jvmtiEnv.cpp revision 3602:da91efe96a93
1/* 2 * Copyright (c) 2003, 2012, 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/systemDictionary.hpp" 27#include "classfile/vmSymbols.hpp" 28#include "interpreter/bytecodeStream.hpp" 29#include "interpreter/interpreter.hpp" 30#include "jvmtifiles/jvmtiEnv.hpp" 31#include "memory/resourceArea.hpp" 32#include "memory/universe.inline.hpp" 33#include "oops/instanceKlass.hpp" 34#include "prims/jniCheck.hpp" 35#include "prims/jvm_misc.hpp" 36#include "prims/jvmtiAgentThread.hpp" 37#include "prims/jvmtiClassFileReconstituter.hpp" 38#include "prims/jvmtiCodeBlobEvents.hpp" 39#include "prims/jvmtiExtensions.hpp" 40#include "prims/jvmtiGetLoadedClasses.hpp" 41#include "prims/jvmtiImpl.hpp" 42#include "prims/jvmtiManageCapabilities.hpp" 43#include "prims/jvmtiRawMonitor.hpp" 44#include "prims/jvmtiRedefineClasses.hpp" 45#include "prims/jvmtiTagMap.hpp" 46#include "prims/jvmtiThreadState.inline.hpp" 47#include "prims/jvmtiUtil.hpp" 48#include "runtime/arguments.hpp" 49#include "runtime/deoptimization.hpp" 50#include "runtime/interfaceSupport.hpp" 51#include "runtime/javaCalls.hpp" 52#include "runtime/jfieldIDWorkaround.hpp" 53#include "runtime/osThread.hpp" 54#include "runtime/reflectionUtils.hpp" 55#include "runtime/signature.hpp" 56#include "runtime/vframe.hpp" 57#include "runtime/vmThread.hpp" 58#include "services/threadService.hpp" 59#include "utilities/exceptions.hpp" 60#include "utilities/preserveException.hpp" 61#ifdef TARGET_OS_FAMILY_linux 62# include "thread_linux.inline.hpp" 63#endif 64#ifdef TARGET_OS_FAMILY_solaris 65# include "thread_solaris.inline.hpp" 66#endif 67#ifdef TARGET_OS_FAMILY_windows 68# include "thread_windows.inline.hpp" 69#endif 70#ifdef TARGET_OS_FAMILY_bsd 71# include "thread_bsd.inline.hpp" 72#endif 73 74 75 76#define FIXLATER 0 // REMOVE this when completed. 77 78 // FIXLATER: hook into JvmtiTrace 79#define TraceJVMTICalls false 80 81JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) { 82} 83 84JvmtiEnv::~JvmtiEnv() { 85} 86 87JvmtiEnv* 88JvmtiEnv::create_a_jvmti(jint version) { 89 return new JvmtiEnv(version); 90} 91 92// VM operation class to copy jni function table at safepoint. 93// More than one java threads or jvmti agents may be reading/ 94// modifying jni function tables. To reduce the risk of bad 95// interaction b/w these threads it is copied at safepoint. 96class VM_JNIFunctionTableCopier : public VM_Operation { 97 private: 98 const struct JNINativeInterface_ *_function_table; 99 public: 100 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) { 101 _function_table = func_tbl; 102 }; 103 104 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; } 105 void doit() { 106 copy_jni_function_table(_function_table); 107 }; 108}; 109 110// 111// Do not change the "prefix" marker below, everything above it is copied 112// unchanged into the filled stub, everything below is controlled by the 113// stub filler (only method bodies are carried forward, and then only for 114// functionality still in the spec). 115// 116// end file prefix 117 118 // 119 // Memory Management functions 120 // 121 122// mem_ptr - pre-checked for NULL 123jvmtiError 124JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) { 125 return allocate(size, mem_ptr); 126} /* end Allocate */ 127 128 129// mem - NULL is a valid value, must be checked 130jvmtiError 131JvmtiEnv::Deallocate(unsigned char* mem) { 132 return deallocate(mem); 133} /* end Deallocate */ 134 135// Threads_lock NOT held, java_thread not protected by lock 136// java_thread - pre-checked 137// data - NULL is a valid value, must be checked 138jvmtiError 139JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) { 140 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 141 if (state == NULL) { 142 if (data == NULL) { 143 // leaving state unset same as data set to NULL 144 return JVMTI_ERROR_NONE; 145 } 146 // otherwise, create the state 147 state = JvmtiThreadState::state_for(java_thread); 148 if (state == NULL) { 149 return JVMTI_ERROR_THREAD_NOT_ALIVE; 150 } 151 } 152 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data); 153 return JVMTI_ERROR_NONE; 154} /* end SetThreadLocalStorage */ 155 156 157// Threads_lock NOT held 158// thread - NOT pre-checked 159// data_ptr - pre-checked for NULL 160jvmtiError 161JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) { 162 JavaThread* current_thread = JavaThread::current(); 163 if (thread == NULL) { 164 JvmtiThreadState* state = current_thread->jvmti_thread_state(); 165 *data_ptr = (state == NULL) ? NULL : 166 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 167 } else { 168 169 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition 170 // the thread to _thread_in_vm. However, when the TLS for a thread 171 // other than the current thread is required we need to transition 172 // from native so as to resolve the jthread. 173 174 ThreadInVMfromNative __tiv(current_thread); 175 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread) 176 debug_only(VMNativeEntryWrapper __vew;) 177 178 oop thread_oop = JNIHandles::resolve_external_guard(thread); 179 if (thread_oop == NULL) { 180 return JVMTI_ERROR_INVALID_THREAD; 181 } 182 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 183 return JVMTI_ERROR_INVALID_THREAD; 184 } 185 JavaThread* java_thread = java_lang_Thread::thread(thread_oop); 186 if (java_thread == NULL) { 187 return JVMTI_ERROR_THREAD_NOT_ALIVE; 188 } 189 JvmtiThreadState* state = java_thread->jvmti_thread_state(); 190 *data_ptr = (state == NULL) ? NULL : 191 state->env_thread_state(this)->get_agent_thread_local_storage_data(); 192 } 193 return JVMTI_ERROR_NONE; 194} /* end GetThreadLocalStorage */ 195 196 // 197 // Class functions 198 // 199 200// class_count_ptr - pre-checked for NULL 201// classes_ptr - pre-checked for NULL 202jvmtiError 203JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) { 204 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr); 205} /* end GetLoadedClasses */ 206 207 208// initiating_loader - NULL is a valid value, must be checked 209// class_count_ptr - pre-checked for NULL 210// classes_ptr - pre-checked for NULL 211jvmtiError 212JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) { 213 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader, 214 class_count_ptr, classes_ptr); 215} /* end GetClassLoaderClasses */ 216 217// k_mirror - may be primitive, this must be checked 218// is_modifiable_class_ptr - pre-checked for NULL 219jvmtiError 220JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) { 221 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)? 222 JNI_TRUE : JNI_FALSE; 223 return JVMTI_ERROR_NONE; 224} /* end IsModifiableClass */ 225 226// class_count - pre-checked to be greater than or equal to 0 227// classes - pre-checked for NULL 228jvmtiError 229JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) { 230//TODO: add locking 231 232 int index; 233 JavaThread* current_thread = JavaThread::current(); 234 ResourceMark rm(current_thread); 235 236 jvmtiClassDefinition* class_definitions = 237 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count); 238 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY); 239 240 for (index = 0; index < class_count; index++) { 241 HandleMark hm(current_thread); 242 243 jclass jcls = classes[index]; 244 oop k_mirror = JNIHandles::resolve_external_guard(jcls); 245 if (k_mirror == NULL) { 246 return JVMTI_ERROR_INVALID_CLASS; 247 } 248 if (!k_mirror->is_a(SystemDictionary::Class_klass())) { 249 return JVMTI_ERROR_INVALID_CLASS; 250 } 251 252 if (java_lang_Class::is_primitive(k_mirror)) { 253 return JVMTI_ERROR_UNMODIFIABLE_CLASS; 254 } 255 256 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 257 KlassHandle klass(current_thread, k_oop); 258 259 jint status = klass->jvmti_class_status(); 260 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 261 return JVMTI_ERROR_INVALID_CLASS; 262 } 263 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 264 return JVMTI_ERROR_UNMODIFIABLE_CLASS; 265 } 266 267 instanceKlassHandle ikh(current_thread, k_oop); 268 if (ikh->get_cached_class_file_bytes() == NULL) { 269 // Not cached, we need to reconstitute the class file from the 270 // VM representation. We don't attach the reconstituted class 271 // bytes to the InstanceKlass here because they have not been 272 // validated and we're not at a safepoint. 273 constantPoolHandle constants(current_thread, ikh->constants()); 274 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it 275 276 JvmtiClassFileReconstituter reconstituter(ikh); 277 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 278 return reconstituter.get_error(); 279 } 280 281 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size(); 282 class_definitions[index].class_bytes = (unsigned char*) 283 reconstituter.class_file_bytes(); 284 } else { 285 // it is cached, get it from the cache 286 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len(); 287 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes(); 288 } 289 class_definitions[index].klass = jcls; 290 } 291 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform); 292 VMThread::execute(&op); 293 return (op.check_error()); 294} /* end RetransformClasses */ 295 296 297// class_count - pre-checked to be greater than or equal to 0 298// class_definitions - pre-checked for NULL 299jvmtiError 300JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) { 301//TODO: add locking 302 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine); 303 VMThread::execute(&op); 304 return (op.check_error()); 305} /* end RedefineClasses */ 306 307 308 // 309 // Object functions 310 // 311 312// size_ptr - pre-checked for NULL 313jvmtiError 314JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) { 315 oop mirror = JNIHandles::resolve_external_guard(object); 316 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 317 318 if (mirror->klass() == SystemDictionary::Class_klass() && 319 !java_lang_Class::is_primitive(mirror)) { 320 Klass* k = java_lang_Class::as_Klass(mirror); 321 assert(k != NULL, "class for non-primitive mirror must exist"); 322 *size_ptr = k->size() * wordSize; 323 } else { 324 *size_ptr = mirror->size() * wordSize; 325 } 326 return JVMTI_ERROR_NONE; 327} /* end GetObjectSize */ 328 329 // 330 // Method functions 331 // 332 333// prefix - NULL is a valid value, must be checked 334jvmtiError 335JvmtiEnv::SetNativeMethodPrefix(const char* prefix) { 336 return prefix == NULL? 337 SetNativeMethodPrefixes(0, NULL) : 338 SetNativeMethodPrefixes(1, (char**)&prefix); 339} /* end SetNativeMethodPrefix */ 340 341 342// prefix_count - pre-checked to be greater than or equal to 0 343// prefixes - pre-checked for NULL 344jvmtiError 345JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) { 346 // Have to grab JVMTI thread state lock to be sure that some thread 347 // isn't accessing the prefixes at the same time we are setting them. 348 // No locks during VM bring-up. 349 if (Threads::number_of_threads() == 0) { 350 return set_native_method_prefixes(prefix_count, prefixes); 351 } else { 352 MutexLocker mu(JvmtiThreadState_lock); 353 return set_native_method_prefixes(prefix_count, prefixes); 354 } 355} /* end SetNativeMethodPrefixes */ 356 357 // 358 // Event Management functions 359 // 360 361// callbacks - NULL is a valid value, must be checked 362// size_of_callbacks - pre-checked to be greater than or equal to 0 363jvmtiError 364JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) { 365 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks); 366 return JVMTI_ERROR_NONE; 367} /* end SetEventCallbacks */ 368 369 370// event_thread - NULL is a valid value, must be checked 371jvmtiError 372JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) { 373 JavaThread* java_thread = NULL; 374 if (event_thread != NULL) { 375 oop thread_oop = JNIHandles::resolve_external_guard(event_thread); 376 if (thread_oop == NULL) { 377 return JVMTI_ERROR_INVALID_THREAD; 378 } 379 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 380 return JVMTI_ERROR_INVALID_THREAD; 381 } 382 java_thread = java_lang_Thread::thread(thread_oop); 383 if (java_thread == NULL) { 384 return JVMTI_ERROR_THREAD_NOT_ALIVE; 385 } 386 } 387 388 // event_type must be valid 389 if (!JvmtiEventController::is_valid_event_type(event_type)) { 390 return JVMTI_ERROR_INVALID_EVENT_TYPE; 391 } 392 393 // global events cannot be controlled at thread level. 394 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) { 395 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 396 } 397 398 bool enabled = (mode == JVMTI_ENABLE); 399 400 // assure that needed capabilities are present 401 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { 402 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 403 } 404 405 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { 406 record_class_file_load_hook_enabled(); 407 } 408 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled); 409 410 return JVMTI_ERROR_NONE; 411} /* end SetEventNotificationMode */ 412 413 // 414 // Capability functions 415 // 416 417// capabilities_ptr - pre-checked for NULL 418jvmtiError 419JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) { 420 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(), 421 get_prohibited_capabilities(), 422 capabilities_ptr); 423 return JVMTI_ERROR_NONE; 424} /* end GetPotentialCapabilities */ 425 426 427// capabilities_ptr - pre-checked for NULL 428jvmtiError 429JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) { 430 return JvmtiManageCapabilities::add_capabilities(get_capabilities(), 431 get_prohibited_capabilities(), 432 capabilities_ptr, 433 get_capabilities()); 434} /* end AddCapabilities */ 435 436 437// capabilities_ptr - pre-checked for NULL 438jvmtiError 439JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) { 440 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities()); 441 return JVMTI_ERROR_NONE; 442} /* end RelinquishCapabilities */ 443 444 445// capabilities_ptr - pre-checked for NULL 446jvmtiError 447JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) { 448 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr); 449 return JVMTI_ERROR_NONE; 450} /* end GetCapabilities */ 451 452 // 453 // Class Loader Search functions 454 // 455 456// segment - pre-checked for NULL 457jvmtiError 458JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) { 459 jvmtiPhase phase = get_phase(); 460 if (phase == JVMTI_PHASE_ONLOAD) { 461 Arguments::append_sysclasspath(segment); 462 return JVMTI_ERROR_NONE; 463 } else if (use_version_1_0_semantics()) { 464 // This JvmtiEnv requested version 1.0 semantics and this function 465 // is only allowed in the ONLOAD phase in version 1.0 so we need to 466 // return an error here. 467 return JVMTI_ERROR_WRONG_PHASE; 468 } else if (phase == JVMTI_PHASE_LIVE) { 469 // The phase is checked by the wrapper that called this function, 470 // but this thread could be racing with the thread that is 471 // terminating the VM so we check one more time. 472 473 // create the zip entry 474 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment); 475 if (zip_entry == NULL) { 476 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 477 } 478 479 // lock the loader 480 Thread* thread = Thread::current(); 481 HandleMark hm; 482 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock()); 483 484 ObjectLocker ol(loader_lock, thread); 485 486 // add the jar file to the bootclasspath 487 if (TraceClassLoading) { 488 tty->print_cr("[Opened %s]", zip_entry->name()); 489 } 490 ClassLoader::add_to_list(zip_entry); 491 return JVMTI_ERROR_NONE; 492 } else { 493 return JVMTI_ERROR_WRONG_PHASE; 494 } 495 496} /* end AddToBootstrapClassLoaderSearch */ 497 498 499// segment - pre-checked for NULL 500jvmtiError 501JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) { 502 jvmtiPhase phase = get_phase(); 503 504 if (phase == JVMTI_PHASE_ONLOAD) { 505 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 506 if (strcmp("java.class.path", p->key()) == 0) { 507 p->append_value(segment); 508 break; 509 } 510 } 511 return JVMTI_ERROR_NONE; 512 } else if (phase == JVMTI_PHASE_LIVE) { 513 // The phase is checked by the wrapper that called this function, 514 // but this thread could be racing with the thread that is 515 // terminating the VM so we check one more time. 516 HandleMark hm; 517 518 // create the zip entry (which will open the zip file and hence 519 // check that the segment is indeed a zip file). 520 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment); 521 if (zip_entry == NULL) { 522 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 523 } 524 delete zip_entry; // no longer needed 525 526 // lock the loader 527 Thread* THREAD = Thread::current(); 528 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 529 530 ObjectLocker ol(loader, THREAD); 531 532 // need the path as java.lang.String 533 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD); 534 if (HAS_PENDING_EXCEPTION) { 535 CLEAR_PENDING_EXCEPTION; 536 return JVMTI_ERROR_INTERNAL; 537 } 538 539 instanceKlassHandle loader_ik(THREAD, loader->klass()); 540 541 // Invoke the appendToClassPathForInstrumentation method - if the method 542 // is not found it means the loader doesn't support adding to the class path 543 // in the live phase. 544 { 545 JavaValue res(T_VOID); 546 JavaCalls::call_special(&res, 547 loader, 548 loader_ik, 549 vmSymbols::appendToClassPathForInstrumentation_name(), 550 vmSymbols::appendToClassPathForInstrumentation_signature(), 551 path, 552 THREAD); 553 if (HAS_PENDING_EXCEPTION) { 554 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 555 CLEAR_PENDING_EXCEPTION; 556 557 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) { 558 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED; 559 } else { 560 return JVMTI_ERROR_INTERNAL; 561 } 562 } 563 } 564 565 return JVMTI_ERROR_NONE; 566 } else { 567 return JVMTI_ERROR_WRONG_PHASE; 568 } 569} /* end AddToSystemClassLoaderSearch */ 570 571 // 572 // General functions 573 // 574 575// phase_ptr - pre-checked for NULL 576jvmtiError 577JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) { 578 *phase_ptr = get_phase(); 579 return JVMTI_ERROR_NONE; 580} /* end GetPhase */ 581 582 583jvmtiError 584JvmtiEnv::DisposeEnvironment() { 585 dispose(); 586 return JVMTI_ERROR_NONE; 587} /* end DisposeEnvironment */ 588 589 590// data - NULL is a valid value, must be checked 591jvmtiError 592JvmtiEnv::SetEnvironmentLocalStorage(const void* data) { 593 set_env_local_storage(data); 594 return JVMTI_ERROR_NONE; 595} /* end SetEnvironmentLocalStorage */ 596 597 598// data_ptr - pre-checked for NULL 599jvmtiError 600JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) { 601 *data_ptr = (void*)get_env_local_storage(); 602 return JVMTI_ERROR_NONE; 603} /* end GetEnvironmentLocalStorage */ 604 605// version_ptr - pre-checked for NULL 606jvmtiError 607JvmtiEnv::GetVersionNumber(jint* version_ptr) { 608 *version_ptr = JVMTI_VERSION; 609 return JVMTI_ERROR_NONE; 610} /* end GetVersionNumber */ 611 612 613// name_ptr - pre-checked for NULL 614jvmtiError 615JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) { 616 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) { 617 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 618 } 619 const char *name = JvmtiUtil::error_name(error); 620 if (name == NULL) { 621 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 622 } 623 size_t len = strlen(name) + 1; 624 jvmtiError err = allocate(len, (unsigned char**)name_ptr); 625 if (err == JVMTI_ERROR_NONE) { 626 memcpy(*name_ptr, name, len); 627 } 628 return err; 629} /* end GetErrorName */ 630 631 632jvmtiError 633JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) { 634 switch (flag) { 635 case JVMTI_VERBOSE_OTHER: 636 // ignore 637 break; 638 case JVMTI_VERBOSE_CLASS: 639 TraceClassLoading = value != 0; 640 TraceClassUnloading = value != 0; 641 break; 642 case JVMTI_VERBOSE_GC: 643 PrintGC = value != 0; 644 break; 645 case JVMTI_VERBOSE_JNI: 646 PrintJNIResolving = value != 0; 647 break; 648 default: 649 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 650 }; 651 return JVMTI_ERROR_NONE; 652} /* end SetVerboseFlag */ 653 654 655// format_ptr - pre-checked for NULL 656jvmtiError 657JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) { 658 *format_ptr = JVMTI_JLOCATION_JVMBCI; 659 return JVMTI_ERROR_NONE; 660} /* end GetJLocationFormat */ 661 662#ifndef JVMTI_KERNEL 663 664 // 665 // Thread functions 666 // 667 668// Threads_lock NOT held 669// thread - NOT pre-checked 670// thread_state_ptr - pre-checked for NULL 671jvmtiError 672JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) { 673 jint state; 674 oop thread_oop; 675 JavaThread* thr; 676 677 if (thread == NULL) { 678 thread_oop = JavaThread::current()->threadObj(); 679 } else { 680 thread_oop = JNIHandles::resolve_external_guard(thread); 681 } 682 683 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 684 return JVMTI_ERROR_INVALID_THREAD; 685 } 686 687 // get most state bits 688 state = (jint)java_lang_Thread::get_thread_status(thread_oop); 689 690 // add more state bits 691 thr = java_lang_Thread::thread(thread_oop); 692 if (thr != NULL) { 693 JavaThreadState jts = thr->thread_state(); 694 695 if (thr->is_being_ext_suspended()) { 696 state |= JVMTI_THREAD_STATE_SUSPENDED; 697 } 698 if (jts == _thread_in_native) { 699 state |= JVMTI_THREAD_STATE_IN_NATIVE; 700 } 701 OSThread* osThread = thr->osthread(); 702 if (osThread != NULL && osThread->interrupted()) { 703 state |= JVMTI_THREAD_STATE_INTERRUPTED; 704 } 705 } 706 707 *thread_state_ptr = state; 708 return JVMTI_ERROR_NONE; 709} /* end GetThreadState */ 710 711 712// thread_ptr - pre-checked for NULL 713jvmtiError 714JvmtiEnv::GetCurrentThread(jthread* thread_ptr) { 715 JavaThread* current_thread = JavaThread::current(); 716 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj()); 717 return JVMTI_ERROR_NONE; 718} /* end GetCurrentThread */ 719 720 721// threads_count_ptr - pre-checked for NULL 722// threads_ptr - pre-checked for NULL 723jvmtiError 724JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) { 725 int nthreads = 0; 726 Handle *thread_objs = NULL; 727 ResourceMark rm; 728 HandleMark hm; 729 730 // enumerate threads (including agent threads) 731 ThreadsListEnumerator tle(Thread::current(), true); 732 nthreads = tle.num_threads(); 733 *threads_count_ptr = nthreads; 734 735 if (nthreads == 0) { 736 *threads_ptr = NULL; 737 return JVMTI_ERROR_NONE; 738 } 739 740 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads); 741 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY); 742 743 for (int i=0; i < nthreads; i++) { 744 thread_objs[i] = Handle(tle.get_threadObj(i)); 745 } 746 747 // have to make global handles outside of Threads_lock 748 jthread *jthreads = new_jthreadArray(nthreads, thread_objs); 749 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY); 750 751 *threads_ptr = jthreads; 752 return JVMTI_ERROR_NONE; 753} /* end GetAllThreads */ 754 755 756// Threads_lock NOT held, java_thread not protected by lock 757// java_thread - pre-checked 758jvmtiError 759JvmtiEnv::SuspendThread(JavaThread* java_thread) { 760 // don't allow hidden thread suspend request. 761 if (java_thread->is_hidden_from_external_view()) { 762 return (JVMTI_ERROR_NONE); 763 } 764 765 { 766 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 767 if (java_thread->is_external_suspend()) { 768 // don't allow nested external suspend requests. 769 return (JVMTI_ERROR_THREAD_SUSPENDED); 770 } 771 if (java_thread->is_exiting()) { // thread is in the process of exiting 772 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 773 } 774 java_thread->set_external_suspend(); 775 } 776 777 if (!JvmtiSuspendControl::suspend(java_thread)) { 778 // the thread was in the process of exiting 779 return (JVMTI_ERROR_THREAD_NOT_ALIVE); 780 } 781 return JVMTI_ERROR_NONE; 782} /* end SuspendThread */ 783 784 785// request_count - pre-checked to be greater than or equal to 0 786// request_list - pre-checked for NULL 787// results - pre-checked for NULL 788jvmtiError 789JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 790 int needSafepoint = 0; // > 0 if we need a safepoint 791 for (int i = 0; i < request_count; i++) { 792 JavaThread *java_thread = get_JavaThread(request_list[i]); 793 if (java_thread == NULL) { 794 results[i] = JVMTI_ERROR_INVALID_THREAD; 795 continue; 796 } 797 // the thread has not yet run or has exited (not on threads list) 798 if (java_thread->threadObj() == NULL) { 799 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 800 continue; 801 } 802 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) { 803 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 804 continue; 805 } 806 // don't allow hidden thread suspend request. 807 if (java_thread->is_hidden_from_external_view()) { 808 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 809 continue; 810 } 811 812 { 813 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); 814 if (java_thread->is_external_suspend()) { 815 // don't allow nested external suspend requests. 816 results[i] = JVMTI_ERROR_THREAD_SUSPENDED; 817 continue; 818 } 819 if (java_thread->is_exiting()) { // thread is in the process of exiting 820 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 821 continue; 822 } 823 java_thread->set_external_suspend(); 824 } 825 if (java_thread->thread_state() == _thread_in_native) { 826 // We need to try and suspend native threads here. Threads in 827 // other states will self-suspend on their next transition. 828 if (!JvmtiSuspendControl::suspend(java_thread)) { 829 // The thread was in the process of exiting. Force another 830 // safepoint to make sure that this thread transitions. 831 needSafepoint++; 832 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; 833 continue; 834 } 835 } else { 836 needSafepoint++; 837 } 838 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 839 } 840 if (needSafepoint > 0) { 841 VM_ForceSafepoint vfs; 842 VMThread::execute(&vfs); 843 } 844 // per-thread suspend results returned via results parameter 845 return JVMTI_ERROR_NONE; 846} /* end SuspendThreadList */ 847 848 849// Threads_lock NOT held, java_thread not protected by lock 850// java_thread - pre-checked 851jvmtiError 852JvmtiEnv::ResumeThread(JavaThread* java_thread) { 853 // don't allow hidden thread resume request. 854 if (java_thread->is_hidden_from_external_view()) { 855 return JVMTI_ERROR_NONE; 856 } 857 858 if (!java_thread->is_being_ext_suspended()) { 859 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 860 } 861 862 if (!JvmtiSuspendControl::resume(java_thread)) { 863 return JVMTI_ERROR_INTERNAL; 864 } 865 return JVMTI_ERROR_NONE; 866} /* end ResumeThread */ 867 868 869// request_count - pre-checked to be greater than or equal to 0 870// request_list - pre-checked for NULL 871// results - pre-checked for NULL 872jvmtiError 873JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { 874 for (int i = 0; i < request_count; i++) { 875 JavaThread *java_thread = get_JavaThread(request_list[i]); 876 if (java_thread == NULL) { 877 results[i] = JVMTI_ERROR_INVALID_THREAD; 878 continue; 879 } 880 // don't allow hidden thread resume request. 881 if (java_thread->is_hidden_from_external_view()) { 882 results[i] = JVMTI_ERROR_NONE; // indicate successful resume 883 continue; 884 } 885 if (!java_thread->is_being_ext_suspended()) { 886 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED; 887 continue; 888 } 889 890 if (!JvmtiSuspendControl::resume(java_thread)) { 891 results[i] = JVMTI_ERROR_INTERNAL; 892 continue; 893 } 894 895 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend 896 } 897 // per-thread resume results returned via results parameter 898 return JVMTI_ERROR_NONE; 899} /* end ResumeThreadList */ 900 901 902// Threads_lock NOT held, java_thread not protected by lock 903// java_thread - pre-checked 904jvmtiError 905JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) { 906 oop e = JNIHandles::resolve_external_guard(exception); 907 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER); 908 909 JavaThread::send_async_exception(java_thread->threadObj(), e); 910 911 return JVMTI_ERROR_NONE; 912 913} /* end StopThread */ 914 915 916// Threads_lock NOT held 917// thread - NOT pre-checked 918jvmtiError 919JvmtiEnv::InterruptThread(jthread thread) { 920 oop thread_oop = JNIHandles::resolve_external_guard(thread); 921 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) 922 return JVMTI_ERROR_INVALID_THREAD; 923 924 JavaThread* current_thread = JavaThread::current(); 925 926 // Todo: this is a duplicate of JVM_Interrupt; share code in future 927 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 928 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock); 929 // We need to re-resolve the java_thread, since a GC might have happened during the 930 // acquire of the lock 931 932 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread)); 933 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE); 934 935 Thread::interrupt(java_thread); 936 937 return JVMTI_ERROR_NONE; 938} /* end InterruptThread */ 939 940 941// Threads_lock NOT held 942// thread - NOT pre-checked 943// info_ptr - pre-checked for NULL 944jvmtiError 945JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) { 946 ResourceMark rm; 947 HandleMark hm; 948 949 JavaThread* current_thread = JavaThread::current(); 950 951 // if thread is NULL the current thread is used 952 oop thread_oop; 953 if (thread == NULL) { 954 thread_oop = current_thread->threadObj(); 955 } else { 956 thread_oop = JNIHandles::resolve_external_guard(thread); 957 } 958 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) 959 return JVMTI_ERROR_INVALID_THREAD; 960 961 Handle thread_obj(current_thread, thread_oop); 962 typeArrayHandle name; 963 ThreadPriority priority; 964 Handle thread_group; 965 Handle context_class_loader; 966 bool is_daemon; 967 968 { MutexLocker mu(Threads_lock); 969 970 name = typeArrayHandle(current_thread, java_lang_Thread::name(thread_obj())); 971 priority = java_lang_Thread::priority(thread_obj()); 972 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj())); 973 is_daemon = java_lang_Thread::is_daemon(thread_obj()); 974 975 oop loader = java_lang_Thread::context_class_loader(thread_obj()); 976 context_class_loader = Handle(current_thread, loader); 977 } 978 { const char *n; 979 980 if (name() != NULL) { 981 n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); 982 } else { 983 n = UNICODE::as_utf8(NULL, 0); 984 } 985 986 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1); 987 if (info_ptr->name == NULL) 988 return JVMTI_ERROR_OUT_OF_MEMORY; 989 990 strcpy(info_ptr->name, n); 991 } 992 info_ptr->is_daemon = is_daemon; 993 info_ptr->priority = priority; 994 995 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL : 996 jni_reference(context_class_loader); 997 info_ptr->thread_group = jni_reference(thread_group); 998 999 return JVMTI_ERROR_NONE; 1000} /* end GetThreadInfo */ 1001 1002 1003// Threads_lock NOT held, java_thread not protected by lock 1004// java_thread - pre-checked 1005// owned_monitor_count_ptr - pre-checked for NULL 1006// owned_monitors_ptr - pre-checked for NULL 1007jvmtiError 1008JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) { 1009 jvmtiError err = JVMTI_ERROR_NONE; 1010 JavaThread* calling_thread = JavaThread::current(); 1011 1012 // growable array of jvmti monitors info on the C-heap 1013 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1014 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 1015 1016 uint32_t debug_bits = 0; 1017 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1018 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1019 } else { 1020 // JVMTI get monitors info at safepoint. Do not require target thread to 1021 // be suspended. 1022 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); 1023 VMThread::execute(&op); 1024 err = op.result(); 1025 } 1026 jint owned_monitor_count = owned_monitors_list->length(); 1027 if (err == JVMTI_ERROR_NONE) { 1028 if ((err = allocate(owned_monitor_count * sizeof(jobject *), 1029 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) { 1030 // copy into the returned array 1031 for (int i = 0; i < owned_monitor_count; i++) { 1032 (*owned_monitors_ptr)[i] = 1033 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1034 } 1035 *owned_monitor_count_ptr = owned_monitor_count; 1036 } 1037 } 1038 // clean up. 1039 for (int i = 0; i < owned_monitor_count; i++) { 1040 deallocate((unsigned char*)owned_monitors_list->at(i)); 1041 } 1042 delete owned_monitors_list; 1043 1044 return err; 1045} /* end GetOwnedMonitorInfo */ 1046 1047 1048// Threads_lock NOT held, java_thread not protected by lock 1049// java_thread - pre-checked 1050// monitor_info_count_ptr - pre-checked for NULL 1051// monitor_info_ptr - pre-checked for NULL 1052jvmtiError 1053JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) { 1054 jvmtiError err = JVMTI_ERROR_NONE; 1055 JavaThread* calling_thread = JavaThread::current(); 1056 1057 // growable array of jvmti monitors info on the C-heap 1058 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = 1059 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); 1060 1061 uint32_t debug_bits = 0; 1062 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1063 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); 1064 } else { 1065 // JVMTI get owned monitors info at safepoint. Do not require target thread to 1066 // be suspended. 1067 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); 1068 VMThread::execute(&op); 1069 err = op.result(); 1070 } 1071 1072 jint owned_monitor_count = owned_monitors_list->length(); 1073 if (err == JVMTI_ERROR_NONE) { 1074 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo), 1075 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) { 1076 // copy to output array. 1077 for (int i = 0; i < owned_monitor_count; i++) { 1078 (*monitor_info_ptr)[i].monitor = 1079 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; 1080 (*monitor_info_ptr)[i].stack_depth = 1081 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth; 1082 } 1083 } 1084 *monitor_info_count_ptr = owned_monitor_count; 1085 } 1086 1087 // clean up. 1088 for (int i = 0; i < owned_monitor_count; i++) { 1089 deallocate((unsigned char*)owned_monitors_list->at(i)); 1090 } 1091 delete owned_monitors_list; 1092 1093 return err; 1094} /* end GetOwnedMonitorStackDepthInfo */ 1095 1096 1097// Threads_lock NOT held, java_thread not protected by lock 1098// java_thread - pre-checked 1099// monitor_ptr - pre-checked for NULL 1100jvmtiError 1101JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) { 1102 jvmtiError err = JVMTI_ERROR_NONE; 1103 uint32_t debug_bits = 0; 1104 JavaThread* calling_thread = JavaThread::current(); 1105 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1106 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr); 1107 } else { 1108 // get contended monitor information at safepoint. 1109 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr); 1110 VMThread::execute(&op); 1111 err = op.result(); 1112 } 1113 return err; 1114} /* end GetCurrentContendedMonitor */ 1115 1116 1117// Threads_lock NOT held 1118// thread - NOT pre-checked 1119// proc - pre-checked for NULL 1120// arg - NULL is a valid value, must be checked 1121jvmtiError 1122JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) { 1123 oop thread_oop = JNIHandles::resolve_external_guard(thread); 1124 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) { 1125 return JVMTI_ERROR_INVALID_THREAD; 1126 } 1127 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) { 1128 return JVMTI_ERROR_INVALID_PRIORITY; 1129 } 1130 1131 //Thread-self 1132 JavaThread* current_thread = JavaThread::current(); 1133 1134 Handle thread_hndl(current_thread, thread_oop); 1135 { 1136 MutexLocker mu(Threads_lock); // grab Threads_lock 1137 1138 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg); 1139 1140 // At this point it may be possible that no osthread was created for the 1141 // JavaThread due to lack of memory. 1142 if (new_thread == NULL || new_thread->osthread() == NULL) { 1143 if (new_thread) delete new_thread; 1144 return JVMTI_ERROR_OUT_OF_MEMORY; 1145 } 1146 1147 java_lang_Thread::set_thread(thread_hndl(), new_thread); 1148 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority); 1149 java_lang_Thread::set_daemon(thread_hndl()); 1150 1151 new_thread->set_threadObj(thread_hndl()); 1152 Threads::add(new_thread); 1153 Thread::start(new_thread); 1154 } // unlock Threads_lock 1155 1156 return JVMTI_ERROR_NONE; 1157} /* end RunAgentThread */ 1158 1159 // 1160 // Thread Group functions 1161 // 1162 1163// group_count_ptr - pre-checked for NULL 1164// groups_ptr - pre-checked for NULL 1165jvmtiError 1166JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) { 1167 JavaThread* current_thread = JavaThread::current(); 1168 1169 // Only one top level thread group now. 1170 *group_count_ptr = 1; 1171 1172 // Allocate memory to store global-refs to the thread groups. 1173 // Assume this area is freed by caller. 1174 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr)); 1175 1176 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY); 1177 1178 // Convert oop to Handle, then convert Handle to global-ref. 1179 { 1180 HandleMark hm(current_thread); 1181 Handle system_thread_group(current_thread, Universe::system_thread_group()); 1182 *groups_ptr[0] = jni_reference(system_thread_group); 1183 } 1184 1185 return JVMTI_ERROR_NONE; 1186} /* end GetTopThreadGroups */ 1187 1188 1189// info_ptr - pre-checked for NULL 1190jvmtiError 1191JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) { 1192 ResourceMark rm; 1193 HandleMark hm; 1194 1195 JavaThread* current_thread = JavaThread::current(); 1196 1197 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group)); 1198 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP); 1199 1200 typeArrayHandle name; 1201 Handle parent_group; 1202 bool is_daemon; 1203 ThreadPriority max_priority; 1204 1205 { MutexLocker mu(Threads_lock); 1206 1207 name = typeArrayHandle(current_thread, 1208 java_lang_ThreadGroup::name(group_obj())); 1209 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj())); 1210 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj()); 1211 max_priority = java_lang_ThreadGroup::maxPriority(group_obj()); 1212 } 1213 1214 info_ptr->is_daemon = is_daemon; 1215 info_ptr->max_priority = max_priority; 1216 info_ptr->parent = jni_reference(parent_group); 1217 1218 if (name() != NULL) { 1219 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); 1220 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1); 1221 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY); 1222 strcpy(info_ptr->name, n); 1223 } else { 1224 info_ptr->name = NULL; 1225 } 1226 1227 return JVMTI_ERROR_NONE; 1228} /* end GetThreadGroupInfo */ 1229 1230 1231// thread_count_ptr - pre-checked for NULL 1232// threads_ptr - pre-checked for NULL 1233// group_count_ptr - pre-checked for NULL 1234// groups_ptr - pre-checked for NULL 1235jvmtiError 1236JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) { 1237 JavaThread* current_thread = JavaThread::current(); 1238 oop group_obj = (oop) JNIHandles::resolve_external_guard(group); 1239 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP); 1240 1241 Handle *thread_objs = NULL; 1242 Handle *group_objs = NULL; 1243 int nthreads = 0; 1244 int ngroups = 0; 1245 int hidden_threads = 0; 1246 1247 ResourceMark rm; 1248 HandleMark hm; 1249 1250 Handle group_hdl(current_thread, group_obj); 1251 1252 { MutexLocker mu(Threads_lock); 1253 1254 nthreads = java_lang_ThreadGroup::nthreads(group_hdl()); 1255 ngroups = java_lang_ThreadGroup::ngroups(group_hdl()); 1256 1257 if (nthreads > 0) { 1258 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl()); 1259 assert(nthreads <= threads->length(), "too many threads"); 1260 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads); 1261 for (int i=0, j=0; i<nthreads; i++) { 1262 oop thread_obj = threads->obj_at(i); 1263 assert(thread_obj != NULL, "thread_obj is NULL"); 1264 JavaThread *javathread = java_lang_Thread::thread(thread_obj); 1265 // Filter out hidden java threads. 1266 if (javathread != NULL && javathread->is_hidden_from_external_view()) { 1267 hidden_threads++; 1268 continue; 1269 } 1270 thread_objs[j++] = Handle(current_thread, thread_obj); 1271 } 1272 nthreads -= hidden_threads; 1273 } 1274 if (ngroups > 0) { 1275 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl()); 1276 assert(ngroups <= groups->length(), "too many threads"); 1277 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups); 1278 for (int i=0; i<ngroups; i++) { 1279 oop group_obj = groups->obj_at(i); 1280 assert(group_obj != NULL, "group_obj != NULL"); 1281 group_objs[i] = Handle(current_thread, group_obj); 1282 } 1283 } 1284 } 1285 1286 // have to make global handles outside of Threads_lock 1287 *group_count_ptr = ngroups; 1288 *thread_count_ptr = nthreads; 1289 *threads_ptr = new_jthreadArray(nthreads, thread_objs); 1290 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs); 1291 if ((nthreads > 0) && (*threads_ptr == NULL)) { 1292 return JVMTI_ERROR_OUT_OF_MEMORY; 1293 } 1294 if ((ngroups > 0) && (*groups_ptr == NULL)) { 1295 return JVMTI_ERROR_OUT_OF_MEMORY; 1296 } 1297 1298 return JVMTI_ERROR_NONE; 1299} /* end GetThreadGroupChildren */ 1300 1301 1302 // 1303 // Stack Frame functions 1304 // 1305 1306// Threads_lock NOT held, java_thread not protected by lock 1307// java_thread - pre-checked 1308// max_frame_count - pre-checked to be greater than or equal to 0 1309// frame_buffer - pre-checked for NULL 1310// count_ptr - pre-checked for NULL 1311jvmtiError 1312JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) { 1313 jvmtiError err = JVMTI_ERROR_NONE; 1314 uint32_t debug_bits = 0; 1315 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1316 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1317 } else { 1318 // JVMTI get stack trace at safepoint. Do not require target thread to 1319 // be suspended. 1320 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); 1321 VMThread::execute(&op); 1322 err = op.result(); 1323 } 1324 1325 return err; 1326} /* end GetStackTrace */ 1327 1328 1329// max_frame_count - pre-checked to be greater than or equal to 0 1330// stack_info_ptr - pre-checked for NULL 1331// thread_count_ptr - pre-checked for NULL 1332jvmtiError 1333JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) { 1334 jvmtiError err = JVMTI_ERROR_NONE; 1335 JavaThread* calling_thread = JavaThread::current(); 1336 1337 // JVMTI get stack traces at safepoint. 1338 VM_GetAllStackTraces op(this, calling_thread, max_frame_count); 1339 VMThread::execute(&op); 1340 *thread_count_ptr = op.final_thread_count(); 1341 *stack_info_ptr = op.stack_info(); 1342 err = op.result(); 1343 return err; 1344} /* end GetAllStackTraces */ 1345 1346 1347// thread_count - pre-checked to be greater than or equal to 0 1348// thread_list - pre-checked for NULL 1349// max_frame_count - pre-checked to be greater than or equal to 0 1350// stack_info_ptr - pre-checked for NULL 1351jvmtiError 1352JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) { 1353 jvmtiError err = JVMTI_ERROR_NONE; 1354 // JVMTI get stack traces at safepoint. 1355 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count); 1356 VMThread::execute(&op); 1357 err = op.result(); 1358 if (err == JVMTI_ERROR_NONE) { 1359 *stack_info_ptr = op.stack_info(); 1360 } 1361 return err; 1362} /* end GetThreadListStackTraces */ 1363 1364 1365// Threads_lock NOT held, java_thread not protected by lock 1366// java_thread - pre-checked 1367// count_ptr - pre-checked for NULL 1368jvmtiError 1369JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) { 1370 jvmtiError err = JVMTI_ERROR_NONE; 1371 1372 // retrieve or create JvmtiThreadState. 1373 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1374 if (state == NULL) { 1375 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1376 } 1377 uint32_t debug_bits = 0; 1378 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1379 err = get_frame_count(state, count_ptr); 1380 } else { 1381 // get java stack frame count at safepoint. 1382 VM_GetFrameCount op(this, state, count_ptr); 1383 VMThread::execute(&op); 1384 err = op.result(); 1385 } 1386 return err; 1387} /* end GetFrameCount */ 1388 1389 1390// Threads_lock NOT held, java_thread not protected by lock 1391// java_thread - pre-checked 1392jvmtiError 1393JvmtiEnv::PopFrame(JavaThread* java_thread) { 1394 JavaThread* current_thread = JavaThread::current(); 1395 HandleMark hm(current_thread); 1396 uint32_t debug_bits = 0; 1397 1398 // retrieve or create the state 1399 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); 1400 if (state == NULL) { 1401 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1402 } 1403 1404 // Check if java_thread is fully suspended 1405 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) { 1406 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1407 } 1408 // Check to see if a PopFrame was already in progress 1409 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) { 1410 // Probably possible for JVMTI clients to trigger this, but the 1411 // JPDA backend shouldn't allow this to happen 1412 return JVMTI_ERROR_INTERNAL; 1413 } 1414 1415 { 1416 // Was workaround bug 1417 // 4812902: popFrame hangs if the method is waiting at a synchronize 1418 // Catch this condition and return an error to avoid hanging. 1419 // Now JVMTI spec allows an implementation to bail out with an opaque frame error. 1420 OSThread* osThread = java_thread->osthread(); 1421 if (osThread->get_state() == MONITOR_WAIT) { 1422 return JVMTI_ERROR_OPAQUE_FRAME; 1423 } 1424 } 1425 1426 { 1427 ResourceMark rm(current_thread); 1428 // Check if there are more than one Java frame in this thread, that the top two frames 1429 // are Java (not native) frames, and that there is no intervening VM frame 1430 int frame_count = 0; 1431 bool is_interpreted[2]; 1432 intptr_t *frame_sp[2]; 1433 // The 2-nd arg of constructor is needed to stop iterating at java entry frame. 1434 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) { 1435 methodHandle mh(current_thread, vfs.method()); 1436 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME); 1437 is_interpreted[frame_count] = vfs.is_interpreted_frame(); 1438 frame_sp[frame_count] = vfs.frame_id(); 1439 if (++frame_count > 1) break; 1440 } 1441 if (frame_count < 2) { 1442 // We haven't found two adjacent non-native Java frames on the top. 1443 // There can be two situations here: 1444 // 1. There are no more java frames 1445 // 2. Two top java frames are separated by non-java native frames 1446 if(vframeFor(java_thread, 1) == NULL) { 1447 return JVMTI_ERROR_NO_MORE_FRAMES; 1448 } else { 1449 // Intervening non-java native or VM frames separate java frames. 1450 // Current implementation does not support this. See bug #5031735. 1451 // In theory it is possible to pop frames in such cases. 1452 return JVMTI_ERROR_OPAQUE_FRAME; 1453 } 1454 } 1455 1456 // If any of the top 2 frames is a compiled one, need to deoptimize it 1457 for (int i = 0; i < 2; i++) { 1458 if (!is_interpreted[i]) { 1459 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]); 1460 } 1461 } 1462 1463 // Update the thread state to reflect that the top frame is popped 1464 // so that cur_stack_depth is maintained properly and all frameIDs 1465 // are invalidated. 1466 // The current frame will be popped later when the suspended thread 1467 // is resumed and right before returning from VM to Java. 1468 // (see call_VM_base() in assembler_<cpu>.cpp). 1469 1470 // It's fine to update the thread state here because no JVMTI events 1471 // shall be posted for this PopFrame. 1472 1473 state->update_for_pop_top_frame(); 1474 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit); 1475 // Set pending step flag for this popframe and it is cleared when next 1476 // step event is posted. 1477 state->set_pending_step_for_popframe(); 1478 } 1479 1480 return JVMTI_ERROR_NONE; 1481} /* end PopFrame */ 1482 1483 1484// Threads_lock NOT held, java_thread not protected by lock 1485// java_thread - pre-checked 1486// java_thread - unchecked 1487// depth - pre-checked as non-negative 1488// method_ptr - pre-checked for NULL 1489// location_ptr - pre-checked for NULL 1490jvmtiError 1491JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) { 1492 jvmtiError err = JVMTI_ERROR_NONE; 1493 uint32_t debug_bits = 0; 1494 1495 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1496 err = get_frame_location(java_thread, depth, method_ptr, location_ptr); 1497 } else { 1498 // JVMTI get java stack frame location at safepoint. 1499 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr); 1500 VMThread::execute(&op); 1501 err = op.result(); 1502 } 1503 return err; 1504} /* end GetFrameLocation */ 1505 1506 1507// Threads_lock NOT held, java_thread not protected by lock 1508// java_thread - pre-checked 1509// java_thread - unchecked 1510// depth - pre-checked as non-negative 1511jvmtiError 1512JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) { 1513 ResourceMark rm; 1514 uint32_t debug_bits = 0; 1515 1516 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread); 1517 if (state == NULL) { 1518 return JVMTI_ERROR_THREAD_NOT_ALIVE; 1519 } 1520 1521 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) { 1522 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; 1523 } 1524 1525 if (TraceJVMTICalls) { 1526 JvmtiSuspendControl::print(); 1527 } 1528 1529 vframe *vf = vframeFor(java_thread, depth); 1530 if (vf == NULL) { 1531 return JVMTI_ERROR_NO_MORE_FRAMES; 1532 } 1533 1534 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) { 1535 return JVMTI_ERROR_OPAQUE_FRAME; 1536 } 1537 1538 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL"); 1539 1540 int frame_number = state->count_frames() - depth; 1541 state->env_thread_state(this)->set_frame_pop(frame_number); 1542 1543 return JVMTI_ERROR_NONE; 1544} /* end NotifyFramePop */ 1545 1546 1547 // 1548 // Force Early Return functions 1549 // 1550 1551// Threads_lock NOT held, java_thread not protected by lock 1552// java_thread - pre-checked 1553jvmtiError 1554JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) { 1555 jvalue val; 1556 val.l = value; 1557 return force_early_return(java_thread, val, atos); 1558} /* end ForceEarlyReturnObject */ 1559 1560 1561// Threads_lock NOT held, java_thread not protected by lock 1562// java_thread - pre-checked 1563jvmtiError 1564JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) { 1565 jvalue val; 1566 val.i = value; 1567 return force_early_return(java_thread, val, itos); 1568} /* end ForceEarlyReturnInt */ 1569 1570 1571// Threads_lock NOT held, java_thread not protected by lock 1572// java_thread - pre-checked 1573jvmtiError 1574JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) { 1575 jvalue val; 1576 val.j = value; 1577 return force_early_return(java_thread, val, ltos); 1578} /* end ForceEarlyReturnLong */ 1579 1580 1581// Threads_lock NOT held, java_thread not protected by lock 1582// java_thread - pre-checked 1583jvmtiError 1584JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) { 1585 jvalue val; 1586 val.f = value; 1587 return force_early_return(java_thread, val, ftos); 1588} /* end ForceEarlyReturnFloat */ 1589 1590 1591// Threads_lock NOT held, java_thread not protected by lock 1592// java_thread - pre-checked 1593jvmtiError 1594JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) { 1595 jvalue val; 1596 val.d = value; 1597 return force_early_return(java_thread, val, dtos); 1598} /* end ForceEarlyReturnDouble */ 1599 1600 1601// Threads_lock NOT held, java_thread not protected by lock 1602// java_thread - pre-checked 1603jvmtiError 1604JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) { 1605 jvalue val; 1606 val.j = 0L; 1607 return force_early_return(java_thread, val, vtos); 1608} /* end ForceEarlyReturnVoid */ 1609 1610 1611 // 1612 // Heap functions 1613 // 1614 1615// klass - NULL is a valid value, must be checked 1616// initial_object - NULL is a valid value, must be checked 1617// callbacks - pre-checked for NULL 1618// user_data - NULL is a valid value, must be checked 1619jvmtiError 1620JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1621 // check klass if provided 1622 Klass* k_oop = NULL; 1623 if (klass != NULL) { 1624 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1625 if (k_mirror == NULL) { 1626 return JVMTI_ERROR_INVALID_CLASS; 1627 } 1628 if (java_lang_Class::is_primitive(k_mirror)) { 1629 return JVMTI_ERROR_NONE; 1630 } 1631 k_oop = java_lang_Class::as_Klass(k_mirror); 1632 if (k_oop == NULL) { 1633 return JVMTI_ERROR_INVALID_CLASS; 1634 } 1635 } 1636 1637 Thread *thread = Thread::current(); 1638 HandleMark hm(thread); 1639 KlassHandle kh (thread, k_oop); 1640 1641 TraceTime t("FollowReferences", TraceJVMTIObjectTagging); 1642 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data); 1643 return JVMTI_ERROR_NONE; 1644} /* end FollowReferences */ 1645 1646 1647// klass - NULL is a valid value, must be checked 1648// callbacks - pre-checked for NULL 1649// user_data - NULL is a valid value, must be checked 1650jvmtiError 1651JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) { 1652 // check klass if provided 1653 Klass* k_oop = NULL; 1654 if (klass != NULL) { 1655 oop k_mirror = JNIHandles::resolve_external_guard(klass); 1656 if (k_mirror == NULL) { 1657 return JVMTI_ERROR_INVALID_CLASS; 1658 } 1659 if (java_lang_Class::is_primitive(k_mirror)) { 1660 return JVMTI_ERROR_NONE; 1661 } 1662 k_oop = java_lang_Class::as_Klass(k_mirror); 1663 if (k_oop == NULL) { 1664 return JVMTI_ERROR_INVALID_CLASS; 1665 } 1666 } 1667 1668 Thread *thread = Thread::current(); 1669 HandleMark hm(thread); 1670 KlassHandle kh (thread, k_oop); 1671 1672 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging); 1673 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data); 1674 return JVMTI_ERROR_NONE; 1675} /* end IterateThroughHeap */ 1676 1677 1678// tag_ptr - pre-checked for NULL 1679jvmtiError 1680JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) { 1681 oop o = JNIHandles::resolve_external_guard(object); 1682 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1683 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object); 1684 return JVMTI_ERROR_NONE; 1685} /* end GetTag */ 1686 1687 1688jvmtiError 1689JvmtiEnv::SetTag(jobject object, jlong tag) { 1690 oop o = JNIHandles::resolve_external_guard(object); 1691 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1692 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag); 1693 return JVMTI_ERROR_NONE; 1694} /* end SetTag */ 1695 1696 1697// tag_count - pre-checked to be greater than or equal to 0 1698// tags - pre-checked for NULL 1699// count_ptr - pre-checked for NULL 1700// object_result_ptr - NULL is a valid value, must be checked 1701// tag_result_ptr - NULL is a valid value, must be checked 1702jvmtiError 1703JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { 1704 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging); 1705 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr); 1706} /* end GetObjectsWithTags */ 1707 1708 1709jvmtiError 1710JvmtiEnv::ForceGarbageCollection() { 1711 Universe::heap()->collect(GCCause::_jvmti_force_gc); 1712 return JVMTI_ERROR_NONE; 1713} /* end ForceGarbageCollection */ 1714 1715 1716 // 1717 // Heap (1.0) functions 1718 // 1719 1720// object_reference_callback - pre-checked for NULL 1721// user_data - NULL is a valid value, must be checked 1722jvmtiError 1723JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) { 1724 oop o = JNIHandles::resolve_external_guard(object); 1725 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); 1726 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data); 1727 return JVMTI_ERROR_NONE; 1728} /* end IterateOverObjectsReachableFromObject */ 1729 1730 1731// heap_root_callback - NULL is a valid value, must be checked 1732// stack_ref_callback - NULL is a valid value, must be checked 1733// object_ref_callback - NULL is a valid value, must be checked 1734// user_data - NULL is a valid value, must be checked 1735jvmtiError 1736JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) { 1737 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging); 1738 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data); 1739 return JVMTI_ERROR_NONE; 1740} /* end IterateOverReachableObjects */ 1741 1742 1743// heap_object_callback - pre-checked for NULL 1744// user_data - NULL is a valid value, must be checked 1745jvmtiError 1746JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1747 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging); 1748 Thread *thread = Thread::current(); 1749 HandleMark hm(thread); 1750 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data); 1751 return JVMTI_ERROR_NONE; 1752} /* end IterateOverHeap */ 1753 1754 1755// k_mirror - may be primitive, this must be checked 1756// heap_object_callback - pre-checked for NULL 1757// user_data - NULL is a valid value, must be checked 1758jvmtiError 1759JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { 1760 if (java_lang_Class::is_primitive(k_mirror)) { 1761 // DO PRIMITIVE CLASS PROCESSING 1762 return JVMTI_ERROR_NONE; 1763 } 1764 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 1765 if (k_oop == NULL) { 1766 return JVMTI_ERROR_INVALID_CLASS; 1767 } 1768 Thread *thread = Thread::current(); 1769 HandleMark hm(thread); 1770 KlassHandle klass (thread, k_oop); 1771 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging); 1772 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data); 1773 return JVMTI_ERROR_NONE; 1774} /* end IterateOverInstancesOfClass */ 1775 1776 1777 // 1778 // Local Variable functions 1779 // 1780 1781// Threads_lock NOT held, java_thread not protected by lock 1782// java_thread - pre-checked 1783// java_thread - unchecked 1784// depth - pre-checked as non-negative 1785// value_ptr - pre-checked for NULL 1786jvmtiError 1787JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) { 1788 JavaThread* current_thread = JavaThread::current(); 1789 // rm object is created to clean up the javaVFrame created in 1790 // doit_prologue(), but after doit() is finished with it. 1791 ResourceMark rm(current_thread); 1792 1793 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot); 1794 VMThread::execute(&op); 1795 jvmtiError err = op.result(); 1796 if (err != JVMTI_ERROR_NONE) { 1797 return err; 1798 } else { 1799 *value_ptr = op.value().l; 1800 return JVMTI_ERROR_NONE; 1801 } 1802} /* end GetLocalObject */ 1803 1804// Threads_lock NOT held, java_thread not protected by lock 1805// java_thread - pre-checked 1806// java_thread - unchecked 1807// depth - pre-checked as non-negative 1808// value - pre-checked for NULL 1809jvmtiError 1810JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){ 1811 JavaThread* current_thread = JavaThread::current(); 1812 // rm object is created to clean up the javaVFrame created in 1813 // doit_prologue(), but after doit() is finished with it. 1814 ResourceMark rm(current_thread); 1815 1816 VM_GetReceiver op(java_thread, current_thread, depth); 1817 VMThread::execute(&op); 1818 jvmtiError err = op.result(); 1819 if (err != JVMTI_ERROR_NONE) { 1820 return err; 1821 } else { 1822 *value_ptr = op.value().l; 1823 return JVMTI_ERROR_NONE; 1824 } 1825} /* end GetLocalInstance */ 1826 1827 1828// Threads_lock NOT held, java_thread not protected by lock 1829// java_thread - pre-checked 1830// java_thread - unchecked 1831// depth - pre-checked as non-negative 1832// value_ptr - pre-checked for NULL 1833jvmtiError 1834JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) { 1835 // rm object is created to clean up the javaVFrame created in 1836 // doit_prologue(), but after doit() is finished with it. 1837 ResourceMark rm; 1838 1839 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT); 1840 VMThread::execute(&op); 1841 *value_ptr = op.value().i; 1842 return op.result(); 1843} /* end GetLocalInt */ 1844 1845 1846// Threads_lock NOT held, java_thread not protected by lock 1847// java_thread - pre-checked 1848// java_thread - unchecked 1849// depth - pre-checked as non-negative 1850// value_ptr - pre-checked for NULL 1851jvmtiError 1852JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) { 1853 // rm object is created to clean up the javaVFrame created in 1854 // doit_prologue(), but after doit() is finished with it. 1855 ResourceMark rm; 1856 1857 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG); 1858 VMThread::execute(&op); 1859 *value_ptr = op.value().j; 1860 return op.result(); 1861} /* end GetLocalLong */ 1862 1863 1864// Threads_lock NOT held, java_thread not protected by lock 1865// java_thread - pre-checked 1866// java_thread - unchecked 1867// depth - pre-checked as non-negative 1868// value_ptr - pre-checked for NULL 1869jvmtiError 1870JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) { 1871 // rm object is created to clean up the javaVFrame created in 1872 // doit_prologue(), but after doit() is finished with it. 1873 ResourceMark rm; 1874 1875 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT); 1876 VMThread::execute(&op); 1877 *value_ptr = op.value().f; 1878 return op.result(); 1879} /* end GetLocalFloat */ 1880 1881 1882// Threads_lock NOT held, java_thread not protected by lock 1883// java_thread - pre-checked 1884// java_thread - unchecked 1885// depth - pre-checked as non-negative 1886// value_ptr - pre-checked for NULL 1887jvmtiError 1888JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) { 1889 // rm object is created to clean up the javaVFrame created in 1890 // doit_prologue(), but after doit() is finished with it. 1891 ResourceMark rm; 1892 1893 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE); 1894 VMThread::execute(&op); 1895 *value_ptr = op.value().d; 1896 return op.result(); 1897} /* end GetLocalDouble */ 1898 1899 1900// Threads_lock NOT held, java_thread not protected by lock 1901// java_thread - pre-checked 1902// java_thread - unchecked 1903// depth - pre-checked as non-negative 1904jvmtiError 1905JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) { 1906 // rm object is created to clean up the javaVFrame created in 1907 // doit_prologue(), but after doit() is finished with it. 1908 ResourceMark rm; 1909 jvalue val; 1910 val.l = value; 1911 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val); 1912 VMThread::execute(&op); 1913 return op.result(); 1914} /* end SetLocalObject */ 1915 1916 1917// Threads_lock NOT held, java_thread not protected by lock 1918// java_thread - pre-checked 1919// java_thread - unchecked 1920// depth - pre-checked as non-negative 1921jvmtiError 1922JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) { 1923 // rm object is created to clean up the javaVFrame created in 1924 // doit_prologue(), but after doit() is finished with it. 1925 ResourceMark rm; 1926 jvalue val; 1927 val.i = value; 1928 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val); 1929 VMThread::execute(&op); 1930 return op.result(); 1931} /* end SetLocalInt */ 1932 1933 1934// Threads_lock NOT held, java_thread not protected by lock 1935// java_thread - pre-checked 1936// java_thread - unchecked 1937// depth - pre-checked as non-negative 1938jvmtiError 1939JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) { 1940 // rm object is created to clean up the javaVFrame created in 1941 // doit_prologue(), but after doit() is finished with it. 1942 ResourceMark rm; 1943 jvalue val; 1944 val.j = value; 1945 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val); 1946 VMThread::execute(&op); 1947 return op.result(); 1948} /* end SetLocalLong */ 1949 1950 1951// Threads_lock NOT held, java_thread not protected by lock 1952// java_thread - pre-checked 1953// java_thread - unchecked 1954// depth - pre-checked as non-negative 1955jvmtiError 1956JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) { 1957 // rm object is created to clean up the javaVFrame created in 1958 // doit_prologue(), but after doit() is finished with it. 1959 ResourceMark rm; 1960 jvalue val; 1961 val.f = value; 1962 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val); 1963 VMThread::execute(&op); 1964 return op.result(); 1965} /* end SetLocalFloat */ 1966 1967 1968// Threads_lock NOT held, java_thread not protected by lock 1969// java_thread - pre-checked 1970// java_thread - unchecked 1971// depth - pre-checked as non-negative 1972jvmtiError 1973JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) { 1974 // rm object is created to clean up the javaVFrame created in 1975 // doit_prologue(), but after doit() is finished with it. 1976 ResourceMark rm; 1977 jvalue val; 1978 val.d = value; 1979 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val); 1980 VMThread::execute(&op); 1981 return op.result(); 1982} /* end SetLocalDouble */ 1983 1984 1985 // 1986 // Breakpoint functions 1987 // 1988 1989// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 1990jvmtiError 1991JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) { 1992 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 1993 if (location < 0) { // simple invalid location check first 1994 return JVMTI_ERROR_INVALID_LOCATION; 1995 } 1996 // verify that the breakpoint is not past the end of the method 1997 if (location >= (jlocation) method_oop->code_size()) { 1998 return JVMTI_ERROR_INVALID_LOCATION; 1999 } 2000 2001 ResourceMark rm; 2002 JvmtiBreakpoint bp(method_oop, location); 2003 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2004 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE) 2005 return JVMTI_ERROR_DUPLICATE; 2006 2007 if (TraceJVMTICalls) { 2008 jvmti_breakpoints.print(); 2009 } 2010 2011 return JVMTI_ERROR_NONE; 2012} /* end SetBreakpoint */ 2013 2014 2015// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2016jvmtiError 2017JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) { 2018 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2019 2020 if (location < 0) { // simple invalid location check first 2021 return JVMTI_ERROR_INVALID_LOCATION; 2022 } 2023 2024 // verify that the breakpoint is not past the end of the method 2025 if (location >= (jlocation) method_oop->code_size()) { 2026 return JVMTI_ERROR_INVALID_LOCATION; 2027 } 2028 2029 JvmtiBreakpoint bp(method_oop, location); 2030 2031 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); 2032 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND) 2033 return JVMTI_ERROR_NOT_FOUND; 2034 2035 if (TraceJVMTICalls) { 2036 jvmti_breakpoints.print(); 2037 } 2038 2039 return JVMTI_ERROR_NONE; 2040} /* end ClearBreakpoint */ 2041 2042 2043 // 2044 // Watched Field functions 2045 // 2046 2047jvmtiError 2048JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2049 // make sure we haven't set this watch before 2050 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE; 2051 fdesc_ptr->set_is_field_access_watched(true); 2052 2053 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true); 2054 2055 return JVMTI_ERROR_NONE; 2056} /* end SetFieldAccessWatch */ 2057 2058 2059jvmtiError 2060JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) { 2061 // make sure we have a watch to clear 2062 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND; 2063 fdesc_ptr->set_is_field_access_watched(false); 2064 2065 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false); 2066 2067 return JVMTI_ERROR_NONE; 2068} /* end ClearFieldAccessWatch */ 2069 2070 2071jvmtiError 2072JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2073 // make sure we haven't set this watch before 2074 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE; 2075 fdesc_ptr->set_is_field_modification_watched(true); 2076 2077 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true); 2078 2079 return JVMTI_ERROR_NONE; 2080} /* end SetFieldModificationWatch */ 2081 2082 2083jvmtiError 2084JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) { 2085 // make sure we have a watch to clear 2086 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND; 2087 fdesc_ptr->set_is_field_modification_watched(false); 2088 2089 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false); 2090 2091 return JVMTI_ERROR_NONE; 2092} /* end ClearFieldModificationWatch */ 2093 2094 // 2095 // Class functions 2096 // 2097 2098 2099// k_mirror - may be primitive, this must be checked 2100// signature_ptr - NULL is a valid value, must be checked 2101// generic_ptr - NULL is a valid value, must be checked 2102jvmtiError 2103JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) { 2104 ResourceMark rm; 2105 bool isPrimitive = java_lang_Class::is_primitive(k_mirror); 2106 Klass* k = NULL; 2107 if (!isPrimitive) { 2108 k = java_lang_Class::as_Klass(k_mirror); 2109 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2110 } 2111 if (signature_ptr != NULL) { 2112 char* result = NULL; 2113 if (isPrimitive) { 2114 char tchar = type2char(java_lang_Class::primitive_type(k_mirror)); 2115 result = (char*) jvmtiMalloc(2); 2116 result[0] = tchar; 2117 result[1] = '\0'; 2118 } else { 2119 const char* class_sig = Klass::cast(k)->signature_name(); 2120 result = (char *) jvmtiMalloc(strlen(class_sig)+1); 2121 strcpy(result, class_sig); 2122 } 2123 *signature_ptr = result; 2124 } 2125 if (generic_ptr != NULL) { 2126 *generic_ptr = NULL; 2127 if (!isPrimitive && Klass::cast(k)->oop_is_instance()) { 2128 Symbol* soo = InstanceKlass::cast(k)->generic_signature(); 2129 if (soo != NULL) { 2130 const char *gen_sig = soo->as_C_string(); 2131 if (gen_sig != NULL) { 2132 char* gen_result; 2133 jvmtiError err = allocate(strlen(gen_sig) + 1, 2134 (unsigned char **)&gen_result); 2135 if (err != JVMTI_ERROR_NONE) { 2136 return err; 2137 } 2138 strcpy(gen_result, gen_sig); 2139 *generic_ptr = gen_result; 2140 } 2141 } 2142 } 2143 } 2144 return JVMTI_ERROR_NONE; 2145} /* end GetClassSignature */ 2146 2147 2148// k_mirror - may be primitive, this must be checked 2149// status_ptr - pre-checked for NULL 2150jvmtiError 2151JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) { 2152 jint result = 0; 2153 if (java_lang_Class::is_primitive(k_mirror)) { 2154 result |= JVMTI_CLASS_STATUS_PRIMITIVE; 2155 } else { 2156 Klass* k = java_lang_Class::as_Klass(k_mirror); 2157 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2158 result = Klass::cast(k)->jvmti_class_status(); 2159 } 2160 *status_ptr = result; 2161 2162 return JVMTI_ERROR_NONE; 2163} /* end GetClassStatus */ 2164 2165 2166// k_mirror - may be primitive, this must be checked 2167// source_name_ptr - pre-checked for NULL 2168jvmtiError 2169JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) { 2170 if (java_lang_Class::is_primitive(k_mirror)) { 2171 return JVMTI_ERROR_ABSENT_INFORMATION; 2172 } 2173 Klass* k_klass = java_lang_Class::as_Klass(k_mirror); 2174 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS); 2175 2176 if (!Klass::cast(k_klass)->oop_is_instance()) { 2177 return JVMTI_ERROR_ABSENT_INFORMATION; 2178 } 2179 2180 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name(); 2181 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION); 2182 { 2183 JavaThread* current_thread = JavaThread::current(); 2184 ResourceMark rm(current_thread); 2185 const char* sfncp = (const char*) sfnOop->as_C_string(); 2186 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1); 2187 strcpy(*source_name_ptr, sfncp); 2188 } 2189 2190 return JVMTI_ERROR_NONE; 2191} /* end GetSourceFileName */ 2192 2193 2194// k_mirror - may be primitive, this must be checked 2195// modifiers_ptr - pre-checked for NULL 2196jvmtiError 2197JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) { 2198 JavaThread* current_thread = JavaThread::current(); 2199 jint result = 0; 2200 if (!java_lang_Class::is_primitive(k_mirror)) { 2201 Klass* k = java_lang_Class::as_Klass(k_mirror); 2202 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2203 result = Klass::cast(k)->compute_modifier_flags(current_thread); 2204 JavaThread* THREAD = current_thread; // pass to macros 2205 if (HAS_PENDING_EXCEPTION) { 2206 CLEAR_PENDING_EXCEPTION; 2207 return JVMTI_ERROR_INTERNAL; 2208 }; 2209 2210 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()). 2211 if(Klass::cast(k)->is_super()) { 2212 result |= JVM_ACC_SUPER; 2213 } 2214 } else { 2215 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 2216 } 2217 *modifiers_ptr = result; 2218 2219 return JVMTI_ERROR_NONE; 2220} /* end GetClassModifiers */ 2221 2222 2223// k_mirror - may be primitive, this must be checked 2224// method_count_ptr - pre-checked for NULL 2225// methods_ptr - pre-checked for NULL 2226jvmtiError 2227JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) { 2228 JavaThread* current_thread = JavaThread::current(); 2229 HandleMark hm(current_thread); 2230 2231 if (java_lang_Class::is_primitive(k_mirror)) { 2232 *method_count_ptr = 0; 2233 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2234 return JVMTI_ERROR_NONE; 2235 } 2236 Klass* k = java_lang_Class::as_Klass(k_mirror); 2237 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2238 2239 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2240 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2241 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2242 } 2243 2244 if (!Klass::cast(k)->oop_is_instance()) { 2245 *method_count_ptr = 0; 2246 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); 2247 return JVMTI_ERROR_NONE; 2248 } 2249 instanceKlassHandle instanceK_h(current_thread, k); 2250 // Allocate the result and fill it in 2251 int result_length = instanceK_h->methods()->length(); 2252 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID)); 2253 int index; 2254 if (JvmtiExport::can_maintain_original_method_order()) { 2255 // Use the original method ordering indices stored in the class, so we can emit 2256 // jmethodIDs in the order they appeared in the class file 2257 for (index = 0; index < result_length; index++) { 2258 Method* m = instanceK_h->methods()->at(index); 2259 int original_index = instanceK_h->method_ordering()->at(index); 2260 assert(original_index >= 0 && original_index < result_length, "invalid original method index"); 2261 jmethodID id = m->jmethod_id(); 2262 result_list[original_index] = id; 2263 } 2264 } else { 2265 // otherwise just copy in any order 2266 for (index = 0; index < result_length; index++) { 2267 Method* m = instanceK_h->methods()->at(index); 2268 jmethodID id = m->jmethod_id(); 2269 result_list[index] = id; 2270 } 2271 } 2272 // Fill in return value. 2273 *method_count_ptr = result_length; 2274 *methods_ptr = result_list; 2275 2276 return JVMTI_ERROR_NONE; 2277} /* end GetClassMethods */ 2278 2279 2280// k_mirror - may be primitive, this must be checked 2281// field_count_ptr - pre-checked for NULL 2282// fields_ptr - pre-checked for NULL 2283jvmtiError 2284JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) { 2285 if (java_lang_Class::is_primitive(k_mirror)) { 2286 *field_count_ptr = 0; 2287 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2288 return JVMTI_ERROR_NONE; 2289 } 2290 JavaThread* current_thread = JavaThread::current(); 2291 HandleMark hm(current_thread); 2292 Klass* k = java_lang_Class::as_Klass(k_mirror); 2293 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2294 2295 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2296 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { 2297 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2298 } 2299 2300 if (!Klass::cast(k)->oop_is_instance()) { 2301 *field_count_ptr = 0; 2302 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); 2303 return JVMTI_ERROR_NONE; 2304 } 2305 2306 2307 instanceKlassHandle instanceK_h(current_thread, k); 2308 2309 int result_count = 0; 2310 // First, count the fields. 2311 FilteredFieldStream flds(instanceK_h, true, true); 2312 result_count = flds.field_count(); 2313 2314 // Allocate the result and fill it in 2315 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID)); 2316 // The JVMTI spec requires fields in the order they occur in the class file, 2317 // this is the reverse order of what FieldStream hands out. 2318 int id_index = (result_count - 1); 2319 2320 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) { 2321 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID( 2322 instanceK_h, src_st.offset(), 2323 src_st.access_flags().is_static()); 2324 } 2325 assert(id_index == -1, "just checking"); 2326 // Fill in the results 2327 *field_count_ptr = result_count; 2328 *fields_ptr = result_list; 2329 2330 return JVMTI_ERROR_NONE; 2331} /* end GetClassFields */ 2332 2333 2334// k_mirror - may be primitive, this must be checked 2335// interface_count_ptr - pre-checked for NULL 2336// interfaces_ptr - pre-checked for NULL 2337jvmtiError 2338JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) { 2339 { 2340 if (java_lang_Class::is_primitive(k_mirror)) { 2341 *interface_count_ptr = 0; 2342 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2343 return JVMTI_ERROR_NONE; 2344 } 2345 JavaThread* current_thread = JavaThread::current(); 2346 HandleMark hm(current_thread); 2347 Klass* k = java_lang_Class::as_Klass(k_mirror); 2348 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2349 2350 // Return CLASS_NOT_PREPARED error as per JVMTI spec. 2351 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) 2352 return JVMTI_ERROR_CLASS_NOT_PREPARED; 2353 2354 if (!Klass::cast(k)->oop_is_instance()) { 2355 *interface_count_ptr = 0; 2356 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); 2357 return JVMTI_ERROR_NONE; 2358 } 2359 2360 Array<Klass*>* interface_list = InstanceKlass::cast(k)->local_interfaces(); 2361 const int result_length = (interface_list == NULL ? 0 : interface_list->length()); 2362 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass)); 2363 for (int i_index = 0; i_index < result_length; i_index += 1) { 2364 Klass* klass_at = interface_list->at(i_index); 2365 assert(klass_at->is_klass(), "interfaces must be Klass*s"); 2366 assert(Klass::cast(klass_at)->is_interface(), "interfaces must be interfaces"); 2367 oop mirror_at = Klass::cast(klass_at)->java_mirror(); 2368 Handle handle_at = Handle(current_thread, mirror_at); 2369 result_list[i_index] = (jclass) jni_reference(handle_at); 2370 } 2371 *interface_count_ptr = result_length; 2372 *interfaces_ptr = result_list; 2373 } 2374 2375 return JVMTI_ERROR_NONE; 2376} /* end GetImplementedInterfaces */ 2377 2378 2379// k_mirror - may be primitive, this must be checked 2380// minor_version_ptr - pre-checked for NULL 2381// major_version_ptr - pre-checked for NULL 2382jvmtiError 2383JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) { 2384 if (java_lang_Class::is_primitive(k_mirror)) { 2385 return JVMTI_ERROR_ABSENT_INFORMATION; 2386 } 2387 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 2388 Thread *thread = Thread::current(); 2389 HandleMark hm(thread); 2390 KlassHandle klass(thread, k_oop); 2391 2392 jint status = klass->jvmti_class_status(); 2393 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2394 return JVMTI_ERROR_INVALID_CLASS; 2395 } 2396 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2397 return JVMTI_ERROR_ABSENT_INFORMATION; 2398 } 2399 2400 instanceKlassHandle ik(thread, k_oop); 2401 *minor_version_ptr = ik->minor_version(); 2402 *major_version_ptr = ik->major_version(); 2403 2404 return JVMTI_ERROR_NONE; 2405} /* end GetClassVersionNumbers */ 2406 2407 2408// k_mirror - may be primitive, this must be checked 2409// constant_pool_count_ptr - pre-checked for NULL 2410// constant_pool_byte_count_ptr - pre-checked for NULL 2411// constant_pool_bytes_ptr - pre-checked for NULL 2412jvmtiError 2413JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) { 2414 if (java_lang_Class::is_primitive(k_mirror)) { 2415 return JVMTI_ERROR_ABSENT_INFORMATION; 2416 } 2417 2418 Klass* k_oop = java_lang_Class::as_Klass(k_mirror); 2419 Thread *thread = Thread::current(); 2420 HandleMark hm(thread); 2421 ResourceMark rm(thread); 2422 KlassHandle klass(thread, k_oop); 2423 2424 jint status = klass->jvmti_class_status(); 2425 if (status & (JVMTI_CLASS_STATUS_ERROR)) { 2426 return JVMTI_ERROR_INVALID_CLASS; 2427 } 2428 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { 2429 return JVMTI_ERROR_ABSENT_INFORMATION; 2430 } 2431 2432 instanceKlassHandle ikh(thread, k_oop); 2433 constantPoolHandle constants(thread, ikh->constants()); 2434 MonitorLockerEx ml(constants->lock()); // lock constant pool while we query it 2435 2436 JvmtiConstantPoolReconstituter reconstituter(ikh); 2437 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2438 return reconstituter.get_error(); 2439 } 2440 2441 unsigned char *cpool_bytes; 2442 int cpool_size = reconstituter.cpool_size(); 2443 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2444 return reconstituter.get_error(); 2445 } 2446 jvmtiError res = allocate(cpool_size, &cpool_bytes); 2447 if (res != JVMTI_ERROR_NONE) { 2448 return res; 2449 } 2450 reconstituter.copy_cpool_bytes(cpool_bytes); 2451 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { 2452 return reconstituter.get_error(); 2453 } 2454 2455 *constant_pool_count_ptr = constants->length(); 2456 *constant_pool_byte_count_ptr = cpool_size; 2457 *constant_pool_bytes_ptr = cpool_bytes; 2458 2459 return JVMTI_ERROR_NONE; 2460} /* end GetConstantPool */ 2461 2462 2463// k_mirror - may be primitive, this must be checked 2464// is_interface_ptr - pre-checked for NULL 2465jvmtiError 2466JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) { 2467 { 2468 bool result = false; 2469 if (!java_lang_Class::is_primitive(k_mirror)) { 2470 Klass* k = java_lang_Class::as_Klass(k_mirror); 2471 if (k != NULL && Klass::cast(k)->is_interface()) { 2472 result = true; 2473 } 2474 } 2475 *is_interface_ptr = result; 2476 } 2477 2478 return JVMTI_ERROR_NONE; 2479} /* end IsInterface */ 2480 2481 2482// k_mirror - may be primitive, this must be checked 2483// is_array_class_ptr - pre-checked for NULL 2484jvmtiError 2485JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) { 2486 { 2487 bool result = false; 2488 if (!java_lang_Class::is_primitive(k_mirror)) { 2489 Klass* k = java_lang_Class::as_Klass(k_mirror); 2490 if (k != NULL && Klass::cast(k)->oop_is_array()) { 2491 result = true; 2492 } 2493 } 2494 *is_array_class_ptr = result; 2495 } 2496 2497 return JVMTI_ERROR_NONE; 2498} /* end IsArrayClass */ 2499 2500 2501// k_mirror - may be primitive, this must be checked 2502// classloader_ptr - pre-checked for NULL 2503jvmtiError 2504JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) { 2505 { 2506 if (java_lang_Class::is_primitive(k_mirror)) { 2507 *classloader_ptr = (jclass) jni_reference(Handle()); 2508 return JVMTI_ERROR_NONE; 2509 } 2510 JavaThread* current_thread = JavaThread::current(); 2511 HandleMark hm(current_thread); 2512 Klass* k = java_lang_Class::as_Klass(k_mirror); 2513 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2514 2515 oop result_oop = Klass::cast(k)->class_loader(); 2516 if (result_oop == NULL) { 2517 *classloader_ptr = (jclass) jni_reference(Handle()); 2518 return JVMTI_ERROR_NONE; 2519 } 2520 Handle result_handle = Handle(current_thread, result_oop); 2521 jclass result_jnihandle = (jclass) jni_reference(result_handle); 2522 *classloader_ptr = result_jnihandle; 2523 } 2524 return JVMTI_ERROR_NONE; 2525} /* end GetClassLoader */ 2526 2527 2528// k_mirror - may be primitive, this must be checked 2529// source_debug_extension_ptr - pre-checked for NULL 2530jvmtiError 2531JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) { 2532 { 2533 if (java_lang_Class::is_primitive(k_mirror)) { 2534 return JVMTI_ERROR_ABSENT_INFORMATION; 2535 } 2536 Klass* k = java_lang_Class::as_Klass(k_mirror); 2537 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); 2538 if (!Klass::cast(k)->oop_is_instance()) { 2539 return JVMTI_ERROR_ABSENT_INFORMATION; 2540 } 2541 char* sde = InstanceKlass::cast(k)->source_debug_extension(); 2542 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION); 2543 2544 { 2545 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1); 2546 strcpy(*source_debug_extension_ptr, sde); 2547 } 2548 } 2549 2550 return JVMTI_ERROR_NONE; 2551} /* end GetSourceDebugExtension */ 2552 2553 // 2554 // Object functions 2555 // 2556 2557// hash_code_ptr - pre-checked for NULL 2558jvmtiError 2559JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) { 2560 oop mirror = JNIHandles::resolve_external_guard(object); 2561 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); 2562 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER); 2563 2564 { 2565 jint result = (jint) mirror->identity_hash(); 2566 *hash_code_ptr = result; 2567 } 2568 return JVMTI_ERROR_NONE; 2569} /* end GetObjectHashCode */ 2570 2571 2572// info_ptr - pre-checked for NULL 2573jvmtiError 2574JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) { 2575 JavaThread* calling_thread = JavaThread::current(); 2576 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr); 2577 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) { 2578 // Some of the critical threads were not suspended. go to a safepoint and try again 2579 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr); 2580 VMThread::execute(&op); 2581 err = op.result(); 2582 } 2583 return err; 2584} /* end GetObjectMonitorUsage */ 2585 2586 2587 // 2588 // Field functions 2589 // 2590 2591// name_ptr - NULL is a valid value, must be checked 2592// signature_ptr - NULL is a valid value, must be checked 2593// generic_ptr - NULL is a valid value, must be checked 2594jvmtiError 2595JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2596 JavaThread* current_thread = JavaThread::current(); 2597 ResourceMark rm(current_thread); 2598 if (name_ptr == NULL) { 2599 // just don't return the name 2600 } else { 2601 const char* fieldName = fdesc_ptr->name()->as_C_string(); 2602 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1); 2603 if (*name_ptr == NULL) 2604 return JVMTI_ERROR_OUT_OF_MEMORY; 2605 strcpy(*name_ptr, fieldName); 2606 } 2607 if (signature_ptr== NULL) { 2608 // just don't return the signature 2609 } else { 2610 const char* fieldSignature = fdesc_ptr->signature()->as_C_string(); 2611 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1); 2612 if (*signature_ptr == NULL) 2613 return JVMTI_ERROR_OUT_OF_MEMORY; 2614 strcpy(*signature_ptr, fieldSignature); 2615 } 2616 if (generic_ptr != NULL) { 2617 *generic_ptr = NULL; 2618 Symbol* soop = fdesc_ptr->generic_signature(); 2619 if (soop != NULL) { 2620 const char* gen_sig = soop->as_C_string(); 2621 if (gen_sig != NULL) { 2622 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2623 if (err != JVMTI_ERROR_NONE) { 2624 return err; 2625 } 2626 strcpy(*generic_ptr, gen_sig); 2627 } 2628 } 2629 } 2630 return JVMTI_ERROR_NONE; 2631} /* end GetFieldName */ 2632 2633 2634// declaring_class_ptr - pre-checked for NULL 2635jvmtiError 2636JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) { 2637 2638 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder()); 2639 return JVMTI_ERROR_NONE; 2640} /* end GetFieldDeclaringClass */ 2641 2642 2643// modifiers_ptr - pre-checked for NULL 2644jvmtiError 2645JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) { 2646 2647 AccessFlags resultFlags = fdesc_ptr->access_flags(); 2648 jint result = resultFlags.as_int(); 2649 *modifiers_ptr = result; 2650 2651 return JVMTI_ERROR_NONE; 2652} /* end GetFieldModifiers */ 2653 2654 2655// is_synthetic_ptr - pre-checked for NULL 2656jvmtiError 2657JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) { 2658 *is_synthetic_ptr = fdesc_ptr->is_synthetic(); 2659 return JVMTI_ERROR_NONE; 2660} /* end IsFieldSynthetic */ 2661 2662 2663 // 2664 // Method functions 2665 // 2666 2667// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2668// name_ptr - NULL is a valid value, must be checked 2669// signature_ptr - NULL is a valid value, must be checked 2670// generic_ptr - NULL is a valid value, must be checked 2671jvmtiError 2672JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) { 2673 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2674 JavaThread* current_thread = JavaThread::current(); 2675 2676 ResourceMark rm(current_thread); // get the utf8 name and signature 2677 if (name_ptr == NULL) { 2678 // just don't return the name 2679 } else { 2680 const char* utf8_name = (const char *) method_oop->name()->as_utf8(); 2681 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1); 2682 strcpy(*name_ptr, utf8_name); 2683 } 2684 if (signature_ptr == NULL) { 2685 // just don't return the signature 2686 } else { 2687 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8(); 2688 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1); 2689 strcpy(*signature_ptr, utf8_signature); 2690 } 2691 2692 if (generic_ptr != NULL) { 2693 *generic_ptr = NULL; 2694 Symbol* soop = method_oop->generic_signature(); 2695 if (soop != NULL) { 2696 const char* gen_sig = soop->as_C_string(); 2697 if (gen_sig != NULL) { 2698 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); 2699 if (err != JVMTI_ERROR_NONE) { 2700 return err; 2701 } 2702 strcpy(*generic_ptr, gen_sig); 2703 } 2704 } 2705 } 2706 return JVMTI_ERROR_NONE; 2707} /* end GetMethodName */ 2708 2709 2710// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2711// declaring_class_ptr - pre-checked for NULL 2712jvmtiError 2713JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) { 2714 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2715 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder()); 2716 return JVMTI_ERROR_NONE; 2717} /* end GetMethodDeclaringClass */ 2718 2719 2720// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2721// modifiers_ptr - pre-checked for NULL 2722jvmtiError 2723JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) { 2724 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2725 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2726 return JVMTI_ERROR_NONE; 2727} /* end GetMethodModifiers */ 2728 2729 2730// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2731// max_ptr - pre-checked for NULL 2732jvmtiError 2733JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) { 2734 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2735 // get max stack 2736 (*max_ptr) = method_oop->max_locals(); 2737 return JVMTI_ERROR_NONE; 2738} /* end GetMaxLocals */ 2739 2740 2741// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2742// size_ptr - pre-checked for NULL 2743jvmtiError 2744JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) { 2745 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2746 // get size of arguments 2747 2748 (*size_ptr) = method_oop->size_of_parameters(); 2749 return JVMTI_ERROR_NONE; 2750} /* end GetArgumentsSize */ 2751 2752 2753// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2754// entry_count_ptr - pre-checked for NULL 2755// table_ptr - pre-checked for NULL 2756jvmtiError 2757JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) { 2758 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2759 if (!method_oop->has_linenumber_table()) { 2760 return (JVMTI_ERROR_ABSENT_INFORMATION); 2761 } 2762 2763 // The line number table is compressed so we don't know how big it is until decompressed. 2764 // Decompression is really fast so we just do it twice. 2765 2766 // Compute size of table 2767 jint num_entries = 0; 2768 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 2769 while (stream.read_pair()) { 2770 num_entries++; 2771 } 2772 jvmtiLineNumberEntry *jvmti_table = 2773 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry))); 2774 2775 // Fill jvmti table 2776 if (num_entries > 0) { 2777 int index = 0; 2778 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); 2779 while (stream.read_pair()) { 2780 jvmti_table[index].start_location = (jlocation) stream.bci(); 2781 jvmti_table[index].line_number = (jint) stream.line(); 2782 index++; 2783 } 2784 assert(index == num_entries, "sanity check"); 2785 } 2786 2787 // Set up results 2788 (*entry_count_ptr) = num_entries; 2789 (*table_ptr) = jvmti_table; 2790 2791 return JVMTI_ERROR_NONE; 2792} /* end GetLineNumberTable */ 2793 2794 2795// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2796// start_location_ptr - pre-checked for NULL 2797// end_location_ptr - pre-checked for NULL 2798jvmtiError 2799JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) { 2800 2801 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2802 // get start and end location 2803 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1); 2804 if (method_oop->code_size() == 0) { 2805 // there is no code so there is no start location 2806 (*start_location_ptr) = (jlocation)(-1); 2807 } else { 2808 (*start_location_ptr) = (jlocation)(0); 2809 } 2810 2811 return JVMTI_ERROR_NONE; 2812} /* end GetMethodLocation */ 2813 2814 2815// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2816// entry_count_ptr - pre-checked for NULL 2817// table_ptr - pre-checked for NULL 2818jvmtiError 2819JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) { 2820 2821 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2822 JavaThread* current_thread = JavaThread::current(); 2823 2824 // does the klass have any local variable information? 2825 InstanceKlass* ik = InstanceKlass::cast(method_oop->method_holder()); 2826 if (!ik->access_flags().has_localvariable_table()) { 2827 return (JVMTI_ERROR_ABSENT_INFORMATION); 2828 } 2829 2830 ConstantPool* constants = method_oop->constants(); 2831 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION); 2832 2833 // in the vm localvariable table representation, 6 consecutive elements in the table 2834 // represent a 6-tuple of shorts 2835 // [start_pc, length, name_index, descriptor_index, signature_index, index] 2836 jint num_entries = method_oop->localvariable_table_length(); 2837 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *) 2838 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry))); 2839 2840 if (num_entries > 0) { 2841 LocalVariableTableElement* table = method_oop->localvariable_table_start(); 2842 for (int i = 0; i < num_entries; i++) { 2843 // get the 5 tuple information from the vm table 2844 jlocation start_location = (jlocation) table[i].start_bci; 2845 jint length = (jint) table[i].length; 2846 int name_index = (int) table[i].name_cp_index; 2847 int signature_index = (int) table[i].descriptor_cp_index; 2848 int generic_signature_index = (int) table[i].signature_cp_index; 2849 jint slot = (jint) table[i].slot; 2850 2851 // get utf8 name and signature 2852 char *name_buf = NULL; 2853 char *sig_buf = NULL; 2854 char *gen_sig_buf = NULL; 2855 { 2856 ResourceMark rm(current_thread); 2857 2858 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8(); 2859 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1); 2860 strcpy(name_buf, utf8_name); 2861 2862 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8(); 2863 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1); 2864 strcpy(sig_buf, utf8_signature); 2865 2866 if (generic_signature_index > 0) { 2867 const char *utf8_gen_sign = (const char *) 2868 constants->symbol_at(generic_signature_index)->as_utf8(); 2869 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1); 2870 strcpy(gen_sig_buf, utf8_gen_sign); 2871 } 2872 } 2873 2874 // fill in the jvmti local variable table 2875 jvmti_table[i].start_location = start_location; 2876 jvmti_table[i].length = length; 2877 jvmti_table[i].name = name_buf; 2878 jvmti_table[i].signature = sig_buf; 2879 jvmti_table[i].generic_signature = gen_sig_buf; 2880 jvmti_table[i].slot = slot; 2881 } 2882 } 2883 2884 // set results 2885 (*entry_count_ptr) = num_entries; 2886 (*table_ptr) = jvmti_table; 2887 2888 return JVMTI_ERROR_NONE; 2889} /* end GetLocalVariableTable */ 2890 2891 2892// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2893// bytecode_count_ptr - pre-checked for NULL 2894// bytecodes_ptr - pre-checked for NULL 2895jvmtiError 2896JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) { 2897 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2898 2899 HandleMark hm; 2900 methodHandle method(method_oop); 2901 jint size = (jint)method->code_size(); 2902 jvmtiError err = allocate(size, bytecodes_ptr); 2903 if (err != JVMTI_ERROR_NONE) { 2904 return err; 2905 } 2906 2907 (*bytecode_count_ptr) = size; 2908 // get byte codes 2909 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr); 2910 2911 return JVMTI_ERROR_NONE; 2912} /* end GetBytecodes */ 2913 2914 2915// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2916// is_native_ptr - pre-checked for NULL 2917jvmtiError 2918JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) { 2919 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2920 (*is_native_ptr) = method_oop->is_native(); 2921 return JVMTI_ERROR_NONE; 2922} /* end IsMethodNative */ 2923 2924 2925// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2926// is_synthetic_ptr - pre-checked for NULL 2927jvmtiError 2928JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) { 2929 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); 2930 (*is_synthetic_ptr) = method_oop->is_synthetic(); 2931 return JVMTI_ERROR_NONE; 2932} /* end IsMethodSynthetic */ 2933 2934 2935// method_oop - pre-checked for validity, but may be NULL meaning obsolete method 2936// is_obsolete_ptr - pre-checked for NULL 2937jvmtiError 2938JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) { 2939 if (use_version_1_0_semantics() && 2940 get_capabilities()->can_redefine_classes == 0) { 2941 // This JvmtiEnv requested version 1.0 semantics and this function 2942 // requires the can_redefine_classes capability in version 1.0 so 2943 // we need to return an error here. 2944 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 2945 } 2946 2947 if (method_oop == NULL || method_oop->is_obsolete()) { 2948 *is_obsolete_ptr = true; 2949 } else { 2950 *is_obsolete_ptr = false; 2951 } 2952 return JVMTI_ERROR_NONE; 2953} /* end IsMethodObsolete */ 2954 2955 // 2956 // Raw Monitor functions 2957 // 2958 2959// name - pre-checked for NULL 2960// monitor_ptr - pre-checked for NULL 2961jvmtiError 2962JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) { 2963 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name); 2964 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY); 2965 2966 *monitor_ptr = (jrawMonitorID)rmonitor; 2967 2968 return JVMTI_ERROR_NONE; 2969} /* end CreateRawMonitor */ 2970 2971 2972// rmonitor - pre-checked for validity 2973jvmtiError 2974JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) { 2975 if (Threads::number_of_threads() == 0) { 2976 // Remove this monitor from pending raw monitors list 2977 // if it has entered in onload or start phase. 2978 JvmtiPendingMonitors::destroy(rmonitor); 2979 } else { 2980 Thread* thread = Thread::current(); 2981 if (rmonitor->is_entered(thread)) { 2982 // The caller owns this monitor which we are about to destroy. 2983 // We exit the underlying synchronization object so that the 2984 // "delete monitor" call below can work without an assertion 2985 // failure on systems that don't like destroying synchronization 2986 // objects that are locked. 2987 int r; 2988 intptr_t recursion = rmonitor->recursions(); 2989 for (intptr_t i=0; i <= recursion; i++) { 2990 r = rmonitor->raw_exit(thread); 2991 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 2992 if (r != ObjectMonitor::OM_OK) { // robustness 2993 return JVMTI_ERROR_INTERNAL; 2994 } 2995 } 2996 } 2997 if (rmonitor->owner() != NULL) { 2998 // The caller is trying to destroy a monitor that is locked by 2999 // someone else. While this is not forbidden by the JVMTI 3000 // spec, it will cause an assertion failure on systems that don't 3001 // like destroying synchronization objects that are locked. 3002 // We indicate a problem with the error return (and leak the 3003 // monitor's memory). 3004 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3005 } 3006 } 3007 3008 delete rmonitor; 3009 3010 return JVMTI_ERROR_NONE; 3011} /* end DestroyRawMonitor */ 3012 3013 3014// rmonitor - pre-checked for validity 3015jvmtiError 3016JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) { 3017 if (Threads::number_of_threads() == 0) { 3018 // No JavaThreads exist so ObjectMonitor enter cannot be 3019 // used, add this raw monitor to the pending list. 3020 // The pending monitors will be actually entered when 3021 // the VM is setup. 3022 // See transition_pending_raw_monitors in create_vm() 3023 // in thread.cpp. 3024 JvmtiPendingMonitors::enter(rmonitor); 3025 } else { 3026 int r; 3027 Thread* thread = Thread::current(); 3028 3029 if (thread->is_Java_thread()) { 3030 JavaThread* current_thread = (JavaThread*)thread; 3031 3032#ifdef PROPER_TRANSITIONS 3033 // Not really unknown but ThreadInVMfromNative does more than we want 3034 ThreadInVMfromUnknown __tiv; 3035 { 3036 ThreadBlockInVM __tbivm(current_thread); 3037 r = rmonitor->raw_enter(current_thread); 3038 } 3039#else 3040 /* Transition to thread_blocked without entering vm state */ 3041 /* This is really evil. Normally you can't undo _thread_blocked */ 3042 /* transitions like this because it would cause us to miss a */ 3043 /* safepoint but since the thread was already in _thread_in_native */ 3044 /* the thread is not leaving a safepoint safe state and it will */ 3045 /* block when it tries to return from native. We can't safepoint */ 3046 /* block in here because we could deadlock the vmthread. Blech. */ 3047 3048 JavaThreadState state = current_thread->thread_state(); 3049 assert(state == _thread_in_native, "Must be _thread_in_native"); 3050 // frame should already be walkable since we are in native 3051 assert(!current_thread->has_last_Java_frame() || 3052 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3053 current_thread->set_thread_state(_thread_blocked); 3054 3055 r = rmonitor->raw_enter(current_thread); 3056 // restore state, still at a safepoint safe state 3057 current_thread->set_thread_state(state); 3058 3059#endif /* PROPER_TRANSITIONS */ 3060 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked"); 3061 } else { 3062 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3063 r = rmonitor->raw_enter(thread); 3064 } else { 3065 ShouldNotReachHere(); 3066 } 3067 } 3068 3069 if (r != ObjectMonitor::OM_OK) { // robustness 3070 return JVMTI_ERROR_INTERNAL; 3071 } 3072 } 3073 return JVMTI_ERROR_NONE; 3074} /* end RawMonitorEnter */ 3075 3076 3077// rmonitor - pre-checked for validity 3078jvmtiError 3079JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) { 3080 jvmtiError err = JVMTI_ERROR_NONE; 3081 3082 if (Threads::number_of_threads() == 0) { 3083 // No JavaThreads exist so just remove this monitor from the pending list. 3084 // Bool value from exit is false if rmonitor is not in the list. 3085 if (!JvmtiPendingMonitors::exit(rmonitor)) { 3086 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3087 } 3088 } else { 3089 int r; 3090 Thread* thread = Thread::current(); 3091 3092 if (thread->is_Java_thread()) { 3093 JavaThread* current_thread = (JavaThread*)thread; 3094#ifdef PROPER_TRANSITIONS 3095 // Not really unknown but ThreadInVMfromNative does more than we want 3096 ThreadInVMfromUnknown __tiv; 3097#endif /* PROPER_TRANSITIONS */ 3098 r = rmonitor->raw_exit(current_thread); 3099 } else { 3100 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3101 r = rmonitor->raw_exit(thread); 3102 } else { 3103 ShouldNotReachHere(); 3104 } 3105 } 3106 3107 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3108 err = JVMTI_ERROR_NOT_MONITOR_OWNER; 3109 } else { 3110 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); 3111 if (r != ObjectMonitor::OM_OK) { // robustness 3112 err = JVMTI_ERROR_INTERNAL; 3113 } 3114 } 3115 } 3116 return err; 3117} /* end RawMonitorExit */ 3118 3119 3120// rmonitor - pre-checked for validity 3121jvmtiError 3122JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) { 3123 int r; 3124 Thread* thread = Thread::current(); 3125 3126 if (thread->is_Java_thread()) { 3127 JavaThread* current_thread = (JavaThread*)thread; 3128#ifdef PROPER_TRANSITIONS 3129 // Not really unknown but ThreadInVMfromNative does more than we want 3130 ThreadInVMfromUnknown __tiv; 3131 { 3132 ThreadBlockInVM __tbivm(current_thread); 3133 r = rmonitor->raw_wait(millis, true, current_thread); 3134 } 3135#else 3136 /* Transition to thread_blocked without entering vm state */ 3137 /* This is really evil. Normally you can't undo _thread_blocked */ 3138 /* transitions like this because it would cause us to miss a */ 3139 /* safepoint but since the thread was already in _thread_in_native */ 3140 /* the thread is not leaving a safepoint safe state and it will */ 3141 /* block when it tries to return from native. We can't safepoint */ 3142 /* block in here because we could deadlock the vmthread. Blech. */ 3143 3144 JavaThreadState state = current_thread->thread_state(); 3145 assert(state == _thread_in_native, "Must be _thread_in_native"); 3146 // frame should already be walkable since we are in native 3147 assert(!current_thread->has_last_Java_frame() || 3148 current_thread->frame_anchor()->walkable(), "Must be walkable"); 3149 current_thread->set_thread_state(_thread_blocked); 3150 3151 r = rmonitor->raw_wait(millis, true, current_thread); 3152 // restore state, still at a safepoint safe state 3153 current_thread->set_thread_state(state); 3154 3155#endif /* PROPER_TRANSITIONS */ 3156 } else { 3157 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3158 r = rmonitor->raw_wait(millis, true, thread); 3159 } else { 3160 ShouldNotReachHere(); 3161 } 3162 } 3163 3164 switch (r) { 3165 case ObjectMonitor::OM_INTERRUPTED: 3166 return JVMTI_ERROR_INTERRUPT; 3167 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE: 3168 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3169 } 3170 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked"); 3171 if (r != ObjectMonitor::OM_OK) { // robustness 3172 return JVMTI_ERROR_INTERNAL; 3173 } 3174 3175 return JVMTI_ERROR_NONE; 3176} /* end RawMonitorWait */ 3177 3178 3179// rmonitor - pre-checked for validity 3180jvmtiError 3181JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) { 3182 int r; 3183 Thread* thread = Thread::current(); 3184 3185 if (thread->is_Java_thread()) { 3186 JavaThread* current_thread = (JavaThread*)thread; 3187 // Not really unknown but ThreadInVMfromNative does more than we want 3188 ThreadInVMfromUnknown __tiv; 3189 r = rmonitor->raw_notify(current_thread); 3190 } else { 3191 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3192 r = rmonitor->raw_notify(thread); 3193 } else { 3194 ShouldNotReachHere(); 3195 } 3196 } 3197 3198 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3199 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3200 } 3201 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked"); 3202 if (r != ObjectMonitor::OM_OK) { // robustness 3203 return JVMTI_ERROR_INTERNAL; 3204 } 3205 3206 return JVMTI_ERROR_NONE; 3207} /* end RawMonitorNotify */ 3208 3209 3210// rmonitor - pre-checked for validity 3211jvmtiError 3212JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) { 3213 int r; 3214 Thread* thread = Thread::current(); 3215 3216 if (thread->is_Java_thread()) { 3217 JavaThread* current_thread = (JavaThread*)thread; 3218 ThreadInVMfromUnknown __tiv; 3219 r = rmonitor->raw_notifyAll(current_thread); 3220 } else { 3221 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { 3222 r = rmonitor->raw_notifyAll(thread); 3223 } else { 3224 ShouldNotReachHere(); 3225 } 3226 } 3227 3228 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { 3229 return JVMTI_ERROR_NOT_MONITOR_OWNER; 3230 } 3231 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked"); 3232 if (r != ObjectMonitor::OM_OK) { // robustness 3233 return JVMTI_ERROR_INTERNAL; 3234 } 3235 3236 return JVMTI_ERROR_NONE; 3237} /* end RawMonitorNotifyAll */ 3238 3239 3240 // 3241 // JNI Function Interception functions 3242 // 3243 3244 3245// function_table - pre-checked for NULL 3246jvmtiError 3247JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) { 3248 // Copy jni function table at safepoint. 3249 VM_JNIFunctionTableCopier copier(function_table); 3250 VMThread::execute(&copier); 3251 3252 return JVMTI_ERROR_NONE; 3253} /* end SetJNIFunctionTable */ 3254 3255 3256// function_table - pre-checked for NULL 3257jvmtiError 3258JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) { 3259 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface)); 3260 if (*function_table == NULL) 3261 return JVMTI_ERROR_OUT_OF_MEMORY; 3262 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface)); 3263 return JVMTI_ERROR_NONE; 3264} /* end GetJNIFunctionTable */ 3265 3266 3267 // 3268 // Event Management functions 3269 // 3270 3271jvmtiError 3272JvmtiEnv::GenerateEvents(jvmtiEvent event_type) { 3273 // can only generate two event types 3274 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD && 3275 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) { 3276 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 3277 } 3278 3279 // for compiled_method_load events we must check that the environment 3280 // has the can_generate_compiled_method_load_events capability. 3281 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) { 3282 if (get_capabilities()->can_generate_compiled_method_load_events == 0) { 3283 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; 3284 } 3285 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this); 3286 } else { 3287 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this); 3288 } 3289 3290} /* end GenerateEvents */ 3291 3292 3293 // 3294 // Extension Mechanism functions 3295 // 3296 3297// extension_count_ptr - pre-checked for NULL 3298// extensions - pre-checked for NULL 3299jvmtiError 3300JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) { 3301 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions); 3302} /* end GetExtensionFunctions */ 3303 3304 3305// extension_count_ptr - pre-checked for NULL 3306// extensions - pre-checked for NULL 3307jvmtiError 3308JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) { 3309 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions); 3310} /* end GetExtensionEvents */ 3311 3312 3313// callback - NULL is a valid value, must be checked 3314jvmtiError 3315JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) { 3316 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback); 3317} /* end SetExtensionEventCallback */ 3318 3319 // 3320 // Timers functions 3321 // 3322 3323// info_ptr - pre-checked for NULL 3324jvmtiError 3325JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3326 os::current_thread_cpu_time_info(info_ptr); 3327 return JVMTI_ERROR_NONE; 3328} /* end GetCurrentThreadCpuTimerInfo */ 3329 3330 3331// nanos_ptr - pre-checked for NULL 3332jvmtiError 3333JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) { 3334 *nanos_ptr = os::current_thread_cpu_time(); 3335 return JVMTI_ERROR_NONE; 3336} /* end GetCurrentThreadCpuTime */ 3337 3338 3339// info_ptr - pre-checked for NULL 3340jvmtiError 3341JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { 3342 os::thread_cpu_time_info(info_ptr); 3343 return JVMTI_ERROR_NONE; 3344} /* end GetThreadCpuTimerInfo */ 3345 3346 3347// Threads_lock NOT held, java_thread not protected by lock 3348// java_thread - pre-checked 3349// nanos_ptr - pre-checked for NULL 3350jvmtiError 3351JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) { 3352 *nanos_ptr = os::thread_cpu_time(java_thread); 3353 return JVMTI_ERROR_NONE; 3354} /* end GetThreadCpuTime */ 3355 3356 3357// info_ptr - pre-checked for NULL 3358jvmtiError 3359JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) { 3360 os::javaTimeNanos_info(info_ptr); 3361 return JVMTI_ERROR_NONE; 3362} /* end GetTimerInfo */ 3363 3364 3365// nanos_ptr - pre-checked for NULL 3366jvmtiError 3367JvmtiEnv::GetTime(jlong* nanos_ptr) { 3368 *nanos_ptr = os::javaTimeNanos(); 3369 return JVMTI_ERROR_NONE; 3370} /* end GetTime */ 3371 3372 3373// processor_count_ptr - pre-checked for NULL 3374jvmtiError 3375JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) { 3376 *processor_count_ptr = os::active_processor_count(); 3377 return JVMTI_ERROR_NONE; 3378} /* end GetAvailableProcessors */ 3379 3380 // 3381 // System Properties functions 3382 // 3383 3384// count_ptr - pre-checked for NULL 3385// property_ptr - pre-checked for NULL 3386jvmtiError 3387JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) { 3388 jvmtiError err = JVMTI_ERROR_NONE; 3389 3390 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties()); 3391 3392 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr); 3393 if (err != JVMTI_ERROR_NONE) { 3394 return err; 3395 } 3396 int i = 0 ; 3397 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) { 3398 const char *key = p->key(); 3399 char **tmp_value = *property_ptr+i; 3400 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value); 3401 if (err == JVMTI_ERROR_NONE) { 3402 strcpy(*tmp_value, key); 3403 } else { 3404 // clean up previously allocated memory. 3405 for (int j=0; j<i; j++) { 3406 Deallocate((unsigned char*)*property_ptr+j); 3407 } 3408 Deallocate((unsigned char*)property_ptr); 3409 break; 3410 } 3411 } 3412 return err; 3413} /* end GetSystemProperties */ 3414 3415 3416// property - pre-checked for NULL 3417// value_ptr - pre-checked for NULL 3418jvmtiError 3419JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) { 3420 jvmtiError err = JVMTI_ERROR_NONE; 3421 const char *value; 3422 3423 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property); 3424 if (value == NULL) { 3425 err = JVMTI_ERROR_NOT_AVAILABLE; 3426 } else { 3427 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr); 3428 if (err == JVMTI_ERROR_NONE) { 3429 strcpy(*value_ptr, value); 3430 } 3431 } 3432 return err; 3433} /* end GetSystemProperty */ 3434 3435 3436// property - pre-checked for NULL 3437// value - NULL is a valid value, must be checked 3438jvmtiError 3439JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) { 3440 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE; 3441 3442 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 3443 if (strcmp(property, p->key()) == 0) { 3444 if (p->set_value((char *)value_ptr)) { 3445 err = JVMTI_ERROR_NONE; 3446 } 3447 } 3448 } 3449 return err; 3450} /* end SetSystemProperty */ 3451 3452#endif // !JVMTI_KERNEL 3453