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src/hotspot/share/oops/instanceKlass.cpp

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  46 #include "compiler/compileBroker.hpp"
  47 #include "gc/shared/collectedHeap.inline.hpp"
  48 #include "interpreter/bytecodeStream.hpp"
  49 #include "interpreter/oopMapCache.hpp"
  50 #include "interpreter/rewriter.hpp"
  51 #include "jvm.h"
  52 #include "jvmtifiles/jvmti.h"
  53 #include "klass.inline.hpp"
  54 #include "logging/log.hpp"
  55 #include "logging/logMessage.hpp"
  56 #include "logging/logStream.hpp"
  57 #include "memory/allocation.inline.hpp"
  58 #include "memory/iterator.inline.hpp"
  59 #include "memory/metadataFactory.hpp"
  60 #include "memory/metaspaceClosure.hpp"
  61 #include "memory/oopFactory.hpp"
  62 #include "memory/resourceArea.hpp"
  63 #include "memory/universe.hpp"
  64 #include "oops/constantPool.hpp"
  65 #include "oops/fieldStreams.inline.hpp"

  66 #include "oops/instanceClassLoaderKlass.hpp"
  67 #include "oops/instanceKlass.inline.hpp"
  68 #include "oops/instanceMirrorKlass.hpp"
  69 #include "oops/instanceOop.hpp"
  70 #include "oops/instanceStackChunkKlass.hpp"
  71 #include "oops/klass.inline.hpp"

  72 #include "oops/method.hpp"
  73 #include "oops/oop.inline.hpp"
  74 #include "oops/recordComponent.hpp"

  75 #include "oops/symbol.hpp"
  76 #include "prims/jvmtiExport.hpp"
  77 #include "prims/jvmtiRedefineClasses.hpp"
  78 #include "prims/jvmtiThreadState.hpp"
  79 #include "prims/methodComparator.hpp"
  80 #include "runtime/arguments.hpp"
  81 #include "runtime/atomic.hpp"
  82 #include "runtime/deoptimization.hpp"
  83 #include "runtime/fieldDescriptor.inline.hpp"
  84 #include "runtime/handles.inline.hpp"
  85 #include "runtime/javaCalls.hpp"
  86 #include "runtime/javaThread.inline.hpp"
  87 #include "runtime/mutexLocker.hpp"
  88 #include "runtime/orderAccess.hpp"
  89 #include "runtime/os.inline.hpp"
  90 #include "runtime/reflection.hpp"
  91 #include "runtime/synchronizer.hpp"
  92 #include "runtime/threads.hpp"
  93 #include "services/classLoadingService.hpp"
  94 #include "services/finalizerService.hpp"

 132 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait)     \
 133   {                                                              \
 134     char* data = nullptr;                                        \
 135     int len = 0;                                                 \
 136     Symbol* clss_name = name();                                  \
 137     if (clss_name != nullptr) {                                  \
 138       data = (char*)clss_name->bytes();                          \
 139       len = clss_name->utf8_length();                            \
 140     }                                                            \
 141     HOTSPOT_CLASS_INITIALIZATION_##type(                         \
 142       data, len, (void*)class_loader(), thread_type, wait);      \
 143   }
 144 
 145 #else //  ndef DTRACE_ENABLED
 146 
 147 #define DTRACE_CLASSINIT_PROBE(type, thread_type)
 148 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait)
 149 
 150 #endif //  ndef DTRACE_ENABLED
 151 





 152 bool InstanceKlass::_finalization_enabled = true;
 153 
 154 static inline bool is_class_loader(const Symbol* class_name,
 155                                    const ClassFileParser& parser) {
 156   assert(class_name != nullptr, "invariant");
 157 
 158   if (class_name == vmSymbols::java_lang_ClassLoader()) {
 159     return true;
 160   }
 161 
 162   if (vmClasses::ClassLoader_klass_loaded()) {
 163     const Klass* const super_klass = parser.super_klass();
 164     if (super_klass != nullptr) {
 165       if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
 166         return true;
 167       }
 168     }
 169   }
 170   return false;
 171 }
 172 













 173 static inline bool is_stack_chunk_class(const Symbol* class_name,
 174                                         const ClassLoaderData* loader_data) {
 175   return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
 176           loader_data->is_the_null_class_loader_data());
 177 }
 178 
 179 // private: called to verify that k is a static member of this nest.
 180 // We know that k is an instance class in the same package and hence the
 181 // same classloader.
 182 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
 183   assert(!is_hidden(), "unexpected hidden class");
 184   if (_nest_members == nullptr || _nest_members == Universe::the_empty_short_array()) {
 185     if (log_is_enabled(Trace, class, nestmates)) {
 186       ResourceMark rm(current);
 187       log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
 188                                   k->external_name(), this->external_name());
 189     }
 190     return false;
 191   }
 192 

 447 }
 448 
 449 const char* InstanceKlass::nest_host_error() {
 450   if (_nest_host_index == 0) {
 451     return nullptr;
 452   } else {
 453     constantPoolHandle cph(Thread::current(), constants());
 454     return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
 455   }
 456 }
 457 
 458 void* InstanceKlass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size,
 459                                   bool use_class_space, TRAPS) throw() {
 460   return Metaspace::allocate(loader_data, word_size, ClassType, use_class_space, THREAD);
 461 }
 462 
 463 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
 464   const int size = InstanceKlass::size(parser.vtable_size(),
 465                                        parser.itable_size(),
 466                                        nonstatic_oop_map_size(parser.total_oop_map_count()),
 467                                        parser.is_interface());

 468 
 469   const Symbol* const class_name = parser.class_name();
 470   assert(class_name != nullptr, "invariant");
 471   ClassLoaderData* loader_data = parser.loader_data();
 472   assert(loader_data != nullptr, "invariant");
 473 
 474   InstanceKlass* ik;
 475   const bool use_class_space = UseClassMetaspaceForAllClasses || parser.klass_needs_narrow_id();
 476 
 477   // Allocation
 478   if (parser.is_instance_ref_klass()) {
 479     // java.lang.ref.Reference
 480     ik = new (loader_data, size, use_class_space, THREAD) InstanceRefKlass(parser);
 481   } else if (class_name == vmSymbols::java_lang_Class()) {
 482     // mirror - java.lang.Class
 483     ik = new (loader_data, size, use_class_space, THREAD) InstanceMirrorKlass(parser);
 484   } else if (is_stack_chunk_class(class_name, loader_data)) {
 485     // stack chunk
 486     ik = new (loader_data, size, use_class_space, THREAD) InstanceStackChunkKlass(parser);
 487   } else if (is_class_loader(class_name, parser)) {
 488     // class loader - java.lang.ClassLoader
 489     ik = new (loader_data, size, use_class_space, THREAD) InstanceClassLoaderKlass(parser);



 490   } else {
 491     // normal
 492     ik = new (loader_data, size, use_class_space, THREAD) InstanceKlass(parser);
 493   }
 494 
 495   if (ik != nullptr && UseCompressedClassPointers && use_class_space) {
 496     assert(CompressedKlassPointers::is_encodable(ik),
 497            "Klass " PTR_FORMAT "needs a narrow Klass ID, but is not encodable", p2i(ik));
 498   }
 499 
 500   // Check for pending exception before adding to the loader data and incrementing
 501   // class count.  Can get OOM here.
 502   if (HAS_PENDING_EXCEPTION) {
 503     return nullptr;
 504   }
 505 






 506   return ik;
 507 }
 508 























 509 
 510 // copy method ordering from resource area to Metaspace
 511 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
 512   if (m != nullptr) {
 513     // allocate a new array and copy contents (memcpy?)
 514     _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
 515     for (int i = 0; i < m->length(); i++) {
 516       _method_ordering->at_put(i, m->at(i));
 517     }
 518   } else {
 519     _method_ordering = Universe::the_empty_int_array();
 520   }
 521 }
 522 
 523 // create a new array of vtable_indices for default methods
 524 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
 525   Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
 526   assert(default_vtable_indices() == nullptr, "only create once");
 527   set_default_vtable_indices(vtable_indices);
 528   return vtable_indices;
 529 }
 530 
 531 
 532 InstanceKlass::InstanceKlass() {
 533   assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
 534 }
 535 
 536 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
 537   Klass(kind),
 538   _nest_members(nullptr),
 539   _nest_host(nullptr),
 540   _permitted_subclasses(nullptr),
 541   _record_components(nullptr),
 542   _static_field_size(parser.static_field_size()),
 543   _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
 544   _itable_len(parser.itable_size()),
 545   _nest_host_index(0),
 546   _init_state(allocated),
 547   _reference_type(reference_type),
 548   _init_thread(nullptr)



 549 {
 550   set_vtable_length(parser.vtable_size());
 551   set_access_flags(parser.access_flags());
 552   if (parser.is_hidden()) set_is_hidden();
 553   set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
 554                                                     false));



 555 
 556   assert(nullptr == _methods, "underlying memory not zeroed?");
 557   assert(is_instance_klass(), "is layout incorrect?");
 558   assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
 559 }
 560 
 561 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
 562                                        Array<Method*>* methods) {
 563   if (methods != nullptr && methods != Universe::the_empty_method_array() &&
 564       !methods->is_shared()) {
 565     for (int i = 0; i < methods->length(); i++) {
 566       Method* method = methods->at(i);
 567       if (method == nullptr) continue;  // maybe null if error processing
 568       // Only want to delete methods that are not executing for RedefineClasses.
 569       // The previous version will point to them so they're not totally dangling
 570       assert (!method->on_stack(), "shouldn't be called with methods on stack");
 571       MetadataFactory::free_metadata(loader_data, method);
 572     }
 573     MetadataFactory::free_array<Method*>(loader_data, methods);
 574   }

 679 
 680   deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
 681   set_transitive_interfaces(nullptr);
 682   set_local_interfaces(nullptr);
 683 
 684   if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
 685     MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
 686   }
 687   set_fieldinfo_stream(nullptr);
 688 
 689   if (fieldinfo_search_table() != nullptr && !fieldinfo_search_table()->is_shared()) {
 690     MetadataFactory::free_array<u1>(loader_data, fieldinfo_search_table());
 691   }
 692   set_fieldinfo_search_table(nullptr);
 693 
 694   if (fields_status() != nullptr && !fields_status()->is_shared()) {
 695     MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
 696   }
 697   set_fields_status(nullptr);
 698 





 699   // If a method from a redefined class is using this constant pool, don't
 700   // delete it, yet.  The new class's previous version will point to this.
 701   if (constants() != nullptr) {
 702     assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
 703     if (!constants()->is_shared()) {
 704       MetadataFactory::free_metadata(loader_data, constants());
 705     }
 706     // Delete any cached resolution errors for the constant pool
 707     SystemDictionary::delete_resolution_error(constants());
 708 
 709     set_constants(nullptr);
 710   }
 711 
 712   if (inner_classes() != nullptr &&
 713       inner_classes() != Universe::the_empty_short_array() &&
 714       !inner_classes()->is_shared()) {
 715     MetadataFactory::free_array<jushort>(loader_data, inner_classes());
 716   }
 717   set_inner_classes(nullptr);
 718 
 719   if (nest_members() != nullptr &&
 720       nest_members() != Universe::the_empty_short_array() &&
 721       !nest_members()->is_shared()) {
 722     MetadataFactory::free_array<jushort>(loader_data, nest_members());
 723   }
 724   set_nest_members(nullptr);
 725 
 726   if (permitted_subclasses() != nullptr &&
 727       permitted_subclasses() != Universe::the_empty_short_array() &&
 728       !permitted_subclasses()->is_shared()) {
 729     MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
 730   }
 731   set_permitted_subclasses(nullptr);
 732 







 733   // We should deallocate the Annotations instance if it's not in shared spaces.
 734   if (annotations() != nullptr && !annotations()->is_shared()) {
 735     MetadataFactory::free_metadata(loader_data, annotations());
 736   }
 737   set_annotations(nullptr);
 738 
 739   SystemDictionaryShared::handle_class_unloading(this);
 740 
 741 #if INCLUDE_CDS_JAVA_HEAP
 742   if (CDSConfig::is_dumping_heap()) {
 743     HeapShared::remove_scratch_objects(this);
 744   }
 745 #endif
 746 }
 747 
 748 bool InstanceKlass::is_record() const {
 749   return _record_components != nullptr &&
 750          is_final() &&
 751          java_super() == vmClasses::Record_klass();
 752 }

 881 #ifdef ASSERT
 882   {
 883     Handle h_init_lock(THREAD, init_lock());
 884     ObjectLocker ol(h_init_lock, THREAD);
 885     assert(!is_initialized(), "sanity");
 886     assert(!is_being_initialized(), "sanity");
 887     assert(!is_in_error_state(), "sanity");
 888   }
 889 #endif
 890 
 891   set_init_thread(THREAD);
 892   set_initialization_state_and_notify(fully_initialized, CHECK);
 893 }
 894 #endif
 895 
 896 bool InstanceKlass::verify_code(TRAPS) {
 897   // 1) Verify the bytecodes
 898   return Verifier::verify(this, should_verify_class(), THREAD);
 899 }
 900 






































 901 void InstanceKlass::link_class(TRAPS) {
 902   assert(is_loaded(), "must be loaded");
 903   if (!is_linked()) {
 904     link_class_impl(CHECK);
 905   }
 906 }
 907 
 908 // Called to verify that a class can link during initialization, without
 909 // throwing a VerifyError.
 910 bool InstanceKlass::link_class_or_fail(TRAPS) {
 911   assert(is_loaded(), "must be loaded");
 912   if (!is_linked()) {
 913     link_class_impl(CHECK_false);
 914   }
 915   return is_linked();
 916 }
 917 
 918 bool InstanceKlass::link_class_impl(TRAPS) {
 919   if (CDSConfig::is_dumping_static_archive() && SystemDictionaryShared::has_class_failed_verification(this)) {
 920     // This is for CDS static dump only -- we use the in_error_state to indicate that

 952         vmSymbols::java_lang_IncompatibleClassChangeError(),
 953         "class %s has interface %s as super class",
 954         external_name(),
 955         super_klass->external_name()
 956       );
 957       return false;
 958     }
 959 
 960     InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
 961     ik_super->link_class_impl(CHECK_false);
 962   }
 963 
 964   // link all interfaces implemented by this class before linking this class
 965   Array<InstanceKlass*>* interfaces = local_interfaces();
 966   int num_interfaces = interfaces->length();
 967   for (int index = 0; index < num_interfaces; index++) {
 968     InstanceKlass* interk = interfaces->at(index);
 969     interk->link_class_impl(CHECK_false);
 970   }
 971 







 972   // in case the class is linked in the process of linking its superclasses
 973   if (is_linked()) {
 974     return true;
 975   }
 976 
 977   // trace only the link time for this klass that includes
 978   // the verification time
 979   PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
 980                              ClassLoader::perf_class_link_selftime(),
 981                              ClassLoader::perf_classes_linked(),
 982                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 983                              jt->get_thread_stat()->perf_timers_addr(),
 984                              PerfClassTraceTime::CLASS_LINK);
 985 
 986   // verification & rewriting
 987   {
 988     HandleMark hm(THREAD);
 989     Handle h_init_lock(THREAD, init_lock());
 990     ObjectLocker ol(h_init_lock, jt);
 991     // rewritten will have been set if loader constraint error found

1256       ss.print("Could not initialize class %s", external_name());
1257       if (cause.is_null()) {
1258         THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1259       } else {
1260         THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1261                         ss.as_string(), cause);
1262       }
1263     } else {
1264 
1265       // Step 6
1266       set_init_state(being_initialized);
1267       set_init_thread(jt);
1268       if (debug_logging_enabled) {
1269         ResourceMark rm(jt);
1270         log_debug(class, init)("Thread \"%s\" is initializing %s",
1271                                jt->name(), external_name());
1272       }
1273     }
1274   }
1275 





















1276   // Step 7
1277   // Next, if C is a class rather than an interface, initialize it's super class and super
1278   // interfaces.
1279   if (!is_interface()) {
1280     Klass* super_klass = super();
1281     if (super_klass != nullptr && super_klass->should_be_initialized()) {
1282       super_klass->initialize(THREAD);
1283     }
1284     // If C implements any interface that declares a non-static, concrete method,
1285     // the initialization of C triggers initialization of its super interfaces.
1286     // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1287     // having a superinterface that declares, non-static, concrete methods
1288     if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1289       initialize_super_interfaces(THREAD);
1290     }
1291 
1292     // If any exceptions, complete abruptly, throwing the same exception as above.
1293     if (HAS_PENDING_EXCEPTION) {
1294       Handle e(THREAD, PENDING_EXCEPTION);
1295       CLEAR_PENDING_EXCEPTION;
1296       {
1297         EXCEPTION_MARK;
1298         add_initialization_error(THREAD, e);
1299         // Locks object, set state, and notify all waiting threads
1300         set_initialization_state_and_notify(initialization_error, THREAD);
1301         CLEAR_PENDING_EXCEPTION;
1302       }
1303       DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1304       THROW_OOP(e());
1305     }
1306   }
1307 
1308 
1309   // Step 8
1310   {
1311     DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1312     if (class_initializer() != nullptr) {
1313       // Timer includes any side effects of class initialization (resolution,
1314       // etc), but not recursive entry into call_class_initializer().
1315       PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1316                                ClassLoader::perf_class_init_selftime(),
1317                                ClassLoader::perf_classes_inited(),
1318                                jt->get_thread_stat()->perf_recursion_counts_addr(),
1319                                jt->get_thread_stat()->perf_timers_addr(),
1320                                PerfClassTraceTime::CLASS_CLINIT);
1321       call_class_initializer(THREAD);
1322     } else {
1323       // The elapsed time is so small it's not worth counting.
1324       if (UsePerfData) {
1325         ClassLoader::perf_classes_inited()->inc();
1326       }
1327       call_class_initializer(THREAD);
1328     }






























1329   }
1330 
1331   // Step 9
1332   if (!HAS_PENDING_EXCEPTION) {
1333     set_initialization_state_and_notify(fully_initialized, CHECK);
1334     DEBUG_ONLY(vtable().verify(tty, true);)
1335     CompilationPolicy::replay_training_at_init(this, THREAD);
1336   }
1337   else {
1338     // Step 10 and 11
1339     Handle e(THREAD, PENDING_EXCEPTION);
1340     CLEAR_PENDING_EXCEPTION;
1341     // JVMTI has already reported the pending exception
1342     // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1343     JvmtiExport::clear_detected_exception(jt);
1344     {
1345       EXCEPTION_MARK;
1346       add_initialization_error(THREAD, e);
1347       set_initialization_state_and_notify(initialization_error, THREAD);
1348       CLEAR_PENDING_EXCEPTION;   // ignore any exception thrown, class initialization error is thrown below

1362   }
1363   DTRACE_CLASSINIT_PROBE_WAIT(end, -1, wait);
1364 }
1365 
1366 
1367 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) {
1368   Handle h_init_lock(THREAD, init_lock());
1369   if (h_init_lock() != nullptr) {
1370     ObjectLocker ol(h_init_lock, THREAD);
1371     set_init_thread(nullptr); // reset _init_thread before changing _init_state
1372     set_init_state(state);
1373     fence_and_clear_init_lock();
1374     ol.notify_all(CHECK);
1375   } else {
1376     assert(h_init_lock() != nullptr, "The initialization state should never be set twice");
1377     set_init_thread(nullptr); // reset _init_thread before changing _init_state
1378     set_init_state(state);
1379   }
1380 }
1381 




































































1382 // Update hierarchy. This is done before the new klass has been added to the SystemDictionary. The Compile_lock
1383 // is grabbed, to ensure that the compiler is not using the class hierarchy.
1384 void InstanceKlass::add_to_hierarchy(JavaThread* current) {
1385   assert(!SafepointSynchronize::is_at_safepoint(), "must NOT be at safepoint");
1386 
1387   DeoptimizationScope deopt_scope;
1388   {
1389     MutexLocker ml(current, Compile_lock);
1390 
1391     set_init_state(InstanceKlass::loaded);
1392     // make sure init_state store is already done.
1393     // The compiler reads the hierarchy outside of the Compile_lock.
1394     // Access ordering is used to add to hierarchy.
1395 
1396     // Link into hierarchy.
1397     append_to_sibling_list();                    // add to superklass/sibling list
1398     process_interfaces();                        // handle all "implements" declarations
1399 
1400     // Now mark all code that depended on old class hierarchy.
1401     // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)

1545   for (int i = 0; i < transitive_interfaces()->length(); i++) {
1546     if (transitive_interfaces()->at(i) == k) {
1547       return true;
1548     }
1549   }
1550   return false;
1551 }
1552 
1553 bool InstanceKlass::is_same_or_direct_interface(Klass *k) const {
1554   // Verify direct super interface
1555   if (this == k) return true;
1556   assert(k->is_interface(), "should be an interface class");
1557   for (int i = 0; i < local_interfaces()->length(); i++) {
1558     if (local_interfaces()->at(i) == k) {
1559       return true;
1560     }
1561   }
1562   return false;
1563 }
1564 
1565 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) {
1566   check_array_allocation_length(length, arrayOopDesc::max_array_length(T_OBJECT), CHECK_NULL);
1567   size_t size = objArrayOopDesc::object_size(length);
1568   ArrayKlass* ak = array_klass(n, CHECK_NULL);
1569   objArrayOop o = (objArrayOop)Universe::heap()->array_allocate(ak, size, length,
1570                                                                 /* do_zero */ true, CHECK_NULL);
1571   return o;
1572 }
1573 
1574 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) {
1575   if (TraceFinalizerRegistration) {
1576     tty->print("Registered ");
1577     i->print_value_on(tty);
1578     tty->print_cr(" (" PTR_FORMAT ") as finalizable", p2i(i));
1579   }
1580   instanceHandle h_i(THREAD, i);
1581   // Pass the handle as argument, JavaCalls::call expects oop as jobjects
1582   JavaValue result(T_VOID);
1583   JavaCallArguments args(h_i);
1584   methodHandle mh(THREAD, Universe::finalizer_register_method());
1585   JavaCalls::call(&result, mh, &args, CHECK_NULL);
1586   MANAGEMENT_ONLY(FinalizerService::on_register(h_i(), THREAD);)
1587   return h_i();
1588 }
1589 
1590 instanceOop InstanceKlass::allocate_instance(TRAPS) {
1591   assert(!is_abstract() && !is_interface(), "Should not create this object");
1592   size_t size = size_helper();  // Query before forming handle.
1593   return (instanceOop)Universe::heap()->obj_allocate(this, size, CHECK_NULL);

1621               : vmSymbols::java_lang_IllegalAccessException(), external_name());
1622   }
1623 }
1624 
1625 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1626   // Need load-acquire for lock-free read
1627   if (array_klasses_acquire() == nullptr) {
1628 
1629     // Recursively lock array allocation
1630     RecursiveLocker rl(MultiArray_lock, THREAD);
1631 
1632     // Check if another thread created the array klass while we were waiting for the lock.
1633     if (array_klasses() == nullptr) {
1634       ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, CHECK_NULL);
1635       // use 'release' to pair with lock-free load
1636       release_set_array_klasses(k);
1637     }
1638   }
1639 
1640   // array_klasses() will always be set at this point
1641   ObjArrayKlass* ak = array_klasses();
1642   assert(ak != nullptr, "should be set");
1643   return ak->array_klass(n, THREAD);
1644 }
1645 
1646 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1647   // Need load-acquire for lock-free read
1648   ObjArrayKlass* oak = array_klasses_acquire();
1649   if (oak == nullptr) {
1650     return nullptr;
1651   } else {
1652     return oak->array_klass_or_null(n);
1653   }
1654 }
1655 
1656 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1657   return array_klass(1, THREAD);
1658 }
1659 
1660 ArrayKlass* InstanceKlass::array_klass_or_null() {
1661   return array_klass_or_null(1);
1662 }
1663 
1664 static int call_class_initializer_counter = 0;   // for debugging
1665 
1666 Method* InstanceKlass::class_initializer() const {
1667   Method* clinit = find_method(
1668       vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1669   if (clinit != nullptr && clinit->has_valid_initializer_flags()) {
1670     return clinit;
1671   }
1672   return nullptr;
1673 }
1674 
1675 void InstanceKlass::call_class_initializer(TRAPS) {
1676   if (ReplayCompiles &&
1677       (ReplaySuppressInitializers == 1 ||
1678        (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1679     // Hide the existence of the initializer for the purpose of replaying the compile
1680     return;
1681   }
1682 
1683 #if INCLUDE_CDS
1684   // This is needed to ensure the consistency of the archived heap objects.
1685   if (has_aot_initialized_mirror() && CDSConfig::is_loading_heap()) {
1686     AOTClassInitializer::call_runtime_setup(THREAD, this);
1687     return;
1688   } else if (has_archived_enum_objs()) {
1689     assert(is_shared(), "must be");

1758 
1759 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1760   InterpreterOopMap* entry_for) {
1761   // Lazily create the _oop_map_cache at first request.
1762   // Load_acquire is needed to safely get instance published with CAS by another thread.
1763   OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1764   if (oop_map_cache == nullptr) {
1765     // Try to install new instance atomically.
1766     oop_map_cache = new OopMapCache();
1767     OopMapCache* other = Atomic::cmpxchg(&_oop_map_cache, (OopMapCache*)nullptr, oop_map_cache);
1768     if (other != nullptr) {
1769       // Someone else managed to install before us, ditch local copy and use the existing one.
1770       delete oop_map_cache;
1771       oop_map_cache = other;
1772     }
1773   }
1774   // _oop_map_cache is constant after init; lookup below does its own locking.
1775   oop_map_cache->lookup(method, bci, entry_for);
1776 }
1777 
1778 bool InstanceKlass::contains_field_offset(int offset) {
1779   fieldDescriptor fd;
1780   return find_field_from_offset(offset, false, &fd);
1781 }
1782 
1783 FieldInfo InstanceKlass::field(int index) const {
1784   for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1785     if (fs.index() == index) {
1786       return fs.to_FieldInfo();
1787     }
1788   }
1789   fatal("Field not found");
1790   return FieldInfo();
1791 }
1792 
1793 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1794   JavaFieldStream fs(this);
1795   if (fs.lookup(name, sig)) {
1796     assert(fs.name() == name, "name must match");
1797     assert(fs.signature() == sig, "signature must match");
1798     fd->reinitialize(const_cast<InstanceKlass*>(this), fs.to_FieldInfo());
1799     return true;
1800   }
1801   return false;

1842 
1843 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1844   // search order according to newest JVM spec (5.4.3.2, p.167).
1845   // 1) search for field in current klass
1846   if (find_local_field(name, sig, fd)) {
1847     if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1848   }
1849   // 2) search for field recursively in direct superinterfaces
1850   if (is_static) {
1851     Klass* intf = find_interface_field(name, sig, fd);
1852     if (intf != nullptr) return intf;
1853   }
1854   // 3) apply field lookup recursively if superclass exists
1855   { Klass* supr = super();
1856     if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1857   }
1858   // 4) otherwise field lookup fails
1859   return nullptr;
1860 }
1861 









1862 
1863 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1864   for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1865     if (fs.offset() == offset) {
1866       fd->reinitialize(const_cast<InstanceKlass*>(this), fs.to_FieldInfo());
1867       if (fd->is_static() == is_static) return true;
1868     }
1869   }
1870   return false;
1871 }
1872 
1873 
1874 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1875   Klass* klass = const_cast<InstanceKlass*>(this);
1876   while (klass != nullptr) {
1877     if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1878       return true;
1879     }
1880     klass = klass->super();
1881   }

2225 }
2226 
2227 // uncached_lookup_method searches both the local class methods array and all
2228 // superclasses methods arrays, skipping any overpass methods in superclasses,
2229 // and possibly skipping private methods.
2230 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2231                                               const Symbol* signature,
2232                                               OverpassLookupMode overpass_mode,
2233                                               PrivateLookupMode private_mode) const {
2234   OverpassLookupMode overpass_local_mode = overpass_mode;
2235   const Klass* klass = this;
2236   while (klass != nullptr) {
2237     Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2238                                                                         signature,
2239                                                                         overpass_local_mode,
2240                                                                         StaticLookupMode::find,
2241                                                                         private_mode);
2242     if (method != nullptr) {
2243       return method;
2244     }



2245     klass = klass->super();
2246     overpass_local_mode = OverpassLookupMode::skip;   // Always ignore overpass methods in superclasses
2247   }
2248   return nullptr;
2249 }
2250 
2251 #ifdef ASSERT
2252 // search through class hierarchy and return true if this class or
2253 // one of the superclasses was redefined
2254 bool InstanceKlass::has_redefined_this_or_super() const {
2255   const Klass* klass = this;
2256   while (klass != nullptr) {
2257     if (InstanceKlass::cast(klass)->has_been_redefined()) {
2258       return true;
2259     }
2260     klass = klass->super();
2261   }
2262   return false;
2263 }
2264 #endif

2637     int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2638 
2639     int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2640                          / itableOffsetEntry::size();
2641 
2642     for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2643       if (ioe->interface_klass() != nullptr) {
2644         it->push(ioe->interface_klass_addr());
2645         itableMethodEntry* ime = ioe->first_method_entry(this);
2646         int n = klassItable::method_count_for_interface(ioe->interface_klass());
2647         for (int index = 0; index < n; index ++) {
2648           it->push(ime[index].method_addr());
2649         }
2650       }
2651     }
2652   }
2653 
2654   it->push(&_nest_host);
2655   it->push(&_nest_members);
2656   it->push(&_permitted_subclasses);

2657   it->push(&_record_components);

2658 }
2659 
2660 #if INCLUDE_CDS
2661 void InstanceKlass::remove_unshareable_info() {
2662 
2663   if (is_linked()) {
2664     assert(can_be_verified_at_dumptime(), "must be");
2665     // Remember this so we can avoid walking the hierarchy at runtime.
2666     set_verified_at_dump_time();
2667   }
2668 
2669   _misc_flags.set_has_init_deps_processed(false);
2670 
2671   Klass::remove_unshareable_info();
2672 
2673   if (SystemDictionaryShared::has_class_failed_verification(this)) {
2674     // Classes are attempted to link during dumping and may fail,
2675     // but these classes are still in the dictionary and class list in CLD.
2676     // If the class has failed verification, there is nothing else to remove.
2677     return;

2685 
2686   { // Otherwise this needs to take out the Compile_lock.
2687     assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2688     init_implementor();
2689   }
2690 
2691   // Call remove_unshareable_info() on other objects that belong to this class, except
2692   // for constants()->remove_unshareable_info(), which is called in a separate pass in
2693   // ArchiveBuilder::make_klasses_shareable(),
2694 
2695   for (int i = 0; i < methods()->length(); i++) {
2696     Method* m = methods()->at(i);
2697     m->remove_unshareable_info();
2698   }
2699 
2700   // do array classes also.
2701   if (array_klasses() != nullptr) {
2702     array_klasses()->remove_unshareable_info();
2703   }
2704 
2705   // These are not allocated from metaspace. They are safe to set to null.
2706   _source_debug_extension = nullptr;
2707   _dep_context = nullptr;
2708   _osr_nmethods_head = nullptr;
2709 #if INCLUDE_JVMTI
2710   _breakpoints = nullptr;
2711   _previous_versions = nullptr;
2712   _cached_class_file = nullptr;
2713   _jvmti_cached_class_field_map = nullptr;
2714 #endif
2715 
2716   _init_thread = nullptr;
2717   _methods_jmethod_ids = nullptr;
2718   _jni_ids = nullptr;
2719   _oop_map_cache = nullptr;
2720   if (CDSConfig::is_dumping_method_handles() && HeapShared::is_lambda_proxy_klass(this)) {
2721     // keep _nest_host
2722   } else {
2723     // clear _nest_host to ensure re-load at runtime
2724     _nest_host = nullptr;
2725   }

2776 void InstanceKlass::compute_has_loops_flag_for_methods() {
2777   Array<Method*>* methods = this->methods();
2778   for (int index = 0; index < methods->length(); ++index) {
2779     Method* m = methods->at(index);
2780     if (!m->is_overpass()) { // work around JDK-8305771
2781       m->compute_has_loops_flag();
2782     }
2783   }
2784 }
2785 
2786 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2787                                              PackageEntry* pkg_entry, TRAPS) {
2788   // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
2789   // before the InstanceKlass is added to the SystemDictionary. Make
2790   // sure the current state is <loaded.
2791   assert(!is_loaded(), "invalid init state");
2792   assert(!shared_loading_failed(), "Must not try to load failed class again");
2793   set_package(loader_data, pkg_entry, CHECK);
2794   Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2795 




2796   Array<Method*>* methods = this->methods();
2797   int num_methods = methods->length();
2798   for (int index = 0; index < num_methods; ++index) {
2799     methods->at(index)->restore_unshareable_info(CHECK);
2800   }
2801 #if INCLUDE_JVMTI
2802   if (JvmtiExport::has_redefined_a_class()) {
2803     // Reinitialize vtable because RedefineClasses may have changed some
2804     // entries in this vtable for super classes so the CDS vtable might
2805     // point to old or obsolete entries.  RedefineClasses doesn't fix up
2806     // vtables in the shared system dictionary, only the main one.
2807     // It also redefines the itable too so fix that too.
2808     // First fix any default methods that point to a super class that may
2809     // have been redefined.
2810     bool trace_name_printed = false;
2811     adjust_default_methods(&trace_name_printed);
2812     if (verified_at_dump_time()) {
2813       // Initialize vtable and itable for classes which can be verified at dump time.
2814       // Unlinked classes such as old classes with major version < 50 cannot be verified
2815       // at dump time.
2816       vtable().initialize_vtable();
2817       itable().initialize_itable();
2818     }
2819   }
2820 #endif // INCLUDE_JVMTI
2821 
2822   // restore constant pool resolved references
2823   constants()->restore_unshareable_info(CHECK);
2824 
2825   if (array_klasses() != nullptr) {
2826     // To get a consistent list of classes we need MultiArray_lock to ensure
2827     // array classes aren't observed while they are being restored.
2828     RecursiveLocker rl(MultiArray_lock, THREAD);
2829     assert(this == array_klasses()->bottom_klass(), "sanity");
2830     // Array classes have null protection domain.
2831     // --> see ArrayKlass::complete_create_array_klass()






2832     array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
2833   }
2834 
2835   // Initialize @ValueBased class annotation if not already set in the archived klass.
2836   if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation() && !is_value_based()) {
2837     set_is_value_based();
2838   }
2839 
2840   DEBUG_ONLY(FieldInfoStream::validate_search_table(_constants, _fieldinfo_stream, _fieldinfo_search_table));
2841 }
2842 
2843 // Check if a class or any of its supertypes has a version older than 50.
2844 // CDS will not perform verification of old classes during dump time because
2845 // without changing the old verifier, the verification constraint cannot be
2846 // retrieved during dump time.
2847 // Verification of archived old classes will be performed during run time.
2848 bool InstanceKlass::can_be_verified_at_dumptime() const {
2849   if (MetaspaceShared::is_in_shared_metaspace(this)) {
2850     // This is a class that was dumped into the base archive, so we know
2851     // it was verified at dump time.

2965     constants()->release_C_heap_structures();
2966   }
2967 }
2968 
2969 // The constant pool is on stack if any of the methods are executing or
2970 // referenced by handles.
2971 bool InstanceKlass::on_stack() const {
2972   return _constants->on_stack();
2973 }
2974 
2975 Symbol* InstanceKlass::source_file_name() const               { return _constants->source_file_name(); }
2976 u2 InstanceKlass::source_file_name_index() const              { return _constants->source_file_name_index(); }
2977 void InstanceKlass::set_source_file_name_index(u2 sourcefile_index) { _constants->set_source_file_name_index(sourcefile_index); }
2978 
2979 // minor and major version numbers of class file
2980 u2 InstanceKlass::minor_version() const                 { return _constants->minor_version(); }
2981 void InstanceKlass::set_minor_version(u2 minor_version) { _constants->set_minor_version(minor_version); }
2982 u2 InstanceKlass::major_version() const                 { return _constants->major_version(); }
2983 void InstanceKlass::set_major_version(u2 major_version) { _constants->set_major_version(major_version); }
2984 




2985 const InstanceKlass* InstanceKlass::get_klass_version(int version) const {
2986   for (const InstanceKlass* ik = this; ik != nullptr; ik = ik->previous_versions()) {
2987     if (ik->constants()->version() == version) {
2988       return ik;
2989     }
2990   }
2991   return nullptr;
2992 }
2993 
2994 void InstanceKlass::set_source_debug_extension(const char* array, int length) {
2995   if (array == nullptr) {
2996     _source_debug_extension = nullptr;
2997   } else {
2998     // Adding one to the attribute length in order to store a null terminator
2999     // character could cause an overflow because the attribute length is
3000     // already coded with an u4 in the classfile, but in practice, it's
3001     // unlikely to happen.
3002     assert((length+1) > length, "Overflow checking");
3003     char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
3004     for (int i = 0; i < length; i++) {
3005       sde[i] = array[i];
3006     }
3007     sde[length] = '\0';
3008     _source_debug_extension = sde;
3009   }
3010 }
3011 
3012 Symbol* InstanceKlass::generic_signature() const                   { return _constants->generic_signature(); }
3013 u2 InstanceKlass::generic_signature_index() const                  { return _constants->generic_signature_index(); }
3014 void InstanceKlass::set_generic_signature_index(u2 sig_index)      { _constants->set_generic_signature_index(sig_index); }
3015 
3016 const char* InstanceKlass::signature_name() const {


3017 

3018   // Get the internal name as a c string
3019   const char* src = (const char*) (name()->as_C_string());
3020   const int src_length = (int)strlen(src);
3021 
3022   char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
3023 
3024   // Add L as type indicator
3025   int dest_index = 0;
3026   dest[dest_index++] = JVM_SIGNATURE_CLASS;
3027 
3028   // Add the actual class name
3029   for (int src_index = 0; src_index < src_length; ) {
3030     dest[dest_index++] = src[src_index++];
3031   }
3032 
3033   if (is_hidden()) { // Replace the last '+' with a '.'.
3034     for (int index = (int)src_length; index > 0; index--) {
3035       if (dest[index] == '+') {
3036         dest[index] = JVM_SIGNATURE_DOT;
3037         break;
3038       }
3039     }
3040   }
3041 
3042   // Add the semicolon and the null
3043   dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
3044   dest[dest_index] = '\0';
3045   return dest;
3046 }

3287 bool InstanceKlass::find_inner_classes_attr(int* ooff, int* noff, TRAPS) const {
3288   constantPoolHandle i_cp(THREAD, constants());
3289   for (InnerClassesIterator iter(this); !iter.done(); iter.next()) {
3290     int ioff = iter.inner_class_info_index();
3291     if (ioff != 0) {
3292       // Check to see if the name matches the class we're looking for
3293       // before attempting to find the class.
3294       if (i_cp->klass_name_at_matches(this, ioff)) {
3295         Klass* inner_klass = i_cp->klass_at(ioff, CHECK_false);
3296         if (this == inner_klass) {
3297           *ooff = iter.outer_class_info_index();
3298           *noff = iter.inner_name_index();
3299           return true;
3300         }
3301       }
3302     }
3303   }
3304   return false;
3305 }
3306 



















3307 InstanceKlass* InstanceKlass::compute_enclosing_class(bool* inner_is_member, TRAPS) const {
3308   InstanceKlass* outer_klass = nullptr;
3309   *inner_is_member = false;
3310   int ooff = 0, noff = 0;
3311   bool has_inner_classes_attr = find_inner_classes_attr(&ooff, &noff, THREAD);
3312   if (has_inner_classes_attr) {
3313     constantPoolHandle i_cp(THREAD, constants());
3314     if (ooff != 0) {
3315       Klass* ok = i_cp->klass_at(ooff, CHECK_NULL);
3316       if (!ok->is_instance_klass()) {
3317         // If the outer class is not an instance klass then it cannot have
3318         // declared any inner classes.
3319         ResourceMark rm(THREAD);
3320         // Names are all known to be < 64k so we know this formatted message is not excessively large.
3321         Exceptions::fthrow(
3322           THREAD_AND_LOCATION,
3323           vmSymbols::java_lang_IncompatibleClassChangeError(),
3324           "%s and %s disagree on InnerClasses attribute",
3325           ok->external_name(),
3326           external_name());

3353 u2 InstanceKlass::compute_modifier_flags() const {
3354   u2 access = access_flags().as_unsigned_short();
3355 
3356   // But check if it happens to be member class.
3357   InnerClassesIterator iter(this);
3358   for (; !iter.done(); iter.next()) {
3359     int ioff = iter.inner_class_info_index();
3360     // Inner class attribute can be zero, skip it.
3361     // Strange but true:  JVM spec. allows null inner class refs.
3362     if (ioff == 0) continue;
3363 
3364     // only look at classes that are already loaded
3365     // since we are looking for the flags for our self.
3366     Symbol* inner_name = constants()->klass_name_at(ioff);
3367     if (name() == inner_name) {
3368       // This is really a member class.
3369       access = iter.inner_access_flags();
3370       break;
3371     }
3372   }
3373   // Remember to strip ACC_SUPER bit
3374   return (access & (~JVM_ACC_SUPER));
3375 }
3376 
3377 jint InstanceKlass::jvmti_class_status() const {
3378   jint result = 0;
3379 
3380   if (is_linked()) {
3381     result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3382   }
3383 
3384   if (is_initialized()) {
3385     assert(is_linked(), "Class status is not consistent");
3386     result |= JVMTI_CLASS_STATUS_INITIALIZED;
3387   }
3388   if (is_in_error_state()) {
3389     result |= JVMTI_CLASS_STATUS_ERROR;
3390   }
3391   return result;
3392 }
3393 
3394 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {

3608     }
3609     osr = osr->osr_link();
3610   }
3611 
3612   assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3613   if (best != nullptr && best->comp_level() >= comp_level) {
3614     return best;
3615   }
3616   return nullptr;
3617 }
3618 
3619 // -----------------------------------------------------------------------------------------------------
3620 // Printing
3621 
3622 #define BULLET  " - "
3623 
3624 static const char* state_names[] = {
3625   "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
3626 };
3627 
3628 static void print_vtable(intptr_t* start, int len, outputStream* st) {



3629   for (int i = 0; i < len; i++) {
3630     intptr_t e = start[i];
3631     st->print("%d : " INTPTR_FORMAT, i, e);





3632     if (MetaspaceObj::is_valid((Metadata*)e)) {
3633       st->print(" ");
3634       ((Metadata*)e)->print_value_on(st);






3635     }
3636     st->cr();
3637   }
3638 }
3639 
3640 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3641   return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);





















3642 }
3643 
3644 const char* InstanceKlass::init_state_name() const {
3645   return state_names[init_state()];
3646 }
3647 
3648 void InstanceKlass::print_on(outputStream* st) const {
3649   assert(is_klass(), "must be klass");
3650   Klass::print_on(st);
3651 
3652   st->print(BULLET"instance size:     %d", size_helper());                        st->cr();
3653   st->print(BULLET"klass size:        %d", size());                               st->cr();
3654   st->print(BULLET"access:            "); access_flags().print_on(st);            st->cr();
3655   st->print(BULLET"flags:             "); _misc_flags.print_on(st);               st->cr();
3656   st->print(BULLET"state:             "); st->print_cr("%s", init_state_name());
3657   st->print(BULLET"name:              "); name()->print_value_on(st);             st->cr();
3658   st->print(BULLET"super:             "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3659   st->print(BULLET"sub:               ");
3660   Klass* sub = subklass();
3661   int n;
3662   for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3663     if (n < MaxSubklassPrintSize) {
3664       sub->print_value_on(st);
3665       st->print("   ");
3666     }
3667   }
3668   if (n >= MaxSubklassPrintSize) st->print("(%zd more klasses...)", n - MaxSubklassPrintSize);
3669   st->cr();
3670 
3671   if (is_interface()) {
3672     st->print_cr(BULLET"nof implementors:  %d", nof_implementors());
3673     if (nof_implementors() == 1) {
3674       st->print_cr(BULLET"implementor:    ");
3675       st->print("   ");
3676       implementor()->print_value_on(st);
3677       st->cr();
3678     }
3679   }
3680 
3681   st->print(BULLET"arrays:            "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3682   st->print(BULLET"methods:           "); methods()->print_value_on(st);               st->cr();
3683   if (Verbose || WizardMode) {
3684     Array<Method*>* method_array = methods();
3685     for (int i = 0; i < method_array->length(); i++) {
3686       st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3687     }
3688   }
3689   st->print(BULLET"method ordering:   "); method_ordering()->print_value_on(st);      st->cr();
3690   if (default_methods() != nullptr) {
3691     st->print(BULLET"default_methods:   "); default_methods()->print_value_on(st);    st->cr();
3692     if (Verbose) {
3693       Array<Method*>* method_array = default_methods();
3694       for (int i = 0; i < method_array->length(); i++) {
3695         st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3696       }
3697     }
3698   }
3699   print_on_maybe_null(st, BULLET"default vtable indices:   ", default_vtable_indices());
3700   st->print(BULLET"local interfaces:  "); local_interfaces()->print_value_on(st);      st->cr();
3701   st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3702 
3703   st->print(BULLET"secondary supers: "); secondary_supers()->print_value_on(st); st->cr();
3704 
3705   st->print(BULLET"hash_slot:         %d", hash_slot()); st->cr();
3706   st->print(BULLET"secondary bitmap: " UINTX_FORMAT_X_0, _secondary_supers_bitmap); st->cr();
3707 
3708   if (secondary_supers() != nullptr) {
3709     if (Verbose) {
3710       bool is_hashed = (_secondary_supers_bitmap != SECONDARY_SUPERS_BITMAP_FULL);
3711       st->print_cr(BULLET"---- secondary supers (%d words):", _secondary_supers->length());
3712       for (int i = 0; i < _secondary_supers->length(); i++) {
3713         ResourceMark rm; // for external_name()
3714         Klass* secondary_super = _secondary_supers->at(i);
3715         st->print(BULLET"%2d:", i);
3716         if (is_hashed) {
3717           int home_slot = compute_home_slot(secondary_super, _secondary_supers_bitmap);

3737   print_on_maybe_null(st, BULLET"field type annotations:  ", fields_type_annotations());
3738   {
3739     bool have_pv = false;
3740     // previous versions are linked together through the InstanceKlass
3741     for (InstanceKlass* pv_node = previous_versions();
3742          pv_node != nullptr;
3743          pv_node = pv_node->previous_versions()) {
3744       if (!have_pv)
3745         st->print(BULLET"previous version:  ");
3746       have_pv = true;
3747       pv_node->constants()->print_value_on(st);
3748     }
3749     if (have_pv) st->cr();
3750   }
3751 
3752   print_on_maybe_null(st, BULLET"generic signature: ", generic_signature());
3753   st->print(BULLET"inner classes:     "); inner_classes()->print_value_on(st);     st->cr();
3754   st->print(BULLET"nest members:     "); nest_members()->print_value_on(st);     st->cr();
3755   print_on_maybe_null(st, BULLET"record components:     ", record_components());
3756   st->print(BULLET"permitted subclasses:     "); permitted_subclasses()->print_value_on(st);     st->cr();

3757   if (java_mirror() != nullptr) {
3758     st->print(BULLET"java mirror:       ");
3759     java_mirror()->print_value_on(st);
3760     st->cr();
3761   } else {
3762     st->print_cr(BULLET"java mirror:       null");
3763   }
3764   st->print(BULLET"vtable length      %d  (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3765   if (vtable_length() > 0 && (Verbose || WizardMode))  print_vtable(start_of_vtable(), vtable_length(), st);
3766   st->print(BULLET"itable length      %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3767   if (itable_length() > 0 && (Verbose || WizardMode))  print_vtable(start_of_itable(), itable_length(), st);
3768   st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3769 
3770   FieldPrinter print_static_field(st);
3771   ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3772   st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3773   FieldPrinter print_nonstatic_field(st);
3774   InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3775   ik->print_nonstatic_fields(&print_nonstatic_field);
3776 
3777   st->print(BULLET"non-static oop maps (%d entries): ", nonstatic_oop_map_count());
3778   OopMapBlock* map     = start_of_nonstatic_oop_maps();
3779   OopMapBlock* end_map = map + nonstatic_oop_map_count();
3780   while (map < end_map) {
3781     st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3782     map++;
3783   }
3784   st->cr();
3785 
3786   if (fieldinfo_search_table() != nullptr) {
3787     st->print_cr(BULLET"---- field info search table:");
3788     FieldInfoStream::print_search_table(st, _constants, _fieldinfo_stream, _fieldinfo_search_table);
3789   }
3790 }
3791 
3792 void InstanceKlass::print_value_on(outputStream* st) const {
3793   assert(is_klass(), "must be klass");
3794   if (Verbose || WizardMode)  access_flags().print_on(st);
3795   name()->print_value_on(st);
3796 }
3797 
3798 void FieldPrinter::do_field(fieldDescriptor* fd) {

3799   _st->print(BULLET);
3800    if (_obj == nullptr) {
3801      fd->print_on(_st);
3802      _st->cr();
3803    } else {
3804      fd->print_on_for(_st, _obj);
3805      _st->cr();
3806    }
3807 }
3808 
3809 
3810 void InstanceKlass::oop_print_on(oop obj, outputStream* st) {
3811   Klass::oop_print_on(obj, st);
3812 
3813   if (this == vmClasses::String_klass()) {
3814     typeArrayOop value  = java_lang_String::value(obj);
3815     juint        length = java_lang_String::length(obj);
3816     if (value != nullptr &&
3817         value->is_typeArray() &&
3818         length <= (juint) value->length()) {
3819       st->print(BULLET"string: ");
3820       java_lang_String::print(obj, st);
3821       st->cr();
3822     }
3823   }
3824 
3825   st->print_cr(BULLET"---- fields (total size %zu words):", oop_size(obj));
3826   FieldPrinter print_field(st, obj);
3827   print_nonstatic_fields(&print_field);
3828 
3829   if (this == vmClasses::Class_klass()) {
3830     st->print(BULLET"signature: ");
3831     java_lang_Class::print_signature(obj, st);
3832     st->cr();
3833     Klass* real_klass = java_lang_Class::as_Klass(obj);
3834     if (real_klass != nullptr && real_klass->is_instance_klass()) {
3835       st->print_cr(BULLET"---- static fields (%d):", java_lang_Class::static_oop_field_count(obj));
3836       InstanceKlass::cast(real_klass)->do_local_static_fields(&print_field);
3837     }
3838   } else if (this == vmClasses::MethodType_klass()) {
3839     st->print(BULLET"signature: ");
3840     java_lang_invoke_MethodType::print_signature(obj, st);
3841     st->cr();
3842   }
3843 }
3844 
3845 #ifndef PRODUCT
3846 

  46 #include "compiler/compileBroker.hpp"
  47 #include "gc/shared/collectedHeap.inline.hpp"
  48 #include "interpreter/bytecodeStream.hpp"
  49 #include "interpreter/oopMapCache.hpp"
  50 #include "interpreter/rewriter.hpp"
  51 #include "jvm.h"
  52 #include "jvmtifiles/jvmti.h"
  53 #include "klass.inline.hpp"
  54 #include "logging/log.hpp"
  55 #include "logging/logMessage.hpp"
  56 #include "logging/logStream.hpp"
  57 #include "memory/allocation.inline.hpp"
  58 #include "memory/iterator.inline.hpp"
  59 #include "memory/metadataFactory.hpp"
  60 #include "memory/metaspaceClosure.hpp"
  61 #include "memory/oopFactory.hpp"
  62 #include "memory/resourceArea.hpp"
  63 #include "memory/universe.hpp"
  64 #include "oops/constantPool.hpp"
  65 #include "oops/fieldStreams.inline.hpp"
  66 #include "oops/inlineKlass.hpp"
  67 #include "oops/instanceClassLoaderKlass.hpp"
  68 #include "oops/instanceKlass.inline.hpp"
  69 #include "oops/instanceMirrorKlass.hpp"
  70 #include "oops/instanceOop.hpp"
  71 #include "oops/instanceStackChunkKlass.hpp"
  72 #include "oops/klass.inline.hpp"
  73 #include "oops/markWord.hpp"
  74 #include "oops/method.hpp"
  75 #include "oops/oop.inline.hpp"
  76 #include "oops/recordComponent.hpp"
  77 #include "oops/refArrayKlass.hpp"
  78 #include "oops/symbol.hpp"
  79 #include "prims/jvmtiExport.hpp"
  80 #include "prims/jvmtiRedefineClasses.hpp"
  81 #include "prims/jvmtiThreadState.hpp"
  82 #include "prims/methodComparator.hpp"
  83 #include "runtime/arguments.hpp"
  84 #include "runtime/atomic.hpp"
  85 #include "runtime/deoptimization.hpp"
  86 #include "runtime/fieldDescriptor.inline.hpp"
  87 #include "runtime/handles.inline.hpp"
  88 #include "runtime/javaCalls.hpp"
  89 #include "runtime/javaThread.inline.hpp"
  90 #include "runtime/mutexLocker.hpp"
  91 #include "runtime/orderAccess.hpp"
  92 #include "runtime/os.inline.hpp"
  93 #include "runtime/reflection.hpp"
  94 #include "runtime/synchronizer.hpp"
  95 #include "runtime/threads.hpp"
  96 #include "services/classLoadingService.hpp"
  97 #include "services/finalizerService.hpp"

 135 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait)     \
 136   {                                                              \
 137     char* data = nullptr;                                        \
 138     int len = 0;                                                 \
 139     Symbol* clss_name = name();                                  \
 140     if (clss_name != nullptr) {                                  \
 141       data = (char*)clss_name->bytes();                          \
 142       len = clss_name->utf8_length();                            \
 143     }                                                            \
 144     HOTSPOT_CLASS_INITIALIZATION_##type(                         \
 145       data, len, (void*)class_loader(), thread_type, wait);      \
 146   }
 147 
 148 #else //  ndef DTRACE_ENABLED
 149 
 150 #define DTRACE_CLASSINIT_PROBE(type, thread_type)
 151 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait)
 152 
 153 #endif //  ndef DTRACE_ENABLED
 154 
 155 void InlineLayoutInfo::metaspace_pointers_do(MetaspaceClosure* it) {
 156   log_trace(cds)("Iter(InlineFieldInfo): %p", this);
 157   it->push(&_klass);
 158 }
 159 
 160 bool InstanceKlass::_finalization_enabled = true;
 161 
 162 static inline bool is_class_loader(const Symbol* class_name,
 163                                    const ClassFileParser& parser) {
 164   assert(class_name != nullptr, "invariant");
 165 
 166   if (class_name == vmSymbols::java_lang_ClassLoader()) {
 167     return true;
 168   }
 169 
 170   if (vmClasses::ClassLoader_klass_loaded()) {
 171     const Klass* const super_klass = parser.super_klass();
 172     if (super_klass != nullptr) {
 173       if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
 174         return true;
 175       }
 176     }
 177   }
 178   return false;
 179 }
 180 
 181 bool InstanceKlass::field_is_null_free_inline_type(int index) const {
 182   return field(index).field_flags().is_null_free_inline_type();
 183 }
 184 
 185 bool InstanceKlass::is_class_in_loadable_descriptors_attribute(Symbol* name) const {
 186   if (_loadable_descriptors == nullptr) return false;
 187   for (int i = 0; i < _loadable_descriptors->length(); i++) {
 188         Symbol* class_name = _constants->symbol_at(_loadable_descriptors->at(i));
 189         if (class_name == name) return true;
 190   }
 191   return false;
 192 }
 193 
 194 static inline bool is_stack_chunk_class(const Symbol* class_name,
 195                                         const ClassLoaderData* loader_data) {
 196   return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
 197           loader_data->is_the_null_class_loader_data());
 198 }
 199 
 200 // private: called to verify that k is a static member of this nest.
 201 // We know that k is an instance class in the same package and hence the
 202 // same classloader.
 203 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
 204   assert(!is_hidden(), "unexpected hidden class");
 205   if (_nest_members == nullptr || _nest_members == Universe::the_empty_short_array()) {
 206     if (log_is_enabled(Trace, class, nestmates)) {
 207       ResourceMark rm(current);
 208       log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
 209                                   k->external_name(), this->external_name());
 210     }
 211     return false;
 212   }
 213 

 468 }
 469 
 470 const char* InstanceKlass::nest_host_error() {
 471   if (_nest_host_index == 0) {
 472     return nullptr;
 473   } else {
 474     constantPoolHandle cph(Thread::current(), constants());
 475     return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
 476   }
 477 }
 478 
 479 void* InstanceKlass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size,
 480                                   bool use_class_space, TRAPS) throw() {
 481   return Metaspace::allocate(loader_data, word_size, ClassType, use_class_space, THREAD);
 482 }
 483 
 484 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
 485   const int size = InstanceKlass::size(parser.vtable_size(),
 486                                        parser.itable_size(),
 487                                        nonstatic_oop_map_size(parser.total_oop_map_count()),
 488                                        parser.is_interface(),
 489                                        parser.is_inline_type());
 490 
 491   const Symbol* const class_name = parser.class_name();
 492   assert(class_name != nullptr, "invariant");
 493   ClassLoaderData* loader_data = parser.loader_data();
 494   assert(loader_data != nullptr, "invariant");
 495 
 496   InstanceKlass* ik;
 497   const bool use_class_space = UseClassMetaspaceForAllClasses || parser.klass_needs_narrow_id();
 498 
 499   // Allocation
 500   if (parser.is_instance_ref_klass()) {
 501     // java.lang.ref.Reference
 502     ik = new (loader_data, size, use_class_space, THREAD) InstanceRefKlass(parser);
 503   } else if (class_name == vmSymbols::java_lang_Class()) {
 504     // mirror - java.lang.Class
 505     ik = new (loader_data, size, use_class_space, THREAD) InstanceMirrorKlass(parser);
 506   } else if (is_stack_chunk_class(class_name, loader_data)) {
 507     // stack chunk
 508     ik = new (loader_data, size, use_class_space, THREAD) InstanceStackChunkKlass(parser);
 509   } else if (is_class_loader(class_name, parser)) {
 510     // class loader - java.lang.ClassLoader
 511     ik = new (loader_data, size, use_class_space, THREAD) InstanceClassLoaderKlass(parser);
 512   } else if (parser.is_inline_type()) {
 513     // inline type
 514     ik = new (loader_data, size, use_class_space, THREAD) InlineKlass(parser);
 515   } else {
 516     // normal
 517     ik = new (loader_data, size, use_class_space, THREAD) InstanceKlass(parser);
 518   }
 519 
 520   if (ik != nullptr && UseCompressedClassPointers && use_class_space) {
 521     assert(CompressedKlassPointers::is_encodable(ik),
 522            "Klass " PTR_FORMAT "needs a narrow Klass ID, but is not encodable", p2i(ik));
 523   }
 524 
 525   // Check for pending exception before adding to the loader data and incrementing
 526   // class count.  Can get OOM here.
 527   if (HAS_PENDING_EXCEPTION) {
 528     return nullptr;
 529   }
 530 
 531 #ifdef ASSERT
 532   ik->bounds_check((address) ik->start_of_vtable(), false, size);
 533   ik->bounds_check((address) ik->start_of_itable(), false, size);
 534   ik->bounds_check((address) ik->end_of_itable(), true, size);
 535   ik->bounds_check((address) ik->end_of_nonstatic_oop_maps(), true, size);
 536 #endif //ASSERT
 537   return ik;
 538 }
 539 
 540 #ifndef PRODUCT
 541 bool InstanceKlass::bounds_check(address addr, bool edge_ok, intptr_t size_in_bytes) const {
 542   const char* bad = nullptr;
 543   address end = nullptr;
 544   if (addr < (address)this) {
 545     bad = "before";
 546   } else if (addr == (address)this) {
 547     if (edge_ok)  return true;
 548     bad = "just before";
 549   } else if (addr == (end = (address)this + sizeof(intptr_t) * (size_in_bytes < 0 ? size() : size_in_bytes))) {
 550     if (edge_ok)  return true;
 551     bad = "just after";
 552   } else if (addr > end) {
 553     bad = "after";
 554   } else {
 555     return true;
 556   }
 557   tty->print_cr("%s object bounds: " INTPTR_FORMAT " [" INTPTR_FORMAT ".." INTPTR_FORMAT "]",
 558       bad, (intptr_t)addr, (intptr_t)this, (intptr_t)end);
 559   Verbose = WizardMode = true; this->print(); //@@
 560   return false;
 561 }
 562 #endif //PRODUCT
 563 
 564 // copy method ordering from resource area to Metaspace
 565 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
 566   if (m != nullptr) {
 567     // allocate a new array and copy contents (memcpy?)
 568     _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
 569     for (int i = 0; i < m->length(); i++) {
 570       _method_ordering->at_put(i, m->at(i));
 571     }
 572   } else {
 573     _method_ordering = Universe::the_empty_int_array();
 574   }
 575 }
 576 
 577 // create a new array of vtable_indices for default methods
 578 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
 579   Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
 580   assert(default_vtable_indices() == nullptr, "only create once");
 581   set_default_vtable_indices(vtable_indices);
 582   return vtable_indices;
 583 }
 584 
 585 
 586 InstanceKlass::InstanceKlass() {
 587   assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
 588 }
 589 
 590 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, markWord prototype_header, ReferenceType reference_type) :
 591   Klass(kind, prototype_header),
 592   _nest_members(nullptr),
 593   _nest_host(nullptr),
 594   _permitted_subclasses(nullptr),
 595   _record_components(nullptr),
 596   _static_field_size(parser.static_field_size()),
 597   _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
 598   _itable_len(parser.itable_size()),
 599   _nest_host_index(0),
 600   _init_state(allocated),
 601   _reference_type(reference_type),
 602   _init_thread(nullptr),
 603   _inline_layout_info_array(nullptr),
 604   _loadable_descriptors(nullptr),
 605   _adr_inlineklass_fixed_block(nullptr)
 606 {
 607   set_vtable_length(parser.vtable_size());
 608   set_access_flags(parser.access_flags());
 609   if (parser.is_hidden()) set_is_hidden();
 610   set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
 611                                                     false));
 612   if (parser.has_inline_fields()) {
 613     set_has_inline_type_fields();
 614   }
 615 
 616   assert(nullptr == _methods, "underlying memory not zeroed?");
 617   assert(is_instance_klass(), "is layout incorrect?");
 618   assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
 619 }
 620 
 621 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
 622                                        Array<Method*>* methods) {
 623   if (methods != nullptr && methods != Universe::the_empty_method_array() &&
 624       !methods->is_shared()) {
 625     for (int i = 0; i < methods->length(); i++) {
 626       Method* method = methods->at(i);
 627       if (method == nullptr) continue;  // maybe null if error processing
 628       // Only want to delete methods that are not executing for RedefineClasses.
 629       // The previous version will point to them so they're not totally dangling
 630       assert (!method->on_stack(), "shouldn't be called with methods on stack");
 631       MetadataFactory::free_metadata(loader_data, method);
 632     }
 633     MetadataFactory::free_array<Method*>(loader_data, methods);
 634   }

 739 
 740   deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
 741   set_transitive_interfaces(nullptr);
 742   set_local_interfaces(nullptr);
 743 
 744   if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
 745     MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
 746   }
 747   set_fieldinfo_stream(nullptr);
 748 
 749   if (fieldinfo_search_table() != nullptr && !fieldinfo_search_table()->is_shared()) {
 750     MetadataFactory::free_array<u1>(loader_data, fieldinfo_search_table());
 751   }
 752   set_fieldinfo_search_table(nullptr);
 753 
 754   if (fields_status() != nullptr && !fields_status()->is_shared()) {
 755     MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
 756   }
 757   set_fields_status(nullptr);
 758 
 759   if (inline_layout_info_array() != nullptr) {
 760     MetadataFactory::free_array<InlineLayoutInfo>(loader_data, inline_layout_info_array());
 761   }
 762   set_inline_layout_info_array(nullptr);
 763 
 764   // If a method from a redefined class is using this constant pool, don't
 765   // delete it, yet.  The new class's previous version will point to this.
 766   if (constants() != nullptr) {
 767     assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
 768     if (!constants()->is_shared()) {
 769       MetadataFactory::free_metadata(loader_data, constants());
 770     }
 771     // Delete any cached resolution errors for the constant pool
 772     SystemDictionary::delete_resolution_error(constants());
 773 
 774     set_constants(nullptr);
 775   }
 776 
 777   if (inner_classes() != nullptr &&
 778       inner_classes() != Universe::the_empty_short_array() &&
 779       !inner_classes()->is_shared()) {
 780     MetadataFactory::free_array<jushort>(loader_data, inner_classes());
 781   }
 782   set_inner_classes(nullptr);
 783 
 784   if (nest_members() != nullptr &&
 785       nest_members() != Universe::the_empty_short_array() &&
 786       !nest_members()->is_shared()) {
 787     MetadataFactory::free_array<jushort>(loader_data, nest_members());
 788   }
 789   set_nest_members(nullptr);
 790 
 791   if (permitted_subclasses() != nullptr &&
 792       permitted_subclasses() != Universe::the_empty_short_array() &&
 793       !permitted_subclasses()->is_shared()) {
 794     MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
 795   }
 796   set_permitted_subclasses(nullptr);
 797 
 798   if (loadable_descriptors() != nullptr &&
 799       loadable_descriptors() != Universe::the_empty_short_array() &&
 800       !loadable_descriptors()->is_shared()) {
 801     MetadataFactory::free_array<jushort>(loader_data, loadable_descriptors());
 802   }
 803   set_loadable_descriptors(nullptr);
 804 
 805   // We should deallocate the Annotations instance if it's not in shared spaces.
 806   if (annotations() != nullptr && !annotations()->is_shared()) {
 807     MetadataFactory::free_metadata(loader_data, annotations());
 808   }
 809   set_annotations(nullptr);
 810 
 811   SystemDictionaryShared::handle_class_unloading(this);
 812 
 813 #if INCLUDE_CDS_JAVA_HEAP
 814   if (CDSConfig::is_dumping_heap()) {
 815     HeapShared::remove_scratch_objects(this);
 816   }
 817 #endif
 818 }
 819 
 820 bool InstanceKlass::is_record() const {
 821   return _record_components != nullptr &&
 822          is_final() &&
 823          java_super() == vmClasses::Record_klass();
 824 }

 953 #ifdef ASSERT
 954   {
 955     Handle h_init_lock(THREAD, init_lock());
 956     ObjectLocker ol(h_init_lock, THREAD);
 957     assert(!is_initialized(), "sanity");
 958     assert(!is_being_initialized(), "sanity");
 959     assert(!is_in_error_state(), "sanity");
 960   }
 961 #endif
 962 
 963   set_init_thread(THREAD);
 964   set_initialization_state_and_notify(fully_initialized, CHECK);
 965 }
 966 #endif
 967 
 968 bool InstanceKlass::verify_code(TRAPS) {
 969   // 1) Verify the bytecodes
 970   return Verifier::verify(this, should_verify_class(), THREAD);
 971 }
 972 
 973 static void load_classes_from_loadable_descriptors_attribute(InstanceKlass *ik, TRAPS) {
 974   ResourceMark rm(THREAD);
 975   if (ik->loadable_descriptors() != nullptr && PreloadClasses) {
 976     HandleMark hm(THREAD);
 977     for (int i = 0; i < ik->loadable_descriptors()->length(); i++) {
 978       Symbol* sig = ik->constants()->symbol_at(ik->loadable_descriptors()->at(i));
 979       if (!Signature::has_envelope(sig)) continue;
 980       TempNewSymbol class_name = Signature::strip_envelope(sig);
 981       if (class_name == ik->name()) continue;
 982       log_info(class, preload)("Preloading of class %s during linking of class %s "
 983                                "because of the class is listed in the LoadableDescriptors attribute",
 984                                sig->as_C_string(), ik->name()->as_C_string());
 985       oop loader = ik->class_loader();
 986       Klass* klass = SystemDictionary::resolve_or_null(class_name,
 987                                                         Handle(THREAD, loader), THREAD);
 988       if (HAS_PENDING_EXCEPTION) {
 989         CLEAR_PENDING_EXCEPTION;
 990       }
 991       if (klass != nullptr) {
 992         log_info(class, preload)("Preloading of class %s during linking of class %s "
 993                                  "(cause: LoadableDescriptors attribute) succeeded",
 994                                  class_name->as_C_string(), ik->name()->as_C_string());
 995         if (!klass->is_inline_klass()) {
 996           // Non value class are allowed by the current spec, but it could be an indication
 997           // of an issue so let's log a warning
 998           log_warning(class, preload)("Preloading of class %s during linking of class %s "
 999                                       "(cause: LoadableDescriptors attribute) but loaded class is not a value class",
1000                                       class_name->as_C_string(), ik->name()->as_C_string());
1001         }
1002       } else {
1003         log_warning(class, preload)("Preloading of class %s during linking of class %s "
1004                                     "(cause: LoadableDescriptors attribute) failed",
1005                                     class_name->as_C_string(), ik->name()->as_C_string());
1006       }
1007     }
1008   }
1009 }
1010 
1011 void InstanceKlass::link_class(TRAPS) {
1012   assert(is_loaded(), "must be loaded");
1013   if (!is_linked()) {
1014     link_class_impl(CHECK);
1015   }
1016 }
1017 
1018 // Called to verify that a class can link during initialization, without
1019 // throwing a VerifyError.
1020 bool InstanceKlass::link_class_or_fail(TRAPS) {
1021   assert(is_loaded(), "must be loaded");
1022   if (!is_linked()) {
1023     link_class_impl(CHECK_false);
1024   }
1025   return is_linked();
1026 }
1027 
1028 bool InstanceKlass::link_class_impl(TRAPS) {
1029   if (CDSConfig::is_dumping_static_archive() && SystemDictionaryShared::has_class_failed_verification(this)) {
1030     // This is for CDS static dump only -- we use the in_error_state to indicate that

1062         vmSymbols::java_lang_IncompatibleClassChangeError(),
1063         "class %s has interface %s as super class",
1064         external_name(),
1065         super_klass->external_name()
1066       );
1067       return false;
1068     }
1069 
1070     InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
1071     ik_super->link_class_impl(CHECK_false);
1072   }
1073 
1074   // link all interfaces implemented by this class before linking this class
1075   Array<InstanceKlass*>* interfaces = local_interfaces();
1076   int num_interfaces = interfaces->length();
1077   for (int index = 0; index < num_interfaces; index++) {
1078     InstanceKlass* interk = interfaces->at(index);
1079     interk->link_class_impl(CHECK_false);
1080   }
1081 
1082   if (EnableValhalla) {
1083     // Aggressively preloading all classes from the LoadableDescriptors attribute
1084     // so inline classes can be scalarized in the calling conventions computed below
1085     load_classes_from_loadable_descriptors_attribute(this, THREAD);
1086     assert(!HAS_PENDING_EXCEPTION, "Shouldn't have pending exceptions from call above");
1087   }
1088 
1089   // in case the class is linked in the process of linking its superclasses
1090   if (is_linked()) {
1091     return true;
1092   }
1093 
1094   // trace only the link time for this klass that includes
1095   // the verification time
1096   PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
1097                              ClassLoader::perf_class_link_selftime(),
1098                              ClassLoader::perf_classes_linked(),
1099                              jt->get_thread_stat()->perf_recursion_counts_addr(),
1100                              jt->get_thread_stat()->perf_timers_addr(),
1101                              PerfClassTraceTime::CLASS_LINK);
1102 
1103   // verification & rewriting
1104   {
1105     HandleMark hm(THREAD);
1106     Handle h_init_lock(THREAD, init_lock());
1107     ObjectLocker ol(h_init_lock, jt);
1108     // rewritten will have been set if loader constraint error found

1373       ss.print("Could not initialize class %s", external_name());
1374       if (cause.is_null()) {
1375         THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1376       } else {
1377         THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1378                         ss.as_string(), cause);
1379       }
1380     } else {
1381 
1382       // Step 6
1383       set_init_state(being_initialized);
1384       set_init_thread(jt);
1385       if (debug_logging_enabled) {
1386         ResourceMark rm(jt);
1387         log_debug(class, init)("Thread \"%s\" is initializing %s",
1388                                jt->name(), external_name());
1389       }
1390     }
1391   }
1392 
1393   // Pre-allocating an all-zero value to be used to reset nullable flat storages
1394   if (is_inline_klass()) {
1395       InlineKlass* vk = InlineKlass::cast(this);
1396       if (vk->has_nullable_atomic_layout()) {
1397         oop val = vk->allocate_instance(THREAD);
1398         if (HAS_PENDING_EXCEPTION) {
1399             Handle e(THREAD, PENDING_EXCEPTION);
1400             CLEAR_PENDING_EXCEPTION;
1401             {
1402                 EXCEPTION_MARK;
1403                 add_initialization_error(THREAD, e);
1404                 // Locks object, set state, and notify all waiting threads
1405                 set_initialization_state_and_notify(initialization_error, THREAD);
1406                 CLEAR_PENDING_EXCEPTION;
1407             }
1408             THROW_OOP(e());
1409         }
1410         vk->set_null_reset_value(val);
1411       }
1412   }
1413 
1414   // Step 7
1415   // Next, if C is a class rather than an interface, initialize it's super class and super
1416   // interfaces.
1417   if (!is_interface()) {
1418     Klass* super_klass = super();
1419     if (super_klass != nullptr && super_klass->should_be_initialized()) {
1420       super_klass->initialize(THREAD);
1421     }
1422     // If C implements any interface that declares a non-static, concrete method,
1423     // the initialization of C triggers initialization of its super interfaces.
1424     // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1425     // having a superinterface that declares, non-static, concrete methods
1426     if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1427       initialize_super_interfaces(THREAD);
1428     }
1429 
1430     // If any exceptions, complete abruptly, throwing the same exception as above.
1431     if (HAS_PENDING_EXCEPTION) {
1432       Handle e(THREAD, PENDING_EXCEPTION);
1433       CLEAR_PENDING_EXCEPTION;
1434       {
1435         EXCEPTION_MARK;
1436         add_initialization_error(THREAD, e);
1437         // Locks object, set state, and notify all waiting threads
1438         set_initialization_state_and_notify(initialization_error, THREAD);
1439         CLEAR_PENDING_EXCEPTION;
1440       }
1441       DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1442       THROW_OOP(e());
1443     }
1444   }
1445 

1446   // Step 8
1447   {
1448     DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1449     if (class_initializer() != nullptr) {
1450       // Timer includes any side effects of class initialization (resolution,
1451       // etc), but not recursive entry into call_class_initializer().
1452       PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1453                                ClassLoader::perf_class_init_selftime(),
1454                                ClassLoader::perf_classes_inited(),
1455                                jt->get_thread_stat()->perf_recursion_counts_addr(),
1456                                jt->get_thread_stat()->perf_timers_addr(),
1457                                PerfClassTraceTime::CLASS_CLINIT);
1458       call_class_initializer(THREAD);
1459     } else {
1460       // The elapsed time is so small it's not worth counting.
1461       if (UsePerfData) {
1462         ClassLoader::perf_classes_inited()->inc();
1463       }
1464       call_class_initializer(THREAD);
1465     }
1466 
1467     if (has_strict_static_fields() && !HAS_PENDING_EXCEPTION) {
1468       // Step 9 also verifies that strict static fields have been initialized.
1469       // Status bits were set in ClassFileParser::post_process_parsed_stream.
1470       // After <clinit>, bits must all be clear, or else we must throw an error.
1471       // This is an extremely fast check, so we won't bother with a timer.
1472       assert(fields_status() != nullptr, "");
1473       Symbol* bad_strict_static = nullptr;
1474       for (int index = 0; index < fields_status()->length(); index++) {
1475         // Very fast loop over single byte array looking for a set bit.
1476         if (fields_status()->adr_at(index)->is_strict_static_unset()) {
1477           // This strict static field has not been set by the class initializer.
1478           // Note that in the common no-error case, we read no field metadata.
1479           // We only unpack it when we need to report an error.
1480           FieldInfo fi = field(index);
1481           bad_strict_static = fi.name(constants());
1482           if (debug_logging_enabled) {
1483             ResourceMark rm(jt);
1484             const char* msg = format_strict_static_message(bad_strict_static);
1485             log_debug(class, init)("%s", msg);
1486           } else {
1487             // If we are not logging, do not bother to look for a second offense.
1488             break;
1489           }
1490         }
1491       }
1492       if (bad_strict_static != nullptr) {
1493         throw_strict_static_exception(bad_strict_static, "is unset after initialization of", THREAD);
1494       }
1495     }
1496   }
1497 
1498   // Step 9
1499   if (!HAS_PENDING_EXCEPTION) {
1500     set_initialization_state_and_notify(fully_initialized, CHECK);
1501     DEBUG_ONLY(vtable().verify(tty, true);)
1502     CompilationPolicy::replay_training_at_init(this, THREAD);
1503   }
1504   else {
1505     // Step 10 and 11
1506     Handle e(THREAD, PENDING_EXCEPTION);
1507     CLEAR_PENDING_EXCEPTION;
1508     // JVMTI has already reported the pending exception
1509     // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1510     JvmtiExport::clear_detected_exception(jt);
1511     {
1512       EXCEPTION_MARK;
1513       add_initialization_error(THREAD, e);
1514       set_initialization_state_and_notify(initialization_error, THREAD);
1515       CLEAR_PENDING_EXCEPTION;   // ignore any exception thrown, class initialization error is thrown below

1529   }
1530   DTRACE_CLASSINIT_PROBE_WAIT(end, -1, wait);
1531 }
1532 
1533 
1534 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) {
1535   Handle h_init_lock(THREAD, init_lock());
1536   if (h_init_lock() != nullptr) {
1537     ObjectLocker ol(h_init_lock, THREAD);
1538     set_init_thread(nullptr); // reset _init_thread before changing _init_state
1539     set_init_state(state);
1540     fence_and_clear_init_lock();
1541     ol.notify_all(CHECK);
1542   } else {
1543     assert(h_init_lock() != nullptr, "The initialization state should never be set twice");
1544     set_init_thread(nullptr); // reset _init_thread before changing _init_state
1545     set_init_state(state);
1546   }
1547 }
1548 
1549 void InstanceKlass::notify_strict_static_access(int field_index, bool is_writing, TRAPS) {
1550   guarantee(field_index >= 0 && field_index < fields_status()->length(), "valid field index");
1551   DEBUG_ONLY(FieldInfo debugfi = field(field_index));
1552   assert(debugfi.access_flags().is_strict(), "");
1553   assert(debugfi.access_flags().is_static(), "");
1554   FieldStatus& fs = *fields_status()->adr_at(field_index);
1555   LogTarget(Trace, class, init) lt;
1556   if (lt.is_enabled()) {
1557     ResourceMark rm(THREAD);
1558     LogStream ls(lt);
1559     FieldInfo fi = field(field_index);
1560     ls.print("notify %s %s %s%s ",
1561              external_name(), is_writing? "Write" : "Read",
1562              fs.is_strict_static_unset() ? "Unset" : "(set)",
1563              fs.is_strict_static_unread() ? "+Unread" : "");
1564     fi.print(&ls, constants());
1565   }
1566   if (fs.is_strict_static_unset()) {
1567     assert(fs.is_strict_static_unread(), "ClassFileParser resp.");
1568     // If it is not set, there are only two reasonable things we can do here:
1569     // - mark it set if this is putstatic
1570     // - throw an error (Read-Before-Write) if this is getstatic
1571 
1572     // The unset state is (or should be) transient, and observable only in one
1573     // thread during the execution of <clinit>.  Something is wrong here as this
1574     // should not be possible
1575     guarantee(is_reentrant_initialization(THREAD), "unscoped access to strict static");
1576     if (is_writing) {
1577       // clear the "unset" bit, since the field is actually going to be written
1578       fs.update_strict_static_unset(false);
1579     } else {
1580       // throw an IllegalStateException, since we are reading before writing
1581       // see also InstanceKlass::initialize_impl, Step 8 (at end)
1582       Symbol* bad_strict_static = field(field_index).name(constants());
1583       throw_strict_static_exception(bad_strict_static, "is unset before first read in", CHECK);
1584     }
1585   } else {
1586     // Ensure no write after read for final strict statics
1587     FieldInfo fi = field(field_index);
1588     bool is_final = fi.access_flags().is_final();
1589     if (is_final) {
1590       // no final write after read, so observing a constant freezes it, as if <clinit> ended early
1591       // (maybe we could trust the constant a little earlier, before <clinit> ends)
1592       if (is_writing && !fs.is_strict_static_unread()) {
1593         Symbol* bad_strict_static = fi.name(constants());
1594         throw_strict_static_exception(bad_strict_static, "is set after read (as final) in", CHECK);
1595       } else if (!is_writing && fs.is_strict_static_unread()) {
1596         fs.update_strict_static_unread(false);
1597       }
1598     }
1599   }
1600 }
1601 
1602 void InstanceKlass::throw_strict_static_exception(Symbol* field_name, const char* when, TRAPS) {
1603   ResourceMark rm(THREAD);
1604   const char* msg = format_strict_static_message(field_name, when);
1605   THROW_MSG(vmSymbols::java_lang_IllegalStateException(), msg);
1606 }
1607 
1608 const char* InstanceKlass::format_strict_static_message(Symbol* field_name, const char* when) {
1609   stringStream ss;
1610   ss.print("Strict static \"%s\" %s %s",
1611            field_name->as_C_string(),
1612            when == nullptr ? "is unset in" : when,
1613            external_name());
1614   return ss.as_string();
1615 }
1616 
1617 // Update hierarchy. This is done before the new klass has been added to the SystemDictionary. The Compile_lock
1618 // is grabbed, to ensure that the compiler is not using the class hierarchy.
1619 void InstanceKlass::add_to_hierarchy(JavaThread* current) {
1620   assert(!SafepointSynchronize::is_at_safepoint(), "must NOT be at safepoint");
1621 
1622   DeoptimizationScope deopt_scope;
1623   {
1624     MutexLocker ml(current, Compile_lock);
1625 
1626     set_init_state(InstanceKlass::loaded);
1627     // make sure init_state store is already done.
1628     // The compiler reads the hierarchy outside of the Compile_lock.
1629     // Access ordering is used to add to hierarchy.
1630 
1631     // Link into hierarchy.
1632     append_to_sibling_list();                    // add to superklass/sibling list
1633     process_interfaces();                        // handle all "implements" declarations
1634 
1635     // Now mark all code that depended on old class hierarchy.
1636     // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)

1780   for (int i = 0; i < transitive_interfaces()->length(); i++) {
1781     if (transitive_interfaces()->at(i) == k) {
1782       return true;
1783     }
1784   }
1785   return false;
1786 }
1787 
1788 bool InstanceKlass::is_same_or_direct_interface(Klass *k) const {
1789   // Verify direct super interface
1790   if (this == k) return true;
1791   assert(k->is_interface(), "should be an interface class");
1792   for (int i = 0; i < local_interfaces()->length(); i++) {
1793     if (local_interfaces()->at(i) == k) {
1794       return true;
1795     }
1796   }
1797   return false;
1798 }
1799 









1800 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) {
1801   if (TraceFinalizerRegistration) {
1802     tty->print("Registered ");
1803     i->print_value_on(tty);
1804     tty->print_cr(" (" PTR_FORMAT ") as finalizable", p2i(i));
1805   }
1806   instanceHandle h_i(THREAD, i);
1807   // Pass the handle as argument, JavaCalls::call expects oop as jobjects
1808   JavaValue result(T_VOID);
1809   JavaCallArguments args(h_i);
1810   methodHandle mh(THREAD, Universe::finalizer_register_method());
1811   JavaCalls::call(&result, mh, &args, CHECK_NULL);
1812   MANAGEMENT_ONLY(FinalizerService::on_register(h_i(), THREAD);)
1813   return h_i();
1814 }
1815 
1816 instanceOop InstanceKlass::allocate_instance(TRAPS) {
1817   assert(!is_abstract() && !is_interface(), "Should not create this object");
1818   size_t size = size_helper();  // Query before forming handle.
1819   return (instanceOop)Universe::heap()->obj_allocate(this, size, CHECK_NULL);

1847               : vmSymbols::java_lang_IllegalAccessException(), external_name());
1848   }
1849 }
1850 
1851 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1852   // Need load-acquire for lock-free read
1853   if (array_klasses_acquire() == nullptr) {
1854 
1855     // Recursively lock array allocation
1856     RecursiveLocker rl(MultiArray_lock, THREAD);
1857 
1858     // Check if another thread created the array klass while we were waiting for the lock.
1859     if (array_klasses() == nullptr) {
1860       ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, CHECK_NULL);
1861       // use 'release' to pair with lock-free load
1862       release_set_array_klasses(k);
1863     }
1864   }
1865 
1866   // array_klasses() will always be set at this point
1867   ArrayKlass* ak = array_klasses();
1868   assert(ak != nullptr, "should be set");
1869   return ak->array_klass(n, THREAD);
1870 }
1871 
1872 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1873   // Need load-acquire for lock-free read
1874   ArrayKlass* ak = array_klasses_acquire();
1875   if (ak == nullptr) {
1876     return nullptr;
1877   } else {
1878     return ak->array_klass_or_null(n);
1879   }
1880 }
1881 
1882 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1883   return array_klass(1, THREAD);
1884 }
1885 
1886 ArrayKlass* InstanceKlass::array_klass_or_null() {
1887   return array_klass_or_null(1);
1888 }
1889 
1890 static int call_class_initializer_counter = 0;   // for debugging
1891 
1892 Method* InstanceKlass::class_initializer() const {
1893   Method* clinit = find_method(
1894       vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1895   if (clinit != nullptr && clinit->is_class_initializer()) {
1896     return clinit;
1897   }
1898   return nullptr;
1899 }
1900 
1901 void InstanceKlass::call_class_initializer(TRAPS) {
1902   if (ReplayCompiles &&
1903       (ReplaySuppressInitializers == 1 ||
1904        (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1905     // Hide the existence of the initializer for the purpose of replaying the compile
1906     return;
1907   }
1908 
1909 #if INCLUDE_CDS
1910   // This is needed to ensure the consistency of the archived heap objects.
1911   if (has_aot_initialized_mirror() && CDSConfig::is_loading_heap()) {
1912     AOTClassInitializer::call_runtime_setup(THREAD, this);
1913     return;
1914   } else if (has_archived_enum_objs()) {
1915     assert(is_shared(), "must be");

1984 
1985 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1986   InterpreterOopMap* entry_for) {
1987   // Lazily create the _oop_map_cache at first request.
1988   // Load_acquire is needed to safely get instance published with CAS by another thread.
1989   OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1990   if (oop_map_cache == nullptr) {
1991     // Try to install new instance atomically.
1992     oop_map_cache = new OopMapCache();
1993     OopMapCache* other = Atomic::cmpxchg(&_oop_map_cache, (OopMapCache*)nullptr, oop_map_cache);
1994     if (other != nullptr) {
1995       // Someone else managed to install before us, ditch local copy and use the existing one.
1996       delete oop_map_cache;
1997       oop_map_cache = other;
1998     }
1999   }
2000   // _oop_map_cache is constant after init; lookup below does its own locking.
2001   oop_map_cache->lookup(method, bci, entry_for);
2002 }
2003 




2004 
2005 FieldInfo InstanceKlass::field(int index) const {
2006   for (AllFieldStream fs(this); !fs.done(); fs.next()) {
2007     if (fs.index() == index) {
2008       return fs.to_FieldInfo();
2009     }
2010   }
2011   fatal("Field not found");
2012   return FieldInfo();
2013 }
2014 
2015 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
2016   JavaFieldStream fs(this);
2017   if (fs.lookup(name, sig)) {
2018     assert(fs.name() == name, "name must match");
2019     assert(fs.signature() == sig, "signature must match");
2020     fd->reinitialize(const_cast<InstanceKlass*>(this), fs.to_FieldInfo());
2021     return true;
2022   }
2023   return false;

2064 
2065 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
2066   // search order according to newest JVM spec (5.4.3.2, p.167).
2067   // 1) search for field in current klass
2068   if (find_local_field(name, sig, fd)) {
2069     if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
2070   }
2071   // 2) search for field recursively in direct superinterfaces
2072   if (is_static) {
2073     Klass* intf = find_interface_field(name, sig, fd);
2074     if (intf != nullptr) return intf;
2075   }
2076   // 3) apply field lookup recursively if superclass exists
2077   { Klass* supr = super();
2078     if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
2079   }
2080   // 4) otherwise field lookup fails
2081   return nullptr;
2082 }
2083 
2084 bool InstanceKlass::contains_field_offset(int offset) {
2085   if (this->is_inline_klass()) {
2086     InlineKlass* vk = InlineKlass::cast(this);
2087     return offset >= vk->payload_offset() && offset < (vk->payload_offset() + vk->payload_size_in_bytes());
2088   } else {
2089     fieldDescriptor fd;
2090     return find_field_from_offset(offset, false, &fd);
2091   }
2092 }
2093 
2094 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
2095   for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
2096     if (fs.offset() == offset) {
2097       fd->reinitialize(const_cast<InstanceKlass*>(this), fs.to_FieldInfo());
2098       if (fd->is_static() == is_static) return true;
2099     }
2100   }
2101   return false;
2102 }
2103 
2104 
2105 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
2106   Klass* klass = const_cast<InstanceKlass*>(this);
2107   while (klass != nullptr) {
2108     if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
2109       return true;
2110     }
2111     klass = klass->super();
2112   }

2456 }
2457 
2458 // uncached_lookup_method searches both the local class methods array and all
2459 // superclasses methods arrays, skipping any overpass methods in superclasses,
2460 // and possibly skipping private methods.
2461 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2462                                               const Symbol* signature,
2463                                               OverpassLookupMode overpass_mode,
2464                                               PrivateLookupMode private_mode) const {
2465   OverpassLookupMode overpass_local_mode = overpass_mode;
2466   const Klass* klass = this;
2467   while (klass != nullptr) {
2468     Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2469                                                                         signature,
2470                                                                         overpass_local_mode,
2471                                                                         StaticLookupMode::find,
2472                                                                         private_mode);
2473     if (method != nullptr) {
2474       return method;
2475     }
2476     if (name == vmSymbols::object_initializer_name()) {
2477       break;  // <init> is never inherited
2478     }
2479     klass = klass->super();
2480     overpass_local_mode = OverpassLookupMode::skip;   // Always ignore overpass methods in superclasses
2481   }
2482   return nullptr;
2483 }
2484 
2485 #ifdef ASSERT
2486 // search through class hierarchy and return true if this class or
2487 // one of the superclasses was redefined
2488 bool InstanceKlass::has_redefined_this_or_super() const {
2489   const Klass* klass = this;
2490   while (klass != nullptr) {
2491     if (InstanceKlass::cast(klass)->has_been_redefined()) {
2492       return true;
2493     }
2494     klass = klass->super();
2495   }
2496   return false;
2497 }
2498 #endif

2871     int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2872 
2873     int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2874                          / itableOffsetEntry::size();
2875 
2876     for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2877       if (ioe->interface_klass() != nullptr) {
2878         it->push(ioe->interface_klass_addr());
2879         itableMethodEntry* ime = ioe->first_method_entry(this);
2880         int n = klassItable::method_count_for_interface(ioe->interface_klass());
2881         for (int index = 0; index < n; index ++) {
2882           it->push(ime[index].method_addr());
2883         }
2884       }
2885     }
2886   }
2887 
2888   it->push(&_nest_host);
2889   it->push(&_nest_members);
2890   it->push(&_permitted_subclasses);
2891   it->push(&_loadable_descriptors);
2892   it->push(&_record_components);
2893   it->push(&_inline_layout_info_array, MetaspaceClosure::_writable);
2894 }
2895 
2896 #if INCLUDE_CDS
2897 void InstanceKlass::remove_unshareable_info() {
2898 
2899   if (is_linked()) {
2900     assert(can_be_verified_at_dumptime(), "must be");
2901     // Remember this so we can avoid walking the hierarchy at runtime.
2902     set_verified_at_dump_time();
2903   }
2904 
2905   _misc_flags.set_has_init_deps_processed(false);
2906 
2907   Klass::remove_unshareable_info();
2908 
2909   if (SystemDictionaryShared::has_class_failed_verification(this)) {
2910     // Classes are attempted to link during dumping and may fail,
2911     // but these classes are still in the dictionary and class list in CLD.
2912     // If the class has failed verification, there is nothing else to remove.
2913     return;

2921 
2922   { // Otherwise this needs to take out the Compile_lock.
2923     assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2924     init_implementor();
2925   }
2926 
2927   // Call remove_unshareable_info() on other objects that belong to this class, except
2928   // for constants()->remove_unshareable_info(), which is called in a separate pass in
2929   // ArchiveBuilder::make_klasses_shareable(),
2930 
2931   for (int i = 0; i < methods()->length(); i++) {
2932     Method* m = methods()->at(i);
2933     m->remove_unshareable_info();
2934   }
2935 
2936   // do array classes also.
2937   if (array_klasses() != nullptr) {
2938     array_klasses()->remove_unshareable_info();
2939   }
2940 
2941   // These are not allocated from metaspace. They are safe to set to nullptr.
2942   _source_debug_extension = nullptr;
2943   _dep_context = nullptr;
2944   _osr_nmethods_head = nullptr;
2945 #if INCLUDE_JVMTI
2946   _breakpoints = nullptr;
2947   _previous_versions = nullptr;
2948   _cached_class_file = nullptr;
2949   _jvmti_cached_class_field_map = nullptr;
2950 #endif
2951 
2952   _init_thread = nullptr;
2953   _methods_jmethod_ids = nullptr;
2954   _jni_ids = nullptr;
2955   _oop_map_cache = nullptr;
2956   if (CDSConfig::is_dumping_method_handles() && HeapShared::is_lambda_proxy_klass(this)) {
2957     // keep _nest_host
2958   } else {
2959     // clear _nest_host to ensure re-load at runtime
2960     _nest_host = nullptr;
2961   }

3012 void InstanceKlass::compute_has_loops_flag_for_methods() {
3013   Array<Method*>* methods = this->methods();
3014   for (int index = 0; index < methods->length(); ++index) {
3015     Method* m = methods->at(index);
3016     if (!m->is_overpass()) { // work around JDK-8305771
3017       m->compute_has_loops_flag();
3018     }
3019   }
3020 }
3021 
3022 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
3023                                              PackageEntry* pkg_entry, TRAPS) {
3024   // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
3025   // before the InstanceKlass is added to the SystemDictionary. Make
3026   // sure the current state is <loaded.
3027   assert(!is_loaded(), "invalid init state");
3028   assert(!shared_loading_failed(), "Must not try to load failed class again");
3029   set_package(loader_data, pkg_entry, CHECK);
3030   Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
3031 
3032   if (is_inline_klass()) {
3033     InlineKlass::cast(this)->initialize_calling_convention(CHECK);
3034   }
3035 
3036   Array<Method*>* methods = this->methods();
3037   int num_methods = methods->length();
3038   for (int index = 0; index < num_methods; ++index) {
3039     methods->at(index)->restore_unshareable_info(CHECK);
3040   }
3041 #if INCLUDE_JVMTI
3042   if (JvmtiExport::has_redefined_a_class()) {
3043     // Reinitialize vtable because RedefineClasses may have changed some
3044     // entries in this vtable for super classes so the CDS vtable might
3045     // point to old or obsolete entries.  RedefineClasses doesn't fix up
3046     // vtables in the shared system dictionary, only the main one.
3047     // It also redefines the itable too so fix that too.
3048     // First fix any default methods that point to a super class that may
3049     // have been redefined.
3050     bool trace_name_printed = false;
3051     adjust_default_methods(&trace_name_printed);
3052     if (verified_at_dump_time()) {
3053       // Initialize vtable and itable for classes which can be verified at dump time.
3054       // Unlinked classes such as old classes with major version < 50 cannot be verified
3055       // at dump time.
3056       vtable().initialize_vtable();
3057       itable().initialize_itable();
3058     }
3059   }
3060 #endif // INCLUDE_JVMTI
3061 
3062   // restore constant pool resolved references
3063   constants()->restore_unshareable_info(CHECK);
3064 
3065   if (array_klasses() != nullptr) {
3066     // To get a consistent list of classes we need MultiArray_lock to ensure
3067     // array classes aren't observed while they are being restored.
3068     RecursiveLocker rl(MultiArray_lock, THREAD);
3069     assert(this == ObjArrayKlass::cast(array_klasses())->bottom_klass(), "sanity");
3070     // Array classes have null protection domain.
3071     // --> see ArrayKlass::complete_create_array_klass()
3072     if (class_loader_data() == nullptr) {
3073       ResourceMark rm(THREAD);
3074       log_debug(cds)("  loader_data %s ", loader_data == nullptr ? "nullptr" : "non null");
3075       log_debug(cds)("  this %s array_klasses %s ", this->name()->as_C_string(), array_klasses()->name()->as_C_string());
3076     }
3077     assert(!array_klasses()->is_refined_objArray_klass(), "must be non-refined objarrayklass");
3078     array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
3079   }
3080 
3081   // Initialize @ValueBased class annotation if not already set in the archived klass.
3082   if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation() && !is_value_based()) {
3083     set_is_value_based();
3084   }
3085 
3086   DEBUG_ONLY(FieldInfoStream::validate_search_table(_constants, _fieldinfo_stream, _fieldinfo_search_table));
3087 }
3088 
3089 // Check if a class or any of its supertypes has a version older than 50.
3090 // CDS will not perform verification of old classes during dump time because
3091 // without changing the old verifier, the verification constraint cannot be
3092 // retrieved during dump time.
3093 // Verification of archived old classes will be performed during run time.
3094 bool InstanceKlass::can_be_verified_at_dumptime() const {
3095   if (MetaspaceShared::is_in_shared_metaspace(this)) {
3096     // This is a class that was dumped into the base archive, so we know
3097     // it was verified at dump time.

3211     constants()->release_C_heap_structures();
3212   }
3213 }
3214 
3215 // The constant pool is on stack if any of the methods are executing or
3216 // referenced by handles.
3217 bool InstanceKlass::on_stack() const {
3218   return _constants->on_stack();
3219 }
3220 
3221 Symbol* InstanceKlass::source_file_name() const               { return _constants->source_file_name(); }
3222 u2 InstanceKlass::source_file_name_index() const              { return _constants->source_file_name_index(); }
3223 void InstanceKlass::set_source_file_name_index(u2 sourcefile_index) { _constants->set_source_file_name_index(sourcefile_index); }
3224 
3225 // minor and major version numbers of class file
3226 u2 InstanceKlass::minor_version() const                 { return _constants->minor_version(); }
3227 void InstanceKlass::set_minor_version(u2 minor_version) { _constants->set_minor_version(minor_version); }
3228 u2 InstanceKlass::major_version() const                 { return _constants->major_version(); }
3229 void InstanceKlass::set_major_version(u2 major_version) { _constants->set_major_version(major_version); }
3230 
3231 bool InstanceKlass::supports_inline_types() const {
3232   return major_version() >= Verifier::VALUE_TYPES_MAJOR_VERSION && minor_version() == Verifier::JAVA_PREVIEW_MINOR_VERSION;
3233 }
3234 
3235 const InstanceKlass* InstanceKlass::get_klass_version(int version) const {
3236   for (const InstanceKlass* ik = this; ik != nullptr; ik = ik->previous_versions()) {
3237     if (ik->constants()->version() == version) {
3238       return ik;
3239     }
3240   }
3241   return nullptr;
3242 }
3243 
3244 void InstanceKlass::set_source_debug_extension(const char* array, int length) {
3245   if (array == nullptr) {
3246     _source_debug_extension = nullptr;
3247   } else {
3248     // Adding one to the attribute length in order to store a null terminator
3249     // character could cause an overflow because the attribute length is
3250     // already coded with an u4 in the classfile, but in practice, it's
3251     // unlikely to happen.
3252     assert((length+1) > length, "Overflow checking");
3253     char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
3254     for (int i = 0; i < length; i++) {
3255       sde[i] = array[i];
3256     }
3257     sde[length] = '\0';
3258     _source_debug_extension = sde;
3259   }
3260 }
3261 
3262 Symbol* InstanceKlass::generic_signature() const                   { return _constants->generic_signature(); }
3263 u2 InstanceKlass::generic_signature_index() const                  { return _constants->generic_signature_index(); }
3264 void InstanceKlass::set_generic_signature_index(u2 sig_index)      { _constants->set_generic_signature_index(sig_index); }
3265 
3266 const char* InstanceKlass::signature_name() const {
3267   return signature_name_of_carrier(JVM_SIGNATURE_CLASS);
3268 }
3269 
3270 const char* InstanceKlass::signature_name_of_carrier(char c) const {
3271   // Get the internal name as a c string
3272   const char* src = (const char*) (name()->as_C_string());
3273   const int src_length = (int)strlen(src);
3274 
3275   char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
3276 
3277   // Add L or Q as type indicator
3278   int dest_index = 0;
3279   dest[dest_index++] = c;
3280 
3281   // Add the actual class name
3282   for (int src_index = 0; src_index < src_length; ) {
3283     dest[dest_index++] = src[src_index++];
3284   }
3285 
3286   if (is_hidden()) { // Replace the last '+' with a '.'.
3287     for (int index = (int)src_length; index > 0; index--) {
3288       if (dest[index] == '+') {
3289         dest[index] = JVM_SIGNATURE_DOT;
3290         break;
3291       }
3292     }
3293   }
3294 
3295   // Add the semicolon and the null
3296   dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
3297   dest[dest_index] = '\0';
3298   return dest;
3299 }

3540 bool InstanceKlass::find_inner_classes_attr(int* ooff, int* noff, TRAPS) const {
3541   constantPoolHandle i_cp(THREAD, constants());
3542   for (InnerClassesIterator iter(this); !iter.done(); iter.next()) {
3543     int ioff = iter.inner_class_info_index();
3544     if (ioff != 0) {
3545       // Check to see if the name matches the class we're looking for
3546       // before attempting to find the class.
3547       if (i_cp->klass_name_at_matches(this, ioff)) {
3548         Klass* inner_klass = i_cp->klass_at(ioff, CHECK_false);
3549         if (this == inner_klass) {
3550           *ooff = iter.outer_class_info_index();
3551           *noff = iter.inner_name_index();
3552           return true;
3553         }
3554       }
3555     }
3556   }
3557   return false;
3558 }
3559 
3560 void InstanceKlass::check_can_be_annotated_with_NullRestricted(InstanceKlass* type, Symbol* container_klass_name, TRAPS) {
3561   assert(type->is_instance_klass(), "Sanity check");
3562   if (type->is_identity_class()) {
3563     ResourceMark rm(THREAD);
3564     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
3565               err_msg("Class %s expects class %s to be a value class, but it is an identity class",
3566               container_klass_name->as_C_string(),
3567               type->external_name()));
3568   }
3569 
3570   if (type->is_abstract()) {
3571     ResourceMark rm(THREAD);
3572     THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
3573               err_msg("Class %s expects class %s to be concrete value type, but it is an abstract class",
3574               container_klass_name->as_C_string(),
3575               type->external_name()));
3576   }
3577 }
3578 
3579 InstanceKlass* InstanceKlass::compute_enclosing_class(bool* inner_is_member, TRAPS) const {
3580   InstanceKlass* outer_klass = nullptr;
3581   *inner_is_member = false;
3582   int ooff = 0, noff = 0;
3583   bool has_inner_classes_attr = find_inner_classes_attr(&ooff, &noff, THREAD);
3584   if (has_inner_classes_attr) {
3585     constantPoolHandle i_cp(THREAD, constants());
3586     if (ooff != 0) {
3587       Klass* ok = i_cp->klass_at(ooff, CHECK_NULL);
3588       if (!ok->is_instance_klass()) {
3589         // If the outer class is not an instance klass then it cannot have
3590         // declared any inner classes.
3591         ResourceMark rm(THREAD);
3592         // Names are all known to be < 64k so we know this formatted message is not excessively large.
3593         Exceptions::fthrow(
3594           THREAD_AND_LOCATION,
3595           vmSymbols::java_lang_IncompatibleClassChangeError(),
3596           "%s and %s disagree on InnerClasses attribute",
3597           ok->external_name(),
3598           external_name());

3625 u2 InstanceKlass::compute_modifier_flags() const {
3626   u2 access = access_flags().as_unsigned_short();
3627 
3628   // But check if it happens to be member class.
3629   InnerClassesIterator iter(this);
3630   for (; !iter.done(); iter.next()) {
3631     int ioff = iter.inner_class_info_index();
3632     // Inner class attribute can be zero, skip it.
3633     // Strange but true:  JVM spec. allows null inner class refs.
3634     if (ioff == 0) continue;
3635 
3636     // only look at classes that are already loaded
3637     // since we are looking for the flags for our self.
3638     Symbol* inner_name = constants()->klass_name_at(ioff);
3639     if (name() == inner_name) {
3640       // This is really a member class.
3641       access = iter.inner_access_flags();
3642       break;
3643     }
3644   }
3645   return access;

3646 }
3647 
3648 jint InstanceKlass::jvmti_class_status() const {
3649   jint result = 0;
3650 
3651   if (is_linked()) {
3652     result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3653   }
3654 
3655   if (is_initialized()) {
3656     assert(is_linked(), "Class status is not consistent");
3657     result |= JVMTI_CLASS_STATUS_INITIALIZED;
3658   }
3659   if (is_in_error_state()) {
3660     result |= JVMTI_CLASS_STATUS_ERROR;
3661   }
3662   return result;
3663 }
3664 
3665 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {

3879     }
3880     osr = osr->osr_link();
3881   }
3882 
3883   assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3884   if (best != nullptr && best->comp_level() >= comp_level) {
3885     return best;
3886   }
3887   return nullptr;
3888 }
3889 
3890 // -----------------------------------------------------------------------------------------------------
3891 // Printing
3892 
3893 #define BULLET  " - "
3894 
3895 static const char* state_names[] = {
3896   "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
3897 };
3898 
3899 static void print_vtable(address self, intptr_t* start, int len, outputStream* st) {
3900   ResourceMark rm;
3901   int* forward_refs = NEW_RESOURCE_ARRAY(int, len);
3902   for (int i = 0; i < len; i++)  forward_refs[i] = 0;
3903   for (int i = 0; i < len; i++) {
3904     intptr_t e = start[i];
3905     st->print("%d : " INTPTR_FORMAT, i, e);
3906     if (forward_refs[i] != 0) {
3907       int from = forward_refs[i];
3908       int off = (int) start[from];
3909       st->print(" (offset %d <= [%d])", off, from);
3910     }
3911     if (MetaspaceObj::is_valid((Metadata*)e)) {
3912       st->print(" ");
3913       ((Metadata*)e)->print_value_on(st);
3914     } else if (self != nullptr && e > 0 && e < 0x10000) {
3915       address location = self + e;
3916       int index = (int)((intptr_t*)location - start);
3917       st->print(" (offset %d => [%d])", (int)e, index);
3918       if (index >= 0 && index < len)
3919         forward_refs[index] = i;
3920     }
3921     st->cr();
3922   }
3923 }
3924 
3925 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3926   return print_vtable(nullptr, reinterpret_cast<intptr_t*>(start), len, st);
3927 }
3928 
3929 template<typename T>
3930  static void print_array_on(outputStream* st, Array<T>* array) {
3931    if (array == nullptr) { st->print_cr("nullptr"); return; }
3932    array->print_value_on(st); st->cr();
3933    if (Verbose || WizardMode) {
3934      for (int i = 0; i < array->length(); i++) {
3935        st->print("%d : ", i); array->at(i)->print_value_on(st); st->cr();
3936      }
3937    }
3938  }
3939 
3940 static void print_array_on(outputStream* st, Array<int>* array) {
3941   if (array == nullptr) { st->print_cr("nullptr"); return; }
3942   array->print_value_on(st); st->cr();
3943   if (Verbose || WizardMode) {
3944     for (int i = 0; i < array->length(); i++) {
3945       st->print("%d : %d", i, array->at(i)); st->cr();
3946     }
3947   }
3948 }
3949 
3950 const char* InstanceKlass::init_state_name() const {
3951   return state_names[init_state()];
3952 }
3953 
3954 void InstanceKlass::print_on(outputStream* st) const {
3955   assert(is_klass(), "must be klass");
3956   Klass::print_on(st);
3957 
3958   st->print(BULLET"instance size:     %d", size_helper());                        st->cr();
3959   st->print(BULLET"klass size:        %d", size());                               st->cr();
3960   st->print(BULLET"access:            "); access_flags().print_on(st);            st->cr();
3961   st->print(BULLET"flags:             "); _misc_flags.print_on(st);               st->cr();
3962   st->print(BULLET"state:             "); st->print_cr("%s", init_state_name());
3963   st->print(BULLET"name:              "); name()->print_value_on(st);             st->cr();
3964   st->print(BULLET"super:             "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3965   st->print(BULLET"sub:               ");
3966   Klass* sub = subklass();
3967   int n;
3968   for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3969     if (n < MaxSubklassPrintSize) {
3970       sub->print_value_on(st);
3971       st->print("   ");
3972     }
3973   }
3974   if (n >= MaxSubklassPrintSize) st->print("(%zd more klasses...)", n - MaxSubklassPrintSize);
3975   st->cr();
3976 
3977   if (is_interface()) {
3978     st->print_cr(BULLET"nof implementors:  %d", nof_implementors());
3979     if (nof_implementors() == 1) {
3980       st->print_cr(BULLET"implementor:    ");
3981       st->print("   ");
3982       implementor()->print_value_on(st);
3983       st->cr();
3984     }
3985   }
3986 
3987   st->print(BULLET"arrays:            "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3988   st->print(BULLET"methods:           "); print_array_on(st, methods());
3989   st->print(BULLET"method ordering:   "); print_array_on(st, method_ordering());






3990   if (default_methods() != nullptr) {
3991     st->print(BULLET"default_methods:   "); print_array_on(st, default_methods());






3992   }
3993   print_on_maybe_null(st, BULLET"default vtable indices:   ", default_vtable_indices());
3994   st->print(BULLET"local interfaces:  "); local_interfaces()->print_value_on(st);      st->cr();
3995   st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3996 
3997   st->print(BULLET"secondary supers: "); secondary_supers()->print_value_on(st); st->cr();
3998 
3999   st->print(BULLET"hash_slot:         %d", hash_slot()); st->cr();
4000   st->print(BULLET"secondary bitmap: " UINTX_FORMAT_X_0, _secondary_supers_bitmap); st->cr();
4001 
4002   if (secondary_supers() != nullptr) {
4003     if (Verbose) {
4004       bool is_hashed = (_secondary_supers_bitmap != SECONDARY_SUPERS_BITMAP_FULL);
4005       st->print_cr(BULLET"---- secondary supers (%d words):", _secondary_supers->length());
4006       for (int i = 0; i < _secondary_supers->length(); i++) {
4007         ResourceMark rm; // for external_name()
4008         Klass* secondary_super = _secondary_supers->at(i);
4009         st->print(BULLET"%2d:", i);
4010         if (is_hashed) {
4011           int home_slot = compute_home_slot(secondary_super, _secondary_supers_bitmap);

4031   print_on_maybe_null(st, BULLET"field type annotations:  ", fields_type_annotations());
4032   {
4033     bool have_pv = false;
4034     // previous versions are linked together through the InstanceKlass
4035     for (InstanceKlass* pv_node = previous_versions();
4036          pv_node != nullptr;
4037          pv_node = pv_node->previous_versions()) {
4038       if (!have_pv)
4039         st->print(BULLET"previous version:  ");
4040       have_pv = true;
4041       pv_node->constants()->print_value_on(st);
4042     }
4043     if (have_pv) st->cr();
4044   }
4045 
4046   print_on_maybe_null(st, BULLET"generic signature: ", generic_signature());
4047   st->print(BULLET"inner classes:     "); inner_classes()->print_value_on(st);     st->cr();
4048   st->print(BULLET"nest members:     "); nest_members()->print_value_on(st);     st->cr();
4049   print_on_maybe_null(st, BULLET"record components:     ", record_components());
4050   st->print(BULLET"permitted subclasses:     "); permitted_subclasses()->print_value_on(st);     st->cr();
4051   st->print(BULLET"loadable descriptors:     "); loadable_descriptors()->print_value_on(st); st->cr();
4052   if (java_mirror() != nullptr) {
4053     st->print(BULLET"java mirror:       ");
4054     java_mirror()->print_value_on(st);
4055     st->cr();
4056   } else {
4057     st->print_cr(BULLET"java mirror:       null");
4058   }
4059   st->print(BULLET"vtable length      %d  (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
4060   if (vtable_length() > 0 && (Verbose || WizardMode))  print_vtable(start_of_vtable(), vtable_length(), st);
4061   st->print(BULLET"itable length      %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
4062   if (itable_length() > 0 && (Verbose || WizardMode))  print_vtable(nullptr, start_of_itable(), itable_length(), st);
4063   st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
4064 
4065   FieldPrinter print_static_field(st);
4066   ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
4067   st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
4068   FieldPrinter print_nonstatic_field(st);
4069   InstanceKlass* ik = const_cast<InstanceKlass*>(this);
4070   ik->print_nonstatic_fields(&print_nonstatic_field);
4071 
4072   st->print(BULLET"non-static oop maps (%d entries): ", nonstatic_oop_map_count());
4073   OopMapBlock* map     = start_of_nonstatic_oop_maps();
4074   OopMapBlock* end_map = map + nonstatic_oop_map_count();
4075   while (map < end_map) {
4076     st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
4077     map++;
4078   }
4079   st->cr();
4080 
4081   if (fieldinfo_search_table() != nullptr) {
4082     st->print_cr(BULLET"---- field info search table:");
4083     FieldInfoStream::print_search_table(st, _constants, _fieldinfo_stream, _fieldinfo_search_table);
4084   }
4085 }
4086 
4087 void InstanceKlass::print_value_on(outputStream* st) const {
4088   assert(is_klass(), "must be klass");
4089   if (Verbose || WizardMode)  access_flags().print_on(st);
4090   name()->print_value_on(st);
4091 }
4092 
4093 void FieldPrinter::do_field(fieldDescriptor* fd) {
4094   for (int i = 0; i < _indent; i++) _st->print("  ");
4095   _st->print(BULLET);
4096    if (_obj == nullptr) {
4097      fd->print_on(_st, _base_offset);
4098      _st->cr();
4099    } else {
4100      fd->print_on_for(_st, _obj, _indent, _base_offset);
4101      if (!fd->field_flags().is_flat()) _st->cr();
4102    }
4103 }
4104 
4105 
4106 void InstanceKlass::oop_print_on(oop obj, outputStream* st, int indent, int base_offset) {
4107   Klass::oop_print_on(obj, st);
4108 
4109   if (this == vmClasses::String_klass()) {
4110     typeArrayOop value  = java_lang_String::value(obj);
4111     juint        length = java_lang_String::length(obj);
4112     if (value != nullptr &&
4113         value->is_typeArray() &&
4114         length <= (juint) value->length()) {
4115       st->print(BULLET"string: ");
4116       java_lang_String::print(obj, st);
4117       st->cr();
4118     }
4119   }
4120 
4121   st->print_cr(BULLET"---- fields (total size %zu words):", oop_size(obj));
4122   FieldPrinter print_field(st, obj, indent, base_offset);
4123   print_nonstatic_fields(&print_field);
4124 
4125   if (this == vmClasses::Class_klass()) {
4126     st->print(BULLET"signature: ");
4127     java_lang_Class::print_signature(obj, st);
4128     st->cr();
4129     Klass* real_klass = java_lang_Class::as_Klass(obj);
4130     if (real_klass != nullptr && real_klass->is_instance_klass()) {
4131       st->print_cr(BULLET"---- static fields (%d):", java_lang_Class::static_oop_field_count(obj));
4132       InstanceKlass::cast(real_klass)->do_local_static_fields(&print_field);
4133     }
4134   } else if (this == vmClasses::MethodType_klass()) {
4135     st->print(BULLET"signature: ");
4136     java_lang_invoke_MethodType::print_signature(obj, st);
4137     st->cr();
4138   }
4139 }
4140 
4141 #ifndef PRODUCT
4142 
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