1 /*
2 * Copyright (c) 2014, 2020, 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 "classfile/classFileStream.hpp"
27 #include "classfile/classListParser.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/classLoaderDataGraph.hpp"
31 #include "classfile/classLoaderExt.hpp"
32 #include "classfile/dictionary.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/systemDictionaryShared.hpp"
37 #include "classfile/verificationType.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "logging/log.hpp"
40 #include "memory/allocation.hpp"
41 #include "memory/archiveUtils.hpp"
42 #include "memory/dynamicArchive.hpp"
43 #include "memory/filemap.hpp"
44 #include "memory/heapShared.hpp"
45 #include "memory/metadataFactory.hpp"
46 #include "memory/metaspaceClosure.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/klass.inline.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/typeArrayOop.inline.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/java.hpp"
57 #include "runtime/javaCalls.hpp"
58 #include "runtime/mutexLocker.hpp"
59 #include "utilities/hashtable.inline.hpp"
60 #include "utilities/resourceHash.hpp"
61 #include "utilities/stringUtils.hpp"
62
63
64 objArrayOop SystemDictionaryShared::_shared_protection_domains = NULL;
65 objArrayOop SystemDictionaryShared::_shared_jar_urls = NULL;
66 objArrayOop SystemDictionaryShared::_shared_jar_manifests = NULL;
67 DEBUG_ONLY(bool SystemDictionaryShared::_no_class_loading_should_happen = false;)
68
69 class DumpTimeSharedClassInfo: public CHeapObj<mtClass> {
70 bool _excluded;
71 public:
72 struct DTLoaderConstraint {
73 Symbol* _name;
74 char _loader_type1;
75 char _loader_type2;
76 DTLoaderConstraint(Symbol* name, char l1, char l2) : _name(name), _loader_type1(l1), _loader_type2(l2) {
77 _name->increment_refcount();
78 }
79 DTLoaderConstraint() : _name(NULL), _loader_type1('0'), _loader_type2('0') {}
80 bool equals(const DTLoaderConstraint& t) {
81 return t._name == _name &&
82 ((t._loader_type1 == _loader_type1 && t._loader_type2 == _loader_type2) ||
83 (t._loader_type2 == _loader_type1 && t._loader_type1 == _loader_type2));
84 }
85 };
86
87 struct DTVerifierConstraint {
88 Symbol* _name;
89 Symbol* _from_name;
90 DTVerifierConstraint() : _name(NULL), _from_name(NULL) {}
91 DTVerifierConstraint(Symbol* n, Symbol* fn) : _name(n), _from_name(fn) {
92 _name->increment_refcount();
93 _from_name->increment_refcount();
94 }
95 };
96
97 InstanceKlass* _klass;
98 bool _failed_verification;
99 int _id;
100 int _clsfile_size;
101 int _clsfile_crc32;
102 GrowableArray<DTVerifierConstraint>* _verifier_constraints;
103 GrowableArray<char>* _verifier_constraint_flags;
104 bool _is_archived_lambda_proxy;
105 GrowableArray<DTLoaderConstraint>* _loader_constraints;
106
107 DumpTimeSharedClassInfo() {
108 _klass = NULL;
109 _failed_verification = false;
110 _id = -1;
111 _clsfile_size = -1;
112 _clsfile_crc32 = -1;
113 _excluded = false;
114 _verifier_constraints = NULL;
115 _verifier_constraint_flags = NULL;
116 _is_archived_lambda_proxy = false;
117 _loader_constraints = NULL;
118 }
119
120 void add_verification_constraint(InstanceKlass* k, Symbol* name,
121 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object);
122 void record_linking_constraint(Symbol* name, Handle loader1, Handle loader2);
123
124 bool is_builtin() {
125 return SystemDictionaryShared::is_builtin(_klass);
126 }
127
128 int num_verifier_constraints() {
129 if (_verifier_constraint_flags != NULL) {
130 return _verifier_constraint_flags->length();
131 } else {
132 return 0;
133 }
134 }
135
136 int num_loader_constraints() {
137 if (_loader_constraints != NULL) {
138 return _loader_constraints->length();
139 } else {
140 return 0;
141 }
142 }
143
144 void metaspace_pointers_do(MetaspaceClosure* it) {
145 it->push(&_klass);
146 if (_verifier_constraints != NULL) {
147 for (int i = 0; i < _verifier_constraints->length(); i++) {
148 DTVerifierConstraint* cons = _verifier_constraints->adr_at(i);
149 it->push(&cons->_name);
150 it->push(&cons->_from_name);
151 }
152 }
153 if (_loader_constraints != NULL) {
154 for (int i = 0; i < _loader_constraints->length(); i++) {
155 DTLoaderConstraint* lc = _loader_constraints->adr_at(i);
156 it->push(&lc->_name);
157 }
158 }
159 }
160
161 void set_excluded() {
162 _excluded = true;
163 }
164
165 bool is_excluded() {
166 // _klass may become NULL due to DynamicArchiveBuilder::set_to_null
167 return _excluded || _failed_verification || _klass == NULL;
168 }
169
170 void set_failed_verification() {
171 _failed_verification = true;
172 }
173
174 bool failed_verification() {
175 return _failed_verification;
176 }
177 };
178
179 inline unsigned DumpTimeSharedClassTable_hash(InstanceKlass* const& k) {
180 if (DumpSharedSpaces) {
181 // Deterministic archive contents
182 uintx delta = k->name() - MetaspaceShared::symbol_rs_base();
183 return primitive_hash<uintx>(delta);
184 } else {
185 // Deterministic archive is not possible because classes can be loaded
186 // in multiple threads.
187 return primitive_hash<InstanceKlass*>(k);
188 }
189 }
190
191 class DumpTimeSharedClassTable: public ResourceHashtable<
192 InstanceKlass*,
193 DumpTimeSharedClassInfo,
194 &DumpTimeSharedClassTable_hash,
195 primitive_equals<InstanceKlass*>,
196 15889, // prime number
197 ResourceObj::C_HEAP>
198 {
199 int _builtin_count;
200 int _unregistered_count;
201 public:
202 DumpTimeSharedClassInfo* find_or_allocate_info_for(InstanceKlass* k) {
203 bool created = false;
204 DumpTimeSharedClassInfo* p = put_if_absent(k, &created);
205 if (created) {
206 assert(!SystemDictionaryShared::no_class_loading_should_happen(),
207 "no new classes can be loaded while dumping archive");
208 p->_klass = k;
209 } else {
210 assert(p->_klass == k, "Sanity");
211 }
212 return p;
213 }
214
215 class CountClassByCategory : StackObj {
216 DumpTimeSharedClassTable* _table;
217 public:
218 CountClassByCategory(DumpTimeSharedClassTable* table) : _table(table) {}
219 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
220 if (!info.is_excluded()) {
221 if (info.is_builtin()) {
222 ++ _table->_builtin_count;
223 } else {
224 ++ _table->_unregistered_count;
225 }
226 }
227 return true; // keep on iterating
228 }
229 };
230
231 void update_counts() {
232 _builtin_count = 0;
233 _unregistered_count = 0;
234 CountClassByCategory counter(this);
235 iterate(&counter);
236 }
237
238 int count_of(bool is_builtin) const {
239 if (is_builtin) {
240 return _builtin_count;
241 } else {
242 return _unregistered_count;
243 }
244 }
245 };
246
247 class LambdaProxyClassKey {
248 template <typename T> static void original_to_target(T& field) {
249 if (field != NULL) {
250 field = DynamicArchive::original_to_target(field);
251 ArchivePtrMarker::mark_pointer(&field);
252 }
253 }
254
255 InstanceKlass* _caller_ik;
256 Symbol* _invoked_name;
257 Symbol* _invoked_type;
258 Symbol* _method_type;
259 Method* _member_method;
260 Symbol* _instantiated_method_type;
261
262 public:
263 LambdaProxyClassKey(InstanceKlass* caller_ik,
264 Symbol* invoked_name,
265 Symbol* invoked_type,
266 Symbol* method_type,
267 Method* member_method,
268 Symbol* instantiated_method_type) :
269 _caller_ik(caller_ik),
270 _invoked_name(invoked_name),
271 _invoked_type(invoked_type),
272 _method_type(method_type),
273 _member_method(member_method),
274 _instantiated_method_type(instantiated_method_type) {}
275
276 void original_to_target() {
277 original_to_target(_caller_ik);
278 original_to_target(_instantiated_method_type);
279 original_to_target(_invoked_name);
280 original_to_target(_invoked_type);
281 original_to_target(_member_method);
282 original_to_target(_method_type);
283 }
284
285 bool equals(LambdaProxyClassKey const& other) const {
286 return _caller_ik == other._caller_ik &&
287 _invoked_name == other._invoked_name &&
288 _invoked_type == other._invoked_type &&
289 _method_type == other._method_type &&
290 _member_method == other._member_method &&
291 _instantiated_method_type == other._instantiated_method_type;
292 }
293
294 unsigned int hash() const {
295 return SystemDictionaryShared::hash_for_shared_dictionary(_caller_ik) +
296 SystemDictionaryShared::hash_for_shared_dictionary(_invoked_name) +
297 SystemDictionaryShared::hash_for_shared_dictionary(_invoked_type) +
298 SystemDictionaryShared::hash_for_shared_dictionary(_method_type) +
299 SystemDictionaryShared::hash_for_shared_dictionary(_instantiated_method_type);
300 }
301
302 unsigned int dumptime_hash() const {
303 return primitive_hash<InstanceKlass*>(_caller_ik) +
304 primitive_hash<Symbol*>(_invoked_name) +
305 primitive_hash<Symbol*>(_invoked_type) +
306 primitive_hash<Symbol*>(_method_type) +
307 primitive_hash<Symbol*>(_instantiated_method_type);
308 }
309
310 static inline unsigned int DUMPTIME_HASH(LambdaProxyClassKey const& key) {
311 return (key.dumptime_hash());
312 }
313
314 static inline bool DUMPTIME_EQUALS(
315 LambdaProxyClassKey const& k1, LambdaProxyClassKey const& k2) {
316 return (k1.equals(k2));
317 }
318 };
319
320
321 class DumpTimeLambdaProxyClassInfo {
322 public:
323 GrowableArray<InstanceKlass*>* _proxy_klass;
324 DumpTimeLambdaProxyClassInfo() : _proxy_klass(NULL) {}
325 void add_proxy_klass(InstanceKlass* proxy_klass) {
326 if (_proxy_klass == NULL) {
327 _proxy_klass = new (ResourceObj::C_HEAP, mtInternal)GrowableArray<InstanceKlass*>(5, true);
328 }
329 assert(_proxy_klass != NULL, "sanity");
330 _proxy_klass->append(proxy_klass);
331 }
332 };
333
334 class RunTimeLambdaProxyClassInfo {
335 LambdaProxyClassKey _key;
336 InstanceKlass* _proxy_klass;
337 public:
338 RunTimeLambdaProxyClassInfo(LambdaProxyClassKey key, InstanceKlass* proxy_klass) :
339 _key(key), _proxy_klass(proxy_klass) {}
340
341 InstanceKlass* proxy_klass() const { return _proxy_klass; }
342
343 // Used by LambdaProxyClassDictionary to implement OffsetCompactHashtable::EQUALS
344 static inline bool EQUALS(
345 const RunTimeLambdaProxyClassInfo* value, LambdaProxyClassKey* key, int len_unused) {
346 return (value->_key.equals(*key));
347 }
348 void init(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
349 _key = key;
350 _key.original_to_target();
351 _proxy_klass = DynamicArchive::original_to_target(info._proxy_klass->at(0));
352 ArchivePtrMarker::mark_pointer(&_proxy_klass);
353 }
354
355 unsigned int hash() const {
356 return _key.hash();
357 }
358 };
359
360 class LambdaProxyClassDictionary : public OffsetCompactHashtable<
361 LambdaProxyClassKey*,
362 const RunTimeLambdaProxyClassInfo*,
363 RunTimeLambdaProxyClassInfo::EQUALS> {};
364
365 LambdaProxyClassDictionary _lambda_proxy_class_dictionary;
366
367 class DumpTimeLambdaProxyClassDictionary
368 : public ResourceHashtable<LambdaProxyClassKey,
369 DumpTimeLambdaProxyClassInfo,
370 LambdaProxyClassKey::DUMPTIME_HASH,
371 LambdaProxyClassKey::DUMPTIME_EQUALS,
372 137, // prime number
373 ResourceObj::C_HEAP> {
374 public:
375 int _count;
376 };
377
378 DumpTimeLambdaProxyClassDictionary* _dumptime_lambda_proxy_class_dictionary = NULL;
379
380 static void add_to_dump_time_lambda_proxy_class_dictionary(LambdaProxyClassKey key,
381 InstanceKlass* proxy_klass) {
382 if (_dumptime_lambda_proxy_class_dictionary == NULL) {
383 _dumptime_lambda_proxy_class_dictionary =
384 new (ResourceObj::C_HEAP, mtClass)DumpTimeLambdaProxyClassDictionary();
385 }
386 DumpTimeLambdaProxyClassInfo* lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
387 if (lambda_info == NULL) {
388 DumpTimeLambdaProxyClassInfo info;
389 info.add_proxy_klass(proxy_klass);
390 _dumptime_lambda_proxy_class_dictionary->put(key, info);
391 //lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
392 //assert(lambda_info->_proxy_klass == proxy_klass, "must be"); // debug only -- remove
393 ++_dumptime_lambda_proxy_class_dictionary->_count;
394 } else {
395 lambda_info->add_proxy_klass(proxy_klass);
396 }
397 }
398
399 class RunTimeSharedClassInfo {
400 public:
401 struct CrcInfo {
402 int _clsfile_size;
403 int _clsfile_crc32;
404 };
405
406 // This is different than DumpTimeSharedClassInfo::DTVerifierConstraint. We use
407 // u4 instead of Symbol* to save space on 64-bit CPU.
408 struct RTVerifierConstraint {
409 u4 _name;
410 u4 _from_name;
411 Symbol* name() { return (Symbol*)(SharedBaseAddress + _name);}
412 Symbol* from_name() { return (Symbol*)(SharedBaseAddress + _from_name); }
413 };
414
415 struct RTLoaderConstraint {
416 u4 _name;
417 char _loader_type1;
418 char _loader_type2;
419 Symbol* constraint_name() {
420 return (Symbol*)(SharedBaseAddress + _name);
421 }
422 };
423
424 InstanceKlass* _klass;
425 int _num_verifier_constraints;
426 int _num_loader_constraints;
427
428 // optional CrcInfo _crc; (only for UNREGISTERED classes)
429 // optional InstanceKlass* _nest_host
430 // optional RTLoaderConstraint _loader_constraint_types[_num_loader_constraints]
431 // optional RTVerifierConstraint _verifier_constraints[_num_verifier_constraints]
432 // optional char _verifier_constraint_flags[_num_verifier_constraints]
433
434 private:
435 static size_t header_size_size() {
436 return sizeof(RunTimeSharedClassInfo);
437 }
438 static size_t crc_size(InstanceKlass* klass) {
439 if (!SystemDictionaryShared::is_builtin(klass)) {
440 return sizeof(CrcInfo);
441 } else {
442 return 0;
443 }
444 }
445 static size_t verifier_constraints_size(int num_verifier_constraints) {
446 return sizeof(RTVerifierConstraint) * num_verifier_constraints;
447 }
448 static size_t verifier_constraint_flags_size(int num_verifier_constraints) {
449 return sizeof(char) * num_verifier_constraints;
450 }
451 static size_t loader_constraints_size(int num_loader_constraints) {
452 return sizeof(RTLoaderConstraint) * num_loader_constraints;
453 }
454 static size_t nest_host_size(InstanceKlass* klass) {
455 if (klass->is_hidden()) {
456 return sizeof(InstanceKlass*);
457 } else {
458 return 0;
459 }
460 }
461
462 public:
463 static size_t byte_size(InstanceKlass* klass, int num_verifier_constraints, int num_loader_constraints) {
464 return header_size_size() +
465 crc_size(klass) +
466 nest_host_size(klass) +
467 loader_constraints_size(num_loader_constraints) +
468 verifier_constraints_size(num_verifier_constraints) +
469 verifier_constraint_flags_size(num_verifier_constraints);
470 }
471
472 private:
473 size_t crc_offset() const {
474 return header_size_size();
475 }
476
477 size_t nest_host_offset() const {
478 return crc_offset() + crc_size(_klass);
479 }
480
481 size_t loader_constraints_offset() const {
482 return nest_host_offset() + nest_host_size(_klass);
483 }
484 size_t verifier_constraints_offset() const {
485 return loader_constraints_offset() + loader_constraints_size(_num_loader_constraints);
486 }
487 size_t verifier_constraint_flags_offset() const {
488 return verifier_constraints_offset() + verifier_constraints_size(_num_verifier_constraints);
489 }
490
491 void check_verifier_constraint_offset(int i) const {
492 assert(0 <= i && i < _num_verifier_constraints, "sanity");
493 }
494
495 void check_loader_constraint_offset(int i) const {
496 assert(0 <= i && i < _num_loader_constraints, "sanity");
497 }
498
499 public:
500 CrcInfo* crc() const {
501 assert(crc_size(_klass) > 0, "must be");
502 return (CrcInfo*)(address(this) + crc_offset());
503 }
504 RTVerifierConstraint* verifier_constraints() {
505 assert(_num_verifier_constraints > 0, "sanity");
506 return (RTVerifierConstraint*)(address(this) + verifier_constraints_offset());
507 }
508 RTVerifierConstraint* verifier_constraint_at(int i) {
509 check_verifier_constraint_offset(i);
510 return verifier_constraints() + i;
511 }
512
513 char* verifier_constraint_flags() {
514 assert(_num_verifier_constraints > 0, "sanity");
515 return (char*)(address(this) + verifier_constraint_flags_offset());
516 }
517
518 InstanceKlass** nest_host_addr() {
519 assert(_klass->is_hidden(), "sanity");
520 return (InstanceKlass**)(address(this) + nest_host_offset());
521 }
522 InstanceKlass* nest_host() {
523 return *nest_host_addr();
524 }
525 void set_nest_host(InstanceKlass* k) {
526 *nest_host_addr() = k;
527 ArchivePtrMarker::mark_pointer((address*)nest_host_addr());
528 }
529
530 RTLoaderConstraint* loader_constraints() {
531 assert(_num_loader_constraints > 0, "sanity");
532 return (RTLoaderConstraint*)(address(this) + loader_constraints_offset());
533 }
534
535 RTLoaderConstraint* loader_constraint_at(int i) {
536 check_loader_constraint_offset(i);
537 return loader_constraints() + i;
538 }
539
540 static u4 object_delta_u4(Symbol* sym) {
541 if (DynamicDumpSharedSpaces) {
542 sym = DynamicArchive::original_to_target(sym);
543 }
544 return MetaspaceShared::object_delta_u4(sym);
545 }
546
547 void init(DumpTimeSharedClassInfo& info) {
548 _klass = info._klass;
549 if (!SystemDictionaryShared::is_builtin(_klass)) {
550 CrcInfo* c = crc();
551 c->_clsfile_size = info._clsfile_size;
552 c->_clsfile_crc32 = info._clsfile_crc32;
553 }
554 _num_verifier_constraints = info.num_verifier_constraints();
555 _num_loader_constraints = info.num_loader_constraints();
556 int i;
557 if (_num_verifier_constraints > 0) {
558 RTVerifierConstraint* vf_constraints = verifier_constraints();
559 char* flags = verifier_constraint_flags();
560 for (i = 0; i < _num_verifier_constraints; i++) {
561 vf_constraints[i]._name = object_delta_u4(info._verifier_constraints->at(i)._name);
562 vf_constraints[i]._from_name = object_delta_u4(info._verifier_constraints->at(i)._from_name);
563 }
564 for (i = 0; i < _num_verifier_constraints; i++) {
565 flags[i] = info._verifier_constraint_flags->at(i);
566 }
567 }
568
569 if (_num_loader_constraints > 0) {
570 RTLoaderConstraint* ld_constraints = loader_constraints();
571 for (i = 0; i < _num_loader_constraints; i++) {
572 ld_constraints[i]._name = object_delta_u4(info._loader_constraints->at(i)._name);
573 ld_constraints[i]._loader_type1 = info._loader_constraints->at(i)._loader_type1;
574 ld_constraints[i]._loader_type2 = info._loader_constraints->at(i)._loader_type2;
575 }
576 }
577 if (DynamicDumpSharedSpaces) {
578 if (_klass->is_hidden()) {
579 Thread* THREAD = Thread::current();
580 InstanceKlass* n_h = _klass->nest_host(THREAD);
581 n_h = DynamicArchive::original_to_target(n_h);
582 set_nest_host(n_h);
583 ArchivePtrMarker::mark_pointer(&n_h);
584 }
585 _klass = DynamicArchive::original_to_target(info._klass);
586 }
587 ArchivePtrMarker::mark_pointer(&_klass);
588 }
589
590 bool matches(int clsfile_size, int clsfile_crc32) const {
591 return crc()->_clsfile_size == clsfile_size &&
592 crc()->_clsfile_crc32 == clsfile_crc32;
593 }
594
595 char verifier_constraint_flag(int i) {
596 check_verifier_constraint_offset(i);
597 return verifier_constraint_flags()[i];
598 }
599
600 private:
601 // ArchiveCompactor::allocate() has reserved a pointer immediately before
602 // archived InstanceKlasses. We can use this slot to do a quick
603 // lookup of InstanceKlass* -> RunTimeSharedClassInfo* without
604 // building a new hashtable.
605 //
606 // info_pointer_addr(klass) --> 0x0100 RunTimeSharedClassInfo*
607 // InstanceKlass* klass --> 0x0108 <C++ vtbl>
608 // 0x0110 fields from Klass ...
609 static RunTimeSharedClassInfo** info_pointer_addr(InstanceKlass* klass) {
610 return &((RunTimeSharedClassInfo**)klass)[-1];
611 }
612
613 public:
614 static RunTimeSharedClassInfo* get_for(InstanceKlass* klass) {
615 assert(klass->is_shared(), "don't call for non-shared class");
616 return *info_pointer_addr(klass);
617 }
618 static void set_for(InstanceKlass* klass, RunTimeSharedClassInfo* record) {
619 if (DynamicDumpSharedSpaces) {
620 klass = DynamicArchive::original_to_buffer(klass);
621 *info_pointer_addr(klass) = DynamicArchive::buffer_to_target(record);
622 } else {
623 *info_pointer_addr(klass) = record;
624 }
625
626 ArchivePtrMarker::mark_pointer(info_pointer_addr(klass));
627 }
628
629 // Used by RunTimeSharedDictionary to implement OffsetCompactHashtable::EQUALS
630 static inline bool EQUALS(
631 const RunTimeSharedClassInfo* value, Symbol* key, int len_unused) {
632 return (value->_klass->name() == key);
633 }
634 };
635
636 class RunTimeSharedDictionary : public OffsetCompactHashtable<
637 Symbol*,
638 const RunTimeSharedClassInfo*,
639 RunTimeSharedClassInfo::EQUALS> {};
640
641 static DumpTimeSharedClassTable* _dumptime_table = NULL;
642 // SystemDictionaries in the base layer static archive
643 static RunTimeSharedDictionary _builtin_dictionary;
644 static RunTimeSharedDictionary _unregistered_dictionary;
645 // SystemDictionaries in the top layer dynamic archive
646 static RunTimeSharedDictionary _dynamic_builtin_dictionary;
647 static RunTimeSharedDictionary _dynamic_unregistered_dictionary;
648
649 oop SystemDictionaryShared::shared_protection_domain(int index) {
650 return _shared_protection_domains->obj_at(index);
651 }
652
653 oop SystemDictionaryShared::shared_jar_url(int index) {
654 return _shared_jar_urls->obj_at(index);
655 }
656
657 oop SystemDictionaryShared::shared_jar_manifest(int index) {
658 return _shared_jar_manifests->obj_at(index);
659 }
660
661 Handle SystemDictionaryShared::get_shared_jar_manifest(int shared_path_index, TRAPS) {
662 Handle manifest ;
663 if (shared_jar_manifest(shared_path_index) == NULL) {
664 SharedClassPathEntry* ent = FileMapInfo::shared_path(shared_path_index);
665 long size = ent->manifest_size();
666 if (size <= 0) {
667 return Handle();
668 }
669
670 // ByteArrayInputStream bais = new ByteArrayInputStream(buf);
671 const char* src = ent->manifest();
672 assert(src != NULL, "No Manifest data");
673 typeArrayOop buf = oopFactory::new_byteArray(size, CHECK_NH);
674 typeArrayHandle bufhandle(THREAD, buf);
675 ArrayAccess<>::arraycopy_from_native(reinterpret_cast<const jbyte*>(src),
676 buf, typeArrayOopDesc::element_offset<jbyte>(0), size);
677
678 Handle bais = JavaCalls::construct_new_instance(SystemDictionary::ByteArrayInputStream_klass(),
679 vmSymbols::byte_array_void_signature(),
680 bufhandle, CHECK_NH);
681
682 // manifest = new Manifest(bais)
683 manifest = JavaCalls::construct_new_instance(SystemDictionary::Jar_Manifest_klass(),
684 vmSymbols::input_stream_void_signature(),
685 bais, CHECK_NH);
686 atomic_set_shared_jar_manifest(shared_path_index, manifest());
687 }
688
689 manifest = Handle(THREAD, shared_jar_manifest(shared_path_index));
690 assert(manifest.not_null(), "sanity");
691 return manifest;
692 }
693
694 Handle SystemDictionaryShared::get_shared_jar_url(int shared_path_index, TRAPS) {
695 Handle url_h;
696 if (shared_jar_url(shared_path_index) == NULL) {
697 JavaValue result(T_OBJECT);
698 const char* path = FileMapInfo::shared_path_name(shared_path_index);
699 Handle path_string = java_lang_String::create_from_str(path, CHECK_(url_h));
700 Klass* classLoaders_klass =
701 SystemDictionary::jdk_internal_loader_ClassLoaders_klass();
702 JavaCalls::call_static(&result, classLoaders_klass,
703 vmSymbols::toFileURL_name(),
704 vmSymbols::toFileURL_signature(),
705 path_string, CHECK_(url_h));
706
707 atomic_set_shared_jar_url(shared_path_index, (oop)result.get_jobject());
708 }
709
710 url_h = Handle(THREAD, shared_jar_url(shared_path_index));
711 assert(url_h.not_null(), "sanity");
712 return url_h;
713 }
714
715 Handle SystemDictionaryShared::get_package_name(Symbol* class_name, TRAPS) {
716 ResourceMark rm(THREAD);
717 Handle pkgname_string;
718 Symbol* pkg = ClassLoader::package_from_class_name(class_name);
719 if (pkg != NULL) { // Package prefix found
720 const char* pkgname = pkg->as_klass_external_name();
721 pkgname_string = java_lang_String::create_from_str(pkgname,
722 CHECK_(pkgname_string));
723 }
724 return pkgname_string;
725 }
726
727 // Define Package for shared app classes from JAR file and also checks for
728 // package sealing (all done in Java code)
729 // See http://docs.oracle.com/javase/tutorial/deployment/jar/sealman.html
730 void SystemDictionaryShared::define_shared_package(Symbol* class_name,
731 Handle class_loader,
732 Handle manifest,
733 Handle url,
734 TRAPS) {
735 assert(SystemDictionary::is_system_class_loader(class_loader()), "unexpected class loader");
736 // get_package_name() returns a NULL handle if the class is in unnamed package
737 Handle pkgname_string = get_package_name(class_name, CHECK);
738 if (pkgname_string.not_null()) {
739 Klass* app_classLoader_klass = SystemDictionary::jdk_internal_loader_ClassLoaders_AppClassLoader_klass();
740 JavaValue result(T_OBJECT);
741 JavaCallArguments args(3);
742 args.set_receiver(class_loader);
743 args.push_oop(pkgname_string);
744 args.push_oop(manifest);
745 args.push_oop(url);
746 JavaCalls::call_virtual(&result, app_classLoader_klass,
747 vmSymbols::defineOrCheckPackage_name(),
748 vmSymbols::defineOrCheckPackage_signature(),
749 &args,
750 CHECK);
751 }
752 }
753
754 // Get the ProtectionDomain associated with the CodeSource from the classloader.
755 Handle SystemDictionaryShared::get_protection_domain_from_classloader(Handle class_loader,
756 Handle url, TRAPS) {
757 // CodeSource cs = new CodeSource(url, null);
758 Handle cs = JavaCalls::construct_new_instance(SystemDictionary::CodeSource_klass(),
759 vmSymbols::url_code_signer_array_void_signature(),
760 url, Handle(), CHECK_NH);
761
762 // protection_domain = SecureClassLoader.getProtectionDomain(cs);
763 Klass* secureClassLoader_klass = SystemDictionary::SecureClassLoader_klass();
764 JavaValue obj_result(T_OBJECT);
765 JavaCalls::call_virtual(&obj_result, class_loader, secureClassLoader_klass,
766 vmSymbols::getProtectionDomain_name(),
767 vmSymbols::getProtectionDomain_signature(),
768 cs, CHECK_NH);
769 return Handle(THREAD, (oop)obj_result.get_jobject());
770 }
771
772 // Returns the ProtectionDomain associated with the JAR file identified by the url.
773 Handle SystemDictionaryShared::get_shared_protection_domain(Handle class_loader,
774 int shared_path_index,
775 Handle url,
776 TRAPS) {
777 Handle protection_domain;
778 if (shared_protection_domain(shared_path_index) == NULL) {
779 Handle pd = get_protection_domain_from_classloader(class_loader, url, THREAD);
780 atomic_set_shared_protection_domain(shared_path_index, pd());
781 }
782
783 // Acquire from the cache because if another thread beats the current one to
784 // set the shared protection_domain and the atomic_set fails, the current thread
785 // needs to get the updated protection_domain from the cache.
786 protection_domain = Handle(THREAD, shared_protection_domain(shared_path_index));
787 assert(protection_domain.not_null(), "sanity");
788 return protection_domain;
789 }
790
791 // Returns the ProtectionDomain associated with the moduleEntry.
792 Handle SystemDictionaryShared::get_shared_protection_domain(Handle class_loader,
793 ModuleEntry* mod, TRAPS) {
794 ClassLoaderData *loader_data = mod->loader_data();
795 if (mod->shared_protection_domain() == NULL) {
796 Symbol* location = mod->location();
797 if (location != NULL) {
798 Handle location_string = java_lang_String::create_from_symbol(
799 location, CHECK_NH);
800 Handle url;
801 JavaValue result(T_OBJECT);
802 if (location->starts_with("jrt:/")) {
803 url = JavaCalls::construct_new_instance(SystemDictionary::URL_klass(),
804 vmSymbols::string_void_signature(),
805 location_string, CHECK_NH);
806 } else {
807 Klass* classLoaders_klass =
808 SystemDictionary::jdk_internal_loader_ClassLoaders_klass();
809 JavaCalls::call_static(&result, classLoaders_klass, vmSymbols::toFileURL_name(),
810 vmSymbols::toFileURL_signature(),
811 location_string, CHECK_NH);
812 url = Handle(THREAD, (oop)result.get_jobject());
813 }
814
815 Handle pd = get_protection_domain_from_classloader(class_loader, url,
816 CHECK_NH);
817 mod->set_shared_protection_domain(loader_data, pd);
818 }
819 }
820
821 Handle protection_domain(THREAD, mod->shared_protection_domain());
822 assert(protection_domain.not_null(), "sanity");
823 return protection_domain;
824 }
825
826 // Initializes the java.lang.Package and java.security.ProtectionDomain objects associated with
827 // the given InstanceKlass.
828 // Returns the ProtectionDomain for the InstanceKlass.
829 Handle SystemDictionaryShared::init_security_info(Handle class_loader, InstanceKlass* ik, PackageEntry* pkg_entry, TRAPS) {
830 Handle pd;
831
832 if (ik != NULL) {
833 int index = ik->shared_classpath_index();
834 assert(index >= 0, "Sanity");
835 SharedClassPathEntry* ent = FileMapInfo::shared_path(index);
836 Symbol* class_name = ik->name();
837
838 if (ent->is_modules_image()) {
839 // For shared app/platform classes originated from the run-time image:
840 // The ProtectionDomains are cached in the corresponding ModuleEntries
841 // for fast access by the VM.
842 // all packages from module image are already created during VM bootstrap in
843 // Modules::define_module().
844 assert(pkg_entry != NULL, "archived class in module image cannot be from unnamed package");
845 ModuleEntry* mod_entry = pkg_entry->module();
846 pd = get_shared_protection_domain(class_loader, mod_entry, THREAD);
847 } else {
848 // For shared app/platform classes originated from JAR files on the class path:
849 // Each of the 3 SystemDictionaryShared::_shared_xxx arrays has the same length
850 // as the shared classpath table in the shared archive (see
851 // FileMap::_shared_path_table in filemap.hpp for details).
852 //
853 // If a shared InstanceKlass k is loaded from the class path, let
854 //
855 // index = k->shared_classpath_index():
856 //
857 // FileMap::_shared_path_table[index] identifies the JAR file that contains k.
858 //
859 // k's protection domain is:
860 //
861 // ProtectionDomain pd = _shared_protection_domains[index];
862 //
863 // and k's Package is initialized using
864 //
865 // manifest = _shared_jar_manifests[index];
866 // url = _shared_jar_urls[index];
867 // define_shared_package(class_name, class_loader, manifest, url, CHECK_(pd));
868 //
869 // Note that if an element of these 3 _shared_xxx arrays is NULL, it will be initialized by
870 // the corresponding SystemDictionaryShared::get_shared_xxx() function.
871 Handle manifest = get_shared_jar_manifest(index, CHECK_(pd));
872 Handle url = get_shared_jar_url(index, CHECK_(pd));
873 define_shared_package(class_name, class_loader, manifest, url, CHECK_(pd));
874 pd = get_shared_protection_domain(class_loader, index, url, CHECK_(pd));
875 }
876 }
877 return pd;
878 }
879
880 bool SystemDictionaryShared::is_sharing_possible(ClassLoaderData* loader_data) {
881 oop class_loader = loader_data->class_loader();
882 return (class_loader == NULL ||
883 SystemDictionary::is_system_class_loader(class_loader) ||
884 SystemDictionary::is_platform_class_loader(class_loader));
885 }
886
887 // Currently AppCDS only archives classes from the run-time image, the
888 // -Xbootclasspath/a path, the class path, and the module path.
889 //
890 // Check if a shared class can be loaded by the specific classloader. Following
891 // are the "visible" archived classes for different classloaders.
892 //
893 // NULL classloader:
894 // - see SystemDictionary::is_shared_class_visible()
895 // Platform classloader:
896 // - Module class from runtime image. ModuleEntry must be defined in the
897 // classloader.
898 // App classloader:
899 // - Module Class from runtime image and module path. ModuleEntry must be defined in the
900 // classloader.
901 // - Class from -cp. The class must have no PackageEntry defined in any of the
902 // boot/platform/app classloader, or must be in the unnamed module defined in the
903 // AppClassLoader.
904 bool SystemDictionaryShared::is_shared_class_visible_for_classloader(
905 InstanceKlass* ik,
906 Handle class_loader,
907 Symbol* pkg_name,
908 PackageEntry* pkg_entry,
909 ModuleEntry* mod_entry,
910 TRAPS) {
911 assert(class_loader.not_null(), "Class loader should not be NULL");
912 assert(Universe::is_module_initialized(), "Module system is not initialized");
913 ResourceMark rm(THREAD);
914
915 int path_index = ik->shared_classpath_index();
916 SharedClassPathEntry* ent =
917 (SharedClassPathEntry*)FileMapInfo::shared_path(path_index);
918
919 if (SystemDictionary::is_platform_class_loader(class_loader())) {
920 assert(ent != NULL, "shared class for PlatformClassLoader should have valid SharedClassPathEntry");
921 // The PlatformClassLoader can only load archived class originated from the
922 // run-time image. The class' PackageEntry/ModuleEntry must be
923 // defined by the PlatformClassLoader.
924 if (mod_entry != NULL) {
925 // PackageEntry/ModuleEntry is found in the classloader. Check if the
926 // ModuleEntry's location agrees with the archived class' origination.
927 if (ent->is_modules_image() && mod_entry->location()->starts_with("jrt:")) {
928 return true; // Module class from the runtime image
929 }
930 }
931 } else if (SystemDictionary::is_system_class_loader(class_loader())) {
932 assert(ent != NULL, "shared class for system loader should have valid SharedClassPathEntry");
933 if (pkg_name == NULL) {
934 // The archived class is in the unnamed package. Currently, the boot image
935 // does not contain any class in the unnamed package.
936 assert(!ent->is_modules_image(), "Class in the unnamed package must be from the classpath");
937 if (path_index >= ClassLoaderExt::app_class_paths_start_index()) {
938 assert(path_index < ClassLoaderExt::app_module_paths_start_index(), "invalid path_index");
939 return true;
940 }
941 } else {
942 // Check if this is from a PackageEntry/ModuleEntry defined in the AppClassloader.
943 if (pkg_entry == NULL) {
944 // It's not guaranteed that the class is from the classpath if the
945 // PackageEntry cannot be found from the AppClassloader. Need to check
946 // the boot and platform classloader as well.
947 ClassLoaderData* platform_loader_data =
948 ClassLoaderData::class_loader_data_or_null(SystemDictionary::java_platform_loader()); // can be NULL during bootstrap
949 if ((platform_loader_data == NULL ||
950 ClassLoader::get_package_entry(pkg_name, platform_loader_data) == NULL) &&
951 ClassLoader::get_package_entry(pkg_name, ClassLoaderData::the_null_class_loader_data()) == NULL) {
952 // The PackageEntry is not defined in any of the boot/platform/app classloaders.
953 // The archived class must from -cp path and not from the runtime image.
954 if (!ent->is_modules_image() && path_index >= ClassLoaderExt::app_class_paths_start_index() &&
955 path_index < ClassLoaderExt::app_module_paths_start_index()) {
956 return true;
957 }
958 }
959 } else if (mod_entry != NULL) {
960 // The package/module is defined in the AppClassLoader. We support
961 // archiving application module class from the runtime image or from
962 // a named module from a module path.
963 // Packages from the -cp path are in the unnamed_module.
964 if (ent->is_modules_image() && mod_entry->location()->starts_with("jrt:")) {
965 // shared module class from runtime image
966 return true;
967 } else if (pkg_entry->in_unnamed_module() && path_index >= ClassLoaderExt::app_class_paths_start_index() &&
968 path_index < ClassLoaderExt::app_module_paths_start_index()) {
969 // shared class from -cp
970 DEBUG_ONLY( \
971 ClassLoaderData* loader_data = class_loader_data(class_loader); \
972 assert(mod_entry == loader_data->unnamed_module(), "the unnamed module is not defined in the classloader");)
973 return true;
974 } else {
975 if(!pkg_entry->in_unnamed_module() &&
976 (path_index >= ClassLoaderExt::app_module_paths_start_index())&&
977 (path_index < FileMapInfo::get_number_of_shared_paths()) &&
978 (strcmp(ent->name(), ClassLoader::skip_uri_protocol(mod_entry->location()->as_C_string())) == 0)) {
979 // shared module class from module path
980 return true;
981 } else {
982 assert(path_index < FileMapInfo::get_number_of_shared_paths(), "invalid path_index");
983 }
984 }
985 }
986 }
987 } else {
988 // TEMP: if a shared class can be found by a custom loader, consider it visible now.
989 // FIXME: is this actually correct?
990 return true;
991 }
992 return false;
993 }
994
995 bool SystemDictionaryShared::has_platform_or_app_classes() {
996 if (FileMapInfo::current_info()->has_platform_or_app_classes()) {
997 return true;
998 }
999 if (DynamicArchive::is_mapped() &&
1000 FileMapInfo::dynamic_info()->has_platform_or_app_classes()) {
1001 return true;
1002 }
1003 return false;
1004 }
1005
1006 // The following stack shows how this code is reached:
1007 //
1008 // [0] SystemDictionaryShared::find_or_load_shared_class()
1009 // [1] JVM_FindLoadedClass
1010 // [2] java.lang.ClassLoader.findLoadedClass0()
1011 // [3] java.lang.ClassLoader.findLoadedClass()
1012 // [4] jdk.internal.loader.BuiltinClassLoader.loadClassOrNull()
1013 // [5] jdk.internal.loader.BuiltinClassLoader.loadClass()
1014 // [6] jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(), or
1015 // jdk.internal.loader.ClassLoaders$PlatformClassLoader.loadClass()
1016 //
1017 // AppCDS supports fast class loading for these 2 built-in class loaders:
1018 // jdk.internal.loader.ClassLoaders$PlatformClassLoader
1019 // jdk.internal.loader.ClassLoaders$AppClassLoader
1020 // with the following assumptions (based on the JDK core library source code):
1021 //
1022 // [a] these two loaders use the BuiltinClassLoader.loadClassOrNull() to
1023 // load the named class.
1024 // [b] BuiltinClassLoader.loadClassOrNull() first calls findLoadedClass(name).
1025 // [c] At this point, if we can find the named class inside the
1026 // shared_dictionary, we can perform further checks (see
1027 // is_shared_class_visible_for_classloader() to ensure that this class
1028 // was loaded by the same class loader during dump time.
1029 //
1030 // Given these assumptions, we intercept the findLoadedClass() call to invoke
1031 // SystemDictionaryShared::find_or_load_shared_class() to load the shared class from
1032 // the archive for the 2 built-in class loaders. This way,
1033 // we can improve start-up because we avoid decoding the classfile,
1034 // and avoid delegating to the parent loader.
1035 //
1036 // NOTE: there's a lot of assumption about the Java code. If any of that change, this
1037 // needs to be redesigned.
1038
1039 InstanceKlass* SystemDictionaryShared::find_or_load_shared_class(
1040 Symbol* name, Handle class_loader, TRAPS) {
1041 InstanceKlass* k = NULL;
1042 if (UseSharedSpaces) {
1043 if (!has_platform_or_app_classes()) {
1044 return NULL;
1045 }
1046
1047 if (SystemDictionary::is_system_class_loader(class_loader()) ||
1048 SystemDictionary::is_platform_class_loader(class_loader())) {
1049 // Fix for 4474172; see evaluation for more details
1050 class_loader = Handle(
1051 THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
1052 ClassLoaderData *loader_data = register_loader(class_loader);
1053 Dictionary* dictionary = loader_data->dictionary();
1054
1055 unsigned int d_hash = dictionary->compute_hash(name);
1056
1057 bool DoObjectLock = true;
1058 if (is_parallelCapable(class_loader)) {
1059 DoObjectLock = false;
1060 }
1061
1062 // Make sure we are synchronized on the class loader before we proceed
1063 //
1064 // Note: currently, find_or_load_shared_class is called only from
1065 // JVM_FindLoadedClass and used for PlatformClassLoader and AppClassLoader,
1066 // which are parallel-capable loaders, so this lock is NOT taken.
1067 Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
1068 check_loader_lock_contention(lockObject, THREAD);
1069 ObjectLocker ol(lockObject, THREAD, DoObjectLock);
1070
1071 {
1072 MutexLocker mu(THREAD, SystemDictionary_lock);
1073 InstanceKlass* check = find_class(d_hash, name, dictionary);
1074 if (check != NULL) {
1075 return check;
1076 }
1077 }
1078
1079 k = load_shared_class_for_builtin_loader(name, class_loader, THREAD);
1080 if (k != NULL) {
1081 define_instance_class(k, CHECK_NULL);
1082 }
1083 }
1084 }
1085 return k;
1086 }
1087
1088 PackageEntry* SystemDictionaryShared::get_package_entry_from_class_name(Handle class_loader, Symbol* class_name) {
1089 PackageEntry* pkg_entry = NULL;
1090 TempNewSymbol pkg_name = ClassLoader::package_from_class_name(class_name);
1091 if (pkg_name != NULL) {
1092 pkg_entry = class_loader_data(class_loader)->packages()->lookup_only(pkg_name);
1093 }
1094 return pkg_entry;
1095 }
1096
1097 InstanceKlass* SystemDictionaryShared::load_shared_class_for_builtin_loader(
1098 Symbol* class_name, Handle class_loader, TRAPS) {
1099 assert(UseSharedSpaces, "must be");
1100 InstanceKlass* ik = find_builtin_class(class_name);
1101
1102 if (ik != NULL) {
1103 if ((ik->is_shared_app_class() &&
1104 SystemDictionary::is_system_class_loader(class_loader())) ||
1105 (ik->is_shared_platform_class() &&
1106 SystemDictionary::is_platform_class_loader(class_loader()))) {
1107 PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, class_name);
1108 Handle protection_domain =
1109 SystemDictionaryShared::init_security_info(class_loader, ik, pkg_entry, CHECK_NULL);
1110 return load_shared_class(ik, class_loader, protection_domain, NULL, pkg_entry, THREAD);
1111 }
1112 }
1113 return NULL;
1114 }
1115
1116 void SystemDictionaryShared::oops_do(OopClosure* f) {
1117 f->do_oop((oop*)&_shared_protection_domains);
1118 f->do_oop((oop*)&_shared_jar_urls);
1119 f->do_oop((oop*)&_shared_jar_manifests);
1120 }
1121
1122 void SystemDictionaryShared::allocate_shared_protection_domain_array(int size, TRAPS) {
1123 if (_shared_protection_domains == NULL) {
1124 _shared_protection_domains = oopFactory::new_objArray(
1125 SystemDictionary::ProtectionDomain_klass(), size, CHECK);
1126 }
1127 }
1128
1129 void SystemDictionaryShared::allocate_shared_jar_url_array(int size, TRAPS) {
1130 if (_shared_jar_urls == NULL) {
1131 _shared_jar_urls = oopFactory::new_objArray(
1132 SystemDictionary::URL_klass(), size, CHECK);
1133 }
1134 }
1135
1136 void SystemDictionaryShared::allocate_shared_jar_manifest_array(int size, TRAPS) {
1137 if (_shared_jar_manifests == NULL) {
1138 _shared_jar_manifests = oopFactory::new_objArray(
1139 SystemDictionary::Jar_Manifest_klass(), size, CHECK);
1140 }
1141 }
1142
1143 void SystemDictionaryShared::allocate_shared_data_arrays(int size, TRAPS) {
1144 allocate_shared_protection_domain_array(size, CHECK);
1145 allocate_shared_jar_url_array(size, CHECK);
1146 allocate_shared_jar_manifest_array(size, CHECK);
1147 }
1148
1149 // This function is called for loading only UNREGISTERED classes
1150 InstanceKlass* SystemDictionaryShared::lookup_from_stream(Symbol* class_name,
1151 Handle class_loader,
1152 Handle protection_domain,
1153 const ClassFileStream* cfs,
1154 TRAPS) {
1155 if (!UseSharedSpaces) {
1156 return NULL;
1157 }
1158 if (class_name == NULL) { // don't do this for hidden and unsafe anonymous classes
1159 return NULL;
1160 }
1161 if (class_loader.is_null() ||
1162 SystemDictionary::is_system_class_loader(class_loader()) ||
1163 SystemDictionary::is_platform_class_loader(class_loader())) {
1164 // Do nothing for the BUILTIN loaders.
1165 return NULL;
1166 }
1167
1168 const RunTimeSharedClassInfo* record = find_record(&_unregistered_dictionary, &_dynamic_unregistered_dictionary, class_name);
1169 if (record == NULL) {
1170 return NULL;
1171 }
1172
1173 int clsfile_size = cfs->length();
1174 int clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
1175
1176 if (!record->matches(clsfile_size, clsfile_crc32)) {
1177 return NULL;
1178 }
1179
1180 return acquire_class_for_current_thread(record->_klass, class_loader,
1181 protection_domain, cfs,
1182 THREAD);
1183 }
1184
1185 InstanceKlass* SystemDictionaryShared::acquire_class_for_current_thread(
1186 InstanceKlass *ik,
1187 Handle class_loader,
1188 Handle protection_domain,
1189 const ClassFileStream *cfs,
1190 TRAPS) {
1191 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
1192
1193 {
1194 MutexLocker mu(THREAD, SharedDictionary_lock);
1195 if (ik->class_loader_data() != NULL) {
1196 // ik is already loaded (by this loader or by a different loader)
1197 // or ik is being loaded by a different thread (by this loader or by a different loader)
1198 return NULL;
1199 }
1200
1201 // No other thread has acquired this yet, so give it to *this thread*
1202 ik->set_class_loader_data(loader_data);
1203 }
1204
1205 // No longer holding SharedDictionary_lock
1206 // No need to lock, as <ik> can be held only by a single thread.
1207 loader_data->add_class(ik);
1208
1209 // Get the package entry.
1210 PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, ik->name());
1211
1212 // Load and check super/interfaces, restore unsharable info
1213 InstanceKlass* shared_klass = load_shared_class(ik, class_loader, protection_domain,
1214 cfs, pkg_entry, THREAD);
1215 if (shared_klass == NULL || HAS_PENDING_EXCEPTION) {
1216 // TODO: clean up <ik> so it can be used again
1217 return NULL;
1218 }
1219
1220 return shared_klass;
1221 }
1222
1223 static ResourceHashtable<
1224 Symbol*, bool,
1225 primitive_hash<Symbol*>,
1226 primitive_equals<Symbol*>,
1227 6661, // prime number
1228 ResourceObj::C_HEAP> _loaded_unregistered_classes;
1229
1230 bool SystemDictionaryShared::add_unregistered_class(InstanceKlass* k, TRAPS) {
1231 // We don't allow duplicated unregistered classes of the same name.
1232 assert(DumpSharedSpaces, "only when dumping");
1233 Symbol* name = k->name();
1234 bool created = false;
1235 _loaded_unregistered_classes.put_if_absent(name, true, &created);
1236 if (created) {
1237 MutexLocker mu_r(THREAD, Compile_lock); // add_to_hierarchy asserts this.
1238 SystemDictionary::add_to_hierarchy(k, CHECK_false);
1239 }
1240 return created;
1241 }
1242
1243 // This function is called to resolve the super/interfaces of shared classes for
1244 // non-built-in loaders. E.g., ChildClass in the below example
1245 // where "super:" (and optionally "interface:") have been specified.
1246 //
1247 // java/lang/Object id: 0
1248 // Interface id: 2 super: 0 source: cust.jar
1249 // ChildClass id: 4 super: 0 interfaces: 2 source: cust.jar
1250 InstanceKlass* SystemDictionaryShared::dump_time_resolve_super_or_fail(
1251 Symbol* child_name, Symbol* class_name, Handle class_loader,
1252 Handle protection_domain, bool is_superclass, TRAPS) {
1253
1254 assert(DumpSharedSpaces, "only when dumping");
1255
1256 ClassListParser* parser = ClassListParser::instance();
1257 if (parser == NULL) {
1258 // We're still loading the well-known classes, before the ClassListParser is created.
1259 return NULL;
1260 }
1261 if (child_name->equals(parser->current_class_name())) {
1262 // When this function is called, all the numbered super and interface types
1263 // must have already been loaded. Hence this function is never recursively called.
1264 if (is_superclass) {
1265 return parser->lookup_super_for_current_class(class_name);
1266 } else {
1267 return parser->lookup_interface_for_current_class(class_name);
1268 }
1269 } else {
1270 // The VM is not trying to resolve a super type of parser->current_class_name().
1271 // Instead, it's resolving an error class (because parser->current_class_name() has
1272 // failed parsing or verification). Don't do anything here.
1273 return NULL;
1274 }
1275 }
1276
1277 DumpTimeSharedClassInfo* SystemDictionaryShared::find_or_allocate_info_for(InstanceKlass* k) {
1278 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
1279 if (_dumptime_table == NULL) {
1280 _dumptime_table = new (ResourceObj::C_HEAP, mtClass)DumpTimeSharedClassTable();
1281 }
1282 return _dumptime_table->find_or_allocate_info_for(k);
1283 }
1284
1285 void SystemDictionaryShared::set_shared_class_misc_info(InstanceKlass* k, ClassFileStream* cfs) {
1286 Arguments::assert_is_dumping_archive();
1287 assert(!is_builtin(k), "must be unregistered class");
1288 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
1289 info->_clsfile_size = cfs->length();
1290 info->_clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
1291 }
1292
1293 void SystemDictionaryShared::init_dumptime_info(InstanceKlass* k) {
1294 (void)find_or_allocate_info_for(k);
1295 }
1296
1297 void SystemDictionaryShared::remove_dumptime_info(InstanceKlass* k) {
1298 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
1299 DumpTimeSharedClassInfo* p = _dumptime_table->get(k);
1300 if (p == NULL) {
1301 return;
1302 }
1303 if (p->_verifier_constraints != NULL) {
1304 for (int i = 0; i < p->_verifier_constraints->length(); i++) {
1305 DumpTimeSharedClassInfo::DTVerifierConstraint constraint = p->_verifier_constraints->at(i);
1306 if (constraint._name != NULL ) {
1307 constraint._name->decrement_refcount();
1308 }
1309 if (constraint._from_name != NULL ) {
1310 constraint._from_name->decrement_refcount();
1311 }
1312 }
1313 FREE_C_HEAP_ARRAY(DumpTimeSharedClassInfo::DTVerifierConstraint, p->_verifier_constraints);
1314 p->_verifier_constraints = NULL;
1315 FREE_C_HEAP_ARRAY(char, p->_verifier_constraint_flags);
1316 p->_verifier_constraint_flags = NULL;
1317 }
1318 if (p->_loader_constraints != NULL) {
1319 for (int i = 0; i < p->_loader_constraints->length(); i++) {
1320 DumpTimeSharedClassInfo::DTLoaderConstraint ld = p->_loader_constraints->at(i);
1321 if (ld._name != NULL) {
1322 ld._name->decrement_refcount();
1323 }
1324 }
1325 FREE_C_HEAP_ARRAY(DumpTimeSharedClassInfo::DTLoaderConstraint, p->_loader_constraints);
1326 p->_loader_constraints = NULL;
1327 }
1328 _dumptime_table->remove(k);
1329 }
1330
1331 bool SystemDictionaryShared::is_jfr_event_class(InstanceKlass *k) {
1332 while (k) {
1333 if (k->name()->equals("jdk/internal/event/Event")) {
1334 return true;
1335 }
1336 k = k->java_super();
1337 }
1338 return false;
1339 }
1340
1341 bool SystemDictionaryShared::is_registered_lambda_proxy_class(InstanceKlass* ik) {
1342 DumpTimeSharedClassInfo* info = _dumptime_table->get(ik);
1343 return (info != NULL) ? info->_is_archived_lambda_proxy && !ik->is_non_strong_hidden() : false;
1344 }
1345
1346 bool SystemDictionaryShared::is_in_shared_lambda_proxy_table(InstanceKlass* ik) {
1347 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1348 RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(ik);
1349 if (record != NULL && record->nest_host() != NULL) {
1350 return true;
1351 } else {
1352 return false;
1353 }
1354 }
1355
1356 bool SystemDictionaryShared::is_hidden_lambda_proxy(InstanceKlass* ik) {
1357 assert(ik->is_shared(), "applicable to only a shared class");
1358 if (ik->is_hidden()) {
1359 assert(is_in_shared_lambda_proxy_table(ik), "we don't archive other hidden classes");
1360 return true;
1361 } else {
1362 return false;
1363 }
1364 }
1365
1366 void SystemDictionaryShared::warn_excluded(InstanceKlass* k, const char* reason) {
1367 ResourceMark rm;
1368 log_warning(cds)("Skipping %s: %s", k->name()->as_C_string(), reason);
1369 }
1370
1371 bool SystemDictionaryShared::should_be_excluded(InstanceKlass* k) {
1372
1373 if (k->is_unsafe_anonymous()) {
1374 warn_excluded(k, "Unsafe anonymous class");
1375 return true; // unsafe anonymous classes are not archived, skip
1376 }
1377
1378 if (k->is_in_error_state()) {
1379 warn_excluded(k, "In error state");
1380 return true;
1381 }
1382 if (k->has_been_redefined()) {
1383 warn_excluded(k, "Has been redefined");
1384 return true;
1385 }
1386 if (!k->is_hidden() && k->shared_classpath_index() < 0 && is_builtin(k)) {
1387 // These are classes loaded from unsupported locations (such as those loaded by JVMTI native
1388 // agent during dump time).
1389 warn_excluded(k, "Unsupported location");
1390 return true;
1391 }
1392 if (k->signers() != NULL) {
1393 // We cannot include signed classes in the archive because the certificates
1394 // used during dump time may be different than those used during
1395 // runtime (due to expiration, etc).
1396 warn_excluded(k, "Signed JAR");
1397 return true;
1398 }
1399 if (is_jfr_event_class(k)) {
1400 // We cannot include JFR event classes because they need runtime-specific
1401 // instrumentation in order to work with -XX:FlightRecorderOptions=retransform=false.
1402 // There are only a small number of these classes, so it's not worthwhile to
1403 // support them and make CDS more complicated.
1404 warn_excluded(k, "JFR event class");
1405 return true;
1406 }
1407 if (k->init_state() < InstanceKlass::linked) {
1408 // In CDS dumping, we will attempt to link all classes. Those that fail to link will
1409 // be recorded in DumpTimeSharedClassInfo.
1410 Arguments::assert_is_dumping_archive();
1411
1412 // TODO -- rethink how this can be handled.
1413 // We should try to link ik, however, we can't do it here because
1414 // 1. We are at VM exit
1415 // 2. linking a class may cause other classes to be loaded, which means
1416 // a custom ClassLoader.loadClass() may be called, at a point where the
1417 // class loader doesn't expect it.
1418 if (has_class_failed_verification(k)) {
1419 warn_excluded(k, "Failed verification");
1420 } else {
1421 warn_excluded(k, "Not linked");
1422 }
1423 return true;
1424 }
1425 if (k->major_version() < 50 /*JAVA_6_VERSION*/) {
1426 ResourceMark rm;
1427 log_warning(cds)("Pre JDK 6 class not supported by CDS: %u.%u %s",
1428 k->major_version(), k->minor_version(), k->name()->as_C_string());
1429 return true;
1430 }
1431
1432 InstanceKlass* super = k->java_super();
1433 if (super != NULL && should_be_excluded(super)) {
1434 ResourceMark rm;
1435 log_warning(cds)("Skipping %s: super class %s is excluded", k->name()->as_C_string(), super->name()->as_C_string());
1436 return true;
1437 }
1438
1439 if (k->is_hidden() && !is_registered_lambda_proxy_class(k)) {
1440 warn_excluded(k, "Hidden class");
1441 return true;
1442 }
1443
1444 Array<InstanceKlass*>* interfaces = k->local_interfaces();
1445 int len = interfaces->length();
1446 for (int i = 0; i < len; i++) {
1447 InstanceKlass* intf = interfaces->at(i);
1448 if (should_be_excluded(intf)) {
1449 log_warning(cds)("Skipping %s: interface %s is excluded", k->name()->as_C_string(), intf->name()->as_C_string());
1450 return true;
1451 }
1452 }
1453
1454 return false;
1455 }
1456
1457 // k is a class before relocating by ArchiveCompactor
1458 void SystemDictionaryShared::validate_before_archiving(InstanceKlass* k) {
1459 ResourceMark rm;
1460 const char* name = k->name()->as_C_string();
1461 DumpTimeSharedClassInfo* info = _dumptime_table->get(k);
1462 assert(_no_class_loading_should_happen, "class loading must be disabled");
1463 guarantee(info != NULL, "Class %s must be entered into _dumptime_table", name);
1464 guarantee(!info->is_excluded(), "Should not attempt to archive excluded class %s", name);
1465 if (is_builtin(k)) {
1466 if (k->is_hidden()) {
1467 assert(is_registered_lambda_proxy_class(k), "unexpected hidden class %s", name);
1468 }
1469 guarantee(!k->is_shared_unregistered_class(),
1470 "Class loader type must be set for BUILTIN class %s", name);
1471
1472 } else {
1473 guarantee(k->is_shared_unregistered_class(),
1474 "Class loader type must not be set for UNREGISTERED class %s", name);
1475 }
1476 }
1477
1478 class ExcludeDumpTimeSharedClasses : StackObj {
1479 public:
1480 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
1481 if (SystemDictionaryShared::should_be_excluded(k)) {
1482 info.set_excluded();
1483 }
1484 return true; // keep on iterating
1485 }
1486 };
1487
1488 void SystemDictionaryShared::check_excluded_classes() {
1489 ExcludeDumpTimeSharedClasses excl;
1490 _dumptime_table->iterate(&excl);
1491 _dumptime_table->update_counts();
1492 }
1493
1494 bool SystemDictionaryShared::is_excluded_class(InstanceKlass* k) {
1495 assert(_no_class_loading_should_happen, "sanity");
1496 Arguments::assert_is_dumping_archive();
1497 return find_or_allocate_info_for(k)->is_excluded();
1498 }
1499
1500 void SystemDictionaryShared::set_class_has_failed_verification(InstanceKlass* ik) {
1501 Arguments::assert_is_dumping_archive();
1502 find_or_allocate_info_for(ik)->set_failed_verification();
1503 }
1504
1505 bool SystemDictionaryShared::has_class_failed_verification(InstanceKlass* ik) {
1506 Arguments::assert_is_dumping_archive();
1507 if (_dumptime_table == NULL) {
1508 assert(DynamicDumpSharedSpaces, "sanity");
1509 assert(ik->is_shared(), "must be a shared class in the static archive");
1510 return false;
1511 }
1512 DumpTimeSharedClassInfo* p = _dumptime_table->get(ik);
1513 return (p == NULL) ? false : p->failed_verification();
1514 }
1515
1516 class IterateDumpTimeSharedClassTable : StackObj {
1517 MetaspaceClosure *_it;
1518 public:
1519 IterateDumpTimeSharedClassTable(MetaspaceClosure* it) : _it(it) {}
1520
1521 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
1522 if (!info.is_excluded()) {
1523 info.metaspace_pointers_do(_it);
1524 }
1525 return true; // keep on iterating
1526 }
1527 };
1528
1529 void SystemDictionaryShared::dumptime_classes_do(class MetaspaceClosure* it) {
1530 IterateDumpTimeSharedClassTable iter(it);
1531 _dumptime_table->iterate(&iter);
1532 }
1533
1534 bool SystemDictionaryShared::add_verification_constraint(InstanceKlass* k, Symbol* name,
1535 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
1536 Arguments::assert_is_dumping_archive();
1537 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
1538 info->add_verification_constraint(k, name, from_name, from_field_is_protected,
1539 from_is_array, from_is_object);
1540
1541 if (DynamicDumpSharedSpaces) {
1542 // For dynamic dumping, we can resolve all the constraint classes for all class loaders during
1543 // the initial run prior to creating the archive before vm exit. We will also perform verification
1544 // check when running with the archive.
1545 return false;
1546 } else {
1547 if (is_builtin(k)) {
1548 // For builtin class loaders, we can try to complete the verification check at dump time,
1549 // because we can resolve all the constraint classes. We will also perform verification check
1550 // when running with the archive.
1551 return false;
1552 } else {
1553 // For non-builtin class loaders, we cannot complete the verification check at dump time,
1554 // because at dump time we don't know how to resolve classes for such loaders.
1555 return true;
1556 }
1557 }
1558 }
1559
1560 void DumpTimeSharedClassInfo::add_verification_constraint(InstanceKlass* k, Symbol* name,
1561 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
1562 if (_verifier_constraints == NULL) {
1563 _verifier_constraints = new(ResourceObj::C_HEAP, mtClass) GrowableArray<DTVerifierConstraint>(4, true, mtClass);
1564 }
1565 if (_verifier_constraint_flags == NULL) {
1566 _verifier_constraint_flags = new(ResourceObj::C_HEAP, mtClass) GrowableArray<char>(4, true, mtClass);
1567 }
1568 GrowableArray<DTVerifierConstraint>* vc_array = _verifier_constraints;
1569 for (int i = 0; i < vc_array->length(); i++) {
1570 DTVerifierConstraint* p = vc_array->adr_at(i);
1571 if (name == p->_name && from_name == p->_from_name) {
1572 return;
1573 }
1574 }
1575 DTVerifierConstraint cons(name, from_name);
1576 vc_array->append(cons);
1577
1578 GrowableArray<char>* vcflags_array = _verifier_constraint_flags;
1579 char c = 0;
1580 c |= from_field_is_protected ? SystemDictionaryShared::FROM_FIELD_IS_PROTECTED : 0;
1581 c |= from_is_array ? SystemDictionaryShared::FROM_IS_ARRAY : 0;
1582 c |= from_is_object ? SystemDictionaryShared::FROM_IS_OBJECT : 0;
1583 vcflags_array->append(c);
1584
1585 if (log_is_enabled(Trace, cds, verification)) {
1586 ResourceMark rm;
1587 log_trace(cds, verification)("add_verification_constraint: %s: %s must be subclass of %s [0x%x] array len %d flags len %d",
1588 k->external_name(), from_name->as_klass_external_name(),
1589 name->as_klass_external_name(), c, vc_array->length(), vcflags_array->length());
1590 }
1591 }
1592
1593 void SystemDictionaryShared::add_lambda_proxy_class(InstanceKlass* caller_ik,
1594 InstanceKlass* lambda_ik,
1595 Symbol* invoked_name,
1596 Symbol* invoked_type,
1597 Symbol* method_type,
1598 Method* member_method,
1599 Symbol* instantiated_method_type) {
1600
1601 assert(caller_ik->class_loader() == lambda_ik->class_loader(), "mismatched class loader");
1602 assert(caller_ik->class_loader_data() == lambda_ik->class_loader_data(), "mismatched class loader data");
1603
1604 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
1605
1606 lambda_ik->assign_class_loader_type();
1607
1608 DumpTimeSharedClassInfo* info = _dumptime_table->get(lambda_ik);
1609 if (info != NULL) {
1610 // Set _is_archived_lambda_proxy in DumpTimeSharedClassInfo so that the lambda_ik
1611 // won't be excluded during dumping of shared archive. See ExcludeDumpTimeSharedClasses.
1612 info->_is_archived_lambda_proxy = true;
1613 }
1614
1615 LambdaProxyClassKey key(caller_ik,
1616 invoked_name,
1617 invoked_type,
1618 method_type,
1619 member_method,
1620 instantiated_method_type);
1621 add_to_dump_time_lambda_proxy_class_dictionary(key, lambda_ik);
1622 }
1623
1624 InstanceKlass* SystemDictionaryShared::get_shared_lambda_proxy_class(InstanceKlass* caller_ik,
1625 Symbol* invoked_name,
1626 Symbol* invoked_type,
1627 Symbol* method_type,
1628 Method* member_method,
1629 Symbol* instantiated_method_type) {
1630 MutexLocker ml(CDSLambda_lock, Mutex::_no_safepoint_check_flag);
1631 LambdaProxyClassKey key(caller_ik, invoked_name, invoked_type,
1632 method_type, member_method, instantiated_method_type);
1633 const RunTimeLambdaProxyClassInfo* info = _lambda_proxy_class_dictionary.lookup(&key, key.hash(), 0);
1634 InstanceKlass* proxy_klass = NULL;
1635 if (info != NULL) {
1636 InstanceKlass* curr_klass = info->proxy_klass();
1637 InstanceKlass* prev_klass = curr_klass;
1638 if (curr_klass->lambda_proxy_is_available()) {
1639 while (curr_klass->next_link() != NULL) {
1640 prev_klass = curr_klass;
1641 curr_klass = InstanceKlass::cast(curr_klass->next_link());
1642 }
1643 assert(curr_klass->is_hidden(), "must be");
1644 assert(curr_klass->lambda_proxy_is_available(), "must be");
1645
1646 prev_klass->set_next_link(NULL);
1647 proxy_klass = curr_klass;
1648 proxy_klass->clear_lambda_proxy_is_available();
1649 if (log_is_enabled(Debug, cds)) {
1650 ResourceMark rm;
1651 log_debug(cds)("Loaded lambda proxy: %s", proxy_klass->external_name());
1652 }
1653 } else {
1654 if (log_is_enabled(Debug, cds)) {
1655 ResourceMark rm;
1656 log_debug(cds)("Used all archived lambda proxy classes for: %s %s%s",
1657 caller_ik->external_name(), invoked_name->as_C_string(), invoked_type->as_C_string());
1658 }
1659 }
1660 }
1661 return proxy_klass;
1662 }
1663
1664 InstanceKlass* SystemDictionaryShared::get_shared_nest_host(InstanceKlass* lambda_ik) {
1665 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1666 RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(lambda_ik);
1667 return record->nest_host();
1668 }
1669
1670 InstanceKlass* SystemDictionaryShared::load_shared_lambda_proxy_class(InstanceKlass* lambda_ik,
1671 InstanceKlass* caller_ik,
1672 bool initialize, TRAPS) {
1673 Handle class_loader(THREAD, caller_ik->class_loader());
1674 Handle protection_domain;
1675 PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, caller_ik->name());
1676 if (caller_ik->class_loader() != NULL) {
1677 protection_domain = SystemDictionaryShared::init_security_info(class_loader, caller_ik, pkg_entry, CHECK_NULL);
1678 }
1679
1680 InstanceKlass* shared_nest_host = get_shared_nest_host(lambda_ik);
1681 assert(shared_nest_host != NULL, "unexpected NULL _nest_host");
1682
1683 InstanceKlass* loaded_lambda =
1684 SystemDictionary::load_shared_lambda_proxy_class(lambda_ik, class_loader, protection_domain, pkg_entry, initialize, CHECK_NULL);
1685
1686 InstanceKlass* nest_host = caller_ik->nest_host(THREAD);
1687 // The following ensures that the caller's nest host is the same as the lambda proxy's
1688 // nest host recorded at dump time.
1689 assert(nest_host->has_nest_member(caller_ik, THREAD) ||
1690 nest_host == caller_ik, "caller_ik failed nest member check");
1691 assert(nest_host == shared_nest_host, "mismatched nest host");
1692
1693 return loaded_lambda;
1694 }
1695
1696 static char get_loader_type_by(oop loader) {
1697 assert(SystemDictionary::is_builtin_class_loader(loader), "Must be built-in loader");
1698 if (SystemDictionary::is_boot_class_loader(loader)) {
1699 return (char)ClassLoader::BOOT_LOADER;
1700 } else if (SystemDictionary::is_platform_class_loader(loader)) {
1701 return (char)ClassLoader::PLATFORM_LOADER;
1702 } else {
1703 assert(SystemDictionary::is_system_class_loader(loader), "Class loader mismatch");
1704 return (char)ClassLoader::APP_LOADER;
1705 }
1706 }
1707
1708 static oop get_class_loader_by(char type) {
1709 if (type == (char)ClassLoader::BOOT_LOADER) {
1710 return (oop)NULL;
1711 } else if (type == (char)ClassLoader::PLATFORM_LOADER) {
1712 return SystemDictionary::java_platform_loader();
1713 } else {
1714 assert (type == (char)ClassLoader::APP_LOADER, "Sanity");
1715 return SystemDictionary::java_system_loader();
1716 }
1717 }
1718
1719 void DumpTimeSharedClassInfo::record_linking_constraint(Symbol* name, Handle loader1, Handle loader2) {
1720 assert(loader1 != loader2, "sanity");
1721 LogTarget(Info, class, loader, constraints) log;
1722 if (_loader_constraints == NULL) {
1723 _loader_constraints = new (ResourceObj::C_HEAP, mtClass) GrowableArray<DTLoaderConstraint>(4, true, mtClass);
1724 }
1725 char lt1 = get_loader_type_by(loader1());
1726 char lt2 = get_loader_type_by(loader2());
1727 DTLoaderConstraint lc(name, lt1, lt2);
1728 for (int i = 0; i < _loader_constraints->length(); i++) {
1729 DTLoaderConstraint dt = _loader_constraints->at(i);
1730 if (lc.equals(dt)) {
1731 if (log.is_enabled()) {
1732 ResourceMark rm;
1733 // Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
1734 log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s already added]",
1735 _klass->external_name(), name->as_C_string(),
1736 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1737 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
1738 }
1739 return;
1740 }
1741 }
1742 _loader_constraints->append(lc);
1743 if (log.is_enabled()) {
1744 ResourceMark rm;
1745 // Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
1746 log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s total %d]",
1747 _klass->external_name(), name->as_C_string(),
1748 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1749 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id(),
1750 _loader_constraints->length());
1751 }
1752 }
1753
1754 void SystemDictionaryShared::check_verification_constraints(InstanceKlass* klass,
1755 TRAPS) {
1756 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1757 RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(klass);
1758
1759 int length = record->_num_verifier_constraints;
1760 if (length > 0) {
1761 for (int i = 0; i < length; i++) {
1762 RunTimeSharedClassInfo::RTVerifierConstraint* vc = record->verifier_constraint_at(i);
1763 Symbol* name = vc->name();
1764 Symbol* from_name = vc->from_name();
1765 char c = record->verifier_constraint_flag(i);
1766
1767 if (log_is_enabled(Trace, cds, verification)) {
1768 ResourceMark rm(THREAD);
1769 log_trace(cds, verification)("check_verification_constraint: %s: %s must be subclass of %s [0x%x]",
1770 klass->external_name(), from_name->as_klass_external_name(),
1771 name->as_klass_external_name(), c);
1772 }
1773
1774 bool from_field_is_protected = (c & SystemDictionaryShared::FROM_FIELD_IS_PROTECTED) ? true : false;
1775 bool from_is_array = (c & SystemDictionaryShared::FROM_IS_ARRAY) ? true : false;
1776 bool from_is_object = (c & SystemDictionaryShared::FROM_IS_OBJECT) ? true : false;
1777
1778 bool ok = VerificationType::resolve_and_check_assignability(klass, name,
1779 from_name, from_field_is_protected, from_is_array, from_is_object, CHECK);
1780 if (!ok) {
1781 ResourceMark rm(THREAD);
1782 stringStream ss;
1783
1784 ss.print_cr("Bad type on operand stack");
1785 ss.print_cr("Exception Details:");
1786 ss.print_cr(" Location:\n %s", klass->name()->as_C_string());
1787 ss.print_cr(" Reason:\n Type '%s' is not assignable to '%s'",
1788 from_name->as_quoted_ascii(), name->as_quoted_ascii());
1789 THROW_MSG(vmSymbols::java_lang_VerifyError(), ss.as_string());
1790 }
1791 }
1792 }
1793 }
1794
1795 // Record class loader constraints that are checked inside
1796 // InstanceKlass::link_class(), so that these can be checked quickly
1797 // at runtime without laying out the vtable/itables.
1798 void SystemDictionaryShared::record_linking_constraint(Symbol* name, InstanceKlass* klass,
1799 Handle loader1, Handle loader2, TRAPS) {
1800 // A linking constraint check is executed when:
1801 // - klass extends or implements type S
1802 // - klass overrides method S.M(...) with X.M
1803 // - If klass defines the method M, X is
1804 // the same as klass.
1805 // - If klass does not define the method M,
1806 // X must be a supertype of klass and X.M is
1807 // a default method defined by X.
1808 // - loader1 = X->class_loader()
1809 // - loader2 = S->class_loader()
1810 // - loader1 != loader2
1811 // - M's paramater(s) include an object type T
1812 // We require that
1813 // - whenever loader1 and loader2 try to
1814 // resolve the type T, they must always resolve to
1815 // the same InstanceKlass.
1816 // NOTE: type T may or may not be currently resolved in
1817 // either of these two loaders. The check itself does not
1818 // try to resolve T.
1819 oop klass_loader = klass->class_loader();
1820 assert(klass_loader != NULL, "should not be called for boot loader");
1821 assert(loader1 != loader2, "must be");
1822
1823 if (!is_system_class_loader(klass_loader) &&
1824 !is_platform_class_loader(klass_loader)) {
1825 // If klass is loaded by system/platform loaders, we can
1826 // guarantee that klass and S must be loaded by the same
1827 // respective loader between dump time and run time, and
1828 // the exact same check on (name, loader1, loader2) will
1829 // be executed. Hence, we can cache this check and execute
1830 // it at runtime without walking the vtable/itables.
1831 //
1832 // This cannot be guaranteed for classes loaded by other
1833 // loaders, so we bail.
1834 return;
1835 }
1836
1837 if (THREAD->is_VM_thread()) {
1838 assert(DynamicDumpSharedSpaces, "must be");
1839 // We are re-laying out the vtable/itables of the *copy* of
1840 // a class during the final stage of dynamic dumping. The
1841 // linking constraints for this class has already been recorded.
1842 return;
1843 }
1844 Arguments::assert_is_dumping_archive();
1845 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(klass);
1846 info->record_linking_constraint(name, loader1, loader2);
1847 }
1848
1849 // returns true IFF there's no need to re-initialize the i/v-tables for klass for
1850 // the purpose of checking class loader constraints.
1851 bool SystemDictionaryShared::check_linking_constraints(InstanceKlass* klass, TRAPS) {
1852 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1853 LogTarget(Info, class, loader, constraints) log;
1854 if (klass->is_shared_boot_class()) {
1855 // No class loader constraint check performed for boot classes.
1856 return true;
1857 }
1858 if (klass->is_shared_platform_class() || klass->is_shared_app_class()) {
1859 RunTimeSharedClassInfo* info = RunTimeSharedClassInfo::get_for(klass);
1860 assert(info != NULL, "Sanity");
1861 if (info->_num_loader_constraints > 0) {
1862 HandleMark hm;
1863 for (int i = 0; i < info->_num_loader_constraints; i++) {
1864 RunTimeSharedClassInfo::RTLoaderConstraint* lc = info->loader_constraint_at(i);
1865 Symbol* name = lc->constraint_name();
1866 Handle loader1(THREAD, get_class_loader_by(lc->_loader_type1));
1867 Handle loader2(THREAD, get_class_loader_by(lc->_loader_type2));
1868 if (log.is_enabled()) {
1869 ResourceMark rm(THREAD);
1870 log.print("[CDS add loader constraint for class %s symbol %s loader[0] %s loader[1] %s",
1871 klass->external_name(), name->as_C_string(),
1872 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1873 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
1874 }
1875 if (!SystemDictionary::add_loader_constraint(name, klass, loader1, loader2, THREAD)) {
1876 // Loader constraint violation has been found. The caller
1877 // will re-layout the vtable/itables to produce the correct
1878 // exception.
1879 if (log.is_enabled()) {
1880 log.print(" failed]");
1881 }
1882 return false;
1883 }
1884 if (log.is_enabled()) {
1885 log.print(" succeeded]");
1886 }
1887 }
1888 return true; // for all recorded constraints added successully.
1889 }
1890 }
1891 if (log.is_enabled()) {
1892 ResourceMark rm(THREAD);
1893 log.print("[CDS has not recorded loader constraint for class %s]", klass->external_name());
1894 }
1895 return false;
1896 }
1897
1898 class EstimateSizeForArchive : StackObj {
1899 size_t _shared_class_info_size;
1900 int _num_builtin_klasses;
1901 int _num_unregistered_klasses;
1902
1903 public:
1904 EstimateSizeForArchive() {
1905 _shared_class_info_size = 0;
1906 _num_builtin_klasses = 0;
1907 _num_unregistered_klasses = 0;
1908 }
1909
1910 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
1911 if (!info.is_excluded()) {
1912 size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
1913 _shared_class_info_size += align_up(byte_size, BytesPerWord);
1914 }
1915 return true; // keep on iterating
1916 }
1917
1918 size_t total() {
1919 return _shared_class_info_size;
1920 }
1921 };
1922
1923 size_t SystemDictionaryShared::estimate_size_for_archive() {
1924 EstimateSizeForArchive est;
1925 _dumptime_table->iterate(&est);
1926 size_t total_size = est.total() +
1927 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(true)) +
1928 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(false));
1929 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
1930 total_size +=
1931 (sizeof(RunTimeLambdaProxyClassInfo) * _dumptime_lambda_proxy_class_dictionary->_count) +
1932 CompactHashtableWriter::estimate_size(_dumptime_lambda_proxy_class_dictionary->_count);
1933 } else {
1934 total_size += CompactHashtableWriter::estimate_size(0);
1935 }
1936 return total_size;
1937 }
1938
1939 class CopyLambdaProxyClassInfoToArchive : StackObj {
1940 CompactHashtableWriter* _writer;
1941 public:
1942 CopyLambdaProxyClassInfoToArchive(CompactHashtableWriter* writer)
1943 : _writer(writer) {}
1944 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1945 if (SystemDictionaryShared::is_excluded_class(info._proxy_klass->at(0))) {
1946 return true;
1947 }
1948 ResourceMark rm;
1949 log_info(cds,dynamic)("Archiving hidden %s", info._proxy_klass->at(0)->external_name());
1950 size_t byte_size = sizeof(RunTimeLambdaProxyClassInfo);
1951 RunTimeLambdaProxyClassInfo* runtime_info =
1952 (RunTimeLambdaProxyClassInfo*)MetaspaceShared::read_only_space_alloc(byte_size);
1953 runtime_info->init(key, info);
1954 unsigned int hash = runtime_info->hash(); // Fields in runtime_info->_key already point to target space.
1955 u4 delta = MetaspaceShared::object_delta_u4(DynamicArchive::buffer_to_target(runtime_info));
1956 _writer->add(hash, delta);
1957 return true;
1958 }
1959 };
1960
1961 class AdjustLambdaProxyClassInfo : StackObj {
1962 public:
1963 AdjustLambdaProxyClassInfo() {}
1964 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1965 if (SystemDictionaryShared::is_excluded_class(info._proxy_klass->at(0))) {
1966 return true;
1967 }
1968 int len = info._proxy_klass->length();
1969 if (len > 1) {
1970 for (int i = 0; i < len-1; i++) {
1971 InstanceKlass* ok0 = info._proxy_klass->at(i+0); // this is original klass
1972 InstanceKlass* ok1 = info._proxy_klass->at(i+1); // this is original klass
1973 InstanceKlass* bk0 = DynamicArchive::original_to_buffer(ok0);
1974 InstanceKlass* bk1 = DynamicArchive::original_to_buffer(ok1);
1975 assert(bk0->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
1976 assert(bk1->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
1977 bk0->set_next_link(bk1);
1978 bk1->set_lambda_proxy_is_available();
1979 ArchivePtrMarker::mark_pointer(bk0->next_link_addr());
1980 }
1981 }
1982 DynamicArchive::original_to_buffer(info._proxy_klass->at(0))->set_lambda_proxy_is_available();
1983 return true;
1984 }
1985 };
1986
1987 class CopySharedClassInfoToArchive : StackObj {
1988 CompactHashtableWriter* _writer;
1989 bool _is_builtin;
1990 public:
1991 CopySharedClassInfoToArchive(CompactHashtableWriter* writer,
1992 bool is_builtin,
1993 bool is_static_archive)
1994 : _writer(writer), _is_builtin(is_builtin) {}
1995
1996 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
1997 if (!info.is_excluded() && info.is_builtin() == _is_builtin) {
1998 size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
1999 RunTimeSharedClassInfo* record;
2000 record = (RunTimeSharedClassInfo*)MetaspaceShared::read_only_space_alloc(byte_size);
2001 record->init(info);
2002
2003 unsigned int hash;
2004 Symbol* name = info._klass->name();
2005 if (DynamicDumpSharedSpaces) {
2006 name = DynamicArchive::original_to_target(name);
2007 }
2008 hash = SystemDictionaryShared::hash_for_shared_dictionary(name);
2009 u4 delta;
2010 if (DynamicDumpSharedSpaces) {
2011 delta = MetaspaceShared::object_delta_u4(DynamicArchive::buffer_to_target(record));
2012 } else {
2013 delta = MetaspaceShared::object_delta_u4(record);
2014 }
2015 if (_is_builtin && info._klass->is_hidden()) {
2016 // skip
2017 } else {
2018 _writer->add(hash, delta);
2019 }
2020 if (log_is_enabled(Trace, cds, hashtables)) {
2021 ResourceMark rm;
2022 log_trace(cds,hashtables)("%s dictionary: %s", (_is_builtin ? "builtin" : "unregistered"), info._klass->external_name());
2023 }
2024
2025 // Save this for quick runtime lookup of InstanceKlass* -> RunTimeSharedClassInfo*
2026 RunTimeSharedClassInfo::set_for(info._klass, record);
2027 }
2028 return true; // keep on iterating
2029 }
2030 };
2031
2032 void SystemDictionaryShared::write_lambda_proxy_class_dictionary(LambdaProxyClassDictionary *dictionary) {
2033 CompactHashtableStats stats;
2034 dictionary->reset();
2035 CompactHashtableWriter writer(_dumptime_lambda_proxy_class_dictionary->_count, &stats);
2036 CopyLambdaProxyClassInfoToArchive copy(&writer);
2037 _dumptime_lambda_proxy_class_dictionary->iterate(©);
2038 writer.dump(dictionary, "lambda proxy class dictionary");
2039 }
2040
2041 void SystemDictionaryShared::write_dictionary(RunTimeSharedDictionary* dictionary,
2042 bool is_builtin,
2043 bool is_static_archive) {
2044 CompactHashtableStats stats;
2045 dictionary->reset();
2046 CompactHashtableWriter writer(_dumptime_table->count_of(is_builtin), &stats);
2047 CopySharedClassInfoToArchive copy(&writer, is_builtin, is_static_archive);
2048 _dumptime_table->iterate(©);
2049 writer.dump(dictionary, is_builtin ? "builtin dictionary" : "unregistered dictionary");
2050 }
2051
2052 void SystemDictionaryShared::write_to_archive(bool is_static_archive) {
2053 if (is_static_archive) {
2054 write_dictionary(&_builtin_dictionary, true);
2055 write_dictionary(&_unregistered_dictionary, false);
2056 } else {
2057 write_dictionary(&_dynamic_builtin_dictionary, true);
2058 write_dictionary(&_dynamic_unregistered_dictionary, false);
2059 }
2060 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
2061 write_lambda_proxy_class_dictionary(&_lambda_proxy_class_dictionary);
2062 }
2063 }
2064
2065 void SystemDictionaryShared::adjust_lambda_proxy_class_dictionary() {
2066 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
2067 AdjustLambdaProxyClassInfo adjuster;
2068 _dumptime_lambda_proxy_class_dictionary->iterate(&adjuster);
2069 }
2070 }
2071
2072 void SystemDictionaryShared::serialize_dictionary_headers(SerializeClosure* soc,
2073 bool is_static_archive) {
2074 if (is_static_archive) {
2075 _builtin_dictionary.serialize_header(soc);
2076 _unregistered_dictionary.serialize_header(soc);
2077 } else {
2078 _dynamic_builtin_dictionary.serialize_header(soc);
2079 _dynamic_unregistered_dictionary.serialize_header(soc);
2080 _lambda_proxy_class_dictionary.serialize_header(soc);
2081 }
2082 }
2083
2084 void SystemDictionaryShared::serialize_well_known_klasses(SerializeClosure* soc) {
2085 for (int i = FIRST_WKID; i < WKID_LIMIT; i++) {
2086 soc->do_ptr((void**)&_well_known_klasses[i]);
2087 }
2088 }
2089
2090 const RunTimeSharedClassInfo*
2091 SystemDictionaryShared::find_record(RunTimeSharedDictionary* static_dict, RunTimeSharedDictionary* dynamic_dict, Symbol* name) {
2092 if (!UseSharedSpaces || !name->is_shared()) {
2093 // The names of all shared classes must also be a shared Symbol.
2094 return NULL;
2095 }
2096
2097 unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary(name);
2098 const RunTimeSharedClassInfo* record = NULL;
2099 if (!MetaspaceShared::is_shared_dynamic(name)) {
2100 // The names of all shared classes in the static dict must also be in the
2101 // static archive
2102 record = static_dict->lookup(name, hash, 0);
2103 }
2104
2105 if (record == NULL && DynamicArchive::is_mapped()) {
2106 record = dynamic_dict->lookup(name, hash, 0);
2107 }
2108
2109 return record;
2110 }
2111
2112 InstanceKlass* SystemDictionaryShared::find_builtin_class(Symbol* name) {
2113 const RunTimeSharedClassInfo* record = find_record(&_builtin_dictionary, &_dynamic_builtin_dictionary, name);
2114 if (record != NULL) {
2115 assert(!record->_klass->is_hidden(), "hidden class cannot be looked up by name");
2116 return record->_klass;
2117 } else {
2118 return NULL;
2119 }
2120 }
2121
2122 void SystemDictionaryShared::update_shared_entry(InstanceKlass* k, int id) {
2123 assert(DumpSharedSpaces, "supported only when dumping");
2124 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
2125 info->_id = id;
2126 }
2127
2128 class SharedDictionaryPrinter : StackObj {
2129 outputStream* _st;
2130 int _index;
2131 public:
2132 SharedDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
2133
2134 void do_value(const RunTimeSharedClassInfo* record) {
2135 ResourceMark rm;
2136 _st->print_cr("%4d: %s", (_index++), record->_klass->external_name());
2137 }
2138 };
2139
2140 class SharedLambdaDictionaryPrinter : StackObj {
2141 outputStream* _st;
2142 int _index;
2143 public:
2144 SharedLambdaDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
2145
2146 void do_value(const RunTimeLambdaProxyClassInfo* record) {
2147 ResourceMark rm;
2148 _st->print_cr("%4d: %s", (_index++), record->proxy_klass()->external_name());
2149 Klass* k = record->proxy_klass()->next_link();
2150 while (k != NULL) {
2151 _st->print_cr("%4d: %s", (_index++), k->external_name());
2152 k = k->next_link();
2153 }
2154 }
2155 };
2156
2157 void SystemDictionaryShared::print_on(outputStream* st) {
2158 if (UseSharedSpaces) {
2159 st->print_cr("Shared Dictionary");
2160 SharedDictionaryPrinter p(st);
2161 _builtin_dictionary.iterate(&p);
2162 _unregistered_dictionary.iterate(&p);
2163 if (DynamicArchive::is_mapped()) {
2164 _dynamic_builtin_dictionary.iterate(&p);
2165 _unregistered_dictionary.iterate(&p);
2166 if (!_lambda_proxy_class_dictionary.empty()) {
2167 st->print_cr("Shared Lambda Dictionary");
2168 SharedLambdaDictionaryPrinter ldp(st);
2169 _lambda_proxy_class_dictionary.iterate(&ldp);
2170 }
2171 }
2172 }
2173 }
2174
2175 void SystemDictionaryShared::print_table_statistics(outputStream* st) {
2176 if (UseSharedSpaces) {
2177 _builtin_dictionary.print_table_statistics(st, "Builtin Shared Dictionary");
2178 _unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
2179 if (DynamicArchive::is_mapped()) {
2180 _dynamic_builtin_dictionary.print_table_statistics(st, "Dynamic Builtin Shared Dictionary");
2181 _dynamic_unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
2182 _lambda_proxy_class_dictionary.print_table_statistics(st, "Lambda Shared Dictionary");
2183 }
2184 }
2185 }
2186
2187 bool SystemDictionaryShared::empty_dumptime_table() {
2188 if (_dumptime_table == NULL) {
2189 return true;
2190 }
2191 _dumptime_table->update_counts();
2192 if (_dumptime_table->count_of(true) == 0 && _dumptime_table->count_of(false) == 0){
2193 return true;
2194 }
2195 return false;
2196 }
2197
2198 #if INCLUDE_CDS_JAVA_HEAP
2199
2200 class ArchivedMirrorPatcher {
2201 static void update(Klass* k) {
2202 if (k->has_raw_archived_mirror()) {
2203 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
2204 if (m != NULL) {
2205 java_lang_Class::update_archived_mirror_native_pointers(m);
2206 }
2207 }
2208 }
2209
2210 public:
2211 static void update_array_klasses(Klass* ak) {
2212 while (ak != NULL) {
2213 update(ak);
2214 ak = ArrayKlass::cast(ak)->higher_dimension();
2215 }
2216 }
2217
2218 void do_value(const RunTimeSharedClassInfo* info) {
2219 InstanceKlass* ik = info->_klass;
2220 update(ik);
2221 update_array_klasses(ik->array_klasses());
2222 }
2223 };
2224
2225 void SystemDictionaryShared::update_archived_mirror_native_pointers_for(RunTimeSharedDictionary* dict) {
2226 ArchivedMirrorPatcher patcher;
2227 dict->iterate(&patcher);
2228 }
2229
2230 void SystemDictionaryShared::update_archived_mirror_native_pointers() {
2231 if (!HeapShared::open_archive_heap_region_mapped()) {
2232 return;
2233 }
2234 if (MetaspaceShared::relocation_delta() == 0) {
2235 return;
2236 }
2237 update_archived_mirror_native_pointers_for(&_builtin_dictionary);
2238 update_archived_mirror_native_pointers_for(&_unregistered_dictionary);
2239
2240 for (int t = T_BOOLEAN; t <= T_LONG; t++) {
2241 Klass* k = Universe::typeArrayKlassObj((BasicType)t);
2242 ArchivedMirrorPatcher::update_array_klasses(k);
2243 }
2244 }
2245 #endif