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src/hotspot/share/oops/instanceKlass.cpp

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  52 #include "logging/logStream.hpp"
  53 #include "memory/allocation.inline.hpp"
  54 #include "memory/iterator.inline.hpp"
  55 #include "memory/metadataFactory.hpp"
  56 #include "memory/metaspaceClosure.hpp"
  57 #include "memory/oopFactory.hpp"
  58 #include "memory/resourceArea.hpp"
  59 #include "memory/universe.hpp"
  60 #include "oops/fieldStreams.inline.hpp"
  61 #include "oops/constantPool.hpp"
  62 #include "oops/instanceClassLoaderKlass.hpp"
  63 #include "oops/instanceKlass.inline.hpp"
  64 #include "oops/instanceMirrorKlass.hpp"
  65 #include "oops/instanceOop.hpp"
  66 #include "oops/instanceStackChunkKlass.hpp"
  67 #include "oops/klass.inline.hpp"
  68 #include "oops/method.hpp"
  69 #include "oops/oop.inline.hpp"
  70 #include "oops/recordComponent.hpp"
  71 #include "oops/symbol.hpp"

  72 #include "prims/jvmtiExport.hpp"
  73 #include "prims/jvmtiRedefineClasses.hpp"
  74 #include "prims/jvmtiThreadState.hpp"
  75 #include "prims/methodComparator.hpp"
  76 #include "runtime/arguments.hpp"
  77 #include "runtime/atomic.hpp"
  78 #include "runtime/fieldDescriptor.inline.hpp"
  79 #include "runtime/handles.inline.hpp"
  80 #include "runtime/javaCalls.hpp"
  81 #include "runtime/javaThread.inline.hpp"
  82 #include "runtime/mutexLocker.hpp"
  83 #include "runtime/orderAccess.hpp"
  84 #include "runtime/reflectionUtils.hpp"
  85 #include "runtime/threads.hpp"
  86 #include "services/classLoadingService.hpp"
  87 #include "services/finalizerService.hpp"
  88 #include "services/threadService.hpp"
  89 #include "utilities/dtrace.hpp"
  90 #include "utilities/events.hpp"
  91 #include "utilities/macros.hpp"

 146 
 147 static inline bool is_class_loader(const Symbol* class_name,
 148                                    const ClassFileParser& parser) {
 149   assert(class_name != NULL, "invariant");
 150 
 151   if (class_name == vmSymbols::java_lang_ClassLoader()) {
 152     return true;
 153   }
 154 
 155   if (vmClasses::ClassLoader_klass_loaded()) {
 156     const Klass* const super_klass = parser.super_klass();
 157     if (super_klass != NULL) {
 158       if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
 159         return true;
 160       }
 161     }
 162   }
 163   return false;
 164 }
 165 


 166 static inline bool is_stack_chunk_class(const Symbol* class_name,
 167                                         const ClassLoaderData* loader_data) {
 168   return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
 169           loader_data->is_the_null_class_loader_data());
 170 }
 171 
 172 // private: called to verify that k is a static member of this nest.
 173 // We know that k is an instance class in the same package and hence the
 174 // same classloader.
 175 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
 176   assert(!is_hidden(), "unexpected hidden class");
 177   if (_nest_members == NULL || _nest_members == Universe::the_empty_short_array()) {
 178     if (log_is_enabled(Trace, class, nestmates)) {
 179       ResourceMark rm(current);
 180       log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
 181                                   k->external_name(), this->external_name());
 182     }
 183     return false;
 184   }
 185 

 418   log_trace(class, nestmates)("Class %s does %shave nestmate access to %s",
 419                               this->external_name(),
 420                               access ? "" : "NOT ",
 421                               k->external_name());
 422   return access;
 423 }
 424 
 425 const char* InstanceKlass::nest_host_error() {
 426   if (_nest_host_index == 0) {
 427     return NULL;
 428   } else {
 429     constantPoolHandle cph(Thread::current(), constants());
 430     return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
 431   }
 432 }
 433 
 434 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
 435   const int size = InstanceKlass::size(parser.vtable_size(),
 436                                        parser.itable_size(),
 437                                        nonstatic_oop_map_size(parser.total_oop_map_count()),
 438                                        parser.is_interface());


 439 
 440   const Symbol* const class_name = parser.class_name();
 441   assert(class_name != NULL, "invariant");
 442   ClassLoaderData* loader_data = parser.loader_data();
 443   assert(loader_data != NULL, "invariant");
 444 
 445   InstanceKlass* ik;
 446 
 447   // Allocation
 448   if (parser.is_instance_ref_klass()) {
 449     // java.lang.ref.Reference
 450     ik = new (loader_data, size, THREAD) InstanceRefKlass(parser);
 451   } else if (class_name == vmSymbols::java_lang_Class()) {
 452     // mirror - java.lang.Class
 453     ik = new (loader_data, size, THREAD) InstanceMirrorKlass(parser);
 454   } else if (is_stack_chunk_class(class_name, loader_data)) {
 455     // stack chunk
 456     ik = new (loader_data, size, THREAD) InstanceStackChunkKlass(parser);
 457   } else if (is_class_loader(class_name, parser)) {
 458     // class loader - java.lang.ClassLoader
 459     ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass(parser);



 460   } else {
 461     // normal
 462     ik = new (loader_data, size, THREAD) InstanceKlass(parser);
 463   }
 464 
 465   // Check for pending exception before adding to the loader data and incrementing
 466   // class count.  Can get OOM here.
 467   if (HAS_PENDING_EXCEPTION) {
 468     return NULL;
 469   }
 470 







 471   return ik;
 472 }
 473 























 474 
 475 // copy method ordering from resource area to Metaspace
 476 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
 477   if (m != NULL) {
 478     // allocate a new array and copy contents (memcpy?)
 479     _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
 480     for (int i = 0; i < m->length(); i++) {
 481       _method_ordering->at_put(i, m->at(i));
 482     }
 483   } else {
 484     _method_ordering = Universe::the_empty_int_array();
 485   }
 486 }
 487 
 488 // create a new array of vtable_indices for default methods
 489 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
 490   Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
 491   assert(default_vtable_indices() == NULL, "only create once");
 492   set_default_vtable_indices(vtable_indices);
 493   return vtable_indices;
 494 }
 495 
 496 static Monitor* create_init_monitor(const char* name) {
 497   return new Monitor(Mutex::safepoint, name);
 498 }
 499 
 500 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
 501   Klass(kind),
 502   _nest_members(NULL),
 503   _nest_host(NULL),
 504   _permitted_subclasses(NULL),
 505   _record_components(NULL),
 506   _static_field_size(parser.static_field_size()),
 507   _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
 508   _itable_len(parser.itable_size()),
 509   _nest_host_index(0),
 510   _init_state(allocated),
 511   _reference_type(reference_type),
 512   _init_monitor(create_init_monitor("InstanceKlassInitMonitor_lock")),
 513   _init_thread(NULL)



 514 {
 515   set_vtable_length(parser.vtable_size());
 516   set_access_flags(parser.access_flags());
 517   if (parser.is_hidden()) set_is_hidden();
 518   set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
 519                                                     false));




 520 
 521   assert(NULL == _methods, "underlying memory not zeroed?");
 522   assert(is_instance_klass(), "is layout incorrect?");
 523   assert(size_helper() == parser.layout_size(), "incorrect size_helper?");




 524 }
 525 
 526 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
 527                                        Array<Method*>* methods) {
 528   if (methods != NULL && methods != Universe::the_empty_method_array() &&
 529       !methods->is_shared()) {
 530     for (int i = 0; i < methods->length(); i++) {
 531       Method* method = methods->at(i);
 532       if (method == NULL) continue;  // maybe null if error processing
 533       // Only want to delete methods that are not executing for RedefineClasses.
 534       // The previous version will point to them so they're not totally dangling
 535       assert (!method->on_stack(), "shouldn't be called with methods on stack");
 536       MetadataFactory::free_metadata(loader_data, method);
 537     }
 538     MetadataFactory::free_array<Method*>(loader_data, methods);
 539   }
 540 }
 541 
 542 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data,
 543                                           const Klass* super_klass,

 668       inner_classes() != Universe::the_empty_short_array() &&
 669       !inner_classes()->is_shared()) {
 670     MetadataFactory::free_array<jushort>(loader_data, inner_classes());
 671   }
 672   set_inner_classes(NULL);
 673 
 674   if (nest_members() != NULL &&
 675       nest_members() != Universe::the_empty_short_array() &&
 676       !nest_members()->is_shared()) {
 677     MetadataFactory::free_array<jushort>(loader_data, nest_members());
 678   }
 679   set_nest_members(NULL);
 680 
 681   if (permitted_subclasses() != NULL &&
 682       permitted_subclasses() != Universe::the_empty_short_array() &&
 683       !permitted_subclasses()->is_shared()) {
 684     MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
 685   }
 686   set_permitted_subclasses(NULL);
 687 






 688   // We should deallocate the Annotations instance if it's not in shared spaces.
 689   if (annotations() != NULL && !annotations()->is_shared()) {
 690     MetadataFactory::free_metadata(loader_data, annotations());
 691   }
 692   set_annotations(NULL);
 693 
 694   SystemDictionaryShared::handle_class_unloading(this);
 695 }
 696 
 697 bool InstanceKlass::is_record() const {
 698   return _record_components != NULL &&
 699          is_final() &&
 700          java_super() == vmClasses::Record_klass();
 701 }
 702 
 703 bool InstanceKlass::is_sealed() const {
 704   return _permitted_subclasses != NULL &&
 705          _permitted_subclasses != Universe::the_empty_short_array();
 706 }
 707 

 818         vmSymbols::java_lang_IncompatibleClassChangeError(),
 819         "class %s has interface %s as super class",
 820         external_name(),
 821         super_klass->external_name()
 822       );
 823       return false;
 824     }
 825 
 826     InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
 827     ik_super->link_class_impl(CHECK_false);
 828   }
 829 
 830   // link all interfaces implemented by this class before linking this class
 831   Array<InstanceKlass*>* interfaces = local_interfaces();
 832   int num_interfaces = interfaces->length();
 833   for (int index = 0; index < num_interfaces; index++) {
 834     InstanceKlass* interk = interfaces->at(index);
 835     interk->link_class_impl(CHECK_false);
 836   }
 837 














































































 838   // in case the class is linked in the process of linking its superclasses
 839   if (is_linked()) {
 840     return true;
 841   }
 842 
 843   // trace only the link time for this klass that includes
 844   // the verification time
 845   PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
 846                              ClassLoader::perf_class_link_selftime(),
 847                              ClassLoader::perf_classes_linked(),
 848                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 849                              jt->get_thread_stat()->perf_timers_addr(),
 850                              PerfClassTraceTime::CLASS_LINK);
 851 
 852   // verification & rewriting
 853   {
 854     LockLinkState init_lock(this, jt);
 855 
 856     // rewritten will have been set if loader constraint error found
 857     // on an earlier link attempt

1062       set_init_thread(jt);
1063     }
1064   }
1065 
1066   // Throw error outside lock
1067   if (throw_error) {
1068     DTRACE_CLASSINIT_PROBE_WAIT(erroneous, -1, wait);
1069     ResourceMark rm(THREAD);
1070     Handle cause(THREAD, get_initialization_error(THREAD));
1071 
1072     stringStream ss;
1073     ss.print("Could not initialize class %s", external_name());
1074     if (cause.is_null()) {
1075       THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1076     } else {
1077       THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1078                       ss.as_string(), cause);
1079     }
1080   }
1081 



















1082   // Step 7
1083   // Next, if C is a class rather than an interface, initialize it's super class and super
1084   // interfaces.
1085   if (!is_interface()) {
1086     Klass* super_klass = super();
1087     if (super_klass != NULL && super_klass->should_be_initialized()) {
1088       super_klass->initialize(THREAD);
1089     }
1090     // If C implements any interface that declares a non-static, concrete method,
1091     // the initialization of C triggers initialization of its super interfaces.
1092     // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1093     // having a superinterface that declares, non-static, concrete methods
1094     if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1095       initialize_super_interfaces(THREAD);
1096     }
1097 
1098     // If any exceptions, complete abruptly, throwing the same exception as above.
1099     if (HAS_PENDING_EXCEPTION) {
1100       Handle e(THREAD, PENDING_EXCEPTION);
1101       CLEAR_PENDING_EXCEPTION;
1102       {
1103         EXCEPTION_MARK;
1104         add_initialization_error(THREAD, e);
1105         // Locks object, set state, and notify all waiting threads
1106         set_initialization_state_and_notify(initialization_error, THREAD);
1107         CLEAR_PENDING_EXCEPTION;
1108       }
1109       DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1110       THROW_OOP(e());
1111     }
1112   }
1113 
1114 
1115   // Step 8









































1116   {
1117     DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1118     if (class_initializer() != NULL) {
1119       // Timer includes any side effects of class initialization (resolution,
1120       // etc), but not recursive entry into call_class_initializer().
1121       PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1122                                ClassLoader::perf_class_init_selftime(),
1123                                ClassLoader::perf_classes_inited(),
1124                                jt->get_thread_stat()->perf_recursion_counts_addr(),
1125                                jt->get_thread_stat()->perf_timers_addr(),
1126                                PerfClassTraceTime::CLASS_CLINIT);
1127       call_class_initializer(THREAD);
1128     } else {
1129       // The elapsed time is so small it's not worth counting.
1130       if (UsePerfData) {
1131         ClassLoader::perf_classes_inited()->inc();
1132       }
1133       call_class_initializer(THREAD);
1134     }
1135   }
1136 
1137   // Step 9
1138   if (!HAS_PENDING_EXCEPTION) {
1139     set_initialization_state_and_notify(fully_initialized, THREAD);
1140     debug_only(vtable().verify(tty, true);)
1141   }
1142   else {
1143     // Step 10 and 11
1144     Handle e(THREAD, PENDING_EXCEPTION);
1145     CLEAR_PENDING_EXCEPTION;
1146     // JVMTI has already reported the pending exception
1147     // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1148     JvmtiExport::clear_detected_exception(jt);
1149     {
1150       EXCEPTION_MARK;
1151       add_initialization_error(THREAD, e);
1152       set_initialization_state_and_notify(initialization_error, THREAD);
1153       CLEAR_PENDING_EXCEPTION;   // ignore any exception thrown, class initialization error is thrown below
1154       // JVMTI has already reported the pending exception
1155       // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1156       JvmtiExport::clear_detected_exception(jt);
1157     }
1158     DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1159     if (e->is_a(vmClasses::Error_klass())) {
1160       THROW_OOP(e());
1161     } else {
1162       JavaCallArguments args(e);
1163       THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),

1392               : vmSymbols::java_lang_InstantiationException(), external_name());
1393   }
1394   if (this == vmClasses::Class_klass()) {
1395     ResourceMark rm(THREAD);
1396     THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1397               : vmSymbols::java_lang_IllegalAccessException(), external_name());
1398   }
1399 }
1400 
1401 Klass* InstanceKlass::array_klass(int n, TRAPS) {
1402   // Need load-acquire for lock-free read
1403   if (array_klasses_acquire() == NULL) {
1404     ResourceMark rm(THREAD);
1405     JavaThread *jt = THREAD;
1406     {
1407       // Atomic creation of array_klasses
1408       MutexLocker ma(THREAD, MultiArray_lock);
1409 
1410       // Check if update has already taken place
1411       if (array_klasses() == NULL) {
1412         ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, CHECK_NULL);

1413         // use 'release' to pair with lock-free load
1414         release_set_array_klasses(k);
1415       }
1416     }
1417   }
1418   // array_klasses() will always be set at this point
1419   ObjArrayKlass* oak = array_klasses();
1420   return oak->array_klass(n, THREAD);
1421 }
1422 
1423 Klass* InstanceKlass::array_klass_or_null(int n) {
1424   // Need load-acquire for lock-free read
1425   ObjArrayKlass* oak = array_klasses_acquire();
1426   if (oak == NULL) {
1427     return NULL;
1428   } else {
1429     return oak->array_klass_or_null(n);
1430   }
1431 }
1432 
1433 Klass* InstanceKlass::array_klass(TRAPS) {
1434   return array_klass(1, THREAD);
1435 }
1436 
1437 Klass* InstanceKlass::array_klass_or_null() {
1438   return array_klass_or_null(1);
1439 }
1440 
1441 static int call_class_initializer_counter = 0;   // for debugging
1442 
1443 Method* InstanceKlass::class_initializer() const {
1444   Method* clinit = find_method(
1445       vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1446   if (clinit != NULL && clinit->has_valid_initializer_flags()) {
1447     return clinit;
1448   }
1449   return NULL;
1450 }
1451 
1452 void InstanceKlass::call_class_initializer(TRAPS) {
1453   if (ReplayCompiles &&
1454       (ReplaySuppressInitializers == 1 ||
1455        (ReplaySuppressInitializers >= 2 && class_loader() != NULL))) {
1456     // Hide the existence of the initializer for the purpose of replaying the compile
1457     return;
1458   }
1459 
1460 #if INCLUDE_CDS
1461   // This is needed to ensure the consistency of the archived heap objects.
1462   if (has_archived_enum_objs()) {
1463     assert(is_shared(), "must be");
1464     bool initialized = HeapShared::initialize_enum_klass(this, CHECK);
1465     if (initialized) {
1466       return;

1475     ResourceMark rm(THREAD);
1476     LogStream ls(lt);
1477     ls.print("%d Initializing ", call_class_initializer_counter++);
1478     name()->print_value_on(&ls);
1479     ls.print_cr("%s (" PTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", p2i(this));
1480   }
1481   if (h_method() != NULL) {
1482     JavaCallArguments args; // No arguments
1483     JavaValue result(T_VOID);
1484     JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
1485   }
1486 }
1487 
1488 
1489 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1490   InterpreterOopMap* entry_for) {
1491   // Lazily create the _oop_map_cache at first request
1492   // Lock-free access requires load_acquire.
1493   OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1494   if (oop_map_cache == NULL) {
1495     MutexLocker x(OopMapCacheAlloc_lock);
1496     // Check if _oop_map_cache was allocated while we were waiting for this lock
1497     if ((oop_map_cache = _oop_map_cache) == NULL) {
1498       oop_map_cache = new OopMapCache();
1499       // Ensure _oop_map_cache is stable, since it is examined without a lock
1500       Atomic::release_store(&_oop_map_cache, oop_map_cache);
1501     }
1502   }
1503   // _oop_map_cache is constant after init; lookup below does its own locking.
1504   oop_map_cache->lookup(method, bci, entry_for);
1505 }
1506 
1507 bool InstanceKlass::contains_field_offset(int offset) {
1508   fieldDescriptor fd;
1509   return find_field_from_offset(offset, false, &fd);
1510 }
1511 
1512 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1513   for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1514     Symbol* f_name = fs.name();
1515     Symbol* f_sig  = fs.signature();
1516     if (f_name == name && f_sig == sig) {
1517       fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1518       return true;
1519     }
1520   }
1521   return false;
1522 }
1523 
1524 
1525 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1526   const int n = local_interfaces()->length();
1527   for (int i = 0; i < n; i++) {
1528     Klass* intf1 = local_interfaces()->at(i);
1529     assert(intf1->is_interface(), "just checking type");
1530     // search for field in current interface
1531     if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) {

1562 
1563 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1564   // search order according to newest JVM spec (5.4.3.2, p.167).
1565   // 1) search for field in current klass
1566   if (find_local_field(name, sig, fd)) {
1567     if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1568   }
1569   // 2) search for field recursively in direct superinterfaces
1570   if (is_static) {
1571     Klass* intf = find_interface_field(name, sig, fd);
1572     if (intf != NULL) return intf;
1573   }
1574   // 3) apply field lookup recursively if superclass exists
1575   { Klass* supr = super();
1576     if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1577   }
1578   // 4) otherwise field lookup fails
1579   return NULL;
1580 }
1581 









1582 
1583 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1584   for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1585     if (fs.offset() == offset) {
1586       fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1587       if (fd->is_static() == is_static) return true;
1588     }
1589   }
1590   return false;
1591 }
1592 
1593 
1594 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1595   Klass* klass = const_cast<InstanceKlass*>(this);
1596   while (klass != NULL) {
1597     if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1598       return true;
1599     }
1600     klass = klass->super();
1601   }

1954 }
1955 
1956 // uncached_lookup_method searches both the local class methods array and all
1957 // superclasses methods arrays, skipping any overpass methods in superclasses,
1958 // and possibly skipping private methods.
1959 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
1960                                               const Symbol* signature,
1961                                               OverpassLookupMode overpass_mode,
1962                                               PrivateLookupMode private_mode) const {
1963   OverpassLookupMode overpass_local_mode = overpass_mode;
1964   const Klass* klass = this;
1965   while (klass != NULL) {
1966     Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
1967                                                                         signature,
1968                                                                         overpass_local_mode,
1969                                                                         StaticLookupMode::find,
1970                                                                         private_mode);
1971     if (method != NULL) {
1972       return method;
1973     }




1974     klass = klass->super();
1975     overpass_local_mode = OverpassLookupMode::skip;   // Always ignore overpass methods in superclasses
1976   }
1977   return NULL;
1978 }
1979 
1980 #ifdef ASSERT
1981 // search through class hierarchy and return true if this class or
1982 // one of the superclasses was redefined
1983 bool InstanceKlass::has_redefined_this_or_super() const {
1984   const Klass* klass = this;
1985   while (klass != NULL) {
1986     if (InstanceKlass::cast(klass)->has_been_redefined()) {
1987       return true;
1988     }
1989     klass = klass->super();
1990   }
1991   return false;
1992 }
1993 #endif

2417   if (itable_length() > 0) {
2418     itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable();
2419     int method_table_offset_in_words = ioe->offset()/wordSize;
2420     int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words())
2421                          / itableOffsetEntry::size();
2422 
2423     for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2424       if (ioe->interface_klass() != NULL) {
2425         it->push(ioe->interface_klass_addr());
2426         itableMethodEntry* ime = ioe->first_method_entry(this);
2427         int n = klassItable::method_count_for_interface(ioe->interface_klass());
2428         for (int index = 0; index < n; index ++) {
2429           it->push(ime[index].method_addr());
2430         }
2431       }
2432     }
2433   }
2434 
2435   it->push(&_nest_members);
2436   it->push(&_permitted_subclasses);

2437   it->push(&_record_components);






2438 }
2439 
2440 #if INCLUDE_CDS
2441 void InstanceKlass::remove_unshareable_info() {
2442 
2443   if (is_linked()) {
2444     assert(can_be_verified_at_dumptime(), "must be");
2445     // Remember this so we can avoid walking the hierarchy at runtime.
2446     set_verified_at_dump_time();
2447   }
2448 
2449   Klass::remove_unshareable_info();
2450 
2451   if (SystemDictionaryShared::has_class_failed_verification(this)) {
2452     // Classes are attempted to link during dumping and may fail,
2453     // but these classes are still in the dictionary and class list in CLD.
2454     // If the class has failed verification, there is nothing else to remove.
2455     return;
2456   }
2457 

2461   // being added to class hierarchy (see SystemDictionary:::add_to_hierarchy()).
2462   _init_state = allocated;
2463 
2464   { // Otherwise this needs to take out the Compile_lock.
2465     assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2466     init_implementor();
2467   }
2468 
2469   constants()->remove_unshareable_info();
2470 
2471   for (int i = 0; i < methods()->length(); i++) {
2472     Method* m = methods()->at(i);
2473     m->remove_unshareable_info();
2474   }
2475 
2476   // do array classes also.
2477   if (array_klasses() != NULL) {
2478     array_klasses()->remove_unshareable_info();
2479   }
2480 








2481   // These are not allocated from metaspace. They are safe to set to NULL.
2482   _source_debug_extension = NULL;
2483   _dep_context = NULL;
2484   _osr_nmethods_head = NULL;
2485 #if INCLUDE_JVMTI
2486   _breakpoints = NULL;
2487   _previous_versions = NULL;
2488   _cached_class_file = NULL;
2489   _jvmti_cached_class_field_map = NULL;
2490 #endif
2491 
2492   _init_thread = NULL;
2493   _methods_jmethod_ids = NULL;
2494   _jni_ids = NULL;
2495   _oop_map_cache = NULL;
2496   // clear _nest_host to ensure re-load at runtime
2497   _nest_host = NULL;
2498   init_shared_package_entry();
2499   _dep_context_last_cleaned = 0;
2500   _init_monitor = NULL;

2523     if (is_shared_unregistered_class()) {
2524       _package_entry = NULL;
2525     } else {
2526       _package_entry = PackageEntry::get_archived_entry(_package_entry);
2527     }
2528   }
2529   ArchivePtrMarker::mark_pointer((address**)&_package_entry);
2530 #endif
2531 }
2532 
2533 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2534                                              PackageEntry* pkg_entry, TRAPS) {
2535   // SystemDictionary::add_to_hierarchy() sets the init_state to loaded
2536   // before the InstanceKlass is added to the SystemDictionary. Make
2537   // sure the current state is <loaded.
2538   assert(!is_loaded(), "invalid init state");
2539   assert(!shared_loading_failed(), "Must not try to load failed class again");
2540   set_package(loader_data, pkg_entry, CHECK);
2541   Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2542 




2543   Array<Method*>* methods = this->methods();
2544   int num_methods = methods->length();
2545   for (int index = 0; index < num_methods; ++index) {
2546     methods->at(index)->restore_unshareable_info(CHECK);
2547   }
2548 #if INCLUDE_JVMTI
2549   if (JvmtiExport::has_redefined_a_class()) {
2550     // Reinitialize vtable because RedefineClasses may have changed some
2551     // entries in this vtable for super classes so the CDS vtable might
2552     // point to old or obsolete entries.  RedefineClasses doesn't fix up
2553     // vtables in the shared system dictionary, only the main one.
2554     // It also redefines the itable too so fix that too.
2555     // First fix any default methods that point to a super class that may
2556     // have been redefined.
2557     bool trace_name_printed = false;
2558     adjust_default_methods(&trace_name_printed);
2559     vtable().initialize_vtable();
2560     itable().initialize_itable();
2561   }
2562 #endif

2705 
2706 void InstanceKlass::set_source_debug_extension(const char* array, int length) {
2707   if (array == NULL) {
2708     _source_debug_extension = NULL;
2709   } else {
2710     // Adding one to the attribute length in order to store a null terminator
2711     // character could cause an overflow because the attribute length is
2712     // already coded with an u4 in the classfile, but in practice, it's
2713     // unlikely to happen.
2714     assert((length+1) > length, "Overflow checking");
2715     char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
2716     for (int i = 0; i < length; i++) {
2717       sde[i] = array[i];
2718     }
2719     sde[length] = '\0';
2720     _source_debug_extension = sde;
2721   }
2722 }
2723 
2724 const char* InstanceKlass::signature_name() const {


2725 

2726   // Get the internal name as a c string
2727   const char* src = (const char*) (name()->as_C_string());
2728   const int src_length = (int)strlen(src);
2729 
2730   char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
2731 
2732   // Add L as type indicator
2733   int dest_index = 0;
2734   dest[dest_index++] = JVM_SIGNATURE_CLASS;
2735 
2736   // Add the actual class name
2737   for (int src_index = 0; src_index < src_length; ) {
2738     dest[dest_index++] = src[src_index++];
2739   }
2740 
2741   if (is_hidden()) { // Replace the last '+' with a '.'.
2742     for (int index = (int)src_length; index > 0; index--) {
2743       if (dest[index] == '+') {
2744         dest[index] = JVM_SIGNATURE_DOT;
2745         break;
2746       }
2747     }
2748   }
2749 
2750   // Add the semicolon and the NULL
2751   dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
2752   dest[dest_index] = '\0';
2753   return dest;
2754 }

3056 jint InstanceKlass::compute_modifier_flags() const {
3057   jint access = access_flags().as_int();
3058 
3059   // But check if it happens to be member class.
3060   InnerClassesIterator iter(this);
3061   for (; !iter.done(); iter.next()) {
3062     int ioff = iter.inner_class_info_index();
3063     // Inner class attribute can be zero, skip it.
3064     // Strange but true:  JVM spec. allows null inner class refs.
3065     if (ioff == 0) continue;
3066 
3067     // only look at classes that are already loaded
3068     // since we are looking for the flags for our self.
3069     Symbol* inner_name = constants()->klass_name_at(ioff);
3070     if (name() == inner_name) {
3071       // This is really a member class.
3072       access = iter.inner_access_flags();
3073       break;
3074     }
3075   }
3076   // Remember to strip ACC_SUPER bit
3077   return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS;
3078 }
3079 
3080 jint InstanceKlass::jvmti_class_status() const {
3081   jint result = 0;
3082 
3083   if (is_linked()) {
3084     result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3085   }
3086 
3087   if (is_initialized()) {
3088     assert(is_linked(), "Class status is not consistent");
3089     result |= JVMTI_CLASS_STATUS_INITIALIZED;
3090   }
3091   if (is_in_error_state()) {
3092     result |= JVMTI_CLASS_STATUS_ERROR;
3093   }
3094   return result;
3095 }
3096 
3097 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {

3314     }
3315     osr = osr->osr_link();
3316   }
3317 
3318   assert(match_level == false || best == NULL, "shouldn't pick up anything if match_level is set");
3319   if (best != NULL && best->comp_level() >= comp_level) {
3320     return best;
3321   }
3322   return NULL;
3323 }
3324 
3325 // -----------------------------------------------------------------------------------------------------
3326 // Printing
3327 
3328 #define BULLET  " - "
3329 
3330 static const char* state_names[] = {
3331   "allocated", "loaded", "being_linked", "linked", "being_initialized", "fully_initialized", "initialization_error"
3332 };
3333 
3334 static void print_vtable(intptr_t* start, int len, outputStream* st) {



3335   for (int i = 0; i < len; i++) {
3336     intptr_t e = start[i];
3337     st->print("%d : " INTPTR_FORMAT, i, e);





3338     if (MetaspaceObj::is_valid((Metadata*)e)) {
3339       st->print(" ");
3340       ((Metadata*)e)->print_value_on(st);






3341     }
3342     st->cr();
3343   }
3344 }
3345 
3346 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3347   return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);





















3348 }
3349 
3350 const char* InstanceKlass::init_state_name() const {
3351   return state_names[_init_state];
3352 }
3353 
3354 void InstanceKlass::print_on(outputStream* st) const {
3355   assert(is_klass(), "must be klass");
3356   Klass::print_on(st);
3357 
3358   st->print(BULLET"instance size:     %d", size_helper());                        st->cr();
3359   st->print(BULLET"klass size:        %d", size());                               st->cr();
3360   st->print(BULLET"access:            "); access_flags().print_on(st);            st->cr();

3361   st->print(BULLET"state:             "); st->print_cr("%s", init_state_name());
3362   st->print(BULLET"name:              "); name()->print_value_on(st);             st->cr();
3363   st->print(BULLET"super:             "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3364   st->print(BULLET"sub:               ");
3365   Klass* sub = subklass();
3366   int n;
3367   for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) {
3368     if (n < MaxSubklassPrintSize) {
3369       sub->print_value_on(st);
3370       st->print("   ");
3371     }
3372   }
3373   if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3374   st->cr();
3375 
3376   if (is_interface()) {
3377     st->print_cr(BULLET"nof implementors:  %d", nof_implementors());
3378     if (nof_implementors() == 1) {
3379       st->print_cr(BULLET"implementor:    ");
3380       st->print("   ");
3381       implementor()->print_value_on(st);
3382       st->cr();
3383     }
3384   }
3385 
3386   st->print(BULLET"arrays:            "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3387   st->print(BULLET"methods:           "); methods()->print_value_on(st);                  st->cr();
3388   if (Verbose || WizardMode) {
3389     Array<Method*>* method_array = methods();
3390     for (int i = 0; i < method_array->length(); i++) {
3391       st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3392     }
3393   }
3394   st->print(BULLET"method ordering:   "); method_ordering()->print_value_on(st);      st->cr();
3395   st->print(BULLET"default_methods:   "); default_methods()->print_value_on(st);      st->cr();
3396   if (Verbose && default_methods() != NULL) {
3397     Array<Method*>* method_array = default_methods();
3398     for (int i = 0; i < method_array->length(); i++) {
3399       st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3400     }
3401   }
3402   if (default_vtable_indices() != NULL) {
3403     st->print(BULLET"default vtable indices:   "); default_vtable_indices()->print_value_on(st);       st->cr();
3404   }
3405   st->print(BULLET"local interfaces:  "); local_interfaces()->print_value_on(st);      st->cr();
3406   st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3407   st->print(BULLET"constants:         "); constants()->print_value_on(st);         st->cr();
3408   if (class_loader_data() != NULL) {
3409     st->print(BULLET"class loader data:  ");
3410     class_loader_data()->print_value_on(st);
3411     st->cr();
3412   }
3413   if (source_file_name() != NULL) {
3414     st->print(BULLET"source file:       ");
3415     source_file_name()->print_value_on(st);
3416     st->cr();
3417   }
3418   if (source_debug_extension() != NULL) {
3419     st->print(BULLET"source debug extension:       ");
3420     st->print("%s", source_debug_extension());
3421     st->cr();
3422   }
3423   st->print(BULLET"class annotations:       "); class_annotations()->print_value_on(st); st->cr();
3424   st->print(BULLET"class type annotations:  "); class_type_annotations()->print_value_on(st); st->cr();
3425   st->print(BULLET"field annotations:       "); fields_annotations()->print_value_on(st); st->cr();
3426   st->print(BULLET"field type annotations:  "); fields_type_annotations()->print_value_on(st); st->cr();

3432          pv_node = pv_node->previous_versions()) {
3433       if (!have_pv)
3434         st->print(BULLET"previous version:  ");
3435       have_pv = true;
3436       pv_node->constants()->print_value_on(st);
3437     }
3438     if (have_pv) st->cr();
3439   }
3440 
3441   if (generic_signature() != NULL) {
3442     st->print(BULLET"generic signature: ");
3443     generic_signature()->print_value_on(st);
3444     st->cr();
3445   }
3446   st->print(BULLET"inner classes:     "); inner_classes()->print_value_on(st);     st->cr();
3447   st->print(BULLET"nest members:     "); nest_members()->print_value_on(st);     st->cr();
3448   if (record_components() != NULL) {
3449     st->print(BULLET"record components:     "); record_components()->print_value_on(st);     st->cr();
3450   }
3451   st->print(BULLET"permitted subclasses:     "); permitted_subclasses()->print_value_on(st);     st->cr();

3452   if (java_mirror() != NULL) {
3453     st->print(BULLET"java mirror:       ");
3454     java_mirror()->print_value_on(st);
3455     st->cr();
3456   } else {
3457     st->print_cr(BULLET"java mirror:       NULL");
3458   }
3459   st->print(BULLET"vtable length      %d  (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3460   if (vtable_length() > 0 && (Verbose || WizardMode))  print_vtable(start_of_vtable(), vtable_length(), st);
3461   st->print(BULLET"itable length      %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3462   if (itable_length() > 0 && (Verbose || WizardMode))  print_vtable(start_of_itable(), itable_length(), st);
3463   st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3464   FieldPrinter print_static_field(st);
3465   ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3466   st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3467   FieldPrinter print_nonstatic_field(st);
3468   InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3469   ik->print_nonstatic_fields(&print_nonstatic_field);
3470 
3471   st->print(BULLET"non-static oop maps: ");
3472   OopMapBlock* map     = start_of_nonstatic_oop_maps();
3473   OopMapBlock* end_map = map + nonstatic_oop_map_count();
3474   while (map < end_map) {
3475     st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3476     map++;
3477   }
3478   st->cr();
3479 }
3480 
3481 void InstanceKlass::print_value_on(outputStream* st) const {
3482   assert(is_klass(), "must be klass");

  52 #include "logging/logStream.hpp"
  53 #include "memory/allocation.inline.hpp"
  54 #include "memory/iterator.inline.hpp"
  55 #include "memory/metadataFactory.hpp"
  56 #include "memory/metaspaceClosure.hpp"
  57 #include "memory/oopFactory.hpp"
  58 #include "memory/resourceArea.hpp"
  59 #include "memory/universe.hpp"
  60 #include "oops/fieldStreams.inline.hpp"
  61 #include "oops/constantPool.hpp"
  62 #include "oops/instanceClassLoaderKlass.hpp"
  63 #include "oops/instanceKlass.inline.hpp"
  64 #include "oops/instanceMirrorKlass.hpp"
  65 #include "oops/instanceOop.hpp"
  66 #include "oops/instanceStackChunkKlass.hpp"
  67 #include "oops/klass.inline.hpp"
  68 #include "oops/method.hpp"
  69 #include "oops/oop.inline.hpp"
  70 #include "oops/recordComponent.hpp"
  71 #include "oops/symbol.hpp"
  72 #include "oops/inlineKlass.hpp"
  73 #include "prims/jvmtiExport.hpp"
  74 #include "prims/jvmtiRedefineClasses.hpp"
  75 #include "prims/jvmtiThreadState.hpp"
  76 #include "prims/methodComparator.hpp"
  77 #include "runtime/arguments.hpp"
  78 #include "runtime/atomic.hpp"
  79 #include "runtime/fieldDescriptor.inline.hpp"
  80 #include "runtime/handles.inline.hpp"
  81 #include "runtime/javaCalls.hpp"
  82 #include "runtime/javaThread.inline.hpp"
  83 #include "runtime/mutexLocker.hpp"
  84 #include "runtime/orderAccess.hpp"
  85 #include "runtime/reflectionUtils.hpp"
  86 #include "runtime/threads.hpp"
  87 #include "services/classLoadingService.hpp"
  88 #include "services/finalizerService.hpp"
  89 #include "services/threadService.hpp"
  90 #include "utilities/dtrace.hpp"
  91 #include "utilities/events.hpp"
  92 #include "utilities/macros.hpp"

 147 
 148 static inline bool is_class_loader(const Symbol* class_name,
 149                                    const ClassFileParser& parser) {
 150   assert(class_name != NULL, "invariant");
 151 
 152   if (class_name == vmSymbols::java_lang_ClassLoader()) {
 153     return true;
 154   }
 155 
 156   if (vmClasses::ClassLoader_klass_loaded()) {
 157     const Klass* const super_klass = parser.super_klass();
 158     if (super_klass != NULL) {
 159       if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
 160         return true;
 161       }
 162     }
 163   }
 164   return false;
 165 }
 166 
 167 bool InstanceKlass::field_is_null_free_inline_type(int index) const { return Signature::basic_type(field(index)->signature(constants())) == T_PRIMITIVE_OBJECT; }
 168 
 169 static inline bool is_stack_chunk_class(const Symbol* class_name,
 170                                         const ClassLoaderData* loader_data) {
 171   return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
 172           loader_data->is_the_null_class_loader_data());
 173 }
 174 
 175 // private: called to verify that k is a static member of this nest.
 176 // We know that k is an instance class in the same package and hence the
 177 // same classloader.
 178 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
 179   assert(!is_hidden(), "unexpected hidden class");
 180   if (_nest_members == NULL || _nest_members == Universe::the_empty_short_array()) {
 181     if (log_is_enabled(Trace, class, nestmates)) {
 182       ResourceMark rm(current);
 183       log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
 184                                   k->external_name(), this->external_name());
 185     }
 186     return false;
 187   }
 188 

 421   log_trace(class, nestmates)("Class %s does %shave nestmate access to %s",
 422                               this->external_name(),
 423                               access ? "" : "NOT ",
 424                               k->external_name());
 425   return access;
 426 }
 427 
 428 const char* InstanceKlass::nest_host_error() {
 429   if (_nest_host_index == 0) {
 430     return NULL;
 431   } else {
 432     constantPoolHandle cph(Thread::current(), constants());
 433     return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
 434   }
 435 }
 436 
 437 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
 438   const int size = InstanceKlass::size(parser.vtable_size(),
 439                                        parser.itable_size(),
 440                                        nonstatic_oop_map_size(parser.total_oop_map_count()),
 441                                        parser.is_interface(),
 442                                        parser.has_inline_fields() ? parser.java_fields_count() : 0,
 443                                        parser.is_inline_type());
 444 
 445   const Symbol* const class_name = parser.class_name();
 446   assert(class_name != NULL, "invariant");
 447   ClassLoaderData* loader_data = parser.loader_data();
 448   assert(loader_data != NULL, "invariant");
 449 
 450   InstanceKlass* ik;
 451 
 452   // Allocation
 453   if (parser.is_instance_ref_klass()) {
 454     // java.lang.ref.Reference
 455     ik = new (loader_data, size, THREAD) InstanceRefKlass(parser);
 456   } else if (class_name == vmSymbols::java_lang_Class()) {
 457     // mirror - java.lang.Class
 458     ik = new (loader_data, size, THREAD) InstanceMirrorKlass(parser);
 459   } else if (is_stack_chunk_class(class_name, loader_data)) {
 460     // stack chunk
 461     ik = new (loader_data, size, THREAD) InstanceStackChunkKlass(parser);
 462   } else if (is_class_loader(class_name, parser)) {
 463     // class loader - java.lang.ClassLoader
 464     ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass(parser);
 465   } else if (parser.is_inline_type()) {
 466     // inline type
 467     ik = new (loader_data, size, THREAD) InlineKlass(parser);
 468   } else {
 469     // normal
 470     ik = new (loader_data, size, THREAD) InstanceKlass(parser);
 471   }
 472 
 473   // Check for pending exception before adding to the loader data and incrementing
 474   // class count.  Can get OOM here.
 475   if (HAS_PENDING_EXCEPTION) {
 476     return NULL;
 477   }
 478 
 479 #ifdef ASSERT
 480   assert(ik->size() == size, "");
 481   ik->bounds_check((address) ik->start_of_vtable(), false, size);
 482   ik->bounds_check((address) ik->start_of_itable(), false, size);
 483   ik->bounds_check((address) ik->end_of_itable(), true, size);
 484   ik->bounds_check((address) ik->end_of_nonstatic_oop_maps(), true, size);
 485 #endif //ASSERT
 486   return ik;
 487 }
 488 
 489 #ifndef PRODUCT
 490 bool InstanceKlass::bounds_check(address addr, bool edge_ok, intptr_t size_in_bytes) const {
 491   const char* bad = NULL;
 492   address end = NULL;
 493   if (addr < (address)this) {
 494     bad = "before";
 495   } else if (addr == (address)this) {
 496     if (edge_ok)  return true;
 497     bad = "just before";
 498   } else if (addr == (end = (address)this + sizeof(intptr_t) * (size_in_bytes < 0 ? size() : size_in_bytes))) {
 499     if (edge_ok)  return true;
 500     bad = "just after";
 501   } else if (addr > end) {
 502     bad = "after";
 503   } else {
 504     return true;
 505   }
 506   tty->print_cr("%s object bounds: " INTPTR_FORMAT " [" INTPTR_FORMAT ".." INTPTR_FORMAT "]",
 507       bad, (intptr_t)addr, (intptr_t)this, (intptr_t)end);
 508   Verbose = WizardMode = true; this->print(); //@@
 509   return false;
 510 }
 511 #endif //PRODUCT
 512 
 513 // copy method ordering from resource area to Metaspace
 514 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
 515   if (m != NULL) {
 516     // allocate a new array and copy contents (memcpy?)
 517     _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
 518     for (int i = 0; i < m->length(); i++) {
 519       _method_ordering->at_put(i, m->at(i));
 520     }
 521   } else {
 522     _method_ordering = Universe::the_empty_int_array();
 523   }
 524 }
 525 
 526 // create a new array of vtable_indices for default methods
 527 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
 528   Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
 529   assert(default_vtable_indices() == NULL, "only create once");
 530   set_default_vtable_indices(vtable_indices);
 531   return vtable_indices;
 532 }
 533 
 534 static Monitor* create_init_monitor(const char* name) {
 535   return new Monitor(Mutex::safepoint, name);
 536 }
 537 
 538 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
 539   Klass(kind),
 540   _nest_members(NULL),
 541   _nest_host(NULL),
 542   _permitted_subclasses(NULL),
 543   _record_components(NULL),
 544   _static_field_size(parser.static_field_size()),
 545   _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
 546   _itable_len(parser.itable_size()),
 547   _nest_host_index(0),
 548   _init_state(allocated),
 549   _reference_type(reference_type),
 550   _init_monitor(create_init_monitor("InstanceKlassInitMonitor_lock")),
 551   _init_thread(NULL),
 552   _inline_type_field_klasses(NULL),
 553   _preload_classes(NULL),
 554   _adr_inlineklass_fixed_block(NULL)
 555 {
 556   set_vtable_length(parser.vtable_size());
 557   set_access_flags(parser.access_flags());
 558   if (parser.is_hidden()) set_is_hidden();
 559   set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
 560                                                     false));
 561     if (parser.has_inline_fields()) {
 562       set_has_inline_type_fields();
 563     }
 564     _java_fields_count = parser.java_fields_count();
 565 
 566   assert(NULL == _methods, "underlying memory not zeroed?");
 567   assert(is_instance_klass(), "is layout incorrect?");
 568   assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
 569 
 570   if (has_inline_type_fields()) {
 571     _inline_type_field_klasses = (const Klass**) adr_inline_type_field_klasses();
 572   }
 573 }
 574 
 575 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
 576                                        Array<Method*>* methods) {
 577   if (methods != NULL && methods != Universe::the_empty_method_array() &&
 578       !methods->is_shared()) {
 579     for (int i = 0; i < methods->length(); i++) {
 580       Method* method = methods->at(i);
 581       if (method == NULL) continue;  // maybe null if error processing
 582       // Only want to delete methods that are not executing for RedefineClasses.
 583       // The previous version will point to them so they're not totally dangling
 584       assert (!method->on_stack(), "shouldn't be called with methods on stack");
 585       MetadataFactory::free_metadata(loader_data, method);
 586     }
 587     MetadataFactory::free_array<Method*>(loader_data, methods);
 588   }
 589 }
 590 
 591 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data,
 592                                           const Klass* super_klass,

 717       inner_classes() != Universe::the_empty_short_array() &&
 718       !inner_classes()->is_shared()) {
 719     MetadataFactory::free_array<jushort>(loader_data, inner_classes());
 720   }
 721   set_inner_classes(NULL);
 722 
 723   if (nest_members() != NULL &&
 724       nest_members() != Universe::the_empty_short_array() &&
 725       !nest_members()->is_shared()) {
 726     MetadataFactory::free_array<jushort>(loader_data, nest_members());
 727   }
 728   set_nest_members(NULL);
 729 
 730   if (permitted_subclasses() != NULL &&
 731       permitted_subclasses() != Universe::the_empty_short_array() &&
 732       !permitted_subclasses()->is_shared()) {
 733     MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
 734   }
 735   set_permitted_subclasses(NULL);
 736 
 737   if (preload_classes() != NULL &&
 738       preload_classes() != Universe::the_empty_short_array() &&
 739       !preload_classes()->is_shared()) {
 740     MetadataFactory::free_array<jushort>(loader_data, preload_classes());
 741   }
 742 
 743   // We should deallocate the Annotations instance if it's not in shared spaces.
 744   if (annotations() != NULL && !annotations()->is_shared()) {
 745     MetadataFactory::free_metadata(loader_data, annotations());
 746   }
 747   set_annotations(NULL);
 748 
 749   SystemDictionaryShared::handle_class_unloading(this);
 750 }
 751 
 752 bool InstanceKlass::is_record() const {
 753   return _record_components != NULL &&
 754          is_final() &&
 755          java_super() == vmClasses::Record_klass();
 756 }
 757 
 758 bool InstanceKlass::is_sealed() const {
 759   return _permitted_subclasses != NULL &&
 760          _permitted_subclasses != Universe::the_empty_short_array();
 761 }
 762 

 873         vmSymbols::java_lang_IncompatibleClassChangeError(),
 874         "class %s has interface %s as super class",
 875         external_name(),
 876         super_klass->external_name()
 877       );
 878       return false;
 879     }
 880 
 881     InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
 882     ik_super->link_class_impl(CHECK_false);
 883   }
 884 
 885   // link all interfaces implemented by this class before linking this class
 886   Array<InstanceKlass*>* interfaces = local_interfaces();
 887   int num_interfaces = interfaces->length();
 888   for (int index = 0; index < num_interfaces; index++) {
 889     InstanceKlass* interk = interfaces->at(index);
 890     interk->link_class_impl(CHECK_false);
 891   }
 892 
 893 
 894   // If a class declares a method that uses an inline class as an argument
 895   // type or return inline type, this inline class must be loaded during the
 896   // linking of this class because size and properties of the inline class
 897   // must be known in order to be able to perform inline type optimizations.
 898   // The implementation below is an approximation of this rule, the code
 899   // iterates over all methods of the current class (including overridden
 900   // methods), not only the methods declared by this class. This
 901   // approximation makes the code simpler, and doesn't change the semantic
 902   // because classes declaring methods overridden by the current class are
 903   // linked (and have performed their own pre-loading) before the linking
 904   // of the current class.
 905 
 906 
 907   // Note:
 908   // Inline class types are loaded during
 909   // the loading phase (see ClassFileParser::post_process_parsed_stream()).
 910   // Inline class types used as element types for array creation
 911   // are not pre-loaded. Their loading is triggered by either anewarray
 912   // or multianewarray bytecodes.
 913 
 914   // Could it be possible to do the following processing only if the
 915   // class uses inline types?
 916   if (EnableValhalla) {
 917     ResourceMark rm(THREAD);
 918     if (EnablePrimitiveClasses) {
 919       for (int i = 0; i < methods()->length(); i++) {
 920         Method* m = methods()->at(i);
 921         for (SignatureStream ss(m->signature()); !ss.is_done(); ss.next()) {
 922           if (ss.is_reference()) {
 923             if (ss.is_array()) {
 924               continue;
 925             }
 926             if (ss.type() == T_PRIMITIVE_OBJECT) {
 927               Symbol* symb = ss.as_symbol();
 928               if (symb == name()) continue;
 929               oop loader = class_loader();
 930               oop protection_domain = this->protection_domain();
 931               Klass* klass = SystemDictionary::resolve_or_fail(symb,
 932                                                               Handle(THREAD, loader), Handle(THREAD, protection_domain), true,
 933                                                               CHECK_false);
 934               if (klass == NULL) {
 935                 THROW_(vmSymbols::java_lang_LinkageError(), false);
 936               }
 937               if (!klass->is_inline_klass()) {
 938                 Exceptions::fthrow(
 939                   THREAD_AND_LOCATION,
 940                   vmSymbols::java_lang_IncompatibleClassChangeError(),
 941                   "class %s is not an inline type",
 942                   klass->external_name());
 943               }
 944             }
 945           }
 946         }
 947       }
 948     }
 949     // Aggressively preloading all classes from the Preload attribute
 950     if (preload_classes() != NULL) {
 951       for (int i = 0; i < preload_classes()->length(); i++) {
 952         if (constants()->tag_at(preload_classes()->at(i)).is_klass()) continue;
 953         Symbol* class_name = constants()->klass_at_noresolve(preload_classes()->at(i));
 954         if (class_name == name()) continue;
 955         oop loader = class_loader();
 956         oop protection_domain = this->protection_domain();
 957         Klass* klass = SystemDictionary::resolve_or_null(class_name,
 958                                                           Handle(THREAD, loader), Handle(THREAD, protection_domain), THREAD);
 959         if (HAS_PENDING_EXCEPTION) {
 960           CLEAR_PENDING_EXCEPTION;
 961         }
 962         if (klass != NULL) {
 963           log_info(class, preload)("Preloading class %s during linking of class %s because of its Preload attribute", class_name->as_C_string(), name()->as_C_string());
 964         } else {
 965           log_warning(class, preload)("Preloading of class %s during linking of class %s (Preload attribute) failed", class_name->as_C_string(), name()->as_C_string());
 966         }
 967       }
 968     }
 969   }
 970 
 971   // in case the class is linked in the process of linking its superclasses
 972   if (is_linked()) {
 973     return true;
 974   }
 975 
 976   // trace only the link time for this klass that includes
 977   // the verification time
 978   PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
 979                              ClassLoader::perf_class_link_selftime(),
 980                              ClassLoader::perf_classes_linked(),
 981                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 982                              jt->get_thread_stat()->perf_timers_addr(),
 983                              PerfClassTraceTime::CLASS_LINK);
 984 
 985   // verification & rewriting
 986   {
 987     LockLinkState init_lock(this, jt);
 988 
 989     // rewritten will have been set if loader constraint error found
 990     // on an earlier link attempt

1195       set_init_thread(jt);
1196     }
1197   }
1198 
1199   // Throw error outside lock
1200   if (throw_error) {
1201     DTRACE_CLASSINIT_PROBE_WAIT(erroneous, -1, wait);
1202     ResourceMark rm(THREAD);
1203     Handle cause(THREAD, get_initialization_error(THREAD));
1204 
1205     stringStream ss;
1206     ss.print("Could not initialize class %s", external_name());
1207     if (cause.is_null()) {
1208       THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1209     } else {
1210       THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1211                       ss.as_string(), cause);
1212     }
1213   }
1214 
1215   // Pre-allocating an instance of the default value
1216   if (is_inline_klass()) {
1217       InlineKlass* vk = InlineKlass::cast(this);
1218       oop val = vk->allocate_instance(THREAD);
1219       if (HAS_PENDING_EXCEPTION) {
1220           Handle e(THREAD, PENDING_EXCEPTION);
1221           CLEAR_PENDING_EXCEPTION;
1222           {
1223               EXCEPTION_MARK;
1224               add_initialization_error(THREAD, e);
1225               // Locks object, set state, and notify all waiting threads
1226               set_initialization_state_and_notify(initialization_error, THREAD);
1227               CLEAR_PENDING_EXCEPTION;
1228           }
1229           THROW_OOP(e());
1230       }
1231       vk->set_default_value(val);
1232   }
1233 
1234   // Step 7
1235   // Next, if C is a class rather than an interface, initialize it's super class and super
1236   // interfaces.
1237   if (!is_interface()) {
1238     Klass* super_klass = super();
1239     if (super_klass != NULL && super_klass->should_be_initialized()) {
1240       super_klass->initialize(THREAD);
1241     }
1242     // If C implements any interface that declares a non-static, concrete method,
1243     // the initialization of C triggers initialization of its super interfaces.
1244     // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1245     // having a superinterface that declares, non-static, concrete methods
1246     if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1247       initialize_super_interfaces(THREAD);
1248     }
1249 
1250     // If any exceptions, complete abruptly, throwing the same exception as above.
1251     if (HAS_PENDING_EXCEPTION) {
1252       Handle e(THREAD, PENDING_EXCEPTION);
1253       CLEAR_PENDING_EXCEPTION;
1254       {
1255         EXCEPTION_MARK;
1256         add_initialization_error(THREAD, e);
1257         // Locks object, set state, and notify all waiting threads
1258         set_initialization_state_and_notify(initialization_error, THREAD);
1259         CLEAR_PENDING_EXCEPTION;
1260       }
1261       DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1262       THROW_OOP(e());
1263     }
1264   }
1265 

1266   // Step 8
1267   // Initialize classes of inline fields
1268   if (EnablePrimitiveClasses) {
1269     for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1270       if (Signature::basic_type(fs.signature()) == T_PRIMITIVE_OBJECT) {
1271         Klass* klass = get_inline_type_field_klass_or_null(fs.index());
1272         if (fs.access_flags().is_static() && klass == NULL) {
1273           klass = SystemDictionary::resolve_or_fail(field_signature(fs.index())->fundamental_name(THREAD),
1274               Handle(THREAD, class_loader()),
1275               Handle(THREAD, protection_domain()),
1276               true, THREAD);
1277           set_inline_type_field_klass(fs.index(), klass);
1278         }
1279 
1280         if (!HAS_PENDING_EXCEPTION) {
1281           assert(klass != NULL, "Must  be");
1282           InstanceKlass::cast(klass)->initialize(THREAD);
1283           if (fs.access_flags().is_static()) {
1284             if (java_mirror()->obj_field(fs.offset()) == NULL) {
1285               java_mirror()->obj_field_put(fs.offset(), InlineKlass::cast(klass)->default_value());
1286             }
1287           }
1288         }
1289 
1290         if (HAS_PENDING_EXCEPTION) {
1291           Handle e(THREAD, PENDING_EXCEPTION);
1292           CLEAR_PENDING_EXCEPTION;
1293           {
1294             EXCEPTION_MARK;
1295             add_initialization_error(THREAD, e);
1296             // Locks object, set state, and notify all waiting threads
1297             set_initialization_state_and_notify(initialization_error, THREAD);
1298             CLEAR_PENDING_EXCEPTION;
1299           }
1300           THROW_OOP(e());
1301         }
1302       }
1303     }
1304   }
1305 
1306 
1307   // Step 9
1308   {
1309     DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1310     if (class_initializer() != NULL) {
1311       // Timer includes any side effects of class initialization (resolution,
1312       // etc), but not recursive entry into call_class_initializer().
1313       PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1314                                ClassLoader::perf_class_init_selftime(),
1315                                ClassLoader::perf_classes_inited(),
1316                                jt->get_thread_stat()->perf_recursion_counts_addr(),
1317                                jt->get_thread_stat()->perf_timers_addr(),
1318                                PerfClassTraceTime::CLASS_CLINIT);
1319       call_class_initializer(THREAD);
1320     } else {
1321       // The elapsed time is so small it's not worth counting.
1322       if (UsePerfData) {
1323         ClassLoader::perf_classes_inited()->inc();
1324       }
1325       call_class_initializer(THREAD);
1326     }
1327   }
1328 
1329   // Step 10
1330   if (!HAS_PENDING_EXCEPTION) {
1331     set_initialization_state_and_notify(fully_initialized, THREAD);
1332     debug_only(vtable().verify(tty, true);)
1333   }
1334   else {
1335     // Step 11 and 12
1336     Handle e(THREAD, PENDING_EXCEPTION);
1337     CLEAR_PENDING_EXCEPTION;
1338     // JVMTI has already reported the pending exception
1339     // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1340     JvmtiExport::clear_detected_exception(jt);
1341     {
1342       EXCEPTION_MARK;
1343       add_initialization_error(THREAD, e);
1344       set_initialization_state_and_notify(initialization_error, THREAD);
1345       CLEAR_PENDING_EXCEPTION;   // ignore any exception thrown, class initialization error is thrown below
1346       // JVMTI has already reported the pending exception
1347       // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1348       JvmtiExport::clear_detected_exception(jt);
1349     }
1350     DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1351     if (e->is_a(vmClasses::Error_klass())) {
1352       THROW_OOP(e());
1353     } else {
1354       JavaCallArguments args(e);
1355       THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),

1584               : vmSymbols::java_lang_InstantiationException(), external_name());
1585   }
1586   if (this == vmClasses::Class_klass()) {
1587     ResourceMark rm(THREAD);
1588     THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1589               : vmSymbols::java_lang_IllegalAccessException(), external_name());
1590   }
1591 }
1592 
1593 Klass* InstanceKlass::array_klass(int n, TRAPS) {
1594   // Need load-acquire for lock-free read
1595   if (array_klasses_acquire() == NULL) {
1596     ResourceMark rm(THREAD);
1597     JavaThread *jt = THREAD;
1598     {
1599       // Atomic creation of array_klasses
1600       MutexLocker ma(THREAD, MultiArray_lock);
1601 
1602       // Check if update has already taken place
1603       if (array_klasses() == NULL) {
1604         ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this,
1605                                                                   false, false, CHECK_NULL);
1606         // use 'release' to pair with lock-free load
1607         release_set_array_klasses(k);
1608       }
1609     }
1610   }
1611   // array_klasses() will always be set at this point
1612   ArrayKlass* ak = array_klasses();
1613   return ak->array_klass(n, THREAD);
1614 }
1615 
1616 Klass* InstanceKlass::array_klass_or_null(int n) {
1617   // Need load-acquire for lock-free read
1618   ArrayKlass* ak = array_klasses_acquire();
1619   if (ak == NULL) {
1620     return NULL;
1621   } else {
1622     return ak->array_klass_or_null(n);
1623   }
1624 }
1625 
1626 Klass* InstanceKlass::array_klass(TRAPS) {
1627   return array_klass(1, THREAD);
1628 }
1629 
1630 Klass* InstanceKlass::array_klass_or_null() {
1631   return array_klass_or_null(1);
1632 }
1633 
1634 static int call_class_initializer_counter = 0;   // for debugging
1635 
1636 Method* InstanceKlass::class_initializer() const {
1637   Method* clinit = find_method(
1638       vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1639   if (clinit != NULL && clinit->is_class_initializer()) {
1640     return clinit;
1641   }
1642   return NULL;
1643 }
1644 
1645 void InstanceKlass::call_class_initializer(TRAPS) {
1646   if (ReplayCompiles &&
1647       (ReplaySuppressInitializers == 1 ||
1648        (ReplaySuppressInitializers >= 2 && class_loader() != NULL))) {
1649     // Hide the existence of the initializer for the purpose of replaying the compile
1650     return;
1651   }
1652 
1653 #if INCLUDE_CDS
1654   // This is needed to ensure the consistency of the archived heap objects.
1655   if (has_archived_enum_objs()) {
1656     assert(is_shared(), "must be");
1657     bool initialized = HeapShared::initialize_enum_klass(this, CHECK);
1658     if (initialized) {
1659       return;

1668     ResourceMark rm(THREAD);
1669     LogStream ls(lt);
1670     ls.print("%d Initializing ", call_class_initializer_counter++);
1671     name()->print_value_on(&ls);
1672     ls.print_cr("%s (" PTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", p2i(this));
1673   }
1674   if (h_method() != NULL) {
1675     JavaCallArguments args; // No arguments
1676     JavaValue result(T_VOID);
1677     JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
1678   }
1679 }
1680 
1681 
1682 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1683   InterpreterOopMap* entry_for) {
1684   // Lazily create the _oop_map_cache at first request
1685   // Lock-free access requires load_acquire.
1686   OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1687   if (oop_map_cache == NULL) {
1688     MutexLocker x(OopMapCacheAlloc_lock,  Mutex::_no_safepoint_check_flag);
1689     // Check if _oop_map_cache was allocated while we were waiting for this lock
1690     if ((oop_map_cache = _oop_map_cache) == NULL) {
1691       oop_map_cache = new OopMapCache();
1692       // Ensure _oop_map_cache is stable, since it is examined without a lock
1693       Atomic::release_store(&_oop_map_cache, oop_map_cache);
1694     }
1695   }
1696   // _oop_map_cache is constant after init; lookup below does its own locking.
1697   oop_map_cache->lookup(method, bci, entry_for);
1698 }
1699 





1700 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1701   for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1702     Symbol* f_name = fs.name();
1703     Symbol* f_sig  = fs.signature();
1704     if (f_name == name && f_sig == sig) {
1705       fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1706       return true;
1707     }
1708   }
1709   return false;
1710 }
1711 
1712 
1713 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1714   const int n = local_interfaces()->length();
1715   for (int i = 0; i < n; i++) {
1716     Klass* intf1 = local_interfaces()->at(i);
1717     assert(intf1->is_interface(), "just checking type");
1718     // search for field in current interface
1719     if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) {

1750 
1751 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1752   // search order according to newest JVM spec (5.4.3.2, p.167).
1753   // 1) search for field in current klass
1754   if (find_local_field(name, sig, fd)) {
1755     if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1756   }
1757   // 2) search for field recursively in direct superinterfaces
1758   if (is_static) {
1759     Klass* intf = find_interface_field(name, sig, fd);
1760     if (intf != NULL) return intf;
1761   }
1762   // 3) apply field lookup recursively if superclass exists
1763   { Klass* supr = super();
1764     if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1765   }
1766   // 4) otherwise field lookup fails
1767   return NULL;
1768 }
1769 
1770 bool InstanceKlass::contains_field_offset(int offset) {
1771   if (this->is_inline_klass()) {
1772     InlineKlass* vk = InlineKlass::cast(this);
1773     return offset >= vk->first_field_offset() && offset < (vk->first_field_offset() + vk->get_exact_size_in_bytes());
1774   } else {
1775     fieldDescriptor fd;
1776     return find_field_from_offset(offset, false, &fd);
1777   }
1778 }
1779 
1780 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1781   for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1782     if (fs.offset() == offset) {
1783       fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1784       if (fd->is_static() == is_static) return true;
1785     }
1786   }
1787   return false;
1788 }
1789 
1790 
1791 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1792   Klass* klass = const_cast<InstanceKlass*>(this);
1793   while (klass != NULL) {
1794     if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1795       return true;
1796     }
1797     klass = klass->super();
1798   }

2151 }
2152 
2153 // uncached_lookup_method searches both the local class methods array and all
2154 // superclasses methods arrays, skipping any overpass methods in superclasses,
2155 // and possibly skipping private methods.
2156 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2157                                               const Symbol* signature,
2158                                               OverpassLookupMode overpass_mode,
2159                                               PrivateLookupMode private_mode) const {
2160   OverpassLookupMode overpass_local_mode = overpass_mode;
2161   const Klass* klass = this;
2162   while (klass != NULL) {
2163     Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2164                                                                         signature,
2165                                                                         overpass_local_mode,
2166                                                                         StaticLookupMode::find,
2167                                                                         private_mode);
2168     if (method != NULL) {
2169       return method;
2170     }
2171     if (name == vmSymbols::object_initializer_name() ||
2172         name == vmSymbols::inline_factory_name()) {
2173       break;  // <init> and <vnew> is never inherited
2174     }
2175     klass = klass->super();
2176     overpass_local_mode = OverpassLookupMode::skip;   // Always ignore overpass methods in superclasses
2177   }
2178   return NULL;
2179 }
2180 
2181 #ifdef ASSERT
2182 // search through class hierarchy and return true if this class or
2183 // one of the superclasses was redefined
2184 bool InstanceKlass::has_redefined_this_or_super() const {
2185   const Klass* klass = this;
2186   while (klass != NULL) {
2187     if (InstanceKlass::cast(klass)->has_been_redefined()) {
2188       return true;
2189     }
2190     klass = klass->super();
2191   }
2192   return false;
2193 }
2194 #endif

2618   if (itable_length() > 0) {
2619     itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable();
2620     int method_table_offset_in_words = ioe->offset()/wordSize;
2621     int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words())
2622                          / itableOffsetEntry::size();
2623 
2624     for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2625       if (ioe->interface_klass() != NULL) {
2626         it->push(ioe->interface_klass_addr());
2627         itableMethodEntry* ime = ioe->first_method_entry(this);
2628         int n = klassItable::method_count_for_interface(ioe->interface_klass());
2629         for (int index = 0; index < n; index ++) {
2630           it->push(ime[index].method_addr());
2631         }
2632       }
2633     }
2634   }
2635 
2636   it->push(&_nest_members);
2637   it->push(&_permitted_subclasses);
2638   it->push(&_preload_classes);
2639   it->push(&_record_components);
2640 
2641   if (has_inline_type_fields()) {
2642     for (int i = 0; i < java_fields_count(); i++) {
2643       it->push(&((Klass**)adr_inline_type_field_klasses())[i]);
2644     }
2645   }
2646 }
2647 
2648 #if INCLUDE_CDS
2649 void InstanceKlass::remove_unshareable_info() {
2650 
2651   if (is_linked()) {
2652     assert(can_be_verified_at_dumptime(), "must be");
2653     // Remember this so we can avoid walking the hierarchy at runtime.
2654     set_verified_at_dump_time();
2655   }
2656 
2657   Klass::remove_unshareable_info();
2658 
2659   if (SystemDictionaryShared::has_class_failed_verification(this)) {
2660     // Classes are attempted to link during dumping and may fail,
2661     // but these classes are still in the dictionary and class list in CLD.
2662     // If the class has failed verification, there is nothing else to remove.
2663     return;
2664   }
2665 

2669   // being added to class hierarchy (see SystemDictionary:::add_to_hierarchy()).
2670   _init_state = allocated;
2671 
2672   { // Otherwise this needs to take out the Compile_lock.
2673     assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2674     init_implementor();
2675   }
2676 
2677   constants()->remove_unshareable_info();
2678 
2679   for (int i = 0; i < methods()->length(); i++) {
2680     Method* m = methods()->at(i);
2681     m->remove_unshareable_info();
2682   }
2683 
2684   // do array classes also.
2685   if (array_klasses() != NULL) {
2686     array_klasses()->remove_unshareable_info();
2687   }
2688 
2689   if (has_inline_type_fields()) {
2690     for (AllFieldStream fs(fields(), constants()); !fs.done(); fs.next()) {
2691       if (Signature::basic_type(fs.signature()) == T_PRIMITIVE_OBJECT) {
2692         reset_inline_type_field_klass(fs.index());
2693       }
2694     }
2695   }
2696 
2697   // These are not allocated from metaspace. They are safe to set to NULL.
2698   _source_debug_extension = NULL;
2699   _dep_context = NULL;
2700   _osr_nmethods_head = NULL;
2701 #if INCLUDE_JVMTI
2702   _breakpoints = NULL;
2703   _previous_versions = NULL;
2704   _cached_class_file = NULL;
2705   _jvmti_cached_class_field_map = NULL;
2706 #endif
2707 
2708   _init_thread = NULL;
2709   _methods_jmethod_ids = NULL;
2710   _jni_ids = NULL;
2711   _oop_map_cache = NULL;
2712   // clear _nest_host to ensure re-load at runtime
2713   _nest_host = NULL;
2714   init_shared_package_entry();
2715   _dep_context_last_cleaned = 0;
2716   _init_monitor = NULL;

2739     if (is_shared_unregistered_class()) {
2740       _package_entry = NULL;
2741     } else {
2742       _package_entry = PackageEntry::get_archived_entry(_package_entry);
2743     }
2744   }
2745   ArchivePtrMarker::mark_pointer((address**)&_package_entry);
2746 #endif
2747 }
2748 
2749 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2750                                              PackageEntry* pkg_entry, TRAPS) {
2751   // SystemDictionary::add_to_hierarchy() sets the init_state to loaded
2752   // before the InstanceKlass is added to the SystemDictionary. Make
2753   // sure the current state is <loaded.
2754   assert(!is_loaded(), "invalid init state");
2755   assert(!shared_loading_failed(), "Must not try to load failed class again");
2756   set_package(loader_data, pkg_entry, CHECK);
2757   Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2758 
2759   if (is_inline_klass()) {
2760     InlineKlass::cast(this)->initialize_calling_convention(CHECK);
2761   }
2762 
2763   Array<Method*>* methods = this->methods();
2764   int num_methods = methods->length();
2765   for (int index = 0; index < num_methods; ++index) {
2766     methods->at(index)->restore_unshareable_info(CHECK);
2767   }
2768 #if INCLUDE_JVMTI
2769   if (JvmtiExport::has_redefined_a_class()) {
2770     // Reinitialize vtable because RedefineClasses may have changed some
2771     // entries in this vtable for super classes so the CDS vtable might
2772     // point to old or obsolete entries.  RedefineClasses doesn't fix up
2773     // vtables in the shared system dictionary, only the main one.
2774     // It also redefines the itable too so fix that too.
2775     // First fix any default methods that point to a super class that may
2776     // have been redefined.
2777     bool trace_name_printed = false;
2778     adjust_default_methods(&trace_name_printed);
2779     vtable().initialize_vtable();
2780     itable().initialize_itable();
2781   }
2782 #endif

2925 
2926 void InstanceKlass::set_source_debug_extension(const char* array, int length) {
2927   if (array == NULL) {
2928     _source_debug_extension = NULL;
2929   } else {
2930     // Adding one to the attribute length in order to store a null terminator
2931     // character could cause an overflow because the attribute length is
2932     // already coded with an u4 in the classfile, but in practice, it's
2933     // unlikely to happen.
2934     assert((length+1) > length, "Overflow checking");
2935     char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
2936     for (int i = 0; i < length; i++) {
2937       sde[i] = array[i];
2938     }
2939     sde[length] = '\0';
2940     _source_debug_extension = sde;
2941   }
2942 }
2943 
2944 const char* InstanceKlass::signature_name() const {
2945   return signature_name_of_carrier(JVM_SIGNATURE_CLASS);
2946 }
2947 
2948 const char* InstanceKlass::signature_name_of_carrier(char c) const {
2949   // Get the internal name as a c string
2950   const char* src = (const char*) (name()->as_C_string());
2951   const int src_length = (int)strlen(src);
2952 
2953   char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
2954 
2955   // Add L or Q as type indicator
2956   int dest_index = 0;
2957   dest[dest_index++] = c;
2958 
2959   // Add the actual class name
2960   for (int src_index = 0; src_index < src_length; ) {
2961     dest[dest_index++] = src[src_index++];
2962   }
2963 
2964   if (is_hidden()) { // Replace the last '+' with a '.'.
2965     for (int index = (int)src_length; index > 0; index--) {
2966       if (dest[index] == '+') {
2967         dest[index] = JVM_SIGNATURE_DOT;
2968         break;
2969       }
2970     }
2971   }
2972 
2973   // Add the semicolon and the NULL
2974   dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
2975   dest[dest_index] = '\0';
2976   return dest;
2977 }

3279 jint InstanceKlass::compute_modifier_flags() const {
3280   jint access = access_flags().as_int();
3281 
3282   // But check if it happens to be member class.
3283   InnerClassesIterator iter(this);
3284   for (; !iter.done(); iter.next()) {
3285     int ioff = iter.inner_class_info_index();
3286     // Inner class attribute can be zero, skip it.
3287     // Strange but true:  JVM spec. allows null inner class refs.
3288     if (ioff == 0) continue;
3289 
3290     // only look at classes that are already loaded
3291     // since we are looking for the flags for our self.
3292     Symbol* inner_name = constants()->klass_name_at(ioff);
3293     if (name() == inner_name) {
3294       // This is really a member class.
3295       access = iter.inner_access_flags();
3296       break;
3297     }
3298   }
3299   return (access & JVM_ACC_WRITTEN_FLAGS);

3300 }
3301 
3302 jint InstanceKlass::jvmti_class_status() const {
3303   jint result = 0;
3304 
3305   if (is_linked()) {
3306     result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3307   }
3308 
3309   if (is_initialized()) {
3310     assert(is_linked(), "Class status is not consistent");
3311     result |= JVMTI_CLASS_STATUS_INITIALIZED;
3312   }
3313   if (is_in_error_state()) {
3314     result |= JVMTI_CLASS_STATUS_ERROR;
3315   }
3316   return result;
3317 }
3318 
3319 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {

3536     }
3537     osr = osr->osr_link();
3538   }
3539 
3540   assert(match_level == false || best == NULL, "shouldn't pick up anything if match_level is set");
3541   if (best != NULL && best->comp_level() >= comp_level) {
3542     return best;
3543   }
3544   return NULL;
3545 }
3546 
3547 // -----------------------------------------------------------------------------------------------------
3548 // Printing
3549 
3550 #define BULLET  " - "
3551 
3552 static const char* state_names[] = {
3553   "allocated", "loaded", "being_linked", "linked", "being_initialized", "fully_initialized", "initialization_error"
3554 };
3555 
3556 static void print_vtable(address self, intptr_t* start, int len, outputStream* st) {
3557   ResourceMark rm;
3558   int* forward_refs = NEW_RESOURCE_ARRAY(int, len);
3559   for (int i = 0; i < len; i++)  forward_refs[i] = 0;
3560   for (int i = 0; i < len; i++) {
3561     intptr_t e = start[i];
3562     st->print("%d : " INTPTR_FORMAT, i, e);
3563     if (forward_refs[i] != 0) {
3564       int from = forward_refs[i];
3565       int off = (int) start[from];
3566       st->print(" (offset %d <= [%d])", off, from);
3567     }
3568     if (MetaspaceObj::is_valid((Metadata*)e)) {
3569       st->print(" ");
3570       ((Metadata*)e)->print_value_on(st);
3571     } else if (self != NULL && e > 0 && e < 0x10000) {
3572       address location = self + e;
3573       int index = (int)((intptr_t*)location - start);
3574       st->print(" (offset %d => [%d])", (int)e, index);
3575       if (index >= 0 && index < len)
3576         forward_refs[index] = i;
3577     }
3578     st->cr();
3579   }
3580 }
3581 
3582 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3583   return print_vtable(NULL, reinterpret_cast<intptr_t*>(start), len, st);
3584 }
3585 
3586 template<typename T>
3587  static void print_array_on(outputStream* st, Array<T>* array) {
3588    if (array == NULL) { st->print_cr("NULL"); return; }
3589    array->print_value_on(st); st->cr();
3590    if (Verbose || WizardMode) {
3591      for (int i = 0; i < array->length(); i++) {
3592        st->print("%d : ", i); array->at(i)->print_value_on(st); st->cr();
3593      }
3594    }
3595  }
3596 
3597 static void print_array_on(outputStream* st, Array<int>* array) {
3598   if (array == NULL) { st->print_cr("NULL"); return; }
3599   array->print_value_on(st); st->cr();
3600   if (Verbose || WizardMode) {
3601     for (int i = 0; i < array->length(); i++) {
3602       st->print("%d : %d", i, array->at(i)); st->cr();
3603     }
3604   }
3605 }
3606 
3607 const char* InstanceKlass::init_state_name() const {
3608   return state_names[_init_state];
3609 }
3610 
3611 void InstanceKlass::print_on(outputStream* st) const {
3612   assert(is_klass(), "must be klass");
3613   Klass::print_on(st);
3614 
3615   st->print(BULLET"instance size:     %d", size_helper());                        st->cr();
3616   st->print(BULLET"klass size:        %d", size());                               st->cr();
3617   st->print(BULLET"access:            "); access_flags().print_on(st);            st->cr();
3618   st->print(BULLET"misc flags:        0x%x", _misc_status.flags());               st->cr();
3619   st->print(BULLET"state:             "); st->print_cr("%s", init_state_name());
3620   st->print(BULLET"name:              "); name()->print_value_on(st);             st->cr();
3621   st->print(BULLET"super:             "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3622   st->print(BULLET"sub:               ");
3623   Klass* sub = subklass();
3624   int n;
3625   for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) {
3626     if (n < MaxSubklassPrintSize) {
3627       sub->print_value_on(st);
3628       st->print("   ");
3629     }
3630   }
3631   if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3632   st->cr();
3633 
3634   if (is_interface()) {
3635     st->print_cr(BULLET"nof implementors:  %d", nof_implementors());
3636     if (nof_implementors() == 1) {
3637       st->print_cr(BULLET"implementor:    ");
3638       st->print("   ");
3639       implementor()->print_value_on(st);
3640       st->cr();
3641     }
3642   }
3643 
3644   st->print(BULLET"arrays:            "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3645   st->print(BULLET"methods:           "); print_array_on(st, methods());
3646   st->print(BULLET"method ordering:   "); print_array_on(st, method_ordering());
3647   st->print(BULLET"default_methods:   "); print_array_on(st, default_methods());












3648   if (default_vtable_indices() != NULL) {
3649     st->print(BULLET"default vtable indices:   "); print_array_on(st, default_vtable_indices());
3650   }
3651   st->print(BULLET"local interfaces:  "); print_array_on(st, local_interfaces());
3652   st->print(BULLET"trans. interfaces: "); print_array_on(st, transitive_interfaces());
3653   st->print(BULLET"constants:         "); constants()->print_value_on(st);         st->cr();
3654   if (class_loader_data() != NULL) {
3655     st->print(BULLET"class loader data:  ");
3656     class_loader_data()->print_value_on(st);
3657     st->cr();
3658   }
3659   if (source_file_name() != NULL) {
3660     st->print(BULLET"source file:       ");
3661     source_file_name()->print_value_on(st);
3662     st->cr();
3663   }
3664   if (source_debug_extension() != NULL) {
3665     st->print(BULLET"source debug extension:       ");
3666     st->print("%s", source_debug_extension());
3667     st->cr();
3668   }
3669   st->print(BULLET"class annotations:       "); class_annotations()->print_value_on(st); st->cr();
3670   st->print(BULLET"class type annotations:  "); class_type_annotations()->print_value_on(st); st->cr();
3671   st->print(BULLET"field annotations:       "); fields_annotations()->print_value_on(st); st->cr();
3672   st->print(BULLET"field type annotations:  "); fields_type_annotations()->print_value_on(st); st->cr();

3678          pv_node = pv_node->previous_versions()) {
3679       if (!have_pv)
3680         st->print(BULLET"previous version:  ");
3681       have_pv = true;
3682       pv_node->constants()->print_value_on(st);
3683     }
3684     if (have_pv) st->cr();
3685   }
3686 
3687   if (generic_signature() != NULL) {
3688     st->print(BULLET"generic signature: ");
3689     generic_signature()->print_value_on(st);
3690     st->cr();
3691   }
3692   st->print(BULLET"inner classes:     "); inner_classes()->print_value_on(st);     st->cr();
3693   st->print(BULLET"nest members:     "); nest_members()->print_value_on(st);     st->cr();
3694   if (record_components() != NULL) {
3695     st->print(BULLET"record components:     "); record_components()->print_value_on(st);     st->cr();
3696   }
3697   st->print(BULLET"permitted subclasses:     "); permitted_subclasses()->print_value_on(st);     st->cr();
3698   st->print(BULLET"preload classes:     "); preload_classes()->print_value_on(st); st->cr();
3699   if (java_mirror() != NULL) {
3700     st->print(BULLET"java mirror:       ");
3701     java_mirror()->print_value_on(st);
3702     st->cr();
3703   } else {
3704     st->print_cr(BULLET"java mirror:       NULL");
3705   }
3706   st->print(BULLET"vtable length      %d  (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3707   if (vtable_length() > 0 && (Verbose || WizardMode))  print_vtable(start_of_vtable(), vtable_length(), st);
3708   st->print(BULLET"itable length      %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3709   if (itable_length() > 0 && (Verbose || WizardMode))  print_vtable(NULL, start_of_itable(), itable_length(), st);
3710   st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3711   FieldPrinter print_static_field(st);
3712   ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3713   st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3714   FieldPrinter print_nonstatic_field(st);
3715   InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3716   ik->print_nonstatic_fields(&print_nonstatic_field);
3717 
3718   st->print(BULLET"non-static oop maps: ");
3719   OopMapBlock* map     = start_of_nonstatic_oop_maps();
3720   OopMapBlock* end_map = map + nonstatic_oop_map_count();
3721   while (map < end_map) {
3722     st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3723     map++;
3724   }
3725   st->cr();
3726 }
3727 
3728 void InstanceKlass::print_value_on(outputStream* st) const {
3729   assert(is_klass(), "must be klass");
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