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 "jfr/jfrEvents.hpp"
40 #include "logging/log.hpp"
41 #include "memory/allocation.hpp"
42 #include "memory/archiveUtils.hpp"
43 #include "memory/dynamicArchive.hpp"
44 #include "memory/filemap.hpp"
45 #include "memory/heapShared.hpp"
46 #include "memory/metadataFactory.hpp"
47 #include "memory/metaspaceClosure.hpp"
48 #include "memory/oopFactory.hpp"
49 #include "memory/resourceArea.hpp"
50 #include "memory/universe.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/typeArrayOop.inline.hpp"
56 #include "runtime/handles.inline.hpp"
57 #include "runtime/java.hpp"
58 #include "runtime/javaCalls.hpp"
59 #include "runtime/mutexLocker.hpp"
60 #include "utilities/hashtable.inline.hpp"
61 #include "utilities/resourceHash.hpp"
62 #include "utilities/stringUtils.hpp"
63
64
65 objArrayOop SystemDictionaryShared::_shared_protection_domains = NULL;
66 objArrayOop SystemDictionaryShared::_shared_jar_urls = NULL;
67 objArrayOop SystemDictionaryShared::_shared_jar_manifests = NULL;
68 DEBUG_ONLY(bool SystemDictionaryShared::_no_class_loading_should_happen = false;)
69
70 class DumpTimeSharedClassInfo: public CHeapObj<mtClass> {
71 bool _excluded;
72 public:
73 struct DTLoaderConstraint {
74 Symbol* _name;
75 char _loader_type1;
76 char _loader_type2;
77 DTLoaderConstraint(Symbol* name, char l1, char l2) : _name(name), _loader_type1(l1), _loader_type2(l2) {
78 _name->increment_refcount();
79 }
80 DTLoaderConstraint() : _name(NULL), _loader_type1('0'), _loader_type2('0') {}
81 bool equals(const DTLoaderConstraint& t) {
82 return t._name == _name &&
83 ((t._loader_type1 == _loader_type1 && t._loader_type2 == _loader_type2) ||
84 (t._loader_type2 == _loader_type1 && t._loader_type1 == _loader_type2));
85 }
86 };
87
88 struct DTVerifierConstraint {
89 Symbol* _name;
90 Symbol* _from_name;
91 DTVerifierConstraint() : _name(NULL), _from_name(NULL) {}
92 DTVerifierConstraint(Symbol* n, Symbol* fn) : _name(n), _from_name(fn) {
93 _name->increment_refcount();
94 _from_name->increment_refcount();
95 }
96 };
97
98 InstanceKlass* _klass;
99 bool _failed_verification;
100 int _id;
101 int _clsfile_size;
102 int _clsfile_crc32;
103 GrowableArray<DTVerifierConstraint>* _verifier_constraints;
104 GrowableArray<char>* _verifier_constraint_flags;
105 bool _is_archived_lambda_proxy;
106 GrowableArray<DTLoaderConstraint>* _loader_constraints;
107
108 DumpTimeSharedClassInfo() {
109 _klass = NULL;
110 _failed_verification = false;
111 _id = -1;
112 _clsfile_size = -1;
113 _clsfile_crc32 = -1;
114 _excluded = false;
115 _verifier_constraints = NULL;
116 _verifier_constraint_flags = NULL;
117 _is_archived_lambda_proxy = false;
118 _loader_constraints = NULL;
119 }
120
121 void add_verification_constraint(InstanceKlass* k, Symbol* name,
122 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object);
123 void record_linking_constraint(Symbol* name, Handle loader1, Handle loader2);
124
125 bool is_builtin() {
126 return SystemDictionaryShared::is_builtin(_klass);
127 }
128
129 int num_verifier_constraints() {
130 if (_verifier_constraint_flags != NULL) {
131 return _verifier_constraint_flags->length();
132 } else {
133 return 0;
134 }
135 }
136
137 int num_loader_constraints() {
138 if (_loader_constraints != NULL) {
139 return _loader_constraints->length();
140 } else {
141 return 0;
142 }
143 }
144
145 void metaspace_pointers_do(MetaspaceClosure* it) {
146 it->push(&_klass);
147 if (_verifier_constraints != NULL) {
148 for (int i = 0; i < _verifier_constraints->length(); i++) {
149 DTVerifierConstraint* cons = _verifier_constraints->adr_at(i);
150 it->push(&cons->_name);
151 it->push(&cons->_from_name);
152 }
153 }
154 if (_loader_constraints != NULL) {
155 for (int i = 0; i < _loader_constraints->length(); i++) {
156 DTLoaderConstraint* lc = _loader_constraints->adr_at(i);
157 it->push(&lc->_name);
158 }
159 }
160 }
161
162 void set_excluded() {
163 _excluded = true;
164 }
165
166 bool is_excluded() {
167 // _klass may become NULL due to DynamicArchiveBuilder::set_to_null
168 return _excluded || _failed_verification || _klass == NULL;
169 }
170
171 void set_failed_verification() {
172 _failed_verification = true;
173 }
174
175 bool failed_verification() {
176 return _failed_verification;
177 }
178 };
179
180 inline unsigned DumpTimeSharedClassTable_hash(InstanceKlass* const& k) {
181 if (DumpSharedSpaces) {
182 // Deterministic archive contents
183 uintx delta = k->name() - MetaspaceShared::symbol_rs_base();
184 return primitive_hash<uintx>(delta);
185 } else {
186 // Deterministic archive is not possible because classes can be loaded
187 // in multiple threads.
188 return primitive_hash<InstanceKlass*>(k);
189 }
190 }
191
192 class DumpTimeSharedClassTable: public ResourceHashtable<
193 InstanceKlass*,
194 DumpTimeSharedClassInfo,
195 &DumpTimeSharedClassTable_hash,
196 primitive_equals<InstanceKlass*>,
197 15889, // prime number
198 ResourceObj::C_HEAP>
199 {
200 int _builtin_count;
201 int _unregistered_count;
202 public:
203 DumpTimeSharedClassInfo* find_or_allocate_info_for(InstanceKlass* k) {
204 bool created = false;
205 DumpTimeSharedClassInfo* p = put_if_absent(k, &created);
206 if (created) {
207 assert(!SystemDictionaryShared::no_class_loading_should_happen(),
208 "no new classes can be loaded while dumping archive");
209 p->_klass = k;
210 } else {
211 assert(p->_klass == k, "Sanity");
212 }
213 return p;
214 }
215
216 class CountClassByCategory : StackObj {
217 DumpTimeSharedClassTable* _table;
218 public:
219 CountClassByCategory(DumpTimeSharedClassTable* table) : _table(table) {}
220 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
221 if (!info.is_excluded()) {
222 if (info.is_builtin()) {
223 ++ _table->_builtin_count;
224 } else {
225 ++ _table->_unregistered_count;
226 }
227 }
228 return true; // keep on iterating
229 }
230 };
231
232 void update_counts() {
233 _builtin_count = 0;
234 _unregistered_count = 0;
235 CountClassByCategory counter(this);
236 iterate(&counter);
237 }
238
239 int count_of(bool is_builtin) const {
240 if (is_builtin) {
241 return _builtin_count;
242 } else {
243 return _unregistered_count;
244 }
245 }
246 };
247
248 class LambdaProxyClassKey {
249 template <typename T> static void original_to_target(T& field) {
250 if (field != NULL) {
251 field = DynamicArchive::original_to_target(field);
252 ArchivePtrMarker::mark_pointer(&field);
253 }
254 }
255
256 InstanceKlass* _caller_ik;
257 Symbol* _invoked_name;
258 Symbol* _invoked_type;
259 Symbol* _method_type;
260 Method* _member_method;
261 Symbol* _instantiated_method_type;
262
263 public:
264 LambdaProxyClassKey(InstanceKlass* caller_ik,
265 Symbol* invoked_name,
266 Symbol* invoked_type,
267 Symbol* method_type,
268 Method* member_method,
269 Symbol* instantiated_method_type) :
270 _caller_ik(caller_ik),
271 _invoked_name(invoked_name),
272 _invoked_type(invoked_type),
273 _method_type(method_type),
274 _member_method(member_method),
275 _instantiated_method_type(instantiated_method_type) {}
276
277 void original_to_target() {
278 original_to_target(_caller_ik);
279 original_to_target(_instantiated_method_type);
280 original_to_target(_invoked_name);
281 original_to_target(_invoked_type);
282 original_to_target(_member_method);
283 original_to_target(_method_type);
284 }
285
286 bool equals(LambdaProxyClassKey const& other) const {
287 return _caller_ik == other._caller_ik &&
288 _invoked_name == other._invoked_name &&
289 _invoked_type == other._invoked_type &&
290 _method_type == other._method_type &&
291 _member_method == other._member_method &&
292 _instantiated_method_type == other._instantiated_method_type;
293 }
294
295 unsigned int hash() const {
296 return SystemDictionaryShared::hash_for_shared_dictionary(_caller_ik) +
297 SystemDictionaryShared::hash_for_shared_dictionary(_invoked_name) +
298 SystemDictionaryShared::hash_for_shared_dictionary(_invoked_type) +
299 SystemDictionaryShared::hash_for_shared_dictionary(_method_type) +
300 SystemDictionaryShared::hash_for_shared_dictionary(_instantiated_method_type);
301 }
302
303 unsigned int dumptime_hash() const {
304 return primitive_hash<InstanceKlass*>(_caller_ik) +
305 primitive_hash<Symbol*>(_invoked_name) +
306 primitive_hash<Symbol*>(_invoked_type) +
307 primitive_hash<Symbol*>(_method_type) +
308 primitive_hash<Symbol*>(_instantiated_method_type);
309 }
310
311 static inline unsigned int DUMPTIME_HASH(LambdaProxyClassKey const& key) {
312 return (key.dumptime_hash());
313 }
314
315 static inline bool DUMPTIME_EQUALS(
316 LambdaProxyClassKey const& k1, LambdaProxyClassKey const& k2) {
317 return (k1.equals(k2));
318 }
319 };
320
321
322 class DumpTimeLambdaProxyClassInfo {
323 public:
324 GrowableArray<InstanceKlass*>* _proxy_klass;
325 DumpTimeLambdaProxyClassInfo() : _proxy_klass(NULL) {}
326 void add_proxy_klass(InstanceKlass* proxy_klass) {
327 if (_proxy_klass == NULL) {
328 _proxy_klass = new (ResourceObj::C_HEAP, mtInternal)GrowableArray<InstanceKlass*>(5, true);
329 }
330 assert(_proxy_klass != NULL, "sanity");
331 _proxy_klass->append(proxy_klass);
332 }
333 };
334
335 class RunTimeLambdaProxyClassInfo {
336 LambdaProxyClassKey _key;
337 InstanceKlass* _proxy_klass;
338 public:
339 RunTimeLambdaProxyClassInfo(LambdaProxyClassKey key, InstanceKlass* proxy_klass) :
340 _key(key), _proxy_klass(proxy_klass) {}
341
342 InstanceKlass* proxy_klass() const { return _proxy_klass; }
343
344 // Used by LambdaProxyClassDictionary to implement OffsetCompactHashtable::EQUALS
345 static inline bool EQUALS(
346 const RunTimeLambdaProxyClassInfo* value, LambdaProxyClassKey* key, int len_unused) {
347 return (value->_key.equals(*key));
348 }
349 void init(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
350 _key = key;
351 _key.original_to_target();
352 _proxy_klass = DynamicArchive::original_to_target(info._proxy_klass->at(0));
353 ArchivePtrMarker::mark_pointer(&_proxy_klass);
354 }
355
356 unsigned int hash() const {
357 return _key.hash();
358 }
359 };
360
361 class LambdaProxyClassDictionary : public OffsetCompactHashtable<
362 LambdaProxyClassKey*,
363 const RunTimeLambdaProxyClassInfo*,
364 RunTimeLambdaProxyClassInfo::EQUALS> {};
365
366 LambdaProxyClassDictionary _lambda_proxy_class_dictionary;
367
368 class DumpTimeLambdaProxyClassDictionary
369 : public ResourceHashtable<LambdaProxyClassKey,
370 DumpTimeLambdaProxyClassInfo,
371 LambdaProxyClassKey::DUMPTIME_HASH,
372 LambdaProxyClassKey::DUMPTIME_EQUALS,
373 137, // prime number
374 ResourceObj::C_HEAP> {
375 public:
376 int _count;
377 };
378
379 DumpTimeLambdaProxyClassDictionary* _dumptime_lambda_proxy_class_dictionary = NULL;
380
381 static void add_to_dump_time_lambda_proxy_class_dictionary(LambdaProxyClassKey key,
382 InstanceKlass* proxy_klass) {
383 if (_dumptime_lambda_proxy_class_dictionary == NULL) {
384 _dumptime_lambda_proxy_class_dictionary =
385 new (ResourceObj::C_HEAP, mtClass)DumpTimeLambdaProxyClassDictionary();
386 }
387 DumpTimeLambdaProxyClassInfo* lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
388 if (lambda_info == NULL) {
389 DumpTimeLambdaProxyClassInfo info;
390 info.add_proxy_klass(proxy_klass);
391 _dumptime_lambda_proxy_class_dictionary->put(key, info);
392 //lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
393 //assert(lambda_info->_proxy_klass == proxy_klass, "must be"); // debug only -- remove
394 ++_dumptime_lambda_proxy_class_dictionary->_count;
395 } else {
396 lambda_info->add_proxy_klass(proxy_klass);
397 }
398 }
399
400 class RunTimeSharedClassInfo {
401 public:
402 struct CrcInfo {
403 int _clsfile_size;
404 int _clsfile_crc32;
405 };
406
407 // This is different than DumpTimeSharedClassInfo::DTVerifierConstraint. We use
408 // u4 instead of Symbol* to save space on 64-bit CPU.
409 struct RTVerifierConstraint {
410 u4 _name;
411 u4 _from_name;
412 Symbol* name() { return (Symbol*)(SharedBaseAddress + _name);}
413 Symbol* from_name() { return (Symbol*)(SharedBaseAddress + _from_name); }
414 };
415
416 struct RTLoaderConstraint {
417 u4 _name;
418 char _loader_type1;
419 char _loader_type2;
420 Symbol* constraint_name() {
421 return (Symbol*)(SharedBaseAddress + _name);
422 }
423 };
424
425 InstanceKlass* _klass;
426 int _num_verifier_constraints;
427 int _num_loader_constraints;
428
429 // optional CrcInfo _crc; (only for UNREGISTERED classes)
430 // optional InstanceKlass* _nest_host
431 // optional RTLoaderConstraint _loader_constraint_types[_num_loader_constraints]
432 // optional RTVerifierConstraint _verifier_constraints[_num_verifier_constraints]
433 // optional char _verifier_constraint_flags[_num_verifier_constraints]
434
435 private:
436 static size_t header_size_size() {
437 return sizeof(RunTimeSharedClassInfo);
438 }
439 static size_t crc_size(InstanceKlass* klass) {
440 if (!SystemDictionaryShared::is_builtin(klass)) {
441 return sizeof(CrcInfo);
442 } else {
443 return 0;
444 }
445 }
446 static size_t verifier_constraints_size(int num_verifier_constraints) {
447 return sizeof(RTVerifierConstraint) * num_verifier_constraints;
448 }
449 static size_t verifier_constraint_flags_size(int num_verifier_constraints) {
450 return sizeof(char) * num_verifier_constraints;
451 }
452 static size_t loader_constraints_size(int num_loader_constraints) {
453 return sizeof(RTLoaderConstraint) * num_loader_constraints;
454 }
455 static size_t nest_host_size(InstanceKlass* klass) {
456 if (klass->is_hidden()) {
457 return sizeof(InstanceKlass*);
458 } else {
459 return 0;
460 }
461 }
462
463 public:
464 static size_t byte_size(InstanceKlass* klass, int num_verifier_constraints, int num_loader_constraints) {
465 return header_size_size() +
466 crc_size(klass) +
467 nest_host_size(klass) +
468 loader_constraints_size(num_loader_constraints) +
469 verifier_constraints_size(num_verifier_constraints) +
470 verifier_constraint_flags_size(num_verifier_constraints);
471 }
472
473 private:
474 size_t crc_offset() const {
475 return header_size_size();
476 }
477
478 size_t nest_host_offset() const {
479 return crc_offset() + crc_size(_klass);
480 }
481
482 size_t loader_constraints_offset() const {
483 return nest_host_offset() + nest_host_size(_klass);
484 }
485 size_t verifier_constraints_offset() const {
486 return loader_constraints_offset() + loader_constraints_size(_num_loader_constraints);
487 }
488 size_t verifier_constraint_flags_offset() const {
489 return verifier_constraints_offset() + verifier_constraints_size(_num_verifier_constraints);
490 }
491
492 void check_verifier_constraint_offset(int i) const {
493 assert(0 <= i && i < _num_verifier_constraints, "sanity");
494 }
495
496 void check_loader_constraint_offset(int i) const {
497 assert(0 <= i && i < _num_loader_constraints, "sanity");
498 }
499
500 public:
501 CrcInfo* crc() const {
502 assert(crc_size(_klass) > 0, "must be");
503 return (CrcInfo*)(address(this) + crc_offset());
504 }
505 RTVerifierConstraint* verifier_constraints() {
506 assert(_num_verifier_constraints > 0, "sanity");
507 return (RTVerifierConstraint*)(address(this) + verifier_constraints_offset());
508 }
509 RTVerifierConstraint* verifier_constraint_at(int i) {
510 check_verifier_constraint_offset(i);
511 return verifier_constraints() + i;
512 }
513
514 char* verifier_constraint_flags() {
515 assert(_num_verifier_constraints > 0, "sanity");
516 return (char*)(address(this) + verifier_constraint_flags_offset());
517 }
518
519 InstanceKlass** nest_host_addr() {
520 assert(_klass->is_hidden(), "sanity");
521 return (InstanceKlass**)(address(this) + nest_host_offset());
522 }
523 InstanceKlass* nest_host() {
524 return *nest_host_addr();
525 }
526 void set_nest_host(InstanceKlass* k) {
527 *nest_host_addr() = k;
528 ArchivePtrMarker::mark_pointer((address*)nest_host_addr());
529 }
530
531 RTLoaderConstraint* loader_constraints() {
532 assert(_num_loader_constraints > 0, "sanity");
533 return (RTLoaderConstraint*)(address(this) + loader_constraints_offset());
534 }
535
536 RTLoaderConstraint* loader_constraint_at(int i) {
537 check_loader_constraint_offset(i);
538 return loader_constraints() + i;
539 }
540
541 static u4 object_delta_u4(Symbol* sym) {
542 if (DynamicDumpSharedSpaces) {
543 sym = DynamicArchive::original_to_target(sym);
544 }
545 return MetaspaceShared::object_delta_u4(sym);
546 }
547
548 void init(DumpTimeSharedClassInfo& info) {
549 _klass = info._klass;
550 if (!SystemDictionaryShared::is_builtin(_klass)) {
551 CrcInfo* c = crc();
552 c->_clsfile_size = info._clsfile_size;
553 c->_clsfile_crc32 = info._clsfile_crc32;
554 }
555 _num_verifier_constraints = info.num_verifier_constraints();
556 _num_loader_constraints = info.num_loader_constraints();
557 int i;
558 if (_num_verifier_constraints > 0) {
559 RTVerifierConstraint* vf_constraints = verifier_constraints();
560 char* flags = verifier_constraint_flags();
561 for (i = 0; i < _num_verifier_constraints; i++) {
562 vf_constraints[i]._name = object_delta_u4(info._verifier_constraints->at(i)._name);
563 vf_constraints[i]._from_name = object_delta_u4(info._verifier_constraints->at(i)._from_name);
564 }
565 for (i = 0; i < _num_verifier_constraints; i++) {
566 flags[i] = info._verifier_constraint_flags->at(i);
567 }
568 }
569
570 if (_num_loader_constraints > 0) {
571 RTLoaderConstraint* ld_constraints = loader_constraints();
572 for (i = 0; i < _num_loader_constraints; i++) {
573 ld_constraints[i]._name = object_delta_u4(info._loader_constraints->at(i)._name);
574 ld_constraints[i]._loader_type1 = info._loader_constraints->at(i)._loader_type1;
575 ld_constraints[i]._loader_type2 = info._loader_constraints->at(i)._loader_type2;
576 }
577 }
578 if (DynamicDumpSharedSpaces) {
579 if (_klass->is_hidden()) {
580 Thread* THREAD = Thread::current();
581 InstanceKlass* n_h = _klass->nest_host(THREAD);
582 n_h = DynamicArchive::original_to_target(n_h);
583 set_nest_host(n_h);
584 ArchivePtrMarker::mark_pointer(&n_h);
585 }
586 _klass = DynamicArchive::original_to_target(info._klass);
587 }
588 ArchivePtrMarker::mark_pointer(&_klass);
589 }
590
591 bool matches(int clsfile_size, int clsfile_crc32) const {
592 return crc()->_clsfile_size == clsfile_size &&
593 crc()->_clsfile_crc32 == clsfile_crc32;
594 }
595
596 char verifier_constraint_flag(int i) {
597 check_verifier_constraint_offset(i);
598 return verifier_constraint_flags()[i];
599 }
600
601 private:
602 // ArchiveCompactor::allocate() has reserved a pointer immediately before
603 // archived InstanceKlasses. We can use this slot to do a quick
604 // lookup of InstanceKlass* -> RunTimeSharedClassInfo* without
605 // building a new hashtable.
606 //
607 // info_pointer_addr(klass) --> 0x0100 RunTimeSharedClassInfo*
608 // InstanceKlass* klass --> 0x0108 <C++ vtbl>
609 // 0x0110 fields from Klass ...
610 static RunTimeSharedClassInfo** info_pointer_addr(InstanceKlass* klass) {
611 return &((RunTimeSharedClassInfo**)klass)[-1];
612 }
613
614 public:
615 static RunTimeSharedClassInfo* get_for(InstanceKlass* klass) {
616 assert(klass->is_shared(), "don't call for non-shared class");
617 return *info_pointer_addr(klass);
618 }
619 static void set_for(InstanceKlass* klass, RunTimeSharedClassInfo* record) {
620 if (DynamicDumpSharedSpaces) {
621 klass = DynamicArchive::original_to_buffer(klass);
622 *info_pointer_addr(klass) = DynamicArchive::buffer_to_target(record);
623 } else {
624 *info_pointer_addr(klass) = record;
625 }
626
627 ArchivePtrMarker::mark_pointer(info_pointer_addr(klass));
628 }
629
630 // Used by RunTimeSharedDictionary to implement OffsetCompactHashtable::EQUALS
631 static inline bool EQUALS(
632 const RunTimeSharedClassInfo* value, Symbol* key, int len_unused) {
633 return (value->_klass->name() == key);
634 }
635 };
636
637 class RunTimeSharedDictionary : public OffsetCompactHashtable<
638 Symbol*,
639 const RunTimeSharedClassInfo*,
640 RunTimeSharedClassInfo::EQUALS> {};
641
642 static DumpTimeSharedClassTable* _dumptime_table = NULL;
643 // SystemDictionaries in the base layer static archive
644 static RunTimeSharedDictionary _builtin_dictionary;
645 static RunTimeSharedDictionary _unregistered_dictionary;
646 // SystemDictionaries in the top layer dynamic archive
647 static RunTimeSharedDictionary _dynamic_builtin_dictionary;
648 static RunTimeSharedDictionary _dynamic_unregistered_dictionary;
649
650 oop SystemDictionaryShared::shared_protection_domain(int index) {
651 return _shared_protection_domains->obj_at(index);
652 }
653
654 oop SystemDictionaryShared::shared_jar_url(int index) {
655 return _shared_jar_urls->obj_at(index);
656 }
657
658 oop SystemDictionaryShared::shared_jar_manifest(int index) {
659 return _shared_jar_manifests->obj_at(index);
660 }
661
662 Handle SystemDictionaryShared::get_shared_jar_manifest(int shared_path_index, TRAPS) {
663 Handle manifest ;
664 if (shared_jar_manifest(shared_path_index) == NULL) {
665 SharedClassPathEntry* ent = FileMapInfo::shared_path(shared_path_index);
666 long size = ent->manifest_size();
667 if (size <= 0) {
668 return Handle();
669 }
670
671 // ByteArrayInputStream bais = new ByteArrayInputStream(buf);
672 const char* src = ent->manifest();
673 assert(src != NULL, "No Manifest data");
674 typeArrayOop buf = oopFactory::new_byteArray(size, CHECK_NH);
675 typeArrayHandle bufhandle(THREAD, buf);
676 ArrayAccess<>::arraycopy_from_native(reinterpret_cast<const jbyte*>(src),
677 buf, typeArrayOopDesc::element_offset<jbyte>(0), size);
678
679 Handle bais = JavaCalls::construct_new_instance(SystemDictionary::ByteArrayInputStream_klass(),
680 vmSymbols::byte_array_void_signature(),
681 bufhandle, CHECK_NH);
682
683 // manifest = new Manifest(bais)
684 manifest = JavaCalls::construct_new_instance(SystemDictionary::Jar_Manifest_klass(),
685 vmSymbols::input_stream_void_signature(),
686 bais, CHECK_NH);
687 atomic_set_shared_jar_manifest(shared_path_index, manifest());
688 }
689
690 manifest = Handle(THREAD, shared_jar_manifest(shared_path_index));
691 assert(manifest.not_null(), "sanity");
692 return manifest;
693 }
694
695 Handle SystemDictionaryShared::get_shared_jar_url(int shared_path_index, TRAPS) {
696 Handle url_h;
697 if (shared_jar_url(shared_path_index) == NULL) {
698 JavaValue result(T_OBJECT);
699 const char* path = FileMapInfo::shared_path_name(shared_path_index);
700 Handle path_string = java_lang_String::create_from_str(path, CHECK_(url_h));
701 Klass* classLoaders_klass =
702 SystemDictionary::jdk_internal_loader_ClassLoaders_klass();
703 JavaCalls::call_static(&result, classLoaders_klass,
704 vmSymbols::toFileURL_name(),
705 vmSymbols::toFileURL_signature(),
706 path_string, CHECK_(url_h));
707
708 atomic_set_shared_jar_url(shared_path_index, (oop)result.get_jobject());
709 }
710
711 url_h = Handle(THREAD, shared_jar_url(shared_path_index));
712 assert(url_h.not_null(), "sanity");
713 return url_h;
714 }
715
716 Handle SystemDictionaryShared::get_package_name(Symbol* class_name, TRAPS) {
717 ResourceMark rm(THREAD);
718 Handle pkgname_string;
719 Symbol* pkg = ClassLoader::package_from_class_name(class_name);
720 if (pkg != NULL) { // Package prefix found
721 const char* pkgname = pkg->as_klass_external_name();
722 pkgname_string = java_lang_String::create_from_str(pkgname,
723 CHECK_(pkgname_string));
724 }
725 return pkgname_string;
726 }
727
728 // Define Package for shared app classes from JAR file and also checks for
729 // package sealing (all done in Java code)
730 // See http://docs.oracle.com/javase/tutorial/deployment/jar/sealman.html
731 void SystemDictionaryShared::define_shared_package(Symbol* class_name,
732 Handle class_loader,
733 Handle manifest,
734 Handle url,
735 TRAPS) {
736 assert(SystemDictionary::is_system_class_loader(class_loader()), "unexpected class loader");
737 // get_package_name() returns a NULL handle if the class is in unnamed package
738 Handle pkgname_string = get_package_name(class_name, CHECK);
739 if (pkgname_string.not_null()) {
740 Klass* app_classLoader_klass = SystemDictionary::jdk_internal_loader_ClassLoaders_AppClassLoader_klass();
741 JavaValue result(T_OBJECT);
742 JavaCallArguments args(3);
743 args.set_receiver(class_loader);
744 args.push_oop(pkgname_string);
745 args.push_oop(manifest);
746 args.push_oop(url);
747 JavaCalls::call_virtual(&result, app_classLoader_klass,
748 vmSymbols::defineOrCheckPackage_name(),
749 vmSymbols::defineOrCheckPackage_signature(),
750 &args,
751 CHECK);
752 }
753 }
754
755 // Get the ProtectionDomain associated with the CodeSource from the classloader.
756 Handle SystemDictionaryShared::get_protection_domain_from_classloader(Handle class_loader,
757 Handle url, TRAPS) {
758 // CodeSource cs = new CodeSource(url, null);
759 Handle cs = JavaCalls::construct_new_instance(SystemDictionary::CodeSource_klass(),
760 vmSymbols::url_code_signer_array_void_signature(),
761 url, Handle(), CHECK_NH);
762
763 // protection_domain = SecureClassLoader.getProtectionDomain(cs);
764 Klass* secureClassLoader_klass = SystemDictionary::SecureClassLoader_klass();
765 JavaValue obj_result(T_OBJECT);
766 JavaCalls::call_virtual(&obj_result, class_loader, secureClassLoader_klass,
767 vmSymbols::getProtectionDomain_name(),
768 vmSymbols::getProtectionDomain_signature(),
769 cs, CHECK_NH);
770 return Handle(THREAD, (oop)obj_result.get_jobject());
771 }
772
773 // Returns the ProtectionDomain associated with the JAR file identified by the url.
774 Handle SystemDictionaryShared::get_shared_protection_domain(Handle class_loader,
775 int shared_path_index,
776 Handle url,
777 TRAPS) {
778 Handle protection_domain;
779 if (shared_protection_domain(shared_path_index) == NULL) {
780 Handle pd = get_protection_domain_from_classloader(class_loader, url, THREAD);
781 atomic_set_shared_protection_domain(shared_path_index, pd());
782 }
783
784 // Acquire from the cache because if another thread beats the current one to
785 // set the shared protection_domain and the atomic_set fails, the current thread
786 // needs to get the updated protection_domain from the cache.
787 protection_domain = Handle(THREAD, shared_protection_domain(shared_path_index));
788 assert(protection_domain.not_null(), "sanity");
789 return protection_domain;
790 }
791
792 // Returns the ProtectionDomain associated with the moduleEntry.
793 Handle SystemDictionaryShared::get_shared_protection_domain(Handle class_loader,
794 ModuleEntry* mod, TRAPS) {
795 ClassLoaderData *loader_data = mod->loader_data();
796 if (mod->shared_protection_domain() == NULL) {
797 Symbol* location = mod->location();
798 if (location != NULL) {
799 Handle location_string = java_lang_String::create_from_symbol(
800 location, CHECK_NH);
801 Handle url;
802 JavaValue result(T_OBJECT);
803 if (location->starts_with("jrt:/")) {
804 url = JavaCalls::construct_new_instance(SystemDictionary::URL_klass(),
805 vmSymbols::string_void_signature(),
806 location_string, CHECK_NH);
807 } else {
808 Klass* classLoaders_klass =
809 SystemDictionary::jdk_internal_loader_ClassLoaders_klass();
810 JavaCalls::call_static(&result, classLoaders_klass, vmSymbols::toFileURL_name(),
811 vmSymbols::toFileURL_signature(),
812 location_string, CHECK_NH);
813 url = Handle(THREAD, (oop)result.get_jobject());
814 }
815
816 Handle pd = get_protection_domain_from_classloader(class_loader, url,
817 CHECK_NH);
818 mod->set_shared_protection_domain(loader_data, pd);
819 }
820 }
821
822 Handle protection_domain(THREAD, mod->shared_protection_domain());
823 assert(protection_domain.not_null(), "sanity");
824 return protection_domain;
825 }
826
827 // Initializes the java.lang.Package and java.security.ProtectionDomain objects associated with
828 // the given InstanceKlass.
829 // Returns the ProtectionDomain for the InstanceKlass.
830 Handle SystemDictionaryShared::init_security_info(Handle class_loader, InstanceKlass* ik, PackageEntry* pkg_entry, TRAPS) {
831 Handle pd;
832
833 if (ik != NULL) {
834 int index = ik->shared_classpath_index();
835 assert(index >= 0, "Sanity");
836 SharedClassPathEntry* ent = FileMapInfo::shared_path(index);
837 Symbol* class_name = ik->name();
838
839 if (ent->is_modules_image()) {
840 // For shared app/platform classes originated from the run-time image:
841 // The ProtectionDomains are cached in the corresponding ModuleEntries
842 // for fast access by the VM.
843 // all packages from module image are already created during VM bootstrap in
844 // Modules::define_module().
845 assert(pkg_entry != NULL, "archived class in module image cannot be from unnamed package");
846 ModuleEntry* mod_entry = pkg_entry->module();
847 pd = get_shared_protection_domain(class_loader, mod_entry, THREAD);
848 } else {
849 // For shared app/platform classes originated from JAR files on the class path:
850 // Each of the 3 SystemDictionaryShared::_shared_xxx arrays has the same length
851 // as the shared classpath table in the shared archive (see
852 // FileMap::_shared_path_table in filemap.hpp for details).
853 //
854 // If a shared InstanceKlass k is loaded from the class path, let
855 //
856 // index = k->shared_classpath_index():
857 //
858 // FileMap::_shared_path_table[index] identifies the JAR file that contains k.
859 //
860 // k's protection domain is:
861 //
862 // ProtectionDomain pd = _shared_protection_domains[index];
863 //
864 // and k's Package is initialized using
865 //
866 // manifest = _shared_jar_manifests[index];
867 // url = _shared_jar_urls[index];
868 // define_shared_package(class_name, class_loader, manifest, url, CHECK_(pd));
869 //
870 // Note that if an element of these 3 _shared_xxx arrays is NULL, it will be initialized by
871 // the corresponding SystemDictionaryShared::get_shared_xxx() function.
872 Handle manifest = get_shared_jar_manifest(index, CHECK_(pd));
873 Handle url = get_shared_jar_url(index, CHECK_(pd));
874 define_shared_package(class_name, class_loader, manifest, url, CHECK_(pd));
875 pd = get_shared_protection_domain(class_loader, index, url, CHECK_(pd));
876 }
877 }
878 return pd;
879 }
880
881 bool SystemDictionaryShared::is_sharing_possible(ClassLoaderData* loader_data) {
882 oop class_loader = loader_data->class_loader();
883 return (class_loader == NULL ||
884 SystemDictionary::is_system_class_loader(class_loader) ||
885 SystemDictionary::is_platform_class_loader(class_loader));
886 }
887
888 // Currently AppCDS only archives classes from the run-time image, the
889 // -Xbootclasspath/a path, the class path, and the module path.
890 //
891 // Check if a shared class can be loaded by the specific classloader. Following
892 // are the "visible" archived classes for different classloaders.
893 //
894 // NULL classloader:
895 // - see SystemDictionary::is_shared_class_visible()
896 // Platform classloader:
897 // - Module class from runtime image. ModuleEntry must be defined in the
898 // classloader.
899 // App classloader:
900 // - Module Class from runtime image and module path. ModuleEntry must be defined in the
901 // classloader.
902 // - Class from -cp. The class must have no PackageEntry defined in any of the
903 // boot/platform/app classloader, or must be in the unnamed module defined in the
904 // AppClassLoader.
905 bool SystemDictionaryShared::is_shared_class_visible_for_classloader(
906 InstanceKlass* ik,
907 Handle class_loader,
908 Symbol* pkg_name,
909 PackageEntry* pkg_entry,
910 ModuleEntry* mod_entry,
911 TRAPS) {
912 assert(class_loader.not_null(), "Class loader should not be NULL");
913 assert(Universe::is_module_initialized(), "Module system is not initialized");
914 ResourceMark rm(THREAD);
915
916 int path_index = ik->shared_classpath_index();
917 SharedClassPathEntry* ent =
918 (SharedClassPathEntry*)FileMapInfo::shared_path(path_index);
919
920 if (SystemDictionary::is_platform_class_loader(class_loader())) {
921 assert(ent != NULL, "shared class for PlatformClassLoader should have valid SharedClassPathEntry");
922 // The PlatformClassLoader can only load archived class originated from the
923 // run-time image. The class' PackageEntry/ModuleEntry must be
924 // defined by the PlatformClassLoader.
925 if (mod_entry != NULL) {
926 // PackageEntry/ModuleEntry is found in the classloader. Check if the
927 // ModuleEntry's location agrees with the archived class' origination.
928 if (ent->is_modules_image() && mod_entry->location()->starts_with("jrt:")) {
929 return true; // Module class from the runtime image
930 }
931 }
932 } else if (SystemDictionary::is_system_class_loader(class_loader())) {
933 assert(ent != NULL, "shared class for system loader should have valid SharedClassPathEntry");
934 if (pkg_name == NULL) {
935 // The archived class is in the unnamed package. Currently, the boot image
936 // does not contain any class in the unnamed package.
937 assert(!ent->is_modules_image(), "Class in the unnamed package must be from the classpath");
938 if (path_index >= ClassLoaderExt::app_class_paths_start_index()) {
939 assert(path_index < ClassLoaderExt::app_module_paths_start_index(), "invalid path_index");
940 return true;
941 }
942 } else {
943 // Check if this is from a PackageEntry/ModuleEntry defined in the AppClassloader.
944 if (pkg_entry == NULL) {
945 // It's not guaranteed that the class is from the classpath if the
946 // PackageEntry cannot be found from the AppClassloader. Need to check
947 // the boot and platform classloader as well.
948 ClassLoaderData* platform_loader_data =
949 ClassLoaderData::class_loader_data_or_null(SystemDictionary::java_platform_loader()); // can be NULL during bootstrap
950 if ((platform_loader_data == NULL ||
951 ClassLoader::get_package_entry(pkg_name, platform_loader_data) == NULL) &&
952 ClassLoader::get_package_entry(pkg_name, ClassLoaderData::the_null_class_loader_data()) == NULL) {
953 // The PackageEntry is not defined in any of the boot/platform/app classloaders.
954 // The archived class must from -cp path and not from the runtime image.
955 if (!ent->is_modules_image() && path_index >= ClassLoaderExt::app_class_paths_start_index() &&
956 path_index < ClassLoaderExt::app_module_paths_start_index()) {
957 return true;
958 }
959 }
960 } else if (mod_entry != NULL) {
961 // The package/module is defined in the AppClassLoader. We support
962 // archiving application module class from the runtime image or from
963 // a named module from a module path.
964 // Packages from the -cp path are in the unnamed_module.
965 if (ent->is_modules_image() && mod_entry->location()->starts_with("jrt:")) {
966 // shared module class from runtime image
967 return true;
968 } else if (pkg_entry->in_unnamed_module() && path_index >= ClassLoaderExt::app_class_paths_start_index() &&
969 path_index < ClassLoaderExt::app_module_paths_start_index()) {
970 // shared class from -cp
971 DEBUG_ONLY( \
972 ClassLoaderData* loader_data = class_loader_data(class_loader); \
973 assert(mod_entry == loader_data->unnamed_module(), "the unnamed module is not defined in the classloader");)
974 return true;
975 } else {
976 if(!pkg_entry->in_unnamed_module() &&
977 (path_index >= ClassLoaderExt::app_module_paths_start_index())&&
978 (path_index < FileMapInfo::get_number_of_shared_paths()) &&
979 (strcmp(ent->name(), ClassLoader::skip_uri_protocol(mod_entry->location()->as_C_string())) == 0)) {
980 // shared module class from module path
981 return true;
982 } else {
983 assert(path_index < FileMapInfo::get_number_of_shared_paths(), "invalid path_index");
984 }
985 }
986 }
987 }
988 } else {
989 // TEMP: if a shared class can be found by a custom loader, consider it visible now.
990 // FIXME: is this actually correct?
991 return true;
992 }
993 return false;
994 }
995
996 bool SystemDictionaryShared::has_platform_or_app_classes() {
997 if (FileMapInfo::current_info()->has_platform_or_app_classes()) {
998 return true;
999 }
1000 if (DynamicArchive::is_mapped() &&
1001 FileMapInfo::dynamic_info()->has_platform_or_app_classes()) {
1002 return true;
1003 }
1004 return false;
1005 }
1006
1007 // The following stack shows how this code is reached:
1008 //
1009 // [0] SystemDictionaryShared::find_or_load_shared_class()
1010 // [1] JVM_FindLoadedClass
1011 // [2] java.lang.ClassLoader.findLoadedClass0()
1012 // [3] java.lang.ClassLoader.findLoadedClass()
1013 // [4] jdk.internal.loader.BuiltinClassLoader.loadClassOrNull()
1014 // [5] jdk.internal.loader.BuiltinClassLoader.loadClass()
1015 // [6] jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(), or
1016 // jdk.internal.loader.ClassLoaders$PlatformClassLoader.loadClass()
1017 //
1018 // AppCDS supports fast class loading for these 2 built-in class loaders:
1019 // jdk.internal.loader.ClassLoaders$PlatformClassLoader
1020 // jdk.internal.loader.ClassLoaders$AppClassLoader
1021 // with the following assumptions (based on the JDK core library source code):
1022 //
1023 // [a] these two loaders use the BuiltinClassLoader.loadClassOrNull() to
1024 // load the named class.
1025 // [b] BuiltinClassLoader.loadClassOrNull() first calls findLoadedClass(name).
1026 // [c] At this point, if we can find the named class inside the
1027 // shared_dictionary, we can perform further checks (see
1028 // is_shared_class_visible_for_classloader() to ensure that this class
1029 // was loaded by the same class loader during dump time.
1030 //
1031 // Given these assumptions, we intercept the findLoadedClass() call to invoke
1032 // SystemDictionaryShared::find_or_load_shared_class() to load the shared class from
1033 // the archive for the 2 built-in class loaders. This way,
1034 // we can improve start-up because we avoid decoding the classfile,
1035 // and avoid delegating to the parent loader.
1036 //
1037 // NOTE: there's a lot of assumption about the Java code. If any of that change, this
1038 // needs to be redesigned.
1039
1040 InstanceKlass* SystemDictionaryShared::find_or_load_shared_class(
1041 Symbol* name, Handle class_loader, TRAPS) {
1042 InstanceKlass* k = NULL;
1043 if (UseSharedSpaces) {
1044 if (!has_platform_or_app_classes()) {
1045 return NULL;
1046 }
1047
1048 if (SystemDictionary::is_system_class_loader(class_loader()) ||
1049 SystemDictionary::is_platform_class_loader(class_loader())) {
1050 // Fix for 4474172; see evaluation for more details
1051 class_loader = Handle(
1052 THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
1053 ClassLoaderData *loader_data = register_loader(class_loader);
1054 Dictionary* dictionary = loader_data->dictionary();
1055
1056 unsigned int d_hash = dictionary->compute_hash(name);
1057
1058 bool DoObjectLock = true;
1059 if (is_parallelCapable(class_loader)) {
1060 DoObjectLock = false;
1061 }
1062
1063 // Make sure we are synchronized on the class loader before we proceed
1064 //
1065 // Note: currently, find_or_load_shared_class is called only from
1066 // JVM_FindLoadedClass and used for PlatformClassLoader and AppClassLoader,
1067 // which are parallel-capable loaders, so this lock is NOT taken.
1068 Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
1069 check_loader_lock_contention(lockObject, THREAD);
1070 ObjectLocker ol(lockObject, THREAD, DoObjectLock);
1071
1072 {
1073 MutexLocker mu(THREAD, SystemDictionary_lock);
1074 InstanceKlass* check = find_class(d_hash, name, dictionary);
1075 if (check != NULL) {
1076 return check;
1077 }
1078 }
1079
1080 k = load_shared_class_for_builtin_loader(name, class_loader, THREAD);
1081 if (k != NULL) {
1082 define_instance_class(k, CHECK_NULL);
1083 }
1084 }
1085 }
1086 return k;
1087 }
1088
1089 PackageEntry* SystemDictionaryShared::get_package_entry_from_class_name(Handle class_loader, Symbol* class_name) {
1090 PackageEntry* pkg_entry = NULL;
1091 TempNewSymbol pkg_name = ClassLoader::package_from_class_name(class_name);
1092 if (pkg_name != NULL) {
1093 pkg_entry = class_loader_data(class_loader)->packages()->lookup_only(pkg_name);
1094 }
1095 return pkg_entry;
1096 }
1097
1098 InstanceKlass* SystemDictionaryShared::load_shared_class_for_builtin_loader(
1099 Symbol* class_name, Handle class_loader, TRAPS) {
1100 assert(UseSharedSpaces, "must be");
1101 InstanceKlass* ik = find_builtin_class(class_name);
1102
1103 if (ik != NULL) {
1104 if ((ik->is_shared_app_class() &&
1105 SystemDictionary::is_system_class_loader(class_loader())) ||
1106 (ik->is_shared_platform_class() &&
1107 SystemDictionary::is_platform_class_loader(class_loader()))) {
1108 PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, class_name);
1109 Handle protection_domain =
1110 SystemDictionaryShared::init_security_info(class_loader, ik, pkg_entry, CHECK_NULL);
1111 return load_shared_class(ik, class_loader, protection_domain, NULL, pkg_entry, THREAD);
1112 }
1113 }
1114 return NULL;
1115 }
1116
1117 void SystemDictionaryShared::oops_do(OopClosure* f) {
1118 f->do_oop((oop*)&_shared_protection_domains);
1119 f->do_oop((oop*)&_shared_jar_urls);
1120 f->do_oop((oop*)&_shared_jar_manifests);
1121 }
1122
1123 void SystemDictionaryShared::allocate_shared_protection_domain_array(int size, TRAPS) {
1124 if (_shared_protection_domains == NULL) {
1125 _shared_protection_domains = oopFactory::new_objArray(
1126 SystemDictionary::ProtectionDomain_klass(), size, CHECK);
1127 }
1128 }
1129
1130 void SystemDictionaryShared::allocate_shared_jar_url_array(int size, TRAPS) {
1131 if (_shared_jar_urls == NULL) {
1132 _shared_jar_urls = oopFactory::new_objArray(
1133 SystemDictionary::URL_klass(), size, CHECK);
1134 }
1135 }
1136
1137 void SystemDictionaryShared::allocate_shared_jar_manifest_array(int size, TRAPS) {
1138 if (_shared_jar_manifests == NULL) {
1139 _shared_jar_manifests = oopFactory::new_objArray(
1140 SystemDictionary::Jar_Manifest_klass(), size, CHECK);
1141 }
1142 }
1143
1144 void SystemDictionaryShared::allocate_shared_data_arrays(int size, TRAPS) {
1145 allocate_shared_protection_domain_array(size, CHECK);
1146 allocate_shared_jar_url_array(size, CHECK);
1147 allocate_shared_jar_manifest_array(size, CHECK);
1148 }
1149
1150 // This function is called for loading only UNREGISTERED classes
1151 InstanceKlass* SystemDictionaryShared::lookup_from_stream(Symbol* class_name,
1152 Handle class_loader,
1153 Handle protection_domain,
1154 const ClassFileStream* cfs,
1155 TRAPS) {
1156 if (!UseSharedSpaces) {
1157 return NULL;
1158 }
1159 if (class_name == NULL) { // don't do this for hidden and unsafe anonymous classes
1160 return NULL;
1161 }
1162 if (class_loader.is_null() ||
1163 SystemDictionary::is_system_class_loader(class_loader()) ||
1164 SystemDictionary::is_platform_class_loader(class_loader())) {
1165 // Do nothing for the BUILTIN loaders.
1166 return NULL;
1167 }
1168
1169 const RunTimeSharedClassInfo* record = find_record(&_unregistered_dictionary, &_dynamic_unregistered_dictionary, class_name);
1170 if (record == NULL) {
1171 return NULL;
1172 }
1173
1174 int clsfile_size = cfs->length();
1175 int clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
1176
1177 if (!record->matches(clsfile_size, clsfile_crc32)) {
1178 return NULL;
1179 }
1180
1181 return acquire_class_for_current_thread(record->_klass, class_loader,
1182 protection_domain, cfs,
1183 THREAD);
1184 }
1185
1186 InstanceKlass* SystemDictionaryShared::acquire_class_for_current_thread(
1187 InstanceKlass *ik,
1188 Handle class_loader,
1189 Handle protection_domain,
1190 const ClassFileStream *cfs,
1191 TRAPS) {
1192 ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
1193
1194 {
1195 MutexLocker mu(THREAD, SharedDictionary_lock);
1196 if (ik->class_loader_data() != NULL) {
1197 // ik is already loaded (by this loader or by a different loader)
1198 // or ik is being loaded by a different thread (by this loader or by a different loader)
1199 return NULL;
1200 }
1201
1202 // No other thread has acquired this yet, so give it to *this thread*
1203 ik->set_class_loader_data(loader_data);
1204 }
1205
1206 // No longer holding SharedDictionary_lock
1207 // No need to lock, as <ik> can be held only by a single thread.
1208 loader_data->add_class(ik);
1209
1210 // Get the package entry.
1211 PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, ik->name());
1212
1213 // Load and check super/interfaces, restore unsharable info
1214 InstanceKlass* shared_klass = load_shared_class(ik, class_loader, protection_domain,
1215 cfs, pkg_entry, THREAD);
1216 if (shared_klass == NULL || HAS_PENDING_EXCEPTION) {
1217 // TODO: clean up <ik> so it can be used again
1218 return NULL;
1219 }
1220
1221 return shared_klass;
1222 }
1223
1224 static ResourceHashtable<
1225 Symbol*, bool,
1226 primitive_hash<Symbol*>,
1227 primitive_equals<Symbol*>,
1228 6661, // prime number
1229 ResourceObj::C_HEAP> _loaded_unregistered_classes;
1230
1231 bool SystemDictionaryShared::add_unregistered_class(InstanceKlass* k, TRAPS) {
1232 // We don't allow duplicated unregistered classes of the same name.
1233 assert(DumpSharedSpaces, "only when dumping");
1234 Symbol* name = k->name();
1235 bool created = false;
1236 _loaded_unregistered_classes.put_if_absent(name, true, &created);
1237 if (created) {
1238 MutexLocker mu_r(THREAD, Compile_lock); // add_to_hierarchy asserts this.
1239 SystemDictionary::add_to_hierarchy(k, CHECK_false);
1240 }
1241 return created;
1242 }
1243
1244 // This function is called to resolve the super/interfaces of shared classes for
1245 // non-built-in loaders. E.g., ChildClass in the below example
1246 // where "super:" (and optionally "interface:") have been specified.
1247 //
1248 // java/lang/Object id: 0
1249 // Interface id: 2 super: 0 source: cust.jar
1250 // ChildClass id: 4 super: 0 interfaces: 2 source: cust.jar
1251 InstanceKlass* SystemDictionaryShared::dump_time_resolve_super_or_fail(
1252 Symbol* child_name, Symbol* class_name, Handle class_loader,
1253 Handle protection_domain, bool is_superclass, TRAPS) {
1254
1255 assert(DumpSharedSpaces, "only when dumping");
1256
1257 ClassListParser* parser = ClassListParser::instance();
1258 if (parser == NULL) {
1259 // We're still loading the well-known classes, before the ClassListParser is created.
1260 return NULL;
1261 }
1262 if (child_name->equals(parser->current_class_name())) {
1263 // When this function is called, all the numbered super and interface types
1264 // must have already been loaded. Hence this function is never recursively called.
1265 if (is_superclass) {
1266 return parser->lookup_super_for_current_class(class_name);
1267 } else {
1268 return parser->lookup_interface_for_current_class(class_name);
1269 }
1270 } else {
1271 // The VM is not trying to resolve a super type of parser->current_class_name().
1272 // Instead, it's resolving an error class (because parser->current_class_name() has
1273 // failed parsing or verification). Don't do anything here.
1274 return NULL;
1275 }
1276 }
1277
1278 DumpTimeSharedClassInfo* SystemDictionaryShared::find_or_allocate_info_for(InstanceKlass* k) {
1279 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
1280 if (_dumptime_table == NULL) {
1281 _dumptime_table = new (ResourceObj::C_HEAP, mtClass)DumpTimeSharedClassTable();
1282 }
1283 return _dumptime_table->find_or_allocate_info_for(k);
1284 }
1285
1286 void SystemDictionaryShared::set_shared_class_misc_info(InstanceKlass* k, ClassFileStream* cfs) {
1287 Arguments::assert_is_dumping_archive();
1288 assert(!is_builtin(k), "must be unregistered class");
1289 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
1290 info->_clsfile_size = cfs->length();
1291 info->_clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
1292 }
1293
1294 void SystemDictionaryShared::init_dumptime_info(InstanceKlass* k) {
1295 (void)find_or_allocate_info_for(k);
1296 }
1297
1298 void SystemDictionaryShared::remove_dumptime_info(InstanceKlass* k) {
1299 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
1300 DumpTimeSharedClassInfo* p = _dumptime_table->get(k);
1301 if (p == NULL) {
1302 return;
1303 }
1304 if (p->_verifier_constraints != NULL) {
1305 for (int i = 0; i < p->_verifier_constraints->length(); i++) {
1306 DumpTimeSharedClassInfo::DTVerifierConstraint constraint = p->_verifier_constraints->at(i);
1307 if (constraint._name != NULL ) {
1308 constraint._name->decrement_refcount();
1309 }
1310 if (constraint._from_name != NULL ) {
1311 constraint._from_name->decrement_refcount();
1312 }
1313 }
1314 FREE_C_HEAP_ARRAY(DumpTimeSharedClassInfo::DTVerifierConstraint, p->_verifier_constraints);
1315 p->_verifier_constraints = NULL;
1316 FREE_C_HEAP_ARRAY(char, p->_verifier_constraint_flags);
1317 p->_verifier_constraint_flags = NULL;
1318 }
1319 if (p->_loader_constraints != NULL) {
1320 for (int i = 0; i < p->_loader_constraints->length(); i++) {
1321 DumpTimeSharedClassInfo::DTLoaderConstraint ld = p->_loader_constraints->at(i);
1322 if (ld._name != NULL) {
1323 ld._name->decrement_refcount();
1324 }
1325 }
1326 FREE_C_HEAP_ARRAY(DumpTimeSharedClassInfo::DTLoaderConstraint, p->_loader_constraints);
1327 p->_loader_constraints = NULL;
1328 }
1329 _dumptime_table->remove(k);
1330 }
1331
1332 bool SystemDictionaryShared::is_jfr_event_class(InstanceKlass *k) {
1333 while (k) {
1334 if (k->name()->equals("jdk/internal/event/Event")) {
1335 return true;
1336 }
1337 k = k->java_super();
1338 }
1339 return false;
1340 }
1341
1342 bool SystemDictionaryShared::is_registered_lambda_proxy_class(InstanceKlass* ik) {
1343 DumpTimeSharedClassInfo* info = _dumptime_table->get(ik);
1344 return (info != NULL) ? info->_is_archived_lambda_proxy && !ik->is_non_strong_hidden() : false;
1345 }
1346
1347 bool SystemDictionaryShared::is_in_shared_lambda_proxy_table(InstanceKlass* ik) {
1348 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1349 RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(ik);
1350 if (record != NULL && record->nest_host() != NULL) {
1351 return true;
1352 } else {
1353 return false;
1354 }
1355 }
1356
1357 bool SystemDictionaryShared::is_hidden_lambda_proxy(InstanceKlass* ik) {
1358 assert(ik->is_shared(), "applicable to only a shared class");
1359 if (ik->is_hidden()) {
1360 assert(is_in_shared_lambda_proxy_table(ik), "we don't archive other hidden classes");
1361 return true;
1362 } else {
1363 return false;
1364 }
1365 }
1366
1367 void SystemDictionaryShared::warn_excluded(InstanceKlass* k, const char* reason) {
1368 ResourceMark rm;
1369 log_warning(cds)("Skipping %s: %s", k->name()->as_C_string(), reason);
1370 }
1371
1372 bool SystemDictionaryShared::should_be_excluded(InstanceKlass* k) {
1373
1374 if (k->is_unsafe_anonymous()) {
1375 warn_excluded(k, "Unsafe anonymous class");
1376 return true; // unsafe anonymous classes are not archived, skip
1377 }
1378
1379 if (k->is_in_error_state()) {
1380 warn_excluded(k, "In error state");
1381 return true;
1382 }
1383 if (k->has_been_redefined()) {
1384 warn_excluded(k, "Has been redefined");
1385 return true;
1386 }
1387 if (!k->is_hidden() && k->shared_classpath_index() < 0 && is_builtin(k)) {
1388 // These are classes loaded from unsupported locations (such as those loaded by JVMTI native
1389 // agent during dump time).
1390 warn_excluded(k, "Unsupported location");
1391 return true;
1392 }
1393 if (k->signers() != NULL) {
1394 // We cannot include signed classes in the archive because the certificates
1395 // used during dump time may be different than those used during
1396 // runtime (due to expiration, etc).
1397 warn_excluded(k, "Signed JAR");
1398 return true;
1399 }
1400 if (is_jfr_event_class(k)) {
1401 // We cannot include JFR event classes because they need runtime-specific
1402 // instrumentation in order to work with -XX:FlightRecorderOptions=retransform=false.
1403 // There are only a small number of these classes, so it's not worthwhile to
1404 // support them and make CDS more complicated.
1405 warn_excluded(k, "JFR event class");
1406 return true;
1407 }
1408 if (k->init_state() < InstanceKlass::linked) {
1409 // In CDS dumping, we will attempt to link all classes. Those that fail to link will
1410 // be recorded in DumpTimeSharedClassInfo.
1411 Arguments::assert_is_dumping_archive();
1412
1413 // TODO -- rethink how this can be handled.
1414 // We should try to link ik, however, we can't do it here because
1415 // 1. We are at VM exit
1416 // 2. linking a class may cause other classes to be loaded, which means
1417 // a custom ClassLoader.loadClass() may be called, at a point where the
1418 // class loader doesn't expect it.
1419 if (has_class_failed_verification(k)) {
1420 warn_excluded(k, "Failed verification");
1421 } else {
1422 warn_excluded(k, "Not linked");
1423 }
1424 return true;
1425 }
1426 if (k->major_version() < 50 /*JAVA_6_VERSION*/) {
1427 ResourceMark rm;
1428 log_warning(cds)("Pre JDK 6 class not supported by CDS: %u.%u %s",
1429 k->major_version(), k->minor_version(), k->name()->as_C_string());
1430 return true;
1431 }
1432
1433 InstanceKlass* super = k->java_super();
1434 if (super != NULL && should_be_excluded(super)) {
1435 ResourceMark rm;
1436 log_warning(cds)("Skipping %s: super class %s is excluded", k->name()->as_C_string(), super->name()->as_C_string());
1437 return true;
1438 }
1439
1440 if (k->is_hidden() && !is_registered_lambda_proxy_class(k)) {
1441 warn_excluded(k, "Hidden class");
1442 return true;
1443 }
1444
1445 Array<InstanceKlass*>* interfaces = k->local_interfaces();
1446 int len = interfaces->length();
1447 for (int i = 0; i < len; i++) {
1448 InstanceKlass* intf = interfaces->at(i);
1449 if (should_be_excluded(intf)) {
1450 log_warning(cds)("Skipping %s: interface %s is excluded", k->name()->as_C_string(), intf->name()->as_C_string());
1451 return true;
1452 }
1453 }
1454
1455 return false;
1456 }
1457
1458 // k is a class before relocating by ArchiveCompactor
1459 void SystemDictionaryShared::validate_before_archiving(InstanceKlass* k) {
1460 ResourceMark rm;
1461 const char* name = k->name()->as_C_string();
1462 DumpTimeSharedClassInfo* info = _dumptime_table->get(k);
1463 assert(_no_class_loading_should_happen, "class loading must be disabled");
1464 guarantee(info != NULL, "Class %s must be entered into _dumptime_table", name);
1465 guarantee(!info->is_excluded(), "Should not attempt to archive excluded class %s", name);
1466 if (is_builtin(k)) {
1467 if (k->is_hidden()) {
1468 assert(is_registered_lambda_proxy_class(k), "unexpected hidden class %s", name);
1469 }
1470 guarantee(!k->is_shared_unregistered_class(),
1471 "Class loader type must be set for BUILTIN class %s", name);
1472
1473 } else {
1474 guarantee(k->is_shared_unregistered_class(),
1475 "Class loader type must not be set for UNREGISTERED class %s", name);
1476 }
1477 }
1478
1479 class ExcludeDumpTimeSharedClasses : StackObj {
1480 public:
1481 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
1482 if (SystemDictionaryShared::should_be_excluded(k)) {
1483 info.set_excluded();
1484 }
1485 return true; // keep on iterating
1486 }
1487 };
1488
1489 void SystemDictionaryShared::check_excluded_classes() {
1490 ExcludeDumpTimeSharedClasses excl;
1491 _dumptime_table->iterate(&excl);
1492 _dumptime_table->update_counts();
1493 }
1494
1495 bool SystemDictionaryShared::is_excluded_class(InstanceKlass* k) {
1496 assert(_no_class_loading_should_happen, "sanity");
1497 Arguments::assert_is_dumping_archive();
1498 return find_or_allocate_info_for(k)->is_excluded();
1499 }
1500
1501 void SystemDictionaryShared::set_class_has_failed_verification(InstanceKlass* ik) {
1502 Arguments::assert_is_dumping_archive();
1503 find_or_allocate_info_for(ik)->set_failed_verification();
1504 }
1505
1506 bool SystemDictionaryShared::has_class_failed_verification(InstanceKlass* ik) {
1507 Arguments::assert_is_dumping_archive();
1508 if (_dumptime_table == NULL) {
1509 assert(DynamicDumpSharedSpaces, "sanity");
1510 assert(ik->is_shared(), "must be a shared class in the static archive");
1511 return false;
1512 }
1513 DumpTimeSharedClassInfo* p = _dumptime_table->get(ik);
1514 return (p == NULL) ? false : p->failed_verification();
1515 }
1516
1517 class IterateDumpTimeSharedClassTable : StackObj {
1518 MetaspaceClosure *_it;
1519 public:
1520 IterateDumpTimeSharedClassTable(MetaspaceClosure* it) : _it(it) {}
1521
1522 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
1523 if (!info.is_excluded()) {
1524 info.metaspace_pointers_do(_it);
1525 }
1526 return true; // keep on iterating
1527 }
1528 };
1529
1530 void SystemDictionaryShared::dumptime_classes_do(class MetaspaceClosure* it) {
1531 IterateDumpTimeSharedClassTable iter(it);
1532 _dumptime_table->iterate(&iter);
1533 }
1534
1535 bool SystemDictionaryShared::add_verification_constraint(InstanceKlass* k, Symbol* name,
1536 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
1537 Arguments::assert_is_dumping_archive();
1538 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
1539 info->add_verification_constraint(k, name, from_name, from_field_is_protected,
1540 from_is_array, from_is_object);
1541
1542 if (DynamicDumpSharedSpaces) {
1543 // For dynamic dumping, we can resolve all the constraint classes for all class loaders during
1544 // the initial run prior to creating the archive before vm exit. We will also perform verification
1545 // check when running with the archive.
1546 return false;
1547 } else {
1548 if (is_builtin(k)) {
1549 // For builtin class loaders, we can try to complete the verification check at dump time,
1550 // because we can resolve all the constraint classes. We will also perform verification check
1551 // when running with the archive.
1552 return false;
1553 } else {
1554 // For non-builtin class loaders, we cannot complete the verification check at dump time,
1555 // because at dump time we don't know how to resolve classes for such loaders.
1556 return true;
1557 }
1558 }
1559 }
1560
1561 void DumpTimeSharedClassInfo::add_verification_constraint(InstanceKlass* k, Symbol* name,
1562 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
1563 if (_verifier_constraints == NULL) {
1564 _verifier_constraints = new(ResourceObj::C_HEAP, mtClass) GrowableArray<DTVerifierConstraint>(4, true, mtClass);
1565 }
1566 if (_verifier_constraint_flags == NULL) {
1567 _verifier_constraint_flags = new(ResourceObj::C_HEAP, mtClass) GrowableArray<char>(4, true, mtClass);
1568 }
1569 GrowableArray<DTVerifierConstraint>* vc_array = _verifier_constraints;
1570 for (int i = 0; i < vc_array->length(); i++) {
1571 DTVerifierConstraint* p = vc_array->adr_at(i);
1572 if (name == p->_name && from_name == p->_from_name) {
1573 return;
1574 }
1575 }
1576 DTVerifierConstraint cons(name, from_name);
1577 vc_array->append(cons);
1578
1579 GrowableArray<char>* vcflags_array = _verifier_constraint_flags;
1580 char c = 0;
1581 c |= from_field_is_protected ? SystemDictionaryShared::FROM_FIELD_IS_PROTECTED : 0;
1582 c |= from_is_array ? SystemDictionaryShared::FROM_IS_ARRAY : 0;
1583 c |= from_is_object ? SystemDictionaryShared::FROM_IS_OBJECT : 0;
1584 vcflags_array->append(c);
1585
1586 if (log_is_enabled(Trace, cds, verification)) {
1587 ResourceMark rm;
1588 log_trace(cds, verification)("add_verification_constraint: %s: %s must be subclass of %s [0x%x] array len %d flags len %d",
1589 k->external_name(), from_name->as_klass_external_name(),
1590 name->as_klass_external_name(), c, vc_array->length(), vcflags_array->length());
1591 }
1592 }
1593
1594 void SystemDictionaryShared::add_lambda_proxy_class(InstanceKlass* caller_ik,
1595 InstanceKlass* lambda_ik,
1596 Symbol* invoked_name,
1597 Symbol* invoked_type,
1598 Symbol* method_type,
1599 Method* member_method,
1600 Symbol* instantiated_method_type) {
1601
1602 assert(caller_ik->class_loader() == lambda_ik->class_loader(), "mismatched class loader");
1603 assert(caller_ik->class_loader_data() == lambda_ik->class_loader_data(), "mismatched class loader data");
1604
1605 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
1606
1607 lambda_ik->assign_class_loader_type();
1608
1609 DumpTimeSharedClassInfo* info = _dumptime_table->get(lambda_ik);
1610 if (info != NULL) {
1611 // Set _is_archived_lambda_proxy in DumpTimeSharedClassInfo so that the lambda_ik
1612 // won't be excluded during dumping of shared archive. See ExcludeDumpTimeSharedClasses.
1613 info->_is_archived_lambda_proxy = true;
1614 }
1615
1616 LambdaProxyClassKey key(caller_ik,
1617 invoked_name,
1618 invoked_type,
1619 method_type,
1620 member_method,
1621 instantiated_method_type);
1622 add_to_dump_time_lambda_proxy_class_dictionary(key, lambda_ik);
1623 }
1624
1625 InstanceKlass* SystemDictionaryShared::get_shared_lambda_proxy_class(InstanceKlass* caller_ik,
1626 Symbol* invoked_name,
1627 Symbol* invoked_type,
1628 Symbol* method_type,
1629 Method* member_method,
1630 Symbol* instantiated_method_type) {
1631 MutexLocker ml(CDSLambda_lock, Mutex::_no_safepoint_check_flag);
1632 LambdaProxyClassKey key(caller_ik, invoked_name, invoked_type,
1633 method_type, member_method, instantiated_method_type);
1634 const RunTimeLambdaProxyClassInfo* info = _lambda_proxy_class_dictionary.lookup(&key, key.hash(), 0);
1635 InstanceKlass* proxy_klass = NULL;
1636 if (info != NULL) {
1637 InstanceKlass* curr_klass = info->proxy_klass();
1638 InstanceKlass* prev_klass = curr_klass;
1639 if (curr_klass->lambda_proxy_is_available()) {
1640 while (curr_klass->next_link() != NULL) {
1641 prev_klass = curr_klass;
1642 curr_klass = InstanceKlass::cast(curr_klass->next_link());
1643 }
1644 assert(curr_klass->is_hidden(), "must be");
1645 assert(curr_klass->lambda_proxy_is_available(), "must be");
1646
1647 prev_klass->set_next_link(NULL);
1648 proxy_klass = curr_klass;
1649 proxy_klass->clear_lambda_proxy_is_available();
1650 if (log_is_enabled(Debug, cds)) {
1651 ResourceMark rm;
1652 log_debug(cds)("Loaded lambda proxy: %s", proxy_klass->external_name());
1653 }
1654 } else {
1655 if (log_is_enabled(Debug, cds)) {
1656 ResourceMark rm;
1657 log_debug(cds)("Used all archived lambda proxy classes for: %s %s%s",
1658 caller_ik->external_name(), invoked_name->as_C_string(), invoked_type->as_C_string());
1659 }
1660 }
1661 }
1662 return proxy_klass;
1663 }
1664
1665 InstanceKlass* SystemDictionaryShared::get_shared_nest_host(InstanceKlass* lambda_ik) {
1666 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1667 RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(lambda_ik);
1668 return record->nest_host();
1669 }
1670
1671 InstanceKlass* SystemDictionaryShared::prepare_shared_lambda_proxy_class(InstanceKlass* lambda_ik,
1672 InstanceKlass* caller_ik,
1673 bool initialize, TRAPS) {
1674 Handle class_loader(THREAD, caller_ik->class_loader());
1675 Handle protection_domain;
1676 PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, caller_ik->name());
1677 if (caller_ik->class_loader() != NULL) {
1678 protection_domain = SystemDictionaryShared::init_security_info(class_loader, caller_ik, pkg_entry, CHECK_NULL);
1679 }
1680
1681 InstanceKlass* shared_nest_host = get_shared_nest_host(lambda_ik);
1682 assert(shared_nest_host != NULL, "unexpected NULL _nest_host");
1683
1684 InstanceKlass* loaded_lambda =
1685 SystemDictionary::load_shared_lambda_proxy_class(lambda_ik, class_loader, protection_domain, pkg_entry, CHECK_NULL);
1686
1687 // Ensures the nest host is the same as the lambda proxy's
1688 // nest host recorded at dump time.
1689 InstanceKlass* nest_host = caller_ik->nest_host(THREAD);
1690 assert(nest_host == shared_nest_host, "mismatched nest host");
1691
1692 EventClassLoad class_load_start_event;
1693 {
1694 MutexLocker mu_r(THREAD, Compile_lock);
1695
1696 // Add to class hierarchy, initialize vtables, and do possible
1697 // deoptimizations.
1698 SystemDictionary::add_to_hierarchy(loaded_lambda, CHECK_NULL); // No exception, but can block
1699 // But, do not add to dictionary.
1700 }
1701 loaded_lambda->link_class(CHECK_NULL);
1702 // notify jvmti
1703 if (JvmtiExport::should_post_class_load()) {
1704 assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
1705 JvmtiExport::post_class_load((JavaThread *) THREAD, loaded_lambda);
1706 }
1707 if (class_load_start_event.should_commit()) {
1708 SystemDictionary::post_class_load_event(&class_load_start_event, loaded_lambda, ClassLoaderData::class_loader_data(class_loader()));
1709 }
1710
1711 if (initialize) {
1712 loaded_lambda->initialize(CHECK_NULL);
1713 }
1714
1715 return loaded_lambda;
1716 }
1717
1718 static char get_loader_type_by(oop loader) {
1719 assert(SystemDictionary::is_builtin_class_loader(loader), "Must be built-in loader");
1720 if (SystemDictionary::is_boot_class_loader(loader)) {
1721 return (char)ClassLoader::BOOT_LOADER;
1722 } else if (SystemDictionary::is_platform_class_loader(loader)) {
1723 return (char)ClassLoader::PLATFORM_LOADER;
1724 } else {
1725 assert(SystemDictionary::is_system_class_loader(loader), "Class loader mismatch");
1726 return (char)ClassLoader::APP_LOADER;
1727 }
1728 }
1729
1730 static oop get_class_loader_by(char type) {
1731 if (type == (char)ClassLoader::BOOT_LOADER) {
1732 return (oop)NULL;
1733 } else if (type == (char)ClassLoader::PLATFORM_LOADER) {
1734 return SystemDictionary::java_platform_loader();
1735 } else {
1736 assert (type == (char)ClassLoader::APP_LOADER, "Sanity");
1737 return SystemDictionary::java_system_loader();
1738 }
1739 }
1740
1741 void DumpTimeSharedClassInfo::record_linking_constraint(Symbol* name, Handle loader1, Handle loader2) {
1742 assert(loader1 != loader2, "sanity");
1743 LogTarget(Info, class, loader, constraints) log;
1744 if (_loader_constraints == NULL) {
1745 _loader_constraints = new (ResourceObj::C_HEAP, mtClass) GrowableArray<DTLoaderConstraint>(4, true, mtClass);
1746 }
1747 char lt1 = get_loader_type_by(loader1());
1748 char lt2 = get_loader_type_by(loader2());
1749 DTLoaderConstraint lc(name, lt1, lt2);
1750 for (int i = 0; i < _loader_constraints->length(); i++) {
1751 DTLoaderConstraint dt = _loader_constraints->at(i);
1752 if (lc.equals(dt)) {
1753 if (log.is_enabled()) {
1754 ResourceMark rm;
1755 // Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
1756 log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s already added]",
1757 _klass->external_name(), name->as_C_string(),
1758 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1759 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
1760 }
1761 return;
1762 }
1763 }
1764 _loader_constraints->append(lc);
1765 if (log.is_enabled()) {
1766 ResourceMark rm;
1767 // Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
1768 log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s total %d]",
1769 _klass->external_name(), name->as_C_string(),
1770 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1771 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id(),
1772 _loader_constraints->length());
1773 }
1774 }
1775
1776 void SystemDictionaryShared::check_verification_constraints(InstanceKlass* klass,
1777 TRAPS) {
1778 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1779 RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(klass);
1780
1781 int length = record->_num_verifier_constraints;
1782 if (length > 0) {
1783 for (int i = 0; i < length; i++) {
1784 RunTimeSharedClassInfo::RTVerifierConstraint* vc = record->verifier_constraint_at(i);
1785 Symbol* name = vc->name();
1786 Symbol* from_name = vc->from_name();
1787 char c = record->verifier_constraint_flag(i);
1788
1789 if (log_is_enabled(Trace, cds, verification)) {
1790 ResourceMark rm(THREAD);
1791 log_trace(cds, verification)("check_verification_constraint: %s: %s must be subclass of %s [0x%x]",
1792 klass->external_name(), from_name->as_klass_external_name(),
1793 name->as_klass_external_name(), c);
1794 }
1795
1796 bool from_field_is_protected = (c & SystemDictionaryShared::FROM_FIELD_IS_PROTECTED) ? true : false;
1797 bool from_is_array = (c & SystemDictionaryShared::FROM_IS_ARRAY) ? true : false;
1798 bool from_is_object = (c & SystemDictionaryShared::FROM_IS_OBJECT) ? true : false;
1799
1800 bool ok = VerificationType::resolve_and_check_assignability(klass, name,
1801 from_name, from_field_is_protected, from_is_array, from_is_object, CHECK);
1802 if (!ok) {
1803 ResourceMark rm(THREAD);
1804 stringStream ss;
1805
1806 ss.print_cr("Bad type on operand stack");
1807 ss.print_cr("Exception Details:");
1808 ss.print_cr(" Location:\n %s", klass->name()->as_C_string());
1809 ss.print_cr(" Reason:\n Type '%s' is not assignable to '%s'",
1810 from_name->as_quoted_ascii(), name->as_quoted_ascii());
1811 THROW_MSG(vmSymbols::java_lang_VerifyError(), ss.as_string());
1812 }
1813 }
1814 }
1815 }
1816
1817 // Record class loader constraints that are checked inside
1818 // InstanceKlass::link_class(), so that these can be checked quickly
1819 // at runtime without laying out the vtable/itables.
1820 void SystemDictionaryShared::record_linking_constraint(Symbol* name, InstanceKlass* klass,
1821 Handle loader1, Handle loader2, TRAPS) {
1822 // A linking constraint check is executed when:
1823 // - klass extends or implements type S
1824 // - klass overrides method S.M(...) with X.M
1825 // - If klass defines the method M, X is
1826 // the same as klass.
1827 // - If klass does not define the method M,
1828 // X must be a supertype of klass and X.M is
1829 // a default method defined by X.
1830 // - loader1 = X->class_loader()
1831 // - loader2 = S->class_loader()
1832 // - loader1 != loader2
1833 // - M's paramater(s) include an object type T
1834 // We require that
1835 // - whenever loader1 and loader2 try to
1836 // resolve the type T, they must always resolve to
1837 // the same InstanceKlass.
1838 // NOTE: type T may or may not be currently resolved in
1839 // either of these two loaders. The check itself does not
1840 // try to resolve T.
1841 oop klass_loader = klass->class_loader();
1842 assert(klass_loader != NULL, "should not be called for boot loader");
1843 assert(loader1 != loader2, "must be");
1844
1845 if (!is_system_class_loader(klass_loader) &&
1846 !is_platform_class_loader(klass_loader)) {
1847 // If klass is loaded by system/platform loaders, we can
1848 // guarantee that klass and S must be loaded by the same
1849 // respective loader between dump time and run time, and
1850 // the exact same check on (name, loader1, loader2) will
1851 // be executed. Hence, we can cache this check and execute
1852 // it at runtime without walking the vtable/itables.
1853 //
1854 // This cannot be guaranteed for classes loaded by other
1855 // loaders, so we bail.
1856 return;
1857 }
1858
1859 if (THREAD->is_VM_thread()) {
1860 assert(DynamicDumpSharedSpaces, "must be");
1861 // We are re-laying out the vtable/itables of the *copy* of
1862 // a class during the final stage of dynamic dumping. The
1863 // linking constraints for this class has already been recorded.
1864 return;
1865 }
1866 Arguments::assert_is_dumping_archive();
1867 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(klass);
1868 info->record_linking_constraint(name, loader1, loader2);
1869 }
1870
1871 // returns true IFF there's no need to re-initialize the i/v-tables for klass for
1872 // the purpose of checking class loader constraints.
1873 bool SystemDictionaryShared::check_linking_constraints(InstanceKlass* klass, TRAPS) {
1874 assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
1875 LogTarget(Info, class, loader, constraints) log;
1876 if (klass->is_shared_boot_class()) {
1877 // No class loader constraint check performed for boot classes.
1878 return true;
1879 }
1880 if (klass->is_shared_platform_class() || klass->is_shared_app_class()) {
1881 RunTimeSharedClassInfo* info = RunTimeSharedClassInfo::get_for(klass);
1882 assert(info != NULL, "Sanity");
1883 if (info->_num_loader_constraints > 0) {
1884 HandleMark hm;
1885 for (int i = 0; i < info->_num_loader_constraints; i++) {
1886 RunTimeSharedClassInfo::RTLoaderConstraint* lc = info->loader_constraint_at(i);
1887 Symbol* name = lc->constraint_name();
1888 Handle loader1(THREAD, get_class_loader_by(lc->_loader_type1));
1889 Handle loader2(THREAD, get_class_loader_by(lc->_loader_type2));
1890 if (log.is_enabled()) {
1891 ResourceMark rm(THREAD);
1892 log.print("[CDS add loader constraint for class %s symbol %s loader[0] %s loader[1] %s",
1893 klass->external_name(), name->as_C_string(),
1894 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
1895 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
1896 }
1897 if (!SystemDictionary::add_loader_constraint(name, klass, loader1, loader2, THREAD)) {
1898 // Loader constraint violation has been found. The caller
1899 // will re-layout the vtable/itables to produce the correct
1900 // exception.
1901 if (log.is_enabled()) {
1902 log.print(" failed]");
1903 }
1904 return false;
1905 }
1906 if (log.is_enabled()) {
1907 log.print(" succeeded]");
1908 }
1909 }
1910 return true; // for all recorded constraints added successully.
1911 }
1912 }
1913 if (log.is_enabled()) {
1914 ResourceMark rm(THREAD);
1915 log.print("[CDS has not recorded loader constraint for class %s]", klass->external_name());
1916 }
1917 return false;
1918 }
1919
1920 class EstimateSizeForArchive : StackObj {
1921 size_t _shared_class_info_size;
1922 int _num_builtin_klasses;
1923 int _num_unregistered_klasses;
1924
1925 public:
1926 EstimateSizeForArchive() {
1927 _shared_class_info_size = 0;
1928 _num_builtin_klasses = 0;
1929 _num_unregistered_klasses = 0;
1930 }
1931
1932 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
1933 if (!info.is_excluded()) {
1934 size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
1935 _shared_class_info_size += align_up(byte_size, BytesPerWord);
1936 }
1937 return true; // keep on iterating
1938 }
1939
1940 size_t total() {
1941 return _shared_class_info_size;
1942 }
1943 };
1944
1945 size_t SystemDictionaryShared::estimate_size_for_archive() {
1946 EstimateSizeForArchive est;
1947 _dumptime_table->iterate(&est);
1948 size_t total_size = est.total() +
1949 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(true)) +
1950 CompactHashtableWriter::estimate_size(_dumptime_table->count_of(false));
1951 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
1952 total_size +=
1953 (sizeof(RunTimeLambdaProxyClassInfo) * _dumptime_lambda_proxy_class_dictionary->_count) +
1954 CompactHashtableWriter::estimate_size(_dumptime_lambda_proxy_class_dictionary->_count);
1955 } else {
1956 total_size += CompactHashtableWriter::estimate_size(0);
1957 }
1958 return total_size;
1959 }
1960
1961 class CopyLambdaProxyClassInfoToArchive : StackObj {
1962 CompactHashtableWriter* _writer;
1963 public:
1964 CopyLambdaProxyClassInfoToArchive(CompactHashtableWriter* writer)
1965 : _writer(writer) {}
1966 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1967 if (SystemDictionaryShared::is_excluded_class(info._proxy_klass->at(0))) {
1968 return true;
1969 }
1970 ResourceMark rm;
1971 log_info(cds,dynamic)("Archiving hidden %s", info._proxy_klass->at(0)->external_name());
1972 size_t byte_size = sizeof(RunTimeLambdaProxyClassInfo);
1973 RunTimeLambdaProxyClassInfo* runtime_info =
1974 (RunTimeLambdaProxyClassInfo*)MetaspaceShared::read_only_space_alloc(byte_size);
1975 runtime_info->init(key, info);
1976 unsigned int hash = runtime_info->hash(); // Fields in runtime_info->_key already point to target space.
1977 u4 delta = MetaspaceShared::object_delta_u4(DynamicArchive::buffer_to_target(runtime_info));
1978 _writer->add(hash, delta);
1979 return true;
1980 }
1981 };
1982
1983 class AdjustLambdaProxyClassInfo : StackObj {
1984 public:
1985 AdjustLambdaProxyClassInfo() {}
1986 bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
1987 if (SystemDictionaryShared::is_excluded_class(info._proxy_klass->at(0))) {
1988 return true;
1989 }
1990 int len = info._proxy_klass->length();
1991 if (len > 1) {
1992 for (int i = 0; i < len-1; i++) {
1993 InstanceKlass* ok0 = info._proxy_klass->at(i+0); // this is original klass
1994 InstanceKlass* ok1 = info._proxy_klass->at(i+1); // this is original klass
1995 InstanceKlass* bk0 = DynamicArchive::original_to_buffer(ok0);
1996 InstanceKlass* bk1 = DynamicArchive::original_to_buffer(ok1);
1997 assert(bk0->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
1998 assert(bk1->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
1999 bk0->set_next_link(bk1);
2000 bk1->set_lambda_proxy_is_available();
2001 ArchivePtrMarker::mark_pointer(bk0->next_link_addr());
2002 }
2003 }
2004 DynamicArchive::original_to_buffer(info._proxy_klass->at(0))->set_lambda_proxy_is_available();
2005 return true;
2006 }
2007 };
2008
2009 class CopySharedClassInfoToArchive : StackObj {
2010 CompactHashtableWriter* _writer;
2011 bool _is_builtin;
2012 public:
2013 CopySharedClassInfoToArchive(CompactHashtableWriter* writer,
2014 bool is_builtin,
2015 bool is_static_archive)
2016 : _writer(writer), _is_builtin(is_builtin) {}
2017
2018 bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
2019 if (!info.is_excluded() && info.is_builtin() == _is_builtin) {
2020 size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
2021 RunTimeSharedClassInfo* record;
2022 record = (RunTimeSharedClassInfo*)MetaspaceShared::read_only_space_alloc(byte_size);
2023 record->init(info);
2024
2025 unsigned int hash;
2026 Symbol* name = info._klass->name();
2027 if (DynamicDumpSharedSpaces) {
2028 name = DynamicArchive::original_to_target(name);
2029 }
2030 hash = SystemDictionaryShared::hash_for_shared_dictionary(name);
2031 u4 delta;
2032 if (DynamicDumpSharedSpaces) {
2033 delta = MetaspaceShared::object_delta_u4(DynamicArchive::buffer_to_target(record));
2034 } else {
2035 delta = MetaspaceShared::object_delta_u4(record);
2036 }
2037 if (_is_builtin && info._klass->is_hidden()) {
2038 // skip
2039 } else {
2040 _writer->add(hash, delta);
2041 }
2042 if (log_is_enabled(Trace, cds, hashtables)) {
2043 ResourceMark rm;
2044 log_trace(cds,hashtables)("%s dictionary: %s", (_is_builtin ? "builtin" : "unregistered"), info._klass->external_name());
2045 }
2046
2047 // Save this for quick runtime lookup of InstanceKlass* -> RunTimeSharedClassInfo*
2048 RunTimeSharedClassInfo::set_for(info._klass, record);
2049 }
2050 return true; // keep on iterating
2051 }
2052 };
2053
2054 void SystemDictionaryShared::write_lambda_proxy_class_dictionary(LambdaProxyClassDictionary *dictionary) {
2055 CompactHashtableStats stats;
2056 dictionary->reset();
2057 CompactHashtableWriter writer(_dumptime_lambda_proxy_class_dictionary->_count, &stats);
2058 CopyLambdaProxyClassInfoToArchive copy(&writer);
2059 _dumptime_lambda_proxy_class_dictionary->iterate(©);
2060 writer.dump(dictionary, "lambda proxy class dictionary");
2061 }
2062
2063 void SystemDictionaryShared::write_dictionary(RunTimeSharedDictionary* dictionary,
2064 bool is_builtin,
2065 bool is_static_archive) {
2066 CompactHashtableStats stats;
2067 dictionary->reset();
2068 CompactHashtableWriter writer(_dumptime_table->count_of(is_builtin), &stats);
2069 CopySharedClassInfoToArchive copy(&writer, is_builtin, is_static_archive);
2070 _dumptime_table->iterate(©);
2071 writer.dump(dictionary, is_builtin ? "builtin dictionary" : "unregistered dictionary");
2072 }
2073
2074 void SystemDictionaryShared::write_to_archive(bool is_static_archive) {
2075 if (is_static_archive) {
2076 write_dictionary(&_builtin_dictionary, true);
2077 write_dictionary(&_unregistered_dictionary, false);
2078 } else {
2079 write_dictionary(&_dynamic_builtin_dictionary, true);
2080 write_dictionary(&_dynamic_unregistered_dictionary, false);
2081 }
2082 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
2083 write_lambda_proxy_class_dictionary(&_lambda_proxy_class_dictionary);
2084 }
2085 }
2086
2087 void SystemDictionaryShared::adjust_lambda_proxy_class_dictionary() {
2088 if (_dumptime_lambda_proxy_class_dictionary != NULL) {
2089 AdjustLambdaProxyClassInfo adjuster;
2090 _dumptime_lambda_proxy_class_dictionary->iterate(&adjuster);
2091 }
2092 }
2093
2094 void SystemDictionaryShared::serialize_dictionary_headers(SerializeClosure* soc,
2095 bool is_static_archive) {
2096 if (is_static_archive) {
2097 _builtin_dictionary.serialize_header(soc);
2098 _unregistered_dictionary.serialize_header(soc);
2099 } else {
2100 _dynamic_builtin_dictionary.serialize_header(soc);
2101 _dynamic_unregistered_dictionary.serialize_header(soc);
2102 _lambda_proxy_class_dictionary.serialize_header(soc);
2103 }
2104 }
2105
2106 void SystemDictionaryShared::serialize_well_known_klasses(SerializeClosure* soc) {
2107 for (int i = FIRST_WKID; i < WKID_LIMIT; i++) {
2108 soc->do_ptr((void**)&_well_known_klasses[i]);
2109 }
2110 }
2111
2112 const RunTimeSharedClassInfo*
2113 SystemDictionaryShared::find_record(RunTimeSharedDictionary* static_dict, RunTimeSharedDictionary* dynamic_dict, Symbol* name) {
2114 if (!UseSharedSpaces || !name->is_shared()) {
2115 // The names of all shared classes must also be a shared Symbol.
2116 return NULL;
2117 }
2118
2119 unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary(name);
2120 const RunTimeSharedClassInfo* record = NULL;
2121 if (!MetaspaceShared::is_shared_dynamic(name)) {
2122 // The names of all shared classes in the static dict must also be in the
2123 // static archive
2124 record = static_dict->lookup(name, hash, 0);
2125 }
2126
2127 if (record == NULL && DynamicArchive::is_mapped()) {
2128 record = dynamic_dict->lookup(name, hash, 0);
2129 }
2130
2131 return record;
2132 }
2133
2134 InstanceKlass* SystemDictionaryShared::find_builtin_class(Symbol* name) {
2135 const RunTimeSharedClassInfo* record = find_record(&_builtin_dictionary, &_dynamic_builtin_dictionary, name);
2136 if (record != NULL) {
2137 assert(!record->_klass->is_hidden(), "hidden class cannot be looked up by name");
2138 return record->_klass;
2139 } else {
2140 return NULL;
2141 }
2142 }
2143
2144 void SystemDictionaryShared::update_shared_entry(InstanceKlass* k, int id) {
2145 assert(DumpSharedSpaces, "supported only when dumping");
2146 DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
2147 info->_id = id;
2148 }
2149
2150 class SharedDictionaryPrinter : StackObj {
2151 outputStream* _st;
2152 int _index;
2153 public:
2154 SharedDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
2155
2156 void do_value(const RunTimeSharedClassInfo* record) {
2157 ResourceMark rm;
2158 _st->print_cr("%4d: %s", (_index++), record->_klass->external_name());
2159 }
2160 };
2161
2162 class SharedLambdaDictionaryPrinter : StackObj {
2163 outputStream* _st;
2164 int _index;
2165 public:
2166 SharedLambdaDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
2167
2168 void do_value(const RunTimeLambdaProxyClassInfo* record) {
2169 ResourceMark rm;
2170 _st->print_cr("%4d: %s", (_index++), record->proxy_klass()->external_name());
2171 Klass* k = record->proxy_klass()->next_link();
2172 while (k != NULL) {
2173 _st->print_cr("%4d: %s", (_index++), k->external_name());
2174 k = k->next_link();
2175 }
2176 }
2177 };
2178
2179 void SystemDictionaryShared::print_on(outputStream* st) {
2180 if (UseSharedSpaces) {
2181 st->print_cr("Shared Dictionary");
2182 SharedDictionaryPrinter p(st);
2183 _builtin_dictionary.iterate(&p);
2184 _unregistered_dictionary.iterate(&p);
2185 if (DynamicArchive::is_mapped()) {
2186 _dynamic_builtin_dictionary.iterate(&p);
2187 _unregistered_dictionary.iterate(&p);
2188 if (!_lambda_proxy_class_dictionary.empty()) {
2189 st->print_cr("Shared Lambda Dictionary");
2190 SharedLambdaDictionaryPrinter ldp(st);
2191 _lambda_proxy_class_dictionary.iterate(&ldp);
2192 }
2193 }
2194 }
2195 }
2196
2197 void SystemDictionaryShared::print_table_statistics(outputStream* st) {
2198 if (UseSharedSpaces) {
2199 _builtin_dictionary.print_table_statistics(st, "Builtin Shared Dictionary");
2200 _unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
2201 if (DynamicArchive::is_mapped()) {
2202 _dynamic_builtin_dictionary.print_table_statistics(st, "Dynamic Builtin Shared Dictionary");
2203 _dynamic_unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
2204 _lambda_proxy_class_dictionary.print_table_statistics(st, "Lambda Shared Dictionary");
2205 }
2206 }
2207 }
2208
2209 bool SystemDictionaryShared::empty_dumptime_table() {
2210 if (_dumptime_table == NULL) {
2211 return true;
2212 }
2213 _dumptime_table->update_counts();
2214 if (_dumptime_table->count_of(true) == 0 && _dumptime_table->count_of(false) == 0){
2215 return true;
2216 }
2217 return false;
2218 }
2219
2220 #if INCLUDE_CDS_JAVA_HEAP
2221
2222 class ArchivedMirrorPatcher {
2223 static void update(Klass* k) {
2224 if (k->has_raw_archived_mirror()) {
2225 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
2226 if (m != NULL) {
2227 java_lang_Class::update_archived_mirror_native_pointers(m);
2228 }
2229 }
2230 }
2231
2232 public:
2233 static void update_array_klasses(Klass* ak) {
2234 while (ak != NULL) {
2235 update(ak);
2236 ak = ArrayKlass::cast(ak)->higher_dimension();
2237 }
2238 }
2239
2240 void do_value(const RunTimeSharedClassInfo* info) {
2241 InstanceKlass* ik = info->_klass;
2242 update(ik);
2243 update_array_klasses(ik->array_klasses());
2244 }
2245 };
2246
2247 void SystemDictionaryShared::update_archived_mirror_native_pointers_for(RunTimeSharedDictionary* dict) {
2248 ArchivedMirrorPatcher patcher;
2249 dict->iterate(&patcher);
2250 }
2251
2252 void SystemDictionaryShared::update_archived_mirror_native_pointers() {
2253 if (!HeapShared::open_archive_heap_region_mapped()) {
2254 return;
2255 }
2256 if (MetaspaceShared::relocation_delta() == 0) {
2257 return;
2258 }
2259 update_archived_mirror_native_pointers_for(&_builtin_dictionary);
2260 update_archived_mirror_native_pointers_for(&_unregistered_dictionary);
2261
2262 for (int t = T_BOOLEAN; t <= T_LONG; t++) {
2263 Klass* k = Universe::typeArrayKlassObj((BasicType)t);
2264 ArchivedMirrorPatcher::update_array_klasses(k);
2265 }
2266 }
2267 #endif