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