1 /*
2 * Copyright (c) 2014, 2024, 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/archiveBuilder.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/archiveUtils.hpp"
29 #include "cds/cdsConfig.hpp"
30 #include "cds/classListParser.hpp"
31 #include "cds/classListWriter.hpp"
32 #include "cds/dynamicArchive.hpp"
33 #include "cds/filemap.hpp"
34 #include "cds/heapShared.hpp"
35 #include "cds/cdsProtectionDomain.hpp"
36 #include "cds/dumpTimeClassInfo.inline.hpp"
37 #include "cds/lambdaFormInvokers.inline.hpp"
38 #include "cds/metaspaceShared.hpp"
39 #include "cds/runTimeClassInfo.hpp"
40 #include "classfile/classFileStream.hpp"
41 #include "classfile/classLoader.hpp"
42 #include "classfile/classLoaderData.inline.hpp"
43 #include "classfile/classLoaderDataGraph.hpp"
44 #include "classfile/classLoaderExt.hpp"
45 #include "classfile/dictionary.hpp"
46 #include "classfile/javaClasses.hpp"
47 #include "classfile/javaClasses.inline.hpp"
48 #include "classfile/symbolTable.hpp"
49 #include "classfile/systemDictionary.hpp"
50 #include "classfile/systemDictionaryShared.hpp"
51 #include "classfile/verificationType.hpp"
52 #include "classfile/vmClasses.hpp"
53 #include "classfile/vmSymbols.hpp"
54 #include "interpreter/bootstrapInfo.hpp"
55 #include "jfr/jfrEvents.hpp"
56 #include "logging/log.hpp"
57 #include "logging/logStream.hpp"
58 #include "memory/allocation.hpp"
59 #include "memory/metadataFactory.hpp"
60 #include "memory/metaspaceClosure.hpp"
61 #include "memory/oopFactory.hpp"
62 #include "memory/resourceArea.hpp"
63 #include "memory/universe.hpp"
64 #include "oops/instanceKlass.hpp"
65 #include "oops/klass.inline.hpp"
66 #include "oops/methodData.hpp"
67 #include "oops/trainingData.hpp"
68 #include "oops/objArrayKlass.hpp"
69 #include "oops/objArrayOop.inline.hpp"
70 #include "oops/oop.inline.hpp"
71 #include "oops/oopHandle.inline.hpp"
72 #include "oops/typeArrayOop.inline.hpp"
73 #include "runtime/arguments.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/java.hpp"
76 #include "runtime/javaCalls.hpp"
77 #include "runtime/mutexLocker.hpp"
78 #include "utilities/resourceHash.hpp"
79 #include "utilities/stringUtils.hpp"
80
81 SystemDictionaryShared::ArchiveInfo SystemDictionaryShared::_static_archive;
82 SystemDictionaryShared::ArchiveInfo SystemDictionaryShared::_dynamic_archive;
83
84 DumpTimeSharedClassTable* SystemDictionaryShared::_dumptime_table = nullptr;
85 DumpTimeLambdaProxyClassDictionary* SystemDictionaryShared::_dumptime_lambda_proxy_class_dictionary = nullptr;
86
87 static Array<InstanceKlass*>* _archived_lambda_form_classes = nullptr;
88 static Array<InstanceKlass*>* _archived_lambda_proxy_classes_boot = nullptr;
89 static Array<InstanceKlass*>* _archived_lambda_proxy_classes_boot2 = nullptr;
90 static Array<InstanceKlass*>* _archived_lambda_proxy_classes_platform = nullptr;
91 static Array<InstanceKlass*>* _archived_lambda_proxy_classes_app = nullptr;
92 static bool _ignore_new_classes = false;
93
94 // Used by NoClassLoadingMark
95 DEBUG_ONLY(bool SystemDictionaryShared::_class_loading_may_happen = true;)
96
97 InstanceKlass* SystemDictionaryShared::load_shared_class_for_builtin_loader(
98 Symbol* class_name, Handle class_loader, TRAPS) {
99 assert(CDSConfig::is_using_archive(), "must be");
100 InstanceKlass* ik = find_builtin_class(class_name);
101
102 if (ik != nullptr && !ik->shared_loading_failed()) {
103 if ((SystemDictionary::is_system_class_loader(class_loader()) && ik->is_shared_app_class()) ||
104 (SystemDictionary::is_platform_class_loader(class_loader()) && ik->is_shared_platform_class())) {
105 SharedClassLoadingMark slm(THREAD, ik);
106 PackageEntry* pkg_entry = CDSProtectionDomain::get_package_entry_from_class(ik, class_loader);
107 Handle protection_domain;
108 if (!class_name->starts_with("jdk/proxy")) // java/lang/reflect/Proxy$ProxyBuilder defines the proxy classes with a null protection domain.
109 {
110 protection_domain = CDSProtectionDomain::init_security_info(class_loader, ik, pkg_entry, CHECK_NULL);
111 }
112 return load_shared_class(ik, class_loader, protection_domain, nullptr, pkg_entry, THREAD);
113 }
114 }
115 return nullptr;
116 }
117
118 // This function is called for loading only UNREGISTERED classes
119 InstanceKlass* SystemDictionaryShared::lookup_from_stream(Symbol* class_name,
120 Handle class_loader,
121 Handle protection_domain,
122 const ClassFileStream* cfs,
123 TRAPS) {
124 if (!CDSConfig::is_using_archive()) {
125 return nullptr;
126 }
127 if (class_name == nullptr) { // don't do this for hidden classes
128 return nullptr;
129 }
130 if (class_loader.is_null() ||
131 SystemDictionary::is_system_class_loader(class_loader()) ||
132 SystemDictionary::is_platform_class_loader(class_loader())) {
133 // Do nothing for the BUILTIN loaders.
134 return nullptr;
135 }
136
137 const RunTimeClassInfo* record = find_record(&_static_archive._unregistered_dictionary,
138 &_dynamic_archive._unregistered_dictionary,
139 class_name);
140 if (record == nullptr) {
141 return nullptr;
142 }
143
144 int clsfile_size = cfs->length();
145 int clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
146
147 if (!record->matches(clsfile_size, clsfile_crc32)) {
148 return nullptr;
149 }
150
151 return acquire_class_for_current_thread(record->_klass, class_loader,
152 protection_domain, cfs,
153 THREAD);
154 }
155
156 InstanceKlass* SystemDictionaryShared::acquire_class_for_current_thread(
157 InstanceKlass *ik,
158 Handle class_loader,
159 Handle protection_domain,
160 const ClassFileStream *cfs,
161 TRAPS) {
162 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
163
164 {
165 MutexLocker mu(THREAD, SharedDictionary_lock);
166 if (ik->class_loader_data() != nullptr) {
167 // ik is already loaded (by this loader or by a different loader)
168 // or ik is being loaded by a different thread (by this loader or by a different loader)
169 return nullptr;
170 }
171
172 // No other thread has acquired this yet, so give it to *this thread*
173 ik->set_class_loader_data(loader_data);
174 }
175
176 // No longer holding SharedDictionary_lock
177 // No need to lock, as <ik> can be held only by a single thread.
178 loader_data->add_class(ik);
179
180 // Get the package entry.
181 PackageEntry* pkg_entry = CDSProtectionDomain::get_package_entry_from_class(ik, class_loader);
182
183 // Load and check super/interfaces, restore unshareable info
184 InstanceKlass* shared_klass = load_shared_class(ik, class_loader, protection_domain,
185 cfs, pkg_entry, THREAD);
186 if (shared_klass == nullptr || HAS_PENDING_EXCEPTION) {
187 // TODO: clean up <ik> so it can be used again
188 return nullptr;
189 }
190
191 return shared_klass;
192 }
193
194 // Guaranteed to return non-null value for non-shared classes.
195 // k must not be a shared class.
196 DumpTimeClassInfo* SystemDictionaryShared::get_info(InstanceKlass* k) {
197 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
198 //assert(!k->is_shared(), "sanity"); // FIXME new workflow
199 return get_info_locked(k);
200 }
201
202 DumpTimeClassInfo* SystemDictionaryShared::get_info_locked(InstanceKlass* k) {
203 assert_lock_strong(DumpTimeTable_lock);
204 //assert(!k->is_shared(), "sanity"); // FIXME new workflow
205 DumpTimeClassInfo* info = _dumptime_table->get_info(k);
206 assert(info != nullptr, "must be");
207 return info;
208 }
209
210 void SystemDictionaryShared::mark_required_class(InstanceKlass* k) {
211 DumpTimeClassInfo* info = _dumptime_table->get(k);
212 ResourceMark rm;
213 if (info != nullptr) {
214 info->set_is_required();
215 }
216 }
217
218 bool SystemDictionaryShared::check_for_exclusion(InstanceKlass* k, DumpTimeClassInfo* info) {
219 if (!CDSConfig::is_dumping_final_static_archive() && MetaspaceShared::is_in_shared_metaspace(k)) {
220 // We have reached a super type that's already in the base archive. Treat it
221 // as "not excluded".
222 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
223 return false;
224 }
225
226 if (info == nullptr) {
227 info = _dumptime_table->get(k);
228 assert(info != nullptr, "supertypes of any classes in _dumptime_table must either be shared, or must also be in _dumptime_table");
229 }
230
231 if (!info->has_checked_exclusion()) {
232 if (check_for_exclusion_impl(k)) {
233 info->set_excluded();
234 }
235 info->set_has_checked_exclusion();
236 }
237
238 return info->is_excluded();
239 }
240
241 // Returns true so the caller can do: return warn_excluded(".....");
242 bool SystemDictionaryShared::warn_excluded(InstanceKlass* k, const char* reason) {
243 ResourceMark rm;
244 log_warning(cds)("Skipping %s: %s", k->name()->as_C_string(), reason);
245 return true;
246 }
247
248 bool SystemDictionaryShared::is_jfr_event_class(InstanceKlass *k) {
249 while (k) {
250 if (k->name()->equals("jdk/internal/event/Event")) {
251 return true;
252 }
253 k = k->java_super();
254 }
255 return false;
256 }
257
258 bool SystemDictionaryShared::is_registered_lambda_proxy_class(InstanceKlass* ik) {
259 DumpTimeClassInfo* info = _dumptime_table->get(ik);
260 return (info != nullptr) ? info->_is_archived_lambda_proxy : false;
261 }
262
263 void SystemDictionaryShared::reset_registered_lambda_proxy_class(InstanceKlass* ik) {
264 DumpTimeClassInfo* info = _dumptime_table->get(ik);
265 if (info != nullptr) {
266 info->_is_archived_lambda_proxy = false;
267 info->set_excluded();
268 }
269 }
270
271 bool SystemDictionaryShared::is_early_klass(InstanceKlass* ik) {
272 DumpTimeClassInfo* info = _dumptime_table->get(ik);
273 return (info != nullptr) ? info->is_early_klass() : false;
274 }
275
276 bool SystemDictionaryShared::is_hidden_lambda_proxy(InstanceKlass* ik) {
277 assert(ik->is_shared(), "applicable to only a shared class");
278 if (ik->is_hidden()) {
279 return true;
280 } else {
281 return false;
282 }
283 }
284
285 void SystemDictionaryShared::ignore_new_classes() {
286 _ignore_new_classes = true;
287 }
288
289
290 bool SystemDictionaryShared::check_for_exclusion_impl(InstanceKlass* k) {
291 if (CDSConfig::is_dumping_final_static_archive() && k->is_shared_unregistered_class()
292 && k->is_shared()) {
293 return false; // Do not exclude: unregistered classes are passed from preimage to final image.
294 }
295
296 if (k->is_in_error_state()) {
297 return warn_excluded(k, "In error state");
298 }
299 if (k->is_scratch_class()) {
300 return warn_excluded(k, "A scratch class");
301 }
302 if (!k->is_loaded()) {
303 return warn_excluded(k, "Not in loaded state");
304 }
305 if (has_been_redefined(k)) {
306 return warn_excluded(k, "Has been redefined");
307 }
308 if (!k->is_hidden() && k->shared_classpath_index() < 0 && is_builtin(k)) {
309 if (k->name()->starts_with("java/lang/invoke/BoundMethodHandle$Species_")) {
310 // This class is dynamically generated by the JDK
311 if (CDSConfig::is_dumping_aot_linked_classes()) {
312 k->set_shared_classpath_index(0);
313 } else {
314 ResourceMark rm;
315 log_info(cds)("Skipping %s because it is dynamically generated", k->name()->as_C_string());
316 return true; // exclude without warning
317 }
318 } else {
319 // These are classes loaded from unsupported locations (such as those loaded by JVMTI native
320 // agent during dump time).
321 return warn_excluded(k, "Unsupported location");
322 }
323 }
324 if (k->signers() != nullptr) {
325 // We cannot include signed classes in the archive because the certificates
326 // used during dump time may be different than those used during
327 // runtime (due to expiration, etc).
328 return warn_excluded(k, "Signed JAR");
329 }
330 if (is_jfr_event_class(k)) {
331 // We cannot include JFR event classes because they need runtime-specific
332 // instrumentation in order to work with -XX:FlightRecorderOptions:retransform=false.
333 // There are only a small number of these classes, so it's not worthwhile to
334 // support them and make CDS more complicated.
335 if (!CDSConfig::is_dumping_reflection_data()) { // FIXME: !!! HACK !!!
336 return warn_excluded(k, "JFR event class");
337 }
338 }
339
340 if (!CDSConfig::preserve_all_dumptime_verification_states(k)) {
341 if (!k->is_linked()) {
342 if (has_class_failed_verification(k)) {
343 return warn_excluded(k, "Failed verification");
344 }
345 } else {
346 if (!k->can_be_verified_at_dumptime()) {
347 // We have an old class that has been linked (e.g., it's been executed during
348 // dump time). This class has been verified using the old verifier, which
349 // doesn't save the verification constraints, so check_verification_constraints()
350 // won't work at runtime.
351 // As a result, we cannot store this class. It must be loaded and fully verified
352 // at runtime.
353 return warn_excluded(k, "Old class has been linked");
354 }
355 }
356 }
357
358 if (k->is_hidden() && !should_hidden_class_be_archived(k)) {
359 log_info(cds)("Skipping %s: Hidden class", k->name()->as_C_string());
360 return true;
361 }
362
363 InstanceKlass* super = k->java_super();
364 if (super != nullptr && check_for_exclusion(super, nullptr)) {
365 ResourceMark rm;
366 log_warning(cds)("Skipping %s: super class %s is excluded", k->name()->as_C_string(), super->name()->as_C_string());
367 return true;
368 }
369
370 Array<InstanceKlass*>* interfaces = k->local_interfaces();
371 int len = interfaces->length();
372 for (int i = 0; i < len; i++) {
373 InstanceKlass* intf = interfaces->at(i);
374 if (check_for_exclusion(intf, nullptr)) {
375 ResourceMark rm;
376 log_warning(cds)("Skipping %s: interface %s is excluded", k->name()->as_C_string(), intf->name()->as_C_string());
377 return true;
378 }
379 }
380
381 if (ClassLoaderExt::should_be_excluded(k)) {
382 ResourceMark rm;
383 log_info(cds)("Skipping %s: excluded via -XX:CacheOnlyClassesIn", k->name()->as_C_string());
384 return true;
385 }
386
387 return false; // false == k should NOT be excluded
388 }
389
390 bool SystemDictionaryShared::is_builtin_loader(ClassLoaderData* loader_data) {
391 oop class_loader = loader_data->class_loader();
392 return (class_loader == nullptr ||
393 SystemDictionary::is_system_class_loader(class_loader) ||
394 SystemDictionary::is_platform_class_loader(class_loader));
395 }
396
397 bool SystemDictionaryShared::has_platform_or_app_classes() {
398 if (FileMapInfo::current_info()->has_platform_or_app_classes()) {
399 return true;
400 }
401 if (DynamicArchive::is_mapped() &&
402 FileMapInfo::dynamic_info()->has_platform_or_app_classes()) {
403 return true;
404 }
405 return false;
406 }
407
408 // The following stack shows how this code is reached:
409 //
410 // [0] SystemDictionaryShared::find_or_load_shared_class()
411 // [1] JVM_FindLoadedClass
412 // [2] java.lang.ClassLoader.findLoadedClass0()
413 // [3] java.lang.ClassLoader.findLoadedClass()
414 // [4] jdk.internal.loader.BuiltinClassLoader.loadClassOrNull()
415 // [5] jdk.internal.loader.BuiltinClassLoader.loadClass()
416 // [6] jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(), or
417 // jdk.internal.loader.ClassLoaders$PlatformClassLoader.loadClass()
418 //
419 // AppCDS supports fast class loading for these 2 built-in class loaders:
420 // jdk.internal.loader.ClassLoaders$PlatformClassLoader
421 // jdk.internal.loader.ClassLoaders$AppClassLoader
422 // with the following assumptions (based on the JDK core library source code):
423 //
424 // [a] these two loaders use the BuiltinClassLoader.loadClassOrNull() to
425 // load the named class.
426 // [b] BuiltinClassLoader.loadClassOrNull() first calls findLoadedClass(name).
427 // [c] At this point, if we can find the named class inside the
428 // shared_dictionary, we can perform further checks (see
429 // SystemDictionary::is_shared_class_visible) to ensure that this class
430 // was loaded by the same class loader during dump time.
431 //
432 // Given these assumptions, we intercept the findLoadedClass() call to invoke
433 // SystemDictionaryShared::find_or_load_shared_class() to load the shared class from
434 // the archive for the 2 built-in class loaders. This way,
435 // we can improve start-up because we avoid decoding the classfile,
436 // and avoid delegating to the parent loader.
437 //
438 // NOTE: there's a lot of assumption about the Java code. If any of that change, this
439 // needs to be redesigned.
440
441 InstanceKlass* SystemDictionaryShared::find_or_load_shared_class(
442 Symbol* name, Handle class_loader, TRAPS) {
443 InstanceKlass* k = nullptr;
444 if (CDSConfig::is_using_archive()) {
445 if (!has_platform_or_app_classes()) {
446 return nullptr;
447 }
448
449 if (SystemDictionary::is_system_class_loader(class_loader()) ||
450 SystemDictionary::is_platform_class_loader(class_loader())) {
451 // Fix for 4474172; see evaluation for more details
452 class_loader = Handle(
453 THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
454 ClassLoaderData *loader_data = register_loader(class_loader);
455 Dictionary* dictionary = loader_data->dictionary();
456
457 // Note: currently, find_or_load_shared_class is called only from
458 // JVM_FindLoadedClass and used for PlatformClassLoader and AppClassLoader,
459 // which are parallel-capable loaders, so a lock here is NOT taken.
460 assert(get_loader_lock_or_null(class_loader) == nullptr, "ObjectLocker not required");
461 {
462 MutexLocker mu(THREAD, SystemDictionary_lock);
463 InstanceKlass* check = dictionary->find_class(THREAD, name);
464 if (check != nullptr) {
465 return check;
466 }
467 }
468
469 k = load_shared_class_for_builtin_loader(name, class_loader, THREAD);
470 if (k != nullptr) {
471 SharedClassLoadingMark slm(THREAD, k);
472 k = find_or_define_instance_class(name, class_loader, k, CHECK_NULL);
473 }
474 }
475 }
476 return k;
477 }
478
479 class UnregisteredClassesTable : public ResourceHashtable<
480 Symbol*, InstanceKlass*,
481 15889, // prime number
482 AnyObj::C_HEAP> {};
483
484 static UnregisteredClassesTable* _unregistered_classes_table = nullptr;
485
486 // true == class was successfully added; false == a duplicated class (with the same name) already exists.
487 bool SystemDictionaryShared::add_unregistered_class(Thread* current, InstanceKlass* klass) {
488 // We don't allow duplicated unregistered classes with the same name.
489 // We only archive the first class with that name that succeeds putting
490 // itself into the table.
491 assert(CDSConfig::is_dumping_archive() || ClassListWriter::is_enabled(), "sanity");
492 MutexLocker ml(current, UnregisteredClassesTable_lock, Mutex::_no_safepoint_check_flag);
493 Symbol* name = klass->name();
494 if (_unregistered_classes_table == nullptr) {
495 _unregistered_classes_table = new (mtClass)UnregisteredClassesTable();
496 }
497 bool created;
498 InstanceKlass** v = _unregistered_classes_table->put_if_absent(name, klass, &created);
499 if (created) {
500 name->increment_refcount();
501 }
502 return (klass == *v);
503 }
504
505 // This function is called to lookup the super/interfaces of shared classes for
506 // unregistered loaders. E.g., SharedClass in the below example
507 // where "super:" (and optionally "interface:") have been specified.
508 //
509 // java/lang/Object id: 0
510 // Interface id: 2 super: 0 source: cust.jar
511 // SharedClass id: 4 super: 0 interfaces: 2 source: cust.jar
512 InstanceKlass* SystemDictionaryShared::lookup_super_for_unregistered_class(
513 Symbol* class_name, Symbol* super_name, bool is_superclass) {
514
515 assert(CDSConfig::is_dumping_static_archive(), "only when static dumping");
516
517 if (!ClassListParser::is_parsing_thread()) {
518 // Unregistered classes can be created only by ClassListParser::_parsing_thread.
519
520 return nullptr;
521 }
522
523 ClassListParser* parser = ClassListParser::instance();
524 if (parser == nullptr) {
525 // We're still loading the well-known classes, before the ClassListParser is created.
526 return nullptr;
527 }
528 if (class_name->equals(parser->current_class_name())) {
529 // When this function is called, all the numbered super and interface types
530 // must have already been loaded. Hence this function is never recursively called.
531 if (is_superclass) {
532 return parser->lookup_super_for_current_class(super_name);
533 } else {
534 return parser->lookup_interface_for_current_class(super_name);
535 }
536 } else {
537 // The VM is not trying to resolve a super type of parser->current_class_name().
538 // Instead, it's resolving an error class (because parser->current_class_name() has
539 // failed parsing or verification). Don't do anything here.
540 return nullptr;
541 }
542 }
543
544 void SystemDictionaryShared::set_shared_class_misc_info(InstanceKlass* k, ClassFileStream* cfs) {
545 assert(CDSConfig::is_dumping_archive(), "sanity");
546 assert(!is_builtin(k), "must be unregistered class");
547 DumpTimeClassInfo* info = get_info(k);
548 info->_clsfile_size = cfs->length();
549 info->_clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
550 }
551
552 void SystemDictionaryShared::initialize() {
553 if (CDSConfig::is_dumping_archive()) {
554 _dumptime_table = new (mtClass) DumpTimeSharedClassTable;
555 _dumptime_lambda_proxy_class_dictionary =
556 new (mtClass) DumpTimeLambdaProxyClassDictionary;
557 }
558 }
559
560 void SystemDictionaryShared::init_dumptime_info(InstanceKlass* k) {
561 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
562 assert(SystemDictionaryShared::class_loading_may_happen(), "sanity");
563 DumpTimeClassInfo* info = _dumptime_table->allocate_info(k);
564 if (_ignore_new_classes) {
565 if (!LambdaFormInvokers::may_be_regenerated_class(k->name())) {
566 ResourceMark rm;
567 log_debug(cds)("Skipping %s: Class loaded for lambda form invoker regeneration", k->name()->as_C_string());
568 info->set_excluded();
569 }
570 }
571 }
572
573 void SystemDictionaryShared::remove_dumptime_info(InstanceKlass* k) {
574 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
575 _dumptime_table->remove(k);
576 }
577
578 void SystemDictionaryShared::handle_class_unloading(InstanceKlass* klass) {
579 if (CDSConfig::is_dumping_archive()) {
580 remove_dumptime_info(klass);
581 }
582
583 if (CDSConfig::is_dumping_archive() || ClassListWriter::is_enabled()) {
584 MutexLocker ml(Thread::current(), UnregisteredClassesTable_lock, Mutex::_no_safepoint_check_flag);
585 if (_unregistered_classes_table != nullptr) {
586 // Remove the class from _unregistered_classes_table: keep the entry but
587 // set it to null. This ensure no classes with the same name can be
588 // added again.
589 InstanceKlass** v = _unregistered_classes_table->get(klass->name());
590 if (v != nullptr) {
591 *v = nullptr;
592 }
593 }
594 } else {
595 assert(_unregistered_classes_table == nullptr, "must not be used");
596 }
597
598 if (ClassListWriter::is_enabled()) {
599 ClassListWriter cw;
600 cw.handle_class_unloading((const InstanceKlass*)klass);
601 }
602 }
603
604 // Check if a class or any of its supertypes has been redefined.
605 bool SystemDictionaryShared::has_been_redefined(InstanceKlass* k) {
606 if (k->has_been_redefined()) {
607 return true;
608 }
609 if (k->java_super() != nullptr && has_been_redefined(k->java_super())) {
610 return true;
611 }
612 Array<InstanceKlass*>* interfaces = k->local_interfaces();
613 int len = interfaces->length();
614 for (int i = 0; i < len; i++) {
615 if (has_been_redefined(interfaces->at(i))) {
616 return true;
617 }
618 }
619 return false;
620 }
621
622 // k is a class before relocating by ArchiveBuilder
623 void SystemDictionaryShared::validate_before_archiving(InstanceKlass* k) {
624 ResourceMark rm;
625 const char* name = k->name()->as_C_string();
626 DumpTimeClassInfo* info = _dumptime_table->get(k);
627 assert(!class_loading_may_happen(), "class loading must be disabled");
628 guarantee(info != nullptr, "Class %s must be entered into _dumptime_table", name);
629 guarantee(!info->is_excluded(), "Should not attempt to archive excluded class %s", name);
630 if (is_builtin(k)) {
631 if (k->is_hidden()) {
632 if (CDSConfig::is_dumping_invokedynamic()) { // FIXME -- clean up
633 return;
634 }
635 assert(should_hidden_class_be_archived(k), "unexpected hidden class %s", name);
636 }
637 guarantee(!k->is_shared_unregistered_class(),
638 "Class loader type must be set for BUILTIN class %s", name);
639
640 } else {
641 guarantee(k->is_shared_unregistered_class(),
642 "Class loader type must not be set for UNREGISTERED class %s", name);
643 }
644 }
645
646 class UnregisteredClassesDuplicationChecker : StackObj {
647 GrowableArray<InstanceKlass*> _list;
648 Thread* _thread;
649 public:
650 UnregisteredClassesDuplicationChecker() : _thread(Thread::current()) {}
651
652 void do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
653 if (!SystemDictionaryShared::is_builtin(k)) {
654 _list.append(k);
655 }
656 }
657
658 static int compare_by_loader(InstanceKlass** a, InstanceKlass** b) {
659 ClassLoaderData* loader_a = a[0]->class_loader_data();
660 ClassLoaderData* loader_b = b[0]->class_loader_data();
661
662 if (loader_a != loader_b) {
663 return primitive_compare(loader_a, loader_b);
664 } else {
665 return primitive_compare(a[0], b[0]);
666 }
667 }
668
669 void mark_duplicated_classes() {
670 // Two loaders may load two identical or similar hierarchies of classes. If we
671 // check for duplication in random order, we may end up excluding important base classes
672 // in both hierarchies, causing most of the classes to be excluded.
673 // We sort the classes by their loaders. This way we're likely to archive
674 // all classes in the one of the two hierarchies.
675 _list.sort(compare_by_loader);
676 for (int i = 0; i < _list.length(); i++) {
677 InstanceKlass* k = _list.at(i);
678 bool i_am_first = SystemDictionaryShared::add_unregistered_class(_thread, k);
679 if (!i_am_first) {
680 SystemDictionaryShared::warn_excluded(k, "Duplicated unregistered class");
681 SystemDictionaryShared::set_excluded_locked(k);
682 }
683 }
684 }
685 };
686
687 void SystemDictionaryShared::scan_constant_pool(InstanceKlass* k) {
688 k->constants()->find_archivable_hidden_classes();
689 }
690
691 bool SystemDictionaryShared::should_hidden_class_be_archived(InstanceKlass* k) {
692 assert(k->is_hidden(), "sanity");
693 if (is_registered_lambda_proxy_class(k)) {
694 return true;
695 }
696
697 if (CDSConfig::is_dumping_invokedynamic()) {
698 if (HeapShared::is_archivable_hidden_klass(k)) {
699 return true;
700 }
701
702 // TODO: merge the following with HeapShared::is_archivable_hidden_klass()
703 DumpTimeClassInfo* info = _dumptime_table->get(k);
704 if (info != nullptr && info->is_required()) {
705 return true;
706 }
707 }
708
709 return false;
710 }
711
712 // Returns true if the class should be excluded. This can be called before
713 // SystemDictionaryShared::find_all_archivable_classes().
714 bool SystemDictionaryShared::check_for_exclusion(Klass* k) {
715 assert(CDSConfig::is_dumping_archive(), "sanity");
716
717 if (k->is_objArray_klass()) {
718 return check_for_exclusion(ObjArrayKlass::cast(k)->bottom_klass());
719 }
720
721 if (!k->is_instance_klass()) {
722 return false;
723 } else {
724 InstanceKlass* ik = InstanceKlass::cast(k);
725
726 if (SafepointSynchronize::is_at_safepoint()) {
727 return is_excluded_class(ik);
728 }
729
730 if (!ik->is_linked()) {
731 JavaThread* THREAD = JavaThread::current();
732 ik->link_class(THREAD);
733 if (HAS_PENDING_EXCEPTION) {
734 CLEAR_PENDING_EXCEPTION;
735 return true;
736 }
737 }
738
739 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
740 DumpTimeClassInfo* p = get_info_locked(ik);
741 if (p->is_excluded()) {
742 return true;
743 }
744 return check_for_exclusion(ik, p);
745 }
746 }
747
748 void SystemDictionaryShared::find_all_archivable_classes() {
749 HeapShared::start_finding_archivable_hidden_classes();
750 find_all_archivable_classes_impl();
751 HeapShared::end_finding_archivable_hidden_classes();
752 }
753
754 // Iterate over all the classes in _dumptime_table, marking the ones that must be
755 // excluded from the archive. Those that are not excluded will be archivable.
756 //
757 // (a) Non-hidden classes are easy. They are only check by the rules in
758 // SystemDictionaryShared::check_for_exclusion().
759 // (b) For hidden classes, we only archive those that are required (i.e., they are
760 // referenced by Java objects (such as CallSites) that are reachable from
761 // ConstantPools.
762 void SystemDictionaryShared::find_all_archivable_classes_impl() {
763 assert(!class_loading_may_happen(), "class loading must be disabled");
764 assert_lock_strong(DumpTimeTable_lock);
765
766 if (CDSConfig::is_dumping_dynamic_archive()) {
767 // Do this first -- if a base class is excluded due to duplication,
768 // all of its subclasses will also be excluded.
769 ResourceMark rm;
770 UnregisteredClassesDuplicationChecker dup_checker;
771 _dumptime_table->iterate_all_live_classes(&dup_checker);
772 dup_checker.mark_duplicated_classes();
773 }
774
775 ResourceMark rm;
776
777 // First, scan all non-hidden classes
778 auto check_non_hidden = [&] (InstanceKlass* k, DumpTimeClassInfo& info) {
779 if (!k->is_hidden()) {
780 SystemDictionaryShared::check_for_exclusion(k, &info);
781 if (!info.is_excluded() && !info.has_scanned_constant_pool()) {
782 scan_constant_pool(k);
783 info.set_has_scanned_constant_pool();
784 }
785 }
786 };
787 _dumptime_table->iterate_all_live_classes(check_non_hidden);
788
789 // Then, scan all the hidden classes that have been marked as required to
790 // discover more hidden classes. Stop when we cannot make progress anymore.
791 bool made_progress;
792 do {
793 made_progress = false;
794 auto check_hidden = [&] (InstanceKlass* k, DumpTimeClassInfo& info) {
795 if (k->is_hidden() && should_hidden_class_be_archived(k)) {
796 SystemDictionaryShared::check_for_exclusion(k, &info);
797 if (info.is_excluded()) {
798 guarantee(!info.is_required(), "A required hidden class cannot be marked as excluded");
799 } else if (!info.has_scanned_constant_pool()) {
800 scan_constant_pool(k);
801 info.set_has_scanned_constant_pool();
802 // The CP entries in k *MAY* refer to other hidden classes, so scan
803 // every hidden class again.
804 made_progress = true;
805 }
806 }
807 };
808 _dumptime_table->iterate_all_live_classes(check_hidden);
809 } while (made_progress);
810
811 // Now, all hidden classes that have not yet been scanned must be marked as excluded
812 auto exclude_remaining_hidden = [&] (InstanceKlass* k, DumpTimeClassInfo& info) {
813 if (k->is_hidden() && !info.has_checked_exclusion()) {
814 SystemDictionaryShared::check_for_exclusion(k, &info);
815 guarantee(info.is_excluded(), "Must be");
816 }
817 };
818 _dumptime_table->iterate_all_live_classes(exclude_remaining_hidden);
819 _dumptime_table->update_counts();
820
821 cleanup_lambda_proxy_class_dictionary();
822
823 TrainingData::cleanup_training_data();
824 }
825
826 bool SystemDictionaryShared::is_excluded_class(InstanceKlass* k) {
827 assert(!class_loading_may_happen(), "class loading must be disabled");
828 assert_lock_strong(DumpTimeTable_lock);
829 assert(CDSConfig::is_dumping_archive(), "sanity");
830 DumpTimeClassInfo* p = get_info_locked(k);
831 return p->is_excluded();
832 }
833
834 void SystemDictionaryShared::set_excluded_locked(InstanceKlass* k) {
835 assert_lock_strong(DumpTimeTable_lock);
836 assert(CDSConfig::is_dumping_archive(), "sanity");
837 DumpTimeClassInfo* info = get_info_locked(k);
838 info->set_excluded();
839 }
840
841 void SystemDictionaryShared::set_excluded(InstanceKlass* k) {
842 assert(CDSConfig::is_dumping_archive(), "sanity");
843 DumpTimeClassInfo* info = get_info(k);
844 info->set_excluded();
845 }
846
847 void SystemDictionaryShared::set_class_has_failed_verification(InstanceKlass* ik) {
848 assert(CDSConfig::is_dumping_archive(), "sanity");
849 DumpTimeClassInfo* p = get_info(ik);
850 p->set_failed_verification();
851 }
852
853 bool SystemDictionaryShared::has_class_failed_verification(InstanceKlass* ik) {
854 assert(CDSConfig::is_dumping_archive(), "sanity");
855 DumpTimeClassInfo* p = _dumptime_table->get(ik);
856 return (p == nullptr) ? false : p->failed_verification();
857 }
858
859 void SystemDictionaryShared::dumptime_classes_do(class MetaspaceClosure* it) {
860 assert_lock_strong(DumpTimeTable_lock);
861
862 auto do_klass = [&] (InstanceKlass* k, DumpTimeClassInfo& info) {
863 if (CDSConfig::is_dumping_final_static_archive() && !k->is_loaded()) {
864 assert(k->is_shared_unregistered_class(), "must be");
865 info.metaspace_pointers_do(it);
866 } else if (k->is_loader_alive() && !info.is_excluded()) {
867 info.metaspace_pointers_do(it);
868 }
869 };
870 _dumptime_table->iterate_all_live_classes(do_klass);
871
872 auto do_lambda = [&] (LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
873 if (key.caller_ik()->is_loader_alive()) {
874 info.metaspace_pointers_do(it);
875 key.metaspace_pointers_do(it);
876 }
877 };
878 _dumptime_lambda_proxy_class_dictionary->iterate_all(do_lambda);
879 }
880
881 bool SystemDictionaryShared::add_verification_constraint(InstanceKlass* k, Symbol* name,
882 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
883 assert(CDSConfig::is_dumping_archive(), "sanity");
884 if (CDSConfig::is_dumping_dynamic_archive() && k->is_shared()) {
885 // k is a new class in the static archive, but one of its supertypes is an old class, so k wasn't
886 // verified during dump time. No need to record constraints as k won't be included in the dynamic archive.
887 return false;
888 }
889 if (CDSConfig::is_dumping_aot_linked_classes() && is_builtin(k)) {
890 // There's no need to save verification constraints
891 // TODO -- double check the logic before integrating into mainline!!
892 return false;
893 }
894
895 DumpTimeClassInfo* info = get_info(k);
896 info->add_verification_constraint(k, name, from_name, from_field_is_protected,
897 from_is_array, from_is_object);
898
899 if (CDSConfig::is_dumping_dynamic_archive()) {
900 // For dynamic dumping, we can resolve all the constraint classes for all class loaders during
901 // the initial run prior to creating the archive before vm exit. We will also perform verification
902 // check when running with the archive.
903 return false;
904 } else {
905 if (is_builtin(k)) {
906 // For builtin class loaders, we can try to complete the verification check at dump time,
907 // because we can resolve all the constraint classes. We will also perform verification check
908 // when running with the archive.
909 return false;
910 } else {
911 // For non-builtin class loaders, we cannot complete the verification check at dump time,
912 // because at dump time we don't know how to resolve classes for such loaders.
913 return true;
914 }
915 }
916 }
917
918 void SystemDictionaryShared::add_enum_klass_static_field(InstanceKlass* ik, int root_index) {
919 assert(CDSConfig::is_dumping_heap(), "sanity");
920 DumpTimeClassInfo* info = get_info_locked(ik);
921 info->add_enum_klass_static_field(root_index);
922 }
923
924 void SystemDictionaryShared::add_to_dump_time_lambda_proxy_class_dictionary(LambdaProxyClassKey& key,
925 InstanceKlass* proxy_klass) {
926 assert_lock_strong(DumpTimeTable_lock);
927
928 bool created;
929 DumpTimeLambdaProxyClassInfo* info = _dumptime_lambda_proxy_class_dictionary->put_if_absent(key, &created);
930 info->add_proxy_klass(proxy_klass);
931 if (created) {
932 ++_dumptime_lambda_proxy_class_dictionary->_count;
933 }
934 }
935
936 void SystemDictionaryShared::add_lambda_proxy_class(InstanceKlass* caller_ik,
937 InstanceKlass* lambda_ik,
938 Symbol* invoked_name,
939 Symbol* invoked_type,
940 Symbol* method_type,
941 Method* member_method,
942 Symbol* instantiated_method_type,
943 TRAPS) {
944 if (CDSConfig::is_dumping_invokedynamic()) {
945 // The lambda proxy classes will be stored as part of aot-resolved constant pool entries.
946 // There's no need to remember them in a separate table.
947 return;
948 }
949 if (CDSConfig::is_dumping_preimage_static_archive() || CDSConfig::is_dumping_final_static_archive()) {
950 // TODO: not supported in new workflow
951 return;
952 }
953
954 assert(caller_ik->class_loader() == lambda_ik->class_loader(), "mismatched class loader");
955 assert(caller_ik->class_loader_data() == lambda_ik->class_loader_data(), "mismatched class loader data");
956 assert(java_lang_Class::class_data(lambda_ik->java_mirror()) == nullptr, "must not have class data");
957
958 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
959
960 lambda_ik->assign_class_loader_type();
961 lambda_ik->set_shared_classpath_index(caller_ik->shared_classpath_index());
962 InstanceKlass* nest_host = caller_ik->nest_host(CHECK);
963 assert(nest_host != nullptr, "unexpected nullptr nest_host");
964
965 DumpTimeClassInfo* info = _dumptime_table->get(lambda_ik);
966 if (info != nullptr && !lambda_ik->is_non_strong_hidden() && is_builtin(lambda_ik) && is_builtin(caller_ik)
967 // Don't include the lambda proxy if its nest host is not in the "linked" state.
968 && nest_host->is_linked()) {
969 // Set _is_archived_lambda_proxy in DumpTimeClassInfo so that the lambda_ik
970 // won't be excluded during dumping of shared archive. See ExcludeDumpTimeSharedClasses.
971 info->_is_archived_lambda_proxy = true;
972 info->set_nest_host(nest_host);
973
974 LambdaProxyClassKey key(caller_ik,
975 invoked_name,
976 invoked_type,
977 method_type,
978 member_method,
979 instantiated_method_type);
980 add_to_dump_time_lambda_proxy_class_dictionary(key, lambda_ik);
981 }
982 }
983
984 InstanceKlass* SystemDictionaryShared::get_shared_lambda_proxy_class(InstanceKlass* caller_ik,
985 Symbol* invoked_name,
986 Symbol* invoked_type,
987 Symbol* method_type,
988 Method* member_method,
989 Symbol* instantiated_method_type) {
990 if (CDSConfig::is_dumping_final_static_archive()) {
991 return nullptr;
992 }
993 MutexLocker ml(CDSLambda_lock, Mutex::_no_safepoint_check_flag);
994 LambdaProxyClassKey key(caller_ik, invoked_name, invoked_type,
995 method_type, member_method, instantiated_method_type);
996
997 // Try to retrieve the lambda proxy class from static archive.
998 const RunTimeLambdaProxyClassInfo* info = _static_archive.lookup_lambda_proxy_class(&key);
999 InstanceKlass* proxy_klass = retrieve_lambda_proxy_class(info);
1000 if (proxy_klass == nullptr) {
1001 if (info != nullptr && log_is_enabled(Debug, cds)) {
1002 ResourceMark rm;
1003 log_debug(cds)("Used all static archived lambda proxy classes for: %s %s%s",
1004 caller_ik->external_name(), invoked_name->as_C_string(), invoked_type->as_C_string());
1005 }
1006 } else {
1007 return proxy_klass;
1008 }
1009
1010 // Retrieving from static archive is unsuccessful, try dynamic archive.
1011 info = _dynamic_archive.lookup_lambda_proxy_class(&key);
1012 proxy_klass = retrieve_lambda_proxy_class(info);
1013 if (proxy_klass == nullptr) {
1014 if (info != nullptr && log_is_enabled(Debug, cds)) {
1015 ResourceMark rm;
1016 log_debug(cds)("Used all dynamic archived lambda proxy classes for: %s %s%s",
1017 caller_ik->external_name(), invoked_name->as_C_string(), invoked_type->as_C_string());
1018 }
1019 }
1020 return proxy_klass;
1021 }
1022
1023 InstanceKlass* SystemDictionaryShared::retrieve_lambda_proxy_class(const RunTimeLambdaProxyClassInfo* info) {
1024 InstanceKlass* proxy_klass = nullptr;
1025 if (info != nullptr) {
1026 InstanceKlass* curr_klass = info->proxy_klass_head();
1027 InstanceKlass* prev_klass = curr_klass;
1028 if (curr_klass->lambda_proxy_is_available()) {
1029 while (curr_klass->next_link() != nullptr) {
1030 prev_klass = curr_klass;
1031 curr_klass = InstanceKlass::cast(curr_klass->next_link());
1032 }
1033 assert(curr_klass->is_hidden(), "must be");
1034 assert(curr_klass->lambda_proxy_is_available(), "must be");
1035
1036 prev_klass->set_next_link(nullptr);
1037 proxy_klass = curr_klass;
1038 proxy_klass->clear_lambda_proxy_is_available();
1039 if (log_is_enabled(Debug, cds)) {
1040 ResourceMark rm;
1041 log_debug(cds)("Loaded lambda proxy: " PTR_FORMAT " %s ", p2i(proxy_klass), proxy_klass->external_name());
1042 }
1043 }
1044 }
1045 return proxy_klass;
1046 }
1047
1048 InstanceKlass* SystemDictionaryShared::get_shared_nest_host(InstanceKlass* lambda_ik) {
1049 assert(!CDSConfig::is_dumping_static_archive() && CDSConfig::is_using_archive(), "called at run time with CDS enabled only");
1050 RunTimeClassInfo* record = RunTimeClassInfo::get_for(lambda_ik);
1051 return record->nest_host();
1052 }
1053
1054 InstanceKlass* SystemDictionaryShared::prepare_shared_lambda_proxy_class(InstanceKlass* lambda_ik,
1055 InstanceKlass* caller_ik, TRAPS) {
1056 Handle class_loader(THREAD, caller_ik->class_loader());
1057 Handle protection_domain;
1058 PackageEntry* pkg_entry = caller_ik->package();
1059 if (caller_ik->class_loader() != nullptr) {
1060 protection_domain = CDSProtectionDomain::init_security_info(class_loader, caller_ik, pkg_entry, CHECK_NULL);
1061 }
1062
1063 InstanceKlass* shared_nest_host = get_shared_nest_host(lambda_ik);
1064 assert(shared_nest_host != nullptr, "unexpected nullptr _nest_host");
1065
1066 InstanceKlass* loaded_lambda =
1067 SystemDictionary::load_shared_lambda_proxy_class(lambda_ik, class_loader, protection_domain, pkg_entry, CHECK_NULL);
1068
1069 if (loaded_lambda == nullptr) {
1070 return nullptr;
1071 }
1072
1073 // Ensures the nest host is the same as the lambda proxy's
1074 // nest host recorded at dump time.
1075 InstanceKlass* nest_host = caller_ik->nest_host(THREAD);
1076 assert(nest_host == shared_nest_host, "mismatched nest host");
1077
1078 EventClassLoad class_load_start_event;
1079
1080 // Add to class hierarchy, and do possible deoptimizations.
1081 loaded_lambda->add_to_hierarchy(THREAD);
1082 // But, do not add to dictionary.
1083
1084 loaded_lambda->link_class(CHECK_NULL);
1085 // notify jvmti
1086 if (JvmtiExport::should_post_class_load()) {
1087 JvmtiExport::post_class_load(THREAD, loaded_lambda);
1088 }
1089 if (class_load_start_event.should_commit()) {
1090 SystemDictionary::post_class_load_event(&class_load_start_event, loaded_lambda, ClassLoaderData::class_loader_data(class_loader()));
1091 }
1092
1093 loaded_lambda->initialize(CHECK_NULL);
1094
1095 return loaded_lambda;
1096 }
1097
1098 void SystemDictionaryShared::check_verification_constraints(InstanceKlass* klass,
1099 TRAPS) {
1100 //assert(!CDSConfig::is_dumping_static_archive() && CDSConfig::is_using_archive(), "called at run time with CDS enabled only");
1101 RunTimeClassInfo* record = RunTimeClassInfo::get_for(klass);
1102
1103 int length = record->_num_verifier_constraints;
1104 if (length > 0) {
1105 for (int i = 0; i < length; i++) {
1106 RunTimeClassInfo::RTVerifierConstraint* vc = record->verifier_constraint_at(i);
1107 Symbol* name = vc->name();
1108 Symbol* from_name = vc->from_name();
1109 char c = record->verifier_constraint_flag(i);
1110
1111 if (log_is_enabled(Trace, cds, verification)) {
1112 ResourceMark rm(THREAD);
1113 log_trace(cds, verification)("check_verification_constraint: %s: %s must be subclass of %s [0x%x]",
1114 klass->external_name(), from_name->as_klass_external_name(),
1115 name->as_klass_external_name(), c);
1116 }
1117
1118 bool from_field_is_protected = (c & SystemDictionaryShared::FROM_FIELD_IS_PROTECTED) ? true : false;
1119 bool from_is_array = (c & SystemDictionaryShared::FROM_IS_ARRAY) ? true : false;
1120 bool from_is_object = (c & SystemDictionaryShared::FROM_IS_OBJECT) ? true : false;
1121
1122 bool ok = VerificationType::resolve_and_check_assignability(klass, name,
1123 from_name, from_field_is_protected, from_is_array, from_is_object, CHECK);
1124 if (!ok) {
1125 ResourceMark rm(THREAD);
1126 stringStream ss;
1127
1128 ss.print_cr("Bad type on operand stack");
1129 ss.print_cr("Exception Details:");
1130 ss.print_cr(" Location:\n %s", klass->name()->as_C_string());
1131 ss.print_cr(" Reason:\n Type '%s' is not assignable to '%s'",
1132 from_name->as_quoted_ascii(), name->as_quoted_ascii());
1133 THROW_MSG(vmSymbols::java_lang_VerifyError(), ss.as_string());
1134 }
1135 }
1136 }
1137 }
1138
1139 static oop get_class_loader_by(char type) {
1140 if (type == (char)ClassLoader::BOOT_LOADER) {
1141 return (oop)nullptr;
1142 } else if (type == (char)ClassLoader::PLATFORM_LOADER) {
1143 return SystemDictionary::java_platform_loader();
1144 } else {
1145 assert (type == (char)ClassLoader::APP_LOADER, "Sanity");
1146 return SystemDictionary::java_system_loader();
1147 }
1148 }
1149
1150 // Record class loader constraints that are checked inside
1151 // InstanceKlass::link_class(), so that these can be checked quickly
1152 // at runtime without laying out the vtable/itables.
1153 void SystemDictionaryShared::record_linking_constraint(Symbol* name, InstanceKlass* klass,
1154 Handle loader1, Handle loader2) {
1155 // A linking constraint check is executed when:
1156 // - klass extends or implements type S
1157 // - klass overrides method S.M(...) with X.M
1158 // - If klass defines the method M, X is
1159 // the same as klass.
1160 // - If klass does not define the method M,
1161 // X must be a supertype of klass and X.M is
1162 // a default method defined by X.
1163 // - loader1 = X->class_loader()
1164 // - loader2 = S->class_loader()
1165 // - loader1 != loader2
1166 // - M's parameter(s) include an object type T
1167 // We require that
1168 // - whenever loader1 and loader2 try to
1169 // resolve the type T, they must always resolve to
1170 // the same InstanceKlass.
1171 // NOTE: type T may or may not be currently resolved in
1172 // either of these two loaders. The check itself does not
1173 // try to resolve T.
1174 oop klass_loader = klass->class_loader();
1175
1176 if (!is_system_class_loader(klass_loader) &&
1177 !is_platform_class_loader(klass_loader)) {
1178 // If klass is loaded by system/platform loaders, we can
1179 // guarantee that klass and S must be loaded by the same
1180 // respective loader between dump time and run time, and
1181 // the exact same check on (name, loader1, loader2) will
1182 // be executed. Hence, we can cache this check and execute
1183 // it at runtime without walking the vtable/itables.
1184 //
1185 // This cannot be guaranteed for classes loaded by other
1186 // loaders, so we bail.
1187 return;
1188 }
1189
1190 assert(is_builtin(klass), "must be");
1191 assert(klass_loader != nullptr, "should not be called for boot loader");
1192 assert(loader1 != loader2, "must be");
1193
1194 if (CDSConfig::is_dumping_dynamic_archive() && Thread::current()->is_VM_thread()) {
1195 // We are re-laying out the vtable/itables of the *copy* of
1196 // a class during the final stage of dynamic dumping. The
1197 // linking constraints for this class has already been recorded.
1198 return;
1199 }
1200 assert(!Thread::current()->is_VM_thread(), "must be");
1201
1202 assert(CDSConfig::is_dumping_archive(), "sanity");
1203 DumpTimeClassInfo* info = get_info(klass);
1204 info->record_linking_constraint(name, loader1, loader2);
1205 }
1206
1207 // returns true IFF there's no need to re-initialize the i/v-tables for klass for
1208 // the purpose of checking class loader constraints.
1209 bool SystemDictionaryShared::check_linking_constraints(Thread* current, InstanceKlass* klass) {
1210 //assert(!CDSConfig::is_dumping_static_archive() && CDSConfig::is_using_archive(), "called at run time with CDS enabled only");
1211 LogTarget(Info, class, loader, constraints) log;
1212 if (klass->is_shared_boot_class()) {
1213 // No class loader constraint check performed for boot classes.
1214 return true;
1215 }
1216 if (klass->is_shared_platform_class() || klass->is_shared_app_class()) {
1217 RunTimeClassInfo* info = RunTimeClassInfo::get_for(klass);
1218 assert(info != nullptr, "Sanity");
1219 if (info->_num_loader_constraints > 0) {
1220 HandleMark hm(current);
1221 for (int i = 0; i < info->_num_loader_constraints; i++) {
1222 RunTimeClassInfo::RTLoaderConstraint* lc = info->loader_constraint_at(i);
1223 Symbol* name = lc->constraint_name();
1224 Handle loader1(current, get_class_loader_by(lc->_loader_type1));
1225 Handle loader2(current, get_class_loader_by(lc->_loader_type2));
1226 if (log.is_enabled()) {
1227 ResourceMark rm(current);
1228 log.print("[CDS add loader constraint for class %s symbol %s loader[0] %s loader[1] %s",
1229 klass->external_name(), name->as_C_string(),
1230 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1231 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
1232 }
1233 if (!SystemDictionary::add_loader_constraint(name, klass, loader1, loader2)) {
1234 // Loader constraint violation has been found. The caller
1235 // will re-layout the vtable/itables to produce the correct
1236 // exception.
1237 if (log.is_enabled()) {
1238 log.print(" failed]");
1239 }
1240 return false;
1241 }
1242 if (log.is_enabled()) {
1243 log.print(" succeeded]");
1244 }
1245 }
1246 return true; // for all recorded constraints added successfully.
1247 }
1248 }
1249 if (log.is_enabled()) {
1250 ResourceMark rm(current);
1251 log.print("[CDS has not recorded loader constraint for class %s]", klass->external_name());
1252 }
1253 return false;
1254 }
1255
1256 bool SystemDictionaryShared::is_supported_invokedynamic(BootstrapInfo* bsi) {
1257 LogTarget(Debug, cds, lambda) log;
1258 if (bsi->arg_values() == nullptr || !bsi->arg_values()->is_objArray()) {
1259 if (log.is_enabled()) {
1260 LogStream log_stream(log);
1261 log.print("bsi check failed");
1262 log.print(" bsi->arg_values().not_null() %d", bsi->arg_values().not_null());
1263 if (bsi->arg_values().not_null()) {
1264 log.print(" bsi->arg_values()->is_objArray() %d", bsi->arg_values()->is_objArray());
1265 bsi->print_msg_on(&log_stream);
1266 }
1267 }
1268 return false;
1269 }
1270
1271 Handle bsm = bsi->bsm();
1272 if (bsm.is_null() || !java_lang_invoke_DirectMethodHandle::is_instance(bsm())) {
1273 if (log.is_enabled()) {
1274 log.print("bsm check failed");
1275 log.print(" bsm.is_null() %d", bsm.is_null());
1276 log.print(" java_lang_invoke_DirectMethodHandle::is_instance(bsm()) %d",
1277 java_lang_invoke_DirectMethodHandle::is_instance(bsm()));
1278 }
1279 return false;
1280 }
1281
1282 oop mn = java_lang_invoke_DirectMethodHandle::member(bsm());
1283 Method* method = java_lang_invoke_MemberName::vmtarget(mn);
1284 if (method->klass_name()->equals("java/lang/invoke/LambdaMetafactory") &&
1285 method->name()->equals("metafactory") &&
1286 method->signature()->equals("(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;"
1287 "Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;"
1288 "Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;")) {
1289 return true;
1290 } else {
1291 if (log.is_enabled()) {
1292 ResourceMark rm;
1293 log.print("method check failed");
1294 log.print(" klass_name() %s", method->klass_name()->as_C_string());
1295 log.print(" name() %s", method->name()->as_C_string());
1296 log.print(" signature() %s", method->signature()->as_C_string());
1297 }
1298 }
1299
1300 return false;
1301 }
1302
1303 class EstimateSizeForArchive : StackObj {
1304 size_t _shared_class_info_size;
1305 int _num_builtin_klasses;
1306 int _num_unregistered_klasses;
1307
1308 public:
1309 EstimateSizeForArchive() {
1310 _shared_class_info_size = 0;
1311 _num_builtin_klasses = 0;
1312 _num_unregistered_klasses = 0;
1313 }
1314
1315 void do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
1316 if (!info.is_excluded()) {
1317 size_t byte_size = info.runtime_info_bytesize();
1318 _shared_class_info_size += align_up(byte_size, SharedSpaceObjectAlignment);
1319 }
1320 }
1321
1322 size_t total() {
1323 return _shared_class_info_size;
1324 }
1325 };
1326
1327 size_t SystemDictionaryShared::estimate_size_for_archive() {
1328 EstimateSizeForArchive est;
1329 _dumptime_table->iterate_all_live_classes(&est);
1330 size_t total_size = est.total() +
1331 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(true)) +
1332 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(false));
1333
1334 size_t bytesize = align_up(sizeof(RunTimeLambdaProxyClassInfo), SharedSpaceObjectAlignment);
1335 total_size +=
1336 (bytesize * _dumptime_lambda_proxy_class_dictionary->_count) +
1337 CompactHashtableWriter::estimate_size(_dumptime_lambda_proxy_class_dictionary->_count);
1338
1339 return total_size;
1340 }
1341
1342 unsigned int SystemDictionaryShared::hash_for_shared_dictionary(address ptr) {
1343 if (ArchiveBuilder::is_active() && ArchiveBuilder::current()->is_in_buffer_space(ptr)) {
1344 uintx offset = ArchiveBuilder::current()->any_to_offset(ptr);
1345 unsigned int hash = primitive_hash<uintx>(offset);
1346 DEBUG_ONLY({
1347 if (MetaspaceObj::is_shared((const MetaspaceObj*)ptr)) {
1348 assert(hash == SystemDictionaryShared::hash_for_shared_dictionary_quick(ptr), "must be");
1349 }
1350 });
1351 return hash;
1352 } else {
1353 return SystemDictionaryShared::hash_for_shared_dictionary_quick(ptr);
1354 }
1355 }
1356
1357 class CopyLambdaProxyClassInfoToArchive : StackObj {
1358 CompactHashtableWriter* _writer;
1359 ArchiveBuilder* _builder;
1360 public:
1361 CopyLambdaProxyClassInfoToArchive(CompactHashtableWriter* writer)
1362 : _writer(writer), _builder(ArchiveBuilder::current()) {}
1363 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1364 // In static dump, info._proxy_klasses->at(0) is already relocated to point to the archived class
1365 // (not the original class).
1366 //
1367 // The following check has been moved to SystemDictionaryShared::find_all_archivable_classes(), which
1368 // happens before the classes are copied.
1369 //
1370 // if (SystemDictionaryShared::is_excluded_class(info._proxy_klasses->at(0))) {
1371 // return true;
1372 //}
1373 ResourceMark rm;
1374 log_info(cds,dynamic)("Archiving hidden %s", info._proxy_klasses->at(0)->external_name());
1375 size_t byte_size = sizeof(RunTimeLambdaProxyClassInfo);
1376 RunTimeLambdaProxyClassInfo* runtime_info =
1377 (RunTimeLambdaProxyClassInfo*)ArchiveBuilder::ro_region_alloc(byte_size);
1378 runtime_info->init(key, info);
1379 unsigned int hash = runtime_info->hash();
1380 u4 delta = _builder->any_to_offset_u4((void*)runtime_info);
1381 _writer->add(hash, delta);
1382 return true;
1383 }
1384 };
1385
1386 class AdjustLambdaProxyClassInfo : StackObj {
1387 public:
1388 AdjustLambdaProxyClassInfo() {}
1389 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1390 int len = info._proxy_klasses->length();
1391 InstanceKlass* last_buff_k = nullptr;
1392
1393 for (int i = len - 1; i >= 0; i--) {
1394 InstanceKlass* orig_k = info._proxy_klasses->at(i);
1395 InstanceKlass* buff_k = ArchiveBuilder::current()->get_buffered_addr(orig_k);
1396 assert(ArchiveBuilder::current()->is_in_buffer_space(buff_k), "must be");
1397 buff_k->set_lambda_proxy_is_available();
1398 buff_k->set_next_link(last_buff_k);
1399 if (last_buff_k != nullptr) {
1400 ArchivePtrMarker::mark_pointer(buff_k->next_link_addr());
1401 }
1402 last_buff_k = buff_k;
1403 }
1404
1405 return true;
1406 }
1407 };
1408
1409 class CopySharedClassInfoToArchive : StackObj {
1410 CompactHashtableWriter* _writer;
1411 bool _is_builtin;
1412 ArchiveBuilder *_builder;
1413 public:
1414 CopySharedClassInfoToArchive(CompactHashtableWriter* writer,
1415 bool is_builtin)
1416 : _writer(writer), _is_builtin(is_builtin), _builder(ArchiveBuilder::current()) {}
1417
1418 void do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
1419 if (!info.is_excluded() && info.is_builtin() == _is_builtin) {
1420 size_t byte_size = info.runtime_info_bytesize();
1421 RunTimeClassInfo* record;
1422 record = (RunTimeClassInfo*)ArchiveBuilder::ro_region_alloc(byte_size);
1423 record->init(info);
1424
1425 unsigned int hash;
1426 Symbol* name = info._klass->name();
1427 name = ArchiveBuilder::current()->get_buffered_addr(name);
1428 hash = SystemDictionaryShared::hash_for_shared_dictionary((address)name);
1429 u4 delta = _builder->buffer_to_offset_u4((address)record);
1430 if (_is_builtin && info._klass->is_hidden()) {
1431 // skip
1432 } else {
1433 _writer->add(hash, delta);
1434 }
1435 if (log_is_enabled(Trace, cds, hashtables)) {
1436 ResourceMark rm;
1437 log_trace(cds,hashtables)("%s dictionary: %s", (_is_builtin ? "builtin" : "unregistered"), info._klass->external_name());
1438 }
1439
1440 // Save this for quick runtime lookup of InstanceKlass* -> RunTimeClassInfo*
1441 InstanceKlass* buffered_klass = ArchiveBuilder::current()->get_buffered_addr(info._klass);
1442 RunTimeClassInfo::set_for(buffered_klass, record);
1443 }
1444 }
1445 };
1446
1447 void SystemDictionaryShared::write_lambda_proxy_class_dictionary(LambdaProxyClassDictionary *dictionary) {
1448 CompactHashtableStats stats;
1449 dictionary->reset();
1450 CompactHashtableWriter writer(_dumptime_lambda_proxy_class_dictionary->_count, &stats);
1451 CopyLambdaProxyClassInfoToArchive copy(&writer);
1452 _dumptime_lambda_proxy_class_dictionary->iterate(©);
1453 writer.dump(dictionary, "lambda proxy class dictionary");
1454 }
1455
1456 void SystemDictionaryShared::write_dictionary(RunTimeSharedDictionary* dictionary,
1457 bool is_builtin) {
1458 CompactHashtableStats stats;
1459 dictionary->reset();
1460 CompactHashtableWriter writer(_dumptime_table->count_of(is_builtin), &stats);
1461 CopySharedClassInfoToArchive copy(&writer, is_builtin);
1462 assert_lock_strong(DumpTimeTable_lock);
1463 _dumptime_table->iterate_all_live_classes(©);
1464 writer.dump(dictionary, is_builtin ? "builtin dictionary" : "unregistered dictionary");
1465 }
1466
1467 void SystemDictionaryShared::write_to_archive(bool is_static_archive) {
1468 ArchiveInfo* archive = get_archive(is_static_archive);
1469
1470 write_dictionary(&archive->_builtin_dictionary, true);
1471 write_dictionary(&archive->_unregistered_dictionary, false);
1472
1473 write_lambda_proxy_class_dictionary(&archive->_lambda_proxy_class_dictionary);
1474 }
1475
1476 void SystemDictionaryShared::adjust_lambda_proxy_class_dictionary() {
1477 AdjustLambdaProxyClassInfo adjuster;
1478 _dumptime_lambda_proxy_class_dictionary->iterate(&adjuster);
1479 }
1480
1481 void SystemDictionaryShared::serialize_dictionary_headers(SerializeClosure* soc,
1482 bool is_static_archive) {
1483 ArchiveInfo* archive = get_archive(is_static_archive);
1484
1485 archive->_builtin_dictionary.serialize_header(soc);
1486 archive->_unregistered_dictionary.serialize_header(soc);
1487 archive->_lambda_proxy_class_dictionary.serialize_header(soc);
1488 }
1489
1490 void SystemDictionaryShared::serialize_vm_classes(SerializeClosure* soc) {
1491 for (auto id : EnumRange<vmClassID>{}) {
1492 soc->do_ptr(vmClasses::klass_addr_at(id));
1493 }
1494 soc->do_ptr((void**)&_archived_lambda_form_classes);
1495 soc->do_ptr((void**)&_archived_lambda_proxy_classes_boot);
1496 soc->do_ptr((void**)&_archived_lambda_proxy_classes_boot2);
1497 soc->do_ptr((void**)&_archived_lambda_proxy_classes_platform);
1498 soc->do_ptr((void**)&_archived_lambda_proxy_classes_app);
1499 }
1500
1501 const RunTimeClassInfo*
1502 SystemDictionaryShared::find_record(RunTimeSharedDictionary* static_dict, RunTimeSharedDictionary* dynamic_dict, Symbol* name) {
1503 if (!CDSConfig::is_using_archive() || !name->is_shared()) {
1504 // The names of all shared classes must also be a shared Symbol.
1505 return nullptr;
1506 }
1507
1508 unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary_quick(name);
1509 const RunTimeClassInfo* record = nullptr;
1510 if (DynamicArchive::is_mapped()) {
1511 // Use the regenerated holder classes in the dynamic archive as they
1512 // have more methods than those in the base archive.
1513 if (LambdaFormInvokers::may_be_regenerated_class(name)) {
1514 record = dynamic_dict->lookup(name, hash, 0);
1515 if (record != nullptr) {
1516 return record;
1517 }
1518 }
1519 }
1520
1521 if (!MetaspaceShared::is_shared_dynamic(name)) {
1522 // The names of all shared classes in the static dict must also be in the
1523 // static archive
1524 record = static_dict->lookup(name, hash, 0);
1525 }
1526
1527 if (record == nullptr && DynamicArchive::is_mapped()) {
1528 record = dynamic_dict->lookup(name, hash, 0);
1529 }
1530
1531 return record;
1532 }
1533
1534 InstanceKlass* SystemDictionaryShared::find_builtin_class(Symbol* name) {
1535 const RunTimeClassInfo* record = find_record(&_static_archive._builtin_dictionary,
1536 &_dynamic_archive._builtin_dictionary,
1537 name);
1538 if (record != nullptr) {
1539 assert(!record->_klass->is_hidden(), "hidden class cannot be looked up by name");
1540 assert(check_alignment(record->_klass), "Address not aligned");
1541 // We did not save the classfile data of the generated LambdaForm invoker classes,
1542 // so we cannot support CLFH for such classes.
1543 if (record->_klass->is_generated_shared_class() && JvmtiExport::should_post_class_file_load_hook()) {
1544 return nullptr;
1545 }
1546 return record->_klass;
1547 } else {
1548 return nullptr;
1549 }
1550 }
1551
1552 void SystemDictionaryShared::update_shared_entry(InstanceKlass* k, int id) {
1553 assert(CDSConfig::is_dumping_static_archive(), "class ID is used only for static dump (from classlist)");
1554 DumpTimeClassInfo* info = get_info(k);
1555 info->_id = id;
1556 }
1557
1558 const char* SystemDictionaryShared::class_loader_name_for_shared(Klass* k) {
1559 assert(k != nullptr, "Sanity");
1560 assert(k->is_shared(), "Must be");
1561 assert(k->is_instance_klass(), "Must be");
1562 InstanceKlass* ik = InstanceKlass::cast(k);
1563 if (ik->is_shared_boot_class()) {
1564 return "boot_loader";
1565 } else if (ik->is_shared_platform_class()) {
1566 return "platform_loader";
1567 } else if (ik->is_shared_app_class()) {
1568 return "app_loader";
1569 } else if (ik->is_shared_unregistered_class()) {
1570 return "unregistered_loader";
1571 } else {
1572 return "unknown loader";
1573 }
1574 }
1575
1576 class SharedDictionaryPrinter : StackObj {
1577 outputStream* _st;
1578 int _index;
1579 public:
1580 SharedDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
1581
1582 void do_value(const RunTimeClassInfo* record) {
1583 ResourceMark rm;
1584 _st->print_cr("%4d: %s %s", _index++, record->_klass->external_name(),
1585 SystemDictionaryShared::class_loader_name_for_shared(record->_klass));
1586 if (record->_klass->array_klasses() != nullptr) {
1587 record->_klass->array_klasses()->cds_print_value_on(_st);
1588 _st->cr();
1589 }
1590 }
1591 int index() const { return _index; }
1592 };
1593
1594 class SharedLambdaDictionaryPrinter : StackObj {
1595 outputStream* _st;
1596 int _index;
1597 public:
1598 SharedLambdaDictionaryPrinter(outputStream* st, int idx) : _st(st), _index(idx) {}
1599
1600 void do_value(const RunTimeLambdaProxyClassInfo* record) {
1601 if (record->proxy_klass_head()->lambda_proxy_is_available()) {
1602 ResourceMark rm;
1603 Klass* k = record->proxy_klass_head();
1604 while (k != nullptr) {
1605 _st->print_cr("%4d: %s %s", _index++, k->external_name(),
1606 SystemDictionaryShared::class_loader_name_for_shared(k));
1607 k = k->next_link();
1608 }
1609 }
1610 }
1611 };
1612
1613 void SystemDictionaryShared::ArchiveInfo::print_on(const char* prefix,
1614 outputStream* st) {
1615 st->print_cr("%sShared Dictionary", prefix);
1616 SharedDictionaryPrinter p(st);
1617 st->print_cr("%sShared Builtin Dictionary", prefix);
1618 _builtin_dictionary.iterate(&p);
1619 st->print_cr("%sShared Unregistered Dictionary", prefix);
1620 _unregistered_dictionary.iterate(&p);
1621 if (!_lambda_proxy_class_dictionary.empty()) {
1622 st->print_cr("%sShared Lambda Dictionary", prefix);
1623 SharedLambdaDictionaryPrinter ldp(st, p.index());
1624 _lambda_proxy_class_dictionary.iterate(&ldp);
1625 }
1626 }
1627
1628 void SystemDictionaryShared::ArchiveInfo::print_table_statistics(const char* prefix,
1629 outputStream* st) {
1630 st->print_cr("%sArchve Statistics", prefix);
1631 _builtin_dictionary.print_table_statistics(st, "Builtin Shared Dictionary");
1632 _unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
1633 _lambda_proxy_class_dictionary.print_table_statistics(st, "Lambda Shared Dictionary");
1634 }
1635
1636 void SystemDictionaryShared::print_shared_archive(outputStream* st, bool is_static) {
1637 if (CDSConfig::is_using_archive()) {
1638 if (is_static) {
1639 _static_archive.print_on("", st);
1640 } else {
1641 if (DynamicArchive::is_mapped()) {
1642 _dynamic_archive.print_on("Dynamic ", st);
1643 }
1644 }
1645 }
1646 }
1647
1648 void SystemDictionaryShared::print_on(outputStream* st) {
1649 print_shared_archive(st, true);
1650 print_shared_archive(st, false);
1651 }
1652
1653 void SystemDictionaryShared::print_table_statistics(outputStream* st) {
1654 if (CDSConfig::is_using_archive()) {
1655 _static_archive.print_table_statistics("Static ", st);
1656 if (DynamicArchive::is_mapped()) {
1657 _dynamic_archive.print_table_statistics("Dynamic ", st);
1658 }
1659 }
1660 }
1661
1662 bool SystemDictionaryShared::is_dumptime_table_empty() {
1663 assert_lock_strong(DumpTimeTable_lock);
1664 _dumptime_table->update_counts();
1665 if (_dumptime_table->count_of(true) == 0 && _dumptime_table->count_of(false) == 0){
1666 return true;
1667 }
1668 return false;
1669 }
1670
1671 class CleanupDumpTimeLambdaProxyClassTable: StackObj {
1672 public:
1673 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1674 assert_lock_strong(DumpTimeTable_lock);
1675 InstanceKlass* caller_ik = key.caller_ik();
1676 InstanceKlass* nest_host = caller_ik->nest_host_not_null();
1677
1678 // If the caller class and/or nest_host are excluded, the associated lambda proxy
1679 // must also be excluded.
1680 bool always_exclude = SystemDictionaryShared::check_for_exclusion(caller_ik, nullptr) ||
1681 SystemDictionaryShared::check_for_exclusion(nest_host, nullptr);
1682
1683 for (int i = info._proxy_klasses->length() - 1; i >= 0; i--) {
1684 InstanceKlass* ik = info._proxy_klasses->at(i);
1685 if (always_exclude || SystemDictionaryShared::check_for_exclusion(ik, nullptr)) {
1686 SystemDictionaryShared::reset_registered_lambda_proxy_class(ik);
1687 info._proxy_klasses->remove_at(i);
1688 }
1689 }
1690 return info._proxy_klasses->length() == 0 ? true /* delete the node*/ : false;
1691 }
1692 };
1693
1694 void SystemDictionaryShared::cleanup_lambda_proxy_class_dictionary() {
1695 assert_lock_strong(DumpTimeTable_lock);
1696 CleanupDumpTimeLambdaProxyClassTable cleanup_proxy_classes;
1697 _dumptime_lambda_proxy_class_dictionary->unlink(&cleanup_proxy_classes);
1698 }
1699
1700 void SystemDictionaryShared::create_loader_positive_lookup_cache(TRAPS) {
1701 GrowableArray<InstanceKlass*> shared_classes_list;
1702 {
1703 // With static dumping, we have only a single Java thread (see JVM_StartThread) so
1704 // no no other threads should be loading classes. Otherwise, the code below may miss some
1705 // classes that are loaded concurrently.
1706 assert(CDSConfig::is_dumping_static_archive(), "no other threads should be loading classes");
1707
1708 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
1709 _dumptime_table->iterate_all_classes_in_builtin_loaders([&](InstanceKlass* k, DumpTimeClassInfo& info) {
1710 if (!k->is_hidden() && !check_for_exclusion(k, &info)) {
1711 shared_classes_list.append(k);
1712 }
1713 }
1714 );
1715 }
1716
1717 InstanceKlass* ik = vmClasses::Class_klass();
1718 objArrayOop r = oopFactory::new_objArray(ik, shared_classes_list.length(), CHECK);
1719 objArrayHandle array_h(THREAD, r);
1720
1721 for (int i = 0; i < shared_classes_list.length(); i++) {
1722 oop mirror = shared_classes_list.at(i)->java_mirror();
1723 Handle mirror_h(THREAD, mirror);
1724 array_h->obj_at_put(i, mirror_h());
1725 }
1726
1727 TempNewSymbol method = SymbolTable::new_symbol("generatePositiveLookupCache");
1728 TempNewSymbol signature = SymbolTable::new_symbol("([Ljava/lang/Class;)V");
1729
1730 JavaCallArguments args(Handle(THREAD, SystemDictionary::java_system_loader()));
1731 args.push_oop(array_h);
1732 JavaValue result(T_VOID);
1733 JavaCalls::call_virtual(&result,
1734 vmClasses::jdk_internal_loader_ClassLoaders_AppClassLoader_klass(),
1735 method,
1736 signature,
1737 &args,
1738 CHECK);
1739
1740 if (HAS_PENDING_EXCEPTION) {
1741 Handle exc_handle(THREAD, PENDING_EXCEPTION);
1742 CLEAR_PENDING_EXCEPTION;
1743 ResourceMark rm(THREAD);
1744
1745 log_warning(cds)("Exception during AppClassLoader::generatePositiveLookupCache() call");
1746 LogStreamHandle(Debug, cds) log;
1747 if (log.is_enabled()) {
1748 java_lang_Throwable::print_stack_trace(exc_handle, &log);
1749 }
1750 return;
1751 }
1752 }