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src/hotspot/share/memory/universe.cpp

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 120 OopHandle Universe::_preallocated_out_of_memory_error_array;
 121 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0;
 122 
 123 // Message details for OOME objects, preallocate these objects since they could be
 124 // used when throwing OOME, we should try to avoid further allocation in such case
 125 OopHandle Universe::_msg_metaspace;
 126 OopHandle Universe::_msg_class_metaspace;
 127 
 128 OopHandle Universe::_null_ptr_exception_instance;
 129 OopHandle Universe::_arithmetic_exception_instance;
 130 OopHandle Universe::_virtual_machine_error_instance;
 131 
 132 OopHandle Universe::_reference_pending_list;
 133 
 134 Array<Klass*>* Universe::_the_array_interfaces_array = nullptr;
 135 LatestMethodCache* Universe::_finalizer_register_cache = nullptr;
 136 LatestMethodCache* Universe::_loader_addClass_cache    = nullptr;
 137 LatestMethodCache* Universe::_throw_illegal_access_error_cache = nullptr;
 138 LatestMethodCache* Universe::_throw_no_such_method_error_cache = nullptr;
 139 LatestMethodCache* Universe::_do_stack_walk_cache     = nullptr;


 140 
 141 long Universe::verify_flags                           = Universe::Verify_All;
 142 
 143 Array<int>* Universe::_the_empty_int_array            = nullptr;
 144 Array<u2>* Universe::_the_empty_short_array           = nullptr;
 145 Array<Klass*>* Universe::_the_empty_klass_array     = nullptr;
 146 Array<InstanceKlass*>* Universe::_the_empty_instance_klass_array  = nullptr;
 147 Array<Method*>* Universe::_the_empty_method_array   = nullptr;
 148 
 149 // These variables are guarded by FullGCALot_lock.
 150 debug_only(OopHandle Universe::_fullgc_alot_dummy_array;)
 151 debug_only(int Universe::_fullgc_alot_dummy_next = 0;)
 152 
 153 // Heap
 154 int             Universe::_verify_count = 0;
 155 
 156 // Oop verification (see MacroAssembler::verify_oop)
 157 uintptr_t       Universe::_verify_oop_mask = 0;
 158 uintptr_t       Universe::_verify_oop_bits = (uintptr_t) -1;
 159 

 219 
 220 void Universe::metaspace_pointers_do(MetaspaceClosure* it) {
 221   it->push(&_fillerArrayKlassObj);
 222   for (int i = 0; i < T_LONG+1; i++) {
 223     it->push(&_typeArrayKlassObjs[i]);
 224   }
 225   it->push(&_objectArrayKlassObj);
 226 
 227   it->push(&_the_empty_int_array);
 228   it->push(&_the_empty_short_array);
 229   it->push(&_the_empty_klass_array);
 230   it->push(&_the_empty_instance_klass_array);
 231   it->push(&_the_empty_method_array);
 232   it->push(&_the_array_interfaces_array);
 233 
 234   _finalizer_register_cache->metaspace_pointers_do(it);
 235   _loader_addClass_cache->metaspace_pointers_do(it);
 236   _throw_illegal_access_error_cache->metaspace_pointers_do(it);
 237   _throw_no_such_method_error_cache->metaspace_pointers_do(it);
 238   _do_stack_walk_cache->metaspace_pointers_do(it);


 239 }
 240 
 241 #if INCLUDE_CDS_JAVA_HEAP
 242 void Universe::set_archived_basic_type_mirror_index(BasicType t, int index) {
 243   assert(CDSConfig::is_dumping_heap(), "sanity");
 244   assert(!is_reference_type(t), "sanity");
 245   _archived_basic_type_mirror_indices[t] = index;
 246 }
 247 
 248 void Universe::update_archived_basic_type_mirrors() {
 249   if (ArchiveHeapLoader::is_in_use()) {
 250     for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
 251       int index = _archived_basic_type_mirror_indices[i];
 252       if (!is_reference_type((BasicType)i) && index >= 0) {
 253         oop mirror_oop = HeapShared::get_root(index);
 254         assert(mirror_oop != nullptr, "must be");
 255         _basic_type_mirrors[i] = OopHandle(vm_global(), mirror_oop);
 256       }
 257     }
 258   }

 270   }
 271 #endif
 272 
 273   f->do_ptr(&_fillerArrayKlassObj);
 274   for (int i = 0; i < T_LONG+1; i++) {
 275     f->do_ptr(&_typeArrayKlassObjs[i]);
 276   }
 277 
 278   f->do_ptr(&_objectArrayKlassObj);
 279   f->do_ptr(&_the_array_interfaces_array);
 280   f->do_ptr(&_the_empty_int_array);
 281   f->do_ptr(&_the_empty_short_array);
 282   f->do_ptr(&_the_empty_method_array);
 283   f->do_ptr(&_the_empty_klass_array);
 284   f->do_ptr(&_the_empty_instance_klass_array);
 285   _finalizer_register_cache->serialize(f);
 286   _loader_addClass_cache->serialize(f);
 287   _throw_illegal_access_error_cache->serialize(f);
 288   _throw_no_such_method_error_cache->serialize(f);
 289   _do_stack_walk_cache->serialize(f);


 290 }
 291 
 292 
 293 void Universe::check_alignment(uintx size, uintx alignment, const char* name) {
 294   if (size < alignment || size % alignment != 0) {
 295     vm_exit_during_initialization(
 296       err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment));
 297   }
 298 }
 299 
 300 void initialize_basic_type_klass(Klass* k, TRAPS) {
 301   Klass* ok = vmClasses::Object_klass();
 302 #if INCLUDE_CDS
 303   if (UseSharedSpaces) {
 304     ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
 305     assert(k->super() == ok, "u3");
 306     if (k->is_instance_klass()) {
 307       InstanceKlass::cast(k)->restore_unshareable_info(loader_data, Handle(), nullptr, CHECK);
 308     } else {
 309       ArrayKlass::cast(k)->restore_unshareable_info(loader_data, Handle(), CHECK);

 353     }
 354 
 355     vmSymbols::initialize();
 356 
 357     SystemDictionary::initialize(CHECK);
 358 
 359     // Create string constants
 360     oop s = StringTable::intern("null", CHECK);
 361     _the_null_string = OopHandle(vm_global(), s);
 362     s = StringTable::intern("-2147483648", CHECK);
 363     _the_min_jint_string = OopHandle(vm_global(), s);
 364 
 365 
 366 #if INCLUDE_CDS
 367     if (UseSharedSpaces) {
 368       // Verify shared interfaces array.
 369       assert(_the_array_interfaces_array->at(0) ==
 370              vmClasses::Cloneable_klass(), "u3");
 371       assert(_the_array_interfaces_array->at(1) ==
 372              vmClasses::Serializable_klass(), "u3");

 373     } else
 374 #endif
 375     {
 376       // Set up shared interfaces array.  (Do this before supers are set up.)
 377       _the_array_interfaces_array->at_put(0, vmClasses::Cloneable_klass());
 378       _the_array_interfaces_array->at_put(1, vmClasses::Serializable_klass());
 379     }
 380 
 381     initialize_basic_type_klass(_fillerArrayKlassObj, CHECK);
 382 
 383     initialize_basic_type_klass(boolArrayKlassObj(), CHECK);
 384     initialize_basic_type_klass(charArrayKlassObj(), CHECK);
 385     initialize_basic_type_klass(floatArrayKlassObj(), CHECK);
 386     initialize_basic_type_klass(doubleArrayKlassObj(), CHECK);
 387     initialize_basic_type_klass(byteArrayKlassObj(), CHECK);
 388     initialize_basic_type_klass(shortArrayKlassObj(), CHECK);
 389     initialize_basic_type_klass(intArrayKlassObj(), CHECK);
 390     initialize_basic_type_klass(longArrayKlassObj(), CHECK);
 391 
 392     assert(_fillerArrayKlassObj != intArrayKlassObj(),

 778   TraceTime timer("Genesis", TRACETIME_LOG(Info, startuptime));
 779 
 780   initialize_global_behaviours();
 781 
 782   GCLogPrecious::initialize();
 783 
 784 #ifdef _LP64
 785   MetaspaceShared::adjust_heap_sizes_for_dumping();
 786 #endif // _LP64
 787 
 788   GCConfig::arguments()->initialize_heap_sizes();
 789 
 790   jint status = Universe::initialize_heap();
 791   if (status != JNI_OK) {
 792     return status;
 793   }
 794 
 795   Universe::initialize_tlab();
 796 
 797   Metaspace::global_initialize();
 798 
 799   // Initialize performance counters for metaspaces
 800   MetaspaceCounters::initialize_performance_counters();
 801 
 802   // Checks 'AfterMemoryInit' constraints.
 803   if (!JVMFlagLimit::check_all_constraints(JVMFlagConstraintPhase::AfterMemoryInit)) {
 804     return JNI_EINVAL;
 805   }
 806 
 807   ClassLoaderData::init_null_class_loader_data();
 808 
 809   // We have a heap so create the Method* caches before
 810   // Metaspace::initialize_shared_spaces() tries to populate them.
 811   Universe::_finalizer_register_cache = new LatestMethodCache();
 812   Universe::_loader_addClass_cache    = new LatestMethodCache();
 813   Universe::_throw_illegal_access_error_cache = new LatestMethodCache();
 814   Universe::_throw_no_such_method_error_cache = new LatestMethodCache();
 815   Universe::_do_stack_walk_cache = new LatestMethodCache();


 816 
 817 #if INCLUDE_CDS
 818   DynamicArchive::check_for_dynamic_dump();
 819   if (UseSharedSpaces) {
 820     // Read the data structures supporting the shared spaces (shared
 821     // system dictionary, symbol table, etc.)
 822     MetaspaceShared::initialize_shared_spaces();
 823   }
 824   if (CDSConfig::is_dumping_archive()) {
 825     MetaspaceShared::prepare_for_dumping();
 826   }
 827 #endif
 828 
 829   SymbolTable::create_table();
 830   StringTable::create_table();
 831 
 832   if (strlen(VerifySubSet) > 0) {
 833     Universe::initialize_verify_flags();
 834   }
 835 

 952                           vmClasses::internal_Unsafe_klass(),
 953                           "throwIllegalAccessError",
 954                           vmSymbols::void_method_signature(), true, CHECK);
 955 
 956   initialize_known_method(_throw_no_such_method_error_cache,
 957                           vmClasses::internal_Unsafe_klass(),
 958                           "throwNoSuchMethodError",
 959                           vmSymbols::void_method_signature(), true, CHECK);
 960 
 961   // Set up method for registering loaded classes in class loader vector
 962   initialize_known_method(_loader_addClass_cache,
 963                           vmClasses::ClassLoader_klass(),
 964                           "addClass",
 965                           vmSymbols::class_void_signature(), false, CHECK);
 966 
 967   // Set up method for stack walking
 968   initialize_known_method(_do_stack_walk_cache,
 969                           vmClasses::AbstractStackWalker_klass(),
 970                           "doStackWalk",
 971                           vmSymbols::doStackWalk_signature(), false, CHECK);











 972 }
 973 
 974 void universe2_init() {
 975   EXCEPTION_MARK;
 976   Universe::genesis(CATCH);
 977 }
 978 
 979 // Set after initialization of the module runtime, call_initModuleRuntime
 980 void universe_post_module_init() {
 981   Universe::_module_initialized = true;
 982 }
 983 
 984 bool universe_post_init() {
 985   assert(!is_init_completed(), "Error: initialization not yet completed!");
 986   Universe::_fully_initialized = true;
 987   EXCEPTION_MARK;
 988   if (!UseSharedSpaces) {
 989     reinitialize_vtables();
 990     reinitialize_itables();
 991   }

 120 OopHandle Universe::_preallocated_out_of_memory_error_array;
 121 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0;
 122 
 123 // Message details for OOME objects, preallocate these objects since they could be
 124 // used when throwing OOME, we should try to avoid further allocation in such case
 125 OopHandle Universe::_msg_metaspace;
 126 OopHandle Universe::_msg_class_metaspace;
 127 
 128 OopHandle Universe::_null_ptr_exception_instance;
 129 OopHandle Universe::_arithmetic_exception_instance;
 130 OopHandle Universe::_virtual_machine_error_instance;
 131 
 132 OopHandle Universe::_reference_pending_list;
 133 
 134 Array<Klass*>* Universe::_the_array_interfaces_array = nullptr;
 135 LatestMethodCache* Universe::_finalizer_register_cache = nullptr;
 136 LatestMethodCache* Universe::_loader_addClass_cache    = nullptr;
 137 LatestMethodCache* Universe::_throw_illegal_access_error_cache = nullptr;
 138 LatestMethodCache* Universe::_throw_no_such_method_error_cache = nullptr;
 139 LatestMethodCache* Universe::_do_stack_walk_cache     = nullptr;
 140 LatestMethodCache* Universe::_is_substitutable_cache  = nullptr;
 141 LatestMethodCache* Universe::_value_object_hash_code_cache = nullptr;
 142 
 143 long Universe::verify_flags                           = Universe::Verify_All;
 144 
 145 Array<int>* Universe::_the_empty_int_array            = nullptr;
 146 Array<u2>* Universe::_the_empty_short_array           = nullptr;
 147 Array<Klass*>* Universe::_the_empty_klass_array     = nullptr;
 148 Array<InstanceKlass*>* Universe::_the_empty_instance_klass_array  = nullptr;
 149 Array<Method*>* Universe::_the_empty_method_array   = nullptr;
 150 
 151 // These variables are guarded by FullGCALot_lock.
 152 debug_only(OopHandle Universe::_fullgc_alot_dummy_array;)
 153 debug_only(int Universe::_fullgc_alot_dummy_next = 0;)
 154 
 155 // Heap
 156 int             Universe::_verify_count = 0;
 157 
 158 // Oop verification (see MacroAssembler::verify_oop)
 159 uintptr_t       Universe::_verify_oop_mask = 0;
 160 uintptr_t       Universe::_verify_oop_bits = (uintptr_t) -1;
 161 

 221 
 222 void Universe::metaspace_pointers_do(MetaspaceClosure* it) {
 223   it->push(&_fillerArrayKlassObj);
 224   for (int i = 0; i < T_LONG+1; i++) {
 225     it->push(&_typeArrayKlassObjs[i]);
 226   }
 227   it->push(&_objectArrayKlassObj);
 228 
 229   it->push(&_the_empty_int_array);
 230   it->push(&_the_empty_short_array);
 231   it->push(&_the_empty_klass_array);
 232   it->push(&_the_empty_instance_klass_array);
 233   it->push(&_the_empty_method_array);
 234   it->push(&_the_array_interfaces_array);
 235 
 236   _finalizer_register_cache->metaspace_pointers_do(it);
 237   _loader_addClass_cache->metaspace_pointers_do(it);
 238   _throw_illegal_access_error_cache->metaspace_pointers_do(it);
 239   _throw_no_such_method_error_cache->metaspace_pointers_do(it);
 240   _do_stack_walk_cache->metaspace_pointers_do(it);
 241   _is_substitutable_cache->metaspace_pointers_do(it);
 242   _value_object_hash_code_cache->metaspace_pointers_do(it);
 243 }
 244 
 245 #if INCLUDE_CDS_JAVA_HEAP
 246 void Universe::set_archived_basic_type_mirror_index(BasicType t, int index) {
 247   assert(CDSConfig::is_dumping_heap(), "sanity");
 248   assert(!is_reference_type(t), "sanity");
 249   _archived_basic_type_mirror_indices[t] = index;
 250 }
 251 
 252 void Universe::update_archived_basic_type_mirrors() {
 253   if (ArchiveHeapLoader::is_in_use()) {
 254     for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
 255       int index = _archived_basic_type_mirror_indices[i];
 256       if (!is_reference_type((BasicType)i) && index >= 0) {
 257         oop mirror_oop = HeapShared::get_root(index);
 258         assert(mirror_oop != nullptr, "must be");
 259         _basic_type_mirrors[i] = OopHandle(vm_global(), mirror_oop);
 260       }
 261     }
 262   }

 274   }
 275 #endif
 276 
 277   f->do_ptr(&_fillerArrayKlassObj);
 278   for (int i = 0; i < T_LONG+1; i++) {
 279     f->do_ptr(&_typeArrayKlassObjs[i]);
 280   }
 281 
 282   f->do_ptr(&_objectArrayKlassObj);
 283   f->do_ptr(&_the_array_interfaces_array);
 284   f->do_ptr(&_the_empty_int_array);
 285   f->do_ptr(&_the_empty_short_array);
 286   f->do_ptr(&_the_empty_method_array);
 287   f->do_ptr(&_the_empty_klass_array);
 288   f->do_ptr(&_the_empty_instance_klass_array);
 289   _finalizer_register_cache->serialize(f);
 290   _loader_addClass_cache->serialize(f);
 291   _throw_illegal_access_error_cache->serialize(f);
 292   _throw_no_such_method_error_cache->serialize(f);
 293   _do_stack_walk_cache->serialize(f);
 294   _is_substitutable_cache->serialize(f);
 295   _value_object_hash_code_cache->serialize(f);
 296 }
 297 
 298 
 299 void Universe::check_alignment(uintx size, uintx alignment, const char* name) {
 300   if (size < alignment || size % alignment != 0) {
 301     vm_exit_during_initialization(
 302       err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment));
 303   }
 304 }
 305 
 306 void initialize_basic_type_klass(Klass* k, TRAPS) {
 307   Klass* ok = vmClasses::Object_klass();
 308 #if INCLUDE_CDS
 309   if (UseSharedSpaces) {
 310     ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
 311     assert(k->super() == ok, "u3");
 312     if (k->is_instance_klass()) {
 313       InstanceKlass::cast(k)->restore_unshareable_info(loader_data, Handle(), nullptr, CHECK);
 314     } else {
 315       ArrayKlass::cast(k)->restore_unshareable_info(loader_data, Handle(), CHECK);

 359     }
 360 
 361     vmSymbols::initialize();
 362 
 363     SystemDictionary::initialize(CHECK);
 364 
 365     // Create string constants
 366     oop s = StringTable::intern("null", CHECK);
 367     _the_null_string = OopHandle(vm_global(), s);
 368     s = StringTable::intern("-2147483648", CHECK);
 369     _the_min_jint_string = OopHandle(vm_global(), s);
 370 
 371 
 372 #if INCLUDE_CDS
 373     if (UseSharedSpaces) {
 374       // Verify shared interfaces array.
 375       assert(_the_array_interfaces_array->at(0) ==
 376              vmClasses::Cloneable_klass(), "u3");
 377       assert(_the_array_interfaces_array->at(1) ==
 378              vmClasses::Serializable_klass(), "u3");
 379 
 380     } else
 381 #endif
 382     {
 383       // Set up shared interfaces array.  (Do this before supers are set up.)
 384       _the_array_interfaces_array->at_put(0, vmClasses::Cloneable_klass());
 385       _the_array_interfaces_array->at_put(1, vmClasses::Serializable_klass());
 386     }
 387 
 388     initialize_basic_type_klass(_fillerArrayKlassObj, CHECK);
 389 
 390     initialize_basic_type_klass(boolArrayKlassObj(), CHECK);
 391     initialize_basic_type_klass(charArrayKlassObj(), CHECK);
 392     initialize_basic_type_klass(floatArrayKlassObj(), CHECK);
 393     initialize_basic_type_klass(doubleArrayKlassObj(), CHECK);
 394     initialize_basic_type_klass(byteArrayKlassObj(), CHECK);
 395     initialize_basic_type_klass(shortArrayKlassObj(), CHECK);
 396     initialize_basic_type_klass(intArrayKlassObj(), CHECK);
 397     initialize_basic_type_klass(longArrayKlassObj(), CHECK);
 398 
 399     assert(_fillerArrayKlassObj != intArrayKlassObj(),

 785   TraceTime timer("Genesis", TRACETIME_LOG(Info, startuptime));
 786 
 787   initialize_global_behaviours();
 788 
 789   GCLogPrecious::initialize();
 790 
 791 #ifdef _LP64
 792   MetaspaceShared::adjust_heap_sizes_for_dumping();
 793 #endif // _LP64
 794 
 795   GCConfig::arguments()->initialize_heap_sizes();
 796 
 797   jint status = Universe::initialize_heap();
 798   if (status != JNI_OK) {
 799     return status;
 800   }
 801 
 802   Universe::initialize_tlab();
 803 
 804   Metaspace::global_initialize();

 805   // Initialize performance counters for metaspaces
 806   MetaspaceCounters::initialize_performance_counters();
 807 
 808   // Checks 'AfterMemoryInit' constraints.
 809   if (!JVMFlagLimit::check_all_constraints(JVMFlagConstraintPhase::AfterMemoryInit)) {
 810     return JNI_EINVAL;
 811   }
 812 
 813   ClassLoaderData::init_null_class_loader_data();
 814 
 815   // We have a heap so create the Method* caches before
 816   // Metaspace::initialize_shared_spaces() tries to populate them.
 817   Universe::_finalizer_register_cache = new LatestMethodCache();
 818   Universe::_loader_addClass_cache    = new LatestMethodCache();
 819   Universe::_throw_illegal_access_error_cache = new LatestMethodCache();
 820   Universe::_throw_no_such_method_error_cache = new LatestMethodCache();
 821   Universe::_do_stack_walk_cache = new LatestMethodCache();
 822   Universe::_is_substitutable_cache = new LatestMethodCache();
 823   Universe::_value_object_hash_code_cache = new LatestMethodCache();
 824 
 825 #if INCLUDE_CDS
 826   DynamicArchive::check_for_dynamic_dump();
 827   if (UseSharedSpaces) {
 828     // Read the data structures supporting the shared spaces (shared
 829     // system dictionary, symbol table, etc.)
 830     MetaspaceShared::initialize_shared_spaces();
 831   }
 832   if (CDSConfig::is_dumping_archive()) {
 833     MetaspaceShared::prepare_for_dumping();
 834   }
 835 #endif
 836 
 837   SymbolTable::create_table();
 838   StringTable::create_table();
 839 
 840   if (strlen(VerifySubSet) > 0) {
 841     Universe::initialize_verify_flags();
 842   }
 843 

 960                           vmClasses::internal_Unsafe_klass(),
 961                           "throwIllegalAccessError",
 962                           vmSymbols::void_method_signature(), true, CHECK);
 963 
 964   initialize_known_method(_throw_no_such_method_error_cache,
 965                           vmClasses::internal_Unsafe_klass(),
 966                           "throwNoSuchMethodError",
 967                           vmSymbols::void_method_signature(), true, CHECK);
 968 
 969   // Set up method for registering loaded classes in class loader vector
 970   initialize_known_method(_loader_addClass_cache,
 971                           vmClasses::ClassLoader_klass(),
 972                           "addClass",
 973                           vmSymbols::class_void_signature(), false, CHECK);
 974 
 975   // Set up method for stack walking
 976   initialize_known_method(_do_stack_walk_cache,
 977                           vmClasses::AbstractStackWalker_klass(),
 978                           "doStackWalk",
 979                           vmSymbols::doStackWalk_signature(), false, CHECK);
 980 
 981   // Set up substitutability testing
 982   ResourceMark rm;
 983   initialize_known_method(_is_substitutable_cache,
 984                           vmClasses::ValueObjectMethods_klass(),
 985                           vmSymbols::isSubstitutable_name()->as_C_string(),
 986                           vmSymbols::object_object_boolean_signature(), true, CHECK);
 987   initialize_known_method(_value_object_hash_code_cache,
 988                           vmClasses::ValueObjectMethods_klass(),
 989                           vmSymbols::valueObjectHashCode_name()->as_C_string(),
 990                           vmSymbols::object_int_signature(), true, CHECK);
 991 }
 992 
 993 void universe2_init() {
 994   EXCEPTION_MARK;
 995   Universe::genesis(CATCH);
 996 }
 997 
 998 // Set after initialization of the module runtime, call_initModuleRuntime
 999 void universe_post_module_init() {
1000   Universe::_module_initialized = true;
1001 }
1002 
1003 bool universe_post_init() {
1004   assert(!is_init_completed(), "Error: initialization not yet completed!");
1005   Universe::_fully_initialized = true;
1006   EXCEPTION_MARK;
1007   if (!UseSharedSpaces) {
1008     reinitialize_vtables();
1009     reinitialize_itables();
1010   }
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