1 /* 2 * Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveUtils.hpp" 27 #include "cds/archiveBuilder.hpp" 28 #include "cds/classListParser.hpp" 29 #include "cds/classListWriter.hpp" 30 #include "cds/dynamicArchive.hpp" 31 #include "cds/filemap.hpp" 32 #include "cds/heapShared.hpp" 33 #include "cds/cdsProtectionDomain.hpp" 34 #include "cds/dumpTimeClassInfo.inline.hpp" 35 #include "cds/metaspaceShared.hpp" 36 #include "cds/runTimeClassInfo.hpp" 37 #include "classfile/classFileStream.hpp" 38 #include "classfile/classLoader.hpp" 39 #include "classfile/classLoaderData.inline.hpp" 40 #include "classfile/classLoaderDataGraph.hpp" 41 #include "classfile/classLoaderExt.hpp" 42 #include "classfile/dictionary.hpp" 43 #include "classfile/javaClasses.hpp" 44 #include "classfile/javaClasses.inline.hpp" 45 #include "classfile/symbolTable.hpp" 46 #include "classfile/systemDictionary.hpp" 47 #include "classfile/systemDictionaryShared.hpp" 48 #include "classfile/verificationType.hpp" 49 #include "classfile/vmClasses.hpp" 50 #include "classfile/vmSymbols.hpp" 51 #include "interpreter/bootstrapInfo.hpp" 52 #include "jfr/jfrEvents.hpp" 53 #include "logging/log.hpp" 54 #include "logging/logStream.hpp" 55 #include "memory/allocation.hpp" 56 #include "memory/metadataFactory.hpp" 57 #include "memory/metaspaceClosure.hpp" 58 #include "memory/oopFactory.hpp" 59 #include "memory/resourceArea.hpp" 60 #include "memory/universe.hpp" 61 #include "oops/compressedKlass.hpp" 62 #include "oops/instanceKlass.hpp" 63 #include "oops/klass.inline.hpp" 64 #include "oops/objArrayOop.inline.hpp" 65 #include "oops/oop.inline.hpp" 66 #include "oops/oopHandle.inline.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "runtime/arguments.hpp" 69 #include "runtime/handles.inline.hpp" 70 #include "runtime/java.hpp" 71 #include "runtime/javaCalls.hpp" 72 #include "runtime/mutexLocker.hpp" 73 #include "utilities/hashtable.inline.hpp" 74 #include "utilities/resourceHash.hpp" 75 #include "utilities/stringUtils.hpp" 76 77 DumpTimeSharedClassTable* SystemDictionaryShared::_dumptime_table = NULL; 78 DumpTimeSharedClassTable* SystemDictionaryShared::_cloned_dumptime_table = NULL; 79 DumpTimeLambdaProxyClassDictionary* SystemDictionaryShared::_dumptime_lambda_proxy_class_dictionary = NULL; 80 DumpTimeLambdaProxyClassDictionary* SystemDictionaryShared::_cloned_dumptime_lambda_proxy_class_dictionary = NULL; 81 // SystemDictionaries in the base layer static archive 82 RunTimeSharedDictionary SystemDictionaryShared::_builtin_dictionary; 83 RunTimeSharedDictionary SystemDictionaryShared::_unregistered_dictionary; 84 // SystemDictionaries in the top layer dynamic archive 85 RunTimeSharedDictionary SystemDictionaryShared::_dynamic_builtin_dictionary; 86 RunTimeSharedDictionary SystemDictionaryShared::_dynamic_unregistered_dictionary; 87 88 LambdaProxyClassDictionary SystemDictionaryShared::_lambda_proxy_class_dictionary; 89 LambdaProxyClassDictionary SystemDictionaryShared::_dynamic_lambda_proxy_class_dictionary; 90 91 DEBUG_ONLY(bool SystemDictionaryShared::_no_class_loading_should_happen = false;) 92 bool SystemDictionaryShared::_dump_in_progress = false; 93 94 InstanceKlass* SystemDictionaryShared::load_shared_class_for_builtin_loader( 95 Symbol* class_name, Handle class_loader, TRAPS) { 96 assert(UseSharedSpaces, "must be"); 97 InstanceKlass* ik = find_builtin_class(class_name); 98 99 if (ik != NULL && !ik->shared_loading_failed()) { 100 if ((SystemDictionary::is_system_class_loader(class_loader()) && ik->is_shared_app_class()) || 101 (SystemDictionary::is_platform_class_loader(class_loader()) && ik->is_shared_platform_class())) { 102 SharedClassLoadingMark slm(THREAD, ik); 103 PackageEntry* pkg_entry = CDSProtectionDomain::get_package_entry_from_class(ik, class_loader); 104 Handle protection_domain = 105 CDSProtectionDomain::init_security_info(class_loader, ik, pkg_entry, CHECK_NULL); 106 return load_shared_class(ik, class_loader, protection_domain, NULL, pkg_entry, THREAD); 107 } 108 } 109 return NULL; 110 } 111 112 // This function is called for loading only UNREGISTERED classes 113 InstanceKlass* SystemDictionaryShared::lookup_from_stream(Symbol* class_name, 114 Handle class_loader, 115 Handle protection_domain, 116 const ClassFileStream* cfs, 117 TRAPS) { 118 if (!UseSharedSpaces) { 119 return NULL; 120 } 121 if (class_name == NULL) { // don't do this for hidden classes 122 return NULL; 123 } 124 if (class_loader.is_null() || 125 SystemDictionary::is_system_class_loader(class_loader()) || 126 SystemDictionary::is_platform_class_loader(class_loader())) { 127 // Do nothing for the BUILTIN loaders. 128 return NULL; 129 } 130 131 const RunTimeClassInfo* record = find_record(&_unregistered_dictionary, &_dynamic_unregistered_dictionary, class_name); 132 if (record == NULL) { 133 return NULL; 134 } 135 136 int clsfile_size = cfs->length(); 137 int clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length()); 138 139 if (!record->matches(clsfile_size, clsfile_crc32)) { 140 return NULL; 141 } 142 143 return acquire_class_for_current_thread(record->_klass, class_loader, 144 protection_domain, cfs, 145 THREAD); 146 } 147 148 InstanceKlass* SystemDictionaryShared::acquire_class_for_current_thread( 149 InstanceKlass *ik, 150 Handle class_loader, 151 Handle protection_domain, 152 const ClassFileStream *cfs, 153 TRAPS) { 154 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader()); 155 156 { 157 MutexLocker mu(THREAD, SharedDictionary_lock); 158 if (ik->class_loader_data() != NULL) { 159 // ik is already loaded (by this loader or by a different loader) 160 // or ik is being loaded by a different thread (by this loader or by a different loader) 161 return NULL; 162 } 163 164 // No other thread has acquired this yet, so give it to *this thread* 165 ik->set_class_loader_data(loader_data); 166 } 167 168 // No longer holding SharedDictionary_lock 169 // No need to lock, as <ik> can be held only by a single thread. 170 loader_data->add_class(ik); 171 172 // Get the package entry. 173 PackageEntry* pkg_entry = CDSProtectionDomain::get_package_entry_from_class(ik, class_loader); 174 175 // Load and check super/interfaces, restore unshareable info 176 InstanceKlass* shared_klass = load_shared_class(ik, class_loader, protection_domain, 177 cfs, pkg_entry, THREAD); 178 if (shared_klass == NULL || HAS_PENDING_EXCEPTION) { 179 // TODO: clean up <ik> so it can be used again 180 return NULL; 181 } 182 183 return shared_klass; 184 } 185 186 void SystemDictionaryShared::start_dumping() { 187 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag); 188 _dump_in_progress = true; 189 } 190 191 void SystemDictionaryShared::stop_dumping() { 192 assert_lock_strong(DumpTimeTable_lock); 193 _dump_in_progress = false; 194 } 195 196 DumpTimeClassInfo* SystemDictionaryShared::find_or_allocate_info_for(InstanceKlass* k) { 197 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag); 198 return find_or_allocate_info_for_locked(k); 199 } 200 201 DumpTimeClassInfo* SystemDictionaryShared::find_or_allocate_info_for_locked(InstanceKlass* k) { 202 assert_lock_strong(DumpTimeTable_lock); 203 if (_dumptime_table == NULL) { 204 _dumptime_table = new (ResourceObj::C_HEAP, mtClass) DumpTimeSharedClassTable; 205 } 206 return _dumptime_table->find_or_allocate_info_for(k, _dump_in_progress); 207 } 208 209 bool SystemDictionaryShared::check_for_exclusion(InstanceKlass* k, DumpTimeClassInfo* info) { 210 if (MetaspaceShared::is_in_shared_metaspace(k)) { 211 // We have reached a super type that's already in the base archive. Treat it 212 // as "not excluded". 213 assert(DynamicDumpSharedSpaces, "must be"); 214 return false; 215 } 216 217 if (info == NULL) { 218 info = _dumptime_table->get(k); 219 assert(info != NULL, "supertypes of any classes in _dumptime_table must either be shared, or must also be in _dumptime_table"); 220 } 221 222 if (!info->has_checked_exclusion()) { 223 if (check_for_exclusion_impl(k)) { 224 info->set_excluded(); 225 } 226 info->set_has_checked_exclusion(); 227 } 228 229 return info->is_excluded(); 230 } 231 232 // Returns true so the caller can do: return warn_excluded("....."); 233 bool SystemDictionaryShared::warn_excluded(InstanceKlass* k, const char* reason) { 234 ResourceMark rm; 235 log_warning(cds)("Skipping %s: %s", k->name()->as_C_string(), reason); 236 return true; 237 } 238 239 bool SystemDictionaryShared::is_jfr_event_class(InstanceKlass *k) { 240 while (k) { 241 if (k->name()->equals("jdk/internal/event/Event")) { 242 return true; 243 } 244 k = k->java_super(); 245 } 246 return false; 247 } 248 249 bool SystemDictionaryShared::is_registered_lambda_proxy_class(InstanceKlass* ik) { 250 DumpTimeClassInfo* info = _dumptime_table->get(ik); 251 return (info != NULL) ? info->_is_archived_lambda_proxy : false; 252 } 253 254 void SystemDictionaryShared::reset_registered_lambda_proxy_class(InstanceKlass* ik) { 255 DumpTimeClassInfo* info = _dumptime_table->get(ik); 256 if (info != NULL) { 257 info->_is_archived_lambda_proxy = false; 258 info->set_excluded(); 259 } 260 } 261 262 bool SystemDictionaryShared::is_early_klass(InstanceKlass* ik) { 263 DumpTimeClassInfo* info = _dumptime_table->get(ik); 264 return (info != NULL) ? info->is_early_klass() : false; 265 } 266 267 bool SystemDictionaryShared::is_hidden_lambda_proxy(InstanceKlass* ik) { 268 assert(ik->is_shared(), "applicable to only a shared class"); 269 if (ik->is_hidden()) { 270 return true; 271 } else { 272 return false; 273 } 274 } 275 276 bool SystemDictionaryShared::check_for_exclusion_impl(InstanceKlass* k) { 277 if (k->is_in_error_state()) { 278 return warn_excluded(k, "In error state"); 279 } 280 if (k->is_scratch_class()) { 281 return warn_excluded(k, "A scratch class"); 282 } 283 if (!k->is_loaded()) { 284 return warn_excluded(k, "Not in loaded state"); 285 } 286 if (has_been_redefined(k)) { 287 return warn_excluded(k, "Has been redefined"); 288 } 289 if (!k->is_hidden() && k->shared_classpath_index() < 0 && is_builtin(k)) { 290 // These are classes loaded from unsupported locations (such as those loaded by JVMTI native 291 // agent during dump time). 292 return warn_excluded(k, "Unsupported location"); 293 } 294 if (k->signers() != NULL) { 295 // We cannot include signed classes in the archive because the certificates 296 // used during dump time may be different than those used during 297 // runtime (due to expiration, etc). 298 return warn_excluded(k, "Signed JAR"); 299 } 300 if (is_jfr_event_class(k)) { 301 // We cannot include JFR event classes because they need runtime-specific 302 // instrumentation in order to work with -XX:FlightRecorderOptions:retransform=false. 303 // There are only a small number of these classes, so it's not worthwhile to 304 // support them and make CDS more complicated. 305 return warn_excluded(k, "JFR event class"); 306 } 307 308 if (!k->is_linked()) { 309 if (has_class_failed_verification(k)) { 310 return warn_excluded(k, "Failed verification"); 311 } 312 } else { 313 if (!k->can_be_verified_at_dumptime()) { 314 // We have an old class that has been linked (e.g., it's been executed during 315 // dump time). This class has been verified using the old verifier, which 316 // doesn't save the verification constraints, so check_verification_constraints() 317 // won't work at runtime. 318 // As a result, we cannot store this class. It must be loaded and fully verified 319 // at runtime. 320 return warn_excluded(k, "Old class has been linked"); 321 } 322 } 323 324 if (k->is_hidden() && !is_registered_lambda_proxy_class(k)) { 325 ResourceMark rm; 326 log_debug(cds)("Skipping %s: Hidden class", k->name()->as_C_string()); 327 return true; 328 } 329 330 InstanceKlass* super = k->java_super(); 331 if (super != NULL && check_for_exclusion(super, NULL)) { 332 ResourceMark rm; 333 log_warning(cds)("Skipping %s: super class %s is excluded", k->name()->as_C_string(), super->name()->as_C_string()); 334 return true; 335 } 336 337 Array<InstanceKlass*>* interfaces = k->local_interfaces(); 338 int len = interfaces->length(); 339 for (int i = 0; i < len; i++) { 340 InstanceKlass* intf = interfaces->at(i); 341 if (check_for_exclusion(intf, NULL)) { 342 ResourceMark rm; 343 log_warning(cds)("Skipping %s: interface %s is excluded", k->name()->as_C_string(), intf->name()->as_C_string()); 344 return true; 345 } 346 } 347 348 return false; // false == k should NOT be excluded 349 } 350 351 bool SystemDictionaryShared::is_builtin_loader(ClassLoaderData* loader_data) { 352 oop class_loader = loader_data->class_loader(); 353 return (class_loader == NULL || 354 SystemDictionary::is_system_class_loader(class_loader) || 355 SystemDictionary::is_platform_class_loader(class_loader)); 356 } 357 358 bool SystemDictionaryShared::has_platform_or_app_classes() { 359 if (FileMapInfo::current_info()->has_platform_or_app_classes()) { 360 return true; 361 } 362 if (DynamicArchive::is_mapped() && 363 FileMapInfo::dynamic_info()->has_platform_or_app_classes()) { 364 return true; 365 } 366 return false; 367 } 368 369 // The following stack shows how this code is reached: 370 // 371 // [0] SystemDictionaryShared::find_or_load_shared_class() 372 // [1] JVM_FindLoadedClass 373 // [2] java.lang.ClassLoader.findLoadedClass0() 374 // [3] java.lang.ClassLoader.findLoadedClass() 375 // [4] jdk.internal.loader.BuiltinClassLoader.loadClassOrNull() 376 // [5] jdk.internal.loader.BuiltinClassLoader.loadClass() 377 // [6] jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(), or 378 // jdk.internal.loader.ClassLoaders$PlatformClassLoader.loadClass() 379 // 380 // AppCDS supports fast class loading for these 2 built-in class loaders: 381 // jdk.internal.loader.ClassLoaders$PlatformClassLoader 382 // jdk.internal.loader.ClassLoaders$AppClassLoader 383 // with the following assumptions (based on the JDK core library source code): 384 // 385 // [a] these two loaders use the BuiltinClassLoader.loadClassOrNull() to 386 // load the named class. 387 // [b] BuiltinClassLoader.loadClassOrNull() first calls findLoadedClass(name). 388 // [c] At this point, if we can find the named class inside the 389 // shared_dictionary, we can perform further checks (see 390 // SystemDictionary::is_shared_class_visible) to ensure that this class 391 // was loaded by the same class loader during dump time. 392 // 393 // Given these assumptions, we intercept the findLoadedClass() call to invoke 394 // SystemDictionaryShared::find_or_load_shared_class() to load the shared class from 395 // the archive for the 2 built-in class loaders. This way, 396 // we can improve start-up because we avoid decoding the classfile, 397 // and avoid delegating to the parent loader. 398 // 399 // NOTE: there's a lot of assumption about the Java code. If any of that change, this 400 // needs to be redesigned. 401 402 InstanceKlass* SystemDictionaryShared::find_or_load_shared_class( 403 Symbol* name, Handle class_loader, TRAPS) { 404 InstanceKlass* k = NULL; 405 if (UseSharedSpaces) { 406 if (!has_platform_or_app_classes()) { 407 return NULL; 408 } 409 410 if (SystemDictionary::is_system_class_loader(class_loader()) || 411 SystemDictionary::is_platform_class_loader(class_loader())) { 412 // Fix for 4474172; see evaluation for more details 413 class_loader = Handle( 414 THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader())); 415 ClassLoaderData *loader_data = register_loader(class_loader); 416 Dictionary* dictionary = loader_data->dictionary(); 417 unsigned int d_hash = dictionary->compute_hash(name); 418 419 // Note: currently, find_or_load_shared_class is called only from 420 // JVM_FindLoadedClass and used for PlatformClassLoader and AppClassLoader, 421 // which are parallel-capable loaders, so a lock here is NOT taken. 422 assert(get_loader_lock_or_null(class_loader) == NULL, "ObjectLocker not required"); 423 { 424 MutexLocker mu(THREAD, SystemDictionary_lock); 425 InstanceKlass* check = dictionary->find_class(d_hash, name); 426 if (check != NULL) { 427 return check; 428 } 429 } 430 431 k = load_shared_class_for_builtin_loader(name, class_loader, THREAD); 432 if (k != NULL) { 433 SharedClassLoadingMark slm(THREAD, k); 434 k = find_or_define_instance_class(name, class_loader, k, CHECK_NULL); 435 } 436 } 437 } 438 return k; 439 } 440 441 class UnregisteredClassesTable : public ResourceHashtable< 442 Symbol*, InstanceKlass*, 443 15889, // prime number 444 ResourceObj::C_HEAP> {}; 445 446 static UnregisteredClassesTable* _unregistered_classes_table = NULL; 447 448 // true == class was successfully added; false == a duplicated class (with the same name) already exists. 449 bool SystemDictionaryShared::add_unregistered_class(Thread* current, InstanceKlass* klass) { 450 // We don't allow duplicated unregistered classes with the same name. 451 // We only archive the first class with that name that succeeds putting 452 // itself into the table. 453 assert(Arguments::is_dumping_archive() || ClassListWriter::is_enabled(), "sanity"); 454 MutexLocker ml(current, UnregisteredClassesTable_lock); 455 Symbol* name = klass->name(); 456 if (_unregistered_classes_table == NULL) { 457 _unregistered_classes_table = new (ResourceObj::C_HEAP, mtClass)UnregisteredClassesTable(); 458 } 459 bool created; 460 InstanceKlass** v = _unregistered_classes_table->put_if_absent(name, klass, &created); 461 if (created) { 462 name->increment_refcount(); 463 } 464 return (klass == *v); 465 } 466 467 // This function is called to lookup the super/interfaces of shared classes for 468 // unregistered loaders. E.g., SharedClass in the below example 469 // where "super:" (and optionally "interface:") have been specified. 470 // 471 // java/lang/Object id: 0 472 // Interface id: 2 super: 0 source: cust.jar 473 // SharedClass id: 4 super: 0 interfaces: 2 source: cust.jar 474 InstanceKlass* SystemDictionaryShared::lookup_super_for_unregistered_class( 475 Symbol* class_name, Symbol* super_name, bool is_superclass) { 476 477 assert(DumpSharedSpaces, "only when static dumping"); 478 479 if (!ClassListParser::is_parsing_thread()) { 480 // Unregistered classes can be created only by ClassListParser::_parsing_thread. 481 482 return NULL; 483 } 484 485 ClassListParser* parser = ClassListParser::instance(); 486 if (parser == NULL) { 487 // We're still loading the well-known classes, before the ClassListParser is created. 488 return NULL; 489 } 490 if (class_name->equals(parser->current_class_name())) { 491 // When this function is called, all the numbered super and interface types 492 // must have already been loaded. Hence this function is never recursively called. 493 if (is_superclass) { 494 return parser->lookup_super_for_current_class(super_name); 495 } else { 496 return parser->lookup_interface_for_current_class(super_name); 497 } 498 } else { 499 // The VM is not trying to resolve a super type of parser->current_class_name(). 500 // Instead, it's resolving an error class (because parser->current_class_name() has 501 // failed parsing or verification). Don't do anything here. 502 return NULL; 503 } 504 } 505 506 void SystemDictionaryShared::set_shared_class_misc_info(InstanceKlass* k, ClassFileStream* cfs) { 507 Arguments::assert_is_dumping_archive(); 508 assert(!is_builtin(k), "must be unregistered class"); 509 DumpTimeClassInfo* info = find_or_allocate_info_for(k); 510 if (info != NULL) { 511 info->_clsfile_size = cfs->length(); 512 info->_clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length()); 513 } 514 } 515 516 void SystemDictionaryShared::init_dumptime_info(InstanceKlass* k) { 517 (void)find_or_allocate_info_for(k); 518 } 519 520 void SystemDictionaryShared::remove_dumptime_info(InstanceKlass* k) { 521 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag); 522 DumpTimeClassInfo* p = _dumptime_table->get(k); 523 if (p == NULL) { 524 return; 525 } 526 if (p->_verifier_constraints != NULL) { 527 for (int i = 0; i < p->_verifier_constraints->length(); i++) { 528 DumpTimeClassInfo::DTVerifierConstraint constraint = p->_verifier_constraints->at(i); 529 if (constraint._name != NULL ) { 530 constraint._name->decrement_refcount(); 531 } 532 if (constraint._from_name != NULL ) { 533 constraint._from_name->decrement_refcount(); 534 } 535 } 536 FREE_C_HEAP_ARRAY(DumpTimeClassInfo::DTVerifierConstraint, p->_verifier_constraints); 537 p->_verifier_constraints = NULL; 538 FREE_C_HEAP_ARRAY(char, p->_verifier_constraint_flags); 539 p->_verifier_constraint_flags = NULL; 540 } 541 if (p->_loader_constraints != NULL) { 542 for (int i = 0; i < p->_loader_constraints->length(); i++) { 543 DumpTimeClassInfo::DTLoaderConstraint ld = p->_loader_constraints->at(i); 544 if (ld._name != NULL) { 545 ld._name->decrement_refcount(); 546 } 547 } 548 FREE_C_HEAP_ARRAY(DumpTimeClassInfo::DTLoaderConstraint, p->_loader_constraints); 549 p->_loader_constraints = NULL; 550 } 551 _dumptime_table->remove(k); 552 } 553 554 void SystemDictionaryShared::handle_class_unloading(InstanceKlass* klass) { 555 if (Arguments::is_dumping_archive()) { 556 remove_dumptime_info(klass); 557 } 558 559 if (_unregistered_classes_table != NULL) { 560 // Remove the class from _unregistered_classes_table: keep the entry but 561 // set it to NULL. This ensure no classes with the same name can be 562 // added again. 563 MutexLocker ml(Thread::current(), UnregisteredClassesTable_lock); 564 InstanceKlass** v = _unregistered_classes_table->get(klass->name()); 565 if (v != NULL) { 566 *v = NULL; 567 } 568 } 569 570 if (ClassListWriter::is_enabled()) { 571 ClassListWriter cw; 572 cw.handle_class_unloading((const InstanceKlass*)klass); 573 } 574 } 575 576 // Check if a class or any of its supertypes has been redefined. 577 bool SystemDictionaryShared::has_been_redefined(InstanceKlass* k) { 578 if (k->has_been_redefined()) { 579 return true; 580 } 581 if (k->java_super() != NULL && has_been_redefined(k->java_super())) { 582 return true; 583 } 584 Array<InstanceKlass*>* interfaces = k->local_interfaces(); 585 int len = interfaces->length(); 586 for (int i = 0; i < len; i++) { 587 if (has_been_redefined(interfaces->at(i))) { 588 return true; 589 } 590 } 591 return false; 592 } 593 594 // k is a class before relocating by ArchiveBuilder 595 void SystemDictionaryShared::validate_before_archiving(InstanceKlass* k) { 596 ResourceMark rm; 597 const char* name = k->name()->as_C_string(); 598 DumpTimeClassInfo* info = _dumptime_table->get(k); 599 assert(_no_class_loading_should_happen, "class loading must be disabled"); 600 guarantee(info != NULL, "Class %s must be entered into _dumptime_table", name); 601 guarantee(!info->is_excluded(), "Should not attempt to archive excluded class %s", name); 602 if (is_builtin(k)) { 603 if (k->is_hidden()) { 604 assert(is_registered_lambda_proxy_class(k), "unexpected hidden class %s", name); 605 } 606 guarantee(!k->is_shared_unregistered_class(), 607 "Class loader type must be set for BUILTIN class %s", name); 608 609 } else { 610 guarantee(k->is_shared_unregistered_class(), 611 "Class loader type must not be set for UNREGISTERED class %s", name); 612 } 613 } 614 615 class UnregisteredClassesDuplicationChecker : StackObj { 616 GrowableArray<InstanceKlass*> _list; 617 Thread* _thread; 618 public: 619 UnregisteredClassesDuplicationChecker() : _thread(Thread::current()) {} 620 621 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) { 622 if (!SystemDictionaryShared::is_builtin(k)) { 623 _list.append(k); 624 } 625 return true; // keep on iterating 626 } 627 628 static int compare_by_loader(InstanceKlass** a, InstanceKlass** b) { 629 ClassLoaderData* loader_a = a[0]->class_loader_data(); 630 ClassLoaderData* loader_b = b[0]->class_loader_data(); 631 632 if (loader_a != loader_b) { 633 return intx(loader_a) - intx(loader_b); 634 } else { 635 return intx(a[0]) - intx(b[0]); 636 } 637 } 638 639 void mark_duplicated_classes() { 640 // Two loaders may load two identical or similar hierarchies of classes. If we 641 // check for duplication in random order, we may end up excluding important base classes 642 // in both hierarchies, causing most of the classes to be excluded. 643 // We sort the classes by their loaders. This way we're likely to archive 644 // all classes in the one of the two hierarchies. 645 _list.sort(compare_by_loader); 646 for (int i = 0; i < _list.length(); i++) { 647 InstanceKlass* k = _list.at(i); 648 bool i_am_first = SystemDictionaryShared::add_unregistered_class(_thread, k); 649 if (!i_am_first) { 650 SystemDictionaryShared::warn_excluded(k, "Duplicated unregistered class"); 651 SystemDictionaryShared::set_excluded_locked(k); 652 } 653 } 654 } 655 }; 656 657 class ExcludeDumpTimeSharedClasses : StackObj { 658 public: 659 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) { 660 SystemDictionaryShared::check_for_exclusion(k, &info); 661 return true; // keep on iterating 662 } 663 }; 664 665 void SystemDictionaryShared::check_excluded_classes() { 666 assert(no_class_loading_should_happen(), "sanity"); 667 assert_lock_strong(DumpTimeTable_lock); 668 669 if (DynamicDumpSharedSpaces) { 670 // Do this first -- if a base class is excluded due to duplication, 671 // all of its subclasses will also be excluded by ExcludeDumpTimeSharedClasses 672 ResourceMark rm; 673 UnregisteredClassesDuplicationChecker dup_checker; 674 _dumptime_table->iterate(&dup_checker); 675 dup_checker.mark_duplicated_classes(); 676 } 677 678 ExcludeDumpTimeSharedClasses excl; 679 _dumptime_table->iterate(&excl); 680 _dumptime_table->update_counts(); 681 682 cleanup_lambda_proxy_class_dictionary(); 683 } 684 685 bool SystemDictionaryShared::is_excluded_class(InstanceKlass* k) { 686 assert(_no_class_loading_should_happen, "sanity"); 687 assert_lock_strong(DumpTimeTable_lock); 688 Arguments::assert_is_dumping_archive(); 689 DumpTimeClassInfo* p = find_or_allocate_info_for_locked(k); 690 return (p == NULL) ? true : p->is_excluded(); 691 } 692 693 void SystemDictionaryShared::set_excluded_locked(InstanceKlass* k) { 694 assert_lock_strong(DumpTimeTable_lock); 695 Arguments::assert_is_dumping_archive(); 696 DumpTimeClassInfo* info = find_or_allocate_info_for_locked(k); 697 if (info != NULL) { 698 info->set_excluded(); 699 } 700 } 701 702 void SystemDictionaryShared::set_excluded(InstanceKlass* k) { 703 Arguments::assert_is_dumping_archive(); 704 DumpTimeClassInfo* info = find_or_allocate_info_for(k); 705 if (info != NULL) { 706 info->set_excluded(); 707 } 708 } 709 710 void SystemDictionaryShared::set_class_has_failed_verification(InstanceKlass* ik) { 711 Arguments::assert_is_dumping_archive(); 712 DumpTimeClassInfo* p = find_or_allocate_info_for(ik); 713 if (p != NULL) { 714 p->set_failed_verification(); 715 } 716 } 717 718 bool SystemDictionaryShared::has_class_failed_verification(InstanceKlass* ik) { 719 Arguments::assert_is_dumping_archive(); 720 if (_dumptime_table == NULL) { 721 assert(DynamicDumpSharedSpaces, "sanity"); 722 assert(ik->is_shared(), "must be a shared class in the static archive"); 723 return false; 724 } 725 DumpTimeClassInfo* p = _dumptime_table->get(ik); 726 return (p == NULL) ? false : p->failed_verification(); 727 } 728 729 class IterateDumpTimeSharedClassTable : StackObj { 730 MetaspaceClosure *_it; 731 public: 732 IterateDumpTimeSharedClassTable(MetaspaceClosure* it) : _it(it) {} 733 734 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) { 735 assert_lock_strong(DumpTimeTable_lock); 736 if (k->is_loader_alive() && !info.is_excluded()) { 737 info.metaspace_pointers_do(_it); 738 } 739 return true; // keep on iterating 740 } 741 }; 742 743 class IterateDumpTimeLambdaProxyClassDictionary : StackObj { 744 MetaspaceClosure *_it; 745 public: 746 IterateDumpTimeLambdaProxyClassDictionary(MetaspaceClosure* it) : _it(it) {} 747 748 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) { 749 assert_lock_strong(DumpTimeTable_lock); 750 if (key.caller_ik()->is_loader_alive()) { 751 info.metaspace_pointers_do(_it); 752 key.metaspace_pointers_do(_it); 753 } 754 return true; // keep on iterating 755 } 756 }; 757 758 void SystemDictionaryShared::dumptime_classes_do(class MetaspaceClosure* it) { 759 assert_lock_strong(DumpTimeTable_lock); 760 IterateDumpTimeSharedClassTable iter(it); 761 _dumptime_table->iterate(&iter); 762 if (_dumptime_lambda_proxy_class_dictionary != NULL) { 763 IterateDumpTimeLambdaProxyClassDictionary iter_lambda(it); 764 _dumptime_lambda_proxy_class_dictionary->iterate(&iter_lambda); 765 } 766 } 767 768 bool SystemDictionaryShared::add_verification_constraint(InstanceKlass* k, Symbol* name, 769 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) { 770 Arguments::assert_is_dumping_archive(); 771 DumpTimeClassInfo* info = find_or_allocate_info_for(k); 772 if (info != NULL) { 773 info->add_verification_constraint(k, name, from_name, from_field_is_protected, 774 from_is_array, from_is_object); 775 } else { 776 return true; 777 } 778 if (DynamicDumpSharedSpaces) { 779 // For dynamic dumping, we can resolve all the constraint classes for all class loaders during 780 // the initial run prior to creating the archive before vm exit. We will also perform verification 781 // check when running with the archive. 782 return false; 783 } else { 784 if (is_builtin(k)) { 785 // For builtin class loaders, we can try to complete the verification check at dump time, 786 // because we can resolve all the constraint classes. We will also perform verification check 787 // when running with the archive. 788 return false; 789 } else { 790 // For non-builtin class loaders, we cannot complete the verification check at dump time, 791 // because at dump time we don't know how to resolve classes for such loaders. 792 return true; 793 } 794 } 795 } 796 797 void SystemDictionaryShared::add_enum_klass_static_field(InstanceKlass* ik, int root_index) { 798 assert(DumpSharedSpaces, "static dump only"); 799 DumpTimeClassInfo* info = SystemDictionaryShared::find_or_allocate_info_for_locked(ik); 800 assert(info != NULL, "must be"); 801 info->add_enum_klass_static_field(root_index); 802 } 803 804 void SystemDictionaryShared::add_to_dump_time_lambda_proxy_class_dictionary(LambdaProxyClassKey& key, 805 InstanceKlass* proxy_klass) { 806 assert_lock_strong(DumpTimeTable_lock); 807 if (_dumptime_lambda_proxy_class_dictionary == NULL) { 808 _dumptime_lambda_proxy_class_dictionary = 809 new (ResourceObj::C_HEAP, mtClass) DumpTimeLambdaProxyClassDictionary; 810 } 811 DumpTimeLambdaProxyClassInfo* lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key); 812 if (lambda_info == NULL) { 813 DumpTimeLambdaProxyClassInfo info; 814 info.add_proxy_klass(proxy_klass); 815 _dumptime_lambda_proxy_class_dictionary->put(key, info); 816 //lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key); 817 //assert(lambda_info->_proxy_klass == proxy_klass, "must be"); // debug only -- remove 818 ++_dumptime_lambda_proxy_class_dictionary->_count; 819 } else { 820 lambda_info->add_proxy_klass(proxy_klass); 821 } 822 } 823 824 void SystemDictionaryShared::add_lambda_proxy_class(InstanceKlass* caller_ik, 825 InstanceKlass* lambda_ik, 826 Symbol* invoked_name, 827 Symbol* invoked_type, 828 Symbol* method_type, 829 Method* member_method, 830 Symbol* instantiated_method_type, 831 TRAPS) { 832 833 assert(caller_ik->class_loader() == lambda_ik->class_loader(), "mismatched class loader"); 834 assert(caller_ik->class_loader_data() == lambda_ik->class_loader_data(), "mismatched class loader data"); 835 assert(java_lang_Class::class_data(lambda_ik->java_mirror()) == NULL, "must not have class data"); 836 837 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag); 838 839 lambda_ik->assign_class_loader_type(); 840 lambda_ik->set_shared_classpath_index(caller_ik->shared_classpath_index()); 841 InstanceKlass* nest_host = caller_ik->nest_host(CHECK); 842 assert(nest_host != NULL, "unexpected NULL nest_host"); 843 844 DumpTimeClassInfo* info = _dumptime_table->get(lambda_ik); 845 if (info != NULL && !lambda_ik->is_non_strong_hidden() && is_builtin(lambda_ik) && is_builtin(caller_ik) 846 // Don't include the lambda proxy if its nest host is not in the "linked" state. 847 && nest_host->is_linked()) { 848 // Set _is_archived_lambda_proxy in DumpTimeClassInfo so that the lambda_ik 849 // won't be excluded during dumping of shared archive. See ExcludeDumpTimeSharedClasses. 850 info->_is_archived_lambda_proxy = true; 851 info->set_nest_host(nest_host); 852 853 LambdaProxyClassKey key(caller_ik, 854 invoked_name, 855 invoked_type, 856 method_type, 857 member_method, 858 instantiated_method_type); 859 add_to_dump_time_lambda_proxy_class_dictionary(key, lambda_ik); 860 } 861 } 862 863 InstanceKlass* SystemDictionaryShared::get_shared_lambda_proxy_class(InstanceKlass* caller_ik, 864 Symbol* invoked_name, 865 Symbol* invoked_type, 866 Symbol* method_type, 867 Method* member_method, 868 Symbol* instantiated_method_type) { 869 MutexLocker ml(CDSLambda_lock, Mutex::_no_safepoint_check_flag); 870 LambdaProxyClassKey key(caller_ik, invoked_name, invoked_type, 871 method_type, member_method, instantiated_method_type); 872 const RunTimeLambdaProxyClassInfo* info = _lambda_proxy_class_dictionary.lookup(&key, key.hash(), 0); 873 if (info == NULL) { 874 // Try lookup from the dynamic lambda proxy class dictionary. 875 info = _dynamic_lambda_proxy_class_dictionary.lookup(&key, key.hash(), 0); 876 } 877 InstanceKlass* proxy_klass = NULL; 878 if (info != NULL) { 879 InstanceKlass* curr_klass = info->proxy_klass_head(); 880 InstanceKlass* prev_klass = curr_klass; 881 if (curr_klass->lambda_proxy_is_available()) { 882 while (curr_klass->next_link() != NULL) { 883 prev_klass = curr_klass; 884 curr_klass = InstanceKlass::cast(curr_klass->next_link()); 885 } 886 assert(curr_klass->is_hidden(), "must be"); 887 assert(curr_klass->lambda_proxy_is_available(), "must be"); 888 889 prev_klass->set_next_link(NULL); 890 proxy_klass = curr_klass; 891 proxy_klass->clear_lambda_proxy_is_available(); 892 if (log_is_enabled(Debug, cds)) { 893 ResourceMark rm; 894 log_debug(cds)("Loaded lambda proxy: %s ", proxy_klass->external_name()); 895 } 896 } else { 897 if (log_is_enabled(Debug, cds)) { 898 ResourceMark rm; 899 log_debug(cds)("Used all archived lambda proxy classes for: %s %s%s", 900 caller_ik->external_name(), invoked_name->as_C_string(), invoked_type->as_C_string()); 901 } 902 } 903 } 904 return proxy_klass; 905 } 906 907 InstanceKlass* SystemDictionaryShared::get_shared_nest_host(InstanceKlass* lambda_ik) { 908 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only"); 909 RunTimeClassInfo* record = RunTimeClassInfo::get_for(lambda_ik); 910 return record->nest_host(); 911 } 912 913 InstanceKlass* SystemDictionaryShared::prepare_shared_lambda_proxy_class(InstanceKlass* lambda_ik, 914 InstanceKlass* caller_ik, TRAPS) { 915 Handle class_loader(THREAD, caller_ik->class_loader()); 916 Handle protection_domain; 917 PackageEntry* pkg_entry = caller_ik->package(); 918 if (caller_ik->class_loader() != NULL) { 919 protection_domain = CDSProtectionDomain::init_security_info(class_loader, caller_ik, pkg_entry, CHECK_NULL); 920 } 921 922 InstanceKlass* shared_nest_host = get_shared_nest_host(lambda_ik); 923 assert(shared_nest_host != NULL, "unexpected NULL _nest_host"); 924 925 InstanceKlass* loaded_lambda = 926 SystemDictionary::load_shared_lambda_proxy_class(lambda_ik, class_loader, protection_domain, pkg_entry, CHECK_NULL); 927 928 if (loaded_lambda == NULL) { 929 return NULL; 930 } 931 932 // Ensures the nest host is the same as the lambda proxy's 933 // nest host recorded at dump time. 934 InstanceKlass* nest_host = caller_ik->nest_host(THREAD); 935 assert(nest_host == shared_nest_host, "mismatched nest host"); 936 937 EventClassLoad class_load_start_event; 938 { 939 MutexLocker mu_r(THREAD, Compile_lock); 940 941 // Add to class hierarchy, and do possible deoptimizations. 942 SystemDictionary::add_to_hierarchy(loaded_lambda); 943 // But, do not add to dictionary. 944 } 945 loaded_lambda->link_class(CHECK_NULL); 946 // notify jvmti 947 if (JvmtiExport::should_post_class_load()) { 948 JvmtiExport::post_class_load(THREAD, loaded_lambda); 949 } 950 if (class_load_start_event.should_commit()) { 951 SystemDictionary::post_class_load_event(&class_load_start_event, loaded_lambda, ClassLoaderData::class_loader_data(class_loader())); 952 } 953 954 loaded_lambda->initialize(CHECK_NULL); 955 956 return loaded_lambda; 957 } 958 959 void SystemDictionaryShared::check_verification_constraints(InstanceKlass* klass, 960 TRAPS) { 961 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only"); 962 RunTimeClassInfo* record = RunTimeClassInfo::get_for(klass); 963 964 int length = record->_num_verifier_constraints; 965 if (length > 0) { 966 for (int i = 0; i < length; i++) { 967 RunTimeClassInfo::RTVerifierConstraint* vc = record->verifier_constraint_at(i); 968 Symbol* name = vc->name(); 969 Symbol* from_name = vc->from_name(); 970 char c = record->verifier_constraint_flag(i); 971 972 if (log_is_enabled(Trace, cds, verification)) { 973 ResourceMark rm(THREAD); 974 log_trace(cds, verification)("check_verification_constraint: %s: %s must be subclass of %s [0x%x]", 975 klass->external_name(), from_name->as_klass_external_name(), 976 name->as_klass_external_name(), c); 977 } 978 979 bool from_field_is_protected = (c & SystemDictionaryShared::FROM_FIELD_IS_PROTECTED) ? true : false; 980 bool from_is_array = (c & SystemDictionaryShared::FROM_IS_ARRAY) ? true : false; 981 bool from_is_object = (c & SystemDictionaryShared::FROM_IS_OBJECT) ? true : false; 982 983 bool ok = VerificationType::resolve_and_check_assignability(klass, name, 984 from_name, from_field_is_protected, from_is_array, from_is_object, CHECK); 985 if (!ok) { 986 ResourceMark rm(THREAD); 987 stringStream ss; 988 989 ss.print_cr("Bad type on operand stack"); 990 ss.print_cr("Exception Details:"); 991 ss.print_cr(" Location:\n %s", klass->name()->as_C_string()); 992 ss.print_cr(" Reason:\n Type '%s' is not assignable to '%s'", 993 from_name->as_quoted_ascii(), name->as_quoted_ascii()); 994 THROW_MSG(vmSymbols::java_lang_VerifyError(), ss.as_string()); 995 } 996 } 997 } 998 } 999 1000 static oop get_class_loader_by(char type) { 1001 if (type == (char)ClassLoader::BOOT_LOADER) { 1002 return (oop)NULL; 1003 } else if (type == (char)ClassLoader::PLATFORM_LOADER) { 1004 return SystemDictionary::java_platform_loader(); 1005 } else { 1006 assert (type == (char)ClassLoader::APP_LOADER, "Sanity"); 1007 return SystemDictionary::java_system_loader(); 1008 } 1009 } 1010 1011 // Record class loader constraints that are checked inside 1012 // InstanceKlass::link_class(), so that these can be checked quickly 1013 // at runtime without laying out the vtable/itables. 1014 void SystemDictionaryShared::record_linking_constraint(Symbol* name, InstanceKlass* klass, 1015 Handle loader1, Handle loader2) { 1016 // A linking constraint check is executed when: 1017 // - klass extends or implements type S 1018 // - klass overrides method S.M(...) with X.M 1019 // - If klass defines the method M, X is 1020 // the same as klass. 1021 // - If klass does not define the method M, 1022 // X must be a supertype of klass and X.M is 1023 // a default method defined by X. 1024 // - loader1 = X->class_loader() 1025 // - loader2 = S->class_loader() 1026 // - loader1 != loader2 1027 // - M's parameter(s) include an object type T 1028 // We require that 1029 // - whenever loader1 and loader2 try to 1030 // resolve the type T, they must always resolve to 1031 // the same InstanceKlass. 1032 // NOTE: type T may or may not be currently resolved in 1033 // either of these two loaders. The check itself does not 1034 // try to resolve T. 1035 oop klass_loader = klass->class_loader(); 1036 1037 if (!is_system_class_loader(klass_loader) && 1038 !is_platform_class_loader(klass_loader)) { 1039 // If klass is loaded by system/platform loaders, we can 1040 // guarantee that klass and S must be loaded by the same 1041 // respective loader between dump time and run time, and 1042 // the exact same check on (name, loader1, loader2) will 1043 // be executed. Hence, we can cache this check and execute 1044 // it at runtime without walking the vtable/itables. 1045 // 1046 // This cannot be guaranteed for classes loaded by other 1047 // loaders, so we bail. 1048 return; 1049 } 1050 1051 assert(is_builtin(klass), "must be"); 1052 assert(klass_loader != NULL, "should not be called for boot loader"); 1053 assert(loader1 != loader2, "must be"); 1054 1055 if (DynamicDumpSharedSpaces && Thread::current()->is_VM_thread()) { 1056 // We are re-laying out the vtable/itables of the *copy* of 1057 // a class during the final stage of dynamic dumping. The 1058 // linking constraints for this class has already been recorded. 1059 return; 1060 } 1061 assert(!Thread::current()->is_VM_thread(), "must be"); 1062 1063 Arguments::assert_is_dumping_archive(); 1064 DumpTimeClassInfo* info = find_or_allocate_info_for(klass); 1065 if (info != NULL) { 1066 info->record_linking_constraint(name, loader1, loader2); 1067 } 1068 } 1069 1070 // returns true IFF there's no need to re-initialize the i/v-tables for klass for 1071 // the purpose of checking class loader constraints. 1072 bool SystemDictionaryShared::check_linking_constraints(Thread* current, InstanceKlass* klass) { 1073 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only"); 1074 LogTarget(Info, class, loader, constraints) log; 1075 if (klass->is_shared_boot_class()) { 1076 // No class loader constraint check performed for boot classes. 1077 return true; 1078 } 1079 if (klass->is_shared_platform_class() || klass->is_shared_app_class()) { 1080 RunTimeClassInfo* info = RunTimeClassInfo::get_for(klass); 1081 assert(info != NULL, "Sanity"); 1082 if (info->_num_loader_constraints > 0) { 1083 HandleMark hm(current); 1084 for (int i = 0; i < info->_num_loader_constraints; i++) { 1085 RunTimeClassInfo::RTLoaderConstraint* lc = info->loader_constraint_at(i); 1086 Symbol* name = lc->constraint_name(); 1087 Handle loader1(current, get_class_loader_by(lc->_loader_type1)); 1088 Handle loader2(current, get_class_loader_by(lc->_loader_type2)); 1089 if (log.is_enabled()) { 1090 ResourceMark rm(current); 1091 log.print("[CDS add loader constraint for class %s symbol %s loader[0] %s loader[1] %s", 1092 klass->external_name(), name->as_C_string(), 1093 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(), 1094 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id()); 1095 } 1096 if (!SystemDictionary::add_loader_constraint(name, klass, loader1, loader2)) { 1097 // Loader constraint violation has been found. The caller 1098 // will re-layout the vtable/itables to produce the correct 1099 // exception. 1100 if (log.is_enabled()) { 1101 log.print(" failed]"); 1102 } 1103 return false; 1104 } 1105 if (log.is_enabled()) { 1106 log.print(" succeeded]"); 1107 } 1108 } 1109 return true; // for all recorded constraints added successfully. 1110 } 1111 } 1112 if (log.is_enabled()) { 1113 ResourceMark rm(current); 1114 log.print("[CDS has not recorded loader constraint for class %s]", klass->external_name()); 1115 } 1116 return false; 1117 } 1118 1119 bool SystemDictionaryShared::is_supported_invokedynamic(BootstrapInfo* bsi) { 1120 LogTarget(Debug, cds, lambda) log; 1121 if (bsi->arg_values() == NULL || !bsi->arg_values()->is_objArray()) { 1122 if (log.is_enabled()) { 1123 LogStream log_stream(log); 1124 log.print("bsi check failed"); 1125 log.print(" bsi->arg_values().not_null() %d", bsi->arg_values().not_null()); 1126 if (bsi->arg_values().not_null()) { 1127 log.print(" bsi->arg_values()->is_objArray() %d", bsi->arg_values()->is_objArray()); 1128 bsi->print_msg_on(&log_stream); 1129 } 1130 } 1131 return false; 1132 } 1133 1134 Handle bsm = bsi->bsm(); 1135 if (bsm.is_null() || !java_lang_invoke_DirectMethodHandle::is_instance(bsm())) { 1136 if (log.is_enabled()) { 1137 log.print("bsm check failed"); 1138 log.print(" bsm.is_null() %d", bsm.is_null()); 1139 log.print(" java_lang_invoke_DirectMethodHandle::is_instance(bsm()) %d", 1140 java_lang_invoke_DirectMethodHandle::is_instance(bsm())); 1141 } 1142 return false; 1143 } 1144 1145 oop mn = java_lang_invoke_DirectMethodHandle::member(bsm()); 1146 Method* method = java_lang_invoke_MemberName::vmtarget(mn); 1147 if (method->klass_name()->equals("java/lang/invoke/LambdaMetafactory") && 1148 method->name()->equals("metafactory") && 1149 method->signature()->equals("(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;")) { 1150 return true; 1151 } else { 1152 if (log.is_enabled()) { 1153 ResourceMark rm; 1154 log.print("method check failed"); 1155 log.print(" klass_name() %s", method->klass_name()->as_C_string()); 1156 log.print(" name() %s", method->name()->as_C_string()); 1157 log.print(" signature() %s", method->signature()->as_C_string()); 1158 } 1159 } 1160 1161 return false; 1162 } 1163 1164 class EstimateSizeForArchive : StackObj { 1165 size_t _shared_class_info_size; 1166 int _num_builtin_klasses; 1167 int _num_unregistered_klasses; 1168 1169 public: 1170 EstimateSizeForArchive() { 1171 _shared_class_info_size = 0; 1172 _num_builtin_klasses = 0; 1173 _num_unregistered_klasses = 0; 1174 } 1175 1176 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) { 1177 if (!info.is_excluded()) { 1178 size_t byte_size = info.runtime_info_bytesize(); 1179 _shared_class_info_size += align_up(byte_size, SharedSpaceObjectAlignment); 1180 } 1181 return true; // keep on iterating 1182 } 1183 1184 size_t total() { 1185 return _shared_class_info_size; 1186 } 1187 }; 1188 1189 size_t SystemDictionaryShared::estimate_size_for_archive() { 1190 EstimateSizeForArchive est; 1191 _dumptime_table->iterate(&est); 1192 size_t total_size = est.total() + 1193 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(true)) + 1194 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(false)); 1195 if (_dumptime_lambda_proxy_class_dictionary != NULL) { 1196 size_t bytesize = align_up(sizeof(RunTimeLambdaProxyClassInfo), SharedSpaceObjectAlignment); 1197 total_size += 1198 (bytesize * _dumptime_lambda_proxy_class_dictionary->_count) + 1199 CompactHashtableWriter::estimate_size(_dumptime_lambda_proxy_class_dictionary->_count); 1200 } else { 1201 total_size += CompactHashtableWriter::estimate_size(0); 1202 } 1203 return total_size; 1204 } 1205 1206 unsigned int SystemDictionaryShared::hash_for_shared_dictionary(address ptr) { 1207 if (ArchiveBuilder::is_active()) { 1208 uintx offset = ArchiveBuilder::current()->any_to_offset(ptr); 1209 unsigned int hash = primitive_hash<uintx>(offset); 1210 DEBUG_ONLY({ 1211 if (MetaspaceObj::is_shared((const MetaspaceObj*)ptr)) { 1212 assert(hash == SystemDictionaryShared::hash_for_shared_dictionary_quick(ptr), "must be"); 1213 } 1214 }); 1215 return hash; 1216 } else { 1217 return SystemDictionaryShared::hash_for_shared_dictionary_quick(ptr); 1218 } 1219 } 1220 1221 class CopyLambdaProxyClassInfoToArchive : StackObj { 1222 CompactHashtableWriter* _writer; 1223 ArchiveBuilder* _builder; 1224 public: 1225 CopyLambdaProxyClassInfoToArchive(CompactHashtableWriter* writer) 1226 : _writer(writer), _builder(ArchiveBuilder::current()) {} 1227 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) { 1228 // In static dump, info._proxy_klasses->at(0) is already relocated to point to the archived class 1229 // (not the original class). 1230 // 1231 // The following check has been moved to SystemDictionaryShared::check_excluded_classes(), which 1232 // happens before the classes are copied. 1233 // 1234 // if (SystemDictionaryShared::is_excluded_class(info._proxy_klasses->at(0))) { 1235 // return true; 1236 //} 1237 ResourceMark rm; 1238 log_info(cds,dynamic)("Archiving hidden %s", info._proxy_klasses->at(0)->external_name()); 1239 size_t byte_size = sizeof(RunTimeLambdaProxyClassInfo); 1240 RunTimeLambdaProxyClassInfo* runtime_info = 1241 (RunTimeLambdaProxyClassInfo*)ArchiveBuilder::ro_region_alloc(byte_size); 1242 runtime_info->init(key, info); 1243 unsigned int hash = runtime_info->hash(); 1244 u4 delta = _builder->any_to_offset_u4((void*)runtime_info); 1245 _writer->add(hash, delta); 1246 return true; 1247 } 1248 }; 1249 1250 class AdjustLambdaProxyClassInfo : StackObj { 1251 public: 1252 AdjustLambdaProxyClassInfo() {} 1253 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) { 1254 int len = info._proxy_klasses->length(); 1255 if (len > 1) { 1256 for (int i = 0; i < len-1; i++) { 1257 InstanceKlass* ok0 = info._proxy_klasses->at(i+0); // this is original klass 1258 InstanceKlass* ok1 = info._proxy_klasses->at(i+1); // this is original klass 1259 assert(ArchiveBuilder::current()->is_in_buffer_space(ok0), "must be"); 1260 assert(ArchiveBuilder::current()->is_in_buffer_space(ok1), "must be"); 1261 InstanceKlass* bk0 = ok0; 1262 InstanceKlass* bk1 = ok1; 1263 assert(bk0->next_link() == 0, "must be called after Klass::remove_unshareable_info()"); 1264 assert(bk1->next_link() == 0, "must be called after Klass::remove_unshareable_info()"); 1265 bk0->set_next_link(bk1); 1266 bk1->set_lambda_proxy_is_available(); 1267 ArchivePtrMarker::mark_pointer(bk0->next_link_addr()); 1268 } 1269 } 1270 info._proxy_klasses->at(0)->set_lambda_proxy_is_available(); 1271 1272 return true; 1273 } 1274 }; 1275 1276 class CopySharedClassInfoToArchive : StackObj { 1277 CompactHashtableWriter* _writer; 1278 bool _is_builtin; 1279 ArchiveBuilder *_builder; 1280 public: 1281 CopySharedClassInfoToArchive(CompactHashtableWriter* writer, 1282 bool is_builtin) 1283 : _writer(writer), _is_builtin(is_builtin), _builder(ArchiveBuilder::current()) {} 1284 1285 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) { 1286 if (!info.is_excluded() && info.is_builtin() == _is_builtin) { 1287 size_t byte_size = info.runtime_info_bytesize(); 1288 RunTimeClassInfo* record; 1289 record = (RunTimeClassInfo*)ArchiveBuilder::ro_region_alloc(byte_size); 1290 record->init(info); 1291 1292 unsigned int hash; 1293 Symbol* name = info._klass->name(); 1294 hash = SystemDictionaryShared::hash_for_shared_dictionary((address)name); 1295 u4 delta = _builder->buffer_to_offset_u4((address)record); 1296 if (_is_builtin && info._klass->is_hidden()) { 1297 // skip 1298 } else { 1299 _writer->add(hash, delta); 1300 } 1301 if (log_is_enabled(Trace, cds, hashtables)) { 1302 ResourceMark rm; 1303 log_trace(cds,hashtables)("%s dictionary: %s", (_is_builtin ? "builtin" : "unregistered"), info._klass->external_name()); 1304 } 1305 1306 // Save this for quick runtime lookup of InstanceKlass* -> RunTimeClassInfo* 1307 RunTimeClassInfo::set_for(info._klass, record); 1308 } 1309 return true; // keep on iterating 1310 } 1311 }; 1312 1313 void SystemDictionaryShared::write_lambda_proxy_class_dictionary(LambdaProxyClassDictionary *dictionary) { 1314 CompactHashtableStats stats; 1315 dictionary->reset(); 1316 CompactHashtableWriter writer(_dumptime_lambda_proxy_class_dictionary->_count, &stats); 1317 CopyLambdaProxyClassInfoToArchive copy(&writer); 1318 _dumptime_lambda_proxy_class_dictionary->iterate(©); 1319 writer.dump(dictionary, "lambda proxy class dictionary"); 1320 } 1321 1322 void SystemDictionaryShared::write_dictionary(RunTimeSharedDictionary* dictionary, 1323 bool is_builtin) { 1324 CompactHashtableStats stats; 1325 dictionary->reset(); 1326 CompactHashtableWriter writer(_dumptime_table->count_of(is_builtin), &stats); 1327 CopySharedClassInfoToArchive copy(&writer, is_builtin); 1328 assert_lock_strong(DumpTimeTable_lock); 1329 _dumptime_table->iterate(©); 1330 writer.dump(dictionary, is_builtin ? "builtin dictionary" : "unregistered dictionary"); 1331 } 1332 1333 void SystemDictionaryShared::write_to_archive(bool is_static_archive) { 1334 if (is_static_archive) { 1335 write_dictionary(&_builtin_dictionary, true); 1336 write_dictionary(&_unregistered_dictionary, false); 1337 } else { 1338 write_dictionary(&_dynamic_builtin_dictionary, true); 1339 write_dictionary(&_dynamic_unregistered_dictionary, false); 1340 } 1341 if (_dumptime_lambda_proxy_class_dictionary != NULL) { 1342 write_lambda_proxy_class_dictionary(&_lambda_proxy_class_dictionary); 1343 } 1344 } 1345 1346 void SystemDictionaryShared::adjust_lambda_proxy_class_dictionary() { 1347 if (_dumptime_lambda_proxy_class_dictionary != NULL) { 1348 AdjustLambdaProxyClassInfo adjuster; 1349 _dumptime_lambda_proxy_class_dictionary->iterate(&adjuster); 1350 } 1351 } 1352 1353 void SystemDictionaryShared::serialize_dictionary_headers(SerializeClosure* soc, 1354 bool is_static_archive) { 1355 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info(); 1356 if (is_static_archive) { 1357 _builtin_dictionary.serialize_header(soc); 1358 _unregistered_dictionary.serialize_header(soc); 1359 if (dynamic_mapinfo == NULL || DynamicDumpSharedSpaces || (dynamic_mapinfo != NULL && UseSharedSpaces)) { 1360 _lambda_proxy_class_dictionary.serialize_header(soc); 1361 } 1362 } else { 1363 _dynamic_builtin_dictionary.serialize_header(soc); 1364 _dynamic_unregistered_dictionary.serialize_header(soc); 1365 if (DynamicDumpSharedSpaces) { 1366 _lambda_proxy_class_dictionary.serialize_header(soc); 1367 } else { 1368 _dynamic_lambda_proxy_class_dictionary.serialize_header(soc); 1369 } 1370 } 1371 } 1372 1373 void SystemDictionaryShared::serialize_vm_classes(SerializeClosure* soc) { 1374 for (auto id : EnumRange<vmClassID>{}) { 1375 soc->do_ptr((void**)vmClasses::klass_addr_at(id)); 1376 } 1377 } 1378 1379 const RunTimeClassInfo* 1380 SystemDictionaryShared::find_record(RunTimeSharedDictionary* static_dict, RunTimeSharedDictionary* dynamic_dict, Symbol* name) { 1381 if (!UseSharedSpaces || !name->is_shared()) { 1382 // The names of all shared classes must also be a shared Symbol. 1383 return NULL; 1384 } 1385 1386 unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary_quick(name); 1387 const RunTimeClassInfo* record = NULL; 1388 if (DynamicArchive::is_mapped()) { 1389 // Those regenerated holder classes are in dynamic archive 1390 if (name == vmSymbols::java_lang_invoke_Invokers_Holder() || 1391 name == vmSymbols::java_lang_invoke_DirectMethodHandle_Holder() || 1392 name == vmSymbols::java_lang_invoke_LambdaForm_Holder() || 1393 name == vmSymbols::java_lang_invoke_DelegatingMethodHandle_Holder()) { 1394 record = dynamic_dict->lookup(name, hash, 0); 1395 if (record != nullptr) { 1396 return record; 1397 } 1398 } 1399 } 1400 1401 if (!MetaspaceShared::is_shared_dynamic(name)) { 1402 // The names of all shared classes in the static dict must also be in the 1403 // static archive 1404 record = static_dict->lookup(name, hash, 0); 1405 } 1406 1407 if (record == NULL && DynamicArchive::is_mapped()) { 1408 record = dynamic_dict->lookup(name, hash, 0); 1409 } 1410 1411 return record; 1412 } 1413 1414 InstanceKlass* SystemDictionaryShared::find_builtin_class(Symbol* name) { 1415 const RunTimeClassInfo* record = find_record(&_builtin_dictionary, &_dynamic_builtin_dictionary, name); 1416 if (record != NULL) { 1417 #ifdef ASSERT 1418 if (UseCompressedClassPointers) { 1419 CompressedKlassPointers::verify_klass_pointer(record->_klass); 1420 } 1421 #endif 1422 assert(!record->_klass->is_hidden(), "hidden class cannot be looked up by name"); 1423 // assert(check_alignment(record->_klass), "Address not aligned"); 1424 // We did not save the classfile data of the regenerated LambdaForm invoker classes, 1425 // so we cannot support CLFH for such classes. 1426 if (record->_klass->is_regenerated() && JvmtiExport::should_post_class_file_load_hook()) { 1427 return NULL; 1428 } 1429 return record->_klass; 1430 } else { 1431 return NULL; 1432 } 1433 } 1434 1435 void SystemDictionaryShared::update_shared_entry(InstanceKlass* k, int id) { 1436 assert(DumpSharedSpaces, "supported only when dumping"); 1437 DumpTimeClassInfo* info = find_or_allocate_info_for(k); 1438 info->_id = id; 1439 } 1440 1441 const char* class_loader_name_for_shared(Klass* k) { 1442 assert(k != nullptr, "Sanity"); 1443 assert(k->is_shared(), "Must be"); 1444 assert(k->is_instance_klass(), "Must be"); 1445 InstanceKlass* ik = InstanceKlass::cast(k); 1446 if (ik->is_shared_boot_class()) { 1447 return "boot_loader"; 1448 } else if (ik->is_shared_platform_class()) { 1449 return "platform_loader"; 1450 } else if (ik->is_shared_app_class()) { 1451 return "app_loader"; 1452 } else if (ik->is_shared_unregistered_class()) { 1453 return "unregistered_loader"; 1454 } else { 1455 return "unknown loader"; 1456 } 1457 } 1458 1459 class SharedDictionaryPrinter : StackObj { 1460 outputStream* _st; 1461 int _index; 1462 public: 1463 SharedDictionaryPrinter(outputStream* st) : _st(st), _index(0) {} 1464 1465 void do_value(const RunTimeClassInfo* record) { 1466 ResourceMark rm; 1467 _st->print_cr("%4d: %s %s", _index++, record->_klass->external_name(), 1468 class_loader_name_for_shared(record->_klass)); 1469 } 1470 int index() const { return _index; } 1471 }; 1472 1473 class SharedLambdaDictionaryPrinter : StackObj { 1474 outputStream* _st; 1475 int _index; 1476 public: 1477 SharedLambdaDictionaryPrinter(outputStream* st, int idx) : _st(st), _index(idx) {} 1478 1479 void do_value(const RunTimeLambdaProxyClassInfo* record) { 1480 if (record->proxy_klass_head()->lambda_proxy_is_available()) { 1481 ResourceMark rm; 1482 Klass* k = record->proxy_klass_head(); 1483 while (k != nullptr) { 1484 _st->print_cr("%4d: %s %s", _index++, k->external_name(), 1485 class_loader_name_for_shared(k)); 1486 k = k->next_link(); 1487 } 1488 } 1489 } 1490 }; 1491 1492 void SystemDictionaryShared::print_on(const char* prefix, 1493 RunTimeSharedDictionary* builtin_dictionary, 1494 RunTimeSharedDictionary* unregistered_dictionary, 1495 LambdaProxyClassDictionary* lambda_dictionary, 1496 outputStream* st) { 1497 st->print_cr("%sShared Dictionary", prefix); 1498 SharedDictionaryPrinter p(st); 1499 st->print_cr("%sShared Builtin Dictionary", prefix); 1500 builtin_dictionary->iterate(&p); 1501 st->print_cr("%sShared Unregistered Dictionary", prefix); 1502 unregistered_dictionary->iterate(&p); 1503 if (!lambda_dictionary->empty()) { 1504 st->print_cr("%sShared Lambda Dictionary", prefix); 1505 SharedLambdaDictionaryPrinter ldp(st, p.index()); 1506 lambda_dictionary->iterate(&ldp); 1507 } 1508 } 1509 1510 void SystemDictionaryShared::print_shared_archive(outputStream* st, bool is_static) { 1511 if (UseSharedSpaces) { 1512 if (is_static) { 1513 print_on("", &_builtin_dictionary, &_unregistered_dictionary, &_lambda_proxy_class_dictionary, st); 1514 } else { 1515 if (DynamicArchive::is_mapped()) { 1516 print_on("", &_dynamic_builtin_dictionary, &_dynamic_unregistered_dictionary, 1517 &_dynamic_lambda_proxy_class_dictionary, st); 1518 } 1519 } 1520 } 1521 } 1522 1523 void SystemDictionaryShared::print_on(outputStream* st) { 1524 if (UseSharedSpaces) { 1525 print_on("", &_builtin_dictionary, &_unregistered_dictionary, &_lambda_proxy_class_dictionary, st); 1526 if (DynamicArchive::is_mapped()) { 1527 print_on("", &_dynamic_builtin_dictionary, &_dynamic_unregistered_dictionary, 1528 &_dynamic_lambda_proxy_class_dictionary, st); 1529 } 1530 } 1531 } 1532 1533 void SystemDictionaryShared::print_table_statistics(outputStream* st) { 1534 if (UseSharedSpaces) { 1535 _builtin_dictionary.print_table_statistics(st, "Builtin Shared Dictionary"); 1536 _unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary"); 1537 _lambda_proxy_class_dictionary.print_table_statistics(st, "Lambda Shared Dictionary"); 1538 if (DynamicArchive::is_mapped()) { 1539 _dynamic_builtin_dictionary.print_table_statistics(st, "Dynamic Builtin Shared Dictionary"); 1540 _dynamic_unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary"); 1541 _dynamic_lambda_proxy_class_dictionary.print_table_statistics(st, "Dynamic Lambda Shared Dictionary"); 1542 } 1543 } 1544 } 1545 1546 bool SystemDictionaryShared::is_dumptime_table_empty() { 1547 assert_lock_strong(DumpTimeTable_lock); 1548 if (_dumptime_table == NULL) { 1549 return true; 1550 } 1551 _dumptime_table->update_counts(); 1552 if (_dumptime_table->count_of(true) == 0 && _dumptime_table->count_of(false) == 0){ 1553 return true; 1554 } 1555 return false; 1556 } 1557 1558 class CloneDumpTimeClassTable: public StackObj { 1559 DumpTimeSharedClassTable* _table; 1560 DumpTimeSharedClassTable* _cloned_table; 1561 public: 1562 CloneDumpTimeClassTable(DumpTimeSharedClassTable* table, DumpTimeSharedClassTable* clone) : 1563 _table(table), _cloned_table(clone) { 1564 assert(_table != NULL, "_dumptime_table is NULL"); 1565 assert(_cloned_table != NULL, "_cloned_table is NULL"); 1566 } 1567 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) { 1568 if (!info.is_excluded()) { 1569 bool created; 1570 _cloned_table->put_if_absent(k, info.clone(), &created); 1571 } 1572 return true; // keep on iterating 1573 } 1574 }; 1575 1576 class CloneDumpTimeLambdaProxyClassTable: StackObj { 1577 DumpTimeLambdaProxyClassDictionary* _table; 1578 DumpTimeLambdaProxyClassDictionary* _cloned_table; 1579 public: 1580 CloneDumpTimeLambdaProxyClassTable(DumpTimeLambdaProxyClassDictionary* table, 1581 DumpTimeLambdaProxyClassDictionary* clone) : 1582 _table(table), _cloned_table(clone) { 1583 assert(_table != NULL, "_dumptime_table is NULL"); 1584 assert(_cloned_table != NULL, "_cloned_table is NULL"); 1585 } 1586 1587 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) { 1588 assert_lock_strong(DumpTimeTable_lock); 1589 bool created; 1590 // make copies then store in _clone_table 1591 LambdaProxyClassKey keyCopy = key; 1592 _cloned_table->put_if_absent(keyCopy, info.clone(), &created); 1593 ++ _cloned_table->_count; 1594 return true; // keep on iterating 1595 } 1596 }; 1597 1598 void SystemDictionaryShared::clone_dumptime_tables() { 1599 Arguments::assert_is_dumping_archive(); 1600 assert_lock_strong(DumpTimeTable_lock); 1601 if (_dumptime_table != NULL) { 1602 assert(_cloned_dumptime_table == NULL, "_cloned_dumptime_table must be cleaned"); 1603 _cloned_dumptime_table = new (ResourceObj::C_HEAP, mtClass) DumpTimeSharedClassTable; 1604 CloneDumpTimeClassTable copy_classes(_dumptime_table, _cloned_dumptime_table); 1605 _dumptime_table->iterate(©_classes); 1606 _cloned_dumptime_table->update_counts(); 1607 } 1608 if (_dumptime_lambda_proxy_class_dictionary != NULL) { 1609 assert(_cloned_dumptime_lambda_proxy_class_dictionary == NULL, 1610 "_cloned_dumptime_lambda_proxy_class_dictionary must be cleaned"); 1611 _cloned_dumptime_lambda_proxy_class_dictionary = 1612 new (ResourceObj::C_HEAP, mtClass) DumpTimeLambdaProxyClassDictionary; 1613 CloneDumpTimeLambdaProxyClassTable copy_proxy_classes(_dumptime_lambda_proxy_class_dictionary, 1614 _cloned_dumptime_lambda_proxy_class_dictionary); 1615 _dumptime_lambda_proxy_class_dictionary->iterate(©_proxy_classes); 1616 } 1617 } 1618 1619 void SystemDictionaryShared::restore_dumptime_tables() { 1620 assert_lock_strong(DumpTimeTable_lock); 1621 delete _dumptime_table; 1622 _dumptime_table = _cloned_dumptime_table; 1623 _cloned_dumptime_table = NULL; 1624 delete _dumptime_lambda_proxy_class_dictionary; 1625 _dumptime_lambda_proxy_class_dictionary = _cloned_dumptime_lambda_proxy_class_dictionary; 1626 _cloned_dumptime_lambda_proxy_class_dictionary = NULL; 1627 } 1628 1629 class CleanupDumpTimeLambdaProxyClassTable: StackObj { 1630 public: 1631 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) { 1632 assert_lock_strong(DumpTimeTable_lock); 1633 InstanceKlass* caller_ik = key.caller_ik(); 1634 if (SystemDictionaryShared::check_for_exclusion(caller_ik, NULL)) { 1635 // If the caller class is excluded, unregister all the associated lambda proxy classes 1636 // so that they will not be included in the CDS archive. 1637 for (int i = info._proxy_klasses->length() - 1; i >= 0; i--) { 1638 SystemDictionaryShared::reset_registered_lambda_proxy_class(info._proxy_klasses->at(i)); 1639 info._proxy_klasses->remove_at(i); 1640 } 1641 } 1642 for (int i = info._proxy_klasses->length() - 1; i >= 0; i--) { 1643 InstanceKlass* ik = info._proxy_klasses->at(i); 1644 if (SystemDictionaryShared::check_for_exclusion(ik, NULL)) { 1645 SystemDictionaryShared::reset_registered_lambda_proxy_class(ik); 1646 info._proxy_klasses->remove_at(i); 1647 } 1648 } 1649 return info._proxy_klasses->length() == 0 ? true /* delete the node*/ : false; 1650 } 1651 }; 1652 1653 void SystemDictionaryShared::cleanup_lambda_proxy_class_dictionary() { 1654 assert_lock_strong(DumpTimeTable_lock); 1655 if (_dumptime_lambda_proxy_class_dictionary != NULL) { 1656 CleanupDumpTimeLambdaProxyClassTable cleanup_proxy_classes; 1657 _dumptime_lambda_proxy_class_dictionary->unlink(&cleanup_proxy_classes); 1658 } 1659 } 1660 1661 #if INCLUDE_CDS_JAVA_HEAP 1662 1663 class ArchivedMirrorPatcher { 1664 protected: 1665 static void update(Klass* k) { 1666 if (k->has_archived_mirror_index()) { 1667 oop m = k->archived_java_mirror(); 1668 if (m != NULL) { 1669 java_lang_Class::update_archived_mirror_native_pointers(m); 1670 } 1671 } 1672 } 1673 1674 public: 1675 static void update_array_klasses(Klass* ak) { 1676 while (ak != NULL) { 1677 update(ak); 1678 ak = ArrayKlass::cast(ak)->higher_dimension(); 1679 } 1680 } 1681 1682 void do_value(const RunTimeClassInfo* info) { 1683 InstanceKlass* ik = info->_klass; 1684 update(ik); 1685 update_array_klasses(ik->array_klasses()); 1686 } 1687 }; 1688 1689 class ArchivedLambdaMirrorPatcher : public ArchivedMirrorPatcher { 1690 public: 1691 void do_value(const RunTimeLambdaProxyClassInfo* info) { 1692 InstanceKlass* ik = info->proxy_klass_head(); 1693 while (ik != NULL) { 1694 update(ik); 1695 Klass* k = ik->next_link(); 1696 ik = (k != NULL) ? InstanceKlass::cast(k) : NULL; 1697 } 1698 } 1699 }; 1700 1701 void SystemDictionaryShared::update_archived_mirror_native_pointers_for(RunTimeSharedDictionary* dict) { 1702 ArchivedMirrorPatcher patcher; 1703 dict->iterate(&patcher); 1704 } 1705 1706 void SystemDictionaryShared::update_archived_mirror_native_pointers_for(LambdaProxyClassDictionary* dict) { 1707 ArchivedLambdaMirrorPatcher patcher; 1708 dict->iterate(&patcher); 1709 } 1710 1711 void SystemDictionaryShared::update_archived_mirror_native_pointers() { 1712 if (!HeapShared::are_archived_mirrors_available()) { 1713 return; 1714 } 1715 if (MetaspaceShared::relocation_delta() == 0) { 1716 return; 1717 } 1718 update_archived_mirror_native_pointers_for(&_builtin_dictionary); 1719 update_archived_mirror_native_pointers_for(&_unregistered_dictionary); 1720 update_archived_mirror_native_pointers_for(&_lambda_proxy_class_dictionary); 1721 1722 for (int t = T_BOOLEAN; t <= T_LONG; t++) { 1723 Klass* k = Universe::typeArrayKlassObj((BasicType)t); 1724 ArchivedMirrorPatcher::update_array_klasses(k); 1725 } 1726 } 1727 #endif