1 /*
2 * Copyright (c) 2014, 2021, 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.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 unsharable 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 DumpTimeClassInfo* SystemDictionaryShared::find_or_allocate_info_for(InstanceKlass* k) {
191 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
192 return find_or_allocate_info_for_locked(k);
193 }
194
195 DumpTimeClassInfo* SystemDictionaryShared::find_or_allocate_info_for_locked(InstanceKlass* k) {
196 assert_lock_strong(DumpTimeTable_lock);
197 if (_dumptime_table == NULL) {
198 _dumptime_table = new (ResourceObj::C_HEAP, mtClass) DumpTimeSharedClassTable;
199 }
200 return _dumptime_table->find_or_allocate_info_for(k, _dump_in_progress);
201 }
202
203 bool SystemDictionaryShared::check_for_exclusion(InstanceKlass* k, DumpTimeClassInfo* info) {
204 if (MetaspaceShared::is_in_shared_metaspace(k)) {
205 // We have reached a super type that's already in the base archive. Treat it
206 // as "not excluded".
207 assert(DynamicDumpSharedSpaces, "must be");
208 return false;
209 }
210
211 if (info == NULL) {
212 info = _dumptime_table->get(k);
213 assert(info != NULL, "supertypes of any classes in _dumptime_table must either be shared, or must also be in _dumptime_table");
214 }
215
216 if (!info->has_checked_exclusion()) {
217 if (check_for_exclusion_impl(k)) {
218 info->set_excluded();
219 }
220 info->set_has_checked_exclusion();
221 }
222
223 return info->is_excluded();
224 }
225
226 // Returns true so the caller can do: return warn_excluded(".....");
227 bool SystemDictionaryShared::warn_excluded(InstanceKlass* k, const char* reason) {
228 ResourceMark rm;
229 log_warning(cds)("Skipping %s: %s", k->name()->as_C_string(), reason);
230 return true;
231 }
232
233 bool SystemDictionaryShared::is_jfr_event_class(InstanceKlass *k) {
234 while (k) {
235 if (k->name()->equals("jdk/internal/event/Event")) {
236 return true;
237 }
238 k = k->java_super();
239 }
240 return false;
241 }
242
243 bool SystemDictionaryShared::is_registered_lambda_proxy_class(InstanceKlass* ik) {
244 DumpTimeClassInfo* info = _dumptime_table->get(ik);
245 return (info != NULL) ? info->_is_archived_lambda_proxy : false;
246 }
247
248 void SystemDictionaryShared::reset_registered_lambda_proxy_class(InstanceKlass* ik) {
249 DumpTimeClassInfo* info = _dumptime_table->get(ik);
250 if (info != NULL) {
251 info->_is_archived_lambda_proxy = false;
252 info->set_excluded();
253 }
254 }
255
256 bool SystemDictionaryShared::is_early_klass(InstanceKlass* ik) {
257 DumpTimeClassInfo* info = _dumptime_table->get(ik);
258 return (info != NULL) ? info->is_early_klass() : false;
259 }
260
261 bool SystemDictionaryShared::is_hidden_lambda_proxy(InstanceKlass* ik) {
262 assert(ik->is_shared(), "applicable to only a shared class");
263 if (ik->is_hidden()) {
264 return true;
265 } else {
266 return false;
267 }
268 }
269
270 bool SystemDictionaryShared::check_for_exclusion_impl(InstanceKlass* k) {
271 if (k->is_in_error_state()) {
272 return warn_excluded(k, "In error state");
273 }
274 if (k->is_scratch_class()) {
275 return warn_excluded(k, "A scratch class");
276 }
277 if (!k->is_loaded()) {
278 return warn_excluded(k, "Not in loaded state");
279 }
280 if (has_been_redefined(k)) {
281 return warn_excluded(k, "Has been redefined");
282 }
283 if (!k->is_hidden() && k->shared_classpath_index() < 0 && is_builtin(k)) {
284 // These are classes loaded from unsupported locations (such as those loaded by JVMTI native
285 // agent during dump time).
286 return warn_excluded(k, "Unsupported location");
287 }
288 if (k->signers() != NULL) {
289 // We cannot include signed classes in the archive because the certificates
290 // used during dump time may be different than those used during
291 // runtime (due to expiration, etc).
292 return warn_excluded(k, "Signed JAR");
293 }
294 if (is_jfr_event_class(k)) {
295 // We cannot include JFR event classes because they need runtime-specific
296 // instrumentation in order to work with -XX:FlightRecorderOptions:retransform=false.
297 // There are only a small number of these classes, so it's not worthwhile to
298 // support them and make CDS more complicated.
299 return warn_excluded(k, "JFR event class");
300 }
301
302 if (!k->is_linked()) {
303 if (has_class_failed_verification(k)) {
304 return warn_excluded(k, "Failed verification");
305 }
306 } else {
307 if (!k->can_be_verified_at_dumptime()) {
308 // We have an old class that has been linked (e.g., it's been executed during
309 // dump time). This class has been verified using the old verifier, which
310 // doesn't save the verification constraints, so check_verification_constraints()
311 // won't work at runtime.
312 // As a result, we cannot store this class. It must be loaded and fully verified
313 // at runtime.
314 return warn_excluded(k, "Old class has been linked");
315 }
316 }
317
318 if (k->is_hidden() && !is_registered_lambda_proxy_class(k)) {
319 ResourceMark rm;
320 log_debug(cds)("Skipping %s: Hidden class", k->name()->as_C_string());
321 return true;
322 }
323
324 InstanceKlass* super = k->java_super();
325 if (super != NULL && check_for_exclusion(super, NULL)) {
326 ResourceMark rm;
327 log_warning(cds)("Skipping %s: super class %s is excluded", k->name()->as_C_string(), super->name()->as_C_string());
328 return true;
329 }
330
331 Array<InstanceKlass*>* interfaces = k->local_interfaces();
332 int len = interfaces->length();
333 for (int i = 0; i < len; i++) {
334 InstanceKlass* intf = interfaces->at(i);
335 if (check_for_exclusion(intf, NULL)) {
336 ResourceMark rm;
337 log_warning(cds)("Skipping %s: interface %s is excluded", k->name()->as_C_string(), intf->name()->as_C_string());
338 return true;
339 }
340 }
341
342 return false; // false == k should NOT be excluded
343 }
344
345 bool SystemDictionaryShared::is_builtin_loader(ClassLoaderData* loader_data) {
346 oop class_loader = loader_data->class_loader();
347 return (class_loader == NULL ||
348 SystemDictionary::is_system_class_loader(class_loader) ||
349 SystemDictionary::is_platform_class_loader(class_loader));
350 }
351
352 bool SystemDictionaryShared::has_platform_or_app_classes() {
353 if (FileMapInfo::current_info()->has_platform_or_app_classes()) {
354 return true;
355 }
356 if (DynamicArchive::is_mapped() &&
357 FileMapInfo::dynamic_info()->has_platform_or_app_classes()) {
358 return true;
359 }
360 return false;
361 }
362
363 // The following stack shows how this code is reached:
364 //
365 // [0] SystemDictionaryShared::find_or_load_shared_class()
366 // [1] JVM_FindLoadedClass
367 // [2] java.lang.ClassLoader.findLoadedClass0()
368 // [3] java.lang.ClassLoader.findLoadedClass()
369 // [4] jdk.internal.loader.BuiltinClassLoader.loadClassOrNull()
370 // [5] jdk.internal.loader.BuiltinClassLoader.loadClass()
371 // [6] jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(), or
372 // jdk.internal.loader.ClassLoaders$PlatformClassLoader.loadClass()
373 //
374 // AppCDS supports fast class loading for these 2 built-in class loaders:
375 // jdk.internal.loader.ClassLoaders$PlatformClassLoader
376 // jdk.internal.loader.ClassLoaders$AppClassLoader
377 // with the following assumptions (based on the JDK core library source code):
378 //
379 // [a] these two loaders use the BuiltinClassLoader.loadClassOrNull() to
380 // load the named class.
381 // [b] BuiltinClassLoader.loadClassOrNull() first calls findLoadedClass(name).
382 // [c] At this point, if we can find the named class inside the
383 // shared_dictionary, we can perform further checks (see
384 // SystemDictionary::is_shared_class_visible) to ensure that this class
385 // was loaded by the same class loader during dump time.
386 //
387 // Given these assumptions, we intercept the findLoadedClass() call to invoke
388 // SystemDictionaryShared::find_or_load_shared_class() to load the shared class from
389 // the archive for the 2 built-in class loaders. This way,
390 // we can improve start-up because we avoid decoding the classfile,
391 // and avoid delegating to the parent loader.
392 //
393 // NOTE: there's a lot of assumption about the Java code. If any of that change, this
394 // needs to be redesigned.
395
396 InstanceKlass* SystemDictionaryShared::find_or_load_shared_class(
397 Symbol* name, Handle class_loader, TRAPS) {
398 InstanceKlass* k = NULL;
399 if (UseSharedSpaces) {
400 if (!has_platform_or_app_classes()) {
401 return NULL;
402 }
403
404 if (SystemDictionary::is_system_class_loader(class_loader()) ||
405 SystemDictionary::is_platform_class_loader(class_loader())) {
406 // Fix for 4474172; see evaluation for more details
407 class_loader = Handle(
408 THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
409 ClassLoaderData *loader_data = register_loader(class_loader);
410 Dictionary* dictionary = loader_data->dictionary();
411 unsigned int d_hash = dictionary->compute_hash(name);
412
413 // Note: currently, find_or_load_shared_class is called only from
414 // JVM_FindLoadedClass and used for PlatformClassLoader and AppClassLoader,
415 // which are parallel-capable loaders, so a lock here is NOT taken.
416 assert(get_loader_lock_or_null(class_loader) == NULL, "ObjectLocker not required");
417 {
418 MutexLocker mu(THREAD, SystemDictionary_lock);
419 InstanceKlass* check = dictionary->find_class(d_hash, name);
420 if (check != NULL) {
421 return check;
422 }
423 }
424
425 k = load_shared_class_for_builtin_loader(name, class_loader, THREAD);
426 if (k != NULL) {
427 SharedClassLoadingMark slm(THREAD, k);
428 k = find_or_define_instance_class(name, class_loader, k, CHECK_NULL);
429 }
430 }
431 }
432 return k;
433 }
434
435 class UnregisteredClassesTable : public ResourceHashtable<
436 Symbol*, InstanceKlass*,
437 15889, // prime number
438 ResourceObj::C_HEAP> {};
439
440 static UnregisteredClassesTable* _unregistered_classes_table = NULL;
441
442 // true == class was successfully added; false == a duplicated class (with the same name) already exists.
443 bool SystemDictionaryShared::add_unregistered_class(Thread* current, InstanceKlass* klass) {
444 // We don't allow duplicated unregistered classes with the same name.
445 // We only archive the first class with that name that succeeds putting
446 // itself into the table.
447 assert(Arguments::is_dumping_archive() || ClassListWriter::is_enabled(), "sanity");
448 MutexLocker ml(current, UnregisteredClassesTable_lock);
449 Symbol* name = klass->name();
450 if (_unregistered_classes_table == NULL) {
451 _unregistered_classes_table = new (ResourceObj::C_HEAP, mtClass)UnregisteredClassesTable();
452 }
453 bool created;
454 InstanceKlass** v = _unregistered_classes_table->put_if_absent(name, klass, &created);
455 if (created) {
456 name->increment_refcount();
457 }
458 return (klass == *v);
459 }
460
461 // This function is called to lookup the super/interfaces of shared classes for
462 // unregistered loaders. E.g., SharedClass in the below example
463 // where "super:" (and optionally "interface:") have been specified.
464 //
465 // java/lang/Object id: 0
466 // Interface id: 2 super: 0 source: cust.jar
467 // SharedClass id: 4 super: 0 interfaces: 2 source: cust.jar
468 InstanceKlass* SystemDictionaryShared::lookup_super_for_unregistered_class(
469 Symbol* class_name, Symbol* super_name, bool is_superclass) {
470
471 assert(DumpSharedSpaces, "only when static dumping");
472
473 if (!ClassListParser::is_parsing_thread()) {
474 // Unregistered classes can be created only by ClassListParser::_parsing_thread.
475
476 return NULL;
477 }
478
479 ClassListParser* parser = ClassListParser::instance();
480 if (parser == NULL) {
481 // We're still loading the well-known classes, before the ClassListParser is created.
482 return NULL;
483 }
484 if (class_name->equals(parser->current_class_name())) {
485 // When this function is called, all the numbered super and interface types
486 // must have already been loaded. Hence this function is never recursively called.
487 if (is_superclass) {
488 return parser->lookup_super_for_current_class(super_name);
489 } else {
490 return parser->lookup_interface_for_current_class(super_name);
491 }
492 } else {
493 // The VM is not trying to resolve a super type of parser->current_class_name().
494 // Instead, it's resolving an error class (because parser->current_class_name() has
495 // failed parsing or verification). Don't do anything here.
496 return NULL;
497 }
498 }
499
500 void SystemDictionaryShared::set_shared_class_misc_info(InstanceKlass* k, ClassFileStream* cfs) {
501 Arguments::assert_is_dumping_archive();
502 assert(!is_builtin(k), "must be unregistered class");
503 DumpTimeClassInfo* info = find_or_allocate_info_for(k);
504 if (info != NULL) {
505 info->_clsfile_size = cfs->length();
506 info->_clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
507 }
508 }
509
510 void SystemDictionaryShared::init_dumptime_info(InstanceKlass* k) {
511 (void)find_or_allocate_info_for(k);
512 }
513
514 void SystemDictionaryShared::remove_dumptime_info(InstanceKlass* k) {
515 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
516 DumpTimeClassInfo* p = _dumptime_table->get(k);
517 if (p == NULL) {
518 return;
519 }
520 if (p->_verifier_constraints != NULL) {
521 for (int i = 0; i < p->_verifier_constraints->length(); i++) {
522 DumpTimeClassInfo::DTVerifierConstraint constraint = p->_verifier_constraints->at(i);
523 if (constraint._name != NULL ) {
524 constraint._name->decrement_refcount();
525 }
526 if (constraint._from_name != NULL ) {
527 constraint._from_name->decrement_refcount();
528 }
529 }
530 FREE_C_HEAP_ARRAY(DumpTimeClassInfo::DTVerifierConstraint, p->_verifier_constraints);
531 p->_verifier_constraints = NULL;
532 FREE_C_HEAP_ARRAY(char, p->_verifier_constraint_flags);
533 p->_verifier_constraint_flags = NULL;
534 }
535 if (p->_loader_constraints != NULL) {
536 for (int i = 0; i < p->_loader_constraints->length(); i++) {
537 DumpTimeClassInfo::DTLoaderConstraint ld = p->_loader_constraints->at(i);
538 if (ld._name != NULL) {
539 ld._name->decrement_refcount();
540 }
541 }
542 FREE_C_HEAP_ARRAY(DumpTimeClassInfo::DTLoaderConstraint, p->_loader_constraints);
543 p->_loader_constraints = NULL;
544 }
545 _dumptime_table->remove(k);
546 }
547
548 void SystemDictionaryShared::handle_class_unloading(InstanceKlass* klass) {
549 if (Arguments::is_dumping_archive()) {
550 remove_dumptime_info(klass);
551 }
552
553 if (_unregistered_classes_table != NULL) {
554 // Remove the class from _unregistered_classes_table: keep the entry but
555 // set it to NULL. This ensure no classes with the same name can be
556 // added again.
557 MutexLocker ml(Thread::current(), UnregisteredClassesTable_lock);
558 InstanceKlass** v = _unregistered_classes_table->get(klass->name());
559 if (v != NULL) {
560 *v = NULL;
561 }
562 }
563
564 if (ClassListWriter::is_enabled()) {
565 ClassListWriter cw;
566 cw.handle_class_unloading((const InstanceKlass*)klass);
567 }
568 }
569
570 // Check if a class or any of its supertypes has been redefined.
571 bool SystemDictionaryShared::has_been_redefined(InstanceKlass* k) {
572 if (k->has_been_redefined()) {
573 return true;
574 }
575 if (k->java_super() != NULL && has_been_redefined(k->java_super())) {
576 return true;
577 }
578 Array<InstanceKlass*>* interfaces = k->local_interfaces();
579 int len = interfaces->length();
580 for (int i = 0; i < len; i++) {
581 if (has_been_redefined(interfaces->at(i))) {
582 return true;
583 }
584 }
585 return false;
586 }
587
588 // k is a class before relocating by ArchiveBuilder
589 void SystemDictionaryShared::validate_before_archiving(InstanceKlass* k) {
590 ResourceMark rm;
591 const char* name = k->name()->as_C_string();
592 DumpTimeClassInfo* info = _dumptime_table->get(k);
593 assert(_no_class_loading_should_happen, "class loading must be disabled");
594 guarantee(info != NULL, "Class %s must be entered into _dumptime_table", name);
595 guarantee(!info->is_excluded(), "Should not attempt to archive excluded class %s", name);
596 if (is_builtin(k)) {
597 if (k->is_hidden()) {
598 assert(is_registered_lambda_proxy_class(k), "unexpected hidden class %s", name);
599 }
600 guarantee(!k->is_shared_unregistered_class(),
601 "Class loader type must be set for BUILTIN class %s", name);
602
603 } else {
604 guarantee(k->is_shared_unregistered_class(),
605 "Class loader type must not be set for UNREGISTERED class %s", name);
606 }
607 }
608
609 class UnregisteredClassesDuplicationChecker : StackObj {
610 GrowableArray<InstanceKlass*> _list;
611 Thread* _thread;
612 public:
613 UnregisteredClassesDuplicationChecker() : _thread(Thread::current()) {}
614
615 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
616 if (!SystemDictionaryShared::is_builtin(k)) {
617 _list.append(k);
618 }
619 return true; // keep on iterating
620 }
621
622 static int compare_by_loader(InstanceKlass** a, InstanceKlass** b) {
623 ClassLoaderData* loader_a = a[0]->class_loader_data();
624 ClassLoaderData* loader_b = b[0]->class_loader_data();
625
626 if (loader_a != loader_b) {
627 return intx(loader_a) - intx(loader_b);
628 } else {
629 return intx(a[0]) - intx(b[0]);
630 }
631 }
632
633 void mark_duplicated_classes() {
634 // Two loaders may load two identical or similar hierarchies of classes. If we
635 // check for duplication in random order, we may end up excluding important base classes
636 // in both hierarchies, causing most of the classes to be excluded.
637 // We sort the classes by their loaders. This way we're likely to archive
638 // all classes in the one of the two hierarchies.
639 _list.sort(compare_by_loader);
640 for (int i = 0; i < _list.length(); i++) {
641 InstanceKlass* k = _list.at(i);
642 bool i_am_first = SystemDictionaryShared::add_unregistered_class(_thread, k);
643 if (!i_am_first) {
644 SystemDictionaryShared::warn_excluded(k, "Duplicated unregistered class");
645 SystemDictionaryShared::set_excluded_locked(k);
646 }
647 }
648 }
649 };
650
651 class ExcludeDumpTimeSharedClasses : StackObj {
652 public:
653 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
654 SystemDictionaryShared::check_for_exclusion(k, &info);
655 return true; // keep on iterating
656 }
657 };
658
659 void SystemDictionaryShared::check_excluded_classes() {
660 assert(no_class_loading_should_happen(), "sanity");
661 assert_lock_strong(DumpTimeTable_lock);
662
663 if (DynamicDumpSharedSpaces) {
664 // Do this first -- if a base class is excluded due to duplication,
665 // all of its subclasses will also be excluded by ExcludeDumpTimeSharedClasses
666 ResourceMark rm;
667 UnregisteredClassesDuplicationChecker dup_checker;
668 _dumptime_table->iterate(&dup_checker);
669 dup_checker.mark_duplicated_classes();
670 }
671
672 ExcludeDumpTimeSharedClasses excl;
673 _dumptime_table->iterate(&excl);
674 _dumptime_table->update_counts();
675
676 cleanup_lambda_proxy_class_dictionary();
677 }
678
679 bool SystemDictionaryShared::is_excluded_class(InstanceKlass* k) {
680 assert(_no_class_loading_should_happen, "sanity");
681 assert_lock_strong(DumpTimeTable_lock);
682 Arguments::assert_is_dumping_archive();
683 DumpTimeClassInfo* p = find_or_allocate_info_for_locked(k);
684 return (p == NULL) ? true : p->is_excluded();
685 }
686
687 void SystemDictionaryShared::set_excluded_locked(InstanceKlass* k) {
688 assert_lock_strong(DumpTimeTable_lock);
689 Arguments::assert_is_dumping_archive();
690 DumpTimeClassInfo* info = find_or_allocate_info_for_locked(k);
691 if (info != NULL) {
692 info->set_excluded();
693 }
694 }
695
696 void SystemDictionaryShared::set_excluded(InstanceKlass* k) {
697 Arguments::assert_is_dumping_archive();
698 DumpTimeClassInfo* info = find_or_allocate_info_for(k);
699 if (info != NULL) {
700 info->set_excluded();
701 }
702 }
703
704 void SystemDictionaryShared::set_class_has_failed_verification(InstanceKlass* ik) {
705 Arguments::assert_is_dumping_archive();
706 DumpTimeClassInfo* p = find_or_allocate_info_for(ik);
707 if (p != NULL) {
708 p->set_failed_verification();
709 }
710 }
711
712 bool SystemDictionaryShared::has_class_failed_verification(InstanceKlass* ik) {
713 Arguments::assert_is_dumping_archive();
714 if (_dumptime_table == NULL) {
715 assert(DynamicDumpSharedSpaces, "sanity");
716 assert(ik->is_shared(), "must be a shared class in the static archive");
717 return false;
718 }
719 DumpTimeClassInfo* p = _dumptime_table->get(ik);
720 return (p == NULL) ? false : p->failed_verification();
721 }
722
723 class IterateDumpTimeSharedClassTable : StackObj {
724 MetaspaceClosure *_it;
725 public:
726 IterateDumpTimeSharedClassTable(MetaspaceClosure* it) : _it(it) {}
727
728 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
729 assert_lock_strong(DumpTimeTable_lock);
730 if (k->is_loader_alive() && !info.is_excluded()) {
731 info.metaspace_pointers_do(_it);
732 }
733 return true; // keep on iterating
734 }
735 };
736
737 class IterateDumpTimeLambdaProxyClassDictionary : StackObj {
738 MetaspaceClosure *_it;
739 public:
740 IterateDumpTimeLambdaProxyClassDictionary(MetaspaceClosure* it) : _it(it) {}
741
742 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
743 assert_lock_strong(DumpTimeTable_lock);
744 if (key.caller_ik()->is_loader_alive()) {
745 info.metaspace_pointers_do(_it);
746 key.metaspace_pointers_do(_it);
747 }
748 return true; // keep on iterating
749 }
750 };
751
752 void SystemDictionaryShared::dumptime_classes_do(class MetaspaceClosure* it) {
753 assert_lock_strong(DumpTimeTable_lock);
754 IterateDumpTimeSharedClassTable iter(it);
755 _dumptime_table->iterate(&iter);
756 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
757 IterateDumpTimeLambdaProxyClassDictionary iter_lambda(it);
758 _dumptime_lambda_proxy_class_dictionary->iterate(&iter_lambda);
759 }
760 }
761
762 bool SystemDictionaryShared::add_verification_constraint(InstanceKlass* k, Symbol* name,
763 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
764 Arguments::assert_is_dumping_archive();
765 DumpTimeClassInfo* info = find_or_allocate_info_for(k);
766 if (info != NULL) {
767 info->add_verification_constraint(k, name, from_name, from_field_is_protected,
768 from_is_array, from_is_object);
769 } else {
770 return true;
771 }
772 if (DynamicDumpSharedSpaces) {
773 // For dynamic dumping, we can resolve all the constraint classes for all class loaders during
774 // the initial run prior to creating the archive before vm exit. We will also perform verification
775 // check when running with the archive.
776 return false;
777 } else {
778 if (is_builtin(k)) {
779 // For builtin class loaders, we can try to complete the verification check at dump time,
780 // because we can resolve all the constraint classes. We will also perform verification check
781 // when running with the archive.
782 return false;
783 } else {
784 // For non-builtin class loaders, we cannot complete the verification check at dump time,
785 // because at dump time we don't know how to resolve classes for such loaders.
786 return true;
787 }
788 }
789 }
790
791 void SystemDictionaryShared::add_to_dump_time_lambda_proxy_class_dictionary(LambdaProxyClassKey& key,
792 InstanceKlass* proxy_klass) {
793 assert_lock_strong(DumpTimeTable_lock);
794 if (_dumptime_lambda_proxy_class_dictionary == NULL) {
795 _dumptime_lambda_proxy_class_dictionary =
796 new (ResourceObj::C_HEAP, mtClass) DumpTimeLambdaProxyClassDictionary;
797 }
798 DumpTimeLambdaProxyClassInfo* lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
799 if (lambda_info == NULL) {
800 DumpTimeLambdaProxyClassInfo info;
801 info.add_proxy_klass(proxy_klass);
802 _dumptime_lambda_proxy_class_dictionary->put(key, info);
803 //lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
804 //assert(lambda_info->_proxy_klass == proxy_klass, "must be"); // debug only -- remove
805 ++_dumptime_lambda_proxy_class_dictionary->_count;
806 } else {
807 lambda_info->add_proxy_klass(proxy_klass);
808 }
809 }
810
811 void SystemDictionaryShared::add_lambda_proxy_class(InstanceKlass* caller_ik,
812 InstanceKlass* lambda_ik,
813 Symbol* invoked_name,
814 Symbol* invoked_type,
815 Symbol* method_type,
816 Method* member_method,
817 Symbol* instantiated_method_type,
818 TRAPS) {
819
820 assert(caller_ik->class_loader() == lambda_ik->class_loader(), "mismatched class loader");
821 assert(caller_ik->class_loader_data() == lambda_ik->class_loader_data(), "mismatched class loader data");
822 assert(java_lang_Class::class_data(lambda_ik->java_mirror()) == NULL, "must not have class data");
823
824 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
825
826 lambda_ik->assign_class_loader_type();
827 lambda_ik->set_shared_classpath_index(caller_ik->shared_classpath_index());
828 InstanceKlass* nest_host = caller_ik->nest_host(CHECK);
829 assert(nest_host != NULL, "unexpected NULL nest_host");
830
831 DumpTimeClassInfo* info = _dumptime_table->get(lambda_ik);
832 if (info != NULL && !lambda_ik->is_non_strong_hidden() && is_builtin(lambda_ik) && is_builtin(caller_ik)
833 // Don't include the lambda proxy if its nest host is not in the "linked" state.
834 && nest_host->is_linked()) {
835 // Set _is_archived_lambda_proxy in DumpTimeClassInfo so that the lambda_ik
836 // won't be excluded during dumping of shared archive. See ExcludeDumpTimeSharedClasses.
837 info->_is_archived_lambda_proxy = true;
838 info->set_nest_host(nest_host);
839
840 LambdaProxyClassKey key(caller_ik,
841 invoked_name,
842 invoked_type,
843 method_type,
844 member_method,
845 instantiated_method_type);
846 add_to_dump_time_lambda_proxy_class_dictionary(key, lambda_ik);
847 }
848 }
849
850 InstanceKlass* SystemDictionaryShared::get_shared_lambda_proxy_class(InstanceKlass* caller_ik,
851 Symbol* invoked_name,
852 Symbol* invoked_type,
853 Symbol* method_type,
854 Method* member_method,
855 Symbol* instantiated_method_type) {
856 MutexLocker ml(CDSLambda_lock, Mutex::_no_safepoint_check_flag);
857 LambdaProxyClassKey key(caller_ik, invoked_name, invoked_type,
858 method_type, member_method, instantiated_method_type);
859 const RunTimeLambdaProxyClassInfo* info = _lambda_proxy_class_dictionary.lookup(&key, key.hash(), 0);
860 if (info == NULL) {
861 // Try lookup from the dynamic lambda proxy class dictionary.
862 info = _dynamic_lambda_proxy_class_dictionary.lookup(&key, key.hash(), 0);
863 }
864 InstanceKlass* proxy_klass = NULL;
865 if (info != NULL) {
866 InstanceKlass* curr_klass = info->proxy_klass_head();
867 InstanceKlass* prev_klass = curr_klass;
868 if (curr_klass->lambda_proxy_is_available()) {
869 while (curr_klass->next_link() != NULL) {
870 prev_klass = curr_klass;
871 curr_klass = InstanceKlass::cast(curr_klass->next_link());
872 }
873 assert(curr_klass->is_hidden(), "must be");
874 assert(curr_klass->lambda_proxy_is_available(), "must be");
875
876 prev_klass->set_next_link(NULL);
877 proxy_klass = curr_klass;
878 proxy_klass->clear_lambda_proxy_is_available();
879 if (log_is_enabled(Debug, cds)) {
880 ResourceMark rm;
881 log_debug(cds)("Loaded lambda proxy: %s ", proxy_klass->external_name());
882 }
883 } else {
884 if (log_is_enabled(Debug, cds)) {
885 ResourceMark rm;
886 log_debug(cds)("Used all archived lambda proxy classes for: %s %s%s",
887 caller_ik->external_name(), invoked_name->as_C_string(), invoked_type->as_C_string());
888 }
889 }
890 }
891 return proxy_klass;
892 }
893
894 InstanceKlass* SystemDictionaryShared::get_shared_nest_host(InstanceKlass* lambda_ik) {
895 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
896 RunTimeClassInfo* record = RunTimeClassInfo::get_for(lambda_ik);
897 return record->nest_host();
898 }
899
900 InstanceKlass* SystemDictionaryShared::prepare_shared_lambda_proxy_class(InstanceKlass* lambda_ik,
901 InstanceKlass* caller_ik, TRAPS) {
902 Handle class_loader(THREAD, caller_ik->class_loader());
903 Handle protection_domain;
904 PackageEntry* pkg_entry = caller_ik->package();
905 if (caller_ik->class_loader() != NULL) {
906 protection_domain = CDSProtectionDomain::init_security_info(class_loader, caller_ik, pkg_entry, CHECK_NULL);
907 }
908
909 InstanceKlass* shared_nest_host = get_shared_nest_host(lambda_ik);
910 assert(shared_nest_host != NULL, "unexpected NULL _nest_host");
911
912 InstanceKlass* loaded_lambda =
913 SystemDictionary::load_shared_lambda_proxy_class(lambda_ik, class_loader, protection_domain, pkg_entry, CHECK_NULL);
914
915 if (loaded_lambda == NULL) {
916 return NULL;
917 }
918
919 // Ensures the nest host is the same as the lambda proxy's
920 // nest host recorded at dump time.
921 InstanceKlass* nest_host = caller_ik->nest_host(THREAD);
922 assert(nest_host == shared_nest_host, "mismatched nest host");
923
924 EventClassLoad class_load_start_event;
925 {
926 MutexLocker mu_r(THREAD, Compile_lock);
927
928 // Add to class hierarchy, and do possible deoptimizations.
929 SystemDictionary::add_to_hierarchy(loaded_lambda);
930 // But, do not add to dictionary.
931 }
932 loaded_lambda->link_class(CHECK_NULL);
933 // notify jvmti
934 if (JvmtiExport::should_post_class_load()) {
935 JvmtiExport::post_class_load(THREAD, loaded_lambda);
936 }
937 if (class_load_start_event.should_commit()) {
938 SystemDictionary::post_class_load_event(&class_load_start_event, loaded_lambda, ClassLoaderData::class_loader_data(class_loader()));
939 }
940
941 loaded_lambda->initialize(CHECK_NULL);
942
943 return loaded_lambda;
944 }
945
946 void SystemDictionaryShared::check_verification_constraints(InstanceKlass* klass,
947 TRAPS) {
948 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
949 RunTimeClassInfo* record = RunTimeClassInfo::get_for(klass);
950
951 int length = record->_num_verifier_constraints;
952 if (length > 0) {
953 for (int i = 0; i < length; i++) {
954 RunTimeClassInfo::RTVerifierConstraint* vc = record->verifier_constraint_at(i);
955 Symbol* name = vc->name();
956 Symbol* from_name = vc->from_name();
957 char c = record->verifier_constraint_flag(i);
958
959 if (log_is_enabled(Trace, cds, verification)) {
960 ResourceMark rm(THREAD);
961 log_trace(cds, verification)("check_verification_constraint: %s: %s must be subclass of %s [0x%x]",
962 klass->external_name(), from_name->as_klass_external_name(),
963 name->as_klass_external_name(), c);
964 }
965
966 bool from_field_is_protected = (c & SystemDictionaryShared::FROM_FIELD_IS_PROTECTED) ? true : false;
967 bool from_is_array = (c & SystemDictionaryShared::FROM_IS_ARRAY) ? true : false;
968 bool from_is_object = (c & SystemDictionaryShared::FROM_IS_OBJECT) ? true : false;
969
970 bool ok = VerificationType::resolve_and_check_assignability(klass, name,
971 from_name, from_field_is_protected, from_is_array, from_is_object, CHECK);
972 if (!ok) {
973 ResourceMark rm(THREAD);
974 stringStream ss;
975
976 ss.print_cr("Bad type on operand stack");
977 ss.print_cr("Exception Details:");
978 ss.print_cr(" Location:\n %s", klass->name()->as_C_string());
979 ss.print_cr(" Reason:\n Type '%s' is not assignable to '%s'",
980 from_name->as_quoted_ascii(), name->as_quoted_ascii());
981 THROW_MSG(vmSymbols::java_lang_VerifyError(), ss.as_string());
982 }
983 }
984 }
985 }
986
987 static oop get_class_loader_by(char type) {
988 if (type == (char)ClassLoader::BOOT_LOADER) {
989 return (oop)NULL;
990 } else if (type == (char)ClassLoader::PLATFORM_LOADER) {
991 return SystemDictionary::java_platform_loader();
992 } else {
993 assert (type == (char)ClassLoader::APP_LOADER, "Sanity");
994 return SystemDictionary::java_system_loader();
995 }
996 }
997
998 // Record class loader constraints that are checked inside
999 // InstanceKlass::link_class(), so that these can be checked quickly
1000 // at runtime without laying out the vtable/itables.
1001 void SystemDictionaryShared::record_linking_constraint(Symbol* name, InstanceKlass* klass,
1002 Handle loader1, Handle loader2) {
1003 // A linking constraint check is executed when:
1004 // - klass extends or implements type S
1005 // - klass overrides method S.M(...) with X.M
1006 // - If klass defines the method M, X is
1007 // the same as klass.
1008 // - If klass does not define the method M,
1009 // X must be a supertype of klass and X.M is
1010 // a default method defined by X.
1011 // - loader1 = X->class_loader()
1012 // - loader2 = S->class_loader()
1013 // - loader1 != loader2
1014 // - M's paramater(s) include an object type T
1015 // We require that
1016 // - whenever loader1 and loader2 try to
1017 // resolve the type T, they must always resolve to
1018 // the same InstanceKlass.
1019 // NOTE: type T may or may not be currently resolved in
1020 // either of these two loaders. The check itself does not
1021 // try to resolve T.
1022 oop klass_loader = klass->class_loader();
1023
1024 if (!is_system_class_loader(klass_loader) &&
1025 !is_platform_class_loader(klass_loader)) {
1026 // If klass is loaded by system/platform loaders, we can
1027 // guarantee that klass and S must be loaded by the same
1028 // respective loader between dump time and run time, and
1029 // the exact same check on (name, loader1, loader2) will
1030 // be executed. Hence, we can cache this check and execute
1031 // it at runtime without walking the vtable/itables.
1032 //
1033 // This cannot be guaranteed for classes loaded by other
1034 // loaders, so we bail.
1035 return;
1036 }
1037
1038 if (DumpSharedSpaces && !is_builtin(klass)) {
1039 // During static dump, unregistered classes (those intended for
1040 // custom loaders) are loaded by the boot loader. Need to
1041 // exclude these for the same reason as above.
1042 // This should be fixed by JDK-8261941.
1043 return;
1044 }
1045
1046 assert(klass_loader != NULL, "should not be called for boot loader");
1047 assert(loader1 != loader2, "must be");
1048
1049 if (DynamicDumpSharedSpaces && Thread::current()->is_VM_thread()) {
1050 // We are re-laying out the vtable/itables of the *copy* of
1051 // a class during the final stage of dynamic dumping. The
1052 // linking constraints for this class has already been recorded.
1053 return;
1054 }
1055 assert(!Thread::current()->is_VM_thread(), "must be");
1056
1057 Arguments::assert_is_dumping_archive();
1058 DumpTimeClassInfo* info = find_or_allocate_info_for(klass);
1059 if (info != NULL) {
1060 info->record_linking_constraint(name, loader1, loader2);
1061 }
1062 }
1063
1064 // returns true IFF there's no need to re-initialize the i/v-tables for klass for
1065 // the purpose of checking class loader constraints.
1066 bool SystemDictionaryShared::check_linking_constraints(Thread* current, InstanceKlass* klass) {
1067 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1068 LogTarget(Info, class, loader, constraints) log;
1069 if (klass->is_shared_boot_class()) {
1070 // No class loader constraint check performed for boot classes.
1071 return true;
1072 }
1073 if (klass->is_shared_platform_class() || klass->is_shared_app_class()) {
1074 RunTimeClassInfo* info = RunTimeClassInfo::get_for(klass);
1075 assert(info != NULL, "Sanity");
1076 if (info->_num_loader_constraints > 0) {
1077 HandleMark hm(current);
1078 for (int i = 0; i < info->_num_loader_constraints; i++) {
1079 RunTimeClassInfo::RTLoaderConstraint* lc = info->loader_constraint_at(i);
1080 Symbol* name = lc->constraint_name();
1081 Handle loader1(current, get_class_loader_by(lc->_loader_type1));
1082 Handle loader2(current, get_class_loader_by(lc->_loader_type2));
1083 if (log.is_enabled()) {
1084 ResourceMark rm(current);
1085 log.print("[CDS add loader constraint for class %s symbol %s loader[0] %s loader[1] %s",
1086 klass->external_name(), name->as_C_string(),
1087 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1088 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
1089 }
1090 if (!SystemDictionary::add_loader_constraint(name, klass, loader1, loader2)) {
1091 // Loader constraint violation has been found. The caller
1092 // will re-layout the vtable/itables to produce the correct
1093 // exception.
1094 if (log.is_enabled()) {
1095 log.print(" failed]");
1096 }
1097 return false;
1098 }
1099 if (log.is_enabled()) {
1100 log.print(" succeeded]");
1101 }
1102 }
1103 return true; // for all recorded constraints added successully.
1104 }
1105 }
1106 if (log.is_enabled()) {
1107 ResourceMark rm(current);
1108 log.print("[CDS has not recorded loader constraint for class %s]", klass->external_name());
1109 }
1110 return false;
1111 }
1112
1113 bool SystemDictionaryShared::is_supported_invokedynamic(BootstrapInfo* bsi) {
1114 LogTarget(Debug, cds, lambda) log;
1115 if (bsi->arg_values() == NULL || !bsi->arg_values()->is_objArray()) {
1116 if (log.is_enabled()) {
1117 LogStream log_stream(log);
1118 log.print("bsi check failed");
1119 log.print(" bsi->arg_values().not_null() %d", bsi->arg_values().not_null());
1120 if (bsi->arg_values().not_null()) {
1121 log.print(" bsi->arg_values()->is_objArray() %d", bsi->arg_values()->is_objArray());
1122 bsi->print_msg_on(&log_stream);
1123 }
1124 }
1125 return false;
1126 }
1127
1128 Handle bsm = bsi->bsm();
1129 if (bsm.is_null() || !java_lang_invoke_DirectMethodHandle::is_instance(bsm())) {
1130 if (log.is_enabled()) {
1131 log.print("bsm check failed");
1132 log.print(" bsm.is_null() %d", bsm.is_null());
1133 log.print(" java_lang_invoke_DirectMethodHandle::is_instance(bsm()) %d",
1134 java_lang_invoke_DirectMethodHandle::is_instance(bsm()));
1135 }
1136 return false;
1137 }
1138
1139 oop mn = java_lang_invoke_DirectMethodHandle::member(bsm());
1140 Method* method = java_lang_invoke_MemberName::vmtarget(mn);
1141 if (method->klass_name()->equals("java/lang/invoke/LambdaMetafactory") &&
1142 method->name()->equals("metafactory") &&
1143 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;")) {
1144 return true;
1145 } else {
1146 if (log.is_enabled()) {
1147 ResourceMark rm;
1148 log.print("method check failed");
1149 log.print(" klass_name() %s", method->klass_name()->as_C_string());
1150 log.print(" name() %s", method->name()->as_C_string());
1151 log.print(" signature() %s", method->signature()->as_C_string());
1152 }
1153 }
1154
1155 return false;
1156 }
1157
1158 class EstimateSizeForArchive : StackObj {
1159 size_t _shared_class_info_size;
1160 int _num_builtin_klasses;
1161 int _num_unregistered_klasses;
1162
1163 public:
1164 EstimateSizeForArchive() {
1165 _shared_class_info_size = 0;
1166 _num_builtin_klasses = 0;
1167 _num_unregistered_klasses = 0;
1168 }
1169
1170 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
1171 if (!info.is_excluded()) {
1172 size_t byte_size = RunTimeClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
1173 _shared_class_info_size += align_up(byte_size, SharedSpaceObjectAlignment);
1174 }
1175 return true; // keep on iterating
1176 }
1177
1178 size_t total() {
1179 return _shared_class_info_size;
1180 }
1181 };
1182
1183 size_t SystemDictionaryShared::estimate_size_for_archive() {
1184 EstimateSizeForArchive est;
1185 _dumptime_table->iterate(&est);
1186 size_t total_size = est.total() +
1187 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(true)) +
1188 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(false));
1189 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
1190 size_t bytesize = align_up(sizeof(RunTimeLambdaProxyClassInfo), SharedSpaceObjectAlignment);
1191 total_size +=
1192 (bytesize * _dumptime_lambda_proxy_class_dictionary->_count) +
1193 CompactHashtableWriter::estimate_size(_dumptime_lambda_proxy_class_dictionary->_count);
1194 } else {
1195 total_size += CompactHashtableWriter::estimate_size(0);
1196 }
1197 return total_size;
1198 }
1199
1200 unsigned int SystemDictionaryShared::hash_for_shared_dictionary(address ptr) {
1201 if (ArchiveBuilder::is_active()) {
1202 uintx offset = ArchiveBuilder::current()->any_to_offset(ptr);
1203 unsigned int hash = primitive_hash<uintx>(offset);
1204 DEBUG_ONLY({
1205 if (MetaspaceObj::is_shared((const MetaspaceObj*)ptr)) {
1206 assert(hash == SystemDictionaryShared::hash_for_shared_dictionary_quick(ptr), "must be");
1207 }
1208 });
1209 return hash;
1210 } else {
1211 return SystemDictionaryShared::hash_for_shared_dictionary_quick(ptr);
1212 }
1213 }
1214
1215 class CopyLambdaProxyClassInfoToArchive : StackObj {
1216 CompactHashtableWriter* _writer;
1217 ArchiveBuilder* _builder;
1218 public:
1219 CopyLambdaProxyClassInfoToArchive(CompactHashtableWriter* writer)
1220 : _writer(writer), _builder(ArchiveBuilder::current()) {}
1221 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1222 // In static dump, info._proxy_klasses->at(0) is already relocated to point to the archived class
1223 // (not the original class).
1224 //
1225 // The following check has been moved to SystemDictionaryShared::check_excluded_classes(), which
1226 // happens before the classes are copied.
1227 //
1228 // if (SystemDictionaryShared::is_excluded_class(info._proxy_klasses->at(0))) {
1229 // return true;
1230 //}
1231 ResourceMark rm;
1232 log_info(cds,dynamic)("Archiving hidden %s", info._proxy_klasses->at(0)->external_name());
1233 size_t byte_size = sizeof(RunTimeLambdaProxyClassInfo);
1234 RunTimeLambdaProxyClassInfo* runtime_info =
1235 (RunTimeLambdaProxyClassInfo*)ArchiveBuilder::ro_region_alloc(byte_size);
1236 runtime_info->init(key, info);
1237 unsigned int hash = runtime_info->hash();
1238 u4 delta = _builder->any_to_offset_u4((void*)runtime_info);
1239 _writer->add(hash, delta);
1240 return true;
1241 }
1242 };
1243
1244 class AdjustLambdaProxyClassInfo : StackObj {
1245 public:
1246 AdjustLambdaProxyClassInfo() {}
1247 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1248 int len = info._proxy_klasses->length();
1249 if (len > 1) {
1250 for (int i = 0; i < len-1; i++) {
1251 InstanceKlass* ok0 = info._proxy_klasses->at(i+0); // this is original klass
1252 InstanceKlass* ok1 = info._proxy_klasses->at(i+1); // this is original klass
1253 assert(ArchiveBuilder::current()->is_in_buffer_space(ok0), "must be");
1254 assert(ArchiveBuilder::current()->is_in_buffer_space(ok1), "must be");
1255 InstanceKlass* bk0 = ok0;
1256 InstanceKlass* bk1 = ok1;
1257 assert(bk0->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
1258 assert(bk1->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
1259 bk0->set_next_link(bk1);
1260 bk1->set_lambda_proxy_is_available();
1261 ArchivePtrMarker::mark_pointer(bk0->next_link_addr());
1262 }
1263 }
1264 info._proxy_klasses->at(0)->set_lambda_proxy_is_available();
1265
1266 return true;
1267 }
1268 };
1269
1270 class CopySharedClassInfoToArchive : StackObj {
1271 CompactHashtableWriter* _writer;
1272 bool _is_builtin;
1273 ArchiveBuilder *_builder;
1274 public:
1275 CopySharedClassInfoToArchive(CompactHashtableWriter* writer,
1276 bool is_builtin)
1277 : _writer(writer), _is_builtin(is_builtin), _builder(ArchiveBuilder::current()) {}
1278
1279 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
1280 if (!info.is_excluded() && info.is_builtin() == _is_builtin) {
1281 size_t byte_size = RunTimeClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
1282 RunTimeClassInfo* record;
1283 record = (RunTimeClassInfo*)ArchiveBuilder::ro_region_alloc(byte_size);
1284 record->init(info);
1285
1286 unsigned int hash;
1287 Symbol* name = info._klass->name();
1288 hash = SystemDictionaryShared::hash_for_shared_dictionary((address)name);
1289 u4 delta = _builder->buffer_to_offset_u4((address)record);
1290 if (_is_builtin && info._klass->is_hidden()) {
1291 // skip
1292 } else {
1293 _writer->add(hash, delta);
1294 }
1295 if (log_is_enabled(Trace, cds, hashtables)) {
1296 ResourceMark rm;
1297 log_trace(cds,hashtables)("%s dictionary: %s", (_is_builtin ? "builtin" : "unregistered"), info._klass->external_name());
1298 }
1299
1300 // Save this for quick runtime lookup of InstanceKlass* -> RunTimeClassInfo*
1301 RunTimeClassInfo::set_for(info._klass, record);
1302 }
1303 return true; // keep on iterating
1304 }
1305 };
1306
1307 void SystemDictionaryShared::write_lambda_proxy_class_dictionary(LambdaProxyClassDictionary *dictionary) {
1308 CompactHashtableStats stats;
1309 dictionary->reset();
1310 CompactHashtableWriter writer(_dumptime_lambda_proxy_class_dictionary->_count, &stats);
1311 CopyLambdaProxyClassInfoToArchive copy(&writer);
1312 _dumptime_lambda_proxy_class_dictionary->iterate(©);
1313 writer.dump(dictionary, "lambda proxy class dictionary");
1314 }
1315
1316 void SystemDictionaryShared::write_dictionary(RunTimeSharedDictionary* dictionary,
1317 bool is_builtin) {
1318 CompactHashtableStats stats;
1319 dictionary->reset();
1320 CompactHashtableWriter writer(_dumptime_table->count_of(is_builtin), &stats);
1321 CopySharedClassInfoToArchive copy(&writer, is_builtin);
1322 assert_lock_strong(DumpTimeTable_lock);
1323 _dumptime_table->iterate(©);
1324 writer.dump(dictionary, is_builtin ? "builtin dictionary" : "unregistered dictionary");
1325 }
1326
1327 void SystemDictionaryShared::write_to_archive(bool is_static_archive) {
1328 if (is_static_archive) {
1329 write_dictionary(&_builtin_dictionary, true);
1330 write_dictionary(&_unregistered_dictionary, false);
1331 } else {
1332 write_dictionary(&_dynamic_builtin_dictionary, true);
1333 write_dictionary(&_dynamic_unregistered_dictionary, false);
1334 }
1335 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
1336 write_lambda_proxy_class_dictionary(&_lambda_proxy_class_dictionary);
1337 }
1338 }
1339
1340 void SystemDictionaryShared::adjust_lambda_proxy_class_dictionary() {
1341 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
1342 AdjustLambdaProxyClassInfo adjuster;
1343 _dumptime_lambda_proxy_class_dictionary->iterate(&adjuster);
1344 }
1345 }
1346
1347 void SystemDictionaryShared::serialize_dictionary_headers(SerializeClosure* soc,
1348 bool is_static_archive) {
1349 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
1350 if (is_static_archive) {
1351 _builtin_dictionary.serialize_header(soc);
1352 _unregistered_dictionary.serialize_header(soc);
1353 if (dynamic_mapinfo == NULL || DynamicDumpSharedSpaces || (dynamic_mapinfo != NULL && UseSharedSpaces)) {
1354 _lambda_proxy_class_dictionary.serialize_header(soc);
1355 }
1356 } else {
1357 _dynamic_builtin_dictionary.serialize_header(soc);
1358 _dynamic_unregistered_dictionary.serialize_header(soc);
1359 if (DynamicDumpSharedSpaces) {
1360 _lambda_proxy_class_dictionary.serialize_header(soc);
1361 } else {
1362 _dynamic_lambda_proxy_class_dictionary.serialize_header(soc);
1363 }
1364 }
1365 }
1366
1367 void SystemDictionaryShared::serialize_vm_classes(SerializeClosure* soc) {
1368 for (auto id : EnumRange<vmClassID>{}) {
1369 soc->do_ptr((void**)vmClasses::klass_addr_at(id));
1370 }
1371 }
1372
1373 const RunTimeClassInfo*
1374 SystemDictionaryShared::find_record(RunTimeSharedDictionary* static_dict, RunTimeSharedDictionary* dynamic_dict, Symbol* name) {
1375 if (!UseSharedSpaces || !name->is_shared()) {
1376 // The names of all shared classes must also be a shared Symbol.
1377 return NULL;
1378 }
1379
1380 unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary_quick(name);
1381 const RunTimeClassInfo* record = NULL;
1382 if (DynamicArchive::is_mapped()) {
1383 // Those regenerated holder classes are in dynamic archive
1384 if (name == vmSymbols::java_lang_invoke_Invokers_Holder() ||
1385 name == vmSymbols::java_lang_invoke_DirectMethodHandle_Holder() ||
1386 name == vmSymbols::java_lang_invoke_LambdaForm_Holder() ||
1387 name == vmSymbols::java_lang_invoke_DelegatingMethodHandle_Holder()) {
1388 record = dynamic_dict->lookup(name, hash, 0);
1389 if (record != nullptr) {
1390 return record;
1391 }
1392 }
1393 }
1394
1395 if (!MetaspaceShared::is_shared_dynamic(name)) {
1396 // The names of all shared classes in the static dict must also be in the
1397 // static archive
1398 record = static_dict->lookup(name, hash, 0);
1399 }
1400
1401 if (record == NULL && DynamicArchive::is_mapped()) {
1402 record = dynamic_dict->lookup(name, hash, 0);
1403 }
1404
1405 return record;
1406 }
1407
1408 InstanceKlass* SystemDictionaryShared::find_builtin_class(Symbol* name) {
1409 const RunTimeClassInfo* record = find_record(&_builtin_dictionary, &_dynamic_builtin_dictionary, name);
1410 if (record != NULL) {
1411 assert(!record->_klass->is_hidden(), "hidden class cannot be looked up by name");
1412 assert(check_alignment(record->_klass), "Address not aligned");
1413 return record->_klass;
1414 } else {
1415 return NULL;
1416 }
1417 }
1418
1419 void SystemDictionaryShared::update_shared_entry(InstanceKlass* k, int id) {
1420 assert(DumpSharedSpaces, "supported only when dumping");
1421 DumpTimeClassInfo* info = find_or_allocate_info_for(k);
1422 info->_id = id;
1423 }
1424
1425 const char* class_loader_name_for_shared(Klass* k) {
1426 assert(k != nullptr, "Sanity");
1427 assert(k->is_shared(), "Must be");
1428 assert(k->is_instance_klass(), "Must be");
1429 InstanceKlass* ik = InstanceKlass::cast(k);
1430 if (ik->is_shared_boot_class()) {
1431 return "boot_loader";
1432 } else if (ik->is_shared_platform_class()) {
1433 return "platform_loader";
1434 } else if (ik->is_shared_app_class()) {
1435 return "app_loader";
1436 } else if (ik->is_shared_unregistered_class()) {
1437 return "unregistered_loader";
1438 } else {
1439 return "unknown loader";
1440 }
1441 }
1442
1443 class SharedDictionaryPrinter : StackObj {
1444 outputStream* _st;
1445 int _index;
1446 public:
1447 SharedDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
1448
1449 void do_value(const RunTimeClassInfo* record) {
1450 ResourceMark rm;
1451 _st->print_cr("%4d: %s %s", _index++, record->_klass->external_name(),
1452 class_loader_name_for_shared(record->_klass));
1453 }
1454 int index() const { return _index; }
1455 };
1456
1457 class SharedLambdaDictionaryPrinter : StackObj {
1458 outputStream* _st;
1459 int _index;
1460 public:
1461 SharedLambdaDictionaryPrinter(outputStream* st, int idx) : _st(st), _index(idx) {}
1462
1463 void do_value(const RunTimeLambdaProxyClassInfo* record) {
1464 if (record->proxy_klass_head()->lambda_proxy_is_available()) {
1465 ResourceMark rm;
1466 Klass* k = record->proxy_klass_head();
1467 while (k != nullptr) {
1468 _st->print_cr("%4d: %s %s", _index++, k->external_name(),
1469 class_loader_name_for_shared(k));
1470 k = k->next_link();
1471 }
1472 }
1473 }
1474 };
1475
1476 void SystemDictionaryShared::print_on(const char* prefix,
1477 RunTimeSharedDictionary* builtin_dictionary,
1478 RunTimeSharedDictionary* unregistered_dictionary,
1479 LambdaProxyClassDictionary* lambda_dictionary,
1480 outputStream* st) {
1481 st->print_cr("%sShared Dictionary", prefix);
1482 SharedDictionaryPrinter p(st);
1483 st->print_cr("%sShared Builtin Dictionary", prefix);
1484 builtin_dictionary->iterate(&p);
1485 st->print_cr("%sShared Unregistered Dictionary", prefix);
1486 unregistered_dictionary->iterate(&p);
1487 if (!lambda_dictionary->empty()) {
1488 st->print_cr("%sShared Lambda Dictionary", prefix);
1489 SharedLambdaDictionaryPrinter ldp(st, p.index());
1490 lambda_dictionary->iterate(&ldp);
1491 }
1492 }
1493
1494 void SystemDictionaryShared::print_shared_archive(outputStream* st, bool is_static) {
1495 if (UseSharedSpaces) {
1496 if (is_static) {
1497 print_on("", &_builtin_dictionary, &_unregistered_dictionary, &_lambda_proxy_class_dictionary, st);
1498 } else {
1499 if (DynamicArchive::is_mapped()) {
1500 print_on("", &_dynamic_builtin_dictionary, &_dynamic_unregistered_dictionary,
1501 &_dynamic_lambda_proxy_class_dictionary, st);
1502 }
1503 }
1504 }
1505 }
1506
1507 void SystemDictionaryShared::print_on(outputStream* st) {
1508 if (UseSharedSpaces) {
1509 print_on("", &_builtin_dictionary, &_unregistered_dictionary, &_lambda_proxy_class_dictionary, st);
1510 if (DynamicArchive::is_mapped()) {
1511 print_on("", &_dynamic_builtin_dictionary, &_dynamic_unregistered_dictionary,
1512 &_dynamic_lambda_proxy_class_dictionary, st);
1513 }
1514 }
1515 }
1516
1517 void SystemDictionaryShared::print_table_statistics(outputStream* st) {
1518 if (UseSharedSpaces) {
1519 _builtin_dictionary.print_table_statistics(st, "Builtin Shared Dictionary");
1520 _unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
1521 _lambda_proxy_class_dictionary.print_table_statistics(st, "Lambda Shared Dictionary");
1522 if (DynamicArchive::is_mapped()) {
1523 _dynamic_builtin_dictionary.print_table_statistics(st, "Dynamic Builtin Shared Dictionary");
1524 _dynamic_unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
1525 _dynamic_lambda_proxy_class_dictionary.print_table_statistics(st, "Dynamic Lambda Shared Dictionary");
1526 }
1527 }
1528 }
1529
1530 bool SystemDictionaryShared::is_dumptime_table_empty() {
1531 if (_dumptime_table == NULL) {
1532 return true;
1533 }
1534 _dumptime_table->update_counts();
1535 if (_dumptime_table->count_of(true) == 0 && _dumptime_table->count_of(false) == 0){
1536 return true;
1537 }
1538 return false;
1539 }
1540
1541 class CloneDumpTimeClassTable: public StackObj {
1542 DumpTimeSharedClassTable* _table;
1543 DumpTimeSharedClassTable* _cloned_table;
1544 public:
1545 CloneDumpTimeClassTable(DumpTimeSharedClassTable* table, DumpTimeSharedClassTable* clone) :
1546 _table(table), _cloned_table(clone) {
1547 assert(_table != NULL, "_dumptime_table is NULL");
1548 assert(_cloned_table != NULL, "_cloned_table is NULL");
1549 }
1550 bool do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
1551 if (!info.is_excluded()) {
1552 bool created;
1553 _cloned_table->put_if_absent(k, info.clone(), &created);
1554 }
1555 return true; // keep on iterating
1556 }
1557 };
1558
1559 class CloneDumpTimeLambdaProxyClassTable: StackObj {
1560 DumpTimeLambdaProxyClassDictionary* _table;
1561 DumpTimeLambdaProxyClassDictionary* _cloned_table;
1562 public:
1563 CloneDumpTimeLambdaProxyClassTable(DumpTimeLambdaProxyClassDictionary* table,
1564 DumpTimeLambdaProxyClassDictionary* clone) :
1565 _table(table), _cloned_table(clone) {
1566 assert(_table != NULL, "_dumptime_table is NULL");
1567 assert(_cloned_table != NULL, "_cloned_table is NULL");
1568 }
1569
1570 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1571 assert_lock_strong(DumpTimeTable_lock);
1572 bool created;
1573 // make copies then store in _clone_table
1574 LambdaProxyClassKey keyCopy = key;
1575 _cloned_table->put_if_absent(keyCopy, info.clone(), &created);
1576 ++ _cloned_table->_count;
1577 return true; // keep on iterating
1578 }
1579 };
1580
1581 void SystemDictionaryShared::clone_dumptime_tables() {
1582 Arguments::assert_is_dumping_archive();
1583 assert_lock_strong(DumpTimeTable_lock);
1584 if (_dumptime_table != NULL) {
1585 assert(_cloned_dumptime_table == NULL, "_cloned_dumptime_table must be cleaned");
1586 _cloned_dumptime_table = new (ResourceObj::C_HEAP, mtClass) DumpTimeSharedClassTable;
1587 CloneDumpTimeClassTable copy_classes(_dumptime_table, _cloned_dumptime_table);
1588 _dumptime_table->iterate(©_classes);
1589 _cloned_dumptime_table->update_counts();
1590 }
1591 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
1592 assert(_cloned_dumptime_lambda_proxy_class_dictionary == NULL,
1593 "_cloned_dumptime_lambda_proxy_class_dictionary must be cleaned");
1594 _cloned_dumptime_lambda_proxy_class_dictionary =
1595 new (ResourceObj::C_HEAP, mtClass) DumpTimeLambdaProxyClassDictionary;
1596 CloneDumpTimeLambdaProxyClassTable copy_proxy_classes(_dumptime_lambda_proxy_class_dictionary,
1597 _cloned_dumptime_lambda_proxy_class_dictionary);
1598 _dumptime_lambda_proxy_class_dictionary->iterate(©_proxy_classes);
1599 }
1600 }
1601
1602 void SystemDictionaryShared::restore_dumptime_tables() {
1603 assert_lock_strong(DumpTimeTable_lock);
1604 delete _dumptime_table;
1605 _dumptime_table = _cloned_dumptime_table;
1606 _cloned_dumptime_table = NULL;
1607 delete _dumptime_lambda_proxy_class_dictionary;
1608 _dumptime_lambda_proxy_class_dictionary = _cloned_dumptime_lambda_proxy_class_dictionary;
1609 _cloned_dumptime_lambda_proxy_class_dictionary = NULL;
1610 }
1611
1612 class CleanupDumpTimeLambdaProxyClassTable: StackObj {
1613 public:
1614 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1615 assert_lock_strong(DumpTimeTable_lock);
1616 InstanceKlass* caller_ik = key.caller_ik();
1617 if (SystemDictionaryShared::check_for_exclusion(caller_ik, NULL)) {
1618 // If the caller class is excluded, unregister all the associated lambda proxy classes
1619 // so that they will not be included in the CDS archive.
1620 for (int i = info._proxy_klasses->length() - 1; i >= 0; i--) {
1621 SystemDictionaryShared::reset_registered_lambda_proxy_class(info._proxy_klasses->at(i));
1622 info._proxy_klasses->remove_at(i);
1623 }
1624 }
1625 for (int i = info._proxy_klasses->length() - 1; i >= 0; i--) {
1626 InstanceKlass* ik = info._proxy_klasses->at(i);
1627 if (SystemDictionaryShared::check_for_exclusion(ik, NULL)) {
1628 SystemDictionaryShared::reset_registered_lambda_proxy_class(ik);
1629 info._proxy_klasses->remove_at(i);
1630 }
1631 }
1632 return info._proxy_klasses->length() == 0 ? true /* delete the node*/ : false;
1633 }
1634 };
1635
1636 void SystemDictionaryShared::cleanup_lambda_proxy_class_dictionary() {
1637 assert_lock_strong(DumpTimeTable_lock);
1638 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
1639 CleanupDumpTimeLambdaProxyClassTable cleanup_proxy_classes;
1640 _dumptime_lambda_proxy_class_dictionary->unlink(&cleanup_proxy_classes);
1641 }
1642 }
1643
1644 #if INCLUDE_CDS_JAVA_HEAP
1645
1646 class ArchivedMirrorPatcher {
1647 protected:
1648 static void update(Klass* k) {
1649 if (k->has_archived_mirror_index()) {
1650 oop m = k->archived_java_mirror();
1651 if (m != NULL) {
1652 java_lang_Class::update_archived_mirror_native_pointers(m);
1653 }
1654 }
1655 }
1656
1657 public:
1658 static void update_array_klasses(Klass* ak) {
1659 while (ak != NULL) {
1660 update(ak);
1661 ak = ArrayKlass::cast(ak)->higher_dimension();
1662 }
1663 }
1664
1665 void do_value(const RunTimeClassInfo* info) {
1666 InstanceKlass* ik = info->_klass;
1667 update(ik);
1668 update_array_klasses(ik->array_klasses());
1669 }
1670 };
1671
1672 class ArchivedLambdaMirrorPatcher : public ArchivedMirrorPatcher {
1673 public:
1674 void do_value(const RunTimeLambdaProxyClassInfo* info) {
1675 InstanceKlass* ik = info->proxy_klass_head();
1676 while (ik != NULL) {
1677 update(ik);
1678 Klass* k = ik->next_link();
1679 ik = (k != NULL) ? InstanceKlass::cast(k) : NULL;
1680 }
1681 }
1682 };
1683
1684 void SystemDictionaryShared::update_archived_mirror_native_pointers_for(RunTimeSharedDictionary* dict) {
1685 ArchivedMirrorPatcher patcher;
1686 dict->iterate(&patcher);
1687 }
1688
1689 void SystemDictionaryShared::update_archived_mirror_native_pointers_for(LambdaProxyClassDictionary* dict) {
1690 ArchivedLambdaMirrorPatcher patcher;
1691 dict->iterate(&patcher);
1692 }
1693
1694 void SystemDictionaryShared::update_archived_mirror_native_pointers() {
1695 if (!HeapShared::are_archived_mirrors_available()) {
1696 return;
1697 }
1698 if (MetaspaceShared::relocation_delta() == 0) {
1699 return;
1700 }
1701 update_archived_mirror_native_pointers_for(&_builtin_dictionary);
1702 update_archived_mirror_native_pointers_for(&_unregistered_dictionary);
1703 update_archived_mirror_native_pointers_for(&_lambda_proxy_class_dictionary);
1704
1705 for (int t = T_BOOLEAN; t <= T_LONG; t++) {
1706 Klass* k = Universe::typeArrayKlassObj((BasicType)t);
1707 ArchivedMirrorPatcher::update_array_klasses(k);
1708 }
1709 }
1710 #endif