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