30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/classLoaderExt.hpp"
33 #include "classfile/dictionary.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/klassFactory.hpp"
36 #include "classfile/loaderConstraints.hpp"
37 #include "classfile/packageEntry.hpp"
38 #include "classfile/placeholders.hpp"
39 #include "classfile/protectionDomainCache.hpp"
40 #include "classfile/resolutionErrors.hpp"
41 #include "classfile/stringTable.hpp"
42 #include "classfile/systemDictionary.hpp"
43 #include "classfile/vmSymbols.hpp"
44 #include "code/codeCache.hpp"
45 #include "compiler/compileBroker.hpp"
46 #include "gc/shared/gcTraceTime.inline.hpp"
47 #include "gc/shared/oopStorage.inline.hpp"
48 #include "interpreter/bytecodeStream.hpp"
49 #include "interpreter/interpreter.hpp"
50 #include "jfr/jfrEvents.hpp"
51 #include "logging/log.hpp"
52 #include "logging/logStream.hpp"
53 #include "memory/filemap.hpp"
54 #include "memory/metaspaceClosure.hpp"
55 #include "memory/oopFactory.hpp"
56 #include "memory/resourceArea.hpp"
57 #include "oops/access.inline.hpp"
58 #include "oops/instanceKlass.hpp"
59 #include "oops/instanceRefKlass.hpp"
60 #include "oops/klass.inline.hpp"
61 #include "oops/method.inline.hpp"
62 #include "oops/methodData.hpp"
63 #include "oops/objArrayKlass.hpp"
64 #include "oops/objArrayOop.inline.hpp"
65 #include "oops/oop.inline.hpp"
66 #include "oops/symbol.hpp"
67 #include "oops/typeArrayKlass.hpp"
68 #include "prims/jvmtiEnvBase.hpp"
69 #include "prims/resolvedMethodTable.hpp"
70 #include "prims/methodHandles.hpp"
71 #include "runtime/arguments.hpp"
72 #include "runtime/arguments_ext.hpp"
73 #include "runtime/biasedLocking.hpp"
74 #include "runtime/fieldType.hpp"
75 #include "runtime/handles.inline.hpp"
76 #include "runtime/java.hpp"
77 #include "runtime/javaCalls.hpp"
78 #include "runtime/mutexLocker.hpp"
79 #include "runtime/orderAccess.hpp"
80 #include "runtime/sharedRuntime.hpp"
81 #include "runtime/signature.hpp"
82 #include "services/classLoadingService.hpp"
83 #include "services/diagnosticCommand.hpp"
84 #include "services/threadService.hpp"
85 #include "utilities/macros.hpp"
86 #if INCLUDE_CDS
87 #include "classfile/systemDictionaryShared.hpp"
88 #endif
89 #if INCLUDE_JVMCI
90 #include "jvmci/jvmciRuntime.hpp"
91 #endif
92
93 PlaceholderTable* SystemDictionary::_placeholders = NULL;
94 Dictionary* SystemDictionary::_shared_dictionary = NULL;
95 LoaderConstraintTable* SystemDictionary::_loader_constraints = NULL;
96 ResolutionErrorTable* SystemDictionary::_resolution_errors = NULL;
97 SymbolPropertyTable* SystemDictionary::_invoke_method_table = NULL;
98 ProtectionDomainCacheTable* SystemDictionary::_pd_cache_table = NULL;
99
100 int SystemDictionary::_number_of_modifications = 0;
101 oop SystemDictionary::_system_loader_lock_obj = NULL;
102
103 InstanceKlass* SystemDictionary::_well_known_klasses[SystemDictionary::WKID_LIMIT]
104 = { NULL /*, NULL...*/ };
105
1834 k->set_init_state(InstanceKlass::loaded);
1835 // Now flush all code that depended on old class hierarchy.
1836 // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)
1837 // Also, first reinitialize vtable because it may have gotten out of synch
1838 // while the new class wasn't connected to the class hierarchy.
1839 CodeCache::flush_dependents_on(k);
1840 }
1841
1842 // ----------------------------------------------------------------------------
1843 // GC support
1844
1845 // Assumes classes in the SystemDictionary are only unloaded at a safepoint
1846 // Note: anonymous classes are not in the SD.
1847 bool SystemDictionary::do_unloading(GCTimer* gc_timer,
1848 bool do_cleaning) {
1849
1850 bool unloading_occurred;
1851 {
1852 GCTraceTime(Debug, gc, phases) t("ClassLoaderData", gc_timer);
1853
1854 // First, mark for unload all ClassLoaderData referencing a dead class loader.
1855 unloading_occurred = ClassLoaderDataGraph::do_unloading(do_cleaning);
1856 if (unloading_occurred) {
1857 ClassLoaderDataGraph::clean_module_and_package_info();
1858 }
1859 }
1860
1861 // TODO: just return if !unloading_occurred.
1862 if (unloading_occurred) {
1863 {
1864 GCTraceTime(Debug, gc, phases) t("SymbolTable", gc_timer);
1865 // Check if there's work to do in the SymbolTable
1866 SymbolTable::do_check_concurrent_work();
1867 }
1868
1869 {
1870 GCTraceTime(Debug, gc, phases) t("Dictionary", gc_timer);
1871 constraints()->purge_loader_constraints();
1872 resolution_errors()->purge_resolution_errors();
1873 }
1874 }
1875
1876 {
1877 GCTraceTime(Debug, gc, phases) t("ProtectionDomainCacheTable", gc_timer);
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30 #include "classfile/classLoader.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/classLoaderExt.hpp"
33 #include "classfile/dictionary.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/klassFactory.hpp"
36 #include "classfile/loaderConstraints.hpp"
37 #include "classfile/packageEntry.hpp"
38 #include "classfile/placeholders.hpp"
39 #include "classfile/protectionDomainCache.hpp"
40 #include "classfile/resolutionErrors.hpp"
41 #include "classfile/stringTable.hpp"
42 #include "classfile/systemDictionary.hpp"
43 #include "classfile/vmSymbols.hpp"
44 #include "code/codeCache.hpp"
45 #include "compiler/compileBroker.hpp"
46 #include "gc/shared/gcTraceTime.inline.hpp"
47 #include "gc/shared/oopStorage.inline.hpp"
48 #include "interpreter/bytecodeStream.hpp"
49 #include "interpreter/interpreter.hpp"
50 #include "jfr/jfr.hpp"
51 #include "jfr/jfrEvents.hpp"
52 #include "logging/log.hpp"
53 #include "logging/logStream.hpp"
54 #include "memory/filemap.hpp"
55 #include "memory/metaspaceClosure.hpp"
56 #include "memory/oopFactory.hpp"
57 #include "memory/resourceArea.hpp"
58 #include "oops/access.inline.hpp"
59 #include "oops/instanceKlass.hpp"
60 #include "oops/instanceRefKlass.hpp"
61 #include "oops/klass.inline.hpp"
62 #include "oops/method.inline.hpp"
63 #include "oops/methodData.hpp"
64 #include "oops/objArrayKlass.hpp"
65 #include "oops/objArrayOop.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/symbol.hpp"
68 #include "oops/typeArrayKlass.hpp"
69 #include "prims/jvmtiEnvBase.hpp"
70 #include "prims/resolvedMethodTable.hpp"
71 #include "prims/methodHandles.hpp"
72 #include "runtime/arguments.hpp"
73 #include "runtime/arguments_ext.hpp"
74 #include "runtime/biasedLocking.hpp"
75 #include "runtime/fieldType.hpp"
76 #include "runtime/handles.inline.hpp"
77 #include "runtime/java.hpp"
78 #include "runtime/javaCalls.hpp"
79 #include "runtime/mutexLocker.hpp"
80 #include "runtime/orderAccess.hpp"
81 #include "runtime/sharedRuntime.hpp"
82 #include "runtime/signature.hpp"
83 #include "services/classLoadingService.hpp"
84 #include "services/diagnosticCommand.hpp"
85 #include "services/threadService.hpp"
86 #include "utilities/macros.hpp"
87 #include "utilities/ticks.hpp"
88 #if INCLUDE_CDS
89 #include "classfile/systemDictionaryShared.hpp"
90 #endif
91 #if INCLUDE_JVMCI
92 #include "jvmci/jvmciRuntime.hpp"
93 #endif
94
95 PlaceholderTable* SystemDictionary::_placeholders = NULL;
96 Dictionary* SystemDictionary::_shared_dictionary = NULL;
97 LoaderConstraintTable* SystemDictionary::_loader_constraints = NULL;
98 ResolutionErrorTable* SystemDictionary::_resolution_errors = NULL;
99 SymbolPropertyTable* SystemDictionary::_invoke_method_table = NULL;
100 ProtectionDomainCacheTable* SystemDictionary::_pd_cache_table = NULL;
101
102 int SystemDictionary::_number_of_modifications = 0;
103 oop SystemDictionary::_system_loader_lock_obj = NULL;
104
105 InstanceKlass* SystemDictionary::_well_known_klasses[SystemDictionary::WKID_LIMIT]
106 = { NULL /*, NULL...*/ };
107
1836 k->set_init_state(InstanceKlass::loaded);
1837 // Now flush all code that depended on old class hierarchy.
1838 // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)
1839 // Also, first reinitialize vtable because it may have gotten out of synch
1840 // while the new class wasn't connected to the class hierarchy.
1841 CodeCache::flush_dependents_on(k);
1842 }
1843
1844 // ----------------------------------------------------------------------------
1845 // GC support
1846
1847 // Assumes classes in the SystemDictionary are only unloaded at a safepoint
1848 // Note: anonymous classes are not in the SD.
1849 bool SystemDictionary::do_unloading(GCTimer* gc_timer,
1850 bool do_cleaning) {
1851
1852 bool unloading_occurred;
1853 {
1854 GCTraceTime(Debug, gc, phases) t("ClassLoaderData", gc_timer);
1855
1856 #if INCLUDE_JFR
1857 // If unloading occurs, make sure time stamp is consistent.
1858 if (Jfr::is_enabled()) {
1859 InstanceKlass::set_class_unload_time(Ticks::now());
1860 }
1861 #endif
1862
1863 // First, mark for unload all ClassLoaderData referencing a dead class loader.
1864 unloading_occurred = ClassLoaderDataGraph::do_unloading(do_cleaning);
1865 if (unloading_occurred) {
1866 ClassLoaderDataGraph::clean_module_and_package_info();
1867 #if INCLUDE_JFR
1868 if (Jfr::is_enabled()) {
1869 Jfr::on_unloading_classes();
1870 }
1871 #endif
1872 }
1873 }
1874
1875 // TODO: just return if !unloading_occurred.
1876 if (unloading_occurred) {
1877 {
1878 GCTraceTime(Debug, gc, phases) t("SymbolTable", gc_timer);
1879 // Check if there's work to do in the SymbolTable
1880 SymbolTable::do_check_concurrent_work();
1881 }
1882
1883 {
1884 GCTraceTime(Debug, gc, phases) t("Dictionary", gc_timer);
1885 constraints()->purge_loader_constraints();
1886 resolution_errors()->purge_resolution_errors();
1887 }
1888 }
1889
1890 {
1891 GCTraceTime(Debug, gc, phases) t("ProtectionDomainCacheTable", gc_timer);
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