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/archiveBuilder.hpp"
27 #include "cds/archiveHeapWriter.hpp"
28 #include "cds/archiveUtils.inline.hpp"
29 #include "cds/cds_globals.hpp"
30 #include "cds/cdsConfig.hpp"
31 #include "cds/classPrelinker.hpp"
32 #include "cds/classPreloader.hpp"
33 #include "cds/dynamicArchive.hpp"
34 #include "cds/metaspaceShared.hpp"
35 #include "cds/regeneratedClasses.hpp"
36 #include "classfile/classLoader.hpp"
37 #include "classfile/classLoaderData.inline.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionaryShared.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "gc/shared/collectedHeap.hpp"
42 #include "gc/shared/gcVMOperations.hpp"
43 #include "gc/shared/gc_globals.hpp"
44 #include "jvm.h"
45 #include "logging/log.hpp"
46 #include "memory/metaspaceClosure.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "oops/klass.inline.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/os.hpp"
51 #include "runtime/sharedRuntime.hpp"
52 #include "runtime/vmThread.hpp"
53 #include "runtime/vmOperations.hpp"
54 #include "utilities/align.hpp"
55 #include "utilities/bitMap.inline.hpp"
56
57
58 class DynamicArchiveBuilder : public ArchiveBuilder {
59 const char* _archive_name;
60 public:
61 DynamicArchiveBuilder(const char* archive_name) : _archive_name(archive_name) {}
62 void mark_pointer(address* ptr_loc) {
63 ArchivePtrMarker::mark_pointer(ptr_loc);
64 }
65
66 static int dynamic_dump_method_comparator(Method* a, Method* b) {
67 Symbol* a_name = a->name();
68 Symbol* b_name = b->name();
69
70 if (a_name == b_name) {
71 return 0;
72 }
73
74 u4 a_offset = ArchiveBuilder::current()->any_to_offset_u4(a_name);
75 u4 b_offset = ArchiveBuilder::current()->any_to_offset_u4(b_name);
76
77 if (a_offset < b_offset) {
78 return -1;
79 } else {
80 assert(a_offset > b_offset, "must be");
81 return 1;
82 }
83 }
84
85 public:
86 DynamicArchiveHeader *_header;
87
88 void init_header();
89 void release_header();
90 void post_dump();
91 void sort_methods();
92 void sort_methods(InstanceKlass* ik) const;
93 void remark_pointers_for_instance_klass(InstanceKlass* k, bool should_mark) const;
94 void write_archive(char* serialized_data);
95 void gather_array_klasses();
96
97 public:
98 DynamicArchiveBuilder() : ArchiveBuilder() { }
99
100 // Do this before and after the archive dump to see if any corruption
101 // is caused by dynamic dumping.
102 void verify_universe(const char* info) {
103 if (VerifyBeforeExit) {
104 log_info(cds)("Verify %s", info);
105 // Among other things, this ensures that Eden top is correct.
106 Universe::heap()->prepare_for_verify();
107 Universe::verify(info);
108 }
109 }
110
111 void doit() {
112 verify_universe("Before CDS dynamic dump");
113 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
114
115 // Block concurrent class unloading from changing the _dumptime_table
116 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
117 SystemDictionaryShared::check_excluded_classes();
118
119 if (SystemDictionaryShared::is_dumptime_table_empty()) {
120 log_warning(cds, dynamic)("There is no class to be included in the dynamic archive.");
121 return;
122 }
123
124 log_info(cds,dynamic)("CDS dynamic dump: clinit = %ldms)",
125 ClassLoader::class_init_time_ms());
126
127 init_header();
128 gather_source_objs();
129 gather_array_klasses();
130 reserve_buffer();
131
132 log_info(cds, dynamic)("Copying %d klasses and %d symbols",
133 klasses()->length(), symbols()->length());
134 dump_rw_metadata();
135 dump_ro_metadata();
136 relocate_metaspaceobj_embedded_pointers();
137
138 verify_estimate_size(_estimated_metaspaceobj_bytes, "MetaspaceObjs");
139
140 sort_methods();
141
142 {
143 ArchiveBuilder::OtherROAllocMark mark;
144 ClassPreloader::record_preloaded_classes(false);
145 }
146
147 log_info(cds)("Make classes shareable");
148 make_klasses_shareable();
149
150 char* serialized_data;
151 {
152 // Write the symbol table and system dictionaries to the RO space.
153 // Note that these tables still point to the *original* objects, so
154 // they would need to call DynamicArchive::original_to_target() to
155 // get the correct addresses.
156 assert(current_dump_region() == ro_region(), "Must be RO space");
157 SymbolTable::write_to_archive(symbols());
158
159 ArchiveBuilder::OtherROAllocMark mark;
160 SystemDictionaryShared::write_to_archive(false);
161
162 DynamicArchive::dump_array_klasses();
163 ClassPreloader::record_initiated_classes(false);
164 TrainingData::dump_training_data();
165
166 serialized_data = ro_region()->top();
167 WriteClosure wc(ro_region());
168 ArchiveBuilder::serialize_dynamic_archivable_items(&wc);
169 }
170
171 verify_estimate_size(_estimated_hashtable_bytes, "Hashtables");
172
173 log_info(cds)("Adjust lambda proxy class dictionary");
174 SystemDictionaryShared::adjust_lambda_proxy_class_dictionary();
175
176 log_info(cds)("Adjust method info dictionary");
177 SystemDictionaryShared::adjust_method_info_dictionary();
178
179 log_info(cds)("Make training data shareable");
180 make_training_data_shareable();
181
182 relocate_to_requested();
183
184 write_archive(serialized_data);
185 release_header();
186 DynamicArchive::post_dump();
187
188 post_dump();
189
190 assert(_num_dump_regions_used == _total_dump_regions, "must be");
191 verify_universe("After CDS dynamic dump");
192 }
193
194 virtual void iterate_roots(MetaspaceClosure* it) {
195 FileMapInfo::metaspace_pointers_do(it);
196 SystemDictionaryShared::dumptime_classes_do(it);
197 TrainingData::iterate_roots(it);
198 iterate_primitive_array_klasses(it);
199 }
200
201 void iterate_primitive_array_klasses(MetaspaceClosure* it) {
202 for (int i = T_BOOLEAN; i <= T_LONG; i++) {
203 assert(is_java_primitive((BasicType)i), "sanity");
204 Klass* k = Universe::typeArrayKlass((BasicType)i); // this give you "[I", etc
205 assert(MetaspaceShared::is_shared_static((void*)k),
206 "one-dimensional primitive array should be in static archive");
207 ArrayKlass* ak = ArrayKlass::cast(k);
208 while (ak != nullptr && ak->is_shared()) {
209 Klass* next_k = ak->array_klass_or_null();
210 if (next_k != nullptr) {
211 ak = ArrayKlass::cast(next_k);
212 } else {
213 ak = nullptr;
214 }
215 }
216 if (ak != nullptr) {
217 assert(ak->dimension() > 1, "sanity");
218 // this is the lowest dimension that's not in the static archive
219 it->push(&ak);
220 }
221 }
222 }
223 };
224
225 void DynamicArchiveBuilder::init_header() {
226 FileMapInfo* mapinfo = new FileMapInfo(_archive_name, false);
227 assert(FileMapInfo::dynamic_info() == mapinfo, "must be");
228 FileMapInfo* base_info = FileMapInfo::current_info();
229 // header only be available after populate_header
230 mapinfo->populate_header(base_info->core_region_alignment());
231 _header = mapinfo->dynamic_header();
232
233 _header->set_base_header_crc(base_info->crc());
234 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
235 _header->set_base_region_crc(i, base_info->region_crc(i));
236 }
237 }
238
239 void DynamicArchiveBuilder::release_header() {
240 // We temporarily allocated a dynamic FileMapInfo for dumping, which makes it appear we
241 // have mapped a dynamic archive, but we actually have not. We are in a safepoint now.
242 // Let's free it so that if class loading happens after we leave the safepoint, nothing
243 // bad will happen.
244 assert(SafepointSynchronize::is_at_safepoint(), "must be");
245 FileMapInfo *mapinfo = FileMapInfo::dynamic_info();
246 assert(mapinfo != nullptr && _header == mapinfo->dynamic_header(), "must be");
247 delete mapinfo;
248 assert(!DynamicArchive::is_mapped(), "must be");
249 _header = nullptr;
250 }
251
252 void DynamicArchiveBuilder::post_dump() {
253 ArchivePtrMarker::reset_map_and_vs();
254 ClassPreloader::dispose();
255 ClassPrelinker::dispose();
256 }
257
258 void DynamicArchiveBuilder::sort_methods() {
259 InstanceKlass::disable_method_binary_search();
260 for (int i = 0; i < klasses()->length(); i++) {
261 Klass* k = get_buffered_addr(klasses()->at(i));
262 if (k->is_instance_klass()) {
263 sort_methods(InstanceKlass::cast(k));
264 }
265 }
266 }
267
268 // The address order of the copied Symbols may be different than when the original
269 // klasses were created. Re-sort all the tables. See Method::sort_methods().
270 void DynamicArchiveBuilder::sort_methods(InstanceKlass* ik) const {
271 assert(ik != nullptr, "DynamicArchiveBuilder currently doesn't support dumping the base archive");
272 if (MetaspaceShared::is_in_shared_metaspace(ik)) {
273 // We have reached a supertype that's already in the base archive
274 return;
275 }
276 assert(is_in_buffer_space(ik), "method sorting must be done on buffered class, not original class");
277 if (ik->java_mirror() == nullptr) {
278 // null mirror means this class has already been visited and methods are already sorted
279 return;
280 }
281 ik->remove_java_mirror();
282
283 if (log_is_enabled(Debug, cds, dynamic)) {
284 ResourceMark rm;
285 log_debug(cds, dynamic)("sorting methods for " PTR_FORMAT " (" PTR_FORMAT ") %s",
286 p2i(ik), p2i(to_requested(ik)), ik->external_name());
287 }
288
289 // Method sorting may re-layout the [iv]tables, which would change the offset(s)
290 // of the locations in an InstanceKlass that would contain pointers. Let's clear
291 // all the existing pointer marking bits, and re-mark the pointers after sorting.
292 remark_pointers_for_instance_klass(ik, false);
293
294 // Make sure all supertypes have been sorted
295 sort_methods(ik->java_super());
296 Array<InstanceKlass*>* interfaces = ik->local_interfaces();
297 int len = interfaces->length();
298 for (int i = 0; i < len; i++) {
299 sort_methods(interfaces->at(i));
300 }
301
302 #ifdef ASSERT
303 if (ik->methods() != nullptr) {
304 for (int m = 0; m < ik->methods()->length(); m++) {
305 Symbol* name = ik->methods()->at(m)->name();
306 assert(MetaspaceShared::is_in_shared_metaspace(name) || is_in_buffer_space(name), "must be");
307 }
308 }
309 if (ik->default_methods() != nullptr) {
310 for (int m = 0; m < ik->default_methods()->length(); m++) {
311 Symbol* name = ik->default_methods()->at(m)->name();
312 assert(MetaspaceShared::is_in_shared_metaspace(name) || is_in_buffer_space(name), "must be");
313 }
314 }
315 #endif
316
317 Method::sort_methods(ik->methods(), /*set_idnums=*/true, dynamic_dump_method_comparator);
318 if (ik->default_methods() != nullptr) {
319 Method::sort_methods(ik->default_methods(), /*set_idnums=*/false, dynamic_dump_method_comparator);
320 }
321 if (ik->is_linked()) {
322 // If the class has already been linked, we must relayout the i/v tables, whose order depends
323 // on the method sorting order.
324 // If the class is unlinked, we cannot layout the i/v tables yet. This is OK, as the
325 // i/v tables will be initialized at runtime after bytecode verification.
326 ik->vtable().initialize_vtable();
327 ik->itable().initialize_itable();
328 }
329
330 // Set all the pointer marking bits after sorting.
331 remark_pointers_for_instance_klass(ik, true);
332 }
333
334 template<bool should_mark>
335 class PointerRemarker: public MetaspaceClosure {
336 public:
337 virtual bool do_ref(Ref* ref, bool read_only) {
338 if (should_mark) {
339 ArchivePtrMarker::mark_pointer(ref->addr());
340 } else {
341 ArchivePtrMarker::clear_pointer(ref->addr());
342 }
343 return false; // don't recurse
344 }
345 };
346
347 void DynamicArchiveBuilder::remark_pointers_for_instance_klass(InstanceKlass* k, bool should_mark) const {
348 if (should_mark) {
349 PointerRemarker<true> marker;
350 k->metaspace_pointers_do(&marker);
351 marker.finish();
352 } else {
353 PointerRemarker<false> marker;
354 k->metaspace_pointers_do(&marker);
355 marker.finish();
356 }
357 }
358
359 void DynamicArchiveBuilder::write_archive(char* serialized_data) {
360 _header->set_shared_path_table(FileMapInfo::shared_path_table().table());
361 _header->set_serialized_data(serialized_data);
362
363 FileMapInfo* dynamic_info = FileMapInfo::dynamic_info();
364 assert(dynamic_info != nullptr, "Sanity");
365
366 dynamic_info->open_for_write();
367 ArchiveHeapInfo no_heap_for_dynamic_dump;
368 ArchiveBuilder::write_archive(dynamic_info, &no_heap_for_dynamic_dump);
369
370 address base = _requested_dynamic_archive_bottom;
371 address top = _requested_dynamic_archive_top;
372 size_t file_size = pointer_delta(top, base, sizeof(char));
373
374 log_info(cds, dynamic)("Written dynamic archive " PTR_FORMAT " - " PTR_FORMAT
375 " [" UINT32_FORMAT " bytes header, " SIZE_FORMAT " bytes total]",
376 p2i(base), p2i(top), _header->header_size(), file_size);
377
378 log_info(cds, dynamic)("%d klasses; %d symbols", klasses()->length(), symbols()->length());
379 }
380
381 void DynamicArchiveBuilder::gather_array_klasses() {
382 for (int i = 0; i < klasses()->length(); i++) {
383 if (klasses()->at(i)->is_objArray_klass()) {
384 ObjArrayKlass* oak = ObjArrayKlass::cast(klasses()->at(i));
385 Klass* elem = oak->element_klass();
386 if (MetaspaceShared::is_shared_static(elem)) {
387 // Only capture the array klass whose element_klass is in the static archive.
388 // During run time, setup (see DynamicArchive::setup_array_klasses()) is needed
389 // so that the element_klass can find its array klasses from the dynamic archive.
390 DynamicArchive::append_array_klass(oak);
391 } else {
392 // The element_klass and its array klasses are in the same archive.
393 assert(!MetaspaceShared::is_shared_static(oak),
394 "we should not gather klasses that are already in the static archive");
395 }
396 }
397 }
398 log_debug(cds)("Total array klasses gathered for dynamic archive: %d", DynamicArchive::num_array_klasses());
399 }
400
401 class VM_PopulateDynamicDumpSharedSpace: public VM_GC_Sync_Operation {
402 DynamicArchiveBuilder _builder;
403 public:
404 VM_PopulateDynamicDumpSharedSpace(const char* archive_name)
405 : VM_GC_Sync_Operation(), _builder(archive_name) {}
406 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
407 void doit() {
408 ResourceMark rm;
409 if (AllowArchivingWithJavaAgent) {
410 log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
411 "for testing purposes only and should not be used in a production environment");
412 }
413 FileMapInfo::check_nonempty_dir_in_shared_path_table();
414
415 _builder.doit();
416 }
417 ~VM_PopulateDynamicDumpSharedSpace() {
418 RegeneratedClasses::cleanup();
419 }
420 };
421
422 // _array_klasses and _dynamic_archive_array_klasses only hold the array klasses
423 // which have element klass in the static archive.
424 GrowableArray<ObjArrayKlass*>* DynamicArchive::_array_klasses = nullptr;
425 Array<ObjArrayKlass*>* DynamicArchive::_dynamic_archive_array_klasses = nullptr;
426
427 void DynamicArchive::append_array_klass(ObjArrayKlass* ak) {
428 if (_array_klasses == nullptr) {
429 _array_klasses = new (mtClassShared) GrowableArray<ObjArrayKlass*>(50, mtClassShared);
430 }
431 _array_klasses->append(ak);
432 }
433
434 void DynamicArchive::dump_array_klasses() {
435 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity");
436 if (_array_klasses != nullptr) {
437 ArchiveBuilder* builder = ArchiveBuilder::current();
438 int num_array_klasses = _array_klasses->length();
439 _dynamic_archive_array_klasses =
440 ArchiveBuilder::new_ro_array<ObjArrayKlass*>(num_array_klasses);
441 for (int i = 0; i < num_array_klasses; i++) {
442 builder->write_pointer_in_buffer(_dynamic_archive_array_klasses->adr_at(i), _array_klasses->at(i));
443 }
444 }
445 }
446
447 void DynamicArchive::setup_array_klasses() {
448 if (_dynamic_archive_array_klasses != nullptr) {
449 for (int i = 0; i < _dynamic_archive_array_klasses->length(); i++) {
450 ObjArrayKlass* oak = _dynamic_archive_array_klasses->at(i);
451 assert(!oak->is_typeArray_klass(), "all type array classes must be in static archive");
452
453 Klass* elm = oak->element_klass();
454 assert(MetaspaceShared::is_shared_static((void*)elm), "must be");
455
456 if (elm->is_instance_klass()) {
457 assert(InstanceKlass::cast(elm)->array_klasses() == nullptr, "must be");
458 InstanceKlass::cast(elm)->set_array_klasses(oak);
459 } else {
460 assert(elm->is_array_klass(), "sanity");
461 assert(ArrayKlass::cast(elm)->higher_dimension() == nullptr, "must be");
462 ArrayKlass::cast(elm)->set_higher_dimension(oak);
463 }
464 }
465 log_debug(cds)("Total array klasses read from dynamic archive: %d", _dynamic_archive_array_klasses->length());
466 }
467 }
468
469 void DynamicArchive::serialize_array_klasses(SerializeClosure* soc) {
470 soc->do_ptr(&_dynamic_archive_array_klasses);
471 }
472
473 void DynamicArchive::make_array_klasses_shareable() {
474 if (_array_klasses != nullptr) {
475 int num_array_klasses = _array_klasses->length();
476 for (int i = 0; i < num_array_klasses; i++) {
477 ObjArrayKlass* k = ArchiveBuilder::current()->get_buffered_addr(_array_klasses->at(i));
478 k->remove_unshareable_info();
479 }
480 }
481 }
482
483 void DynamicArchive::post_dump() {
484 if (_array_klasses != nullptr) {
485 delete _array_klasses;
486 _array_klasses = nullptr;
487 }
488 }
489
490 int DynamicArchive::num_array_klasses() {
491 return _array_klasses != nullptr ? _array_klasses->length() : 0;
492 }
493
494 void DynamicArchive::check_for_dynamic_dump() {
495 if (CDSConfig::is_dumping_dynamic_archive() && !UseSharedSpaces) {
496 // This could happen if SharedArchiveFile has failed to load:
497 // - -Xshare:off was specified
498 // - SharedArchiveFile points to an non-existent file.
499 // - SharedArchiveFile points to an archive that has failed CRC check
500 // - SharedArchiveFile is not specified and the VM doesn't have a compatible default archive
501
502 #define __THEMSG " is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info."
503 if (RecordDynamicDumpInfo) {
504 log_error(cds)("-XX:+RecordDynamicDumpInfo%s", __THEMSG);
505 MetaspaceShared::unrecoverable_loading_error();
506 } else {
507 assert(ArchiveClassesAtExit != nullptr, "sanity");
508 log_warning(cds)("-XX:ArchiveClassesAtExit" __THEMSG);
509 }
510 #undef __THEMSG
511 CDSConfig::disable_dumping_dynamic_archive();
512 }
513 }
514
515 void DynamicArchive::dump_at_exit(JavaThread* current, const char* archive_name) {
516 ExceptionMark em(current);
517 ResourceMark rm(current);
518
519 if (!CDSConfig::is_dumping_dynamic_archive() || archive_name == nullptr) {
520 return;
521 }
522
523 log_info(cds, dynamic)("Preparing for dynamic dump at exit in thread %s", current->name());
524
525 JavaThread* THREAD = current; // For TRAPS processing related to link_shared_classes
526
527 {
528 // FIXME-HACK - make sure we have at least one class in the dynamic archive
529 TempNewSymbol class_name = SymbolTable::new_symbol("sun/nio/cs/IBM850"); // unusual class; shouldn't be used by our tests cases.
530 SystemDictionary::resolve_or_null(class_name, Handle(), Handle(), THREAD);
531 guarantee(!HAS_PENDING_EXCEPTION, "must have this class");
532 }
533
534 MetaspaceShared::link_shared_classes(false/*not from jcmd*/, THREAD);
535 if (!HAS_PENDING_EXCEPTION) {
536 // copy shared path table to saved.
537 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
538 if (!HAS_PENDING_EXCEPTION) {
539 VM_PopulateDynamicDumpSharedSpace op(archive_name);
540 VMThread::execute(&op);
541 return;
542 }
543 }
544
545 // One of the prepatory steps failed
546 oop ex = current->pending_exception();
547 log_error(cds)("Dynamic dump has failed");
548 log_error(cds)("%s: %s", ex->klass()->external_name(),
549 java_lang_String::as_utf8_string(java_lang_Throwable::message(ex)));
550 CLEAR_PENDING_EXCEPTION;
551 CDSConfig::disable_dumping_dynamic_archive(); // Just for good measure
552 }
553
554 // This is called by "jcmd VM.cds dynamic_dump"
555 void DynamicArchive::dump_for_jcmd(const char* archive_name, TRAPS) {
556 assert(UseSharedSpaces && RecordDynamicDumpInfo, "already checked in arguments.cpp");
557 assert(ArchiveClassesAtExit == nullptr, "already checked in arguments.cpp");
558 assert(CDSConfig::is_dumping_dynamic_archive(), "already checked by check_for_dynamic_dump() during VM startup");
559 MetaspaceShared::link_shared_classes(true/*from jcmd*/, CHECK);
560 // copy shared path table to saved.
561 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
562 VM_PopulateDynamicDumpSharedSpace op(archive_name);
563 VMThread::execute(&op);
564 }
565
566 bool DynamicArchive::validate(FileMapInfo* dynamic_info) {
567 assert(!dynamic_info->is_static(), "must be");
568 // Check if the recorded base archive matches with the current one
569 FileMapInfo* base_info = FileMapInfo::current_info();
570 DynamicArchiveHeader* dynamic_header = dynamic_info->dynamic_header();
571
572 // Check the header crc
573 if (dynamic_header->base_header_crc() != base_info->crc()) {
574 log_warning(cds)("Dynamic archive cannot be used: static archive header checksum verification failed.");
575 return false;
576 }
577
578 // Check each space's crc
579 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
580 if (dynamic_header->base_region_crc(i) != base_info->region_crc(i)) {
581 log_warning(cds)("Dynamic archive cannot be used: static archive region #%d checksum verification failed.", i);
582 return false;
583 }
584 }
585
586 return true;
587 }
588
589 void DynamicArchiveHeader::print(outputStream* st) {
590 ResourceMark rm;
591
592 st->print_cr("- base_header_crc: 0x%08x", base_header_crc());
593 for (int i = 0; i < NUM_CDS_REGIONS; i++) {
594 st->print_cr("- base_region_crc[%d]: 0x%08x", i, base_region_crc(i));
595 }
596 }