55 #include "logging/logStream.hpp"
56 #include "memory/allocation.inline.hpp"
57 #include "memory/iterator.inline.hpp"
58 #include "memory/metadataFactory.hpp"
59 #include "memory/metaspaceClosure.hpp"
60 #include "memory/oopFactory.hpp"
61 #include "memory/resourceArea.hpp"
62 #include "memory/universe.hpp"
63 #include "oops/fieldStreams.inline.hpp"
64 #include "oops/constantPool.hpp"
65 #include "oops/instanceClassLoaderKlass.hpp"
66 #include "oops/instanceKlass.inline.hpp"
67 #include "oops/instanceMirrorKlass.hpp"
68 #include "oops/instanceOop.hpp"
69 #include "oops/instanceStackChunkKlass.hpp"
70 #include "oops/klass.inline.hpp"
71 #include "oops/method.hpp"
72 #include "oops/oop.inline.hpp"
73 #include "oops/recordComponent.hpp"
74 #include "oops/symbol.hpp"
75 #include "prims/jvmtiExport.hpp"
76 #include "prims/jvmtiRedefineClasses.hpp"
77 #include "prims/jvmtiThreadState.hpp"
78 #include "prims/methodComparator.hpp"
79 #include "runtime/arguments.hpp"
80 #include "runtime/deoptimization.hpp"
81 #include "runtime/atomic.hpp"
82 #include "runtime/fieldDescriptor.inline.hpp"
83 #include "runtime/handles.inline.hpp"
84 #include "runtime/javaCalls.hpp"
85 #include "runtime/javaThread.inline.hpp"
86 #include "runtime/mutexLocker.hpp"
87 #include "runtime/orderAccess.hpp"
88 #include "runtime/os.inline.hpp"
89 #include "runtime/reflection.hpp"
90 #include "runtime/synchronizer.hpp"
91 #include "runtime/threads.hpp"
92 #include "services/classLoadingService.hpp"
93 #include "services/finalizerService.hpp"
94 #include "services/threadService.hpp"
131 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait) \
132 { \
133 char* data = nullptr; \
134 int len = 0; \
135 Symbol* clss_name = name(); \
136 if (clss_name != nullptr) { \
137 data = (char*)clss_name->bytes(); \
138 len = clss_name->utf8_length(); \
139 } \
140 HOTSPOT_CLASS_INITIALIZATION_##type( \
141 data, len, (void*)class_loader(), thread_type, wait); \
142 }
143
144 #else // ndef DTRACE_ENABLED
145
146 #define DTRACE_CLASSINIT_PROBE(type, thread_type)
147 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait)
148
149 #endif // ndef DTRACE_ENABLED
150
151 bool InstanceKlass::_finalization_enabled = true;
152
153 static inline bool is_class_loader(const Symbol* class_name,
154 const ClassFileParser& parser) {
155 assert(class_name != nullptr, "invariant");
156
157 if (class_name == vmSymbols::java_lang_ClassLoader()) {
158 return true;
159 }
160
161 if (vmClasses::ClassLoader_klass_loaded()) {
162 const Klass* const super_klass = parser.super_klass();
163 if (super_klass != nullptr) {
164 if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
165 return true;
166 }
167 }
168 }
169 return false;
170 }
171
172 static inline bool is_stack_chunk_class(const Symbol* class_name,
173 const ClassLoaderData* loader_data) {
174 return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
175 loader_data->is_the_null_class_loader_data());
176 }
177
178 // private: called to verify that k is a static member of this nest.
179 // We know that k is an instance class in the same package and hence the
180 // same classloader.
181 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
182 assert(!is_hidden(), "unexpected hidden class");
183 if (_nest_members == nullptr || _nest_members == Universe::the_empty_short_array()) {
184 if (log_is_enabled(Trace, class, nestmates)) {
185 ResourceMark rm(current);
186 log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
187 k->external_name(), this->external_name());
188 }
189 return false;
190 }
191
429 }
430
431 const char* InstanceKlass::nest_host_error() {
432 if (_nest_host_index == 0) {
433 return nullptr;
434 } else {
435 constantPoolHandle cph(Thread::current(), constants());
436 return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
437 }
438 }
439
440 void* InstanceKlass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size,
441 bool use_class_space, TRAPS) throw() {
442 return Metaspace::allocate(loader_data, word_size, ClassType, use_class_space, THREAD);
443 }
444
445 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
446 const int size = InstanceKlass::size(parser.vtable_size(),
447 parser.itable_size(),
448 nonstatic_oop_map_size(parser.total_oop_map_count()),
449 parser.is_interface());
450
451 const Symbol* const class_name = parser.class_name();
452 assert(class_name != nullptr, "invariant");
453 ClassLoaderData* loader_data = parser.loader_data();
454 assert(loader_data != nullptr, "invariant");
455
456 InstanceKlass* ik;
457 const bool use_class_space = !parser.is_interface() && !parser.is_abstract();
458
459 // Allocation
460 if (parser.is_instance_ref_klass()) {
461 // java.lang.ref.Reference
462 ik = new (loader_data, size, use_class_space, THREAD) InstanceRefKlass(parser);
463 } else if (class_name == vmSymbols::java_lang_Class()) {
464 // mirror - java.lang.Class
465 ik = new (loader_data, size, use_class_space, THREAD) InstanceMirrorKlass(parser);
466 } else if (is_stack_chunk_class(class_name, loader_data)) {
467 // stack chunk
468 ik = new (loader_data, size, use_class_space, THREAD) InstanceStackChunkKlass(parser);
469 } else if (is_class_loader(class_name, parser)) {
470 // class loader - java.lang.ClassLoader
471 ik = new (loader_data, size, use_class_space, THREAD) InstanceClassLoaderKlass(parser);
472 } else {
473 // normal
474 ik = new (loader_data, size, use_class_space, THREAD) InstanceKlass(parser);
475 }
476
477 // Check for pending exception before adding to the loader data and incrementing
478 // class count. Can get OOM here.
479 if (HAS_PENDING_EXCEPTION) {
480 return nullptr;
481 }
482
483 return ik;
484 }
485
486
487 // copy method ordering from resource area to Metaspace
488 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
489 if (m != nullptr) {
490 // allocate a new array and copy contents (memcpy?)
491 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
492 for (int i = 0; i < m->length(); i++) {
493 _method_ordering->at_put(i, m->at(i));
494 }
495 } else {
496 _method_ordering = Universe::the_empty_int_array();
497 }
498 }
499
500 // create a new array of vtable_indices for default methods
501 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
502 Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
503 assert(default_vtable_indices() == nullptr, "only create once");
504 set_default_vtable_indices(vtable_indices);
505 return vtable_indices;
506 }
507
508
509 InstanceKlass::InstanceKlass() {
510 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
511 }
512
513 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
514 Klass(kind),
515 _nest_members(nullptr),
516 _nest_host(nullptr),
517 _permitted_subclasses(nullptr),
518 _record_components(nullptr),
519 _static_field_size(parser.static_field_size()),
520 _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
521 _itable_len(parser.itable_size()),
522 _nest_host_index(0),
523 _init_state(allocated),
524 _reference_type(reference_type),
525 _init_thread(nullptr)
526 {
527 set_vtable_length(parser.vtable_size());
528 set_access_flags(parser.access_flags());
529 if (parser.is_hidden()) set_is_hidden();
530 set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
531 false));
532
533 assert(nullptr == _methods, "underlying memory not zeroed?");
534 assert(is_instance_klass(), "is layout incorrect?");
535 assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
536 }
537
538 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
539 Array<Method*>* methods) {
540 if (methods != nullptr && methods != Universe::the_empty_method_array() &&
541 !methods->is_shared()) {
542 for (int i = 0; i < methods->length(); i++) {
543 Method* method = methods->at(i);
544 if (method == nullptr) continue; // maybe null if error processing
545 // Only want to delete methods that are not executing for RedefineClasses.
546 // The previous version will point to them so they're not totally dangling
547 assert (!method->on_stack(), "shouldn't be called with methods on stack");
548 MetadataFactory::free_metadata(loader_data, method);
549 }
550 MetadataFactory::free_array<Method*>(loader_data, methods);
551 }
651 (address)(secondary_supers()) != (address)(transitive_interfaces()) &&
652 !secondary_supers()->is_shared()) {
653 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers());
654 }
655 set_secondary_supers(nullptr);
656
657 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
658 set_transitive_interfaces(nullptr);
659 set_local_interfaces(nullptr);
660
661 if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
662 MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
663 }
664 set_fieldinfo_stream(nullptr);
665
666 if (fields_status() != nullptr && !fields_status()->is_shared()) {
667 MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
668 }
669 set_fields_status(nullptr);
670
671 // If a method from a redefined class is using this constant pool, don't
672 // delete it, yet. The new class's previous version will point to this.
673 if (constants() != nullptr) {
674 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
675 if (!constants()->is_shared()) {
676 MetadataFactory::free_metadata(loader_data, constants());
677 }
678 // Delete any cached resolution errors for the constant pool
679 SystemDictionary::delete_resolution_error(constants());
680
681 set_constants(nullptr);
682 }
683
684 if (inner_classes() != nullptr &&
685 inner_classes() != Universe::the_empty_short_array() &&
686 !inner_classes()->is_shared()) {
687 MetadataFactory::free_array<jushort>(loader_data, inner_classes());
688 }
689 set_inner_classes(nullptr);
690
691 if (nest_members() != nullptr &&
692 nest_members() != Universe::the_empty_short_array() &&
693 !nest_members()->is_shared()) {
694 MetadataFactory::free_array<jushort>(loader_data, nest_members());
695 }
696 set_nest_members(nullptr);
697
698 if (permitted_subclasses() != nullptr &&
699 permitted_subclasses() != Universe::the_empty_short_array() &&
700 !permitted_subclasses()->is_shared()) {
701 MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
702 }
703 set_permitted_subclasses(nullptr);
704
705 // We should deallocate the Annotations instance if it's not in shared spaces.
706 if (annotations() != nullptr && !annotations()->is_shared()) {
707 MetadataFactory::free_metadata(loader_data, annotations());
708 }
709 set_annotations(nullptr);
710
711 SystemDictionaryShared::handle_class_unloading(this);
712
713 #if INCLUDE_CDS_JAVA_HEAP
714 if (CDSConfig::is_dumping_heap()) {
715 HeapShared::remove_scratch_objects(this);
716 }
717 #endif
718 }
719
720 bool InstanceKlass::is_record() const {
721 return _record_components != nullptr &&
722 is_final() &&
723 java_super() == vmClasses::Record_klass();
724 }
843 vmSymbols::java_lang_IncompatibleClassChangeError(),
844 "class %s has interface %s as super class",
845 external_name(),
846 super_klass->external_name()
847 );
848 return false;
849 }
850
851 InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
852 ik_super->link_class_impl(CHECK_false);
853 }
854
855 // link all interfaces implemented by this class before linking this class
856 Array<InstanceKlass*>* interfaces = local_interfaces();
857 int num_interfaces = interfaces->length();
858 for (int index = 0; index < num_interfaces; index++) {
859 InstanceKlass* interk = interfaces->at(index);
860 interk->link_class_impl(CHECK_false);
861 }
862
863 // in case the class is linked in the process of linking its superclasses
864 if (is_linked()) {
865 return true;
866 }
867
868 // trace only the link time for this klass that includes
869 // the verification time
870 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
871 ClassLoader::perf_class_link_selftime(),
872 ClassLoader::perf_classes_linked(),
873 jt->get_thread_stat()->perf_recursion_counts_addr(),
874 jt->get_thread_stat()->perf_timers_addr(),
875 PerfClassTraceTime::CLASS_LINK);
876
877 // verification & rewriting
878 {
879 HandleMark hm(THREAD);
880 Handle h_init_lock(THREAD, init_lock());
881 ObjectLocker ol(h_init_lock, jt);
882 // rewritten will have been set if loader constraint error found
1147 ss.print("Could not initialize class %s", external_name());
1148 if (cause.is_null()) {
1149 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1150 } else {
1151 THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1152 ss.as_string(), cause);
1153 }
1154 } else {
1155
1156 // Step 6
1157 set_init_state(being_initialized);
1158 set_init_thread(jt);
1159 if (debug_logging_enabled) {
1160 ResourceMark rm(jt);
1161 log_debug(class, init)("Thread \"%s\" is initializing %s",
1162 jt->name(), external_name());
1163 }
1164 }
1165 }
1166
1167 // Step 7
1168 // Next, if C is a class rather than an interface, initialize it's super class and super
1169 // interfaces.
1170 if (!is_interface()) {
1171 Klass* super_klass = super();
1172 if (super_klass != nullptr && super_klass->should_be_initialized()) {
1173 super_klass->initialize(THREAD);
1174 }
1175 // If C implements any interface that declares a non-static, concrete method,
1176 // the initialization of C triggers initialization of its super interfaces.
1177 // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1178 // having a superinterface that declares, non-static, concrete methods
1179 if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1180 initialize_super_interfaces(THREAD);
1181 }
1182
1183 // If any exceptions, complete abruptly, throwing the same exception as above.
1184 if (HAS_PENDING_EXCEPTION) {
1185 Handle e(THREAD, PENDING_EXCEPTION);
1186 CLEAR_PENDING_EXCEPTION;
1187 {
1188 EXCEPTION_MARK;
1189 add_initialization_error(THREAD, e);
1190 // Locks object, set state, and notify all waiting threads
1191 set_initialization_state_and_notify(initialization_error, THREAD);
1192 CLEAR_PENDING_EXCEPTION;
1193 }
1194 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1195 THROW_OOP(e());
1196 }
1197 }
1198
1199
1200 // Step 8
1201 {
1202 DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1203 if (class_initializer() != nullptr) {
1204 // Timer includes any side effects of class initialization (resolution,
1205 // etc), but not recursive entry into call_class_initializer().
1206 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1207 ClassLoader::perf_class_init_selftime(),
1208 ClassLoader::perf_classes_inited(),
1209 jt->get_thread_stat()->perf_recursion_counts_addr(),
1210 jt->get_thread_stat()->perf_timers_addr(),
1211 PerfClassTraceTime::CLASS_CLINIT);
1212 call_class_initializer(THREAD);
1213 } else {
1214 // The elapsed time is so small it's not worth counting.
1215 if (UsePerfData) {
1216 ClassLoader::perf_classes_inited()->inc();
1217 }
1218 call_class_initializer(THREAD);
1219 }
1220 }
1221
1222 // Step 9
1223 if (!HAS_PENDING_EXCEPTION) {
1224 set_initialization_state_and_notify(fully_initialized, CHECK);
1225 debug_only(vtable().verify(tty, true);)
1226 }
1227 else {
1228 // Step 10 and 11
1229 Handle e(THREAD, PENDING_EXCEPTION);
1230 CLEAR_PENDING_EXCEPTION;
1231 // JVMTI has already reported the pending exception
1232 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1233 JvmtiExport::clear_detected_exception(jt);
1234 {
1235 EXCEPTION_MARK;
1236 add_initialization_error(THREAD, e);
1237 set_initialization_state_and_notify(initialization_error, THREAD);
1238 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
1239 // JVMTI has already reported the pending exception
1240 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1241 JvmtiExport::clear_detected_exception(jt);
1242 }
1243 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1244 if (e->is_a(vmClasses::Error_klass())) {
1245 THROW_OOP(e());
1246 } else {
1247 JavaCallArguments args(e);
1248 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1513 ResourceMark rm(THREAD);
1514 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
1515 : vmSymbols::java_lang_InstantiationException(), external_name());
1516 }
1517 if (this == vmClasses::Class_klass()) {
1518 ResourceMark rm(THREAD);
1519 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1520 : vmSymbols::java_lang_IllegalAccessException(), external_name());
1521 }
1522 }
1523
1524 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1525 // Need load-acquire for lock-free read
1526 if (array_klasses_acquire() == nullptr) {
1527
1528 // Recursively lock array allocation
1529 RecursiveLocker rl(MultiArray_lock, THREAD);
1530
1531 // Check if another thread created the array klass while we were waiting for the lock.
1532 if (array_klasses() == nullptr) {
1533 ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, CHECK_NULL);
1534 // use 'release' to pair with lock-free load
1535 release_set_array_klasses(k);
1536 }
1537 }
1538
1539 // array_klasses() will always be set at this point
1540 ObjArrayKlass* ak = array_klasses();
1541 assert(ak != nullptr, "should be set");
1542 return ak->array_klass(n, THREAD);
1543 }
1544
1545 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1546 // Need load-acquire for lock-free read
1547 ObjArrayKlass* oak = array_klasses_acquire();
1548 if (oak == nullptr) {
1549 return nullptr;
1550 } else {
1551 return oak->array_klass_or_null(n);
1552 }
1553 }
1554
1555 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1556 return array_klass(1, THREAD);
1557 }
1558
1559 ArrayKlass* InstanceKlass::array_klass_or_null() {
1560 return array_klass_or_null(1);
1561 }
1562
1563 static int call_class_initializer_counter = 0; // for debugging
1564
1565 Method* InstanceKlass::class_initializer() const {
1566 Method* clinit = find_method(
1567 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1568 if (clinit != nullptr && clinit->has_valid_initializer_flags()) {
1569 return clinit;
1570 }
1571 return nullptr;
1572 }
1573
1574 void InstanceKlass::call_class_initializer(TRAPS) {
1575 if (ReplayCompiles &&
1576 (ReplaySuppressInitializers == 1 ||
1577 (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1578 // Hide the existence of the initializer for the purpose of replaying the compile
1579 return;
1580 }
1581
1582 #if INCLUDE_CDS
1583 // This is needed to ensure the consistency of the archived heap objects.
1584 if (has_archived_enum_objs()) {
1585 assert(is_shared(), "must be");
1586 bool initialized = CDSEnumKlass::initialize_enum_klass(this, CHECK);
1587 if (initialized) {
1588 return;
1612
1613 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1614 InterpreterOopMap* entry_for) {
1615 // Lazily create the _oop_map_cache at first request.
1616 // Load_acquire is needed to safely get instance published with CAS by another thread.
1617 OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1618 if (oop_map_cache == nullptr) {
1619 // Try to install new instance atomically.
1620 oop_map_cache = new OopMapCache();
1621 OopMapCache* other = Atomic::cmpxchg(&_oop_map_cache, (OopMapCache*)nullptr, oop_map_cache);
1622 if (other != nullptr) {
1623 // Someone else managed to install before us, ditch local copy and use the existing one.
1624 delete oop_map_cache;
1625 oop_map_cache = other;
1626 }
1627 }
1628 // _oop_map_cache is constant after init; lookup below does its own locking.
1629 oop_map_cache->lookup(method, bci, entry_for);
1630 }
1631
1632 bool InstanceKlass::contains_field_offset(int offset) {
1633 fieldDescriptor fd;
1634 return find_field_from_offset(offset, false, &fd);
1635 }
1636
1637 FieldInfo InstanceKlass::field(int index) const {
1638 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1639 if (fs.index() == index) {
1640 return fs.to_FieldInfo();
1641 }
1642 }
1643 fatal("Field not found");
1644 return FieldInfo();
1645 }
1646
1647 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1648 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1649 Symbol* f_name = fs.name();
1650 Symbol* f_sig = fs.signature();
1651 if (f_name == name && f_sig == sig) {
1652 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1653 return true;
1654 }
1655 }
1697
1698 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1699 // search order according to newest JVM spec (5.4.3.2, p.167).
1700 // 1) search for field in current klass
1701 if (find_local_field(name, sig, fd)) {
1702 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1703 }
1704 // 2) search for field recursively in direct superinterfaces
1705 if (is_static) {
1706 Klass* intf = find_interface_field(name, sig, fd);
1707 if (intf != nullptr) return intf;
1708 }
1709 // 3) apply field lookup recursively if superclass exists
1710 { Klass* supr = super();
1711 if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1712 }
1713 // 4) otherwise field lookup fails
1714 return nullptr;
1715 }
1716
1717
1718 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1719 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1720 if (fs.offset() == offset) {
1721 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1722 if (fd->is_static() == is_static) return true;
1723 }
1724 }
1725 return false;
1726 }
1727
1728
1729 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1730 Klass* klass = const_cast<InstanceKlass*>(this);
1731 while (klass != nullptr) {
1732 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1733 return true;
1734 }
1735 klass = klass->super();
1736 }
2088 }
2089
2090 // uncached_lookup_method searches both the local class methods array and all
2091 // superclasses methods arrays, skipping any overpass methods in superclasses,
2092 // and possibly skipping private methods.
2093 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2094 const Symbol* signature,
2095 OverpassLookupMode overpass_mode,
2096 PrivateLookupMode private_mode) const {
2097 OverpassLookupMode overpass_local_mode = overpass_mode;
2098 const Klass* klass = this;
2099 while (klass != nullptr) {
2100 Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2101 signature,
2102 overpass_local_mode,
2103 StaticLookupMode::find,
2104 private_mode);
2105 if (method != nullptr) {
2106 return method;
2107 }
2108 klass = klass->super();
2109 overpass_local_mode = OverpassLookupMode::skip; // Always ignore overpass methods in superclasses
2110 }
2111 return nullptr;
2112 }
2113
2114 #ifdef ASSERT
2115 // search through class hierarchy and return true if this class or
2116 // one of the superclasses was redefined
2117 bool InstanceKlass::has_redefined_this_or_super() const {
2118 const Klass* klass = this;
2119 while (klass != nullptr) {
2120 if (InstanceKlass::cast(klass)->has_been_redefined()) {
2121 return true;
2122 }
2123 klass = klass->super();
2124 }
2125 return false;
2126 }
2127 #endif
2484 int method_table_offset_in_words = ioe->offset()/wordSize;
2485 int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2486
2487 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2488 / itableOffsetEntry::size();
2489
2490 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2491 if (ioe->interface_klass() != nullptr) {
2492 it->push(ioe->interface_klass_addr());
2493 itableMethodEntry* ime = ioe->first_method_entry(this);
2494 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2495 for (int index = 0; index < n; index ++) {
2496 it->push(ime[index].method_addr());
2497 }
2498 }
2499 }
2500 }
2501
2502 it->push(&_nest_members);
2503 it->push(&_permitted_subclasses);
2504 it->push(&_record_components);
2505 }
2506
2507 #if INCLUDE_CDS
2508 void InstanceKlass::remove_unshareable_info() {
2509
2510 if (is_linked()) {
2511 assert(can_be_verified_at_dumptime(), "must be");
2512 // Remember this so we can avoid walking the hierarchy at runtime.
2513 set_verified_at_dump_time();
2514 }
2515
2516 Klass::remove_unshareable_info();
2517
2518 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2519 // Classes are attempted to link during dumping and may fail,
2520 // but these classes are still in the dictionary and class list in CLD.
2521 // If the class has failed verification, there is nothing else to remove.
2522 return;
2523 }
2524
2530
2531 { // Otherwise this needs to take out the Compile_lock.
2532 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2533 init_implementor();
2534 }
2535
2536 // Call remove_unshareable_info() on other objects that belong to this class, except
2537 // for constants()->remove_unshareable_info(), which is called in a separate pass in
2538 // ArchiveBuilder::make_klasses_shareable(),
2539
2540 for (int i = 0; i < methods()->length(); i++) {
2541 Method* m = methods()->at(i);
2542 m->remove_unshareable_info();
2543 }
2544
2545 // do array classes also.
2546 if (array_klasses() != nullptr) {
2547 array_klasses()->remove_unshareable_info();
2548 }
2549
2550 // These are not allocated from metaspace. They are safe to set to null.
2551 _source_debug_extension = nullptr;
2552 _dep_context = nullptr;
2553 _osr_nmethods_head = nullptr;
2554 #if INCLUDE_JVMTI
2555 _breakpoints = nullptr;
2556 _previous_versions = nullptr;
2557 _cached_class_file = nullptr;
2558 _jvmti_cached_class_field_map = nullptr;
2559 #endif
2560
2561 _init_thread = nullptr;
2562 _methods_jmethod_ids = nullptr;
2563 _jni_ids = nullptr;
2564 _oop_map_cache = nullptr;
2565 // clear _nest_host to ensure re-load at runtime
2566 _nest_host = nullptr;
2567 init_shared_package_entry();
2568 _dep_context_last_cleaned = 0;
2569
2570 remove_unshareable_flags();
2614 void InstanceKlass::compute_has_loops_flag_for_methods() {
2615 Array<Method*>* methods = this->methods();
2616 for (int index = 0; index < methods->length(); ++index) {
2617 Method* m = methods->at(index);
2618 if (!m->is_overpass()) { // work around JDK-8305771
2619 m->compute_has_loops_flag();
2620 }
2621 }
2622 }
2623
2624 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2625 PackageEntry* pkg_entry, TRAPS) {
2626 // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
2627 // before the InstanceKlass is added to the SystemDictionary. Make
2628 // sure the current state is <loaded.
2629 assert(!is_loaded(), "invalid init state");
2630 assert(!shared_loading_failed(), "Must not try to load failed class again");
2631 set_package(loader_data, pkg_entry, CHECK);
2632 Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2633
2634 Array<Method*>* methods = this->methods();
2635 int num_methods = methods->length();
2636 for (int index = 0; index < num_methods; ++index) {
2637 methods->at(index)->restore_unshareable_info(CHECK);
2638 }
2639 #if INCLUDE_JVMTI
2640 if (JvmtiExport::has_redefined_a_class()) {
2641 // Reinitialize vtable because RedefineClasses may have changed some
2642 // entries in this vtable for super classes so the CDS vtable might
2643 // point to old or obsolete entries. RedefineClasses doesn't fix up
2644 // vtables in the shared system dictionary, only the main one.
2645 // It also redefines the itable too so fix that too.
2646 // First fix any default methods that point to a super class that may
2647 // have been redefined.
2648 bool trace_name_printed = false;
2649 adjust_default_methods(&trace_name_printed);
2650 vtable().initialize_vtable();
2651 itable().initialize_itable();
2652 }
2653 #endif
2654
2655 // restore constant pool resolved references
2656 constants()->restore_unshareable_info(CHECK);
2657
2658 if (array_klasses() != nullptr) {
2659 // To get a consistent list of classes we need MultiArray_lock to ensure
2660 // array classes aren't observed while they are being restored.
2661 RecursiveLocker rl(MultiArray_lock, THREAD);
2662 assert(this == array_klasses()->bottom_klass(), "sanity");
2663 // Array classes have null protection domain.
2664 // --> see ArrayKlass::complete_create_array_klass()
2665 array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
2666 }
2667
2668 // Initialize @ValueBased class annotation if not already set in the archived klass.
2669 if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation() && !is_value_based()) {
2670 set_is_value_based();
2671 }
2672 }
2673
2674 // Check if a class or any of its supertypes has a version older than 50.
2675 // CDS will not perform verification of old classes during dump time because
2676 // without changing the old verifier, the verification constraint cannot be
2677 // retrieved during dump time.
2678 // Verification of archived old classes will be performed during run time.
2679 bool InstanceKlass::can_be_verified_at_dumptime() const {
2680 if (MetaspaceShared::is_in_shared_metaspace(this)) {
2681 // This is a class that was dumped into the base archive, so we know
2682 // it was verified at dump time.
2842 } else {
2843 // Adding one to the attribute length in order to store a null terminator
2844 // character could cause an overflow because the attribute length is
2845 // already coded with an u4 in the classfile, but in practice, it's
2846 // unlikely to happen.
2847 assert((length+1) > length, "Overflow checking");
2848 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
2849 for (int i = 0; i < length; i++) {
2850 sde[i] = array[i];
2851 }
2852 sde[length] = '\0';
2853 _source_debug_extension = sde;
2854 }
2855 }
2856
2857 Symbol* InstanceKlass::generic_signature() const { return _constants->generic_signature(); }
2858 u2 InstanceKlass::generic_signature_index() const { return _constants->generic_signature_index(); }
2859 void InstanceKlass::set_generic_signature_index(u2 sig_index) { _constants->set_generic_signature_index(sig_index); }
2860
2861 const char* InstanceKlass::signature_name() const {
2862
2863 // Get the internal name as a c string
2864 const char* src = (const char*) (name()->as_C_string());
2865 const int src_length = (int)strlen(src);
2866
2867 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
2868
2869 // Add L as type indicator
2870 int dest_index = 0;
2871 dest[dest_index++] = JVM_SIGNATURE_CLASS;
2872
2873 // Add the actual class name
2874 for (int src_index = 0; src_index < src_length; ) {
2875 dest[dest_index++] = src[src_index++];
2876 }
2877
2878 if (is_hidden()) { // Replace the last '+' with a '.'.
2879 for (int index = (int)src_length; index > 0; index--) {
2880 if (dest[index] == '+') {
2881 dest[index] = JVM_SIGNATURE_DOT;
2882 break;
2883 }
2884 }
2885 }
2886
2887 // Add the semicolon and the null
2888 dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
2889 dest[dest_index] = '\0';
2890 return dest;
2891 }
3193 jint InstanceKlass::compute_modifier_flags() const {
3194 jint access = access_flags().as_int();
3195
3196 // But check if it happens to be member class.
3197 InnerClassesIterator iter(this);
3198 for (; !iter.done(); iter.next()) {
3199 int ioff = iter.inner_class_info_index();
3200 // Inner class attribute can be zero, skip it.
3201 // Strange but true: JVM spec. allows null inner class refs.
3202 if (ioff == 0) continue;
3203
3204 // only look at classes that are already loaded
3205 // since we are looking for the flags for our self.
3206 Symbol* inner_name = constants()->klass_name_at(ioff);
3207 if (name() == inner_name) {
3208 // This is really a member class.
3209 access = iter.inner_access_flags();
3210 break;
3211 }
3212 }
3213 // Remember to strip ACC_SUPER bit
3214 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS;
3215 }
3216
3217 jint InstanceKlass::jvmti_class_status() const {
3218 jint result = 0;
3219
3220 if (is_linked()) {
3221 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3222 }
3223
3224 if (is_initialized()) {
3225 assert(is_linked(), "Class status is not consistent");
3226 result |= JVMTI_CLASS_STATUS_INITIALIZED;
3227 }
3228 if (is_in_error_state()) {
3229 result |= JVMTI_CLASS_STATUS_ERROR;
3230 }
3231 return result;
3232 }
3233
3234 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {
3448 }
3449 osr = osr->osr_link();
3450 }
3451
3452 assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3453 if (best != nullptr && best->comp_level() >= comp_level) {
3454 return best;
3455 }
3456 return nullptr;
3457 }
3458
3459 // -----------------------------------------------------------------------------------------------------
3460 // Printing
3461
3462 #define BULLET " - "
3463
3464 static const char* state_names[] = {
3465 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
3466 };
3467
3468 static void print_vtable(intptr_t* start, int len, outputStream* st) {
3469 for (int i = 0; i < len; i++) {
3470 intptr_t e = start[i];
3471 st->print("%d : " INTPTR_FORMAT, i, e);
3472 if (MetaspaceObj::is_valid((Metadata*)e)) {
3473 st->print(" ");
3474 ((Metadata*)e)->print_value_on(st);
3475 }
3476 st->cr();
3477 }
3478 }
3479
3480 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3481 return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);
3482 }
3483
3484 const char* InstanceKlass::init_state_name() const {
3485 return state_names[init_state()];
3486 }
3487
3488 void InstanceKlass::print_on(outputStream* st) const {
3489 assert(is_klass(), "must be klass");
3490 Klass::print_on(st);
3491
3492 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3493 st->print(BULLET"klass size: %d", size()); st->cr();
3494 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3495 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3496 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3497 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3498 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3499 st->print(BULLET"sub: ");
3500 Klass* sub = subklass();
3501 int n;
3502 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3503 if (n < MaxSubklassPrintSize) {
3504 sub->print_value_on(st);
3505 st->print(" ");
3506 }
3507 }
3508 if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3509 st->cr();
3510
3511 if (is_interface()) {
3512 st->print_cr(BULLET"nof implementors: %d", nof_implementors());
3513 if (nof_implementors() == 1) {
3514 st->print_cr(BULLET"implementor: ");
3515 st->print(" ");
3516 implementor()->print_value_on(st);
3517 st->cr();
3518 }
3519 }
3520
3521 st->print(BULLET"arrays: "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3522 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr();
3523 if (Verbose || WizardMode) {
3524 Array<Method*>* method_array = methods();
3525 for (int i = 0; i < method_array->length(); i++) {
3526 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3527 }
3528 }
3529 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr();
3530 if (default_methods() != nullptr) {
3531 st->print(BULLET"default_methods: "); default_methods()->print_value_on(st); st->cr();
3532 if (Verbose) {
3533 Array<Method*>* method_array = default_methods();
3534 for (int i = 0; i < method_array->length(); i++) {
3535 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3536 }
3537 }
3538 }
3539 print_on_maybe_null(st, BULLET"default vtable indices: ", default_vtable_indices());
3540 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr();
3541 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3542
3543 st->print(BULLET"secondary supers: "); secondary_supers()->print_value_on(st); st->cr();
3544 if (UseSecondarySupersTable) {
3545 st->print(BULLET"hash_slot: %d", hash_slot()); st->cr();
3546 st->print(BULLET"bitmap: " UINTX_FORMAT_X_0, _bitmap); st->cr();
3547 }
3548 if (secondary_supers() != nullptr) {
3549 if (Verbose) {
3550 bool is_hashed = UseSecondarySupersTable && (_bitmap != SECONDARY_SUPERS_BITMAP_FULL);
3551 st->print_cr(BULLET"---- secondary supers (%d words):", _secondary_supers->length());
3552 for (int i = 0; i < _secondary_supers->length(); i++) {
3553 ResourceMark rm; // for external_name()
3554 Klass* secondary_super = _secondary_supers->at(i);
3555 st->print(BULLET"%2d:", i);
3556 if (is_hashed) {
3557 int home_slot = compute_home_slot(secondary_super, _bitmap);
3577 print_on_maybe_null(st, BULLET"field type annotations: ", fields_type_annotations());
3578 {
3579 bool have_pv = false;
3580 // previous versions are linked together through the InstanceKlass
3581 for (InstanceKlass* pv_node = previous_versions();
3582 pv_node != nullptr;
3583 pv_node = pv_node->previous_versions()) {
3584 if (!have_pv)
3585 st->print(BULLET"previous version: ");
3586 have_pv = true;
3587 pv_node->constants()->print_value_on(st);
3588 }
3589 if (have_pv) st->cr();
3590 }
3591
3592 print_on_maybe_null(st, BULLET"generic signature: ", generic_signature());
3593 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr();
3594 st->print(BULLET"nest members: "); nest_members()->print_value_on(st); st->cr();
3595 print_on_maybe_null(st, BULLET"record components: ", record_components());
3596 st->print(BULLET"permitted subclasses: "); permitted_subclasses()->print_value_on(st); st->cr();
3597 if (java_mirror() != nullptr) {
3598 st->print(BULLET"java mirror: ");
3599 java_mirror()->print_value_on(st);
3600 st->cr();
3601 } else {
3602 st->print_cr(BULLET"java mirror: null");
3603 }
3604 st->print(BULLET"vtable length %d (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3605 if (vtable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_vtable(), vtable_length(), st);
3606 st->print(BULLET"itable length %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3607 if (itable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_itable(), itable_length(), st);
3608 st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3609
3610 FieldPrinter print_static_field(st);
3611 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3612 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3613 FieldPrinter print_nonstatic_field(st);
3614 InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3615 ik->print_nonstatic_fields(&print_nonstatic_field);
3616
3617 st->print(BULLET"non-static oop maps: ");
3618 OopMapBlock* map = start_of_nonstatic_oop_maps();
3619 OopMapBlock* end_map = map + nonstatic_oop_map_count();
3620 while (map < end_map) {
3621 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3622 map++;
3623 }
3624 st->cr();
3625 }
3626
3627 void InstanceKlass::print_value_on(outputStream* st) const {
|
55 #include "logging/logStream.hpp"
56 #include "memory/allocation.inline.hpp"
57 #include "memory/iterator.inline.hpp"
58 #include "memory/metadataFactory.hpp"
59 #include "memory/metaspaceClosure.hpp"
60 #include "memory/oopFactory.hpp"
61 #include "memory/resourceArea.hpp"
62 #include "memory/universe.hpp"
63 #include "oops/fieldStreams.inline.hpp"
64 #include "oops/constantPool.hpp"
65 #include "oops/instanceClassLoaderKlass.hpp"
66 #include "oops/instanceKlass.inline.hpp"
67 #include "oops/instanceMirrorKlass.hpp"
68 #include "oops/instanceOop.hpp"
69 #include "oops/instanceStackChunkKlass.hpp"
70 #include "oops/klass.inline.hpp"
71 #include "oops/method.hpp"
72 #include "oops/oop.inline.hpp"
73 #include "oops/recordComponent.hpp"
74 #include "oops/symbol.hpp"
75 #include "oops/inlineKlass.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/deoptimization.hpp"
82 #include "runtime/atomic.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"
95 #include "services/threadService.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 void InlineLayoutInfo::metaspace_pointers_do(MetaspaceClosure* it) {
153 log_trace(cds)("Iter(InlineFieldInfo): %p", this);
154 it->push(&_klass);
155 }
156
157 bool InstanceKlass::_finalization_enabled = true;
158
159 static inline bool is_class_loader(const Symbol* class_name,
160 const ClassFileParser& parser) {
161 assert(class_name != nullptr, "invariant");
162
163 if (class_name == vmSymbols::java_lang_ClassLoader()) {
164 return true;
165 }
166
167 if (vmClasses::ClassLoader_klass_loaded()) {
168 const Klass* const super_klass = parser.super_klass();
169 if (super_klass != nullptr) {
170 if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
171 return true;
172 }
173 }
174 }
175 return false;
176 }
177
178 bool InstanceKlass::field_is_null_free_inline_type(int index) const {
179 return field(index).field_flags().is_null_free_inline_type();
180 }
181
182 bool InstanceKlass::is_class_in_loadable_descriptors_attribute(Symbol* name) const {
183 if (_loadable_descriptors == nullptr) return false;
184 for (int i = 0; i < _loadable_descriptors->length(); i++) {
185 Symbol* class_name = _constants->symbol_at(_loadable_descriptors->at(i));
186 if (class_name == name) return true;
187 }
188 return false;
189 }
190
191 static inline bool is_stack_chunk_class(const Symbol* class_name,
192 const ClassLoaderData* loader_data) {
193 return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
194 loader_data->is_the_null_class_loader_data());
195 }
196
197 // private: called to verify that k is a static member of this nest.
198 // We know that k is an instance class in the same package and hence the
199 // same classloader.
200 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
201 assert(!is_hidden(), "unexpected hidden class");
202 if (_nest_members == nullptr || _nest_members == Universe::the_empty_short_array()) {
203 if (log_is_enabled(Trace, class, nestmates)) {
204 ResourceMark rm(current);
205 log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
206 k->external_name(), this->external_name());
207 }
208 return false;
209 }
210
448 }
449
450 const char* InstanceKlass::nest_host_error() {
451 if (_nest_host_index == 0) {
452 return nullptr;
453 } else {
454 constantPoolHandle cph(Thread::current(), constants());
455 return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
456 }
457 }
458
459 void* InstanceKlass::operator new(size_t size, ClassLoaderData* loader_data, size_t word_size,
460 bool use_class_space, TRAPS) throw() {
461 return Metaspace::allocate(loader_data, word_size, ClassType, use_class_space, THREAD);
462 }
463
464 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
465 const int size = InstanceKlass::size(parser.vtable_size(),
466 parser.itable_size(),
467 nonstatic_oop_map_size(parser.total_oop_map_count()),
468 parser.is_interface(),
469 parser.is_inline_type());
470
471 const Symbol* const class_name = parser.class_name();
472 assert(class_name != nullptr, "invariant");
473 ClassLoaderData* loader_data = parser.loader_data();
474 assert(loader_data != nullptr, "invariant");
475
476 InstanceKlass* ik;
477 const bool use_class_space = !parser.is_interface() && !parser.is_abstract();
478
479 // Allocation
480 if (parser.is_instance_ref_klass()) {
481 // java.lang.ref.Reference
482 ik = new (loader_data, size, use_class_space, THREAD) InstanceRefKlass(parser);
483 } else if (class_name == vmSymbols::java_lang_Class()) {
484 // mirror - java.lang.Class
485 ik = new (loader_data, size, use_class_space, THREAD) InstanceMirrorKlass(parser);
486 } else if (is_stack_chunk_class(class_name, loader_data)) {
487 // stack chunk
488 ik = new (loader_data, size, use_class_space, THREAD) InstanceStackChunkKlass(parser);
489 } else if (is_class_loader(class_name, parser)) {
490 // class loader - java.lang.ClassLoader
491 ik = new (loader_data, size, use_class_space, THREAD) InstanceClassLoaderKlass(parser);
492 } else if (parser.is_inline_type()) {
493 // inline type
494 ik = new (loader_data, size, use_class_space, THREAD) InlineKlass(parser);
495 } else {
496 // normal
497 ik = new (loader_data, size, use_class_space, THREAD) InstanceKlass(parser);
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 #ifdef ASSERT
507 ik->bounds_check((address) ik->start_of_vtable(), false, size);
508 ik->bounds_check((address) ik->start_of_itable(), false, size);
509 ik->bounds_check((address) ik->end_of_itable(), true, size);
510 ik->bounds_check((address) ik->end_of_nonstatic_oop_maps(), true, size);
511 #endif //ASSERT
512 return ik;
513 }
514
515 #ifndef PRODUCT
516 bool InstanceKlass::bounds_check(address addr, bool edge_ok, intptr_t size_in_bytes) const {
517 const char* bad = nullptr;
518 address end = nullptr;
519 if (addr < (address)this) {
520 bad = "before";
521 } else if (addr == (address)this) {
522 if (edge_ok) return true;
523 bad = "just before";
524 } else if (addr == (end = (address)this + sizeof(intptr_t) * (size_in_bytes < 0 ? size() : size_in_bytes))) {
525 if (edge_ok) return true;
526 bad = "just after";
527 } else if (addr > end) {
528 bad = "after";
529 } else {
530 return true;
531 }
532 tty->print_cr("%s object bounds: " INTPTR_FORMAT " [" INTPTR_FORMAT ".." INTPTR_FORMAT "]",
533 bad, (intptr_t)addr, (intptr_t)this, (intptr_t)end);
534 Verbose = WizardMode = true; this->print(); //@@
535 return false;
536 }
537 #endif //PRODUCT
538
539 // copy method ordering from resource area to Metaspace
540 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
541 if (m != nullptr) {
542 // allocate a new array and copy contents (memcpy?)
543 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
544 for (int i = 0; i < m->length(); i++) {
545 _method_ordering->at_put(i, m->at(i));
546 }
547 } else {
548 _method_ordering = Universe::the_empty_int_array();
549 }
550 }
551
552 // create a new array of vtable_indices for default methods
553 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
554 Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
555 assert(default_vtable_indices() == nullptr, "only create once");
556 set_default_vtable_indices(vtable_indices);
557 return vtable_indices;
558 }
559
560
561 InstanceKlass::InstanceKlass() {
562 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
563 }
564
565 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
566 Klass(kind),
567 _nest_members(nullptr),
568 _nest_host(nullptr),
569 _permitted_subclasses(nullptr),
570 _record_components(nullptr),
571 _static_field_size(parser.static_field_size()),
572 _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
573 _itable_len(parser.itable_size()),
574 _nest_host_index(0),
575 _init_state(allocated),
576 _reference_type(reference_type),
577 _init_thread(nullptr),
578 _inline_layout_info_array(nullptr),
579 _loadable_descriptors(nullptr),
580 _adr_inlineklass_fixed_block(nullptr)
581 {
582 set_vtable_length(parser.vtable_size());
583 set_access_flags(parser.access_flags());
584 if (parser.is_hidden()) set_is_hidden();
585 set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
586 false));
587 if (parser.has_inline_fields()) {
588 set_has_inline_type_fields();
589 }
590
591 assert(nullptr == _methods, "underlying memory not zeroed?");
592 assert(is_instance_klass(), "is layout incorrect?");
593 assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
594 }
595
596 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
597 Array<Method*>* methods) {
598 if (methods != nullptr && methods != Universe::the_empty_method_array() &&
599 !methods->is_shared()) {
600 for (int i = 0; i < methods->length(); i++) {
601 Method* method = methods->at(i);
602 if (method == nullptr) continue; // maybe null if error processing
603 // Only want to delete methods that are not executing for RedefineClasses.
604 // The previous version will point to them so they're not totally dangling
605 assert (!method->on_stack(), "shouldn't be called with methods on stack");
606 MetadataFactory::free_metadata(loader_data, method);
607 }
608 MetadataFactory::free_array<Method*>(loader_data, methods);
609 }
709 (address)(secondary_supers()) != (address)(transitive_interfaces()) &&
710 !secondary_supers()->is_shared()) {
711 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers());
712 }
713 set_secondary_supers(nullptr);
714
715 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
716 set_transitive_interfaces(nullptr);
717 set_local_interfaces(nullptr);
718
719 if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
720 MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
721 }
722 set_fieldinfo_stream(nullptr);
723
724 if (fields_status() != nullptr && !fields_status()->is_shared()) {
725 MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
726 }
727 set_fields_status(nullptr);
728
729 if (inline_layout_info_array() != nullptr) {
730 MetadataFactory::free_array<InlineLayoutInfo>(loader_data, inline_layout_info_array());
731 }
732 set_inline_layout_info_array(nullptr);
733
734 // If a method from a redefined class is using this constant pool, don't
735 // delete it, yet. The new class's previous version will point to this.
736 if (constants() != nullptr) {
737 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
738 if (!constants()->is_shared()) {
739 MetadataFactory::free_metadata(loader_data, constants());
740 }
741 // Delete any cached resolution errors for the constant pool
742 SystemDictionary::delete_resolution_error(constants());
743
744 set_constants(nullptr);
745 }
746
747 if (inner_classes() != nullptr &&
748 inner_classes() != Universe::the_empty_short_array() &&
749 !inner_classes()->is_shared()) {
750 MetadataFactory::free_array<jushort>(loader_data, inner_classes());
751 }
752 set_inner_classes(nullptr);
753
754 if (nest_members() != nullptr &&
755 nest_members() != Universe::the_empty_short_array() &&
756 !nest_members()->is_shared()) {
757 MetadataFactory::free_array<jushort>(loader_data, nest_members());
758 }
759 set_nest_members(nullptr);
760
761 if (permitted_subclasses() != nullptr &&
762 permitted_subclasses() != Universe::the_empty_short_array() &&
763 !permitted_subclasses()->is_shared()) {
764 MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
765 }
766 set_permitted_subclasses(nullptr);
767
768 if (loadable_descriptors() != nullptr &&
769 loadable_descriptors() != Universe::the_empty_short_array() &&
770 !loadable_descriptors()->is_shared()) {
771 MetadataFactory::free_array<jushort>(loader_data, loadable_descriptors());
772 }
773 set_loadable_descriptors(nullptr);
774
775 // We should deallocate the Annotations instance if it's not in shared spaces.
776 if (annotations() != nullptr && !annotations()->is_shared()) {
777 MetadataFactory::free_metadata(loader_data, annotations());
778 }
779 set_annotations(nullptr);
780
781 SystemDictionaryShared::handle_class_unloading(this);
782
783 #if INCLUDE_CDS_JAVA_HEAP
784 if (CDSConfig::is_dumping_heap()) {
785 HeapShared::remove_scratch_objects(this);
786 }
787 #endif
788 }
789
790 bool InstanceKlass::is_record() const {
791 return _record_components != nullptr &&
792 is_final() &&
793 java_super() == vmClasses::Record_klass();
794 }
913 vmSymbols::java_lang_IncompatibleClassChangeError(),
914 "class %s has interface %s as super class",
915 external_name(),
916 super_klass->external_name()
917 );
918 return false;
919 }
920
921 InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
922 ik_super->link_class_impl(CHECK_false);
923 }
924
925 // link all interfaces implemented by this class before linking this class
926 Array<InstanceKlass*>* interfaces = local_interfaces();
927 int num_interfaces = interfaces->length();
928 for (int index = 0; index < num_interfaces; index++) {
929 InstanceKlass* interk = interfaces->at(index);
930 interk->link_class_impl(CHECK_false);
931 }
932
933
934 // If a class declares a method that uses an inline class as an argument
935 // type or return inline type, this inline class must be loaded during the
936 // linking of this class because size and properties of the inline class
937 // must be known in order to be able to perform inline type optimizations.
938 // The implementation below is an approximation of this rule, the code
939 // iterates over all methods of the current class (including overridden
940 // methods), not only the methods declared by this class. This
941 // approximation makes the code simpler, and doesn't change the semantic
942 // because classes declaring methods overridden by the current class are
943 // linked (and have performed their own pre-loading) before the linking
944 // of the current class.
945
946
947 // Note:
948 // Inline class types are loaded during
949 // the loading phase (see ClassFileParser::post_process_parsed_stream()).
950 // Inline class types used as element types for array creation
951 // are not pre-loaded. Their loading is triggered by either anewarray
952 // or multianewarray bytecodes.
953
954 // Could it be possible to do the following processing only if the
955 // class uses inline types?
956 if (EnableValhalla) {
957 ResourceMark rm(THREAD);
958 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
959 if (fs.is_null_free_inline_type() && fs.access_flags().is_static()) {
960 Symbol* sig = fs.signature();
961 TempNewSymbol s = Signature::strip_envelope(sig);
962 if (s != name()) {
963 log_info(class, preload)("Preloading class %s during linking of class %s. Cause: a null-free static field is declared with this type", s->as_C_string(), name()->as_C_string());
964 Klass* klass = SystemDictionary::resolve_or_fail(s,
965 Handle(THREAD, class_loader()), Handle(THREAD, protection_domain()), true,
966 CHECK_false);
967 if (HAS_PENDING_EXCEPTION) {
968 log_warning(class, preload)("Preloading of class %s during linking of class %s (cause: null-free static field) failed: %s",
969 s->as_C_string(), name()->as_C_string(), PENDING_EXCEPTION->klass()->name()->as_C_string());
970 return false; // Exception is still pending
971 }
972 log_info(class, preload)("Preloading of class %s during linking of class %s (cause: null-free static field) succeeded",
973 s->as_C_string(), name()->as_C_string());
974 assert(klass != nullptr, "Sanity check");
975 if (klass->is_abstract()) {
976 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
977 err_msg("Class %s expects class %s to be concrete value class, but it is an abstract class",
978 name()->as_C_string(),
979 InstanceKlass::cast(klass)->external_name()), false);
980 }
981 if (!klass->is_inline_klass()) {
982 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
983 err_msg("class %s expects class %s to be a value class but it is an identity class",
984 name()->as_C_string(), klass->external_name()), false);
985 }
986 InlineKlass* vk = InlineKlass::cast(klass);
987 if (!vk->is_implicitly_constructible()) {
988 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
989 err_msg("class %s is not implicitly constructible and it is used in a null restricted static field (not supported)",
990 klass->external_name()), false);
991 }
992 // the inline_type_field_klasses_array might have been loaded with CDS, so update only if not already set and check consistency
993 InlineLayoutInfo* li = inline_layout_info_adr(fs.index());
994 if (li->klass() == nullptr) {
995 li->set_klass(InlineKlass::cast(vk));
996 li->set_kind(LayoutKind::REFERENCE);
997 }
998 assert(get_inline_type_field_klass(fs.index()) == vk, "Must match");
999 } else {
1000 InlineLayoutInfo* li = inline_layout_info_adr(fs.index());
1001 if (li->klass() == nullptr) {
1002 li->set_klass(InlineKlass::cast(this));
1003 li->set_kind(LayoutKind::REFERENCE);
1004 }
1005 assert(get_inline_type_field_klass(fs.index()) == this, "Must match");
1006 }
1007 }
1008 }
1009
1010 // Aggressively preloading all classes from the LoadableDescriptors attribute
1011 if (loadable_descriptors() != nullptr) {
1012 HandleMark hm(THREAD);
1013 for (int i = 0; i < loadable_descriptors()->length(); i++) {
1014 Symbol* sig = constants()->symbol_at(loadable_descriptors()->at(i));
1015 if (!Signature::has_envelope(sig)) continue;
1016 TempNewSymbol class_name = Signature::strip_envelope(sig);
1017 if (class_name == name()) continue;
1018 log_info(class, preload)("Preloading class %s during linking of class %s because of the class is listed in the LoadableDescriptors attribute", sig->as_C_string(), name()->as_C_string());
1019 oop loader = class_loader();
1020 oop protection_domain = this->protection_domain();
1021 Klass* klass = SystemDictionary::resolve_or_null(class_name,
1022 Handle(THREAD, loader), Handle(THREAD, protection_domain), THREAD);
1023 if (HAS_PENDING_EXCEPTION) {
1024 CLEAR_PENDING_EXCEPTION;
1025 }
1026 if (klass != nullptr) {
1027 log_info(class, preload)("Preloading of class %s during linking of class %s (cause: LoadableDescriptors attribute) succeeded", class_name->as_C_string(), name()->as_C_string());
1028 if (!klass->is_inline_klass()) {
1029 // Non value class are allowed by the current spec, but it could be an indication of an issue so let's log a warning
1030 log_warning(class, preload)("Preloading class %s during linking of class %s (cause: LoadableDescriptors attribute) but loaded class is not a value class", class_name->as_C_string(), name()->as_C_string());
1031 }
1032 } else {
1033 log_warning(class, preload)("Preloading of class %s during linking of class %s (cause: LoadableDescriptors attribute) failed", class_name->as_C_string(), name()->as_C_string());
1034 }
1035 }
1036 }
1037 }
1038
1039 // in case the class is linked in the process of linking its superclasses
1040 if (is_linked()) {
1041 return true;
1042 }
1043
1044 // trace only the link time for this klass that includes
1045 // the verification time
1046 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
1047 ClassLoader::perf_class_link_selftime(),
1048 ClassLoader::perf_classes_linked(),
1049 jt->get_thread_stat()->perf_recursion_counts_addr(),
1050 jt->get_thread_stat()->perf_timers_addr(),
1051 PerfClassTraceTime::CLASS_LINK);
1052
1053 // verification & rewriting
1054 {
1055 HandleMark hm(THREAD);
1056 Handle h_init_lock(THREAD, init_lock());
1057 ObjectLocker ol(h_init_lock, jt);
1058 // rewritten will have been set if loader constraint error found
1323 ss.print("Could not initialize class %s", external_name());
1324 if (cause.is_null()) {
1325 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1326 } else {
1327 THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1328 ss.as_string(), cause);
1329 }
1330 } else {
1331
1332 // Step 6
1333 set_init_state(being_initialized);
1334 set_init_thread(jt);
1335 if (debug_logging_enabled) {
1336 ResourceMark rm(jt);
1337 log_debug(class, init)("Thread \"%s\" is initializing %s",
1338 jt->name(), external_name());
1339 }
1340 }
1341 }
1342
1343 // Pre-allocating an instance of the default value
1344 if (is_inline_klass()) {
1345 InlineKlass* vk = InlineKlass::cast(this);
1346 oop val = vk->allocate_instance(THREAD);
1347 if (HAS_PENDING_EXCEPTION) {
1348 Handle e(THREAD, PENDING_EXCEPTION);
1349 CLEAR_PENDING_EXCEPTION;
1350 {
1351 EXCEPTION_MARK;
1352 add_initialization_error(THREAD, e);
1353 // Locks object, set state, and notify all waiting threads
1354 set_initialization_state_and_notify(initialization_error, THREAD);
1355 CLEAR_PENDING_EXCEPTION;
1356 }
1357 THROW_OOP(e());
1358 }
1359 vk->set_default_value(val);
1360 if (vk->has_nullable_layout()) {
1361 val = vk->allocate_instance(THREAD);
1362 if (HAS_PENDING_EXCEPTION) {
1363 Handle e(THREAD, PENDING_EXCEPTION);
1364 CLEAR_PENDING_EXCEPTION;
1365 {
1366 EXCEPTION_MARK;
1367 add_initialization_error(THREAD, e);
1368 // Locks object, set state, and notify all waiting threads
1369 set_initialization_state_and_notify(initialization_error, THREAD);
1370 CLEAR_PENDING_EXCEPTION;
1371 }
1372 THROW_OOP(e());
1373 }
1374 vk->set_null_reset_value(val);
1375 }
1376 }
1377
1378 // Step 7
1379 // Next, if C is a class rather than an interface, initialize it's super class and super
1380 // interfaces.
1381 if (!is_interface()) {
1382 Klass* super_klass = super();
1383 if (super_klass != nullptr && super_klass->should_be_initialized()) {
1384 super_klass->initialize(THREAD);
1385 }
1386 // If C implements any interface that declares a non-static, concrete method,
1387 // the initialization of C triggers initialization of its super interfaces.
1388 // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1389 // having a superinterface that declares, non-static, concrete methods
1390 if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1391 initialize_super_interfaces(THREAD);
1392 }
1393
1394 // If any exceptions, complete abruptly, throwing the same exception as above.
1395 if (HAS_PENDING_EXCEPTION) {
1396 Handle e(THREAD, PENDING_EXCEPTION);
1397 CLEAR_PENDING_EXCEPTION;
1398 {
1399 EXCEPTION_MARK;
1400 add_initialization_error(THREAD, e);
1401 // Locks object, set state, and notify all waiting threads
1402 set_initialization_state_and_notify(initialization_error, THREAD);
1403 CLEAR_PENDING_EXCEPTION;
1404 }
1405 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1406 THROW_OOP(e());
1407 }
1408 }
1409
1410 // Step 8
1411 // Initialize classes of inline fields
1412 if (EnableValhalla) {
1413 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1414 if (fs.is_null_free_inline_type()) {
1415
1416 // inline type field klass array entries must have alreadyt been filed at load time or link time
1417 Klass* klass = get_inline_type_field_klass(fs.index());
1418
1419 InstanceKlass::cast(klass)->initialize(THREAD);
1420 if (fs.access_flags().is_static()) {
1421 if (java_mirror()->obj_field(fs.offset()) == nullptr) {
1422 java_mirror()->obj_field_put(fs.offset(), InlineKlass::cast(klass)->default_value());
1423 }
1424 }
1425
1426 if (HAS_PENDING_EXCEPTION) {
1427 Handle e(THREAD, PENDING_EXCEPTION);
1428 CLEAR_PENDING_EXCEPTION;
1429 {
1430 EXCEPTION_MARK;
1431 add_initialization_error(THREAD, e);
1432 // Locks object, set state, and notify all waiting threads
1433 set_initialization_state_and_notify(initialization_error, THREAD);
1434 CLEAR_PENDING_EXCEPTION;
1435 }
1436 THROW_OOP(e());
1437 }
1438 }
1439 }
1440 }
1441
1442
1443 // Step 9
1444 {
1445 DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1446 if (class_initializer() != nullptr) {
1447 // Timer includes any side effects of class initialization (resolution,
1448 // etc), but not recursive entry into call_class_initializer().
1449 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1450 ClassLoader::perf_class_init_selftime(),
1451 ClassLoader::perf_classes_inited(),
1452 jt->get_thread_stat()->perf_recursion_counts_addr(),
1453 jt->get_thread_stat()->perf_timers_addr(),
1454 PerfClassTraceTime::CLASS_CLINIT);
1455 call_class_initializer(THREAD);
1456 } else {
1457 // The elapsed time is so small it's not worth counting.
1458 if (UsePerfData) {
1459 ClassLoader::perf_classes_inited()->inc();
1460 }
1461 call_class_initializer(THREAD);
1462 }
1463 }
1464
1465 // Step 10
1466 if (!HAS_PENDING_EXCEPTION) {
1467 set_initialization_state_and_notify(fully_initialized, CHECK);
1468 debug_only(vtable().verify(tty, true);)
1469 }
1470 else {
1471 // Step 11 and 12
1472 Handle e(THREAD, PENDING_EXCEPTION);
1473 CLEAR_PENDING_EXCEPTION;
1474 // JVMTI has already reported the pending exception
1475 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1476 JvmtiExport::clear_detected_exception(jt);
1477 {
1478 EXCEPTION_MARK;
1479 add_initialization_error(THREAD, e);
1480 set_initialization_state_and_notify(initialization_error, THREAD);
1481 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
1482 // JVMTI has already reported the pending exception
1483 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1484 JvmtiExport::clear_detected_exception(jt);
1485 }
1486 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1487 if (e->is_a(vmClasses::Error_klass())) {
1488 THROW_OOP(e());
1489 } else {
1490 JavaCallArguments args(e);
1491 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1756 ResourceMark rm(THREAD);
1757 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
1758 : vmSymbols::java_lang_InstantiationException(), external_name());
1759 }
1760 if (this == vmClasses::Class_klass()) {
1761 ResourceMark rm(THREAD);
1762 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1763 : vmSymbols::java_lang_IllegalAccessException(), external_name());
1764 }
1765 }
1766
1767 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1768 // Need load-acquire for lock-free read
1769 if (array_klasses_acquire() == nullptr) {
1770
1771 // Recursively lock array allocation
1772 RecursiveLocker rl(MultiArray_lock, THREAD);
1773
1774 // Check if another thread created the array klass while we were waiting for the lock.
1775 if (array_klasses() == nullptr) {
1776 ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, false, CHECK_NULL);
1777 // use 'release' to pair with lock-free load
1778 release_set_array_klasses(k);
1779 }
1780 }
1781
1782 // array_klasses() will always be set at this point
1783 ArrayKlass* ak = array_klasses();
1784 assert(ak != nullptr, "should be set");
1785 return ak->array_klass(n, THREAD);
1786 }
1787
1788 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1789 // Need load-acquire for lock-free read
1790 ArrayKlass* ak = array_klasses_acquire();
1791 if (ak == nullptr) {
1792 return nullptr;
1793 } else {
1794 return ak->array_klass_or_null(n);
1795 }
1796 }
1797
1798 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1799 return array_klass(1, THREAD);
1800 }
1801
1802 ArrayKlass* InstanceKlass::array_klass_or_null() {
1803 return array_klass_or_null(1);
1804 }
1805
1806 static int call_class_initializer_counter = 0; // for debugging
1807
1808 Method* InstanceKlass::class_initializer() const {
1809 Method* clinit = find_method(
1810 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1811 if (clinit != nullptr && clinit->is_class_initializer()) {
1812 return clinit;
1813 }
1814 return nullptr;
1815 }
1816
1817 void InstanceKlass::call_class_initializer(TRAPS) {
1818 if (ReplayCompiles &&
1819 (ReplaySuppressInitializers == 1 ||
1820 (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1821 // Hide the existence of the initializer for the purpose of replaying the compile
1822 return;
1823 }
1824
1825 #if INCLUDE_CDS
1826 // This is needed to ensure the consistency of the archived heap objects.
1827 if (has_archived_enum_objs()) {
1828 assert(is_shared(), "must be");
1829 bool initialized = CDSEnumKlass::initialize_enum_klass(this, CHECK);
1830 if (initialized) {
1831 return;
1855
1856 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1857 InterpreterOopMap* entry_for) {
1858 // Lazily create the _oop_map_cache at first request.
1859 // Load_acquire is needed to safely get instance published with CAS by another thread.
1860 OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1861 if (oop_map_cache == nullptr) {
1862 // Try to install new instance atomically.
1863 oop_map_cache = new OopMapCache();
1864 OopMapCache* other = Atomic::cmpxchg(&_oop_map_cache, (OopMapCache*)nullptr, oop_map_cache);
1865 if (other != nullptr) {
1866 // Someone else managed to install before us, ditch local copy and use the existing one.
1867 delete oop_map_cache;
1868 oop_map_cache = other;
1869 }
1870 }
1871 // _oop_map_cache is constant after init; lookup below does its own locking.
1872 oop_map_cache->lookup(method, bci, entry_for);
1873 }
1874
1875
1876 FieldInfo InstanceKlass::field(int index) const {
1877 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1878 if (fs.index() == index) {
1879 return fs.to_FieldInfo();
1880 }
1881 }
1882 fatal("Field not found");
1883 return FieldInfo();
1884 }
1885
1886 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1887 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1888 Symbol* f_name = fs.name();
1889 Symbol* f_sig = fs.signature();
1890 if (f_name == name && f_sig == sig) {
1891 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1892 return true;
1893 }
1894 }
1936
1937 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1938 // search order according to newest JVM spec (5.4.3.2, p.167).
1939 // 1) search for field in current klass
1940 if (find_local_field(name, sig, fd)) {
1941 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1942 }
1943 // 2) search for field recursively in direct superinterfaces
1944 if (is_static) {
1945 Klass* intf = find_interface_field(name, sig, fd);
1946 if (intf != nullptr) return intf;
1947 }
1948 // 3) apply field lookup recursively if superclass exists
1949 { Klass* supr = super();
1950 if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1951 }
1952 // 4) otherwise field lookup fails
1953 return nullptr;
1954 }
1955
1956 bool InstanceKlass::contains_field_offset(int offset) {
1957 if (this->is_inline_klass()) {
1958 InlineKlass* vk = InlineKlass::cast(this);
1959 return offset >= vk->first_field_offset() && offset < (vk->first_field_offset() + vk->payload_size_in_bytes());
1960 } else {
1961 fieldDescriptor fd;
1962 return find_field_from_offset(offset, false, &fd);
1963 }
1964 }
1965
1966 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1967 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1968 if (fs.offset() == offset) {
1969 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1970 if (fd->is_static() == is_static) return true;
1971 }
1972 }
1973 return false;
1974 }
1975
1976
1977 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1978 Klass* klass = const_cast<InstanceKlass*>(this);
1979 while (klass != nullptr) {
1980 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1981 return true;
1982 }
1983 klass = klass->super();
1984 }
2336 }
2337
2338 // uncached_lookup_method searches both the local class methods array and all
2339 // superclasses methods arrays, skipping any overpass methods in superclasses,
2340 // and possibly skipping private methods.
2341 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2342 const Symbol* signature,
2343 OverpassLookupMode overpass_mode,
2344 PrivateLookupMode private_mode) const {
2345 OverpassLookupMode overpass_local_mode = overpass_mode;
2346 const Klass* klass = this;
2347 while (klass != nullptr) {
2348 Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2349 signature,
2350 overpass_local_mode,
2351 StaticLookupMode::find,
2352 private_mode);
2353 if (method != nullptr) {
2354 return method;
2355 }
2356 if (name == vmSymbols::object_initializer_name()) {
2357 break; // <init> is never inherited
2358 }
2359 klass = klass->super();
2360 overpass_local_mode = OverpassLookupMode::skip; // Always ignore overpass methods in superclasses
2361 }
2362 return nullptr;
2363 }
2364
2365 #ifdef ASSERT
2366 // search through class hierarchy and return true if this class or
2367 // one of the superclasses was redefined
2368 bool InstanceKlass::has_redefined_this_or_super() const {
2369 const Klass* klass = this;
2370 while (klass != nullptr) {
2371 if (InstanceKlass::cast(klass)->has_been_redefined()) {
2372 return true;
2373 }
2374 klass = klass->super();
2375 }
2376 return false;
2377 }
2378 #endif
2735 int method_table_offset_in_words = ioe->offset()/wordSize;
2736 int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2737
2738 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2739 / itableOffsetEntry::size();
2740
2741 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2742 if (ioe->interface_klass() != nullptr) {
2743 it->push(ioe->interface_klass_addr());
2744 itableMethodEntry* ime = ioe->first_method_entry(this);
2745 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2746 for (int index = 0; index < n; index ++) {
2747 it->push(ime[index].method_addr());
2748 }
2749 }
2750 }
2751 }
2752
2753 it->push(&_nest_members);
2754 it->push(&_permitted_subclasses);
2755 it->push(&_loadable_descriptors);
2756 it->push(&_record_components);
2757 it->push(&_inline_layout_info_array, MetaspaceClosure::_writable);
2758 }
2759
2760 #if INCLUDE_CDS
2761 void InstanceKlass::remove_unshareable_info() {
2762
2763 if (is_linked()) {
2764 assert(can_be_verified_at_dumptime(), "must be");
2765 // Remember this so we can avoid walking the hierarchy at runtime.
2766 set_verified_at_dump_time();
2767 }
2768
2769 Klass::remove_unshareable_info();
2770
2771 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2772 // Classes are attempted to link during dumping and may fail,
2773 // but these classes are still in the dictionary and class list in CLD.
2774 // If the class has failed verification, there is nothing else to remove.
2775 return;
2776 }
2777
2783
2784 { // Otherwise this needs to take out the Compile_lock.
2785 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2786 init_implementor();
2787 }
2788
2789 // Call remove_unshareable_info() on other objects that belong to this class, except
2790 // for constants()->remove_unshareable_info(), which is called in a separate pass in
2791 // ArchiveBuilder::make_klasses_shareable(),
2792
2793 for (int i = 0; i < methods()->length(); i++) {
2794 Method* m = methods()->at(i);
2795 m->remove_unshareable_info();
2796 }
2797
2798 // do array classes also.
2799 if (array_klasses() != nullptr) {
2800 array_klasses()->remove_unshareable_info();
2801 }
2802
2803 // These are not allocated from metaspace. They are safe to set to nullptr.
2804 _source_debug_extension = nullptr;
2805 _dep_context = nullptr;
2806 _osr_nmethods_head = nullptr;
2807 #if INCLUDE_JVMTI
2808 _breakpoints = nullptr;
2809 _previous_versions = nullptr;
2810 _cached_class_file = nullptr;
2811 _jvmti_cached_class_field_map = nullptr;
2812 #endif
2813
2814 _init_thread = nullptr;
2815 _methods_jmethod_ids = nullptr;
2816 _jni_ids = nullptr;
2817 _oop_map_cache = nullptr;
2818 // clear _nest_host to ensure re-load at runtime
2819 _nest_host = nullptr;
2820 init_shared_package_entry();
2821 _dep_context_last_cleaned = 0;
2822
2823 remove_unshareable_flags();
2867 void InstanceKlass::compute_has_loops_flag_for_methods() {
2868 Array<Method*>* methods = this->methods();
2869 for (int index = 0; index < methods->length(); ++index) {
2870 Method* m = methods->at(index);
2871 if (!m->is_overpass()) { // work around JDK-8305771
2872 m->compute_has_loops_flag();
2873 }
2874 }
2875 }
2876
2877 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2878 PackageEntry* pkg_entry, TRAPS) {
2879 // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
2880 // before the InstanceKlass is added to the SystemDictionary. Make
2881 // sure the current state is <loaded.
2882 assert(!is_loaded(), "invalid init state");
2883 assert(!shared_loading_failed(), "Must not try to load failed class again");
2884 set_package(loader_data, pkg_entry, CHECK);
2885 Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2886
2887 if (is_inline_klass()) {
2888 InlineKlass::cast(this)->initialize_calling_convention(CHECK);
2889 }
2890
2891 Array<Method*>* methods = this->methods();
2892 int num_methods = methods->length();
2893 for (int index = 0; index < num_methods; ++index) {
2894 methods->at(index)->restore_unshareable_info(CHECK);
2895 }
2896 #if INCLUDE_JVMTI
2897 if (JvmtiExport::has_redefined_a_class()) {
2898 // Reinitialize vtable because RedefineClasses may have changed some
2899 // entries in this vtable for super classes so the CDS vtable might
2900 // point to old or obsolete entries. RedefineClasses doesn't fix up
2901 // vtables in the shared system dictionary, only the main one.
2902 // It also redefines the itable too so fix that too.
2903 // First fix any default methods that point to a super class that may
2904 // have been redefined.
2905 bool trace_name_printed = false;
2906 adjust_default_methods(&trace_name_printed);
2907 vtable().initialize_vtable();
2908 itable().initialize_itable();
2909 }
2910 #endif
2911
2912 // restore constant pool resolved references
2913 constants()->restore_unshareable_info(CHECK);
2914
2915 if (array_klasses() != nullptr) {
2916 // To get a consistent list of classes we need MultiArray_lock to ensure
2917 // array classes aren't observed while they are being restored.
2918 RecursiveLocker rl(MultiArray_lock, THREAD);
2919 assert(this == ObjArrayKlass::cast(array_klasses())->bottom_klass(), "sanity");
2920 // Array classes have null protection domain.
2921 // --> see ArrayKlass::complete_create_array_klass()
2922 array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
2923 }
2924
2925 // Initialize @ValueBased class annotation if not already set in the archived klass.
2926 if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation() && !is_value_based()) {
2927 set_is_value_based();
2928 }
2929 }
2930
2931 // Check if a class or any of its supertypes has a version older than 50.
2932 // CDS will not perform verification of old classes during dump time because
2933 // without changing the old verifier, the verification constraint cannot be
2934 // retrieved during dump time.
2935 // Verification of archived old classes will be performed during run time.
2936 bool InstanceKlass::can_be_verified_at_dumptime() const {
2937 if (MetaspaceShared::is_in_shared_metaspace(this)) {
2938 // This is a class that was dumped into the base archive, so we know
2939 // it was verified at dump time.
3099 } else {
3100 // Adding one to the attribute length in order to store a null terminator
3101 // character could cause an overflow because the attribute length is
3102 // already coded with an u4 in the classfile, but in practice, it's
3103 // unlikely to happen.
3104 assert((length+1) > length, "Overflow checking");
3105 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
3106 for (int i = 0; i < length; i++) {
3107 sde[i] = array[i];
3108 }
3109 sde[length] = '\0';
3110 _source_debug_extension = sde;
3111 }
3112 }
3113
3114 Symbol* InstanceKlass::generic_signature() const { return _constants->generic_signature(); }
3115 u2 InstanceKlass::generic_signature_index() const { return _constants->generic_signature_index(); }
3116 void InstanceKlass::set_generic_signature_index(u2 sig_index) { _constants->set_generic_signature_index(sig_index); }
3117
3118 const char* InstanceKlass::signature_name() const {
3119 return signature_name_of_carrier(JVM_SIGNATURE_CLASS);
3120 }
3121
3122 const char* InstanceKlass::signature_name_of_carrier(char c) const {
3123 // Get the internal name as a c string
3124 const char* src = (const char*) (name()->as_C_string());
3125 const int src_length = (int)strlen(src);
3126
3127 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
3128
3129 // Add L or Q as type indicator
3130 int dest_index = 0;
3131 dest[dest_index++] = c;
3132
3133 // Add the actual class name
3134 for (int src_index = 0; src_index < src_length; ) {
3135 dest[dest_index++] = src[src_index++];
3136 }
3137
3138 if (is_hidden()) { // Replace the last '+' with a '.'.
3139 for (int index = (int)src_length; index > 0; index--) {
3140 if (dest[index] == '+') {
3141 dest[index] = JVM_SIGNATURE_DOT;
3142 break;
3143 }
3144 }
3145 }
3146
3147 // Add the semicolon and the null
3148 dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
3149 dest[dest_index] = '\0';
3150 return dest;
3151 }
3453 jint InstanceKlass::compute_modifier_flags() const {
3454 jint access = access_flags().as_int();
3455
3456 // But check if it happens to be member class.
3457 InnerClassesIterator iter(this);
3458 for (; !iter.done(); iter.next()) {
3459 int ioff = iter.inner_class_info_index();
3460 // Inner class attribute can be zero, skip it.
3461 // Strange but true: JVM spec. allows null inner class refs.
3462 if (ioff == 0) continue;
3463
3464 // only look at classes that are already loaded
3465 // since we are looking for the flags for our self.
3466 Symbol* inner_name = constants()->klass_name_at(ioff);
3467 if (name() == inner_name) {
3468 // This is really a member class.
3469 access = iter.inner_access_flags();
3470 break;
3471 }
3472 }
3473 return (access & JVM_ACC_WRITTEN_FLAGS);
3474 }
3475
3476 jint InstanceKlass::jvmti_class_status() const {
3477 jint result = 0;
3478
3479 if (is_linked()) {
3480 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3481 }
3482
3483 if (is_initialized()) {
3484 assert(is_linked(), "Class status is not consistent");
3485 result |= JVMTI_CLASS_STATUS_INITIALIZED;
3486 }
3487 if (is_in_error_state()) {
3488 result |= JVMTI_CLASS_STATUS_ERROR;
3489 }
3490 return result;
3491 }
3492
3493 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {
3707 }
3708 osr = osr->osr_link();
3709 }
3710
3711 assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3712 if (best != nullptr && best->comp_level() >= comp_level) {
3713 return best;
3714 }
3715 return nullptr;
3716 }
3717
3718 // -----------------------------------------------------------------------------------------------------
3719 // Printing
3720
3721 #define BULLET " - "
3722
3723 static const char* state_names[] = {
3724 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
3725 };
3726
3727 static void print_vtable(address self, intptr_t* start, int len, outputStream* st) {
3728 ResourceMark rm;
3729 int* forward_refs = NEW_RESOURCE_ARRAY(int, len);
3730 for (int i = 0; i < len; i++) forward_refs[i] = 0;
3731 for (int i = 0; i < len; i++) {
3732 intptr_t e = start[i];
3733 st->print("%d : " INTPTR_FORMAT, i, e);
3734 if (forward_refs[i] != 0) {
3735 int from = forward_refs[i];
3736 int off = (int) start[from];
3737 st->print(" (offset %d <= [%d])", off, from);
3738 }
3739 if (MetaspaceObj::is_valid((Metadata*)e)) {
3740 st->print(" ");
3741 ((Metadata*)e)->print_value_on(st);
3742 } else if (self != nullptr && e > 0 && e < 0x10000) {
3743 address location = self + e;
3744 int index = (int)((intptr_t*)location - start);
3745 st->print(" (offset %d => [%d])", (int)e, index);
3746 if (index >= 0 && index < len)
3747 forward_refs[index] = i;
3748 }
3749 st->cr();
3750 }
3751 }
3752
3753 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3754 return print_vtable(nullptr, reinterpret_cast<intptr_t*>(start), len, st);
3755 }
3756
3757 template<typename T>
3758 static void print_array_on(outputStream* st, Array<T>* array) {
3759 if (array == nullptr) { st->print_cr("nullptr"); return; }
3760 array->print_value_on(st); st->cr();
3761 if (Verbose || WizardMode) {
3762 for (int i = 0; i < array->length(); i++) {
3763 st->print("%d : ", i); array->at(i)->print_value_on(st); st->cr();
3764 }
3765 }
3766 }
3767
3768 static void print_array_on(outputStream* st, Array<int>* array) {
3769 if (array == nullptr) { st->print_cr("nullptr"); return; }
3770 array->print_value_on(st); st->cr();
3771 if (Verbose || WizardMode) {
3772 for (int i = 0; i < array->length(); i++) {
3773 st->print("%d : %d", i, array->at(i)); st->cr();
3774 }
3775 }
3776 }
3777
3778 const char* InstanceKlass::init_state_name() const {
3779 return state_names[init_state()];
3780 }
3781
3782 void InstanceKlass::print_on(outputStream* st) const {
3783 assert(is_klass(), "must be klass");
3784 Klass::print_on(st);
3785
3786 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3787 st->print(BULLET"klass size: %d", size()); st->cr();
3788 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3789 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3790 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3791 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3792 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3793 st->print(BULLET"sub: ");
3794 Klass* sub = subklass();
3795 int n;
3796 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3797 if (n < MaxSubklassPrintSize) {
3798 sub->print_value_on(st);
3799 st->print(" ");
3800 }
3801 }
3802 if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3803 st->cr();
3804
3805 if (is_interface()) {
3806 st->print_cr(BULLET"nof implementors: %d", nof_implementors());
3807 if (nof_implementors() == 1) {
3808 st->print_cr(BULLET"implementor: ");
3809 st->print(" ");
3810 implementor()->print_value_on(st);
3811 st->cr();
3812 }
3813 }
3814
3815 st->print(BULLET"arrays: "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3816 st->print(BULLET"methods: "); print_array_on(st, methods());
3817 st->print(BULLET"method ordering: "); print_array_on(st, method_ordering());
3818 if (default_methods() != nullptr) {
3819 st->print(BULLET"default_methods: "); print_array_on(st, default_methods());
3820 }
3821 print_on_maybe_null(st, BULLET"default vtable indices: ", default_vtable_indices());
3822 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr();
3823 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3824
3825 st->print(BULLET"secondary supers: "); secondary_supers()->print_value_on(st); st->cr();
3826 if (UseSecondarySupersTable) {
3827 st->print(BULLET"hash_slot: %d", hash_slot()); st->cr();
3828 st->print(BULLET"bitmap: " UINTX_FORMAT_X_0, _bitmap); st->cr();
3829 }
3830 if (secondary_supers() != nullptr) {
3831 if (Verbose) {
3832 bool is_hashed = UseSecondarySupersTable && (_bitmap != SECONDARY_SUPERS_BITMAP_FULL);
3833 st->print_cr(BULLET"---- secondary supers (%d words):", _secondary_supers->length());
3834 for (int i = 0; i < _secondary_supers->length(); i++) {
3835 ResourceMark rm; // for external_name()
3836 Klass* secondary_super = _secondary_supers->at(i);
3837 st->print(BULLET"%2d:", i);
3838 if (is_hashed) {
3839 int home_slot = compute_home_slot(secondary_super, _bitmap);
3859 print_on_maybe_null(st, BULLET"field type annotations: ", fields_type_annotations());
3860 {
3861 bool have_pv = false;
3862 // previous versions are linked together through the InstanceKlass
3863 for (InstanceKlass* pv_node = previous_versions();
3864 pv_node != nullptr;
3865 pv_node = pv_node->previous_versions()) {
3866 if (!have_pv)
3867 st->print(BULLET"previous version: ");
3868 have_pv = true;
3869 pv_node->constants()->print_value_on(st);
3870 }
3871 if (have_pv) st->cr();
3872 }
3873
3874 print_on_maybe_null(st, BULLET"generic signature: ", generic_signature());
3875 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr();
3876 st->print(BULLET"nest members: "); nest_members()->print_value_on(st); st->cr();
3877 print_on_maybe_null(st, BULLET"record components: ", record_components());
3878 st->print(BULLET"permitted subclasses: "); permitted_subclasses()->print_value_on(st); st->cr();
3879 st->print(BULLET"loadable descriptors: "); loadable_descriptors()->print_value_on(st); st->cr();
3880 if (java_mirror() != nullptr) {
3881 st->print(BULLET"java mirror: ");
3882 java_mirror()->print_value_on(st);
3883 st->cr();
3884 } else {
3885 st->print_cr(BULLET"java mirror: null");
3886 }
3887 st->print(BULLET"vtable length %d (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3888 if (vtable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_vtable(), vtable_length(), st);
3889 st->print(BULLET"itable length %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3890 if (itable_length() > 0 && (Verbose || WizardMode)) print_vtable(nullptr, start_of_itable(), itable_length(), st);
3891 st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3892
3893 FieldPrinter print_static_field(st);
3894 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3895 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3896 FieldPrinter print_nonstatic_field(st);
3897 InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3898 ik->print_nonstatic_fields(&print_nonstatic_field);
3899
3900 st->print(BULLET"non-static oop maps: ");
3901 OopMapBlock* map = start_of_nonstatic_oop_maps();
3902 OopMapBlock* end_map = map + nonstatic_oop_map_count();
3903 while (map < end_map) {
3904 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3905 map++;
3906 }
3907 st->cr();
3908 }
3909
3910 void InstanceKlass::print_value_on(outputStream* st) const {
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