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