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"
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
424 log_trace(class, nestmates)("Class %s does %shave nestmate access to %s",
425 this->external_name(),
426 access ? "" : "NOT ",
427 k->external_name());
428 return access;
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 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
441 const int size = InstanceKlass::size(parser.vtable_size(),
442 parser.itable_size(),
443 nonstatic_oop_map_size(parser.total_oop_map_count()),
444 parser.is_interface());
445
446 const Symbol* const class_name = parser.class_name();
447 assert(class_name != nullptr, "invariant");
448 ClassLoaderData* loader_data = parser.loader_data();
449 assert(loader_data != nullptr, "invariant");
450
451 InstanceKlass* ik;
452
453 // Allocation
454 if (parser.is_instance_ref_klass()) {
455 // java.lang.ref.Reference
456 ik = new (loader_data, size, THREAD) InstanceRefKlass(parser);
457 } else if (class_name == vmSymbols::java_lang_Class()) {
458 // mirror - java.lang.Class
459 ik = new (loader_data, size, THREAD) InstanceMirrorKlass(parser);
460 } else if (is_stack_chunk_class(class_name, loader_data)) {
461 // stack chunk
462 ik = new (loader_data, size, THREAD) InstanceStackChunkKlass(parser);
463 } else if (is_class_loader(class_name, parser)) {
464 // class loader - java.lang.ClassLoader
465 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass(parser);
466 } else {
467 // normal
468 ik = new (loader_data, size, THREAD) InstanceKlass(parser);
469 }
470
471 // Check for pending exception before adding to the loader data and incrementing
472 // class count. Can get OOM here.
473 if (HAS_PENDING_EXCEPTION) {
474 return nullptr;
475 }
476
477 return ik;
478 }
479
480
481 // copy method ordering from resource area to Metaspace
482 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
483 if (m != nullptr) {
484 // allocate a new array and copy contents (memcpy?)
485 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
486 for (int i = 0; i < m->length(); i++) {
487 _method_ordering->at_put(i, m->at(i));
488 }
489 } else {
490 _method_ordering = Universe::the_empty_int_array();
491 }
492 }
493
494 // create a new array of vtable_indices for default methods
495 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
496 Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
497 assert(default_vtable_indices() == nullptr, "only create once");
498 set_default_vtable_indices(vtable_indices);
499 return vtable_indices;
500 }
501
502
503 InstanceKlass::InstanceKlass() {
504 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
505 }
506
507 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
508 Klass(kind),
509 _nest_members(nullptr),
510 _nest_host(nullptr),
511 _permitted_subclasses(nullptr),
512 _record_components(nullptr),
513 _static_field_size(parser.static_field_size()),
514 _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
515 _itable_len(parser.itable_size()),
516 _nest_host_index(0),
517 _init_state(allocated),
518 _reference_type(reference_type),
519 _init_thread(nullptr)
520 {
521 set_vtable_length(parser.vtable_size());
522 set_access_flags(parser.access_flags());
523 if (parser.is_hidden()) set_is_hidden();
524 set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
525 false));
526
527 assert(nullptr == _methods, "underlying memory not zeroed?");
528 assert(is_instance_klass(), "is layout incorrect?");
529 assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
530 }
531
532 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
533 Array<Method*>* methods) {
534 if (methods != nullptr && methods != Universe::the_empty_method_array() &&
535 !methods->is_shared()) {
536 for (int i = 0; i < methods->length(); i++) {
537 Method* method = methods->at(i);
538 if (method == nullptr) continue; // maybe null if error processing
539 // Only want to delete methods that are not executing for RedefineClasses.
540 // The previous version will point to them so they're not totally dangling
541 assert (!method->on_stack(), "shouldn't be called with methods on stack");
542 MetadataFactory::free_metadata(loader_data, method);
543 }
544 MetadataFactory::free_array<Method*>(loader_data, methods);
545 }
645 (address)(secondary_supers()) != (address)(transitive_interfaces()) &&
646 !secondary_supers()->is_shared()) {
647 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers());
648 }
649 set_secondary_supers(nullptr);
650
651 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
652 set_transitive_interfaces(nullptr);
653 set_local_interfaces(nullptr);
654
655 if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
656 MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
657 }
658 set_fieldinfo_stream(nullptr);
659
660 if (fields_status() != nullptr && !fields_status()->is_shared()) {
661 MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
662 }
663 set_fields_status(nullptr);
664
665 // If a method from a redefined class is using this constant pool, don't
666 // delete it, yet. The new class's previous version will point to this.
667 if (constants() != nullptr) {
668 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
669 if (!constants()->is_shared()) {
670 MetadataFactory::free_metadata(loader_data, constants());
671 }
672 // Delete any cached resolution errors for the constant pool
673 SystemDictionary::delete_resolution_error(constants());
674
675 set_constants(nullptr);
676 }
677
678 if (inner_classes() != nullptr &&
679 inner_classes() != Universe::the_empty_short_array() &&
680 !inner_classes()->is_shared()) {
681 MetadataFactory::free_array<jushort>(loader_data, inner_classes());
682 }
683 set_inner_classes(nullptr);
684
685 if (nest_members() != nullptr &&
686 nest_members() != Universe::the_empty_short_array() &&
687 !nest_members()->is_shared()) {
688 MetadataFactory::free_array<jushort>(loader_data, nest_members());
689 }
690 set_nest_members(nullptr);
691
692 if (permitted_subclasses() != nullptr &&
693 permitted_subclasses() != Universe::the_empty_short_array() &&
694 !permitted_subclasses()->is_shared()) {
695 MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
696 }
697 set_permitted_subclasses(nullptr);
698
699 // We should deallocate the Annotations instance if it's not in shared spaces.
700 if (annotations() != nullptr && !annotations()->is_shared()) {
701 MetadataFactory::free_metadata(loader_data, annotations());
702 }
703 set_annotations(nullptr);
704
705 SystemDictionaryShared::handle_class_unloading(this);
706
707 #if INCLUDE_CDS_JAVA_HEAP
708 if (CDSConfig::is_dumping_heap()) {
709 HeapShared::remove_scratch_objects(this);
710 }
711 #endif
712 }
713
714 bool InstanceKlass::is_record() const {
715 return _record_components != nullptr &&
716 is_final() &&
717 java_super() == vmClasses::Record_klass();
718 }
837 vmSymbols::java_lang_IncompatibleClassChangeError(),
838 "class %s has interface %s as super class",
839 external_name(),
840 super_klass->external_name()
841 );
842 return false;
843 }
844
845 InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
846 ik_super->link_class_impl(CHECK_false);
847 }
848
849 // link all interfaces implemented by this class before linking this class
850 Array<InstanceKlass*>* interfaces = local_interfaces();
851 int num_interfaces = interfaces->length();
852 for (int index = 0; index < num_interfaces; index++) {
853 InstanceKlass* interk = interfaces->at(index);
854 interk->link_class_impl(CHECK_false);
855 }
856
857 // in case the class is linked in the process of linking its superclasses
858 if (is_linked()) {
859 return true;
860 }
861
862 // trace only the link time for this klass that includes
863 // the verification time
864 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
865 ClassLoader::perf_class_link_selftime(),
866 ClassLoader::perf_classes_linked(),
867 jt->get_thread_stat()->perf_recursion_counts_addr(),
868 jt->get_thread_stat()->perf_timers_addr(),
869 PerfClassTraceTime::CLASS_LINK);
870
871 // verification & rewriting
872 {
873 HandleMark hm(THREAD);
874 Handle h_init_lock(THREAD, init_lock());
875 ObjectLocker ol(h_init_lock, jt);
876 // rewritten will have been set if loader constraint error found
1141 ss.print("Could not initialize class %s", external_name());
1142 if (cause.is_null()) {
1143 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1144 } else {
1145 THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1146 ss.as_string(), cause);
1147 }
1148 } else {
1149
1150 // Step 6
1151 set_init_state(being_initialized);
1152 set_init_thread(jt);
1153 if (debug_logging_enabled) {
1154 ResourceMark rm(jt);
1155 log_debug(class, init)("Thread \"%s\" is initializing %s",
1156 jt->name(), external_name());
1157 }
1158 }
1159 }
1160
1161 // Step 7
1162 // Next, if C is a class rather than an interface, initialize it's super class and super
1163 // interfaces.
1164 if (!is_interface()) {
1165 Klass* super_klass = super();
1166 if (super_klass != nullptr && super_klass->should_be_initialized()) {
1167 super_klass->initialize(THREAD);
1168 }
1169 // If C implements any interface that declares a non-static, concrete method,
1170 // the initialization of C triggers initialization of its super interfaces.
1171 // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1172 // having a superinterface that declares, non-static, concrete methods
1173 if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1174 initialize_super_interfaces(THREAD);
1175 }
1176
1177 // If any exceptions, complete abruptly, throwing the same exception as above.
1178 if (HAS_PENDING_EXCEPTION) {
1179 Handle e(THREAD, PENDING_EXCEPTION);
1180 CLEAR_PENDING_EXCEPTION;
1181 {
1182 EXCEPTION_MARK;
1183 add_initialization_error(THREAD, e);
1184 // Locks object, set state, and notify all waiting threads
1185 set_initialization_state_and_notify(initialization_error, THREAD);
1186 CLEAR_PENDING_EXCEPTION;
1187 }
1188 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1189 THROW_OOP(e());
1190 }
1191 }
1192
1193
1194 // Step 8
1195 {
1196 DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1197 if (class_initializer() != nullptr) {
1198 // Timer includes any side effects of class initialization (resolution,
1199 // etc), but not recursive entry into call_class_initializer().
1200 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1201 ClassLoader::perf_class_init_selftime(),
1202 ClassLoader::perf_classes_inited(),
1203 jt->get_thread_stat()->perf_recursion_counts_addr(),
1204 jt->get_thread_stat()->perf_timers_addr(),
1205 PerfClassTraceTime::CLASS_CLINIT);
1206 call_class_initializer(THREAD);
1207 } else {
1208 // The elapsed time is so small it's not worth counting.
1209 if (UsePerfData) {
1210 ClassLoader::perf_classes_inited()->inc();
1211 }
1212 call_class_initializer(THREAD);
1213 }
1214 }
1215
1216 // Step 9
1217 if (!HAS_PENDING_EXCEPTION) {
1218 set_initialization_state_and_notify(fully_initialized, CHECK);
1219 debug_only(vtable().verify(tty, true);)
1220 }
1221 else {
1222 // Step 10 and 11
1223 Handle e(THREAD, PENDING_EXCEPTION);
1224 CLEAR_PENDING_EXCEPTION;
1225 // JVMTI has already reported the pending exception
1226 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1227 JvmtiExport::clear_detected_exception(jt);
1228 {
1229 EXCEPTION_MARK;
1230 add_initialization_error(THREAD, e);
1231 set_initialization_state_and_notify(initialization_error, THREAD);
1232 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
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 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1238 if (e->is_a(vmClasses::Error_klass())) {
1239 THROW_OOP(e());
1240 } else {
1241 JavaCallArguments args(e);
1242 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1507 ResourceMark rm(THREAD);
1508 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
1509 : vmSymbols::java_lang_InstantiationException(), external_name());
1510 }
1511 if (this == vmClasses::Class_klass()) {
1512 ResourceMark rm(THREAD);
1513 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1514 : vmSymbols::java_lang_IllegalAccessException(), external_name());
1515 }
1516 }
1517
1518 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1519 // Need load-acquire for lock-free read
1520 if (array_klasses_acquire() == nullptr) {
1521
1522 // Recursively lock array allocation
1523 RecursiveLocker rl(MultiArray_lock, THREAD);
1524
1525 // Check if another thread created the array klass while we were waiting for the lock.
1526 if (array_klasses() == nullptr) {
1527 ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, CHECK_NULL);
1528 // use 'release' to pair with lock-free load
1529 release_set_array_klasses(k);
1530 }
1531 }
1532
1533 // array_klasses() will always be set at this point
1534 ObjArrayKlass* ak = array_klasses();
1535 assert(ak != nullptr, "should be set");
1536 return ak->array_klass(n, THREAD);
1537 }
1538
1539 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1540 // Need load-acquire for lock-free read
1541 ObjArrayKlass* oak = array_klasses_acquire();
1542 if (oak == nullptr) {
1543 return nullptr;
1544 } else {
1545 return oak->array_klass_or_null(n);
1546 }
1547 }
1548
1549 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1550 return array_klass(1, THREAD);
1551 }
1552
1553 ArrayKlass* InstanceKlass::array_klass_or_null() {
1554 return array_klass_or_null(1);
1555 }
1556
1557 static int call_class_initializer_counter = 0; // for debugging
1558
1559 Method* InstanceKlass::class_initializer() const {
1560 Method* clinit = find_method(
1561 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1562 if (clinit != nullptr && clinit->has_valid_initializer_flags()) {
1563 return clinit;
1564 }
1565 return nullptr;
1566 }
1567
1568 void InstanceKlass::call_class_initializer(TRAPS) {
1569 if (ReplayCompiles &&
1570 (ReplaySuppressInitializers == 1 ||
1571 (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1572 // Hide the existence of the initializer for the purpose of replaying the compile
1573 return;
1574 }
1575
1576 #if INCLUDE_CDS
1577 // This is needed to ensure the consistency of the archived heap objects.
1578 if (has_archived_enum_objs()) {
1579 assert(is_shared(), "must be");
1580 bool initialized = CDSEnumKlass::initialize_enum_klass(this, CHECK);
1581 if (initialized) {
1582 return;
1606
1607 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1608 InterpreterOopMap* entry_for) {
1609 // Lazily create the _oop_map_cache at first request.
1610 // Load_acquire is needed to safely get instance published with CAS by another thread.
1611 OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1612 if (oop_map_cache == nullptr) {
1613 // Try to install new instance atomically.
1614 oop_map_cache = new OopMapCache();
1615 OopMapCache* other = Atomic::cmpxchg(&_oop_map_cache, (OopMapCache*)nullptr, oop_map_cache);
1616 if (other != nullptr) {
1617 // Someone else managed to install before us, ditch local copy and use the existing one.
1618 delete oop_map_cache;
1619 oop_map_cache = other;
1620 }
1621 }
1622 // _oop_map_cache is constant after init; lookup below does its own locking.
1623 oop_map_cache->lookup(method, bci, entry_for);
1624 }
1625
1626 bool InstanceKlass::contains_field_offset(int offset) {
1627 fieldDescriptor fd;
1628 return find_field_from_offset(offset, false, &fd);
1629 }
1630
1631 FieldInfo InstanceKlass::field(int index) const {
1632 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1633 if (fs.index() == index) {
1634 return fs.to_FieldInfo();
1635 }
1636 }
1637 fatal("Field not found");
1638 return FieldInfo();
1639 }
1640
1641 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1642 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1643 Symbol* f_name = fs.name();
1644 Symbol* f_sig = fs.signature();
1645 if (f_name == name && f_sig == sig) {
1646 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1647 return true;
1648 }
1649 }
1691
1692 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1693 // search order according to newest JVM spec (5.4.3.2, p.167).
1694 // 1) search for field in current klass
1695 if (find_local_field(name, sig, fd)) {
1696 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1697 }
1698 // 2) search for field recursively in direct superinterfaces
1699 if (is_static) {
1700 Klass* intf = find_interface_field(name, sig, fd);
1701 if (intf != nullptr) return intf;
1702 }
1703 // 3) apply field lookup recursively if superclass exists
1704 { Klass* supr = super();
1705 if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1706 }
1707 // 4) otherwise field lookup fails
1708 return nullptr;
1709 }
1710
1711
1712 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1713 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1714 if (fs.offset() == offset) {
1715 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1716 if (fd->is_static() == is_static) return true;
1717 }
1718 }
1719 return false;
1720 }
1721
1722
1723 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1724 Klass* klass = const_cast<InstanceKlass*>(this);
1725 while (klass != nullptr) {
1726 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1727 return true;
1728 }
1729 klass = klass->super();
1730 }
2082 }
2083
2084 // uncached_lookup_method searches both the local class methods array and all
2085 // superclasses methods arrays, skipping any overpass methods in superclasses,
2086 // and possibly skipping private methods.
2087 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2088 const Symbol* signature,
2089 OverpassLookupMode overpass_mode,
2090 PrivateLookupMode private_mode) const {
2091 OverpassLookupMode overpass_local_mode = overpass_mode;
2092 const Klass* klass = this;
2093 while (klass != nullptr) {
2094 Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2095 signature,
2096 overpass_local_mode,
2097 StaticLookupMode::find,
2098 private_mode);
2099 if (method != nullptr) {
2100 return method;
2101 }
2102 klass = klass->super();
2103 overpass_local_mode = OverpassLookupMode::skip; // Always ignore overpass methods in superclasses
2104 }
2105 return nullptr;
2106 }
2107
2108 #ifdef ASSERT
2109 // search through class hierarchy and return true if this class or
2110 // one of the superclasses was redefined
2111 bool InstanceKlass::has_redefined_this_or_super() const {
2112 const Klass* klass = this;
2113 while (klass != nullptr) {
2114 if (InstanceKlass::cast(klass)->has_been_redefined()) {
2115 return true;
2116 }
2117 klass = klass->super();
2118 }
2119 return false;
2120 }
2121 #endif
2478 int method_table_offset_in_words = ioe->offset()/wordSize;
2479 int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2480
2481 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2482 / itableOffsetEntry::size();
2483
2484 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2485 if (ioe->interface_klass() != nullptr) {
2486 it->push(ioe->interface_klass_addr());
2487 itableMethodEntry* ime = ioe->first_method_entry(this);
2488 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2489 for (int index = 0; index < n; index ++) {
2490 it->push(ime[index].method_addr());
2491 }
2492 }
2493 }
2494 }
2495
2496 it->push(&_nest_members);
2497 it->push(&_permitted_subclasses);
2498 it->push(&_record_components);
2499 }
2500
2501 #if INCLUDE_CDS
2502 void InstanceKlass::remove_unshareable_info() {
2503
2504 if (is_linked()) {
2505 assert(can_be_verified_at_dumptime(), "must be");
2506 // Remember this so we can avoid walking the hierarchy at runtime.
2507 set_verified_at_dump_time();
2508 }
2509
2510 Klass::remove_unshareable_info();
2511
2512 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2513 // Classes are attempted to link during dumping and may fail,
2514 // but these classes are still in the dictionary and class list in CLD.
2515 // If the class has failed verification, there is nothing else to remove.
2516 return;
2517 }
2518
2524
2525 { // Otherwise this needs to take out the Compile_lock.
2526 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2527 init_implementor();
2528 }
2529
2530 // Call remove_unshareable_info() on other objects that belong to this class, except
2531 // for constants()->remove_unshareable_info(), which is called in a separate pass in
2532 // ArchiveBuilder::make_klasses_shareable(),
2533
2534 for (int i = 0; i < methods()->length(); i++) {
2535 Method* m = methods()->at(i);
2536 m->remove_unshareable_info();
2537 }
2538
2539 // do array classes also.
2540 if (array_klasses() != nullptr) {
2541 array_klasses()->remove_unshareable_info();
2542 }
2543
2544 // These are not allocated from metaspace. They are safe to set to null.
2545 _source_debug_extension = nullptr;
2546 _dep_context = nullptr;
2547 _osr_nmethods_head = nullptr;
2548 #if INCLUDE_JVMTI
2549 _breakpoints = nullptr;
2550 _previous_versions = nullptr;
2551 _cached_class_file = nullptr;
2552 _jvmti_cached_class_field_map = nullptr;
2553 #endif
2554
2555 _init_thread = nullptr;
2556 _methods_jmethod_ids = nullptr;
2557 _jni_ids = nullptr;
2558 _oop_map_cache = nullptr;
2559 // clear _nest_host to ensure re-load at runtime
2560 _nest_host = nullptr;
2561 init_shared_package_entry();
2562 _dep_context_last_cleaned = 0;
2563
2564 remove_unshareable_flags();
2608 void InstanceKlass::compute_has_loops_flag_for_methods() {
2609 Array<Method*>* methods = this->methods();
2610 for (int index = 0; index < methods->length(); ++index) {
2611 Method* m = methods->at(index);
2612 if (!m->is_overpass()) { // work around JDK-8305771
2613 m->compute_has_loops_flag();
2614 }
2615 }
2616 }
2617
2618 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2619 PackageEntry* pkg_entry, TRAPS) {
2620 // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
2621 // before the InstanceKlass is added to the SystemDictionary. Make
2622 // sure the current state is <loaded.
2623 assert(!is_loaded(), "invalid init state");
2624 assert(!shared_loading_failed(), "Must not try to load failed class again");
2625 set_package(loader_data, pkg_entry, CHECK);
2626 Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2627
2628 Array<Method*>* methods = this->methods();
2629 int num_methods = methods->length();
2630 for (int index = 0; index < num_methods; ++index) {
2631 methods->at(index)->restore_unshareable_info(CHECK);
2632 }
2633 #if INCLUDE_JVMTI
2634 if (JvmtiExport::has_redefined_a_class()) {
2635 // Reinitialize vtable because RedefineClasses may have changed some
2636 // entries in this vtable for super classes so the CDS vtable might
2637 // point to old or obsolete entries. RedefineClasses doesn't fix up
2638 // vtables in the shared system dictionary, only the main one.
2639 // It also redefines the itable too so fix that too.
2640 // First fix any default methods that point to a super class that may
2641 // have been redefined.
2642 bool trace_name_printed = false;
2643 adjust_default_methods(&trace_name_printed);
2644 vtable().initialize_vtable();
2645 itable().initialize_itable();
2646 }
2647 #endif
2648
2649 // restore constant pool resolved references
2650 constants()->restore_unshareable_info(CHECK);
2651
2652 if (array_klasses() != nullptr) {
2653 // To get a consistent list of classes we need MultiArray_lock to ensure
2654 // array classes aren't observed while they are being restored.
2655 RecursiveLocker rl(MultiArray_lock, THREAD);
2656 assert(this == array_klasses()->bottom_klass(), "sanity");
2657 // Array classes have null protection domain.
2658 // --> see ArrayKlass::complete_create_array_klass()
2659 array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
2660 }
2661
2662 // Initialize @ValueBased class annotation if not already set in the archived klass.
2663 if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation() && !is_value_based()) {
2664 set_is_value_based();
2665 }
2666 }
2667
2668 // Check if a class or any of its supertypes has a version older than 50.
2669 // CDS will not perform verification of old classes during dump time because
2670 // without changing the old verifier, the verification constraint cannot be
2671 // retrieved during dump time.
2672 // Verification of archived old classes will be performed during run time.
2673 bool InstanceKlass::can_be_verified_at_dumptime() const {
2674 if (MetaspaceShared::is_in_shared_metaspace(this)) {
2675 // This is a class that was dumped into the base archive, so we know
2676 // it was verified at dump time.
2829 } else {
2830 // Adding one to the attribute length in order to store a null terminator
2831 // character could cause an overflow because the attribute length is
2832 // already coded with an u4 in the classfile, but in practice, it's
2833 // unlikely to happen.
2834 assert((length+1) > length, "Overflow checking");
2835 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
2836 for (int i = 0; i < length; i++) {
2837 sde[i] = array[i];
2838 }
2839 sde[length] = '\0';
2840 _source_debug_extension = sde;
2841 }
2842 }
2843
2844 Symbol* InstanceKlass::generic_signature() const { return _constants->generic_signature(); }
2845 u2 InstanceKlass::generic_signature_index() const { return _constants->generic_signature_index(); }
2846 void InstanceKlass::set_generic_signature_index(u2 sig_index) { _constants->set_generic_signature_index(sig_index); }
2847
2848 const char* InstanceKlass::signature_name() const {
2849
2850 // Get the internal name as a c string
2851 const char* src = (const char*) (name()->as_C_string());
2852 const int src_length = (int)strlen(src);
2853
2854 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
2855
2856 // Add L as type indicator
2857 int dest_index = 0;
2858 dest[dest_index++] = JVM_SIGNATURE_CLASS;
2859
2860 // Add the actual class name
2861 for (int src_index = 0; src_index < src_length; ) {
2862 dest[dest_index++] = src[src_index++];
2863 }
2864
2865 if (is_hidden()) { // Replace the last '+' with a '.'.
2866 for (int index = (int)src_length; index > 0; index--) {
2867 if (dest[index] == '+') {
2868 dest[index] = JVM_SIGNATURE_DOT;
2869 break;
2870 }
2871 }
2872 }
2873
2874 // Add the semicolon and the null
2875 dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
2876 dest[dest_index] = '\0';
2877 return dest;
2878 }
3180 jint InstanceKlass::compute_modifier_flags() const {
3181 jint access = access_flags().as_int();
3182
3183 // But check if it happens to be member class.
3184 InnerClassesIterator iter(this);
3185 for (; !iter.done(); iter.next()) {
3186 int ioff = iter.inner_class_info_index();
3187 // Inner class attribute can be zero, skip it.
3188 // Strange but true: JVM spec. allows null inner class refs.
3189 if (ioff == 0) continue;
3190
3191 // only look at classes that are already loaded
3192 // since we are looking for the flags for our self.
3193 Symbol* inner_name = constants()->klass_name_at(ioff);
3194 if (name() == inner_name) {
3195 // This is really a member class.
3196 access = iter.inner_access_flags();
3197 break;
3198 }
3199 }
3200 // Remember to strip ACC_SUPER bit
3201 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS;
3202 }
3203
3204 jint InstanceKlass::jvmti_class_status() const {
3205 jint result = 0;
3206
3207 if (is_linked()) {
3208 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3209 }
3210
3211 if (is_initialized()) {
3212 assert(is_linked(), "Class status is not consistent");
3213 result |= JVMTI_CLASS_STATUS_INITIALIZED;
3214 }
3215 if (is_in_error_state()) {
3216 result |= JVMTI_CLASS_STATUS_ERROR;
3217 }
3218 return result;
3219 }
3220
3221 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {
3435 }
3436 osr = osr->osr_link();
3437 }
3438
3439 assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3440 if (best != nullptr && best->comp_level() >= comp_level) {
3441 return best;
3442 }
3443 return nullptr;
3444 }
3445
3446 // -----------------------------------------------------------------------------------------------------
3447 // Printing
3448
3449 #define BULLET " - "
3450
3451 static const char* state_names[] = {
3452 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
3453 };
3454
3455 static void print_vtable(intptr_t* start, int len, outputStream* st) {
3456 for (int i = 0; i < len; i++) {
3457 intptr_t e = start[i];
3458 st->print("%d : " INTPTR_FORMAT, i, e);
3459 if (MetaspaceObj::is_valid((Metadata*)e)) {
3460 st->print(" ");
3461 ((Metadata*)e)->print_value_on(st);
3462 }
3463 st->cr();
3464 }
3465 }
3466
3467 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3468 return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);
3469 }
3470
3471 const char* InstanceKlass::init_state_name() const {
3472 return state_names[init_state()];
3473 }
3474
3475 void InstanceKlass::print_on(outputStream* st) const {
3476 assert(is_klass(), "must be klass");
3477 Klass::print_on(st);
3478
3479 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3480 st->print(BULLET"klass size: %d", size()); st->cr();
3481 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3482 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3483 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3484 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3485 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3486 st->print(BULLET"sub: ");
3487 Klass* sub = subklass();
3488 int n;
3489 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3490 if (n < MaxSubklassPrintSize) {
3491 sub->print_value_on(st);
3492 st->print(" ");
3493 }
3494 }
3495 if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3496 st->cr();
3497
3498 if (is_interface()) {
3499 st->print_cr(BULLET"nof implementors: %d", nof_implementors());
3500 if (nof_implementors() == 1) {
3501 st->print_cr(BULLET"implementor: ");
3502 st->print(" ");
3503 implementor()->print_value_on(st);
3504 st->cr();
3505 }
3506 }
3507
3508 st->print(BULLET"arrays: "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3509 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr();
3510 if (Verbose || WizardMode) {
3511 Array<Method*>* method_array = methods();
3512 for (int i = 0; i < method_array->length(); i++) {
3513 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3514 }
3515 }
3516 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr();
3517 if (default_methods() != nullptr) {
3518 st->print(BULLET"default_methods: "); default_methods()->print_value_on(st); st->cr();
3519 if (Verbose) {
3520 Array<Method*>* method_array = default_methods();
3521 for (int i = 0; i < method_array->length(); i++) {
3522 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
3523 }
3524 }
3525 }
3526 print_on_maybe_null(st, BULLET"default vtable indices: ", default_vtable_indices());
3527 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr();
3528 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3529
3530 st->print(BULLET"secondary supers: "); secondary_supers()->print_value_on(st); st->cr();
3531 if (UseSecondarySupersTable) {
3532 st->print(BULLET"hash_slot: %d", hash_slot()); st->cr();
3533 st->print(BULLET"bitmap: " UINTX_FORMAT_X_0, _bitmap); st->cr();
3534 }
3535 if (secondary_supers() != nullptr) {
3536 if (Verbose) {
3537 bool is_hashed = UseSecondarySupersTable && (_bitmap != SECONDARY_SUPERS_BITMAP_FULL);
3538 st->print_cr(BULLET"---- secondary supers (%d words):", _secondary_supers->length());
3539 for (int i = 0; i < _secondary_supers->length(); i++) {
3540 ResourceMark rm; // for external_name()
3541 Klass* secondary_super = _secondary_supers->at(i);
3542 st->print(BULLET"%2d:", i);
3543 if (is_hashed) {
3544 int home_slot = compute_home_slot(secondary_super, _bitmap);
3564 print_on_maybe_null(st, BULLET"field type annotations: ", fields_type_annotations());
3565 {
3566 bool have_pv = false;
3567 // previous versions are linked together through the InstanceKlass
3568 for (InstanceKlass* pv_node = previous_versions();
3569 pv_node != nullptr;
3570 pv_node = pv_node->previous_versions()) {
3571 if (!have_pv)
3572 st->print(BULLET"previous version: ");
3573 have_pv = true;
3574 pv_node->constants()->print_value_on(st);
3575 }
3576 if (have_pv) st->cr();
3577 }
3578
3579 print_on_maybe_null(st, BULLET"generic signature: ", generic_signature());
3580 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr();
3581 st->print(BULLET"nest members: "); nest_members()->print_value_on(st); st->cr();
3582 print_on_maybe_null(st, BULLET"record components: ", record_components());
3583 st->print(BULLET"permitted subclasses: "); permitted_subclasses()->print_value_on(st); st->cr();
3584 if (java_mirror() != nullptr) {
3585 st->print(BULLET"java mirror: ");
3586 java_mirror()->print_value_on(st);
3587 st->cr();
3588 } else {
3589 st->print_cr(BULLET"java mirror: null");
3590 }
3591 st->print(BULLET"vtable length %d (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3592 if (vtable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_vtable(), vtable_length(), st);
3593 st->print(BULLET"itable length %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3594 if (itable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_itable(), itable_length(), st);
3595 st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3596
3597 FieldPrinter print_static_field(st);
3598 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3599 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3600 FieldPrinter print_nonstatic_field(st);
3601 InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3602 ik->print_nonstatic_fields(&print_nonstatic_field);
3603
3604 st->print(BULLET"non-static oop maps: ");
3605 OopMapBlock* map = start_of_nonstatic_oop_maps();
3606 OopMapBlock* end_map = map + nonstatic_oop_map_count();
3607 while (map < end_map) {
3608 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3609 map++;
3610 }
3611 st->cr();
3612 }
3613
3614 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"
153
154 static inline bool is_class_loader(const Symbol* class_name,
155 const ClassFileParser& parser) {
156 assert(class_name != nullptr, "invariant");
157
158 if (class_name == vmSymbols::java_lang_ClassLoader()) {
159 return true;
160 }
161
162 if (vmClasses::ClassLoader_klass_loaded()) {
163 const Klass* const super_klass = parser.super_klass();
164 if (super_klass != nullptr) {
165 if (super_klass->is_subtype_of(vmClasses::ClassLoader_klass())) {
166 return true;
167 }
168 }
169 }
170 return false;
171 }
172
173 bool InstanceKlass::field_is_null_free_inline_type(int index) const {
174 return field(index).field_flags().is_null_free_inline_type();
175 }
176
177 bool InstanceKlass::is_class_in_loadable_descriptors_attribute(Symbol* name) const {
178 if (_loadable_descriptors == nullptr) return false;
179 for (int i = 0; i < _loadable_descriptors->length(); i++) {
180 Symbol* class_name = _constants->klass_at_noresolve(_loadable_descriptors->at(i));
181 if (class_name == name) return true;
182 }
183 return false;
184 }
185
186 static inline bool is_stack_chunk_class(const Symbol* class_name,
187 const ClassLoaderData* loader_data) {
188 return (class_name == vmSymbols::jdk_internal_vm_StackChunk() &&
189 loader_data->is_the_null_class_loader_data());
190 }
191
192 // private: called to verify that k is a static member of this nest.
193 // We know that k is an instance class in the same package and hence the
194 // same classloader.
195 bool InstanceKlass::has_nest_member(JavaThread* current, InstanceKlass* k) const {
196 assert(!is_hidden(), "unexpected hidden class");
197 if (_nest_members == nullptr || _nest_members == Universe::the_empty_short_array()) {
198 if (log_is_enabled(Trace, class, nestmates)) {
199 ResourceMark rm(current);
200 log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
201 k->external_name(), this->external_name());
202 }
203 return false;
204 }
205
438 log_trace(class, nestmates)("Class %s does %shave nestmate access to %s",
439 this->external_name(),
440 access ? "" : "NOT ",
441 k->external_name());
442 return access;
443 }
444
445 const char* InstanceKlass::nest_host_error() {
446 if (_nest_host_index == 0) {
447 return nullptr;
448 } else {
449 constantPoolHandle cph(Thread::current(), constants());
450 return SystemDictionary::find_nest_host_error(cph, (int)_nest_host_index);
451 }
452 }
453
454 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
455 const int size = InstanceKlass::size(parser.vtable_size(),
456 parser.itable_size(),
457 nonstatic_oop_map_size(parser.total_oop_map_count()),
458 parser.is_interface(),
459 parser.is_inline_type());
460
461 const Symbol* const class_name = parser.class_name();
462 assert(class_name != nullptr, "invariant");
463 ClassLoaderData* loader_data = parser.loader_data();
464 assert(loader_data != nullptr, "invariant");
465
466 InstanceKlass* ik;
467
468 // Allocation
469 if (parser.is_instance_ref_klass()) {
470 // java.lang.ref.Reference
471 ik = new (loader_data, size, THREAD) InstanceRefKlass(parser);
472 } else if (class_name == vmSymbols::java_lang_Class()) {
473 // mirror - java.lang.Class
474 ik = new (loader_data, size, THREAD) InstanceMirrorKlass(parser);
475 } else if (is_stack_chunk_class(class_name, loader_data)) {
476 // stack chunk
477 ik = new (loader_data, size, THREAD) InstanceStackChunkKlass(parser);
478 } else if (is_class_loader(class_name, parser)) {
479 // class loader - java.lang.ClassLoader
480 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass(parser);
481 } else if (parser.is_inline_type()) {
482 // inline type
483 ik = new (loader_data, size, THREAD) InlineKlass(parser);
484 } else {
485 // normal
486 ik = new (loader_data, size, THREAD) InstanceKlass(parser);
487 }
488
489 // Check for pending exception before adding to the loader data and incrementing
490 // class count. Can get OOM here.
491 if (HAS_PENDING_EXCEPTION) {
492 return nullptr;
493 }
494
495 #ifdef ASSERT
496 ik->bounds_check((address) ik->start_of_vtable(), false, size);
497 ik->bounds_check((address) ik->start_of_itable(), false, size);
498 ik->bounds_check((address) ik->end_of_itable(), true, size);
499 ik->bounds_check((address) ik->end_of_nonstatic_oop_maps(), true, size);
500 #endif //ASSERT
501 return ik;
502 }
503
504 #ifndef PRODUCT
505 bool InstanceKlass::bounds_check(address addr, bool edge_ok, intptr_t size_in_bytes) const {
506 const char* bad = nullptr;
507 address end = nullptr;
508 if (addr < (address)this) {
509 bad = "before";
510 } else if (addr == (address)this) {
511 if (edge_ok) return true;
512 bad = "just before";
513 } else if (addr == (end = (address)this + sizeof(intptr_t) * (size_in_bytes < 0 ? size() : size_in_bytes))) {
514 if (edge_ok) return true;
515 bad = "just after";
516 } else if (addr > end) {
517 bad = "after";
518 } else {
519 return true;
520 }
521 tty->print_cr("%s object bounds: " INTPTR_FORMAT " [" INTPTR_FORMAT ".." INTPTR_FORMAT "]",
522 bad, (intptr_t)addr, (intptr_t)this, (intptr_t)end);
523 Verbose = WizardMode = true; this->print(); //@@
524 return false;
525 }
526 #endif //PRODUCT
527
528 // copy method ordering from resource area to Metaspace
529 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
530 if (m != nullptr) {
531 // allocate a new array and copy contents (memcpy?)
532 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
533 for (int i = 0; i < m->length(); i++) {
534 _method_ordering->at_put(i, m->at(i));
535 }
536 } else {
537 _method_ordering = Universe::the_empty_int_array();
538 }
539 }
540
541 // create a new array of vtable_indices for default methods
542 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
543 Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
544 assert(default_vtable_indices() == nullptr, "only create once");
545 set_default_vtable_indices(vtable_indices);
546 return vtable_indices;
547 }
548
549
550 InstanceKlass::InstanceKlass() {
551 assert(CDSConfig::is_dumping_static_archive() || CDSConfig::is_using_archive(), "only for CDS");
552 }
553
554 InstanceKlass::InstanceKlass(const ClassFileParser& parser, KlassKind kind, ReferenceType reference_type) :
555 Klass(kind),
556 _nest_members(nullptr),
557 _nest_host(nullptr),
558 _permitted_subclasses(nullptr),
559 _record_components(nullptr),
560 _static_field_size(parser.static_field_size()),
561 _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
562 _itable_len(parser.itable_size()),
563 _nest_host_index(0),
564 _init_state(allocated),
565 _reference_type(reference_type),
566 _init_thread(nullptr),
567 _inline_type_field_klasses(nullptr),
568 _null_marker_offsets(nullptr),
569 _loadable_descriptors(nullptr),
570 _adr_inlineklass_fixed_block(nullptr)
571 {
572 set_vtable_length(parser.vtable_size());
573 set_access_flags(parser.access_flags());
574 if (parser.is_hidden()) set_is_hidden();
575 set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
576 false));
577 if (parser.has_inline_fields()) {
578 set_has_inline_type_fields();
579 }
580
581 assert(nullptr == _methods, "underlying memory not zeroed?");
582 assert(is_instance_klass(), "is layout incorrect?");
583 assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
584 }
585
586 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
587 Array<Method*>* methods) {
588 if (methods != nullptr && methods != Universe::the_empty_method_array() &&
589 !methods->is_shared()) {
590 for (int i = 0; i < methods->length(); i++) {
591 Method* method = methods->at(i);
592 if (method == nullptr) continue; // maybe null if error processing
593 // Only want to delete methods that are not executing for RedefineClasses.
594 // The previous version will point to them so they're not totally dangling
595 assert (!method->on_stack(), "shouldn't be called with methods on stack");
596 MetadataFactory::free_metadata(loader_data, method);
597 }
598 MetadataFactory::free_array<Method*>(loader_data, methods);
599 }
699 (address)(secondary_supers()) != (address)(transitive_interfaces()) &&
700 !secondary_supers()->is_shared()) {
701 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers());
702 }
703 set_secondary_supers(nullptr);
704
705 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
706 set_transitive_interfaces(nullptr);
707 set_local_interfaces(nullptr);
708
709 if (fieldinfo_stream() != nullptr && !fieldinfo_stream()->is_shared()) {
710 MetadataFactory::free_array<u1>(loader_data, fieldinfo_stream());
711 }
712 set_fieldinfo_stream(nullptr);
713
714 if (fields_status() != nullptr && !fields_status()->is_shared()) {
715 MetadataFactory::free_array<FieldStatus>(loader_data, fields_status());
716 }
717 set_fields_status(nullptr);
718
719 if (inline_type_field_klasses_array() != nullptr) {
720 MetadataFactory::free_array<InlineKlass*>(loader_data, inline_type_field_klasses_array());
721 set_inline_type_field_klasses_array(nullptr);
722 }
723
724 if (null_marker_offsets_array() != nullptr) {
725 MetadataFactory::free_array<int>(loader_data, null_marker_offsets_array());
726 set_null_marker_offsets_array(nullptr);
727 }
728
729 // If a method from a redefined class is using this constant pool, don't
730 // delete it, yet. The new class's previous version will point to this.
731 if (constants() != nullptr) {
732 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
733 if (!constants()->is_shared()) {
734 MetadataFactory::free_metadata(loader_data, constants());
735 }
736 // Delete any cached resolution errors for the constant pool
737 SystemDictionary::delete_resolution_error(constants());
738
739 set_constants(nullptr);
740 }
741
742 if (inner_classes() != nullptr &&
743 inner_classes() != Universe::the_empty_short_array() &&
744 !inner_classes()->is_shared()) {
745 MetadataFactory::free_array<jushort>(loader_data, inner_classes());
746 }
747 set_inner_classes(nullptr);
748
749 if (nest_members() != nullptr &&
750 nest_members() != Universe::the_empty_short_array() &&
751 !nest_members()->is_shared()) {
752 MetadataFactory::free_array<jushort>(loader_data, nest_members());
753 }
754 set_nest_members(nullptr);
755
756 if (permitted_subclasses() != nullptr &&
757 permitted_subclasses() != Universe::the_empty_short_array() &&
758 !permitted_subclasses()->is_shared()) {
759 MetadataFactory::free_array<jushort>(loader_data, permitted_subclasses());
760 }
761 set_permitted_subclasses(nullptr);
762
763 if (loadable_descriptors() != nullptr &&
764 loadable_descriptors() != Universe::the_empty_short_array() &&
765 !loadable_descriptors()->is_shared()) {
766 MetadataFactory::free_array<jushort>(loader_data, loadable_descriptors());
767 }
768 set_loadable_descriptors(nullptr);
769
770 // We should deallocate the Annotations instance if it's not in shared spaces.
771 if (annotations() != nullptr && !annotations()->is_shared()) {
772 MetadataFactory::free_metadata(loader_data, annotations());
773 }
774 set_annotations(nullptr);
775
776 SystemDictionaryShared::handle_class_unloading(this);
777
778 #if INCLUDE_CDS_JAVA_HEAP
779 if (CDSConfig::is_dumping_heap()) {
780 HeapShared::remove_scratch_objects(this);
781 }
782 #endif
783 }
784
785 bool InstanceKlass::is_record() const {
786 return _record_components != nullptr &&
787 is_final() &&
788 java_super() == vmClasses::Record_klass();
789 }
908 vmSymbols::java_lang_IncompatibleClassChangeError(),
909 "class %s has interface %s as super class",
910 external_name(),
911 super_klass->external_name()
912 );
913 return false;
914 }
915
916 InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
917 ik_super->link_class_impl(CHECK_false);
918 }
919
920 // link all interfaces implemented by this class before linking this class
921 Array<InstanceKlass*>* interfaces = local_interfaces();
922 int num_interfaces = interfaces->length();
923 for (int index = 0; index < num_interfaces; index++) {
924 InstanceKlass* interk = interfaces->at(index);
925 interk->link_class_impl(CHECK_false);
926 }
927
928
929 // If a class declares a method that uses an inline class as an argument
930 // type or return inline type, this inline class must be loaded during the
931 // linking of this class because size and properties of the inline class
932 // must be known in order to be able to perform inline type optimizations.
933 // The implementation below is an approximation of this rule, the code
934 // iterates over all methods of the current class (including overridden
935 // methods), not only the methods declared by this class. This
936 // approximation makes the code simpler, and doesn't change the semantic
937 // because classes declaring methods overridden by the current class are
938 // linked (and have performed their own pre-loading) before the linking
939 // of the current class.
940
941
942 // Note:
943 // Inline class types are loaded during
944 // the loading phase (see ClassFileParser::post_process_parsed_stream()).
945 // Inline class types used as element types for array creation
946 // are not pre-loaded. Their loading is triggered by either anewarray
947 // or multianewarray bytecodes.
948
949 // Could it be possible to do the following processing only if the
950 // class uses inline types?
951 if (EnableValhalla) {
952 ResourceMark rm(THREAD);
953 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
954 if (fs.is_null_free_inline_type() && fs.access_flags().is_static()) {
955 Symbol* sig = fs.signature();
956 TempNewSymbol s = Signature::strip_envelope(sig);
957 if (s != name()) {
958 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());
959 Klass* klass = SystemDictionary::resolve_or_fail(s,
960 Handle(THREAD, class_loader()), Handle(THREAD, protection_domain()), true,
961 CHECK_false);
962 if (HAS_PENDING_EXCEPTION) {
963 log_warning(class, preload)("Preloading of class %s during linking of class %s (cause: null-free static field) failed: %s",
964 s->as_C_string(), name()->as_C_string(), PENDING_EXCEPTION->klass()->name()->as_C_string());
965 return false; // Exception is still pending
966 }
967 log_info(class, preload)("Preloading of class %s during linking of class %s (cause: null-free static field) succeeded",
968 s->as_C_string(), name()->as_C_string());
969 assert(klass != nullptr, "Sanity check");
970 if (!klass->is_inline_klass()) {
971 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
972 err_msg("class %s expects class %s to be a value class but it is an identity class",
973 name()->as_C_string(), klass->external_name()), false);
974 }
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 InstanceKlass* ik = InstanceKlass::cast(klass);
982 if (!ik->is_implicitly_constructible()) {
983 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(),
984 err_msg("class %s is not implicitly constructible and it is used in a null restricted static field (not supported)",
985 klass->external_name()), false);
986 }
987 // the inline_type_field_klasses_array might have been loaded with CDS, so update only if not already set and check consistency
988 if (inline_type_field_klasses_array()->at(fs.index()) == nullptr) {
989 set_inline_type_field_klass(fs.index(), InlineKlass::cast(ik));
990 }
991 assert(get_inline_type_field_klass(fs.index()) == ik, "Must match");
992 } else {
993 if (inline_type_field_klasses_array()->at(fs.index()) == nullptr) {
994 set_inline_type_field_klass(fs.index(), InlineKlass::cast(this));
995 }
996 assert(get_inline_type_field_klass(fs.index()) == this, "Must match");
997 }
998 }
999 }
1000
1001 // Aggressively preloading all classes from the LoadableDescriptors attribute
1002 if (loadable_descriptors() != nullptr) {
1003 HandleMark hm(THREAD);
1004 for (int i = 0; i < loadable_descriptors()->length(); i++) {
1005 Symbol* sig = constants()->symbol_at(loadable_descriptors()->at(i));
1006 if (!Signature::has_envelope(sig)) continue;
1007 TempNewSymbol class_name = Signature::strip_envelope(sig);
1008 if (class_name == name()) continue;
1009 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());
1010 oop loader = class_loader();
1011 oop protection_domain = this->protection_domain();
1012 Klass* klass = SystemDictionary::resolve_or_null(class_name,
1013 Handle(THREAD, loader), Handle(THREAD, protection_domain), THREAD);
1014 if (HAS_PENDING_EXCEPTION) {
1015 CLEAR_PENDING_EXCEPTION;
1016 }
1017 if (klass != nullptr) {
1018 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());
1019 if (!klass->is_inline_klass()) {
1020 // Non value class are allowed by the current spec, but it could be an indication of an issue so let's log a warning
1021 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());
1022 }
1023 } else {
1024 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());
1025 }
1026 }
1027 }
1028 }
1029
1030 // in case the class is linked in the process of linking its superclasses
1031 if (is_linked()) {
1032 return true;
1033 }
1034
1035 // trace only the link time for this klass that includes
1036 // the verification time
1037 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
1038 ClassLoader::perf_class_link_selftime(),
1039 ClassLoader::perf_classes_linked(),
1040 jt->get_thread_stat()->perf_recursion_counts_addr(),
1041 jt->get_thread_stat()->perf_timers_addr(),
1042 PerfClassTraceTime::CLASS_LINK);
1043
1044 // verification & rewriting
1045 {
1046 HandleMark hm(THREAD);
1047 Handle h_init_lock(THREAD, init_lock());
1048 ObjectLocker ol(h_init_lock, jt);
1049 // rewritten will have been set if loader constraint error found
1314 ss.print("Could not initialize class %s", external_name());
1315 if (cause.is_null()) {
1316 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), ss.as_string());
1317 } else {
1318 THROW_MSG_CAUSE(vmSymbols::java_lang_NoClassDefFoundError(),
1319 ss.as_string(), cause);
1320 }
1321 } else {
1322
1323 // Step 6
1324 set_init_state(being_initialized);
1325 set_init_thread(jt);
1326 if (debug_logging_enabled) {
1327 ResourceMark rm(jt);
1328 log_debug(class, init)("Thread \"%s\" is initializing %s",
1329 jt->name(), external_name());
1330 }
1331 }
1332 }
1333
1334 // Pre-allocating an instance of the default value
1335 if (is_inline_klass()) {
1336 InlineKlass* vk = InlineKlass::cast(this);
1337 oop val = vk->allocate_instance(THREAD);
1338 if (HAS_PENDING_EXCEPTION) {
1339 Handle e(THREAD, PENDING_EXCEPTION);
1340 CLEAR_PENDING_EXCEPTION;
1341 {
1342 EXCEPTION_MARK;
1343 add_initialization_error(THREAD, e);
1344 // Locks object, set state, and notify all waiting threads
1345 set_initialization_state_and_notify(initialization_error, THREAD);
1346 CLEAR_PENDING_EXCEPTION;
1347 }
1348 THROW_OOP(e());
1349 }
1350 vk->set_default_value(val);
1351 }
1352
1353 // Step 7
1354 // Next, if C is a class rather than an interface, initialize it's super class and super
1355 // interfaces.
1356 if (!is_interface()) {
1357 Klass* super_klass = super();
1358 if (super_klass != nullptr && super_klass->should_be_initialized()) {
1359 super_klass->initialize(THREAD);
1360 }
1361 // If C implements any interface that declares a non-static, concrete method,
1362 // the initialization of C triggers initialization of its super interfaces.
1363 // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
1364 // having a superinterface that declares, non-static, concrete methods
1365 if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
1366 initialize_super_interfaces(THREAD);
1367 }
1368
1369 // If any exceptions, complete abruptly, throwing the same exception as above.
1370 if (HAS_PENDING_EXCEPTION) {
1371 Handle e(THREAD, PENDING_EXCEPTION);
1372 CLEAR_PENDING_EXCEPTION;
1373 {
1374 EXCEPTION_MARK;
1375 add_initialization_error(THREAD, e);
1376 // Locks object, set state, and notify all waiting threads
1377 set_initialization_state_and_notify(initialization_error, THREAD);
1378 CLEAR_PENDING_EXCEPTION;
1379 }
1380 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
1381 THROW_OOP(e());
1382 }
1383 }
1384
1385 // Step 8
1386 // Initialize classes of inline fields
1387 if (EnableValhalla) {
1388 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1389 if (fs.is_null_free_inline_type()) {
1390
1391 // inline type field klass array entries must have alreadyt been filed at load time or link time
1392 Klass* klass = get_inline_type_field_klass(fs.index());
1393
1394 InstanceKlass::cast(klass)->initialize(THREAD);
1395 if (fs.access_flags().is_static()) {
1396 if (java_mirror()->obj_field(fs.offset()) == nullptr) {
1397 java_mirror()->obj_field_put(fs.offset(), InlineKlass::cast(klass)->default_value());
1398 }
1399 }
1400
1401 if (HAS_PENDING_EXCEPTION) {
1402 Handle e(THREAD, PENDING_EXCEPTION);
1403 CLEAR_PENDING_EXCEPTION;
1404 {
1405 EXCEPTION_MARK;
1406 add_initialization_error(THREAD, e);
1407 // Locks object, set state, and notify all waiting threads
1408 set_initialization_state_and_notify(initialization_error, THREAD);
1409 CLEAR_PENDING_EXCEPTION;
1410 }
1411 THROW_OOP(e());
1412 }
1413 }
1414 }
1415 }
1416
1417
1418 // Step 9
1419 {
1420 DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
1421 if (class_initializer() != nullptr) {
1422 // Timer includes any side effects of class initialization (resolution,
1423 // etc), but not recursive entry into call_class_initializer().
1424 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
1425 ClassLoader::perf_class_init_selftime(),
1426 ClassLoader::perf_classes_inited(),
1427 jt->get_thread_stat()->perf_recursion_counts_addr(),
1428 jt->get_thread_stat()->perf_timers_addr(),
1429 PerfClassTraceTime::CLASS_CLINIT);
1430 call_class_initializer(THREAD);
1431 } else {
1432 // The elapsed time is so small it's not worth counting.
1433 if (UsePerfData) {
1434 ClassLoader::perf_classes_inited()->inc();
1435 }
1436 call_class_initializer(THREAD);
1437 }
1438 }
1439
1440 // Step 10
1441 if (!HAS_PENDING_EXCEPTION) {
1442 set_initialization_state_and_notify(fully_initialized, CHECK);
1443 debug_only(vtable().verify(tty, true);)
1444 }
1445 else {
1446 // Step 11 and 12
1447 Handle e(THREAD, PENDING_EXCEPTION);
1448 CLEAR_PENDING_EXCEPTION;
1449 // JVMTI has already reported the pending exception
1450 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1451 JvmtiExport::clear_detected_exception(jt);
1452 {
1453 EXCEPTION_MARK;
1454 add_initialization_error(THREAD, e);
1455 set_initialization_state_and_notify(initialization_error, THREAD);
1456 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
1457 // JVMTI has already reported the pending exception
1458 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1459 JvmtiExport::clear_detected_exception(jt);
1460 }
1461 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1462 if (e->is_a(vmClasses::Error_klass())) {
1463 THROW_OOP(e());
1464 } else {
1465 JavaCallArguments args(e);
1466 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1731 ResourceMark rm(THREAD);
1732 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
1733 : vmSymbols::java_lang_InstantiationException(), external_name());
1734 }
1735 if (this == vmClasses::Class_klass()) {
1736 ResourceMark rm(THREAD);
1737 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
1738 : vmSymbols::java_lang_IllegalAccessException(), external_name());
1739 }
1740 }
1741
1742 ArrayKlass* InstanceKlass::array_klass(int n, TRAPS) {
1743 // Need load-acquire for lock-free read
1744 if (array_klasses_acquire() == nullptr) {
1745
1746 // Recursively lock array allocation
1747 RecursiveLocker rl(MultiArray_lock, THREAD);
1748
1749 // Check if another thread created the array klass while we were waiting for the lock.
1750 if (array_klasses() == nullptr) {
1751 ObjArrayKlass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, false, CHECK_NULL);
1752 // use 'release' to pair with lock-free load
1753 release_set_array_klasses(k);
1754 }
1755 }
1756
1757 // array_klasses() will always be set at this point
1758 ArrayKlass* ak = array_klasses();
1759 assert(ak != nullptr, "should be set");
1760 return ak->array_klass(n, THREAD);
1761 }
1762
1763 ArrayKlass* InstanceKlass::array_klass_or_null(int n) {
1764 // Need load-acquire for lock-free read
1765 ArrayKlass* ak = array_klasses_acquire();
1766 if (ak == nullptr) {
1767 return nullptr;
1768 } else {
1769 return ak->array_klass_or_null(n);
1770 }
1771 }
1772
1773 ArrayKlass* InstanceKlass::array_klass(TRAPS) {
1774 return array_klass(1, THREAD);
1775 }
1776
1777 ArrayKlass* InstanceKlass::array_klass_or_null() {
1778 return array_klass_or_null(1);
1779 }
1780
1781 static int call_class_initializer_counter = 0; // for debugging
1782
1783 Method* InstanceKlass::class_initializer() const {
1784 Method* clinit = find_method(
1785 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
1786 if (clinit != nullptr && clinit->is_class_initializer()) {
1787 return clinit;
1788 }
1789 return nullptr;
1790 }
1791
1792 void InstanceKlass::call_class_initializer(TRAPS) {
1793 if (ReplayCompiles &&
1794 (ReplaySuppressInitializers == 1 ||
1795 (ReplaySuppressInitializers >= 2 && class_loader() != nullptr))) {
1796 // Hide the existence of the initializer for the purpose of replaying the compile
1797 return;
1798 }
1799
1800 #if INCLUDE_CDS
1801 // This is needed to ensure the consistency of the archived heap objects.
1802 if (has_archived_enum_objs()) {
1803 assert(is_shared(), "must be");
1804 bool initialized = CDSEnumKlass::initialize_enum_klass(this, CHECK);
1805 if (initialized) {
1806 return;
1830
1831 void InstanceKlass::mask_for(const methodHandle& method, int bci,
1832 InterpreterOopMap* entry_for) {
1833 // Lazily create the _oop_map_cache at first request.
1834 // Load_acquire is needed to safely get instance published with CAS by another thread.
1835 OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
1836 if (oop_map_cache == nullptr) {
1837 // Try to install new instance atomically.
1838 oop_map_cache = new OopMapCache();
1839 OopMapCache* other = Atomic::cmpxchg(&_oop_map_cache, (OopMapCache*)nullptr, oop_map_cache);
1840 if (other != nullptr) {
1841 // Someone else managed to install before us, ditch local copy and use the existing one.
1842 delete oop_map_cache;
1843 oop_map_cache = other;
1844 }
1845 }
1846 // _oop_map_cache is constant after init; lookup below does its own locking.
1847 oop_map_cache->lookup(method, bci, entry_for);
1848 }
1849
1850
1851 FieldInfo InstanceKlass::field(int index) const {
1852 for (AllFieldStream fs(this); !fs.done(); fs.next()) {
1853 if (fs.index() == index) {
1854 return fs.to_FieldInfo();
1855 }
1856 }
1857 fatal("Field not found");
1858 return FieldInfo();
1859 }
1860
1861 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1862 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1863 Symbol* f_name = fs.name();
1864 Symbol* f_sig = fs.signature();
1865 if (f_name == name && f_sig == sig) {
1866 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1867 return true;
1868 }
1869 }
1911
1912 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1913 // search order according to newest JVM spec (5.4.3.2, p.167).
1914 // 1) search for field in current klass
1915 if (find_local_field(name, sig, fd)) {
1916 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
1917 }
1918 // 2) search for field recursively in direct superinterfaces
1919 if (is_static) {
1920 Klass* intf = find_interface_field(name, sig, fd);
1921 if (intf != nullptr) return intf;
1922 }
1923 // 3) apply field lookup recursively if superclass exists
1924 { Klass* supr = super();
1925 if (supr != nullptr) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
1926 }
1927 // 4) otherwise field lookup fails
1928 return nullptr;
1929 }
1930
1931 bool InstanceKlass::contains_field_offset(int offset) {
1932 if (this->is_inline_klass()) {
1933 InlineKlass* vk = InlineKlass::cast(this);
1934 return offset >= vk->first_field_offset() && offset < (vk->first_field_offset() + vk->get_payload_size_in_bytes());
1935 } else {
1936 fieldDescriptor fd;
1937 return find_field_from_offset(offset, false, &fd);
1938 }
1939 }
1940
1941 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1942 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
1943 if (fs.offset() == offset) {
1944 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
1945 if (fd->is_static() == is_static) return true;
1946 }
1947 }
1948 return false;
1949 }
1950
1951
1952 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
1953 Klass* klass = const_cast<InstanceKlass*>(this);
1954 while (klass != nullptr) {
1955 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
1956 return true;
1957 }
1958 klass = klass->super();
1959 }
2311 }
2312
2313 // uncached_lookup_method searches both the local class methods array and all
2314 // superclasses methods arrays, skipping any overpass methods in superclasses,
2315 // and possibly skipping private methods.
2316 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
2317 const Symbol* signature,
2318 OverpassLookupMode overpass_mode,
2319 PrivateLookupMode private_mode) const {
2320 OverpassLookupMode overpass_local_mode = overpass_mode;
2321 const Klass* klass = this;
2322 while (klass != nullptr) {
2323 Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
2324 signature,
2325 overpass_local_mode,
2326 StaticLookupMode::find,
2327 private_mode);
2328 if (method != nullptr) {
2329 return method;
2330 }
2331 if (name == vmSymbols::object_initializer_name()) {
2332 break; // <init> is never inherited
2333 }
2334 klass = klass->super();
2335 overpass_local_mode = OverpassLookupMode::skip; // Always ignore overpass methods in superclasses
2336 }
2337 return nullptr;
2338 }
2339
2340 #ifdef ASSERT
2341 // search through class hierarchy and return true if this class or
2342 // one of the superclasses was redefined
2343 bool InstanceKlass::has_redefined_this_or_super() const {
2344 const Klass* klass = this;
2345 while (klass != nullptr) {
2346 if (InstanceKlass::cast(klass)->has_been_redefined()) {
2347 return true;
2348 }
2349 klass = klass->super();
2350 }
2351 return false;
2352 }
2353 #endif
2710 int method_table_offset_in_words = ioe->offset()/wordSize;
2711 int itable_offset_in_words = (int)(start_of_itable() - (intptr_t*)this);
2712
2713 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words)
2714 / itableOffsetEntry::size();
2715
2716 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2717 if (ioe->interface_klass() != nullptr) {
2718 it->push(ioe->interface_klass_addr());
2719 itableMethodEntry* ime = ioe->first_method_entry(this);
2720 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2721 for (int index = 0; index < n; index ++) {
2722 it->push(ime[index].method_addr());
2723 }
2724 }
2725 }
2726 }
2727
2728 it->push(&_nest_members);
2729 it->push(&_permitted_subclasses);
2730 it->push(&_loadable_descriptors);
2731 it->push(&_record_components);
2732
2733 it->push(&_inline_type_field_klasses, MetaspaceClosure::_writable);
2734 it->push(&_null_marker_offsets);
2735 }
2736
2737 #if INCLUDE_CDS
2738 void InstanceKlass::remove_unshareable_info() {
2739
2740 if (is_linked()) {
2741 assert(can_be_verified_at_dumptime(), "must be");
2742 // Remember this so we can avoid walking the hierarchy at runtime.
2743 set_verified_at_dump_time();
2744 }
2745
2746 Klass::remove_unshareable_info();
2747
2748 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2749 // Classes are attempted to link during dumping and may fail,
2750 // but these classes are still in the dictionary and class list in CLD.
2751 // If the class has failed verification, there is nothing else to remove.
2752 return;
2753 }
2754
2760
2761 { // Otherwise this needs to take out the Compile_lock.
2762 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
2763 init_implementor();
2764 }
2765
2766 // Call remove_unshareable_info() on other objects that belong to this class, except
2767 // for constants()->remove_unshareable_info(), which is called in a separate pass in
2768 // ArchiveBuilder::make_klasses_shareable(),
2769
2770 for (int i = 0; i < methods()->length(); i++) {
2771 Method* m = methods()->at(i);
2772 m->remove_unshareable_info();
2773 }
2774
2775 // do array classes also.
2776 if (array_klasses() != nullptr) {
2777 array_klasses()->remove_unshareable_info();
2778 }
2779
2780 // These are not allocated from metaspace. They are safe to set to nullptr.
2781 _source_debug_extension = nullptr;
2782 _dep_context = nullptr;
2783 _osr_nmethods_head = nullptr;
2784 #if INCLUDE_JVMTI
2785 _breakpoints = nullptr;
2786 _previous_versions = nullptr;
2787 _cached_class_file = nullptr;
2788 _jvmti_cached_class_field_map = nullptr;
2789 #endif
2790
2791 _init_thread = nullptr;
2792 _methods_jmethod_ids = nullptr;
2793 _jni_ids = nullptr;
2794 _oop_map_cache = nullptr;
2795 // clear _nest_host to ensure re-load at runtime
2796 _nest_host = nullptr;
2797 init_shared_package_entry();
2798 _dep_context_last_cleaned = 0;
2799
2800 remove_unshareable_flags();
2844 void InstanceKlass::compute_has_loops_flag_for_methods() {
2845 Array<Method*>* methods = this->methods();
2846 for (int index = 0; index < methods->length(); ++index) {
2847 Method* m = methods->at(index);
2848 if (!m->is_overpass()) { // work around JDK-8305771
2849 m->compute_has_loops_flag();
2850 }
2851 }
2852 }
2853
2854 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
2855 PackageEntry* pkg_entry, TRAPS) {
2856 // InstanceKlass::add_to_hierarchy() sets the init_state to loaded
2857 // before the InstanceKlass is added to the SystemDictionary. Make
2858 // sure the current state is <loaded.
2859 assert(!is_loaded(), "invalid init state");
2860 assert(!shared_loading_failed(), "Must not try to load failed class again");
2861 set_package(loader_data, pkg_entry, CHECK);
2862 Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
2863
2864 if (is_inline_klass()) {
2865 InlineKlass::cast(this)->initialize_calling_convention(CHECK);
2866 }
2867
2868 Array<Method*>* methods = this->methods();
2869 int num_methods = methods->length();
2870 for (int index = 0; index < num_methods; ++index) {
2871 methods->at(index)->restore_unshareable_info(CHECK);
2872 }
2873 #if INCLUDE_JVMTI
2874 if (JvmtiExport::has_redefined_a_class()) {
2875 // Reinitialize vtable because RedefineClasses may have changed some
2876 // entries in this vtable for super classes so the CDS vtable might
2877 // point to old or obsolete entries. RedefineClasses doesn't fix up
2878 // vtables in the shared system dictionary, only the main one.
2879 // It also redefines the itable too so fix that too.
2880 // First fix any default methods that point to a super class that may
2881 // have been redefined.
2882 bool trace_name_printed = false;
2883 adjust_default_methods(&trace_name_printed);
2884 vtable().initialize_vtable();
2885 itable().initialize_itable();
2886 }
2887 #endif
2888
2889 // restore constant pool resolved references
2890 constants()->restore_unshareable_info(CHECK);
2891
2892 if (array_klasses() != nullptr) {
2893 // To get a consistent list of classes we need MultiArray_lock to ensure
2894 // array classes aren't observed while they are being restored.
2895 RecursiveLocker rl(MultiArray_lock, THREAD);
2896 assert(this == ObjArrayKlass::cast(array_klasses())->bottom_klass(), "sanity");
2897 // Array classes have null protection domain.
2898 // --> see ArrayKlass::complete_create_array_klass()
2899 array_klasses()->restore_unshareable_info(class_loader_data(), Handle(), CHECK);
2900 }
2901
2902 // Initialize @ValueBased class annotation if not already set in the archived klass.
2903 if (DiagnoseSyncOnValueBasedClasses && has_value_based_class_annotation() && !is_value_based()) {
2904 set_is_value_based();
2905 }
2906 }
2907
2908 // Check if a class or any of its supertypes has a version older than 50.
2909 // CDS will not perform verification of old classes during dump time because
2910 // without changing the old verifier, the verification constraint cannot be
2911 // retrieved during dump time.
2912 // Verification of archived old classes will be performed during run time.
2913 bool InstanceKlass::can_be_verified_at_dumptime() const {
2914 if (MetaspaceShared::is_in_shared_metaspace(this)) {
2915 // This is a class that was dumped into the base archive, so we know
2916 // it was verified at dump time.
3069 } else {
3070 // Adding one to the attribute length in order to store a null terminator
3071 // character could cause an overflow because the attribute length is
3072 // already coded with an u4 in the classfile, but in practice, it's
3073 // unlikely to happen.
3074 assert((length+1) > length, "Overflow checking");
3075 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
3076 for (int i = 0; i < length; i++) {
3077 sde[i] = array[i];
3078 }
3079 sde[length] = '\0';
3080 _source_debug_extension = sde;
3081 }
3082 }
3083
3084 Symbol* InstanceKlass::generic_signature() const { return _constants->generic_signature(); }
3085 u2 InstanceKlass::generic_signature_index() const { return _constants->generic_signature_index(); }
3086 void InstanceKlass::set_generic_signature_index(u2 sig_index) { _constants->set_generic_signature_index(sig_index); }
3087
3088 const char* InstanceKlass::signature_name() const {
3089 return signature_name_of_carrier(JVM_SIGNATURE_CLASS);
3090 }
3091
3092 const char* InstanceKlass::signature_name_of_carrier(char c) const {
3093 // Get the internal name as a c string
3094 const char* src = (const char*) (name()->as_C_string());
3095 const int src_length = (int)strlen(src);
3096
3097 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
3098
3099 // Add L or Q as type indicator
3100 int dest_index = 0;
3101 dest[dest_index++] = c;
3102
3103 // Add the actual class name
3104 for (int src_index = 0; src_index < src_length; ) {
3105 dest[dest_index++] = src[src_index++];
3106 }
3107
3108 if (is_hidden()) { // Replace the last '+' with a '.'.
3109 for (int index = (int)src_length; index > 0; index--) {
3110 if (dest[index] == '+') {
3111 dest[index] = JVM_SIGNATURE_DOT;
3112 break;
3113 }
3114 }
3115 }
3116
3117 // Add the semicolon and the null
3118 dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
3119 dest[dest_index] = '\0';
3120 return dest;
3121 }
3423 jint InstanceKlass::compute_modifier_flags() const {
3424 jint access = access_flags().as_int();
3425
3426 // But check if it happens to be member class.
3427 InnerClassesIterator iter(this);
3428 for (; !iter.done(); iter.next()) {
3429 int ioff = iter.inner_class_info_index();
3430 // Inner class attribute can be zero, skip it.
3431 // Strange but true: JVM spec. allows null inner class refs.
3432 if (ioff == 0) continue;
3433
3434 // only look at classes that are already loaded
3435 // since we are looking for the flags for our self.
3436 Symbol* inner_name = constants()->klass_name_at(ioff);
3437 if (name() == inner_name) {
3438 // This is really a member class.
3439 access = iter.inner_access_flags();
3440 break;
3441 }
3442 }
3443 return (access & JVM_ACC_WRITTEN_FLAGS);
3444 }
3445
3446 jint InstanceKlass::jvmti_class_status() const {
3447 jint result = 0;
3448
3449 if (is_linked()) {
3450 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
3451 }
3452
3453 if (is_initialized()) {
3454 assert(is_linked(), "Class status is not consistent");
3455 result |= JVMTI_CLASS_STATUS_INITIALIZED;
3456 }
3457 if (is_in_error_state()) {
3458 result |= JVMTI_CLASS_STATUS_ERROR;
3459 }
3460 return result;
3461 }
3462
3463 Method* InstanceKlass::method_at_itable(InstanceKlass* holder, int index, TRAPS) {
3677 }
3678 osr = osr->osr_link();
3679 }
3680
3681 assert(match_level == false || best == nullptr, "shouldn't pick up anything if match_level is set");
3682 if (best != nullptr && best->comp_level() >= comp_level) {
3683 return best;
3684 }
3685 return nullptr;
3686 }
3687
3688 // -----------------------------------------------------------------------------------------------------
3689 // Printing
3690
3691 #define BULLET " - "
3692
3693 static const char* state_names[] = {
3694 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
3695 };
3696
3697 static void print_vtable(address self, intptr_t* start, int len, outputStream* st) {
3698 ResourceMark rm;
3699 int* forward_refs = NEW_RESOURCE_ARRAY(int, len);
3700 for (int i = 0; i < len; i++) forward_refs[i] = 0;
3701 for (int i = 0; i < len; i++) {
3702 intptr_t e = start[i];
3703 st->print("%d : " INTPTR_FORMAT, i, e);
3704 if (forward_refs[i] != 0) {
3705 int from = forward_refs[i];
3706 int off = (int) start[from];
3707 st->print(" (offset %d <= [%d])", off, from);
3708 }
3709 if (MetaspaceObj::is_valid((Metadata*)e)) {
3710 st->print(" ");
3711 ((Metadata*)e)->print_value_on(st);
3712 } else if (self != nullptr && e > 0 && e < 0x10000) {
3713 address location = self + e;
3714 int index = (int)((intptr_t*)location - start);
3715 st->print(" (offset %d => [%d])", (int)e, index);
3716 if (index >= 0 && index < len)
3717 forward_refs[index] = i;
3718 }
3719 st->cr();
3720 }
3721 }
3722
3723 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3724 return print_vtable(nullptr, reinterpret_cast<intptr_t*>(start), len, st);
3725 }
3726
3727 template<typename T>
3728 static void print_array_on(outputStream* st, Array<T>* array) {
3729 if (array == nullptr) { st->print_cr("nullptr"); return; }
3730 array->print_value_on(st); st->cr();
3731 if (Verbose || WizardMode) {
3732 for (int i = 0; i < array->length(); i++) {
3733 st->print("%d : ", i); array->at(i)->print_value_on(st); st->cr();
3734 }
3735 }
3736 }
3737
3738 static void print_array_on(outputStream* st, Array<int>* array) {
3739 if (array == nullptr) { st->print_cr("nullptr"); return; }
3740 array->print_value_on(st); st->cr();
3741 if (Verbose || WizardMode) {
3742 for (int i = 0; i < array->length(); i++) {
3743 st->print("%d : %d", i, array->at(i)); st->cr();
3744 }
3745 }
3746 }
3747
3748 const char* InstanceKlass::init_state_name() const {
3749 return state_names[init_state()];
3750 }
3751
3752 void InstanceKlass::print_on(outputStream* st) const {
3753 assert(is_klass(), "must be klass");
3754 Klass::print_on(st);
3755
3756 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3757 st->print(BULLET"klass size: %d", size()); st->cr();
3758 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3759 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3760 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3761 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3762 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3763 st->print(BULLET"sub: ");
3764 Klass* sub = subklass();
3765 int n;
3766 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3767 if (n < MaxSubklassPrintSize) {
3768 sub->print_value_on(st);
3769 st->print(" ");
3770 }
3771 }
3772 if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
3773 st->cr();
3774
3775 if (is_interface()) {
3776 st->print_cr(BULLET"nof implementors: %d", nof_implementors());
3777 if (nof_implementors() == 1) {
3778 st->print_cr(BULLET"implementor: ");
3779 st->print(" ");
3780 implementor()->print_value_on(st);
3781 st->cr();
3782 }
3783 }
3784
3785 st->print(BULLET"arrays: "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
3786 st->print(BULLET"methods: "); print_array_on(st, methods());
3787 st->print(BULLET"method ordering: "); print_array_on(st, method_ordering());
3788 if (default_methods() != nullptr) {
3789 st->print(BULLET"default_methods: "); print_array_on(st, default_methods());
3790 }
3791 print_on_maybe_null(st, BULLET"default vtable indices: ", default_vtable_indices());
3792 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr();
3793 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
3794
3795 st->print(BULLET"secondary supers: "); secondary_supers()->print_value_on(st); st->cr();
3796 if (UseSecondarySupersTable) {
3797 st->print(BULLET"hash_slot: %d", hash_slot()); st->cr();
3798 st->print(BULLET"bitmap: " UINTX_FORMAT_X_0, _bitmap); st->cr();
3799 }
3800 if (secondary_supers() != nullptr) {
3801 if (Verbose) {
3802 bool is_hashed = UseSecondarySupersTable && (_bitmap != SECONDARY_SUPERS_BITMAP_FULL);
3803 st->print_cr(BULLET"---- secondary supers (%d words):", _secondary_supers->length());
3804 for (int i = 0; i < _secondary_supers->length(); i++) {
3805 ResourceMark rm; // for external_name()
3806 Klass* secondary_super = _secondary_supers->at(i);
3807 st->print(BULLET"%2d:", i);
3808 if (is_hashed) {
3809 int home_slot = compute_home_slot(secondary_super, _bitmap);
3829 print_on_maybe_null(st, BULLET"field type annotations: ", fields_type_annotations());
3830 {
3831 bool have_pv = false;
3832 // previous versions are linked together through the InstanceKlass
3833 for (InstanceKlass* pv_node = previous_versions();
3834 pv_node != nullptr;
3835 pv_node = pv_node->previous_versions()) {
3836 if (!have_pv)
3837 st->print(BULLET"previous version: ");
3838 have_pv = true;
3839 pv_node->constants()->print_value_on(st);
3840 }
3841 if (have_pv) st->cr();
3842 }
3843
3844 print_on_maybe_null(st, BULLET"generic signature: ", generic_signature());
3845 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr();
3846 st->print(BULLET"nest members: "); nest_members()->print_value_on(st); st->cr();
3847 print_on_maybe_null(st, BULLET"record components: ", record_components());
3848 st->print(BULLET"permitted subclasses: "); permitted_subclasses()->print_value_on(st); st->cr();
3849 st->print(BULLET"loadable descriptors: "); loadable_descriptors()->print_value_on(st); st->cr();
3850 if (java_mirror() != nullptr) {
3851 st->print(BULLET"java mirror: ");
3852 java_mirror()->print_value_on(st);
3853 st->cr();
3854 } else {
3855 st->print_cr(BULLET"java mirror: null");
3856 }
3857 st->print(BULLET"vtable length %d (start addr: " PTR_FORMAT ")", vtable_length(), p2i(start_of_vtable())); st->cr();
3858 if (vtable_length() > 0 && (Verbose || WizardMode)) print_vtable(start_of_vtable(), vtable_length(), st);
3859 st->print(BULLET"itable length %d (start addr: " PTR_FORMAT ")", itable_length(), p2i(start_of_itable())); st->cr();
3860 if (itable_length() > 0 && (Verbose || WizardMode)) print_vtable(nullptr, start_of_itable(), itable_length(), st);
3861 st->print_cr(BULLET"---- static fields (%d words):", static_field_size());
3862
3863 FieldPrinter print_static_field(st);
3864 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field);
3865 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size());
3866 FieldPrinter print_nonstatic_field(st);
3867 InstanceKlass* ik = const_cast<InstanceKlass*>(this);
3868 ik->print_nonstatic_fields(&print_nonstatic_field);
3869
3870 st->print(BULLET"non-static oop maps: ");
3871 OopMapBlock* map = start_of_nonstatic_oop_maps();
3872 OopMapBlock* end_map = map + nonstatic_oop_map_count();
3873 while (map < end_map) {
3874 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
3875 map++;
3876 }
3877 st->cr();
3878 }
3879
3880 void InstanceKlass::print_value_on(outputStream* st) const {
|