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