { 1470 // The thread_obj does not refer to a java.lang.Thread object 1471 // so skip it. 1472 hidden_threads++; 1473 continue; 1474 } 1475 // We have a valid thread_obj, but no JavaThread*; the caller 1476 // can still have limited use for the thread_obj. 1477 } 1478 thread_objs[j++] = Handle(current_thread, thread_obj); 1479 } 1480 nthreads -= hidden_threads; 1481 } // ThreadsListHandle is destroyed here. 1482 1483 if (ngroups > 0) { 1484 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl()); 1485 assert(ngroups <= groups->length(), "too many groups"); 1486 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups); 1487 for (int i=0; i<ngroups; i++) { 1488 oop group_obj = groups->obj_at(i); 1489 assert(group_obj != NULL, "group_obj != NULL"); 1490 group_objs[i] = Handle(current_thread, group_obj); 1491 } 1492 } 1493 } 1494 1495 // have to make global handles outside of Threads_lock 1496 *group_count_ptr = ngroups; 1497 *thread_count_ptr = nthreads; 1498 *threads_ptr = new_jthreadArray(nthreads, thread_objs); 1499 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs); 1500 if ((nthreads > 0) && (*threads_ptr == NULL)) { 1501 return JVMTI_ERROR_OUT_OF_MEMORY; 1502 } 1503 if ((ngroups > 0) && (*groups_ptr == NULL)) { 1504 return JVMTI_ERROR_OUT_OF_MEMORY; 1505 } 1506 1507 return JVMTI_ERROR_NONE; 1508 } /* end GetThreadGroupChildren */ 1509 1510 1511 // 1512 // Stack Frame functions 1513 // 1514 1515 // Threads_lock NOT held, java_thread not protected by lock 1516 // java_thread - pre-checked 1517 // max_frame_count - pre-checked to be greater than or equal to 0 1518 // frame_buffer - pre-checked for NULL 1519 // count_ptr - pre-checked for NULL 1520 jvmtiError 1521 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) { 1522 jvmtiError err = JVMTI_ERROR_NONE; 1523 1524 // It is only safe to perform the direct operation on the current 1525 // thread. All other usage needs to use a vm-safepoint-op for safety. 1526 if (java_thread == JavaThread::current()) { 1527 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1528 } else { 1529 // JVMTI get stack trace at safepoint. Do not require target thread to 1530 // be suspended. 1531 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1532 VMThread::execute(&op); 1533 err = op.result(); 1534 } 1535 1536 return err; 1537 } /* end GetStackTrace */ 1538 1539 1540 // max_frame_count - pre-checked to be greater than or equal to 0 1541 // stack_info_ptr - pre-checked for NULL 1542 // thread_count_ptr - pre-checked for NULL 1543 jvmtiError 1544 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) { 1545 jvmtiError err = JVMTI_ERROR_NONE; 1546 JavaThread* calling_thread = JavaThread::current(); 1547 1548 // JVMTI get stack traces at safepoint. 1549 VM_GetAllStackTraces op(this, calling_thread, max_frame_count); 1550 VMThread::execute(&op); 1551 *thread_count_ptr = op.final_thread_count(); 1552 *stack_info_ptr = op.stack_info(); 1553 err = op.result(); 1554 return err; 1555 } /* end GetAllStackTraces */ 1556 1557 1558 // thread_count - pre-checked to be greater than or equal to 0 1559 // thread_list - pre-checked for NULL 1560 // max_frame_count - pre-checked to be greater than or equal to 0 1561 // stack_info_ptr - pre-checked for NULL 1562 jvmtiError 1563 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) { 1564 jvmtiError err = JVMTI_ERROR_NONE; 1565 // JVMTI get stack traces at safepoint. 1566 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count); 1567 VMThread::execute(&op); 1568 err = op.result(); 1569 if (err == JVMTI_ERROR_NONE) { 1570 *stack_info_ptr = op.stack_info(); 1571 } 1572 return err; 1573 } /* end GetThreadListStackTraces */ 1574 1575 1576 // Threads_lock NOT held, java_thread not protected by lock 1577 // java_thread - pre-checked 1578 // count_ptr - pre-checked for NULL 1579 jvmtiError 1580 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) { 1581 jvmtiError err = JVMTI_ERROR_NONE; 1582 1583 // retrieve or create JvmtiThreadState. 1584 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1585 if (state == NULL) { 1586 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1587 } 1588 1589 // It is only safe to perform the direct operation on the current 1590 // thread. All other usage needs to use a vm-safepoint-op for safety. 1591 if (java_thread == JavaThread::current()) { 1592 err = get_frame_count(state, count_ptr); 1593 } else { 1594 // get java stack frame count at safepoint. 1595 VM_GetFrameCount op(this, state, count_ptr); 1596 VMThread::execute(&op); 1597 err = op.result(); 1598 } 1599 return err; 1600 } /* end GetFrameCount */ 1601 1602 1603 // Threads_lock NOT held, java_thread not protected by lock 1604 // java_thread - pre-checked 1605 jvmtiError 1606 JvmtiEnv::PopFrame(JavaThread* java_thread) { 1607 JavaThread* current_thread = JavaThread::current(); 1608 HandleMark hm(current_thread); 1609 uint32_t debug_bits = 0; 1610 1611 // retrieve or create the state 1612 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1613 if (state == NULL) { 1614 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1615 } 1616 1617 // Check if java_thread is fully suspended 1618 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) { 1619 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1620 } 1621 // Check to see if a PopFrame was already in progress 1622 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) { 1623 // Probably possible for JVMTI clients to trigger this, but the 1624 // JPDA backend shouldn't allow this to happen 1625 return JVMTI_ERROR_INTERNAL; 1626 } 1627 1628 { 1629 // Was workaround bug 1630 // 4812902: popFrame hangs if the method is waiting at a synchronize 1631 // Catch this condition and return an error to avoid hanging. 1632 // Now JVMTI spec allows an implementation to bail out with an opaque frame error. 1633 OSThread* osThread = java_thread->osthread(); 1634 if (osThread->get_state() == MONITOR_WAIT) { 1635 return JVMTI_ERROR_OPAQUE_FRAME; 1636 } 1637 } 1638 1639 { 1640 ResourceMark rm(current_thread); 1641 // Check if there are more than one Java frame in this thread, that the top two frames 1642 // are Java (not native) frames, and that there is no intervening VM frame 1643 int frame_count = 0; 1644 bool is_interpreted[2]; 1645 intptr_t *frame_sp[2]; 1646 // The 2-nd arg of constructor is needed to stop iterating at java entry frame. 1647 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) { 1648 methodHandle mh(current_thread, vfs.method()); 1649 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME); 1650 is_interpreted[frame_count] = vfs.is_interpreted_frame(); 1651 frame_sp[frame_count] = vfs.frame_id(); 1652 if (++frame_count > 1) break; 1653 } 1654 if (frame_count < 2) { 1655 // We haven't found two adjacent non-native Java frames on the top. 1656 // There can be two situations here: 1657 // 1. There are no more java frames 1658 // 2. Two top java frames are separated by non-java native frames 1659 if(vframeFor(java_thread, 1) == NULL) { 1660 return JVMTI_ERROR_NO_MORE_FRAMES; 1661 } else { 1662 // Intervening non-java native or VM frames separate java frames. 1663 // Current implementation does not support this. See bug #5031735. 1664 // In theory it is possible to pop frames in such cases. 1665 return JVMTI_ERROR_OPAQUE_FRAME; 1666 } 1667 } 1668 1669 // If any of the top 2 frames is a compiled one, need to deoptimize it 1670 for (int i = 0; i < 2; i++) { 1671 if (!is_interpreted[i]) { 1672 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]); 1673 } 1674 } 1675 1676 // Update the thread state to reflect that the top frame is popped 1677 // so that cur_stack_depth is maintained properly and all frameIDs 1678 // are invalidated. 1679 // The current frame will be popped later when the suspended thread 1680 // is resumed and right before returning from VM to Java. 1681 // (see call_VM_base() in assembler_<cpu>.cpp). 1682 1683 // It's fine to update the thread state here because no JVMTI events 1684 // shall be posted for this PopFrame. 1685 1686 // It is only safe to perform the direct operation on the current 1687 // thread. All other usage needs to use a vm-safepoint-op for safety. 1688 if (java_thread == JavaThread::current()) { 1689 state->update_for_pop_top_frame(); 1690 } else { 1691 VM_UpdateForPopTopFrame op(state); 1692 VMThread::execute(&op); 1693 jvmtiError err = op.result(); 1694 if (err != JVMTI_ERROR_NONE) { 1695 return err; 1696 } 1697 } 1698 1699 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit); 1700 // Set pending step flag for this popframe and it is cleared when next 1701 // step event is posted. 1702 state->set_pending_step_for_popframe(); 1703 } 1704 1705 return JVMTI_ERROR_NONE; 1706 } /* end PopFrame */ 1707 1708 1709 // Threads_lock NOT held, java_thread not protected by lock 1710 // java_thread - pre-checked 1711 // java_thread - unchecked 1712 // depth - pre-checked as non-negative 1713 // method_ptr - pre-checked for NULL 1714 // location_ptr - pre-checked for NULL 1715 jvmtiError 1716 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) { 1717 jvmtiError err = JVMTI_ERROR_NONE; 1718 1719 // It is only safe to perform the direct operation on the current 1720 // thread. All other usage needs to use a vm-safepoint-op for safety. 1721 if (java_thread == JavaThread::current()) { 1722 err = get_frame_location(java_thread, depth, method_ptr, location_ptr); 1723 } else { 1724 // JVMTI get java stack frame location at safepoint. 1725 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr); 1726 VMThread::execute(&op); 1727 err = op.result(); 1728 } 1729 return err; 1730 } /* end GetFrameLocation */ 1731 1732 1733 // Threads_lock NOT held, java_thread not protected by lock 1734 // java_thread - pre-checked 1735 // java_thread - unchecked 1736 // depth - pre-checked as non-negative 1737 jvmtiError 1738 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) { 1739 jvmtiError err = JVMTI_ERROR_NONE; 1740 ResourceMark rm; 1741 uint32_t debug_bits = 0; 1742 1743 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread); 1744 if (state == NULL) { 1745 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1746 } 1747 1748 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) { 1749 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1750 } 1751 1752 if (TraceJVMTICalls) { 1753 JvmtiSuspendControl::print(); 1754 } 1755 1756 vframe *vf = vframeFor(java_thread, depth); 1757 if (vf == NULL) { 1758 return JVMTI_ERROR_NO_MORE_FRAMES; 1759 } 1760 1761 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) { 1762 return JVMTI_ERROR_OPAQUE_FRAME; 1763 } 1764 1765 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL"); 1766 1767 // It is only safe to perform the direct operation on the current 1768 // thread. All other usage needs to use a vm-safepoint-op for safety. 1769 if (java_thread == JavaThread::current()) { 1770 int frame_number = state->count_frames() - depth; 1771 state->env_thread_state(this)->set_frame_pop(frame_number); 1772 } else { 1773 VM_SetFramePop op(this, state, depth); 1774 VMThread::execute(&op); 1775 err = op.result(); 1776 } 1777 return err; 1778 } /* end NotifyFramePop */ 1779 1780 1781 // 1782 // Force Early Return functions 1783 // 1784 1785 // Threads_lock NOT held, java_thread not protected by lock 1786 // java_thread - pre-checked 1787 jvmtiError 1788 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) { 1789 jvalue val; 1790 val.l = value; 1791 return force_early_return(java_thread, val, atos); 1792 } /* end ForceEarlyReturnObject */ 1793 1794 1795 // Threads_lock NOT held, java_thread not protected by lock 1796 // java_thread - pre-checked 1797 jvmtiError 1798 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) { 1799 jvalue val; 1800 val.i = value; 1801 return force_early_return(java_thread, val, itos); 1802 } /* end ForceEarlyReturnInt */ 1803 1804 1805 // Threads_lock NOT held, java_thread not protected by lock 1806 // java_thread - pre-checked 1807 jvmtiError 1808 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) { 1809 jvalue val; 1810 val.j = value; 1811 return force_early_return(java_thread, val, ltos); 1812 } /* end ForceEarlyReturnLong */ 1813 1814 1815 // Threads_lock NOT held, java_thread not protected by lock 1816 // java_thread - pre-checked 1817 jvmtiError 1818 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) { 1819 jvalue val; 1820 val.f = value; 1821 return force_early_return(java_thread, val, ftos); 1822 } /* end ForceEarlyReturnFloat */ 1823 1824 1825 // Threads_lock NOT held, java_thread not protected by lock 1826 // java_thread - pre-checked 1827 jvmtiError 1828 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) { 1829 jvalue val; 1830 val.d = value; 1831 return force_early_return(java_thread, val, dtos); 1832 } /* end ForceEarlyReturnDouble */ 1833 1834 1835 // Threads_lock NOT held, java_thread not protected by lock 1836 // java_thread - pre-checked 1837 jvmtiError 1838 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) { 1839 jvalue val; 1840 val.j = 0L; 1841 return force_early_return(java_thread, val, vtos); 1842 } /* end ForceEarlyReturnVoid */ 1843 1844 1845 // 1846 // Heap functions 1847 // 1848 1849 // klass - NULL is a valid value, must be checked 1850 // initial_object - NULL is a valid value, must be checked 1851 // callbacks - pre-checked for NULL 1852 // user_data - NULL is a valid value, must be checked 1853 jvmtiError 1854 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1855 // check klass if provided 1856 Klass* k = NULL; 1857 if (klass != NULL) { 1858 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1859 if (k_mirror == NULL) { 1860 return JVMTI_ERROR_INVALID_CLASS; 1861 } 1862 if (java_lang_Class::is_primitive(k_mirror)) { 1863 return JVMTI_ERROR_NONE; 1864 } 1865 k = java_lang_Class::as_Klass(k_mirror); 1866 if (klass == NULL) { 1867 return JVMTI_ERROR_INVALID_CLASS; 1868 } 1869 } 1870 1871 if (initial_object != NULL) { 1872 oop init_obj = JNIHandles::resolve_external_guard(initial_object); 1873 if (init_obj == NULL) { 1874 return JVMTI_ERROR_INVALID_OBJECT; 1875 } 1876 } 1877 1878 Thread *thread = Thread::current(); 1879 HandleMark hm(thread); 1880 1881 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1882 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data); 1883 return JVMTI_ERROR_NONE; 1884 } /* end FollowReferences */ 1885 1886 1887 // klass - NULL is a valid value, must be checked 1888 // callbacks - pre-checked for NULL 1889 // user_data - NULL is a valid value, must be checked 1890 jvmtiError 1891 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1892 // check klass if provided 1893 Klass* k = NULL; 1894 if (klass != NULL) { 1895 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1896 if (k_mirror == NULL) { 1897 return JVMTI_ERROR_INVALID_CLASS; 1898 } 1899 if (java_lang_Class::is_primitive(k_mirror)) { 1900 return JVMTI_ERROR_NONE; 1901 } 1902 k = java_lang_Class::as_Klass(k_mirror); 1903 if (k == NULL) { 1904 return JVMTI_ERROR_INVALID_CLASS; 1905 } 1906 } 1907 1908 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1909 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data); 1910 return JVMTI_ERROR_NONE; 1911 } /* end IterateThroughHeap */ 1912 1913 1914 // tag_ptr - pre-checked for NULL 1915 jvmtiError 1916 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) { 1917 oop o = JNIHandles::resolve_external_guard(object); 1918 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1919 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object); 1920 return JVMTI_ERROR_NONE; 1921 } /* end GetTag */ 1922 1923 1924 jvmtiError 1925 JvmtiEnv::SetTag(jobject object, jlong tag) { 1926 oop o = JNIHandles::resolve_external_guard(object); 1927 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1928 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag); 1929 return JVMTI_ERROR_NONE; 1930 } /* end SetTag */ 1931 1932 1933 // tag_count - pre-checked to be greater than or equal to 0 1934 // tags - pre-checked for NULL 1935 // count_ptr - pre-checked for NULL 1936 // object_result_ptr - NULL is a valid value, must be checked 1937 // tag_result_ptr - NULL is a valid value, must be checked 1938 jvmtiError 1939 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { 1940 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1941 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr); 1942 } /* end GetObjectsWithTags */ 1943 1944 1945 jvmtiError 1946 JvmtiEnv::ForceGarbageCollection() { 1947 Universe::heap()->collect(GCCause::_jvmti_force_gc); 1948 return JVMTI_ERROR_NONE; 1949 } /* end ForceGarbageCollection */ 1950 1951 1952 // 1953 // Heap (1.0) functions 1954 // 1955 1956 // object_reference_callback - pre-checked for NULL 1957 // user_data - NULL is a valid value, must be checked 1958 jvmtiError 1959 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) { 1960 oop o = JNIHandles::resolve_external_guard(object); 1961 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1962 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data); 1963 return JVMTI_ERROR_NONE; 1964 } /* end IterateOverObjectsReachableFromObject */ 1965 1966 1967 // heap_root_callback - NULL is a valid value, must be checked 1968 // stack_ref_callback - NULL is a valid value, must be checked 1969 // object_ref_callback - NULL is a valid value, must be checked 1970 // user_data - NULL is a valid value, must be checked 1971 jvmtiError 1972 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) { 1973 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1974 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data); 1975 return JVMTI_ERROR_NONE; 1976 } /* end IterateOverReachableObjects */ 1977 1978 1979 // heap_object_callback - pre-checked for NULL 1980 // user_data - NULL is a valid value, must be checked 1981 jvmtiError 1982 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1983 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging)); 1984 Thread *thread = Thread::current(); 1985 HandleMark hm(thread); 1986 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data); 1987 return JVMTI_ERROR_NONE; 1988 } /* end IterateOverHeap */ 1989 1990 1991 // k_mirror - may be primitive, this must be checked 1992 // heap_object_callback - pre-checked for NULL 1993 // user_data - NULL is a valid value, must be checked 1994 jvmtiError 1995 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1996 if (java_lang_Class::is_primitive(k_mirror)) { 1997 // DO PRIMITIVE CLASS PROCESSING 1998 return JVMTI_ERROR_NONE; 1999 } 2000 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2001 if (klass == NULL) { 2002 return JVMTI_ERROR_INVALID_CLASS; 2003 } 2004 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging)); 2005 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data); 2006 return JVMTI_ERROR_NONE; 2007 } /* end IterateOverInstancesOfClass */ 2008 2009 2010 // 2011 // Local Variable functions 2012 // 2013 2014 // Threads_lock NOT held, java_thread not protected by lock 2015 // java_thread - pre-checked 2016 // java_thread - unchecked 2017 // depth - pre-checked as non-negative 2018 // value_ptr - pre-checked for NULL 2019 jvmtiError 2020 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) { 2021 JavaThread* current_thread = JavaThread::current(); 2022 // rm object is created to clean up the javaVFrame created in 2023 // doit_prologue(), but after doit() is finished with it. 2024 ResourceMark rm(current_thread); 2025 2026 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot); 2027 VMThread::execute(&op); 2028 jvmtiError err = op.result(); 2029 if (err != JVMTI_ERROR_NONE) { 2030 return err; 2031 } else { 2032 *value_ptr = op.value().l; 2033 return JVMTI_ERROR_NONE; 2034 } 2035 } /* end GetLocalObject */ 2036 2037 // Threads_lock NOT held, java_thread not protected by lock 2038 // java_thread - pre-checked 2039 // java_thread - unchecked 2040 // depth - pre-checked as non-negative 2041 // value - pre-checked for NULL 2042 jvmtiError 2043 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){ 2044 JavaThread* current_thread = JavaThread::current(); 2045 // rm object is created to clean up the javaVFrame created in 2046 // doit_prologue(), but after doit() is finished with it. 2047 ResourceMark rm(current_thread); 2048 2049 VM_GetReceiver op(java_thread, current_thread, depth); 2050 VMThread::execute(&op); 2051 jvmtiError err = op.result(); 2052 if (err != JVMTI_ERROR_NONE) { 2053 return err; 2054 } else { 2055 *value_ptr = op.value().l; 2056 return JVMTI_ERROR_NONE; 2057 } 2058 } /* end GetLocalInstance */ 2059 2060 2061 // Threads_lock NOT held, java_thread not protected by lock 2062 // java_thread - pre-checked 2063 // java_thread - unchecked 2064 // depth - pre-checked as non-negative 2065 // value_ptr - pre-checked for NULL 2066 jvmtiError 2067 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) { 2068 // rm object is created to clean up the javaVFrame created in 2069 // doit_prologue(), but after doit() is finished with it. 2070 ResourceMark rm; 2071 2072 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT); 2073 VMThread::execute(&op); 2074 *value_ptr = op.value().i; 2075 return op.result(); 2076 } /* end GetLocalInt */ 2077 2078 2079 // Threads_lock NOT held, java_thread not protected by lock 2080 // java_thread - pre-checked 2081 // java_thread - unchecked 2082 // depth - pre-checked as non-negative 2083 // value_ptr - pre-checked for NULL 2084 jvmtiError 2085 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) { 2086 // rm object is created to clean up the javaVFrame created in 2087 // doit_prologue(), but after doit() is finished with it. 2088 ResourceMark rm; 2089 2090 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG); 2091 VMThread::execute(&op); 2092 *value_ptr = op.value().j; 2093 return op.result(); 2094 } /* end GetLocalLong */ 2095 2096 2097 // Threads_lock NOT held, java_thread not protected by lock 2098 // java_thread - pre-checked 2099 // java_thread - unchecked 2100 // depth - pre-checked as non-negative 2101 // value_ptr - pre-checked for NULL 2102 jvmtiError 2103 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) { 2104 // rm object is created to clean up the javaVFrame created in 2105 // doit_prologue(), but after doit() is finished with it. 2106 ResourceMark rm; 2107 2108 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT); 2109 VMThread::execute(&op); 2110 *value_ptr = op.value().f; 2111 return op.result(); 2112 } /* end GetLocalFloat */ 2113 2114 2115 // Threads_lock NOT held, java_thread not protected by lock 2116 // java_thread - pre-checked 2117 // java_thread - unchecked 2118 // depth - pre-checked as non-negative 2119 // value_ptr - pre-checked for NULL 2120 jvmtiError 2121 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) { 2122 // rm object is created to clean up the javaVFrame created in 2123 // doit_prologue(), but after doit() is finished with it. 2124 ResourceMark rm; 2125 2126 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE); 2127 VMThread::execute(&op); 2128 *value_ptr = op.value().d; 2129 return op.result(); 2130 } /* end GetLocalDouble */ 2131 2132 2133 // Threads_lock NOT held, java_thread not protected by lock 2134 // java_thread - pre-checked 2135 // java_thread - unchecked 2136 // depth - pre-checked as non-negative 2137 jvmtiError 2138 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) { 2139 // rm object is created to clean up the javaVFrame created in 2140 // doit_prologue(), but after doit() is finished with it. 2141 ResourceMark rm; 2142 jvalue val; 2143 val.l = value; 2144 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val); 2145 VMThread::execute(&op); 2146 return op.result(); 2147 } /* end SetLocalObject */ 2148 2149 2150 // Threads_lock NOT held, java_thread not protected by lock 2151 // java_thread - pre-checked 2152 // java_thread - unchecked 2153 // depth - pre-checked as non-negative 2154 jvmtiError 2155 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) { 2156 // rm object is created to clean up the javaVFrame created in 2157 // doit_prologue(), but after doit() is finished with it. 2158 ResourceMark rm; 2159 jvalue val; 2160 val.i = value; 2161 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val); 2162 VMThread::execute(&op); 2163 return op.result(); 2164 } /* end SetLocalInt */ 2165 2166 2167 // Threads_lock NOT held, java_thread not protected by lock 2168 // java_thread - pre-checked 2169 // java_thread - unchecked 2170 // depth - pre-checked as non-negative 2171 jvmtiError 2172 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) { 2173 // rm object is created to clean up the javaVFrame created in 2174 // doit_prologue(), but after doit() is finished with it. 2175 ResourceMark rm; 2176 jvalue val; 2177 val.j = value; 2178 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val); 2179 VMThread::execute(&op); 2180 return op.result(); 2181 } /* end SetLocalLong */ 2182 2183 2184 // Threads_lock NOT held, java_thread not protected by lock 2185 // java_thread - pre-checked 2186 // java_thread - unchecked 2187 // depth - pre-checked as non-negative 2188 jvmtiError 2189 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) { 2190 // rm object is created to clean up the javaVFrame created in 2191 // doit_prologue(), but after doit() is finished with it. 2192 ResourceMark rm; 2193 jvalue val; 2194 val.f = value; 2195 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val); 2196 VMThread::execute(&op); 2197 return op.result(); 2198 } /* end SetLocalFloat */ 2199 2200 2201 // Threads_lock NOT held, java_thread not protected by lock 2202 // java_thread - pre-checked 2203 // java_thread - unchecked 2204 // depth - pre-checked as non-negative 2205 jvmtiError 2206 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) { 2207 // rm object is created to clean up the javaVFrame created in 2208 // doit_prologue(), but after doit() is finished with it. 2209 ResourceMark rm; 2210 jvalue val; 2211 val.d = value; 2212 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val); 2213 VMThread::execute(&op); 2214 return op.result(); 2215 } /* end SetLocalDouble */ 2216 2217 2218 // 2219 // Breakpoint functions 2220 // 2221 2222 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2223 jvmtiError 2224 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) { 2225 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2226 if (location < 0) { // simple invalid location check first 2227 return JVMTI_ERROR_INVALID_LOCATION; 2228 } 2229 // verify that the breakpoint is not past the end of the method 2230 if (location >= (jlocation) method_oop->code_size()) { 2231 return JVMTI_ERROR_INVALID_LOCATION; 2232 } 2233 2234 ResourceMark rm; 2235 JvmtiBreakpoint bp(method_oop, location); 2236 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2237 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE) 2238 return JVMTI_ERROR_DUPLICATE; 2239 2240 if (TraceJVMTICalls) { 2241 jvmti_breakpoints.print(); 2242 } 2243 2244 return JVMTI_ERROR_NONE; 2245 } /* end SetBreakpoint */ 2246 2247 2248 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2249 jvmtiError 2250 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) { 2251 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2252 2253 if (location < 0) { // simple invalid location check first 2254 return JVMTI_ERROR_INVALID_LOCATION; 2255 } 2256 2257 // verify that the breakpoint is not past the end of the method 2258 if (location >= (jlocation) method_oop->code_size()) { 2259 return JVMTI_ERROR_INVALID_LOCATION; 2260 } 2261 2262 JvmtiBreakpoint bp(method_oop, location); 2263 2264 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2265 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND) 2266 return JVMTI_ERROR_NOT_FOUND; 2267 2268 if (TraceJVMTICalls) { 2269 jvmti_breakpoints.print(); 2270 } 2271 2272 return JVMTI_ERROR_NONE; 2273 } /* end ClearBreakpoint */ 2274 2275 2276 // 2277 // Watched Field functions 2278 // 2279 2280 jvmtiError 2281 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2282 // make sure we haven't set this watch before 2283 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE; 2284 fdesc_ptr->set_is_field_access_watched(true); 2285 2286 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true); 2287 2288 return JVMTI_ERROR_NONE; 2289 } /* end SetFieldAccessWatch */ 2290 2291 2292 jvmtiError 2293 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2294 // make sure we have a watch to clear 2295 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND; 2296 fdesc_ptr->set_is_field_access_watched(false); 2297 2298 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false); 2299 2300 return JVMTI_ERROR_NONE; 2301 } /* end ClearFieldAccessWatch */ 2302 2303 2304 jvmtiError 2305 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2306 // make sure we haven't set this watch before 2307 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE; 2308 fdesc_ptr->set_is_field_modification_watched(true); 2309 2310 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true); 2311 2312 return JVMTI_ERROR_NONE; 2313 } /* end SetFieldModificationWatch */ 2314 2315 2316 jvmtiError 2317 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2318 // make sure we have a watch to clear 2319 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND; 2320 fdesc_ptr->set_is_field_modification_watched(false); 2321 2322 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false); 2323 2324 return JVMTI_ERROR_NONE; 2325 } /* end ClearFieldModificationWatch */ 2326 2327 // 2328 // Class functions 2329 // 2330 2331 2332 // k_mirror - may be primitive, this must be checked 2333 // signature_ptr - NULL is a valid value, must be checked 2334 // generic_ptr - NULL is a valid value, must be checked 2335 jvmtiError 2336 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) { 2337 ResourceMark rm; 2338 bool isPrimitive = java_lang_Class::is_primitive(k_mirror); 2339 Klass* k = NULL; 2340 if (!isPrimitive) { 2341 k = java_lang_Class::as_Klass(k_mirror); 2342 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2343 } 2344 if (signature_ptr != NULL) { 2345 char* result = NULL; 2346 if (isPrimitive) { 2347 char tchar = type2char(java_lang_Class::primitive_type(k_mirror)); 2348 result = (char*) jvmtiMalloc(2); 2349 result[0] = tchar; 2350 result[1] = '\0'; 2351 } else { 2352 const char* class_sig = k->signature_name(); 2353 result = (char *) jvmtiMalloc(strlen(class_sig)+1); 2354 strcpy(result, class_sig); 2355 } 2356 *signature_ptr = result; 2357 } 2358 if (generic_ptr != NULL) { 2359 *generic_ptr = NULL; 2360 if (!isPrimitive && k->is_instance_klass()) { 2361 Symbol* soo = InstanceKlass::cast(k)->generic_signature(); 2362 if (soo != NULL) { 2363 const char *gen_sig = soo->as_C_string(); 2364 if (gen_sig != NULL) { 2365 char* gen_result; 2366 jvmtiError err = allocate(strlen(gen_sig) + 1, 2367 (unsigned char **)&gen_result); 2368 if (err != JVMTI_ERROR_NONE) { 2369 return err; 2370 } 2371 strcpy(gen_result, gen_sig); 2372 *generic_ptr = gen_result; 2373 } 2374 } 2375 } 2376 } 2377 return JVMTI_ERROR_NONE; 2378 } /* end GetClassSignature */ 2379 2380 2381 // k_mirror - may be primitive, this must be checked 2382 // status_ptr - pre-checked for NULL 2383 jvmtiError 2384 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) { 2385 jint result = 0; 2386 if (java_lang_Class::is_primitive(k_mirror)) { 2387 result |= JVMTI_CLASS_STATUS_PRIMITIVE; 2388 } else { 2389 Klass* k = java_lang_Class::as_Klass(k_mirror); 2390 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2391 result = k->jvmti_class_status(); 2392 } 2393 *status_ptr = result; 2394 2395 return JVMTI_ERROR_NONE; 2396 } /* end GetClassStatus */ 2397 2398 2399 // k_mirror - may be primitive, this must be checked 2400 // source_name_ptr - pre-checked for NULL 2401 jvmtiError 2402 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) { 2403 if (java_lang_Class::is_primitive(k_mirror)) { 2404 return JVMTI_ERROR_ABSENT_INFORMATION; 2405 } 2406 Klass* k_klass = java_lang_Class::as_Klass(k_mirror); 2407 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS); 2408 2409 if (!k_klass->is_instance_klass()) { 2410 return JVMTI_ERROR_ABSENT_INFORMATION; 2411 } 2412 2413 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name(); 2414 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION); 2415 { 2416 JavaThread* current_thread = JavaThread::current(); 2417 ResourceMark rm(current_thread); 2418 const char* sfncp = (const char*) sfnOop->as_C_string(); 2419 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1); 2420 strcpy(*source_name_ptr, sfncp); 2421 } 2422 2423 return JVMTI_ERROR_NONE; 2424 } /* end GetSourceFileName */ 2425 2426 2427 // k_mirror - may be primitive, this must be checked 2428 // modifiers_ptr - pre-checked for NULL 2429 jvmtiError 2430 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) { 2431 JavaThread* current_thread = JavaThread::current(); 2432 jint result = 0; 2433 if (!java_lang_Class::is_primitive(k_mirror)) { 2434 Klass* k = java_lang_Class::as_Klass(k_mirror); 2435 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2436 result = k->compute_modifier_flags(current_thread); 2437 JavaThread* THREAD = current_thread; // pass to macros 2438 if (HAS_PENDING_EXCEPTION) { 2439 CLEAR_PENDING_EXCEPTION; 2440 return JVMTI_ERROR_INTERNAL; 2441 }; 2442 2443 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()). 2444 if(k->is_super()) { 2445 result |= JVM_ACC_SUPER; 2446 } 2447 } else { 2448 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 2449 } 2450 *modifiers_ptr = result; 2451 2452 return JVMTI_ERROR_NONE; 2453 } /* end GetClassModifiers */ 2454 2455 2456 // k_mirror - may be primitive, this must be checked 2457 // method_count_ptr - pre-checked for NULL 2458 // methods_ptr - pre-checked for NULL 2459 jvmtiError 2460 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) { 2461 JavaThread* current_thread = JavaThread::current(); 2462 HandleMark hm(current_thread); 2463 2464 if (java_lang_Class::is_primitive(k_mirror)) { 2465 *method_count_ptr = 0; 2466 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2467 return JVMTI_ERROR_NONE; 2468 } 2469 Klass* k = java_lang_Class::as_Klass(k_mirror); 2470 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2471 2472 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2473 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2474 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2475 } 2476 2477 if (!k->is_instance_klass()) { 2478 *method_count_ptr = 0; 2479 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2480 return JVMTI_ERROR_NONE; 2481 } 2482 InstanceKlass* ik = InstanceKlass::cast(k); 2483 // Allocate the result and fill it in 2484 int result_length = ik->methods()->length(); 2485 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID)); 2486 int index; 2487 bool jmethodids_found = true; 2488 2489 if (JvmtiExport::can_maintain_original_method_order()) { 2490 // Use the original method ordering indices stored in the class, so we can emit 2491 // jmethodIDs in the order they appeared in the class file 2492 for (index = 0; index < result_length; index++) { 2493 Method* m = ik->methods()->at(index); 2494 int original_index = ik->method_ordering()->at(index); 2495 assert(original_index >= 0 && original_index < result_length, "invalid original method index"); 2496 jmethodID id; 2497 if (jmethodids_found) { 2498 id = m->find_jmethod_id_or_null(); 2499 if (id == NULL) { 2500 // If we find an uninitialized value, make sure there is 2501 // enough space for all the uninitialized values we might 2502 // find. 2503 ik->ensure_space_for_methodids(index); 2504 jmethodids_found = false; 2505 id = m->jmethod_id(); 2506 } 2507 } else { 2508 id = m->jmethod_id(); 2509 } 2510 result_list[original_index] = id; 2511 } 2512 } else { 2513 // otherwise just copy in any order 2514 for (index = 0; index < result_length; index++) { 2515 Method* m = ik->methods()->at(index); 2516 jmethodID id; 2517 if (jmethodids_found) { 2518 id = m->find_jmethod_id_or_null(); 2519 if (id == NULL) { 2520 // If we find an uninitialized value, make sure there is 2521 // enough space for all the uninitialized values we might 2522 // find. 2523 ik->ensure_space_for_methodids(index); 2524 jmethodids_found = false; 2525 id = m->jmethod_id(); 2526 } 2527 } else { 2528 id = m->jmethod_id(); 2529 } 2530 result_list[index] = id; 2531 } 2532 } 2533 // Fill in return value. 2534 *method_count_ptr = result_length; 2535 *methods_ptr = result_list; 2536 2537 return JVMTI_ERROR_NONE; 2538 } /* end GetClassMethods */ 2539 2540 2541 // k_mirror - may be primitive, this must be checked 2542 // field_count_ptr - pre-checked for NULL 2543 // fields_ptr - pre-checked for NULL 2544 jvmtiError 2545 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) { 2546 if (java_lang_Class::is_primitive(k_mirror)) { 2547 *field_count_ptr = 0; 2548 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2549 return JVMTI_ERROR_NONE; 2550 } 2551 JavaThread* current_thread = JavaThread::current(); 2552 HandleMark hm(current_thread); 2553 Klass* k = java_lang_Class::as_Klass(k_mirror); 2554 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2555 2556 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2557 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2558 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2559 } 2560 2561 if (!k->is_instance_klass()) { 2562 *field_count_ptr = 0; 2563 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2564 return JVMTI_ERROR_NONE; 2565 } 2566 2567 2568 InstanceKlass* ik = InstanceKlass::cast(k); 2569 2570 int result_count = 0; 2571 // First, count the fields. 2572 FilteredFieldStream flds(ik, true, true); 2573 result_count = flds.field_count(); 2574 2575 // Allocate the result and fill it in 2576 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID)); 2577 // The JVMTI spec requires fields in the order they occur in the class file, 2578 // this is the reverse order of what FieldStream hands out. 2579 int id_index = (result_count - 1); 2580 2581 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) { 2582 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID( 2583 ik, src_st.offset(), 2584 src_st.access_flags().is_static()); 2585 } 2586 assert(id_index == -1, "just checking"); 2587 // Fill in the results 2588 *field_count_ptr = result_count; 2589 *fields_ptr = result_list; 2590 2591 return JVMTI_ERROR_NONE; 2592 } /* end GetClassFields */ 2593 2594 2595 // k_mirror - may be primitive, this must be checked 2596 // interface_count_ptr - pre-checked for NULL 2597 // interfaces_ptr - pre-checked for NULL 2598 jvmtiError 2599 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) { 2600 { 2601 if (java_lang_Class::is_primitive(k_mirror)) { 2602 *interface_count_ptr = 0; 2603 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2604 return JVMTI_ERROR_NONE; 2605 } 2606 JavaThread* current_thread = JavaThread::current(); 2607 HandleMark hm(current_thread); 2608 Klass* k = java_lang_Class::as_Klass(k_mirror); 2609 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2610 2611 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2612 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) 2613 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2614 2615 if (!k->is_instance_klass()) { 2616 *interface_count_ptr = 0; 2617 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2618 return JVMTI_ERROR_NONE; 2619 } 2620 2621 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces(); 2622 const int result_length = (interface_list == NULL ? 0 : interface_list->length()); 2623 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass)); 2624 for (int i_index = 0; i_index < result_length; i_index += 1) { 2625 Klass* klass_at = interface_list->at(i_index); 2626 assert(klass_at->is_klass(), "interfaces must be Klass*s"); 2627 assert(klass_at->is_interface(), "interfaces must be interfaces"); 2628 oop mirror_at = klass_at->java_mirror(); 2629 Handle handle_at = Handle(current_thread, mirror_at); 2630 result_list[i_index] = (jclass) jni_reference(handle_at); 2631 } 2632 *interface_count_ptr = result_length; 2633 *interfaces_ptr = result_list; 2634 } 2635 2636 return JVMTI_ERROR_NONE; 2637 } /* end GetImplementedInterfaces */ 2638 2639 2640 // k_mirror - may be primitive, this must be checked 2641 // minor_version_ptr - pre-checked for NULL 2642 // major_version_ptr - pre-checked for NULL 2643 jvmtiError 2644 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) { 2645 if (java_lang_Class::is_primitive(k_mirror)) { 2646 return JVMTI_ERROR_ABSENT_INFORMATION; 2647 } 2648 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2649 2650 jint status = klass->jvmti_class_status(); 2651 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2652 return JVMTI_ERROR_INVALID_CLASS; 2653 } 2654 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2655 return JVMTI_ERROR_ABSENT_INFORMATION; 2656 } 2657 2658 InstanceKlass* ik = InstanceKlass::cast(klass); 2659 *minor_version_ptr = ik->minor_version(); 2660 *major_version_ptr = ik->major_version(); 2661 2662 return JVMTI_ERROR_NONE; 2663 } /* end GetClassVersionNumbers */ 2664 2665 2666 // k_mirror - may be primitive, this must be checked 2667 // constant_pool_count_ptr - pre-checked for NULL 2668 // constant_pool_byte_count_ptr - pre-checked for NULL 2669 // constant_pool_bytes_ptr - pre-checked for NULL 2670 jvmtiError 2671 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) { 2672 if (java_lang_Class::is_primitive(k_mirror)) { 2673 return JVMTI_ERROR_ABSENT_INFORMATION; 2674 } 2675 2676 Klass* klass = java_lang_Class::as_Klass(k_mirror); 2677 Thread *thread = Thread::current(); 2678 ResourceMark rm(thread); 2679 2680 jint status = klass->jvmti_class_status(); 2681 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2682 return JVMTI_ERROR_INVALID_CLASS; 2683 } 2684 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2685 return JVMTI_ERROR_ABSENT_INFORMATION; 2686 } 2687 2688 InstanceKlass* ik = InstanceKlass::cast(klass); 2689 JvmtiConstantPoolReconstituter reconstituter(ik); 2690 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2691 return reconstituter.get_error(); 2692 } 2693 2694 unsigned char *cpool_bytes; 2695 int cpool_size = reconstituter.cpool_size(); 2696 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2697 return reconstituter.get_error(); 2698 } 2699 jvmtiError res = allocate(cpool_size, &cpool_bytes); 2700 if (res != JVMTI_ERROR_NONE) { 2701 return res; 2702 } 2703 reconstituter.copy_cpool_bytes(cpool_bytes); 2704 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2705 return reconstituter.get_error(); 2706 } 2707 2708 constantPoolHandle constants(thread, ik->constants()); 2709 *constant_pool_count_ptr = constants->length(); 2710 *constant_pool_byte_count_ptr = cpool_size; 2711 *constant_pool_bytes_ptr = cpool_bytes; 2712 2713 return JVMTI_ERROR_NONE; 2714 } /* end GetConstantPool */ 2715 2716 2717 // k_mirror - may be primitive, this must be checked 2718 // is_interface_ptr - pre-checked for NULL 2719 jvmtiError 2720 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) { 2721 { 2722 bool result = false; 2723 if (!java_lang_Class::is_primitive(k_mirror)) { 2724 Klass* k = java_lang_Class::as_Klass(k_mirror); 2725 if (k != NULL && k->is_interface()) { 2726 result = true; 2727 } 2728 } 2729 *is_interface_ptr = result; 2730 } 2731 2732 return JVMTI_ERROR_NONE; 2733 } /* end IsInterface */ 2734 2735 2736 // k_mirror - may be primitive, this must be checked 2737 // is_array_class_ptr - pre-checked for NULL 2738 jvmtiError 2739 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) { 2740 { 2741 bool result = false; 2742 if (!java_lang_Class::is_primitive(k_mirror)) { 2743 Klass* k = java_lang_Class::as_Klass(k_mirror); 2744 if (k != NULL && k->is_array_klass()) { 2745 result = true; 2746 } 2747 } 2748 *is_array_class_ptr = result; 2749 } 2750 2751 return JVMTI_ERROR_NONE; 2752 } /* end IsArrayClass */ 2753 2754 2755 // k_mirror - may be primitive, this must be checked 2756 // classloader_ptr - pre-checked for NULL 2757 jvmtiError 2758 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) { 2759 { 2760 if (java_lang_Class::is_primitive(k_mirror)) { 2761 *classloader_ptr = (jclass) jni_reference(Handle()); 2762 return JVMTI_ERROR_NONE; 2763 } 2764 JavaThread* current_thread = JavaThread::current(); 2765 HandleMark hm(current_thread); 2766 Klass* k = java_lang_Class::as_Klass(k_mirror); 2767 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2768 2769 oop result_oop = k->class_loader(); 2770 if (result_oop == NULL) { 2771 *classloader_ptr = (jclass) jni_reference(Handle()); 2772 return JVMTI_ERROR_NONE; 2773 } 2774 Handle result_handle = Handle(current_thread, result_oop); 2775 jclass result_jnihandle = (jclass) jni_reference(result_handle); 2776 *classloader_ptr = result_jnihandle; 2777 } 2778 return JVMTI_ERROR_NONE; 2779 } /* end GetClassLoader */ 2780 2781 2782 // k_mirror - may be primitive, this must be checked 2783 // source_debug_extension_ptr - pre-checked for NULL 2784 jvmtiError 2785 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) { 2786 { 2787 if (java_lang_Class::is_primitive(k_mirror)) { 2788 return JVMTI_ERROR_ABSENT_INFORMATION; 2789 } 2790 Klass* k = java_lang_Class::as_Klass(k_mirror); 2791 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2792 if (!k->is_instance_klass()) { 2793 return JVMTI_ERROR_ABSENT_INFORMATION; 2794 } 2795 const char* sde = InstanceKlass::cast(k)->source_debug_extension(); 2796 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION); 2797 2798 { 2799 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1); 2800 strcpy(*source_debug_extension_ptr, sde); 2801 } 2802 } 2803 2804 return JVMTI_ERROR_NONE; 2805 } /* end GetSourceDebugExtension */ 2806 2807 // 2808 // Object functions 2809 // 2810 2811 // hash_code_ptr - pre-checked for NULL 2812 jvmtiError 2813 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) { 2814 oop mirror = JNIHandles::resolve_external_guard(object); 2815 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 2816 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER); 2817 2818 { 2819 jint result = (jint) mirror->identity_hash(); 2820 *hash_code_ptr = result; 2821 } 2822 return JVMTI_ERROR_NONE; 2823 } /* end GetObjectHashCode */ 2824 2825 2826 // info_ptr - pre-checked for NULL 2827 jvmtiError 2828 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) { 2829 JavaThread* calling_thread = JavaThread::current(); 2830 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr); 2831 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) { 2832 // Some of the critical threads were not suspended. go to a safepoint and try again 2833 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr); 2834 VMThread::execute(&op); 2835 err = op.result(); 2836 } 2837 return err; 2838 } /* end GetObjectMonitorUsage */ 2839 2840 2841 // 2842 // Field functions 2843 // 2844 2845 // name_ptr - NULL is a valid value, must be checked 2846 // signature_ptr - NULL is a valid value, must be checked 2847 // generic_ptr - NULL is a valid value, must be checked 2848 jvmtiError 2849 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2850 JavaThread* current_thread = JavaThread::current(); 2851 ResourceMark rm(current_thread); 2852 if (name_ptr == NULL) { 2853 // just don't return the name 2854 } else { 2855 const char* fieldName = fdesc_ptr->name()->as_C_string(); 2856 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1); 2857 if (*name_ptr == NULL) 2858 return JVMTI_ERROR_OUT_OF_MEMORY; 2859 strcpy(*name_ptr, fieldName); 2860 } 2861 if (signature_ptr== NULL) { 2862 // just don't return the signature 2863 } else { 2864 const char* fieldSignature = fdesc_ptr->signature()->as_C_string(); 2865 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1); 2866 if (*signature_ptr == NULL) 2867 return JVMTI_ERROR_OUT_OF_MEMORY; 2868 strcpy(*signature_ptr, fieldSignature); 2869 } 2870 if (generic_ptr != NULL) { 2871 *generic_ptr = NULL; 2872 Symbol* soop = fdesc_ptr->generic_signature(); 2873 if (soop != NULL) { 2874 const char* gen_sig = soop->as_C_string(); 2875 if (gen_sig != NULL) { 2876 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2877 if (err != JVMTI_ERROR_NONE) { 2878 return err; 2879 } 2880 strcpy(*generic_ptr, gen_sig); 2881 } 2882 } 2883 } 2884 return JVMTI_ERROR_NONE; 2885 } /* end GetFieldName */ 2886 2887 2888 // declaring_class_ptr - pre-checked for NULL 2889 jvmtiError 2890 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) { 2891 2892 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder()); 2893 return JVMTI_ERROR_NONE; 2894 } /* end GetFieldDeclaringClass */ 2895 2896 2897 // modifiers_ptr - pre-checked for NULL 2898 jvmtiError 2899 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) { 2900 2901 AccessFlags resultFlags = fdesc_ptr->access_flags(); 2902 jint result = resultFlags.as_int(); 2903 *modifiers_ptr = result; 2904 2905 return JVMTI_ERROR_NONE; 2906 } /* end GetFieldModifiers */ 2907 2908 2909 // is_synthetic_ptr - pre-checked for NULL 2910 jvmtiError 2911 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) { 2912 *is_synthetic_ptr = fdesc_ptr->is_synthetic(); 2913 return JVMTI_ERROR_NONE; 2914 } /* end IsFieldSynthetic */ 2915 2916 2917 // 2918 // Method functions 2919 // 2920 2921 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2922 // name_ptr - NULL is a valid value, must be checked 2923 // signature_ptr - NULL is a valid value, must be checked 2924 // generic_ptr - NULL is a valid value, must be checked 2925 jvmtiError 2926 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2927 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2928 JavaThread* current_thread = JavaThread::current(); 2929 2930 ResourceMark rm(current_thread); // get the utf8 name and signature 2931 if (name_ptr == NULL) { 2932 // just don't return the name 2933 } else { 2934 const char* utf8_name = (const char *) method_oop->name()->as_utf8(); 2935 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1); 2936 strcpy(*name_ptr, utf8_name); 2937 } 2938 if (signature_ptr == NULL) { 2939 // just don't return the signature 2940 } else { 2941 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8(); 2942 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1); 2943 strcpy(*signature_ptr, utf8_signature); 2944 } 2945 2946 if (generic_ptr != NULL) { 2947 *generic_ptr = NULL; 2948 Symbol* soop = method_oop->generic_signature(); 2949 if (soop != NULL) { 2950 const char* gen_sig = soop->as_C_string(); 2951 if (gen_sig != NULL) { 2952 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2953 if (err != JVMTI_ERROR_NONE) { 2954 return err; 2955 } 2956 strcpy(*generic_ptr, gen_sig); 2957 } 2958 } 2959 } 2960 return JVMTI_ERROR_NONE; 2961 } /* end GetMethodName */ 2962 2963 2964 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2965 // declaring_class_ptr - pre-checked for NULL 2966 jvmtiError 2967 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) { 2968 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2969 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder()); 2970 return JVMTI_ERROR_NONE; 2971 } /* end GetMethodDeclaringClass */ 2972 2973 2974 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2975 // modifiers_ptr - pre-checked for NULL 2976 jvmtiError 2977 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) { 2978 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2979 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2980 return JVMTI_ERROR_NONE; 2981 } /* end GetMethodModifiers */ 2982 2983 2984 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2985 // max_ptr - pre-checked for NULL 2986 jvmtiError 2987 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) { 2988 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2989 // get max stack 2990 (*max_ptr) = method_oop->max_locals(); 2991 return JVMTI_ERROR_NONE; 2992 } /* end GetMaxLocals */ 2993 2994 2995 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2996 // size_ptr - pre-checked for NULL 2997 jvmtiError 2998 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) { 2999 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3000 // get size of arguments 3001 3002 (*size_ptr) = method_oop->size_of_parameters(); 3003 return JVMTI_ERROR_NONE; 3004 } /* end GetArgumentsSize */ 3005 3006 3007 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3008 // entry_count_ptr - pre-checked for NULL 3009 // table_ptr - pre-checked for NULL 3010 jvmtiError 3011 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) { 3012 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3013 if (!method_oop->has_linenumber_table()) { 3014 return (JVMTI_ERROR_ABSENT_INFORMATION); 3015 } 3016 3017 // The line number table is compressed so we don't know how big it is until decompressed. 3018 // Decompression is really fast so we just do it twice. 3019 3020 // Compute size of table 3021 jint num_entries = 0; 3022 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 3023 while (stream.read_pair()) { 3024 num_entries++; 3025 } 3026 jvmtiLineNumberEntry *jvmti_table = 3027 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry))); 3028 3029 // Fill jvmti table 3030 if (num_entries > 0) { 3031 int index = 0; 3032 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 3033 while (stream.read_pair()) { 3034 jvmti_table[index].start_location = (jlocation) stream.bci(); 3035 jvmti_table[index].line_number = (jint) stream.line(); 3036 index++; 3037 } 3038 assert(index == num_entries, "sanity check"); 3039 } 3040 3041 // Set up results 3042 (*entry_count_ptr) = num_entries; 3043 (*table_ptr) = jvmti_table; 3044 3045 return JVMTI_ERROR_NONE; 3046 } /* end GetLineNumberTable */ 3047 3048 3049 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3050 // start_location_ptr - pre-checked for NULL 3051 // end_location_ptr - pre-checked for NULL 3052 jvmtiError 3053 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) { 3054 3055 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3056 // get start and end location 3057 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1); 3058 if (method_oop->code_size() == 0) { 3059 // there is no code so there is no start location 3060 (*start_location_ptr) = (jlocation)(-1); 3061 } else { 3062 (*start_location_ptr) = (jlocation)(0); 3063 } 3064 3065 return JVMTI_ERROR_NONE; 3066 } /* end GetMethodLocation */ 3067 3068 3069 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3070 // entry_count_ptr - pre-checked for NULL 3071 // table_ptr - pre-checked for NULL 3072 jvmtiError 3073 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) { 3074 3075 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3076 JavaThread* current_thread = JavaThread::current(); 3077 3078 // does the klass have any local variable information? 3079 InstanceKlass* ik = method_oop->method_holder(); 3080 if (!ik->access_flags().has_localvariable_table()) { 3081 return (JVMTI_ERROR_ABSENT_INFORMATION); 3082 } 3083 3084 ConstantPool* constants = method_oop->constants(); 3085 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION); 3086 3087 // in the vm localvariable table representation, 6 consecutive elements in the table 3088 // represent a 6-tuple of shorts 3089 // [start_pc, length, name_index, descriptor_index, signature_index, index] 3090 jint num_entries = method_oop->localvariable_table_length(); 3091 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *) 3092 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry))); 3093 3094 if (num_entries > 0) { 3095 LocalVariableTableElement* table = method_oop->localvariable_table_start(); 3096 for (int i = 0; i < num_entries; i++) { 3097 // get the 5 tuple information from the vm table 3098 jlocation start_location = (jlocation) table[i].start_bci; 3099 jint length = (jint) table[i].length; 3100 int name_index = (int) table[i].name_cp_index; 3101 int signature_index = (int) table[i].descriptor_cp_index; 3102 int generic_signature_index = (int) table[i].signature_cp_index; 3103 jint slot = (jint) table[i].slot; 3104 3105 // get utf8 name and signature 3106 char *name_buf = NULL; 3107 char *sig_buf = NULL; 3108 char *gen_sig_buf = NULL; 3109 { 3110 ResourceMark rm(current_thread); 3111 3112 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8(); 3113 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1); 3114 strcpy(name_buf, utf8_name); 3115 3116 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8(); 3117 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1); 3118 strcpy(sig_buf, utf8_signature); 3119 3120 if (generic_signature_index > 0) { 3121 const char *utf8_gen_sign = (const char *) 3122 constants->symbol_at(generic_signature_index)->as_utf8(); 3123 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1); 3124 strcpy(gen_sig_buf, utf8_gen_sign); 3125 } 3126 } 3127 3128 // fill in the jvmti local variable table 3129 jvmti_table[i].start_location = start_location; 3130 jvmti_table[i].length = length; 3131 jvmti_table[i].name = name_buf; 3132 jvmti_table[i].signature = sig_buf; 3133 jvmti_table[i].generic_signature = gen_sig_buf; 3134 jvmti_table[i].slot = slot; 3135 } 3136 } 3137 3138 // set results 3139 (*entry_count_ptr) = num_entries; 3140 (*table_ptr) = jvmti_table; 3141 3142 return JVMTI_ERROR_NONE; 3143 } /* end GetLocalVariableTable */ 3144 3145 3146 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3147 // bytecode_count_ptr - pre-checked for NULL 3148 // bytecodes_ptr - pre-checked for NULL 3149 jvmtiError 3150 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) { 3151 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3152 3153 HandleMark hm; 3154 methodHandle method(method_oop); 3155 jint size = (jint)method->code_size(); 3156 jvmtiError err = allocate(size, bytecodes_ptr); 3157 if (err != JVMTI_ERROR_NONE) { 3158 return err; 3159 } 3160 3161 (*bytecode_count_ptr) = size; 3162 // get byte codes 3163 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr); 3164 3165 return JVMTI_ERROR_NONE; 3166 } /* end GetBytecodes */ 3167 3168 3169 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3170 // is_native_ptr - pre-checked for NULL 3171 jvmtiError 3172 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) { 3173 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3174 (*is_native_ptr) = method_oop->is_native(); 3175 return JVMTI_ERROR_NONE; 3176 } /* end IsMethodNative */ 3177 3178 3179 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3180 // is_synthetic_ptr - pre-checked for NULL 3181 jvmtiError 3182 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) { 3183 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 3184 (*is_synthetic_ptr) = method_oop->is_synthetic(); 3185 return JVMTI_ERROR_NONE; 3186 } /* end IsMethodSynthetic */ 3187 3188 3189 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method 3190 // is_obsolete_ptr - pre-checked for NULL 3191 jvmtiError 3192 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) { 3193 if (use_version_1_0_semantics() && 3194 get_capabilities()->can_redefine_classes == 0) { 3195 // This JvmtiEnv requested version 1.0 semantics and this function 3196 // requires the can_redefine_classes capability in version 1.0 so 3197 // we need to return an error here. 3198 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3199 } 3200 3201 if (method_oop == NULL || method_oop->is_obsolete()) { 3202 *is_obsolete_ptr = true; 3203 } else { 3204 *is_obsolete_ptr = false; 3205 } 3206 return JVMTI_ERROR_NONE; 3207 } /* end IsMethodObsolete */ 3208 3209 // 3210 // Raw Monitor functions 3211 // 3212 3213 // name - pre-checked for NULL 3214 // monitor_ptr - pre-checked for NULL 3215 jvmtiError 3216 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) { 3217 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name); 3218 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY); 3219 3220 *monitor_ptr = (jrawMonitorID)rmonitor; 3221 3222 return JVMTI_ERROR_NONE; 3223 } /* end CreateRawMonitor */ 3224 3225 3226 // rmonitor - pre-checked for validity 3227 jvmtiError 3228 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) { 3229 if (Threads::number_of_threads() == 0) { 3230 // Remove this monitor from pending raw monitors list 3231 // if it has entered in onload or start phase. 3232 JvmtiPendingMonitors::destroy(rmonitor); 3233 } else { 3234 Thread* thread = Thread::current(); 3235 if (rmonitor->is_entered(thread)) { 3236 // The caller owns this monitor which we are about to destroy. 3237 // We exit the underlying synchronization object so that the 3238 // "delete monitor" call below can work without an assertion 3239 // failure on systems that don't like destroying synchronization 3240 // objects that are locked. 3241 int r; 3242 intptr_t recursion = rmonitor->recursions(); 3243 for (intptr_t i=0; i <= recursion; i++) { 3244 r = rmonitor->raw_exit(thread); 3245 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 3246 if (r != ObjectMonitor::OM_OK) { // robustness 3247 return JVMTI_ERROR_INTERNAL; 3248 } 3249 } 3250 } 3251 if (rmonitor->owner() != NULL) { 3252 // The caller is trying to destroy a monitor that is locked by 3253 // someone else. While this is not forbidden by the JVMTI 3254 // spec, it will cause an assertion failure on systems that don't 3255 // like destroying synchronization objects that are locked. 3256 // We indicate a problem with the error return (and leak the 3257 // monitor's memory). 3258 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3259 } 3260 } 3261 3262 delete rmonitor; 3263 3264 return JVMTI_ERROR_NONE; 3265 } /* end DestroyRawMonitor */ 3266 3267 3268 // rmonitor - pre-checked for validity 3269 jvmtiError 3270 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) { 3271 if (Threads::number_of_threads() == 0) { 3272 // No JavaThreads exist so ObjectMonitor enter cannot be 3273 // used, add this raw monitor to the pending list. 3274 // The pending monitors will be actually entered when 3275 // the VM is setup. 3276 // See transition_pending_raw_monitors in create_vm() 3277 // in thread.cpp. 3278 JvmtiPendingMonitors::enter(rmonitor); 3279 } else { 3280 int r = 0; 3281 Thread* thread = Thread::current(); 3282 3283 if (thread->is_Java_thread()) { 3284 JavaThread* current_thread = (JavaThread*)thread; 3285 3286 #ifdef PROPER_TRANSITIONS 3287 // Not really unknown but ThreadInVMfromNative does more than we want 3288 ThreadInVMfromUnknown __tiv; 3289 { 3290 ThreadBlockInVM __tbivm(current_thread); 3291 r = rmonitor->raw_enter(current_thread); 3292 } 3293 #else 3294 /* Transition to thread_blocked without entering vm state */ 3295 /* This is really evil. Normally you can't undo _thread_blocked */ 3296 /* transitions like this because it would cause us to miss a */ 3297 /* safepoint but since the thread was already in _thread_in_native */ 3298 /* the thread is not leaving a safepoint safe state and it will */ 3299 /* block when it tries to return from native. We can't safepoint */ 3300 /* block in here because we could deadlock the vmthread. Blech. */ 3301 3302 JavaThreadState state = current_thread->thread_state(); 3303 assert(state == _thread_in_native, "Must be _thread_in_native"); 3304 // frame should already be walkable since we are in native 3305 assert(!current_thread->has_last_Java_frame() || 3306 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3307 current_thread->set_thread_state(_thread_blocked); 3308 3309 r = rmonitor->raw_enter(current_thread); 3310 // restore state, still at a safepoint safe state 3311 current_thread->set_thread_state(state); 3312 3313 #endif /* PROPER_TRANSITIONS */ 3314 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked"); 3315 } else { 3316 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3317 r = rmonitor->raw_enter(thread); 3318 } else { 3319 ShouldNotReachHere(); 3320 } 3321 } 3322 3323 if (r != ObjectMonitor::OM_OK) { // robustness 3324 return JVMTI_ERROR_INTERNAL; 3325 } 3326 } 3327 return JVMTI_ERROR_NONE; 3328 } /* end RawMonitorEnter */ 3329 3330 3331 // rmonitor - pre-checked for validity 3332 jvmtiError 3333 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) { 3334 jvmtiError err = JVMTI_ERROR_NONE; 3335 3336 if (Threads::number_of_threads() == 0) { 3337 // No JavaThreads exist so just remove this monitor from the pending list. 3338 // Bool value from exit is false if rmonitor is not in the list. 3339 if (!JvmtiPendingMonitors::exit(rmonitor)) { 3340 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3341 } 3342 } else { 3343 int r = 0; 3344 Thread* thread = Thread::current(); 3345 3346 if (thread->is_Java_thread()) { 3347 JavaThread* current_thread = (JavaThread*)thread; 3348 #ifdef PROPER_TRANSITIONS 3349 // Not really unknown but ThreadInVMfromNative does more than we want 3350 ThreadInVMfromUnknown __tiv; 3351 #endif /* PROPER_TRANSITIONS */ 3352 r = rmonitor->raw_exit(current_thread); 3353 } else { 3354 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3355 r = rmonitor->raw_exit(thread); 3356 } else { 3357 ShouldNotReachHere(); 3358 } 3359 } 3360 3361 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3362 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3363 } else { 3364 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 3365 if (r != ObjectMonitor::OM_OK) { // robustness 3366 err = JVMTI_ERROR_INTERNAL; 3367 } 3368 } 3369 } 3370 return err; 3371 } /* end RawMonitorExit */ 3372 3373 3374 // rmonitor - pre-checked for validity 3375 jvmtiError 3376 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) { 3377 int r = 0; 3378 Thread* thread = Thread::current(); 3379 3380 if (thread->is_Java_thread()) { 3381 JavaThread* current_thread = (JavaThread*)thread; 3382 #ifdef PROPER_TRANSITIONS 3383 // Not really unknown but ThreadInVMfromNative does more than we want 3384 ThreadInVMfromUnknown __tiv; 3385 { 3386 ThreadBlockInVM __tbivm(current_thread); 3387 r = rmonitor->raw_wait(millis, true, current_thread); 3388 } 3389 #else 3390 /* Transition to thread_blocked without entering vm state */ 3391 /* This is really evil. Normally you can't undo _thread_blocked */ 3392 /* transitions like this because it would cause us to miss a */ 3393 /* safepoint but since the thread was already in _thread_in_native */ 3394 /* the thread is not leaving a safepoint safe state and it will */ 3395 /* block when it tries to return from native. We can't safepoint */ 3396 /* block in here because we could deadlock the vmthread. Blech. */ 3397 3398 JavaThreadState state = current_thread->thread_state(); 3399 assert(state == _thread_in_native, "Must be _thread_in_native"); 3400 // frame should already be walkable since we are in native 3401 assert(!current_thread->has_last_Java_frame() || 3402 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3403 current_thread->set_thread_state(_thread_blocked); 3404 3405 r = rmonitor->raw_wait(millis, true, current_thread); 3406 // restore state, still at a safepoint safe state 3407 current_thread->set_thread_state(state); 3408 3409 #endif /* PROPER_TRANSITIONS */ 3410 } else { 3411 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3412 r = rmonitor->raw_wait(millis, true, thread); 3413 } else { 3414 ShouldNotReachHere(); 3415 } 3416 } 3417 3418 switch (r) { 3419 case ObjectMonitor::OM_INTERRUPTED: 3420 return JVMTI_ERROR_INTERRUPT; 3421 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE: 3422 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3423 } 3424 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked"); 3425 if (r != ObjectMonitor::OM_OK) { // robustness 3426 return JVMTI_ERROR_INTERNAL; 3427 } 3428 3429 return JVMTI_ERROR_NONE; 3430 } /* end RawMonitorWait */ 3431 3432 3433 // rmonitor - pre-checked for validity 3434 jvmtiError 3435 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) { 3436 int r = 0; 3437 Thread* thread = Thread::current(); 3438 3439 if (thread->is_Java_thread()) { 3440 JavaThread* current_thread = (JavaThread*)thread; 3441 // Not really unknown but ThreadInVMfromNative does more than we want 3442 ThreadInVMfromUnknown __tiv; 3443 r = rmonitor->raw_notify(current_thread); 3444 } else { 3445 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3446 r = rmonitor->raw_notify(thread); 3447 } else { 3448 ShouldNotReachHere(); 3449 } 3450 } 3451 3452 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3453 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3454 } 3455 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked"); 3456 if (r != ObjectMonitor::OM_OK) { // robustness 3457 return JVMTI_ERROR_INTERNAL; 3458 } 3459 3460 return JVMTI_ERROR_NONE; 3461 } /* end RawMonitorNotify */ 3462 3463 3464 // rmonitor - pre-checked for validity 3465 jvmtiError 3466 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) { 3467 int r = 0; 3468 Thread* thread = Thread::current(); 3469 3470 if (thread->is_Java_thread()) { 3471 JavaThread* current_thread = (JavaThread*)thread; 3472 ThreadInVMfromUnknown __tiv; 3473 r = rmonitor->raw_notifyAll(current_thread); 3474 } else { 3475 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3476 r = rmonitor->raw_notifyAll(thread); 3477 } else { 3478 ShouldNotReachHere(); 3479 } 3480 } 3481 3482 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3483 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3484 } 3485 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked"); 3486 if (r != ObjectMonitor::OM_OK) { // robustness 3487 return JVMTI_ERROR_INTERNAL; 3488 } 3489 3490 return JVMTI_ERROR_NONE; 3491 } /* end RawMonitorNotifyAll */ 3492 3493 3494 // 3495 // JNI Function Interception functions 3496 // 3497 3498 3499 // function_table - pre-checked for NULL 3500 jvmtiError 3501 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) { 3502 // Copy jni function table at safepoint. 3503 VM_JNIFunctionTableCopier copier(function_table); 3504 VMThread::execute(&copier); 3505 3506 return JVMTI_ERROR_NONE; 3507 } /* end SetJNIFunctionTable */ 3508 3509 3510 // function_table - pre-checked for NULL 3511 jvmtiError 3512 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) { 3513 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface)); 3514 if (*function_table == NULL) 3515 return JVMTI_ERROR_OUT_OF_MEMORY; 3516 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface)); 3517 return JVMTI_ERROR_NONE; 3518 } /* end GetJNIFunctionTable */ 3519 3520 3521 // 3522 // Event Management functions 3523 // 3524 3525 jvmtiError 3526 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) { 3527 // can only generate two event types 3528 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD && 3529 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) { 3530 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3531 } 3532 3533 // for compiled_method_load events we must check that the environment 3534 // has the can_generate_compiled_method_load_events capability. 3535 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) { 3536 if (get_capabilities()->can_generate_compiled_method_load_events == 0) { 3537 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3538 } 3539 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this); 3540 } else { 3541 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this); 3542 } 3543 3544 } /* end GenerateEvents */ 3545 3546 3547 // 3548 // Extension Mechanism functions 3549 // 3550 3551 // extension_count_ptr - pre-checked for NULL 3552 // extensions - pre-checked for NULL 3553 jvmtiError 3554 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) { 3555 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions); 3556 } /* end GetExtensionFunctions */ 3557 3558 3559 // extension_count_ptr - pre-checked for NULL 3560 // extensions - pre-checked for NULL 3561 jvmtiError 3562 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) { 3563 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions); 3564 } /* end GetExtensionEvents */ 3565 3566 3567 // callback - NULL is a valid value, must be checked 3568 jvmtiError 3569 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) { 3570 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback); 3571 } /* end SetExtensionEventCallback */ 3572 3573 // 3574 // Timers functions 3575 // 3576 3577 // info_ptr - pre-checked for NULL 3578 jvmtiError 3579 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3580 os::current_thread_cpu_time_info(info_ptr); 3581 return JVMTI_ERROR_NONE; 3582 } /* end GetCurrentThreadCpuTimerInfo */ 3583 3584 3585 // nanos_ptr - pre-checked for NULL 3586 jvmtiError 3587 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) { 3588 *nanos_ptr = os::current_thread_cpu_time(); 3589 return JVMTI_ERROR_NONE; 3590 } /* end GetCurrentThreadCpuTime */ 3591 3592 3593 // info_ptr - pre-checked for NULL 3594 jvmtiError 3595 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3596 os::thread_cpu_time_info(info_ptr); 3597 return JVMTI_ERROR_NONE; 3598 } /* end GetThreadCpuTimerInfo */ 3599 3600 3601 // Threads_lock NOT held, java_thread not protected by lock 3602 // java_thread - pre-checked 3603 // nanos_ptr - pre-checked for NULL 3604 jvmtiError 3605 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) { 3606 *nanos_ptr = os::thread_cpu_time(java_thread); 3607 return JVMTI_ERROR_NONE; 3608 } /* end GetThreadCpuTime */ 3609 3610 3611 // info_ptr - pre-checked for NULL 3612 jvmtiError 3613 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) { 3614 os::javaTimeNanos_info(info_ptr); 3615 return JVMTI_ERROR_NONE; 3616 } /* end GetTimerInfo */ 3617 3618 3619 // nanos_ptr - pre-checked for NULL 3620 jvmtiError 3621 JvmtiEnv::GetTime(jlong* nanos_ptr) { 3622 *nanos_ptr = os::javaTimeNanos(); 3623 return JVMTI_ERROR_NONE; 3624 } /* end GetTime */ 3625 3626 3627 // processor_count_ptr - pre-checked for NULL 3628 jvmtiError 3629 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) { 3630 *processor_count_ptr = os::active_processor_count(); 3631 return JVMTI_ERROR_NONE; 3632 } /* end GetAvailableProcessors */ 3633 3634 // 3635 // System Properties functions 3636 // 3637 3638 // count_ptr - pre-checked for NULL 3639 // property_ptr - pre-checked for NULL 3640 jvmtiError 3641 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) { 3642 jvmtiError err = JVMTI_ERROR_NONE; 3643 3644 // Get the number of readable properties. 3645 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties()); 3646 3647 // Allocate memory to hold the exact number of readable properties. 3648 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr); 3649 if (err != JVMTI_ERROR_NONE) { 3650 return err; 3651 } 3652 int readable_count = 0; 3653 // Loop through the system properties until all the readable properties are found. 3654 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) { 3655 if (p->is_readable()) { 3656 const char *key = p->key(); 3657 char **tmp_value = *property_ptr+readable_count; 3658 readable_count++; 3659 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value); 3660 if (err == JVMTI_ERROR_NONE) { 3661 strcpy(*tmp_value, key); 3662 } else { 3663 // clean up previously allocated memory. 3664 for (int j=0; j<readable_count; j++) { 3665 Deallocate((unsigned char*)*property_ptr+j); 3666 } 3667 Deallocate((unsigned char*)property_ptr); 3668 break; 3669 } 3670 } 3671 } 3672 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count"); 3673 return err; 3674 } /* end GetSystemProperties */ 3675 3676 3677 // property - pre-checked for NULL 3678 // value_ptr - pre-checked for NULL 3679 jvmtiError 3680 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) { 3681 jvmtiError err = JVMTI_ERROR_NONE; 3682 const char *value; 3683 3684 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist. 3685 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property); 3686 if (value == NULL) { 3687 err = JVMTI_ERROR_NOT_AVAILABLE; 3688 } else { 3689 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr); 3690 if (err == JVMTI_ERROR_NONE) { 3691 strcpy(*value_ptr, value); 3692 } 3693 } 3694 return err; 3695 } /* end GetSystemProperty */ 3696 3697 3698 // property - pre-checked for NULL 3699 // value - NULL is a valid value, must be checked 3700 jvmtiError 3701 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) { 3702 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE; 3703 3704 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 3705 if (strcmp(property, p->key()) == 0) { 3706 if (p->set_writeable_value(value_ptr)) { 3707 err = JVMTI_ERROR_NONE; 3708 } 3709 } 3710 } 3711 return err; 3712 } /* end SetSystemProperty */