1 /*
2 * Copyright (c) 2019, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/aotClassLinker.hpp"
27 #include "cds/archiveBuilder.hpp"
28 #include "cds/archiveHeapWriter.hpp"
29 #include "cds/archiveUtils.inline.hpp"
30 #include "cds/cds_globals.hpp"
31 #include "cds/cdsConfig.hpp"
32 #include "cds/dynamicArchive.hpp"
33 #include "cds/metaspaceShared.hpp"
34 #include "cds/regeneratedClasses.hpp"
35 #include "classfile/classLoader.hpp"
36 #include "classfile/classLoaderData.inline.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionaryShared.hpp"
39 #include "classfile/vmSymbols.hpp"
40 #include "gc/shared/collectedHeap.hpp"
41 #include "gc/shared/gcVMOperations.hpp"
42 #include "gc/shared/gc_globals.hpp"
43 #include "jvm.h"
44 #include "logging/log.hpp"
45 #include "memory/metaspaceClosure.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "oops/klass.inline.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/os.hpp"
50 #include "runtime/sharedRuntime.hpp"
51 #include "runtime/vmOperations.hpp"
52 #include "runtime/vmThread.hpp"
53 #include "utilities/align.hpp"
54 #include "utilities/bitMap.inline.hpp"
55
56
57 class DynamicArchiveBuilder : public ArchiveBuilder {
58 const char* _archive_name;
59 public:
60 DynamicArchiveBuilder(const char* archive_name) : _archive_name(archive_name) {}
61 void mark_pointer(address* ptr_loc) {
62 ArchivePtrMarker::mark_pointer(ptr_loc);
63 }
64
65 static int dynamic_dump_method_comparator(Method* a, Method* b) {
66 Symbol* a_name = a->name();
67 Symbol* b_name = b->name();
68
69 if (a_name == b_name) {
70 return 0;
71 }
72
73 u4 a_offset = ArchiveBuilder::current()->any_to_offset_u4(a_name);
74 u4 b_offset = ArchiveBuilder::current()->any_to_offset_u4(b_name);
75
76 if (a_offset < b_offset) {
77 return -1;
78 } else {
79 assert(a_offset > b_offset, "must be");
80 return 1;
81 }
82 }
83
84 public:
85 DynamicArchiveHeader *_header;
86
87 void init_header();
88 void release_header();
89 void post_dump();
90 void sort_methods();
91 void sort_methods(InstanceKlass* ik) const;
92 void remark_pointers_for_instance_klass(InstanceKlass* k, bool should_mark) const;
93 void write_archive(char* serialized_data);
94 void gather_array_klasses();
95
96 public:
97 DynamicArchiveBuilder() : ArchiveBuilder() { }
98
99 // Do this before and after the archive dump to see if any corruption
100 // is caused by dynamic dumping.
101 void verify_universe(const char* info) {
102 if (VerifyBeforeExit) {
103 log_info(cds)("Verify %s", info);
104 // Among other things, this ensures that Eden top is correct.
105 Universe::heap()->prepare_for_verify();
106 Universe::verify(info);
107 }
108 }
109
110 void doit() {
111 verify_universe("Before CDS dynamic dump");
112 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
113
114 // Block concurrent class unloading from changing the _dumptime_table
115 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
116 SystemDictionaryShared::find_all_archivable_classes();
117
118 if (SystemDictionaryShared::is_dumptime_table_empty()) {
119 log_warning(cds, dynamic)("There is no class to be included in the dynamic archive.");
120 return;
121 }
122
123 log_info(cds,dynamic)("CDS dynamic dump: clinit = " JLONG_FORMAT "ms)",
124 ClassLoader::class_init_time_ms());
125
126 init_header();
127 gather_source_objs();
128 gather_array_klasses();
129 reserve_buffer();
130
131 log_info(cds, dynamic)("Copying %d klasses and %d symbols",
132 klasses()->length(), symbols()->length());
133 dump_rw_metadata();
134 dump_ro_metadata();
135 relocate_metaspaceobj_embedded_pointers();
136
137 verify_estimate_size(_estimated_metaspaceobj_bytes, "MetaspaceObjs");
138
139 sort_methods();
140
141 log_info(cds)("Make classes shareable");
142 make_klasses_shareable();
143
144 char* serialized_data;
145 {
146 // Write the symbol table and system dictionaries to the RO space.
147 // Note that these tables still point to the *original* objects, so
148 // they would need to call DynamicArchive::original_to_target() to
149 // get the correct addresses.
150 assert(current_dump_region() == ro_region(), "Must be RO space");
151 SymbolTable::write_to_archive(symbols());
152
153 ArchiveBuilder::OtherROAllocMark mark;
154 SystemDictionaryShared::write_to_archive(false);
155
156 DynamicArchive::dump_array_klasses();
157 AOTClassLinker::write_to_archive();
158 TrainingData::dump_training_data();
159
160 serialized_data = ro_region()->top();
161 WriteClosure wc(ro_region());
162 ArchiveBuilder::serialize_dynamic_archivable_items(&wc);
163 }
164
165 verify_estimate_size(_estimated_hashtable_bytes, "Hashtables");
166
167 log_info(cds)("Adjust lambda proxy class dictionary");
168 SystemDictionaryShared::adjust_lambda_proxy_class_dictionary();
169
170 log_info(cds)("Make training data shareable");
171 make_training_data_shareable();
172
173 relocate_to_requested();
174
175 write_archive(serialized_data);
176 release_header();
177 DynamicArchive::post_dump();
178
179 post_dump();
180
181 assert(_num_dump_regions_used == _total_dump_regions, "must be");
182 verify_universe("After CDS dynamic dump");
183 }
184
185 virtual void iterate_roots(MetaspaceClosure* it) {
186 FileMapInfo::metaspace_pointers_do(it);
187 SystemDictionaryShared::dumptime_classes_do(it);
188 TrainingData::iterate_roots(it);
189 iterate_primitive_array_klasses(it);
190 }
191
192 void iterate_primitive_array_klasses(MetaspaceClosure* it) {
193 for (int i = T_BOOLEAN; i <= T_LONG; i++) {
194 assert(is_java_primitive((BasicType)i), "sanity");
195 Klass* k = Universe::typeArrayKlass((BasicType)i); // this give you "[I", etc
196 assert(MetaspaceShared::is_shared_static((void*)k),
197 "one-dimensional primitive array should be in static archive");
198 ArrayKlass* ak = ArrayKlass::cast(k);
199 while (ak != nullptr && ak->is_shared()) {
200 Klass* next_k = ak->array_klass_or_null();
201 if (next_k != nullptr) {
202 ak = ArrayKlass::cast(next_k);
203 } else {
204 ak = nullptr;
205 }
206 }
207 if (ak != nullptr) {
208 assert(ak->dimension() > 1, "sanity");
209 // this is the lowest dimension that's not in the static archive
210 it->push(&ak);
211 }
212 }
213 }
214 };
215
216 void DynamicArchiveBuilder::init_header() {
217 FileMapInfo* mapinfo = new FileMapInfo(_archive_name, false);
218 assert(FileMapInfo::dynamic_info() == mapinfo, "must be");
219 FileMapInfo* base_info = FileMapInfo::current_info();
220 // header only be available after populate_header
221 mapinfo->populate_header(base_info->core_region_alignment());
222 _header = mapinfo->dynamic_header();
223
224 _header->set_base_header_crc(base_info->crc());
225 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
226 _header->set_base_region_crc(i, base_info->region_crc(i));
227 }
228 }
229
230 void DynamicArchiveBuilder::release_header() {
231 // We temporarily allocated a dynamic FileMapInfo for dumping, which makes it appear we
232 // have mapped a dynamic archive, but we actually have not. We are in a safepoint now.
233 // Let's free it so that if class loading happens after we leave the safepoint, nothing
234 // bad will happen.
235 assert(SafepointSynchronize::is_at_safepoint(), "must be");
236 FileMapInfo *mapinfo = FileMapInfo::dynamic_info();
237 assert(mapinfo != nullptr && _header == mapinfo->dynamic_header(), "must be");
238 delete mapinfo;
239 assert(!DynamicArchive::is_mapped(), "must be");
240 _header = nullptr;
241 }
242
243 void DynamicArchiveBuilder::post_dump() {
244 ArchivePtrMarker::reset_map_and_vs();
245 AOTClassLinker::dispose();
246 }
247
248 void DynamicArchiveBuilder::sort_methods() {
249 InstanceKlass::disable_method_binary_search();
250 for (int i = 0; i < klasses()->length(); i++) {
251 Klass* k = get_buffered_addr(klasses()->at(i));
252 if (k->is_instance_klass()) {
253 sort_methods(InstanceKlass::cast(k));
254 }
255 }
256 }
257
258 // The address order of the copied Symbols may be different than when the original
259 // klasses were created. Re-sort all the tables. See Method::sort_methods().
260 void DynamicArchiveBuilder::sort_methods(InstanceKlass* ik) const {
261 assert(ik != nullptr, "DynamicArchiveBuilder currently doesn't support dumping the base archive");
262 if (MetaspaceShared::is_in_shared_metaspace(ik)) {
263 // We have reached a supertype that's already in the base archive
264 return;
265 }
266 assert(is_in_buffer_space(ik), "method sorting must be done on buffered class, not original class");
267 if (ik->java_mirror() == nullptr) {
268 // null mirror means this class has already been visited and methods are already sorted
269 return;
270 }
271 ik->remove_java_mirror();
272
273 if (log_is_enabled(Debug, cds, dynamic)) {
274 ResourceMark rm;
275 log_debug(cds, dynamic)("sorting methods for " PTR_FORMAT " (" PTR_FORMAT ") %s",
276 p2i(ik), p2i(to_requested(ik)), ik->external_name());
277 }
278
279 // Method sorting may re-layout the [iv]tables, which would change the offset(s)
280 // of the locations in an InstanceKlass that would contain pointers. Let's clear
281 // all the existing pointer marking bits, and re-mark the pointers after sorting.
282 remark_pointers_for_instance_klass(ik, false);
283
284 // Make sure all supertypes have been sorted
285 sort_methods(ik->java_super());
286 Array<InstanceKlass*>* interfaces = ik->local_interfaces();
287 int len = interfaces->length();
288 for (int i = 0; i < len; i++) {
289 sort_methods(interfaces->at(i));
290 }
291
292 #ifdef ASSERT
293 if (ik->methods() != nullptr) {
294 for (int m = 0; m < ik->methods()->length(); m++) {
295 Symbol* name = ik->methods()->at(m)->name();
296 assert(MetaspaceShared::is_in_shared_metaspace(name) || is_in_buffer_space(name), "must be");
297 }
298 }
299 if (ik->default_methods() != nullptr) {
300 for (int m = 0; m < ik->default_methods()->length(); m++) {
301 Symbol* name = ik->default_methods()->at(m)->name();
302 assert(MetaspaceShared::is_in_shared_metaspace(name) || is_in_buffer_space(name), "must be");
303 }
304 }
305 #endif
306
307 Method::sort_methods(ik->methods(), /*set_idnums=*/true, dynamic_dump_method_comparator);
308 if (ik->default_methods() != nullptr) {
309 Method::sort_methods(ik->default_methods(), /*set_idnums=*/false, dynamic_dump_method_comparator);
310 }
311 if (ik->is_linked()) {
312 // If the class has already been linked, we must relayout the i/v tables, whose order depends
313 // on the method sorting order.
314 // If the class is unlinked, we cannot layout the i/v tables yet. This is OK, as the
315 // i/v tables will be initialized at runtime after bytecode verification.
316 ik->vtable().initialize_vtable();
317 ik->itable().initialize_itable();
318 }
319
320 // Set all the pointer marking bits after sorting.
321 remark_pointers_for_instance_klass(ik, true);
322 }
323
324 template<bool should_mark>
325 class PointerRemarker: public MetaspaceClosure {
326 public:
327 virtual bool do_ref(Ref* ref, bool read_only) {
328 if (should_mark) {
329 ArchivePtrMarker::mark_pointer(ref->addr());
330 } else {
331 ArchivePtrMarker::clear_pointer(ref->addr());
332 }
333 return false; // don't recurse
334 }
335 };
336
337 void DynamicArchiveBuilder::remark_pointers_for_instance_klass(InstanceKlass* k, bool should_mark) const {
338 if (should_mark) {
339 PointerRemarker<true> marker;
340 k->metaspace_pointers_do(&marker);
341 marker.finish();
342 } else {
343 PointerRemarker<false> marker;
344 k->metaspace_pointers_do(&marker);
345 marker.finish();
346 }
347 }
348
349 void DynamicArchiveBuilder::write_archive(char* serialized_data) {
350 _header->set_shared_path_table(FileMapInfo::shared_path_table().table());
351 _header->set_serialized_data(serialized_data);
352
353 FileMapInfo* dynamic_info = FileMapInfo::dynamic_info();
354 assert(dynamic_info != nullptr, "Sanity");
355
356 dynamic_info->open_for_write();
357 ArchiveHeapInfo no_heap_for_dynamic_dump;
358 ArchiveBuilder::write_archive(dynamic_info, &no_heap_for_dynamic_dump);
359
360 address base = _requested_dynamic_archive_bottom;
361 address top = _requested_dynamic_archive_top;
362 size_t file_size = pointer_delta(top, base, sizeof(char));
363
364 log_info(cds, dynamic)("Written dynamic archive " PTR_FORMAT " - " PTR_FORMAT
365 " [" UINT32_FORMAT " bytes header, " SIZE_FORMAT " bytes total]",
366 p2i(base), p2i(top), _header->header_size(), file_size);
367
368 log_info(cds, dynamic)("%d klasses; %d symbols", klasses()->length(), symbols()->length());
369 }
370
371 void DynamicArchiveBuilder::gather_array_klasses() {
372 for (int i = 0; i < klasses()->length(); i++) {
373 if (klasses()->at(i)->is_objArray_klass()) {
374 ObjArrayKlass* oak = ObjArrayKlass::cast(klasses()->at(i));
375 Klass* elem = oak->element_klass();
376 if (MetaspaceShared::is_shared_static(elem)) {
377 // Only capture the array klass whose element_klass is in the static archive.
378 // During run time, setup (see DynamicArchive::setup_array_klasses()) is needed
379 // so that the element_klass can find its array klasses from the dynamic archive.
380 DynamicArchive::append_array_klass(oak);
381 } else {
382 // The element_klass and its array klasses are in the same archive.
383 assert(!MetaspaceShared::is_shared_static(oak),
384 "we should not gather klasses that are already in the static archive");
385 }
386 }
387 }
388 log_debug(cds)("Total array klasses gathered for dynamic archive: %d", DynamicArchive::num_array_klasses());
389 }
390
391 class VM_PopulateDynamicDumpSharedSpace: public VM_GC_Sync_Operation {
392 DynamicArchiveBuilder _builder;
393 public:
394 VM_PopulateDynamicDumpSharedSpace(const char* archive_name)
395 : VM_GC_Sync_Operation(), _builder(archive_name) {}
396 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
397 void doit() {
398 ResourceMark rm;
399 if (AllowArchivingWithJavaAgent) {
400 log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
401 "for testing purposes only and should not be used in a production environment");
402 }
403 FileMapInfo::check_nonempty_dir_in_shared_path_table();
404
405 _builder.doit();
406 }
407 ~VM_PopulateDynamicDumpSharedSpace() {
408 RegeneratedClasses::cleanup();
409 }
410 };
411
412 // _array_klasses and _dynamic_archive_array_klasses only hold the array klasses
413 // which have element klass in the static archive.
414 GrowableArray<ObjArrayKlass*>* DynamicArchive::_array_klasses = nullptr;
415 Array<ObjArrayKlass*>* DynamicArchive::_dynamic_archive_array_klasses = nullptr;
416
417 void DynamicArchive::append_array_klass(ObjArrayKlass* ak) {
418 if (_array_klasses == nullptr) {
419 _array_klasses = new (mtClassShared) GrowableArray<ObjArrayKlass*>(50, mtClassShared);
420 }
421 _array_klasses->append(ak);
422 }
423
424 void DynamicArchive::dump_array_klasses() {
425 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity");
426 if (_array_klasses != nullptr) {
427 ArchiveBuilder* builder = ArchiveBuilder::current();
428 int num_array_klasses = _array_klasses->length();
429 _dynamic_archive_array_klasses =
430 ArchiveBuilder::new_ro_array<ObjArrayKlass*>(num_array_klasses);
431 for (int i = 0; i < num_array_klasses; i++) {
432 builder->write_pointer_in_buffer(_dynamic_archive_array_klasses->adr_at(i), _array_klasses->at(i));
433 }
434 }
435 }
436
437 void DynamicArchive::setup_array_klasses() {
438 if (_dynamic_archive_array_klasses != nullptr) {
439 for (int i = 0; i < _dynamic_archive_array_klasses->length(); i++) {
440 ObjArrayKlass* oak = _dynamic_archive_array_klasses->at(i);
441 assert(!oak->is_typeArray_klass(), "all type array classes must be in static archive");
442
443 Klass* elm = oak->element_klass();
444 assert(MetaspaceShared::is_shared_static((void*)elm), "must be");
445
446 if (elm->is_instance_klass()) {
447 assert(InstanceKlass::cast(elm)->array_klasses() == nullptr, "must be");
448 InstanceKlass::cast(elm)->set_array_klasses(oak);
449 } else {
450 assert(elm->is_array_klass(), "sanity");
451 assert(ArrayKlass::cast(elm)->higher_dimension() == nullptr, "must be");
452 ArrayKlass::cast(elm)->set_higher_dimension(oak);
453 }
454 }
455 log_debug(cds)("Total array klasses read from dynamic archive: %d", _dynamic_archive_array_klasses->length());
456 }
457 }
458
459 void DynamicArchive::serialize_array_klasses(SerializeClosure* soc) {
460 soc->do_ptr(&_dynamic_archive_array_klasses);
461 }
462
463 void DynamicArchive::make_array_klasses_shareable() {
464 if (_array_klasses != nullptr) {
465 int num_array_klasses = _array_klasses->length();
466 for (int i = 0; i < num_array_klasses; i++) {
467 ObjArrayKlass* k = ArchiveBuilder::current()->get_buffered_addr(_array_klasses->at(i));
468 k->remove_unshareable_info();
469 }
470 }
471 }
472
473 void DynamicArchive::post_dump() {
474 if (_array_klasses != nullptr) {
475 delete _array_klasses;
476 _array_klasses = nullptr;
477 }
478 }
479
480 int DynamicArchive::num_array_klasses() {
481 return _array_klasses != nullptr ? _array_klasses->length() : 0;
482 }
483
484 void DynamicArchive::check_for_dynamic_dump() {
485 if (CDSConfig::is_dumping_dynamic_archive() && !CDSConfig::is_using_archive()) {
486 // This could happen if SharedArchiveFile has failed to load:
487 // - -Xshare:off was specified
488 // - SharedArchiveFile points to an non-existent file.
489 // - SharedArchiveFile points to an archive that has failed CRC check
490 // - SharedArchiveFile is not specified and the VM doesn't have a compatible default archive
491
492 #define __THEMSG " is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info."
493 if (RecordDynamicDumpInfo) {
494 log_error(cds)("-XX:+RecordDynamicDumpInfo%s", __THEMSG);
495 MetaspaceShared::unrecoverable_loading_error();
496 } else {
497 assert(ArchiveClassesAtExit != nullptr, "sanity");
498 log_warning(cds)("-XX:ArchiveClassesAtExit" __THEMSG);
499 }
500 #undef __THEMSG
501 CDSConfig::disable_dumping_dynamic_archive();
502 }
503 }
504
505 void DynamicArchive::dump_at_exit(JavaThread* current, const char* archive_name) {
506 ExceptionMark em(current);
507 ResourceMark rm(current);
508 CDSConfig::DumperThreadMark dumper_thread_mark(current);
509
510 if (!CDSConfig::is_dumping_dynamic_archive() || archive_name == nullptr) {
511 return;
512 }
513
514 log_info(cds, dynamic)("Preparing for dynamic dump at exit in thread %s", current->name());
515
516 JavaThread* THREAD = current; // For TRAPS processing related to link_shared_classes
517
518 {
519 // FIXME-HACK - make sure we have at least one class in the dynamic archive
520 TempNewSymbol class_name = SymbolTable::new_symbol("sun/nio/cs/IBM850"); // unusual class; shouldn't be used by our tests cases.
521 SystemDictionary::resolve_or_null(class_name, Handle(), Handle(), THREAD);
522 guarantee(!HAS_PENDING_EXCEPTION, "must have this class");
523 }
524
525 MetaspaceShared::link_shared_classes(false/*not from jcmd*/, THREAD);
526 if (!HAS_PENDING_EXCEPTION) {
527 // copy shared path table to saved.
528 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
529 if (!HAS_PENDING_EXCEPTION) {
530 VM_PopulateDynamicDumpSharedSpace op(archive_name);
531 VMThread::execute(&op);
532 return;
533 }
534 }
535
536 // One of the prepatory steps failed
537 oop ex = current->pending_exception();
538 log_error(cds)("Dynamic dump has failed");
539 log_error(cds)("%s: %s", ex->klass()->external_name(),
540 java_lang_String::as_utf8_string(java_lang_Throwable::message(ex)));
541 CLEAR_PENDING_EXCEPTION;
542 CDSConfig::disable_dumping_dynamic_archive(); // Just for good measure
543 }
544
545 // This is called by "jcmd VM.cds dynamic_dump"
546 void DynamicArchive::dump_for_jcmd(const char* archive_name, TRAPS) {
547 CDSConfig::DumperThreadMark dumper_thread_mark(THREAD);
548 assert(CDSConfig::is_using_archive() && RecordDynamicDumpInfo, "already checked in arguments.cpp");
549 assert(ArchiveClassesAtExit == nullptr, "already checked in arguments.cpp");
550 assert(CDSConfig::is_dumping_dynamic_archive(), "already checked by check_for_dynamic_dump() during VM startup");
551 MetaspaceShared::link_shared_classes(true/*from jcmd*/, CHECK);
552 // copy shared path table to saved.
553 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
554 VM_PopulateDynamicDumpSharedSpace op(archive_name);
555 VMThread::execute(&op);
556 }
557
558 bool DynamicArchive::validate(FileMapInfo* dynamic_info) {
559 assert(!dynamic_info->is_static(), "must be");
560 // Check if the recorded base archive matches with the current one
561 FileMapInfo* base_info = FileMapInfo::current_info();
562 DynamicArchiveHeader* dynamic_header = dynamic_info->dynamic_header();
563
564 // Check the header crc
565 if (dynamic_header->base_header_crc() != base_info->crc()) {
566 log_warning(cds)("Dynamic archive cannot be used: static archive header checksum verification failed.");
567 return false;
568 }
569
570 // Check each space's crc
571 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
572 if (dynamic_header->base_region_crc(i) != base_info->region_crc(i)) {
573 log_warning(cds)("Dynamic archive cannot be used: static archive region #%d checksum verification failed.", i);
574 return false;
575 }
576 }
577
578 return true;
579 }
580
581 void DynamicArchiveHeader::print(outputStream* st) {
582 ResourceMark rm;
583
584 st->print_cr("- base_header_crc: 0x%08x", base_header_crc());
585 for (int i = 0; i < NUM_CDS_REGIONS; i++) {
586 st->print_cr("- base_region_crc[%d]: 0x%08x", i, base_region_crc(i));
587 }
588 }