54 #include "logging/logStream.hpp"
55 #include "memory/allocation.inline.hpp"
56 #include "memory/iterator.inline.hpp"
57 #include "memory/metadataFactory.hpp"
58 #include "memory/metaspaceClosure.hpp"
59 #include "memory/oopFactory.hpp"
60 #include "memory/resourceArea.hpp"
61 #include "memory/universe.hpp"
62 #include "oops/fieldStreams.inline.hpp"
63 #include "oops/constantPool.hpp"
64 #include "oops/instanceClassLoaderKlass.hpp"
65 #include "oops/instanceKlass.inline.hpp"
66 #include "oops/instanceMirrorKlass.hpp"
67 #include "oops/instanceOop.hpp"
68 #include "oops/instanceStackChunkKlass.hpp"
69 #include "oops/klass.inline.hpp"
70 #include "oops/method.hpp"
71 #include "oops/oop.inline.hpp"
72 #include "oops/recordComponent.hpp"
73 #include "oops/symbol.hpp"
74 #include "prims/jvmtiExport.hpp"
75 #include "prims/jvmtiRedefineClasses.hpp"
76 #include "prims/jvmtiThreadState.hpp"
77 #include "prims/methodComparator.hpp"
78 #include "runtime/arguments.hpp"
79 #include "runtime/deoptimization.hpp"
80 #include "runtime/atomic.hpp"
81 #include "runtime/fieldDescriptor.inline.hpp"
82 #include "runtime/handles.inline.hpp"
83 #include "runtime/javaCalls.hpp"
84 #include "runtime/javaThread.inline.hpp"
85 #include "runtime/mutexLocker.hpp"
86 #include "runtime/orderAccess.hpp"
87 #include "runtime/os.inline.hpp"
88 #include "runtime/reflection.hpp"
89 #include "runtime/threads.hpp"
90 #include "services/classLoadingService.hpp"
91 #include "services/finalizerService.hpp"
92 #include "services/threadService.hpp"
93 #include "utilities/dtrace.hpp"
150
151 static inline bool is_class_loader(const Symbol* class_name,
152 const ClassFileParser& parser) {
153 assert(class_name != nullptr, "invariant");
154
155 if (class_name == vmSymbols::java_lang_ClassLoader()) {
156 return true;
157 }
158
159 if (vmClasses::ClassLoader_klass_loaded()) {
160 const Klass* const super_klass = parser.super_klass();
161 if (super_klass != nullptr) {
162 if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
163 return true;
164 }
165 }
166 }
167 return false;
168 }
169
170 static inline bool is_stack_chunk_class(const Symbol* class_name,
171 const ClassLoaderData* loader_data) {
172 return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
173 loader_data->is_the_null_class_loader_data());
174 }
175
176 // private: called to verify that k is a static member of this nest.
177 // We know that k is an instance class in the same package and hence the
178 // same classloader.
179 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
180 assert(!is_hidden(), "unexpected hidden class");
181 if (_nest_members == nullptr || _nest_members == Universe::the_empty_short_array()) {
182 if (log_is_enabled(Trace, class, nestmates)) {
183 ResourceMark rm(current);
184 log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
185 k->external_name(), this->external_name());
186 }
187 return false;
188 }
189
422 log_trace(class, nestmates)("Class %s does %shave nestmate access to %s",
423 this->external_name(),
424 access ? "" : "NOT ",
425 k->external_name());
426 return access;
427 }
428
429 const char* InstanceKlass::nest_host_error() {
430 if (_nest_host_index == 0) {
431 return nullptr;
432 } else {
433 constantPoolHandle cph(Thread::current(), constants());
434 return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
435 }
436 }
437
438 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
439 const int size = InstanceKlass::size(parser.vtable_size(),
440 parser.itable_size(),
441 nonstatic_oop_map_size(parser.total_oop_map_count()),
442 parser.is_interface());
443
444 const Symbol* const class_name = parser.class_name();
445 assert(class_name != nullptr, "invariant");
446 ClassLoaderData* loader_data = parser.loader_data();
447 assert(loader_data != nullptr, "invariant");
448
449 InstanceKlass* ik;
450
451 // Allocation
452 if (parser.is_instance_ref_klass()) {
453 // java.lang.ref.Reference
454 ik = new (loader_data, size, THREAD) InstanceRefKlass(parser);
455 } else if (class_name == vmSymbols::java_lang_Class()) {
456 // mirror - java.lang.Class
457 ik = new (loader_data, size, THREAD) InstanceMirrorKlass(parser);
458 } else if (is_stack_chunk_class(class_name, loader_data)) {
459 // stack chunk
460 ik = new (loader_data, size, THREAD) InstanceStackChunkKlass(parser);
461 } else if (is_class_loader(class_name, parser)) {
462 // class loader - java.lang.ClassLoader
463 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass(parser);
464 } else {
465 // normal
466 ik = new (loader_data, size, THREAD) InstanceKlass(parser);
467 }
468
469 // Check for pending exception before adding to the loader data and incrementing
470 // class count. Can get OOM here.
471 if (HAS_PENDING_EXCEPTION) {
472 return nullptr;
473 }
474
475 return ik;
476 }
477
478
479 // copy method ordering from resource area to Metaspace
480 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
481 if (m != nullptr) {
482 // allocate a new array and copy contents (memcpy?)
483 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
484 for (int i = 0; i < m->length(); i++) {
485 _method_ordering->at_put(i, m->at(i));
486 }
487 } else {
488 _method_ordering = Universe::the_empty_int_array();
489 }
490 }
491
492 // create a new array of vtable_indices for default methods
493 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
494 Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
495 assert(default_vtable_indices() == nullptr, "only create once");
496 set_default_vtable_indices(vtable_indices);
497 return vtable_indices;
501 return new Monitor(Mutex::safepoint, name);
502 }
503
504 InstanceKlass::InstanceKlass() {
505 assert(CDSConfig::is_dumping_static_archive() || UseSharedSpaces, "only for CDS");
506 }
507
508 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
509 Klass(kind),
510 _nest_members(nullptr),
511 _nest_host(nullptr),
512 _permitted_subclasses(nullptr),
513 _record_components(nullptr),
514 _static_field_size(parser.static_field_size()),
515 _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
516 _itable_len(parser.itable_size()),
517 _nest_host_index(0),
518 _init_state(allocated),
519 _reference_type(reference_type),
520 _init_monitor(create_init_monitor("InstanceKlassInitMonitor_lock")),
521 _init_thread(nullptr)
522 {
523 set_vtable_length(parser.vtable_size());
524 set_access_flags(parser.access_flags());
525 if (parser.is_hidden()) set_is_hidden();
526 set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
527 false));
528
529 assert(nullptr == _methods, "underlying memory not zeroed?");
530 assert(is_instance_klass(), "is layout incorrect?");
531 assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
532 }
533
534 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
535 Array<Method*>* methods) {
536 if (methods != nullptr && methods != Universe::the_empty_method_array() &&
537 !methods->is_shared()) {
538 for (int i = 0; i < methods->length(); i++) {
539 Method* method = methods->at(i);
540 if (method == nullptr) continue; // maybe null if error processing
541 // Only want to delete methods that are not executing for RedefineClasses.
542 // The previous version will point to them so they're not totally dangling
543 assert (!method->on_stack(), "shouldn't be called with methods on stack");
544 MetadataFactory::free_metadata(loader_data, method);
545 }
546 MetadataFactory::free_array<Method*>(loader_data, methods);
547 }
647 (address)(secondary_supers()) != (address)(transitive_interfaces()) &&
648 !secondary_supers()->is_shared()) {
649 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers());
650 }
651 set_secondary_supers(nullptr);
652
653 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
654 set_transitive_interfaces(nullptr);
655 set_local_interfaces(nullptr);
656
657 if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
658 MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
659 }
660 set_fieldinfo_stream(nullptr);
661
662 if (fields_status() != nullptr && !fields_status()->is_shared()) {
663 MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
664 }
665 set_fields_status(nullptr);
666
667 // If a method from a redefined class is using this constant pool, don't
668 // delete it, yet. The new class's previous version will point to this.
669 if (constants() != nullptr) {
670 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
671 if (!constants()->is_shared()) {
672 MetadataFactory::free_metadata(loader_data, constants());
673 }
674 // Delete any cached resolution errors for the constant pool
675 SystemDictionary::delete_resolution_error(constants());
676
677 set_constants(nullptr);
678 }
679
680 if (inner_classes() != nullptr &&
681 inner_classes() != Universe::the_empty_short_array() &&
682 !inner_classes()->is_shared()) {
683 MetadataFactory::free_array<jushort>(loader_data, inner_classes());
684 }
685 set_inner_classes(nullptr);
686
687 if (nest_members() != nullptr &&
688 nest_members() != Universe::the_empty_short_array() &&
689 !nest_members()->is_shared()) {
690 MetadataFactory::free_array<jushort>(loader_data, nest_members());
691 }
692 set_nest_members(nullptr);
693
694 if (permitted_subclasses() != nullptr &&
695 permitted_subclasses() != Universe::the_empty_short_array() &&
696 !permitted_subclasses()->is_shared()) {
697 MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
698 }
699 set_permitted_subclasses(nullptr);
700
701 // We should deallocate the Annotations instance if it's not in shared spaces.
702 if (annotations() != nullptr && !annotations()->is_shared()) {
703 MetadataFactory::free_metadata(loader_data, annotations());
704 }
705 set_annotations(nullptr);
706
707 SystemDictionaryShared::handle_class_unloading(this);
708
709 #if INCLUDE_CDS_JAVA_HEAP
710 if (CDSConfig::is_dumping_heap()) {
711 HeapShared::remove_scratch_objects(this);
712 }
713 #endif
714 }
715
716 bool InstanceKlass::is_record() const {
717 return _record_components != nullptr &&
718 is_final() &&
719 java_super() == vmClasses::Record_klass();
720 }
860 vmSymbols::java_lang_IncompatibleClassChangeError(),
861 "class %s has interface %s as super class",
862 external_name(),
863 super_klass->external_name()
864 );
865 return false;
866 }
867
868 InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
869 ik_super->link_class_impl(CHECK_false);
870 }
871
872 // link all interfaces implemented by this class before linking this class
873 Array<InstanceKlass*>* interfaces = local_interfaces();
874 int num_interfaces = interfaces->length();
875 for (int index = 0; index < num_interfaces; index++) {
876 InstanceKlass* interk = interfaces->at(index);
877 interk->link_class_impl(CHECK_false);
878 }
879
880 // in case the class is linked in the process of linking its superclasses
881 if (is_linked()) {
882 return true;
883 }
884
885 // trace only the link time for this klass that includes
886 // the verification time
887 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
888 ClassLoader::perf_class_link_selftime(),
889 ClassLoader::perf_classes_linked(),
890 jt->get_thread_stat()->perf_recursion_counts_addr(),
891 jt->get_thread_stat()->perf_timers_addr(),
892 PerfClassTraceTime::CLASS_LINK);
893
894 // verification & rewriting
895 {
896 LockLinkState init_lock(this, jt);
897
898 // rewritten will have been set if loader constraint error found
899 // on an earlier link attempt
1149 }
1150 }
1151 }
1152
1153 // Throw error outside lock
1154 if (throw_error) {
1155 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, -1, wait);
1156 ResourceMark rm(THREAD);
1157 Handle cause(THREAD, get_initialization_error(THREAD));
1158
1159 stringStream ss;
1160 ss.print("Could not initialize class %s", external_name());
1161 if (cause.is_null()) {
1162 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1163 } else {
1164 THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1165 ss.as_string(), cause);
1166 }
1167 }
1168
1169 // Step 7
1170 // Next, if C is a class rather than an interface, initialize it's super class and super
1171 // interfaces.
1172 if (!is_interface()) {
1173 Klass* super_klass = super();
1174 if (super_klass != nullptr && super_klass->should_be_initialized()) {
1175 super_klass->initialize(THREAD);
1176 }
1177 // If C implements any interface that declares a non-static, concrete method,
1178 // the initialization of C triggers initialization of its super interfaces.
1179 // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1180 // having a superinterface that declares, non-static, concrete methods
1181 if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1182 initialize_super_interfaces(THREAD);
1183 }
1184
1185 // If any exceptions, complete abruptly, throwing the same exception as above.
1186 if (HAS_PENDING_EXCEPTION) {
1187 Handle e(THREAD, PENDING_EXCEPTION);
1188 CLEAR_PENDING_EXCEPTION;
1189 {
1190 EXCEPTION_MARK;
1191 add_initialization_error(THREAD, e);
1192 // Locks object, set state, and notify all waiting threads
1193 set_initialization_state_and_notify(initialization_error, THREAD);
1194 CLEAR_PENDING_EXCEPTION;
1195 }
1196 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1197 THROW_OOP(e());
1198 }
1199 }
1200
1201
1202 // Step 8
1203 {
1204 DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1205 if (class_initializer() != nullptr) {
1206 // Timer includes any side effects of class initialization (resolution,
1207 // etc), but not recursive entry into call_class_initializer().
1208 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1209 ClassLoader::perf_class_init_selftime(),
1210 ClassLoader::perf_classes_inited(),
1211 jt->get_thread_stat()->perf_recursion_counts_addr(),
1212 jt->get_thread_stat()->perf_timers_addr(),
1213 PerfClassTraceTime::CLASS_CLINIT);
1214 call_class_initializer(THREAD);
1215 } else {
1216 // The elapsed time is so small it's not worth counting.
1217 if (UsePerfData) {
1218 ClassLoader::perf_classes_inited()->inc();
1219 }
1220 call_class_initializer(THREAD);
1221 }
1222 }
1223
1224 // Step 9
1225 if (!HAS_PENDING_EXCEPTION) {
1226 set_initialization_state_and_notify(fully_initialized, THREAD);
1227 debug_only(vtable().verify(tty, true);)
1228 }
1229 else {
1230 // Step 10 and 11
1231 Handle e(THREAD, PENDING_EXCEPTION);
1232 CLEAR_PENDING_EXCEPTION;
1233 // JVMTI has already reported the pending exception
1234 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1235 JvmtiExport::clear_detected_exception(jt);
1236 {
1237 EXCEPTION_MARK;
1238 add_initialization_error(THREAD, e);
1239 set_initialization_state_and_notify(initialization_error, THREAD);
1240 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
1241 // JVMTI has already reported the pending exception
1242 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1243 JvmtiExport::clear_detected_exception(jt);
1244 }
1245 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1246 if (e->is_a(vmClasses::Error_klass())) {
1247 THROW_OOP(e());
1248 } else {
1249 JavaCallArguments args(e);
1250 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1536 : vmSymbols::java_lang_InstantiationException(), external_name());
1537 }
1538 if (this == vmClasses::Class_klass()) {
1539 ResourceMark rm(THREAD);
1540 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1541 : vmSymbols::java_lang_IllegalAccessException(), external_name());
1542 }
1543 }
1544
1545 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1546 // Need load-acquire for lock-free read
1547 if (array_klasses_acquire() == nullptr) {
1548 ResourceMark rm(THREAD);
1549 JavaThread *jt = THREAD;
1550 {
1551 // Atomic creation of array_klasses
1552 MutexLocker ma(THREAD, MultiArray_lock);
1553
1554 // Check if update has already taken place
1555 if (array_klasses() == nullptr) {
1556 ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, CHECK_NULL);
1557 // use 'release' to pair with lock-free load
1558 release_set_array_klasses(k);
1559 }
1560 }
1561 }
1562 // array_klasses() will always be set at this point
1563 ObjArrayKlass* oak = array_klasses();
1564 return oak->array_klass(n, THREAD);
1565 }
1566
1567 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1568 // Need load-acquire for lock-free read
1569 ObjArrayKlass* oak = array_klasses_acquire();
1570 if (oak == nullptr) {
1571 return nullptr;
1572 } else {
1573 return oak->array_klass_or_null(n);
1574 }
1575 }
1576
1577 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1578 return array_klass(1, THREAD);
1579 }
1580
1581 ArrayKlass* InstanceKlass::array_klass_or_null() {
1582 return array_klass_or_null(1);
1583 }
1584
1585 static int call_class_initializer_counter = 0; // for debugging
1586
1587 Method* InstanceKlass::class_initializer() const {
1588 Method* clinit = find_method(
1589 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1590 if (clinit != nullptr && clinit->has_valid_initializer_flags()) {
1591 return clinit;
1592 }
1593 return nullptr;
1594 }
1595
1596 void InstanceKlass::call_class_initializer(TRAPS) {
1597 if (ReplayCompiles &&
1598 (ReplaySuppressInitializers == 1 ||
1599 (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1600 // Hide the existence of the initializer for the purpose of replaying the compile
1601 return;
1602 }
1603
1604 #if INCLUDE_CDS
1605 // This is needed to ensure the consistency of the archived heap objects.
1606 if (has_archived_enum_objs()) {
1607 assert(is_shared(), "must be");
1608 bool initialized = HeapShared::initialize_enum_klass(this, CHECK);
1609 if (initialized) {
1610 return;
1621 ls.print("%d Initializing ", call_class_initializer_counter++);
1622 name()->print_value_on(&ls);
1623 ls.print_cr("%s (" PTR_FORMAT ") by thread \"%s\"",
1624 h_method() == nullptr ? "(no method)" : "", p2i(this),
1625 THREAD->name());
1626 }
1627 if (h_method() != nullptr) {
1628 JavaCallArguments args; // No arguments
1629 JavaValue result(T_VOID);
1630 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
1631 }
1632 }
1633
1634
1635 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1636 InterpreterOopMap* entry_for) {
1637 // Lazily create the _oop_map_cache at first request
1638 // Lock-free access requires load_acquire.
1639 OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1640 if (oop_map_cache == nullptr) {
1641 MutexLocker x(OopMapCacheAlloc_lock);
1642 // Check if _oop_map_cache was allocated while we were waiting for this lock
1643 if ((oop_map_cache = _oop_map_cache) == nullptr) {
1644 oop_map_cache = new OopMapCache();
1645 // Ensure _oop_map_cache is stable, since it is examined without a lock
1646 Atomic::release_store(&_oop_map_cache, oop_map_cache);
1647 }
1648 }
1649 // _oop_map_cache is constant after init; lookup below does its own locking.
1650 oop_map_cache->lookup(method, bci, entry_for);
1651 }
1652
1653 bool InstanceKlass::contains_field_offset(int offset) {
1654 fieldDescriptor fd;
1655 return find_field_from_offset(offset, false, &fd);
1656 }
1657
1658 FieldInfo InstanceKlass::field(int index) const {
1659 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1660 if (fs.index() == index) {
1661 return fs.to_FieldInfo();
1662 }
1663 }
1664 fatal("Field not found");
1665 return FieldInfo();
1666 }
1667
1668 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1669 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1670 Symbol* f_name = fs.name();
1671 Symbol* f_sig = fs.signature();
1672 if (f_name == name && f_sig == sig) {
1673 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1674 return true;
1675 }
1676 }
1718
1719 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1720 // search order according to newest JVM spec (5.4.3.2, p.167).
1721 // 1) search for field in current klass
1722 if (find_local_field(name, sig, fd)) {
1723 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1724 }
1725 // 2) search for field recursively in direct superinterfaces
1726 if (is_static) {
1727 Klass* intf = find_interface_field(name, sig, fd);
1728 if (intf != nullptr) return intf;
1729 }
1730 // 3) apply field lookup recursively if superclass exists
1731 { Klass* supr = super();
1732 if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1733 }
1734 // 4) otherwise field lookup fails
1735 return nullptr;
1736 }
1737
1738
1739 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1740 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1741 if (fs.offset() == offset) {
1742 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1743 if (fd->is_static() == is_static) return true;
1744 }
1745 }
1746 return false;
1747 }
1748
1749
1750 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1751 Klass* klass = const_cast<InstanceKlass*>(this);
1752 while (klass != nullptr) {
1753 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1754 return true;
1755 }
1756 klass = klass->super();
1757 }
2109 }
2110
2111 // uncached_lookup_method searches both the local class methods array and all
2112 // superclasses methods arrays, skipping any overpass methods in superclasses,
2113 // and possibly skipping private methods.
2114 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2115 const Symbol* signature,
2116 OverpassLookupMode overpass_mode,
2117 PrivateLookupMode private_mode) const {
2118 OverpassLookupMode overpass_local_mode = overpass_mode;
2119 const Klass* klass = this;
2120 while (klass != nullptr) {
2121 Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2122 signature,
2123 overpass_local_mode,
2124 StaticLookupMode::find,
2125 private_mode);
2126 if (method != nullptr) {
2127 return method;
2128 }
2129 klass = klass->super();
2130 overpass_local_mode = OverpassLookupMode::skip; // Always ignore overpass methods in superclasses
2131 }
2132 return nullptr;
2133 }
2134
2135 #ifdef ASSERT
2136 // search through class hierarchy and return true if this class or
2137 // one of the superclasses was redefined
2138 bool InstanceKlass::has_redefined_this_or_super() const {
2139 const Klass* klass = this;
2140 while (klass != nullptr) {
2141 if (InstanceKlass::cast(klass)->has_been_redefined()) {
2142 return true;
2143 }
2144 klass = klass->super();
2145 }
2146 return false;
2147 }
2148 #endif
2589 int method_table_offset_in_words = ioe->offset()/wordSize;
2590 int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2591
2592 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2593 / itableOffsetEntry::size();
2594
2595 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2596 if (ioe->interface_klass() != nullptr) {
2597 it->push(ioe->interface_klass_addr());
2598 itableMethodEntry* ime = ioe->first_method_entry(this);
2599 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2600 for (int index = 0; index < n; index ++) {
2601 it->push(ime[index].method_addr());
2602 }
2603 }
2604 }
2605 }
2606
2607 it->push(&_nest_members);
2608 it->push(&_permitted_subclasses);
2609 it->push(&_record_components);
2610 }
2611
2612 #if INCLUDE_CDS
2613 void InstanceKlass::remove_unshareable_info() {
2614
2615 if (is_linked()) {
2616 assert(can_be_verified_at_dumptime(), "must be");
2617 // Remember this so we can avoid walking the hierarchy at runtime.
2618 set_verified_at_dump_time();
2619 }
2620
2621 Klass::remove_unshareable_info();
2622
2623 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2624 // Classes are attempted to link during dumping and may fail,
2625 // but these classes are still in the dictionary and class list in CLD.
2626 // If the class has failed verification, there is nothing else to remove.
2627 return;
2628 }
2629
2633 // being added to class hierarchy (see InstanceKlass:::add_to_hierarchy()).
2634 _init_state = allocated;
2635
2636 { // Otherwise this needs to take out the Compile_lock.
2637 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2638 init_implementor();
2639 }
2640
2641 constants()->remove_unshareable_info();
2642
2643 for (int i = 0; i < methods()->length(); i++) {
2644 Method* m = methods()->at(i);
2645 m->remove_unshareable_info();
2646 }
2647
2648 // do array classes also.
2649 if (array_klasses() != nullptr) {
2650 array_klasses()->remove_unshareable_info();
2651 }
2652
2653 // These are not allocated from metaspace. They are safe to set to null.
2654 _source_debug_extension = nullptr;
2655 _dep_context = nullptr;
2656 _osr_nmethods_head = nullptr;
2657 #if INCLUDE_JVMTI
2658 _breakpoints = nullptr;
2659 _previous_versions = nullptr;
2660 _cached_class_file = nullptr;
2661 _jvmti_cached_class_field_map = nullptr;
2662 #endif
2663
2664 _init_thread = nullptr;
2665 _methods_jmethod_ids = nullptr;
2666 _jni_ids = nullptr;
2667 _oop_map_cache = nullptr;
2668 // clear _nest_host to ensure re-load at runtime
2669 _nest_host = nullptr;
2670 init_shared_package_entry();
2671 _dep_context_last_cleaned = 0;
2672 _init_monitor = nullptr;
2673
2718 void InstanceKlass::compute_has_loops_flag_for_methods() {
2719 Array<Method*>* methods = this->methods();
2720 for (int index = 0; index < methods->length(); ++index) {
2721 Method* m = methods->at(index);
2722 if (!m->is_overpass()) { // work around JDK-8305771
2723 m->compute_has_loops_flag();
2724 }
2725 }
2726 }
2727
2728 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2729 PackageEntry* pkg_entry, TRAPS) {
2730 // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
2731 // before the InstanceKlass is added to the SystemDictionary. Make
2732 // sure the current state is <loaded.
2733 assert(!is_loaded(), "invalid init state");
2734 assert(!shared_loading_failed(), "Must not try to load failed class again");
2735 set_package(loader_data, pkg_entry, CHECK);
2736 Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2737
2738 Array<Method*>* methods = this->methods();
2739 int num_methods = methods->length();
2740 for (int index = 0; index < num_methods; ++index) {
2741 methods->at(index)->restore_unshareable_info(CHECK);
2742 }
2743 #if INCLUDE_JVMTI
2744 if (JvmtiExport::has_redefined_a_class()) {
2745 // Reinitialize vtable because RedefineClasses may have changed some
2746 // entries in this vtable for super classes so the CDS vtable might
2747 // point to old or obsolete entries. RedefineClasses doesn't fix up
2748 // vtables in the shared system dictionary, only the main one.
2749 // It also redefines the itable too so fix that too.
2750 // First fix any default methods that point to a super class that may
2751 // have been redefined.
2752 bool trace_name_printed = false;
2753 adjust_default_methods(&trace_name_printed);
2754 vtable().initialize_vtable();
2755 itable().initialize_itable();
2756 }
2757 #endif
2758
2759 // restore constant pool resolved references
2760 constants()->restore_unshareable_info(CHECK);
2761
2762 if (array_klasses() != nullptr) {
2763 // To get a consistent list of classes we need MultiArray_lock to ensure
2764 // array classes aren't observed while they are being restored.
2765 MutexLocker ml(MultiArray_lock);
2766 assert(this == array_klasses()->bottom_klass(), "sanity");
2767 // Array classes have null protection domain.
2768 // --> see ArrayKlass::complete_create_array_klass()
2769 array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
2770 }
2771
2772 // Initialize @ValueBased class annotation
2773 if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation()) {
2774 set_is_value_based();
2775 }
2776
2777 // restore the monitor
2778 _init_monitor = create_init_monitor("InstanceKlassInitMonitorRestored_lock");
2779 }
2780
2781 // Check if a class or any of its supertypes has a version older than 50.
2782 // CDS will not perform verification of old classes during dump time because
2783 // without changing the old verifier, the verification constraint cannot be
2784 // retrieved during dump time.
2785 // Verification of archived old classes will be performed during run time.
2786 bool InstanceKlass::can_be_verified_at_dumptime() const {
2945 } else {
2946 // Adding one to the attribute length in order to store a null terminator
2947 // character could cause an overflow because the attribute length is
2948 // already coded with an u4 in the classfile, but in practice, it's
2949 // unlikely to happen.
2950 assert((length+1) > length, "Overflow checking");
2951 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
2952 for (int i = 0; i < length; i++) {
2953 sde[i] = array[i];
2954 }
2955 sde[length] = '\0';
2956 _source_debug_extension = sde;
2957 }
2958 }
2959
2960 Symbol* InstanceKlass::generic_signature() const { return _constants->generic_signature(); }
2961 u2 InstanceKlass::generic_signature_index() const { return _constants->generic_signature_index(); }
2962 void InstanceKlass::set_generic_signature_index(u2 sig_index) { _constants->set_generic_signature_index(sig_index); }
2963
2964 const char* InstanceKlass::signature_name() const {
2965
2966 // Get the internal name as a c string
2967 const char* src = (const char*) (name()->as_C_string());
2968 const int src_length = (int)strlen(src);
2969
2970 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
2971
2972 // Add L as type indicator
2973 int dest_index = 0;
2974 dest[dest_index++] = JVM_SIGNATURE_CLASS;
2975
2976 // Add the actual class name
2977 for (int src_index = 0; src_index < src_length; ) {
2978 dest[dest_index++] = src[src_index++];
2979 }
2980
2981 if (is_hidden()) { // Replace the last '+' with a '.'.
2982 for (int index = (int)src_length; index > 0; index--) {
2983 if (dest[index] == '+') {
2984 dest[index] = JVM_SIGNATURE_DOT;
2985 break;
2986 }
2987 }
2988 }
2989
2990 // Add the semicolon and the null
2991 dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
2992 dest[dest_index] = '\0';
2993 return dest;
2994 }
3296 jint InstanceKlass::compute_modifier_flags() const {
3297 jint access = access_flags().as_int();
3298
3299 // But check if it happens to be member class.
3300 InnerClassesIterator iter(this);
3301 for (; !iter.done(); iter.next()) {
3302 int ioff = iter.inner_class_info_index();
3303 // Inner class attribute can be zero, skip it.
3304 // Strange but true: JVM spec. allows null inner class refs.
3305 if (ioff == 0) continue;
3306
3307 // only look at classes that are already loaded
3308 // since we are looking for the flags for our self.
3309 Symbol* inner_name = constants()->klass_name_at(ioff);
3310 if (name() == inner_name) {
3311 // This is really a member class.
3312 access = iter.inner_access_flags();
3313 break;
3314 }
3315 }
3316 // Remember to strip ACC_SUPER bit
3317 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS;
3318 }
3319
3320 jint InstanceKlass::jvmti_class_status() const {
3321 jint result = 0;
3322
3323 if (is_linked()) {
3324 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3325 }
3326
3327 if (is_initialized()) {
3328 assert(is_linked(), "Class status is not consistent");
3329 result |= JVMTI_CLASS_STATUS_INITIALIZED;
3330 }
3331 if (is_in_error_state()) {
3332 result |= JVMTI_CLASS_STATUS_ERROR;
3333 }
3334 return result;
3335 }
3336
3337 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {
3551 }
3552 osr = osr->osr_link();
3553 }
3554
3555 assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3556 if (best != nullptr && best->comp_level() >= comp_level) {
3557 return best;
3558 }
3559 return nullptr;
3560 }
3561
3562 // -----------------------------------------------------------------------------------------------------
3563 // Printing
3564
3565 #define BULLET " - "
3566
3567 static const char* state_names[] = {
3568 "allocated", "loaded", "being_linked", "linked", "being_initialized", "fully_initialized", "initialization_error"
3569 };
3570
3571 static void print_vtable(intptr_t* start, int len, outputStream* st) {
3572 for (int i = 0; i < len; i++) {
3573 intptr_t e = start[i];
3574 st->print("%d : " INTPTR_FORMAT, i, e);
3575 if (MetaspaceObj::is_valid((Metadata*)e)) {
3576 st->print(" ");
3577 ((Metadata*)e)->print_value_on(st);
3578 }
3579 st->cr();
3580 }
3581 }
3582
3583 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3584 return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);
3585 }
3586
3587 const char* InstanceKlass::init_state_name() const {
3588 return state_names[init_state()];
3589 }
3590
3591 void InstanceKlass::print_on(outputStream* st) const {
3592 assert(is_klass(), "must be klass");
3593 Klass::print_on(st);
3594
3595 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3596 st->print(BULLET"klass size: %d", size()); st->cr();
3597 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3598 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3599 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3600 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3601 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3602 st->print(BULLET"sub: ");
3603 Klass* sub = subklass();
3604 int n;
3605 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3606 if (n < MaxSubklassPrintSize) {
3607 sub->print_value_on(st);
3608 st->print(" ");
3609 }
3610 }
3611 if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3612 st->cr();
3613
3614 if (is_interface()) {
3615 st->print_cr(BULLET"nof implementors: %d", nof_implementors());
3616 if (nof_implementors() == 1) {
3617 st->print_cr(BULLET"implementor: ");
3618 st->print(" ");
3619 implementor()->print_value_on(st);
3620 st->cr();
3621 }
3622 }
3623
3624 st->print(BULLET"arrays: "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3625 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr();
3626 if (Verbose || WizardMode) {
3627 Array<Method*>* method_array = methods();
3628 for (int i = 0; i < method_array->length(); i++) {
3629 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3630 }
3631 }
3632 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr();
3633 st->print(BULLET"default_methods: "); default_methods()->print_value_on(st); st->cr();
3634 if (Verbose && default_methods() != nullptr) {
3635 Array<Method*>* method_array = default_methods();
3636 for (int i = 0; i < method_array->length(); i++) {
3637 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3638 }
3639 }
3640 if (default_vtable_indices() != nullptr) {
3641 st->print(BULLET"default vtable indices: "); default_vtable_indices()->print_value_on(st); st->cr();
3642 }
3643 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr();
3644 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3645 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr();
3646 if (class_loader_data() != nullptr) {
3647 st->print(BULLET"class loader data: ");
3648 class_loader_data()->print_value_on(st);
3649 st->cr();
3650 }
3651 if (source_file_name() != nullptr) {
3652 st->print(BULLET"source file: ");
3653 source_file_name()->print_value_on(st);
3654 st->cr();
3655 }
3656 if (source_debug_extension() != nullptr) {
3657 st->print(BULLET"source debug extension: ");
3658 st->print("%s", source_debug_extension());
3659 st->cr();
3660 }
3661 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr();
3662 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr();
3663 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr();
3664 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr();
3670 pv_node = pv_node->previous_versions()) {
3671 if (!have_pv)
3672 st->print(BULLET"previous version: ");
3673 have_pv = true;
3674 pv_node->constants()->print_value_on(st);
3675 }
3676 if (have_pv) st->cr();
3677 }
3678
3679 if (generic_signature() != nullptr) {
3680 st->print(BULLET"generic signature: ");
3681 generic_signature()->print_value_on(st);
3682 st->cr();
3683 }
3684 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr();
3685 st->print(BULLET"nest members: "); nest_members()->print_value_on(st); st->cr();
3686 if (record_components() != nullptr) {
3687 st->print(BULLET"record components: "); record_components()->print_value_on(st); st->cr();
3688 }
3689 st->print(BULLET"permitted subclasses: "); permitted_subclasses()->print_value_on(st); st->cr();
3690 if (java_mirror() != nullptr) {
3691 st->print(BULLET"java mirror: ");
3692 java_mirror()->print_value_on(st);
3693 st->cr();
3694 } else {
3695 st->print_cr(BULLET"java mirror: null");
3696 }
3697 st->print(BULLET"vtable length %d (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3698 if (vtable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_vtable(), vtable_length(), st);
3699 st->print(BULLET"itable length %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3700 if (itable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_itable(), itable_length(), st);
3701 st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3702 FieldPrinter print_static_field(st);
3703 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3704 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3705 FieldPrinter print_nonstatic_field(st);
3706 InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3707 ik->print_nonstatic_fields(&print_nonstatic_field);
3708
3709 st->print(BULLET"non-static oop maps: ");
3710 OopMapBlock* map = start_of_nonstatic_oop_maps();
3711 OopMapBlock* end_map = map + nonstatic_oop_map_count();
3712 while (map < end_map) {
3713 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3714 map++;
3715 }
3716 st->cr();
3717 }
3718
3719 void InstanceKlass::print_value_on(outputStream* st) const {
3720 assert(is_klass(), "must be klass");
|
54 #include "logging/logStream.hpp"
55 #include "memory/allocation.inline.hpp"
56 #include "memory/iterator.inline.hpp"
57 #include "memory/metadataFactory.hpp"
58 #include "memory/metaspaceClosure.hpp"
59 #include "memory/oopFactory.hpp"
60 #include "memory/resourceArea.hpp"
61 #include "memory/universe.hpp"
62 #include "oops/fieldStreams.inline.hpp"
63 #include "oops/constantPool.hpp"
64 #include "oops/instanceClassLoaderKlass.hpp"
65 #include "oops/instanceKlass.inline.hpp"
66 #include "oops/instanceMirrorKlass.hpp"
67 #include "oops/instanceOop.hpp"
68 #include "oops/instanceStackChunkKlass.hpp"
69 #include "oops/klass.inline.hpp"
70 #include "oops/method.hpp"
71 #include "oops/oop.inline.hpp"
72 #include "oops/recordComponent.hpp"
73 #include "oops/symbol.hpp"
74 #include "oops/inlineKlass.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/threads.hpp"
91 #include "services/classLoadingService.hpp"
92 #include "services/finalizerService.hpp"
93 #include "services/threadService.hpp"
94 #include "utilities/dtrace.hpp"
151
152 static inline bool is_class_loader(const Symbol* class_name,
153 const ClassFileParser& parser) {
154 assert(class_name != nullptr, "invariant");
155
156 if (class_name == vmSymbols::java_lang_ClassLoader()) {
157 return true;
158 }
159
160 if (vmClasses::ClassLoader_klass_loaded()) {
161 const Klass* const super_klass = parser.super_klass();
162 if (super_klass != nullptr) {
163 if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
164 return true;
165 }
166 }
167 }
168 return false;
169 }
170
171 bool InstanceKlass::field_is_null_free_inline_type(int index) const {
172 return field(index).field_flags().is_null_free_inline_type();
173 }
174
175 bool InstanceKlass::is_class_in_loadable_descriptors_attribute(Symbol* name) const {
176 if (_loadable_descriptors == nullptr) return false;
177 for (int i = 0; i < _loadable_descriptors->length(); i++) {
178 Symbol* class_name = _constants->klass_at_noresolve(_loadable_descriptors->at(i));
179 if (class_name == name) return true;
180 }
181 return false;
182 }
183
184 static inline bool is_stack_chunk_class(const Symbol* class_name,
185 const ClassLoaderData* loader_data) {
186 return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
187 loader_data->is_the_null_class_loader_data());
188 }
189
190 // private: called to verify that k is a static member of this nest.
191 // We know that k is an instance class in the same package and hence the
192 // same classloader.
193 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
194 assert(!is_hidden(), "unexpected hidden class");
195 if (_nest_members == nullptr || _nest_members == Universe::the_empty_short_array()) {
196 if (log_is_enabled(Trace, class, nestmates)) {
197 ResourceMark rm(current);
198 log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
199 k->external_name(), this->external_name());
200 }
201 return false;
202 }
203
436 log_trace(class, nestmates)("Class %s does %shave nestmate access to %s",
437 this->external_name(),
438 access ? "" : "NOT ",
439 k->external_name());
440 return access;
441 }
442
443 const char* InstanceKlass::nest_host_error() {
444 if (_nest_host_index == 0) {
445 return nullptr;
446 } else {
447 constantPoolHandle cph(Thread::current(), constants());
448 return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
449 }
450 }
451
452 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
453 const int size = InstanceKlass::size(parser.vtable_size(),
454 parser.itable_size(),
455 nonstatic_oop_map_size(parser.total_oop_map_count()),
456 parser.is_interface(),
457 parser.is_inline_type());
458
459 const Symbol* const class_name = parser.class_name();
460 assert(class_name != nullptr, "invariant");
461 ClassLoaderData* loader_data = parser.loader_data();
462 assert(loader_data != nullptr, "invariant");
463
464 InstanceKlass* ik;
465
466 // Allocation
467 if (parser.is_instance_ref_klass()) {
468 // java.lang.ref.Reference
469 ik = new (loader_data, size, THREAD) InstanceRefKlass(parser);
470 } else if (class_name == vmSymbols::java_lang_Class()) {
471 // mirror - java.lang.Class
472 ik = new (loader_data, size, THREAD) InstanceMirrorKlass(parser);
473 } else if (is_stack_chunk_class(class_name, loader_data)) {
474 // stack chunk
475 ik = new (loader_data, size, THREAD) InstanceStackChunkKlass(parser);
476 } else if (is_class_loader(class_name, parser)) {
477 // class loader - java.lang.ClassLoader
478 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass(parser);
479 } else if (parser.is_inline_type()) {
480 // inline type
481 ik = new (loader_data, size, THREAD) InlineKlass(parser);
482 } else {
483 // normal
484 ik = new (loader_data, size, THREAD) InstanceKlass(parser);
485 }
486
487 // Check for pending exception before adding to the loader data and incrementing
488 // class count. Can get OOM here.
489 if (HAS_PENDING_EXCEPTION) {
490 return nullptr;
491 }
492
493 #ifdef ASSERT
494 ik->bounds_check((address) ik->start_of_vtable(), false, size);
495 ik->bounds_check((address) ik->start_of_itable(), false, size);
496 ik->bounds_check((address) ik->end_of_itable(), true, size);
497 ik->bounds_check((address) ik->end_of_nonstatic_oop_maps(), true, size);
498 #endif //ASSERT
499 return ik;
500 }
501
502 #ifndef PRODUCT
503 bool InstanceKlass::bounds_check(address addr, bool edge_ok, intptr_t size_in_bytes) const {
504 const char* bad = nullptr;
505 address end = nullptr;
506 if (addr < (address)this) {
507 bad = "before";
508 } else if (addr == (address)this) {
509 if (edge_ok) return true;
510 bad = "just before";
511 } else if (addr == (end = (address)this + sizeof(intptr_t) * (size_in_bytes < 0 ? size() : size_in_bytes))) {
512 if (edge_ok) return true;
513 bad = "just after";
514 } else if (addr > end) {
515 bad = "after";
516 } else {
517 return true;
518 }
519 tty->print_cr("%s object bounds: " INTPTR_FORMAT " [" INTPTR_FORMAT ".." INTPTR_FORMAT "]",
520 bad, (intptr_t)addr, (intptr_t)this, (intptr_t)end);
521 Verbose = WizardMode = true; this->print(); //@@
522 return false;
523 }
524 #endif //PRODUCT
525
526 // copy method ordering from resource area to Metaspace
527 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
528 if (m != nullptr) {
529 // allocate a new array and copy contents (memcpy?)
530 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
531 for (int i = 0; i < m->length(); i++) {
532 _method_ordering->at_put(i, m->at(i));
533 }
534 } else {
535 _method_ordering = Universe::the_empty_int_array();
536 }
537 }
538
539 // create a new array of vtable_indices for default methods
540 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
541 Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
542 assert(default_vtable_indices() == nullptr, "only create once");
543 set_default_vtable_indices(vtable_indices);
544 return vtable_indices;
548 return new Monitor(Mutex::safepoint, name);
549 }
550
551 InstanceKlass::InstanceKlass() {
552 assert(CDSConfig::is_dumping_static_archive() || UseSharedSpaces, "only for CDS");
553 }
554
555 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
556 Klass(kind),
557 _nest_members(nullptr),
558 _nest_host(nullptr),
559 _permitted_subclasses(nullptr),
560 _record_components(nullptr),
561 _static_field_size(parser.static_field_size()),
562 _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
563 _itable_len(parser.itable_size()),
564 _nest_host_index(0),
565 _init_state(allocated),
566 _reference_type(reference_type),
567 _init_monitor(create_init_monitor("InstanceKlassInitMonitor_lock")),
568 _init_thread(nullptr),
569 _inline_type_field_klasses(nullptr),
570 _null_marker_offsets(nullptr),
571 _loadable_descriptors(nullptr),
572 _adr_inlineklass_fixed_block(nullptr)
573 {
574 set_vtable_length(parser.vtable_size());
575 set_access_flags(parser.access_flags());
576 if (parser.is_hidden()) set_is_hidden();
577 set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
578 false));
579 if (parser.has_inline_fields()) {
580 set_has_inline_type_fields();
581 }
582
583 assert(nullptr == _methods, "underlying memory not zeroed?");
584 assert(is_instance_klass(), "is layout incorrect?");
585 assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
586 }
587
588 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
589 Array<Method*>* methods) {
590 if (methods != nullptr && methods != Universe::the_empty_method_array() &&
591 !methods->is_shared()) {
592 for (int i = 0; i < methods->length(); i++) {
593 Method* method = methods->at(i);
594 if (method == nullptr) continue; // maybe null if error processing
595 // Only want to delete methods that are not executing for RedefineClasses.
596 // The previous version will point to them so they're not totally dangling
597 assert (!method->on_stack(), "shouldn't be called with methods on stack");
598 MetadataFactory::free_metadata(loader_data, method);
599 }
600 MetadataFactory::free_array<Method*>(loader_data, methods);
601 }
701 (address)(secondary_supers()) != (address)(transitive_interfaces()) &&
702 !secondary_supers()->is_shared()) {
703 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers());
704 }
705 set_secondary_supers(nullptr);
706
707 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
708 set_transitive_interfaces(nullptr);
709 set_local_interfaces(nullptr);
710
711 if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
712 MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
713 }
714 set_fieldinfo_stream(nullptr);
715
716 if (fields_status() != nullptr && !fields_status()->is_shared()) {
717 MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
718 }
719 set_fields_status(nullptr);
720
721 if (inline_type_field_klasses_array() != nullptr) {
722 MetadataFactory::free_array<InlineKlass*>(loader_data, inline_type_field_klasses_array());
723 set_inline_type_field_klasses_array(nullptr);
724 }
725
726 if (null_marker_offsets_array() != nullptr) {
727 MetadataFactory::free_array<int>(loader_data, null_marker_offsets_array());
728 set_null_marker_offsets_array(nullptr);
729 }
730
731 // If a method from a redefined class is using this constant pool, don't
732 // delete it, yet. The new class's previous version will point to this.
733 if (constants() != nullptr) {
734 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
735 if (!constants()->is_shared()) {
736 MetadataFactory::free_metadata(loader_data, constants());
737 }
738 // Delete any cached resolution errors for the constant pool
739 SystemDictionary::delete_resolution_error(constants());
740
741 set_constants(nullptr);
742 }
743
744 if (inner_classes() != nullptr &&
745 inner_classes() != Universe::the_empty_short_array() &&
746 !inner_classes()->is_shared()) {
747 MetadataFactory::free_array<jushort>(loader_data, inner_classes());
748 }
749 set_inner_classes(nullptr);
750
751 if (nest_members() != nullptr &&
752 nest_members() != Universe::the_empty_short_array() &&
753 !nest_members()->is_shared()) {
754 MetadataFactory::free_array<jushort>(loader_data, nest_members());
755 }
756 set_nest_members(nullptr);
757
758 if (permitted_subclasses() != nullptr &&
759 permitted_subclasses() != Universe::the_empty_short_array() &&
760 !permitted_subclasses()->is_shared()) {
761 MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
762 }
763 set_permitted_subclasses(nullptr);
764
765 if (loadable_descriptors() != nullptr &&
766 loadable_descriptors() != Universe::the_empty_short_array() &&
767 !loadable_descriptors()->is_shared()) {
768 MetadataFactory::free_array<jushort>(loader_data, loadable_descriptors());
769 }
770 set_loadable_descriptors(nullptr);
771
772 // We should deallocate the Annotations instance if it's not in shared spaces.
773 if (annotations() != nullptr && !annotations()->is_shared()) {
774 MetadataFactory::free_metadata(loader_data, annotations());
775 }
776 set_annotations(nullptr);
777
778 SystemDictionaryShared::handle_class_unloading(this);
779
780 #if INCLUDE_CDS_JAVA_HEAP
781 if (CDSConfig::is_dumping_heap()) {
782 HeapShared::remove_scratch_objects(this);
783 }
784 #endif
785 }
786
787 bool InstanceKlass::is_record() const {
788 return _record_components != nullptr &&
789 is_final() &&
790 java_super() == vmClasses::Record_klass();
791 }
931 vmSymbols::java_lang_IncompatibleClassChangeError(),
932 "class %s has interface %s as super class",
933 external_name(),
934 super_klass->external_name()
935 );
936 return false;
937 }
938
939 InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
940 ik_super->link_class_impl(CHECK_false);
941 }
942
943 // link all interfaces implemented by this class before linking this class
944 Array<InstanceKlass*>* interfaces = local_interfaces();
945 int num_interfaces = interfaces->length();
946 for (int index = 0; index < num_interfaces; index++) {
947 InstanceKlass* interk = interfaces->at(index);
948 interk->link_class_impl(CHECK_false);
949 }
950
951
952 // If a class declares a method that uses an inline class as an argument
953 // type or return inline type, this inline class must be loaded during the
954 // linking of this class because size and properties of the inline class
955 // must be known in order to be able to perform inline type optimizations.
956 // The implementation below is an approximation of this rule, the code
957 // iterates over all methods of the current class (including overridden
958 // methods), not only the methods declared by this class. This
959 // approximation makes the code simpler, and doesn't change the semantic
960 // because classes declaring methods overridden by the current class are
961 // linked (and have performed their own pre-loading) before the linking
962 // of the current class.
963
964
965 // Note:
966 // Inline class types are loaded during
967 // the loading phase (see ClassFileParser::post_process_parsed_stream()).
968 // Inline class types used as element types for array creation
969 // are not pre-loaded. Their loading is triggered by either anewarray
970 // or multianewarray bytecodes.
971
972 // Could it be possible to do the following processing only if the
973 // class uses inline types?
974 if (EnableValhalla) {
975 ResourceMark rm(THREAD);
976 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
977 if (fs.is_null_free_inline_type() && fs.access_flags().is_static()) {
978 Symbol* sig = fs.signature();
979 TempNewSymbol s = Signature::strip_envelope(sig);
980 if (s != name()) {
981 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());
982 Klass* klass = SystemDictionary::resolve_or_fail(s,
983 Handle(THREAD, class_loader()), Handle(THREAD, protection_domain()), true,
984 CHECK_false);
985 if (HAS_PENDING_EXCEPTION) {
986 log_warning(class, preload)("Preloading of class %s during linking of class %s (cause: null-free static field) failed: %s",
987 s->as_C_string(), name()->as_C_string(), PENDING_EXCEPTION->klass()->name()->as_C_string());
988 return false; // Exception is still pending
989 }
990 log_info(class, preload)("Preloading of class %s during linking of class %s (cause: null-free static field) succeeded",
991 s->as_C_string(), name()->as_C_string());
992 assert(klass != nullptr, "Sanity check");
993 if (!klass->is_inline_klass()) {
994 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
995 err_msg("class %s expects class %s to be a value class but it is an identity class",
996 name()->as_C_string(), klass->external_name()), false);
997 }
998 if (klass->is_abstract()) {
999 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
1000 err_msg("Class %s expects class %s to be concrete value class, but it is an abstract class",
1001 name()->as_C_string(),
1002 InstanceKlass::cast(klass)->external_name()), false);
1003 }
1004 InstanceKlass* ik = InstanceKlass::cast(klass);
1005 if (!ik->is_implicitly_constructible()) {
1006 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
1007 err_msg("class %s is not implicitly constructible and it is used in a null restricted static field (not supported)",
1008 klass->external_name()), false);
1009 }
1010 // the inline_type_field_klasses_array might have been loaded with CDS, so update only if not already set and check consistency
1011 if (inline_type_field_klasses_array()->at(fs.index()) == nullptr) {
1012 set_inline_type_field_klass(fs.index(), InlineKlass::cast(ik));
1013 }
1014 assert(get_inline_type_field_klass(fs.index()) == ik, "Must match");
1015 } else {
1016 if (inline_type_field_klasses_array()->at(fs.index()) == nullptr) {
1017 set_inline_type_field_klass(fs.index(), InlineKlass::cast(this));
1018 }
1019 assert(get_inline_type_field_klass(fs.index()) == this, "Must match");
1020 }
1021 }
1022 }
1023
1024 // Aggressively preloading all classes from the LoadableDescriptors attribute
1025 if (loadable_descriptors() != nullptr) {
1026 HandleMark hm(THREAD);
1027 for (int i = 0; i < loadable_descriptors()->length(); i++) {
1028 Symbol* sig = constants()->symbol_at(loadable_descriptors()->at(i));
1029 TempNewSymbol class_name = Signature::strip_envelope(sig);
1030 if (class_name == name()) continue;
1031 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());
1032 oop loader = class_loader();
1033 oop protection_domain = this->protection_domain();
1034 Klass* klass = SystemDictionary::resolve_or_null(class_name,
1035 Handle(THREAD, loader), Handle(THREAD, protection_domain), THREAD);
1036 if (HAS_PENDING_EXCEPTION) {
1037 CLEAR_PENDING_EXCEPTION;
1038 }
1039 if (klass != nullptr) {
1040 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());
1041 if (!klass->is_inline_klass()) {
1042 // Non value class are allowed by the current spec, but it could be an indication of an issue so let's log a warning
1043 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());
1044 }
1045 } else {
1046 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());
1047 }
1048 }
1049 }
1050 }
1051
1052 // in case the class is linked in the process of linking its superclasses
1053 if (is_linked()) {
1054 return true;
1055 }
1056
1057 // trace only the link time for this klass that includes
1058 // the verification time
1059 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
1060 ClassLoader::perf_class_link_selftime(),
1061 ClassLoader::perf_classes_linked(),
1062 jt->get_thread_stat()->perf_recursion_counts_addr(),
1063 jt->get_thread_stat()->perf_timers_addr(),
1064 PerfClassTraceTime::CLASS_LINK);
1065
1066 // verification & rewriting
1067 {
1068 LockLinkState init_lock(this, jt);
1069
1070 // rewritten will have been set if loader constraint error found
1071 // on an earlier link attempt
1321 }
1322 }
1323 }
1324
1325 // Throw error outside lock
1326 if (throw_error) {
1327 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, -1, wait);
1328 ResourceMark rm(THREAD);
1329 Handle cause(THREAD, get_initialization_error(THREAD));
1330
1331 stringStream ss;
1332 ss.print("Could not initialize class %s", external_name());
1333 if (cause.is_null()) {
1334 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1335 } else {
1336 THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1337 ss.as_string(), cause);
1338 }
1339 }
1340
1341 // Pre-allocating an instance of the default value
1342 if (is_inline_klass()) {
1343 InlineKlass* vk = InlineKlass::cast(this);
1344 oop val = vk->allocate_instance(THREAD);
1345 if (HAS_PENDING_EXCEPTION) {
1346 Handle e(THREAD, PENDING_EXCEPTION);
1347 CLEAR_PENDING_EXCEPTION;
1348 {
1349 EXCEPTION_MARK;
1350 add_initialization_error(THREAD, e);
1351 // Locks object, set state, and notify all waiting threads
1352 set_initialization_state_and_notify(initialization_error, THREAD);
1353 CLEAR_PENDING_EXCEPTION;
1354 }
1355 THROW_OOP(e());
1356 }
1357 vk->set_default_value(val);
1358 }
1359
1360 // Step 7
1361 // Next, if C is a class rather than an interface, initialize it's super class and super
1362 // interfaces.
1363 if (!is_interface()) {
1364 Klass* super_klass = super();
1365 if (super_klass != nullptr && super_klass->should_be_initialized()) {
1366 super_klass->initialize(THREAD);
1367 }
1368 // If C implements any interface that declares a non-static, concrete method,
1369 // the initialization of C triggers initialization of its super interfaces.
1370 // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1371 // having a superinterface that declares, non-static, concrete methods
1372 if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1373 initialize_super_interfaces(THREAD);
1374 }
1375
1376 // If any exceptions, complete abruptly, throwing the same exception as above.
1377 if (HAS_PENDING_EXCEPTION) {
1378 Handle e(THREAD, PENDING_EXCEPTION);
1379 CLEAR_PENDING_EXCEPTION;
1380 {
1381 EXCEPTION_MARK;
1382 add_initialization_error(THREAD, e);
1383 // Locks object, set state, and notify all waiting threads
1384 set_initialization_state_and_notify(initialization_error, THREAD);
1385 CLEAR_PENDING_EXCEPTION;
1386 }
1387 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1388 THROW_OOP(e());
1389 }
1390 }
1391
1392 // Step 8
1393 // Initialize classes of inline fields
1394 if (EnableValhalla) {
1395 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1396 if (fs.is_null_free_inline_type()) {
1397
1398 // inline type field klass array entries must have alreadyt been filed at load time or link time
1399 Klass* klass = get_inline_type_field_klass(fs.index());
1400
1401 InstanceKlass::cast(klass)->initialize(THREAD);
1402 if (fs.access_flags().is_static()) {
1403 if (java_mirror()->obj_field(fs.offset()) == nullptr) {
1404 java_mirror()->obj_field_put(fs.offset(), InlineKlass::cast(klass)->default_value());
1405 }
1406 }
1407
1408 if (HAS_PENDING_EXCEPTION) {
1409 Handle e(THREAD, PENDING_EXCEPTION);
1410 CLEAR_PENDING_EXCEPTION;
1411 {
1412 EXCEPTION_MARK;
1413 add_initialization_error(THREAD, e);
1414 // Locks object, set state, and notify all waiting threads
1415 set_initialization_state_and_notify(initialization_error, THREAD);
1416 CLEAR_PENDING_EXCEPTION;
1417 }
1418 THROW_OOP(e());
1419 }
1420 }
1421 }
1422 }
1423
1424
1425 // Step 9
1426 {
1427 DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1428 if (class_initializer() != nullptr) {
1429 // Timer includes any side effects of class initialization (resolution,
1430 // etc), but not recursive entry into call_class_initializer().
1431 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1432 ClassLoader::perf_class_init_selftime(),
1433 ClassLoader::perf_classes_inited(),
1434 jt->get_thread_stat()->perf_recursion_counts_addr(),
1435 jt->get_thread_stat()->perf_timers_addr(),
1436 PerfClassTraceTime::CLASS_CLINIT);
1437 call_class_initializer(THREAD);
1438 } else {
1439 // The elapsed time is so small it's not worth counting.
1440 if (UsePerfData) {
1441 ClassLoader::perf_classes_inited()->inc();
1442 }
1443 call_class_initializer(THREAD);
1444 }
1445 }
1446
1447 // Step 10
1448 if (!HAS_PENDING_EXCEPTION) {
1449 set_initialization_state_and_notify(fully_initialized, THREAD);
1450 debug_only(vtable().verify(tty, true);)
1451 }
1452 else {
1453 // Step 11 and 12
1454 Handle e(THREAD, PENDING_EXCEPTION);
1455 CLEAR_PENDING_EXCEPTION;
1456 // JVMTI has already reported the pending exception
1457 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1458 JvmtiExport::clear_detected_exception(jt);
1459 {
1460 EXCEPTION_MARK;
1461 add_initialization_error(THREAD, e);
1462 set_initialization_state_and_notify(initialization_error, THREAD);
1463 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
1464 // JVMTI has already reported the pending exception
1465 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1466 JvmtiExport::clear_detected_exception(jt);
1467 }
1468 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1469 if (e->is_a(vmClasses::Error_klass())) {
1470 THROW_OOP(e());
1471 } else {
1472 JavaCallArguments args(e);
1473 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1759 : vmSymbols::java_lang_InstantiationException(), external_name());
1760 }
1761 if (this == vmClasses::Class_klass()) {
1762 ResourceMark rm(THREAD);
1763 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1764 : vmSymbols::java_lang_IllegalAccessException(), external_name());
1765 }
1766 }
1767
1768 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1769 // Need load-acquire for lock-free read
1770 if (array_klasses_acquire() == nullptr) {
1771 ResourceMark rm(THREAD);
1772 JavaThread *jt = THREAD;
1773 {
1774 // Atomic creation of array_klasses
1775 MutexLocker ma(THREAD, MultiArray_lock);
1776
1777 // Check if update has already taken place
1778 if (array_klasses() == nullptr) {
1779 ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this,
1780 false, CHECK_NULL);
1781 // use 'release' to pair with lock-free load
1782 release_set_array_klasses(k);
1783 }
1784 }
1785 }
1786 // array_klasses() will always be set at this point
1787 ArrayKlass* ak = array_klasses();
1788 return ak->array_klass(n, THREAD);
1789 }
1790
1791 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1792 // Need load-acquire for lock-free read
1793 ArrayKlass* ak = array_klasses_acquire();
1794 if (ak == nullptr) {
1795 return nullptr;
1796 } else {
1797 return ak->array_klass_or_null(n);
1798 }
1799 }
1800
1801 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1802 return array_klass(1, THREAD);
1803 }
1804
1805 ArrayKlass* InstanceKlass::array_klass_or_null() {
1806 return array_klass_or_null(1);
1807 }
1808
1809 static int call_class_initializer_counter = 0; // for debugging
1810
1811 Method* InstanceKlass::class_initializer() const {
1812 Method* clinit = find_method(
1813 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1814 if (clinit != nullptr && clinit->is_class_initializer()) {
1815 return clinit;
1816 }
1817 return nullptr;
1818 }
1819
1820 void InstanceKlass::call_class_initializer(TRAPS) {
1821 if (ReplayCompiles &&
1822 (ReplaySuppressInitializers == 1 ||
1823 (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1824 // Hide the existence of the initializer for the purpose of replaying the compile
1825 return;
1826 }
1827
1828 #if INCLUDE_CDS
1829 // This is needed to ensure the consistency of the archived heap objects.
1830 if (has_archived_enum_objs()) {
1831 assert(is_shared(), "must be");
1832 bool initialized = HeapShared::initialize_enum_klass(this, CHECK);
1833 if (initialized) {
1834 return;
1845 ls.print("%d Initializing ", call_class_initializer_counter++);
1846 name()->print_value_on(&ls);
1847 ls.print_cr("%s (" PTR_FORMAT ") by thread \"%s\"",
1848 h_method() == nullptr ? "(no method)" : "", p2i(this),
1849 THREAD->name());
1850 }
1851 if (h_method() != nullptr) {
1852 JavaCallArguments args; // No arguments
1853 JavaValue result(T_VOID);
1854 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
1855 }
1856 }
1857
1858
1859 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1860 InterpreterOopMap* entry_for) {
1861 // Lazily create the _oop_map_cache at first request
1862 // Lock-free access requires load_acquire.
1863 OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1864 if (oop_map_cache == nullptr) {
1865 MutexLocker x(OopMapCacheAlloc_lock, Mutex::_no_safepoint_check_flag);
1866 // Check if _oop_map_cache was allocated while we were waiting for this lock
1867 if ((oop_map_cache = _oop_map_cache) == nullptr) {
1868 oop_map_cache = new OopMapCache();
1869 // Ensure _oop_map_cache is stable, since it is examined without a lock
1870 Atomic::release_store(&_oop_map_cache, oop_map_cache);
1871 }
1872 }
1873 // _oop_map_cache is constant after init; lookup below does its own locking.
1874 oop_map_cache->lookup(method, bci, entry_for);
1875 }
1876
1877
1878 FieldInfo InstanceKlass::field(int index) const {
1879 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1880 if (fs.index() == index) {
1881 return fs.to_FieldInfo();
1882 }
1883 }
1884 fatal("Field not found");
1885 return FieldInfo();
1886 }
1887
1888 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1889 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1890 Symbol* f_name = fs.name();
1891 Symbol* f_sig = fs.signature();
1892 if (f_name == name && f_sig == sig) {
1893 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1894 return true;
1895 }
1896 }
1938
1939 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1940 // search order according to newest JVM spec (5.4.3.2, p.167).
1941 // 1) search for field in current klass
1942 if (find_local_field(name, sig, fd)) {
1943 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1944 }
1945 // 2) search for field recursively in direct superinterfaces
1946 if (is_static) {
1947 Klass* intf = find_interface_field(name, sig, fd);
1948 if (intf != nullptr) return intf;
1949 }
1950 // 3) apply field lookup recursively if superclass exists
1951 { Klass* supr = super();
1952 if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1953 }
1954 // 4) otherwise field lookup fails
1955 return nullptr;
1956 }
1957
1958 bool InstanceKlass::contains_field_offset(int offset) {
1959 if (this->is_inline_klass()) {
1960 InlineKlass* vk = InlineKlass::cast(this);
1961 return offset >= vk->first_field_offset() && offset < (vk->first_field_offset() + vk->get_payload_size_in_bytes());
1962 } else {
1963 fieldDescriptor fd;
1964 return find_field_from_offset(offset, false, &fd);
1965 }
1966 }
1967
1968 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1969 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1970 if (fs.offset() == offset) {
1971 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1972 if (fd->is_static() == is_static) return true;
1973 }
1974 }
1975 return false;
1976 }
1977
1978
1979 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1980 Klass* klass = const_cast<InstanceKlass*>(this);
1981 while (klass != nullptr) {
1982 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1983 return true;
1984 }
1985 klass = klass->super();
1986 }
2338 }
2339
2340 // uncached_lookup_method searches both the local class methods array and all
2341 // superclasses methods arrays, skipping any overpass methods in superclasses,
2342 // and possibly skipping private methods.
2343 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2344 const Symbol* signature,
2345 OverpassLookupMode overpass_mode,
2346 PrivateLookupMode private_mode) const {
2347 OverpassLookupMode overpass_local_mode = overpass_mode;
2348 const Klass* klass = this;
2349 while (klass != nullptr) {
2350 Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2351 signature,
2352 overpass_local_mode,
2353 StaticLookupMode::find,
2354 private_mode);
2355 if (method != nullptr) {
2356 return method;
2357 }
2358 if (name == vmSymbols::object_initializer_name()) {
2359 break; // <init> is never inherited
2360 }
2361 klass = klass->super();
2362 overpass_local_mode = OverpassLookupMode::skip; // Always ignore overpass methods in superclasses
2363 }
2364 return nullptr;
2365 }
2366
2367 #ifdef ASSERT
2368 // search through class hierarchy and return true if this class or
2369 // one of the superclasses was redefined
2370 bool InstanceKlass::has_redefined_this_or_super() const {
2371 const Klass* klass = this;
2372 while (klass != nullptr) {
2373 if (InstanceKlass::cast(klass)->has_been_redefined()) {
2374 return true;
2375 }
2376 klass = klass->super();
2377 }
2378 return false;
2379 }
2380 #endif
2821 int method_table_offset_in_words = ioe->offset()/wordSize;
2822 int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2823
2824 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2825 / itableOffsetEntry::size();
2826
2827 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2828 if (ioe->interface_klass() != nullptr) {
2829 it->push(ioe->interface_klass_addr());
2830 itableMethodEntry* ime = ioe->first_method_entry(this);
2831 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2832 for (int index = 0; index < n; index ++) {
2833 it->push(ime[index].method_addr());
2834 }
2835 }
2836 }
2837 }
2838
2839 it->push(&_nest_members);
2840 it->push(&_permitted_subclasses);
2841 it->push(&_loadable_descriptors);
2842 it->push(&_record_components);
2843
2844 it->push(&_inline_type_field_klasses, MetaspaceClosure::_writable);
2845 it->push(&_null_marker_offsets);
2846 }
2847
2848 #if INCLUDE_CDS
2849 void InstanceKlass::remove_unshareable_info() {
2850
2851 if (is_linked()) {
2852 assert(can_be_verified_at_dumptime(), "must be");
2853 // Remember this so we can avoid walking the hierarchy at runtime.
2854 set_verified_at_dump_time();
2855 }
2856
2857 Klass::remove_unshareable_info();
2858
2859 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2860 // Classes are attempted to link during dumping and may fail,
2861 // but these classes are still in the dictionary and class list in CLD.
2862 // If the class has failed verification, there is nothing else to remove.
2863 return;
2864 }
2865
2869 // being added to class hierarchy (see InstanceKlass:::add_to_hierarchy()).
2870 _init_state = allocated;
2871
2872 { // Otherwise this needs to take out the Compile_lock.
2873 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2874 init_implementor();
2875 }
2876
2877 constants()->remove_unshareable_info();
2878
2879 for (int i = 0; i < methods()->length(); i++) {
2880 Method* m = methods()->at(i);
2881 m->remove_unshareable_info();
2882 }
2883
2884 // do array classes also.
2885 if (array_klasses() != nullptr) {
2886 array_klasses()->remove_unshareable_info();
2887 }
2888
2889 // These are not allocated from metaspace. They are safe to set to nullptr.
2890 _source_debug_extension = nullptr;
2891 _dep_context = nullptr;
2892 _osr_nmethods_head = nullptr;
2893 #if INCLUDE_JVMTI
2894 _breakpoints = nullptr;
2895 _previous_versions = nullptr;
2896 _cached_class_file = nullptr;
2897 _jvmti_cached_class_field_map = nullptr;
2898 #endif
2899
2900 _init_thread = nullptr;
2901 _methods_jmethod_ids = nullptr;
2902 _jni_ids = nullptr;
2903 _oop_map_cache = nullptr;
2904 // clear _nest_host to ensure re-load at runtime
2905 _nest_host = nullptr;
2906 init_shared_package_entry();
2907 _dep_context_last_cleaned = 0;
2908 _init_monitor = nullptr;
2909
2954 void InstanceKlass::compute_has_loops_flag_for_methods() {
2955 Array<Method*>* methods = this->methods();
2956 for (int index = 0; index < methods->length(); ++index) {
2957 Method* m = methods->at(index);
2958 if (!m->is_overpass()) { // work around JDK-8305771
2959 m->compute_has_loops_flag();
2960 }
2961 }
2962 }
2963
2964 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2965 PackageEntry* pkg_entry, TRAPS) {
2966 // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
2967 // before the InstanceKlass is added to the SystemDictionary. Make
2968 // sure the current state is <loaded.
2969 assert(!is_loaded(), "invalid init state");
2970 assert(!shared_loading_failed(), "Must not try to load failed class again");
2971 set_package(loader_data, pkg_entry, CHECK);
2972 Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2973
2974 if (is_inline_klass()) {
2975 InlineKlass::cast(this)->initialize_calling_convention(CHECK);
2976 }
2977
2978 Array<Method*>* methods = this->methods();
2979 int num_methods = methods->length();
2980 for (int index = 0; index < num_methods; ++index) {
2981 methods->at(index)->restore_unshareable_info(CHECK);
2982 }
2983 #if INCLUDE_JVMTI
2984 if (JvmtiExport::has_redefined_a_class()) {
2985 // Reinitialize vtable because RedefineClasses may have changed some
2986 // entries in this vtable for super classes so the CDS vtable might
2987 // point to old or obsolete entries. RedefineClasses doesn't fix up
2988 // vtables in the shared system dictionary, only the main one.
2989 // It also redefines the itable too so fix that too.
2990 // First fix any default methods that point to a super class that may
2991 // have been redefined.
2992 bool trace_name_printed = false;
2993 adjust_default_methods(&trace_name_printed);
2994 vtable().initialize_vtable();
2995 itable().initialize_itable();
2996 }
2997 #endif
2998
2999 // restore constant pool resolved references
3000 constants()->restore_unshareable_info(CHECK);
3001
3002 if (array_klasses() != nullptr) {
3003 // To get a consistent list of classes we need MultiArray_lock to ensure
3004 // array classes aren't observed while they are being restored.
3005 MutexLocker ml(MultiArray_lock);
3006 assert(this == ObjArrayKlass::cast(array_klasses())->bottom_klass(), "sanity");
3007 // Array classes have null protection domain.
3008 // --> see ArrayKlass::complete_create_array_klass()
3009 array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
3010 }
3011
3012 // Initialize @ValueBased class annotation
3013 if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation()) {
3014 set_is_value_based();
3015 }
3016
3017 // restore the monitor
3018 _init_monitor = create_init_monitor("InstanceKlassInitMonitorRestored_lock");
3019 }
3020
3021 // Check if a class or any of its supertypes has a version older than 50.
3022 // CDS will not perform verification of old classes during dump time because
3023 // without changing the old verifier, the verification constraint cannot be
3024 // retrieved during dump time.
3025 // Verification of archived old classes will be performed during run time.
3026 bool InstanceKlass::can_be_verified_at_dumptime() const {
3185 } else {
3186 // Adding one to the attribute length in order to store a null terminator
3187 // character could cause an overflow because the attribute length is
3188 // already coded with an u4 in the classfile, but in practice, it's
3189 // unlikely to happen.
3190 assert((length+1) > length, "Overflow checking");
3191 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
3192 for (int i = 0; i < length; i++) {
3193 sde[i] = array[i];
3194 }
3195 sde[length] = '\0';
3196 _source_debug_extension = sde;
3197 }
3198 }
3199
3200 Symbol* InstanceKlass::generic_signature() const { return _constants->generic_signature(); }
3201 u2 InstanceKlass::generic_signature_index() const { return _constants->generic_signature_index(); }
3202 void InstanceKlass::set_generic_signature_index(u2 sig_index) { _constants->set_generic_signature_index(sig_index); }
3203
3204 const char* InstanceKlass::signature_name() const {
3205 return signature_name_of_carrier(JVM_SIGNATURE_CLASS);
3206 }
3207
3208 const char* InstanceKlass::signature_name_of_carrier(char c) const {
3209 // Get the internal name as a c string
3210 const char* src = (const char*) (name()->as_C_string());
3211 const int src_length = (int)strlen(src);
3212
3213 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
3214
3215 // Add L or Q as type indicator
3216 int dest_index = 0;
3217 dest[dest_index++] = c;
3218
3219 // Add the actual class name
3220 for (int src_index = 0; src_index < src_length; ) {
3221 dest[dest_index++] = src[src_index++];
3222 }
3223
3224 if (is_hidden()) { // Replace the last '+' with a '.'.
3225 for (int index = (int)src_length; index > 0; index--) {
3226 if (dest[index] == '+') {
3227 dest[index] = JVM_SIGNATURE_DOT;
3228 break;
3229 }
3230 }
3231 }
3232
3233 // Add the semicolon and the null
3234 dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
3235 dest[dest_index] = '\0';
3236 return dest;
3237 }
3539 jint InstanceKlass::compute_modifier_flags() const {
3540 jint access = access_flags().as_int();
3541
3542 // But check if it happens to be member class.
3543 InnerClassesIterator iter(this);
3544 for (; !iter.done(); iter.next()) {
3545 int ioff = iter.inner_class_info_index();
3546 // Inner class attribute can be zero, skip it.
3547 // Strange but true: JVM spec. allows null inner class refs.
3548 if (ioff == 0) continue;
3549
3550 // only look at classes that are already loaded
3551 // since we are looking for the flags for our self.
3552 Symbol* inner_name = constants()->klass_name_at(ioff);
3553 if (name() == inner_name) {
3554 // This is really a member class.
3555 access = iter.inner_access_flags();
3556 break;
3557 }
3558 }
3559 return (access & JVM_ACC_WRITTEN_FLAGS);
3560 }
3561
3562 jint InstanceKlass::jvmti_class_status() const {
3563 jint result = 0;
3564
3565 if (is_linked()) {
3566 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3567 }
3568
3569 if (is_initialized()) {
3570 assert(is_linked(), "Class status is not consistent");
3571 result |= JVMTI_CLASS_STATUS_INITIALIZED;
3572 }
3573 if (is_in_error_state()) {
3574 result |= JVMTI_CLASS_STATUS_ERROR;
3575 }
3576 return result;
3577 }
3578
3579 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {
3793 }
3794 osr = osr->osr_link();
3795 }
3796
3797 assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3798 if (best != nullptr && best->comp_level() >= comp_level) {
3799 return best;
3800 }
3801 return nullptr;
3802 }
3803
3804 // -----------------------------------------------------------------------------------------------------
3805 // Printing
3806
3807 #define BULLET " - "
3808
3809 static const char* state_names[] = {
3810 "allocated", "loaded", "being_linked", "linked", "being_initialized", "fully_initialized", "initialization_error"
3811 };
3812
3813 static void print_vtable(address self, intptr_t* start, int len, outputStream* st) {
3814 ResourceMark rm;
3815 int* forward_refs = NEW_RESOURCE_ARRAY(int, len);
3816 for (int i = 0; i < len; i++) forward_refs[i] = 0;
3817 for (int i = 0; i < len; i++) {
3818 intptr_t e = start[i];
3819 st->print("%d : " INTPTR_FORMAT, i, e);
3820 if (forward_refs[i] != 0) {
3821 int from = forward_refs[i];
3822 int off = (int) start[from];
3823 st->print(" (offset %d <= [%d])", off, from);
3824 }
3825 if (MetaspaceObj::is_valid((Metadata*)e)) {
3826 st->print(" ");
3827 ((Metadata*)e)->print_value_on(st);
3828 } else if (self != nullptr && e > 0 && e < 0x10000) {
3829 address location = self + e;
3830 int index = (int)((intptr_t*)location - start);
3831 st->print(" (offset %d => [%d])", (int)e, index);
3832 if (index >= 0 && index < len)
3833 forward_refs[index] = i;
3834 }
3835 st->cr();
3836 }
3837 }
3838
3839 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3840 return print_vtable(nullptr, reinterpret_cast<intptr_t*>(start), len, st);
3841 }
3842
3843 template<typename T>
3844 static void print_array_on(outputStream* st, Array<T>* array) {
3845 if (array == nullptr) { st->print_cr("nullptr"); return; }
3846 array->print_value_on(st); st->cr();
3847 if (Verbose || WizardMode) {
3848 for (int i = 0; i < array->length(); i++) {
3849 st->print("%d : ", i); array->at(i)->print_value_on(st); st->cr();
3850 }
3851 }
3852 }
3853
3854 static void print_array_on(outputStream* st, Array<int>* array) {
3855 if (array == nullptr) { st->print_cr("nullptr"); return; }
3856 array->print_value_on(st); st->cr();
3857 if (Verbose || WizardMode) {
3858 for (int i = 0; i < array->length(); i++) {
3859 st->print("%d : %d", i, array->at(i)); st->cr();
3860 }
3861 }
3862 }
3863
3864 const char* InstanceKlass::init_state_name() const {
3865 return state_names[init_state()];
3866 }
3867
3868 void InstanceKlass::print_on(outputStream* st) const {
3869 assert(is_klass(), "must be klass");
3870 Klass::print_on(st);
3871
3872 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3873 st->print(BULLET"klass size: %d", size()); st->cr();
3874 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3875 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3876 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3877 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3878 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3879 st->print(BULLET"sub: ");
3880 Klass* sub = subklass();
3881 int n;
3882 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3883 if (n < MaxSubklassPrintSize) {
3884 sub->print_value_on(st);
3885 st->print(" ");
3886 }
3887 }
3888 if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3889 st->cr();
3890
3891 if (is_interface()) {
3892 st->print_cr(BULLET"nof implementors: %d", nof_implementors());
3893 if (nof_implementors() == 1) {
3894 st->print_cr(BULLET"implementor: ");
3895 st->print(" ");
3896 implementor()->print_value_on(st);
3897 st->cr();
3898 }
3899 }
3900
3901 st->print(BULLET"arrays: "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3902 st->print(BULLET"methods: "); print_array_on(st, methods());
3903 st->print(BULLET"method ordering: "); print_array_on(st, method_ordering());
3904 st->print(BULLET"default_methods: "); print_array_on(st, default_methods());
3905 if (default_vtable_indices() != nullptr) {
3906 st->print(BULLET"default vtable indices: "); print_array_on(st, default_vtable_indices());
3907 }
3908 st->print(BULLET"local interfaces: "); print_array_on(st, local_interfaces());
3909 st->print(BULLET"trans. interfaces: "); print_array_on(st, transitive_interfaces());
3910 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr();
3911 if (class_loader_data() != nullptr) {
3912 st->print(BULLET"class loader data: ");
3913 class_loader_data()->print_value_on(st);
3914 st->cr();
3915 }
3916 if (source_file_name() != nullptr) {
3917 st->print(BULLET"source file: ");
3918 source_file_name()->print_value_on(st);
3919 st->cr();
3920 }
3921 if (source_debug_extension() != nullptr) {
3922 st->print(BULLET"source debug extension: ");
3923 st->print("%s", source_debug_extension());
3924 st->cr();
3925 }
3926 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr();
3927 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr();
3928 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr();
3929 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr();
3935 pv_node = pv_node->previous_versions()) {
3936 if (!have_pv)
3937 st->print(BULLET"previous version: ");
3938 have_pv = true;
3939 pv_node->constants()->print_value_on(st);
3940 }
3941 if (have_pv) st->cr();
3942 }
3943
3944 if (generic_signature() != nullptr) {
3945 st->print(BULLET"generic signature: ");
3946 generic_signature()->print_value_on(st);
3947 st->cr();
3948 }
3949 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr();
3950 st->print(BULLET"nest members: "); nest_members()->print_value_on(st); st->cr();
3951 if (record_components() != nullptr) {
3952 st->print(BULLET"record components: "); record_components()->print_value_on(st); st->cr();
3953 }
3954 st->print(BULLET"permitted subclasses: "); permitted_subclasses()->print_value_on(st); st->cr();
3955 st->print(BULLET"loadable descriptors: "); loadable_descriptors()->print_value_on(st); st->cr();
3956 if (java_mirror() != nullptr) {
3957 st->print(BULLET"java mirror: ");
3958 java_mirror()->print_value_on(st);
3959 st->cr();
3960 } else {
3961 st->print_cr(BULLET"java mirror: null");
3962 }
3963 st->print(BULLET"vtable length %d (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3964 if (vtable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_vtable(), vtable_length(), st);
3965 st->print(BULLET"itable length %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3966 if (itable_length() > 0 && (Verbose || WizardMode)) print_vtable(nullptr, start_of_itable(), itable_length(), st);
3967 st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3968 FieldPrinter print_static_field(st);
3969 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3970 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3971 FieldPrinter print_nonstatic_field(st);
3972 InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3973 ik->print_nonstatic_fields(&print_nonstatic_field);
3974
3975 st->print(BULLET"non-static oop maps: ");
3976 OopMapBlock* map = start_of_nonstatic_oop_maps();
3977 OopMapBlock* end_map = map + nonstatic_oop_map_count();
3978 while (map < end_map) {
3979 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3980 map++;
3981 }
3982 st->cr();
3983 }
3984
3985 void InstanceKlass::print_value_on(outputStream* st) const {
3986 assert(is_klass(), "must be klass");
|