28 #include "cds/cdsConfig.hpp"
29 #include "cds/cdsEnumKlass.hpp"
30 #include "cds/classListWriter.hpp"
31 #include "cds/heapShared.hpp"
32 #include "classfile/classFileParser.hpp"
33 #include "classfile/classFileStream.hpp"
34 #include "classfile/classLoader.hpp"
35 #include "classfile/classLoaderData.inline.hpp"
36 #include "classfile/javaClasses.hpp"
37 #include "classfile/moduleEntry.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/systemDictionaryShared.hpp"
40 #include "classfile/verifier.hpp"
41 #include "classfile/vmClasses.hpp"
42 #include "classfile/vmSymbols.hpp"
43 #include "code/codeCache.hpp"
44 #include "code/dependencyContext.hpp"
45 #include "compiler/compilationPolicy.hpp"
46 #include "compiler/compileBroker.hpp"
47 #include "gc/shared/collectedHeap.inline.hpp"
48 #include "interpreter/bytecodeStream.hpp"
49 #include "interpreter/oopMapCache.hpp"
50 #include "interpreter/rewriter.hpp"
51 #include "jvm.h"
52 #include "jvmtifiles/jvmti.h"
53 #include "klass.inline.hpp"
54 #include "logging/log.hpp"
55 #include "logging/logMessage.hpp"
56 #include "logging/logStream.hpp"
57 #include "memory/allocation.inline.hpp"
58 #include "memory/iterator.inline.hpp"
59 #include "memory/metadataFactory.hpp"
60 #include "memory/metaspaceClosure.hpp"
61 #include "memory/oopFactory.hpp"
62 #include "memory/resourceArea.hpp"
63 #include "memory/universe.hpp"
64 #include "oops/constantPool.hpp"
65 #include "oops/fieldStreams.inline.hpp"
66 #include "oops/instanceClassLoaderKlass.hpp"
67 #include "oops/instanceKlass.inline.hpp"
71 #include "oops/klass.inline.hpp"
72 #include "oops/method.hpp"
73 #include "oops/oop.inline.hpp"
74 #include "oops/recordComponent.hpp"
75 #include "oops/symbol.hpp"
76 #include "prims/jvmtiExport.hpp"
77 #include "prims/jvmtiRedefineClasses.hpp"
78 #include "prims/jvmtiThreadState.hpp"
79 #include "prims/methodComparator.hpp"
80 #include "runtime/arguments.hpp"
81 #include "runtime/atomicAccess.hpp"
82 #include "runtime/deoptimization.hpp"
83 #include "runtime/fieldDescriptor.inline.hpp"
84 #include "runtime/handles.inline.hpp"
85 #include "runtime/javaCalls.hpp"
86 #include "runtime/javaThread.inline.hpp"
87 #include "runtime/mutexLocker.hpp"
88 #include "runtime/orderAccess.hpp"
89 #include "runtime/os.inline.hpp"
90 #include "runtime/reflection.hpp"
91 #include "runtime/synchronizer.hpp"
92 #include "runtime/threads.hpp"
93 #include "services/classLoadingService.hpp"
94 #include "services/finalizerService.hpp"
95 #include "services/threadService.hpp"
96 #include "utilities/dtrace.hpp"
97 #include "utilities/events.hpp"
98 #include "utilities/macros.hpp"
99 #include "utilities/nativeStackPrinter.hpp"
100 #include "utilities/stringUtils.hpp"
101 #ifdef COMPILER1
102 #include "c1/c1_Compiler.hpp"
103 #endif
104 #if INCLUDE_JFR
105 #include "jfr/jfrEvents.hpp"
106 #endif
107
108 #ifdef DTRACE_ENABLED
109
110
1061 return true;
1062 }
1063
1064 // Rewrite the byte codes of all of the methods of a class.
1065 // The rewriter must be called exactly once. Rewriting must happen after
1066 // verification but before the first method of the class is executed.
1067 void InstanceKlass::rewrite_class(TRAPS) {
1068 assert(is_loaded(), "must be loaded");
1069 if (is_rewritten()) {
1070 assert(in_aot_cache(), "rewriting an unshared class?");
1071 return;
1072 }
1073 Rewriter::rewrite(this, CHECK);
1074 set_rewritten();
1075 }
1076
1077 // Now relocate and link method entry points after class is rewritten.
1078 // This is outside is_rewritten flag. In case of an exception, it can be
1079 // executed more than once.
1080 void InstanceKlass::link_methods(TRAPS) {
1081 PerfTraceTime timer(ClassLoader::perf_ik_link_methods_time());
1082
1083 int len = methods()->length();
1084 for (int i = len-1; i >= 0; i--) {
1085 methodHandle m(THREAD, methods()->at(i));
1086
1087 // Set up method entry points for compiler and interpreter .
1088 m->link_method(m, CHECK);
1089 }
1090 }
1091
1092 // Eagerly initialize superinterfaces that declare default methods (concrete instance: any access)
1093 void InstanceKlass::initialize_super_interfaces(TRAPS) {
1094 assert (has_nonstatic_concrete_methods(), "caller should have checked this");
1095 for (int i = 0; i < local_interfaces()->length(); ++i) {
1096 InstanceKlass* ik = local_interfaces()->at(i);
1097
1098 // Initialization is depth first search ie. we start with top of the inheritance tree
1099 // has_nonstatic_concrete_methods drives searching superinterfaces since it
1100 // means has_nonstatic_concrete_methods in its superinterface hierarchy
1101 if (ik->has_nonstatic_concrete_methods()) {
1102 ik->initialize_super_interfaces(CHECK);
1103 }
1104
1105 // Only initialize() interfaces that "declare" concrete methods.
1170 assert_locked_or_safepoint(ClassInitError_lock);
1171 InitErrorTableCleaner cleaner;
1172 if (_initialization_error_table != nullptr) {
1173 _initialization_error_table->unlink(&cleaner);
1174 }
1175 }
1176
1177 void InstanceKlass::initialize_impl(TRAPS) {
1178 HandleMark hm(THREAD);
1179
1180 // Make sure klass is linked (verified) before initialization
1181 // A class could already be verified, since it has been reflected upon.
1182 link_class(CHECK);
1183
1184 DTRACE_CLASSINIT_PROBE(required, -1);
1185
1186 bool wait = false;
1187
1188 JavaThread* jt = THREAD;
1189
1190 bool debug_logging_enabled = log_is_enabled(Debug, class, init);
1191
1192 // refer to the JVM book page 47 for description of steps
1193 // Step 1
1194 {
1195 Handle h_init_lock(THREAD, init_lock());
1196 ObjectLocker ol(h_init_lock, jt);
1197
1198 // Step 2
1199 // If we were to use wait() instead of waitInterruptibly() then
1200 // we might end up throwing IE from link/symbol resolution sites
1201 // that aren't expected to throw. This would wreak havoc. See 6320309.
1202 while (is_being_initialized() && !is_reentrant_initialization(jt)) {
1203 if (debug_logging_enabled) {
1204 ResourceMark rm(jt);
1205 log_debug(class, init)("Thread \"%s\" waiting for initialization of %s by thread \"%s\"",
1206 jt->name(), external_name(), init_thread_name());
1207 }
1208 wait = true;
1209 jt->set_class_to_be_initialized(this);
1339 add_initialization_error(THREAD, e);
1340 set_initialization_state_and_notify(initialization_error, THREAD);
1341 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
1342 // JVMTI has already reported the pending exception
1343 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1344 JvmtiExport::clear_detected_exception(jt);
1345 }
1346 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1347 if (e->is_a(vmClasses::Error_klass())) {
1348 THROW_OOP(e());
1349 } else {
1350 JavaCallArguments args(e);
1351 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1352 vmSymbols::throwable_void_signature(),
1353 &args);
1354 }
1355 }
1356 DTRACE_CLASSINIT_PROBE_WAIT(end, -1, wait);
1357 }
1358
1359
1360 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) {
1361 Handle h_init_lock(THREAD, init_lock());
1362 if (h_init_lock() != nullptr) {
1363 ObjectLocker ol(h_init_lock, THREAD);
1364 set_init_thread(nullptr); // reset _init_thread before changing _init_state
1365 set_init_state(state);
1366 fence_and_clear_init_lock();
1367 ol.notify_all(CHECK);
1368 } else {
1369 assert(h_init_lock() != nullptr, "The initialization state should never be set twice");
1370 set_init_thread(nullptr); // reset _init_thread before changing _init_state
1371 set_init_state(state);
1372 }
1373 }
1374
1375 // Update hierarchy. This is done before the new klass has been added to the SystemDictionary. The Compile_lock
1376 // is grabbed, to ensure that the compiler is not using the class hierarchy.
1377 void InstanceKlass::add_to_hierarchy(JavaThread* current) {
1378 assert(!SafepointSynchronize::is_at_safepoint(), "must NOT be at safepoint");
1379
1560 tty->print("Registered ");
1561 i->print_value_on(tty);
1562 tty->print_cr(" (" PTR_FORMAT ") as finalizable", p2i(i));
1563 }
1564 instanceHandle h_i(THREAD, i);
1565 // Pass the handle as argument, JavaCalls::call expects oop as jobjects
1566 JavaValue result(T_VOID);
1567 JavaCallArguments args(h_i);
1568 methodHandle mh(THREAD, Universe::finalizer_register_method());
1569 JavaCalls::call(&result, mh, &args, CHECK_NULL);
1570 MANAGEMENT_ONLY(FinalizerService::on_register(h_i(), THREAD);)
1571 return h_i();
1572 }
1573
1574 instanceOop InstanceKlass::allocate_instance(TRAPS) {
1575 assert(!is_abstract() && !is_interface(), "Should not create this object");
1576 size_t size = size_helper(); // Query before forming handle.
1577 return (instanceOop)Universe::heap()->obj_allocate(this, size, CHECK_NULL);
1578 }
1579
1580 instanceOop InstanceKlass::allocate_instance(oop java_class, TRAPS) {
1581 Klass* k = java_lang_Class::as_Klass(java_class);
1582 if (k == nullptr) {
1583 ResourceMark rm(THREAD);
1584 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1585 }
1586 InstanceKlass* ik = cast(k);
1587 ik->check_valid_for_instantiation(false, CHECK_NULL);
1588 ik->initialize(CHECK_NULL);
1589 return ik->allocate_instance(THREAD);
1590 }
1591
1592 instanceHandle InstanceKlass::allocate_instance_handle(TRAPS) {
1593 return instanceHandle(THREAD, allocate_instance(THREAD));
1594 }
1595
1596 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) {
1597 if (is_interface() || is_abstract()) {
1598 ResourceMark rm(THREAD);
1599 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
1600 : vmSymbols::java_lang_InstantiationException(), external_name());
1663 // Hide the existence of the initializer for the purpose of replaying the compile
1664 return;
1665 }
1666
1667 #if INCLUDE_CDS
1668 // This is needed to ensure the consistency of the archived heap objects.
1669 if (has_aot_initialized_mirror() && CDSConfig::is_loading_heap()) {
1670 AOTClassInitializer::call_runtime_setup(THREAD, this);
1671 return;
1672 } else if (has_archived_enum_objs()) {
1673 assert(in_aot_cache(), "must be");
1674 bool initialized = CDSEnumKlass::initialize_enum_klass(this, CHECK);
1675 if (initialized) {
1676 return;
1677 }
1678 }
1679 #endif
1680
1681 methodHandle h_method(THREAD, class_initializer());
1682 assert(!is_initialized(), "we cannot initialize twice");
1683 LogTarget(Info, class, init) lt;
1684 if (lt.is_enabled()) {
1685 ResourceMark rm(THREAD);
1686 LogStream ls(lt);
1687 ls.print("%d Initializing ", call_class_initializer_counter++);
1688 name()->print_value_on(&ls);
1689 ls.print_cr("%s (" PTR_FORMAT ") by thread \"%s\"",
1690 h_method() == nullptr ? "(no method)" : "", p2i(this),
1691 THREAD->name());
1692 }
1693 if (h_method() != nullptr) {
1694 ThreadInClassInitializer ticl(THREAD, this); // Track class being initialized
1695 JavaCallArguments args; // No arguments
1696 JavaValue result(T_VOID);
1697 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
1698 }
1699 }
1700
1701 // If a class that implements this interface is initialized, is the JVM required
1702 // to first execute a <clinit> method declared in this interface,
1703 // or (if also_check_supers==true) any of the super types of this interface?
1704 //
1705 // JVMS 5.5. Initialization, step 7: Next, if C is a class rather than
1706 // an interface, then let SC be its superclass and let SI1, ..., SIn
1707 // be all superinterfaces of C (whether direct or indirect) that
1708 // declare at least one non-abstract, non-static method.
1709 //
1710 // So when an interface is initialized, it does not look at its
1711 // supers. But a proper class will ensure that all of its supers have
1712 // run their <clinit> methods, except that it disregards interfaces
1713 // that lack a non-static concrete method (i.e., a default method).
1714 // Therefore, you should probably call this method only when the
1715 // current class is a super of some proper class, not an interface.
1716 bool InstanceKlass::interface_needs_clinit_execution_as_super(bool also_check_supers) const {
1717 assert(is_interface(), "must be");
1718
2487 id == nullptr) {
2488 id = Method::make_jmethod_id(class_loader_data(), m);
2489 AtomicAccess::release_store(&jmeths[idnum + 1], id);
2490 }
2491 }
2492 }
2493
2494 // Lookup a jmethodID, null if not found. Do no blocking, no allocations, no handles
2495 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) {
2496 int idnum = method->method_idnum();
2497 jmethodID* jmeths = methods_jmethod_ids_acquire();
2498 return (jmeths != nullptr) ? jmeths[idnum + 1] : nullptr;
2499 }
2500
2501 inline DependencyContext InstanceKlass::dependencies() {
2502 DependencyContext dep_context(&_dep_context, &_dep_context_last_cleaned);
2503 return dep_context;
2504 }
2505
2506 void InstanceKlass::mark_dependent_nmethods(DeoptimizationScope* deopt_scope, KlassDepChange& changes) {
2507 dependencies().mark_dependent_nmethods(deopt_scope, changes);
2508 }
2509
2510 void InstanceKlass::add_dependent_nmethod(nmethod* nm) {
2511 assert_lock_strong(CodeCache_lock);
2512 dependencies().add_dependent_nmethod(nm);
2513 }
2514
2515 void InstanceKlass::clean_dependency_context() {
2516 dependencies().clean_unloading_dependents();
2517 }
2518
2519 #ifndef PRODUCT
2520 void InstanceKlass::print_dependent_nmethods(bool verbose) {
2521 dependencies().print_dependent_nmethods(verbose);
2522 }
2523
2524 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) {
2525 return dependencies().is_dependent_nmethod(nm);
2526 }
2527 #endif //PRODUCT
2626 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2627 if (ioe->interface_klass() != nullptr) {
2628 it->push(ioe->interface_klass_addr());
2629 itableMethodEntry* ime = ioe->first_method_entry(this);
2630 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2631 for (int index = 0; index < n; index ++) {
2632 it->push(ime[index].method_addr());
2633 }
2634 }
2635 }
2636 }
2637
2638 it->push(&_nest_host);
2639 it->push(&_nest_members);
2640 it->push(&_permitted_subclasses);
2641 it->push(&_record_components);
2642 }
2643
2644 #if INCLUDE_CDS
2645 void InstanceKlass::remove_unshareable_info() {
2646
2647 if (is_linked()) {
2648 assert(can_be_verified_at_dumptime(), "must be");
2649 // Remember this so we can avoid walking the hierarchy at runtime.
2650 set_verified_at_dump_time();
2651 }
2652
2653 _misc_flags.set_has_init_deps_processed(false);
2654
2655 Klass::remove_unshareable_info();
2656
2657 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2658 // Classes are attempted to link during dumping and may fail,
2659 // but these classes are still in the dictionary and class list in CLD.
2660 // If the class has failed verification, there is nothing else to remove.
2661 return;
2662 }
2663
2664 // Reset to the 'allocated' state to prevent any premature accessing to
2665 // a shared class at runtime while the class is still being loaded and
2666 // restored. A class' init_state is set to 'loaded' at runtime when it's
3614 static void print_vtable(intptr_t* start, int len, outputStream* st) {
3615 for (int i = 0; i < len; i++) {
3616 intptr_t e = start[i];
3617 st->print("%d : " INTPTR_FORMAT, i, e);
3618 if (MetaspaceObj::is_valid((Metadata*)e)) {
3619 st->print(" ");
3620 ((Metadata*)e)->print_value_on(st);
3621 }
3622 st->cr();
3623 }
3624 }
3625
3626 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3627 return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);
3628 }
3629
3630 const char* InstanceKlass::init_state_name() const {
3631 return state_names[init_state()];
3632 }
3633
3634 void InstanceKlass::print_on(outputStream* st) const {
3635 assert(is_klass(), "must be klass");
3636 Klass::print_on(st);
3637
3638 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3639 st->print(BULLET"klass size: %d", size()); st->cr();
3640 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3641 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3642 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3643 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3644 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3645 st->print(BULLET"sub: ");
3646 Klass* sub = subklass();
3647 int n;
3648 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3649 if (n < MaxSubklassPrintSize) {
3650 sub->print_value_on(st);
3651 st->print(" ");
3652 }
3653 }
3948 nullptr;
3949 // caller can be null, for example, during a JVMTI VM_Init hook
3950 if (caller != nullptr) {
3951 info_stream.print(" source: instance of %s", caller->external_name());
3952 } else {
3953 // source is unknown
3954 }
3955 } else {
3956 oop class_loader = loader_data->class_loader();
3957 info_stream.print(" source: %s", class_loader->klass()->external_name());
3958 }
3959 } else {
3960 assert(this->in_aot_cache(), "must be");
3961 if (AOTMetaspace::in_aot_cache_dynamic_region((void*)this)) {
3962 info_stream.print(" source: shared objects file (top)");
3963 } else {
3964 info_stream.print(" source: shared objects file");
3965 }
3966 }
3967
3968 msg.info("%s", info_stream.as_string());
3969
3970 if (log_is_enabled(Debug, class, load)) {
3971 stringStream debug_stream;
3972
3973 // Class hierarchy info
3974 debug_stream.print(" klass: " PTR_FORMAT " super: " PTR_FORMAT,
3975 p2i(this), p2i(super()));
3976
3977 // Interfaces
3978 if (local_interfaces() != nullptr && local_interfaces()->length() > 0) {
3979 debug_stream.print(" interfaces:");
3980 int length = local_interfaces()->length();
3981 for (int i = 0; i < length; i++) {
3982 debug_stream.print(" " PTR_FORMAT,
3983 p2i(local_interfaces()->at(i)));
3984 }
3985 }
3986
3987 // Class loader
|
28 #include "cds/cdsConfig.hpp"
29 #include "cds/cdsEnumKlass.hpp"
30 #include "cds/classListWriter.hpp"
31 #include "cds/heapShared.hpp"
32 #include "classfile/classFileParser.hpp"
33 #include "classfile/classFileStream.hpp"
34 #include "classfile/classLoader.hpp"
35 #include "classfile/classLoaderData.inline.hpp"
36 #include "classfile/javaClasses.hpp"
37 #include "classfile/moduleEntry.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/systemDictionaryShared.hpp"
40 #include "classfile/verifier.hpp"
41 #include "classfile/vmClasses.hpp"
42 #include "classfile/vmSymbols.hpp"
43 #include "code/codeCache.hpp"
44 #include "code/dependencyContext.hpp"
45 #include "compiler/compilationPolicy.hpp"
46 #include "compiler/compileBroker.hpp"
47 #include "gc/shared/collectedHeap.inline.hpp"
48 #include "interpreter/bytecodeHistogram.hpp"
49 #include "interpreter/bytecodeStream.hpp"
50 #include "interpreter/oopMapCache.hpp"
51 #include "interpreter/rewriter.hpp"
52 #include "jvm.h"
53 #include "jvmtifiles/jvmti.h"
54 #include "klass.inline.hpp"
55 #include "logging/log.hpp"
56 #include "logging/logMessage.hpp"
57 #include "logging/logStream.hpp"
58 #include "memory/allocation.inline.hpp"
59 #include "memory/iterator.inline.hpp"
60 #include "memory/metadataFactory.hpp"
61 #include "memory/metaspaceClosure.hpp"
62 #include "memory/oopFactory.hpp"
63 #include "memory/resourceArea.hpp"
64 #include "memory/universe.hpp"
65 #include "oops/constantPool.hpp"
66 #include "oops/fieldStreams.inline.hpp"
67 #include "oops/instanceClassLoaderKlass.hpp"
68 #include "oops/instanceKlass.inline.hpp"
72 #include "oops/klass.inline.hpp"
73 #include "oops/method.hpp"
74 #include "oops/oop.inline.hpp"
75 #include "oops/recordComponent.hpp"
76 #include "oops/symbol.hpp"
77 #include "prims/jvmtiExport.hpp"
78 #include "prims/jvmtiRedefineClasses.hpp"
79 #include "prims/jvmtiThreadState.hpp"
80 #include "prims/methodComparator.hpp"
81 #include "runtime/arguments.hpp"
82 #include "runtime/atomicAccess.hpp"
83 #include "runtime/deoptimization.hpp"
84 #include "runtime/fieldDescriptor.inline.hpp"
85 #include "runtime/handles.inline.hpp"
86 #include "runtime/javaCalls.hpp"
87 #include "runtime/javaThread.inline.hpp"
88 #include "runtime/mutexLocker.hpp"
89 #include "runtime/orderAccess.hpp"
90 #include "runtime/os.inline.hpp"
91 #include "runtime/reflection.hpp"
92 #include "runtime/runtimeUpcalls.hpp"
93 #include "runtime/synchronizer.hpp"
94 #include "runtime/threads.hpp"
95 #include "services/classLoadingService.hpp"
96 #include "services/finalizerService.hpp"
97 #include "services/threadService.hpp"
98 #include "utilities/dtrace.hpp"
99 #include "utilities/events.hpp"
100 #include "utilities/macros.hpp"
101 #include "utilities/nativeStackPrinter.hpp"
102 #include "utilities/stringUtils.hpp"
103 #ifdef COMPILER1
104 #include "c1/c1_Compiler.hpp"
105 #endif
106 #if INCLUDE_JFR
107 #include "jfr/jfrEvents.hpp"
108 #endif
109
110 #ifdef DTRACE_ENABLED
111
112
1063 return true;
1064 }
1065
1066 // Rewrite the byte codes of all of the methods of a class.
1067 // The rewriter must be called exactly once. Rewriting must happen after
1068 // verification but before the first method of the class is executed.
1069 void InstanceKlass::rewrite_class(TRAPS) {
1070 assert(is_loaded(), "must be loaded");
1071 if (is_rewritten()) {
1072 assert(in_aot_cache(), "rewriting an unshared class?");
1073 return;
1074 }
1075 Rewriter::rewrite(this, CHECK);
1076 set_rewritten();
1077 }
1078
1079 // Now relocate and link method entry points after class is rewritten.
1080 // This is outside is_rewritten flag. In case of an exception, it can be
1081 // executed more than once.
1082 void InstanceKlass::link_methods(TRAPS) {
1083 PerfTraceElapsedTime timer(ClassLoader::perf_ik_link_methods_time());
1084
1085 int len = methods()->length();
1086 for (int i = len-1; i >= 0; i--) {
1087 methodHandle m(THREAD, methods()->at(i));
1088 RuntimeUpcalls::install_upcalls(m);
1089
1090 // Set up method entry points for compiler and interpreter .
1091 m->link_method(m, CHECK);
1092 }
1093 }
1094
1095 // Eagerly initialize superinterfaces that declare default methods (concrete instance: any access)
1096 void InstanceKlass::initialize_super_interfaces(TRAPS) {
1097 assert (has_nonstatic_concrete_methods(), "caller should have checked this");
1098 for (int i = 0; i < local_interfaces()->length(); ++i) {
1099 InstanceKlass* ik = local_interfaces()->at(i);
1100
1101 // Initialization is depth first search ie. we start with top of the inheritance tree
1102 // has_nonstatic_concrete_methods drives searching superinterfaces since it
1103 // means has_nonstatic_concrete_methods in its superinterface hierarchy
1104 if (ik->has_nonstatic_concrete_methods()) {
1105 ik->initialize_super_interfaces(CHECK);
1106 }
1107
1108 // Only initialize() interfaces that "declare" concrete methods.
1173 assert_locked_or_safepoint(ClassInitError_lock);
1174 InitErrorTableCleaner cleaner;
1175 if (_initialization_error_table != nullptr) {
1176 _initialization_error_table->unlink(&cleaner);
1177 }
1178 }
1179
1180 void InstanceKlass::initialize_impl(TRAPS) {
1181 HandleMark hm(THREAD);
1182
1183 // Make sure klass is linked (verified) before initialization
1184 // A class could already be verified, since it has been reflected upon.
1185 link_class(CHECK);
1186
1187 DTRACE_CLASSINIT_PROBE(required, -1);
1188
1189 bool wait = false;
1190
1191 JavaThread* jt = THREAD;
1192
1193 if (ForceProfiling) {
1194 // Preallocate MDOs.
1195 for (int i = 0; i < methods()->length(); i++) {
1196 assert(!HAS_PENDING_EXCEPTION, "");
1197 methodHandle m(THREAD, methods()->at(i));
1198 Method::build_profiling_method_data(m, THREAD);
1199 if (HAS_PENDING_EXCEPTION) {
1200 ResourceMark rm;
1201 log_warning(cds)("MDO preallocation failed for %s", external_name());
1202 CLEAR_PENDING_EXCEPTION;
1203 break;
1204 }
1205 }
1206 }
1207
1208 bool debug_logging_enabled = log_is_enabled(Debug, class, init);
1209
1210 // refer to the JVM book page 47 for description of steps
1211 // Step 1
1212 {
1213 Handle h_init_lock(THREAD, init_lock());
1214 ObjectLocker ol(h_init_lock, jt);
1215
1216 // Step 2
1217 // If we were to use wait() instead of waitInterruptibly() then
1218 // we might end up throwing IE from link/symbol resolution sites
1219 // that aren't expected to throw. This would wreak havoc. See 6320309.
1220 while (is_being_initialized() && !is_reentrant_initialization(jt)) {
1221 if (debug_logging_enabled) {
1222 ResourceMark rm(jt);
1223 log_debug(class, init)("Thread \"%s\" waiting for initialization of %s by thread \"%s\"",
1224 jt->name(), external_name(), init_thread_name());
1225 }
1226 wait = true;
1227 jt->set_class_to_be_initialized(this);
1357 add_initialization_error(THREAD, e);
1358 set_initialization_state_and_notify(initialization_error, THREAD);
1359 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
1360 // JVMTI has already reported the pending exception
1361 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
1362 JvmtiExport::clear_detected_exception(jt);
1363 }
1364 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
1365 if (e->is_a(vmClasses::Error_klass())) {
1366 THROW_OOP(e());
1367 } else {
1368 JavaCallArguments args(e);
1369 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
1370 vmSymbols::throwable_void_signature(),
1371 &args);
1372 }
1373 }
1374 DTRACE_CLASSINIT_PROBE_WAIT(end, -1, wait);
1375 }
1376
1377 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) {
1378 Handle h_init_lock(THREAD, init_lock());
1379 if (h_init_lock() != nullptr) {
1380 ObjectLocker ol(h_init_lock, THREAD);
1381 set_init_thread(nullptr); // reset _init_thread before changing _init_state
1382 set_init_state(state);
1383 fence_and_clear_init_lock();
1384 ol.notify_all(CHECK);
1385 } else {
1386 assert(h_init_lock() != nullptr, "The initialization state should never be set twice");
1387 set_init_thread(nullptr); // reset _init_thread before changing _init_state
1388 set_init_state(state);
1389 }
1390 }
1391
1392 // Update hierarchy. This is done before the new klass has been added to the SystemDictionary. The Compile_lock
1393 // is grabbed, to ensure that the compiler is not using the class hierarchy.
1394 void InstanceKlass::add_to_hierarchy(JavaThread* current) {
1395 assert(!SafepointSynchronize::is_at_safepoint(), "must NOT be at safepoint");
1396
1577 tty->print("Registered ");
1578 i->print_value_on(tty);
1579 tty->print_cr(" (" PTR_FORMAT ") as finalizable", p2i(i));
1580 }
1581 instanceHandle h_i(THREAD, i);
1582 // Pass the handle as argument, JavaCalls::call expects oop as jobjects
1583 JavaValue result(T_VOID);
1584 JavaCallArguments args(h_i);
1585 methodHandle mh(THREAD, Universe::finalizer_register_method());
1586 JavaCalls::call(&result, mh, &args, CHECK_NULL);
1587 MANAGEMENT_ONLY(FinalizerService::on_register(h_i(), THREAD);)
1588 return h_i();
1589 }
1590
1591 instanceOop InstanceKlass::allocate_instance(TRAPS) {
1592 assert(!is_abstract() && !is_interface(), "Should not create this object");
1593 size_t size = size_helper(); // Query before forming handle.
1594 return (instanceOop)Universe::heap()->obj_allocate(this, size, CHECK_NULL);
1595 }
1596
1597 instanceOop InstanceKlass::allocate_instance(oop java_class,
1598 const char* who,
1599 TRAPS) {
1600 Klass* k = java_lang_Class::as_Klass(java_class);
1601 if (k == nullptr) {
1602 ResourceMark rm(THREAD);
1603 THROW_(vmSymbols::java_lang_InstantiationException(), nullptr);
1604 }
1605 InstanceKlass* ik = cast(k);
1606 ik->check_valid_for_instantiation(false, CHECK_NULL);
1607 ik->initialize(CHECK_NULL);
1608 return ik->allocate_instance(THREAD);
1609 }
1610
1611 instanceHandle InstanceKlass::allocate_instance_handle(TRAPS) {
1612 return instanceHandle(THREAD, allocate_instance(THREAD));
1613 }
1614
1615 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) {
1616 if (is_interface() || is_abstract()) {
1617 ResourceMark rm(THREAD);
1618 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
1619 : vmSymbols::java_lang_InstantiationException(), external_name());
1682 // Hide the existence of the initializer for the purpose of replaying the compile
1683 return;
1684 }
1685
1686 #if INCLUDE_CDS
1687 // This is needed to ensure the consistency of the archived heap objects.
1688 if (has_aot_initialized_mirror() && CDSConfig::is_loading_heap()) {
1689 AOTClassInitializer::call_runtime_setup(THREAD, this);
1690 return;
1691 } else if (has_archived_enum_objs()) {
1692 assert(in_aot_cache(), "must be");
1693 bool initialized = CDSEnumKlass::initialize_enum_klass(this, CHECK);
1694 if (initialized) {
1695 return;
1696 }
1697 }
1698 #endif
1699
1700 methodHandle h_method(THREAD, class_initializer());
1701 assert(!is_initialized(), "we cannot initialize twice");
1702
1703 #if 0
1704 // FIXME -- revive this code added to leyden/premain for <clinit> profiling
1705 int init_id = log_class_init(THREAD, this);
1706 if (h_method() != nullptr) {
1707 JavaCallArguments args; // No arguments
1708 JavaValue result(T_VOID);
1709 InstanceKlass* outer = THREAD->set_class_being_initialized(this);
1710 jlong bc_start = (CountBytecodesPerThread ? THREAD->bc_counter_value() : BytecodeCounter::counter_value());
1711
1712 elapsedTimer timer;
1713 {
1714 PerfPauseTimer pt(THREAD->current_rt_call_timer(), THREAD->profile_rt_calls());
1715 PauseRuntimeCallProfiling prcp(THREAD, THREAD->profile_rt_calls());
1716
1717 timer.start();
1718 JavaCalls::call(&result, h_method, &args, THREAD); // Static call (no args)
1719 timer.stop();
1720 }
1721
1722 jlong bc_end = (CountBytecodesPerThread ? THREAD->bc_counter_value() : BytecodeCounter::counter_value());
1723
1724 jlong bc_executed = (bc_end - bc_start);
1725 if (UsePerfData && outer == nullptr) { // outermost clinit
1726 THREAD->inc_clinit_bc_counter_value(bc_executed);
1727 ClassLoader::perf_class_init_bytecodes_count()->inc(bc_executed);
1728 }
1729
1730 THREAD->set_class_being_initialized(outer);
1731
1732 LogStreamHandle(Debug, init) log;
1733 if (log.is_enabled()) {
1734 ResourceMark rm(THREAD);
1735 log.print("%d Initialized in %.3fms (total: " JLONG_FORMAT "ms); ",
1736 init_id, timer.seconds() * 1000.0, ClassLoader::class_init_time_ms());
1737 if (CountBytecodes || CountBytecodesPerThread) {
1738 log.print("executed " JLONG_FORMAT " bytecodes; ", bc_executed);
1739 }
1740 name()->print_value_on(&log);
1741 log.print_cr(" by thread " PTR_FORMAT " \"%s\" (" PTR_FORMAT ")",
1742 p2i(THREAD), THREAD->name(), p2i(this));
1743 }
1744 }
1745 LogTarget(Info, class, init) lt;
1746 if (lt.is_enabled()) {
1747 ResourceMark rm(THREAD);
1748 LogStream ls(lt);
1749 ls.print("%d Initialized ", init_id);
1750 name()->print_value_on(&ls);
1751 ls.print_cr("%s (" PTR_FORMAT ") by thread \"%s\"",
1752 h_method() == nullptr ? "(no method)" : "", p2i(this),
1753 THREAD->name());
1754 }
1755 #else
1756 LogTarget(Info, class, init) lt;
1757 if (lt.is_enabled()) {
1758 ResourceMark rm(THREAD);
1759 LogStream ls(lt);
1760 ls.print("%d Initializing ", call_class_initializer_counter++);
1761 name()->print_value_on(&ls);
1762 ls.print_cr("%s (" PTR_FORMAT ") by thread \"%s\"",
1763 h_method() == nullptr ? "(no method)" : "", p2i(this),
1764 THREAD->name());
1765 }
1766 if (h_method() != nullptr) {
1767 ThreadInClassInitializer ticl(THREAD, this); // Track class being initialized
1768 JavaCallArguments args; // No arguments
1769 JavaValue result(T_VOID);
1770 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
1771 }
1772 #endif
1773 }
1774
1775 // If a class that implements this interface is initialized, is the JVM required
1776 // to first execute a <clinit> method declared in this interface,
1777 // or (if also_check_supers==true) any of the super types of this interface?
1778 //
1779 // JVMS 5.5. Initialization, step 7: Next, if C is a class rather than
1780 // an interface, then let SC be its superclass and let SI1, ..., SIn
1781 // be all superinterfaces of C (whether direct or indirect) that
1782 // declare at least one non-abstract, non-static method.
1783 //
1784 // So when an interface is initialized, it does not look at its
1785 // supers. But a proper class will ensure that all of its supers have
1786 // run their <clinit> methods, except that it disregards interfaces
1787 // that lack a non-static concrete method (i.e., a default method).
1788 // Therefore, you should probably call this method only when the
1789 // current class is a super of some proper class, not an interface.
1790 bool InstanceKlass::interface_needs_clinit_execution_as_super(bool also_check_supers) const {
1791 assert(is_interface(), "must be");
1792
2561 id == nullptr) {
2562 id = Method::make_jmethod_id(class_loader_data(), m);
2563 AtomicAccess::release_store(&jmeths[idnum + 1], id);
2564 }
2565 }
2566 }
2567
2568 // Lookup a jmethodID, null if not found. Do no blocking, no allocations, no handles
2569 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) {
2570 int idnum = method->method_idnum();
2571 jmethodID* jmeths = methods_jmethod_ids_acquire();
2572 return (jmeths != nullptr) ? jmeths[idnum + 1] : nullptr;
2573 }
2574
2575 inline DependencyContext InstanceKlass::dependencies() {
2576 DependencyContext dep_context(&_dep_context, &_dep_context_last_cleaned);
2577 return dep_context;
2578 }
2579
2580 void InstanceKlass::mark_dependent_nmethods(DeoptimizationScope* deopt_scope, KlassDepChange& changes) {
2581 dependencies().mark_dependent_nmethods(deopt_scope, changes, this);
2582 }
2583
2584 void InstanceKlass::add_dependent_nmethod(nmethod* nm) {
2585 assert_lock_strong(CodeCache_lock);
2586 dependencies().add_dependent_nmethod(nm);
2587 }
2588
2589 void InstanceKlass::clean_dependency_context() {
2590 dependencies().clean_unloading_dependents();
2591 }
2592
2593 #ifndef PRODUCT
2594 void InstanceKlass::print_dependent_nmethods(bool verbose) {
2595 dependencies().print_dependent_nmethods(verbose);
2596 }
2597
2598 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) {
2599 return dependencies().is_dependent_nmethod(nm);
2600 }
2601 #endif //PRODUCT
2700 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
2701 if (ioe->interface_klass() != nullptr) {
2702 it->push(ioe->interface_klass_addr());
2703 itableMethodEntry* ime = ioe->first_method_entry(this);
2704 int n = klassItable::method_count_for_interface(ioe->interface_klass());
2705 for (int index = 0; index < n; index ++) {
2706 it->push(ime[index].method_addr());
2707 }
2708 }
2709 }
2710 }
2711
2712 it->push(&_nest_host);
2713 it->push(&_nest_members);
2714 it->push(&_permitted_subclasses);
2715 it->push(&_record_components);
2716 }
2717
2718 #if INCLUDE_CDS
2719 void InstanceKlass::remove_unshareable_info() {
2720 if (is_linked()) {
2721 assert(can_be_verified_at_dumptime(), "must be");
2722 // Remember this so we can avoid walking the hierarchy at runtime.
2723 set_verified_at_dump_time();
2724 }
2725
2726 _misc_flags.set_has_init_deps_processed(false);
2727
2728 Klass::remove_unshareable_info();
2729
2730 if (SystemDictionaryShared::has_class_failed_verification(this)) {
2731 // Classes are attempted to link during dumping and may fail,
2732 // but these classes are still in the dictionary and class list in CLD.
2733 // If the class has failed verification, there is nothing else to remove.
2734 return;
2735 }
2736
2737 // Reset to the 'allocated' state to prevent any premature accessing to
2738 // a shared class at runtime while the class is still being loaded and
2739 // restored. A class' init_state is set to 'loaded' at runtime when it's
3687 static void print_vtable(intptr_t* start, int len, outputStream* st) {
3688 for (int i = 0; i < len; i++) {
3689 intptr_t e = start[i];
3690 st->print("%d : " INTPTR_FORMAT, i, e);
3691 if (MetaspaceObj::is_valid((Metadata*)e)) {
3692 st->print(" ");
3693 ((Metadata*)e)->print_value_on(st);
3694 }
3695 st->cr();
3696 }
3697 }
3698
3699 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
3700 return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);
3701 }
3702
3703 const char* InstanceKlass::init_state_name() const {
3704 return state_names[init_state()];
3705 }
3706
3707 const char* InstanceKlass::state2name(ClassState s) {
3708 return state_names[s];
3709 }
3710
3711 void InstanceKlass::print_on(outputStream* st) const {
3712 assert(is_klass(), "must be klass");
3713 Klass::print_on(st);
3714
3715 st->print(BULLET"instance size: %d", size_helper()); st->cr();
3716 st->print(BULLET"klass size: %d", size()); st->cr();
3717 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
3718 st->print(BULLET"flags: "); _misc_flags.print_on(st); st->cr();
3719 st->print(BULLET"state: "); st->print_cr("%s", init_state_name());
3720 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
3721 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
3722 st->print(BULLET"sub: ");
3723 Klass* sub = subklass();
3724 int n;
3725 for (n = 0; sub != nullptr; n++, sub = sub->next_sibling()) {
3726 if (n < MaxSubklassPrintSize) {
3727 sub->print_value_on(st);
3728 st->print(" ");
3729 }
3730 }
4025 nullptr;
4026 // caller can be null, for example, during a JVMTI VM_Init hook
4027 if (caller != nullptr) {
4028 info_stream.print(" source: instance of %s", caller->external_name());
4029 } else {
4030 // source is unknown
4031 }
4032 } else {
4033 oop class_loader = loader_data->class_loader();
4034 info_stream.print(" source: %s", class_loader->klass()->external_name());
4035 }
4036 } else {
4037 assert(this->in_aot_cache(), "must be");
4038 if (AOTMetaspace::in_aot_cache_dynamic_region((void*)this)) {
4039 info_stream.print(" source: shared objects file (top)");
4040 } else {
4041 info_stream.print(" source: shared objects file");
4042 }
4043 }
4044
4045 info_stream.print(" loader:");
4046 #if INCLUDE_CDS
4047 if (in_aot_cache()) {
4048 info_stream.print(" %s", SystemDictionaryShared::loader_type_for_shared_class((Klass*)this));
4049 } else
4050 #endif
4051 if (loader_data == ClassLoaderData::the_null_class_loader_data()) {
4052 info_stream.print(" boot_loader");
4053 } else {
4054 oop class_loader = loader_data->class_loader();
4055 if (class_loader != nullptr) {
4056 info_stream.print(" %s", class_loader->klass()->external_name());
4057 oop cl_name_and_id = java_lang_ClassLoader::nameAndId(class_loader);
4058 if (cl_name_and_id != nullptr) {
4059 info_stream.print(" %s", java_lang_String::as_utf8_string(cl_name_and_id));
4060 }
4061 } else {
4062 info_stream.print(" null");
4063 }
4064 }
4065 msg.info("%s", info_stream.as_string());
4066
4067 if (log_is_enabled(Debug, class, load)) {
4068 stringStream debug_stream;
4069
4070 // Class hierarchy info
4071 debug_stream.print(" klass: " PTR_FORMAT " super: " PTR_FORMAT,
4072 p2i(this), p2i(super()));
4073
4074 // Interfaces
4075 if (local_interfaces() != nullptr && local_interfaces()->length() > 0) {
4076 debug_stream.print(" interfaces:");
4077 int length = local_interfaces()->length();
4078 for (int i = 0; i < length; i++) {
4079 debug_stream.print(" " PTR_FORMAT,
4080 p2i(local_interfaces()->at(i)));
4081 }
4082 }
4083
4084 // Class loader
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